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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 | ||
7ee7ff70 AM |
375 | unsigned int |
376 | st_other (unsigned int symndx) const | |
377 | { | |
378 | return this->st_other_[symndx]; | |
379 | } | |
380 | ||
b4f7960d AM |
381 | unsigned int |
382 | ppc64_local_entry_offset(const Symbol* sym) const | |
383 | { return elfcpp::ppc64_decode_local_entry(sym->nonvis() >> 3); } | |
384 | ||
385 | unsigned int | |
386 | ppc64_local_entry_offset(unsigned int symndx) const | |
387 | { return elfcpp::ppc64_decode_local_entry(this->st_other_[symndx] >> 5); } | |
388 | ||
cf43a2fe | 389 | private: |
bfdfa4cd AM |
390 | struct Opd_ent |
391 | { | |
392 | unsigned int shndx; | |
c6de8ed4 AM |
393 | bool discard : 1; |
394 | bool gc_mark : 1; | |
26a4e9cb | 395 | Address off; |
bfdfa4cd AM |
396 | }; |
397 | ||
398 | // Return index into opd_ent_ array for .opd entry at OFF. | |
399 | // .opd entries are 24 bytes long, but they can be spaced 16 bytes | |
400 | // apart when the language doesn't use the last 8-byte word, the | |
401 | // environment pointer. Thus dividing the entry section offset by | |
402 | // 16 will give an index into opd_ent_ that works for either layout | |
403 | // of .opd. (It leaves some elements of the vector unused when .opd | |
404 | // entries are spaced 24 bytes apart, but we don't know the spacing | |
405 | // until relocations are processed, and in any case it is possible | |
406 | // for an object to have some entries spaced 16 bytes apart and | |
407 | // others 24 bytes apart.) | |
c9269dff AM |
408 | size_t |
409 | opd_ent_ndx(size_t off) const | |
410 | { return off >> 4;} | |
411 | ||
590b87ff AM |
412 | // Per object unique identifier |
413 | uint32_t uniq_; | |
414 | ||
c9269dff AM |
415 | // For 32-bit the .got2 section shdnx, for 64-bit the .opd section shndx. |
416 | unsigned int special_; | |
bfdfa4cd | 417 | |
5edad15d AM |
418 | // For 64-bit the .rela.toc and .toc section shdnx. |
419 | unsigned int relatoc_; | |
420 | unsigned int toc_; | |
421 | ||
d8f5a274 AM |
422 | // For 64-bit, whether this object uses small model relocs to access |
423 | // the toc. | |
424 | bool has_small_toc_reloc_; | |
425 | ||
bfdfa4cd AM |
426 | // Set at the start of gc_process_relocs, when we know opd_ent_ |
427 | // vector is valid. The flag could be made atomic and set in | |
428 | // do_read_relocs with memory_order_release and then tested with | |
429 | // memory_order_acquire, potentially resulting in fewer entries in | |
430 | // access_from_map_. | |
431 | bool opd_valid_; | |
432 | ||
590b87ff AM |
433 | // Header e_flags |
434 | elfcpp::Elf_Word e_flags_; | |
435 | ||
436 | // For 64-bit, an array with one entry per 64-bit word in the .toc | |
437 | // section, set if accesses using that word cannot be optimised. | |
438 | std::vector<bool> no_toc_opt_; | |
439 | ||
c9269dff AM |
440 | // The first 8-byte word of an OPD entry gives the address of the |
441 | // entry point of the function. Relocatable object files have a | |
bfdfa4cd | 442 | // relocation on this word. The following vector records the |
c9269dff | 443 | // section and offset specified by these relocations. |
bfdfa4cd AM |
444 | std::vector<Opd_ent> opd_ent_; |
445 | ||
e81fea4d | 446 | // References made to this object's .opd section when running |
bfdfa4cd AM |
447 | // gc_process_relocs for another object, before the opd_ent_ vector |
448 | // is valid for this object. | |
e81fea4d | 449 | Access_from access_from_map_; |
ec661b9d AM |
450 | |
451 | // Whether input section has a 14-bit branch reloc. | |
452 | std::vector<bool> has14_; | |
453 | ||
454 | // The stub table to use for a given input section. | |
a3e60ddb | 455 | std::vector<unsigned int> stub_table_index_; |
b4f7960d | 456 | |
b4f7960d AM |
457 | // ELF st_other field for local symbols. |
458 | std::vector<unsigned char> st_other_; | |
cf43a2fe AM |
459 | }; |
460 | ||
dc3714f3 AM |
461 | template<int size, bool big_endian> |
462 | class Powerpc_dynobj : public Sized_dynobj<size, big_endian> | |
463 | { | |
464 | public: | |
465 | typedef typename elfcpp::Elf_types<size>::Elf_Addr Address; | |
466 | ||
467 | Powerpc_dynobj(const std::string& name, Input_file* input_file, off_t offset, | |
468 | const typename elfcpp::Ehdr<size, big_endian>& ehdr) | |
469 | : Sized_dynobj<size, big_endian>(name, input_file, offset, ehdr), | |
590b87ff | 470 | opd_shndx_(0), e_flags_(ehdr.get_e_flags()), opd_ent_() |
b4f7960d AM |
471 | { |
472 | this->set_abiversion(0); | |
473 | } | |
dc3714f3 AM |
474 | |
475 | ~Powerpc_dynobj() | |
476 | { } | |
477 | ||
478 | // Call Sized_dynobj::do_read_symbols to read the symbols then | |
479 | // read .opd from a dynamic object, filling in opd_ent_ vector, | |
480 | void | |
481 | do_read_symbols(Read_symbols_data*); | |
482 | ||
483 | // The .opd section shndx. | |
484 | unsigned int | |
485 | opd_shndx() const | |
486 | { | |
487 | return this->opd_shndx_; | |
488 | } | |
489 | ||
490 | // The .opd section address. | |
491 | Address | |
492 | opd_address() const | |
493 | { | |
494 | return this->opd_address_; | |
495 | } | |
496 | ||
497 | // Init OPD entry arrays. | |
498 | void | |
499 | init_opd(size_t opd_size) | |
500 | { | |
501 | size_t count = this->opd_ent_ndx(opd_size); | |
502 | this->opd_ent_.resize(count); | |
503 | } | |
504 | ||
505 | // Return section and offset of function entry for .opd + R_OFF. | |
506 | unsigned int | |
507 | get_opd_ent(Address r_off, Address* value = NULL) const | |
508 | { | |
509 | size_t ndx = this->opd_ent_ndx(r_off); | |
510 | gold_assert(ndx < this->opd_ent_.size()); | |
511 | gold_assert(this->opd_ent_[ndx].shndx != 0); | |
512 | if (value != NULL) | |
513 | *value = this->opd_ent_[ndx].off; | |
514 | return this->opd_ent_[ndx].shndx; | |
515 | } | |
516 | ||
517 | // Set section and offset of function entry for .opd + R_OFF. | |
518 | void | |
519 | set_opd_ent(Address r_off, unsigned int shndx, Address value) | |
520 | { | |
521 | size_t ndx = this->opd_ent_ndx(r_off); | |
522 | gold_assert(ndx < this->opd_ent_.size()); | |
523 | this->opd_ent_[ndx].shndx = shndx; | |
524 | this->opd_ent_[ndx].off = value; | |
525 | } | |
526 | ||
b4f7960d AM |
527 | int |
528 | abiversion() const | |
529 | { return this->e_flags_ & elfcpp::EF_PPC64_ABI; } | |
530 | ||
531 | // Set ABI version for input and output. | |
532 | void | |
533 | set_abiversion(int ver); | |
534 | ||
dc3714f3 AM |
535 | private: |
536 | // Used to specify extent of executable sections. | |
537 | struct Sec_info | |
538 | { | |
539 | Sec_info(Address start_, Address len_, unsigned int shndx_) | |
540 | : start(start_), len(len_), shndx(shndx_) | |
541 | { } | |
542 | ||
543 | bool | |
544 | operator<(const Sec_info& that) const | |
545 | { return this->start < that.start; } | |
546 | ||
547 | Address start; | |
548 | Address len; | |
549 | unsigned int shndx; | |
550 | }; | |
551 | ||
552 | struct Opd_ent | |
553 | { | |
554 | unsigned int shndx; | |
555 | Address off; | |
556 | }; | |
557 | ||
558 | // Return index into opd_ent_ array for .opd entry at OFF. | |
559 | size_t | |
560 | opd_ent_ndx(size_t off) const | |
561 | { return off >> 4;} | |
562 | ||
563 | // For 64-bit the .opd section shndx and address. | |
564 | unsigned int opd_shndx_; | |
565 | Address opd_address_; | |
566 | ||
590b87ff AM |
567 | // Header e_flags |
568 | elfcpp::Elf_Word e_flags_; | |
569 | ||
dc3714f3 AM |
570 | // The first 8-byte word of an OPD entry gives the address of the |
571 | // entry point of the function. Records the section and offset | |
572 | // corresponding to the address. Note that in dynamic objects, | |
573 | // offset is *not* relative to the section. | |
574 | std::vector<Opd_ent> opd_ent_; | |
575 | }; | |
576 | ||
5edad15d AM |
577 | // Powerpc_copy_relocs class. Needed to peek at dynamic relocs the |
578 | // base class will emit. | |
579 | ||
580 | template<int sh_type, int size, bool big_endian> | |
581 | class Powerpc_copy_relocs : public Copy_relocs<sh_type, size, big_endian> | |
582 | { | |
583 | public: | |
584 | Powerpc_copy_relocs() | |
585 | : Copy_relocs<sh_type, size, big_endian>(elfcpp::R_POWERPC_COPY) | |
586 | { } | |
587 | ||
588 | // Emit any saved relocations which turn out to be needed. This is | |
589 | // called after all the relocs have been scanned. | |
590 | void | |
591 | emit(Output_data_reloc<sh_type, true, size, big_endian>*); | |
592 | }; | |
593 | ||
42cacb20 DE |
594 | template<int size, bool big_endian> |
595 | class Target_powerpc : public Sized_target<size, big_endian> | |
596 | { | |
597 | public: | |
d83ce4e3 AM |
598 | typedef |
599 | Output_data_reloc<elfcpp::SHT_RELA, true, size, big_endian> Reloc_section; | |
c9269dff | 600 | typedef typename elfcpp::Elf_types<size>::Elf_Addr Address; |
dd93cd0a | 601 | typedef typename elfcpp::Elf_types<size>::Elf_Swxword Signed_address; |
7e57d19e | 602 | typedef Unordered_set<Symbol_location, Symbol_location_hash> Tocsave_loc; |
c9269dff | 603 | static const Address invalid_address = static_cast<Address>(0) - 1; |
dd93cd0a AM |
604 | // Offset of tp and dtp pointers from start of TLS block. |
605 | static const Address tp_offset = 0x7000; | |
606 | static const Address dtp_offset = 0x8000; | |
42cacb20 DE |
607 | |
608 | Target_powerpc() | |
609 | : Sized_target<size, big_endian>(&powerpc_info), | |
ec661b9d | 610 | got_(NULL), plt_(NULL), iplt_(NULL), brlt_section_(NULL), |
5edad15d | 611 | glink_(NULL), rela_dyn_(NULL), copy_relocs_(), |
43819297 | 612 | tlsld_got_offset_(-1U), |
7e57d19e | 613 | stub_tables_(), branch_lookup_table_(), branch_info_(), tocsave_loc_(), |
7ee7ff70 AM |
614 | plt_thread_safe_(false), plt_localentry0_(false), |
615 | plt_localentry0_init_(false), has_localentry0_(false), | |
616 | relax_failed_(false), relax_fail_count_(0), | |
d49044c7 | 617 | stub_group_size_(0), savres_section_(0) |
42cacb20 DE |
618 | { |
619 | } | |
620 | ||
2e702c99 | 621 | // Process the relocations to determine unreferenced sections for |
6d03d481 ST |
622 | // garbage collection. |
623 | void | |
ad0f2072 | 624 | gc_process_relocs(Symbol_table* symtab, |
2e702c99 RM |
625 | Layout* layout, |
626 | Sized_relobj_file<size, big_endian>* object, | |
627 | unsigned int data_shndx, | |
628 | unsigned int sh_type, | |
629 | const unsigned char* prelocs, | |
630 | size_t reloc_count, | |
631 | Output_section* output_section, | |
632 | bool needs_special_offset_handling, | |
633 | size_t local_symbol_count, | |
634 | const unsigned char* plocal_symbols); | |
6d03d481 | 635 | |
42cacb20 DE |
636 | // Scan the relocations to look for symbol adjustments. |
637 | void | |
ad0f2072 | 638 | scan_relocs(Symbol_table* symtab, |
42cacb20 | 639 | Layout* layout, |
6fa2a40b | 640 | Sized_relobj_file<size, big_endian>* object, |
42cacb20 DE |
641 | unsigned int data_shndx, |
642 | unsigned int sh_type, | |
643 | const unsigned char* prelocs, | |
644 | size_t reloc_count, | |
645 | Output_section* output_section, | |
646 | bool needs_special_offset_handling, | |
647 | size_t local_symbol_count, | |
648 | const unsigned char* plocal_symbols); | |
921b5322 AM |
649 | |
650 | // Map input .toc section to output .got section. | |
651 | const char* | |
652 | do_output_section_name(const Relobj*, const char* name, size_t* plen) const | |
653 | { | |
654 | if (size == 64 && strcmp(name, ".toc") == 0) | |
655 | { | |
656 | *plen = 4; | |
657 | return ".got"; | |
658 | } | |
659 | return NULL; | |
660 | } | |
661 | ||
f3a0ed29 AM |
662 | // Provide linker defined save/restore functions. |
663 | void | |
664 | define_save_restore_funcs(Layout*, Symbol_table*); | |
665 | ||
ec661b9d AM |
666 | // No stubs unless a final link. |
667 | bool | |
668 | do_may_relax() const | |
669 | { return !parameters->options().relocatable(); } | |
670 | ||
671 | bool | |
672 | do_relax(int, const Input_objects*, Symbol_table*, Layout*, const Task*); | |
673 | ||
9d5781f8 AM |
674 | void |
675 | do_plt_fde_location(const Output_data*, unsigned char*, | |
676 | uint64_t*, off_t*) const; | |
677 | ||
ec661b9d AM |
678 | // Stash info about branches, for stub generation. |
679 | void | |
680 | push_branch(Powerpc_relobj<size, big_endian>* ppc_object, | |
681 | unsigned int data_shndx, Address r_offset, | |
682 | unsigned int r_type, unsigned int r_sym, Address addend) | |
683 | { | |
684 | Branch_info info(ppc_object, data_shndx, r_offset, r_type, r_sym, addend); | |
685 | this->branch_info_.push_back(info); | |
686 | if (r_type == elfcpp::R_POWERPC_REL14 | |
687 | || r_type == elfcpp::R_POWERPC_REL14_BRTAKEN | |
688 | || r_type == elfcpp::R_POWERPC_REL14_BRNTAKEN) | |
689 | ppc_object->set_has_14bit_branch(data_shndx); | |
690 | } | |
691 | ||
7e57d19e AM |
692 | // Return whether the last branch is a plt call, and if so, mark the |
693 | // branch as having an R_PPC64_TOCSAVE. | |
694 | bool | |
695 | mark_pltcall(Powerpc_relobj<size, big_endian>* ppc_object, | |
696 | unsigned int data_shndx, Address r_offset, Symbol_table* symtab) | |
697 | { | |
698 | return (size == 64 | |
699 | && !this->branch_info_.empty() | |
700 | && this->branch_info_.back().mark_pltcall(ppc_object, data_shndx, | |
701 | r_offset, this, symtab)); | |
702 | } | |
703 | ||
704 | // Say the given location, that of a nop in a function prologue with | |
705 | // an R_PPC64_TOCSAVE reloc, will be used to save r2. | |
706 | // R_PPC64_TOCSAVE relocs on nops following calls point at this nop. | |
707 | void | |
708 | add_tocsave(Powerpc_relobj<size, big_endian>* ppc_object, | |
709 | unsigned int shndx, Address offset) | |
710 | { | |
711 | Symbol_location loc; | |
712 | loc.object = ppc_object; | |
713 | loc.shndx = shndx; | |
714 | loc.offset = offset; | |
715 | this->tocsave_loc_.insert(loc); | |
716 | } | |
717 | ||
718 | // Accessor | |
719 | const Tocsave_loc | |
720 | tocsave_loc() const | |
721 | { | |
722 | return this->tocsave_loc_; | |
723 | } | |
724 | ||
f43ba157 AM |
725 | void |
726 | do_define_standard_symbols(Symbol_table*, Layout*); | |
727 | ||
42cacb20 DE |
728 | // Finalize the sections. |
729 | void | |
f59f41f3 | 730 | do_finalize_sections(Layout*, const Input_objects*, Symbol_table*); |
42cacb20 DE |
731 | |
732 | // Return the value to use for a dynamic which requires special | |
733 | // treatment. | |
734 | uint64_t | |
735 | do_dynsym_value(const Symbol*) const; | |
736 | ||
c9824451 AM |
737 | // Return the PLT address to use for a local symbol. |
738 | uint64_t | |
739 | do_plt_address_for_local(const Relobj*, unsigned int) const; | |
740 | ||
741 | // Return the PLT address to use for a global symbol. | |
742 | uint64_t | |
743 | do_plt_address_for_global(const Symbol*) const; | |
744 | ||
bd73a62d AM |
745 | // Return the offset to use for the GOT_INDX'th got entry which is |
746 | // for a local tls symbol specified by OBJECT, SYMNDX. | |
747 | int64_t | |
748 | do_tls_offset_for_local(const Relobj* object, | |
749 | unsigned int symndx, | |
750 | unsigned int got_indx) const; | |
751 | ||
752 | // Return the offset to use for the GOT_INDX'th got entry which is | |
753 | // for global tls symbol GSYM. | |
754 | int64_t | |
755 | do_tls_offset_for_global(Symbol* gsym, unsigned int got_indx) const; | |
756 | ||
dc3714f3 AM |
757 | void |
758 | do_function_location(Symbol_location*) const; | |
759 | ||
4d9aa155 AM |
760 | bool |
761 | do_can_check_for_function_pointers() const | |
762 | { return true; } | |
763 | ||
bbec1a5d AM |
764 | // Adjust -fsplit-stack code which calls non-split-stack code. |
765 | void | |
766 | do_calls_non_split(Relobj* object, unsigned int shndx, | |
767 | section_offset_type fnoffset, section_size_type fnsize, | |
6e0813d3 | 768 | const unsigned char* prelocs, size_t reloc_count, |
bbec1a5d AM |
769 | unsigned char* view, section_size_type view_size, |
770 | std::string* from, std::string* to) const; | |
771 | ||
42cacb20 DE |
772 | // Relocate a section. |
773 | void | |
774 | relocate_section(const Relocate_info<size, big_endian>*, | |
775 | unsigned int sh_type, | |
776 | const unsigned char* prelocs, | |
777 | size_t reloc_count, | |
778 | Output_section* output_section, | |
779 | bool needs_special_offset_handling, | |
780 | unsigned char* view, | |
c9269dff | 781 | Address view_address, |
364c7fa5 ILT |
782 | section_size_type view_size, |
783 | const Reloc_symbol_changes*); | |
42cacb20 DE |
784 | |
785 | // Scan the relocs during a relocatable link. | |
786 | void | |
ad0f2072 | 787 | scan_relocatable_relocs(Symbol_table* symtab, |
42cacb20 | 788 | Layout* layout, |
6fa2a40b | 789 | Sized_relobj_file<size, big_endian>* object, |
42cacb20 DE |
790 | unsigned int data_shndx, |
791 | unsigned int sh_type, | |
792 | const unsigned char* prelocs, | |
793 | size_t reloc_count, | |
794 | Output_section* output_section, | |
795 | bool needs_special_offset_handling, | |
796 | size_t local_symbol_count, | |
797 | const unsigned char* plocal_symbols, | |
798 | Relocatable_relocs*); | |
799 | ||
4d625b70 CC |
800 | // Scan the relocs for --emit-relocs. |
801 | void | |
802 | emit_relocs_scan(Symbol_table* symtab, | |
803 | Layout* layout, | |
804 | Sized_relobj_file<size, big_endian>* object, | |
805 | unsigned int data_shndx, | |
806 | unsigned int sh_type, | |
807 | const unsigned char* prelocs, | |
808 | size_t reloc_count, | |
809 | Output_section* output_section, | |
810 | bool needs_special_offset_handling, | |
811 | size_t local_symbol_count, | |
812 | const unsigned char* plocal_syms, | |
813 | Relocatable_relocs* rr); | |
814 | ||
7404fe1b | 815 | // Emit relocations for a section. |
42cacb20 | 816 | void |
7404fe1b AM |
817 | relocate_relocs(const Relocate_info<size, big_endian>*, |
818 | unsigned int sh_type, | |
819 | const unsigned char* prelocs, | |
820 | size_t reloc_count, | |
821 | Output_section* output_section, | |
62fe925a RM |
822 | typename elfcpp::Elf_types<size>::Elf_Off |
823 | offset_in_output_section, | |
7404fe1b AM |
824 | unsigned char*, |
825 | Address view_address, | |
826 | section_size_type, | |
827 | unsigned char* reloc_view, | |
828 | section_size_type reloc_view_size); | |
42cacb20 DE |
829 | |
830 | // Return whether SYM is defined by the ABI. | |
831 | bool | |
9c2d0ef9 | 832 | do_is_defined_by_abi(const Symbol* sym) const |
42cacb20 | 833 | { |
cf43a2fe | 834 | return strcmp(sym->name(), "__tls_get_addr") == 0; |
42cacb20 DE |
835 | } |
836 | ||
837 | // Return the size of the GOT section. | |
838 | section_size_type | |
0e70b911 | 839 | got_size() const |
42cacb20 DE |
840 | { |
841 | gold_assert(this->got_ != NULL); | |
842 | return this->got_->data_size(); | |
843 | } | |
844 | ||
cf43a2fe AM |
845 | // Get the PLT section. |
846 | const Output_data_plt_powerpc<size, big_endian>* | |
847 | plt_section() const | |
848 | { | |
849 | gold_assert(this->plt_ != NULL); | |
850 | return this->plt_; | |
851 | } | |
852 | ||
e5d5f5ed AM |
853 | // Get the IPLT section. |
854 | const Output_data_plt_powerpc<size, big_endian>* | |
855 | iplt_section() const | |
856 | { | |
857 | gold_assert(this->iplt_ != NULL); | |
858 | return this->iplt_; | |
859 | } | |
860 | ||
cf43a2fe AM |
861 | // Get the .glink section. |
862 | const Output_data_glink<size, big_endian>* | |
863 | glink_section() const | |
864 | { | |
865 | gold_assert(this->glink_ != NULL); | |
866 | return this->glink_; | |
867 | } | |
868 | ||
9055360d AM |
869 | Output_data_glink<size, big_endian>* |
870 | glink_section() | |
871 | { | |
872 | gold_assert(this->glink_ != NULL); | |
873 | return this->glink_; | |
874 | } | |
875 | ||
9d5781f8 AM |
876 | bool has_glink() const |
877 | { return this->glink_ != NULL; } | |
878 | ||
cf43a2fe AM |
879 | // Get the GOT section. |
880 | const Output_data_got_powerpc<size, big_endian>* | |
881 | got_section() const | |
882 | { | |
883 | gold_assert(this->got_ != NULL); | |
884 | return this->got_; | |
885 | } | |
886 | ||
26a4e9cb AM |
887 | // Get the GOT section, creating it if necessary. |
888 | Output_data_got_powerpc<size, big_endian>* | |
889 | got_section(Symbol_table*, Layout*); | |
890 | ||
cf43a2fe AM |
891 | Object* |
892 | do_make_elf_object(const std::string&, Input_file*, off_t, | |
893 | const elfcpp::Ehdr<size, big_endian>&); | |
894 | ||
0e70b911 CC |
895 | // Return the number of entries in the GOT. |
896 | unsigned int | |
897 | got_entry_count() const | |
898 | { | |
899 | if (this->got_ == NULL) | |
900 | return 0; | |
901 | return this->got_size() / (size / 8); | |
902 | } | |
903 | ||
904 | // Return the number of entries in the PLT. | |
905 | unsigned int | |
906 | plt_entry_count() const; | |
907 | ||
908 | // Return the offset of the first non-reserved PLT entry. | |
909 | unsigned int | |
b4f7960d AM |
910 | first_plt_entry_offset() const |
911 | { | |
912 | if (size == 32) | |
913 | return 0; | |
914 | if (this->abiversion() >= 2) | |
915 | return 16; | |
916 | return 24; | |
917 | } | |
0e70b911 CC |
918 | |
919 | // Return the size of each PLT entry. | |
920 | unsigned int | |
b4f7960d AM |
921 | plt_entry_size() const |
922 | { | |
923 | if (size == 32) | |
924 | return 4; | |
925 | if (this->abiversion() >= 2) | |
926 | return 8; | |
927 | return 24; | |
928 | } | |
0e70b911 | 929 | |
d49044c7 AM |
930 | Output_data_save_res<size, big_endian>* |
931 | savres_section() const | |
932 | { | |
933 | return this->savres_section_; | |
934 | } | |
935 | ||
e81fea4d AM |
936 | // Add any special sections for this symbol to the gc work list. |
937 | // For powerpc64, this adds the code section of a function | |
938 | // descriptor. | |
939 | void | |
940 | do_gc_mark_symbol(Symbol_table* symtab, Symbol* sym) const; | |
941 | ||
942 | // Handle target specific gc actions when adding a gc reference from | |
943 | // SRC_OBJ, SRC_SHNDX to a location specified by DST_OBJ, DST_SHNDX | |
944 | // and DST_OFF. For powerpc64, this adds a referenc to the code | |
945 | // section of a function descriptor. | |
946 | void | |
947 | do_gc_add_reference(Symbol_table* symtab, | |
efc6fa12 | 948 | Relobj* src_obj, |
e81fea4d | 949 | unsigned int src_shndx, |
efc6fa12 | 950 | Relobj* dst_obj, |
e81fea4d AM |
951 | unsigned int dst_shndx, |
952 | Address dst_off) const; | |
953 | ||
ec661b9d AM |
954 | typedef std::vector<Stub_table<size, big_endian>*> Stub_tables; |
955 | const Stub_tables& | |
956 | stub_tables() const | |
957 | { return this->stub_tables_; } | |
958 | ||
959 | const Output_data_brlt_powerpc<size, big_endian>* | |
960 | brlt_section() const | |
961 | { return this->brlt_section_; } | |
962 | ||
963 | void | |
964 | add_branch_lookup_table(Address to) | |
965 | { | |
966 | unsigned int off = this->branch_lookup_table_.size() * (size / 8); | |
967 | this->branch_lookup_table_.insert(std::make_pair(to, off)); | |
968 | } | |
969 | ||
970 | Address | |
971 | find_branch_lookup_table(Address to) | |
972 | { | |
973 | typename Branch_lookup_table::const_iterator p | |
974 | = this->branch_lookup_table_.find(to); | |
975 | return p == this->branch_lookup_table_.end() ? invalid_address : p->second; | |
976 | } | |
977 | ||
978 | void | |
979 | write_branch_lookup_table(unsigned char *oview) | |
980 | { | |
981 | for (typename Branch_lookup_table::const_iterator p | |
982 | = this->branch_lookup_table_.begin(); | |
983 | p != this->branch_lookup_table_.end(); | |
984 | ++p) | |
985 | { | |
4d5effb9 | 986 | elfcpp::Swap<size, big_endian>::writeval(oview + p->second, p->first); |
ec661b9d AM |
987 | } |
988 | } | |
989 | ||
590b87ff AM |
990 | // Wrapper used after relax to define a local symbol in output data, |
991 | // from the end if value < 0. | |
992 | void | |
993 | define_local(Symbol_table* symtab, const char* name, | |
994 | Output_data* od, Address value, unsigned int symsize) | |
995 | { | |
996 | Symbol* sym | |
997 | = symtab->define_in_output_data(name, NULL, Symbol_table::PREDEFINED, | |
998 | od, value, symsize, elfcpp::STT_NOTYPE, | |
999 | elfcpp::STB_LOCAL, elfcpp::STV_HIDDEN, 0, | |
1000 | static_cast<Signed_address>(value) < 0, | |
1001 | false); | |
1002 | // We are creating this symbol late, so need to fix up things | |
1003 | // done early in Layout::finalize. | |
1004 | sym->set_dynsym_index(-1U); | |
1005 | } | |
1006 | ||
9e69ed50 AM |
1007 | bool |
1008 | plt_thread_safe() const | |
1009 | { return this->plt_thread_safe_; } | |
1010 | ||
7ee7ff70 AM |
1011 | bool |
1012 | plt_localentry0() const | |
1013 | { return this->plt_localentry0_; } | |
1014 | ||
1015 | void | |
1016 | set_has_localentry0() | |
1017 | { | |
1018 | this->has_localentry0_ = true; | |
1019 | } | |
1020 | ||
1021 | bool | |
1022 | is_elfv2_localentry0(const Symbol* gsym) const | |
1023 | { | |
1024 | return (size == 64 | |
1025 | && this->abiversion() >= 2 | |
1026 | && this->plt_localentry0() | |
1027 | && gsym->type() == elfcpp::STT_FUNC | |
1028 | && gsym->is_defined() | |
565ed01a AM |
1029 | && gsym->nonvis() >> 3 == 0 |
1030 | && !gsym->non_zero_localentry()); | |
7ee7ff70 AM |
1031 | } |
1032 | ||
1033 | bool | |
1034 | is_elfv2_localentry0(const Sized_relobj_file<size, big_endian>* object, | |
1035 | unsigned int r_sym) const | |
1036 | { | |
1037 | const Powerpc_relobj<size, big_endian>* ppc_object | |
1038 | = static_cast<const Powerpc_relobj<size, big_endian>*>(object); | |
1039 | ||
1040 | if (size == 64 | |
1041 | && this->abiversion() >= 2 | |
1042 | && this->plt_localentry0() | |
1043 | && ppc_object->st_other(r_sym) >> 5 == 0) | |
1044 | { | |
1045 | const Symbol_value<size>* psymval = object->local_symbol(r_sym); | |
1046 | bool is_ordinary; | |
1047 | if (!psymval->is_ifunc_symbol() | |
1048 | && psymval->input_shndx(&is_ordinary) != elfcpp::SHN_UNDEF | |
1049 | && is_ordinary) | |
1050 | return true; | |
1051 | } | |
1052 | return false; | |
1053 | } | |
1054 | ||
565ed01a AM |
1055 | // Remember any symbols seen with non-zero localentry, even those |
1056 | // not providing a definition | |
1057 | bool | |
1058 | resolve(Symbol* to, const elfcpp::Sym<size, big_endian>& sym, Object*, | |
1059 | const char*) | |
1060 | { | |
1061 | if (size == 64) | |
1062 | { | |
1063 | unsigned char st_other = sym.get_st_other(); | |
1064 | if ((st_other & elfcpp::STO_PPC64_LOCAL_MASK) != 0) | |
1065 | to->set_non_zero_localentry(); | |
1066 | } | |
1067 | // We haven't resolved anything, continue normal processing. | |
1068 | return false; | |
1069 | } | |
1070 | ||
b4f7960d | 1071 | int |
aacb3b6d | 1072 | abiversion() const |
b4f7960d AM |
1073 | { return this->processor_specific_flags() & elfcpp::EF_PPC64_ABI; } |
1074 | ||
1075 | void | |
aacb3b6d | 1076 | set_abiversion(int ver) |
b4f7960d AM |
1077 | { |
1078 | elfcpp::Elf_Word flags = this->processor_specific_flags(); | |
1079 | flags &= ~elfcpp::EF_PPC64_ABI; | |
1080 | flags |= ver & elfcpp::EF_PPC64_ABI; | |
1081 | this->set_processor_specific_flags(flags); | |
1082 | } | |
1083 | ||
aacb3b6d | 1084 | // Offset to toc save stack slot |
b4f7960d | 1085 | int |
aacb3b6d | 1086 | stk_toc() const |
b4f7960d AM |
1087 | { return this->abiversion() < 2 ? 40 : 24; } |
1088 | ||
42cacb20 DE |
1089 | private: |
1090 | ||
e3deeb9c AM |
1091 | class Track_tls |
1092 | { | |
1093 | public: | |
1094 | enum Tls_get_addr | |
1095 | { | |
1096 | NOT_EXPECTED = 0, | |
1097 | EXPECTED = 1, | |
1098 | SKIP = 2, | |
1099 | NORMAL = 3 | |
1100 | }; | |
1101 | ||
1102 | Track_tls() | |
aacb3b6d | 1103 | : tls_get_addr_state_(NOT_EXPECTED), |
e3deeb9c AM |
1104 | relinfo_(NULL), relnum_(0), r_offset_(0) |
1105 | { } | |
1106 | ||
1107 | ~Track_tls() | |
1108 | { | |
aacb3b6d | 1109 | if (this->tls_get_addr_state_ != NOT_EXPECTED) |
e3deeb9c AM |
1110 | this->missing(); |
1111 | } | |
1112 | ||
1113 | void | |
1114 | missing(void) | |
1115 | { | |
1116 | if (this->relinfo_ != NULL) | |
1117 | gold_error_at_location(this->relinfo_, this->relnum_, this->r_offset_, | |
1118 | _("missing expected __tls_get_addr call")); | |
1119 | } | |
1120 | ||
1121 | void | |
1122 | expect_tls_get_addr_call( | |
1123 | const Relocate_info<size, big_endian>* relinfo, | |
1124 | size_t relnum, | |
1125 | Address r_offset) | |
1126 | { | |
aacb3b6d | 1127 | this->tls_get_addr_state_ = EXPECTED; |
e3deeb9c AM |
1128 | this->relinfo_ = relinfo; |
1129 | this->relnum_ = relnum; | |
1130 | this->r_offset_ = r_offset; | |
1131 | } | |
1132 | ||
1133 | void | |
1134 | expect_tls_get_addr_call() | |
aacb3b6d | 1135 | { this->tls_get_addr_state_ = EXPECTED; } |
e3deeb9c AM |
1136 | |
1137 | void | |
1138 | skip_next_tls_get_addr_call() | |
aacb3b6d | 1139 | {this->tls_get_addr_state_ = SKIP; } |
e3deeb9c AM |
1140 | |
1141 | Tls_get_addr | |
1142 | maybe_skip_tls_get_addr_call(unsigned int r_type, const Symbol* gsym) | |
1143 | { | |
1144 | bool is_tls_call = ((r_type == elfcpp::R_POWERPC_REL24 | |
1145 | || r_type == elfcpp::R_PPC_PLTREL24) | |
1146 | && gsym != NULL | |
1147 | && strcmp(gsym->name(), "__tls_get_addr") == 0); | |
aacb3b6d AM |
1148 | Tls_get_addr last_tls = this->tls_get_addr_state_; |
1149 | this->tls_get_addr_state_ = NOT_EXPECTED; | |
e3deeb9c AM |
1150 | if (is_tls_call && last_tls != EXPECTED) |
1151 | return last_tls; | |
1152 | else if (!is_tls_call && last_tls != NOT_EXPECTED) | |
1153 | { | |
1154 | this->missing(); | |
1155 | return EXPECTED; | |
1156 | } | |
1157 | return NORMAL; | |
1158 | } | |
1159 | ||
1160 | private: | |
1161 | // What we're up to regarding calls to __tls_get_addr. | |
1162 | // On powerpc, the branch and link insn making a call to | |
1163 | // __tls_get_addr is marked with a relocation, R_PPC64_TLSGD, | |
1164 | // R_PPC64_TLSLD, R_PPC_TLSGD or R_PPC_TLSLD, in addition to the | |
1165 | // usual R_POWERPC_REL24 or R_PPC_PLTREL25 relocation on a call. | |
1166 | // The marker relocation always comes first, and has the same | |
1167 | // symbol as the reloc on the insn setting up the __tls_get_addr | |
1168 | // argument. This ties the arg setup insn with the call insn, | |
1169 | // allowing ld to safely optimize away the call. We check that | |
1170 | // every call to __tls_get_addr has a marker relocation, and that | |
1171 | // every marker relocation is on a call to __tls_get_addr. | |
aacb3b6d | 1172 | Tls_get_addr tls_get_addr_state_; |
e3deeb9c AM |
1173 | // Info about the last reloc for error message. |
1174 | const Relocate_info<size, big_endian>* relinfo_; | |
1175 | size_t relnum_; | |
1176 | Address r_offset_; | |
1177 | }; | |
1178 | ||
42cacb20 | 1179 | // The class which scans relocations. |
e3deeb9c | 1180 | class Scan : protected Track_tls |
42cacb20 DE |
1181 | { |
1182 | public: | |
bfdfa4cd AM |
1183 | typedef typename elfcpp::Elf_types<size>::Elf_Addr Address; |
1184 | ||
42cacb20 | 1185 | Scan() |
e3deeb9c | 1186 | : Track_tls(), issued_non_pic_error_(false) |
42cacb20 DE |
1187 | { } |
1188 | ||
95a2c8d6 | 1189 | static inline int |
88b8e639 | 1190 | get_reference_flags(unsigned int r_type, const Target_powerpc* target); |
95a2c8d6 | 1191 | |
42cacb20 | 1192 | inline void |
ad0f2072 | 1193 | local(Symbol_table* symtab, Layout* layout, Target_powerpc* target, |
6fa2a40b | 1194 | Sized_relobj_file<size, big_endian>* object, |
42cacb20 DE |
1195 | unsigned int data_shndx, |
1196 | Output_section* output_section, | |
1197 | const elfcpp::Rela<size, big_endian>& reloc, unsigned int r_type, | |
bfdfa4cd AM |
1198 | const elfcpp::Sym<size, big_endian>& lsym, |
1199 | bool is_discarded); | |
42cacb20 DE |
1200 | |
1201 | inline void | |
ad0f2072 | 1202 | global(Symbol_table* symtab, Layout* layout, Target_powerpc* target, |
6fa2a40b | 1203 | Sized_relobj_file<size, big_endian>* object, |
42cacb20 DE |
1204 | unsigned int data_shndx, |
1205 | Output_section* output_section, | |
1206 | const elfcpp::Rela<size, big_endian>& reloc, unsigned int r_type, | |
1207 | Symbol* gsym); | |
1208 | ||
21bb3914 ST |
1209 | inline bool |
1210 | local_reloc_may_be_function_pointer(Symbol_table* , Layout* , | |
1211 | Target_powerpc* , | |
f6971787 | 1212 | Sized_relobj_file<size, big_endian>* relobj, |
21bb3914 | 1213 | unsigned int , |
2e702c99 RM |
1214 | Output_section* , |
1215 | const elfcpp::Rela<size, big_endian>& , | |
4d9aa155 | 1216 | unsigned int r_type, |
2e702c99 | 1217 | const elfcpp::Sym<size, big_endian>&) |
4d9aa155 AM |
1218 | { |
1219 | // PowerPC64 .opd is not folded, so any identical function text | |
1220 | // may be folded and we'll still keep function addresses distinct. | |
1221 | // That means no reloc is of concern here. | |
1222 | if (size == 64) | |
f6971787 AM |
1223 | { |
1224 | Powerpc_relobj<size, big_endian>* ppcobj = static_cast | |
1225 | <Powerpc_relobj<size, big_endian>*>(relobj); | |
1226 | if (ppcobj->abiversion() == 1) | |
1227 | return false; | |
1228 | } | |
1229 | // For 32-bit and ELFv2, conservatively assume anything but calls to | |
4d9aa155 AM |
1230 | // function code might be taking the address of the function. |
1231 | return !is_branch_reloc(r_type); | |
1232 | } | |
21bb3914 ST |
1233 | |
1234 | inline bool | |
1235 | global_reloc_may_be_function_pointer(Symbol_table* , Layout* , | |
1236 | Target_powerpc* , | |
f6971787 | 1237 | Sized_relobj_file<size, big_endian>* relobj, |
2e702c99 RM |
1238 | unsigned int , |
1239 | Output_section* , | |
4d9aa155 AM |
1240 | const elfcpp::Rela<size, big_endian>& , |
1241 | unsigned int r_type, | |
1242 | Symbol*) | |
1243 | { | |
1244 | // As above. | |
1245 | if (size == 64) | |
f6971787 AM |
1246 | { |
1247 | Powerpc_relobj<size, big_endian>* ppcobj = static_cast | |
1248 | <Powerpc_relobj<size, big_endian>*>(relobj); | |
1249 | if (ppcobj->abiversion() == 1) | |
1250 | return false; | |
1251 | } | |
4d9aa155 AM |
1252 | return !is_branch_reloc(r_type); |
1253 | } | |
21bb3914 | 1254 | |
b3ccdeb5 | 1255 | static bool |
9055360d AM |
1256 | reloc_needs_plt_for_ifunc(Target_powerpc<size, big_endian>* target, |
1257 | Sized_relobj_file<size, big_endian>* object, | |
b3ccdeb5 AM |
1258 | unsigned int r_type, bool report_err); |
1259 | ||
42cacb20 DE |
1260 | private: |
1261 | static void | |
6fa2a40b | 1262 | unsupported_reloc_local(Sized_relobj_file<size, big_endian>*, |
42cacb20 DE |
1263 | unsigned int r_type); |
1264 | ||
1265 | static void | |
6fa2a40b | 1266 | unsupported_reloc_global(Sized_relobj_file<size, big_endian>*, |
42cacb20 DE |
1267 | unsigned int r_type, Symbol*); |
1268 | ||
1269 | static void | |
1270 | generate_tls_call(Symbol_table* symtab, Layout* layout, | |
1271 | Target_powerpc* target); | |
1272 | ||
1273 | void | |
1274 | check_non_pic(Relobj*, unsigned int r_type); | |
1275 | ||
1276 | // Whether we have issued an error about a non-PIC compilation. | |
1277 | bool issued_non_pic_error_; | |
1278 | }; | |
1279 | ||
1611bc4a AM |
1280 | bool |
1281 | symval_for_branch(const Symbol_table* symtab, | |
6c77229c | 1282 | const Sized_symbol<size>* gsym, |
3ea0a085 | 1283 | Powerpc_relobj<size, big_endian>* object, |
1611bc4a | 1284 | Address *value, unsigned int *dest_shndx); |
3ea0a085 | 1285 | |
42cacb20 | 1286 | // The class which implements relocation. |
e3deeb9c | 1287 | class Relocate : protected Track_tls |
42cacb20 DE |
1288 | { |
1289 | public: | |
dd93cd0a AM |
1290 | // Use 'at' branch hints when true, 'y' when false. |
1291 | // FIXME maybe: set this with an option. | |
1292 | static const bool is_isa_v2 = true; | |
1293 | ||
dd93cd0a | 1294 | Relocate() |
e3deeb9c | 1295 | : Track_tls() |
dd93cd0a AM |
1296 | { } |
1297 | ||
42cacb20 DE |
1298 | // Do a relocation. Return false if the caller should not issue |
1299 | // any warnings about this relocation. | |
1300 | inline bool | |
91a65d2f AM |
1301 | relocate(const Relocate_info<size, big_endian>*, unsigned int, |
1302 | Target_powerpc*, Output_section*, size_t, const unsigned char*, | |
1303 | const Sized_symbol<size>*, const Symbol_value<size>*, | |
1304 | unsigned char*, typename elfcpp::Elf_types<size>::Elf_Addr, | |
42cacb20 | 1305 | section_size_type); |
42cacb20 DE |
1306 | }; |
1307 | ||
168a4726 AM |
1308 | class Relocate_comdat_behavior |
1309 | { | |
1310 | public: | |
1311 | // Decide what the linker should do for relocations that refer to | |
1312 | // discarded comdat sections. | |
1313 | inline Comdat_behavior | |
1314 | get(const char* name) | |
1315 | { | |
1316 | gold::Default_comdat_behavior default_behavior; | |
1317 | Comdat_behavior ret = default_behavior.get(name); | |
1318 | if (ret == CB_WARNING) | |
1319 | { | |
1320 | if (size == 32 | |
1321 | && (strcmp(name, ".fixup") == 0 | |
1322 | || strcmp(name, ".got2") == 0)) | |
1323 | ret = CB_IGNORE; | |
1324 | if (size == 64 | |
1325 | && (strcmp(name, ".opd") == 0 | |
1326 | || strcmp(name, ".toc") == 0 | |
1327 | || strcmp(name, ".toc1") == 0)) | |
1328 | ret = CB_IGNORE; | |
1329 | } | |
1330 | return ret; | |
1331 | } | |
1332 | }; | |
1333 | ||
dd93cd0a AM |
1334 | // Optimize the TLS relocation type based on what we know about the |
1335 | // symbol. IS_FINAL is true if the final address of this symbol is | |
1336 | // known at link time. | |
1337 | ||
1338 | tls::Tls_optimization | |
1339 | optimize_tls_gd(bool is_final) | |
1340 | { | |
1341 | // If we are generating a shared library, then we can't do anything | |
1342 | // in the linker. | |
aacb3b6d AM |
1343 | if (parameters->options().shared() |
1344 | || !parameters->options().tls_optimize()) | |
dd93cd0a AM |
1345 | return tls::TLSOPT_NONE; |
1346 | ||
1347 | if (!is_final) | |
1348 | return tls::TLSOPT_TO_IE; | |
1349 | return tls::TLSOPT_TO_LE; | |
1350 | } | |
1351 | ||
1352 | tls::Tls_optimization | |
1353 | optimize_tls_ld() | |
1354 | { | |
aacb3b6d AM |
1355 | if (parameters->options().shared() |
1356 | || !parameters->options().tls_optimize()) | |
dd93cd0a AM |
1357 | return tls::TLSOPT_NONE; |
1358 | ||
1359 | return tls::TLSOPT_TO_LE; | |
1360 | } | |
1361 | ||
1362 | tls::Tls_optimization | |
1363 | optimize_tls_ie(bool is_final) | |
1364 | { | |
aacb3b6d AM |
1365 | if (!is_final |
1366 | || parameters->options().shared() | |
1367 | || !parameters->options().tls_optimize()) | |
dd93cd0a AM |
1368 | return tls::TLSOPT_NONE; |
1369 | ||
1370 | return tls::TLSOPT_TO_LE; | |
1371 | } | |
cf43a2fe | 1372 | |
cf43a2fe AM |
1373 | // Create glink. |
1374 | void | |
1375 | make_glink_section(Layout*); | |
42cacb20 | 1376 | |
cf43a2fe AM |
1377 | // Create the PLT section. |
1378 | void | |
40b469d7 | 1379 | make_plt_section(Symbol_table*, Layout*); |
42cacb20 | 1380 | |
e5d5f5ed | 1381 | void |
40b469d7 | 1382 | make_iplt_section(Symbol_table*, Layout*); |
e5d5f5ed | 1383 | |
ec661b9d AM |
1384 | void |
1385 | make_brlt_section(Layout*); | |
1386 | ||
42cacb20 DE |
1387 | // Create a PLT entry for a global symbol. |
1388 | void | |
ec661b9d | 1389 | make_plt_entry(Symbol_table*, Layout*, Symbol*); |
e5d5f5ed AM |
1390 | |
1391 | // Create a PLT entry for a local IFUNC symbol. | |
1392 | void | |
40b469d7 | 1393 | make_local_ifunc_plt_entry(Symbol_table*, Layout*, |
ec661b9d AM |
1394 | Sized_relobj_file<size, big_endian>*, |
1395 | unsigned int); | |
1396 | ||
42cacb20 | 1397 | |
dd93cd0a AM |
1398 | // Create a GOT entry for local dynamic __tls_get_addr. |
1399 | unsigned int | |
1400 | tlsld_got_offset(Symbol_table* symtab, Layout* layout, | |
1401 | Sized_relobj_file<size, big_endian>* object); | |
1402 | ||
42cacb20 | 1403 | unsigned int |
dd93cd0a AM |
1404 | tlsld_got_offset() const |
1405 | { | |
1406 | return this->tlsld_got_offset_; | |
1407 | } | |
42cacb20 | 1408 | |
42cacb20 DE |
1409 | // Get the dynamic reloc section, creating it if necessary. |
1410 | Reloc_section* | |
1411 | rela_dyn_section(Layout*); | |
1412 | ||
b3ccdeb5 AM |
1413 | // Similarly, but for ifunc symbols get the one for ifunc. |
1414 | Reloc_section* | |
1415 | rela_dyn_section(Symbol_table*, Layout*, bool for_ifunc); | |
1416 | ||
42cacb20 DE |
1417 | // Copy a relocation against a global symbol. |
1418 | void | |
ef9beddf | 1419 | copy_reloc(Symbol_table* symtab, Layout* layout, |
2e702c99 | 1420 | Sized_relobj_file<size, big_endian>* object, |
42cacb20 DE |
1421 | unsigned int shndx, Output_section* output_section, |
1422 | Symbol* sym, const elfcpp::Rela<size, big_endian>& reloc) | |
1423 | { | |
859d7987 | 1424 | unsigned int r_type = elfcpp::elf_r_type<size>(reloc.get_r_info()); |
42cacb20 DE |
1425 | this->copy_relocs_.copy_reloc(symtab, layout, |
1426 | symtab->get_sized_symbol<size>(sym), | |
1427 | object, shndx, output_section, | |
859d7987 CC |
1428 | r_type, reloc.get_r_offset(), |
1429 | reloc.get_r_addend(), | |
1430 | this->rela_dyn_section(layout)); | |
42cacb20 DE |
1431 | } |
1432 | ||
0cfdc767 | 1433 | // Look over all the input sections, deciding where to place stubs. |
ec661b9d | 1434 | void |
a3e60ddb | 1435 | group_sections(Layout*, const Task*, bool); |
ec661b9d AM |
1436 | |
1437 | // Sort output sections by address. | |
1438 | struct Sort_sections | |
1439 | { | |
1440 | bool | |
1441 | operator()(const Output_section* sec1, const Output_section* sec2) | |
1442 | { return sec1->address() < sec2->address(); } | |
1443 | }; | |
1444 | ||
1445 | class Branch_info | |
1446 | { | |
1447 | public: | |
1448 | Branch_info(Powerpc_relobj<size, big_endian>* ppc_object, | |
1449 | unsigned int data_shndx, | |
1450 | Address r_offset, | |
1451 | unsigned int r_type, | |
1452 | unsigned int r_sym, | |
1453 | Address addend) | |
1454 | : object_(ppc_object), shndx_(data_shndx), offset_(r_offset), | |
7e57d19e | 1455 | r_type_(r_type), tocsave_ (0), r_sym_(r_sym), addend_(addend) |
ec661b9d AM |
1456 | { } |
1457 | ||
1458 | ~Branch_info() | |
1459 | { } | |
1460 | ||
7e57d19e AM |
1461 | // Return whether this branch is going via a plt call stub, and if |
1462 | // so, mark it as having an R_PPC64_TOCSAVE. | |
1463 | bool | |
1464 | mark_pltcall(Powerpc_relobj<size, big_endian>* ppc_object, | |
1465 | unsigned int shndx, Address offset, | |
1466 | Target_powerpc* target, Symbol_table* symtab); | |
1467 | ||
ec661b9d | 1468 | // If this branch needs a plt call stub, or a long branch stub, make one. |
a3e60ddb | 1469 | bool |
ec661b9d AM |
1470 | make_stub(Stub_table<size, big_endian>*, |
1471 | Stub_table<size, big_endian>*, | |
1472 | Symbol_table*) const; | |
1473 | ||
1474 | private: | |
1475 | // The branch location.. | |
1476 | Powerpc_relobj<size, big_endian>* object_; | |
1477 | unsigned int shndx_; | |
1478 | Address offset_; | |
1479 | // ..and the branch type and destination. | |
7e57d19e AM |
1480 | unsigned int r_type_ : 31; |
1481 | unsigned int tocsave_ : 1; | |
ec661b9d AM |
1482 | unsigned int r_sym_; |
1483 | Address addend_; | |
1484 | }; | |
1485 | ||
42cacb20 DE |
1486 | // Information about this specific target which we pass to the |
1487 | // general Target structure. | |
1488 | static Target::Target_info powerpc_info; | |
1489 | ||
1490 | // The types of GOT entries needed for this platform. | |
0e70b911 CC |
1491 | // These values are exposed to the ABI in an incremental link. |
1492 | // Do not renumber existing values without changing the version | |
1493 | // number of the .gnu_incremental_inputs section. | |
42cacb20 DE |
1494 | enum Got_type |
1495 | { | |
dd93cd0a AM |
1496 | GOT_TYPE_STANDARD, |
1497 | GOT_TYPE_TLSGD, // double entry for @got@tlsgd | |
1498 | GOT_TYPE_DTPREL, // entry for @got@dtprel | |
1499 | GOT_TYPE_TPREL // entry for @got@tprel | |
42cacb20 DE |
1500 | }; |
1501 | ||
ec661b9d | 1502 | // The GOT section. |
cf43a2fe | 1503 | Output_data_got_powerpc<size, big_endian>* got_; |
b3ccdeb5 AM |
1504 | // The PLT section. This is a container for a table of addresses, |
1505 | // and their relocations. Each address in the PLT has a dynamic | |
1506 | // relocation (R_*_JMP_SLOT) and each address will have a | |
1507 | // corresponding entry in .glink for lazy resolution of the PLT. | |
1508 | // ppc32 initialises the PLT to point at the .glink entry, while | |
1509 | // ppc64 leaves this to ld.so. To make a call via the PLT, the | |
1510 | // linker adds a stub that loads the PLT entry into ctr then | |
1511 | // branches to ctr. There may be more than one stub for each PLT | |
1512 | // entry. DT_JMPREL points at the first PLT dynamic relocation and | |
1513 | // DT_PLTRELSZ gives the total size of PLT dynamic relocations. | |
42cacb20 | 1514 | Output_data_plt_powerpc<size, big_endian>* plt_; |
b3ccdeb5 AM |
1515 | // The IPLT section. Like plt_, this is a container for a table of |
1516 | // addresses and their relocations, specifically for STT_GNU_IFUNC | |
1517 | // functions that resolve locally (STT_GNU_IFUNC functions that | |
1518 | // don't resolve locally go in PLT). Unlike plt_, these have no | |
1519 | // entry in .glink for lazy resolution, and the relocation section | |
1520 | // does not have a 1-1 correspondence with IPLT addresses. In fact, | |
1521 | // the relocation section may contain relocations against | |
1522 | // STT_GNU_IFUNC symbols at locations outside of IPLT. The | |
1523 | // relocation section will appear at the end of other dynamic | |
1524 | // relocations, so that ld.so applies these relocations after other | |
1525 | // dynamic relocations. In a static executable, the relocation | |
1526 | // section is emitted and marked with __rela_iplt_start and | |
1527 | // __rela_iplt_end symbols. | |
e5d5f5ed | 1528 | Output_data_plt_powerpc<size, big_endian>* iplt_; |
ec661b9d AM |
1529 | // Section holding long branch destinations. |
1530 | Output_data_brlt_powerpc<size, big_endian>* brlt_section_; | |
1531 | // The .glink section. | |
cf43a2fe | 1532 | Output_data_glink<size, big_endian>* glink_; |
ec661b9d | 1533 | // The dynamic reloc section. |
42cacb20 DE |
1534 | Reloc_section* rela_dyn_; |
1535 | // Relocs saved to avoid a COPY reloc. | |
5edad15d | 1536 | Powerpc_copy_relocs<elfcpp::SHT_RELA, size, big_endian> copy_relocs_; |
dd93cd0a AM |
1537 | // Offset of the GOT entry for local dynamic __tls_get_addr calls. |
1538 | unsigned int tlsld_got_offset_; | |
ec661b9d AM |
1539 | |
1540 | Stub_tables stub_tables_; | |
1541 | typedef Unordered_map<Address, unsigned int> Branch_lookup_table; | |
1542 | Branch_lookup_table branch_lookup_table_; | |
1543 | ||
1544 | typedef std::vector<Branch_info> Branches; | |
1545 | Branches branch_info_; | |
7e57d19e | 1546 | Tocsave_loc tocsave_loc_; |
9e69ed50 AM |
1547 | |
1548 | bool plt_thread_safe_; | |
7ee7ff70 AM |
1549 | bool plt_localentry0_; |
1550 | bool plt_localentry0_init_; | |
1551 | bool has_localentry0_; | |
a3e60ddb AM |
1552 | |
1553 | bool relax_failed_; | |
1554 | int relax_fail_count_; | |
1555 | int32_t stub_group_size_; | |
d49044c7 AM |
1556 | |
1557 | Output_data_save_res<size, big_endian> *savres_section_; | |
42cacb20 DE |
1558 | }; |
1559 | ||
1560 | template<> | |
1561 | Target::Target_info Target_powerpc<32, true>::powerpc_info = | |
1562 | { | |
1563 | 32, // size | |
1564 | true, // is_big_endian | |
1565 | elfcpp::EM_PPC, // machine_code | |
1566 | false, // has_make_symbol | |
1567 | false, // has_resolve | |
1568 | false, // has_code_fill | |
1569 | true, // is_default_stack_executable | |
b3ce541e | 1570 | false, // can_icf_inline_merge_sections |
42cacb20 DE |
1571 | '\0', // wrap_char |
1572 | "/usr/lib/ld.so.1", // dynamic_linker | |
1573 | 0x10000000, // default_text_segment_address | |
1574 | 64 * 1024, // abi_pagesize (overridable by -z max-page-size) | |
8a5e3e08 | 1575 | 4 * 1024, // common_pagesize (overridable by -z common-page-size) |
c9269dff AM |
1576 | false, // isolate_execinstr |
1577 | 0, // rosegment_gap | |
8a5e3e08 ILT |
1578 | elfcpp::SHN_UNDEF, // small_common_shndx |
1579 | elfcpp::SHN_UNDEF, // large_common_shndx | |
1580 | 0, // small_common_section_flags | |
05a352e6 DK |
1581 | 0, // large_common_section_flags |
1582 | NULL, // attributes_section | |
a67858e0 | 1583 | NULL, // attributes_vendor |
8d9743bd MK |
1584 | "_start", // entry_symbol_name |
1585 | 32, // hash_entry_size | |
42cacb20 DE |
1586 | }; |
1587 | ||
1588 | template<> | |
1589 | Target::Target_info Target_powerpc<32, false>::powerpc_info = | |
1590 | { | |
1591 | 32, // size | |
1592 | false, // is_big_endian | |
1593 | elfcpp::EM_PPC, // machine_code | |
1594 | false, // has_make_symbol | |
1595 | false, // has_resolve | |
1596 | false, // has_code_fill | |
1597 | true, // is_default_stack_executable | |
b3ce541e | 1598 | false, // can_icf_inline_merge_sections |
42cacb20 DE |
1599 | '\0', // wrap_char |
1600 | "/usr/lib/ld.so.1", // dynamic_linker | |
