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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), | |
ec661b9d | 610 | got_(NULL), plt_(NULL), iplt_(NULL), brlt_section_(NULL), |
5edad15d | 611 | glink_(NULL), rela_dyn_(NULL), copy_relocs_(), |
43819297 | 612 | tlsld_got_offset_(-1U), |
7e57d19e | 613 | stub_tables_(), branch_lookup_table_(), branch_info_(), tocsave_loc_(), |
7ee7ff70 AM |
614 | plt_thread_safe_(false), plt_localentry0_(false), |
615 | plt_localentry0_init_(false), has_localentry0_(false), | |
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 | ||
cf43a2fe AM |
863 | // Get the .glink section. |
864 | const Output_data_glink<size, big_endian>* | |
865 | glink_section() const | |
866 | { | |
867 | gold_assert(this->glink_ != NULL); | |
868 | return this->glink_; | |
869 | } | |
870 | ||
9055360d AM |
871 | Output_data_glink<size, big_endian>* |
872 | glink_section() | |
873 | { | |
874 | gold_assert(this->glink_ != NULL); | |
875 | return this->glink_; | |
876 | } | |
877 | ||
9d5781f8 AM |
878 | bool has_glink() const |
879 | { return this->glink_ != NULL; } | |
880 | ||
cf43a2fe AM |
881 | // Get the GOT section. |
882 | const Output_data_got_powerpc<size, big_endian>* | |
883 | got_section() const | |
884 | { | |
885 | gold_assert(this->got_ != NULL); | |
886 | return this->got_; | |
887 | } | |
888 | ||
26a4e9cb AM |
889 | // Get the GOT section, creating it if necessary. |
890 | Output_data_got_powerpc<size, big_endian>* | |
891 | got_section(Symbol_table*, Layout*); | |
892 | ||
cf43a2fe AM |
893 | Object* |
894 | do_make_elf_object(const std::string&, Input_file*, off_t, | |
895 | const elfcpp::Ehdr<size, big_endian>&); | |
896 | ||
0e70b911 CC |
897 | // Return the number of entries in the GOT. |
898 | unsigned int | |
899 | got_entry_count() const | |
900 | { | |
901 | if (this->got_ == NULL) | |
902 | return 0; | |
903 | return this->got_size() / (size / 8); | |
904 | } | |
905 | ||
906 | // Return the number of entries in the PLT. | |
907 | unsigned int | |
908 | plt_entry_count() const; | |
909 | ||
910 | // Return the offset of the first non-reserved PLT entry. | |
911 | unsigned int | |
b4f7960d AM |
912 | first_plt_entry_offset() const |
913 | { | |
914 | if (size == 32) | |
915 | return 0; | |
916 | if (this->abiversion() >= 2) | |
917 | return 16; | |
918 | return 24; | |
919 | } | |
0e70b911 CC |
920 | |
921 | // Return the size of each PLT entry. | |
922 | unsigned int | |
b4f7960d AM |
923 | plt_entry_size() const |
924 | { | |
925 | if (size == 32) | |
926 | return 4; | |
927 | if (this->abiversion() >= 2) | |
928 | return 8; | |
929 | return 24; | |
930 | } | |
0e70b911 | 931 | |
d49044c7 AM |
932 | Output_data_save_res<size, big_endian>* |
933 | savres_section() const | |
934 | { | |
935 | return this->savres_section_; | |
936 | } | |
937 | ||
e81fea4d AM |
938 | // Add any special sections for this symbol to the gc work list. |
939 | // For powerpc64, this adds the code section of a function | |
940 | // descriptor. | |
941 | void | |
942 | do_gc_mark_symbol(Symbol_table* symtab, Symbol* sym) const; | |
943 | ||
944 | // Handle target specific gc actions when adding a gc reference from | |
945 | // SRC_OBJ, SRC_SHNDX to a location specified by DST_OBJ, DST_SHNDX | |
946 | // and DST_OFF. For powerpc64, this adds a referenc to the code | |
947 | // section of a function descriptor. | |
948 | void | |
949 | do_gc_add_reference(Symbol_table* symtab, | |
efc6fa12 | 950 | Relobj* src_obj, |
e81fea4d | 951 | unsigned int src_shndx, |
efc6fa12 | 952 | Relobj* dst_obj, |
e81fea4d AM |
953 | unsigned int dst_shndx, |
954 | Address dst_off) const; | |
955 | ||
ec661b9d AM |
956 | typedef std::vector<Stub_table<size, big_endian>*> Stub_tables; |
957 | const Stub_tables& | |
958 | stub_tables() const | |
959 | { return this->stub_tables_; } | |
960 | ||
961 | const Output_data_brlt_powerpc<size, big_endian>* | |
962 | brlt_section() const | |
963 | { return this->brlt_section_; } | |
964 | ||
965 | void | |
966 | add_branch_lookup_table(Address to) | |
967 | { | |
968 | unsigned int off = this->branch_lookup_table_.size() * (size / 8); | |
969 | this->branch_lookup_table_.insert(std::make_pair(to, off)); | |
970 | } | |
971 | ||
972 | Address | |
973 | find_branch_lookup_table(Address to) | |
974 | { | |
975 | typename Branch_lookup_table::const_iterator p | |
976 | = this->branch_lookup_table_.find(to); | |
977 | return p == this->branch_lookup_table_.end() ? invalid_address : p->second; | |
978 | } | |
979 | ||
980 | void | |
981 | write_branch_lookup_table(unsigned char *oview) | |
982 | { | |
983 | for (typename Branch_lookup_table::const_iterator p | |
984 | = this->branch_lookup_table_.begin(); | |
985 | p != this->branch_lookup_table_.end(); | |
986 | ++p) | |
987 | { | |
4d5effb9 | 988 | elfcpp::Swap<size, big_endian>::writeval(oview + p->second, p->first); |
ec661b9d AM |
989 | } |
990 | } | |
991 | ||
590b87ff AM |
992 | // Wrapper used after relax to define a local symbol in output data, |
993 | // from the end if value < 0. | |
994 | void | |
995 | define_local(Symbol_table* symtab, const char* name, | |
996 | Output_data* od, Address value, unsigned int symsize) | |
997 | { | |
998 | Symbol* sym | |
999 | = symtab->define_in_output_data(name, NULL, Symbol_table::PREDEFINED, | |
1000 | od, value, symsize, elfcpp::STT_NOTYPE, | |
1001 | elfcpp::STB_LOCAL, elfcpp::STV_HIDDEN, 0, | |
1002 | static_cast<Signed_address>(value) < 0, | |
1003 | false); | |
1004 | // We are creating this symbol late, so need to fix up things | |
1005 | // done early in Layout::finalize. | |
1006 | sym->set_dynsym_index(-1U); | |
1007 | } | |
1008 | ||
9e69ed50 AM |
1009 | bool |
1010 | plt_thread_safe() const | |
1011 | { return this->plt_thread_safe_; } | |
1012 | ||
7ee7ff70 AM |
1013 | bool |
1014 | plt_localentry0() const | |
1015 | { return this->plt_localentry0_; } | |
1016 | ||
1017 | void | |
1018 | set_has_localentry0() | |
1019 | { | |
1020 | this->has_localentry0_ = true; | |
1021 | } | |
1022 | ||
1023 | bool | |
1024 | is_elfv2_localentry0(const Symbol* gsym) const | |
1025 | { | |
1026 | return (size == 64 | |
1027 | && this->abiversion() >= 2 | |
1028 | && this->plt_localentry0() | |
1029 | && gsym->type() == elfcpp::STT_FUNC | |
1030 | && gsym->is_defined() | |
565ed01a AM |
1031 | && gsym->nonvis() >> 3 == 0 |
1032 | && !gsym->non_zero_localentry()); | |
7ee7ff70 AM |
1033 | } |
1034 | ||
1035 | bool | |
1036 | is_elfv2_localentry0(const Sized_relobj_file<size, big_endian>* object, | |
1037 | unsigned int r_sym) const | |
1038 | { | |
1039 | const Powerpc_relobj<size, big_endian>* ppc_object | |
1040 | = static_cast<const Powerpc_relobj<size, big_endian>*>(object); | |
1041 | ||
1042 | if (size == 64 | |
1043 | && this->abiversion() >= 2 | |
1044 | && this->plt_localentry0() | |
1045 | && ppc_object->st_other(r_sym) >> 5 == 0) | |
1046 | { | |
1047 | const Symbol_value<size>* psymval = object->local_symbol(r_sym); | |
1048 | bool is_ordinary; | |
1049 | if (!psymval->is_ifunc_symbol() | |
1050 | && psymval->input_shndx(&is_ordinary) != elfcpp::SHN_UNDEF | |
1051 | && is_ordinary) | |
1052 | return true; | |
1053 | } | |
1054 | return false; | |
1055 | } | |
1056 | ||
565ed01a AM |
1057 | // Remember any symbols seen with non-zero localentry, even those |
1058 | // not providing a definition | |
1059 | bool | |
1060 | resolve(Symbol* to, const elfcpp::Sym<size, big_endian>& sym, Object*, | |
1061 | const char*) | |
1062 | { | |
1063 | if (size == 64) | |
1064 | { | |
1065 | unsigned char st_other = sym.get_st_other(); | |
1066 | if ((st_other & elfcpp::STO_PPC64_LOCAL_MASK) != 0) | |
1067 | to->set_non_zero_localentry(); | |
1068 | } | |
1069 | // We haven't resolved anything, continue normal processing. | |
1070 | return false; | |
1071 | } | |
1072 | ||
b4f7960d | 1073 | int |
aacb3b6d | 1074 | abiversion() const |
b4f7960d AM |
1075 | { return this->processor_specific_flags() & elfcpp::EF_PPC64_ABI; } |
1076 | ||
1077 | void | |
aacb3b6d | 1078 | set_abiversion(int ver) |
b4f7960d AM |
1079 | { |
1080 | elfcpp::Elf_Word flags = this->processor_specific_flags(); | |
1081 | flags &= ~elfcpp::EF_PPC64_ABI; | |
1082 | flags |= ver & elfcpp::EF_PPC64_ABI; | |
1083 | this->set_processor_specific_flags(flags); | |
1084 | } | |
1085 | ||
34e0882b AM |
1086 | Symbol* |
1087 | tls_get_addr_opt() const | |
1088 | { return this->tls_get_addr_opt_; } | |
1089 | ||
1090 | Symbol* | |
1091 | tls_get_addr() const | |
1092 | { return this->tls_get_addr_; } | |
1093 | ||
1094 | // If optimizing __tls_get_addr calls, whether this is the | |
1095 | // "__tls_get_addr" symbol. | |
1096 | bool | |
1097 | is_tls_get_addr_opt(const Symbol* gsym) const | |
1098 | { | |
1099 | return this->tls_get_addr_opt_ && (gsym == this->tls_get_addr_ | |
1100 | || gsym == this->tls_get_addr_opt_); | |
1101 | } | |
1102 | ||
1103 | bool | |
1104 | replace_tls_get_addr(const Symbol* gsym) const | |
1105 | { return this->tls_get_addr_opt_ && gsym == this->tls_get_addr_; } | |
1106 | ||
1107 | void | |
1108 | set_has_tls_get_addr_opt() | |
1109 | { this->has_tls_get_addr_opt_ = true; } | |
1110 | ||
aacb3b6d | 1111 | // Offset to toc save stack slot |
b4f7960d | 1112 | int |
aacb3b6d | 1113 | stk_toc() const |
b4f7960d AM |
1114 | { return this->abiversion() < 2 ? 40 : 24; } |
1115 | ||
34e0882b AM |
1116 | // Offset to linker save stack slot. ELFv2 doesn't have a linker word, |
1117 | // so use the CR save slot. Used only by __tls_get_addr call stub, | |
1118 | // relying on __tls_get_addr not saving CR itself. | |
1119 | int | |
1120 | stk_linker() const | |
1121 | { return this->abiversion() < 2 ? 32 : 8; } | |
1122 | ||
42cacb20 DE |
1123 | private: |
1124 | ||
e3deeb9c AM |
1125 | class Track_tls |
1126 | { | |
1127 | public: | |
1128 | enum Tls_get_addr | |
1129 | { | |
1130 | NOT_EXPECTED = 0, | |
1131 | EXPECTED = 1, | |
1132 | SKIP = 2, | |
1133 | NORMAL = 3 | |
1134 | }; | |
1135 | ||
1136 | Track_tls() | |
aacb3b6d | 1137 | : tls_get_addr_state_(NOT_EXPECTED), |
e3deeb9c AM |
1138 | relinfo_(NULL), relnum_(0), r_offset_(0) |
1139 | { } | |
1140 | ||
1141 | ~Track_tls() | |
1142 | { | |
aacb3b6d | 1143 | if (this->tls_get_addr_state_ != NOT_EXPECTED) |
e3deeb9c AM |
1144 | this->missing(); |
1145 | } | |
1146 | ||
1147 | void | |
1148 | missing(void) | |
1149 | { | |
1150 | if (this->relinfo_ != NULL) | |
1151 | gold_error_at_location(this->relinfo_, this->relnum_, this->r_offset_, | |
1152 | _("missing expected __tls_get_addr call")); | |
1153 | } | |
1154 | ||
1155 | void | |
1156 | expect_tls_get_addr_call( | |
1157 | const Relocate_info<size, big_endian>* relinfo, | |
1158 | size_t relnum, | |
1159 | Address r_offset) | |
1160 | { | |
aacb3b6d | 1161 | this->tls_get_addr_state_ = EXPECTED; |
e3deeb9c AM |
1162 | this->relinfo_ = relinfo; |
1163 | this->relnum_ = relnum; | |
1164 | this->r_offset_ = r_offset; | |
1165 | } | |
1166 | ||
1167 | void | |
1168 | expect_tls_get_addr_call() | |
aacb3b6d | 1169 | { this->tls_get_addr_state_ = EXPECTED; } |
e3deeb9c AM |
1170 | |
1171 | void | |
1172 | skip_next_tls_get_addr_call() | |
aacb3b6d | 1173 | {this->tls_get_addr_state_ = SKIP; } |
e3deeb9c AM |
1174 | |
1175 | Tls_get_addr | |
34e0882b AM |
1176 | maybe_skip_tls_get_addr_call(Target_powerpc<size, big_endian>* target, |
1177 | unsigned int r_type, const Symbol* gsym) | |
e3deeb9c AM |
1178 | { |
1179 | bool is_tls_call = ((r_type == elfcpp::R_POWERPC_REL24 | |
1180 | || r_type == elfcpp::R_PPC_PLTREL24) | |
1181 | && gsym != NULL | |
34e0882b AM |
1182 | && (gsym == target->tls_get_addr() |
1183 | || gsym == target->tls_get_addr_opt())); | |
aacb3b6d AM |
1184 | Tls_get_addr last_tls = this->tls_get_addr_state_; |
1185 | this->tls_get_addr_state_ = NOT_EXPECTED; | |
e3deeb9c AM |
1186 | if (is_tls_call && last_tls != EXPECTED) |
1187 | return last_tls; | |
1188 | else if (!is_tls_call && last_tls != NOT_EXPECTED) | |
1189 | { | |
1190 | this->missing(); | |
1191 | return EXPECTED; | |
1192 | } | |
1193 | return NORMAL; | |
1194 | } | |
1195 | ||
1196 | private: | |
1197 | // What we're up to regarding calls to __tls_get_addr. | |
1198 | // On powerpc, the branch and link insn making a call to | |
1199 | // __tls_get_addr is marked with a relocation, R_PPC64_TLSGD, | |
1200 | // R_PPC64_TLSLD, R_PPC_TLSGD or R_PPC_TLSLD, in addition to the | |
1201 | // usual R_POWERPC_REL24 or R_PPC_PLTREL25 relocation on a call. | |
1202 | // The marker relocation always comes first, and has the same | |
1203 | // symbol as the reloc on the insn setting up the __tls_get_addr | |
1204 | // argument. This ties the arg setup insn with the call insn, | |
1205 | // allowing ld to safely optimize away the call. We check that | |
1206 | // every call to __tls_get_addr has a marker relocation, and that | |
1207 | // every marker relocation is on a call to __tls_get_addr. | |
aacb3b6d | 1208 | Tls_get_addr tls_get_addr_state_; |
e3deeb9c AM |
1209 | // Info about the last reloc for error message. |
1210 | const Relocate_info<size, big_endian>* relinfo_; | |
1211 | size_t relnum_; | |
1212 | Address r_offset_; | |
1213 | }; | |
1214 | ||
42cacb20 | 1215 | // The class which scans relocations. |
e3deeb9c | 1216 | class Scan : protected Track_tls |
42cacb20 DE |
1217 | { |
1218 | public: | |
bfdfa4cd AM |
1219 | typedef typename elfcpp::Elf_types<size>::Elf_Addr Address; |
1220 | ||
42cacb20 | 1221 | Scan() |
e3deeb9c | 1222 | : Track_tls(), issued_non_pic_error_(false) |
42cacb20 DE |
1223 | { } |
1224 | ||
95a2c8d6 | 1225 | static inline int |
88b8e639 | 1226 | get_reference_flags(unsigned int r_type, const Target_powerpc* target); |
95a2c8d6 | 1227 | |
42cacb20 | 1228 | inline void |
ad0f2072 | 1229 | local(Symbol_table* symtab, Layout* layout, Target_powerpc* target, |
6fa2a40b | 1230 | Sized_relobj_file<size, big_endian>* object, |
42cacb20 DE |
1231 | unsigned int data_shndx, |
1232 | Output_section* output_section, | |
1233 | const elfcpp::Rela<size, big_endian>& reloc, unsigned int r_type, | |
bfdfa4cd AM |
1234 | const elfcpp::Sym<size, big_endian>& lsym, |
1235 | bool is_discarded); | |
42cacb20 DE |
1236 | |
1237 | inline void | |
ad0f2072 | 1238 | global(Symbol_table* symtab, Layout* layout, Target_powerpc* target, |
6fa2a40b | 1239 | Sized_relobj_file<size, big_endian>* object, |
42cacb20 DE |
1240 | unsigned int data_shndx, |
1241 | Output_section* output_section, | |
1242 | const elfcpp::Rela<size, big_endian>& reloc, unsigned int r_type, | |
1243 | Symbol* gsym); | |
1244 | ||
21bb3914 ST |
1245 | inline bool |
1246 | local_reloc_may_be_function_pointer(Symbol_table* , Layout* , | |
1247 | Target_powerpc* , | |
f6971787 | 1248 | Sized_relobj_file<size, big_endian>* relobj, |
21bb3914 | 1249 | unsigned int , |
2e702c99 RM |
1250 | Output_section* , |
1251 | const elfcpp::Rela<size, big_endian>& , | |
4d9aa155 | 1252 | unsigned int r_type, |
2e702c99 | 1253 | const elfcpp::Sym<size, big_endian>&) |
4d9aa155 AM |
1254 | { |
1255 | // PowerPC64 .opd is not folded, so any identical function text | |
1256 | // may be folded and we'll still keep function addresses distinct. | |
1257 | // That means no reloc is of concern here. | |
1258 | if (size == 64) | |
f6971787 AM |
1259 | { |
1260 | Powerpc_relobj<size, big_endian>* ppcobj = static_cast | |
1261 | <Powerpc_relobj<size, big_endian>*>(relobj); | |
1262 | if (ppcobj->abiversion() == 1) | |
1263 | return false; | |
1264 | } | |
1265 | // For 32-bit and ELFv2, conservatively assume anything but calls to | |
4d9aa155 AM |
1266 | // function code might be taking the address of the function. |
1267 | return !is_branch_reloc(r_type); | |
1268 | } | |
21bb3914 ST |
1269 | |
1270 | inline bool | |
1271 | global_reloc_may_be_function_pointer(Symbol_table* , Layout* , | |
1272 | Target_powerpc* , | |
f6971787 | 1273 | Sized_relobj_file<size, big_endian>* relobj, |
2e702c99 RM |
1274 | unsigned int , |
1275 | Output_section* , | |
4d9aa155 AM |
1276 | const elfcpp::Rela<size, big_endian>& , |
1277 | unsigned int r_type, | |
1278 | Symbol*) | |
1279 | { | |
1280 | // As above. | |
1281 | if (size == 64) | |
f6971787 AM |
1282 | { |
1283 | Powerpc_relobj<size, big_endian>* ppcobj = static_cast | |
1284 | <Powerpc_relobj<size, big_endian>*>(relobj); | |
1285 | if (ppcobj->abiversion() == 1) | |
1286 | return false; | |
1287 | } | |
4d9aa155 AM |
1288 | return !is_branch_reloc(r_type); |
1289 | } | |
21bb3914 | 1290 | |
b3ccdeb5 | 1291 | static bool |
9055360d AM |
1292 | reloc_needs_plt_for_ifunc(Target_powerpc<size, big_endian>* target, |
1293 | Sized_relobj_file<size, big_endian>* object, | |
b3ccdeb5 AM |
1294 | unsigned int r_type, bool report_err); |
1295 | ||
42cacb20 DE |
1296 | private: |
1297 | static void | |
6fa2a40b | 1298 | unsupported_reloc_local(Sized_relobj_file<size, big_endian>*, |
42cacb20 DE |
1299 | unsigned int r_type); |
1300 | ||
1301 | static void | |
6fa2a40b | 1302 | unsupported_reloc_global(Sized_relobj_file<size, big_endian>*, |
42cacb20 DE |
1303 | unsigned int r_type, Symbol*); |
1304 | ||
1305 | static void | |
1306 | generate_tls_call(Symbol_table* symtab, Layout* layout, | |
1307 | Target_powerpc* target); | |
1308 | ||
1309 | void | |
1310 | check_non_pic(Relobj*, unsigned int r_type); | |
1311 | ||
1312 | // Whether we have issued an error about a non-PIC compilation. | |
1313 | bool issued_non_pic_error_; | |
1314 | }; | |
1315 | ||
1611bc4a AM |
1316 | bool |
1317 | symval_for_branch(const Symbol_table* symtab, | |
6c77229c | 1318 | const Sized_symbol<size>* gsym, |
3ea0a085 | 1319 | Powerpc_relobj<size, big_endian>* object, |
1611bc4a | 1320 | Address *value, unsigned int *dest_shndx); |
3ea0a085 | 1321 | |
42cacb20 | 1322 | // The class which implements relocation. |
e3deeb9c | 1323 | class Relocate : protected Track_tls |
42cacb20 DE |
1324 | { |
1325 | public: | |
dd93cd0a AM |
1326 | // Use 'at' branch hints when true, 'y' when false. |
1327 | // FIXME maybe: set this with an option. | |
1328 | static const bool is_isa_v2 = true; | |
1329 | ||
dd93cd0a | 1330 | Relocate() |
e3deeb9c | 1331 | : Track_tls() |
dd93cd0a AM |
1332 | { } |
1333 | ||
42cacb20 DE |
1334 | // Do a relocation. Return false if the caller should not issue |
1335 | // any warnings about this relocation. | |
1336 | inline bool | |
91a65d2f AM |
1337 | relocate(const Relocate_info<size, big_endian>*, unsigned int, |
1338 | Target_powerpc*, Output_section*, size_t, const unsigned char*, | |
1339 | const Sized_symbol<size>*, const Symbol_value<size>*, | |
1340 | unsigned char*, typename elfcpp::Elf_types<size>::Elf_Addr, | |
42cacb20 | 1341 | section_size_type); |
42cacb20 DE |
1342 | }; |
1343 | ||
168a4726 AM |
1344 | class Relocate_comdat_behavior |
1345 | { | |
1346 | public: | |
1347 | // Decide what the linker should do for relocations that refer to | |
1348 | // discarded comdat sections. | |
1349 | inline Comdat_behavior | |
1350 | get(const char* name) | |
1351 | { | |
1352 | gold::Default_comdat_behavior default_behavior; | |
1353 | Comdat_behavior ret = default_behavior.get(name); | |
1354 | if (ret == CB_WARNING) | |
1355 | { | |
1356 | if (size == 32 | |
1357 | && (strcmp(name, ".fixup") == 0 | |
1358 | || strcmp(name, ".got2") == 0)) | |
1359 | ret = CB_IGNORE; | |
1360 | if (size == 64 | |
1361 | && (strcmp(name, ".opd") == 0 | |
1362 | || strcmp(name, ".toc") == 0 | |
1363 | || strcmp(name, ".toc1") == 0)) | |
1364 | ret = CB_IGNORE; | |
1365 | } | |
1366 | return ret; | |
1367 | } | |
1368 | }; | |
1369 | ||
dd93cd0a AM |
1370 | // Optimize the TLS relocation type based on what we know about the |
1371 | // symbol. IS_FINAL is true if the final address of this symbol is | |
1372 | // known at link time. | |
1373 | ||
1374 | tls::Tls_optimization | |
1375 | optimize_tls_gd(bool is_final) | |
1376 | { | |
1377 | // If we are generating a shared library, then we can't do anything | |
1378 | // in the linker. | |
aacb3b6d AM |
1379 | if (parameters->options().shared() |
1380 | || !parameters->options().tls_optimize()) | |
dd93cd0a AM |
1381 | return tls::TLSOPT_NONE; |
1382 | ||
1383 | if (!is_final) | |
1384 | return tls::TLSOPT_TO_IE; | |
1385 | return tls::TLSOPT_TO_LE; | |
1386 | } | |
1387 | ||
1388 | tls::Tls_optimization | |
1389 | optimize_tls_ld() | |
1390 | { | |
aacb3b6d AM |
1391 | if (parameters->options().shared() |
1392 | || !parameters->options().tls_optimize()) | |
dd93cd0a AM |
1393 | return tls::TLSOPT_NONE; |
1394 | ||
1395 | return tls::TLSOPT_TO_LE; | |
1396 | } | |
1397 | ||
1398 | tls::Tls_optimization | |
1399 | optimize_tls_ie(bool is_final) | |
1400 | { | |
aacb3b6d AM |
1401 | if (!is_final |
1402 | || parameters->options().shared() | |
1403 | || !parameters->options().tls_optimize()) | |
dd93cd0a AM |
1404 | return tls::TLSOPT_NONE; |
1405 | ||
1406 | return tls::TLSOPT_TO_LE; | |
1407 | } | |
cf43a2fe | 1408 | |
cf43a2fe AM |
1409 | // Create glink. |
1410 | void | |
1411 | make_glink_section(Layout*); | |
42cacb20 | 1412 | |
cf43a2fe AM |
1413 | // Create the PLT section. |
1414 | void | |
40b469d7 | 1415 | make_plt_section(Symbol_table*, Layout*); |
42cacb20 | 1416 | |
e5d5f5ed | 1417 | void |
40b469d7 | 1418 | make_iplt_section(Symbol_table*, Layout*); |
e5d5f5ed | 1419 | |
ec661b9d AM |
1420 | void |
1421 | make_brlt_section(Layout*); | |
1422 | ||
42cacb20 DE |
1423 | // Create a PLT entry for a global symbol. |
1424 | void | |
ec661b9d | 1425 | make_plt_entry(Symbol_table*, Layout*, Symbol*); |
e5d5f5ed AM |
1426 | |
1427 | // Create a PLT entry for a local IFUNC symbol. | |
1428 | void | |
40b469d7 | 1429 | make_local_ifunc_plt_entry(Symbol_table*, Layout*, |
ec661b9d AM |
1430 | Sized_relobj_file<size, big_endian>*, |
1431 | unsigned int); | |
1432 | ||
42cacb20 | 1433 | |
dd93cd0a AM |
1434 | // Create a GOT entry for local dynamic __tls_get_addr. |
1435 | unsigned int | |
1436 | tlsld_got_offset(Symbol_table* symtab, Layout* layout, | |
1437 | Sized_relobj_file<size, big_endian>* object); | |
1438 | ||
42cacb20 | 1439 | unsigned int |
dd93cd0a AM |
1440 | tlsld_got_offset() const |
1441 | { | |
1442 | return this->tlsld_got_offset_; | |
1443 | } | |
42cacb20 | 1444 | |
42cacb20 DE |
1445 | // Get the dynamic reloc section, creating it if necessary. |
1446 | Reloc_section* | |
1447 | rela_dyn_section(Layout*); | |
1448 | ||
b3ccdeb5 AM |
1449 | // Similarly, but for ifunc symbols get the one for ifunc. |
1450 | Reloc_section* | |
1451 | rela_dyn_section(Symbol_table*, Layout*, bool for_ifunc); | |
1452 | ||
42cacb20 DE |
1453 | // Copy a relocation against a global symbol. |
1454 | void | |
ef9beddf | 1455 | copy_reloc(Symbol_table* symtab, Layout* layout, |
2e702c99 | 1456 | Sized_relobj_file<size, big_endian>* object, |
42cacb20 DE |
1457 | unsigned int shndx, Output_section* output_section, |
1458 | Symbol* sym, const elfcpp::Rela<size, big_endian>& reloc) | |
1459 | { | |
859d7987 | 1460 | unsigned int r_type = elfcpp::elf_r_type<size>(reloc.get_r_info()); |
42cacb20 DE |
1461 | this->copy_relocs_.copy_reloc(symtab, layout, |
1462 | symtab->get_sized_symbol<size>(sym), | |
1463 | object, shndx, output_section, | |
859d7987 CC |
1464 | r_type, reloc.get_r_offset(), |
1465 | reloc.get_r_addend(), | |
1466 | this->rela_dyn_section(layout)); | |
42cacb20 DE |
1467 | } |
1468 | ||
0cfdc767 | 1469 | // Look over all the input sections, deciding where to place stubs. |
ec661b9d | 1470 | void |
a3e60ddb | 1471 | group_sections(Layout*, const Task*, bool); |
ec661b9d AM |
1472 | |
1473 | // Sort output sections by address. | |
1474 | struct Sort_sections | |
1475 | { | |
1476 | bool | |
1477 | operator()(const Output_section* sec1, const Output_section* sec2) | |
1478 | { return sec1->address() < sec2->address(); } | |
1479 | }; | |
1480 | ||
1481 | class Branch_info | |
1482 | { | |
1483 | public: | |
1484 | Branch_info(Powerpc_relobj<size, big_endian>* ppc_object, | |
1485 | unsigned int data_shndx, | |
1486 | Address r_offset, | |
1487 | unsigned int r_type, | |
1488 | unsigned int r_sym, | |
1489 | Address addend) | |
1490 | : object_(ppc_object), shndx_(data_shndx), offset_(r_offset), | |
7e57d19e | 1491 | r_type_(r_type), tocsave_ (0), r_sym_(r_sym), addend_(addend) |
ec661b9d AM |
1492 | { } |
1493 | ||
1494 | ~Branch_info() | |
1495 | { } | |
1496 | ||
7e57d19e AM |
1497 | // Return whether this branch is going via a plt call stub, and if |
1498 | // so, mark it as having an R_PPC64_TOCSAVE. | |
1499 | bool | |
1500 | mark_pltcall(Powerpc_relobj<size, big_endian>* ppc_object, | |
1501 | unsigned int shndx, Address offset, | |
1502 | Target_powerpc* target, Symbol_table* symtab); | |
1503 | ||
ec661b9d | 1504 | // If this branch needs a plt call stub, or a long branch stub, make one. |
a3e60ddb | 1505 | bool |
ec661b9d AM |
1506 | make_stub(Stub_table<size, big_endian>*, |
1507 | Stub_table<size, big_endian>*, | |
1508 | Symbol_table*) const; | |
1509 | ||
1510 | private: | |
1511 | // The branch location.. | |
1512 | Powerpc_relobj<size, big_endian>* object_; | |
1513 | unsigned int shndx_; | |
1514 | Address offset_; | |
1515 | // ..and the branch type and destination. | |
7e57d19e AM |
1516 | unsigned int r_type_ : 31; |
1517 | unsigned int tocsave_ : 1; | |
ec661b9d AM |
1518 | unsigned int r_sym_; |
1519 | Address addend_; | |
1520 | }; | |
1521 | ||
42cacb20 DE |
1522 | // Information about this specific target which we pass to the |
1523 | // general Target structure. | |
1524 | static Target::Target_info powerpc_info; | |
1525 | ||
1526 | // The types of GOT entries needed for this platform. | |
0e70b911 CC |
1527 | // These values are exposed to the ABI in an incremental link. |
1528 | // Do not renumber existing values without changing the version | |
1529 | // number of the .gnu_incremental_inputs section. | |
42cacb20 DE |
1530 | enum Got_type |
1531 | { | |
dd93cd0a AM |
1532 | GOT_TYPE_STANDARD, |
1533 | GOT_TYPE_TLSGD, // double entry for @got@tlsgd | |
1534 | GOT_TYPE_DTPREL, // entry for @got@dtprel | |
1535 | GOT_TYPE_TPREL // entry for @got@tprel | |
42cacb20 DE |
1536 | }; |
1537 | ||
ec661b9d | 1538 | // The GOT section. |
cf43a2fe | 1539 | Output_data_got_powerpc<size, big_endian>* got_; |
b3ccdeb5 AM |
1540 | // The PLT section. This is a container for a table of addresses, |
1541 | // and their relocations. Each address in the PLT has a dynamic | |
1542 | // relocation (R_*_JMP_SLOT) and each address will have a | |
1543 | // corresponding entry in .glink for lazy resolution of the PLT. | |
1544 | // ppc32 initialises the PLT to point at the .glink entry, while | |
1545 | // ppc64 leaves this to ld.so. To make a call via the PLT, the | |
1546 | // linker adds a stub that loads the PLT entry into ctr then | |
1547 | // branches to ctr. There may be more than one stub for each PLT | |
1548 | // entry. DT_JMPREL points at the first PLT dynamic relocation and | |
1549 | // DT_PLTRELSZ gives the total size of PLT dynamic relocations. | |
42cacb20 | 1550 | Output_data_plt_powerpc<size, big_endian>* plt_; |
b3ccdeb5 AM |
1551 | // The IPLT section. Like plt_, this is a container for a table of |
1552 | // addresses and their relocations, specifically for STT_GNU_IFUNC | |
1553 | // functions that resolve locally (STT_GNU_IFUNC functions that | |
1554 | // don't resolve locally go in PLT). Unlike plt_, these have no | |
1555 | // entry in .glink for lazy resolution, and the relocation section | |
1556 | // does not have a 1-1 correspondence with IPLT addresses. In fact, | |
1557 | // the relocation section may contain relocations against | |
1558 | // STT_GNU_IFUNC symbols at locations outside of IPLT. The | |
1559 | // relocation section will appear at the end of other dynamic | |
1560 | // relocations, so that ld.so applies these relocations after other | |
1561 | // dynamic relocations. In a static executable, the relocation | |
1562 | // section is emitted and marked with __rela_iplt_start and | |
1563 | // __rela_iplt_end symbols. | |
e5d5f5ed | 1564 | Output_data_plt_powerpc<size, big_endian>* iplt_; |
ec661b9d AM |
1565 | // Section holding long branch destinations. |
1566 | Output_data_brlt_powerpc<size, big_endian>* brlt_section_; | |
1567 | // The .glink section. | |
cf43a2fe | 1568 | Output_data_glink<size, big_endian>* glink_; |
ec661b9d | 1569 | // The dynamic reloc section. |
42cacb20 DE |
1570 | Reloc_section* rela_dyn_; |
1571 | // Relocs saved to avoid a COPY reloc. | |
5edad15d | 1572 | Powerpc_copy_relocs<elfcpp::SHT_RELA, size, big_endian> copy_relocs_; |
dd93cd0a AM |
1573 | // Offset of the GOT entry for local dynamic __tls_get_addr calls. |
1574 | unsigned int tlsld_got_offset_; | |
ec661b9d AM |
1575 | |
1576 | Stub_tables stub_tables_; | |
1577 | typedef Unordered_map<Address, unsigned int> Branch_lookup_table; | |
1578 | Branch_lookup_table branch_lookup_table_; | |
1579 | ||
1580 | typedef std::vector<Branch_info> Branches; | |
1581 | Branches branch_info_; | |
7e57d19e | 1582 | Tocsave_loc tocsave_loc_; |
9e69ed50 AM |
1583 | |
1584 | bool plt_thread_safe_; | |
7ee7ff70 AM |
1585 | bool plt_localentry0_; |
1586 | bool plt_localentry0_init_; | |
1587 | bool has_localentry0_; | |
34e0882b | 1588 | bool has_tls_get_addr_opt_; |
a3e60ddb AM |
1589 | |
1590 | bool relax_failed_; | |
1591 | int relax_fail_count_; | |
1592 | int32_t stub_group_size_; | |
d49044c7 AM |
1593 | |
1594 | Output_data_save_res<size, big_endian> *savres_section_; | |
34e0882b AM |
1595 | |
1596 | // The "__tls_get_addr" symbol, if present | |
1597 | Symbol* tls_get_addr_; | |
1598 | // If optimizing __tls_get_addr calls, the "__tls_get_addr_opt" symbol. | |
1599 | Symbol* tls_get_addr_opt_; | |
42cacb20 DE |
1600 | }; |
1601 | ||
1602 | template<> | |
1603 | Target::Target_info Target_powerpc<32, true>::powerpc_info = | |
1604 | { | |
1605 | 32, // size | |
1606 | true, // is_big_endian | |
1607 | elfcpp::EM_PPC, // machine_code | |
1608 | false, // has_make_symbol | |
1609 | false, // has_resolve | |
1610 | false, // has_code_fill | |
1611 | true, // is_default_stack_executable | |
b3ce541e | 1612 | false, // can_icf_inline_merge_sections |
42cacb20 DE |
1613 | '\0', // wrap_char |
1614 | "/usr/lib/ld.so.1", // dynamic_linker | |
1615 | 0x10000000, // default_text_segment_address | |
1616 | 64 * 1024, // abi_pagesize (overridable by -z max-page-size) | |
8a5e3e08 | 1617 | 4 * 1024, // common_pagesize (overridable by -z common-page-size) |
c9269dff AM |
1618 | false, // isolate_execinstr |
1619 | 0, // rosegment_gap | |
8a5e3e08 ILT |
1620 | elfcpp::SHN_UNDEF, // small_common_shndx |
1621 | elfcpp::SHN_UNDEF, // large_common_shndx | |
1622 | 0, // small_common_section_flags | |
05a352e6 DK |
1623 | 0, // large_common_section_flags |
1624 | NULL, // attributes_section | |
a67858e0 | 1625 | NULL, // attributes_vendor |
8d9743bd MK |
1626 | "_start", // entry_symbol_name |
1627 | 32, // hash_entry_size | |
bce5a025 | 1628 | elfcpp::SHT_PROGBITS, // unwind_section_type |
42cacb20 DE |
1629 | }; |
1630 | ||
1631 | template<> | |
1632 | Target::Target_info Target_powerpc<32, false>::powerpc_info = | |
1633 | { | |
1634 | 32, // size | |
1635 | false, // is_big_endian | |
1636 | elfcpp::EM_PPC, // machine_code | |
1637 | false, // has_make_symbol | |
1638 | false, // has_resolve | |
1639 | false, // has_code_fill | |
1640 | true, // is_default_stack_executable | |
b3ce541e | 1641 | false, // can_icf_inline_merge_sections |
42cacb20 DE |
1642 | '\0', // wrap_char |
1643 | "/usr/lib/ld.so.1", // dynamic_linker | |
1644 | 0x10000000, // default_text_segment_address | |
1645 | 64 * 1024, // abi_pagesize (overridable by -z max-page-size) | |
8a5e3e08 | 1646 | 4 * 1024, // common_pagesize (overridable by -z common-page-size) |
c9269dff AM |
1647 | false, // isolate_execinstr |
1648 | 0, // rosegment_gap | |
8a5e3e08 ILT |
1649 | elfcpp::SHN_UNDEF, // small_common_shndx |
1650 | elfcpp::SHN_UNDEF, // large_common_shndx | |
1651 | 0, // small_common_section_flags | |
05a352e6 DK |
1652 | 0, // large_common_section_flags |
1653 | NULL, // attributes_section | |
a67858e0 | 1654 | NULL, // attributes_vendor |
8d9743bd MK |
1655 | "_start", // entry_symbol_name |
1656 | 32, // hash_entry_size | |
bce5a025 | 1657 | elfcpp::SHT_PROGBITS, // unwind_section_type |
42cacb20 DE |
1658 | }; |
1659 | ||
1660 | template<> | |
1661 | Target::Target_info Target_powerpc<64, true>::powerpc_info = | |
1662 | { | |
1663 | 64, // size | |
1664 | true, // is_big_endian | |
1665 | elfcpp::EM_PPC64, // machine_code | |
1666 | false, // has_make_symbol | |
565ed01a | 1667 | true, // has_resolve |
42cacb20 | 1668 | false, // has_code_fill |
ec769010 | 1669 | false, // is_default_stack_executable |
b3ce541e | 1670 | false, // can_icf_inline_merge_sections |
