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42cacb20 DE |
1 | // powerpc.cc -- powerpc target support for gold. |
2 | ||
219d1afa | 3 | // Copyright (C) 2008-2018 Free Software Foundation, Inc. |
42cacb20 DE |
4 | // Written by David S. Miller <davem@davemloft.net> |
5 | // and David Edelsohn <edelsohn@gnu.org> | |
6 | ||
7 | // This file is part of gold. | |
8 | ||
9 | // This program is free software; you can redistribute it and/or modify | |
10 | // it under the terms of the GNU General Public License as published by | |
11 | // the Free Software Foundation; either version 3 of the License, or | |
12 | // (at your option) any later version. | |
13 | ||
14 | // This program is distributed in the hope that it will be useful, | |
15 | // but WITHOUT ANY WARRANTY; without even the implied warranty of | |
16 | // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
17 | // GNU General Public License for more details. | |
18 | ||
19 | // You should have received a copy of the GNU General Public License | |
20 | // along with this program; if not, write to the Free Software | |
21 | // Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston, | |
22 | // MA 02110-1301, USA. | |
23 | ||
24 | #include "gold.h" | |
25 | ||
dc3714f3 | 26 | #include <set> |
ec661b9d | 27 | #include <algorithm> |
42cacb20 | 28 | #include "elfcpp.h" |
9d5781f8 | 29 | #include "dwarf.h" |
42cacb20 DE |
30 | #include "parameters.h" |
31 | #include "reloc.h" | |
32 | #include "powerpc.h" | |
33 | #include "object.h" | |
34 | #include "symtab.h" | |
35 | #include "layout.h" | |
36 | #include "output.h" | |
37 | #include "copy-relocs.h" | |
38 | #include "target.h" | |
39 | #include "target-reloc.h" | |
40 | #include "target-select.h" | |
41 | #include "tls.h" | |
42 | #include "errors.h" | |
f345227a | 43 | #include "gc.h" |
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), | |
2d7ad24e | 610 | got_(NULL), plt_(NULL), iplt_(NULL), lplt_(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), | |
34e0882b | 616 | has_tls_get_addr_opt_(false), |
7ee7ff70 | 617 | relax_failed_(false), relax_fail_count_(0), |
34e0882b AM |
618 | stub_group_size_(0), savres_section_(0), |
619 | tls_get_addr_(NULL), tls_get_addr_opt_(NULL) | |
42cacb20 DE |
620 | { |
621 | } | |
622 | ||
2e702c99 | 623 | // Process the relocations to determine unreferenced sections for |
6d03d481 ST |
624 | // garbage collection. |
625 | void | |
ad0f2072 | 626 | gc_process_relocs(Symbol_table* symtab, |
2e702c99 RM |
627 | Layout* layout, |
628 | Sized_relobj_file<size, big_endian>* object, | |
629 | unsigned int data_shndx, | |
630 | unsigned int sh_type, | |
631 | const unsigned char* prelocs, | |
632 | size_t reloc_count, | |
633 | Output_section* output_section, | |
634 | bool needs_special_offset_handling, | |
635 | size_t local_symbol_count, | |
636 | const unsigned char* plocal_symbols); | |
6d03d481 | 637 | |
42cacb20 DE |
638 | // Scan the relocations to look for symbol adjustments. |
639 | void | |
ad0f2072 | 640 | scan_relocs(Symbol_table* symtab, |
42cacb20 | 641 | Layout* layout, |
6fa2a40b | 642 | Sized_relobj_file<size, big_endian>* object, |
42cacb20 DE |
643 | unsigned int data_shndx, |
644 | unsigned int sh_type, | |
645 | const unsigned char* prelocs, | |
646 | size_t reloc_count, | |
647 | Output_section* output_section, | |
648 | bool needs_special_offset_handling, | |
649 | size_t local_symbol_count, | |
650 | const unsigned char* plocal_symbols); | |
921b5322 AM |
651 | |
652 | // Map input .toc section to output .got section. | |
653 | const char* | |
654 | do_output_section_name(const Relobj*, const char* name, size_t* plen) const | |
655 | { | |
656 | if (size == 64 && strcmp(name, ".toc") == 0) | |
657 | { | |
658 | *plen = 4; | |
659 | return ".got"; | |
660 | } | |
661 | return NULL; | |
662 | } | |
663 | ||
f3a0ed29 AM |
664 | // Provide linker defined save/restore functions. |
665 | void | |
666 | define_save_restore_funcs(Layout*, Symbol_table*); | |
667 | ||
ec661b9d AM |
668 | // No stubs unless a final link. |
669 | bool | |
670 | do_may_relax() const | |
671 | { return !parameters->options().relocatable(); } | |
672 | ||
673 | bool | |
674 | do_relax(int, const Input_objects*, Symbol_table*, Layout*, const Task*); | |
675 | ||
9d5781f8 AM |
676 | void |
677 | do_plt_fde_location(const Output_data*, unsigned char*, | |
678 | uint64_t*, off_t*) const; | |
679 | ||
ec661b9d AM |
680 | // Stash info about branches, for stub generation. |
681 | void | |
682 | push_branch(Powerpc_relobj<size, big_endian>* ppc_object, | |
683 | unsigned int data_shndx, Address r_offset, | |
684 | unsigned int r_type, unsigned int r_sym, Address addend) | |
685 | { | |
686 | Branch_info info(ppc_object, data_shndx, r_offset, r_type, r_sym, addend); | |
687 | this->branch_info_.push_back(info); | |
688 | if (r_type == elfcpp::R_POWERPC_REL14 | |
689 | || r_type == elfcpp::R_POWERPC_REL14_BRTAKEN | |
690 | || r_type == elfcpp::R_POWERPC_REL14_BRNTAKEN) | |
691 | ppc_object->set_has_14bit_branch(data_shndx); | |
692 | } | |
693 | ||
7e57d19e AM |
694 | // Return whether the last branch is a plt call, and if so, mark the |
695 | // branch as having an R_PPC64_TOCSAVE. | |
696 | bool | |
697 | mark_pltcall(Powerpc_relobj<size, big_endian>* ppc_object, | |
698 | unsigned int data_shndx, Address r_offset, Symbol_table* symtab) | |
699 | { | |
700 | return (size == 64 | |
701 | && !this->branch_info_.empty() | |
702 | && this->branch_info_.back().mark_pltcall(ppc_object, data_shndx, | |
703 | r_offset, this, symtab)); | |
704 | } | |
705 | ||
706 | // Say the given location, that of a nop in a function prologue with | |
707 | // an R_PPC64_TOCSAVE reloc, will be used to save r2. | |
708 | // R_PPC64_TOCSAVE relocs on nops following calls point at this nop. | |
709 | void | |
710 | add_tocsave(Powerpc_relobj<size, big_endian>* ppc_object, | |
711 | unsigned int shndx, Address offset) | |
712 | { | |
713 | Symbol_location loc; | |
714 | loc.object = ppc_object; | |
715 | loc.shndx = shndx; | |
716 | loc.offset = offset; | |
717 | this->tocsave_loc_.insert(loc); | |
718 | } | |
719 | ||
720 | // Accessor | |
721 | const Tocsave_loc | |
722 | tocsave_loc() const | |
723 | { | |
724 | return this->tocsave_loc_; | |
725 | } | |
726 | ||
f43ba157 AM |
727 | void |
728 | do_define_standard_symbols(Symbol_table*, Layout*); | |
729 | ||
42cacb20 DE |
730 | // Finalize the sections. |
731 | void | |
f59f41f3 | 732 | do_finalize_sections(Layout*, const Input_objects*, Symbol_table*); |
42cacb20 DE |
733 | |
734 | // Return the value to use for a dynamic which requires special | |
735 | // treatment. | |
736 | uint64_t | |
737 | do_dynsym_value(const Symbol*) const; | |
738 | ||
c9824451 AM |
739 | // Return the PLT address to use for a local symbol. |
740 | uint64_t | |
741 | do_plt_address_for_local(const Relobj*, unsigned int) const; | |
742 | ||
743 | // Return the PLT address to use for a global symbol. | |
744 | uint64_t | |
745 | do_plt_address_for_global(const Symbol*) const; | |
746 | ||
bd73a62d AM |
747 | // Return the offset to use for the GOT_INDX'th got entry which is |
748 | // for a local tls symbol specified by OBJECT, SYMNDX. | |
749 | int64_t | |
750 | do_tls_offset_for_local(const Relobj* object, | |
751 | unsigned int symndx, | |
752 | unsigned int got_indx) const; | |
753 | ||
754 | // Return the offset to use for the GOT_INDX'th got entry which is | |
755 | // for global tls symbol GSYM. | |
756 | int64_t | |
757 | do_tls_offset_for_global(Symbol* gsym, unsigned int got_indx) const; | |
758 | ||
dc3714f3 AM |
759 | void |
760 | do_function_location(Symbol_location*) const; | |
761 | ||
4d9aa155 AM |
762 | bool |
763 | do_can_check_for_function_pointers() const | |
764 | { return true; } | |
765 | ||
bbec1a5d AM |
766 | // Adjust -fsplit-stack code which calls non-split-stack code. |
767 | void | |
768 | do_calls_non_split(Relobj* object, unsigned int shndx, | |
769 | section_offset_type fnoffset, section_size_type fnsize, | |
6e0813d3 | 770 | const unsigned char* prelocs, size_t reloc_count, |
bbec1a5d AM |
771 | unsigned char* view, section_size_type view_size, |
772 | std::string* from, std::string* to) const; | |
773 | ||
42cacb20 DE |
774 | // Relocate a section. |
775 | void | |
776 | relocate_section(const Relocate_info<size, big_endian>*, | |
777 | unsigned int sh_type, | |
778 | const unsigned char* prelocs, | |
779 | size_t reloc_count, | |
780 | Output_section* output_section, | |
781 | bool needs_special_offset_handling, | |
782 | unsigned char* view, | |
c9269dff | 783 | Address view_address, |
364c7fa5 ILT |
784 | section_size_type view_size, |
785 | const Reloc_symbol_changes*); | |
42cacb20 DE |
786 | |
787 | // Scan the relocs during a relocatable link. | |
788 | void | |
ad0f2072 | 789 | scan_relocatable_relocs(Symbol_table* symtab, |
42cacb20 | 790 | Layout* layout, |
6fa2a40b | 791 | Sized_relobj_file<size, big_endian>* object, |
42cacb20 DE |
792 | unsigned int data_shndx, |
793 | unsigned int sh_type, | |
794 | const unsigned char* prelocs, | |
795 | size_t reloc_count, | |
796 | Output_section* output_section, | |
797 | bool needs_special_offset_handling, | |
798 | size_t local_symbol_count, | |
799 | const unsigned char* plocal_symbols, | |
800 | Relocatable_relocs*); | |
801 | ||
4d625b70 CC |
802 | // Scan the relocs for --emit-relocs. |
803 | void | |
804 | emit_relocs_scan(Symbol_table* symtab, | |
805 | Layout* layout, | |
806 | Sized_relobj_file<size, big_endian>* object, | |
807 | unsigned int data_shndx, | |
808 | unsigned int sh_type, | |
809 | const unsigned char* prelocs, | |
810 | size_t reloc_count, | |
811 | Output_section* output_section, | |
812 | bool needs_special_offset_handling, | |
813 | size_t local_symbol_count, | |
814 | const unsigned char* plocal_syms, | |
815 | Relocatable_relocs* rr); | |
816 | ||
7404fe1b | 817 | // Emit relocations for a section. |
42cacb20 | 818 | void |
7404fe1b AM |
819 | relocate_relocs(const Relocate_info<size, big_endian>*, |
820 | unsigned int sh_type, | |
821 | const unsigned char* prelocs, | |
822 | size_t reloc_count, | |
823 | Output_section* output_section, | |
62fe925a RM |
824 | typename elfcpp::Elf_types<size>::Elf_Off |
825 | offset_in_output_section, | |
7404fe1b AM |
826 | unsigned char*, |
827 | Address view_address, | |
828 | section_size_type, | |
829 | unsigned char* reloc_view, | |
830 | section_size_type reloc_view_size); | |
42cacb20 DE |
831 | |
832 | // Return whether SYM is defined by the ABI. | |
833 | bool | |
9c2d0ef9 | 834 | do_is_defined_by_abi(const Symbol* sym) const |
42cacb20 | 835 | { |
cf43a2fe | 836 | return strcmp(sym->name(), "__tls_get_addr") == 0; |
42cacb20 DE |
837 | } |
838 | ||
839 | // Return the size of the GOT section. | |
840 | section_size_type | |
0e70b911 | 841 | got_size() const |
42cacb20 DE |
842 | { |
843 | gold_assert(this->got_ != NULL); | |
844 | return this->got_->data_size(); | |
845 | } | |
846 | ||
cf43a2fe AM |
847 | // Get the PLT section. |
848 | const Output_data_plt_powerpc<size, big_endian>* | |
849 | plt_section() const | |
850 | { | |
851 | gold_assert(this->plt_ != NULL); | |
852 | return this->plt_; | |
853 | } | |
854 | ||
e5d5f5ed AM |
855 | // Get the IPLT section. |
856 | const Output_data_plt_powerpc<size, big_endian>* | |
857 | iplt_section() const | |
858 | { | |
859 | gold_assert(this->iplt_ != NULL); | |
860 | return this->iplt_; | |
861 | } | |
862 | ||
2d7ad24e AM |
863 | // Get the LPLT section. |
864 | const Output_data_plt_powerpc<size, big_endian>* | |
865 | lplt_section() const | |
866 | { | |
867 | return this->lplt_; | |
868 | } | |
869 | ||
08be3224 AM |
870 | // Return the plt offset and section for the given global sym. |
871 | Address | |
872 | plt_off(const Symbol* gsym, | |
873 | const Output_data_plt_powerpc<size, big_endian>** sec) const | |
874 | { | |
875 | if (gsym->type() == elfcpp::STT_GNU_IFUNC | |
876 | && gsym->can_use_relative_reloc(false)) | |
877 | *sec = this->iplt_section(); | |
878 | else | |
879 | *sec = this->plt_section(); | |
880 | return gsym->plt_offset(); | |
881 | } | |
882 | ||
883 | // Return the plt offset and section for the given local sym. | |
884 | Address | |
885 | plt_off(const Sized_relobj_file<size, big_endian>* relobj, | |
886 | unsigned int local_sym_index, | |
887 | const Output_data_plt_powerpc<size, big_endian>** sec) const | |
888 | { | |
2d7ad24e AM |
889 | const Symbol_value<size>* lsym = relobj->local_symbol(local_sym_index); |
890 | if (lsym->is_ifunc_symbol()) | |
891 | *sec = this->iplt_section(); | |
892 | else | |
893 | *sec = this->lplt_section(); | |
08be3224 AM |
894 | return relobj->local_plt_offset(local_sym_index); |
895 | } | |
896 | ||
cf43a2fe AM |
897 | // Get the .glink section. |
898 | const Output_data_glink<size, big_endian>* | |
899 | glink_section() const | |
900 | { | |
901 | gold_assert(this->glink_ != NULL); | |
902 | return this->glink_; | |
903 | } | |
904 | ||
9055360d AM |
905 | Output_data_glink<size, big_endian>* |
906 | glink_section() | |
907 | { | |
908 | gold_assert(this->glink_ != NULL); | |
909 | return this->glink_; | |
910 | } | |
911 | ||
9d5781f8 AM |
912 | bool has_glink() const |
913 | { return this->glink_ != NULL; } | |
914 | ||
cf43a2fe AM |
915 | // Get the GOT section. |
916 | const Output_data_got_powerpc<size, big_endian>* | |
917 | got_section() const | |
918 | { | |
919 | gold_assert(this->got_ != NULL); | |
920 | return this->got_; | |
921 | } | |
922 | ||
26a4e9cb AM |
923 | // Get the GOT section, creating it if necessary. |
924 | Output_data_got_powerpc<size, big_endian>* | |
925 | got_section(Symbol_table*, Layout*); | |
926 | ||
cf43a2fe AM |
927 | Object* |
928 | do_make_elf_object(const std::string&, Input_file*, off_t, | |
929 | const elfcpp::Ehdr<size, big_endian>&); | |
930 | ||
0e70b911 CC |
931 | // Return the number of entries in the GOT. |
932 | unsigned int | |
933 | got_entry_count() const | |
934 | { | |
935 | if (this->got_ == NULL) | |
936 | return 0; | |
937 | return this->got_size() / (size / 8); | |
938 | } | |
939 | ||
940 | // Return the number of entries in the PLT. | |
941 | unsigned int | |
942 | plt_entry_count() const; | |
943 | ||
944 | // Return the offset of the first non-reserved PLT entry. | |
945 | unsigned int | |
b4f7960d AM |
946 | first_plt_entry_offset() const |
947 | { | |
948 | if (size == 32) | |
949 | return 0; | |
950 | if (this->abiversion() >= 2) | |
951 | return 16; | |
952 | return 24; | |
953 | } | |
0e70b911 CC |
954 | |
955 | // Return the size of each PLT entry. | |
956 | unsigned int | |
b4f7960d AM |
957 | plt_entry_size() const |
958 | { | |
959 | if (size == 32) | |
960 | return 4; | |
961 | if (this->abiversion() >= 2) | |
962 | return 8; | |
963 | return 24; | |
964 | } | |
0e70b911 | 965 | |
d49044c7 AM |
966 | Output_data_save_res<size, big_endian>* |
967 | savres_section() const | |
968 | { | |
969 | return this->savres_section_; | |
970 | } | |
971 | ||
e81fea4d AM |
972 | // Add any special sections for this symbol to the gc work list. |
973 | // For powerpc64, this adds the code section of a function | |
974 | // descriptor. | |
975 | void | |
976 | do_gc_mark_symbol(Symbol_table* symtab, Symbol* sym) const; | |
977 | ||
978 | // Handle target specific gc actions when adding a gc reference from | |
979 | // SRC_OBJ, SRC_SHNDX to a location specified by DST_OBJ, DST_SHNDX | |
980 | // and DST_OFF. For powerpc64, this adds a referenc to the code | |
981 | // section of a function descriptor. | |
982 | void | |
983 | do_gc_add_reference(Symbol_table* symtab, | |
efc6fa12 | 984 | Relobj* src_obj, |
e81fea4d | 985 | unsigned int src_shndx, |
efc6fa12 | 986 | Relobj* dst_obj, |
e81fea4d AM |
987 | unsigned int dst_shndx, |
988 | Address dst_off) const; | |
989 | ||
ec661b9d AM |
990 | typedef std::vector<Stub_table<size, big_endian>*> Stub_tables; |
991 | const Stub_tables& | |
992 | stub_tables() const | |
993 | { return this->stub_tables_; } | |
994 | ||
995 | const Output_data_brlt_powerpc<size, big_endian>* | |
996 | brlt_section() const | |
997 | { return this->brlt_section_; } | |
998 | ||
999 | void | |
1000 | add_branch_lookup_table(Address to) | |
1001 | { | |
1002 | unsigned int off = this->branch_lookup_table_.size() * (size / 8); | |
1003 | this->branch_lookup_table_.insert(std::make_pair(to, off)); | |
1004 | } | |
1005 | ||
1006 | Address | |
1007 | find_branch_lookup_table(Address to) | |
1008 | { | |
1009 | typename Branch_lookup_table::const_iterator p | |
1010 | = this->branch_lookup_table_.find(to); | |
1011 | return p == this->branch_lookup_table_.end() ? invalid_address : p->second; | |
1012 | } | |
1013 | ||
1014 | void | |
1015 | write_branch_lookup_table(unsigned char *oview) | |
1016 | { | |
1017 | for (typename Branch_lookup_table::const_iterator p | |
1018 | = this->branch_lookup_table_.begin(); | |
1019 | p != this->branch_lookup_table_.end(); | |
1020 | ++p) | |
1021 | { | |
4d5effb9 | 1022 | elfcpp::Swap<size, big_endian>::writeval(oview + p->second, p->first); |
ec661b9d AM |
1023 | } |
1024 | } | |
1025 | ||
590b87ff AM |
1026 | // Wrapper used after relax to define a local symbol in output data, |
1027 | // from the end if value < 0. | |
1028 | void | |
1029 | define_local(Symbol_table* symtab, const char* name, | |
1030 | Output_data* od, Address value, unsigned int symsize) | |
1031 | { | |
1032 | Symbol* sym | |
1033 | = symtab->define_in_output_data(name, NULL, Symbol_table::PREDEFINED, | |
1034 | od, value, symsize, elfcpp::STT_NOTYPE, | |
1035 | elfcpp::STB_LOCAL, elfcpp::STV_HIDDEN, 0, | |
1036 | static_cast<Signed_address>(value) < 0, | |
1037 | false); | |
1038 | // We are creating this symbol late, so need to fix up things | |
1039 | // done early in Layout::finalize. | |
1040 | sym->set_dynsym_index(-1U); | |
1041 | } | |
1042 | ||
9e69ed50 AM |
1043 | bool |
1044 | plt_thread_safe() const | |
1045 | { return this->plt_thread_safe_; } | |
1046 | ||
7ee7ff70 AM |
1047 | bool |
1048 | plt_localentry0() const | |
1049 | { return this->plt_localentry0_; } | |
1050 | ||
1051 | void | |
1052 | set_has_localentry0() | |
1053 | { | |
1054 | this->has_localentry0_ = true; | |
1055 | } | |
1056 | ||
1057 | bool | |
1058 | is_elfv2_localentry0(const Symbol* gsym) const | |
1059 | { | |
1060 | return (size == 64 | |
1061 | && this->abiversion() >= 2 | |
1062 | && this->plt_localentry0() | |
1063 | && gsym->type() == elfcpp::STT_FUNC | |
1064 | && gsym->is_defined() | |
565ed01a AM |
1065 | && gsym->nonvis() >> 3 == 0 |
1066 | && !gsym->non_zero_localentry()); | |
7ee7ff70 AM |
1067 | } |
1068 | ||
1069 | bool | |
1070 | is_elfv2_localentry0(const Sized_relobj_file<size, big_endian>* object, | |
1071 | unsigned int r_sym) const | |
1072 | { | |
1073 | const Powerpc_relobj<size, big_endian>* ppc_object | |
1074 | = static_cast<const Powerpc_relobj<size, big_endian>*>(object); | |
1075 | ||
1076 | if (size == 64 | |
1077 | && this->abiversion() >= 2 | |
1078 | && this->plt_localentry0() | |
1079 | && ppc_object->st_other(r_sym) >> 5 == 0) | |
1080 | { | |
1081 | const Symbol_value<size>* psymval = object->local_symbol(r_sym); | |
1082 | bool is_ordinary; | |
1083 | if (!psymval->is_ifunc_symbol() | |
1084 | && psymval->input_shndx(&is_ordinary) != elfcpp::SHN_UNDEF | |
1085 | && is_ordinary) | |
1086 | return true; | |
1087 | } | |
1088 | return false; | |
1089 | } | |
1090 | ||
565ed01a AM |
1091 | // Remember any symbols seen with non-zero localentry, even those |
1092 | // not providing a definition | |
1093 | bool | |
1094 | resolve(Symbol* to, const elfcpp::Sym<size, big_endian>& sym, Object*, | |
1095 | const char*) | |
1096 | { | |
1097 | if (size == 64) | |
1098 | { | |
1099 | unsigned char st_other = sym.get_st_other(); | |
1100 | if ((st_other & elfcpp::STO_PPC64_LOCAL_MASK) != 0) | |
1101 | to->set_non_zero_localentry(); | |
1102 | } | |
1103 | // We haven't resolved anything, continue normal processing. | |
1104 | return false; | |
1105 | } | |
1106 | ||
b4f7960d | 1107 | int |
aacb3b6d | 1108 | abiversion() const |
b4f7960d AM |
1109 | { return this->processor_specific_flags() & elfcpp::EF_PPC64_ABI; } |
1110 | ||
1111 | void | |
aacb3b6d | 1112 | set_abiversion(int ver) |
b4f7960d AM |
1113 | { |
1114 | elfcpp::Elf_Word flags = this->processor_specific_flags(); | |
1115 | flags &= ~elfcpp::EF_PPC64_ABI; | |
1116 | flags |= ver & elfcpp::EF_PPC64_ABI; | |
1117 | this->set_processor_specific_flags(flags); | |
1118 | } | |
1119 | ||
34e0882b AM |
1120 | Symbol* |
1121 | tls_get_addr_opt() const | |
1122 | { return this->tls_get_addr_opt_; } | |
1123 | ||
1124 | Symbol* | |
1125 | tls_get_addr() const | |
1126 | { return this->tls_get_addr_; } | |
1127 | ||
1128 | // If optimizing __tls_get_addr calls, whether this is the | |
1129 | // "__tls_get_addr" symbol. | |
1130 | bool | |
1131 | is_tls_get_addr_opt(const Symbol* gsym) const | |
1132 | { | |
1133 | return this->tls_get_addr_opt_ && (gsym == this->tls_get_addr_ | |
1134 | || gsym == this->tls_get_addr_opt_); | |
1135 | } | |
1136 | ||
1137 | bool | |
1138 | replace_tls_get_addr(const Symbol* gsym) const | |
1139 | { return this->tls_get_addr_opt_ && gsym == this->tls_get_addr_; } | |
1140 | ||
1141 | void | |
1142 | set_has_tls_get_addr_opt() | |
1143 | { this->has_tls_get_addr_opt_ = true; } | |
1144 | ||
aacb3b6d | 1145 | // Offset to toc save stack slot |
b4f7960d | 1146 | int |
aacb3b6d | 1147 | stk_toc() const |
b4f7960d AM |
1148 | { return this->abiversion() < 2 ? 40 : 24; } |
1149 | ||
34e0882b AM |
1150 | // Offset to linker save stack slot. ELFv2 doesn't have a linker word, |
1151 | // so use the CR save slot. Used only by __tls_get_addr call stub, | |
1152 | // relying on __tls_get_addr not saving CR itself. | |
1153 | int | |
1154 | stk_linker() const | |
1155 | { return this->abiversion() < 2 ? 32 : 8; } | |
1156 | ||
42cacb20 DE |
1157 | private: |
1158 | ||
e3deeb9c AM |
1159 | class Track_tls |
1160 | { | |
1161 | public: | |
1162 | enum Tls_get_addr | |
1163 | { | |
1164 | NOT_EXPECTED = 0, | |
1165 | EXPECTED = 1, | |
1166 | SKIP = 2, | |
1167 | NORMAL = 3 | |
1168 | }; | |
1169 | ||
1170 | Track_tls() | |
aacb3b6d | 1171 | : tls_get_addr_state_(NOT_EXPECTED), |
e3deeb9c AM |
1172 | relinfo_(NULL), relnum_(0), r_offset_(0) |
1173 | { } | |
1174 | ||
1175 | ~Track_tls() | |
1176 | { | |
aacb3b6d | 1177 | if (this->tls_get_addr_state_ != NOT_EXPECTED) |
e3deeb9c AM |
1178 | this->missing(); |
1179 | } | |
1180 | ||
1181 | void | |
1182 | missing(void) | |
1183 | { | |
1184 | if (this->relinfo_ != NULL) | |
1185 | gold_error_at_location(this->relinfo_, this->relnum_, this->r_offset_, | |
1186 | _("missing expected __tls_get_addr call")); | |
1187 | } | |
1188 | ||
1189 | void | |
1190 | expect_tls_get_addr_call( | |
1191 | const Relocate_info<size, big_endian>* relinfo, | |
1192 | size_t relnum, | |
1193 | Address r_offset) | |
1194 | { | |
aacb3b6d | 1195 | this->tls_get_addr_state_ = EXPECTED; |
e3deeb9c AM |
1196 | this->relinfo_ = relinfo; |
1197 | this->relnum_ = relnum; | |
1198 | this->r_offset_ = r_offset; | |
1199 | } | |
1200 | ||
1201 | void | |
1202 | expect_tls_get_addr_call() | |
aacb3b6d | 1203 | { this->tls_get_addr_state_ = EXPECTED; } |
e3deeb9c AM |
1204 | |
1205 | void | |
1206 | skip_next_tls_get_addr_call() | |
aacb3b6d | 1207 | {this->tls_get_addr_state_ = SKIP; } |
e3deeb9c AM |
1208 | |
1209 | Tls_get_addr | |
34e0882b AM |
1210 | maybe_skip_tls_get_addr_call(Target_powerpc<size, big_endian>* target, |
1211 | unsigned int r_type, const Symbol* gsym) | |
e3deeb9c AM |
1212 | { |
1213 | bool is_tls_call = ((r_type == elfcpp::R_POWERPC_REL24 | |
1214 | || r_type == elfcpp::R_PPC_PLTREL24) | |
1215 | && gsym != NULL | |
34e0882b AM |
1216 | && (gsym == target->tls_get_addr() |
1217 | || gsym == target->tls_get_addr_opt())); | |
aacb3b6d AM |
1218 | Tls_get_addr last_tls = this->tls_get_addr_state_; |
1219 | this->tls_get_addr_state_ = NOT_EXPECTED; | |
e3deeb9c AM |
1220 | if (is_tls_call && last_tls != EXPECTED) |
1221 | return last_tls; | |
1222 | else if (!is_tls_call && last_tls != NOT_EXPECTED) | |
1223 | { | |
1224 | this->missing(); | |
1225 | return EXPECTED; | |
1226 | } | |
1227 | return NORMAL; | |
1228 | } | |
1229 | ||
1230 | private: | |
1231 | // What we're up to regarding calls to __tls_get_addr. | |
1232 | // On powerpc, the branch and link insn making a call to | |
1233 | // __tls_get_addr is marked with a relocation, R_PPC64_TLSGD, | |
1234 | // R_PPC64_TLSLD, R_PPC_TLSGD or R_PPC_TLSLD, in addition to the | |
1235 | // usual R_POWERPC_REL24 or R_PPC_PLTREL25 relocation on a call. | |
1236 | // The marker relocation always comes first, and has the same | |
1237 | // symbol as the reloc on the insn setting up the __tls_get_addr | |
1238 | // argument. This ties the arg setup insn with the call insn, | |
1239 | // allowing ld to safely optimize away the call. We check that | |
1240 | // every call to __tls_get_addr has a marker relocation, and that | |
1241 | // every marker relocation is on a call to __tls_get_addr. | |
aacb3b6d | 1242 | Tls_get_addr tls_get_addr_state_; |
e3deeb9c AM |
1243 | // Info about the last reloc for error message. |
1244 | const Relocate_info<size, big_endian>* relinfo_; | |
1245 | size_t relnum_; | |
1246 | Address r_offset_; | |
1247 | }; | |
1248 | ||
42cacb20 | 1249 | // The class which scans relocations. |
e3deeb9c | 1250 | class Scan : protected Track_tls |
42cacb20 DE |
1251 | { |
1252 | public: | |
bfdfa4cd AM |
1253 | typedef typename elfcpp::Elf_types<size>::Elf_Addr Address; |
1254 | ||
42cacb20 | 1255 | Scan() |
e3deeb9c | 1256 | : Track_tls(), issued_non_pic_error_(false) |
42cacb20 DE |
1257 | { } |
1258 | ||
95a2c8d6 | 1259 | static inline int |
88b8e639 | 1260 | get_reference_flags(unsigned int r_type, const Target_powerpc* target); |
95a2c8d6 | 1261 | |
42cacb20 | 1262 | inline void |
ad0f2072 | 1263 | local(Symbol_table* symtab, Layout* layout, Target_powerpc* target, |
6fa2a40b | 1264 | Sized_relobj_file<size, big_endian>* object, |
42cacb20 DE |
1265 | unsigned int data_shndx, |
1266 | Output_section* output_section, | |
1267 | const elfcpp::Rela<size, big_endian>& reloc, unsigned int r_type, | |
bfdfa4cd AM |
1268 | const elfcpp::Sym<size, big_endian>& lsym, |
1269 | bool is_discarded); | |
42cacb20 DE |
1270 | |
1271 | inline void | |
ad0f2072 | 1272 | global(Symbol_table* symtab, Layout* layout, Target_powerpc* target, |
6fa2a40b | 1273 | Sized_relobj_file<size, big_endian>* object, |
42cacb20 DE |
1274 | unsigned int data_shndx, |
1275 | Output_section* output_section, | |
1276 | const elfcpp::Rela<size, big_endian>& reloc, unsigned int r_type, | |
1277 | Symbol* gsym); | |
1278 | ||
21bb3914 ST |
1279 | inline bool |
1280 | local_reloc_may_be_function_pointer(Symbol_table* , Layout* , | |
1281 | Target_powerpc* , | |
f6971787 | 1282 | Sized_relobj_file<size, big_endian>* relobj, |
21bb3914 | 1283 | unsigned int , |
2e702c99 RM |
1284 | Output_section* , |
1285 | const elfcpp::Rela<size, big_endian>& , | |
4d9aa155 | 1286 | unsigned int r_type, |
2e702c99 | 1287 | const elfcpp::Sym<size, big_endian>&) |
4d9aa155 AM |
1288 | { |
1289 | // PowerPC64 .opd is not folded, so any identical function text | |
1290 | // may be folded and we'll still keep function addresses distinct. | |
1291 | // That means no reloc is of concern here. | |
1292 | if (size == 64) | |
f6971787 AM |
1293 | { |
1294 | Powerpc_relobj<size, big_endian>* ppcobj = static_cast | |
1295 | <Powerpc_relobj<size, big_endian>*>(relobj); | |
1296 | if (ppcobj->abiversion() == 1) | |
1297 | return false; | |
1298 | } | |
1299 | // For 32-bit and ELFv2, conservatively assume anything but calls to | |
4d9aa155 AM |
1300 | // function code might be taking the address of the function. |
1301 | return !is_branch_reloc(r_type); | |
1302 | } | |
21bb3914 ST |
1303 | |
1304 | inline bool | |
1305 | global_reloc_may_be_function_pointer(Symbol_table* , Layout* , | |
1306 | Target_powerpc* , | |
f6971787 | 1307 | Sized_relobj_file<size, big_endian>* relobj, |
2e702c99 RM |
1308 | unsigned int , |
1309 | Output_section* , | |
4d9aa155 AM |
1310 | const elfcpp::Rela<size, big_endian>& , |
1311 | unsigned int r_type, | |
1312 | Symbol*) | |
1313 | { | |
1314 | // As above. | |
1315 | if (size == 64) | |
f6971787 AM |
1316 | { |
1317 | Powerpc_relobj<size, big_endian>* ppcobj = static_cast | |
1318 | <Powerpc_relobj<size, big_endian>*>(relobj); | |
1319 | if (ppcobj->abiversion() == 1) | |
1320 | return false; | |
1321 | } | |
4d9aa155 AM |
1322 | return !is_branch_reloc(r_type); |
1323 | } | |
21bb3914 | 1324 | |
b3ccdeb5 | 1325 | static bool |
9055360d AM |
1326 | reloc_needs_plt_for_ifunc(Target_powerpc<size, big_endian>* target, |
1327 | Sized_relobj_file<size, big_endian>* object, | |
b3ccdeb5 AM |
1328 | unsigned int r_type, bool report_err); |
1329 | ||
42cacb20 DE |
1330 | private: |
1331 | static void | |
6fa2a40b | 1332 | unsupported_reloc_local(Sized_relobj_file<size, big_endian>*, |
42cacb20 DE |
1333 | unsigned int r_type); |
1334 | ||
1335 | static void | |
6fa2a40b | 1336 | unsupported_reloc_global(Sized_relobj_file<size, big_endian>*, |
42cacb20 DE |
1337 | unsigned int r_type, Symbol*); |
1338 | ||
1339 | static void | |
1340 | generate_tls_call(Symbol_table* symtab, Layout* layout, | |
1341 | Target_powerpc* target); | |
1342 | ||
1343 | void | |
1344 | check_non_pic(Relobj*, unsigned int r_type); | |
1345 | ||
1346 | // Whether we have issued an error about a non-PIC compilation. | |
1347 | bool issued_non_pic_error_; | |
1348 | }; | |
1349 | ||
1611bc4a AM |
1350 | bool |
1351 | symval_for_branch(const Symbol_table* symtab, | |
6c77229c | 1352 | const Sized_symbol<size>* gsym, |
3ea0a085 | 1353 | Powerpc_relobj<size, big_endian>* object, |
1611bc4a | 1354 | Address *value, unsigned int *dest_shndx); |
3ea0a085 | 1355 | |
42cacb20 | 1356 | // The class which implements relocation. |
e3deeb9c | 1357 | class Relocate : protected Track_tls |
42cacb20 DE |
1358 | { |
1359 | public: | |
dd93cd0a AM |
1360 | // Use 'at' branch hints when true, 'y' when false. |
1361 | // FIXME maybe: set this with an option. | |
1362 | static const bool is_isa_v2 = true; | |
1363 | ||
dd93cd0a | 1364 | Relocate() |
e3deeb9c | 1365 | : Track_tls() |
dd93cd0a AM |
1366 | { } |
1367 | ||
42cacb20 DE |
1368 | // Do a relocation. Return false if the caller should not issue |
1369 | // any warnings about this relocation. | |
1370 | inline bool | |
91a65d2f AM |
1371 | relocate(const Relocate_info<size, big_endian>*, unsigned int, |
1372 | Target_powerpc*, Output_section*, size_t, const unsigned char*, | |
1373 | const Sized_symbol<size>*, const Symbol_value<size>*, | |
1374 | unsigned char*, typename elfcpp::Elf_types<size>::Elf_Addr, | |
42cacb20 | 1375 | section_size_type); |
42cacb20 DE |
1376 | }; |
1377 | ||
168a4726 AM |
1378 | class Relocate_comdat_behavior |
1379 | { | |
1380 | public: | |
1381 | // Decide what the linker should do for relocations that refer to | |
1382 | // discarded comdat sections. | |
1383 | inline Comdat_behavior | |
1384 | get(const char* name) | |
1385 | { | |
1386 | gold::Default_comdat_behavior default_behavior; | |
1387 | Comdat_behavior ret = default_behavior.get(name); | |
43193fe9 | 1388 | if (ret == CB_ERROR) |
168a4726 AM |
1389 | { |
1390 | if (size == 32 | |
1391 | && (strcmp(name, ".fixup") == 0 | |
1392 | || strcmp(name, ".got2") == 0)) | |
1393 | ret = CB_IGNORE; | |
1394 | if (size == 64 | |
1395 | && (strcmp(name, ".opd") == 0 | |
1396 | || strcmp(name, ".toc") == 0 | |
1397 | || strcmp(name, ".toc1") == 0)) | |
1398 | ret = CB_IGNORE; | |
1399 | } | |
1400 | return ret; | |
1401 | } | |
1402 | }; | |
1403 | ||
dd93cd0a AM |
1404 | // Optimize the TLS relocation type based on what we know about the |
1405 | // symbol. IS_FINAL is true if the final address of this symbol is | |
1406 | // known at link time. | |
1407 | ||
1408 | tls::Tls_optimization | |
1409 | optimize_tls_gd(bool is_final) | |
1410 | { | |
1411 | // If we are generating a shared library, then we can't do anything | |
1412 | // in the linker. | |
aacb3b6d AM |
1413 | if (parameters->options().shared() |
1414 | || !parameters->options().tls_optimize()) | |
dd93cd0a AM |
1415 | return tls::TLSOPT_NONE; |
1416 | ||
1417 | if (!is_final) | |
1418 | return tls::TLSOPT_TO_IE; | |
1419 | return tls::TLSOPT_TO_LE; | |
1420 | } | |
1421 | ||
1422 | tls::Tls_optimization | |
1423 | optimize_tls_ld() | |
1424 | { | |
aacb3b6d AM |
1425 | if (parameters->options().shared() |
1426 | || !parameters->options().tls_optimize()) | |
dd93cd0a AM |
1427 | return tls::TLSOPT_NONE; |
1428 | ||
1429 | return tls::TLSOPT_TO_LE; | |
1430 | } | |
1431 | ||
1432 | tls::Tls_optimization | |
1433 | optimize_tls_ie(bool is_final) | |
1434 | { | |
aacb3b6d AM |
1435 | if (!is_final |
1436 | || parameters->options().shared() | |
1437 | || !parameters->options().tls_optimize()) | |
dd93cd0a AM |
1438 | return tls::TLSOPT_NONE; |
1439 | ||
1440 | return tls::TLSOPT_TO_LE; | |
1441 | } | |
cf43a2fe | 1442 | |
cf43a2fe AM |
1443 | // Create glink. |
1444 | void | |
1445 | make_glink_section(Layout*); | |
42cacb20 | 1446 | |
cf43a2fe AM |
1447 | // Create the PLT section. |
1448 | void | |
40b469d7 | 1449 | make_plt_section(Symbol_table*, Layout*); |
42cacb20 | 1450 | |
e5d5f5ed | 1451 | void |
40b469d7 | 1452 | make_iplt_section(Symbol_table*, Layout*); |
e5d5f5ed | 1453 | |
2d7ad24e AM |
1454 | void |
1455 | make_lplt_section(Layout*); | |
1456 | ||
ec661b9d AM |
1457 | void |
1458 | make_brlt_section(Layout*); | |
1459 | ||
42cacb20 DE |
1460 | // Create a PLT entry for a global symbol. |
1461 | void | |
ec661b9d | 1462 | make_plt_entry(Symbol_table*, Layout*, Symbol*); |
e5d5f5ed AM |
1463 | |
1464 | // Create a PLT entry for a local IFUNC symbol. | |
1465 | void | |
40b469d7 | 1466 | make_local_ifunc_plt_entry(Symbol_table*, Layout*, |
ec661b9d AM |
1467 | Sized_relobj_file<size, big_endian>*, |
1468 | unsigned int); | |
1469 | ||
2d7ad24e AM |
1470 | // Create a PLT entry for a local non-IFUNC symbol. |
1471 | void | |
1472 | make_local_plt_entry(Layout*, | |
1473 | Sized_relobj_file<size, big_endian>*, | |
1474 | unsigned int); | |
1475 | ||
42cacb20 | 1476 | |
dd93cd0a AM |
1477 | // Create a GOT entry for local dynamic __tls_get_addr. |
1478 | unsigned int | |
1479 | tlsld_got_offset(Symbol_table* symtab, Layout* layout, | |
1480 | Sized_relobj_file<size, big_endian>* object); | |
1481 | ||
42cacb20 | 1482 | unsigned int |
dd93cd0a AM |
1483 | tlsld_got_offset() const |
1484 | { | |
1485 | return this->tlsld_got_offset_; | |
1486 | } | |
42cacb20 | 1487 | |
42cacb20 DE |
1488 | // Get the dynamic reloc section, creating it if necessary. |
1489 | Reloc_section* | |
1490 | rela_dyn_section(Layout*); | |
1491 | ||
b3ccdeb5 AM |
1492 | // Similarly, but for ifunc symbols get the one for ifunc. |
1493 | Reloc_section* | |
1494 | rela_dyn_section(Symbol_table*, Layout*, bool for_ifunc); | |
1495 | ||
42cacb20 DE |
1496 | // Copy a relocation against a global symbol. |
1497 | void | |
ef9beddf | 1498 | copy_reloc(Symbol_table* symtab, Layout* layout, |
2e702c99 | 1499 | Sized_relobj_file<size, big_endian>* object, |
42cacb20 DE |
1500 | unsigned int shndx, Output_section* output_section, |
1501 | Symbol* sym, const elfcpp::Rela<size, big_endian>& reloc) | |
1502 | { | |
859d7987 | 1503 | unsigned int r_type = elfcpp::elf_r_type<size>(reloc.get_r_info()); |
42cacb20 DE |
1504 | this->copy_relocs_.copy_reloc(symtab, layout, |
1505 | symtab->get_sized_symbol<size>(sym), | |
1506 | object, shndx, output_section, | |
859d7987 CC |
1507 | r_type, reloc.get_r_offset(), |
1508 | reloc.get_r_addend(), | |
1509 | this->rela_dyn_section(layout)); | |
42cacb20 DE |
1510 | } |
1511 | ||
0cfdc767 | 1512 | // Look over all the input sections, deciding where to place stubs. |
ec661b9d | 1513 | void |
a3e60ddb | 1514 | group_sections(Layout*, const Task*, bool); |
ec661b9d AM |
1515 | |
1516 | // Sort output sections by address. | |
1517 | struct Sort_sections | |
1518 | { | |
1519 | bool | |
1520 | operator()(const Output_section* sec1, const Output_section* sec2) | |
1521 | { return sec1->address() < sec2->address(); } | |
1522 | }; | |
1523 | ||
1524 | class Branch_info | |
1525 | { | |
1526 | public: | |
1527 | Branch_info(Powerpc_relobj<size, big_endian>* ppc_object, | |
1528 | unsigned int data_shndx, | |
1529 | Address r_offset, | |
1530 | unsigned int r_type, | |
1531 | unsigned int r_sym, | |
1532 | Address addend) | |
1533 | : object_(ppc_object), shndx_(data_shndx), offset_(r_offset), | |
7e57d19e | 1534 | r_type_(r_type), tocsave_ (0), r_sym_(r_sym), addend_(addend) |
ec661b9d AM |
1535 | { } |
1536 | ||
1537 | ~Branch_info() | |
1538 | { } | |
1539 | ||
7e57d19e AM |
1540 | // Return whether this branch is going via a plt call stub, and if |
1541 | // so, mark it as having an R_PPC64_TOCSAVE. | |
1542 | bool | |
1543 | mark_pltcall(Powerpc_relobj<size, big_endian>* ppc_object, | |
1544 | unsigned int shndx, Address offset, | |
1545 | Target_powerpc* target, Symbol_table* symtab); | |
1546 | ||
ec661b9d | 1547 | // If this branch needs a plt call stub, or a long branch stub, make one. |
a3e60ddb | 1548 | bool |
ec661b9d AM |
1549 | make_stub(Stub_table<size, big_endian>*, |
1550 | Stub_table<size, big_endian>*, | |
1551 | Symbol_table*) const; | |
1552 | ||
1553 | private: | |
1554 | // The branch location.. | |
1555 | Powerpc_relobj<size, big_endian>* object_; | |
1556 | unsigned int shndx_; | |
1557 | Address offset_; | |
1558 | // ..and the branch type and destination. | |
7e57d19e AM |
1559 | unsigned int r_type_ : 31; |
1560 | unsigned int tocsave_ : 1; | |
ec661b9d AM |
1561 | unsigned int r_sym_; |
1562 | Address addend_; | |
1563 | }; | |
1564 | ||
42cacb20 DE |
1565 | // Information about this specific target which we pass to the |
1566 | // general Target structure. | |
1567 | static Target::Target_info powerpc_info; | |
1568 | ||
1569 | // The types of GOT entries needed for this platform. | |
0e70b911 CC |
1570 | // These values are exposed to the ABI in an incremental link. |
1571 | // Do not renumber existing values without changing the version | |
1572 | // number of the .gnu_incremental_inputs section. | |
42cacb20 DE |
1573 | enum Got_type |
1574 | { | |
dd93cd0a AM |
1575 | GOT_TYPE_STANDARD, |
1576 | GOT_TYPE_TLSGD, // double entry for @got@tlsgd | |
1577 | GOT_TYPE_DTPREL, // entry for @got@dtprel | |
1578 | GOT_TYPE_TPREL // entry for @got@tprel | |
42cacb20 DE |
1579 | }; |
1580 | ||
ec661b9d | 1581 | // The GOT section. |
cf43a2fe | 1582 | Output_data_got_powerpc<size, big_endian>* got_; |
b3ccdeb5 AM |
1583 | // The PLT section. This is a container for a table of addresses, |
1584 | // and their relocations. Each address in the PLT has a dynamic | |
1585 | // relocation (R_*_JMP_SLOT) and each address will have a | |
1586 | // corresponding entry in .glink for lazy resolution of the PLT. | |
1587 | // ppc32 initialises the PLT to point at the .glink entry, while | |
1588 | // ppc64 leaves this to ld.so. To make a call via the PLT, the | |
1589 | // linker adds a stub that loads the PLT entry into ctr then | |
1590 | // branches to ctr. There may be more than one stub for each PLT | |
1591 | // entry. DT_JMPREL points at the first PLT dynamic relocation and | |
1592 | // DT_PLTRELSZ gives the total size of PLT dynamic relocations. | |
42cacb20 | 1593 | Output_data_plt_powerpc<size, big_endian>* plt_; |
b3ccdeb5 AM |
1594 | // The IPLT section. Like plt_, this is a container for a table of |
1595 | // addresses and their relocations, specifically for STT_GNU_IFUNC | |
1596 | // functions that resolve locally (STT_GNU_IFUNC functions that | |
1597 | // don't resolve locally go in PLT). Unlike plt_, these have no | |
1598 | // entry in .glink for lazy resolution, and the relocation section | |
1599 | // does not have a 1-1 correspondence with IPLT addresses. In fact, | |
1600 | // the relocation section may contain relocations against | |
1601 | // STT_GNU_IFUNC symbols at locations outside of IPLT. The | |
1602 | // relocation section will appear at the end of other dynamic | |
1603 | // relocations, so that ld.so applies these relocations after other | |
1604 | // dynamic relocations. In a static executable, the relocation | |
1605 | // section is emitted and marked with __rela_iplt_start and | |
1606 | // __rela_iplt_end symbols. | |
e5d5f5ed | 1607 | Output_data_plt_powerpc<size, big_endian>* iplt_; |
2d7ad24e AM |
1608 | // A PLT style section for local, non-ifunc symbols |
1609 | Output_data_plt_powerpc<size, big_endian>* lplt_; | |
ec661b9d AM |
1610 | // Section holding long branch destinations. |
1611 | Output_data_brlt_powerpc<size, big_endian>* brlt_section_; | |
1612 | // The .glink section. | |
cf43a2fe | 1613 | Output_data_glink<size, big_endian>* glink_; |
ec661b9d | 1614 | // The dynamic reloc section. |
42cacb20 DE |
1615 | Reloc_section* rela_dyn_; |
1616 | // Relocs saved to avoid a COPY reloc. | |
5edad15d | 1617 | Powerpc_copy_relocs<elfcpp::SHT_RELA, size, big_endian> copy_relocs_; |
dd93cd0a AM |
1618 | // Offset of the GOT entry for local dynamic __tls_get_addr calls. |
1619 | unsigned int tlsld_got_offset_; | |
ec661b9d AM |
1620 | |
1621 | Stub_tables stub_tables_; | |
1622 | typedef Unordered_map<Address, unsigned int> Branch_lookup_table; | |
1623 | Branch_lookup_table branch_lookup_table_; | |
1624 | ||
1625 | typedef std::vector<Branch_info> Branches; | |
1626 | Branches branch_info_; | |
7e57d19e | 1627 | Tocsave_loc tocsave_loc_; |
9e69ed50 AM |
1628 | |
1629 | bool plt_thread_safe_; | |
7ee7ff70 AM |
1630 | bool plt_localentry0_; |
1631 | bool plt_localentry0_init_; | |
1632 | bool has_localentry0_; | |
34e0882b | 1633 | bool has_tls_get_addr_opt_; |
a3e60ddb AM |
1634 | |
1635 | bool relax_failed_; | |
1636 | int relax_fail_count_; | |
1637 | int32_t stub_group_size_; | |
d49044c7 AM |
1638 | |
1639 | Output_data_save_res<size, big_endian> *savres_section_; | |
34e0882b AM |
1640 | |
1641 | // The "__tls_get_addr" symbol, if present | |
1642 | Symbol* tls_get_addr_; | |
1643 | // If optimizing __tls_get_addr calls, the "__tls_get_addr_opt" symbol. | |
1644 | Symbol* tls_get_addr_opt_; | |
42cacb20 DE |
1645 | }; |
1646 | ||
1647 | template<> | |
1648 | Target::Target_info Target_powerpc<32, true>::powerpc_info = | |
1649 | { | |
1650 | 32, // size | |
1651 | true, // is_big_endian | |
1652 | elfcpp::EM_PPC, // machine_code | |
1653 | false, // has_make_symbol | |
1654 | false, // has_resolve | |
1655 | false, // has_code_fill | |
1656 | true, // is_default_stack_executable | |
b3ce541e | 1657 | false, // can_icf_inline_merge_sections |
42cacb20 DE |
1658 | '\0', // wrap_char |
1659 | "/usr/lib/ld.so.1", // dynamic_linker | |
1660 | 0x10000000, // default_text_segment_address | |
1661 | 64 * 1024, // abi_pagesize (overridable by -z max-page-size) | |
8a5e3e08 | 1662 | 4 * 1024, // common_pagesize (overridable by -z common-page-size) |
c9269dff AM |
1663 | false, // isolate_execinstr |
1664 | 0, // rosegment_gap | |
8a5e3e08 ILT |
1665 | elfcpp::SHN_UNDEF, // small_common_shndx |
1666 | elfcpp::SHN_UNDEF, // large_common_shndx | |
1667 | 0, // small_common_section_flags | |
05a352e6 DK |
1668 | 0, // large_common_section_flags |
1669 | NULL, // attributes_section | |
a67858e0 | 1670 | NULL, // attributes_vendor |
8d9743bd MK |
1671 | "_start", // entry_symbol_name |
1672 | 32, // hash_entry_size | |
bce5a025 | 1673 | elfcpp::SHT_PROGBITS, // unwind_section_type |
42cacb20 DE |
1674 | }; |
1675 | ||
1676 | template<> | |
1677 | Target::Target_info Target_powerpc<32, false>::powerpc_info = | |
1678 | { | |
1679 | 32, // size | |
1680 | false, // is_big_endian | |
1681 | elfcpp::EM_PPC, // machine_code | |
1682 | false, // has_make_symbol | |
1683 | false, // has_resolve | |
1684 | false, // has_code_fill | |
1685 | true, // is_default_stack_executable | |
b3ce541e | 1686 | false, // can_icf_inline_merge_sections |
42cacb20 DE |
1687 | '\0', // wrap_char |
1688 | "/usr/lib/ld.so.1", // dynamic_linker | |
1689 | 0x10000000, // default_text_segment_address | |
1690 | 64 * 1024, // abi_pagesize (overridable by -z max-page-size) | |
8a5e3e08 | 1691 | 4 * 1024, // common_pagesize (overridable by -z common-page-size) |
c9269dff AM |
1692 | false, // isolate_execinstr |
1693 | 0, // rosegment_gap | |
8a5e3e08 ILT |
1694 | elfcpp::SHN_UNDEF, // small_common_shndx |
1695 | elfcpp::SHN_UNDEF, // large_common_shndx | |
1696 | 0, // small_common_section_flags | |
05a352e6 DK |
1697 | 0, // large_common_section_flags |
1698 | NULL, // attributes_section | |
a67858e0 | 1699 | NULL, // attributes_vendor |
8d9743bd MK |
1700 | "_start", // entry_symbol_name |
1701 | 32, // hash_entry_size | |
bce5a025 | 1702 | elfcpp::SHT_PROGBITS, // unwind_section_type |
42cacb20 DE |
1703 | }; |
1704 | ||
1705 | template<> | |
1706 | Target::Target_info Target_powerpc<64, true>::powerpc_info = | |
1707 | { | |
1708 | 64, // size | |
1709 | true, // is_big_endian | |
1710 | elfcpp::EM_PPC64, // machine_code | |
1711 | false, // has_make_symbol | |
565ed01a | 1712 | true, // has_resolve |
42cacb20 | 1713 | false, // has_code_fill |
ec769010 | 1714 | false, // is_default_stack_executable |
b3ce541e | 1715 | false, // can_icf_inline_merge_sections |
42cacb20 DE |
1716 | '\0', // wrap_char |
1717 | "/usr/lib/ld.so.1", // dynamic_linker | |
1718 | 0x10000000, // default_text_segment_address | |
1719 | 64 * 1024, // abi_pagesize (overridable by -z max-page-size) | |
dd93cd0a | 1720 | 4 * 1024, // common_pagesize (overridable by -z common-page-size) |
c9269dff AM |
1721 | false, // isolate_execinstr |
1722 | 0, // rosegment_gap | |
8a5e3e08 ILT |
1723 | elfcpp::SHN_UNDEF, // small_common_shndx |
1724 | elfcpp::SHN_UNDEF, // large_common_shndx | |
1725 | 0, // small_common_section_flags | |
05a352e6 DK |
1726 | 0, // large_common_section_flags |
1727 | NULL, // attributes_section | |
a67858e0 | 1728 | NULL, // attributes_vendor |
8d9743bd MK |
1729 | "_start", // entry_symbol_name |
1730 | 32, // hash_entry_size | |
bce5a025 | 1731 | elfcpp::SHT_PROGBITS, // unwind_section_type |
42cacb20 DE |
1732 | }; |
1733 | ||
1734 | template<> | |
1735 | Target::Target_info Target_powerpc<64, false>::powerpc_info = | |
1736 | { | |
1737 | 64, // size | |
1738 | false, // is_big_endian | |
1739 | elfcpp::EM_PPC64, // machine_code | |
1740 | false, // has_make_symbol | |
565ed01a | 1741 | true, // has_resolve |
42cacb20 | 1742 | false, // has_code_fill |
ec769010 | 1743 | false, // is_default_stack_executable |
b3ce541e | 1744 | false, // can_icf_inline_merge_sections |
42cacb20 DE |
1745 | '\0', // wrap_char |
1746 | "/usr/lib/ld.so.1", // dynamic_linker | |
1747 | 0x10000000, // default_text_segment_address | |
1748 | 64 * 1024, // abi_pagesize (overridable by -z max-page-size) | |
dd93cd0a | 1749 | 4 * 1024, // common_pagesize (overridable by -z common-page-size) |
c9269dff AM |
1750 | false, // isolate_execinstr |
1751 | 0, // rosegment_gap | |
8a5e3e08 ILT |
1752 | elfcpp::SHN_UNDEF, // small_common_shndx |
1753 | elfcpp::SHN_UNDEF, // large_common_shndx | |
1754 | 0, // small_common_section_flags | |
05a352e6 DK |
1755 | 0, // large_common_section_flags |
1756 | NULL, // attributes_section | |
a67858e0 | 1757 | NULL, // attributes_vendor |
8d9743bd MK |
1758 | "_start", // entry_symbol_name |
1759 | 32, // hash_entry_size | |
bce5a025 | 1760 | elfcpp::SHT_PROGBITS, // unwind_section_type |
42cacb20 DE |
1761 | }; |
1762 | ||
dd93cd0a AM |
1763 | inline bool |
1764 | is_branch_reloc(unsigned int r_type) | |
1765 | { | |
1766 | return (r_type == elfcpp::R_POWERPC_REL24 | |
1767 | || r_type == elfcpp::R_PPC_PLTREL24 | |
1768 | || r_type == elfcpp::R_PPC_LOCAL24PC | |
1769 | || r_type == elfcpp::R_POWERPC_REL14 | |
1770 | || r_type == elfcpp::R_POWERPC_REL14_BRTAKEN | |
1771 | || r_type == elfcpp::R_POWERPC_REL14_BRNTAKEN | |
1772 | || r_type == elfcpp::R_POWERPC_ADDR24 | |
1773 | || r_type == elfcpp::R_POWERPC_ADDR14 | |
1774 | || r_type == elfcpp::R_POWERPC_ADDR14_BRTAKEN | |
1775 | || r_type == elfcpp::R_POWERPC_ADDR14_BRNTAKEN); | |
1776 | } | |
1777 | ||
08be3224 AM |
1778 | // Reloc resolves to plt entry. |
1779 | template<int size> | |
1780 | inline bool | |
1781 | is_plt16_reloc(unsigned int r_type) | |
1782 | { | |
1783 | return (r_type == elfcpp::R_POWERPC_PLT16_LO | |
1784 | || r_type == elfcpp::R_POWERPC_PLT16_HI | |
1785 | || r_type == elfcpp::R_POWERPC_PLT16_HA | |
1786 | || (size == 64 && r_type == elfcpp::R_PPC64_PLT16_LO_DS)); | |
1787 | } | |
1788 | ||
dd93cd0a AM |
1789 | // If INSN is an opcode that may be used with an @tls operand, return |
1790 | // the transformed insn for TLS optimisation, otherwise return 0. If | |
1791 | // REG is non-zero only match an insn with RB or RA equal to REG. | |
1792 | uint32_t | |
1793 | at_tls_transform(uint32_t insn, unsigned int reg) | |
1794 | { | |
1795 | if ((insn & (0x3f << 26)) != 31 << 26) | |
1796 | return 0; | |
1797 | ||
1798 | unsigned int rtra; | |
1799 | if (reg == 0 || ((insn >> 11) & 0x1f) == reg) | |
1800 | rtra = insn & ((1 << 26) - (1 << 16)); | |
1801 | else if (((insn >> 16) & 0x1f) == reg) | |
1802 | rtra = (insn & (0x1f << 21)) | ((insn & (0x1f << 11)) << 5); | |
1803 | else | |
1804 | return 0; | |
1805 | ||
1806 | if ((insn & (0x3ff << 1)) == 266 << 1) | |
1807 | // add -> addi | |
1808 | insn = 14 << 26; | |
1809 | else if ((insn & (0x1f << 1)) == 23 << 1 | |
1810 | && ((insn & (0x1f << 6)) < 14 << 6 | |
1811 | || ((insn & (0x1f << 6)) >= 16 << 6 | |
1812 | && (insn & (0x1f << 6)) < 24 << 6))) | |
1813 | // load and store indexed -> dform | |
1814 | insn = (32 | ((insn >> 6) & 0x1f)) << 26; | |
1815 | else if ((insn & (((0x1a << 5) | 0x1f) << 1)) == 21 << 1) | |
1816 | // ldx, ldux, stdx, stdux -> ld, ldu, std, stdu | |
1817 | insn = ((58 | ((insn >> 6) & 4)) << 26) | ((insn >> 6) & 1); | |
1818 | else if ((insn & (((0x1f << 5) | 0x1f) << 1)) == 341 << 1) | |
1819 | // lwax -> lwa | |
1820 | insn = (58 << 26) | 2; | |
1821 | else | |
1822 | return 0; | |
1823 | insn |= rtra; | |
1824 | return insn; | |
1825 | } | |
1826 | ||
dd93cd0a | 1827 | |
42cacb20 DE |
1828 | template<int size, bool big_endian> |
1829 | class Powerpc_relocate_functions | |
1830 | { | |
dd93cd0a | 1831 | public: |
f4baf0d4 | 1832 | enum Overflow_check |