1601 | 0x10000000, // default_text_segment_address | |
1602 | 64 * 1024, // abi_pagesize (overridable by -z max-page-size) | |
8a5e3e08 | 1603 | 4 * 1024, // common_pagesize (overridable by -z common-page-size) |
c9269dff AM |
1604 | false, // isolate_execinstr |
1605 | 0, // rosegment_gap | |
8a5e3e08 ILT |
1606 | elfcpp::SHN_UNDEF, // small_common_shndx |
1607 | elfcpp::SHN_UNDEF, // large_common_shndx | |
1608 | 0, // small_common_section_flags | |
05a352e6 DK |
1609 | 0, // large_common_section_flags |
1610 | NULL, // attributes_section | |
a67858e0 | 1611 | NULL, // attributes_vendor |
8d9743bd MK |
1612 | "_start", // entry_symbol_name |
1613 | 32, // hash_entry_size | |
42cacb20 DE |
1614 | }; |
1615 | ||
1616 | template<> | |
1617 | Target::Target_info Target_powerpc<64, true>::powerpc_info = | |
1618 | { | |
1619 | 64, // size | |
1620 | true, // is_big_endian | |
1621 | elfcpp::EM_PPC64, // machine_code | |
1622 | false, // has_make_symbol | |
565ed01a | 1623 | true, // has_resolve |
42cacb20 DE |
1624 | false, // has_code_fill |
1625 | true, // is_default_stack_executable | |
b3ce541e | 1626 | false, // can_icf_inline_merge_sections |
42cacb20 DE |
1627 | '\0', // wrap_char |
1628 | "/usr/lib/ld.so.1", // dynamic_linker | |
1629 | 0x10000000, // default_text_segment_address | |
1630 | 64 * 1024, // abi_pagesize (overridable by -z max-page-size) | |
dd93cd0a | 1631 | 4 * 1024, // common_pagesize (overridable by -z common-page-size) |
c9269dff AM |
1632 | false, // isolate_execinstr |
1633 | 0, // rosegment_gap | |
8a5e3e08 ILT |
1634 | elfcpp::SHN_UNDEF, // small_common_shndx |
1635 | elfcpp::SHN_UNDEF, // large_common_shndx | |
1636 | 0, // small_common_section_flags | |
05a352e6 DK |
1637 | 0, // large_common_section_flags |
1638 | NULL, // attributes_section | |
a67858e0 | 1639 | NULL, // attributes_vendor |
8d9743bd MK |
1640 | "_start", // entry_symbol_name |
1641 | 32, // hash_entry_size | |
42cacb20 DE |
1642 | }; |
1643 | ||
1644 | template<> | |
1645 | Target::Target_info Target_powerpc<64, false>::powerpc_info = | |
1646 | { | |
1647 | 64, // size | |
1648 | false, // is_big_endian | |
1649 | elfcpp::EM_PPC64, // machine_code | |
1650 | false, // has_make_symbol | |
565ed01a | 1651 | true, // has_resolve |
42cacb20 DE |
1652 | false, // has_code_fill |
1653 | true, // is_default_stack_executable | |
b3ce541e | 1654 | false, // can_icf_inline_merge_sections |
42cacb20 DE |
1655 | '\0', // wrap_char |
1656 | "/usr/lib/ld.so.1", // dynamic_linker | |
1657 | 0x10000000, // default_text_segment_address | |
1658 | 64 * 1024, // abi_pagesize (overridable by -z max-page-size) | |
dd93cd0a | 1659 | 4 * 1024, // common_pagesize (overridable by -z common-page-size) |
c9269dff AM |
1660 | false, // isolate_execinstr |
1661 | 0, // rosegment_gap | |
8a5e3e08 ILT |
1662 | elfcpp::SHN_UNDEF, // small_common_shndx |
1663 | elfcpp::SHN_UNDEF, // large_common_shndx | |
1664 | 0, // small_common_section_flags | |
05a352e6 DK |
1665 | 0, // large_common_section_flags |
1666 | NULL, // attributes_section | |
a67858e0 | 1667 | NULL, // attributes_vendor |
8d9743bd MK |
1668 | "_start", // entry_symbol_name |
1669 | 32, // hash_entry_size | |
42cacb20 DE |
1670 | }; |
1671 | ||
dd93cd0a AM |
1672 | inline bool |
1673 | is_branch_reloc(unsigned int r_type) | |
1674 | { | |
1675 | return (r_type == elfcpp::R_POWERPC_REL24 | |
1676 | || r_type == elfcpp::R_PPC_PLTREL24 | |
1677 | || r_type == elfcpp::R_PPC_LOCAL24PC | |
1678 | || r_type == elfcpp::R_POWERPC_REL14 | |
1679 | || r_type == elfcpp::R_POWERPC_REL14_BRTAKEN | |
1680 | || r_type == elfcpp::R_POWERPC_REL14_BRNTAKEN | |
1681 | || r_type == elfcpp::R_POWERPC_ADDR24 | |
1682 | || r_type == elfcpp::R_POWERPC_ADDR14 | |
1683 | || r_type == elfcpp::R_POWERPC_ADDR14_BRTAKEN | |
1684 | || r_type == elfcpp::R_POWERPC_ADDR14_BRNTAKEN); | |
1685 | } | |
1686 | ||
1687 | // If INSN is an opcode that may be used with an @tls operand, return | |
1688 | // the transformed insn for TLS optimisation, otherwise return 0. If | |
1689 | // REG is non-zero only match an insn with RB or RA equal to REG. | |
1690 | uint32_t | |
1691 | at_tls_transform(uint32_t insn, unsigned int reg) | |
1692 | { | |
1693 | if ((insn & (0x3f << 26)) != 31 << 26) | |
1694 | return 0; | |
1695 | ||
1696 | unsigned int rtra; | |
1697 | if (reg == 0 || ((insn >> 11) & 0x1f) == reg) | |
1698 | rtra = insn & ((1 << 26) - (1 << 16)); | |
1699 | else if (((insn >> 16) & 0x1f) == reg) | |
1700 | rtra = (insn & (0x1f << 21)) | ((insn & (0x1f << 11)) << 5); | |
1701 | else | |
1702 | return 0; | |
1703 | ||
1704 | if ((insn & (0x3ff << 1)) == 266 << 1) | |
1705 | // add -> addi | |
1706 | insn = 14 << 26; | |
1707 | else if ((insn & (0x1f << 1)) == 23 << 1 | |
1708 | && ((insn & (0x1f << 6)) < 14 << 6 | |
1709 | || ((insn & (0x1f << 6)) >= 16 << 6 | |
1710 | && (insn & (0x1f << 6)) < 24 << 6))) | |
1711 | // load and store indexed -> dform | |
1712 | insn = (32 | ((insn >> 6) & 0x1f)) << 26; | |
1713 | else if ((insn & (((0x1a << 5) | 0x1f) << 1)) == 21 << 1) | |
1714 | // ldx, ldux, stdx, stdux -> ld, ldu, std, stdu | |
1715 | insn = ((58 | ((insn >> 6) & 4)) << 26) | ((insn >> 6) & 1); | |
1716 | else if ((insn & (((0x1f << 5) | 0x1f) << 1)) == 341 << 1) | |
1717 | // lwax -> lwa | |
1718 | insn = (58 << 26) | 2; | |
1719 | else | |
1720 | return 0; | |
1721 | insn |= rtra; | |
1722 | return insn; | |
1723 | } | |
1724 | ||
dd93cd0a | 1725 | |
42cacb20 DE |
1726 | template<int size, bool big_endian> |
1727 | class Powerpc_relocate_functions | |
1728 | { | |
dd93cd0a | 1729 | public: |
f4baf0d4 | 1730 | enum Overflow_check |
dd93cd0a | 1731 | { |
f4baf0d4 AM |
1732 | CHECK_NONE, |
1733 | CHECK_SIGNED, | |
b80eed39 AM |
1734 | CHECK_UNSIGNED, |
1735 | CHECK_BITFIELD, | |
1736 | CHECK_LOW_INSN, | |
1737 | CHECK_HIGH_INSN | |
dd93cd0a AM |
1738 | }; |
1739 | ||
f4baf0d4 | 1740 | enum Status |
dd93cd0a | 1741 | { |
f4baf0d4 AM |
1742 | STATUS_OK, |
1743 | STATUS_OVERFLOW | |
1744 | }; | |
dd93cd0a | 1745 | |
42cacb20 | 1746 | private: |
c9269dff | 1747 | typedef Powerpc_relocate_functions<size, big_endian> This; |
c9269dff | 1748 | typedef typename elfcpp::Elf_types<size>::Elf_Addr Address; |
a680de9a | 1749 | typedef typename elfcpp::Elf_types<size>::Elf_Swxword SignedAddress; |
c9269dff | 1750 | |
dd93cd0a AM |
1751 | template<int valsize> |
1752 | static inline bool | |
1753 | has_overflow_signed(Address value) | |
1754 | { | |
1755 | // limit = 1 << (valsize - 1) without shift count exceeding size of type | |
1756 | Address limit = static_cast<Address>(1) << ((valsize - 1) >> 1); | |
1757 | limit <<= ((valsize - 1) >> 1); | |
1758 | limit <<= ((valsize - 1) - 2 * ((valsize - 1) >> 1)); | |
1759 | return value + limit > (limit << 1) - 1; | |
1760 | } | |
1761 | ||
1762 | template<int valsize> | |
1763 | static inline bool | |
b80eed39 | 1764 | has_overflow_unsigned(Address value) |
dd93cd0a AM |
1765 | { |
1766 | Address limit = static_cast<Address>(1) << ((valsize - 1) >> 1); | |
1767 | limit <<= ((valsize - 1) >> 1); | |
1768 | limit <<= ((valsize - 1) - 2 * ((valsize - 1) >> 1)); | |
b80eed39 AM |
1769 | return value > (limit << 1) - 1; |
1770 | } | |
1771 | ||
1772 | template<int valsize> | |
1773 | static inline bool | |
1774 | has_overflow_bitfield(Address value) | |
1775 | { | |
1776 | return (has_overflow_unsigned<valsize>(value) | |
1777 | && has_overflow_signed<valsize>(value)); | |
dd93cd0a AM |
1778 | } |
1779 | ||
1780 | template<int valsize> | |
f4baf0d4 AM |
1781 | static inline Status |
1782 | overflowed(Address value, Overflow_check overflow) | |
dd93cd0a | 1783 | { |
f4baf0d4 | 1784 | if (overflow == CHECK_SIGNED) |
dd93cd0a AM |
1785 | { |
1786 | if (has_overflow_signed<valsize>(value)) | |
f4baf0d4 | 1787 | return STATUS_OVERFLOW; |
dd93cd0a | 1788 | } |
b80eed39 AM |
1789 | else if (overflow == CHECK_UNSIGNED) |
1790 | { | |
1791 | if (has_overflow_unsigned<valsize>(value)) | |
1792 | return STATUS_OVERFLOW; | |
1793 | } | |
f4baf0d4 | 1794 | else if (overflow == CHECK_BITFIELD) |
dd93cd0a AM |
1795 | { |
1796 | if (has_overflow_bitfield<valsize>(value)) | |
f4baf0d4 | 1797 | return STATUS_OVERFLOW; |
dd93cd0a | 1798 | } |
f4baf0d4 | 1799 | return STATUS_OK; |
dd93cd0a AM |
1800 | } |
1801 | ||
cf43a2fe | 1802 | // Do a simple RELA relocation |
0cfb0717 | 1803 | template<int fieldsize, int valsize> |
f4baf0d4 AM |
1804 | static inline Status |
1805 | rela(unsigned char* view, Address value, Overflow_check overflow) | |
dd93cd0a | 1806 | { |
0cfb0717 | 1807 | typedef typename elfcpp::Swap<fieldsize, big_endian>::Valtype Valtype; |
dd93cd0a | 1808 | Valtype* wv = reinterpret_cast<Valtype*>(view); |
0cfb0717 | 1809 | elfcpp::Swap<fieldsize, big_endian>::writeval(wv, value); |
dd93cd0a AM |
1810 | return overflowed<valsize>(value, overflow); |
1811 | } | |
1812 | ||
0cfb0717 | 1813 | template<int fieldsize, int valsize> |
f4baf0d4 | 1814 | static inline Status |
42cacb20 DE |
1815 | rela(unsigned char* view, |
1816 | unsigned int right_shift, | |
0cfb0717 | 1817 | typename elfcpp::Valtype_base<fieldsize>::Valtype dst_mask, |
c9269dff | 1818 | Address value, |
f4baf0d4 | 1819 | Overflow_check overflow) |
42cacb20 | 1820 | { |
0cfb0717 | 1821 | typedef typename elfcpp::Swap<fieldsize, big_endian>::Valtype Valtype; |
42cacb20 | 1822 | Valtype* wv = reinterpret_cast<Valtype*>(view); |
0cfb0717 | 1823 | Valtype val = elfcpp::Swap<fieldsize, big_endian>::readval(wv); |
dd93cd0a | 1824 | Valtype reloc = value >> right_shift; |
42cacb20 DE |
1825 | val &= ~dst_mask; |
1826 | reloc &= dst_mask; | |
0cfb0717 | 1827 | elfcpp::Swap<fieldsize, big_endian>::writeval(wv, val | reloc); |
dd93cd0a | 1828 | return overflowed<valsize>(value >> right_shift, overflow); |
42cacb20 DE |
1829 | } |
1830 | ||
cf43a2fe | 1831 | // Do a simple RELA relocation, unaligned. |
0cfb0717 | 1832 | template<int fieldsize, int valsize> |
f4baf0d4 AM |
1833 | static inline Status |
1834 | rela_ua(unsigned char* view, Address value, Overflow_check overflow) | |
dd93cd0a | 1835 | { |
0cfb0717 | 1836 | elfcpp::Swap_unaligned<fieldsize, big_endian>::writeval(view, value); |
dd93cd0a AM |
1837 | return overflowed<valsize>(value, overflow); |
1838 | } | |
1839 | ||
0cfb0717 | 1840 | template<int fieldsize, int valsize> |
f4baf0d4 | 1841 | static inline Status |
cf43a2fe AM |
1842 | rela_ua(unsigned char* view, |
1843 | unsigned int right_shift, | |
0cfb0717 | 1844 | typename elfcpp::Valtype_base<fieldsize>::Valtype dst_mask, |
c9269dff | 1845 | Address value, |
f4baf0d4 | 1846 | Overflow_check overflow) |
42cacb20 | 1847 | { |
0cfb0717 | 1848 | typedef typename elfcpp::Swap_unaligned<fieldsize, big_endian>::Valtype |
c9269dff | 1849 | Valtype; |
0cfb0717 | 1850 | Valtype val = elfcpp::Swap<fieldsize, big_endian>::readval(view); |
dd93cd0a | 1851 | Valtype reloc = value >> right_shift; |
42cacb20 DE |
1852 | val &= ~dst_mask; |
1853 | reloc &= dst_mask; | |
0cfb0717 | 1854 | elfcpp::Swap_unaligned<fieldsize, big_endian>::writeval(view, val | reloc); |
dd93cd0a | 1855 | return overflowed<valsize>(value >> right_shift, overflow); |
42cacb20 DE |
1856 | } |
1857 | ||
42cacb20 | 1858 | public: |
dd93cd0a | 1859 | // R_PPC64_ADDR64: (Symbol + Addend) |
42cacb20 | 1860 | static inline void |
dd93cd0a | 1861 | addr64(unsigned char* view, Address value) |
0cfb0717 | 1862 | { This::template rela<64,64>(view, value, CHECK_NONE); } |
42cacb20 | 1863 | |
dd93cd0a | 1864 | // R_PPC64_UADDR64: (Symbol + Addend) unaligned |
42cacb20 | 1865 | static inline void |
dd93cd0a | 1866 | addr64_u(unsigned char* view, Address value) |
0cfb0717 | 1867 | { This::template rela_ua<64,64>(view, value, CHECK_NONE); } |
dd93cd0a AM |
1868 | |
1869 | // R_POWERPC_ADDR32: (Symbol + Addend) | |
f4baf0d4 AM |
1870 | static inline Status |
1871 | addr32(unsigned char* view, Address value, Overflow_check overflow) | |
0cfb0717 | 1872 | { return This::template rela<32,32>(view, value, overflow); } |
dd93cd0a AM |
1873 | |
1874 | // R_POWERPC_UADDR32: (Symbol + Addend) unaligned | |
f4baf0d4 AM |
1875 | static inline Status |
1876 | addr32_u(unsigned char* view, Address value, Overflow_check overflow) | |
0cfb0717 | 1877 | { return This::template rela_ua<32,32>(view, value, overflow); } |
dd93cd0a AM |
1878 | |
1879 | // R_POWERPC_ADDR24: (Symbol + Addend) & 0x3fffffc | |
f4baf0d4 AM |
1880 | static inline Status |
1881 | addr24(unsigned char* view, Address value, Overflow_check overflow) | |
dd93cd0a | 1882 | { |
0cfb0717 AM |
1883 | Status stat = This::template rela<32,26>(view, 0, 0x03fffffc, |
1884 | value, overflow); | |
f4baf0d4 AM |
1885 | if (overflow != CHECK_NONE && (value & 3) != 0) |
1886 | stat = STATUS_OVERFLOW; | |
dd93cd0a AM |
1887 | return stat; |
1888 | } | |
42cacb20 DE |
1889 | |
1890 | // R_POWERPC_ADDR16: (Symbol + Addend) & 0xffff | |
f4baf0d4 AM |
1891 | static inline Status |
1892 | addr16(unsigned char* view, Address value, Overflow_check overflow) | |
0cfb0717 | 1893 | { return This::template rela<16,16>(view, value, overflow); } |
42cacb20 | 1894 | |
dd93cd0a | 1895 | // R_POWERPC_ADDR16: (Symbol + Addend) & 0xffff, unaligned |
f4baf0d4 AM |
1896 | static inline Status |
1897 | addr16_u(unsigned char* view, Address value, Overflow_check overflow) | |
0cfb0717 | 1898 | { return This::template rela_ua<16,16>(view, value, overflow); } |
42cacb20 | 1899 | |
dd93cd0a | 1900 | // R_POWERPC_ADDR16_DS: (Symbol + Addend) & 0xfffc |
f4baf0d4 AM |
1901 | static inline Status |
1902 | addr16_ds(unsigned char* view, Address value, Overflow_check overflow) | |
dd93cd0a | 1903 | { |
0cfb0717 | 1904 | Status stat = This::template rela<16,16>(view, 0, 0xfffc, value, overflow); |
ec86f434 | 1905 | if ((value & 3) != 0) |
f4baf0d4 | 1906 | stat = STATUS_OVERFLOW; |
dd93cd0a AM |
1907 | return stat; |
1908 | } | |
42cacb20 | 1909 | |
a680de9a PB |
1910 | // R_POWERPC_ADDR16_DQ: (Symbol + Addend) & 0xfff0 |
1911 | static inline Status | |
1912 | addr16_dq(unsigned char* view, Address value, Overflow_check overflow) | |
1913 | { | |
1914 | Status stat = This::template rela<16,16>(view, 0, 0xfff0, value, overflow); | |
1915 | if ((value & 15) != 0) | |
1916 | stat = STATUS_OVERFLOW; | |
1917 | return stat; | |
1918 | } | |
1919 | ||
42cacb20 DE |
1920 | // R_POWERPC_ADDR16_HI: ((Symbol + Addend) >> 16) & 0xffff |
1921 | static inline void | |
dd93cd0a | 1922 | addr16_hi(unsigned char* view, Address value) |
0cfb0717 | 1923 | { This::template rela<16,16>(view, 16, 0xffff, value, CHECK_NONE); } |
42cacb20 | 1924 | |
c9269dff | 1925 | // R_POWERPC_ADDR16_HA: ((Symbol + Addend + 0x8000) >> 16) & 0xffff |
42cacb20 | 1926 | static inline void |
dd93cd0a AM |
1927 | addr16_ha(unsigned char* view, Address value) |
1928 | { This::addr16_hi(view, value + 0x8000); } | |
42cacb20 | 1929 | |
dd93cd0a | 1930 | // R_POWERPC_ADDR16_HIGHER: ((Symbol + Addend) >> 32) & 0xffff |
42cacb20 | 1931 | static inline void |
dd93cd0a | 1932 | addr16_hi2(unsigned char* view, Address value) |
0cfb0717 | 1933 | { This::template rela<16,16>(view, 32, 0xffff, value, CHECK_NONE); } |
42cacb20 | 1934 | |
dd93cd0a | 1935 | // R_POWERPC_ADDR16_HIGHERA: ((Symbol + Addend + 0x8000) >> 32) & 0xffff |
42cacb20 | 1936 | static inline void |
dd93cd0a AM |
1937 | addr16_ha2(unsigned char* view, Address value) |
1938 | { This::addr16_hi2(view, value + 0x8000); } | |
42cacb20 | 1939 | |
dd93cd0a | 1940 | // R_POWERPC_ADDR16_HIGHEST: ((Symbol + Addend) >> 48) & 0xffff |
42cacb20 | 1941 | static inline void |
dd93cd0a | 1942 | addr16_hi3(unsigned char* view, Address value) |
0cfb0717 | 1943 | { This::template rela<16,16>(view, 48, 0xffff, value, CHECK_NONE); } |
42cacb20 | 1944 | |
dd93cd0a | 1945 | // R_POWERPC_ADDR16_HIGHESTA: ((Symbol + Addend + 0x8000) >> 48) & 0xffff |
42cacb20 | 1946 | static inline void |
dd93cd0a AM |
1947 | addr16_ha3(unsigned char* view, Address value) |
1948 | { This::addr16_hi3(view, value + 0x8000); } | |
1949 | ||
1950 | // R_POWERPC_ADDR14: (Symbol + Addend) & 0xfffc | |
f4baf0d4 AM |
1951 | static inline Status |
1952 | addr14(unsigned char* view, Address value, Overflow_check overflow) | |
dd93cd0a | 1953 | { |
0cfb0717 | 1954 | Status stat = This::template rela<32,16>(view, 0, 0xfffc, value, overflow); |
f4baf0d4 AM |
1955 | if (overflow != CHECK_NONE && (value & 3) != 0) |
1956 | stat = STATUS_OVERFLOW; | |
dd93cd0a AM |
1957 | return stat; |
1958 | } | |
a680de9a PB |
1959 | |
1960 | // R_POWERPC_REL16DX_HA | |
1961 | static inline Status | |
1962 | addr16dx_ha(unsigned char *view, Address value, Overflow_check overflow) | |
1963 | { | |
1964 | typedef typename elfcpp::Swap<32, big_endian>::Valtype Valtype; | |
1965 | Valtype* wv = reinterpret_cast<Valtype*>(view); | |
1966 | Valtype val = elfcpp::Swap<32, big_endian>::readval(wv); | |
1967 | value += 0x8000; | |
1968 | value = static_cast<SignedAddress>(value) >> 16; | |
1969 | val |= (value & 0xffc1) | ((value & 0x3e) << 15); | |
1970 | elfcpp::Swap<32, big_endian>::writeval(wv, val); | |
1971 | return overflowed<16>(value, overflow); | |
1972 | } | |
cf43a2fe AM |
1973 | }; |
1974 | ||
b4f7960d AM |
1975 | // Set ABI version for input and output. |
1976 | ||
1977 | template<int size, bool big_endian> | |
1978 | void | |
1979 | Powerpc_relobj<size, big_endian>::set_abiversion(int ver) | |
1980 | { | |
1981 | this->e_flags_ |= ver; | |
1982 | if (this->abiversion() != 0) | |
1983 | { | |
1984 | Target_powerpc<size, big_endian>* target = | |
1985 | static_cast<Target_powerpc<size, big_endian>*>( | |
1986 | parameters->sized_target<size, big_endian>()); | |
1987 | if (target->abiversion() == 0) | |
1988 | target->set_abiversion(this->abiversion()); | |
1989 | else if (target->abiversion() != this->abiversion()) | |
1990 | gold_error(_("%s: ABI version %d is not compatible " | |
1991 | "with ABI version %d output"), | |
1992 | this->name().c_str(), | |
1993 | this->abiversion(), target->abiversion()); | |
1994 | ||
1995 | } | |
1996 | } | |
1997 | ||
5edad15d AM |
1998 | // Stash away the index of .got2, .opd, .rela.toc, and .toc in a |
1999 | // relocatable object, if such sections exists. | |
cf43a2fe AM |
2000 | |
2001 | template<int size, bool big_endian> | |
2002 | bool | |
2003 | Powerpc_relobj<size, big_endian>::do_find_special_sections( | |
2004 | Read_symbols_data* sd) | |
2005 | { | |
c9269dff AM |
2006 | const unsigned char* const pshdrs = sd->section_headers->data(); |
2007 | const unsigned char* namesu = sd->section_names->data(); | |
2008 | const char* names = reinterpret_cast<const char*>(namesu); | |
2009 | section_size_type names_size = sd->section_names_size; | |
2010 | const unsigned char* s; | |
2011 | ||
dc3714f3 AM |
2012 | s = this->template find_shdr<size, big_endian>(pshdrs, |
2013 | size == 32 ? ".got2" : ".opd", | |
2014 | names, names_size, NULL); | |
c9269dff AM |
2015 | if (s != NULL) |
2016 | { | |
2017 | unsigned int ndx = (s - pshdrs) / elfcpp::Elf_sizes<size>::shdr_size; | |
2018 | this->special_ = ndx; | |
b4f7960d AM |
2019 | if (size == 64) |
2020 | { | |
2021 | if (this->abiversion() == 0) | |
2022 | this->set_abiversion(1); | |
2023 | else if (this->abiversion() > 1) | |
2024 | gold_error(_("%s: .opd invalid in abiv%d"), | |
2025 | this->name().c_str(), this->abiversion()); | |
2026 | } | |
c9269dff | 2027 | } |
5edad15d AM |
2028 | if (size == 64) |
2029 | { | |
2030 | s = this->template find_shdr<size, big_endian>(pshdrs, ".rela.toc", | |
2031 | names, names_size, NULL); | |
2032 | if (s != NULL) | |
2033 | { | |
2034 | unsigned int ndx = (s - pshdrs) / elfcpp::Elf_sizes<size>::shdr_size; | |
2035 | this->relatoc_ = ndx; | |
2036 | typename elfcpp::Shdr<size, big_endian> shdr(s); | |
2037 | this->toc_ = this->adjust_shndx(shdr.get_sh_info()); | |
2038 | } | |
2039 | } | |
c9269dff AM |
2040 | return Sized_relobj_file<size, big_endian>::do_find_special_sections(sd); |
2041 | } | |
2042 | ||
2043 | // Examine .rela.opd to build info about function entry points. | |
2044 | ||
2045 | template<int size, bool big_endian> | |
2046 | void | |
2047 | Powerpc_relobj<size, big_endian>::scan_opd_relocs( | |
2048 | size_t reloc_count, | |
2049 | const unsigned char* prelocs, | |
2050 | const unsigned char* plocal_syms) | |
2051 | { | |
2052 | if (size == 64) | |
cf43a2fe | 2053 | { |
0e123f69 AM |
2054 | typedef typename elfcpp::Rela<size, big_endian> Reltype; |
2055 | const int reloc_size = elfcpp::Elf_sizes<size>::rela_size; | |
c9269dff | 2056 | const int sym_size = elfcpp::Elf_sizes<size>::sym_size; |
ec4dbad3 AM |
2057 | Address expected_off = 0; |
2058 | bool regular = true; | |
2059 | unsigned int opd_ent_size = 0; | |
c9269dff AM |
2060 | |
2061 | for (size_t i = 0; i < reloc_count; ++i, prelocs += reloc_size) | |
cf43a2fe | 2062 | { |
c9269dff AM |
2063 | Reltype reloc(prelocs); |
2064 | typename elfcpp::Elf_types<size>::Elf_WXword r_info | |
2065 | = reloc.get_r_info(); | |
2066 | unsigned int r_type = elfcpp::elf_r_type<size>(r_info); | |
2067 | if (r_type == elfcpp::R_PPC64_ADDR64) | |
2068 | { | |
2069 | unsigned int r_sym = elfcpp::elf_r_sym<size>(r_info); | |
2070 | typename elfcpp::Elf_types<size>::Elf_Addr value; | |
2071 | bool is_ordinary; | |
2072 | unsigned int shndx; | |
2073 | if (r_sym < this->local_symbol_count()) | |
2074 | { | |
2075 | typename elfcpp::Sym<size, big_endian> | |
2076 | lsym(plocal_syms + r_sym * sym_size); | |
2077 | shndx = lsym.get_st_shndx(); | |
2078 | shndx = this->adjust_sym_shndx(r_sym, shndx, &is_ordinary); | |
2079 | value = lsym.get_st_value(); | |
2080 | } | |
2081 | else | |
2082 | shndx = this->symbol_section_and_value(r_sym, &value, | |
2083 | &is_ordinary); | |
2084 | this->set_opd_ent(reloc.get_r_offset(), shndx, | |
2085 | value + reloc.get_r_addend()); | |
ec4dbad3 AM |
2086 | if (i == 2) |
2087 | { | |
2088 | expected_off = reloc.get_r_offset(); | |
2089 | opd_ent_size = expected_off; | |
2090 | } | |
2091 | else if (expected_off != reloc.get_r_offset()) | |
2092 | regular = false; | |
2093 | expected_off += opd_ent_size; | |
2094 | } | |
2095 | else if (r_type == elfcpp::R_PPC64_TOC) | |
2096 | { | |
2097 | if (expected_off - opd_ent_size + 8 != reloc.get_r_offset()) | |
2098 | regular = false; | |
2099 | } | |
2100 | else | |
2101 | { | |
2102 | gold_warning(_("%s: unexpected reloc type %u in .opd section"), | |
2103 | this->name().c_str(), r_type); | |
2104 | regular = false; | |
c9269dff AM |
2105 | } |
2106 | } | |
ec4dbad3 AM |
2107 | if (reloc_count <= 2) |
2108 | opd_ent_size = this->section_size(this->opd_shndx()); | |
2109 | if (opd_ent_size != 24 && opd_ent_size != 16) | |
2110 | regular = false; | |
2111 | if (!regular) | |
2112 | { | |
2113 | gold_warning(_("%s: .opd is not a regular array of opd entries"), | |
2114 | this->name().c_str()); | |
2115 | opd_ent_size = 0; | |
2116 | } | |
c9269dff AM |
2117 | } |
2118 | } | |
2119 | ||
5edad15d AM |
2120 | // Returns true if a code sequence loading the TOC entry at VALUE |
2121 | // relative to the TOC pointer can be converted into code calculating | |
2122 | // a TOC pointer relative offset. | |
2123 | // If so, the TOC pointer relative offset is stored to VALUE. | |
2124 | ||
2125 | template<int size, bool big_endian> | |
2126 | bool | |
2127 | Powerpc_relobj<size, big_endian>::make_toc_relative( | |
2128 | Target_powerpc<size, big_endian>* target, | |
2129 | Address* value) | |
2130 | { | |
2131 | if (size != 64) | |
2132 | return false; | |
2133 | ||
e666304e AM |
2134 | // With -mcmodel=medium code it is quite possible to have |
2135 | // toc-relative relocs referring to objects outside the TOC. | |
2136 | // Don't try to look at a non-existent TOC. | |
2137 | if (this->toc_shndx() == 0) | |
2138 | return false; | |
2139 | ||
5edad15d AM |
2140 | // Convert VALUE back to an address by adding got_base (see below), |
2141 | // then to an offset in the TOC by subtracting the TOC output | |
2142 | // section address and the TOC output offset. Since this TOC output | |
2143 | // section and the got output section are one and the same, we can | |
2144 | // omit adding and subtracting the output section address. | |
2145 | Address off = (*value + this->toc_base_offset() | |
2146 | - this->output_section_offset(this->toc_shndx())); | |
2147 | // Is this offset in the TOC? -mcmodel=medium code may be using | |
2148 | // TOC relative access to variables outside the TOC. Those of | |
2149 | // course can't be optimized. We also don't try to optimize code | |
2150 | // that is using a different object's TOC. | |
2151 | if (off >= this->section_size(this->toc_shndx())) | |
2152 | return false; | |
2153 | ||
2154 | if (this->no_toc_opt(off)) | |
2155 | return false; | |
2156 | ||
2157 | section_size_type vlen; | |
2158 | unsigned char* view = this->get_output_view(this->toc_shndx(), &vlen); | |
2159 | Address addr = elfcpp::Swap<size, big_endian>::readval(view + off); | |
2160 | // The TOC pointer | |
2161 | Address got_base = (target->got_section()->output_section()->address() | |
2162 | + this->toc_base_offset()); | |
2163 | addr -= got_base; | |
857e829e | 2164 | if (addr + (uint64_t) 0x80008000 >= (uint64_t) 1 << 32) |
5edad15d AM |
2165 | return false; |
2166 | ||
2167 | *value = addr; | |
2168 | return true; | |
2169 | } | |
2170 | ||
2171 | // Perform the Sized_relobj_file method, then set up opd info from | |
2172 | // .opd relocs. | |
2173 | ||
c9269dff AM |
2174 | template<int size, bool big_endian> |
2175 | void | |
2176 | Powerpc_relobj<size, big_endian>::do_read_relocs(Read_relocs_data* rd) | |
2177 | { | |
2178 | Sized_relobj_file<size, big_endian>::do_read_relocs(rd); | |
2179 | if (size == 64) | |
2180 | { | |
2181 | for (Read_relocs_data::Relocs_list::iterator p = rd->relocs.begin(); | |
2182 | p != rd->relocs.end(); | |
2183 | ++p) | |
2184 | { | |
2185 | if (p->data_shndx == this->opd_shndx()) | |
2186 | { | |
ec4dbad3 AM |
2187 | uint64_t opd_size = this->section_size(this->opd_shndx()); |
2188 | gold_assert(opd_size == static_cast<size_t>(opd_size)); | |
2189 | if (opd_size != 0) | |
2190 | { | |
2191 | this->init_opd(opd_size); | |
2192 | this->scan_opd_relocs(p->reloc_count, p->contents->data(), | |
2193 | rd->local_symbols->data()); | |
2194 | } | |
c9269dff AM |
2195 | break; |
2196 | } | |
cf43a2fe AM |
2197 | } |
2198 | } | |
cf43a2fe AM |
2199 | } |
2200 | ||
b4f7960d AM |
2201 | // Read the symbols then set up st_other vector. |
2202 | ||
2203 | template<int size, bool big_endian> | |
2204 | void | |
2205 | Powerpc_relobj<size, big_endian>::do_read_symbols(Read_symbols_data* sd) | |
2206 | { | |
f35c4853 | 2207 | this->base_read_symbols(sd); |
b4f7960d AM |
2208 | if (size == 64) |
2209 | { | |
2210 | const int shdr_size = elfcpp::Elf_sizes<size>::shdr_size; | |
2211 | const unsigned char* const pshdrs = sd->section_headers->data(); | |
2212 | const unsigned int loccount = this->do_local_symbol_count(); | |
2213 | if (loccount != 0) | |
2214 | { | |
2215 | this->st_other_.resize(loccount); | |
2216 | const int sym_size = elfcpp::Elf_sizes<size>::sym_size; | |
2217 | off_t locsize = loccount * sym_size; | |
2218 | const unsigned int symtab_shndx = this->symtab_shndx(); | |
2219 | const unsigned char *psymtab = pshdrs + symtab_shndx * shdr_size; | |
2220 | typename elfcpp::Shdr<size, big_endian> shdr(psymtab); | |
2221 | const unsigned char* psyms = this->get_view(shdr.get_sh_offset(), | |
2222 | locsize, true, false); | |
2223 | psyms += sym_size; | |
2224 | for (unsigned int i = 1; i < loccount; ++i, psyms += sym_size) | |
2225 | { | |
2226 | elfcpp::Sym<size, big_endian> sym(psyms); | |
2227 | unsigned char st_other = sym.get_st_other(); | |
2228 | this->st_other_[i] = st_other; | |
2229 | if ((st_other & elfcpp::STO_PPC64_LOCAL_MASK) != 0) | |
2230 | { | |
2231 | if (this->abiversion() == 0) | |
2232 | this->set_abiversion(2); | |
2233 | else if (this->abiversion() < 2) | |
2234 | gold_error(_("%s: local symbol %d has invalid st_other" | |
2235 | " for ABI version 1"), | |
2236 | this->name().c_str(), i); | |
2237 | } | |
2238 | } | |
2239 | } | |
2240 | } | |
2241 | } | |
2242 | ||
2243 | template<int size, bool big_endian> | |
2244 | void | |
2245 | Powerpc_dynobj<size, big_endian>::set_abiversion(int ver) | |
2246 | { | |
2247 | this->e_flags_ |= ver; | |
2248 | if (this->abiversion() != 0) | |
2249 | { | |
2250 | Target_powerpc<size, big_endian>* target = | |
2251 | static_cast<Target_powerpc<size, big_endian>*>( | |
2252 | parameters->sized_target<size, big_endian>()); | |
2253 | if (target->abiversion() == 0) | |
2254 | target->set_abiversion(this->abiversion()); | |
2255 | else if (target->abiversion() != this->abiversion()) | |
2256 | gold_error(_("%s: ABI version %d is not compatible " | |
2257 | "with ABI version %d output"), | |
2258 | this->name().c_str(), | |
2259 | this->abiversion(), target->abiversion()); | |
2260 | ||
2261 | } | |
2262 | } | |
2263 | ||
f35c4853 | 2264 | // Call Sized_dynobj::base_read_symbols to read the symbols then |
dc3714f3 AM |
2265 | // read .opd from a dynamic object, filling in opd_ent_ vector, |
2266 | ||
2267 | template<int size, bool big_endian> | |
2268 | void | |
2269 | Powerpc_dynobj<size, big_endian>::do_read_symbols(Read_symbols_data* sd) | |
2270 | { | |
f35c4853 | 2271 | this->base_read_symbols(sd); |
dc3714f3 AM |
2272 | if (size == 64) |
2273 | { | |
2274 | const int shdr_size = elfcpp::Elf_sizes<size>::shdr_size; | |
2275 | const unsigned char* const pshdrs = sd->section_headers->data(); | |
2276 | const unsigned char* namesu = sd->section_names->data(); | |
2277 | const char* names = reinterpret_cast<const char*>(namesu); | |
2278 | const unsigned char* s = NULL; | |
2279 | const unsigned char* opd; | |
2280 | section_size_type opd_size; | |
2281 | ||
2282 | // Find and read .opd section. | |
2283 | while (1) | |
2284 | { | |
2285 | s = this->template find_shdr<size, big_endian>(pshdrs, ".opd", names, | |
2286 | sd->section_names_size, | |
2287 | s); | |
2288 | if (s == NULL) | |
2289 | return; | |
2290 | ||
2291 | typename elfcpp::Shdr<size, big_endian> shdr(s); | |
2292 | if (shdr.get_sh_type() == elfcpp::SHT_PROGBITS | |
2293 | && (shdr.get_sh_flags() & elfcpp::SHF_ALLOC) != 0) | |
2294 | { | |
b4f7960d AM |
2295 | if (this->abiversion() == 0) |
2296 | this->set_abiversion(1); | |
2297 | else if (this->abiversion() > 1) | |
2298 | gold_error(_("%s: .opd invalid in abiv%d"), | |
2299 | this->name().c_str(), this->abiversion()); | |
2300 | ||
dc3714f3 AM |
2301 | this->opd_shndx_ = (s - pshdrs) / shdr_size; |
2302 | this->opd_address_ = shdr.get_sh_addr(); | |
2303 | opd_size = convert_to_section_size_type(shdr.get_sh_size()); | |
2304 | opd = this->get_view(shdr.get_sh_offset(), opd_size, | |
2305 | true, false); | |
2306 | break; | |
2307 | } | |
2308 | } | |
2309 | ||
2310 | // Build set of executable sections. | |
2311 | // Using a set is probably overkill. There is likely to be only | |
2312 | // a few executable sections, typically .init, .text and .fini, | |
2313 | // and they are generally grouped together. | |
2314 | typedef std::set<Sec_info> Exec_sections; | |
2315 | Exec_sections exec_sections; | |
2316 | s = pshdrs; | |
2317 | for (unsigned int i = 1; i < this->shnum(); ++i, s += shdr_size) | |
2318 | { | |
2319 | typename elfcpp::Shdr<size, big_endian> shdr(s); | |
2320 | if (shdr.get_sh_type() == elfcpp::SHT_PROGBITS | |
2321 | && ((shdr.get_sh_flags() | |
2322 | & (elfcpp::SHF_ALLOC | elfcpp::SHF_EXECINSTR)) | |
2323 | == (elfcpp::SHF_ALLOC | elfcpp::SHF_EXECINSTR)) | |
2324 | && shdr.get_sh_size() != 0) | |
2325 | { | |
2326 | exec_sections.insert(Sec_info(shdr.get_sh_addr(), | |
2327 | shdr.get_sh_size(), i)); | |
2328 | } | |
2329 | } | |
2330 | if (exec_sections.empty()) | |
2331 | return; | |
2332 | ||
2333 | // Look over the OPD entries. This is complicated by the fact | |
2334 | // that some binaries will use two-word entries while others | |
2335 | // will use the standard three-word entries. In most cases | |
2336 | // the third word (the environment pointer for languages like | |
2337 | // Pascal) is unused and will be zero. If the third word is | |
2338 | // used it should not be pointing into executable sections, | |
2339 | // I think. | |
2340 | this->init_opd(opd_size); | |
2341 | for (const unsigned char* p = opd; p < opd + opd_size; p += 8) | |
2342 | { | |
2343 | typedef typename elfcpp::Swap<64, big_endian>::Valtype Valtype; | |
2344 | const Valtype* valp = reinterpret_cast<const Valtype*>(p); | |
2345 | Valtype val = elfcpp::Swap<64, big_endian>::readval(valp); | |
2346 | if (val == 0) | |
2347 | // Chances are that this is the third word of an OPD entry. | |
2348 | continue; | |
2349 | typename Exec_sections::const_iterator e | |
2350 | = exec_sections.upper_bound(Sec_info(val, 0, 0)); | |
2351 | if (e != exec_sections.begin()) | |
2352 | { | |
2353 | --e; | |
2354 | if (e->start <= val && val < e->start + e->len) | |
2355 | { | |
2356 | // We have an address in an executable section. | |
2357 | // VAL ought to be the function entry, set it up. | |
2358 | this->set_opd_ent(p - opd, e->shndx, val); | |
2359 | // Skip second word of OPD entry, the TOC pointer. | |
2360 | p += 8; | |
2361 | } | |
2362 | } | |
2363 | // If we didn't match any executable sections, we likely | |
2364 | // have a non-zero third word in the OPD entry. | |
2365 | } | |
2366 | } | |
2367 | } | |
2368 | ||
5edad15d AM |
2369 | // Relocate sections. |
2370 | ||
2371 | template<int size, bool big_endian> | |
2372 | void | |
2373 | Powerpc_relobj<size, big_endian>::do_relocate_sections( | |
2374 | const Symbol_table* symtab, const Layout* layout, | |
2375 | const unsigned char* pshdrs, Output_file* of, | |
2376 | typename Sized_relobj_file<size, big_endian>::Views* pviews) | |
2377 | { | |
2378 | unsigned int start = 1; | |
2379 | if (size == 64 | |
2380 | && this->relatoc_ != 0 | |
2381 | && !parameters->options().relocatable()) | |
2382 | { | |
2383 | // Relocate .toc first. | |
2384 | this->relocate_section_range(symtab, layout, pshdrs, of, pviews, | |
2385 | this->relatoc_, this->relatoc_); | |
2386 | this->relocate_section_range(symtab, layout, pshdrs, of, pviews, | |
2387 | 1, this->relatoc_ - 1); | |
2388 | start = this->relatoc_ + 1; | |
2389 | } | |
2390 | this->relocate_section_range(symtab, layout, pshdrs, of, pviews, | |
2391 | start, this->shnum() - 1); | |
2392 | } | |
2393 | ||
f43ba157 | 2394 | // Set up some symbols. |
26a4e9cb AM |
2395 | |
2396 | template<int size, bool big_endian> | |
2397 | void | |
f43ba157 AM |
2398 | Target_powerpc<size, big_endian>::do_define_standard_symbols( |
2399 | Symbol_table* symtab, | |
2400 | Layout* layout) | |
26a4e9cb AM |
2401 | { |
2402 | if (size == 32) | |
2403 | { | |
bb66a627 AM |
2404 | // Define _GLOBAL_OFFSET_TABLE_ to ensure it isn't seen as |
2405 | // undefined when scanning relocs (and thus requires | |
26a4e9cb AM |
2406 | // non-relative dynamic relocs). The proper value will be |
2407 | // updated later. | |
2408 | Symbol *gotsym = symtab->lookup("_GLOBAL_OFFSET_TABLE_", NULL); | |
2409 | if (gotsym != NULL && gotsym->is_undefined()) | |
2410 | { | |
2411 | Target_powerpc<size, big_endian>* target = | |
2412 | static_cast<Target_powerpc<size, big_endian>*>( | |
2413 | parameters->sized_target<size, big_endian>()); | |
2414 | Output_data_got_powerpc<size, big_endian>* got | |
2415 | = target->got_section(symtab, layout); | |
2416 | symtab->define_in_output_data("_GLOBAL_OFFSET_TABLE_", NULL, | |
2417 | Symbol_table::PREDEFINED, | |
2418 | got, 0, 0, | |
2419 | elfcpp::STT_OBJECT, | |
bb66a627 | 2420 | elfcpp::STB_LOCAL, |
26a4e9cb AM |
2421 | elfcpp::STV_HIDDEN, 0, |
2422 | false, false); | |
2423 | } | |
2424 | ||
2425 | // Define _SDA_BASE_ at the start of the .sdata section + 32768. | |
2426 | Symbol *sdasym = symtab->lookup("_SDA_BASE_", NULL); | |
2427 | if (sdasym != NULL && sdasym->is_undefined()) | |
2428 | { | |
2429 | Output_data_space* sdata = new Output_data_space(4, "** sdata"); | |
2430 | Output_section* os | |
2431 | = layout->add_output_section_data(".sdata", 0, | |
2432 | elfcpp::SHF_ALLOC | |
2433 | | elfcpp::SHF_WRITE, | |
2434 | sdata, ORDER_SMALL_DATA, false); | |
2435 | symtab->define_in_output_data("_SDA_BASE_", NULL, | |
2436 | Symbol_table::PREDEFINED, | |
2437 | os, 32768, 0, elfcpp::STT_OBJECT, | |
2438 | elfcpp::STB_LOCAL, elfcpp::STV_HIDDEN, | |
2439 | 0, false, false); | |
2440 | } | |
2441 | } | |
b4f7960d AM |
2442 | else |
2443 | { | |
2444 | // Define .TOC. as for 32-bit _GLOBAL_OFFSET_TABLE_ | |
2445 | Symbol *gotsym = symtab->lookup(".TOC.", NULL); | |
2446 | if (gotsym != NULL && gotsym->is_undefined()) | |
2447 | { | |
2448 | Target_powerpc<size, big_endian>* target = | |
2449 | static_cast<Target_powerpc<size, big_endian>*>( | |
2450 | parameters->sized_target<size, big_endian>()); | |
2451 | Output_data_got_powerpc<size, big_endian>* got | |
2452 | = target->got_section(symtab, layout); | |
2453 | symtab->define_in_output_data(".TOC.", NULL, | |
2454 | Symbol_table::PREDEFINED, | |
2455 | got, 0x8000, 0, | |
2456 | elfcpp::STT_OBJECT, | |
2457 | elfcpp::STB_LOCAL, | |
2458 | elfcpp::STV_HIDDEN, 0, | |
2459 | false, false); | |
2460 | } | |
2461 | } | |
26a4e9cb AM |
2462 | } |
2463 | ||
cf43a2fe AM |
2464 | // Set up PowerPC target specific relobj. |
2465 | ||
2466 | template<int size, bool big_endian> | |
2467 | Object* | |
2468 | Target_powerpc<size, big_endian>::do_make_elf_object( | |
2469 | const std::string& name, | |
2470 | Input_file* input_file, | |
2471 | off_t offset, const elfcpp::Ehdr<size, big_endian>& ehdr) | |
2472 | { | |
2473 | int et = ehdr.get_e_type(); | |
957564c9 AS |
2474 | // ET_EXEC files are valid input for --just-symbols/-R, |
2475 | // and we treat them as relocatable objects. | |
2476 | if (et == elfcpp::ET_REL | |
2477 | || (et == elfcpp::ET_EXEC && input_file->just_symbols())) | |
cf43a2fe AM |
2478 | { |
2479 | Powerpc_relobj<size, big_endian>* obj = | |
c9269dff | 2480 | new Powerpc_relobj<size, big_endian>(name, input_file, offset, ehdr); |
cf43a2fe AM |
2481 | obj->setup(); |
2482 | return obj; | |
2483 | } | |
2484 | else if (et == elfcpp::ET_DYN) | |
2485 | { | |
dc3714f3 AM |
2486 | Powerpc_dynobj<size, big_endian>* obj = |
2487 | new Powerpc_dynobj<size, big_endian>(name, input_file, offset, ehdr); | |
cf43a2fe AM |
2488 | obj->setup(); |
2489 | return obj; | |
2490 | } | |
2491 | else | |
2492 | { | |
c9269dff | 2493 | gold_error(_("%s: unsupported ELF file type %d"), name.c_str(), et); |
cf43a2fe AM |
2494 | return NULL; |
2495 | } | |
2496 | } | |
2497 | ||
2498 | template<int size, bool big_endian> | |
2499 | class Output_data_got_powerpc : public Output_data_got<size, big_endian> | |
2500 | { | |
2501 | public: | |
2502 | typedef typename elfcpp::Elf_types<size>::Elf_Addr Valtype; | |
2503 | typedef Output_data_reloc<elfcpp::SHT_RELA, true, size, big_endian> Rela_dyn; | |
2504 | ||
2505 | Output_data_got_powerpc(Symbol_table* symtab, Layout* layout) | |
2506 | : Output_data_got<size, big_endian>(), | |
2507 | symtab_(symtab), layout_(layout), | |
2508 | header_ent_cnt_(size == 32 ? 3 : 1), | |
2509 | header_index_(size == 32 ? 0x2000 : 0) | |
751e4d66 AM |
2510 | { |
2511 | if (size == 64) | |
2512 | this->set_addralign(256); | |
2513 | } | |
cf43a2fe | 2514 | |
e84fe78f AM |
2515 | // Override all the Output_data_got methods we use so as to first call |
2516 | // reserve_ent(). | |
2517 | bool | |
2518 | add_global(Symbol* gsym, unsigned int got_type) | |
2519 | { | |
2520 | this->reserve_ent(); | |
2521 | return Output_data_got<size, big_endian>::add_global(gsym, got_type); | |
2522 | } | |
2523 | ||
2524 | bool | |
2525 | add_global_plt(Symbol* gsym, unsigned int got_type) | |
2526 | { | |
2527 | this->reserve_ent(); | |
2528 | return Output_data_got<size, big_endian>::add_global_plt(gsym, got_type); | |
2529 | } | |
2530 | ||
2531 | bool | |
2532 | add_global_tls(Symbol* gsym, unsigned int got_type) | |
2533 | { return this->add_global_plt(gsym, got_type); } | |
2534 | ||
2535 | void | |
2536 | add_global_with_rel(Symbol* gsym, unsigned int got_type, | |
2537 | Output_data_reloc_generic* rel_dyn, unsigned int r_type) | |
2538 | { | |
2539 | this->reserve_ent(); | |
2540 | Output_data_got<size, big_endian>:: | |
2541 | add_global_with_rel(gsym, got_type, rel_dyn, r_type); | |
2542 | } | |
2543 | ||
2544 | void | |
2545 | add_global_pair_with_rel(Symbol* gsym, unsigned int got_type, | |
2546 | Output_data_reloc_generic* rel_dyn, | |
2547 | unsigned int r_type_1, unsigned int r_type_2) | |
2548 | { | |
aacb3b6d AM |
2549 | if (gsym->has_got_offset(got_type)) |
2550 | return; | |
2551 | ||
e84fe78f AM |
2552 | this->reserve_ent(2); |
2553 | Output_data_got<size, big_endian>:: | |
2554 | add_global_pair_with_rel(gsym, got_type, rel_dyn, r_type_1, r_type_2); | |
2555 | } | |
2556 | ||
2557 | bool | |
2558 | add_local(Relobj* object, unsigned int sym_index, unsigned int got_type) | |
2559 | { | |
2560 | this->reserve_ent(); | |
2561 | return Output_data_got<size, big_endian>::add_local(object, sym_index, | |
2562 | got_type); | |
2563 | } | |
2564 | ||
2565 | bool | |
2566 | add_local_plt(Relobj* object, unsigned int sym_index, unsigned int got_type) | |
2567 | { | |
2568 | this->reserve_ent(); | |
2569 | return Output_data_got<size, big_endian>::add_local_plt(object, sym_index, | |
2570 | got_type); | |
2571 | } | |
2572 | ||
2573 | bool | |
2574 | add_local_tls(Relobj* object, unsigned int sym_index, unsigned int got_type) | |
2575 | { return this->add_local_plt(object, sym_index, got_type); } | |
2576 | ||
2577 | void | |
2578 | add_local_tls_pair(Relobj* object, unsigned int sym_index, | |
2579 | unsigned int got_type, | |
2580 | Output_data_reloc_generic* rel_dyn, | |
2581 | unsigned int r_type) | |
2582 | { | |
aacb3b6d AM |
2583 | if (object->local_has_got_offset(sym_index, got_type)) |
2584 | return; | |
2585 | ||
e84fe78f AM |
2586 | this->reserve_ent(2); |
2587 | Output_data_got<size, big_endian>:: | |
2588 | add_local_tls_pair(object, sym_index, got_type, rel_dyn, r_type); | |
2589 | } | |
2590 | ||
2591 | unsigned int | |
2592 | add_constant(Valtype constant) | |
2593 | { | |
2594 | this->reserve_ent(); | |
2595 | return Output_data_got<size, big_endian>::add_constant(constant); | |
2596 | } | |
2597 | ||
dd93cd0a AM |
2598 | unsigned int |
2599 | add_constant_pair(Valtype c1, Valtype c2) | |
2600 | { | |
2601 | this->reserve_ent(2); | |
e84fe78f | 2602 | return Output_data_got<size, big_endian>::add_constant_pair(c1, c2); |
dd93cd0a AM |
2603 | } |
2604 | ||
2605 | // Offset of _GLOBAL_OFFSET_TABLE_. | |
cf43a2fe AM |
2606 | unsigned int |
2607 | g_o_t() const | |
2608 | { | |
2609 | return this->got_offset(this->header_index_); | |
42cacb20 | 2610 | } |
cf43a2fe | 2611 | |
dd93cd0a AM |
2612 | // Offset of base used to access the GOT/TOC. |
2613 | // The got/toc pointer reg will be set to this value. | |
26a4e9cb | 2614 | Valtype |
dd93cd0a AM |
2615 | got_base_offset(const Powerpc_relobj<size, big_endian>* object) const |
2616 | { | |
2617 | if (size == 32) | |
2618 | return this->g_o_t(); | |
2619 | else | |
2620 | return (this->output_section()->address() | |
2621 | + object->toc_base_offset() | |
2622 | - this->address()); | |
2623 | } | |
2624 | ||
cf43a2fe AM |
2625 | // Ensure our GOT has a header. |
2626 | void | |
2627 | set_final_data_size() | |
2628 | { | |
2629 | if (this->header_ent_cnt_ != 0) | |
2630 | this->make_header(); | |
2631 | Output_data_got<size, big_endian>::set_final_data_size(); | |
2632 | } | |
2633 | ||
2634 | // First word of GOT header needs some values that are not | |
2635 | // handled by Output_data_got so poke them in here. | |
2636 | // For 32-bit, address of .dynamic, for 64-bit, address of TOCbase. | |
2637 | void | |
2638 | do_write(Output_file* of) | |
2639 | { | |
c9824451 AM |
2640 | Valtype val = 0; |
2641 | if (size == 32 && this->layout_->dynamic_data() != NULL) | |
2642 | val = this->layout_->dynamic_section()->address(); | |
2643 | if (size == 64) | |
2644 | val = this->output_section()->address() + 0x8000; | |
2645 | this->replace_constant(this->header_index_, val); | |
cf43a2fe AM |
2646 | Output_data_got<size, big_endian>::do_write(of); |
2647 | } | |
2648 | ||
2649 | private: | |
2650 | void | |
2651 | reserve_ent(unsigned int cnt = 1) | |
2652 | { | |
2653 | if (this->header_ent_cnt_ == 0) | |
2654 | return; | |
2655 | if (this->num_entries() + cnt > this->header_index_) | |
2656 | this->make_header(); | |
2657 | } | |
2658 | ||
2659 | void | |
2660 | make_header() | |
2661 | { | |
2662 | this->header_ent_cnt_ = 0; | |
2663 | this->header_index_ = this->num_entries(); | |
2664 | if (size == 32) | |
2665 | { | |
2666 | Output_data_got<size, big_endian>::add_constant(0); | |
2667 | Output_data_got<size, big_endian>::add_constant(0); | |
2668 | Output_data_got<size, big_endian>::add_constant(0); | |
2669 | ||
2670 | // Define _GLOBAL_OFFSET_TABLE_ at the header | |
bb66a627 AM |
2671 | Symbol *gotsym = this->symtab_->lookup("_GLOBAL_OFFSET_TABLE_", NULL); |
2672 | if (gotsym != NULL) | |
2673 | { | |
2674 | Sized_symbol<size>* sym = static_cast<Sized_symbol<size>*>(gotsym); | |
2675 | sym->set_value(this->g_o_t()); | |
2676 | } | |
2677 | else | |
2678 | this->symtab_->define_in_output_data("_GLOBAL_OFFSET_TABLE_", NULL, | |
2679 | Symbol_table::PREDEFINED, | |
2680 | this, this->g_o_t(), 0, | |
2681 | elfcpp::STT_OBJECT, | |
2682 | elfcpp::STB_LOCAL, | |
2683 | elfcpp::STV_HIDDEN, 0, | |
2684 | false, false); | |
cf43a2fe AM |
2685 | } |
2686 | else | |
2687 | Output_data_got<size, big_endian>::add_constant(0); | |
2688 | } | |
2689 | ||
2690 | // Stashed pointers. | |
2691 | Symbol_table* symtab_; | |
2692 | Layout* layout_; | |
2693 | ||
2694 | // GOT header size. | |
2695 | unsigned int header_ent_cnt_; | |
2696 | // GOT header index. | |
2697 | unsigned int header_index_; | |
42cacb20 DE |
2698 | }; |
2699 | ||
2700 | // Get the GOT section, creating it if necessary. | |
2701 | ||
2702 | template<int size, bool big_endian> | |
cf43a2fe | 2703 | Output_data_got_powerpc<size, big_endian>* |
42cacb20 DE |
2704 | Target_powerpc<size, big_endian>::got_section(Symbol_table* symtab, |
2705 | Layout* layout) | |
2706 | { | |
2707 | if (this->got_ == NULL) | |
2708 | { | |
2709 | gold_assert(symtab != NULL && layout != NULL); | |
2710 | ||
cf43a2fe AM |
2711 | this->got_ |
2712 | = new Output_data_got_powerpc<size, big_endian>(symtab, layout); | |
42cacb20 DE |
2713 | |
2714 | layout->add_output_section_data(".got", elfcpp::SHT_PROGBITS, | |
2715 | elfcpp::SHF_ALLOC | elfcpp::SHF_WRITE, | |
22f0da72 | 2716 | this->got_, ORDER_DATA, false); |
42cacb20 DE |
2717 | } |
2718 | ||
2719 | return this->got_; | |
2720 | } | |
2721 | ||
2722 | // Get the dynamic reloc section, creating it if necessary. | |
2723 | ||
2724 | template<int size, bool big_endian> | |
2725 | typename Target_powerpc<size, big_endian>::Reloc_section* | |
2726 | Target_powerpc<size, big_endian>::rela_dyn_section(Layout* layout) | |
2727 | { | |
2728 | if (this->rela_dyn_ == NULL) | |
2729 | { | |
2730 | gold_assert(layout != NULL); | |
2731 | this->rela_dyn_ = new Reloc_section(parameters->options().combreloc()); | |
2732 | layout->add_output_section_data(".rela.dyn", elfcpp::SHT_RELA, | |
22f0da72 ILT |
2733 | elfcpp::SHF_ALLOC, this->rela_dyn_, |
2734 | ORDER_DYNAMIC_RELOCS, false); | |
42cacb20 DE |
2735 | } |
2736 | return this->rela_dyn_; | |
2737 | } | |
2738 | ||
b3ccdeb5 AM |
2739 | // Similarly, but for ifunc symbols get the one for ifunc. |
2740 | ||
2741 | template<int size, bool big_endian> | |
2742 | typename Target_powerpc<size, big_endian>::Reloc_section* | |
2743 | Target_powerpc<size, big_endian>::rela_dyn_section(Symbol_table* symtab, | |
2744 | Layout* layout, | |
2745 | bool for_ifunc) | |
2746 | { | |
2747 | if (!for_ifunc) | |
2748 | return this->rela_dyn_section(layout); | |
2749 | ||
2750 | if (this->iplt_ == NULL) | |
2751 | this->make_iplt_section(symtab, layout); | |
2752 | return this->iplt_->rel_plt(); | |
2753 | } | |
2754 | ||
ec661b9d AM |
2755 | class Stub_control |
2756 | { | |
2757 | public: | |
2758 | // Determine the stub group size. The group size is the absolute | |
2759 | // value of the parameter --stub-group-size. If --stub-group-size | |
a5018ae5 | 2760 | // is passed a negative value, we restrict stubs to be always after |
ec661b9d | 2761 | // the stubbed branches. |
1c3a5fbe AM |