42cacb20 DE |
1671 | '\0', // wrap_char |
1672 | "/usr/lib/ld.so.1", // dynamic_linker | |
1673 | 0x10000000, // default_text_segment_address | |
1674 | 64 * 1024, // abi_pagesize (overridable by -z max-page-size) | |
dd93cd0a | 1675 | 4 * 1024, // common_pagesize (overridable by -z common-page-size) |
c9269dff AM |
1676 | false, // isolate_execinstr |
1677 | 0, // rosegment_gap | |
8a5e3e08 ILT |
1678 | elfcpp::SHN_UNDEF, // small_common_shndx |
1679 | elfcpp::SHN_UNDEF, // large_common_shndx | |
1680 | 0, // small_common_section_flags | |
05a352e6 DK |
1681 | 0, // large_common_section_flags |
1682 | NULL, // attributes_section | |
a67858e0 | 1683 | NULL, // attributes_vendor |
8d9743bd MK |
1684 | "_start", // entry_symbol_name |
1685 | 32, // hash_entry_size | |
bce5a025 | 1686 | elfcpp::SHT_PROGBITS, // unwind_section_type |
42cacb20 DE |
1687 | }; |
1688 | ||
1689 | template<> | |
1690 | Target::Target_info Target_powerpc<64, false>::powerpc_info = | |
1691 | { | |
1692 | 64, // size | |
1693 | false, // is_big_endian | |
1694 | elfcpp::EM_PPC64, // machine_code | |
1695 | false, // has_make_symbol | |
565ed01a | 1696 | true, // has_resolve |
42cacb20 | 1697 | false, // has_code_fill |
ec769010 | 1698 | false, // is_default_stack_executable |
b3ce541e | 1699 | false, // can_icf_inline_merge_sections |
42cacb20 DE |
1700 | '\0', // wrap_char |
1701 | "/usr/lib/ld.so.1", // dynamic_linker | |
1702 | 0x10000000, // default_text_segment_address | |
1703 | 64 * 1024, // abi_pagesize (overridable by -z max-page-size) | |
dd93cd0a | 1704 | 4 * 1024, // common_pagesize (overridable by -z common-page-size) |
c9269dff AM |
1705 | false, // isolate_execinstr |
1706 | 0, // rosegment_gap | |
8a5e3e08 ILT |
1707 | elfcpp::SHN_UNDEF, // small_common_shndx |
1708 | elfcpp::SHN_UNDEF, // large_common_shndx | |
1709 | 0, // small_common_section_flags | |
05a352e6 DK |
1710 | 0, // large_common_section_flags |
1711 | NULL, // attributes_section | |
a67858e0 | 1712 | NULL, // attributes_vendor |
8d9743bd MK |
1713 | "_start", // entry_symbol_name |
1714 | 32, // hash_entry_size | |
bce5a025 | 1715 | elfcpp::SHT_PROGBITS, // unwind_section_type |
42cacb20 DE |
1716 | }; |
1717 | ||
dd93cd0a AM |
1718 | inline bool |
1719 | is_branch_reloc(unsigned int r_type) | |
1720 | { | |
1721 | return (r_type == elfcpp::R_POWERPC_REL24 | |
1722 | || r_type == elfcpp::R_PPC_PLTREL24 | |
1723 | || r_type == elfcpp::R_PPC_LOCAL24PC | |
1724 | || r_type == elfcpp::R_POWERPC_REL14 | |
1725 | || r_type == elfcpp::R_POWERPC_REL14_BRTAKEN | |
1726 | || r_type == elfcpp::R_POWERPC_REL14_BRNTAKEN | |
1727 | || r_type == elfcpp::R_POWERPC_ADDR24 | |
1728 | || r_type == elfcpp::R_POWERPC_ADDR14 | |
1729 | || r_type == elfcpp::R_POWERPC_ADDR14_BRTAKEN | |
1730 | || r_type == elfcpp::R_POWERPC_ADDR14_BRNTAKEN); | |
1731 | } | |
1732 | ||
1733 | // If INSN is an opcode that may be used with an @tls operand, return | |
1734 | // the transformed insn for TLS optimisation, otherwise return 0. If | |
1735 | // REG is non-zero only match an insn with RB or RA equal to REG. | |
1736 | uint32_t | |
1737 | at_tls_transform(uint32_t insn, unsigned int reg) | |
1738 | { | |
1739 | if ((insn & (0x3f << 26)) != 31 << 26) | |
1740 | return 0; | |
1741 | ||
1742 | unsigned int rtra; | |
1743 | if (reg == 0 || ((insn >> 11) & 0x1f) == reg) | |
1744 | rtra = insn & ((1 << 26) - (1 << 16)); | |
1745 | else if (((insn >> 16) & 0x1f) == reg) | |
1746 | rtra = (insn & (0x1f << 21)) | ((insn & (0x1f << 11)) << 5); | |
1747 | else | |
1748 | return 0; | |
1749 | ||
1750 | if ((insn & (0x3ff << 1)) == 266 << 1) | |
1751 | // add -> addi | |
1752 | insn = 14 << 26; | |
1753 | else if ((insn & (0x1f << 1)) == 23 << 1 | |
1754 | && ((insn & (0x1f << 6)) < 14 << 6 | |
1755 | || ((insn & (0x1f << 6)) >= 16 << 6 | |
1756 | && (insn & (0x1f << 6)) < 24 << 6))) | |
1757 | // load and store indexed -> dform | |
1758 | insn = (32 | ((insn >> 6) & 0x1f)) << 26; | |
1759 | else if ((insn & (((0x1a << 5) | 0x1f) << 1)) == 21 << 1) | |
1760 | // ldx, ldux, stdx, stdux -> ld, ldu, std, stdu | |
1761 | insn = ((58 | ((insn >> 6) & 4)) << 26) | ((insn >> 6) & 1); | |
1762 | else if ((insn & (((0x1f << 5) | 0x1f) << 1)) == 341 << 1) | |
1763 | // lwax -> lwa | |
1764 | insn = (58 << 26) | 2; | |
1765 | else | |
1766 | return 0; | |
1767 | insn |= rtra; | |
1768 | return insn; | |
1769 | } | |
1770 | ||
dd93cd0a | 1771 | |
42cacb20 DE |
1772 | template<int size, bool big_endian> |
1773 | class Powerpc_relocate_functions | |
1774 | { | |
dd93cd0a | 1775 | public: |
f4baf0d4 | 1776 | enum Overflow_check |
dd93cd0a | 1777 | { |
f4baf0d4 AM |
1778 | CHECK_NONE, |
1779 | CHECK_SIGNED, | |
b80eed39 AM |
1780 | CHECK_UNSIGNED, |
1781 | CHECK_BITFIELD, | |
1782 | CHECK_LOW_INSN, | |
1783 | CHECK_HIGH_INSN | |
dd93cd0a AM |
1784 | }; |
1785 | ||
f4baf0d4 | 1786 | enum Status |
dd93cd0a | 1787 | { |
f4baf0d4 AM |
1788 | STATUS_OK, |
1789 | STATUS_OVERFLOW | |
1790 | }; | |
dd93cd0a | 1791 | |
42cacb20 | 1792 | private: |
c9269dff | 1793 | typedef Powerpc_relocate_functions<size, big_endian> This; |
c9269dff | 1794 | typedef typename elfcpp::Elf_types<size>::Elf_Addr Address; |
a680de9a | 1795 | typedef typename elfcpp::Elf_types<size>::Elf_Swxword SignedAddress; |
c9269dff | 1796 | |
dd93cd0a AM |
1797 | template<int valsize> |
1798 | static inline bool | |
1799 | has_overflow_signed(Address value) | |
1800 | { | |
1801 | // limit = 1 << (valsize - 1) without shift count exceeding size of type | |
1802 | Address limit = static_cast<Address>(1) << ((valsize - 1) >> 1); | |
1803 | limit <<= ((valsize - 1) >> 1); | |
1804 | limit <<= ((valsize - 1) - 2 * ((valsize - 1) >> 1)); | |
1805 | return value + limit > (limit << 1) - 1; | |
1806 | } | |
1807 | ||
1808 | template<int valsize> | |
1809 | static inline bool | |
b80eed39 | 1810 | has_overflow_unsigned(Address value) |
dd93cd0a AM |
1811 | { |
1812 | Address limit = static_cast<Address>(1) << ((valsize - 1) >> 1); | |
1813 | limit <<= ((valsize - 1) >> 1); | |
1814 | limit <<= ((valsize - 1) - 2 * ((valsize - 1) >> 1)); | |
b80eed39 AM |
1815 | return value > (limit << 1) - 1; |
1816 | } | |
1817 | ||
1818 | template<int valsize> | |
1819 | static inline bool | |
1820 | has_overflow_bitfield(Address value) | |
1821 | { | |
1822 | return (has_overflow_unsigned<valsize>(value) | |
1823 | && has_overflow_signed<valsize>(value)); | |
dd93cd0a AM |
1824 | } |
1825 | ||
1826 | template<int valsize> | |
f4baf0d4 AM |
1827 | static inline Status |
1828 | overflowed(Address value, Overflow_check overflow) | |
dd93cd0a | 1829 | { |
f4baf0d4 | 1830 | if (overflow == CHECK_SIGNED) |
dd93cd0a AM |
1831 | { |
1832 | if (has_overflow_signed<valsize>(value)) | |
f4baf0d4 | 1833 | return STATUS_OVERFLOW; |
dd93cd0a | 1834 | } |
b80eed39 AM |
1835 | else if (overflow == CHECK_UNSIGNED) |
1836 | { | |
1837 | if (has_overflow_unsigned<valsize>(value)) | |
1838 | return STATUS_OVERFLOW; | |
1839 | } | |
f4baf0d4 | 1840 | else if (overflow == CHECK_BITFIELD) |
dd93cd0a AM |
1841 | { |
1842 | if (has_overflow_bitfield<valsize>(value)) | |
f4baf0d4 | 1843 | return STATUS_OVERFLOW; |
dd93cd0a | 1844 | } |
f4baf0d4 | 1845 | return STATUS_OK; |
dd93cd0a AM |
1846 | } |
1847 | ||
cf43a2fe | 1848 | // Do a simple RELA relocation |
0cfb0717 | 1849 | template<int fieldsize, int valsize> |
f4baf0d4 AM |
1850 | static inline Status |
1851 | rela(unsigned char* view, Address value, Overflow_check overflow) | |
dd93cd0a | 1852 | { |
0cfb0717 | 1853 | typedef typename elfcpp::Swap<fieldsize, big_endian>::Valtype Valtype; |
dd93cd0a | 1854 | Valtype* wv = reinterpret_cast<Valtype*>(view); |
0cfb0717 | 1855 | elfcpp::Swap<fieldsize, big_endian>::writeval(wv, value); |
dd93cd0a AM |
1856 | return overflowed<valsize>(value, overflow); |
1857 | } | |
1858 | ||
0cfb0717 | 1859 | template<int fieldsize, int valsize> |
f4baf0d4 | 1860 | static inline Status |
42cacb20 DE |
1861 | rela(unsigned char* view, |
1862 | unsigned int right_shift, | |
0cfb0717 | 1863 | typename elfcpp::Valtype_base<fieldsize>::Valtype dst_mask, |
c9269dff | 1864 | Address value, |
f4baf0d4 | 1865 | Overflow_check overflow) |
42cacb20 | 1866 | { |
0cfb0717 | 1867 | typedef typename elfcpp::Swap<fieldsize, big_endian>::Valtype Valtype; |
42cacb20 | 1868 | Valtype* wv = reinterpret_cast<Valtype*>(view); |
0cfb0717 | 1869 | Valtype val = elfcpp::Swap<fieldsize, big_endian>::readval(wv); |
dd93cd0a | 1870 | Valtype reloc = value >> right_shift; |
42cacb20 DE |
1871 | val &= ~dst_mask; |
1872 | reloc &= dst_mask; | |
0cfb0717 | 1873 | elfcpp::Swap<fieldsize, big_endian>::writeval(wv, val | reloc); |
dd93cd0a | 1874 | return overflowed<valsize>(value >> right_shift, overflow); |
42cacb20 DE |
1875 | } |
1876 | ||
cf43a2fe | 1877 | // Do a simple RELA relocation, unaligned. |
0cfb0717 | 1878 | template<int fieldsize, int valsize> |
f4baf0d4 AM |
1879 | static inline Status |
1880 | rela_ua(unsigned char* view, Address value, Overflow_check overflow) | |
dd93cd0a | 1881 | { |
0cfb0717 | 1882 | elfcpp::Swap_unaligned<fieldsize, big_endian>::writeval(view, value); |
dd93cd0a AM |
1883 | return overflowed<valsize>(value, overflow); |
1884 | } | |
1885 | ||
0cfb0717 | 1886 | template<int fieldsize, int valsize> |
f4baf0d4 | 1887 | static inline Status |
cf43a2fe AM |
1888 | rela_ua(unsigned char* view, |
1889 | unsigned int right_shift, | |
0cfb0717 | 1890 | typename elfcpp::Valtype_base<fieldsize>::Valtype dst_mask, |
c9269dff | 1891 | Address value, |
f4baf0d4 | 1892 | Overflow_check overflow) |
42cacb20 | 1893 | { |
0cfb0717 | 1894 | typedef typename elfcpp::Swap_unaligned<fieldsize, big_endian>::Valtype |
c9269dff | 1895 | Valtype; |
0cfb0717 | 1896 | Valtype val = elfcpp::Swap<fieldsize, big_endian>::readval(view); |
dd93cd0a | 1897 | Valtype reloc = value >> right_shift; |
42cacb20 DE |
1898 | val &= ~dst_mask; |
1899 | reloc &= dst_mask; | |
0cfb0717 | 1900 | elfcpp::Swap_unaligned<fieldsize, big_endian>::writeval(view, val | reloc); |
dd93cd0a | 1901 | return overflowed<valsize>(value >> right_shift, overflow); |
42cacb20 DE |
1902 | } |
1903 | ||
42cacb20 | 1904 | public: |
dd93cd0a | 1905 | // R_PPC64_ADDR64: (Symbol + Addend) |
42cacb20 | 1906 | static inline void |
dd93cd0a | 1907 | addr64(unsigned char* view, Address value) |
0cfb0717 | 1908 | { This::template rela<64,64>(view, value, CHECK_NONE); } |
42cacb20 | 1909 | |
dd93cd0a | 1910 | // R_PPC64_UADDR64: (Symbol + Addend) unaligned |
42cacb20 | 1911 | static inline void |
dd93cd0a | 1912 | addr64_u(unsigned char* view, Address value) |
0cfb0717 | 1913 | { This::template rela_ua<64,64>(view, value, CHECK_NONE); } |
dd93cd0a AM |
1914 | |
1915 | // R_POWERPC_ADDR32: (Symbol + Addend) | |
f4baf0d4 AM |
1916 | static inline Status |
1917 | addr32(unsigned char* view, Address value, Overflow_check overflow) | |
0cfb0717 | 1918 | { return This::template rela<32,32>(view, value, overflow); } |
dd93cd0a AM |
1919 | |
1920 | // R_POWERPC_UADDR32: (Symbol + Addend) unaligned | |
f4baf0d4 AM |
1921 | static inline Status |
1922 | addr32_u(unsigned char* view, Address value, Overflow_check overflow) | |
0cfb0717 | 1923 | { return This::template rela_ua<32,32>(view, value, overflow); } |
dd93cd0a AM |
1924 | |
1925 | // R_POWERPC_ADDR24: (Symbol + Addend) & 0x3fffffc | |
f4baf0d4 AM |
1926 | static inline Status |
1927 | addr24(unsigned char* view, Address value, Overflow_check overflow) | |
dd93cd0a | 1928 | { |
0cfb0717 AM |
1929 | Status stat = This::template rela<32,26>(view, 0, 0x03fffffc, |
1930 | value, overflow); | |
f4baf0d4 AM |
1931 | if (overflow != CHECK_NONE && (value & 3) != 0) |
1932 | stat = STATUS_OVERFLOW; | |
dd93cd0a AM |
1933 | return stat; |
1934 | } | |
42cacb20 DE |
1935 | |
1936 | // R_POWERPC_ADDR16: (Symbol + Addend) & 0xffff | |
f4baf0d4 AM |
1937 | static inline Status |
1938 | addr16(unsigned char* view, Address value, Overflow_check overflow) | |
0cfb0717 | 1939 | { return This::template rela<16,16>(view, value, overflow); } |
42cacb20 | 1940 | |
dd93cd0a | 1941 | // R_POWERPC_ADDR16: (Symbol + Addend) & 0xffff, unaligned |
f4baf0d4 AM |
1942 | static inline Status |
1943 | addr16_u(unsigned char* view, Address value, Overflow_check overflow) | |
0cfb0717 | 1944 | { return This::template rela_ua<16,16>(view, value, overflow); } |
42cacb20 | 1945 | |
dd93cd0a | 1946 | // R_POWERPC_ADDR16_DS: (Symbol + Addend) & 0xfffc |
f4baf0d4 AM |
1947 | static inline Status |
1948 | addr16_ds(unsigned char* view, Address value, Overflow_check overflow) | |
dd93cd0a | 1949 | { |
0cfb0717 | 1950 | Status stat = This::template rela<16,16>(view, 0, 0xfffc, value, overflow); |
ec86f434 | 1951 | if ((value & 3) != 0) |
f4baf0d4 | 1952 | stat = STATUS_OVERFLOW; |
dd93cd0a AM |
1953 | return stat; |
1954 | } | |
42cacb20 | 1955 | |
a680de9a PB |
1956 | // R_POWERPC_ADDR16_DQ: (Symbol + Addend) & 0xfff0 |
1957 | static inline Status | |
1958 | addr16_dq(unsigned char* view, Address value, Overflow_check overflow) | |
1959 | { | |
1960 | Status stat = This::template rela<16,16>(view, 0, 0xfff0, value, overflow); | |
1961 | if ((value & 15) != 0) | |
1962 | stat = STATUS_OVERFLOW; | |
1963 | return stat; | |
1964 | } | |
1965 | ||
42cacb20 DE |
1966 | // R_POWERPC_ADDR16_HI: ((Symbol + Addend) >> 16) & 0xffff |
1967 | static inline void | |
dd93cd0a | 1968 | addr16_hi(unsigned char* view, Address value) |
0cfb0717 | 1969 | { This::template rela<16,16>(view, 16, 0xffff, value, CHECK_NONE); } |
42cacb20 | 1970 | |
c9269dff | 1971 | // R_POWERPC_ADDR16_HA: ((Symbol + Addend + 0x8000) >> 16) & 0xffff |
42cacb20 | 1972 | static inline void |
dd93cd0a AM |
1973 | addr16_ha(unsigned char* view, Address value) |
1974 | { This::addr16_hi(view, value + 0x8000); } | |
42cacb20 | 1975 | |
dd93cd0a | 1976 | // R_POWERPC_ADDR16_HIGHER: ((Symbol + Addend) >> 32) & 0xffff |
42cacb20 | 1977 | static inline void |
dd93cd0a | 1978 | addr16_hi2(unsigned char* view, Address value) |
0cfb0717 | 1979 | { This::template rela<16,16>(view, 32, 0xffff, value, CHECK_NONE); } |
42cacb20 | 1980 | |
dd93cd0a | 1981 | // R_POWERPC_ADDR16_HIGHERA: ((Symbol + Addend + 0x8000) >> 32) & 0xffff |
42cacb20 | 1982 | static inline void |
dd93cd0a AM |
1983 | addr16_ha2(unsigned char* view, Address value) |
1984 | { This::addr16_hi2(view, value + 0x8000); } | |
42cacb20 | 1985 | |
dd93cd0a | 1986 | // R_POWERPC_ADDR16_HIGHEST: ((Symbol + Addend) >> 48) & 0xffff |
42cacb20 | 1987 | static inline void |
dd93cd0a | 1988 | addr16_hi3(unsigned char* view, Address value) |
0cfb0717 | 1989 | { This::template rela<16,16>(view, 48, 0xffff, value, CHECK_NONE); } |
42cacb20 | 1990 | |
dd93cd0a | 1991 | // R_POWERPC_ADDR16_HIGHESTA: ((Symbol + Addend + 0x8000) >> 48) & 0xffff |
42cacb20 | 1992 | static inline void |
dd93cd0a AM |
1993 | addr16_ha3(unsigned char* view, Address value) |
1994 | { This::addr16_hi3(view, value + 0x8000); } | |
1995 | ||
1996 | // R_POWERPC_ADDR14: (Symbol + Addend) & 0xfffc | |
f4baf0d4 AM |
1997 | static inline Status |
1998 | addr14(unsigned char* view, Address value, Overflow_check overflow) | |
dd93cd0a | 1999 | { |
0cfb0717 | 2000 | Status stat = This::template rela<32,16>(view, 0, 0xfffc, value, overflow); |
f4baf0d4 AM |
2001 | if (overflow != CHECK_NONE && (value & 3) != 0) |
2002 | stat = STATUS_OVERFLOW; | |
dd93cd0a AM |
2003 | return stat; |
2004 | } | |
a680de9a PB |
2005 | |
2006 | // R_POWERPC_REL16DX_HA | |
2007 | static inline Status | |
2008 | addr16dx_ha(unsigned char *view, Address value, Overflow_check overflow) | |
2009 | { | |
2010 | typedef typename elfcpp::Swap<32, big_endian>::Valtype Valtype; | |
2011 | Valtype* wv = reinterpret_cast<Valtype*>(view); | |
2012 | Valtype val = elfcpp::Swap<32, big_endian>::readval(wv); | |
2013 | value += 0x8000; | |
2014 | value = static_cast<SignedAddress>(value) >> 16; | |
2015 | val |= (value & 0xffc1) | ((value & 0x3e) << 15); | |
2016 | elfcpp::Swap<32, big_endian>::writeval(wv, val); | |
2017 | return overflowed<16>(value, overflow); | |
2018 | } | |
cf43a2fe AM |
2019 | }; |
2020 | ||
b4f7960d AM |
2021 | // Set ABI version for input and output. |
2022 | ||
2023 | template<int size, bool big_endian> | |
2024 | void | |
2025 | Powerpc_relobj<size, big_endian>::set_abiversion(int ver) | |
2026 | { | |
2027 | this->e_flags_ |= ver; | |
2028 | if (this->abiversion() != 0) | |
2029 | { | |
2030 | Target_powerpc<size, big_endian>* target = | |
2031 | static_cast<Target_powerpc<size, big_endian>*>( | |
2032 | parameters->sized_target<size, big_endian>()); | |
2033 | if (target->abiversion() == 0) | |
2034 | target->set_abiversion(this->abiversion()); | |
2035 | else if (target->abiversion() != this->abiversion()) | |
2036 | gold_error(_("%s: ABI version %d is not compatible " | |
2037 | "with ABI version %d output"), | |
2038 | this->name().c_str(), | |
2039 | this->abiversion(), target->abiversion()); | |
2040 | ||
2041 | } | |
2042 | } | |
2043 | ||
5edad15d AM |
2044 | // Stash away the index of .got2, .opd, .rela.toc, and .toc in a |
2045 | // relocatable object, if such sections exists. | |
cf43a2fe AM |
2046 | |
2047 | template<int size, bool big_endian> | |
2048 | bool | |
2049 | Powerpc_relobj<size, big_endian>::do_find_special_sections( | |
2050 | Read_symbols_data* sd) | |
2051 | { | |
c9269dff AM |
2052 | const unsigned char* const pshdrs = sd->section_headers->data(); |
2053 | const unsigned char* namesu = sd->section_names->data(); | |
2054 | const char* names = reinterpret_cast<const char*>(namesu); | |
2055 | section_size_type names_size = sd->section_names_size; | |
2056 | const unsigned char* s; | |
2057 | ||
dc3714f3 AM |
2058 | s = this->template find_shdr<size, big_endian>(pshdrs, |
2059 | size == 32 ? ".got2" : ".opd", | |
2060 | names, names_size, NULL); | |
c9269dff AM |
2061 | if (s != NULL) |
2062 | { | |
2063 | unsigned int ndx = (s - pshdrs) / elfcpp::Elf_sizes<size>::shdr_size; | |
2064 | this->special_ = ndx; | |
b4f7960d AM |
2065 | if (size == 64) |
2066 | { | |
2067 | if (this->abiversion() == 0) | |
2068 | this->set_abiversion(1); | |
2069 | else if (this->abiversion() > 1) | |
2070 | gold_error(_("%s: .opd invalid in abiv%d"), | |
2071 | this->name().c_str(), this->abiversion()); | |
2072 | } | |
c9269dff | 2073 | } |
5edad15d AM |
2074 | if (size == 64) |
2075 | { | |
2076 | s = this->template find_shdr<size, big_endian>(pshdrs, ".rela.toc", | |
2077 | names, names_size, NULL); | |
2078 | if (s != NULL) | |
2079 | { | |
2080 | unsigned int ndx = (s - pshdrs) / elfcpp::Elf_sizes<size>::shdr_size; | |
2081 | this->relatoc_ = ndx; | |
2082 | typename elfcpp::Shdr<size, big_endian> shdr(s); | |
2083 | this->toc_ = this->adjust_shndx(shdr.get_sh_info()); | |
2084 | } | |
2085 | } | |
c9269dff AM |
2086 | return Sized_relobj_file<size, big_endian>::do_find_special_sections(sd); |
2087 | } | |
2088 | ||
2089 | // Examine .rela.opd to build info about function entry points. | |
2090 | ||
2091 | template<int size, bool big_endian> | |
2092 | void | |
2093 | Powerpc_relobj<size, big_endian>::scan_opd_relocs( | |
2094 | size_t reloc_count, | |
2095 | const unsigned char* prelocs, | |
2096 | const unsigned char* plocal_syms) | |
2097 | { | |
2098 | if (size == 64) | |
cf43a2fe | 2099 | { |
0e123f69 AM |
2100 | typedef typename elfcpp::Rela<size, big_endian> Reltype; |
2101 | const int reloc_size = elfcpp::Elf_sizes<size>::rela_size; | |
c9269dff | 2102 | const int sym_size = elfcpp::Elf_sizes<size>::sym_size; |
ec4dbad3 AM |
2103 | Address expected_off = 0; |
2104 | bool regular = true; | |
2105 | unsigned int opd_ent_size = 0; | |
c9269dff AM |
2106 | |
2107 | for (size_t i = 0; i < reloc_count; ++i, prelocs += reloc_size) | |
cf43a2fe | 2108 | { |
c9269dff AM |
2109 | Reltype reloc(prelocs); |
2110 | typename elfcpp::Elf_types<size>::Elf_WXword r_info | |
2111 | = reloc.get_r_info(); | |
2112 | unsigned int r_type = elfcpp::elf_r_type<size>(r_info); | |
2113 | if (r_type == elfcpp::R_PPC64_ADDR64) | |
2114 | { | |
2115 | unsigned int r_sym = elfcpp::elf_r_sym<size>(r_info); | |
2116 | typename elfcpp::Elf_types<size>::Elf_Addr value; | |
2117 | bool is_ordinary; | |
2118 | unsigned int shndx; | |
2119 | if (r_sym < this->local_symbol_count()) | |
2120 | { | |
2121 | typename elfcpp::Sym<size, big_endian> | |
2122 | lsym(plocal_syms + r_sym * sym_size); | |
2123 | shndx = lsym.get_st_shndx(); | |
2124 | shndx = this->adjust_sym_shndx(r_sym, shndx, &is_ordinary); | |
2125 | value = lsym.get_st_value(); | |
2126 | } | |
2127 | else | |
2128 | shndx = this->symbol_section_and_value(r_sym, &value, | |
2129 | &is_ordinary); | |
2130 | this->set_opd_ent(reloc.get_r_offset(), shndx, | |
2131 | value + reloc.get_r_addend()); | |
ec4dbad3 AM |
2132 | if (i == 2) |
2133 | { | |
2134 | expected_off = reloc.get_r_offset(); | |
2135 | opd_ent_size = expected_off; | |
2136 | } | |
2137 | else if (expected_off != reloc.get_r_offset()) | |
2138 | regular = false; | |
2139 | expected_off += opd_ent_size; | |
2140 | } | |
2141 | else if (r_type == elfcpp::R_PPC64_TOC) | |
2142 | { | |
2143 | if (expected_off - opd_ent_size + 8 != reloc.get_r_offset()) | |
2144 | regular = false; | |
2145 | } | |
2146 | else | |
2147 | { | |
2148 | gold_warning(_("%s: unexpected reloc type %u in .opd section"), | |
2149 | this->name().c_str(), r_type); | |
2150 | regular = false; | |
c9269dff AM |
2151 | } |
2152 | } | |
ec4dbad3 AM |
2153 | if (reloc_count <= 2) |
2154 | opd_ent_size = this->section_size(this->opd_shndx()); | |
2155 | if (opd_ent_size != 24 && opd_ent_size != 16) | |
2156 | regular = false; | |
2157 | if (!regular) | |
2158 | { | |
2159 | gold_warning(_("%s: .opd is not a regular array of opd entries"), | |
2160 | this->name().c_str()); | |
2161 | opd_ent_size = 0; | |
2162 | } | |
c9269dff AM |
2163 | } |
2164 | } | |
2165 | ||
5edad15d AM |
2166 | // Returns true if a code sequence loading the TOC entry at VALUE |
2167 | // relative to the TOC pointer can be converted into code calculating | |
2168 | // a TOC pointer relative offset. | |
2169 | // If so, the TOC pointer relative offset is stored to VALUE. | |
2170 | ||
2171 | template<int size, bool big_endian> | |
2172 | bool | |
2173 | Powerpc_relobj<size, big_endian>::make_toc_relative( | |
2174 | Target_powerpc<size, big_endian>* target, | |
2175 | Address* value) | |
2176 | { | |
2177 | if (size != 64) | |
2178 | return false; | |
2179 | ||
e666304e AM |
2180 | // With -mcmodel=medium code it is quite possible to have |
2181 | // toc-relative relocs referring to objects outside the TOC. | |
2182 | // Don't try to look at a non-existent TOC. | |
2183 | if (this->toc_shndx() == 0) | |
2184 | return false; | |
2185 | ||
5edad15d AM |
2186 | // Convert VALUE back to an address by adding got_base (see below), |
2187 | // then to an offset in the TOC by subtracting the TOC output | |
2188 | // section address and the TOC output offset. Since this TOC output | |
2189 | // section and the got output section are one and the same, we can | |
2190 | // omit adding and subtracting the output section address. | |
2191 | Address off = (*value + this->toc_base_offset() | |
2192 | - this->output_section_offset(this->toc_shndx())); | |
2193 | // Is this offset in the TOC? -mcmodel=medium code may be using | |
2194 | // TOC relative access to variables outside the TOC. Those of | |
2195 | // course can't be optimized. We also don't try to optimize code | |
2196 | // that is using a different object's TOC. | |
2197 | if (off >= this->section_size(this->toc_shndx())) | |
2198 | return false; | |
2199 | ||
2200 | if (this->no_toc_opt(off)) | |
2201 | return false; | |
2202 | ||
2203 | section_size_type vlen; | |
2204 | unsigned char* view = this->get_output_view(this->toc_shndx(), &vlen); | |
2205 | Address addr = elfcpp::Swap<size, big_endian>::readval(view + off); | |
2206 | // The TOC pointer | |
2207 | Address got_base = (target->got_section()->output_section()->address() | |
2208 | + this->toc_base_offset()); | |
2209 | addr -= got_base; | |
857e829e | 2210 | if (addr + (uint64_t) 0x80008000 >= (uint64_t) 1 << 32) |
5edad15d AM |
2211 | return false; |
2212 | ||
2213 | *value = addr; | |
2214 | return true; | |
2215 | } | |
2216 | ||
2217 | // Perform the Sized_relobj_file method, then set up opd info from | |
2218 | // .opd relocs. | |
2219 | ||
c9269dff AM |
2220 | template<int size, bool big_endian> |
2221 | void | |
2222 | Powerpc_relobj<size, big_endian>::do_read_relocs(Read_relocs_data* rd) | |
2223 | { | |
2224 | Sized_relobj_file<size, big_endian>::do_read_relocs(rd); | |
2225 | if (size == 64) | |
2226 | { | |
2227 | for (Read_relocs_data::Relocs_list::iterator p = rd->relocs.begin(); | |
2228 | p != rd->relocs.end(); | |
2229 | ++p) | |
2230 | { | |
2231 | if (p->data_shndx == this->opd_shndx()) | |
2232 | { | |
ec4dbad3 AM |
2233 | uint64_t opd_size = this->section_size(this->opd_shndx()); |
2234 | gold_assert(opd_size == static_cast<size_t>(opd_size)); | |
2235 | if (opd_size != 0) | |
2236 | { | |
2237 | this->init_opd(opd_size); | |
2238 | this->scan_opd_relocs(p->reloc_count, p->contents->data(), | |
2239 | rd->local_symbols->data()); | |
2240 | } | |
c9269dff AM |
2241 | break; |
2242 | } | |
cf43a2fe AM |
2243 | } |
2244 | } | |
cf43a2fe AM |
2245 | } |
2246 | ||
b4f7960d AM |
2247 | // Read the symbols then set up st_other vector. |
2248 | ||
2249 | template<int size, bool big_endian> | |
2250 | void | |
2251 | Powerpc_relobj<size, big_endian>::do_read_symbols(Read_symbols_data* sd) | |
2252 | { | |
f35c4853 | 2253 | this->base_read_symbols(sd); |
b4f7960d AM |
2254 | if (size == 64) |
2255 | { | |
2256 | const int shdr_size = elfcpp::Elf_sizes<size>::shdr_size; | |
2257 | const unsigned char* const pshdrs = sd->section_headers->data(); | |
2258 | const unsigned int loccount = this->do_local_symbol_count(); | |
2259 | if (loccount != 0) | |
2260 | { | |
2261 | this->st_other_.resize(loccount); | |
2262 | const int sym_size = elfcpp::Elf_sizes<size>::sym_size; | |
2263 | off_t locsize = loccount * sym_size; | |
2264 | const unsigned int symtab_shndx = this->symtab_shndx(); | |
2265 | const unsigned char *psymtab = pshdrs + symtab_shndx * shdr_size; | |
2266 | typename elfcpp::Shdr<size, big_endian> shdr(psymtab); | |
2267 | const unsigned char* psyms = this->get_view(shdr.get_sh_offset(), | |
2268 | locsize, true, false); | |
2269 | psyms += sym_size; | |
2270 | for (unsigned int i = 1; i < loccount; ++i, psyms += sym_size) | |
2271 | { | |
2272 | elfcpp::Sym<size, big_endian> sym(psyms); | |
2273 | unsigned char st_other = sym.get_st_other(); | |
2274 | this->st_other_[i] = st_other; | |
2275 | if ((st_other & elfcpp::STO_PPC64_LOCAL_MASK) != 0) | |
2276 | { | |
2277 | if (this->abiversion() == 0) | |
2278 | this->set_abiversion(2); | |
2279 | else if (this->abiversion() < 2) | |
2280 | gold_error(_("%s: local symbol %d has invalid st_other" | |
2281 | " for ABI version 1"), | |
2282 | this->name().c_str(), i); | |
2283 | } | |
2284 | } | |
2285 | } | |
2286 | } | |
2287 | } | |
2288 | ||
2289 | template<int size, bool big_endian> | |
2290 | void | |
2291 | Powerpc_dynobj<size, big_endian>::set_abiversion(int ver) | |
2292 | { | |
2293 | this->e_flags_ |= ver; | |
2294 | if (this->abiversion() != 0) | |
2295 | { | |
2296 | Target_powerpc<size, big_endian>* target = | |
2297 | static_cast<Target_powerpc<size, big_endian>*>( | |
2298 | parameters->sized_target<size, big_endian>()); | |
2299 | if (target->abiversion() == 0) | |
2300 | target->set_abiversion(this->abiversion()); | |
2301 | else if (target->abiversion() != this->abiversion()) | |
2302 | gold_error(_("%s: ABI version %d is not compatible " | |
2303 | "with ABI version %d output"), | |
2304 | this->name().c_str(), | |
2305 | this->abiversion(), target->abiversion()); | |
2306 | ||
2307 | } | |
2308 | } | |
2309 | ||
f35c4853 | 2310 | // Call Sized_dynobj::base_read_symbols to read the symbols then |
dc3714f3 AM |
2311 | // read .opd from a dynamic object, filling in opd_ent_ vector, |
2312 | ||
2313 | template<int size, bool big_endian> | |
2314 | void | |
2315 | Powerpc_dynobj<size, big_endian>::do_read_symbols(Read_symbols_data* sd) | |
2316 | { | |
f35c4853 | 2317 | this->base_read_symbols(sd); |
dc3714f3 AM |
2318 | if (size == 64) |
2319 | { | |
2320 | const int shdr_size = elfcpp::Elf_sizes<size>::shdr_size; | |
2321 | const unsigned char* const pshdrs = sd->section_headers->data(); | |
2322 | const unsigned char* namesu = sd->section_names->data(); | |
2323 | const char* names = reinterpret_cast<const char*>(namesu); | |
2324 | const unsigned char* s = NULL; | |
2325 | const unsigned char* opd; | |
2326 | section_size_type opd_size; | |
2327 | ||
2328 | // Find and read .opd section. | |
2329 | while (1) | |
2330 | { | |
2331 | s = this->template find_shdr<size, big_endian>(pshdrs, ".opd", names, | |
2332 | sd->section_names_size, | |
2333 | s); | |
2334 | if (s == NULL) | |
2335 | return; | |
2336 | ||
2337 | typename elfcpp::Shdr<size, big_endian> shdr(s); | |
2338 | if (shdr.get_sh_type() == elfcpp::SHT_PROGBITS | |
2339 | && (shdr.get_sh_flags() & elfcpp::SHF_ALLOC) != 0) | |
2340 | { | |
b4f7960d AM |
2341 | if (this->abiversion() == 0) |
2342 | this->set_abiversion(1); | |
2343 | else if (this->abiversion() > 1) | |
2344 | gold_error(_("%s: .opd invalid in abiv%d"), | |
2345 | this->name().c_str(), this->abiversion()); | |
2346 | ||
dc3714f3 AM |
2347 | this->opd_shndx_ = (s - pshdrs) / shdr_size; |
2348 | this->opd_address_ = shdr.get_sh_addr(); | |
2349 | opd_size = convert_to_section_size_type(shdr.get_sh_size()); | |
2350 | opd = this->get_view(shdr.get_sh_offset(), opd_size, | |
2351 | true, false); | |
2352 | break; | |
2353 | } | |
2354 | } | |
2355 | ||
2356 | // Build set of executable sections. | |
2357 | // Using a set is probably overkill. There is likely to be only | |
2358 | // a few executable sections, typically .init, .text and .fini, | |
2359 | // and they are generally grouped together. | |
2360 | typedef std::set<Sec_info> Exec_sections; | |
2361 | Exec_sections exec_sections; | |
2362 | s = pshdrs; | |
2363 | for (unsigned int i = 1; i < this->shnum(); ++i, s += shdr_size) | |
2364 | { | |
2365 | typename elfcpp::Shdr<size, big_endian> shdr(s); | |
2366 | if (shdr.get_sh_type() == elfcpp::SHT_PROGBITS | |
2367 | && ((shdr.get_sh_flags() | |
2368 | & (elfcpp::SHF_ALLOC | elfcpp::SHF_EXECINSTR)) | |
2369 | == (elfcpp::SHF_ALLOC | elfcpp::SHF_EXECINSTR)) | |
2370 | && shdr.get_sh_size() != 0) | |
2371 | { | |
2372 | exec_sections.insert(Sec_info(shdr.get_sh_addr(), | |
2373 | shdr.get_sh_size(), i)); | |
2374 | } | |
2375 | } | |
2376 | if (exec_sections.empty()) | |
2377 | return; | |
2378 | ||
2379 | // Look over the OPD entries. This is complicated by the fact | |
2380 | // that some binaries will use two-word entries while others | |
2381 | // will use the standard three-word entries. In most cases | |
2382 | // the third word (the environment pointer for languages like | |
2383 | // Pascal) is unused and will be zero. If the third word is | |
2384 | // used it should not be pointing into executable sections, | |
2385 | // I think. | |
2386 | this->init_opd(opd_size); | |
2387 | for (const unsigned char* p = opd; p < opd + opd_size; p += 8) | |
2388 | { | |
2389 | typedef typename elfcpp::Swap<64, big_endian>::Valtype Valtype; | |
2390 | const Valtype* valp = reinterpret_cast<const Valtype*>(p); | |
2391 | Valtype val = elfcpp::Swap<64, big_endian>::readval(valp); | |
2392 | if (val == 0) | |
2393 | // Chances are that this is the third word of an OPD entry. | |
2394 | continue; | |
2395 | typename Exec_sections::const_iterator e | |
2396 | = exec_sections.upper_bound(Sec_info(val, 0, 0)); | |
2397 | if (e != exec_sections.begin()) | |
2398 | { | |
2399 | --e; | |
2400 | if (e->start <= val && val < e->start + e->len) | |
2401 | { | |
2402 | // We have an address in an executable section. | |
2403 | // VAL ought to be the function entry, set it up. | |
2404 | this->set_opd_ent(p - opd, e->shndx, val); | |
2405 | // Skip second word of OPD entry, the TOC pointer. | |
2406 | p += 8; | |
2407 | } | |
2408 | } | |
2409 | // If we didn't match any executable sections, we likely | |
2410 | // have a non-zero third word in the OPD entry. | |
2411 | } | |
2412 | } | |
2413 | } | |
2414 | ||
5edad15d AM |
2415 | // Relocate sections. |
2416 | ||
2417 | template<int size, bool big_endian> | |
2418 | void | |
2419 | Powerpc_relobj<size, big_endian>::do_relocate_sections( | |
2420 | const Symbol_table* symtab, const Layout* layout, | |
2421 | const unsigned char* pshdrs, Output_file* of, | |
2422 | typename Sized_relobj_file<size, big_endian>::Views* pviews) | |
2423 | { | |
