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42cacb20 DE |
1 | // powerpc.cc -- powerpc target support for gold. |
2 | ||
2571583a | 3 | // Copyright (C) 2008-2017 Free Software Foundation, Inc. |
42cacb20 DE |
4 | // Written by David S. Miller <davem@davemloft.net> |
5 | // and David Edelsohn <edelsohn@gnu.org> | |
6 | ||
7 | // This file is part of gold. | |
8 | ||
9 | // This program is free software; you can redistribute it and/or modify | |
10 | // it under the terms of the GNU General Public License as published by | |
11 | // the Free Software Foundation; either version 3 of the License, or | |
12 | // (at your option) any later version. | |
13 | ||
14 | // This program is distributed in the hope that it will be useful, | |
15 | // but WITHOUT ANY WARRANTY; without even the implied warranty of | |
16 | // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
17 | // GNU General Public License for more details. | |
18 | ||
19 | // You should have received a copy of the GNU General Public License | |
20 | // along with this program; if not, write to the Free Software | |
21 | // Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston, | |
22 | // MA 02110-1301, USA. | |
23 | ||
24 | #include "gold.h" | |
25 | ||
dc3714f3 | 26 | #include <set> |
ec661b9d | 27 | #include <algorithm> |
42cacb20 | 28 | #include "elfcpp.h" |
9d5781f8 | 29 | #include "dwarf.h" |
42cacb20 DE |
30 | #include "parameters.h" |
31 | #include "reloc.h" | |
32 | #include "powerpc.h" | |
33 | #include "object.h" | |
34 | #include "symtab.h" | |
35 | #include "layout.h" | |
36 | #include "output.h" | |
37 | #include "copy-relocs.h" | |
38 | #include "target.h" | |
39 | #include "target-reloc.h" | |
40 | #include "target-select.h" | |
41 | #include "tls.h" | |
42 | #include "errors.h" | |
f345227a | 43 | #include "gc.h" |
42cacb20 DE |
44 | |
45 | namespace | |
46 | { | |
47 | ||
48 | using namespace gold; | |
49 | ||
50 | template<int size, bool big_endian> | |
51 | class Output_data_plt_powerpc; | |
52 | ||
ec661b9d AM |
53 | template<int size, bool big_endian> |
54 | class Output_data_brlt_powerpc; | |
55 | ||
cf43a2fe AM |
56 | template<int size, bool big_endian> |
57 | class Output_data_got_powerpc; | |
58 | ||
59 | template<int size, bool big_endian> | |
60 | class Output_data_glink; | |
61 | ||
ec661b9d AM |
62 | template<int size, bool big_endian> |
63 | class Stub_table; | |
64 | ||
d49044c7 AM |
65 | template<int size, bool big_endian> |
66 | class Output_data_save_res; | |
67 | ||
a3e60ddb AM |
68 | template<int size, bool big_endian> |
69 | class Target_powerpc; | |
70 | ||
71 | struct Stub_table_owner | |
72 | { | |
dc60b26d AM |
73 | Stub_table_owner() |
74 | : output_section(NULL), owner(NULL) | |
75 | { } | |
76 | ||
a3e60ddb AM |
77 | Output_section* output_section; |
78 | const Output_section::Input_section* owner; | |
79 | }; | |
80 | ||
4d9aa155 AM |
81 | inline bool |
82 | is_branch_reloc(unsigned int r_type); | |
83 | ||
590b87ff AM |
84 | // Counter incremented on every Powerpc_relobj constructed. |
85 | static uint32_t object_id = 0; | |
86 | ||
cf43a2fe AM |
87 | template<int size, bool big_endian> |
88 | class Powerpc_relobj : public Sized_relobj_file<size, big_endian> | |
89 | { | |
90 | public: | |
dd93cd0a | 91 | typedef typename elfcpp::Elf_types<size>::Elf_Addr Address; |
e81fea4d AM |
92 | typedef Unordered_set<Section_id, Section_id_hash> Section_refs; |
93 | typedef Unordered_map<Address, Section_refs> Access_from; | |
c9269dff | 94 | |
cf43a2fe AM |
95 | Powerpc_relobj(const std::string& name, Input_file* input_file, off_t offset, |
96 | const typename elfcpp::Ehdr<size, big_endian>& ehdr) | |
97 | : Sized_relobj_file<size, big_endian>(name, input_file, offset, ehdr), | |
590b87ff AM |
98 | uniq_(object_id++), special_(0), relatoc_(0), toc_(0), |
99 | has_small_toc_reloc_(false), opd_valid_(false), | |
100 | e_flags_(ehdr.get_e_flags()), no_toc_opt_(), opd_ent_(), | |
101 | access_from_map_(), has14_(), stub_table_index_(), st_other_() | |
b4f7960d AM |
102 | { |
103 | this->set_abiversion(0); | |
104 | } | |
cf43a2fe AM |
105 | |
106 | ~Powerpc_relobj() | |
107 | { } | |
108 | ||
b4f7960d AM |
109 | // Read the symbols then set up st_other vector. |
110 | void | |
111 | do_read_symbols(Read_symbols_data*); | |
112 | ||
5edad15d AM |
113 | // Arrange to always relocate .toc first. |
114 | virtual void | |
115 | do_relocate_sections( | |
116 | const Symbol_table* symtab, const Layout* layout, | |
117 | const unsigned char* pshdrs, Output_file* of, | |
118 | typename Sized_relobj_file<size, big_endian>::Views* pviews); | |
119 | ||
120 | // The .toc section index. | |
121 | unsigned int | |
122 | toc_shndx() const | |
123 | { | |
124 | return this->toc_; | |
125 | } | |
126 | ||
127 | // Mark .toc entry at OFF as not optimizable. | |
128 | void | |
129 | set_no_toc_opt(Address off) | |
130 | { | |
131 | if (this->no_toc_opt_.empty()) | |
132 | this->no_toc_opt_.resize(this->section_size(this->toc_shndx()) | |
133 | / (size / 8)); | |
134 | off /= size / 8; | |
135 | if (off < this->no_toc_opt_.size()) | |
136 | this->no_toc_opt_[off] = true; | |
137 | } | |
138 | ||
139 | // Mark the entire .toc as not optimizable. | |
140 | void | |
141 | set_no_toc_opt() | |
142 | { | |
143 | this->no_toc_opt_.resize(1); | |
144 | this->no_toc_opt_[0] = true; | |
145 | } | |
146 | ||
147 | // Return true if code using the .toc entry at OFF should not be edited. | |
148 | bool | |
149 | no_toc_opt(Address off) const | |
150 | { | |
151 | if (this->no_toc_opt_.empty()) | |
152 | return false; | |
153 | off /= size / 8; | |
154 | if (off >= this->no_toc_opt_.size()) | |
155 | return true; | |
156 | return this->no_toc_opt_[off]; | |
157 | } | |
158 | ||
c9269dff | 159 | // The .got2 section shndx. |
cf43a2fe AM |
160 | unsigned int |
161 | got2_shndx() const | |
162 | { | |
163 | if (size == 32) | |
c9269dff | 164 | return this->special_; |
cf43a2fe AM |
165 | else |
166 | return 0; | |
167 | } | |
168 | ||
c9269dff AM |
169 | // The .opd section shndx. |
170 | unsigned int | |
171 | opd_shndx() const | |
172 | { | |
173 | if (size == 32) | |
174 | return 0; | |
175 | else | |
176 | return this->special_; | |
177 | } | |
178 | ||
179 | // Init OPD entry arrays. | |
180 | void | |
181 | init_opd(size_t opd_size) | |
182 | { | |
183 | size_t count = this->opd_ent_ndx(opd_size); | |
bfdfa4cd | 184 | this->opd_ent_.resize(count); |
c9269dff AM |
185 | } |
186 | ||
187 | // Return section and offset of function entry for .opd + R_OFF. | |
e81fea4d AM |
188 | unsigned int |
189 | get_opd_ent(Address r_off, Address* value = NULL) const | |
c9269dff AM |
190 | { |
191 | size_t ndx = this->opd_ent_ndx(r_off); | |
bfdfa4cd AM |
192 | gold_assert(ndx < this->opd_ent_.size()); |
193 | gold_assert(this->opd_ent_[ndx].shndx != 0); | |
e81fea4d | 194 | if (value != NULL) |
bfdfa4cd AM |
195 | *value = this->opd_ent_[ndx].off; |
196 | return this->opd_ent_[ndx].shndx; | |
c9269dff AM |
197 | } |
198 | ||
199 | // Set section and offset of function entry for .opd + R_OFF. | |
200 | void | |
dd93cd0a | 201 | set_opd_ent(Address r_off, unsigned int shndx, Address value) |
c9269dff AM |
202 | { |
203 | size_t ndx = this->opd_ent_ndx(r_off); | |
bfdfa4cd AM |
204 | gold_assert(ndx < this->opd_ent_.size()); |
205 | this->opd_ent_[ndx].shndx = shndx; | |
206 | this->opd_ent_[ndx].off = value; | |
207 | } | |
208 | ||
209 | // Return discard flag for .opd + R_OFF. | |
210 | bool | |
211 | get_opd_discard(Address r_off) const | |
212 | { | |
213 | size_t ndx = this->opd_ent_ndx(r_off); | |
214 | gold_assert(ndx < this->opd_ent_.size()); | |
215 | return this->opd_ent_[ndx].discard; | |
216 | } | |
217 | ||
218 | // Set discard flag for .opd + R_OFF. | |
219 | void | |
220 | set_opd_discard(Address r_off) | |
221 | { | |
222 | size_t ndx = this->opd_ent_ndx(r_off); | |
223 | gold_assert(ndx < this->opd_ent_.size()); | |
224 | this->opd_ent_[ndx].discard = true; | |
c9269dff AM |
225 | } |
226 | ||
e81fea4d AM |
227 | bool |
228 | opd_valid() const | |
229 | { return this->opd_valid_; } | |
230 | ||
231 | void | |
232 | set_opd_valid() | |
233 | { this->opd_valid_ = true; } | |
234 | ||
c9269dff AM |
235 | // Examine .rela.opd to build info about function entry points. |
236 | void | |
237 | scan_opd_relocs(size_t reloc_count, | |
238 | const unsigned char* prelocs, | |
239 | const unsigned char* plocal_syms); | |
240 | ||
5edad15d AM |
241 | // Returns true if a code sequence loading a TOC entry can be |
242 | // converted into code calculating a TOC pointer relative offset. | |
243 | bool | |
244 | make_toc_relative(Target_powerpc<size, big_endian>* target, | |
245 | Address* value); | |
246 | ||
26a4e9cb AM |
247 | // Perform the Sized_relobj_file method, then set up opd info from |
248 | // .opd relocs. | |
c9269dff AM |
249 | void |
250 | do_read_relocs(Read_relocs_data*); | |
251 | ||
cf43a2fe AM |
252 | bool |
253 | do_find_special_sections(Read_symbols_data* sd); | |
254 | ||
ec4dbad3 AM |
255 | // Adjust this local symbol value. Return false if the symbol |
256 | // should be discarded from the output file. | |
257 | bool | |
258 | do_adjust_local_symbol(Symbol_value<size>* lv) const | |
259 | { | |
260 | if (size == 64 && this->opd_shndx() != 0) | |
261 | { | |
262 | bool is_ordinary; | |
263 | if (lv->input_shndx(&is_ordinary) != this->opd_shndx()) | |
264 | return true; | |
265 | if (this->get_opd_discard(lv->input_value())) | |
266 | return false; | |
267 | } | |
268 | return true; | |
269 | } | |
270 | ||
6c77229c AM |
271 | Access_from* |
272 | access_from_map() | |
273 | { return &this->access_from_map_; } | |
274 | ||
275 | // Add a reference from SRC_OBJ, SRC_INDX to this object's .opd | |
276 | // section at DST_OFF. | |
277 | void | |
efc6fa12 | 278 | add_reference(Relobj* src_obj, |
6c77229c AM |
279 | unsigned int src_indx, |
280 | typename elfcpp::Elf_types<size>::Elf_Addr dst_off) | |
281 | { | |
282 | Section_id src_id(src_obj, src_indx); | |
283 | this->access_from_map_[dst_off].insert(src_id); | |
284 | } | |
285 | ||
286 | // Add a reference to the code section specified by the .opd entry | |
287 | // at DST_OFF | |
288 | void | |
289 | add_gc_mark(typename elfcpp::Elf_types<size>::Elf_Addr dst_off) | |
290 | { | |
291 | size_t ndx = this->opd_ent_ndx(dst_off); | |
292 | if (ndx >= this->opd_ent_.size()) | |
293 | this->opd_ent_.resize(ndx + 1); | |
294 | this->opd_ent_[ndx].gc_mark = true; | |
295 | } | |
296 | ||
297 | void | |
298 | process_gc_mark(Symbol_table* symtab) | |
299 | { | |
300 | for (size_t i = 0; i < this->opd_ent_.size(); i++) | |
301 | if (this->opd_ent_[i].gc_mark) | |
302 | { | |
303 | unsigned int shndx = this->opd_ent_[i].shndx; | |
4277535c | 304 | symtab->gc()->worklist().push_back(Section_id(this, shndx)); |
6c77229c AM |
305 | } |
306 | } | |
307 | ||
dd93cd0a AM |
308 | // Return offset in output GOT section that this object will use |
309 | // as a TOC pointer. Won't be just a constant with multi-toc support. | |
310 | Address | |
311 | toc_base_offset() const | |
312 | { return 0x8000; } | |
313 | ||
d8f5a274 AM |
314 | void |
315 | set_has_small_toc_reloc() | |
316 | { has_small_toc_reloc_ = true; } | |
317 | ||
318 | bool | |
319 | has_small_toc_reloc() const | |
320 | { return has_small_toc_reloc_; } | |
321 | ||
ec661b9d AM |
322 | void |
323 | set_has_14bit_branch(unsigned int shndx) | |
324 | { | |
325 | if (shndx >= this->has14_.size()) | |
326 | this->has14_.resize(shndx + 1); | |
327 | this->has14_[shndx] = true; | |
328 | } | |
329 | ||
330 | bool | |
331 | has_14bit_branch(unsigned int shndx) const | |
332 | { return shndx < this->has14_.size() && this->has14_[shndx]; } | |
333 | ||
334 | void | |
a3e60ddb | 335 | set_stub_table(unsigned int shndx, unsigned int stub_index) |
ec661b9d | 336 | { |
a3e60ddb | 337 | if (shndx >= this->stub_table_index_.size()) |
dc60b26d | 338 | this->stub_table_index_.resize(shndx + 1, -1); |
a3e60ddb | 339 | this->stub_table_index_[shndx] = stub_index; |
ec661b9d AM |
340 | } |
341 | ||
342 | Stub_table<size, big_endian>* | |
343 | stub_table(unsigned int shndx) | |
344 | { | |
a3e60ddb AM |
345 | if (shndx < this->stub_table_index_.size()) |
346 | { | |
347 | Target_powerpc<size, big_endian>* target | |
348 | = static_cast<Target_powerpc<size, big_endian>*>( | |
349 | parameters->sized_target<size, big_endian>()); | |
350 | unsigned int indx = this->stub_table_index_[shndx]; | |
980d0cdd AM |
351 | if (indx < target->stub_tables().size()) |
352 | return target->stub_tables()[indx]; | |
a3e60ddb | 353 | } |
ec661b9d AM |
354 | return NULL; |
355 | } | |
356 | ||
a3e60ddb AM |
357 | void |
358 | clear_stub_table() | |
359 | { | |
360 | this->stub_table_index_.clear(); | |
361 | } | |
362 | ||
590b87ff AM |
363 | uint32_t |
364 | uniq() const | |
365 | { return this->uniq_; } | |
366 | ||
b4f7960d AM |
367 | int |
368 | abiversion() const | |
369 | { return this->e_flags_ & elfcpp::EF_PPC64_ABI; } | |
370 | ||
371 | // Set ABI version for input and output | |
372 | void | |
373 | set_abiversion(int ver); | |
374 | ||
375 | unsigned int | |
376 | ppc64_local_entry_offset(const Symbol* sym) const | |
377 | { return elfcpp::ppc64_decode_local_entry(sym->nonvis() >> 3); } | |
378 | ||
379 | unsigned int | |
380 | ppc64_local_entry_offset(unsigned int symndx) const | |
381 | { return elfcpp::ppc64_decode_local_entry(this->st_other_[symndx] >> 5); } | |
382 | ||
cf43a2fe | 383 | private: |
bfdfa4cd AM |
384 | struct Opd_ent |
385 | { | |
386 | unsigned int shndx; | |
c6de8ed4 AM |
387 | bool discard : 1; |
388 | bool gc_mark : 1; | |
26a4e9cb | 389 | Address off; |
bfdfa4cd AM |
390 | }; |
391 | ||
392 | // Return index into opd_ent_ array for .opd entry at OFF. | |
393 | // .opd entries are 24 bytes long, but they can be spaced 16 bytes | |
394 | // apart when the language doesn't use the last 8-byte word, the | |
395 | // environment pointer. Thus dividing the entry section offset by | |
396 | // 16 will give an index into opd_ent_ that works for either layout | |
397 | // of .opd. (It leaves some elements of the vector unused when .opd | |
398 | // entries are spaced 24 bytes apart, but we don't know the spacing | |
399 | // until relocations are processed, and in any case it is possible | |
400 | // for an object to have some entries spaced 16 bytes apart and | |
401 | // others 24 bytes apart.) | |
c9269dff AM |
402 | size_t |
403 | opd_ent_ndx(size_t off) const | |
404 | { return off >> 4;} | |
405 | ||
590b87ff AM |
406 | // Per object unique identifier |
407 | uint32_t uniq_; | |
408 | ||
c9269dff AM |
409 | // For 32-bit the .got2 section shdnx, for 64-bit the .opd section shndx. |
410 | unsigned int special_; | |
bfdfa4cd | 411 | |
5edad15d AM |
412 | // For 64-bit the .rela.toc and .toc section shdnx. |
413 | unsigned int relatoc_; | |
414 | unsigned int toc_; | |
415 | ||
d8f5a274 AM |
416 | // For 64-bit, whether this object uses small model relocs to access |
417 | // the toc. | |
418 | bool has_small_toc_reloc_; | |
419 | ||
bfdfa4cd AM |
420 | // Set at the start of gc_process_relocs, when we know opd_ent_ |
421 | // vector is valid. The flag could be made atomic and set in | |
422 | // do_read_relocs with memory_order_release and then tested with | |
423 | // memory_order_acquire, potentially resulting in fewer entries in | |
424 | // access_from_map_. | |
425 | bool opd_valid_; | |
426 | ||
590b87ff AM |
427 | // Header e_flags |
428 | elfcpp::Elf_Word e_flags_; | |
429 | ||
430 | // For 64-bit, an array with one entry per 64-bit word in the .toc | |
431 | // section, set if accesses using that word cannot be optimised. | |
432 | std::vector<bool> no_toc_opt_; | |
433 | ||
c9269dff AM |
434 | // The first 8-byte word of an OPD entry gives the address of the |
435 | // entry point of the function. Relocatable object files have a | |
bfdfa4cd | 436 | // relocation on this word. The following vector records the |
c9269dff | 437 | // section and offset specified by these relocations. |
bfdfa4cd AM |
438 | std::vector<Opd_ent> opd_ent_; |
439 | ||
e81fea4d | 440 | // References made to this object's .opd section when running |
bfdfa4cd AM |
441 | // gc_process_relocs for another object, before the opd_ent_ vector |
442 | // is valid for this object. | |
e81fea4d | 443 | Access_from access_from_map_; |
ec661b9d AM |
444 | |
445 | // Whether input section has a 14-bit branch reloc. | |
446 | std::vector<bool> has14_; | |
447 | ||
448 | // The stub table to use for a given input section. | |
a3e60ddb | 449 | std::vector<unsigned int> stub_table_index_; |
b4f7960d | 450 | |
b4f7960d AM |
451 | // ELF st_other field for local symbols. |
452 | std::vector<unsigned char> st_other_; | |
cf43a2fe AM |
453 | }; |
454 | ||
dc3714f3 AM |
455 | template<int size, bool big_endian> |
456 | class Powerpc_dynobj : public Sized_dynobj<size, big_endian> | |
457 | { | |
458 | public: | |
459 | typedef typename elfcpp::Elf_types<size>::Elf_Addr Address; | |
460 | ||
461 | Powerpc_dynobj(const std::string& name, Input_file* input_file, off_t offset, | |
462 | const typename elfcpp::Ehdr<size, big_endian>& ehdr) | |
463 | : Sized_dynobj<size, big_endian>(name, input_file, offset, ehdr), | |
590b87ff | 464 | opd_shndx_(0), e_flags_(ehdr.get_e_flags()), opd_ent_() |
b4f7960d AM |
465 | { |
466 | this->set_abiversion(0); | |
467 | } | |
dc3714f3 AM |
468 | |
469 | ~Powerpc_dynobj() | |
470 | { } | |
471 | ||
472 | // Call Sized_dynobj::do_read_symbols to read the symbols then | |
473 | // read .opd from a dynamic object, filling in opd_ent_ vector, | |
474 | void | |
475 | do_read_symbols(Read_symbols_data*); | |
476 | ||
477 | // The .opd section shndx. | |
478 | unsigned int | |
479 | opd_shndx() const | |
480 | { | |
481 | return this->opd_shndx_; | |
482 | } | |
483 | ||
484 | // The .opd section address. | |
485 | Address | |
486 | opd_address() const | |
487 | { | |
488 | return this->opd_address_; | |
489 | } | |
490 | ||
491 | // Init OPD entry arrays. | |
492 | void | |
493 | init_opd(size_t opd_size) | |
494 | { | |
495 | size_t count = this->opd_ent_ndx(opd_size); | |
496 | this->opd_ent_.resize(count); | |
497 | } | |
498 | ||
499 | // Return section and offset of function entry for .opd + R_OFF. | |
500 | unsigned int | |
501 | get_opd_ent(Address r_off, Address* value = NULL) const | |
502 | { | |
503 | size_t ndx = this->opd_ent_ndx(r_off); | |
504 | gold_assert(ndx < this->opd_ent_.size()); | |
505 | gold_assert(this->opd_ent_[ndx].shndx != 0); | |
506 | if (value != NULL) | |
507 | *value = this->opd_ent_[ndx].off; | |
508 | return this->opd_ent_[ndx].shndx; | |
509 | } | |
510 | ||
511 | // Set section and offset of function entry for .opd + R_OFF. | |
512 | void | |
513 | set_opd_ent(Address r_off, unsigned int shndx, Address value) | |
514 | { | |
515 | size_t ndx = this->opd_ent_ndx(r_off); | |
516 | gold_assert(ndx < this->opd_ent_.size()); | |
517 | this->opd_ent_[ndx].shndx = shndx; | |
518 | this->opd_ent_[ndx].off = value; | |
519 | } | |
520 | ||
b4f7960d AM |
521 | int |
522 | abiversion() const | |
523 | { return this->e_flags_ & elfcpp::EF_PPC64_ABI; } | |
524 | ||
525 | // Set ABI version for input and output. | |
526 | void | |
527 | set_abiversion(int ver); | |
528 | ||
dc3714f3 AM |
529 | private: |
530 | // Used to specify extent of executable sections. | |
531 | struct Sec_info | |
532 | { | |
533 | Sec_info(Address start_, Address len_, unsigned int shndx_) | |
534 | : start(start_), len(len_), shndx(shndx_) | |
535 | { } | |
536 | ||
537 | bool | |
538 | operator<(const Sec_info& that) const | |
539 | { return this->start < that.start; } | |
540 | ||
541 | Address start; | |
542 | Address len; | |
543 | unsigned int shndx; | |
544 | }; | |
545 | ||
546 | struct Opd_ent | |
547 | { | |
548 | unsigned int shndx; | |
549 | Address off; | |
550 | }; | |
551 | ||
552 | // Return index into opd_ent_ array for .opd entry at OFF. | |
553 | size_t | |
554 | opd_ent_ndx(size_t off) const | |
555 | { return off >> 4;} | |
556 | ||
557 | // For 64-bit the .opd section shndx and address. | |
558 | unsigned int opd_shndx_; | |
559 | Address opd_address_; | |
560 | ||
590b87ff AM |
561 | // Header e_flags |
562 | elfcpp::Elf_Word e_flags_; | |
563 | ||
dc3714f3 AM |
564 | // The first 8-byte word of an OPD entry gives the address of the |
565 | // entry point of the function. Records the section and offset | |
566 | // corresponding to the address. Note that in dynamic objects, | |
567 | // offset is *not* relative to the section. | |
568 | std::vector<Opd_ent> opd_ent_; | |
569 | }; | |
570 | ||
5edad15d AM |
571 | // Powerpc_copy_relocs class. Needed to peek at dynamic relocs the |
572 | // base class will emit. | |
573 | ||
574 | template<int sh_type, int size, bool big_endian> | |
575 | class Powerpc_copy_relocs : public Copy_relocs<sh_type, size, big_endian> | |
576 | { | |
577 | public: | |
578 | Powerpc_copy_relocs() | |
579 | : Copy_relocs<sh_type, size, big_endian>(elfcpp::R_POWERPC_COPY) | |
580 | { } | |
581 | ||
582 | // Emit any saved relocations which turn out to be needed. This is | |
583 | // called after all the relocs have been scanned. | |
584 | void | |
585 | emit(Output_data_reloc<sh_type, true, size, big_endian>*); | |
586 | }; | |
587 | ||
42cacb20 DE |
588 | template<int size, bool big_endian> |
589 | class Target_powerpc : public Sized_target<size, big_endian> | |
590 | { | |
591 | public: | |
d83ce4e3 AM |
592 | typedef |
593 | Output_data_reloc<elfcpp::SHT_RELA, true, size, big_endian> Reloc_section; | |
c9269dff | 594 | typedef typename elfcpp::Elf_types<size>::Elf_Addr Address; |
dd93cd0a | 595 | typedef typename elfcpp::Elf_types<size>::Elf_Swxword Signed_address; |
7e57d19e | 596 | typedef Unordered_set<Symbol_location, Symbol_location_hash> Tocsave_loc; |
c9269dff | 597 | static const Address invalid_address = static_cast<Address>(0) - 1; |
dd93cd0a AM |
598 | // Offset of tp and dtp pointers from start of TLS block. |
599 | static const Address tp_offset = 0x7000; | |
600 | static const Address dtp_offset = 0x8000; | |
42cacb20 DE |
601 | |
602 | Target_powerpc() | |
603 | : Sized_target<size, big_endian>(&powerpc_info), | |
ec661b9d | 604 | got_(NULL), plt_(NULL), iplt_(NULL), brlt_section_(NULL), |
5edad15d | 605 | glink_(NULL), rela_dyn_(NULL), copy_relocs_(), |
43819297 | 606 | tlsld_got_offset_(-1U), |
7e57d19e | 607 | stub_tables_(), branch_lookup_table_(), branch_info_(), tocsave_loc_(), |
a3e60ddb | 608 | plt_thread_safe_(false), relax_failed_(false), relax_fail_count_(0), |
d49044c7 | 609 | stub_group_size_(0), savres_section_(0) |
42cacb20 DE |
610 | { |
611 | } | |
612 | ||
2e702c99 | 613 | // Process the relocations to determine unreferenced sections for |
6d03d481 ST |
614 | // garbage collection. |
615 | void | |
ad0f2072 | 616 | gc_process_relocs(Symbol_table* symtab, |
2e702c99 RM |
617 | Layout* layout, |
618 | Sized_relobj_file<size, big_endian>* object, | |
619 | unsigned int data_shndx, | |
620 | unsigned int sh_type, | |
621 | const unsigned char* prelocs, | |
622 | size_t reloc_count, | |
623 | Output_section* output_section, | |
624 | bool needs_special_offset_handling, | |
625 | size_t local_symbol_count, | |
626 | const unsigned char* plocal_symbols); | |
6d03d481 | 627 | |
42cacb20 DE |
628 | // Scan the relocations to look for symbol adjustments. |
629 | void | |
ad0f2072 | 630 | scan_relocs(Symbol_table* symtab, |
42cacb20 | 631 | Layout* layout, |
6fa2a40b | 632 | Sized_relobj_file<size, big_endian>* object, |
42cacb20 DE |
633 | unsigned int data_shndx, |
634 | unsigned int sh_type, | |
635 | const unsigned char* prelocs, | |
636 | size_t reloc_count, | |
637 | Output_section* output_section, | |
638 | bool needs_special_offset_handling, | |
639 | size_t local_symbol_count, | |
640 | const unsigned char* plocal_symbols); | |
921b5322 AM |
641 | |
642 | // Map input .toc section to output .got section. | |
643 | const char* | |
644 | do_output_section_name(const Relobj*, const char* name, size_t* plen) const | |
645 | { | |
646 | if (size == 64 && strcmp(name, ".toc") == 0) | |
647 | { | |
648 | *plen = 4; | |
649 | return ".got"; | |
650 | } | |
651 | return NULL; | |
652 | } | |
653 | ||
f3a0ed29 AM |
654 | // Provide linker defined save/restore functions. |
655 | void | |
656 | define_save_restore_funcs(Layout*, Symbol_table*); | |
657 | ||
ec661b9d AM |
658 | // No stubs unless a final link. |
659 | bool | |
660 | do_may_relax() const | |
661 | { return !parameters->options().relocatable(); } | |
662 | ||
663 | bool | |
664 | do_relax(int, const Input_objects*, Symbol_table*, Layout*, const Task*); | |
665 | ||
9d5781f8 AM |
666 | void |
667 | do_plt_fde_location(const Output_data*, unsigned char*, | |
668 | uint64_t*, off_t*) const; | |
669 | ||
ec661b9d AM |
670 | // Stash info about branches, for stub generation. |
671 | void | |
672 | push_branch(Powerpc_relobj<size, big_endian>* ppc_object, | |
673 | unsigned int data_shndx, Address r_offset, | |
674 | unsigned int r_type, unsigned int r_sym, Address addend) | |
675 | { | |
676 | Branch_info info(ppc_object, data_shndx, r_offset, r_type, r_sym, addend); | |
677 | this->branch_info_.push_back(info); | |
678 | if (r_type == elfcpp::R_POWERPC_REL14 | |
679 | || r_type == elfcpp::R_POWERPC_REL14_BRTAKEN | |
680 | || r_type == elfcpp::R_POWERPC_REL14_BRNTAKEN) | |
681 | ppc_object->set_has_14bit_branch(data_shndx); | |
682 | } | |
683 | ||
7e57d19e AM |
684 | // Return whether the last branch is a plt call, and if so, mark the |
685 | // branch as having an R_PPC64_TOCSAVE. | |
686 | bool | |
687 | mark_pltcall(Powerpc_relobj<size, big_endian>* ppc_object, | |
688 | unsigned int data_shndx, Address r_offset, Symbol_table* symtab) | |
689 | { | |
690 | return (size == 64 | |
691 | && !this->branch_info_.empty() | |
692 | && this->branch_info_.back().mark_pltcall(ppc_object, data_shndx, | |
693 | r_offset, this, symtab)); | |
694 | } | |
695 | ||
696 | // Say the given location, that of a nop in a function prologue with | |
697 | // an R_PPC64_TOCSAVE reloc, will be used to save r2. | |
698 | // R_PPC64_TOCSAVE relocs on nops following calls point at this nop. | |
699 | void | |
700 | add_tocsave(Powerpc_relobj<size, big_endian>* ppc_object, | |
701 | unsigned int shndx, Address offset) | |
702 | { | |
703 | Symbol_location loc; | |
704 | loc.object = ppc_object; | |
705 | loc.shndx = shndx; | |
706 | loc.offset = offset; | |
707 | this->tocsave_loc_.insert(loc); | |
708 | } | |
709 | ||
710 | // Accessor | |
711 | const Tocsave_loc | |
712 | tocsave_loc() const | |
713 | { | |
714 | return this->tocsave_loc_; | |
715 | } | |
716 | ||
f43ba157 AM |
717 | void |
718 | do_define_standard_symbols(Symbol_table*, Layout*); | |
719 | ||
42cacb20 DE |
720 | // Finalize the sections. |
721 | void | |
f59f41f3 | 722 | do_finalize_sections(Layout*, const Input_objects*, Symbol_table*); |
42cacb20 DE |
723 | |
724 | // Return the value to use for a dynamic which requires special | |
725 | // treatment. | |
726 | uint64_t | |
727 | do_dynsym_value(const Symbol*) const; | |
728 | ||
c9824451 AM |
729 | // Return the PLT address to use for a local symbol. |
730 | uint64_t | |
731 | do_plt_address_for_local(const Relobj*, unsigned int) const; | |
732 | ||
733 | // Return the PLT address to use for a global symbol. | |
734 | uint64_t | |
735 | do_plt_address_for_global(const Symbol*) const; | |
736 | ||
bd73a62d AM |
737 | // Return the offset to use for the GOT_INDX'th got entry which is |
738 | // for a local tls symbol specified by OBJECT, SYMNDX. | |
739 | int64_t | |
740 | do_tls_offset_for_local(const Relobj* object, | |
741 | unsigned int symndx, | |
742 | unsigned int got_indx) const; | |
743 | ||
744 | // Return the offset to use for the GOT_INDX'th got entry which is | |
745 | // for global tls symbol GSYM. | |
746 | int64_t | |
747 | do_tls_offset_for_global(Symbol* gsym, unsigned int got_indx) const; | |
748 | ||
dc3714f3 AM |
749 | void |
750 | do_function_location(Symbol_location*) const; | |
751 | ||
4d9aa155 AM |
752 | bool |
753 | do_can_check_for_function_pointers() const | |
754 | { return true; } | |
755 | ||
bbec1a5d AM |
756 | // Adjust -fsplit-stack code which calls non-split-stack code. |
757 | void | |
758 | do_calls_non_split(Relobj* object, unsigned int shndx, | |
759 | section_offset_type fnoffset, section_size_type fnsize, | |
6e0813d3 | 760 | const unsigned char* prelocs, size_t reloc_count, |
bbec1a5d AM |
761 | unsigned char* view, section_size_type view_size, |
762 | std::string* from, std::string* to) const; | |
763 | ||
42cacb20 DE |
764 | // Relocate a section. |
765 | void | |
766 | relocate_section(const Relocate_info<size, big_endian>*, | |
767 | unsigned int sh_type, | |
768 | const unsigned char* prelocs, | |
769 | size_t reloc_count, | |
770 | Output_section* output_section, | |
771 | bool needs_special_offset_handling, | |
772 | unsigned char* view, | |
c9269dff | 773 | Address view_address, |
364c7fa5 ILT |
774 | section_size_type view_size, |
775 | const Reloc_symbol_changes*); | |
42cacb20 DE |
776 | |
777 | // Scan the relocs during a relocatable link. | |
778 | void | |
ad0f2072 | 779 | scan_relocatable_relocs(Symbol_table* symtab, |
42cacb20 | 780 | Layout* layout, |
6fa2a40b | 781 | Sized_relobj_file<size, big_endian>* object, |
42cacb20 DE |
782 | unsigned int data_shndx, |
783 | unsigned int sh_type, | |
784 | const unsigned char* prelocs, | |
785 | size_t reloc_count, | |
786 | Output_section* output_section, | |
787 | bool needs_special_offset_handling, | |
788 | size_t local_symbol_count, | |
789 | const unsigned char* plocal_symbols, | |
790 | Relocatable_relocs*); | |
791 | ||
4d625b70 CC |
792 | // Scan the relocs for --emit-relocs. |
793 | void | |
794 | emit_relocs_scan(Symbol_table* symtab, | |
795 | Layout* layout, | |
796 | Sized_relobj_file<size, big_endian>* object, | |
797 | unsigned int data_shndx, | |
798 | unsigned int sh_type, | |
799 | const unsigned char* prelocs, | |
800 | size_t reloc_count, | |
801 | Output_section* output_section, | |
802 | bool needs_special_offset_handling, | |
803 | size_t local_symbol_count, | |
804 | const unsigned char* plocal_syms, | |
805 | Relocatable_relocs* rr); | |
806 | ||
7404fe1b | 807 | // Emit relocations for a section. |
42cacb20 | 808 | void |
7404fe1b AM |
809 | relocate_relocs(const Relocate_info<size, big_endian>*, |
810 | unsigned int sh_type, | |
811 | const unsigned char* prelocs, | |
812 | size_t reloc_count, | |
813 | Output_section* output_section, | |
62fe925a RM |
814 | typename elfcpp::Elf_types<size>::Elf_Off |
815 | offset_in_output_section, | |
7404fe1b AM |
816 | unsigned char*, |
817 | Address view_address, | |
818 | section_size_type, | |
819 | unsigned char* reloc_view, | |
820 | section_size_type reloc_view_size); | |
42cacb20 DE |
821 | |
822 | // Return whether SYM is defined by the ABI. | |
823 | bool | |
9c2d0ef9 | 824 | do_is_defined_by_abi(const Symbol* sym) const |
42cacb20 | 825 | { |
cf43a2fe | 826 | return strcmp(sym->name(), "__tls_get_addr") == 0; |
42cacb20 DE |
827 | } |
828 | ||
829 | // Return the size of the GOT section. | |
830 | section_size_type | |
0e70b911 | 831 | got_size() const |
42cacb20 DE |
832 | { |
833 | gold_assert(this->got_ != NULL); | |
834 | return this->got_->data_size(); | |
835 | } | |
836 | ||
cf43a2fe AM |
837 | // Get the PLT section. |
838 | const Output_data_plt_powerpc<size, big_endian>* | |
839 | plt_section() const | |
840 | { | |
841 | gold_assert(this->plt_ != NULL); | |
842 | return this->plt_; | |
843 | } | |
844 | ||
e5d5f5ed AM |
845 | // Get the IPLT section. |
846 | const Output_data_plt_powerpc<size, big_endian>* | |
847 | iplt_section() const | |
848 | { | |
849 | gold_assert(this->iplt_ != NULL); | |
850 | return this->iplt_; | |
851 | } | |
852 | ||
cf43a2fe AM |
853 | // Get the .glink section. |
854 | const Output_data_glink<size, big_endian>* | |
855 | glink_section() const | |
856 | { | |
857 | gold_assert(this->glink_ != NULL); | |
858 | return this->glink_; | |
859 | } | |
860 | ||
9055360d AM |
861 | Output_data_glink<size, big_endian>* |
862 | glink_section() | |
863 | { | |
864 | gold_assert(this->glink_ != NULL); | |
865 | return this->glink_; | |
866 | } | |
867 | ||
9d5781f8 AM |
868 | bool has_glink() const |
869 | { return this->glink_ != NULL; } | |
870 | ||
cf43a2fe AM |
871 | // Get the GOT section. |
872 | const Output_data_got_powerpc<size, big_endian>* | |
873 | got_section() const | |
874 | { | |
875 | gold_assert(this->got_ != NULL); | |
876 | return this->got_; | |
877 | } | |
878 | ||
26a4e9cb AM |
879 | // Get the GOT section, creating it if necessary. |
880 | Output_data_got_powerpc<size, big_endian>* | |
881 | got_section(Symbol_table*, Layout*); | |
882 | ||
cf43a2fe AM |
883 | Object* |
884 | do_make_elf_object(const std::string&, Input_file*, off_t, | |
885 | const elfcpp::Ehdr<size, big_endian>&); | |
886 | ||
0e70b911 CC |
887 | // Return the number of entries in the GOT. |
888 | unsigned int | |
889 | got_entry_count() const | |
890 | { | |
891 | if (this->got_ == NULL) | |
892 | return 0; | |
893 | return this->got_size() / (size / 8); | |
894 | } | |
895 | ||
896 | // Return the number of entries in the PLT. | |
897 | unsigned int | |
898 | plt_entry_count() const; | |
899 | ||
900 | // Return the offset of the first non-reserved PLT entry. | |
901 | unsigned int | |
b4f7960d AM |
902 | first_plt_entry_offset() const |
903 | { | |
904 | if (size == 32) | |
905 | return 0; | |
906 | if (this->abiversion() >= 2) | |
907 | return 16; | |
908 | return 24; | |
909 | } | |
0e70b911 CC |
910 | |
911 | // Return the size of each PLT entry. | |
912 | unsigned int | |
b4f7960d AM |
913 | plt_entry_size() const |
914 | { | |
915 | if (size == 32) | |
916 | return 4; | |
917 | if (this->abiversion() >= 2) | |
918 | return 8; | |
919 | return 24; | |
920 | } | |
0e70b911 | 921 | |
d49044c7 AM |
922 | Output_data_save_res<size, big_endian>* |
923 | savres_section() const | |
924 | { | |
925 | return this->savres_section_; | |
926 | } | |
927 | ||
e81fea4d AM |
928 | // Add any special sections for this symbol to the gc work list. |
929 | // For powerpc64, this adds the code section of a function | |
930 | // descriptor. | |
931 | void | |
932 | do_gc_mark_symbol(Symbol_table* symtab, Symbol* sym) const; | |
933 | ||
934 | // Handle target specific gc actions when adding a gc reference from | |
935 | // SRC_OBJ, SRC_SHNDX to a location specified by DST_OBJ, DST_SHNDX | |
936 | // and DST_OFF. For powerpc64, this adds a referenc to the code | |
937 | // section of a function descriptor. | |
938 | void | |
939 | do_gc_add_reference(Symbol_table* symtab, | |
efc6fa12 | 940 | Relobj* src_obj, |
e81fea4d | 941 | unsigned int src_shndx, |
efc6fa12 | 942 | Relobj* dst_obj, |
e81fea4d AM |
943 | unsigned int dst_shndx, |
944 | Address dst_off) const; | |
945 | ||
ec661b9d AM |
946 | typedef std::vector<Stub_table<size, big_endian>*> Stub_tables; |
947 | const Stub_tables& | |
948 | stub_tables() const | |
949 | { return this->stub_tables_; } | |
950 | ||
951 | const Output_data_brlt_powerpc<size, big_endian>* | |
952 | brlt_section() const | |
953 | { return this->brlt_section_; } | |
954 | ||
955 | void | |
956 | add_branch_lookup_table(Address to) | |
957 | { | |
958 | unsigned int off = this->branch_lookup_table_.size() * (size / 8); | |
959 | this->branch_lookup_table_.insert(std::make_pair(to, off)); | |
960 | } | |
961 | ||
962 | Address | |
963 | find_branch_lookup_table(Address to) | |
964 | { | |
965 | typename Branch_lookup_table::const_iterator p | |
966 | = this->branch_lookup_table_.find(to); | |
967 | return p == this->branch_lookup_table_.end() ? invalid_address : p->second; | |
968 | } | |
969 | ||
970 | void | |
971 | write_branch_lookup_table(unsigned char *oview) | |
972 | { | |
973 | for (typename Branch_lookup_table::const_iterator p | |
974 | = this->branch_lookup_table_.begin(); | |
975 | p != this->branch_lookup_table_.end(); | |
976 | ++p) | |
977 | { | |
4d5effb9 | 978 | elfcpp::Swap<size, big_endian>::writeval(oview + p->second, p->first); |
ec661b9d AM |
979 | } |
980 | } | |
981 | ||
590b87ff AM |
982 | // Wrapper used after relax to define a local symbol in output data, |
983 | // from the end if value < 0. | |
984 | void | |
985 | define_local(Symbol_table* symtab, const char* name, | |
986 | Output_data* od, Address value, unsigned int symsize) | |
987 | { | |
988 | Symbol* sym | |
989 | = symtab->define_in_output_data(name, NULL, Symbol_table::PREDEFINED, | |
990 | od, value, symsize, elfcpp::STT_NOTYPE, | |
991 | elfcpp::STB_LOCAL, elfcpp::STV_HIDDEN, 0, | |
992 | static_cast<Signed_address>(value) < 0, | |
993 | false); | |
994 | // We are creating this symbol late, so need to fix up things | |
995 | // done early in Layout::finalize. | |
996 | sym->set_dynsym_index(-1U); | |
997 | } | |
998 | ||
9e69ed50 AM |
999 | bool |
1000 | plt_thread_safe() const | |
1001 | { return this->plt_thread_safe_; } | |
1002 | ||
b4f7960d AM |
1003 | int |
1004 | abiversion () const | |
1005 | { return this->processor_specific_flags() & elfcpp::EF_PPC64_ABI; } | |
1006 | ||
1007 | void | |
1008 | set_abiversion (int ver) | |
1009 | { | |
1010 | elfcpp::Elf_Word flags = this->processor_specific_flags(); | |
1011 | flags &= ~elfcpp::EF_PPC64_ABI; | |
1012 | flags |= ver & elfcpp::EF_PPC64_ABI; | |
1013 | this->set_processor_specific_flags(flags); | |
1014 | } | |
1015 | ||
1016 | // Offset to to save stack slot | |
1017 | int | |
1018 | stk_toc () const | |
1019 | { return this->abiversion() < 2 ? 40 : 24; } | |
1020 | ||
42cacb20 DE |
1021 | private: |
1022 | ||
e3deeb9c AM |
1023 | class Track_tls |
1024 | { | |
1025 | public: | |
1026 | enum Tls_get_addr | |
1027 | { | |
1028 | NOT_EXPECTED = 0, | |
1029 | EXPECTED = 1, | |
1030 | SKIP = 2, | |
1031 | NORMAL = 3 | |
1032 | }; | |
1033 | ||
1034 | Track_tls() | |
1035 | : tls_get_addr_(NOT_EXPECTED), | |
1036 | relinfo_(NULL), relnum_(0), r_offset_(0) | |
1037 | { } | |
1038 | ||
1039 | ~Track_tls() | |
1040 | { | |
1041 | if (this->tls_get_addr_ != NOT_EXPECTED) | |
1042 | this->missing(); | |
1043 | } | |
1044 | ||
1045 | void | |
1046 | missing(void) | |
1047 | { | |
1048 | if (this->relinfo_ != NULL) | |
1049 | gold_error_at_location(this->relinfo_, this->relnum_, this->r_offset_, | |
1050 | _("missing expected __tls_get_addr call")); | |
1051 | } | |
1052 | ||
1053 | void | |
1054 | expect_tls_get_addr_call( | |
1055 | const Relocate_info<size, big_endian>* relinfo, | |
1056 | size_t relnum, | |
1057 | Address r_offset) | |
1058 | { | |
1059 | this->tls_get_addr_ = EXPECTED; | |
1060 | this->relinfo_ = relinfo; | |
1061 | this->relnum_ = relnum; | |
1062 | this->r_offset_ = r_offset; | |
1063 | } | |
1064 | ||
1065 | void | |
1066 | expect_tls_get_addr_call() | |
1067 | { this->tls_get_addr_ = EXPECTED; } | |
1068 | ||
1069 | void | |
1070 | skip_next_tls_get_addr_call() | |
1071 | {this->tls_get_addr_ = SKIP; } | |
1072 | ||
1073 | Tls_get_addr | |
1074 | maybe_skip_tls_get_addr_call(unsigned int r_type, const Symbol* gsym) | |
1075 | { | |
1076 | bool is_tls_call = ((r_type == elfcpp::R_POWERPC_REL24 | |
1077 | || r_type == elfcpp::R_PPC_PLTREL24) | |
1078 | && gsym != NULL | |
1079 | && strcmp(gsym->name(), "__tls_get_addr") == 0); | |
1080 | Tls_get_addr last_tls = this->tls_get_addr_; | |
1081 | this->tls_get_addr_ = NOT_EXPECTED; | |
1082 | if (is_tls_call && last_tls != EXPECTED) | |
1083 | return last_tls; | |
1084 | else if (!is_tls_call && last_tls != NOT_EXPECTED) | |
1085 | { | |
1086 | this->missing(); | |
1087 | return EXPECTED; | |
1088 | } | |
1089 | return NORMAL; | |
1090 | } | |
1091 | ||
1092 | private: | |
1093 | // What we're up to regarding calls to __tls_get_addr. | |
1094 | // On powerpc, the branch and link insn making a call to | |
1095 | // __tls_get_addr is marked with a relocation, R_PPC64_TLSGD, | |
1096 | // R_PPC64_TLSLD, R_PPC_TLSGD or R_PPC_TLSLD, in addition to the | |
1097 | // usual R_POWERPC_REL24 or R_PPC_PLTREL25 relocation on a call. | |
1098 | // The marker relocation always comes first, and has the same | |
1099 | // symbol as the reloc on the insn setting up the __tls_get_addr | |
1100 | // argument. This ties the arg setup insn with the call insn, | |
1101 | // allowing ld to safely optimize away the call. We check that | |
1102 | // every call to __tls_get_addr has a marker relocation, and that | |
1103 | // every marker relocation is on a call to __tls_get_addr. | |
1104 | Tls_get_addr tls_get_addr_; | |
1105 | // Info about the last reloc for error message. | |
1106 | const Relocate_info<size, big_endian>* relinfo_; | |
1107 | size_t relnum_; | |
1108 | Address r_offset_; | |
1109 | }; | |
1110 | ||
42cacb20 | 1111 | // The class which scans relocations. |
e3deeb9c | 1112 | class Scan : protected Track_tls |
42cacb20 DE |
1113 | { |
1114 | public: | |
bfdfa4cd AM |
1115 | typedef typename elfcpp::Elf_types<size>::Elf_Addr Address; |
1116 | ||
42cacb20 | 1117 | Scan() |
e3deeb9c | 1118 | : Track_tls(), issued_non_pic_error_(false) |
42cacb20 DE |
1119 | { } |
1120 | ||
95a2c8d6 | 1121 | static inline int |
88b8e639 | 1122 | get_reference_flags(unsigned int r_type, const Target_powerpc* target); |
95a2c8d6 | 1123 | |
42cacb20 | 1124 | inline void |
ad0f2072 | 1125 | local(Symbol_table* symtab, Layout* layout, Target_powerpc* target, |
6fa2a40b | 1126 | Sized_relobj_file<size, big_endian>* object, |
42cacb20 DE |
1127 | unsigned int data_shndx, |
1128 | Output_section* output_section, | |
1129 | const elfcpp::Rela<size, big_endian>& reloc, unsigned int r_type, | |
bfdfa4cd AM |
1130 | const elfcpp::Sym<size, big_endian>& lsym, |
1131 | bool is_discarded); | |
42cacb20 DE |
1132 | |
1133 | inline void | |
ad0f2072 | 1134 | global(Symbol_table* symtab, Layout* layout, Target_powerpc* target, |
6fa2a40b | 1135 | Sized_relobj_file<size, big_endian>* object, |
42cacb20 DE |
1136 | unsigned int data_shndx, |
1137 | Output_section* output_section, | |
1138 | const elfcpp::Rela<size, big_endian>& reloc, unsigned int r_type, | |
1139 | Symbol* gsym); | |
1140 | ||
21bb3914 ST |
1141 | inline bool |
1142 | local_reloc_may_be_function_pointer(Symbol_table* , Layout* , | |
1143 | Target_powerpc* , | |
f6971787 | 1144 | Sized_relobj_file<size, big_endian>* relobj, |
21bb3914 | 1145 | unsigned int , |
2e702c99 RM |
1146 | Output_section* , |
1147 | const elfcpp::Rela<size, big_endian>& , | |
4d9aa155 | 1148 | unsigned int r_type, |
2e702c99 | 1149 | const elfcpp::Sym<size, big_endian>&) |
4d9aa155 AM |
1150 | { |
1151 | // PowerPC64 .opd is not folded, so any identical function text | |
1152 | // may be folded and we'll still keep function addresses distinct. | |
1153 | // That means no reloc is of concern here. | |
1154 | if (size == 64) | |
f6971787 AM |
1155 | { |
1156 | Powerpc_relobj<size, big_endian>* ppcobj = static_cast | |
1157 | <Powerpc_relobj<size, big_endian>*>(relobj); | |
1158 | if (ppcobj->abiversion() == 1) | |
1159 | return false; | |
1160 | } | |
1161 | // For 32-bit and ELFv2, conservatively assume anything but calls to | |
4d9aa155 AM |
1162 | // function code might be taking the address of the function. |
1163 | return !is_branch_reloc(r_type); | |
1164 | } | |
21bb3914 ST |
1165 | |
1166 | inline bool | |
1167 | global_reloc_may_be_function_pointer(Symbol_table* , Layout* , | |
1168 | Target_powerpc* , | |
f6971787 | 1169 | Sized_relobj_file<size, big_endian>* relobj, |
2e702c99 RM |
1170 | unsigned int , |
1171 | Output_section* , | |
4d9aa155 AM |
1172 | const elfcpp::Rela<size, big_endian>& , |
1173 | unsigned int r_type, | |
1174 | Symbol*) | |
1175 | { | |
1176 | // As above. | |
1177 | if (size == 64) | |
f6971787 AM |
1178 | { |
1179 | Powerpc_relobj<size, big_endian>* ppcobj = static_cast | |
1180 | <Powerpc_relobj<size, big_endian>*>(relobj); | |
1181 | if (ppcobj->abiversion() == 1) | |
1182 | return false; | |
1183 | } | |
4d9aa155 AM |
1184 | return !is_branch_reloc(r_type); |
1185 | } | |
21bb3914 | 1186 | |
b3ccdeb5 | 1187 | static bool |
9055360d AM |
1188 | reloc_needs_plt_for_ifunc(Target_powerpc<size, big_endian>* target, |
1189 | Sized_relobj_file<size, big_endian>* object, | |
b3ccdeb5 AM |
1190 | unsigned int r_type, bool report_err); |
1191 | ||
42cacb20 DE |
1192 | private: |
1193 | static void | |
6fa2a40b | 1194 | unsupported_reloc_local(Sized_relobj_file<size, big_endian>*, |
42cacb20 DE |
1195 | unsigned int r_type); |
1196 | ||
1197 | static void | |
6fa2a40b | 1198 | unsupported_reloc_global(Sized_relobj_file<size, big_endian>*, |
42cacb20 DE |
1199 | unsigned int r_type, Symbol*); |
1200 | ||
1201 | static void | |
1202 | generate_tls_call(Symbol_table* symtab, Layout* layout, | |
1203 | Target_powerpc* target); | |
1204 | ||
1205 | void | |
1206 | check_non_pic(Relobj*, unsigned int r_type); | |
1207 | ||
1208 | // Whether we have issued an error about a non-PIC compilation. | |
1209 | bool issued_non_pic_error_; | |
1210 | }; | |
1211 | ||
1611bc4a AM |
1212 | bool |
1213 | symval_for_branch(const Symbol_table* symtab, | |
6c77229c | 1214 | const Sized_symbol<size>* gsym, |
3ea0a085 | 1215 | Powerpc_relobj<size, big_endian>* object, |
1611bc4a | 1216 | Address *value, unsigned int *dest_shndx); |
3ea0a085 | 1217 | |
42cacb20 | 1218 | // The class which implements relocation. |
e3deeb9c | 1219 | class Relocate : protected Track_tls |
42cacb20 DE |
1220 | { |
1221 | public: | |
dd93cd0a AM |
1222 | // Use 'at' branch hints when true, 'y' when false. |
1223 | // FIXME maybe: set this with an option. | |
1224 | static const bool is_isa_v2 = true; | |
1225 | ||
dd93cd0a | 1226 | Relocate() |
e3deeb9c | 1227 | : Track_tls() |
dd93cd0a AM |
1228 | { } |
1229 | ||
42cacb20 DE |
1230 | // Do a relocation. Return false if the caller should not issue |
1231 | // any warnings about this relocation. | |
1232 | inline bool | |
91a65d2f AM |
1233 | relocate(const Relocate_info<size, big_endian>*, unsigned int, |
1234 | Target_powerpc*, Output_section*, size_t, const unsigned char*, | |
1235 | const Sized_symbol<size>*, const Symbol_value<size>*, | |
1236 | unsigned char*, typename elfcpp::Elf_types<size>::Elf_Addr, | |
42cacb20 | 1237 | section_size_type); |
42cacb20 DE |
1238 | }; |
1239 | ||
168a4726 AM |
1240 | class Relocate_comdat_behavior |
1241 | { | |
1242 | public: | |
1243 | // Decide what the linker should do for relocations that refer to | |
1244 | // discarded comdat sections. | |
1245 | inline Comdat_behavior | |
1246 | get(const char* name) | |
1247 | { | |
1248 | gold::Default_comdat_behavior default_behavior; | |
1249 | Comdat_behavior ret = default_behavior.get(name); | |
1250 | if (ret == CB_WARNING) | |
1251 | { | |
1252 | if (size == 32 | |
1253 | && (strcmp(name, ".fixup") == 0 | |
1254 | || strcmp(name, ".got2") == 0)) | |
1255 | ret = CB_IGNORE; | |
1256 | if (size == 64 | |
1257 | && (strcmp(name, ".opd") == 0 | |
1258 | || strcmp(name, ".toc") == 0 | |
1259 | || strcmp(name, ".toc1") == 0)) | |
1260 | ret = CB_IGNORE; | |
1261 | } | |
1262 | return ret; | |
1263 | } | |
1264 | }; | |
1265 | ||
dd93cd0a AM |
1266 | // Optimize the TLS relocation type based on what we know about the |
1267 | // symbol. IS_FINAL is true if the final address of this symbol is | |
1268 | // known at link time. | |
1269 | ||
1270 | tls::Tls_optimization | |
1271 | optimize_tls_gd(bool is_final) | |
1272 | { | |
1273 | // If we are generating a shared library, then we can't do anything | |
1274 | // in the linker. | |
1275 | if (parameters->options().shared()) | |
1276 | return tls::TLSOPT_NONE; | |
1277 | ||
1278 | if (!is_final) | |
1279 | return tls::TLSOPT_TO_IE; | |
1280 | return tls::TLSOPT_TO_LE; | |
1281 | } | |
1282 | ||
1283 | tls::Tls_optimization | |
1284 | optimize_tls_ld() | |
1285 | { | |
1286 | if (parameters->options().shared()) | |
1287 | return tls::TLSOPT_NONE; | |
1288 | ||
1289 | return tls::TLSOPT_TO_LE; | |
1290 | } | |
1291 | ||
1292 | tls::Tls_optimization | |
1293 | optimize_tls_ie(bool is_final) | |
1294 | { | |
1295 | if (!is_final || parameters->options().shared()) | |
1296 | return tls::TLSOPT_NONE; | |
1297 | ||
1298 | return tls::TLSOPT_TO_LE; | |
1299 | } | |
cf43a2fe | 1300 | |
cf43a2fe AM |
1301 | // Create glink. |
1302 | void | |
1303 | make_glink_section(Layout*); | |
42cacb20 | 1304 | |
cf43a2fe AM |
1305 | // Create the PLT section. |
1306 | void | |
40b469d7 | 1307 | make_plt_section(Symbol_table*, Layout*); |
42cacb20 | 1308 | |
e5d5f5ed | 1309 | void |
40b469d7 | 1310 | make_iplt_section(Symbol_table*, Layout*); |
e5d5f5ed | 1311 | |
ec661b9d AM |
1312 | void |
1313 | make_brlt_section(Layout*); | |
1314 | ||
42cacb20 DE |
1315 | // Create a PLT entry for a global symbol. |
1316 | void | |
ec661b9d | 1317 | make_plt_entry(Symbol_table*, Layout*, Symbol*); |
e5d5f5ed AM |
1318 | |
1319 | // Create a PLT entry for a local IFUNC symbol. | |
1320 | void | |
40b469d7 | 1321 | make_local_ifunc_plt_entry(Symbol_table*, Layout*, |
ec661b9d AM |
1322 | Sized_relobj_file<size, big_endian>*, |
1323 | unsigned int); | |
1324 | ||
42cacb20 | 1325 | |
dd93cd0a AM |
1326 | // Create a GOT entry for local dynamic __tls_get_addr. |