2762 | Stub_control(int32_t size, bool no_size_errors, bool multi_os) |
2763 | : stub_group_size_(abs(size)), stubs_always_after_branch_(size < 0), | |
2764 | suppress_size_errors_(no_size_errors), multi_os_(multi_os), | |
2765 | state_(NO_GROUP), group_size_(0), group_start_addr_(0), | |
2766 | owner_(NULL), output_section_(NULL) | |
ec661b9d | 2767 | { |
ec661b9d AM |
2768 | } |
2769 | ||
2770 | // Return true iff input section can be handled by current stub | |
2771 | // group. | |
2772 | bool | |
2773 | can_add_to_stub_group(Output_section* o, | |
2774 | const Output_section::Input_section* i, | |
2775 | bool has14); | |
2776 | ||
2777 | const Output_section::Input_section* | |
2778 | owner() | |
2779 | { return owner_; } | |
2780 | ||
2781 | Output_section* | |
2782 | output_section() | |
2783 | { return output_section_; } | |
2784 | ||
a20605cf AM |
2785 | void |
2786 | set_output_and_owner(Output_section* o, | |
2787 | const Output_section::Input_section* i) | |
2788 | { | |
2789 | this->output_section_ = o; | |
2790 | this->owner_ = i; | |
2791 | } | |
2792 | ||
ec661b9d AM |
2793 | private: |
2794 | typedef enum | |
2795 | { | |
1c3a5fbe | 2796 | // Initial state. |
ec661b9d | 2797 | NO_GROUP, |
1c3a5fbe | 2798 | // Adding group sections before the stubs. |
ec661b9d | 2799 | FINDING_STUB_SECTION, |
1c3a5fbe | 2800 | // Adding group sections after the stubs. |
ec661b9d AM |
2801 | HAS_STUB_SECTION |
2802 | } State; | |
2803 | ||
ec661b9d | 2804 | uint32_t stub_group_size_; |
a5018ae5 | 2805 | bool stubs_always_after_branch_; |
ec661b9d | 2806 | bool suppress_size_errors_; |
1c3a5fbe AM |
2807 | // True if a stub group can serve multiple output sections. |
2808 | bool multi_os_; | |
2809 | State state_; | |
8a37735f AM |
2810 | // Current max size of group. Starts at stub_group_size_ but is |
2811 | // reduced to stub_group_size_/1024 on seeing a section with | |
2812 | // external conditional branches. | |
2813 | uint32_t group_size_; | |
a5018ae5 | 2814 | uint64_t group_start_addr_; |
57f6d32d AM |
2815 | // owner_ and output_section_ specify the section to which stubs are |
2816 | // attached. The stubs are placed at the end of this section. | |
ec661b9d AM |
2817 | const Output_section::Input_section* owner_; |
2818 | Output_section* output_section_; | |
2819 | }; | |
2820 | ||
0cfdc767 | 2821 | // Return true iff input section can be handled by current stub |
a5018ae5 AM |
2822 | // group. Sections are presented to this function in order, |
2823 | // so the first section is the head of the group. | |
ec661b9d AM |
2824 | |
2825 | bool | |
2826 | Stub_control::can_add_to_stub_group(Output_section* o, | |
2827 | const Output_section::Input_section* i, | |
2828 | bool has14) | |
2829 | { | |
ec661b9d AM |
2830 | bool whole_sec = o->order() == ORDER_INIT || o->order() == ORDER_FINI; |
2831 | uint64_t this_size; | |
2832 | uint64_t start_addr = o->address(); | |
2833 | ||
2834 | if (whole_sec) | |
2835 | // .init and .fini sections are pasted together to form a single | |
2836 | // function. We can't be adding stubs in the middle of the function. | |
2837 | this_size = o->data_size(); | |
2838 | else | |
2839 | { | |
2840 | start_addr += i->relobj()->output_section_offset(i->shndx()); | |
2841 | this_size = i->data_size(); | |
2842 | } | |
57f6d32d | 2843 | |
a5018ae5 | 2844 | uint64_t end_addr = start_addr + this_size; |
8a37735f AM |
2845 | uint32_t group_size = this->stub_group_size_; |
2846 | if (has14) | |
2847 | this->group_size_ = group_size = group_size >> 10; | |
ec661b9d | 2848 | |
57f6d32d | 2849 | if (this_size > group_size && !this->suppress_size_errors_) |
ec661b9d AM |
2850 | gold_warning(_("%s:%s exceeds group size"), |
2851 | i->relobj()->name().c_str(), | |
2852 | i->relobj()->section_name(i->shndx()).c_str()); | |
2853 | ||
afe002dd AM |
2854 | gold_debug(DEBUG_TARGET, "maybe add%s %s:%s size=%#llx total=%#llx", |
2855 | has14 ? " 14bit" : "", | |
2856 | i->relobj()->name().c_str(), | |
2857 | i->relobj()->section_name(i->shndx()).c_str(), | |
2858 | (long long) this_size, | |
a5018ae5 AM |
2859 | (this->state_ == NO_GROUP |
2860 | ? this_size | |
2861 | : (long long) end_addr - this->group_start_addr_)); | |
afe002dd | 2862 | |
1c3a5fbe AM |
2863 | if (this->state_ == NO_GROUP) |
2864 | { | |
2865 | // Only here on very first use of Stub_control | |
2866 | this->owner_ = i; | |
2867 | this->output_section_ = o; | |
2868 | this->state_ = FINDING_STUB_SECTION; | |
2869 | this->group_size_ = group_size; | |
2870 | this->group_start_addr_ = start_addr; | |
2871 | return true; | |
2872 | } | |
2873 | else if (!this->multi_os_ && this->output_section_ != o) | |
2874 | ; | |
2875 | else if (this->state_ == HAS_STUB_SECTION) | |
ec661b9d | 2876 | { |
a5018ae5 | 2877 | // Can we add this section, which is after the stubs, to the |
57f6d32d | 2878 | // group? |
a5018ae5 | 2879 | if (end_addr - this->group_start_addr_ <= this->group_size_) |
57f6d32d | 2880 | return true; |
ec661b9d | 2881 | } |
a5018ae5 | 2882 | else if (this->state_ == FINDING_STUB_SECTION) |
ec661b9d | 2883 | { |
a5018ae5 AM |
2884 | if ((whole_sec && this->output_section_ == o) |
2885 | || end_addr - this->group_start_addr_ <= this->group_size_) | |
57f6d32d | 2886 | { |
a5018ae5 | 2887 | // Stubs are added at the end of "owner_". |
57f6d32d AM |
2888 | this->owner_ = i; |
2889 | this->output_section_ = o; | |
a5018ae5 | 2890 | return true; |
57f6d32d | 2891 | } |
a5018ae5 AM |
2892 | // The group before the stubs has reached maximum size. |
2893 | // Now see about adding sections after the stubs to the | |
2894 | // group. If the current section has a 14-bit branch and | |
2895 | // the group before the stubs exceeds group_size_ (because | |
2896 | // they didn't have 14-bit branches), don't add sections | |
2897 | // after the stubs: The size of stubs for such a large | |
2898 | // group may exceed the reach of a 14-bit branch. | |
2899 | if (!this->stubs_always_after_branch_ | |
2900 | && this_size <= this->group_size_ | |
2901 | && start_addr - this->group_start_addr_ <= this->group_size_) | |
57f6d32d | 2902 | { |
a5018ae5 AM |
2903 | gold_debug(DEBUG_TARGET, "adding after stubs"); |
2904 | this->state_ = HAS_STUB_SECTION; | |
2905 | this->group_start_addr_ = start_addr; | |
57f6d32d AM |
2906 | return true; |
2907 | } | |
ec661b9d | 2908 | } |
a5018ae5 AM |
2909 | else |
2910 | gold_unreachable(); | |
57f6d32d | 2911 | |
1c3a5fbe AM |
2912 | gold_debug(DEBUG_TARGET, |
2913 | !this->multi_os_ && this->output_section_ != o | |
2914 | ? "nope, new output section\n" | |
2915 | : "nope, didn't fit\n"); | |
afe002dd | 2916 | |
57f6d32d AM |
2917 | // The section fails to fit in the current group. Set up a few |
2918 | // things for the next group. owner_ and output_section_ will be | |
2919 | // set later after we've retrieved those values for the current | |
2920 | // group. | |
2921 | this->state_ = FINDING_STUB_SECTION; | |
8a37735f | 2922 | this->group_size_ = group_size; |
a5018ae5 | 2923 | this->group_start_addr_ = start_addr; |
57f6d32d | 2924 | return false; |
ec661b9d AM |
2925 | } |
2926 | ||
2927 | // Look over all the input sections, deciding where to place stubs. | |
2928 | ||
2929 | template<int size, bool big_endian> | |
2930 | void | |
2931 | Target_powerpc<size, big_endian>::group_sections(Layout* layout, | |
a3e60ddb AM |
2932 | const Task*, |
2933 | bool no_size_errors) | |
ec661b9d | 2934 | { |
1c3a5fbe AM |
2935 | Stub_control stub_control(this->stub_group_size_, no_size_errors, |
2936 | parameters->options().stub_group_multi()); | |
ec661b9d AM |
2937 | |
2938 | // Group input sections and insert stub table | |
a3e60ddb AM |
2939 | Stub_table_owner* table_owner = NULL; |
2940 | std::vector<Stub_table_owner*> tables; | |
ec661b9d AM |
2941 | Layout::Section_list section_list; |
2942 | layout->get_executable_sections(§ion_list); | |
2943 | std::stable_sort(section_list.begin(), section_list.end(), Sort_sections()); | |
a5018ae5 AM |
2944 | for (Layout::Section_list::iterator o = section_list.begin(); |
2945 | o != section_list.end(); | |
ec661b9d AM |
2946 | ++o) |
2947 | { | |
2948 | typedef Output_section::Input_section_list Input_section_list; | |
a5018ae5 AM |
2949 | for (Input_section_list::const_iterator i |
2950 | = (*o)->input_sections().begin(); | |
2951 | i != (*o)->input_sections().end(); | |
ec661b9d AM |
2952 | ++i) |
2953 | { | |
a3e60ddb AM |
2954 | if (i->is_input_section() |
2955 | || i->is_relaxed_input_section()) | |
ec661b9d AM |
2956 | { |
2957 | Powerpc_relobj<size, big_endian>* ppcobj = static_cast | |
2958 | <Powerpc_relobj<size, big_endian>*>(i->relobj()); | |
2959 | bool has14 = ppcobj->has_14bit_branch(i->shndx()); | |
2960 | if (!stub_control.can_add_to_stub_group(*o, &*i, has14)) | |
2961 | { | |
a3e60ddb AM |
2962 | table_owner->output_section = stub_control.output_section(); |
2963 | table_owner->owner = stub_control.owner(); | |
a20605cf | 2964 | stub_control.set_output_and_owner(*o, &*i); |
a3e60ddb | 2965 | table_owner = NULL; |
ec661b9d | 2966 | } |
a3e60ddb AM |
2967 | if (table_owner == NULL) |
2968 | { | |
2969 | table_owner = new Stub_table_owner; | |
2970 | tables.push_back(table_owner); | |
2971 | } | |
2972 | ppcobj->set_stub_table(i->shndx(), tables.size() - 1); | |
ec661b9d AM |
2973 | } |
2974 | } | |
2975 | } | |
a3e60ddb | 2976 | if (table_owner != NULL) |
0cfdc767 | 2977 | { |
a5018ae5 AM |
2978 | table_owner->output_section = stub_control.output_section(); |
2979 | table_owner->owner = stub_control.owner();; | |
a3e60ddb AM |
2980 | } |
2981 | for (typename std::vector<Stub_table_owner*>::iterator t = tables.begin(); | |
2982 | t != tables.end(); | |
2983 | ++t) | |
2984 | { | |
2985 | Stub_table<size, big_endian>* stub_table; | |
2986 | ||
2987 | if ((*t)->owner->is_input_section()) | |
2988 | stub_table = new Stub_table<size, big_endian>(this, | |
2989 | (*t)->output_section, | |
590b87ff AM |
2990 | (*t)->owner, |
2991 | this->stub_tables_.size()); | |
a3e60ddb AM |
2992 | else if ((*t)->owner->is_relaxed_input_section()) |
2993 | stub_table = static_cast<Stub_table<size, big_endian>*>( | |
2994 | (*t)->owner->relaxed_input_section()); | |
0cfdc767 | 2995 | else |
a3e60ddb AM |
2996 | gold_unreachable(); |
2997 | this->stub_tables_.push_back(stub_table); | |
2998 | delete *t; | |
0cfdc767 | 2999 | } |
ec661b9d AM |
3000 | } |
3001 | ||
a3e60ddb AM |
3002 | static unsigned long |
3003 | max_branch_delta (unsigned int r_type) | |
3004 | { | |
3005 | if (r_type == elfcpp::R_POWERPC_REL14 | |
3006 | || r_type == elfcpp::R_POWERPC_REL14_BRTAKEN | |
3007 | || r_type == elfcpp::R_POWERPC_REL14_BRNTAKEN) | |
3008 | return 1L << 15; | |
3009 | if (r_type == elfcpp::R_POWERPC_REL24 | |
3010 | || r_type == elfcpp::R_PPC_PLTREL24 | |
3011 | || r_type == elfcpp::R_PPC_LOCAL24PC) | |
3012 | return 1L << 25; | |
3013 | return 0; | |
3014 | } | |
3015 | ||
7e57d19e AM |
3016 | // Return whether this branch is going via a plt call stub. |
3017 | ||
3018 | template<int size, bool big_endian> | |
3019 | bool | |
3020 | Target_powerpc<size, big_endian>::Branch_info::mark_pltcall( | |
3021 | Powerpc_relobj<size, big_endian>* ppc_object, | |
3022 | unsigned int shndx, | |
3023 | Address offset, | |
3024 | Target_powerpc* target, | |
3025 | Symbol_table* symtab) | |
3026 | { | |
3027 | if (this->object_ != ppc_object | |
3028 | || this->shndx_ != shndx | |
3029 | || this->offset_ != offset) | |
3030 | return false; | |
3031 | ||
3032 | Symbol* sym = this->object_->global_symbol(this->r_sym_); | |
3033 | if (sym != NULL && sym->is_forwarder()) | |
3034 | sym = symtab->resolve_forwards(sym); | |
3035 | const Sized_symbol<size>* gsym = static_cast<const Sized_symbol<size>*>(sym); | |
3036 | if (gsym != NULL | |
7ee7ff70 AM |
3037 | ? (gsym->use_plt_offset(Scan::get_reference_flags(this->r_type_, target)) |
3038 | && !target->is_elfv2_localentry0(gsym)) | |
3039 | : (this->object_->local_has_plt_offset(this->r_sym_) | |
3040 | && !target->is_elfv2_localentry0(this->object_, this->r_sym_))) | |
7e57d19e AM |
3041 | { |
3042 | this->tocsave_ = 1; | |
3043 | return true; | |
3044 | } | |
3045 | return false; | |
3046 | } | |
3047 | ||
ec661b9d AM |
3048 | // If this branch needs a plt call stub, or a long branch stub, make one. |
3049 | ||
3050 | template<int size, bool big_endian> | |
a3e60ddb | 3051 | bool |
ec661b9d AM |
3052 | Target_powerpc<size, big_endian>::Branch_info::make_stub( |
3053 | Stub_table<size, big_endian>* stub_table, | |
3054 | Stub_table<size, big_endian>* ifunc_stub_table, | |
3055 | Symbol_table* symtab) const | |
3056 | { | |
3057 | Symbol* sym = this->object_->global_symbol(this->r_sym_); | |
3058 | if (sym != NULL && sym->is_forwarder()) | |
3059 | sym = symtab->resolve_forwards(sym); | |
3060 | const Sized_symbol<size>* gsym = static_cast<const Sized_symbol<size>*>(sym); | |
88b8e639 AM |
3061 | Target_powerpc<size, big_endian>* target = |
3062 | static_cast<Target_powerpc<size, big_endian>*>( | |
3063 | parameters->sized_target<size, big_endian>()); | |
dc60b26d AM |
3064 | bool ok = true; |
3065 | ||
ec661b9d | 3066 | if (gsym != NULL |
88b8e639 | 3067 | ? gsym->use_plt_offset(Scan::get_reference_flags(this->r_type_, target)) |
ec661b9d AM |
3068 | : this->object_->local_has_plt_offset(this->r_sym_)) |
3069 | { | |
9055360d AM |
3070 | if (size == 64 |
3071 | && gsym != NULL | |
3072 | && target->abiversion() >= 2 | |
3073 | && !parameters->options().output_is_position_independent() | |
3074 | && !is_branch_reloc(this->r_type_)) | |
3075 | target->glink_section()->add_global_entry(gsym); | |
3076 | else | |
ec661b9d | 3077 | { |
9055360d AM |
3078 | if (stub_table == NULL) |
3079 | stub_table = this->object_->stub_table(this->shndx_); | |
3080 | if (stub_table == NULL) | |
3081 | { | |
3082 | // This is a ref from a data section to an ifunc symbol. | |
3083 | stub_table = ifunc_stub_table; | |
3084 | } | |
3085 | gold_assert(stub_table != NULL); | |
a3e60ddb AM |
3086 | Address from = this->object_->get_output_section_offset(this->shndx_); |
3087 | if (from != invalid_address) | |
3088 | from += (this->object_->output_section(this->shndx_)->address() | |
3089 | + this->offset_); | |
9055360d | 3090 | if (gsym != NULL) |
dc60b26d AM |
3091 | ok = stub_table->add_plt_call_entry(from, |
3092 | this->object_, gsym, | |
7e57d19e AM |
3093 | this->r_type_, this->addend_, |
3094 | this->tocsave_); | |
9055360d | 3095 | else |
dc60b26d AM |
3096 | ok = stub_table->add_plt_call_entry(from, |
3097 | this->object_, this->r_sym_, | |
7e57d19e AM |
3098 | this->r_type_, this->addend_, |
3099 | this->tocsave_); | |
ec661b9d | 3100 | } |
ec661b9d AM |
3101 | } |
3102 | else | |
3103 | { | |
cbcb23fa | 3104 | Address max_branch_offset = max_branch_delta(this->r_type_); |
a3e60ddb AM |
3105 | if (max_branch_offset == 0) |
3106 | return true; | |
ec661b9d AM |
3107 | Address from = this->object_->get_output_section_offset(this->shndx_); |
3108 | gold_assert(from != invalid_address); | |
3109 | from += (this->object_->output_section(this->shndx_)->address() | |
3110 | + this->offset_); | |
3111 | Address to; | |
3112 | if (gsym != NULL) | |
3113 | { | |
3114 | switch (gsym->source()) | |
3115 | { | |
3116 | case Symbol::FROM_OBJECT: | |
3117 | { | |
3118 | Object* symobj = gsym->object(); | |
3119 | if (symobj->is_dynamic() | |
3120 | || symobj->pluginobj() != NULL) | |
a3e60ddb | 3121 | return true; |
ec661b9d AM |
3122 | bool is_ordinary; |
3123 | unsigned int shndx = gsym->shndx(&is_ordinary); | |
3124 | if (shndx == elfcpp::SHN_UNDEF) | |
a3e60ddb | 3125 | return true; |
ec661b9d AM |
3126 | } |
3127 | break; | |
3128 | ||
3129 | case Symbol::IS_UNDEFINED: | |
a3e60ddb | 3130 | return true; |
ec661b9d AM |
3131 | |
3132 | default: | |
3133 | break; | |
3134 | } | |
3135 | Symbol_table::Compute_final_value_status status; | |
3136 | to = symtab->compute_final_value<size>(gsym, &status); | |
3137 | if (status != Symbol_table::CFVS_OK) | |
a3e60ddb | 3138 | return true; |
9055360d AM |
3139 | if (size == 64) |
3140 | to += this->object_->ppc64_local_entry_offset(gsym); | |
ec661b9d AM |
3141 | } |
3142 | else | |
3143 | { | |
3144 | const Symbol_value<size>* psymval | |
3145 | = this->object_->local_symbol(this->r_sym_); | |
3146 | Symbol_value<size> symval; | |
0f125432 CC |
3147 | if (psymval->is_section_symbol()) |
3148 | symval.set_is_section_symbol(); | |
ec661b9d AM |
3149 | typedef Sized_relobj_file<size, big_endian> ObjType; |
3150 | typename ObjType::Compute_final_local_value_status status | |
3151 | = this->object_->compute_final_local_value(this->r_sym_, psymval, | |
3152 | &symval, symtab); | |
3153 | if (status != ObjType::CFLV_OK | |
3154 | || !symval.has_output_value()) | |
a3e60ddb | 3155 | return true; |
ec661b9d | 3156 | to = symval.value(this->object_, 0); |
9055360d AM |
3157 | if (size == 64) |
3158 | to += this->object_->ppc64_local_entry_offset(this->r_sym_); | |
ec661b9d | 3159 | } |
cbcb23fa AM |
3160 | if (!(size == 32 && this->r_type_ == elfcpp::R_PPC_PLTREL24)) |
3161 | to += this->addend_; | |
ec661b9d AM |
3162 | if (stub_table == NULL) |
3163 | stub_table = this->object_->stub_table(this->shndx_); | |
9055360d | 3164 | if (size == 64 && target->abiversion() < 2) |
ec661b9d AM |
3165 | { |
3166 | unsigned int dest_shndx; | |
1611bc4a AM |
3167 | if (!target->symval_for_branch(symtab, gsym, this->object_, |
3168 | &to, &dest_shndx)) | |
3169 | return true; | |
ec661b9d AM |
3170 | } |
3171 | Address delta = to - from; | |
3172 | if (delta + max_branch_offset >= 2 * max_branch_offset) | |
3173 | { | |
0cfdc767 AM |
3174 | if (stub_table == NULL) |
3175 | { | |
3176 | gold_warning(_("%s:%s: branch in non-executable section," | |
3177 | " no long branch stub for you"), | |
3178 | this->object_->name().c_str(), | |
3179 | this->object_->section_name(this->shndx_).c_str()); | |
a3e60ddb | 3180 | return true; |
0cfdc767 | 3181 | } |
d49044c7 AM |
3182 | bool save_res = (size == 64 |
3183 | && gsym != NULL | |
3184 | && gsym->source() == Symbol::IN_OUTPUT_DATA | |
3185 | && gsym->output_data() == target->savres_section()); | |
dc60b26d AM |
3186 | ok = stub_table->add_long_branch_entry(this->object_, |
3187 | this->r_type_, | |
3188 | from, to, save_res); | |
ec661b9d AM |
3189 | } |
3190 | } | |
dc60b26d AM |
3191 | if (!ok) |
3192 | gold_debug(DEBUG_TARGET, | |
3193 | "branch at %s:%s+%#lx\n" | |
3194 | "can't reach stub attached to %s:%s", | |
3195 | this->object_->name().c_str(), | |
3196 | this->object_->section_name(this->shndx_).c_str(), | |
3197 | (unsigned long) this->offset_, | |
3198 | stub_table->relobj()->name().c_str(), | |
3199 | stub_table->relobj()->section_name(stub_table->shndx()).c_str()); | |
3200 | ||
3201 | return ok; | |
ec661b9d AM |
3202 | } |
3203 | ||
3204 | // Relaxation hook. This is where we do stub generation. | |
3205 | ||
3206 | template<int size, bool big_endian> | |
3207 | bool | |
3208 | Target_powerpc<size, big_endian>::do_relax(int pass, | |
3209 | const Input_objects*, | |
3210 | Symbol_table* symtab, | |
3211 | Layout* layout, | |
3212 | const Task* task) | |
3213 | { | |
3214 | unsigned int prev_brlt_size = 0; | |
3215 | if (pass == 1) | |
ec661b9d | 3216 | { |
b4f7960d AM |
3217 | bool thread_safe |
3218 | = this->abiversion() < 2 && parameters->options().plt_thread_safe(); | |
3219 | if (size == 64 | |
3220 | && this->abiversion() < 2 | |
3221 | && !thread_safe | |
3222 | && !parameters->options().user_set_plt_thread_safe()) | |
ec661b9d | 3223 | { |
e2458743 | 3224 | static const char* const thread_starter[] = |
9e69ed50 AM |
3225 | { |
3226 | "pthread_create", | |
3227 | /* libstdc++ */ | |
3228 | "_ZNSt6thread15_M_start_threadESt10shared_ptrINS_10_Impl_baseEE", | |
3229 | /* librt */ | |
3230 | "aio_init", "aio_read", "aio_write", "aio_fsync", "lio_listio", | |
3231 | "mq_notify", "create_timer", | |
3232 | /* libanl */ | |
3233 | "getaddrinfo_a", | |
3234 | /* libgomp */ | |
80272b8c | 3235 | "GOMP_parallel", |
9e69ed50 | 3236 | "GOMP_parallel_start", |
80272b8c | 3237 | "GOMP_parallel_loop_static", |
9e69ed50 | 3238 | "GOMP_parallel_loop_static_start", |
80272b8c | 3239 | "GOMP_parallel_loop_dynamic", |
9e69ed50 | 3240 | "GOMP_parallel_loop_dynamic_start", |
80272b8c | 3241 | "GOMP_parallel_loop_guided", |
9e69ed50 | 3242 | "GOMP_parallel_loop_guided_start", |
80272b8c | 3243 | "GOMP_parallel_loop_runtime", |
9e69ed50 | 3244 | "GOMP_parallel_loop_runtime_start", |
80272b8c | 3245 | "GOMP_parallel_sections", |
43819297 | 3246 | "GOMP_parallel_sections_start", |
f9dffbf0 AM |
3247 | /* libgo */ |
3248 | "__go_go", | |
9e69ed50 AM |
3249 | }; |
3250 | ||
e2458743 AM |
3251 | if (parameters->options().shared()) |
3252 | thread_safe = true; | |
3253 | else | |
9e69ed50 | 3254 | { |
e2458743 AM |
3255 | for (unsigned int i = 0; |
3256 | i < sizeof(thread_starter) / sizeof(thread_starter[0]); | |
3257 | i++) | |
3258 | { | |
3259 | Symbol* sym = symtab->lookup(thread_starter[i], NULL); | |
3260 | thread_safe = (sym != NULL | |
3261 | && sym->in_reg() | |
3262 | && sym->in_real_elf()); | |
3263 | if (thread_safe) | |
3264 | break; | |
3265 | } | |
9e69ed50 | 3266 | } |
ec661b9d | 3267 | } |
9e69ed50 | 3268 | this->plt_thread_safe_ = thread_safe; |
a3e60ddb AM |
3269 | } |
3270 | ||
3271 | if (pass == 1) | |
3272 | { | |
3273 | this->stub_group_size_ = parameters->options().stub_group_size(); | |
3274 | bool no_size_errors = true; | |
3275 | if (this->stub_group_size_ == 1) | |
3276 | this->stub_group_size_ = 0x1c00000; | |
3277 | else if (this->stub_group_size_ == -1) | |
3278 | this->stub_group_size_ = -0x1e00000; | |
3279 | else | |
3280 | no_size_errors = false; | |
3281 | this->group_sections(layout, task, no_size_errors); | |
3282 | } | |
3283 | else if (this->relax_failed_ && this->relax_fail_count_ < 3) | |
3284 | { | |
3285 | this->branch_lookup_table_.clear(); | |
3286 | for (typename Stub_tables::iterator p = this->stub_tables_.begin(); | |
3287 | p != this->stub_tables_.end(); | |
3288 | ++p) | |
3289 | { | |
3290 | (*p)->clear_stubs(true); | |
3291 | } | |
3292 | this->stub_tables_.clear(); | |
3293 | this->stub_group_size_ = this->stub_group_size_ / 4 * 3; | |
57f6d32d | 3294 | gold_info(_("%s: stub group size is too large; retrying with %#x"), |
a3e60ddb AM |
3295 | program_name, this->stub_group_size_); |
3296 | this->group_sections(layout, task, true); | |
ec661b9d AM |
3297 | } |
3298 | ||
3299 | // We need address of stub tables valid for make_stub. | |
3300 | for (typename Stub_tables::iterator p = this->stub_tables_.begin(); | |
3301 | p != this->stub_tables_.end(); | |
3302 | ++p) | |
3303 | { | |
3304 | const Powerpc_relobj<size, big_endian>* object | |
3305 | = static_cast<const Powerpc_relobj<size, big_endian>*>((*p)->relobj()); | |
3306 | Address off = object->get_output_section_offset((*p)->shndx()); | |
3307 | gold_assert(off != invalid_address); | |
3308 | Output_section* os = (*p)->output_section(); | |
3309 | (*p)->set_address_and_size(os, off); | |
3310 | } | |
3311 | ||
9e69ed50 AM |
3312 | if (pass != 1) |
3313 | { | |
3314 | // Clear plt call stubs, long branch stubs and branch lookup table. | |
3315 | prev_brlt_size = this->branch_lookup_table_.size(); | |
3316 | this->branch_lookup_table_.clear(); | |
3317 | for (typename Stub_tables::iterator p = this->stub_tables_.begin(); | |
3318 | p != this->stub_tables_.end(); | |
3319 | ++p) | |
3320 | { | |
a3e60ddb | 3321 | (*p)->clear_stubs(false); |
9e69ed50 AM |
3322 | } |
3323 | } | |
3324 | ||
3325 | // Build all the stubs. | |
a3e60ddb | 3326 | this->relax_failed_ = false; |
ec661b9d AM |
3327 | Stub_table<size, big_endian>* ifunc_stub_table |
3328 | = this->stub_tables_.size() == 0 ? NULL : this->stub_tables_[0]; | |
3329 | Stub_table<size, big_endian>* one_stub_table | |
3330 | = this->stub_tables_.size() != 1 ? NULL : ifunc_stub_table; | |
3331 | for (typename Branches::const_iterator b = this->branch_info_.begin(); | |
3332 | b != this->branch_info_.end(); | |
3333 | b++) | |
3334 | { | |
a3e60ddb AM |
3335 | if (!b->make_stub(one_stub_table, ifunc_stub_table, symtab) |
3336 | && !this->relax_failed_) | |
3337 | { | |
3338 | this->relax_failed_ = true; | |
3339 | this->relax_fail_count_++; | |
3340 | if (this->relax_fail_count_ < 3) | |
3341 | return true; | |
3342 | } | |
ec661b9d AM |
3343 | } |
3344 | ||
9e69ed50 | 3345 | // Did anything change size? |
ec661b9d AM |
3346 | unsigned int num_huge_branches = this->branch_lookup_table_.size(); |
3347 | bool again = num_huge_branches != prev_brlt_size; | |
3348 | if (size == 64 && num_huge_branches != 0) | |
3349 | this->make_brlt_section(layout); | |
3350 | if (size == 64 && again) | |
3351 | this->brlt_section_->set_current_size(num_huge_branches); | |
3352 | ||
be897fb7 AM |
3353 | for (typename Stub_tables::reverse_iterator p = this->stub_tables_.rbegin(); |
3354 | p != this->stub_tables_.rend(); | |
3355 | ++p) | |
3356 | (*p)->remove_eh_frame(layout); | |
3357 | ||
3358 | for (typename Stub_tables::iterator p = this->stub_tables_.begin(); | |
3359 | p != this->stub_tables_.end(); | |
3360 | ++p) | |
3361 | (*p)->add_eh_frame(layout); | |
3362 | ||
ec661b9d AM |
3363 | typedef Unordered_set<Output_section*> Output_sections; |
3364 | Output_sections os_need_update; | |
3365 | for (typename Stub_tables::iterator p = this->stub_tables_.begin(); | |
3366 | p != this->stub_tables_.end(); | |
3367 | ++p) | |
3368 | { | |
3369 | if ((*p)->size_update()) | |
3370 | { | |
3371 | again = true; | |
3372 | os_need_update.insert((*p)->output_section()); | |
3373 | } | |
3374 | } | |
3375 | ||
9e69ed50 AM |
3376 | // Set output section offsets for all input sections in an output |
3377 | // section that just changed size. Anything past the stubs will | |
3378 | // need updating. | |
ec661b9d AM |
3379 | for (typename Output_sections::iterator p = os_need_update.begin(); |
3380 | p != os_need_update.end(); | |
3381 | p++) | |
3382 | { | |
3383 | Output_section* os = *p; | |
3384 | Address off = 0; | |
3385 | typedef Output_section::Input_section_list Input_section_list; | |
3386 | for (Input_section_list::const_iterator i = os->input_sections().begin(); | |
3387 | i != os->input_sections().end(); | |
3388 | ++i) | |
3389 | { | |
3390 | off = align_address(off, i->addralign()); | |
3391 | if (i->is_input_section() || i->is_relaxed_input_section()) | |
3392 | i->relobj()->set_section_offset(i->shndx(), off); | |
3393 | if (i->is_relaxed_input_section()) | |
3394 | { | |
3395 | Stub_table<size, big_endian>* stub_table | |
3396 | = static_cast<Stub_table<size, big_endian>*>( | |
3397 | i->relaxed_input_section()); | |
6395d38b HS |
3398 | Address stub_table_size = stub_table->set_address_and_size(os, off); |
3399 | off += stub_table_size; | |
3400 | // After a few iterations, set current stub table size | |
3401 | // as min size threshold, so later stub tables can only | |
3402 | // grow in size. | |
3403 | if (pass >= 4) | |
3404 | stub_table->set_min_size_threshold(stub_table_size); | |
ec661b9d AM |
3405 | } |
3406 | else | |
3407 | off += i->data_size(); | |
3408 | } | |
6830ee24 AM |
3409 | // If .branch_lt is part of this output section, then we have |
3410 | // just done the offset adjustment. | |
ec661b9d AM |
3411 | os->clear_section_offsets_need_adjustment(); |
3412 | } | |
3413 | ||
3414 | if (size == 64 | |
3415 | && !again | |
3416 | && num_huge_branches != 0 | |
3417 | && parameters->options().output_is_position_independent()) | |
3418 | { | |
3419 | // Fill in the BRLT relocs. | |
06f30c9d | 3420 | this->brlt_section_->reset_brlt_sizes(); |
ec661b9d AM |
3421 | for (typename Branch_lookup_table::const_iterator p |
3422 | = this->branch_lookup_table_.begin(); | |
3423 | p != this->branch_lookup_table_.end(); | |
3424 | ++p) | |
3425 | { | |
3426 | this->brlt_section_->add_reloc(p->first, p->second); | |
3427 | } | |
06f30c9d | 3428 | this->brlt_section_->finalize_brlt_sizes(); |
ec661b9d | 3429 | } |
590b87ff AM |
3430 | |
3431 | if (!again | |
3432 | && (parameters->options().user_set_emit_stub_syms() | |
3433 | ? parameters->options().emit_stub_syms() | |
3434 | : (size == 64 | |
3435 | || parameters->options().output_is_position_independent() | |
3436 | || parameters->options().emit_relocs()))) | |
3437 | { | |
3438 | for (typename Stub_tables::iterator p = this->stub_tables_.begin(); | |
3439 | p != this->stub_tables_.end(); | |
3440 | ++p) | |
3441 | (*p)->define_stub_syms(symtab); | |
3442 | ||
3443 | if (this->glink_ != NULL) | |
3444 | { | |
3445 | int stub_size = this->glink_->pltresolve_size; | |
3446 | Address value = -stub_size; | |
3447 | if (size == 64) | |
3448 | { | |
3449 | value = 8; | |
3450 | stub_size -= 8; | |
3451 | } | |
3452 | this->define_local(symtab, "__glink_PLTresolve", | |
3453 | this->glink_, value, stub_size); | |
3454 | ||
3455 | if (size != 64) | |
3456 | this->define_local(symtab, "__glink", this->glink_, 0, 0); | |
3457 | } | |
3458 | } | |
3459 | ||
ec661b9d AM |
3460 | return again; |
3461 | } | |
3462 | ||
9d5781f8 AM |
3463 | template<int size, bool big_endian> |
3464 | void | |
3465 | Target_powerpc<size, big_endian>::do_plt_fde_location(const Output_data* plt, | |
3466 | unsigned char* oview, | |
3467 | uint64_t* paddress, | |
3468 | off_t* plen) const | |
3469 | { | |
3470 | uint64_t address = plt->address(); | |
3471 | off_t len = plt->data_size(); | |
3472 | ||
3473 | if (plt == this->glink_) | |
3474 | { | |
3475 | // See Output_data_glink::do_write() for glink contents. | |
5fe7ffdc AM |
3476 | if (len == 0) |
3477 | { | |
3478 | gold_assert(parameters->doing_static_link()); | |
3479 | // Static linking may need stubs, to support ifunc and long | |
3480 | // branches. We need to create an output section for | |
3481 | // .eh_frame early in the link process, to have a place to | |
3482 | // attach stub .eh_frame info. We also need to have | |
3483 | // registered a CIE that matches the stub CIE. Both of | |
3484 | // these requirements are satisfied by creating an FDE and | |
3485 | // CIE for .glink, even though static linking will leave | |
3486 | // .glink zero length. | |
3487 | // ??? Hopefully generating an FDE with a zero address range | |
3488 | // won't confuse anything that consumes .eh_frame info. | |
3489 | } | |
3490 | else if (size == 64) | |
9d5781f8 AM |
3491 | { |
3492 | // There is one word before __glink_PLTresolve | |
3493 | address += 8; | |
3494 | len -= 8; | |
3495 | } | |
3496 | else if (parameters->options().output_is_position_independent()) | |
3497 | { | |
3498 | // There are two FDEs for a position independent glink. | |
3499 | // The first covers the branch table, the second | |
3500 | // __glink_PLTresolve at the end of glink. | |
3501 | off_t resolve_size = this->glink_->pltresolve_size; | |
5fe7ffdc | 3502 | if (oview[9] == elfcpp::DW_CFA_nop) |
9d5781f8 AM |
3503 | len -= resolve_size; |
3504 | else | |
3505 | { | |
3506 | address += len - resolve_size; | |
3507 | len = resolve_size; | |
3508 | } | |
3509 | } | |
3510 | } | |
3511 | else | |
3512 | { | |
3513 | // Must be a stub table. | |
3514 | const Stub_table<size, big_endian>* stub_table | |
3515 | = static_cast<const Stub_table<size, big_endian>*>(plt); | |
3516 | uint64_t stub_address = stub_table->stub_address(); | |
3517 | len -= stub_address - address; | |
3518 | address = stub_address; | |
3519 | } | |
3520 | ||
3521 | *paddress = address; | |
3522 | *plen = len; | |
3523 | } | |
3524 | ||
42cacb20 DE |
3525 | // A class to handle the PLT data. |
3526 | ||
3527 | template<int size, bool big_endian> | |
cf43a2fe | 3528 | class Output_data_plt_powerpc : public Output_section_data_build |
42cacb20 DE |
3529 | { |
3530 | public: | |
3531 | typedef Output_data_reloc<elfcpp::SHT_RELA, true, | |
3532 | size, big_endian> Reloc_section; | |
3533 | ||
e5d5f5ed AM |
3534 | Output_data_plt_powerpc(Target_powerpc<size, big_endian>* targ, |
3535 | Reloc_section* plt_rel, | |
e5d5f5ed AM |
3536 | const char* name) |
3537 | : Output_section_data_build(size == 32 ? 4 : 8), | |
3538 | rel_(plt_rel), | |
3539 | targ_(targ), | |
e5d5f5ed AM |
3540 | name_(name) |
3541 | { } | |
42cacb20 DE |
3542 | |
3543 | // Add an entry to the PLT. | |
03e25981 | 3544 | void |
cf43a2fe | 3545 | add_entry(Symbol*); |
42cacb20 | 3546 | |
03e25981 | 3547 | void |
e5d5f5ed AM |
3548 | add_ifunc_entry(Symbol*); |
3549 | ||
03e25981 | 3550 | void |
e5d5f5ed AM |
3551 | add_local_ifunc_entry(Sized_relobj_file<size, big_endian>*, unsigned int); |
3552 | ||
42cacb20 | 3553 | // Return the .rela.plt section data. |
e5d5f5ed | 3554 | Reloc_section* |
cf43a2fe AM |
3555 | rel_plt() const |
3556 | { | |
42cacb20 DE |
3557 | return this->rel_; |
3558 | } | |
3559 | ||
0e70b911 CC |
3560 | // Return the number of PLT entries. |
3561 | unsigned int | |
3562 | entry_count() const | |
d83ce4e3 | 3563 | { |
b3ccdeb5 AM |
3564 | if (this->current_data_size() == 0) |
3565 | return 0; | |
b4f7960d AM |
3566 | return ((this->current_data_size() - this->first_plt_entry_offset()) |
3567 | / this->plt_entry_size()); | |
d83ce4e3 | 3568 | } |
0e70b911 | 3569 | |
42cacb20 | 3570 | protected: |
42cacb20 | 3571 | void |
cf43a2fe | 3572 | do_adjust_output_section(Output_section* os) |
42cacb20 | 3573 | { |
cf43a2fe | 3574 | os->set_entsize(0); |
42cacb20 DE |
3575 | } |
3576 | ||
6ce78956 AM |
3577 | // Write to a map file. |
3578 | void | |
3579 | do_print_to_mapfile(Mapfile* mapfile) const | |
e5d5f5ed | 3580 | { mapfile->print_output_data(this, this->name_); } |
6ce78956 | 3581 | |
cf43a2fe | 3582 | private: |
b4f7960d AM |
3583 | // Return the offset of the first non-reserved PLT entry. |
3584 | unsigned int | |
3585 | first_plt_entry_offset() const | |
3586 | { | |
3587 | // IPLT has no reserved entry. | |
3588 | if (this->name_[3] == 'I') | |
3589 | return 0; | |
3590 | return this->targ_->first_plt_entry_offset(); | |
3591 | } | |
3592 | ||
3593 | // Return the size of each PLT entry. | |
3594 | unsigned int | |
3595 | plt_entry_size() const | |
3596 | { | |
3597 | return this->targ_->plt_entry_size(); | |
3598 | } | |
cf43a2fe | 3599 | |
42cacb20 DE |
3600 | // Write out the PLT data. |
3601 | void | |
3602 | do_write(Output_file*); | |
3603 | ||
3604 | // The reloc section. | |
3605 | Reloc_section* rel_; | |
cf43a2fe AM |
3606 | // Allows access to .glink for do_write. |
3607 | Target_powerpc<size, big_endian>* targ_; | |
e5d5f5ed AM |
3608 | // What to report in map file. |
3609 | const char *name_; | |
42cacb20 DE |
3610 | }; |
3611 | ||
e5d5f5ed | 3612 | // Add an entry to the PLT. |
42cacb20 DE |
3613 | |
3614 | template<int size, bool big_endian> | |
03e25981 | 3615 | void |
e5d5f5ed | 3616 | Output_data_plt_powerpc<size, big_endian>::add_entry(Symbol* gsym) |
42cacb20 | 3617 | { |
e5d5f5ed AM |
3618 | if (!gsym->has_plt_offset()) |
3619 | { | |
ec661b9d | 3620 | section_size_type off = this->current_data_size(); |
e5d5f5ed AM |
3621 | if (off == 0) |
3622 | off += this->first_plt_entry_offset(); | |
3623 | gsym->set_plt_offset(off); | |
3624 | gsym->set_needs_dynsym_entry(); | |
3625 | unsigned int dynrel = elfcpp::R_POWERPC_JMP_SLOT; | |
3626 | this->rel_->add_global(gsym, dynrel, this, off, 0); | |
b4f7960d | 3627 | off += this->plt_entry_size(); |
e5d5f5ed AM |
3628 | this->set_current_data_size(off); |
3629 | } | |
42cacb20 DE |
3630 | } |
3631 | ||
e5d5f5ed | 3632 | // Add an entry for a global ifunc symbol that resolves locally, to the IPLT. |
42cacb20 DE |
3633 | |
3634 | template<int size, bool big_endian> | |
03e25981 | 3635 | void |
e5d5f5ed | 3636 | Output_data_plt_powerpc<size, big_endian>::add_ifunc_entry(Symbol* gsym) |
42cacb20 | 3637 | { |
cf43a2fe AM |
3638 | if (!gsym->has_plt_offset()) |
3639 | { | |
ec661b9d | 3640 | section_size_type off = this->current_data_size(); |
cf43a2fe | 3641 | gsym->set_plt_offset(off); |
e5d5f5ed | 3642 | unsigned int dynrel = elfcpp::R_POWERPC_IRELATIVE; |
b4f7960d | 3643 | if (size == 64 && this->targ_->abiversion() < 2) |
e5d5f5ed AM |
3644 | dynrel = elfcpp::R_PPC64_JMP_IREL; |
3645 | this->rel_->add_symbolless_global_addend(gsym, dynrel, this, off, 0); | |
b4f7960d | 3646 | off += this->plt_entry_size(); |
e5d5f5ed AM |
3647 | this->set_current_data_size(off); |
3648 | } | |
3649 | } | |
3650 | ||
3651 | // Add an entry for a local ifunc symbol to the IPLT. | |
3652 | ||
3653 | template<int size, bool big_endian> | |
03e25981 | 3654 | void |
e5d5f5ed AM |
3655 | Output_data_plt_powerpc<size, big_endian>::add_local_ifunc_entry( |
3656 | Sized_relobj_file<size, big_endian>* relobj, | |
3657 | unsigned int local_sym_index) | |
3658 | { | |
3659 | if (!relobj->local_has_plt_offset(local_sym_index)) | |
3660 | { | |
ec661b9d | 3661 | section_size_type off = this->current_data_size(); |
e5d5f5ed AM |
3662 | relobj->set_local_plt_offset(local_sym_index, off); |
3663 | unsigned int dynrel = elfcpp::R_POWERPC_IRELATIVE; | |
b4f7960d | 3664 | if (size == 64 && this->targ_->abiversion() < 2) |
e5d5f5ed AM |
3665 | dynrel = elfcpp::R_PPC64_JMP_IREL; |
3666 | this->rel_->add_symbolless_local_addend(relobj, local_sym_index, dynrel, | |
3667 | this, off, 0); | |
b4f7960d | 3668 | off += this->plt_entry_size(); |
cf43a2fe AM |
3669 | this->set_current_data_size(off); |
3670 | } | |
42cacb20 DE |
3671 | } |
3672 | ||
dd93cd0a | 3673 | static const uint32_t add_0_11_11 = 0x7c0b5a14; |
9e69ed50 | 3674 | static const uint32_t add_2_2_11 = 0x7c425a14; |
549dba71 | 3675 | static const uint32_t add_2_2_12 = 0x7c426214; |
dd93cd0a AM |
3676 | static const uint32_t add_3_3_2 = 0x7c631214; |
3677 | static const uint32_t add_3_3_13 = 0x7c636a14; | |
3678 | static const uint32_t add_11_0_11 = 0x7d605a14; | |
b4f7960d AM |
3679 | static const uint32_t add_11_2_11 = 0x7d625a14; |
3680 | static const uint32_t add_11_11_2 = 0x7d6b1214; | |
3681 | static const uint32_t addi_0_12 = 0x380c0000; | |
dd93cd0a | 3682 | static const uint32_t addi_2_2 = 0x38420000; |
dd93cd0a | 3683 | static const uint32_t addi_3_3 = 0x38630000; |
b4f7960d | 3684 | static const uint32_t addi_11_11 = 0x396b0000; |
bbec1a5d | 3685 | static const uint32_t addi_12_1 = 0x39810000; |
b4f7960d | 3686 | static const uint32_t addi_12_12 = 0x398c0000; |
dd93cd0a AM |
3687 | static const uint32_t addis_0_2 = 0x3c020000; |
3688 | static const uint32_t addis_0_13 = 0x3c0d0000; | |
bbec1a5d | 3689 | static const uint32_t addis_2_12 = 0x3c4c0000; |
b4f7960d | 3690 | static const uint32_t addis_11_2 = 0x3d620000; |
c9269dff AM |
3691 | static const uint32_t addis_11_11 = 0x3d6b0000; |
3692 | static const uint32_t addis_11_30 = 0x3d7e0000; | |
bbec1a5d | 3693 | static const uint32_t addis_12_1 = 0x3d810000; |
397998fc | 3694 | static const uint32_t addis_12_2 = 0x3d820000; |
c9269dff | 3695 | static const uint32_t addis_12_12 = 0x3d8c0000; |
c9269dff AM |
3696 | static const uint32_t b = 0x48000000; |
3697 | static const uint32_t bcl_20_31 = 0x429f0005; | |
3698 | static const uint32_t bctr = 0x4e800420; | |
f3a0ed29 | 3699 | static const uint32_t blr = 0x4e800020; |
9e69ed50 | 3700 | static const uint32_t bnectr_p4 = 0x4ce20420; |
bbec1a5d | 3701 | static const uint32_t cmpld_7_12_0 = 0x7fac0040; |
9e69ed50 | 3702 | static const uint32_t cmpldi_2_0 = 0x28220000; |
dd93cd0a AM |
3703 | static const uint32_t cror_15_15_15 = 0x4def7b82; |
3704 | static const uint32_t cror_31_31_31 = 0x4ffffb82; | |
f3a0ed29 AM |
3705 | static const uint32_t ld_0_1 = 0xe8010000; |
3706 | static const uint32_t ld_0_12 = 0xe80c0000; | |
dd93cd0a | 3707 | static const uint32_t ld_2_1 = 0xe8410000; |
dd93cd0a | 3708 | static const uint32_t ld_2_2 = 0xe8420000; |
b4f7960d | 3709 | static const uint32_t ld_2_11 = 0xe84b0000; |
549dba71 | 3710 | static const uint32_t ld_2_12 = 0xe84c0000; |
b4f7960d AM |
3711 | static const uint32_t ld_11_2 = 0xe9620000; |
3712 | static const uint32_t ld_11_11 = 0xe96b0000; | |
3713 | static const uint32_t ld_12_2 = 0xe9820000; | |
3714 | static const uint32_t ld_12_11 = 0xe98b0000; | |
9055360d | 3715 | static const uint32_t ld_12_12 = 0xe98c0000; |
f3a0ed29 | 3716 | static const uint32_t lfd_0_1 = 0xc8010000; |
dd93cd0a | 3717 | static const uint32_t li_0_0 = 0x38000000; |
f3a0ed29 | 3718 | static const uint32_t li_12_0 = 0x39800000; |
bbec1a5d | 3719 | static const uint32_t lis_0 = 0x3c000000; |
549dba71 | 3720 | static const uint32_t lis_2 = 0x3c400000; |
c9269dff AM |
3721 | static const uint32_t lis_11 = 0x3d600000; |
3722 | static const uint32_t lis_12 = 0x3d800000; | |
b4f7960d | 3723 | static const uint32_t lvx_0_12_0 = 0x7c0c00ce; |
c9269dff AM |
3724 | static const uint32_t lwz_0_12 = 0x800c0000; |
3725 | static const uint32_t lwz_11_11 = 0x816b0000; | |
3726 | static const uint32_t lwz_11_30 = 0x817e0000; | |
3727 | static const uint32_t lwz_12_12 = 0x818c0000; | |
dd93cd0a | 3728 | static const uint32_t lwzu_0_12 = 0x840c0000; |
c9269dff | 3729 | static const uint32_t mflr_0 = 0x7c0802a6; |
dd93cd0a | 3730 | static const uint32_t mflr_11 = 0x7d6802a6; |
c9269dff AM |
3731 | static const uint32_t mflr_12 = 0x7d8802a6; |
3732 | static const uint32_t mtctr_0 = 0x7c0903a6; | |
3733 | static const uint32_t mtctr_11 = 0x7d6903a6; | |
ec661b9d | 3734 | static const uint32_t mtctr_12 = 0x7d8903a6; |
c9269dff | 3735 | static const uint32_t mtlr_0 = 0x7c0803a6; |
c9269dff | 3736 | static const uint32_t mtlr_12 = 0x7d8803a6; |
dd93cd0a | 3737 | static const uint32_t nop = 0x60000000; |
c9269dff | 3738 | static const uint32_t ori_0_0_0 = 0x60000000; |
b4f7960d | 3739 | static const uint32_t srdi_0_0_2 = 0x7800f082; |
f3a0ed29 AM |
3740 | static const uint32_t std_0_1 = 0xf8010000; |
3741 | static const uint32_t std_0_12 = 0xf80c0000; | |
dd93cd0a | 3742 | static const uint32_t std_2_1 = 0xf8410000; |
f3a0ed29 AM |
3743 | static const uint32_t stfd_0_1 = 0xd8010000; |
3744 | static const uint32_t stvx_0_12_0 = 0x7c0c01ce; | |
dd93cd0a | 3745 | static const uint32_t sub_11_11_12 = 0x7d6c5850; |
b4f7960d AM |
3746 | static const uint32_t sub_12_12_11 = 0x7d8b6050; |
3747 | static const uint32_t xor_2_12_12 = 0x7d826278; | |
3748 | static const uint32_t xor_11_12_12 = 0x7d8b6278; | |
42cacb20 DE |
3749 | |
3750 | // Write out the PLT. | |
3751 | ||
3752 | template<int size, bool big_endian> | |
3753 | void | |
3754 | Output_data_plt_powerpc<size, big_endian>::do_write(Output_file* of) | |
3755 | { | |
b3ccdeb5 | 3756 | if (size == 32 && this->name_[3] != 'I') |
cf43a2fe | 3757 | { |
ec661b9d | 3758 | const section_size_type offset = this->offset(); |
cf43a2fe AM |
3759 | const section_size_type oview_size |
3760 | = convert_to_section_size_type(this->data_size()); | |
3761 | unsigned char* const oview = of->get_output_view(offset, oview_size); | |
3762 | unsigned char* pov = oview; | |
3763 | unsigned char* endpov = oview + oview_size; | |
3764 | ||
e5d5f5ed | 3765 | // The address of the .glink branch table |
cf43a2fe AM |
3766 | const Output_data_glink<size, big_endian>* glink |
3767 | = this->targ_->glink_section(); | |
ec661b9d | 3768 | elfcpp::Elf_types<32>::Elf_Addr branch_tab = glink->address(); |
cf43a2fe AM |
3769 | |
3770 | while (pov < endpov) | |
3771 | { | |
3772 | elfcpp::Swap<32, big_endian>::writeval(pov, branch_tab); | |
3773 | pov += 4; | |
3774 | branch_tab += 4; | |
3775 | } | |
3776 | ||
3777 | of->write_output_view(offset, oview_size, oview); | |
3778 | } | |
3779 | } | |
3780 | ||
3781 | // Create the PLT section. | |
3782 | ||
3783 | template<int size, bool big_endian> | |
3784 | void | |
40b469d7 AM |
3785 | Target_powerpc<size, big_endian>::make_plt_section(Symbol_table* symtab, |
3786 | Layout* layout) | |
cf43a2fe AM |
3787 | { |
3788 | if (this->plt_ == NULL) | |
3789 | { | |
40b469d7 AM |
3790 | if (this->got_ == NULL) |
3791 | this->got_section(symtab, layout); | |
3792 | ||
cf43a2fe AM |
3793 | if (this->glink_ == NULL) |
3794 | make_glink_section(layout); | |
3795 | ||
3796 | // Ensure that .rela.dyn always appears before .rela.plt This is | |
3797 | // necessary due to how, on PowerPC and some other targets, .rela.dyn | |
b3ccdeb5 | 3798 | // needs to include .rela.plt in its range. |
cf43a2fe AM |
3799 | this->rela_dyn_section(layout); |
3800 | ||
e5d5f5ed AM |
3801 | Reloc_section* plt_rel = new Reloc_section(false); |
3802 | layout->add_output_section_data(".rela.plt", elfcpp::SHT_RELA, | |
3803 | elfcpp::SHF_ALLOC, plt_rel, | |
3804 | ORDER_DYNAMIC_PLT_RELOCS, false); | |
3805 | this->plt_ | |
3806 | = new Output_data_plt_powerpc<size, big_endian>(this, plt_rel, | |
e5d5f5ed | 3807 | "** PLT"); |
cf43a2fe AM |
3808 | layout->add_output_section_data(".plt", |
3809 | (size == 32 | |
3810 | ? elfcpp::SHT_PROGBITS | |
3811 | : elfcpp::SHT_NOBITS), | |
3812 | elfcpp::SHF_ALLOC | elfcpp::SHF_WRITE, | |
3813 | this->plt_, | |
3814 | (size == 32 | |
3815 | ? ORDER_SMALL_DATA | |
3816 | : ORDER_SMALL_BSS), | |
3817 | false); | |
3254d32c AM |
3818 | |
3819 | Output_section* rela_plt_os = plt_rel->output_section(); | |
3820 | rela_plt_os->set_info_section(this->plt_->output_section()); | |
cf43a2fe AM |
3821 | } |
3822 | } | |
3823 | ||
e5d5f5ed AM |
3824 | // Create the IPLT section. |
3825 | ||
3826 | template<int size, bool big_endian> | |
3827 | void | |
40b469d7 AM |
3828 | Target_powerpc<size, big_endian>::make_iplt_section(Symbol_table* symtab, |
3829 | Layout* layout) | |
e5d5f5ed AM |
3830 | { |
3831 | if (this->iplt_ == NULL) | |
3832 | { | |
40b469d7 | 3833 | this->make_plt_section(symtab, layout); |
e5d5f5ed AM |
3834 | |
3835 | Reloc_section* iplt_rel = new Reloc_section(false); | |
6528b6eb AM |
3836 | if (this->rela_dyn_->output_section()) |
3837 | this->rela_dyn_->output_section()->add_output_section_data(iplt_rel); | |
e5d5f5ed AM |
3838 | this->iplt_ |
3839 | = new Output_data_plt_powerpc<size, big_endian>(this, iplt_rel, | |
b4f7960d | 3840 | "** IPLT"); |
6528b6eb AM |
3841 | if (this->plt_->output_section()) |
3842 | this->plt_->output_section()->add_output_section_data(this->iplt_); | |
e5d5f5ed AM |
3843 | } |
3844 | } | |
3845 | ||
ec661b9d | 3846 | // A section for huge long branch addresses, similar to plt section. |
cf43a2fe AM |
3847 | |
3848 | template<int size, bool big_endian> | |
ec661b9d | 3849 | class Output_data_brlt_powerpc : public Output_section_data_build |
cf43a2fe AM |
3850 | { |
3851 | public: | |
ec661b9d AM |
3852 | typedef typename elfcpp::Elf_types<size>::Elf_Addr Address; |
3853 | typedef Output_data_reloc<elfcpp::SHT_RELA, true, | |
3854 | size, big_endian> Reloc_section; | |
c9269dff | 3855 | |
ec661b9d AM |
3856 | Output_data_brlt_powerpc(Target_powerpc<size, big_endian>* targ, |
3857 | Reloc_section* brlt_rel) | |
3858 | : Output_section_data_build(size == 32 ? 4 : 8), | |
3859 | rel_(brlt_rel), | |
3860 | targ_(targ) | |
3861 | { } | |
cf43a2fe | 3862 | |
06f30c9d CC |
3863 | void |
3864 | reset_brlt_sizes() | |
3865 | { | |
3866 | this->reset_data_size(); | |
3867 | this->rel_->reset_data_size(); | |
3868 | } | |
3869 | ||
3870 | void | |
3871 | finalize_brlt_sizes() | |
3872 | { | |
3873 | this->finalize_data_size(); | |
3874 | this->rel_->finalize_data_size(); | |
3875 | } | |
3876 | ||
ec661b9d | 3877 | // Add a reloc for an entry in the BRLT. |
cf43a2fe | 3878 | void |
ec661b9d AM |
3879 | add_reloc(Address to, unsigned int off) |
3880 | { this->rel_->add_relative(elfcpp::R_POWERPC_RELATIVE, this, off, to); } | |
e5d5f5ed | 3881 | |
ec661b9d | 3882 | // Update section and reloc section size. |
e5d5f5ed | 3883 | void |
ec661b9d AM |
3884 | set_current_size(unsigned int num_branches) |
3885 | { | |
3886 | this->reset_address_and_file_offset(); | |
3887 | this->set_current_data_size(num_branches * 16); | |
3888 | this->finalize_data_size(); | |
3889 | Output_section* os = this->output_section(); | |
3890 | os->set_section_offsets_need_adjustment(); | |
3891 | if (this->rel_ != NULL) | |
3892 | { | |
0e123f69 | 3893 | const unsigned int reloc_size = elfcpp::Elf_sizes<size>::rela_size; |
ec661b9d AM |
3894 | this->rel_->reset_address_and_file_offset(); |
3895 | this->rel_->set_current_data_size(num_branches * reloc_size); | |
3896 | this->rel_->finalize_data_size(); | |
3897 | Output_section* os = this->rel_->output_section(); | |
3898 | os->set_section_offsets_need_adjustment(); | |
3899 | } | |
3900 | } | |
cf43a2fe | 3901 | |
ec661b9d AM |
3902 | protected: |
3903 | void | |
3904 | do_adjust_output_section(Output_section* os) | |
3905 | { | |
3906 | os->set_entsize(0); | |
3907 | } | |
e5d5f5ed | 3908 | |
ec661b9d AM |