2424 | unsigned int start = 1; | |
2425 | if (size == 64 | |
2426 | && this->relatoc_ != 0 | |
2427 | && !parameters->options().relocatable()) | |
2428 | { | |
2429 | // Relocate .toc first. | |
2430 | this->relocate_section_range(symtab, layout, pshdrs, of, pviews, | |
2431 | this->relatoc_, this->relatoc_); | |
2432 | this->relocate_section_range(symtab, layout, pshdrs, of, pviews, | |
2433 | 1, this->relatoc_ - 1); | |
2434 | start = this->relatoc_ + 1; | |
2435 | } | |
2436 | this->relocate_section_range(symtab, layout, pshdrs, of, pviews, | |
2437 | start, this->shnum() - 1); | |
2438 | } | |
2439 | ||
f43ba157 | 2440 | // Set up some symbols. |
26a4e9cb AM |
2441 | |
2442 | template<int size, bool big_endian> | |
2443 | void | |
f43ba157 AM |
2444 | Target_powerpc<size, big_endian>::do_define_standard_symbols( |
2445 | Symbol_table* symtab, | |
2446 | Layout* layout) | |
26a4e9cb AM |
2447 | { |
2448 | if (size == 32) | |
2449 | { | |
bb66a627 AM |
2450 | // Define _GLOBAL_OFFSET_TABLE_ to ensure it isn't seen as |
2451 | // undefined when scanning relocs (and thus requires | |
26a4e9cb AM |
2452 | // non-relative dynamic relocs). The proper value will be |
2453 | // updated later. | |
2454 | Symbol *gotsym = symtab->lookup("_GLOBAL_OFFSET_TABLE_", NULL); | |
2455 | if (gotsym != NULL && gotsym->is_undefined()) | |
2456 | { | |
2457 | Target_powerpc<size, big_endian>* target = | |
2458 | static_cast<Target_powerpc<size, big_endian>*>( | |
2459 | parameters->sized_target<size, big_endian>()); | |
2460 | Output_data_got_powerpc<size, big_endian>* got | |
2461 | = target->got_section(symtab, layout); | |
2462 | symtab->define_in_output_data("_GLOBAL_OFFSET_TABLE_", NULL, | |
2463 | Symbol_table::PREDEFINED, | |
2464 | got, 0, 0, | |
2465 | elfcpp::STT_OBJECT, | |
bb66a627 | 2466 | elfcpp::STB_LOCAL, |
26a4e9cb AM |
2467 | elfcpp::STV_HIDDEN, 0, |
2468 | false, false); | |
2469 | } | |
2470 | ||
2471 | // Define _SDA_BASE_ at the start of the .sdata section + 32768. | |
2472 | Symbol *sdasym = symtab->lookup("_SDA_BASE_", NULL); | |
2473 | if (sdasym != NULL && sdasym->is_undefined()) | |
2474 | { | |
2475 | Output_data_space* sdata = new Output_data_space(4, "** sdata"); | |
2476 | Output_section* os | |
2477 | = layout->add_output_section_data(".sdata", 0, | |
2478 | elfcpp::SHF_ALLOC | |
2479 | | elfcpp::SHF_WRITE, | |
2480 | sdata, ORDER_SMALL_DATA, false); | |
2481 | symtab->define_in_output_data("_SDA_BASE_", NULL, | |
2482 | Symbol_table::PREDEFINED, | |
2483 | os, 32768, 0, elfcpp::STT_OBJECT, | |
2484 | elfcpp::STB_LOCAL, elfcpp::STV_HIDDEN, | |
2485 | 0, false, false); | |
2486 | } | |
2487 | } | |
b4f7960d AM |
2488 | else |
2489 | { | |
2490 | // Define .TOC. as for 32-bit _GLOBAL_OFFSET_TABLE_ | |
2491 | Symbol *gotsym = symtab->lookup(".TOC.", NULL); | |
2492 | if (gotsym != NULL && gotsym->is_undefined()) | |
2493 | { | |
2494 | Target_powerpc<size, big_endian>* target = | |
2495 | static_cast<Target_powerpc<size, big_endian>*>( | |
2496 | parameters->sized_target<size, big_endian>()); | |
2497 | Output_data_got_powerpc<size, big_endian>* got | |
2498 | = target->got_section(symtab, layout); | |
2499 | symtab->define_in_output_data(".TOC.", NULL, | |
2500 | Symbol_table::PREDEFINED, | |
2501 | got, 0x8000, 0, | |
2502 | elfcpp::STT_OBJECT, | |
2503 | elfcpp::STB_LOCAL, | |
2504 | elfcpp::STV_HIDDEN, 0, | |
2505 | false, false); | |
2506 | } | |
2507 | } | |
34e0882b AM |
2508 | |
2509 | this->tls_get_addr_ = symtab->lookup("__tls_get_addr"); | |
2510 | if (parameters->options().tls_get_addr_optimize() | |
2511 | && this->tls_get_addr_ != NULL | |
2512 | && this->tls_get_addr_->in_reg()) | |
2513 | this->tls_get_addr_opt_ = symtab->lookup("__tls_get_addr_opt"); | |
2514 | if (this->tls_get_addr_opt_ != NULL) | |
2515 | { | |
2516 | if (this->tls_get_addr_->is_undefined() | |
2517 | || this->tls_get_addr_->is_from_dynobj()) | |
2518 | { | |
2519 | // Make it seem as if references to __tls_get_addr are | |
2520 | // really to __tls_get_addr_opt, so the latter symbol is | |
2521 | // made dynamic, not the former. | |
2522 | this->tls_get_addr_->clear_in_reg(); | |
2523 | this->tls_get_addr_opt_->set_in_reg(); | |
2524 | } | |
2525 | // We have a non-dynamic definition for __tls_get_addr. | |
2526 | // Make __tls_get_addr_opt the same, if it does not already have | |
2527 | // a non-dynamic definition. | |
2528 | else if (this->tls_get_addr_opt_->is_undefined() | |
2529 | || this->tls_get_addr_opt_->is_from_dynobj()) | |
2530 | { | |
2531 | Sized_symbol<size>* from | |
2532 | = static_cast<Sized_symbol<size>*>(this->tls_get_addr_); | |
2533 | Sized_symbol<size>* to | |
2534 | = static_cast<Sized_symbol<size>*>(this->tls_get_addr_opt_); | |
2535 | symtab->clone<size>(to, from); | |
2536 | } | |
2537 | } | |
26a4e9cb AM |
2538 | } |
2539 | ||
cf43a2fe AM |
2540 | // Set up PowerPC target specific relobj. |
2541 | ||
2542 | template<int size, bool big_endian> | |
2543 | Object* | |
2544 | Target_powerpc<size, big_endian>::do_make_elf_object( | |
2545 | const std::string& name, | |
2546 | Input_file* input_file, | |
2547 | off_t offset, const elfcpp::Ehdr<size, big_endian>& ehdr) | |
2548 | { | |
2549 | int et = ehdr.get_e_type(); | |
957564c9 AS |
2550 | // ET_EXEC files are valid input for --just-symbols/-R, |
2551 | // and we treat them as relocatable objects. | |
2552 | if (et == elfcpp::ET_REL | |
2553 | || (et == elfcpp::ET_EXEC && input_file->just_symbols())) | |
cf43a2fe AM |
2554 | { |
2555 | Powerpc_relobj<size, big_endian>* obj = | |
c9269dff | 2556 | new Powerpc_relobj<size, big_endian>(name, input_file, offset, ehdr); |
cf43a2fe AM |
2557 | obj->setup(); |
2558 | return obj; | |
2559 | } | |
2560 | else if (et == elfcpp::ET_DYN) | |
2561 | { | |
dc3714f3 AM |
2562 | Powerpc_dynobj<size, big_endian>* obj = |
2563 | new Powerpc_dynobj<size, big_endian>(name, input_file, offset, ehdr); | |
cf43a2fe AM |
2564 | obj->setup(); |
2565 | return obj; | |
2566 | } | |
2567 | else | |
2568 | { | |
c9269dff | 2569 | gold_error(_("%s: unsupported ELF file type %d"), name.c_str(), et); |
cf43a2fe AM |
2570 | return NULL; |
2571 | } | |
2572 | } | |
2573 | ||
2574 | template<int size, bool big_endian> | |
2575 | class Output_data_got_powerpc : public Output_data_got<size, big_endian> | |
2576 | { | |
2577 | public: | |
2578 | typedef typename elfcpp::Elf_types<size>::Elf_Addr Valtype; | |
2579 | typedef Output_data_reloc<elfcpp::SHT_RELA, true, size, big_endian> Rela_dyn; | |
2580 | ||
2581 | Output_data_got_powerpc(Symbol_table* symtab, Layout* layout) | |
2582 | : Output_data_got<size, big_endian>(), | |
2583 | symtab_(symtab), layout_(layout), | |
2584 | header_ent_cnt_(size == 32 ? 3 : 1), | |
2585 | header_index_(size == 32 ? 0x2000 : 0) | |
751e4d66 AM |
2586 | { |
2587 | if (size == 64) | |
2588 | this->set_addralign(256); | |
2589 | } | |
cf43a2fe | 2590 | |
e84fe78f AM |
2591 | // Override all the Output_data_got methods we use so as to first call |
2592 | // reserve_ent(). | |
2593 | bool | |
2594 | add_global(Symbol* gsym, unsigned int got_type) | |
2595 | { | |
2596 | this->reserve_ent(); | |
2597 | return Output_data_got<size, big_endian>::add_global(gsym, got_type); | |
2598 | } | |
2599 | ||
2600 | bool | |
2601 | add_global_plt(Symbol* gsym, unsigned int got_type) | |
2602 | { | |
2603 | this->reserve_ent(); | |
2604 | return Output_data_got<size, big_endian>::add_global_plt(gsym, got_type); | |
2605 | } | |
2606 | ||
2607 | bool | |
2608 | add_global_tls(Symbol* gsym, unsigned int got_type) | |
2609 | { return this->add_global_plt(gsym, got_type); } | |
2610 | ||
2611 | void | |
2612 | add_global_with_rel(Symbol* gsym, unsigned int got_type, | |
2613 | Output_data_reloc_generic* rel_dyn, unsigned int r_type) | |
2614 | { | |
2615 | this->reserve_ent(); | |
2616 | Output_data_got<size, big_endian>:: | |
2617 | add_global_with_rel(gsym, got_type, rel_dyn, r_type); | |
2618 | } | |
2619 | ||
2620 | void | |
2621 | add_global_pair_with_rel(Symbol* gsym, unsigned int got_type, | |
2622 | Output_data_reloc_generic* rel_dyn, | |
2623 | unsigned int r_type_1, unsigned int r_type_2) | |
2624 | { | |
aacb3b6d AM |
2625 | if (gsym->has_got_offset(got_type)) |
2626 | return; | |
2627 | ||
e84fe78f AM |
2628 | this->reserve_ent(2); |
2629 | Output_data_got<size, big_endian>:: | |
2630 | add_global_pair_with_rel(gsym, got_type, rel_dyn, r_type_1, r_type_2); | |
2631 | } | |
2632 | ||
2633 | bool | |
2634 | add_local(Relobj* object, unsigned int sym_index, unsigned int got_type) | |
2635 | { | |
2636 | this->reserve_ent(); | |
2637 | return Output_data_got<size, big_endian>::add_local(object, sym_index, | |
2638 | got_type); | |
2639 | } | |
2640 | ||
2641 | bool | |
2642 | add_local_plt(Relobj* object, unsigned int sym_index, unsigned int got_type) | |
2643 | { | |
2644 | this->reserve_ent(); | |
2645 | return Output_data_got<size, big_endian>::add_local_plt(object, sym_index, | |
2646 | got_type); | |
2647 | } | |
2648 | ||
2649 | bool | |
2650 | add_local_tls(Relobj* object, unsigned int sym_index, unsigned int got_type) | |
2651 | { return this->add_local_plt(object, sym_index, got_type); } | |
2652 | ||
2653 | void | |
2654 | add_local_tls_pair(Relobj* object, unsigned int sym_index, | |
2655 | unsigned int got_type, | |
2656 | Output_data_reloc_generic* rel_dyn, | |
2657 | unsigned int r_type) | |
2658 | { | |
aacb3b6d AM |
2659 | if (object->local_has_got_offset(sym_index, got_type)) |
2660 | return; | |
2661 | ||
e84fe78f AM |
2662 | this->reserve_ent(2); |
2663 | Output_data_got<size, big_endian>:: | |
2664 | add_local_tls_pair(object, sym_index, got_type, rel_dyn, r_type); | |
2665 | } | |
2666 | ||
2667 | unsigned int | |
2668 | add_constant(Valtype constant) | |
2669 | { | |
2670 | this->reserve_ent(); | |
2671 | return Output_data_got<size, big_endian>::add_constant(constant); | |
2672 | } | |
2673 | ||
dd93cd0a AM |
2674 | unsigned int |
2675 | add_constant_pair(Valtype c1, Valtype c2) | |
2676 | { | |
2677 | this->reserve_ent(2); | |
e84fe78f | 2678 | return Output_data_got<size, big_endian>::add_constant_pair(c1, c2); |
dd93cd0a AM |
2679 | } |
2680 | ||
2681 | // Offset of _GLOBAL_OFFSET_TABLE_. | |
cf43a2fe AM |
2682 | unsigned int |
2683 | g_o_t() const | |
2684 | { | |
2685 | return this->got_offset(this->header_index_); | |
42cacb20 | 2686 | } |
cf43a2fe | 2687 | |
dd93cd0a AM |
2688 | // Offset of base used to access the GOT/TOC. |
2689 | // The got/toc pointer reg will be set to this value. | |
26a4e9cb | 2690 | Valtype |
dd93cd0a AM |
2691 | got_base_offset(const Powerpc_relobj<size, big_endian>* object) const |
2692 | { | |
2693 | if (size == 32) | |
2694 | return this->g_o_t(); | |
2695 | else | |
2696 | return (this->output_section()->address() | |
2697 | + object->toc_base_offset() | |
2698 | - this->address()); | |
2699 | } | |
2700 | ||
cf43a2fe AM |
2701 | // Ensure our GOT has a header. |
2702 | void | |
2703 | set_final_data_size() | |
2704 | { | |
2705 | if (this->header_ent_cnt_ != 0) | |
2706 | this->make_header(); | |
2707 | Output_data_got<size, big_endian>::set_final_data_size(); | |
2708 | } | |
2709 | ||
2710 | // First word of GOT header needs some values that are not | |
2711 | // handled by Output_data_got so poke them in here. | |
2712 | // For 32-bit, address of .dynamic, for 64-bit, address of TOCbase. | |
2713 | void | |
2714 | do_write(Output_file* of) | |
2715 | { | |
c9824451 AM |
2716 | Valtype val = 0; |
2717 | if (size == 32 && this->layout_->dynamic_data() != NULL) | |
2718 | val = this->layout_->dynamic_section()->address(); | |
2719 | if (size == 64) | |
2720 | val = this->output_section()->address() + 0x8000; | |
2721 | this->replace_constant(this->header_index_, val); | |
cf43a2fe AM |
2722 | Output_data_got<size, big_endian>::do_write(of); |
2723 | } | |
2724 | ||
2725 | private: | |
2726 | void | |
2727 | reserve_ent(unsigned int cnt = 1) | |
2728 | { | |
2729 | if (this->header_ent_cnt_ == 0) | |
2730 | return; | |
2731 | if (this->num_entries() + cnt > this->header_index_) | |
2732 | this->make_header(); | |
2733 | } | |
2734 | ||
2735 | void | |
2736 | make_header() | |
2737 | { | |
2738 | this->header_ent_cnt_ = 0; | |
2739 | this->header_index_ = this->num_entries(); | |
2740 | if (size == 32) | |
2741 | { | |
2742 | Output_data_got<size, big_endian>::add_constant(0); | |
2743 | Output_data_got<size, big_endian>::add_constant(0); | |
2744 | Output_data_got<size, big_endian>::add_constant(0); | |
2745 | ||
2746 | // Define _GLOBAL_OFFSET_TABLE_ at the header | |
bb66a627 AM |
2747 | Symbol *gotsym = this->symtab_->lookup("_GLOBAL_OFFSET_TABLE_", NULL); |
2748 | if (gotsym != NULL) | |
2749 | { | |
2750 | Sized_symbol<size>* sym = static_cast<Sized_symbol<size>*>(gotsym); | |
2751 | sym->set_value(this->g_o_t()); | |
2752 | } | |
2753 | else | |
2754 | this->symtab_->define_in_output_data("_GLOBAL_OFFSET_TABLE_", NULL, | |
2755 | Symbol_table::PREDEFINED, | |
2756 | this, this->g_o_t(), 0, | |
2757 | elfcpp::STT_OBJECT, | |
2758 | elfcpp::STB_LOCAL, | |
2759 | elfcpp::STV_HIDDEN, 0, | |
2760 | false, false); | |
cf43a2fe AM |
2761 | } |
2762 | else | |
2763 | Output_data_got<size, big_endian>::add_constant(0); | |
2764 | } | |
2765 | ||
2766 | // Stashed pointers. | |
2767 | Symbol_table* symtab_; | |
2768 | Layout* layout_; | |
2769 | ||
2770 | // GOT header size. | |
2771 | unsigned int header_ent_cnt_; | |
2772 | // GOT header index. | |
2773 | unsigned int header_index_; | |
42cacb20 DE |
2774 | }; |
2775 | ||
2776 | // Get the GOT section, creating it if necessary. | |
2777 | ||
2778 | template<int size, bool big_endian> | |
cf43a2fe | 2779 | Output_data_got_powerpc<size, big_endian>* |
42cacb20 DE |
2780 | Target_powerpc<size, big_endian>::got_section(Symbol_table* symtab, |
2781 | Layout* layout) | |
2782 | { | |
2783 | if (this->got_ == NULL) | |
2784 | { | |
2785 | gold_assert(symtab != NULL && layout != NULL); | |
2786 | ||
cf43a2fe AM |
2787 | this->got_ |
2788 | = new Output_data_got_powerpc<size, big_endian>(symtab, layout); | |
42cacb20 DE |
2789 | |
2790 | layout->add_output_section_data(".got", elfcpp::SHT_PROGBITS, | |
2791 | elfcpp::SHF_ALLOC | elfcpp::SHF_WRITE, | |
22f0da72 | 2792 | this->got_, ORDER_DATA, false); |
42cacb20 DE |
2793 | } |
2794 | ||
2795 | return this->got_; | |
2796 | } | |
2797 | ||
2798 | // Get the dynamic reloc section, creating it if necessary. | |
2799 | ||
2800 | template<int size, bool big_endian> | |
2801 | typename Target_powerpc<size, big_endian>::Reloc_section* | |
2802 | Target_powerpc<size, big_endian>::rela_dyn_section(Layout* layout) | |
2803 | { | |
2804 | if (this->rela_dyn_ == NULL) | |
2805 | { | |
2806 | gold_assert(layout != NULL); | |
2807 | this->rela_dyn_ = new Reloc_section(parameters->options().combreloc()); | |
2808 | layout->add_output_section_data(".rela.dyn", elfcpp::SHT_RELA, | |
22f0da72 ILT |
2809 | elfcpp::SHF_ALLOC, this->rela_dyn_, |
2810 | ORDER_DYNAMIC_RELOCS, false); | |
42cacb20 DE |
2811 | } |
2812 | return this->rela_dyn_; | |
2813 | } | |
2814 | ||
b3ccdeb5 AM |
2815 | // Similarly, but for ifunc symbols get the one for ifunc. |
2816 | ||
2817 | template<int size, bool big_endian> | |
2818 | typename Target_powerpc<size, big_endian>::Reloc_section* | |
2819 | Target_powerpc<size, big_endian>::rela_dyn_section(Symbol_table* symtab, | |
2820 | Layout* layout, | |
2821 | bool for_ifunc) | |
2822 | { | |
2823 | if (!for_ifunc) | |
2824 | return this->rela_dyn_section(layout); | |
2825 | ||
2826 | if (this->iplt_ == NULL) | |
2827 | this->make_iplt_section(symtab, layout); | |
2828 | return this->iplt_->rel_plt(); | |
2829 | } | |
2830 | ||
ec661b9d AM |
2831 | class Stub_control |
2832 | { | |
2833 | public: | |
2834 | // Determine the stub group size. The group size is the absolute | |
2835 | // value of the parameter --stub-group-size. If --stub-group-size | |
a5018ae5 | 2836 | // is passed a negative value, we restrict stubs to be always after |
ec661b9d | 2837 | // the stubbed branches. |
1c3a5fbe AM |
2838 | Stub_control(int32_t size, bool no_size_errors, bool multi_os) |
2839 | : stub_group_size_(abs(size)), stubs_always_after_branch_(size < 0), | |
2840 | suppress_size_errors_(no_size_errors), multi_os_(multi_os), | |
2841 | state_(NO_GROUP), group_size_(0), group_start_addr_(0), | |
2842 | owner_(NULL), output_section_(NULL) | |
ec661b9d | 2843 | { |
ec661b9d AM |
2844 | } |
2845 | ||
2846 | // Return true iff input section can be handled by current stub | |
2847 | // group. | |
2848 | bool | |
2849 | can_add_to_stub_group(Output_section* o, | |
2850 | const Output_section::Input_section* i, | |
2851 | bool has14); | |
2852 | ||
2853 | const Output_section::Input_section* | |
2854 | owner() | |
2855 | { return owner_; } | |
2856 | ||
2857 | Output_section* | |
2858 | output_section() | |
2859 | { return output_section_; } | |
2860 | ||
a20605cf AM |
2861 | void |
2862 | set_output_and_owner(Output_section* o, | |
2863 | const Output_section::Input_section* i) | |
2864 | { | |
2865 | this->output_section_ = o; | |
2866 | this->owner_ = i; | |
2867 | } | |
2868 | ||
ec661b9d AM |
2869 | private: |
2870 | typedef enum | |
2871 | { | |
1c3a5fbe | 2872 | // Initial state. |
ec661b9d | 2873 | NO_GROUP, |
1c3a5fbe | 2874 | // Adding group sections before the stubs. |
ec661b9d | 2875 | FINDING_STUB_SECTION, |
1c3a5fbe | 2876 | // Adding group sections after the stubs. |
ec661b9d AM |
2877 | HAS_STUB_SECTION |
2878 | } State; | |
2879 | ||
ec661b9d | 2880 | uint32_t stub_group_size_; |
a5018ae5 | 2881 | bool stubs_always_after_branch_; |
ec661b9d | 2882 | bool suppress_size_errors_; |
1c3a5fbe AM |
2883 | // True if a stub group can serve multiple output sections. |
2884 | bool multi_os_; | |
2885 | State state_; | |
8a37735f AM |
2886 | // Current max size of group. Starts at stub_group_size_ but is |
2887 | // reduced to stub_group_size_/1024 on seeing a section with | |
2888 | // external conditional branches. | |
2889 | uint32_t group_size_; | |
a5018ae5 | 2890 | uint64_t group_start_addr_; |
57f6d32d AM |
2891 | // owner_ and output_section_ specify the section to which stubs are |
2892 | // attached. The stubs are placed at the end of this section. | |
ec661b9d AM |
2893 | const Output_section::Input_section* owner_; |
2894 | Output_section* output_section_; | |
2895 | }; | |
2896 | ||
0cfdc767 | 2897 | // Return true iff input section can be handled by current stub |
a5018ae5 AM |
2898 | // group. Sections are presented to this function in order, |
2899 | // so the first section is the head of the group. | |
ec661b9d AM |
2900 | |
2901 | bool | |
2902 | Stub_control::can_add_to_stub_group(Output_section* o, | |
2903 | const Output_section::Input_section* i, | |
2904 | bool has14) | |
2905 | { | |
ec661b9d AM |
2906 | bool whole_sec = o->order() == ORDER_INIT || o->order() == ORDER_FINI; |
2907 | uint64_t this_size; | |
2908 | uint64_t start_addr = o->address(); | |
2909 | ||
2910 | if (whole_sec) | |
2911 | // .init and .fini sections are pasted together to form a single | |
2912 | // function. We can't be adding stubs in the middle of the function. | |
2913 | this_size = o->data_size(); | |
2914 | else | |
2915 | { | |
2916 | start_addr += i->relobj()->output_section_offset(i->shndx()); | |
2917 | this_size = i->data_size(); | |
2918 | } | |
57f6d32d | 2919 | |
a5018ae5 | 2920 | uint64_t end_addr = start_addr + this_size; |
8a37735f AM |
2921 | uint32_t group_size = this->stub_group_size_; |
2922 | if (has14) | |
2923 | this->group_size_ = group_size = group_size >> 10; | |
ec661b9d | 2924 | |
57f6d32d | 2925 | if (this_size > group_size && !this->suppress_size_errors_) |
ec661b9d AM |
2926 | gold_warning(_("%s:%s exceeds group size"), |
2927 | i->relobj()->name().c_str(), | |
2928 | i->relobj()->section_name(i->shndx()).c_str()); | |
2929 | ||
afe002dd AM |
2930 | gold_debug(DEBUG_TARGET, "maybe add%s %s:%s size=%#llx total=%#llx", |
2931 | has14 ? " 14bit" : "", | |
2932 | i->relobj()->name().c_str(), | |
2933 | i->relobj()->section_name(i->shndx()).c_str(), | |
2934 | (long long) this_size, | |
a5018ae5 AM |
2935 | (this->state_ == NO_GROUP |
2936 | ? this_size | |
2937 | : (long long) end_addr - this->group_start_addr_)); | |
afe002dd | 2938 | |
1c3a5fbe AM |
2939 | if (this->state_ == NO_GROUP) |
2940 | { | |
2941 | // Only here on very first use of Stub_control | |
2942 | this->owner_ = i; | |
2943 | this->output_section_ = o; | |
2944 | this->state_ = FINDING_STUB_SECTION; | |
2945 | this->group_size_ = group_size; | |
2946 | this->group_start_addr_ = start_addr; | |
2947 | return true; | |
2948 | } | |
2949 | else if (!this->multi_os_ && this->output_section_ != o) | |
2950 | ; | |
2951 | else if (this->state_ == HAS_STUB_SECTION) | |
ec661b9d | 2952 | { |
a5018ae5 | 2953 | // Can we add this section, which is after the stubs, to the |
57f6d32d | 2954 | // group? |
a5018ae5 | 2955 | if (end_addr - this->group_start_addr_ <= this->group_size_) |
57f6d32d | 2956 | return true; |
ec661b9d | 2957 | } |
a5018ae5 | 2958 | else if (this->state_ == FINDING_STUB_SECTION) |
ec661b9d | 2959 | { |
a5018ae5 AM |
2960 | if ((whole_sec && this->output_section_ == o) |
2961 | || end_addr - this->group_start_addr_ <= this->group_size_) | |
57f6d32d | 2962 | { |
a5018ae5 | 2963 | // Stubs are added at the end of "owner_". |
57f6d32d AM |
2964 | this->owner_ = i; |
2965 | this->output_section_ = o; | |
a5018ae5 | 2966 | return true; |
57f6d32d | 2967 | } |
a5018ae5 AM |
2968 | // The group before the stubs has reached maximum size. |
2969 | // Now see about adding sections after the stubs to the | |
2970 | // group. If the current section has a 14-bit branch and | |
2971 | // the group before the stubs exceeds group_size_ (because | |
2972 | // they didn't have 14-bit branches), don't add sections | |
2973 | // after the stubs: The size of stubs for such a large | |
2974 | // group may exceed the reach of a 14-bit branch. | |
2975 | if (!this->stubs_always_after_branch_ | |
2976 | && this_size <= this->group_size_ | |
2977 | && start_addr - this->group_start_addr_ <= this->group_size_) | |
57f6d32d | 2978 | { |
a5018ae5 AM |
2979 | gold_debug(DEBUG_TARGET, "adding after stubs"); |
2980 | this->state_ = HAS_STUB_SECTION; | |
2981 | this->group_start_addr_ = start_addr; | |
57f6d32d AM |
2982 | return true; |
2983 | } | |
ec661b9d | 2984 | } |
a5018ae5 AM |
2985 | else |
2986 | gold_unreachable(); | |
57f6d32d | 2987 | |
1c3a5fbe AM |
2988 | gold_debug(DEBUG_TARGET, |
2989 | !this->multi_os_ && this->output_section_ != o | |
2990 | ? "nope, new output section\n" | |
2991 | : "nope, didn't fit\n"); | |
afe002dd | 2992 | |
57f6d32d AM |
2993 | // The section fails to fit in the current group. Set up a few |
2994 | // things for the next group. owner_ and output_section_ will be | |
2995 | // set later after we've retrieved those values for the current | |
2996 | // group. | |
2997 | this->state_ = FINDING_STUB_SECTION; | |
8a37735f | 2998 | this->group_size_ = group_size; |
a5018ae5 | 2999 | this->group_start_addr_ = start_addr; |
57f6d32d | 3000 | return false; |
ec661b9d AM |
3001 | } |
3002 | ||
3003 | // Look over all the input sections, deciding where to place stubs. | |
3004 | ||
3005 | template<int size, bool big_endian> | |
3006 | void | |
3007 | Target_powerpc<size, big_endian>::group_sections(Layout* layout, | |
a3e60ddb AM |
3008 | const Task*, |
3009 | bool no_size_errors) | |
ec661b9d | 3010 | { |
1c3a5fbe AM |
3011 | Stub_control stub_control(this->stub_group_size_, no_size_errors, |
3012 | parameters->options().stub_group_multi()); | |
ec661b9d AM |
3013 | |
3014 | // Group input sections and insert stub table | |
a3e60ddb AM |
3015 | Stub_table_owner* table_owner = NULL; |
3016 | std::vector<Stub_table_owner*> tables; | |
ec661b9d AM |
3017 | Layout::Section_list section_list; |
3018 | layout->get_executable_sections(§ion_list); | |
3019 | std::stable_sort(section_list.begin(), section_list.end(), Sort_sections()); | |
a5018ae5 AM |
3020 | for (Layout::Section_list::iterator o = section_list.begin(); |
3021 | o != section_list.end(); | |
ec661b9d AM |
3022 | ++o) |
3023 | { | |
3024 | typedef Output_section::Input_section_list Input_section_list; | |
a5018ae5 AM |
3025 | for (Input_section_list::const_iterator i |
3026 | = (*o)->input_sections().begin(); | |
3027 | i != (*o)->input_sections().end(); | |
ec661b9d AM |
3028 | ++i) |
3029 | { | |
a3e60ddb AM |
3030 | if (i->is_input_section() |
3031 | || i->is_relaxed_input_section()) | |
ec661b9d AM |
3032 | { |
3033 | Powerpc_relobj<size, big_endian>* ppcobj = static_cast | |
3034 | <Powerpc_relobj<size, big_endian>*>(i->relobj()); | |
3035 | bool has14 = ppcobj->has_14bit_branch(i->shndx()); | |
3036 | if (!stub_control.can_add_to_stub_group(*o, &*i, has14)) | |
3037 | { | |
a3e60ddb AM |
3038 | table_owner->output_section = stub_control.output_section(); |
3039 | table_owner->owner = stub_control.owner(); | |
a20605cf | 3040 | stub_control.set_output_and_owner(*o, &*i); |
a3e60ddb | 3041 | table_owner = NULL; |
ec661b9d | 3042 | } |
a3e60ddb AM |
3043 | if (table_owner == NULL) |
3044 | { | |
3045 | table_owner = new Stub_table_owner; | |
3046 | tables.push_back(table_owner); | |
3047 | } | |
3048 | ppcobj->set_stub_table(i->shndx(), tables.size() - 1); | |
ec661b9d AM |
3049 | } |
3050 | } | |
3051 | } | |
a3e60ddb | 3052 | if (table_owner != NULL) |
0cfdc767 | 3053 | { |
a5018ae5 AM |
3054 | table_owner->output_section = stub_control.output_section(); |
3055 | table_owner->owner = stub_control.owner();; | |
a3e60ddb AM |
3056 | } |
3057 | for (typename std::vector<Stub_table_owner*>::iterator t = tables.begin(); | |
3058 | t != tables.end(); | |
3059 | ++t) | |
3060 | { | |
3061 | Stub_table<size, big_endian>* stub_table; | |
3062 | ||
3063 | if ((*t)->owner->is_input_section()) | |
3064 | stub_table = new Stub_table<size, big_endian>(this, | |
3065 | (*t)->output_section, | |
590b87ff AM |
3066 | (*t)->owner, |
3067 | this->stub_tables_.size()); | |
a3e60ddb AM |
3068 | else if ((*t)->owner->is_relaxed_input_section()) |
3069 | stub_table = static_cast<Stub_table<size, big_endian>*>( | |
3070 | (*t)->owner->relaxed_input_section()); | |
0cfdc767 | 3071 | else |
a3e60ddb AM |
3072 | gold_unreachable(); |
3073 | this->stub_tables_.push_back(stub_table); | |
3074 | delete *t; | |
0cfdc767 | 3075 | } |
ec661b9d AM |
3076 | } |
3077 | ||
a3e60ddb AM |
3078 | static unsigned long |
3079 | max_branch_delta (unsigned int r_type) | |
3080 | { | |
3081 | if (r_type == elfcpp::R_POWERPC_REL14 | |
3082 | || r_type == elfcpp::R_POWERPC_REL14_BRTAKEN | |
3083 | || r_type == elfcpp::R_POWERPC_REL14_BRNTAKEN) | |
3084 | return 1L << 15; | |
3085 | if (r_type == elfcpp::R_POWERPC_REL24 | |
3086 | || r_type == elfcpp::R_PPC_PLTREL24 | |
3087 | || r_type == elfcpp::R_PPC_LOCAL24PC) | |
3088 | return 1L << 25; | |
3089 | return 0; | |
3090 | } | |
3091 | ||
7e57d19e AM |
3092 | // Return whether this branch is going via a plt call stub. |
3093 | ||
3094 | template<int size, bool big_endian> | |
3095 | bool | |
3096 | Target_powerpc<size, big_endian>::Branch_info::mark_pltcall( | |
3097 | Powerpc_relobj<size, big_endian>* ppc_object, | |
3098 | unsigned int shndx, | |
3099 | Address offset, | |
3100 | Target_powerpc* target, | |
3101 | Symbol_table* symtab) | |
3102 | { | |
3103 | if (this->object_ != ppc_object | |
3104 | || this->shndx_ != shndx | |
3105 | || this->offset_ != offset) | |
3106 | return false; | |
3107 | ||
3108 | Symbol* sym = this->object_->global_symbol(this->r_sym_); | |
3109 | if (sym != NULL && sym->is_forwarder()) | |
3110 | sym = symtab->resolve_forwards(sym); | |
2778747c AM |
3111 | if (target->replace_tls_get_addr(sym)) |
3112 | sym = target->tls_get_addr_opt(); | |
7e57d19e AM |
3113 | const Sized_symbol<size>* gsym = static_cast<const Sized_symbol<size>*>(sym); |
3114 | if (gsym != NULL | |
7ee7ff70 AM |
3115 | ? (gsym->use_plt_offset(Scan::get_reference_flags(this->r_type_, target)) |
3116 | && !target->is_elfv2_localentry0(gsym)) | |
3117 | : (this->object_->local_has_plt_offset(this->r_sym_) | |
3118 | && !target->is_elfv2_localentry0(this->object_, this->r_sym_))) | |
7e57d19e AM |
3119 | { |
3120 | this->tocsave_ = 1; | |
3121 | return true; | |
3122 | } | |
3123 | return false; | |
3124 | } | |
3125 | ||
ec661b9d AM |
3126 | // If this branch needs a plt call stub, or a long branch stub, make one. |
3127 | ||
3128 | template<int size, bool big_endian> | |
a3e60ddb | 3129 | bool |
ec661b9d AM |
3130 | Target_powerpc<size, big_endian>::Branch_info::make_stub( |
3131 | Stub_table<size, big_endian>* stub_table, | |
3132 | Stub_table<size, big_endian>* ifunc_stub_table, | |
3133 | Symbol_table* symtab) const | |
3134 | { | |
3135 | Symbol* sym = this->object_->global_symbol(this->r_sym_); | |
88b8e639 AM |
3136 | Target_powerpc<size, big_endian>* target = |
3137 | static_cast<Target_powerpc<size, big_endian>*>( | |
3138 | parameters->sized_target<size, big_endian>()); | |
34e0882b AM |
3139 | if (sym != NULL && sym->is_forwarder()) |
3140 | sym = symtab->resolve_forwards(sym); | |
2778747c AM |
3141 | if (target->replace_tls_get_addr(sym)) |
3142 | sym = target->tls_get_addr_opt(); | |
34e0882b | 3143 | const Sized_symbol<size>* gsym = static_cast<const Sized_symbol<size>*>(sym); |
dc60b26d AM |
3144 | bool ok = true; |
3145 | ||
ec661b9d | 3146 | if (gsym != NULL |
88b8e639 | 3147 | ? gsym->use_plt_offset(Scan::get_reference_flags(this->r_type_, target)) |
ec661b9d AM |
3148 | : this->object_->local_has_plt_offset(this->r_sym_)) |
3149 | { | |
9055360d AM |
3150 | if (size == 64 |
3151 | && gsym != NULL | |
3152 | && target->abiversion() >= 2 | |
3153 | && !parameters->options().output_is_position_independent() | |
3154 | && !is_branch_reloc(this->r_type_)) | |
3155 | target->glink_section()->add_global_entry(gsym); | |
3156 | else | |
ec661b9d | 3157 | { |
64b5d6d7 AM |
3158 | if (stub_table == NULL |
3159 | && !(size == 32 | |
3160 | && gsym != NULL | |
3161 | && !parameters->options().output_is_position_independent() | |
3162 | && !is_branch_reloc(this->r_type_))) | |
9055360d AM |
3163 | stub_table = this->object_->stub_table(this->shndx_); |
3164 | if (stub_table == NULL) | |
3165 | { | |
64b5d6d7 AM |
3166 | // This is a ref from a data section to an ifunc symbol, |
3167 | // or a non-branch reloc for which we always want to use | |
3168 | // one set of stubs for resolving function addresses. | |
9055360d AM |
3169 | stub_table = ifunc_stub_table; |
3170 | } | |
3171 | gold_assert(stub_table != NULL); | |
a3e60ddb AM |
3172 | Address from = this->object_->get_output_section_offset(this->shndx_); |
3173 | if (from != invalid_address) | |
3174 | from += (this->object_->output_section(this->shndx_)->address() | |
3175 | + this->offset_); | |
9055360d | 3176 | if (gsym != NULL) |
dc60b26d AM |
3177 | ok = stub_table->add_plt_call_entry(from, |
3178 | this->object_, gsym, | |
7e57d19e AM |
3179 | this->r_type_, this->addend_, |
3180 | this->tocsave_); | |
9055360d | 3181 | else |
dc60b26d AM |
3182 | ok = stub_table->add_plt_call_entry(from, |
3183 | this->object_, this->r_sym_, | |
7e57d19e AM |
3184 | this->r_type_, this->addend_, |
3185 | this->tocsave_); | |
ec661b9d | 3186 | } |
ec661b9d AM |
3187 | } |
3188 | else | |
3189 | { | |
cbcb23fa | 3190 | Address max_branch_offset = max_branch_delta(this->r_type_); |
a3e60ddb AM |
3191 | if (max_branch_offset == 0) |
3192 | return true; | |
ec661b9d AM |
3193 | Address from = this->object_->get_output_section_offset(this->shndx_); |
3194 | gold_assert(from != invalid_address); | |
3195 | from += (this->object_->output_section(this->shndx_)->address() | |
3196 | + this->offset_); | |
3197 | Address to; | |
3198 | if (gsym != NULL) | |
3199 | { | |
3200 | switch (gsym->source()) | |
3201 | { | |
3202 | case Symbol::FROM_OBJECT: | |
3203 | { | |
3204 | Object* symobj = gsym->object(); | |
3205 | if (symobj->is_dynamic() | |
3206 | || symobj->pluginobj() != NULL) | |
a3e60ddb | 3207 | return true; |
ec661b9d AM |
3208 | bool is_ordinary; |
3209 | unsigned int shndx = gsym->shndx(&is_ordinary); | |
3210 | if (shndx == elfcpp::SHN_UNDEF) | |
a3e60ddb | 3211 | return true; |
ec661b9d AM |
3212 | } |
3213 | break; | |
3214 | ||
3215 | case Symbol::IS_UNDEFINED: | |
a3e60ddb | 3216 | return true; |
ec661b9d AM |
3217 | |
3218 | default: | |
3219 | break; | |
3220 | } | |
3221 | Symbol_table::Compute_final_value_status status; | |
3222 | to = symtab->compute_final_value<size>(gsym, &status); | |
3223 | if (status != Symbol_table::CFVS_OK) | |
a3e60ddb | 3224 | return true; |
9055360d AM |
3225 | if (size == 64) |
3226 | to += this->object_->ppc64_local_entry_offset(gsym); | |