1327 | unsigned int | |
1328 | tlsld_got_offset(Symbol_table* symtab, Layout* layout, | |
1329 | Sized_relobj_file<size, big_endian>* object); | |
1330 | ||
42cacb20 | 1331 | unsigned int |
dd93cd0a AM |
1332 | tlsld_got_offset() const |
1333 | { | |
1334 | return this->tlsld_got_offset_; | |
1335 | } | |
42cacb20 | 1336 | |
42cacb20 DE |
1337 | // Get the dynamic reloc section, creating it if necessary. |
1338 | Reloc_section* | |
1339 | rela_dyn_section(Layout*); | |
1340 | ||
b3ccdeb5 AM |
1341 | // Similarly, but for ifunc symbols get the one for ifunc. |
1342 | Reloc_section* | |
1343 | rela_dyn_section(Symbol_table*, Layout*, bool for_ifunc); | |
1344 | ||
42cacb20 DE |
1345 | // Copy a relocation against a global symbol. |
1346 | void | |
ef9beddf | 1347 | copy_reloc(Symbol_table* symtab, Layout* layout, |
2e702c99 | 1348 | Sized_relobj_file<size, big_endian>* object, |
42cacb20 DE |
1349 | unsigned int shndx, Output_section* output_section, |
1350 | Symbol* sym, const elfcpp::Rela<size, big_endian>& reloc) | |
1351 | { | |
859d7987 | 1352 | unsigned int r_type = elfcpp::elf_r_type<size>(reloc.get_r_info()); |
42cacb20 DE |
1353 | this->copy_relocs_.copy_reloc(symtab, layout, |
1354 | symtab->get_sized_symbol<size>(sym), | |
1355 | object, shndx, output_section, | |
859d7987 CC |
1356 | r_type, reloc.get_r_offset(), |
1357 | reloc.get_r_addend(), | |
1358 | this->rela_dyn_section(layout)); | |
42cacb20 DE |
1359 | } |
1360 | ||
0cfdc767 | 1361 | // Look over all the input sections, deciding where to place stubs. |
ec661b9d | 1362 | void |
a3e60ddb | 1363 | group_sections(Layout*, const Task*, bool); |
ec661b9d AM |
1364 | |
1365 | // Sort output sections by address. | |
1366 | struct Sort_sections | |
1367 | { | |
1368 | bool | |
1369 | operator()(const Output_section* sec1, const Output_section* sec2) | |
1370 | { return sec1->address() < sec2->address(); } | |
1371 | }; | |
1372 | ||
1373 | class Branch_info | |
1374 | { | |
1375 | public: | |
1376 | Branch_info(Powerpc_relobj<size, big_endian>* ppc_object, | |
1377 | unsigned int data_shndx, | |
1378 | Address r_offset, | |
1379 | unsigned int r_type, | |
1380 | unsigned int r_sym, | |
1381 | Address addend) | |
1382 | : object_(ppc_object), shndx_(data_shndx), offset_(r_offset), | |
7e57d19e | 1383 | r_type_(r_type), tocsave_ (0), r_sym_(r_sym), addend_(addend) |
ec661b9d AM |
1384 | { } |
1385 | ||
1386 | ~Branch_info() | |
1387 | { } | |
1388 | ||
7e57d19e AM |
1389 | // Return whether this branch is going via a plt call stub, and if |
1390 | // so, mark it as having an R_PPC64_TOCSAVE. | |
1391 | bool | |
1392 | mark_pltcall(Powerpc_relobj<size, big_endian>* ppc_object, | |
1393 | unsigned int shndx, Address offset, | |
1394 | Target_powerpc* target, Symbol_table* symtab); | |
1395 | ||
ec661b9d | 1396 | // If this branch needs a plt call stub, or a long branch stub, make one. |
a3e60ddb | 1397 | bool |
ec661b9d AM |
1398 | make_stub(Stub_table<size, big_endian>*, |
1399 | Stub_table<size, big_endian>*, | |
1400 | Symbol_table*) const; | |
1401 | ||
1402 | private: | |
1403 | // The branch location.. | |
1404 | Powerpc_relobj<size, big_endian>* object_; | |
1405 | unsigned int shndx_; | |
1406 | Address offset_; | |
1407 | // ..and the branch type and destination. | |
7e57d19e AM |
1408 | unsigned int r_type_ : 31; |
1409 | unsigned int tocsave_ : 1; | |
ec661b9d AM |
1410 | unsigned int r_sym_; |
1411 | Address addend_; | |
1412 | }; | |
1413 | ||
42cacb20 DE |
1414 | // Information about this specific target which we pass to the |
1415 | // general Target structure. | |
1416 | static Target::Target_info powerpc_info; | |
1417 | ||
1418 | // The types of GOT entries needed for this platform. | |
0e70b911 CC |
1419 | // These values are exposed to the ABI in an incremental link. |
1420 | // Do not renumber existing values without changing the version | |
1421 | // number of the .gnu_incremental_inputs section. | |
42cacb20 DE |
1422 | enum Got_type |
1423 | { | |
dd93cd0a AM |
1424 | GOT_TYPE_STANDARD, |
1425 | GOT_TYPE_TLSGD, // double entry for @got@tlsgd | |
1426 | GOT_TYPE_DTPREL, // entry for @got@dtprel | |
1427 | GOT_TYPE_TPREL // entry for @got@tprel | |
42cacb20 DE |
1428 | }; |
1429 | ||
ec661b9d | 1430 | // The GOT section. |
cf43a2fe | 1431 | Output_data_got_powerpc<size, big_endian>* got_; |
b3ccdeb5 AM |
1432 | // The PLT section. This is a container for a table of addresses, |
1433 | // and their relocations. Each address in the PLT has a dynamic | |
1434 | // relocation (R_*_JMP_SLOT) and each address will have a | |
1435 | // corresponding entry in .glink for lazy resolution of the PLT. | |
1436 | // ppc32 initialises the PLT to point at the .glink entry, while | |
1437 | // ppc64 leaves this to ld.so. To make a call via the PLT, the | |
1438 | // linker adds a stub that loads the PLT entry into ctr then | |
1439 | // branches to ctr. There may be more than one stub for each PLT | |
1440 | // entry. DT_JMPREL points at the first PLT dynamic relocation and | |
1441 | // DT_PLTRELSZ gives the total size of PLT dynamic relocations. | |
42cacb20 | 1442 | Output_data_plt_powerpc<size, big_endian>* plt_; |
b3ccdeb5 AM |
1443 | // The IPLT section. Like plt_, this is a container for a table of |
1444 | // addresses and their relocations, specifically for STT_GNU_IFUNC | |
1445 | // functions that resolve locally (STT_GNU_IFUNC functions that | |
1446 | // don't resolve locally go in PLT). Unlike plt_, these have no | |
1447 | // entry in .glink for lazy resolution, and the relocation section | |
1448 | // does not have a 1-1 correspondence with IPLT addresses. In fact, | |
1449 | // the relocation section may contain relocations against | |
1450 | // STT_GNU_IFUNC symbols at locations outside of IPLT. The | |
1451 | // relocation section will appear at the end of other dynamic | |
1452 | // relocations, so that ld.so applies these relocations after other | |
1453 | // dynamic relocations. In a static executable, the relocation | |
1454 | // section is emitted and marked with __rela_iplt_start and | |
1455 | // __rela_iplt_end symbols. | |
e5d5f5ed | 1456 | Output_data_plt_powerpc<size, big_endian>* iplt_; |
ec661b9d AM |
1457 | // Section holding long branch destinations. |
1458 | Output_data_brlt_powerpc<size, big_endian>* brlt_section_; | |
1459 | // The .glink section. | |
cf43a2fe | 1460 | Output_data_glink<size, big_endian>* glink_; |
ec661b9d | 1461 | // The dynamic reloc section. |
42cacb20 DE |
1462 | Reloc_section* rela_dyn_; |
1463 | // Relocs saved to avoid a COPY reloc. | |
5edad15d | 1464 | Powerpc_copy_relocs<elfcpp::SHT_RELA, size, big_endian> copy_relocs_; |
dd93cd0a AM |
1465 | // Offset of the GOT entry for local dynamic __tls_get_addr calls. |
1466 | unsigned int tlsld_got_offset_; | |
ec661b9d AM |
1467 | |
1468 | Stub_tables stub_tables_; | |
1469 | typedef Unordered_map<Address, unsigned int> Branch_lookup_table; | |
1470 | Branch_lookup_table branch_lookup_table_; | |
1471 | ||
1472 | typedef std::vector<Branch_info> Branches; | |
1473 | Branches branch_info_; | |
7e57d19e | 1474 | Tocsave_loc tocsave_loc_; |
9e69ed50 AM |
1475 | |
1476 | bool plt_thread_safe_; | |
a3e60ddb AM |
1477 | |
1478 | bool relax_failed_; | |
1479 | int relax_fail_count_; | |
1480 | int32_t stub_group_size_; | |
d49044c7 AM |
1481 | |
1482 | Output_data_save_res<size, big_endian> *savres_section_; | |
42cacb20 DE |
1483 | }; |
1484 | ||
1485 | template<> | |
1486 | Target::Target_info Target_powerpc<32, true>::powerpc_info = | |
1487 | { | |
1488 | 32, // size | |
1489 | true, // is_big_endian | |
1490 | elfcpp::EM_PPC, // machine_code | |
1491 | false, // has_make_symbol | |
1492 | false, // has_resolve | |
1493 | false, // has_code_fill | |
1494 | true, // is_default_stack_executable | |
b3ce541e | 1495 | false, // can_icf_inline_merge_sections |
42cacb20 DE |
1496 | '\0', // wrap_char |
1497 | "/usr/lib/ld.so.1", // dynamic_linker | |
1498 | 0x10000000, // default_text_segment_address | |
1499 | 64 * 1024, // abi_pagesize (overridable by -z max-page-size) | |
8a5e3e08 | 1500 | 4 * 1024, // common_pagesize (overridable by -z common-page-size) |
c9269dff AM |
1501 | false, // isolate_execinstr |
1502 | 0, // rosegment_gap | |
8a5e3e08 ILT |
1503 | elfcpp::SHN_UNDEF, // small_common_shndx |
1504 | elfcpp::SHN_UNDEF, // large_common_shndx | |
1505 | 0, // small_common_section_flags | |
05a352e6 DK |
1506 | 0, // large_common_section_flags |
1507 | NULL, // attributes_section | |
a67858e0 | 1508 | NULL, // attributes_vendor |
8d9743bd MK |
1509 | "_start", // entry_symbol_name |
1510 | 32, // hash_entry_size | |
42cacb20 DE |
1511 | }; |
1512 | ||
1513 | template<> | |
1514 | Target::Target_info Target_powerpc<32, false>::powerpc_info = | |
1515 | { | |
1516 | 32, // size | |
1517 | false, // is_big_endian | |
1518 | elfcpp::EM_PPC, // machine_code | |
1519 | false, // has_make_symbol | |
1520 | false, // has_resolve | |
1521 | false, // has_code_fill | |
1522 | true, // is_default_stack_executable | |
b3ce541e | 1523 | false, // can_icf_inline_merge_sections |
42cacb20 DE |
1524 | '\0', // wrap_char |
1525 | "/usr/lib/ld.so.1", // dynamic_linker | |
1526 | 0x10000000, // default_text_segment_address | |
1527 | 64 * 1024, // abi_pagesize (overridable by -z max-page-size) | |
8a5e3e08 | 1528 | 4 * 1024, // common_pagesize (overridable by -z common-page-size) |
c9269dff AM |
1529 | false, // isolate_execinstr |
1530 | 0, // rosegment_gap | |
8a5e3e08 ILT |
1531 | elfcpp::SHN_UNDEF, // small_common_shndx |
1532 | elfcpp::SHN_UNDEF, // large_common_shndx | |
1533 | 0, // small_common_section_flags | |
05a352e6 DK |
1534 | 0, // large_common_section_flags |
1535 | NULL, // attributes_section | |
a67858e0 | 1536 | NULL, // attributes_vendor |
8d9743bd MK |
1537 | "_start", // entry_symbol_name |
1538 | 32, // hash_entry_size | |
42cacb20 DE |
1539 | }; |
1540 | ||
1541 | template<> | |
1542 | Target::Target_info Target_powerpc<64, true>::powerpc_info = | |
1543 | { | |
1544 | 64, // size | |
1545 | true, // is_big_endian | |
1546 | elfcpp::EM_PPC64, // machine_code | |
1547 | false, // has_make_symbol | |
1548 | false, // has_resolve | |
1549 | false, // has_code_fill | |
1550 | true, // is_default_stack_executable | |
b3ce541e | 1551 | false, // can_icf_inline_merge_sections |
42cacb20 DE |
1552 | '\0', // wrap_char |
1553 | "/usr/lib/ld.so.1", // dynamic_linker | |
1554 | 0x10000000, // default_text_segment_address | |
1555 | 64 * 1024, // abi_pagesize (overridable by -z max-page-size) | |
dd93cd0a | 1556 | 4 * 1024, // common_pagesize (overridable by -z common-page-size) |
c9269dff AM |
1557 | false, // isolate_execinstr |
1558 | 0, // rosegment_gap | |
8a5e3e08 ILT |
1559 | elfcpp::SHN_UNDEF, // small_common_shndx |
1560 | elfcpp::SHN_UNDEF, // large_common_shndx | |
1561 | 0, // small_common_section_flags | |
05a352e6 DK |
1562 | 0, // large_common_section_flags |
1563 | NULL, // attributes_section | |
a67858e0 | 1564 | NULL, // attributes_vendor |
8d9743bd MK |
1565 | "_start", // entry_symbol_name |
1566 | 32, // hash_entry_size | |
42cacb20 DE |
1567 | }; |
1568 | ||
1569 | template<> | |
1570 | Target::Target_info Target_powerpc<64, false>::powerpc_info = | |
1571 | { | |
1572 | 64, // size | |
1573 | false, // is_big_endian | |
1574 | elfcpp::EM_PPC64, // machine_code | |
1575 | false, // has_make_symbol | |
1576 | false, // has_resolve | |
1577 | false, // has_code_fill | |
1578 | true, // is_default_stack_executable | |
b3ce541e | 1579 | false, // can_icf_inline_merge_sections |
42cacb20 DE |
1580 | '\0', // wrap_char |
1581 | "/usr/lib/ld.so.1", // dynamic_linker | |
1582 | 0x10000000, // default_text_segment_address | |
1583 | 64 * 1024, // abi_pagesize (overridable by -z max-page-size) | |
dd93cd0a | 1584 | 4 * 1024, // common_pagesize (overridable by -z common-page-size) |
c9269dff AM |
1585 | false, // isolate_execinstr |
1586 | 0, // rosegment_gap | |
8a5e3e08 ILT |
1587 | elfcpp::SHN_UNDEF, // small_common_shndx |
1588 | elfcpp::SHN_UNDEF, // large_common_shndx | |
1589 | 0, // small_common_section_flags | |
05a352e6 DK |
1590 | 0, // large_common_section_flags |
1591 | NULL, // attributes_section | |
a67858e0 | 1592 | NULL, // attributes_vendor |
8d9743bd MK |
1593 | "_start", // entry_symbol_name |
1594 | 32, // hash_entry_size | |
42cacb20 DE |
1595 | }; |
1596 | ||
dd93cd0a AM |
1597 | inline bool |
1598 | is_branch_reloc(unsigned int r_type) | |
1599 | { | |
1600 | return (r_type == elfcpp::R_POWERPC_REL24 | |
1601 | || r_type == elfcpp::R_PPC_PLTREL24 | |
1602 | || r_type == elfcpp::R_PPC_LOCAL24PC | |
1603 | || r_type == elfcpp::R_POWERPC_REL14 | |
1604 | || r_type == elfcpp::R_POWERPC_REL14_BRTAKEN | |
1605 | || r_type == elfcpp::R_POWERPC_REL14_BRNTAKEN | |
1606 | || r_type == elfcpp::R_POWERPC_ADDR24 | |
1607 | || r_type == elfcpp::R_POWERPC_ADDR14 | |
1608 | || r_type == elfcpp::R_POWERPC_ADDR14_BRTAKEN | |
1609 | || r_type == elfcpp::R_POWERPC_ADDR14_BRNTAKEN); | |
1610 | } | |
1611 | ||
1612 | // If INSN is an opcode that may be used with an @tls operand, return | |
1613 | // the transformed insn for TLS optimisation, otherwise return 0. If | |
1614 | // REG is non-zero only match an insn with RB or RA equal to REG. | |
1615 | uint32_t | |
1616 | at_tls_transform(uint32_t insn, unsigned int reg) | |
1617 | { | |
1618 | if ((insn & (0x3f << 26)) != 31 << 26) | |
1619 | return 0; | |
1620 | ||
1621 | unsigned int rtra; | |
1622 | if (reg == 0 || ((insn >> 11) & 0x1f) == reg) | |
1623 | rtra = insn & ((1 << 26) - (1 << 16)); | |
1624 | else if (((insn >> 16) & 0x1f) == reg) | |
1625 | rtra = (insn & (0x1f << 21)) | ((insn & (0x1f << 11)) << 5); | |
1626 | else | |
1627 | return 0; | |
1628 | ||
1629 | if ((insn & (0x3ff << 1)) == 266 << 1) | |
1630 | // add -> addi | |
1631 | insn = 14 << 26; | |
1632 | else if ((insn & (0x1f << 1)) == 23 << 1 | |
1633 | && ((insn & (0x1f << 6)) < 14 << 6 | |
1634 | || ((insn & (0x1f << 6)) >= 16 << 6 | |
1635 | && (insn & (0x1f << 6)) < 24 << 6))) | |
1636 | // load and store indexed -> dform | |
1637 | insn = (32 | ((insn >> 6) & 0x1f)) << 26; | |
1638 | else if ((insn & (((0x1a << 5) | 0x1f) << 1)) == 21 << 1) | |
1639 | // ldx, ldux, stdx, stdux -> ld, ldu, std, stdu | |
1640 | insn = ((58 | ((insn >> 6) & 4)) << 26) | ((insn >> 6) & 1); | |
1641 | else if ((insn & (((0x1f << 5) | 0x1f) << 1)) == 341 << 1) | |
1642 | // lwax -> lwa | |
1643 | insn = (58 << 26) | 2; | |
1644 | else | |
1645 | return 0; | |
1646 | insn |= rtra; | |
1647 | return insn; | |
1648 | } | |
1649 | ||
dd93cd0a | 1650 | |
42cacb20 DE |
1651 | template<int size, bool big_endian> |
1652 | class Powerpc_relocate_functions | |
1653 | { | |
dd93cd0a | 1654 | public: |
f4baf0d4 | 1655 | enum Overflow_check |
dd93cd0a | 1656 | { |
f4baf0d4 AM |
1657 | CHECK_NONE, |
1658 | CHECK_SIGNED, | |
b80eed39 AM |
1659 | CHECK_UNSIGNED, |
1660 | CHECK_BITFIELD, | |
1661 | CHECK_LOW_INSN, | |
1662 | CHECK_HIGH_INSN | |
dd93cd0a AM |
1663 | }; |
1664 | ||
f4baf0d4 | 1665 | enum Status |
dd93cd0a | 1666 | { |
f4baf0d4 AM |
1667 | STATUS_OK, |
1668 | STATUS_OVERFLOW | |
1669 | }; | |
dd93cd0a | 1670 | |
42cacb20 | 1671 | private: |
c9269dff | 1672 | typedef Powerpc_relocate_functions<size, big_endian> This; |
c9269dff | 1673 | typedef typename elfcpp::Elf_types<size>::Elf_Addr Address; |
a680de9a | 1674 | typedef typename elfcpp::Elf_types<size>::Elf_Swxword SignedAddress; |
c9269dff | 1675 | |
dd93cd0a AM |
1676 | template<int valsize> |
1677 | static inline bool | |
1678 | has_overflow_signed(Address value) | |
1679 | { | |
1680 | // limit = 1 << (valsize - 1) without shift count exceeding size of type | |
1681 | Address limit = static_cast<Address>(1) << ((valsize - 1) >> 1); | |
1682 | limit <<= ((valsize - 1) >> 1); | |
1683 | limit <<= ((valsize - 1) - 2 * ((valsize - 1) >> 1)); | |
1684 | return value + limit > (limit << 1) - 1; | |
1685 | } | |
1686 | ||
1687 | template<int valsize> | |
1688 | static inline bool | |
b80eed39 | 1689 | has_overflow_unsigned(Address value) |
dd93cd0a AM |
1690 | { |
1691 | Address limit = static_cast<Address>(1) << ((valsize - 1) >> 1); | |
1692 | limit <<= ((valsize - 1) >> 1); | |
1693 | limit <<= ((valsize - 1) - 2 * ((valsize - 1) >> 1)); | |
b80eed39 AM |
1694 | return value > (limit << 1) - 1; |
1695 | } | |
1696 | ||
1697 | template<int valsize> | |
1698 | static inline bool | |
1699 | has_overflow_bitfield(Address value) | |
1700 | { | |
1701 | return (has_overflow_unsigned<valsize>(value) | |
1702 | && has_overflow_signed<valsize>(value)); | |
dd93cd0a AM |
1703 | } |
1704 | ||
1705 | template<int valsize> | |
f4baf0d4 AM |
1706 | static inline Status |
1707 | overflowed(Address value, Overflow_check overflow) | |
dd93cd0a | 1708 | { |
f4baf0d4 | 1709 | if (overflow == CHECK_SIGNED) |
dd93cd0a AM |
1710 | { |
1711 | if (has_overflow_signed<valsize>(value)) | |
f4baf0d4 | 1712 | return STATUS_OVERFLOW; |
dd93cd0a | 1713 | } |
b80eed39 AM |
1714 | else if (overflow == CHECK_UNSIGNED) |
1715 | { | |
1716 | if (has_overflow_unsigned<valsize>(value)) | |
1717 | return STATUS_OVERFLOW; | |
1718 | } | |
f4baf0d4 | 1719 | else if (overflow == CHECK_BITFIELD) |
dd93cd0a AM |
1720 | { |
1721 | if (has_overflow_bitfield<valsize>(value)) | |
f4baf0d4 | 1722 | return STATUS_OVERFLOW; |
dd93cd0a | 1723 | } |
f4baf0d4 | 1724 | return STATUS_OK; |
dd93cd0a AM |
1725 | } |
1726 | ||
cf43a2fe | 1727 | // Do a simple RELA relocation |
0cfb0717 | 1728 | template<int fieldsize, int valsize> |
f4baf0d4 AM |
1729 | static inline Status |
1730 | rela(unsigned char* view, Address value, Overflow_check overflow) | |
dd93cd0a | 1731 | { |
0cfb0717 | 1732 | typedef typename elfcpp::Swap<fieldsize, big_endian>::Valtype Valtype; |
dd93cd0a | 1733 | Valtype* wv = reinterpret_cast<Valtype*>(view); |
0cfb0717 | 1734 | elfcpp::Swap<fieldsize, big_endian>::writeval(wv, value); |
dd93cd0a AM |
1735 | return overflowed<valsize>(value, overflow); |
1736 | } | |
1737 | ||
0cfb0717 | 1738 | template<int fieldsize, int valsize> |
f4baf0d4 | 1739 | static inline Status |
42cacb20 DE |
1740 | rela(unsigned char* view, |
1741 | unsigned int right_shift, | |
0cfb0717 | 1742 | typename elfcpp::Valtype_base<fieldsize>::Valtype dst_mask, |
c9269dff | 1743 | Address value, |
f4baf0d4 | 1744 | Overflow_check overflow) |
42cacb20 | 1745 | { |
0cfb0717 | 1746 | typedef typename elfcpp::Swap<fieldsize, big_endian>::Valtype Valtype; |
42cacb20 | 1747 | Valtype* wv = reinterpret_cast<Valtype*>(view); |
0cfb0717 | 1748 | Valtype val = elfcpp::Swap<fieldsize, big_endian>::readval(wv); |
dd93cd0a | 1749 | Valtype reloc = value >> right_shift; |
42cacb20 DE |
1750 | val &= ~dst_mask; |
1751 | reloc &= dst_mask; | |
0cfb0717 | 1752 | elfcpp::Swap<fieldsize, big_endian>::writeval(wv, val | reloc); |
dd93cd0a | 1753 | return overflowed<valsize>(value >> right_shift, overflow); |
42cacb20 DE |
1754 | } |
1755 | ||
cf43a2fe | 1756 | // Do a simple RELA relocation, unaligned. |
0cfb0717 | 1757 | template<int fieldsize, int valsize> |
f4baf0d4 AM |
1758 | static inline Status |
1759 | rela_ua(unsigned char* view, Address value, Overflow_check overflow) | |
dd93cd0a | 1760 | { |
0cfb0717 | 1761 | elfcpp::Swap_unaligned<fieldsize, big_endian>::writeval(view, value); |
dd93cd0a AM |
1762 | return overflowed<valsize>(value, overflow); |
1763 | } | |
1764 | ||
0cfb0717 | 1765 | template<int fieldsize, int valsize> |
f4baf0d4 | 1766 | static inline Status |
cf43a2fe AM |
1767 | rela_ua(unsigned char* view, |
1768 | unsigned int right_shift, | |
0cfb0717 | 1769 | typename elfcpp::Valtype_base<fieldsize>::Valtype dst_mask, |
c9269dff | 1770 | Address value, |
f4baf0d4 | 1771 | Overflow_check overflow) |
42cacb20 | 1772 | { |
0cfb0717 | 1773 | typedef typename elfcpp::Swap_unaligned<fieldsize, big_endian>::Valtype |
c9269dff | 1774 | Valtype; |
0cfb0717 | 1775 | Valtype val = elfcpp::Swap<fieldsize, big_endian>::readval(view); |
dd93cd0a | 1776 | Valtype reloc = value >> right_shift; |
42cacb20 DE |
1777 | val &= ~dst_mask; |
1778 | reloc &= dst_mask; | |
0cfb0717 | 1779 | elfcpp::Swap_unaligned<fieldsize, big_endian>::writeval(view, val | reloc); |
dd93cd0a | 1780 | return overflowed<valsize>(value >> right_shift, overflow); |
42cacb20 DE |
1781 | } |
1782 | ||
42cacb20 | 1783 | public: |
dd93cd0a | 1784 | // R_PPC64_ADDR64: (Symbol + Addend) |
42cacb20 | 1785 | static inline void |
dd93cd0a | 1786 | addr64(unsigned char* view, Address value) |
0cfb0717 | 1787 | { This::template rela<64,64>(view, value, CHECK_NONE); } |
42cacb20 | 1788 | |
dd93cd0a | 1789 | // R_PPC64_UADDR64: (Symbol + Addend) unaligned |
42cacb20 | 1790 | static inline void |
dd93cd0a | 1791 | addr64_u(unsigned char* view, Address value) |
0cfb0717 | 1792 | { This::template rela_ua<64,64>(view, value, CHECK_NONE); } |
dd93cd0a AM |
1793 | |
1794 | // R_POWERPC_ADDR32: (Symbol + Addend) | |
f4baf0d4 AM |
1795 | static inline Status |
1796 | addr32(unsigned char* view, Address value, Overflow_check overflow) | |
0cfb0717 | 1797 | { return This::template rela<32,32>(view, value, overflow); } |
dd93cd0a AM |
1798 | |
1799 | // R_POWERPC_UADDR32: (Symbol + Addend) unaligned | |
f4baf0d4 AM |
1800 | static inline Status |
1801 | addr32_u(unsigned char* view, Address value, Overflow_check overflow) | |
0cfb0717 | 1802 | { return This::template rela_ua<32,32>(view, value, overflow); } |
dd93cd0a AM |
1803 | |
1804 | // R_POWERPC_ADDR24: (Symbol + Addend) & 0x3fffffc | |
f4baf0d4 AM |
1805 | static inline Status |
1806 | addr24(unsigned char* view, Address value, Overflow_check overflow) | |
dd93cd0a | 1807 | { |
0cfb0717 AM |
1808 | Status stat = This::template rela<32,26>(view, 0, 0x03fffffc, |
1809 | value, overflow); | |
f4baf0d4 AM |
1810 | if (overflow != CHECK_NONE && (value & 3) != 0) |
1811 | stat = STATUS_OVERFLOW; | |
dd93cd0a AM |
1812 | return stat; |
1813 | } | |
42cacb20 DE |
1814 | |
1815 | // R_POWERPC_ADDR16: (Symbol + Addend) & 0xffff | |
f4baf0d4 AM |
1816 | static inline Status |
1817 | addr16(unsigned char* view, Address value, Overflow_check overflow) | |
0cfb0717 | 1818 | { return This::template rela<16,16>(view, value, overflow); } |
42cacb20 | 1819 | |
dd93cd0a | 1820 | // R_POWERPC_ADDR16: (Symbol + Addend) & 0xffff, unaligned |
f4baf0d4 AM |
1821 | static inline Status |
1822 | addr16_u(unsigned char* view, Address value, Overflow_check overflow) | |
0cfb0717 | 1823 | { return This::template rela_ua<16,16>(view, value, overflow); } |
42cacb20 | 1824 | |
dd93cd0a | 1825 | // R_POWERPC_ADDR16_DS: (Symbol + Addend) & 0xfffc |
f4baf0d4 AM |
1826 | static inline Status |
1827 | addr16_ds(unsigned char* view, Address value, Overflow_check overflow) | |
dd93cd0a | 1828 | { |
0cfb0717 | 1829 | Status stat = This::template rela<16,16>(view, 0, 0xfffc, value, overflow); |
ec86f434 | 1830 | if ((value & 3) != 0) |
f4baf0d4 | 1831 | stat = STATUS_OVERFLOW; |
dd93cd0a AM |
1832 | return stat; |
1833 | } | |
42cacb20 | 1834 | |
a680de9a PB |
1835 | // R_POWERPC_ADDR16_DQ: (Symbol + Addend) & 0xfff0 |
1836 | static inline Status | |
1837 | addr16_dq(unsigned char* view, Address value, Overflow_check overflow) | |
1838 | { | |
1839 | Status stat = This::template rela<16,16>(view, 0, 0xfff0, value, overflow); | |
1840 | if ((value & 15) != 0) | |
1841 | stat = STATUS_OVERFLOW; | |
1842 | return stat; | |
1843 | } | |
1844 | ||
42cacb20 DE |
1845 | // R_POWERPC_ADDR16_HI: ((Symbol + Addend) >> 16) & 0xffff |
1846 | static inline void | |
dd93cd0a | 1847 | addr16_hi(unsigned char* view, Address value) |
0cfb0717 | 1848 | { This::template rela<16,16>(view, 16, 0xffff, value, CHECK_NONE); } |
42cacb20 | 1849 | |
c9269dff | 1850 | // R_POWERPC_ADDR16_HA: ((Symbol + Addend + 0x8000) >> 16) & 0xffff |
42cacb20 | 1851 | static inline void |
dd93cd0a AM |
1852 | addr16_ha(unsigned char* view, Address value) |
1853 | { This::addr16_hi(view, value + 0x8000); } | |
42cacb20 | 1854 | |
dd93cd0a | 1855 | // R_POWERPC_ADDR16_HIGHER: ((Symbol + Addend) >> 32) & 0xffff |
42cacb20 | 1856 | static inline void |
dd93cd0a | 1857 | addr16_hi2(unsigned char* view, Address value) |
0cfb0717 | 1858 | { This::template rela<16,16>(view, 32, 0xffff, value, CHECK_NONE); } |
42cacb20 | 1859 | |
dd93cd0a | 1860 | // R_POWERPC_ADDR16_HIGHERA: ((Symbol + Addend + 0x8000) >> 32) & 0xffff |
42cacb20 | 1861 | static inline void |
dd93cd0a AM |
1862 | addr16_ha2(unsigned char* view, Address value) |
1863 | { This::addr16_hi2(view, value + 0x8000); } | |
42cacb20 | 1864 | |
dd93cd0a | 1865 | // R_POWERPC_ADDR16_HIGHEST: ((Symbol + Addend) >> 48) & 0xffff |
42cacb20 | 1866 | static inline void |
dd93cd0a | 1867 | addr16_hi3(unsigned char* view, Address value) |
0cfb0717 | 1868 | { This::template rela<16,16>(view, 48, 0xffff, value, CHECK_NONE); } |
42cacb20 | 1869 | |
dd93cd0a | 1870 | // R_POWERPC_ADDR16_HIGHESTA: ((Symbol + Addend + 0x8000) >> 48) & 0xffff |
42cacb20 | 1871 | static inline void |
dd93cd0a AM |
1872 | addr16_ha3(unsigned char* view, Address value) |
1873 | { This::addr16_hi3(view, value + 0x8000); } | |
1874 | ||
1875 | // R_POWERPC_ADDR14: (Symbol + Addend) & 0xfffc | |
f4baf0d4 AM |
1876 | static inline Status |
1877 | addr14(unsigned char* view, Address value, Overflow_check overflow) | |
dd93cd0a | 1878 | { |
0cfb0717 | 1879 | Status stat = This::template rela<32,16>(view, 0, 0xfffc, value, overflow); |
f4baf0d4 AM |
1880 | if (overflow != CHECK_NONE && (value & 3) != 0) |
1881 | stat = STATUS_OVERFLOW; | |
dd93cd0a AM |
1882 | return stat; |
1883 | } | |
a680de9a PB |
1884 | |
1885 | // R_POWERPC_REL16DX_HA | |
1886 | static inline Status | |
1887 | addr16dx_ha(unsigned char *view, Address value, Overflow_check overflow) | |
1888 | { | |
1889 | typedef typename elfcpp::Swap<32, big_endian>::Valtype Valtype; | |
1890 | Valtype* wv = reinterpret_cast<Valtype*>(view); | |
1891 | Valtype val = elfcpp::Swap<32, big_endian>::readval(wv); | |
1892 | value += 0x8000; | |
1893 | value = static_cast<SignedAddress>(value) >> 16; | |
1894 | val |= (value & 0xffc1) | ((value & 0x3e) << 15); | |
1895 | elfcpp::Swap<32, big_endian>::writeval(wv, val); | |
1896 | return overflowed<16>(value, overflow); | |
1897 | } | |
cf43a2fe AM |
1898 | }; |
1899 | ||
b4f7960d AM |
1900 | // Set ABI version for input and output. |
1901 | ||
1902 | template<int size, bool big_endian> | |
1903 | void | |
1904 | Powerpc_relobj<size, big_endian>::set_abiversion(int ver) | |
1905 | { | |
1906 | this->e_flags_ |= ver; | |
1907 | if (this->abiversion() != 0) | |
1908 | { | |
1909 | Target_powerpc<size, big_endian>* target = | |
1910 | static_cast<Target_powerpc<size, big_endian>*>( | |
1911 | parameters->sized_target<size, big_endian>()); | |
1912 | if (target->abiversion() == 0) | |
1913 | target->set_abiversion(this->abiversion()); | |
1914 | else if (target->abiversion() != this->abiversion()) | |
1915 | gold_error(_("%s: ABI version %d is not compatible " | |
1916 | "with ABI version %d output"), | |
1917 | this->name().c_str(), | |
1918 | this->abiversion(), target->abiversion()); | |
1919 | ||
1920 | } | |
1921 | } | |
1922 | ||
5edad15d AM |
1923 | // Stash away the index of .got2, .opd, .rela.toc, and .toc in a |
1924 | // relocatable object, if such sections exists. | |
cf43a2fe AM |
1925 | |
1926 | template<int size, bool big_endian> | |
1927 | bool | |
1928 | Powerpc_relobj<size, big_endian>::do_find_special_sections( | |
1929 | Read_symbols_data* sd) | |
1930 | { | |
c9269dff AM |
1931 | const unsigned char* const pshdrs = sd->section_headers->data(); |
1932 | const unsigned char* namesu = sd->section_names->data(); | |
1933 | const char* names = reinterpret_cast<const char*>(namesu); | |
1934 | section_size_type names_size = sd->section_names_size; | |
1935 | const unsigned char* s; | |
1936 | ||
dc3714f3 AM |
1937 | s = this->template find_shdr<size, big_endian>(pshdrs, |
1938 | size == 32 ? ".got2" : ".opd", | |
1939 | names, names_size, NULL); | |
c9269dff AM |
1940 | if (s != NULL) |
1941 | { | |
1942 | unsigned int ndx = (s - pshdrs) / elfcpp::Elf_sizes<size>::shdr_size; | |
1943 | this->special_ = ndx; | |
b4f7960d AM |
1944 | if (size == 64) |
1945 | { | |
1946 | if (this->abiversion() == 0) | |
1947 | this->set_abiversion(1); | |
1948 | else if (this->abiversion() > 1) | |
1949 | gold_error(_("%s: .opd invalid in abiv%d"), | |
1950 | this->name().c_str(), this->abiversion()); | |
1951 | } | |
c9269dff | 1952 | } |
5edad15d AM |
1953 | if (size == 64) |
1954 | { | |
1955 | s = this->template find_shdr<size, big_endian>(pshdrs, ".rela.toc", | |
1956 | names, names_size, NULL); | |
1957 | if (s != NULL) | |
1958 | { | |
1959 | unsigned int ndx = (s - pshdrs) / elfcpp::Elf_sizes<size>::shdr_size; | |
1960 | this->relatoc_ = ndx; | |
1961 | typename elfcpp::Shdr<size, big_endian> shdr(s); | |
1962 | this->toc_ = this->adjust_shndx(shdr.get_sh_info()); | |
1963 | } | |
1964 | } | |
c9269dff AM |
1965 | return Sized_relobj_file<size, big_endian>::do_find_special_sections(sd); |
1966 | } | |
1967 | ||
1968 | // Examine .rela.opd to build info about function entry points. | |
1969 | ||
1970 | template<int size, bool big_endian> | |
1971 | void | |
1972 | Powerpc_relobj<size, big_endian>::scan_opd_relocs( | |
1973 | size_t reloc_count, | |
1974 | const unsigned char* prelocs, | |
1975 | const unsigned char* plocal_syms) | |
1976 | { | |
1977 | if (size == 64) | |
cf43a2fe | 1978 | { |
0e123f69 AM |
1979 | typedef typename elfcpp::Rela<size, big_endian> Reltype; |
1980 | const int reloc_size = elfcpp::Elf_sizes<size>::rela_size; | |
c9269dff | 1981 | const int sym_size = elfcpp::Elf_sizes<size>::sym_size; |
ec4dbad3 AM |
1982 | Address expected_off = 0; |
1983 | bool regular = true; | |
1984 | unsigned int opd_ent_size = 0; | |
c9269dff AM |
1985 | |
1986 | for (size_t i = 0; i < reloc_count; ++i, prelocs += reloc_size) | |
cf43a2fe | 1987 | { |
c9269dff AM |
1988 | Reltype reloc(prelocs); |
1989 | typename elfcpp::Elf_types<size>::Elf_WXword r_info | |
1990 | = reloc.get_r_info(); | |
1991 | unsigned int r_type = elfcpp::elf_r_type<size>(r_info); | |
1992 | if (r_type == elfcpp::R_PPC64_ADDR64) | |
1993 | { | |
1994 | unsigned int r_sym = elfcpp::elf_r_sym<size>(r_info); | |
1995 | typename elfcpp::Elf_types<size>::Elf_Addr value; | |
1996 | bool is_ordinary; | |
1997 | unsigned int shndx; | |
1998 | if (r_sym < this->local_symbol_count()) | |
1999 | { | |
2000 | typename elfcpp::Sym<size, big_endian> | |
2001 | lsym(plocal_syms + r_sym * sym_size); | |
2002 | shndx = lsym.get_st_shndx(); | |
2003 | shndx = this->adjust_sym_shndx(r_sym, shndx, &is_ordinary); | |
2004 | value = lsym.get_st_value(); | |
2005 | } | |
2006 | else | |
2007 | shndx = this->symbol_section_and_value(r_sym, &value, | |
2008 | &is_ordinary); | |
2009 | this->set_opd_ent(reloc.get_r_offset(), shndx, | |
2010 | value + reloc.get_r_addend()); | |
ec4dbad3 AM |
2011 | if (i == 2) |
2012 | { | |
2013 | expected_off = reloc.get_r_offset(); | |
2014 | opd_ent_size = expected_off; | |
2015 | } | |
2016 | else if (expected_off != reloc.get_r_offset()) | |
2017 | regular = false; | |
2018 | expected_off += opd_ent_size; | |
2019 | } | |
2020 | else if (r_type == elfcpp::R_PPC64_TOC) | |
2021 | { | |
2022 | if (expected_off - opd_ent_size + 8 != reloc.get_r_offset()) | |
2023 | regular = false; | |
2024 | } | |
2025 | else | |
2026 | { | |
2027 | gold_warning(_("%s: unexpected reloc type %u in .opd section"), | |
2028 | this->name().c_str(), r_type); | |
2029 | regular = false; | |
c9269dff AM |
2030 | } |
2031 | } | |
ec4dbad3 AM |
2032 | if (reloc_count <= 2) |
2033 | opd_ent_size = this->section_size(this->opd_shndx()); | |
2034 | if (opd_ent_size != 24 && opd_ent_size != 16) | |
2035 | regular = false; | |
2036 | if (!regular) | |
2037 | { | |
2038 | gold_warning(_("%s: .opd is not a regular array of opd entries"), | |
2039 | this->name().c_str()); | |
2040 | opd_ent_size = 0; | |
2041 | } | |
c9269dff AM |
2042 | } |
2043 | } | |
2044 | ||
5edad15d AM |
2045 | // Returns true if a code sequence loading the TOC entry at VALUE |
2046 | // relative to the TOC pointer can be converted into code calculating | |
2047 | // a TOC pointer relative offset. | |
2048 | // If so, the TOC pointer relative offset is stored to VALUE. | |
2049 | ||
2050 | template<int size, bool big_endian> | |
2051 | bool | |
2052 | Powerpc_relobj<size, big_endian>::make_toc_relative( | |
2053 | Target_powerpc<size, big_endian>* target, | |
2054 | Address* value) | |
2055 | { | |
2056 | if (size != 64) | |
2057 | return false; | |
2058 | ||
e666304e AM |
2059 | // With -mcmodel=medium code it is quite possible to have |
2060 | // toc-relative relocs referring to objects outside the TOC. | |
2061 | // Don't try to look at a non-existent TOC. | |
2062 | if (this->toc_shndx() == 0) | |
2063 | return false; | |
2064 | ||
5edad15d AM |
2065 | // Convert VALUE back to an address by adding got_base (see below), |
2066 | // then to an offset in the TOC by subtracting the TOC output | |
2067 | // section address and the TOC output offset. Since this TOC output | |
2068 | // section and the got output section are one and the same, we can | |
2069 | // omit adding and subtracting the output section address. | |
2070 | Address off = (*value + this->toc_base_offset() | |
2071 | - this->output_section_offset(this->toc_shndx())); | |
2072 | // Is this offset in the TOC? -mcmodel=medium code may be using | |
2073 | // TOC relative access to variables outside the TOC. Those of | |
2074 | // course can't be optimized. We also don't try to optimize code | |
2075 | // that is using a different object's TOC. | |
2076 | if (off >= this->section_size(this->toc_shndx())) | |
2077 | return false; | |
2078 | ||
2079 | if (this->no_toc_opt(off)) | |
2080 | return false; | |
2081 | ||
2082 | section_size_type vlen; | |
2083 | unsigned char* view = this->get_output_view(this->toc_shndx(), &vlen); | |
2084 | Address addr = elfcpp::Swap<size, big_endian>::readval(view + off); | |
2085 | // The TOC pointer | |
2086 | Address got_base = (target->got_section()->output_section()->address() | |
2087 | + this->toc_base_offset()); | |
2088 | addr -= got_base; | |
857e829e | 2089 | if (addr + (uint64_t) 0x80008000 >= (uint64_t) 1 << 32) |
5edad15d AM |
2090 | return false; |
2091 | ||
2092 | *value = addr; | |
2093 | return true; | |
2094 | } | |
2095 | ||
2096 | // Perform the Sized_relobj_file method, then set up opd info from | |
2097 | // .opd relocs. | |
2098 | ||
c9269dff AM |
2099 | template<int size, bool big_endian> |
2100 | void | |
2101 | Powerpc_relobj<size, big_endian>::do_read_relocs(Read_relocs_data* rd) | |
2102 | { | |
2103 | Sized_relobj_file<size, big_endian>::do_read_relocs(rd); | |
2104 | if (size == 64) | |
2105 | { | |
2106 | for (Read_relocs_data::Relocs_list::iterator p = rd->relocs.begin(); | |
2107 | p != rd->relocs.end(); | |
2108 | ++p) | |
2109 | { | |
2110 | if (p->data_shndx == this->opd_shndx()) | |
2111 | { | |
ec4dbad3 AM |
2112 | uint64_t opd_size = this->section_size(this->opd_shndx()); |
2113 | gold_assert(opd_size == static_cast<size_t>(opd_size)); | |
2114 | if (opd_size != 0) | |
2115 | { | |
2116 | this->init_opd(opd_size); | |
2117 | this->scan_opd_relocs(p->reloc_count, p->contents->data(), | |
2118 | rd->local_symbols->data()); | |
2119 | } | |
c9269dff AM |
2120 | break; |
2121 | } | |
cf43a2fe AM |
2122 | } |
2123 | } | |
cf43a2fe AM |
2124 | } |
2125 | ||
b4f7960d AM |
2126 | // Read the symbols then set up st_other vector. |
2127 | ||
2128 | template<int size, bool big_endian> | |
2129 | void | |
2130 | Powerpc_relobj<size, big_endian>::do_read_symbols(Read_symbols_data* sd) | |
2131 | { | |
f35c4853 | 2132 | this->base_read_symbols(sd); |
b4f7960d AM |
2133 | if (size == 64) |
2134 | { | |
2135 | const int shdr_size = elfcpp::Elf_sizes<size>::shdr_size; | |
2136 | const unsigned char* const pshdrs = sd->section_headers->data(); | |
2137 | const unsigned int loccount = this->do_local_symbol_count(); | |
2138 | if (loccount != 0) | |
2139 | { | |
2140 | this->st_other_.resize(loccount); | |
2141 | const int sym_size = elfcpp::Elf_sizes<size>::sym_size; | |
2142 | off_t locsize = loccount * sym_size; | |
2143 | const unsigned int symtab_shndx = this->symtab_shndx(); | |
2144 | const unsigned char *psymtab = pshdrs + symtab_shndx * shdr_size; | |
2145 | typename elfcpp::Shdr<size, big_endian> shdr(psymtab); | |
2146 | const unsigned char* psyms = this->get_view(shdr.get_sh_offset(), | |
2147 | locsize, true, false); | |
2148 | psyms += sym_size; | |
2149 | for (unsigned int i = 1; i < loccount; ++i, psyms += sym_size) | |
2150 | { | |
2151 | elfcpp::Sym<size, big_endian> sym(psyms); | |
2152 | unsigned char st_other = sym.get_st_other(); | |
2153 | this->st_other_[i] = st_other; | |
2154 | if ((st_other & elfcpp::STO_PPC64_LOCAL_MASK) != 0) | |
2155 | { | |
2156 | if (this->abiversion() == 0) | |
2157 | this->set_abiversion(2); | |
2158 | else if (this->abiversion() < 2) | |
2159 | gold_error(_("%s: local symbol %d has invalid st_other" | |
2160 | " for ABI version 1"), | |
2161 | this->name().c_str(), i); | |
2162 | } | |
2163 | } | |
2164 | } | |
2165 | } | |
2166 | } | |
2167 | ||
2168 | template<int size, bool big_endian> | |
2169 | void | |
2170 | Powerpc_dynobj<size, big_endian>::set_abiversion(int ver) | |
2171 | { | |
2172 | this->e_flags_ |= ver; | |
2173 | if (this->abiversion() != 0) | |
2174 | { | |
2175 | Target_powerpc<size, big_endian>* target = | |
2176 | static_cast<Target_powerpc<size, big_endian>*>( | |
2177 | parameters->sized_target<size, big_endian>()); | |
2178 | if (target->abiversion() == 0) | |
2179 | target->set_abiversion(this->abiversion()); | |
2180 | else if (target->abiversion() != this->abiversion()) | |
2181 | gold_error(_("%s: ABI version %d is not compatible " | |
2182 | "with ABI version %d output"), | |
2183 | this->name().c_str(), | |
2184 | this->abiversion(), target->abiversion()); | |
2185 | ||
2186 | } | |
2187 | } | |
2188 | ||
f35c4853 | 2189 | // Call Sized_dynobj::base_read_symbols to read the symbols then |
dc3714f3 AM |
2190 | // read .opd from a dynamic object, filling in opd_ent_ vector, |
2191 | ||
2192 | template<int size, bool big_endian> | |
2193 | void | |
2194 | Powerpc_dynobj<size, big_endian>::do_read_symbols(Read_symbols_data* sd) | |
2195 | { | |
f35c4853 | 2196 | this->base_read_symbols(sd); |
dc3714f3 AM |
2197 | if (size == 64) |
2198 | { | |
2199 | const int shdr_size = elfcpp::Elf_sizes<size>::shdr_size; | |
2200 | const unsigned char* const pshdrs = sd->section_headers->data(); | |
2201 | const unsigned char* namesu = sd->section_names->data(); | |
2202 | const char* names = reinterpret_cast<const char*>(namesu); | |
2203 | const unsigned char* s = NULL; | |
2204 | const unsigned char* opd; | |
2205 | section_size_type opd_size; | |
2206 | ||
2207 | // Find and read .opd section. | |
2208 | while (1) | |
2209 | { | |
2210 | s = this->template find_shdr<size, big_endian>(pshdrs, ".opd", names, | |
2211 | sd->section_names_size, | |
2212 | s); | |
2213 | if (s == NULL) | |
2214 | return; | |
2215 | ||
2216 | typename elfcpp::Shdr<size, big_endian> shdr(s); | |
2217 | if (shdr.get_sh_type() == elfcpp::SHT_PROGBITS | |
2218 | && (shdr.get_sh_flags() & elfcpp::SHF_ALLOC) != 0) | |
2219 | { | |
b4f7960d AM |
2220 | if (this->abiversion() == 0) |
2221 | this->set_abiversion(1); | |
2222 | else if (this->abiversion() > 1) | |
2223 | gold_error(_("%s: .opd invalid in abiv%d"), | |
2224 | this->name().c_str(), this->abiversion()); | |
2225 | ||
dc3714f3 AM |
2226 | this->opd_shndx_ = (s - pshdrs) / shdr_size; |
2227 | this->opd_address_ = shdr.get_sh_addr(); | |
2228 | opd_size = convert_to_section_size_type(shdr.get_sh_size()); | |
2229 | opd = this->get_view(shdr.get_sh_offset(), opd_size, | |
2230 | true, false); | |
2231 | break; | |
2232 | } | |
2233 | } | |
2234 | ||
2235 | // Build set of executable sections. | |
2236 | // Using a set is probably overkill. There is likely to be only | |
2237 | // a few executable sections, typically .init, .text and .fini, | |
2238 | // and they are generally grouped together. | |
2239 | typedef std::set<Sec_info> Exec_sections; | |
2240 | Exec_sections exec_sections; | |
2241 | s = pshdrs; | |
2242 | for (unsigned int i = 1; i < this->shnum(); ++i, s += shdr_size) | |
2243 | { | |
2244 | typename elfcpp::Shdr<size, big_endian> shdr(s); | |
2245 | if (shdr.get_sh_type() == elfcpp::SHT_PROGBITS | |
2246 | && ((shdr.get_sh_flags() | |
2247 | & (elfcpp::SHF_ALLOC | elfcpp::SHF_EXECINSTR)) | |
2248 | == (elfcpp::SHF_ALLOC | elfcpp::SHF_EXECINSTR)) | |
2249 | && shdr.get_sh_size() != 0) | |
2250 | { | |
2251 | exec_sections.insert(Sec_info(shdr.get_sh_addr(), | |
2252 | shdr.get_sh_size(), i)); | |
2253 | } | |
2254 | } | |
2255 | if (exec_sections.empty()) | |
2256 | return; | |
2257 | ||
2258 | // Look over the OPD entries. This is complicated by the fact | |
2259 | // that some binaries will use two-word entries while others | |
2260 | // will use the standard three-word entries. In most cases | |
2261 | // the third word (the environment pointer for languages like | |
2262 | // Pascal) is unused and will be zero. If the third word is | |
2263 | // used it should not be pointing into executable sections, | |
2264 | // I think. | |
2265 | this->init_opd(opd_size); | |
2266 | for (const unsigned char* p = opd; p < opd + opd_size; p += 8) | |
2267 | { | |
2268 | typedef typename elfcpp::Swap<64, big_endian>::Valtype Valtype; | |
2269 | const Valtype* valp = reinterpret_cast<const Valtype*>(p); | |
2270 | Valtype val = elfcpp::Swap<64, big_endian>::readval(valp); | |
2271 | if (val == 0) | |
2272 | // Chances are that this is the third word of an OPD entry. | |
2273 | continue; | |
2274 | typename Exec_sections::const_iterator e | |
2275 | = exec_sections.upper_bound(Sec_info(val, 0, 0)); | |
2276 | if (e != exec_sections.begin()) | |
2277 | { | |
2278 | --e; | |
2279 | if (e->start <= val && val < e->start + e->len) | |
2280 | { | |
2281 | // We have an address in an executable section. | |
2282 | // VAL ought to be the function entry, set it up. | |
2283 | this->set_opd_ent(p - opd, e->shndx, val); | |
2284 | // Skip second word of OPD entry, the TOC pointer. | |
2285 | p += 8; | |
2286 | } | |
2287 | } | |
2288 | // If we didn't match any executable sections, we likely | |
2289 | // have a non-zero third word in the OPD entry. | |
2290 | } | |
2291 | } | |
2292 | } | |
2293 | ||
5edad15d AM |
2294 | // Relocate sections. |
2295 | ||
2296 | template<int size, bool big_endian> | |
2297 | void | |
2298 | Powerpc_relobj<size, big_endian>::do_relocate_sections( | |
2299 | const Symbol_table* symtab, const Layout* layout, | |
2300 | const unsigned char* pshdrs, Output_file* of, | |
2301 | typename Sized_relobj_file<size, big_endian>::Views* pviews) | |
2302 | { | |
2303 | unsigned int start = 1; | |
2304 | if (size == 64 | |
2305 | && this->relatoc_ != 0 | |
2306 | && !parameters->options().relocatable()) | |
2307 | { | |
2308 | // Relocate .toc first. | |
2309 | this->relocate_section_range(symtab, layout, pshdrs, of, pviews, | |
2310 | this->relatoc_, this->relatoc_); | |
2311 | this->relocate_section_range(symtab, layout, pshdrs, of, pviews, | |
2312 | 1, this->relatoc_ - 1); | |
2313 | start = this->relatoc_ + 1; | |
2314 | } | |
2315 | this->relocate_section_range(symtab, layout, pshdrs, of, pviews, | |
2316 | start, this->shnum() - 1); | |
2317 | } | |
2318 | ||
f43ba157 | 2319 | // Set up some symbols. |
26a4e9cb AM |
2320 | |
2321 | template<int size, bool big_endian> | |
2322 | void | |
f43ba157 AM |
2323 | Target_powerpc<size, big_endian>::do_define_standard_symbols( |
2324 | Symbol_table* symtab, | |
2325 | Layout* layout) | |
26a4e9cb AM |
2326 | { |
2327 | if (size == 32) | |
2328 | { | |
bb66a627 AM |
2329 | // Define _GLOBAL_OFFSET_TABLE_ to ensure it isn't seen as |
2330 | // undefined when scanning relocs (and thus requires | |
26a4e9cb AM |
2331 | // non-relative dynamic relocs). The proper value will be |
2332 | // updated later. | |
2333 | Symbol *gotsym = symtab->lookup("_GLOBAL_OFFSET_TABLE_", NULL); | |
2334 | if (gotsym != NULL && gotsym->is_undefined()) | |
2335 | { | |
2336 | Target_powerpc<size, big_endian>* target = | |
2337 | static_cast<Target_powerpc<size, big_endian>*>( | |
2338 | parameters->sized_target<size, big_endian>()); | |
2339 | Output_data_got_powerpc<size, big_endian>* got | |
2340 | = target->got_section(symtab, layout); | |
2341 | symtab->define_in_output_data("_GLOBAL_OFFSET_TABLE_", NULL, | |
2342 | Symbol_table::PREDEFINED, | |
2343 | got, 0, 0, | |
2344 | elfcpp::STT_OBJECT, | |
bb66a627 | 2345 | elfcpp::STB_LOCAL, |
26a4e9cb AM |
2346 | elfcpp::STV_HIDDEN, 0, |
2347 | false, false); | |
2348 | } | |
2349 | ||
2350 | // Define _SDA_BASE_ at the start of the .sdata section + 32768. | |
2351 | Symbol *sdasym = symtab->lookup("_SDA_BASE_", NULL); | |
2352 | if (sdasym != NULL && sdasym->is_undefined()) | |
2353 | { | |
2354 | Output_data_space* sdata = new Output_data_space(4, "** sdata"); | |
2355 | Output_section* os | |
2356 | = layout->add_output_section_data(".sdata", 0, | |
2357 | elfcpp::SHF_ALLOC | |
2358 | | elfcpp::SHF_WRITE, | |
2359 | sdata, ORDER_SMALL_DATA, false); | |
2360 | symtab->define_in_output_data("_SDA_BASE_", NULL, | |
2361 | Symbol_table::PREDEFINED, | |
2362 | os, 32768, 0, elfcpp::STT_OBJECT, | |
2363 | elfcpp::STB_LOCAL, elfcpp::STV_HIDDEN, | |
2364 | 0, false, false); | |
2365 | } | |
2366 | } | |
b4f7960d AM |
2367 | else |
2368 | { | |
2369 | // Define .TOC. as for 32-bit _GLOBAL_OFFSET_TABLE_ | |
2370 | Symbol *gotsym = symtab->lookup(".TOC.", NULL); | |
2371 | if (gotsym != NULL && gotsym->is_undefined()) | |
2372 | { | |
2373 | Target_powerpc<size, big_endian>* target = | |
2374 | static_cast<Target_powerpc<size, big_endian>*>( | |
2375 | parameters->sized_target<size, big_endian>()); | |
2376 | Output_data_got_powerpc<size, big_endian>* got | |
2377 | = target->got_section(symtab, layout); | |
2378 | symtab->define_in_output_data(".TOC.", NULL, | |
2379 | Symbol_table::PREDEFINED, | |
2380 | got, 0x8000, 0, | |
2381 | elfcpp::STT_OBJECT, | |
2382 | elfcpp::STB_LOCAL, | |
2383 | elfcpp::STV_HIDDEN, 0, | |
2384 | false, false); | |
2385 | } | |
2386 | } | |
26a4e9cb AM |
2387 | } |
2388 | ||
cf43a2fe AM |
2389 | // Set up PowerPC target specific relobj. |
2390 | ||
2391 | template<int size, bool big_endian> | |
2392 | Object* | |
2393 | Target_powerpc<size, big_endian>::do_make_elf_object( | |
2394 | const std::string& name, | |
2395 | Input_file* input_file, | |
2396 | off_t offset, const elfcpp::Ehdr<size, big_endian>& ehdr) | |
2397 | { | |
2398 | int et = ehdr.get_e_type(); | |
957564c9 AS |
2399 | // ET_EXEC files are valid input for --just-symbols/-R, |
2400 | // and we treat them as relocatable objects. | |
2401 | if (et == elfcpp::ET_REL | |
2402 | || (et == elfcpp::ET_EXEC && input_file->just_symbols())) | |
cf43a2fe AM |
2403 | { |
2404 | Powerpc_relobj<size, big_endian>* obj = | |
c9269dff | 2405 | new Powerpc_relobj<size, big_endian>(name, input_file, offset, ehdr); |
cf43a2fe AM |
2406 | obj->setup(); |
2407 | return obj; | |
2408 | } | |
2409 | else if (et == elfcpp::ET_DYN) | |
2410 | { | |
dc3714f3 AM |
2411 | Powerpc_dynobj<size, big_endian>* obj = |
2412 | new Powerpc_dynobj<size, big_endian>(name, input_file, offset, ehdr); | |
cf43a2fe AM |
2413 | obj->setup(); |
2414 | return obj; | |
2415 | } | |
2416 | else | |
2417 | { | |
c9269dff | 2418 | gold_error(_("%s: unsupported ELF file type %d"), name.c_str(), et); |
cf43a2fe AM |
2419 | return NULL; |
2420 | } | |
2421 | } | |
2422 | ||
2423 | template<int size, bool big_endian> | |
2424 | class Output_data_got_powerpc : public Output_data_got<size, big_endian> | |
2425 | { | |
2426 | public: | |
2427 | typedef typename elfcpp::Elf_types<size>::Elf_Addr Valtype; | |
2428 | typedef Output_data_reloc<elfcpp::SHT_RELA, true, size, big_endian> Rela_dyn; | |
2429 | ||
2430 | Output_data_got_powerpc(Symbol_table* symtab, Layout* layout) | |
2431 | : Output_data_got<size, big_endian>(), | |
2432 | symtab_(symtab), layout_(layout), | |
2433 | header_ent_cnt_(size == 32 ? 3 : 1), | |
2434 | header_index_(size == 32 ? 0x2000 : 0) | |
751e4d66 AM |
2435 | { |
2436 | if (size == 64) | |
2437 | this->set_addralign(256); | |
2438 | } | |
cf43a2fe | 2439 | |
e84fe78f AM |
2440 | // Override all the Output_data_got methods we use so as to first call |
2441 | // reserve_ent(). | |
2442 | bool | |
2443 | add_global(Symbol* gsym, unsigned int got_type) | |
2444 | { | |
2445 | this->reserve_ent(); | |
2446 | return Output_data_got<size, big_endian>::add_global(gsym, got_type); | |
2447 | } | |
2448 | ||
2449 | bool | |
2450 | add_global_plt(Symbol* gsym, unsigned int got_type) | |
2451 | { | |
2452 | this->reserve_ent(); | |
2453 | return Output_data_got<size, big_endian>::add_global_plt(gsym, got_type); | |
2454 | } | |
2455 | ||
2456 | bool | |
2457 | add_global_tls(Symbol* gsym, unsigned int got_type) | |
2458 | { return this->add_global_plt(gsym, got_type); } | |
2459 | ||
2460 | void | |
2461 | add_global_with_rel(Symbol* gsym, unsigned int got_type, | |
2462 | Output_data_reloc_generic* rel_dyn, unsigned int r_type) | |
2463 | { | |