dd93cd0a | 1833 | { |
f4baf0d4 AM |
1834 | CHECK_NONE, |
1835 | CHECK_SIGNED, | |
b80eed39 AM |
1836 | CHECK_UNSIGNED, |
1837 | CHECK_BITFIELD, | |
1838 | CHECK_LOW_INSN, | |
1839 | CHECK_HIGH_INSN | |
dd93cd0a AM |
1840 | }; |
1841 | ||
f4baf0d4 | 1842 | enum Status |
dd93cd0a | 1843 | { |
f4baf0d4 AM |
1844 | STATUS_OK, |
1845 | STATUS_OVERFLOW | |
1846 | }; | |
dd93cd0a | 1847 | |
42cacb20 | 1848 | private: |
c9269dff | 1849 | typedef Powerpc_relocate_functions<size, big_endian> This; |
c9269dff | 1850 | typedef typename elfcpp::Elf_types<size>::Elf_Addr Address; |
a680de9a | 1851 | typedef typename elfcpp::Elf_types<size>::Elf_Swxword SignedAddress; |
c9269dff | 1852 | |
dd93cd0a AM |
1853 | template<int valsize> |
1854 | static inline bool | |
1855 | has_overflow_signed(Address value) | |
1856 | { | |
1857 | // limit = 1 << (valsize - 1) without shift count exceeding size of type | |
1858 | Address limit = static_cast<Address>(1) << ((valsize - 1) >> 1); | |
1859 | limit <<= ((valsize - 1) >> 1); | |
1860 | limit <<= ((valsize - 1) - 2 * ((valsize - 1) >> 1)); | |
1861 | return value + limit > (limit << 1) - 1; | |
1862 | } | |
1863 | ||
1864 | template<int valsize> | |
1865 | static inline bool | |
b80eed39 | 1866 | has_overflow_unsigned(Address value) |
dd93cd0a AM |
1867 | { |
1868 | Address limit = static_cast<Address>(1) << ((valsize - 1) >> 1); | |
1869 | limit <<= ((valsize - 1) >> 1); | |
1870 | limit <<= ((valsize - 1) - 2 * ((valsize - 1) >> 1)); | |
b80eed39 AM |
1871 | return value > (limit << 1) - 1; |
1872 | } | |
1873 | ||
1874 | template<int valsize> | |
1875 | static inline bool | |
1876 | has_overflow_bitfield(Address value) | |
1877 | { | |
1878 | return (has_overflow_unsigned<valsize>(value) | |
1879 | && has_overflow_signed<valsize>(value)); | |
dd93cd0a AM |
1880 | } |
1881 | ||
1882 | template<int valsize> | |
f4baf0d4 AM |
1883 | static inline Status |
1884 | overflowed(Address value, Overflow_check overflow) | |
dd93cd0a | 1885 | { |
f4baf0d4 | 1886 | if (overflow == CHECK_SIGNED) |
dd93cd0a AM |
1887 | { |
1888 | if (has_overflow_signed<valsize>(value)) | |
f4baf0d4 | 1889 | return STATUS_OVERFLOW; |
dd93cd0a | 1890 | } |
b80eed39 AM |
1891 | else if (overflow == CHECK_UNSIGNED) |
1892 | { | |
1893 | if (has_overflow_unsigned<valsize>(value)) | |
1894 | return STATUS_OVERFLOW; | |
1895 | } | |
f4baf0d4 | 1896 | else if (overflow == CHECK_BITFIELD) |
dd93cd0a AM |
1897 | { |
1898 | if (has_overflow_bitfield<valsize>(value)) | |
f4baf0d4 | 1899 | return STATUS_OVERFLOW; |
dd93cd0a | 1900 | } |
f4baf0d4 | 1901 | return STATUS_OK; |
dd93cd0a AM |
1902 | } |
1903 | ||
cf43a2fe | 1904 | // Do a simple RELA relocation |
0cfb0717 | 1905 | template<int fieldsize, int valsize> |
f4baf0d4 AM |
1906 | static inline Status |
1907 | rela(unsigned char* view, Address value, Overflow_check overflow) | |
dd93cd0a | 1908 | { |
0cfb0717 | 1909 | typedef typename elfcpp::Swap<fieldsize, big_endian>::Valtype Valtype; |
dd93cd0a | 1910 | Valtype* wv = reinterpret_cast<Valtype*>(view); |
0cfb0717 | 1911 | elfcpp::Swap<fieldsize, big_endian>::writeval(wv, value); |
dd93cd0a AM |
1912 | return overflowed<valsize>(value, overflow); |
1913 | } | |
1914 | ||
0cfb0717 | 1915 | template<int fieldsize, int valsize> |
f4baf0d4 | 1916 | static inline Status |
42cacb20 DE |
1917 | rela(unsigned char* view, |
1918 | unsigned int right_shift, | |
0cfb0717 | 1919 | typename elfcpp::Valtype_base<fieldsize>::Valtype dst_mask, |
c9269dff | 1920 | Address value, |
f4baf0d4 | 1921 | Overflow_check overflow) |
42cacb20 | 1922 | { |
0cfb0717 | 1923 | typedef typename elfcpp::Swap<fieldsize, big_endian>::Valtype Valtype; |
42cacb20 | 1924 | Valtype* wv = reinterpret_cast<Valtype*>(view); |
0cfb0717 | 1925 | Valtype val = elfcpp::Swap<fieldsize, big_endian>::readval(wv); |
dd93cd0a | 1926 | Valtype reloc = value >> right_shift; |
42cacb20 DE |
1927 | val &= ~dst_mask; |
1928 | reloc &= dst_mask; | |
0cfb0717 | 1929 | elfcpp::Swap<fieldsize, big_endian>::writeval(wv, val | reloc); |
dd93cd0a | 1930 | return overflowed<valsize>(value >> right_shift, overflow); |
42cacb20 DE |
1931 | } |
1932 | ||
cf43a2fe | 1933 | // Do a simple RELA relocation, unaligned. |
0cfb0717 | 1934 | template<int fieldsize, int valsize> |
f4baf0d4 AM |
1935 | static inline Status |
1936 | rela_ua(unsigned char* view, Address value, Overflow_check overflow) | |
dd93cd0a | 1937 | { |
0cfb0717 | 1938 | elfcpp::Swap_unaligned<fieldsize, big_endian>::writeval(view, value); |
dd93cd0a AM |
1939 | return overflowed<valsize>(value, overflow); |
1940 | } | |
1941 | ||
0cfb0717 | 1942 | template<int fieldsize, int valsize> |
f4baf0d4 | 1943 | static inline Status |
cf43a2fe AM |
1944 | rela_ua(unsigned char* view, |
1945 | unsigned int right_shift, | |
0cfb0717 | 1946 | typename elfcpp::Valtype_base<fieldsize>::Valtype dst_mask, |
c9269dff | 1947 | Address value, |
f4baf0d4 | 1948 | Overflow_check overflow) |
42cacb20 | 1949 | { |
0cfb0717 | 1950 | typedef typename elfcpp::Swap_unaligned<fieldsize, big_endian>::Valtype |
c9269dff | 1951 | Valtype; |
0cfb0717 | 1952 | Valtype val = elfcpp::Swap<fieldsize, big_endian>::readval(view); |
dd93cd0a | 1953 | Valtype reloc = value >> right_shift; |
42cacb20 DE |
1954 | val &= ~dst_mask; |
1955 | reloc &= dst_mask; | |
0cfb0717 | 1956 | elfcpp::Swap_unaligned<fieldsize, big_endian>::writeval(view, val | reloc); |
dd93cd0a | 1957 | return overflowed<valsize>(value >> right_shift, overflow); |
42cacb20 DE |
1958 | } |
1959 | ||
42cacb20 | 1960 | public: |
dd93cd0a | 1961 | // R_PPC64_ADDR64: (Symbol + Addend) |
42cacb20 | 1962 | static inline void |
dd93cd0a | 1963 | addr64(unsigned char* view, Address value) |
0cfb0717 | 1964 | { This::template rela<64,64>(view, value, CHECK_NONE); } |
42cacb20 | 1965 | |
dd93cd0a | 1966 | // R_PPC64_UADDR64: (Symbol + Addend) unaligned |
42cacb20 | 1967 | static inline void |
dd93cd0a | 1968 | addr64_u(unsigned char* view, Address value) |
0cfb0717 | 1969 | { This::template rela_ua<64,64>(view, value, CHECK_NONE); } |
dd93cd0a AM |
1970 | |
1971 | // R_POWERPC_ADDR32: (Symbol + Addend) | |
f4baf0d4 AM |
1972 | static inline Status |
1973 | addr32(unsigned char* view, Address value, Overflow_check overflow) | |
0cfb0717 | 1974 | { return This::template rela<32,32>(view, value, overflow); } |
dd93cd0a AM |
1975 | |
1976 | // R_POWERPC_UADDR32: (Symbol + Addend) unaligned | |
f4baf0d4 AM |
1977 | static inline Status |
1978 | addr32_u(unsigned char* view, Address value, Overflow_check overflow) | |
0cfb0717 | 1979 | { return This::template rela_ua<32,32>(view, value, overflow); } |
dd93cd0a AM |
1980 | |
1981 | // R_POWERPC_ADDR24: (Symbol + Addend) & 0x3fffffc | |
f4baf0d4 AM |
1982 | static inline Status |
1983 | addr24(unsigned char* view, Address value, Overflow_check overflow) | |
dd93cd0a | 1984 | { |
0cfb0717 AM |
1985 | Status stat = This::template rela<32,26>(view, 0, 0x03fffffc, |
1986 | value, overflow); | |
f4baf0d4 AM |
1987 | if (overflow != CHECK_NONE && (value & 3) != 0) |
1988 | stat = STATUS_OVERFLOW; | |
dd93cd0a AM |
1989 | return stat; |
1990 | } | |
42cacb20 DE |
1991 | |
1992 | // R_POWERPC_ADDR16: (Symbol + Addend) & 0xffff | |
f4baf0d4 AM |
1993 | static inline Status |
1994 | addr16(unsigned char* view, Address value, Overflow_check overflow) | |
0cfb0717 | 1995 | { return This::template rela<16,16>(view, value, overflow); } |
42cacb20 | 1996 | |
dd93cd0a | 1997 | // R_POWERPC_ADDR16: (Symbol + Addend) & 0xffff, unaligned |
f4baf0d4 AM |
1998 | static inline Status |
1999 | addr16_u(unsigned char* view, Address value, Overflow_check overflow) | |
0cfb0717 | 2000 | { return This::template rela_ua<16,16>(view, value, overflow); } |
42cacb20 | 2001 | |
dd93cd0a | 2002 | // R_POWERPC_ADDR16_DS: (Symbol + Addend) & 0xfffc |
f4baf0d4 AM |
2003 | static inline Status |
2004 | addr16_ds(unsigned char* view, Address value, Overflow_check overflow) | |
dd93cd0a | 2005 | { |
0cfb0717 | 2006 | Status stat = This::template rela<16,16>(view, 0, 0xfffc, value, overflow); |
ec86f434 | 2007 | if ((value & 3) != 0) |
f4baf0d4 | 2008 | stat = STATUS_OVERFLOW; |
dd93cd0a AM |
2009 | return stat; |
2010 | } | |
42cacb20 | 2011 | |
a680de9a PB |
2012 | // R_POWERPC_ADDR16_DQ: (Symbol + Addend) & 0xfff0 |
2013 | static inline Status | |
2014 | addr16_dq(unsigned char* view, Address value, Overflow_check overflow) | |
2015 | { | |
2016 | Status stat = This::template rela<16,16>(view, 0, 0xfff0, value, overflow); | |
2017 | if ((value & 15) != 0) | |
2018 | stat = STATUS_OVERFLOW; | |
2019 | return stat; | |
2020 | } | |
2021 | ||
42cacb20 DE |
2022 | // R_POWERPC_ADDR16_HI: ((Symbol + Addend) >> 16) & 0xffff |
2023 | static inline void | |
dd93cd0a | 2024 | addr16_hi(unsigned char* view, Address value) |
0cfb0717 | 2025 | { This::template rela<16,16>(view, 16, 0xffff, value, CHECK_NONE); } |
42cacb20 | 2026 | |
c9269dff | 2027 | // R_POWERPC_ADDR16_HA: ((Symbol + Addend + 0x8000) >> 16) & 0xffff |
42cacb20 | 2028 | static inline void |
dd93cd0a AM |
2029 | addr16_ha(unsigned char* view, Address value) |
2030 | { This::addr16_hi(view, value + 0x8000); } | |
42cacb20 | 2031 | |
dd93cd0a | 2032 | // R_POWERPC_ADDR16_HIGHER: ((Symbol + Addend) >> 32) & 0xffff |
42cacb20 | 2033 | static inline void |
dd93cd0a | 2034 | addr16_hi2(unsigned char* view, Address value) |
0cfb0717 | 2035 | { This::template rela<16,16>(view, 32, 0xffff, value, CHECK_NONE); } |
42cacb20 | 2036 | |
dd93cd0a | 2037 | // R_POWERPC_ADDR16_HIGHERA: ((Symbol + Addend + 0x8000) >> 32) & 0xffff |
42cacb20 | 2038 | static inline void |
dd93cd0a AM |
2039 | addr16_ha2(unsigned char* view, Address value) |
2040 | { This::addr16_hi2(view, value + 0x8000); } | |
42cacb20 | 2041 | |
dd93cd0a | 2042 | // R_POWERPC_ADDR16_HIGHEST: ((Symbol + Addend) >> 48) & 0xffff |
42cacb20 | 2043 | static inline void |
dd93cd0a | 2044 | addr16_hi3(unsigned char* view, Address value) |
0cfb0717 | 2045 | { This::template rela<16,16>(view, 48, 0xffff, value, CHECK_NONE); } |
42cacb20 | 2046 | |
dd93cd0a | 2047 | // R_POWERPC_ADDR16_HIGHESTA: ((Symbol + Addend + 0x8000) >> 48) & 0xffff |
42cacb20 | 2048 | static inline void |
dd93cd0a AM |
2049 | addr16_ha3(unsigned char* view, Address value) |
2050 | { This::addr16_hi3(view, value + 0x8000); } | |
2051 | ||
2052 | // R_POWERPC_ADDR14: (Symbol + Addend) & 0xfffc | |
f4baf0d4 AM |
2053 | static inline Status |
2054 | addr14(unsigned char* view, Address value, Overflow_check overflow) | |
dd93cd0a | 2055 | { |
0cfb0717 | 2056 | Status stat = This::template rela<32,16>(view, 0, 0xfffc, value, overflow); |
f4baf0d4 AM |
2057 | if (overflow != CHECK_NONE && (value & 3) != 0) |
2058 | stat = STATUS_OVERFLOW; | |
dd93cd0a AM |
2059 | return stat; |
2060 | } | |
a680de9a PB |
2061 | |
2062 | // R_POWERPC_REL16DX_HA | |
2063 | static inline Status | |
2064 | addr16dx_ha(unsigned char *view, Address value, Overflow_check overflow) | |
2065 | { | |
2066 | typedef typename elfcpp::Swap<32, big_endian>::Valtype Valtype; | |
2067 | Valtype* wv = reinterpret_cast<Valtype*>(view); | |
2068 | Valtype val = elfcpp::Swap<32, big_endian>::readval(wv); | |
2069 | value += 0x8000; | |
2070 | value = static_cast<SignedAddress>(value) >> 16; | |
2071 | val |= (value & 0xffc1) | ((value & 0x3e) << 15); | |
2072 | elfcpp::Swap<32, big_endian>::writeval(wv, val); | |
2073 | return overflowed<16>(value, overflow); | |
2074 | } | |
cf43a2fe AM |
2075 | }; |
2076 | ||
b4f7960d AM |
2077 | // Set ABI version for input and output. |
2078 | ||
2079 | template<int size, bool big_endian> | |
2080 | void | |
2081 | Powerpc_relobj<size, big_endian>::set_abiversion(int ver) | |
2082 | { | |
2083 | this->e_flags_ |= ver; | |
2084 | if (this->abiversion() != 0) | |
2085 | { | |
2086 | Target_powerpc<size, big_endian>* target = | |
2087 | static_cast<Target_powerpc<size, big_endian>*>( | |
2088 | parameters->sized_target<size, big_endian>()); | |
2089 | if (target->abiversion() == 0) | |
2090 | target->set_abiversion(this->abiversion()); | |
2091 | else if (target->abiversion() != this->abiversion()) | |
2092 | gold_error(_("%s: ABI version %d is not compatible " | |
2093 | "with ABI version %d output"), | |
2094 | this->name().c_str(), | |
2095 | this->abiversion(), target->abiversion()); | |
2096 | ||
2097 | } | |
2098 | } | |
2099 | ||
5edad15d AM |
2100 | // Stash away the index of .got2, .opd, .rela.toc, and .toc in a |
2101 | // relocatable object, if such sections exists. | |
cf43a2fe AM |
2102 | |
2103 | template<int size, bool big_endian> | |
2104 | bool | |
2105 | Powerpc_relobj<size, big_endian>::do_find_special_sections( | |
2106 | Read_symbols_data* sd) | |
2107 | { | |
c9269dff AM |
2108 | const unsigned char* const pshdrs = sd->section_headers->data(); |
2109 | const unsigned char* namesu = sd->section_names->data(); | |
2110 | const char* names = reinterpret_cast<const char*>(namesu); | |
2111 | section_size_type names_size = sd->section_names_size; | |
2112 | const unsigned char* s; | |
2113 | ||
dc3714f3 AM |
2114 | s = this->template find_shdr<size, big_endian>(pshdrs, |
2115 | size == 32 ? ".got2" : ".opd", | |
2116 | names, names_size, NULL); | |
c9269dff AM |
2117 | if (s != NULL) |
2118 | { | |
2119 | unsigned int ndx = (s - pshdrs) / elfcpp::Elf_sizes<size>::shdr_size; | |
2120 | this->special_ = ndx; | |
b4f7960d AM |
2121 | if (size == 64) |
2122 | { | |
2123 | if (this->abiversion() == 0) | |
2124 | this->set_abiversion(1); | |
2125 | else if (this->abiversion() > 1) | |
2126 | gold_error(_("%s: .opd invalid in abiv%d"), | |
2127 | this->name().c_str(), this->abiversion()); | |
2128 | } | |
c9269dff | 2129 | } |
5edad15d AM |
2130 | if (size == 64) |
2131 | { | |
2132 | s = this->template find_shdr<size, big_endian>(pshdrs, ".rela.toc", | |
2133 | names, names_size, NULL); | |
2134 | if (s != NULL) | |
2135 | { | |
2136 | unsigned int ndx = (s - pshdrs) / elfcpp::Elf_sizes<size>::shdr_size; | |
2137 | this->relatoc_ = ndx; | |
2138 | typename elfcpp::Shdr<size, big_endian> shdr(s); | |
2139 | this->toc_ = this->adjust_shndx(shdr.get_sh_info()); | |
2140 | } | |
2141 | } | |
c9269dff AM |
2142 | return Sized_relobj_file<size, big_endian>::do_find_special_sections(sd); |
2143 | } | |
2144 | ||
2145 | // Examine .rela.opd to build info about function entry points. | |
2146 | ||
2147 | template<int size, bool big_endian> | |
2148 | void | |
2149 | Powerpc_relobj<size, big_endian>::scan_opd_relocs( | |
2150 | size_t reloc_count, | |
2151 | const unsigned char* prelocs, | |
2152 | const unsigned char* plocal_syms) | |
2153 | { | |
2154 | if (size == 64) | |
cf43a2fe | 2155 | { |
0e123f69 AM |
2156 | typedef typename elfcpp::Rela<size, big_endian> Reltype; |
2157 | const int reloc_size = elfcpp::Elf_sizes<size>::rela_size; | |
c9269dff | 2158 | const int sym_size = elfcpp::Elf_sizes<size>::sym_size; |
ec4dbad3 AM |
2159 | Address expected_off = 0; |
2160 | bool regular = true; | |
2161 | unsigned int opd_ent_size = 0; | |
c9269dff AM |
2162 | |
2163 | for (size_t i = 0; i < reloc_count; ++i, prelocs += reloc_size) | |
cf43a2fe | 2164 | { |
c9269dff AM |
2165 | Reltype reloc(prelocs); |
2166 | typename elfcpp::Elf_types<size>::Elf_WXword r_info | |
2167 | = reloc.get_r_info(); | |
2168 | unsigned int r_type = elfcpp::elf_r_type<size>(r_info); | |
2169 | if (r_type == elfcpp::R_PPC64_ADDR64) | |
2170 | { | |
2171 | unsigned int r_sym = elfcpp::elf_r_sym<size>(r_info); | |
2172 | typename elfcpp::Elf_types<size>::Elf_Addr value; | |
2173 | bool is_ordinary; | |
2174 | unsigned int shndx; | |
2175 | if (r_sym < this->local_symbol_count()) | |
2176 | { | |
2177 | typename elfcpp::Sym<size, big_endian> | |
2178 | lsym(plocal_syms + r_sym * sym_size); | |
2179 | shndx = lsym.get_st_shndx(); | |
2180 | shndx = this->adjust_sym_shndx(r_sym, shndx, &is_ordinary); | |
2181 | value = lsym.get_st_value(); | |
2182 | } | |
2183 | else | |
2184 | shndx = this->symbol_section_and_value(r_sym, &value, | |
2185 | &is_ordinary); | |
2186 | this->set_opd_ent(reloc.get_r_offset(), shndx, | |
2187 | value + reloc.get_r_addend()); | |
ec4dbad3 AM |
2188 | if (i == 2) |
2189 | { | |
2190 | expected_off = reloc.get_r_offset(); | |
2191 | opd_ent_size = expected_off; | |
2192 | } | |
2193 | else if (expected_off != reloc.get_r_offset()) | |
2194 | regular = false; | |
2195 | expected_off += opd_ent_size; | |
2196 | } | |
2197 | else if (r_type == elfcpp::R_PPC64_TOC) | |
2198 | { | |
2199 | if (expected_off - opd_ent_size + 8 != reloc.get_r_offset()) | |
2200 | regular = false; | |
2201 | } | |
2202 | else | |
2203 | { | |
2204 | gold_warning(_("%s: unexpected reloc type %u in .opd section"), | |
2205 | this->name().c_str(), r_type); | |
2206 | regular = false; | |
c9269dff AM |
2207 | } |
2208 | } | |
ec4dbad3 AM |
2209 | if (reloc_count <= 2) |
2210 | opd_ent_size = this->section_size(this->opd_shndx()); | |
2211 | if (opd_ent_size != 24 && opd_ent_size != 16) | |
2212 | regular = false; | |
2213 | if (!regular) | |
2214 | { | |
2215 | gold_warning(_("%s: .opd is not a regular array of opd entries"), | |
2216 | this->name().c_str()); | |
2217 | opd_ent_size = 0; | |
2218 | } | |
c9269dff AM |
2219 | } |
2220 | } | |
2221 | ||
5edad15d AM |
2222 | // Returns true if a code sequence loading the TOC entry at VALUE |
2223 | // relative to the TOC pointer can be converted into code calculating | |
2224 | // a TOC pointer relative offset. | |
2225 | // If so, the TOC pointer relative offset is stored to VALUE. | |
2226 | ||
2227 | template<int size, bool big_endian> | |
2228 | bool | |
2229 | Powerpc_relobj<size, big_endian>::make_toc_relative( | |
2230 | Target_powerpc<size, big_endian>* target, | |
2231 | Address* value) | |
2232 | { | |
2233 | if (size != 64) | |
2234 | return false; | |
2235 | ||
e666304e AM |
2236 | // With -mcmodel=medium code it is quite possible to have |
2237 | // toc-relative relocs referring to objects outside the TOC. | |
2238 | // Don't try to look at a non-existent TOC. | |
2239 | if (this->toc_shndx() == 0) | |
2240 | return false; | |
2241 | ||
5edad15d AM |
2242 | // Convert VALUE back to an address by adding got_base (see below), |
2243 | // then to an offset in the TOC by subtracting the TOC output | |
2244 | // section address and the TOC output offset. Since this TOC output | |
2245 | // section and the got output section are one and the same, we can | |
2246 | // omit adding and subtracting the output section address. | |
2247 | Address off = (*value + this->toc_base_offset() | |
2248 | - this->output_section_offset(this->toc_shndx())); | |
2249 | // Is this offset in the TOC? -mcmodel=medium code may be using | |
2250 | // TOC relative access to variables outside the TOC. Those of | |
2251 | // course can't be optimized. We also don't try to optimize code | |
2252 | // that is using a different object's TOC. | |
2253 | if (off >= this->section_size(this->toc_shndx())) | |
2254 | return false; | |
2255 | ||
2256 | if (this->no_toc_opt(off)) | |
2257 | return false; | |
2258 | ||
2259 | section_size_type vlen; | |
2260 | unsigned char* view = this->get_output_view(this->toc_shndx(), &vlen); | |
2261 | Address addr = elfcpp::Swap<size, big_endian>::readval(view + off); | |
2262 | // The TOC pointer | |
2263 | Address got_base = (target->got_section()->output_section()->address() | |
2264 | + this->toc_base_offset()); | |
2265 | addr -= got_base; | |
857e829e | 2266 | if (addr + (uint64_t) 0x80008000 >= (uint64_t) 1 << 32) |
5edad15d AM |
2267 | return false; |
2268 | ||
2269 | *value = addr; | |
2270 | return true; | |
2271 | } | |
2272 | ||
2273 | // Perform the Sized_relobj_file method, then set up opd info from | |
2274 | // .opd relocs. | |
2275 | ||
c9269dff AM |
2276 | template<int size, bool big_endian> |
2277 | void | |
2278 | Powerpc_relobj<size, big_endian>::do_read_relocs(Read_relocs_data* rd) | |
2279 | { | |
2280 | Sized_relobj_file<size, big_endian>::do_read_relocs(rd); | |
2281 | if (size == 64) | |
2282 | { | |
2283 | for (Read_relocs_data::Relocs_list::iterator p = rd->relocs.begin(); | |
2284 | p != rd->relocs.end(); | |
2285 | ++p) | |
2286 | { | |
2287 | if (p->data_shndx == this->opd_shndx()) | |
2288 | { | |
ec4dbad3 AM |
2289 | uint64_t opd_size = this->section_size(this->opd_shndx()); |
2290 | gold_assert(opd_size == static_cast<size_t>(opd_size)); | |
2291 | if (opd_size != 0) | |
2292 | { | |
2293 | this->init_opd(opd_size); | |
2294 | this->scan_opd_relocs(p->reloc_count, p->contents->data(), | |
2295 | rd->local_symbols->data()); | |
2296 | } | |
c9269dff AM |
2297 | break; |
2298 | } | |
cf43a2fe AM |
2299 | } |
2300 | } | |
cf43a2fe AM |
2301 | } |
2302 | ||
b4f7960d AM |
2303 | // Read the symbols then set up st_other vector. |
2304 | ||
2305 | template<int size, bool big_endian> | |
2306 | void | |
2307 | Powerpc_relobj<size, big_endian>::do_read_symbols(Read_symbols_data* sd) | |
2308 | { | |
f35c4853 | 2309 | this->base_read_symbols(sd); |
b4f7960d AM |
2310 | if (size == 64) |
2311 | { | |
2312 | const int shdr_size = elfcpp::Elf_sizes<size>::shdr_size; | |
2313 | const unsigned char* const pshdrs = sd->section_headers->data(); | |
2314 | const unsigned int loccount = this->do_local_symbol_count(); | |
2315 | if (loccount != 0) | |
2316 | { | |
2317 | this->st_other_.resize(loccount); | |
2318 | const int sym_size = elfcpp::Elf_sizes<size>::sym_size; | |
2319 | off_t locsize = loccount * sym_size; | |
2320 | const unsigned int symtab_shndx = this->symtab_shndx(); | |
2321 | const unsigned char *psymtab = pshdrs + symtab_shndx * shdr_size; | |
2322 | typename elfcpp::Shdr<size, big_endian> shdr(psymtab); | |
2323 | const unsigned char* psyms = this->get_view(shdr.get_sh_offset(), | |
2324 | locsize, true, false); | |
2325 | psyms += sym_size; | |
2326 | for (unsigned int i = 1; i < loccount; ++i, psyms += sym_size) | |
2327 | { | |
2328 | elfcpp::Sym<size, big_endian> sym(psyms); | |
2329 | unsigned char st_other = sym.get_st_other(); | |
2330 | this->st_other_[i] = st_other; | |
2331 | if ((st_other & elfcpp::STO_PPC64_LOCAL_MASK) != 0) | |
2332 | { | |
2333 | if (this->abiversion() == 0) | |
2334 | this->set_abiversion(2); | |
2335 | else if (this->abiversion() < 2) | |
2336 | gold_error(_("%s: local symbol %d has invalid st_other" | |
2337 | " for ABI version 1"), | |
2338 | this->name().c_str(), i); | |
2339 | } | |
2340 | } | |
2341 | } | |
2342 | } | |
2343 | } | |
2344 | ||
2345 | template<int size, bool big_endian> | |
2346 | void | |
2347 | Powerpc_dynobj<size, big_endian>::set_abiversion(int ver) | |
2348 | { | |
2349 | this->e_flags_ |= ver; | |
2350 | if (this->abiversion() != 0) | |
2351 | { | |
2352 | Target_powerpc<size, big_endian>* target = | |
2353 | static_cast<Target_powerpc<size, big_endian>*>( | |
2354 | parameters->sized_target<size, big_endian>()); | |
2355 | if (target->abiversion() == 0) | |
2356 | target->set_abiversion(this->abiversion()); | |
2357 | else if (target->abiversion() != this->abiversion()) | |
2358 | gold_error(_("%s: ABI version %d is not compatible " | |
2359 | "with ABI version %d output"), | |
2360 | this->name().c_str(), | |
2361 | this->abiversion(), target->abiversion()); | |
2362 | ||
2363 | } | |
2364 | } | |
2365 | ||
f35c4853 | 2366 | // Call Sized_dynobj::base_read_symbols to read the symbols then |
dc3714f3 AM |
2367 | // read .opd from a dynamic object, filling in opd_ent_ vector, |
2368 | ||
2369 | template<int size, bool big_endian> | |
2370 | void | |
2371 | Powerpc_dynobj<size, big_endian>::do_read_symbols(Read_symbols_data* sd) | |
2372 | { | |
f35c4853 | 2373 | this->base_read_symbols(sd); |
dc3714f3 AM |
2374 | if (size == 64) |
2375 | { | |
2376 | const int shdr_size = elfcpp::Elf_sizes<size>::shdr_size; | |
2377 | const unsigned char* const pshdrs = sd->section_headers->data(); | |
2378 | const unsigned char* namesu = sd->section_names->data(); | |
2379 | const char* names = reinterpret_cast<const char*>(namesu); | |
2380 | const unsigned char* s = NULL; | |
2381 | const unsigned char* opd; | |
2382 | section_size_type opd_size; | |
2383 | ||
2384 | // Find and read .opd section. | |
2385 | while (1) | |
2386 | { | |
2387 | s = this->template find_shdr<size, big_endian>(pshdrs, ".opd", names, | |
2388 | sd->section_names_size, | |
2389 | s); | |
2390 | if (s == NULL) | |
2391 | return; | |
2392 | ||
2393 | typename elfcpp::Shdr<size, big_endian> shdr(s); | |
2394 | if (shdr.get_sh_type() == elfcpp::SHT_PROGBITS | |
2395 | && (shdr.get_sh_flags() & elfcpp::SHF_ALLOC) != 0) | |
2396 | { | |
b4f7960d AM |
2397 | if (this->abiversion() == 0) |
2398 | this->set_abiversion(1); | |
2399 | else if (this->abiversion() > 1) | |
2400 | gold_error(_("%s: .opd invalid in abiv%d"), | |
2401 | this->name().c_str(), this->abiversion()); | |
2402 | ||
dc3714f3 AM |
2403 | this->opd_shndx_ = (s - pshdrs) / shdr_size; |
2404 | this->opd_address_ = shdr.get_sh_addr(); | |
2405 | opd_size = convert_to_section_size_type(shdr.get_sh_size()); | |
2406 | opd = this->get_view(shdr.get_sh_offset(), opd_size, | |
2407 | true, false); | |
2408 | break; | |
2409 | } | |
2410 | } | |
2411 | ||
2412 | // Build set of executable sections. | |
2413 | // Using a set is probably overkill. There is likely to be only | |
2414 | // a few executable sections, typically .init, .text and .fini, | |
2415 | // and they are generally grouped together. | |
2416 | typedef std::set<Sec_info> Exec_sections; | |
2417 | Exec_sections exec_sections; | |
2418 | s = pshdrs; | |
2419 | for (unsigned int i = 1; i < this->shnum(); ++i, s += shdr_size) | |
2420 | { | |
2421 | typename elfcpp::Shdr<size, big_endian> shdr(s); | |
2422 | if (shdr.get_sh_type() == elfcpp::SHT_PROGBITS | |
2423 | && ((shdr.get_sh_flags() | |
2424 | & (elfcpp::SHF_ALLOC | elfcpp::SHF_EXECINSTR)) | |
2425 | == (elfcpp::SHF_ALLOC | elfcpp::SHF_EXECINSTR)) | |
2426 | && shdr.get_sh_size() != 0) | |
2427 | { | |
2428 | exec_sections.insert(Sec_info(shdr.get_sh_addr(), | |
2429 | shdr.get_sh_size(), i)); | |
2430 | } | |
2431 | } | |
2432 | if (exec_sections.empty()) | |
2433 | return; | |
2434 | ||
2435 | // Look over the OPD entries. This is complicated by the fact | |
2436 | // that some binaries will use two-word entries while others | |
2437 | // will use the standard three-word entries. In most cases | |
2438 | // the third word (the environment pointer for languages like | |
2439 | // Pascal) is unused and will be zero. If the third word is | |
2440 | // used it should not be pointing into executable sections, | |
2441 | // I think. | |
2442 | this->init_opd(opd_size); | |
2443 | for (const unsigned char* p = opd; p < opd + opd_size; p += 8) | |
2444 | { | |
2445 | typedef typename elfcpp::Swap<64, big_endian>::Valtype Valtype; | |
2446 | const Valtype* valp = reinterpret_cast<const Valtype*>(p); | |
2447 | Valtype val = elfcpp::Swap<64, big_endian>::readval(valp); | |
2448 | if (val == 0) | |
2449 | // Chances are that this is the third word of an OPD entry. | |
2450 | continue; | |
2451 | typename Exec_sections::const_iterator e | |
2452 | = exec_sections.upper_bound(Sec_info(val, 0, 0)); | |
2453 | if (e != exec_sections.begin()) | |
2454 | { | |
2455 | --e; | |
2456 | if (e->start <= val && val < e->start + e->len) | |
2457 | { | |
2458 | // We have an address in an executable section. | |
2459 | // VAL ought to be the function entry, set it up. | |
2460 | this->set_opd_ent(p - opd, e->shndx, val); | |
2461 | // Skip second word of OPD entry, the TOC pointer. | |
2462 | p += 8; | |
2463 | } | |
2464 | } | |
2465 | // If we didn't match any executable sections, we likely | |
2466 | // have a non-zero third word in the OPD entry. | |
2467 | } | |
2468 | } | |
2469 | } | |
2470 | ||
5edad15d AM |
2471 | // Relocate sections. |
2472 | ||
2473 | template<int size, bool big_endian> | |
2474 | void | |
2475 | Powerpc_relobj<size, big_endian>::do_relocate_sections( | |
2476 | const Symbol_table* symtab, const Layout* layout, | |
2477 | const unsigned char* pshdrs, Output_file* of, | |
2478 | typename Sized_relobj_file<size, big_endian>::Views* pviews) | |
2479 | { | |
2480 | unsigned int start = 1; | |
2481 | if (size == 64 | |
2482 | && this->relatoc_ != 0 | |
2483 | && !parameters->options().relocatable()) | |
2484 | { | |
2485 | // Relocate .toc first. | |
2486 | this->relocate_section_range(symtab, layout, pshdrs, of, pviews, | |
2487 | this->relatoc_, this->relatoc_); | |
2488 | this->relocate_section_range(symtab, layout, pshdrs, of, pviews, | |
2489 | 1, this->relatoc_ - 1); | |
2490 | start = this->relatoc_ + 1; | |
2491 | } | |
2492 | this->relocate_section_range(symtab, layout, pshdrs, of, pviews, | |
2493 | start, this->shnum() - 1); | |
2d7ad24e AM |
2494 | |
2495 | if (!parameters->options().output_is_position_independent()) | |
2496 | { | |
2497 | Target_powerpc<size, big_endian>* target | |
2498 | = static_cast<Target_powerpc<size, big_endian>*>( | |
2499 | parameters->sized_target<size, big_endian>()); | |
2500 | if (target->lplt_section() && target->lplt_section()->data_size() != 0) | |
2501 | { | |
2502 | const section_size_type offset = target->lplt_section()->offset(); | |
2503 | const section_size_type oview_size | |
2504 | = convert_to_section_size_type(target->lplt_section()->data_size()); | |
2505 | unsigned char* const oview = of->get_output_view(offset, oview_size); | |
2506 | ||
2507 | bool modified = false; | |
2508 | unsigned int nsyms = this->local_symbol_count(); | |
2509 | for (unsigned int i = 0; i < nsyms; i++) | |
2510 | if (this->local_has_plt_offset(i)) | |
2511 | { | |
2512 | Address value = this->local_symbol_value(i, 0); | |
2513 | if (size == 64) | |
2514 | value += ppc64_local_entry_offset(i); | |
2515 | size_t off = this->local_plt_offset(i); | |
2516 | elfcpp::Swap<size, big_endian>::writeval(oview + off, value); | |
2517 | modified = true; | |
2518 | } | |
2519 | if (modified) | |
2520 | of->write_output_view(offset, oview_size, oview); | |
2521 | } | |
2522 | } | |
5edad15d AM |
2523 | } |
2524 | ||
f43ba157 | 2525 | // Set up some symbols. |
26a4e9cb AM |
2526 | |
2527 | template<int size, bool big_endian> | |
2528 | void | |
f43ba157 AM |
2529 | Target_powerpc<size, big_endian>::do_define_standard_symbols( |
2530 | Symbol_table* symtab, | |
2531 | Layout* layout) | |
26a4e9cb AM |
2532 | { |
2533 | if (size == 32) | |
2534 | { | |
bb66a627 AM |
2535 | // Define _GLOBAL_OFFSET_TABLE_ to ensure it isn't seen as |
2536 | // undefined when scanning relocs (and thus requires | |
26a4e9cb AM |
2537 | // non-relative dynamic relocs). The proper value will be |
2538 | // updated later. | |
2539 | Symbol *gotsym = symtab->lookup("_GLOBAL_OFFSET_TABLE_", NULL); | |
2540 | if (gotsym != NULL && gotsym->is_undefined()) | |
2541 | { | |
2542 | Target_powerpc<size, big_endian>* target = | |
2543 | static_cast<Target_powerpc<size, big_endian>*>( | |
2544 | parameters->sized_target<size, big_endian>()); | |
2545 | Output_data_got_powerpc<size, big_endian>* got | |
2546 | = target->got_section(symtab, layout); | |
2547 | symtab->define_in_output_data("_GLOBAL_OFFSET_TABLE_", NULL, | |
2548 | Symbol_table::PREDEFINED, | |
2549 | got, 0, 0, | |
2550 | elfcpp::STT_OBJECT, | |
bb66a627 | 2551 | elfcpp::STB_LOCAL, |
26a4e9cb AM |
2552 | elfcpp::STV_HIDDEN, 0, |
2553 | false, false); | |
2554 | } | |
2555 | ||
2556 | // Define _SDA_BASE_ at the start of the .sdata section + 32768. | |
2557 | Symbol *sdasym = symtab->lookup("_SDA_BASE_", NULL); | |
2558 | if (sdasym != NULL && sdasym->is_undefined()) | |
2559 | { | |
2560 | Output_data_space* sdata = new Output_data_space(4, "** sdata"); | |
2561 | Output_section* os | |
2562 | = layout->add_output_section_data(".sdata", 0, | |
2563 | elfcpp::SHF_ALLOC | |
2564 | | elfcpp::SHF_WRITE, | |
2565 | sdata, ORDER_SMALL_DATA, false); | |
2566 | symtab->define_in_output_data("_SDA_BASE_", NULL, | |
2567 | Symbol_table::PREDEFINED, | |
2568 | os, 32768, 0, elfcpp::STT_OBJECT, | |
2569 | elfcpp::STB_LOCAL, elfcpp::STV_HIDDEN, | |
2570 | 0, false, false); | |
2571 | } | |
2572 | } | |
b4f7960d AM |
2573 | else |
2574 | { | |
2575 | // Define .TOC. as for 32-bit _GLOBAL_OFFSET_TABLE_ | |
2576 | Symbol *gotsym = symtab->lookup(".TOC.", NULL); | |
2577 | if (gotsym != NULL && gotsym->is_undefined()) | |
2578 | { | |
2579 | Target_powerpc<size, big_endian>* target = | |
2580 | static_cast<Target_powerpc<size, big_endian>*>( | |
2581 | parameters->sized_target<size, big_endian>()); | |
2582 | Output_data_got_powerpc<size, big_endian>* got | |
2583 | = target->got_section(symtab, layout); | |
2584 | symtab->define_in_output_data(".TOC.", NULL, | |
2585 | Symbol_table::PREDEFINED, | |
2586 | got, 0x8000, 0, | |
2587 | elfcpp::STT_OBJECT, | |
2588 | elfcpp::STB_LOCAL, | |
2589 | elfcpp::STV_HIDDEN, 0, | |
2590 | false, false); | |
2591 | } | |
2592 | } | |
34e0882b AM |
2593 | |
2594 | this->tls_get_addr_ = symtab->lookup("__tls_get_addr"); | |
2595 | if (parameters->options().tls_get_addr_optimize() | |
2596 | && this->tls_get_addr_ != NULL | |
2597 | && this->tls_get_addr_->in_reg()) | |
2598 | this->tls_get_addr_opt_ = symtab->lookup("__tls_get_addr_opt"); | |
2599 | if (this->tls_get_addr_opt_ != NULL) | |
2600 | { | |
2601 | if (this->tls_get_addr_->is_undefined() | |
2602 | || this->tls_get_addr_->is_from_dynobj()) | |
2603 | { | |
2604 | // Make it seem as if references to __tls_get_addr are | |
2605 | // really to __tls_get_addr_opt, so the latter symbol is | |
2606 | // made dynamic, not the former. | |
2607 | this->tls_get_addr_->clear_in_reg(); | |
2608 | this->tls_get_addr_opt_->set_in_reg(); | |
2609 | } | |
2610 | // We have a non-dynamic definition for __tls_get_addr. | |
2611 | // Make __tls_get_addr_opt the same, if it does not already have | |
2612 | // a non-dynamic definition. | |
2613 | else if (this->tls_get_addr_opt_->is_undefined() | |
2614 | || this->tls_get_addr_opt_->is_from_dynobj()) | |
2615 | { | |
2616 | Sized_symbol<size>* from | |
2617 | = static_cast<Sized_symbol<size>*>(this->tls_get_addr_); | |
2618 | Sized_symbol<size>* to | |
2619 | = static_cast<Sized_symbol<size>*>(this->tls_get_addr_opt_); | |
2620 | symtab->clone<size>(to, from); | |
2621 | } | |
2622 | } | |
26a4e9cb AM |
2623 | } |
2624 | ||
cf43a2fe AM |
2625 | // Set up PowerPC target specific relobj. |
2626 | ||
2627 | template<int size, bool big_endian> | |
2628 | Object* | |
2629 | Target_powerpc<size, big_endian>::do_make_elf_object( | |
2630 | const std::string& name, | |
2631 | Input_file* input_file, | |
2632 | off_t offset, const elfcpp::Ehdr<size, big_endian>& ehdr) | |
2633 | { | |
2634 | int et = ehdr.get_e_type(); | |
957564c9 AS |
2635 | // ET_EXEC files are valid input for --just-symbols/-R, |
2636 | // and we treat them as relocatable objects. | |
2637 | if (et == elfcpp::ET_REL | |
2638 | || (et == elfcpp::ET_EXEC && input_file->just_symbols())) | |
cf43a2fe AM |
2639 | { |
2640 | Powerpc_relobj<size, big_endian>* obj = | |
c9269dff | 2641 | new Powerpc_relobj<size, big_endian>(name, input_file, offset, ehdr); |
cf43a2fe AM |
2642 | obj->setup(); |
2643 | return obj; | |
2644 | } | |
2645 | else if (et == elfcpp::ET_DYN) | |
2646 | { | |
dc3714f3 AM |
2647 | Powerpc_dynobj<size, big_endian>* obj = |
2648 | new Powerpc_dynobj<size, big_endian>(name, input_file, offset, ehdr); | |
cf43a2fe AM |
2649 | obj->setup(); |
2650 | return obj; | |
2651 | } | |
2652 | else | |
2653 | { | |
c9269dff | 2654 | gold_error(_("%s: unsupported ELF file type %d"), name.c_str(), et); |
cf43a2fe AM |
2655 | return NULL; |
2656 | } | |
2657 | } | |
2658 | ||
2659 | template<int size, bool big_endian> | |
2660 | class Output_data_got_powerpc : public Output_data_got<size, big_endian> | |
2661 | { | |
2662 | public: | |
2663 | typedef typename elfcpp::Elf_types<size>::Elf_Addr Valtype; | |
2664 | typedef Output_data_reloc<elfcpp::SHT_RELA, true, size, big_endian> Rela_dyn; | |
2665 | ||
2666 | Output_data_got_powerpc(Symbol_table* symtab, Layout* layout) | |
2667 | : Output_data_got<size, big_endian>(), | |
2668 | symtab_(symtab), layout_(layout), | |
2669 | header_ent_cnt_(size == 32 ? 3 : 1), | |
2670 | header_index_(size == 32 ? 0x2000 : 0) | |
751e4d66 AM |
2671 | { |
2672 | if (size == 64) | |
2673 | this->set_addralign(256); | |
2674 | } | |
cf43a2fe | 2675 | |
e84fe78f AM |
2676 | // Override all the Output_data_got methods we use so as to first call |
2677 | // reserve_ent(). | |
2678 | bool | |
2679 | add_global(Symbol* gsym, unsigned int got_type) | |
2680 | { | |
2681 | this->reserve_ent(); | |
2682 | return Output_data_got<size, big_endian>::add_global(gsym, got_type); | |
2683 | } | |
2684 | ||
2685 | bool | |
2686 | add_global_plt(Symbol* gsym, unsigned int got_type) | |
2687 | { | |
2688 | this->reserve_ent(); | |
2689 | return Output_data_got<size, big_endian>::add_global_plt(gsym, got_type); | |
2690 | } | |
2691 | ||
2692 | bool | |
2693 | add_global_tls(Symbol* gsym, unsigned int got_type) | |
2694 | { return this->add_global_plt(gsym, got_type); } | |
2695 | ||
2696 | void | |
2697 | add_global_with_rel(Symbol* gsym, unsigned int got_type, | |
2698 | Output_data_reloc_generic* rel_dyn, unsigned int r_type) | |
2699 | { | |
2700 | this->reserve_ent(); | |
2701 | Output_data_got<size, big_endian>:: | |
2702 | add_global_with_rel(gsym, got_type, rel_dyn, r_type); | |
2703 | } | |
2704 | ||
2705 | void | |
2706 | add_global_pair_with_rel(Symbol* gsym, unsigned int got_type, | |
2707 | Output_data_reloc_generic* rel_dyn, | |
2708 | unsigned int r_type_1, unsigned int r_type_2) | |
2709 | { | |
aacb3b6d AM |
2710 | if (gsym->has_got_offset(got_type)) |
2711 | return; | |
2712 | ||
e84fe78f AM |
2713 | this->reserve_ent(2); |
2714 | Output_data_got<size, big_endian>:: | |
2715 | add_global_pair_with_rel(gsym, got_type, rel_dyn, r_type_1, r_type_2); | |
2716 | } | |
2717 | ||
2718 | bool | |
2719 | add_local(Relobj* object, unsigned int sym_index, unsigned int got_type) | |
2720 | { | |
2721 | this->reserve_ent(); | |
2722 | return Output_data_got<size, big_endian>::add_local(object, sym_index, | |
2723 | got_type); | |
2724 | } | |
2725 | ||
2726 | bool | |
2727 | add_local_plt(Relobj* object, unsigned int sym_index, unsigned int got_type) | |
2728 | { | |
2729 | this->reserve_ent(); | |
2730 | return Output_data_got<size, big_endian>::add_local_plt(object, sym_index, | |
2731 | got_type); | |
2732 | } | |
2733 | ||
2734 | bool | |
2735 | add_local_tls(Relobj* object, unsigned int sym_index, unsigned int got_type) | |
2736 | { return this->add_local_plt(object, sym_index, got_type); } | |
2737 | ||
2738 | void | |
2739 | add_local_tls_pair(Relobj* object, unsigned int sym_index, | |
2740 | unsigned int got_type, | |
2741 | Output_data_reloc_generic* rel_dyn, | |
2742 | unsigned int r_type) | |
2743 | { | |
aacb3b6d AM |
2744 | if (object->local_has_got_offset(sym_index, got_type)) |
2745 | return; | |
2746 | ||
e84fe78f AM |
2747 | this->reserve_ent(2); |
2748 | Output_data_got<size, big_endian>:: | |
2749 | add_local_tls_pair(object, sym_index, got_type, rel_dyn, r_type); | |
2750 | } | |
2751 | ||
2752 | unsigned int | |
2753 | add_constant(Valtype constant) | |
2754 | { | |
2755 | this->reserve_ent(); | |
2756 | return Output_data_got<size, big_endian>::add_constant(constant); | |
2757 | } | |
2758 | ||
dd93cd0a AM |
2759 | unsigned int |
2760 | add_constant_pair(Valtype c1, Valtype c2) | |
2761 | { | |
2762 | this->reserve_ent(2); | |
e84fe78f | 2763 | return Output_data_got<size, big_endian>::add_constant_pair(c1, c2); |
dd93cd0a AM |
2764 | } |
2765 | ||
2766 | // Offset of _GLOBAL_OFFSET_TABLE_. | |
cf43a2fe AM |
2767 | unsigned int |
2768 | g_o_t() const | |
2769 | { | |
2770 | return this->got_offset(this->header_index_); | |
42cacb20 | 2771 | } |
cf43a2fe | 2772 | |
dd93cd0a AM |
2773 | // Offset of base used to access the GOT/TOC. |
2774 | // The got/toc pointer reg will be set to this value. | |
26a4e9cb | 2775 | Valtype |
dd93cd0a AM |
2776 | got_base_offset(const Powerpc_relobj<size, big_endian>* object) const |
2777 | { | |
2778 | if (size == 32) | |
2779 | return this->g_o_t(); | |
2780 | else | |
2781 | return (this->output_section()->address() | |
2782 | + object->toc_base_offset() | |
2783 | - this->address()); | |
2784 | } | |
2785 | ||
cf43a2fe AM |
2786 | // Ensure our GOT has a header. |
2787 | void | |
2788 | set_final_data_size() | |
2789 | { | |
2790 | if (this->header_ent_cnt_ != 0) | |
2791 | this->make_header(); | |
2792 | Output_data_got<size, big_endian>::set_final_data_size(); | |
2793 | } | |
2794 | ||
2795 | // First word of GOT header needs some values that are not | |
2796 | // handled by Output_data_got so poke them in here. | |
2797 | // For 32-bit, address of .dynamic, for 64-bit, address of TOCbase. | |
2798 | void | |
2799 | do_write(Output_file* of) | |
2800 | { | |
c9824451 AM |
2801 | Valtype val = 0; |
2802 | if (size == 32 && this->layout_->dynamic_data() != NULL) | |
2803 | val = this->layout_->dynamic_section()->address(); | |
2804 | if (size == 64) | |
2805 | val = this->output_section()->address() + 0x8000; | |
2806 | this->replace_constant(this->header_index_, val); | |
cf43a2fe AM |
2807 | Output_data_got<size, big_endian>::do_write(of); |
2808 | } | |
2809 | ||
2810 | private: | |
2811 | void | |
2812 | reserve_ent(unsigned int cnt = 1) | |
2813 | { | |
2814 | if (this->header_ent_cnt_ == 0) | |
2815 | return; | |
2816 | if (this->num_entries() + cnt > this->header_index_) | |
2817 | this->make_header(); | |
2818 | } | |
2819 | ||
2820 | void | |
2821 | make_header() | |
2822 | { | |
2823 | this->header_ent_cnt_ = 0; | |
2824 | this->header_index_ = this->num_entries(); | |
2825 | if (size == 32) | |
2826 | { | |
2827 | Output_data_got<size, big_endian>::add_constant(0); | |
2828 | Output_data_got<size, big_endian>::add_constant(0); | |
2829 | Output_data_got<size, big_endian>::add_constant(0); | |
2830 | ||
2831 | // Define _GLOBAL_OFFSET_TABLE_ at the header | |
bb66a627 AM |
2832 | Symbol *gotsym = this->symtab_->lookup("_GLOBAL_OFFSET_TABLE_", NULL); |
2833 | if (gotsym != NULL) | |
2834 | { | |
2835 | Sized_symbol<size>* sym = static_cast<Sized_symbol<size>*>(gotsym); | |
2836 | sym->set_value(this->g_o_t()); | |
2837 | } | |
2838 | else | |
2839 | this->symtab_->define_in_output_data("_GLOBAL_OFFSET_TABLE_", NULL, | |
2840 | Symbol_table::PREDEFINED, | |
2841 | this, this->g_o_t(), 0, | |
2842 | elfcpp::STT_OBJECT, | |
2843 | elfcpp::STB_LOCAL, | |
2844 | elfcpp::STV_HIDDEN, 0, | |
2845 | false, false); | |
cf43a2fe AM |
2846 | } |
2847 | else | |
2848 | Output_data_got<size, big_endian>::add_constant(0); | |
2849 | } | |
2850 | ||
2851 | // Stashed pointers. | |
2852 | Symbol_table* symtab_; | |
2853 | Layout* layout_; | |
2854 | ||
2855 | // GOT header size. | |
2856 | unsigned int header_ent_cnt_; | |
2857 | // GOT header index. | |
2858 | unsigned int header_index_; | |
42cacb20 DE |
2859 | }; |
2860 | ||
2861 | // Get the GOT section, creating it if necessary. | |
2862 | ||
2863 | template<int size, bool big_endian> | |
cf43a2fe | 2864 | Output_data_got_powerpc<size, big_endian>* |
42cacb20 DE |
2865 | Target_powerpc<size, big_endian>::got_section(Symbol_table* symtab, |
2866 | Layout* layout) | |
2867 | { | |
2868 | if (this->got_ == NULL) | |
2869 | { | |
2870 | gold_assert(symtab != NULL && layout != NULL); | |
2871 | ||
cf43a2fe AM |
2872 | this->got_ |
2873 | = new Output_data_got_powerpc<size, big_endian>(symtab, layout); | |
42cacb20 DE |
2874 | |
2875 | layout->add_output_section_data(".got", elfcpp::SHT_PROGBITS, | |
2876 | elfcpp::SHF_ALLOC | elfcpp::SHF_WRITE, | |
22f0da72 | 2877 | this->got_, ORDER_DATA, false); |
42cacb20 DE |
2878 | } |
2879 | ||
2880 | return this->got_; | |
2881 | } | |
2882 | ||
2883 | // Get the dynamic reloc section, creating it if necessary. | |
2884 | ||
2885 | template<int size, bool big_endian> | |
2886 | typename Target_powerpc<size, big_endian>::Reloc_section* | |
2887 | Target_powerpc<size, big_endian>::rela_dyn_section(Layout* layout) | |
2888 | { | |
2889 | if (this->rela_dyn_ == NULL) | |
2890 | { | |
2891 | gold_assert(layout != NULL); | |
2892 | this->rela_dyn_ = new Reloc_section(parameters->options().combreloc()); | |
2893 | layout->add_output_section_data(".rela.dyn", elfcpp::SHT_RELA, | |
22f0da72 ILT |
2894 | elfcpp::SHF_ALLOC, this->rela_dyn_, |
2895 | ORDER_DYNAMIC_RELOCS, false); | |
42cacb20 DE |
2896 | } |
2897 | return this->rela_dyn_; | |
2898 | } | |
2899 | ||
b3ccdeb5 AM |
2900 | // Similarly, but for ifunc symbols get the one for ifunc. |
2901 | ||
2902 | template<int size, bool big_endian> | |
2903 | typename Target_powerpc<size, big_endian>::Reloc_section* | |
2904 | Target_powerpc<size, big_endian>::rela_dyn_section(Symbol_table* symtab, | |
2905 | Layout* layout, | |
2906 | bool for_ifunc) | |
2907 | { | |
2908 | if (!for_ifunc) | |
2909 | return this->rela_dyn_section(layout); | |
2910 | ||
2911 | if (this->iplt_ == NULL) | |
2912 | this->make_iplt_section(symtab, layout); | |
2913 | return this->iplt_->rel_plt(); | |
2914 | } | |
2915 | ||
ec661b9d AM |
2916 | class Stub_control |
2917 | { | |
2918 | public: | |
2919 | // Determine the stub group size. The group size is the absolute | |
2920 | // value of the parameter --stub-group-size. If --stub-group-size | |
a5018ae5 | 2921 | // is passed a negative value, we restrict stubs to be always after |
ec661b9d | 2922 | // the stubbed branches. |
1c3a5fbe AM |
2923 | Stub_control(int32_t size, bool no_size_errors, bool multi_os) |
2924 | : stub_group_size_(abs(size)), stubs_always_after_branch_(size < 0), | |
2925 | suppress_size_errors_(no_size_errors), multi_os_(multi_os), | |
2926 | state_(NO_GROUP), group_size_(0), group_start_addr_(0), | |
2927 | owner_(NULL), output_section_(NULL) | |
ec661b9d | 2928 | { |
ec661b9d AM |
2929 | } |
2930 | ||
2931 | // Return true iff input section can be handled by current stub | |
2932 | // group. | |
2933 | bool | |
2934 | can_add_to_stub_group(Output_section* o, | |
2935 | const Output_section::Input_section* i, | |
2936 | bool has14); | |
2937 | ||
2938 | const Output_section::Input_section* | |
2939 | owner() | |
2940 | { return owner_; } | |
2941 | ||
2942 | Output_section* | |
2943 | output_section() | |
2944 | { return output_section_; } | |
2945 | ||
a20605cf AM |
2946 | void |
2947 | set_output_and_owner(Output_section* o, | |
2948 | const Output_section::Input_section* i) | |
2949 | { | |
2950 | this->output_section_ = o; | |
2951 | this->owner_ = i; | |
2952 | } | |
2953 | ||
ec661b9d AM |
2954 | private: |
2955 | typedef enum | |
2956 | { | |
1c3a5fbe | 2957 | // Initial state. |
ec661b9d | 2958 | NO_GROUP, |
1c3a5fbe | 2959 | // Adding group sections before the stubs. |
ec661b9d | 2960 | FINDING_STUB_SECTION, |
1c3a5fbe | 2961 | // Adding group sections after the stubs. |
ec661b9d AM |
2962 | HAS_STUB_SECTION |
2963 | } State; | |
2964 | ||
ec661b9d | 2965 | uint32_t stub_group_size_; |
a5018ae5 | 2966 | bool stubs_always_after_branch_; |
ec661b9d | 2967 | bool suppress_size_errors_; |
1c3a5fbe AM |
2968 | // True if a stub group can serve multiple output sections. |
2969 | bool multi_os_; | |
2970 | State state_; | |
8a37735f AM |
2971 | // Current max size of group. Starts at stub_group_size_ but is |
2972 | // reduced to stub_group_size_/1024 on seeing a section with | |
2973 | // external conditional branches. | |
2974 | uint32_t group_size_; | |
a5018ae5 | 2975 | uint64_t group_start_addr_; |
57f6d32d AM |
2976 | // owner_ and output_section_ specify the section to which stubs are |
2977 | // attached. The stubs are placed at the end of this section. | |
ec661b9d AM |
2978 | const Output_section::Input_section* owner_; |
2979 | Output_section* output_section_; | |
2980 | }; | |
2981 | ||
0cfdc767 | 2982 | // Return true iff input section can be handled by current stub |
a5018ae5 AM |
2983 | // group. Sections are presented to this function in order, |
2984 | // so the first section is the head of the group. | |
ec661b9d AM |
2985 | |
2986 | bool | |
2987 | Stub_control::can_add_to_stub_group(Output_section* o, | |
2988 | const Output_section::Input_section* i, | |
2989 | bool has14) | |
2990 | { | |
ec661b9d AM |
2991 | bool whole_sec = o->order() == ORDER_INIT || o->order() == ORDER_FINI; |
2992 | uint64_t this_size; | |
2993 | uint64_t start_addr = o->address(); | |
2994 | ||
2995 | if (whole_sec) | |
2996 | // .init and .fini sections are pasted together to form a single | |
2997 | // function. We can't be adding stubs in the middle of the function. | |
2998 | this_size = o->data_size(); | |
2999 | else | |
3000 | { | |
3001 | start_addr += i->relobj()->output_section_offset(i->shndx()); | |
3002 | this_size = i->data_size(); | |
3003 | } | |
57f6d32d | 3004 | |
a5018ae5 | 3005 | uint64_t end_addr = start_addr + this_size; |
8a37735f AM |
3006 | uint32_t group_size = this->stub_group_size_; |
3007 | if (has14) | |
3008 | this->group_size_ = group_size = group_size >> 10; | |
ec661b9d | 3009 | |
57f6d32d | 3010 | if (this_size > group_size && !this->suppress_size_errors_) |
ec661b9d AM |
3011 | gold_warning(_("%s:%s exceeds group size"), |
3012 | i->relobj()->name().c_str(), | |
3013 | i->relobj()->section_name(i->shndx()).c_str()); | |
3014 | ||
afe002dd AM |
3015 | gold_debug(DEBUG_TARGET, "maybe add%s %s:%s size=%#llx total=%#llx", |
3016 | has14 ? " 14bit" : "", | |
3017 | i->relobj()->name().c_str(), | |
3018 | i->relobj()->section_name(i->shndx()).c_str(), | |
3019 | (long long) this_size, | |
a5018ae5 AM |
3020 | (this->state_ == NO_GROUP |
3021 | ? this_size | |
3022 | : (long long) end_addr - this->group_start_addr_)); | |
afe002dd | 3023 | |
1c3a5fbe AM |
3024 | if (this->state_ == NO_GROUP) |
3025 | { | |
3026 | // Only here on very first use of Stub_control | |
3027 | this->owner_ = i; | |
3028 | this->output_section_ = o; | |
3029 | this->state_ = FINDING_STUB_SECTION; | |
3030 | this->group_size_ = group_size; | |
3031 | this->group_start_addr_ = start_addr; | |
3032 | return true; | |
3033 | } | |
3034 | else if (!this->multi_os_ && this->output_section_ != o) | |
3035 | ; | |
3036 | else if (this->state_ == HAS_STUB_SECTION) | |
ec661b9d | 3037 | { |
a5018ae5 | 3038 | // Can we add this section, which is after the stubs, to the |
57f6d32d | 3039 | // group? |
a5018ae5 | 3040 | if (end_addr - this->group_start_addr_ <= this->group_size_) |