ec661b9d AM |
3227 | } |
3228 | else | |
3229 | { | |
3230 | const Symbol_value<size>* psymval | |
3231 | = this->object_->local_symbol(this->r_sym_); | |
3232 | Symbol_value<size> symval; | |
0f125432 CC |
3233 | if (psymval->is_section_symbol()) |
3234 | symval.set_is_section_symbol(); | |
ec661b9d AM |
3235 | typedef Sized_relobj_file<size, big_endian> ObjType; |
3236 | typename ObjType::Compute_final_local_value_status status | |
3237 | = this->object_->compute_final_local_value(this->r_sym_, psymval, | |
3238 | &symval, symtab); | |
3239 | if (status != ObjType::CFLV_OK | |
3240 | || !symval.has_output_value()) | |
a3e60ddb | 3241 | return true; |
ec661b9d | 3242 | to = symval.value(this->object_, 0); |
9055360d AM |
3243 | if (size == 64) |
3244 | to += this->object_->ppc64_local_entry_offset(this->r_sym_); | |
ec661b9d | 3245 | } |
cbcb23fa AM |
3246 | if (!(size == 32 && this->r_type_ == elfcpp::R_PPC_PLTREL24)) |
3247 | to += this->addend_; | |
ec661b9d AM |
3248 | if (stub_table == NULL) |
3249 | stub_table = this->object_->stub_table(this->shndx_); | |
9055360d | 3250 | if (size == 64 && target->abiversion() < 2) |
ec661b9d AM |
3251 | { |
3252 | unsigned int dest_shndx; | |
1611bc4a AM |
3253 | if (!target->symval_for_branch(symtab, gsym, this->object_, |
3254 | &to, &dest_shndx)) | |
3255 | return true; | |
ec661b9d AM |
3256 | } |
3257 | Address delta = to - from; | |
3258 | if (delta + max_branch_offset >= 2 * max_branch_offset) | |
3259 | { | |
0cfdc767 AM |
3260 | if (stub_table == NULL) |
3261 | { | |
3262 | gold_warning(_("%s:%s: branch in non-executable section," | |
3263 | " no long branch stub for you"), | |
3264 | this->object_->name().c_str(), | |
3265 | this->object_->section_name(this->shndx_).c_str()); | |
a3e60ddb | 3266 | return true; |
0cfdc767 | 3267 | } |
d49044c7 AM |
3268 | bool save_res = (size == 64 |
3269 | && gsym != NULL | |
3270 | && gsym->source() == Symbol::IN_OUTPUT_DATA | |
3271 | && gsym->output_data() == target->savres_section()); | |
dc60b26d AM |
3272 | ok = stub_table->add_long_branch_entry(this->object_, |
3273 | this->r_type_, | |
3274 | from, to, save_res); | |
ec661b9d AM |
3275 | } |
3276 | } | |
dc60b26d AM |
3277 | if (!ok) |
3278 | gold_debug(DEBUG_TARGET, | |
3279 | "branch at %s:%s+%#lx\n" | |
3280 | "can't reach stub attached to %s:%s", | |
3281 | this->object_->name().c_str(), | |
3282 | this->object_->section_name(this->shndx_).c_str(), | |
3283 | (unsigned long) this->offset_, | |
3284 | stub_table->relobj()->name().c_str(), | |
3285 | stub_table->relobj()->section_name(stub_table->shndx()).c_str()); | |
3286 | ||
3287 | return ok; | |
ec661b9d AM |
3288 | } |
3289 | ||
3290 | // Relaxation hook. This is where we do stub generation. | |
3291 | ||
3292 | template<int size, bool big_endian> | |
3293 | bool | |
3294 | Target_powerpc<size, big_endian>::do_relax(int pass, | |
3295 | const Input_objects*, | |
3296 | Symbol_table* symtab, | |
3297 | Layout* layout, | |
3298 | const Task* task) | |
3299 | { | |
3300 | unsigned int prev_brlt_size = 0; | |
3301 | if (pass == 1) | |
ec661b9d | 3302 | { |
b4f7960d AM |
3303 | bool thread_safe |
3304 | = this->abiversion() < 2 && parameters->options().plt_thread_safe(); | |
3305 | if (size == 64 | |
3306 | && this->abiversion() < 2 | |
3307 | && !thread_safe | |
3308 | && !parameters->options().user_set_plt_thread_safe()) | |
ec661b9d | 3309 | { |
e2458743 | 3310 | static const char* const thread_starter[] = |
9e69ed50 AM |
3311 | { |
3312 | "pthread_create", | |
3313 | /* libstdc++ */ | |
3314 | "_ZNSt6thread15_M_start_threadESt10shared_ptrINS_10_Impl_baseEE", | |
3315 | /* librt */ | |
3316 | "aio_init", "aio_read", "aio_write", "aio_fsync", "lio_listio", | |
3317 | "mq_notify", "create_timer", | |
3318 | /* libanl */ | |
3319 | "getaddrinfo_a", | |
3320 | /* libgomp */ | |
80272b8c | 3321 | "GOMP_parallel", |
9e69ed50 | 3322 | "GOMP_parallel_start", |
80272b8c | 3323 | "GOMP_parallel_loop_static", |
9e69ed50 | 3324 | "GOMP_parallel_loop_static_start", |
80272b8c | 3325 | "GOMP_parallel_loop_dynamic", |
9e69ed50 | 3326 | "GOMP_parallel_loop_dynamic_start", |
80272b8c | 3327 | "GOMP_parallel_loop_guided", |
9e69ed50 | 3328 | "GOMP_parallel_loop_guided_start", |
80272b8c | 3329 | "GOMP_parallel_loop_runtime", |
9e69ed50 | 3330 | "GOMP_parallel_loop_runtime_start", |
80272b8c | 3331 | "GOMP_parallel_sections", |
43819297 | 3332 | "GOMP_parallel_sections_start", |
f9dffbf0 AM |
3333 | /* libgo */ |
3334 | "__go_go", | |
9e69ed50 AM |
3335 | }; |
3336 | ||
e2458743 AM |
3337 | if (parameters->options().shared()) |
3338 | thread_safe = true; | |
3339 | else | |
9e69ed50 | 3340 | { |
e2458743 AM |
3341 | for (unsigned int i = 0; |
3342 | i < sizeof(thread_starter) / sizeof(thread_starter[0]); | |
3343 | i++) | |
3344 | { | |
3345 | Symbol* sym = symtab->lookup(thread_starter[i], NULL); | |
3346 | thread_safe = (sym != NULL | |
3347 | && sym->in_reg() | |
3348 | && sym->in_real_elf()); | |
3349 | if (thread_safe) | |
3350 | break; | |
3351 | } | |
9e69ed50 | 3352 | } |
ec661b9d | 3353 | } |
9e69ed50 | 3354 | this->plt_thread_safe_ = thread_safe; |
a3e60ddb AM |
3355 | } |
3356 | ||
3357 | if (pass == 1) | |
3358 | { | |
3359 | this->stub_group_size_ = parameters->options().stub_group_size(); | |
3360 | bool no_size_errors = true; | |
3361 | if (this->stub_group_size_ == 1) | |
3362 | this->stub_group_size_ = 0x1c00000; | |
3363 | else if (this->stub_group_size_ == -1) | |
3364 | this->stub_group_size_ = -0x1e00000; | |
3365 | else | |
3366 | no_size_errors = false; | |
3367 | this->group_sections(layout, task, no_size_errors); | |
3368 | } | |
3369 | else if (this->relax_failed_ && this->relax_fail_count_ < 3) | |
3370 | { | |
3371 | this->branch_lookup_table_.clear(); | |
3372 | for (typename Stub_tables::iterator p = this->stub_tables_.begin(); | |
3373 | p != this->stub_tables_.end(); | |
3374 | ++p) | |
3375 | { | |
3376 | (*p)->clear_stubs(true); | |
3377 | } | |
3378 | this->stub_tables_.clear(); | |
3379 | this->stub_group_size_ = this->stub_group_size_ / 4 * 3; | |
57f6d32d | 3380 | gold_info(_("%s: stub group size is too large; retrying with %#x"), |
a3e60ddb AM |
3381 | program_name, this->stub_group_size_); |
3382 | this->group_sections(layout, task, true); | |
ec661b9d AM |
3383 | } |
3384 | ||
3385 | // We need address of stub tables valid for make_stub. | |
3386 | for (typename Stub_tables::iterator p = this->stub_tables_.begin(); | |
3387 | p != this->stub_tables_.end(); | |
3388 | ++p) | |
3389 | { | |
3390 | const Powerpc_relobj<size, big_endian>* object | |
3391 | = static_cast<const Powerpc_relobj<size, big_endian>*>((*p)->relobj()); | |
3392 | Address off = object->get_output_section_offset((*p)->shndx()); | |
3393 | gold_assert(off != invalid_address); | |
3394 | Output_section* os = (*p)->output_section(); | |
3395 | (*p)->set_address_and_size(os, off); | |
3396 | } | |
3397 | ||
9e69ed50 AM |
3398 | if (pass != 1) |
3399 | { | |
3400 | // Clear plt call stubs, long branch stubs and branch lookup table. | |
3401 | prev_brlt_size = this->branch_lookup_table_.size(); | |
3402 | this->branch_lookup_table_.clear(); | |
3403 | for (typename Stub_tables::iterator p = this->stub_tables_.begin(); | |
3404 | p != this->stub_tables_.end(); | |
3405 | ++p) | |
3406 | { | |
a3e60ddb | 3407 | (*p)->clear_stubs(false); |
9e69ed50 AM |
3408 | } |
3409 | } | |
3410 | ||
3411 | // Build all the stubs. | |
a3e60ddb | 3412 | this->relax_failed_ = false; |
ec661b9d AM |
3413 | Stub_table<size, big_endian>* ifunc_stub_table |
3414 | = this->stub_tables_.size() == 0 ? NULL : this->stub_tables_[0]; | |
3415 | Stub_table<size, big_endian>* one_stub_table | |
3416 | = this->stub_tables_.size() != 1 ? NULL : ifunc_stub_table; | |
3417 | for (typename Branches::const_iterator b = this->branch_info_.begin(); | |
3418 | b != this->branch_info_.end(); | |
3419 | b++) | |
3420 | { | |
a3e60ddb AM |
3421 | if (!b->make_stub(one_stub_table, ifunc_stub_table, symtab) |
3422 | && !this->relax_failed_) | |
3423 | { | |
3424 | this->relax_failed_ = true; | |
3425 | this->relax_fail_count_++; | |
3426 | if (this->relax_fail_count_ < 3) | |
3427 | return true; | |
3428 | } | |
ec661b9d AM |
3429 | } |
3430 | ||
9e69ed50 | 3431 | // Did anything change size? |
ec661b9d AM |
3432 | unsigned int num_huge_branches = this->branch_lookup_table_.size(); |
3433 | bool again = num_huge_branches != prev_brlt_size; | |
3434 | if (size == 64 && num_huge_branches != 0) | |
3435 | this->make_brlt_section(layout); | |
3436 | if (size == 64 && again) | |
3437 | this->brlt_section_->set_current_size(num_huge_branches); | |
3438 | ||
be897fb7 AM |
3439 | for (typename Stub_tables::reverse_iterator p = this->stub_tables_.rbegin(); |
3440 | p != this->stub_tables_.rend(); | |
3441 | ++p) | |
3442 | (*p)->remove_eh_frame(layout); | |
3443 | ||
3444 | for (typename Stub_tables::iterator p = this->stub_tables_.begin(); | |
3445 | p != this->stub_tables_.end(); | |
3446 | ++p) | |
3447 | (*p)->add_eh_frame(layout); | |
3448 | ||
ec661b9d AM |
3449 | typedef Unordered_set<Output_section*> Output_sections; |
3450 | Output_sections os_need_update; | |
3451 | for (typename Stub_tables::iterator p = this->stub_tables_.begin(); | |
3452 | p != this->stub_tables_.end(); | |
3453 | ++p) | |
3454 | { | |
3455 | if ((*p)->size_update()) | |
3456 | { | |
3457 | again = true; | |
3458 | os_need_update.insert((*p)->output_section()); | |
3459 | } | |
3460 | } | |
3461 | ||
9e69ed50 AM |
3462 | // Set output section offsets for all input sections in an output |
3463 | // section that just changed size. Anything past the stubs will | |
3464 | // need updating. | |
ec661b9d AM |
3465 | for (typename Output_sections::iterator p = os_need_update.begin(); |
3466 | p != os_need_update.end(); | |
3467 | p++) | |
3468 | { | |
3469 | Output_section* os = *p; | |
3470 | Address off = 0; | |
3471 | typedef Output_section::Input_section_list Input_section_list; | |
3472 | for (Input_section_list::const_iterator i = os->input_sections().begin(); | |
3473 | i != os->input_sections().end(); | |
3474 | ++i) | |
3475 | { | |
3476 | off = align_address(off, i->addralign()); | |
3477 | if (i->is_input_section() || i->is_relaxed_input_section()) | |
3478 | i->relobj()->set_section_offset(i->shndx(), off); | |
3479 | if (i->is_relaxed_input_section()) | |
3480 | { | |
3481 | Stub_table<size, big_endian>* stub_table | |
3482 | = static_cast<Stub_table<size, big_endian>*>( | |
3483 | i->relaxed_input_section()); | |
6395d38b HS |
3484 | Address stub_table_size = stub_table->set_address_and_size(os, off); |
3485 | off += stub_table_size; | |
3486 | // After a few iterations, set current stub table size | |
3487 | // as min size threshold, so later stub tables can only | |
3488 | // grow in size. | |
3489 | if (pass >= 4) | |
3490 | stub_table->set_min_size_threshold(stub_table_size); | |
ec661b9d AM |
3491 | } |
3492 | else | |
3493 | off += i->data_size(); | |
3494 | } | |
6830ee24 AM |
3495 | // If .branch_lt is part of this output section, then we have |
3496 | // just done the offset adjustment. | |
ec661b9d AM |
3497 | os->clear_section_offsets_need_adjustment(); |
3498 | } | |
3499 | ||
3500 | if (size == 64 | |
3501 | && !again | |
3502 | && num_huge_branches != 0 | |
3503 | && parameters->options().output_is_position_independent()) | |
3504 | { | |
3505 | // Fill in the BRLT relocs. | |
06f30c9d | 3506 | this->brlt_section_->reset_brlt_sizes(); |
ec661b9d AM |
3507 | for (typename Branch_lookup_table::const_iterator p |
3508 | = this->branch_lookup_table_.begin(); | |
3509 | p != this->branch_lookup_table_.end(); | |
3510 | ++p) | |
3511 | { | |
3512 | this->brlt_section_->add_reloc(p->first, p->second); | |
3513 | } | |
06f30c9d | 3514 | this->brlt_section_->finalize_brlt_sizes(); |
ec661b9d | 3515 | } |
590b87ff AM |
3516 | |
3517 | if (!again | |
3518 | && (parameters->options().user_set_emit_stub_syms() | |
3519 | ? parameters->options().emit_stub_syms() | |
3520 | : (size == 64 | |
3521 | || parameters->options().output_is_position_independent() | |
3522 | || parameters->options().emit_relocs()))) | |
3523 | { | |
3524 | for (typename Stub_tables::iterator p = this->stub_tables_.begin(); | |
3525 | p != this->stub_tables_.end(); | |
3526 | ++p) | |
3527 | (*p)->define_stub_syms(symtab); | |
3528 | ||
3529 | if (this->glink_ != NULL) | |
3530 | { | |
9e390558 | 3531 | int stub_size = this->glink_->pltresolve_size(); |
590b87ff AM |
3532 | Address value = -stub_size; |
3533 | if (size == 64) | |
3534 | { | |
3535 | value = 8; | |
3536 | stub_size -= 8; | |
3537 | } | |
3538 | this->define_local(symtab, "__glink_PLTresolve", | |
3539 | this->glink_, value, stub_size); | |
3540 | ||
3541 | if (size != 64) | |
3542 | this->define_local(symtab, "__glink", this->glink_, 0, 0); | |
3543 | } | |
3544 | } | |
3545 | ||
ec661b9d AM |
3546 | return again; |
3547 | } | |
3548 | ||
9d5781f8 AM |
3549 | template<int size, bool big_endian> |
3550 | void | |
3551 | Target_powerpc<size, big_endian>::do_plt_fde_location(const Output_data* plt, | |
3552 | unsigned char* oview, | |
3553 | uint64_t* paddress, | |
3554 | off_t* plen) const | |
3555 | { | |
3556 | uint64_t address = plt->address(); | |
3557 | off_t len = plt->data_size(); | |
3558 | ||
3559 | if (plt == this->glink_) | |
3560 | { | |
3561 | // See Output_data_glink::do_write() for glink contents. | |
5fe7ffdc AM |
3562 | if (len == 0) |
3563 | { | |
3564 | gold_assert(parameters->doing_static_link()); | |
3565 | // Static linking may need stubs, to support ifunc and long | |
3566 | // branches. We need to create an output section for | |
3567 | // .eh_frame early in the link process, to have a place to | |
3568 | // attach stub .eh_frame info. We also need to have | |
3569 | // registered a CIE that matches the stub CIE. Both of | |
3570 | // these requirements are satisfied by creating an FDE and | |
3571 | // CIE for .glink, even though static linking will leave | |
3572 | // .glink zero length. | |
3573 | // ??? Hopefully generating an FDE with a zero address range | |
3574 | // won't confuse anything that consumes .eh_frame info. | |
3575 | } | |
3576 | else if (size == 64) | |
9d5781f8 AM |
3577 | { |
3578 | // There is one word before __glink_PLTresolve | |
3579 | address += 8; | |
3580 | len -= 8; | |
3581 | } | |
3582 | else if (parameters->options().output_is_position_independent()) | |
3583 | { | |
3584 | // There are two FDEs for a position independent glink. | |
3585 | // The first covers the branch table, the second | |
3586 | // __glink_PLTresolve at the end of glink. | |
9e390558 | 3587 | off_t resolve_size = this->glink_->pltresolve_size(); |
5fe7ffdc | 3588 | if (oview[9] == elfcpp::DW_CFA_nop) |
9d5781f8 AM |
3589 | len -= resolve_size; |
3590 | else | |
3591 | { | |
3592 | address += len - resolve_size; | |
3593 | len = resolve_size; | |
3594 | } | |
3595 | } | |
3596 | } | |
3597 | else | |
3598 | { | |
3599 | // Must be a stub table. | |
3600 | const Stub_table<size, big_endian>* stub_table | |
3601 | = static_cast<const Stub_table<size, big_endian>*>(plt); | |
3602 | uint64_t stub_address = stub_table->stub_address(); | |
3603 | len -= stub_address - address; | |
3604 | address = stub_address; | |
3605 | } | |
3606 | ||
3607 | *paddress = address; | |
3608 | *plen = len; | |
3609 | } | |
3610 | ||
42cacb20 DE |
3611 | // A class to handle the PLT data. |
3612 | ||
3613 | template<int size, bool big_endian> | |
cf43a2fe | 3614 | class Output_data_plt_powerpc : public Output_section_data_build |
42cacb20 DE |
3615 | { |
3616 | public: | |
3617 | typedef Output_data_reloc<elfcpp::SHT_RELA, true, | |
3618 | size, big_endian> Reloc_section; | |
3619 | ||
e5d5f5ed AM |
3620 | Output_data_plt_powerpc(Target_powerpc<size, big_endian>* targ, |
3621 | Reloc_section* plt_rel, | |
e5d5f5ed AM |
3622 | const char* name) |
3623 | : Output_section_data_build(size == 32 ? 4 : 8), | |
3624 | rel_(plt_rel), | |
3625 | targ_(targ), | |
e5d5f5ed AM |
3626 | name_(name) |
3627 | { } | |
42cacb20 DE |
3628 | |
3629 | // Add an entry to the PLT. | |
03e25981 | 3630 | void |
cf43a2fe | 3631 | add_entry(Symbol*); |
42cacb20 | 3632 | |
03e25981 | 3633 | void |
e5d5f5ed AM |
3634 | add_ifunc_entry(Symbol*); |
3635 | ||
03e25981 | 3636 | void |
e5d5f5ed AM |
3637 | add_local_ifunc_entry(Sized_relobj_file<size, big_endian>*, unsigned int); |
3638 | ||
42cacb20 | 3639 | // Return the .rela.plt section data. |
e5d5f5ed | 3640 | Reloc_section* |
cf43a2fe AM |
3641 | rel_plt() const |
3642 | { | |
42cacb20 DE |
3643 | return this->rel_; |
3644 | } | |
3645 | ||
0e70b911 CC |
3646 | // Return the number of PLT entries. |
3647 | unsigned int | |
3648 | entry_count() const | |
d83ce4e3 | 3649 | { |
b3ccdeb5 AM |
3650 | if (this->current_data_size() == 0) |
3651 | return 0; | |
b4f7960d AM |
3652 | return ((this->current_data_size() - this->first_plt_entry_offset()) |
3653 | / this->plt_entry_size()); | |
d83ce4e3 | 3654 | } |
0e70b911 | 3655 | |
42cacb20 | 3656 | protected: |
42cacb20 | 3657 | void |
cf43a2fe | 3658 | do_adjust_output_section(Output_section* os) |
42cacb20 | 3659 | { |
cf43a2fe | 3660 | os->set_entsize(0); |
42cacb20 DE |
3661 | } |
3662 | ||
6ce78956 AM |
3663 | // Write to a map file. |
3664 | void | |
3665 | do_print_to_mapfile(Mapfile* mapfile) const | |
e5d5f5ed | 3666 | { mapfile->print_output_data(this, this->name_); } |
6ce78956 | 3667 | |
cf43a2fe | 3668 | private: |
b4f7960d AM |
3669 | // Return the offset of the first non-reserved PLT entry. |
3670 | unsigned int | |
3671 | first_plt_entry_offset() const | |
3672 | { | |
3673 | // IPLT has no reserved entry. | |
3674 | if (this->name_[3] == 'I') | |
3675 | return 0; | |
3676 | return this->targ_->first_plt_entry_offset(); | |
3677 | } | |
3678 | ||
3679 | // Return the size of each PLT entry. | |
3680 | unsigned int | |
3681 | plt_entry_size() const | |
3682 | { | |
3683 | return this->targ_->plt_entry_size(); | |
3684 | } | |
cf43a2fe | 3685 | |
42cacb20 DE |
3686 | // Write out the PLT data. |
3687 | void | |
3688 | do_write(Output_file*); | |
3689 | ||
3690 | // The reloc section. | |
3691 | Reloc_section* rel_; | |
cf43a2fe AM |
3692 | // Allows access to .glink for do_write. |
3693 | Target_powerpc<size, big_endian>* targ_; | |
e5d5f5ed AM |
3694 | // What to report in map file. |
3695 | const char *name_; | |
42cacb20 DE |
3696 | }; |
3697 | ||
e5d5f5ed | 3698 | // Add an entry to the PLT. |
42cacb20 DE |
3699 | |
3700 | template<int size, bool big_endian> | |
03e25981 | 3701 | void |
e5d5f5ed | 3702 | Output_data_plt_powerpc<size, big_endian>::add_entry(Symbol* gsym) |
42cacb20 | 3703 | { |
e5d5f5ed AM |
3704 | if (!gsym->has_plt_offset()) |
3705 | { | |
ec661b9d | 3706 | section_size_type off = this->current_data_size(); |
e5d5f5ed AM |
3707 | if (off == 0) |
3708 | off += this->first_plt_entry_offset(); | |
3709 | gsym->set_plt_offset(off); | |
3710 | gsym->set_needs_dynsym_entry(); | |
3711 | unsigned int dynrel = elfcpp::R_POWERPC_JMP_SLOT; | |
3712 | this->rel_->add_global(gsym, dynrel, this, off, 0); | |
b4f7960d | 3713 | off += this->plt_entry_size(); |
e5d5f5ed AM |
3714 | this->set_current_data_size(off); |
3715 | } | |
42cacb20 DE |
3716 | } |
3717 | ||
e5d5f5ed | 3718 | // Add an entry for a global ifunc symbol that resolves locally, to the IPLT. |
42cacb20 DE |
3719 | |
3720 | template<int size, bool big_endian> | |
03e25981 | 3721 | void |
e5d5f5ed | 3722 | Output_data_plt_powerpc<size, big_endian>::add_ifunc_entry(Symbol* gsym) |
42cacb20 | 3723 | { |
cf43a2fe AM |
3724 | if (!gsym->has_plt_offset()) |
3725 | { | |
ec661b9d | 3726 | section_size_type off = this->current_data_size(); |
cf43a2fe | 3727 | gsym->set_plt_offset(off); |
e5d5f5ed | 3728 | unsigned int dynrel = elfcpp::R_POWERPC_IRELATIVE; |
b4f7960d | 3729 | if (size == 64 && this->targ_->abiversion() < 2) |
e5d5f5ed AM |
3730 | dynrel = elfcpp::R_PPC64_JMP_IREL; |
3731 | this->rel_->add_symbolless_global_addend(gsym, dynrel, this, off, 0); | |
b4f7960d | 3732 | off += this->plt_entry_size(); |
e5d5f5ed AM |
3733 | this->set_current_data_size(off); |
3734 | } | |
3735 | } | |
3736 | ||
3737 | // Add an entry for a local ifunc symbol to the IPLT. | |
3738 | ||
3739 | template<int size, bool big_endian> | |
03e25981 | 3740 | void |
e5d5f5ed AM |
3741 | Output_data_plt_powerpc<size, big_endian>::add_local_ifunc_entry( |
3742 | Sized_relobj_file<size, big_endian>* relobj, | |
3743 | unsigned int local_sym_index) | |
3744 | { | |
3745 | if (!relobj->local_has_plt_offset(local_sym_index)) | |
3746 | { | |
ec661b9d | 3747 | section_size_type off = this->current_data_size(); |
e5d5f5ed AM |
3748 | relobj->set_local_plt_offset(local_sym_index, off); |
3749 | unsigned int dynrel = elfcpp::R_POWERPC_IRELATIVE; | |
b4f7960d | 3750 | if (size == 64 && this->targ_->abiversion() < 2) |
e5d5f5ed AM |
3751 | dynrel = elfcpp::R_PPC64_JMP_IREL; |
3752 | this->rel_->add_symbolless_local_addend(relobj, local_sym_index, dynrel, | |
3753 | this, off, 0); | |
b4f7960d | 3754 | off += this->plt_entry_size(); |
cf43a2fe AM |
3755 | this->set_current_data_size(off); |
3756 | } | |
42cacb20 DE |
3757 | } |
3758 | ||
dd93cd0a | 3759 | static const uint32_t add_0_11_11 = 0x7c0b5a14; |
9e69ed50 | 3760 | static const uint32_t add_2_2_11 = 0x7c425a14; |
549dba71 | 3761 | static const uint32_t add_2_2_12 = 0x7c426214; |
dd93cd0a AM |
3762 | static const uint32_t add_3_3_2 = 0x7c631214; |
3763 | static const uint32_t add_3_3_13 = 0x7c636a14; | |
34e0882b AM |
3764 | static const uint32_t add_3_12_2 = 0x7c6c1214; |
3765 | static const uint32_t add_3_12_13 = 0x7c6c6a14; | |
dd93cd0a | 3766 | static const uint32_t add_11_0_11 = 0x7d605a14; |
b4f7960d AM |
3767 | static const uint32_t add_11_2_11 = 0x7d625a14; |
3768 | static const uint32_t add_11_11_2 = 0x7d6b1214; | |
3769 | static const uint32_t addi_0_12 = 0x380c0000; | |
dd93cd0a | 3770 | static const uint32_t addi_2_2 = 0x38420000; |
dd93cd0a | 3771 | static const uint32_t addi_3_3 = 0x38630000; |
b4f7960d | 3772 | static const uint32_t addi_11_11 = 0x396b0000; |
bbec1a5d | 3773 | static const uint32_t addi_12_1 = 0x39810000; |
b4f7960d | 3774 | static const uint32_t addi_12_12 = 0x398c0000; |
dd93cd0a AM |
3775 | static const uint32_t addis_0_2 = 0x3c020000; |
3776 | static const uint32_t addis_0_13 = 0x3c0d0000; | |
bbec1a5d | 3777 | static const uint32_t addis_2_12 = 0x3c4c0000; |
b4f7960d | 3778 | static const uint32_t addis_11_2 = 0x3d620000; |
c9269dff AM |
3779 | static const uint32_t addis_11_11 = 0x3d6b0000; |
3780 | static const uint32_t addis_11_30 = 0x3d7e0000; | |
bbec1a5d | 3781 | static const uint32_t addis_12_1 = 0x3d810000; |
397998fc | 3782 | static const uint32_t addis_12_2 = 0x3d820000; |
c9269dff | 3783 | static const uint32_t addis_12_12 = 0x3d8c0000; |
c9269dff AM |
3784 | static const uint32_t b = 0x48000000; |
3785 | static const uint32_t bcl_20_31 = 0x429f0005; | |
3786 | static const uint32_t bctr = 0x4e800420; | |
34e0882b AM |
3787 | static const uint32_t bctrl = 0x4e800421; |
3788 | static const uint32_t beqlr = 0x4d820020; | |
f3a0ed29 | 3789 | static const uint32_t blr = 0x4e800020; |
9e69ed50 | 3790 | static const uint32_t bnectr_p4 = 0x4ce20420; |
bbec1a5d | 3791 | static const uint32_t cmpld_7_12_0 = 0x7fac0040; |
9e69ed50 | 3792 | static const uint32_t cmpldi_2_0 = 0x28220000; |
34e0882b AM |
3793 | static const uint32_t cmpdi_11_0 = 0x2c2b0000; |
3794 | static const uint32_t cmpwi_11_0 = 0x2c0b0000; | |
dd93cd0a AM |
3795 | static const uint32_t cror_15_15_15 = 0x4def7b82; |
3796 | static const uint32_t cror_31_31_31 = 0x4ffffb82; | |
f3a0ed29 AM |
3797 | static const uint32_t ld_0_1 = 0xe8010000; |
3798 | static const uint32_t ld_0_12 = 0xe80c0000; | |
dd93cd0a | 3799 | static const uint32_t ld_2_1 = 0xe8410000; |
dd93cd0a | 3800 | static const uint32_t ld_2_2 = 0xe8420000; |
b4f7960d | 3801 | static const uint32_t ld_2_11 = 0xe84b0000; |
549dba71 | 3802 | static const uint32_t ld_2_12 = 0xe84c0000; |
34e0882b | 3803 | static const uint32_t ld_11_1 = 0xe9610000; |
b4f7960d | 3804 | static const uint32_t ld_11_2 = 0xe9620000; |
34e0882b | 3805 | static const uint32_t ld_11_3 = 0xe9630000; |
b4f7960d AM |
3806 | static const uint32_t ld_11_11 = 0xe96b0000; |
3807 | static const uint32_t ld_12_2 = 0xe9820000; | |
34e0882b | 3808 | static const uint32_t ld_12_3 = 0xe9830000; |
b4f7960d | 3809 | static const uint32_t ld_12_11 = 0xe98b0000; |
9055360d | 3810 | static const uint32_t ld_12_12 = 0xe98c0000; |
f3a0ed29 | 3811 | static const uint32_t lfd_0_1 = 0xc8010000; |
dd93cd0a | 3812 | static const uint32_t li_0_0 = 0x38000000; |
f3a0ed29 | 3813 | static const uint32_t li_12_0 = 0x39800000; |
bbec1a5d | 3814 | static const uint32_t lis_0 = 0x3c000000; |
549dba71 | 3815 | static const uint32_t lis_2 = 0x3c400000; |
c9269dff AM |
3816 | static const uint32_t lis_11 = 0x3d600000; |
3817 | static const uint32_t lis_12 = 0x3d800000; | |
b4f7960d | 3818 | static const uint32_t lvx_0_12_0 = 0x7c0c00ce; |
c9269dff | 3819 | static const uint32_t lwz_0_12 = 0x800c0000; |
34e0882b | 3820 | static const uint32_t lwz_11_3 = 0x81630000; |
c9269dff AM |
3821 | static const uint32_t lwz_11_11 = 0x816b0000; |
3822 | static const uint32_t lwz_11_30 = 0x817e0000; | |
34e0882b | 3823 | static const uint32_t lwz_12_3 = 0x81830000; |
c9269dff | 3824 | static const uint32_t lwz_12_12 = 0x818c0000; |
dd93cd0a | 3825 | static const uint32_t lwzu_0_12 = 0x840c0000; |
c9269dff | 3826 | static const uint32_t mflr_0 = 0x7c0802a6; |
dd93cd0a | 3827 | static const uint32_t mflr_11 = 0x7d6802a6; |
c9269dff | 3828 | static const uint32_t mflr_12 = 0x7d8802a6; |
34e0882b AM |
3829 | static const uint32_t mr_0_3 = 0x7c601b78; |
3830 | static const uint32_t mr_3_0 = 0x7c030378; | |
c9269dff AM |
3831 | static const uint32_t mtctr_0 = 0x7c0903a6; |
3832 | static const uint32_t mtctr_11 = 0x7d6903a6; | |
ec661b9d | 3833 | static const uint32_t mtctr_12 = 0x7d8903a6; |
c9269dff | 3834 | static const uint32_t mtlr_0 = 0x7c0803a6; |
34e0882b | 3835 | static const uint32_t mtlr_11 = 0x7d6803a6; |
c9269dff | 3836 | static const uint32_t mtlr_12 = 0x7d8803a6; |
dd93cd0a | 3837 | static const uint32_t nop = 0x60000000; |
c9269dff | 3838 | static const uint32_t ori_0_0_0 = 0x60000000; |
b4f7960d | 3839 | static const uint32_t srdi_0_0_2 = 0x7800f082; |
f3a0ed29 AM |
3840 | static const uint32_t std_0_1 = 0xf8010000; |
3841 | static const uint32_t std_0_12 = 0xf80c0000; | |
dd93cd0a | 3842 | static const uint32_t std_2_1 = 0xf8410000; |
34e0882b | 3843 | static const uint32_t std_11_1 = 0xf9610000; |
f3a0ed29 AM |
3844 | static const uint32_t stfd_0_1 = 0xd8010000; |
3845 | static const uint32_t stvx_0_12_0 = 0x7c0c01ce; | |
dd93cd0a | 3846 | static const uint32_t sub_11_11_12 = 0x7d6c5850; |
b4f7960d AM |
3847 | static const uint32_t sub_12_12_11 = 0x7d8b6050; |
3848 | static const uint32_t xor_2_12_12 = 0x7d826278; | |
3849 | static const uint32_t xor_11_12_12 = 0x7d8b6278; | |
42cacb20 DE |
3850 | |
3851 | // Write out the PLT. | |
3852 | ||
3853 | template<int size, bool big_endian> | |
3854 | void | |
3855 | Output_data_plt_powerpc<size, big_endian>::do_write(Output_file* of) | |
3856 | { | |
b3ccdeb5 | 3857 | if (size == 32 && this->name_[3] != 'I') |
cf43a2fe | 3858 | { |
ec661b9d | 3859 | const section_size_type offset = this->offset(); |
cf43a2fe AM |
3860 | const section_size_type oview_size |
3861 | = convert_to_section_size_type(this->data_size()); | |
3862 | unsigned char* const oview = of->get_output_view(offset, oview_size); | |
3863 | unsigned char* pov = oview; | |
3864 | unsigned char* endpov = oview + oview_size; | |
3865 | ||
e5d5f5ed | 3866 | // The address of the .glink branch table |
cf43a2fe AM |
3867 | const Output_data_glink<size, big_endian>* glink |
3868 | = this->targ_->glink_section(); | |
ec661b9d | 3869 | elfcpp::Elf_types<32>::Elf_Addr branch_tab = glink->address(); |
cf43a2fe AM |
3870 | |
3871 | while (pov < endpov) | |
3872 | { | |
3873 | elfcpp::Swap<32, big_endian>::writeval(pov, branch_tab); | |
3874 | pov += 4; | |
3875 | branch_tab += 4; | |
3876 | } | |
3877 | ||
3878 | of->write_output_view(offset, oview_size, oview); | |
3879 | } | |
3880 | } | |
3881 | ||
3882 | // Create the PLT section. | |
3883 | ||
3884 | template<int size, bool big_endian> | |
3885 | void | |
40b469d7 AM |
3886 | Target_powerpc<size, big_endian>::make_plt_section(Symbol_table* symtab, |
3887 | Layout* layout) | |
cf43a2fe AM |
3888 | { |
3889 | if (this->plt_ == NULL) | |
3890 | { | |
40b469d7 AM |
3891 | if (this->got_ == NULL) |
3892 | this->got_section(symtab, layout); | |
3893 | ||
cf43a2fe AM |
3894 | if (this->glink_ == NULL) |
3895 | make_glink_section(layout); | |
3896 | ||
3897 | // Ensure that .rela.dyn always appears before .rela.plt This is | |
3898 | // necessary due to how, on PowerPC and some other targets, .rela.dyn | |
b3ccdeb5 | 3899 | // needs to include .rela.plt in its range. |
cf43a2fe AM |
3900 | this->rela_dyn_section(layout); |
3901 | ||
e5d5f5ed AM |
3902 | Reloc_section* plt_rel = new Reloc_section(false); |
3903 | layout->add_output_section_data(".rela.plt", elfcpp::SHT_RELA, | |
3904 | elfcpp::SHF_ALLOC, plt_rel, | |
3905 | ORDER_DYNAMIC_PLT_RELOCS, false); | |
3906 | this->plt_ | |
3907 | = new Output_data_plt_powerpc<size, big_endian>(this, plt_rel, | |
e5d5f5ed | 3908 | "** PLT"); |
cf43a2fe AM |
3909 | layout->add_output_section_data(".plt", |
3910 | (size == 32 | |
3911 | ? elfcpp::SHT_PROGBITS | |
3912 | : elfcpp::SHT_NOBITS), | |
3913 | elfcpp::SHF_ALLOC | elfcpp::SHF_WRITE, | |
3914 | this->plt_, | |
3915 | (size == 32 | |
3916 | ? ORDER_SMALL_DATA | |
3917 | : ORDER_SMALL_BSS), | |
3918 | false); | |
3254d32c AM |
3919 | |
3920 | Output_section* rela_plt_os = plt_rel->output_section(); | |
3921 | rela_plt_os->set_info_section(this->plt_->output_section()); | |
cf43a2fe AM |
3922 | } |
3923 | } | |
3924 | ||
e5d5f5ed AM |
3925 | // Create the IPLT section. |
3926 | ||
3927 | template<int size, bool big_endian> | |
3928 | void | |
40b469d7 AM |
3929 | Target_powerpc<size, big_endian>::make_iplt_section(Symbol_table* symtab, |
3930 | Layout* layout) | |
e5d5f5ed AM |
3931 | { |
3932 | if (this->iplt_ == NULL) | |
3933 | { | |
40b469d7 | 3934 | this->make_plt_section(symtab, layout); |
e5d5f5ed AM |
3935 | |
3936 | Reloc_section* iplt_rel = new Reloc_section(false); | |
6528b6eb AM |
3937 | if (this->rela_dyn_->output_section()) |
3938 | this->rela_dyn_->output_section()->add_output_section_data(iplt_rel); | |
e5d5f5ed AM |
3939 | this->iplt_ |
3940 | = new Output_data_plt_powerpc<size, big_endian>(this, iplt_rel, | |
b4f7960d | 3941 | "** IPLT"); |
6528b6eb AM |
3942 | if (this->plt_->output_section()) |
3943 | this->plt_->output_section()->add_output_section_data(this->iplt_); | |
e5d5f5ed AM |
3944 | } |
3945 | } | |
3946 | ||
ec661b9d | 3947 | // A section for huge long branch addresses, similar to plt section. |
cf43a2fe AM |
3948 | |
3949 | template<int size, bool big_endian> | |
ec661b9d | 3950 | class Output_data_brlt_powerpc : public Output_section_data_build |
cf43a2fe AM |
3951 | { |
3952 | public: | |
ec661b9d AM |
3953 | typedef typename elfcpp::Elf_types<size>::Elf_Addr Address; |
3954 | typedef Output_data_reloc<elfcpp::SHT_RELA, true, | |
3955 | size, big_endian> Reloc_section; | |
c9269dff | 3956 | |
ec661b9d AM |
3957 | Output_data_brlt_powerpc(Target_powerpc<size, big_endian>* targ, |
3958 | Reloc_section* brlt_rel) | |
3959 | : Output_section_data_build(size == 32 ? 4 : 8), | |
3960 | rel_(brlt_rel), | |
3961 | targ_(targ) | |
3962 | { } | |
cf43a2fe | 3963 | |
06f30c9d CC |
3964 | void |
3965 | reset_brlt_sizes() | |
3966 | { | |
3967 | this->reset_data_size(); | |
3968 | this->rel_->reset_data_size(); | |
3969 | } | |
3970 | ||
3971 | void | |
3972 | finalize_brlt_sizes() | |
3973 | { | |
3974 | this->finalize_data_size(); | |
3975 | this->rel_->finalize_data_size(); | |
3976 | } | |
3977 | ||
ec661b9d | 3978 | // Add a reloc for an entry in the BRLT. |
cf43a2fe | 3979 | void |
ec661b9d AM |
3980 | add_reloc(Address to, unsigned int off) |
3981 | { this->rel_->add_relative(elfcpp::R_POWERPC_RELATIVE, this, off, to); } | |
e5d5f5ed | 3982 | |
ec661b9d | 3983 | // Update section and reloc section size. |
e5d5f5ed | 3984 | void |
ec661b9d AM |
3985 | set_current_size(unsigned int num_branches) |
3986 | { | |
3987 | this->reset_address_and_file_offset(); | |
3988 | this->set_current_data_size(num_branches * 16); | |
3989 | this->finalize_data_size(); | |
3990 | Output_section* os = this->output_section(); | |
3991 | os->set_section_offsets_need_adjustment(); | |
3992 | if (this->rel_ != NULL) | |
3993 | { | |