2464 | this->reserve_ent(); | |
2465 | Output_data_got<size, big_endian>:: | |
2466 | add_global_with_rel(gsym, got_type, rel_dyn, r_type); | |
2467 | } | |
2468 | ||
2469 | void | |
2470 | add_global_pair_with_rel(Symbol* gsym, unsigned int got_type, | |
2471 | Output_data_reloc_generic* rel_dyn, | |
2472 | unsigned int r_type_1, unsigned int r_type_2) | |
2473 | { | |
2474 | this->reserve_ent(2); | |
2475 | Output_data_got<size, big_endian>:: | |
2476 | add_global_pair_with_rel(gsym, got_type, rel_dyn, r_type_1, r_type_2); | |
2477 | } | |
2478 | ||
2479 | bool | |
2480 | add_local(Relobj* object, unsigned int sym_index, unsigned int got_type) | |
2481 | { | |
2482 | this->reserve_ent(); | |
2483 | return Output_data_got<size, big_endian>::add_local(object, sym_index, | |
2484 | got_type); | |
2485 | } | |
2486 | ||
2487 | bool | |
2488 | add_local_plt(Relobj* object, unsigned int sym_index, unsigned int got_type) | |
2489 | { | |
2490 | this->reserve_ent(); | |
2491 | return Output_data_got<size, big_endian>::add_local_plt(object, sym_index, | |
2492 | got_type); | |
2493 | } | |
2494 | ||
2495 | bool | |
2496 | add_local_tls(Relobj* object, unsigned int sym_index, unsigned int got_type) | |
2497 | { return this->add_local_plt(object, sym_index, got_type); } | |
2498 | ||
2499 | void | |
2500 | add_local_tls_pair(Relobj* object, unsigned int sym_index, | |
2501 | unsigned int got_type, | |
2502 | Output_data_reloc_generic* rel_dyn, | |
2503 | unsigned int r_type) | |
2504 | { | |
2505 | this->reserve_ent(2); | |
2506 | Output_data_got<size, big_endian>:: | |
2507 | add_local_tls_pair(object, sym_index, got_type, rel_dyn, r_type); | |
2508 | } | |
2509 | ||
2510 | unsigned int | |
2511 | add_constant(Valtype constant) | |
2512 | { | |
2513 | this->reserve_ent(); | |
2514 | return Output_data_got<size, big_endian>::add_constant(constant); | |
2515 | } | |
2516 | ||
dd93cd0a AM |
2517 | unsigned int |
2518 | add_constant_pair(Valtype c1, Valtype c2) | |
2519 | { | |
2520 | this->reserve_ent(2); | |
e84fe78f | 2521 | return Output_data_got<size, big_endian>::add_constant_pair(c1, c2); |
dd93cd0a AM |
2522 | } |
2523 | ||
2524 | // Offset of _GLOBAL_OFFSET_TABLE_. | |
cf43a2fe AM |
2525 | unsigned int |
2526 | g_o_t() const | |
2527 | { | |
2528 | return this->got_offset(this->header_index_); | |
42cacb20 | 2529 | } |
cf43a2fe | 2530 | |
dd93cd0a AM |
2531 | // Offset of base used to access the GOT/TOC. |
2532 | // The got/toc pointer reg will be set to this value. | |
26a4e9cb | 2533 | Valtype |
dd93cd0a AM |
2534 | got_base_offset(const Powerpc_relobj<size, big_endian>* object) const |
2535 | { | |
2536 | if (size == 32) | |
2537 | return this->g_o_t(); | |
2538 | else | |
2539 | return (this->output_section()->address() | |
2540 | + object->toc_base_offset() | |
2541 | - this->address()); | |
2542 | } | |
2543 | ||
cf43a2fe AM |
2544 | // Ensure our GOT has a header. |
2545 | void | |
2546 | set_final_data_size() | |
2547 | { | |
2548 | if (this->header_ent_cnt_ != 0) | |
2549 | this->make_header(); | |
2550 | Output_data_got<size, big_endian>::set_final_data_size(); | |
2551 | } | |
2552 | ||
2553 | // First word of GOT header needs some values that are not | |
2554 | // handled by Output_data_got so poke them in here. | |
2555 | // For 32-bit, address of .dynamic, for 64-bit, address of TOCbase. | |
2556 | void | |
2557 | do_write(Output_file* of) | |
2558 | { | |
c9824451 AM |
2559 | Valtype val = 0; |
2560 | if (size == 32 && this->layout_->dynamic_data() != NULL) | |
2561 | val = this->layout_->dynamic_section()->address(); | |
2562 | if (size == 64) | |
2563 | val = this->output_section()->address() + 0x8000; | |
2564 | this->replace_constant(this->header_index_, val); | |
cf43a2fe AM |
2565 | Output_data_got<size, big_endian>::do_write(of); |
2566 | } | |
2567 | ||
2568 | private: | |
2569 | void | |
2570 | reserve_ent(unsigned int cnt = 1) | |
2571 | { | |
2572 | if (this->header_ent_cnt_ == 0) | |
2573 | return; | |
2574 | if (this->num_entries() + cnt > this->header_index_) | |
2575 | this->make_header(); | |
2576 | } | |
2577 | ||
2578 | void | |
2579 | make_header() | |
2580 | { | |
2581 | this->header_ent_cnt_ = 0; | |
2582 | this->header_index_ = this->num_entries(); | |
2583 | if (size == 32) | |
2584 | { | |
2585 | Output_data_got<size, big_endian>::add_constant(0); | |
2586 | Output_data_got<size, big_endian>::add_constant(0); | |
2587 | Output_data_got<size, big_endian>::add_constant(0); | |
2588 | ||
2589 | // Define _GLOBAL_OFFSET_TABLE_ at the header | |
bb66a627 AM |
2590 | Symbol *gotsym = this->symtab_->lookup("_GLOBAL_OFFSET_TABLE_", NULL); |
2591 | if (gotsym != NULL) | |
2592 | { | |
2593 | Sized_symbol<size>* sym = static_cast<Sized_symbol<size>*>(gotsym); | |
2594 | sym->set_value(this->g_o_t()); | |
2595 | } | |
2596 | else | |
2597 | this->symtab_->define_in_output_data("_GLOBAL_OFFSET_TABLE_", NULL, | |
2598 | Symbol_table::PREDEFINED, | |
2599 | this, this->g_o_t(), 0, | |
2600 | elfcpp::STT_OBJECT, | |
2601 | elfcpp::STB_LOCAL, | |
2602 | elfcpp::STV_HIDDEN, 0, | |
2603 | false, false); | |
cf43a2fe AM |
2604 | } |
2605 | else | |
2606 | Output_data_got<size, big_endian>::add_constant(0); | |
2607 | } | |
2608 | ||
2609 | // Stashed pointers. | |
2610 | Symbol_table* symtab_; | |
2611 | Layout* layout_; | |
2612 | ||
2613 | // GOT header size. | |
2614 | unsigned int header_ent_cnt_; | |
2615 | // GOT header index. | |
2616 | unsigned int header_index_; | |
42cacb20 DE |
2617 | }; |
2618 | ||
2619 | // Get the GOT section, creating it if necessary. | |
2620 | ||
2621 | template<int size, bool big_endian> | |
cf43a2fe | 2622 | Output_data_got_powerpc<size, big_endian>* |
42cacb20 DE |
2623 | Target_powerpc<size, big_endian>::got_section(Symbol_table* symtab, |
2624 | Layout* layout) | |
2625 | { | |
2626 | if (this->got_ == NULL) | |
2627 | { | |
2628 | gold_assert(symtab != NULL && layout != NULL); | |
2629 | ||
cf43a2fe AM |
2630 | this->got_ |
2631 | = new Output_data_got_powerpc<size, big_endian>(symtab, layout); | |
42cacb20 DE |
2632 | |
2633 | layout->add_output_section_data(".got", elfcpp::SHT_PROGBITS, | |
2634 | elfcpp::SHF_ALLOC | elfcpp::SHF_WRITE, | |
22f0da72 | 2635 | this->got_, ORDER_DATA, false); |
42cacb20 DE |
2636 | } |
2637 | ||
2638 | return this->got_; | |
2639 | } | |
2640 | ||
2641 | // Get the dynamic reloc section, creating it if necessary. | |
2642 | ||
2643 | template<int size, bool big_endian> | |
2644 | typename Target_powerpc<size, big_endian>::Reloc_section* | |
2645 | Target_powerpc<size, big_endian>::rela_dyn_section(Layout* layout) | |
2646 | { | |
2647 | if (this->rela_dyn_ == NULL) | |
2648 | { | |
2649 | gold_assert(layout != NULL); | |
2650 | this->rela_dyn_ = new Reloc_section(parameters->options().combreloc()); | |
2651 | layout->add_output_section_data(".rela.dyn", elfcpp::SHT_RELA, | |
22f0da72 ILT |
2652 | elfcpp::SHF_ALLOC, this->rela_dyn_, |
2653 | ORDER_DYNAMIC_RELOCS, false); | |
42cacb20 DE |
2654 | } |
2655 | return this->rela_dyn_; | |
2656 | } | |
2657 | ||
b3ccdeb5 AM |
2658 | // Similarly, but for ifunc symbols get the one for ifunc. |
2659 | ||
2660 | template<int size, bool big_endian> | |
2661 | typename Target_powerpc<size, big_endian>::Reloc_section* | |
2662 | Target_powerpc<size, big_endian>::rela_dyn_section(Symbol_table* symtab, | |
2663 | Layout* layout, | |
2664 | bool for_ifunc) | |
2665 | { | |
2666 | if (!for_ifunc) | |
2667 | return this->rela_dyn_section(layout); | |
2668 | ||
2669 | if (this->iplt_ == NULL) | |
2670 | this->make_iplt_section(symtab, layout); | |
2671 | return this->iplt_->rel_plt(); | |
2672 | } | |
2673 | ||
ec661b9d AM |
2674 | class Stub_control |
2675 | { | |
2676 | public: | |
2677 | // Determine the stub group size. The group size is the absolute | |
2678 | // value of the parameter --stub-group-size. If --stub-group-size | |
a5018ae5 | 2679 | // is passed a negative value, we restrict stubs to be always after |
ec661b9d | 2680 | // the stubbed branches. |
1c3a5fbe AM |
2681 | Stub_control(int32_t size, bool no_size_errors, bool multi_os) |
2682 | : stub_group_size_(abs(size)), stubs_always_after_branch_(size < 0), | |
2683 | suppress_size_errors_(no_size_errors), multi_os_(multi_os), | |
2684 | state_(NO_GROUP), group_size_(0), group_start_addr_(0), | |
2685 | owner_(NULL), output_section_(NULL) | |
ec661b9d | 2686 | { |
ec661b9d AM |
2687 | } |
2688 | ||
2689 | // Return true iff input section can be handled by current stub | |
2690 | // group. | |
2691 | bool | |
2692 | can_add_to_stub_group(Output_section* o, | |
2693 | const Output_section::Input_section* i, | |
2694 | bool has14); | |
2695 | ||
2696 | const Output_section::Input_section* | |
2697 | owner() | |
2698 | { return owner_; } | |
2699 | ||
2700 | Output_section* | |
2701 | output_section() | |
2702 | { return output_section_; } | |
2703 | ||
a20605cf AM |
2704 | void |
2705 | set_output_and_owner(Output_section* o, | |
2706 | const Output_section::Input_section* i) | |
2707 | { | |
2708 | this->output_section_ = o; | |
2709 | this->owner_ = i; | |
2710 | } | |
2711 | ||
ec661b9d AM |
2712 | private: |
2713 | typedef enum | |
2714 | { | |
1c3a5fbe | 2715 | // Initial state. |
ec661b9d | 2716 | NO_GROUP, |
1c3a5fbe | 2717 | // Adding group sections before the stubs. |
ec661b9d | 2718 | FINDING_STUB_SECTION, |
1c3a5fbe | 2719 | // Adding group sections after the stubs. |
ec661b9d AM |
2720 | HAS_STUB_SECTION |
2721 | } State; | |
2722 | ||
ec661b9d | 2723 | uint32_t stub_group_size_; |
a5018ae5 | 2724 | bool stubs_always_after_branch_; |
ec661b9d | 2725 | bool suppress_size_errors_; |
1c3a5fbe AM |
2726 | // True if a stub group can serve multiple output sections. |
2727 | bool multi_os_; | |
2728 | State state_; | |
8a37735f AM |
2729 | // Current max size of group. Starts at stub_group_size_ but is |
2730 | // reduced to stub_group_size_/1024 on seeing a section with | |
2731 | // external conditional branches. | |
2732 | uint32_t group_size_; | |
a5018ae5 | 2733 | uint64_t group_start_addr_; |
57f6d32d AM |
2734 | // owner_ and output_section_ specify the section to which stubs are |
2735 | // attached. The stubs are placed at the end of this section. | |
ec661b9d AM |
2736 | const Output_section::Input_section* owner_; |
2737 | Output_section* output_section_; | |
2738 | }; | |
2739 | ||
0cfdc767 | 2740 | // Return true iff input section can be handled by current stub |
a5018ae5 AM |
2741 | // group. Sections are presented to this function in order, |
2742 | // so the first section is the head of the group. | |
ec661b9d AM |
2743 | |
2744 | bool | |
2745 | Stub_control::can_add_to_stub_group(Output_section* o, | |
2746 | const Output_section::Input_section* i, | |
2747 | bool has14) | |
2748 | { | |
ec661b9d AM |
2749 | bool whole_sec = o->order() == ORDER_INIT || o->order() == ORDER_FINI; |
2750 | uint64_t this_size; | |
2751 | uint64_t start_addr = o->address(); | |
2752 | ||
2753 | if (whole_sec) | |
2754 | // .init and .fini sections are pasted together to form a single | |
2755 | // function. We can't be adding stubs in the middle of the function. | |
2756 | this_size = o->data_size(); | |
2757 | else | |
2758 | { | |
2759 | start_addr += i->relobj()->output_section_offset(i->shndx()); | |
2760 | this_size = i->data_size(); | |
2761 | } | |
57f6d32d | 2762 | |
a5018ae5 | 2763 | uint64_t end_addr = start_addr + this_size; |
8a37735f AM |
2764 | uint32_t group_size = this->stub_group_size_; |
2765 | if (has14) | |
2766 | this->group_size_ = group_size = group_size >> 10; | |
ec661b9d | 2767 | |
57f6d32d | 2768 | if (this_size > group_size && !this->suppress_size_errors_) |
ec661b9d AM |
2769 | gold_warning(_("%s:%s exceeds group size"), |
2770 | i->relobj()->name().c_str(), | |
2771 | i->relobj()->section_name(i->shndx()).c_str()); | |
2772 | ||
afe002dd AM |
2773 | gold_debug(DEBUG_TARGET, "maybe add%s %s:%s size=%#llx total=%#llx", |
2774 | has14 ? " 14bit" : "", | |
2775 | i->relobj()->name().c_str(), | |
2776 | i->relobj()->section_name(i->shndx()).c_str(), | |
2777 | (long long) this_size, | |
a5018ae5 AM |
2778 | (this->state_ == NO_GROUP |
2779 | ? this_size | |
2780 | : (long long) end_addr - this->group_start_addr_)); | |
afe002dd | 2781 | |
1c3a5fbe AM |
2782 | if (this->state_ == NO_GROUP) |
2783 | { | |
2784 | // Only here on very first use of Stub_control | |
2785 | this->owner_ = i; | |
2786 | this->output_section_ = o; | |
2787 | this->state_ = FINDING_STUB_SECTION; | |
2788 | this->group_size_ = group_size; | |
2789 | this->group_start_addr_ = start_addr; | |
2790 | return true; | |
2791 | } | |
2792 | else if (!this->multi_os_ && this->output_section_ != o) | |
2793 | ; | |
2794 | else if (this->state_ == HAS_STUB_SECTION) | |
ec661b9d | 2795 | { |
a5018ae5 | 2796 | // Can we add this section, which is after the stubs, to the |
57f6d32d | 2797 | // group? |
a5018ae5 | 2798 | if (end_addr - this->group_start_addr_ <= this->group_size_) |
57f6d32d | 2799 | return true; |
ec661b9d | 2800 | } |
a5018ae5 | 2801 | else if (this->state_ == FINDING_STUB_SECTION) |
ec661b9d | 2802 | { |
a5018ae5 AM |
2803 | if ((whole_sec && this->output_section_ == o) |
2804 | || end_addr - this->group_start_addr_ <= this->group_size_) | |
57f6d32d | 2805 | { |
a5018ae5 | 2806 | // Stubs are added at the end of "owner_". |
57f6d32d AM |
2807 | this->owner_ = i; |
2808 | this->output_section_ = o; | |
a5018ae5 | 2809 | return true; |
57f6d32d | 2810 | } |
a5018ae5 AM |
2811 | // The group before the stubs has reached maximum size. |
2812 | // Now see about adding sections after the stubs to the | |
2813 | // group. If the current section has a 14-bit branch and | |
2814 | // the group before the stubs exceeds group_size_ (because | |
2815 | // they didn't have 14-bit branches), don't add sections | |
2816 | // after the stubs: The size of stubs for such a large | |
2817 | // group may exceed the reach of a 14-bit branch. | |
2818 | if (!this->stubs_always_after_branch_ | |
2819 | && this_size <= this->group_size_ | |
2820 | && start_addr - this->group_start_addr_ <= this->group_size_) | |
57f6d32d | 2821 | { |
a5018ae5 AM |
2822 | gold_debug(DEBUG_TARGET, "adding after stubs"); |
2823 | this->state_ = HAS_STUB_SECTION; | |
2824 | this->group_start_addr_ = start_addr; | |
57f6d32d AM |
2825 | return true; |
2826 | } | |
ec661b9d | 2827 | } |
a5018ae5 AM |
2828 | else |
2829 | gold_unreachable(); | |
57f6d32d | 2830 | |
1c3a5fbe AM |
2831 | gold_debug(DEBUG_TARGET, |
2832 | !this->multi_os_ && this->output_section_ != o | |
2833 | ? "nope, new output section\n" | |
2834 | : "nope, didn't fit\n"); | |
afe002dd | 2835 | |
57f6d32d AM |
2836 | // The section fails to fit in the current group. Set up a few |
2837 | // things for the next group. owner_ and output_section_ will be | |
2838 | // set later after we've retrieved those values for the current | |
2839 | // group. | |
2840 | this->state_ = FINDING_STUB_SECTION; | |
8a37735f | 2841 | this->group_size_ = group_size; |
a5018ae5 | 2842 | this->group_start_addr_ = start_addr; |
57f6d32d | 2843 | return false; |
ec661b9d AM |
2844 | } |
2845 | ||
2846 | // Look over all the input sections, deciding where to place stubs. | |
2847 | ||
2848 | template<int size, bool big_endian> | |
2849 | void | |
2850 | Target_powerpc<size, big_endian>::group_sections(Layout* layout, | |
a3e60ddb AM |
2851 | const Task*, |
2852 | bool no_size_errors) | |
ec661b9d | 2853 | { |
1c3a5fbe AM |
2854 | Stub_control stub_control(this->stub_group_size_, no_size_errors, |
2855 | parameters->options().stub_group_multi()); | |
ec661b9d AM |
2856 | |
2857 | // Group input sections and insert stub table | |
a3e60ddb AM |
2858 | Stub_table_owner* table_owner = NULL; |
2859 | std::vector<Stub_table_owner*> tables; | |
ec661b9d AM |
2860 | Layout::Section_list section_list; |
2861 | layout->get_executable_sections(§ion_list); | |
2862 | std::stable_sort(section_list.begin(), section_list.end(), Sort_sections()); | |
a5018ae5 AM |
2863 | for (Layout::Section_list::iterator o = section_list.begin(); |
2864 | o != section_list.end(); | |
ec661b9d AM |
2865 | ++o) |
2866 | { | |
2867 | typedef Output_section::Input_section_list Input_section_list; | |
a5018ae5 AM |
2868 | for (Input_section_list::const_iterator i |
2869 | = (*o)->input_sections().begin(); | |
2870 | i != (*o)->input_sections().end(); | |
ec661b9d AM |
2871 | ++i) |
2872 | { | |
a3e60ddb AM |
2873 | if (i->is_input_section() |
2874 | || i->is_relaxed_input_section()) | |
ec661b9d AM |
2875 | { |
2876 | Powerpc_relobj<size, big_endian>* ppcobj = static_cast | |
2877 | <Powerpc_relobj<size, big_endian>*>(i->relobj()); | |
2878 | bool has14 = ppcobj->has_14bit_branch(i->shndx()); | |
2879 | if (!stub_control.can_add_to_stub_group(*o, &*i, has14)) | |
2880 | { | |
a3e60ddb AM |
2881 | table_owner->output_section = stub_control.output_section(); |
2882 | table_owner->owner = stub_control.owner(); | |
a20605cf | 2883 | stub_control.set_output_and_owner(*o, &*i); |
a3e60ddb | 2884 | table_owner = NULL; |
ec661b9d | 2885 | } |
a3e60ddb AM |
2886 | if (table_owner == NULL) |
2887 | { | |
2888 | table_owner = new Stub_table_owner; | |
2889 | tables.push_back(table_owner); | |
2890 | } | |
2891 | ppcobj->set_stub_table(i->shndx(), tables.size() - 1); | |
ec661b9d AM |
2892 | } |
2893 | } | |
2894 | } | |
a3e60ddb | 2895 | if (table_owner != NULL) |
0cfdc767 | 2896 | { |
a5018ae5 AM |
2897 | table_owner->output_section = stub_control.output_section(); |
2898 | table_owner->owner = stub_control.owner();; | |
a3e60ddb AM |
2899 | } |
2900 | for (typename std::vector<Stub_table_owner*>::iterator t = tables.begin(); | |
2901 | t != tables.end(); | |
2902 | ++t) | |
2903 | { | |
2904 | Stub_table<size, big_endian>* stub_table; | |
2905 | ||
2906 | if ((*t)->owner->is_input_section()) | |
2907 | stub_table = new Stub_table<size, big_endian>(this, | |
2908 | (*t)->output_section, | |
590b87ff AM |
2909 | (*t)->owner, |
2910 | this->stub_tables_.size()); | |
a3e60ddb AM |
2911 | else if ((*t)->owner->is_relaxed_input_section()) |
2912 | stub_table = static_cast<Stub_table<size, big_endian>*>( | |
2913 | (*t)->owner->relaxed_input_section()); | |
0cfdc767 | 2914 | else |
a3e60ddb AM |
2915 | gold_unreachable(); |
2916 | this->stub_tables_.push_back(stub_table); | |
2917 | delete *t; | |
0cfdc767 | 2918 | } |
ec661b9d AM |
2919 | } |
2920 | ||
a3e60ddb AM |
2921 | static unsigned long |
2922 | max_branch_delta (unsigned int r_type) | |
2923 | { | |
2924 | if (r_type == elfcpp::R_POWERPC_REL14 | |
2925 | || r_type == elfcpp::R_POWERPC_REL14_BRTAKEN | |
2926 | || r_type == elfcpp::R_POWERPC_REL14_BRNTAKEN) | |
2927 | return 1L << 15; | |
2928 | if (r_type == elfcpp::R_POWERPC_REL24 | |
2929 | || r_type == elfcpp::R_PPC_PLTREL24 | |
2930 | || r_type == elfcpp::R_PPC_LOCAL24PC) | |
2931 | return 1L << 25; | |
2932 | return 0; | |
2933 | } | |
2934 | ||
7e57d19e AM |
2935 | // Return whether this branch is going via a plt call stub. |
2936 | ||
2937 | template<int size, bool big_endian> | |
2938 | bool | |
2939 | Target_powerpc<size, big_endian>::Branch_info::mark_pltcall( | |
2940 | Powerpc_relobj<size, big_endian>* ppc_object, | |
2941 | unsigned int shndx, | |
2942 | Address offset, | |
2943 | Target_powerpc* target, | |
2944 | Symbol_table* symtab) | |
2945 | { | |
2946 | if (this->object_ != ppc_object | |
2947 | || this->shndx_ != shndx | |
2948 | || this->offset_ != offset) | |
2949 | return false; | |
2950 | ||
2951 | Symbol* sym = this->object_->global_symbol(this->r_sym_); | |
2952 | if (sym != NULL && sym->is_forwarder()) | |
2953 | sym = symtab->resolve_forwards(sym); | |
2954 | const Sized_symbol<size>* gsym = static_cast<const Sized_symbol<size>*>(sym); | |
2955 | if (gsym != NULL | |
2956 | ? gsym->use_plt_offset(Scan::get_reference_flags(this->r_type_, target)) | |
2957 | : this->object_->local_has_plt_offset(this->r_sym_)) | |
2958 | { | |
2959 | this->tocsave_ = 1; | |
2960 | return true; | |
2961 | } | |
2962 | return false; | |
2963 | } | |
2964 | ||
ec661b9d AM |
2965 | // If this branch needs a plt call stub, or a long branch stub, make one. |
2966 | ||
2967 | template<int size, bool big_endian> | |
a3e60ddb | 2968 | bool |
ec661b9d AM |
2969 | Target_powerpc<size, big_endian>::Branch_info::make_stub( |
2970 | Stub_table<size, big_endian>* stub_table, | |
2971 | Stub_table<size, big_endian>* ifunc_stub_table, | |
2972 | Symbol_table* symtab) const | |
2973 | { | |
2974 | Symbol* sym = this->object_->global_symbol(this->r_sym_); | |
2975 | if (sym != NULL && sym->is_forwarder()) | |
2976 | sym = symtab->resolve_forwards(sym); | |
2977 | const Sized_symbol<size>* gsym = static_cast<const Sized_symbol<size>*>(sym); | |
88b8e639 AM |
2978 | Target_powerpc<size, big_endian>* target = |
2979 | static_cast<Target_powerpc<size, big_endian>*>( | |
2980 | parameters->sized_target<size, big_endian>()); | |
dc60b26d AM |
2981 | bool ok = true; |
2982 | ||
ec661b9d | 2983 | if (gsym != NULL |
88b8e639 | 2984 | ? gsym->use_plt_offset(Scan::get_reference_flags(this->r_type_, target)) |
ec661b9d AM |
2985 | : this->object_->local_has_plt_offset(this->r_sym_)) |
2986 | { | |
9055360d AM |
2987 | if (size == 64 |
2988 | && gsym != NULL | |
2989 | && target->abiversion() >= 2 | |
2990 | && !parameters->options().output_is_position_independent() | |
2991 | && !is_branch_reloc(this->r_type_)) | |
2992 | target->glink_section()->add_global_entry(gsym); | |
2993 | else | |
ec661b9d | 2994 | { |
9055360d AM |
2995 | if (stub_table == NULL) |
2996 | stub_table = this->object_->stub_table(this->shndx_); | |
2997 | if (stub_table == NULL) | |
2998 | { | |
2999 | // This is a ref from a data section to an ifunc symbol. | |
3000 | stub_table = ifunc_stub_table; | |
3001 | } | |
3002 | gold_assert(stub_table != NULL); | |
a3e60ddb AM |
3003 | Address from = this->object_->get_output_section_offset(this->shndx_); |
3004 | if (from != invalid_address) | |
3005 | from += (this->object_->output_section(this->shndx_)->address() | |
3006 | + this->offset_); | |
9055360d | 3007 | if (gsym != NULL) |
dc60b26d AM |
3008 | ok = stub_table->add_plt_call_entry(from, |
3009 | this->object_, gsym, | |
7e57d19e AM |
3010 | this->r_type_, this->addend_, |
3011 | this->tocsave_); | |
9055360d | 3012 | else |
dc60b26d AM |
3013 | ok = stub_table->add_plt_call_entry(from, |
3014 | this->object_, this->r_sym_, | |
7e57d19e AM |
3015 | this->r_type_, this->addend_, |
3016 | this->tocsave_); | |
ec661b9d | 3017 | } |
ec661b9d AM |
3018 | } |
3019 | else | |
3020 | { | |
cbcb23fa | 3021 | Address max_branch_offset = max_branch_delta(this->r_type_); |
a3e60ddb AM |
3022 | if (max_branch_offset == 0) |
3023 | return true; | |
ec661b9d AM |
3024 | Address from = this->object_->get_output_section_offset(this->shndx_); |
3025 | gold_assert(from != invalid_address); | |
3026 | from += (this->object_->output_section(this->shndx_)->address() | |
3027 | + this->offset_); | |
3028 | Address to; | |
3029 | if (gsym != NULL) | |
3030 | { | |
3031 | switch (gsym->source()) | |
3032 | { | |
3033 | case Symbol::FROM_OBJECT: | |
3034 | { | |
3035 | Object* symobj = gsym->object(); | |
3036 | if (symobj->is_dynamic() | |
3037 | || symobj->pluginobj() != NULL) | |
a3e60ddb | 3038 | return true; |
ec661b9d AM |
3039 | bool is_ordinary; |
3040 | unsigned int shndx = gsym->shndx(&is_ordinary); | |
3041 | if (shndx == elfcpp::SHN_UNDEF) | |
a3e60ddb | 3042 | return true; |
ec661b9d AM |
3043 | } |
3044 | break; | |
3045 | ||
3046 | case Symbol::IS_UNDEFINED: | |
a3e60ddb | 3047 | return true; |
ec661b9d AM |
3048 | |
3049 | default: | |
3050 | break; | |
3051 | } | |
3052 | Symbol_table::Compute_final_value_status status; | |
3053 | to = symtab->compute_final_value<size>(gsym, &status); | |
3054 | if (status != Symbol_table::CFVS_OK) | |
a3e60ddb | 3055 | return true; |
9055360d AM |
3056 | if (size == 64) |
3057 | to += this->object_->ppc64_local_entry_offset(gsym); | |
ec661b9d AM |
3058 | } |
3059 | else | |
3060 | { | |
3061 | const Symbol_value<size>* psymval | |
3062 | = this->object_->local_symbol(this->r_sym_); | |
3063 | Symbol_value<size> symval; | |
0f125432 CC |
3064 | if (psymval->is_section_symbol()) |
3065 | symval.set_is_section_symbol(); | |
ec661b9d AM |
3066 | typedef Sized_relobj_file<size, big_endian> ObjType; |
3067 | typename ObjType::Compute_final_local_value_status status | |
3068 | = this->object_->compute_final_local_value(this->r_sym_, psymval, | |
3069 | &symval, symtab); | |
3070 | if (status != ObjType::CFLV_OK | |
3071 | || !symval.has_output_value()) | |
a3e60ddb | 3072 | return true; |
ec661b9d | 3073 | to = symval.value(this->object_, 0); |
9055360d AM |
3074 | if (size == 64) |
3075 | to += this->object_->ppc64_local_entry_offset(this->r_sym_); | |
ec661b9d | 3076 | } |
cbcb23fa AM |
3077 | if (!(size == 32 && this->r_type_ == elfcpp::R_PPC_PLTREL24)) |
3078 | to += this->addend_; | |
ec661b9d AM |
3079 | if (stub_table == NULL) |
3080 | stub_table = this->object_->stub_table(this->shndx_); | |
9055360d | 3081 | if (size == 64 && target->abiversion() < 2) |
ec661b9d AM |
3082 | { |
3083 | unsigned int dest_shndx; | |
1611bc4a AM |
3084 | if (!target->symval_for_branch(symtab, gsym, this->object_, |
3085 | &to, &dest_shndx)) | |
3086 | return true; | |
ec661b9d AM |
3087 | } |
3088 | Address delta = to - from; | |
3089 | if (delta + max_branch_offset >= 2 * max_branch_offset) | |
3090 | { | |
0cfdc767 AM |
3091 | if (stub_table == NULL) |
3092 | { | |
3093 | gold_warning(_("%s:%s: branch in non-executable section," | |
3094 | " no long branch stub for you"), | |
3095 | this->object_->name().c_str(), | |
3096 | this->object_->section_name(this->shndx_).c_str()); | |
a3e60ddb | 3097 | return true; |
0cfdc767 | 3098 | } |
d49044c7 AM |
3099 | bool save_res = (size == 64 |
3100 | && gsym != NULL | |
3101 | && gsym->source() == Symbol::IN_OUTPUT_DATA | |
3102 | && gsym->output_data() == target->savres_section()); | |
dc60b26d AM |
3103 | ok = stub_table->add_long_branch_entry(this->object_, |
3104 | this->r_type_, | |
3105 | from, to, save_res); | |
ec661b9d AM |
3106 | } |
3107 | } | |
dc60b26d AM |
3108 | if (!ok) |
3109 | gold_debug(DEBUG_TARGET, | |
3110 | "branch at %s:%s+%#lx\n" | |
3111 | "can't reach stub attached to %s:%s", | |
3112 | this->object_->name().c_str(), | |
3113 | this->object_->section_name(this->shndx_).c_str(), | |
3114 | (unsigned long) this->offset_, | |
3115 | stub_table->relobj()->name().c_str(), | |
3116 | stub_table->relobj()->section_name(stub_table->shndx()).c_str()); | |
3117 | ||
3118 | return ok; | |
ec661b9d AM |
3119 | } |
3120 | ||
3121 | // Relaxation hook. This is where we do stub generation. | |
3122 | ||
3123 | template<int size, bool big_endian> | |
3124 | bool | |
3125 | Target_powerpc<size, big_endian>::do_relax(int pass, | |
3126 | const Input_objects*, | |
3127 | Symbol_table* symtab, | |
3128 | Layout* layout, | |
3129 | const Task* task) | |
3130 | { | |
3131 | unsigned int prev_brlt_size = 0; | |
3132 | if (pass == 1) | |
ec661b9d | 3133 | { |
b4f7960d AM |
3134 | bool thread_safe |
3135 | = this->abiversion() < 2 && parameters->options().plt_thread_safe(); | |
3136 | if (size == 64 | |
3137 | && this->abiversion() < 2 | |
3138 | && !thread_safe | |
3139 | && !parameters->options().user_set_plt_thread_safe()) | |
ec661b9d | 3140 | { |
e2458743 | 3141 | static const char* const thread_starter[] = |
9e69ed50 AM |
3142 | { |
3143 | "pthread_create", | |
3144 | /* libstdc++ */ | |
3145 | "_ZNSt6thread15_M_start_threadESt10shared_ptrINS_10_Impl_baseEE", | |
3146 | /* librt */ | |
3147 | "aio_init", "aio_read", "aio_write", "aio_fsync", "lio_listio", | |
3148 | "mq_notify", "create_timer", | |
3149 | /* libanl */ | |
3150 | "getaddrinfo_a", | |
3151 | /* libgomp */ | |
80272b8c | 3152 | "GOMP_parallel", |
9e69ed50 | 3153 | "GOMP_parallel_start", |
80272b8c | 3154 | "GOMP_parallel_loop_static", |
9e69ed50 | 3155 | "GOMP_parallel_loop_static_start", |
80272b8c | 3156 | "GOMP_parallel_loop_dynamic", |
9e69ed50 | 3157 | "GOMP_parallel_loop_dynamic_start", |
80272b8c | 3158 | "GOMP_parallel_loop_guided", |
9e69ed50 | 3159 | "GOMP_parallel_loop_guided_start", |
80272b8c | 3160 | "GOMP_parallel_loop_runtime", |
9e69ed50 | 3161 | "GOMP_parallel_loop_runtime_start", |
80272b8c | 3162 | "GOMP_parallel_sections", |
43819297 | 3163 | "GOMP_parallel_sections_start", |
f9dffbf0 AM |
3164 | /* libgo */ |
3165 | "__go_go", | |
9e69ed50 AM |
3166 | }; |
3167 | ||
e2458743 AM |
3168 | if (parameters->options().shared()) |
3169 | thread_safe = true; | |
3170 | else | |
9e69ed50 | 3171 | { |
e2458743 AM |
3172 | for (unsigned int i = 0; |
3173 | i < sizeof(thread_starter) / sizeof(thread_starter[0]); | |
3174 | i++) | |
3175 | { | |
3176 | Symbol* sym = symtab->lookup(thread_starter[i], NULL); | |
3177 | thread_safe = (sym != NULL | |
3178 | && sym->in_reg() | |
3179 | && sym->in_real_elf()); | |
3180 | if (thread_safe) | |
3181 | break; | |
3182 | } | |
9e69ed50 | 3183 | } |
ec661b9d | 3184 | } |
9e69ed50 | 3185 | this->plt_thread_safe_ = thread_safe; |
a3e60ddb AM |
3186 | } |
3187 | ||
3188 | if (pass == 1) | |
3189 | { | |
3190 | this->stub_group_size_ = parameters->options().stub_group_size(); | |
3191 | bool no_size_errors = true; | |
3192 | if (this->stub_group_size_ == 1) | |
3193 | this->stub_group_size_ = 0x1c00000; | |
3194 | else if (this->stub_group_size_ == -1) | |
3195 | this->stub_group_size_ = -0x1e00000; | |
3196 | else | |
3197 | no_size_errors = false; | |
3198 | this->group_sections(layout, task, no_size_errors); | |
3199 | } | |
3200 | else if (this->relax_failed_ && this->relax_fail_count_ < 3) | |
3201 | { | |
3202 | this->branch_lookup_table_.clear(); | |
3203 | for (typename Stub_tables::iterator p = this->stub_tables_.begin(); | |
3204 | p != this->stub_tables_.end(); | |
3205 | ++p) | |
3206 | { | |
3207 | (*p)->clear_stubs(true); | |
3208 | } | |
3209 | this->stub_tables_.clear(); | |
3210 | this->stub_group_size_ = this->stub_group_size_ / 4 * 3; | |
57f6d32d | 3211 | gold_info(_("%s: stub group size is too large; retrying with %#x"), |
a3e60ddb AM |
3212 | program_name, this->stub_group_size_); |
3213 | this->group_sections(layout, task, true); | |
ec661b9d AM |
3214 | } |
3215 | ||
3216 | // We need address of stub tables valid for make_stub. | |
3217 | for (typename Stub_tables::iterator p = this->stub_tables_.begin(); | |
3218 | p != this->stub_tables_.end(); | |
3219 | ++p) | |
3220 | { | |
3221 | const Powerpc_relobj<size, big_endian>* object | |
3222 | = static_cast<const Powerpc_relobj<size, big_endian>*>((*p)->relobj()); | |
3223 | Address off = object->get_output_section_offset((*p)->shndx()); | |
3224 | gold_assert(off != invalid_address); | |
3225 | Output_section* os = (*p)->output_section(); | |
3226 | (*p)->set_address_and_size(os, off); | |
3227 | } | |
3228 | ||
9e69ed50 AM |
3229 | if (pass != 1) |
3230 | { | |
3231 | // Clear plt call stubs, long branch stubs and branch lookup table. | |
3232 | prev_brlt_size = this->branch_lookup_table_.size(); | |
3233 | this->branch_lookup_table_.clear(); | |
3234 | for (typename Stub_tables::iterator p = this->stub_tables_.begin(); | |
3235 | p != this->stub_tables_.end(); | |
3236 | ++p) | |
3237 | { | |
a3e60ddb | 3238 | (*p)->clear_stubs(false); |
9e69ed50 AM |
3239 | } |
3240 | } | |
3241 | ||
3242 | // Build all the stubs. | |
a3e60ddb | 3243 | this->relax_failed_ = false; |
ec661b9d AM |
3244 | Stub_table<size, big_endian>* ifunc_stub_table |
3245 | = this->stub_tables_.size() == 0 ? NULL : this->stub_tables_[0]; | |
3246 | Stub_table<size, big_endian>* one_stub_table | |
3247 | = this->stub_tables_.size() != 1 ? NULL : ifunc_stub_table; | |
3248 | for (typename Branches::const_iterator b = this->branch_info_.begin(); | |
3249 | b != this->branch_info_.end(); | |
3250 | b++) | |
3251 | { | |
a3e60ddb AM |
3252 | if (!b->make_stub(one_stub_table, ifunc_stub_table, symtab) |
3253 | && !this->relax_failed_) | |
3254 | { | |
3255 | this->relax_failed_ = true; | |
3256 | this->relax_fail_count_++; | |
3257 | if (this->relax_fail_count_ < 3) | |
3258 | return true; | |
3259 | } | |
ec661b9d AM |
3260 | } |
3261 | ||
9e69ed50 | 3262 | // Did anything change size? |
ec661b9d AM |
3263 | unsigned int num_huge_branches = this->branch_lookup_table_.size(); |
3264 | bool again = num_huge_branches != prev_brlt_size; | |
3265 | if (size == 64 && num_huge_branches != 0) | |
3266 | this->make_brlt_section(layout); | |
3267 | if (size == 64 && again) | |
3268 | this->brlt_section_->set_current_size(num_huge_branches); | |
3269 | ||
3270 | typedef Unordered_set<Output_section*> Output_sections; | |
3271 | Output_sections os_need_update; | |
3272 | for (typename Stub_tables::iterator p = this->stub_tables_.begin(); | |
3273 | p != this->stub_tables_.end(); | |
3274 | ++p) | |
3275 | { | |
3276 | if ((*p)->size_update()) | |
3277 | { | |
3278 | again = true; | |
9d5781f8 | 3279 | (*p)->add_eh_frame(layout); |
ec661b9d AM |
3280 | os_need_update.insert((*p)->output_section()); |
3281 | } | |
3282 | } | |
3283 | ||
9e69ed50 AM |
3284 | // Set output section offsets for all input sections in an output |
3285 | // section that just changed size. Anything past the stubs will | |
3286 | // need updating. | |
ec661b9d AM |
3287 | for (typename Output_sections::iterator p = os_need_update.begin(); |
3288 | p != os_need_update.end(); | |
3289 | p++) | |
3290 | { | |
3291 | Output_section* os = *p; | |
3292 | Address off = 0; | |
3293 | typedef Output_section::Input_section_list Input_section_list; | |
3294 | for (Input_section_list::const_iterator i = os->input_sections().begin(); | |
3295 | i != os->input_sections().end(); | |
3296 | ++i) | |
3297 | { | |
3298 | off = align_address(off, i->addralign()); | |
3299 | if (i->is_input_section() || i->is_relaxed_input_section()) | |
3300 | i->relobj()->set_section_offset(i->shndx(), off); | |
3301 | if (i->is_relaxed_input_section()) | |
3302 | { | |
3303 | Stub_table<size, big_endian>* stub_table | |
3304 | = static_cast<Stub_table<size, big_endian>*>( | |
3305 | i->relaxed_input_section()); | |
6395d38b HS |
3306 | Address stub_table_size = stub_table->set_address_and_size(os, off); |
3307 | off += stub_table_size; | |
3308 | // After a few iterations, set current stub table size | |
3309 | // as min size threshold, so later stub tables can only | |
3310 | // grow in size. | |
3311 | if (pass >= 4) | |
3312 | stub_table->set_min_size_threshold(stub_table_size); | |
ec661b9d AM |
3313 | } |
3314 | else | |
3315 | off += i->data_size(); | |
3316 | } | |
6830ee24 AM |
3317 | // If .branch_lt is part of this output section, then we have |
3318 | // just done the offset adjustment. | |
ec661b9d AM |
3319 | os->clear_section_offsets_need_adjustment(); |
3320 | } | |
3321 | ||
3322 | if (size == 64 | |
3323 | && !again | |
3324 | && num_huge_branches != 0 | |
3325 | && parameters->options().output_is_position_independent()) | |
3326 | { | |
3327 | // Fill in the BRLT relocs. | |
06f30c9d | 3328 | this->brlt_section_->reset_brlt_sizes(); |
ec661b9d AM |
3329 | for (typename Branch_lookup_table::const_iterator p |
3330 | = this->branch_lookup_table_.begin(); | |
3331 | p != this->branch_lookup_table_.end(); | |
3332 | ++p) | |
3333 | { | |
3334 | this->brlt_section_->add_reloc(p->first, p->second); | |
3335 | } | |
06f30c9d | 3336 | this->brlt_section_->finalize_brlt_sizes(); |
ec661b9d | 3337 | } |
590b87ff AM |
3338 | |
3339 | if (!again | |
3340 | && (parameters->options().user_set_emit_stub_syms() | |
3341 | ? parameters->options().emit_stub_syms() | |
3342 | : (size == 64 | |
3343 | || parameters->options().output_is_position_independent() | |
3344 | || parameters->options().emit_relocs()))) | |
3345 | { | |
3346 | for (typename Stub_tables::iterator p = this->stub_tables_.begin(); | |
3347 | p != this->stub_tables_.end(); | |
3348 | ++p) | |
3349 | (*p)->define_stub_syms(symtab); | |
3350 | ||
3351 | if (this->glink_ != NULL) | |
3352 | { | |
3353 | int stub_size = this->glink_->pltresolve_size; | |
3354 | Address value = -stub_size; | |
3355 | if (size == 64) | |
3356 | { | |
3357 | value = 8; | |
3358 | stub_size -= 8; | |
3359 | } | |
3360 | this->define_local(symtab, "__glink_PLTresolve", | |
3361 | this->glink_, value, stub_size); | |
3362 | ||
3363 | if (size != 64) | |
3364 | this->define_local(symtab, "__glink", this->glink_, 0, 0); | |
3365 | } | |
3366 | } | |
3367 | ||
ec661b9d AM |
3368 | return again; |
3369 | } | |
3370 | ||
9d5781f8 AM |
3371 | template<int size, bool big_endian> |
3372 | void | |
3373 | Target_powerpc<size, big_endian>::do_plt_fde_location(const Output_data* plt, | |
3374 | unsigned char* oview, | |
3375 | uint64_t* paddress, | |
3376 | off_t* plen) const | |
3377 | { | |
3378 | uint64_t address = plt->address(); | |
3379 | off_t len = plt->data_size(); | |
3380 | ||
3381 | if (plt == this->glink_) | |
3382 | { | |
3383 | // See Output_data_glink::do_write() for glink contents. | |
5fe7ffdc AM |
3384 | if (len == 0) |
3385 | { | |
3386 | gold_assert(parameters->doing_static_link()); | |
3387 | // Static linking may need stubs, to support ifunc and long | |
3388 | // branches. We need to create an output section for | |
3389 | // .eh_frame early in the link process, to have a place to | |
3390 | // attach stub .eh_frame info. We also need to have | |
3391 | // registered a CIE that matches the stub CIE. Both of | |
3392 | // these requirements are satisfied by creating an FDE and | |
3393 | // CIE for .glink, even though static linking will leave | |
3394 | // .glink zero length. | |
3395 | // ??? Hopefully generating an FDE with a zero address range | |
3396 | // won't confuse anything that consumes .eh_frame info. | |
3397 | } | |
3398 | else if (size == 64) | |
9d5781f8 AM |
3399 | { |
3400 | // There is one word before __glink_PLTresolve | |
3401 | address += 8; | |
3402 | len -= 8; | |
3403 | } | |
3404 | else if (parameters->options().output_is_position_independent()) | |
3405 | { | |
3406 | // There are two FDEs for a position independent glink. | |
3407 | // The first covers the branch table, the second | |
3408 | // __glink_PLTresolve at the end of glink. | |
3409 | off_t resolve_size = this->glink_->pltresolve_size; | |
5fe7ffdc | 3410 | if (oview[9] == elfcpp::DW_CFA_nop) |
9d5781f8 AM |
3411 | len -= resolve_size; |
3412 | else | |
3413 | { | |
3414 | address += len - resolve_size; | |
3415 | len = resolve_size; | |
3416 | } | |
3417 | } | |
3418 | } | |
3419 | else | |
3420 | { | |
3421 | // Must be a stub table. | |
3422 | const Stub_table<size, big_endian>* stub_table | |
3423 | = static_cast<const Stub_table<size, big_endian>*>(plt); | |
3424 | uint64_t stub_address = stub_table->stub_address(); | |
3425 | len -= stub_address - address; | |
3426 | address = stub_address; | |
3427 | } | |
3428 | ||
3429 | *paddress = address; | |
3430 | *plen = len; | |
3431 | } | |
3432 | ||
42cacb20 DE |
3433 | // A class to handle the PLT data. |
3434 | ||
3435 | template<int size, bool big_endian> | |
cf43a2fe | 3436 | class Output_data_plt_powerpc : public Output_section_data_build |
42cacb20 DE |
3437 | { |
3438 | public: | |
3439 | typedef Output_data_reloc<elfcpp::SHT_RELA, true, | |
3440 | size, big_endian> Reloc_section; | |
3441 | ||
e5d5f5ed AM |
3442 | Output_data_plt_powerpc(Target_powerpc<size, big_endian>* targ, |
3443 | Reloc_section* plt_rel, | |
e5d5f5ed AM |
3444 | const char* name) |
3445 | : Output_section_data_build(size == 32 ? 4 : 8), | |
3446 | rel_(plt_rel), | |
3447 | targ_(targ), | |
e5d5f5ed AM |
3448 | name_(name) |
3449 | { } | |
42cacb20 DE |
3450 | |
3451 | // Add an entry to the PLT. | |
03e25981 | 3452 | void |
cf43a2fe | 3453 | add_entry(Symbol*); |
42cacb20 | 3454 | |
03e25981 | 3455 | void |
e5d5f5ed AM |
3456 | add_ifunc_entry(Symbol*); |
3457 | ||
03e25981 | 3458 | void |
e5d5f5ed AM |
3459 | add_local_ifunc_entry(Sized_relobj_file<size, big_endian>*, unsigned int); |
3460 | ||
42cacb20 | 3461 | // Return the .rela.plt section data. |
e5d5f5ed | 3462 | Reloc_section* |
cf43a2fe AM |
3463 | rel_plt() const |
3464 | { | |
42cacb20 DE |
3465 | return this->rel_; |
3466 | } | |
3467 | ||
0e70b911 CC |
3468 | // Return the number of PLT entries. |
3469 | unsigned int | |
3470 | entry_count() const | |
d83ce4e3 | 3471 | { |
b3ccdeb5 AM |
3472 | if (this->current_data_size() == 0) |
3473 | return 0; | |
b4f7960d AM |
3474 | return ((this->current_data_size() - this->first_plt_entry_offset()) |
3475 | / this->plt_entry_size()); | |
d83ce4e3 | 3476 | } |
0e70b911 | 3477 | |
42cacb20 | 3478 | protected: |
42cacb20 | 3479 | void |
cf43a2fe | 3480 | do_adjust_output_section(Output_section* os) |
42cacb20 | 3481 | { |
cf43a2fe | 3482 | os->set_entsize(0); |
42cacb20 DE |
3483 | } |
3484 | ||
6ce78956 AM |
3485 | // Write to a map file. |
3486 | void | |
3487 | do_print_to_mapfile(Mapfile* mapfile) const | |
e5d5f5ed | 3488 | { mapfile->print_output_data(this, this->name_); } |
6ce78956 | 3489 | |
cf43a2fe | 3490 | private: |
b4f7960d AM |
3491 | // Return the offset of the first non-reserved PLT entry. |
3492 | unsigned int | |
3493 | first_plt_entry_offset() const | |
3494 | { | |
3495 | // IPLT has no reserved entry. | |
3496 | if (this->name_[3] == 'I') | |
3497 | return 0; | |
3498 | return this->targ_->first_plt_entry_offset(); | |
3499 | } | |
3500 | ||
3501 | // Return the size of each PLT entry. | |
3502 | unsigned int | |
3503 | plt_entry_size() const | |
3504 | { | |
3505 | return this->targ_->plt_entry_size(); | |
3506 | } | |
cf43a2fe | 3507 | |
42cacb20 DE |
3508 | // Write out the PLT data. |
3509 | void | |
3510 | do_write(Output_file*); | |
3511 | ||
3512 | // The reloc section. | |
3513 | Reloc_section* rel_; | |
cf43a2fe AM |
3514 | // Allows access to .glink for do_write. |
3515 | Target_powerpc<size, big_endian>* targ_; | |
e5d5f5ed AM |
3516 | // What to report in map file. |
3517 | const char *name_; | |
42cacb20 DE |
3518 | }; |
3519 | ||
e5d5f5ed | 3520 | // Add an entry to the PLT. |
42cacb20 DE |
3521 | |
3522 | template<int size, bool big_endian> | |
03e25981 | 3523 | void |
e5d5f5ed | 3524 | Output_data_plt_powerpc<size, big_endian>::add_entry(Symbol* gsym) |
42cacb20 | 3525 | { |
e5d5f5ed AM |
3526 | if (!gsym->has_plt_offset()) |
3527 | { | |
ec661b9d | 3528 | section_size_type off = this->current_data_size(); |
e5d5f5ed AM |
3529 | if (off == 0) |
3530 | off += this->first_plt_entry_offset(); | |
3531 | gsym->set_plt_offset(off); | |
3532 | gsym->set_needs_dynsym_entry(); | |
3533 | unsigned int dynrel = elfcpp::R_POWERPC_JMP_SLOT; | |
3534 | this->rel_->add_global(gsym, dynrel, this, off, 0); | |
b4f7960d | 3535 | off += this->plt_entry_size(); |
e5d5f5ed AM |
3536 | this->set_current_data_size(off); |
3537 | } | |
42cacb20 DE |
3538 | } |
3539 | ||
e5d5f5ed | 3540 | // Add an entry for a global ifunc symbol that resolves locally, to the IPLT. |
42cacb20 DE |
3541 | |
3542 | template<int size, bool big_endian> | |
03e25981 | 3543 | void |
e5d5f5ed | 3544 | Output_data_plt_powerpc<size, big_endian>::add_ifunc_entry(Symbol* gsym) |
42cacb20 | 3545 | { |
cf43a2fe AM |
3546 | if (!gsym->has_plt_offset()) |
3547 | { | |
ec661b9d | 3548 | section_size_type off = this->current_data_size(); |
cf43a2fe | 3549 | gsym->set_plt_offset(off); |
e5d5f5ed | 3550 | unsigned int dynrel = elfcpp::R_POWERPC_IRELATIVE; |
b4f7960d | 3551 | if (size == 64 && this->targ_->abiversion() < 2) |
e5d5f5ed AM |
3552 | dynrel = elfcpp::R_PPC64_JMP_IREL; |
3553 | this->rel_->add_symbolless_global_addend(gsym, dynrel, this, off, 0); | |
b4f7960d | 3554 | off += this->plt_entry_size(); |
e5d5f5ed AM |
3555 | this->set_current_data_size(off); |
3556 | } | |
3557 | } | |
3558 | ||
3559 | // Add an entry for a local ifunc symbol to the IPLT. | |
3560 | ||
3561 | template<int size, bool big_endian> | |
03e25981 | 3562 | void |
e5d5f5ed AM |
3563 | Output_data_plt_powerpc<size, big_endian>::add_local_ifunc_entry( |
3564 | Sized_relobj_file<size, big_endian>* relobj, | |
3565 | unsigned int local_sym_index) | |
3566 | { | |
3567 | if (!relobj->local_has_plt_offset(local_sym_index)) | |
3568 | { | |
ec661b9d | 3569 | section_size_type off = this->current_data_size(); |
e5d5f5ed AM |
3570 | relobj->set_local_plt_offset(local_sym_index, off); |
3571 | unsigned int dynrel = elfcpp::R_POWERPC_IRELATIVE; | |
b4f7960d | 3572 | if (size == 64 && this->targ_->abiversion() < 2) |
e5d5f5ed AM |
3573 | dynrel = elfcpp::R_PPC64_JMP_IREL; |
3574 | this->rel_->add_symbolless_local_addend(relobj, local_sym_index, dynrel, | |
3575 | this, off, 0); | |
b4f7960d | 3576 | off += this->plt_entry_size(); |
cf43a2fe AM |
3577 | this->set_current_data_size(off); |
3578 | } | |
42cacb20 DE |
3579 | } |
3580 | ||
dd93cd0a | 3581 | static const uint32_t add_0_11_11 = 0x7c0b5a14; |
9e69ed50 | 3582 | static const uint32_t add_2_2_11 = 0x7c425a14; |
549dba71 | 3583 | static const uint32_t add_2_2_12 = 0x7c426214; |
dd93cd0a AM |
3584 | static const uint32_t add_3_3_2 = 0x7c631214; |
3585 | static const uint32_t add_3_3_13 = 0x7c636a14; | |
3586 | static const uint32_t add_11_0_11 = 0x7d605a14; | |
b4f7960d AM |
3587 | static const uint32_t add_11_2_11 = 0x7d625a14; |
3588 | static const uint32_t add_11_11_2 = 0x7d6b1214; | |
3589 | static const uint32_t addi_0_12 = 0x380c0000; | |
dd93cd0a | 3590 | static const uint32_t addi_2_2 = 0x38420000; |
dd93cd0a | 3591 | static const uint32_t addi_3_3 = 0x38630000; |
b4f7960d | 3592 | static const uint32_t addi_11_11 = 0x396b0000; |
bbec1a5d | 3593 | static const uint32_t addi_12_1 = 0x39810000; |
b4f7960d | 3594 | static const uint32_t addi_12_12 = 0x398c0000; |
dd93cd0a AM |
3595 | static const uint32_t addis_0_2 = 0x3c020000; |
3596 | static const uint32_t addis_0_13 = 0x3c0d0000; | |
bbec1a5d | 3597 | static const uint32_t addis_2_12 = 0x3c4c0000; |
b4f7960d | 3598 | static const uint32_t addis_11_2 = 0x3d620000; |
c9269dff AM |
3599 | static const uint32_t addis_11_11 = 0x3d6b0000; |
3600 | static const uint32_t addis_11_30 = 0x3d7e0000; | |
bbec1a5d | 3601 | static const uint32_t addis_12_1 = 0x3d810000; |
397998fc | 3602 | static const uint32_t addis_12_2 = 0x3d820000; |
c9269dff | 3603 | static const uint32_t addis_12_12 = 0x3d8c0000; |
c9269dff AM |
3604 | static const uint32_t b = 0x48000000; |
3605 | static const uint32_t bcl_20_31 = 0x429f0005; | |
3606 | static const uint32_t bctr = 0x4e800420; | |
f3a0ed29 | 3607 | static const uint32_t blr = 0x4e800020; |
9e69ed50 | 3608 | static const uint32_t bnectr_p4 = 0x4ce20420; |
bbec1a5d | 3609 | static const uint32_t cmpld_7_12_0 = 0x7fac0040; |
9e69ed50 | 3610 | static const uint32_t cmpldi_2_0 = 0x28220000; |
dd93cd0a AM |
3611 | static const uint32_t cror_15_15_15 = 0x4def7b82; |
3612 | static const uint32_t cror_31_31_31 = 0x4ffffb82; | |
f3a0ed29 AM |
3613 | static const uint32_t ld_0_1 = 0xe8010000; |
3614 | static const uint32_t ld_0_12 = 0xe80c0000; | |
dd93cd0a | 3615 | static const uint32_t ld_2_1 = 0xe8410000; |
dd93cd0a | 3616 | static const uint32_t ld_2_2 = 0xe8420000; |
b4f7960d | 3617 | static const uint32_t ld_2_11 = 0xe84b0000; |
549dba71 | 3618 | static const uint32_t ld_2_12 = 0xe84c0000; |
b4f7960d AM |
3619 | static const uint32_t ld_11_2 = 0xe9620000; |
3620 | static const uint32_t ld_11_11 = 0xe96b0000; | |
3621 | static const uint32_t ld_12_2 = 0xe9820000; | |
3622 | static const uint32_t ld_12_11 = 0xe98b0000; | |
9055360d | 3623 | static const uint32_t ld_12_12 = 0xe98c0000; |
f3a0ed29 | 3624 | static const uint32_t lfd_0_1 = 0xc8010000; |
dd93cd0a | 3625 | static const uint32_t li_0_0 = 0x38000000; |
f3a0ed29 | 3626 | static const uint32_t li_12_0 = 0x39800000; |
bbec1a5d | 3627 | static const uint32_t lis_0 = 0x3c000000; |
549dba71 | 3628 | static const uint32_t lis_2 = 0x3c400000; |
c9269dff AM |
3629 | static const uint32_t lis_11 = 0x3d600000; |
3630 | static const uint32_t lis_12 = 0x3d800000; | |
b4f7960d | 3631 | static const uint32_t lvx_0_12_0 = 0x7c0c00ce; |
c9269dff AM |
3632 | static const uint32_t lwz_0_12 = 0x800c0000; |
3633 | static const uint32_t lwz_11_11 = 0x816b0000; | |
3634 | static const uint32_t lwz_11_30 = 0x817e0000; | |
3635 | static const uint32_t lwz_12_12 = 0x818c0000; | |
dd93cd0a | 3636 | static const uint32_t lwzu_0_12 = 0x840c0000; |
c9269dff | 3637 | static const uint32_t mflr_0 = 0x7c0802a6; |
dd93cd0a | 3638 | static const uint32_t mflr_11 = 0x7d6802a6; |
c9269dff AM |
3639 | static const uint32_t mflr_12 = 0x7d8802a6; |
3640 | static const uint32_t mtctr_0 = 0x7c0903a6; | |
3641 | static const uint32_t mtctr_11 = 0x7d6903a6; | |
ec661b9d | 3642 | static const uint32_t mtctr_12 = 0x7d8903a6; |
c9269dff | 3643 | static const uint32_t mtlr_0 = 0x7c0803a6; |
c9269dff | 3644 | static const uint32_t mtlr_12 = 0x7d8803a6; |
dd93cd0a | 3645 | static const uint32_t nop = 0x60000000; |
c9269dff | 3646 | static const uint32_t ori_0_0_0 = 0x60000000; |
b4f7960d | 3647 | static const uint32_t srdi_0_0_2 = 0x7800f082; |
f3a0ed29 AM |
3648 | static const uint32_t std_0_1 = 0xf8010000; |
3649 | static const uint32_t std_0_12 = 0xf80c0000; | |
dd93cd0a | 3650 | static const uint32_t std_2_1 = 0xf8410000; |
f3a0ed29 AM |
3651 | static const uint32_t stfd_0_1 = 0xd8010000; |