57f6d32d | 3041 | return true; |
ec661b9d | 3042 | } |
a5018ae5 | 3043 | else if (this->state_ == FINDING_STUB_SECTION) |
ec661b9d | 3044 | { |
a5018ae5 AM |
3045 | if ((whole_sec && this->output_section_ == o) |
3046 | || end_addr - this->group_start_addr_ <= this->group_size_) | |
57f6d32d | 3047 | { |
a5018ae5 | 3048 | // Stubs are added at the end of "owner_". |
57f6d32d AM |
3049 | this->owner_ = i; |
3050 | this->output_section_ = o; | |
a5018ae5 | 3051 | return true; |
57f6d32d | 3052 | } |
a5018ae5 AM |
3053 | // The group before the stubs has reached maximum size. |
3054 | // Now see about adding sections after the stubs to the | |
3055 | // group. If the current section has a 14-bit branch and | |
3056 | // the group before the stubs exceeds group_size_ (because | |
3057 | // they didn't have 14-bit branches), don't add sections | |
3058 | // after the stubs: The size of stubs for such a large | |
3059 | // group may exceed the reach of a 14-bit branch. | |
3060 | if (!this->stubs_always_after_branch_ | |
3061 | && this_size <= this->group_size_ | |
3062 | && start_addr - this->group_start_addr_ <= this->group_size_) | |
57f6d32d | 3063 | { |
a5018ae5 AM |
3064 | gold_debug(DEBUG_TARGET, "adding after stubs"); |
3065 | this->state_ = HAS_STUB_SECTION; | |
3066 | this->group_start_addr_ = start_addr; | |
57f6d32d AM |
3067 | return true; |
3068 | } | |
ec661b9d | 3069 | } |
a5018ae5 AM |
3070 | else |
3071 | gold_unreachable(); | |
57f6d32d | 3072 | |
1c3a5fbe AM |
3073 | gold_debug(DEBUG_TARGET, |
3074 | !this->multi_os_ && this->output_section_ != o | |
3075 | ? "nope, new output section\n" | |
3076 | : "nope, didn't fit\n"); | |
afe002dd | 3077 | |
57f6d32d AM |
3078 | // The section fails to fit in the current group. Set up a few |
3079 | // things for the next group. owner_ and output_section_ will be | |
3080 | // set later after we've retrieved those values for the current | |
3081 | // group. | |
3082 | this->state_ = FINDING_STUB_SECTION; | |
8a37735f | 3083 | this->group_size_ = group_size; |
a5018ae5 | 3084 | this->group_start_addr_ = start_addr; |
57f6d32d | 3085 | return false; |
ec661b9d AM |
3086 | } |
3087 | ||
3088 | // Look over all the input sections, deciding where to place stubs. | |
3089 | ||
3090 | template<int size, bool big_endian> | |
3091 | void | |
3092 | Target_powerpc<size, big_endian>::group_sections(Layout* layout, | |
a3e60ddb AM |
3093 | const Task*, |
3094 | bool no_size_errors) | |
ec661b9d | 3095 | { |
1c3a5fbe AM |
3096 | Stub_control stub_control(this->stub_group_size_, no_size_errors, |
3097 | parameters->options().stub_group_multi()); | |
ec661b9d AM |
3098 | |
3099 | // Group input sections and insert stub table | |
a3e60ddb AM |
3100 | Stub_table_owner* table_owner = NULL; |
3101 | std::vector<Stub_table_owner*> tables; | |
ec661b9d AM |
3102 | Layout::Section_list section_list; |
3103 | layout->get_executable_sections(§ion_list); | |
3104 | std::stable_sort(section_list.begin(), section_list.end(), Sort_sections()); | |
a5018ae5 AM |
3105 | for (Layout::Section_list::iterator o = section_list.begin(); |
3106 | o != section_list.end(); | |
ec661b9d AM |
3107 | ++o) |
3108 | { | |
3109 | typedef Output_section::Input_section_list Input_section_list; | |
a5018ae5 AM |
3110 | for (Input_section_list::const_iterator i |
3111 | = (*o)->input_sections().begin(); | |
3112 | i != (*o)->input_sections().end(); | |
ec661b9d AM |
3113 | ++i) |
3114 | { | |
a3e60ddb AM |
3115 | if (i->is_input_section() |
3116 | || i->is_relaxed_input_section()) | |
ec661b9d AM |
3117 | { |
3118 | Powerpc_relobj<size, big_endian>* ppcobj = static_cast | |
3119 | <Powerpc_relobj<size, big_endian>*>(i->relobj()); | |
3120 | bool has14 = ppcobj->has_14bit_branch(i->shndx()); | |
3121 | if (!stub_control.can_add_to_stub_group(*o, &*i, has14)) | |
3122 | { | |
a3e60ddb AM |
3123 | table_owner->output_section = stub_control.output_section(); |
3124 | table_owner->owner = stub_control.owner(); | |
a20605cf | 3125 | stub_control.set_output_and_owner(*o, &*i); |
a3e60ddb | 3126 | table_owner = NULL; |
ec661b9d | 3127 | } |
a3e60ddb AM |
3128 | if (table_owner == NULL) |
3129 | { | |
3130 | table_owner = new Stub_table_owner; | |
3131 | tables.push_back(table_owner); | |
3132 | } | |
3133 | ppcobj->set_stub_table(i->shndx(), tables.size() - 1); | |
ec661b9d AM |
3134 | } |
3135 | } | |
3136 | } | |
a3e60ddb | 3137 | if (table_owner != NULL) |
0cfdc767 | 3138 | { |
a5018ae5 AM |
3139 | table_owner->output_section = stub_control.output_section(); |
3140 | table_owner->owner = stub_control.owner();; | |
a3e60ddb AM |
3141 | } |
3142 | for (typename std::vector<Stub_table_owner*>::iterator t = tables.begin(); | |
3143 | t != tables.end(); | |
3144 | ++t) | |
3145 | { | |
3146 | Stub_table<size, big_endian>* stub_table; | |
3147 | ||
3148 | if ((*t)->owner->is_input_section()) | |
3149 | stub_table = new Stub_table<size, big_endian>(this, | |
3150 | (*t)->output_section, | |
590b87ff AM |
3151 | (*t)->owner, |
3152 | this->stub_tables_.size()); | |
a3e60ddb AM |
3153 | else if ((*t)->owner->is_relaxed_input_section()) |
3154 | stub_table = static_cast<Stub_table<size, big_endian>*>( | |
3155 | (*t)->owner->relaxed_input_section()); | |
0cfdc767 | 3156 | else |
a3e60ddb AM |
3157 | gold_unreachable(); |
3158 | this->stub_tables_.push_back(stub_table); | |
3159 | delete *t; | |
0cfdc767 | 3160 | } |
ec661b9d AM |
3161 | } |
3162 | ||
a3e60ddb AM |
3163 | static unsigned long |
3164 | max_branch_delta (unsigned int r_type) | |
3165 | { | |
3166 | if (r_type == elfcpp::R_POWERPC_REL14 | |
3167 | || r_type == elfcpp::R_POWERPC_REL14_BRTAKEN | |
3168 | || r_type == elfcpp::R_POWERPC_REL14_BRNTAKEN) | |
3169 | return 1L << 15; | |
3170 | if (r_type == elfcpp::R_POWERPC_REL24 | |
3171 | || r_type == elfcpp::R_PPC_PLTREL24 | |
3172 | || r_type == elfcpp::R_PPC_LOCAL24PC) | |
3173 | return 1L << 25; | |
3174 | return 0; | |
3175 | } | |
3176 | ||
7e57d19e AM |
3177 | // Return whether this branch is going via a plt call stub. |
3178 | ||
3179 | template<int size, bool big_endian> | |
3180 | bool | |
3181 | Target_powerpc<size, big_endian>::Branch_info::mark_pltcall( | |
3182 | Powerpc_relobj<size, big_endian>* ppc_object, | |
3183 | unsigned int shndx, | |
3184 | Address offset, | |
3185 | Target_powerpc* target, | |
3186 | Symbol_table* symtab) | |
3187 | { | |
3188 | if (this->object_ != ppc_object | |
3189 | || this->shndx_ != shndx | |
3190 | || this->offset_ != offset) | |
3191 | return false; | |
3192 | ||
3193 | Symbol* sym = this->object_->global_symbol(this->r_sym_); | |
3194 | if (sym != NULL && sym->is_forwarder()) | |
3195 | sym = symtab->resolve_forwards(sym); | |
2778747c AM |
3196 | if (target->replace_tls_get_addr(sym)) |
3197 | sym = target->tls_get_addr_opt(); | |
7e57d19e AM |
3198 | const Sized_symbol<size>* gsym = static_cast<const Sized_symbol<size>*>(sym); |
3199 | if (gsym != NULL | |
7ee7ff70 AM |
3200 | ? (gsym->use_plt_offset(Scan::get_reference_flags(this->r_type_, target)) |
3201 | && !target->is_elfv2_localentry0(gsym)) | |
3202 | : (this->object_->local_has_plt_offset(this->r_sym_) | |
3203 | && !target->is_elfv2_localentry0(this->object_, this->r_sym_))) | |
7e57d19e AM |
3204 | { |
3205 | this->tocsave_ = 1; | |
3206 | return true; | |
3207 | } | |
3208 | return false; | |
3209 | } | |
3210 | ||
ec661b9d AM |
3211 | // If this branch needs a plt call stub, or a long branch stub, make one. |
3212 | ||
3213 | template<int size, bool big_endian> | |
a3e60ddb | 3214 | bool |
ec661b9d AM |
3215 | Target_powerpc<size, big_endian>::Branch_info::make_stub( |
3216 | Stub_table<size, big_endian>* stub_table, | |
3217 | Stub_table<size, big_endian>* ifunc_stub_table, | |
3218 | Symbol_table* symtab) const | |
3219 | { | |
3220 | Symbol* sym = this->object_->global_symbol(this->r_sym_); | |
88b8e639 AM |
3221 | Target_powerpc<size, big_endian>* target = |
3222 | static_cast<Target_powerpc<size, big_endian>*>( | |
3223 | parameters->sized_target<size, big_endian>()); | |
34e0882b AM |
3224 | if (sym != NULL && sym->is_forwarder()) |
3225 | sym = symtab->resolve_forwards(sym); | |
2778747c AM |
3226 | if (target->replace_tls_get_addr(sym)) |
3227 | sym = target->tls_get_addr_opt(); | |
34e0882b | 3228 | const Sized_symbol<size>* gsym = static_cast<const Sized_symbol<size>*>(sym); |
dc60b26d AM |
3229 | bool ok = true; |
3230 | ||
ec661b9d | 3231 | if (gsym != NULL |
88b8e639 | 3232 | ? gsym->use_plt_offset(Scan::get_reference_flags(this->r_type_, target)) |
ec661b9d AM |
3233 | : this->object_->local_has_plt_offset(this->r_sym_)) |
3234 | { | |
9055360d AM |
3235 | if (size == 64 |
3236 | && gsym != NULL | |
3237 | && target->abiversion() >= 2 | |
3238 | && !parameters->options().output_is_position_independent() | |
3239 | && !is_branch_reloc(this->r_type_)) | |
3240 | target->glink_section()->add_global_entry(gsym); | |
3241 | else | |
ec661b9d | 3242 | { |
64b5d6d7 AM |
3243 | if (stub_table == NULL |
3244 | && !(size == 32 | |
3245 | && gsym != NULL | |
3246 | && !parameters->options().output_is_position_independent() | |
3247 | && !is_branch_reloc(this->r_type_))) | |
9055360d AM |
3248 | stub_table = this->object_->stub_table(this->shndx_); |
3249 | if (stub_table == NULL) | |
3250 | { | |
64b5d6d7 AM |
3251 | // This is a ref from a data section to an ifunc symbol, |
3252 | // or a non-branch reloc for which we always want to use | |
3253 | // one set of stubs for resolving function addresses. | |
9055360d AM |
3254 | stub_table = ifunc_stub_table; |
3255 | } | |
3256 | gold_assert(stub_table != NULL); | |
a3e60ddb AM |
3257 | Address from = this->object_->get_output_section_offset(this->shndx_); |
3258 | if (from != invalid_address) | |
3259 | from += (this->object_->output_section(this->shndx_)->address() | |
3260 | + this->offset_); | |
9055360d | 3261 | if (gsym != NULL) |
dc60b26d AM |
3262 | ok = stub_table->add_plt_call_entry(from, |
3263 | this->object_, gsym, | |
7e57d19e AM |
3264 | this->r_type_, this->addend_, |
3265 | this->tocsave_); | |
9055360d | 3266 | else |
dc60b26d AM |
3267 | ok = stub_table->add_plt_call_entry(from, |
3268 | this->object_, this->r_sym_, | |
7e57d19e AM |
3269 | this->r_type_, this->addend_, |
3270 | this->tocsave_); | |
ec661b9d | 3271 | } |
ec661b9d AM |
3272 | } |
3273 | else | |
3274 | { | |
cbcb23fa | 3275 | Address max_branch_offset = max_branch_delta(this->r_type_); |
a3e60ddb AM |
3276 | if (max_branch_offset == 0) |
3277 | return true; | |
ec661b9d AM |
3278 | Address from = this->object_->get_output_section_offset(this->shndx_); |
3279 | gold_assert(from != invalid_address); | |
3280 | from += (this->object_->output_section(this->shndx_)->address() | |
3281 | + this->offset_); | |
3282 | Address to; | |
3283 | if (gsym != NULL) | |
3284 | { | |
3285 | switch (gsym->source()) | |
3286 | { | |
3287 | case Symbol::FROM_OBJECT: | |
3288 | { | |
3289 | Object* symobj = gsym->object(); | |
3290 | if (symobj->is_dynamic() | |
3291 | || symobj->pluginobj() != NULL) | |
a3e60ddb | 3292 | return true; |
ec661b9d AM |
3293 | bool is_ordinary; |
3294 | unsigned int shndx = gsym->shndx(&is_ordinary); | |
3295 | if (shndx == elfcpp::SHN_UNDEF) | |
a3e60ddb | 3296 | return true; |
ec661b9d AM |
3297 | } |
3298 | break; | |
3299 | ||
3300 | case Symbol::IS_UNDEFINED: | |
a3e60ddb | 3301 | return true; |
ec661b9d AM |
3302 | |
3303 | default: | |
3304 | break; | |
3305 | } | |
3306 | Symbol_table::Compute_final_value_status status; | |
3307 | to = symtab->compute_final_value<size>(gsym, &status); | |
3308 | if (status != Symbol_table::CFVS_OK) | |
a3e60ddb | 3309 | return true; |
9055360d AM |
3310 | if (size == 64) |
3311 | to += this->object_->ppc64_local_entry_offset(gsym); | |
ec661b9d AM |
3312 | } |
3313 | else | |
3314 | { | |
3315 | const Symbol_value<size>* psymval | |
3316 | = this->object_->local_symbol(this->r_sym_); | |
3317 | Symbol_value<size> symval; | |
0f125432 CC |
3318 | if (psymval->is_section_symbol()) |
3319 | symval.set_is_section_symbol(); | |
ec661b9d AM |
3320 | typedef Sized_relobj_file<size, big_endian> ObjType; |
3321 | typename ObjType::Compute_final_local_value_status status | |
3322 | = this->object_->compute_final_local_value(this->r_sym_, psymval, | |
3323 | &symval, symtab); | |
3324 | if (status != ObjType::CFLV_OK | |
3325 | || !symval.has_output_value()) | |
a3e60ddb | 3326 | return true; |
ec661b9d | 3327 | to = symval.value(this->object_, 0); |
9055360d AM |
3328 | if (size == 64) |
3329 | to += this->object_->ppc64_local_entry_offset(this->r_sym_); | |
ec661b9d | 3330 | } |
cbcb23fa AM |
3331 | if (!(size == 32 && this->r_type_ == elfcpp::R_PPC_PLTREL24)) |
3332 | to += this->addend_; | |
ec661b9d AM |
3333 | if (stub_table == NULL) |
3334 | stub_table = this->object_->stub_table(this->shndx_); | |
9055360d | 3335 | if (size == 64 && target->abiversion() < 2) |
ec661b9d AM |
3336 | { |
3337 | unsigned int dest_shndx; | |
1611bc4a AM |
3338 | if (!target->symval_for_branch(symtab, gsym, this->object_, |
3339 | &to, &dest_shndx)) | |
3340 | return true; | |
ec661b9d AM |
3341 | } |
3342 | Address delta = to - from; | |
3343 | if (delta + max_branch_offset >= 2 * max_branch_offset) | |
3344 | { | |
0cfdc767 AM |
3345 | if (stub_table == NULL) |
3346 | { | |
3347 | gold_warning(_("%s:%s: branch in non-executable section," | |
3348 | " no long branch stub for you"), | |
3349 | this->object_->name().c_str(), | |
3350 | this->object_->section_name(this->shndx_).c_str()); | |
a3e60ddb | 3351 | return true; |
0cfdc767 | 3352 | } |
d49044c7 AM |
3353 | bool save_res = (size == 64 |
3354 | && gsym != NULL | |
3355 | && gsym->source() == Symbol::IN_OUTPUT_DATA | |
3356 | && gsym->output_data() == target->savres_section()); | |
dc60b26d AM |
3357 | ok = stub_table->add_long_branch_entry(this->object_, |
3358 | this->r_type_, | |
3359 | from, to, save_res); | |
ec661b9d AM |
3360 | } |
3361 | } | |
dc60b26d AM |
3362 | if (!ok) |
3363 | gold_debug(DEBUG_TARGET, | |
3364 | "branch at %s:%s+%#lx\n" | |
3365 | "can't reach stub attached to %s:%s", | |
3366 | this->object_->name().c_str(), | |
3367 | this->object_->section_name(this->shndx_).c_str(), | |
3368 | (unsigned long) this->offset_, | |
3369 | stub_table->relobj()->name().c_str(), | |
3370 | stub_table->relobj()->section_name(stub_table->shndx()).c_str()); | |
3371 | ||
3372 | return ok; | |
ec661b9d AM |
3373 | } |
3374 | ||
3375 | // Relaxation hook. This is where we do stub generation. | |
3376 | ||
3377 | template<int size, bool big_endian> | |
3378 | bool | |
3379 | Target_powerpc<size, big_endian>::do_relax(int pass, | |
3380 | const Input_objects*, | |
3381 | Symbol_table* symtab, | |
3382 | Layout* layout, | |
3383 | const Task* task) | |
3384 | { | |
3385 | unsigned int prev_brlt_size = 0; | |
3386 | if (pass == 1) | |
ec661b9d | 3387 | { |
b4f7960d AM |
3388 | bool thread_safe |
3389 | = this->abiversion() < 2 && parameters->options().plt_thread_safe(); | |
3390 | if (size == 64 | |
3391 | && this->abiversion() < 2 | |
3392 | && !thread_safe | |
3393 | && !parameters->options().user_set_plt_thread_safe()) | |
ec661b9d | 3394 | { |
e2458743 | 3395 | static const char* const thread_starter[] = |
9e69ed50 AM |
3396 | { |
3397 | "pthread_create", | |
3398 | /* libstdc++ */ | |
3399 | "_ZNSt6thread15_M_start_threadESt10shared_ptrINS_10_Impl_baseEE", | |
3400 | /* librt */ | |
3401 | "aio_init", "aio_read", "aio_write", "aio_fsync", "lio_listio", | |
3402 | "mq_notify", "create_timer", | |
3403 | /* libanl */ | |
3404 | "getaddrinfo_a", | |
3405 | /* libgomp */ | |
80272b8c | 3406 | "GOMP_parallel", |
9e69ed50 | 3407 | "GOMP_parallel_start", |
80272b8c | 3408 | "GOMP_parallel_loop_static", |
9e69ed50 | 3409 | "GOMP_parallel_loop_static_start", |
80272b8c | 3410 | "GOMP_parallel_loop_dynamic", |
9e69ed50 | 3411 | "GOMP_parallel_loop_dynamic_start", |
80272b8c | 3412 | "GOMP_parallel_loop_guided", |
9e69ed50 | 3413 | "GOMP_parallel_loop_guided_start", |
80272b8c | 3414 | "GOMP_parallel_loop_runtime", |
9e69ed50 | 3415 | "GOMP_parallel_loop_runtime_start", |
80272b8c | 3416 | "GOMP_parallel_sections", |
43819297 | 3417 | "GOMP_parallel_sections_start", |
f9dffbf0 AM |
3418 | /* libgo */ |
3419 | "__go_go", | |
9e69ed50 AM |
3420 | }; |
3421 | ||
e2458743 AM |
3422 | if (parameters->options().shared()) |
3423 | thread_safe = true; | |
3424 | else | |
9e69ed50 | 3425 | { |
e2458743 AM |
3426 | for (unsigned int i = 0; |
3427 | i < sizeof(thread_starter) / sizeof(thread_starter[0]); | |
3428 | i++) | |
3429 | { | |
3430 | Symbol* sym = symtab->lookup(thread_starter[i], NULL); | |
3431 | thread_safe = (sym != NULL | |
3432 | && sym->in_reg() | |
3433 | && sym->in_real_elf()); | |
3434 | if (thread_safe) | |
3435 | break; | |
3436 | } | |
9e69ed50 | 3437 | } |
ec661b9d | 3438 | } |
9e69ed50 | 3439 | this->plt_thread_safe_ = thread_safe; |
a3e60ddb AM |
3440 | } |
3441 | ||
3442 | if (pass == 1) | |
3443 | { | |
3444 | this->stub_group_size_ = parameters->options().stub_group_size(); | |
3445 | bool no_size_errors = true; | |
3446 | if (this->stub_group_size_ == 1) | |
3447 | this->stub_group_size_ = 0x1c00000; | |
3448 | else if (this->stub_group_size_ == -1) | |
3449 | this->stub_group_size_ = -0x1e00000; | |
3450 | else | |
3451 | no_size_errors = false; | |
3452 | this->group_sections(layout, task, no_size_errors); | |
3453 | } | |
3454 | else if (this->relax_failed_ && this->relax_fail_count_ < 3) | |
3455 | { | |
3456 | this->branch_lookup_table_.clear(); | |
3457 | for (typename Stub_tables::iterator p = this->stub_tables_.begin(); | |
3458 | p != this->stub_tables_.end(); | |
3459 | ++p) | |
3460 | { | |
3461 | (*p)->clear_stubs(true); | |
3462 | } | |
3463 | this->stub_tables_.clear(); | |
3464 | this->stub_group_size_ = this->stub_group_size_ / 4 * 3; | |
57f6d32d | 3465 | gold_info(_("%s: stub group size is too large; retrying with %#x"), |
a3e60ddb AM |
3466 | program_name, this->stub_group_size_); |
3467 | this->group_sections(layout, task, true); | |
ec661b9d AM |
3468 | } |
3469 | ||
3470 | // We need address of stub tables valid for make_stub. | |
3471 | for (typename Stub_tables::iterator p = this->stub_tables_.begin(); | |
3472 | p != this->stub_tables_.end(); | |
3473 | ++p) | |
3474 | { | |
3475 | const Powerpc_relobj<size, big_endian>* object | |
3476 | = static_cast<const Powerpc_relobj<size, big_endian>*>((*p)->relobj()); | |
3477 | Address off = object->get_output_section_offset((*p)->shndx()); | |
3478 | gold_assert(off != invalid_address); | |
3479 | Output_section* os = (*p)->output_section(); | |
3480 | (*p)->set_address_and_size(os, off); | |
3481 | } | |
3482 | ||
9e69ed50 AM |
3483 | if (pass != 1) |
3484 | { | |
3485 | // Clear plt call stubs, long branch stubs and branch lookup table. | |
3486 | prev_brlt_size = this->branch_lookup_table_.size(); | |
3487 | this->branch_lookup_table_.clear(); | |
3488 | for (typename Stub_tables::iterator p = this->stub_tables_.begin(); | |
3489 | p != this->stub_tables_.end(); | |
3490 | ++p) | |
3491 | { | |
a3e60ddb | 3492 | (*p)->clear_stubs(false); |
9e69ed50 AM |
3493 | } |
3494 | } | |
3495 | ||
3496 | // Build all the stubs. | |
a3e60ddb | 3497 | this->relax_failed_ = false; |
ec661b9d AM |
3498 | Stub_table<size, big_endian>* ifunc_stub_table |
3499 | = this->stub_tables_.size() == 0 ? NULL : this->stub_tables_[0]; | |
3500 | Stub_table<size, big_endian>* one_stub_table | |
3501 | = this->stub_tables_.size() != 1 ? NULL : ifunc_stub_table; | |
3502 | for (typename Branches::const_iterator b = this->branch_info_.begin(); | |
3503 | b != this->branch_info_.end(); | |
3504 | b++) | |
3505 | { | |
a3e60ddb AM |
3506 | if (!b->make_stub(one_stub_table, ifunc_stub_table, symtab) |
3507 | && !this->relax_failed_) | |
3508 | { | |
3509 | this->relax_failed_ = true; | |
3510 | this->relax_fail_count_++; | |
3511 | if (this->relax_fail_count_ < 3) | |
3512 | return true; | |
3513 | } | |
ec661b9d AM |
3514 | } |
3515 | ||
9e69ed50 | 3516 | // Did anything change size? |
ec661b9d AM |
3517 | unsigned int num_huge_branches = this->branch_lookup_table_.size(); |
3518 | bool again = num_huge_branches != prev_brlt_size; | |
3519 | if (size == 64 && num_huge_branches != 0) | |
3520 | this->make_brlt_section(layout); | |
3521 | if (size == 64 && again) | |
3522 | this->brlt_section_->set_current_size(num_huge_branches); | |
3523 | ||
be897fb7 AM |
3524 | for (typename Stub_tables::reverse_iterator p = this->stub_tables_.rbegin(); |
3525 | p != this->stub_tables_.rend(); | |
3526 | ++p) | |
3527 | (*p)->remove_eh_frame(layout); | |
3528 | ||
3529 | for (typename Stub_tables::iterator p = this->stub_tables_.begin(); | |
3530 | p != this->stub_tables_.end(); | |
3531 | ++p) | |
3532 | (*p)->add_eh_frame(layout); | |
3533 | ||
ec661b9d AM |
3534 | typedef Unordered_set<Output_section*> Output_sections; |
3535 | Output_sections os_need_update; | |
3536 | for (typename Stub_tables::iterator p = this->stub_tables_.begin(); | |
3537 | p != this->stub_tables_.end(); | |
3538 | ++p) | |
3539 | { | |
3540 | if ((*p)->size_update()) | |
3541 | { | |
3542 | again = true; | |
3543 | os_need_update.insert((*p)->output_section()); | |
3544 | } | |
3545 | } | |
3546 | ||
9e69ed50 AM |
3547 | // Set output section offsets for all input sections in an output |
3548 | // section that just changed size. Anything past the stubs will | |
3549 | // need updating. | |
ec661b9d AM |
3550 | for (typename Output_sections::iterator p = os_need_update.begin(); |
3551 | p != os_need_update.end(); | |
3552 | p++) | |
3553 | { | |
3554 | Output_section* os = *p; | |
3555 | Address off = 0; | |
3556 | typedef Output_section::Input_section_list Input_section_list; | |
3557 | for (Input_section_list::const_iterator i = os->input_sections().begin(); | |
3558 | i != os->input_sections().end(); | |
3559 | ++i) | |
3560 | { | |
3561 | off = align_address(off, i->addralign()); | |
3562 | if (i->is_input_section() || i->is_relaxed_input_section()) | |
3563 | i->relobj()->set_section_offset(i->shndx(), off); | |
3564 | if (i->is_relaxed_input_section()) | |
3565 | { | |
3566 | Stub_table<size, big_endian>* stub_table | |
3567 | = static_cast<Stub_table<size, big_endian>*>( | |
3568 | i->relaxed_input_section()); | |
6395d38b HS |
3569 | Address stub_table_size = stub_table->set_address_and_size(os, off); |
3570 | off += stub_table_size; | |
3571 | // After a few iterations, set current stub table size | |
3572 | // as min size threshold, so later stub tables can only | |
3573 | // grow in size. | |
3574 | if (pass >= 4) | |
3575 | stub_table->set_min_size_threshold(stub_table_size); | |
ec661b9d AM |
3576 | } |
3577 | else | |
3578 | off += i->data_size(); | |
3579 | } | |
6830ee24 AM |
3580 | // If .branch_lt is part of this output section, then we have |
3581 | // just done the offset adjustment. | |
ec661b9d AM |
3582 | os->clear_section_offsets_need_adjustment(); |
3583 | } | |
3584 | ||
3585 | if (size == 64 | |
3586 | && !again | |
3587 | && num_huge_branches != 0 | |
3588 | && parameters->options().output_is_position_independent()) | |
3589 | { | |
3590 | // Fill in the BRLT relocs. | |
06f30c9d | 3591 | this->brlt_section_->reset_brlt_sizes(); |
ec661b9d AM |
3592 | for (typename Branch_lookup_table::const_iterator p |
3593 | = this->branch_lookup_table_.begin(); | |
3594 | p != this->branch_lookup_table_.end(); | |
3595 | ++p) | |
3596 | { | |
3597 | this->brlt_section_->add_reloc(p->first, p->second); | |
3598 | } | |
06f30c9d | 3599 | this->brlt_section_->finalize_brlt_sizes(); |
ec661b9d | 3600 | } |
590b87ff AM |
3601 | |
3602 | if (!again | |
3603 | && (parameters->options().user_set_emit_stub_syms() | |
3604 | ? parameters->options().emit_stub_syms() | |
3605 | : (size == 64 | |
3606 | || parameters->options().output_is_position_independent() | |
3607 | || parameters->options().emit_relocs()))) | |
3608 | { | |
3609 | for (typename Stub_tables::iterator p = this->stub_tables_.begin(); | |
3610 | p != this->stub_tables_.end(); | |
3611 | ++p) | |
3612 | (*p)->define_stub_syms(symtab); | |
3613 | ||
3614 | if (this->glink_ != NULL) | |
3615 | { | |
9e390558 | 3616 | int stub_size = this->glink_->pltresolve_size(); |
590b87ff AM |
3617 | Address value = -stub_size; |
3618 | if (size == 64) | |
3619 | { | |
3620 | value = 8; | |
3621 | stub_size -= 8; | |
3622 | } | |
3623 | this->define_local(symtab, "__glink_PLTresolve", | |
3624 | this->glink_, value, stub_size); | |
3625 | ||
3626 | if (size != 64) | |
3627 | this->define_local(symtab, "__glink", this->glink_, 0, 0); | |
3628 | } | |
3629 | } | |
3630 | ||
ec661b9d AM |
3631 | return again; |
3632 | } | |
3633 | ||
9d5781f8 AM |
3634 | template<int size, bool big_endian> |
3635 | void | |
3636 | Target_powerpc<size, big_endian>::do_plt_fde_location(const Output_data* plt, | |
3637 | unsigned char* oview, | |
3638 | uint64_t* paddress, | |
3639 | off_t* plen) const | |
3640 | { | |
3641 | uint64_t address = plt->address(); | |
3642 | off_t len = plt->data_size(); | |
3643 | ||
3644 | if (plt == this->glink_) | |
3645 | { | |
3646 | // See Output_data_glink::do_write() for glink contents. | |
5fe7ffdc AM |
3647 | if (len == 0) |
3648 | { | |
3649 | gold_assert(parameters->doing_static_link()); | |
3650 | // Static linking may need stubs, to support ifunc and long | |
3651 | // branches. We need to create an output section for | |
3652 | // .eh_frame early in the link process, to have a place to | |
3653 | // attach stub .eh_frame info. We also need to have | |
3654 | // registered a CIE that matches the stub CIE. Both of | |
3655 | // these requirements are satisfied by creating an FDE and | |
3656 | // CIE for .glink, even though static linking will leave | |
3657 | // .glink zero length. | |
3658 | // ??? Hopefully generating an FDE with a zero address range | |
3659 | // won't confuse anything that consumes .eh_frame info. | |
3660 | } | |
3661 | else if (size == 64) | |
9d5781f8 AM |
3662 | { |
3663 | // There is one word before __glink_PLTresolve | |
3664 | address += 8; | |
3665 | len -= 8; | |
3666 | } | |
3667 | else if (parameters->options().output_is_position_independent()) | |
3668 | { | |
3669 | // There are two FDEs for a position independent glink. | |
3670 | // The first covers the branch table, the second | |
3671 | // __glink_PLTresolve at the end of glink. | |
9e390558 | 3672 | off_t resolve_size = this->glink_->pltresolve_size(); |
5fe7ffdc | 3673 | if (oview[9] == elfcpp::DW_CFA_nop) |
9d5781f8 AM |
3674 | len -= resolve_size; |
3675 | else | |
3676 | { | |
3677 | address += len - resolve_size; | |
3678 | len = resolve_size; | |
3679 | } | |
3680 | } | |
3681 | } | |
3682 | else | |
3683 | { | |
3684 | // Must be a stub table. | |
3685 | const Stub_table<size, big_endian>* stub_table | |
3686 | = static_cast<const Stub_table<size, big_endian>*>(plt); | |
3687 | uint64_t stub_address = stub_table->stub_address(); | |
3688 | len -= stub_address - address; | |
3689 | address = stub_address; | |
3690 | } | |
3691 | ||
3692 | *paddress = address; | |
3693 | *plen = len; | |
3694 | } | |
3695 | ||
42cacb20 DE |
3696 | // A class to handle the PLT data. |
3697 | ||
3698 | template<int size, bool big_endian> | |
cf43a2fe | 3699 | class Output_data_plt_powerpc : public Output_section_data_build |
42cacb20 DE |
3700 | { |
3701 | public: | |
3702 | typedef Output_data_reloc<elfcpp::SHT_RELA, true, | |
3703 | size, big_endian> Reloc_section; | |
3704 | ||
e5d5f5ed AM |
3705 | Output_data_plt_powerpc(Target_powerpc<size, big_endian>* targ, |
3706 | Reloc_section* plt_rel, | |
e5d5f5ed AM |
3707 | const char* name) |
3708 | : Output_section_data_build(size == 32 ? 4 : 8), | |
3709 | rel_(plt_rel), | |
3710 | targ_(targ), | |
e5d5f5ed AM |
3711 | name_(name) |
3712 | { } | |
42cacb20 DE |
3713 | |
3714 | // Add an entry to the PLT. | |
03e25981 | 3715 | void |
cf43a2fe | 3716 | add_entry(Symbol*); |
42cacb20 | 3717 | |
03e25981 | 3718 | void |
e5d5f5ed AM |
3719 | add_ifunc_entry(Symbol*); |
3720 | ||
2d7ad24e AM |
3721 | void |
3722 | add_local_entry(Sized_relobj_file<size, big_endian>*, unsigned int); | |
3723 | ||
03e25981 | 3724 | void |
e5d5f5ed AM |
3725 | add_local_ifunc_entry(Sized_relobj_file<size, big_endian>*, unsigned int); |
3726 | ||
42cacb20 | 3727 | // Return the .rela.plt section data. |
e5d5f5ed | 3728 | Reloc_section* |
cf43a2fe AM |
3729 | rel_plt() const |
3730 | { | |
42cacb20 DE |
3731 | return this->rel_; |
3732 | } | |
3733 | ||
0e70b911 CC |
3734 | // Return the number of PLT entries. |
3735 | unsigned int | |
3736 | entry_count() const | |
d83ce4e3 | 3737 | { |
b3ccdeb5 AM |
3738 | if (this->current_data_size() == 0) |
3739 | return 0; | |
b4f7960d AM |
3740 | return ((this->current_data_size() - this->first_plt_entry_offset()) |
3741 | / this->plt_entry_size()); | |
d83ce4e3 | 3742 | } |
0e70b911 | 3743 | |
42cacb20 | 3744 | protected: |
42cacb20 | 3745 | void |
cf43a2fe | 3746 | do_adjust_output_section(Output_section* os) |
42cacb20 | 3747 | { |
cf43a2fe | 3748 | os->set_entsize(0); |
42cacb20 DE |
3749 | } |
3750 | ||
6ce78956 AM |
3751 | // Write to a map file. |
3752 | void | |
3753 | do_print_to_mapfile(Mapfile* mapfile) const | |
e5d5f5ed | 3754 | { mapfile->print_output_data(this, this->name_); } |
6ce78956 | 3755 | |
cf43a2fe | 3756 | private: |
b4f7960d AM |
3757 | // Return the offset of the first non-reserved PLT entry. |
3758 | unsigned int | |
3759 | first_plt_entry_offset() const | |
3760 | { | |
2d7ad24e AM |
3761 | // IPLT and LPLT have no reserved entry. |
3762 | if (this->name_[3] == 'I' || this->name_[3] == 'L') | |
b4f7960d AM |
3763 | return 0; |
3764 | return this->targ_->first_plt_entry_offset(); | |
3765 | } | |
3766 | ||
3767 | // Return the size of each PLT entry. | |
3768 | unsigned int | |
3769 | plt_entry_size() const | |
3770 | { | |
3771 | return this->targ_->plt_entry_size(); | |
3772 | } | |
cf43a2fe | 3773 | |
42cacb20 DE |
3774 | // Write out the PLT data. |
3775 | void | |
3776 | do_write(Output_file*); | |
3777 | ||
3778 | // The reloc section. | |
3779 | Reloc_section* rel_; | |
cf43a2fe AM |
3780 | // Allows access to .glink for do_write. |
3781 | Target_powerpc<size, big_endian>* targ_; | |
e5d5f5ed AM |
3782 | // What to report in map file. |
3783 | const char *name_; | |
42cacb20 DE |
3784 | }; |
3785 | ||
e5d5f5ed | 3786 | // Add an entry to the PLT. |
42cacb20 DE |
3787 | |
3788 | template<int size, bool big_endian> | |
03e25981 | 3789 | void |
e5d5f5ed | 3790 | Output_data_plt_powerpc<size, big_endian>::add_entry(Symbol* gsym) |
42cacb20 | 3791 | { |
e5d5f5ed AM |
3792 | if (!gsym->has_plt_offset()) |
3793 | { | |
ec661b9d | 3794 | section_size_type off = this->current_data_size(); |
e5d5f5ed AM |
3795 | if (off == 0) |
3796 | off += this->first_plt_entry_offset(); | |
3797 | gsym->set_plt_offset(off); | |
3798 | gsym->set_needs_dynsym_entry(); | |
3799 | unsigned int dynrel = elfcpp::R_POWERPC_JMP_SLOT; | |
3800 | this->rel_->add_global(gsym, dynrel, this, off, 0); | |
b4f7960d | 3801 | off += this->plt_entry_size(); |
e5d5f5ed AM |
3802 | this->set_current_data_size(off); |
3803 | } | |
42cacb20 DE |
3804 | } |
3805 | ||
e5d5f5ed | 3806 | // Add an entry for a global ifunc symbol that resolves locally, to the IPLT. |
42cacb20 DE |
3807 | |
3808 | template<int size, bool big_endian> | |
03e25981 | 3809 | void |
e5d5f5ed | 3810 | Output_data_plt_powerpc<size, big_endian>::add_ifunc_entry(Symbol* gsym) |
42cacb20 | 3811 | { |
cf43a2fe AM |
3812 | if (!gsym->has_plt_offset()) |
3813 | { | |
ec661b9d | 3814 | section_size_type off = this->current_data_size(); |
cf43a2fe | 3815 | gsym->set_plt_offset(off); |
e5d5f5ed | 3816 | unsigned int dynrel = elfcpp::R_POWERPC_IRELATIVE; |
b4f7960d | 3817 | if (size == 64 && this->targ_->abiversion() < 2) |
e5d5f5ed AM |
3818 | dynrel = elfcpp::R_PPC64_JMP_IREL; |
3819 | this->rel_->add_symbolless_global_addend(gsym, dynrel, this, off, 0); | |
b4f7960d | 3820 | off += this->plt_entry_size(); |
e5d5f5ed AM |
3821 | this->set_current_data_size(off); |
3822 | } | |
3823 | } | |
3824 | ||
2d7ad24e AM |
3825 | // Add an entry for a local symbol to the PLT. |
3826 | ||
3827 | template<int size, bool big_endian> | |
3828 | void | |
3829 | Output_data_plt_powerpc<size, big_endian>::add_local_entry( | |
3830 | Sized_relobj_file<size, big_endian>* relobj, | |
3831 | unsigned int local_sym_index) | |
3832 | { | |
3833 | if (!relobj->local_has_plt_offset(local_sym_index)) | |
3834 | { | |
3835 | section_size_type off = this->current_data_size(); | |
3836 | relobj->set_local_plt_offset(local_sym_index, off); | |
3837 | if (this->rel_) | |
3838 | { | |
3839 | unsigned int dynrel = elfcpp::R_POWERPC_RELATIVE; | |
3840 | if (size == 64 && this->targ_->abiversion() < 2) | |
3841 | dynrel = elfcpp::R_POWERPC_JMP_SLOT; | |
3842 | this->rel_->add_symbolless_local_addend(relobj, local_sym_index, | |
3843 | dynrel, this, off, 0); | |
3844 | } | |
3845 | off += this->plt_entry_size(); | |
3846 | this->set_current_data_size(off); | |
3847 | } | |
3848 | } | |
3849 | ||
e5d5f5ed AM |
3850 | // Add an entry for a local ifunc symbol to the IPLT. |
3851 | ||
3852 | template<int size, bool big_endian> | |
03e25981 | 3853 | void |
e5d5f5ed AM |
3854 | Output_data_plt_powerpc<size, big_endian>::add_local_ifunc_entry( |
3855 | Sized_relobj_file<size, big_endian>* relobj, | |
3856 | unsigned int local_sym_index) | |
3857 | { | |
3858 | if (!relobj->local_has_plt_offset(local_sym_index)) | |
3859 | { | |
ec661b9d | 3860 | section_size_type off = this->current_data_size(); |
e5d5f5ed AM |
3861 | relobj->set_local_plt_offset(local_sym_index, off); |
3862 | unsigned int dynrel = elfcpp::R_POWERPC_IRELATIVE; | |
b4f7960d | 3863 | if (size == 64 && this->targ_->abiversion() < 2) |
e5d5f5ed AM |
3864 | dynrel = elfcpp::R_PPC64_JMP_IREL; |
3865 | this->rel_->add_symbolless_local_addend(relobj, local_sym_index, dynrel, | |
3866 | this, off, 0); | |
b4f7960d | 3867 | off += this->plt_entry_size(); |
cf43a2fe AM |
3868 | this->set_current_data_size(off); |
3869 | } | |
42cacb20 DE |
3870 | } |
3871 | ||
dd93cd0a | 3872 | static const uint32_t add_0_11_11 = 0x7c0b5a14; |
9e69ed50 | 3873 | static const uint32_t add_2_2_11 = 0x7c425a14; |
549dba71 | 3874 | static const uint32_t add_2_2_12 = 0x7c426214; |
dd93cd0a AM |
3875 | static const uint32_t add_3_3_2 = 0x7c631214; |
3876 | static const uint32_t add_3_3_13 = 0x7c636a14; | |
34e0882b AM |
3877 | static const uint32_t add_3_12_2 = 0x7c6c1214; |
3878 | static const uint32_t add_3_12_13 = 0x7c6c6a14; | |
dd93cd0a | 3879 | static const uint32_t add_11_0_11 = 0x7d605a14; |
b4f7960d AM |
3880 | static const uint32_t add_11_2_11 = 0x7d625a14; |
3881 | static const uint32_t add_11_11_2 = 0x7d6b1214; | |
3882 | static const uint32_t addi_0_12 = 0x380c0000; | |
dd93cd0a | 3883 | static const uint32_t addi_2_2 = 0x38420000; |
dd93cd0a | 3884 | static const uint32_t addi_3_3 = 0x38630000; |
b4f7960d | 3885 | static const uint32_t addi_11_11 = 0x396b0000; |
bbec1a5d | 3886 | static const uint32_t addi_12_1 = 0x39810000; |
b4f7960d | 3887 | static const uint32_t addi_12_12 = 0x398c0000; |
dd93cd0a AM |
3888 | static const uint32_t addis_0_2 = 0x3c020000; |
3889 | static const uint32_t addis_0_13 = 0x3c0d0000; | |
bbec1a5d | 3890 | static const uint32_t addis_2_12 = 0x3c4c0000; |
b4f7960d | 3891 | static const uint32_t addis_11_2 = 0x3d620000; |
c9269dff AM |
3892 | static const uint32_t addis_11_11 = 0x3d6b0000; |
3893 | static const uint32_t addis_11_30 = 0x3d7e0000; | |
bbec1a5d | 3894 | static const uint32_t addis_12_1 = 0x3d810000; |
397998fc | 3895 | static const uint32_t addis_12_2 = 0x3d820000; |
c9269dff | 3896 | static const uint32_t addis_12_12 = 0x3d8c0000; |
c9269dff AM |
3897 | static const uint32_t b = 0x48000000; |
3898 | static const uint32_t bcl_20_31 = 0x429f0005; | |
3899 | static const uint32_t bctr = 0x4e800420; | |
34e0882b AM |
3900 | static const uint32_t bctrl = 0x4e800421; |
3901 | static const uint32_t beqlr = 0x4d820020; | |
f3a0ed29 | 3902 | static const uint32_t blr = 0x4e800020; |
9e69ed50 | 3903 | static const uint32_t bnectr_p4 = 0x4ce20420; |
bbec1a5d | 3904 | static const uint32_t cmpld_7_12_0 = 0x7fac0040; |
9e69ed50 | 3905 | static const uint32_t cmpldi_2_0 = 0x28220000; |
34e0882b AM |
3906 | static const uint32_t cmpdi_11_0 = 0x2c2b0000; |
3907 | static const uint32_t cmpwi_11_0 = 0x2c0b0000; | |
dd93cd0a AM |
3908 | static const uint32_t cror_15_15_15 = 0x4def7b82; |
3909 | static const uint32_t cror_31_31_31 = 0x4ffffb82; | |
f3a0ed29 AM |
3910 | static const uint32_t ld_0_1 = 0xe8010000; |
3911 | static const uint32_t ld_0_12 = 0xe80c0000; | |
dd93cd0a | 3912 | static const uint32_t ld_2_1 = 0xe8410000; |
dd93cd0a | 3913 | static const uint32_t ld_2_2 = 0xe8420000; |
b4f7960d | 3914 | static const uint32_t ld_2_11 = 0xe84b0000; |
549dba71 | 3915 | static const uint32_t ld_2_12 = 0xe84c0000; |
34e0882b | 3916 | static const uint32_t ld_11_1 = 0xe9610000; |
b4f7960d | 3917 | static const uint32_t ld_11_2 = 0xe9620000; |
34e0882b | 3918 | static const uint32_t ld_11_3 = 0xe9630000; |
b4f7960d AM |
3919 | static const uint32_t ld_11_11 = 0xe96b0000; |
3920 | static const uint32_t ld_12_2 = 0xe9820000; | |
34e0882b | 3921 | static const uint32_t ld_12_3 = 0xe9830000; |
b4f7960d | 3922 | static const uint32_t ld_12_11 = 0xe98b0000; |
9055360d | 3923 | static const uint32_t ld_12_12 = 0xe98c0000; |
f3a0ed29 | 3924 | static const uint32_t lfd_0_1 = 0xc8010000; |
dd93cd0a | 3925 | static const uint32_t li_0_0 = 0x38000000; |
f3a0ed29 | 3926 | static const uint32_t li_12_0 = 0x39800000; |
bbec1a5d | 3927 | static const uint32_t lis_0 = 0x3c000000; |
549dba71 | 3928 | static const uint32_t lis_2 = 0x3c400000; |
c9269dff AM |
3929 | static const uint32_t lis_11 = 0x3d600000; |
3930 | static const uint32_t lis_12 = 0x3d800000; | |
b4f7960d | 3931 | static const uint32_t lvx_0_12_0 = 0x7c0c00ce; |
c9269dff | 3932 | static const uint32_t lwz_0_12 = 0x800c0000; |
34e0882b | 3933 | static const uint32_t lwz_11_3 = 0x81630000; |
c9269dff AM |
3934 | static const uint32_t lwz_11_11 = 0x816b0000; |
3935 | static const uint32_t lwz_11_30 = 0x817e0000; | |
34e0882b | 3936 | static const uint32_t lwz_12_3 = 0x81830000; |
c9269dff | 3937 | static const uint32_t lwz_12_12 = 0x818c0000; |
dd93cd0a | 3938 | static const uint32_t lwzu_0_12 = 0x840c0000; |
c9269dff | 3939 | static const uint32_t mflr_0 = 0x7c0802a6; |
dd93cd0a | 3940 | static const uint32_t mflr_11 = 0x7d6802a6; |
c9269dff | 3941 | static const uint32_t mflr_12 = 0x7d8802a6; |
34e0882b AM |
3942 | static const uint32_t mr_0_3 = 0x7c601b78; |
3943 | static const uint32_t mr_3_0 = 0x7c030378; | |
c9269dff AM |
3944 | static const uint32_t mtctr_0 = 0x7c0903a6; |
3945 | static const uint32_t mtctr_11 = 0x7d6903a6; | |
ec661b9d | 3946 | static const uint32_t mtctr_12 = 0x7d8903a6; |
c9269dff | 3947 | static const uint32_t mtlr_0 = 0x7c0803a6; |
34e0882b | 3948 | static const uint32_t mtlr_11 = 0x7d6803a6; |
c9269dff | 3949 | static const uint32_t mtlr_12 = 0x7d8803a6; |
dd93cd0a | 3950 | static const uint32_t nop = 0x60000000; |
c9269dff | 3951 | static const uint32_t ori_0_0_0 = 0x60000000; |
b4f7960d | 3952 | static const uint32_t srdi_0_0_2 = 0x7800f082; |
f3a0ed29 AM |
3953 | static const uint32_t std_0_1 = 0xf8010000; |
3954 | static const uint32_t std_0_12 = 0xf80c0000; | |
dd93cd0a | 3955 | static const uint32_t std_2_1 = 0xf8410000; |
34e0882b | 3956 | static const uint32_t std_11_1 = 0xf9610000; |
f3a0ed29 AM |
3957 | static const uint32_t stfd_0_1 = 0xd8010000; |
3958 | static const uint32_t stvx_0_12_0 = 0x7c0c01ce; | |
dd93cd0a | 3959 | static const uint32_t sub_11_11_12 = 0x7d6c5850; |
b4f7960d AM |
3960 | static const uint32_t sub_12_12_11 = 0x7d8b6050; |
3961 | static const uint32_t xor_2_12_12 = 0x7d826278; | |
3962 | static const uint32_t xor_11_12_12 = 0x7d8b6278; | |
42cacb20 DE |
3963 | |
3964 | // Write out the PLT. | |
3965 | ||
3966 | template<int size, bool big_endian> | |
3967 | void | |
3968 | Output_data_plt_powerpc<size, big_endian>::do_write(Output_file* of) | |
3969 | { | |
2d7ad24e | 3970 | if (size == 32 && (this->name_[3] != 'I' && this->name_[3] != 'L')) |
cf43a2fe | 3971 | { |
ec661b9d | 3972 | const section_size_type offset = this->offset(); |
cf43a2fe AM |
3973 | const section_size_type oview_size |
3974 | = convert_to_section_size_type(this->data_size()); | |
3975 | unsigned char* const oview = of->get_output_view(offset, oview_size); | |
3976 | unsigned char* pov = oview; | |
3977 | unsigned char* endpov = oview + oview_size; | |
3978 | ||
e5d5f5ed | 3979 | // The address of the .glink branch table |
cf43a2fe AM |
3980 | const Output_data_glink<size, big_endian>* glink |
3981 | = this->targ_->glink_section(); | |
ec661b9d | 3982 | elfcpp::Elf_types<32>::Elf_Addr branch_tab = glink->address(); |
cf43a2fe AM |
3983 | |
3984 | while (pov < endpov) | |
3985 | { | |
3986 | elfcpp::Swap<32, big_endian>::writeval(pov, branch_tab); | |
3987 | pov += 4; | |
3988 | branch_tab += 4; | |
3989 | } | |
3990 | ||
3991 | of->write_output_view(offset, oview_size, oview); | |
3992 | } | |
3993 | } | |
3994 | ||
3995 | // Create the PLT section. | |
3996 | ||
3997 | template<int size, bool big_endian> | |
3998 | void | |
40b469d7 AM |
3999 | Target_powerpc<size, big_endian>::make_plt_section(Symbol_table* symtab, |
4000 | Layout* layout) | |
cf43a2fe AM |
4001 | { |
4002 | if (this->plt_ == NULL) | |
4003 | { | |
40b469d7 AM |
4004 | if (this->got_ == NULL) |
4005 | this->got_section(symtab, layout); | |
4006 | ||
cf43a2fe AM |
4007 | if (this->glink_ == NULL) |
4008 | make_glink_section(layout); | |
4009 | ||
4010 | // Ensure that .rela.dyn always appears before .rela.plt This is | |
4011 | // necessary due to how, on PowerPC and some other targets, .rela.dyn | |
b3ccdeb5 | 4012 | // needs to include .rela.plt in its range. |
cf43a2fe AM |
4013 | this->rela_dyn_section(layout); |
4014 | ||
e5d5f5ed AM |
4015 | Reloc_section* plt_rel = new Reloc_section(false); |
4016 | layout->add_output_section_data(".rela.plt", elfcpp::SHT_RELA, | |
4017 | elfcpp::SHF_ALLOC, plt_rel, | |
4018 | ORDER_DYNAMIC_PLT_RELOCS, false); | |
4019 | this->plt_ | |
4020 | = new Output_data_plt_powerpc<size, big_endian>(this, plt_rel, | |
e5d5f5ed | 4021 | "** PLT"); |
cf43a2fe AM |
4022 | layout->add_output_section_data(".plt", |
4023 | (size == 32 | |
4024 | ? elfcpp::SHT_PROGBITS | |
4025 | : elfcpp::SHT_NOBITS), | |
4026 | elfcpp::SHF_ALLOC | elfcpp::SHF_WRITE, | |
4027 | this->plt_, | |
4028 | (size == 32 | |
4029 | ? ORDER_SMALL_DATA | |
4030 | : ORDER_SMALL_BSS), | |
4031 | false); | |
3254d32c AM |
4032 | |
4033 | Output_section* rela_plt_os = plt_rel->output_section(); | |
4034 | rela_plt_os->set_info_section(this->plt_->output_section()); | |
cf43a2fe AM |
4035 | } |
4036 | } | |
4037 | ||
e5d5f5ed AM |
4038 | // Create the IPLT section. |
4039 | ||
4040 | template<int size, bool big_endian> | |
4041 | void | |
40b469d7 AM |
4042 | Target_powerpc<size, big_endian>::make_iplt_section(Symbol_table* symtab, |
4043 | Layout* layout) | |
e5d5f5ed AM |
4044 | { |
4045 | if (this->iplt_ == NULL) | |
4046 | { | |
40b469d7 | 4047 | this->make_plt_section(symtab, layout); |
2d7ad24e | 4048 | this->make_lplt_section(layout); |
e5d5f5ed AM |
4049 | |
4050 | Reloc_section* iplt_rel = new Reloc_section(false); | |
6528b6eb AM |
4051 | if (this->rela_dyn_->output_section()) |
4052 | this->rela_dyn_->output_section()->add_output_section_data(iplt_rel); | |
e5d5f5ed AM |
4053 | this->iplt_ |
4054 | = new Output_data_plt_powerpc<size, big_endian>(this, iplt_rel, | |
b4f7960d | 4055 | "** IPLT"); |
6528b6eb AM |
4056 | if (this->plt_->output_section()) |
4057 | this->plt_->output_section()->add_output_section_data(this->iplt_); | |
e5d5f5ed AM |
4058 | } |
4059 | } | |
4060 | ||
2d7ad24e AM |
4061 | // Create the LPLT section. |
4062 | ||
4063 | template<int size, bool big_endian> | |
4064 | void | |
4065 | Target_powerpc<size, big_endian>::make_lplt_section(Layout* layout) | |
4066 | { | |
4067 | if (this->lplt_ == NULL) | |
4068 | { | |
4069 | Reloc_section* lplt_rel = NULL; | |
4070 | if (parameters->options().output_is_position_independent()) | |
4071 | { | |
4072 | lplt_rel = new Reloc_section(false); | |
4073 | this->rela_dyn_section(layout); | |
4074 | if (this->rela_dyn_->output_section()) | |
4075 | this->rela_dyn_->output_section() | |
4076 | ->add_output_section_data(lplt_rel); | |
4077 | } | |
4078 | this->lplt_ | |
4079 | = new Output_data_plt_powerpc<size, big_endian>(this, lplt_rel, | |
4080 | "** LPLT"); | |
4081 | this->make_brlt_section(layout); | |
4082 | if (this->brlt_section_ && this->brlt_section_->output_section()) | |
4083 | this->brlt_section_->output_section() | |
4084 | ->add_output_section_data(this->lplt_); | |
4085 | else | |
4086 | layout->add_output_section_data(".branch_lt", | |
4087 | elfcpp::SHT_PROGBITS, | |
4088 | elfcpp::SHF_ALLOC | elfcpp::SHF_WRITE, | |
4089 | this->lplt_, | |
4090 | ORDER_RELRO, | |
4091 | true); | |
4092 | } | |
4093 | } | |
4094 | ||
ec661b9d | 4095 | // A section for huge long branch addresses, similar to plt section. |
cf43a2fe AM |
4096 | |
4097 | template<int size, bool big_endian> | |
ec661b9d | 4098 | class Output_data_brlt_powerpc : public Output_section_data_build |
cf43a2fe AM |
4099 | { |
4100 | public: | |
ec661b9d AM |
4101 | typedef typename elfcpp::Elf_types<size>::Elf_Addr Address; |
4102 | typedef Output_data_reloc<elfcpp::SHT_RELA, true, | |
4103 | size, big_endian> Reloc_section; | |
c9269dff | 4104 | |
ec661b9d AM |
4105 | Output_data_brlt_powerpc(Target_powerpc<size, big_endian>* targ, |
4106 | Reloc_section* brlt_rel) | |
4107 | : Output_section_data_build(size == 32 ? 4 : 8), | |
4108 | rel_(brlt_rel), | |
4109 | targ_(targ) | |
4110 | { } | |
cf43a2fe | 4111 | |
06f30c9d CC |
4112 | void |
4113 | reset_brlt_sizes() | |
4114 | { | |
4115 | this->reset_data_size(); | |
4116 | this->rel_->reset_data_size(); | |
4117 | } | |
4118 | ||
4119 | void | |
4120 | finalize_brlt_sizes() | |
4121 | { | |
4122 | this->finalize_data_size(); | |
4123 | this->rel_->finalize_data_size(); | |
4124 | } | |
4125 | ||
ec661b9d | 4126 | // Add a reloc for an entry in the BRLT. |
cf43a2fe | 4127 | void |
ec661b9d AM |
4128 | add_reloc(Address to, unsigned int off) |
4129 | { this->rel_->add_relative(elfcpp::R_POWERPC_RELATIVE, this, off, to); } | |
e5d5f5ed | 4130 | |
ec661b9d | 4131 | // Update section and reloc section size. |
e5d5f5ed | 4132 | void |
ec661b9d AM |
4133 | set_current_size(unsigned int num_branches) |
4134 | { | |
4135 | this->reset_address_and_file_offset(); | |
4136 | this->set_current_data_size(num_branches * 16); | |
4137 | this->finalize_data_size(); | |
4138 | Output_section* os = this->output_section(); | |
4139 | os->set_section_offsets_need_adjustment(); | |
4140 | if (this->rel_ != NULL) | |
4141 | { | |
0e123f69 | 4142 | const unsigned int reloc_size = elfcpp::Elf_sizes<size>::rela_size; |
ec661b9d AM |
4143 | this->rel_->reset_address_and_file_offset(); |
4144 | this->rel_->set_current_data_size(num_branches * reloc_size); | |
4145 | this->rel_->finalize_data_size(); | |
4146 | Output_section* os = this->rel_->output_section(); | |
4147 | os->set_section_offsets_need_adjustment(); | |
4148 | } | |
4149 | } | |
cf43a2fe | 4150 | |
ec661b9d AM |
4151 | protected: |
4152 | void | |
4153 | do_adjust_output_section(Output_section* os) | |
4154 | { | |
4155 | os->set_entsize(0); | |
4156 | } | |
e5d5f5ed | 4157 | |
ec661b9d AM |
4158 | // Write to a map file. |
4159 | void | |
4160 | do_print_to_mapfile(Mapfile* mapfile) const | |
4161 | { mapfile->print_output_data(this, "** BRLT"); } | |
c9824451 | 4162 | |
ec661b9d AM |
4163 | private: |
4164 | // Write out the BRLT data. | |
4165 | void | |
4166 | do_write(Output_file*); | |
c9824451 | 4167 | |
ec661b9d AM |
4168 | // The reloc section. |
4169 | Reloc_section* rel_; | |
4170 | Target_powerpc<size, big_endian>* targ_; | |
4171 | }; | |
cf43a2fe | 4172 | |
ec661b9d AM |
4173 | // Make the branch lookup table section. |
4174 | ||
4175 | template<int size, bool big_endian> | |
4176 | void | |
4177 | Target_powerpc<size, big_endian>::make_brlt_section(Layout* layout) | |
4178 | { | |
4179 | if (size == 64 && this->brlt_section_ == NULL) | |
4180 | { | |
4181 | Reloc_section* brlt_rel = NULL; | |
4182 | bool is_pic = parameters->options().output_is_position_independent(); | |
4183 | if (is_pic) | |
4184 | { | |
54483898 AM |
4185 | // When PIC we can't fill in .branch_lt but must initialise at |
4186 | // runtime via dynamic relocations. | |
ec661b9d AM |
4187 | this->rela_dyn_section(layout); |
4188 | brlt_rel = new Reloc_section(false); | |
6528b6eb AM |
4189 | if (this->rela_dyn_->output_section()) |
4190 | this->rela_dyn_->output_section() | |
4191 | ->add_output_section_data(brlt_rel); | |
ec661b9d AM |
4192 | } |
4193 | this->brlt_section_ | |
4194 | = new Output_data_brlt_powerpc<size, big_endian>(this, brlt_rel); | |
6528b6eb | 4195 | if (this->plt_ && is_pic && this->plt_->output_section()) |
ec661b9d AM |
4196 | this->plt_->output_section() |
4197 | ->add_output_section_data(this->brlt_section_); | |
4198 | else | |
6830ee24 | 4199 | layout->add_output_section_data(".branch_lt", |
54483898 | 4200 | elfcpp::SHT_PROGBITS, |
ec661b9d AM |
4201 | elfcpp::SHF_ALLOC | elfcpp::SHF_WRITE, |
4202 | this->brlt_section_, | |
54483898 AM |
4203 | ORDER_RELRO, |
4204 | true); | |
ec661b9d AM |
4205 | } |
4206 | } | |
4207 | ||
6830ee24 | 4208 | // Write out .branch_lt when non-PIC. |
ec661b9d AM |
4209 | |
4210 | template<int size, bool big_endian> | |
4211 | void | |
4212 | Output_data_brlt_powerpc<size, big_endian>::do_write(Output_file* of) | |
4213 | { | |
4214 | if (size == 64 && !parameters->options().output_is_position_independent()) | |
4215 | { | |
4216 | const section_size_type offset = this->offset(); | |
4217 | const section_size_type oview_size | |
4218 | = convert_to_section_size_type(this->data_size()); | |
4219 | unsigned char* const oview = of->get_output_view(offset, oview_size); | |
4220 | ||
4221 | this->targ_->write_branch_lookup_table(oview); | |
4222 | of->write_output_view(offset, oview_size, oview); | |
4223 | } | |
4224 | } | |
4225 | ||
9e69ed50 AM |
4226 | static inline uint32_t |
4227 | l(uint32_t a) | |
4228 | { | |
4229 | return a & 0xffff; | |
4230 | } | |