0e123f69 | 3994 | const unsigned int reloc_size = elfcpp::Elf_sizes<size>::rela_size; |
ec661b9d AM |
3995 | this->rel_->reset_address_and_file_offset(); |
3996 | this->rel_->set_current_data_size(num_branches * reloc_size); | |
3997 | this->rel_->finalize_data_size(); | |
3998 | Output_section* os = this->rel_->output_section(); | |
3999 | os->set_section_offsets_need_adjustment(); | |
4000 | } | |
4001 | } | |
cf43a2fe | 4002 | |
ec661b9d AM |
4003 | protected: |
4004 | void | |
4005 | do_adjust_output_section(Output_section* os) | |
4006 | { | |
4007 | os->set_entsize(0); | |
4008 | } | |
e5d5f5ed | 4009 | |
ec661b9d AM |
4010 | // Write to a map file. |
4011 | void | |
4012 | do_print_to_mapfile(Mapfile* mapfile) const | |
4013 | { mapfile->print_output_data(this, "** BRLT"); } | |
c9824451 | 4014 | |
ec661b9d AM |
4015 | private: |
4016 | // Write out the BRLT data. | |
4017 | void | |
4018 | do_write(Output_file*); | |
c9824451 | 4019 | |
ec661b9d AM |
4020 | // The reloc section. |
4021 | Reloc_section* rel_; | |
4022 | Target_powerpc<size, big_endian>* targ_; | |
4023 | }; | |
cf43a2fe | 4024 | |
ec661b9d AM |
4025 | // Make the branch lookup table section. |
4026 | ||
4027 | template<int size, bool big_endian> | |
4028 | void | |
4029 | Target_powerpc<size, big_endian>::make_brlt_section(Layout* layout) | |
4030 | { | |
4031 | if (size == 64 && this->brlt_section_ == NULL) | |
4032 | { | |
4033 | Reloc_section* brlt_rel = NULL; | |
4034 | bool is_pic = parameters->options().output_is_position_independent(); | |
4035 | if (is_pic) | |
4036 | { | |
6830ee24 AM |
4037 | // When PIC we can't fill in .branch_lt (like .plt it can be |
4038 | // a bss style section) but must initialise at runtime via | |
6528b6eb | 4039 | // dynamic relocations. |
ec661b9d AM |
4040 | this->rela_dyn_section(layout); |
4041 | brlt_rel = new Reloc_section(false); | |
6528b6eb AM |
4042 | if (this->rela_dyn_->output_section()) |
4043 | this->rela_dyn_->output_section() | |
4044 | ->add_output_section_data(brlt_rel); | |
ec661b9d AM |
4045 | } |
4046 | this->brlt_section_ | |
4047 | = new Output_data_brlt_powerpc<size, big_endian>(this, brlt_rel); | |
6528b6eb | 4048 | if (this->plt_ && is_pic && this->plt_->output_section()) |
ec661b9d AM |
4049 | this->plt_->output_section() |
4050 | ->add_output_section_data(this->brlt_section_); | |
4051 | else | |
6830ee24 | 4052 | layout->add_output_section_data(".branch_lt", |
ec661b9d AM |
4053 | (is_pic ? elfcpp::SHT_NOBITS |
4054 | : elfcpp::SHT_PROGBITS), | |
4055 | elfcpp::SHF_ALLOC | elfcpp::SHF_WRITE, | |
4056 | this->brlt_section_, | |
4057 | (is_pic ? ORDER_SMALL_BSS | |
4058 | : ORDER_SMALL_DATA), | |
4059 | false); | |
4060 | } | |
4061 | } | |
4062 | ||
6830ee24 | 4063 | // Write out .branch_lt when non-PIC. |
ec661b9d AM |
4064 | |
4065 | template<int size, bool big_endian> | |
4066 | void | |
4067 | Output_data_brlt_powerpc<size, big_endian>::do_write(Output_file* of) | |
4068 | { | |
4069 | if (size == 64 && !parameters->options().output_is_position_independent()) | |
4070 | { | |
4071 | const section_size_type offset = this->offset(); | |
4072 | const section_size_type oview_size | |
4073 | = convert_to_section_size_type(this->data_size()); | |
4074 | unsigned char* const oview = of->get_output_view(offset, oview_size); | |
4075 | ||
4076 | this->targ_->write_branch_lookup_table(oview); | |
4077 | of->write_output_view(offset, oview_size, oview); | |
4078 | } | |
4079 | } | |
4080 | ||
9e69ed50 AM |
4081 | static inline uint32_t |
4082 | l(uint32_t a) | |
4083 | { | |
4084 | return a & 0xffff; | |
4085 | } | |
4086 | ||
4087 | static inline uint32_t | |
4088 | hi(uint32_t a) | |
4089 | { | |
4090 | return l(a >> 16); | |
4091 | } | |
4092 | ||
4093 | static inline uint32_t | |
4094 | ha(uint32_t a) | |
4095 | { | |
4096 | return hi(a + 0x8000); | |
4097 | } | |
4098 | ||
9d5781f8 AM |
4099 | template<int size> |
4100 | struct Eh_cie | |
4101 | { | |
4102 | static const unsigned char eh_frame_cie[12]; | |
4103 | }; | |
4104 | ||
4105 | template<int size> | |
4106 | const unsigned char Eh_cie<size>::eh_frame_cie[] = | |
4107 | { | |
4108 | 1, // CIE version. | |
4109 | 'z', 'R', 0, // Augmentation string. | |
4110 | 4, // Code alignment. | |
4111 | 0x80 - size / 8 , // Data alignment. | |
4112 | 65, // RA reg. | |
4113 | 1, // Augmentation size. | |
4114 | (elfcpp::DW_EH_PE_pcrel | |
4115 | | elfcpp::DW_EH_PE_sdata4), // FDE encoding. | |
4116 | elfcpp::DW_CFA_def_cfa, 1, 0 // def_cfa: r1 offset 0. | |
4117 | }; | |
4118 | ||
b4f7960d AM |
4119 | // Describe __glink_PLTresolve use of LR, 64-bit version ABIv1. |
4120 | static const unsigned char glink_eh_frame_fde_64v1[] = | |
9d5781f8 AM |
4121 | { |
4122 | 0, 0, 0, 0, // Replaced with offset to .glink. | |
4123 | 0, 0, 0, 0, // Replaced with size of .glink. | |
4124 | 0, // Augmentation size. | |
4125 | elfcpp::DW_CFA_advance_loc + 1, | |
4126 | elfcpp::DW_CFA_register, 65, 12, | |
15a3a14f | 4127 | elfcpp::DW_CFA_advance_loc + 5, |
9d5781f8 AM |
4128 | elfcpp::DW_CFA_restore_extended, 65 |
4129 | }; | |
4130 | ||
b4f7960d AM |
4131 | // Describe __glink_PLTresolve use of LR, 64-bit version ABIv2. |
4132 | static const unsigned char glink_eh_frame_fde_64v2[] = | |
4133 | { | |
4134 | 0, 0, 0, 0, // Replaced with offset to .glink. | |
4135 | 0, 0, 0, 0, // Replaced with size of .glink. | |
4136 | 0, // Augmentation size. | |
4137 | elfcpp::DW_CFA_advance_loc + 1, | |
4138 | elfcpp::DW_CFA_register, 65, 0, | |
15a3a14f | 4139 | elfcpp::DW_CFA_advance_loc + 7, |
b4f7960d AM |
4140 | elfcpp::DW_CFA_restore_extended, 65 |
4141 | }; | |
4142 | ||
9d5781f8 AM |
4143 | // Describe __glink_PLTresolve use of LR, 32-bit version. |
4144 | static const unsigned char glink_eh_frame_fde_32[] = | |
4145 | { | |
4146 | 0, 0, 0, 0, // Replaced with offset to .glink. | |
4147 | 0, 0, 0, 0, // Replaced with size of .glink. | |
4148 | 0, // Augmentation size. | |
4149 | elfcpp::DW_CFA_advance_loc + 2, | |
4150 | elfcpp::DW_CFA_register, 65, 0, | |
4151 | elfcpp::DW_CFA_advance_loc + 4, | |
4152 | elfcpp::DW_CFA_restore_extended, 65 | |
4153 | }; | |
4154 | ||
4155 | static const unsigned char default_fde[] = | |
4156 | { | |
4157 | 0, 0, 0, 0, // Replaced with offset to stubs. | |
4158 | 0, 0, 0, 0, // Replaced with size of stubs. | |
4159 | 0, // Augmentation size. | |
4160 | elfcpp::DW_CFA_nop, // Pad. | |
4161 | elfcpp::DW_CFA_nop, | |
4162 | elfcpp::DW_CFA_nop | |
4163 | }; | |
4164 | ||
9e69ed50 AM |
4165 | template<bool big_endian> |
4166 | static inline void | |
4167 | write_insn(unsigned char* p, uint32_t v) | |
4168 | { | |
4169 | elfcpp::Swap<32, big_endian>::writeval(p, v); | |
4170 | } | |
4171 | ||
691d2e9a AM |
4172 | template<int size> |
4173 | static inline unsigned int | |
4174 | param_plt_align() | |
4175 | { | |
4176 | if (!parameters->options().user_set_plt_align()) | |
4177 | return size == 64 ? 32 : 8; | |
4178 | return 1 << parameters->options().plt_align(); | |
4179 | } | |
4180 | ||
ec661b9d AM |
4181 | // Stub_table holds information about plt and long branch stubs. |
4182 | // Stubs are built in an area following some input section determined | |
4183 | // by group_sections(). This input section is converted to a relaxed | |
4184 | // input section allowing it to be resized to accommodate the stubs | |
4185 | ||
4186 | template<int size, bool big_endian> | |
4187 | class Stub_table : public Output_relaxed_input_section | |
4188 | { | |
4189 | public: | |
7e57d19e AM |
4190 | struct Plt_stub_ent |
4191 | { | |
4192 | Plt_stub_ent(unsigned int off, unsigned int indx) | |
7ee7ff70 | 4193 | : off_(off), indx_(indx), r2save_(0), localentry0_(0) |
7e57d19e AM |
4194 | { } |
4195 | ||
4196 | unsigned int off_; | |
7ee7ff70 | 4197 | unsigned int indx_ : 30; |
7e57d19e | 4198 | unsigned int r2save_ : 1; |
7ee7ff70 | 4199 | unsigned int localentry0_ : 1; |
7e57d19e | 4200 | }; |
ec661b9d AM |
4201 | typedef typename elfcpp::Elf_types<size>::Elf_Addr Address; |
4202 | static const Address invalid_address = static_cast<Address>(0) - 1; | |
4203 | ||
a3e60ddb AM |
4204 | Stub_table(Target_powerpc<size, big_endian>* targ, |
4205 | Output_section* output_section, | |
590b87ff AM |
4206 | const Output_section::Input_section* owner, |
4207 | uint32_t id) | |
a3e60ddb AM |
4208 | : Output_relaxed_input_section(owner->relobj(), owner->shndx(), |
4209 | owner->relobj() | |
4210 | ->section_addralign(owner->shndx())), | |
ec661b9d | 4211 | targ_(targ), plt_call_stubs_(), long_branch_stubs_(), |
a3e60ddb AM |
4212 | orig_data_size_(owner->current_data_size()), |
4213 | plt_size_(0), last_plt_size_(0), | |
6395d38b | 4214 | branch_size_(0), last_branch_size_(0), min_size_threshold_(0), |
34e0882b AM |
4215 | need_save_res_(false), uniq_(id), tls_get_addr_opt_bctrl_(-1u), |
4216 | plt_fde_len_(0) | |
a3e60ddb AM |
4217 | { |
4218 | this->set_output_section(output_section); | |
ec661b9d | 4219 | |
a3e60ddb AM |
4220 | std::vector<Output_relaxed_input_section*> new_relaxed; |
4221 | new_relaxed.push_back(this); | |
4222 | output_section->convert_input_sections_to_relaxed_sections(new_relaxed); | |
4223 | } | |
ec661b9d AM |
4224 | |
4225 | // Add a plt call stub. | |
a3e60ddb AM |
4226 | bool |
4227 | add_plt_call_entry(Address, | |
4228 | const Sized_relobj_file<size, big_endian>*, | |
ec661b9d AM |
4229 | const Symbol*, |
4230 | unsigned int, | |
7e57d19e AM |
4231 | Address, |
4232 | bool); | |
ec661b9d | 4233 | |
a3e60ddb AM |
4234 | bool |
4235 | add_plt_call_entry(Address, | |
4236 | const Sized_relobj_file<size, big_endian>*, | |
ec661b9d AM |
4237 | unsigned int, |
4238 | unsigned int, | |
7e57d19e AM |
4239 | Address, |
4240 | bool); | |
ec661b9d AM |
4241 | |
4242 | // Find a given plt call stub. | |
7e57d19e | 4243 | const Plt_stub_ent* |
ec661b9d AM |
4244 | find_plt_call_entry(const Symbol*) const; |
4245 | ||
7e57d19e | 4246 | const Plt_stub_ent* |
ec661b9d AM |
4247 | find_plt_call_entry(const Sized_relobj_file<size, big_endian>*, |
4248 | unsigned int) const; | |
4249 | ||
7e57d19e | 4250 | const Plt_stub_ent* |
ec661b9d AM |
4251 | find_plt_call_entry(const Sized_relobj_file<size, big_endian>*, |
4252 | const Symbol*, | |
4253 | unsigned int, | |
4254 | Address) const; | |
4255 | ||
7e57d19e | 4256 | const Plt_stub_ent* |
ec661b9d AM |
4257 | find_plt_call_entry(const Sized_relobj_file<size, big_endian>*, |
4258 | unsigned int, | |
4259 | unsigned int, | |
4260 | Address) const; | |
4261 | ||
4262 | // Add a long branch stub. | |
a3e60ddb AM |
4263 | bool |
4264 | add_long_branch_entry(const Powerpc_relobj<size, big_endian>*, | |
d49044c7 | 4265 | unsigned int, Address, Address, bool); |
ec661b9d AM |
4266 | |
4267 | Address | |
9d5781f8 AM |
4268 | find_long_branch_entry(const Powerpc_relobj<size, big_endian>*, |
4269 | Address) const; | |
ec661b9d | 4270 | |
a3e60ddb AM |
4271 | bool |
4272 | can_reach_stub(Address from, unsigned int off, unsigned int r_type) | |
4273 | { | |
cbcb23fa | 4274 | Address max_branch_offset = max_branch_delta(r_type); |
a3e60ddb AM |
4275 | if (max_branch_offset == 0) |
4276 | return true; | |
4277 | gold_assert(from != invalid_address); | |
4278 | Address loc = off + this->stub_address(); | |
4279 | return loc - from + max_branch_offset < 2 * max_branch_offset; | |
4280 | } | |
4281 | ||
ec661b9d | 4282 | void |
a3e60ddb | 4283 | clear_stubs(bool all) |
cf43a2fe | 4284 | { |
9e69ed50 AM |
4285 | this->plt_call_stubs_.clear(); |
4286 | this->plt_size_ = 0; | |
ec661b9d AM |
4287 | this->long_branch_stubs_.clear(); |
4288 | this->branch_size_ = 0; | |
d49044c7 | 4289 | this->need_save_res_ = false; |
a3e60ddb AM |
4290 | if (all) |
4291 | { | |
4292 | this->last_plt_size_ = 0; | |
4293 | this->last_branch_size_ = 0; | |
4294 | } | |
cf43a2fe AM |
4295 | } |
4296 | ||
ec661b9d AM |
4297 | Address |
4298 | set_address_and_size(const Output_section* os, Address off) | |
cf43a2fe | 4299 | { |
ec661b9d AM |
4300 | Address start_off = off; |
4301 | off += this->orig_data_size_; | |
4302 | Address my_size = this->plt_size_ + this->branch_size_; | |
d49044c7 AM |
4303 | if (this->need_save_res_) |
4304 | my_size += this->targ_->savres_section()->data_size(); | |
ec661b9d AM |
4305 | if (my_size != 0) |
4306 | off = align_address(off, this->stub_align()); | |
4307 | // Include original section size and alignment padding in size | |
4308 | my_size += off - start_off; | |
6395d38b HS |
4309 | // Ensure new size is always larger than min size |
4310 | // threshold. Alignment requirement is included in "my_size", so | |
4311 | // increase "my_size" does not invalidate alignment. | |
4312 | if (my_size < this->min_size_threshold_) | |
4313 | my_size = this->min_size_threshold_; | |
ec661b9d AM |
4314 | this->reset_address_and_file_offset(); |
4315 | this->set_current_data_size(my_size); | |
4316 | this->set_address_and_file_offset(os->address() + start_off, | |
4317 | os->offset() + start_off); | |
4318 | return my_size; | |
cf43a2fe AM |
4319 | } |
4320 | ||
ec661b9d | 4321 | Address |
9d5781f8 | 4322 | stub_address() const |
ec661b9d AM |
4323 | { |
4324 | return align_address(this->address() + this->orig_data_size_, | |
4325 | this->stub_align()); | |
4326 | } | |
4327 | ||
4328 | Address | |
9d5781f8 | 4329 | stub_offset() const |
ec661b9d AM |
4330 | { |
4331 | return align_address(this->offset() + this->orig_data_size_, | |
4332 | this->stub_align()); | |
4333 | } | |
4334 | ||
4335 | section_size_type | |
4336 | plt_size() const | |
4337 | { return this->plt_size_; } | |
4338 | ||
590b87ff AM |
4339 | void |
4340 | set_min_size_threshold(Address min_size) | |
6395d38b HS |
4341 | { this->min_size_threshold_ = min_size; } |
4342 | ||
590b87ff AM |
4343 | void |
4344 | define_stub_syms(Symbol_table*); | |
4345 | ||
ec661b9d AM |
4346 | bool |
4347 | size_update() | |
4348 | { | |
4349 | Output_section* os = this->output_section(); | |
4350 | if (os->addralign() < this->stub_align()) | |
4351 | { | |
4352 | os->set_addralign(this->stub_align()); | |
4353 | // FIXME: get rid of the insane checkpointing. | |
4354 | // We can't increase alignment of the input section to which | |
4355 | // stubs are attached; The input section may be .init which | |
4356 | // is pasted together with other .init sections to form a | |
4357 | // function. Aligning might insert zero padding resulting in | |
4358 | // sigill. However we do need to increase alignment of the | |
4359 | // output section so that the align_address() on offset in | |
4360 | // set_address_and_size() adds the same padding as the | |
4361 | // align_address() on address in stub_address(). | |
4362 | // What's more, we need this alignment for the layout done in | |
4363 | // relaxation_loop_body() so that the output section starts at | |
4364 | // a suitably aligned address. | |
4365 | os->checkpoint_set_addralign(this->stub_align()); | |
4366 | } | |
9e69ed50 AM |
4367 | if (this->last_plt_size_ != this->plt_size_ |
4368 | || this->last_branch_size_ != this->branch_size_) | |
ec661b9d | 4369 | { |
9e69ed50 AM |
4370 | this->last_plt_size_ = this->plt_size_; |
4371 | this->last_branch_size_ = this->branch_size_; | |
ec661b9d AM |
4372 | return true; |
4373 | } | |
4374 | return false; | |
4375 | } | |
4376 | ||
34e0882b | 4377 | // Generate a suitable FDE to describe code in this stub group. |
9d5781f8 | 4378 | void |
34e0882b | 4379 | init_plt_fde(); |
be897fb7 | 4380 | |
34e0882b AM |
4381 | // Add .eh_frame info for this stub section. |
4382 | void | |
4383 | add_eh_frame(Layout* layout); | |
be897fb7 | 4384 | |
34e0882b | 4385 | // Remove .eh_frame info for this stub section. |
be897fb7 | 4386 | void |
34e0882b | 4387 | remove_eh_frame(Layout* layout); |
9d5781f8 | 4388 | |
ec661b9d AM |
4389 | Target_powerpc<size, big_endian>* |
4390 | targ() const | |
4391 | { return targ_; } | |
6ce78956 | 4392 | |
cf43a2fe | 4393 | private: |
bdab445c AM |
4394 | class Plt_stub_key; |
4395 | class Plt_stub_key_hash; | |
bdab445c AM |
4396 | typedef Unordered_map<Plt_stub_key, Plt_stub_ent, |
4397 | Plt_stub_key_hash> Plt_stub_entries; | |
590b87ff AM |
4398 | class Branch_stub_ent; |
4399 | class Branch_stub_ent_hash; | |
4400 | typedef Unordered_map<Branch_stub_ent, unsigned int, | |
4401 | Branch_stub_ent_hash> Branch_stub_entries; | |
9e69ed50 AM |
4402 | |
4403 | // Alignment of stub section. | |
ec661b9d | 4404 | unsigned int |
9e69ed50 AM |
4405 | stub_align() const |
4406 | { | |
691d2e9a | 4407 | unsigned int min_align = size == 64 ? 32 : 16; |
9e69ed50 AM |
4408 | unsigned int user_align = 1 << parameters->options().plt_align(); |
4409 | return std::max(user_align, min_align); | |
4410 | } | |
cf43a2fe | 4411 | |
91c2b899 AM |
4412 | // Return the plt offset for the given call stub. |
4413 | Address | |
4414 | plt_off(typename Plt_stub_entries::const_iterator p, bool* is_iplt) const | |
4415 | { | |
4416 | const Symbol* gsym = p->first.sym_; | |
4417 | if (gsym != NULL) | |
4418 | { | |
4419 | *is_iplt = (gsym->type() == elfcpp::STT_GNU_IFUNC | |
4420 | && gsym->can_use_relative_reloc(false)); | |
4421 | return gsym->plt_offset(); | |
4422 | } | |
4423 | else | |
4424 | { | |
4425 | *is_iplt = true; | |
4426 | const Sized_relobj_file<size, big_endian>* relobj = p->first.object_; | |
4427 | unsigned int local_sym_index = p->first.locsym_; | |
4428 | return relobj->local_plt_offset(local_sym_index); | |
4429 | } | |
4430 | } | |
4431 | ||
9e69ed50 | 4432 | // Size of a given plt call stub. |
ec661b9d | 4433 | unsigned int |
9e69ed50 AM |
4434 | plt_call_size(typename Plt_stub_entries::const_iterator p) const |
4435 | { | |
4436 | if (size == 32) | |
34e0882b AM |
4437 | { |
4438 | const Symbol* gsym = p->first.sym_; | |
9e390558 AM |
4439 | return (4 * 4 |
4440 | + (this->targ_->is_tls_get_addr_opt(gsym) ? 8 * 4 : 0)); | |
34e0882b | 4441 | } |
9e69ed50 | 4442 | |
91c2b899 AM |
4443 | bool is_iplt; |
4444 | Address plt_addr = this->plt_off(p, &is_iplt); | |
4445 | if (is_iplt) | |
4446 | plt_addr += this->targ_->iplt_section()->address(); | |
9e69ed50 | 4447 | else |
91c2b899 AM |
4448 | plt_addr += this->targ_->plt_section()->address(); |
4449 | Address got_addr = this->targ_->got_section()->output_section()->address(); | |
9e69ed50 AM |
4450 | const Powerpc_relobj<size, big_endian>* ppcobj = static_cast |
4451 | <const Powerpc_relobj<size, big_endian>*>(p->first.object_); | |
91c2b899 AM |
4452 | got_addr += ppcobj->toc_base_offset(); |
4453 | Address off = plt_addr - got_addr; | |
b4f7960d | 4454 | unsigned int bytes = 4 * 4 + 4 * (ha(off) != 0); |
34e0882b AM |
4455 | const Symbol* gsym = p->first.sym_; |
4456 | if (this->targ_->is_tls_get_addr_opt(gsym)) | |
4457 | bytes += 13 * 4; | |
b4f7960d AM |
4458 | if (this->targ_->abiversion() < 2) |
4459 | { | |
4460 | bool static_chain = parameters->options().plt_static_chain(); | |
4461 | bool thread_safe = this->targ_->plt_thread_safe(); | |
4462 | bytes += (4 | |
4463 | + 4 * static_chain | |
4464 | + 8 * thread_safe | |
4465 | + 4 * (ha(off + 8 + 8 * static_chain) != ha(off))); | |
4466 | } | |
34e0882b AM |
4467 | return bytes; |
4468 | } | |
4469 | ||
4470 | unsigned int | |
4471 | plt_call_align(unsigned int bytes) const | |
4472 | { | |
691d2e9a | 4473 | unsigned int align = param_plt_align<size>(); |
9e390558 | 4474 | return (bytes + align - 1) & -align; |
9e69ed50 | 4475 | } |
ec661b9d AM |
4476 | |
4477 | // Return long branch stub size. | |
4478 | unsigned int | |
590b87ff | 4479 | branch_stub_size(typename Branch_stub_entries::const_iterator p) |
ec661b9d | 4480 | { |
590b87ff AM |
4481 | Address loc = this->stub_address() + this->last_plt_size_ + p->second; |
4482 | if (p->first.dest_ - loc + (1 << 25) < 2 << 25) | |
ec661b9d | 4483 | return 4; |
9e390558 AM |
4484 | unsigned int bytes = 16; |
4485 | if (size == 32 && parameters->options().output_is_position_independent()) | |
4486 | bytes += 16; | |
4487 | return bytes; | |
ec661b9d AM |
4488 | } |
4489 | ||
4490 | // Write out stubs. | |
cf43a2fe AM |
4491 | void |
4492 | do_write(Output_file*); | |
4493 | ||
ec661b9d | 4494 | // Plt call stub keys. |
bdab445c | 4495 | class Plt_stub_key |
cf43a2fe | 4496 | { |
d1a8cabd | 4497 | public: |
bdab445c | 4498 | Plt_stub_key(const Symbol* sym) |
c9824451 AM |
4499 | : sym_(sym), object_(0), addend_(0), locsym_(0) |
4500 | { } | |
4501 | ||
bdab445c | 4502 | Plt_stub_key(const Sized_relobj_file<size, big_endian>* object, |
ec661b9d | 4503 | unsigned int locsym_index) |
c9824451 AM |
4504 | : sym_(NULL), object_(object), addend_(0), locsym_(locsym_index) |
4505 | { } | |
4506 | ||
bdab445c | 4507 | Plt_stub_key(const Sized_relobj_file<size, big_endian>* object, |
ec661b9d AM |
4508 | const Symbol* sym, |
4509 | unsigned int r_type, | |
4510 | Address addend) | |
e5d5f5ed | 4511 | : sym_(sym), object_(0), addend_(0), locsym_(0) |
cf43a2fe AM |
4512 | { |
4513 | if (size != 32) | |
ec661b9d | 4514 | this->addend_ = addend; |
d1a8cabd | 4515 | else if (parameters->options().output_is_position_independent() |
ec661b9d | 4516 | && r_type == elfcpp::R_PPC_PLTREL24) |
cf43a2fe | 4517 | { |
ec661b9d | 4518 | this->addend_ = addend; |
e5d5f5ed | 4519 | if (this->addend_ >= 32768) |
d1a8cabd | 4520 | this->object_ = object; |
cf43a2fe AM |
4521 | } |
4522 | } | |
4523 | ||
bdab445c | 4524 | Plt_stub_key(const Sized_relobj_file<size, big_endian>* object, |
ec661b9d AM |
4525 | unsigned int locsym_index, |
4526 | unsigned int r_type, | |
4527 | Address addend) | |
e5d5f5ed AM |
4528 | : sym_(NULL), object_(object), addend_(0), locsym_(locsym_index) |
4529 | { | |
4530 | if (size != 32) | |
ec661b9d | 4531 | this->addend_ = addend; |
e5d5f5ed | 4532 | else if (parameters->options().output_is_position_independent() |
ec661b9d AM |
4533 | && r_type == elfcpp::R_PPC_PLTREL24) |
4534 | this->addend_ = addend; | |
e5d5f5ed AM |
4535 | } |
4536 | ||
bdab445c | 4537 | bool operator==(const Plt_stub_key& that) const |
cf43a2fe AM |
4538 | { |
4539 | return (this->sym_ == that.sym_ | |
4540 | && this->object_ == that.object_ | |
e5d5f5ed AM |
4541 | && this->addend_ == that.addend_ |
4542 | && this->locsym_ == that.locsym_); | |
cf43a2fe | 4543 | } |
c9269dff AM |
4544 | |
4545 | const Symbol* sym_; | |
e5d5f5ed AM |
4546 | const Sized_relobj_file<size, big_endian>* object_; |
4547 | typename elfcpp::Elf_types<size>::Elf_Addr addend_; | |
4548 | unsigned int locsym_; | |
cf43a2fe AM |
4549 | }; |
4550 | ||
bdab445c | 4551 | class Plt_stub_key_hash |
cf43a2fe | 4552 | { |
d1a8cabd | 4553 | public: |
bdab445c | 4554 | size_t operator()(const Plt_stub_key& ent) const |
cf43a2fe AM |
4555 | { |
4556 | return (reinterpret_cast<uintptr_t>(ent.sym_) | |
4557 | ^ reinterpret_cast<uintptr_t>(ent.object_) | |
e5d5f5ed AM |
4558 | ^ ent.addend_ |
4559 | ^ ent.locsym_); | |
cf43a2fe | 4560 | } |
ec661b9d AM |
4561 | }; |
4562 | ||
4563 | // Long branch stub keys. | |
4564 | class Branch_stub_ent | |
4565 | { | |
4566 | public: | |
d49044c7 AM |
4567 | Branch_stub_ent(const Powerpc_relobj<size, big_endian>* obj, |
4568 | Address to, bool save_res) | |
4569 | : dest_(to), toc_base_off_(0), save_res_(save_res) | |
ec661b9d AM |
4570 | { |
4571 | if (size == 64) | |
4572 | toc_base_off_ = obj->toc_base_offset(); | |
4573 | } | |
4574 | ||
4575 | bool operator==(const Branch_stub_ent& that) const | |
4576 | { | |
4577 | return (this->dest_ == that.dest_ | |
4578 | && (size == 32 | |
4579 | || this->toc_base_off_ == that.toc_base_off_)); | |
4580 | } | |
cf43a2fe | 4581 | |
ec661b9d AM |
4582 | Address dest_; |
4583 | unsigned int toc_base_off_; | |
d49044c7 | 4584 | bool save_res_; |
ec661b9d | 4585 | }; |
cf43a2fe | 4586 | |
ec661b9d AM |
4587 | class Branch_stub_ent_hash |
4588 | { | |
4589 | public: | |
4590 | size_t operator()(const Branch_stub_ent& ent) const | |
4591 | { return ent.dest_ ^ ent.toc_base_off_; } | |
4592 | }; | |
cf43a2fe | 4593 | |
ec661b9d | 4594 | // In a sane world this would be a global. |
cf43a2fe | 4595 | Target_powerpc<size, big_endian>* targ_; |
ec661b9d | 4596 | // Map sym/object/addend to stub offset. |
ec661b9d AM |
4597 | Plt_stub_entries plt_call_stubs_; |
4598 | // Map destination address to stub offset. | |
ec661b9d AM |
4599 | Branch_stub_entries long_branch_stubs_; |
4600 | // size of input section | |
4601 | section_size_type orig_data_size_; | |
4602 | // size of stubs | |
9e69ed50 | 4603 | section_size_type plt_size_, last_plt_size_, branch_size_, last_branch_size_; |
6395d38b HS |
4604 | // Some rare cases cause (PR/20529) fluctuation in stub table |
4605 | // size, which leads to an endless relax loop. This is to be fixed | |
4606 | // by, after the first few iterations, allowing only increase of | |
4607 | // stub table size. This variable sets the minimal possible size of | |
4608 | // a stub table, it is zero for the first few iterations, then | |
4609 | // increases monotonically. | |
4610 | Address min_size_threshold_; | |
d49044c7 AM |
4611 | // Set if this stub group needs a copy of out-of-line register |
4612 | // save/restore functions. | |
4613 | bool need_save_res_; | |
590b87ff AM |
4614 | // Per stub table unique identifier. |
4615 | uint32_t uniq_; | |
34e0882b AM |
4616 | // The bctrl in the __tls_get_addr_opt stub, if present. |
4617 | unsigned int tls_get_addr_opt_bctrl_; | |
4618 | // FDE unwind info for this stub group. | |
4619 | unsigned int plt_fde_len_; | |
4620 | unsigned char plt_fde_[20]; | |
cf43a2fe AM |
4621 | }; |
4622 | ||
ec661b9d | 4623 | // Add a plt call stub, if we do not already have one for this |
d1a8cabd | 4624 | // sym/object/addend combo. |
cf43a2fe AM |
4625 | |
4626 | template<int size, bool big_endian> | |
a3e60ddb | 4627 | bool |
ec661b9d | 4628 | Stub_table<size, big_endian>::add_plt_call_entry( |
a3e60ddb | 4629 | Address from, |
c9824451 | 4630 | const Sized_relobj_file<size, big_endian>* object, |
d83ce4e3 | 4631 | const Symbol* gsym, |
ec661b9d | 4632 | unsigned int r_type, |
7e57d19e AM |
4633 | Address addend, |
4634 | bool tocsave) | |
cf43a2fe | 4635 | { |
bdab445c AM |
4636 | Plt_stub_key key(object, gsym, r_type, addend); |
4637 | Plt_stub_ent ent(this->plt_size_, this->plt_call_stubs_.size()); | |
9e69ed50 | 4638 | std::pair<typename Plt_stub_entries::iterator, bool> p |
bdab445c | 4639 | = this->plt_call_stubs_.insert(std::make_pair(key, ent)); |
9e69ed50 | 4640 | if (p.second) |
7ee7ff70 AM |
4641 | { |
4642 | this->plt_size_ = ent.off_ + this->plt_call_size(p.first); | |
4643 | if (size == 64 | |
4644 | && this->targ_->is_elfv2_localentry0(gsym)) | |
4645 | { | |
4646 | p.first->second.localentry0_ = 1; | |
4647 | this->targ_->set_has_localentry0(); | |
4648 | } | |
34e0882b AM |
4649 | if (this->targ_->is_tls_get_addr_opt(gsym)) |
4650 | { | |
4651 | this->targ_->set_has_tls_get_addr_opt(); | |
4652 | this->tls_get_addr_opt_bctrl_ = this->plt_size_ - 5 * 4; | |
4653 | } | |
4654 | this->plt_size_ = this->plt_call_align(this->plt_size_); | |
7ee7ff70 AM |
4655 | } |
4656 | if (size == 64 | |
4657 | && !tocsave | |
4658 | && !p.first->second.localentry0_) | |
7e57d19e | 4659 | p.first->second.r2save_ = 1; |
bdab445c | 4660 | return this->can_reach_stub(from, ent.off_, r_type); |
cf43a2fe AM |
4661 | } |
4662 | ||
e5d5f5ed | 4663 | template<int size, bool big_endian> |
a3e60ddb | 4664 | bool |
ec661b9d | 4665 | Stub_table<size, big_endian>::add_plt_call_entry( |
a3e60ddb | 4666 | Address from, |
c9824451 | 4667 | const Sized_relobj_file<size, big_endian>* object, |
e5d5f5ed | 4668 | unsigned int locsym_index, |
ec661b9d | 4669 | unsigned int r_type, |
7e57d19e AM |
4670 | Address addend, |
4671 | bool tocsave) | |
e5d5f5ed | 4672 | { |
bdab445c AM |
4673 | Plt_stub_key key(object, locsym_index, r_type, addend); |
4674 | Plt_stub_ent ent(this->plt_size_, this->plt_call_stubs_.size()); | |
9e69ed50 | 4675 | std::pair<typename Plt_stub_entries::iterator, bool> p |
bdab445c | 4676 | = this->plt_call_stubs_.insert(std::make_pair(key, ent)); |
9e69ed50 | 4677 | if (p.second) |
7ee7ff70 AM |
4678 | { |
4679 | this->plt_size_ = ent.off_ + this->plt_call_size(p.first); | |
34e0882b | 4680 | this->plt_size_ = this->plt_call_align(this->plt_size_); |
7ee7ff70 AM |
4681 | if (size == 64 |
4682 | && this->targ_->is_elfv2_localentry0(object, locsym_index)) | |
4683 | { | |
4684 | p.first->second.localentry0_ = 1; | |
4685 | this->targ_->set_has_localentry0(); | |
4686 | } | |
4687 | } | |
4688 | if (size == 64 | |
4689 | && !tocsave | |
4690 | && !p.first->second.localentry0_) | |
7e57d19e | 4691 | p.first->second.r2save_ = 1; |
bdab445c | 4692 | return this->can_reach_stub(from, ent.off_, r_type); |
e5d5f5ed AM |
4693 | } |
4694 | ||
ec661b9d AM |
4695 | // Find a plt call stub. |
4696 | ||
cf43a2fe | 4697 | template<int size, bool big_endian> |
7e57d19e | 4698 | const typename Stub_table<size, big_endian>::Plt_stub_ent* |
ec661b9d | 4699 | Stub_table<size, big_endian>::find_plt_call_entry( |
c9824451 | 4700 | const Sized_relobj_file<size, big_endian>* object, |
d83ce4e3 | 4701 | const Symbol* gsym, |
ec661b9d AM |
4702 | unsigned int r_type, |
4703 | Address addend) const | |
c9824451 | 4704 | { |
bdab445c AM |
4705 | Plt_stub_key key(object, gsym, r_type, addend); |
4706 | typename Plt_stub_entries::const_iterator p = this->plt_call_stubs_.find(key); | |
4707 | if (p == this->plt_call_stubs_.end()) | |
7e57d19e AM |
4708 | return NULL; |
4709 | return &p->second; | |
c9824451 AM |
4710 | } |
4711 | ||
4712 | template<int size, bool big_endian> | |
7e57d19e | 4713 | const typename Stub_table<size, big_endian>::Plt_stub_ent* |
ec661b9d | 4714 | Stub_table<size, big_endian>::find_plt_call_entry(const Symbol* gsym) const |
cf43a2fe | 4715 | { |
bdab445c AM |
4716 | Plt_stub_key key(gsym); |
4717 | typename Plt_stub_entries::const_iterator p = this->plt_call_stubs_.find(key); | |
7e57d19e AM |
4718 | if (p == this->plt_call_stubs_.end()) |
4719 | return NULL; | |
4720 | return &p->second; | |
cf43a2fe AM |
4721 | } |
4722 | ||
e5d5f5ed | 4723 | template<int size, bool big_endian> |
7e57d19e | 4724 | const typename Stub_table<size, big_endian>::Plt_stub_ent* |
ec661b9d | 4725 | Stub_table<size, big_endian>::find_plt_call_entry( |
c9824451 | 4726 | const Sized_relobj_file<size, big_endian>* object, |
e5d5f5ed | 4727 | unsigned int locsym_index, |
ec661b9d AM |
4728 | unsigned int r_type, |
4729 | Address addend) const | |
e5d5f5ed | 4730 | { |
bdab445c AM |
4731 | Plt_stub_key key(object, locsym_index, r_type, addend); |
4732 | typename Plt_stub_entries::const_iterator p = this->plt_call_stubs_.find(key); | |
4733 | if (p == this->plt_call_stubs_.end()) | |
7e57d19e AM |
4734 | return NULL; |
4735 | return &p->second; | |
c9824451 AM |
4736 | } |
4737 | ||
4738 | template<int size, bool big_endian> | |
7e57d19e | 4739 | const typename Stub_table<size, big_endian>::Plt_stub_ent* |
ec661b9d | 4740 | Stub_table<size, big_endian>::find_plt_call_entry( |
c9824451 AM |
4741 | const Sized_relobj_file<size, big_endian>* object, |
4742 | unsigned int locsym_index) const | |
4743 | { | |
bdab445c AM |
4744 | Plt_stub_key key(object, locsym_index); |
4745 | typename Plt_stub_entries::const_iterator p = this->plt_call_stubs_.find(key); | |
7e57d19e AM |
4746 | if (p == this->plt_call_stubs_.end()) |
4747 | return NULL; | |
4748 | return &p->second; | |
ec661b9d AM |
4749 | } |
4750 | ||
4751 | // Add a long branch stub if we don't already have one to given | |
4752 | // destination. | |
4753 | ||
4754 | template<int size, bool big_endian> | |
a3e60ddb | 4755 | bool |
ec661b9d AM |
4756 | Stub_table<size, big_endian>::add_long_branch_entry( |
4757 | const Powerpc_relobj<size, big_endian>* object, | |
a3e60ddb AM |
4758 | unsigned int r_type, |
4759 | Address from, | |
d49044c7 AM |
4760 | Address to, |
4761 | bool save_res) | |
ec661b9d | 4762 | { |
d49044c7 | 4763 | Branch_stub_ent ent(object, to, save_res); |
ec661b9d | 4764 | Address off = this->branch_size_; |
590b87ff AM |
4765 | std::pair<typename Branch_stub_entries::iterator, bool> p |
4766 | = this->long_branch_stubs_.insert(std::make_pair(ent, off)); | |
4767 | if (p.second) | |
ec661b9d | 4768 | { |
d49044c7 AM |
4769 | if (save_res) |
4770 | this->need_save_res_ = true; | |
4771 | else | |
4772 | { | |
590b87ff | 4773 | unsigned int stub_size = this->branch_stub_size(p.first); |
d49044c7 AM |
4774 | this->branch_size_ = off + stub_size; |
4775 | if (size == 64 && stub_size != 4) | |
4776 | this->targ_->add_branch_lookup_table(to); | |
4777 | } | |
ec661b9d | 4778 | } |
a3e60ddb | 4779 | return this->can_reach_stub(from, off, r_type); |
ec661b9d AM |
4780 | } |
4781 | ||
d49044c7 | 4782 | // Find long branch stub offset. |
ec661b9d AM |
4783 | |
4784 | template<int size, bool big_endian> | |
ec5b8187 | 4785 | typename Stub_table<size, big_endian>::Address |