3909 | // Write to a map file. |
3910 | void | |
3911 | do_print_to_mapfile(Mapfile* mapfile) const | |
3912 | { mapfile->print_output_data(this, "** BRLT"); } | |
c9824451 | 3913 | |
ec661b9d AM |
3914 | private: |
3915 | // Write out the BRLT data. | |
3916 | void | |
3917 | do_write(Output_file*); | |
c9824451 | 3918 | |
ec661b9d AM |
3919 | // The reloc section. |
3920 | Reloc_section* rel_; | |
3921 | Target_powerpc<size, big_endian>* targ_; | |
3922 | }; | |
cf43a2fe | 3923 | |
ec661b9d AM |
3924 | // Make the branch lookup table section. |
3925 | ||
3926 | template<int size, bool big_endian> | |
3927 | void | |
3928 | Target_powerpc<size, big_endian>::make_brlt_section(Layout* layout) | |
3929 | { | |
3930 | if (size == 64 && this->brlt_section_ == NULL) | |
3931 | { | |
3932 | Reloc_section* brlt_rel = NULL; | |
3933 | bool is_pic = parameters->options().output_is_position_independent(); | |
3934 | if (is_pic) | |
3935 | { | |
6830ee24 AM |
3936 | // When PIC we can't fill in .branch_lt (like .plt it can be |
3937 | // a bss style section) but must initialise at runtime via | |
6528b6eb | 3938 | // dynamic relocations. |
ec661b9d AM |
3939 | this->rela_dyn_section(layout); |
3940 | brlt_rel = new Reloc_section(false); | |
6528b6eb AM |
3941 | if (this->rela_dyn_->output_section()) |
3942 | this->rela_dyn_->output_section() | |
3943 | ->add_output_section_data(brlt_rel); | |
ec661b9d AM |
3944 | } |
3945 | this->brlt_section_ | |
3946 | = new Output_data_brlt_powerpc<size, big_endian>(this, brlt_rel); | |
6528b6eb | 3947 | if (this->plt_ && is_pic && this->plt_->output_section()) |
ec661b9d AM |
3948 | this->plt_->output_section() |
3949 | ->add_output_section_data(this->brlt_section_); | |
3950 | else | |
6830ee24 | 3951 | layout->add_output_section_data(".branch_lt", |
ec661b9d AM |
3952 | (is_pic ? elfcpp::SHT_NOBITS |
3953 | : elfcpp::SHT_PROGBITS), | |
3954 | elfcpp::SHF_ALLOC | elfcpp::SHF_WRITE, | |
3955 | this->brlt_section_, | |
3956 | (is_pic ? ORDER_SMALL_BSS | |
3957 | : ORDER_SMALL_DATA), | |
3958 | false); | |
3959 | } | |
3960 | } | |
3961 | ||
6830ee24 | 3962 | // Write out .branch_lt when non-PIC. |
ec661b9d AM |
3963 | |
3964 | template<int size, bool big_endian> | |
3965 | void | |
3966 | Output_data_brlt_powerpc<size, big_endian>::do_write(Output_file* of) | |
3967 | { | |
3968 | if (size == 64 && !parameters->options().output_is_position_independent()) | |
3969 | { | |
3970 | const section_size_type offset = this->offset(); | |
3971 | const section_size_type oview_size | |
3972 | = convert_to_section_size_type(this->data_size()); | |
3973 | unsigned char* const oview = of->get_output_view(offset, oview_size); | |
3974 | ||
3975 | this->targ_->write_branch_lookup_table(oview); | |
3976 | of->write_output_view(offset, oview_size, oview); | |
3977 | } | |
3978 | } | |
3979 | ||
9e69ed50 AM |
3980 | static inline uint32_t |
3981 | l(uint32_t a) | |
3982 | { | |
3983 | return a & 0xffff; | |
3984 | } | |
3985 | ||
3986 | static inline uint32_t | |
3987 | hi(uint32_t a) | |
3988 | { | |
3989 | return l(a >> 16); | |
3990 | } | |
3991 | ||
3992 | static inline uint32_t | |
3993 | ha(uint32_t a) | |
3994 | { | |
3995 | return hi(a + 0x8000); | |
3996 | } | |
3997 | ||
9d5781f8 AM |
3998 | template<int size> |
3999 | struct Eh_cie | |
4000 | { | |
4001 | static const unsigned char eh_frame_cie[12]; | |
4002 | }; | |
4003 | ||
4004 | template<int size> | |
4005 | const unsigned char Eh_cie<size>::eh_frame_cie[] = | |
4006 | { | |
4007 | 1, // CIE version. | |
4008 | 'z', 'R', 0, // Augmentation string. | |
4009 | 4, // Code alignment. | |
4010 | 0x80 - size / 8 , // Data alignment. | |
4011 | 65, // RA reg. | |
4012 | 1, // Augmentation size. | |
4013 | (elfcpp::DW_EH_PE_pcrel | |
4014 | | elfcpp::DW_EH_PE_sdata4), // FDE encoding. | |
4015 | elfcpp::DW_CFA_def_cfa, 1, 0 // def_cfa: r1 offset 0. | |
4016 | }; | |
4017 | ||
b4f7960d AM |
4018 | // Describe __glink_PLTresolve use of LR, 64-bit version ABIv1. |
4019 | static const unsigned char glink_eh_frame_fde_64v1[] = | |
9d5781f8 AM |
4020 | { |
4021 | 0, 0, 0, 0, // Replaced with offset to .glink. | |
4022 | 0, 0, 0, 0, // Replaced with size of .glink. | |
4023 | 0, // Augmentation size. | |
4024 | elfcpp::DW_CFA_advance_loc + 1, | |
4025 | elfcpp::DW_CFA_register, 65, 12, | |
15a3a14f | 4026 | elfcpp::DW_CFA_advance_loc + 5, |
9d5781f8 AM |
4027 | elfcpp::DW_CFA_restore_extended, 65 |
4028 | }; | |
4029 | ||
b4f7960d AM |
4030 | // Describe __glink_PLTresolve use of LR, 64-bit version ABIv2. |
4031 | static const unsigned char glink_eh_frame_fde_64v2[] = | |
4032 | { | |
4033 | 0, 0, 0, 0, // Replaced with offset to .glink. | |
4034 | 0, 0, 0, 0, // Replaced with size of .glink. | |
4035 | 0, // Augmentation size. | |
4036 | elfcpp::DW_CFA_advance_loc + 1, | |
4037 | elfcpp::DW_CFA_register, 65, 0, | |
15a3a14f | 4038 | elfcpp::DW_CFA_advance_loc + 7, |
b4f7960d AM |
4039 | elfcpp::DW_CFA_restore_extended, 65 |
4040 | }; | |
4041 | ||
9d5781f8 AM |
4042 | // Describe __glink_PLTresolve use of LR, 32-bit version. |
4043 | static const unsigned char glink_eh_frame_fde_32[] = | |
4044 | { | |
4045 | 0, 0, 0, 0, // Replaced with offset to .glink. | |
4046 | 0, 0, 0, 0, // Replaced with size of .glink. | |
4047 | 0, // Augmentation size. | |
4048 | elfcpp::DW_CFA_advance_loc + 2, | |
4049 | elfcpp::DW_CFA_register, 65, 0, | |
4050 | elfcpp::DW_CFA_advance_loc + 4, | |
4051 | elfcpp::DW_CFA_restore_extended, 65 | |
4052 | }; | |
4053 | ||
4054 | static const unsigned char default_fde[] = | |
4055 | { | |
4056 | 0, 0, 0, 0, // Replaced with offset to stubs. | |
4057 | 0, 0, 0, 0, // Replaced with size of stubs. | |
4058 | 0, // Augmentation size. | |
4059 | elfcpp::DW_CFA_nop, // Pad. | |
4060 | elfcpp::DW_CFA_nop, | |
4061 | elfcpp::DW_CFA_nop | |
4062 | }; | |
4063 | ||
9e69ed50 AM |
4064 | template<bool big_endian> |
4065 | static inline void | |
4066 | write_insn(unsigned char* p, uint32_t v) | |
4067 | { | |
4068 | elfcpp::Swap<32, big_endian>::writeval(p, v); | |
4069 | } | |
4070 | ||
ec661b9d AM |
4071 | // Stub_table holds information about plt and long branch stubs. |
4072 | // Stubs are built in an area following some input section determined | |
4073 | // by group_sections(). This input section is converted to a relaxed | |
4074 | // input section allowing it to be resized to accommodate the stubs | |
4075 | ||
4076 | template<int size, bool big_endian> | |
4077 | class Stub_table : public Output_relaxed_input_section | |
4078 | { | |
4079 | public: | |
7e57d19e AM |
4080 | struct Plt_stub_ent |
4081 | { | |
4082 | Plt_stub_ent(unsigned int off, unsigned int indx) | |
7ee7ff70 | 4083 | : off_(off), indx_(indx), r2save_(0), localentry0_(0) |
7e57d19e AM |
4084 | { } |
4085 | ||
4086 | unsigned int off_; | |
7ee7ff70 | 4087 | unsigned int indx_ : 30; |
7e57d19e | 4088 | unsigned int r2save_ : 1; |
7ee7ff70 | 4089 | unsigned int localentry0_ : 1; |
7e57d19e | 4090 | }; |
ec661b9d AM |
4091 | typedef typename elfcpp::Elf_types<size>::Elf_Addr Address; |
4092 | static const Address invalid_address = static_cast<Address>(0) - 1; | |
4093 | ||
a3e60ddb AM |
4094 | Stub_table(Target_powerpc<size, big_endian>* targ, |
4095 | Output_section* output_section, | |
590b87ff AM |
4096 | const Output_section::Input_section* owner, |
4097 | uint32_t id) | |
a3e60ddb AM |
4098 | : Output_relaxed_input_section(owner->relobj(), owner->shndx(), |
4099 | owner->relobj() | |
4100 | ->section_addralign(owner->shndx())), | |
ec661b9d | 4101 | targ_(targ), plt_call_stubs_(), long_branch_stubs_(), |
a3e60ddb AM |
4102 | orig_data_size_(owner->current_data_size()), |
4103 | plt_size_(0), last_plt_size_(0), | |
6395d38b | 4104 | branch_size_(0), last_branch_size_(0), min_size_threshold_(0), |
590b87ff | 4105 | eh_frame_added_(false), need_save_res_(false), uniq_(id) |
a3e60ddb AM |
4106 | { |
4107 | this->set_output_section(output_section); | |
ec661b9d | 4108 | |
a3e60ddb AM |
4109 | std::vector<Output_relaxed_input_section*> new_relaxed; |
4110 | new_relaxed.push_back(this); | |
4111 | output_section->convert_input_sections_to_relaxed_sections(new_relaxed); | |
4112 | } | |
ec661b9d AM |
4113 | |
4114 | // Add a plt call stub. | |
a3e60ddb AM |
4115 | bool |
4116 | add_plt_call_entry(Address, | |
4117 | const Sized_relobj_file<size, big_endian>*, | |
ec661b9d AM |
4118 | const Symbol*, |
4119 | unsigned int, | |
7e57d19e AM |
4120 | Address, |
4121 | bool); | |
ec661b9d | 4122 | |
a3e60ddb AM |
4123 | bool |
4124 | add_plt_call_entry(Address, | |
4125 | const Sized_relobj_file<size, big_endian>*, | |
ec661b9d AM |
4126 | unsigned int, |
4127 | unsigned int, | |
7e57d19e AM |
4128 | Address, |
4129 | bool); | |
ec661b9d AM |
4130 | |
4131 | // Find a given plt call stub. | |
7e57d19e | 4132 | const Plt_stub_ent* |
ec661b9d AM |
4133 | find_plt_call_entry(const Symbol*) const; |
4134 | ||
7e57d19e | 4135 | const Plt_stub_ent* |
ec661b9d AM |
4136 | find_plt_call_entry(const Sized_relobj_file<size, big_endian>*, |
4137 | unsigned int) const; | |
4138 | ||
7e57d19e | 4139 | const Plt_stub_ent* |
ec661b9d AM |
4140 | find_plt_call_entry(const Sized_relobj_file<size, big_endian>*, |
4141 | const Symbol*, | |
4142 | unsigned int, | |
4143 | Address) const; | |
4144 | ||
7e57d19e | 4145 | const Plt_stub_ent* |
ec661b9d AM |
4146 | find_plt_call_entry(const Sized_relobj_file<size, big_endian>*, |
4147 | unsigned int, | |
4148 | unsigned int, | |
4149 | Address) const; | |
4150 | ||
4151 | // Add a long branch stub. | |
a3e60ddb AM |
4152 | bool |
4153 | add_long_branch_entry(const Powerpc_relobj<size, big_endian>*, | |
d49044c7 | 4154 | unsigned int, Address, Address, bool); |
ec661b9d AM |
4155 | |
4156 | Address | |
9d5781f8 AM |
4157 | find_long_branch_entry(const Powerpc_relobj<size, big_endian>*, |
4158 | Address) const; | |
ec661b9d | 4159 | |
a3e60ddb AM |
4160 | bool |
4161 | can_reach_stub(Address from, unsigned int off, unsigned int r_type) | |
4162 | { | |
cbcb23fa | 4163 | Address max_branch_offset = max_branch_delta(r_type); |
a3e60ddb AM |
4164 | if (max_branch_offset == 0) |
4165 | return true; | |
4166 | gold_assert(from != invalid_address); | |
4167 | Address loc = off + this->stub_address(); | |
4168 | return loc - from + max_branch_offset < 2 * max_branch_offset; | |
4169 | } | |
4170 | ||
ec661b9d | 4171 | void |
a3e60ddb | 4172 | clear_stubs(bool all) |
cf43a2fe | 4173 | { |
9e69ed50 AM |
4174 | this->plt_call_stubs_.clear(); |
4175 | this->plt_size_ = 0; | |
ec661b9d AM |
4176 | this->long_branch_stubs_.clear(); |
4177 | this->branch_size_ = 0; | |
d49044c7 | 4178 | this->need_save_res_ = false; |
a3e60ddb AM |
4179 | if (all) |
4180 | { | |
4181 | this->last_plt_size_ = 0; | |
4182 | this->last_branch_size_ = 0; | |
4183 | } | |
cf43a2fe AM |
4184 | } |
4185 | ||
ec661b9d AM |
4186 | Address |
4187 | set_address_and_size(const Output_section* os, Address off) | |
cf43a2fe | 4188 | { |
ec661b9d AM |
4189 | Address start_off = off; |
4190 | off += this->orig_data_size_; | |
4191 | Address my_size = this->plt_size_ + this->branch_size_; | |
d49044c7 AM |
4192 | if (this->need_save_res_) |
4193 | my_size += this->targ_->savres_section()->data_size(); | |
ec661b9d AM |
4194 | if (my_size != 0) |
4195 | off = align_address(off, this->stub_align()); | |
4196 | // Include original section size and alignment padding in size | |
4197 | my_size += off - start_off; | |
6395d38b HS |
4198 | // Ensure new size is always larger than min size |
4199 | // threshold. Alignment requirement is included in "my_size", so | |
4200 | // increase "my_size" does not invalidate alignment. | |
4201 | if (my_size < this->min_size_threshold_) | |
4202 | my_size = this->min_size_threshold_; | |
ec661b9d AM |
4203 | this->reset_address_and_file_offset(); |
4204 | this->set_current_data_size(my_size); | |
4205 | this->set_address_and_file_offset(os->address() + start_off, | |
4206 | os->offset() + start_off); | |
4207 | return my_size; | |
cf43a2fe AM |
4208 | } |
4209 | ||
ec661b9d | 4210 | Address |
9d5781f8 | 4211 | stub_address() const |
ec661b9d AM |
4212 | { |
4213 | return align_address(this->address() + this->orig_data_size_, | |
4214 | this->stub_align()); | |
4215 | } | |
4216 | ||
4217 | Address | |
9d5781f8 | 4218 | stub_offset() const |
ec661b9d AM |
4219 | { |
4220 | return align_address(this->offset() + this->orig_data_size_, | |
4221 | this->stub_align()); | |
4222 | } | |
4223 | ||
4224 | section_size_type | |
4225 | plt_size() const | |
4226 | { return this->plt_size_; } | |
4227 | ||
590b87ff AM |
4228 | void |
4229 | set_min_size_threshold(Address min_size) | |
6395d38b HS |
4230 | { this->min_size_threshold_ = min_size; } |
4231 | ||
590b87ff AM |
4232 | void |
4233 | define_stub_syms(Symbol_table*); | |
4234 | ||
ec661b9d AM |
4235 | bool |
4236 | size_update() | |
4237 | { | |
4238 | Output_section* os = this->output_section(); | |
4239 | if (os->addralign() < this->stub_align()) | |
4240 | { | |
4241 | os->set_addralign(this->stub_align()); | |
4242 | // FIXME: get rid of the insane checkpointing. | |
4243 | // We can't increase alignment of the input section to which | |
4244 | // stubs are attached; The input section may be .init which | |
4245 | // is pasted together with other .init sections to form a | |
4246 | // function. Aligning might insert zero padding resulting in | |
4247 | // sigill. However we do need to increase alignment of the | |
4248 | // output section so that the align_address() on offset in | |
4249 | // set_address_and_size() adds the same padding as the | |
4250 | // align_address() on address in stub_address(). | |
4251 | // What's more, we need this alignment for the layout done in | |
4252 | // relaxation_loop_body() so that the output section starts at | |
4253 | // a suitably aligned address. | |
4254 | os->checkpoint_set_addralign(this->stub_align()); | |
4255 | } | |
9e69ed50 AM |
4256 | if (this->last_plt_size_ != this->plt_size_ |
4257 | || this->last_branch_size_ != this->branch_size_) | |
ec661b9d | 4258 | { |
9e69ed50 AM |
4259 | this->last_plt_size_ = this->plt_size_; |
4260 | this->last_branch_size_ = this->branch_size_; | |
ec661b9d AM |
4261 | return true; |
4262 | } | |
4263 | return false; | |
4264 | } | |
4265 | ||
9d5781f8 AM |
4266 | // Add .eh_frame info for this stub section. Unlike other linker |
4267 | // generated .eh_frame this is added late in the link, because we | |
4268 | // only want the .eh_frame info if this particular stub section is | |
4269 | // non-empty. | |
4270 | void | |
4271 | add_eh_frame(Layout* layout) | |
4272 | { | |
be897fb7 AM |
4273 | if (!parameters->options().ld_generated_unwind_info()) |
4274 | return; | |
4275 | ||
4276 | // Since we add stub .eh_frame info late, it must be placed | |
4277 | // after all other linker generated .eh_frame info so that | |
4278 | // merge mapping need not be updated for input sections. | |
4279 | // There is no provision to use a different CIE to that used | |
4280 | // by .glink. | |
4281 | if (!this->targ_->has_glink()) | |
4282 | return; | |
4283 | ||
4284 | if (this->plt_size_ + this->branch_size_ + this->need_save_res_ == 0) | |
4285 | return; | |
4286 | ||
4287 | layout->add_eh_frame_for_plt(this, | |
4288 | Eh_cie<size>::eh_frame_cie, | |
4289 | sizeof (Eh_cie<size>::eh_frame_cie), | |
4290 | default_fde, | |
4291 | sizeof (default_fde)); | |
4292 | this->eh_frame_added_ = true; | |
4293 | } | |
4294 | ||
4295 | void | |
4296 | remove_eh_frame(Layout* layout) | |
4297 | { | |
4298 | if (this->eh_frame_added_) | |
9d5781f8 | 4299 | { |
be897fb7 AM |
4300 | layout->remove_eh_frame_for_plt(this, |
4301 | Eh_cie<size>::eh_frame_cie, | |
4302 | sizeof (Eh_cie<size>::eh_frame_cie), | |
4303 | default_fde, | |
4304 | sizeof (default_fde)); | |
4305 | this->eh_frame_added_ = false; | |
9d5781f8 AM |
4306 | } |
4307 | } | |
4308 | ||
ec661b9d AM |
4309 | Target_powerpc<size, big_endian>* |
4310 | targ() const | |
4311 | { return targ_; } | |
6ce78956 | 4312 | |
cf43a2fe | 4313 | private: |
bdab445c AM |
4314 | class Plt_stub_key; |
4315 | class Plt_stub_key_hash; | |
bdab445c AM |
4316 | typedef Unordered_map<Plt_stub_key, Plt_stub_ent, |
4317 | Plt_stub_key_hash> Plt_stub_entries; | |
590b87ff AM |
4318 | class Branch_stub_ent; |
4319 | class Branch_stub_ent_hash; | |
4320 | typedef Unordered_map<Branch_stub_ent, unsigned int, | |
4321 | Branch_stub_ent_hash> Branch_stub_entries; | |
9e69ed50 AM |
4322 | |
4323 | // Alignment of stub section. | |
ec661b9d | 4324 | unsigned int |
9e69ed50 AM |
4325 | stub_align() const |
4326 | { | |
4327 | if (size == 32) | |
4328 | return 16; | |
4329 | unsigned int min_align = 32; | |
4330 | unsigned int user_align = 1 << parameters->options().plt_align(); | |
4331 | return std::max(user_align, min_align); | |
4332 | } | |
cf43a2fe | 4333 | |
91c2b899 AM |
4334 | // Return the plt offset for the given call stub. |
4335 | Address | |
4336 | plt_off(typename Plt_stub_entries::const_iterator p, bool* is_iplt) const | |
4337 | { | |
4338 | const Symbol* gsym = p->first.sym_; | |
4339 | if (gsym != NULL) | |
4340 | { | |
4341 | *is_iplt = (gsym->type() == elfcpp::STT_GNU_IFUNC | |
4342 | && gsym->can_use_relative_reloc(false)); | |
4343 | return gsym->plt_offset(); | |
4344 | } | |
4345 | else | |
4346 | { | |
4347 | *is_iplt = true; | |
4348 | const Sized_relobj_file<size, big_endian>* relobj = p->first.object_; | |
4349 | unsigned int local_sym_index = p->first.locsym_; | |
4350 | return relobj->local_plt_offset(local_sym_index); | |
4351 | } | |
4352 | } | |
4353 | ||
9e69ed50 | 4354 | // Size of a given plt call stub. |
ec661b9d | 4355 | unsigned int |
9e69ed50 AM |
4356 | plt_call_size(typename Plt_stub_entries::const_iterator p) const |
4357 | { | |
4358 | if (size == 32) | |
4359 | return 16; | |
4360 | ||
91c2b899 AM |
4361 | bool is_iplt; |
4362 | Address plt_addr = this->plt_off(p, &is_iplt); | |
4363 | if (is_iplt) | |
4364 | plt_addr += this->targ_->iplt_section()->address(); | |
9e69ed50 | 4365 | else |
91c2b899 AM |
4366 | plt_addr += this->targ_->plt_section()->address(); |
4367 | Address got_addr = this->targ_->got_section()->output_section()->address(); | |
9e69ed50 AM |
4368 | const Powerpc_relobj<size, big_endian>* ppcobj = static_cast |
4369 | <const Powerpc_relobj<size, big_endian>*>(p->first.object_); | |
91c2b899 AM |
4370 | got_addr += ppcobj->toc_base_offset(); |
4371 | Address off = plt_addr - got_addr; | |
b4f7960d AM |
4372 | unsigned int bytes = 4 * 4 + 4 * (ha(off) != 0); |
4373 | if (this->targ_->abiversion() < 2) | |
4374 | { | |
4375 | bool static_chain = parameters->options().plt_static_chain(); | |
4376 | bool thread_safe = this->targ_->plt_thread_safe(); | |
4377 | bytes += (4 | |
4378 | + 4 * static_chain | |
4379 | + 8 * thread_safe | |
4380 | + 4 * (ha(off + 8 + 8 * static_chain) != ha(off))); | |
4381 | } | |
9e69ed50 AM |
4382 | unsigned int align = 1 << parameters->options().plt_align(); |
4383 | if (align > 1) | |
4384 | bytes = (bytes + align - 1) & -align; | |
4385 | return bytes; | |
4386 | } | |
ec661b9d AM |
4387 | |
4388 | // Return long branch stub size. | |
4389 | unsigned int | |
590b87ff | 4390 | branch_stub_size(typename Branch_stub_entries::const_iterator p) |
ec661b9d | 4391 | { |
590b87ff AM |
4392 | Address loc = this->stub_address() + this->last_plt_size_ + p->second; |
4393 | if (p->first.dest_ - loc + (1 << 25) < 2 << 25) | |
ec661b9d AM |
4394 | return 4; |
4395 | if (size == 64 || !parameters->options().output_is_position_independent()) | |
4396 | return 16; | |
4397 | return 32; | |
4398 | } | |
4399 | ||
4400 | // Write out stubs. | |
cf43a2fe AM |
4401 | void |
4402 | do_write(Output_file*); | |
4403 | ||
ec661b9d | 4404 | // Plt call stub keys. |
bdab445c | 4405 | class Plt_stub_key |
cf43a2fe | 4406 | { |
d1a8cabd | 4407 | public: |
bdab445c | 4408 | Plt_stub_key(const Symbol* sym) |
c9824451 AM |
4409 | : sym_(sym), object_(0), addend_(0), locsym_(0) |
4410 | { } | |
4411 | ||
bdab445c | 4412 | Plt_stub_key(const Sized_relobj_file<size, big_endian>* object, |
ec661b9d | 4413 | unsigned int locsym_index) |
c9824451 AM |
4414 | : sym_(NULL), object_(object), addend_(0), locsym_(locsym_index) |
4415 | { } | |
4416 | ||
bdab445c | 4417 | Plt_stub_key(const Sized_relobj_file<size, big_endian>* object, |
ec661b9d AM |
4418 | const Symbol* sym, |
4419 | unsigned int r_type, | |
4420 | Address addend) | |
e5d5f5ed | 4421 | : sym_(sym), object_(0), addend_(0), locsym_(0) |
cf43a2fe AM |
4422 | { |
4423 | if (size != 32) | |
ec661b9d | 4424 | this->addend_ = addend; |
d1a8cabd | 4425 | else if (parameters->options().output_is_position_independent() |
ec661b9d | 4426 | && r_type == elfcpp::R_PPC_PLTREL24) |
cf43a2fe | 4427 | { |
ec661b9d | 4428 | this->addend_ = addend; |
e5d5f5ed | 4429 | if (this->addend_ >= 32768) |
d1a8cabd | 4430 | this->object_ = object; |
cf43a2fe AM |
4431 | } |
4432 | } | |
4433 | ||
bdab445c | 4434 | Plt_stub_key(const Sized_relobj_file<size, big_endian>* object, |
ec661b9d AM |
4435 | unsigned int locsym_index, |
4436 | unsigned int r_type, | |
4437 | Address addend) | |
e5d5f5ed AM |
4438 | : sym_(NULL), object_(object), addend_(0), locsym_(locsym_index) |
4439 | { | |
4440 | if (size != 32) | |
ec661b9d | 4441 | this->addend_ = addend; |
e5d5f5ed | 4442 | else if (parameters->options().output_is_position_independent() |
ec661b9d AM |
4443 | && r_type == elfcpp::R_PPC_PLTREL24) |
4444 | this->addend_ = addend; | |
e5d5f5ed AM |
4445 | } |
4446 | ||
bdab445c | 4447 | bool operator==(const Plt_stub_key& that) const |
cf43a2fe AM |
4448 | { |
4449 | return (this->sym_ == that.sym_ | |
4450 | && this->object_ == that.object_ | |
e5d5f5ed AM |
4451 | && this->addend_ == that.addend_ |
4452 | && this->locsym_ == that.locsym_); | |
cf43a2fe | 4453 | } |
c9269dff AM |
4454 | |
4455 | const Symbol* sym_; | |
e5d5f5ed AM |
4456 | const Sized_relobj_file<size, big_endian>* object_; |
4457 | typename elfcpp::Elf_types<size>::Elf_Addr addend_; | |
4458 | unsigned int locsym_; | |
cf43a2fe AM |
4459 | }; |
4460 | ||
bdab445c | 4461 | class Plt_stub_key_hash |
cf43a2fe | 4462 | { |
d1a8cabd | 4463 | public: |
bdab445c | 4464 | size_t operator()(const Plt_stub_key& ent) const |
cf43a2fe AM |
4465 | { |
4466 | return (reinterpret_cast<uintptr_t>(ent.sym_) | |
4467 | ^ reinterpret_cast<uintptr_t>(ent.object_) | |
e5d5f5ed AM |
4468 | ^ ent.addend_ |
4469 | ^ ent.locsym_); | |
cf43a2fe | 4470 | } |
ec661b9d AM |
4471 | }; |
4472 | ||
4473 | // Long branch stub keys. | |
4474 | class Branch_stub_ent | |
4475 | { | |
4476 | public: | |
d49044c7 AM |
4477 | Branch_stub_ent(const Powerpc_relobj<size, big_endian>* obj, |
4478 | Address to, bool save_res) | |
4479 | : dest_(to), toc_base_off_(0), save_res_(save_res) | |
ec661b9d AM |
4480 | { |
4481 | if (size == 64) | |
4482 | toc_base_off_ = obj->toc_base_offset(); | |
4483 | } | |
4484 | ||
4485 | bool operator==(const Branch_stub_ent& that) const | |
4486 | { | |
4487 | return (this->dest_ == that.dest_ | |
4488 | && (size == 32 | |
4489 | || this->toc_base_off_ == that.toc_base_off_)); | |
4490 | } | |
cf43a2fe | 4491 | |
ec661b9d AM |
4492 | Address dest_; |
4493 | unsigned int toc_base_off_; | |
d49044c7 | 4494 | bool save_res_; |
ec661b9d | 4495 | }; |
cf43a2fe | 4496 | |
ec661b9d AM |
4497 | class Branch_stub_ent_hash |
4498 | { | |
4499 | public: | |
4500 | size_t operator()(const Branch_stub_ent& ent) const | |
4501 | { return ent.dest_ ^ ent.toc_base_off_; } | |
4502 | }; | |
cf43a2fe | 4503 | |
ec661b9d | 4504 | // In a sane world this would be a global. |
cf43a2fe | 4505 | Target_powerpc<size, big_endian>* targ_; |
ec661b9d | 4506 | // Map sym/object/addend to stub offset. |
ec661b9d AM |
4507 | Plt_stub_entries plt_call_stubs_; |
4508 | // Map destination address to stub offset. | |
ec661b9d AM |
4509 | Branch_stub_entries long_branch_stubs_; |
4510 | // size of input section | |
4511 | section_size_type orig_data_size_; | |
4512 | // size of stubs | |
9e69ed50 | 4513 | section_size_type plt_size_, last_plt_size_, branch_size_, last_branch_size_; |
6395d38b HS |
4514 | // Some rare cases cause (PR/20529) fluctuation in stub table |
4515 | // size, which leads to an endless relax loop. This is to be fixed | |
4516 | // by, after the first few iterations, allowing only increase of | |
4517 | // stub table size. This variable sets the minimal possible size of | |
4518 | // a stub table, it is zero for the first few iterations, then | |
4519 | // increases monotonically. | |
4520 | Address min_size_threshold_; | |
9d5781f8 AM |
4521 | // Whether .eh_frame info has been created for this stub section. |
4522 | bool eh_frame_added_; | |
d49044c7 AM |
4523 | // Set if this stub group needs a copy of out-of-line register |
4524 | // save/restore functions. | |
4525 | bool need_save_res_; | |
590b87ff AM |
4526 | // Per stub table unique identifier. |
4527 | uint32_t uniq_; | |
cf43a2fe AM |
4528 | }; |
4529 | ||
ec661b9d | 4530 | // Add a plt call stub, if we do not already have one for this |
d1a8cabd | 4531 | // sym/object/addend combo. |
cf43a2fe AM |
4532 | |
4533 | template<int size, bool big_endian> | |
a3e60ddb | 4534 | bool |
ec661b9d | 4535 | Stub_table<size, big_endian>::add_plt_call_entry( |
a3e60ddb | 4536 | Address from, |
c9824451 | 4537 | const Sized_relobj_file<size, big_endian>* object, |
d83ce4e3 | 4538 | const Symbol* gsym, |
ec661b9d | 4539 | unsigned int r_type, |
7e57d19e AM |
4540 | Address addend, |
4541 | bool tocsave) | |
cf43a2fe | 4542 | { |
bdab445c AM |
4543 | Plt_stub_key key(object, gsym, r_type, addend); |
4544 | Plt_stub_ent ent(this->plt_size_, this->plt_call_stubs_.size()); | |
9e69ed50 | 4545 | std::pair<typename Plt_stub_entries::iterator, bool> p |
bdab445c | 4546 | = this->plt_call_stubs_.insert(std::make_pair(key, ent)); |
9e69ed50 | 4547 | if (p.second) |
7ee7ff70 AM |
4548 | { |
4549 | this->plt_size_ = ent.off_ + this->plt_call_size(p.first); | |
4550 | if (size == 64 | |
4551 | && this->targ_->is_elfv2_localentry0(gsym)) | |
4552 | { | |
4553 | p.first->second.localentry0_ = 1; | |
4554 | this->targ_->set_has_localentry0(); | |
4555 | } | |
4556 | } | |
4557 | if (size == 64 | |
4558 | && !tocsave | |
4559 | && !p.first->second.localentry0_) | |
7e57d19e | 4560 | p.first->second.r2save_ = 1; |
bdab445c | 4561 | return this->can_reach_stub(from, ent.off_, r_type); |
cf43a2fe AM |
4562 | } |
4563 | ||
e5d5f5ed | 4564 | template<int size, bool big_endian> |
a3e60ddb | 4565 | bool |
ec661b9d | 4566 | Stub_table<size, big_endian>::add_plt_call_entry( |
a3e60ddb | 4567 | Address from, |
c9824451 | 4568 | const Sized_relobj_file<size, big_endian>* object, |
e5d5f5ed | 4569 | unsigned int locsym_index, |
ec661b9d | 4570 | unsigned int r_type, |
7e57d19e AM |
4571 | Address addend, |
4572 | bool tocsave) | |
e5d5f5ed | 4573 | { |
bdab445c AM |
4574 | Plt_stub_key key(object, locsym_index, r_type, addend); |
4575 | Plt_stub_ent ent(this->plt_size_, this->plt_call_stubs_.size()); | |
9e69ed50 | 4576 | std::pair<typename Plt_stub_entries::iterator, bool> p |
bdab445c | 4577 | = this->plt_call_stubs_.insert(std::make_pair(key, ent)); |
9e69ed50 | 4578 | if (p.second) |
7ee7ff70 AM |
4579 | { |
4580 | this->plt_size_ = ent.off_ + this->plt_call_size(p.first); | |
4581 | if (size == 64 | |
4582 | && this->targ_->is_elfv2_localentry0(object, locsym_index)) | |
4583 | { | |
4584 | p.first->second.localentry0_ = 1; | |
4585 | this->targ_->set_has_localentry0(); | |
4586 | } | |
4587 | } | |
4588 | if (size == 64 | |
4589 | && !tocsave | |
4590 | && !p.first->second.localentry0_) | |
7e57d19e | 4591 | p.first->second.r2save_ = 1; |
bdab445c | 4592 | return this->can_reach_stub(from, ent.off_, r_type); |
e5d5f5ed AM |
4593 | } |
4594 | ||
ec661b9d AM |
4595 | // Find a plt call stub. |
4596 | ||
cf43a2fe | 4597 | template<int size, bool big_endian> |
7e57d19e | 4598 | const typename Stub_table<size, big_endian>::Plt_stub_ent* |
ec661b9d | 4599 | Stub_table<size, big_endian>::find_plt_call_entry( |
c9824451 | 4600 | const Sized_relobj_file<size, big_endian>* object, |
d83ce4e3 | 4601 | const Symbol* gsym, |
ec661b9d AM |
4602 | unsigned int r_type, |
4603 | Address addend) const | |
c9824451 | 4604 | { |
bdab445c AM |
4605 | Plt_stub_key key(object, gsym, r_type, addend); |
4606 | typename Plt_stub_entries::const_iterator p = this->plt_call_stubs_.find(key); | |
4607 | if (p == this->plt_call_stubs_.end()) | |
7e57d19e AM |
4608 | return NULL; |
4609 | return &p->second; | |
c9824451 AM |
4610 | } |
4611 | ||
4612 | template<int size, bool big_endian> | |
7e57d19e | 4613 | const typename Stub_table<size, big_endian>::Plt_stub_ent* |
ec661b9d | 4614 | Stub_table<size, big_endian>::find_plt_call_entry(const Symbol* gsym) const |
cf43a2fe | 4615 | { |
bdab445c AM |
4616 | Plt_stub_key key(gsym); |
4617 | typename Plt_stub_entries::const_iterator p = this->plt_call_stubs_.find(key); | |
7e57d19e AM |
4618 | if (p == this->plt_call_stubs_.end()) |
4619 | return NULL; | |
4620 | return &p->second; | |
cf43a2fe AM |
4621 | } |
4622 | ||
e5d5f5ed | 4623 | template<int size, bool big_endian> |
7e57d19e | 4624 | const typename Stub_table<size, big_endian>::Plt_stub_ent* |
ec661b9d | 4625 | Stub_table<size, big_endian>::find_plt_call_entry( |
c9824451 | 4626 | const Sized_relobj_file<size, big_endian>* object, |
e5d5f5ed | 4627 | unsigned int locsym_index, |
ec661b9d AM |
4628 | unsigned int r_type, |
4629 | Address addend) const | |
e5d5f5ed | 4630 | { |
bdab445c AM |
4631 | Plt_stub_key key(object, locsym_index, r_type, addend); |
4632 | typename Plt_stub_entries::const_iterator p = this->plt_call_stubs_.find(key); | |
4633 | if (p == this->plt_call_stubs_.end()) | |
7e57d19e AM |
4634 | return NULL; |
4635 | return &p->second; | |
c9824451 AM |
4636 | } |
4637 | ||
4638 | template<int size, bool big_endian> | |
7e57d19e | 4639 | const typename Stub_table<size, big_endian>::Plt_stub_ent* |
ec661b9d | 4640 | Stub_table<size, big_endian>::find_plt_call_entry( |
c9824451 AM |
4641 | const Sized_relobj_file<size, big_endian>* object, |
4642 | unsigned int locsym_index) const | |
4643 | { | |
bdab445c AM |
4644 | Plt_stub_key key(object, locsym_index); |
4645 | typename Plt_stub_entries::const_iterator p = this->plt_call_stubs_.find(key); | |
7e57d19e AM |
4646 | if (p == this->plt_call_stubs_.end()) |
4647 | return NULL; | |
4648 | return &p->second; | |
ec661b9d AM |
4649 | } |
4650 | ||
4651 | // Add a long branch stub if we don't already have one to given | |
4652 | // destination. | |
4653 | ||
4654 | template<int size, bool big_endian> | |
a3e60ddb | 4655 | bool |
ec661b9d AM |
4656 | Stub_table<size, big_endian>::add_long_branch_entry( |
4657 | const Powerpc_relobj<size, big_endian>* object, | |
a3e60ddb AM |
4658 | unsigned int r_type, |
4659 | Address from, | |
d49044c7 AM |
4660 | Address to, |
4661 | bool save_res) | |
ec661b9d | 4662 | { |
d49044c7 | 4663 | Branch_stub_ent ent(object, to, save_res); |
ec661b9d | 4664 | Address off = this->branch_size_; |
590b87ff AM |
4665 | std::pair<typename Branch_stub_entries::iterator, bool> p |
4666 | = this->long_branch_stubs_.insert(std::make_pair(ent, off)); | |
4667 | if (p.second) | |
ec661b9d | 4668 | { |
d49044c7 AM |
4669 | if (save_res) |
4670 | this->need_save_res_ = true; | |
4671 | else | |
4672 | { | |
590b87ff | 4673 | unsigned int stub_size = this->branch_stub_size(p.first); |
d49044c7 AM |
4674 | this->branch_size_ = off + stub_size; |
4675 | if (size == 64 && stub_size != 4) | |
4676 | this->targ_->add_branch_lookup_table(to); | |
4677 | } | |
ec661b9d | 4678 | } |
a3e60ddb | 4679 | return this->can_reach_stub(from, off, r_type); |
ec661b9d AM |
4680 | } |
4681 | ||
d49044c7 | 4682 | // Find long branch stub offset. |
ec661b9d AM |
4683 | |
4684 | template<int size, bool big_endian> | |
ec5b8187 | 4685 | typename Stub_table<size, big_endian>::Address |
ec661b9d AM |
4686 | Stub_table<size, big_endian>::find_long_branch_entry( |
4687 | const Powerpc_relobj<size, big_endian>* object, | |
9d5781f8 | 4688 | Address to) const |
ec661b9d | 4689 | { |
d49044c7 | 4690 | Branch_stub_ent ent(object, to, false); |
ec661b9d AM |
4691 | typename Branch_stub_entries::const_iterator p |
4692 | = this->long_branch_stubs_.find(ent); | |
d49044c7 AM |
4693 | if (p == this->long_branch_stubs_.end()) |
4694 | return invalid_address; | |
4695 | if (p->first.save_res_) | |
4696 | return to - this->targ_->savres_section()->address() + this->branch_size_; | |
4697 | return p->second; | |
e5d5f5ed AM |
4698 | } |
4699 | ||
ec661b9d AM |
4700 | // A class to handle .glink. |
4701 | ||
4702 | template<int size, bool big_endian> | |
4703 | class Output_data_glink : public Output_section_data | |
4704 | { | |
4705 | public: | |
9055360d AM |
4706 | typedef typename elfcpp::Elf_types<size>::Elf_Addr Address; |
4707 | static const Address invalid_address = static_cast<Address>(0) - 1; | |
ec661b9d AM |
4708 | static const int pltresolve_size = 16*4; |
4709 | ||
4710 | Output_data_glink(Target_powerpc<size, big_endian>* targ) | |
9055360d AM |
4711 | : Output_section_data(16), targ_(targ), global_entry_stubs_(), |
4712 | end_branch_table_(), ge_size_(0) | |
ec661b9d AM |
4713 | { } |
4714 | ||
9d5781f8 | 4715 | void |
9055360d | 4716 | add_eh_frame(Layout* layout); |
9d5781f8 | 4717 | |
9055360d AM |
4718 | void |
4719 | add_global_entry(const Symbol*); | |
4720 | ||
4721 | Address | |
4722 | find_global_entry(const Symbol*) const; | |
4723 | ||
4724 | Address | |
4725 | global_entry_address() const | |
4726 | { | |
4727 | gold_assert(this->is_data_size_valid()); | |
4728 | unsigned int global_entry_off = (this->end_branch_table_ + 15) & -16; | |
4729 | return this->address() + global_entry_off; | |
9d5781f8 AM |
4730 | } |
4731 | ||
ec661b9d AM |
4732 | protected: |
4733 | // Write to a map file. | |
4734 | void | |
4735 | do_print_to_mapfile(Mapfile* mapfile) const | |
4736 | { mapfile->print_output_data(this, _("** glink")); } | |
4737 | ||
4738 | private: | |
4739 | void | |
4740 | set_final_data_size(); | |
4741 | ||
4742 | // Write out .glink | |
4743 | void | |
4744 | do_write(Output_file*); | |
4745 | ||
4746 | // Allows access to .got and .plt for do_write. | |
4747 | Target_powerpc<size, big_endian>* targ_; | |
9055360d AM |
4748 | |
4749 | // Map sym to stub offset. | |
4750 | typedef Unordered_map<const Symbol*, unsigned int> Global_entry_stub_entries; | |
4751 | Global_entry_stub_entries global_entry_stubs_; | |
4752 | ||
4753 | unsigned int end_branch_table_, ge_size_; | |
ec661b9d AM |
4754 | }; |
4755 | ||
9055360d AM |
4756 | template<int size, bool big_endian> |
4757 | void | |
4758 | Output_data_glink<size, big_endian>::add_eh_frame(Layout* layout) | |
4759 | { | |
4760 | if (!parameters->options().ld_generated_unwind_info()) | |
4761 | return; | |
4762 | ||
4763 | if (size == 64) | |
4764 | { | |
4765 | if (this->targ_->abiversion() < 2) | |
4766 | layout->add_eh_frame_for_plt(this, | |
4767 | Eh_cie<64>::eh_frame_cie, | |
4768 | sizeof (Eh_cie<64>::eh_frame_cie), | |
4769 | glink_eh_frame_fde_64v1, | |
4770 | sizeof (glink_eh_frame_fde_64v1)); | |
4771 | else | |
4772 | layout->add_eh_frame_for_plt(this, | |
4773 | Eh_cie<64>::eh_frame_cie, | |
4774 | sizeof (Eh_cie<64>::eh_frame_cie), | |
4775 | glink_eh_frame_fde_64v2, | |
4776 | sizeof (glink_eh_frame_fde_64v2)); | |
4777 | } | |
4778 | else | |
4779 | { | |
4780 | // 32-bit .glink can use the default since the CIE return | |
4781 | // address reg, LR, is valid. | |
4782 | layout->add_eh_frame_for_plt(this, | |
4783 | Eh_cie<32>::eh_frame_cie, | |
4784 | sizeof (Eh_cie<32>::eh_frame_cie), | |
4785 | default_fde, | |
4786 | sizeof (default_fde)); | |
4787 | // Except where LR is used in a PIC __glink_PLTresolve. | |
4788 | if (parameters->options().output_is_position_independent()) | |
4789 | layout->add_eh_frame_for_plt(this, | |
4790 | Eh_cie<32>::eh_frame_cie, | |
4791 | sizeof (Eh_cie<32>::eh_frame_cie), | |
4792 | glink_eh_frame_fde_32, | |
4793 | sizeof (glink_eh_frame_fde_32)); | |
4794 | } | |
4795 | } | |
4796 | ||
4797 | template<int size, bool big_endian> | |
4798 | void | |
4799 | Output_data_glink<size, big_endian>::add_global_entry(const Symbol* gsym) | |
4800 | { | |
4801 | std::pair<typename Global_entry_stub_entries::iterator, bool> p | |
4802 | = this->global_entry_stubs_.insert(std::make_pair(gsym, this->ge_size_)); | |
4803 | if (p.second) | |
4804 | this->ge_size_ += 16; | |
4805 | } | |
4806 | ||
4807 | template<int size, bool big_endian> | |
4808 | typename Output_data_glink<size, big_endian>::Address | |
4809 | Output_data_glink<size, big_endian>::find_global_entry(const Symbol* gsym) const | |
4810 | { | |
4811 | typename Global_entry_stub_entries::const_iterator p | |
4812 | = this->global_entry_stubs_.find(gsym); | |
4813 | return p == this->global_entry_stubs_.end() ? invalid_address : p->second; | |
4814 | } | |
4815 | ||
cf43a2fe AM |
4816 | template<int size, bool big_endian> |
4817 | void | |
4818 | Output_data_glink<size, big_endian>::set_final_data_size() | |
4819 | { | |
ec661b9d AM |
4820 | unsigned int count = this->targ_->plt_entry_count(); |
4821 | section_size_type total = 0; | |
cf43a2fe AM |
4822 | |
4823 | if (count != 0) | |
4824 | { | |
4825 | if (size == 32) | |
4826 | { | |
cf43a2fe AM |
4827 | // space for branch table |
4828 | total += 4 * (count - 1); | |
4829 | ||
4830 | total += -total & 15; | |
4831 | total += this->pltresolve_size; | |
4832 | } | |
4833 | else | |
4834 | { | |
cf43a2fe AM |
4835 | total += this->pltresolve_size; |
4836 | ||
4837 | // space for branch table | |
b4f7960d AM |
4838 | total += 4 * count; |
4839 | if (this->targ_->abiversion() < 2) | |
4840 | { | |
4841 | total += 4 * count; | |
4842 | if (count > 0x8000) | |
4843 | total += 4 * (count - 0x8000); | |
4844 | } | |
cf43a2fe AM |
4845 | } |
4846 | } | |
9055360d AM |
4847 | this->end_branch_table_ = total; |
4848 | total = (total + 15) & -16; | |
4849 | total += this->ge_size_; | |
cf43a2fe AM |
4850 | |
4851 | this->set_data_size(total); | |
4852 | } | |
4853 | ||
590b87ff AM |
4854 | // Define symbols on stubs, identifying the stub. |
4855 | ||
4856 | template<int size, bool big_endian> | |
4857 | void | |
4858 | Stub_table<size, big_endian>::define_stub_syms(Symbol_table* symtab) | |
4859 | { | |
4860 | if (!this->plt_call_stubs_.empty()) | |
4861 | { | |
4862 | // The key for the plt call stub hash table includes addresses, | |
4863 | // therefore traversal order depends on those addresses, which | |
4864 | // can change between runs if gold is a PIE. Unfortunately the | |
4865 | // output .symtab ordering depends on the order in which symbols | |
4866 | // are added to the linker symtab. We want reproducible output | |
4867 | // so must sort the call stub symbols. | |
4868 | typedef typename Plt_stub_entries::const_iterator plt_iter; | |
4869 | std::vector<plt_iter> sorted; | |
4870 | sorted.resize(this->plt_call_stubs_.size()); | |
4871 | ||
4872 | for (plt_iter cs = this->plt_call_stubs_.begin(); | |
4873 | cs != this->plt_call_stubs_.end(); | |
4874 | ++cs) | |
bdab445c | 4875 | sorted[cs->second.indx_] = cs; |
590b87ff AM |
4876 | |
4877 | for (unsigned int i = 0; i < this->plt_call_stubs_.size(); ++i) | |
4878 | { | |
4879 | plt_iter cs = sorted[i]; | |
4880 | char add[10]; | |
4881 | add[0] = 0; | |
4882 | if (cs->first.addend_ != 0) | |
4883 | sprintf(add, "+%x", static_cast<uint32_t>(cs->first.addend_)); | |
94de2a2c JC |
4884 | char obj[10]; |
4885 | obj[0] = 0; | |
4886 | if (cs->first.object_) | |
590b87ff AM |
4887 | { |
4888 | const Powerpc_relobj<size, big_endian>* ppcobj = static_cast | |
4889 | <const Powerpc_relobj<size, big_endian>*>(cs->first.object_); | |
94de2a2c JC |
4890 | sprintf(obj, "%x:", ppcobj->uniq()); |
4891 | } | |
4892 | char localname[9]; | |
4893 | const char *symname; | |
4894 | if (cs->first.sym_ == NULL) | |
4895 | { | |
4896 | sprintf(localname, "%x", cs->first.locsym_); | |
590b87ff AM |
4897 | symname = localname; |
4898 | } | |
4899 | else | |
4900 | symname = cs->first.sym_->name(); | |
94de2a2c JC |
4901 | char* name = new char[8 + 10 + strlen(obj) + strlen(symname) + strlen(add) + 1]; |
4902 | sprintf(name, "%08x.plt_call.%s%s%s", this->uniq_, obj, symname, add); | |
bdab445c AM |
4903 | Address value |
4904 | = this->stub_address() - this->address() + cs->second.off_; | |
590b87ff AM |
4905 | unsigned int stub_size = this->plt_call_size(cs); |
4906 | this->targ_->define_local(symtab, name, this, value, stub_size); | |
4907 | } | |
4908 | } | |
4909 | ||
4910 | typedef typename Branch_stub_entries::const_iterator branch_iter; | |
4911 | for (branch_iter bs = this->long_branch_stubs_.begin(); | |
4912 | bs != this->long_branch_stubs_.end(); | |
4913 | ++bs) | |
4914 | { | |
4915 | if (bs->first.save_res_) | |
4916 | continue; | |
4917 | ||
4918 | char* name = new char[8 + 13 + 16 + 1]; | |
4919 | sprintf(name, "%08x.long_branch.%llx", this->uniq_, | |
4920 | static_cast<unsigned long long>(bs->first.dest_)); | |
4921 | Address value = (this->stub_address() - this->address() | |
4922 | + this->plt_size_ + bs->second); | |
4923 | unsigned int stub_size = this->branch_stub_size(bs); | |
4924 | this->targ_->define_local(symtab, name, this, value, stub_size); | |
4925 | } | |
4926 | } | |
4927 | ||
ec661b9d | 4928 | // Write out plt and long branch stub code. |
cf43a2fe AM |
4929 | |
4930 | template<int size, bool big_endian> | |
4931 | void | |
ec661b9d | 4932 | Stub_table<size, big_endian>::do_write(Output_file* of) |
cf43a2fe | 4933 | { |
ec661b9d AM |
4934 | if (this->plt_call_stubs_.empty() |
4935 | && this->long_branch_stubs_.empty()) | |
4936 | return; | |
4937 | ||
4938 | const section_size_type start_off = this->offset(); | |
4939 | const section_size_type off = this->stub_offset(); | |
42cacb20 | 4940 | const section_size_type oview_size = |
ec661b9d | 4941 | convert_to_section_size_type(this->data_size() - (off - start_off)); |
cf43a2fe | 4942 | unsigned char* const oview = of->get_output_view(off, oview_size); |
c9269dff | 4943 | unsigned char* p; |
42cacb20 | 4944 | |
cf43a2fe AM |
4945 | if (size == 64) |
4946 | { | |
ec661b9d AM |
4947 | const Output_data_got_powerpc<size, big_endian>* got |
4948 | = this->targ_->got_section(); | |
dd93cd0a | 4949 | Address got_os_addr = got->output_section()->address(); |
c9269dff | 4950 | |
ec661b9d | 4951 | if (!this->plt_call_stubs_.empty()) |
cf43a2fe | 4952 | { |
ec661b9d AM |
4953 | // The base address of the .plt section. |
4954 | Address plt_base = this->targ_->plt_section()->address(); | |
4955 | Address iplt_base = invalid_address; | |
4956 | ||
4957 | // Write out plt call stubs. | |
4958 | typename Plt_stub_entries::const_iterator cs; | |
4959 | for (cs = this->plt_call_stubs_.begin(); | |
4960 | cs != this->plt_call_stubs_.end(); | |
4961 | ++cs) | |
e5d5f5ed | 4962 | { |
91c2b899 AM |
4963 | bool is_iplt; |
4964 | Address pltoff = this->plt_off(cs, &is_iplt); | |
9e69ed50 | 4965 | Address plt_addr = pltoff; |
91c2b899 | 4966 | if (is_iplt) |
ec661b9d AM |
4967 | { |
4968 | if (iplt_base == invalid_address) | |
4969 | iplt_base = this->targ_->iplt_section()->address(); | |
4970 | plt_addr += iplt_base; | |
4971 | } | |
4972 | else | |
4973 | plt_addr += plt_base; | |
4974 | const Powerpc_relobj<size, big_endian>* ppcobj = static_cast | |
4975 | <const Powerpc_relobj<size, big_endian>*>(cs->first.object_); | |
4976 | Address got_addr = got_os_addr + ppcobj->toc_base_offset(); | |
9e69ed50 | 4977 | Address off = plt_addr - got_addr; |
ec661b9d | 4978 | |
9e69ed50 | 4979 | if (off + 0x80008000 > 0xffffffff || (off & 7) != 0) |
ec661b9d AM |
4980 | gold_error(_("%s: linkage table error against `%s'"), |
4981 | cs->first.object_->name().c_str(), | |
4982 | cs->first.sym_->demangled_name().c_str()); | |
4983 | ||
b4f7960d AM |
4984 | bool plt_load_toc = this->targ_->abiversion() < 2; |
4985 | bool static_chain | |
4986 | = plt_load_toc && parameters->options().plt_static_chain(); | |
4987 | bool thread_safe | |
4988 | = plt_load_toc && this->targ_->plt_thread_safe(); | |
9e69ed50 AM |
4989 | bool use_fake_dep = false; |
4990 | Address cmp_branch_off = 0; | |
4991 | if (thread_safe) | |
4992 | { | |
4993 | unsigned int pltindex | |
4994 | = ((pltoff - this->targ_->first_plt_entry_offset()) | |
4995 | / this->targ_->plt_entry_size()); | |
4996 | Address glinkoff | |
4997 | = (this->targ_->glink_section()->pltresolve_size | |
4998 | + pltindex * 8); | |
4999 | if (pltindex > 32768) | |
5000 | glinkoff += (pltindex - 32768) * 4; | |
5001 | Address to | |
5002 | = this->targ_->glink_section()->address() + glinkoff; | |
5003 | Address from | |
7e57d19e AM |
5004 | = (this->stub_address() + cs->second.off_ + 20 |
5005 | + 4 * cs->second.r2save_ | |
9e69ed50 AM |
5006 | + 4 * (ha(off) != 0) |
5007 | + 4 * (ha(off + 8 + 8 * static_chain) != ha(off)) | |
5008 | + 4 * static_chain); | |
5009 | cmp_branch_off = to - from; | |
5010 | use_fake_dep = cmp_branch_off + (1 << 25) >= (1 << 26); | |
5011 | } | |
5012 | ||
bdab445c | 5013 | p = oview + cs->second.off_; |
9e69ed50 | 5014 | if (ha(off) != 0) |
ec661b9d | 5015 | { |
7e57d19e AM |
5016 | if (cs->second.r2save_) |
5017 | { | |
5018 | write_insn<big_endian>(p, | |
5019 | std_2_1 + this->targ_->stk_toc()); | |
5020 | p += 4; | |
5021 | } | |
397998fc AM |
5022 | if (plt_load_toc) |
5023 | { | |
5024 | write_insn<big_endian>(p, addis_11_2 + ha(off)); | |
5025 | p += 4; | |
5026 | write_insn<big_endian>(p, ld_12_11 + l(off)); | |
5027 | p += 4; | |
5028 | } | |
5029 | else | |
5030 | { | |
5031 | write_insn<big_endian>(p, addis_12_2 + ha(off)); | |
5032 | p += 4; | |
5033 | write_insn<big_endian>(p, ld_12_12 + l(off)); | |
5034 | p += 4; | |
5035 | } | |
b4f7960d AM |
5036 | if (plt_load_toc |
5037 | && ha(off + 8 + 8 * static_chain) != ha(off)) | |
ec661b9d | 5038 | { |
b4f7960d AM |
5039 | write_insn<big_endian>(p, addi_11_11 + l(off)); |
5040 | p += 4; | |
9e69ed50 | 5041 | off = 0; |
ec661b9d | 5042 | } |
b4f7960d AM |
5043 | write_insn<big_endian>(p, mtctr_12); |
5044 | p += 4; | |
5045 | if (plt_load_toc) | |
9e69ed50 | 5046 | { |
b4f7960d AM |
5047 | if (use_fake_dep) |
5048 | { | |
5049 | write_insn<big_endian>(p, xor_2_12_12); | |
5050 | p += 4; | |
5051 | write_insn<big_endian>(p, add_11_11_2); | |
5052 | p += 4; | |
5053 | } | |
5054 | write_insn<big_endian>(p, ld_2_11 + l(off + 8)); | |
5055 | p += 4; | |
5056 | if (static_chain) | |
5057 | { | |
5058 | write_insn<big_endian>(p, ld_11_11 + l(off + 16)); | |
5059 | p += 4; | |
5060 | } | |
9e69ed50 | 5061 | } |
ec661b9d AM |
5062 | } |
5063 | else | |
5064 | { | |
7e57d19e AM |
5065 | if (cs->second.r2save_) |
5066 | { | |
5067 | write_insn<big_endian>(p, | |
5068 | std_2_1 + this->targ_->stk_toc()); | |
5069 | p += 4; | |
5070 | } | |
b4f7960d AM |
5071 | write_insn<big_endian>(p, ld_12_2 + l(off)); |
5072 | p += 4; | |
5073 | if (plt_load_toc | |
5074 | && ha(off + 8 + 8 * static_chain) != ha(off)) | |
ec661b9d | 5075 | { |
b4f7960d AM |
5076 | write_insn<big_endian>(p, addi_2_2 + l(off)); |
5077 | p += 4; | |
9e69ed50 | 5078 | off = 0; |
ec661b9d | 5079 | } |
b4f7960d AM |
5080 | write_insn<big_endian>(p, mtctr_12); |
5081 | p += 4; | |
5082 | if (plt_load_toc) | |
9e69ed50 | 5083 | { |
b4f7960d AM |
5084 | if (use_fake_dep) |
5085 | { | |
5086 | write_insn<big_endian>(p, xor_11_12_12); | |
5087 | p += 4; | |
5088 | write_insn<big_endian>(p, add_2_2_11); | |
5089 | p += 4; | |
5090 | } | |
5091 | if (static_chain) | |
5092 | { | |
5093 | write_insn<big_endian>(p, ld_11_2 + l(off + 16)); | |
5094 | p += 4; | |
5095 | } | |
5096 | write_insn<big_endian>(p, ld_2_2 + l(off + 8)); | |
5097 | p += 4; | |
9e69ed50 | 5098 | } |
ec661b9d | 5099 | } |
9e69ed50 AM |
5100 | if (thread_safe && !use_fake_dep) |
5101 | { | |
b4f7960d AM |
5102 | write_insn<big_endian>(p, cmpldi_2_0); |
5103 | p += 4; | |
5104 | write_insn<big_endian>(p, bnectr_p4); | |
5105 | p += 4; | |
9e69ed50 AM |
5106 | write_insn<big_endian>(p, b | (cmp_branch_off & 0x3fffffc)); |
5107 | } | |
5108 | else | |
5109 | write_insn<big_endian>(p, bctr); | |
e5d5f5ed | 5110 | } |
ec661b9d AM |
5111 | } |
5112 | ||
5113 | // Write out long branch stubs. | |
5114 | typename Branch_stub_entries::const_iterator bs; | |
5115 | for (bs = this->long_branch_stubs_.begin(); | |
5116 | bs != this->long_branch_stubs_.end(); | |