4231 | ||
4232 | static inline uint32_t | |
4233 | hi(uint32_t a) | |
4234 | { | |
4235 | return l(a >> 16); | |
4236 | } | |
4237 | ||
4238 | static inline uint32_t | |
4239 | ha(uint32_t a) | |
4240 | { | |
4241 | return hi(a + 0x8000); | |
4242 | } | |
4243 | ||
9d5781f8 AM |
4244 | template<int size> |
4245 | struct Eh_cie | |
4246 | { | |
4247 | static const unsigned char eh_frame_cie[12]; | |
4248 | }; | |
4249 | ||
4250 | template<int size> | |
4251 | const unsigned char Eh_cie<size>::eh_frame_cie[] = | |
4252 | { | |
4253 | 1, // CIE version. | |
4254 | 'z', 'R', 0, // Augmentation string. | |
4255 | 4, // Code alignment. | |
4256 | 0x80 - size / 8 , // Data alignment. | |
4257 | 65, // RA reg. | |
4258 | 1, // Augmentation size. | |
4259 | (elfcpp::DW_EH_PE_pcrel | |
4260 | | elfcpp::DW_EH_PE_sdata4), // FDE encoding. | |
4261 | elfcpp::DW_CFA_def_cfa, 1, 0 // def_cfa: r1 offset 0. | |
4262 | }; | |
4263 | ||
b4f7960d AM |
4264 | // Describe __glink_PLTresolve use of LR, 64-bit version ABIv1. |
4265 | static const unsigned char glink_eh_frame_fde_64v1[] = | |
9d5781f8 AM |
4266 | { |
4267 | 0, 0, 0, 0, // Replaced with offset to .glink. | |
4268 | 0, 0, 0, 0, // Replaced with size of .glink. | |
4269 | 0, // Augmentation size. | |
4270 | elfcpp::DW_CFA_advance_loc + 1, | |
4271 | elfcpp::DW_CFA_register, 65, 12, | |
15a3a14f | 4272 | elfcpp::DW_CFA_advance_loc + 5, |
9d5781f8 AM |
4273 | elfcpp::DW_CFA_restore_extended, 65 |
4274 | }; | |
4275 | ||
b4f7960d AM |
4276 | // Describe __glink_PLTresolve use of LR, 64-bit version ABIv2. |
4277 | static const unsigned char glink_eh_frame_fde_64v2[] = | |
4278 | { | |
4279 | 0, 0, 0, 0, // Replaced with offset to .glink. | |
4280 | 0, 0, 0, 0, // Replaced with size of .glink. | |
4281 | 0, // Augmentation size. | |
4282 | elfcpp::DW_CFA_advance_loc + 1, | |
4283 | elfcpp::DW_CFA_register, 65, 0, | |
15a3a14f | 4284 | elfcpp::DW_CFA_advance_loc + 7, |
b4f7960d AM |
4285 | elfcpp::DW_CFA_restore_extended, 65 |
4286 | }; | |
4287 | ||
9d5781f8 AM |
4288 | // Describe __glink_PLTresolve use of LR, 32-bit version. |
4289 | static const unsigned char glink_eh_frame_fde_32[] = | |
4290 | { | |
4291 | 0, 0, 0, 0, // Replaced with offset to .glink. | |
4292 | 0, 0, 0, 0, // Replaced with size of .glink. | |
4293 | 0, // Augmentation size. | |
4294 | elfcpp::DW_CFA_advance_loc + 2, | |
4295 | elfcpp::DW_CFA_register, 65, 0, | |
4296 | elfcpp::DW_CFA_advance_loc + 4, | |
4297 | elfcpp::DW_CFA_restore_extended, 65 | |
4298 | }; | |
4299 | ||
4300 | static const unsigned char default_fde[] = | |
4301 | { | |
4302 | 0, 0, 0, 0, // Replaced with offset to stubs. | |
4303 | 0, 0, 0, 0, // Replaced with size of stubs. | |
4304 | 0, // Augmentation size. | |
4305 | elfcpp::DW_CFA_nop, // Pad. | |
4306 | elfcpp::DW_CFA_nop, | |
4307 | elfcpp::DW_CFA_nop | |
4308 | }; | |
4309 | ||
9e69ed50 AM |
4310 | template<bool big_endian> |
4311 | static inline void | |
4312 | write_insn(unsigned char* p, uint32_t v) | |
4313 | { | |
4314 | elfcpp::Swap<32, big_endian>::writeval(p, v); | |
4315 | } | |
4316 | ||
691d2e9a AM |
4317 | template<int size> |
4318 | static inline unsigned int | |
4319 | param_plt_align() | |
4320 | { | |
4321 | if (!parameters->options().user_set_plt_align()) | |
4322 | return size == 64 ? 32 : 8; | |
4323 | return 1 << parameters->options().plt_align(); | |
4324 | } | |
4325 | ||
ec661b9d AM |
4326 | // Stub_table holds information about plt and long branch stubs. |
4327 | // Stubs are built in an area following some input section determined | |
4328 | // by group_sections(). This input section is converted to a relaxed | |
4329 | // input section allowing it to be resized to accommodate the stubs | |
4330 | ||
4331 | template<int size, bool big_endian> | |
4332 | class Stub_table : public Output_relaxed_input_section | |
4333 | { | |
4334 | public: | |
7e57d19e AM |
4335 | struct Plt_stub_ent |
4336 | { | |
4337 | Plt_stub_ent(unsigned int off, unsigned int indx) | |
7ee7ff70 | 4338 | : off_(off), indx_(indx), r2save_(0), localentry0_(0) |
7e57d19e AM |
4339 | { } |
4340 | ||
4341 | unsigned int off_; | |
7ee7ff70 | 4342 | unsigned int indx_ : 30; |
7e57d19e | 4343 | unsigned int r2save_ : 1; |
7ee7ff70 | 4344 | unsigned int localentry0_ : 1; |
7e57d19e | 4345 | }; |
ec661b9d AM |
4346 | typedef typename elfcpp::Elf_types<size>::Elf_Addr Address; |
4347 | static const Address invalid_address = static_cast<Address>(0) - 1; | |
4348 | ||
a3e60ddb AM |
4349 | Stub_table(Target_powerpc<size, big_endian>* targ, |
4350 | Output_section* output_section, | |
590b87ff AM |
4351 | const Output_section::Input_section* owner, |
4352 | uint32_t id) | |
a3e60ddb AM |
4353 | : Output_relaxed_input_section(owner->relobj(), owner->shndx(), |
4354 | owner->relobj() | |
4355 | ->section_addralign(owner->shndx())), | |
ec661b9d | 4356 | targ_(targ), plt_call_stubs_(), long_branch_stubs_(), |
a3e60ddb AM |
4357 | orig_data_size_(owner->current_data_size()), |
4358 | plt_size_(0), last_plt_size_(0), | |
6395d38b | 4359 | branch_size_(0), last_branch_size_(0), min_size_threshold_(0), |
34e0882b AM |
4360 | need_save_res_(false), uniq_(id), tls_get_addr_opt_bctrl_(-1u), |
4361 | plt_fde_len_(0) | |
a3e60ddb AM |
4362 | { |
4363 | this->set_output_section(output_section); | |
ec661b9d | 4364 | |
a3e60ddb AM |
4365 | std::vector<Output_relaxed_input_section*> new_relaxed; |
4366 | new_relaxed.push_back(this); | |
4367 | output_section->convert_input_sections_to_relaxed_sections(new_relaxed); | |
4368 | } | |
ec661b9d AM |
4369 | |
4370 | // Add a plt call stub. | |
a3e60ddb AM |
4371 | bool |
4372 | add_plt_call_entry(Address, | |
4373 | const Sized_relobj_file<size, big_endian>*, | |
ec661b9d AM |
4374 | const Symbol*, |
4375 | unsigned int, | |
7e57d19e AM |
4376 | Address, |
4377 | bool); | |
ec661b9d | 4378 | |
a3e60ddb AM |
4379 | bool |
4380 | add_plt_call_entry(Address, | |
4381 | const Sized_relobj_file<size, big_endian>*, | |
ec661b9d AM |
4382 | unsigned int, |
4383 | unsigned int, | |
7e57d19e AM |
4384 | Address, |
4385 | bool); | |
ec661b9d AM |
4386 | |
4387 | // Find a given plt call stub. | |
7e57d19e | 4388 | const Plt_stub_ent* |
ec661b9d AM |
4389 | find_plt_call_entry(const Symbol*) const; |
4390 | ||
7e57d19e | 4391 | const Plt_stub_ent* |
ec661b9d AM |
4392 | find_plt_call_entry(const Sized_relobj_file<size, big_endian>*, |
4393 | unsigned int) const; | |
4394 | ||
7e57d19e | 4395 | const Plt_stub_ent* |
ec661b9d AM |
4396 | find_plt_call_entry(const Sized_relobj_file<size, big_endian>*, |
4397 | const Symbol*, | |
4398 | unsigned int, | |
4399 | Address) const; | |
4400 | ||
7e57d19e | 4401 | const Plt_stub_ent* |
ec661b9d AM |
4402 | find_plt_call_entry(const Sized_relobj_file<size, big_endian>*, |
4403 | unsigned int, | |
4404 | unsigned int, | |
4405 | Address) const; | |
4406 | ||
4407 | // Add a long branch stub. | |
a3e60ddb AM |
4408 | bool |
4409 | add_long_branch_entry(const Powerpc_relobj<size, big_endian>*, | |
d49044c7 | 4410 | unsigned int, Address, Address, bool); |
ec661b9d AM |
4411 | |
4412 | Address | |
9d5781f8 AM |
4413 | find_long_branch_entry(const Powerpc_relobj<size, big_endian>*, |
4414 | Address) const; | |
ec661b9d | 4415 | |
a3e60ddb AM |
4416 | bool |
4417 | can_reach_stub(Address from, unsigned int off, unsigned int r_type) | |
4418 | { | |
cbcb23fa | 4419 | Address max_branch_offset = max_branch_delta(r_type); |
a3e60ddb AM |
4420 | if (max_branch_offset == 0) |
4421 | return true; | |
4422 | gold_assert(from != invalid_address); | |
4423 | Address loc = off + this->stub_address(); | |
4424 | return loc - from + max_branch_offset < 2 * max_branch_offset; | |
4425 | } | |
4426 | ||
ec661b9d | 4427 | void |
a3e60ddb | 4428 | clear_stubs(bool all) |
cf43a2fe | 4429 | { |
9e69ed50 AM |
4430 | this->plt_call_stubs_.clear(); |
4431 | this->plt_size_ = 0; | |
ec661b9d AM |
4432 | this->long_branch_stubs_.clear(); |
4433 | this->branch_size_ = 0; | |
d49044c7 | 4434 | this->need_save_res_ = false; |
a3e60ddb AM |
4435 | if (all) |
4436 | { | |
4437 | this->last_plt_size_ = 0; | |
4438 | this->last_branch_size_ = 0; | |
4439 | } | |
cf43a2fe AM |
4440 | } |
4441 | ||
ec661b9d AM |
4442 | Address |
4443 | set_address_and_size(const Output_section* os, Address off) | |
cf43a2fe | 4444 | { |
ec661b9d AM |
4445 | Address start_off = off; |
4446 | off += this->orig_data_size_; | |
4447 | Address my_size = this->plt_size_ + this->branch_size_; | |
d49044c7 AM |
4448 | if (this->need_save_res_) |
4449 | my_size += this->targ_->savres_section()->data_size(); | |
ec661b9d AM |
4450 | if (my_size != 0) |
4451 | off = align_address(off, this->stub_align()); | |
4452 | // Include original section size and alignment padding in size | |
4453 | my_size += off - start_off; | |
6395d38b HS |
4454 | // Ensure new size is always larger than min size |
4455 | // threshold. Alignment requirement is included in "my_size", so | |
4456 | // increase "my_size" does not invalidate alignment. | |
4457 | if (my_size < this->min_size_threshold_) | |
4458 | my_size = this->min_size_threshold_; | |
ec661b9d AM |
4459 | this->reset_address_and_file_offset(); |
4460 | this->set_current_data_size(my_size); | |
4461 | this->set_address_and_file_offset(os->address() + start_off, | |
4462 | os->offset() + start_off); | |
4463 | return my_size; | |
cf43a2fe AM |
4464 | } |
4465 | ||
ec661b9d | 4466 | Address |
9d5781f8 | 4467 | stub_address() const |
ec661b9d AM |
4468 | { |
4469 | return align_address(this->address() + this->orig_data_size_, | |
4470 | this->stub_align()); | |
4471 | } | |
4472 | ||
4473 | Address | |
9d5781f8 | 4474 | stub_offset() const |
ec661b9d AM |
4475 | { |
4476 | return align_address(this->offset() + this->orig_data_size_, | |
4477 | this->stub_align()); | |
4478 | } | |
4479 | ||
4480 | section_size_type | |
4481 | plt_size() const | |
4482 | { return this->plt_size_; } | |
4483 | ||
590b87ff AM |
4484 | void |
4485 | set_min_size_threshold(Address min_size) | |
6395d38b HS |
4486 | { this->min_size_threshold_ = min_size; } |
4487 | ||
590b87ff AM |
4488 | void |
4489 | define_stub_syms(Symbol_table*); | |
4490 | ||
ec661b9d AM |
4491 | bool |
4492 | size_update() | |
4493 | { | |
4494 | Output_section* os = this->output_section(); | |
4495 | if (os->addralign() < this->stub_align()) | |
4496 | { | |
4497 | os->set_addralign(this->stub_align()); | |
4498 | // FIXME: get rid of the insane checkpointing. | |
4499 | // We can't increase alignment of the input section to which | |
4500 | // stubs are attached; The input section may be .init which | |
4501 | // is pasted together with other .init sections to form a | |
4502 | // function. Aligning might insert zero padding resulting in | |
4503 | // sigill. However we do need to increase alignment of the | |
4504 | // output section so that the align_address() on offset in | |
4505 | // set_address_and_size() adds the same padding as the | |
4506 | // align_address() on address in stub_address(). | |
4507 | // What's more, we need this alignment for the layout done in | |
4508 | // relaxation_loop_body() so that the output section starts at | |
4509 | // a suitably aligned address. | |
4510 | os->checkpoint_set_addralign(this->stub_align()); | |
4511 | } | |
9e69ed50 AM |
4512 | if (this->last_plt_size_ != this->plt_size_ |
4513 | || this->last_branch_size_ != this->branch_size_) | |
ec661b9d | 4514 | { |
9e69ed50 AM |
4515 | this->last_plt_size_ = this->plt_size_; |
4516 | this->last_branch_size_ = this->branch_size_; | |
ec661b9d AM |
4517 | return true; |
4518 | } | |
4519 | return false; | |
4520 | } | |
4521 | ||
34e0882b | 4522 | // Generate a suitable FDE to describe code in this stub group. |
9d5781f8 | 4523 | void |
34e0882b | 4524 | init_plt_fde(); |
be897fb7 | 4525 | |
34e0882b AM |
4526 | // Add .eh_frame info for this stub section. |
4527 | void | |
4528 | add_eh_frame(Layout* layout); | |
be897fb7 | 4529 | |
34e0882b | 4530 | // Remove .eh_frame info for this stub section. |
be897fb7 | 4531 | void |
34e0882b | 4532 | remove_eh_frame(Layout* layout); |
9d5781f8 | 4533 | |
ec661b9d AM |
4534 | Target_powerpc<size, big_endian>* |
4535 | targ() const | |
4536 | { return targ_; } | |
6ce78956 | 4537 | |
cf43a2fe | 4538 | private: |
bdab445c AM |
4539 | class Plt_stub_key; |
4540 | class Plt_stub_key_hash; | |
bdab445c AM |
4541 | typedef Unordered_map<Plt_stub_key, Plt_stub_ent, |
4542 | Plt_stub_key_hash> Plt_stub_entries; | |
590b87ff AM |
4543 | class Branch_stub_ent; |
4544 | class Branch_stub_ent_hash; | |
4545 | typedef Unordered_map<Branch_stub_ent, unsigned int, | |
4546 | Branch_stub_ent_hash> Branch_stub_entries; | |
9e69ed50 AM |
4547 | |
4548 | // Alignment of stub section. | |
ec661b9d | 4549 | unsigned int |
9e69ed50 AM |
4550 | stub_align() const |
4551 | { | |
691d2e9a | 4552 | unsigned int min_align = size == 64 ? 32 : 16; |
9e69ed50 AM |
4553 | unsigned int user_align = 1 << parameters->options().plt_align(); |
4554 | return std::max(user_align, min_align); | |
4555 | } | |
cf43a2fe | 4556 | |
91c2b899 AM |
4557 | // Return the plt offset for the given call stub. |
4558 | Address | |
08be3224 AM |
4559 | plt_off(typename Plt_stub_entries::const_iterator p, |
4560 | const Output_data_plt_powerpc<size, big_endian>** sec) const | |
91c2b899 AM |
4561 | { |
4562 | const Symbol* gsym = p->first.sym_; | |
4563 | if (gsym != NULL) | |
08be3224 | 4564 | return this->targ_->plt_off(gsym, sec); |
91c2b899 AM |
4565 | else |
4566 | { | |
91c2b899 AM |
4567 | const Sized_relobj_file<size, big_endian>* relobj = p->first.object_; |
4568 | unsigned int local_sym_index = p->first.locsym_; | |
08be3224 | 4569 | return this->targ_->plt_off(relobj, local_sym_index, sec); |
91c2b899 AM |
4570 | } |
4571 | } | |
4572 | ||
9e69ed50 | 4573 | // Size of a given plt call stub. |
ec661b9d | 4574 | unsigned int |
9e69ed50 AM |
4575 | plt_call_size(typename Plt_stub_entries::const_iterator p) const |
4576 | { | |
4577 | if (size == 32) | |
34e0882b AM |
4578 | { |
4579 | const Symbol* gsym = p->first.sym_; | |
9e390558 AM |
4580 | return (4 * 4 |
4581 | + (this->targ_->is_tls_get_addr_opt(gsym) ? 8 * 4 : 0)); | |
34e0882b | 4582 | } |
9e69ed50 | 4583 | |
08be3224 AM |
4584 | const Output_data_plt_powerpc<size, big_endian>* plt; |
4585 | Address plt_addr = this->plt_off(p, &plt); | |
4586 | plt_addr += plt->address(); | |
91c2b899 | 4587 | Address got_addr = this->targ_->got_section()->output_section()->address(); |
9e69ed50 AM |
4588 | const Powerpc_relobj<size, big_endian>* ppcobj = static_cast |
4589 | <const Powerpc_relobj<size, big_endian>*>(p->first.object_); | |
91c2b899 AM |
4590 | got_addr += ppcobj->toc_base_offset(); |
4591 | Address off = plt_addr - got_addr; | |
b4f7960d | 4592 | unsigned int bytes = 4 * 4 + 4 * (ha(off) != 0); |
34e0882b AM |
4593 | const Symbol* gsym = p->first.sym_; |
4594 | if (this->targ_->is_tls_get_addr_opt(gsym)) | |
4595 | bytes += 13 * 4; | |
b4f7960d AM |
4596 | if (this->targ_->abiversion() < 2) |
4597 | { | |
4598 | bool static_chain = parameters->options().plt_static_chain(); | |
4599 | bool thread_safe = this->targ_->plt_thread_safe(); | |
4600 | bytes += (4 | |
4601 | + 4 * static_chain | |
4602 | + 8 * thread_safe | |
4603 | + 4 * (ha(off + 8 + 8 * static_chain) != ha(off))); | |
4604 | } | |
34e0882b AM |
4605 | return bytes; |
4606 | } | |
4607 | ||
4608 | unsigned int | |
4609 | plt_call_align(unsigned int bytes) const | |
4610 | { | |
691d2e9a | 4611 | unsigned int align = param_plt_align<size>(); |
9e390558 | 4612 | return (bytes + align - 1) & -align; |
9e69ed50 | 4613 | } |
ec661b9d AM |
4614 | |
4615 | // Return long branch stub size. | |
4616 | unsigned int | |
590b87ff | 4617 | branch_stub_size(typename Branch_stub_entries::const_iterator p) |
ec661b9d | 4618 | { |
590b87ff AM |
4619 | Address loc = this->stub_address() + this->last_plt_size_ + p->second; |
4620 | if (p->first.dest_ - loc + (1 << 25) < 2 << 25) | |
ec661b9d | 4621 | return 4; |
9e390558 AM |
4622 | unsigned int bytes = 16; |
4623 | if (size == 32 && parameters->options().output_is_position_independent()) | |
4624 | bytes += 16; | |
4625 | return bytes; | |
ec661b9d AM |
4626 | } |
4627 | ||
4628 | // Write out stubs. | |
cf43a2fe AM |
4629 | void |
4630 | do_write(Output_file*); | |
4631 | ||
ec661b9d | 4632 | // Plt call stub keys. |
bdab445c | 4633 | class Plt_stub_key |
cf43a2fe | 4634 | { |
d1a8cabd | 4635 | public: |
bdab445c | 4636 | Plt_stub_key(const Symbol* sym) |
c9824451 AM |
4637 | : sym_(sym), object_(0), addend_(0), locsym_(0) |
4638 | { } | |
4639 | ||
bdab445c | 4640 | Plt_stub_key(const Sized_relobj_file<size, big_endian>* object, |
ec661b9d | 4641 | unsigned int locsym_index) |
c9824451 AM |
4642 | : sym_(NULL), object_(object), addend_(0), locsym_(locsym_index) |
4643 | { } | |
4644 | ||
bdab445c | 4645 | Plt_stub_key(const Sized_relobj_file<size, big_endian>* object, |
ec661b9d AM |
4646 | const Symbol* sym, |
4647 | unsigned int r_type, | |
4648 | Address addend) | |
e5d5f5ed | 4649 | : sym_(sym), object_(0), addend_(0), locsym_(0) |
cf43a2fe AM |
4650 | { |
4651 | if (size != 32) | |
ec661b9d | 4652 | this->addend_ = addend; |
d1a8cabd | 4653 | else if (parameters->options().output_is_position_independent() |
ec661b9d | 4654 | && r_type == elfcpp::R_PPC_PLTREL24) |
cf43a2fe | 4655 | { |
ec661b9d | 4656 | this->addend_ = addend; |
e5d5f5ed | 4657 | if (this->addend_ >= 32768) |
d1a8cabd | 4658 | this->object_ = object; |
cf43a2fe AM |
4659 | } |
4660 | } | |
4661 | ||
bdab445c | 4662 | Plt_stub_key(const Sized_relobj_file<size, big_endian>* object, |
ec661b9d AM |
4663 | unsigned int locsym_index, |
4664 | unsigned int r_type, | |
4665 | Address addend) | |
e5d5f5ed AM |
4666 | : sym_(NULL), object_(object), addend_(0), locsym_(locsym_index) |
4667 | { | |
4668 | if (size != 32) | |
ec661b9d | 4669 | this->addend_ = addend; |
e5d5f5ed | 4670 | else if (parameters->options().output_is_position_independent() |
ec661b9d AM |
4671 | && r_type == elfcpp::R_PPC_PLTREL24) |
4672 | this->addend_ = addend; | |
e5d5f5ed AM |
4673 | } |
4674 | ||
bdab445c | 4675 | bool operator==(const Plt_stub_key& that) const |
cf43a2fe AM |
4676 | { |
4677 | return (this->sym_ == that.sym_ | |
4678 | && this->object_ == that.object_ | |
e5d5f5ed AM |
4679 | && this->addend_ == that.addend_ |
4680 | && this->locsym_ == that.locsym_); | |
cf43a2fe | 4681 | } |
c9269dff AM |
4682 | |
4683 | const Symbol* sym_; | |
e5d5f5ed AM |
4684 | const Sized_relobj_file<size, big_endian>* object_; |
4685 | typename elfcpp::Elf_types<size>::Elf_Addr addend_; | |
4686 | unsigned int locsym_; | |
cf43a2fe AM |
4687 | }; |
4688 | ||
bdab445c | 4689 | class Plt_stub_key_hash |
cf43a2fe | 4690 | { |
d1a8cabd | 4691 | public: |
bdab445c | 4692 | size_t operator()(const Plt_stub_key& ent) const |
cf43a2fe AM |
4693 | { |
4694 | return (reinterpret_cast<uintptr_t>(ent.sym_) | |
4695 | ^ reinterpret_cast<uintptr_t>(ent.object_) | |
e5d5f5ed AM |
4696 | ^ ent.addend_ |
4697 | ^ ent.locsym_); | |
cf43a2fe | 4698 | } |
ec661b9d AM |
4699 | }; |
4700 | ||
4701 | // Long branch stub keys. | |
4702 | class Branch_stub_ent | |
4703 | { | |
4704 | public: | |
d49044c7 AM |
4705 | Branch_stub_ent(const Powerpc_relobj<size, big_endian>* obj, |
4706 | Address to, bool save_res) | |
4707 | : dest_(to), toc_base_off_(0), save_res_(save_res) | |
ec661b9d AM |
4708 | { |
4709 | if (size == 64) | |
4710 | toc_base_off_ = obj->toc_base_offset(); | |
4711 | } | |
4712 | ||
4713 | bool operator==(const Branch_stub_ent& that) const | |
4714 | { | |
4715 | return (this->dest_ == that.dest_ | |
4716 | && (size == 32 | |
4717 | || this->toc_base_off_ == that.toc_base_off_)); | |
4718 | } | |
cf43a2fe | 4719 | |
ec661b9d AM |
4720 | Address dest_; |
4721 | unsigned int toc_base_off_; | |
d49044c7 | 4722 | bool save_res_; |
ec661b9d | 4723 | }; |
cf43a2fe | 4724 | |
ec661b9d AM |
4725 | class Branch_stub_ent_hash |
4726 | { | |
4727 | public: | |
4728 | size_t operator()(const Branch_stub_ent& ent) const | |
4729 | { return ent.dest_ ^ ent.toc_base_off_; } | |
4730 | }; | |
cf43a2fe | 4731 | |
ec661b9d | 4732 | // In a sane world this would be a global. |
cf43a2fe | 4733 | Target_powerpc<size, big_endian>* targ_; |
ec661b9d | 4734 | // Map sym/object/addend to stub offset. |
ec661b9d AM |
4735 | Plt_stub_entries plt_call_stubs_; |
4736 | // Map destination address to stub offset. | |
ec661b9d AM |
4737 | Branch_stub_entries long_branch_stubs_; |
4738 | // size of input section | |
4739 | section_size_type orig_data_size_; | |
4740 | // size of stubs | |
9e69ed50 | 4741 | section_size_type plt_size_, last_plt_size_, branch_size_, last_branch_size_; |
6395d38b HS |
4742 | // Some rare cases cause (PR/20529) fluctuation in stub table |
4743 | // size, which leads to an endless relax loop. This is to be fixed | |
4744 | // by, after the first few iterations, allowing only increase of | |
4745 | // stub table size. This variable sets the minimal possible size of | |
4746 | // a stub table, it is zero for the first few iterations, then | |
4747 | // increases monotonically. | |
4748 | Address min_size_threshold_; | |
d49044c7 AM |
4749 | // Set if this stub group needs a copy of out-of-line register |
4750 | // save/restore functions. | |
4751 | bool need_save_res_; | |
590b87ff AM |
4752 | // Per stub table unique identifier. |
4753 | uint32_t uniq_; | |
34e0882b AM |
4754 | // The bctrl in the __tls_get_addr_opt stub, if present. |
4755 | unsigned int tls_get_addr_opt_bctrl_; | |
4756 | // FDE unwind info for this stub group. | |
4757 | unsigned int plt_fde_len_; | |
4758 | unsigned char plt_fde_[20]; | |
cf43a2fe AM |
4759 | }; |
4760 | ||
ec661b9d | 4761 | // Add a plt call stub, if we do not already have one for this |
d1a8cabd | 4762 | // sym/object/addend combo. |
cf43a2fe AM |
4763 | |
4764 | template<int size, bool big_endian> | |
a3e60ddb | 4765 | bool |
ec661b9d | 4766 | Stub_table<size, big_endian>::add_plt_call_entry( |
a3e60ddb | 4767 | Address from, |
c9824451 | 4768 | const Sized_relobj_file<size, big_endian>* object, |
d83ce4e3 | 4769 | const Symbol* gsym, |
ec661b9d | 4770 | unsigned int r_type, |
7e57d19e AM |
4771 | Address addend, |
4772 | bool tocsave) | |
cf43a2fe | 4773 | { |
bdab445c AM |
4774 | Plt_stub_key key(object, gsym, r_type, addend); |
4775 | Plt_stub_ent ent(this->plt_size_, this->plt_call_stubs_.size()); | |
9e69ed50 | 4776 | std::pair<typename Plt_stub_entries::iterator, bool> p |
bdab445c | 4777 | = this->plt_call_stubs_.insert(std::make_pair(key, ent)); |
9e69ed50 | 4778 | if (p.second) |
7ee7ff70 AM |
4779 | { |
4780 | this->plt_size_ = ent.off_ + this->plt_call_size(p.first); | |
4781 | if (size == 64 | |
4782 | && this->targ_->is_elfv2_localentry0(gsym)) | |
4783 | { | |
4784 | p.first->second.localentry0_ = 1; | |
4785 | this->targ_->set_has_localentry0(); | |
4786 | } | |
34e0882b AM |
4787 | if (this->targ_->is_tls_get_addr_opt(gsym)) |
4788 | { | |
4789 | this->targ_->set_has_tls_get_addr_opt(); | |
4790 | this->tls_get_addr_opt_bctrl_ = this->plt_size_ - 5 * 4; | |
4791 | } | |
4792 | this->plt_size_ = this->plt_call_align(this->plt_size_); | |
7ee7ff70 AM |
4793 | } |
4794 | if (size == 64 | |
4795 | && !tocsave | |
4796 | && !p.first->second.localentry0_) | |
7e57d19e | 4797 | p.first->second.r2save_ = 1; |
bdab445c | 4798 | return this->can_reach_stub(from, ent.off_, r_type); |
cf43a2fe AM |
4799 | } |
4800 | ||
e5d5f5ed | 4801 | template<int size, bool big_endian> |
a3e60ddb | 4802 | bool |
ec661b9d | 4803 | Stub_table<size, big_endian>::add_plt_call_entry( |
a3e60ddb | 4804 | Address from, |
c9824451 | 4805 | const Sized_relobj_file<size, big_endian>* object, |
e5d5f5ed | 4806 | unsigned int locsym_index, |
ec661b9d | 4807 | unsigned int r_type, |
7e57d19e AM |
4808 | Address addend, |
4809 | bool tocsave) | |
e5d5f5ed | 4810 | { |
bdab445c AM |
4811 | Plt_stub_key key(object, locsym_index, r_type, addend); |
4812 | Plt_stub_ent ent(this->plt_size_, this->plt_call_stubs_.size()); | |
9e69ed50 | 4813 | std::pair<typename Plt_stub_entries::iterator, bool> p |
bdab445c | 4814 | = this->plt_call_stubs_.insert(std::make_pair(key, ent)); |
9e69ed50 | 4815 | if (p.second) |
7ee7ff70 AM |
4816 | { |
4817 | this->plt_size_ = ent.off_ + this->plt_call_size(p.first); | |
34e0882b | 4818 | this->plt_size_ = this->plt_call_align(this->plt_size_); |
7ee7ff70 AM |
4819 | if (size == 64 |
4820 | && this->targ_->is_elfv2_localentry0(object, locsym_index)) | |
4821 | { | |
4822 | p.first->second.localentry0_ = 1; | |
4823 | this->targ_->set_has_localentry0(); | |
4824 | } | |
4825 | } | |
4826 | if (size == 64 | |
4827 | && !tocsave | |
4828 | && !p.first->second.localentry0_) | |
7e57d19e | 4829 | p.first->second.r2save_ = 1; |
bdab445c | 4830 | return this->can_reach_stub(from, ent.off_, r_type); |
e5d5f5ed AM |
4831 | } |
4832 | ||
ec661b9d AM |
4833 | // Find a plt call stub. |
4834 | ||
cf43a2fe | 4835 | template<int size, bool big_endian> |
7e57d19e | 4836 | const typename Stub_table<size, big_endian>::Plt_stub_ent* |
ec661b9d | 4837 | Stub_table<size, big_endian>::find_plt_call_entry( |
c9824451 | 4838 | const Sized_relobj_file<size, big_endian>* object, |
d83ce4e3 | 4839 | const Symbol* gsym, |
ec661b9d AM |
4840 | unsigned int r_type, |
4841 | Address addend) const | |
c9824451 | 4842 | { |
bdab445c AM |
4843 | Plt_stub_key key(object, gsym, r_type, addend); |
4844 | typename Plt_stub_entries::const_iterator p = this->plt_call_stubs_.find(key); | |
4845 | if (p == this->plt_call_stubs_.end()) | |
7e57d19e AM |
4846 | return NULL; |
4847 | return &p->second; | |
c9824451 AM |
4848 | } |
4849 | ||
4850 | template<int size, bool big_endian> | |
7e57d19e | 4851 | const typename Stub_table<size, big_endian>::Plt_stub_ent* |
ec661b9d | 4852 | Stub_table<size, big_endian>::find_plt_call_entry(const Symbol* gsym) const |
cf43a2fe | 4853 | { |
bdab445c AM |
4854 | Plt_stub_key key(gsym); |
4855 | typename Plt_stub_entries::const_iterator p = this->plt_call_stubs_.find(key); | |
7e57d19e AM |
4856 | if (p == this->plt_call_stubs_.end()) |
4857 | return NULL; | |
4858 | return &p->second; | |
cf43a2fe AM |
4859 | } |
4860 | ||
e5d5f5ed | 4861 | template<int size, bool big_endian> |
7e57d19e | 4862 | const typename Stub_table<size, big_endian>::Plt_stub_ent* |
ec661b9d | 4863 | Stub_table<size, big_endian>::find_plt_call_entry( |
c9824451 | 4864 | const Sized_relobj_file<size, big_endian>* object, |
e5d5f5ed | 4865 | unsigned int locsym_index, |
ec661b9d AM |
4866 | unsigned int r_type, |
4867 | Address addend) const | |
e5d5f5ed | 4868 | { |
bdab445c AM |
4869 | Plt_stub_key key(object, locsym_index, r_type, addend); |
4870 | typename Plt_stub_entries::const_iterator p = this->plt_call_stubs_.find(key); | |
4871 | if (p == this->plt_call_stubs_.end()) | |
7e57d19e AM |
4872 | return NULL; |
4873 | return &p->second; | |
c9824451 AM |
4874 | } |
4875 | ||
4876 | template<int size, bool big_endian> | |
7e57d19e | 4877 | const typename Stub_table<size, big_endian>::Plt_stub_ent* |
ec661b9d | 4878 | Stub_table<size, big_endian>::find_plt_call_entry( |
c9824451 AM |
4879 | const Sized_relobj_file<size, big_endian>* object, |
4880 | unsigned int locsym_index) const | |
4881 | { | |
bdab445c AM |
4882 | Plt_stub_key key(object, locsym_index); |
4883 | typename Plt_stub_entries::const_iterator p = this->plt_call_stubs_.find(key); | |
7e57d19e AM |
4884 | if (p == this->plt_call_stubs_.end()) |
4885 | return NULL; | |
4886 | return &p->second; | |
ec661b9d AM |
4887 | } |
4888 | ||
4889 | // Add a long branch stub if we don't already have one to given | |
4890 | // destination. | |
4891 | ||
4892 | template<int size, bool big_endian> | |
a3e60ddb | 4893 | bool |
ec661b9d AM |
4894 | Stub_table<size, big_endian>::add_long_branch_entry( |
4895 | const Powerpc_relobj<size, big_endian>* object, | |
a3e60ddb AM |
4896 | unsigned int r_type, |
4897 | Address from, | |
d49044c7 AM |
4898 | Address to, |
4899 | bool save_res) | |
ec661b9d | 4900 | { |
d49044c7 | 4901 | Branch_stub_ent ent(object, to, save_res); |
ec661b9d | 4902 | Address off = this->branch_size_; |
590b87ff AM |
4903 | std::pair<typename Branch_stub_entries::iterator, bool> p |
4904 | = this->long_branch_stubs_.insert(std::make_pair(ent, off)); | |
4905 | if (p.second) | |
ec661b9d | 4906 | { |
d49044c7 AM |
4907 | if (save_res) |
4908 | this->need_save_res_ = true; | |
4909 | else | |
4910 | { | |
590b87ff | 4911 | unsigned int stub_size = this->branch_stub_size(p.first); |
d49044c7 AM |
4912 | this->branch_size_ = off + stub_size; |
4913 | if (size == 64 && stub_size != 4) | |
4914 | this->targ_->add_branch_lookup_table(to); | |
4915 | } | |
ec661b9d | 4916 | } |
a3e60ddb | 4917 | return this->can_reach_stub(from, off, r_type); |
ec661b9d AM |
4918 | } |
4919 | ||
d49044c7 | 4920 | // Find long branch stub offset. |
ec661b9d AM |
4921 | |
4922 | template<int size, bool big_endian> | |
ec5b8187 | 4923 | typename Stub_table<size, big_endian>::Address |
ec661b9d AM |
4924 | Stub_table<size, big_endian>::find_long_branch_entry( |
4925 | const Powerpc_relobj<size, big_endian>* object, | |
9d5781f8 | 4926 | Address to) const |
ec661b9d | 4927 | { |
d49044c7 | 4928 | Branch_stub_ent ent(object, to, false); |
ec661b9d AM |
4929 | typename Branch_stub_entries::const_iterator p |
4930 | = this->long_branch_stubs_.find(ent); | |
d49044c7 AM |
4931 | if (p == this->long_branch_stubs_.end()) |
4932 | return invalid_address; | |
4933 | if (p->first.save_res_) | |
4934 | return to - this->targ_->savres_section()->address() + this->branch_size_; | |
4935 | return p->second; | |
e5d5f5ed AM |
4936 | } |
4937 | ||
34e0882b AM |
4938 | // Generate a suitable FDE to describe code in this stub group. |
4939 | // The __tls_get_addr_opt call stub needs to describe where it saves | |
4940 | // LR, to support exceptions that might be thrown from __tls_get_addr. | |
4941 | ||
4942 | template<int size, bool big_endian> | |
4943 | void | |
4944 | Stub_table<size, big_endian>::init_plt_fde() | |
4945 | { | |
4946 | unsigned char* p = this->plt_fde_; | |
4947 | // offset pcrel sdata4, size udata4, and augmentation size byte. | |
4948 | memset (p, 0, 9); | |
4949 | p += 9; | |
4950 | if (this->tls_get_addr_opt_bctrl_ != -1u) | |
4951 | { | |
4952 | unsigned int to_bctrl = this->tls_get_addr_opt_bctrl_ / 4; | |
4953 | if (to_bctrl < 64) | |
4954 | *p++ = elfcpp::DW_CFA_advance_loc + to_bctrl; | |
4955 | else if (to_bctrl < 256) | |
4956 | { | |
4957 | *p++ = elfcpp::DW_CFA_advance_loc1; | |
4958 | *p++ = to_bctrl; | |
4959 | } | |
4960 | else if (to_bctrl < 65536) | |
4961 | { | |
4962 | *p++ = elfcpp::DW_CFA_advance_loc2; | |
4963 | elfcpp::Swap<16, big_endian>::writeval(p, to_bctrl); | |
4964 | p += 2; | |
4965 | } | |
4966 | else | |
4967 | { | |
4968 | *p++ = elfcpp::DW_CFA_advance_loc4; | |
4969 | elfcpp::Swap<32, big_endian>::writeval(p, to_bctrl); | |
4970 | p += 4; | |
4971 | } | |
4972 | *p++ = elfcpp::DW_CFA_offset_extended_sf; | |
4973 | *p++ = 65; | |
4974 | *p++ = -(this->targ_->stk_linker() / 8) & 0x7f; | |
4975 | *p++ = elfcpp::DW_CFA_advance_loc + 4; | |
4976 | *p++ = elfcpp::DW_CFA_restore_extended; | |
4977 | *p++ = 65; | |
4978 | } | |
4979 | this->plt_fde_len_ = p - this->plt_fde_; | |
4980 | } | |
4981 | ||
4982 | // Add .eh_frame info for this stub section. Unlike other linker | |
4983 | // generated .eh_frame this is added late in the link, because we | |
4984 | // only want the .eh_frame info if this particular stub section is | |
4985 | // non-empty. | |
4986 | ||
4987 | template<int size, bool big_endian> | |
4988 | void | |
4989 | Stub_table<size, big_endian>::add_eh_frame(Layout* layout) | |
4990 | { | |
4991 | if (!parameters->options().ld_generated_unwind_info()) | |
4992 | return; | |
4993 | ||
4994 | // Since we add stub .eh_frame info late, it must be placed | |
4995 | // after all other linker generated .eh_frame info so that | |
4996 | // merge mapping need not be updated for input sections. | |
4997 | // There is no provision to use a different CIE to that used | |
4998 | // by .glink. | |
4999 | if (!this->targ_->has_glink()) | |
5000 | return; | |
5001 | ||
5002 | if (this->plt_size_ + this->branch_size_ + this->need_save_res_ == 0) | |
5003 | return; | |
5004 | ||
5005 | this->init_plt_fde(); | |
5006 | layout->add_eh_frame_for_plt(this, | |
5007 | Eh_cie<size>::eh_frame_cie, | |
5008 | sizeof (Eh_cie<size>::eh_frame_cie), | |
5009 | this->plt_fde_, this->plt_fde_len_); | |
5010 | } | |
5011 | ||
5012 | template<int size, bool big_endian> | |
5013 | void | |
5014 | Stub_table<size, big_endian>::remove_eh_frame(Layout* layout) | |
5015 | { | |
5016 | if (this->plt_fde_len_ != 0) | |
5017 | { | |
5018 | layout->remove_eh_frame_for_plt(this, | |
5019 | Eh_cie<size>::eh_frame_cie, | |
5020 | sizeof (Eh_cie<size>::eh_frame_cie), | |
5021 | this->plt_fde_, this->plt_fde_len_); | |
5022 | this->plt_fde_len_ = 0; | |
5023 | } | |
5024 | } | |
5025 | ||
ec661b9d AM |
5026 | // A class to handle .glink. |
5027 | ||
5028 | template<int size, bool big_endian> | |
5029 | class Output_data_glink : public Output_section_data | |
5030 | { | |
5031 | public: | |
9055360d AM |
5032 | typedef typename elfcpp::Elf_types<size>::Elf_Addr Address; |
5033 | static const Address invalid_address = static_cast<Address>(0) - 1; | |
ec661b9d AM |
5034 | |
5035 | Output_data_glink(Target_powerpc<size, big_endian>* targ) | |
9055360d AM |
5036 | : Output_section_data(16), targ_(targ), global_entry_stubs_(), |
5037 | end_branch_table_(), ge_size_(0) | |
ec661b9d AM |
5038 | { } |
5039 | ||
9d5781f8 | 5040 | void |
9055360d | 5041 | add_eh_frame(Layout* layout); |
9d5781f8 | 5042 | |
9055360d AM |
5043 | void |
5044 | add_global_entry(const Symbol*); | |
5045 | ||
5046 | Address | |
5047 | find_global_entry(const Symbol*) const; | |
5048 | ||
9e390558 AM |
5049 | unsigned int |
5050 | global_entry_align(unsigned int off) const | |
5051 | { | |
691d2e9a | 5052 | unsigned int align = param_plt_align<size>(); |
9e390558 AM |
5053 | return (off + align - 1) & -align; |
5054 | } | |
5055 | ||
5056 | unsigned int | |
5057 | global_entry_off() const | |
5058 | { | |
5059 | return this->global_entry_align(this->end_branch_table_); | |
5060 | } | |
5061 | ||
9055360d AM |
5062 | Address |
5063 | global_entry_address() const | |
5064 | { | |
5065 | gold_assert(this->is_data_size_valid()); | |
9e390558 AM |
5066 | return this->address() + this->global_entry_off(); |
5067 | } | |
5068 | ||
5069 | int | |
5070 | pltresolve_size() const | |
5071 | { | |
5072 | if (size == 64) | |
5073 | return (8 | |
407aa07c | 5074 | + (this->targ_->abiversion() < 2 ? 11 * 4 : 14 * 4)); |
9e390558 | 5075 | return 16 * 4; |
9d5781f8 AM |
5076 | } |
5077 | ||
ec661b9d AM |
5078 | protected: |
5079 | // Write to a map file. | |
5080 | void | |
5081 | do_print_to_mapfile(Mapfile* mapfile) const | |
5082 | { mapfile->print_output_data(this, _("** glink")); } | |
5083 | ||
5084 | private: | |
5085 | void | |
5086 | set_final_data_size(); | |
5087 | ||
5088 | // Write out .glink | |
5089 | void | |
5090 | do_write(Output_file*); | |
5091 | ||
5092 | // Allows access to .got and .plt for do_write. | |
5093 | Target_powerpc<size, big_endian>* targ_; | |
9055360d AM |
5094 | |
5095 | // Map sym to stub offset. | |
5096 | typedef Unordered_map<const Symbol*, unsigned int> Global_entry_stub_entries; | |
5097 | Global_entry_stub_entries global_entry_stubs_; | |
5098 | ||
5099 | unsigned int end_branch_table_, ge_size_; | |
ec661b9d AM |
5100 | }; |
5101 | ||
9055360d AM |
5102 | template<int size, bool big_endian> |
5103 | void | |
5104 | Output_data_glink<size, big_endian>::add_eh_frame(Layout* layout) | |
5105 | { | |
5106 | if (!parameters->options().ld_generated_unwind_info()) | |
5107 | return; | |
5108 | ||
5109 | if (size == 64) | |
5110 | { | |
5111 | if (this->targ_->abiversion() < 2) | |
5112 | layout->add_eh_frame_for_plt(this, | |
5113 | Eh_cie<64>::eh_frame_cie, | |
5114 | sizeof (Eh_cie<64>::eh_frame_cie), | |
5115 | glink_eh_frame_fde_64v1, | |
5116 | sizeof (glink_eh_frame_fde_64v1)); | |
5117 | else | |
5118 | layout->add_eh_frame_for_plt(this, | |
5119 | Eh_cie<64>::eh_frame_cie, | |
5120 | sizeof (Eh_cie<64>::eh_frame_cie), | |
5121 | glink_eh_frame_fde_64v2, | |
5122 | sizeof (glink_eh_frame_fde_64v2)); | |
5123 | } | |
5124 | else | |
5125 | { | |
5126 | // 32-bit .glink can use the default since the CIE return | |
5127 | // address reg, LR, is valid. | |
5128 | layout->add_eh_frame_for_plt(this, | |
5129 | Eh_cie<32>::eh_frame_cie, | |
5130 | sizeof (Eh_cie<32>::eh_frame_cie), | |
5131 | default_fde, | |
5132 | sizeof (default_fde)); | |
5133 | // Except where LR is used in a PIC __glink_PLTresolve. | |
5134 | if (parameters->options().output_is_position_independent()) | |
5135 | layout->add_eh_frame_for_plt(this, | |
5136 | Eh_cie<32>::eh_frame_cie, | |
5137 | sizeof (Eh_cie<32>::eh_frame_cie), | |
5138 | glink_eh_frame_fde_32, | |
5139 | sizeof (glink_eh_frame_fde_32)); | |
5140 | } | |
5141 | } | |
5142 | ||
5143 | template<int size, bool big_endian> | |
5144 | void | |
5145 | Output_data_glink<size, big_endian>::add_global_entry(const Symbol* gsym) | |
5146 | { | |
9e390558 | 5147 | unsigned int off = this->global_entry_align(this->ge_size_); |
9055360d | 5148 | std::pair<typename Global_entry_stub_entries::iterator, bool> p |
9e390558 | 5149 | = this->global_entry_stubs_.insert(std::make_pair(gsym, off)); |
9055360d | 5150 | if (p.second) |
407aa07c | 5151 | this->ge_size_ = off + 16; |
9055360d AM |
5152 | } |
5153 | ||
5154 | template<int size, bool big_endian> | |
5155 | typename Output_data_glink<size, big_endian>::Address | |
5156 | Output_data_glink<size, big_endian>::find_global_entry(const Symbol* gsym) const | |
5157 | { | |
5158 | typename Global_entry_stub_entries::const_iterator p | |
5159 | = this->global_entry_stubs_.find(gsym); | |
5160 | return p == this->global_entry_stubs_.end() ? invalid_address : p->second; | |
5161 | } | |
5162 | ||
cf43a2fe AM |
5163 | template<int size, bool big_endian> |
5164 | void | |
5165 | Output_data_glink<size, big_endian>::set_final_data_size() | |
5166 | { | |
ec661b9d AM |
5167 | unsigned int count = this->targ_->plt_entry_count(); |
5168 | section_size_type total = 0; | |
cf43a2fe AM |
5169 | |
5170 | if (count != 0) | |
5171 | { | |
5172 | if (size == 32) | |
5173 | { | |
cf43a2fe AM |
5174 | // space for branch table |
5175 | total += 4 * (count - 1); | |
5176 | ||
5177 | total += -total & 15; | |
9e390558 | 5178 | total += this->pltresolve_size(); |
cf43a2fe AM |
5179 | } |
5180 | else | |
5181 | { | |
9e390558 | 5182 | total += this->pltresolve_size(); |
cf43a2fe AM |
5183 | |
5184 | // space for branch table | |
b4f7960d AM |
5185 | total += 4 * count; |
5186 | if (this->targ_->abiversion() < 2) | |
5187 | { | |
5188 | total += 4 * count; | |
5189 | if (count > 0x8000) | |
5190 | total += 4 * (count - 0x8000); | |
5191 | } | |
cf43a2fe AM |
5192 | } |
5193 | } | |
9055360d | 5194 | this->end_branch_table_ = total; |
9e390558 | 5195 | total = this->global_entry_align(total); |
9055360d | 5196 | total += this->ge_size_; |
cf43a2fe AM |
5197 | |
5198 | this->set_data_size(total); | |
5199 | } | |
5200 | ||
590b87ff AM |
5201 | // Define symbols on stubs, identifying the stub. |
5202 | ||
5203 | template<int size, bool big_endian> | |
5204 | void | |
5205 | Stub_table<size, big_endian>::define_stub_syms(Symbol_table* symtab) | |
5206 | { | |
5207 | if (!this->plt_call_stubs_.empty()) | |
5208 | { | |
5209 | // The key for the plt call stub hash table includes addresses, | |
5210 | // therefore traversal order depends on those addresses, which | |
5211 | // can change between runs if gold is a PIE. Unfortunately the | |
5212 | // output .symtab ordering depends on the order in which symbols | |
5213 | // are added to the linker symtab. We want reproducible output | |
5214 | // so must sort the call stub symbols. | |
5215 | typedef typename Plt_stub_entries::const_iterator plt_iter; | |
5216 | std::vector<plt_iter> sorted; | |
5217 | sorted.resize(this->plt_call_stubs_.size()); | |
5218 | ||
5219 | for (plt_iter cs = this->plt_call_stubs_.begin(); | |
5220 | cs != this->plt_call_stubs_.end(); | |
5221 | ++cs) | |
bdab445c | 5222 | sorted[cs->second.indx_] = cs; |
590b87ff AM |
5223 | |
5224 | for (unsigned int i = 0; i < this->plt_call_stubs_.size(); ++i) | |
5225 | { | |
5226 | plt_iter cs = sorted[i]; | |
5227 | char add[10]; | |
5228 | add[0] = 0; | |
5229 | if (cs->first.addend_ != 0) | |
5230 | sprintf(add, "+%x", static_cast<uint32_t>(cs->first.addend_)); | |
94de2a2c JC |
5231 | char obj[10]; |
5232 | obj[0] = 0; | |
5233 | if (cs->first.object_) | |
590b87ff AM |
5234 | { |
5235 | const Powerpc_relobj<size, big_endian>* ppcobj = static_cast | |
5236 | <const Powerpc_relobj<size, big_endian>*>(cs->first.object_); | |
94de2a2c JC |
5237 | sprintf(obj, "%x:", ppcobj->uniq()); |
5238 | } | |
5239 | char localname[9]; | |
5240 | const char *symname; | |
5241 | if (cs->first.sym_ == NULL) | |
5242 | { | |
5243 | sprintf(localname, "%x", cs->first.locsym_); | |
590b87ff AM |
5244 | symname = localname; |
5245 | } | |
34e0882b AM |
5246 | else if (this->targ_->is_tls_get_addr_opt(cs->first.sym_)) |
5247 | symname = this->targ_->tls_get_addr_opt()->name(); | |
590b87ff AM |
5248 | else |
5249 | symname = cs->first.sym_->name(); | |
94de2a2c JC |
5250 | char* name = new char[8 + 10 + strlen(obj) + strlen(symname) + strlen(add) + 1]; |
5251 | sprintf(name, "%08x.plt_call.%s%s%s", this->uniq_, obj, symname, add); | |
bdab445c AM |
5252 | Address value |
5253 | = this->stub_address() - this->address() + cs->second.off_; | |
34e0882b | 5254 | unsigned int stub_size = this->plt_call_align(this->plt_call_size(cs)); |
590b87ff AM |
5255 | this->targ_->define_local(symtab, name, this, value, stub_size); |
5256 | } | |
5257 | } | |
5258 | ||
5259 | typedef typename Branch_stub_entries::const_iterator branch_iter; | |
5260 | for (branch_iter bs = this->long_branch_stubs_.begin(); | |
5261 | bs != this->long_branch_stubs_.end(); | |
5262 | ++bs) | |
5263 | { | |
5264 | if (bs->first.save_res_) | |
5265 | continue; | |
5266 | ||
5267 | char* name = new char[8 + 13 + 16 + 1]; | |
5268 | sprintf(name, "%08x.long_branch.%llx", this->uniq_, | |
5269 | static_cast<unsigned long long>(bs->first.dest_)); | |
5270 | Address value = (this->stub_address() - this->address() | |
5271 | + this->plt_size_ + bs->second); | |
5272 | unsigned int stub_size = this->branch_stub_size(bs); | |
5273 | this->targ_->define_local(symtab, name, this, value, stub_size); | |
5274 | } | |
5275 | } | |
5276 | ||
ec661b9d | 5277 | // Write out plt and long branch stub code. |
cf43a2fe AM |
5278 | |
5279 | template<int size, bool big_endian> | |
5280 | void | |
ec661b9d | 5281 | Stub_table<size, big_endian>::do_write(Output_file* of) |
cf43a2fe | 5282 | { |
ec661b9d AM |
5283 | if (this->plt_call_stubs_.empty() |
5284 | && this->long_branch_stubs_.empty()) | |
5285 | return; | |
5286 | ||
5287 | const section_size_type start_off = this->offset(); | |
5288 | const section_size_type off = this->stub_offset(); | |
42cacb20 | 5289 | const section_size_type oview_size = |
ec661b9d | 5290 | convert_to_section_size_type(this->data_size() - (off - start_off)); |
cf43a2fe | 5291 | unsigned char* const oview = of->get_output_view(off, oview_size); |
c9269dff | 5292 | unsigned char* p; |
42cacb20 | 5293 | |
cf43a2fe AM |
5294 | if (size == 64) |
5295 | { | |
ec661b9d AM |
5296 | const Output_data_got_powerpc<size, big_endian>* got |
5297 | = this->targ_->got_section(); | |
dd93cd0a | 5298 | Address got_os_addr = got->output_section()->address(); |
c9269dff | 5299 | |
ec661b9d | 5300 | if (!this->plt_call_stubs_.empty()) |
cf43a2fe | 5301 | { |
ec661b9d AM |
5302 | // Write out plt call stubs. |
5303 | typename Plt_stub_entries::const_iterator cs; | |
5304 | for (cs = this->plt_call_stubs_.begin(); | |
5305 | cs != this->plt_call_stubs_.end(); | |
5306 | ++cs) | |
e5d5f5ed | 5307 | { |
08be3224 AM |
5308 | const Output_data_plt_powerpc<size, big_endian>* plt; |
5309 | Address pltoff = this->plt_off(cs, &plt); | |
5310 | Address plt_addr = pltoff + plt->address(); | |
ec661b9d AM |
5311 | const Powerpc_relobj<size, big_endian>* ppcobj = static_cast |
5312 | <const Powerpc_relobj<size, big_endian>*>(cs->first.object_); | |
5313 | Address got_addr = got_os_addr + ppcobj->toc_base_offset(); | |
9e69ed50 | 5314 | Address off = plt_addr - got_addr; |
ec661b9d | 5315 | |
9e69ed50 | 5316 | if (off + 0x80008000 > 0xffffffff || (off & 7) != 0) |
ec661b9d AM |
5317 | gold_error(_("%s: linkage table error against `%s'"), |
5318 | cs->first.object_->name().c_str(), | |
5319 | cs->first.sym_->demangled_name().c_str()); | |
5320 | ||
b4f7960d AM |
5321 | bool plt_load_toc = this->targ_->abiversion() < 2; |
5322 | bool static_chain | |
5323 | = plt_load_toc && parameters->options().plt_static_chain(); | |
5324 | bool thread_safe | |
5325 | = plt_load_toc && this->targ_->plt_thread_safe(); | |
9e69ed50 AM |
5326 | bool use_fake_dep = false; |
5327 | Address cmp_branch_off = 0; | |
407aa07c | 5328 | if (thread_safe) |
9e69ed50 AM |
5329 | { |
5330 | unsigned int pltindex | |
5331 | = ((pltoff - this->targ_->first_plt_entry_offset()) | |
5332 | / this->targ_->plt_entry_size()); | |
5333 | Address glinkoff | |
9e390558 | 5334 | = (this->targ_->glink_section()->pltresolve_size() |
9e69ed50 AM |
5335 | + pltindex * 8); |
5336 | if (pltindex > 32768) | |
5337 | glinkoff += (pltindex - 32768) * 4; | |
5338 | Address to | |
5339 | = this->targ_->glink_section()->address() + glinkoff; | |
5340 | Address from | |
7e57d19e AM |
5341 | = (this->stub_address() + cs->second.off_ + 20 |
5342 | + 4 * cs->second.r2save_ | |
9e69ed50 AM |
5343 | + 4 * (ha(off) != 0) |
5344 | + 4 * (ha(off + 8 + 8 * static_chain) != ha(off)) | |
5345 | + 4 * static_chain); | |
5346 | cmp_branch_off = to - from; | |
5347 | use_fake_dep = cmp_branch_off + (1 << 25) >= (1 << 26); | |
5348 | } | |
5349 | ||
bdab445c | 5350 | p = oview + cs->second.off_; |
34e0882b AM |
5351 | const Symbol* gsym = cs->first.sym_; |
5352 | if (this->targ_->is_tls_get_addr_opt(gsym)) | |
5353 | { | |
5354 | write_insn<big_endian>(p, ld_11_3 + 0); | |
5355 | p += 4; | |
5356 | write_insn<big_endian>(p, ld_12_3 + 8); | |
5357 | p += 4; | |
5358 | write_insn<big_endian>(p, mr_0_3); | |
5359 | p += 4; | |
5360 | write_insn<big_endian>(p, cmpdi_11_0); | |
5361 | p += 4; | |
5362 | write_insn<big_endian>(p, add_3_12_13); | |
5363 | p += 4; | |
5364 | write_insn<big_endian>(p, beqlr); | |
5365 | p += 4; | |
5366 | write_insn<big_endian>(p, mr_3_0); | |
5367 | p += 4; | |
5368 | if (!cs->second.localentry0_) | |
5369 | { | |
5370 | write_insn<big_endian>(p, mflr_11); | |
5371 | p += 4; | |
5372 | write_insn<big_endian>(p, (std_11_1 | |
5373 | + this->targ_->stk_linker())); | |
5374 | p += 4; | |
5375 | } | |
407aa07c | 5376 | use_fake_dep = thread_safe; |
34e0882b | 5377 | } |
9e69ed50 | 5378 | if (ha(off) != 0) |
ec661b9d | 5379 | { |
7e57d19e AM |
5380 | if (cs->second.r2save_) |
5381 | { | |
5382 | write_insn<big_endian>(p, | |
5383 | std_2_1 + this->targ_->stk_toc()); | |
5384 | p += 4; | |
5385 | } | |
397998fc AM |
5386 | if (plt_load_toc) |
5387 | { | |
5388 | write_insn<big_endian>(p, addis_11_2 + ha(off)); | |
5389 | p += 4; | |
5390 | write_insn<big_endian>(p, ld_12_11 + l(off)); | |
5391 | p += 4; | |
5392 | } | |
5393 | else | |
5394 | { | |
5395 | write_insn<big_endian>(p, addis_12_2 + ha(off)); | |
5396 | p += 4; | |
5397 | write_insn<big_endian>(p, ld_12_12 + l(off)); | |
5398 | p += 4; | |
5399 | } | |
b4f7960d AM |
5400 | if (plt_load_toc |
5401 | && ha(off + 8 + 8 * static_chain) != ha(off)) | |
ec661b9d | 5402 | { |
b4f7960d AM |
5403 | write_insn<big_endian>(p, addi_11_11 + l(off)); |
5404 | p += 4; | |
9e69ed50 | 5405 | off = 0; |
ec661b9d | 5406 | } |
b4f7960d AM |
5407 | write_insn<big_endian>(p, mtctr_12); |
5408 | p += 4; | |
5409 | if (plt_load_toc) | |
9e69ed50 | 5410 | { |
b4f7960d AM |
5411 | if (use_fake_dep) |
5412 | { | |
5413 | write_insn<big_endian>(p, xor_2_12_12); | |
5414 | p += 4; | |
5415 | write_insn<big_endian>(p, add_11_11_2); | |
5416 | p += 4; | |
5417 | } | |
5418 | write_insn<big_endian>(p, ld_2_11 + l(off + 8)); | |
5419 | p += 4; | |
5420 | if (static_chain) | |
5421 | { | |
5422 | write_insn<big_endian>(p, ld_11_11 + l(off + 16)); | |
5423 | p += 4; | |
5424 | } | |
9e69ed50 | 5425 | } |
ec661b9d AM |
5426 | } |
5427 | else | |
5428 | { | |
7e57d19e AM |
5429 | if (cs->second.r2save_) |
5430 | { | |
5431 | write_insn<big_endian>(p, | |
5432 | std_2_1 + this->targ_->stk_toc()); | |
5433 | p += 4; | |
5434 | } | |
b4f7960d AM |
5435 | write_insn<big_endian>(p, ld_12_2 + l(off)); |
5436 | p += 4; | |
5437 | if (plt_load_toc | |
5438 | && ha(off + 8 + 8 * static_chain) != ha(off)) | |
ec661b9d | 5439 | { |
b4f7960d AM |
5440 | write_insn<big_endian>(p, addi_2_2 + l(off)); |
5441 | p += 4; | |
9e69ed50 | 5442 | off = 0; |
ec661b9d | 5443 | } |
b4f7960d AM |
5444 | write_insn<big_endian>(p, mtctr_12); |
5445 | p += 4; | |
5446 | if (plt_load_toc) | |
9e69ed50 | 5447 | { |
b4f7960d AM |
5448 | if (use_fake_dep) |
5449 | { | |
5450 | write_insn<big_endian>(p, xor_11_12_12); | |
5451 | p += 4; | |
5452 | write_insn<big_endian>(p, add_2_2_11); | |
5453 | p += 4; | |
5454 | } | |
5455 | if (static_chain) | |
5456 | { | |
5457 | write_insn<big_endian>(p, ld_11_2 + l(off + 16)); | |
5458 | p += 4; | |
5459 | } | |
5460 | write_insn<big_endian>(p, ld_2_2 + l(off + 8)); | |
5461 | p += 4; | |
9e69ed50 | 5462 | } |
ec661b9d | 5463 | } |
34e0882b AM |
5464 | if (!cs->second.localentry0_ |
5465 | && this->targ_->is_tls_get_addr_opt(gsym)) | |
5466 | { | |
407aa07c | 5467 | write_insn<big_endian>(p, bctrl); |
34e0882b AM |
5468 | p += 4; |
5469 | write_insn<big_endian>(p, ld_2_1 + this->targ_->stk_toc()); | |
5470 | p += 4; | |
5471 | write_insn<big_endian>(p, ld_11_1 + this->targ_->stk_linker()); | |
5472 | p += 4; | |
5473 | write_insn<big_endian>(p, mtlr_11); | |
5474 | p += 4; | |
5475 | write_insn<big_endian>(p, blr); | |
5476 | } | |
5477 | else if (thread_safe && !use_fake_dep) | |
9e69ed50 | 5478 | { |
b4f7960d AM |
5479 | write_insn<big_endian>(p, cmpldi_2_0); |
5480 | p += 4; | |
5481 | write_insn<big_endian>(p, bnectr_p4); | |