ec661b9d AM |
4786 | Stub_table<size, big_endian>::find_long_branch_entry( |
4787 | const Powerpc_relobj<size, big_endian>* object, | |
9d5781f8 | 4788 | Address to) const |
ec661b9d | 4789 | { |
d49044c7 | 4790 | Branch_stub_ent ent(object, to, false); |
ec661b9d AM |
4791 | typename Branch_stub_entries::const_iterator p |
4792 | = this->long_branch_stubs_.find(ent); | |
d49044c7 AM |
4793 | if (p == this->long_branch_stubs_.end()) |
4794 | return invalid_address; | |
4795 | if (p->first.save_res_) | |
4796 | return to - this->targ_->savres_section()->address() + this->branch_size_; | |
4797 | return p->second; | |
e5d5f5ed AM |
4798 | } |
4799 | ||
34e0882b AM |
4800 | // Generate a suitable FDE to describe code in this stub group. |
4801 | // The __tls_get_addr_opt call stub needs to describe where it saves | |
4802 | // LR, to support exceptions that might be thrown from __tls_get_addr. | |
4803 | ||
4804 | template<int size, bool big_endian> | |
4805 | void | |
4806 | Stub_table<size, big_endian>::init_plt_fde() | |
4807 | { | |
4808 | unsigned char* p = this->plt_fde_; | |
4809 | // offset pcrel sdata4, size udata4, and augmentation size byte. | |
4810 | memset (p, 0, 9); | |
4811 | p += 9; | |
4812 | if (this->tls_get_addr_opt_bctrl_ != -1u) | |
4813 | { | |
4814 | unsigned int to_bctrl = this->tls_get_addr_opt_bctrl_ / 4; | |
4815 | if (to_bctrl < 64) | |
4816 | *p++ = elfcpp::DW_CFA_advance_loc + to_bctrl; | |
4817 | else if (to_bctrl < 256) | |
4818 | { | |
4819 | *p++ = elfcpp::DW_CFA_advance_loc1; | |
4820 | *p++ = to_bctrl; | |
4821 | } | |
4822 | else if (to_bctrl < 65536) | |
4823 | { | |
4824 | *p++ = elfcpp::DW_CFA_advance_loc2; | |
4825 | elfcpp::Swap<16, big_endian>::writeval(p, to_bctrl); | |
4826 | p += 2; | |
4827 | } | |
4828 | else | |
4829 | { | |
4830 | *p++ = elfcpp::DW_CFA_advance_loc4; | |
4831 | elfcpp::Swap<32, big_endian>::writeval(p, to_bctrl); | |
4832 | p += 4; | |
4833 | } | |
4834 | *p++ = elfcpp::DW_CFA_offset_extended_sf; | |
4835 | *p++ = 65; | |
4836 | *p++ = -(this->targ_->stk_linker() / 8) & 0x7f; | |
4837 | *p++ = elfcpp::DW_CFA_advance_loc + 4; | |
4838 | *p++ = elfcpp::DW_CFA_restore_extended; | |
4839 | *p++ = 65; | |
4840 | } | |
4841 | this->plt_fde_len_ = p - this->plt_fde_; | |
4842 | } | |
4843 | ||
4844 | // Add .eh_frame info for this stub section. Unlike other linker | |
4845 | // generated .eh_frame this is added late in the link, because we | |
4846 | // only want the .eh_frame info if this particular stub section is | |
4847 | // non-empty. | |
4848 | ||
4849 | template<int size, bool big_endian> | |
4850 | void | |
4851 | Stub_table<size, big_endian>::add_eh_frame(Layout* layout) | |
4852 | { | |
4853 | if (!parameters->options().ld_generated_unwind_info()) | |
4854 | return; | |
4855 | ||
4856 | // Since we add stub .eh_frame info late, it must be placed | |
4857 | // after all other linker generated .eh_frame info so that | |
4858 | // merge mapping need not be updated for input sections. | |
4859 | // There is no provision to use a different CIE to that used | |
4860 | // by .glink. | |
4861 | if (!this->targ_->has_glink()) | |
4862 | return; | |
4863 | ||
4864 | if (this->plt_size_ + this->branch_size_ + this->need_save_res_ == 0) | |
4865 | return; | |
4866 | ||
4867 | this->init_plt_fde(); | |
4868 | layout->add_eh_frame_for_plt(this, | |
4869 | Eh_cie<size>::eh_frame_cie, | |
4870 | sizeof (Eh_cie<size>::eh_frame_cie), | |
4871 | this->plt_fde_, this->plt_fde_len_); | |
4872 | } | |
4873 | ||
4874 | template<int size, bool big_endian> | |
4875 | void | |
4876 | Stub_table<size, big_endian>::remove_eh_frame(Layout* layout) | |
4877 | { | |
4878 | if (this->plt_fde_len_ != 0) | |
4879 | { | |
4880 | layout->remove_eh_frame_for_plt(this, | |
4881 | Eh_cie<size>::eh_frame_cie, | |
4882 | sizeof (Eh_cie<size>::eh_frame_cie), | |
4883 | this->plt_fde_, this->plt_fde_len_); | |
4884 | this->plt_fde_len_ = 0; | |
4885 | } | |
4886 | } | |
4887 | ||
ec661b9d AM |
4888 | // A class to handle .glink. |
4889 | ||
4890 | template<int size, bool big_endian> | |
4891 | class Output_data_glink : public Output_section_data | |
4892 | { | |
4893 | public: | |
9055360d AM |
4894 | typedef typename elfcpp::Elf_types<size>::Elf_Addr Address; |
4895 | static const Address invalid_address = static_cast<Address>(0) - 1; | |
ec661b9d AM |
4896 | |
4897 | Output_data_glink(Target_powerpc<size, big_endian>* targ) | |
9055360d AM |
4898 | : Output_section_data(16), targ_(targ), global_entry_stubs_(), |
4899 | end_branch_table_(), ge_size_(0) | |
ec661b9d AM |
4900 | { } |
4901 | ||
9d5781f8 | 4902 | void |
9055360d | 4903 | add_eh_frame(Layout* layout); |
9d5781f8 | 4904 | |
9055360d AM |
4905 | void |
4906 | add_global_entry(const Symbol*); | |
4907 | ||
4908 | Address | |
4909 | find_global_entry(const Symbol*) const; | |
4910 | ||
9e390558 AM |
4911 | unsigned int |
4912 | global_entry_align(unsigned int off) const | |
4913 | { | |
691d2e9a | 4914 | unsigned int align = param_plt_align<size>(); |
9e390558 AM |
4915 | return (off + align - 1) & -align; |
4916 | } | |
4917 | ||
4918 | unsigned int | |
4919 | global_entry_off() const | |
4920 | { | |
4921 | return this->global_entry_align(this->end_branch_table_); | |
4922 | } | |
4923 | ||
9055360d AM |
4924 | Address |
4925 | global_entry_address() const | |
4926 | { | |
4927 | gold_assert(this->is_data_size_valid()); | |
9e390558 AM |
4928 | return this->address() + this->global_entry_off(); |
4929 | } | |
4930 | ||
4931 | int | |
4932 | pltresolve_size() const | |
4933 | { | |
4934 | if (size == 64) | |
4935 | return (8 | |
407aa07c | 4936 | + (this->targ_->abiversion() < 2 ? 11 * 4 : 14 * 4)); |
9e390558 | 4937 | return 16 * 4; |
9d5781f8 AM |
4938 | } |
4939 | ||
ec661b9d AM |
4940 | protected: |
4941 | // Write to a map file. | |
4942 | void | |
4943 | do_print_to_mapfile(Mapfile* mapfile) const | |
4944 | { mapfile->print_output_data(this, _("** glink")); } | |
4945 | ||
4946 | private: | |
4947 | void | |
4948 | set_final_data_size(); | |
4949 | ||
4950 | // Write out .glink | |
4951 | void | |
4952 | do_write(Output_file*); | |
4953 | ||
4954 | // Allows access to .got and .plt for do_write. | |
4955 | Target_powerpc<size, big_endian>* targ_; | |
9055360d AM |
4956 | |
4957 | // Map sym to stub offset. | |
4958 | typedef Unordered_map<const Symbol*, unsigned int> Global_entry_stub_entries; | |
4959 | Global_entry_stub_entries global_entry_stubs_; | |
4960 | ||
4961 | unsigned int end_branch_table_, ge_size_; | |
ec661b9d AM |
4962 | }; |
4963 | ||
9055360d AM |
4964 | template<int size, bool big_endian> |
4965 | void | |
4966 | Output_data_glink<size, big_endian>::add_eh_frame(Layout* layout) | |
4967 | { | |
4968 | if (!parameters->options().ld_generated_unwind_info()) | |
4969 | return; | |
4970 | ||
4971 | if (size == 64) | |
4972 | { | |
4973 | if (this->targ_->abiversion() < 2) | |
4974 | layout->add_eh_frame_for_plt(this, | |
4975 | Eh_cie<64>::eh_frame_cie, | |
4976 | sizeof (Eh_cie<64>::eh_frame_cie), | |
4977 | glink_eh_frame_fde_64v1, | |
4978 | sizeof (glink_eh_frame_fde_64v1)); | |
4979 | else | |
4980 | layout->add_eh_frame_for_plt(this, | |
4981 | Eh_cie<64>::eh_frame_cie, | |
4982 | sizeof (Eh_cie<64>::eh_frame_cie), | |
4983 | glink_eh_frame_fde_64v2, | |
4984 | sizeof (glink_eh_frame_fde_64v2)); | |
4985 | } | |
4986 | else | |
4987 | { | |
4988 | // 32-bit .glink can use the default since the CIE return | |
4989 | // address reg, LR, is valid. | |
4990 | layout->add_eh_frame_for_plt(this, | |
4991 | Eh_cie<32>::eh_frame_cie, | |
4992 | sizeof (Eh_cie<32>::eh_frame_cie), | |
4993 | default_fde, | |
4994 | sizeof (default_fde)); | |
4995 | // Except where LR is used in a PIC __glink_PLTresolve. | |
4996 | if (parameters->options().output_is_position_independent()) | |
4997 | layout->add_eh_frame_for_plt(this, | |
4998 | Eh_cie<32>::eh_frame_cie, | |
4999 | sizeof (Eh_cie<32>::eh_frame_cie), | |
5000 | glink_eh_frame_fde_32, | |
5001 | sizeof (glink_eh_frame_fde_32)); | |
5002 | } | |
5003 | } | |
5004 | ||
5005 | template<int size, bool big_endian> | |
5006 | void | |
5007 | Output_data_glink<size, big_endian>::add_global_entry(const Symbol* gsym) | |
5008 | { | |
9e390558 | 5009 | unsigned int off = this->global_entry_align(this->ge_size_); |
9055360d | 5010 | std::pair<typename Global_entry_stub_entries::iterator, bool> p |
9e390558 | 5011 | = this->global_entry_stubs_.insert(std::make_pair(gsym, off)); |
9055360d | 5012 | if (p.second) |
407aa07c | 5013 | this->ge_size_ = off + 16; |
9055360d AM |
5014 | } |
5015 | ||
5016 | template<int size, bool big_endian> | |
5017 | typename Output_data_glink<size, big_endian>::Address | |
5018 | Output_data_glink<size, big_endian>::find_global_entry(const Symbol* gsym) const | |
5019 | { | |
5020 | typename Global_entry_stub_entries::const_iterator p | |
5021 | = this->global_entry_stubs_.find(gsym); | |
5022 | return p == this->global_entry_stubs_.end() ? invalid_address : p->second; | |
5023 | } | |
5024 | ||
cf43a2fe AM |
5025 | template<int size, bool big_endian> |
5026 | void | |
5027 | Output_data_glink<size, big_endian>::set_final_data_size() | |
5028 | { | |
ec661b9d AM |
5029 | unsigned int count = this->targ_->plt_entry_count(); |
5030 | section_size_type total = 0; | |
cf43a2fe AM |
5031 | |
5032 | if (count != 0) | |
5033 | { | |
5034 | if (size == 32) | |
5035 | { | |
cf43a2fe AM |
5036 | // space for branch table |
5037 | total += 4 * (count - 1); | |
5038 | ||
5039 | total += -total & 15; | |
9e390558 | 5040 | total += this->pltresolve_size(); |
cf43a2fe AM |
5041 | } |
5042 | else | |
5043 | { | |
9e390558 | 5044 | total += this->pltresolve_size(); |
cf43a2fe AM |
5045 | |
5046 | // space for branch table | |
b4f7960d AM |
5047 | total += 4 * count; |
5048 | if (this->targ_->abiversion() < 2) | |
5049 | { | |
5050 | total += 4 * count; | |
5051 | if (count > 0x8000) | |
5052 | total += 4 * (count - 0x8000); | |
5053 | } | |
cf43a2fe AM |
5054 | } |
5055 | } | |
9055360d | 5056 | this->end_branch_table_ = total; |
9e390558 | 5057 | total = this->global_entry_align(total); |
9055360d | 5058 | total += this->ge_size_; |
cf43a2fe AM |
5059 | |
5060 | this->set_data_size(total); | |
5061 | } | |
5062 | ||
590b87ff AM |
5063 | // Define symbols on stubs, identifying the stub. |
5064 | ||
5065 | template<int size, bool big_endian> | |
5066 | void | |
5067 | Stub_table<size, big_endian>::define_stub_syms(Symbol_table* symtab) | |
5068 | { | |
5069 | if (!this->plt_call_stubs_.empty()) | |
5070 | { | |
5071 | // The key for the plt call stub hash table includes addresses, | |
5072 | // therefore traversal order depends on those addresses, which | |
5073 | // can change between runs if gold is a PIE. Unfortunately the | |
5074 | // output .symtab ordering depends on the order in which symbols | |
5075 | // are added to the linker symtab. We want reproducible output | |
5076 | // so must sort the call stub symbols. | |
5077 | typedef typename Plt_stub_entries::const_iterator plt_iter; | |
5078 | std::vector<plt_iter> sorted; | |
5079 | sorted.resize(this->plt_call_stubs_.size()); | |
5080 | ||
5081 | for (plt_iter cs = this->plt_call_stubs_.begin(); | |
5082 | cs != this->plt_call_stubs_.end(); | |
5083 | ++cs) | |
bdab445c | 5084 | sorted[cs->second.indx_] = cs; |
590b87ff AM |
5085 | |
5086 | for (unsigned int i = 0; i < this->plt_call_stubs_.size(); ++i) | |
5087 | { | |
5088 | plt_iter cs = sorted[i]; | |
5089 | char add[10]; | |
5090 | add[0] = 0; | |
5091 | if (cs->first.addend_ != 0) | |
5092 | sprintf(add, "+%x", static_cast<uint32_t>(cs->first.addend_)); | |
94de2a2c JC |
5093 | char obj[10]; |
5094 | obj[0] = 0; | |
5095 | if (cs->first.object_) | |
590b87ff AM |
5096 | { |
5097 | const Powerpc_relobj<size, big_endian>* ppcobj = static_cast | |
5098 | <const Powerpc_relobj<size, big_endian>*>(cs->first.object_); | |
94de2a2c JC |
5099 | sprintf(obj, "%x:", ppcobj->uniq()); |
5100 | } | |
5101 | char localname[9]; | |
5102 | const char *symname; | |
5103 | if (cs->first.sym_ == NULL) | |
5104 | { | |
5105 | sprintf(localname, "%x", cs->first.locsym_); | |
590b87ff AM |
5106 | symname = localname; |
5107 | } | |
34e0882b AM |
5108 | else if (this->targ_->is_tls_get_addr_opt(cs->first.sym_)) |
5109 | symname = this->targ_->tls_get_addr_opt()->name(); | |
590b87ff AM |
5110 | else |
5111 | symname = cs->first.sym_->name(); | |
94de2a2c JC |
5112 | char* name = new char[8 + 10 + strlen(obj) + strlen(symname) + strlen(add) + 1]; |
5113 | sprintf(name, "%08x.plt_call.%s%s%s", this->uniq_, obj, symname, add); | |
bdab445c AM |
5114 | Address value |
5115 | = this->stub_address() - this->address() + cs->second.off_; | |
34e0882b | 5116 | unsigned int stub_size = this->plt_call_align(this->plt_call_size(cs)); |
590b87ff AM |
5117 | this->targ_->define_local(symtab, name, this, value, stub_size); |
5118 | } | |
5119 | } | |
5120 | ||
5121 | typedef typename Branch_stub_entries::const_iterator branch_iter; | |
5122 | for (branch_iter bs = this->long_branch_stubs_.begin(); | |
5123 | bs != this->long_branch_stubs_.end(); | |
5124 | ++bs) | |
5125 | { | |
5126 | if (bs->first.save_res_) | |
5127 | continue; | |
5128 | ||
5129 | char* name = new char[8 + 13 + 16 + 1]; | |
5130 | sprintf(name, "%08x.long_branch.%llx", this->uniq_, | |
5131 | static_cast<unsigned long long>(bs->first.dest_)); | |
5132 | Address value = (this->stub_address() - this->address() | |
5133 | + this->plt_size_ + bs->second); | |
5134 | unsigned int stub_size = this->branch_stub_size(bs); | |
5135 | this->targ_->define_local(symtab, name, this, value, stub_size); | |
5136 | } | |
5137 | } | |
5138 | ||
ec661b9d | 5139 | // Write out plt and long branch stub code. |
cf43a2fe AM |
5140 | |
5141 | template<int size, bool big_endian> | |
5142 | void | |
ec661b9d | 5143 | Stub_table<size, big_endian>::do_write(Output_file* of) |
cf43a2fe | 5144 | { |
ec661b9d AM |
5145 | if (this->plt_call_stubs_.empty() |
5146 | && this->long_branch_stubs_.empty()) | |
5147 | return; | |
5148 | ||
5149 | const section_size_type start_off = this->offset(); | |
5150 | const section_size_type off = this->stub_offset(); | |
42cacb20 | 5151 | const section_size_type oview_size = |
ec661b9d | 5152 | convert_to_section_size_type(this->data_size() - (off - start_off)); |
cf43a2fe | 5153 | unsigned char* const oview = of->get_output_view(off, oview_size); |
c9269dff | 5154 | unsigned char* p; |
42cacb20 | 5155 | |
cf43a2fe AM |
5156 | if (size == 64) |
5157 | { | |
ec661b9d AM |
5158 | const Output_data_got_powerpc<size, big_endian>* got |
5159 | = this->targ_->got_section(); | |
dd93cd0a | 5160 | Address got_os_addr = got->output_section()->address(); |
c9269dff | 5161 | |
ec661b9d | 5162 | if (!this->plt_call_stubs_.empty()) |
cf43a2fe | 5163 | { |
ec661b9d AM |
5164 | // The base address of the .plt section. |
5165 | Address plt_base = this->targ_->plt_section()->address(); | |
5166 | Address iplt_base = invalid_address; | |
5167 | ||
5168 | // Write out plt call stubs. | |
5169 | typename Plt_stub_entries::const_iterator cs; | |
5170 | for (cs = this->plt_call_stubs_.begin(); | |
5171 | cs != this->plt_call_stubs_.end(); | |
5172 | ++cs) | |
e5d5f5ed | 5173 | { |
91c2b899 AM |
5174 | bool is_iplt; |
5175 | Address pltoff = this->plt_off(cs, &is_iplt); | |
9e69ed50 | 5176 | Address plt_addr = pltoff; |
91c2b899 | 5177 | if (is_iplt) |
ec661b9d AM |
5178 | { |
5179 | if (iplt_base == invalid_address) | |
5180 | iplt_base = this->targ_->iplt_section()->address(); | |
5181 | plt_addr += iplt_base; | |
5182 | } | |
5183 | else | |
5184 | plt_addr += plt_base; | |
5185 | const Powerpc_relobj<size, big_endian>* ppcobj = static_cast | |
5186 | <const Powerpc_relobj<size, big_endian>*>(cs->first.object_); | |
5187 | Address got_addr = got_os_addr + ppcobj->toc_base_offset(); | |
9e69ed50 | 5188 | Address off = plt_addr - got_addr; |
ec661b9d | 5189 | |
9e69ed50 | 5190 | if (off + 0x80008000 > 0xffffffff || (off & 7) != 0) |
ec661b9d AM |
5191 | gold_error(_("%s: linkage table error against `%s'"), |
5192 | cs->first.object_->name().c_str(), | |
5193 | cs->first.sym_->demangled_name().c_str()); | |
5194 | ||
b4f7960d AM |
5195 | bool plt_load_toc = this->targ_->abiversion() < 2; |
5196 | bool static_chain | |
5197 | = plt_load_toc && parameters->options().plt_static_chain(); | |
5198 | bool thread_safe | |
5199 | = plt_load_toc && this->targ_->plt_thread_safe(); | |
9e69ed50 AM |
5200 | bool use_fake_dep = false; |
5201 | Address cmp_branch_off = 0; | |
407aa07c | 5202 | if (thread_safe) |
9e69ed50 AM |
5203 | { |
5204 | unsigned int pltindex | |
5205 | = ((pltoff - this->targ_->first_plt_entry_offset()) | |
5206 | / this->targ_->plt_entry_size()); | |
5207 | Address glinkoff | |
9e390558 | 5208 | = (this->targ_->glink_section()->pltresolve_size() |
9e69ed50 AM |
5209 | + pltindex * 8); |
5210 | if (pltindex > 32768) | |
5211 | glinkoff += (pltindex - 32768) * 4; | |
5212 | Address to | |
5213 | = this->targ_->glink_section()->address() + glinkoff; | |
5214 | Address from | |
7e57d19e AM |
5215 | = (this->stub_address() + cs->second.off_ + 20 |
5216 | + 4 * cs->second.r2save_ | |
9e69ed50 AM |
5217 | + 4 * (ha(off) != 0) |
5218 | + 4 * (ha(off + 8 + 8 * static_chain) != ha(off)) | |
5219 | + 4 * static_chain); | |
5220 | cmp_branch_off = to - from; | |
5221 | use_fake_dep = cmp_branch_off + (1 << 25) >= (1 << 26); | |
5222 | } | |
5223 | ||
bdab445c | 5224 | p = oview + cs->second.off_; |
34e0882b AM |
5225 | const Symbol* gsym = cs->first.sym_; |
5226 | if (this->targ_->is_tls_get_addr_opt(gsym)) | |
5227 | { | |
5228 | write_insn<big_endian>(p, ld_11_3 + 0); | |
5229 | p += 4; | |
5230 | write_insn<big_endian>(p, ld_12_3 + 8); | |
5231 | p += 4; | |
5232 | write_insn<big_endian>(p, mr_0_3); | |
5233 | p += 4; | |
5234 | write_insn<big_endian>(p, cmpdi_11_0); | |
5235 | p += 4; | |
5236 | write_insn<big_endian>(p, add_3_12_13); | |
5237 | p += 4; | |
5238 | write_insn<big_endian>(p, beqlr); | |
5239 | p += 4; | |
5240 | write_insn<big_endian>(p, mr_3_0); | |
5241 | p += 4; | |
5242 | if (!cs->second.localentry0_) | |
5243 | { | |
5244 | write_insn<big_endian>(p, mflr_11); | |
5245 | p += 4; | |
5246 | write_insn<big_endian>(p, (std_11_1 | |
5247 | + this->targ_->stk_linker())); | |
5248 | p += 4; | |
5249 | } | |
407aa07c | 5250 | use_fake_dep = thread_safe; |
34e0882b | 5251 | } |
9e69ed50 | 5252 | if (ha(off) != 0) |
ec661b9d | 5253 | { |
7e57d19e AM |
5254 | if (cs->second.r2save_) |
5255 | { | |
5256 | write_insn<big_endian>(p, | |
5257 | std_2_1 + this->targ_->stk_toc()); | |
5258 | p += 4; | |
5259 | } | |
397998fc AM |
5260 | if (plt_load_toc) |
5261 | { | |
5262 | write_insn<big_endian>(p, addis_11_2 + ha(off)); | |
5263 | p += 4; | |
5264 | write_insn<big_endian>(p, ld_12_11 + l(off)); | |
5265 | p += 4; | |
5266 | } | |
5267 | else | |
5268 | { | |
5269 | write_insn<big_endian>(p, addis_12_2 + ha(off)); | |
5270 | p += 4; | |
5271 | write_insn<big_endian>(p, ld_12_12 + l(off)); | |
5272 | p += 4; | |
5273 | } | |
b4f7960d AM |
5274 | if (plt_load_toc |
5275 | && ha(off + 8 + 8 * static_chain) != ha(off)) | |
ec661b9d | 5276 | { |
b4f7960d AM |
5277 | write_insn<big_endian>(p, addi_11_11 + l(off)); |
5278 | p += 4; | |
9e69ed50 | 5279 | off = 0; |
ec661b9d | 5280 | } |
b4f7960d AM |
5281 | write_insn<big_endian>(p, mtctr_12); |
5282 | p += 4; | |
5283 | if (plt_load_toc) | |
9e69ed50 | 5284 | { |
b4f7960d AM |
5285 | if (use_fake_dep) |
5286 | { | |
5287 | write_insn<big_endian>(p, xor_2_12_12); | |
5288 | p += 4; | |
5289 | write_insn<big_endian>(p, add_11_11_2); | |
5290 | p += 4; | |
5291 | } | |
5292 | write_insn<big_endian>(p, ld_2_11 + l(off + 8)); | |
5293 | p += 4; | |
5294 | if (static_chain) | |
5295 | { | |
5296 | write_insn<big_endian>(p, ld_11_11 + l(off + 16)); | |
5297 | p += 4; | |
5298 | } | |
9e69ed50 | 5299 | } |
ec661b9d AM |
5300 | } |
5301 | else | |
5302 | { | |
7e57d19e AM |
5303 | if (cs->second.r2save_) |
5304 | { | |
5305 | write_insn<big_endian>(p, | |
5306 | std_2_1 + this->targ_->stk_toc()); | |
5307 | p += 4; | |
5308 | } | |
b4f7960d AM |
5309 | write_insn<big_endian>(p, ld_12_2 + l(off)); |
5310 | p += 4; | |
5311 | if (plt_load_toc | |
5312 | && ha(off + 8 + 8 * static_chain) != ha(off)) | |
ec661b9d | 5313 | { |
b4f7960d AM |
5314 | write_insn<big_endian>(p, addi_2_2 + l(off)); |
5315 | p += 4; | |
9e69ed50 | 5316 | off = 0; |
ec661b9d | 5317 | } |
b4f7960d AM |
5318 | write_insn<big_endian>(p, mtctr_12); |
5319 | p += 4; | |
5320 | if (plt_load_toc) | |
9e69ed50 | 5321 | { |
b4f7960d AM |
5322 | if (use_fake_dep) |
5323 | { | |
5324 | write_insn<big_endian>(p, xor_11_12_12); | |
5325 | p += 4; | |
5326 | write_insn<big_endian>(p, add_2_2_11); | |
5327 | p += 4; | |
5328 | } | |
5329 | if (static_chain) | |
5330 | { | |
5331 | write_insn<big_endian>(p, ld_11_2 + l(off + 16)); | |
5332 | p += 4; | |
5333 | } | |
5334 | write_insn<big_endian>(p, ld_2_2 + l(off + 8)); | |
5335 | p += 4; | |
9e69ed50 | 5336 | } |
ec661b9d | 5337 | } |
34e0882b AM |
5338 | if (!cs->second.localentry0_ |
5339 | && this->targ_->is_tls_get_addr_opt(gsym)) | |
5340 | { | |
407aa07c | 5341 | write_insn<big_endian>(p, bctrl); |
34e0882b AM |
5342 | p += 4; |
5343 | write_insn<big_endian>(p, ld_2_1 + this->targ_->stk_toc()); | |
5344 | p += 4; | |
5345 | write_insn<big_endian>(p, ld_11_1 + this->targ_->stk_linker()); | |
5346 | p += 4; | |
5347 | write_insn<big_endian>(p, mtlr_11); | |
5348 | p += 4; | |
5349 | write_insn<big_endian>(p, blr); | |
5350 | } | |
5351 | else if (thread_safe && !use_fake_dep) | |
9e69ed50 | 5352 | { |
b4f7960d AM |
5353 | write_insn<big_endian>(p, cmpldi_2_0); |
5354 | p += 4; | |
5355 | write_insn<big_endian>(p, bnectr_p4); | |
5356 | p += 4; | |
9e69ed50 AM |
5357 | write_insn<big_endian>(p, b | (cmp_branch_off & 0x3fffffc)); |
5358 | } | |
5359 | else | |
407aa07c | 5360 | write_insn<big_endian>(p, bctr); |
e5d5f5ed | 5361 | } |
ec661b9d AM |
5362 | } |
5363 | ||
5364 | // Write out long branch stubs. | |
5365 | typename Branch_stub_entries::const_iterator bs; | |
5366 | for (bs = this->long_branch_stubs_.begin(); | |
5367 | bs != this->long_branch_stubs_.end(); | |
5368 | ++bs) | |
5369 | { | |
d49044c7 AM |
5370 | if (bs->first.save_res_) |
5371 | continue; | |
ec661b9d AM |
5372 | p = oview + this->plt_size_ + bs->second; |
5373 | Address loc = this->stub_address() + this->plt_size_ + bs->second; | |
5374 | Address delta = bs->first.dest_ - loc; | |
5375 | if (delta + (1 << 25) < 2 << 25) | |
5376 | write_insn<big_endian>(p, b | (delta & 0x3fffffc)); | |
e5d5f5ed | 5377 | else |
cf43a2fe | 5378 | { |
ec661b9d AM |
5379 | Address brlt_addr |
5380 | = this->targ_->find_branch_lookup_table(bs->first.dest_); | |
5381 | gold_assert(brlt_addr != invalid_address); | |
5382 | brlt_addr += this->targ_->brlt_section()->address(); | |
5383 | Address got_addr = got_os_addr + bs->first.toc_base_off_; | |
5384 | Address brltoff = brlt_addr - got_addr; | |
5385 | if (ha(brltoff) == 0) | |
5386 | { | |
b4f7960d | 5387 | write_insn<big_endian>(p, ld_12_2 + l(brltoff)), p += 4; |
ec661b9d AM |
5388 | } |
5389 | else | |
cf43a2fe | 5390 | { |
397998fc AM |
5391 | write_insn<big_endian>(p, addis_12_2 + ha(brltoff)), p += 4; |
5392 | write_insn<big_endian>(p, ld_12_12 + l(brltoff)), p += 4; | |
cf43a2fe | 5393 | } |
b4f7960d | 5394 | write_insn<big_endian>(p, mtctr_12), p += 4; |
407aa07c | 5395 | write_insn<big_endian>(p, bctr); |
cf43a2fe | 5396 | } |
ec661b9d AM |
5397 | } |
5398 | } | |
5399 | else | |
5400 | { | |
5401 | if (!this->plt_call_stubs_.empty()) | |
5402 | { | |
5403 | // The base address of the .plt section. | |
5404 | Address plt_base = this->targ_->plt_section()->address(); | |
5405 | Address iplt_base = invalid_address; | |
5406 | // The address of _GLOBAL_OFFSET_TABLE_. | |
5407 | Address g_o_t = invalid_address; | |
5408 | ||
5409 | // Write out plt call stubs. | |
5410 | typename Plt_stub_entries::const_iterator cs; | |
5411 | for (cs = this->plt_call_stubs_.begin(); | |
5412 | cs != this->plt_call_stubs_.end(); | |
5413 | ++cs) | |
cf43a2fe | 5414 | { |
91c2b899 AM |
5415 | bool is_iplt; |
5416 | Address plt_addr = this->plt_off(cs, &is_iplt); | |
5417 | if (is_iplt) | |
ec661b9d AM |
5418 | { |
5419 | if (iplt_base == invalid_address) | |
5420 | iplt_base = this->targ_->iplt_section()->address(); | |
5421 | plt_addr += iplt_base; | |
5422 | } | |
5423 | else | |
5424 | plt_addr += plt_base; | |
5425 | ||
bdab445c | 5426 | p = oview + cs->second.off_; |
34e0882b AM |
5427 | const Symbol* gsym = cs->first.sym_; |
5428 | if (this->targ_->is_tls_get_addr_opt(gsym)) | |
5429 | { | |
5430 | write_insn<big_endian>(p, lwz_11_3 + 0); | |
5431 | p += 4; | |
5432 | write_insn<big_endian>(p, lwz_12_3 + 4); | |
5433 | p += 4; | |
5434 | write_insn<big_endian>(p, mr_0_3); | |
5435 | p += 4; | |
5436 | write_insn<big_endian>(p, cmpwi_11_0); | |
5437 | p += 4; | |
5438 | write_insn<big_endian>(p, add_3_12_2); | |
5439 | p += 4; | |
5440 | write_insn<big_endian>(p, beqlr); | |
5441 | p += 4; | |
5442 | write_insn<big_endian>(p, mr_3_0); | |
5443 | p += 4; | |
5444 | write_insn<big_endian>(p, nop); | |
5445 | p += 4; | |
5446 | } | |
ec661b9d AM |
5447 | if (parameters->options().output_is_position_independent()) |
5448 | { | |
5449 | Address got_addr; | |
5450 | const Powerpc_relobj<size, big_endian>* ppcobj | |
5451 | = (static_cast<const Powerpc_relobj<size, big_endian>*> | |
5452 | (cs->first.object_)); | |
5453 | if (ppcobj != NULL && cs->first.addend_ >= 32768) | |
5454 | { | |
5455 | unsigned int got2 = ppcobj->got2_shndx(); | |
5456 | got_addr = ppcobj->get_output_section_offset(got2); | |
5457 | gold_assert(got_addr != invalid_address); | |
5458 | got_addr += (ppcobj->output_section(got2)->address() | |
5459 | + cs->first.addend_); | |
5460 | } | |
5461 | else | |
5462 | { | |
5463 | if (g_o_t == invalid_address) | |
5464 | { | |
5465 | const Output_data_got_powerpc<size, big_endian>* got | |
5466 | = this->targ_->got_section(); | |
5467 | g_o_t = got->address() + got->g_o_t(); | |
5468 | } | |
5469 | got_addr = g_o_t; | |
5470 | } | |
5471 | ||
9e69ed50 AM |
5472 | Address off = plt_addr - got_addr; |
5473 | if (ha(off) == 0) | |
9e390558 | 5474 | write_insn<big_endian>(p, lwz_11_30 + l(off)); |
ec661b9d AM |
5475 | else |
5476 | { | |
9e390558 AM |
5477 | write_insn<big_endian>(p, addis_11_30 + ha(off)); |
5478 | p += 4; | |
5479 | write_insn<big_endian>(p, lwz_11_11 + l(off)); | |
ec661b9d AM |
5480 | } |
5481 | } | |
5482 | else | |
5483 | { | |
9e390558 AM |
5484 | write_insn<big_endian>(p, lis_11 + ha(plt_addr)); |
5485 | p += 4; | |
5486 | write_insn<big_endian>(p, lwz_11_11 + l(plt_addr)); | |
ec661b9d | 5487 | } |
9e390558 AM |
5488 | p += 4; |
5489 | write_insn<big_endian>(p, mtctr_11); | |
5490 | p += 4; | |
407aa07c | 5491 | write_insn<big_endian>(p, bctr); |
ec661b9d AM |
5492 | } |
5493 | } | |
5494 | ||
5495 | // Write out long branch stubs. | |
5496 | typename Branch_stub_entries::const_iterator bs; | |
5497 | for (bs = this->long_branch_stubs_.begin(); | |
5498 | bs != this->long_branch_stubs_.end(); | |
5499 | ++bs) | |
5500 | { | |
d49044c7 AM |
5501 | if (bs->first.save_res_) |
5502 | continue; | |
ec661b9d AM |
5503 | p = oview + this->plt_size_ + bs->second; |
5504 | Address loc = this->stub_address() + this->plt_size_ + bs->second; | |
5505 | Address delta = bs->first.dest_ - loc; | |
5506 | if (delta + (1 << 25) < 2 << 25) | |
5507 | write_insn<big_endian>(p, b | (delta & 0x3fffffc)); | |
5508 | else if (!parameters->options().output_is_position_independent()) | |
5509 | { | |
9e390558 AM |
5510 | write_insn<big_endian>(p, lis_12 + ha(bs->first.dest_)); |
5511 | p += 4; | |
5512 | write_insn<big_endian>(p, addi_12_12 + l(bs->first.dest_)); | |
ec661b9d AM |
5513 | } |
5514 | else | |
5515 | { | |
5516 | delta -= 8; | |
9e390558 AM |
5517 | write_insn<big_endian>(p, mflr_0); |
5518 | p += 4; | |
5519 | write_insn<big_endian>(p, bcl_20_31); | |
5520 | p += 4; | |
5521 | write_insn<big_endian>(p, mflr_12); | |
5522 | p += 4; | |
5523 | write_insn<big_endian>(p, addis_12_12 + ha(delta)); | |
5524 | p += 4; | |
5525 | write_insn<big_endian>(p, addi_12_12 + l(delta)); | |
5526 | p += 4; | |
5527 | write_insn<big_endian>(p, mtlr_0); | |
cf43a2fe | 5528 | } |
9e390558 AM |
5529 | p += 4; |
5530 | write_insn<big_endian>(p, mtctr_12); | |
5531 | p += 4; | |
407aa07c | 5532 | write_insn<big_endian>(p, bctr); |
cf43a2fe | 5533 | } |
ec661b9d | 5534 | } |
d49044c7 AM |
5535 | if (this->need_save_res_) |
5536 | { | |
5537 | p = oview + this->plt_size_ + this->branch_size_; | |
5538 | memcpy (p, this->targ_->savres_section()->contents(), | |
5539 | this->targ_->savres_section()->data_size()); | |
5540 | } | |
ec661b9d AM |
5541 | } |
5542 | ||
5543 | // Write out .glink. | |
5544 | ||
5545 | template<int size, bool big_endian> | |
5546 | void | |
5547 | Output_data_glink<size, big_endian>::do_write(Output_file* of) | |
5548 | { | |
5549 | const section_size_type off = this->offset(); | |
5550 | const section_size_type oview_size = | |
5551 | convert_to_section_size_type(this->data_size()); | |
5552 | unsigned char* const oview = of->get_output_view(off, oview_size); | |
5553 | unsigned char* p; | |
5554 | ||
5555 | // The base address of the .plt section. | |
5556 | typedef typename elfcpp::Elf_types<size>::Elf_Addr Address; | |
5557 | Address plt_base = this->targ_->plt_section()->address(); | |
cf43a2fe | 5558 | |
ec661b9d AM |
5559 | if (size == 64) |
5560 | { | |
9055360d | 5561 | if (this->end_branch_table_ != 0) |
b4f7960d | 5562 | { |
9055360d AM |
5563 | // Write pltresolve stub. |
5564 | p = oview; | |
5565 | Address after_bcl = this->address() + 16; | |
5566 | Address pltoff = plt_base - after_bcl; | |
5567 | ||
5568 | elfcpp::Swap<64, big_endian>::writeval(p, pltoff), p += 8; | |
cf43a2fe | 5569 | |
b4f7960d | 5570 | if (this->targ_->abiversion() < 2) |
cf43a2fe | 5571 | { |
9055360d AM |
5572 | write_insn<big_endian>(p, mflr_12), p += 4; |
5573 | write_insn<big_endian>(p, bcl_20_31), p += 4; | |
5574 | write_insn<big_endian>(p, mflr_11), p += 4; | |
5575 | write_insn<big_endian>(p, ld_2_11 + l(-16)), p += 4; | |
5576 | write_insn<big_endian>(p, mtlr_12), p += 4; | |
5577 | write_insn<big_endian>(p, add_11_2_11), p += 4; | |
5578 | write_insn<big_endian>(p, ld_12_11 + 0), p += 4; | |
5579 | write_insn<big_endian>(p, ld_2_11 + 8), p += 4; | |
5580 | write_insn<big_endian>(p, mtctr_12), p += 4; | |
5581 | write_insn<big_endian>(p, ld_11_11 + 16), p += 4; | |
5582 | } | |
5583 | else | |
5584 | { | |
5585 | write_insn<big_endian>(p, mflr_0), p += 4; | |
5586 | write_insn<big_endian>(p, bcl_20_31), p += 4; | |
5587 | write_insn<big_endian>(p, mflr_11), p += 4; | |
7ee7ff70 | 5588 | write_insn<big_endian>(p, std_2_1 + 24), p += 4; |
9055360d AM |
5589 | write_insn<big_endian>(p, ld_2_11 + l(-16)), p += 4; |
5590 | write_insn<big_endian>(p, mtlr_0), p += 4; | |
5591 | write_insn<big_endian>(p, sub_12_12_11), p += 4; | |
5592 | write_insn<big_endian>(p, add_11_2_11), p += 4; | |
5593 | write_insn<big_endian>(p, addi_0_12 + l(-48)), p += 4; | |
5594 | write_insn<big_endian>(p, ld_12_11 + 0), p += 4; | |
5595 | write_insn<big_endian>(p, srdi_0_0_2), p += 4; | |
5596 | write_insn<big_endian>(p, mtctr_12), p += 4; | |
5597 | write_insn<big_endian>(p, ld_11_11 + 8), p += 4; | |
5598 | } | |
407aa07c | 5599 | write_insn<big_endian>(p, bctr), p += 4; |
9e390558 | 5600 | gold_assert(p == oview + this->pltresolve_size()); |
9055360d AM |
5601 | |
5602 | // Write lazy link call stubs. | |
5603 | uint32_t indx = 0; | |
5604 | while (p < oview + this->end_branch_table_) | |
5605 | { | |
5606 | if (this->targ_->abiversion() < 2) | |
b4f7960d | 5607 | { |
9055360d AM |
5608 | if (indx < 0x8000) |
5609 | { | |
5610 | write_insn<big_endian>(p, li_0_0 + indx), p += 4; | |
5611 | } | |
5612 | else | |
5613 | { | |
bbec1a5d | 5614 | write_insn<big_endian>(p, lis_0 + hi(indx)), p += 4; |
9055360d AM |
5615 | write_insn<big_endian>(p, ori_0_0_0 + l(indx)), p += 4; |
5616 | } | |
b4f7960d | 5617 | } |
9055360d AM |
5618 | uint32_t branch_off = 8 - (p - oview); |
5619 | write_insn<big_endian>(p, b + (branch_off & 0x3fffffc)), p += 4; | |
5620 | indx++; | |
cf43a2fe | 5621 | } |
9055360d AM |
5622 | } |
5623 | ||
5624 | Address plt_base = this->targ_->plt_section()->address(); | |
5625 | Address iplt_base = invalid_address; | |
9e390558 | 5626 | unsigned int global_entry_off = this->global_entry_off(); |
9055360d AM |
5627 | Address global_entry_base = this->address() + global_entry_off; |
5628 | typename Global_entry_stub_entries::const_iterator ge; | |
5629 | for (ge = this->global_entry_stubs_.begin(); | |