5117 | ++bs) | |
5118 | { | |
d49044c7 AM |
5119 | if (bs->first.save_res_) |
5120 | continue; | |
ec661b9d AM |
5121 | p = oview + this->plt_size_ + bs->second; |
5122 | Address loc = this->stub_address() + this->plt_size_ + bs->second; | |
5123 | Address delta = bs->first.dest_ - loc; | |
5124 | if (delta + (1 << 25) < 2 << 25) | |
5125 | write_insn<big_endian>(p, b | (delta & 0x3fffffc)); | |
e5d5f5ed | 5126 | else |
cf43a2fe | 5127 | { |
ec661b9d AM |
5128 | Address brlt_addr |
5129 | = this->targ_->find_branch_lookup_table(bs->first.dest_); | |
5130 | gold_assert(brlt_addr != invalid_address); | |
5131 | brlt_addr += this->targ_->brlt_section()->address(); | |
5132 | Address got_addr = got_os_addr + bs->first.toc_base_off_; | |
5133 | Address brltoff = brlt_addr - got_addr; | |
5134 | if (ha(brltoff) == 0) | |
5135 | { | |
b4f7960d | 5136 | write_insn<big_endian>(p, ld_12_2 + l(brltoff)), p += 4; |
ec661b9d AM |
5137 | } |
5138 | else | |
cf43a2fe | 5139 | { |
397998fc AM |
5140 | write_insn<big_endian>(p, addis_12_2 + ha(brltoff)), p += 4; |
5141 | write_insn<big_endian>(p, ld_12_12 + l(brltoff)), p += 4; | |
cf43a2fe | 5142 | } |
b4f7960d | 5143 | write_insn<big_endian>(p, mtctr_12), p += 4; |
ec661b9d | 5144 | write_insn<big_endian>(p, bctr); |
cf43a2fe | 5145 | } |
ec661b9d AM |
5146 | } |
5147 | } | |
5148 | else | |
5149 | { | |
5150 | if (!this->plt_call_stubs_.empty()) | |
5151 | { | |
5152 | // The base address of the .plt section. | |
5153 | Address plt_base = this->targ_->plt_section()->address(); | |
5154 | Address iplt_base = invalid_address; | |
5155 | // The address of _GLOBAL_OFFSET_TABLE_. | |
5156 | Address g_o_t = invalid_address; | |
5157 | ||
5158 | // Write out plt call stubs. | |
5159 | typename Plt_stub_entries::const_iterator cs; | |
5160 | for (cs = this->plt_call_stubs_.begin(); | |
5161 | cs != this->plt_call_stubs_.end(); | |
5162 | ++cs) | |
cf43a2fe | 5163 | { |
91c2b899 AM |
5164 | bool is_iplt; |
5165 | Address plt_addr = this->plt_off(cs, &is_iplt); | |
5166 | if (is_iplt) | |
ec661b9d AM |
5167 | { |
5168 | if (iplt_base == invalid_address) | |
5169 | iplt_base = this->targ_->iplt_section()->address(); | |
5170 | plt_addr += iplt_base; | |
5171 | } | |
5172 | else | |
5173 | plt_addr += plt_base; | |
5174 | ||
bdab445c | 5175 | p = oview + cs->second.off_; |
ec661b9d AM |
5176 | if (parameters->options().output_is_position_independent()) |
5177 | { | |
5178 | Address got_addr; | |
5179 | const Powerpc_relobj<size, big_endian>* ppcobj | |
5180 | = (static_cast<const Powerpc_relobj<size, big_endian>*> | |
5181 | (cs->first.object_)); | |
5182 | if (ppcobj != NULL && cs->first.addend_ >= 32768) | |
5183 | { | |
5184 | unsigned int got2 = ppcobj->got2_shndx(); | |
5185 | got_addr = ppcobj->get_output_section_offset(got2); | |
5186 | gold_assert(got_addr != invalid_address); | |
5187 | got_addr += (ppcobj->output_section(got2)->address() | |
5188 | + cs->first.addend_); | |
5189 | } | |
5190 | else | |
5191 | { | |
5192 | if (g_o_t == invalid_address) | |
5193 | { | |
5194 | const Output_data_got_powerpc<size, big_endian>* got | |
5195 | = this->targ_->got_section(); | |
5196 | g_o_t = got->address() + got->g_o_t(); | |
5197 | } | |
5198 | got_addr = g_o_t; | |
5199 | } | |
5200 | ||
9e69ed50 AM |
5201 | Address off = plt_addr - got_addr; |
5202 | if (ha(off) == 0) | |
ec661b9d | 5203 | { |
9e69ed50 | 5204 | write_insn<big_endian>(p + 0, lwz_11_30 + l(off)); |
ec661b9d AM |
5205 | write_insn<big_endian>(p + 4, mtctr_11); |
5206 | write_insn<big_endian>(p + 8, bctr); | |
5207 | } | |
5208 | else | |
5209 | { | |
9e69ed50 AM |
5210 | write_insn<big_endian>(p + 0, addis_11_30 + ha(off)); |
5211 | write_insn<big_endian>(p + 4, lwz_11_11 + l(off)); | |
ec661b9d AM |
5212 | write_insn<big_endian>(p + 8, mtctr_11); |
5213 | write_insn<big_endian>(p + 12, bctr); | |
5214 | } | |
5215 | } | |
5216 | else | |
5217 | { | |
5218 | write_insn<big_endian>(p + 0, lis_11 + ha(plt_addr)); | |
5219 | write_insn<big_endian>(p + 4, lwz_11_11 + l(plt_addr)); | |
5220 | write_insn<big_endian>(p + 8, mtctr_11); | |
5221 | write_insn<big_endian>(p + 12, bctr); | |
5222 | } | |
5223 | } | |
5224 | } | |
5225 | ||
5226 | // Write out long branch stubs. | |
5227 | typename Branch_stub_entries::const_iterator bs; | |
5228 | for (bs = this->long_branch_stubs_.begin(); | |
5229 | bs != this->long_branch_stubs_.end(); | |
5230 | ++bs) | |
5231 | { | |
d49044c7 AM |
5232 | if (bs->first.save_res_) |
5233 | continue; | |
ec661b9d AM |
5234 | p = oview + this->plt_size_ + bs->second; |
5235 | Address loc = this->stub_address() + this->plt_size_ + bs->second; | |
5236 | Address delta = bs->first.dest_ - loc; | |
5237 | if (delta + (1 << 25) < 2 << 25) | |
5238 | write_insn<big_endian>(p, b | (delta & 0x3fffffc)); | |
5239 | else if (!parameters->options().output_is_position_independent()) | |
5240 | { | |
5241 | write_insn<big_endian>(p + 0, lis_12 + ha(bs->first.dest_)); | |
5242 | write_insn<big_endian>(p + 4, addi_12_12 + l(bs->first.dest_)); | |
5243 | write_insn<big_endian>(p + 8, mtctr_12); | |
5244 | write_insn<big_endian>(p + 12, bctr); | |
5245 | } | |
5246 | else | |
5247 | { | |
5248 | delta -= 8; | |
5249 | write_insn<big_endian>(p + 0, mflr_0); | |
5250 | write_insn<big_endian>(p + 4, bcl_20_31); | |
5251 | write_insn<big_endian>(p + 8, mflr_12); | |
5252 | write_insn<big_endian>(p + 12, addis_12_12 + ha(delta)); | |
5253 | write_insn<big_endian>(p + 16, addi_12_12 + l(delta)); | |
5254 | write_insn<big_endian>(p + 20, mtlr_0); | |
5255 | write_insn<big_endian>(p + 24, mtctr_12); | |
5256 | write_insn<big_endian>(p + 28, bctr); | |
cf43a2fe AM |
5257 | } |
5258 | } | |
ec661b9d | 5259 | } |
d49044c7 AM |
5260 | if (this->need_save_res_) |
5261 | { | |
5262 | p = oview + this->plt_size_ + this->branch_size_; | |
5263 | memcpy (p, this->targ_->savres_section()->contents(), | |
5264 | this->targ_->savres_section()->data_size()); | |
5265 | } | |
ec661b9d AM |
5266 | } |
5267 | ||
5268 | // Write out .glink. | |
5269 | ||
5270 | template<int size, bool big_endian> | |
5271 | void | |
5272 | Output_data_glink<size, big_endian>::do_write(Output_file* of) | |
5273 | { | |
5274 | const section_size_type off = this->offset(); | |
5275 | const section_size_type oview_size = | |
5276 | convert_to_section_size_type(this->data_size()); | |
5277 | unsigned char* const oview = of->get_output_view(off, oview_size); | |
5278 | unsigned char* p; | |
5279 | ||
5280 | // The base address of the .plt section. | |
5281 | typedef typename elfcpp::Elf_types<size>::Elf_Addr Address; | |
5282 | Address plt_base = this->targ_->plt_section()->address(); | |
cf43a2fe | 5283 | |
ec661b9d AM |
5284 | if (size == 64) |
5285 | { | |
9055360d | 5286 | if (this->end_branch_table_ != 0) |
b4f7960d | 5287 | { |
9055360d AM |
5288 | // Write pltresolve stub. |
5289 | p = oview; | |
5290 | Address after_bcl = this->address() + 16; | |
5291 | Address pltoff = plt_base - after_bcl; | |
5292 | ||
5293 | elfcpp::Swap<64, big_endian>::writeval(p, pltoff), p += 8; | |
cf43a2fe | 5294 | |
b4f7960d | 5295 | if (this->targ_->abiversion() < 2) |
cf43a2fe | 5296 | { |
9055360d AM |
5297 | write_insn<big_endian>(p, mflr_12), p += 4; |
5298 | write_insn<big_endian>(p, bcl_20_31), p += 4; | |
5299 | write_insn<big_endian>(p, mflr_11), p += 4; | |
5300 | write_insn<big_endian>(p, ld_2_11 + l(-16)), p += 4; | |
5301 | write_insn<big_endian>(p, mtlr_12), p += 4; | |
5302 | write_insn<big_endian>(p, add_11_2_11), p += 4; | |
5303 | write_insn<big_endian>(p, ld_12_11 + 0), p += 4; | |
5304 | write_insn<big_endian>(p, ld_2_11 + 8), p += 4; | |
5305 | write_insn<big_endian>(p, mtctr_12), p += 4; | |
5306 | write_insn<big_endian>(p, ld_11_11 + 16), p += 4; | |
5307 | } | |
5308 | else | |
5309 | { | |
5310 | write_insn<big_endian>(p, mflr_0), p += 4; | |
5311 | write_insn<big_endian>(p, bcl_20_31), p += 4; | |
5312 | write_insn<big_endian>(p, mflr_11), p += 4; | |
7ee7ff70 | 5313 | write_insn<big_endian>(p, std_2_1 + 24), p += 4; |
9055360d AM |
5314 | write_insn<big_endian>(p, ld_2_11 + l(-16)), p += 4; |
5315 | write_insn<big_endian>(p, mtlr_0), p += 4; | |
5316 | write_insn<big_endian>(p, sub_12_12_11), p += 4; | |
5317 | write_insn<big_endian>(p, add_11_2_11), p += 4; | |
5318 | write_insn<big_endian>(p, addi_0_12 + l(-48)), p += 4; | |
5319 | write_insn<big_endian>(p, ld_12_11 + 0), p += 4; | |
5320 | write_insn<big_endian>(p, srdi_0_0_2), p += 4; | |
5321 | write_insn<big_endian>(p, mtctr_12), p += 4; | |
5322 | write_insn<big_endian>(p, ld_11_11 + 8), p += 4; | |
5323 | } | |
5324 | write_insn<big_endian>(p, bctr), p += 4; | |
5325 | while (p < oview + this->pltresolve_size) | |
5326 | write_insn<big_endian>(p, nop), p += 4; | |
5327 | ||
5328 | // Write lazy link call stubs. | |
5329 | uint32_t indx = 0; | |
5330 | while (p < oview + this->end_branch_table_) | |
5331 | { | |
5332 | if (this->targ_->abiversion() < 2) | |
b4f7960d | 5333 | { |
9055360d AM |
5334 | if (indx < 0x8000) |
5335 | { | |
5336 | write_insn<big_endian>(p, li_0_0 + indx), p += 4; | |
5337 | } | |
5338 | else | |
5339 | { | |
bbec1a5d | 5340 | write_insn<big_endian>(p, lis_0 + hi(indx)), p += 4; |
9055360d AM |
5341 | write_insn<big_endian>(p, ori_0_0_0 + l(indx)), p += 4; |
5342 | } | |
b4f7960d | 5343 | } |
9055360d AM |
5344 | uint32_t branch_off = 8 - (p - oview); |
5345 | write_insn<big_endian>(p, b + (branch_off & 0x3fffffc)), p += 4; | |
5346 | indx++; | |
cf43a2fe | 5347 | } |
9055360d AM |
5348 | } |
5349 | ||
5350 | Address plt_base = this->targ_->plt_section()->address(); | |
5351 | Address iplt_base = invalid_address; | |
5352 | unsigned int global_entry_off = (this->end_branch_table_ + 15) & -16; | |
5353 | Address global_entry_base = this->address() + global_entry_off; | |
5354 | typename Global_entry_stub_entries::const_iterator ge; | |
5355 | for (ge = this->global_entry_stubs_.begin(); | |
5356 | ge != this->global_entry_stubs_.end(); | |
5357 | ++ge) | |
5358 | { | |
5359 | p = oview + global_entry_off + ge->second; | |
5360 | Address plt_addr = ge->first->plt_offset(); | |
5361 | if (ge->first->type() == elfcpp::STT_GNU_IFUNC | |
5362 | && ge->first->can_use_relative_reloc(false)) | |
5363 | { | |
5364 | if (iplt_base == invalid_address) | |
5365 | iplt_base = this->targ_->iplt_section()->address(); | |
5366 | plt_addr += iplt_base; | |
5367 | } | |
5368 | else | |
5369 | plt_addr += plt_base; | |
5370 | Address my_addr = global_entry_base + ge->second; | |
5371 | Address off = plt_addr - my_addr; | |
5372 | ||
5373 | if (off + 0x80008000 > 0xffffffff || (off & 3) != 0) | |
5374 | gold_error(_("%s: linkage table error against `%s'"), | |
5375 | ge->first->object()->name().c_str(), | |
5376 | ge->first->demangled_name().c_str()); | |
5377 | ||
5378 | write_insn<big_endian>(p, addis_12_12 + ha(off)), p += 4; | |
5379 | write_insn<big_endian>(p, ld_12_12 + l(off)), p += 4; | |
5380 | write_insn<big_endian>(p, mtctr_12), p += 4; | |
5381 | write_insn<big_endian>(p, bctr); | |
cf43a2fe AM |
5382 | } |
5383 | } | |
5384 | else | |
5385 | { | |
ec661b9d AM |
5386 | const Output_data_got_powerpc<size, big_endian>* got |
5387 | = this->targ_->got_section(); | |
dd93cd0a AM |
5388 | // The address of _GLOBAL_OFFSET_TABLE_. |
5389 | Address g_o_t = got->address() + got->g_o_t(); | |
c9269dff | 5390 | |
cf43a2fe | 5391 | // Write out pltresolve branch table. |
ec661b9d | 5392 | p = oview; |
cf43a2fe | 5393 | unsigned int the_end = oview_size - this->pltresolve_size; |
c9269dff | 5394 | unsigned char* end_p = oview + the_end; |
cf43a2fe AM |
5395 | while (p < end_p - 8 * 4) |
5396 | write_insn<big_endian>(p, b + end_p - p), p += 4; | |
5397 | while (p < end_p) | |
5398 | write_insn<big_endian>(p, nop), p += 4; | |
42cacb20 | 5399 | |
cf43a2fe AM |
5400 | // Write out pltresolve call stub. |
5401 | if (parameters->options().output_is_position_independent()) | |
42cacb20 | 5402 | { |
ec661b9d | 5403 | Address res0_off = 0; |
dd93cd0a AM |
5404 | Address after_bcl_off = the_end + 12; |
5405 | Address bcl_res0 = after_bcl_off - res0_off; | |
cf43a2fe AM |
5406 | |
5407 | write_insn<big_endian>(p + 0, addis_11_11 + ha(bcl_res0)); | |
5408 | write_insn<big_endian>(p + 4, mflr_0); | |
5409 | write_insn<big_endian>(p + 8, bcl_20_31); | |
5410 | write_insn<big_endian>(p + 12, addi_11_11 + l(bcl_res0)); | |
5411 | write_insn<big_endian>(p + 16, mflr_12); | |
5412 | write_insn<big_endian>(p + 20, mtlr_0); | |
5413 | write_insn<big_endian>(p + 24, sub_11_11_12); | |
5414 | ||
dd93cd0a | 5415 | Address got_bcl = g_o_t + 4 - (after_bcl_off + this->address()); |
cf43a2fe AM |
5416 | |
5417 | write_insn<big_endian>(p + 28, addis_12_12 + ha(got_bcl)); | |
5418 | if (ha(got_bcl) == ha(got_bcl + 4)) | |
5419 | { | |
5420 | write_insn<big_endian>(p + 32, lwz_0_12 + l(got_bcl)); | |
5421 | write_insn<big_endian>(p + 36, lwz_12_12 + l(got_bcl + 4)); | |
5422 | } | |
5423 | else | |
5424 | { | |
5425 | write_insn<big_endian>(p + 32, lwzu_0_12 + l(got_bcl)); | |
5426 | write_insn<big_endian>(p + 36, lwz_12_12 + 4); | |
5427 | } | |
5428 | write_insn<big_endian>(p + 40, mtctr_0); | |
5429 | write_insn<big_endian>(p + 44, add_0_11_11); | |
5430 | write_insn<big_endian>(p + 48, add_11_0_11); | |
5431 | write_insn<big_endian>(p + 52, bctr); | |
5432 | write_insn<big_endian>(p + 56, nop); | |
5433 | write_insn<big_endian>(p + 60, nop); | |
42cacb20 | 5434 | } |
cf43a2fe | 5435 | else |
42cacb20 | 5436 | { |
ec661b9d | 5437 | Address res0 = this->address(); |
cf43a2fe AM |
5438 | |
5439 | write_insn<big_endian>(p + 0, lis_12 + ha(g_o_t + 4)); | |
5440 | write_insn<big_endian>(p + 4, addis_11_11 + ha(-res0)); | |
5441 | if (ha(g_o_t + 4) == ha(g_o_t + 8)) | |
5442 | write_insn<big_endian>(p + 8, lwz_0_12 + l(g_o_t + 4)); | |
5443 | else | |
5444 | write_insn<big_endian>(p + 8, lwzu_0_12 + l(g_o_t + 4)); | |
5445 | write_insn<big_endian>(p + 12, addi_11_11 + l(-res0)); | |
5446 | write_insn<big_endian>(p + 16, mtctr_0); | |
5447 | write_insn<big_endian>(p + 20, add_0_11_11); | |
5448 | if (ha(g_o_t + 4) == ha(g_o_t + 8)) | |
5449 | write_insn<big_endian>(p + 24, lwz_12_12 + l(g_o_t + 8)); | |
5450 | else | |
5451 | write_insn<big_endian>(p + 24, lwz_12_12 + 4); | |
5452 | write_insn<big_endian>(p + 28, add_11_0_11); | |
5453 | write_insn<big_endian>(p + 32, bctr); | |
5454 | write_insn<big_endian>(p + 36, nop); | |
5455 | write_insn<big_endian>(p + 40, nop); | |
5456 | write_insn<big_endian>(p + 44, nop); | |
5457 | write_insn<big_endian>(p + 48, nop); | |
5458 | write_insn<big_endian>(p + 52, nop); | |
5459 | write_insn<big_endian>(p + 56, nop); | |
5460 | write_insn<big_endian>(p + 60, nop); | |
42cacb20 | 5461 | } |
cf43a2fe | 5462 | p += 64; |
42cacb20 DE |
5463 | } |
5464 | ||
cf43a2fe AM |
5465 | of->write_output_view(off, oview_size, oview); |
5466 | } | |
5467 | ||
f3a0ed29 AM |
5468 | |
5469 | // A class to handle linker generated save/restore functions. | |
5470 | ||
5471 | template<int size, bool big_endian> | |
5472 | class Output_data_save_res : public Output_section_data_build | |
5473 | { | |
5474 | public: | |
5475 | Output_data_save_res(Symbol_table* symtab); | |
5476 | ||
d49044c7 AM |
5477 | const unsigned char* |
5478 | contents() const | |
5479 | { | |
5480 | return contents_; | |
5481 | } | |
5482 | ||
f3a0ed29 AM |
5483 | protected: |
5484 | // Write to a map file. | |
5485 | void | |
5486 | do_print_to_mapfile(Mapfile* mapfile) const | |
5487 | { mapfile->print_output_data(this, _("** save/restore")); } | |
5488 | ||
5489 | void | |
5490 | do_write(Output_file*); | |
5491 | ||
5492 | private: | |
5493 | // The maximum size of save/restore contents. | |
5494 | static const unsigned int savres_max = 218*4; | |
5495 | ||
5496 | void | |
5497 | savres_define(Symbol_table* symtab, | |
5498 | const char *name, | |
5499 | unsigned int lo, unsigned int hi, | |
5500 | unsigned char* write_ent(unsigned char*, int), | |
5501 | unsigned char* write_tail(unsigned char*, int)); | |
5502 | ||
5503 | unsigned char *contents_; | |
5504 | }; | |
5505 | ||
5506 | template<bool big_endian> | |
5507 | static unsigned char* | |
5508 | savegpr0(unsigned char* p, int r) | |
5509 | { | |
5510 | uint32_t insn = std_0_1 + (r << 21) + (1 << 16) - (32 - r) * 8; | |
5511 | write_insn<big_endian>(p, insn); | |
5512 | return p + 4; | |
5513 | } | |
5514 | ||
5515 | template<bool big_endian> | |
5516 | static unsigned char* | |
5517 | savegpr0_tail(unsigned char* p, int r) | |
5518 | { | |
5519 | p = savegpr0<big_endian>(p, r); | |
5520 | uint32_t insn = std_0_1 + 16; | |
5521 | write_insn<big_endian>(p, insn); | |
5522 | p = p + 4; | |
5523 | write_insn<big_endian>(p, blr); | |
5524 | return p + 4; | |
5525 | } | |
5526 | ||
5527 | template<bool big_endian> | |
62fe925a | 5528 | static unsigned char* |
f3a0ed29 AM |
5529 | restgpr0(unsigned char* p, int r) |
5530 | { | |
5531 | uint32_t insn = ld_0_1 + (r << 21) + (1 << 16) - (32 - r) * 8; | |
5532 | write_insn<big_endian>(p, insn); | |
5533 | return p + 4; | |
5534 | } | |
5535 | ||
5536 | template<bool big_endian> | |
62fe925a | 5537 | static unsigned char* |
f3a0ed29 AM |
5538 | restgpr0_tail(unsigned char* p, int r) |
5539 | { | |
5540 | uint32_t insn = ld_0_1 + 16; | |
5541 | write_insn<big_endian>(p, insn); | |
5542 | p = p + 4; | |
5543 | p = restgpr0<big_endian>(p, r); | |
5544 | write_insn<big_endian>(p, mtlr_0); | |
5545 | p = p + 4; | |
5546 | if (r == 29) | |
5547 | { | |
5548 | p = restgpr0<big_endian>(p, 30); | |
5549 | p = restgpr0<big_endian>(p, 31); | |
5550 | } | |
5551 | write_insn<big_endian>(p, blr); | |
5552 | return p + 4; | |
5553 | } | |
5554 | ||
5555 | template<bool big_endian> | |
62fe925a | 5556 | static unsigned char* |
f3a0ed29 AM |
5557 | savegpr1(unsigned char* p, int r) |
5558 | { | |
5559 | uint32_t insn = std_0_12 + (r << 21) + (1 << 16) - (32 - r) * 8; | |
5560 | write_insn<big_endian>(p, insn); | |
5561 | return p + 4; | |
5562 | } | |
5563 | ||
5564 | template<bool big_endian> | |
62fe925a | 5565 | static unsigned char* |
f3a0ed29 AM |
5566 | savegpr1_tail(unsigned char* p, int r) |
5567 | { | |
5568 | p = savegpr1<big_endian>(p, r); | |
5569 | write_insn<big_endian>(p, blr); | |
5570 | return p + 4; | |
5571 | } | |
5572 | ||
5573 | template<bool big_endian> | |
62fe925a | 5574 | static unsigned char* |
f3a0ed29 AM |
5575 | restgpr1(unsigned char* p, int r) |
5576 | { | |
5577 | uint32_t insn = ld_0_12 + (r << 21) + (1 << 16) - (32 - r) * 8; | |
5578 | write_insn<big_endian>(p, insn); | |
5579 | return p + 4; | |
5580 | } | |
5581 | ||
5582 | template<bool big_endian> | |
62fe925a | 5583 | static unsigned char* |
f3a0ed29 AM |
5584 | restgpr1_tail(unsigned char* p, int r) |
5585 | { | |
5586 | p = restgpr1<big_endian>(p, r); | |
5587 | write_insn<big_endian>(p, blr); | |
5588 | return p + 4; | |
5589 | } | |
5590 | ||
5591 | template<bool big_endian> | |
62fe925a | 5592 | static unsigned char* |
f3a0ed29 AM |
5593 | savefpr(unsigned char* p, int r) |
5594 | { | |
5595 | uint32_t insn = stfd_0_1 + (r << 21) + (1 << 16) - (32 - r) * 8; | |
5596 | write_insn<big_endian>(p, insn); | |
5597 | return p + 4; | |
5598 | } | |
5599 | ||
5600 | template<bool big_endian> | |
62fe925a | 5601 | static unsigned char* |
f3a0ed29 AM |
5602 | savefpr0_tail(unsigned char* p, int r) |
5603 | { | |
5604 | p = savefpr<big_endian>(p, r); | |
5605 | write_insn<big_endian>(p, std_0_1 + 16); | |
5606 | p = p + 4; | |
5607 | write_insn<big_endian>(p, blr); | |
5608 | return p + 4; | |
5609 | } | |
5610 | ||
5611 | template<bool big_endian> | |
62fe925a | 5612 | static unsigned char* |
f3a0ed29 AM |
5613 | restfpr(unsigned char* p, int r) |
5614 | { | |
5615 | uint32_t insn = lfd_0_1 + (r << 21) + (1 << 16) - (32 - r) * 8; | |
5616 | write_insn<big_endian>(p, insn); | |
5617 | return p + 4; | |
5618 | } | |
5619 | ||
5620 | template<bool big_endian> | |
62fe925a | 5621 | static unsigned char* |
f3a0ed29 AM |
5622 | restfpr0_tail(unsigned char* p, int r) |
5623 | { | |
5624 | write_insn<big_endian>(p, ld_0_1 + 16); | |
5625 | p = p + 4; | |
5626 | p = restfpr<big_endian>(p, r); | |
5627 | write_insn<big_endian>(p, mtlr_0); | |
5628 | p = p + 4; | |
5629 | if (r == 29) | |
5630 | { | |
5631 | p = restfpr<big_endian>(p, 30); | |
5632 | p = restfpr<big_endian>(p, 31); | |
5633 | } | |
5634 | write_insn<big_endian>(p, blr); | |
5635 | return p + 4; | |
5636 | } | |
5637 | ||
5638 | template<bool big_endian> | |
62fe925a | 5639 | static unsigned char* |
f3a0ed29 AM |
5640 | savefpr1_tail(unsigned char* p, int r) |
5641 | { | |
5642 | p = savefpr<big_endian>(p, r); | |
5643 | write_insn<big_endian>(p, blr); | |
5644 | return p + 4; | |
5645 | } | |
5646 | ||
5647 | template<bool big_endian> | |
62fe925a | 5648 | static unsigned char* |
f3a0ed29 AM |
5649 | restfpr1_tail(unsigned char* p, int r) |
5650 | { | |
5651 | p = restfpr<big_endian>(p, r); | |
5652 | write_insn<big_endian>(p, blr); | |
5653 | return p + 4; | |
5654 | } | |
5655 | ||
5656 | template<bool big_endian> | |
62fe925a | 5657 | static unsigned char* |
f3a0ed29 AM |
5658 | savevr(unsigned char* p, int r) |
5659 | { | |
5660 | uint32_t insn = li_12_0 + (1 << 16) - (32 - r) * 16; | |
5661 | write_insn<big_endian>(p, insn); | |
5662 | p = p + 4; | |
5663 | insn = stvx_0_12_0 + (r << 21); | |
5664 | write_insn<big_endian>(p, insn); | |
5665 | return p + 4; | |
5666 | } | |
5667 | ||
5668 | template<bool big_endian> | |
62fe925a | 5669 | static unsigned char* |
f3a0ed29 AM |
5670 | savevr_tail(unsigned char* p, int r) |
5671 | { | |
5672 | p = savevr<big_endian>(p, r); | |
5673 | write_insn<big_endian>(p, blr); | |
5674 | return p + 4; | |
5675 | } | |
5676 | ||
5677 | template<bool big_endian> | |
62fe925a | 5678 | static unsigned char* |
f3a0ed29 AM |
5679 | restvr(unsigned char* p, int r) |
5680 | { | |
5681 | uint32_t insn = li_12_0 + (1 << 16) - (32 - r) * 16; | |
5682 | write_insn<big_endian>(p, insn); | |
5683 | p = p + 4; | |
5684 | insn = lvx_0_12_0 + (r << 21); | |
5685 | write_insn<big_endian>(p, insn); | |
5686 | return p + 4; | |
5687 | } | |
5688 | ||
5689 | template<bool big_endian> | |
62fe925a | 5690 | static unsigned char* |
f3a0ed29 AM |
5691 | restvr_tail(unsigned char* p, int r) |
5692 | { | |
5693 | p = restvr<big_endian>(p, r); | |
5694 | write_insn<big_endian>(p, blr); | |
5695 | return p + 4; | |
5696 | } | |
5697 | ||
5698 | ||
5699 | template<int size, bool big_endian> | |
5700 | Output_data_save_res<size, big_endian>::Output_data_save_res( | |
5701 | Symbol_table* symtab) | |
5702 | : Output_section_data_build(4), | |
5703 | contents_(NULL) | |
5704 | { | |
5705 | this->savres_define(symtab, | |
5706 | "_savegpr0_", 14, 31, | |
5707 | savegpr0<big_endian>, savegpr0_tail<big_endian>); | |
5708 | this->savres_define(symtab, | |
5709 | "_restgpr0_", 14, 29, | |
5710 | restgpr0<big_endian>, restgpr0_tail<big_endian>); | |
5711 | this->savres_define(symtab, | |
5712 | "_restgpr0_", 30, 31, | |
5713 | restgpr0<big_endian>, restgpr0_tail<big_endian>); | |
5714 | this->savres_define(symtab, | |
5715 | "_savegpr1_", 14, 31, | |
5716 | savegpr1<big_endian>, savegpr1_tail<big_endian>); | |
5717 | this->savres_define(symtab, | |
5718 | "_restgpr1_", 14, 31, | |
5719 | restgpr1<big_endian>, restgpr1_tail<big_endian>); | |
5720 | this->savres_define(symtab, | |
5721 | "_savefpr_", 14, 31, | |
5722 | savefpr<big_endian>, savefpr0_tail<big_endian>); | |
5723 | this->savres_define(symtab, | |
5724 | "_restfpr_", 14, 29, | |
5725 | restfpr<big_endian>, restfpr0_tail<big_endian>); | |
5726 | this->savres_define(symtab, | |
5727 | "_restfpr_", 30, 31, | |
5728 | restfpr<big_endian>, restfpr0_tail<big_endian>); | |
5729 | this->savres_define(symtab, | |
5730 | "._savef", 14, 31, | |
5731 | savefpr<big_endian>, savefpr1_tail<big_endian>); | |
5732 | this->savres_define(symtab, | |
5733 | "._restf", 14, 31, | |
5734 | restfpr<big_endian>, restfpr1_tail<big_endian>); | |
5735 | this->savres_define(symtab, | |
5736 | "_savevr_", 20, 31, | |
5737 | savevr<big_endian>, savevr_tail<big_endian>); | |
5738 | this->savres_define(symtab, | |
5739 | "_restvr_", 20, 31, | |
5740 | restvr<big_endian>, restvr_tail<big_endian>); | |
5741 | } | |
5742 | ||
5743 | template<int size, bool big_endian> | |
5744 | void | |
5745 | Output_data_save_res<size, big_endian>::savres_define( | |
5746 | Symbol_table* symtab, | |
5747 | const char *name, | |
5748 | unsigned int lo, unsigned int hi, | |
5749 | unsigned char* write_ent(unsigned char*, int), | |
5750 | unsigned char* write_tail(unsigned char*, int)) | |
5751 | { | |
5752 | size_t len = strlen(name); | |
5753 | bool writing = false; | |
5754 | char sym[16]; | |
5755 | ||
5756 | memcpy(sym, name, len); | |
5757 | sym[len + 2] = 0; | |
5758 | ||
5759 | for (unsigned int i = lo; i <= hi; i++) | |
5760 | { | |
5761 | sym[len + 0] = i / 10 + '0'; | |
5762 | sym[len + 1] = i % 10 + '0'; | |
5763 | Symbol* gsym = symtab->lookup(sym); | |
5764 | bool refd = gsym != NULL && gsym->is_undefined(); | |
5765 | writing = writing || refd; | |
5766 | if (writing) | |
5767 | { | |
5768 | if (this->contents_ == NULL) | |
5769 | this->contents_ = new unsigned char[this->savres_max]; | |
5770 | ||
ec661b9d | 5771 | section_size_type value = this->current_data_size(); |
f3a0ed29 AM |
5772 | unsigned char* p = this->contents_ + value; |
5773 | if (i != hi) | |
5774 | p = write_ent(p, i); | |
5775 | else | |
5776 | p = write_tail(p, i); | |
ec661b9d | 5777 | section_size_type cur_size = p - this->contents_; |
f3a0ed29 AM |
5778 | this->set_current_data_size(cur_size); |
5779 | if (refd) | |
5780 | symtab->define_in_output_data(sym, NULL, Symbol_table::PREDEFINED, | |
5781 | this, value, cur_size - value, | |
5782 | elfcpp::STT_FUNC, elfcpp::STB_GLOBAL, | |
5783 | elfcpp::STV_HIDDEN, 0, false, false); | |
5784 | } | |
5785 | } | |
5786 | } | |
5787 | ||
5788 | // Write out save/restore. | |
5789 | ||
5790 | template<int size, bool big_endian> | |
5791 | void | |
5792 | Output_data_save_res<size, big_endian>::do_write(Output_file* of) | |
5793 | { | |
ec661b9d | 5794 | const section_size_type off = this->offset(); |
f3a0ed29 AM |
5795 | const section_size_type oview_size = |
5796 | convert_to_section_size_type(this->data_size()); | |
5797 | unsigned char* const oview = of->get_output_view(off, oview_size); | |
5798 | memcpy(oview, this->contents_, oview_size); | |
5799 | of->write_output_view(off, oview_size, oview); | |
5800 | } | |
5801 | ||
5802 | ||
cf43a2fe | 5803 | // Create the glink section. |
42cacb20 | 5804 | |
cf43a2fe AM |
5805 | template<int size, bool big_endian> |
5806 | void | |
5807 | Target_powerpc<size, big_endian>::make_glink_section(Layout* layout) | |
5808 | { | |
5809 | if (this->glink_ == NULL) | |
5810 | { | |
5811 | this->glink_ = new Output_data_glink<size, big_endian>(this); | |
9d5781f8 | 5812 | this->glink_->add_eh_frame(layout); |
cf43a2fe AM |
5813 | layout->add_output_section_data(".text", elfcpp::SHT_PROGBITS, |
5814 | elfcpp::SHF_ALLOC | elfcpp::SHF_EXECINSTR, | |
5815 | this->glink_, ORDER_TEXT, false); | |
5816 | } | |
42cacb20 DE |
5817 | } |
5818 | ||
5819 | // Create a PLT entry for a global symbol. | |
5820 | ||
5821 | template<int size, bool big_endian> | |
5822 | void | |
ec661b9d AM |
5823 | Target_powerpc<size, big_endian>::make_plt_entry(Symbol_table* symtab, |
5824 | Layout* layout, | |
5825 | Symbol* gsym) | |
42cacb20 | 5826 | { |
e5d5f5ed AM |
5827 | if (gsym->type() == elfcpp::STT_GNU_IFUNC |
5828 | && gsym->can_use_relative_reloc(false)) | |
5829 | { | |
5830 | if (this->iplt_ == NULL) | |
40b469d7 | 5831 | this->make_iplt_section(symtab, layout); |
03e25981 | 5832 | this->iplt_->add_ifunc_entry(gsym); |
e5d5f5ed AM |
5833 | } |
5834 | else | |
5835 | { | |
5836 | if (this->plt_ == NULL) | |
40b469d7 | 5837 | this->make_plt_section(symtab, layout); |
03e25981 | 5838 | this->plt_->add_entry(gsym); |
e5d5f5ed | 5839 | } |
e5d5f5ed | 5840 | } |
42cacb20 | 5841 | |
e5d5f5ed | 5842 | // Make a PLT entry for a local STT_GNU_IFUNC symbol. |
612a8d3d | 5843 | |
e5d5f5ed AM |
5844 | template<int size, bool big_endian> |
5845 | void | |
5846 | Target_powerpc<size, big_endian>::make_local_ifunc_plt_entry( | |
40b469d7 | 5847 | Symbol_table* symtab, |
e5d5f5ed | 5848 | Layout* layout, |
ec661b9d AM |
5849 | Sized_relobj_file<size, big_endian>* relobj, |
5850 | unsigned int r_sym) | |
e5d5f5ed AM |
5851 | { |
5852 | if (this->iplt_ == NULL) | |
40b469d7 | 5853 | this->make_iplt_section(symtab, layout); |
03e25981 | 5854 | this->iplt_->add_local_ifunc_entry(relobj, r_sym); |
42cacb20 DE |
5855 | } |
5856 | ||
0e70b911 CC |
5857 | // Return the number of entries in the PLT. |
5858 | ||
5859 | template<int size, bool big_endian> | |
5860 | unsigned int | |
5861 | Target_powerpc<size, big_endian>::plt_entry_count() const | |
5862 | { | |
5863 | if (this->plt_ == NULL) | |
5864 | return 0; | |
b3ccdeb5 | 5865 | return this->plt_->entry_count(); |
0e70b911 CC |
5866 | } |
5867 | ||
dd93cd0a | 5868 | // Create a GOT entry for local dynamic __tls_get_addr calls. |
42cacb20 DE |
5869 | |
5870 | template<int size, bool big_endian> | |
5871 | unsigned int | |
dd93cd0a | 5872 | Target_powerpc<size, big_endian>::tlsld_got_offset( |
6fa2a40b CC |
5873 | Symbol_table* symtab, |
5874 | Layout* layout, | |
5875 | Sized_relobj_file<size, big_endian>* object) | |
42cacb20 | 5876 | { |
dd93cd0a | 5877 | if (this->tlsld_got_offset_ == -1U) |
42cacb20 DE |
5878 | { |
5879 | gold_assert(symtab != NULL && layout != NULL && object != NULL); | |
5880 | Reloc_section* rela_dyn = this->rela_dyn_section(layout); | |
dd93cd0a AM |
5881 | Output_data_got_powerpc<size, big_endian>* got |
5882 | = this->got_section(symtab, layout); | |
5883 | unsigned int got_offset = got->add_constant_pair(0, 0); | |
42cacb20 DE |
5884 | rela_dyn->add_local(object, 0, elfcpp::R_POWERPC_DTPMOD, got, |
5885 | got_offset, 0); | |
dd93cd0a | 5886 | this->tlsld_got_offset_ = got_offset; |
42cacb20 | 5887 | } |
dd93cd0a | 5888 | return this->tlsld_got_offset_; |
42cacb20 DE |
5889 | } |
5890 | ||
95a2c8d6 RS |
5891 | // Get the Reference_flags for a particular relocation. |
5892 | ||
5893 | template<int size, bool big_endian> | |
5894 | int | |
88b8e639 AM |
5895 | Target_powerpc<size, big_endian>::Scan::get_reference_flags( |
5896 | unsigned int r_type, | |
5897 | const Target_powerpc* target) | |
95a2c8d6 | 5898 | { |
88b8e639 AM |
5899 | int ref = 0; |
5900 | ||
95a2c8d6 RS |
5901 | switch (r_type) |
5902 | { | |
5903 | case elfcpp::R_POWERPC_NONE: | |
5904 | case elfcpp::R_POWERPC_GNU_VTINHERIT: | |
5905 | case elfcpp::R_POWERPC_GNU_VTENTRY: | |
5906 | case elfcpp::R_PPC64_TOC: | |
5907 | // No symbol reference. | |
88b8e639 | 5908 | break; |
95a2c8d6 | 5909 | |
dd93cd0a AM |
5910 | case elfcpp::R_PPC64_ADDR64: |
5911 | case elfcpp::R_PPC64_UADDR64: | |
5912 | case elfcpp::R_POWERPC_ADDR32: | |
5913 | case elfcpp::R_POWERPC_UADDR32: | |
95a2c8d6 | 5914 | case elfcpp::R_POWERPC_ADDR16: |
dd93cd0a | 5915 | case elfcpp::R_POWERPC_UADDR16: |
95a2c8d6 RS |
5916 | case elfcpp::R_POWERPC_ADDR16_LO: |
5917 | case elfcpp::R_POWERPC_ADDR16_HI: | |
5918 | case elfcpp::R_POWERPC_ADDR16_HA: | |
88b8e639 AM |
5919 | ref = Symbol::ABSOLUTE_REF; |
5920 | break; | |
95a2c8d6 | 5921 | |
dd93cd0a AM |
5922 | case elfcpp::R_POWERPC_ADDR24: |
5923 | case elfcpp::R_POWERPC_ADDR14: | |
5924 | case elfcpp::R_POWERPC_ADDR14_BRTAKEN: | |
5925 | case elfcpp::R_POWERPC_ADDR14_BRNTAKEN: | |
88b8e639 AM |
5926 | ref = Symbol::FUNCTION_CALL | Symbol::ABSOLUTE_REF; |
5927 | break; | |
dd93cd0a | 5928 | |
e5d5f5ed | 5929 | case elfcpp::R_PPC64_REL64: |
dd93cd0a | 5930 | case elfcpp::R_POWERPC_REL32: |
95a2c8d6 | 5931 | case elfcpp::R_PPC_LOCAL24PC: |
6ce78956 AM |
5932 | case elfcpp::R_POWERPC_REL16: |
5933 | case elfcpp::R_POWERPC_REL16_LO: | |
5934 | case elfcpp::R_POWERPC_REL16_HI: | |
5935 | case elfcpp::R_POWERPC_REL16_HA: | |
88b8e639 AM |
5936 | ref = Symbol::RELATIVE_REF; |
5937 | break; | |
95a2c8d6 | 5938 | |
dd93cd0a | 5939 | case elfcpp::R_POWERPC_REL24: |
95a2c8d6 | 5940 | case elfcpp::R_PPC_PLTREL24: |
dd93cd0a AM |
5941 | case elfcpp::R_POWERPC_REL14: |
5942 | case elfcpp::R_POWERPC_REL14_BRTAKEN: | |
5943 | case elfcpp::R_POWERPC_REL14_BRNTAKEN: | |
88b8e639 AM |
5944 | ref = Symbol::FUNCTION_CALL | Symbol::RELATIVE_REF; |
5945 | break; | |
95a2c8d6 RS |
5946 | |
5947 | case elfcpp::R_POWERPC_GOT16: | |
5948 | case elfcpp::R_POWERPC_GOT16_LO: | |
5949 | case elfcpp::R_POWERPC_GOT16_HI: | |
5950 | case elfcpp::R_POWERPC_GOT16_HA: | |
e5d5f5ed AM |
5951 | case elfcpp::R_PPC64_GOT16_DS: |
5952 | case elfcpp::R_PPC64_GOT16_LO_DS: | |
95a2c8d6 RS |
5953 | case elfcpp::R_PPC64_TOC16: |
5954 | case elfcpp::R_PPC64_TOC16_LO: | |
5955 | case elfcpp::R_PPC64_TOC16_HI: | |
5956 | case elfcpp::R_PPC64_TOC16_HA: | |
5957 | case elfcpp::R_PPC64_TOC16_DS: | |
5958 | case elfcpp::R_PPC64_TOC16_LO_DS: | |
32d849b3 | 5959 | ref = Symbol::RELATIVE_REF; |
88b8e639 | 5960 | break; |
95a2c8d6 RS |
5961 | |
5962 | case elfcpp::R_POWERPC_GOT_TPREL16: | |
5963 | case elfcpp::R_POWERPC_TLS: | |
88b8e639 AM |
5964 | ref = Symbol::TLS_REF; |
5965 | break; | |
95a2c8d6 RS |
5966 | |
5967 | case elfcpp::R_POWERPC_COPY: | |
5968 | case elfcpp::R_POWERPC_GLOB_DAT: | |
5969 | case elfcpp::R_POWERPC_JMP_SLOT: | |
5970 | case elfcpp::R_POWERPC_RELATIVE: | |
5971 | case elfcpp::R_POWERPC_DTPMOD: | |
5972 | default: | |
5973 | // Not expected. We will give an error later. | |
88b8e639 | 5974 | break; |
95a2c8d6 | 5975 | } |
88b8e639 AM |
5976 | |
5977 | if (size == 64 && target->abiversion() < 2) | |
5978 | ref |= Symbol::FUNC_DESC_ABI; | |
5979 | return ref; | |
95a2c8d6 RS |
5980 | } |
5981 | ||
42cacb20 DE |
5982 | // Report an unsupported relocation against a local symbol. |
5983 | ||
5984 | template<int size, bool big_endian> | |
5985 | void | |
5986 | Target_powerpc<size, big_endian>::Scan::unsupported_reloc_local( | |
d83ce4e3 AM |
5987 | Sized_relobj_file<size, big_endian>* object, |
5988 | unsigned int r_type) | |
42cacb20 DE |
5989 | { |
5990 | gold_error(_("%s: unsupported reloc %u against local symbol"), | |
5991 | object->name().c_str(), r_type); | |
5992 | } | |
5993 | ||
5994 | // We are about to emit a dynamic relocation of type R_TYPE. If the | |
5995 | // dynamic linker does not support it, issue an error. | |
5996 | ||
5997 | template<int size, bool big_endian> | |
5998 | void | |
5999 | Target_powerpc<size, big_endian>::Scan::check_non_pic(Relobj* object, | |
6000 | unsigned int r_type) | |
6001 | { | |
6002 | gold_assert(r_type != elfcpp::R_POWERPC_NONE); | |
6003 | ||
6004 | // These are the relocation types supported by glibc for both 32-bit | |
6005 | // and 64-bit powerpc. | |
6006 | switch (r_type) | |
6007 | { | |
3ea0a085 | 6008 | case elfcpp::R_POWERPC_NONE: |
42cacb20 DE |
6009 | case elfcpp::R_POWERPC_RELATIVE: |
6010 | case elfcpp::R_POWERPC_GLOB_DAT: | |
6011 | case elfcpp::R_POWERPC_DTPMOD: | |
6012 | case elfcpp::R_POWERPC_DTPREL: | |
6013 | case elfcpp::R_POWERPC_TPREL: | |
6014 | case elfcpp::R_POWERPC_JMP_SLOT: | |
6015 | case elfcpp::R_POWERPC_COPY: | |
3ea0a085 | 6016 | case elfcpp::R_POWERPC_IRELATIVE: |
42cacb20 | 6017 | case elfcpp::R_POWERPC_ADDR32: |
3ea0a085 | 6018 | case elfcpp::R_POWERPC_UADDR32: |
42cacb20 | 6019 | case elfcpp::R_POWERPC_ADDR24: |
3ea0a085 AM |
6020 | case elfcpp::R_POWERPC_ADDR16: |
6021 | case elfcpp::R_POWERPC_UADDR16: | |
6022 | case elfcpp::R_POWERPC_ADDR16_LO: | |
6023 | case elfcpp::R_POWERPC_ADDR16_HI: | |
6024 | case elfcpp::R_POWERPC_ADDR16_HA: | |
6025 | case elfcpp::R_POWERPC_ADDR14: | |
6026 | case elfcpp::R_POWERPC_ADDR14_BRTAKEN: | |
6027 | case elfcpp::R_POWERPC_ADDR14_BRNTAKEN: | |
6028 | case elfcpp::R_POWERPC_REL32: | |
42cacb20 | 6029 | case elfcpp::R_POWERPC_REL24: |
3ea0a085 AM |
6030 | case elfcpp::R_POWERPC_TPREL16: |
6031 | case elfcpp::R_POWERPC_TPREL16_LO: | |
6032 | case elfcpp::R_POWERPC_TPREL16_HI: | |
6033 | case elfcpp::R_POWERPC_TPREL16_HA: | |
42cacb20 DE |
6034 | return; |
6035 | ||
6036 | default: | |
6037 | break; | |
6038 | } | |
6039 | ||
6040 | if (size == 64) | |
6041 | { | |
6042 | switch (r_type) | |
6043 | { | |
6044 | // These are the relocation types supported only on 64-bit. | |
6045 | case elfcpp::R_PPC64_ADDR64: | |
42cacb20 | 6046 | case elfcpp::R_PPC64_UADDR64: |
3ea0a085 | 6047 | case elfcpp::R_PPC64_JMP_IREL: |
42cacb20 | 6048 | case elfcpp::R_PPC64_ADDR16_DS: |
3ea0a085 | 6049 | case elfcpp::R_PPC64_ADDR16_LO_DS: |
f9c6b907 AM |
6050 | case elfcpp::R_PPC64_ADDR16_HIGH: |
6051 | case elfcpp::R_PPC64_ADDR16_HIGHA: | |
42cacb20 DE |
6052 | case elfcpp::R_PPC64_ADDR16_HIGHER: |
6053 | case elfcpp::R_PPC64_ADDR16_HIGHEST: | |
6054 | case elfcpp::R_PPC64_ADDR16_HIGHERA: | |
6055 | case elfcpp::R_PPC64_ADDR16_HIGHESTA: | |
42cacb20 | 6056 | case elfcpp::R_PPC64_REL64: |
3ea0a085 AM |
6057 | case elfcpp::R_POWERPC_ADDR30: |
6058 | case elfcpp::R_PPC64_TPREL16_DS: | |
6059 | case elfcpp::R_PPC64_TPREL16_LO_DS: | |
f9c6b907 AM |
6060 | case elfcpp::R_PPC64_TPREL16_HIGH: |
6061 | case elfcpp::R_PPC64_TPREL16_HIGHA: | |
3ea0a085 AM |
6062 | case elfcpp::R_PPC64_TPREL16_HIGHER: |
6063 | case elfcpp::R_PPC64_TPREL16_HIGHEST: | |
6064 | case elfcpp::R_PPC64_TPREL16_HIGHERA: | |
6065 | case elfcpp::R_PPC64_TPREL16_HIGHESTA: | |
42cacb20 DE |
6066 | return; |
6067 | ||
6068 | default: | |
6069 | break; | |
6070 | } | |
6071 | } | |
6072 | else | |
6073 | { | |
6074 | switch (r_type) | |
6075 | { | |
6076 | // These are the relocation types supported only on 32-bit. | |
3ea0a085 AM |
6077 | // ??? glibc ld.so doesn't need to support these. |
6078 | case elfcpp::R_POWERPC_DTPREL16: | |
6079 | case elfcpp::R_POWERPC_DTPREL16_LO: | |
6080 | case elfcpp::R_POWERPC_DTPREL16_HI: | |
6081 | case elfcpp::R_POWERPC_DTPREL16_HA: | |
6082 | return; | |
42cacb20 DE |
6083 | |
6084 | default: | |
6085 | break; | |
6086 | } | |
6087 | } | |
6088 | ||
6089 | // This prevents us from issuing more than one error per reloc | |
6090 | // section. But we can still wind up issuing more than one | |
6091 | // error per object file. | |
6092 | if (this->issued_non_pic_error_) | |
6093 | return; | |
33aea2fd | 6094 | gold_assert(parameters->options().output_is_position_independent()); |
42cacb20 DE |
6095 | object->error(_("requires unsupported dynamic reloc; " |
6096 | "recompile with -fPIC")); | |
6097 | this->issued_non_pic_error_ = true; | |
6098 | return; | |
6099 | } | |
6100 | ||
e5d5f5ed AM |
6101 | // Return whether we need to make a PLT entry for a relocation of the |
6102 | // given type against a STT_GNU_IFUNC symbol. | |
6103 | ||
6104 | template<int size, bool big_endian> | |
6105 | bool | |
6106 | Target_powerpc<size, big_endian>::Scan::reloc_needs_plt_for_ifunc( | |
9055360d | 6107 | Target_powerpc<size, big_endian>* target, |
e5d5f5ed | 6108 | Sized_relobj_file<size, big_endian>* object, |
b3ccdeb5 AM |
6109 | unsigned int r_type, |
6110 | bool report_err) | |
e5d5f5ed | 6111 | { |
c9824451 AM |
6112 | // In non-pic code any reference will resolve to the plt call stub |
6113 | // for the ifunc symbol. | |
9055360d AM |
6114 | if ((size == 32 || target->abiversion() >= 2) |
6115 | && !parameters->options().output_is_position_independent()) | |
c9824451 AM |
6116 | return true; |
6117 | ||
e5d5f5ed AM |
6118 | switch (r_type) |
6119 | { | |
b3ccdeb5 | 6120 | // Word size refs from data sections are OK, but don't need a PLT entry. |
e5d5f5ed AM |
6121 | case elfcpp::R_POWERPC_ADDR32: |
6122 | case elfcpp::R_POWERPC_UADDR32: | |
6123 | if (size == 32) | |
b3ccdeb5 | 6124 | return false; |
e5d5f5ed AM |
6125 | break; |
6126 | ||
6127 | case elfcpp::R_PPC64_ADDR64: | |
6128 | case elfcpp::R_PPC64_UADDR64: | |
6129 | if (size == 64) | |
b3ccdeb5 | 6130 | return false; |
e5d5f5ed AM |
6131 | break; |
6132 | ||
b3ccdeb5 | 6133 | // GOT refs are good, but also don't need a PLT entry. |
e5d5f5ed AM |
6134 | case elfcpp::R_POWERPC_GOT16: |
6135 | case elfcpp::R_POWERPC_GOT16_LO: | |
6136 | case elfcpp::R_POWERPC_GOT16_HI: | |
6137 | case elfcpp::R_POWERPC_GOT16_HA: | |
6138 | case elfcpp::R_PPC64_GOT16_DS: | |
6139 | case elfcpp::R_PPC64_GOT16_LO_DS: | |
b3ccdeb5 | 6140 | return false; |
e5d5f5ed | 6141 | |
b3ccdeb5 | 6142 | // Function calls are good, and these do need a PLT entry. |
e5d5f5ed AM |
6143 | case elfcpp::R_POWERPC_ADDR24: |
6144 | case elfcpp::R_POWERPC_ADDR14: | |
6145 | case elfcpp::R_POWERPC_ADDR14_BRTAKEN: | |
6146 | case elfcpp::R_POWERPC_ADDR14_BRNTAKEN: | |
6147 | case elfcpp::R_POWERPC_REL24: | |
6148 | case elfcpp::R_PPC_PLTREL24: | |
6149 | case elfcpp::R_POWERPC_REL14: | |
6150 | case elfcpp::R_POWERPC_REL14_BRTAKEN: | |
6151 | case elfcpp::R_POWERPC_REL14_BRNTAKEN: | |
6152 | return true; | |
6153 | ||
6154 | default: | |
6155 | break; | |
6156 | } | |
6157 | ||
6158 | // Anything else is a problem. | |
6159 | // If we are building a static executable, the libc startup function | |
6160 | // responsible for applying indirect function relocations is going | |
6161 | // to complain about the reloc type. | |
6162 | // If we are building a dynamic executable, we will have a text | |
6163 | // relocation. The dynamic loader will set the text segment | |
6164 | // writable and non-executable to apply text relocations. So we'll | |
6165 | // segfault when trying to run the indirection function to resolve | |
6166 | // the reloc. | |
b3ccdeb5 AM |
6167 | if (report_err) |
6168 | gold_error(_("%s: unsupported reloc %u for IFUNC symbol"), | |
e5d5f5ed AM |
6169 | object->name().c_str(), r_type); |
6170 | return false; | |
6171 | } | |
6172 | ||
5edad15d AM |
6173 | // Return TRUE iff INSN is one we expect on a _LO variety toc/got |
6174 | // reloc. | |
6175 | ||
6176 | static bool | |
6177 | ok_lo_toc_insn(uint32_t insn, unsigned int r_type) | |
6178 | { | |
6179 | return ((insn & (0x3f << 26)) == 12u << 26 /* addic */ | |
6180 | || (insn & (0x3f << 26)) == 14u << 26 /* addi */ | |
6181 | || (insn & (0x3f << 26)) == 32u << 26 /* lwz */ | |
6182 | || (insn & (0x3f << 26)) == 34u << 26 /* lbz */ | |
6183 | || (insn & (0x3f << 26)) == 36u << 26 /* stw */ | |
6184 | || (insn & (0x3f << 26)) == 38u << 26 /* stb */ | |
6185 | || (insn & (0x3f << 26)) == 40u << 26 /* lhz */ | |
6186 | || (insn & (0x3f << 26)) == 42u << 26 /* lha */ | |
6187 | || (insn & (0x3f << 26)) == 44u << 26 /* sth */ | |
6188 | || (insn & (0x3f << 26)) == 46u << 26 /* lmw */ | |
6189 | || (insn & (0x3f << 26)) == 47u << 26 /* stmw */ | |
6190 | || (insn & (0x3f << 26)) == 48u << 26 /* lfs */ | |
6191 | || (insn & (0x3f << 26)) == 50u << 26 /* lfd */ | |
6192 | || (insn & (0x3f << 26)) == 52u << 26 /* stfs */ | |
6193 | || (insn & (0x3f << 26)) == 54u << 26 /* stfd */ | |
6194 | || (insn & (0x3f << 26)) == 56u << 26 /* lq,lfq */ | |
6195 | || ((insn & (0x3f << 26)) == 57u << 26 /* lxsd,lxssp,lfdp */ | |
6196 | /* Exclude lfqu by testing reloc. If relocs are ever | |
6197 | defined for the reduced D field in psq_lu then those | |
6198 | will need testing too. */ | |
6199 | && r_type != elfcpp::R_PPC64_TOC16_LO | |
6200 | && r_type != elfcpp::R_POWERPC_GOT16_LO) | |
6201 | || ((insn & (0x3f << 26)) == 58u << 26 /* ld,lwa */ | |
6202 | && (insn & 1) == 0) | |
6203 | || (insn & (0x3f << 26)) == 60u << 26 /* stfq */ | |
6204 | || ((insn & (0x3f << 26)) == 61u << 26 /* lxv,stx{v,sd,ssp},stfdp */ | |
6205 | /* Exclude stfqu. psq_stu as above for psq_lu. */ | |
6206 | && r_type != elfcpp::R_PPC64_TOC16_LO | |
6207 | && r_type != elfcpp::R_POWERPC_GOT16_LO) | |
6208 | || ((insn & (0x3f << 26)) == 62u << 26 /* std,stq */ | |
6209 | && (insn & 1) == 0)); | |
6210 | } | |
6211 | ||
42cacb20 DE |
6212 | // Scan a relocation for a local symbol. |
6213 | ||
6214 | template<int size, bool big_endian> | |
6215 | inline void | |
6216 | Target_powerpc<size, big_endian>::Scan::local( | |
d83ce4e3 AM |
6217 | Symbol_table* symtab, |
6218 | Layout* layout, | |
6219 | Target_powerpc<size, big_endian>* target, | |
6220 | Sized_relobj_file<size, big_endian>* object, | |
6221 | unsigned int data_shndx, | |
6222 | Output_section* output_section, | |
6223 | const elfcpp::Rela<size, big_endian>& reloc, | |
6224 | unsigned int r_type, | |
e5d5f5ed | 6225 | const elfcpp::Sym<size, big_endian>& lsym, |
bfdfa4cd | 6226 | bool is_discarded) |
42cacb20 | 6227 | { |
e3deeb9c AM |
6228 | this->maybe_skip_tls_get_addr_call(r_type, NULL); |
6229 | ||
6230 | if ((size == 64 && r_type == elfcpp::R_PPC64_TLSGD) | |
6231 | || (size == 32 && r_type == elfcpp::R_PPC_TLSGD)) | |
6232 | { | |
6233 | this->expect_tls_get_addr_call(); | |
6234 | const tls::Tls_optimization tls_type = target->optimize_tls_gd(true); | |
6235 | if (tls_type != tls::TLSOPT_NONE) | |
6236 | this->skip_next_tls_get_addr_call(); | |
6237 | } | |
6238 | else if ((size == 64 && r_type == elfcpp::R_PPC64_TLSLD) | |
6239 | || (size == 32 && r_type == elfcpp::R_PPC_TLSLD)) | |
6240 | { | |
6241 | this->expect_tls_get_addr_call(); | |
6242 | const tls::Tls_optimization tls_type = target->optimize_tls_ld(); | |
6243 | if (tls_type != tls::TLSOPT_NONE) | |
6244 | this->skip_next_tls_get_addr_call(); | |
6245 | } | |
6246 | ||
dd93cd0a AM |
6247 | Powerpc_relobj<size, big_endian>* ppc_object |
6248 | = static_cast<Powerpc_relobj<size, big_endian>*>(object); | |
6249 | ||
bfdfa4cd AM |
6250 | if (is_discarded) |
6251 | { | |
6252 | if (size == 64 | |
6253 | && data_shndx == ppc_object->opd_shndx() | |
6254 | && r_type == elfcpp::R_PPC64_ADDR64) | |
6255 | ppc_object->set_opd_discard(reloc.get_r_offset()); | |
6256 | return; | |
6257 | } | |
6258 | ||
e5d5f5ed AM |
6259 | // A local STT_GNU_IFUNC symbol may require a PLT entry. |
6260 | bool is_ifunc = lsym.get_st_type() == elfcpp::STT_GNU_IFUNC; | |
9055360d | 6261 | if (is_ifunc && this->reloc_needs_plt_for_ifunc(target, object, r_type, true)) |
40b469d7 | 6262 | { |
ec661b9d AM |
6263 | unsigned int r_sym = elfcpp::elf_r_sym<size>(reloc.get_r_info()); |
6264 | target->push_branch(ppc_object, data_shndx, reloc.get_r_offset(), | |
6265 | r_type, r_sym, reloc.get_r_addend()); | |
6266 | target->make_local_ifunc_plt_entry(symtab, layout, object, r_sym); | |
40b469d7 | 6267 | } |
e5d5f5ed | 6268 | |
42cacb20 DE |
6269 | switch (r_type) |
6270 | { | |
6271 | case elfcpp::R_POWERPC_NONE: | |
6272 | case elfcpp::R_POWERPC_GNU_VTINHERIT: | |
6273 | case elfcpp::R_POWERPC_GNU_VTENTRY: | |
7404fe1b | 6274 | case elfcpp::R_POWERPC_TLS: |
549dba71 | 6275 | case elfcpp::R_PPC64_ENTRY: |
dd93cd0a AM |
6276 | break; |
6277 | ||
6278 | case elfcpp::R_PPC64_TOC: | |
6279 | { | |
6280 | Output_data_got_powerpc<size, big_endian>* got | |
6281 | = target->got_section(symtab, layout); | |
6282 | if (parameters->options().output_is_position_independent()) | |
6283 | { | |
bfdfa4cd AM |
6284 | Address off = reloc.get_r_offset(); |
6285 | if (size == 64 | |
9055360d | 6286 | && target->abiversion() < 2 |
bfdfa4cd AM |
6287 | && data_shndx == ppc_object->opd_shndx() |
6288 | && ppc_object->get_opd_discard(off - 8)) | |
6289 | break; | |
6290 | ||
dd93cd0a | 6291 | Reloc_section* rela_dyn = target->rela_dyn_section(layout); |
bfdfa4cd | 6292 | Powerpc_relobj<size, big_endian>* symobj = ppc_object; |
dd93cd0a AM |
6293 | rela_dyn->add_output_section_relative(got->output_section(), |
6294 | elfcpp::R_POWERPC_RELATIVE, | |
6295 | output_section, | |
bfdfa4cd AM |
6296 | object, data_shndx, off, |
6297 | symobj->toc_base_offset()); | |
dd93cd0a AM |
6298 | } |
6299 | } | |
42cacb20 DE |
6300 | break; |
6301 | ||
6302 | case elfcpp::R_PPC64_ADDR64: | |
dd93cd0a | 6303 | case elfcpp::R_PPC64_UADDR64: |
42cacb20 | 6304 | case elfcpp::R_POWERPC_ADDR32: |
dd93cd0a AM |
6305 | case elfcpp::R_POWERPC_UADDR32: |
6306 | case elfcpp::R_POWERPC_ADDR24: | |
c9269dff | 6307 | case elfcpp::R_POWERPC_ADDR16: |
42cacb20 | 6308 | case elfcpp::R_POWERPC_ADDR16_LO: |
c9269dff AM |
6309 | case elfcpp::R_POWERPC_ADDR16_HI: |
6310 | case elfcpp::R_POWERPC_ADDR16_HA: | |
dd93cd0a | 6311 | case elfcpp::R_POWERPC_UADDR16: |
f9c6b907 AM |
6312 | case elfcpp::R_PPC64_ADDR16_HIGH: |
6313 | case elfcpp::R_PPC64_ADDR16_HIGHA: | |
dd93cd0a AM |
6314 | case elfcpp::R_PPC64_ADDR16_HIGHER: |
6315 | case elfcpp::R_PPC64_ADDR16_HIGHERA: | |
6316 | case elfcpp::R_PPC64_ADDR16_HIGHEST: | |
6317 | case elfcpp::R_PPC64_ADDR16_HIGHESTA: | |
6318 | case elfcpp::R_PPC64_ADDR16_DS: | |
6319 | case elfcpp::R_PPC64_ADDR16_LO_DS: | |
6320 | case elfcpp::R_POWERPC_ADDR14: | |