5482 | p += 4; | |
9e69ed50 AM |
5483 | write_insn<big_endian>(p, b | (cmp_branch_off & 0x3fffffc)); |
5484 | } | |
5485 | else | |
407aa07c | 5486 | write_insn<big_endian>(p, bctr); |
e5d5f5ed | 5487 | } |
ec661b9d AM |
5488 | } |
5489 | ||
5490 | // Write out long branch stubs. | |
5491 | typename Branch_stub_entries::const_iterator bs; | |
5492 | for (bs = this->long_branch_stubs_.begin(); | |
5493 | bs != this->long_branch_stubs_.end(); | |
5494 | ++bs) | |
5495 | { | |
d49044c7 AM |
5496 | if (bs->first.save_res_) |
5497 | continue; | |
ec661b9d AM |
5498 | p = oview + this->plt_size_ + bs->second; |
5499 | Address loc = this->stub_address() + this->plt_size_ + bs->second; | |
5500 | Address delta = bs->first.dest_ - loc; | |
5501 | if (delta + (1 << 25) < 2 << 25) | |
5502 | write_insn<big_endian>(p, b | (delta & 0x3fffffc)); | |
e5d5f5ed | 5503 | else |
cf43a2fe | 5504 | { |
ec661b9d AM |
5505 | Address brlt_addr |
5506 | = this->targ_->find_branch_lookup_table(bs->first.dest_); | |
5507 | gold_assert(brlt_addr != invalid_address); | |
5508 | brlt_addr += this->targ_->brlt_section()->address(); | |
5509 | Address got_addr = got_os_addr + bs->first.toc_base_off_; | |
5510 | Address brltoff = brlt_addr - got_addr; | |
5511 | if (ha(brltoff) == 0) | |
5512 | { | |
b4f7960d | 5513 | write_insn<big_endian>(p, ld_12_2 + l(brltoff)), p += 4; |
ec661b9d AM |
5514 | } |
5515 | else | |
cf43a2fe | 5516 | { |
397998fc AM |
5517 | write_insn<big_endian>(p, addis_12_2 + ha(brltoff)), p += 4; |
5518 | write_insn<big_endian>(p, ld_12_12 + l(brltoff)), p += 4; | |
cf43a2fe | 5519 | } |
b4f7960d | 5520 | write_insn<big_endian>(p, mtctr_12), p += 4; |
407aa07c | 5521 | write_insn<big_endian>(p, bctr); |
cf43a2fe | 5522 | } |
ec661b9d AM |
5523 | } |
5524 | } | |
5525 | else | |
5526 | { | |
5527 | if (!this->plt_call_stubs_.empty()) | |
5528 | { | |
ec661b9d AM |
5529 | // The address of _GLOBAL_OFFSET_TABLE_. |
5530 | Address g_o_t = invalid_address; | |
5531 | ||
5532 | // Write out plt call stubs. | |
5533 | typename Plt_stub_entries::const_iterator cs; | |
5534 | for (cs = this->plt_call_stubs_.begin(); | |
5535 | cs != this->plt_call_stubs_.end(); | |
5536 | ++cs) | |
cf43a2fe | 5537 | { |
08be3224 AM |
5538 | const Output_data_plt_powerpc<size, big_endian>* plt; |
5539 | Address plt_addr = this->plt_off(cs, &plt); | |
5540 | plt_addr += plt->address(); | |
ec661b9d | 5541 | |
bdab445c | 5542 | p = oview + cs->second.off_; |
34e0882b AM |
5543 | const Symbol* gsym = cs->first.sym_; |
5544 | if (this->targ_->is_tls_get_addr_opt(gsym)) | |
5545 | { | |
5546 | write_insn<big_endian>(p, lwz_11_3 + 0); | |
5547 | p += 4; | |
5548 | write_insn<big_endian>(p, lwz_12_3 + 4); | |
5549 | p += 4; | |
5550 | write_insn<big_endian>(p, mr_0_3); | |
5551 | p += 4; | |
5552 | write_insn<big_endian>(p, cmpwi_11_0); | |
5553 | p += 4; | |
5554 | write_insn<big_endian>(p, add_3_12_2); | |
5555 | p += 4; | |
5556 | write_insn<big_endian>(p, beqlr); | |
5557 | p += 4; | |
5558 | write_insn<big_endian>(p, mr_3_0); | |
5559 | p += 4; | |
5560 | write_insn<big_endian>(p, nop); | |
5561 | p += 4; | |
5562 | } | |
ec661b9d AM |
5563 | if (parameters->options().output_is_position_independent()) |
5564 | { | |
5565 | Address got_addr; | |
5566 | const Powerpc_relobj<size, big_endian>* ppcobj | |
5567 | = (static_cast<const Powerpc_relobj<size, big_endian>*> | |
5568 | (cs->first.object_)); | |
5569 | if (ppcobj != NULL && cs->first.addend_ >= 32768) | |
5570 | { | |
5571 | unsigned int got2 = ppcobj->got2_shndx(); | |
5572 | got_addr = ppcobj->get_output_section_offset(got2); | |
5573 | gold_assert(got_addr != invalid_address); | |
5574 | got_addr += (ppcobj->output_section(got2)->address() | |
5575 | + cs->first.addend_); | |
5576 | } | |
5577 | else | |
5578 | { | |
5579 | if (g_o_t == invalid_address) | |
5580 | { | |
5581 | const Output_data_got_powerpc<size, big_endian>* got | |
5582 | = this->targ_->got_section(); | |
5583 | g_o_t = got->address() + got->g_o_t(); | |
5584 | } | |
5585 | got_addr = g_o_t; | |
5586 | } | |
5587 | ||
9e69ed50 AM |
5588 | Address off = plt_addr - got_addr; |
5589 | if (ha(off) == 0) | |
9e390558 | 5590 | write_insn<big_endian>(p, lwz_11_30 + l(off)); |
ec661b9d AM |
5591 | else |
5592 | { | |
9e390558 AM |
5593 | write_insn<big_endian>(p, addis_11_30 + ha(off)); |
5594 | p += 4; | |
5595 | write_insn<big_endian>(p, lwz_11_11 + l(off)); | |
ec661b9d AM |
5596 | } |
5597 | } | |
5598 | else | |
5599 | { | |
9e390558 AM |
5600 | write_insn<big_endian>(p, lis_11 + ha(plt_addr)); |
5601 | p += 4; | |
5602 | write_insn<big_endian>(p, lwz_11_11 + l(plt_addr)); | |
ec661b9d | 5603 | } |
9e390558 AM |
5604 | p += 4; |
5605 | write_insn<big_endian>(p, mtctr_11); | |
5606 | p += 4; | |
407aa07c | 5607 | write_insn<big_endian>(p, bctr); |
ec661b9d AM |
5608 | } |
5609 | } | |
5610 | ||
5611 | // Write out long branch stubs. | |
5612 | typename Branch_stub_entries::const_iterator bs; | |
5613 | for (bs = this->long_branch_stubs_.begin(); | |
5614 | bs != this->long_branch_stubs_.end(); | |
5615 | ++bs) | |
5616 | { | |
d49044c7 AM |
5617 | if (bs->first.save_res_) |
5618 | continue; | |
ec661b9d AM |
5619 | p = oview + this->plt_size_ + bs->second; |
5620 | Address loc = this->stub_address() + this->plt_size_ + bs->second; | |
5621 | Address delta = bs->first.dest_ - loc; | |
5622 | if (delta + (1 << 25) < 2 << 25) | |
5623 | write_insn<big_endian>(p, b | (delta & 0x3fffffc)); | |
5624 | else if (!parameters->options().output_is_position_independent()) | |
5625 | { | |
9e390558 AM |
5626 | write_insn<big_endian>(p, lis_12 + ha(bs->first.dest_)); |
5627 | p += 4; | |
5628 | write_insn<big_endian>(p, addi_12_12 + l(bs->first.dest_)); | |
ec661b9d AM |
5629 | } |
5630 | else | |
5631 | { | |
5632 | delta -= 8; | |
9e390558 AM |
5633 | write_insn<big_endian>(p, mflr_0); |
5634 | p += 4; | |
5635 | write_insn<big_endian>(p, bcl_20_31); | |
5636 | p += 4; | |
5637 | write_insn<big_endian>(p, mflr_12); | |
5638 | p += 4; | |
5639 | write_insn<big_endian>(p, addis_12_12 + ha(delta)); | |
5640 | p += 4; | |
5641 | write_insn<big_endian>(p, addi_12_12 + l(delta)); | |
5642 | p += 4; | |
5643 | write_insn<big_endian>(p, mtlr_0); | |
cf43a2fe | 5644 | } |
9e390558 AM |
5645 | p += 4; |
5646 | write_insn<big_endian>(p, mtctr_12); | |
5647 | p += 4; | |
407aa07c | 5648 | write_insn<big_endian>(p, bctr); |
cf43a2fe | 5649 | } |
ec661b9d | 5650 | } |
d49044c7 AM |
5651 | if (this->need_save_res_) |
5652 | { | |
5653 | p = oview + this->plt_size_ + this->branch_size_; | |
5654 | memcpy (p, this->targ_->savres_section()->contents(), | |
5655 | this->targ_->savres_section()->data_size()); | |
5656 | } | |
ec661b9d AM |
5657 | } |
5658 | ||
5659 | // Write out .glink. | |
5660 | ||
5661 | template<int size, bool big_endian> | |
5662 | void | |
5663 | Output_data_glink<size, big_endian>::do_write(Output_file* of) | |
5664 | { | |
5665 | const section_size_type off = this->offset(); | |
5666 | const section_size_type oview_size = | |
5667 | convert_to_section_size_type(this->data_size()); | |
5668 | unsigned char* const oview = of->get_output_view(off, oview_size); | |
5669 | unsigned char* p; | |
5670 | ||
5671 | // The base address of the .plt section. | |
5672 | typedef typename elfcpp::Elf_types<size>::Elf_Addr Address; | |
5673 | Address plt_base = this->targ_->plt_section()->address(); | |
cf43a2fe | 5674 | |
ec661b9d AM |
5675 | if (size == 64) |
5676 | { | |
9055360d | 5677 | if (this->end_branch_table_ != 0) |
b4f7960d | 5678 | { |
9055360d AM |
5679 | // Write pltresolve stub. |
5680 | p = oview; | |
5681 | Address after_bcl = this->address() + 16; | |
5682 | Address pltoff = plt_base - after_bcl; | |
5683 | ||
5684 | elfcpp::Swap<64, big_endian>::writeval(p, pltoff), p += 8; | |
cf43a2fe | 5685 | |
b4f7960d | 5686 | if (this->targ_->abiversion() < 2) |
cf43a2fe | 5687 | { |
9055360d AM |
5688 | write_insn<big_endian>(p, mflr_12), p += 4; |
5689 | write_insn<big_endian>(p, bcl_20_31), p += 4; | |
5690 | write_insn<big_endian>(p, mflr_11), p += 4; | |
5691 | write_insn<big_endian>(p, ld_2_11 + l(-16)), p += 4; | |
5692 | write_insn<big_endian>(p, mtlr_12), p += 4; | |
5693 | write_insn<big_endian>(p, add_11_2_11), p += 4; | |
5694 | write_insn<big_endian>(p, ld_12_11 + 0), p += 4; | |
5695 | write_insn<big_endian>(p, ld_2_11 + 8), p += 4; | |
5696 | write_insn<big_endian>(p, mtctr_12), p += 4; | |
5697 | write_insn<big_endian>(p, ld_11_11 + 16), p += 4; | |
5698 | } | |
5699 | else | |
5700 | { | |
5701 | write_insn<big_endian>(p, mflr_0), p += 4; | |
5702 | write_insn<big_endian>(p, bcl_20_31), p += 4; | |
5703 | write_insn<big_endian>(p, mflr_11), p += 4; | |
7ee7ff70 | 5704 | write_insn<big_endian>(p, std_2_1 + 24), p += 4; |
9055360d AM |
5705 | write_insn<big_endian>(p, ld_2_11 + l(-16)), p += 4; |
5706 | write_insn<big_endian>(p, mtlr_0), p += 4; | |
5707 | write_insn<big_endian>(p, sub_12_12_11), p += 4; | |
5708 | write_insn<big_endian>(p, add_11_2_11), p += 4; | |
5709 | write_insn<big_endian>(p, addi_0_12 + l(-48)), p += 4; | |
5710 | write_insn<big_endian>(p, ld_12_11 + 0), p += 4; | |
5711 | write_insn<big_endian>(p, srdi_0_0_2), p += 4; | |
5712 | write_insn<big_endian>(p, mtctr_12), p += 4; | |
5713 | write_insn<big_endian>(p, ld_11_11 + 8), p += 4; | |
5714 | } | |
407aa07c | 5715 | write_insn<big_endian>(p, bctr), p += 4; |
9e390558 | 5716 | gold_assert(p == oview + this->pltresolve_size()); |
9055360d AM |
5717 | |
5718 | // Write lazy link call stubs. | |
5719 | uint32_t indx = 0; | |
5720 | while (p < oview + this->end_branch_table_) | |
5721 | { | |
5722 | if (this->targ_->abiversion() < 2) | |
b4f7960d | 5723 | { |
9055360d AM |
5724 | if (indx < 0x8000) |
5725 | { | |
5726 | write_insn<big_endian>(p, li_0_0 + indx), p += 4; | |
5727 | } | |
5728 | else | |
5729 | { | |
bbec1a5d | 5730 | write_insn<big_endian>(p, lis_0 + hi(indx)), p += 4; |
9055360d AM |
5731 | write_insn<big_endian>(p, ori_0_0_0 + l(indx)), p += 4; |
5732 | } | |
b4f7960d | 5733 | } |
9055360d AM |
5734 | uint32_t branch_off = 8 - (p - oview); |
5735 | write_insn<big_endian>(p, b + (branch_off & 0x3fffffc)), p += 4; | |
5736 | indx++; | |
cf43a2fe | 5737 | } |
9055360d AM |
5738 | } |
5739 | ||
5740 | Address plt_base = this->targ_->plt_section()->address(); | |
5741 | Address iplt_base = invalid_address; | |
9e390558 | 5742 | unsigned int global_entry_off = this->global_entry_off(); |
9055360d AM |
5743 | Address global_entry_base = this->address() + global_entry_off; |
5744 | typename Global_entry_stub_entries::const_iterator ge; | |
5745 | for (ge = this->global_entry_stubs_.begin(); | |
5746 | ge != this->global_entry_stubs_.end(); | |
5747 | ++ge) | |
5748 | { | |
5749 | p = oview + global_entry_off + ge->second; | |
5750 | Address plt_addr = ge->first->plt_offset(); | |
5751 | if (ge->first->type() == elfcpp::STT_GNU_IFUNC | |
5752 | && ge->first->can_use_relative_reloc(false)) | |
5753 | { | |
5754 | if (iplt_base == invalid_address) | |
5755 | iplt_base = this->targ_->iplt_section()->address(); | |
5756 | plt_addr += iplt_base; | |
5757 | } | |
5758 | else | |
5759 | plt_addr += plt_base; | |
5760 | Address my_addr = global_entry_base + ge->second; | |
5761 | Address off = plt_addr - my_addr; | |
5762 | ||
5763 | if (off + 0x80008000 > 0xffffffff || (off & 3) != 0) | |
5764 | gold_error(_("%s: linkage table error against `%s'"), | |
5765 | ge->first->object()->name().c_str(), | |
5766 | ge->first->demangled_name().c_str()); | |
5767 | ||
5768 | write_insn<big_endian>(p, addis_12_12 + ha(off)), p += 4; | |
5769 | write_insn<big_endian>(p, ld_12_12 + l(off)), p += 4; | |
5770 | write_insn<big_endian>(p, mtctr_12), p += 4; | |
407aa07c | 5771 | write_insn<big_endian>(p, bctr); |
cf43a2fe AM |
5772 | } |
5773 | } | |
5774 | else | |
5775 | { | |
ec661b9d AM |
5776 | const Output_data_got_powerpc<size, big_endian>* got |
5777 | = this->targ_->got_section(); | |
dd93cd0a AM |
5778 | // The address of _GLOBAL_OFFSET_TABLE_. |
5779 | Address g_o_t = got->address() + got->g_o_t(); | |
c9269dff | 5780 | |
cf43a2fe | 5781 | // Write out pltresolve branch table. |
ec661b9d | 5782 | p = oview; |
9e390558 | 5783 | unsigned int the_end = oview_size - this->pltresolve_size(); |
c9269dff | 5784 | unsigned char* end_p = oview + the_end; |
cf43a2fe AM |
5785 | while (p < end_p - 8 * 4) |
5786 | write_insn<big_endian>(p, b + end_p - p), p += 4; | |
5787 | while (p < end_p) | |
5788 | write_insn<big_endian>(p, nop), p += 4; | |
42cacb20 | 5789 | |
cf43a2fe | 5790 | // Write out pltresolve call stub. |
9e390558 | 5791 | end_p = oview + oview_size; |
cf43a2fe | 5792 | if (parameters->options().output_is_position_independent()) |
42cacb20 | 5793 | { |
ec661b9d | 5794 | Address res0_off = 0; |
dd93cd0a AM |
5795 | Address after_bcl_off = the_end + 12; |
5796 | Address bcl_res0 = after_bcl_off - res0_off; | |
cf43a2fe | 5797 | |
9e390558 AM |
5798 | write_insn<big_endian>(p, addis_11_11 + ha(bcl_res0)); |
5799 | p += 4; | |
5800 | write_insn<big_endian>(p, mflr_0); | |
5801 | p += 4; | |
5802 | write_insn<big_endian>(p, bcl_20_31); | |
5803 | p += 4; | |
5804 | write_insn<big_endian>(p, addi_11_11 + l(bcl_res0)); | |
5805 | p += 4; | |
5806 | write_insn<big_endian>(p, mflr_12); | |
5807 | p += 4; | |
5808 | write_insn<big_endian>(p, mtlr_0); | |
5809 | p += 4; | |
5810 | write_insn<big_endian>(p, sub_11_11_12); | |
5811 | p += 4; | |
cf43a2fe | 5812 | |
dd93cd0a | 5813 | Address got_bcl = g_o_t + 4 - (after_bcl_off + this->address()); |
cf43a2fe | 5814 | |
9e390558 AM |
5815 | write_insn<big_endian>(p, addis_12_12 + ha(got_bcl)); |
5816 | p += 4; | |
cf43a2fe AM |
5817 | if (ha(got_bcl) == ha(got_bcl + 4)) |
5818 | { | |
9e390558 AM |
5819 | write_insn<big_endian>(p, lwz_0_12 + l(got_bcl)); |
5820 | p += 4; | |
5821 | write_insn<big_endian>(p, lwz_12_12 + l(got_bcl + 4)); | |
cf43a2fe AM |
5822 | } |
5823 | else | |
5824 | { | |
9e390558 AM |
5825 | write_insn<big_endian>(p, lwzu_0_12 + l(got_bcl)); |
5826 | p += 4; | |
5827 | write_insn<big_endian>(p, lwz_12_12 + 4); | |
cf43a2fe | 5828 | } |
9e390558 AM |
5829 | p += 4; |
5830 | write_insn<big_endian>(p, mtctr_0); | |
5831 | p += 4; | |
5832 | write_insn<big_endian>(p, add_0_11_11); | |
5833 | p += 4; | |
5834 | write_insn<big_endian>(p, add_11_0_11); | |
42cacb20 | 5835 | } |
cf43a2fe | 5836 | else |
42cacb20 | 5837 | { |
ec661b9d | 5838 | Address res0 = this->address(); |
cf43a2fe | 5839 | |
9e390558 AM |
5840 | write_insn<big_endian>(p, lis_12 + ha(g_o_t + 4)); |
5841 | p += 4; | |
5842 | write_insn<big_endian>(p, addis_11_11 + ha(-res0)); | |
5843 | p += 4; | |
cf43a2fe | 5844 | if (ha(g_o_t + 4) == ha(g_o_t + 8)) |
9e390558 | 5845 | write_insn<big_endian>(p, lwz_0_12 + l(g_o_t + 4)); |
cf43a2fe | 5846 | else |
9e390558 AM |
5847 | write_insn<big_endian>(p, lwzu_0_12 + l(g_o_t + 4)); |
5848 | p += 4; | |
5849 | write_insn<big_endian>(p, addi_11_11 + l(-res0)); | |
5850 | p += 4; | |
5851 | write_insn<big_endian>(p, mtctr_0); | |
5852 | p += 4; | |
5853 | write_insn<big_endian>(p, add_0_11_11); | |
5854 | p += 4; | |
cf43a2fe | 5855 | if (ha(g_o_t + 4) == ha(g_o_t + 8)) |
9e390558 | 5856 | write_insn<big_endian>(p, lwz_12_12 + l(g_o_t + 8)); |
cf43a2fe | 5857 | else |
9e390558 AM |
5858 | write_insn<big_endian>(p, lwz_12_12 + 4); |
5859 | p += 4; | |
5860 | write_insn<big_endian>(p, add_11_0_11); | |
5861 | } | |
5862 | p += 4; | |
407aa07c AM |
5863 | write_insn<big_endian>(p, bctr); |
5864 | p += 4; | |
9e390558 AM |
5865 | while (p < end_p) |
5866 | { | |
5867 | write_insn<big_endian>(p, nop); | |
5868 | p += 4; | |
42cacb20 DE |
5869 | } |
5870 | } | |
5871 | ||
cf43a2fe AM |
5872 | of->write_output_view(off, oview_size, oview); |
5873 | } | |
5874 | ||
f3a0ed29 AM |
5875 | |
5876 | // A class to handle linker generated save/restore functions. | |
5877 | ||
5878 | template<int size, bool big_endian> | |
5879 | class Output_data_save_res : public Output_section_data_build | |
5880 | { | |
5881 | public: | |
5882 | Output_data_save_res(Symbol_table* symtab); | |
5883 | ||
d49044c7 AM |
5884 | const unsigned char* |
5885 | contents() const | |
5886 | { | |
5887 | return contents_; | |
5888 | } | |
5889 | ||
f3a0ed29 AM |
5890 | protected: |
5891 | // Write to a map file. | |
5892 | void | |
5893 | do_print_to_mapfile(Mapfile* mapfile) const | |
5894 | { mapfile->print_output_data(this, _("** save/restore")); } | |
5895 | ||
5896 | void | |
5897 | do_write(Output_file*); | |
5898 | ||
5899 | private: | |
5900 | // The maximum size of save/restore contents. | |
5901 | static const unsigned int savres_max = 218*4; | |
5902 | ||
5903 | void | |
5904 | savres_define(Symbol_table* symtab, | |
5905 | const char *name, | |
5906 | unsigned int lo, unsigned int hi, | |
5907 | unsigned char* write_ent(unsigned char*, int), | |
5908 | unsigned char* write_tail(unsigned char*, int)); | |
5909 | ||
5910 | unsigned char *contents_; | |
5911 | }; | |
5912 | ||
5913 | template<bool big_endian> | |
5914 | static unsigned char* | |
5915 | savegpr0(unsigned char* p, int r) | |
5916 | { | |
5917 | uint32_t insn = std_0_1 + (r << 21) + (1 << 16) - (32 - r) * 8; | |
5918 | write_insn<big_endian>(p, insn); | |
5919 | return p + 4; | |
5920 | } | |
5921 | ||
5922 | template<bool big_endian> | |
5923 | static unsigned char* | |
5924 | savegpr0_tail(unsigned char* p, int r) | |
5925 | { | |
5926 | p = savegpr0<big_endian>(p, r); | |
5927 | uint32_t insn = std_0_1 + 16; | |
5928 | write_insn<big_endian>(p, insn); | |
5929 | p = p + 4; | |
5930 | write_insn<big_endian>(p, blr); | |
5931 | return p + 4; | |
5932 | } | |
5933 | ||
5934 | template<bool big_endian> | |
62fe925a | 5935 | static unsigned char* |
f3a0ed29 AM |
5936 | restgpr0(unsigned char* p, int r) |
5937 | { | |
5938 | uint32_t insn = ld_0_1 + (r << 21) + (1 << 16) - (32 - r) * 8; | |
5939 | write_insn<big_endian>(p, insn); | |
5940 | return p + 4; | |
5941 | } | |
5942 | ||
5943 | template<bool big_endian> | |
62fe925a | 5944 | static unsigned char* |
f3a0ed29 AM |
5945 | restgpr0_tail(unsigned char* p, int r) |
5946 | { | |
5947 | uint32_t insn = ld_0_1 + 16; | |
5948 | write_insn<big_endian>(p, insn); | |
5949 | p = p + 4; | |
5950 | p = restgpr0<big_endian>(p, r); | |
5951 | write_insn<big_endian>(p, mtlr_0); | |
5952 | p = p + 4; | |
5953 | if (r == 29) | |
5954 | { | |
5955 | p = restgpr0<big_endian>(p, 30); | |
5956 | p = restgpr0<big_endian>(p, 31); | |
5957 | } | |
5958 | write_insn<big_endian>(p, blr); | |
5959 | return p + 4; | |
5960 | } | |
5961 | ||
5962 | template<bool big_endian> | |
62fe925a | 5963 | static unsigned char* |
f3a0ed29 AM |
5964 | savegpr1(unsigned char* p, int r) |
5965 | { | |
5966 | uint32_t insn = std_0_12 + (r << 21) + (1 << 16) - (32 - r) * 8; | |
5967 | write_insn<big_endian>(p, insn); | |
5968 | return p + 4; | |
5969 | } | |
5970 | ||
5971 | template<bool big_endian> | |
62fe925a | 5972 | static unsigned char* |
f3a0ed29 AM |
5973 | savegpr1_tail(unsigned char* p, int r) |
5974 | { | |
5975 | p = savegpr1<big_endian>(p, r); | |
5976 | write_insn<big_endian>(p, blr); | |
5977 | return p + 4; | |
5978 | } | |
5979 | ||
5980 | template<bool big_endian> | |
62fe925a | 5981 | static unsigned char* |
f3a0ed29 AM |
5982 | restgpr1(unsigned char* p, int r) |
5983 | { | |
5984 | uint32_t insn = ld_0_12 + (r << 21) + (1 << 16) - (32 - r) * 8; | |
5985 | write_insn<big_endian>(p, insn); | |
5986 | return p + 4; | |
5987 | } | |
5988 | ||
5989 | template<bool big_endian> | |
62fe925a | 5990 | static unsigned char* |
f3a0ed29 AM |
5991 | restgpr1_tail(unsigned char* p, int r) |
5992 | { | |
5993 | p = restgpr1<big_endian>(p, r); | |
5994 | write_insn<big_endian>(p, blr); | |
5995 | return p + 4; | |
5996 | } | |
5997 | ||
5998 | template<bool big_endian> | |
62fe925a | 5999 | static unsigned char* |
f3a0ed29 AM |
6000 | savefpr(unsigned char* p, int r) |
6001 | { | |
6002 | uint32_t insn = stfd_0_1 + (r << 21) + (1 << 16) - (32 - r) * 8; | |
6003 | write_insn<big_endian>(p, insn); | |
6004 | return p + 4; | |
6005 | } | |
6006 | ||
6007 | template<bool big_endian> | |
62fe925a | 6008 | static unsigned char* |
f3a0ed29 AM |
6009 | savefpr0_tail(unsigned char* p, int r) |
6010 | { | |
6011 | p = savefpr<big_endian>(p, r); | |
6012 | write_insn<big_endian>(p, std_0_1 + 16); | |
6013 | p = p + 4; | |
6014 | write_insn<big_endian>(p, blr); | |
6015 | return p + 4; | |
6016 | } | |
6017 | ||
6018 | template<bool big_endian> | |
62fe925a | 6019 | static unsigned char* |
f3a0ed29 AM |
6020 | restfpr(unsigned char* p, int r) |
6021 | { | |
6022 | uint32_t insn = lfd_0_1 + (r << 21) + (1 << 16) - (32 - r) * 8; | |
6023 | write_insn<big_endian>(p, insn); | |
6024 | return p + 4; | |
6025 | } | |
6026 | ||
6027 | template<bool big_endian> | |
62fe925a | 6028 | static unsigned char* |
f3a0ed29 AM |
6029 | restfpr0_tail(unsigned char* p, int r) |
6030 | { | |
6031 | write_insn<big_endian>(p, ld_0_1 + 16); | |
6032 | p = p + 4; | |
6033 | p = restfpr<big_endian>(p, r); | |
6034 | write_insn<big_endian>(p, mtlr_0); | |
6035 | p = p + 4; | |
6036 | if (r == 29) | |
6037 | { | |
6038 | p = restfpr<big_endian>(p, 30); | |
6039 | p = restfpr<big_endian>(p, 31); | |
6040 | } | |
6041 | write_insn<big_endian>(p, blr); | |
6042 | return p + 4; | |
6043 | } | |
6044 | ||
6045 | template<bool big_endian> | |
62fe925a | 6046 | static unsigned char* |
f3a0ed29 AM |
6047 | savefpr1_tail(unsigned char* p, int r) |
6048 | { | |
6049 | p = savefpr<big_endian>(p, r); | |
6050 | write_insn<big_endian>(p, blr); | |
6051 | return p + 4; | |
6052 | } | |
6053 | ||
6054 | template<bool big_endian> | |
62fe925a | 6055 | static unsigned char* |
f3a0ed29 AM |
6056 | restfpr1_tail(unsigned char* p, int r) |
6057 | { | |
6058 | p = restfpr<big_endian>(p, r); | |
6059 | write_insn<big_endian>(p, blr); | |
6060 | return p + 4; | |
6061 | } | |
6062 | ||
6063 | template<bool big_endian> | |
62fe925a | 6064 | static unsigned char* |
f3a0ed29 AM |
6065 | savevr(unsigned char* p, int r) |
6066 | { | |
6067 | uint32_t insn = li_12_0 + (1 << 16) - (32 - r) * 16; | |
6068 | write_insn<big_endian>(p, insn); | |
6069 | p = p + 4; | |
6070 | insn = stvx_0_12_0 + (r << 21); | |
6071 | write_insn<big_endian>(p, insn); | |
6072 | return p + 4; | |
6073 | } | |
6074 | ||
6075 | template<bool big_endian> | |
62fe925a | 6076 | static unsigned char* |
f3a0ed29 AM |
6077 | savevr_tail(unsigned char* p, int r) |
6078 | { | |
6079 | p = savevr<big_endian>(p, r); | |
6080 | write_insn<big_endian>(p, blr); | |
6081 | return p + 4; | |
6082 | } | |
6083 | ||
6084 | template<bool big_endian> | |
62fe925a | 6085 | static unsigned char* |
f3a0ed29 AM |
6086 | restvr(unsigned char* p, int r) |
6087 | { | |
6088 | uint32_t insn = li_12_0 + (1 << 16) - (32 - r) * 16; | |
6089 | write_insn<big_endian>(p, insn); | |
6090 | p = p + 4; | |
6091 | insn = lvx_0_12_0 + (r << 21); | |
6092 | write_insn<big_endian>(p, insn); | |
6093 | return p + 4; | |
6094 | } | |
6095 | ||
6096 | template<bool big_endian> | |
62fe925a | 6097 | static unsigned char* |
f3a0ed29 AM |
6098 | restvr_tail(unsigned char* p, int r) |
6099 | { | |
6100 | p = restvr<big_endian>(p, r); | |
6101 | write_insn<big_endian>(p, blr); | |
6102 | return p + 4; | |
6103 | } | |
6104 | ||
6105 | ||
6106 | template<int size, bool big_endian> | |
6107 | Output_data_save_res<size, big_endian>::Output_data_save_res( | |
6108 | Symbol_table* symtab) | |
6109 | : Output_section_data_build(4), | |
6110 | contents_(NULL) | |
6111 | { | |
6112 | this->savres_define(symtab, | |
6113 | "_savegpr0_", 14, 31, | |
6114 | savegpr0<big_endian>, savegpr0_tail<big_endian>); | |
6115 | this->savres_define(symtab, | |
6116 | "_restgpr0_", 14, 29, | |
6117 | restgpr0<big_endian>, restgpr0_tail<big_endian>); | |
6118 | this->savres_define(symtab, | |
6119 | "_restgpr0_", 30, 31, | |
6120 | restgpr0<big_endian>, restgpr0_tail<big_endian>); | |
6121 | this->savres_define(symtab, | |
6122 | "_savegpr1_", 14, 31, | |
6123 | savegpr1<big_endian>, savegpr1_tail<big_endian>); | |
6124 | this->savres_define(symtab, | |
6125 | "_restgpr1_", 14, 31, | |
6126 | restgpr1<big_endian>, restgpr1_tail<big_endian>); | |
6127 | this->savres_define(symtab, | |
6128 | "_savefpr_", 14, 31, | |
6129 | savefpr<big_endian>, savefpr0_tail<big_endian>); | |
6130 | this->savres_define(symtab, | |
6131 | "_restfpr_", 14, 29, | |
6132 | restfpr<big_endian>, restfpr0_tail<big_endian>); | |
6133 | this->savres_define(symtab, | |
6134 | "_restfpr_", 30, 31, | |
6135 | restfpr<big_endian>, restfpr0_tail<big_endian>); | |
6136 | this->savres_define(symtab, | |
6137 | "._savef", 14, 31, | |
6138 | savefpr<big_endian>, savefpr1_tail<big_endian>); | |
6139 | this->savres_define(symtab, | |
6140 | "._restf", 14, 31, | |
6141 | restfpr<big_endian>, restfpr1_tail<big_endian>); | |
6142 | this->savres_define(symtab, | |
6143 | "_savevr_", 20, 31, | |
6144 | savevr<big_endian>, savevr_tail<big_endian>); | |
6145 | this->savres_define(symtab, | |
6146 | "_restvr_", 20, 31, | |
6147 | restvr<big_endian>, restvr_tail<big_endian>); | |
6148 | } | |
6149 | ||
6150 | template<int size, bool big_endian> | |
6151 | void | |
6152 | Output_data_save_res<size, big_endian>::savres_define( | |
6153 | Symbol_table* symtab, | |
6154 | const char *name, | |
6155 | unsigned int lo, unsigned int hi, | |
6156 | unsigned char* write_ent(unsigned char*, int), | |
6157 | unsigned char* write_tail(unsigned char*, int)) | |
6158 | { | |
6159 | size_t len = strlen(name); | |
6160 | bool writing = false; | |
6161 | char sym[16]; | |
6162 | ||
6163 | memcpy(sym, name, len); | |
6164 | sym[len + 2] = 0; | |
6165 | ||
6166 | for (unsigned int i = lo; i <= hi; i++) | |
6167 | { | |
6168 | sym[len + 0] = i / 10 + '0'; | |
6169 | sym[len + 1] = i % 10 + '0'; | |
6170 | Symbol* gsym = symtab->lookup(sym); | |
6171 | bool refd = gsym != NULL && gsym->is_undefined(); | |
6172 | writing = writing || refd; | |
6173 | if (writing) | |
6174 | { | |
6175 | if (this->contents_ == NULL) | |
6176 | this->contents_ = new unsigned char[this->savres_max]; | |
6177 | ||
ec661b9d | 6178 | section_size_type value = this->current_data_size(); |
f3a0ed29 AM |
6179 | unsigned char* p = this->contents_ + value; |
6180 | if (i != hi) | |
6181 | p = write_ent(p, i); | |
6182 | else | |
6183 | p = write_tail(p, i); | |
ec661b9d | 6184 | section_size_type cur_size = p - this->contents_; |
f3a0ed29 AM |
6185 | this->set_current_data_size(cur_size); |
6186 | if (refd) | |
6187 | symtab->define_in_output_data(sym, NULL, Symbol_table::PREDEFINED, | |
6188 | this, value, cur_size - value, | |
6189 | elfcpp::STT_FUNC, elfcpp::STB_GLOBAL, | |
6190 | elfcpp::STV_HIDDEN, 0, false, false); | |
6191 | } | |
6192 | } | |
6193 | } | |
6194 | ||
6195 | // Write out save/restore. | |
6196 | ||
6197 | template<int size, bool big_endian> | |
6198 | void | |
6199 | Output_data_save_res<size, big_endian>::do_write(Output_file* of) | |
6200 | { | |
ec661b9d | 6201 | const section_size_type off = this->offset(); |
f3a0ed29 AM |
6202 | const section_size_type oview_size = |
6203 | convert_to_section_size_type(this->data_size()); | |
6204 | unsigned char* const oview = of->get_output_view(off, oview_size); | |
6205 | memcpy(oview, this->contents_, oview_size); | |
6206 | of->write_output_view(off, oview_size, oview); | |
6207 | } | |
6208 | ||
6209 | ||
cf43a2fe | 6210 | // Create the glink section. |
42cacb20 | 6211 | |
cf43a2fe AM |
6212 | template<int size, bool big_endian> |
6213 | void | |
6214 | Target_powerpc<size, big_endian>::make_glink_section(Layout* layout) | |
6215 | { | |
6216 | if (this->glink_ == NULL) | |
6217 | { | |
6218 | this->glink_ = new Output_data_glink<size, big_endian>(this); | |
9d5781f8 | 6219 | this->glink_->add_eh_frame(layout); |
cf43a2fe AM |
6220 | layout->add_output_section_data(".text", elfcpp::SHT_PROGBITS, |
6221 | elfcpp::SHF_ALLOC | elfcpp::SHF_EXECINSTR, | |
6222 | this->glink_, ORDER_TEXT, false); | |
6223 | } | |
42cacb20 DE |
6224 | } |
6225 | ||
6226 | // Create a PLT entry for a global symbol. | |
6227 | ||
6228 | template<int size, bool big_endian> | |
6229 | void | |
ec661b9d AM |
6230 | Target_powerpc<size, big_endian>::make_plt_entry(Symbol_table* symtab, |
6231 | Layout* layout, | |
6232 | Symbol* gsym) | |
42cacb20 | 6233 | { |
e5d5f5ed AM |
6234 | if (gsym->type() == elfcpp::STT_GNU_IFUNC |
6235 | && gsym->can_use_relative_reloc(false)) | |
6236 | { | |
6237 | if (this->iplt_ == NULL) | |
40b469d7 | 6238 | this->make_iplt_section(symtab, layout); |
03e25981 | 6239 | this->iplt_->add_ifunc_entry(gsym); |
e5d5f5ed AM |
6240 | } |
6241 | else | |
6242 | { | |
6243 | if (this->plt_ == NULL) | |
40b469d7 | 6244 | this->make_plt_section(symtab, layout); |
03e25981 | 6245 | this->plt_->add_entry(gsym); |
e5d5f5ed | 6246 | } |
e5d5f5ed | 6247 | } |
42cacb20 | 6248 | |
2d7ad24e AM |
6249 | // Make a PLT entry for a local symbol. |
6250 | ||
6251 | template<int size, bool big_endian> | |
6252 | void | |
6253 | Target_powerpc<size, big_endian>::make_local_plt_entry( | |
6254 | Layout* layout, | |
6255 | Sized_relobj_file<size, big_endian>* relobj, | |
6256 | unsigned int r_sym) | |
6257 | { | |
6258 | if (this->lplt_ == NULL) | |
6259 | this->make_lplt_section(layout); | |
6260 | this->lplt_->add_local_entry(relobj, r_sym); | |
6261 | } | |
6262 | ||
e5d5f5ed | 6263 | // Make a PLT entry for a local STT_GNU_IFUNC symbol. |
612a8d3d | 6264 | |
e5d5f5ed AM |
6265 | template<int size, bool big_endian> |
6266 | void | |
6267 | Target_powerpc<size, big_endian>::make_local_ifunc_plt_entry( | |
40b469d7 | 6268 | Symbol_table* symtab, |
e5d5f5ed | 6269 | Layout* layout, |
ec661b9d AM |
6270 | Sized_relobj_file<size, big_endian>* relobj, |
6271 | unsigned int r_sym) | |
e5d5f5ed AM |
6272 | { |
6273 | if (this->iplt_ == NULL) | |
40b469d7 | 6274 | this->make_iplt_section(symtab, layout); |
03e25981 | 6275 | this->iplt_->add_local_ifunc_entry(relobj, r_sym); |
42cacb20 DE |
6276 | } |
6277 | ||
0e70b911 CC |
6278 | // Return the number of entries in the PLT. |
6279 | ||
6280 | template<int size, bool big_endian> | |
6281 | unsigned int | |
6282 | Target_powerpc<size, big_endian>::plt_entry_count() const | |
6283 | { | |
6284 | if (this->plt_ == NULL) | |
6285 | return 0; | |
b3ccdeb5 | 6286 | return this->plt_->entry_count(); |
0e70b911 CC |
6287 | } |
6288 | ||
dd93cd0a | 6289 | // Create a GOT entry for local dynamic __tls_get_addr calls. |
42cacb20 DE |
6290 | |
6291 | template<int size, bool big_endian> | |
6292 | unsigned int | |
dd93cd0a | 6293 | Target_powerpc<size, big_endian>::tlsld_got_offset( |
6fa2a40b CC |
6294 | Symbol_table* symtab, |
6295 | Layout* layout, | |
6296 | Sized_relobj_file<size, big_endian>* object) | |
42cacb20 | 6297 | { |
dd93cd0a | 6298 | if (this->tlsld_got_offset_ == -1U) |
42cacb20 DE |
6299 | { |
6300 | gold_assert(symtab != NULL && layout != NULL && object != NULL); | |
6301 | Reloc_section* rela_dyn = this->rela_dyn_section(layout); | |
dd93cd0a AM |
6302 | Output_data_got_powerpc<size, big_endian>* got |
6303 | = this->got_section(symtab, layout); | |
6304 | unsigned int got_offset = got->add_constant_pair(0, 0); | |
42cacb20 DE |
6305 | rela_dyn->add_local(object, 0, elfcpp::R_POWERPC_DTPMOD, got, |
6306 | got_offset, 0); | |
dd93cd0a | 6307 | this->tlsld_got_offset_ = got_offset; |
42cacb20 | 6308 | } |
dd93cd0a | 6309 | return this->tlsld_got_offset_; |
42cacb20 DE |
6310 | } |
6311 | ||
95a2c8d6 RS |
6312 | // Get the Reference_flags for a particular relocation. |
6313 | ||
6314 | template<int size, bool big_endian> | |
6315 | int | |
88b8e639 AM |
6316 | Target_powerpc<size, big_endian>::Scan::get_reference_flags( |
6317 | unsigned int r_type, | |
6318 | const Target_powerpc* target) | |
95a2c8d6 | 6319 | { |
88b8e639 AM |
6320 | int ref = 0; |
6321 | ||
95a2c8d6 RS |
6322 | switch (r_type) |
6323 | { | |
6324 | case elfcpp::R_POWERPC_NONE: | |
6325 | case elfcpp::R_POWERPC_GNU_VTINHERIT: | |
6326 | case elfcpp::R_POWERPC_GNU_VTENTRY: | |
6327 | case elfcpp::R_PPC64_TOC: | |
6328 | // No symbol reference. | |
88b8e639 | 6329 | break; |
95a2c8d6 | 6330 | |
dd93cd0a AM |
6331 | case elfcpp::R_PPC64_ADDR64: |
6332 | case elfcpp::R_PPC64_UADDR64: | |
6333 | case elfcpp::R_POWERPC_ADDR32: | |
6334 | case elfcpp::R_POWERPC_UADDR32: | |
95a2c8d6 | 6335 | case elfcpp::R_POWERPC_ADDR16: |
dd93cd0a | 6336 | case elfcpp::R_POWERPC_UADDR16: |
95a2c8d6 RS |
6337 | case elfcpp::R_POWERPC_ADDR16_LO: |
6338 | case elfcpp::R_POWERPC_ADDR16_HI: | |
6339 | case elfcpp::R_POWERPC_ADDR16_HA: | |
88b8e639 AM |
6340 | ref = Symbol::ABSOLUTE_REF; |
6341 | break; | |
95a2c8d6 | 6342 | |
dd93cd0a AM |
6343 | case elfcpp::R_POWERPC_ADDR24: |
6344 | case elfcpp::R_POWERPC_ADDR14: | |
6345 | case elfcpp::R_POWERPC_ADDR14_BRTAKEN: | |
6346 | case elfcpp::R_POWERPC_ADDR14_BRNTAKEN: | |
88b8e639 AM |
6347 | ref = Symbol::FUNCTION_CALL | Symbol::ABSOLUTE_REF; |
6348 | break; | |
dd93cd0a | 6349 | |
e5d5f5ed | 6350 | case elfcpp::R_PPC64_REL64: |
dd93cd0a | 6351 | case elfcpp::R_POWERPC_REL32: |
95a2c8d6 | 6352 | case elfcpp::R_PPC_LOCAL24PC: |
6ce78956 AM |
6353 | case elfcpp::R_POWERPC_REL16: |
6354 | case elfcpp::R_POWERPC_REL16_LO: | |
6355 | case elfcpp::R_POWERPC_REL16_HI: | |
6356 | case elfcpp::R_POWERPC_REL16_HA: | |
88b8e639 AM |
6357 | ref = Symbol::RELATIVE_REF; |
6358 | break; | |
95a2c8d6 | 6359 | |
dd93cd0a | 6360 | case elfcpp::R_POWERPC_REL24: |
95a2c8d6 | 6361 | case elfcpp::R_PPC_PLTREL24: |
dd93cd0a AM |
6362 | case elfcpp::R_POWERPC_REL14: |
6363 | case elfcpp::R_POWERPC_REL14_BRTAKEN: | |
6364 | case elfcpp::R_POWERPC_REL14_BRNTAKEN: | |
88b8e639 AM |
6365 | ref = Symbol::FUNCTION_CALL | Symbol::RELATIVE_REF; |
6366 | break; | |
95a2c8d6 RS |
6367 | |
6368 | case elfcpp::R_POWERPC_GOT16: | |
6369 | case elfcpp::R_POWERPC_GOT16_LO: | |
6370 | case elfcpp::R_POWERPC_GOT16_HI: | |
6371 | case elfcpp::R_POWERPC_GOT16_HA: | |
e5d5f5ed AM |
6372 | case elfcpp::R_PPC64_GOT16_DS: |
6373 | case elfcpp::R_PPC64_GOT16_LO_DS: | |
95a2c8d6 RS |
6374 | case elfcpp::R_PPC64_TOC16: |
6375 | case elfcpp::R_PPC64_TOC16_LO: | |
6376 | case elfcpp::R_PPC64_TOC16_HI: | |
6377 | case elfcpp::R_PPC64_TOC16_HA: | |
6378 | case elfcpp::R_PPC64_TOC16_DS: | |
6379 | case elfcpp::R_PPC64_TOC16_LO_DS: | |
08be3224 AM |
6380 | case elfcpp::R_POWERPC_PLT16_LO: |
6381 | case elfcpp::R_POWERPC_PLT16_HI: | |
6382 | case elfcpp::R_POWERPC_PLT16_HA: | |
6383 | case elfcpp::R_PPC64_PLT16_LO_DS: | |
32d849b3 | 6384 | ref = Symbol::RELATIVE_REF; |
88b8e639 | 6385 | break; |
95a2c8d6 RS |
6386 | |
6387 | case elfcpp::R_POWERPC_GOT_TPREL16: | |
6388 | case elfcpp::R_POWERPC_TLS: | |
88b8e639 AM |
6389 | ref = Symbol::TLS_REF; |
6390 | break; | |
95a2c8d6 RS |
6391 | |
6392 | case elfcpp::R_POWERPC_COPY: | |
6393 | case elfcpp::R_POWERPC_GLOB_DAT: | |
6394 | case elfcpp::R_POWERPC_JMP_SLOT: | |
6395 | case elfcpp::R_POWERPC_RELATIVE: | |
6396 | case elfcpp::R_POWERPC_DTPMOD: | |
6397 | default: | |
6398 | // Not expected. We will give an error later. | |
88b8e639 | 6399 | break; |
95a2c8d6 | 6400 | } |
88b8e639 AM |
6401 | |
6402 | if (size == 64 && target->abiversion() < 2) | |
6403 | ref |= Symbol::FUNC_DESC_ABI; | |
6404 | return ref; | |
95a2c8d6 RS |
6405 | } |
6406 | ||
42cacb20 DE |
6407 | // Report an unsupported relocation against a local symbol. |
6408 | ||
6409 | template<int size, bool big_endian> | |
6410 | void | |
6411 | Target_powerpc<size, big_endian>::Scan::unsupported_reloc_local( | |
d83ce4e3 AM |
6412 | Sized_relobj_file<size, big_endian>* object, |
6413 | unsigned int r_type) | |
42cacb20 DE |
6414 | { |
6415 | gold_error(_("%s: unsupported reloc %u against local symbol"), | |
6416 | object->name().c_str(), r_type); | |
6417 | } | |
6418 | ||
6419 | // We are about to emit a dynamic relocation of type R_TYPE. If the | |
6420 | // dynamic linker does not support it, issue an error. | |
6421 | ||
6422 | template<int size, bool big_endian> | |
6423 | void | |
6424 | Target_powerpc<size, big_endian>::Scan::check_non_pic(Relobj* object, | |
6425 | unsigned int r_type) | |
6426 | { | |
6427 | gold_assert(r_type != elfcpp::R_POWERPC_NONE); | |
6428 | ||
6429 | // These are the relocation types supported by glibc for both 32-bit | |
6430 | // and 64-bit powerpc. | |
6431 | switch (r_type) | |
6432 | { | |
3ea0a085 | 6433 | case elfcpp::R_POWERPC_NONE: |
42cacb20 DE |
6434 | case elfcpp::R_POWERPC_RELATIVE: |
6435 | case elfcpp::R_POWERPC_GLOB_DAT: | |
6436 | case elfcpp::R_POWERPC_DTPMOD: | |
6437 | case elfcpp::R_POWERPC_DTPREL: | |
6438 | case elfcpp::R_POWERPC_TPREL: | |
6439 | case elfcpp::R_POWERPC_JMP_SLOT: | |
6440 | case elfcpp::R_POWERPC_COPY: | |
3ea0a085 | 6441 | case elfcpp::R_POWERPC_IRELATIVE: |
42cacb20 | 6442 | case elfcpp::R_POWERPC_ADDR32: |
3ea0a085 | 6443 | case elfcpp::R_POWERPC_UADDR32: |
42cacb20 | 6444 | case elfcpp::R_POWERPC_ADDR24: |
3ea0a085 AM |
6445 | case elfcpp::R_POWERPC_ADDR16: |
6446 | case elfcpp::R_POWERPC_UADDR16: | |
6447 | case elfcpp::R_POWERPC_ADDR16_LO: | |
6448 | case elfcpp::R_POWERPC_ADDR16_HI: | |
6449 | case elfcpp::R_POWERPC_ADDR16_HA: | |
6450 | case elfcpp::R_POWERPC_ADDR14: | |
6451 | case elfcpp::R_POWERPC_ADDR14_BRTAKEN: | |
6452 | case elfcpp::R_POWERPC_ADDR14_BRNTAKEN: | |
6453 | case elfcpp::R_POWERPC_REL32: | |
42cacb20 | 6454 | case elfcpp::R_POWERPC_REL24: |
3ea0a085 AM |
6455 | case elfcpp::R_POWERPC_TPREL16: |
6456 | case elfcpp::R_POWERPC_TPREL16_LO: | |
6457 | case elfcpp::R_POWERPC_TPREL16_HI: | |
6458 | case elfcpp::R_POWERPC_TPREL16_HA: | |
42cacb20 DE |
6459 | return; |
6460 | ||
6461 | default: | |
6462 | break; | |
6463 | } | |
6464 | ||
6465 | if (size == 64) | |
6466 | { | |
6467 | switch (r_type) | |
6468 | { | |
6469 | // These are the relocation types supported only on 64-bit. | |
6470 | case elfcpp::R_PPC64_ADDR64: | |
42cacb20 | 6471 | case elfcpp::R_PPC64_UADDR64: |
3ea0a085 | 6472 | case elfcpp::R_PPC64_JMP_IREL: |
42cacb20 | 6473 | case elfcpp::R_PPC64_ADDR16_DS: |
3ea0a085 | 6474 | case elfcpp::R_PPC64_ADDR16_LO_DS: |
f9c6b907 AM |
6475 | case elfcpp::R_PPC64_ADDR16_HIGH: |
6476 | case elfcpp::R_PPC64_ADDR16_HIGHA: | |
42cacb20 DE |
6477 | case elfcpp::R_PPC64_ADDR16_HIGHER: |
6478 | case elfcpp::R_PPC64_ADDR16_HIGHEST: | |
6479 | case elfcpp::R_PPC64_ADDR16_HIGHERA: | |
6480 | case elfcpp::R_PPC64_ADDR16_HIGHESTA: | |
42cacb20 | 6481 | case elfcpp::R_PPC64_REL64: |
3ea0a085 AM |
6482 | case elfcpp::R_POWERPC_ADDR30: |
6483 | case elfcpp::R_PPC64_TPREL16_DS: | |
6484 | case elfcpp::R_PPC64_TPREL16_LO_DS: | |
f9c6b907 AM |
6485 | case elfcpp::R_PPC64_TPREL16_HIGH: |
6486 | case elfcpp::R_PPC64_TPREL16_HIGHA: | |
3ea0a085 AM |
6487 | case elfcpp::R_PPC64_TPREL16_HIGHER: |
6488 | case elfcpp::R_PPC64_TPREL16_HIGHEST: | |
6489 | case elfcpp::R_PPC64_TPREL16_HIGHERA: | |
6490 | case elfcpp::R_PPC64_TPREL16_HIGHESTA: | |
42cacb20 DE |
6491 | return; |
6492 | ||
6493 | default: | |
6494 | break; | |
6495 | } | |
6496 | } | |
6497 | else | |
6498 | { | |
6499 | switch (r_type) | |
6500 | { | |
6501 | // These are the relocation types supported only on 32-bit. | |
3ea0a085 AM |
6502 | // ??? glibc ld.so doesn't need to support these. |
6503 | case elfcpp::R_POWERPC_DTPREL16: | |
6504 | case elfcpp::R_POWERPC_DTPREL16_LO: | |
6505 | case elfcpp::R_POWERPC_DTPREL16_HI: | |
6506 | case elfcpp::R_POWERPC_DTPREL16_HA: | |
6507 | return; | |
42cacb20 DE |
6508 | |
6509 | default: | |
6510 | break; | |
6511 | } | |
6512 | } | |
6513 | ||
6514 | // This prevents us from issuing more than one error per reloc | |
6515 | // section. But we can still wind up issuing more than one | |
6516 | // error per object file. | |
6517 | if (this->issued_non_pic_error_) | |
6518 | return; | |
33aea2fd | 6519 | gold_assert(parameters->options().output_is_position_independent()); |
42cacb20 DE |
6520 | object->error(_("requires unsupported dynamic reloc; " |
6521 | "recompile with -fPIC")); | |
6522 | this->issued_non_pic_error_ = true; | |
6523 | return; | |
6524 | } | |
6525 | ||
e5d5f5ed AM |
6526 | // Return whether we need to make a PLT entry for a relocation of the |
6527 | // given type against a STT_GNU_IFUNC symbol. | |
6528 | ||
6529 | template<int size, bool big_endian> | |
6530 | bool | |
6531 | Target_powerpc<size, big_endian>::Scan::reloc_needs_plt_for_ifunc( | |
9055360d | 6532 | Target_powerpc<size, big_endian>* target, |
e5d5f5ed | 6533 | Sized_relobj_file<size, big_endian>* object, |
b3ccdeb5 AM |
6534 | unsigned int r_type, |
6535 | bool report_err) | |
e5d5f5ed | 6536 | { |
c9824451 AM |
6537 | // In non-pic code any reference will resolve to the plt call stub |
6538 | // for the ifunc symbol. | |
9055360d AM |
6539 | if ((size == 32 || target->abiversion() >= 2) |
6540 | && !parameters->options().output_is_position_independent()) | |
c9824451 AM |
6541 | return true; |
6542 | ||
e5d5f5ed AM |
6543 | switch (r_type) |
6544 | { | |
b3ccdeb5 | 6545 | // Word size refs from data sections are OK, but don't need a PLT entry. |
e5d5f5ed AM |
6546 | case elfcpp::R_POWERPC_ADDR32: |
6547 | case elfcpp::R_POWERPC_UADDR32: | |
6548 | if (size == 32) | |
b3ccdeb5 | 6549 | return false; |
e5d5f5ed AM |
6550 | break; |
6551 | ||
6552 | case elfcpp::R_PPC64_ADDR64: | |
6553 | case elfcpp::R_PPC64_UADDR64: | |
6554 | if (size == 64) | |
b3ccdeb5 | 6555 | return false; |
e5d5f5ed AM |
6556 | break; |
6557 | ||
b3ccdeb5 | 6558 | // GOT refs are good, but also don't need a PLT entry. |
e5d5f5ed AM |
6559 | case elfcpp::R_POWERPC_GOT16: |
6560 | case elfcpp::R_POWERPC_GOT16_LO: | |
6561 | case elfcpp::R_POWERPC_GOT16_HI: | |
6562 | case elfcpp::R_POWERPC_GOT16_HA: | |
6563 | case elfcpp::R_PPC64_GOT16_DS: | |
6564 | case elfcpp::R_PPC64_GOT16_LO_DS: | |
b3ccdeb5 | 6565 | return false; |
e5d5f5ed | 6566 | |
08be3224 AM |
6567 | // PLT relocs are OK and need a PLT entry. |
6568 | case elfcpp::R_POWERPC_PLT16_LO: | |
6569 | case elfcpp::R_POWERPC_PLT16_HI: | |
6570 | case elfcpp::R_POWERPC_PLT16_HA: | |
6571 | case elfcpp::R_PPC64_PLT16_LO_DS: | |
6572 | return true; | |
6573 | break; | |
6574 | ||
b3ccdeb5 | 6575 | // Function calls are good, and these do need a PLT entry. |
e5d5f5ed AM |
6576 | case elfcpp::R_POWERPC_ADDR24: |
6577 | case elfcpp::R_POWERPC_ADDR14: | |
6578 | case elfcpp::R_POWERPC_ADDR14_BRTAKEN: | |
6579 | case elfcpp::R_POWERPC_ADDR14_BRNTAKEN: | |
6580 | case elfcpp::R_POWERPC_REL24: | |
6581 | case elfcpp::R_PPC_PLTREL24: | |
6582 | case elfcpp::R_POWERPC_REL14: | |
6583 | case elfcpp::R_POWERPC_REL14_BRTAKEN: | |
6584 | case elfcpp::R_POWERPC_REL14_BRNTAKEN: | |
6585 | return true; | |
6586 | ||
6587 | default: | |
6588 | break; | |
6589 | } | |
6590 | ||
6591 | // Anything else is a problem. | |
6592 | // If we are building a static executable, the libc startup function | |
6593 | // responsible for applying indirect function relocations is going | |
6594 | // to complain about the reloc type. | |
6595 | // If we are building a dynamic executable, we will have a text | |
6596 | // relocation. The dynamic loader will set the text segment | |
6597 | // writable and non-executable to apply text relocations. So we'll | |
6598 | // segfault when trying to run the indirection function to resolve | |
6599 | // the reloc. | |
b3ccdeb5 AM |
6600 | if (report_err) |
6601 | gold_error(_("%s: unsupported reloc %u for IFUNC symbol"), | |
e5d5f5ed AM |
6602 | object->name().c_str(), r_type); |
6603 | return false; | |
6604 | } | |
6605 | ||
5edad15d AM |
6606 | // Return TRUE iff INSN is one we expect on a _LO variety toc/got |
6607 | // reloc. | |
6608 | ||
6609 | static bool | |
6610 | ok_lo_toc_insn(uint32_t insn, unsigned int r_type) | |
6611 | { | |
6612 | return ((insn & (0x3f << 26)) == 12u << 26 /* addic */ | |
6613 | || (insn & (0x3f << 26)) == 14u << 26 /* addi */ | |
6614 | || (insn & (0x3f << 26)) == 32u << 26 /* lwz */ | |
6615 | || (insn & (0x3f << 26)) == 34u << 26 /* lbz */ | |
6616 | || (insn & (0x3f << 26)) == 36u << 26 /* stw */ | |
6617 | || (insn & (0x3f << 26)) == 38u << 26 /* stb */ | |
6618 | || (insn & (0x3f << 26)) == 40u << 26 /* lhz */ | |
6619 | || (insn & (0x3f << 26)) == 42u << 26 /* lha */ | |
6620 | || (insn & (0x3f << 26)) == 44u << 26 /* sth */ | |
6621 | || (insn & (0x3f << 26)) == 46u << 26 /* lmw */ | |
6622 | || (insn & (0x3f << 26)) == 47u << 26 /* stmw */ | |
6623 | || (insn & (0x3f << 26)) == 48u << 26 /* lfs */ | |
6624 | || (insn & (0x3f << 26)) == 50u << 26 /* lfd */ | |
6625 | || (insn & (0x3f << 26)) == 52u << 26 /* stfs */ | |
6626 | || (insn & (0x3f << 26)) == 54u << 26 /* stfd */ | |
6627 | || (insn & (0x3f << 26)) == 56u << 26 /* lq,lfq */ | |
6628 | || ((insn & (0x3f << 26)) == 57u << 26 /* lxsd,lxssp,lfdp */ | |
6629 | /* Exclude lfqu by testing reloc. If relocs are ever | |
6630 | defined for the reduced D field in psq_lu then those | |
6631 | will need testing too. */ | |
6632 | && r_type != elfcpp::R_PPC64_TOC16_LO | |
6633 | && r_type != elfcpp::R_POWERPC_GOT16_LO) | |
6634 | || ((insn & (0x3f << 26)) == 58u << 26 /* ld,lwa */ | |
6635 | && (insn & 1) == 0) | |
6636 | || (insn & (0x3f << 26)) == 60u << 26 /* stfq */ | |
6637 | || ((insn & (0x3f << 26)) == 61u << 26 /* lxv,stx{v,sd,ssp},stfdp */ | |
6638 | /* Exclude stfqu. psq_stu as above for psq_lu. */ | |
6639 | && r_type != elfcpp::R_PPC64_TOC16_LO | |
6640 | && r_type != elfcpp::R_POWERPC_GOT16_LO) | |
6641 | || ((insn & (0x3f << 26)) == 62u << 26 /* std,stq */ | |
6642 | && (insn & 1) == 0)); | |
6643 | } | |
6644 | ||
42cacb20 DE |
6645 | // Scan a relocation for a local symbol. |
6646 | ||
6647 | template<int size, bool big_endian> | |
6648 | inline void | |
6649 | Target_powerpc<size, big_endian>::Scan::local( | |
d83ce4e3 AM |
6650 | Symbol_table* symtab, |
6651 | Layout* layout, | |
6652 | Target_powerpc<size, big_endian>* target, | |
6653 | Sized_relobj_file<size, big_endian>* object, | |
6654 | unsigned int data_shndx, | |
6655 | Output_section* output_section, | |
6656 | const elfcpp::Rela<size, big_endian>& reloc, | |
6657 | unsigned int r_type, | |
e5d5f5ed | 6658 | const elfcpp::Sym<size, big_endian>& lsym, |
bfdfa4cd | 6659 | bool is_discarded) |
42cacb20 | 6660 | { |
34e0882b | 6661 | this->maybe_skip_tls_get_addr_call(target, r_type, NULL); |
e3deeb9c AM |
6662 | |
6663 | if ((size == 64 && r_type == elfcpp::R_PPC64_TLSGD) | |
6664 | || (size == 32 && r_type == elfcpp::R_PPC_TLSGD)) | |
6665 | { | |
6666 | this->expect_tls_get_addr_call(); | |
6667 | const tls::Tls_optimization tls_type = target->optimize_tls_gd(true); | |
6668 | if (tls_type != tls::TLSOPT_NONE) | |
6669 | this->skip_next_tls_get_addr_call(); | |
6670 | } | |
6671 | else if ((size == 64 && r_type == elfcpp::R_PPC64_TLSLD) | |
6672 | || (size == 32 && r_type == elfcpp::R_PPC_TLSLD)) | |
6673 | { | |
6674 | this->expect_tls_get_addr_call(); | |
6675 | const tls::Tls_optimization tls_type = target->optimize_tls_ld(); | |
6676 | if (tls_type != tls::TLSOPT_NONE) | |
6677 | this->skip_next_tls_get_addr_call(); | |
6678 | } | |
6679 | ||
dd93cd0a AM |
6680 | Powerpc_relobj<size, big_endian>* ppc_object |
6681 | = static_cast<Powerpc_relobj<size, big_endian>*>(object); | |
6682 | ||
bfdfa4cd AM |
6683 | if (is_discarded) |
6684 | { | |
6685 | if (size == 64 | |
6686 | && data_shndx == ppc_object->opd_shndx() | |
6687 | && r_type == elfcpp::R_PPC64_ADDR64) | |
6688 | ppc_object->set_opd_discard(reloc.get_r_offset()); | |
6689 | return; | |
6690 | } | |
6691 | ||
e5d5f5ed AM |
6692 | // A local STT_GNU_IFUNC symbol may require a PLT entry. |
6693 | bool is_ifunc = lsym.get_st_type() == elfcpp::STT_GNU_IFUNC; | |
9055360d | 6694 | if (is_ifunc && this->reloc_needs_plt_for_ifunc(target, object, r_type, true)) |
40b469d7 | 6695 | { |
ec661b9d AM |
6696 | unsigned int r_sym = elfcpp::elf_r_sym<size>(reloc.get_r_info()); |
6697 | target->push_branch(ppc_object, data_shndx, reloc.get_r_offset(), | |
6698 | r_type, r_sym, reloc.get_r_addend()); | |
6699 | target->make_local_ifunc_plt_entry(symtab, layout, object, r_sym); | |
40b469d7 | 6700 | } |
e5d5f5ed | 6701 | |
42cacb20 DE |
6702 | switch (r_type) |
6703 | { | |
6704 | case elfcpp::R_POWERPC_NONE: | |
6705 | case elfcpp::R_POWERPC_GNU_VTINHERIT: | |
6706 | case elfcpp::R_POWERPC_GNU_VTENTRY: | |
7404fe1b | 6707 | case elfcpp::R_POWERPC_TLS: |
549dba71 | 6708 | case elfcpp::R_PPC64_ENTRY: |
dd93cd0a AM |
6709 | break; |
6710 | ||
6711 | case elfcpp::R_PPC64_TOC: | |
6712 | { | |
6713 | Output_data_got_powerpc<size, big_endian>* got | |
6714 | = target->got_section(symtab, layout); | |
6715 | if (parameters->options().output_is_position_independent()) | |
6716 | { | |
bfdfa4cd AM |
6717 | Address off = reloc.get_r_offset(); |
6718 | if (size == 64 | |
9055360d | 6719 | && target->abiversion() < 2 |
bfdfa4cd AM |
6720 | && data_shndx == ppc_object->opd_shndx() |
6721 | && ppc_object->get_opd_discard(off - 8)) | |
6722 | break; | |
6723 | ||
dd93cd0a | 6724 | Reloc_section* rela_dyn = target->rela_dyn_section(layout); |
bfdfa4cd | 6725 | Powerpc_relobj<size, big_endian>* symobj = ppc_object; |
dd93cd0a AM |
6726 | rela_dyn->add_output_section_relative(got->output_section(), |
6727 | elfcpp::R_POWERPC_RELATIVE, | |
6728 | output_section, | |
bfdfa4cd AM |
6729 | object, data_shndx, off, |
6730 | symobj->toc_base_offset()); | |
dd93cd0a AM |
6731 | } |
6732 | } | |
42cacb20 DE |
6733 | break; |
6734 | ||
6735 | case elfcpp::R_PPC64_ADDR64: | |
dd93cd0a | 6736 | case elfcpp::R_PPC64_UADDR64: |
42cacb20 | 6737 | case elfcpp::R_POWERPC_ADDR32: |
dd93cd0a AM |
6738 | case elfcpp::R_POWERPC_UADDR32: |
6739 | case elfcpp::R_POWERPC_ADDR24: | |
c9269dff | 6740 | case elfcpp::R_POWERPC_ADDR16: |
42cacb20 | 6741 | case elfcpp::R_POWERPC_ADDR16_LO: |
c9269dff AM |
6742 | case elfcpp::R_POWERPC_ADDR16_HI: |
6743 | case elfcpp::R_POWERPC_ADDR16_HA: | |
dd93cd0a | 6744 | case elfcpp::R_POWERPC_UADDR16: |
f9c6b907 AM |
6745 | case elfcpp::R_PPC64_ADDR16_HIGH: |
6746 | case elfcpp::R_PPC64_ADDR16_HIGHA: | |
dd93cd0a AM |
6747 | case elfcpp::R_PPC64_ADDR16_HIGHER: |
6748 | case elfcpp::R_PPC64_ADDR16_HIGHERA: | |
6749 | case elfcpp::R_PPC64_ADDR16_HIGHEST: | |
6750 | case elfcpp::R_PPC64_ADDR16_HIGHESTA: | |
6751 | case elfcpp::R_PPC64_ADDR16_DS: | |
6752 | case elfcpp::R_PPC64_ADDR16_LO_DS: | |
6753 | case elfcpp::R_POWERPC_ADDR14: | |
6754 | case elfcpp::R_POWERPC_ADDR14_BRTAKEN: | |
6755 | case elfcpp::R_POWERPC_ADDR14_BRNTAKEN: | |
42cacb20 DE |