3652 | static const uint32_t stvx_0_12_0 = 0x7c0c01ce; | |
dd93cd0a | 3653 | static const uint32_t sub_11_11_12 = 0x7d6c5850; |
b4f7960d AM |
3654 | static const uint32_t sub_12_12_11 = 0x7d8b6050; |
3655 | static const uint32_t xor_2_12_12 = 0x7d826278; | |
3656 | static const uint32_t xor_11_12_12 = 0x7d8b6278; | |
42cacb20 DE |
3657 | |
3658 | // Write out the PLT. | |
3659 | ||
3660 | template<int size, bool big_endian> | |
3661 | void | |
3662 | Output_data_plt_powerpc<size, big_endian>::do_write(Output_file* of) | |
3663 | { | |
b3ccdeb5 | 3664 | if (size == 32 && this->name_[3] != 'I') |
cf43a2fe | 3665 | { |
ec661b9d | 3666 | const section_size_type offset = this->offset(); |
cf43a2fe AM |
3667 | const section_size_type oview_size |
3668 | = convert_to_section_size_type(this->data_size()); | |
3669 | unsigned char* const oview = of->get_output_view(offset, oview_size); | |
3670 | unsigned char* pov = oview; | |
3671 | unsigned char* endpov = oview + oview_size; | |
3672 | ||
e5d5f5ed | 3673 | // The address of the .glink branch table |
cf43a2fe AM |
3674 | const Output_data_glink<size, big_endian>* glink |
3675 | = this->targ_->glink_section(); | |
ec661b9d | 3676 | elfcpp::Elf_types<32>::Elf_Addr branch_tab = glink->address(); |
cf43a2fe AM |
3677 | |
3678 | while (pov < endpov) | |
3679 | { | |
3680 | elfcpp::Swap<32, big_endian>::writeval(pov, branch_tab); | |
3681 | pov += 4; | |
3682 | branch_tab += 4; | |
3683 | } | |
3684 | ||
3685 | of->write_output_view(offset, oview_size, oview); | |
3686 | } | |
3687 | } | |
3688 | ||
3689 | // Create the PLT section. | |
3690 | ||
3691 | template<int size, bool big_endian> | |
3692 | void | |
40b469d7 AM |
3693 | Target_powerpc<size, big_endian>::make_plt_section(Symbol_table* symtab, |
3694 | Layout* layout) | |
cf43a2fe AM |
3695 | { |
3696 | if (this->plt_ == NULL) | |
3697 | { | |
40b469d7 AM |
3698 | if (this->got_ == NULL) |
3699 | this->got_section(symtab, layout); | |
3700 | ||
cf43a2fe AM |
3701 | if (this->glink_ == NULL) |
3702 | make_glink_section(layout); | |
3703 | ||
3704 | // Ensure that .rela.dyn always appears before .rela.plt This is | |
3705 | // necessary due to how, on PowerPC and some other targets, .rela.dyn | |
b3ccdeb5 | 3706 | // needs to include .rela.plt in its range. |
cf43a2fe AM |
3707 | this->rela_dyn_section(layout); |
3708 | ||
e5d5f5ed AM |
3709 | Reloc_section* plt_rel = new Reloc_section(false); |
3710 | layout->add_output_section_data(".rela.plt", elfcpp::SHT_RELA, | |
3711 | elfcpp::SHF_ALLOC, plt_rel, | |
3712 | ORDER_DYNAMIC_PLT_RELOCS, false); | |
3713 | this->plt_ | |
3714 | = new Output_data_plt_powerpc<size, big_endian>(this, plt_rel, | |
e5d5f5ed | 3715 | "** PLT"); |
cf43a2fe AM |
3716 | layout->add_output_section_data(".plt", |
3717 | (size == 32 | |
3718 | ? elfcpp::SHT_PROGBITS | |
3719 | : elfcpp::SHT_NOBITS), | |
3720 | elfcpp::SHF_ALLOC | elfcpp::SHF_WRITE, | |
3721 | this->plt_, | |
3722 | (size == 32 | |
3723 | ? ORDER_SMALL_DATA | |
3724 | : ORDER_SMALL_BSS), | |
3725 | false); | |
3254d32c AM |
3726 | |
3727 | Output_section* rela_plt_os = plt_rel->output_section(); | |
3728 | rela_plt_os->set_info_section(this->plt_->output_section()); | |
cf43a2fe AM |
3729 | } |
3730 | } | |
3731 | ||
e5d5f5ed AM |
3732 | // Create the IPLT section. |
3733 | ||
3734 | template<int size, bool big_endian> | |
3735 | void | |
40b469d7 AM |
3736 | Target_powerpc<size, big_endian>::make_iplt_section(Symbol_table* symtab, |
3737 | Layout* layout) | |
e5d5f5ed AM |
3738 | { |
3739 | if (this->iplt_ == NULL) | |
3740 | { | |
40b469d7 | 3741 | this->make_plt_section(symtab, layout); |
e5d5f5ed AM |
3742 | |
3743 | Reloc_section* iplt_rel = new Reloc_section(false); | |
6528b6eb AM |
3744 | if (this->rela_dyn_->output_section()) |
3745 | this->rela_dyn_->output_section()->add_output_section_data(iplt_rel); | |
e5d5f5ed AM |
3746 | this->iplt_ |
3747 | = new Output_data_plt_powerpc<size, big_endian>(this, iplt_rel, | |
b4f7960d | 3748 | "** IPLT"); |
6528b6eb AM |
3749 | if (this->plt_->output_section()) |
3750 | this->plt_->output_section()->add_output_section_data(this->iplt_); | |
e5d5f5ed AM |
3751 | } |
3752 | } | |
3753 | ||
ec661b9d | 3754 | // A section for huge long branch addresses, similar to plt section. |
cf43a2fe AM |
3755 | |
3756 | template<int size, bool big_endian> | |
ec661b9d | 3757 | class Output_data_brlt_powerpc : public Output_section_data_build |
cf43a2fe AM |
3758 | { |
3759 | public: | |
ec661b9d AM |
3760 | typedef typename elfcpp::Elf_types<size>::Elf_Addr Address; |
3761 | typedef Output_data_reloc<elfcpp::SHT_RELA, true, | |
3762 | size, big_endian> Reloc_section; | |
c9269dff | 3763 | |
ec661b9d AM |
3764 | Output_data_brlt_powerpc(Target_powerpc<size, big_endian>* targ, |
3765 | Reloc_section* brlt_rel) | |
3766 | : Output_section_data_build(size == 32 ? 4 : 8), | |
3767 | rel_(brlt_rel), | |
3768 | targ_(targ) | |
3769 | { } | |
cf43a2fe | 3770 | |
06f30c9d CC |
3771 | void |
3772 | reset_brlt_sizes() | |
3773 | { | |
3774 | this->reset_data_size(); | |
3775 | this->rel_->reset_data_size(); | |
3776 | } | |
3777 | ||
3778 | void | |
3779 | finalize_brlt_sizes() | |
3780 | { | |
3781 | this->finalize_data_size(); | |
3782 | this->rel_->finalize_data_size(); | |
3783 | } | |
3784 | ||
ec661b9d | 3785 | // Add a reloc for an entry in the BRLT. |
cf43a2fe | 3786 | void |
ec661b9d AM |
3787 | add_reloc(Address to, unsigned int off) |
3788 | { this->rel_->add_relative(elfcpp::R_POWERPC_RELATIVE, this, off, to); } | |
e5d5f5ed | 3789 | |
ec661b9d | 3790 | // Update section and reloc section size. |
e5d5f5ed | 3791 | void |
ec661b9d AM |
3792 | set_current_size(unsigned int num_branches) |
3793 | { | |
3794 | this->reset_address_and_file_offset(); | |
3795 | this->set_current_data_size(num_branches * 16); | |
3796 | this->finalize_data_size(); | |
3797 | Output_section* os = this->output_section(); | |
3798 | os->set_section_offsets_need_adjustment(); | |
3799 | if (this->rel_ != NULL) | |
3800 | { | |
0e123f69 | 3801 | const unsigned int reloc_size = elfcpp::Elf_sizes<size>::rela_size; |
ec661b9d AM |
3802 | this->rel_->reset_address_and_file_offset(); |
3803 | this->rel_->set_current_data_size(num_branches * reloc_size); | |
3804 | this->rel_->finalize_data_size(); | |
3805 | Output_section* os = this->rel_->output_section(); | |
3806 | os->set_section_offsets_need_adjustment(); | |
3807 | } | |
3808 | } | |
cf43a2fe | 3809 | |
ec661b9d AM |
3810 | protected: |
3811 | void | |
3812 | do_adjust_output_section(Output_section* os) | |
3813 | { | |
3814 | os->set_entsize(0); | |
3815 | } | |
e5d5f5ed | 3816 | |
ec661b9d AM |
3817 | // Write to a map file. |
3818 | void | |
3819 | do_print_to_mapfile(Mapfile* mapfile) const | |
3820 | { mapfile->print_output_data(this, "** BRLT"); } | |
c9824451 | 3821 | |
ec661b9d AM |
3822 | private: |
3823 | // Write out the BRLT data. | |
3824 | void | |
3825 | do_write(Output_file*); | |
c9824451 | 3826 | |
ec661b9d AM |
3827 | // The reloc section. |
3828 | Reloc_section* rel_; | |
3829 | Target_powerpc<size, big_endian>* targ_; | |
3830 | }; | |
cf43a2fe | 3831 | |
ec661b9d AM |
3832 | // Make the branch lookup table section. |
3833 | ||
3834 | template<int size, bool big_endian> | |
3835 | void | |
3836 | Target_powerpc<size, big_endian>::make_brlt_section(Layout* layout) | |
3837 | { | |
3838 | if (size == 64 && this->brlt_section_ == NULL) | |
3839 | { | |
3840 | Reloc_section* brlt_rel = NULL; | |
3841 | bool is_pic = parameters->options().output_is_position_independent(); | |
3842 | if (is_pic) | |
3843 | { | |
6830ee24 AM |
3844 | // When PIC we can't fill in .branch_lt (like .plt it can be |
3845 | // a bss style section) but must initialise at runtime via | |
6528b6eb | 3846 | // dynamic relocations. |
ec661b9d AM |
3847 | this->rela_dyn_section(layout); |
3848 | brlt_rel = new Reloc_section(false); | |
6528b6eb AM |
3849 | if (this->rela_dyn_->output_section()) |
3850 | this->rela_dyn_->output_section() | |
3851 | ->add_output_section_data(brlt_rel); | |
ec661b9d AM |
3852 | } |
3853 | this->brlt_section_ | |
3854 | = new Output_data_brlt_powerpc<size, big_endian>(this, brlt_rel); | |
6528b6eb | 3855 | if (this->plt_ && is_pic && this->plt_->output_section()) |
ec661b9d AM |
3856 | this->plt_->output_section() |
3857 | ->add_output_section_data(this->brlt_section_); | |
3858 | else | |
6830ee24 | 3859 | layout->add_output_section_data(".branch_lt", |
ec661b9d AM |
3860 | (is_pic ? elfcpp::SHT_NOBITS |
3861 | : elfcpp::SHT_PROGBITS), | |
3862 | elfcpp::SHF_ALLOC | elfcpp::SHF_WRITE, | |
3863 | this->brlt_section_, | |
3864 | (is_pic ? ORDER_SMALL_BSS | |
3865 | : ORDER_SMALL_DATA), | |
3866 | false); | |
3867 | } | |
3868 | } | |
3869 | ||
6830ee24 | 3870 | // Write out .branch_lt when non-PIC. |
ec661b9d AM |
3871 | |
3872 | template<int size, bool big_endian> | |
3873 | void | |
3874 | Output_data_brlt_powerpc<size, big_endian>::do_write(Output_file* of) | |
3875 | { | |
3876 | if (size == 64 && !parameters->options().output_is_position_independent()) | |
3877 | { | |
3878 | const section_size_type offset = this->offset(); | |
3879 | const section_size_type oview_size | |
3880 | = convert_to_section_size_type(this->data_size()); | |
3881 | unsigned char* const oview = of->get_output_view(offset, oview_size); | |
3882 | ||
3883 | this->targ_->write_branch_lookup_table(oview); | |
3884 | of->write_output_view(offset, oview_size, oview); | |
3885 | } | |
3886 | } | |
3887 | ||
9e69ed50 AM |
3888 | static inline uint32_t |
3889 | l(uint32_t a) | |
3890 | { | |
3891 | return a & 0xffff; | |
3892 | } | |
3893 | ||
3894 | static inline uint32_t | |
3895 | hi(uint32_t a) | |
3896 | { | |
3897 | return l(a >> 16); | |
3898 | } | |
3899 | ||
3900 | static inline uint32_t | |
3901 | ha(uint32_t a) | |
3902 | { | |
3903 | return hi(a + 0x8000); | |
3904 | } | |
3905 | ||
9d5781f8 AM |
3906 | template<int size> |
3907 | struct Eh_cie | |
3908 | { | |
3909 | static const unsigned char eh_frame_cie[12]; | |
3910 | }; | |
3911 | ||
3912 | template<int size> | |
3913 | const unsigned char Eh_cie<size>::eh_frame_cie[] = | |
3914 | { | |
3915 | 1, // CIE version. | |
3916 | 'z', 'R', 0, // Augmentation string. | |
3917 | 4, // Code alignment. | |
3918 | 0x80 - size / 8 , // Data alignment. | |
3919 | 65, // RA reg. | |
3920 | 1, // Augmentation size. | |
3921 | (elfcpp::DW_EH_PE_pcrel | |
3922 | | elfcpp::DW_EH_PE_sdata4), // FDE encoding. | |
3923 | elfcpp::DW_CFA_def_cfa, 1, 0 // def_cfa: r1 offset 0. | |
3924 | }; | |
3925 | ||
b4f7960d AM |
3926 | // Describe __glink_PLTresolve use of LR, 64-bit version ABIv1. |
3927 | static const unsigned char glink_eh_frame_fde_64v1[] = | |
9d5781f8 AM |
3928 | { |
3929 | 0, 0, 0, 0, // Replaced with offset to .glink. | |
3930 | 0, 0, 0, 0, // Replaced with size of .glink. | |
3931 | 0, // Augmentation size. | |
3932 | elfcpp::DW_CFA_advance_loc + 1, | |
3933 | elfcpp::DW_CFA_register, 65, 12, | |
3934 | elfcpp::DW_CFA_advance_loc + 4, | |
3935 | elfcpp::DW_CFA_restore_extended, 65 | |
3936 | }; | |
3937 | ||
b4f7960d AM |
3938 | // Describe __glink_PLTresolve use of LR, 64-bit version ABIv2. |
3939 | static const unsigned char glink_eh_frame_fde_64v2[] = | |
3940 | { | |
3941 | 0, 0, 0, 0, // Replaced with offset to .glink. | |
3942 | 0, 0, 0, 0, // Replaced with size of .glink. | |
3943 | 0, // Augmentation size. | |
3944 | elfcpp::DW_CFA_advance_loc + 1, | |
3945 | elfcpp::DW_CFA_register, 65, 0, | |
3946 | elfcpp::DW_CFA_advance_loc + 4, | |
3947 | elfcpp::DW_CFA_restore_extended, 65 | |
3948 | }; | |
3949 | ||
9d5781f8 AM |
3950 | // Describe __glink_PLTresolve use of LR, 32-bit version. |
3951 | static const unsigned char glink_eh_frame_fde_32[] = | |
3952 | { | |
3953 | 0, 0, 0, 0, // Replaced with offset to .glink. | |
3954 | 0, 0, 0, 0, // Replaced with size of .glink. | |
3955 | 0, // Augmentation size. | |
3956 | elfcpp::DW_CFA_advance_loc + 2, | |
3957 | elfcpp::DW_CFA_register, 65, 0, | |
3958 | elfcpp::DW_CFA_advance_loc + 4, | |
3959 | elfcpp::DW_CFA_restore_extended, 65 | |
3960 | }; | |
3961 | ||
3962 | static const unsigned char default_fde[] = | |
3963 | { | |
3964 | 0, 0, 0, 0, // Replaced with offset to stubs. | |
3965 | 0, 0, 0, 0, // Replaced with size of stubs. | |
3966 | 0, // Augmentation size. | |
3967 | elfcpp::DW_CFA_nop, // Pad. | |
3968 | elfcpp::DW_CFA_nop, | |
3969 | elfcpp::DW_CFA_nop | |
3970 | }; | |
3971 | ||
9e69ed50 AM |
3972 | template<bool big_endian> |
3973 | static inline void | |
3974 | write_insn(unsigned char* p, uint32_t v) | |
3975 | { | |
3976 | elfcpp::Swap<32, big_endian>::writeval(p, v); | |
3977 | } | |
3978 | ||
ec661b9d AM |
3979 | // Stub_table holds information about plt and long branch stubs. |
3980 | // Stubs are built in an area following some input section determined | |
3981 | // by group_sections(). This input section is converted to a relaxed | |
3982 | // input section allowing it to be resized to accommodate the stubs | |
3983 | ||
3984 | template<int size, bool big_endian> | |
3985 | class Stub_table : public Output_relaxed_input_section | |
3986 | { | |
3987 | public: | |
7e57d19e AM |
3988 | struct Plt_stub_ent |
3989 | { | |
3990 | Plt_stub_ent(unsigned int off, unsigned int indx) | |
3991 | : off_(off), indx_(indx), r2save_(0) | |
3992 | { } | |
3993 | ||
3994 | unsigned int off_; | |
3995 | unsigned int indx_ : 31; | |
3996 | unsigned int r2save_ : 1; | |
3997 | }; | |
ec661b9d AM |
3998 | typedef typename elfcpp::Elf_types<size>::Elf_Addr Address; |
3999 | static const Address invalid_address = static_cast<Address>(0) - 1; | |
4000 | ||
a3e60ddb AM |
4001 | Stub_table(Target_powerpc<size, big_endian>* targ, |
4002 | Output_section* output_section, | |
590b87ff AM |
4003 | const Output_section::Input_section* owner, |
4004 | uint32_t id) | |
a3e60ddb AM |
4005 | : Output_relaxed_input_section(owner->relobj(), owner->shndx(), |
4006 | owner->relobj() | |
4007 | ->section_addralign(owner->shndx())), | |
ec661b9d | 4008 | targ_(targ), plt_call_stubs_(), long_branch_stubs_(), |
a3e60ddb AM |
4009 | orig_data_size_(owner->current_data_size()), |
4010 | plt_size_(0), last_plt_size_(0), | |
6395d38b | 4011 | branch_size_(0), last_branch_size_(0), min_size_threshold_(0), |
590b87ff | 4012 | eh_frame_added_(false), need_save_res_(false), uniq_(id) |
a3e60ddb AM |
4013 | { |
4014 | this->set_output_section(output_section); | |
ec661b9d | 4015 | |
a3e60ddb AM |
4016 | std::vector<Output_relaxed_input_section*> new_relaxed; |
4017 | new_relaxed.push_back(this); | |
4018 | output_section->convert_input_sections_to_relaxed_sections(new_relaxed); | |
4019 | } | |
ec661b9d AM |
4020 | |
4021 | // Add a plt call stub. | |
a3e60ddb AM |
4022 | bool |
4023 | add_plt_call_entry(Address, | |
4024 | const Sized_relobj_file<size, big_endian>*, | |
ec661b9d AM |
4025 | const Symbol*, |
4026 | unsigned int, | |
7e57d19e AM |
4027 | Address, |
4028 | bool); | |
ec661b9d | 4029 | |
a3e60ddb AM |
4030 | bool |
4031 | add_plt_call_entry(Address, | |
4032 | const Sized_relobj_file<size, big_endian>*, | |
ec661b9d AM |
4033 | unsigned int, |
4034 | unsigned int, | |
7e57d19e AM |
4035 | Address, |
4036 | bool); | |
ec661b9d AM |
4037 | |
4038 | // Find a given plt call stub. | |
7e57d19e | 4039 | const Plt_stub_ent* |
ec661b9d AM |
4040 | find_plt_call_entry(const Symbol*) const; |
4041 | ||
7e57d19e | 4042 | const Plt_stub_ent* |
ec661b9d AM |
4043 | find_plt_call_entry(const Sized_relobj_file<size, big_endian>*, |
4044 | unsigned int) const; | |
4045 | ||
7e57d19e | 4046 | const Plt_stub_ent* |
ec661b9d AM |
4047 | find_plt_call_entry(const Sized_relobj_file<size, big_endian>*, |
4048 | const Symbol*, | |
4049 | unsigned int, | |
4050 | Address) const; | |
4051 | ||
7e57d19e | 4052 | const Plt_stub_ent* |
ec661b9d AM |
4053 | find_plt_call_entry(const Sized_relobj_file<size, big_endian>*, |
4054 | unsigned int, | |
4055 | unsigned int, | |
4056 | Address) const; | |
4057 | ||
4058 | // Add a long branch stub. | |
a3e60ddb AM |
4059 | bool |
4060 | add_long_branch_entry(const Powerpc_relobj<size, big_endian>*, | |
d49044c7 | 4061 | unsigned int, Address, Address, bool); |
ec661b9d AM |
4062 | |
4063 | Address | |
9d5781f8 AM |
4064 | find_long_branch_entry(const Powerpc_relobj<size, big_endian>*, |
4065 | Address) const; | |
ec661b9d | 4066 | |
a3e60ddb AM |
4067 | bool |
4068 | can_reach_stub(Address from, unsigned int off, unsigned int r_type) | |
4069 | { | |
cbcb23fa | 4070 | Address max_branch_offset = max_branch_delta(r_type); |
a3e60ddb AM |
4071 | if (max_branch_offset == 0) |
4072 | return true; | |
4073 | gold_assert(from != invalid_address); | |
4074 | Address loc = off + this->stub_address(); | |
4075 | return loc - from + max_branch_offset < 2 * max_branch_offset; | |
4076 | } | |
4077 | ||
ec661b9d | 4078 | void |
a3e60ddb | 4079 | clear_stubs(bool all) |
cf43a2fe | 4080 | { |
9e69ed50 AM |
4081 | this->plt_call_stubs_.clear(); |
4082 | this->plt_size_ = 0; | |
ec661b9d AM |
4083 | this->long_branch_stubs_.clear(); |
4084 | this->branch_size_ = 0; | |
d49044c7 | 4085 | this->need_save_res_ = false; |
a3e60ddb AM |
4086 | if (all) |
4087 | { | |
4088 | this->last_plt_size_ = 0; | |
4089 | this->last_branch_size_ = 0; | |
4090 | } | |
cf43a2fe AM |
4091 | } |
4092 | ||
ec661b9d AM |
4093 | Address |
4094 | set_address_and_size(const Output_section* os, Address off) | |
cf43a2fe | 4095 | { |
ec661b9d AM |
4096 | Address start_off = off; |
4097 | off += this->orig_data_size_; | |
4098 | Address my_size = this->plt_size_ + this->branch_size_; | |
d49044c7 AM |
4099 | if (this->need_save_res_) |
4100 | my_size += this->targ_->savres_section()->data_size(); | |
ec661b9d AM |
4101 | if (my_size != 0) |
4102 | off = align_address(off, this->stub_align()); | |
4103 | // Include original section size and alignment padding in size | |
4104 | my_size += off - start_off; | |
6395d38b HS |
4105 | // Ensure new size is always larger than min size |
4106 | // threshold. Alignment requirement is included in "my_size", so | |
4107 | // increase "my_size" does not invalidate alignment. | |
4108 | if (my_size < this->min_size_threshold_) | |
4109 | my_size = this->min_size_threshold_; | |
ec661b9d AM |
4110 | this->reset_address_and_file_offset(); |
4111 | this->set_current_data_size(my_size); | |
4112 | this->set_address_and_file_offset(os->address() + start_off, | |
4113 | os->offset() + start_off); | |
4114 | return my_size; | |
cf43a2fe AM |
4115 | } |
4116 | ||
ec661b9d | 4117 | Address |
9d5781f8 | 4118 | stub_address() const |
ec661b9d AM |
4119 | { |
4120 | return align_address(this->address() + this->orig_data_size_, | |
4121 | this->stub_align()); | |
4122 | } | |
4123 | ||
4124 | Address | |
9d5781f8 | 4125 | stub_offset() const |
ec661b9d AM |
4126 | { |
4127 | return align_address(this->offset() + this->orig_data_size_, | |
4128 | this->stub_align()); | |
4129 | } | |
4130 | ||
4131 | section_size_type | |
4132 | plt_size() const | |
4133 | { return this->plt_size_; } | |
4134 | ||
590b87ff AM |
4135 | void |
4136 | set_min_size_threshold(Address min_size) | |
6395d38b HS |
4137 | { this->min_size_threshold_ = min_size; } |
4138 | ||
590b87ff AM |
4139 | void |
4140 | define_stub_syms(Symbol_table*); | |
4141 | ||
ec661b9d AM |
4142 | bool |
4143 | size_update() | |
4144 | { | |
4145 | Output_section* os = this->output_section(); | |
4146 | if (os->addralign() < this->stub_align()) | |
4147 | { | |
4148 | os->set_addralign(this->stub_align()); | |
4149 | // FIXME: get rid of the insane checkpointing. | |
4150 | // We can't increase alignment of the input section to which | |
4151 | // stubs are attached; The input section may be .init which | |
4152 | // is pasted together with other .init sections to form a | |
4153 | // function. Aligning might insert zero padding resulting in | |
4154 | // sigill. However we do need to increase alignment of the | |
4155 | // output section so that the align_address() on offset in | |
4156 | // set_address_and_size() adds the same padding as the | |
4157 | // align_address() on address in stub_address(). | |
4158 | // What's more, we need this alignment for the layout done in | |
4159 | // relaxation_loop_body() so that the output section starts at | |
4160 | // a suitably aligned address. | |
4161 | os->checkpoint_set_addralign(this->stub_align()); | |
4162 | } | |
9e69ed50 AM |
4163 | if (this->last_plt_size_ != this->plt_size_ |
4164 | || this->last_branch_size_ != this->branch_size_) | |
ec661b9d | 4165 | { |
9e69ed50 AM |
4166 | this->last_plt_size_ = this->plt_size_; |
4167 | this->last_branch_size_ = this->branch_size_; | |
ec661b9d AM |
4168 | return true; |
4169 | } | |
4170 | return false; | |
4171 | } | |
4172 | ||
9d5781f8 AM |
4173 | // Add .eh_frame info for this stub section. Unlike other linker |
4174 | // generated .eh_frame this is added late in the link, because we | |
4175 | // only want the .eh_frame info if this particular stub section is | |
4176 | // non-empty. | |
4177 | void | |
4178 | add_eh_frame(Layout* layout) | |
4179 | { | |
4180 | if (!this->eh_frame_added_) | |
4181 | { | |
4182 | if (!parameters->options().ld_generated_unwind_info()) | |
4183 | return; | |
4184 | ||
4185 | // Since we add stub .eh_frame info late, it must be placed | |
4186 | // after all other linker generated .eh_frame info so that | |
4187 | // merge mapping need not be updated for input sections. | |
4188 | // There is no provision to use a different CIE to that used | |
4189 | // by .glink. | |
4190 | if (!this->targ_->has_glink()) | |
4191 | return; | |
4192 | ||
4193 | layout->add_eh_frame_for_plt(this, | |
4194 | Eh_cie<size>::eh_frame_cie, | |
4195 | sizeof (Eh_cie<size>::eh_frame_cie), | |
4196 | default_fde, | |
4197 | sizeof (default_fde)); | |
4198 | this->eh_frame_added_ = true; | |
4199 | } | |
4200 | } | |
4201 | ||
ec661b9d AM |
4202 | Target_powerpc<size, big_endian>* |
4203 | targ() const | |
4204 | { return targ_; } | |
6ce78956 | 4205 | |
cf43a2fe | 4206 | private: |
bdab445c AM |
4207 | class Plt_stub_key; |
4208 | class Plt_stub_key_hash; | |
bdab445c AM |
4209 | typedef Unordered_map<Plt_stub_key, Plt_stub_ent, |
4210 | Plt_stub_key_hash> Plt_stub_entries; | |
590b87ff AM |
4211 | class Branch_stub_ent; |
4212 | class Branch_stub_ent_hash; | |
4213 | typedef Unordered_map<Branch_stub_ent, unsigned int, | |
4214 | Branch_stub_ent_hash> Branch_stub_entries; | |
9e69ed50 AM |
4215 | |
4216 | // Alignment of stub section. | |
ec661b9d | 4217 | unsigned int |
9e69ed50 AM |
4218 | stub_align() const |
4219 | { | |
4220 | if (size == 32) | |
4221 | return 16; | |
4222 | unsigned int min_align = 32; | |
4223 | unsigned int user_align = 1 << parameters->options().plt_align(); | |
4224 | return std::max(user_align, min_align); | |
4225 | } | |
cf43a2fe | 4226 | |
91c2b899 AM |
4227 | // Return the plt offset for the given call stub. |
4228 | Address | |
4229 | plt_off(typename Plt_stub_entries::const_iterator p, bool* is_iplt) const | |
4230 | { | |
4231 | const Symbol* gsym = p->first.sym_; | |
4232 | if (gsym != NULL) | |
4233 | { | |
4234 | *is_iplt = (gsym->type() == elfcpp::STT_GNU_IFUNC | |
4235 | && gsym->can_use_relative_reloc(false)); | |
4236 | return gsym->plt_offset(); | |
4237 | } | |
4238 | else | |
4239 | { | |
4240 | *is_iplt = true; | |
4241 | const Sized_relobj_file<size, big_endian>* relobj = p->first.object_; | |
4242 | unsigned int local_sym_index = p->first.locsym_; | |
4243 | return relobj->local_plt_offset(local_sym_index); | |
4244 | } | |
4245 | } | |
4246 | ||
9e69ed50 | 4247 | // Size of a given plt call stub. |
ec661b9d | 4248 | unsigned int |
9e69ed50 AM |
4249 | plt_call_size(typename Plt_stub_entries::const_iterator p) const |
4250 | { | |
4251 | if (size == 32) | |
4252 | return 16; | |
4253 | ||
91c2b899 AM |
4254 | bool is_iplt; |
4255 | Address plt_addr = this->plt_off(p, &is_iplt); | |
4256 | if (is_iplt) | |
4257 | plt_addr += this->targ_->iplt_section()->address(); | |
9e69ed50 | 4258 | else |
91c2b899 AM |
4259 | plt_addr += this->targ_->plt_section()->address(); |
4260 | Address got_addr = this->targ_->got_section()->output_section()->address(); | |
9e69ed50 AM |
4261 | const Powerpc_relobj<size, big_endian>* ppcobj = static_cast |
4262 | <const Powerpc_relobj<size, big_endian>*>(p->first.object_); | |
91c2b899 AM |
4263 | got_addr += ppcobj->toc_base_offset(); |
4264 | Address off = plt_addr - got_addr; | |
b4f7960d AM |
4265 | unsigned int bytes = 4 * 4 + 4 * (ha(off) != 0); |
4266 | if (this->targ_->abiversion() < 2) | |
4267 | { | |
4268 | bool static_chain = parameters->options().plt_static_chain(); | |
4269 | bool thread_safe = this->targ_->plt_thread_safe(); | |
4270 | bytes += (4 | |
4271 | + 4 * static_chain | |
4272 | + 8 * thread_safe | |
4273 | + 4 * (ha(off + 8 + 8 * static_chain) != ha(off))); | |
4274 | } | |
9e69ed50 AM |
4275 | unsigned int align = 1 << parameters->options().plt_align(); |
4276 | if (align > 1) | |
4277 | bytes = (bytes + align - 1) & -align; | |
4278 | return bytes; | |
4279 | } | |
ec661b9d AM |
4280 | |
4281 | // Return long branch stub size. | |
4282 | unsigned int | |
590b87ff | 4283 | branch_stub_size(typename Branch_stub_entries::const_iterator p) |
ec661b9d | 4284 | { |
590b87ff AM |
4285 | Address loc = this->stub_address() + this->last_plt_size_ + p->second; |
4286 | if (p->first.dest_ - loc + (1 << 25) < 2 << 25) | |
ec661b9d AM |
4287 | return 4; |
4288 | if (size == 64 || !parameters->options().output_is_position_independent()) | |
4289 | return 16; | |
4290 | return 32; | |
4291 | } | |
4292 | ||
4293 | // Write out stubs. | |
cf43a2fe AM |
4294 | void |
4295 | do_write(Output_file*); | |
4296 | ||
ec661b9d | 4297 | // Plt call stub keys. |
bdab445c | 4298 | class Plt_stub_key |
cf43a2fe | 4299 | { |
d1a8cabd | 4300 | public: |
bdab445c | 4301 | Plt_stub_key(const Symbol* sym) |
c9824451 AM |
4302 | : sym_(sym), object_(0), addend_(0), locsym_(0) |
4303 | { } | |
4304 | ||
bdab445c | 4305 | Plt_stub_key(const Sized_relobj_file<size, big_endian>* object, |
ec661b9d | 4306 | unsigned int locsym_index) |
c9824451 AM |
4307 | : sym_(NULL), object_(object), addend_(0), locsym_(locsym_index) |
4308 | { } | |
4309 | ||
bdab445c | 4310 | Plt_stub_key(const Sized_relobj_file<size, big_endian>* object, |
ec661b9d AM |
4311 | const Symbol* sym, |
4312 | unsigned int r_type, | |
4313 | Address addend) | |
e5d5f5ed | 4314 | : sym_(sym), object_(0), addend_(0), locsym_(0) |
cf43a2fe AM |
4315 | { |
4316 | if (size != 32) | |
ec661b9d | 4317 | this->addend_ = addend; |
d1a8cabd | 4318 | else if (parameters->options().output_is_position_independent() |
ec661b9d | 4319 | && r_type == elfcpp::R_PPC_PLTREL24) |
cf43a2fe | 4320 | { |
ec661b9d | 4321 | this->addend_ = addend; |
e5d5f5ed | 4322 | if (this->addend_ >= 32768) |
d1a8cabd | 4323 | this->object_ = object; |
cf43a2fe AM |
4324 | } |
4325 | } | |
4326 | ||
bdab445c | 4327 | Plt_stub_key(const Sized_relobj_file<size, big_endian>* object, |
ec661b9d AM |
4328 | unsigned int locsym_index, |
4329 | unsigned int r_type, | |
4330 | Address addend) | |
e5d5f5ed AM |
4331 | : sym_(NULL), object_(object), addend_(0), locsym_(locsym_index) |
4332 | { | |
4333 | if (size != 32) | |
ec661b9d | 4334 | this->addend_ = addend; |
e5d5f5ed | 4335 | else if (parameters->options().output_is_position_independent() |
ec661b9d AM |
4336 | && r_type == elfcpp::R_PPC_PLTREL24) |
4337 | this->addend_ = addend; | |
e5d5f5ed AM |
4338 | } |
4339 | ||
bdab445c | 4340 | bool operator==(const Plt_stub_key& that) const |
cf43a2fe AM |
4341 | { |
4342 | return (this->sym_ == that.sym_ | |
4343 | && this->object_ == that.object_ | |
e5d5f5ed AM |
4344 | && this->addend_ == that.addend_ |
4345 | && this->locsym_ == that.locsym_); | |
cf43a2fe | 4346 | } |
c9269dff AM |
4347 | |
4348 | const Symbol* sym_; | |
e5d5f5ed AM |
4349 | const Sized_relobj_file<size, big_endian>* object_; |
4350 | typename elfcpp::Elf_types<size>::Elf_Addr addend_; | |
4351 | unsigned int locsym_; | |
cf43a2fe AM |
4352 | }; |
4353 | ||
bdab445c | 4354 | class Plt_stub_key_hash |
cf43a2fe | 4355 | { |
d1a8cabd | 4356 | public: |
bdab445c | 4357 | size_t operator()(const Plt_stub_key& ent) const |
cf43a2fe AM |
4358 | { |
4359 | return (reinterpret_cast<uintptr_t>(ent.sym_) | |
4360 | ^ reinterpret_cast<uintptr_t>(ent.object_) | |
e5d5f5ed AM |
4361 | ^ ent.addend_ |
4362 | ^ ent.locsym_); | |
cf43a2fe | 4363 | } |
ec661b9d AM |
4364 | }; |
4365 | ||
4366 | // Long branch stub keys. | |
4367 | class Branch_stub_ent | |
4368 | { | |
4369 | public: | |
d49044c7 AM |
4370 | Branch_stub_ent(const Powerpc_relobj<size, big_endian>* obj, |
4371 | Address to, bool save_res) | |
4372 | : dest_(to), toc_base_off_(0), save_res_(save_res) | |
ec661b9d AM |
4373 | { |
4374 | if (size == 64) | |
4375 | toc_base_off_ = obj->toc_base_offset(); | |
4376 | } | |
4377 | ||
4378 | bool operator==(const Branch_stub_ent& that) const | |
4379 | { | |
4380 | return (this->dest_ == that.dest_ | |
4381 | && (size == 32 | |
4382 | || this->toc_base_off_ == that.toc_base_off_)); | |
4383 | } | |
cf43a2fe | 4384 | |
ec661b9d AM |
4385 | Address dest_; |
4386 | unsigned int toc_base_off_; | |
d49044c7 | 4387 | bool save_res_; |
ec661b9d | 4388 | }; |
cf43a2fe | 4389 | |
ec661b9d AM |
4390 | class Branch_stub_ent_hash |
4391 | { | |
4392 | public: | |
4393 | size_t operator()(const Branch_stub_ent& ent) const | |
4394 | { return ent.dest_ ^ ent.toc_base_off_; } | |
4395 | }; | |
cf43a2fe | 4396 | |
ec661b9d | 4397 | // In a sane world this would be a global. |
cf43a2fe | 4398 | Target_powerpc<size, big_endian>* targ_; |
ec661b9d | 4399 | // Map sym/object/addend to stub offset. |
ec661b9d AM |
4400 | Plt_stub_entries plt_call_stubs_; |
4401 | // Map destination address to stub offset. | |
ec661b9d AM |
4402 | Branch_stub_entries long_branch_stubs_; |
4403 | // size of input section | |
4404 | section_size_type orig_data_size_; | |
4405 | // size of stubs | |
9e69ed50 | 4406 | section_size_type plt_size_, last_plt_size_, branch_size_, last_branch_size_; |
6395d38b HS |
4407 | // Some rare cases cause (PR/20529) fluctuation in stub table |
4408 | // size, which leads to an endless relax loop. This is to be fixed | |
4409 | // by, after the first few iterations, allowing only increase of | |
4410 | // stub table size. This variable sets the minimal possible size of | |
4411 | // a stub table, it is zero for the first few iterations, then | |
4412 | // increases monotonically. | |
4413 | Address min_size_threshold_; | |
9d5781f8 AM |
4414 | // Whether .eh_frame info has been created for this stub section. |
4415 | bool eh_frame_added_; | |
d49044c7 AM |
4416 | // Set if this stub group needs a copy of out-of-line register |
4417 | // save/restore functions. | |
4418 | bool need_save_res_; | |
590b87ff AM |
4419 | // Per stub table unique identifier. |
4420 | uint32_t uniq_; | |
cf43a2fe AM |
4421 | }; |
4422 | ||
ec661b9d | 4423 | // Add a plt call stub, if we do not already have one for this |
d1a8cabd | 4424 | // sym/object/addend combo. |
cf43a2fe AM |
4425 | |
4426 | template<int size, bool big_endian> | |
a3e60ddb | 4427 | bool |
ec661b9d | 4428 | Stub_table<size, big_endian>::add_plt_call_entry( |
a3e60ddb | 4429 | Address from, |
c9824451 | 4430 | const Sized_relobj_file<size, big_endian>* object, |
d83ce4e3 | 4431 | const Symbol* gsym, |
ec661b9d | 4432 | unsigned int r_type, |
7e57d19e AM |
4433 | Address addend, |
4434 | bool tocsave) | |
cf43a2fe | 4435 | { |
bdab445c AM |
4436 | Plt_stub_key key(object, gsym, r_type, addend); |
4437 | Plt_stub_ent ent(this->plt_size_, this->plt_call_stubs_.size()); | |
9e69ed50 | 4438 | std::pair<typename Plt_stub_entries::iterator, bool> p |
bdab445c | 4439 | = this->plt_call_stubs_.insert(std::make_pair(key, ent)); |
9e69ed50 | 4440 | if (p.second) |
bdab445c | 4441 | this->plt_size_ = ent.off_ + this->plt_call_size(p.first); |
7e57d19e AM |
4442 | if (size == 64 && !tocsave) |
4443 | p.first->second.r2save_ = 1; | |
bdab445c | 4444 | return this->can_reach_stub(from, ent.off_, r_type); |
cf43a2fe AM |
4445 | } |
4446 | ||
e5d5f5ed | 4447 | template<int size, bool big_endian> |
a3e60ddb | 4448 | bool |
ec661b9d | 4449 | Stub_table<size, big_endian>::add_plt_call_entry( |
a3e60ddb | 4450 | Address from, |
c9824451 | 4451 | const Sized_relobj_file<size, big_endian>* object, |
e5d5f5ed | 4452 | unsigned int locsym_index, |
ec661b9d | 4453 | unsigned int r_type, |
7e57d19e AM |
4454 | Address addend, |
4455 | bool tocsave) | |
e5d5f5ed | 4456 | { |
bdab445c AM |
4457 | Plt_stub_key key(object, locsym_index, r_type, addend); |
4458 | Plt_stub_ent ent(this->plt_size_, this->plt_call_stubs_.size()); | |
9e69ed50 | 4459 | std::pair<typename Plt_stub_entries::iterator, bool> p |
bdab445c | 4460 | = this->plt_call_stubs_.insert(std::make_pair(key, ent)); |
9e69ed50 | 4461 | if (p.second) |
bdab445c | 4462 | this->plt_size_ = ent.off_ + this->plt_call_size(p.first); |
7e57d19e AM |
4463 | if (size == 64 && !tocsave) |
4464 | p.first->second.r2save_ = 1; | |
bdab445c | 4465 | return this->can_reach_stub(from, ent.off_, r_type); |
e5d5f5ed AM |
4466 | } |
4467 | ||
ec661b9d AM |
4468 | // Find a plt call stub. |
4469 | ||
cf43a2fe | 4470 | template<int size, bool big_endian> |
7e57d19e | 4471 | const typename Stub_table<size, big_endian>::Plt_stub_ent* |
ec661b9d | 4472 | Stub_table<size, big_endian>::find_plt_call_entry( |
c9824451 | 4473 | const Sized_relobj_file<size, big_endian>* object, |
d83ce4e3 | 4474 | const Symbol* gsym, |
ec661b9d AM |
4475 | unsigned int r_type, |
4476 | Address addend) const | |
c9824451 | 4477 | { |
bdab445c AM |
4478 | Plt_stub_key key(object, gsym, r_type, addend); |
4479 | typename Plt_stub_entries::const_iterator p = this->plt_call_stubs_.find(key); | |
4480 | if (p == this->plt_call_stubs_.end()) | |
7e57d19e AM |
4481 | return NULL; |
4482 | return &p->second; | |
c9824451 AM |
4483 | } |
4484 | ||
4485 | template<int size, bool big_endian> | |
7e57d19e | 4486 | const typename Stub_table<size, big_endian>::Plt_stub_ent* |
ec661b9d | 4487 | Stub_table<size, big_endian>::find_plt_call_entry(const Symbol* gsym) const |
cf43a2fe | 4488 | { |
bdab445c AM |
4489 | Plt_stub_key key(gsym); |
4490 | typename Plt_stub_entries::const_iterator p = this->plt_call_stubs_.find(key); | |
7e57d19e AM |
4491 | if (p == this->plt_call_stubs_.end()) |
4492 | return NULL; | |
4493 | return &p->second; | |
cf43a2fe AM |
4494 | } |
4495 | ||
e5d5f5ed | 4496 | template<int size, bool big_endian> |
7e57d19e | 4497 | const typename Stub_table<size, big_endian>::Plt_stub_ent* |
ec661b9d | 4498 | Stub_table<size, big_endian>::find_plt_call_entry( |
c9824451 | 4499 | const Sized_relobj_file<size, big_endian>* object, |
e5d5f5ed | 4500 | unsigned int locsym_index, |
ec661b9d AM |
4501 | unsigned int r_type, |
4502 | Address addend) const | |
e5d5f5ed | 4503 | { |
bdab445c AM |
4504 | Plt_stub_key key(object, locsym_index, r_type, addend); |
4505 | typename Plt_stub_entries::const_iterator p = this->plt_call_stubs_.find(key); | |
4506 | if (p == this->plt_call_stubs_.end()) | |
7e57d19e AM |
4507 | return NULL; |
4508 | return &p->second; | |
c9824451 AM |
4509 | } |
4510 | ||
4511 | template<int size, bool big_endian> | |
7e57d19e | 4512 | const typename Stub_table<size, big_endian>::Plt_stub_ent* |
ec661b9d | 4513 | Stub_table<size, big_endian>::find_plt_call_entry( |
c9824451 AM |
4514 | const Sized_relobj_file<size, big_endian>* object, |
4515 | unsigned int locsym_index) const | |
4516 | { | |
bdab445c AM |
4517 | Plt_stub_key key(object, locsym_index); |
4518 | typename Plt_stub_entries::const_iterator p = this->plt_call_stubs_.find(key); | |
7e57d19e AM |
4519 | if (p == this->plt_call_stubs_.end()) |
4520 | return NULL; | |
4521 | return &p->second; | |
ec661b9d AM |
4522 | } |
4523 | ||
4524 | // Add a long branch stub if we don't already have one to given | |
4525 | // destination. | |
4526 | ||
4527 | template<int size, bool big_endian> | |
a3e60ddb | 4528 | bool |
ec661b9d AM |
4529 | Stub_table<size, big_endian>::add_long_branch_entry( |
4530 | const Powerpc_relobj<size, big_endian>* object, | |
a3e60ddb AM |
4531 | unsigned int r_type, |
4532 | Address from, | |
d49044c7 AM |
4533 | Address to, |
4534 | bool save_res) | |
ec661b9d | 4535 | { |
d49044c7 | 4536 | Branch_stub_ent ent(object, to, save_res); |
ec661b9d | 4537 | Address off = this->branch_size_; |
590b87ff AM |
4538 | std::pair<typename Branch_stub_entries::iterator, bool> p |
4539 | = this->long_branch_stubs_.insert(std::make_pair(ent, off)); | |
4540 | if (p.second) | |
ec661b9d | 4541 | { |
d49044c7 AM |
4542 | if (save_res) |
4543 | this->need_save_res_ = true; | |
4544 | else | |
4545 | { | |
590b87ff | 4546 | unsigned int stub_size = this->branch_stub_size(p.first); |
d49044c7 AM |
4547 | this->branch_size_ = off + stub_size; |
4548 | if (size == 64 && stub_size != 4) | |
4549 | this->targ_->add_branch_lookup_table(to); | |
4550 | } | |
ec661b9d | 4551 | } |
a3e60ddb | 4552 | return this->can_reach_stub(from, off, r_type); |
ec661b9d AM |
4553 | } |
4554 | ||
d49044c7 | 4555 | // Find long branch stub offset. |
ec661b9d AM |
4556 | |
4557 | template<int size, bool big_endian> | |
ec5b8187 | 4558 | typename Stub_table<size, big_endian>::Address |
ec661b9d AM |
4559 | Stub_table<size, big_endian>::find_long_branch_entry( |
4560 | const Powerpc_relobj<size, big_endian>* object, | |
9d5781f8 | 4561 | Address to) const |
ec661b9d | 4562 | { |
d49044c7 | 4563 | Branch_stub_ent ent(object, to, false); |
ec661b9d AM |
4564 | typename Branch_stub_entries::const_iterator p |
4565 | = this->long_branch_stubs_.find(ent); | |
d49044c7 AM |
4566 | if (p == this->long_branch_stubs_.end()) |
4567 | return invalid_address; | |
4568 | if (p->first.save_res_) | |
4569 | return to - this->targ_->savres_section()->address() + this->branch_size_; | |
4570 | return p->second; | |
e5d5f5ed AM |
4571 | } |
4572 | ||
ec661b9d AM |
4573 | // A class to handle .glink. |
4574 | ||
4575 | template<int size, bool big_endian> | |
4576 | class Output_data_glink : public Output_section_data | |
4577 | { | |
4578 | public: | |
9055360d AM |
4579 | typedef typename elfcpp::Elf_types<size>::Elf_Addr Address; |
4580 | static const Address invalid_address = static_cast<Address>(0) - 1; | |
ec661b9d AM |
4581 | static const int pltresolve_size = 16*4; |
4582 | ||
4583 | Output_data_glink(Target_powerpc<size, big_endian>* targ) | |
9055360d AM |
4584 | : Output_section_data(16), targ_(targ), global_entry_stubs_(), |
4585 | end_branch_table_(), ge_size_(0) | |
ec661b9d AM |
4586 | { } |
4587 | ||
9d5781f8 | 4588 | void |
9055360d | 4589 | add_eh_frame(Layout* layout); |
9d5781f8 | 4590 | |
9055360d AM |
4591 | void |
4592 | add_global_entry(const Symbol*); | |
4593 | ||
4594 | Address | |
4595 | find_global_entry(const Symbol*) const; | |
4596 | ||
4597 | Address | |
4598 | global_entry_address() const | |
4599 | { | |
4600 | gold_assert(this->is_data_size_valid()); | |
4601 | unsigned int global_entry_off = (this->end_branch_table_ + 15) & -16; | |
4602 | return this->address() + global_entry_off; | |
9d5781f8 AM |
4603 | } |
4604 | ||
ec661b9d AM |
4605 | protected: |
4606 | // Write to a map file. | |
4607 | void | |
4608 | do_print_to_mapfile(Mapfile* mapfile) const | |
4609 | { mapfile->print_output_data(this, _("** glink")); } | |
4610 | ||
4611 | private: | |
4612 | void | |
4613 | set_final_data_size(); | |
4614 | ||
4615 | // Write out .glink | |
4616 | void | |
4617 | do_write(Output_file*); | |
4618 | ||
4619 | // Allows access to .got and .plt for do_write. | |
4620 | Target_powerpc<size, big_endian>* targ_; | |
9055360d AM |
4621 | |
4622 | // Map sym to stub offset. | |
4623 | typedef Unordered_map<const Symbol*, unsigned int> Global_entry_stub_entries; | |
4624 | Global_entry_stub_entries global_entry_stubs_; | |
4625 | ||
4626 | unsigned int end_branch_table_, ge_size_; | |
ec661b9d AM |
4627 | }; |
4628 | ||
9055360d AM |
4629 | template<int size, bool big_endian> |
4630 | void | |
4631 | Output_data_glink<size, big_endian>::add_eh_frame(Layout* layout) | |
4632 | { | |
4633 | if (!parameters->options().ld_generated_unwind_info()) | |
4634 | return; | |
4635 | ||
4636 | if (size == 64) | |
4637 | { | |
4638 | if (this->targ_->abiversion() < 2) | |
4639 | layout->add_eh_frame_for_plt(this, | |
4640 | Eh_cie<64>::eh_frame_cie, | |
4641 | sizeof (Eh_cie<64>::eh_frame_cie), | |
4642 | glink_eh_frame_fde_64v1, | |
4643 | sizeof (glink_eh_frame_fde_64v1)); | |
4644 | else | |
4645 | layout->add_eh_frame_for_plt(this, | |
4646 | Eh_cie<64>::eh_frame_cie, | |
4647 | sizeof (Eh_cie<64>::eh_frame_cie), | |
4648 | glink_eh_frame_fde_64v2, | |
4649 | sizeof (glink_eh_frame_fde_64v2)); | |
4650 | } | |
4651 | else | |
4652 | { | |
4653 | // 32-bit .glink can use the default since the CIE return | |
4654 | // address reg, LR, is valid. | |
4655 | layout->add_eh_frame_for_plt(this, | |
4656 | Eh_cie<32>::eh_frame_cie, | |
4657 | sizeof (Eh_cie<32>::eh_frame_cie), | |
4658 | default_fde, | |
4659 | sizeof (default_fde)); | |
4660 | // Except where LR is used in a PIC __glink_PLTresolve. | |
4661 | if (parameters->options().output_is_position_independent()) | |
4662 | layout->add_eh_frame_for_plt(this, | |
4663 | Eh_cie<32>::eh_frame_cie, | |
4664 | sizeof (Eh_cie<32>::eh_frame_cie), | |
4665 | glink_eh_frame_fde_32, | |
4666 | sizeof (glink_eh_frame_fde_32)); | |
4667 | } | |
4668 | } | |
4669 | ||
4670 | template<int size, bool big_endian> | |
4671 | void | |
4672 | Output_data_glink<size, big_endian>::add_global_entry(const Symbol* gsym) | |
4673 | { | |
4674 | std::pair<typename Global_entry_stub_entries::iterator, bool> p | |
4675 | = this->global_entry_stubs_.insert(std::make_pair(gsym, this->ge_size_)); | |
4676 | if (p.second) | |
4677 | this->ge_size_ += 16; | |
4678 | } | |
4679 | ||
4680 | template<int size, bool big_endian> | |
4681 | typename Output_data_glink<size, big_endian>::Address | |
4682 | Output_data_glink<size, big_endian>::find_global_entry(const Symbol* gsym) const | |
4683 | { | |
4684 | typename Global_entry_stub_entries::const_iterator p | |
4685 | = this->global_entry_stubs_.find(gsym); | |
4686 | return p == this->global_entry_stubs_.end() ? invalid_address : p->second; | |
4687 | } | |
4688 | ||
cf43a2fe AM |
4689 | template<int size, bool big_endian> |
4690 | void | |
4691 | Output_data_glink<size, big_endian>::set_final_data_size() | |
4692 | { | |
ec661b9d AM |
4693 | unsigned int count = this->targ_->plt_entry_count(); |
4694 | section_size_type total = 0; | |
cf43a2fe AM |
4695 | |
4696 | if (count != 0) | |
4697 | { | |
4698 | if (size == 32) | |
4699 | { | |
cf43a2fe AM |
4700 | // space for branch table |
4701 | total += 4 * (count - 1); | |
4702 | ||
4703 | total += -total & 15; | |
4704 | total += this->pltresolve_size; | |
4705 | } | |
4706 | else | |
4707 | { | |
cf43a2fe AM |
4708 | total += this->pltresolve_size; |
4709 | ||
4710 | // space for branch table | |
b4f7960d AM |
4711 | total += 4 * count; |
4712 | if (this->targ_->abiversion() < 2) | |
4713 | { | |
4714 | total += 4 * count; | |
4715 | if (count > 0x8000) | |
4716 | total += 4 * (count - 0x8000); | |
4717 | } | |
cf43a2fe AM |
4718 | } |
4719 | } | |
9055360d AM |
4720 | this->end_branch_table_ = total; |
4721 | total = (total + 15) & -16; | |
4722 | total += this->ge_size_; | |
cf43a2fe AM |
4723 | |
4724 | this->set_data_size(total); | |
4725 | } | |
4726 | ||
590b87ff AM |
4727 | // Define symbols on stubs, identifying the stub. |
4728 | ||
4729 | template<int size, bool big_endian> | |
4730 | void | |
4731 | Stub_table<size, big_endian>::define_stub_syms(Symbol_table* symtab) | |
4732 | { | |
4733 | if (!this->plt_call_stubs_.empty()) | |
4734 | { | |
4735 | // The key for the plt call stub hash table includes addresses, | |
4736 | // therefore traversal order depends on those addresses, which | |
4737 | // can change between runs if gold is a PIE. Unfortunately the | |
4738 | // output .symtab ordering depends on the order in which symbols | |
4739 | // are added to the linker symtab. We want reproducible output | |
4740 | // so must sort the call stub symbols. | |
4741 | typedef typename Plt_stub_entries::const_iterator plt_iter; | |
4742 | std::vector<plt_iter> sorted; | |
4743 | sorted.resize(this->plt_call_stubs_.size()); | |
4744 | ||
4745 | for (plt_iter cs = this->plt_call_stubs_.begin(); | |
4746 | cs != this->plt_call_stubs_.end(); | |
4747 | ++cs) | |
bdab445c | 4748 | sorted[cs->second.indx_] = cs; |
590b87ff AM |
4749 | |
4750 | for (unsigned int i = 0; i < this->plt_call_stubs_.size(); ++i) | |
4751 | { | |
4752 | plt_iter cs = sorted[i]; | |
4753 | char add[10]; | |
4754 | add[0] = 0; | |
4755 | if (cs->first.addend_ != 0) | |
4756 | sprintf(add, "+%x", static_cast<uint32_t>(cs->first.addend_)); | |
94de2a2c JC |
4757 | char obj[10]; |
4758 | obj[0] = 0; | |
4759 | if (cs->first.object_) | |
590b87ff AM |
4760 | { |
4761 | const Powerpc_relobj<size, big_endian>* ppcobj = static_cast | |
4762 | <const Powerpc_relobj<size, big_endian>*>(cs->first.object_); | |
94de2a2c JC |
4763 | sprintf(obj, "%x:", ppcobj->uniq()); |
4764 | } | |
4765 | char localname[9]; | |
4766 | const char *symname; | |
4767 | if (cs->first.sym_ == NULL) | |
4768 | { | |
4769 | sprintf(localname, "%x", cs->first.locsym_); | |
590b87ff AM |
4770 | symname = localname; |
4771 | } | |
4772 | else | |
4773 | symname = cs->first.sym_->name(); | |
94de2a2c JC |
4774 | char* name = new char[8 + 10 + strlen(obj) + strlen(symname) + strlen(add) + 1]; |
4775 | sprintf(name, "%08x.plt_call.%s%s%s", this->uniq_, obj, symname, add); | |
bdab445c AM |
4776 | Address value |
4777 | = this->stub_address() - this->address() + cs->second.off_; | |
590b87ff AM |
4778 | unsigned int stub_size = this->plt_call_size(cs); |
4779 | this->targ_->define_local(symtab, name, this, value, stub_size); | |
4780 | } | |
4781 | } | |
4782 | ||
4783 | typedef typename Branch_stub_entries::const_iterator branch_iter; | |
4784 | for (branch_iter bs = this->long_branch_stubs_.begin(); | |
4785 | bs != this->long_branch_stubs_.end(); | |
4786 | ++bs) | |
4787 | { | |
4788 | if (bs->first.save_res_) | |
4789 | continue; | |
4790 | ||
4791 | char* name = new char[8 + 13 + 16 + 1]; | |
4792 | sprintf(name, "%08x.long_branch.%llx", this->uniq_, | |
4793 | static_cast<unsigned long long>(bs->first.dest_)); | |
4794 | Address value = (this->stub_address() - this->address() | |
4795 | + this->plt_size_ + bs->second); | |
4796 | unsigned int stub_size = this->branch_stub_size(bs); | |
4797 | this->targ_->define_local(symtab, name, this, value, stub_size); | |
4798 | } | |
4799 | } | |
4800 | ||
ec661b9d | 4801 | // Write out plt and long branch stub code. |
cf43a2fe AM |
4802 | |
4803 | template<int size, bool big_endian> | |
4804 | void | |
ec661b9d | 4805 | Stub_table<size, big_endian>::do_write(Output_file* of) |
cf43a2fe | 4806 | { |
ec661b9d AM |
4807 | if (this->plt_call_stubs_.empty() |
4808 | && this->long_branch_stubs_.empty()) | |
4809 | return; | |
4810 | ||
4811 | const section_size_type start_off = this->offset(); | |
4812 | const section_size_type off = this->stub_offset(); | |
42cacb20 | 4813 | const section_size_type oview_size = |
ec661b9d | 4814 | convert_to_section_size_type(this->data_size() - (off - start_off)); |
cf43a2fe | 4815 | unsigned char* const oview = of->get_output_view(off, oview_size); |
c9269dff | 4816 | unsigned char* p; |
42cacb20 | 4817 | |
cf43a2fe AM |
4818 | if (size == 64) |
4819 | { | |
ec661b9d AM |
4820 | const Output_data_got_powerpc<size, big_endian>* got |
4821 | = this->targ_->got_section(); | |
dd93cd0a | 4822 | Address got_os_addr = got->output_section()->address(); |
c9269dff | 4823 | |
ec661b9d | 4824 | if (!this->plt_call_stubs_.empty()) |
cf43a2fe | 4825 | { |
ec661b9d AM |
4826 | // The base address of the .plt section. |
4827 | Address plt_base = this->targ_->plt_section()->address(); | |
4828 | Address iplt_base = invalid_address; | |
4829 | ||
4830 | // Write out plt call stubs. | |
4831 | typename Plt_stub_entries::const_iterator cs; | |
4832 | for (cs = this->plt_call_stubs_.begin(); | |
4833 | cs != this->plt_call_stubs_.end(); | |
4834 | ++cs) | |
e5d5f5ed | 4835 | { |
91c2b899 AM |
4836 | bool is_iplt; |
4837 | Address pltoff = this->plt_off(cs, &is_iplt); | |
9e69ed50 | 4838 | Address plt_addr = pltoff; |
91c2b899 | 4839 | if (is_iplt) |
ec661b9d AM |
4840 | { |
4841 | if (iplt_base == invalid_address) | |
4842 | iplt_base = this->targ_->iplt_section()->address(); | |
4843 | plt_addr += iplt_base; | |
4844 | } | |
4845 | else | |
4846 | plt_addr += plt_base; | |
4847 | const Powerpc_relobj<size, big_endian>* ppcobj = static_cast | |
4848 | <const Powerpc_relobj<size, big_endian>*>(cs->first.object_); | |
4849 | Address got_addr = got_os_addr + ppcobj->toc_base_offset(); | |
9e69ed50 | 4850 | Address off = plt_addr - got_addr; |
ec661b9d | 4851 | |
9e69ed50 | 4852 | if (off + 0x80008000 > 0xffffffff || (off & 7) != 0) |
ec661b9d AM |
4853 | gold_error(_("%s: linkage table error against `%s'"), |
4854 | cs->first.object_->name().c_str(), | |