6321 | case elfcpp::R_POWERPC_ADDR14_BRTAKEN: | |
6322 | case elfcpp::R_POWERPC_ADDR14_BRNTAKEN: | |
42cacb20 DE |
6323 | // If building a shared library (or a position-independent |
6324 | // executable), we need to create a dynamic relocation for | |
6325 | // this location. | |
c9824451 | 6326 | if (parameters->options().output_is_position_independent() |
9055360d | 6327 | || (size == 64 && is_ifunc && target->abiversion() < 2)) |
2e702c99 | 6328 | { |
b3ccdeb5 AM |
6329 | Reloc_section* rela_dyn = target->rela_dyn_section(symtab, layout, |
6330 | is_ifunc); | |
1f98a074 | 6331 | unsigned int r_sym = elfcpp::elf_r_sym<size>(reloc.get_r_info()); |
dd93cd0a AM |
6332 | if ((size == 32 && r_type == elfcpp::R_POWERPC_ADDR32) |
6333 | || (size == 64 && r_type == elfcpp::R_PPC64_ADDR64)) | |
2e702c99 | 6334 | { |
b3ccdeb5 AM |
6335 | unsigned int dynrel = (is_ifunc ? elfcpp::R_POWERPC_IRELATIVE |
6336 | : elfcpp::R_POWERPC_RELATIVE); | |
e5d5f5ed | 6337 | rela_dyn->add_local_relative(object, r_sym, dynrel, |
dd93cd0a AM |
6338 | output_section, data_shndx, |
6339 | reloc.get_r_offset(), | |
c9824451 | 6340 | reloc.get_r_addend(), false); |
2e702c99 | 6341 | } |
1f98a074 | 6342 | else if (lsym.get_st_type() != elfcpp::STT_SECTION) |
2e702c99 | 6343 | { |
dd93cd0a | 6344 | check_non_pic(object, r_type); |
dd93cd0a AM |
6345 | rela_dyn->add_local(object, r_sym, r_type, output_section, |
6346 | data_shndx, reloc.get_r_offset(), | |
6347 | reloc.get_r_addend()); | |
2e702c99 | 6348 | } |
1f98a074 AM |
6349 | else |
6350 | { | |
6351 | gold_assert(lsym.get_st_value() == 0); | |
6352 | unsigned int shndx = lsym.get_st_shndx(); | |
6353 | bool is_ordinary; | |
6354 | shndx = object->adjust_sym_shndx(r_sym, shndx, | |
6355 | &is_ordinary); | |
6356 | if (!is_ordinary) | |
6357 | object->error(_("section symbol %u has bad shndx %u"), | |
6358 | r_sym, shndx); | |
6359 | else | |
6360 | rela_dyn->add_local_section(object, shndx, r_type, | |
6361 | output_section, data_shndx, | |
6362 | reloc.get_r_offset()); | |
6363 | } | |
2e702c99 | 6364 | } |
42cacb20 DE |
6365 | break; |
6366 | ||
6367 | case elfcpp::R_POWERPC_REL24: | |
c9824451 | 6368 | case elfcpp::R_PPC_PLTREL24: |
42cacb20 | 6369 | case elfcpp::R_PPC_LOCAL24PC: |
ec661b9d AM |
6370 | case elfcpp::R_POWERPC_REL14: |
6371 | case elfcpp::R_POWERPC_REL14_BRTAKEN: | |
6372 | case elfcpp::R_POWERPC_REL14_BRNTAKEN: | |
b3ccdeb5 | 6373 | if (!is_ifunc) |
0e123f69 AM |
6374 | { |
6375 | unsigned int r_sym = elfcpp::elf_r_sym<size>(reloc.get_r_info()); | |
6376 | target->push_branch(ppc_object, data_shndx, reloc.get_r_offset(), | |
6377 | r_type, r_sym, reloc.get_r_addend()); | |
6378 | } | |
ec661b9d AM |
6379 | break; |
6380 | ||
7e57d19e AM |
6381 | case elfcpp::R_PPC64_TOCSAVE: |
6382 | // R_PPC64_TOCSAVE follows a call instruction to indicate the | |
6383 | // caller has already saved r2 and thus a plt call stub need not | |
6384 | // save r2. | |
6385 | if (size == 64 | |
6386 | && target->mark_pltcall(ppc_object, data_shndx, | |
6387 | reloc.get_r_offset() - 4, symtab)) | |
6388 | { | |
6389 | unsigned int r_sym = elfcpp::elf_r_sym<size>(reloc.get_r_info()); | |
6390 | unsigned int shndx = lsym.get_st_shndx(); | |
6391 | bool is_ordinary; | |
6392 | shndx = object->adjust_sym_shndx(r_sym, shndx, &is_ordinary); | |
6393 | if (!is_ordinary) | |
6394 | object->error(_("tocsave symbol %u has bad shndx %u"), | |
6395 | r_sym, shndx); | |
6396 | else | |
6397 | target->add_tocsave(ppc_object, shndx, | |
6398 | lsym.get_st_value() + reloc.get_r_addend()); | |
6399 | } | |
6400 | break; | |
6401 | ||
ec661b9d AM |
6402 | case elfcpp::R_PPC64_REL64: |
6403 | case elfcpp::R_POWERPC_REL32: | |
dd93cd0a | 6404 | case elfcpp::R_POWERPC_REL16: |
6ce78956 | 6405 | case elfcpp::R_POWERPC_REL16_LO: |
dd93cd0a | 6406 | case elfcpp::R_POWERPC_REL16_HI: |
6ce78956 | 6407 | case elfcpp::R_POWERPC_REL16_HA: |
a680de9a | 6408 | case elfcpp::R_POWERPC_REL16DX_HA: |
dd93cd0a | 6409 | case elfcpp::R_POWERPC_SECTOFF: |
dd93cd0a | 6410 | case elfcpp::R_POWERPC_SECTOFF_LO: |
dd93cd0a | 6411 | case elfcpp::R_POWERPC_SECTOFF_HI: |
dd93cd0a | 6412 | case elfcpp::R_POWERPC_SECTOFF_HA: |
f9c6b907 AM |
6413 | case elfcpp::R_PPC64_SECTOFF_DS: |
6414 | case elfcpp::R_PPC64_SECTOFF_LO_DS: | |
6415 | case elfcpp::R_POWERPC_TPREL16: | |
6416 | case elfcpp::R_POWERPC_TPREL16_LO: | |
6417 | case elfcpp::R_POWERPC_TPREL16_HI: | |
dd93cd0a | 6418 | case elfcpp::R_POWERPC_TPREL16_HA: |
f9c6b907 AM |
6419 | case elfcpp::R_PPC64_TPREL16_DS: |
6420 | case elfcpp::R_PPC64_TPREL16_LO_DS: | |
6421 | case elfcpp::R_PPC64_TPREL16_HIGH: | |
6422 | case elfcpp::R_PPC64_TPREL16_HIGHA: | |
dd93cd0a | 6423 | case elfcpp::R_PPC64_TPREL16_HIGHER: |
dd93cd0a | 6424 | case elfcpp::R_PPC64_TPREL16_HIGHERA: |
dd93cd0a | 6425 | case elfcpp::R_PPC64_TPREL16_HIGHEST: |
dd93cd0a | 6426 | case elfcpp::R_PPC64_TPREL16_HIGHESTA: |
f9c6b907 AM |
6427 | case elfcpp::R_POWERPC_DTPREL16: |
6428 | case elfcpp::R_POWERPC_DTPREL16_LO: | |
6429 | case elfcpp::R_POWERPC_DTPREL16_HI: | |
6430 | case elfcpp::R_POWERPC_DTPREL16_HA: | |
dd93cd0a AM |
6431 | case elfcpp::R_PPC64_DTPREL16_DS: |
6432 | case elfcpp::R_PPC64_DTPREL16_LO_DS: | |
f9c6b907 AM |
6433 | case elfcpp::R_PPC64_DTPREL16_HIGH: |
6434 | case elfcpp::R_PPC64_DTPREL16_HIGHA: | |
6435 | case elfcpp::R_PPC64_DTPREL16_HIGHER: | |
6436 | case elfcpp::R_PPC64_DTPREL16_HIGHERA: | |
6437 | case elfcpp::R_PPC64_DTPREL16_HIGHEST: | |
6438 | case elfcpp::R_PPC64_DTPREL16_HIGHESTA: | |
dd93cd0a AM |
6439 | case elfcpp::R_PPC64_TLSGD: |
6440 | case elfcpp::R_PPC64_TLSLD: | |
45965137 | 6441 | case elfcpp::R_PPC64_ADDR64_LOCAL: |
42cacb20 DE |
6442 | break; |
6443 | ||
6444 | case elfcpp::R_POWERPC_GOT16: | |
6445 | case elfcpp::R_POWERPC_GOT16_LO: | |
6446 | case elfcpp::R_POWERPC_GOT16_HI: | |
6447 | case elfcpp::R_POWERPC_GOT16_HA: | |
dd93cd0a AM |
6448 | case elfcpp::R_PPC64_GOT16_DS: |
6449 | case elfcpp::R_PPC64_GOT16_LO_DS: | |
42cacb20 | 6450 | { |
c9269dff | 6451 | // The symbol requires a GOT entry. |
dd93cd0a AM |
6452 | Output_data_got_powerpc<size, big_endian>* got |
6453 | = target->got_section(symtab, layout); | |
6454 | unsigned int r_sym = elfcpp::elf_r_sym<size>(reloc.get_r_info()); | |
42cacb20 | 6455 | |
e5d5f5ed | 6456 | if (!parameters->options().output_is_position_independent()) |
42cacb20 | 6457 | { |
b01a4b04 AM |
6458 | if (is_ifunc |
6459 | && (size == 32 || target->abiversion() >= 2)) | |
e5d5f5ed AM |
6460 | got->add_local_plt(object, r_sym, GOT_TYPE_STANDARD); |
6461 | else | |
6462 | got->add_local(object, r_sym, GOT_TYPE_STANDARD); | |
6463 | } | |
6464 | else if (!object->local_has_got_offset(r_sym, GOT_TYPE_STANDARD)) | |
6465 | { | |
6466 | // If we are generating a shared object or a pie, this | |
6467 | // symbol's GOT entry will be set by a dynamic relocation. | |
6468 | unsigned int off; | |
6469 | off = got->add_constant(0); | |
6470 | object->set_local_got_offset(r_sym, GOT_TYPE_STANDARD, off); | |
42cacb20 | 6471 | |
b3ccdeb5 AM |
6472 | Reloc_section* rela_dyn = target->rela_dyn_section(symtab, layout, |
6473 | is_ifunc); | |
6474 | unsigned int dynrel = (is_ifunc ? elfcpp::R_POWERPC_IRELATIVE | |
6475 | : elfcpp::R_POWERPC_RELATIVE); | |
e5d5f5ed | 6476 | rela_dyn->add_local_relative(object, r_sym, dynrel, |
c9824451 | 6477 | got, off, 0, false); |
2e702c99 | 6478 | } |
42cacb20 DE |
6479 | } |
6480 | break; | |
6481 | ||
cf43a2fe AM |
6482 | case elfcpp::R_PPC64_TOC16: |
6483 | case elfcpp::R_PPC64_TOC16_LO: | |
6484 | case elfcpp::R_PPC64_TOC16_HI: | |
6485 | case elfcpp::R_PPC64_TOC16_HA: | |
6486 | case elfcpp::R_PPC64_TOC16_DS: | |
6487 | case elfcpp::R_PPC64_TOC16_LO_DS: | |
42cacb20 DE |
6488 | // We need a GOT section. |
6489 | target->got_section(symtab, layout); | |
6490 | break; | |
6491 | ||
dd93cd0a AM |
6492 | case elfcpp::R_POWERPC_GOT_TLSGD16: |
6493 | case elfcpp::R_POWERPC_GOT_TLSGD16_LO: | |
6494 | case elfcpp::R_POWERPC_GOT_TLSGD16_HI: | |
6495 | case elfcpp::R_POWERPC_GOT_TLSGD16_HA: | |
6496 | { | |
6497 | const tls::Tls_optimization tls_type = target->optimize_tls_gd(true); | |
6498 | if (tls_type == tls::TLSOPT_NONE) | |
6499 | { | |
6500 | Output_data_got_powerpc<size, big_endian>* got | |
6501 | = target->got_section(symtab, layout); | |
6502 | unsigned int r_sym = elfcpp::elf_r_sym<size>(reloc.get_r_info()); | |
bd73a62d AM |
6503 | Reloc_section* rela_dyn = target->rela_dyn_section(layout); |
6504 | got->add_local_tls_pair(object, r_sym, GOT_TYPE_TLSGD, | |
6505 | rela_dyn, elfcpp::R_POWERPC_DTPMOD); | |
dd93cd0a AM |
6506 | } |
6507 | else if (tls_type == tls::TLSOPT_TO_LE) | |
6508 | { | |
6509 | // no GOT relocs needed for Local Exec. | |
6510 | } | |
6511 | else | |
6512 | gold_unreachable(); | |
6513 | } | |
42cacb20 DE |
6514 | break; |
6515 | ||
dd93cd0a AM |
6516 | case elfcpp::R_POWERPC_GOT_TLSLD16: |
6517 | case elfcpp::R_POWERPC_GOT_TLSLD16_LO: | |
6518 | case elfcpp::R_POWERPC_GOT_TLSLD16_HI: | |
6519 | case elfcpp::R_POWERPC_GOT_TLSLD16_HA: | |
6520 | { | |
6521 | const tls::Tls_optimization tls_type = target->optimize_tls_ld(); | |
6522 | if (tls_type == tls::TLSOPT_NONE) | |
6523 | target->tlsld_got_offset(symtab, layout, object); | |
6524 | else if (tls_type == tls::TLSOPT_TO_LE) | |
6525 | { | |
6526 | // no GOT relocs needed for Local Exec. | |
7404fe1b AM |
6527 | if (parameters->options().emit_relocs()) |
6528 | { | |
6529 | Output_section* os = layout->tls_segment()->first_section(); | |
6530 | gold_assert(os != NULL); | |
6531 | os->set_needs_symtab_index(); | |
6532 | } | |
dd93cd0a AM |
6533 | } |
6534 | else | |
6535 | gold_unreachable(); | |
6536 | } | |
42cacb20 | 6537 | break; |
42cacb20 | 6538 | |
dd93cd0a AM |
6539 | case elfcpp::R_POWERPC_GOT_DTPREL16: |
6540 | case elfcpp::R_POWERPC_GOT_DTPREL16_LO: | |
6541 | case elfcpp::R_POWERPC_GOT_DTPREL16_HI: | |
6542 | case elfcpp::R_POWERPC_GOT_DTPREL16_HA: | |
6543 | { | |
6544 | Output_data_got_powerpc<size, big_endian>* got | |
6545 | = target->got_section(symtab, layout); | |
6546 | unsigned int r_sym = elfcpp::elf_r_sym<size>(reloc.get_r_info()); | |
bd73a62d | 6547 | got->add_local_tls(object, r_sym, GOT_TYPE_DTPREL); |
dd93cd0a AM |
6548 | } |
6549 | break; | |
42cacb20 | 6550 | |
dd93cd0a AM |
6551 | case elfcpp::R_POWERPC_GOT_TPREL16: |
6552 | case elfcpp::R_POWERPC_GOT_TPREL16_LO: | |
6553 | case elfcpp::R_POWERPC_GOT_TPREL16_HI: | |
6554 | case elfcpp::R_POWERPC_GOT_TPREL16_HA: | |
6555 | { | |
6556 | const tls::Tls_optimization tls_type = target->optimize_tls_ie(true); | |
6557 | if (tls_type == tls::TLSOPT_NONE) | |
6558 | { | |
dd93cd0a | 6559 | unsigned int r_sym = elfcpp::elf_r_sym<size>(reloc.get_r_info()); |
acc276d8 AM |
6560 | if (!object->local_has_got_offset(r_sym, GOT_TYPE_TPREL)) |
6561 | { | |
6562 | Output_data_got_powerpc<size, big_endian>* got | |
6563 | = target->got_section(symtab, layout); | |
6564 | unsigned int off = got->add_constant(0); | |
6565 | object->set_local_got_offset(r_sym, GOT_TYPE_TPREL, off); | |
6566 | ||
6567 | Reloc_section* rela_dyn = target->rela_dyn_section(layout); | |
6568 | rela_dyn->add_symbolless_local_addend(object, r_sym, | |
6569 | elfcpp::R_POWERPC_TPREL, | |
6570 | got, off, 0); | |
6571 | } | |
dd93cd0a AM |
6572 | } |
6573 | else if (tls_type == tls::TLSOPT_TO_LE) | |
6574 | { | |
6575 | // no GOT relocs needed for Local Exec. | |
6576 | } | |
6577 | else | |
6578 | gold_unreachable(); | |
6579 | } | |
6580 | break; | |
6581 | ||
6582 | default: | |
6583 | unsupported_reloc_local(object, r_type); | |
6584 | break; | |
6585 | } | |
d8f5a274 | 6586 | |
5edad15d AM |
6587 | if (size == 64 |
6588 | && parameters->options().toc_optimize()) | |
6589 | { | |
6590 | if (data_shndx == ppc_object->toc_shndx()) | |
6591 | { | |
6592 | bool ok = true; | |
6593 | if (r_type != elfcpp::R_PPC64_ADDR64 | |
6594 | || (is_ifunc && target->abiversion() < 2)) | |
6595 | ok = false; | |
6596 | else if (parameters->options().output_is_position_independent()) | |
6597 | { | |
6598 | if (is_ifunc) | |
6599 | ok = false; | |
6600 | else | |
6601 | { | |
6602 | unsigned int shndx = lsym.get_st_shndx(); | |
6603 | if (shndx >= elfcpp::SHN_LORESERVE | |
6604 | && shndx != elfcpp::SHN_XINDEX) | |
6605 | ok = false; | |
6606 | } | |
6607 | } | |
6608 | if (!ok) | |
6609 | ppc_object->set_no_toc_opt(reloc.get_r_offset()); | |
6610 | } | |
6611 | ||
6612 | enum {no_check, check_lo, check_ha} insn_check; | |
6613 | switch (r_type) | |
6614 | { | |
6615 | default: | |
6616 | insn_check = no_check; | |
6617 | break; | |
6618 | ||
6619 | case elfcpp::R_POWERPC_GOT_TLSLD16_HA: | |
6620 | case elfcpp::R_POWERPC_GOT_TLSGD16_HA: | |
6621 | case elfcpp::R_POWERPC_GOT_TPREL16_HA: | |
6622 | case elfcpp::R_POWERPC_GOT_DTPREL16_HA: | |
6623 | case elfcpp::R_POWERPC_GOT16_HA: | |
6624 | case elfcpp::R_PPC64_TOC16_HA: | |
6625 | insn_check = check_ha; | |
6626 | break; | |
6627 | ||
6628 | case elfcpp::R_POWERPC_GOT_TLSLD16_LO: | |
6629 | case elfcpp::R_POWERPC_GOT_TLSGD16_LO: | |
6630 | case elfcpp::R_POWERPC_GOT_TPREL16_LO: | |
6631 | case elfcpp::R_POWERPC_GOT_DTPREL16_LO: | |
6632 | case elfcpp::R_POWERPC_GOT16_LO: | |
6633 | case elfcpp::R_PPC64_GOT16_LO_DS: | |
6634 | case elfcpp::R_PPC64_TOC16_LO: | |
6635 | case elfcpp::R_PPC64_TOC16_LO_DS: | |
6636 | insn_check = check_lo; | |
6637 | break; | |
6638 | } | |
6639 | ||
6640 | section_size_type slen; | |
6641 | const unsigned char* view = NULL; | |
6642 | if (insn_check != no_check) | |
6643 | { | |
6644 | view = ppc_object->section_contents(data_shndx, &slen, false); | |
6645 | section_size_type off = | |
6646 | convert_to_section_size_type(reloc.get_r_offset()) & -4; | |
6647 | if (off < slen) | |
6648 | { | |
6649 | uint32_t insn = elfcpp::Swap<32, big_endian>::readval(view + off); | |
6650 | if (insn_check == check_lo | |
6651 | ? !ok_lo_toc_insn(insn, r_type) | |
6652 | : ((insn & ((0x3f << 26) | 0x1f << 16)) | |
6653 | != ((15u << 26) | (2 << 16)) /* addis rt,2,imm */)) | |
6654 | { | |
6655 | ppc_object->set_no_toc_opt(); | |
6656 | gold_warning(_("%s: toc optimization is not supported " | |
6657 | "for %#08x instruction"), | |
6658 | ppc_object->name().c_str(), insn); | |
6659 | } | |
6660 | } | |
6661 | } | |
6662 | ||
6663 | switch (r_type) | |
6664 | { | |
6665 | default: | |
6666 | break; | |
6667 | case elfcpp::R_PPC64_TOC16: | |
6668 | case elfcpp::R_PPC64_TOC16_LO: | |
6669 | case elfcpp::R_PPC64_TOC16_HI: | |
6670 | case elfcpp::R_PPC64_TOC16_HA: | |
6671 | case elfcpp::R_PPC64_TOC16_DS: | |
6672 | case elfcpp::R_PPC64_TOC16_LO_DS: | |
6673 | unsigned int shndx = lsym.get_st_shndx(); | |
6674 | unsigned int r_sym = elfcpp::elf_r_sym<size>(reloc.get_r_info()); | |
6675 | bool is_ordinary; | |
6676 | shndx = ppc_object->adjust_sym_shndx(r_sym, shndx, &is_ordinary); | |
6677 | if (is_ordinary && shndx == ppc_object->toc_shndx()) | |
6678 | { | |
6679 | Address dst_off = lsym.get_st_value() + reloc.get_r_offset(); | |
6680 | if (dst_off < ppc_object->section_size(shndx)) | |
6681 | { | |
6682 | bool ok = false; | |
6683 | if (r_type == elfcpp::R_PPC64_TOC16_HA) | |
6684 | ok = true; | |
6685 | else if (r_type == elfcpp::R_PPC64_TOC16_LO_DS) | |
6686 | { | |
6687 | // Need to check that the insn is a ld | |
6688 | if (!view) | |
6689 | view = ppc_object->section_contents(data_shndx, | |
6690 | &slen, | |
6691 | false); | |
6692 | section_size_type off = | |
6693 | (convert_to_section_size_type(reloc.get_r_offset()) | |
6694 | + (big_endian ? -2 : 3)); | |
6695 | if (off < slen | |
6696 | && (view[off] & (0x3f << 2)) == 58u << 2) | |
6697 | ok = true; | |
6698 | } | |
6699 | if (!ok) | |
6700 | ppc_object->set_no_toc_opt(dst_off); | |
6701 | } | |
6702 | } | |
6703 | break; | |
6704 | } | |
6705 | } | |
6706 | ||
f159cdb6 AM |
6707 | if (size == 32) |
6708 | { | |
6709 | switch (r_type) | |
6710 | { | |
6711 | case elfcpp::R_POWERPC_REL32: | |
6712 | if (ppc_object->got2_shndx() != 0 | |
6713 | && parameters->options().output_is_position_independent()) | |
6714 | { | |
6715 | unsigned int shndx = lsym.get_st_shndx(); | |
6716 | unsigned int r_sym = elfcpp::elf_r_sym<size>(reloc.get_r_info()); | |
6717 | bool is_ordinary; | |
6718 | shndx = ppc_object->adjust_sym_shndx(r_sym, shndx, &is_ordinary); | |
6719 | if (is_ordinary && shndx == ppc_object->got2_shndx() | |
6720 | && (ppc_object->section_flags(data_shndx) | |
6721 | & elfcpp::SHF_EXECINSTR) != 0) | |
6722 | gold_error(_("%s: unsupported -mbss-plt code"), | |
6723 | ppc_object->name().c_str()); | |
6724 | } | |
6725 | break; | |
6726 | default: | |
6727 | break; | |
6728 | } | |
6729 | } | |
6730 | ||
d8f5a274 AM |
6731 | switch (r_type) |
6732 | { | |
6733 | case elfcpp::R_POWERPC_GOT_TLSLD16: | |
6734 | case elfcpp::R_POWERPC_GOT_TLSGD16: | |
6735 | case elfcpp::R_POWERPC_GOT_TPREL16: | |
6736 | case elfcpp::R_POWERPC_GOT_DTPREL16: | |
6737 | case elfcpp::R_POWERPC_GOT16: | |
6738 | case elfcpp::R_PPC64_GOT16_DS: | |
6739 | case elfcpp::R_PPC64_TOC16: | |
6740 | case elfcpp::R_PPC64_TOC16_DS: | |
6741 | ppc_object->set_has_small_toc_reloc(); | |
6742 | default: | |
6743 | break; | |
6744 | } | |
dd93cd0a AM |
6745 | } |
6746 | ||
6747 | // Report an unsupported relocation against a global symbol. | |
6748 | ||
6749 | template<int size, bool big_endian> | |
6750 | void | |
6751 | Target_powerpc<size, big_endian>::Scan::unsupported_reloc_global( | |
6752 | Sized_relobj_file<size, big_endian>* object, | |
6753 | unsigned int r_type, | |
6754 | Symbol* gsym) | |
6755 | { | |
42cacb20 DE |
6756 | gold_error(_("%s: unsupported reloc %u against global symbol %s"), |
6757 | object->name().c_str(), r_type, gsym->demangled_name().c_str()); | |
6758 | } | |
6759 | ||
6760 | // Scan a relocation for a global symbol. | |
6761 | ||
6762 | template<int size, bool big_endian> | |
6763 | inline void | |
6764 | Target_powerpc<size, big_endian>::Scan::global( | |
d83ce4e3 AM |
6765 | Symbol_table* symtab, |
6766 | Layout* layout, | |
6767 | Target_powerpc<size, big_endian>* target, | |
6768 | Sized_relobj_file<size, big_endian>* object, | |
6769 | unsigned int data_shndx, | |
6770 | Output_section* output_section, | |
6771 | const elfcpp::Rela<size, big_endian>& reloc, | |
6772 | unsigned int r_type, | |
6773 | Symbol* gsym) | |
42cacb20 | 6774 | { |
e3deeb9c AM |
6775 | if (this->maybe_skip_tls_get_addr_call(r_type, gsym) == Track_tls::SKIP) |
6776 | return; | |
6777 | ||
6778 | if ((size == 64 && r_type == elfcpp::R_PPC64_TLSGD) | |
6779 | || (size == 32 && r_type == elfcpp::R_PPC_TLSGD)) | |
6780 | { | |
6781 | this->expect_tls_get_addr_call(); | |
6782 | const bool final = gsym->final_value_is_known(); | |
6783 | const tls::Tls_optimization tls_type = target->optimize_tls_gd(final); | |
6784 | if (tls_type != tls::TLSOPT_NONE) | |
6785 | this->skip_next_tls_get_addr_call(); | |
6786 | } | |
6787 | else if ((size == 64 && r_type == elfcpp::R_PPC64_TLSLD) | |
6788 | || (size == 32 && r_type == elfcpp::R_PPC_TLSLD)) | |
6789 | { | |
6790 | this->expect_tls_get_addr_call(); | |
6791 | const tls::Tls_optimization tls_type = target->optimize_tls_ld(); | |
6792 | if (tls_type != tls::TLSOPT_NONE) | |
6793 | this->skip_next_tls_get_addr_call(); | |
6794 | } | |
6795 | ||
dd93cd0a AM |
6796 | Powerpc_relobj<size, big_endian>* ppc_object |
6797 | = static_cast<Powerpc_relobj<size, big_endian>*>(object); | |
6798 | ||
e5d5f5ed | 6799 | // A STT_GNU_IFUNC symbol may require a PLT entry. |
b3ccdeb5 | 6800 | bool is_ifunc = gsym->type() == elfcpp::STT_GNU_IFUNC; |
9055360d AM |
6801 | bool pushed_ifunc = false; |
6802 | if (is_ifunc && this->reloc_needs_plt_for_ifunc(target, object, r_type, true)) | |
ec661b9d | 6803 | { |
0e123f69 | 6804 | unsigned int r_sym = elfcpp::elf_r_sym<size>(reloc.get_r_info()); |
ec661b9d | 6805 | target->push_branch(ppc_object, data_shndx, reloc.get_r_offset(), |
0e123f69 | 6806 | r_type, r_sym, reloc.get_r_addend()); |
ec661b9d | 6807 | target->make_plt_entry(symtab, layout, gsym); |
9055360d | 6808 | pushed_ifunc = true; |
ec661b9d | 6809 | } |
e5d5f5ed | 6810 | |
42cacb20 DE |
6811 | switch (r_type) |
6812 | { | |
6813 | case elfcpp::R_POWERPC_NONE: | |
6814 | case elfcpp::R_POWERPC_GNU_VTINHERIT: | |
6815 | case elfcpp::R_POWERPC_GNU_VTENTRY: | |
cf43a2fe | 6816 | case elfcpp::R_PPC_LOCAL24PC: |
7404fe1b | 6817 | case elfcpp::R_POWERPC_TLS: |
549dba71 | 6818 | case elfcpp::R_PPC64_ENTRY: |
dd93cd0a AM |
6819 | break; |
6820 | ||
6821 | case elfcpp::R_PPC64_TOC: | |
6822 | { | |
6823 | Output_data_got_powerpc<size, big_endian>* got | |
6824 | = target->got_section(symtab, layout); | |
6825 | if (parameters->options().output_is_position_independent()) | |
6826 | { | |
bfdfa4cd AM |
6827 | Address off = reloc.get_r_offset(); |
6828 | if (size == 64 | |
6829 | && data_shndx == ppc_object->opd_shndx() | |
6830 | && ppc_object->get_opd_discard(off - 8)) | |
6831 | break; | |
6832 | ||
dd93cd0a AM |
6833 | Reloc_section* rela_dyn = target->rela_dyn_section(layout); |
6834 | Powerpc_relobj<size, big_endian>* symobj = ppc_object; | |
6835 | if (data_shndx != ppc_object->opd_shndx()) | |
6836 | symobj = static_cast | |
6837 | <Powerpc_relobj<size, big_endian>*>(gsym->object()); | |
6838 | rela_dyn->add_output_section_relative(got->output_section(), | |
6839 | elfcpp::R_POWERPC_RELATIVE, | |
6840 | output_section, | |
bfdfa4cd | 6841 | object, data_shndx, off, |
dd93cd0a AM |
6842 | symobj->toc_base_offset()); |
6843 | } | |
6844 | } | |
42cacb20 DE |
6845 | break; |
6846 | ||
c9269dff | 6847 | case elfcpp::R_PPC64_ADDR64: |
bfdfa4cd | 6848 | if (size == 64 |
9055360d | 6849 | && target->abiversion() < 2 |
bfdfa4cd AM |
6850 | && data_shndx == ppc_object->opd_shndx() |
6851 | && (gsym->is_defined_in_discarded_section() | |
6852 | || gsym->object() != object)) | |
6853 | { | |
6854 | ppc_object->set_opd_discard(reloc.get_r_offset()); | |
6855 | break; | |
6856 | } | |
d8e90251 | 6857 | // Fall through. |
dd93cd0a | 6858 | case elfcpp::R_PPC64_UADDR64: |
c9269dff | 6859 | case elfcpp::R_POWERPC_ADDR32: |
dd93cd0a AM |
6860 | case elfcpp::R_POWERPC_UADDR32: |
6861 | case elfcpp::R_POWERPC_ADDR24: | |
42cacb20 DE |
6862 | case elfcpp::R_POWERPC_ADDR16: |
6863 | case elfcpp::R_POWERPC_ADDR16_LO: | |
6864 | case elfcpp::R_POWERPC_ADDR16_HI: | |
6865 | case elfcpp::R_POWERPC_ADDR16_HA: | |
dd93cd0a | 6866 | case elfcpp::R_POWERPC_UADDR16: |
f9c6b907 AM |
6867 | case elfcpp::R_PPC64_ADDR16_HIGH: |
6868 | case elfcpp::R_PPC64_ADDR16_HIGHA: | |
dd93cd0a AM |
6869 | case elfcpp::R_PPC64_ADDR16_HIGHER: |
6870 | case elfcpp::R_PPC64_ADDR16_HIGHERA: | |
6871 | case elfcpp::R_PPC64_ADDR16_HIGHEST: | |
6872 | case elfcpp::R_PPC64_ADDR16_HIGHESTA: | |
6873 | case elfcpp::R_PPC64_ADDR16_DS: | |
6874 | case elfcpp::R_PPC64_ADDR16_LO_DS: | |
6875 | case elfcpp::R_POWERPC_ADDR14: | |
6876 | case elfcpp::R_POWERPC_ADDR14_BRTAKEN: | |
6877 | case elfcpp::R_POWERPC_ADDR14_BRNTAKEN: | |
42cacb20 | 6878 | { |
c9269dff AM |
6879 | // Make a PLT entry if necessary. |
6880 | if (gsym->needs_plt_entry()) | |
6881 | { | |
9055360d AM |
6882 | // Since this is not a PC-relative relocation, we may be |
6883 | // taking the address of a function. In that case we need to | |
6884 | // set the entry in the dynamic symbol table to the address of | |
6885 | // the PLT call stub. | |
6886 | bool need_ifunc_plt = false; | |
6887 | if ((size == 32 || target->abiversion() >= 2) | |
6888 | && gsym->is_from_dynobj() | |
6889 | && !parameters->options().output_is_position_independent()) | |
6890 | { | |
6891 | gsym->set_needs_dynsym_value(); | |
6892 | need_ifunc_plt = true; | |
6893 | } | |
6894 | if (!is_ifunc || (!pushed_ifunc && need_ifunc_plt)) | |
b3ccdeb5 | 6895 | { |
0e123f69 | 6896 | unsigned int r_sym = elfcpp::elf_r_sym<size>(reloc.get_r_info()); |
b3ccdeb5 | 6897 | target->push_branch(ppc_object, data_shndx, |
0e123f69 | 6898 | reloc.get_r_offset(), r_type, r_sym, |
b3ccdeb5 AM |
6899 | reloc.get_r_addend()); |
6900 | target->make_plt_entry(symtab, layout, gsym); | |
6901 | } | |
c9269dff AM |
6902 | } |
6903 | // Make a dynamic relocation if necessary. | |
88b8e639 | 6904 | if (gsym->needs_dynamic_reloc(Scan::get_reference_flags(r_type, target)) |
9055360d | 6905 | || (size == 64 && is_ifunc && target->abiversion() < 2)) |
c9269dff | 6906 | { |
a82bef93 ST |
6907 | if (!parameters->options().output_is_position_independent() |
6908 | && gsym->may_need_copy_reloc()) | |
c9269dff AM |
6909 | { |
6910 | target->copy_reloc(symtab, layout, object, | |
6911 | data_shndx, output_section, gsym, reloc); | |
6912 | } | |
9055360d AM |
6913 | else if ((((size == 32 |
6914 | && r_type == elfcpp::R_POWERPC_ADDR32) | |
6915 | || (size == 64 | |
6916 | && r_type == elfcpp::R_PPC64_ADDR64 | |
6917 | && target->abiversion() >= 2)) | |
627b30b7 AM |
6918 | && gsym->can_use_relative_reloc(false) |
6919 | && !(gsym->visibility() == elfcpp::STV_PROTECTED | |
6920 | && parameters->options().shared())) | |
6921 | || (size == 64 | |
6922 | && r_type == elfcpp::R_PPC64_ADDR64 | |
9055360d | 6923 | && target->abiversion() < 2 |
627b30b7 AM |
6924 | && (gsym->can_use_relative_reloc(false) |
6925 | || data_shndx == ppc_object->opd_shndx()))) | |
2e702c99 | 6926 | { |
b3ccdeb5 AM |
6927 | Reloc_section* rela_dyn |
6928 | = target->rela_dyn_section(symtab, layout, is_ifunc); | |
6929 | unsigned int dynrel = (is_ifunc ? elfcpp::R_POWERPC_IRELATIVE | |
6930 | : elfcpp::R_POWERPC_RELATIVE); | |
e5d5f5ed AM |
6931 | rela_dyn->add_symbolless_global_addend( |
6932 | gsym, dynrel, output_section, object, data_shndx, | |
6933 | reloc.get_r_offset(), reloc.get_r_addend()); | |
2e702c99 RM |
6934 | } |
6935 | else | |
6936 | { | |
b3ccdeb5 AM |
6937 | Reloc_section* rela_dyn |
6938 | = target->rela_dyn_section(symtab, layout, is_ifunc); | |
42cacb20 | 6939 | check_non_pic(object, r_type); |
dd93cd0a AM |
6940 | rela_dyn->add_global(gsym, r_type, output_section, |
6941 | object, data_shndx, | |
6942 | reloc.get_r_offset(), | |
6943 | reloc.get_r_addend()); | |
5edad15d AM |
6944 | |
6945 | if (size == 64 | |
6946 | && parameters->options().toc_optimize() | |
6947 | && data_shndx == ppc_object->toc_shndx()) | |
6948 | ppc_object->set_no_toc_opt(reloc.get_r_offset()); | |
2e702c99 RM |
6949 | } |
6950 | } | |
42cacb20 DE |
6951 | } |
6952 | break; | |
6953 | ||
cf43a2fe | 6954 | case elfcpp::R_PPC_PLTREL24: |
42cacb20 | 6955 | case elfcpp::R_POWERPC_REL24: |
b3ccdeb5 AM |
6956 | if (!is_ifunc) |
6957 | { | |
0e123f69 | 6958 | unsigned int r_sym = elfcpp::elf_r_sym<size>(reloc.get_r_info()); |
b3ccdeb5 | 6959 | target->push_branch(ppc_object, data_shndx, reloc.get_r_offset(), |
0e123f69 | 6960 | r_type, r_sym, reloc.get_r_addend()); |
b3ccdeb5 AM |
6961 | if (gsym->needs_plt_entry() |
6962 | || (!gsym->final_value_is_known() | |
6963 | && (gsym->is_undefined() | |
6964 | || gsym->is_from_dynobj() | |
6965 | || gsym->is_preemptible()))) | |
6966 | target->make_plt_entry(symtab, layout, gsym); | |
6967 | } | |
d8e90251 | 6968 | // Fall through. |
42cacb20 | 6969 | |
3ea0a085 | 6970 | case elfcpp::R_PPC64_REL64: |
dd93cd0a | 6971 | case elfcpp::R_POWERPC_REL32: |
3ea0a085 | 6972 | // Make a dynamic relocation if necessary. |
88b8e639 | 6973 | if (gsym->needs_dynamic_reloc(Scan::get_reference_flags(r_type, target))) |
3ea0a085 | 6974 | { |
a82bef93 ST |
6975 | if (!parameters->options().output_is_position_independent() |
6976 | && gsym->may_need_copy_reloc()) | |
3ea0a085 AM |
6977 | { |
6978 | target->copy_reloc(symtab, layout, object, | |
6979 | data_shndx, output_section, gsym, | |
6980 | reloc); | |
6981 | } | |
6982 | else | |
6983 | { | |
b3ccdeb5 AM |
6984 | Reloc_section* rela_dyn |
6985 | = target->rela_dyn_section(symtab, layout, is_ifunc); | |
3ea0a085 AM |
6986 | check_non_pic(object, r_type); |
6987 | rela_dyn->add_global(gsym, r_type, output_section, object, | |
6988 | data_shndx, reloc.get_r_offset(), | |
6989 | reloc.get_r_addend()); | |
6990 | } | |
6991 | } | |
6992 | break; | |
6993 | ||
ec661b9d AM |
6994 | case elfcpp::R_POWERPC_REL14: |
6995 | case elfcpp::R_POWERPC_REL14_BRTAKEN: | |
6996 | case elfcpp::R_POWERPC_REL14_BRNTAKEN: | |
b3ccdeb5 | 6997 | if (!is_ifunc) |
0e123f69 AM |
6998 | { |
6999 | unsigned int r_sym = elfcpp::elf_r_sym<size>(reloc.get_r_info()); | |
7000 | target->push_branch(ppc_object, data_shndx, reloc.get_r_offset(), | |
7001 | r_type, r_sym, reloc.get_r_addend()); | |
7002 | } | |
ec661b9d AM |
7003 | break; |
7004 | ||
7e57d19e AM |
7005 | case elfcpp::R_PPC64_TOCSAVE: |
7006 | // R_PPC64_TOCSAVE follows a call instruction to indicate the | |
7007 | // caller has already saved r2 and thus a plt call stub need not | |
7008 | // save r2. | |
7009 | if (size == 64 | |
7010 | && target->mark_pltcall(ppc_object, data_shndx, | |
7011 | reloc.get_r_offset() - 4, symtab)) | |
7012 | { | |
7013 | unsigned int r_sym = elfcpp::elf_r_sym<size>(reloc.get_r_info()); | |
7014 | bool is_ordinary; | |
7015 | unsigned int shndx = gsym->shndx(&is_ordinary); | |
7016 | if (!is_ordinary) | |
7017 | object->error(_("tocsave symbol %u has bad shndx %u"), | |
7018 | r_sym, shndx); | |
7019 | else | |
7020 | { | |
7021 | Sized_symbol<size>* sym = symtab->get_sized_symbol<size>(gsym); | |
7022 | target->add_tocsave(ppc_object, shndx, | |
7023 | sym->value() + reloc.get_r_addend()); | |
7024 | } | |
7025 | } | |
7026 | break; | |
7027 | ||
6ce78956 AM |
7028 | case elfcpp::R_POWERPC_REL16: |
7029 | case elfcpp::R_POWERPC_REL16_LO: | |
7030 | case elfcpp::R_POWERPC_REL16_HI: | |
7031 | case elfcpp::R_POWERPC_REL16_HA: | |
a680de9a | 7032 | case elfcpp::R_POWERPC_REL16DX_HA: |
dd93cd0a | 7033 | case elfcpp::R_POWERPC_SECTOFF: |
dd93cd0a | 7034 | case elfcpp::R_POWERPC_SECTOFF_LO: |
dd93cd0a | 7035 | case elfcpp::R_POWERPC_SECTOFF_HI: |
dd93cd0a | 7036 | case elfcpp::R_POWERPC_SECTOFF_HA: |
f9c6b907 AM |
7037 | case elfcpp::R_PPC64_SECTOFF_DS: |
7038 | case elfcpp::R_PPC64_SECTOFF_LO_DS: | |
7039 | case elfcpp::R_POWERPC_TPREL16: | |
7040 | case elfcpp::R_POWERPC_TPREL16_LO: | |
7041 | case elfcpp::R_POWERPC_TPREL16_HI: | |
dd93cd0a | 7042 | case elfcpp::R_POWERPC_TPREL16_HA: |
f9c6b907 AM |
7043 | case elfcpp::R_PPC64_TPREL16_DS: |
7044 | case elfcpp::R_PPC64_TPREL16_LO_DS: | |
7045 | case elfcpp::R_PPC64_TPREL16_HIGH: | |
7046 | case elfcpp::R_PPC64_TPREL16_HIGHA: | |
dd93cd0a | 7047 | case elfcpp::R_PPC64_TPREL16_HIGHER: |
dd93cd0a | 7048 | case elfcpp::R_PPC64_TPREL16_HIGHERA: |
dd93cd0a | 7049 | case elfcpp::R_PPC64_TPREL16_HIGHEST: |
dd93cd0a | 7050 | case elfcpp::R_PPC64_TPREL16_HIGHESTA: |
f9c6b907 AM |
7051 | case elfcpp::R_POWERPC_DTPREL16: |
7052 | case elfcpp::R_POWERPC_DTPREL16_LO: | |
7053 | case elfcpp::R_POWERPC_DTPREL16_HI: | |
7054 | case elfcpp::R_POWERPC_DTPREL16_HA: | |
dd93cd0a AM |
7055 | case elfcpp::R_PPC64_DTPREL16_DS: |
7056 | case elfcpp::R_PPC64_DTPREL16_LO_DS: | |
f9c6b907 AM |
7057 | case elfcpp::R_PPC64_DTPREL16_HIGH: |
7058 | case elfcpp::R_PPC64_DTPREL16_HIGHA: | |
7059 | case elfcpp::R_PPC64_DTPREL16_HIGHER: | |
7060 | case elfcpp::R_PPC64_DTPREL16_HIGHERA: | |
7061 | case elfcpp::R_PPC64_DTPREL16_HIGHEST: | |
7062 | case elfcpp::R_PPC64_DTPREL16_HIGHESTA: | |
dd93cd0a AM |
7063 | case elfcpp::R_PPC64_TLSGD: |
7064 | case elfcpp::R_PPC64_TLSLD: | |
45965137 | 7065 | case elfcpp::R_PPC64_ADDR64_LOCAL: |
cf43a2fe AM |
7066 | break; |
7067 | ||
42cacb20 DE |
7068 | case elfcpp::R_POWERPC_GOT16: |
7069 | case elfcpp::R_POWERPC_GOT16_LO: | |
7070 | case elfcpp::R_POWERPC_GOT16_HI: | |
7071 | case elfcpp::R_POWERPC_GOT16_HA: | |
dd93cd0a AM |
7072 | case elfcpp::R_PPC64_GOT16_DS: |
7073 | case elfcpp::R_PPC64_GOT16_LO_DS: | |
42cacb20 | 7074 | { |
c9269dff AM |
7075 | // The symbol requires a GOT entry. |
7076 | Output_data_got_powerpc<size, big_endian>* got; | |
42cacb20 DE |
7077 | |
7078 | got = target->got_section(symtab, layout); | |
2e702c99 | 7079 | if (gsym->final_value_is_known()) |
2e702c99 | 7080 | { |
b01a4b04 AM |
7081 | if (is_ifunc |
7082 | && (size == 32 || target->abiversion() >= 2)) | |
e5d5f5ed AM |
7083 | got->add_global_plt(gsym, GOT_TYPE_STANDARD); |
7084 | else | |
7085 | got->add_global(gsym, GOT_TYPE_STANDARD); | |
7086 | } | |
7087 | else if (!gsym->has_got_offset(GOT_TYPE_STANDARD)) | |
7088 | { | |
7089 | // If we are generating a shared object or a pie, this | |
7090 | // symbol's GOT entry will be set by a dynamic relocation. | |
7091 | unsigned int off = got->add_constant(0); | |
7092 | gsym->set_got_offset(GOT_TYPE_STANDARD, off); | |
7093 | ||
b3ccdeb5 AM |
7094 | Reloc_section* rela_dyn |
7095 | = target->rela_dyn_section(symtab, layout, is_ifunc); | |
7096 | ||
e5d5f5ed | 7097 | if (gsym->can_use_relative_reloc(false) |
9055360d AM |
7098 | && !((size == 32 |
7099 | || target->abiversion() >= 2) | |
e5d5f5ed AM |
7100 | && gsym->visibility() == elfcpp::STV_PROTECTED |
7101 | && parameters->options().shared())) | |
2e702c99 | 7102 | { |
b3ccdeb5 AM |
7103 | unsigned int dynrel = (is_ifunc ? elfcpp::R_POWERPC_IRELATIVE |
7104 | : elfcpp::R_POWERPC_RELATIVE); | |
e5d5f5ed AM |
7105 | rela_dyn->add_global_relative(gsym, dynrel, got, off, 0, false); |
7106 | } | |
7107 | else | |
7108 | { | |
7109 | unsigned int dynrel = elfcpp::R_POWERPC_GLOB_DAT; | |
7110 | rela_dyn->add_global(gsym, dynrel, got, off, 0); | |
42cacb20 | 7111 | } |
2e702c99 | 7112 | } |
42cacb20 DE |
7113 | } |
7114 | break; | |
7115 | ||
cf43a2fe AM |
7116 | case elfcpp::R_PPC64_TOC16: |
7117 | case elfcpp::R_PPC64_TOC16_LO: | |
7118 | case elfcpp::R_PPC64_TOC16_HI: | |
7119 | case elfcpp::R_PPC64_TOC16_HA: | |
7120 | case elfcpp::R_PPC64_TOC16_DS: | |
7121 | case elfcpp::R_PPC64_TOC16_LO_DS: | |
42cacb20 DE |
7122 | // We need a GOT section. |
7123 | target->got_section(symtab, layout); | |
7124 | break; | |
7125 | ||
dd93cd0a AM |
7126 | case elfcpp::R_POWERPC_GOT_TLSGD16: |
7127 | case elfcpp::R_POWERPC_GOT_TLSGD16_LO: | |
7128 | case elfcpp::R_POWERPC_GOT_TLSGD16_HI: | |
7129 | case elfcpp::R_POWERPC_GOT_TLSGD16_HA: | |
7130 | { | |
7131 | const bool final = gsym->final_value_is_known(); | |
7132 | const tls::Tls_optimization tls_type = target->optimize_tls_gd(final); | |
7133 | if (tls_type == tls::TLSOPT_NONE) | |
7134 | { | |
7135 | Output_data_got_powerpc<size, big_endian>* got | |
7136 | = target->got_section(symtab, layout); | |
b3ccdeb5 AM |
7137 | Reloc_section* rela_dyn = target->rela_dyn_section(layout); |
7138 | got->add_global_pair_with_rel(gsym, GOT_TYPE_TLSGD, rela_dyn, | |
dd93cd0a AM |
7139 | elfcpp::R_POWERPC_DTPMOD, |
7140 | elfcpp::R_POWERPC_DTPREL); | |
7141 | } | |
7142 | else if (tls_type == tls::TLSOPT_TO_IE) | |
7143 | { | |
acc276d8 AM |
7144 | if (!gsym->has_got_offset(GOT_TYPE_TPREL)) |
7145 | { | |
7146 | Output_data_got_powerpc<size, big_endian>* got | |
7147 | = target->got_section(symtab, layout); | |
7148 | Reloc_section* rela_dyn = target->rela_dyn_section(layout); | |
7149 | if (gsym->is_undefined() | |
7150 | || gsym->is_from_dynobj()) | |
7151 | { | |
7152 | got->add_global_with_rel(gsym, GOT_TYPE_TPREL, rela_dyn, | |
7153 | elfcpp::R_POWERPC_TPREL); | |
7154 | } | |
7155 | else | |
7156 | { | |
7157 | unsigned int off = got->add_constant(0); | |
7158 | gsym->set_got_offset(GOT_TYPE_TPREL, off); | |
7159 | unsigned int dynrel = elfcpp::R_POWERPC_TPREL; | |
7160 | rela_dyn->add_symbolless_global_addend(gsym, dynrel, | |
7161 | got, off, 0); | |
7162 | } | |
7163 | } | |
dd93cd0a AM |
7164 | } |
7165 | else if (tls_type == tls::TLSOPT_TO_LE) | |
7166 | { | |
7167 | // no GOT relocs needed for Local Exec. | |
7168 | } | |
7169 | else | |
7170 | gold_unreachable(); | |
7171 | } | |
42cacb20 DE |
7172 | break; |
7173 | ||
dd93cd0a AM |
7174 | case elfcpp::R_POWERPC_GOT_TLSLD16: |
7175 | case elfcpp::R_POWERPC_GOT_TLSLD16_LO: | |
7176 | case elfcpp::R_POWERPC_GOT_TLSLD16_HI: | |
7177 | case elfcpp::R_POWERPC_GOT_TLSLD16_HA: | |
7178 | { | |
7179 | const tls::Tls_optimization tls_type = target->optimize_tls_ld(); | |
7180 | if (tls_type == tls::TLSOPT_NONE) | |
7181 | target->tlsld_got_offset(symtab, layout, object); | |
7182 | else if (tls_type == tls::TLSOPT_TO_LE) | |
7183 | { | |
7184 | // no GOT relocs needed for Local Exec. | |
7404fe1b AM |
7185 | if (parameters->options().emit_relocs()) |
7186 | { | |
7187 | Output_section* os = layout->tls_segment()->first_section(); | |
7188 | gold_assert(os != NULL); | |
7189 | os->set_needs_symtab_index(); | |
7190 | } | |
dd93cd0a AM |
7191 | } |
7192 | else | |
7193 | gold_unreachable(); | |
7194 | } | |
7195 | break; | |
7196 | ||
7197 | case elfcpp::R_POWERPC_GOT_DTPREL16: | |
7198 | case elfcpp::R_POWERPC_GOT_DTPREL16_LO: | |
7199 | case elfcpp::R_POWERPC_GOT_DTPREL16_HI: | |
7200 | case elfcpp::R_POWERPC_GOT_DTPREL16_HA: | |
7201 | { | |
7202 | Output_data_got_powerpc<size, big_endian>* got | |
7203 | = target->got_section(symtab, layout); | |
bd73a62d AM |
7204 | if (!gsym->final_value_is_known() |
7205 | && (gsym->is_from_dynobj() | |
7206 | || gsym->is_undefined() | |
7207 | || gsym->is_preemptible())) | |
7208 | got->add_global_with_rel(gsym, GOT_TYPE_DTPREL, | |
7209 | target->rela_dyn_section(layout), | |
7210 | elfcpp::R_POWERPC_DTPREL); | |
7211 | else | |
7212 | got->add_global_tls(gsym, GOT_TYPE_DTPREL); | |
dd93cd0a AM |
7213 | } |
7214 | break; | |
7215 | ||
7216 | case elfcpp::R_POWERPC_GOT_TPREL16: | |
7217 | case elfcpp::R_POWERPC_GOT_TPREL16_LO: | |
7218 | case elfcpp::R_POWERPC_GOT_TPREL16_HI: | |
7219 | case elfcpp::R_POWERPC_GOT_TPREL16_HA: | |
7220 | { | |
7221 | const bool final = gsym->final_value_is_known(); | |
7222 | const tls::Tls_optimization tls_type = target->optimize_tls_ie(final); | |
7223 | if (tls_type == tls::TLSOPT_NONE) | |
7224 | { | |
acc276d8 AM |
7225 | if (!gsym->has_got_offset(GOT_TYPE_TPREL)) |
7226 | { | |
7227 | Output_data_got_powerpc<size, big_endian>* got | |
7228 | = target->got_section(symtab, layout); | |
7229 | Reloc_section* rela_dyn = target->rela_dyn_section(layout); | |
7230 | if (gsym->is_undefined() | |
7231 | || gsym->is_from_dynobj()) | |
7232 | { | |
7233 | got->add_global_with_rel(gsym, GOT_TYPE_TPREL, rela_dyn, | |
7234 | elfcpp::R_POWERPC_TPREL); | |
7235 | } | |
7236 | else | |
7237 | { | |
7238 | unsigned int off = got->add_constant(0); | |
7239 | gsym->set_got_offset(GOT_TYPE_TPREL, off); | |
7240 | unsigned int dynrel = elfcpp::R_POWERPC_TPREL; | |
7241 | rela_dyn->add_symbolless_global_addend(gsym, dynrel, | |
7242 | got, off, 0); | |
7243 | } | |
7244 | } | |
dd93cd0a AM |
7245 | } |
7246 | else if (tls_type == tls::TLSOPT_TO_LE) | |
7247 | { | |
7248 | // no GOT relocs needed for Local Exec. | |
7249 | } | |
7250 | else | |
7251 | gold_unreachable(); | |
7252 | } | |
42cacb20 DE |
7253 | break; |
7254 | ||
7255 | default: | |
7256 | unsupported_reloc_global(object, r_type, gsym); | |
7257 | break; | |
7258 | } | |
d8f5a274 | 7259 | |
5edad15d AM |
7260 | if (size == 64 |
7261 | && parameters->options().toc_optimize()) | |
7262 | { | |
7263 | if (data_shndx == ppc_object->toc_shndx()) | |
7264 | { | |
7265 | bool ok = true; | |
7266 | if (r_type != elfcpp::R_PPC64_ADDR64 | |
7267 | || (is_ifunc && target->abiversion() < 2)) | |
7268 | ok = false; | |
7269 | else if (parameters->options().output_is_position_independent() | |
7270 | && (is_ifunc || gsym->is_absolute() || gsym->is_undefined())) | |
7271 | ok = false; | |
7272 | if (!ok) | |
7273 | ppc_object->set_no_toc_opt(reloc.get_r_offset()); | |
7274 | } | |
7275 | ||
7276 | enum {no_check, check_lo, check_ha} insn_check; | |
7277 | switch (r_type) | |
7278 | { | |
7279 | default: | |
7280 | insn_check = no_check; | |
7281 | break; | |
7282 | ||
7283 | case elfcpp::R_POWERPC_GOT_TLSLD16_HA: | |
7284 | case elfcpp::R_POWERPC_GOT_TLSGD16_HA: | |
7285 | case elfcpp::R_POWERPC_GOT_TPREL16_HA: | |
7286 | case elfcpp::R_POWERPC_GOT_DTPREL16_HA: | |
7287 | case elfcpp::R_POWERPC_GOT16_HA: | |
7288 | case elfcpp::R_PPC64_TOC16_HA: | |
7289 | insn_check = check_ha; | |
7290 | break; | |
7291 | ||
7292 | case elfcpp::R_POWERPC_GOT_TLSLD16_LO: | |
7293 | case elfcpp::R_POWERPC_GOT_TLSGD16_LO: | |
7294 | case elfcpp::R_POWERPC_GOT_TPREL16_LO: | |
7295 | case elfcpp::R_POWERPC_GOT_DTPREL16_LO: | |
7296 | case elfcpp::R_POWERPC_GOT16_LO: | |
7297 | case elfcpp::R_PPC64_GOT16_LO_DS: | |
7298 | case elfcpp::R_PPC64_TOC16_LO: | |
7299 | case elfcpp::R_PPC64_TOC16_LO_DS: | |
7300 | insn_check = check_lo; | |
7301 | break; | |
7302 | } | |
7303 | ||
7304 | section_size_type slen; | |
7305 | const unsigned char* view = NULL; | |
7306 | if (insn_check != no_check) | |
7307 | { | |
7308 | view = ppc_object->section_contents(data_shndx, &slen, false); | |
7309 | section_size_type off = | |
7310 | convert_to_section_size_type(reloc.get_r_offset()) & -4; | |
7311 | if (off < slen) | |
7312 | { | |
7313 | uint32_t insn = elfcpp::Swap<32, big_endian>::readval(view + off); | |
7314 | if (insn_check == check_lo | |
7315 | ? !ok_lo_toc_insn(insn, r_type) | |
7316 | : ((insn & ((0x3f << 26) | 0x1f << 16)) | |
7317 | != ((15u << 26) | (2 << 16)) /* addis rt,2,imm */)) | |
7318 | { | |
7319 | ppc_object->set_no_toc_opt(); | |
7320 | gold_warning(_("%s: toc optimization is not supported " | |
7321 | "for %#08x instruction"), | |
7322 | ppc_object->name().c_str(), insn); | |
7323 | } | |
7324 | } | |
7325 | } | |
7326 | ||
7327 | switch (r_type) | |
7328 | { | |
7329 | default: | |
7330 | break; | |
7331 | case elfcpp::R_PPC64_TOC16: | |
7332 | case elfcpp::R_PPC64_TOC16_LO: | |
7333 | case elfcpp::R_PPC64_TOC16_HI: | |
7334 | case elfcpp::R_PPC64_TOC16_HA: | |
7335 | case elfcpp::R_PPC64_TOC16_DS: | |
7336 | case elfcpp::R_PPC64_TOC16_LO_DS: | |
7337 | if (gsym->source() == Symbol::FROM_OBJECT | |
7338 | && !gsym->object()->is_dynamic()) | |
7339 | { | |
7340 | Powerpc_relobj<size, big_endian>* sym_object | |
7341 | = static_cast<Powerpc_relobj<size, big_endian>*>(gsym->object()); | |
7342 | bool is_ordinary; | |
7343 | unsigned int shndx = gsym->shndx(&is_ordinary); | |
7344 | if (shndx == sym_object->toc_shndx()) | |
7345 | { | |
7346 | Sized_symbol<size>* sym = symtab->get_sized_symbol<size>(gsym); | |
7347 | Address dst_off = sym->value() + reloc.get_r_offset(); | |
7348 | if (dst_off < sym_object->section_size(shndx)) | |
7349 | { | |
7350 | bool ok = false; | |
7351 | if (r_type == elfcpp::R_PPC64_TOC16_HA) | |
7352 | ok = true; | |
7353 | else if (r_type == elfcpp::R_PPC64_TOC16_LO_DS) | |
7354 | { | |
7355 | // Need to check that the insn is a ld | |
7356 | if (!view) | |
7357 | view = ppc_object->section_contents(data_shndx, | |
7358 | &slen, | |
7359 | false); | |
7360 | section_size_type off = | |
7361 | (convert_to_section_size_type(reloc.get_r_offset()) | |
7362 | + (big_endian ? -2 : 3)); | |
7363 | if (off < slen | |
7364 | && (view[off] & (0x3f << 2)) == (58u << 2)) | |
7365 | ok = true; | |
7366 | } | |
7367 | if (!ok) | |
7368 | sym_object->set_no_toc_opt(dst_off); | |
7369 | } | |
7370 | } | |
7371 | } | |
7372 | break; | |
7373 | } | |
7374 | } | |
7375 | ||
f159cdb6 AM |
7376 | if (size == 32) |
7377 | { | |
7378 | switch (r_type) | |
7379 | { | |
7380 | case elfcpp::R_PPC_LOCAL24PC: | |
7381 | if (strcmp(gsym->name(), "_GLOBAL_OFFSET_TABLE_") == 0) | |
7382 | gold_error(_("%s: unsupported -mbss-plt code"), | |
7383 | ppc_object->name().c_str()); | |
7384 | break; | |
7385 | default: | |
7386 | break; | |
7387 | } | |
7388 | } | |
7389 | ||
d8f5a274 AM |
7390 | switch (r_type) |
7391 | { | |
7392 | case elfcpp::R_POWERPC_GOT_TLSLD16: | |
7393 | case elfcpp::R_POWERPC_GOT_TLSGD16: | |
7394 | case elfcpp::R_POWERPC_GOT_TPREL16: | |
7395 | case elfcpp::R_POWERPC_GOT_DTPREL16: | |
7396 | case elfcpp::R_POWERPC_GOT16: | |
7397 | case elfcpp::R_PPC64_GOT16_DS: | |
7398 | case elfcpp::R_PPC64_TOC16: | |
7399 | case elfcpp::R_PPC64_TOC16_DS: | |
7400 | ppc_object->set_has_small_toc_reloc(); | |
7401 | default: | |
7402 | break; | |
7403 | } | |
42cacb20 DE |
7404 | } |
7405 | ||
6d03d481 ST |
7406 | // Process relocations for gc. |
7407 | ||
7408 | template<int size, bool big_endian> | |
7409 | void | |
7410 | Target_powerpc<size, big_endian>::gc_process_relocs( | |
d83ce4e3 AM |
7411 | Symbol_table* symtab, |
7412 | Layout* layout, | |
7413 | Sized_relobj_file<size, big_endian>* object, | |
7414 | unsigned int data_shndx, | |
7415 | unsigned int, | |
7416 | const unsigned char* prelocs, | |
7417 | size_t reloc_count, | |
7418 | Output_section* output_section, | |
7419 | bool needs_special_offset_handling, | |
7420 | size_t local_symbol_count, | |
7421 | const unsigned char* plocal_symbols) | |
6d03d481 ST |
7422 | { |
7423 | typedef Target_powerpc<size, big_endian> Powerpc; | |
4d625b70 CC |
7424 | typedef gold::Default_classify_reloc<elfcpp::SHT_RELA, size, big_endian> |
7425 | Classify_reloc; | |
7426 | ||
e81fea4d AM |
7427 | Powerpc_relobj<size, big_endian>* ppc_object |
7428 | = static_cast<Powerpc_relobj<size, big_endian>*>(object); | |
7429 | if (size == 64) | |
7430 | ppc_object->set_opd_valid(); | |
7431 | if (size == 64 && data_shndx == ppc_object->opd_shndx()) | |
7432 | { | |
7433 | typename Powerpc_relobj<size, big_endian>::Access_from::iterator p; | |
7434 | for (p = ppc_object->access_from_map()->begin(); | |
7435 | p != ppc_object->access_from_map()->end(); | |
7436 | ++p) | |
7437 | { | |
7438 | Address dst_off = p->first; | |
7439 | unsigned int dst_indx = ppc_object->get_opd_ent(dst_off); | |
7440 | typename Powerpc_relobj<size, big_endian>::Section_refs::iterator s; | |
7441 | for (s = p->second.begin(); s != p->second.end(); ++s) | |
7442 | { | |
efc6fa12 | 7443 | Relobj* src_obj = s->first; |
e81fea4d AM |
7444 | unsigned int src_indx = s->second; |
7445 | symtab->gc()->add_reference(src_obj, src_indx, | |
7446 | ppc_object, dst_indx); | |
7447 | } | |
7448 | p->second.clear(); | |
7449 | } | |
7450 | ppc_object->access_from_map()->clear(); | |
c6de8ed4 | 7451 | ppc_object->process_gc_mark(symtab); |
e81fea4d AM |
7452 | // Don't look at .opd relocs as .opd will reference everything. |
7453 | return; | |
7454 | } | |
6d03d481 | 7455 | |
4d625b70 | 7456 | gold::gc_process_relocs<size, big_endian, Powerpc, Scan, Classify_reloc>( |
6d03d481 ST |
7457 | symtab, |
7458 | layout, | |
7459 | this, | |
7460 | object, | |
7461 | data_shndx, | |
7462 | prelocs, | |
7463 | reloc_count, | |
7464 | output_section, | |
7465 | needs_special_offset_handling, | |
7466 | local_symbol_count, | |
7467 | plocal_symbols); | |
7468 | } | |
7469 | ||
e81fea4d AM |
7470 | // Handle target specific gc actions when adding a gc reference from |
7471 | // SRC_OBJ, SRC_SHNDX to a location specified by DST_OBJ, DST_SHNDX | |
7472 | // and DST_OFF. For powerpc64, this adds a referenc to the code | |
7473 | // section of a function descriptor. | |
7474 | ||
7475 | template<int size, bool big_endian> | |
7476 | void | |
7477 | Target_powerpc<size, big_endian>::do_gc_add_reference( | |
7478 | Symbol_table* symtab, | |
efc6fa12 | 7479 | Relobj* src_obj, |
e81fea4d | 7480 | unsigned int src_shndx, |
efc6fa12 | 7481 | Relobj* dst_obj, |
e81fea4d AM |
7482 | unsigned int dst_shndx, |
7483 | Address dst_off) const | |
7484 | { | |
6c77229c AM |
7485 | if (size != 64 || dst_obj->is_dynamic()) |
7486 | return; | |
7487 | ||
e81fea4d AM |
7488 | Powerpc_relobj<size, big_endian>* ppc_object |
7489 | = static_cast<Powerpc_relobj<size, big_endian>*>(dst_obj); | |
a2d7bf59 | 7490 | if (dst_shndx != 0 && dst_shndx == ppc_object->opd_shndx()) |
e81fea4d AM |
7491 | { |
7492 | if (ppc_object->opd_valid()) | |
7493 | { | |
7494 | dst_shndx = ppc_object->get_opd_ent(dst_off); | |
7495 | symtab->gc()->add_reference(src_obj, src_shndx, dst_obj, dst_shndx); | |
7496 | } | |
7497 | else | |
7498 | { | |
7499 | // If we haven't run scan_opd_relocs, we must delay | |
7500 | // processing this function descriptor reference. | |
7501 | ppc_object->add_reference(src_obj, src_shndx, dst_off); | |
7502 | } | |
7503 | } | |
7504 | } | |
7505 | ||
7506 | // Add any special sections for this symbol to the gc work list. | |
7507 | // For powerpc64, this adds the code section of a function | |
7508 | // descriptor. | |
7509 | ||
7510 | template<int size, bool big_endian> | |
7511 | void | |
7512 | Target_powerpc<size, big_endian>::do_gc_mark_symbol( | |
7513 | Symbol_table* symtab, | |
7514 | Symbol* sym) const | |
7515 | { | |
7516 | if (size == 64) | |
7517 | { | |
7518 | Powerpc_relobj<size, big_endian>* ppc_object | |
7519 | = static_cast<Powerpc_relobj<size, big_endian>*>(sym->object()); | |
7520 | bool is_ordinary; | |