6756 | // If building a shared library (or a position-independent |
6757 | // executable), we need to create a dynamic relocation for | |
6758 | // this location. | |
c9824451 | 6759 | if (parameters->options().output_is_position_independent() |
9055360d | 6760 | || (size == 64 && is_ifunc && target->abiversion() < 2)) |
2e702c99 | 6761 | { |
b3ccdeb5 AM |
6762 | Reloc_section* rela_dyn = target->rela_dyn_section(symtab, layout, |
6763 | is_ifunc); | |
1f98a074 | 6764 | unsigned int r_sym = elfcpp::elf_r_sym<size>(reloc.get_r_info()); |
dd93cd0a AM |
6765 | if ((size == 32 && r_type == elfcpp::R_POWERPC_ADDR32) |
6766 | || (size == 64 && r_type == elfcpp::R_PPC64_ADDR64)) | |
2e702c99 | 6767 | { |
b3ccdeb5 AM |
6768 | unsigned int dynrel = (is_ifunc ? elfcpp::R_POWERPC_IRELATIVE |
6769 | : elfcpp::R_POWERPC_RELATIVE); | |
e5d5f5ed | 6770 | rela_dyn->add_local_relative(object, r_sym, dynrel, |
dd93cd0a AM |
6771 | output_section, data_shndx, |
6772 | reloc.get_r_offset(), | |
c9824451 | 6773 | reloc.get_r_addend(), false); |
2e702c99 | 6774 | } |
1f98a074 | 6775 | else if (lsym.get_st_type() != elfcpp::STT_SECTION) |
2e702c99 | 6776 | { |
dd93cd0a | 6777 | check_non_pic(object, r_type); |
dd93cd0a AM |
6778 | rela_dyn->add_local(object, r_sym, r_type, output_section, |
6779 | data_shndx, reloc.get_r_offset(), | |
6780 | reloc.get_r_addend()); | |
2e702c99 | 6781 | } |
1f98a074 AM |
6782 | else |
6783 | { | |
6784 | gold_assert(lsym.get_st_value() == 0); | |
6785 | unsigned int shndx = lsym.get_st_shndx(); | |
6786 | bool is_ordinary; | |
6787 | shndx = object->adjust_sym_shndx(r_sym, shndx, | |
6788 | &is_ordinary); | |
6789 | if (!is_ordinary) | |
6790 | object->error(_("section symbol %u has bad shndx %u"), | |
6791 | r_sym, shndx); | |
6792 | else | |
6793 | rela_dyn->add_local_section(object, shndx, r_type, | |
6794 | output_section, data_shndx, | |
6795 | reloc.get_r_offset()); | |
6796 | } | |
2e702c99 | 6797 | } |
42cacb20 DE |
6798 | break; |
6799 | ||
2d7ad24e AM |
6800 | case elfcpp::R_POWERPC_PLT16_LO: |
6801 | case elfcpp::R_POWERPC_PLT16_HI: | |
6802 | case elfcpp::R_POWERPC_PLT16_HA: | |
6803 | case elfcpp::R_PPC64_PLT16_LO_DS: | |
6804 | if (!is_ifunc) | |
6805 | { | |
6806 | unsigned int r_sym = elfcpp::elf_r_sym<size>(reloc.get_r_info()); | |
6807 | target->make_local_plt_entry(layout, object, r_sym); | |
6808 | } | |
6809 | break; | |
6810 | ||
42cacb20 | 6811 | case elfcpp::R_POWERPC_REL24: |
c9824451 | 6812 | case elfcpp::R_PPC_PLTREL24: |
42cacb20 | 6813 | case elfcpp::R_PPC_LOCAL24PC: |
ec661b9d AM |
6814 | case elfcpp::R_POWERPC_REL14: |
6815 | case elfcpp::R_POWERPC_REL14_BRTAKEN: | |
6816 | case elfcpp::R_POWERPC_REL14_BRNTAKEN: | |
b3ccdeb5 | 6817 | if (!is_ifunc) |
0e123f69 AM |
6818 | { |
6819 | unsigned int r_sym = elfcpp::elf_r_sym<size>(reloc.get_r_info()); | |
6820 | target->push_branch(ppc_object, data_shndx, reloc.get_r_offset(), | |
6821 | r_type, r_sym, reloc.get_r_addend()); | |
6822 | } | |
ec661b9d AM |
6823 | break; |
6824 | ||
7e57d19e AM |
6825 | case elfcpp::R_PPC64_TOCSAVE: |
6826 | // R_PPC64_TOCSAVE follows a call instruction to indicate the | |
6827 | // caller has already saved r2 and thus a plt call stub need not | |
6828 | // save r2. | |
6829 | if (size == 64 | |
6830 | && target->mark_pltcall(ppc_object, data_shndx, | |
6831 | reloc.get_r_offset() - 4, symtab)) | |
6832 | { | |
6833 | unsigned int r_sym = elfcpp::elf_r_sym<size>(reloc.get_r_info()); | |
6834 | unsigned int shndx = lsym.get_st_shndx(); | |
6835 | bool is_ordinary; | |
6836 | shndx = object->adjust_sym_shndx(r_sym, shndx, &is_ordinary); | |
6837 | if (!is_ordinary) | |
6838 | object->error(_("tocsave symbol %u has bad shndx %u"), | |
6839 | r_sym, shndx); | |
6840 | else | |
6841 | target->add_tocsave(ppc_object, shndx, | |
6842 | lsym.get_st_value() + reloc.get_r_addend()); | |
6843 | } | |
6844 | break; | |
6845 | ||
ec661b9d AM |
6846 | case elfcpp::R_PPC64_REL64: |
6847 | case elfcpp::R_POWERPC_REL32: | |
dd93cd0a | 6848 | case elfcpp::R_POWERPC_REL16: |
6ce78956 | 6849 | case elfcpp::R_POWERPC_REL16_LO: |
dd93cd0a | 6850 | case elfcpp::R_POWERPC_REL16_HI: |
6ce78956 | 6851 | case elfcpp::R_POWERPC_REL16_HA: |
a680de9a | 6852 | case elfcpp::R_POWERPC_REL16DX_HA: |
dd93cd0a | 6853 | case elfcpp::R_POWERPC_SECTOFF: |
dd93cd0a | 6854 | case elfcpp::R_POWERPC_SECTOFF_LO: |
dd93cd0a | 6855 | case elfcpp::R_POWERPC_SECTOFF_HI: |
dd93cd0a | 6856 | case elfcpp::R_POWERPC_SECTOFF_HA: |
f9c6b907 AM |
6857 | case elfcpp::R_PPC64_SECTOFF_DS: |
6858 | case elfcpp::R_PPC64_SECTOFF_LO_DS: | |
6859 | case elfcpp::R_POWERPC_TPREL16: | |
6860 | case elfcpp::R_POWERPC_TPREL16_LO: | |
6861 | case elfcpp::R_POWERPC_TPREL16_HI: | |
dd93cd0a | 6862 | case elfcpp::R_POWERPC_TPREL16_HA: |
f9c6b907 AM |
6863 | case elfcpp::R_PPC64_TPREL16_DS: |
6864 | case elfcpp::R_PPC64_TPREL16_LO_DS: | |
6865 | case elfcpp::R_PPC64_TPREL16_HIGH: | |
6866 | case elfcpp::R_PPC64_TPREL16_HIGHA: | |
dd93cd0a | 6867 | case elfcpp::R_PPC64_TPREL16_HIGHER: |
dd93cd0a | 6868 | case elfcpp::R_PPC64_TPREL16_HIGHERA: |
dd93cd0a | 6869 | case elfcpp::R_PPC64_TPREL16_HIGHEST: |
dd93cd0a | 6870 | case elfcpp::R_PPC64_TPREL16_HIGHESTA: |
f9c6b907 AM |
6871 | case elfcpp::R_POWERPC_DTPREL16: |
6872 | case elfcpp::R_POWERPC_DTPREL16_LO: | |
6873 | case elfcpp::R_POWERPC_DTPREL16_HI: | |
6874 | case elfcpp::R_POWERPC_DTPREL16_HA: | |
dd93cd0a AM |
6875 | case elfcpp::R_PPC64_DTPREL16_DS: |
6876 | case elfcpp::R_PPC64_DTPREL16_LO_DS: | |
f9c6b907 AM |
6877 | case elfcpp::R_PPC64_DTPREL16_HIGH: |
6878 | case elfcpp::R_PPC64_DTPREL16_HIGHA: | |
6879 | case elfcpp::R_PPC64_DTPREL16_HIGHER: | |
6880 | case elfcpp::R_PPC64_DTPREL16_HIGHERA: | |
6881 | case elfcpp::R_PPC64_DTPREL16_HIGHEST: | |
6882 | case elfcpp::R_PPC64_DTPREL16_HIGHESTA: | |
dd93cd0a AM |
6883 | case elfcpp::R_PPC64_TLSGD: |
6884 | case elfcpp::R_PPC64_TLSLD: | |
45965137 | 6885 | case elfcpp::R_PPC64_ADDR64_LOCAL: |
42cacb20 DE |
6886 | break; |
6887 | ||
6888 | case elfcpp::R_POWERPC_GOT16: | |
6889 | case elfcpp::R_POWERPC_GOT16_LO: | |
6890 | case elfcpp::R_POWERPC_GOT16_HI: | |
6891 | case elfcpp::R_POWERPC_GOT16_HA: | |
dd93cd0a AM |
6892 | case elfcpp::R_PPC64_GOT16_DS: |
6893 | case elfcpp::R_PPC64_GOT16_LO_DS: | |
42cacb20 | 6894 | { |
c9269dff | 6895 | // The symbol requires a GOT entry. |
dd93cd0a AM |
6896 | Output_data_got_powerpc<size, big_endian>* got |
6897 | = target->got_section(symtab, layout); | |
6898 | unsigned int r_sym = elfcpp::elf_r_sym<size>(reloc.get_r_info()); | |
42cacb20 | 6899 | |
e5d5f5ed | 6900 | if (!parameters->options().output_is_position_independent()) |
42cacb20 | 6901 | { |
b01a4b04 AM |
6902 | if (is_ifunc |
6903 | && (size == 32 || target->abiversion() >= 2)) | |
e5d5f5ed AM |
6904 | got->add_local_plt(object, r_sym, GOT_TYPE_STANDARD); |
6905 | else | |
6906 | got->add_local(object, r_sym, GOT_TYPE_STANDARD); | |
6907 | } | |
6908 | else if (!object->local_has_got_offset(r_sym, GOT_TYPE_STANDARD)) | |
6909 | { | |
6910 | // If we are generating a shared object or a pie, this | |
6911 | // symbol's GOT entry will be set by a dynamic relocation. | |
6912 | unsigned int off; | |
6913 | off = got->add_constant(0); | |
6914 | object->set_local_got_offset(r_sym, GOT_TYPE_STANDARD, off); | |
42cacb20 | 6915 | |
b3ccdeb5 AM |
6916 | Reloc_section* rela_dyn = target->rela_dyn_section(symtab, layout, |
6917 | is_ifunc); | |
6918 | unsigned int dynrel = (is_ifunc ? elfcpp::R_POWERPC_IRELATIVE | |
6919 | : elfcpp::R_POWERPC_RELATIVE); | |
e5d5f5ed | 6920 | rela_dyn->add_local_relative(object, r_sym, dynrel, |
c9824451 | 6921 | got, off, 0, false); |
2e702c99 | 6922 | } |
42cacb20 DE |
6923 | } |
6924 | break; | |
6925 | ||
cf43a2fe AM |
6926 | case elfcpp::R_PPC64_TOC16: |
6927 | case elfcpp::R_PPC64_TOC16_LO: | |
6928 | case elfcpp::R_PPC64_TOC16_HI: | |
6929 | case elfcpp::R_PPC64_TOC16_HA: | |
6930 | case elfcpp::R_PPC64_TOC16_DS: | |
6931 | case elfcpp::R_PPC64_TOC16_LO_DS: | |
42cacb20 DE |
6932 | // We need a GOT section. |
6933 | target->got_section(symtab, layout); | |
6934 | break; | |
6935 | ||
dd93cd0a AM |
6936 | case elfcpp::R_POWERPC_GOT_TLSGD16: |
6937 | case elfcpp::R_POWERPC_GOT_TLSGD16_LO: | |
6938 | case elfcpp::R_POWERPC_GOT_TLSGD16_HI: | |
6939 | case elfcpp::R_POWERPC_GOT_TLSGD16_HA: | |
6940 | { | |
6941 | const tls::Tls_optimization tls_type = target->optimize_tls_gd(true); | |
6942 | if (tls_type == tls::TLSOPT_NONE) | |
6943 | { | |
6944 | Output_data_got_powerpc<size, big_endian>* got | |
6945 | = target->got_section(symtab, layout); | |
6946 | unsigned int r_sym = elfcpp::elf_r_sym<size>(reloc.get_r_info()); | |
bd73a62d AM |
6947 | Reloc_section* rela_dyn = target->rela_dyn_section(layout); |
6948 | got->add_local_tls_pair(object, r_sym, GOT_TYPE_TLSGD, | |
6949 | rela_dyn, elfcpp::R_POWERPC_DTPMOD); | |
dd93cd0a AM |
6950 | } |
6951 | else if (tls_type == tls::TLSOPT_TO_LE) | |
6952 | { | |
6953 | // no GOT relocs needed for Local Exec. | |
6954 | } | |
6955 | else | |
6956 | gold_unreachable(); | |
6957 | } | |
42cacb20 DE |
6958 | break; |
6959 | ||
dd93cd0a AM |
6960 | case elfcpp::R_POWERPC_GOT_TLSLD16: |
6961 | case elfcpp::R_POWERPC_GOT_TLSLD16_LO: | |
6962 | case elfcpp::R_POWERPC_GOT_TLSLD16_HI: | |
6963 | case elfcpp::R_POWERPC_GOT_TLSLD16_HA: | |
6964 | { | |
6965 | const tls::Tls_optimization tls_type = target->optimize_tls_ld(); | |
6966 | if (tls_type == tls::TLSOPT_NONE) | |
6967 | target->tlsld_got_offset(symtab, layout, object); | |
6968 | else if (tls_type == tls::TLSOPT_TO_LE) | |
6969 | { | |
6970 | // no GOT relocs needed for Local Exec. | |
7404fe1b AM |
6971 | if (parameters->options().emit_relocs()) |
6972 | { | |
6973 | Output_section* os = layout->tls_segment()->first_section(); | |
6974 | gold_assert(os != NULL); | |
6975 | os->set_needs_symtab_index(); | |
6976 | } | |
dd93cd0a AM |
6977 | } |
6978 | else | |
6979 | gold_unreachable(); | |
6980 | } | |
42cacb20 | 6981 | break; |
42cacb20 | 6982 | |
dd93cd0a AM |
6983 | case elfcpp::R_POWERPC_GOT_DTPREL16: |
6984 | case elfcpp::R_POWERPC_GOT_DTPREL16_LO: | |
6985 | case elfcpp::R_POWERPC_GOT_DTPREL16_HI: | |
6986 | case elfcpp::R_POWERPC_GOT_DTPREL16_HA: | |
6987 | { | |
6988 | Output_data_got_powerpc<size, big_endian>* got | |
6989 | = target->got_section(symtab, layout); | |
6990 | unsigned int r_sym = elfcpp::elf_r_sym<size>(reloc.get_r_info()); | |
bd73a62d | 6991 | got->add_local_tls(object, r_sym, GOT_TYPE_DTPREL); |
dd93cd0a AM |
6992 | } |
6993 | break; | |
42cacb20 | 6994 | |
dd93cd0a AM |
6995 | case elfcpp::R_POWERPC_GOT_TPREL16: |
6996 | case elfcpp::R_POWERPC_GOT_TPREL16_LO: | |
6997 | case elfcpp::R_POWERPC_GOT_TPREL16_HI: | |
6998 | case elfcpp::R_POWERPC_GOT_TPREL16_HA: | |
6999 | { | |
7000 | const tls::Tls_optimization tls_type = target->optimize_tls_ie(true); | |
7001 | if (tls_type == tls::TLSOPT_NONE) | |
7002 | { | |
dd93cd0a | 7003 | unsigned int r_sym = elfcpp::elf_r_sym<size>(reloc.get_r_info()); |
acc276d8 AM |
7004 | if (!object->local_has_got_offset(r_sym, GOT_TYPE_TPREL)) |
7005 | { | |
7006 | Output_data_got_powerpc<size, big_endian>* got | |
7007 | = target->got_section(symtab, layout); | |
7008 | unsigned int off = got->add_constant(0); | |
7009 | object->set_local_got_offset(r_sym, GOT_TYPE_TPREL, off); | |
7010 | ||
7011 | Reloc_section* rela_dyn = target->rela_dyn_section(layout); | |
7012 | rela_dyn->add_symbolless_local_addend(object, r_sym, | |
7013 | elfcpp::R_POWERPC_TPREL, | |
7014 | got, off, 0); | |
7015 | } | |
dd93cd0a AM |
7016 | } |
7017 | else if (tls_type == tls::TLSOPT_TO_LE) | |
7018 | { | |
7019 | // no GOT relocs needed for Local Exec. | |
7020 | } | |
7021 | else | |
7022 | gold_unreachable(); | |
7023 | } | |
7024 | break; | |
7025 | ||
7026 | default: | |
7027 | unsupported_reloc_local(object, r_type); | |
7028 | break; | |
7029 | } | |
d8f5a274 | 7030 | |
5edad15d AM |
7031 | if (size == 64 |
7032 | && parameters->options().toc_optimize()) | |
7033 | { | |
7034 | if (data_shndx == ppc_object->toc_shndx()) | |
7035 | { | |
7036 | bool ok = true; | |
7037 | if (r_type != elfcpp::R_PPC64_ADDR64 | |
7038 | || (is_ifunc && target->abiversion() < 2)) | |
7039 | ok = false; | |
7040 | else if (parameters->options().output_is_position_independent()) | |
7041 | { | |
7042 | if (is_ifunc) | |
7043 | ok = false; | |
7044 | else | |
7045 | { | |
7046 | unsigned int shndx = lsym.get_st_shndx(); | |
7047 | if (shndx >= elfcpp::SHN_LORESERVE | |
7048 | && shndx != elfcpp::SHN_XINDEX) | |
7049 | ok = false; | |
7050 | } | |
7051 | } | |
7052 | if (!ok) | |
7053 | ppc_object->set_no_toc_opt(reloc.get_r_offset()); | |
7054 | } | |
7055 | ||
7056 | enum {no_check, check_lo, check_ha} insn_check; | |
7057 | switch (r_type) | |
7058 | { | |
7059 | default: | |
7060 | insn_check = no_check; | |
7061 | break; | |
7062 | ||
7063 | case elfcpp::R_POWERPC_GOT_TLSLD16_HA: | |
7064 | case elfcpp::R_POWERPC_GOT_TLSGD16_HA: | |
7065 | case elfcpp::R_POWERPC_GOT_TPREL16_HA: | |
7066 | case elfcpp::R_POWERPC_GOT_DTPREL16_HA: | |
7067 | case elfcpp::R_POWERPC_GOT16_HA: | |
7068 | case elfcpp::R_PPC64_TOC16_HA: | |
7069 | insn_check = check_ha; | |
7070 | break; | |
7071 | ||
7072 | case elfcpp::R_POWERPC_GOT_TLSLD16_LO: | |
7073 | case elfcpp::R_POWERPC_GOT_TLSGD16_LO: | |
7074 | case elfcpp::R_POWERPC_GOT_TPREL16_LO: | |
7075 | case elfcpp::R_POWERPC_GOT_DTPREL16_LO: | |
7076 | case elfcpp::R_POWERPC_GOT16_LO: | |
7077 | case elfcpp::R_PPC64_GOT16_LO_DS: | |
7078 | case elfcpp::R_PPC64_TOC16_LO: | |
7079 | case elfcpp::R_PPC64_TOC16_LO_DS: | |
7080 | insn_check = check_lo; | |
7081 | break; | |
7082 | } | |
7083 | ||
7084 | section_size_type slen; | |
7085 | const unsigned char* view = NULL; | |
7086 | if (insn_check != no_check) | |
7087 | { | |
7088 | view = ppc_object->section_contents(data_shndx, &slen, false); | |
7089 | section_size_type off = | |
7090 | convert_to_section_size_type(reloc.get_r_offset()) & -4; | |
7091 | if (off < slen) | |
7092 | { | |
7093 | uint32_t insn = elfcpp::Swap<32, big_endian>::readval(view + off); | |
7094 | if (insn_check == check_lo | |
7095 | ? !ok_lo_toc_insn(insn, r_type) | |
7096 | : ((insn & ((0x3f << 26) | 0x1f << 16)) | |
7097 | != ((15u << 26) | (2 << 16)) /* addis rt,2,imm */)) | |
7098 | { | |
7099 | ppc_object->set_no_toc_opt(); | |
7100 | gold_warning(_("%s: toc optimization is not supported " | |
7101 | "for %#08x instruction"), | |
7102 | ppc_object->name().c_str(), insn); | |
7103 | } | |
7104 | } | |
7105 | } | |
7106 | ||
7107 | switch (r_type) | |
7108 | { | |
7109 | default: | |
7110 | break; | |
7111 | case elfcpp::R_PPC64_TOC16: | |
7112 | case elfcpp::R_PPC64_TOC16_LO: | |
7113 | case elfcpp::R_PPC64_TOC16_HI: | |
7114 | case elfcpp::R_PPC64_TOC16_HA: | |
7115 | case elfcpp::R_PPC64_TOC16_DS: | |
7116 | case elfcpp::R_PPC64_TOC16_LO_DS: | |
7117 | unsigned int shndx = lsym.get_st_shndx(); | |
7118 | unsigned int r_sym = elfcpp::elf_r_sym<size>(reloc.get_r_info()); | |
7119 | bool is_ordinary; | |
7120 | shndx = ppc_object->adjust_sym_shndx(r_sym, shndx, &is_ordinary); | |
7121 | if (is_ordinary && shndx == ppc_object->toc_shndx()) | |
7122 | { | |
412294da | 7123 | Address dst_off = lsym.get_st_value() + reloc.get_r_addend(); |
5edad15d AM |
7124 | if (dst_off < ppc_object->section_size(shndx)) |
7125 | { | |
7126 | bool ok = false; | |
7127 | if (r_type == elfcpp::R_PPC64_TOC16_HA) | |
7128 | ok = true; | |
7129 | else if (r_type == elfcpp::R_PPC64_TOC16_LO_DS) | |
7130 | { | |
7131 | // Need to check that the insn is a ld | |
7132 | if (!view) | |
7133 | view = ppc_object->section_contents(data_shndx, | |
7134 | &slen, | |
7135 | false); | |
7136 | section_size_type off = | |
7137 | (convert_to_section_size_type(reloc.get_r_offset()) | |
7138 | + (big_endian ? -2 : 3)); | |
7139 | if (off < slen | |
7140 | && (view[off] & (0x3f << 2)) == 58u << 2) | |
7141 | ok = true; | |
7142 | } | |
7143 | if (!ok) | |
7144 | ppc_object->set_no_toc_opt(dst_off); | |
7145 | } | |
7146 | } | |
7147 | break; | |
7148 | } | |
7149 | } | |
7150 | ||
f159cdb6 AM |
7151 | if (size == 32) |
7152 | { | |
7153 | switch (r_type) | |
7154 | { | |
7155 | case elfcpp::R_POWERPC_REL32: | |
7156 | if (ppc_object->got2_shndx() != 0 | |
7157 | && parameters->options().output_is_position_independent()) | |
7158 | { | |
7159 | unsigned int shndx = lsym.get_st_shndx(); | |
7160 | unsigned int r_sym = elfcpp::elf_r_sym<size>(reloc.get_r_info()); | |
7161 | bool is_ordinary; | |
7162 | shndx = ppc_object->adjust_sym_shndx(r_sym, shndx, &is_ordinary); | |
7163 | if (is_ordinary && shndx == ppc_object->got2_shndx() | |
7164 | && (ppc_object->section_flags(data_shndx) | |
7165 | & elfcpp::SHF_EXECINSTR) != 0) | |
7166 | gold_error(_("%s: unsupported -mbss-plt code"), | |
7167 | ppc_object->name().c_str()); | |
7168 | } | |
7169 | break; | |
7170 | default: | |
7171 | break; | |
7172 | } | |
7173 | } | |
7174 | ||
d8f5a274 AM |
7175 | switch (r_type) |
7176 | { | |
7177 | case elfcpp::R_POWERPC_GOT_TLSLD16: | |
7178 | case elfcpp::R_POWERPC_GOT_TLSGD16: | |
7179 | case elfcpp::R_POWERPC_GOT_TPREL16: | |
7180 | case elfcpp::R_POWERPC_GOT_DTPREL16: | |
7181 | case elfcpp::R_POWERPC_GOT16: | |
7182 | case elfcpp::R_PPC64_GOT16_DS: | |
7183 | case elfcpp::R_PPC64_TOC16: | |
7184 | case elfcpp::R_PPC64_TOC16_DS: | |
7185 | ppc_object->set_has_small_toc_reloc(); | |
7186 | default: | |
7187 | break; | |
7188 | } | |
dd93cd0a AM |
7189 | } |
7190 | ||
7191 | // Report an unsupported relocation against a global symbol. | |
7192 | ||
7193 | template<int size, bool big_endian> | |
7194 | void | |
7195 | Target_powerpc<size, big_endian>::Scan::unsupported_reloc_global( | |
7196 | Sized_relobj_file<size, big_endian>* object, | |
7197 | unsigned int r_type, | |
7198 | Symbol* gsym) | |
7199 | { | |
42cacb20 DE |
7200 | gold_error(_("%s: unsupported reloc %u against global symbol %s"), |
7201 | object->name().c_str(), r_type, gsym->demangled_name().c_str()); | |
7202 | } | |
7203 | ||
7204 | // Scan a relocation for a global symbol. | |
7205 | ||
7206 | template<int size, bool big_endian> | |
7207 | inline void | |
7208 | Target_powerpc<size, big_endian>::Scan::global( | |
d83ce4e3 AM |
7209 | Symbol_table* symtab, |
7210 | Layout* layout, | |
7211 | Target_powerpc<size, big_endian>* target, | |
7212 | Sized_relobj_file<size, big_endian>* object, | |
7213 | unsigned int data_shndx, | |
7214 | Output_section* output_section, | |
7215 | const elfcpp::Rela<size, big_endian>& reloc, | |
7216 | unsigned int r_type, | |
7217 | Symbol* gsym) | |
42cacb20 | 7218 | { |
34e0882b AM |
7219 | if (this->maybe_skip_tls_get_addr_call(target, r_type, gsym) |
7220 | == Track_tls::SKIP) | |
e3deeb9c AM |
7221 | return; |
7222 | ||
34e0882b AM |
7223 | if (target->replace_tls_get_addr(gsym)) |
7224 | // Change a __tls_get_addr reference to __tls_get_addr_opt | |
7225 | // so dynamic relocs are emitted against the latter symbol. | |
7226 | gsym = target->tls_get_addr_opt(); | |
7227 | ||
e3deeb9c AM |
7228 | if ((size == 64 && r_type == elfcpp::R_PPC64_TLSGD) |
7229 | || (size == 32 && r_type == elfcpp::R_PPC_TLSGD)) | |
7230 | { | |
7231 | this->expect_tls_get_addr_call(); | |
7232 | const bool final = gsym->final_value_is_known(); | |
7233 | const tls::Tls_optimization tls_type = target->optimize_tls_gd(final); | |
7234 | if (tls_type != tls::TLSOPT_NONE) | |
7235 | this->skip_next_tls_get_addr_call(); | |
7236 | } | |
7237 | else if ((size == 64 && r_type == elfcpp::R_PPC64_TLSLD) | |
7238 | || (size == 32 && r_type == elfcpp::R_PPC_TLSLD)) | |
7239 | { | |
7240 | this->expect_tls_get_addr_call(); | |
7241 | const tls::Tls_optimization tls_type = target->optimize_tls_ld(); | |
7242 | if (tls_type != tls::TLSOPT_NONE) | |
7243 | this->skip_next_tls_get_addr_call(); | |
7244 | } | |
7245 | ||
dd93cd0a AM |
7246 | Powerpc_relobj<size, big_endian>* ppc_object |
7247 | = static_cast<Powerpc_relobj<size, big_endian>*>(object); | |
7248 | ||
e5d5f5ed | 7249 | // A STT_GNU_IFUNC symbol may require a PLT entry. |
b3ccdeb5 | 7250 | bool is_ifunc = gsym->type() == elfcpp::STT_GNU_IFUNC; |
9055360d AM |
7251 | bool pushed_ifunc = false; |
7252 | if (is_ifunc && this->reloc_needs_plt_for_ifunc(target, object, r_type, true)) | |
ec661b9d | 7253 | { |
0e123f69 | 7254 | unsigned int r_sym = elfcpp::elf_r_sym<size>(reloc.get_r_info()); |
ec661b9d | 7255 | target->push_branch(ppc_object, data_shndx, reloc.get_r_offset(), |
0e123f69 | 7256 | r_type, r_sym, reloc.get_r_addend()); |
ec661b9d | 7257 | target->make_plt_entry(symtab, layout, gsym); |
9055360d | 7258 | pushed_ifunc = true; |
ec661b9d | 7259 | } |
e5d5f5ed | 7260 | |
42cacb20 DE |
7261 | switch (r_type) |
7262 | { | |
7263 | case elfcpp::R_POWERPC_NONE: | |
7264 | case elfcpp::R_POWERPC_GNU_VTINHERIT: | |
7265 | case elfcpp::R_POWERPC_GNU_VTENTRY: | |
cf43a2fe | 7266 | case elfcpp::R_PPC_LOCAL24PC: |
7404fe1b | 7267 | case elfcpp::R_POWERPC_TLS: |
549dba71 | 7268 | case elfcpp::R_PPC64_ENTRY: |
dd93cd0a AM |
7269 | break; |
7270 | ||
7271 | case elfcpp::R_PPC64_TOC: | |
7272 | { | |
7273 | Output_data_got_powerpc<size, big_endian>* got | |
7274 | = target->got_section(symtab, layout); | |
7275 | if (parameters->options().output_is_position_independent()) | |
7276 | { | |
bfdfa4cd AM |
7277 | Address off = reloc.get_r_offset(); |
7278 | if (size == 64 | |
7279 | && data_shndx == ppc_object->opd_shndx() | |
7280 | && ppc_object->get_opd_discard(off - 8)) | |
7281 | break; | |
7282 | ||
dd93cd0a AM |
7283 | Reloc_section* rela_dyn = target->rela_dyn_section(layout); |
7284 | Powerpc_relobj<size, big_endian>* symobj = ppc_object; | |
7285 | if (data_shndx != ppc_object->opd_shndx()) | |
7286 | symobj = static_cast | |
7287 | <Powerpc_relobj<size, big_endian>*>(gsym->object()); | |
7288 | rela_dyn->add_output_section_relative(got->output_section(), | |
7289 | elfcpp::R_POWERPC_RELATIVE, | |
7290 | output_section, | |
bfdfa4cd | 7291 | object, data_shndx, off, |
dd93cd0a AM |
7292 | symobj->toc_base_offset()); |
7293 | } | |
7294 | } | |
42cacb20 DE |
7295 | break; |
7296 | ||
c9269dff | 7297 | case elfcpp::R_PPC64_ADDR64: |
bfdfa4cd | 7298 | if (size == 64 |
9055360d | 7299 | && target->abiversion() < 2 |
bfdfa4cd AM |
7300 | && data_shndx == ppc_object->opd_shndx() |
7301 | && (gsym->is_defined_in_discarded_section() | |
7302 | || gsym->object() != object)) | |
7303 | { | |
7304 | ppc_object->set_opd_discard(reloc.get_r_offset()); | |
7305 | break; | |
7306 | } | |
d8e90251 | 7307 | // Fall through. |
dd93cd0a | 7308 | case elfcpp::R_PPC64_UADDR64: |
c9269dff | 7309 | case elfcpp::R_POWERPC_ADDR32: |
dd93cd0a AM |
7310 | case elfcpp::R_POWERPC_UADDR32: |
7311 | case elfcpp::R_POWERPC_ADDR24: | |
42cacb20 DE |
7312 | case elfcpp::R_POWERPC_ADDR16: |
7313 | case elfcpp::R_POWERPC_ADDR16_LO: | |
7314 | case elfcpp::R_POWERPC_ADDR16_HI: | |
7315 | case elfcpp::R_POWERPC_ADDR16_HA: | |
dd93cd0a | 7316 | case elfcpp::R_POWERPC_UADDR16: |
f9c6b907 AM |
7317 | case elfcpp::R_PPC64_ADDR16_HIGH: |
7318 | case elfcpp::R_PPC64_ADDR16_HIGHA: | |
dd93cd0a AM |
7319 | case elfcpp::R_PPC64_ADDR16_HIGHER: |
7320 | case elfcpp::R_PPC64_ADDR16_HIGHERA: | |
7321 | case elfcpp::R_PPC64_ADDR16_HIGHEST: | |
7322 | case elfcpp::R_PPC64_ADDR16_HIGHESTA: | |
7323 | case elfcpp::R_PPC64_ADDR16_DS: | |
7324 | case elfcpp::R_PPC64_ADDR16_LO_DS: | |
7325 | case elfcpp::R_POWERPC_ADDR14: | |
7326 | case elfcpp::R_POWERPC_ADDR14_BRTAKEN: | |
7327 | case elfcpp::R_POWERPC_ADDR14_BRNTAKEN: | |
42cacb20 | 7328 | { |
c9269dff AM |
7329 | // Make a PLT entry if necessary. |
7330 | if (gsym->needs_plt_entry()) | |
7331 | { | |
9055360d AM |
7332 | // Since this is not a PC-relative relocation, we may be |
7333 | // taking the address of a function. In that case we need to | |
7334 | // set the entry in the dynamic symbol table to the address of | |
7335 | // the PLT call stub. | |
7336 | bool need_ifunc_plt = false; | |
7337 | if ((size == 32 || target->abiversion() >= 2) | |
7338 | && gsym->is_from_dynobj() | |
7339 | && !parameters->options().output_is_position_independent()) | |
7340 | { | |
7341 | gsym->set_needs_dynsym_value(); | |
7342 | need_ifunc_plt = true; | |
7343 | } | |
7344 | if (!is_ifunc || (!pushed_ifunc && need_ifunc_plt)) | |
b3ccdeb5 | 7345 | { |
0e123f69 | 7346 | unsigned int r_sym = elfcpp::elf_r_sym<size>(reloc.get_r_info()); |
b3ccdeb5 | 7347 | target->push_branch(ppc_object, data_shndx, |
0e123f69 | 7348 | reloc.get_r_offset(), r_type, r_sym, |
b3ccdeb5 AM |
7349 | reloc.get_r_addend()); |
7350 | target->make_plt_entry(symtab, layout, gsym); | |
7351 | } | |
c9269dff AM |
7352 | } |
7353 | // Make a dynamic relocation if necessary. | |
88b8e639 | 7354 | if (gsym->needs_dynamic_reloc(Scan::get_reference_flags(r_type, target)) |
9055360d | 7355 | || (size == 64 && is_ifunc && target->abiversion() < 2)) |
c9269dff | 7356 | { |
a82bef93 ST |
7357 | if (!parameters->options().output_is_position_independent() |
7358 | && gsym->may_need_copy_reloc()) | |
c9269dff AM |
7359 | { |
7360 | target->copy_reloc(symtab, layout, object, | |
7361 | data_shndx, output_section, gsym, reloc); | |
7362 | } | |
9055360d AM |
7363 | else if ((((size == 32 |
7364 | && r_type == elfcpp::R_POWERPC_ADDR32) | |
7365 | || (size == 64 | |
7366 | && r_type == elfcpp::R_PPC64_ADDR64 | |
7367 | && target->abiversion() >= 2)) | |
627b30b7 AM |
7368 | && gsym->can_use_relative_reloc(false) |
7369 | && !(gsym->visibility() == elfcpp::STV_PROTECTED | |
7370 | && parameters->options().shared())) | |
7371 | || (size == 64 | |
7372 | && r_type == elfcpp::R_PPC64_ADDR64 | |
9055360d | 7373 | && target->abiversion() < 2 |
627b30b7 AM |
7374 | && (gsym->can_use_relative_reloc(false) |
7375 | || data_shndx == ppc_object->opd_shndx()))) | |
2e702c99 | 7376 | { |
b3ccdeb5 AM |
7377 | Reloc_section* rela_dyn |
7378 | = target->rela_dyn_section(symtab, layout, is_ifunc); | |
7379 | unsigned int dynrel = (is_ifunc ? elfcpp::R_POWERPC_IRELATIVE | |
7380 | : elfcpp::R_POWERPC_RELATIVE); | |
e5d5f5ed AM |
7381 | rela_dyn->add_symbolless_global_addend( |
7382 | gsym, dynrel, output_section, object, data_shndx, | |
7383 | reloc.get_r_offset(), reloc.get_r_addend()); | |
2e702c99 RM |
7384 | } |
7385 | else | |
7386 | { | |
b3ccdeb5 AM |
7387 | Reloc_section* rela_dyn |
7388 | = target->rela_dyn_section(symtab, layout, is_ifunc); | |
42cacb20 | 7389 | check_non_pic(object, r_type); |
dd93cd0a AM |
7390 | rela_dyn->add_global(gsym, r_type, output_section, |
7391 | object, data_shndx, | |
7392 | reloc.get_r_offset(), | |
7393 | reloc.get_r_addend()); | |
5edad15d AM |
7394 | |
7395 | if (size == 64 | |
7396 | && parameters->options().toc_optimize() | |
7397 | && data_shndx == ppc_object->toc_shndx()) | |
7398 | ppc_object->set_no_toc_opt(reloc.get_r_offset()); | |
2e702c99 RM |
7399 | } |
7400 | } | |
42cacb20 DE |
7401 | } |
7402 | break; | |
7403 | ||
08be3224 AM |
7404 | case elfcpp::R_POWERPC_PLT16_LO: |
7405 | case elfcpp::R_POWERPC_PLT16_HI: | |
7406 | case elfcpp::R_POWERPC_PLT16_HA: | |
7407 | case elfcpp::R_PPC64_PLT16_LO_DS: | |
7408 | if (!pushed_ifunc) | |
7409 | target->make_plt_entry(symtab, layout, gsym); | |
7410 | break; | |
7411 | ||
cf43a2fe | 7412 | case elfcpp::R_PPC_PLTREL24: |
42cacb20 | 7413 | case elfcpp::R_POWERPC_REL24: |
b3ccdeb5 AM |
7414 | if (!is_ifunc) |
7415 | { | |
0e123f69 | 7416 | unsigned int r_sym = elfcpp::elf_r_sym<size>(reloc.get_r_info()); |
b3ccdeb5 | 7417 | target->push_branch(ppc_object, data_shndx, reloc.get_r_offset(), |
0e123f69 | 7418 | r_type, r_sym, reloc.get_r_addend()); |
b3ccdeb5 AM |
7419 | if (gsym->needs_plt_entry() |
7420 | || (!gsym->final_value_is_known() | |
7421 | && (gsym->is_undefined() | |
7422 | || gsym->is_from_dynobj() | |
7423 | || gsym->is_preemptible()))) | |
7424 | target->make_plt_entry(symtab, layout, gsym); | |
7425 | } | |
d8e90251 | 7426 | // Fall through. |
42cacb20 | 7427 | |
3ea0a085 | 7428 | case elfcpp::R_PPC64_REL64: |
dd93cd0a | 7429 | case elfcpp::R_POWERPC_REL32: |
3ea0a085 | 7430 | // Make a dynamic relocation if necessary. |
88b8e639 | 7431 | if (gsym->needs_dynamic_reloc(Scan::get_reference_flags(r_type, target))) |
3ea0a085 | 7432 | { |
a82bef93 ST |
7433 | if (!parameters->options().output_is_position_independent() |
7434 | && gsym->may_need_copy_reloc()) | |
3ea0a085 AM |
7435 | { |
7436 | target->copy_reloc(symtab, layout, object, | |
7437 | data_shndx, output_section, gsym, | |
7438 | reloc); | |
7439 | } | |
7440 | else | |
7441 | { | |
b3ccdeb5 AM |
7442 | Reloc_section* rela_dyn |
7443 | = target->rela_dyn_section(symtab, layout, is_ifunc); | |
3ea0a085 AM |
7444 | check_non_pic(object, r_type); |
7445 | rela_dyn->add_global(gsym, r_type, output_section, object, | |
7446 | data_shndx, reloc.get_r_offset(), | |
7447 | reloc.get_r_addend()); | |
7448 | } | |
7449 | } | |
7450 | break; | |
7451 | ||
ec661b9d AM |
7452 | case elfcpp::R_POWERPC_REL14: |
7453 | case elfcpp::R_POWERPC_REL14_BRTAKEN: | |
7454 | case elfcpp::R_POWERPC_REL14_BRNTAKEN: | |
b3ccdeb5 | 7455 | if (!is_ifunc) |
0e123f69 AM |
7456 | { |
7457 | unsigned int r_sym = elfcpp::elf_r_sym<size>(reloc.get_r_info()); | |
7458 | target->push_branch(ppc_object, data_shndx, reloc.get_r_offset(), | |
7459 | r_type, r_sym, reloc.get_r_addend()); | |
7460 | } | |
ec661b9d AM |
7461 | break; |
7462 | ||
7e57d19e AM |
7463 | case elfcpp::R_PPC64_TOCSAVE: |
7464 | // R_PPC64_TOCSAVE follows a call instruction to indicate the | |
7465 | // caller has already saved r2 and thus a plt call stub need not | |
7466 | // save r2. | |
7467 | if (size == 64 | |
7468 | && target->mark_pltcall(ppc_object, data_shndx, | |
7469 | reloc.get_r_offset() - 4, symtab)) | |
7470 | { | |
7471 | unsigned int r_sym = elfcpp::elf_r_sym<size>(reloc.get_r_info()); | |
7472 | bool is_ordinary; | |
7473 | unsigned int shndx = gsym->shndx(&is_ordinary); | |
7474 | if (!is_ordinary) | |
7475 | object->error(_("tocsave symbol %u has bad shndx %u"), | |
7476 | r_sym, shndx); | |
7477 | else | |
7478 | { | |
7479 | Sized_symbol<size>* sym = symtab->get_sized_symbol<size>(gsym); | |
7480 | target->add_tocsave(ppc_object, shndx, | |
7481 | sym->value() + reloc.get_r_addend()); | |
7482 | } | |
7483 | } | |
7484 | break; | |
7485 | ||
6ce78956 AM |
7486 | case elfcpp::R_POWERPC_REL16: |
7487 | case elfcpp::R_POWERPC_REL16_LO: | |
7488 | case elfcpp::R_POWERPC_REL16_HI: | |
7489 | case elfcpp::R_POWERPC_REL16_HA: | |
a680de9a | 7490 | case elfcpp::R_POWERPC_REL16DX_HA: |
dd93cd0a | 7491 | case elfcpp::R_POWERPC_SECTOFF: |
dd93cd0a | 7492 | case elfcpp::R_POWERPC_SECTOFF_LO: |
dd93cd0a | 7493 | case elfcpp::R_POWERPC_SECTOFF_HI: |
dd93cd0a | 7494 | case elfcpp::R_POWERPC_SECTOFF_HA: |
f9c6b907 AM |
7495 | case elfcpp::R_PPC64_SECTOFF_DS: |
7496 | case elfcpp::R_PPC64_SECTOFF_LO_DS: | |
7497 | case elfcpp::R_POWERPC_TPREL16: | |
7498 | case elfcpp::R_POWERPC_TPREL16_LO: | |
7499 | case elfcpp::R_POWERPC_TPREL16_HI: | |
dd93cd0a | 7500 | case elfcpp::R_POWERPC_TPREL16_HA: |
f9c6b907 AM |
7501 | case elfcpp::R_PPC64_TPREL16_DS: |
7502 | case elfcpp::R_PPC64_TPREL16_LO_DS: | |
7503 | case elfcpp::R_PPC64_TPREL16_HIGH: | |
7504 | case elfcpp::R_PPC64_TPREL16_HIGHA: | |
dd93cd0a | 7505 | case elfcpp::R_PPC64_TPREL16_HIGHER: |
dd93cd0a | 7506 | case elfcpp::R_PPC64_TPREL16_HIGHERA: |
dd93cd0a | 7507 | case elfcpp::R_PPC64_TPREL16_HIGHEST: |
dd93cd0a | 7508 | case elfcpp::R_PPC64_TPREL16_HIGHESTA: |
f9c6b907 AM |
7509 | case elfcpp::R_POWERPC_DTPREL16: |
7510 | case elfcpp::R_POWERPC_DTPREL16_LO: | |
7511 | case elfcpp::R_POWERPC_DTPREL16_HI: | |
7512 | case elfcpp::R_POWERPC_DTPREL16_HA: | |
dd93cd0a AM |
7513 | case elfcpp::R_PPC64_DTPREL16_DS: |
7514 | case elfcpp::R_PPC64_DTPREL16_LO_DS: | |
f9c6b907 AM |
7515 | case elfcpp::R_PPC64_DTPREL16_HIGH: |
7516 | case elfcpp::R_PPC64_DTPREL16_HIGHA: | |
7517 | case elfcpp::R_PPC64_DTPREL16_HIGHER: | |
7518 | case elfcpp::R_PPC64_DTPREL16_HIGHERA: | |
7519 | case elfcpp::R_PPC64_DTPREL16_HIGHEST: | |
7520 | case elfcpp::R_PPC64_DTPREL16_HIGHESTA: | |
dd93cd0a AM |
7521 | case elfcpp::R_PPC64_TLSGD: |
7522 | case elfcpp::R_PPC64_TLSLD: | |
45965137 | 7523 | case elfcpp::R_PPC64_ADDR64_LOCAL: |
cf43a2fe AM |
7524 | break; |
7525 | ||
42cacb20 DE |
7526 | case elfcpp::R_POWERPC_GOT16: |
7527 | case elfcpp::R_POWERPC_GOT16_LO: | |
7528 | case elfcpp::R_POWERPC_GOT16_HI: | |
7529 | case elfcpp::R_POWERPC_GOT16_HA: | |
dd93cd0a AM |
7530 | case elfcpp::R_PPC64_GOT16_DS: |
7531 | case elfcpp::R_PPC64_GOT16_LO_DS: | |
42cacb20 | 7532 | { |
c9269dff AM |
7533 | // The symbol requires a GOT entry. |
7534 | Output_data_got_powerpc<size, big_endian>* got; | |
42cacb20 DE |
7535 | |
7536 | got = target->got_section(symtab, layout); | |
2e702c99 | 7537 | if (gsym->final_value_is_known()) |
2e702c99 | 7538 | { |
b01a4b04 AM |
7539 | if (is_ifunc |
7540 | && (size == 32 || target->abiversion() >= 2)) | |
e5d5f5ed AM |
7541 | got->add_global_plt(gsym, GOT_TYPE_STANDARD); |
7542 | else | |
7543 | got->add_global(gsym, GOT_TYPE_STANDARD); | |
7544 | } | |
7545 | else if (!gsym->has_got_offset(GOT_TYPE_STANDARD)) | |
7546 | { | |
7547 | // If we are generating a shared object or a pie, this | |
7548 | // symbol's GOT entry will be set by a dynamic relocation. | |
7549 | unsigned int off = got->add_constant(0); | |
7550 | gsym->set_got_offset(GOT_TYPE_STANDARD, off); | |
7551 | ||
b3ccdeb5 AM |
7552 | Reloc_section* rela_dyn |
7553 | = target->rela_dyn_section(symtab, layout, is_ifunc); | |
7554 | ||
e5d5f5ed | 7555 | if (gsym->can_use_relative_reloc(false) |
9055360d AM |
7556 | && !((size == 32 |
7557 | || target->abiversion() >= 2) | |
e5d5f5ed AM |
7558 | && gsym->visibility() == elfcpp::STV_PROTECTED |
7559 | && parameters->options().shared())) | |
2e702c99 | 7560 | { |
b3ccdeb5 AM |
7561 | unsigned int dynrel = (is_ifunc ? elfcpp::R_POWERPC_IRELATIVE |
7562 | : elfcpp::R_POWERPC_RELATIVE); | |
e5d5f5ed AM |
7563 | rela_dyn->add_global_relative(gsym, dynrel, got, off, 0, false); |
7564 | } | |
7565 | else | |
7566 | { | |
7567 | unsigned int dynrel = elfcpp::R_POWERPC_GLOB_DAT; | |
7568 | rela_dyn->add_global(gsym, dynrel, got, off, 0); | |
42cacb20 | 7569 | } |
2e702c99 | 7570 | } |
42cacb20 DE |
7571 | } |
7572 | break; | |
7573 | ||
cf43a2fe AM |
7574 | case elfcpp::R_PPC64_TOC16: |
7575 | case elfcpp::R_PPC64_TOC16_LO: | |
7576 | case elfcpp::R_PPC64_TOC16_HI: | |
7577 | case elfcpp::R_PPC64_TOC16_HA: | |
7578 | case elfcpp::R_PPC64_TOC16_DS: | |
7579 | case elfcpp::R_PPC64_TOC16_LO_DS: | |
42cacb20 DE |
7580 | // We need a GOT section. |
7581 | target->got_section(symtab, layout); | |
7582 | break; | |
7583 | ||
dd93cd0a AM |
7584 | case elfcpp::R_POWERPC_GOT_TLSGD16: |
7585 | case elfcpp::R_POWERPC_GOT_TLSGD16_LO: | |
7586 | case elfcpp::R_POWERPC_GOT_TLSGD16_HI: | |
7587 | case elfcpp::R_POWERPC_GOT_TLSGD16_HA: | |
7588 | { | |
7589 | const bool final = gsym->final_value_is_known(); | |
7590 | const tls::Tls_optimization tls_type = target->optimize_tls_gd(final); | |
7591 | if (tls_type == tls::TLSOPT_NONE) | |
7592 | { | |
7593 | Output_data_got_powerpc<size, big_endian>* got | |
7594 | = target->got_section(symtab, layout); | |
b3ccdeb5 AM |
7595 | Reloc_section* rela_dyn = target->rela_dyn_section(layout); |
7596 | got->add_global_pair_with_rel(gsym, GOT_TYPE_TLSGD, rela_dyn, | |
dd93cd0a AM |
7597 | elfcpp::R_POWERPC_DTPMOD, |
7598 | elfcpp::R_POWERPC_DTPREL); | |
7599 | } | |
7600 | else if (tls_type == tls::TLSOPT_TO_IE) | |
7601 | { | |
acc276d8 AM |
7602 | if (!gsym->has_got_offset(GOT_TYPE_TPREL)) |
7603 | { | |
7604 | Output_data_got_powerpc<size, big_endian>* got | |
7605 | = target->got_section(symtab, layout); | |
7606 | Reloc_section* rela_dyn = target->rela_dyn_section(layout); | |
7607 | if (gsym->is_undefined() | |
7608 | || gsym->is_from_dynobj()) | |
7609 | { | |
7610 | got->add_global_with_rel(gsym, GOT_TYPE_TPREL, rela_dyn, | |
7611 | elfcpp::R_POWERPC_TPREL); | |
7612 | } | |
7613 | else | |
7614 | { | |
7615 | unsigned int off = got->add_constant(0); | |
7616 | gsym->set_got_offset(GOT_TYPE_TPREL, off); | |
7617 | unsigned int dynrel = elfcpp::R_POWERPC_TPREL; | |
7618 | rela_dyn->add_symbolless_global_addend(gsym, dynrel, | |
7619 | got, off, 0); | |
7620 | } | |
7621 | } | |
dd93cd0a AM |
7622 | } |
7623 | else if (tls_type == tls::TLSOPT_TO_LE) | |
7624 | { | |
7625 | // no GOT relocs needed for Local Exec. | |
7626 | } | |
7627 | else | |
7628 | gold_unreachable(); | |
7629 | } | |
42cacb20 DE |
7630 | break; |
7631 | ||
dd93cd0a AM |
7632 | case elfcpp::R_POWERPC_GOT_TLSLD16: |
7633 | case elfcpp::R_POWERPC_GOT_TLSLD16_LO: | |
7634 | case elfcpp::R_POWERPC_GOT_TLSLD16_HI: | |
7635 | case elfcpp::R_POWERPC_GOT_TLSLD16_HA: | |
7636 | { | |
7637 | const tls::Tls_optimization tls_type = target->optimize_tls_ld(); | |
7638 | if (tls_type == tls::TLSOPT_NONE) | |
7639 | target->tlsld_got_offset(symtab, layout, object); | |
7640 | else if (tls_type == tls::TLSOPT_TO_LE) | |
7641 | { | |
7642 | // no GOT relocs needed for Local Exec. | |
7404fe1b AM |
7643 | if (parameters->options().emit_relocs()) |
7644 | { | |
7645 | Output_section* os = layout->tls_segment()->first_section(); | |
7646 | gold_assert(os != NULL); | |
7647 | os->set_needs_symtab_index(); | |
7648 | } | |
dd93cd0a AM |
7649 | } |
7650 | else | |
7651 | gold_unreachable(); | |
7652 | } | |
7653 | break; | |
7654 | ||
7655 | case elfcpp::R_POWERPC_GOT_DTPREL16: | |
7656 | case elfcpp::R_POWERPC_GOT_DTPREL16_LO: | |
7657 | case elfcpp::R_POWERPC_GOT_DTPREL16_HI: | |
7658 | case elfcpp::R_POWERPC_GOT_DTPREL16_HA: | |
7659 | { | |
7660 | Output_data_got_powerpc<size, big_endian>* got | |
7661 | = target->got_section(symtab, layout); | |
bd73a62d AM |
7662 | if (!gsym->final_value_is_known() |
7663 | && (gsym->is_from_dynobj() | |
7664 | || gsym->is_undefined() | |
7665 | || gsym->is_preemptible())) | |
7666 | got->add_global_with_rel(gsym, GOT_TYPE_DTPREL, | |
7667 | target->rela_dyn_section(layout), | |
7668 | elfcpp::R_POWERPC_DTPREL); | |
7669 | else | |
7670 | got->add_global_tls(gsym, GOT_TYPE_DTPREL); | |
dd93cd0a AM |
7671 | } |
7672 | break; | |
7673 | ||
7674 | case elfcpp::R_POWERPC_GOT_TPREL16: | |
7675 | case elfcpp::R_POWERPC_GOT_TPREL16_LO: | |
7676 | case elfcpp::R_POWERPC_GOT_TPREL16_HI: | |
7677 | case elfcpp::R_POWERPC_GOT_TPREL16_HA: | |
7678 | { | |
7679 | const bool final = gsym->final_value_is_known(); | |
7680 | const tls::Tls_optimization tls_type = target->optimize_tls_ie(final); | |
7681 | if (tls_type == tls::TLSOPT_NONE) | |
7682 | { | |
acc276d8 AM |
7683 | if (!gsym->has_got_offset(GOT_TYPE_TPREL)) |
7684 | { | |
7685 | Output_data_got_powerpc<size, big_endian>* got | |
7686 | = target->got_section(symtab, layout); | |
7687 | Reloc_section* rela_dyn = target->rela_dyn_section(layout); | |
7688 | if (gsym->is_undefined() | |
7689 | || gsym->is_from_dynobj()) | |
7690 | { | |
7691 | got->add_global_with_rel(gsym, GOT_TYPE_TPREL, rela_dyn, | |
7692 | elfcpp::R_POWERPC_TPREL); | |
7693 | } | |
7694 | else | |
7695 | { | |
7696 | unsigned int off = got->add_constant(0); | |
7697 | gsym->set_got_offset(GOT_TYPE_TPREL, off); | |
7698 | unsigned int dynrel = elfcpp::R_POWERPC_TPREL; | |
7699 | rela_dyn->add_symbolless_global_addend(gsym, dynrel, | |
7700 | got, off, 0); | |
7701 | } | |
7702 | } | |
dd93cd0a AM |
7703 | } |
7704 | else if (tls_type == tls::TLSOPT_TO_LE) | |
7705 | { | |
7706 | // no GOT relocs needed for Local Exec. | |
7707 | } | |
7708 | else | |
7709 | gold_unreachable(); | |
7710 | } | |
42cacb20 DE |
7711 | break; |
7712 | ||
7713 | default: | |
7714 | unsupported_reloc_global(object, r_type, gsym); | |
7715 | break; | |
7716 | } | |
d8f5a274 | 7717 | |
5edad15d AM |
7718 | if (size == 64 |
7719 | && parameters->options().toc_optimize()) | |
7720 | { | |
7721 | if (data_shndx == ppc_object->toc_shndx()) | |
7722 | { | |
7723 | bool ok = true; | |
7724 | if (r_type != elfcpp::R_PPC64_ADDR64 | |
7725 | || (is_ifunc && target->abiversion() < 2)) | |
7726 | ok = false; | |
7727 | else if (parameters->options().output_is_position_independent() | |
7728 | && (is_ifunc || gsym->is_absolute() || gsym->is_undefined())) | |
7729 | ok = false; | |
7730 | if (!ok) | |
7731 | ppc_object->set_no_toc_opt(reloc.get_r_offset()); | |
7732 | } | |
7733 | ||
7734 | enum {no_check, check_lo, check_ha} insn_check; | |
7735 | switch (r_type) | |
7736 | { | |
7737 | default: | |
7738 | insn_check = no_check; | |
7739 | break; | |
7740 | ||
7741 | case elfcpp::R_POWERPC_GOT_TLSLD16_HA: | |
7742 | case elfcpp::R_POWERPC_GOT_TLSGD16_HA: | |
7743 | case elfcpp::R_POWERPC_GOT_TPREL16_HA: | |
7744 | case elfcpp::R_POWERPC_GOT_DTPREL16_HA: | |
7745 | case elfcpp::R_POWERPC_GOT16_HA: | |
7746 | case elfcpp::R_PPC64_TOC16_HA: | |
7747 | insn_check = check_ha; | |
7748 | break; | |
7749 | ||
7750 | case elfcpp::R_POWERPC_GOT_TLSLD16_LO: | |
7751 | case elfcpp::R_POWERPC_GOT_TLSGD16_LO: | |
7752 | case elfcpp::R_POWERPC_GOT_TPREL16_LO: | |
7753 | case elfcpp::R_POWERPC_GOT_DTPREL16_LO: | |
7754 | case elfcpp::R_POWERPC_GOT16_LO: | |
7755 | case elfcpp::R_PPC64_GOT16_LO_DS: | |
7756 | case elfcpp::R_PPC64_TOC16_LO: | |
7757 | case elfcpp::R_PPC64_TOC16_LO_DS: | |
7758 | insn_check = check_lo; | |
7759 | break; | |
7760 | } | |
7761 | ||
7762 | section_size_type slen; | |
7763 | const unsigned char* view = NULL; | |
7764 | if (insn_check != no_check) | |
7765 | { | |
7766 | view = ppc_object->section_contents(data_shndx, &slen, false); | |
7767 | section_size_type off = | |
7768 | convert_to_section_size_type(reloc.get_r_offset()) & -4; | |
7769 | if (off < slen) | |
7770 | { | |
7771 | uint32_t insn = elfcpp::Swap<32, big_endian>::readval(view + off); | |
7772 | if (insn_check == check_lo | |
7773 | ? !ok_lo_toc_insn(insn, r_type) | |
7774 | : ((insn & ((0x3f << 26) | 0x1f << 16)) | |
7775 | != ((15u << 26) | (2 << 16)) /* addis rt,2,imm */)) | |
7776 | { | |
7777 | ppc_object->set_no_toc_opt(); | |
7778 | gold_warning(_("%s: toc optimization is not supported " | |
7779 | "for %#08x instruction"), | |
7780 | ppc_object->name().c_str(), insn); | |
7781 | } | |
7782 | } | |
7783 | } | |
7784 | ||
7785 | switch (r_type) | |
7786 | { | |
7787 | default: | |
7788 | break; | |
7789 | case elfcpp::R_PPC64_TOC16: | |
7790 | case elfcpp::R_PPC64_TOC16_LO: | |
7791 | case elfcpp::R_PPC64_TOC16_HI: | |
7792 | case elfcpp::R_PPC64_TOC16_HA: | |
7793 | case elfcpp::R_PPC64_TOC16_DS: | |
7794 | case elfcpp::R_PPC64_TOC16_LO_DS: | |
7795 | if (gsym->source() == Symbol::FROM_OBJECT | |
7796 | && !gsym->object()->is_dynamic()) | |
7797 | { | |
7798 | Powerpc_relobj<size, big_endian>* sym_object | |
7799 | = static_cast<Powerpc_relobj<size, big_endian>*>(gsym->object()); | |
7800 | bool is_ordinary; | |
7801 | unsigned int shndx = gsym->shndx(&is_ordinary); | |
7802 | if (shndx == sym_object->toc_shndx()) | |
7803 | { | |
7804 | Sized_symbol<size>* sym = symtab->get_sized_symbol<size>(gsym); | |
412294da | 7805 | Address dst_off = sym->value() + reloc.get_r_addend(); |
5edad15d AM |
7806 | if (dst_off < sym_object->section_size(shndx)) |
7807 | { | |
7808 | bool ok = false; | |
7809 | if (r_type == elfcpp::R_PPC64_TOC16_HA) | |
7810 | ok = true; | |
7811 | else if (r_type == elfcpp::R_PPC64_TOC16_LO_DS) | |
7812 | { | |
7813 | // Need to check that the insn is a ld | |
7814 | if (!view) | |
7815 | view = ppc_object->section_contents(data_shndx, | |
7816 | &slen, | |
7817 | false); | |
7818 | section_size_type off = | |
7819 | (convert_to_section_size_type(reloc.get_r_offset()) | |
7820 | + (big_endian ? -2 : 3)); | |
7821 | if (off < slen | |
7822 | && (view[off] & (0x3f << 2)) == (58u << 2)) | |
7823 | ok = true; | |
7824 | } | |
7825 | if (!ok) | |
7826 | sym_object->set_no_toc_opt(dst_off); | |
7827 | } | |
7828 | } | |
7829 | } | |
7830 | break; | |
7831 | } | |
7832 | } | |
7833 | ||
f159cdb6 AM |
7834 | if (size == 32) |
7835 | { | |
7836 | switch (r_type) | |
7837 | { | |
7838 | case elfcpp::R_PPC_LOCAL24PC: | |
7839 | if (strcmp(gsym->name(), "_GLOBAL_OFFSET_TABLE_") == 0) | |
7840 | gold_error(_("%s: unsupported -mbss-plt code"), | |
7841 | ppc_object->name().c_str()); | |
7842 | break; | |
7843 | default: | |
7844 | break; | |
7845 | } | |
7846 | } | |
7847 | ||
d8f5a274 AM |
7848 | switch (r_type) |
7849 | { | |
7850 | case elfcpp::R_POWERPC_GOT_TLSLD16: | |
7851 | case elfcpp::R_POWERPC_GOT_TLSGD16: | |
7852 | case elfcpp::R_POWERPC_GOT_TPREL16: | |
7853 | case elfcpp::R_POWERPC_GOT_DTPREL16: | |
7854 | case elfcpp::R_POWERPC_GOT16: | |
7855 | case elfcpp::R_PPC64_GOT16_DS: | |
7856 | case elfcpp::R_PPC64_TOC16: | |
7857 | case elfcpp::R_PPC64_TOC16_DS: | |
7858 | ppc_object->set_has_small_toc_reloc(); | |
7859 | default: | |
7860 | break; | |
7861 | } | |
42cacb20 DE |
7862 | } |
7863 | ||
6d03d481 ST |
7864 | // Process relocations for gc. |
7865 | ||
7866 | template<int size, bool big_endian> | |
7867 | void | |
7868 | Target_powerpc<size, big_endian>::gc_process_relocs( | |
d83ce4e3 AM |
7869 | Symbol_table* symtab, |
7870 | Layout* layout, | |
7871 | Sized_relobj_file<size, big_endian>* object, | |
7872 | unsigned int data_shndx, | |
7873 | unsigned int, | |
7874 | const unsigned char* prelocs, | |
7875 | size_t reloc_count, | |
7876 | Output_section* output_section, | |
7877 | bool needs_special_offset_handling, | |
7878 | size_t local_symbol_count, | |
7879 | const unsigned char* plocal_symbols) | |
6d03d481 ST |
7880 | { |
7881 | typedef Target_powerpc<size, big_endian> Powerpc; | |
4d625b70 CC |
7882 | typedef gold::Default_classify_reloc<elfcpp::SHT_RELA, size, big_endian> |
7883 | Classify_reloc; | |
7884 | ||
e81fea4d AM |
7885 | Powerpc_relobj<size, big_endian>* ppc_object |
7886 | = static_cast<Powerpc_relobj<size, big_endian>*>(object); | |
7887 | if (size == 64) | |
7888 | ppc_object->set_opd_valid(); | |
7889 | if (size == 64 && data_shndx == ppc_object->opd_shndx()) | |
7890 | { | |
7891 | typename Powerpc_relobj<size, big_endian>::Access_from::iterator p; | |
7892 | for (p = ppc_object->access_from_map()->begin(); | |
7893 | p != ppc_object->access_from_map()->end(); | |
7894 | ++p) | |
7895 | { | |
7896 | Address dst_off = p->first; | |
7897 | unsigned int dst_indx = ppc_object->get_opd_ent(dst_off); | |
7898 | typename Powerpc_relobj<size, big_endian>::Section_refs::iterator s; | |
7899 | for (s = p->second.begin(); s != p->second.end(); ++s) | |
7900 | { | |
efc6fa12 | 7901 | Relobj* src_obj = s->first; |
e81fea4d AM |
7902 | unsigned int src_indx = s->second; |
7903 | symtab->gc()->add_reference(src_obj, src_indx, | |
7904 | ppc_object, dst_indx); | |
7905 | } | |
7906 | p->second.clear(); | |
7907 | } | |
7908 | ppc_object->access_from_map()->clear(); | |
c6de8ed4 | 7909 | ppc_object->process_gc_mark(symtab); |
e81fea4d AM |
7910 | // Don't look at .opd relocs as .opd will reference everything. |
7911 | return; | |
7912 | } | |
6d03d481 | 7913 | |
4d625b70 | 7914 | gold::gc_process_relocs<size, big_endian, Powerpc, Scan, Classify_reloc>( |
6d03d481 ST |
7915 | symtab, |
7916 | layout, | |
7917 | this, | |
7918 | object, | |
7919 | data_shndx, | |
7920 | prelocs, | |
7921 | reloc_count, | |
7922 | output_section, | |
7923 | needs_special_offset_handling, | |
7924 | local_symbol_count, | |
7925 | plocal_symbols); | |
7926 | } | |
7927 | ||
e81fea4d AM |
7928 | // Handle target specific gc actions when adding a gc reference from |
7929 | // SRC_OBJ, SRC_SHNDX to a location specified by DST_OBJ, DST_SHNDX | |
7930 | // and DST_OFF. For powerpc64, this adds a referenc to the code | |
7931 | // section of a function descriptor. | |
7932 | ||
7933 | template<int size, bool big_endian> | |
7934 | void | |
7935 | Target_powerpc<size, big_endian>::do_gc_add_reference( | |
7936 | Symbol_table* symtab, | |
efc6fa12 | 7937 | Relobj* src_obj, |
e81fea4d | 7938 | unsigned int src_shndx, |
efc6fa12 | 7939 | Relobj* dst_obj, |
e81fea4d AM |
7940 | unsigned int dst_shndx, |
7941 | Address dst_off) const | |
7942 | { | |
6c77229c AM |
7943 | if (size != 64 || dst_obj->is_dynamic()) |
7944 | return; | |
7945 | ||
e81fea4d AM |
7946 | Powerpc_relobj<size, big_endian>* ppc_object |
7947 | = static_cast<Powerpc_relobj<size, big_endian>*>(dst_obj); | |
a2d7bf59 | 7948 | if (dst_shndx != 0 && dst_shndx == ppc_object->opd_shndx()) |
e81fea4d AM |
7949 | { |
7950 | if (ppc_object->opd_valid()) | |
7951 | { | |
7952 | dst_shndx = ppc_object->get_opd_ent(dst_off); | |
7953 | symtab->gc()->add_reference(src_obj, src_shndx, dst_obj, dst_shndx); | |
7954 | } | |
7955 | else | |
7956 | { | |
7957 | // If we haven't run scan_opd_relocs, we must delay | |
7958 | // processing this function descriptor reference. | |
7959 | ppc_object->add_reference(src_obj, src_shndx, dst_off); | |
7960 | } | |
7961 | } | |
7962 | } | |
7963 | ||
7964 | // Add any special sections for this symbol to the gc work list. | |
7965 | // For powerpc64, this adds the code section of a function | |
7966 | // descriptor. | |
7967 | ||
7968 | template<int size, bool big_endian> | |
7969 | void | |
7970 | Target_powerpc<size, big_endian>::do_gc_mark_symbol( | |
7971 | Symbol_table* symtab, | |
7972 | Symbol* sym) const | |
7973 | { | |
7974 | if (size == 64) | |
7975 | { | |
7976 | Powerpc_relobj<size, big_endian>* ppc_object | |
7977 | = static_cast<Powerpc_relobj<size, big_endian>*>(sym->object()); | |
7978 | bool is_ordinary; | |
7979 | unsigned int shndx = sym->shndx(&is_ordinary); | |
a2d7bf59 | 7980 | if (is_ordinary && shndx != 0 && shndx == ppc_object->opd_shndx()) |
e81fea4d AM |
7981 | { |
7982 | Sized_symbol<size>* gsym = symtab->get_sized_symbol<size>(sym); | |
7983 | Address dst_off = gsym->value(); | |
c6de8ed4 AM |
7984 | if (ppc_object->opd_valid()) |
7985 | { | |
7986 | unsigned int dst_indx = ppc_object->get_opd_ent(dst_off); | |
4277535c RÁE |
7987 | symtab->gc()->worklist().push_back(Section_id(ppc_object, |
7988 | dst_indx)); | |
c6de8ed4 AM |
7989 | } |
7990 | else | |
7991 | ppc_object->add_gc_mark(dst_off); | |
e81fea4d AM |
7992 | } |
7993 | } | |
7994 | } | |
7995 | ||
dc3714f3 AM |
7996 | // For a symbol location in .opd, set LOC to the location of the |
7997 | // function entry. | |
7998 | ||
7999 | template<int size, bool big_endian> | |
8000 | void | |
8001 | Target_powerpc<size, big_endian>::do_function_location( | |
8002 | Symbol_location* loc) const | |
8003 | { | |
a2d7bf59 | 8004 | if (size == 64 && loc->shndx != 0) |
dc3714f3 AM |