5630 | ge != this->global_entry_stubs_.end(); | |
5631 | ++ge) | |
5632 | { | |
5633 | p = oview + global_entry_off + ge->second; | |
5634 | Address plt_addr = ge->first->plt_offset(); | |
5635 | if (ge->first->type() == elfcpp::STT_GNU_IFUNC | |
5636 | && ge->first->can_use_relative_reloc(false)) | |
5637 | { | |
5638 | if (iplt_base == invalid_address) | |
5639 | iplt_base = this->targ_->iplt_section()->address(); | |
5640 | plt_addr += iplt_base; | |
5641 | } | |
5642 | else | |
5643 | plt_addr += plt_base; | |
5644 | Address my_addr = global_entry_base + ge->second; | |
5645 | Address off = plt_addr - my_addr; | |
5646 | ||
5647 | if (off + 0x80008000 > 0xffffffff || (off & 3) != 0) | |
5648 | gold_error(_("%s: linkage table error against `%s'"), | |
5649 | ge->first->object()->name().c_str(), | |
5650 | ge->first->demangled_name().c_str()); | |
5651 | ||
5652 | write_insn<big_endian>(p, addis_12_12 + ha(off)), p += 4; | |
5653 | write_insn<big_endian>(p, ld_12_12 + l(off)), p += 4; | |
5654 | write_insn<big_endian>(p, mtctr_12), p += 4; | |
407aa07c | 5655 | write_insn<big_endian>(p, bctr); |
cf43a2fe AM |
5656 | } |
5657 | } | |
5658 | else | |
5659 | { | |
ec661b9d AM |
5660 | const Output_data_got_powerpc<size, big_endian>* got |
5661 | = this->targ_->got_section(); | |
dd93cd0a AM |
5662 | // The address of _GLOBAL_OFFSET_TABLE_. |
5663 | Address g_o_t = got->address() + got->g_o_t(); | |
c9269dff | 5664 | |
cf43a2fe | 5665 | // Write out pltresolve branch table. |
ec661b9d | 5666 | p = oview; |
9e390558 | 5667 | unsigned int the_end = oview_size - this->pltresolve_size(); |
c9269dff | 5668 | unsigned char* end_p = oview + the_end; |
cf43a2fe AM |
5669 | while (p < end_p - 8 * 4) |
5670 | write_insn<big_endian>(p, b + end_p - p), p += 4; | |
5671 | while (p < end_p) | |
5672 | write_insn<big_endian>(p, nop), p += 4; | |
42cacb20 | 5673 | |
cf43a2fe | 5674 | // Write out pltresolve call stub. |
9e390558 | 5675 | end_p = oview + oview_size; |
cf43a2fe | 5676 | if (parameters->options().output_is_position_independent()) |
42cacb20 | 5677 | { |
ec661b9d | 5678 | Address res0_off = 0; |
dd93cd0a AM |
5679 | Address after_bcl_off = the_end + 12; |
5680 | Address bcl_res0 = after_bcl_off - res0_off; | |
cf43a2fe | 5681 | |
9e390558 AM |
5682 | write_insn<big_endian>(p, addis_11_11 + ha(bcl_res0)); |
5683 | p += 4; | |
5684 | write_insn<big_endian>(p, mflr_0); | |
5685 | p += 4; | |
5686 | write_insn<big_endian>(p, bcl_20_31); | |
5687 | p += 4; | |
5688 | write_insn<big_endian>(p, addi_11_11 + l(bcl_res0)); | |
5689 | p += 4; | |
5690 | write_insn<big_endian>(p, mflr_12); | |
5691 | p += 4; | |
5692 | write_insn<big_endian>(p, mtlr_0); | |
5693 | p += 4; | |
5694 | write_insn<big_endian>(p, sub_11_11_12); | |
5695 | p += 4; | |
cf43a2fe | 5696 | |
dd93cd0a | 5697 | Address got_bcl = g_o_t + 4 - (after_bcl_off + this->address()); |
cf43a2fe | 5698 | |
9e390558 AM |
5699 | write_insn<big_endian>(p, addis_12_12 + ha(got_bcl)); |
5700 | p += 4; | |
cf43a2fe AM |
5701 | if (ha(got_bcl) == ha(got_bcl + 4)) |
5702 | { | |
9e390558 AM |
5703 | write_insn<big_endian>(p, lwz_0_12 + l(got_bcl)); |
5704 | p += 4; | |
5705 | write_insn<big_endian>(p, lwz_12_12 + l(got_bcl + 4)); | |
cf43a2fe AM |
5706 | } |
5707 | else | |
5708 | { | |
9e390558 AM |
5709 | write_insn<big_endian>(p, lwzu_0_12 + l(got_bcl)); |
5710 | p += 4; | |
5711 | write_insn<big_endian>(p, lwz_12_12 + 4); | |
cf43a2fe | 5712 | } |
9e390558 AM |
5713 | p += 4; |
5714 | write_insn<big_endian>(p, mtctr_0); | |
5715 | p += 4; | |
5716 | write_insn<big_endian>(p, add_0_11_11); | |
5717 | p += 4; | |
5718 | write_insn<big_endian>(p, add_11_0_11); | |
42cacb20 | 5719 | } |
cf43a2fe | 5720 | else |
42cacb20 | 5721 | { |
ec661b9d | 5722 | Address res0 = this->address(); |
cf43a2fe | 5723 | |
9e390558 AM |
5724 | write_insn<big_endian>(p, lis_12 + ha(g_o_t + 4)); |
5725 | p += 4; | |
5726 | write_insn<big_endian>(p, addis_11_11 + ha(-res0)); | |
5727 | p += 4; | |
cf43a2fe | 5728 | if (ha(g_o_t + 4) == ha(g_o_t + 8)) |
9e390558 | 5729 | write_insn<big_endian>(p, lwz_0_12 + l(g_o_t + 4)); |
cf43a2fe | 5730 | else |
9e390558 AM |
5731 | write_insn<big_endian>(p, lwzu_0_12 + l(g_o_t + 4)); |
5732 | p += 4; | |
5733 | write_insn<big_endian>(p, addi_11_11 + l(-res0)); | |
5734 | p += 4; | |
5735 | write_insn<big_endian>(p, mtctr_0); | |
5736 | p += 4; | |
5737 | write_insn<big_endian>(p, add_0_11_11); | |
5738 | p += 4; | |
cf43a2fe | 5739 | if (ha(g_o_t + 4) == ha(g_o_t + 8)) |
9e390558 | 5740 | write_insn<big_endian>(p, lwz_12_12 + l(g_o_t + 8)); |
cf43a2fe | 5741 | else |
9e390558 AM |
5742 | write_insn<big_endian>(p, lwz_12_12 + 4); |
5743 | p += 4; | |
5744 | write_insn<big_endian>(p, add_11_0_11); | |
5745 | } | |
5746 | p += 4; | |
407aa07c AM |
5747 | write_insn<big_endian>(p, bctr); |
5748 | p += 4; | |
9e390558 AM |
5749 | while (p < end_p) |
5750 | { | |
5751 | write_insn<big_endian>(p, nop); | |
5752 | p += 4; | |
42cacb20 DE |
5753 | } |
5754 | } | |
5755 | ||
cf43a2fe AM |
5756 | of->write_output_view(off, oview_size, oview); |
5757 | } | |
5758 | ||
f3a0ed29 AM |
5759 | |
5760 | // A class to handle linker generated save/restore functions. | |
5761 | ||
5762 | template<int size, bool big_endian> | |
5763 | class Output_data_save_res : public Output_section_data_build | |
5764 | { | |
5765 | public: | |
5766 | Output_data_save_res(Symbol_table* symtab); | |
5767 | ||
d49044c7 AM |
5768 | const unsigned char* |
5769 | contents() const | |
5770 | { | |
5771 | return contents_; | |
5772 | } | |
5773 | ||
f3a0ed29 AM |
5774 | protected: |
5775 | // Write to a map file. | |
5776 | void | |
5777 | do_print_to_mapfile(Mapfile* mapfile) const | |
5778 | { mapfile->print_output_data(this, _("** save/restore")); } | |
5779 | ||
5780 | void | |
5781 | do_write(Output_file*); | |
5782 | ||
5783 | private: | |
5784 | // The maximum size of save/restore contents. | |
5785 | static const unsigned int savres_max = 218*4; | |
5786 | ||
5787 | void | |
5788 | savres_define(Symbol_table* symtab, | |
5789 | const char *name, | |
5790 | unsigned int lo, unsigned int hi, | |
5791 | unsigned char* write_ent(unsigned char*, int), | |
5792 | unsigned char* write_tail(unsigned char*, int)); | |
5793 | ||
5794 | unsigned char *contents_; | |
5795 | }; | |
5796 | ||
5797 | template<bool big_endian> | |
5798 | static unsigned char* | |
5799 | savegpr0(unsigned char* p, int r) | |
5800 | { | |
5801 | uint32_t insn = std_0_1 + (r << 21) + (1 << 16) - (32 - r) * 8; | |
5802 | write_insn<big_endian>(p, insn); | |
5803 | return p + 4; | |
5804 | } | |
5805 | ||
5806 | template<bool big_endian> | |
5807 | static unsigned char* | |
5808 | savegpr0_tail(unsigned char* p, int r) | |
5809 | { | |
5810 | p = savegpr0<big_endian>(p, r); | |
5811 | uint32_t insn = std_0_1 + 16; | |
5812 | write_insn<big_endian>(p, insn); | |
5813 | p = p + 4; | |
5814 | write_insn<big_endian>(p, blr); | |
5815 | return p + 4; | |
5816 | } | |
5817 | ||
5818 | template<bool big_endian> | |
62fe925a | 5819 | static unsigned char* |
f3a0ed29 AM |
5820 | restgpr0(unsigned char* p, int r) |
5821 | { | |
5822 | uint32_t insn = ld_0_1 + (r << 21) + (1 << 16) - (32 - r) * 8; | |
5823 | write_insn<big_endian>(p, insn); | |
5824 | return p + 4; | |
5825 | } | |
5826 | ||
5827 | template<bool big_endian> | |
62fe925a | 5828 | static unsigned char* |
f3a0ed29 AM |
5829 | restgpr0_tail(unsigned char* p, int r) |
5830 | { | |
5831 | uint32_t insn = ld_0_1 + 16; | |
5832 | write_insn<big_endian>(p, insn); | |
5833 | p = p + 4; | |
5834 | p = restgpr0<big_endian>(p, r); | |
5835 | write_insn<big_endian>(p, mtlr_0); | |
5836 | p = p + 4; | |
5837 | if (r == 29) | |
5838 | { | |
5839 | p = restgpr0<big_endian>(p, 30); | |
5840 | p = restgpr0<big_endian>(p, 31); | |
5841 | } | |
5842 | write_insn<big_endian>(p, blr); | |
5843 | return p + 4; | |
5844 | } | |
5845 | ||
5846 | template<bool big_endian> | |
62fe925a | 5847 | static unsigned char* |
f3a0ed29 AM |
5848 | savegpr1(unsigned char* p, int r) |
5849 | { | |
5850 | uint32_t insn = std_0_12 + (r << 21) + (1 << 16) - (32 - r) * 8; | |
5851 | write_insn<big_endian>(p, insn); | |
5852 | return p + 4; | |
5853 | } | |
5854 | ||
5855 | template<bool big_endian> | |
62fe925a | 5856 | static unsigned char* |
f3a0ed29 AM |
5857 | savegpr1_tail(unsigned char* p, int r) |
5858 | { | |
5859 | p = savegpr1<big_endian>(p, r); | |
5860 | write_insn<big_endian>(p, blr); | |
5861 | return p + 4; | |
5862 | } | |
5863 | ||
5864 | template<bool big_endian> | |
62fe925a | 5865 | static unsigned char* |
f3a0ed29 AM |
5866 | restgpr1(unsigned char* p, int r) |
5867 | { | |
5868 | uint32_t insn = ld_0_12 + (r << 21) + (1 << 16) - (32 - r) * 8; | |
5869 | write_insn<big_endian>(p, insn); | |
5870 | return p + 4; | |
5871 | } | |
5872 | ||
5873 | template<bool big_endian> | |
62fe925a | 5874 | static unsigned char* |
f3a0ed29 AM |
5875 | restgpr1_tail(unsigned char* p, int r) |
5876 | { | |
5877 | p = restgpr1<big_endian>(p, r); | |
5878 | write_insn<big_endian>(p, blr); | |
5879 | return p + 4; | |
5880 | } | |
5881 | ||
5882 | template<bool big_endian> | |
62fe925a | 5883 | static unsigned char* |
f3a0ed29 AM |
5884 | savefpr(unsigned char* p, int r) |
5885 | { | |
5886 | uint32_t insn = stfd_0_1 + (r << 21) + (1 << 16) - (32 - r) * 8; | |
5887 | write_insn<big_endian>(p, insn); | |
5888 | return p + 4; | |
5889 | } | |
5890 | ||
5891 | template<bool big_endian> | |
62fe925a | 5892 | static unsigned char* |
f3a0ed29 AM |
5893 | savefpr0_tail(unsigned char* p, int r) |
5894 | { | |
5895 | p = savefpr<big_endian>(p, r); | |
5896 | write_insn<big_endian>(p, std_0_1 + 16); | |
5897 | p = p + 4; | |
5898 | write_insn<big_endian>(p, blr); | |
5899 | return p + 4; | |
5900 | } | |
5901 | ||
5902 | template<bool big_endian> | |
62fe925a | 5903 | static unsigned char* |
f3a0ed29 AM |
5904 | restfpr(unsigned char* p, int r) |
5905 | { | |
5906 | uint32_t insn = lfd_0_1 + (r << 21) + (1 << 16) - (32 - r) * 8; | |
5907 | write_insn<big_endian>(p, insn); | |
5908 | return p + 4; | |
5909 | } | |
5910 | ||
5911 | template<bool big_endian> | |
62fe925a | 5912 | static unsigned char* |
f3a0ed29 AM |
5913 | restfpr0_tail(unsigned char* p, int r) |
5914 | { | |
5915 | write_insn<big_endian>(p, ld_0_1 + 16); | |
5916 | p = p + 4; | |
5917 | p = restfpr<big_endian>(p, r); | |
5918 | write_insn<big_endian>(p, mtlr_0); | |
5919 | p = p + 4; | |
5920 | if (r == 29) | |
5921 | { | |
5922 | p = restfpr<big_endian>(p, 30); | |
5923 | p = restfpr<big_endian>(p, 31); | |
5924 | } | |
5925 | write_insn<big_endian>(p, blr); | |
5926 | return p + 4; | |
5927 | } | |
5928 | ||
5929 | template<bool big_endian> | |
62fe925a | 5930 | static unsigned char* |
f3a0ed29 AM |
5931 | savefpr1_tail(unsigned char* p, int r) |
5932 | { | |
5933 | p = savefpr<big_endian>(p, r); | |
5934 | write_insn<big_endian>(p, blr); | |
5935 | return p + 4; | |
5936 | } | |
5937 | ||
5938 | template<bool big_endian> | |
62fe925a | 5939 | static unsigned char* |
f3a0ed29 AM |
5940 | restfpr1_tail(unsigned char* p, int r) |
5941 | { | |
5942 | p = restfpr<big_endian>(p, r); | |
5943 | write_insn<big_endian>(p, blr); | |
5944 | return p + 4; | |
5945 | } | |
5946 | ||
5947 | template<bool big_endian> | |
62fe925a | 5948 | static unsigned char* |
f3a0ed29 AM |
5949 | savevr(unsigned char* p, int r) |
5950 | { | |
5951 | uint32_t insn = li_12_0 + (1 << 16) - (32 - r) * 16; | |
5952 | write_insn<big_endian>(p, insn); | |
5953 | p = p + 4; | |
5954 | insn = stvx_0_12_0 + (r << 21); | |
5955 | write_insn<big_endian>(p, insn); | |
5956 | return p + 4; | |
5957 | } | |
5958 | ||
5959 | template<bool big_endian> | |
62fe925a | 5960 | static unsigned char* |
f3a0ed29 AM |
5961 | savevr_tail(unsigned char* p, int r) |
5962 | { | |
5963 | p = savevr<big_endian>(p, r); | |
5964 | write_insn<big_endian>(p, blr); | |
5965 | return p + 4; | |
5966 | } | |
5967 | ||
5968 | template<bool big_endian> | |
62fe925a | 5969 | static unsigned char* |
f3a0ed29 AM |
5970 | restvr(unsigned char* p, int r) |
5971 | { | |
5972 | uint32_t insn = li_12_0 + (1 << 16) - (32 - r) * 16; | |
5973 | write_insn<big_endian>(p, insn); | |
5974 | p = p + 4; | |
5975 | insn = lvx_0_12_0 + (r << 21); | |
5976 | write_insn<big_endian>(p, insn); | |
5977 | return p + 4; | |
5978 | } | |
5979 | ||
5980 | template<bool big_endian> | |
62fe925a | 5981 | static unsigned char* |
f3a0ed29 AM |
5982 | restvr_tail(unsigned char* p, int r) |
5983 | { | |
5984 | p = restvr<big_endian>(p, r); | |
5985 | write_insn<big_endian>(p, blr); | |
5986 | return p + 4; | |
5987 | } | |
5988 | ||
5989 | ||
5990 | template<int size, bool big_endian> | |
5991 | Output_data_save_res<size, big_endian>::Output_data_save_res( | |
5992 | Symbol_table* symtab) | |
5993 | : Output_section_data_build(4), | |
5994 | contents_(NULL) | |
5995 | { | |
5996 | this->savres_define(symtab, | |
5997 | "_savegpr0_", 14, 31, | |
5998 | savegpr0<big_endian>, savegpr0_tail<big_endian>); | |
5999 | this->savres_define(symtab, | |
6000 | "_restgpr0_", 14, 29, | |
6001 | restgpr0<big_endian>, restgpr0_tail<big_endian>); | |
6002 | this->savres_define(symtab, | |
6003 | "_restgpr0_", 30, 31, | |
6004 | restgpr0<big_endian>, restgpr0_tail<big_endian>); | |
6005 | this->savres_define(symtab, | |
6006 | "_savegpr1_", 14, 31, | |
6007 | savegpr1<big_endian>, savegpr1_tail<big_endian>); | |
6008 | this->savres_define(symtab, | |
6009 | "_restgpr1_", 14, 31, | |
6010 | restgpr1<big_endian>, restgpr1_tail<big_endian>); | |
6011 | this->savres_define(symtab, | |
6012 | "_savefpr_", 14, 31, | |
6013 | savefpr<big_endian>, savefpr0_tail<big_endian>); | |
6014 | this->savres_define(symtab, | |
6015 | "_restfpr_", 14, 29, | |
6016 | restfpr<big_endian>, restfpr0_tail<big_endian>); | |
6017 | this->savres_define(symtab, | |
6018 | "_restfpr_", 30, 31, | |
6019 | restfpr<big_endian>, restfpr0_tail<big_endian>); | |
6020 | this->savres_define(symtab, | |
6021 | "._savef", 14, 31, | |
6022 | savefpr<big_endian>, savefpr1_tail<big_endian>); | |
6023 | this->savres_define(symtab, | |
6024 | "._restf", 14, 31, | |
6025 | restfpr<big_endian>, restfpr1_tail<big_endian>); | |
6026 | this->savres_define(symtab, | |
6027 | "_savevr_", 20, 31, | |
6028 | savevr<big_endian>, savevr_tail<big_endian>); | |
6029 | this->savres_define(symtab, | |
6030 | "_restvr_", 20, 31, | |
6031 | restvr<big_endian>, restvr_tail<big_endian>); | |
6032 | } | |
6033 | ||
6034 | template<int size, bool big_endian> | |
6035 | void | |
6036 | Output_data_save_res<size, big_endian>::savres_define( | |
6037 | Symbol_table* symtab, | |
6038 | const char *name, | |
6039 | unsigned int lo, unsigned int hi, | |
6040 | unsigned char* write_ent(unsigned char*, int), | |
6041 | unsigned char* write_tail(unsigned char*, int)) | |
6042 | { | |
6043 | size_t len = strlen(name); | |
6044 | bool writing = false; | |
6045 | char sym[16]; | |
6046 | ||
6047 | memcpy(sym, name, len); | |
6048 | sym[len + 2] = 0; | |
6049 | ||
6050 | for (unsigned int i = lo; i <= hi; i++) | |
6051 | { | |
6052 | sym[len + 0] = i / 10 + '0'; | |
6053 | sym[len + 1] = i % 10 + '0'; | |
6054 | Symbol* gsym = symtab->lookup(sym); | |
6055 | bool refd = gsym != NULL && gsym->is_undefined(); | |
6056 | writing = writing || refd; | |
6057 | if (writing) | |
6058 | { | |
6059 | if (this->contents_ == NULL) | |
6060 | this->contents_ = new unsigned char[this->savres_max]; | |
6061 | ||
ec661b9d | 6062 | section_size_type value = this->current_data_size(); |
f3a0ed29 AM |
6063 | unsigned char* p = this->contents_ + value; |
6064 | if (i != hi) | |
6065 | p = write_ent(p, i); | |
6066 | else | |
6067 | p = write_tail(p, i); | |
ec661b9d | 6068 | section_size_type cur_size = p - this->contents_; |
f3a0ed29 AM |
6069 | this->set_current_data_size(cur_size); |
6070 | if (refd) | |
6071 | symtab->define_in_output_data(sym, NULL, Symbol_table::PREDEFINED, | |
6072 | this, value, cur_size - value, | |
6073 | elfcpp::STT_FUNC, elfcpp::STB_GLOBAL, | |
6074 | elfcpp::STV_HIDDEN, 0, false, false); | |
6075 | } | |
6076 | } | |
6077 | } | |
6078 | ||
6079 | // Write out save/restore. | |
6080 | ||
6081 | template<int size, bool big_endian> | |
6082 | void | |
6083 | Output_data_save_res<size, big_endian>::do_write(Output_file* of) | |
6084 | { | |
ec661b9d | 6085 | const section_size_type off = this->offset(); |
f3a0ed29 AM |
6086 | const section_size_type oview_size = |
6087 | convert_to_section_size_type(this->data_size()); | |
6088 | unsigned char* const oview = of->get_output_view(off, oview_size); | |
6089 | memcpy(oview, this->contents_, oview_size); | |
6090 | of->write_output_view(off, oview_size, oview); | |
6091 | } | |
6092 | ||
6093 | ||
cf43a2fe | 6094 | // Create the glink section. |
42cacb20 | 6095 | |
cf43a2fe AM |
6096 | template<int size, bool big_endian> |
6097 | void | |
6098 | Target_powerpc<size, big_endian>::make_glink_section(Layout* layout) | |
6099 | { | |
6100 | if (this->glink_ == NULL) | |
6101 | { | |
6102 | this->glink_ = new Output_data_glink<size, big_endian>(this); | |
9d5781f8 | 6103 | this->glink_->add_eh_frame(layout); |
cf43a2fe AM |
6104 | layout->add_output_section_data(".text", elfcpp::SHT_PROGBITS, |
6105 | elfcpp::SHF_ALLOC | elfcpp::SHF_EXECINSTR, | |
6106 | this->glink_, ORDER_TEXT, false); | |
6107 | } | |
42cacb20 DE |
6108 | } |
6109 | ||
6110 | // Create a PLT entry for a global symbol. | |
6111 | ||
6112 | template<int size, bool big_endian> | |
6113 | void | |
ec661b9d AM |
6114 | Target_powerpc<size, big_endian>::make_plt_entry(Symbol_table* symtab, |
6115 | Layout* layout, | |
6116 | Symbol* gsym) | |
42cacb20 | 6117 | { |
e5d5f5ed AM |
6118 | if (gsym->type() == elfcpp::STT_GNU_IFUNC |
6119 | && gsym->can_use_relative_reloc(false)) | |
6120 | { | |
6121 | if (this->iplt_ == NULL) | |
40b469d7 | 6122 | this->make_iplt_section(symtab, layout); |
03e25981 | 6123 | this->iplt_->add_ifunc_entry(gsym); |
e5d5f5ed AM |
6124 | } |
6125 | else | |
6126 | { | |
6127 | if (this->plt_ == NULL) | |
40b469d7 | 6128 | this->make_plt_section(symtab, layout); |
03e25981 | 6129 | this->plt_->add_entry(gsym); |
e5d5f5ed | 6130 | } |
e5d5f5ed | 6131 | } |
42cacb20 | 6132 | |
e5d5f5ed | 6133 | // Make a PLT entry for a local STT_GNU_IFUNC symbol. |
612a8d3d | 6134 | |
e5d5f5ed AM |
6135 | template<int size, bool big_endian> |
6136 | void | |
6137 | Target_powerpc<size, big_endian>::make_local_ifunc_plt_entry( | |
40b469d7 | 6138 | Symbol_table* symtab, |
e5d5f5ed | 6139 | Layout* layout, |
ec661b9d AM |
6140 | Sized_relobj_file<size, big_endian>* relobj, |
6141 | unsigned int r_sym) | |
e5d5f5ed AM |
6142 | { |
6143 | if (this->iplt_ == NULL) | |
40b469d7 | 6144 | this->make_iplt_section(symtab, layout); |
03e25981 | 6145 | this->iplt_->add_local_ifunc_entry(relobj, r_sym); |
42cacb20 DE |
6146 | } |
6147 | ||
0e70b911 CC |
6148 | // Return the number of entries in the PLT. |
6149 | ||
6150 | template<int size, bool big_endian> | |
6151 | unsigned int | |
6152 | Target_powerpc<size, big_endian>::plt_entry_count() const | |
6153 | { | |
6154 | if (this->plt_ == NULL) | |
6155 | return 0; | |
b3ccdeb5 | 6156 | return this->plt_->entry_count(); |
0e70b911 CC |
6157 | } |
6158 | ||
dd93cd0a | 6159 | // Create a GOT entry for local dynamic __tls_get_addr calls. |
42cacb20 DE |
6160 | |
6161 | template<int size, bool big_endian> | |
6162 | unsigned int | |
dd93cd0a | 6163 | Target_powerpc<size, big_endian>::tlsld_got_offset( |
6fa2a40b CC |
6164 | Symbol_table* symtab, |
6165 | Layout* layout, | |
6166 | Sized_relobj_file<size, big_endian>* object) | |
42cacb20 | 6167 | { |
dd93cd0a | 6168 | if (this->tlsld_got_offset_ == -1U) |
42cacb20 DE |
6169 | { |
6170 | gold_assert(symtab != NULL && layout != NULL && object != NULL); | |
6171 | Reloc_section* rela_dyn = this->rela_dyn_section(layout); | |
dd93cd0a AM |
6172 | Output_data_got_powerpc<size, big_endian>* got |
6173 | = this->got_section(symtab, layout); | |
6174 | unsigned int got_offset = got->add_constant_pair(0, 0); | |
42cacb20 DE |
6175 | rela_dyn->add_local(object, 0, elfcpp::R_POWERPC_DTPMOD, got, |
6176 | got_offset, 0); | |
dd93cd0a | 6177 | this->tlsld_got_offset_ = got_offset; |
42cacb20 | 6178 | } |
dd93cd0a | 6179 | return this->tlsld_got_offset_; |
42cacb20 DE |
6180 | } |
6181 | ||
95a2c8d6 RS |
6182 | // Get the Reference_flags for a particular relocation. |
6183 | ||
6184 | template<int size, bool big_endian> | |
6185 | int | |
88b8e639 AM |
6186 | Target_powerpc<size, big_endian>::Scan::get_reference_flags( |
6187 | unsigned int r_type, | |
6188 | const Target_powerpc* target) | |
95a2c8d6 | 6189 | { |
88b8e639 AM |
6190 | int ref = 0; |
6191 | ||
95a2c8d6 RS |
6192 | switch (r_type) |
6193 | { | |
6194 | case elfcpp::R_POWERPC_NONE: | |
6195 | case elfcpp::R_POWERPC_GNU_VTINHERIT: | |
6196 | case elfcpp::R_POWERPC_GNU_VTENTRY: | |
6197 | case elfcpp::R_PPC64_TOC: | |
6198 | // No symbol reference. | |
88b8e639 | 6199 | break; |
95a2c8d6 | 6200 | |
dd93cd0a AM |
6201 | case elfcpp::R_PPC64_ADDR64: |
6202 | case elfcpp::R_PPC64_UADDR64: | |
6203 | case elfcpp::R_POWERPC_ADDR32: | |
6204 | case elfcpp::R_POWERPC_UADDR32: | |
95a2c8d6 | 6205 | case elfcpp::R_POWERPC_ADDR16: |
dd93cd0a | 6206 | case elfcpp::R_POWERPC_UADDR16: |
95a2c8d6 RS |
6207 | case elfcpp::R_POWERPC_ADDR16_LO: |
6208 | case elfcpp::R_POWERPC_ADDR16_HI: | |
6209 | case elfcpp::R_POWERPC_ADDR16_HA: | |
88b8e639 AM |
6210 | ref = Symbol::ABSOLUTE_REF; |
6211 | break; | |
95a2c8d6 | 6212 | |
dd93cd0a AM |
6213 | case elfcpp::R_POWERPC_ADDR24: |
6214 | case elfcpp::R_POWERPC_ADDR14: | |
6215 | case elfcpp::R_POWERPC_ADDR14_BRTAKEN: | |
6216 | case elfcpp::R_POWERPC_ADDR14_BRNTAKEN: | |
88b8e639 AM |
6217 | ref = Symbol::FUNCTION_CALL | Symbol::ABSOLUTE_REF; |
6218 | break; | |
dd93cd0a | 6219 | |
e5d5f5ed | 6220 | case elfcpp::R_PPC64_REL64: |
dd93cd0a | 6221 | case elfcpp::R_POWERPC_REL32: |
95a2c8d6 | 6222 | case elfcpp::R_PPC_LOCAL24PC: |
6ce78956 AM |
6223 | case elfcpp::R_POWERPC_REL16: |
6224 | case elfcpp::R_POWERPC_REL16_LO: | |
6225 | case elfcpp::R_POWERPC_REL16_HI: | |
6226 | case elfcpp::R_POWERPC_REL16_HA: | |
88b8e639 AM |
6227 | ref = Symbol::RELATIVE_REF; |
6228 | break; | |
95a2c8d6 | 6229 | |
dd93cd0a | 6230 | case elfcpp::R_POWERPC_REL24: |
95a2c8d6 | 6231 | case elfcpp::R_PPC_PLTREL24: |
dd93cd0a AM |
6232 | case elfcpp::R_POWERPC_REL14: |
6233 | case elfcpp::R_POWERPC_REL14_BRTAKEN: | |
6234 | case elfcpp::R_POWERPC_REL14_BRNTAKEN: | |
88b8e639 AM |
6235 | ref = Symbol::FUNCTION_CALL | Symbol::RELATIVE_REF; |
6236 | break; | |
95a2c8d6 RS |
6237 | |
6238 | case elfcpp::R_POWERPC_GOT16: | |
6239 | case elfcpp::R_POWERPC_GOT16_LO: | |
6240 | case elfcpp::R_POWERPC_GOT16_HI: | |
6241 | case elfcpp::R_POWERPC_GOT16_HA: | |
e5d5f5ed AM |
6242 | case elfcpp::R_PPC64_GOT16_DS: |
6243 | case elfcpp::R_PPC64_GOT16_LO_DS: | |
95a2c8d6 RS |
6244 | case elfcpp::R_PPC64_TOC16: |
6245 | case elfcpp::R_PPC64_TOC16_LO: | |
6246 | case elfcpp::R_PPC64_TOC16_HI: | |
6247 | case elfcpp::R_PPC64_TOC16_HA: | |
6248 | case elfcpp::R_PPC64_TOC16_DS: | |
6249 | case elfcpp::R_PPC64_TOC16_LO_DS: | |
32d849b3 | 6250 | ref = Symbol::RELATIVE_REF; |
88b8e639 | 6251 | break; |
95a2c8d6 RS |
6252 | |
6253 | case elfcpp::R_POWERPC_GOT_TPREL16: | |
6254 | case elfcpp::R_POWERPC_TLS: | |
88b8e639 AM |
6255 | ref = Symbol::TLS_REF; |
6256 | break; | |
95a2c8d6 RS |
6257 | |
6258 | case elfcpp::R_POWERPC_COPY: | |
6259 | case elfcpp::R_POWERPC_GLOB_DAT: | |
6260 | case elfcpp::R_POWERPC_JMP_SLOT: | |
6261 | case elfcpp::R_POWERPC_RELATIVE: | |
6262 | case elfcpp::R_POWERPC_DTPMOD: | |
6263 | default: | |
6264 | // Not expected. We will give an error later. | |
88b8e639 | 6265 | break; |
95a2c8d6 | 6266 | } |
88b8e639 AM |
6267 | |
6268 | if (size == 64 && target->abiversion() < 2) | |
6269 | ref |= Symbol::FUNC_DESC_ABI; | |
6270 | return ref; | |
95a2c8d6 RS |
6271 | } |
6272 | ||
42cacb20 DE |
6273 | // Report an unsupported relocation against a local symbol. |
6274 | ||
6275 | template<int size, bool big_endian> | |
6276 | void | |
6277 | Target_powerpc<size, big_endian>::Scan::unsupported_reloc_local( | |
d83ce4e3 AM |
6278 | Sized_relobj_file<size, big_endian>* object, |
6279 | unsigned int r_type) | |
42cacb20 DE |
6280 | { |
6281 | gold_error(_("%s: unsupported reloc %u against local symbol"), | |
6282 | object->name().c_str(), r_type); | |
6283 | } | |
6284 | ||
6285 | // We are about to emit a dynamic relocation of type R_TYPE. If the | |
6286 | // dynamic linker does not support it, issue an error. | |
6287 | ||
6288 | template<int size, bool big_endian> | |
6289 | void | |
6290 | Target_powerpc<size, big_endian>::Scan::check_non_pic(Relobj* object, | |
6291 | unsigned int r_type) | |
6292 | { | |
6293 | gold_assert(r_type != elfcpp::R_POWERPC_NONE); | |
6294 | ||
6295 | // These are the relocation types supported by glibc for both 32-bit | |
6296 | // and 64-bit powerpc. | |
6297 | switch (r_type) | |
6298 | { | |
3ea0a085 | 6299 | case elfcpp::R_POWERPC_NONE: |
42cacb20 DE |
6300 | case elfcpp::R_POWERPC_RELATIVE: |
6301 | case elfcpp::R_POWERPC_GLOB_DAT: | |
6302 | case elfcpp::R_POWERPC_DTPMOD: | |
6303 | case elfcpp::R_POWERPC_DTPREL: | |
6304 | case elfcpp::R_POWERPC_TPREL: | |
6305 | case elfcpp::R_POWERPC_JMP_SLOT: | |
6306 | case elfcpp::R_POWERPC_COPY: | |
3ea0a085 | 6307 | case elfcpp::R_POWERPC_IRELATIVE: |
42cacb20 | 6308 | case elfcpp::R_POWERPC_ADDR32: |
3ea0a085 | 6309 | case elfcpp::R_POWERPC_UADDR32: |
42cacb20 | 6310 | case elfcpp::R_POWERPC_ADDR24: |
3ea0a085 AM |
6311 | case elfcpp::R_POWERPC_ADDR16: |
6312 | case elfcpp::R_POWERPC_UADDR16: | |
6313 | case elfcpp::R_POWERPC_ADDR16_LO: | |
6314 | case elfcpp::R_POWERPC_ADDR16_HI: | |
6315 | case elfcpp::R_POWERPC_ADDR16_HA: | |
6316 | case elfcpp::R_POWERPC_ADDR14: | |
6317 | case elfcpp::R_POWERPC_ADDR14_BRTAKEN: | |
6318 | case elfcpp::R_POWERPC_ADDR14_BRNTAKEN: | |
6319 | case elfcpp::R_POWERPC_REL32: | |
42cacb20 | 6320 | case elfcpp::R_POWERPC_REL24: |
3ea0a085 AM |
6321 | case elfcpp::R_POWERPC_TPREL16: |
6322 | case elfcpp::R_POWERPC_TPREL16_LO: | |
6323 | case elfcpp::R_POWERPC_TPREL16_HI: | |
6324 | case elfcpp::R_POWERPC_TPREL16_HA: | |
42cacb20 DE |
6325 | return; |
6326 | ||
6327 | default: | |
6328 | break; | |
6329 | } | |
6330 | ||
6331 | if (size == 64) | |
6332 | { | |
6333 | switch (r_type) | |
6334 | { | |
6335 | // These are the relocation types supported only on 64-bit. | |
6336 | case elfcpp::R_PPC64_ADDR64: | |
42cacb20 | 6337 | case elfcpp::R_PPC64_UADDR64: |
3ea0a085 | 6338 | case elfcpp::R_PPC64_JMP_IREL: |
42cacb20 | 6339 | case elfcpp::R_PPC64_ADDR16_DS: |
3ea0a085 | 6340 | case elfcpp::R_PPC64_ADDR16_LO_DS: |
f9c6b907 AM |
6341 | case elfcpp::R_PPC64_ADDR16_HIGH: |
6342 | case elfcpp::R_PPC64_ADDR16_HIGHA: | |
42cacb20 DE |
6343 | case elfcpp::R_PPC64_ADDR16_HIGHER: |
6344 | case elfcpp::R_PPC64_ADDR16_HIGHEST: | |
6345 | case elfcpp::R_PPC64_ADDR16_HIGHERA: | |
6346 | case elfcpp::R_PPC64_ADDR16_HIGHESTA: | |
42cacb20 | 6347 | case elfcpp::R_PPC64_REL64: |
3ea0a085 AM |
6348 | case elfcpp::R_POWERPC_ADDR30: |
6349 | case elfcpp::R_PPC64_TPREL16_DS: | |
6350 | case elfcpp::R_PPC64_TPREL16_LO_DS: | |
f9c6b907 AM |
6351 | case elfcpp::R_PPC64_TPREL16_HIGH: |
6352 | case elfcpp::R_PPC64_TPREL16_HIGHA: | |
3ea0a085 AM |
6353 | case elfcpp::R_PPC64_TPREL16_HIGHER: |
6354 | case elfcpp::R_PPC64_TPREL16_HIGHEST: | |
6355 | case elfcpp::R_PPC64_TPREL16_HIGHERA: | |
6356 | case elfcpp::R_PPC64_TPREL16_HIGHESTA: | |
42cacb20 DE |
6357 | return; |
6358 | ||
6359 | default: | |
6360 | break; | |
6361 | } | |
6362 | } | |
6363 | else | |
6364 | { | |
6365 | switch (r_type) | |
6366 | { | |
6367 | // These are the relocation types supported only on 32-bit. | |
3ea0a085 AM |
6368 | // ??? glibc ld.so doesn't need to support these. |
6369 | case elfcpp::R_POWERPC_DTPREL16: | |
6370 | case elfcpp::R_POWERPC_DTPREL16_LO: | |
6371 | case elfcpp::R_POWERPC_DTPREL16_HI: | |
6372 | case elfcpp::R_POWERPC_DTPREL16_HA: | |
6373 | return; | |
42cacb20 DE |
6374 | |
6375 | default: | |
6376 | break; | |
6377 | } | |
6378 | } | |
6379 | ||
6380 | // This prevents us from issuing more than one error per reloc | |
6381 | // section. But we can still wind up issuing more than one | |
6382 | // error per object file. | |
6383 | if (this->issued_non_pic_error_) | |
6384 | return; | |
33aea2fd | 6385 | gold_assert(parameters->options().output_is_position_independent()); |
42cacb20 DE |
6386 | object->error(_("requires unsupported dynamic reloc; " |
6387 | "recompile with -fPIC")); | |
6388 | this->issued_non_pic_error_ = true; | |
6389 | return; | |
6390 | } | |
6391 | ||
e5d5f5ed AM |
6392 | // Return whether we need to make a PLT entry for a relocation of the |
6393 | // given type against a STT_GNU_IFUNC symbol. | |
6394 | ||
6395 | template<int size, bool big_endian> | |
6396 | bool | |
6397 | Target_powerpc<size, big_endian>::Scan::reloc_needs_plt_for_ifunc( | |
9055360d | 6398 | Target_powerpc<size, big_endian>* target, |
e5d5f5ed | 6399 | Sized_relobj_file<size, big_endian>* object, |
b3ccdeb5 AM |
6400 | unsigned int r_type, |
6401 | bool report_err) | |
e5d5f5ed | 6402 | { |
c9824451 AM |
6403 | // In non-pic code any reference will resolve to the plt call stub |
6404 | // for the ifunc symbol. | |
9055360d AM |
6405 | if ((size == 32 || target->abiversion() >= 2) |
6406 | && !parameters->options().output_is_position_independent()) | |
c9824451 AM |
6407 | return true; |
6408 | ||
e5d5f5ed AM |
6409 | switch (r_type) |
6410 | { | |
b3ccdeb5 | 6411 | // Word size refs from data sections are OK, but don't need a PLT entry. |
e5d5f5ed AM |
6412 | case elfcpp::R_POWERPC_ADDR32: |
6413 | case elfcpp::R_POWERPC_UADDR32: | |
6414 | if (size == 32) | |
b3ccdeb5 | 6415 | return false; |
e5d5f5ed AM |
6416 | break; |
6417 | ||
6418 | case elfcpp::R_PPC64_ADDR64: | |
6419 | case elfcpp::R_PPC64_UADDR64: | |
6420 | if (size == 64) | |
b3ccdeb5 | 6421 | return false; |
e5d5f5ed AM |
6422 | break; |
6423 | ||
b3ccdeb5 | 6424 | // GOT refs are good, but also don't need a PLT entry. |
e5d5f5ed AM |
6425 | case elfcpp::R_POWERPC_GOT16: |
6426 | case elfcpp::R_POWERPC_GOT16_LO: | |
6427 | case elfcpp::R_POWERPC_GOT16_HI: | |
6428 | case elfcpp::R_POWERPC_GOT16_HA: | |
6429 | case elfcpp::R_PPC64_GOT16_DS: | |
6430 | case elfcpp::R_PPC64_GOT16_LO_DS: | |
b3ccdeb5 | 6431 | return false; |
e5d5f5ed | 6432 | |
b3ccdeb5 | 6433 | // Function calls are good, and these do need a PLT entry. |
e5d5f5ed AM |
6434 | case elfcpp::R_POWERPC_ADDR24: |
6435 | case elfcpp::R_POWERPC_ADDR14: | |
6436 | case elfcpp::R_POWERPC_ADDR14_BRTAKEN: | |
6437 | case elfcpp::R_POWERPC_ADDR14_BRNTAKEN: | |
6438 | case elfcpp::R_POWERPC_REL24: | |
6439 | case elfcpp::R_PPC_PLTREL24: | |
6440 | case elfcpp::R_POWERPC_REL14: | |
6441 | case elfcpp::R_POWERPC_REL14_BRTAKEN: | |
6442 | case elfcpp::R_POWERPC_REL14_BRNTAKEN: | |
6443 | return true; | |
6444 | ||
6445 | default: | |
6446 | break; | |
6447 | } | |
6448 | ||
6449 | // Anything else is a problem. | |
6450 | // If we are building a static executable, the libc startup function | |
6451 | // responsible for applying indirect function relocations is going | |
6452 | // to complain about the reloc type. | |
6453 | // If we are building a dynamic executable, we will have a text | |
6454 | // relocation. The dynamic loader will set the text segment | |
6455 | // writable and non-executable to apply text relocations. So we'll | |
6456 | // segfault when trying to run the indirection function to resolve | |
6457 | // the reloc. | |
b3ccdeb5 AM |
6458 | if (report_err) |
6459 | gold_error(_("%s: unsupported reloc %u for IFUNC symbol"), | |
e5d5f5ed AM |
6460 | object->name().c_str(), r_type); |
6461 | return false; | |
6462 | } | |
6463 | ||
5edad15d AM |
6464 | // Return TRUE iff INSN is one we expect on a _LO variety toc/got |
6465 | // reloc. | |
6466 | ||
6467 | static bool | |
6468 | ok_lo_toc_insn(uint32_t insn, unsigned int r_type) | |
6469 | { | |
6470 | return ((insn & (0x3f << 26)) == 12u << 26 /* addic */ | |
6471 | || (insn & (0x3f << 26)) == 14u << 26 /* addi */ | |
6472 | || (insn & (0x3f << 26)) == 32u << 26 /* lwz */ | |
6473 | || (insn & (0x3f << 26)) == 34u << 26 /* lbz */ | |
6474 | || (insn & (0x3f << 26)) == 36u << 26 /* stw */ | |
6475 | || (insn & (0x3f << 26)) == 38u << 26 /* stb */ | |
6476 | || (insn & (0x3f << 26)) == 40u << 26 /* lhz */ | |
6477 | || (insn & (0x3f << 26)) == 42u << 26 /* lha */ | |
6478 | || (insn & (0x3f << 26)) == 44u << 26 /* sth */ | |
6479 | || (insn & (0x3f << 26)) == 46u << 26 /* lmw */ | |
6480 | || (insn & (0x3f << 26)) == 47u << 26 /* stmw */ | |