7521 | unsigned int shndx = sym->shndx(&is_ordinary); | |
a2d7bf59 | 7522 | if (is_ordinary && shndx != 0 && shndx == ppc_object->opd_shndx()) |
e81fea4d AM |
7523 | { |
7524 | Sized_symbol<size>* gsym = symtab->get_sized_symbol<size>(sym); | |
7525 | Address dst_off = gsym->value(); | |
c6de8ed4 AM |
7526 | if (ppc_object->opd_valid()) |
7527 | { | |
7528 | unsigned int dst_indx = ppc_object->get_opd_ent(dst_off); | |
4277535c RÁE |
7529 | symtab->gc()->worklist().push_back(Section_id(ppc_object, |
7530 | dst_indx)); | |
c6de8ed4 AM |
7531 | } |
7532 | else | |
7533 | ppc_object->add_gc_mark(dst_off); | |
e81fea4d AM |
7534 | } |
7535 | } | |
7536 | } | |
7537 | ||
dc3714f3 AM |
7538 | // For a symbol location in .opd, set LOC to the location of the |
7539 | // function entry. | |
7540 | ||
7541 | template<int size, bool big_endian> | |
7542 | void | |
7543 | Target_powerpc<size, big_endian>::do_function_location( | |
7544 | Symbol_location* loc) const | |
7545 | { | |
a2d7bf59 | 7546 | if (size == 64 && loc->shndx != 0) |
dc3714f3 AM |
7547 | { |
7548 | if (loc->object->is_dynamic()) | |
7549 | { | |
7550 | Powerpc_dynobj<size, big_endian>* ppc_object | |
7551 | = static_cast<Powerpc_dynobj<size, big_endian>*>(loc->object); | |
7552 | if (loc->shndx == ppc_object->opd_shndx()) | |
7553 | { | |
7554 | Address dest_off; | |
7555 | Address off = loc->offset - ppc_object->opd_address(); | |
7556 | loc->shndx = ppc_object->get_opd_ent(off, &dest_off); | |
7557 | loc->offset = dest_off; | |
7558 | } | |
7559 | } | |
7560 | else | |
7561 | { | |
7562 | const Powerpc_relobj<size, big_endian>* ppc_object | |
7563 | = static_cast<const Powerpc_relobj<size, big_endian>*>(loc->object); | |
7564 | if (loc->shndx == ppc_object->opd_shndx()) | |
7565 | { | |
7566 | Address dest_off; | |
7567 | loc->shndx = ppc_object->get_opd_ent(loc->offset, &dest_off); | |
7568 | loc->offset = dest_off; | |
7569 | } | |
7570 | } | |
7571 | } | |
7572 | } | |
7573 | ||
bbec1a5d AM |
7574 | // FNOFFSET in section SHNDX in OBJECT is the start of a function |
7575 | // compiled with -fsplit-stack. The function calls non-split-stack | |
7576 | // code. Change the function to ensure it has enough stack space to | |
7577 | // call some random function. | |
7578 | ||
7579 | template<int size, bool big_endian> | |
7580 | void | |
7581 | Target_powerpc<size, big_endian>::do_calls_non_split( | |
7582 | Relobj* object, | |
7583 | unsigned int shndx, | |
7584 | section_offset_type fnoffset, | |
7585 | section_size_type fnsize, | |
6e0813d3 CC |
7586 | const unsigned char* prelocs, |
7587 | size_t reloc_count, | |
bbec1a5d AM |
7588 | unsigned char* view, |
7589 | section_size_type view_size, | |
7590 | std::string* from, | |
7591 | std::string* to) const | |
7592 | { | |
7593 | // 32-bit not supported. | |
7594 | if (size == 32) | |
7595 | { | |
7596 | // warn | |
7597 | Target::do_calls_non_split(object, shndx, fnoffset, fnsize, | |
6e0813d3 CC |
7598 | prelocs, reloc_count, view, view_size, |
7599 | from, to); | |
bbec1a5d AM |
7600 | return; |
7601 | } | |
7602 | ||
7603 | // The function always starts with | |
7604 | // ld %r0,-0x7000-64(%r13) # tcbhead_t.__private_ss | |
7605 | // addis %r12,%r1,-allocate@ha | |
7606 | // addi %r12,%r12,-allocate@l | |
7607 | // cmpld %r12,%r0 | |
7608 | // but note that the addis or addi may be replaced with a nop | |
7609 | ||
7610 | unsigned char *entry = view + fnoffset; | |
7611 | uint32_t insn = elfcpp::Swap<32, big_endian>::readval(entry); | |
7612 | ||
7613 | if ((insn & 0xffff0000) == addis_2_12) | |
7614 | { | |
7615 | /* Skip ELFv2 global entry code. */ | |
7616 | entry += 8; | |
7617 | insn = elfcpp::Swap<32, big_endian>::readval(entry); | |
7618 | } | |
7619 | ||
7620 | unsigned char *pinsn = entry; | |
7621 | bool ok = false; | |
7622 | const uint32_t ld_private_ss = 0xe80d8fc0; | |
7623 | if (insn == ld_private_ss) | |
7624 | { | |
7625 | int32_t allocate = 0; | |
7626 | while (1) | |
7627 | { | |
7628 | pinsn += 4; | |
7629 | insn = elfcpp::Swap<32, big_endian>::readval(pinsn); | |
7630 | if ((insn & 0xffff0000) == addis_12_1) | |
7631 | allocate += (insn & 0xffff) << 16; | |
7632 | else if ((insn & 0xffff0000) == addi_12_1 | |
7633 | || (insn & 0xffff0000) == addi_12_12) | |
7634 | allocate += ((insn & 0xffff) ^ 0x8000) - 0x8000; | |
7635 | else if (insn != nop) | |
7636 | break; | |
7637 | } | |
7638 | if (insn == cmpld_7_12_0 && pinsn == entry + 12) | |
7639 | { | |
7640 | int extra = parameters->options().split_stack_adjust_size(); | |
7641 | allocate -= extra; | |
7642 | if (allocate >= 0 || extra < 0) | |
7643 | { | |
7644 | object->error(_("split-stack stack size overflow at " | |
7645 | "section %u offset %0zx"), | |
7646 | shndx, static_cast<size_t>(fnoffset)); | |
7647 | return; | |
7648 | } | |
7649 | pinsn = entry + 4; | |
7650 | insn = addis_12_1 | (((allocate + 0x8000) >> 16) & 0xffff); | |
7651 | if (insn != addis_12_1) | |
7652 | { | |
7653 | elfcpp::Swap<32, big_endian>::writeval(pinsn, insn); | |
7654 | pinsn += 4; | |
7655 | insn = addi_12_12 | (allocate & 0xffff); | |
7656 | if (insn != addi_12_12) | |
7657 | { | |
7658 | elfcpp::Swap<32, big_endian>::writeval(pinsn, insn); | |
7659 | pinsn += 4; | |
7660 | } | |
7661 | } | |
7662 | else | |
7663 | { | |
7664 | insn = addi_12_1 | (allocate & 0xffff); | |
7665 | elfcpp::Swap<32, big_endian>::writeval(pinsn, insn); | |
7666 | pinsn += 4; | |
7667 | } | |
7668 | if (pinsn != entry + 12) | |
7669 | elfcpp::Swap<32, big_endian>::writeval(pinsn, nop); | |
7670 | ||
7671 | ok = true; | |
7672 | } | |
7673 | } | |
7674 | ||
7675 | if (!ok) | |
7676 | { | |
7677 | if (!object->has_no_split_stack()) | |
7678 | object->error(_("failed to match split-stack sequence at " | |
7679 | "section %u offset %0zx"), | |
7680 | shndx, static_cast<size_t>(fnoffset)); | |
7681 | } | |
7682 | } | |
7683 | ||
42cacb20 DE |
7684 | // Scan relocations for a section. |
7685 | ||
7686 | template<int size, bool big_endian> | |
7687 | void | |
7688 | Target_powerpc<size, big_endian>::scan_relocs( | |
d83ce4e3 AM |
7689 | Symbol_table* symtab, |
7690 | Layout* layout, | |
7691 | Sized_relobj_file<size, big_endian>* object, | |
7692 | unsigned int data_shndx, | |
7693 | unsigned int sh_type, | |
7694 | const unsigned char* prelocs, | |
7695 | size_t reloc_count, | |
7696 | Output_section* output_section, | |
7697 | bool needs_special_offset_handling, | |
7698 | size_t local_symbol_count, | |
7699 | const unsigned char* plocal_symbols) | |
42cacb20 DE |
7700 | { |
7701 | typedef Target_powerpc<size, big_endian> Powerpc; | |
4d625b70 CC |
7702 | typedef gold::Default_classify_reloc<elfcpp::SHT_RELA, size, big_endian> |
7703 | Classify_reloc; | |
42cacb20 | 7704 | |
7ee7ff70 AM |
7705 | if (!this->plt_localentry0_init_) |
7706 | { | |
7707 | bool plt_localentry0 = false; | |
7708 | if (size == 64 | |
7709 | && this->abiversion() >= 2) | |
7710 | { | |
7711 | if (parameters->options().user_set_plt_localentry()) | |
7712 | plt_localentry0 = parameters->options().plt_localentry(); | |
d44c746a AM |
7713 | if (plt_localentry0 |
7714 | && symtab->lookup("GLIBC_2.26", NULL) == NULL) | |
7715 | gold_warning(_("--plt-localentry is especially dangerous without " | |
7716 | "ld.so support to detect ABI violations")); | |
7ee7ff70 AM |
7717 | } |
7718 | this->plt_localentry0_ = plt_localentry0; | |
7719 | this->plt_localentry0_init_ = true; | |
7720 | } | |
7721 | ||
42cacb20 DE |
7722 | if (sh_type == elfcpp::SHT_REL) |
7723 | { | |
7724 | gold_error(_("%s: unsupported REL reloc section"), | |
7725 | object->name().c_str()); | |
7726 | return; | |
7727 | } | |
7728 | ||
4d625b70 | 7729 | gold::scan_relocs<size, big_endian, Powerpc, Scan, Classify_reloc>( |
42cacb20 DE |
7730 | symtab, |
7731 | layout, | |
7732 | this, | |
7733 | object, | |
7734 | data_shndx, | |
7735 | prelocs, | |
7736 | reloc_count, | |
7737 | output_section, | |
7738 | needs_special_offset_handling, | |
7739 | local_symbol_count, | |
7740 | plocal_symbols); | |
7741 | } | |
7742 | ||
ec4dbad3 AM |
7743 | // Functor class for processing the global symbol table. |
7744 | // Removes symbols defined on discarded opd entries. | |
7745 | ||
7746 | template<bool big_endian> | |
7747 | class Global_symbol_visitor_opd | |
7748 | { | |
7749 | public: | |
7750 | Global_symbol_visitor_opd() | |
7751 | { } | |
7752 | ||
7753 | void | |
7754 | operator()(Sized_symbol<64>* sym) | |
7755 | { | |
7756 | if (sym->has_symtab_index() | |
7757 | || sym->source() != Symbol::FROM_OBJECT | |
7758 | || !sym->in_real_elf()) | |
7759 | return; | |
7760 | ||
6c77229c AM |
7761 | if (sym->object()->is_dynamic()) |
7762 | return; | |
7763 | ||
ec4dbad3 AM |
7764 | Powerpc_relobj<64, big_endian>* symobj |
7765 | = static_cast<Powerpc_relobj<64, big_endian>*>(sym->object()); | |
6c77229c | 7766 | if (symobj->opd_shndx() == 0) |
ec4dbad3 AM |
7767 | return; |
7768 | ||
7769 | bool is_ordinary; | |
7770 | unsigned int shndx = sym->shndx(&is_ordinary); | |
7771 | if (shndx == symobj->opd_shndx() | |
7772 | && symobj->get_opd_discard(sym->value())) | |
1611bc4a AM |
7773 | { |
7774 | sym->set_undefined(); | |
e3ee8ed4 | 7775 | sym->set_visibility(elfcpp::STV_DEFAULT); |
1611bc4a AM |
7776 | sym->set_is_defined_in_discarded_section(); |
7777 | sym->set_symtab_index(-1U); | |
7778 | } | |
ec4dbad3 AM |
7779 | } |
7780 | }; | |
7781 | ||
f3a0ed29 AM |
7782 | template<int size, bool big_endian> |
7783 | void | |
7784 | Target_powerpc<size, big_endian>::define_save_restore_funcs( | |
7785 | Layout* layout, | |
7786 | Symbol_table* symtab) | |
7787 | { | |
7788 | if (size == 64) | |
7789 | { | |
d49044c7 AM |
7790 | Output_data_save_res<size, big_endian>* savres |
7791 | = new Output_data_save_res<size, big_endian>(symtab); | |
7792 | this->savres_section_ = savres; | |
f3a0ed29 AM |
7793 | layout->add_output_section_data(".text", elfcpp::SHT_PROGBITS, |
7794 | elfcpp::SHF_ALLOC | elfcpp::SHF_EXECINSTR, | |
7795 | savres, ORDER_TEXT, false); | |
7796 | } | |
7797 | } | |
7798 | ||
d8f5a274 AM |
7799 | // Sort linker created .got section first (for the header), then input |
7800 | // sections belonging to files using small model code. | |
7801 | ||
7802 | template<bool big_endian> | |
7803 | class Sort_toc_sections | |
7804 | { | |
7805 | public: | |
7806 | bool | |
7807 | operator()(const Output_section::Input_section& is1, | |
7808 | const Output_section::Input_section& is2) const | |
7809 | { | |
7810 | if (!is1.is_input_section() && is2.is_input_section()) | |
7811 | return true; | |
7812 | bool small1 | |
7813 | = (is1.is_input_section() | |
7814 | && (static_cast<const Powerpc_relobj<64, big_endian>*>(is1.relobj()) | |
7815 | ->has_small_toc_reloc())); | |
7816 | bool small2 | |
7817 | = (is2.is_input_section() | |
7818 | && (static_cast<const Powerpc_relobj<64, big_endian>*>(is2.relobj()) | |
7819 | ->has_small_toc_reloc())); | |
7820 | return small1 && !small2; | |
7821 | } | |
7822 | }; | |
7823 | ||
42cacb20 DE |
7824 | // Finalize the sections. |
7825 | ||
7826 | template<int size, bool big_endian> | |
7827 | void | |
d5b40221 DK |
7828 | Target_powerpc<size, big_endian>::do_finalize_sections( |
7829 | Layout* layout, | |
f59f41f3 | 7830 | const Input_objects*, |
ec4dbad3 | 7831 | Symbol_table* symtab) |
42cacb20 | 7832 | { |
c9824451 AM |
7833 | if (parameters->doing_static_link()) |
7834 | { | |
7835 | // At least some versions of glibc elf-init.o have a strong | |
7836 | // reference to __rela_iplt marker syms. A weak ref would be | |
7837 | // better.. | |
7838 | if (this->iplt_ != NULL) | |
7839 | { | |
7840 | Reloc_section* rel = this->iplt_->rel_plt(); | |
7841 | symtab->define_in_output_data("__rela_iplt_start", NULL, | |
7842 | Symbol_table::PREDEFINED, rel, 0, 0, | |
7843 | elfcpp::STT_NOTYPE, elfcpp::STB_GLOBAL, | |
7844 | elfcpp::STV_HIDDEN, 0, false, true); | |
7845 | symtab->define_in_output_data("__rela_iplt_end", NULL, | |
7846 | Symbol_table::PREDEFINED, rel, 0, 0, | |
7847 | elfcpp::STT_NOTYPE, elfcpp::STB_GLOBAL, | |
7848 | elfcpp::STV_HIDDEN, 0, true, true); | |
7849 | } | |
7850 | else | |
7851 | { | |
7852 | symtab->define_as_constant("__rela_iplt_start", NULL, | |
7853 | Symbol_table::PREDEFINED, 0, 0, | |
7854 | elfcpp::STT_NOTYPE, elfcpp::STB_GLOBAL, | |
7855 | elfcpp::STV_HIDDEN, 0, true, false); | |
7856 | symtab->define_as_constant("__rela_iplt_end", NULL, | |
7857 | Symbol_table::PREDEFINED, 0, 0, | |
7858 | elfcpp::STT_NOTYPE, elfcpp::STB_GLOBAL, | |
7859 | elfcpp::STV_HIDDEN, 0, true, false); | |
7860 | } | |
7861 | } | |
7862 | ||
ec4dbad3 AM |
7863 | if (size == 64) |
7864 | { | |
7865 | typedef Global_symbol_visitor_opd<big_endian> Symbol_visitor; | |
7866 | symtab->for_all_symbols<64, Symbol_visitor>(Symbol_visitor()); | |
ec661b9d AM |
7867 | |
7868 | if (!parameters->options().relocatable()) | |
7869 | { | |
7870 | this->define_save_restore_funcs(layout, symtab); | |
7871 | ||
7872 | // Annoyingly, we need to make these sections now whether or | |
7873 | // not we need them. If we delay until do_relax then we | |
7874 | // need to mess with the relaxation machinery checkpointing. | |
7875 | this->got_section(symtab, layout); | |
7876 | this->make_brlt_section(layout); | |
d8f5a274 AM |
7877 | |
7878 | if (parameters->options().toc_sort()) | |
7879 | { | |
7880 | Output_section* os = this->got_->output_section(); | |
7881 | if (os != NULL && os->input_sections().size() > 1) | |
7882 | std::stable_sort(os->input_sections().begin(), | |
7883 | os->input_sections().end(), | |
7884 | Sort_toc_sections<big_endian>()); | |
7885 | } | |
ec661b9d | 7886 | } |
ec4dbad3 AM |
7887 | } |
7888 | ||
42cacb20 | 7889 | // Fill in some more dynamic tags. |
c9269dff | 7890 | Output_data_dynamic* odyn = layout->dynamic_data(); |
c9824451 | 7891 | if (odyn != NULL) |
cf43a2fe | 7892 | { |
c9824451 AM |
7893 | const Reloc_section* rel_plt = (this->plt_ == NULL |
7894 | ? NULL | |
7895 | : this->plt_->rel_plt()); | |
7896 | layout->add_target_dynamic_tags(false, this->plt_, rel_plt, | |
7897 | this->rela_dyn_, true, size == 32); | |
7898 | ||
7899 | if (size == 32) | |
dd93cd0a | 7900 | { |
c9824451 AM |
7901 | if (this->got_ != NULL) |
7902 | { | |
7903 | this->got_->finalize_data_size(); | |
7904 | odyn->add_section_plus_offset(elfcpp::DT_PPC_GOT, | |
7905 | this->got_, this->got_->g_o_t()); | |
7906 | } | |
dd93cd0a | 7907 | } |
c9824451 | 7908 | else |
dd93cd0a | 7909 | { |
c9824451 AM |
7910 | if (this->glink_ != NULL) |
7911 | { | |
7912 | this->glink_->finalize_data_size(); | |
7913 | odyn->add_section_plus_offset(elfcpp::DT_PPC64_GLINK, | |
7914 | this->glink_, | |
ec661b9d | 7915 | (this->glink_->pltresolve_size |
c9824451 AM |
7916 | - 32)); |
7917 | } | |
7ee7ff70 AM |
7918 | if (this->has_localentry0_) |
7919 | odyn->add_constant(elfcpp::DT_PPC64_OPT, | |
7920 | elfcpp::PPC64_OPT_LOCALENTRY); | |
dd93cd0a | 7921 | } |
c9269dff | 7922 | } |
cf43a2fe | 7923 | |
42cacb20 DE |
7924 | // Emit any relocs we saved in an attempt to avoid generating COPY |
7925 | // relocs. | |
7926 | if (this->copy_relocs_.any_saved_relocs()) | |
7927 | this->copy_relocs_.emit(this->rela_dyn_section(layout)); | |
7928 | } | |
7929 | ||
5edad15d AM |
7930 | // Emit any saved relocs, and mark toc entries using any of these |
7931 | // relocs as not optimizable. | |
aba6bc71 | 7932 | |
5edad15d AM |
7933 | template<int sh_type, int size, bool big_endian> |
7934 | void | |
7935 | Powerpc_copy_relocs<sh_type, size, big_endian>::emit( | |
7936 | Output_data_reloc<sh_type, true, size, big_endian>* reloc_section) | |
aba6bc71 | 7937 | { |
5edad15d AM |
7938 | if (size == 64 |
7939 | && parameters->options().toc_optimize()) | |
7940 | { | |
7941 | for (typename Copy_relocs<sh_type, size, big_endian>:: | |
7942 | Copy_reloc_entries::iterator p = this->entries_.begin(); | |
7943 | p != this->entries_.end(); | |
7944 | ++p) | |
7945 | { | |
7946 | typename Copy_relocs<sh_type, size, big_endian>::Copy_reloc_entry& | |
7947 | entry = *p; | |
7948 | ||
7949 | // If the symbol is no longer defined in a dynamic object, | |
7950 | // then we emitted a COPY relocation. If it is still | |
7951 | // dynamic then we'll need dynamic relocations and thus | |
7952 | // can't optimize toc entries. | |
7953 | if (entry.sym_->is_from_dynobj()) | |
7954 | { | |
7955 | Powerpc_relobj<size, big_endian>* ppc_object | |
7956 | = static_cast<Powerpc_relobj<size, big_endian>*>(entry.relobj_); | |
7957 | if (entry.shndx_ == ppc_object->toc_shndx()) | |
7958 | ppc_object->set_no_toc_opt(entry.address_); | |
7959 | } | |
7960 | } | |
7961 | } | |
7962 | ||
7963 | Copy_relocs<sh_type, size, big_endian>::emit(reloc_section); | |
aba6bc71 AM |
7964 | } |
7965 | ||
3ea0a085 AM |
7966 | // Return the value to use for a branch relocation. |
7967 | ||
7968 | template<int size, bool big_endian> | |
1611bc4a | 7969 | bool |
3ea0a085 | 7970 | Target_powerpc<size, big_endian>::symval_for_branch( |
6c77229c | 7971 | const Symbol_table* symtab, |
3ea0a085 AM |
7972 | const Sized_symbol<size>* gsym, |
7973 | Powerpc_relobj<size, big_endian>* object, | |
1611bc4a | 7974 | Address *value, |
3ea0a085 AM |
7975 | unsigned int *dest_shndx) |
7976 | { | |
9055360d AM |
7977 | if (size == 32 || this->abiversion() >= 2) |
7978 | gold_unreachable(); | |
3ea0a085 | 7979 | *dest_shndx = 0; |
3ea0a085 AM |
7980 | |
7981 | // If the symbol is defined in an opd section, ie. is a function | |
7982 | // descriptor, use the function descriptor code entry address | |
7983 | Powerpc_relobj<size, big_endian>* symobj = object; | |
f3a0ed29 | 7984 | if (gsym != NULL |
0e123f69 AM |
7985 | && (gsym->source() != Symbol::FROM_OBJECT |
7986 | || gsym->object()->is_dynamic())) | |
1611bc4a | 7987 | return true; |
3ea0a085 AM |
7988 | if (gsym != NULL) |
7989 | symobj = static_cast<Powerpc_relobj<size, big_endian>*>(gsym->object()); | |
7990 | unsigned int shndx = symobj->opd_shndx(); | |
7991 | if (shndx == 0) | |
1611bc4a | 7992 | return true; |
3ea0a085 | 7993 | Address opd_addr = symobj->get_output_section_offset(shndx); |
a2d7bf59 | 7994 | if (opd_addr == invalid_address) |
1611bc4a | 7995 | return true; |
c6905c28 | 7996 | opd_addr += symobj->output_section_address(shndx); |
1611bc4a | 7997 | if (*value >= opd_addr && *value < opd_addr + symobj->section_size(shndx)) |
3ea0a085 AM |
7998 | { |
7999 | Address sec_off; | |
1611bc4a | 8000 | *dest_shndx = symobj->get_opd_ent(*value - opd_addr, &sec_off); |
6c77229c AM |
8001 | if (symtab->is_section_folded(symobj, *dest_shndx)) |
8002 | { | |
8003 | Section_id folded | |
8004 | = symtab->icf()->get_folded_section(symobj, *dest_shndx); | |
8005 | symobj = static_cast<Powerpc_relobj<size, big_endian>*>(folded.first); | |
8006 | *dest_shndx = folded.second; | |
8007 | } | |
3ea0a085 | 8008 | Address sec_addr = symobj->get_output_section_offset(*dest_shndx); |
1611bc4a AM |
8009 | if (sec_addr == invalid_address) |
8010 | return false; | |
8011 | ||
3ea0a085 | 8012 | sec_addr += symobj->output_section(*dest_shndx)->address(); |
1611bc4a | 8013 | *value = sec_addr + sec_off; |
3ea0a085 | 8014 | } |
1611bc4a | 8015 | return true; |
3ea0a085 AM |
8016 | } |
8017 | ||
42cacb20 DE |
8018 | // Perform a relocation. |
8019 | ||
8020 | template<int size, bool big_endian> | |
8021 | inline bool | |
8022 | Target_powerpc<size, big_endian>::Relocate::relocate( | |
d83ce4e3 | 8023 | const Relocate_info<size, big_endian>* relinfo, |
91a65d2f | 8024 | unsigned int, |
d83ce4e3 AM |
8025 | Target_powerpc* target, |
8026 | Output_section* os, | |
8027 | size_t relnum, | |
91a65d2f | 8028 | const unsigned char* preloc, |
d83ce4e3 AM |
8029 | const Sized_symbol<size>* gsym, |
8030 | const Symbol_value<size>* psymval, | |
8031 | unsigned char* view, | |
c9269dff AM |
8032 | Address address, |
8033 | section_size_type view_size) | |
42cacb20 | 8034 | { |
0e804863 ILT |
8035 | if (view == NULL) |
8036 | return true; | |
8037 | ||
91a65d2f AM |
8038 | const elfcpp::Rela<size, big_endian> rela(preloc); |
8039 | unsigned int r_type = elfcpp::elf_r_type<size>(rela.get_r_info()); | |
e3deeb9c | 8040 | switch (this->maybe_skip_tls_get_addr_call(r_type, gsym)) |
dd93cd0a | 8041 | { |
e3deeb9c AM |
8042 | case Track_tls::NOT_EXPECTED: |
8043 | gold_error_at_location(relinfo, relnum, rela.get_r_offset(), | |
8044 | _("__tls_get_addr call lacks marker reloc")); | |
8045 | break; | |
8046 | case Track_tls::EXPECTED: | |
8047 | // We have already complained. | |
8048 | break; | |
8049 | case Track_tls::SKIP: | |
8050 | return true; | |
8051 | case Track_tls::NORMAL: | |
8052 | break; | |
dd93cd0a | 8053 | } |
dd93cd0a | 8054 | |
42cacb20 | 8055 | typedef Powerpc_relocate_functions<size, big_endian> Reloc; |
dd93cd0a | 8056 | typedef typename elfcpp::Swap<32, big_endian>::Valtype Insn; |
0e123f69 | 8057 | typedef typename elfcpp::Rela<size, big_endian> Reltype; |
dcfc7dd4 AM |
8058 | // Offset from start of insn to d-field reloc. |
8059 | const int d_offset = big_endian ? 2 : 0; | |
8060 | ||
3ea0a085 AM |
8061 | Powerpc_relobj<size, big_endian>* const object |
8062 | = static_cast<Powerpc_relobj<size, big_endian>*>(relinfo->object); | |
dd93cd0a | 8063 | Address value = 0; |
0cfb0717 | 8064 | bool has_stub_value = false; |
7ee7ff70 | 8065 | bool localentry0 = false; |
e5d5f5ed | 8066 | unsigned int r_sym = elfcpp::elf_r_sym<size>(rela.get_r_info()); |
b3ccdeb5 | 8067 | if ((gsym != NULL |
88b8e639 | 8068 | ? gsym->use_plt_offset(Scan::get_reference_flags(r_type, target)) |
b3ccdeb5 AM |
8069 | : object->local_has_plt_offset(r_sym)) |
8070 | && (!psymval->is_ifunc_symbol() | |
9055360d | 8071 | || Scan::reloc_needs_plt_for_ifunc(target, object, r_type, false))) |
dd93cd0a | 8072 | { |
9055360d AM |
8073 | if (size == 64 |
8074 | && gsym != NULL | |
8075 | && target->abiversion() >= 2 | |
8076 | && !parameters->options().output_is_position_independent() | |
8077 | && !is_branch_reloc(r_type)) | |
ec661b9d | 8078 | { |
faa2211d AM |
8079 | Address off = target->glink_section()->find_global_entry(gsym); |
8080 | if (off != invalid_address) | |
6ec65f28 AM |
8081 | { |
8082 | value = target->glink_section()->global_entry_address() + off; | |
8083 | has_stub_value = true; | |
8084 | } | |
ec661b9d | 8085 | } |
c9824451 | 8086 | else |
9055360d AM |
8087 | { |
8088 | Stub_table<size, big_endian>* stub_table | |
8089 | = object->stub_table(relinfo->data_shndx); | |
8090 | if (stub_table == NULL) | |
8091 | { | |
8092 | // This is a ref from a data section to an ifunc symbol. | |
8093 | if (target->stub_tables().size() != 0) | |
8094 | stub_table = target->stub_tables()[0]; | |
8095 | } | |
faa2211d AM |
8096 | if (stub_table != NULL) |
8097 | { | |
7e57d19e | 8098 | const typename Stub_table<size, big_endian>::Plt_stub_ent* ent; |
faa2211d | 8099 | if (gsym != NULL) |
7e57d19e | 8100 | ent = stub_table->find_plt_call_entry(object, gsym, r_type, |
faa2211d AM |
8101 | rela.get_r_addend()); |
8102 | else | |
7e57d19e | 8103 | ent = stub_table->find_plt_call_entry(object, r_sym, r_type, |
faa2211d | 8104 | rela.get_r_addend()); |
7e57d19e | 8105 | if (ent != NULL) |
faa2211d | 8106 | { |
7e57d19e AM |
8107 | value = stub_table->stub_address() + ent->off_; |
8108 | const int reloc_size = elfcpp::Elf_sizes<size>::rela_size; | |
8109 | elfcpp::Shdr<size, big_endian> shdr(relinfo->reloc_shdr); | |
8110 | size_t reloc_count = shdr.get_sh_size() / reloc_size; | |
8111 | if (size == 64 | |
8112 | && ent->r2save_ | |
8113 | && relnum + 1 < reloc_count) | |
8114 | { | |
8115 | Reltype next_rela(preloc + reloc_size); | |
8116 | if (elfcpp::elf_r_type<size>(next_rela.get_r_info()) | |
8117 | == elfcpp::R_PPC64_TOCSAVE | |
8118 | && next_rela.get_r_offset() == rela.get_r_offset() + 4) | |
8119 | value += 4; | |
8120 | } | |
7ee7ff70 | 8121 | localentry0 = ent->localentry0_; |
faa2211d AM |
8122 | has_stub_value = true; |
8123 | } | |
8124 | } | |
9055360d | 8125 | } |
faa2211d AM |
8126 | // We don't care too much about bogus debug references to |
8127 | // non-local functions, but otherwise there had better be a plt | |
8128 | // call stub or global entry stub as appropriate. | |
8129 | gold_assert(has_stub_value || !(os->flags() & elfcpp::SHF_ALLOC)); | |
dd93cd0a | 8130 | } |
cf43a2fe AM |
8131 | |
8132 | if (r_type == elfcpp::R_POWERPC_GOT16 | |
8133 | || r_type == elfcpp::R_POWERPC_GOT16_LO | |
8134 | || r_type == elfcpp::R_POWERPC_GOT16_HI | |
8135 | || r_type == elfcpp::R_POWERPC_GOT16_HA | |
8136 | || r_type == elfcpp::R_PPC64_GOT16_DS | |
8137 | || r_type == elfcpp::R_PPC64_GOT16_LO_DS) | |
42cacb20 | 8138 | { |
cf43a2fe AM |
8139 | if (gsym != NULL) |
8140 | { | |
8141 | gold_assert(gsym->has_got_offset(GOT_TYPE_STANDARD)); | |
8142 | value = gsym->got_offset(GOT_TYPE_STANDARD); | |
8143 | } | |
8144 | else | |
8145 | { | |
cf43a2fe AM |
8146 | gold_assert(object->local_has_got_offset(r_sym, GOT_TYPE_STANDARD)); |
8147 | value = object->local_got_offset(r_sym, GOT_TYPE_STANDARD); | |
8148 | } | |
dd93cd0a | 8149 | value -= target->got_section()->got_base_offset(object); |
cf43a2fe AM |
8150 | } |
8151 | else if (r_type == elfcpp::R_PPC64_TOC) | |
8152 | { | |
c9269dff | 8153 | value = (target->got_section()->output_section()->address() |
dd93cd0a | 8154 | + object->toc_base_offset()); |
cf43a2fe AM |
8155 | } |
8156 | else if (gsym != NULL | |
8157 | && (r_type == elfcpp::R_POWERPC_REL24 | |
8158 | || r_type == elfcpp::R_PPC_PLTREL24) | |
0cfb0717 | 8159 | && has_stub_value) |
cf43a2fe | 8160 | { |
c9269dff AM |
8161 | if (size == 64) |
8162 | { | |
8163 | typedef typename elfcpp::Swap<32, big_endian>::Valtype Valtype; | |
8164 | Valtype* wv = reinterpret_cast<Valtype*>(view); | |
7ee7ff70 AM |
8165 | bool can_plt_call = localentry0; |
8166 | if (!localentry0 && rela.get_r_offset() + 8 <= view_size) | |
c9269dff | 8167 | { |
3ea0a085 | 8168 | Valtype insn = elfcpp::Swap<32, big_endian>::readval(wv); |
c9269dff | 8169 | Valtype insn2 = elfcpp::Swap<32, big_endian>::readval(wv + 1); |
3ea0a085 AM |
8170 | if ((insn & 1) != 0 |
8171 | && (insn2 == nop | |
8172 | || insn2 == cror_15_15_15 || insn2 == cror_31_31_31)) | |
c9269dff | 8173 | { |
b4f7960d AM |
8174 | elfcpp::Swap<32, big_endian>:: |
8175 | writeval(wv + 1, ld_2_1 + target->stk_toc()); | |
c9269dff AM |
8176 | can_plt_call = true; |
8177 | } | |
8178 | } | |
8179 | if (!can_plt_call) | |
3ea0a085 AM |
8180 | { |
8181 | // If we don't have a branch and link followed by a nop, | |
8182 | // we can't go via the plt because there is no place to | |
8183 | // put a toc restoring instruction. | |
8184 | // Unless we know we won't be returning. | |
8185 | if (strcmp(gsym->name(), "__libc_start_main") == 0) | |
8186 | can_plt_call = true; | |
8187 | } | |
8188 | if (!can_plt_call) | |
8189 | { | |
ba8ca3e7 AM |
8190 | // g++ as of 20130507 emits self-calls without a |
8191 | // following nop. This is arguably wrong since we have | |
8192 | // conflicting information. On the one hand a global | |
8193 | // symbol and on the other a local call sequence, but | |
8194 | // don't error for this special case. | |
8195 | // It isn't possible to cheaply verify we have exactly | |
8196 | // such a call. Allow all calls to the same section. | |
3ea0a085 | 8197 | bool ok = false; |
c9824451 | 8198 | Address code = value; |
3ea0a085 AM |
8199 | if (gsym->source() == Symbol::FROM_OBJECT |
8200 | && gsym->object() == object) | |
8201 | { | |
9055360d AM |
8202 | unsigned int dest_shndx = 0; |
8203 | if (target->abiversion() < 2) | |
8204 | { | |
8205 | Address addend = rela.get_r_addend(); | |
1611bc4a AM |
8206 | code = psymval->value(object, addend); |
8207 | target->symval_for_branch(relinfo->symtab, gsym, object, | |
8208 | &code, &dest_shndx); | |
9055360d | 8209 | } |
3ea0a085 AM |
8210 | bool is_ordinary; |
8211 | if (dest_shndx == 0) | |
8212 | dest_shndx = gsym->shndx(&is_ordinary); | |
8213 | ok = dest_shndx == relinfo->data_shndx; | |
8214 | } | |
8215 | if (!ok) | |
c9824451 AM |
8216 | { |
8217 | gold_error_at_location(relinfo, relnum, rela.get_r_offset(), | |
8218 | _("call lacks nop, can't restore toc; " | |
8219 | "recompile with -fPIC")); | |
8220 | value = code; | |
8221 | } | |
3ea0a085 | 8222 | } |
c9269dff | 8223 | } |
cf43a2fe | 8224 | } |
dd93cd0a AM |
8225 | else if (r_type == elfcpp::R_POWERPC_GOT_TLSGD16 |
8226 | || r_type == elfcpp::R_POWERPC_GOT_TLSGD16_LO | |
8227 | || r_type == elfcpp::R_POWERPC_GOT_TLSGD16_HI | |
8228 | || r_type == elfcpp::R_POWERPC_GOT_TLSGD16_HA) | |
8229 | { | |
8230 | // First instruction of a global dynamic sequence, arg setup insn. | |
8231 | const bool final = gsym == NULL || gsym->final_value_is_known(); | |
8232 | const tls::Tls_optimization tls_type = target->optimize_tls_gd(final); | |
8233 | enum Got_type got_type = GOT_TYPE_STANDARD; | |
8234 | if (tls_type == tls::TLSOPT_NONE) | |
8235 | got_type = GOT_TYPE_TLSGD; | |
8236 | else if (tls_type == tls::TLSOPT_TO_IE) | |
8237 | got_type = GOT_TYPE_TPREL; | |
8238 | if (got_type != GOT_TYPE_STANDARD) | |
8239 | { | |
8240 | if (gsym != NULL) | |
8241 | { | |
8242 | gold_assert(gsym->has_got_offset(got_type)); | |
8243 | value = gsym->got_offset(got_type); | |
8244 | } | |
8245 | else | |
8246 | { | |
dd93cd0a AM |
8247 | gold_assert(object->local_has_got_offset(r_sym, got_type)); |
8248 | value = object->local_got_offset(r_sym, got_type); | |
8249 | } | |
8250 | value -= target->got_section()->got_base_offset(object); | |
8251 | } | |
8252 | if (tls_type == tls::TLSOPT_TO_IE) | |
8253 | { | |
8254 | if (r_type == elfcpp::R_POWERPC_GOT_TLSGD16 | |
8255 | || r_type == elfcpp::R_POWERPC_GOT_TLSGD16_LO) | |
8256 | { | |
dcfc7dd4 | 8257 | Insn* iview = reinterpret_cast<Insn*>(view - d_offset); |
dd93cd0a AM |
8258 | Insn insn = elfcpp::Swap<32, big_endian>::readval(iview); |
8259 | insn &= (1 << 26) - (1 << 16); // extract rt,ra from addi | |
8260 | if (size == 32) | |
8261 | insn |= 32 << 26; // lwz | |
8262 | else | |
8263 | insn |= 58 << 26; // ld | |
8264 | elfcpp::Swap<32, big_endian>::writeval(iview, insn); | |
8265 | } | |
8266 | r_type += (elfcpp::R_POWERPC_GOT_TPREL16 | |
8267 | - elfcpp::R_POWERPC_GOT_TLSGD16); | |
8268 | } | |
8269 | else if (tls_type == tls::TLSOPT_TO_LE) | |
8270 | { | |
8271 | if (r_type == elfcpp::R_POWERPC_GOT_TLSGD16 | |
8272 | || r_type == elfcpp::R_POWERPC_GOT_TLSGD16_LO) | |
8273 | { | |
dcfc7dd4 | 8274 | Insn* iview = reinterpret_cast<Insn*>(view - d_offset); |
0f81d3f0 AM |
8275 | Insn insn = elfcpp::Swap<32, big_endian>::readval(iview); |
8276 | insn &= (1 << 26) - (1 << 21); // extract rt | |
dd93cd0a | 8277 | if (size == 32) |
0f81d3f0 AM |
8278 | insn |= addis_0_2; |
8279 | else | |
8280 | insn |= addis_0_13; | |
dd93cd0a AM |
8281 | elfcpp::Swap<32, big_endian>::writeval(iview, insn); |
8282 | r_type = elfcpp::R_POWERPC_TPREL16_HA; | |
8283 | value = psymval->value(object, rela.get_r_addend()); | |
8284 | } | |
8285 | else | |
8286 | { | |
dcfc7dd4 | 8287 | Insn* iview = reinterpret_cast<Insn*>(view - d_offset); |
dd93cd0a AM |
8288 | Insn insn = nop; |
8289 | elfcpp::Swap<32, big_endian>::writeval(iview, insn); | |
8290 | r_type = elfcpp::R_POWERPC_NONE; | |
8291 | } | |
8292 | } | |
8293 | } | |
8294 | else if (r_type == elfcpp::R_POWERPC_GOT_TLSLD16 | |
8295 | || r_type == elfcpp::R_POWERPC_GOT_TLSLD16_LO | |
8296 | || r_type == elfcpp::R_POWERPC_GOT_TLSLD16_HI | |
8297 | || r_type == elfcpp::R_POWERPC_GOT_TLSLD16_HA) | |
8298 | { | |
8299 | // First instruction of a local dynamic sequence, arg setup insn. | |
8300 | const tls::Tls_optimization tls_type = target->optimize_tls_ld(); | |
8301 | if (tls_type == tls::TLSOPT_NONE) | |
8302 | { | |
8303 | value = target->tlsld_got_offset(); | |
8304 | value -= target->got_section()->got_base_offset(object); | |
8305 | } | |
8306 | else | |
8307 | { | |
8308 | gold_assert(tls_type == tls::TLSOPT_TO_LE); | |
8309 | if (r_type == elfcpp::R_POWERPC_GOT_TLSLD16 | |
8310 | || r_type == elfcpp::R_POWERPC_GOT_TLSLD16_LO) | |
8311 | { | |
dcfc7dd4 | 8312 | Insn* iview = reinterpret_cast<Insn*>(view - d_offset); |
0f81d3f0 AM |
8313 | Insn insn = elfcpp::Swap<32, big_endian>::readval(iview); |
8314 | insn &= (1 << 26) - (1 << 21); // extract rt | |
dd93cd0a | 8315 | if (size == 32) |
0f81d3f0 AM |
8316 | insn |= addis_0_2; |
8317 | else | |
8318 | insn |= addis_0_13; | |
dd93cd0a AM |
8319 | elfcpp::Swap<32, big_endian>::writeval(iview, insn); |
8320 | r_type = elfcpp::R_POWERPC_TPREL16_HA; | |
7404fe1b | 8321 | value = dtp_offset; |
dd93cd0a AM |
8322 | } |
8323 | else | |
8324 | { | |
dcfc7dd4 | 8325 | Insn* iview = reinterpret_cast<Insn*>(view - d_offset); |
dd93cd0a AM |
8326 | Insn insn = nop; |
8327 | elfcpp::Swap<32, big_endian>::writeval(iview, insn); | |
8328 | r_type = elfcpp::R_POWERPC_NONE; | |
8329 | } | |
8330 | } | |
8331 | } | |
8332 | else if (r_type == elfcpp::R_POWERPC_GOT_DTPREL16 | |
8333 | || r_type == elfcpp::R_POWERPC_GOT_DTPREL16_LO | |
8334 | || r_type == elfcpp::R_POWERPC_GOT_DTPREL16_HI | |
8335 | || r_type == elfcpp::R_POWERPC_GOT_DTPREL16_HA) | |
8336 | { | |
8337 | // Accesses relative to a local dynamic sequence address, | |
8338 | // no optimisation here. | |
8339 | if (gsym != NULL) | |
8340 | { | |
8341 | gold_assert(gsym->has_got_offset(GOT_TYPE_DTPREL)); | |
8342 | value = gsym->got_offset(GOT_TYPE_DTPREL); | |
8343 | } | |
8344 | else | |
8345 | { | |
dd93cd0a AM |
8346 | gold_assert(object->local_has_got_offset(r_sym, GOT_TYPE_DTPREL)); |
8347 | value = object->local_got_offset(r_sym, GOT_TYPE_DTPREL); | |
8348 | } | |
8349 | value -= target->got_section()->got_base_offset(object); | |
8350 | } | |
8351 | else if (r_type == elfcpp::R_POWERPC_GOT_TPREL16 | |
8352 | || r_type == elfcpp::R_POWERPC_GOT_TPREL16_LO | |
8353 | || r_type == elfcpp::R_POWERPC_GOT_TPREL16_HI | |
8354 | || r_type == elfcpp::R_POWERPC_GOT_TPREL16_HA) | |
8355 | { | |
8356 | // First instruction of initial exec sequence. | |
8357 | const bool final = gsym == NULL || gsym->final_value_is_known(); | |
8358 | const tls::Tls_optimization tls_type = target->optimize_tls_ie(final); | |
8359 | if (tls_type == tls::TLSOPT_NONE) | |
8360 | { | |
8361 | if (gsym != NULL) | |
8362 | { | |
8363 | gold_assert(gsym->has_got_offset(GOT_TYPE_TPREL)); | |
8364 | value = gsym->got_offset(GOT_TYPE_TPREL); | |
8365 | } | |
8366 | else | |
8367 | { | |
dd93cd0a AM |
8368 | gold_assert(object->local_has_got_offset(r_sym, GOT_TYPE_TPREL)); |
8369 | value = object->local_got_offset(r_sym, GOT_TYPE_TPREL); | |
8370 | } | |
8371 | value -= target->got_section()->got_base_offset(object); | |
8372 | } | |
8373 | else | |
8374 | { | |
8375 | gold_assert(tls_type == tls::TLSOPT_TO_LE); | |
8376 | if (r_type == elfcpp::R_POWERPC_GOT_TPREL16 | |
8377 | || r_type == elfcpp::R_POWERPC_GOT_TPREL16_LO) | |
8378 | { | |
dcfc7dd4 | 8379 | Insn* iview = reinterpret_cast<Insn*>(view - d_offset); |
dd93cd0a AM |
8380 | Insn insn = elfcpp::Swap<32, big_endian>::readval(iview); |
8381 | insn &= (1 << 26) - (1 << 21); // extract rt from ld | |
8382 | if (size == 32) | |
8383 | insn |= addis_0_2; | |
8384 | else | |
8385 | insn |= addis_0_13; | |
8386 | elfcpp::Swap<32, big_endian>::writeval(iview, insn); | |
8387 | r_type = elfcpp::R_POWERPC_TPREL16_HA; | |
8388 | value = psymval->value(object, rela.get_r_addend()); | |
8389 | } | |
8390 | else | |
8391 | { | |
dcfc7dd4 | 8392 | Insn* iview = reinterpret_cast<Insn*>(view - d_offset); |
dd93cd0a AM |
8393 | Insn insn = nop; |
8394 | elfcpp::Swap<32, big_endian>::writeval(iview, insn); | |
8395 | r_type = elfcpp::R_POWERPC_NONE; | |
8396 | } | |
8397 | } | |
8398 | } | |
8399 | else if ((size == 64 && r_type == elfcpp::R_PPC64_TLSGD) | |
8400 | || (size == 32 && r_type == elfcpp::R_PPC_TLSGD)) | |
8401 | { | |
8402 | // Second instruction of a global dynamic sequence, | |
8403 | // the __tls_get_addr call | |
e3deeb9c | 8404 | this->expect_tls_get_addr_call(relinfo, relnum, rela.get_r_offset()); |
dd93cd0a AM |
8405 | const bool final = gsym == NULL || gsym->final_value_is_known(); |
8406 | const tls::Tls_optimization tls_type = target->optimize_tls_gd(final); | |
8407 | if (tls_type != tls::TLSOPT_NONE) | |
8408 | { | |
8409 | if (tls_type == tls::TLSOPT_TO_IE) | |
8410 | { | |
8411 | Insn* iview = reinterpret_cast<Insn*>(view); | |
8412 | Insn insn = add_3_3_13; | |
8413 | if (size == 32) | |
8414 | insn = add_3_3_2; | |
8415 | elfcpp::Swap<32, big_endian>::writeval(iview, insn); | |
8416 | r_type = elfcpp::R_POWERPC_NONE; | |
8417 | } | |
8418 | else | |
8419 | { | |
8420 | Insn* iview = reinterpret_cast<Insn*>(view); | |
8421 | Insn insn = addi_3_3; | |
8422 | elfcpp::Swap<32, big_endian>::writeval(iview, insn); | |
8423 | r_type = elfcpp::R_POWERPC_TPREL16_LO; | |
dcfc7dd4 | 8424 | view += d_offset; |
dd93cd0a AM |
8425 | value = psymval->value(object, rela.get_r_addend()); |
8426 | } | |
e3deeb9c | 8427 | this->skip_next_tls_get_addr_call(); |
dd93cd0a AM |
8428 | } |
8429 | } | |
8430 | else if ((size == 64 && r_type == elfcpp::R_PPC64_TLSLD) | |
8431 | || (size == 32 && r_type == elfcpp::R_PPC_TLSLD)) | |
8432 | { | |
8433 | // Second instruction of a local dynamic sequence, | |
8434 | // the __tls_get_addr call | |
e3deeb9c | 8435 | this->expect_tls_get_addr_call(relinfo, relnum, rela.get_r_offset()); |
dd93cd0a AM |
8436 | const tls::Tls_optimization tls_type = target->optimize_tls_ld(); |
8437 | if (tls_type == tls::TLSOPT_TO_LE) | |
8438 | { | |
8439 | Insn* iview = reinterpret_cast<Insn*>(view); | |
8440 | Insn insn = addi_3_3; | |
8441 | elfcpp::Swap<32, big_endian>::writeval(iview, insn); | |
e3deeb9c | 8442 | this->skip_next_tls_get_addr_call(); |
dd93cd0a | 8443 | r_type = elfcpp::R_POWERPC_TPREL16_LO; |
dcfc7dd4 | 8444 | view += d_offset; |
7404fe1b | 8445 | value = dtp_offset; |
dd93cd0a AM |
8446 | } |
8447 | } | |
8448 | else if (r_type == elfcpp::R_POWERPC_TLS) | |
8449 | { | |
8450 | // Second instruction of an initial exec sequence | |
8451 | const bool final = gsym == NULL || gsym->final_value_is_known(); | |
8452 | const tls::Tls_optimization tls_type = target->optimize_tls_ie(final); | |
8453 | if (tls_type == tls::TLSOPT_TO_LE) | |
8454 | { | |
8455 | Insn* iview = reinterpret_cast<Insn*>(view); | |
8456 | Insn insn = elfcpp::Swap<32, big_endian>::readval(iview); | |
8457 | unsigned int reg = size == 32 ? 2 : 13; | |
8458 | insn = at_tls_transform(insn, reg); | |
8459 | gold_assert(insn != 0); | |
8460 | elfcpp::Swap<32, big_endian>::writeval(iview, insn); | |
8461 | r_type = elfcpp::R_POWERPC_TPREL16_LO; | |
dcfc7dd4 | 8462 | view += d_offset; |
dd93cd0a AM |
8463 | value = psymval->value(object, rela.get_r_addend()); |
8464 | } | |
8465 | } | |
0cfb0717 | 8466 | else if (!has_stub_value) |
cf43a2fe | 8467 | { |
dd93cd0a | 8468 | Address addend = 0; |
cbcb23fa | 8469 | if (!(size == 32 && r_type == elfcpp::R_PPC_PLTREL24)) |
cf43a2fe | 8470 | addend = rela.get_r_addend(); |
c9824451 | 8471 | value = psymval->value(object, addend); |
dd93cd0a | 8472 | if (size == 64 && is_branch_reloc(r_type)) |
9055360d AM |
8473 | { |
8474 | if (target->abiversion() >= 2) | |
8475 | { | |
8476 | if (gsym != NULL) | |
8477 | value += object->ppc64_local_entry_offset(gsym); | |
8478 | else | |
8479 | value += object->ppc64_local_entry_offset(r_sym); | |
8480 | } | |
8481 | else | |
1611bc4a AM |
8482 | { |
8483 | unsigned int dest_shndx; | |
8484 | target->symval_for_branch(relinfo->symtab, gsym, object, | |
8485 | &value, &dest_shndx); | |
8486 | } | |
9055360d | 8487 | } |
cbcb23fa | 8488 | Address max_branch_offset = max_branch_delta(r_type); |
ec661b9d AM |
8489 | if (max_branch_offset != 0 |
8490 | && value - address + max_branch_offset >= 2 * max_branch_offset) | |
8491 | { | |
8492 | Stub_table<size, big_endian>* stub_table | |
8493 | = object->stub_table(relinfo->data_shndx); | |
0cfdc767 AM |
8494 | if (stub_table != NULL) |
8495 | { | |
8496 | Address off = stub_table->find_long_branch_entry(object, value); | |
8497 | if (off != invalid_address) | |
0cfb0717 AM |
8498 | { |
8499 | value = (stub_table->stub_address() + stub_table->plt_size() | |
8500 | + off); | |
8501 | has_stub_value = true; | |
8502 | } | |
0cfdc767 | 8503 | } |
ec661b9d | 8504 | } |
42cacb20 DE |
8505 | } |
8506 | ||
42cacb20 DE |
8507 | switch (r_type) |
8508 | { | |
dd93cd0a AM |
8509 | case elfcpp::R_PPC64_REL64: |
8510 | case elfcpp::R_POWERPC_REL32: | |
8511 | case elfcpp::R_POWERPC_REL24: | |
8512 | case elfcpp::R_PPC_PLTREL24: | |
8513 | case elfcpp::R_PPC_LOCAL24PC: | |
8514 | case elfcpp::R_POWERPC_REL16: | |
8515 | case elfcpp::R_POWERPC_REL16_LO: | |
8516 | case elfcpp::R_POWERPC_REL16_HI: | |
8517 | case elfcpp::R_POWERPC_REL16_HA: | |
a680de9a | 8518 | case elfcpp::R_POWERPC_REL16DX_HA: |
dd93cd0a AM |
8519 | case elfcpp::R_POWERPC_REL14: |
8520 | case elfcpp::R_POWERPC_REL14_BRTAKEN: | |
8521 | case elfcpp::R_POWERPC_REL14_BRNTAKEN: | |
8522 | value -= address; | |
8523 | break; | |
8524 | ||
42cacb20 DE |
8525 | case elfcpp::R_PPC64_TOC16: |
8526 | case elfcpp::R_PPC64_TOC16_LO: | |
8527 | case elfcpp::R_PPC64_TOC16_HI: | |
8528 | case elfcpp::R_PPC64_TOC16_HA: | |
8529 | case elfcpp::R_PPC64_TOC16_DS: | |
8530 | case elfcpp::R_PPC64_TOC16_LO_DS: | |
cf43a2fe | 8531 | // Subtract the TOC base address. |
c9269dff | 8532 | value -= (target->got_section()->output_section()->address() |
dd93cd0a | 8533 | + object->toc_base_offset()); |
42cacb20 DE |
8534 | break; |
8535 | ||
cf43a2fe AM |
8536 | case elfcpp::R_POWERPC_SECTOFF: |
8537 | case elfcpp::R_POWERPC_SECTOFF_LO: | |
8538 | case elfcpp::R_POWERPC_SECTOFF_HI: | |
8539 | case elfcpp::R_POWERPC_SECTOFF_HA: | |
8540 | case elfcpp::R_PPC64_SECTOFF_DS: | |
8541 | case elfcpp::R_PPC64_SECTOFF_LO_DS: | |
8542 | if (os != NULL) | |
8543 | value -= os->address(); | |
42cacb20 DE |
8544 | break; |
8545 | ||
dd93cd0a AM |
8546 | case elfcpp::R_PPC64_TPREL16_DS: |
8547 | case elfcpp::R_PPC64_TPREL16_LO_DS: | |
f9c6b907 AM |
8548 | case elfcpp::R_PPC64_TPREL16_HIGH: |
8549 | case elfcpp::R_PPC64_TPREL16_HIGHA: | |
dd93cd0a | 8550 | if (size != 64) |
f9c6b907 | 8551 | // R_PPC_TLSGD, R_PPC_TLSLD, R_PPC_EMB_RELST_LO, R_PPC_EMB_RELST_HI |
dd93cd0a | 8552 | break; |
d8e90251 | 8553 | // Fall through. |
dd93cd0a AM |
8554 | case elfcpp::R_POWERPC_TPREL16: |
8555 | case elfcpp::R_POWERPC_TPREL16_LO: | |
8556 | case elfcpp::R_POWERPC_TPREL16_HI: | |
8557 | case elfcpp::R_POWERPC_TPREL16_HA: | |
8558 | case elfcpp::R_POWERPC_TPREL: | |
8559 | case elfcpp::R_PPC64_TPREL16_HIGHER: | |
8560 | case elfcpp::R_PPC64_TPREL16_HIGHERA: | |
8561 | case elfcpp::R_PPC64_TPREL16_HIGHEST: | |
8562 | case elfcpp::R_PPC64_TPREL16_HIGHESTA: | |
8563 | // tls symbol values are relative to tls_segment()->vaddr() | |
8564 | value -= tp_offset; | |
8565 | break; | |
8566 | ||
8567 | case elfcpp::R_PPC64_DTPREL16_DS: | |
8568 | case elfcpp::R_PPC64_DTPREL16_LO_DS: | |
8569 | case elfcpp::R_PPC64_DTPREL16_HIGHER: | |
8570 | case elfcpp::R_PPC64_DTPREL16_HIGHERA: | |
8571 | case elfcpp::R_PPC64_DTPREL16_HIGHEST: | |
8572 | case elfcpp::R_PPC64_DTPREL16_HIGHESTA: | |
8573 | if (size != 64) | |
8574 | // R_PPC_EMB_NADDR32, R_PPC_EMB_NADDR16, R_PPC_EMB_NADDR16_LO | |
8575 | // R_PPC_EMB_NADDR16_HI, R_PPC_EMB_NADDR16_HA, R_PPC_EMB_SDAI16 | |
8576 | break; | |
d8e90251 | 8577 | // Fall through. |
dd93cd0a AM |
8578 | case elfcpp::R_POWERPC_DTPREL16: |
8579 | case elfcpp::R_POWERPC_DTPREL16_LO: | |
8580 | case elfcpp::R_POWERPC_DTPREL16_HI: | |
8581 | case elfcpp::R_POWERPC_DTPREL16_HA: | |
8582 | case elfcpp::R_POWERPC_DTPREL: | |
f9c6b907 AM |
8583 | case elfcpp::R_PPC64_DTPREL16_HIGH: |
8584 | case elfcpp::R_PPC64_DTPREL16_HIGHA: | |
dd93cd0a AM |
8585 | // tls symbol values are relative to tls_segment()->vaddr() |
8586 | value -= dtp_offset; | |
8587 | break; | |
8588 | ||
45965137 AM |
8589 | case elfcpp::R_PPC64_ADDR64_LOCAL: |
8590 | if (gsym != NULL) | |
8591 | value += object->ppc64_local_entry_offset(gsym); | |
8592 | else | |
8593 | value += object->ppc64_local_entry_offset(r_sym); | |
8594 | break; | |
8595 | ||
42cacb20 DE |
8596 | default: |
8597 | break; | |
8598 | } | |
8599 | ||
dd93cd0a | 8600 | Insn branch_bit = 0; |
42cacb20 DE |
8601 | switch (r_type) |
8602 | { | |
dd93cd0a AM |
8603 | case elfcpp::R_POWERPC_ADDR14_BRTAKEN: |
8604 | case elfcpp::R_POWERPC_REL14_BRTAKEN: | |
8605 | branch_bit = 1 << 21; | |
d8e90251 | 8606 | // Fall through. |
dd93cd0a AM |
8607 | case elfcpp::R_POWERPC_ADDR14_BRNTAKEN: |
8608 | case elfcpp::R_POWERPC_REL14_BRNTAKEN: | |
8609 | { | |
8610 | Insn* iview = reinterpret_cast<Insn*>(view); | |
8611 | Insn insn = elfcpp::Swap<32, big_endian>::readval(iview); | |
8612 | insn &= ~(1 << 21); | |
8613 | insn |= branch_bit; | |
8614 | if (this->is_isa_v2) | |
8615 | { | |
8616 | // Set 'a' bit. This is 0b00010 in BO field for branch | |
8617 | // on CR(BI) insns (BO == 001at or 011at), and 0b01000 | |
8618 | // for branch on CTR insns (BO == 1a00t or 1a01t). | |
8619 | if ((insn & (0x14 << 21)) == (0x04 << 21)) | |
8620 | insn |= 0x02 << 21; | |
8621 | else if ((insn & (0x14 << 21)) == (0x10 << 21)) | |
8622 | insn |= 0x08 << 21; | |
8623 | else | |
8624 | break; | |
8625 | } | |
8626 | else | |
8627 | { | |
8628 | // Invert 'y' bit if not the default. | |
8629 | if (static_cast<Signed_address>(value) < 0) | |
8630 | insn ^= 1 << 21; | |
8631 | } | |
8632 | elfcpp::Swap<32, big_endian>::writeval(iview, insn); | |
8633 | } | |
8634 | break; | |
8635 | ||
8636 | default: | |
8637 | break; | |
8638 | } | |
8639 | ||
aba6bc71 AM |
8640 | if (size == 64) |
8641 | { | |
aba6bc71 AM |
8642 | switch (r_type) |
8643 | { | |
8644 | default: | |
8645 | break; | |
8646 | ||
5edad15d AM |
8647 | // Multi-instruction sequences that access the GOT/TOC can |
8648 | // be optimized, eg. | |
8649 | // addis ra,r2,x@got@ha; ld rb,x@got@l(ra); | |
8650 | // to addis ra,r2,x@toc@ha; addi rb,ra,x@toc@l; | |
8651 | // and | |
8652 | // addis ra,r2,0; addi rb,ra,x@toc@l; | |
8653 | // to nop; addi rb,r2,x@toc; | |
8654 | // FIXME: the @got sequence shown above is not yet | |
8655 | // optimized. Note that gcc as of 2017-01-07 doesn't use | |
8656 | // the ELF @got relocs except for TLS, instead using the | |
8657 | // PowerOpen variant of a compiler managed GOT (called TOC). | |
8658 | // The PowerOpen TOC sequence equivalent to the first | |
8659 | // example is optimized. | |
aba6bc71 AM |
8660 | case elfcpp::R_POWERPC_GOT_TLSLD16_HA: |
8661 | case elfcpp::R_POWERPC_GOT_TLSGD16_HA: | |
8662 | case elfcpp::R_POWERPC_GOT_TPREL16_HA: | |
8663 | case elfcpp::R_POWERPC_GOT_DTPREL16_HA: | |
8664 | case elfcpp::R_POWERPC_GOT16_HA: | |
8665 | case elfcpp::R_PPC64_TOC16_HA: | |
d8f5a274 | 8666 | if (parameters->options().toc_optimize()) |
aba6bc71 | 8667 | { |
dcfc7dd4 | 8668 | Insn* iview = reinterpret_cast<Insn*>(view - d_offset); |
aba6bc71 | 8669 | Insn insn = elfcpp::Swap<32, big_endian>::readval(iview); |
5edad15d AM |
8670 | if (r_type == elfcpp::R_PPC64_TOC16_HA |
8671 | && object->make_toc_relative(target, &value)) | |
8672 | { | |
8673 | gold_assert((insn & ((0x3f << 26) | 0x1f << 16)) | |
8674 | == ((15u << 26) | (2 << 16))); | |
8675 | } | |
8676 | if (((insn & ((0x3f << 26) | 0x1f << 16)) | |
8677 | == ((15u << 26) | (2 << 16)) /* addis rt,2,imm */) | |
8678 | && value + 0x8000 < 0x10000) | |
aba6bc71 AM |
8679 | { |
8680 | elfcpp::Swap<32, big_endian>::writeval(iview, nop); | |
8681 | return true; | |
8682 | } | |
8683 | } | |
8684 | break; | |
8685 | ||
8686 | case elfcpp::R_POWERPC_GOT_TLSLD16_LO: | |
8687 | case elfcpp::R_POWERPC_GOT_TLSGD16_LO: | |
8688 | case elfcpp::R_POWERPC_GOT_TPREL16_LO: | |
8689 | case elfcpp::R_POWERPC_GOT_DTPREL16_LO: | |
8690 | case elfcpp::R_POWERPC_GOT16_LO: | |
8691 | case elfcpp::R_PPC64_GOT16_LO_DS: | |
8692 | case elfcpp::R_PPC64_TOC16_LO: | |
8693 | case elfcpp::R_PPC64_TOC16_LO_DS: | |
d8f5a274 | 8694 | if (parameters->options().toc_optimize()) |
aba6bc71 | 8695 | { |
dcfc7dd4 | 8696 | Insn* iview = reinterpret_cast<Insn*>(view - d_offset); |
aba6bc71 | 8697 | Insn insn = elfcpp::Swap<32, big_endian>::readval(iview); |
5edad15d AM |
8698 | bool changed = false; |
8699 | if (r_type == elfcpp::R_PPC64_TOC16_LO_DS | |
8700 | && object->make_toc_relative(target, &value)) | |
8701 | { | |
8702 | gold_assert ((insn & (0x3f << 26)) == 58u << 26 /* ld */); | |
8703 | insn ^= (14u << 26) ^ (58u << 26); | |
8704 | r_type = elfcpp::R_PPC64_TOC16_LO; | |
8705 | changed = true; | |
8706 | } | |
8707 | if (ok_lo_toc_insn(insn, r_type) | |