8005 | { |
8006 | if (loc->object->is_dynamic()) | |
8007 | { | |
8008 | Powerpc_dynobj<size, big_endian>* ppc_object | |
8009 | = static_cast<Powerpc_dynobj<size, big_endian>*>(loc->object); | |
8010 | if (loc->shndx == ppc_object->opd_shndx()) | |
8011 | { | |
8012 | Address dest_off; | |
8013 | Address off = loc->offset - ppc_object->opd_address(); | |
8014 | loc->shndx = ppc_object->get_opd_ent(off, &dest_off); | |
8015 | loc->offset = dest_off; | |
8016 | } | |
8017 | } | |
8018 | else | |
8019 | { | |
8020 | const Powerpc_relobj<size, big_endian>* ppc_object | |
8021 | = static_cast<const Powerpc_relobj<size, big_endian>*>(loc->object); | |
8022 | if (loc->shndx == ppc_object->opd_shndx()) | |
8023 | { | |
8024 | Address dest_off; | |
8025 | loc->shndx = ppc_object->get_opd_ent(loc->offset, &dest_off); | |
8026 | loc->offset = dest_off; | |
8027 | } | |
8028 | } | |
8029 | } | |
8030 | } | |
8031 | ||
bbec1a5d AM |
8032 | // FNOFFSET in section SHNDX in OBJECT is the start of a function |
8033 | // compiled with -fsplit-stack. The function calls non-split-stack | |
8034 | // code. Change the function to ensure it has enough stack space to | |
8035 | // call some random function. | |
8036 | ||
8037 | template<int size, bool big_endian> | |
8038 | void | |
8039 | Target_powerpc<size, big_endian>::do_calls_non_split( | |
8040 | Relobj* object, | |
8041 | unsigned int shndx, | |
8042 | section_offset_type fnoffset, | |
8043 | section_size_type fnsize, | |
6e0813d3 CC |
8044 | const unsigned char* prelocs, |
8045 | size_t reloc_count, | |
bbec1a5d AM |
8046 | unsigned char* view, |
8047 | section_size_type view_size, | |
8048 | std::string* from, | |
8049 | std::string* to) const | |
8050 | { | |
8051 | // 32-bit not supported. | |
8052 | if (size == 32) | |
8053 | { | |
8054 | // warn | |
8055 | Target::do_calls_non_split(object, shndx, fnoffset, fnsize, | |
6e0813d3 CC |
8056 | prelocs, reloc_count, view, view_size, |
8057 | from, to); | |
bbec1a5d AM |
8058 | return; |
8059 | } | |
8060 | ||
8061 | // The function always starts with | |
8062 | // ld %r0,-0x7000-64(%r13) # tcbhead_t.__private_ss | |
8063 | // addis %r12,%r1,-allocate@ha | |
8064 | // addi %r12,%r12,-allocate@l | |
8065 | // cmpld %r12,%r0 | |
8066 | // but note that the addis or addi may be replaced with a nop | |
8067 | ||
8068 | unsigned char *entry = view + fnoffset; | |
8069 | uint32_t insn = elfcpp::Swap<32, big_endian>::readval(entry); | |
8070 | ||
8071 | if ((insn & 0xffff0000) == addis_2_12) | |
8072 | { | |
8073 | /* Skip ELFv2 global entry code. */ | |
8074 | entry += 8; | |
8075 | insn = elfcpp::Swap<32, big_endian>::readval(entry); | |
8076 | } | |
8077 | ||
8078 | unsigned char *pinsn = entry; | |
8079 | bool ok = false; | |
8080 | const uint32_t ld_private_ss = 0xe80d8fc0; | |
8081 | if (insn == ld_private_ss) | |
8082 | { | |
8083 | int32_t allocate = 0; | |
8084 | while (1) | |
8085 | { | |
8086 | pinsn += 4; | |
8087 | insn = elfcpp::Swap<32, big_endian>::readval(pinsn); | |
8088 | if ((insn & 0xffff0000) == addis_12_1) | |
8089 | allocate += (insn & 0xffff) << 16; | |
8090 | else if ((insn & 0xffff0000) == addi_12_1 | |
8091 | || (insn & 0xffff0000) == addi_12_12) | |
8092 | allocate += ((insn & 0xffff) ^ 0x8000) - 0x8000; | |
8093 | else if (insn != nop) | |
8094 | break; | |
8095 | } | |
8096 | if (insn == cmpld_7_12_0 && pinsn == entry + 12) | |
8097 | { | |
8098 | int extra = parameters->options().split_stack_adjust_size(); | |
8099 | allocate -= extra; | |
8100 | if (allocate >= 0 || extra < 0) | |
8101 | { | |
8102 | object->error(_("split-stack stack size overflow at " | |
8103 | "section %u offset %0zx"), | |
8104 | shndx, static_cast<size_t>(fnoffset)); | |
8105 | return; | |
8106 | } | |
8107 | pinsn = entry + 4; | |
8108 | insn = addis_12_1 | (((allocate + 0x8000) >> 16) & 0xffff); | |
8109 | if (insn != addis_12_1) | |
8110 | { | |
8111 | elfcpp::Swap<32, big_endian>::writeval(pinsn, insn); | |
8112 | pinsn += 4; | |
8113 | insn = addi_12_12 | (allocate & 0xffff); | |
8114 | if (insn != addi_12_12) | |
8115 | { | |
8116 | elfcpp::Swap<32, big_endian>::writeval(pinsn, insn); | |
8117 | pinsn += 4; | |
8118 | } | |
8119 | } | |
8120 | else | |
8121 | { | |
8122 | insn = addi_12_1 | (allocate & 0xffff); | |
8123 | elfcpp::Swap<32, big_endian>::writeval(pinsn, insn); | |
8124 | pinsn += 4; | |
8125 | } | |
8126 | if (pinsn != entry + 12) | |
8127 | elfcpp::Swap<32, big_endian>::writeval(pinsn, nop); | |
8128 | ||
8129 | ok = true; | |
8130 | } | |
8131 | } | |
8132 | ||
8133 | if (!ok) | |
8134 | { | |
8135 | if (!object->has_no_split_stack()) | |
8136 | object->error(_("failed to match split-stack sequence at " | |
8137 | "section %u offset %0zx"), | |
8138 | shndx, static_cast<size_t>(fnoffset)); | |
8139 | } | |
8140 | } | |
8141 | ||
42cacb20 DE |
8142 | // Scan relocations for a section. |
8143 | ||
8144 | template<int size, bool big_endian> | |
8145 | void | |
8146 | Target_powerpc<size, big_endian>::scan_relocs( | |
d83ce4e3 AM |
8147 | Symbol_table* symtab, |
8148 | Layout* layout, | |
8149 | Sized_relobj_file<size, big_endian>* object, | |
8150 | unsigned int data_shndx, | |
8151 | unsigned int sh_type, | |
8152 | const unsigned char* prelocs, | |
8153 | size_t reloc_count, | |
8154 | Output_section* output_section, | |
8155 | bool needs_special_offset_handling, | |
8156 | size_t local_symbol_count, | |
8157 | const unsigned char* plocal_symbols) | |
42cacb20 DE |
8158 | { |
8159 | typedef Target_powerpc<size, big_endian> Powerpc; | |
4d625b70 CC |
8160 | typedef gold::Default_classify_reloc<elfcpp::SHT_RELA, size, big_endian> |
8161 | Classify_reloc; | |
42cacb20 | 8162 | |
7ee7ff70 AM |
8163 | if (!this->plt_localentry0_init_) |
8164 | { | |
8165 | bool plt_localentry0 = false; | |
8166 | if (size == 64 | |
8167 | && this->abiversion() >= 2) | |
8168 | { | |
8169 | if (parameters->options().user_set_plt_localentry()) | |
8170 | plt_localentry0 = parameters->options().plt_localentry(); | |
d44c746a AM |
8171 | if (plt_localentry0 |
8172 | && symtab->lookup("GLIBC_2.26", NULL) == NULL) | |
8173 | gold_warning(_("--plt-localentry is especially dangerous without " | |
8174 | "ld.so support to detect ABI violations")); | |
7ee7ff70 AM |
8175 | } |
8176 | this->plt_localentry0_ = plt_localentry0; | |
8177 | this->plt_localentry0_init_ = true; | |
8178 | } | |
8179 | ||
42cacb20 DE |
8180 | if (sh_type == elfcpp::SHT_REL) |
8181 | { | |
8182 | gold_error(_("%s: unsupported REL reloc section"), | |
8183 | object->name().c_str()); | |
8184 | return; | |
8185 | } | |
8186 | ||
4d625b70 | 8187 | gold::scan_relocs<size, big_endian, Powerpc, Scan, Classify_reloc>( |
42cacb20 DE |
8188 | symtab, |
8189 | layout, | |
8190 | this, | |
8191 | object, | |
8192 | data_shndx, | |
8193 | prelocs, | |
8194 | reloc_count, | |
8195 | output_section, | |
8196 | needs_special_offset_handling, | |
8197 | local_symbol_count, | |
8198 | plocal_symbols); | |
8199 | } | |
8200 | ||
ec4dbad3 AM |
8201 | // Functor class for processing the global symbol table. |
8202 | // Removes symbols defined on discarded opd entries. | |
8203 | ||
8204 | template<bool big_endian> | |
8205 | class Global_symbol_visitor_opd | |
8206 | { | |
8207 | public: | |
8208 | Global_symbol_visitor_opd() | |
8209 | { } | |
8210 | ||
8211 | void | |
8212 | operator()(Sized_symbol<64>* sym) | |
8213 | { | |
8214 | if (sym->has_symtab_index() | |
8215 | || sym->source() != Symbol::FROM_OBJECT | |
8216 | || !sym->in_real_elf()) | |
8217 | return; | |
8218 | ||
6c77229c AM |
8219 | if (sym->object()->is_dynamic()) |
8220 | return; | |
8221 | ||
ec4dbad3 AM |
8222 | Powerpc_relobj<64, big_endian>* symobj |
8223 | = static_cast<Powerpc_relobj<64, big_endian>*>(sym->object()); | |
6c77229c | 8224 | if (symobj->opd_shndx() == 0) |
ec4dbad3 AM |
8225 | return; |
8226 | ||
8227 | bool is_ordinary; | |
8228 | unsigned int shndx = sym->shndx(&is_ordinary); | |
8229 | if (shndx == symobj->opd_shndx() | |
8230 | && symobj->get_opd_discard(sym->value())) | |
1611bc4a AM |
8231 | { |
8232 | sym->set_undefined(); | |
e3ee8ed4 | 8233 | sym->set_visibility(elfcpp::STV_DEFAULT); |
1611bc4a AM |
8234 | sym->set_is_defined_in_discarded_section(); |
8235 | sym->set_symtab_index(-1U); | |
8236 | } | |
ec4dbad3 AM |
8237 | } |
8238 | }; | |
8239 | ||
f3a0ed29 AM |
8240 | template<int size, bool big_endian> |
8241 | void | |
8242 | Target_powerpc<size, big_endian>::define_save_restore_funcs( | |
8243 | Layout* layout, | |
8244 | Symbol_table* symtab) | |
8245 | { | |
8246 | if (size == 64) | |
8247 | { | |
d49044c7 AM |
8248 | Output_data_save_res<size, big_endian>* savres |
8249 | = new Output_data_save_res<size, big_endian>(symtab); | |
8250 | this->savres_section_ = savres; | |
f3a0ed29 AM |
8251 | layout->add_output_section_data(".text", elfcpp::SHT_PROGBITS, |
8252 | elfcpp::SHF_ALLOC | elfcpp::SHF_EXECINSTR, | |
8253 | savres, ORDER_TEXT, false); | |
8254 | } | |
8255 | } | |
8256 | ||
d8f5a274 AM |
8257 | // Sort linker created .got section first (for the header), then input |
8258 | // sections belonging to files using small model code. | |
8259 | ||
8260 | template<bool big_endian> | |
8261 | class Sort_toc_sections | |
8262 | { | |
8263 | public: | |
8264 | bool | |
8265 | operator()(const Output_section::Input_section& is1, | |
8266 | const Output_section::Input_section& is2) const | |
8267 | { | |
8268 | if (!is1.is_input_section() && is2.is_input_section()) | |
8269 | return true; | |
8270 | bool small1 | |
8271 | = (is1.is_input_section() | |
8272 | && (static_cast<const Powerpc_relobj<64, big_endian>*>(is1.relobj()) | |
8273 | ->has_small_toc_reloc())); | |
8274 | bool small2 | |
8275 | = (is2.is_input_section() | |
8276 | && (static_cast<const Powerpc_relobj<64, big_endian>*>(is2.relobj()) | |
8277 | ->has_small_toc_reloc())); | |
8278 | return small1 && !small2; | |
8279 | } | |
8280 | }; | |
8281 | ||
42cacb20 DE |
8282 | // Finalize the sections. |
8283 | ||
8284 | template<int size, bool big_endian> | |
8285 | void | |
d5b40221 DK |
8286 | Target_powerpc<size, big_endian>::do_finalize_sections( |
8287 | Layout* layout, | |
f59f41f3 | 8288 | const Input_objects*, |
ec4dbad3 | 8289 | Symbol_table* symtab) |
42cacb20 | 8290 | { |
c9824451 AM |
8291 | if (parameters->doing_static_link()) |
8292 | { | |
8293 | // At least some versions of glibc elf-init.o have a strong | |
8294 | // reference to __rela_iplt marker syms. A weak ref would be | |
8295 | // better.. | |
8296 | if (this->iplt_ != NULL) | |
8297 | { | |
8298 | Reloc_section* rel = this->iplt_->rel_plt(); | |
8299 | symtab->define_in_output_data("__rela_iplt_start", NULL, | |
8300 | Symbol_table::PREDEFINED, rel, 0, 0, | |
8301 | elfcpp::STT_NOTYPE, elfcpp::STB_GLOBAL, | |
8302 | elfcpp::STV_HIDDEN, 0, false, true); | |
8303 | symtab->define_in_output_data("__rela_iplt_end", NULL, | |
8304 | Symbol_table::PREDEFINED, rel, 0, 0, | |
8305 | elfcpp::STT_NOTYPE, elfcpp::STB_GLOBAL, | |
8306 | elfcpp::STV_HIDDEN, 0, true, true); | |
8307 | } | |
8308 | else | |
8309 | { | |
8310 | symtab->define_as_constant("__rela_iplt_start", NULL, | |
8311 | Symbol_table::PREDEFINED, 0, 0, | |
8312 | elfcpp::STT_NOTYPE, elfcpp::STB_GLOBAL, | |
8313 | elfcpp::STV_HIDDEN, 0, true, false); | |
8314 | symtab->define_as_constant("__rela_iplt_end", NULL, | |
8315 | Symbol_table::PREDEFINED, 0, 0, | |
8316 | elfcpp::STT_NOTYPE, elfcpp::STB_GLOBAL, | |
8317 | elfcpp::STV_HIDDEN, 0, true, false); | |
8318 | } | |
8319 | } | |
8320 | ||
ec4dbad3 AM |
8321 | if (size == 64) |
8322 | { | |
8323 | typedef Global_symbol_visitor_opd<big_endian> Symbol_visitor; | |
8324 | symtab->for_all_symbols<64, Symbol_visitor>(Symbol_visitor()); | |
ec661b9d AM |
8325 | |
8326 | if (!parameters->options().relocatable()) | |
8327 | { | |
8328 | this->define_save_restore_funcs(layout, symtab); | |
8329 | ||
8330 | // Annoyingly, we need to make these sections now whether or | |
8331 | // not we need them. If we delay until do_relax then we | |
8332 | // need to mess with the relaxation machinery checkpointing. | |
8333 | this->got_section(symtab, layout); | |
8334 | this->make_brlt_section(layout); | |
d8f5a274 AM |
8335 | |
8336 | if (parameters->options().toc_sort()) | |
8337 | { | |
8338 | Output_section* os = this->got_->output_section(); | |
8339 | if (os != NULL && os->input_sections().size() > 1) | |
8340 | std::stable_sort(os->input_sections().begin(), | |
8341 | os->input_sections().end(), | |
8342 | Sort_toc_sections<big_endian>()); | |
8343 | } | |
ec661b9d | 8344 | } |
ec4dbad3 AM |
8345 | } |
8346 | ||
42cacb20 | 8347 | // Fill in some more dynamic tags. |
c9269dff | 8348 | Output_data_dynamic* odyn = layout->dynamic_data(); |
c9824451 | 8349 | if (odyn != NULL) |
cf43a2fe | 8350 | { |
c9824451 AM |
8351 | const Reloc_section* rel_plt = (this->plt_ == NULL |
8352 | ? NULL | |
8353 | : this->plt_->rel_plt()); | |
8354 | layout->add_target_dynamic_tags(false, this->plt_, rel_plt, | |
8355 | this->rela_dyn_, true, size == 32); | |
8356 | ||
8357 | if (size == 32) | |
dd93cd0a | 8358 | { |
c9824451 AM |
8359 | if (this->got_ != NULL) |
8360 | { | |
8361 | this->got_->finalize_data_size(); | |
8362 | odyn->add_section_plus_offset(elfcpp::DT_PPC_GOT, | |
8363 | this->got_, this->got_->g_o_t()); | |
8364 | } | |
34e0882b AM |
8365 | if (this->has_tls_get_addr_opt_) |
8366 | odyn->add_constant(elfcpp::DT_PPC_OPT, elfcpp::PPC_OPT_TLS); | |
dd93cd0a | 8367 | } |
c9824451 | 8368 | else |
dd93cd0a | 8369 | { |
c9824451 AM |
8370 | if (this->glink_ != NULL) |
8371 | { | |
8372 | this->glink_->finalize_data_size(); | |
8373 | odyn->add_section_plus_offset(elfcpp::DT_PPC64_GLINK, | |
8374 | this->glink_, | |
9e390558 | 8375 | (this->glink_->pltresolve_size() |
c9824451 AM |
8376 | - 32)); |
8377 | } | |
34e0882b | 8378 | if (this->has_localentry0_ || this->has_tls_get_addr_opt_) |
7ee7ff70 | 8379 | odyn->add_constant(elfcpp::DT_PPC64_OPT, |
34e0882b AM |
8380 | ((this->has_localentry0_ |
8381 | ? elfcpp::PPC64_OPT_LOCALENTRY : 0) | |
8382 | | (this->has_tls_get_addr_opt_ | |
8383 | ? elfcpp::PPC64_OPT_TLS : 0))); | |
dd93cd0a | 8384 | } |
c9269dff | 8385 | } |
cf43a2fe | 8386 | |
42cacb20 DE |
8387 | // Emit any relocs we saved in an attempt to avoid generating COPY |
8388 | // relocs. | |
8389 | if (this->copy_relocs_.any_saved_relocs()) | |
8390 | this->copy_relocs_.emit(this->rela_dyn_section(layout)); | |
8391 | } | |
8392 | ||
5edad15d AM |
8393 | // Emit any saved relocs, and mark toc entries using any of these |
8394 | // relocs as not optimizable. | |
aba6bc71 | 8395 | |
5edad15d AM |
8396 | template<int sh_type, int size, bool big_endian> |
8397 | void | |
8398 | Powerpc_copy_relocs<sh_type, size, big_endian>::emit( | |
8399 | Output_data_reloc<sh_type, true, size, big_endian>* reloc_section) | |
aba6bc71 | 8400 | { |
5edad15d AM |
8401 | if (size == 64 |
8402 | && parameters->options().toc_optimize()) | |
8403 | { | |
8404 | for (typename Copy_relocs<sh_type, size, big_endian>:: | |
8405 | Copy_reloc_entries::iterator p = this->entries_.begin(); | |
8406 | p != this->entries_.end(); | |
8407 | ++p) | |
8408 | { | |
8409 | typename Copy_relocs<sh_type, size, big_endian>::Copy_reloc_entry& | |
8410 | entry = *p; | |
8411 | ||
8412 | // If the symbol is no longer defined in a dynamic object, | |
8413 | // then we emitted a COPY relocation. If it is still | |
8414 | // dynamic then we'll need dynamic relocations and thus | |
8415 | // can't optimize toc entries. | |
8416 | if (entry.sym_->is_from_dynobj()) | |
8417 | { | |
8418 | Powerpc_relobj<size, big_endian>* ppc_object | |
8419 | = static_cast<Powerpc_relobj<size, big_endian>*>(entry.relobj_); | |
8420 | if (entry.shndx_ == ppc_object->toc_shndx()) | |
8421 | ppc_object->set_no_toc_opt(entry.address_); | |
8422 | } | |
8423 | } | |
8424 | } | |
8425 | ||
8426 | Copy_relocs<sh_type, size, big_endian>::emit(reloc_section); | |
aba6bc71 AM |
8427 | } |
8428 | ||
3ea0a085 AM |
8429 | // Return the value to use for a branch relocation. |
8430 | ||
8431 | template<int size, bool big_endian> | |
1611bc4a | 8432 | bool |
3ea0a085 | 8433 | Target_powerpc<size, big_endian>::symval_for_branch( |
6c77229c | 8434 | const Symbol_table* symtab, |
3ea0a085 AM |
8435 | const Sized_symbol<size>* gsym, |
8436 | Powerpc_relobj<size, big_endian>* object, | |
1611bc4a | 8437 | Address *value, |
3ea0a085 AM |
8438 | unsigned int *dest_shndx) |
8439 | { | |
9055360d AM |
8440 | if (size == 32 || this->abiversion() >= 2) |
8441 | gold_unreachable(); | |
3ea0a085 | 8442 | *dest_shndx = 0; |
3ea0a085 AM |
8443 | |
8444 | // If the symbol is defined in an opd section, ie. is a function | |
8445 | // descriptor, use the function descriptor code entry address | |
8446 | Powerpc_relobj<size, big_endian>* symobj = object; | |
f3a0ed29 | 8447 | if (gsym != NULL |
0e123f69 AM |
8448 | && (gsym->source() != Symbol::FROM_OBJECT |
8449 | || gsym->object()->is_dynamic())) | |
1611bc4a | 8450 | return true; |
3ea0a085 AM |
8451 | if (gsym != NULL) |
8452 | symobj = static_cast<Powerpc_relobj<size, big_endian>*>(gsym->object()); | |
8453 | unsigned int shndx = symobj->opd_shndx(); | |
8454 | if (shndx == 0) | |
1611bc4a | 8455 | return true; |
3ea0a085 | 8456 | Address opd_addr = symobj->get_output_section_offset(shndx); |
a2d7bf59 | 8457 | if (opd_addr == invalid_address) |
1611bc4a | 8458 | return true; |
c6905c28 | 8459 | opd_addr += symobj->output_section_address(shndx); |
1611bc4a | 8460 | if (*value >= opd_addr && *value < opd_addr + symobj->section_size(shndx)) |
3ea0a085 AM |
8461 | { |
8462 | Address sec_off; | |
1611bc4a | 8463 | *dest_shndx = symobj->get_opd_ent(*value - opd_addr, &sec_off); |
6c77229c AM |
8464 | if (symtab->is_section_folded(symobj, *dest_shndx)) |
8465 | { | |
8466 | Section_id folded | |
8467 | = symtab->icf()->get_folded_section(symobj, *dest_shndx); | |
8468 | symobj = static_cast<Powerpc_relobj<size, big_endian>*>(folded.first); | |
8469 | *dest_shndx = folded.second; | |
8470 | } | |
3ea0a085 | 8471 | Address sec_addr = symobj->get_output_section_offset(*dest_shndx); |
1611bc4a AM |
8472 | if (sec_addr == invalid_address) |
8473 | return false; | |
8474 | ||
3ea0a085 | 8475 | sec_addr += symobj->output_section(*dest_shndx)->address(); |
1611bc4a | 8476 | *value = sec_addr + sec_off; |
3ea0a085 | 8477 | } |
1611bc4a | 8478 | return true; |
3ea0a085 AM |
8479 | } |
8480 | ||
42cacb20 DE |
8481 | // Perform a relocation. |
8482 | ||
8483 | template<int size, bool big_endian> | |
8484 | inline bool | |
8485 | Target_powerpc<size, big_endian>::Relocate::relocate( | |
d83ce4e3 | 8486 | const Relocate_info<size, big_endian>* relinfo, |
91a65d2f | 8487 | unsigned int, |
d83ce4e3 AM |
8488 | Target_powerpc* target, |
8489 | Output_section* os, | |
8490 | size_t relnum, | |
91a65d2f | 8491 | const unsigned char* preloc, |
d83ce4e3 AM |
8492 | const Sized_symbol<size>* gsym, |
8493 | const Symbol_value<size>* psymval, | |
8494 | unsigned char* view, | |
c9269dff AM |
8495 | Address address, |
8496 | section_size_type view_size) | |
42cacb20 | 8497 | { |
0e804863 ILT |
8498 | if (view == NULL) |
8499 | return true; | |
8500 | ||
34e0882b AM |
8501 | if (target->replace_tls_get_addr(gsym)) |
8502 | gsym = static_cast<const Sized_symbol<size>*>(target->tls_get_addr_opt()); | |
8503 | ||
91a65d2f AM |
8504 | const elfcpp::Rela<size, big_endian> rela(preloc); |
8505 | unsigned int r_type = elfcpp::elf_r_type<size>(rela.get_r_info()); | |
34e0882b | 8506 | switch (this->maybe_skip_tls_get_addr_call(target, r_type, gsym)) |
dd93cd0a | 8507 | { |
e3deeb9c AM |
8508 | case Track_tls::NOT_EXPECTED: |
8509 | gold_error_at_location(relinfo, relnum, rela.get_r_offset(), | |
8510 | _("__tls_get_addr call lacks marker reloc")); | |
8511 | break; | |
8512 | case Track_tls::EXPECTED: | |
8513 | // We have already complained. | |
8514 | break; | |
8515 | case Track_tls::SKIP: | |
8516 | return true; | |
8517 | case Track_tls::NORMAL: | |
8518 | break; | |
dd93cd0a | 8519 | } |
dd93cd0a | 8520 | |
42cacb20 | 8521 | typedef Powerpc_relocate_functions<size, big_endian> Reloc; |
dd93cd0a | 8522 | typedef typename elfcpp::Swap<32, big_endian>::Valtype Insn; |
0e123f69 | 8523 | typedef typename elfcpp::Rela<size, big_endian> Reltype; |
dcfc7dd4 AM |
8524 | // Offset from start of insn to d-field reloc. |
8525 | const int d_offset = big_endian ? 2 : 0; | |
8526 | ||
3ea0a085 AM |
8527 | Powerpc_relobj<size, big_endian>* const object |
8528 | = static_cast<Powerpc_relobj<size, big_endian>*>(relinfo->object); | |
dd93cd0a | 8529 | Address value = 0; |
0cfb0717 | 8530 | bool has_stub_value = false; |
7ee7ff70 | 8531 | bool localentry0 = false; |
e5d5f5ed | 8532 | unsigned int r_sym = elfcpp::elf_r_sym<size>(rela.get_r_info()); |
08be3224 AM |
8533 | bool has_plt_offset |
8534 | = (gsym != NULL | |
88b8e639 | 8535 | ? gsym->use_plt_offset(Scan::get_reference_flags(r_type, target)) |
08be3224 AM |
8536 | : object->local_has_plt_offset(r_sym)); |
8537 | if (has_plt_offset | |
8538 | && !is_plt16_reloc<size>(r_type) | |
b3ccdeb5 | 8539 | && (!psymval->is_ifunc_symbol() |
9055360d | 8540 | || Scan::reloc_needs_plt_for_ifunc(target, object, r_type, false))) |
dd93cd0a | 8541 | { |
9055360d AM |
8542 | if (size == 64 |
8543 | && gsym != NULL | |
8544 | && target->abiversion() >= 2 | |
8545 | && !parameters->options().output_is_position_independent() | |
8546 | && !is_branch_reloc(r_type)) | |
ec661b9d | 8547 | { |
faa2211d AM |
8548 | Address off = target->glink_section()->find_global_entry(gsym); |
8549 | if (off != invalid_address) | |
6ec65f28 AM |
8550 | { |
8551 | value = target->glink_section()->global_entry_address() + off; | |
8552 | has_stub_value = true; | |
8553 | } | |
ec661b9d | 8554 | } |
c9824451 | 8555 | else |
9055360d | 8556 | { |
64b5d6d7 AM |
8557 | Stub_table<size, big_endian>* stub_table = NULL; |
8558 | if (target->stub_tables().size() == 1) | |
8559 | stub_table = target->stub_tables()[0]; | |
8560 | if (stub_table == NULL | |
8561 | && !(size == 32 | |
8562 | && gsym != NULL | |
8563 | && !parameters->options().output_is_position_independent() | |
8564 | && !is_branch_reloc(r_type))) | |
8565 | stub_table = object->stub_table(relinfo->data_shndx); | |
9055360d AM |
8566 | if (stub_table == NULL) |
8567 | { | |
64b5d6d7 AM |
8568 | // This is a ref from a data section to an ifunc symbol, |
8569 | // or a non-branch reloc for which we always want to use | |
8570 | // one set of stubs for resolving function addresses. | |
9055360d AM |
8571 | if (target->stub_tables().size() != 0) |
8572 | stub_table = target->stub_tables()[0]; | |
8573 | } | |
faa2211d AM |
8574 | if (stub_table != NULL) |
8575 | { | |
7e57d19e | 8576 | const typename Stub_table<size, big_endian>::Plt_stub_ent* ent; |
faa2211d | 8577 | if (gsym != NULL) |
7e57d19e | 8578 | ent = stub_table->find_plt_call_entry(object, gsym, r_type, |
faa2211d AM |
8579 | rela.get_r_addend()); |
8580 | else | |
7e57d19e | 8581 | ent = stub_table->find_plt_call_entry(object, r_sym, r_type, |
faa2211d | 8582 | rela.get_r_addend()); |
7e57d19e | 8583 | if (ent != NULL) |
faa2211d | 8584 | { |
7e57d19e AM |
8585 | value = stub_table->stub_address() + ent->off_; |
8586 | const int reloc_size = elfcpp::Elf_sizes<size>::rela_size; | |
8587 | elfcpp::Shdr<size, big_endian> shdr(relinfo->reloc_shdr); | |
8588 | size_t reloc_count = shdr.get_sh_size() / reloc_size; | |
8589 | if (size == 64 | |
8590 | && ent->r2save_ | |
8591 | && relnum + 1 < reloc_count) | |
8592 | { | |
8593 | Reltype next_rela(preloc + reloc_size); | |
8594 | if (elfcpp::elf_r_type<size>(next_rela.get_r_info()) | |
8595 | == elfcpp::R_PPC64_TOCSAVE | |
8596 | && next_rela.get_r_offset() == rela.get_r_offset() + 4) | |
8597 | value += 4; | |
8598 | } | |
7ee7ff70 | 8599 | localentry0 = ent->localentry0_; |
faa2211d AM |
8600 | has_stub_value = true; |
8601 | } | |
8602 | } | |
9055360d | 8603 | } |
faa2211d AM |
8604 | // We don't care too much about bogus debug references to |
8605 | // non-local functions, but otherwise there had better be a plt | |
8606 | // call stub or global entry stub as appropriate. | |
8607 | gold_assert(has_stub_value || !(os->flags() & elfcpp::SHF_ALLOC)); | |
dd93cd0a | 8608 | } |
cf43a2fe | 8609 | |
08be3224 AM |
8610 | if (has_plt_offset && is_plt16_reloc<size>(r_type)) |
8611 | { | |
8612 | const Output_data_plt_powerpc<size, big_endian>* plt; | |
8613 | if (gsym) | |
8614 | value = target->plt_off(gsym, &plt); | |
8615 | else | |
8616 | value = target->plt_off(object, r_sym, &plt); | |
8617 | value += plt->address(); | |
8618 | ||
8619 | if (size == 64) | |
8620 | value -= (target->got_section()->output_section()->address() | |
8621 | + object->toc_base_offset()); | |
8622 | else if (parameters->options().output_is_position_independent()) | |
8623 | { | |
8624 | if (rela.get_r_addend() >= 32768) | |
8625 | { | |
8626 | unsigned int got2 = object->got2_shndx(); | |
8627 | value -= (object->get_output_section_offset(got2) | |
8628 | + object->output_section(got2)->address() | |
8629 | + rela.get_r_addend()); | |
8630 | } | |
8631 | else | |
8632 | value -= (target->got_section()->address() | |
8633 | + target->got_section()->g_o_t()); | |
8634 | } | |
8635 | } | |
8636 | else if (r_type == elfcpp::R_POWERPC_GOT16 | |
8637 | || r_type == elfcpp::R_POWERPC_GOT16_LO | |
8638 | || r_type == elfcpp::R_POWERPC_GOT16_HI | |
8639 | || r_type == elfcpp::R_POWERPC_GOT16_HA | |
8640 | || r_type == elfcpp::R_PPC64_GOT16_DS | |
8641 | || r_type == elfcpp::R_PPC64_GOT16_LO_DS) | |
42cacb20 | 8642 | { |
cf43a2fe AM |
8643 | if (gsym != NULL) |
8644 | { | |
8645 | gold_assert(gsym->has_got_offset(GOT_TYPE_STANDARD)); | |
8646 | value = gsym->got_offset(GOT_TYPE_STANDARD); | |
8647 | } | |
8648 | else | |
8649 | { | |
cf43a2fe AM |
8650 | gold_assert(object->local_has_got_offset(r_sym, GOT_TYPE_STANDARD)); |
8651 | value = object->local_got_offset(r_sym, GOT_TYPE_STANDARD); | |
8652 | } | |
dd93cd0a | 8653 | value -= target->got_section()->got_base_offset(object); |
cf43a2fe AM |
8654 | } |
8655 | else if (r_type == elfcpp::R_PPC64_TOC) | |
8656 | { | |
c9269dff | 8657 | value = (target->got_section()->output_section()->address() |
dd93cd0a | 8658 | + object->toc_base_offset()); |
cf43a2fe AM |
8659 | } |
8660 | else if (gsym != NULL | |
8661 | && (r_type == elfcpp::R_POWERPC_REL24 | |
8662 | || r_type == elfcpp::R_PPC_PLTREL24) | |
0cfb0717 | 8663 | && has_stub_value) |
cf43a2fe | 8664 | { |
c9269dff AM |
8665 | if (size == 64) |
8666 | { | |
8667 | typedef typename elfcpp::Swap<32, big_endian>::Valtype Valtype; | |
8668 | Valtype* wv = reinterpret_cast<Valtype*>(view); | |
34e0882b AM |
8669 | bool can_plt_call = localentry0 || target->is_tls_get_addr_opt(gsym); |
8670 | if (!can_plt_call && rela.get_r_offset() + 8 <= view_size) | |
c9269dff | 8671 | { |
3ea0a085 | 8672 | Valtype insn = elfcpp::Swap<32, big_endian>::readval(wv); |
c9269dff | 8673 | Valtype insn2 = elfcpp::Swap<32, big_endian>::readval(wv + 1); |
3ea0a085 AM |
8674 | if ((insn & 1) != 0 |
8675 | && (insn2 == nop | |
8676 | || insn2 == cror_15_15_15 || insn2 == cror_31_31_31)) | |
c9269dff | 8677 | { |
b4f7960d AM |
8678 | elfcpp::Swap<32, big_endian>:: |
8679 | writeval(wv + 1, ld_2_1 + target->stk_toc()); | |
c9269dff AM |
8680 | can_plt_call = true; |
8681 | } | |
8682 | } | |
8683 | if (!can_plt_call) | |
3ea0a085 AM |
8684 | { |
8685 | // If we don't have a branch and link followed by a nop, | |
8686 | // we can't go via the plt because there is no place to | |
8687 | // put a toc restoring instruction. | |
8688 | // Unless we know we won't be returning. | |
8689 | if (strcmp(gsym->name(), "__libc_start_main") == 0) | |
8690 | can_plt_call = true; | |
8691 | } | |
8692 | if (!can_plt_call) | |
8693 | { | |
ba8ca3e7 AM |
8694 | // g++ as of 20130507 emits self-calls without a |
8695 | // following nop. This is arguably wrong since we have | |
8696 | // conflicting information. On the one hand a global | |
8697 | // symbol and on the other a local call sequence, but | |
8698 | // don't error for this special case. | |
8699 | // It isn't possible to cheaply verify we have exactly | |
8700 | // such a call. Allow all calls to the same section. | |
3ea0a085 | 8701 | bool ok = false; |
c9824451 | 8702 | Address code = value; |
3ea0a085 AM |
8703 | if (gsym->source() == Symbol::FROM_OBJECT |
8704 | && gsym->object() == object) | |
8705 | { | |
9055360d AM |
8706 | unsigned int dest_shndx = 0; |
8707 | if (target->abiversion() < 2) | |
8708 | { | |
8709 | Address addend = rela.get_r_addend(); | |
1611bc4a AM |
8710 | code = psymval->value(object, addend); |
8711 | target->symval_for_branch(relinfo->symtab, gsym, object, | |
8712 | &code, &dest_shndx); | |
9055360d | 8713 | } |
3ea0a085 AM |
8714 | bool is_ordinary; |
8715 | if (dest_shndx == 0) | |
8716 | dest_shndx = gsym->shndx(&is_ordinary); | |
8717 | ok = dest_shndx == relinfo->data_shndx; | |
8718 | } | |
8719 | if (!ok) | |
c9824451 AM |
8720 | { |
8721 | gold_error_at_location(relinfo, relnum, rela.get_r_offset(), | |
8722 | _("call lacks nop, can't restore toc; " | |
8723 | "recompile with -fPIC")); | |
8724 | value = code; | |
8725 | } | |
3ea0a085 | 8726 | } |
c9269dff | 8727 | } |
cf43a2fe | 8728 | } |
dd93cd0a AM |
8729 | else if (r_type == elfcpp::R_POWERPC_GOT_TLSGD16 |
8730 | || r_type == elfcpp::R_POWERPC_GOT_TLSGD16_LO | |
8731 | || r_type == elfcpp::R_POWERPC_GOT_TLSGD16_HI | |
8732 | || r_type == elfcpp::R_POWERPC_GOT_TLSGD16_HA) | |
8733 | { | |
8734 | // First instruction of a global dynamic sequence, arg setup insn. | |
8735 | const bool final = gsym == NULL || gsym->final_value_is_known(); | |
8736 | const tls::Tls_optimization tls_type = target->optimize_tls_gd(final); | |
8737 | enum Got_type got_type = GOT_TYPE_STANDARD; | |
8738 | if (tls_type == tls::TLSOPT_NONE) | |
8739 | got_type = GOT_TYPE_TLSGD; | |
8740 | else if (tls_type == tls::TLSOPT_TO_IE) | |
8741 | got_type = GOT_TYPE_TPREL; | |
8742 | if (got_type != GOT_TYPE_STANDARD) | |
8743 | { | |
8744 | if (gsym != NULL) | |
8745 | { | |
8746 | gold_assert(gsym->has_got_offset(got_type)); | |
8747 | value = gsym->got_offset(got_type); | |
8748 | } | |
8749 | else | |
8750 | { | |
dd93cd0a AM |
8751 | gold_assert(object->local_has_got_offset(r_sym, got_type)); |
8752 | value = object->local_got_offset(r_sym, got_type); | |
8753 | } | |
8754 | value -= target->got_section()->got_base_offset(object); | |
8755 | } | |
8756 | if (tls_type == tls::TLSOPT_TO_IE) | |
8757 | { | |
8758 | if (r_type == elfcpp::R_POWERPC_GOT_TLSGD16 | |
8759 | || r_type == elfcpp::R_POWERPC_GOT_TLSGD16_LO) | |
8760 | { | |
dcfc7dd4 | 8761 | Insn* iview = reinterpret_cast<Insn*>(view - d_offset); |
dd93cd0a AM |
8762 | Insn insn = elfcpp::Swap<32, big_endian>::readval(iview); |
8763 | insn &= (1 << 26) - (1 << 16); // extract rt,ra from addi | |
8764 | if (size == 32) | |
8765 | insn |= 32 << 26; // lwz | |
8766 | else | |
8767 | insn |= 58 << 26; // ld | |
8768 | elfcpp::Swap<32, big_endian>::writeval(iview, insn); | |
8769 | } | |
8770 | r_type += (elfcpp::R_POWERPC_GOT_TPREL16 | |
8771 | - elfcpp::R_POWERPC_GOT_TLSGD16); | |
8772 | } | |
8773 | else if (tls_type == tls::TLSOPT_TO_LE) | |
8774 | { | |
8775 | if (r_type == elfcpp::R_POWERPC_GOT_TLSGD16 | |
8776 | || r_type == elfcpp::R_POWERPC_GOT_TLSGD16_LO) | |
8777 | { | |
dcfc7dd4 | 8778 | Insn* iview = reinterpret_cast<Insn*>(view - d_offset); |
0f81d3f0 AM |
8779 | Insn insn = elfcpp::Swap<32, big_endian>::readval(iview); |
8780 | insn &= (1 << 26) - (1 << 21); // extract rt | |
dd93cd0a | 8781 | if (size == 32) |
0f81d3f0 AM |
8782 | insn |= addis_0_2; |
8783 | else | |
8784 | insn |= addis_0_13; | |
dd93cd0a AM |
8785 | elfcpp::Swap<32, big_endian>::writeval(iview, insn); |
8786 | r_type = elfcpp::R_POWERPC_TPREL16_HA; | |
8787 | value = psymval->value(object, rela.get_r_addend()); | |
8788 | } | |
8789 | else | |
8790 | { | |
dcfc7dd4 | 8791 | Insn* iview = reinterpret_cast<Insn*>(view - d_offset); |
dd93cd0a AM |
8792 | Insn insn = nop; |
8793 | elfcpp::Swap<32, big_endian>::writeval(iview, insn); | |
8794 | r_type = elfcpp::R_POWERPC_NONE; | |
8795 | } | |
8796 | } | |
8797 | } | |
8798 | else if (r_type == elfcpp::R_POWERPC_GOT_TLSLD16 | |
8799 | || r_type == elfcpp::R_POWERPC_GOT_TLSLD16_LO | |
8800 | || r_type == elfcpp::R_POWERPC_GOT_TLSLD16_HI | |
8801 | || r_type == elfcpp::R_POWERPC_GOT_TLSLD16_HA) | |
8802 | { | |
8803 | // First instruction of a local dynamic sequence, arg setup insn. | |
8804 | const tls::Tls_optimization tls_type = target->optimize_tls_ld(); | |
8805 | if (tls_type == tls::TLSOPT_NONE) | |
8806 | { | |
8807 | value = target->tlsld_got_offset(); | |
8808 | value -= target->got_section()->got_base_offset(object); | |
8809 | } | |
8810 | else | |
8811 | { | |
8812 | gold_assert(tls_type == tls::TLSOPT_TO_LE); | |
8813 | if (r_type == elfcpp::R_POWERPC_GOT_TLSLD16 | |
8814 | || r_type == elfcpp::R_POWERPC_GOT_TLSLD16_LO) | |
8815 | { | |
dcfc7dd4 | 8816 | Insn* iview = reinterpret_cast<Insn*>(view - d_offset); |
0f81d3f0 AM |
8817 | Insn insn = elfcpp::Swap<32, big_endian>::readval(iview); |
8818 | insn &= (1 << 26) - (1 << 21); // extract rt | |
dd93cd0a | 8819 | if (size == 32) |
0f81d3f0 AM |
8820 | insn |= addis_0_2; |
8821 | else | |
8822 | insn |= addis_0_13; | |
dd93cd0a AM |
8823 | elfcpp::Swap<32, big_endian>::writeval(iview, insn); |
8824 | r_type = elfcpp::R_POWERPC_TPREL16_HA; | |
7404fe1b | 8825 | value = dtp_offset; |
dd93cd0a AM |
8826 | } |
8827 | else | |
8828 | { | |
dcfc7dd4 | 8829 | Insn* iview = reinterpret_cast<Insn*>(view - d_offset); |
dd93cd0a AM |
8830 | Insn insn = nop; |
8831 | elfcpp::Swap<32, big_endian>::writeval(iview, insn); | |
8832 | r_type = elfcpp::R_POWERPC_NONE; | |
8833 | } | |
8834 | } | |
8835 | } | |
8836 | else if (r_type == elfcpp::R_POWERPC_GOT_DTPREL16 | |
8837 | || r_type == elfcpp::R_POWERPC_GOT_DTPREL16_LO | |
8838 | || r_type == elfcpp::R_POWERPC_GOT_DTPREL16_HI | |
8839 | || r_type == elfcpp::R_POWERPC_GOT_DTPREL16_HA) | |
8840 | { | |
8841 | // Accesses relative to a local dynamic sequence address, | |
8842 | // no optimisation here. | |
8843 | if (gsym != NULL) | |
8844 | { | |
8845 | gold_assert(gsym->has_got_offset(GOT_TYPE_DTPREL)); | |
8846 | value = gsym->got_offset(GOT_TYPE_DTPREL); | |
8847 | } | |
8848 | else | |
8849 | { | |
dd93cd0a AM |
8850 | gold_assert(object->local_has_got_offset(r_sym, GOT_TYPE_DTPREL)); |
8851 | value = object->local_got_offset(r_sym, GOT_TYPE_DTPREL); | |
8852 | } | |
8853 | value -= target->got_section()->got_base_offset(object); | |
8854 | } | |
8855 | else if (r_type == elfcpp::R_POWERPC_GOT_TPREL16 | |
8856 | || r_type == elfcpp::R_POWERPC_GOT_TPREL16_LO | |
8857 | || r_type == elfcpp::R_POWERPC_GOT_TPREL16_HI | |
8858 | || r_type == elfcpp::R_POWERPC_GOT_TPREL16_HA) | |
8859 | { | |
8860 | // First instruction of initial exec sequence. | |
8861 | const bool final = gsym == NULL || gsym->final_value_is_known(); | |
8862 | const tls::Tls_optimization tls_type = target->optimize_tls_ie(final); | |
8863 | if (tls_type == tls::TLSOPT_NONE) | |
8864 | { | |
8865 | if (gsym != NULL) | |
8866 | { | |
8867 | gold_assert(gsym->has_got_offset(GOT_TYPE_TPREL)); | |
8868 | value = gsym->got_offset(GOT_TYPE_TPREL); | |
8869 | } | |
8870 | else | |
8871 | { | |
dd93cd0a AM |
8872 | gold_assert(object->local_has_got_offset(r_sym, GOT_TYPE_TPREL)); |
8873 | value = object->local_got_offset(r_sym, GOT_TYPE_TPREL); | |
8874 | } | |
8875 | value -= target->got_section()->got_base_offset(object); | |
8876 | } | |
8877 | else | |
8878 | { | |
8879 | gold_assert(tls_type == tls::TLSOPT_TO_LE); | |
8880 | if (r_type == elfcpp::R_POWERPC_GOT_TPREL16 | |
8881 | || r_type == elfcpp::R_POWERPC_GOT_TPREL16_LO) | |
8882 | { | |
dcfc7dd4 | 8883 | Insn* iview = reinterpret_cast<Insn*>(view - d_offset); |
dd93cd0a AM |
8884 | Insn insn = elfcpp::Swap<32, big_endian>::readval(iview); |
8885 | insn &= (1 << 26) - (1 << 21); // extract rt from ld | |
8886 | if (size == 32) | |
8887 | insn |= addis_0_2; | |
8888 | else | |
8889 | insn |= addis_0_13; | |
8890 | elfcpp::Swap<32, big_endian>::writeval(iview, insn); | |
8891 | r_type = elfcpp::R_POWERPC_TPREL16_HA; | |
8892 | value = psymval->value(object, rela.get_r_addend()); | |
8893 | } | |
8894 | else | |
8895 | { | |
dcfc7dd4 | 8896 | Insn* iview = reinterpret_cast<Insn*>(view - d_offset); |
dd93cd0a AM |
8897 | Insn insn = nop; |
8898 | elfcpp::Swap<32, big_endian>::writeval(iview, insn); | |
8899 | r_type = elfcpp::R_POWERPC_NONE; | |
8900 | } | |
8901 | } | |
8902 | } | |
8903 | else if ((size == 64 && r_type == elfcpp::R_PPC64_TLSGD) | |
8904 | || (size == 32 && r_type == elfcpp::R_PPC_TLSGD)) | |
8905 | { | |
8906 | // Second instruction of a global dynamic sequence, | |
8907 | // the __tls_get_addr call | |
e3deeb9c | 8908 | this->expect_tls_get_addr_call(relinfo, relnum, rela.get_r_offset()); |
dd93cd0a AM |
8909 | const bool final = gsym == NULL || gsym->final_value_is_known(); |
8910 | const tls::Tls_optimization tls_type = target->optimize_tls_gd(final); | |
8911 | if (tls_type != tls::TLSOPT_NONE) | |
8912 | { | |
8913 | if (tls_type == tls::TLSOPT_TO_IE) | |
8914 | { | |
8915 | Insn* iview = reinterpret_cast<Insn*>(view); | |
8916 | Insn insn = add_3_3_13; | |
8917 | if (size == 32) | |
8918 | insn = add_3_3_2; | |
8919 | elfcpp::Swap<32, big_endian>::writeval(iview, insn); | |
8920 | r_type = elfcpp::R_POWERPC_NONE; | |
8921 | } | |
8922 | else | |
8923 | { | |
8924 | Insn* iview = reinterpret_cast<Insn*>(view); | |
8925 | Insn insn = addi_3_3; | |
8926 | elfcpp::Swap<32, big_endian>::writeval(iview, insn); | |
8927 | r_type = elfcpp::R_POWERPC_TPREL16_LO; | |
dcfc7dd4 | 8928 | view += d_offset; |
dd93cd0a AM |
8929 | value = psymval->value(object, rela.get_r_addend()); |
8930 | } | |
e3deeb9c | 8931 | this->skip_next_tls_get_addr_call(); |
dd93cd0a AM |
8932 | } |
8933 | } | |
8934 | else if ((size == 64 && r_type == elfcpp::R_PPC64_TLSLD) | |
8935 | || (size == 32 && r_type == elfcpp::R_PPC_TLSLD)) | |
8936 | { | |
8937 | // Second instruction of a local dynamic sequence, | |
8938 | // the __tls_get_addr call | |
e3deeb9c | 8939 | this->expect_tls_get_addr_call(relinfo, relnum, rela.get_r_offset()); |
dd93cd0a AM |
8940 | const tls::Tls_optimization tls_type = target->optimize_tls_ld(); |
8941 | if (tls_type == tls::TLSOPT_TO_LE) | |
8942 | { | |
8943 | Insn* iview = reinterpret_cast<Insn*>(view); | |
8944 | Insn insn = addi_3_3; | |
8945 | elfcpp::Swap<32, big_endian>::writeval(iview, insn); | |
e3deeb9c | 8946 | this->skip_next_tls_get_addr_call(); |
dd93cd0a | 8947 | r_type = elfcpp::R_POWERPC_TPREL16_LO; |
dcfc7dd4 | 8948 | view += d_offset; |
7404fe1b | 8949 | value = dtp_offset; |
dd93cd0a AM |
8950 | } |
8951 | } | |
8952 | else if (r_type == elfcpp::R_POWERPC_TLS) | |
8953 | { | |
8954 | // Second instruction of an initial exec sequence | |
8955 | const bool final = gsym == NULL || gsym->final_value_is_known(); | |
8956 | const tls::Tls_optimization tls_type = target->optimize_tls_ie(final); | |
8957 | if (tls_type == tls::TLSOPT_TO_LE) | |
8958 | { | |
8959 | Insn* iview = reinterpret_cast<Insn*>(view); | |
8960 | Insn insn = elfcpp::Swap<32, big_endian>::readval(iview); | |
8961 | unsigned int reg = size == 32 ? 2 : 13; | |
8962 | insn = at_tls_transform(insn, reg); | |
8963 | gold_assert(insn != 0); | |
8964 | elfcpp::Swap<32, big_endian>::writeval(iview, insn); | |
8965 | r_type = elfcpp::R_POWERPC_TPREL16_LO; | |
dcfc7dd4 | 8966 | view += d_offset; |
dd93cd0a AM |
8967 | value = psymval->value(object, rela.get_r_addend()); |
8968 | } | |
8969 | } | |
0cfb0717 | 8970 | else if (!has_stub_value) |
cf43a2fe | 8971 | { |
dd93cd0a | 8972 | Address addend = 0; |
08be3224 AM |
8973 | if (!(size == 32 |
8974 | && (r_type == elfcpp::R_PPC_PLTREL24 | |
8975 | || r_type == elfcpp::R_POWERPC_PLT16_LO | |
8976 | || r_type == elfcpp::R_POWERPC_PLT16_HI | |
8977 | || r_type == elfcpp::R_POWERPC_PLT16_HA))) | |
cf43a2fe | 8978 | addend = rela.get_r_addend(); |
c9824451 | 8979 | value = psymval->value(object, addend); |
dd93cd0a | 8980 | if (size == 64 && is_branch_reloc(r_type)) |
9055360d AM |
8981 | { |
8982 | if (target->abiversion() >= 2) | |
8983 | { | |
8984 | if (gsym != NULL) | |
8985 | value += object->ppc64_local_entry_offset(gsym); | |
8986 | else | |
8987 | value += object->ppc64_local_entry_offset(r_sym); | |
8988 | } | |
8989 | else | |
1611bc4a AM |
8990 | { |
8991 | unsigned int dest_shndx; | |
8992 | target->symval_for_branch(relinfo->symtab, gsym, object, | |
8993 | &value, &dest_shndx); | |
8994 | } | |
9055360d | 8995 | } |
cbcb23fa | 8996 | Address max_branch_offset = max_branch_delta(r_type); |
ec661b9d AM |
8997 | if (max_branch_offset != 0 |
8998 | && value - address + max_branch_offset >= 2 * max_branch_offset) | |
8999 | { | |
9000 | Stub_table<size, big_endian>* stub_table | |
9001 | = object->stub_table(relinfo->data_shndx); | |
0cfdc767 AM |
9002 | if (stub_table != NULL) |
9003 | { | |
9004 | Address off = stub_table->find_long_branch_entry(object, value); | |
9005 | if (off != invalid_address) | |
0cfb0717 AM |
9006 | { |
9007 | value = (stub_table->stub_address() + stub_table->plt_size() | |
9008 | + off); | |
9009 | has_stub_value = true; | |
9010 | } | |
0cfdc767 | 9011 | } |
ec661b9d | 9012 | } |
42cacb20 DE |
9013 | } |
9014 | ||
42cacb20 DE |
9015 | switch (r_type) |
9016 | { | |
dd93cd0a AM |
9017 | case elfcpp::R_PPC64_REL64: |
9018 | case elfcpp::R_POWERPC_REL32: | |
9019 | case elfcpp::R_POWERPC_REL24: | |
9020 | case elfcpp::R_PPC_PLTREL24: | |
9021 | case elfcpp::R_PPC_LOCAL24PC: | |
9022 | case elfcpp::R_POWERPC_REL16: | |
9023 | case elfcpp::R_POWERPC_REL16_LO: | |
9024 | case elfcpp::R_POWERPC_REL16_HI: | |
9025 | case elfcpp::R_POWERPC_REL16_HA: | |
a680de9a | 9026 | case elfcpp::R_POWERPC_REL16DX_HA: |
dd93cd0a AM |
9027 | case elfcpp::R_POWERPC_REL14: |
9028 | case elfcpp::R_POWERPC_REL14_BRTAKEN: | |
9029 | case elfcpp::R_POWERPC_REL14_BRNTAKEN: | |
9030 | value -= address; | |
9031 | break; | |
9032 | ||
42cacb20 DE |
9033 | case elfcpp::R_PPC64_TOC16: |
9034 | case elfcpp::R_PPC64_TOC16_LO: | |
9035 | case elfcpp::R_PPC64_TOC16_HI: | |
9036 | case elfcpp::R_PPC64_TOC16_HA: | |
9037 | case elfcpp::R_PPC64_TOC16_DS: | |
9038 | case elfcpp::R_PPC64_TOC16_LO_DS: | |
cf43a2fe | 9039 | // Subtract the TOC base address. |
c9269dff | 9040 | value -= (target->got_section()->output_section()->address() |
dd93cd0a | 9041 | + object->toc_base_offset()); |
42cacb20 DE |
9042 | break; |
9043 | ||
cf43a2fe AM |
9044 | case elfcpp::R_POWERPC_SECTOFF: |
9045 | case elfcpp::R_POWERPC_SECTOFF_LO: | |
9046 | case elfcpp::R_POWERPC_SECTOFF_HI: | |
9047 | case elfcpp::R_POWERPC_SECTOFF_HA: | |
9048 | case elfcpp::R_PPC64_SECTOFF_DS: | |
9049 | case elfcpp::R_PPC64_SECTOFF_LO_DS: | |
9050 | if (os != NULL) | |
9051 | value -= os->address(); | |
42cacb20 DE |
9052 | break; |
9053 | ||
dd93cd0a AM |
9054 | case elfcpp::R_PPC64_TPREL16_DS: |
9055 | case elfcpp::R_PPC64_TPREL16_LO_DS: | |
f9c6b907 AM |
9056 | case elfcpp::R_PPC64_TPREL16_HIGH: |
9057 | case elfcpp::R_PPC64_TPREL16_HIGHA: | |
dd93cd0a | 9058 | if (size != 64) |
f9c6b907 | 9059 | // R_PPC_TLSGD, R_PPC_TLSLD, R_PPC_EMB_RELST_LO, R_PPC_EMB_RELST_HI |
dd93cd0a | 9060 | break; |
d8e90251 | 9061 | // Fall through. |
dd93cd0a AM |
9062 | case elfcpp::R_POWERPC_TPREL16: |
9063 | case elfcpp::R_POWERPC_TPREL16_LO: | |
9064 | case elfcpp::R_POWERPC_TPREL16_HI: | |
9065 | case elfcpp::R_POWERPC_TPREL16_HA: | |
9066 | case elfcpp::R_POWERPC_TPREL: | |
9067 | case elfcpp::R_PPC64_TPREL16_HIGHER: | |
9068 | case elfcpp::R_PPC64_TPREL16_HIGHERA: | |
9069 | case elfcpp::R_PPC64_TPREL16_HIGHEST: | |
9070 | case elfcpp::R_PPC64_TPREL16_HIGHESTA: | |
9071 | // tls symbol values are relative to tls_segment()->vaddr() | |
9072 | value -= tp_offset; | |
9073 | break; | |
9074 | ||
9075 | case elfcpp::R_PPC64_DTPREL16_DS: | |
9076 | case elfcpp::R_PPC64_DTPREL16_LO_DS: | |
9077 | case elfcpp::R_PPC64_DTPREL16_HIGHER: | |
9078 | case elfcpp::R_PPC64_DTPREL16_HIGHERA: | |
9079 | case elfcpp::R_PPC64_DTPREL16_HIGHEST: | |
9080 | case elfcpp::R_PPC64_DTPREL16_HIGHESTA: | |
9081 | if (size != 64) | |
9082 | // R_PPC_EMB_NADDR32, R_PPC_EMB_NADDR16, R_PPC_EMB_NADDR16_LO | |
9083 | // R_PPC_EMB_NADDR16_HI, R_PPC_EMB_NADDR16_HA, R_PPC_EMB_SDAI16 | |
9084 | break; | |
d8e90251 | 9085 | // Fall through. |
dd93cd0a AM |
9086 | case elfcpp::R_POWERPC_DTPREL16: |
9087 | case elfcpp::R_POWERPC_DTPREL16_LO: | |
9088 | case elfcpp::R_POWERPC_DTPREL16_HI: | |
9089 | case elfcpp::R_POWERPC_DTPREL16_HA: | |
9090 | case elfcpp::R_POWERPC_DTPREL: | |
f9c6b907 AM |
9091 | case elfcpp::R_PPC64_DTPREL16_HIGH: |
9092 | case elfcpp::R_PPC64_DTPREL16_HIGHA: | |
dd93cd0a AM |
9093 | // tls symbol values are relative to tls_segment()->vaddr() |
9094 | value -= dtp_offset; | |
9095 | break; | |
9096 | ||
45965137 AM |
9097 | case elfcpp::R_PPC64_ADDR64_LOCAL: |
9098 | if (gsym != NULL) | |
9099 | value += object->ppc64_local_entry_offset(gsym); | |
9100 | else | |
9101 | value += object->ppc64_local_entry_offset(r_sym); | |
9102 | break; | |
9103 | ||
42cacb20 DE |
9104 | default: |
9105 | break; | |
9106 | } | |
9107 | ||
dd93cd0a | 9108 | Insn branch_bit = 0; |
42cacb20 DE |
9109 | switch (r_type) |
9110 | { | |
dd93cd0a AM |
9111 | case elfcpp::R_POWERPC_ADDR14_BRTAKEN: |
9112 | case elfcpp::R_POWERPC_REL14_BRTAKEN: | |
9113 | branch_bit = 1 << 21; | |
d8e90251 | 9114 | // Fall through. |
dd93cd0a AM |
9115 | case elfcpp::R_POWERPC_ADDR14_BRNTAKEN: |
9116 | case elfcpp::R_POWERPC_REL14_BRNTAKEN: | |
9117 | { | |
9118 | Insn* iview = reinterpret_cast<Insn*>(view); | |
9119 | Insn insn = elfcpp::Swap<32, big_endian>::readval(iview); | |
9120 | insn &= ~(1 << 21); | |
9121 | insn |= branch_bit; | |
9122 | if (this->is_isa_v2) | |
9123 | { | |
9124 | // Set 'a' bit. This is 0b00010 in BO field for branch | |
9125 | // on CR(BI) insns (BO == 001at or 011at), and 0b01000 | |
9126 | // for branch on CTR insns (BO == 1a00t or 1a01t). | |
9127 | if ((insn & (0x14 << 21)) == (0x04 << 21)) | |
9128 | insn |= 0x02 << 21; | |
9129 | else if ((insn & (0x14 << 21)) == (0x10 << 21)) | |
9130 | insn |= 0x08 << 21; | |
9131 | else | |
9132 | break; | |
9133 | } | |
9134 | else | |
9135 | { | |
9136 | // Invert 'y' bit if not the default. | |
9137 | if (static_cast<Signed_address>(value) < 0) | |
9138 | insn ^= 1 << 21; | |
9139 | } | |
9140 | elfcpp::Swap<32, big_endian>::writeval(iview, insn); | |
9141 | } | |
9142 | break; | |
9143 | ||
08be3224 AM |
9144 | case elfcpp::R_POWERPC_PLT16_HA: |
9145 | if (size == 32 | |
9146 | && !parameters->options().output_is_position_independent()) | |
9147 | { | |
9148 | Insn* iview = reinterpret_cast<Insn*>(view - d_offset); | |
9149 | Insn insn = elfcpp::Swap<32, big_endian>::readval(iview); | |
9150 | ||
9151 | // Convert addis to lis. | |
9152 | if ((insn & (0x3f << 26)) == 15u << 26 | |
9153 | && (insn & (0x1f << 16)) != 0) | |
9154 | { | |
9155 | insn &= ~(0x1f << 16); | |
9156 | elfcpp::Swap<32, big_endian>::writeval(iview, insn); | |
9157 | } | |
9158 | } | |
9159 | break; | |
9160 | ||
dd93cd0a AM |
9161 | default: |
9162 | break; | |
9163 | } | |
9164 | ||
aba6bc71 AM |
9165 | if (size == 64) |
9166 | { | |
aba6bc71 AM |
9167 | switch (r_type) |
9168 | { | |
9169 | default: | |
9170 | break; | |
9171 | ||
5edad15d AM |
9172 | // Multi-instruction sequences that access the GOT/TOC can |
9173 | // be optimized, eg. | |
9174 | // addis ra,r2,x@got@ha; ld rb,x@got@l(ra); | |
9175 | // to addis ra,r2,x@toc@ha; addi rb,ra,x@toc@l; | |
9176 | // and | |
9177 | // addis ra,r2,0; addi rb,ra,x@toc@l; | |
9178 | // to nop; addi rb,r2,x@toc; | |
9179 | // FIXME: the @got sequence shown above is not yet | |
9180 | // optimized. Note that gcc as of 2017-01-07 doesn't use | |
9181 | // the ELF @got relocs except for TLS, instead using the | |
9182 | // PowerOpen variant of a compiler managed GOT (called TOC). | |
9183 | // The PowerOpen TOC sequence equivalent to the first | |
9184 | // example is optimized. | |
aba6bc71 AM |
9185 | case elfcpp::R_POWERPC_GOT_TLSLD16_HA: |
9186 | case elfcpp::R_POWERPC_GOT_TLSGD16_HA: | |
9187 | case elfcpp::R_POWERPC_GOT_TPREL16_HA: | |
9188 | case elfcpp::R_POWERPC_GOT_DTPREL16_HA: | |
9189 | case elfcpp::R_POWERPC_GOT16_HA: | |
9190 | case elfcpp::R_PPC64_TOC16_HA: | |
d8f5a274 | 9191 | if (parameters->options().toc_optimize()) |
aba6bc71 | 9192 | { |
dcfc7dd4 | 9193 | Insn* iview = reinterpret_cast<Insn*>(view - d_offset); |
aba6bc71 | 9194 | Insn insn = elfcpp::Swap<32, big_endian>::readval(iview); |
5edad15d AM |
9195 | if (r_type == elfcpp::R_PPC64_TOC16_HA |
9196 | && object->make_toc_relative(target, &value)) | |
9197 | { | |
9198 | gold_assert((insn & ((0x3f << 26) | 0x1f << 16)) | |
9199 | == ((15u << 26) | (2 << 16))); | |
9200 | } | |
9201 | if (((insn & ((0x3f << 26) | 0x1f << 16)) | |
9202 | == ((15u << 26) | (2 << 16)) /* addis rt,2,imm */) | |
9203 | && value + 0x8000 < 0x10000) | |
aba6bc71 AM |
9204 | { |
9205 | elfcpp::Swap<32, big_endian>::writeval(iview, nop); | |
9206 | return true; | |
9207 | } | |
9208 | } | |
9209 | break; | |
9210 | ||
9211 | case elfcpp::R_POWERPC_GOT_TLSLD16_LO: | |
9212 | case elfcpp::R_POWERPC_GOT_TLSGD16_LO: | |
9213 | case elfcpp::R_POWERPC_GOT_TPREL16_LO: | |
9214 | case elfcpp::R_POWERPC_GOT_DTPREL16_LO: | |
9215 | case elfcpp::R_POWERPC_GOT16_LO: | |
9216 | case elfcpp::R_PPC64_GOT16_LO_DS: | |
9217 | case elfcpp::R_PPC64_TOC16_LO: | |
9218 | case elfcpp::R_PPC64_TOC16_LO_DS: | |
d8f5a274 | 9219 | if (parameters->options().toc_optimize()) |
aba6bc71 | 9220 | { |
dcfc7dd4 | 9221 | Insn* iview = reinterpret_cast<Insn*>(view - d_offset); |
aba6bc71 | 9222 | Insn insn = elfcpp::Swap<32, big_endian>::readval(iview); |
5edad15d AM |
9223 | bool changed = false; |
9224 | if (r_type == elfcpp::R_PPC64_TOC16_LO_DS | |
9225 | && object->make_toc_relative(target, &value)) | |
9226 | { | |
9227 | gold_assert ((insn & (0x3f << 26)) == 58u << 26 /* ld */); | |
9228 | insn ^= (14u << 26) ^ (58u << 26); | |
9229 | r_type = elfcpp::R_PPC64_TOC16_LO; | |
9230 | changed = true; | |
9231 | } | |
9232 | if (ok_lo_toc_insn(insn, r_type) | |
9233 | && value + 0x8000 < 0x10000) | |
aba6bc71 AM |
9234 | { |
9235 | if ((insn & (0x3f << 26)) == 12u << 26 /* addic */) | |
9236 | { | |