4855 | cs->first.sym_->demangled_name().c_str()); | |
4856 | ||
b4f7960d AM |
4857 | bool plt_load_toc = this->targ_->abiversion() < 2; |
4858 | bool static_chain | |
4859 | = plt_load_toc && parameters->options().plt_static_chain(); | |
4860 | bool thread_safe | |
4861 | = plt_load_toc && this->targ_->plt_thread_safe(); | |
9e69ed50 AM |
4862 | bool use_fake_dep = false; |
4863 | Address cmp_branch_off = 0; | |
4864 | if (thread_safe) | |
4865 | { | |
4866 | unsigned int pltindex | |
4867 | = ((pltoff - this->targ_->first_plt_entry_offset()) | |
4868 | / this->targ_->plt_entry_size()); | |
4869 | Address glinkoff | |
4870 | = (this->targ_->glink_section()->pltresolve_size | |
4871 | + pltindex * 8); | |
4872 | if (pltindex > 32768) | |
4873 | glinkoff += (pltindex - 32768) * 4; | |
4874 | Address to | |
4875 | = this->targ_->glink_section()->address() + glinkoff; | |
4876 | Address from | |
7e57d19e AM |
4877 | = (this->stub_address() + cs->second.off_ + 20 |
4878 | + 4 * cs->second.r2save_ | |
9e69ed50 AM |
4879 | + 4 * (ha(off) != 0) |
4880 | + 4 * (ha(off + 8 + 8 * static_chain) != ha(off)) | |
4881 | + 4 * static_chain); | |
4882 | cmp_branch_off = to - from; | |
4883 | use_fake_dep = cmp_branch_off + (1 << 25) >= (1 << 26); | |
4884 | } | |
4885 | ||
bdab445c | 4886 | p = oview + cs->second.off_; |
9e69ed50 | 4887 | if (ha(off) != 0) |
ec661b9d | 4888 | { |
7e57d19e AM |
4889 | if (cs->second.r2save_) |
4890 | { | |
4891 | write_insn<big_endian>(p, | |
4892 | std_2_1 + this->targ_->stk_toc()); | |
4893 | p += 4; | |
4894 | } | |
397998fc AM |
4895 | if (plt_load_toc) |
4896 | { | |
4897 | write_insn<big_endian>(p, addis_11_2 + ha(off)); | |
4898 | p += 4; | |
4899 | write_insn<big_endian>(p, ld_12_11 + l(off)); | |
4900 | p += 4; | |
4901 | } | |
4902 | else | |
4903 | { | |
4904 | write_insn<big_endian>(p, addis_12_2 + ha(off)); | |
4905 | p += 4; | |
4906 | write_insn<big_endian>(p, ld_12_12 + l(off)); | |
4907 | p += 4; | |
4908 | } | |
b4f7960d AM |
4909 | if (plt_load_toc |
4910 | && ha(off + 8 + 8 * static_chain) != ha(off)) | |
ec661b9d | 4911 | { |
b4f7960d AM |
4912 | write_insn<big_endian>(p, addi_11_11 + l(off)); |
4913 | p += 4; | |
9e69ed50 | 4914 | off = 0; |
ec661b9d | 4915 | } |
b4f7960d AM |
4916 | write_insn<big_endian>(p, mtctr_12); |
4917 | p += 4; | |
4918 | if (plt_load_toc) | |
9e69ed50 | 4919 | { |
b4f7960d AM |
4920 | if (use_fake_dep) |
4921 | { | |
4922 | write_insn<big_endian>(p, xor_2_12_12); | |
4923 | p += 4; | |
4924 | write_insn<big_endian>(p, add_11_11_2); | |
4925 | p += 4; | |
4926 | } | |
4927 | write_insn<big_endian>(p, ld_2_11 + l(off + 8)); | |
4928 | p += 4; | |
4929 | if (static_chain) | |
4930 | { | |
4931 | write_insn<big_endian>(p, ld_11_11 + l(off + 16)); | |
4932 | p += 4; | |
4933 | } | |
9e69ed50 | 4934 | } |
ec661b9d AM |
4935 | } |
4936 | else | |
4937 | { | |
7e57d19e AM |
4938 | if (cs->second.r2save_) |
4939 | { | |
4940 | write_insn<big_endian>(p, | |
4941 | std_2_1 + this->targ_->stk_toc()); | |
4942 | p += 4; | |
4943 | } | |
b4f7960d AM |
4944 | write_insn<big_endian>(p, ld_12_2 + l(off)); |
4945 | p += 4; | |
4946 | if (plt_load_toc | |
4947 | && ha(off + 8 + 8 * static_chain) != ha(off)) | |
ec661b9d | 4948 | { |
b4f7960d AM |
4949 | write_insn<big_endian>(p, addi_2_2 + l(off)); |
4950 | p += 4; | |
9e69ed50 | 4951 | off = 0; |
ec661b9d | 4952 | } |
b4f7960d AM |
4953 | write_insn<big_endian>(p, mtctr_12); |
4954 | p += 4; | |
4955 | if (plt_load_toc) | |
9e69ed50 | 4956 | { |
b4f7960d AM |
4957 | if (use_fake_dep) |
4958 | { | |
4959 | write_insn<big_endian>(p, xor_11_12_12); | |
4960 | p += 4; | |
4961 | write_insn<big_endian>(p, add_2_2_11); | |
4962 | p += 4; | |
4963 | } | |
4964 | if (static_chain) | |
4965 | { | |
4966 | write_insn<big_endian>(p, ld_11_2 + l(off + 16)); | |
4967 | p += 4; | |
4968 | } | |
4969 | write_insn<big_endian>(p, ld_2_2 + l(off + 8)); | |
4970 | p += 4; | |
9e69ed50 | 4971 | } |
ec661b9d | 4972 | } |
9e69ed50 AM |
4973 | if (thread_safe && !use_fake_dep) |
4974 | { | |
b4f7960d AM |
4975 | write_insn<big_endian>(p, cmpldi_2_0); |
4976 | p += 4; | |
4977 | write_insn<big_endian>(p, bnectr_p4); | |
4978 | p += 4; | |
9e69ed50 AM |
4979 | write_insn<big_endian>(p, b | (cmp_branch_off & 0x3fffffc)); |
4980 | } | |
4981 | else | |
4982 | write_insn<big_endian>(p, bctr); | |
e5d5f5ed | 4983 | } |
ec661b9d AM |
4984 | } |
4985 | ||
4986 | // Write out long branch stubs. | |
4987 | typename Branch_stub_entries::const_iterator bs; | |
4988 | for (bs = this->long_branch_stubs_.begin(); | |
4989 | bs != this->long_branch_stubs_.end(); | |
4990 | ++bs) | |
4991 | { | |
d49044c7 AM |
4992 | if (bs->first.save_res_) |
4993 | continue; | |
ec661b9d AM |
4994 | p = oview + this->plt_size_ + bs->second; |
4995 | Address loc = this->stub_address() + this->plt_size_ + bs->second; | |
4996 | Address delta = bs->first.dest_ - loc; | |
4997 | if (delta + (1 << 25) < 2 << 25) | |
4998 | write_insn<big_endian>(p, b | (delta & 0x3fffffc)); | |
e5d5f5ed | 4999 | else |
cf43a2fe | 5000 | { |
ec661b9d AM |
5001 | Address brlt_addr |
5002 | = this->targ_->find_branch_lookup_table(bs->first.dest_); | |
5003 | gold_assert(brlt_addr != invalid_address); | |
5004 | brlt_addr += this->targ_->brlt_section()->address(); | |
5005 | Address got_addr = got_os_addr + bs->first.toc_base_off_; | |
5006 | Address brltoff = brlt_addr - got_addr; | |
5007 | if (ha(brltoff) == 0) | |
5008 | { | |
b4f7960d | 5009 | write_insn<big_endian>(p, ld_12_2 + l(brltoff)), p += 4; |
ec661b9d AM |
5010 | } |
5011 | else | |
cf43a2fe | 5012 | { |
397998fc AM |
5013 | write_insn<big_endian>(p, addis_12_2 + ha(brltoff)), p += 4; |
5014 | write_insn<big_endian>(p, ld_12_12 + l(brltoff)), p += 4; | |
cf43a2fe | 5015 | } |
b4f7960d | 5016 | write_insn<big_endian>(p, mtctr_12), p += 4; |
ec661b9d | 5017 | write_insn<big_endian>(p, bctr); |
cf43a2fe | 5018 | } |
ec661b9d AM |
5019 | } |
5020 | } | |
5021 | else | |
5022 | { | |
5023 | if (!this->plt_call_stubs_.empty()) | |
5024 | { | |
5025 | // The base address of the .plt section. | |
5026 | Address plt_base = this->targ_->plt_section()->address(); | |
5027 | Address iplt_base = invalid_address; | |
5028 | // The address of _GLOBAL_OFFSET_TABLE_. | |
5029 | Address g_o_t = invalid_address; | |
5030 | ||
5031 | // Write out plt call stubs. | |
5032 | typename Plt_stub_entries::const_iterator cs; | |
5033 | for (cs = this->plt_call_stubs_.begin(); | |
5034 | cs != this->plt_call_stubs_.end(); | |
5035 | ++cs) | |
cf43a2fe | 5036 | { |
91c2b899 AM |
5037 | bool is_iplt; |
5038 | Address plt_addr = this->plt_off(cs, &is_iplt); | |
5039 | if (is_iplt) | |
ec661b9d AM |
5040 | { |
5041 | if (iplt_base == invalid_address) | |
5042 | iplt_base = this->targ_->iplt_section()->address(); | |
5043 | plt_addr += iplt_base; | |
5044 | } | |
5045 | else | |
5046 | plt_addr += plt_base; | |
5047 | ||
bdab445c | 5048 | p = oview + cs->second.off_; |
ec661b9d AM |
5049 | if (parameters->options().output_is_position_independent()) |
5050 | { | |
5051 | Address got_addr; | |
5052 | const Powerpc_relobj<size, big_endian>* ppcobj | |
5053 | = (static_cast<const Powerpc_relobj<size, big_endian>*> | |
5054 | (cs->first.object_)); | |
5055 | if (ppcobj != NULL && cs->first.addend_ >= 32768) | |
5056 | { | |
5057 | unsigned int got2 = ppcobj->got2_shndx(); | |
5058 | got_addr = ppcobj->get_output_section_offset(got2); | |
5059 | gold_assert(got_addr != invalid_address); | |
5060 | got_addr += (ppcobj->output_section(got2)->address() | |
5061 | + cs->first.addend_); | |
5062 | } | |
5063 | else | |
5064 | { | |
5065 | if (g_o_t == invalid_address) | |
5066 | { | |
5067 | const Output_data_got_powerpc<size, big_endian>* got | |
5068 | = this->targ_->got_section(); | |
5069 | g_o_t = got->address() + got->g_o_t(); | |
5070 | } | |
5071 | got_addr = g_o_t; | |
5072 | } | |
5073 | ||
9e69ed50 AM |
5074 | Address off = plt_addr - got_addr; |
5075 | if (ha(off) == 0) | |
ec661b9d | 5076 | { |
9e69ed50 | 5077 | write_insn<big_endian>(p + 0, lwz_11_30 + l(off)); |
ec661b9d AM |
5078 | write_insn<big_endian>(p + 4, mtctr_11); |
5079 | write_insn<big_endian>(p + 8, bctr); | |
5080 | } | |
5081 | else | |
5082 | { | |
9e69ed50 AM |
5083 | write_insn<big_endian>(p + 0, addis_11_30 + ha(off)); |
5084 | write_insn<big_endian>(p + 4, lwz_11_11 + l(off)); | |
ec661b9d AM |
5085 | write_insn<big_endian>(p + 8, mtctr_11); |
5086 | write_insn<big_endian>(p + 12, bctr); | |
5087 | } | |
5088 | } | |
5089 | else | |
5090 | { | |
5091 | write_insn<big_endian>(p + 0, lis_11 + ha(plt_addr)); | |
5092 | write_insn<big_endian>(p + 4, lwz_11_11 + l(plt_addr)); | |
5093 | write_insn<big_endian>(p + 8, mtctr_11); | |
5094 | write_insn<big_endian>(p + 12, bctr); | |
5095 | } | |
5096 | } | |
5097 | } | |
5098 | ||
5099 | // Write out long branch stubs. | |
5100 | typename Branch_stub_entries::const_iterator bs; | |
5101 | for (bs = this->long_branch_stubs_.begin(); | |
5102 | bs != this->long_branch_stubs_.end(); | |
5103 | ++bs) | |
5104 | { | |
d49044c7 AM |
5105 | if (bs->first.save_res_) |
5106 | continue; | |
ec661b9d AM |
5107 | p = oview + this->plt_size_ + bs->second; |
5108 | Address loc = this->stub_address() + this->plt_size_ + bs->second; | |
5109 | Address delta = bs->first.dest_ - loc; | |
5110 | if (delta + (1 << 25) < 2 << 25) | |
5111 | write_insn<big_endian>(p, b | (delta & 0x3fffffc)); | |
5112 | else if (!parameters->options().output_is_position_independent()) | |
5113 | { | |
5114 | write_insn<big_endian>(p + 0, lis_12 + ha(bs->first.dest_)); | |
5115 | write_insn<big_endian>(p + 4, addi_12_12 + l(bs->first.dest_)); | |
5116 | write_insn<big_endian>(p + 8, mtctr_12); | |
5117 | write_insn<big_endian>(p + 12, bctr); | |
5118 | } | |
5119 | else | |
5120 | { | |
5121 | delta -= 8; | |
5122 | write_insn<big_endian>(p + 0, mflr_0); | |
5123 | write_insn<big_endian>(p + 4, bcl_20_31); | |
5124 | write_insn<big_endian>(p + 8, mflr_12); | |
5125 | write_insn<big_endian>(p + 12, addis_12_12 + ha(delta)); | |
5126 | write_insn<big_endian>(p + 16, addi_12_12 + l(delta)); | |
5127 | write_insn<big_endian>(p + 20, mtlr_0); | |
5128 | write_insn<big_endian>(p + 24, mtctr_12); | |
5129 | write_insn<big_endian>(p + 28, bctr); | |
cf43a2fe AM |
5130 | } |
5131 | } | |
ec661b9d | 5132 | } |
d49044c7 AM |
5133 | if (this->need_save_res_) |
5134 | { | |
5135 | p = oview + this->plt_size_ + this->branch_size_; | |
5136 | memcpy (p, this->targ_->savres_section()->contents(), | |
5137 | this->targ_->savres_section()->data_size()); | |
5138 | } | |
ec661b9d AM |
5139 | } |
5140 | ||
5141 | // Write out .glink. | |
5142 | ||
5143 | template<int size, bool big_endian> | |
5144 | void | |
5145 | Output_data_glink<size, big_endian>::do_write(Output_file* of) | |
5146 | { | |
5147 | const section_size_type off = this->offset(); | |
5148 | const section_size_type oview_size = | |
5149 | convert_to_section_size_type(this->data_size()); | |
5150 | unsigned char* const oview = of->get_output_view(off, oview_size); | |
5151 | unsigned char* p; | |
5152 | ||
5153 | // The base address of the .plt section. | |
5154 | typedef typename elfcpp::Elf_types<size>::Elf_Addr Address; | |
5155 | Address plt_base = this->targ_->plt_section()->address(); | |
cf43a2fe | 5156 | |
ec661b9d AM |
5157 | if (size == 64) |
5158 | { | |
9055360d | 5159 | if (this->end_branch_table_ != 0) |
b4f7960d | 5160 | { |
9055360d AM |
5161 | // Write pltresolve stub. |
5162 | p = oview; | |
5163 | Address after_bcl = this->address() + 16; | |
5164 | Address pltoff = plt_base - after_bcl; | |
5165 | ||
5166 | elfcpp::Swap<64, big_endian>::writeval(p, pltoff), p += 8; | |
cf43a2fe | 5167 | |
b4f7960d | 5168 | if (this->targ_->abiversion() < 2) |
cf43a2fe | 5169 | { |
9055360d AM |
5170 | write_insn<big_endian>(p, mflr_12), p += 4; |
5171 | write_insn<big_endian>(p, bcl_20_31), p += 4; | |
5172 | write_insn<big_endian>(p, mflr_11), p += 4; | |
5173 | write_insn<big_endian>(p, ld_2_11 + l(-16)), p += 4; | |
5174 | write_insn<big_endian>(p, mtlr_12), p += 4; | |
5175 | write_insn<big_endian>(p, add_11_2_11), p += 4; | |
5176 | write_insn<big_endian>(p, ld_12_11 + 0), p += 4; | |
5177 | write_insn<big_endian>(p, ld_2_11 + 8), p += 4; | |
5178 | write_insn<big_endian>(p, mtctr_12), p += 4; | |
5179 | write_insn<big_endian>(p, ld_11_11 + 16), p += 4; | |
5180 | } | |
5181 | else | |
5182 | { | |
5183 | write_insn<big_endian>(p, mflr_0), p += 4; | |
5184 | write_insn<big_endian>(p, bcl_20_31), p += 4; | |
5185 | write_insn<big_endian>(p, mflr_11), p += 4; | |
5186 | write_insn<big_endian>(p, ld_2_11 + l(-16)), p += 4; | |
5187 | write_insn<big_endian>(p, mtlr_0), p += 4; | |
5188 | write_insn<big_endian>(p, sub_12_12_11), p += 4; | |
5189 | write_insn<big_endian>(p, add_11_2_11), p += 4; | |
5190 | write_insn<big_endian>(p, addi_0_12 + l(-48)), p += 4; | |
5191 | write_insn<big_endian>(p, ld_12_11 + 0), p += 4; | |
5192 | write_insn<big_endian>(p, srdi_0_0_2), p += 4; | |
5193 | write_insn<big_endian>(p, mtctr_12), p += 4; | |
5194 | write_insn<big_endian>(p, ld_11_11 + 8), p += 4; | |
5195 | } | |
5196 | write_insn<big_endian>(p, bctr), p += 4; | |
5197 | while (p < oview + this->pltresolve_size) | |
5198 | write_insn<big_endian>(p, nop), p += 4; | |
5199 | ||
5200 | // Write lazy link call stubs. | |
5201 | uint32_t indx = 0; | |
5202 | while (p < oview + this->end_branch_table_) | |
5203 | { | |
5204 | if (this->targ_->abiversion() < 2) | |
b4f7960d | 5205 | { |
9055360d AM |
5206 | if (indx < 0x8000) |
5207 | { | |
5208 | write_insn<big_endian>(p, li_0_0 + indx), p += 4; | |
5209 | } | |
5210 | else | |
5211 | { | |
bbec1a5d | 5212 | write_insn<big_endian>(p, lis_0 + hi(indx)), p += 4; |
9055360d AM |
5213 | write_insn<big_endian>(p, ori_0_0_0 + l(indx)), p += 4; |
5214 | } | |
b4f7960d | 5215 | } |
9055360d AM |
5216 | uint32_t branch_off = 8 - (p - oview); |
5217 | write_insn<big_endian>(p, b + (branch_off & 0x3fffffc)), p += 4; | |
5218 | indx++; | |
cf43a2fe | 5219 | } |
9055360d AM |
5220 | } |
5221 | ||
5222 | Address plt_base = this->targ_->plt_section()->address(); | |
5223 | Address iplt_base = invalid_address; | |
5224 | unsigned int global_entry_off = (this->end_branch_table_ + 15) & -16; | |
5225 | Address global_entry_base = this->address() + global_entry_off; | |
5226 | typename Global_entry_stub_entries::const_iterator ge; | |
5227 | for (ge = this->global_entry_stubs_.begin(); | |
5228 | ge != this->global_entry_stubs_.end(); | |
5229 | ++ge) | |
5230 | { | |
5231 | p = oview + global_entry_off + ge->second; | |
5232 | Address plt_addr = ge->first->plt_offset(); | |
5233 | if (ge->first->type() == elfcpp::STT_GNU_IFUNC | |
5234 | && ge->first->can_use_relative_reloc(false)) | |
5235 | { | |
5236 | if (iplt_base == invalid_address) | |
5237 | iplt_base = this->targ_->iplt_section()->address(); | |
5238 | plt_addr += iplt_base; | |
5239 | } | |
5240 | else | |
5241 | plt_addr += plt_base; | |
5242 | Address my_addr = global_entry_base + ge->second; | |
5243 | Address off = plt_addr - my_addr; | |
5244 | ||
5245 | if (off + 0x80008000 > 0xffffffff || (off & 3) != 0) | |
5246 | gold_error(_("%s: linkage table error against `%s'"), | |
5247 | ge->first->object()->name().c_str(), | |
5248 | ge->first->demangled_name().c_str()); | |
5249 | ||
5250 | write_insn<big_endian>(p, addis_12_12 + ha(off)), p += 4; | |
5251 | write_insn<big_endian>(p, ld_12_12 + l(off)), p += 4; | |
5252 | write_insn<big_endian>(p, mtctr_12), p += 4; | |
5253 | write_insn<big_endian>(p, bctr); | |
cf43a2fe AM |
5254 | } |
5255 | } | |
5256 | else | |
5257 | { | |
ec661b9d AM |
5258 | const Output_data_got_powerpc<size, big_endian>* got |
5259 | = this->targ_->got_section(); | |
dd93cd0a AM |
5260 | // The address of _GLOBAL_OFFSET_TABLE_. |
5261 | Address g_o_t = got->address() + got->g_o_t(); | |
c9269dff | 5262 | |
cf43a2fe | 5263 | // Write out pltresolve branch table. |
ec661b9d | 5264 | p = oview; |
cf43a2fe | 5265 | unsigned int the_end = oview_size - this->pltresolve_size; |
c9269dff | 5266 | unsigned char* end_p = oview + the_end; |
cf43a2fe AM |
5267 | while (p < end_p - 8 * 4) |
5268 | write_insn<big_endian>(p, b + end_p - p), p += 4; | |
5269 | while (p < end_p) | |
5270 | write_insn<big_endian>(p, nop), p += 4; | |
42cacb20 | 5271 | |
cf43a2fe AM |
5272 | // Write out pltresolve call stub. |
5273 | if (parameters->options().output_is_position_independent()) | |
42cacb20 | 5274 | { |
ec661b9d | 5275 | Address res0_off = 0; |
dd93cd0a AM |
5276 | Address after_bcl_off = the_end + 12; |
5277 | Address bcl_res0 = after_bcl_off - res0_off; | |
cf43a2fe AM |
5278 | |
5279 | write_insn<big_endian>(p + 0, addis_11_11 + ha(bcl_res0)); | |
5280 | write_insn<big_endian>(p + 4, mflr_0); | |
5281 | write_insn<big_endian>(p + 8, bcl_20_31); | |
5282 | write_insn<big_endian>(p + 12, addi_11_11 + l(bcl_res0)); | |
5283 | write_insn<big_endian>(p + 16, mflr_12); | |
5284 | write_insn<big_endian>(p + 20, mtlr_0); | |
5285 | write_insn<big_endian>(p + 24, sub_11_11_12); | |
5286 | ||
dd93cd0a | 5287 | Address got_bcl = g_o_t + 4 - (after_bcl_off + this->address()); |
cf43a2fe AM |
5288 | |
5289 | write_insn<big_endian>(p + 28, addis_12_12 + ha(got_bcl)); | |
5290 | if (ha(got_bcl) == ha(got_bcl + 4)) | |
5291 | { | |
5292 | write_insn<big_endian>(p + 32, lwz_0_12 + l(got_bcl)); | |
5293 | write_insn<big_endian>(p + 36, lwz_12_12 + l(got_bcl + 4)); | |
5294 | } | |
5295 | else | |
5296 | { | |
5297 | write_insn<big_endian>(p + 32, lwzu_0_12 + l(got_bcl)); | |
5298 | write_insn<big_endian>(p + 36, lwz_12_12 + 4); | |
5299 | } | |
5300 | write_insn<big_endian>(p + 40, mtctr_0); | |
5301 | write_insn<big_endian>(p + 44, add_0_11_11); | |
5302 | write_insn<big_endian>(p + 48, add_11_0_11); | |
5303 | write_insn<big_endian>(p + 52, bctr); | |
5304 | write_insn<big_endian>(p + 56, nop); | |
5305 | write_insn<big_endian>(p + 60, nop); | |
42cacb20 | 5306 | } |
cf43a2fe | 5307 | else |
42cacb20 | 5308 | { |
ec661b9d | 5309 | Address res0 = this->address(); |
cf43a2fe AM |
5310 | |
5311 | write_insn<big_endian>(p + 0, lis_12 + ha(g_o_t + 4)); | |
5312 | write_insn<big_endian>(p + 4, addis_11_11 + ha(-res0)); | |
5313 | if (ha(g_o_t + 4) == ha(g_o_t + 8)) | |
5314 | write_insn<big_endian>(p + 8, lwz_0_12 + l(g_o_t + 4)); | |
5315 | else | |
5316 | write_insn<big_endian>(p + 8, lwzu_0_12 + l(g_o_t + 4)); | |
5317 | write_insn<big_endian>(p + 12, addi_11_11 + l(-res0)); | |
5318 | write_insn<big_endian>(p + 16, mtctr_0); | |
5319 | write_insn<big_endian>(p + 20, add_0_11_11); | |
5320 | if (ha(g_o_t + 4) == ha(g_o_t + 8)) | |
5321 | write_insn<big_endian>(p + 24, lwz_12_12 + l(g_o_t + 8)); | |
5322 | else | |
5323 | write_insn<big_endian>(p + 24, lwz_12_12 + 4); | |
5324 | write_insn<big_endian>(p + 28, add_11_0_11); | |
5325 | write_insn<big_endian>(p + 32, bctr); | |
5326 | write_insn<big_endian>(p + 36, nop); | |
5327 | write_insn<big_endian>(p + 40, nop); | |
5328 | write_insn<big_endian>(p + 44, nop); | |
5329 | write_insn<big_endian>(p + 48, nop); | |
5330 | write_insn<big_endian>(p + 52, nop); | |
5331 | write_insn<big_endian>(p + 56, nop); | |
5332 | write_insn<big_endian>(p + 60, nop); | |
42cacb20 | 5333 | } |
cf43a2fe | 5334 | p += 64; |
42cacb20 DE |
5335 | } |
5336 | ||
cf43a2fe AM |
5337 | of->write_output_view(off, oview_size, oview); |
5338 | } | |
5339 | ||
f3a0ed29 AM |
5340 | |
5341 | // A class to handle linker generated save/restore functions. | |
5342 | ||
5343 | template<int size, bool big_endian> | |
5344 | class Output_data_save_res : public Output_section_data_build | |
5345 | { | |
5346 | public: | |
5347 | Output_data_save_res(Symbol_table* symtab); | |
5348 | ||
d49044c7 AM |
5349 | const unsigned char* |
5350 | contents() const | |
5351 | { | |
5352 | return contents_; | |
5353 | } | |
5354 | ||
f3a0ed29 AM |
5355 | protected: |
5356 | // Write to a map file. | |
5357 | void | |
5358 | do_print_to_mapfile(Mapfile* mapfile) const | |
5359 | { mapfile->print_output_data(this, _("** save/restore")); } | |
5360 | ||
5361 | void | |
5362 | do_write(Output_file*); | |
5363 | ||
5364 | private: | |
5365 | // The maximum size of save/restore contents. | |
5366 | static const unsigned int savres_max = 218*4; | |
5367 | ||
5368 | void | |
5369 | savres_define(Symbol_table* symtab, | |
5370 | const char *name, | |
5371 | unsigned int lo, unsigned int hi, | |
5372 | unsigned char* write_ent(unsigned char*, int), | |
5373 | unsigned char* write_tail(unsigned char*, int)); | |
5374 | ||
5375 | unsigned char *contents_; | |
5376 | }; | |
5377 | ||
5378 | template<bool big_endian> | |
5379 | static unsigned char* | |
5380 | savegpr0(unsigned char* p, int r) | |
5381 | { | |
5382 | uint32_t insn = std_0_1 + (r << 21) + (1 << 16) - (32 - r) * 8; | |
5383 | write_insn<big_endian>(p, insn); | |
5384 | return p + 4; | |
5385 | } | |
5386 | ||
5387 | template<bool big_endian> | |
5388 | static unsigned char* | |
5389 | savegpr0_tail(unsigned char* p, int r) | |
5390 | { | |
5391 | p = savegpr0<big_endian>(p, r); | |
5392 | uint32_t insn = std_0_1 + 16; | |
5393 | write_insn<big_endian>(p, insn); | |
5394 | p = p + 4; | |
5395 | write_insn<big_endian>(p, blr); | |
5396 | return p + 4; | |
5397 | } | |
5398 | ||
5399 | template<bool big_endian> | |
62fe925a | 5400 | static unsigned char* |
f3a0ed29 AM |
5401 | restgpr0(unsigned char* p, int r) |
5402 | { | |
5403 | uint32_t insn = ld_0_1 + (r << 21) + (1 << 16) - (32 - r) * 8; | |
5404 | write_insn<big_endian>(p, insn); | |
5405 | return p + 4; | |
5406 | } | |
5407 | ||
5408 | template<bool big_endian> | |
62fe925a | 5409 | static unsigned char* |
f3a0ed29 AM |
5410 | restgpr0_tail(unsigned char* p, int r) |
5411 | { | |
5412 | uint32_t insn = ld_0_1 + 16; | |
5413 | write_insn<big_endian>(p, insn); | |
5414 | p = p + 4; | |
5415 | p = restgpr0<big_endian>(p, r); | |
5416 | write_insn<big_endian>(p, mtlr_0); | |
5417 | p = p + 4; | |
5418 | if (r == 29) | |
5419 | { | |
5420 | p = restgpr0<big_endian>(p, 30); | |
5421 | p = restgpr0<big_endian>(p, 31); | |
5422 | } | |
5423 | write_insn<big_endian>(p, blr); | |
5424 | return p + 4; | |
5425 | } | |
5426 | ||
5427 | template<bool big_endian> | |
62fe925a | 5428 | static unsigned char* |
f3a0ed29 AM |
5429 | savegpr1(unsigned char* p, int r) |
5430 | { | |
5431 | uint32_t insn = std_0_12 + (r << 21) + (1 << 16) - (32 - r) * 8; | |
5432 | write_insn<big_endian>(p, insn); | |
5433 | return p + 4; | |
5434 | } | |
5435 | ||
5436 | template<bool big_endian> | |
62fe925a | 5437 | static unsigned char* |
f3a0ed29 AM |
5438 | savegpr1_tail(unsigned char* p, int r) |
5439 | { | |
5440 | p = savegpr1<big_endian>(p, r); | |
5441 | write_insn<big_endian>(p, blr); | |
5442 | return p + 4; | |
5443 | } | |
5444 | ||
5445 | template<bool big_endian> | |
62fe925a | 5446 | static unsigned char* |
f3a0ed29 AM |
5447 | restgpr1(unsigned char* p, int r) |
5448 | { | |
5449 | uint32_t insn = ld_0_12 + (r << 21) + (1 << 16) - (32 - r) * 8; | |
5450 | write_insn<big_endian>(p, insn); | |
5451 | return p + 4; | |
5452 | } | |
5453 | ||
5454 | template<bool big_endian> | |
62fe925a | 5455 | static unsigned char* |
f3a0ed29 AM |
5456 | restgpr1_tail(unsigned char* p, int r) |
5457 | { | |
5458 | p = restgpr1<big_endian>(p, r); | |
5459 | write_insn<big_endian>(p, blr); | |
5460 | return p + 4; | |
5461 | } | |
5462 | ||
5463 | template<bool big_endian> | |
62fe925a | 5464 | static unsigned char* |
f3a0ed29 AM |
5465 | savefpr(unsigned char* p, int r) |
5466 | { | |
5467 | uint32_t insn = stfd_0_1 + (r << 21) + (1 << 16) - (32 - r) * 8; | |
5468 | write_insn<big_endian>(p, insn); | |
5469 | return p + 4; | |
5470 | } | |
5471 | ||
5472 | template<bool big_endian> | |
62fe925a | 5473 | static unsigned char* |
f3a0ed29 AM |
5474 | savefpr0_tail(unsigned char* p, int r) |
5475 | { | |
5476 | p = savefpr<big_endian>(p, r); | |
5477 | write_insn<big_endian>(p, std_0_1 + 16); | |
5478 | p = p + 4; | |
5479 | write_insn<big_endian>(p, blr); | |
5480 | return p + 4; | |
5481 | } | |
5482 | ||
5483 | template<bool big_endian> | |
62fe925a | 5484 | static unsigned char* |
f3a0ed29 AM |
5485 | restfpr(unsigned char* p, int r) |
5486 | { | |
5487 | uint32_t insn = lfd_0_1 + (r << 21) + (1 << 16) - (32 - r) * 8; | |
5488 | write_insn<big_endian>(p, insn); | |
5489 | return p + 4; | |
5490 | } | |
5491 | ||
5492 | template<bool big_endian> | |
62fe925a | 5493 | static unsigned char* |
f3a0ed29 AM |
5494 | restfpr0_tail(unsigned char* p, int r) |
5495 | { | |
5496 | write_insn<big_endian>(p, ld_0_1 + 16); | |
5497 | p = p + 4; | |
5498 | p = restfpr<big_endian>(p, r); | |
5499 | write_insn<big_endian>(p, mtlr_0); | |
5500 | p = p + 4; | |
5501 | if (r == 29) | |
5502 | { | |
5503 | p = restfpr<big_endian>(p, 30); | |
5504 | p = restfpr<big_endian>(p, 31); | |
5505 | } | |
5506 | write_insn<big_endian>(p, blr); | |
5507 | return p + 4; | |
5508 | } | |
5509 | ||
5510 | template<bool big_endian> | |
62fe925a | 5511 | static unsigned char* |
f3a0ed29 AM |
5512 | savefpr1_tail(unsigned char* p, int r) |
5513 | { | |
5514 | p = savefpr<big_endian>(p, r); | |
5515 | write_insn<big_endian>(p, blr); | |
5516 | return p + 4; | |
5517 | } | |
5518 | ||
5519 | template<bool big_endian> | |
62fe925a | 5520 | static unsigned char* |
f3a0ed29 AM |
5521 | restfpr1_tail(unsigned char* p, int r) |
5522 | { | |
5523 | p = restfpr<big_endian>(p, r); | |
5524 | write_insn<big_endian>(p, blr); | |
5525 | return p + 4; | |
5526 | } | |
5527 | ||
5528 | template<bool big_endian> | |
62fe925a | 5529 | static unsigned char* |
f3a0ed29 AM |
5530 | savevr(unsigned char* p, int r) |
5531 | { | |
5532 | uint32_t insn = li_12_0 + (1 << 16) - (32 - r) * 16; | |
5533 | write_insn<big_endian>(p, insn); | |
5534 | p = p + 4; | |
5535 | insn = stvx_0_12_0 + (r << 21); | |
5536 | write_insn<big_endian>(p, insn); | |
5537 | return p + 4; | |
5538 | } | |
5539 | ||
5540 | template<bool big_endian> | |
62fe925a | 5541 | static unsigned char* |
f3a0ed29 AM |
5542 | savevr_tail(unsigned char* p, int r) |
5543 | { | |
5544 | p = savevr<big_endian>(p, r); | |
5545 | write_insn<big_endian>(p, blr); | |
5546 | return p + 4; | |
5547 | } | |
5548 | ||
5549 | template<bool big_endian> | |
62fe925a | 5550 | static unsigned char* |
f3a0ed29 AM |
5551 | restvr(unsigned char* p, int r) |
5552 | { | |
5553 | uint32_t insn = li_12_0 + (1 << 16) - (32 - r) * 16; | |
5554 | write_insn<big_endian>(p, insn); | |
5555 | p = p + 4; | |
5556 | insn = lvx_0_12_0 + (r << 21); | |
5557 | write_insn<big_endian>(p, insn); | |
5558 | return p + 4; | |
5559 | } | |
5560 | ||
5561 | template<bool big_endian> | |
62fe925a | 5562 | static unsigned char* |
f3a0ed29 AM |
5563 | restvr_tail(unsigned char* p, int r) |
5564 | { | |
5565 | p = restvr<big_endian>(p, r); | |
5566 | write_insn<big_endian>(p, blr); | |
5567 | return p + 4; | |
5568 | } | |
5569 | ||
5570 | ||
5571 | template<int size, bool big_endian> | |
5572 | Output_data_save_res<size, big_endian>::Output_data_save_res( | |
5573 | Symbol_table* symtab) | |
5574 | : Output_section_data_build(4), | |
5575 | contents_(NULL) | |
5576 | { | |
5577 | this->savres_define(symtab, | |
5578 | "_savegpr0_", 14, 31, | |
5579 | savegpr0<big_endian>, savegpr0_tail<big_endian>); | |
5580 | this->savres_define(symtab, | |
5581 | "_restgpr0_", 14, 29, | |
5582 | restgpr0<big_endian>, restgpr0_tail<big_endian>); | |
5583 | this->savres_define(symtab, | |
5584 | "_restgpr0_", 30, 31, | |
5585 | restgpr0<big_endian>, restgpr0_tail<big_endian>); | |
5586 | this->savres_define(symtab, | |
5587 | "_savegpr1_", 14, 31, | |
5588 | savegpr1<big_endian>, savegpr1_tail<big_endian>); | |
5589 | this->savres_define(symtab, | |
5590 | "_restgpr1_", 14, 31, | |
5591 | restgpr1<big_endian>, restgpr1_tail<big_endian>); | |
5592 | this->savres_define(symtab, | |
5593 | "_savefpr_", 14, 31, | |
5594 | savefpr<big_endian>, savefpr0_tail<big_endian>); | |
5595 | this->savres_define(symtab, | |
5596 | "_restfpr_", 14, 29, | |
5597 | restfpr<big_endian>, restfpr0_tail<big_endian>); | |
5598 | this->savres_define(symtab, | |
5599 | "_restfpr_", 30, 31, | |
5600 | restfpr<big_endian>, restfpr0_tail<big_endian>); | |
5601 | this->savres_define(symtab, | |
5602 | "._savef", 14, 31, | |
5603 | savefpr<big_endian>, savefpr1_tail<big_endian>); | |
5604 | this->savres_define(symtab, | |
5605 | "._restf", 14, 31, | |
5606 | restfpr<big_endian>, restfpr1_tail<big_endian>); | |
5607 | this->savres_define(symtab, | |
5608 | "_savevr_", 20, 31, | |
5609 | savevr<big_endian>, savevr_tail<big_endian>); | |
5610 | this->savres_define(symtab, | |
5611 | "_restvr_", 20, 31, | |
5612 | restvr<big_endian>, restvr_tail<big_endian>); | |
5613 | } | |
5614 | ||
5615 | template<int size, bool big_endian> | |
5616 | void | |
5617 | Output_data_save_res<size, big_endian>::savres_define( | |
5618 | Symbol_table* symtab, | |
5619 | const char *name, | |
5620 | unsigned int lo, unsigned int hi, | |
5621 | unsigned char* write_ent(unsigned char*, int), | |
5622 | unsigned char* write_tail(unsigned char*, int)) | |
5623 | { | |
5624 | size_t len = strlen(name); | |
5625 | bool writing = false; | |
5626 | char sym[16]; | |
5627 | ||
5628 | memcpy(sym, name, len); | |
5629 | sym[len + 2] = 0; | |
5630 | ||
5631 | for (unsigned int i = lo; i <= hi; i++) | |
5632 | { | |
5633 | sym[len + 0] = i / 10 + '0'; | |
5634 | sym[len + 1] = i % 10 + '0'; | |
5635 | Symbol* gsym = symtab->lookup(sym); | |
5636 | bool refd = gsym != NULL && gsym->is_undefined(); | |
5637 | writing = writing || refd; | |
5638 | if (writing) | |
5639 | { | |
5640 | if (this->contents_ == NULL) | |
5641 | this->contents_ = new unsigned char[this->savres_max]; | |
5642 | ||
ec661b9d | 5643 | section_size_type value = this->current_data_size(); |
f3a0ed29 AM |
5644 | unsigned char* p = this->contents_ + value; |
5645 | if (i != hi) | |
5646 | p = write_ent(p, i); | |
5647 | else | |
5648 | p = write_tail(p, i); | |
ec661b9d | 5649 | section_size_type cur_size = p - this->contents_; |
f3a0ed29 AM |
5650 | this->set_current_data_size(cur_size); |
5651 | if (refd) | |
5652 | symtab->define_in_output_data(sym, NULL, Symbol_table::PREDEFINED, | |
5653 | this, value, cur_size - value, | |
5654 | elfcpp::STT_FUNC, elfcpp::STB_GLOBAL, | |
5655 | elfcpp::STV_HIDDEN, 0, false, false); | |
5656 | } | |
5657 | } | |
5658 | } | |
5659 | ||
5660 | // Write out save/restore. | |
5661 | ||
5662 | template<int size, bool big_endian> | |
5663 | void | |
5664 | Output_data_save_res<size, big_endian>::do_write(Output_file* of) | |
5665 | { | |
ec661b9d | 5666 | const section_size_type off = this->offset(); |
f3a0ed29 AM |
5667 | const section_size_type oview_size = |
5668 | convert_to_section_size_type(this->data_size()); | |
5669 | unsigned char* const oview = of->get_output_view(off, oview_size); | |
5670 | memcpy(oview, this->contents_, oview_size); | |
5671 | of->write_output_view(off, oview_size, oview); | |
5672 | } | |
5673 | ||
5674 | ||
cf43a2fe | 5675 | // Create the glink section. |
42cacb20 | 5676 | |
cf43a2fe AM |
5677 | template<int size, bool big_endian> |
5678 | void | |
5679 | Target_powerpc<size, big_endian>::make_glink_section(Layout* layout) | |
5680 | { | |
5681 | if (this->glink_ == NULL) | |
5682 | { | |
5683 | this->glink_ = new Output_data_glink<size, big_endian>(this); | |
9d5781f8 | 5684 | this->glink_->add_eh_frame(layout); |
cf43a2fe AM |
5685 | layout->add_output_section_data(".text", elfcpp::SHT_PROGBITS, |
5686 | elfcpp::SHF_ALLOC | elfcpp::SHF_EXECINSTR, | |
5687 | this->glink_, ORDER_TEXT, false); | |
5688 | } | |
42cacb20 DE |
5689 | } |
5690 | ||
5691 | // Create a PLT entry for a global symbol. | |
5692 | ||
5693 | template<int size, bool big_endian> | |
5694 | void | |
ec661b9d AM |
5695 | Target_powerpc<size, big_endian>::make_plt_entry(Symbol_table* symtab, |
5696 | Layout* layout, | |
5697 | Symbol* gsym) | |
42cacb20 | 5698 | { |
e5d5f5ed AM |
5699 | if (gsym->type() == elfcpp::STT_GNU_IFUNC |
5700 | && gsym->can_use_relative_reloc(false)) | |
5701 | { | |
5702 | if (this->iplt_ == NULL) | |
40b469d7 | 5703 | this->make_iplt_section(symtab, layout); |
03e25981 | 5704 | this->iplt_->add_ifunc_entry(gsym); |
e5d5f5ed AM |
5705 | } |
5706 | else | |
5707 | { | |
5708 | if (this->plt_ == NULL) | |
40b469d7 | 5709 | this->make_plt_section(symtab, layout); |
03e25981 | 5710 | this->plt_->add_entry(gsym); |
e5d5f5ed | 5711 | } |
e5d5f5ed | 5712 | } |
42cacb20 | 5713 | |
e5d5f5ed | 5714 | // Make a PLT entry for a local STT_GNU_IFUNC symbol. |
612a8d3d | 5715 | |
e5d5f5ed AM |
5716 | template<int size, bool big_endian> |
5717 | void | |
5718 | Target_powerpc<size, big_endian>::make_local_ifunc_plt_entry( | |
40b469d7 | 5719 | Symbol_table* symtab, |
e5d5f5ed | 5720 | Layout* layout, |
ec661b9d AM |
5721 | Sized_relobj_file<size, big_endian>* relobj, |
5722 | unsigned int r_sym) | |
e5d5f5ed AM |
5723 | { |
5724 | if (this->iplt_ == NULL) | |
40b469d7 | 5725 | this->make_iplt_section(symtab, layout); |
03e25981 | 5726 | this->iplt_->add_local_ifunc_entry(relobj, r_sym); |
42cacb20 DE |
5727 | } |
5728 | ||
0e70b911 CC |
5729 | // Return the number of entries in the PLT. |
5730 | ||
5731 | template<int size, bool big_endian> | |
5732 | unsigned int | |
5733 | Target_powerpc<size, big_endian>::plt_entry_count() const | |
5734 | { | |
5735 | if (this->plt_ == NULL) | |
5736 | return 0; | |
b3ccdeb5 | 5737 | return this->plt_->entry_count(); |
0e70b911 CC |
5738 | } |
5739 | ||
dd93cd0a | 5740 | // Create a GOT entry for local dynamic __tls_get_addr calls. |
42cacb20 DE |
5741 | |
5742 | template<int size, bool big_endian> | |
5743 | unsigned int | |
dd93cd0a | 5744 | Target_powerpc<size, big_endian>::tlsld_got_offset( |
6fa2a40b CC |
5745 | Symbol_table* symtab, |
5746 | Layout* layout, | |
5747 | Sized_relobj_file<size, big_endian>* object) | |
42cacb20 | 5748 | { |
dd93cd0a | 5749 | if (this->tlsld_got_offset_ == -1U) |
42cacb20 DE |
5750 | { |
5751 | gold_assert(symtab != NULL && layout != NULL && object != NULL); | |
5752 | Reloc_section* rela_dyn = this->rela_dyn_section(layout); | |
dd93cd0a AM |
5753 | Output_data_got_powerpc<size, big_endian>* got |
5754 | = this->got_section(symtab, layout); | |
5755 | unsigned int got_offset = got->add_constant_pair(0, 0); | |
42cacb20 DE |
5756 | rela_dyn->add_local(object, 0, elfcpp::R_POWERPC_DTPMOD, got, |
5757 | got_offset, 0); | |
dd93cd0a | 5758 | this->tlsld_got_offset_ = got_offset; |
42cacb20 | 5759 | } |
dd93cd0a | 5760 | return this->tlsld_got_offset_; |
42cacb20 DE |
5761 | } |
5762 | ||
95a2c8d6 RS |
5763 | // Get the Reference_flags for a particular relocation. |
5764 | ||
5765 | template<int size, bool big_endian> | |
5766 | int | |
88b8e639 AM |
5767 | Target_powerpc<size, big_endian>::Scan::get_reference_flags( |
5768 | unsigned int r_type, | |
5769 | const Target_powerpc* target) | |
95a2c8d6 | 5770 | { |
88b8e639 AM |
5771 | int ref = 0; |
5772 | ||
95a2c8d6 RS |
5773 | switch (r_type) |
5774 | { | |
5775 | case elfcpp::R_POWERPC_NONE: | |
5776 | case elfcpp::R_POWERPC_GNU_VTINHERIT: | |
5777 | case elfcpp::R_POWERPC_GNU_VTENTRY: | |
5778 | case elfcpp::R_PPC64_TOC: | |
5779 | // No symbol reference. | |
88b8e639 | 5780 | break; |
95a2c8d6 | 5781 | |
dd93cd0a AM |
5782 | case elfcpp::R_PPC64_ADDR64: |
5783 | case elfcpp::R_PPC64_UADDR64: | |
5784 | case elfcpp::R_POWERPC_ADDR32: | |
5785 | case elfcpp::R_POWERPC_UADDR32: | |
95a2c8d6 | 5786 | case elfcpp::R_POWERPC_ADDR16: |
dd93cd0a | 5787 | case elfcpp::R_POWERPC_UADDR16: |
95a2c8d6 RS |
5788 | case elfcpp::R_POWERPC_ADDR16_LO: |
5789 | case elfcpp::R_POWERPC_ADDR16_HI: | |
5790 | case elfcpp::R_POWERPC_ADDR16_HA: | |
88b8e639 AM |
5791 | ref = Symbol::ABSOLUTE_REF; |
5792 | break; | |
95a2c8d6 | 5793 | |
dd93cd0a AM |
5794 | case elfcpp::R_POWERPC_ADDR24: |
5795 | case elfcpp::R_POWERPC_ADDR14: | |
5796 | case elfcpp::R_POWERPC_ADDR14_BRTAKEN: | |
5797 | case elfcpp::R_POWERPC_ADDR14_BRNTAKEN: | |
88b8e639 AM |
5798 | ref = Symbol::FUNCTION_CALL | Symbol::ABSOLUTE_REF; |
5799 | break; | |
dd93cd0a | 5800 | |
e5d5f5ed | 5801 | case elfcpp::R_PPC64_REL64: |
dd93cd0a | 5802 | case elfcpp::R_POWERPC_REL32: |
95a2c8d6 | 5803 | case elfcpp::R_PPC_LOCAL24PC: |
6ce78956 AM |
5804 | case elfcpp::R_POWERPC_REL16: |
5805 | case elfcpp::R_POWERPC_REL16_LO: | |
5806 | case elfcpp::R_POWERPC_REL16_HI: | |
5807 | case elfcpp::R_POWERPC_REL16_HA: | |
88b8e639 AM |
5808 | ref = Symbol::RELATIVE_REF; |
5809 | break; | |
95a2c8d6 | 5810 | |
dd93cd0a | 5811 | case elfcpp::R_POWERPC_REL24: |
95a2c8d6 | 5812 | case elfcpp::R_PPC_PLTREL24: |
dd93cd0a AM |
5813 | case elfcpp::R_POWERPC_REL14: |
5814 | case elfcpp::R_POWERPC_REL14_BRTAKEN: | |
5815 | case elfcpp::R_POWERPC_REL14_BRNTAKEN: | |
88b8e639 AM |
5816 | ref = Symbol::FUNCTION_CALL | Symbol::RELATIVE_REF; |
5817 | break; | |
95a2c8d6 RS |
5818 | |
5819 | case elfcpp::R_POWERPC_GOT16: | |
5820 | case elfcpp::R_POWERPC_GOT16_LO: | |
5821 | case elfcpp::R_POWERPC_GOT16_HI: | |
5822 | case elfcpp::R_POWERPC_GOT16_HA: | |
e5d5f5ed AM |
5823 | case elfcpp::R_PPC64_GOT16_DS: |
5824 | case elfcpp::R_PPC64_GOT16_LO_DS: | |
95a2c8d6 RS |
5825 | case elfcpp::R_PPC64_TOC16: |
5826 | case elfcpp::R_PPC64_TOC16_LO: | |
5827 | case elfcpp::R_PPC64_TOC16_HI: | |
5828 | case elfcpp::R_PPC64_TOC16_HA: | |
5829 | case elfcpp::R_PPC64_TOC16_DS: | |
5830 | case elfcpp::R_PPC64_TOC16_LO_DS: | |
32d849b3 | 5831 | ref = Symbol::RELATIVE_REF; |
88b8e639 | 5832 | break; |
95a2c8d6 RS |
5833 | |
5834 | case elfcpp::R_POWERPC_GOT_TPREL16: | |
5835 | case elfcpp::R_POWERPC_TLS: | |
88b8e639 AM |
5836 | ref = Symbol::TLS_REF; |
5837 | break; | |
95a2c8d6 RS |
5838 | |
5839 | case elfcpp::R_POWERPC_COPY: | |
5840 | case elfcpp::R_POWERPC_GLOB_DAT: | |
5841 | case elfcpp::R_POWERPC_JMP_SLOT: | |
5842 | case elfcpp::R_POWERPC_RELATIVE: | |
5843 | case elfcpp::R_POWERPC_DTPMOD: | |
5844 | default: | |
5845 | // Not expected. We will give an error later. | |
88b8e639 | 5846 | break; |
95a2c8d6 | 5847 | } |
88b8e639 AM |
5848 | |
5849 | if (size == 64 && target->abiversion() < 2) | |
5850 | ref |= Symbol::FUNC_DESC_ABI; | |
5851 | return ref; | |
95a2c8d6 RS |
5852 | } |
5853 | ||
42cacb20 DE |
5854 | // Report an unsupported relocation against a local symbol. |
5855 | ||
5856 | template<int size, bool big_endian> | |
5857 | void | |
5858 | Target_powerpc<size, big_endian>::Scan::unsupported_reloc_local( | |
d83ce4e3 AM |
5859 | Sized_relobj_file<size, big_endian>* object, |
5860 | unsigned int r_type) | |
42cacb20 DE |
5861 | { |
5862 | gold_error(_("%s: unsupported reloc %u against local symbol"), | |
5863 | object->name().c_str(), r_type); | |
5864 | } | |
5865 | ||
5866 | // We are about to emit a dynamic relocation of type R_TYPE. If the | |
5867 | // dynamic linker does not support it, issue an error. | |
5868 | ||
5869 | template<int size, bool big_endian> | |
5870 | void | |
5871 | Target_powerpc<size, big_endian>::Scan::check_non_pic(Relobj* object, | |
5872 | unsigned int r_type) | |
5873 | { | |
5874 | gold_assert(r_type != elfcpp::R_POWERPC_NONE); | |
5875 | ||
5876 | // These are the relocation types supported by glibc for both 32-bit | |
5877 | // and 64-bit powerpc. | |
5878 | switch (r_type) | |
5879 | { | |
3ea0a085 | 5880 | case elfcpp::R_POWERPC_NONE: |
42cacb20 DE |
5881 | case elfcpp::R_POWERPC_RELATIVE: |
5882 | case elfcpp::R_POWERPC_GLOB_DAT: | |
5883 | case elfcpp::R_POWERPC_DTPMOD: | |
5884 | case elfcpp::R_POWERPC_DTPREL: | |
5885 | case elfcpp::R_POWERPC_TPREL: | |
5886 | case elfcpp::R_POWERPC_JMP_SLOT: | |
5887 | case elfcpp::R_POWERPC_COPY: | |
3ea0a085 | 5888 | case elfcpp::R_POWERPC_IRELATIVE: |
42cacb20 | 5889 | case elfcpp::R_POWERPC_ADDR32: |
3ea0a085 | 5890 | case elfcpp::R_POWERPC_UADDR32: |
42cacb20 | 5891 | case elfcpp::R_POWERPC_ADDR24: |
3ea0a085 AM |
5892 | case elfcpp::R_POWERPC_ADDR16: |
5893 | case elfcpp::R_POWERPC_UADDR16: | |
5894 | case elfcpp::R_POWERPC_ADDR16_LO: | |
5895 | case elfcpp::R_POWERPC_ADDR16_HI: | |
5896 | case elfcpp::R_POWERPC_ADDR16_HA: | |
5897 | case elfcpp::R_POWERPC_ADDR14: | |
5898 | case elfcpp::R_POWERPC_ADDR14_BRTAKEN: | |
5899 | case elfcpp::R_POWERPC_ADDR14_BRNTAKEN: | |
5900 | case elfcpp::R_POWERPC_REL32: | |
42cacb20 | 5901 | case elfcpp::R_POWERPC_REL24: |
3ea0a085 AM |
5902 | case elfcpp::R_POWERPC_TPREL16: |
5903 | case elfcpp::R_POWERPC_TPREL16_LO: | |
5904 | case elfcpp::R_POWERPC_TPREL16_HI: | |
5905 | case elfcpp::R_POWERPC_TPREL16_HA: | |
42cacb20 DE |
5906 | return; |
5907 | ||
5908 | default: | |
5909 | break; | |
5910 | } | |
5911 | ||
5912 | if (size == 64) | |
5913 | { | |
5914 | switch (r_type) | |
5915 | { | |
5916 | // These are the relocation types supported only on 64-bit. | |
5917 | case elfcpp::R_PPC64_ADDR64: | |
42cacb20 | 5918 | case elfcpp::R_PPC64_UADDR64: |
3ea0a085 | 5919 | case elfcpp::R_PPC64_JMP_IREL: |
42cacb20 | 5920 | case elfcpp::R_PPC64_ADDR16_DS: |
3ea0a085 | 5921 | case elfcpp::R_PPC64_ADDR16_LO_DS: |
f9c6b907 AM |
5922 | case elfcpp::R_PPC64_ADDR16_HIGH: |
5923 | case elfcpp::R_PPC64_ADDR16_HIGHA: | |
42cacb20 DE |
5924 | case elfcpp::R_PPC64_ADDR16_HIGHER: |
5925 | case elfcpp::R_PPC64_ADDR16_HIGHEST: | |
5926 | case elfcpp::R_PPC64_ADDR16_HIGHERA: | |
5927 | case elfcpp::R_PPC64_ADDR16_HIGHESTA: | |
42cacb20 | 5928 | case elfcpp::R_PPC64_REL64: |
3ea0a085 AM |
5929 | case elfcpp::R_POWERPC_ADDR30: |
5930 | case elfcpp::R_PPC64_TPREL16_DS: | |
5931 | case elfcpp::R_PPC64_TPREL16_LO_DS: | |
f9c6b907 AM |
5932 | case elfcpp::R_PPC64_TPREL16_HIGH: |
5933 | case elfcpp::R_PPC64_TPREL16_HIGHA: | |
3ea0a085 AM |
5934 | case elfcpp::R_PPC64_TPREL16_HIGHER: |
5935 | case elfcpp::R_PPC64_TPREL16_HIGHEST: | |
5936 | case elfcpp::R_PPC64_TPREL16_HIGHERA: | |
5937 | case elfcpp::R_PPC64_TPREL16_HIGHESTA: | |
42cacb20 DE |
5938 | return; |
5939 | ||
5940 | default: | |
5941 | break; | |
5942 | } | |
5943 | } | |
5944 | else | |
5945 | { | |
5946 | switch (r_type) | |
5947 | { | |
5948 | // These are the relocation types supported only on 32-bit. | |
3ea0a085 AM |
5949 | // ??? glibc ld.so doesn't need to support these. |
5950 | case elfcpp::R_POWERPC_DTPREL16: | |
5951 | case elfcpp::R_POWERPC_DTPREL16_LO: | |
5952 | case elfcpp::R_POWERPC_DTPREL16_HI: | |
5953 | case elfcpp::R_POWERPC_DTPREL16_HA: | |
5954 | return; | |
42cacb20 DE |
5955 | |
5956 | default: | |
5957 | break; | |
5958 | } | |
5959 | } | |
5960 | ||
5961 | // This prevents us from issuing more than one error per reloc | |
5962 | // section. But we can still wind up issuing more than one | |
5963 | // error per object file. | |
5964 | if (this->issued_non_pic_error_) | |
5965 | return; | |
33aea2fd | 5966 | gold_assert(parameters->options().output_is_position_independent()); |
42cacb20 DE |
5967 | object->error(_("requires unsupported dynamic reloc; " |
5968 | "recompile with -fPIC")); | |
5969 | this->issued_non_pic_error_ = true; | |
5970 | return; | |
5971 | } | |
5972 | ||
e5d5f5ed AM |
5973 | // Return whether we need to make a PLT entry for a relocation of the |
5974 | // given type against a STT_GNU_IFUNC symbol. | |
5975 | ||
5976 | template<int size, bool big_endian> | |
5977 | bool | |
5978 | Target_powerpc<size, big_endian>::Scan::reloc_needs_plt_for_ifunc( | |
9055360d | 5979 | Target_powerpc<size, big_endian>* target, |
e5d5f5ed | 5980 | Sized_relobj_file<size, big_endian>* object, |
b3ccdeb5 AM |
5981 | unsigned int r_type, |
5982 | bool report_err) | |
e5d5f5ed | 5983 | { |
c9824451 AM |
5984 | // In non-pic code any reference will resolve to the plt call stub |
5985 | // for the ifunc symbol. | |
9055360d AM |
5986 | if ((size == 32 || target->abiversion() >= 2) |
5987 | && !parameters->options().output_is_position_independent()) | |
c9824451 AM |
5988 | return true; |
5989 | ||
e5d5f5ed AM |
5990 | switch (r_type) |
5991 | { | |
b3ccdeb5 | 5992 | // Word size refs from data sections are OK, but don't need a PLT entry. |
e5d5f5ed AM |
5993 | case elfcpp::R_POWERPC_ADDR32: |
5994 | case elfcpp::R_POWERPC_UADDR32: | |
5995 | if (size == 32) | |
b3ccdeb5 | 5996 | return false; |
e5d5f5ed AM |
5997 | break; |
5998 | ||
5999 | case elfcpp::R_PPC64_ADDR64: | |
6000 | case elfcpp::R_PPC64_UADDR64: | |
6001 | if (size == 64) | |
b3ccdeb5 | 6002 | return false; |
e5d5f5ed AM |
6003 | break; |
6004 | ||
b3ccdeb5 | 6005 | // GOT refs are good, but also don't need a PLT entry. |
e5d5f5ed AM |
6006 | case elfcpp::R_POWERPC_GOT16: |
6007 | case elfcpp::R_POWERPC_GOT16_LO: | |
6008 | case elfcpp::R_POWERPC_GOT16_HI: | |
6009 | case elfcpp::R_POWERPC_GOT16_HA: | |
6010 | case elfcpp::R_PPC64_GOT16_DS: | |
6011 | case elfcpp::R_PPC64_GOT16_LO_DS: | |
b3ccdeb5 | 6012 | return false; |
e5d5f5ed | 6013 | |
b3ccdeb5 | 6014 | // Function calls are good, and these do need a PLT entry. |
e5d5f5ed AM |
6015 | case elfcpp::R_POWERPC_ADDR24: |
6016 | case elfcpp::R_POWERPC_ADDR14: | |
6017 | case elfcpp::R_POWERPC_ADDR14_BRTAKEN: | |
6018 | case elfcpp::R_POWERPC_ADDR14_BRNTAKEN: | |
6019 | case elfcpp::R_POWERPC_REL24: | |
6020 | case elfcpp::R_PPC_PLTREL24: | |
6021 | case elfcpp::R_POWERPC_REL14: | |
6022 | case elfcpp::R_POWERPC_REL14_BRTAKEN: | |
6023 | case elfcpp::R_POWERPC_REL14_BRNTAKEN: | |
6024 | return true; | |
6025 | ||
6026 | default: | |
6027 | break; | |
6028 | } | |
6029 | ||
6030 | // Anything else is a problem. | |
6031 | // If we are building a static executable, the libc startup function | |
6032 | // responsible for applying indirect function relocations is going | |
6033 | // to complain about the reloc type. | |
6034 | // If we are building a dynamic executable, we will have a text | |
6035 | // relocation. The dynamic loader will set the text segment | |
6036 | // writable and non-executable to apply text relocations. So we'll | |
6037 | // segfault when trying to run the indirection function to resolve | |
6038 | // the reloc. | |
b3ccdeb5 AM |
6039 | if (report_err) |
6040 | gold_error(_("%s: unsupported reloc %u for IFUNC symbol"), | |
e5d5f5ed AM |
6041 | object->name().c_str(), r_type); |
6042 | return false; | |
6043 | } | |
6044 | ||
5edad15d AM |
6045 | // Return TRUE iff INSN is one we expect on a _LO variety toc/got |
6046 | // reloc. | |
6047 | ||
6048 | static bool | |
6049 | ok_lo_toc_insn(uint32_t insn, unsigned int r_type) | |
6050 | { | |
6051 | return ((insn & (0x3f << 26)) == 12u << 26 /* addic */ | |
6052 | || (insn & (0x3f << 26)) == 14u << 26 /* addi */ | |
6053 | || (insn & (0x3f << 26)) == 32u << 26 /* lwz */ | |
6054 | || (insn & (0x3f << 26)) == 34u << 26 /* lbz */ | |
6055 | || (insn & (0x3f << 26)) == 36u << 26 /* stw */ | |
6056 | || (insn & (0x3f << 26)) == 38u << 26 /* stb */ | |
6057 | || (insn & (0x3f << 26)) == 40u << 26 /* lhz */ | |
6058 | || (insn & (0x3f << 26)) == 42u << 26 /* lha */ | |
6059 | || (insn & (0x3f << 26)) == 44u << 26 /* sth */ | |
6060 | || (insn & (0x3f << 26)) == 46u << 26 /* lmw */ | |
6061 | || (insn & (0x3f << 26)) == 47u << 26 /* stmw */ | |
6062 | || (insn & (0x3f << 26)) == 48u << 26 /* lfs */ | |
6063 | || (insn & (0x3f << 26)) == 50u << 26 /* lfd */ | |
6064 | || (insn & (0x3f << 26)) == 52u << 26 /* stfs */ | |
6065 | || (insn & (0x3f << 26)) == 54u << 26 /* stfd */ | |
6066 | || (insn & (0x3f << 26)) == 56u << 26 /* lq,lfq */ | |
6067 | || ((insn & (0x3f << 26)) == 57u << 26 /* lxsd,lxssp,lfdp */ | |
6068 | /* Exclude lfqu by testing reloc. If relocs are ever | |
6069 | defined for the reduced D field in psq_lu then those | |
6070 | will need testing too. */ | |
6071 | && r_type != elfcpp::R_PPC64_TOC16_LO | |
6072 | && r_type != elfcpp::R_POWERPC_GOT16_LO) | |
6073 | || ((insn & (0x3f << 26)) == 58u << 26 /* ld,lwa */ | |
6074 | && (insn & 1) == 0) | |
6075 | || (insn & (0x3f << 26)) == 60u << 26 /* stfq */ | |
6076 | || ((insn & (0x3f << 26)) == 61u << 26 /* lxv,stx{v,sd,ssp},stfdp */ | |
6077 | /* Exclude stfqu. psq_stu as above for psq_lu. */ | |
6078 | && r_type != elfcpp::R_PPC64_TOC16_LO | |
6079 | && r_type != elfcpp::R_POWERPC_GOT16_LO) | |
6080 | || ((insn & (0x3f << 26)) == 62u << 26 /* std,stq */ | |
6081 | && (insn & 1) == 0)); | |
6082 | } | |
6083 | ||
42cacb20 DE |
6084 | // Scan a relocation for a local symbol. |
6085 | ||
6086 | template<int size, bool big_endian> | |
6087 | inline void | |
6088 | Target_powerpc<size, big_endian>::Scan::local( | |
d83ce4e3 AM |
6089 | Symbol_table* symtab, |
6090 | Layout* layout, | |
6091 | Target_powerpc<size, big_endian>* target, | |
6092 | Sized_relobj_file<size, big_endian>* object, | |
6093 | unsigned int data_shndx, | |
6094 | Output_section* output_section, | |
6095 | const elfcpp::Rela<size, big_endian>& reloc, | |
6096 | unsigned int r_type, | |
e5d5f5ed | 6097 | const elfcpp::Sym<size, big_endian>& lsym, |
bfdfa4cd | 6098 | bool is_discarded) |
42cacb20 | 6099 | { |
e3deeb9c AM |
6100 | this->maybe_skip_tls_get_addr_call(r_type, NULL); |
6101 | ||
6102 | if ((size == 64 && r_type == elfcpp::R_PPC64_TLSGD) | |
6103 | || (size == 32 && r_type == elfcpp::R_PPC_TLSGD)) | |
6104 | { | |
6105 | this->expect_tls_get_addr_call(); | |
6106 | const tls::Tls_optimization tls_type = target->optimize_tls_gd(true); | |
6107 | if (tls_type != tls::TLSOPT_NONE) | |
6108 | this->skip_next_tls_get_addr_call(); | |
6109 | } | |
6110 | else if ((size == 64 && r_type == elfcpp::R_PPC64_TLSLD) | |