8708 | && value + 0x8000 < 0x10000) | |
aba6bc71 AM |
8709 | { |
8710 | if ((insn & (0x3f << 26)) == 12u << 26 /* addic */) | |
8711 | { | |
8712 | // Transform addic to addi when we change reg. | |
8713 | insn &= ~((0x3f << 26) | (0x1f << 16)); | |
8714 | insn |= (14u << 26) | (2 << 16); | |
8715 | } | |
8716 | else | |
8717 | { | |
8718 | insn &= ~(0x1f << 16); | |
8719 | insn |= 2 << 16; | |
8720 | } | |
5edad15d | 8721 | changed = true; |
aba6bc71 | 8722 | } |
5edad15d AM |
8723 | if (changed) |
8724 | elfcpp::Swap<32, big_endian>::writeval(iview, insn); | |
aba6bc71 AM |
8725 | } |
8726 | break; | |
549dba71 AM |
8727 | |
8728 | case elfcpp::R_PPC64_ENTRY: | |
8729 | value = (target->got_section()->output_section()->address() | |
8730 | + object->toc_base_offset()); | |
8731 | if (value + 0x80008000 <= 0xffffffff | |
8732 | && !parameters->options().output_is_position_independent()) | |
8733 | { | |
8734 | Insn* iview = reinterpret_cast<Insn*>(view); | |
8735 | Insn insn1 = elfcpp::Swap<32, big_endian>::readval(iview); | |
8736 | Insn insn2 = elfcpp::Swap<32, big_endian>::readval(iview + 1); | |
8737 | ||
8738 | if ((insn1 & ~0xfffc) == ld_2_12 | |
8739 | && insn2 == add_2_2_12) | |
8740 | { | |
8741 | insn1 = lis_2 + ha(value); | |
8742 | elfcpp::Swap<32, big_endian>::writeval(iview, insn1); | |
8743 | insn2 = addi_2_2 + l(value); | |
8744 | elfcpp::Swap<32, big_endian>::writeval(iview + 1, insn2); | |
8745 | return true; | |
8746 | } | |
8747 | } | |
8748 | else | |
8749 | { | |
8750 | value -= address; | |
8751 | if (value + 0x80008000 <= 0xffffffff) | |
8752 | { | |
8753 | Insn* iview = reinterpret_cast<Insn*>(view); | |
8754 | Insn insn1 = elfcpp::Swap<32, big_endian>::readval(iview); | |
8755 | Insn insn2 = elfcpp::Swap<32, big_endian>::readval(iview + 1); | |
8756 | ||
8757 | if ((insn1 & ~0xfffc) == ld_2_12 | |
8758 | && insn2 == add_2_2_12) | |
8759 | { | |
8760 | insn1 = addis_2_12 + ha(value); | |
8761 | elfcpp::Swap<32, big_endian>::writeval(iview, insn1); | |
8762 | insn2 = addi_2_2 + l(value); | |
8763 | elfcpp::Swap<32, big_endian>::writeval(iview + 1, insn2); | |
8764 | return true; | |
8765 | } | |
8766 | } | |
8767 | } | |
8768 | break; | |
e3a7574e AM |
8769 | |
8770 | case elfcpp::R_POWERPC_REL16_LO: | |
8771 | // If we are generating a non-PIC executable, edit | |
8772 | // 0: addis 2,12,.TOC.-0b@ha | |
8773 | // addi 2,2,.TOC.-0b@l | |
8774 | // used by ELFv2 global entry points to set up r2, to | |
8775 | // lis 2,.TOC.@ha | |
8776 | // addi 2,2,.TOC.@l | |
8777 | // if .TOC. is in range. */ | |
8778 | if (value + address - 4 + 0x80008000 <= 0xffffffff | |
8779 | && relnum != 0 | |
8780 | && preloc != NULL | |
8781 | && target->abiversion() >= 2 | |
8782 | && !parameters->options().output_is_position_independent() | |
4f038ee5 | 8783 | && rela.get_r_addend() == d_offset + 4 |
e3a7574e AM |
8784 | && gsym != NULL |
8785 | && strcmp(gsym->name(), ".TOC.") == 0) | |
8786 | { | |
0e123f69 | 8787 | const int reloc_size = elfcpp::Elf_sizes<size>::rela_size; |
e3a7574e AM |
8788 | Reltype prev_rela(preloc - reloc_size); |
8789 | if ((prev_rela.get_r_info() | |
8790 | == elfcpp::elf_r_info<size>(r_sym, | |
8791 | elfcpp::R_POWERPC_REL16_HA)) | |
8792 | && prev_rela.get_r_offset() + 4 == rela.get_r_offset() | |
8793 | && prev_rela.get_r_addend() + 4 == rela.get_r_addend()) | |
8794 | { | |
dcfc7dd4 | 8795 | Insn* iview = reinterpret_cast<Insn*>(view - d_offset); |
e3a7574e AM |
8796 | Insn insn1 = elfcpp::Swap<32, big_endian>::readval(iview - 1); |
8797 | Insn insn2 = elfcpp::Swap<32, big_endian>::readval(iview); | |
8798 | ||
8799 | if ((insn1 & 0xffff0000) == addis_2_12 | |
8800 | && (insn2 & 0xffff0000) == addi_2_2) | |
8801 | { | |
8802 | insn1 = lis_2 + ha(value + address - 4); | |
8803 | elfcpp::Swap<32, big_endian>::writeval(iview - 1, insn1); | |
8804 | insn2 = addi_2_2 + l(value + address - 4); | |
8805 | elfcpp::Swap<32, big_endian>::writeval(iview, insn2); | |
8806 | if (relinfo->rr) | |
8807 | { | |
8808 | relinfo->rr->set_strategy(relnum - 1, | |
8809 | Relocatable_relocs::RELOC_SPECIAL); | |
8810 | relinfo->rr->set_strategy(relnum, | |
8811 | Relocatable_relocs::RELOC_SPECIAL); | |
8812 | } | |
8813 | return true; | |
8814 | } | |
8815 | } | |
8816 | } | |
8817 | break; | |
aba6bc71 AM |
8818 | } |
8819 | } | |
8820 | ||
f4baf0d4 | 8821 | typename Reloc::Overflow_check overflow = Reloc::CHECK_NONE; |
b80eed39 | 8822 | elfcpp::Shdr<size, big_endian> shdr(relinfo->data_shdr); |
dd93cd0a AM |
8823 | switch (r_type) |
8824 | { | |
8825 | case elfcpp::R_POWERPC_ADDR32: | |
8826 | case elfcpp::R_POWERPC_UADDR32: | |
8827 | if (size == 64) | |
f4baf0d4 | 8828 | overflow = Reloc::CHECK_BITFIELD; |
42cacb20 DE |
8829 | break; |
8830 | ||
8831 | case elfcpp::R_POWERPC_REL32: | |
a680de9a | 8832 | case elfcpp::R_POWERPC_REL16DX_HA: |
dd93cd0a | 8833 | if (size == 64) |
f4baf0d4 | 8834 | overflow = Reloc::CHECK_SIGNED; |
dd93cd0a AM |
8835 | break; |
8836 | ||
dd93cd0a | 8837 | case elfcpp::R_POWERPC_UADDR16: |
f4baf0d4 | 8838 | overflow = Reloc::CHECK_BITFIELD; |
42cacb20 DE |
8839 | break; |
8840 | ||
b80eed39 AM |
8841 | case elfcpp::R_POWERPC_ADDR16: |
8842 | // We really should have three separate relocations, | |
8843 | // one for 16-bit data, one for insns with 16-bit signed fields, | |
8844 | // and one for insns with 16-bit unsigned fields. | |
8845 | overflow = Reloc::CHECK_BITFIELD; | |
8846 | if ((shdr.get_sh_flags() & elfcpp::SHF_EXECINSTR) != 0) | |
8847 | overflow = Reloc::CHECK_LOW_INSN; | |
8848 | break; | |
8849 | ||
f9c6b907 AM |
8850 | case elfcpp::R_POWERPC_ADDR16_HI: |
8851 | case elfcpp::R_POWERPC_ADDR16_HA: | |
8852 | case elfcpp::R_POWERPC_GOT16_HI: | |
8853 | case elfcpp::R_POWERPC_GOT16_HA: | |
8854 | case elfcpp::R_POWERPC_PLT16_HI: | |
8855 | case elfcpp::R_POWERPC_PLT16_HA: | |
8856 | case elfcpp::R_POWERPC_SECTOFF_HI: | |
8857 | case elfcpp::R_POWERPC_SECTOFF_HA: | |
8858 | case elfcpp::R_PPC64_TOC16_HI: | |
8859 | case elfcpp::R_PPC64_TOC16_HA: | |
8860 | case elfcpp::R_PPC64_PLTGOT16_HI: | |
8861 | case elfcpp::R_PPC64_PLTGOT16_HA: | |
8862 | case elfcpp::R_POWERPC_TPREL16_HI: | |
8863 | case elfcpp::R_POWERPC_TPREL16_HA: | |
8864 | case elfcpp::R_POWERPC_DTPREL16_HI: | |
8865 | case elfcpp::R_POWERPC_DTPREL16_HA: | |
8866 | case elfcpp::R_POWERPC_GOT_TLSGD16_HI: | |
8867 | case elfcpp::R_POWERPC_GOT_TLSGD16_HA: | |
8868 | case elfcpp::R_POWERPC_GOT_TLSLD16_HI: | |
8869 | case elfcpp::R_POWERPC_GOT_TLSLD16_HA: | |
8870 | case elfcpp::R_POWERPC_GOT_TPREL16_HI: | |
8871 | case elfcpp::R_POWERPC_GOT_TPREL16_HA: | |
8872 | case elfcpp::R_POWERPC_GOT_DTPREL16_HI: | |
8873 | case elfcpp::R_POWERPC_GOT_DTPREL16_HA: | |
8874 | case elfcpp::R_POWERPC_REL16_HI: | |
8875 | case elfcpp::R_POWERPC_REL16_HA: | |
b80eed39 AM |
8876 | if (size != 32) |
8877 | overflow = Reloc::CHECK_HIGH_INSN; | |
8878 | break; | |
8879 | ||
dd93cd0a AM |
8880 | case elfcpp::R_POWERPC_REL16: |
8881 | case elfcpp::R_PPC64_TOC16: | |
8882 | case elfcpp::R_POWERPC_GOT16: | |
8883 | case elfcpp::R_POWERPC_SECTOFF: | |
8884 | case elfcpp::R_POWERPC_TPREL16: | |
8885 | case elfcpp::R_POWERPC_DTPREL16: | |
b80eed39 AM |
8886 | case elfcpp::R_POWERPC_GOT_TLSGD16: |
8887 | case elfcpp::R_POWERPC_GOT_TLSLD16: | |
8888 | case elfcpp::R_POWERPC_GOT_TPREL16: | |
8889 | case elfcpp::R_POWERPC_GOT_DTPREL16: | |
8890 | overflow = Reloc::CHECK_LOW_INSN; | |
8891 | break; | |
8892 | ||
8893 | case elfcpp::R_POWERPC_ADDR24: | |
8894 | case elfcpp::R_POWERPC_ADDR14: | |
8895 | case elfcpp::R_POWERPC_ADDR14_BRTAKEN: | |
8896 | case elfcpp::R_POWERPC_ADDR14_BRNTAKEN: | |
8897 | case elfcpp::R_PPC64_ADDR16_DS: | |
8898 | case elfcpp::R_POWERPC_REL24: | |
8899 | case elfcpp::R_PPC_PLTREL24: | |
8900 | case elfcpp::R_PPC_LOCAL24PC: | |
dd93cd0a AM |
8901 | case elfcpp::R_PPC64_TPREL16_DS: |
8902 | case elfcpp::R_PPC64_DTPREL16_DS: | |
8903 | case elfcpp::R_PPC64_TOC16_DS: | |
8904 | case elfcpp::R_PPC64_GOT16_DS: | |
8905 | case elfcpp::R_PPC64_SECTOFF_DS: | |
8906 | case elfcpp::R_POWERPC_REL14: | |
8907 | case elfcpp::R_POWERPC_REL14_BRTAKEN: | |
8908 | case elfcpp::R_POWERPC_REL14_BRNTAKEN: | |
f4baf0d4 | 8909 | overflow = Reloc::CHECK_SIGNED; |
42cacb20 | 8910 | break; |
dd93cd0a | 8911 | } |
42cacb20 | 8912 | |
dcfc7dd4 | 8913 | Insn* iview = reinterpret_cast<Insn*>(view - d_offset); |
a680de9a PB |
8914 | Insn insn = 0; |
8915 | ||
b80eed39 AM |
8916 | if (overflow == Reloc::CHECK_LOW_INSN |
8917 | || overflow == Reloc::CHECK_HIGH_INSN) | |
8918 | { | |
a680de9a | 8919 | insn = elfcpp::Swap<32, big_endian>::readval(iview); |
b80eed39 | 8920 | |
a47622ac AM |
8921 | if ((insn & (0x3f << 26)) == 10u << 26 /* cmpli */) |
8922 | overflow = Reloc::CHECK_BITFIELD; | |
8923 | else if (overflow == Reloc::CHECK_LOW_INSN | |
8924 | ? ((insn & (0x3f << 26)) == 28u << 26 /* andi */ | |
8925 | || (insn & (0x3f << 26)) == 24u << 26 /* ori */ | |
8926 | || (insn & (0x3f << 26)) == 26u << 26 /* xori */) | |
8927 | : ((insn & (0x3f << 26)) == 29u << 26 /* andis */ | |
8928 | || (insn & (0x3f << 26)) == 25u << 26 /* oris */ | |
8929 | || (insn & (0x3f << 26)) == 27u << 26 /* xoris */)) | |
b80eed39 | 8930 | overflow = Reloc::CHECK_UNSIGNED; |
e30880c2 CC |
8931 | else |
8932 | overflow = Reloc::CHECK_SIGNED; | |
b80eed39 AM |
8933 | } |
8934 | ||
a680de9a | 8935 | bool maybe_dq_reloc = false; |
3ea0a085 | 8936 | typename Powerpc_relocate_functions<size, big_endian>::Status status |
f4baf0d4 | 8937 | = Powerpc_relocate_functions<size, big_endian>::STATUS_OK; |
dd93cd0a AM |
8938 | switch (r_type) |
8939 | { | |
8940 | case elfcpp::R_POWERPC_NONE: | |
8941 | case elfcpp::R_POWERPC_TLS: | |
8942 | case elfcpp::R_POWERPC_GNU_VTINHERIT: | |
8943 | case elfcpp::R_POWERPC_GNU_VTENTRY: | |
42cacb20 DE |
8944 | break; |
8945 | ||
8946 | case elfcpp::R_PPC64_ADDR64: | |
dd93cd0a | 8947 | case elfcpp::R_PPC64_REL64: |
cf43a2fe | 8948 | case elfcpp::R_PPC64_TOC: |
45965137 | 8949 | case elfcpp::R_PPC64_ADDR64_LOCAL: |
dd93cd0a AM |
8950 | Reloc::addr64(view, value); |
8951 | break; | |
8952 | ||
8953 | case elfcpp::R_POWERPC_TPREL: | |
8954 | case elfcpp::R_POWERPC_DTPREL: | |
8955 | if (size == 64) | |
8956 | Reloc::addr64(view, value); | |
8957 | else | |
3ea0a085 | 8958 | status = Reloc::addr32(view, value, overflow); |
dd93cd0a AM |
8959 | break; |
8960 | ||
8961 | case elfcpp::R_PPC64_UADDR64: | |
8962 | Reloc::addr64_u(view, value); | |
42cacb20 DE |
8963 | break; |
8964 | ||
8965 | case elfcpp::R_POWERPC_ADDR32: | |
3ea0a085 | 8966 | status = Reloc::addr32(view, value, overflow); |
dd93cd0a AM |
8967 | break; |
8968 | ||
acc276d8 | 8969 | case elfcpp::R_POWERPC_REL32: |
dd93cd0a | 8970 | case elfcpp::R_POWERPC_UADDR32: |
3ea0a085 | 8971 | status = Reloc::addr32_u(view, value, overflow); |
dd93cd0a AM |
8972 | break; |
8973 | ||
8974 | case elfcpp::R_POWERPC_ADDR24: | |
8975 | case elfcpp::R_POWERPC_REL24: | |
8976 | case elfcpp::R_PPC_PLTREL24: | |
8977 | case elfcpp::R_PPC_LOCAL24PC: | |
3ea0a085 | 8978 | status = Reloc::addr24(view, value, overflow); |
42cacb20 DE |
8979 | break; |
8980 | ||
dd93cd0a AM |
8981 | case elfcpp::R_POWERPC_GOT_DTPREL16: |
8982 | case elfcpp::R_POWERPC_GOT_DTPREL16_LO: | |
ec86f434 AM |
8983 | case elfcpp::R_POWERPC_GOT_TPREL16: |
8984 | case elfcpp::R_POWERPC_GOT_TPREL16_LO: | |
dd93cd0a AM |
8985 | if (size == 64) |
8986 | { | |
ec86f434 | 8987 | // On ppc64 these are all ds form |
a680de9a | 8988 | maybe_dq_reloc = true; |
dd93cd0a AM |
8989 | break; |
8990 | } | |
c25aa1e1 | 8991 | // Fall through. |
cf43a2fe | 8992 | case elfcpp::R_POWERPC_ADDR16: |
dd93cd0a | 8993 | case elfcpp::R_POWERPC_REL16: |
cf43a2fe | 8994 | case elfcpp::R_PPC64_TOC16: |
42cacb20 | 8995 | case elfcpp::R_POWERPC_GOT16: |
cf43a2fe | 8996 | case elfcpp::R_POWERPC_SECTOFF: |
dd93cd0a AM |
8997 | case elfcpp::R_POWERPC_TPREL16: |
8998 | case elfcpp::R_POWERPC_DTPREL16: | |
8999 | case elfcpp::R_POWERPC_GOT_TLSGD16: | |
9000 | case elfcpp::R_POWERPC_GOT_TLSLD16: | |
cf43a2fe | 9001 | case elfcpp::R_POWERPC_ADDR16_LO: |
dd93cd0a | 9002 | case elfcpp::R_POWERPC_REL16_LO: |
cf43a2fe | 9003 | case elfcpp::R_PPC64_TOC16_LO: |
42cacb20 | 9004 | case elfcpp::R_POWERPC_GOT16_LO: |
cf43a2fe | 9005 | case elfcpp::R_POWERPC_SECTOFF_LO: |
dd93cd0a AM |
9006 | case elfcpp::R_POWERPC_TPREL16_LO: |
9007 | case elfcpp::R_POWERPC_DTPREL16_LO: | |
9008 | case elfcpp::R_POWERPC_GOT_TLSGD16_LO: | |
9009 | case elfcpp::R_POWERPC_GOT_TLSLD16_LO: | |
a680de9a PB |
9010 | if (size == 64) |
9011 | status = Reloc::addr16(view, value, overflow); | |
9012 | else | |
9013 | maybe_dq_reloc = true; | |
dd93cd0a AM |
9014 | break; |
9015 | ||
9016 | case elfcpp::R_POWERPC_UADDR16: | |
3ea0a085 | 9017 | status = Reloc::addr16_u(view, value, overflow); |
42cacb20 DE |
9018 | break; |
9019 | ||
f9c6b907 AM |
9020 | case elfcpp::R_PPC64_ADDR16_HIGH: |
9021 | case elfcpp::R_PPC64_TPREL16_HIGH: | |
9022 | case elfcpp::R_PPC64_DTPREL16_HIGH: | |
9023 | if (size == 32) | |
9024 | // R_PPC_EMB_MRKREF, R_PPC_EMB_RELST_LO, R_PPC_EMB_RELST_HA | |
9025 | goto unsupp; | |
d8e90251 | 9026 | // Fall through. |
cf43a2fe | 9027 | case elfcpp::R_POWERPC_ADDR16_HI: |
dd93cd0a | 9028 | case elfcpp::R_POWERPC_REL16_HI: |
cf43a2fe | 9029 | case elfcpp::R_PPC64_TOC16_HI: |
42cacb20 | 9030 | case elfcpp::R_POWERPC_GOT16_HI: |
cf43a2fe | 9031 | case elfcpp::R_POWERPC_SECTOFF_HI: |
dd93cd0a AM |
9032 | case elfcpp::R_POWERPC_TPREL16_HI: |
9033 | case elfcpp::R_POWERPC_DTPREL16_HI: | |
9034 | case elfcpp::R_POWERPC_GOT_TLSGD16_HI: | |
9035 | case elfcpp::R_POWERPC_GOT_TLSLD16_HI: | |
9036 | case elfcpp::R_POWERPC_GOT_TPREL16_HI: | |
9037 | case elfcpp::R_POWERPC_GOT_DTPREL16_HI: | |
9038 | Reloc::addr16_hi(view, value); | |
42cacb20 DE |
9039 | break; |
9040 | ||
f9c6b907 AM |
9041 | case elfcpp::R_PPC64_ADDR16_HIGHA: |
9042 | case elfcpp::R_PPC64_TPREL16_HIGHA: | |
9043 | case elfcpp::R_PPC64_DTPREL16_HIGHA: | |
9044 | if (size == 32) | |
9045 | // R_PPC_EMB_RELSEC16, R_PPC_EMB_RELST_HI, R_PPC_EMB_BIT_FLD | |
9046 | goto unsupp; | |
d8e90251 | 9047 | // Fall through. |
cf43a2fe | 9048 | case elfcpp::R_POWERPC_ADDR16_HA: |
dd93cd0a | 9049 | case elfcpp::R_POWERPC_REL16_HA: |
cf43a2fe | 9050 | case elfcpp::R_PPC64_TOC16_HA: |
42cacb20 | 9051 | case elfcpp::R_POWERPC_GOT16_HA: |
cf43a2fe | 9052 | case elfcpp::R_POWERPC_SECTOFF_HA: |
dd93cd0a AM |
9053 | case elfcpp::R_POWERPC_TPREL16_HA: |
9054 | case elfcpp::R_POWERPC_DTPREL16_HA: | |
9055 | case elfcpp::R_POWERPC_GOT_TLSGD16_HA: | |
9056 | case elfcpp::R_POWERPC_GOT_TLSLD16_HA: | |
9057 | case elfcpp::R_POWERPC_GOT_TPREL16_HA: | |
9058 | case elfcpp::R_POWERPC_GOT_DTPREL16_HA: | |
9059 | Reloc::addr16_ha(view, value); | |
42cacb20 DE |
9060 | break; |
9061 | ||
a680de9a PB |
9062 | case elfcpp::R_POWERPC_REL16DX_HA: |
9063 | status = Reloc::addr16dx_ha(view, value, overflow); | |
9064 | break; | |
9065 | ||
dd93cd0a AM |
9066 | case elfcpp::R_PPC64_DTPREL16_HIGHER: |
9067 | if (size == 32) | |
9068 | // R_PPC_EMB_NADDR16_LO | |
9069 | goto unsupp; | |
d8e90251 | 9070 | // Fall through. |
dd93cd0a AM |
9071 | case elfcpp::R_PPC64_ADDR16_HIGHER: |
9072 | case elfcpp::R_PPC64_TPREL16_HIGHER: | |
9073 | Reloc::addr16_hi2(view, value); | |
42cacb20 DE |
9074 | break; |
9075 | ||
dd93cd0a AM |
9076 | case elfcpp::R_PPC64_DTPREL16_HIGHERA: |
9077 | if (size == 32) | |
9078 | // R_PPC_EMB_NADDR16_HI | |
9079 | goto unsupp; | |
d8e90251 | 9080 | // Fall through. |
dd93cd0a AM |
9081 | case elfcpp::R_PPC64_ADDR16_HIGHERA: |
9082 | case elfcpp::R_PPC64_TPREL16_HIGHERA: | |
9083 | Reloc::addr16_ha2(view, value); | |
42cacb20 DE |
9084 | break; |
9085 | ||
dd93cd0a AM |
9086 | case elfcpp::R_PPC64_DTPREL16_HIGHEST: |
9087 | if (size == 32) | |
9088 | // R_PPC_EMB_NADDR16_HA | |
9089 | goto unsupp; | |
d8e90251 | 9090 | // Fall through. |
dd93cd0a AM |
9091 | case elfcpp::R_PPC64_ADDR16_HIGHEST: |
9092 | case elfcpp::R_PPC64_TPREL16_HIGHEST: | |
9093 | Reloc::addr16_hi3(view, value); | |
42cacb20 DE |
9094 | break; |
9095 | ||
dd93cd0a AM |
9096 | case elfcpp::R_PPC64_DTPREL16_HIGHESTA: |
9097 | if (size == 32) | |
9098 | // R_PPC_EMB_SDAI16 | |
9099 | goto unsupp; | |
d8e90251 | 9100 | // Fall through. |
dd93cd0a AM |
9101 | case elfcpp::R_PPC64_ADDR16_HIGHESTA: |
9102 | case elfcpp::R_PPC64_TPREL16_HIGHESTA: | |
9103 | Reloc::addr16_ha3(view, value); | |
9104 | break; | |
9105 | ||
9106 | case elfcpp::R_PPC64_DTPREL16_DS: | |
9107 | case elfcpp::R_PPC64_DTPREL16_LO_DS: | |
9108 | if (size == 32) | |
9109 | // R_PPC_EMB_NADDR32, R_PPC_EMB_NADDR16 | |
9110 | goto unsupp; | |
d8e90251 | 9111 | // Fall through. |
dd93cd0a AM |
9112 | case elfcpp::R_PPC64_TPREL16_DS: |
9113 | case elfcpp::R_PPC64_TPREL16_LO_DS: | |
9114 | if (size == 32) | |
9115 | // R_PPC_TLSGD, R_PPC_TLSLD | |
9116 | break; | |
d8e90251 | 9117 | // Fall through. |
cf43a2fe AM |
9118 | case elfcpp::R_PPC64_ADDR16_DS: |
9119 | case elfcpp::R_PPC64_ADDR16_LO_DS: | |
42cacb20 DE |
9120 | case elfcpp::R_PPC64_TOC16_DS: |
9121 | case elfcpp::R_PPC64_TOC16_LO_DS: | |
cf43a2fe AM |
9122 | case elfcpp::R_PPC64_GOT16_DS: |
9123 | case elfcpp::R_PPC64_GOT16_LO_DS: | |
9124 | case elfcpp::R_PPC64_SECTOFF_DS: | |
9125 | case elfcpp::R_PPC64_SECTOFF_LO_DS: | |
a680de9a | 9126 | maybe_dq_reloc = true; |
dd93cd0a AM |
9127 | break; |
9128 | ||
9129 | case elfcpp::R_POWERPC_ADDR14: | |
9130 | case elfcpp::R_POWERPC_ADDR14_BRTAKEN: | |
9131 | case elfcpp::R_POWERPC_ADDR14_BRNTAKEN: | |
9132 | case elfcpp::R_POWERPC_REL14: | |
9133 | case elfcpp::R_POWERPC_REL14_BRTAKEN: | |
9134 | case elfcpp::R_POWERPC_REL14_BRNTAKEN: | |
3ea0a085 | 9135 | status = Reloc::addr14(view, value, overflow); |
42cacb20 DE |
9136 | break; |
9137 | ||
9138 | case elfcpp::R_POWERPC_COPY: | |
9139 | case elfcpp::R_POWERPC_GLOB_DAT: | |
9140 | case elfcpp::R_POWERPC_JMP_SLOT: | |
9141 | case elfcpp::R_POWERPC_RELATIVE: | |
42cacb20 | 9142 | case elfcpp::R_POWERPC_DTPMOD: |
dd93cd0a AM |
9143 | case elfcpp::R_PPC64_JMP_IREL: |
9144 | case elfcpp::R_POWERPC_IRELATIVE: | |
42cacb20 DE |
9145 | gold_error_at_location(relinfo, relnum, rela.get_r_offset(), |
9146 | _("unexpected reloc %u in object file"), | |
9147 | r_type); | |
9148 | break; | |
9149 | ||
7e57d19e | 9150 | case elfcpp::R_PPC64_TOCSAVE: |
dd93cd0a | 9151 | if (size == 32) |
7e57d19e | 9152 | // R_PPC_EMB_SDA21 |
dd93cd0a AM |
9153 | goto unsupp; |
9154 | else | |
9155 | { | |
7e57d19e AM |
9156 | Symbol_location loc; |
9157 | loc.object = relinfo->object; | |
9158 | loc.shndx = relinfo->data_shndx; | |
9159 | loc.offset = rela.get_r_offset(); | |
9160 | Tocsave_loc::const_iterator p = target->tocsave_loc().find(loc); | |
9161 | if (p != target->tocsave_loc().end()) | |
9162 | { | |
9163 | // If we've generated plt calls using this tocsave, then | |
9164 | // the nop needs to be changed to save r2. | |
9165 | Insn* iview = reinterpret_cast<Insn*>(view); | |
9166 | if (elfcpp::Swap<32, big_endian>::readval(iview) == nop) | |
9167 | elfcpp::Swap<32, big_endian>:: | |
9168 | writeval(iview, std_2_1 + target->stk_toc()); | |
9169 | } | |
dd93cd0a AM |
9170 | } |
9171 | break; | |
9172 | ||
9173 | case elfcpp::R_PPC_EMB_SDA2I16: | |
9174 | case elfcpp::R_PPC_EMB_SDA2REL: | |
9175 | if (size == 32) | |
9176 | goto unsupp; | |
9177 | // R_PPC64_TLSGD, R_PPC64_TLSLD | |
6ce78956 AM |
9178 | break; |
9179 | ||
dd93cd0a AM |
9180 | case elfcpp::R_POWERPC_PLT32: |
9181 | case elfcpp::R_POWERPC_PLTREL32: | |
9182 | case elfcpp::R_POWERPC_PLT16_LO: | |
9183 | case elfcpp::R_POWERPC_PLT16_HI: | |
9184 | case elfcpp::R_POWERPC_PLT16_HA: | |
9185 | case elfcpp::R_PPC_SDAREL16: | |
9186 | case elfcpp::R_POWERPC_ADDR30: | |
9187 | case elfcpp::R_PPC64_PLT64: | |
9188 | case elfcpp::R_PPC64_PLTREL64: | |
9189 | case elfcpp::R_PPC64_PLTGOT16: | |
9190 | case elfcpp::R_PPC64_PLTGOT16_LO: | |
9191 | case elfcpp::R_PPC64_PLTGOT16_HI: | |
9192 | case elfcpp::R_PPC64_PLTGOT16_HA: | |
9193 | case elfcpp::R_PPC64_PLT16_LO_DS: | |
9194 | case elfcpp::R_PPC64_PLTGOT16_DS: | |
9195 | case elfcpp::R_PPC64_PLTGOT16_LO_DS: | |
dd93cd0a AM |
9196 | case elfcpp::R_PPC_EMB_RELSDA: |
9197 | case elfcpp::R_PPC_TOC16: | |
42cacb20 | 9198 | default: |
dd93cd0a | 9199 | unsupp: |
42cacb20 DE |
9200 | gold_error_at_location(relinfo, relnum, rela.get_r_offset(), |
9201 | _("unsupported reloc %u"), | |
9202 | r_type); | |
9203 | break; | |
9204 | } | |
a680de9a PB |
9205 | |
9206 | if (maybe_dq_reloc) | |
9207 | { | |
9208 | if (insn == 0) | |
9209 | insn = elfcpp::Swap<32, big_endian>::readval(iview); | |
9210 | ||
9211 | if ((insn & (0x3f << 26)) == 56u << 26 /* lq */ | |
9212 | || ((insn & (0x3f << 26)) == (61u << 26) /* lxv, stxv */ | |
9213 | && (insn & 3) == 1)) | |
9214 | status = Reloc::addr16_dq(view, value, overflow); | |
9215 | else if (size == 64 | |
9216 | || (insn & (0x3f << 26)) == 58u << 26 /* ld,ldu,lwa */ | |
9217 | || (insn & (0x3f << 26)) == 62u << 26 /* std,stdu,stq */ | |
9218 | || (insn & (0x3f << 26)) == 57u << 26 /* lfdp */ | |
9219 | || (insn & (0x3f << 26)) == 61u << 26 /* stfdp */) | |
9220 | status = Reloc::addr16_ds(view, value, overflow); | |
9221 | else | |
9222 | status = Reloc::addr16(view, value, overflow); | |
9223 | } | |
9224 | ||
0cfb0717 | 9225 | if (status != Powerpc_relocate_functions<size, big_endian>::STATUS_OK |
3ffaac20 AM |
9226 | && (has_stub_value |
9227 | || !(gsym != NULL | |
282c9750 | 9228 | && gsym->is_undefined() |
3ffaac20 | 9229 | && is_branch_reloc(r_type)))) |
0cfb0717 AM |
9230 | { |
9231 | gold_error_at_location(relinfo, relnum, rela.get_r_offset(), | |
9232 | _("relocation overflow")); | |
9233 | if (has_stub_value) | |
9234 | gold_info(_("try relinking with a smaller --stub-group-size")); | |
9235 | } | |
42cacb20 DE |
9236 | |
9237 | return true; | |
9238 | } | |
9239 | ||
42cacb20 DE |
9240 | // Relocate section data. |
9241 | ||
9242 | template<int size, bool big_endian> | |
9243 | void | |
9244 | Target_powerpc<size, big_endian>::relocate_section( | |
d83ce4e3 AM |
9245 | const Relocate_info<size, big_endian>* relinfo, |
9246 | unsigned int sh_type, | |
9247 | const unsigned char* prelocs, | |
9248 | size_t reloc_count, | |
9249 | Output_section* output_section, | |
9250 | bool needs_special_offset_handling, | |
9251 | unsigned char* view, | |
c9269dff | 9252 | Address address, |
d83ce4e3 AM |
9253 | section_size_type view_size, |
9254 | const Reloc_symbol_changes* reloc_symbol_changes) | |
42cacb20 DE |
9255 | { |
9256 | typedef Target_powerpc<size, big_endian> Powerpc; | |
9257 | typedef typename Target_powerpc<size, big_endian>::Relocate Powerpc_relocate; | |
168a4726 AM |
9258 | typedef typename Target_powerpc<size, big_endian>::Relocate_comdat_behavior |
9259 | Powerpc_comdat_behavior; | |
4d625b70 CC |
9260 | typedef gold::Default_classify_reloc<elfcpp::SHT_RELA, size, big_endian> |
9261 | Classify_reloc; | |
42cacb20 DE |
9262 | |
9263 | gold_assert(sh_type == elfcpp::SHT_RELA); | |
9264 | ||
4d625b70 CC |
9265 | gold::relocate_section<size, big_endian, Powerpc, Powerpc_relocate, |
9266 | Powerpc_comdat_behavior, Classify_reloc>( | |
42cacb20 DE |
9267 | relinfo, |
9268 | this, | |
9269 | prelocs, | |
9270 | reloc_count, | |
9271 | output_section, | |
9272 | needs_special_offset_handling, | |
9273 | view, | |
9274 | address, | |
364c7fa5 ILT |
9275 | view_size, |
9276 | reloc_symbol_changes); | |
42cacb20 DE |
9277 | } |
9278 | ||
4d625b70 | 9279 | template<int size, bool big_endian> |
cf43a2fe | 9280 | class Powerpc_scan_relocatable_reloc |
42cacb20 | 9281 | { |
cf43a2fe | 9282 | public: |
0e123f69 AM |
9283 | typedef typename elfcpp::Rela<size, big_endian> Reltype; |
9284 | static const int reloc_size = elfcpp::Elf_sizes<size>::rela_size; | |
4d625b70 CC |
9285 | static const int sh_type = elfcpp::SHT_RELA; |
9286 | ||
9287 | // Return the symbol referred to by the relocation. | |
9288 | static inline unsigned int | |
9289 | get_r_sym(const Reltype* reloc) | |
9290 | { return elfcpp::elf_r_sym<size>(reloc->get_r_info()); } | |
9291 | ||
9292 | // Return the type of the relocation. | |
9293 | static inline unsigned int | |
9294 | get_r_type(const Reltype* reloc) | |
9295 | { return elfcpp::elf_r_type<size>(reloc->get_r_info()); } | |
9296 | ||
cf43a2fe AM |
9297 | // Return the strategy to use for a local symbol which is not a |
9298 | // section symbol, given the relocation type. | |
9299 | inline Relocatable_relocs::Reloc_strategy | |
9300 | local_non_section_strategy(unsigned int r_type, Relobj*, unsigned int r_sym) | |
9301 | { | |
9302 | if (r_type == 0 && r_sym == 0) | |
9303 | return Relocatable_relocs::RELOC_DISCARD; | |
9304 | return Relocatable_relocs::RELOC_COPY; | |
9305 | } | |
9306 | ||
9307 | // Return the strategy to use for a local symbol which is a section | |
9308 | // symbol, given the relocation type. | |
9309 | inline Relocatable_relocs::Reloc_strategy | |
9310 | local_section_strategy(unsigned int, Relobj*) | |
9311 | { | |
9312 | return Relocatable_relocs::RELOC_ADJUST_FOR_SECTION_RELA; | |
9313 | } | |
9314 | ||
9315 | // Return the strategy to use for a global symbol, given the | |
9316 | // relocation type, the object, and the symbol index. | |
9317 | inline Relocatable_relocs::Reloc_strategy | |
9318 | global_strategy(unsigned int r_type, Relobj*, unsigned int) | |
9319 | { | |
9320 | if (r_type == elfcpp::R_PPC_PLTREL24) | |
9321 | return Relocatable_relocs::RELOC_SPECIAL; | |
9322 | return Relocatable_relocs::RELOC_COPY; | |
9323 | } | |
9324 | }; | |
42cacb20 DE |
9325 | |
9326 | // Scan the relocs during a relocatable link. | |
9327 | ||
9328 | template<int size, bool big_endian> | |
9329 | void | |
9330 | Target_powerpc<size, big_endian>::scan_relocatable_relocs( | |
d83ce4e3 AM |
9331 | Symbol_table* symtab, |
9332 | Layout* layout, | |
9333 | Sized_relobj_file<size, big_endian>* object, | |
9334 | unsigned int data_shndx, | |
9335 | unsigned int sh_type, | |
9336 | const unsigned char* prelocs, | |
9337 | size_t reloc_count, | |
9338 | Output_section* output_section, | |
9339 | bool needs_special_offset_handling, | |
9340 | size_t local_symbol_count, | |
9341 | const unsigned char* plocal_symbols, | |
9342 | Relocatable_relocs* rr) | |
42cacb20 | 9343 | { |
4d625b70 CC |
9344 | typedef Powerpc_scan_relocatable_reloc<size, big_endian> Scan_strategy; |
9345 | ||
42cacb20 DE |
9346 | gold_assert(sh_type == elfcpp::SHT_RELA); |
9347 | ||
4d625b70 | 9348 | gold::scan_relocatable_relocs<size, big_endian, Scan_strategy>( |
42cacb20 DE |
9349 | symtab, |
9350 | layout, | |
9351 | object, | |
9352 | data_shndx, | |
9353 | prelocs, | |
9354 | reloc_count, | |
9355 | output_section, | |
9356 | needs_special_offset_handling, | |
9357 | local_symbol_count, | |
9358 | plocal_symbols, | |
9359 | rr); | |
9360 | } | |
9361 | ||
4d625b70 CC |
9362 | // Scan the relocs for --emit-relocs. |
9363 | ||
9364 | template<int size, bool big_endian> | |
9365 | void | |
9366 | Target_powerpc<size, big_endian>::emit_relocs_scan( | |
9367 | Symbol_table* symtab, | |
9368 | Layout* layout, | |
9369 | Sized_relobj_file<size, big_endian>* object, | |
9370 | unsigned int data_shndx, | |
9371 | unsigned int sh_type, | |
9372 | const unsigned char* prelocs, | |
9373 | size_t reloc_count, | |
9374 | Output_section* output_section, | |
9375 | bool needs_special_offset_handling, | |
9376 | size_t local_symbol_count, | |
9377 | const unsigned char* plocal_syms, | |
9378 | Relocatable_relocs* rr) | |
9379 | { | |
9380 | typedef gold::Default_classify_reloc<elfcpp::SHT_RELA, size, big_endian> | |
9381 | Classify_reloc; | |
9382 | typedef gold::Default_emit_relocs_strategy<Classify_reloc> | |
9383 | Emit_relocs_strategy; | |
9384 | ||
9385 | gold_assert(sh_type == elfcpp::SHT_RELA); | |
9386 | ||
9387 | gold::scan_relocatable_relocs<size, big_endian, Emit_relocs_strategy>( | |
9388 | symtab, | |
9389 | layout, | |
9390 | object, | |
9391 | data_shndx, | |
9392 | prelocs, | |
9393 | reloc_count, | |
9394 | output_section, | |
9395 | needs_special_offset_handling, | |
9396 | local_symbol_count, | |
9397 | plocal_syms, | |
9398 | rr); | |
9399 | } | |
9400 | ||
7404fe1b | 9401 | // Emit relocations for a section. |
dd93cd0a AM |
9402 | // This is a modified version of the function by the same name in |
9403 | // target-reloc.h. Using relocate_special_relocatable for | |
9404 | // R_PPC_PLTREL24 would require duplication of the entire body of the | |
9405 | // loop, so we may as well duplicate the whole thing. | |
42cacb20 DE |
9406 | |
9407 | template<int size, bool big_endian> | |
9408 | void | |
7404fe1b | 9409 | Target_powerpc<size, big_endian>::relocate_relocs( |
42cacb20 DE |
9410 | const Relocate_info<size, big_endian>* relinfo, |
9411 | unsigned int sh_type, | |
9412 | const unsigned char* prelocs, | |
9413 | size_t reloc_count, | |
9414 | Output_section* output_section, | |
62fe925a | 9415 | typename elfcpp::Elf_types<size>::Elf_Off offset_in_output_section, |
cf43a2fe | 9416 | unsigned char*, |
dd93cd0a | 9417 | Address view_address, |
cf43a2fe | 9418 | section_size_type, |
42cacb20 DE |
9419 | unsigned char* reloc_view, |
9420 | section_size_type reloc_view_size) | |
9421 | { | |
9422 | gold_assert(sh_type == elfcpp::SHT_RELA); | |
9423 | ||
0e123f69 AM |
9424 | typedef typename elfcpp::Rela<size, big_endian> Reltype; |
9425 | typedef typename elfcpp::Rela_write<size, big_endian> Reltype_write; | |
9426 | const int reloc_size = elfcpp::Elf_sizes<size>::rela_size; | |
dcfc7dd4 AM |
9427 | // Offset from start of insn to d-field reloc. |
9428 | const int d_offset = big_endian ? 2 : 0; | |
cf43a2fe AM |
9429 | |
9430 | Powerpc_relobj<size, big_endian>* const object | |
9431 | = static_cast<Powerpc_relobj<size, big_endian>*>(relinfo->object); | |
9432 | const unsigned int local_count = object->local_symbol_count(); | |
9433 | unsigned int got2_shndx = object->got2_shndx(); | |
c9269dff | 9434 | Address got2_addend = 0; |
cf43a2fe | 9435 | if (got2_shndx != 0) |
c9269dff AM |
9436 | { |
9437 | got2_addend = object->get_output_section_offset(got2_shndx); | |
9438 | gold_assert(got2_addend != invalid_address); | |
9439 | } | |
cf43a2fe AM |
9440 | |
9441 | unsigned char* pwrite = reloc_view; | |
7404fe1b | 9442 | bool zap_next = false; |
cf43a2fe AM |
9443 | for (size_t i = 0; i < reloc_count; ++i, prelocs += reloc_size) |
9444 | { | |
91a65d2f | 9445 | Relocatable_relocs::Reloc_strategy strategy = relinfo->rr->strategy(i); |
cf43a2fe AM |
9446 | if (strategy == Relocatable_relocs::RELOC_DISCARD) |
9447 | continue; | |
9448 | ||
9449 | Reltype reloc(prelocs); | |
9450 | Reltype_write reloc_write(pwrite); | |
9451 | ||
7404fe1b | 9452 | Address offset = reloc.get_r_offset(); |
cf43a2fe | 9453 | typename elfcpp::Elf_types<size>::Elf_WXword r_info = reloc.get_r_info(); |
7404fe1b AM |
9454 | unsigned int r_sym = elfcpp::elf_r_sym<size>(r_info); |
9455 | unsigned int r_type = elfcpp::elf_r_type<size>(r_info); | |
9456 | const unsigned int orig_r_sym = r_sym; | |
9457 | typename elfcpp::Elf_types<size>::Elf_Swxword addend | |
9458 | = reloc.get_r_addend(); | |
9459 | const Symbol* gsym = NULL; | |
9460 | ||
9461 | if (zap_next) | |
9462 | { | |
9463 | // We could arrange to discard these and other relocs for | |
9464 | // tls optimised sequences in the strategy methods, but for | |
9465 | // now do as BFD ld does. | |
9466 | r_type = elfcpp::R_POWERPC_NONE; | |
9467 | zap_next = false; | |
9468 | } | |
cf43a2fe AM |
9469 | |
9470 | // Get the new symbol index. | |
9215b98b | 9471 | Output_section* os = NULL; |
cf43a2fe AM |
9472 | if (r_sym < local_count) |
9473 | { | |
9474 | switch (strategy) | |
9475 | { | |
9476 | case Relocatable_relocs::RELOC_COPY: | |
9477 | case Relocatable_relocs::RELOC_SPECIAL: | |
7404fe1b | 9478 | if (r_sym != 0) |
dd93cd0a | 9479 | { |
7404fe1b AM |
9480 | r_sym = object->symtab_index(r_sym); |
9481 | gold_assert(r_sym != -1U); | |
dd93cd0a | 9482 | } |
cf43a2fe AM |
9483 | break; |
9484 | ||
9485 | case Relocatable_relocs::RELOC_ADJUST_FOR_SECTION_RELA: | |
9486 | { | |
9487 | // We are adjusting a section symbol. We need to find | |
9488 | // the symbol table index of the section symbol for | |
9489 | // the output section corresponding to input section | |
9490 | // in which this symbol is defined. | |
9491 | gold_assert(r_sym < local_count); | |
9492 | bool is_ordinary; | |
9493 | unsigned int shndx = | |
9494 | object->local_symbol_input_shndx(r_sym, &is_ordinary); | |
9495 | gold_assert(is_ordinary); | |
9215b98b | 9496 | os = object->output_section(shndx); |
cf43a2fe AM |
9497 | gold_assert(os != NULL); |
9498 | gold_assert(os->needs_symtab_index()); | |
7404fe1b | 9499 | r_sym = os->symtab_index(); |
cf43a2fe AM |
9500 | } |
9501 | break; | |
9502 | ||
9503 | default: | |
9504 | gold_unreachable(); | |
9505 | } | |
9506 | } | |
9507 | else | |
9508 | { | |
7404fe1b | 9509 | gsym = object->global_symbol(r_sym); |
cf43a2fe AM |
9510 | gold_assert(gsym != NULL); |
9511 | if (gsym->is_forwarder()) | |
9512 | gsym = relinfo->symtab->resolve_forwards(gsym); | |
9513 | ||
9514 | gold_assert(gsym->has_symtab_index()); | |
7404fe1b | 9515 | r_sym = gsym->symtab_index(); |
cf43a2fe AM |
9516 | } |
9517 | ||
9518 | // Get the new offset--the location in the output section where | |
9519 | // this relocation should be applied. | |
cf43a2fe | 9520 | if (static_cast<Address>(offset_in_output_section) != invalid_address) |
7404fe1b | 9521 | offset += offset_in_output_section; |
cf43a2fe AM |
9522 | else |
9523 | { | |
c9269dff AM |
9524 | section_offset_type sot_offset = |
9525 | convert_types<section_offset_type, Address>(offset); | |
cf43a2fe | 9526 | section_offset_type new_sot_offset = |
c9269dff AM |
9527 | output_section->output_offset(object, relinfo->data_shndx, |
9528 | sot_offset); | |
cf43a2fe | 9529 | gold_assert(new_sot_offset != -1); |
7404fe1b | 9530 | offset = new_sot_offset; |
cf43a2fe AM |
9531 | } |
9532 | ||
dd93cd0a AM |
9533 | // In an object file, r_offset is an offset within the section. |
9534 | // In an executable or dynamic object, generated by | |
9535 | // --emit-relocs, r_offset is an absolute address. | |
7404fe1b | 9536 | if (!parameters->options().relocatable()) |
dd93cd0a | 9537 | { |
7404fe1b | 9538 | offset += view_address; |
dd93cd0a | 9539 | if (static_cast<Address>(offset_in_output_section) != invalid_address) |
7404fe1b | 9540 | offset -= offset_in_output_section; |
dd93cd0a AM |
9541 | } |
9542 | ||
cf43a2fe | 9543 | // Handle the reloc addend based on the strategy. |
cf43a2fe AM |
9544 | if (strategy == Relocatable_relocs::RELOC_COPY) |
9545 | ; | |
9546 | else if (strategy == Relocatable_relocs::RELOC_ADJUST_FOR_SECTION_RELA) | |
9547 | { | |
7404fe1b | 9548 | const Symbol_value<size>* psymval = object->local_symbol(orig_r_sym); |
9215b98b AM |
9549 | gold_assert(os != NULL); |
9550 | addend = psymval->value(object, addend) - os->address(); | |
cf43a2fe AM |
9551 | } |
9552 | else if (strategy == Relocatable_relocs::RELOC_SPECIAL) | |
9553 | { | |
e3a7574e AM |
9554 | if (size == 32) |
9555 | { | |
9556 | if (addend >= 32768) | |
9557 | addend += got2_addend; | |
9558 | } | |
9559 | else if (r_type == elfcpp::R_POWERPC_REL16_HA) | |
9560 | { | |
9561 | r_type = elfcpp::R_POWERPC_ADDR16_HA; | |
dcfc7dd4 | 9562 | addend -= d_offset; |
e3a7574e AM |
9563 | } |
9564 | else if (r_type == elfcpp::R_POWERPC_REL16_LO) | |
9565 | { | |
9566 | r_type = elfcpp::R_POWERPC_ADDR16_LO; | |
dcfc7dd4 | 9567 | addend -= d_offset + 4; |
e3a7574e | 9568 | } |
cf43a2fe AM |
9569 | } |
9570 | else | |
9571 | gold_unreachable(); | |
9572 | ||
7404fe1b AM |
9573 | if (!parameters->options().relocatable()) |
9574 | { | |
9575 | if (r_type == elfcpp::R_POWERPC_GOT_TLSGD16 | |
9576 | || r_type == elfcpp::R_POWERPC_GOT_TLSGD16_LO | |
9577 | || r_type == elfcpp::R_POWERPC_GOT_TLSGD16_HI | |
9578 | || r_type == elfcpp::R_POWERPC_GOT_TLSGD16_HA) | |
9579 | { | |
9580 | // First instruction of a global dynamic sequence, | |
9581 | // arg setup insn. | |
9582 | const bool final = gsym == NULL || gsym->final_value_is_known(); | |
9583 | switch (this->optimize_tls_gd(final)) | |
9584 | { | |
9585 | case tls::TLSOPT_TO_IE: | |
9586 | r_type += (elfcpp::R_POWERPC_GOT_TPREL16 | |
9587 | - elfcpp::R_POWERPC_GOT_TLSGD16); | |
9588 | break; | |
9589 | case tls::TLSOPT_TO_LE: | |
9590 | if (r_type == elfcpp::R_POWERPC_GOT_TLSGD16 | |
9591 | || r_type == elfcpp::R_POWERPC_GOT_TLSGD16_LO) | |
9592 | r_type = elfcpp::R_POWERPC_TPREL16_HA; | |
9593 | else | |
9594 | { | |
9595 | r_type = elfcpp::R_POWERPC_NONE; | |
dcfc7dd4 | 9596 | offset -= d_offset; |
7404fe1b AM |
9597 | } |
9598 | break; | |
9599 | default: | |
9600 | break; | |
9601 | } | |
9602 | } | |
9603 | else if (r_type == elfcpp::R_POWERPC_GOT_TLSLD16 | |
9604 | || r_type == elfcpp::R_POWERPC_GOT_TLSLD16_LO | |
9605 | || r_type == elfcpp::R_POWERPC_GOT_TLSLD16_HI | |
9606 | || r_type == elfcpp::R_POWERPC_GOT_TLSLD16_HA) | |
9607 | { | |
9608 | // First instruction of a local dynamic sequence, | |
9609 | // arg setup insn. | |
9610 | if (this->optimize_tls_ld() == tls::TLSOPT_TO_LE) | |
9611 | { | |
9612 | if (r_type == elfcpp::R_POWERPC_GOT_TLSLD16 | |
9613 | || r_type == elfcpp::R_POWERPC_GOT_TLSLD16_LO) | |
9614 | { | |
9615 | r_type = elfcpp::R_POWERPC_TPREL16_HA; | |
9616 | const Output_section* os = relinfo->layout->tls_segment() | |
9617 | ->first_section(); | |
9618 | gold_assert(os != NULL); | |
9619 | gold_assert(os->needs_symtab_index()); | |
9620 | r_sym = os->symtab_index(); | |
9621 | addend = dtp_offset; | |
9622 | } | |
9623 | else | |
9624 | { | |
9625 | r_type = elfcpp::R_POWERPC_NONE; | |
dcfc7dd4 | 9626 | offset -= d_offset; |
7404fe1b AM |
9627 | } |
9628 | } | |
9629 | } | |
9630 | else if (r_type == elfcpp::R_POWERPC_GOT_TPREL16 | |
9631 | || r_type == elfcpp::R_POWERPC_GOT_TPREL16_LO | |
9632 | || r_type == elfcpp::R_POWERPC_GOT_TPREL16_HI | |
9633 | || r_type == elfcpp::R_POWERPC_GOT_TPREL16_HA) | |
9634 | { | |
9635 | // First instruction of initial exec sequence. | |
9636 | const bool final = gsym == NULL || gsym->final_value_is_known(); | |
9637 | if (this->optimize_tls_ie(final) == tls::TLSOPT_TO_LE) | |
9638 | { | |
9639 | if (r_type == elfcpp::R_POWERPC_GOT_TPREL16 | |
9640 | || r_type == elfcpp::R_POWERPC_GOT_TPREL16_LO) | |
9641 | r_type = elfcpp::R_POWERPC_TPREL16_HA; | |
9642 | else | |
9643 | { | |
9644 | r_type = elfcpp::R_POWERPC_NONE; | |
dcfc7dd4 | 9645 | offset -= d_offset; |
7404fe1b AM |
9646 | } |
9647 | } | |
9648 | } | |
9649 | else if ((size == 64 && r_type == elfcpp::R_PPC64_TLSGD) | |
9650 | || (size == 32 && r_type == elfcpp::R_PPC_TLSGD)) | |
9651 | { | |
9652 | // Second instruction of a global dynamic sequence, | |
9653 | // the __tls_get_addr call | |
9654 | const bool final = gsym == NULL || gsym->final_value_is_known(); | |
9655 | switch (this->optimize_tls_gd(final)) | |
9656 | { | |
9657 | case tls::TLSOPT_TO_IE: | |
9658 | r_type = elfcpp::R_POWERPC_NONE; | |
9659 | zap_next = true; | |
9660 | break; | |
9661 | case tls::TLSOPT_TO_LE: | |
9662 | r_type = elfcpp::R_POWERPC_TPREL16_LO; | |
dcfc7dd4 | 9663 | offset += d_offset; |
7404fe1b AM |
9664 | zap_next = true; |
9665 | break; | |
9666 | default: | |
9667 | break; | |
9668 | } | |
9669 | } | |
9670 | else if ((size == 64 && r_type == elfcpp::R_PPC64_TLSLD) | |
9671 | || (size == 32 && r_type == elfcpp::R_PPC_TLSLD)) | |
9672 | { | |
9673 | // Second instruction of a local dynamic sequence, | |
9674 | // the __tls_get_addr call | |
9675 | if (this->optimize_tls_ld() == tls::TLSOPT_TO_LE) | |
9676 | { | |
9677 | const Output_section* os = relinfo->layout->tls_segment() | |
9678 | ->first_section(); | |
9679 | gold_assert(os != NULL); | |
9680 | gold_assert(os->needs_symtab_index()); | |
9681 | r_sym = os->symtab_index(); | |
9682 | addend = dtp_offset; | |
9683 | r_type = elfcpp::R_POWERPC_TPREL16_LO; | |
dcfc7dd4 | 9684 | offset += d_offset; |
7404fe1b AM |
9685 | zap_next = true; |
9686 | } | |
9687 | } | |
9688 | else if (r_type == elfcpp::R_POWERPC_TLS) | |
9689 | { | |
9690 | // Second instruction of an initial exec sequence | |
9691 | const bool final = gsym == NULL || gsym->final_value_is_known(); | |
9692 | if (this->optimize_tls_ie(final) == tls::TLSOPT_TO_LE) | |
9693 | { | |
9694 | r_type = elfcpp::R_POWERPC_TPREL16_LO; | |
dcfc7dd4 | 9695 | offset += d_offset; |
7404fe1b AM |
9696 | } |
9697 | } | |
9698 | } | |
9699 | ||
9700 | reloc_write.put_r_offset(offset); | |
9701 | reloc_write.put_r_info(elfcpp::elf_r_info<size>(r_sym, r_type)); | |
9702 | reloc_write.put_r_addend(addend); | |
cf43a2fe AM |
9703 | |
9704 | pwrite += reloc_size; | |
9705 | } | |
9706 | ||
9707 | gold_assert(static_cast<section_size_type>(pwrite - reloc_view) | |
9708 | == reloc_view_size); | |
42cacb20 DE |
9709 | } |
9710 | ||
ec661b9d | 9711 | // Return the value to use for a dynamic symbol which requires special |
42cacb20 DE |
9712 | // treatment. This is how we support equality comparisons of function |
9713 | // pointers across shared library boundaries, as described in the | |
9714 | // processor specific ABI supplement. | |
9715 | ||
9716 | template<int size, bool big_endian> | |
9717 | uint64_t | |
9718 | Target_powerpc<size, big_endian>::do_dynsym_value(const Symbol* gsym) const | |
9719 | { | |
cf43a2fe AM |
9720 | if (size == 32) |
9721 | { | |
9722 | gold_assert(gsym->is_from_dynobj() && gsym->has_plt_offset()); | |
ec661b9d AM |
9723 | for (typename Stub_tables::const_iterator p = this->stub_tables_.begin(); |
9724 | p != this->stub_tables_.end(); | |
9725 | ++p) | |
9726 | { | |
7e57d19e AM |
9727 | const typename Stub_table<size, big_endian>::Plt_stub_ent* ent |
9728 | = (*p)->find_plt_call_entry(gsym); | |
9729 | if (ent != NULL) | |
9730 | return (*p)->stub_address() + ent->off_; | |
ec661b9d | 9731 | } |
c9824451 | 9732 | } |
9055360d AM |
9733 | else if (this->abiversion() >= 2) |
9734 | { | |
faa2211d AM |
9735 | Address off = this->glink_section()->find_global_entry(gsym); |
9736 | if (off != invalid_address) | |
9055360d AM |
9737 | return this->glink_section()->global_entry_address() + off; |
9738 | } | |
ec661b9d | 9739 | gold_unreachable(); |
c9824451 AM |
9740 | } |
9741 | ||
9742 | // Return the PLT address to use for a local symbol. | |
9743 | template<int size, bool big_endian> | |
9744 | uint64_t | |
9745 | Target_powerpc<size, big_endian>::do_plt_address_for_local( | |
9746 | const Relobj* object, | |
9747 | unsigned int symndx) const | |
9748 | { | |
9749 | if (size == 32) | |
9750 | { | |
9751 | const Sized_relobj<size, big_endian>* relobj | |
9752 | = static_cast<const Sized_relobj<size, big_endian>*>(object); | |
ec661b9d AM |
9753 | for (typename Stub_tables::const_iterator p = this->stub_tables_.begin(); |
9754 | p != this->stub_tables_.end(); | |
9755 | ++p) | |
9756 | { | |
7e57d19e AM |
9757 | const typename Stub_table<size, big_endian>::Plt_stub_ent* ent |
9758 | = (*p)->find_plt_call_entry(relobj->sized_relobj(), symndx); | |
9759 | if (ent != NULL) | |
9760 | return (*p)->stub_address() + ent->off_; | |
ec661b9d | 9761 | } |
c9824451 | 9762 | } |
ec661b9d | 9763 | gold_unreachable(); |
c9824451 AM |
9764 | } |
9765 | ||
9766 | // Return the PLT address to use for a global symbol. | |
9767 | template<int size, bool big_endian> | |
9768 | uint64_t | |
9769 | Target_powerpc<size, big_endian>::do_plt_address_for_global( | |
9770 | const Symbol* gsym) const | |
9771 | { | |
9772 | if (size == 32) | |
9773 | { | |
ec661b9d AM |
9774 | for (typename Stub_tables::const_iterator p = this->stub_tables_.begin(); |
9775 | p != this->stub_tables_.end(); | |
9776 | ++p) | |
9777 | { | |
7e57d19e AM |
9778 | const typename Stub_table<size, big_endian>::Plt_stub_ent* ent |
9779 | = (*p)->find_plt_call_entry(gsym); | |
9780 | if (ent != NULL) | |
9781 | return (*p)->stub_address() + ent->off_; | |
ec661b9d | 9782 | } |
cf43a2fe | 9783 | } |
9055360d AM |
9784 | else if (this->abiversion() >= 2) |
9785 | { | |
faa2211d AM |
9786 | Address off = this->glink_section()->find_global_entry(gsym); |
9787 | if (off != invalid_address) | |
9055360d AM |
9788 | return this->glink_section()->global_entry_address() + off; |
9789 | } | |
ec661b9d | 9790 | gold_unreachable(); |
42cacb20 DE |
9791 | } |
9792 | ||
bd73a62d AM |
9793 | // Return the offset to use for the GOT_INDX'th got entry which is |
9794 | // for a local tls symbol specified by OBJECT, SYMNDX. | |
9795 | template<int size, bool big_endian> | |
9796 | int64_t | |
9797 | Target_powerpc<size, big_endian>::do_tls_offset_for_local( | |
9798 | const Relobj* object, | |
9799 | unsigned int symndx, | |
9800 | unsigned int got_indx) const | |
9801 | { | |
9802 | const Powerpc_relobj<size, big_endian>* ppc_object | |
9803 | = static_cast<const Powerpc_relobj<size, big_endian>*>(object); | |
9804 | if (ppc_object->local_symbol(symndx)->is_tls_symbol()) | |
9805 | { | |
9806 | for (Got_type got_type = GOT_TYPE_TLSGD; | |
9807 | got_type <= GOT_TYPE_TPREL; | |
9808 | got_type = Got_type(got_type + 1)) | |
9809 | if (ppc_object->local_has_got_offset(symndx, got_type)) | |
9810 | { | |
9811 | unsigned int off = ppc_object->local_got_offset(symndx, got_type); | |
9812 | if (got_type == GOT_TYPE_TLSGD) | |
9813 | off += size / 8; | |
9814 | if (off == got_indx * (size / 8)) | |
9815 | { | |
9816 | if (got_type == GOT_TYPE_TPREL) | |
9817 | return -tp_offset; | |
9818 | else | |
9819 | return -dtp_offset; | |
9820 | } | |
9821 | } | |
9822 | } | |
9823 | gold_unreachable(); | |
9824 | } | |
9825 | ||
9826 | // Return the offset to use for the GOT_INDX'th got entry which is | |
9827 | // for global tls symbol GSYM. | |
9828 | template<int size, bool big_endian> | |
9829 | int64_t | |
9830 | Target_powerpc<size, big_endian>::do_tls_offset_for_global( | |
9831 | Symbol* gsym, | |
9832 | unsigned int got_indx) const | |
9833 | { | |
9834 | if (gsym->type() == elfcpp::STT_TLS) | |
9835 | { | |
9836 | for (Got_type got_type = GOT_TYPE_TLSGD; | |
9837 | got_type <= GOT_TYPE_TPREL; | |
9838 | got_type = Got_type(got_type + 1)) | |
9839 | if (gsym->has_got_offset(got_type)) | |
9840 | { | |
9841 | unsigned int off = gsym->got_offset(got_type); | |
9842 | if (got_type == GOT_TYPE_TLSGD) | |
9843 | off += size / 8; | |
9844 | if (off == got_indx * (size / 8)) | |
9845 | { | |
9846 | if (got_type == GOT_TYPE_TPREL) | |
9847 | return -tp_offset; | |
9848 | else | |
9849 | return -dtp_offset; | |
9850 | } | |
9851 | } | |
9852 | } | |
9853 | gold_unreachable(); | |
9854 | } | |
9855 | ||
42cacb20 DE |
9856 | // The selector for powerpc object files. |
9857 | ||
9858 | template<int size, bool big_endian> | |
9859 | class Target_selector_powerpc : public Target_selector | |
9860 | { | |
9861 | public: | |
9862 | Target_selector_powerpc() | |
edc27beb AM |
9863 | : Target_selector(size == 64 ? elfcpp::EM_PPC64 : elfcpp::EM_PPC, |
9864 | size, big_endian, | |
03ef7571 ILT |
9865 | (size == 64 |
9866 | ? (big_endian ? "elf64-powerpc" : "elf64-powerpcle") | |
9867 | : (big_endian ? "elf32-powerpc" : "elf32-powerpcle")), | |
9868 | (size == 64 | |
9869 | ? (big_endian ? "elf64ppc" : "elf64lppc") | |
9870 | : (big_endian ? "elf32ppc" : "elf32lppc"))) | |
42cacb20 DE |
9871 | { } |
9872 | ||
2e702c99 RM |
9873 | virtual Target* |
9874 | do_instantiate_target() | |
7f055c20 | 9875 | { return new Target_powerpc<size, big_endian>(); } |
42cacb20 DE |
9876 | }; |
9877 | ||
9878 | Target_selector_powerpc<32, true> target_selector_ppc32; | |
9879 | Target_selector_powerpc<32, false> target_selector_ppc32le; | |
9880 | Target_selector_powerpc<64, true> target_selector_ppc64; | |
9881 | Target_selector_powerpc<64, false> target_selector_ppc64le; | |
9882 | ||
decdd3bc AM |
9883 | // Instantiate these constants for -O0 |
9884 | template<int size, bool big_endian> | |
9885 | const int Output_data_glink<size, big_endian>::pltresolve_size; | |
9886 | template<int size, bool big_endian> | |
9055360d AM |
9887 | const typename Output_data_glink<size, big_endian>::Address |
9888 | Output_data_glink<size, big_endian>::invalid_address; | |
9889 | template<int size, bool big_endian> | |
decdd3bc AM |
9890 | const typename Stub_table<size, big_endian>::Address |
9891 | Stub_table<size, big_endian>::invalid_address; | |
9892 | template<int size, bool big_endian> | |
9893 | const typename Target_powerpc<size, big_endian>::Address | |
9894 | Target_powerpc<size, big_endian>::invalid_address; | |
9895 | ||
42cacb20 | 9896 | } // End anonymous namespace. |