9237 | // Transform addic to addi when we change reg. | |
9238 | insn &= ~((0x3f << 26) | (0x1f << 16)); | |
9239 | insn |= (14u << 26) | (2 << 16); | |
9240 | } | |
9241 | else | |
9242 | { | |
9243 | insn &= ~(0x1f << 16); | |
9244 | insn |= 2 << 16; | |
9245 | } | |
5edad15d | 9246 | changed = true; |
aba6bc71 | 9247 | } |
5edad15d AM |
9248 | if (changed) |
9249 | elfcpp::Swap<32, big_endian>::writeval(iview, insn); | |
aba6bc71 AM |
9250 | } |
9251 | break; | |
549dba71 | 9252 | |
9a23f96e AM |
9253 | case elfcpp::R_POWERPC_TPREL16_HA: |
9254 | if (parameters->options().tls_optimize() && value + 0x8000 < 0x10000) | |
9255 | { | |
9256 | Insn* iview = reinterpret_cast<Insn*>(view - d_offset); | |
9257 | Insn insn = elfcpp::Swap<32, big_endian>::readval(iview); | |
9258 | if ((insn & ((0x3f << 26) | 0x1f << 16)) | |
9259 | != ((15u << 26) | ((size == 32 ? 2 : 13) << 16))) | |
9260 | ; | |
9261 | else | |
9262 | { | |
9263 | elfcpp::Swap<32, big_endian>::writeval(iview, nop); | |
9264 | return true; | |
9265 | } | |
9266 | } | |
9267 | break; | |
9268 | ||
9269 | case elfcpp::R_PPC64_TPREL16_LO_DS: | |
9270 | if (size == 32) | |
9271 | // R_PPC_TLSGD, R_PPC_TLSLD | |
9272 | break; | |
9273 | // Fall through. | |
9274 | case elfcpp::R_POWERPC_TPREL16_LO: | |
9275 | if (parameters->options().tls_optimize() && value + 0x8000 < 0x10000) | |
9276 | { | |
9277 | Insn* iview = reinterpret_cast<Insn*>(view - d_offset); | |
9278 | Insn insn = elfcpp::Swap<32, big_endian>::readval(iview); | |
9279 | insn &= ~(0x1f << 16); | |
9280 | insn |= (size == 32 ? 2 : 13) << 16; | |
9281 | elfcpp::Swap<32, big_endian>::writeval(iview, insn); | |
9282 | } | |
9283 | break; | |
9284 | ||
549dba71 AM |
9285 | case elfcpp::R_PPC64_ENTRY: |
9286 | value = (target->got_section()->output_section()->address() | |
9287 | + object->toc_base_offset()); | |
9288 | if (value + 0x80008000 <= 0xffffffff | |
9289 | && !parameters->options().output_is_position_independent()) | |
9290 | { | |
9291 | Insn* iview = reinterpret_cast<Insn*>(view); | |
9292 | Insn insn1 = elfcpp::Swap<32, big_endian>::readval(iview); | |
9293 | Insn insn2 = elfcpp::Swap<32, big_endian>::readval(iview + 1); | |
9294 | ||
9295 | if ((insn1 & ~0xfffc) == ld_2_12 | |
9296 | && insn2 == add_2_2_12) | |
9297 | { | |
9298 | insn1 = lis_2 + ha(value); | |
9299 | elfcpp::Swap<32, big_endian>::writeval(iview, insn1); | |
9300 | insn2 = addi_2_2 + l(value); | |
9301 | elfcpp::Swap<32, big_endian>::writeval(iview + 1, insn2); | |
9302 | return true; | |
9303 | } | |
9304 | } | |
9305 | else | |
9306 | { | |
9307 | value -= address; | |
9308 | if (value + 0x80008000 <= 0xffffffff) | |
9309 | { | |
9310 | Insn* iview = reinterpret_cast<Insn*>(view); | |
9311 | Insn insn1 = elfcpp::Swap<32, big_endian>::readval(iview); | |
9312 | Insn insn2 = elfcpp::Swap<32, big_endian>::readval(iview + 1); | |
9313 | ||
9314 | if ((insn1 & ~0xfffc) == ld_2_12 | |
9315 | && insn2 == add_2_2_12) | |
9316 | { | |
9317 | insn1 = addis_2_12 + ha(value); | |
9318 | elfcpp::Swap<32, big_endian>::writeval(iview, insn1); | |
9319 | insn2 = addi_2_2 + l(value); | |
9320 | elfcpp::Swap<32, big_endian>::writeval(iview + 1, insn2); | |
9321 | return true; | |
9322 | } | |
9323 | } | |
9324 | } | |
9325 | break; | |
e3a7574e AM |
9326 | |
9327 | case elfcpp::R_POWERPC_REL16_LO: | |
9328 | // If we are generating a non-PIC executable, edit | |
9329 | // 0: addis 2,12,.TOC.-0b@ha | |
9330 | // addi 2,2,.TOC.-0b@l | |
9331 | // used by ELFv2 global entry points to set up r2, to | |
9332 | // lis 2,.TOC.@ha | |
9333 | // addi 2,2,.TOC.@l | |
9334 | // if .TOC. is in range. */ | |
9335 | if (value + address - 4 + 0x80008000 <= 0xffffffff | |
9336 | && relnum != 0 | |
9337 | && preloc != NULL | |
9338 | && target->abiversion() >= 2 | |
9339 | && !parameters->options().output_is_position_independent() | |
4f038ee5 | 9340 | && rela.get_r_addend() == d_offset + 4 |
e3a7574e AM |
9341 | && gsym != NULL |
9342 | && strcmp(gsym->name(), ".TOC.") == 0) | |
9343 | { | |
0e123f69 | 9344 | const int reloc_size = elfcpp::Elf_sizes<size>::rela_size; |
e3a7574e AM |
9345 | Reltype prev_rela(preloc - reloc_size); |
9346 | if ((prev_rela.get_r_info() | |
9347 | == elfcpp::elf_r_info<size>(r_sym, | |
9348 | elfcpp::R_POWERPC_REL16_HA)) | |
9349 | && prev_rela.get_r_offset() + 4 == rela.get_r_offset() | |
9350 | && prev_rela.get_r_addend() + 4 == rela.get_r_addend()) | |
9351 | { | |
dcfc7dd4 | 9352 | Insn* iview = reinterpret_cast<Insn*>(view - d_offset); |
e3a7574e AM |
9353 | Insn insn1 = elfcpp::Swap<32, big_endian>::readval(iview - 1); |
9354 | Insn insn2 = elfcpp::Swap<32, big_endian>::readval(iview); | |
9355 | ||
9356 | if ((insn1 & 0xffff0000) == addis_2_12 | |
9357 | && (insn2 & 0xffff0000) == addi_2_2) | |
9358 | { | |
9359 | insn1 = lis_2 + ha(value + address - 4); | |
9360 | elfcpp::Swap<32, big_endian>::writeval(iview - 1, insn1); | |
9361 | insn2 = addi_2_2 + l(value + address - 4); | |
9362 | elfcpp::Swap<32, big_endian>::writeval(iview, insn2); | |
9363 | if (relinfo->rr) | |
9364 | { | |
9365 | relinfo->rr->set_strategy(relnum - 1, | |
9366 | Relocatable_relocs::RELOC_SPECIAL); | |
9367 | relinfo->rr->set_strategy(relnum, | |
9368 | Relocatable_relocs::RELOC_SPECIAL); | |
9369 | } | |
9370 | return true; | |
9371 | } | |
9372 | } | |
9373 | } | |
9374 | break; | |
aba6bc71 AM |
9375 | } |
9376 | } | |
9377 | ||
f4baf0d4 | 9378 | typename Reloc::Overflow_check overflow = Reloc::CHECK_NONE; |
b80eed39 | 9379 | elfcpp::Shdr<size, big_endian> shdr(relinfo->data_shdr); |
dd93cd0a AM |
9380 | switch (r_type) |
9381 | { | |
9382 | case elfcpp::R_POWERPC_ADDR32: | |
9383 | case elfcpp::R_POWERPC_UADDR32: | |
9384 | if (size == 64) | |
f4baf0d4 | 9385 | overflow = Reloc::CHECK_BITFIELD; |
42cacb20 DE |
9386 | break; |
9387 | ||
9388 | case elfcpp::R_POWERPC_REL32: | |
a680de9a | 9389 | case elfcpp::R_POWERPC_REL16DX_HA: |
dd93cd0a | 9390 | if (size == 64) |
f4baf0d4 | 9391 | overflow = Reloc::CHECK_SIGNED; |
dd93cd0a AM |
9392 | break; |
9393 | ||
dd93cd0a | 9394 | case elfcpp::R_POWERPC_UADDR16: |
f4baf0d4 | 9395 | overflow = Reloc::CHECK_BITFIELD; |
42cacb20 DE |
9396 | break; |
9397 | ||
b80eed39 AM |
9398 | case elfcpp::R_POWERPC_ADDR16: |
9399 | // We really should have three separate relocations, | |
9400 | // one for 16-bit data, one for insns with 16-bit signed fields, | |
9401 | // and one for insns with 16-bit unsigned fields. | |
9402 | overflow = Reloc::CHECK_BITFIELD; | |
9403 | if ((shdr.get_sh_flags() & elfcpp::SHF_EXECINSTR) != 0) | |
9404 | overflow = Reloc::CHECK_LOW_INSN; | |
9405 | break; | |
9406 | ||
f9c6b907 AM |
9407 | case elfcpp::R_POWERPC_ADDR16_HI: |
9408 | case elfcpp::R_POWERPC_ADDR16_HA: | |
9409 | case elfcpp::R_POWERPC_GOT16_HI: | |
9410 | case elfcpp::R_POWERPC_GOT16_HA: | |
9411 | case elfcpp::R_POWERPC_PLT16_HI: | |
9412 | case elfcpp::R_POWERPC_PLT16_HA: | |
9413 | case elfcpp::R_POWERPC_SECTOFF_HI: | |
9414 | case elfcpp::R_POWERPC_SECTOFF_HA: | |
9415 | case elfcpp::R_PPC64_TOC16_HI: | |
9416 | case elfcpp::R_PPC64_TOC16_HA: | |
9417 | case elfcpp::R_PPC64_PLTGOT16_HI: | |
9418 | case elfcpp::R_PPC64_PLTGOT16_HA: | |
9419 | case elfcpp::R_POWERPC_TPREL16_HI: | |
9420 | case elfcpp::R_POWERPC_TPREL16_HA: | |
9421 | case elfcpp::R_POWERPC_DTPREL16_HI: | |
9422 | case elfcpp::R_POWERPC_DTPREL16_HA: | |
9423 | case elfcpp::R_POWERPC_GOT_TLSGD16_HI: | |
9424 | case elfcpp::R_POWERPC_GOT_TLSGD16_HA: | |
9425 | case elfcpp::R_POWERPC_GOT_TLSLD16_HI: | |
9426 | case elfcpp::R_POWERPC_GOT_TLSLD16_HA: | |
9427 | case elfcpp::R_POWERPC_GOT_TPREL16_HI: | |
9428 | case elfcpp::R_POWERPC_GOT_TPREL16_HA: | |
9429 | case elfcpp::R_POWERPC_GOT_DTPREL16_HI: | |
9430 | case elfcpp::R_POWERPC_GOT_DTPREL16_HA: | |
9431 | case elfcpp::R_POWERPC_REL16_HI: | |
9432 | case elfcpp::R_POWERPC_REL16_HA: | |
b80eed39 AM |
9433 | if (size != 32) |
9434 | overflow = Reloc::CHECK_HIGH_INSN; | |
9435 | break; | |
9436 | ||
dd93cd0a AM |
9437 | case elfcpp::R_POWERPC_REL16: |
9438 | case elfcpp::R_PPC64_TOC16: | |
9439 | case elfcpp::R_POWERPC_GOT16: | |
9440 | case elfcpp::R_POWERPC_SECTOFF: | |
9441 | case elfcpp::R_POWERPC_TPREL16: | |
9442 | case elfcpp::R_POWERPC_DTPREL16: | |
b80eed39 AM |
9443 | case elfcpp::R_POWERPC_GOT_TLSGD16: |
9444 | case elfcpp::R_POWERPC_GOT_TLSLD16: | |
9445 | case elfcpp::R_POWERPC_GOT_TPREL16: | |
9446 | case elfcpp::R_POWERPC_GOT_DTPREL16: | |
9447 | overflow = Reloc::CHECK_LOW_INSN; | |
9448 | break; | |
9449 | ||
9450 | case elfcpp::R_POWERPC_ADDR24: | |
9451 | case elfcpp::R_POWERPC_ADDR14: | |
9452 | case elfcpp::R_POWERPC_ADDR14_BRTAKEN: | |
9453 | case elfcpp::R_POWERPC_ADDR14_BRNTAKEN: | |
9454 | case elfcpp::R_PPC64_ADDR16_DS: | |
9455 | case elfcpp::R_POWERPC_REL24: | |
9456 | case elfcpp::R_PPC_PLTREL24: | |
9457 | case elfcpp::R_PPC_LOCAL24PC: | |
dd93cd0a AM |
9458 | case elfcpp::R_PPC64_TPREL16_DS: |
9459 | case elfcpp::R_PPC64_DTPREL16_DS: | |
9460 | case elfcpp::R_PPC64_TOC16_DS: | |
9461 | case elfcpp::R_PPC64_GOT16_DS: | |
9462 | case elfcpp::R_PPC64_SECTOFF_DS: | |
9463 | case elfcpp::R_POWERPC_REL14: | |
9464 | case elfcpp::R_POWERPC_REL14_BRTAKEN: | |
9465 | case elfcpp::R_POWERPC_REL14_BRNTAKEN: | |
f4baf0d4 | 9466 | overflow = Reloc::CHECK_SIGNED; |
42cacb20 | 9467 | break; |
dd93cd0a | 9468 | } |
42cacb20 | 9469 | |
dcfc7dd4 | 9470 | Insn* iview = reinterpret_cast<Insn*>(view - d_offset); |
a680de9a PB |
9471 | Insn insn = 0; |
9472 | ||
b80eed39 AM |
9473 | if (overflow == Reloc::CHECK_LOW_INSN |
9474 | || overflow == Reloc::CHECK_HIGH_INSN) | |
9475 | { | |
a680de9a | 9476 | insn = elfcpp::Swap<32, big_endian>::readval(iview); |
b80eed39 | 9477 | |
a47622ac AM |
9478 | if ((insn & (0x3f << 26)) == 10u << 26 /* cmpli */) |
9479 | overflow = Reloc::CHECK_BITFIELD; | |
9480 | else if (overflow == Reloc::CHECK_LOW_INSN | |
9481 | ? ((insn & (0x3f << 26)) == 28u << 26 /* andi */ | |
9482 | || (insn & (0x3f << 26)) == 24u << 26 /* ori */ | |
9483 | || (insn & (0x3f << 26)) == 26u << 26 /* xori */) | |
9484 | : ((insn & (0x3f << 26)) == 29u << 26 /* andis */ | |
9485 | || (insn & (0x3f << 26)) == 25u << 26 /* oris */ | |
9486 | || (insn & (0x3f << 26)) == 27u << 26 /* xoris */)) | |
b80eed39 | 9487 | overflow = Reloc::CHECK_UNSIGNED; |
e30880c2 CC |
9488 | else |
9489 | overflow = Reloc::CHECK_SIGNED; | |
b80eed39 AM |
9490 | } |
9491 | ||
a680de9a | 9492 | bool maybe_dq_reloc = false; |
3ea0a085 | 9493 | typename Powerpc_relocate_functions<size, big_endian>::Status status |
f4baf0d4 | 9494 | = Powerpc_relocate_functions<size, big_endian>::STATUS_OK; |
dd93cd0a AM |
9495 | switch (r_type) |
9496 | { | |
9497 | case elfcpp::R_POWERPC_NONE: | |
9498 | case elfcpp::R_POWERPC_TLS: | |
9499 | case elfcpp::R_POWERPC_GNU_VTINHERIT: | |
9500 | case elfcpp::R_POWERPC_GNU_VTENTRY: | |
42cacb20 DE |
9501 | break; |
9502 | ||
9503 | case elfcpp::R_PPC64_ADDR64: | |
dd93cd0a | 9504 | case elfcpp::R_PPC64_REL64: |
cf43a2fe | 9505 | case elfcpp::R_PPC64_TOC: |
45965137 | 9506 | case elfcpp::R_PPC64_ADDR64_LOCAL: |
dd93cd0a AM |
9507 | Reloc::addr64(view, value); |
9508 | break; | |
9509 | ||
9510 | case elfcpp::R_POWERPC_TPREL: | |
9511 | case elfcpp::R_POWERPC_DTPREL: | |
9512 | if (size == 64) | |
9513 | Reloc::addr64(view, value); | |
9514 | else | |
3ea0a085 | 9515 | status = Reloc::addr32(view, value, overflow); |
dd93cd0a AM |
9516 | break; |
9517 | ||
9518 | case elfcpp::R_PPC64_UADDR64: | |
9519 | Reloc::addr64_u(view, value); | |
42cacb20 DE |
9520 | break; |
9521 | ||
9522 | case elfcpp::R_POWERPC_ADDR32: | |
3ea0a085 | 9523 | status = Reloc::addr32(view, value, overflow); |
dd93cd0a AM |
9524 | break; |
9525 | ||
acc276d8 | 9526 | case elfcpp::R_POWERPC_REL32: |
dd93cd0a | 9527 | case elfcpp::R_POWERPC_UADDR32: |
3ea0a085 | 9528 | status = Reloc::addr32_u(view, value, overflow); |
dd93cd0a AM |
9529 | break; |
9530 | ||
9531 | case elfcpp::R_POWERPC_ADDR24: | |
9532 | case elfcpp::R_POWERPC_REL24: | |
9533 | case elfcpp::R_PPC_PLTREL24: | |
9534 | case elfcpp::R_PPC_LOCAL24PC: | |
3ea0a085 | 9535 | status = Reloc::addr24(view, value, overflow); |
42cacb20 DE |
9536 | break; |
9537 | ||
dd93cd0a AM |
9538 | case elfcpp::R_POWERPC_GOT_DTPREL16: |
9539 | case elfcpp::R_POWERPC_GOT_DTPREL16_LO: | |
ec86f434 AM |
9540 | case elfcpp::R_POWERPC_GOT_TPREL16: |
9541 | case elfcpp::R_POWERPC_GOT_TPREL16_LO: | |
dd93cd0a AM |
9542 | if (size == 64) |
9543 | { | |
ec86f434 | 9544 | // On ppc64 these are all ds form |
a680de9a | 9545 | maybe_dq_reloc = true; |
dd93cd0a AM |
9546 | break; |
9547 | } | |
c25aa1e1 | 9548 | // Fall through. |
cf43a2fe | 9549 | case elfcpp::R_POWERPC_ADDR16: |
dd93cd0a | 9550 | case elfcpp::R_POWERPC_REL16: |
cf43a2fe | 9551 | case elfcpp::R_PPC64_TOC16: |
42cacb20 | 9552 | case elfcpp::R_POWERPC_GOT16: |
cf43a2fe | 9553 | case elfcpp::R_POWERPC_SECTOFF: |
dd93cd0a AM |
9554 | case elfcpp::R_POWERPC_TPREL16: |
9555 | case elfcpp::R_POWERPC_DTPREL16: | |
9556 | case elfcpp::R_POWERPC_GOT_TLSGD16: | |
9557 | case elfcpp::R_POWERPC_GOT_TLSLD16: | |
cf43a2fe | 9558 | case elfcpp::R_POWERPC_ADDR16_LO: |
dd93cd0a | 9559 | case elfcpp::R_POWERPC_REL16_LO: |
cf43a2fe | 9560 | case elfcpp::R_PPC64_TOC16_LO: |
42cacb20 | 9561 | case elfcpp::R_POWERPC_GOT16_LO: |
08be3224 | 9562 | case elfcpp::R_POWERPC_PLT16_LO: |
cf43a2fe | 9563 | case elfcpp::R_POWERPC_SECTOFF_LO: |
dd93cd0a AM |
9564 | case elfcpp::R_POWERPC_TPREL16_LO: |
9565 | case elfcpp::R_POWERPC_DTPREL16_LO: | |
9566 | case elfcpp::R_POWERPC_GOT_TLSGD16_LO: | |
9567 | case elfcpp::R_POWERPC_GOT_TLSLD16_LO: | |
a680de9a PB |
9568 | if (size == 64) |
9569 | status = Reloc::addr16(view, value, overflow); | |
9570 | else | |
9571 | maybe_dq_reloc = true; | |
dd93cd0a AM |
9572 | break; |
9573 | ||
9574 | case elfcpp::R_POWERPC_UADDR16: | |
3ea0a085 | 9575 | status = Reloc::addr16_u(view, value, overflow); |
42cacb20 DE |
9576 | break; |
9577 | ||
f9c6b907 AM |
9578 | case elfcpp::R_PPC64_ADDR16_HIGH: |
9579 | case elfcpp::R_PPC64_TPREL16_HIGH: | |
9580 | case elfcpp::R_PPC64_DTPREL16_HIGH: | |
9581 | if (size == 32) | |
9582 | // R_PPC_EMB_MRKREF, R_PPC_EMB_RELST_LO, R_PPC_EMB_RELST_HA | |
9583 | goto unsupp; | |
d8e90251 | 9584 | // Fall through. |
cf43a2fe | 9585 | case elfcpp::R_POWERPC_ADDR16_HI: |
dd93cd0a | 9586 | case elfcpp::R_POWERPC_REL16_HI: |
cf43a2fe | 9587 | case elfcpp::R_PPC64_TOC16_HI: |
42cacb20 | 9588 | case elfcpp::R_POWERPC_GOT16_HI: |
08be3224 | 9589 | case elfcpp::R_POWERPC_PLT16_HI: |
cf43a2fe | 9590 | case elfcpp::R_POWERPC_SECTOFF_HI: |
dd93cd0a AM |
9591 | case elfcpp::R_POWERPC_TPREL16_HI: |
9592 | case elfcpp::R_POWERPC_DTPREL16_HI: | |
9593 | case elfcpp::R_POWERPC_GOT_TLSGD16_HI: | |
9594 | case elfcpp::R_POWERPC_GOT_TLSLD16_HI: | |
9595 | case elfcpp::R_POWERPC_GOT_TPREL16_HI: | |
9596 | case elfcpp::R_POWERPC_GOT_DTPREL16_HI: | |
9597 | Reloc::addr16_hi(view, value); | |
42cacb20 DE |
9598 | break; |
9599 | ||
f9c6b907 AM |
9600 | case elfcpp::R_PPC64_ADDR16_HIGHA: |
9601 | case elfcpp::R_PPC64_TPREL16_HIGHA: | |
9602 | case elfcpp::R_PPC64_DTPREL16_HIGHA: | |
9603 | if (size == 32) | |
9604 | // R_PPC_EMB_RELSEC16, R_PPC_EMB_RELST_HI, R_PPC_EMB_BIT_FLD | |
9605 | goto unsupp; | |
d8e90251 | 9606 | // Fall through. |
cf43a2fe | 9607 | case elfcpp::R_POWERPC_ADDR16_HA: |
dd93cd0a | 9608 | case elfcpp::R_POWERPC_REL16_HA: |
cf43a2fe | 9609 | case elfcpp::R_PPC64_TOC16_HA: |
42cacb20 | 9610 | case elfcpp::R_POWERPC_GOT16_HA: |
08be3224 | 9611 | case elfcpp::R_POWERPC_PLT16_HA: |
cf43a2fe | 9612 | case elfcpp::R_POWERPC_SECTOFF_HA: |
dd93cd0a AM |
9613 | case elfcpp::R_POWERPC_TPREL16_HA: |
9614 | case elfcpp::R_POWERPC_DTPREL16_HA: | |
9615 | case elfcpp::R_POWERPC_GOT_TLSGD16_HA: | |
9616 | case elfcpp::R_POWERPC_GOT_TLSLD16_HA: | |
9617 | case elfcpp::R_POWERPC_GOT_TPREL16_HA: | |
9618 | case elfcpp::R_POWERPC_GOT_DTPREL16_HA: | |
9619 | Reloc::addr16_ha(view, value); | |
42cacb20 DE |
9620 | break; |
9621 | ||
a680de9a PB |
9622 | case elfcpp::R_POWERPC_REL16DX_HA: |
9623 | status = Reloc::addr16dx_ha(view, value, overflow); | |
9624 | break; | |
9625 | ||
dd93cd0a AM |
9626 | case elfcpp::R_PPC64_DTPREL16_HIGHER: |
9627 | if (size == 32) | |
9628 | // R_PPC_EMB_NADDR16_LO | |
9629 | goto unsupp; | |
d8e90251 | 9630 | // Fall through. |
dd93cd0a AM |
9631 | case elfcpp::R_PPC64_ADDR16_HIGHER: |
9632 | case elfcpp::R_PPC64_TPREL16_HIGHER: | |
9633 | Reloc::addr16_hi2(view, value); | |
42cacb20 DE |
9634 | break; |
9635 | ||
dd93cd0a AM |
9636 | case elfcpp::R_PPC64_DTPREL16_HIGHERA: |
9637 | if (size == 32) | |
9638 | // R_PPC_EMB_NADDR16_HI | |
9639 | goto unsupp; | |
d8e90251 | 9640 | // Fall through. |
dd93cd0a AM |
9641 | case elfcpp::R_PPC64_ADDR16_HIGHERA: |
9642 | case elfcpp::R_PPC64_TPREL16_HIGHERA: | |
9643 | Reloc::addr16_ha2(view, value); | |
42cacb20 DE |
9644 | break; |
9645 | ||
dd93cd0a AM |
9646 | case elfcpp::R_PPC64_DTPREL16_HIGHEST: |
9647 | if (size == 32) | |
9648 | // R_PPC_EMB_NADDR16_HA | |
9649 | goto unsupp; | |
d8e90251 | 9650 | // Fall through. |
dd93cd0a AM |
9651 | case elfcpp::R_PPC64_ADDR16_HIGHEST: |
9652 | case elfcpp::R_PPC64_TPREL16_HIGHEST: | |
9653 | Reloc::addr16_hi3(view, value); | |
42cacb20 DE |
9654 | break; |
9655 | ||
dd93cd0a AM |
9656 | case elfcpp::R_PPC64_DTPREL16_HIGHESTA: |
9657 | if (size == 32) | |
9658 | // R_PPC_EMB_SDAI16 | |
9659 | goto unsupp; | |
d8e90251 | 9660 | // Fall through. |
dd93cd0a AM |
9661 | case elfcpp::R_PPC64_ADDR16_HIGHESTA: |
9662 | case elfcpp::R_PPC64_TPREL16_HIGHESTA: | |
9663 | Reloc::addr16_ha3(view, value); | |
9664 | break; | |
9665 | ||
9666 | case elfcpp::R_PPC64_DTPREL16_DS: | |
9667 | case elfcpp::R_PPC64_DTPREL16_LO_DS: | |
9668 | if (size == 32) | |
9669 | // R_PPC_EMB_NADDR32, R_PPC_EMB_NADDR16 | |
9670 | goto unsupp; | |
d8e90251 | 9671 | // Fall through. |
dd93cd0a AM |
9672 | case elfcpp::R_PPC64_TPREL16_DS: |
9673 | case elfcpp::R_PPC64_TPREL16_LO_DS: | |
9674 | if (size == 32) | |
9675 | // R_PPC_TLSGD, R_PPC_TLSLD | |
9676 | break; | |
d8e90251 | 9677 | // Fall through. |
cf43a2fe AM |
9678 | case elfcpp::R_PPC64_ADDR16_DS: |
9679 | case elfcpp::R_PPC64_ADDR16_LO_DS: | |
42cacb20 DE |
9680 | case elfcpp::R_PPC64_TOC16_DS: |
9681 | case elfcpp::R_PPC64_TOC16_LO_DS: | |
cf43a2fe AM |
9682 | case elfcpp::R_PPC64_GOT16_DS: |
9683 | case elfcpp::R_PPC64_GOT16_LO_DS: | |
08be3224 | 9684 | case elfcpp::R_PPC64_PLT16_LO_DS: |
cf43a2fe AM |
9685 | case elfcpp::R_PPC64_SECTOFF_DS: |
9686 | case elfcpp::R_PPC64_SECTOFF_LO_DS: | |
a680de9a | 9687 | maybe_dq_reloc = true; |
dd93cd0a AM |
9688 | break; |
9689 | ||
9690 | case elfcpp::R_POWERPC_ADDR14: | |
9691 | case elfcpp::R_POWERPC_ADDR14_BRTAKEN: | |
9692 | case elfcpp::R_POWERPC_ADDR14_BRNTAKEN: | |
9693 | case elfcpp::R_POWERPC_REL14: | |
9694 | case elfcpp::R_POWERPC_REL14_BRTAKEN: | |
9695 | case elfcpp::R_POWERPC_REL14_BRNTAKEN: | |
3ea0a085 | 9696 | status = Reloc::addr14(view, value, overflow); |
42cacb20 DE |
9697 | break; |
9698 | ||
9699 | case elfcpp::R_POWERPC_COPY: | |
9700 | case elfcpp::R_POWERPC_GLOB_DAT: | |
9701 | case elfcpp::R_POWERPC_JMP_SLOT: | |
9702 | case elfcpp::R_POWERPC_RELATIVE: | |
42cacb20 | 9703 | case elfcpp::R_POWERPC_DTPMOD: |
dd93cd0a AM |
9704 | case elfcpp::R_PPC64_JMP_IREL: |
9705 | case elfcpp::R_POWERPC_IRELATIVE: | |
42cacb20 DE |
9706 | gold_error_at_location(relinfo, relnum, rela.get_r_offset(), |
9707 | _("unexpected reloc %u in object file"), | |
9708 | r_type); | |
9709 | break; | |
9710 | ||
7e57d19e | 9711 | case elfcpp::R_PPC64_TOCSAVE: |
dd93cd0a | 9712 | if (size == 32) |
7e57d19e | 9713 | // R_PPC_EMB_SDA21 |
dd93cd0a AM |
9714 | goto unsupp; |
9715 | else | |
9716 | { | |
7e57d19e AM |
9717 | Symbol_location loc; |
9718 | loc.object = relinfo->object; | |
9719 | loc.shndx = relinfo->data_shndx; | |
9720 | loc.offset = rela.get_r_offset(); | |
9721 | Tocsave_loc::const_iterator p = target->tocsave_loc().find(loc); | |
9722 | if (p != target->tocsave_loc().end()) | |
9723 | { | |
9724 | // If we've generated plt calls using this tocsave, then | |
9725 | // the nop needs to be changed to save r2. | |
9726 | Insn* iview = reinterpret_cast<Insn*>(view); | |
9727 | if (elfcpp::Swap<32, big_endian>::readval(iview) == nop) | |
9728 | elfcpp::Swap<32, big_endian>:: | |
9729 | writeval(iview, std_2_1 + target->stk_toc()); | |
9730 | } | |
dd93cd0a AM |
9731 | } |
9732 | break; | |
9733 | ||
9734 | case elfcpp::R_PPC_EMB_SDA2I16: | |
9735 | case elfcpp::R_PPC_EMB_SDA2REL: | |
9736 | if (size == 32) | |
9737 | goto unsupp; | |
9738 | // R_PPC64_TLSGD, R_PPC64_TLSLD | |
6ce78956 AM |
9739 | break; |
9740 | ||
dd93cd0a AM |
9741 | case elfcpp::R_POWERPC_PLT32: |
9742 | case elfcpp::R_POWERPC_PLTREL32: | |
dd93cd0a AM |
9743 | case elfcpp::R_PPC_SDAREL16: |
9744 | case elfcpp::R_POWERPC_ADDR30: | |
9745 | case elfcpp::R_PPC64_PLT64: | |
9746 | case elfcpp::R_PPC64_PLTREL64: | |
9747 | case elfcpp::R_PPC64_PLTGOT16: | |
9748 | case elfcpp::R_PPC64_PLTGOT16_LO: | |
9749 | case elfcpp::R_PPC64_PLTGOT16_HI: | |
9750 | case elfcpp::R_PPC64_PLTGOT16_HA: | |
dd93cd0a AM |
9751 | case elfcpp::R_PPC64_PLTGOT16_DS: |
9752 | case elfcpp::R_PPC64_PLTGOT16_LO_DS: | |
dd93cd0a AM |
9753 | case elfcpp::R_PPC_EMB_RELSDA: |
9754 | case elfcpp::R_PPC_TOC16: | |
42cacb20 | 9755 | default: |
dd93cd0a | 9756 | unsupp: |
42cacb20 DE |
9757 | gold_error_at_location(relinfo, relnum, rela.get_r_offset(), |
9758 | _("unsupported reloc %u"), | |
9759 | r_type); | |
9760 | break; | |
9761 | } | |
a680de9a PB |
9762 | |
9763 | if (maybe_dq_reloc) | |
9764 | { | |
9765 | if (insn == 0) | |
9766 | insn = elfcpp::Swap<32, big_endian>::readval(iview); | |
9767 | ||
9768 | if ((insn & (0x3f << 26)) == 56u << 26 /* lq */ | |
9769 | || ((insn & (0x3f << 26)) == (61u << 26) /* lxv, stxv */ | |
9770 | && (insn & 3) == 1)) | |
9771 | status = Reloc::addr16_dq(view, value, overflow); | |
9772 | else if (size == 64 | |
9773 | || (insn & (0x3f << 26)) == 58u << 26 /* ld,ldu,lwa */ | |
9774 | || (insn & (0x3f << 26)) == 62u << 26 /* std,stdu,stq */ | |
9775 | || (insn & (0x3f << 26)) == 57u << 26 /* lfdp */ | |
9776 | || (insn & (0x3f << 26)) == 61u << 26 /* stfdp */) | |
9777 | status = Reloc::addr16_ds(view, value, overflow); | |
9778 | else | |
9779 | status = Reloc::addr16(view, value, overflow); | |
9780 | } | |
9781 | ||
0cfb0717 | 9782 | if (status != Powerpc_relocate_functions<size, big_endian>::STATUS_OK |
3ffaac20 AM |
9783 | && (has_stub_value |
9784 | || !(gsym != NULL | |
282c9750 | 9785 | && gsym->is_undefined() |
3ffaac20 | 9786 | && is_branch_reloc(r_type)))) |
0cfb0717 AM |
9787 | { |
9788 | gold_error_at_location(relinfo, relnum, rela.get_r_offset(), | |
9789 | _("relocation overflow")); | |
9790 | if (has_stub_value) | |
9791 | gold_info(_("try relinking with a smaller --stub-group-size")); | |
9792 | } | |
42cacb20 DE |
9793 | |
9794 | return true; | |
9795 | } | |
9796 | ||
42cacb20 DE |
9797 | // Relocate section data. |
9798 | ||
9799 | template<int size, bool big_endian> | |
9800 | void | |
9801 | Target_powerpc<size, big_endian>::relocate_section( | |
d83ce4e3 AM |
9802 | const Relocate_info<size, big_endian>* relinfo, |
9803 | unsigned int sh_type, | |
9804 | const unsigned char* prelocs, | |
9805 | size_t reloc_count, | |
9806 | Output_section* output_section, | |
9807 | bool needs_special_offset_handling, | |
9808 | unsigned char* view, | |
c9269dff | 9809 | Address address, |
d83ce4e3 AM |
9810 | section_size_type view_size, |
9811 | const Reloc_symbol_changes* reloc_symbol_changes) | |
42cacb20 DE |
9812 | { |
9813 | typedef Target_powerpc<size, big_endian> Powerpc; | |
9814 | typedef typename Target_powerpc<size, big_endian>::Relocate Powerpc_relocate; | |
168a4726 AM |
9815 | typedef typename Target_powerpc<size, big_endian>::Relocate_comdat_behavior |
9816 | Powerpc_comdat_behavior; | |
4d625b70 CC |
9817 | typedef gold::Default_classify_reloc<elfcpp::SHT_RELA, size, big_endian> |
9818 | Classify_reloc; | |
42cacb20 DE |
9819 | |
9820 | gold_assert(sh_type == elfcpp::SHT_RELA); | |
9821 | ||
4d625b70 CC |
9822 | gold::relocate_section<size, big_endian, Powerpc, Powerpc_relocate, |
9823 | Powerpc_comdat_behavior, Classify_reloc>( | |
42cacb20 DE |
9824 | relinfo, |
9825 | this, | |
9826 | prelocs, | |
9827 | reloc_count, | |
9828 | output_section, | |
9829 | needs_special_offset_handling, | |
9830 | view, | |
9831 | address, | |
364c7fa5 ILT |
9832 | view_size, |
9833 | reloc_symbol_changes); | |
42cacb20 DE |
9834 | } |
9835 | ||
4d625b70 | 9836 | template<int size, bool big_endian> |
cf43a2fe | 9837 | class Powerpc_scan_relocatable_reloc |
42cacb20 | 9838 | { |
cf43a2fe | 9839 | public: |
0e123f69 AM |
9840 | typedef typename elfcpp::Rela<size, big_endian> Reltype; |
9841 | static const int reloc_size = elfcpp::Elf_sizes<size>::rela_size; | |
4d625b70 CC |
9842 | static const int sh_type = elfcpp::SHT_RELA; |
9843 | ||
9844 | // Return the symbol referred to by the relocation. | |
9845 | static inline unsigned int | |
9846 | get_r_sym(const Reltype* reloc) | |
9847 | { return elfcpp::elf_r_sym<size>(reloc->get_r_info()); } | |
9848 | ||
9849 | // Return the type of the relocation. | |
9850 | static inline unsigned int | |
9851 | get_r_type(const Reltype* reloc) | |
9852 | { return elfcpp::elf_r_type<size>(reloc->get_r_info()); } | |
9853 | ||
cf43a2fe AM |
9854 | // Return the strategy to use for a local symbol which is not a |
9855 | // section symbol, given the relocation type. | |
9856 | inline Relocatable_relocs::Reloc_strategy | |
9857 | local_non_section_strategy(unsigned int r_type, Relobj*, unsigned int r_sym) | |
9858 | { | |
9859 | if (r_type == 0 && r_sym == 0) | |
9860 | return Relocatable_relocs::RELOC_DISCARD; | |
9861 | return Relocatable_relocs::RELOC_COPY; | |
9862 | } | |
9863 | ||
9864 | // Return the strategy to use for a local symbol which is a section | |
9865 | // symbol, given the relocation type. | |
9866 | inline Relocatable_relocs::Reloc_strategy | |
9867 | local_section_strategy(unsigned int, Relobj*) | |
9868 | { | |
9869 | return Relocatable_relocs::RELOC_ADJUST_FOR_SECTION_RELA; | |
9870 | } | |
9871 | ||
9872 | // Return the strategy to use for a global symbol, given the | |
9873 | // relocation type, the object, and the symbol index. | |
9874 | inline Relocatable_relocs::Reloc_strategy | |
9875 | global_strategy(unsigned int r_type, Relobj*, unsigned int) | |
9876 | { | |
08be3224 AM |
9877 | if (size == 32 |
9878 | && (r_type == elfcpp::R_PPC_PLTREL24 | |
9879 | || r_type == elfcpp::R_POWERPC_PLT16_LO | |
9880 | || r_type == elfcpp::R_POWERPC_PLT16_HI | |
9881 | || r_type == elfcpp::R_POWERPC_PLT16_HA)) | |
cf43a2fe AM |
9882 | return Relocatable_relocs::RELOC_SPECIAL; |
9883 | return Relocatable_relocs::RELOC_COPY; | |
9884 | } | |
9885 | }; | |
42cacb20 DE |
9886 | |
9887 | // Scan the relocs during a relocatable link. | |
9888 | ||
9889 | template<int size, bool big_endian> | |
9890 | void | |
9891 | Target_powerpc<size, big_endian>::scan_relocatable_relocs( | |
d83ce4e3 AM |
9892 | Symbol_table* symtab, |
9893 | Layout* layout, | |
9894 | Sized_relobj_file<size, big_endian>* object, | |
9895 | unsigned int data_shndx, | |
9896 | unsigned int sh_type, | |
9897 | const unsigned char* prelocs, | |
9898 | size_t reloc_count, | |
9899 | Output_section* output_section, | |
9900 | bool needs_special_offset_handling, | |
9901 | size_t local_symbol_count, | |
9902 | const unsigned char* plocal_symbols, | |
9903 | Relocatable_relocs* rr) | |
42cacb20 | 9904 | { |
4d625b70 CC |
9905 | typedef Powerpc_scan_relocatable_reloc<size, big_endian> Scan_strategy; |
9906 | ||
42cacb20 DE |
9907 | gold_assert(sh_type == elfcpp::SHT_RELA); |
9908 | ||
4d625b70 | 9909 | gold::scan_relocatable_relocs<size, big_endian, Scan_strategy>( |
42cacb20 DE |
9910 | symtab, |
9911 | layout, | |
9912 | object, | |
9913 | data_shndx, | |
9914 | prelocs, | |
9915 | reloc_count, | |
9916 | output_section, | |
9917 | needs_special_offset_handling, | |
9918 | local_symbol_count, | |
9919 | plocal_symbols, | |
9920 | rr); | |
9921 | } | |
9922 | ||
4d625b70 CC |
9923 | // Scan the relocs for --emit-relocs. |
9924 | ||
9925 | template<int size, bool big_endian> | |
9926 | void | |
9927 | Target_powerpc<size, big_endian>::emit_relocs_scan( | |
9928 | Symbol_table* symtab, | |
9929 | Layout* layout, | |
9930 | Sized_relobj_file<size, big_endian>* object, | |
9931 | unsigned int data_shndx, | |
9932 | unsigned int sh_type, | |
9933 | const unsigned char* prelocs, | |
9934 | size_t reloc_count, | |
9935 | Output_section* output_section, | |
9936 | bool needs_special_offset_handling, | |
9937 | size_t local_symbol_count, | |
9938 | const unsigned char* plocal_syms, | |
9939 | Relocatable_relocs* rr) | |
9940 | { | |
9941 | typedef gold::Default_classify_reloc<elfcpp::SHT_RELA, size, big_endian> | |
9942 | Classify_reloc; | |
9943 | typedef gold::Default_emit_relocs_strategy<Classify_reloc> | |
9944 | Emit_relocs_strategy; | |
9945 | ||
9946 | gold_assert(sh_type == elfcpp::SHT_RELA); | |
9947 | ||
9948 | gold::scan_relocatable_relocs<size, big_endian, Emit_relocs_strategy>( | |
9949 | symtab, | |
9950 | layout, | |
9951 | object, | |
9952 | data_shndx, | |
9953 | prelocs, | |
9954 | reloc_count, | |
9955 | output_section, | |
9956 | needs_special_offset_handling, | |
9957 | local_symbol_count, | |
9958 | plocal_syms, | |
9959 | rr); | |
9960 | } | |
9961 | ||
7404fe1b | 9962 | // Emit relocations for a section. |
dd93cd0a AM |
9963 | // This is a modified version of the function by the same name in |
9964 | // target-reloc.h. Using relocate_special_relocatable for | |
9965 | // R_PPC_PLTREL24 would require duplication of the entire body of the | |
9966 | // loop, so we may as well duplicate the whole thing. | |
42cacb20 DE |
9967 | |
9968 | template<int size, bool big_endian> | |
9969 | void | |
7404fe1b | 9970 | Target_powerpc<size, big_endian>::relocate_relocs( |
42cacb20 DE |
9971 | const Relocate_info<size, big_endian>* relinfo, |
9972 | unsigned int sh_type, | |
9973 | const unsigned char* prelocs, | |
9974 | size_t reloc_count, | |
9975 | Output_section* output_section, | |
62fe925a | 9976 | typename elfcpp::Elf_types<size>::Elf_Off offset_in_output_section, |
cf43a2fe | 9977 | unsigned char*, |
dd93cd0a | 9978 | Address view_address, |
cf43a2fe | 9979 | section_size_type, |
42cacb20 DE |
9980 | unsigned char* reloc_view, |
9981 | section_size_type reloc_view_size) | |
9982 | { | |
9983 | gold_assert(sh_type == elfcpp::SHT_RELA); | |
9984 | ||
0e123f69 AM |
9985 | typedef typename elfcpp::Rela<size, big_endian> Reltype; |
9986 | typedef typename elfcpp::Rela_write<size, big_endian> Reltype_write; | |
9987 | const int reloc_size = elfcpp::Elf_sizes<size>::rela_size; | |
dcfc7dd4 AM |
9988 | // Offset from start of insn to d-field reloc. |
9989 | const int d_offset = big_endian ? 2 : 0; | |
cf43a2fe AM |
9990 | |
9991 | Powerpc_relobj<size, big_endian>* const object | |
9992 | = static_cast<Powerpc_relobj<size, big_endian>*>(relinfo->object); | |
9993 | const unsigned int local_count = object->local_symbol_count(); | |
9994 | unsigned int got2_shndx = object->got2_shndx(); | |
c9269dff | 9995 | Address got2_addend = 0; |
cf43a2fe | 9996 | if (got2_shndx != 0) |
c9269dff AM |
9997 | { |
9998 | got2_addend = object->get_output_section_offset(got2_shndx); | |
9999 | gold_assert(got2_addend != invalid_address); | |
10000 | } | |
cf43a2fe | 10001 | |
033bfb73 CC |
10002 | const bool relocatable = parameters->options().relocatable(); |
10003 | ||
cf43a2fe | 10004 | unsigned char* pwrite = reloc_view; |
7404fe1b | 10005 | bool zap_next = false; |
cf43a2fe AM |
10006 | for (size_t i = 0; i < reloc_count; ++i, prelocs += reloc_size) |
10007 | { | |
91a65d2f | 10008 | Relocatable_relocs::Reloc_strategy strategy = relinfo->rr->strategy(i); |
cf43a2fe AM |
10009 | if (strategy == Relocatable_relocs::RELOC_DISCARD) |
10010 | continue; | |
10011 | ||
10012 | Reltype reloc(prelocs); | |
10013 | Reltype_write reloc_write(pwrite); | |
10014 | ||
7404fe1b | 10015 | Address offset = reloc.get_r_offset(); |
cf43a2fe | 10016 | typename elfcpp::Elf_types<size>::Elf_WXword r_info = reloc.get_r_info(); |
7404fe1b AM |
10017 | unsigned int r_sym = elfcpp::elf_r_sym<size>(r_info); |
10018 | unsigned int r_type = elfcpp::elf_r_type<size>(r_info); | |
10019 | const unsigned int orig_r_sym = r_sym; | |
10020 | typename elfcpp::Elf_types<size>::Elf_Swxword addend | |
10021 | = reloc.get_r_addend(); | |
10022 | const Symbol* gsym = NULL; | |
10023 | ||
10024 | if (zap_next) | |
10025 | { | |
10026 | // We could arrange to discard these and other relocs for | |
10027 | // tls optimised sequences in the strategy methods, but for | |
10028 | // now do as BFD ld does. | |
10029 | r_type = elfcpp::R_POWERPC_NONE; | |
10030 | zap_next = false; | |
10031 | } | |
cf43a2fe AM |
10032 | |
10033 | // Get the new symbol index. | |
9215b98b | 10034 | Output_section* os = NULL; |
cf43a2fe AM |
10035 | if (r_sym < local_count) |
10036 | { | |
10037 | switch (strategy) | |
10038 | { | |
10039 | case Relocatable_relocs::RELOC_COPY: | |
10040 | case Relocatable_relocs::RELOC_SPECIAL: | |
7404fe1b | 10041 | if (r_sym != 0) |
dd93cd0a | 10042 | { |
7404fe1b AM |
10043 | r_sym = object->symtab_index(r_sym); |
10044 | gold_assert(r_sym != -1U); | |
dd93cd0a | 10045 | } |
cf43a2fe AM |
10046 | break; |
10047 | ||
10048 | case Relocatable_relocs::RELOC_ADJUST_FOR_SECTION_RELA: | |
10049 | { | |
10050 | // We are adjusting a section symbol. We need to find | |
10051 | // the symbol table index of the section symbol for | |
10052 | // the output section corresponding to input section | |
10053 | // in which this symbol is defined. | |
10054 | gold_assert(r_sym < local_count); | |
10055 | bool is_ordinary; | |
10056 | unsigned int shndx = | |
10057 | object->local_symbol_input_shndx(r_sym, &is_ordinary); | |
10058 | gold_assert(is_ordinary); | |
9215b98b | 10059 | os = object->output_section(shndx); |
cf43a2fe AM |
10060 | gold_assert(os != NULL); |
10061 | gold_assert(os->needs_symtab_index()); | |
7404fe1b | 10062 | r_sym = os->symtab_index(); |
cf43a2fe AM |
10063 | } |
10064 | break; | |
10065 | ||
10066 | default: | |
10067 | gold_unreachable(); | |
10068 | } | |
10069 | } | |
10070 | else | |
10071 | { | |
7404fe1b | 10072 | gsym = object->global_symbol(r_sym); |
cf43a2fe AM |
10073 | gold_assert(gsym != NULL); |
10074 | if (gsym->is_forwarder()) | |
10075 | gsym = relinfo->symtab->resolve_forwards(gsym); | |
10076 | ||
10077 | gold_assert(gsym->has_symtab_index()); | |
7404fe1b | 10078 | r_sym = gsym->symtab_index(); |
cf43a2fe AM |
10079 | } |
10080 | ||
10081 | // Get the new offset--the location in the output section where | |
10082 | // this relocation should be applied. | |
cf43a2fe | 10083 | if (static_cast<Address>(offset_in_output_section) != invalid_address) |
7404fe1b | 10084 | offset += offset_in_output_section; |
cf43a2fe AM |
10085 | else |
10086 | { | |
c9269dff AM |
10087 | section_offset_type sot_offset = |
10088 | convert_types<section_offset_type, Address>(offset); | |
cf43a2fe | 10089 | section_offset_type new_sot_offset = |
c9269dff AM |
10090 | output_section->output_offset(object, relinfo->data_shndx, |
10091 | sot_offset); | |
cf43a2fe | 10092 | gold_assert(new_sot_offset != -1); |
7404fe1b | 10093 | offset = new_sot_offset; |
cf43a2fe AM |
10094 | } |
10095 | ||
dd93cd0a AM |
10096 | // In an object file, r_offset is an offset within the section. |
10097 | // In an executable or dynamic object, generated by | |
10098 | // --emit-relocs, r_offset is an absolute address. | |
033bfb73 | 10099 | if (!relocatable) |
dd93cd0a | 10100 | { |
7404fe1b | 10101 | offset += view_address; |
dd93cd0a | 10102 | if (static_cast<Address>(offset_in_output_section) != invalid_address) |
7404fe1b | 10103 | offset -= offset_in_output_section; |
dd93cd0a AM |
10104 | } |
10105 | ||
cf43a2fe | 10106 | // Handle the reloc addend based on the strategy. |
cf43a2fe AM |
10107 | if (strategy == Relocatable_relocs::RELOC_COPY) |
10108 | ; | |
10109 | else if (strategy == Relocatable_relocs::RELOC_ADJUST_FOR_SECTION_RELA) | |
10110 | { | |
7404fe1b | 10111 | const Symbol_value<size>* psymval = object->local_symbol(orig_r_sym); |
033bfb73 CC |
10112 | addend = psymval->value(object, addend); |
10113 | // In a relocatable link, the symbol value is relative to | |
10114 | // the start of the output section. For a non-relocatable | |
10115 | // link, we need to adjust the addend. | |
10116 | if (!relocatable) | |
10117 | { | |
10118 | gold_assert(os != NULL); | |
10119 | addend -= os->address(); | |
10120 | } | |
cf43a2fe AM |
10121 | } |
10122 | else if (strategy == Relocatable_relocs::RELOC_SPECIAL) | |
10123 | { | |
e3a7574e AM |
10124 | if (size == 32) |
10125 | { | |
10126 | if (addend >= 32768) | |
10127 | addend += got2_addend; | |
10128 | } | |
10129 | else if (r_type == elfcpp::R_POWERPC_REL16_HA) | |
10130 | { | |
10131 | r_type = elfcpp::R_POWERPC_ADDR16_HA; | |
dcfc7dd4 | 10132 | addend -= d_offset; |
e3a7574e AM |
10133 | } |
10134 | else if (r_type == elfcpp::R_POWERPC_REL16_LO) | |
10135 | { | |
10136 | r_type = elfcpp::R_POWERPC_ADDR16_LO; | |
dcfc7dd4 | 10137 | addend -= d_offset + 4; |
e3a7574e | 10138 | } |
cf43a2fe AM |
10139 | } |
10140 | else | |
10141 | gold_unreachable(); | |
10142 | ||
033bfb73 | 10143 | if (!relocatable) |
7404fe1b AM |
10144 | { |
10145 | if (r_type == elfcpp::R_POWERPC_GOT_TLSGD16 | |
10146 | || r_type == elfcpp::R_POWERPC_GOT_TLSGD16_LO | |
10147 | || r_type == elfcpp::R_POWERPC_GOT_TLSGD16_HI | |
10148 | || r_type == elfcpp::R_POWERPC_GOT_TLSGD16_HA) | |
10149 | { | |
10150 | // First instruction of a global dynamic sequence, | |
10151 | // arg setup insn. | |
10152 | const bool final = gsym == NULL || gsym->final_value_is_known(); | |
10153 | switch (this->optimize_tls_gd(final)) | |
10154 | { | |
10155 | case tls::TLSOPT_TO_IE: | |
10156 | r_type += (elfcpp::R_POWERPC_GOT_TPREL16 | |
10157 | - elfcpp::R_POWERPC_GOT_TLSGD16); | |
10158 | break; | |
10159 | case tls::TLSOPT_TO_LE: | |
10160 | if (r_type == elfcpp::R_POWERPC_GOT_TLSGD16 | |
10161 | || r_type == elfcpp::R_POWERPC_GOT_TLSGD16_LO) | |
10162 | r_type = elfcpp::R_POWERPC_TPREL16_HA; | |
10163 | else | |
10164 | { | |
10165 | r_type = elfcpp::R_POWERPC_NONE; | |
dcfc7dd4 | 10166 | offset -= d_offset; |
7404fe1b AM |
10167 | } |
10168 | break; | |
10169 | default: | |
10170 | break; | |
10171 | } | |
10172 | } | |
10173 | else if (r_type == elfcpp::R_POWERPC_GOT_TLSLD16 | |
10174 | || r_type == elfcpp::R_POWERPC_GOT_TLSLD16_LO | |
10175 | || r_type == elfcpp::R_POWERPC_GOT_TLSLD16_HI | |
10176 | || r_type == elfcpp::R_POWERPC_GOT_TLSLD16_HA) | |
10177 | { | |
10178 | // First instruction of a local dynamic sequence, | |
10179 | // arg setup insn. | |
10180 | if (this->optimize_tls_ld() == tls::TLSOPT_TO_LE) | |
10181 | { | |
10182 | if (r_type == elfcpp::R_POWERPC_GOT_TLSLD16 | |
10183 | || r_type == elfcpp::R_POWERPC_GOT_TLSLD16_LO) | |
10184 | { | |
10185 | r_type = elfcpp::R_POWERPC_TPREL16_HA; | |
10186 | const Output_section* os = relinfo->layout->tls_segment() | |
10187 | ->first_section(); | |
10188 | gold_assert(os != NULL); | |
10189 | gold_assert(os->needs_symtab_index()); | |
10190 | r_sym = os->symtab_index(); | |
10191 | addend = dtp_offset; | |
10192 | } | |
10193 | else | |
10194 | { | |
10195 | r_type = elfcpp::R_POWERPC_NONE; | |
dcfc7dd4 | 10196 | offset -= d_offset; |
7404fe1b AM |
10197 | } |
10198 | } | |
10199 | } | |
10200 | else if (r_type == elfcpp::R_POWERPC_GOT_TPREL16 | |
10201 | || r_type == elfcpp::R_POWERPC_GOT_TPREL16_LO | |
10202 | || r_type == elfcpp::R_POWERPC_GOT_TPREL16_HI | |
10203 | || r_type == elfcpp::R_POWERPC_GOT_TPREL16_HA) | |
10204 | { | |
10205 | // First instruction of initial exec sequence. | |
10206 | const bool final = gsym == NULL || gsym->final_value_is_known(); | |
10207 | if (this->optimize_tls_ie(final) == tls::TLSOPT_TO_LE) | |
10208 | { | |
10209 | if (r_type == elfcpp::R_POWERPC_GOT_TPREL16 | |
10210 | || r_type == elfcpp::R_POWERPC_GOT_TPREL16_LO) | |
10211 | r_type = elfcpp::R_POWERPC_TPREL16_HA; | |
10212 | else | |
10213 | { | |
10214 | r_type = elfcpp::R_POWERPC_NONE; | |
dcfc7dd4 | 10215 | offset -= d_offset; |
7404fe1b AM |
10216 | } |
10217 | } | |
10218 | } | |
10219 | else if ((size == 64 && r_type == elfcpp::R_PPC64_TLSGD) | |
10220 | || (size == 32 && r_type == elfcpp::R_PPC_TLSGD)) | |
10221 | { | |
10222 | // Second instruction of a global dynamic sequence, | |
10223 | // the __tls_get_addr call | |
10224 | const bool final = gsym == NULL || gsym->final_value_is_known(); | |
10225 | switch (this->optimize_tls_gd(final)) | |
10226 | { | |
10227 | case tls::TLSOPT_TO_IE: | |
10228 | r_type = elfcpp::R_POWERPC_NONE; | |
10229 | zap_next = true; | |
10230 | break; | |
10231 | case tls::TLSOPT_TO_LE: | |
10232 | r_type = elfcpp::R_POWERPC_TPREL16_LO; | |
dcfc7dd4 | 10233 | offset += d_offset; |
7404fe1b AM |
10234 | zap_next = true; |
10235 | break; | |
10236 | default: | |
10237 | break; | |
10238 | } | |
10239 | } | |
10240 | else if ((size == 64 && r_type == elfcpp::R_PPC64_TLSLD) | |
10241 | || (size == 32 && r_type == elfcpp::R_PPC_TLSLD)) | |
10242 | { | |
10243 | // Second instruction of a local dynamic sequence, | |
10244 | // the __tls_get_addr call | |
10245 | if (this->optimize_tls_ld() == tls::TLSOPT_TO_LE) | |
10246 | { | |
10247 | const Output_section* os = relinfo->layout->tls_segment() | |
10248 | ->first_section(); | |
10249 | gold_assert(os != NULL); | |
10250 | gold_assert(os->needs_symtab_index()); | |
10251 | r_sym = os->symtab_index(); | |
10252 | addend = dtp_offset; | |
10253 | r_type = elfcpp::R_POWERPC_TPREL16_LO; | |
dcfc7dd4 | 10254 | offset += d_offset; |
7404fe1b AM |
10255 | zap_next = true; |
10256 | } | |
10257 | } | |
10258 | else if (r_type == elfcpp::R_POWERPC_TLS) | |
10259 | { | |
10260 | // Second instruction of an initial exec sequence | |
10261 | const bool final = gsym == NULL || gsym->final_value_is_known(); | |
10262 | if (this->optimize_tls_ie(final) == tls::TLSOPT_TO_LE) | |
10263 | { | |
10264 | r_type = elfcpp::R_POWERPC_TPREL16_LO; | |
dcfc7dd4 | 10265 | offset += d_offset; |
7404fe1b AM |
10266 | } |
10267 | } | |
10268 | } | |
10269 | ||
10270 | reloc_write.put_r_offset(offset); | |
10271 | reloc_write.put_r_info(elfcpp::elf_r_info<size>(r_sym, r_type)); | |
10272 | reloc_write.put_r_addend(addend); | |
cf43a2fe AM |
10273 | |
10274 | pwrite += reloc_size; | |
10275 | } | |
10276 | ||
10277 | gold_assert(static_cast<section_size_type>(pwrite - reloc_view) | |
10278 | == reloc_view_size); | |
42cacb20 DE |
10279 | } |
10280 | ||
ec661b9d | 10281 | // Return the value to use for a dynamic symbol which requires special |
42cacb20 DE |
10282 | // treatment. This is how we support equality comparisons of function |
10283 | // pointers across shared library boundaries, as described in the | |
10284 | // processor specific ABI supplement. | |
10285 | ||
10286 | template<int size, bool big_endian> | |
10287 | uint64_t | |
10288 | Target_powerpc<size, big_endian>::do_dynsym_value(const Symbol* gsym) const | |
10289 | { | |
cf43a2fe AM |
10290 | if (size == 32) |
10291 | { | |
10292 | gold_assert(gsym->is_from_dynobj() && gsym->has_plt_offset()); | |
ec661b9d AM |
10293 | for (typename Stub_tables::const_iterator p = this->stub_tables_.begin(); |
10294 | p != this->stub_tables_.end(); | |
10295 | ++p) | |
10296 | { | |
7e57d19e AM |
10297 | const typename Stub_table<size, big_endian>::Plt_stub_ent* ent |
10298 | = (*p)->find_plt_call_entry(gsym); | |
10299 | if (ent != NULL) | |
10300 | return (*p)->stub_address() + ent->off_; | |
ec661b9d | 10301 | } |
c9824451 | 10302 | } |
9055360d AM |
10303 | else if (this->abiversion() >= 2) |
10304 | { | |
faa2211d AM |
10305 | Address off = this->glink_section()->find_global_entry(gsym); |
10306 | if (off != invalid_address) | |
9055360d AM |
10307 | return this->glink_section()->global_entry_address() + off; |
10308 | } | |
ec661b9d | 10309 | gold_unreachable(); |
c9824451 AM |
10310 | } |
10311 | ||
10312 | // Return the PLT address to use for a local symbol. | |
10313 | template<int size, bool big_endian> | |
10314 | uint64_t | |
10315 | Target_powerpc<size, big_endian>::do_plt_address_for_local( | |
10316 | const Relobj* object, | |
10317 | unsigned int symndx) const | |
10318 | { | |
10319 | if (size == 32) | |
10320 | { | |
10321 | const Sized_relobj<size, big_endian>* relobj | |
10322 | = static_cast<const Sized_relobj<size, big_endian>*>(object); | |
ec661b9d AM |
10323 | for (typename Stub_tables::const_iterator p = this->stub_tables_.begin(); |
10324 | p != this->stub_tables_.end(); | |
10325 | ++p) | |
10326 | { | |
7e57d19e AM |
10327 | const typename Stub_table<size, big_endian>::Plt_stub_ent* ent |
10328 | = (*p)->find_plt_call_entry(relobj->sized_relobj(), symndx); | |
10329 | if (ent != NULL) | |
10330 | return (*p)->stub_address() + ent->off_; | |
ec661b9d | 10331 | } |
c9824451 | 10332 | } |
ec661b9d | 10333 | gold_unreachable(); |
c9824451 AM |
10334 | } |
10335 | ||
10336 | // Return the PLT address to use for a global symbol. | |
10337 | template<int size, bool big_endian> | |
10338 | uint64_t | |
10339 | Target_powerpc<size, big_endian>::do_plt_address_for_global( | |
10340 | const Symbol* gsym) const | |
10341 | { | |
10342 | if (size == 32) | |
10343 | { | |
ec661b9d AM |
10344 | for (typename Stub_tables::const_iterator p = this->stub_tables_.begin(); |
10345 | p != this->stub_tables_.end(); | |
10346 | ++p) | |
10347 | { | |
7e57d19e AM |
10348 | const typename Stub_table<size, big_endian>::Plt_stub_ent* ent |
10349 | = (*p)->find_plt_call_entry(gsym); | |
10350 | if (ent != NULL) | |
10351 | return (*p)->stub_address() + ent->off_; | |
ec661b9d | 10352 | } |
cf43a2fe | 10353 | } |
9055360d AM |
10354 | else if (this->abiversion() >= 2) |
10355 | { | |
faa2211d AM |
10356 | Address off = this->glink_section()->find_global_entry(gsym); |
10357 | if (off != invalid_address) | |
9055360d AM |
10358 | return this->glink_section()->global_entry_address() + off; |
10359 | } | |
ec661b9d | 10360 | gold_unreachable(); |
42cacb20 DE |
10361 | } |
10362 | ||
bd73a62d AM |
10363 | // Return the offset to use for the GOT_INDX'th got entry which is |
10364 | // for a local tls symbol specified by OBJECT, SYMNDX. | |
10365 | template<int size, bool big_endian> | |
10366 | int64_t | |
10367 | Target_powerpc<size, big_endian>::do_tls_offset_for_local( | |
10368 | const Relobj* object, | |
10369 | unsigned int symndx, | |
10370 | unsigned int got_indx) const | |
10371 | { | |
10372 | const Powerpc_relobj<size, big_endian>* ppc_object | |
10373 | = static_cast<const Powerpc_relobj<size, big_endian>*>(object); | |
10374 | if (ppc_object->local_symbol(symndx)->is_tls_symbol()) | |
10375 | { | |
10376 | for (Got_type got_type = GOT_TYPE_TLSGD; | |
10377 | got_type <= GOT_TYPE_TPREL; | |
10378 | got_type = Got_type(got_type + 1)) | |
10379 | if (ppc_object->local_has_got_offset(symndx, got_type)) | |
10380 | { | |
10381 | unsigned int off = ppc_object->local_got_offset(symndx, got_type); | |
10382 | if (got_type == GOT_TYPE_TLSGD) | |
10383 | off += size / 8; | |
10384 | if (off == got_indx * (size / 8)) | |
10385 | { | |
10386 | if (got_type == GOT_TYPE_TPREL) | |
10387 | return -tp_offset; | |
10388 | else | |
10389 | return -dtp_offset; | |
10390 | } | |
10391 | } | |
10392 | } | |
10393 | gold_unreachable(); | |
10394 | } | |
10395 | ||
10396 | // Return the offset to use for the GOT_INDX'th got entry which is | |
10397 | // for global tls symbol GSYM. | |
10398 | template<int size, bool big_endian> | |
10399 | int64_t | |
10400 | Target_powerpc<size, big_endian>::do_tls_offset_for_global( | |
10401 | Symbol* gsym, | |
10402 | unsigned int got_indx) const | |
10403 | { | |
10404 | if (gsym->type() == elfcpp::STT_TLS) | |
10405 | { | |
10406 | for (Got_type got_type = GOT_TYPE_TLSGD; | |
10407 | got_type <= GOT_TYPE_TPREL; | |
10408 | got_type = Got_type(got_type + 1)) | |
10409 | if (gsym->has_got_offset(got_type)) | |
10410 | { | |
10411 | unsigned int off = gsym->got_offset(got_type); | |
10412 | if (got_type == GOT_TYPE_TLSGD) | |
10413 | off += size / 8; | |
10414 | if (off == got_indx * (size / 8)) | |
10415 | { | |
10416 | if (got_type == GOT_TYPE_TPREL) | |
10417 | return -tp_offset; | |
10418 | else | |
10419 | return -dtp_offset; | |
10420 | } | |
10421 | } | |
10422 | } | |
10423 | gold_unreachable(); | |
10424 | } | |
10425 | ||
42cacb20 DE |
10426 | // The selector for powerpc object files. |
10427 | ||
10428 | template<int size, bool big_endian> | |
10429 | class Target_selector_powerpc : public Target_selector | |
10430 | { | |
10431 | public: | |
10432 | Target_selector_powerpc() | |
edc27beb AM |
10433 | : Target_selector(size == 64 ? elfcpp::EM_PPC64 : elfcpp::EM_PPC, |
10434 | size, big_endian, | |
03ef7571 ILT |
10435 | (size == 64 |
10436 | ? (big_endian ? "elf64-powerpc" : "elf64-powerpcle") | |
10437 | : (big_endian ? "elf32-powerpc" : "elf32-powerpcle")), | |
10438 | (size == 64 | |
10439 | ? (big_endian ? "elf64ppc" : "elf64lppc") | |
10440 | : (big_endian ? "elf32ppc" : "elf32lppc"))) | |
42cacb20 DE |
10441 | { } |
10442 | ||
2e702c99 RM |
10443 | virtual Target* |
10444 | do_instantiate_target() | |
7f055c20 | 10445 | { return new Target_powerpc<size, big_endian>(); } |
42cacb20 DE |
10446 | }; |
10447 | ||
10448 | Target_selector_powerpc<32, true> target_selector_ppc32; | |
10449 | Target_selector_powerpc<32, false> target_selector_ppc32le; | |
10450 | Target_selector_powerpc<64, true> target_selector_ppc64; | |
10451 | Target_selector_powerpc<64, false> target_selector_ppc64le; | |
10452 | ||
decdd3bc AM |
10453 | // Instantiate these constants for -O0 |
10454 | template<int size, bool big_endian> | |
9055360d AM |
10455 | const typename Output_data_glink<size, big_endian>::Address |
10456 | Output_data_glink<size, big_endian>::invalid_address; | |
10457 | template<int size, bool big_endian> | |
decdd3bc AM |
10458 | const typename Stub_table<size, big_endian>::Address |
10459 | Stub_table<size, big_endian>::invalid_address; | |
10460 | template<int size, bool big_endian> | |
10461 | const typename Target_powerpc<size, big_endian>::Address | |
10462 | Target_powerpc<size, big_endian>::invalid_address; | |
10463 | ||
42cacb20 | 10464 | } // End anonymous namespace. |