6111 | || (size == 32 && r_type == elfcpp::R_PPC_TLSLD)) | |
6112 | { | |
6113 | this->expect_tls_get_addr_call(); | |
6114 | const tls::Tls_optimization tls_type = target->optimize_tls_ld(); | |
6115 | if (tls_type != tls::TLSOPT_NONE) | |
6116 | this->skip_next_tls_get_addr_call(); | |
6117 | } | |
6118 | ||
dd93cd0a AM |
6119 | Powerpc_relobj<size, big_endian>* ppc_object |
6120 | = static_cast<Powerpc_relobj<size, big_endian>*>(object); | |
6121 | ||
bfdfa4cd AM |
6122 | if (is_discarded) |
6123 | { | |
6124 | if (size == 64 | |
6125 | && data_shndx == ppc_object->opd_shndx() | |
6126 | && r_type == elfcpp::R_PPC64_ADDR64) | |
6127 | ppc_object->set_opd_discard(reloc.get_r_offset()); | |
6128 | return; | |
6129 | } | |
6130 | ||
e5d5f5ed AM |
6131 | // A local STT_GNU_IFUNC symbol may require a PLT entry. |
6132 | bool is_ifunc = lsym.get_st_type() == elfcpp::STT_GNU_IFUNC; | |
9055360d | 6133 | if (is_ifunc && this->reloc_needs_plt_for_ifunc(target, object, r_type, true)) |
40b469d7 | 6134 | { |
ec661b9d AM |
6135 | unsigned int r_sym = elfcpp::elf_r_sym<size>(reloc.get_r_info()); |
6136 | target->push_branch(ppc_object, data_shndx, reloc.get_r_offset(), | |
6137 | r_type, r_sym, reloc.get_r_addend()); | |
6138 | target->make_local_ifunc_plt_entry(symtab, layout, object, r_sym); | |
40b469d7 | 6139 | } |
e5d5f5ed | 6140 | |
42cacb20 DE |
6141 | switch (r_type) |
6142 | { | |
6143 | case elfcpp::R_POWERPC_NONE: | |
6144 | case elfcpp::R_POWERPC_GNU_VTINHERIT: | |
6145 | case elfcpp::R_POWERPC_GNU_VTENTRY: | |
7404fe1b | 6146 | case elfcpp::R_POWERPC_TLS: |
549dba71 | 6147 | case elfcpp::R_PPC64_ENTRY: |
dd93cd0a AM |
6148 | break; |
6149 | ||
6150 | case elfcpp::R_PPC64_TOC: | |
6151 | { | |
6152 | Output_data_got_powerpc<size, big_endian>* got | |
6153 | = target->got_section(symtab, layout); | |
6154 | if (parameters->options().output_is_position_independent()) | |
6155 | { | |
bfdfa4cd AM |
6156 | Address off = reloc.get_r_offset(); |
6157 | if (size == 64 | |
9055360d | 6158 | && target->abiversion() < 2 |
bfdfa4cd AM |
6159 | && data_shndx == ppc_object->opd_shndx() |
6160 | && ppc_object->get_opd_discard(off - 8)) | |
6161 | break; | |
6162 | ||
dd93cd0a | 6163 | Reloc_section* rela_dyn = target->rela_dyn_section(layout); |
bfdfa4cd | 6164 | Powerpc_relobj<size, big_endian>* symobj = ppc_object; |
dd93cd0a AM |
6165 | rela_dyn->add_output_section_relative(got->output_section(), |
6166 | elfcpp::R_POWERPC_RELATIVE, | |
6167 | output_section, | |
bfdfa4cd AM |
6168 | object, data_shndx, off, |
6169 | symobj->toc_base_offset()); | |
dd93cd0a AM |
6170 | } |
6171 | } | |
42cacb20 DE |
6172 | break; |
6173 | ||
6174 | case elfcpp::R_PPC64_ADDR64: | |
dd93cd0a | 6175 | case elfcpp::R_PPC64_UADDR64: |
42cacb20 | 6176 | case elfcpp::R_POWERPC_ADDR32: |
dd93cd0a AM |
6177 | case elfcpp::R_POWERPC_UADDR32: |
6178 | case elfcpp::R_POWERPC_ADDR24: | |
c9269dff | 6179 | case elfcpp::R_POWERPC_ADDR16: |
42cacb20 | 6180 | case elfcpp::R_POWERPC_ADDR16_LO: |
c9269dff AM |
6181 | case elfcpp::R_POWERPC_ADDR16_HI: |
6182 | case elfcpp::R_POWERPC_ADDR16_HA: | |
dd93cd0a | 6183 | case elfcpp::R_POWERPC_UADDR16: |
f9c6b907 AM |
6184 | case elfcpp::R_PPC64_ADDR16_HIGH: |
6185 | case elfcpp::R_PPC64_ADDR16_HIGHA: | |
dd93cd0a AM |
6186 | case elfcpp::R_PPC64_ADDR16_HIGHER: |
6187 | case elfcpp::R_PPC64_ADDR16_HIGHERA: | |
6188 | case elfcpp::R_PPC64_ADDR16_HIGHEST: | |
6189 | case elfcpp::R_PPC64_ADDR16_HIGHESTA: | |
6190 | case elfcpp::R_PPC64_ADDR16_DS: | |
6191 | case elfcpp::R_PPC64_ADDR16_LO_DS: | |
6192 | case elfcpp::R_POWERPC_ADDR14: | |
6193 | case elfcpp::R_POWERPC_ADDR14_BRTAKEN: | |
6194 | case elfcpp::R_POWERPC_ADDR14_BRNTAKEN: | |
42cacb20 DE |
6195 | // If building a shared library (or a position-independent |
6196 | // executable), we need to create a dynamic relocation for | |
6197 | // this location. | |
c9824451 | 6198 | if (parameters->options().output_is_position_independent() |
9055360d | 6199 | || (size == 64 && is_ifunc && target->abiversion() < 2)) |
2e702c99 | 6200 | { |
b3ccdeb5 AM |
6201 | Reloc_section* rela_dyn = target->rela_dyn_section(symtab, layout, |
6202 | is_ifunc); | |
1f98a074 | 6203 | unsigned int r_sym = elfcpp::elf_r_sym<size>(reloc.get_r_info()); |
dd93cd0a AM |
6204 | if ((size == 32 && r_type == elfcpp::R_POWERPC_ADDR32) |
6205 | || (size == 64 && r_type == elfcpp::R_PPC64_ADDR64)) | |
2e702c99 | 6206 | { |
b3ccdeb5 AM |
6207 | unsigned int dynrel = (is_ifunc ? elfcpp::R_POWERPC_IRELATIVE |
6208 | : elfcpp::R_POWERPC_RELATIVE); | |
e5d5f5ed | 6209 | rela_dyn->add_local_relative(object, r_sym, dynrel, |
dd93cd0a AM |
6210 | output_section, data_shndx, |
6211 | reloc.get_r_offset(), | |
c9824451 | 6212 | reloc.get_r_addend(), false); |
2e702c99 | 6213 | } |
1f98a074 | 6214 | else if (lsym.get_st_type() != elfcpp::STT_SECTION) |
2e702c99 | 6215 | { |
dd93cd0a | 6216 | check_non_pic(object, r_type); |
dd93cd0a AM |
6217 | rela_dyn->add_local(object, r_sym, r_type, output_section, |
6218 | data_shndx, reloc.get_r_offset(), | |
6219 | reloc.get_r_addend()); | |
2e702c99 | 6220 | } |
1f98a074 AM |
6221 | else |
6222 | { | |
6223 | gold_assert(lsym.get_st_value() == 0); | |
6224 | unsigned int shndx = lsym.get_st_shndx(); | |
6225 | bool is_ordinary; | |
6226 | shndx = object->adjust_sym_shndx(r_sym, shndx, | |
6227 | &is_ordinary); | |
6228 | if (!is_ordinary) | |
6229 | object->error(_("section symbol %u has bad shndx %u"), | |
6230 | r_sym, shndx); | |
6231 | else | |
6232 | rela_dyn->add_local_section(object, shndx, r_type, | |
6233 | output_section, data_shndx, | |
6234 | reloc.get_r_offset()); | |
6235 | } | |
2e702c99 | 6236 | } |
42cacb20 DE |
6237 | break; |
6238 | ||
6239 | case elfcpp::R_POWERPC_REL24: | |
c9824451 | 6240 | case elfcpp::R_PPC_PLTREL24: |
42cacb20 | 6241 | case elfcpp::R_PPC_LOCAL24PC: |
ec661b9d AM |
6242 | case elfcpp::R_POWERPC_REL14: |
6243 | case elfcpp::R_POWERPC_REL14_BRTAKEN: | |
6244 | case elfcpp::R_POWERPC_REL14_BRNTAKEN: | |
b3ccdeb5 | 6245 | if (!is_ifunc) |
0e123f69 AM |
6246 | { |
6247 | unsigned int r_sym = elfcpp::elf_r_sym<size>(reloc.get_r_info()); | |
6248 | target->push_branch(ppc_object, data_shndx, reloc.get_r_offset(), | |
6249 | r_type, r_sym, reloc.get_r_addend()); | |
6250 | } | |
ec661b9d AM |
6251 | break; |
6252 | ||
7e57d19e AM |
6253 | case elfcpp::R_PPC64_TOCSAVE: |
6254 | // R_PPC64_TOCSAVE follows a call instruction to indicate the | |
6255 | // caller has already saved r2 and thus a plt call stub need not | |
6256 | // save r2. | |
6257 | if (size == 64 | |
6258 | && target->mark_pltcall(ppc_object, data_shndx, | |
6259 | reloc.get_r_offset() - 4, symtab)) | |
6260 | { | |
6261 | unsigned int r_sym = elfcpp::elf_r_sym<size>(reloc.get_r_info()); | |
6262 | unsigned int shndx = lsym.get_st_shndx(); | |
6263 | bool is_ordinary; | |
6264 | shndx = object->adjust_sym_shndx(r_sym, shndx, &is_ordinary); | |
6265 | if (!is_ordinary) | |
6266 | object->error(_("tocsave symbol %u has bad shndx %u"), | |
6267 | r_sym, shndx); | |
6268 | else | |
6269 | target->add_tocsave(ppc_object, shndx, | |
6270 | lsym.get_st_value() + reloc.get_r_addend()); | |
6271 | } | |
6272 | break; | |
6273 | ||
ec661b9d AM |
6274 | case elfcpp::R_PPC64_REL64: |
6275 | case elfcpp::R_POWERPC_REL32: | |
dd93cd0a | 6276 | case elfcpp::R_POWERPC_REL16: |
6ce78956 | 6277 | case elfcpp::R_POWERPC_REL16_LO: |
dd93cd0a | 6278 | case elfcpp::R_POWERPC_REL16_HI: |
6ce78956 | 6279 | case elfcpp::R_POWERPC_REL16_HA: |
a680de9a | 6280 | case elfcpp::R_POWERPC_REL16DX_HA: |
dd93cd0a | 6281 | case elfcpp::R_POWERPC_SECTOFF: |
dd93cd0a | 6282 | case elfcpp::R_POWERPC_SECTOFF_LO: |
dd93cd0a | 6283 | case elfcpp::R_POWERPC_SECTOFF_HI: |
dd93cd0a | 6284 | case elfcpp::R_POWERPC_SECTOFF_HA: |
f9c6b907 AM |
6285 | case elfcpp::R_PPC64_SECTOFF_DS: |
6286 | case elfcpp::R_PPC64_SECTOFF_LO_DS: | |
6287 | case elfcpp::R_POWERPC_TPREL16: | |
6288 | case elfcpp::R_POWERPC_TPREL16_LO: | |
6289 | case elfcpp::R_POWERPC_TPREL16_HI: | |
dd93cd0a | 6290 | case elfcpp::R_POWERPC_TPREL16_HA: |
f9c6b907 AM |
6291 | case elfcpp::R_PPC64_TPREL16_DS: |
6292 | case elfcpp::R_PPC64_TPREL16_LO_DS: | |
6293 | case elfcpp::R_PPC64_TPREL16_HIGH: | |
6294 | case elfcpp::R_PPC64_TPREL16_HIGHA: | |
dd93cd0a | 6295 | case elfcpp::R_PPC64_TPREL16_HIGHER: |
dd93cd0a | 6296 | case elfcpp::R_PPC64_TPREL16_HIGHERA: |
dd93cd0a | 6297 | case elfcpp::R_PPC64_TPREL16_HIGHEST: |
dd93cd0a | 6298 | case elfcpp::R_PPC64_TPREL16_HIGHESTA: |
f9c6b907 AM |
6299 | case elfcpp::R_POWERPC_DTPREL16: |
6300 | case elfcpp::R_POWERPC_DTPREL16_LO: | |
6301 | case elfcpp::R_POWERPC_DTPREL16_HI: | |
6302 | case elfcpp::R_POWERPC_DTPREL16_HA: | |
dd93cd0a AM |
6303 | case elfcpp::R_PPC64_DTPREL16_DS: |
6304 | case elfcpp::R_PPC64_DTPREL16_LO_DS: | |
f9c6b907 AM |
6305 | case elfcpp::R_PPC64_DTPREL16_HIGH: |
6306 | case elfcpp::R_PPC64_DTPREL16_HIGHA: | |
6307 | case elfcpp::R_PPC64_DTPREL16_HIGHER: | |
6308 | case elfcpp::R_PPC64_DTPREL16_HIGHERA: | |
6309 | case elfcpp::R_PPC64_DTPREL16_HIGHEST: | |
6310 | case elfcpp::R_PPC64_DTPREL16_HIGHESTA: | |
dd93cd0a AM |
6311 | case elfcpp::R_PPC64_TLSGD: |
6312 | case elfcpp::R_PPC64_TLSLD: | |
45965137 | 6313 | case elfcpp::R_PPC64_ADDR64_LOCAL: |
42cacb20 DE |
6314 | break; |
6315 | ||
6316 | case elfcpp::R_POWERPC_GOT16: | |
6317 | case elfcpp::R_POWERPC_GOT16_LO: | |
6318 | case elfcpp::R_POWERPC_GOT16_HI: | |
6319 | case elfcpp::R_POWERPC_GOT16_HA: | |
dd93cd0a AM |
6320 | case elfcpp::R_PPC64_GOT16_DS: |
6321 | case elfcpp::R_PPC64_GOT16_LO_DS: | |
42cacb20 | 6322 | { |
c9269dff | 6323 | // The symbol requires a GOT entry. |
dd93cd0a AM |
6324 | Output_data_got_powerpc<size, big_endian>* got |
6325 | = target->got_section(symtab, layout); | |
6326 | unsigned int r_sym = elfcpp::elf_r_sym<size>(reloc.get_r_info()); | |
42cacb20 | 6327 | |
e5d5f5ed | 6328 | if (!parameters->options().output_is_position_independent()) |
42cacb20 | 6329 | { |
b01a4b04 AM |
6330 | if (is_ifunc |
6331 | && (size == 32 || target->abiversion() >= 2)) | |
e5d5f5ed AM |
6332 | got->add_local_plt(object, r_sym, GOT_TYPE_STANDARD); |
6333 | else | |
6334 | got->add_local(object, r_sym, GOT_TYPE_STANDARD); | |
6335 | } | |
6336 | else if (!object->local_has_got_offset(r_sym, GOT_TYPE_STANDARD)) | |
6337 | { | |
6338 | // If we are generating a shared object or a pie, this | |
6339 | // symbol's GOT entry will be set by a dynamic relocation. | |
6340 | unsigned int off; | |
6341 | off = got->add_constant(0); | |
6342 | object->set_local_got_offset(r_sym, GOT_TYPE_STANDARD, off); | |
42cacb20 | 6343 | |
b3ccdeb5 AM |
6344 | Reloc_section* rela_dyn = target->rela_dyn_section(symtab, layout, |
6345 | is_ifunc); | |
6346 | unsigned int dynrel = (is_ifunc ? elfcpp::R_POWERPC_IRELATIVE | |
6347 | : elfcpp::R_POWERPC_RELATIVE); | |
e5d5f5ed | 6348 | rela_dyn->add_local_relative(object, r_sym, dynrel, |
c9824451 | 6349 | got, off, 0, false); |
2e702c99 | 6350 | } |
42cacb20 DE |
6351 | } |
6352 | break; | |
6353 | ||
cf43a2fe AM |
6354 | case elfcpp::R_PPC64_TOC16: |
6355 | case elfcpp::R_PPC64_TOC16_LO: | |
6356 | case elfcpp::R_PPC64_TOC16_HI: | |
6357 | case elfcpp::R_PPC64_TOC16_HA: | |
6358 | case elfcpp::R_PPC64_TOC16_DS: | |
6359 | case elfcpp::R_PPC64_TOC16_LO_DS: | |
42cacb20 DE |
6360 | // We need a GOT section. |
6361 | target->got_section(symtab, layout); | |
6362 | break; | |
6363 | ||
dd93cd0a AM |
6364 | case elfcpp::R_POWERPC_GOT_TLSGD16: |
6365 | case elfcpp::R_POWERPC_GOT_TLSGD16_LO: | |
6366 | case elfcpp::R_POWERPC_GOT_TLSGD16_HI: | |
6367 | case elfcpp::R_POWERPC_GOT_TLSGD16_HA: | |
6368 | { | |
6369 | const tls::Tls_optimization tls_type = target->optimize_tls_gd(true); | |
6370 | if (tls_type == tls::TLSOPT_NONE) | |
6371 | { | |
6372 | Output_data_got_powerpc<size, big_endian>* got | |
6373 | = target->got_section(symtab, layout); | |
6374 | unsigned int r_sym = elfcpp::elf_r_sym<size>(reloc.get_r_info()); | |
bd73a62d AM |
6375 | Reloc_section* rela_dyn = target->rela_dyn_section(layout); |
6376 | got->add_local_tls_pair(object, r_sym, GOT_TYPE_TLSGD, | |
6377 | rela_dyn, elfcpp::R_POWERPC_DTPMOD); | |
dd93cd0a AM |
6378 | } |
6379 | else if (tls_type == tls::TLSOPT_TO_LE) | |
6380 | { | |
6381 | // no GOT relocs needed for Local Exec. | |
6382 | } | |
6383 | else | |
6384 | gold_unreachable(); | |
6385 | } | |
42cacb20 DE |
6386 | break; |
6387 | ||
dd93cd0a AM |
6388 | case elfcpp::R_POWERPC_GOT_TLSLD16: |
6389 | case elfcpp::R_POWERPC_GOT_TLSLD16_LO: | |
6390 | case elfcpp::R_POWERPC_GOT_TLSLD16_HI: | |
6391 | case elfcpp::R_POWERPC_GOT_TLSLD16_HA: | |
6392 | { | |
6393 | const tls::Tls_optimization tls_type = target->optimize_tls_ld(); | |
6394 | if (tls_type == tls::TLSOPT_NONE) | |
6395 | target->tlsld_got_offset(symtab, layout, object); | |
6396 | else if (tls_type == tls::TLSOPT_TO_LE) | |
6397 | { | |
6398 | // no GOT relocs needed for Local Exec. | |
7404fe1b AM |
6399 | if (parameters->options().emit_relocs()) |
6400 | { | |
6401 | Output_section* os = layout->tls_segment()->first_section(); | |
6402 | gold_assert(os != NULL); | |
6403 | os->set_needs_symtab_index(); | |
6404 | } | |
dd93cd0a AM |
6405 | } |
6406 | else | |
6407 | gold_unreachable(); | |
6408 | } | |
42cacb20 | 6409 | break; |
42cacb20 | 6410 | |
dd93cd0a AM |
6411 | case elfcpp::R_POWERPC_GOT_DTPREL16: |
6412 | case elfcpp::R_POWERPC_GOT_DTPREL16_LO: | |
6413 | case elfcpp::R_POWERPC_GOT_DTPREL16_HI: | |
6414 | case elfcpp::R_POWERPC_GOT_DTPREL16_HA: | |
6415 | { | |
6416 | Output_data_got_powerpc<size, big_endian>* got | |
6417 | = target->got_section(symtab, layout); | |
6418 | unsigned int r_sym = elfcpp::elf_r_sym<size>(reloc.get_r_info()); | |
bd73a62d | 6419 | got->add_local_tls(object, r_sym, GOT_TYPE_DTPREL); |
dd93cd0a AM |
6420 | } |
6421 | break; | |
42cacb20 | 6422 | |
dd93cd0a AM |
6423 | case elfcpp::R_POWERPC_GOT_TPREL16: |
6424 | case elfcpp::R_POWERPC_GOT_TPREL16_LO: | |
6425 | case elfcpp::R_POWERPC_GOT_TPREL16_HI: | |
6426 | case elfcpp::R_POWERPC_GOT_TPREL16_HA: | |
6427 | { | |
6428 | const tls::Tls_optimization tls_type = target->optimize_tls_ie(true); | |
6429 | if (tls_type == tls::TLSOPT_NONE) | |
6430 | { | |
dd93cd0a | 6431 | unsigned int r_sym = elfcpp::elf_r_sym<size>(reloc.get_r_info()); |
acc276d8 AM |
6432 | if (!object->local_has_got_offset(r_sym, GOT_TYPE_TPREL)) |
6433 | { | |
6434 | Output_data_got_powerpc<size, big_endian>* got | |
6435 | = target->got_section(symtab, layout); | |
6436 | unsigned int off = got->add_constant(0); | |
6437 | object->set_local_got_offset(r_sym, GOT_TYPE_TPREL, off); | |
6438 | ||
6439 | Reloc_section* rela_dyn = target->rela_dyn_section(layout); | |
6440 | rela_dyn->add_symbolless_local_addend(object, r_sym, | |
6441 | elfcpp::R_POWERPC_TPREL, | |
6442 | got, off, 0); | |
6443 | } | |
dd93cd0a AM |
6444 | } |
6445 | else if (tls_type == tls::TLSOPT_TO_LE) | |
6446 | { | |
6447 | // no GOT relocs needed for Local Exec. | |
6448 | } | |
6449 | else | |
6450 | gold_unreachable(); | |
6451 | } | |
6452 | break; | |
6453 | ||
6454 | default: | |
6455 | unsupported_reloc_local(object, r_type); | |
6456 | break; | |
6457 | } | |
d8f5a274 | 6458 | |
5edad15d AM |
6459 | if (size == 64 |
6460 | && parameters->options().toc_optimize()) | |
6461 | { | |
6462 | if (data_shndx == ppc_object->toc_shndx()) | |
6463 | { | |
6464 | bool ok = true; | |
6465 | if (r_type != elfcpp::R_PPC64_ADDR64 | |
6466 | || (is_ifunc && target->abiversion() < 2)) | |
6467 | ok = false; | |
6468 | else if (parameters->options().output_is_position_independent()) | |
6469 | { | |
6470 | if (is_ifunc) | |
6471 | ok = false; | |
6472 | else | |
6473 | { | |
6474 | unsigned int shndx = lsym.get_st_shndx(); | |
6475 | if (shndx >= elfcpp::SHN_LORESERVE | |
6476 | && shndx != elfcpp::SHN_XINDEX) | |
6477 | ok = false; | |
6478 | } | |
6479 | } | |
6480 | if (!ok) | |
6481 | ppc_object->set_no_toc_opt(reloc.get_r_offset()); | |
6482 | } | |
6483 | ||
6484 | enum {no_check, check_lo, check_ha} insn_check; | |
6485 | switch (r_type) | |
6486 | { | |
6487 | default: | |
6488 | insn_check = no_check; | |
6489 | break; | |
6490 | ||
6491 | case elfcpp::R_POWERPC_GOT_TLSLD16_HA: | |
6492 | case elfcpp::R_POWERPC_GOT_TLSGD16_HA: | |
6493 | case elfcpp::R_POWERPC_GOT_TPREL16_HA: | |
6494 | case elfcpp::R_POWERPC_GOT_DTPREL16_HA: | |
6495 | case elfcpp::R_POWERPC_GOT16_HA: | |
6496 | case elfcpp::R_PPC64_TOC16_HA: | |
6497 | insn_check = check_ha; | |
6498 | break; | |
6499 | ||
6500 | case elfcpp::R_POWERPC_GOT_TLSLD16_LO: | |
6501 | case elfcpp::R_POWERPC_GOT_TLSGD16_LO: | |
6502 | case elfcpp::R_POWERPC_GOT_TPREL16_LO: | |
6503 | case elfcpp::R_POWERPC_GOT_DTPREL16_LO: | |
6504 | case elfcpp::R_POWERPC_GOT16_LO: | |
6505 | case elfcpp::R_PPC64_GOT16_LO_DS: | |
6506 | case elfcpp::R_PPC64_TOC16_LO: | |
6507 | case elfcpp::R_PPC64_TOC16_LO_DS: | |
6508 | insn_check = check_lo; | |
6509 | break; | |
6510 | } | |
6511 | ||
6512 | section_size_type slen; | |
6513 | const unsigned char* view = NULL; | |
6514 | if (insn_check != no_check) | |
6515 | { | |
6516 | view = ppc_object->section_contents(data_shndx, &slen, false); | |
6517 | section_size_type off = | |
6518 | convert_to_section_size_type(reloc.get_r_offset()) & -4; | |
6519 | if (off < slen) | |
6520 | { | |
6521 | uint32_t insn = elfcpp::Swap<32, big_endian>::readval(view + off); | |
6522 | if (insn_check == check_lo | |
6523 | ? !ok_lo_toc_insn(insn, r_type) | |
6524 | : ((insn & ((0x3f << 26) | 0x1f << 16)) | |
6525 | != ((15u << 26) | (2 << 16)) /* addis rt,2,imm */)) | |
6526 | { | |
6527 | ppc_object->set_no_toc_opt(); | |
6528 | gold_warning(_("%s: toc optimization is not supported " | |
6529 | "for %#08x instruction"), | |
6530 | ppc_object->name().c_str(), insn); | |
6531 | } | |
6532 | } | |
6533 | } | |
6534 | ||
6535 | switch (r_type) | |
6536 | { | |
6537 | default: | |
6538 | break; | |
6539 | case elfcpp::R_PPC64_TOC16: | |
6540 | case elfcpp::R_PPC64_TOC16_LO: | |
6541 | case elfcpp::R_PPC64_TOC16_HI: | |
6542 | case elfcpp::R_PPC64_TOC16_HA: | |
6543 | case elfcpp::R_PPC64_TOC16_DS: | |
6544 | case elfcpp::R_PPC64_TOC16_LO_DS: | |
6545 | unsigned int shndx = lsym.get_st_shndx(); | |
6546 | unsigned int r_sym = elfcpp::elf_r_sym<size>(reloc.get_r_info()); | |
6547 | bool is_ordinary; | |
6548 | shndx = ppc_object->adjust_sym_shndx(r_sym, shndx, &is_ordinary); | |
6549 | if (is_ordinary && shndx == ppc_object->toc_shndx()) | |
6550 | { | |
6551 | Address dst_off = lsym.get_st_value() + reloc.get_r_offset(); | |
6552 | if (dst_off < ppc_object->section_size(shndx)) | |
6553 | { | |
6554 | bool ok = false; | |
6555 | if (r_type == elfcpp::R_PPC64_TOC16_HA) | |
6556 | ok = true; | |
6557 | else if (r_type == elfcpp::R_PPC64_TOC16_LO_DS) | |
6558 | { | |
6559 | // Need to check that the insn is a ld | |
6560 | if (!view) | |
6561 | view = ppc_object->section_contents(data_shndx, | |
6562 | &slen, | |
6563 | false); | |
6564 | section_size_type off = | |
6565 | (convert_to_section_size_type(reloc.get_r_offset()) | |
6566 | + (big_endian ? -2 : 3)); | |
6567 | if (off < slen | |
6568 | && (view[off] & (0x3f << 2)) == 58u << 2) | |
6569 | ok = true; | |
6570 | } | |
6571 | if (!ok) | |
6572 | ppc_object->set_no_toc_opt(dst_off); | |
6573 | } | |
6574 | } | |
6575 | break; | |
6576 | } | |
6577 | } | |
6578 | ||
f159cdb6 AM |
6579 | if (size == 32) |
6580 | { | |
6581 | switch (r_type) | |
6582 | { | |
6583 | case elfcpp::R_POWERPC_REL32: | |
6584 | if (ppc_object->got2_shndx() != 0 | |
6585 | && parameters->options().output_is_position_independent()) | |
6586 | { | |
6587 | unsigned int shndx = lsym.get_st_shndx(); | |
6588 | unsigned int r_sym = elfcpp::elf_r_sym<size>(reloc.get_r_info()); | |
6589 | bool is_ordinary; | |
6590 | shndx = ppc_object->adjust_sym_shndx(r_sym, shndx, &is_ordinary); | |
6591 | if (is_ordinary && shndx == ppc_object->got2_shndx() | |
6592 | && (ppc_object->section_flags(data_shndx) | |
6593 | & elfcpp::SHF_EXECINSTR) != 0) | |
6594 | gold_error(_("%s: unsupported -mbss-plt code"), | |
6595 | ppc_object->name().c_str()); | |
6596 | } | |
6597 | break; | |
6598 | default: | |
6599 | break; | |
6600 | } | |
6601 | } | |
6602 | ||
d8f5a274 AM |
6603 | switch (r_type) |
6604 | { | |
6605 | case elfcpp::R_POWERPC_GOT_TLSLD16: | |
6606 | case elfcpp::R_POWERPC_GOT_TLSGD16: | |
6607 | case elfcpp::R_POWERPC_GOT_TPREL16: | |
6608 | case elfcpp::R_POWERPC_GOT_DTPREL16: | |
6609 | case elfcpp::R_POWERPC_GOT16: | |
6610 | case elfcpp::R_PPC64_GOT16_DS: | |
6611 | case elfcpp::R_PPC64_TOC16: | |
6612 | case elfcpp::R_PPC64_TOC16_DS: | |
6613 | ppc_object->set_has_small_toc_reloc(); | |
6614 | default: | |
6615 | break; | |
6616 | } | |
dd93cd0a AM |
6617 | } |
6618 | ||
6619 | // Report an unsupported relocation against a global symbol. | |
6620 | ||
6621 | template<int size, bool big_endian> | |
6622 | void | |
6623 | Target_powerpc<size, big_endian>::Scan::unsupported_reloc_global( | |
6624 | Sized_relobj_file<size, big_endian>* object, | |
6625 | unsigned int r_type, | |
6626 | Symbol* gsym) | |
6627 | { | |
42cacb20 DE |
6628 | gold_error(_("%s: unsupported reloc %u against global symbol %s"), |
6629 | object->name().c_str(), r_type, gsym->demangled_name().c_str()); | |
6630 | } | |
6631 | ||
6632 | // Scan a relocation for a global symbol. | |
6633 | ||
6634 | template<int size, bool big_endian> | |
6635 | inline void | |
6636 | Target_powerpc<size, big_endian>::Scan::global( | |
d83ce4e3 AM |
6637 | Symbol_table* symtab, |
6638 | Layout* layout, | |
6639 | Target_powerpc<size, big_endian>* target, | |
6640 | Sized_relobj_file<size, big_endian>* object, | |
6641 | unsigned int data_shndx, | |
6642 | Output_section* output_section, | |
6643 | const elfcpp::Rela<size, big_endian>& reloc, | |
6644 | unsigned int r_type, | |
6645 | Symbol* gsym) | |
42cacb20 | 6646 | { |
e3deeb9c AM |
6647 | if (this->maybe_skip_tls_get_addr_call(r_type, gsym) == Track_tls::SKIP) |
6648 | return; | |
6649 | ||
6650 | if ((size == 64 && r_type == elfcpp::R_PPC64_TLSGD) | |
6651 | || (size == 32 && r_type == elfcpp::R_PPC_TLSGD)) | |
6652 | { | |
6653 | this->expect_tls_get_addr_call(); | |
6654 | const bool final = gsym->final_value_is_known(); | |
6655 | const tls::Tls_optimization tls_type = target->optimize_tls_gd(final); | |
6656 | if (tls_type != tls::TLSOPT_NONE) | |
6657 | this->skip_next_tls_get_addr_call(); | |
6658 | } | |
6659 | else if ((size == 64 && r_type == elfcpp::R_PPC64_TLSLD) | |
6660 | || (size == 32 && r_type == elfcpp::R_PPC_TLSLD)) | |
6661 | { | |
6662 | this->expect_tls_get_addr_call(); | |
6663 | const tls::Tls_optimization tls_type = target->optimize_tls_ld(); | |
6664 | if (tls_type != tls::TLSOPT_NONE) | |
6665 | this->skip_next_tls_get_addr_call(); | |
6666 | } | |
6667 | ||
dd93cd0a AM |
6668 | Powerpc_relobj<size, big_endian>* ppc_object |
6669 | = static_cast<Powerpc_relobj<size, big_endian>*>(object); | |
6670 | ||
e5d5f5ed | 6671 | // A STT_GNU_IFUNC symbol may require a PLT entry. |
b3ccdeb5 | 6672 | bool is_ifunc = gsym->type() == elfcpp::STT_GNU_IFUNC; |
9055360d AM |
6673 | bool pushed_ifunc = false; |
6674 | if (is_ifunc && this->reloc_needs_plt_for_ifunc(target, object, r_type, true)) | |
ec661b9d | 6675 | { |
0e123f69 | 6676 | unsigned int r_sym = elfcpp::elf_r_sym<size>(reloc.get_r_info()); |
ec661b9d | 6677 | target->push_branch(ppc_object, data_shndx, reloc.get_r_offset(), |
0e123f69 | 6678 | r_type, r_sym, reloc.get_r_addend()); |
ec661b9d | 6679 | target->make_plt_entry(symtab, layout, gsym); |
9055360d | 6680 | pushed_ifunc = true; |
ec661b9d | 6681 | } |
e5d5f5ed | 6682 | |
42cacb20 DE |
6683 | switch (r_type) |
6684 | { | |
6685 | case elfcpp::R_POWERPC_NONE: | |
6686 | case elfcpp::R_POWERPC_GNU_VTINHERIT: | |
6687 | case elfcpp::R_POWERPC_GNU_VTENTRY: | |
cf43a2fe | 6688 | case elfcpp::R_PPC_LOCAL24PC: |
7404fe1b | 6689 | case elfcpp::R_POWERPC_TLS: |
549dba71 | 6690 | case elfcpp::R_PPC64_ENTRY: |
dd93cd0a AM |
6691 | break; |
6692 | ||
6693 | case elfcpp::R_PPC64_TOC: | |
6694 | { | |
6695 | Output_data_got_powerpc<size, big_endian>* got | |
6696 | = target->got_section(symtab, layout); | |
6697 | if (parameters->options().output_is_position_independent()) | |
6698 | { | |
bfdfa4cd AM |
6699 | Address off = reloc.get_r_offset(); |
6700 | if (size == 64 | |
6701 | && data_shndx == ppc_object->opd_shndx() | |
6702 | && ppc_object->get_opd_discard(off - 8)) | |
6703 | break; | |
6704 | ||
dd93cd0a AM |
6705 | Reloc_section* rela_dyn = target->rela_dyn_section(layout); |
6706 | Powerpc_relobj<size, big_endian>* symobj = ppc_object; | |
6707 | if (data_shndx != ppc_object->opd_shndx()) | |
6708 | symobj = static_cast | |
6709 | <Powerpc_relobj<size, big_endian>*>(gsym->object()); | |
6710 | rela_dyn->add_output_section_relative(got->output_section(), | |
6711 | elfcpp::R_POWERPC_RELATIVE, | |
6712 | output_section, | |
bfdfa4cd | 6713 | object, data_shndx, off, |
dd93cd0a AM |
6714 | symobj->toc_base_offset()); |
6715 | } | |
6716 | } | |
42cacb20 DE |
6717 | break; |
6718 | ||
c9269dff | 6719 | case elfcpp::R_PPC64_ADDR64: |
bfdfa4cd | 6720 | if (size == 64 |
9055360d | 6721 | && target->abiversion() < 2 |
bfdfa4cd AM |
6722 | && data_shndx == ppc_object->opd_shndx() |
6723 | && (gsym->is_defined_in_discarded_section() | |
6724 | || gsym->object() != object)) | |
6725 | { | |
6726 | ppc_object->set_opd_discard(reloc.get_r_offset()); | |
6727 | break; | |
6728 | } | |
d8e90251 | 6729 | // Fall through. |
dd93cd0a | 6730 | case elfcpp::R_PPC64_UADDR64: |
c9269dff | 6731 | case elfcpp::R_POWERPC_ADDR32: |
dd93cd0a AM |
6732 | case elfcpp::R_POWERPC_UADDR32: |
6733 | case elfcpp::R_POWERPC_ADDR24: | |
42cacb20 DE |
6734 | case elfcpp::R_POWERPC_ADDR16: |
6735 | case elfcpp::R_POWERPC_ADDR16_LO: | |
6736 | case elfcpp::R_POWERPC_ADDR16_HI: | |
6737 | case elfcpp::R_POWERPC_ADDR16_HA: | |
dd93cd0a | 6738 | case elfcpp::R_POWERPC_UADDR16: |
f9c6b907 AM |
6739 | case elfcpp::R_PPC64_ADDR16_HIGH: |
6740 | case elfcpp::R_PPC64_ADDR16_HIGHA: | |
dd93cd0a AM |
6741 | case elfcpp::R_PPC64_ADDR16_HIGHER: |
6742 | case elfcpp::R_PPC64_ADDR16_HIGHERA: | |
6743 | case elfcpp::R_PPC64_ADDR16_HIGHEST: | |
6744 | case elfcpp::R_PPC64_ADDR16_HIGHESTA: | |
6745 | case elfcpp::R_PPC64_ADDR16_DS: | |
6746 | case elfcpp::R_PPC64_ADDR16_LO_DS: | |
6747 | case elfcpp::R_POWERPC_ADDR14: | |
6748 | case elfcpp::R_POWERPC_ADDR14_BRTAKEN: | |
6749 | case elfcpp::R_POWERPC_ADDR14_BRNTAKEN: | |
42cacb20 | 6750 | { |
c9269dff AM |
6751 | // Make a PLT entry if necessary. |
6752 | if (gsym->needs_plt_entry()) | |
6753 | { | |
9055360d AM |
6754 | // Since this is not a PC-relative relocation, we may be |
6755 | // taking the address of a function. In that case we need to | |
6756 | // set the entry in the dynamic symbol table to the address of | |
6757 | // the PLT call stub. | |
6758 | bool need_ifunc_plt = false; | |
6759 | if ((size == 32 || target->abiversion() >= 2) | |
6760 | && gsym->is_from_dynobj() | |
6761 | && !parameters->options().output_is_position_independent()) | |
6762 | { | |
6763 | gsym->set_needs_dynsym_value(); | |
6764 | need_ifunc_plt = true; | |
6765 | } | |
6766 | if (!is_ifunc || (!pushed_ifunc && need_ifunc_plt)) | |
b3ccdeb5 | 6767 | { |
0e123f69 | 6768 | unsigned int r_sym = elfcpp::elf_r_sym<size>(reloc.get_r_info()); |
b3ccdeb5 | 6769 | target->push_branch(ppc_object, data_shndx, |
0e123f69 | 6770 | reloc.get_r_offset(), r_type, r_sym, |
b3ccdeb5 AM |
6771 | reloc.get_r_addend()); |
6772 | target->make_plt_entry(symtab, layout, gsym); | |
6773 | } | |
c9269dff AM |
6774 | } |
6775 | // Make a dynamic relocation if necessary. | |
88b8e639 | 6776 | if (gsym->needs_dynamic_reloc(Scan::get_reference_flags(r_type, target)) |
9055360d | 6777 | || (size == 64 && is_ifunc && target->abiversion() < 2)) |
c9269dff | 6778 | { |
a82bef93 ST |
6779 | if (!parameters->options().output_is_position_independent() |
6780 | && gsym->may_need_copy_reloc()) | |
c9269dff AM |
6781 | { |
6782 | target->copy_reloc(symtab, layout, object, | |
6783 | data_shndx, output_section, gsym, reloc); | |
6784 | } | |
9055360d AM |
6785 | else if ((((size == 32 |
6786 | && r_type == elfcpp::R_POWERPC_ADDR32) | |
6787 | || (size == 64 | |
6788 | && r_type == elfcpp::R_PPC64_ADDR64 | |
6789 | && target->abiversion() >= 2)) | |
627b30b7 AM |
6790 | && gsym->can_use_relative_reloc(false) |
6791 | && !(gsym->visibility() == elfcpp::STV_PROTECTED | |
6792 | && parameters->options().shared())) | |
6793 | || (size == 64 | |
6794 | && r_type == elfcpp::R_PPC64_ADDR64 | |
9055360d | 6795 | && target->abiversion() < 2 |
627b30b7 AM |
6796 | && (gsym->can_use_relative_reloc(false) |
6797 | || data_shndx == ppc_object->opd_shndx()))) | |
2e702c99 | 6798 | { |
b3ccdeb5 AM |
6799 | Reloc_section* rela_dyn |
6800 | = target->rela_dyn_section(symtab, layout, is_ifunc); | |
6801 | unsigned int dynrel = (is_ifunc ? elfcpp::R_POWERPC_IRELATIVE | |
6802 | : elfcpp::R_POWERPC_RELATIVE); | |
e5d5f5ed AM |
6803 | rela_dyn->add_symbolless_global_addend( |
6804 | gsym, dynrel, output_section, object, data_shndx, | |
6805 | reloc.get_r_offset(), reloc.get_r_addend()); | |
2e702c99 RM |
6806 | } |
6807 | else | |
6808 | { | |
b3ccdeb5 AM |
6809 | Reloc_section* rela_dyn |
6810 | = target->rela_dyn_section(symtab, layout, is_ifunc); | |
42cacb20 | 6811 | check_non_pic(object, r_type); |
dd93cd0a AM |
6812 | rela_dyn->add_global(gsym, r_type, output_section, |
6813 | object, data_shndx, | |
6814 | reloc.get_r_offset(), | |
6815 | reloc.get_r_addend()); | |
5edad15d AM |
6816 | |
6817 | if (size == 64 | |
6818 | && parameters->options().toc_optimize() | |
6819 | && data_shndx == ppc_object->toc_shndx()) | |
6820 | ppc_object->set_no_toc_opt(reloc.get_r_offset()); | |
2e702c99 RM |
6821 | } |
6822 | } | |
42cacb20 DE |
6823 | } |
6824 | break; | |
6825 | ||
cf43a2fe | 6826 | case elfcpp::R_PPC_PLTREL24: |
42cacb20 | 6827 | case elfcpp::R_POWERPC_REL24: |
b3ccdeb5 AM |
6828 | if (!is_ifunc) |
6829 | { | |
0e123f69 | 6830 | unsigned int r_sym = elfcpp::elf_r_sym<size>(reloc.get_r_info()); |
b3ccdeb5 | 6831 | target->push_branch(ppc_object, data_shndx, reloc.get_r_offset(), |
0e123f69 | 6832 | r_type, r_sym, reloc.get_r_addend()); |
b3ccdeb5 AM |
6833 | if (gsym->needs_plt_entry() |
6834 | || (!gsym->final_value_is_known() | |
6835 | && (gsym->is_undefined() | |
6836 | || gsym->is_from_dynobj() | |
6837 | || gsym->is_preemptible()))) | |
6838 | target->make_plt_entry(symtab, layout, gsym); | |
6839 | } | |
d8e90251 | 6840 | // Fall through. |
42cacb20 | 6841 | |
3ea0a085 | 6842 | case elfcpp::R_PPC64_REL64: |
dd93cd0a | 6843 | case elfcpp::R_POWERPC_REL32: |
3ea0a085 | 6844 | // Make a dynamic relocation if necessary. |
88b8e639 | 6845 | if (gsym->needs_dynamic_reloc(Scan::get_reference_flags(r_type, target))) |
3ea0a085 | 6846 | { |
a82bef93 ST |
6847 | if (!parameters->options().output_is_position_independent() |
6848 | && gsym->may_need_copy_reloc()) | |
3ea0a085 AM |
6849 | { |
6850 | target->copy_reloc(symtab, layout, object, | |
6851 | data_shndx, output_section, gsym, | |
6852 | reloc); | |
6853 | } | |
6854 | else | |
6855 | { | |
b3ccdeb5 AM |
6856 | Reloc_section* rela_dyn |
6857 | = target->rela_dyn_section(symtab, layout, is_ifunc); | |
3ea0a085 AM |
6858 | check_non_pic(object, r_type); |
6859 | rela_dyn->add_global(gsym, r_type, output_section, object, | |
6860 | data_shndx, reloc.get_r_offset(), | |
6861 | reloc.get_r_addend()); | |
6862 | } | |
6863 | } | |
6864 | break; | |
6865 | ||
ec661b9d AM |
6866 | case elfcpp::R_POWERPC_REL14: |
6867 | case elfcpp::R_POWERPC_REL14_BRTAKEN: | |
6868 | case elfcpp::R_POWERPC_REL14_BRNTAKEN: | |
b3ccdeb5 | 6869 | if (!is_ifunc) |
0e123f69 AM |
6870 | { |
6871 | unsigned int r_sym = elfcpp::elf_r_sym<size>(reloc.get_r_info()); | |
6872 | target->push_branch(ppc_object, data_shndx, reloc.get_r_offset(), | |
6873 | r_type, r_sym, reloc.get_r_addend()); | |
6874 | } | |
ec661b9d AM |
6875 | break; |
6876 | ||
7e57d19e AM |
6877 | case elfcpp::R_PPC64_TOCSAVE: |
6878 | // R_PPC64_TOCSAVE follows a call instruction to indicate the | |
6879 | // caller has already saved r2 and thus a plt call stub need not | |
6880 | // save r2. | |
6881 | if (size == 64 | |
6882 | && target->mark_pltcall(ppc_object, data_shndx, | |
6883 | reloc.get_r_offset() - 4, symtab)) | |
6884 | { | |
6885 | unsigned int r_sym = elfcpp::elf_r_sym<size>(reloc.get_r_info()); | |
6886 | bool is_ordinary; | |
6887 | unsigned int shndx = gsym->shndx(&is_ordinary); | |
6888 | if (!is_ordinary) | |
6889 | object->error(_("tocsave symbol %u has bad shndx %u"), | |
6890 | r_sym, shndx); | |
6891 | else | |
6892 | { | |
6893 | Sized_symbol<size>* sym = symtab->get_sized_symbol<size>(gsym); | |
6894 | target->add_tocsave(ppc_object, shndx, | |
6895 | sym->value() + reloc.get_r_addend()); | |
6896 | } | |
6897 | } | |
6898 | break; | |
6899 | ||
6ce78956 AM |
6900 | case elfcpp::R_POWERPC_REL16: |
6901 | case elfcpp::R_POWERPC_REL16_LO: | |
6902 | case elfcpp::R_POWERPC_REL16_HI: | |
6903 | case elfcpp::R_POWERPC_REL16_HA: | |
a680de9a | 6904 | case elfcpp::R_POWERPC_REL16DX_HA: |
dd93cd0a | 6905 | case elfcpp::R_POWERPC_SECTOFF: |
dd93cd0a | 6906 | case elfcpp::R_POWERPC_SECTOFF_LO: |
dd93cd0a | 6907 | case elfcpp::R_POWERPC_SECTOFF_HI: |
dd93cd0a | 6908 | case elfcpp::R_POWERPC_SECTOFF_HA: |
f9c6b907 AM |
6909 | case elfcpp::R_PPC64_SECTOFF_DS: |
6910 | case elfcpp::R_PPC64_SECTOFF_LO_DS: | |
6911 | case elfcpp::R_POWERPC_TPREL16: | |
6912 | case elfcpp::R_POWERPC_TPREL16_LO: | |
6913 | case elfcpp::R_POWERPC_TPREL16_HI: | |
dd93cd0a | 6914 | case elfcpp::R_POWERPC_TPREL16_HA: |
f9c6b907 AM |
6915 | case elfcpp::R_PPC64_TPREL16_DS: |
6916 | case elfcpp::R_PPC64_TPREL16_LO_DS: | |
6917 | case elfcpp::R_PPC64_TPREL16_HIGH: | |
6918 | case elfcpp::R_PPC64_TPREL16_HIGHA: | |
dd93cd0a | 6919 | case elfcpp::R_PPC64_TPREL16_HIGHER: |
dd93cd0a | 6920 | case elfcpp::R_PPC64_TPREL16_HIGHERA: |
dd93cd0a | 6921 | case elfcpp::R_PPC64_TPREL16_HIGHEST: |
dd93cd0a | 6922 | case elfcpp::R_PPC64_TPREL16_HIGHESTA: |
f9c6b907 AM |
6923 | case elfcpp::R_POWERPC_DTPREL16: |
6924 | case elfcpp::R_POWERPC_DTPREL16_LO: | |
6925 | case elfcpp::R_POWERPC_DTPREL16_HI: | |
6926 | case elfcpp::R_POWERPC_DTPREL16_HA: | |
dd93cd0a AM |
6927 | case elfcpp::R_PPC64_DTPREL16_DS: |
6928 | case elfcpp::R_PPC64_DTPREL16_LO_DS: | |
f9c6b907 AM |
6929 | case elfcpp::R_PPC64_DTPREL16_HIGH: |
6930 | case elfcpp::R_PPC64_DTPREL16_HIGHA: | |
6931 | case elfcpp::R_PPC64_DTPREL16_HIGHER: | |
6932 | case elfcpp::R_PPC64_DTPREL16_HIGHERA: | |
6933 | case elfcpp::R_PPC64_DTPREL16_HIGHEST: | |
6934 | case elfcpp::R_PPC64_DTPREL16_HIGHESTA: | |
dd93cd0a AM |
6935 | case elfcpp::R_PPC64_TLSGD: |
6936 | case elfcpp::R_PPC64_TLSLD: | |
45965137 | 6937 | case elfcpp::R_PPC64_ADDR64_LOCAL: |
cf43a2fe AM |
6938 | break; |
6939 | ||
42cacb20 DE |
6940 | case elfcpp::R_POWERPC_GOT16: |
6941 | case elfcpp::R_POWERPC_GOT16_LO: | |
6942 | case elfcpp::R_POWERPC_GOT16_HI: | |
6943 | case elfcpp::R_POWERPC_GOT16_HA: | |
dd93cd0a AM |
6944 | case elfcpp::R_PPC64_GOT16_DS: |
6945 | case elfcpp::R_PPC64_GOT16_LO_DS: | |
42cacb20 | 6946 | { |
c9269dff AM |
6947 | // The symbol requires a GOT entry. |
6948 | Output_data_got_powerpc<size, big_endian>* got; | |
42cacb20 DE |
6949 | |
6950 | got = target->got_section(symtab, layout); | |
2e702c99 | 6951 | if (gsym->final_value_is_known()) |
2e702c99 | 6952 | { |
b01a4b04 AM |
6953 | if (is_ifunc |
6954 | && (size == 32 || target->abiversion() >= 2)) | |
e5d5f5ed AM |
6955 | got->add_global_plt(gsym, GOT_TYPE_STANDARD); |
6956 | else | |
6957 | got->add_global(gsym, GOT_TYPE_STANDARD); | |
6958 | } | |
6959 | else if (!gsym->has_got_offset(GOT_TYPE_STANDARD)) | |
6960 | { | |
6961 | // If we are generating a shared object or a pie, this | |
6962 | // symbol's GOT entry will be set by a dynamic relocation. | |
6963 | unsigned int off = got->add_constant(0); | |
6964 | gsym->set_got_offset(GOT_TYPE_STANDARD, off); | |
6965 | ||
b3ccdeb5 AM |
6966 | Reloc_section* rela_dyn |
6967 | = target->rela_dyn_section(symtab, layout, is_ifunc); | |
6968 | ||
e5d5f5ed | 6969 | if (gsym->can_use_relative_reloc(false) |
9055360d AM |
6970 | && !((size == 32 |
6971 | || target->abiversion() >= 2) | |
e5d5f5ed AM |
6972 | && gsym->visibility() == elfcpp::STV_PROTECTED |
6973 | && parameters->options().shared())) | |
2e702c99 | 6974 | { |
b3ccdeb5 AM |
6975 | unsigned int dynrel = (is_ifunc ? elfcpp::R_POWERPC_IRELATIVE |
6976 | : elfcpp::R_POWERPC_RELATIVE); | |
e5d5f5ed AM |
6977 | rela_dyn->add_global_relative(gsym, dynrel, got, off, 0, false); |
6978 | } | |
6979 | else | |
6980 | { | |
6981 | unsigned int dynrel = elfcpp::R_POWERPC_GLOB_DAT; | |
6982 | rela_dyn->add_global(gsym, dynrel, got, off, 0); | |
42cacb20 | 6983 | } |
2e702c99 | 6984 | } |
42cacb20 DE |
6985 | } |
6986 | break; | |
6987 | ||
cf43a2fe AM |
6988 | case elfcpp::R_PPC64_TOC16: |
6989 | case elfcpp::R_PPC64_TOC16_LO: | |
6990 | case elfcpp::R_PPC64_TOC16_HI: | |
6991 | case elfcpp::R_PPC64_TOC16_HA: | |
6992 | case elfcpp::R_PPC64_TOC16_DS: | |
6993 | case elfcpp::R_PPC64_TOC16_LO_DS: | |
42cacb20 DE |
6994 | // We need a GOT section. |
6995 | target->got_section(symtab, layout); | |
6996 | break; | |
6997 | ||
dd93cd0a AM |
6998 | case elfcpp::R_POWERPC_GOT_TLSGD16: |
6999 | case elfcpp::R_POWERPC_GOT_TLSGD16_LO: | |
7000 | case elfcpp::R_POWERPC_GOT_TLSGD16_HI: | |
7001 | case elfcpp::R_POWERPC_GOT_TLSGD16_HA: | |
7002 | { | |
7003 | const bool final = gsym->final_value_is_known(); | |
7004 | const tls::Tls_optimization tls_type = target->optimize_tls_gd(final); | |
7005 | if (tls_type == tls::TLSOPT_NONE) | |
7006 | { | |
7007 | Output_data_got_powerpc<size, big_endian>* got | |
7008 | = target->got_section(symtab, layout); | |
b3ccdeb5 AM |
7009 | Reloc_section* rela_dyn = target->rela_dyn_section(layout); |
7010 | got->add_global_pair_with_rel(gsym, GOT_TYPE_TLSGD, rela_dyn, | |
dd93cd0a AM |
7011 | elfcpp::R_POWERPC_DTPMOD, |
7012 | elfcpp::R_POWERPC_DTPREL); | |
7013 | } | |
7014 | else if (tls_type == tls::TLSOPT_TO_IE) | |
7015 | { | |
acc276d8 AM |
7016 | if (!gsym->has_got_offset(GOT_TYPE_TPREL)) |
7017 | { | |
7018 | Output_data_got_powerpc<size, big_endian>* got | |
7019 | = target->got_section(symtab, layout); | |
7020 | Reloc_section* rela_dyn = target->rela_dyn_section(layout); | |
7021 | if (gsym->is_undefined() | |
7022 | || gsym->is_from_dynobj()) | |
7023 | { | |
7024 | got->add_global_with_rel(gsym, GOT_TYPE_TPREL, rela_dyn, | |
7025 | elfcpp::R_POWERPC_TPREL); | |
7026 | } | |
7027 | else | |
7028 | { | |
7029 | unsigned int off = got->add_constant(0); | |
7030 | gsym->set_got_offset(GOT_TYPE_TPREL, off); | |
7031 | unsigned int dynrel = elfcpp::R_POWERPC_TPREL; | |
7032 | rela_dyn->add_symbolless_global_addend(gsym, dynrel, | |
7033 | got, off, 0); | |
7034 | } | |
7035 | } | |
dd93cd0a AM |
7036 | } |
7037 | else if (tls_type == tls::TLSOPT_TO_LE) | |
7038 | { | |
7039 | // no GOT relocs needed for Local Exec. | |
7040 | } | |
7041 | else | |
7042 | gold_unreachable(); | |
7043 | } | |
42cacb20 DE |
7044 | break; |
7045 | ||
dd93cd0a AM |
7046 | case elfcpp::R_POWERPC_GOT_TLSLD16: |
7047 | case elfcpp::R_POWERPC_GOT_TLSLD16_LO: | |
7048 | case elfcpp::R_POWERPC_GOT_TLSLD16_HI: | |
7049 | case elfcpp::R_POWERPC_GOT_TLSLD16_HA: | |
7050 | { | |
7051 | const tls::Tls_optimization tls_type = target->optimize_tls_ld(); | |
7052 | if (tls_type == tls::TLSOPT_NONE) | |
7053 | target->tlsld_got_offset(symtab, layout, object); | |
7054 | else if (tls_type == tls::TLSOPT_TO_LE) | |
7055 | { | |
7056 | // no GOT relocs needed for Local Exec. | |
7404fe1b AM |
7057 | if (parameters->options().emit_relocs()) |
7058 | { | |
7059 | Output_section* os = layout->tls_segment()->first_section(); | |
7060 | gold_assert(os != NULL); | |
7061 | os->set_needs_symtab_index(); | |
7062 | } | |
dd93cd0a AM |
7063 | } |
7064 | else | |
7065 | gold_unreachable(); | |
7066 | } | |
7067 | break; | |
7068 | ||
7069 | case elfcpp::R_POWERPC_GOT_DTPREL16: | |
7070 | case elfcpp::R_POWERPC_GOT_DTPREL16_LO: | |
7071 | case elfcpp::R_POWERPC_GOT_DTPREL16_HI: | |
7072 | case elfcpp::R_POWERPC_GOT_DTPREL16_HA: | |
7073 | { | |
7074 | Output_data_got_powerpc<size, big_endian>* got | |
7075 | = target->got_section(symtab, layout); | |
bd73a62d AM |
7076 | if (!gsym->final_value_is_known() |
7077 | && (gsym->is_from_dynobj() | |
7078 | || gsym->is_undefined() | |
7079 | || gsym->is_preemptible())) | |
7080 | got->add_global_with_rel(gsym, GOT_TYPE_DTPREL, | |
7081 | target->rela_dyn_section(layout), | |
7082 | elfcpp::R_POWERPC_DTPREL); | |
7083 | else | |
7084 | got->add_global_tls(gsym, GOT_TYPE_DTPREL); | |
dd93cd0a AM |
7085 | } |
7086 | break; | |
7087 | ||
7088 | case elfcpp::R_POWERPC_GOT_TPREL16: | |
7089 | case elfcpp::R_POWERPC_GOT_TPREL16_LO: | |
7090 | case elfcpp::R_POWERPC_GOT_TPREL16_HI: | |
7091 | case elfcpp::R_POWERPC_GOT_TPREL16_HA: | |
7092 | { | |
7093 | const bool final = gsym->final_value_is_known(); | |
7094 | const tls::Tls_optimization tls_type = target->optimize_tls_ie(final); | |
7095 | if (tls_type == tls::TLSOPT_NONE) | |
7096 | { | |
acc276d8 AM |
7097 | if (!gsym->has_got_offset(GOT_TYPE_TPREL)) |
7098 | { | |
7099 | Output_data_got_powerpc<size, big_endian>* got | |
7100 | = target->got_section(symtab, layout); | |
7101 | Reloc_section* rela_dyn = target->rela_dyn_section(layout); | |
7102 | if (gsym->is_undefined() | |
7103 | || gsym->is_from_dynobj()) | |
7104 | { | |
7105 | got->add_global_with_rel(gsym, GOT_TYPE_TPREL, rela_dyn, | |
7106 | elfcpp::R_POWERPC_TPREL); | |
7107 | } | |
7108 | else | |
7109 | { | |
7110 | unsigned int off = got->add_constant(0); | |
7111 | gsym->set_got_offset(GOT_TYPE_TPREL, off); | |
7112 | unsigned int dynrel = elfcpp::R_POWERPC_TPREL; | |
7113 | rela_dyn->add_symbolless_global_addend(gsym, dynrel, | |
7114 | got, off, 0); | |
7115 | } | |
7116 | } | |
dd93cd0a AM |
7117 | } |
7118 | else if (tls_type == tls::TLSOPT_TO_LE) | |
7119 | { | |
7120 | // no GOT relocs needed for Local Exec. | |
7121 | } | |
7122 | else | |
7123 | gold_unreachable(); | |
7124 | } | |
42cacb20 DE |
7125 | break; |
7126 | ||
7127 | default: | |
7128 | unsupported_reloc_global(object, r_type, gsym); | |
7129 | break; | |
7130 | } | |
d8f5a274 | 7131 | |
5edad15d AM |
7132 | if (size == 64 |
7133 | && parameters->options().toc_optimize()) | |
7134 | { | |
7135 | if (data_shndx == ppc_object->toc_shndx()) | |
7136 | { | |
7137 | bool ok = true; | |
7138 | if (r_type != elfcpp::R_PPC64_ADDR64 | |
7139 | || (is_ifunc && target->abiversion() < 2)) | |
7140 | ok = false; | |
7141 | else if (parameters->options().output_is_position_independent() | |
7142 | && (is_ifunc || gsym->is_absolute() || gsym->is_undefined())) | |
7143 | ok = false; | |
7144 | if (!ok) | |
7145 | ppc_object->set_no_toc_opt(reloc.get_r_offset()); | |
7146 | } | |
7147 | ||
7148 | enum {no_check, check_lo, check_ha} insn_check; | |
7149 | switch (r_type) | |
7150 | { | |
7151 | default: | |
7152 | insn_check = no_check; | |
7153 | break; | |
7154 | ||
7155 | case elfcpp::R_POWERPC_GOT_TLSLD16_HA: | |
7156 | case elfcpp::R_POWERPC_GOT_TLSGD16_HA: | |
7157 | case elfcpp::R_POWERPC_GOT_TPREL16_HA: | |
7158 | case elfcpp::R_POWERPC_GOT_DTPREL16_HA: | |
7159 | case elfcpp::R_POWERPC_GOT16_HA: | |
7160 | case elfcpp::R_PPC64_TOC16_HA: | |
7161 | insn_check = check_ha; | |
7162 | break; | |
7163 | ||
7164 | case elfcpp::R_POWERPC_GOT_TLSLD16_LO: | |
7165 | case elfcpp::R_POWERPC_GOT_TLSGD16_LO: | |
7166 | case elfcpp::R_POWERPC_GOT_TPREL16_LO: | |
7167 | case elfcpp::R_POWERPC_GOT_DTPREL16_LO: | |
7168 | case elfcpp::R_POWERPC_GOT16_LO: | |
7169 | case elfcpp::R_PPC64_GOT16_LO_DS: | |
7170 | case elfcpp::R_PPC64_TOC16_LO: | |
7171 | case elfcpp::R_PPC64_TOC16_LO_DS: | |
7172 | insn_check = check_lo; | |
7173 | break; | |
7174 | } | |
7175 | ||
7176 | section_size_type slen; | |
7177 | const unsigned char* view = NULL; | |
7178 | if (insn_check != no_check) | |
7179 | { | |
7180 | view = ppc_object->section_contents(data_shndx, &slen, false); | |
7181 | section_size_type off = | |
7182 | convert_to_section_size_type(reloc.get_r_offset()) & -4; | |
7183 | if (off < slen) | |
7184 | { | |
7185 | uint32_t insn = elfcpp::Swap<32, big_endian>::readval(view + off); | |
7186 | if (insn_check == check_lo | |
7187 | ? !ok_lo_toc_insn(insn, r_type) | |
7188 | : ((insn & ((0x3f << 26) | 0x1f << 16)) | |
7189 | != ((15u << 26) | (2 << 16)) /* addis rt,2,imm */)) | |
7190 | { | |
7191 | ppc_object->set_no_toc_opt(); | |
7192 | gold_warning(_("%s: toc optimization is not supported " | |
7193 | "for %#08x instruction"), | |
7194 | ppc_object->name().c_str(), insn); | |
7195 | } | |
7196 | } | |
7197 | } | |
7198 | ||
7199 | switch (r_type) | |
7200 | { | |
7201 | default: | |
7202 | break; | |
7203 | case elfcpp::R_PPC64_TOC16: | |
7204 | case elfcpp::R_PPC64_TOC16_LO: | |
7205 | case elfcpp::R_PPC64_TOC16_HI: | |
7206 | case elfcpp::R_PPC64_TOC16_HA: | |
7207 | case elfcpp::R_PPC64_TOC16_DS: | |
7208 | case elfcpp::R_PPC64_TOC16_LO_DS: | |
7209 | if (gsym->source() == Symbol::FROM_OBJECT | |
7210 | && !gsym->object()->is_dynamic()) | |
7211 | { | |
7212 | Powerpc_relobj<size, big_endian>* sym_object | |
7213 | = static_cast<Powerpc_relobj<size, big_endian>*>(gsym->object()); | |
7214 | bool is_ordinary; | |
7215 | unsigned int shndx = gsym->shndx(&is_ordinary); | |
7216 | if (shndx == sym_object->toc_shndx()) | |
7217 | { | |
7218 | Sized_symbol<size>* sym = symtab->get_sized_symbol<size>(gsym); | |
7219 | Address dst_off = sym->value() + reloc.get_r_offset(); | |
7220 | if (dst_off < sym_object->section_size(shndx)) | |
7221 | { | |
7222 | bool ok = false; | |
7223 | if (r_type == elfcpp::R_PPC64_TOC16_HA) | |
7224 | ok = true; | |
7225 | else if (r_type == elfcpp::R_PPC64_TOC16_LO_DS) | |
7226 | { | |
7227 | // Need to check that the insn is a ld | |
7228 | if (!view) | |
7229 | view = ppc_object->section_contents(data_shndx, | |
7230 | &slen, | |
7231 | false); | |
7232 | section_size_type off = | |
7233 | (convert_to_section_size_type(reloc.get_r_offset()) | |
7234 | + (big_endian ? -2 : 3)); | |
7235 | if (off < slen | |
7236 | && (view[off] & (0x3f << 2)) == (58u << 2)) | |
7237 | ok = true; | |
7238 | } | |
7239 | if (!ok) | |
7240 | sym_object->set_no_toc_opt(dst_off); | |
7241 | } | |
7242 | } | |
7243 | } | |
7244 | break; | |
7245 | } | |
7246 | } | |
7247 | ||
f159cdb6 AM |
7248 | if (size == 32) |
7249 | { | |
7250 | switch (r_type) | |
7251 | { | |
7252 | case elfcpp::R_PPC_LOCAL24PC: | |
7253 | if (strcmp(gsym->name(), "_GLOBAL_OFFSET_TABLE_") == 0) | |
7254 | gold_error(_("%s: unsupported -mbss-plt code"), | |
7255 | ppc_object->name().c_str()); | |
7256 | break; | |
7257 | default: | |
7258 | break; | |
7259 | } | |
7260 | } | |
7261 | ||
d8f5a274 AM |
7262 | switch (r_type) |
7263 | { | |
7264 | case elfcpp::R_POWERPC_GOT_TLSLD16: | |
7265 | case elfcpp::R_POWERPC_GOT_TLSGD16: | |
7266 | case elfcpp::R_POWERPC_GOT_TPREL16: | |
7267 | case elfcpp::R_POWERPC_GOT_DTPREL16: | |
7268 | case elfcpp::R_POWERPC_GOT16: | |
7269 | case elfcpp::R_PPC64_GOT16_DS: | |
7270 | case elfcpp::R_PPC64_TOC16: | |
7271 | case elfcpp::R_PPC64_TOC16_DS: | |
7272 | ppc_object->set_has_small_toc_reloc(); | |
7273 | default: | |
7274 | break; | |
7275 | } | |
42cacb20 DE |
7276 | } |
7277 | ||
6d03d481 ST |
7278 | // Process relocations for gc. |
7279 | ||
7280 | template<int size, bool big_endian> | |
7281 | void | |
7282 | Target_powerpc<size, big_endian>::gc_process_relocs( | |
d83ce4e3 AM |
7283 | Symbol_table* symtab, |
7284 | Layout* layout, | |
7285 | Sized_relobj_file<size, big_endian>* object, | |
7286 | unsigned int data_shndx, | |
7287 | unsigned int, | |
7288 | const unsigned char* prelocs, | |
7289 | size_t reloc_count, | |
7290 | Output_section* output_section, | |
7291 | bool needs_special_offset_handling, | |
7292 | size_t local_symbol_count, | |
7293 | const unsigned char* plocal_symbols) | |
6d03d481 ST |
7294 | { |
7295 | typedef Target_powerpc<size, big_endian> Powerpc; | |
4d625b70 CC |
7296 | typedef gold::Default_classify_reloc<elfcpp::SHT_RELA, size, big_endian> |
7297 | Classify_reloc; | |
7298 | ||
e81fea4d AM |
7299 | Powerpc_relobj<size, big_endian>* ppc_object |
7300 | = static_cast<Powerpc_relobj<size, big_endian>*>(object); | |
7301 | if (size == 64) | |
7302 | ppc_object->set_opd_valid(); | |
7303 | if (size == 64 && data_shndx == ppc_object->opd_shndx()) | |
7304 | { | |
7305 | typename Powerpc_relobj<size, big_endian>::Access_from::iterator p; | |
7306 | for (p = ppc_object->access_from_map()->begin(); | |
7307 | p != ppc_object->access_from_map()->end(); | |
7308 | ++p) | |
7309 | { | |
7310 | Address dst_off = p->first; | |
7311 | unsigned int dst_indx = ppc_object->get_opd_ent(dst_off); | |
7312 | typename Powerpc_relobj<size, big_endian>::Section_refs::iterator s; | |
7313 | for (s = p->second.begin(); s != p->second.end(); ++s) | |
7314 | { | |
efc6fa12 | 7315 | Relobj* src_obj = s->first; |
e81fea4d AM |
7316 | unsigned int src_indx = s->second; |
7317 | symtab->gc()->add_reference(src_obj, src_indx, | |
7318 | ppc_object, dst_indx); | |
7319 | } | |
7320 | p->second.clear(); | |
7321 | } | |
7322 | ppc_object->access_from_map()->clear(); | |
c6de8ed4 | 7323 | ppc_object->process_gc_mark(symtab); |
e81fea4d AM |
7324 | // Don't look at .opd relocs as .opd will reference everything. |
7325 | return; | |
7326 | } | |
6d03d481 | 7327 | |
4d625b70 | 7328 | gold::gc_process_relocs<size, big_endian, Powerpc, Scan, Classify_reloc>( |
6d03d481 ST |
7329 | symtab, |
7330 | layout, | |
7331 | this, | |
7332 | object, | |
7333 | data_shndx, | |
7334 | prelocs, | |
7335 | reloc_count, | |
7336 | output_section, | |
7337 | needs_special_offset_handling, | |
7338 | local_symbol_count, | |
7339 | plocal_symbols); | |
7340 | } | |
7341 | ||
e81fea4d AM |
7342 | // Handle target specific gc actions when adding a gc reference from |
7343 | // SRC_OBJ, SRC_SHNDX to a location specified by DST_OBJ, DST_SHNDX | |
7344 | // and DST_OFF. For powerpc64, this adds a referenc to the code | |
7345 | // section of a function descriptor. | |
7346 | ||
7347 | template<int size, bool big_endian> | |
7348 | void | |
7349 | Target_powerpc<size, big_endian>::do_gc_add_reference( | |
7350 | Symbol_table* symtab, | |
efc6fa12 | 7351 | Relobj* src_obj, |
e81fea4d | 7352 | unsigned int src_shndx, |
efc6fa12 | 7353 | Relobj* dst_obj, |
e81fea4d AM |
7354 | unsigned int dst_shndx, |
7355 | Address dst_off) const | |
7356 | { | |
6c77229c AM |
7357 | if (size != 64 || dst_obj->is_dynamic()) |
7358 | return; | |
7359 | ||
e81fea4d AM |
7360 | Powerpc_relobj<size, big_endian>* ppc_object |
7361 | = static_cast<Powerpc_relobj<size, big_endian>*>(dst_obj); | |
a2d7bf59 | 7362 | if (dst_shndx != 0 && dst_shndx == ppc_object->opd_shndx()) |
e81fea4d AM |
7363 | { |
7364 | if (ppc_object->opd_valid()) | |
7365 | { | |
7366 | dst_shndx = ppc_object->get_opd_ent(dst_off); | |
7367 | symtab->gc()->add_reference(src_obj, src_shndx, dst_obj, dst_shndx); | |
7368 | } | |
7369 | else | |
7370 | { | |
7371 | // If we haven't run scan_opd_relocs, we must delay | |
7372 | // processing this function descriptor reference. | |
7373 | ppc_object->add_reference(src_obj, src_shndx, dst_off); | |
7374 | } | |
7375 | } | |
7376 | } | |
7377 | ||
7378 | // Add any special sections for this symbol to the gc work list. | |
7379 | // For powerpc64, this adds the code section of a function | |
7380 | // descriptor. | |
7381 | ||
7382 | template<int size, bool big_endian> | |
7383 | void | |
7384 | Target_powerpc<size, big_endian>::do_gc_mark_symbol( | |
7385 | Symbol_table* symtab, | |
7386 | Symbol* sym) const | |
7387 | { | |
7388 | if (size == 64) | |
7389 | { | |
7390 | Powerpc_relobj<size, big_endian>* ppc_object | |
7391 | = static_cast<Powerpc_relobj<size, big_endian>*>(sym->object()); | |
7392 | bool is_ordinary; | |
7393 | unsigned int shndx = sym->shndx(&is_ordinary); | |
a2d7bf59 | 7394 | if (is_ordinary && shndx != 0 && shndx == ppc_object->opd_shndx()) |
e81fea4d AM |
7395 | { |
7396 | Sized_symbol<size>* gsym = symtab->get_sized_symbol<size>(sym); | |
7397 | Address dst_off = gsym->value(); | |
c6de8ed4 AM |
7398 | if (ppc_object->opd_valid()) |
7399 | { | |
7400 | unsigned int dst_indx = ppc_object->get_opd_ent(dst_off); | |
4277535c RÁE |
7401 | symtab->gc()->worklist().push_back(Section_id(ppc_object, |
7402 | dst_indx)); | |
c6de8ed4 AM |
7403 | } |
7404 | else | |
7405 | ppc_object->add_gc_mark(dst_off); | |
e81fea4d AM |
7406 | } |
7407 | } | |
7408 | } | |
7409 | ||
dc3714f3 AM |
7410 | // For a symbol location in .opd, set LOC to the location of the |
7411 | // function entry. | |
7412 | ||
7413 | template<int size, bool big_endian> | |
7414 | void | |
7415 | Target_powerpc<size, big_endian>::do_function_location( | |
7416 | Symbol_location* loc) const | |
7417 | { | |
a2d7bf59 | 7418 | if (size == 64 && loc->shndx != 0) |
dc3714f3 AM |
7419 | { |
7420 | if (loc->object->is_dynamic()) | |
7421 | { | |
7422 | Powerpc_dynobj<size, big_endian>* ppc_object | |
7423 | = static_cast<Powerpc_dynobj<size, big_endian>*>(loc->object); | |
7424 | if (loc->shndx == ppc_object->opd_shndx()) | |
7425 | { | |
7426 | Address dest_off; | |
7427 | Address off = loc->offset - ppc_object->opd_address(); | |
7428 | loc->shndx = ppc_object->get_opd_ent(off, &dest_off); | |
7429 | loc->offset = dest_off; | |
7430 | } | |
7431 | } | |
7432 | else | |
7433 | { | |
7434 | const Powerpc_relobj<size, big_endian>* ppc_object | |
7435 | = static_cast<const Powerpc_relobj<size, big_endian>*>(loc->object); | |
7436 | if (loc->shndx == ppc_object->opd_shndx()) | |
7437 | { | |
7438 | Address dest_off; | |
7439 | loc->shndx = ppc_object->get_opd_ent(loc->offset, &dest_off); | |
7440 | loc->offset = dest_off; | |
7441 | } | |
7442 | } | |
7443 | } | |
7444 | } | |
7445 | ||
bbec1a5d AM |
7446 | // FNOFFSET in section SHNDX in OBJECT is the start of a function |
7447 | // compiled with -fsplit-stack. The function calls non-split-stack | |
7448 | // code. Change the function to ensure it has enough stack space to | |
7449 | // call some random function. | |
7450 | ||
7451 | template<int size, bool big_endian> | |
7452 | void | |
7453 | Target_powerpc<size, big_endian>::do_calls_non_split( | |
7454 | Relobj* object, | |
7455 | unsigned int shndx, | |
7456 | section_offset_type fnoffset, | |
7457 | section_size_type fnsize, | |
6e0813d3 CC |
7458 | const unsigned char* prelocs, |
7459 | size_t reloc_count, | |
bbec1a5d AM |
7460 | unsigned char* view, |
7461 | section_size_type view_size, | |
7462 | std::string* from, | |
7463 | std::string* to) const | |
7464 | { | |
7465 | // 32-bit not supported. | |
7466 | if (size == 32) | |
7467 | { | |
7468 | // warn | |
7469 | Target::do_calls_non_split(object, shndx, fnoffset, fnsize, | |
6e0813d3 CC |
7470 | prelocs, reloc_count, view, view_size, |
7471 | from, to); | |
bbec1a5d AM |
7472 | return; |
7473 | } | |
7474 | ||
7475 | // The function always starts with | |
7476 | // ld %r0,-0x7000-64(%r13) # tcbhead_t.__private_ss | |
7477 | // addis %r12,%r1,-allocate@ha | |
7478 | // addi %r12,%r12,-allocate@l | |
7479 | // cmpld %r12,%r0 | |
7480 | // but note that the addis or addi may be replaced with a nop | |
7481 | ||
7482 | unsigned char *entry = view + fnoffset; | |
7483 | uint32_t insn = elfcpp::Swap<32, big_endian>::readval(entry); | |
7484 | ||
7485 | if ((insn & 0xffff0000) == addis_2_12) | |
7486 | { | |
7487 | /* Skip ELFv2 global entry code. */ | |
7488 | entry += 8; | |
7489 | insn = elfcpp::Swap<32, big_endian>::readval(entry); | |
7490 | } | |
7491 | ||
7492 | unsigned char *pinsn = entry; | |
7493 | bool ok = false; | |
7494 | const uint32_t ld_private_ss = 0xe80d8fc0; | |
7495 | if (insn == ld_private_ss) | |
7496 | { | |
7497 | int32_t allocate = 0; | |
7498 | while (1) | |
7499 | { | |
7500 | pinsn += 4; | |
7501 | insn = elfcpp::Swap<32, big_endian>::readval(pinsn); | |
7502 | if ((insn & 0xffff0000) == addis_12_1) | |
7503 | allocate += (insn & 0xffff) << 16; | |
7504 | else if ((insn & 0xffff0000) == addi_12_1 | |
7505 | || (insn & 0xffff0000) == addi_12_12) | |
7506 | allocate += ((insn & 0xffff) ^ 0x8000) - 0x8000; | |
7507 | else if (insn != nop) | |
7508 | break; | |
7509 | } | |
7510 | if (insn == cmpld_7_12_0 && pinsn == entry + 12) | |
7511 | { | |
7512 | int extra = parameters->options().split_stack_adjust_size(); | |
7513 | allocate -= extra; | |
7514 | if (allocate >= 0 || extra < 0) | |
7515 | { | |
7516 | object->error(_("split-stack stack size overflow at " | |
7517 | "section %u offset %0zx"), | |
7518 | shndx, static_cast<size_t>(fnoffset)); | |
7519 | return; | |
7520 | } | |
7521 | pinsn = entry + 4; | |
7522 | insn = addis_12_1 | (((allocate + 0x8000) >> 16) & 0xffff); | |
7523 | if (insn != addis_12_1) | |
7524 | { | |
7525 | elfcpp::Swap<32, big_endian>::writeval(pinsn, insn); | |
7526 | pinsn += 4; | |
7527 | insn = addi_12_12 | (allocate & 0xffff); | |
7528 | if (insn != addi_12_12) | |
7529 | { | |
7530 | elfcpp::Swap<32, big_endian>::writeval(pinsn, insn); | |
7531 | pinsn += 4; | |
7532 | } | |
7533 | } | |
7534 | else | |
7535 | { | |
7536 | insn = addi_12_1 | (allocate & 0xffff); | |
7537 | elfcpp::Swap<32, big_endian>::writeval(pinsn, insn); | |
7538 | pinsn += 4; | |
7539 | } | |
7540 | if (pinsn != entry + 12) | |
7541 | elfcpp::Swap<32, big_endian>::writeval(pinsn, nop); | |
7542 | ||
7543 | ok = true; | |
7544 | } | |
7545 | } | |
7546 | ||
7547 | if (!ok) | |
7548 | { | |
7549 | if (!object->has_no_split_stack()) | |
7550 | object->error(_("failed to match split-stack sequence at " | |
7551 | "section %u offset %0zx"), | |
7552 | shndx, static_cast<size_t>(fnoffset)); | |
7553 | } | |
7554 | } | |
7555 | ||
42cacb20 DE |
7556 | // Scan relocations for a section. |
7557 | ||
7558 | template<int size, bool big_endian> | |
7559 | void | |
7560 | Target_powerpc<size, big_endian>::scan_relocs( | |
d83ce4e3 AM |
7561 | Symbol_table* symtab, |
7562 | Layout* layout, | |
7563 | Sized_relobj_file<size, big_endian>* object, | |
7564 | unsigned int data_shndx, | |
7565 | unsigned int sh_type, | |
7566 | const unsigned char* prelocs, | |
7567 | size_t reloc_count, | |
7568 | Output_section* output_section, | |
7569 | bool needs_special_offset_handling, | |
7570 | size_t local_symbol_count, | |
7571 | const unsigned char* plocal_symbols) | |
42cacb20 DE |
7572 | { |
7573 | typedef Target_powerpc<size, big_endian> Powerpc; | |
4d625b70 CC |
7574 | typedef gold::Default_classify_reloc<elfcpp::SHT_RELA, size, big_endian> |
7575 | Classify_reloc; | |
42cacb20 DE |
7576 | |
7577 | if (sh_type == elfcpp::SHT_REL) | |
7578 | { | |
7579 | gold_error(_("%s: unsupported REL reloc section"), | |
7580 | object->name().c_str()); | |
7581 | return; | |
7582 | } | |
7583 | ||
4d625b70 | 7584 | gold::scan_relocs<size, big_endian, Powerpc, Scan, Classify_reloc>( |
42cacb20 DE |
7585 | symtab, |
7586 | layout, | |
7587 | this, | |
7588 | object, | |
7589 | data_shndx, | |
7590 | prelocs, | |
7591 | reloc_count, | |
7592 | output_section, | |
7593 | needs_special_offset_handling, | |
7594 | local_symbol_count, | |
7595 | plocal_symbols); | |
7596 | } | |
7597 | ||
ec4dbad3 AM |
7598 | // Functor class for processing the global symbol table. |
7599 | // Removes symbols defined on discarded opd entries. | |
7600 | ||
7601 | template<bool big_endian> | |
7602 | class Global_symbol_visitor_opd | |
7603 | { | |
7604 | public: | |
7605 | Global_symbol_visitor_opd() | |
7606 | { } | |
7607 | ||
7608 | void | |
7609 | operator()(Sized_symbol<64>* sym) | |
7610 | { | |
7611 | if (sym->has_symtab_index() | |
7612 | || sym->source() != Symbol::FROM_OBJECT | |
7613 | || !sym->in_real_elf()) | |
7614 | return; | |
7615 | ||
6c77229c AM |
7616 | if (sym->object()->is_dynamic()) |
7617 | return; | |
7618 | ||
ec4dbad3 AM |
7619 | Powerpc_relobj<64, big_endian>* symobj |
7620 | = static_cast<Powerpc_relobj<64, big_endian>*>(sym->object()); | |
6c77229c | 7621 | if (symobj->opd_shndx() == 0) |
ec4dbad3 AM |
7622 | return; |
7623 | ||
7624 | bool is_ordinary; | |
7625 | unsigned int shndx = sym->shndx(&is_ordinary); | |
7626 | if (shndx == symobj->opd_shndx() | |
7627 | && symobj->get_opd_discard(sym->value())) | |
1611bc4a AM |
7628 | { |
7629 | sym->set_undefined(); | |
e3ee8ed4 | 7630 | sym->set_visibility(elfcpp::STV_DEFAULT); |
1611bc4a AM |
7631 | sym->set_is_defined_in_discarded_section(); |
7632 | sym->set_symtab_index(-1U); | |
7633 | } | |
ec4dbad3 AM |
7634 | } |
7635 | }; | |
7636 | ||
f3a0ed29 AM |
7637 | template<int size, bool big_endian> |
7638 | void | |
7639 | Target_powerpc<size, big_endian>::define_save_restore_funcs( | |
7640 | Layout* layout, | |
7641 | Symbol_table* symtab) | |
7642 | { | |
7643 | if (size == 64) | |
7644 | { | |
d49044c7 AM |
7645 | Output_data_save_res<size, big_endian>* savres |
7646 | = new Output_data_save_res<size, big_endian>(symtab); | |
7647 | this->savres_section_ = savres; | |
f3a0ed29 AM |
7648 | layout->add_output_section_data(".text", elfcpp::SHT_PROGBITS, |
7649 | elfcpp::SHF_ALLOC | elfcpp::SHF_EXECINSTR, | |
7650 | savres, ORDER_TEXT, false); | |
7651 | } | |
7652 | } | |
7653 | ||
d8f5a274 AM |
7654 | // Sort linker created .got section first (for the header), then input |
7655 | // sections belonging to files using small model code. | |
7656 | ||
7657 | template<bool big_endian> | |
7658 | class Sort_toc_sections | |
7659 | { | |
7660 | public: | |
7661 | bool | |
7662 | operator()(const Output_section::Input_section& is1, | |
7663 | const Output_section::Input_section& is2) const | |
7664 | { | |
7665 | if (!is1.is_input_section() && is2.is_input_section()) | |
7666 | return true; | |
7667 | bool small1 | |
7668 | = (is1.is_input_section() | |
7669 | && (static_cast<const Powerpc_relobj<64, big_endian>*>(is1.relobj()) | |
7670 | ->has_small_toc_reloc())); | |
7671 | bool small2 | |
7672 | = (is2.is_input_section() | |
7673 | && (static_cast<const Powerpc_relobj<64, big_endian>*>(is2.relobj()) | |
7674 | ->has_small_toc_reloc())); | |
7675 | return small1 && !small2; | |
7676 | } | |
7677 | }; | |
7678 | ||
42cacb20 DE |
7679 | // Finalize the sections. |
7680 | ||
7681 | template<int size, bool big_endian> | |
7682 | void | |
d5b40221 DK |
7683 | Target_powerpc<size, big_endian>::do_finalize_sections( |
7684 | Layout* layout, | |
f59f41f3 | 7685 | const Input_objects*, |
ec4dbad3 | 7686 | Symbol_table* symtab) |
42cacb20 | 7687 | { |
c9824451 AM |
7688 | if (parameters->doing_static_link()) |
7689 | { | |
7690 | // At least some versions of glibc elf-init.o have a strong | |
7691 | // reference to __rela_iplt marker syms. A weak ref would be | |
7692 | // better.. | |
7693 | if (this->iplt_ != NULL) | |
7694 | { | |
7695 | Reloc_section* rel = this->iplt_->rel_plt(); | |
7696 | symtab->define_in_output_data("__rela_iplt_start", NULL, | |
7697 | Symbol_table::PREDEFINED, rel, 0, 0, | |
7698 | elfcpp::STT_NOTYPE, elfcpp::STB_GLOBAL, | |
7699 | elfcpp::STV_HIDDEN, 0, false, true); | |
7700 | symtab->define_in_output_data("__rela_iplt_end", NULL, | |
7701 | Symbol_table::PREDEFINED, rel, 0, 0, | |
7702 | elfcpp::STT_NOTYPE, elfcpp::STB_GLOBAL, | |
7703 | elfcpp::STV_HIDDEN, 0, true, true); | |
7704 | } | |
7705 | else | |
7706 | { | |
7707 | symtab->define_as_constant("__rela_iplt_start", NULL, | |
7708 | Symbol_table::PREDEFINED, 0, 0, | |
7709 | elfcpp::STT_NOTYPE, elfcpp::STB_GLOBAL, | |
7710 | elfcpp::STV_HIDDEN, 0, true, false); | |
7711 | symtab->define_as_constant("__rela_iplt_end", NULL, | |
7712 | Symbol_table::PREDEFINED, 0, 0, | |
7713 | elfcpp::STT_NOTYPE, elfcpp::STB_GLOBAL, | |
7714 | elfcpp::STV_HIDDEN, 0, true, false); | |
7715 | } | |
7716 | } | |
7717 | ||
ec4dbad3 AM |
7718 | if (size == 64) |
7719 | { | |
7720 | typedef Global_symbol_visitor_opd<big_endian> Symbol_visitor; | |
7721 | symtab->for_all_symbols<64, Symbol_visitor>(Symbol_visitor()); | |
ec661b9d AM |
7722 | |
7723 | if (!parameters->options().relocatable()) | |
7724 | { | |
7725 | this->define_save_restore_funcs(layout, symtab); | |
7726 | ||
7727 | // Annoyingly, we need to make these sections now whether or | |
7728 | // not we need them. If we delay until do_relax then we | |
7729 | // need to mess with the relaxation machinery checkpointing. | |
7730 | this->got_section(symtab, layout); | |
7731 | this->make_brlt_section(layout); | |
d8f5a274 AM |
7732 | |
7733 | if (parameters->options().toc_sort()) | |
7734 | { | |
7735 | Output_section* os = this->got_->output_section(); | |
7736 | if (os != NULL && os->input_sections().size() > 1) | |
7737 | std::stable_sort(os->input_sections().begin(), | |
7738 | os->input_sections().end(), | |
7739 | Sort_toc_sections<big_endian>()); | |
7740 | } | |
ec661b9d | 7741 | } |
ec4dbad3 AM |
7742 | } |
7743 | ||
42cacb20 | 7744 | // Fill in some more dynamic tags. |
c9269dff | 7745 | Output_data_dynamic* odyn = layout->dynamic_data(); |
c9824451 | 7746 | if (odyn != NULL) |
cf43a2fe | 7747 | { |
c9824451 AM |
7748 | const Reloc_section* rel_plt = (this->plt_ == NULL |
7749 | ? NULL | |
7750 | : this->plt_->rel_plt()); | |
7751 | layout->add_target_dynamic_tags(false, this->plt_, rel_plt, | |
7752 | this->rela_dyn_, true, size == 32); | |
7753 | ||
7754 | if (size == 32) | |
dd93cd0a | 7755 | { |
c9824451 AM |
7756 | if (this->got_ != NULL) |
7757 | { | |
7758 | this->got_->finalize_data_size(); | |
7759 | odyn->add_section_plus_offset(elfcpp::DT_PPC_GOT, | |
7760 | this->got_, this->got_->g_o_t()); | |
7761 | } | |
dd93cd0a | 7762 | } |
c9824451 | 7763 | else |
dd93cd0a | 7764 | { |
c9824451 AM |
7765 | if (this->glink_ != NULL) |
7766 | { | |
7767 | this->glink_->finalize_data_size(); | |
7768 | odyn->add_section_plus_offset(elfcpp::DT_PPC64_GLINK, | |
7769 | this->glink_, | |
ec661b9d | 7770 | (this->glink_->pltresolve_size |
c9824451 AM |
7771 | - 32)); |
7772 | } | |
dd93cd0a | 7773 | } |
c9269dff | 7774 | } |
cf43a2fe | 7775 | |
42cacb20 DE |
7776 | // Emit any relocs we saved in an attempt to avoid generating COPY |
7777 | // relocs. | |
7778 | if (this->copy_relocs_.any_saved_relocs()) | |
7779 | this->copy_relocs_.emit(this->rela_dyn_section(layout)); | |
7780 | } | |
7781 | ||
5edad15d AM |
7782 | // Emit any saved relocs, and mark toc entries using any of these |
7783 | // relocs as not optimizable. | |
aba6bc71 | 7784 | |
5edad15d AM |
7785 | template<int sh_type, int size, bool big_endian> |
7786 | void | |
7787 | Powerpc_copy_relocs<sh_type, size, big_endian>::emit( | |
7788 | Output_data_reloc<sh_type, true, size, big_endian>* reloc_section) | |
aba6bc71 | 7789 | { |
5edad15d AM |
7790 | if (size == 64 |
7791 | && parameters->options().toc_optimize()) | |
7792 | { | |
7793 | for (typename Copy_relocs<sh_type, size, big_endian>:: | |
7794 | Copy_reloc_entries::iterator p = this->entries_.begin(); | |
7795 | p != this->entries_.end(); | |
7796 | ++p) | |
7797 | { | |
7798 | typename Copy_relocs<sh_type, size, big_endian>::Copy_reloc_entry& | |
7799 | entry = *p; | |
7800 | ||
7801 | // If the symbol is no longer defined in a dynamic object, | |
7802 | // then we emitted a COPY relocation. If it is still | |
7803 | // dynamic then we'll need dynamic relocations and thus | |
7804 | // can't optimize toc entries. | |
7805 | if (entry.sym_->is_from_dynobj()) | |
7806 | { | |
7807 | Powerpc_relobj<size, big_endian>* ppc_object | |
7808 | = static_cast<Powerpc_relobj<size, big_endian>*>(entry.relobj_); | |
7809 | if (entry.shndx_ == ppc_object->toc_shndx()) | |
7810 | ppc_object->set_no_toc_opt(entry.address_); | |
7811 | } | |
7812 | } | |
7813 | } | |
7814 | ||
7815 | Copy_relocs<sh_type, size, big_endian>::emit(reloc_section); | |
aba6bc71 AM |
7816 | } |
7817 | ||
3ea0a085 AM |
7818 | // Return the value to use for a branch relocation. |
7819 | ||
7820 | template<int size, bool big_endian> | |
1611bc4a | 7821 | bool |
3ea0a085 | 7822 | Target_powerpc<size, big_endian>::symval_for_branch( |
6c77229c | 7823 | const Symbol_table* symtab, |
3ea0a085 AM |
7824 | const Sized_symbol<size>* gsym, |
7825 | Powerpc_relobj<size, big_endian>* object, | |
1611bc4a | 7826 | Address *value, |
3ea0a085 AM |
7827 | unsigned int *dest_shndx) |
7828 | { | |
9055360d AM |
7829 | if (size == 32 || this->abiversion() >= 2) |
7830 | gold_unreachable(); | |
3ea0a085 | 7831 | *dest_shndx = 0; |
3ea0a085 AM |
7832 | |
7833 | // If the symbol is defined in an opd section, ie. is a function | |
7834 | // descriptor, use the function descriptor code entry address | |
7835 | Powerpc_relobj<size, big_endian>* symobj = object; | |
f3a0ed29 | 7836 | if (gsym != NULL |
0e123f69 AM |
7837 | && (gsym->source() != Symbol::FROM_OBJECT |
7838 | || gsym->object()->is_dynamic())) | |
1611bc4a | 7839 | return true; |
3ea0a085 AM |
7840 | if (gsym != NULL) |
7841 | symobj = static_cast<Powerpc_relobj<size, big_endian>*>(gsym->object()); | |
7842 | unsigned int shndx = symobj->opd_shndx(); | |
7843 | if (shndx == 0) | |
1611bc4a | 7844 | return true; |
3ea0a085 | 7845 | Address opd_addr = symobj->get_output_section_offset(shndx); |
a2d7bf59 | 7846 | if (opd_addr == invalid_address) |
1611bc4a | 7847 | return true; |
c6905c28 | 7848 | opd_addr += symobj->output_section_address(shndx); |
1611bc4a | 7849 | if (*value >= opd_addr && *value < opd_addr + symobj->section_size(shndx)) |
3ea0a085 AM |
7850 | { |
7851 | Address sec_off; | |
1611bc4a | 7852 | *dest_shndx = symobj->get_opd_ent(*value - opd_addr, &sec_off); |
6c77229c AM |
7853 | if (symtab->is_section_folded(symobj, *dest_shndx)) |
7854 | { | |
7855 | Section_id folded | |
7856 | = symtab->icf()->get_folded_section(symobj, *dest_shndx); | |
7857 | symobj = static_cast<Powerpc_relobj<size, big_endian>*>(folded.first); | |
7858 | *dest_shndx = folded.second; | |
7859 | } | |
3ea0a085 | 7860 | Address sec_addr = symobj->get_output_section_offset(*dest_shndx); |
1611bc4a AM |
7861 | if (sec_addr == invalid_address) |
7862 | return false; | |
7863 | ||
3ea0a085 | 7864 | sec_addr += symobj->output_section(*dest_shndx)->address(); |
1611bc4a | 7865 | *value = sec_addr + sec_off; |
3ea0a085 | 7866 | } |
1611bc4a | 7867 | return true; |
3ea0a085 AM |
7868 | } |
7869 | ||
42cacb20 DE |
7870 | // Perform a relocation. |
7871 | ||
7872 | template<int size, bool big_endian> | |
7873 | inline bool | |
7874 | Target_powerpc<size, big_endian>::Relocate::relocate( | |
d83ce4e3 | 7875 | const Relocate_info<size, big_endian>* relinfo, |
91a65d2f | 7876 | unsigned int, |
d83ce4e3 AM |
7877 | Target_powerpc* target, |
7878 | Output_section* os, | |
7879 | size_t relnum, | |
91a65d2f | 7880 | const unsigned char* preloc, |
d83ce4e3 AM |
7881 | const Sized_symbol<size>* gsym, |
7882 | const Symbol_value<size>* psymval, | |
7883 | unsigned char* view, | |
c9269dff AM |
7884 | Address address, |
7885 | section_size_type view_size) | |
42cacb20 | 7886 | { |
0e804863 ILT |
7887 | if (view == NULL) |
7888 | return true; | |
7889 | ||
91a65d2f AM |
7890 | const elfcpp::Rela<size, big_endian> rela(preloc); |
7891 | unsigned int r_type = elfcpp::elf_r_type<size>(rela.get_r_info()); | |
e3deeb9c | 7892 | switch (this->maybe_skip_tls_get_addr_call(r_type, gsym)) |
dd93cd0a | 7893 | { |
e3deeb9c AM |
7894 | case Track_tls::NOT_EXPECTED: |
7895 | gold_error_at_location(relinfo, relnum, rela.get_r_offset(), | |
7896 | _("__tls_get_addr call lacks marker reloc")); | |
7897 | break; | |
7898 | case Track_tls::EXPECTED: | |
7899 | // We have already complained. | |
7900 | break; | |
7901 | case Track_tls::SKIP: | |
7902 | return true; | |
7903 | case Track_tls::NORMAL: | |
7904 | break; | |
dd93cd0a | 7905 | } |
dd93cd0a | 7906 | |
42cacb20 | 7907 | typedef Powerpc_relocate_functions<size, big_endian> Reloc; |
dd93cd0a | 7908 | typedef typename elfcpp::Swap<32, big_endian>::Valtype Insn; |
0e123f69 | 7909 | typedef typename elfcpp::Rela<size, big_endian> Reltype; |
dcfc7dd4 AM |
7910 | // Offset from start of insn to d-field reloc. |
7911 | const int d_offset = big_endian ? 2 : 0; | |
7912 | ||
3ea0a085 AM |
7913 | Powerpc_relobj<size, big_endian>* const object |
7914 | = static_cast<Powerpc_relobj<size, big_endian>*>(relinfo->object); | |
dd93cd0a | 7915 | Address value = 0; |
0cfb0717 | 7916 | bool has_stub_value = false; |
e5d5f5ed | 7917 | unsigned int r_sym = elfcpp::elf_r_sym<size>(rela.get_r_info()); |
b3ccdeb5 | 7918 | if ((gsym != NULL |
88b8e639 | 7919 | ? gsym->use_plt_offset(Scan::get_reference_flags(r_type, target)) |
b3ccdeb5 AM |
7920 | : object->local_has_plt_offset(r_sym)) |
7921 | && (!psymval->is_ifunc_symbol() | |
9055360d | 7922 | || Scan::reloc_needs_plt_for_ifunc(target, object, r_type, false))) |
dd93cd0a | 7923 | { |
9055360d AM |
7924 | if (size == 64 |
7925 | && gsym != NULL | |
7926 | && target->abiversion() >= 2 | |
7927 | && !parameters->options().output_is_position_independent() | |
7928 | && !is_branch_reloc(r_type)) | |
ec661b9d | 7929 | { |
faa2211d AM |
7930 | Address off = target->glink_section()->find_global_entry(gsym); |
7931 | if (off != invalid_address) | |
6ec65f28 AM |
7932 | { |
7933 | value = target->glink_section()->global_entry_address() + off; | |
7934 | has_stub_value = true; | |
7935 | } | |
ec661b9d | 7936 | } |
c9824451 | 7937 | else |
9055360d AM |
7938 | { |
7939 | Stub_table<size, big_endian>* stub_table | |
7940 | = object->stub_table(relinfo->data_shndx); | |
7941 | if (stub_table == NULL) | |
7942 | { | |
7943 | // This is a ref from a data section to an ifunc symbol. | |
7944 | if (target->stub_tables().size() != 0) | |
7945 | stub_table = target->stub_tables()[0]; | |
7946 | } | |
faa2211d AM |
7947 | if (stub_table != NULL) |
7948 | { | |
7e57d19e | 7949 | const typename Stub_table<size, big_endian>::Plt_stub_ent* ent; |
faa2211d | 7950 | if (gsym != NULL) |
7e57d19e | 7951 | ent = stub_table->find_plt_call_entry(object, gsym, r_type, |
faa2211d AM |
7952 | rela.get_r_addend()); |
7953 | else | |
7e57d19e | 7954 | ent = stub_table->find_plt_call_entry(object, r_sym, r_type, |
faa2211d | 7955 | rela.get_r_addend()); |
7e57d19e | 7956 | if (ent != NULL) |
faa2211d | 7957 | { |
7e57d19e AM |
7958 | value = stub_table->stub_address() + ent->off_; |
7959 | const int reloc_size = elfcpp::Elf_sizes<size>::rela_size; | |
7960 | elfcpp::Shdr<size, big_endian> shdr(relinfo->reloc_shdr); | |
7961 | size_t reloc_count = shdr.get_sh_size() / reloc_size; | |
7962 | if (size == 64 | |
7963 | && ent->r2save_ | |
7964 | && relnum + 1 < reloc_count) | |
7965 | { | |
7966 | Reltype next_rela(preloc + reloc_size); | |
7967 | if (elfcpp::elf_r_type<size>(next_rela.get_r_info()) | |
7968 | == elfcpp::R_PPC64_TOCSAVE | |
7969 | && next_rela.get_r_offset() == rela.get_r_offset() + 4) | |
7970 | value += 4; | |
7971 | } | |
faa2211d AM |
7972 | has_stub_value = true; |
7973 | } | |
7974 | } | |
9055360d | 7975 | } |
faa2211d AM |
7976 | // We don't care too much about bogus debug references to |
7977 | // non-local functions, but otherwise there had better be a plt | |
7978 | // call stub or global entry stub as appropriate. | |
7979 | gold_assert(has_stub_value || !(os->flags() & elfcpp::SHF_ALLOC)); | |
dd93cd0a | 7980 | } |
cf43a2fe AM |
7981 | |
7982 | if (r_type == elfcpp::R_POWERPC_GOT16 | |
7983 | || r_type == elfcpp::R_POWERPC_GOT16_LO | |
7984 | || r_type == elfcpp::R_POWERPC_GOT16_HI | |
7985 | || r_type == elfcpp::R_POWERPC_GOT16_HA | |
7986 | || r_type == elfcpp::R_PPC64_GOT16_DS | |
7987 | || r_type == elfcpp::R_PPC64_GOT16_LO_DS) | |
42cacb20 | 7988 | { |
cf43a2fe AM |
7989 | if (gsym != NULL) |
7990 | { | |
7991 | gold_assert(gsym->has_got_offset(GOT_TYPE_STANDARD)); | |
7992 | value = gsym->got_offset(GOT_TYPE_STANDARD); | |
7993 | } | |
7994 | else | |
7995 | { | |
cf43a2fe AM |
7996 | gold_assert(object->local_has_got_offset(r_sym, GOT_TYPE_STANDARD)); |
7997 | value = object->local_got_offset(r_sym, GOT_TYPE_STANDARD); | |
7998 | } | |
dd93cd0a | 7999 | value -= target->got_section()->got_base_offset(object); |
cf43a2fe AM |
8000 | } |
8001 | else if (r_type == elfcpp::R_PPC64_TOC) | |
8002 | { | |
c9269dff | 8003 | value = (target->got_section()->output_section()->address() |
dd93cd0a | 8004 | + object->toc_base_offset()); |
cf43a2fe AM |
8005 | } |
8006 | else if (gsym != NULL | |
8007 | && (r_type == elfcpp::R_POWERPC_REL24 | |
8008 | || r_type == elfcpp::R_PPC_PLTREL24) | |
0cfb0717 | 8009 | && has_stub_value) |
cf43a2fe | 8010 | { |
c9269dff AM |
8011 | if (size == 64) |
8012 | { | |
8013 | typedef typename elfcpp::Swap<32, big_endian>::Valtype Valtype; | |
8014 | Valtype* wv = reinterpret_cast<Valtype*>(view); | |
8015 | bool can_plt_call = false; | |
8016 | if (rela.get_r_offset() + 8 <= view_size) | |
8017 | { | |
3ea0a085 | 8018 | Valtype insn = elfcpp::Swap<32, big_endian>::readval(wv); |
c9269dff | 8019 | Valtype insn2 = elfcpp::Swap<32, big_endian>::readval(wv + 1); |
3ea0a085 AM |
8020 | if ((insn & 1) != 0 |
8021 | && (insn2 == nop | |
8022 | || insn2 == cror_15_15_15 || insn2 == cror_31_31_31)) | |
c9269dff | 8023 | { |
b4f7960d AM |
8024 | elfcpp::Swap<32, big_endian>:: |
8025 | writeval(wv + 1, ld_2_1 + target->stk_toc()); | |
c9269dff AM |
8026 | can_plt_call = true; |
8027 | } | |
8028 | } | |
8029 | if (!can_plt_call) | |
3ea0a085 AM |
8030 | { |
8031 | // If we don't have a branch and link followed by a nop, | |
8032 | // we can't go via the plt because there is no place to | |
8033 | // put a toc restoring instruction. | |
8034 | // Unless we know we won't be returning. | |
8035 | if (strcmp(gsym->name(), "__libc_start_main") == 0) | |
8036 | can_plt_call = true; | |
8037 | } | |
8038 | if (!can_plt_call) | |
8039 | { | |
ba8ca3e7 AM |
8040 | // g++ as of 20130507 emits self-calls without a |
8041 | // following nop. This is arguably wrong since we have | |
8042 | // conflicting information. On the one hand a global | |
8043 | // symbol and on the other a local call sequence, but | |
8044 | // don't error for this special case. | |
8045 | // It isn't possible to cheaply verify we have exactly | |
8046 | // such a call. Allow all calls to the same section. | |
3ea0a085 | 8047 | bool ok = false; |
c9824451 | 8048 | Address code = value; |
3ea0a085 AM |
8049 | if (gsym->source() == Symbol::FROM_OBJECT |
8050 | && gsym->object() == object) | |
8051 | { | |
9055360d AM |
8052 | unsigned int dest_shndx = 0; |
8053 | if (target->abiversion() < 2) | |
8054 | { | |
8055 | Address addend = rela.get_r_addend(); | |
1611bc4a AM |
8056 | code = psymval->value(object, addend); |
8057 | target->symval_for_branch(relinfo->symtab, gsym, object, | |
8058 | &code, &dest_shndx); | |
9055360d | 8059 | } |
3ea0a085 AM |
8060 | bool is_ordinary; |
8061 | if (dest_shndx == 0) | |
8062 | dest_shndx = gsym->shndx(&is_ordinary); | |
8063 | ok = dest_shndx == relinfo->data_shndx; | |
8064 | } | |
8065 | if (!ok) | |
c9824451 AM |
8066 | { |
8067 | gold_error_at_location(relinfo, relnum, rela.get_r_offset(), | |
8068 | _("call lacks nop, can't restore toc; " | |
8069 | "recompile with -fPIC")); | |
8070 | value = code; | |
8071 | } | |
3ea0a085 | 8072 | } |
c9269dff | 8073 | } |
cf43a2fe | 8074 | } |
dd93cd0a AM |
8075 | else if (r_type == elfcpp::R_POWERPC_GOT_TLSGD16 |
8076 | || r_type == elfcpp::R_POWERPC_GOT_TLSGD16_LO | |
8077 | || r_type == elfcpp::R_POWERPC_GOT_TLSGD16_HI | |
8078 | || r_type == elfcpp::R_POWERPC_GOT_TLSGD16_HA) | |
8079 | { | |
8080 | // First instruction of a global dynamic sequence, arg setup insn. | |
8081 | const bool final = gsym == NULL || gsym->final_value_is_known(); | |
8082 | const tls::Tls_optimization tls_type = target->optimize_tls_gd(final); | |
8083 | enum Got_type got_type = GOT_TYPE_STANDARD; | |
8084 | if (tls_type == tls::TLSOPT_NONE) | |
8085 | got_type = GOT_TYPE_TLSGD; | |
8086 | else if (tls_type == tls::TLSOPT_TO_IE) | |
8087 | got_type = GOT_TYPE_TPREL; | |
8088 | if (got_type != GOT_TYPE_STANDARD) | |
8089 | { | |
8090 | if (gsym != NULL) | |
8091 | { | |
8092 | gold_assert(gsym->has_got_offset(got_type)); | |
8093 | value = gsym->got_offset(got_type); | |
8094 | } | |
8095 | else | |
8096 | { | |
dd93cd0a AM |
8097 | gold_assert(object->local_has_got_offset(r_sym, got_type)); |
8098 | value = object->local_got_offset(r_sym, got_type); | |
8099 | } | |
8100 | value -= target->got_section()->got_base_offset(object); | |
8101 | } | |
8102 | if (tls_type == tls::TLSOPT_TO_IE) | |
8103 | { | |
8104 | if (r_type == elfcpp::R_POWERPC_GOT_TLSGD16 | |
8105 | || r_type == elfcpp::R_POWERPC_GOT_TLSGD16_LO) | |
8106 | { | |
dcfc7dd4 | 8107 | Insn* iview = reinterpret_cast<Insn*>(view - d_offset); |
dd93cd0a AM |
8108 | Insn insn = elfcpp::Swap<32, big_endian>::readval(iview); |
8109 | insn &= (1 << 26) - (1 << 16); // extract rt,ra from addi | |
8110 | if (size == 32) | |
8111 | insn |= 32 << 26; // lwz | |
8112 | else | |
8113 | insn |= 58 << 26; // ld | |
8114 | elfcpp::Swap<32, big_endian>::writeval(iview, insn); | |
8115 | } | |
8116 | r_type += (elfcpp::R_POWERPC_GOT_TPREL16 | |
8117 | - elfcpp::R_POWERPC_GOT_TLSGD16); | |
8118 | } | |
8119 | else if (tls_type == tls::TLSOPT_TO_LE) | |
8120 | { | |
8121 | if (r_type == elfcpp::R_POWERPC_GOT_TLSGD16 | |
8122 | || r_type == elfcpp::R_POWERPC_GOT_TLSGD16_LO) | |
8123 | { | |
dcfc7dd4 | 8124 | Insn* iview = reinterpret_cast<Insn*>(view - d_offset); |
0f81d3f0 AM |
8125 | Insn insn = elfcpp::Swap<32, big_endian>::readval(iview); |
8126 | insn &= (1 << 26) - (1 << 21); // extract rt | |
dd93cd0a | 8127 | if (size == 32) |
0f81d3f0 AM |
8128 | insn |= addis_0_2; |
8129 | else | |
8130 | insn |= addis_0_13; | |
dd93cd0a AM |
8131 | elfcpp::Swap<32, big_endian>::writeval(iview, insn); |
8132 | r_type = elfcpp::R_POWERPC_TPREL16_HA; | |
8133 | value = psymval->value(object, rela.get_r_addend()); | |
8134 | } | |
8135 | else | |
8136 | { | |
dcfc7dd4 | 8137 | Insn* iview = reinterpret_cast<Insn*>(view - d_offset); |
dd93cd0a AM |
8138 | Insn insn = nop; |
8139 | elfcpp::Swap<32, big_endian>::writeval(iview, insn); | |
8140 | r_type = elfcpp::R_POWERPC_NONE; | |
8141 | } | |
8142 | } | |
8143 | } | |
8144 | else if (r_type == elfcpp::R_POWERPC_GOT_TLSLD16 | |
8145 | || r_type == elfcpp::R_POWERPC_GOT_TLSLD16_LO | |
8146 | || r_type == elfcpp::R_POWERPC_GOT_TLSLD16_HI | |
8147 | || r_type == elfcpp::R_POWERPC_GOT_TLSLD16_HA) | |
8148 | { | |
8149 | // First instruction of a local dynamic sequence, arg setup insn. | |
8150 | const tls::Tls_optimization tls_type = target->optimize_tls_ld(); | |
8151 | if (tls_type == tls::TLSOPT_NONE) | |
8152 | { | |
8153 | value = target->tlsld_got_offset(); | |
8154 | value -= target->got_section()->got_base_offset(object); | |
8155 | } | |
8156 | else | |
8157 | { | |
8158 | gold_assert(tls_type == tls::TLSOPT_TO_LE); | |
8159 | if (r_type == elfcpp::R_POWERPC_GOT_TLSLD16 | |
8160 | || r_type == elfcpp::R_POWERPC_GOT_TLSLD16_LO) | |
8161 | { | |
dcfc7dd4 | 8162 | Insn* iview = reinterpret_cast<Insn*>(view - d_offset); |
0f81d3f0 AM |
8163 | Insn insn = elfcpp::Swap<32, big_endian>::readval(iview); |
8164 | insn &= (1 << 26) - (1 << 21); // extract rt | |
dd93cd0a | 8165 | if (size == 32) |
0f81d3f0 AM |
8166 | insn |= addis_0_2; |
8167 | else | |
8168 | insn |= addis_0_13; | |
dd93cd0a AM |
8169 | elfcpp::Swap<32, big_endian>::writeval(iview, insn); |
8170 | r_type = elfcpp::R_POWERPC_TPREL16_HA; | |
7404fe1b | 8171 | value = dtp_offset; |
dd93cd0a AM |
8172 | } |
8173 | else | |
8174 | { | |
dcfc7dd4 | 8175 | Insn* iview = reinterpret_cast<Insn*>(view - d_offset); |
dd93cd0a AM |
8176 | Insn insn = nop; |
8177 | elfcpp::Swap<32, big_endian>::writeval(iview, insn); | |
8178 | r_type = elfcpp::R_POWERPC_NONE; | |
8179 | } | |
8180 | } | |
8181 | } | |
8182 | else if (r_type == elfcpp::R_POWERPC_GOT_DTPREL16 | |
8183 | || r_type == elfcpp::R_POWERPC_GOT_DTPREL16_LO | |
8184 | || r_type == elfcpp::R_POWERPC_GOT_DTPREL16_HI | |
8185 | || r_type == elfcpp::R_POWERPC_GOT_DTPREL16_HA) | |
8186 | { | |
8187 | // Accesses relative to a local dynamic sequence address, | |
8188 | // no optimisation here. | |
8189 | if (gsym != NULL) | |
8190 | { | |
8191 | gold_assert(gsym->has_got_offset(GOT_TYPE_DTPREL)); | |
8192 | value = gsym->got_offset(GOT_TYPE_DTPREL); | |
8193 | } | |
8194 | else | |
8195 | { | |
dd93cd0a AM |
8196 | gold_assert(object->local_has_got_offset(r_sym, GOT_TYPE_DTPREL)); |
8197 | value = object->local_got_offset(r_sym, GOT_TYPE_DTPREL); | |
8198 | } | |
8199 | value -= target->got_section()->got_base_offset(object); | |
8200 | } | |
8201 | else if (r_type == elfcpp::R_POWERPC_GOT_TPREL16 | |
8202 | || r_type == elfcpp::R_POWERPC_GOT_TPREL16_LO | |
8203 | || r_type == elfcpp::R_POWERPC_GOT_TPREL16_HI | |
8204 | || r_type == elfcpp::R_POWERPC_GOT_TPREL16_HA) | |
8205 | { | |
8206 | // First instruction of initial exec sequence. | |
8207 | const bool final = gsym == NULL || gsym->final_value_is_known(); | |
8208 | const tls::Tls_optimization tls_type = target->optimize_tls_ie(final); | |
8209 | if (tls_type == tls::TLSOPT_NONE) | |
8210 | { | |
8211 | if (gsym != NULL) | |
8212 | { | |
8213 | gold_assert(gsym->has_got_offset(GOT_TYPE_TPREL)); | |
8214 | value = gsym->got_offset(GOT_TYPE_TPREL); | |
8215 | } | |
8216 | else | |
8217 | { | |
dd93cd0a AM |
8218 | gold_assert(object->local_has_got_offset(r_sym, GOT_TYPE_TPREL)); |
8219 | value = object->local_got_offset(r_sym, GOT_TYPE_TPREL); | |
8220 | } | |
8221 | value -= target->got_section()->got_base_offset(object); | |
8222 | } | |
8223 | else | |
8224 | { | |
8225 | gold_assert(tls_type == tls::TLSOPT_TO_LE); | |
8226 | if (r_type == elfcpp::R_POWERPC_GOT_TPREL16 | |
8227 | || r_type == elfcpp::R_POWERPC_GOT_TPREL16_LO) | |
8228 | { | |
dcfc7dd4 | 8229 | Insn* iview = reinterpret_cast<Insn*>(view - d_offset); |
dd93cd0a AM |
8230 | Insn insn = elfcpp::Swap<32, big_endian>::readval(iview); |
8231 | insn &= (1 << 26) - (1 << 21); // extract rt from ld | |
8232 | if (size == 32) | |
8233 | insn |= addis_0_2; | |
8234 | else | |
8235 | insn |= addis_0_13; | |
8236 | elfcpp::Swap<32, big_endian>::writeval(iview, insn); | |
8237 | r_type = elfcpp::R_POWERPC_TPREL16_HA; | |
8238 | value = psymval->value(object, rela.get_r_addend()); | |
8239 | } | |
8240 | else | |
8241 | { | |
dcfc7dd4 | 8242 | Insn* iview = reinterpret_cast<Insn*>(view - d_offset); |
dd93cd0a AM |
8243 | Insn insn = nop; |
8244 | elfcpp::Swap<32, big_endian>::writeval(iview, insn); | |
8245 | r_type = elfcpp::R_POWERPC_NONE; | |
8246 | } | |
8247 | } | |
8248 | } | |
8249 | else if ((size == 64 && r_type == elfcpp::R_PPC64_TLSGD) | |
8250 | || (size == 32 && r_type == elfcpp::R_PPC_TLSGD)) | |
8251 | { | |
8252 | // Second instruction of a global dynamic sequence, | |
8253 | // the __tls_get_addr call | |
e3deeb9c | 8254 | this->expect_tls_get_addr_call(relinfo, relnum, rela.get_r_offset()); |
dd93cd0a AM |
8255 | const bool final = gsym == NULL || gsym->final_value_is_known(); |
8256 | const tls::Tls_optimization tls_type = target->optimize_tls_gd(final); | |
8257 | if (tls_type != tls::TLSOPT_NONE) | |
8258 | { | |
8259 | if (tls_type == tls::TLSOPT_TO_IE) | |
8260 | { | |
8261 | Insn* iview = reinterpret_cast<Insn*>(view); | |
8262 | Insn insn = add_3_3_13; | |
8263 | if (size == 32) | |
8264 | insn = add_3_3_2; | |
8265 | elfcpp::Swap<32, big_endian>::writeval(iview, insn); | |
8266 | r_type = elfcpp::R_POWERPC_NONE; | |
8267 | } | |
8268 | else | |
8269 | { | |
8270 | Insn* iview = reinterpret_cast<Insn*>(view); | |
8271 | Insn insn = addi_3_3; | |
8272 | elfcpp::Swap<32, big_endian>::writeval(iview, insn); | |
8273 | r_type = elfcpp::R_POWERPC_TPREL16_LO; | |
dcfc7dd4 | 8274 | view += d_offset; |
dd93cd0a AM |
8275 | value = psymval->value(object, rela.get_r_addend()); |
8276 | } | |
e3deeb9c | 8277 | this->skip_next_tls_get_addr_call(); |
dd93cd0a AM |
8278 | } |
8279 | } | |
8280 | else if ((size == 64 && r_type == elfcpp::R_PPC64_TLSLD) | |
8281 | || (size == 32 && r_type == elfcpp::R_PPC_TLSLD)) | |
8282 | { | |
8283 | // Second instruction of a local dynamic sequence, | |
8284 | // the __tls_get_addr call | |
e3deeb9c | 8285 | this->expect_tls_get_addr_call(relinfo, relnum, rela.get_r_offset()); |
dd93cd0a AM |
8286 | const tls::Tls_optimization tls_type = target->optimize_tls_ld(); |
8287 | if (tls_type == tls::TLSOPT_TO_LE) | |
8288 | { | |
8289 | Insn* iview = reinterpret_cast<Insn*>(view); | |
8290 | Insn insn = addi_3_3; | |
8291 | elfcpp::Swap<32, big_endian>::writeval(iview, insn); | |
e3deeb9c | 8292 | this->skip_next_tls_get_addr_call(); |
dd93cd0a | 8293 | r_type = elfcpp::R_POWERPC_TPREL16_LO; |
dcfc7dd4 | 8294 | view += d_offset; |
7404fe1b | 8295 | value = dtp_offset; |
dd93cd0a AM |
8296 | } |
8297 | } | |
8298 | else if (r_type == elfcpp::R_POWERPC_TLS) | |
8299 | { | |
8300 | // Second instruction of an initial exec sequence | |
8301 | const bool final = gsym == NULL || gsym->final_value_is_known(); | |
8302 | const tls::Tls_optimization tls_type = target->optimize_tls_ie(final); | |
8303 | if (tls_type == tls::TLSOPT_TO_LE) | |
8304 | { | |
8305 | Insn* iview = reinterpret_cast<Insn*>(view); | |
8306 | Insn insn = elfcpp::Swap<32, big_endian>::readval(iview); | |
8307 | unsigned int reg = size == 32 ? 2 : 13; | |
8308 | insn = at_tls_transform(insn, reg); | |
8309 | gold_assert(insn != 0); | |
8310 | elfcpp::Swap<32, big_endian>::writeval(iview, insn); | |
8311 | r_type = elfcpp::R_POWERPC_TPREL16_LO; | |
dcfc7dd4 | 8312 | view += d_offset; |
dd93cd0a AM |
8313 | value = psymval->value(object, rela.get_r_addend()); |
8314 | } | |
8315 | } | |
0cfb0717 | 8316 | else if (!has_stub_value) |
cf43a2fe | 8317 | { |
dd93cd0a | 8318 | Address addend = 0; |
cbcb23fa | 8319 | if (!(size == 32 && r_type == elfcpp::R_PPC_PLTREL24)) |
cf43a2fe | 8320 | addend = rela.get_r_addend(); |
c9824451 | 8321 | value = psymval->value(object, addend); |
dd93cd0a | 8322 | if (size == 64 && is_branch_reloc(r_type)) |
9055360d AM |
8323 | { |
8324 | if (target->abiversion() >= 2) | |
8325 | { | |
8326 | if (gsym != NULL) | |
8327 | value += object->ppc64_local_entry_offset(gsym); | |
8328 | else | |
8329 | value += object->ppc64_local_entry_offset(r_sym); | |
8330 | } | |
8331 | else | |
1611bc4a AM |
8332 | { |
8333 | unsigned int dest_shndx; | |
8334 | target->symval_for_branch(relinfo->symtab, gsym, object, | |
8335 | &value, &dest_shndx); | |
8336 | } | |
9055360d | 8337 | } |
cbcb23fa | 8338 | Address max_branch_offset = max_branch_delta(r_type); |
ec661b9d AM |
8339 | if (max_branch_offset != 0 |
8340 | && value - address + max_branch_offset >= 2 * max_branch_offset) | |
8341 | { | |
8342 | Stub_table<size, big_endian>* stub_table | |
8343 | = object->stub_table(relinfo->data_shndx); | |
0cfdc767 AM |
8344 | if (stub_table != NULL) |
8345 | { | |
8346 | Address off = stub_table->find_long_branch_entry(object, value); | |
8347 | if (off != invalid_address) | |
0cfb0717 AM |
8348 | { |
8349 | value = (stub_table->stub_address() + stub_table->plt_size() | |
8350 | + off); | |
8351 | has_stub_value = true; | |
8352 | } | |
0cfdc767 | 8353 | } |
ec661b9d | 8354 | } |
42cacb20 DE |
8355 | } |
8356 | ||
42cacb20 DE |
8357 | switch (r_type) |
8358 | { | |
dd93cd0a AM |
8359 | case elfcpp::R_PPC64_REL64: |
8360 | case elfcpp::R_POWERPC_REL32: | |
8361 | case elfcpp::R_POWERPC_REL24: | |
8362 | case elfcpp::R_PPC_PLTREL24: | |
8363 | case elfcpp::R_PPC_LOCAL24PC: | |
8364 | case elfcpp::R_POWERPC_REL16: | |
8365 | case elfcpp::R_POWERPC_REL16_LO: | |
8366 | case elfcpp::R_POWERPC_REL16_HI: | |
8367 | case elfcpp::R_POWERPC_REL16_HA: | |
a680de9a | 8368 | case elfcpp::R_POWERPC_REL16DX_HA: |
dd93cd0a AM |
8369 | case elfcpp::R_POWERPC_REL14: |
8370 | case elfcpp::R_POWERPC_REL14_BRTAKEN: | |
8371 | case elfcpp::R_POWERPC_REL14_BRNTAKEN: | |
8372 | value -= address; | |
8373 | break; | |
8374 | ||
42cacb20 DE |
8375 | case elfcpp::R_PPC64_TOC16: |
8376 | case elfcpp::R_PPC64_TOC16_LO: | |
8377 | case elfcpp::R_PPC64_TOC16_HI: | |
8378 | case elfcpp::R_PPC64_TOC16_HA: | |
8379 | case elfcpp::R_PPC64_TOC16_DS: | |
8380 | case elfcpp::R_PPC64_TOC16_LO_DS: | |
cf43a2fe | 8381 | // Subtract the TOC base address. |
c9269dff | 8382 | value -= (target->got_section()->output_section()->address() |
dd93cd0a | 8383 | + object->toc_base_offset()); |
42cacb20 DE |
8384 | break; |
8385 | ||
cf43a2fe AM |
8386 | case elfcpp::R_POWERPC_SECTOFF: |
8387 | case elfcpp::R_POWERPC_SECTOFF_LO: | |
8388 | case elfcpp::R_POWERPC_SECTOFF_HI: | |
8389 | case elfcpp::R_POWERPC_SECTOFF_HA: | |
8390 | case elfcpp::R_PPC64_SECTOFF_DS: | |
8391 | case elfcpp::R_PPC64_SECTOFF_LO_DS: | |
8392 | if (os != NULL) | |
8393 | value -= os->address(); | |
42cacb20 DE |
8394 | break; |
8395 | ||
dd93cd0a AM |
8396 | case elfcpp::R_PPC64_TPREL16_DS: |
8397 | case elfcpp::R_PPC64_TPREL16_LO_DS: | |
f9c6b907 AM |
8398 | case elfcpp::R_PPC64_TPREL16_HIGH: |
8399 | case elfcpp::R_PPC64_TPREL16_HIGHA: | |
dd93cd0a | 8400 | if (size != 64) |
f9c6b907 | 8401 | // R_PPC_TLSGD, R_PPC_TLSLD, R_PPC_EMB_RELST_LO, R_PPC_EMB_RELST_HI |
dd93cd0a | 8402 | break; |
d8e90251 | 8403 | // Fall through. |
dd93cd0a AM |
8404 | case elfcpp::R_POWERPC_TPREL16: |
8405 | case elfcpp::R_POWERPC_TPREL16_LO: | |
8406 | case elfcpp::R_POWERPC_TPREL16_HI: | |
8407 | case elfcpp::R_POWERPC_TPREL16_HA: | |
8408 | case elfcpp::R_POWERPC_TPREL: | |
8409 | case elfcpp::R_PPC64_TPREL16_HIGHER: | |
8410 | case elfcpp::R_PPC64_TPREL16_HIGHERA: | |
8411 | case elfcpp::R_PPC64_TPREL16_HIGHEST: | |
8412 | case elfcpp::R_PPC64_TPREL16_HIGHESTA: | |
8413 | // tls symbol values are relative to tls_segment()->vaddr() | |
8414 | value -= tp_offset; | |
8415 | break; | |
8416 | ||
8417 | case elfcpp::R_PPC64_DTPREL16_DS: | |
8418 | case elfcpp::R_PPC64_DTPREL16_LO_DS: | |
8419 | case elfcpp::R_PPC64_DTPREL16_HIGHER: | |
8420 | case elfcpp::R_PPC64_DTPREL16_HIGHERA: | |
8421 | case elfcpp::R_PPC64_DTPREL16_HIGHEST: | |
8422 | case elfcpp::R_PPC64_DTPREL16_HIGHESTA: | |
8423 | if (size != 64) | |
8424 | // R_PPC_EMB_NADDR32, R_PPC_EMB_NADDR16, R_PPC_EMB_NADDR16_LO | |
8425 | // R_PPC_EMB_NADDR16_HI, R_PPC_EMB_NADDR16_HA, R_PPC_EMB_SDAI16 | |
8426 | break; | |
d8e90251 | 8427 | // Fall through. |
dd93cd0a AM |
8428 | case elfcpp::R_POWERPC_DTPREL16: |
8429 | case elfcpp::R_POWERPC_DTPREL16_LO: | |
8430 | case elfcpp::R_POWERPC_DTPREL16_HI: | |
8431 | case elfcpp::R_POWERPC_DTPREL16_HA: | |
8432 | case elfcpp::R_POWERPC_DTPREL: | |
f9c6b907 AM |
8433 | case elfcpp::R_PPC64_DTPREL16_HIGH: |
8434 | case elfcpp::R_PPC64_DTPREL16_HIGHA: | |
dd93cd0a AM |
8435 | // tls symbol values are relative to tls_segment()->vaddr() |
8436 | value -= dtp_offset; | |
8437 | break; | |
8438 | ||
45965137 AM |
8439 | case elfcpp::R_PPC64_ADDR64_LOCAL: |
8440 | if (gsym != NULL) | |
8441 | value += object->ppc64_local_entry_offset(gsym); | |
8442 | else | |
8443 | value += object->ppc64_local_entry_offset(r_sym); | |
8444 | break; | |
8445 | ||
42cacb20 DE |
8446 | default: |
8447 | break; | |
8448 | } | |
8449 | ||
dd93cd0a | 8450 | Insn branch_bit = 0; |
42cacb20 DE |
8451 | switch (r_type) |
8452 | { | |
dd93cd0a AM |
8453 | case elfcpp::R_POWERPC_ADDR14_BRTAKEN: |
8454 | case elfcpp::R_POWERPC_REL14_BRTAKEN: | |
8455 | branch_bit = 1 << 21; | |
d8e90251 | 8456 | // Fall through. |
dd93cd0a AM |
8457 | case elfcpp::R_POWERPC_ADDR14_BRNTAKEN: |
8458 | case elfcpp::R_POWERPC_REL14_BRNTAKEN: | |
8459 | { | |
8460 | Insn* iview = reinterpret_cast<Insn*>(view); | |
8461 | Insn insn = elfcpp::Swap<32, big_endian>::readval(iview); | |
8462 | insn &= ~(1 << 21); | |
8463 | insn |= branch_bit; | |
8464 | if (this->is_isa_v2) | |
8465 | { | |
8466 | // Set 'a' bit. This is 0b00010 in BO field for branch | |
8467 | // on CR(BI) insns (BO == 001at or 011at), and 0b01000 | |
8468 | // for branch on CTR insns (BO == 1a00t or 1a01t). | |
8469 | if ((insn & (0x14 << 21)) == (0x04 << 21)) | |
8470 | insn |= 0x02 << 21; | |
8471 | else if ((insn & (0x14 << 21)) == (0x10 << 21)) | |
8472 | insn |= 0x08 << 21; | |
8473 | else | |
8474 | break; | |
8475 | } | |
8476 | else | |
8477 | { | |
8478 | // Invert 'y' bit if not the default. | |
8479 | if (static_cast<Signed_address>(value) < 0) | |
8480 | insn ^= 1 << 21; | |
8481 | } | |
8482 | elfcpp::Swap<32, big_endian>::writeval(iview, insn); | |
8483 | } | |
8484 | break; | |
8485 | ||
8486 | default: | |
8487 | break; | |
8488 | } | |
8489 | ||
aba6bc71 AM |
8490 | if (size == 64) |
8491 | { | |
aba6bc71 AM |
8492 | switch (r_type) |
8493 | { | |
8494 | default: | |
8495 | break; | |
8496 | ||
5edad15d AM |
8497 | // Multi-instruction sequences that access the GOT/TOC can |
8498 | // be optimized, eg. | |
8499 | // addis ra,r2,x@got@ha; ld rb,x@got@l(ra); | |
8500 | // to addis ra,r2,x@toc@ha; addi rb,ra,x@toc@l; | |
8501 | // and | |
8502 | // addis ra,r2,0; addi rb,ra,x@toc@l; | |
8503 | // to nop; addi rb,r2,x@toc; | |
8504 | // FIXME: the @got sequence shown above is not yet | |
8505 | // optimized. Note that gcc as of 2017-01-07 doesn't use | |
8506 | // the ELF @got relocs except for TLS, instead using the | |
8507 | // PowerOpen variant of a compiler managed GOT (called TOC). | |
8508 | // The PowerOpen TOC sequence equivalent to the first | |
8509 | // example is optimized. | |
aba6bc71 AM |
8510 | case elfcpp::R_POWERPC_GOT_TLSLD16_HA: |
8511 | case elfcpp::R_POWERPC_GOT_TLSGD16_HA: | |
8512 | case elfcpp::R_POWERPC_GOT_TPREL16_HA: | |
8513 | case elfcpp::R_POWERPC_GOT_DTPREL16_HA: | |
8514 | case elfcpp::R_POWERPC_GOT16_HA: | |
8515 | case elfcpp::R_PPC64_TOC16_HA: | |
d8f5a274 | 8516 | if (parameters->options().toc_optimize()) |
aba6bc71 | 8517 | { |
dcfc7dd4 | 8518 | Insn* iview = reinterpret_cast<Insn*>(view - d_offset); |
aba6bc71 | 8519 | Insn insn = elfcpp::Swap<32, big_endian>::readval(iview); |
5edad15d AM |
8520 | if (r_type == elfcpp::R_PPC64_TOC16_HA |
8521 | && object->make_toc_relative(target, &value)) | |
8522 | { | |
8523 | gold_assert((insn & ((0x3f << 26) | 0x1f << 16)) | |
8524 | == ((15u << 26) | (2 << 16))); | |
8525 | } | |
8526 | if (((insn & ((0x3f << 26) | 0x1f << 16)) | |
8527 | == ((15u << 26) | (2 << 16)) /* addis rt,2,imm */) | |
8528 | && value + 0x8000 < 0x10000) | |
aba6bc71 AM |
8529 | { |
8530 | elfcpp::Swap<32, big_endian>::writeval(iview, nop); | |
8531 | return true; | |
8532 | } | |
8533 | } | |
8534 | break; | |
8535 | ||
8536 | case elfcpp::R_POWERPC_GOT_TLSLD16_LO: | |
8537 | case elfcpp::R_POWERPC_GOT_TLSGD16_LO: | |
8538 | case elfcpp::R_POWERPC_GOT_TPREL16_LO: | |
8539 | case elfcpp::R_POWERPC_GOT_DTPREL16_LO: | |
8540 | case elfcpp::R_POWERPC_GOT16_LO: | |
8541 | case elfcpp::R_PPC64_GOT16_LO_DS: | |
8542 | case elfcpp::R_PPC64_TOC16_LO: | |
8543 | case elfcpp::R_PPC64_TOC16_LO_DS: | |
d8f5a274 | 8544 | if (parameters->options().toc_optimize()) |
aba6bc71 | 8545 | { |
dcfc7dd4 | 8546 | Insn* iview = reinterpret_cast<Insn*>(view - d_offset); |
aba6bc71 | 8547 | Insn insn = elfcpp::Swap<32, big_endian>::readval(iview); |
5edad15d AM |
8548 | bool changed = false; |
8549 | if (r_type == elfcpp::R_PPC64_TOC16_LO_DS | |
8550 | && object->make_toc_relative(target, &value)) | |
8551 | { | |
8552 | gold_assert ((insn & (0x3f << 26)) == 58u << 26 /* ld */); | |
8553 | insn ^= (14u << 26) ^ (58u << 26); | |
8554 | r_type = elfcpp::R_PPC64_TOC16_LO; | |
8555 | changed = true; | |
8556 | } | |
8557 | if (ok_lo_toc_insn(insn, r_type) | |
8558 | && value + 0x8000 < 0x10000) | |
aba6bc71 AM |
8559 | { |
8560 | if ((insn & (0x3f << 26)) == 12u << 26 /* addic */) | |
8561 | { | |
8562 | // Transform addic to addi when we change reg. | |
8563 | insn &= ~((0x3f << 26) | (0x1f << 16)); | |
8564 | insn |= (14u << 26) | (2 << 16); | |
8565 | } | |
8566 | else | |
8567 | { | |
8568 | insn &= ~(0x1f << 16); | |
8569 | insn |= 2 << 16; | |
8570 | } | |
5edad15d | 8571 | changed = true; |
aba6bc71 | 8572 | } |
5edad15d AM |
8573 | if (changed) |
8574 | elfcpp::Swap<32, big_endian>::writeval(iview, insn); | |
aba6bc71 AM |
8575 | } |
8576 | break; | |
549dba71 AM |
8577 | |
8578 | case elfcpp::R_PPC64_ENTRY: | |
8579 | value = (target->got_section()->output_section()->address() | |
8580 | + object->toc_base_offset()); | |
8581 | if (value + 0x80008000 <= 0xffffffff | |
8582 | && !parameters->options().output_is_position_independent()) | |
8583 | { | |
8584 | Insn* iview = reinterpret_cast<Insn*>(view); | |
8585 | Insn insn1 = elfcpp::Swap<32, big_endian>::readval(iview); | |
8586 | Insn insn2 = elfcpp::Swap<32, big_endian>::readval(iview + 1); | |
8587 | ||
8588 | if ((insn1 & ~0xfffc) == ld_2_12 | |
8589 | && insn2 == add_2_2_12) | |
8590 | { | |
8591 | insn1 = lis_2 + ha(value); | |
8592 | elfcpp::Swap<32, big_endian>::writeval(iview, insn1); | |
8593 | insn2 = addi_2_2 + l(value); | |
8594 | elfcpp::Swap<32, big_endian>::writeval(iview + 1, insn2); | |
8595 | return true; | |
8596 | } | |
8597 | } | |
8598 | else | |
8599 | { | |
8600 | value -= address; | |
8601 | if (value + 0x80008000 <= 0xffffffff) | |
8602 | { | |
8603 | Insn* iview = reinterpret_cast<Insn*>(view); | |
8604 | Insn insn1 = elfcpp::Swap<32, big_endian>::readval(iview); | |
8605 | Insn insn2 = elfcpp::Swap<32, big_endian>::readval(iview + 1); | |
8606 | ||
8607 | if ((insn1 & ~0xfffc) == ld_2_12 | |
8608 | && insn2 == add_2_2_12) | |
8609 | { | |
8610 | insn1 = addis_2_12 + ha(value); | |
8611 | elfcpp::Swap<32, big_endian>::writeval(iview, insn1); | |
8612 | insn2 = addi_2_2 + l(value); | |
8613 | elfcpp::Swap<32, big_endian>::writeval(iview + 1, insn2); | |
8614 | return true; | |
8615 | } | |
8616 | } | |
8617 | } | |
8618 | break; | |
e3a7574e AM |
8619 | |
8620 | case elfcpp::R_POWERPC_REL16_LO: | |
8621 | // If we are generating a non-PIC executable, edit | |
8622 | // 0: addis 2,12,.TOC.-0b@ha | |
8623 | // addi 2,2,.TOC.-0b@l | |
8624 | // used by ELFv2 global entry points to set up r2, to | |
8625 | // lis 2,.TOC.@ha | |
8626 | // addi 2,2,.TOC.@l | |
8627 | // if .TOC. is in range. */ | |
8628 | if (value + address - 4 + 0x80008000 <= 0xffffffff | |
8629 | && relnum != 0 | |
8630 | && preloc != NULL | |
8631 | && target->abiversion() >= 2 | |
8632 | && !parameters->options().output_is_position_independent() | |
4f038ee5 | 8633 | && rela.get_r_addend() == d_offset + 4 |
e3a7574e AM |
8634 | && gsym != NULL |
8635 | && strcmp(gsym->name(), ".TOC.") == 0) | |
8636 | { | |
0e123f69 | 8637 | const int reloc_size = elfcpp::Elf_sizes<size>::rela_size; |
e3a7574e AM |
8638 | Reltype prev_rela(preloc - reloc_size); |
8639 | if ((prev_rela.get_r_info() | |
8640 | == elfcpp::elf_r_info<size>(r_sym, | |
8641 | elfcpp::R_POWERPC_REL16_HA)) | |
8642 | && prev_rela.get_r_offset() + 4 == rela.get_r_offset() | |
8643 | && prev_rela.get_r_addend() + 4 == rela.get_r_addend()) | |
8644 | { | |
dcfc7dd4 | 8645 | Insn* iview = reinterpret_cast<Insn*>(view - d_offset); |
e3a7574e AM |
8646 | Insn insn1 = elfcpp::Swap<32, big_endian>::readval(iview - 1); |
8647 | Insn insn2 = elfcpp::Swap<32, big_endian>::readval(iview); | |
8648 | ||
8649 | if ((insn1 & 0xffff0000) == addis_2_12 | |
8650 | && (insn2 & 0xffff0000) == addi_2_2) | |
8651 | { | |
8652 | insn1 = lis_2 + ha(value + address - 4); | |
8653 | elfcpp::Swap<32, big_endian>::writeval(iview - 1, insn1); | |
8654 | insn2 = addi_2_2 + l(value + address - 4); | |
8655 | elfcpp::Swap<32, big_endian>::writeval(iview, insn2); | |
8656 | if (relinfo->rr) | |
8657 | { | |
8658 | relinfo->rr->set_strategy(relnum - 1, | |
8659 | Relocatable_relocs::RELOC_SPECIAL); | |
8660 | relinfo->rr->set_strategy(relnum, | |
8661 | Relocatable_relocs::RELOC_SPECIAL); | |
8662 | } | |
8663 | return true; | |
8664 | } | |
8665 | } | |
8666 | } | |
8667 | break; | |
aba6bc71 AM |
8668 | } |
8669 | } | |
8670 | ||
f4baf0d4 | 8671 | typename Reloc::Overflow_check overflow = Reloc::CHECK_NONE; |
b80eed39 | 8672 | elfcpp::Shdr<size, big_endian> shdr(relinfo->data_shdr); |
dd93cd0a AM |
8673 | switch (r_type) |
8674 | { | |
8675 | case elfcpp::R_POWERPC_ADDR32: | |
8676 | case elfcpp::R_POWERPC_UADDR32: | |
8677 | if (size == 64) | |
f4baf0d4 | 8678 | overflow = Reloc::CHECK_BITFIELD; |
42cacb20 DE |
8679 | break; |
8680 | ||
8681 | case elfcpp::R_POWERPC_REL32: | |
a680de9a | 8682 | case elfcpp::R_POWERPC_REL16DX_HA: |
dd93cd0a | 8683 | if (size == 64) |
f4baf0d4 | 8684 | overflow = Reloc::CHECK_SIGNED; |
dd93cd0a AM |
8685 | break; |
8686 | ||
dd93cd0a | 8687 | case elfcpp::R_POWERPC_UADDR16: |
f4baf0d4 | 8688 | overflow = Reloc::CHECK_BITFIELD; |
42cacb20 DE |
8689 | break; |
8690 | ||
b80eed39 AM |
8691 | case elfcpp::R_POWERPC_ADDR16: |
8692 | // We really should have three separate relocations, | |
8693 | // one for 16-bit data, one for insns with 16-bit signed fields, | |
8694 | // and one for insns with 16-bit unsigned fields. | |
8695 | overflow = Reloc::CHECK_BITFIELD; | |
8696 | if ((shdr.get_sh_flags() & elfcpp::SHF_EXECINSTR) != 0) | |
8697 | overflow = Reloc::CHECK_LOW_INSN; | |
8698 | break; | |
8699 | ||
f9c6b907 AM |
8700 | case elfcpp::R_POWERPC_ADDR16_HI: |
8701 | case elfcpp::R_POWERPC_ADDR16_HA: | |
8702 | case elfcpp::R_POWERPC_GOT16_HI: | |
8703 | case elfcpp::R_POWERPC_GOT16_HA: | |
8704 | case elfcpp::R_POWERPC_PLT16_HI: | |
8705 | case elfcpp::R_POWERPC_PLT16_HA: | |
8706 | case elfcpp::R_POWERPC_SECTOFF_HI: | |
8707 | case elfcpp::R_POWERPC_SECTOFF_HA: | |
8708 | case elfcpp::R_PPC64_TOC16_HI: | |
8709 | case elfcpp::R_PPC64_TOC16_HA: | |
8710 | case elfcpp::R_PPC64_PLTGOT16_HI: | |
8711 | case elfcpp::R_PPC64_PLTGOT16_HA: | |
8712 | case elfcpp::R_POWERPC_TPREL16_HI: | |
8713 | case elfcpp::R_POWERPC_TPREL16_HA: | |
8714 | case elfcpp::R_POWERPC_DTPREL16_HI: | |
8715 | case elfcpp::R_POWERPC_DTPREL16_HA: | |
8716 | case elfcpp::R_POWERPC_GOT_TLSGD16_HI: | |
8717 | case elfcpp::R_POWERPC_GOT_TLSGD16_HA: | |
8718 | case elfcpp::R_POWERPC_GOT_TLSLD16_HI: | |
8719 | case elfcpp::R_POWERPC_GOT_TLSLD16_HA: | |
8720 | case elfcpp::R_POWERPC_GOT_TPREL16_HI: | |
8721 | case elfcpp::R_POWERPC_GOT_TPREL16_HA: | |
8722 | case elfcpp::R_POWERPC_GOT_DTPREL16_HI: | |
8723 | case elfcpp::R_POWERPC_GOT_DTPREL16_HA: | |
8724 | case elfcpp::R_POWERPC_REL16_HI: | |
8725 | case elfcpp::R_POWERPC_REL16_HA: | |
b80eed39 AM |
8726 | if (size != 32) |
8727 | overflow = Reloc::CHECK_HIGH_INSN; | |
8728 | break; | |
8729 | ||
dd93cd0a AM |
8730 | case elfcpp::R_POWERPC_REL16: |
8731 | case elfcpp::R_PPC64_TOC16: | |
8732 | case elfcpp::R_POWERPC_GOT16: | |
8733 | case elfcpp::R_POWERPC_SECTOFF: | |
8734 | case elfcpp::R_POWERPC_TPREL16: | |
8735 | case elfcpp::R_POWERPC_DTPREL16: | |
b80eed39 AM |
8736 | case elfcpp::R_POWERPC_GOT_TLSGD16: |
8737 | case elfcpp::R_POWERPC_GOT_TLSLD16: | |
8738 | case elfcpp::R_POWERPC_GOT_TPREL16: | |
8739 | case elfcpp::R_POWERPC_GOT_DTPREL16: | |
8740 | overflow = Reloc::CHECK_LOW_INSN; | |
8741 | break; | |
8742 | ||
8743 | case elfcpp::R_POWERPC_ADDR24: | |
8744 | case elfcpp::R_POWERPC_ADDR14: | |
8745 | case elfcpp::R_POWERPC_ADDR14_BRTAKEN: | |
8746 | case elfcpp::R_POWERPC_ADDR14_BRNTAKEN: | |
8747 | case elfcpp::R_PPC64_ADDR16_DS: | |
8748 | case elfcpp::R_POWERPC_REL24: | |
8749 | case elfcpp::R_PPC_PLTREL24: | |
8750 | case elfcpp::R_PPC_LOCAL24PC: | |
dd93cd0a AM |
8751 | case elfcpp::R_PPC64_TPREL16_DS: |
8752 | case elfcpp::R_PPC64_DTPREL16_DS: | |
8753 | case elfcpp::R_PPC64_TOC16_DS: | |
8754 | case elfcpp::R_PPC64_GOT16_DS: | |
8755 | case elfcpp::R_PPC64_SECTOFF_DS: | |
8756 | case elfcpp::R_POWERPC_REL14: | |
8757 | case elfcpp::R_POWERPC_REL14_BRTAKEN: | |
8758 | case elfcpp::R_POWERPC_REL14_BRNTAKEN: | |
f4baf0d4 | 8759 | overflow = Reloc::CHECK_SIGNED; |
42cacb20 | 8760 | break; |
dd93cd0a | 8761 | } |
42cacb20 | 8762 | |
dcfc7dd4 | 8763 | Insn* iview = reinterpret_cast<Insn*>(view - d_offset); |
a680de9a PB |
8764 | Insn insn = 0; |
8765 | ||
b80eed39 AM |
8766 | if (overflow == Reloc::CHECK_LOW_INSN |
8767 | || overflow == Reloc::CHECK_HIGH_INSN) | |
8768 | { | |
a680de9a | 8769 | insn = elfcpp::Swap<32, big_endian>::readval(iview); |
b80eed39 | 8770 | |
a47622ac AM |
8771 | if ((insn & (0x3f << 26)) == 10u << 26 /* cmpli */) |
8772 | overflow = Reloc::CHECK_BITFIELD; | |
8773 | else if (overflow == Reloc::CHECK_LOW_INSN | |
8774 | ? ((insn & (0x3f << 26)) == 28u << 26 /* andi */ | |
8775 | || (insn & (0x3f << 26)) == 24u << 26 /* ori */ | |
8776 | || (insn & (0x3f << 26)) == 26u << 26 /* xori */) | |
8777 | : ((insn & (0x3f << 26)) == 29u << 26 /* andis */ | |
8778 | || (insn & (0x3f << 26)) == 25u << 26 /* oris */ | |
8779 | || (insn & (0x3f << 26)) == 27u << 26 /* xoris */)) | |
b80eed39 | 8780 | overflow = Reloc::CHECK_UNSIGNED; |
e30880c2 CC |
8781 | else |
8782 | overflow = Reloc::CHECK_SIGNED; | |
b80eed39 AM |
8783 | } |
8784 | ||
a680de9a | 8785 | bool maybe_dq_reloc = false; |
3ea0a085 | 8786 | typename Powerpc_relocate_functions<size, big_endian>::Status status |
f4baf0d4 | 8787 | = Powerpc_relocate_functions<size, big_endian>::STATUS_OK; |
dd93cd0a AM |
8788 | switch (r_type) |
8789 | { | |
8790 | case elfcpp::R_POWERPC_NONE: | |
8791 | case elfcpp::R_POWERPC_TLS: | |
8792 | case elfcpp::R_POWERPC_GNU_VTINHERIT: | |
8793 | case elfcpp::R_POWERPC_GNU_VTENTRY: | |
42cacb20 DE |
8794 | break; |
8795 | ||
8796 | case elfcpp::R_PPC64_ADDR64: | |
dd93cd0a | 8797 | case elfcpp::R_PPC64_REL64: |
cf43a2fe | 8798 | case elfcpp::R_PPC64_TOC: |
45965137 | 8799 | case elfcpp::R_PPC64_ADDR64_LOCAL: |
dd93cd0a AM |
8800 | Reloc::addr64(view, value); |
8801 | break; | |
8802 | ||
8803 | case elfcpp::R_POWERPC_TPREL: | |
8804 | case elfcpp::R_POWERPC_DTPREL: | |
8805 | if (size == 64) | |
8806 | Reloc::addr64(view, value); | |
8807 | else | |
3ea0a085 | 8808 | status = Reloc::addr32(view, value, overflow); |
dd93cd0a AM |
8809 | break; |
8810 | ||
8811 | case elfcpp::R_PPC64_UADDR64: | |
8812 | Reloc::addr64_u(view, value); | |
42cacb20 DE |
8813 | break; |
8814 | ||
8815 | case elfcpp::R_POWERPC_ADDR32: | |
3ea0a085 | 8816 | status = Reloc::addr32(view, value, overflow); |
dd93cd0a AM |
8817 | break; |
8818 | ||
acc276d8 | 8819 | case elfcpp::R_POWERPC_REL32: |
dd93cd0a | 8820 | case elfcpp::R_POWERPC_UADDR32: |
3ea0a085 | 8821 | status = Reloc::addr32_u(view, value, overflow); |
dd93cd0a AM |
8822 | break; |
8823 | ||
8824 | case elfcpp::R_POWERPC_ADDR24: | |
8825 | case elfcpp::R_POWERPC_REL24: | |
8826 | case elfcpp::R_PPC_PLTREL24: | |
8827 | case elfcpp::R_PPC_LOCAL24PC: | |
3ea0a085 | 8828 | status = Reloc::addr24(view, value, overflow); |
42cacb20 DE |
8829 | break; |
8830 | ||
dd93cd0a AM |
8831 | case elfcpp::R_POWERPC_GOT_DTPREL16: |
8832 | case elfcpp::R_POWERPC_GOT_DTPREL16_LO: | |
ec86f434 AM |
8833 | case elfcpp::R_POWERPC_GOT_TPREL16: |
8834 | case elfcpp::R_POWERPC_GOT_TPREL16_LO: | |
dd93cd0a AM |
8835 | if (size == 64) |
8836 | { | |
ec86f434 | 8837 | // On ppc64 these are all ds form |
a680de9a | 8838 | maybe_dq_reloc = true; |
dd93cd0a AM |
8839 | break; |
8840 | } | |
c25aa1e1 | 8841 | // Fall through. |
cf43a2fe | 8842 | case elfcpp::R_POWERPC_ADDR16: |
dd93cd0a | 8843 | case elfcpp::R_POWERPC_REL16: |
cf43a2fe | 8844 | case elfcpp::R_PPC64_TOC16: |
42cacb20 | 8845 | case elfcpp::R_POWERPC_GOT16: |
cf43a2fe | 8846 | case elfcpp::R_POWERPC_SECTOFF: |
dd93cd0a AM |
8847 | case elfcpp::R_POWERPC_TPREL16: |
8848 | case elfcpp::R_POWERPC_DTPREL16: | |
8849 | case elfcpp::R_POWERPC_GOT_TLSGD16: | |
8850 | case elfcpp::R_POWERPC_GOT_TLSLD16: | |
cf43a2fe | 8851 | case elfcpp::R_POWERPC_ADDR16_LO: |
dd93cd0a | 8852 | case elfcpp::R_POWERPC_REL16_LO: |
cf43a2fe | 8853 | case elfcpp::R_PPC64_TOC16_LO: |
42cacb20 | 8854 | case elfcpp::R_POWERPC_GOT16_LO: |
cf43a2fe | 8855 | case elfcpp::R_POWERPC_SECTOFF_LO: |
dd93cd0a AM |
8856 | case elfcpp::R_POWERPC_TPREL16_LO: |
8857 | case elfcpp::R_POWERPC_DTPREL16_LO: | |
8858 | case elfcpp::R_POWERPC_GOT_TLSGD16_LO: | |
8859 | case elfcpp::R_POWERPC_GOT_TLSLD16_LO: | |
a680de9a PB |
8860 | if (size == 64) |
8861 | status = Reloc::addr16(view, value, overflow); | |
8862 | else | |
8863 | maybe_dq_reloc = true; | |
dd93cd0a AM |
8864 | break; |
8865 | ||
8866 | case elfcpp::R_POWERPC_UADDR16: | |
3ea0a085 | 8867 | status = Reloc::addr16_u(view, value, overflow); |
42cacb20 DE |
8868 | break; |
8869 | ||
f9c6b907 AM |
8870 | case elfcpp::R_PPC64_ADDR16_HIGH: |
8871 | case elfcpp::R_PPC64_TPREL16_HIGH: | |
8872 | case elfcpp::R_PPC64_DTPREL16_HIGH: | |
8873 | if (size == 32) | |
8874 | // R_PPC_EMB_MRKREF, R_PPC_EMB_RELST_LO, R_PPC_EMB_RELST_HA | |
8875 | goto unsupp; | |
d8e90251 | 8876 | // Fall through. |
cf43a2fe | 8877 | case elfcpp::R_POWERPC_ADDR16_HI: |
dd93cd0a | 8878 | case elfcpp::R_POWERPC_REL16_HI: |
cf43a2fe | 8879 | case elfcpp::R_PPC64_TOC16_HI: |
42cacb20 | 8880 | case elfcpp::R_POWERPC_GOT16_HI: |
cf43a2fe | 8881 | case elfcpp::R_POWERPC_SECTOFF_HI: |
dd93cd0a AM |
8882 | case elfcpp::R_POWERPC_TPREL16_HI: |
8883 | case elfcpp::R_POWERPC_DTPREL16_HI: | |
8884 | case elfcpp::R_POWERPC_GOT_TLSGD16_HI: | |
8885 | case elfcpp::R_POWERPC_GOT_TLSLD16_HI: | |
8886 | case elfcpp::R_POWERPC_GOT_TPREL16_HI: | |
8887 | case elfcpp::R_POWERPC_GOT_DTPREL16_HI: | |
8888 | Reloc::addr16_hi(view, value); | |
42cacb20 DE |
8889 | break; |
8890 | ||
f9c6b907 AM |
8891 | case elfcpp::R_PPC64_ADDR16_HIGHA: |
8892 | case elfcpp::R_PPC64_TPREL16_HIGHA: | |
8893 | case elfcpp::R_PPC64_DTPREL16_HIGHA: | |
8894 | if (size == 32) | |
8895 | // R_PPC_EMB_RELSEC16, R_PPC_EMB_RELST_HI, R_PPC_EMB_BIT_FLD | |
8896 | goto unsupp; | |
d8e90251 | 8897 | // Fall through. |
cf43a2fe | 8898 | case elfcpp::R_POWERPC_ADDR16_HA: |
dd93cd0a | 8899 | case elfcpp::R_POWERPC_REL16_HA: |
cf43a2fe | 8900 | case elfcpp::R_PPC64_TOC16_HA: |
42cacb20 | 8901 | case elfcpp::R_POWERPC_GOT16_HA: |
cf43a2fe | 8902 | case elfcpp::R_POWERPC_SECTOFF_HA: |
dd93cd0a AM |
8903 | case elfcpp::R_POWERPC_TPREL16_HA: |
8904 | case elfcpp::R_POWERPC_DTPREL16_HA: | |
8905 | case elfcpp::R_POWERPC_GOT_TLSGD16_HA: | |
8906 | case elfcpp::R_POWERPC_GOT_TLSLD16_HA: | |
8907 | case elfcpp::R_POWERPC_GOT_TPREL16_HA: | |
8908 | case elfcpp::R_POWERPC_GOT_DTPREL16_HA: | |
8909 | Reloc::addr16_ha(view, value); | |
42cacb20 DE |
8910 | break; |
8911 | ||
a680de9a PB |
8912 | case elfcpp::R_POWERPC_REL16DX_HA: |
8913 | status = Reloc::addr16dx_ha(view, value, overflow); | |
8914 | break; | |
8915 | ||
dd93cd0a AM |
8916 | case elfcpp::R_PPC64_DTPREL16_HIGHER: |
8917 | if (size == 32) | |
8918 | // R_PPC_EMB_NADDR16_LO | |
8919 | goto unsupp; | |
d8e90251 | 8920 | // Fall through. |
dd93cd0a AM |
8921 | case elfcpp::R_PPC64_ADDR16_HIGHER: |
8922 | case elfcpp::R_PPC64_TPREL16_HIGHER: | |
8923 | Reloc::addr16_hi2(view, value); | |
42cacb20 DE |
8924 | break; |
8925 | ||
dd93cd0a AM |
8926 | case elfcpp::R_PPC64_DTPREL16_HIGHERA: |
8927 | if (size == 32) | |
8928 | // R_PPC_EMB_NADDR16_HI | |
8929 | goto unsupp; | |
d8e90251 | 8930 | // Fall through. |
dd93cd0a AM |
8931 | case elfcpp::R_PPC64_ADDR16_HIGHERA: |
8932 | case elfcpp::R_PPC64_TPREL16_HIGHERA: | |
8933 | Reloc::addr16_ha2(view, value); | |
42cacb20 DE |
8934 | break; |
8935 | ||
dd93cd0a AM |
8936 | case elfcpp::R_PPC64_DTPREL16_HIGHEST: |
8937 | if (size == 32) | |
8938 | // R_PPC_EMB_NADDR16_HA | |
8939 | goto unsupp; | |
d8e90251 | 8940 | // Fall through. |
dd93cd0a AM |
8941 | case elfcpp::R_PPC64_ADDR16_HIGHEST: |
8942 | case elfcpp::R_PPC64_TPREL16_HIGHEST: | |
8943 | Reloc::addr16_hi3(view, value); | |
42cacb20 DE |
8944 | break; |
8945 | ||
dd93cd0a AM |
8946 | case elfcpp::R_PPC64_DTPREL16_HIGHESTA: |
8947 | if (size == 32) | |
8948 | // R_PPC_EMB_SDAI16 | |
8949 | goto unsupp; | |
d8e90251 | 8950 | // Fall through. |
dd93cd0a AM |
8951 | case elfcpp::R_PPC64_ADDR16_HIGHESTA: |
8952 | case elfcpp::R_PPC64_TPREL16_HIGHESTA: | |
8953 | Reloc::addr16_ha3(view, value); | |
8954 | break; | |
8955 | ||
8956 | case elfcpp::R_PPC64_DTPREL16_DS: | |
8957 | case elfcpp::R_PPC64_DTPREL16_LO_DS: | |
8958 | if (size == 32) | |
8959 | // R_PPC_EMB_NADDR32, R_PPC_EMB_NADDR16 | |
8960 | goto unsupp; | |
d8e90251 | 8961 | // Fall through. |
dd93cd0a AM |
8962 | case elfcpp::R_PPC64_TPREL16_DS: |
8963 | case elfcpp::R_PPC64_TPREL16_LO_DS: | |
8964 | if (size == 32) | |
8965 | // R_PPC_TLSGD, R_PPC_TLSLD | |
8966 | break; | |
d8e90251 | 8967 | // Fall through. |
cf43a2fe AM |
8968 | case elfcpp::R_PPC64_ADDR16_DS: |
8969 | case elfcpp::R_PPC64_ADDR16_LO_DS: | |
42cacb20 DE |
8970 | case elfcpp::R_PPC64_TOC16_DS: |
8971 | case elfcpp::R_PPC64_TOC16_LO_DS: | |
cf43a2fe AM |
8972 | case elfcpp::R_PPC64_GOT16_DS: |
8973 | case elfcpp::R_PPC64_GOT16_LO_DS: | |
8974 | case elfcpp::R_PPC64_SECTOFF_DS: | |
8975 | case elfcpp::R_PPC64_SECTOFF_LO_DS: | |
a680de9a | 8976 | maybe_dq_reloc = true; |
dd93cd0a AM |
8977 | break; |
8978 | ||
8979 | case elfcpp::R_POWERPC_ADDR14: | |
8980 | case elfcpp::R_POWERPC_ADDR14_BRTAKEN: | |
8981 | case elfcpp::R_POWERPC_ADDR14_BRNTAKEN: | |
8982 | case elfcpp::R_POWERPC_REL14: | |
8983 | case elfcpp::R_POWERPC_REL14_BRTAKEN: | |
8984 | case elfcpp::R_POWERPC_REL14_BRNTAKEN: | |
3ea0a085 | 8985 | status = Reloc::addr14(view, value, overflow); |
42cacb20 DE |
8986 | break; |
8987 | ||
8988 | case elfcpp::R_POWERPC_COPY: | |
8989 | case elfcpp::R_POWERPC_GLOB_DAT: | |
8990 | case elfcpp::R_POWERPC_JMP_SLOT: | |
8991 | case elfcpp::R_POWERPC_RELATIVE: | |
42cacb20 | 8992 | case elfcpp::R_POWERPC_DTPMOD: |
dd93cd0a AM |
8993 | case elfcpp::R_PPC64_JMP_IREL: |
8994 | case elfcpp::R_POWERPC_IRELATIVE: | |
42cacb20 DE |
8995 | gold_error_at_location(relinfo, relnum, rela.get_r_offset(), |
8996 | _("unexpected reloc %u in object file"), | |
8997 | r_type); | |
8998 | break; | |
8999 | ||
7e57d19e | 9000 | case elfcpp::R_PPC64_TOCSAVE: |
dd93cd0a | 9001 | if (size == 32) |
7e57d19e | 9002 | // R_PPC_EMB_SDA21 |
dd93cd0a AM |
9003 | goto unsupp; |
9004 | else | |
9005 | { | |
7e57d19e AM |
9006 | Symbol_location loc; |
9007 | loc.object = relinfo->object; | |
9008 | loc.shndx = relinfo->data_shndx; | |
9009 | loc.offset = rela.get_r_offset(); | |
9010 | Tocsave_loc::const_iterator p = target->tocsave_loc().find(loc); | |
9011 | if (p != target->tocsave_loc().end()) | |
9012 | { | |
9013 | // If we've generated plt calls using this tocsave, then | |
9014 | // the nop needs to be changed to save r2. | |
9015 | Insn* iview = reinterpret_cast<Insn*>(view); | |
9016 | if (elfcpp::Swap<32, big_endian>::readval(iview) == nop) | |
9017 | elfcpp::Swap<32, big_endian>:: | |
9018 | writeval(iview, std_2_1 + target->stk_toc()); | |
9019 | } | |
dd93cd0a AM |
9020 | } |
9021 | break; | |
9022 | ||
9023 | case elfcpp::R_PPC_EMB_SDA2I16: | |
9024 | case elfcpp::R_PPC_EMB_SDA2REL: | |
9025 | if (size == 32) | |
9026 | goto unsupp; | |
9027 | // R_PPC64_TLSGD, R_PPC64_TLSLD | |
6ce78956 AM |
9028 | break; |
9029 | ||
dd93cd0a AM |
9030 | case elfcpp::R_POWERPC_PLT32: |
9031 | case elfcpp::R_POWERPC_PLTREL32: | |
9032 | case elfcpp::R_POWERPC_PLT16_LO: | |
9033 | case elfcpp::R_POWERPC_PLT16_HI: | |
9034 | case elfcpp::R_POWERPC_PLT16_HA: | |
9035 | case elfcpp::R_PPC_SDAREL16: | |
9036 | case elfcpp::R_POWERPC_ADDR30: | |
9037 | case elfcpp::R_PPC64_PLT64: | |
9038 | case elfcpp::R_PPC64_PLTREL64: | |
9039 | case elfcpp::R_PPC64_PLTGOT16: | |
9040 | case elfcpp::R_PPC64_PLTGOT16_LO: | |
9041 | case elfcpp::R_PPC64_PLTGOT16_HI: | |
9042 | case elfcpp::R_PPC64_PLTGOT16_HA: | |
9043 | case elfcpp::R_PPC64_PLT16_LO_DS: | |
9044 | case elfcpp::R_PPC64_PLTGOT16_DS: | |
9045 | case elfcpp::R_PPC64_PLTGOT16_LO_DS: | |
dd93cd0a AM |
9046 | case elfcpp::R_PPC_EMB_RELSDA: |
9047 | case elfcpp::R_PPC_TOC16: | |
42cacb20 | 9048 | default: |
dd93cd0a | 9049 | unsupp: |
42cacb20 DE |
9050 | gold_error_at_location(relinfo, relnum, rela.get_r_offset(), |
9051 | _("unsupported reloc %u"), | |
9052 | r_type); | |
9053 | break; | |
9054 | } | |
a680de9a PB |
9055 | |
9056 | if (maybe_dq_reloc) | |
9057 | { | |
9058 | if (insn == 0) | |
9059 | insn = elfcpp::Swap<32, big_endian>::readval(iview); | |
9060 | ||
9061 | if ((insn & (0x3f << 26)) == 56u << 26 /* lq */ | |
9062 | || ((insn & (0x3f << 26)) == (61u << 26) /* lxv, stxv */ | |
9063 | && (insn & 3) == 1)) | |
9064 | status = Reloc::addr16_dq(view, value, overflow); | |
9065 | else if (size == 64 | |
9066 | || (insn & (0x3f << 26)) == 58u << 26 /* ld,ldu,lwa */ | |
9067 | || (insn & (0x3f << 26)) == 62u << 26 /* std,stdu,stq */ | |
9068 | || (insn & (0x3f << 26)) == 57u << 26 /* lfdp */ | |
9069 | || (insn & (0x3f << 26)) == 61u << 26 /* stfdp */) | |
9070 | status = Reloc::addr16_ds(view, value, overflow); | |
9071 | else | |
9072 | status = Reloc::addr16(view, value, overflow); | |
9073 | } | |
9074 | ||
0cfb0717 | 9075 | if (status != Powerpc_relocate_functions<size, big_endian>::STATUS_OK |
3ffaac20 AM |
9076 | && (has_stub_value |
9077 | || !(gsym != NULL | |
282c9750 | 9078 | && gsym->is_undefined() |
3ffaac20 | 9079 | && is_branch_reloc(r_type)))) |
0cfb0717 AM |
9080 | { |
9081 | gold_error_at_location(relinfo, relnum, rela.get_r_offset(), | |
9082 | _("relocation overflow")); | |
9083 | if (has_stub_value) | |
9084 | gold_info(_("try relinking with a smaller --stub-group-size")); | |
9085 | } | |
42cacb20 DE |
9086 | |
9087 | return true; | |
9088 | } | |
9089 | ||
42cacb20 DE |
9090 | // Relocate section data. |
9091 | ||
9092 | template<int size, bool big_endian> | |
9093 | void | |
9094 | Target_powerpc<size, big_endian>::relocate_section( | |
d83ce4e3 AM |
9095 | const Relocate_info<size, big_endian>* relinfo, |
9096 | unsigned int sh_type, | |
9097 | const unsigned char* prelocs, | |
9098 | size_t reloc_count, | |
9099 | Output_section* output_section, | |
9100 | bool needs_special_offset_handling, | |
9101 | unsigned char* view, | |
c9269dff | 9102 | Address address, |
d83ce4e3 AM |
9103 | section_size_type view_size, |
9104 | const Reloc_symbol_changes* reloc_symbol_changes) | |
42cacb20 DE |
9105 | { |
9106 | typedef Target_powerpc<size, big_endian> Powerpc; | |
9107 | typedef typename Target_powerpc<size, big_endian>::Relocate Powerpc_relocate; | |
168a4726 AM |
9108 | typedef typename Target_powerpc<size, big_endian>::Relocate_comdat_behavior |
9109 | Powerpc_comdat_behavior; | |
4d625b70 CC |
9110 | typedef gold::Default_classify_reloc<elfcpp::SHT_RELA, size, big_endian> |
9111 | Classify_reloc; | |
42cacb20 DE |
9112 | |
9113 | gold_assert(sh_type == elfcpp::SHT_RELA); | |
9114 | ||
4d625b70 CC |
9115 | gold::relocate_section<size, big_endian, Powerpc, Powerpc_relocate, |
9116 | Powerpc_comdat_behavior, Classify_reloc>( | |
42cacb20 DE |
9117 | relinfo, |
9118 | this, | |
9119 | prelocs, | |
9120 | reloc_count, | |
9121 | output_section, | |
9122 | needs_special_offset_handling, | |
9123 | view, | |
9124 | address, | |
364c7fa5 ILT |
9125 | view_size, |
9126 | reloc_symbol_changes); | |
42cacb20 DE |
9127 | } |
9128 | ||
4d625b70 | 9129 | template<int size, bool big_endian> |
cf43a2fe | 9130 | class Powerpc_scan_relocatable_reloc |
42cacb20 | 9131 | { |
cf43a2fe | 9132 | public: |
0e123f69 AM |
9133 | typedef typename elfcpp::Rela<size, big_endian> Reltype; |
9134 | static const int reloc_size = elfcpp::Elf_sizes<size>::rela_size; | |
4d625b70 CC |
9135 | static const int sh_type = elfcpp::SHT_RELA; |
9136 | ||
9137 | // Return the symbol referred to by the relocation. | |
9138 | static inline unsigned int | |
9139 | get_r_sym(const Reltype* reloc) | |
9140 | { return elfcpp::elf_r_sym<size>(reloc->get_r_info()); } | |
9141 | ||
9142 | // Return the type of the relocation. | |
9143 | static inline unsigned int | |
9144 | get_r_type(const Reltype* reloc) | |
9145 | { return elfcpp::elf_r_type<size>(reloc->get_r_info()); } | |
9146 | ||
cf43a2fe AM |
9147 | // Return the strategy to use for a local symbol which is not a |
9148 | // section symbol, given the relocation type. | |
9149 | inline Relocatable_relocs::Reloc_strategy | |
9150 | local_non_section_strategy(unsigned int r_type, Relobj*, unsigned int r_sym) | |
9151 | { | |
9152 | if (r_type == 0 && r_sym == 0) | |
9153 | return Relocatable_relocs::RELOC_DISCARD; | |
9154 | return Relocatable_relocs::RELOC_COPY; | |
9155 | } | |
9156 | ||
9157 | // Return the strategy to use for a local symbol which is a section | |
9158 | // symbol, given the relocation type. | |
9159 | inline Relocatable_relocs::Reloc_strategy | |
9160 | local_section_strategy(unsigned int, Relobj*) | |
9161 | { | |
9162 | return Relocatable_relocs::RELOC_ADJUST_FOR_SECTION_RELA; | |
9163 | } | |
9164 | ||
9165 | // Return the strategy to use for a global symbol, given the | |
9166 | // relocation type, the object, and the symbol index. | |
9167 | inline Relocatable_relocs::Reloc_strategy | |
9168 | global_strategy(unsigned int r_type, Relobj*, unsigned int) | |
9169 | { | |
9170 | if (r_type == elfcpp::R_PPC_PLTREL24) | |
9171 | return Relocatable_relocs::RELOC_SPECIAL; | |
9172 | return Relocatable_relocs::RELOC_COPY; | |
9173 | } | |
9174 | }; | |
42cacb20 DE |
9175 | |
9176 | // Scan the relocs during a relocatable link. | |
9177 | ||
9178 | template<int size, bool big_endian> | |
9179 | void | |
9180 | Target_powerpc<size, big_endian>::scan_relocatable_relocs( | |
d83ce4e3 AM |
9181 | Symbol_table* symtab, |
9182 | Layout* layout, | |
9183 | Sized_relobj_file<size, big_endian>* object, | |
9184 | unsigned int data_shndx, | |
9185 | unsigned int sh_type, | |
9186 | const unsigned char* prelocs, | |
9187 | size_t reloc_count, | |
9188 | Output_section* output_section, | |
9189 | bool needs_special_offset_handling, | |
9190 | size_t local_symbol_count, | |
9191 | const unsigned char* plocal_symbols, | |
9192 | Relocatable_relocs* rr) | |
42cacb20 | 9193 | { |
4d625b70 CC |
9194 | typedef Powerpc_scan_relocatable_reloc<size, big_endian> Scan_strategy; |
9195 | ||
42cacb20 DE |
9196 | gold_assert(sh_type == elfcpp::SHT_RELA); |
9197 | ||
4d625b70 | 9198 | gold::scan_relocatable_relocs<size, big_endian, Scan_strategy>( |
42cacb20 DE |
9199 | symtab, |
9200 | layout, | |
9201 | object, | |
9202 | data_shndx, | |
9203 | prelocs, | |
9204 | reloc_count, | |
9205 | output_section, | |
9206 | needs_special_offset_handling, | |
9207 | local_symbol_count, | |
9208 | plocal_symbols, | |
9209 | rr); | |
9210 | } | |
9211 | ||
4d625b70 CC |
9212 | // Scan the relocs for --emit-relocs. |
9213 | ||
9214 | template<int size, bool big_endian> | |
9215 | void | |
9216 | Target_powerpc<size, big_endian>::emit_relocs_scan( | |
9217 | Symbol_table* symtab, | |
9218 | Layout* layout, | |
9219 | Sized_relobj_file<size, big_endian>* object, | |
9220 | unsigned int data_shndx, | |
9221 | unsigned int sh_type, | |
9222 | const unsigned char* prelocs, | |
9223 | size_t reloc_count, | |
9224 | Output_section* output_section, | |
9225 | bool needs_special_offset_handling, | |
9226 | size_t local_symbol_count, | |
9227 | const unsigned char* plocal_syms, | |
9228 | Relocatable_relocs* rr) | |
9229 | { | |
9230 | typedef gold::Default_classify_reloc<elfcpp::SHT_RELA, size, big_endian> | |
9231 | Classify_reloc; | |
9232 | typedef gold::Default_emit_relocs_strategy<Classify_reloc> | |
9233 | Emit_relocs_strategy; | |
9234 | ||
9235 | gold_assert(sh_type == elfcpp::SHT_RELA); | |
9236 | ||
9237 | gold::scan_relocatable_relocs<size, big_endian, Emit_relocs_strategy>( | |
9238 | symtab, | |
9239 | layout, | |
9240 | object, | |
9241 | data_shndx, | |
9242 | prelocs, | |
9243 | reloc_count, | |
9244 | output_section, | |
9245 | needs_special_offset_handling, | |
9246 | local_symbol_count, | |
9247 | plocal_syms, | |
9248 | rr); | |
9249 | } | |
9250 | ||
7404fe1b | 9251 | // Emit relocations for a section. |
dd93cd0a AM |
9252 | // This is a modified version of the function by the same name in |
9253 | // target-reloc.h. Using relocate_special_relocatable for | |
9254 | // R_PPC_PLTREL24 would require duplication of the entire body of the | |
9255 | // loop, so we may as well duplicate the whole thing. | |
42cacb20 DE |
9256 | |
9257 | template<int size, bool big_endian> | |
9258 | void | |
7404fe1b | 9259 | Target_powerpc<size, big_endian>::relocate_relocs( |
42cacb20 DE |
9260 | const Relocate_info<size, big_endian>* relinfo, |
9261 | unsigned int sh_type, | |
9262 | const unsigned char* prelocs, | |
9263 | size_t reloc_count, | |
9264 | Output_section* output_section, | |
62fe925a | 9265 | typename elfcpp::Elf_types<size>::Elf_Off offset_in_output_section, |
cf43a2fe | 9266 | unsigned char*, |
dd93cd0a | 9267 | Address view_address, |
cf43a2fe | 9268 | section_size_type, |
42cacb20 DE |
9269 | unsigned char* reloc_view, |
9270 | section_size_type reloc_view_size) | |
9271 | { | |
9272 | gold_assert(sh_type == elfcpp::SHT_RELA); | |
9273 | ||
0e123f69 AM |
9274 | typedef typename elfcpp::Rela<size, big_endian> Reltype; |
9275 | typedef typename elfcpp::Rela_write<size, big_endian> Reltype_write; | |
9276 | const int reloc_size = elfcpp::Elf_sizes<size>::rela_size; | |
dcfc7dd4 AM |
9277 | // Offset from start of insn to d-field reloc. |
9278 | const int d_offset = big_endian ? 2 : 0; | |
cf43a2fe AM |
9279 | |
9280 | Powerpc_relobj<size, big_endian>* const object | |
9281 | = static_cast<Powerpc_relobj<size, big_endian>*>(relinfo->object); | |
9282 | const unsigned int local_count = object->local_symbol_count(); | |
9283 | unsigned int got2_shndx = object->got2_shndx(); | |
c9269dff | 9284 | Address got2_addend = 0; |
cf43a2fe | 9285 | if (got2_shndx != 0) |
c9269dff AM |
9286 | { |
9287 | got2_addend = object->get_output_section_offset(got2_shndx); | |
9288 | gold_assert(got2_addend != invalid_address); | |
9289 | } | |
cf43a2fe AM |
9290 | |
9291 | unsigned char* pwrite = reloc_view; | |
7404fe1b | 9292 | bool zap_next = false; |
cf43a2fe AM |
9293 | for (size_t i = 0; i < reloc_count; ++i, prelocs += reloc_size) |
9294 | { | |
91a65d2f | 9295 | Relocatable_relocs::Reloc_strategy strategy = relinfo->rr->strategy(i); |
cf43a2fe AM |
9296 | if (strategy == Relocatable_relocs::RELOC_DISCARD) |
9297 | continue; | |
9298 | ||
9299 | Reltype reloc(prelocs); | |
9300 | Reltype_write reloc_write(pwrite); | |
9301 | ||
7404fe1b | 9302 | Address offset = reloc.get_r_offset(); |
cf43a2fe | 9303 | typename elfcpp::Elf_types<size>::Elf_WXword r_info = reloc.get_r_info(); |
7404fe1b AM |
9304 | unsigned int r_sym = elfcpp::elf_r_sym<size>(r_info); |
9305 | unsigned int r_type = elfcpp::elf_r_type<size>(r_info); | |
9306 | const unsigned int orig_r_sym = r_sym; | |
9307 | typename elfcpp::Elf_types<size>::Elf_Swxword addend | |
9308 | = reloc.get_r_addend(); | |
9309 | const Symbol* gsym = NULL; | |
9310 | ||
9311 | if (zap_next) | |
9312 | { | |
9313 | // We could arrange to discard these and other relocs for | |
9314 | // tls optimised sequences in the strategy methods, but for | |
9315 | // now do as BFD ld does. | |
9316 | r_type = elfcpp::R_POWERPC_NONE; | |
9317 | zap_next = false; | |
9318 | } | |
cf43a2fe AM |
9319 | |
9320 | // Get the new symbol index. | |
9215b98b | 9321 | Output_section* os = NULL; |
cf43a2fe AM |
9322 | if (r_sym < local_count) |
9323 | { | |
9324 | switch (strategy) | |
9325 | { | |
9326 | case Relocatable_relocs::RELOC_COPY: | |
9327 | case Relocatable_relocs::RELOC_SPECIAL: | |
7404fe1b | 9328 | if (r_sym != 0) |
dd93cd0a | 9329 | { |
7404fe1b AM |
9330 | r_sym = object->symtab_index(r_sym); |
9331 | gold_assert(r_sym != -1U); | |
dd93cd0a | 9332 | } |
cf43a2fe AM |
9333 | break; |
9334 | ||
9335 | case Relocatable_relocs::RELOC_ADJUST_FOR_SECTION_RELA: | |
9336 | { | |
9337 | // We are adjusting a section symbol. We need to find | |
9338 | // the symbol table index of the section symbol for | |
9339 | // the output section corresponding to input section | |
9340 | // in which this symbol is defined. | |
9341 | gold_assert(r_sym < local_count); | |
9342 | bool is_ordinary; | |
9343 | unsigned int shndx = | |
9344 | object->local_symbol_input_shndx(r_sym, &is_ordinary); | |
9345 | gold_assert(is_ordinary); | |
9215b98b | 9346 | os = object->output_section(shndx); |
cf43a2fe AM |
9347 | gold_assert(os != NULL); |
9348 | gold_assert(os->needs_symtab_index()); | |
7404fe1b | 9349 | r_sym = os->symtab_index(); |
cf43a2fe AM |
9350 | } |
9351 | break; | |
9352 | ||
9353 | default: | |
9354 | gold_unreachable(); | |
9355 | } | |
9356 | } | |
9357 | else | |
9358 | { | |
7404fe1b | 9359 | gsym = object->global_symbol(r_sym); |
cf43a2fe AM |
9360 | gold_assert(gsym != NULL); |
9361 | if (gsym->is_forwarder()) | |
9362 | gsym = relinfo->symtab->resolve_forwards(gsym); | |
9363 | ||
9364 | gold_assert(gsym->has_symtab_index()); | |
7404fe1b | 9365 | r_sym = gsym->symtab_index(); |
cf43a2fe AM |
9366 | } |
9367 | ||
9368 | // Get the new offset--the location in the output section where | |
9369 | // this relocation should be applied. | |
cf43a2fe | 9370 | if (static_cast<Address>(offset_in_output_section) != invalid_address) |
7404fe1b | 9371 | offset += offset_in_output_section; |
cf43a2fe AM |
9372 | else |
9373 | { | |
c9269dff AM |
9374 | section_offset_type sot_offset = |
9375 | convert_types<section_offset_type, Address>(offset); | |
cf43a2fe | 9376 | section_offset_type new_sot_offset = |
c9269dff AM |
9377 | output_section->output_offset(object, relinfo->data_shndx, |
9378 | sot_offset); | |
cf43a2fe | 9379 | gold_assert(new_sot_offset != -1); |
7404fe1b | 9380 | offset = new_sot_offset; |
cf43a2fe AM |
9381 | } |
9382 | ||
dd93cd0a AM |
9383 | // In an object file, r_offset is an offset within the section. |
9384 | // In an executable or dynamic object, generated by | |
9385 | // --emit-relocs, r_offset is an absolute address. | |
7404fe1b | 9386 | if (!parameters->options().relocatable()) |
dd93cd0a | 9387 | { |
7404fe1b | 9388 | offset += view_address; |
dd93cd0a | 9389 | if (static_cast<Address>(offset_in_output_section) != invalid_address) |
7404fe1b | 9390 | offset -= offset_in_output_section; |
dd93cd0a AM |
9391 | } |
9392 | ||
cf43a2fe | 9393 | // Handle the reloc addend based on the strategy. |
cf43a2fe AM |
9394 | if (strategy == Relocatable_relocs::RELOC_COPY) |
9395 | ; | |
9396 | else if (strategy == Relocatable_relocs::RELOC_ADJUST_FOR_SECTION_RELA) | |
9397 | { | |
7404fe1b | 9398 | const Symbol_value<size>* psymval = object->local_symbol(orig_r_sym); |
9215b98b AM |
9399 | gold_assert(os != NULL); |
9400 | addend = psymval->value(object, addend) - os->address(); | |
cf43a2fe AM |
9401 | } |
9402 | else if (strategy == Relocatable_relocs::RELOC_SPECIAL) | |
9403 | { | |
e3a7574e AM |
9404 | if (size == 32) |
9405 | { | |
9406 | if (addend >= 32768) | |
9407 | addend += got2_addend; | |
9408 | } | |
9409 | else if (r_type == elfcpp::R_POWERPC_REL16_HA) | |
9410 | { | |
9411 | r_type = elfcpp::R_POWERPC_ADDR16_HA; | |
dcfc7dd4 | 9412 | addend -= d_offset; |
e3a7574e AM |
9413 | } |
9414 | else if (r_type == elfcpp::R_POWERPC_REL16_LO) | |
9415 | { | |
9416 | r_type = elfcpp::R_POWERPC_ADDR16_LO; | |
dcfc7dd4 | 9417 | addend -= d_offset + 4; |
e3a7574e | 9418 | } |
cf43a2fe AM |
9419 | } |
9420 | else | |
9421 | gold_unreachable(); | |
9422 | ||
7404fe1b AM |
9423 | if (!parameters->options().relocatable()) |
9424 | { | |
9425 | if (r_type == elfcpp::R_POWERPC_GOT_TLSGD16 | |
9426 | || r_type == elfcpp::R_POWERPC_GOT_TLSGD16_LO | |
9427 | || r_type == elfcpp::R_POWERPC_GOT_TLSGD16_HI | |
9428 | || r_type == elfcpp::R_POWERPC_GOT_TLSGD16_HA) | |
9429 | { | |
9430 | // First instruction of a global dynamic sequence, | |
9431 | // arg setup insn. | |
9432 | const bool final = gsym == NULL || gsym->final_value_is_known(); | |
9433 | switch (this->optimize_tls_gd(final)) | |
9434 | { | |
9435 | case tls::TLSOPT_TO_IE: | |
9436 | r_type += (elfcpp::R_POWERPC_GOT_TPREL16 | |
9437 | - elfcpp::R_POWERPC_GOT_TLSGD16); | |
9438 | break; | |
9439 | case tls::TLSOPT_TO_LE: | |
9440 | if (r_type == elfcpp::R_POWERPC_GOT_TLSGD16 | |
9441 | || r_type == elfcpp::R_POWERPC_GOT_TLSGD16_LO) | |
9442 | r_type = elfcpp::R_POWERPC_TPREL16_HA; | |
9443 | else | |
9444 | { | |
9445 | r_type = elfcpp::R_POWERPC_NONE; | |
dcfc7dd4 | 9446 | offset -= d_offset; |
7404fe1b AM |
9447 | } |
9448 | break; | |
9449 | default: | |
9450 | break; | |
9451 | } | |
9452 | } | |
9453 | else if (r_type == elfcpp::R_POWERPC_GOT_TLSLD16 | |
9454 | || r_type == elfcpp::R_POWERPC_GOT_TLSLD16_LO | |
9455 | || r_type == elfcpp::R_POWERPC_GOT_TLSLD16_HI | |
9456 | || r_type == elfcpp::R_POWERPC_GOT_TLSLD16_HA) | |
9457 | { | |
9458 | // First instruction of a local dynamic sequence, | |
9459 | // arg setup insn. | |
9460 | if (this->optimize_tls_ld() == tls::TLSOPT_TO_LE) | |
9461 | { | |
9462 | if (r_type == elfcpp::R_POWERPC_GOT_TLSLD16 | |
9463 | || r_type == elfcpp::R_POWERPC_GOT_TLSLD16_LO) | |
9464 | { | |
9465 | r_type = elfcpp::R_POWERPC_TPREL16_HA; | |
9466 | const Output_section* os = relinfo->layout->tls_segment() | |
9467 | ->first_section(); | |
9468 | gold_assert(os != NULL); | |
9469 | gold_assert(os->needs_symtab_index()); | |
9470 | r_sym = os->symtab_index(); | |
9471 | addend = dtp_offset; | |
9472 | } | |
9473 | else | |
9474 | { | |
9475 | r_type = elfcpp::R_POWERPC_NONE; | |
dcfc7dd4 | 9476 | offset -= d_offset; |
7404fe1b AM |
9477 | } |
9478 | } | |
9479 | } | |
9480 | else if (r_type == elfcpp::R_POWERPC_GOT_TPREL16 | |
9481 | || r_type == elfcpp::R_POWERPC_GOT_TPREL16_LO | |
9482 | || r_type == elfcpp::R_POWERPC_GOT_TPREL16_HI | |
9483 | || r_type == elfcpp::R_POWERPC_GOT_TPREL16_HA) | |
9484 | { | |
9485 | // First instruction of initial exec sequence. | |
9486 | const bool final = gsym == NULL || gsym->final_value_is_known(); | |
9487 | if (this->optimize_tls_ie(final) == tls::TLSOPT_TO_LE) | |
9488 | { | |
9489 | if (r_type == elfcpp::R_POWERPC_GOT_TPREL16 | |
9490 | || r_type == elfcpp::R_POWERPC_GOT_TPREL16_LO) | |
9491 | r_type = elfcpp::R_POWERPC_TPREL16_HA; | |
9492 | else | |
9493 | { | |
9494 | r_type = elfcpp::R_POWERPC_NONE; | |
dcfc7dd4 | 9495 | offset -= d_offset; |
7404fe1b AM |
9496 | } |
9497 | } | |
9498 | } | |
9499 | else if ((size == 64 && r_type == elfcpp::R_PPC64_TLSGD) | |
9500 | || (size == 32 && r_type == elfcpp::R_PPC_TLSGD)) | |
9501 | { | |
9502 | // Second instruction of a global dynamic sequence, | |
9503 | // the __tls_get_addr call | |
9504 | const bool final = gsym == NULL || gsym->final_value_is_known(); | |
9505 | switch (this->optimize_tls_gd(final)) | |
9506 | { | |
9507 | case tls::TLSOPT_TO_IE: | |
9508 | r_type = elfcpp::R_POWERPC_NONE; | |
9509 | zap_next = true; | |
9510 | break; | |
9511 | case tls::TLSOPT_TO_LE: | |
9512 | r_type = elfcpp::R_POWERPC_TPREL16_LO; | |
dcfc7dd4 | 9513 | offset += d_offset; |
7404fe1b AM |
9514 | zap_next = true; |
9515 | break; | |
9516 | default: | |
9517 | break; | |
9518 | } | |
9519 | } | |
9520 | else if ((size == 64 && r_type == elfcpp::R_PPC64_TLSLD) | |
9521 | || (size == 32 && r_type == elfcpp::R_PPC_TLSLD)) | |
9522 | { | |
9523 | // Second instruction of a local dynamic sequence, | |
9524 | // the __tls_get_addr call | |
9525 | if (this->optimize_tls_ld() == tls::TLSOPT_TO_LE) | |
9526 | { | |
9527 | const Output_section* os = relinfo->layout->tls_segment() | |
9528 | ->first_section(); | |
9529 | gold_assert(os != NULL); | |
9530 | gold_assert(os->needs_symtab_index()); | |
9531 | r_sym = os->symtab_index(); | |
9532 | addend = dtp_offset; | |
9533 | r_type = elfcpp::R_POWERPC_TPREL16_LO; | |
dcfc7dd4 | 9534 | offset += d_offset; |
7404fe1b AM |
9535 | zap_next = true; |
9536 | } | |
9537 | } | |
9538 | else if (r_type == elfcpp::R_POWERPC_TLS) | |
9539 | { | |
9540 | // Second instruction of an initial exec sequence | |
9541 | const bool final = gsym == NULL || gsym->final_value_is_known(); | |
9542 | if (this->optimize_tls_ie(final) == tls::TLSOPT_TO_LE) | |
9543 | { | |
9544 | r_type = elfcpp::R_POWERPC_TPREL16_LO; | |
dcfc7dd4 | 9545 | offset += d_offset; |
7404fe1b AM |
9546 | } |
9547 | } | |
9548 | } | |
9549 | ||
9550 | reloc_write.put_r_offset(offset); | |
9551 | reloc_write.put_r_info(elfcpp::elf_r_info<size>(r_sym, r_type)); | |
9552 | reloc_write.put_r_addend(addend); | |
cf43a2fe AM |
9553 | |
9554 | pwrite += reloc_size; | |
9555 | } | |
9556 | ||
9557 | gold_assert(static_cast<section_size_type>(pwrite - reloc_view) | |
9558 | == reloc_view_size); | |
42cacb20 DE |
9559 | } |
9560 | ||
ec661b9d | 9561 | // Return the value to use for a dynamic symbol which requires special |
42cacb20 DE |
9562 | // treatment. This is how we support equality comparisons of function |
9563 | // pointers across shared library boundaries, as described in the | |
9564 | // processor specific ABI supplement. | |
9565 | ||
9566 | template<int size, bool big_endian> | |
9567 | uint64_t | |
9568 | Target_powerpc<size, big_endian>::do_dynsym_value(const Symbol* gsym) const | |
9569 | { | |
cf43a2fe AM |
9570 | if (size == 32) |
9571 | { | |
9572 | gold_assert(gsym->is_from_dynobj() && gsym->has_plt_offset()); | |
ec661b9d AM |
9573 | for (typename Stub_tables::const_iterator p = this->stub_tables_.begin(); |
9574 | p != this->stub_tables_.end(); | |
9575 | ++p) | |
9576 | { | |
7e57d19e AM |
9577 | const typename Stub_table<size, big_endian>::Plt_stub_ent* ent |
9578 | = (*p)->find_plt_call_entry(gsym); | |
9579 | if (ent != NULL) | |
9580 | return (*p)->stub_address() + ent->off_; | |
ec661b9d | 9581 | } |
c9824451 | 9582 | } |
9055360d AM |
9583 | else if (this->abiversion() >= 2) |
9584 | { | |
faa2211d AM |
9585 | Address off = this->glink_section()->find_global_entry(gsym); |
9586 | if (off != invalid_address) | |
9055360d AM |
9587 | return this->glink_section()->global_entry_address() + off; |
9588 | } | |
ec661b9d | 9589 | gold_unreachable(); |
c9824451 AM |
9590 | } |
9591 | ||
9592 | // Return the PLT address to use for a local symbol. | |
9593 | template<int size, bool big_endian> | |
9594 | uint64_t | |
9595 | Target_powerpc<size, big_endian>::do_plt_address_for_local( | |
9596 | const Relobj* object, | |
9597 | unsigned int symndx) const | |
9598 | { | |
9599 | if (size == 32) | |
9600 | { | |
9601 | const Sized_relobj<size, big_endian>* relobj | |
9602 | = static_cast<const Sized_relobj<size, big_endian>*>(object); | |
ec661b9d AM |
9603 | for (typename Stub_tables::const_iterator p = this->stub_tables_.begin(); |
9604 | p != this->stub_tables_.end(); | |
9605 | ++p) | |
9606 | { | |
7e57d19e AM |
9607 | const typename Stub_table<size, big_endian>::Plt_stub_ent* ent |
9608 | = (*p)->find_plt_call_entry(relobj->sized_relobj(), symndx); | |
9609 | if (ent != NULL) | |
9610 | return (*p)->stub_address() + ent->off_; | |
ec661b9d | 9611 | } |
c9824451 | 9612 | } |
ec661b9d | 9613 | gold_unreachable(); |
c9824451 AM |
9614 | } |
9615 | ||
9616 | // Return the PLT address to use for a global symbol. | |
9617 | template<int size, bool big_endian> | |
9618 | uint64_t | |
9619 | Target_powerpc<size, big_endian>::do_plt_address_for_global( | |
9620 | const Symbol* gsym) const | |
9621 | { | |
9622 | if (size == 32) | |
9623 | { | |
ec661b9d AM |
9624 | for (typename Stub_tables::const_iterator p = this->stub_tables_.begin(); |
9625 | p != this->stub_tables_.end(); | |
9626 | ++p) | |
9627 | { | |
7e57d19e AM |
9628 | const typename Stub_table<size, big_endian>::Plt_stub_ent* ent |
9629 | = (*p)->find_plt_call_entry(gsym); | |
9630 | if (ent != NULL) | |
9631 | return (*p)->stub_address() + ent->off_; | |
ec661b9d | 9632 | } |
cf43a2fe | 9633 | } |
9055360d AM |
9634 | else if (this->abiversion() >= 2) |
9635 | { | |
faa2211d AM |
9636 | Address off = this->glink_section()->find_global_entry(gsym); |
9637 | if (off != invalid_address) | |
9055360d AM |
9638 | return this->glink_section()->global_entry_address() + off; |
9639 | } | |
ec661b9d | 9640 | gold_unreachable(); |
42cacb20 DE |
9641 | } |
9642 | ||
bd73a62d AM |
9643 | // Return the offset to use for the GOT_INDX'th got entry which is |
9644 | // for a local tls symbol specified by OBJECT, SYMNDX. | |
9645 | template<int size, bool big_endian> | |
9646 | int64_t | |
9647 | Target_powerpc<size, big_endian>::do_tls_offset_for_local( | |
9648 | const Relobj* object, | |
9649 | unsigned int symndx, | |
9650 | unsigned int got_indx) const | |
9651 | { | |
9652 | const Powerpc_relobj<size, big_endian>* ppc_object | |
9653 | = static_cast<const Powerpc_relobj<size, big_endian>*>(object); | |
9654 | if (ppc_object->local_symbol(symndx)->is_tls_symbol()) | |
9655 | { | |
9656 | for (Got_type got_type = GOT_TYPE_TLSGD; | |
9657 | got_type <= GOT_TYPE_TPREL; | |
9658 | got_type = Got_type(got_type + 1)) | |
9659 | if (ppc_object->local_has_got_offset(symndx, got_type)) | |
9660 | { | |
9661 | unsigned int off = ppc_object->local_got_offset(symndx, got_type); | |
9662 | if (got_type == GOT_TYPE_TLSGD) | |
9663 | off += size / 8; | |
9664 | if (off == got_indx * (size / 8)) | |
9665 | { | |
9666 | if (got_type == GOT_TYPE_TPREL) | |
9667 | return -tp_offset; | |
9668 | else | |
9669 | return -dtp_offset; | |
9670 | } | |
9671 | } | |
9672 | } | |
9673 | gold_unreachable(); | |
9674 | } | |
9675 | ||
9676 | // Return the offset to use for the GOT_INDX'th got entry which is | |
9677 | // for global tls symbol GSYM. | |
9678 | template<int size, bool big_endian> | |
9679 | int64_t | |
9680 | Target_powerpc<size, big_endian>::do_tls_offset_for_global( | |
9681 | Symbol* gsym, | |
9682 | unsigned int got_indx) const | |
9683 | { | |
9684 | if (gsym->type() == elfcpp::STT_TLS) | |
9685 | { | |
9686 | for (Got_type got_type = GOT_TYPE_TLSGD; | |
9687 | got_type <= GOT_TYPE_TPREL; | |
9688 | got_type = Got_type(got_type + 1)) | |
9689 | if (gsym->has_got_offset(got_type)) | |
9690 | { | |
9691 | unsigned int off = gsym->got_offset(got_type); | |
9692 | if (got_type == GOT_TYPE_TLSGD) | |
9693 | off += size / 8; | |
9694 | if (off == got_indx * (size / 8)) | |
9695 | { | |
9696 | if (got_type == GOT_TYPE_TPREL) | |
9697 | return -tp_offset; | |
9698 | else | |
9699 | return -dtp_offset; | |
9700 | } | |
9701 | } | |
9702 | } | |
9703 | gold_unreachable(); | |
9704 | } | |
9705 | ||
42cacb20 DE |
9706 | // The selector for powerpc object files. |
9707 | ||
9708 | template<int size, bool big_endian> | |
9709 | class Target_selector_powerpc : public Target_selector | |
9710 | { | |
9711 | public: | |
9712 | Target_selector_powerpc() | |
edc27beb AM |
9713 | : Target_selector(size == 64 ? elfcpp::EM_PPC64 : elfcpp::EM_PPC, |
9714 | size, big_endian, | |
03ef7571 ILT |
9715 | (size == 64 |
9716 | ? (big_endian ? "elf64-powerpc" : "elf64-powerpcle") | |
9717 | : (big_endian ? "elf32-powerpc" : "elf32-powerpcle")), | |
9718 | (size == 64 | |
9719 | ? (big_endian ? "elf64ppc" : "elf64lppc") | |
9720 | : (big_endian ? "elf32ppc" : "elf32lppc"))) | |
42cacb20 DE |
9721 | { } |
9722 | ||
2e702c99 RM |
9723 | virtual Target* |
9724 | do_instantiate_target() | |
7f055c20 | 9725 | { return new Target_powerpc<size, big_endian>(); } |
42cacb20 DE |
9726 | }; |
9727 | ||
9728 | Target_selector_powerpc<32, true> target_selector_ppc32; | |
9729 | Target_selector_powerpc<32, false> target_selector_ppc32le; | |
9730 | Target_selector_powerpc<64, true> target_selector_ppc64; | |
9731 | Target_selector_powerpc<64, false> target_selector_ppc64le; | |
9732 | ||
decdd3bc AM |
9733 | // Instantiate these constants for -O0 |
9734 | template<int size, bool big_endian> | |
9735 | const int Output_data_glink<size, big_endian>::pltresolve_size; | |
9736 | template<int size, bool big_endian> | |
9055360d AM |
9737 | const typename Output_data_glink<size, big_endian>::Address |
9738 | Output_data_glink<size, big_endian>::invalid_address; | |
9739 | template<int size, bool big_endian> | |
decdd3bc AM |
9740 | const typename Stub_table<size, big_endian>::Address |
9741 | Stub_table<size, big_endian>::invalid_address; | |
9742 | template<int size, bool big_endian> | |
9743 | const typename Target_powerpc<size, big_endian>::Address | |
9744 | Target_powerpc<size, big_endian>::invalid_address; | |
9745 | ||
42cacb20 | 9746 | } // End anonymous namespace. |