6481 | || (insn & (0x3f << 26)) == 48u << 26 /* lfs */ | |
6482 | || (insn & (0x3f << 26)) == 50u << 26 /* lfd */ | |
6483 | || (insn & (0x3f << 26)) == 52u << 26 /* stfs */ | |
6484 | || (insn & (0x3f << 26)) == 54u << 26 /* stfd */ | |
6485 | || (insn & (0x3f << 26)) == 56u << 26 /* lq,lfq */ | |
6486 | || ((insn & (0x3f << 26)) == 57u << 26 /* lxsd,lxssp,lfdp */ | |
6487 | /* Exclude lfqu by testing reloc. If relocs are ever | |
6488 | defined for the reduced D field in psq_lu then those | |
6489 | will need testing too. */ | |
6490 | && r_type != elfcpp::R_PPC64_TOC16_LO | |
6491 | && r_type != elfcpp::R_POWERPC_GOT16_LO) | |
6492 | || ((insn & (0x3f << 26)) == 58u << 26 /* ld,lwa */ | |
6493 | && (insn & 1) == 0) | |
6494 | || (insn & (0x3f << 26)) == 60u << 26 /* stfq */ | |
6495 | || ((insn & (0x3f << 26)) == 61u << 26 /* lxv,stx{v,sd,ssp},stfdp */ | |
6496 | /* Exclude stfqu. psq_stu as above for psq_lu. */ | |
6497 | && r_type != elfcpp::R_PPC64_TOC16_LO | |
6498 | && r_type != elfcpp::R_POWERPC_GOT16_LO) | |
6499 | || ((insn & (0x3f << 26)) == 62u << 26 /* std,stq */ | |
6500 | && (insn & 1) == 0)); | |
6501 | } | |
6502 | ||
42cacb20 DE |
6503 | // Scan a relocation for a local symbol. |
6504 | ||
6505 | template<int size, bool big_endian> | |
6506 | inline void | |
6507 | Target_powerpc<size, big_endian>::Scan::local( | |
d83ce4e3 AM |
6508 | Symbol_table* symtab, |
6509 | Layout* layout, | |
6510 | Target_powerpc<size, big_endian>* target, | |
6511 | Sized_relobj_file<size, big_endian>* object, | |
6512 | unsigned int data_shndx, | |
6513 | Output_section* output_section, | |
6514 | const elfcpp::Rela<size, big_endian>& reloc, | |
6515 | unsigned int r_type, | |
e5d5f5ed | 6516 | const elfcpp::Sym<size, big_endian>& lsym, |
bfdfa4cd | 6517 | bool is_discarded) |
42cacb20 | 6518 | { |
34e0882b | 6519 | this->maybe_skip_tls_get_addr_call(target, r_type, NULL); |
e3deeb9c AM |
6520 | |
6521 | if ((size == 64 && r_type == elfcpp::R_PPC64_TLSGD) | |
6522 | || (size == 32 && r_type == elfcpp::R_PPC_TLSGD)) | |
6523 | { | |
6524 | this->expect_tls_get_addr_call(); | |
6525 | const tls::Tls_optimization tls_type = target->optimize_tls_gd(true); | |
6526 | if (tls_type != tls::TLSOPT_NONE) | |
6527 | this->skip_next_tls_get_addr_call(); | |
6528 | } | |
6529 | else if ((size == 64 && r_type == elfcpp::R_PPC64_TLSLD) | |
6530 | || (size == 32 && r_type == elfcpp::R_PPC_TLSLD)) | |
6531 | { | |
6532 | this->expect_tls_get_addr_call(); | |
6533 | const tls::Tls_optimization tls_type = target->optimize_tls_ld(); | |
6534 | if (tls_type != tls::TLSOPT_NONE) | |
6535 | this->skip_next_tls_get_addr_call(); | |
6536 | } | |
6537 | ||
dd93cd0a AM |
6538 | Powerpc_relobj<size, big_endian>* ppc_object |
6539 | = static_cast<Powerpc_relobj<size, big_endian>*>(object); | |
6540 | ||
bfdfa4cd AM |
6541 | if (is_discarded) |
6542 | { | |
6543 | if (size == 64 | |
6544 | && data_shndx == ppc_object->opd_shndx() | |
6545 | && r_type == elfcpp::R_PPC64_ADDR64) | |
6546 | ppc_object->set_opd_discard(reloc.get_r_offset()); | |
6547 | return; | |
6548 | } | |
6549 | ||
e5d5f5ed AM |
6550 | // A local STT_GNU_IFUNC symbol may require a PLT entry. |
6551 | bool is_ifunc = lsym.get_st_type() == elfcpp::STT_GNU_IFUNC; | |
9055360d | 6552 | if (is_ifunc && this->reloc_needs_plt_for_ifunc(target, object, r_type, true)) |
40b469d7 | 6553 | { |
ec661b9d AM |
6554 | unsigned int r_sym = elfcpp::elf_r_sym<size>(reloc.get_r_info()); |
6555 | target->push_branch(ppc_object, data_shndx, reloc.get_r_offset(), | |
6556 | r_type, r_sym, reloc.get_r_addend()); | |
6557 | target->make_local_ifunc_plt_entry(symtab, layout, object, r_sym); | |
40b469d7 | 6558 | } |
e5d5f5ed | 6559 | |
42cacb20 DE |
6560 | switch (r_type) |
6561 | { | |
6562 | case elfcpp::R_POWERPC_NONE: | |
6563 | case elfcpp::R_POWERPC_GNU_VTINHERIT: | |
6564 | case elfcpp::R_POWERPC_GNU_VTENTRY: | |
7404fe1b | 6565 | case elfcpp::R_POWERPC_TLS: |
549dba71 | 6566 | case elfcpp::R_PPC64_ENTRY: |
dd93cd0a AM |
6567 | break; |
6568 | ||
6569 | case elfcpp::R_PPC64_TOC: | |
6570 | { | |
6571 | Output_data_got_powerpc<size, big_endian>* got | |
6572 | = target->got_section(symtab, layout); | |
6573 | if (parameters->options().output_is_position_independent()) | |
6574 | { | |
bfdfa4cd AM |
6575 | Address off = reloc.get_r_offset(); |
6576 | if (size == 64 | |
9055360d | 6577 | && target->abiversion() < 2 |
bfdfa4cd AM |
6578 | && data_shndx == ppc_object->opd_shndx() |
6579 | && ppc_object->get_opd_discard(off - 8)) | |
6580 | break; | |
6581 | ||
dd93cd0a | 6582 | Reloc_section* rela_dyn = target->rela_dyn_section(layout); |
bfdfa4cd | 6583 | Powerpc_relobj<size, big_endian>* symobj = ppc_object; |
dd93cd0a AM |
6584 | rela_dyn->add_output_section_relative(got->output_section(), |
6585 | elfcpp::R_POWERPC_RELATIVE, | |
6586 | output_section, | |
bfdfa4cd AM |
6587 | object, data_shndx, off, |
6588 | symobj->toc_base_offset()); | |
dd93cd0a AM |
6589 | } |
6590 | } | |
42cacb20 DE |
6591 | break; |
6592 | ||
6593 | case elfcpp::R_PPC64_ADDR64: | |
dd93cd0a | 6594 | case elfcpp::R_PPC64_UADDR64: |
42cacb20 | 6595 | case elfcpp::R_POWERPC_ADDR32: |
dd93cd0a AM |
6596 | case elfcpp::R_POWERPC_UADDR32: |
6597 | case elfcpp::R_POWERPC_ADDR24: | |
c9269dff | 6598 | case elfcpp::R_POWERPC_ADDR16: |
42cacb20 | 6599 | case elfcpp::R_POWERPC_ADDR16_LO: |
c9269dff AM |
6600 | case elfcpp::R_POWERPC_ADDR16_HI: |
6601 | case elfcpp::R_POWERPC_ADDR16_HA: | |
dd93cd0a | 6602 | case elfcpp::R_POWERPC_UADDR16: |
f9c6b907 AM |
6603 | case elfcpp::R_PPC64_ADDR16_HIGH: |
6604 | case elfcpp::R_PPC64_ADDR16_HIGHA: | |
dd93cd0a AM |
6605 | case elfcpp::R_PPC64_ADDR16_HIGHER: |
6606 | case elfcpp::R_PPC64_ADDR16_HIGHERA: | |
6607 | case elfcpp::R_PPC64_ADDR16_HIGHEST: | |
6608 | case elfcpp::R_PPC64_ADDR16_HIGHESTA: | |
6609 | case elfcpp::R_PPC64_ADDR16_DS: | |
6610 | case elfcpp::R_PPC64_ADDR16_LO_DS: | |
6611 | case elfcpp::R_POWERPC_ADDR14: | |
6612 | case elfcpp::R_POWERPC_ADDR14_BRTAKEN: | |
6613 | case elfcpp::R_POWERPC_ADDR14_BRNTAKEN: | |
42cacb20 DE |
6614 | // If building a shared library (or a position-independent |
6615 | // executable), we need to create a dynamic relocation for | |
6616 | // this location. | |
c9824451 | 6617 | if (parameters->options().output_is_position_independent() |
9055360d | 6618 | || (size == 64 && is_ifunc && target->abiversion() < 2)) |
2e702c99 | 6619 | { |
b3ccdeb5 AM |
6620 | Reloc_section* rela_dyn = target->rela_dyn_section(symtab, layout, |
6621 | is_ifunc); | |
1f98a074 | 6622 | unsigned int r_sym = elfcpp::elf_r_sym<size>(reloc.get_r_info()); |
dd93cd0a AM |
6623 | if ((size == 32 && r_type == elfcpp::R_POWERPC_ADDR32) |
6624 | || (size == 64 && r_type == elfcpp::R_PPC64_ADDR64)) | |
2e702c99 | 6625 | { |
b3ccdeb5 AM |
6626 | unsigned int dynrel = (is_ifunc ? elfcpp::R_POWERPC_IRELATIVE |
6627 | : elfcpp::R_POWERPC_RELATIVE); | |
e5d5f5ed | 6628 | rela_dyn->add_local_relative(object, r_sym, dynrel, |
dd93cd0a AM |
6629 | output_section, data_shndx, |
6630 | reloc.get_r_offset(), | |
c9824451 | 6631 | reloc.get_r_addend(), false); |
2e702c99 | 6632 | } |
1f98a074 | 6633 | else if (lsym.get_st_type() != elfcpp::STT_SECTION) |
2e702c99 | 6634 | { |
dd93cd0a | 6635 | check_non_pic(object, r_type); |
dd93cd0a AM |
6636 | rela_dyn->add_local(object, r_sym, r_type, output_section, |
6637 | data_shndx, reloc.get_r_offset(), | |
6638 | reloc.get_r_addend()); | |
2e702c99 | 6639 | } |
1f98a074 AM |
6640 | else |
6641 | { | |
6642 | gold_assert(lsym.get_st_value() == 0); | |
6643 | unsigned int shndx = lsym.get_st_shndx(); | |
6644 | bool is_ordinary; | |
6645 | shndx = object->adjust_sym_shndx(r_sym, shndx, | |
6646 | &is_ordinary); | |
6647 | if (!is_ordinary) | |
6648 | object->error(_("section symbol %u has bad shndx %u"), | |
6649 | r_sym, shndx); | |
6650 | else | |
6651 | rela_dyn->add_local_section(object, shndx, r_type, | |
6652 | output_section, data_shndx, | |
6653 | reloc.get_r_offset()); | |
6654 | } | |
2e702c99 | 6655 | } |
42cacb20 DE |
6656 | break; |
6657 | ||
6658 | case elfcpp::R_POWERPC_REL24: | |
c9824451 | 6659 | case elfcpp::R_PPC_PLTREL24: |
42cacb20 | 6660 | case elfcpp::R_PPC_LOCAL24PC: |
ec661b9d AM |
6661 | case elfcpp::R_POWERPC_REL14: |
6662 | case elfcpp::R_POWERPC_REL14_BRTAKEN: | |
6663 | case elfcpp::R_POWERPC_REL14_BRNTAKEN: | |
b3ccdeb5 | 6664 | if (!is_ifunc) |
0e123f69 AM |
6665 | { |
6666 | unsigned int r_sym = elfcpp::elf_r_sym<size>(reloc.get_r_info()); | |
6667 | target->push_branch(ppc_object, data_shndx, reloc.get_r_offset(), | |
6668 | r_type, r_sym, reloc.get_r_addend()); | |
6669 | } | |
ec661b9d AM |
6670 | break; |
6671 | ||
7e57d19e AM |
6672 | case elfcpp::R_PPC64_TOCSAVE: |
6673 | // R_PPC64_TOCSAVE follows a call instruction to indicate the | |
6674 | // caller has already saved r2 and thus a plt call stub need not | |
6675 | // save r2. | |
6676 | if (size == 64 | |
6677 | && target->mark_pltcall(ppc_object, data_shndx, | |
6678 | reloc.get_r_offset() - 4, symtab)) | |
6679 | { | |
6680 | unsigned int r_sym = elfcpp::elf_r_sym<size>(reloc.get_r_info()); | |
6681 | unsigned int shndx = lsym.get_st_shndx(); | |
6682 | bool is_ordinary; | |
6683 | shndx = object->adjust_sym_shndx(r_sym, shndx, &is_ordinary); | |
6684 | if (!is_ordinary) | |
6685 | object->error(_("tocsave symbol %u has bad shndx %u"), | |
6686 | r_sym, shndx); | |
6687 | else | |
6688 | target->add_tocsave(ppc_object, shndx, | |
6689 | lsym.get_st_value() + reloc.get_r_addend()); | |
6690 | } | |
6691 | break; | |
6692 | ||
ec661b9d AM |
6693 | case elfcpp::R_PPC64_REL64: |
6694 | case elfcpp::R_POWERPC_REL32: | |
dd93cd0a | 6695 | case elfcpp::R_POWERPC_REL16: |
6ce78956 | 6696 | case elfcpp::R_POWERPC_REL16_LO: |
dd93cd0a | 6697 | case elfcpp::R_POWERPC_REL16_HI: |
6ce78956 | 6698 | case elfcpp::R_POWERPC_REL16_HA: |
a680de9a | 6699 | case elfcpp::R_POWERPC_REL16DX_HA: |
dd93cd0a | 6700 | case elfcpp::R_POWERPC_SECTOFF: |
dd93cd0a | 6701 | case elfcpp::R_POWERPC_SECTOFF_LO: |
dd93cd0a | 6702 | case elfcpp::R_POWERPC_SECTOFF_HI: |
dd93cd0a | 6703 | case elfcpp::R_POWERPC_SECTOFF_HA: |
f9c6b907 AM |
6704 | case elfcpp::R_PPC64_SECTOFF_DS: |
6705 | case elfcpp::R_PPC64_SECTOFF_LO_DS: | |
6706 | case elfcpp::R_POWERPC_TPREL16: | |
6707 | case elfcpp::R_POWERPC_TPREL16_LO: | |
6708 | case elfcpp::R_POWERPC_TPREL16_HI: | |
dd93cd0a | 6709 | case elfcpp::R_POWERPC_TPREL16_HA: |
f9c6b907 AM |
6710 | case elfcpp::R_PPC64_TPREL16_DS: |
6711 | case elfcpp::R_PPC64_TPREL16_LO_DS: | |
6712 | case elfcpp::R_PPC64_TPREL16_HIGH: | |
6713 | case elfcpp::R_PPC64_TPREL16_HIGHA: | |
dd93cd0a | 6714 | case elfcpp::R_PPC64_TPREL16_HIGHER: |
dd93cd0a | 6715 | case elfcpp::R_PPC64_TPREL16_HIGHERA: |
dd93cd0a | 6716 | case elfcpp::R_PPC64_TPREL16_HIGHEST: |
dd93cd0a | 6717 | case elfcpp::R_PPC64_TPREL16_HIGHESTA: |
f9c6b907 AM |
6718 | case elfcpp::R_POWERPC_DTPREL16: |
6719 | case elfcpp::R_POWERPC_DTPREL16_LO: | |
6720 | case elfcpp::R_POWERPC_DTPREL16_HI: | |
6721 | case elfcpp::R_POWERPC_DTPREL16_HA: | |
dd93cd0a AM |
6722 | case elfcpp::R_PPC64_DTPREL16_DS: |
6723 | case elfcpp::R_PPC64_DTPREL16_LO_DS: | |
f9c6b907 AM |
6724 | case elfcpp::R_PPC64_DTPREL16_HIGH: |
6725 | case elfcpp::R_PPC64_DTPREL16_HIGHA: | |
6726 | case elfcpp::R_PPC64_DTPREL16_HIGHER: | |
6727 | case elfcpp::R_PPC64_DTPREL16_HIGHERA: | |
6728 | case elfcpp::R_PPC64_DTPREL16_HIGHEST: | |
6729 | case elfcpp::R_PPC64_DTPREL16_HIGHESTA: | |
dd93cd0a AM |
6730 | case elfcpp::R_PPC64_TLSGD: |
6731 | case elfcpp::R_PPC64_TLSLD: | |
45965137 | 6732 | case elfcpp::R_PPC64_ADDR64_LOCAL: |
42cacb20 DE |
6733 | break; |
6734 | ||
6735 | case elfcpp::R_POWERPC_GOT16: | |
6736 | case elfcpp::R_POWERPC_GOT16_LO: | |
6737 | case elfcpp::R_POWERPC_GOT16_HI: | |
6738 | case elfcpp::R_POWERPC_GOT16_HA: | |
dd93cd0a AM |
6739 | case elfcpp::R_PPC64_GOT16_DS: |
6740 | case elfcpp::R_PPC64_GOT16_LO_DS: | |
42cacb20 | 6741 | { |
c9269dff | 6742 | // The symbol requires a GOT entry. |
dd93cd0a AM |
6743 | Output_data_got_powerpc<size, big_endian>* got |
6744 | = target->got_section(symtab, layout); | |
6745 | unsigned int r_sym = elfcpp::elf_r_sym<size>(reloc.get_r_info()); | |
42cacb20 | 6746 | |
e5d5f5ed | 6747 | if (!parameters->options().output_is_position_independent()) |
42cacb20 | 6748 | { |
b01a4b04 AM |
6749 | if (is_ifunc |
6750 | && (size == 32 || target->abiversion() >= 2)) | |
e5d5f5ed AM |
6751 | got->add_local_plt(object, r_sym, GOT_TYPE_STANDARD); |
6752 | else | |
6753 | got->add_local(object, r_sym, GOT_TYPE_STANDARD); | |
6754 | } | |
6755 | else if (!object->local_has_got_offset(r_sym, GOT_TYPE_STANDARD)) | |
6756 | { | |
6757 | // If we are generating a shared object or a pie, this | |
6758 | // symbol's GOT entry will be set by a dynamic relocation. | |
6759 | unsigned int off; | |
6760 | off = got->add_constant(0); | |
6761 | object->set_local_got_offset(r_sym, GOT_TYPE_STANDARD, off); | |
42cacb20 | 6762 | |
b3ccdeb5 AM |
6763 | Reloc_section* rela_dyn = target->rela_dyn_section(symtab, layout, |
6764 | is_ifunc); | |
6765 | unsigned int dynrel = (is_ifunc ? elfcpp::R_POWERPC_IRELATIVE | |
6766 | : elfcpp::R_POWERPC_RELATIVE); | |
e5d5f5ed | 6767 | rela_dyn->add_local_relative(object, r_sym, dynrel, |
c9824451 | 6768 | got, off, 0, false); |
2e702c99 | 6769 | } |
42cacb20 DE |
6770 | } |
6771 | break; | |
6772 | ||
cf43a2fe AM |
6773 | case elfcpp::R_PPC64_TOC16: |
6774 | case elfcpp::R_PPC64_TOC16_LO: | |
6775 | case elfcpp::R_PPC64_TOC16_HI: | |
6776 | case elfcpp::R_PPC64_TOC16_HA: | |
6777 | case elfcpp::R_PPC64_TOC16_DS: | |
6778 | case elfcpp::R_PPC64_TOC16_LO_DS: | |
42cacb20 DE |
6779 | // We need a GOT section. |
6780 | target->got_section(symtab, layout); | |
6781 | break; | |
6782 | ||
dd93cd0a AM |
6783 | case elfcpp::R_POWERPC_GOT_TLSGD16: |
6784 | case elfcpp::R_POWERPC_GOT_TLSGD16_LO: | |
6785 | case elfcpp::R_POWERPC_GOT_TLSGD16_HI: | |
6786 | case elfcpp::R_POWERPC_GOT_TLSGD16_HA: | |
6787 | { | |
6788 | const tls::Tls_optimization tls_type = target->optimize_tls_gd(true); | |
6789 | if (tls_type == tls::TLSOPT_NONE) | |
6790 | { | |
6791 | Output_data_got_powerpc<size, big_endian>* got | |
6792 | = target->got_section(symtab, layout); | |
6793 | unsigned int r_sym = elfcpp::elf_r_sym<size>(reloc.get_r_info()); | |
bd73a62d AM |
6794 | Reloc_section* rela_dyn = target->rela_dyn_section(layout); |
6795 | got->add_local_tls_pair(object, r_sym, GOT_TYPE_TLSGD, | |
6796 | rela_dyn, elfcpp::R_POWERPC_DTPMOD); | |
dd93cd0a AM |
6797 | } |
6798 | else if (tls_type == tls::TLSOPT_TO_LE) | |
6799 | { | |
6800 | // no GOT relocs needed for Local Exec. | |
6801 | } | |
6802 | else | |
6803 | gold_unreachable(); | |
6804 | } | |
42cacb20 DE |
6805 | break; |
6806 | ||
dd93cd0a AM |
6807 | case elfcpp::R_POWERPC_GOT_TLSLD16: |
6808 | case elfcpp::R_POWERPC_GOT_TLSLD16_LO: | |
6809 | case elfcpp::R_POWERPC_GOT_TLSLD16_HI: | |
6810 | case elfcpp::R_POWERPC_GOT_TLSLD16_HA: | |
6811 | { | |
6812 | const tls::Tls_optimization tls_type = target->optimize_tls_ld(); | |
6813 | if (tls_type == tls::TLSOPT_NONE) | |
6814 | target->tlsld_got_offset(symtab, layout, object); | |
6815 | else if (tls_type == tls::TLSOPT_TO_LE) | |
6816 | { | |
6817 | // no GOT relocs needed for Local Exec. | |
7404fe1b AM |
6818 | if (parameters->options().emit_relocs()) |
6819 | { | |
6820 | Output_section* os = layout->tls_segment()->first_section(); | |
6821 | gold_assert(os != NULL); | |
6822 | os->set_needs_symtab_index(); | |
6823 | } | |
dd93cd0a AM |
6824 | } |
6825 | else | |
6826 | gold_unreachable(); | |
6827 | } | |
42cacb20 | 6828 | break; |
42cacb20 | 6829 | |
dd93cd0a AM |
6830 | case elfcpp::R_POWERPC_GOT_DTPREL16: |
6831 | case elfcpp::R_POWERPC_GOT_DTPREL16_LO: | |
6832 | case elfcpp::R_POWERPC_GOT_DTPREL16_HI: | |
6833 | case elfcpp::R_POWERPC_GOT_DTPREL16_HA: | |
6834 | { | |
6835 | Output_data_got_powerpc<size, big_endian>* got | |
6836 | = target->got_section(symtab, layout); | |
6837 | unsigned int r_sym = elfcpp::elf_r_sym<size>(reloc.get_r_info()); | |
bd73a62d | 6838 | got->add_local_tls(object, r_sym, GOT_TYPE_DTPREL); |
dd93cd0a AM |
6839 | } |
6840 | break; | |
42cacb20 | 6841 | |
dd93cd0a AM |
6842 | case elfcpp::R_POWERPC_GOT_TPREL16: |
6843 | case elfcpp::R_POWERPC_GOT_TPREL16_LO: | |
6844 | case elfcpp::R_POWERPC_GOT_TPREL16_HI: | |
6845 | case elfcpp::R_POWERPC_GOT_TPREL16_HA: | |
6846 | { | |
6847 | const tls::Tls_optimization tls_type = target->optimize_tls_ie(true); | |
6848 | if (tls_type == tls::TLSOPT_NONE) | |
6849 | { | |
dd93cd0a | 6850 | unsigned int r_sym = elfcpp::elf_r_sym<size>(reloc.get_r_info()); |
acc276d8 AM |
6851 | if (!object->local_has_got_offset(r_sym, GOT_TYPE_TPREL)) |
6852 | { | |
6853 | Output_data_got_powerpc<size, big_endian>* got | |
6854 | = target->got_section(symtab, layout); | |
6855 | unsigned int off = got->add_constant(0); | |
6856 | object->set_local_got_offset(r_sym, GOT_TYPE_TPREL, off); | |
6857 | ||
6858 | Reloc_section* rela_dyn = target->rela_dyn_section(layout); | |
6859 | rela_dyn->add_symbolless_local_addend(object, r_sym, | |
6860 | elfcpp::R_POWERPC_TPREL, | |
6861 | got, off, 0); | |
6862 | } | |
dd93cd0a AM |
6863 | } |
6864 | else if (tls_type == tls::TLSOPT_TO_LE) | |
6865 | { | |
6866 | // no GOT relocs needed for Local Exec. | |
6867 | } | |
6868 | else | |
6869 | gold_unreachable(); | |
6870 | } | |
6871 | break; | |
6872 | ||
6873 | default: | |
6874 | unsupported_reloc_local(object, r_type); | |
6875 | break; | |
6876 | } | |
d8f5a274 | 6877 | |
5edad15d AM |
6878 | if (size == 64 |
6879 | && parameters->options().toc_optimize()) | |
6880 | { | |
6881 | if (data_shndx == ppc_object->toc_shndx()) | |
6882 | { | |
6883 | bool ok = true; | |
6884 | if (r_type != elfcpp::R_PPC64_ADDR64 | |
6885 | || (is_ifunc && target->abiversion() < 2)) | |
6886 | ok = false; | |
6887 | else if (parameters->options().output_is_position_independent()) | |
6888 | { | |
6889 | if (is_ifunc) | |
6890 | ok = false; | |
6891 | else | |
6892 | { | |
6893 | unsigned int shndx = lsym.get_st_shndx(); | |
6894 | if (shndx >= elfcpp::SHN_LORESERVE | |
6895 | && shndx != elfcpp::SHN_XINDEX) | |
6896 | ok = false; | |
6897 | } | |
6898 | } | |
6899 | if (!ok) | |
6900 | ppc_object->set_no_toc_opt(reloc.get_r_offset()); | |
6901 | } | |
6902 | ||
6903 | enum {no_check, check_lo, check_ha} insn_check; | |
6904 | switch (r_type) | |
6905 | { | |
6906 | default: | |
6907 | insn_check = no_check; | |
6908 | break; | |
6909 | ||
6910 | case elfcpp::R_POWERPC_GOT_TLSLD16_HA: | |
6911 | case elfcpp::R_POWERPC_GOT_TLSGD16_HA: | |
6912 | case elfcpp::R_POWERPC_GOT_TPREL16_HA: | |
6913 | case elfcpp::R_POWERPC_GOT_DTPREL16_HA: | |
6914 | case elfcpp::R_POWERPC_GOT16_HA: | |
6915 | case elfcpp::R_PPC64_TOC16_HA: | |
6916 | insn_check = check_ha; | |
6917 | break; | |
6918 | ||
6919 | case elfcpp::R_POWERPC_GOT_TLSLD16_LO: | |
6920 | case elfcpp::R_POWERPC_GOT_TLSGD16_LO: | |
6921 | case elfcpp::R_POWERPC_GOT_TPREL16_LO: | |
6922 | case elfcpp::R_POWERPC_GOT_DTPREL16_LO: | |
6923 | case elfcpp::R_POWERPC_GOT16_LO: | |
6924 | case elfcpp::R_PPC64_GOT16_LO_DS: | |
6925 | case elfcpp::R_PPC64_TOC16_LO: | |
6926 | case elfcpp::R_PPC64_TOC16_LO_DS: | |
6927 | insn_check = check_lo; | |
6928 | break; | |
6929 | } | |
6930 | ||
6931 | section_size_type slen; | |
6932 | const unsigned char* view = NULL; | |
6933 | if (insn_check != no_check) | |
6934 | { | |
6935 | view = ppc_object->section_contents(data_shndx, &slen, false); | |
6936 | section_size_type off = | |
6937 | convert_to_section_size_type(reloc.get_r_offset()) & -4; | |
6938 | if (off < slen) | |
6939 | { | |
6940 | uint32_t insn = elfcpp::Swap<32, big_endian>::readval(view + off); | |
6941 | if (insn_check == check_lo | |
6942 | ? !ok_lo_toc_insn(insn, r_type) | |
6943 | : ((insn & ((0x3f << 26) | 0x1f << 16)) | |
6944 | != ((15u << 26) | (2 << 16)) /* addis rt,2,imm */)) | |
6945 | { | |
6946 | ppc_object->set_no_toc_opt(); | |
6947 | gold_warning(_("%s: toc optimization is not supported " | |
6948 | "for %#08x instruction"), | |
6949 | ppc_object->name().c_str(), insn); | |
6950 | } | |
6951 | } | |
6952 | } | |
6953 | ||
6954 | switch (r_type) | |
6955 | { | |
6956 | default: | |
6957 | break; | |
6958 | case elfcpp::R_PPC64_TOC16: | |
6959 | case elfcpp::R_PPC64_TOC16_LO: | |
6960 | case elfcpp::R_PPC64_TOC16_HI: | |
6961 | case elfcpp::R_PPC64_TOC16_HA: | |
6962 | case elfcpp::R_PPC64_TOC16_DS: | |
6963 | case elfcpp::R_PPC64_TOC16_LO_DS: | |
6964 | unsigned int shndx = lsym.get_st_shndx(); | |
6965 | unsigned int r_sym = elfcpp::elf_r_sym<size>(reloc.get_r_info()); | |
6966 | bool is_ordinary; | |
6967 | shndx = ppc_object->adjust_sym_shndx(r_sym, shndx, &is_ordinary); | |
6968 | if (is_ordinary && shndx == ppc_object->toc_shndx()) | |
6969 | { | |
412294da | 6970 | Address dst_off = lsym.get_st_value() + reloc.get_r_addend(); |
5edad15d AM |
6971 | if (dst_off < ppc_object->section_size(shndx)) |
6972 | { | |
6973 | bool ok = false; | |
6974 | if (r_type == elfcpp::R_PPC64_TOC16_HA) | |
6975 | ok = true; | |
6976 | else if (r_type == elfcpp::R_PPC64_TOC16_LO_DS) | |
6977 | { | |
6978 | // Need to check that the insn is a ld | |
6979 | if (!view) | |
6980 | view = ppc_object->section_contents(data_shndx, | |
6981 | &slen, | |
6982 | false); | |
6983 | section_size_type off = | |
6984 | (convert_to_section_size_type(reloc.get_r_offset()) | |
6985 | + (big_endian ? -2 : 3)); | |
6986 | if (off < slen | |
6987 | && (view[off] & (0x3f << 2)) == 58u << 2) | |
6988 | ok = true; | |
6989 | } | |
6990 | if (!ok) | |
6991 | ppc_object->set_no_toc_opt(dst_off); | |
6992 | } | |
6993 | } | |
6994 | break; | |
6995 | } | |
6996 | } | |
6997 | ||
f159cdb6 AM |
6998 | if (size == 32) |
6999 | { | |
7000 | switch (r_type) | |
7001 | { | |
7002 | case elfcpp::R_POWERPC_REL32: | |
7003 | if (ppc_object->got2_shndx() != 0 | |
7004 | && parameters->options().output_is_position_independent()) | |
7005 | { | |
7006 | unsigned int shndx = lsym.get_st_shndx(); | |
7007 | unsigned int r_sym = elfcpp::elf_r_sym<size>(reloc.get_r_info()); | |
7008 | bool is_ordinary; | |
7009 | shndx = ppc_object->adjust_sym_shndx(r_sym, shndx, &is_ordinary); | |
7010 | if (is_ordinary && shndx == ppc_object->got2_shndx() | |
7011 | && (ppc_object->section_flags(data_shndx) | |
7012 | & elfcpp::SHF_EXECINSTR) != 0) | |
7013 | gold_error(_("%s: unsupported -mbss-plt code"), | |
7014 | ppc_object->name().c_str()); | |
7015 | } | |
7016 | break; | |
7017 | default: | |
7018 | break; | |
7019 | } | |
7020 | } | |
7021 | ||
d8f5a274 AM |
7022 | switch (r_type) |
7023 | { | |
7024 | case elfcpp::R_POWERPC_GOT_TLSLD16: | |
7025 | case elfcpp::R_POWERPC_GOT_TLSGD16: | |
7026 | case elfcpp::R_POWERPC_GOT_TPREL16: | |
7027 | case elfcpp::R_POWERPC_GOT_DTPREL16: | |
7028 | case elfcpp::R_POWERPC_GOT16: | |
7029 | case elfcpp::R_PPC64_GOT16_DS: | |
7030 | case elfcpp::R_PPC64_TOC16: | |
7031 | case elfcpp::R_PPC64_TOC16_DS: | |
7032 | ppc_object->set_has_small_toc_reloc(); | |
7033 | default: | |
7034 | break; | |
7035 | } | |
dd93cd0a AM |
7036 | } |
7037 | ||
7038 | // Report an unsupported relocation against a global symbol. | |
7039 | ||
7040 | template<int size, bool big_endian> | |
7041 | void | |
7042 | Target_powerpc<size, big_endian>::Scan::unsupported_reloc_global( | |
7043 | Sized_relobj_file<size, big_endian>* object, | |
7044 | unsigned int r_type, | |
7045 | Symbol* gsym) | |
7046 | { | |
42cacb20 DE |
7047 | gold_error(_("%s: unsupported reloc %u against global symbol %s"), |
7048 | object->name().c_str(), r_type, gsym->demangled_name().c_str()); | |
7049 | } | |
7050 | ||
7051 | // Scan a relocation for a global symbol. | |
7052 | ||
7053 | template<int size, bool big_endian> | |
7054 | inline void | |
7055 | Target_powerpc<size, big_endian>::Scan::global( | |
d83ce4e3 AM |
7056 | Symbol_table* symtab, |
7057 | Layout* layout, | |
7058 | Target_powerpc<size, big_endian>* target, | |
7059 | Sized_relobj_file<size, big_endian>* object, | |
7060 | unsigned int data_shndx, | |
7061 | Output_section* output_section, | |
7062 | const elfcpp::Rela<size, big_endian>& reloc, | |
7063 | unsigned int r_type, | |
7064 | Symbol* gsym) | |
42cacb20 | 7065 | { |
34e0882b AM |
7066 | if (this->maybe_skip_tls_get_addr_call(target, r_type, gsym) |
7067 | == Track_tls::SKIP) | |
e3deeb9c AM |
7068 | return; |
7069 | ||
34e0882b AM |
7070 | if (target->replace_tls_get_addr(gsym)) |
7071 | // Change a __tls_get_addr reference to __tls_get_addr_opt | |
7072 | // so dynamic relocs are emitted against the latter symbol. | |
7073 | gsym = target->tls_get_addr_opt(); | |
7074 | ||
e3deeb9c AM |
7075 | if ((size == 64 && r_type == elfcpp::R_PPC64_TLSGD) |
7076 | || (size == 32 && r_type == elfcpp::R_PPC_TLSGD)) | |
7077 | { | |
7078 | this->expect_tls_get_addr_call(); | |
7079 | const bool final = gsym->final_value_is_known(); | |
7080 | const tls::Tls_optimization tls_type = target->optimize_tls_gd(final); | |
7081 | if (tls_type != tls::TLSOPT_NONE) | |
7082 | this->skip_next_tls_get_addr_call(); | |
7083 | } | |
7084 | else if ((size == 64 && r_type == elfcpp::R_PPC64_TLSLD) | |
7085 | || (size == 32 && r_type == elfcpp::R_PPC_TLSLD)) | |
7086 | { | |
7087 | this->expect_tls_get_addr_call(); | |
7088 | const tls::Tls_optimization tls_type = target->optimize_tls_ld(); | |
7089 | if (tls_type != tls::TLSOPT_NONE) | |
7090 | this->skip_next_tls_get_addr_call(); | |
7091 | } | |
7092 | ||
dd93cd0a AM |
7093 | Powerpc_relobj<size, big_endian>* ppc_object |
7094 | = static_cast<Powerpc_relobj<size, big_endian>*>(object); | |
7095 | ||
e5d5f5ed | 7096 | // A STT_GNU_IFUNC symbol may require a PLT entry. |
b3ccdeb5 | 7097 | bool is_ifunc = gsym->type() == elfcpp::STT_GNU_IFUNC; |
9055360d AM |
7098 | bool pushed_ifunc = false; |
7099 | if (is_ifunc && this->reloc_needs_plt_for_ifunc(target, object, r_type, true)) | |
ec661b9d | 7100 | { |
0e123f69 | 7101 | unsigned int r_sym = elfcpp::elf_r_sym<size>(reloc.get_r_info()); |
ec661b9d | 7102 | target->push_branch(ppc_object, data_shndx, reloc.get_r_offset(), |
0e123f69 | 7103 | r_type, r_sym, reloc.get_r_addend()); |
ec661b9d | 7104 | target->make_plt_entry(symtab, layout, gsym); |
9055360d | 7105 | pushed_ifunc = true; |
ec661b9d | 7106 | } |
e5d5f5ed | 7107 | |
42cacb20 DE |
7108 | switch (r_type) |
7109 | { | |
7110 | case elfcpp::R_POWERPC_NONE: | |
7111 | case elfcpp::R_POWERPC_GNU_VTINHERIT: | |
7112 | case elfcpp::R_POWERPC_GNU_VTENTRY: | |
cf43a2fe | 7113 | case elfcpp::R_PPC_LOCAL24PC: |
7404fe1b | 7114 | case elfcpp::R_POWERPC_TLS: |
549dba71 | 7115 | case elfcpp::R_PPC64_ENTRY: |
dd93cd0a AM |
7116 | break; |
7117 | ||
7118 | case elfcpp::R_PPC64_TOC: | |
7119 | { | |
7120 | Output_data_got_powerpc<size, big_endian>* got | |
7121 | = target->got_section(symtab, layout); | |
7122 | if (parameters->options().output_is_position_independent()) | |
7123 | { | |
bfdfa4cd AM |
7124 | Address off = reloc.get_r_offset(); |
7125 | if (size == 64 | |
7126 | && data_shndx == ppc_object->opd_shndx() | |
7127 | && ppc_object->get_opd_discard(off - 8)) | |
7128 | break; | |
7129 | ||
dd93cd0a AM |
7130 | Reloc_section* rela_dyn = target->rela_dyn_section(layout); |
7131 | Powerpc_relobj<size, big_endian>* symobj = ppc_object; | |
7132 | if (data_shndx != ppc_object->opd_shndx()) | |
7133 | symobj = static_cast | |
7134 | <Powerpc_relobj<size, big_endian>*>(gsym->object()); | |
7135 | rela_dyn->add_output_section_relative(got->output_section(), | |
7136 | elfcpp::R_POWERPC_RELATIVE, | |
7137 | output_section, | |
bfdfa4cd | 7138 | object, data_shndx, off, |
dd93cd0a AM |
7139 | symobj->toc_base_offset()); |
7140 | } | |
7141 | } | |
42cacb20 DE |
7142 | break; |
7143 | ||
c9269dff | 7144 | case elfcpp::R_PPC64_ADDR64: |
bfdfa4cd | 7145 | if (size == 64 |
9055360d | 7146 | && target->abiversion() < 2 |
bfdfa4cd AM |
7147 | && data_shndx == ppc_object->opd_shndx() |
7148 | && (gsym->is_defined_in_discarded_section() | |
7149 | || gsym->object() != object)) | |
7150 | { | |
7151 | ppc_object->set_opd_discard(reloc.get_r_offset()); | |
7152 | break; | |
7153 | } | |
d8e90251 | 7154 | // Fall through. |
dd93cd0a | 7155 | case elfcpp::R_PPC64_UADDR64: |
c9269dff | 7156 | case elfcpp::R_POWERPC_ADDR32: |
dd93cd0a AM |
7157 | case elfcpp::R_POWERPC_UADDR32: |
7158 | case elfcpp::R_POWERPC_ADDR24: | |
42cacb20 DE |
7159 | case elfcpp::R_POWERPC_ADDR16: |
7160 | case elfcpp::R_POWERPC_ADDR16_LO: | |
7161 | case elfcpp::R_POWERPC_ADDR16_HI: | |
7162 | case elfcpp::R_POWERPC_ADDR16_HA: | |
dd93cd0a | 7163 | case elfcpp::R_POWERPC_UADDR16: |
f9c6b907 AM |
7164 | case elfcpp::R_PPC64_ADDR16_HIGH: |
7165 | case elfcpp::R_PPC64_ADDR16_HIGHA: | |
dd93cd0a AM |
7166 | case elfcpp::R_PPC64_ADDR16_HIGHER: |
7167 | case elfcpp::R_PPC64_ADDR16_HIGHERA: | |
7168 | case elfcpp::R_PPC64_ADDR16_HIGHEST: | |
7169 | case elfcpp::R_PPC64_ADDR16_HIGHESTA: | |
7170 | case elfcpp::R_PPC64_ADDR16_DS: | |
7171 | case elfcpp::R_PPC64_ADDR16_LO_DS: | |
7172 | case elfcpp::R_POWERPC_ADDR14: | |
7173 | case elfcpp::R_POWERPC_ADDR14_BRTAKEN: | |
7174 | case elfcpp::R_POWERPC_ADDR14_BRNTAKEN: | |
42cacb20 | 7175 | { |
c9269dff AM |
7176 | // Make a PLT entry if necessary. |
7177 | if (gsym->needs_plt_entry()) | |
7178 | { | |
9055360d AM |
7179 | // Since this is not a PC-relative relocation, we may be |
7180 | // taking the address of a function. In that case we need to | |
7181 | // set the entry in the dynamic symbol table to the address of | |
7182 | // the PLT call stub. | |
7183 | bool need_ifunc_plt = false; | |
7184 | if ((size == 32 || target->abiversion() >= 2) | |
7185 | && gsym->is_from_dynobj() | |
7186 | && !parameters->options().output_is_position_independent()) | |
7187 | { | |
7188 | gsym->set_needs_dynsym_value(); | |
7189 | need_ifunc_plt = true; | |
7190 | } | |
7191 | if (!is_ifunc || (!pushed_ifunc && need_ifunc_plt)) | |
b3ccdeb5 | 7192 | { |
0e123f69 | 7193 | unsigned int r_sym = elfcpp::elf_r_sym<size>(reloc.get_r_info()); |
b3ccdeb5 | 7194 | target->push_branch(ppc_object, data_shndx, |
0e123f69 | 7195 | reloc.get_r_offset(), r_type, r_sym, |
b3ccdeb5 AM |
7196 | reloc.get_r_addend()); |
7197 | target->make_plt_entry(symtab, layout, gsym); | |
7198 | } | |
c9269dff AM |
7199 | } |
7200 | // Make a dynamic relocation if necessary. | |
88b8e639 | 7201 | if (gsym->needs_dynamic_reloc(Scan::get_reference_flags(r_type, target)) |
9055360d | 7202 | || (size == 64 && is_ifunc && target->abiversion() < 2)) |
c9269dff | 7203 | { |
a82bef93 ST |
7204 | if (!parameters->options().output_is_position_independent() |
7205 | && gsym->may_need_copy_reloc()) | |
c9269dff AM |
7206 | { |
7207 | target->copy_reloc(symtab, layout, object, | |
7208 | data_shndx, output_section, gsym, reloc); | |
7209 | } | |
9055360d AM |
7210 | else if ((((size == 32 |
7211 | && r_type == elfcpp::R_POWERPC_ADDR32) | |
7212 | || (size == 64 | |
7213 | && r_type == elfcpp::R_PPC64_ADDR64 | |
7214 | && target->abiversion() >= 2)) | |
627b30b7 AM |
7215 | && gsym->can_use_relative_reloc(false) |
7216 | && !(gsym->visibility() == elfcpp::STV_PROTECTED | |
7217 | && parameters->options().shared())) | |
7218 | || (size == 64 | |
7219 | && r_type == elfcpp::R_PPC64_ADDR64 | |
9055360d | 7220 | && target->abiversion() < 2 |
627b30b7 AM |
7221 | && (gsym->can_use_relative_reloc(false) |
7222 | || data_shndx == ppc_object->opd_shndx()))) | |
2e702c99 | 7223 | { |
b3ccdeb5 AM |
7224 | Reloc_section* rela_dyn |
7225 | = target->rela_dyn_section(symtab, layout, is_ifunc); | |
7226 | unsigned int dynrel = (is_ifunc ? elfcpp::R_POWERPC_IRELATIVE | |
7227 | : elfcpp::R_POWERPC_RELATIVE); | |
e5d5f5ed AM |
7228 | rela_dyn->add_symbolless_global_addend( |
7229 | gsym, dynrel, output_section, object, data_shndx, | |
7230 | reloc.get_r_offset(), reloc.get_r_addend()); | |
2e702c99 RM |
7231 | } |
7232 | else | |
7233 | { | |
b3ccdeb5 AM |
7234 | Reloc_section* rela_dyn |
7235 | = target->rela_dyn_section(symtab, layout, is_ifunc); | |
42cacb20 | 7236 | check_non_pic(object, r_type); |
dd93cd0a AM |
7237 | rela_dyn->add_global(gsym, r_type, output_section, |
7238 | object, data_shndx, | |
7239 | reloc.get_r_offset(), | |
7240 | reloc.get_r_addend()); | |
5edad15d AM |
7241 | |
7242 | if (size == 64 | |
7243 | && parameters->options().toc_optimize() | |
7244 | && data_shndx == ppc_object->toc_shndx()) | |
7245 | ppc_object->set_no_toc_opt(reloc.get_r_offset()); | |
2e702c99 RM |
7246 | } |
7247 | } | |
42cacb20 DE |
7248 | } |
7249 | break; | |
7250 | ||
cf43a2fe | 7251 | case elfcpp::R_PPC_PLTREL24: |
42cacb20 | 7252 | case elfcpp::R_POWERPC_REL24: |
b3ccdeb5 AM |
7253 | if (!is_ifunc) |
7254 | { | |
0e123f69 | 7255 | unsigned int r_sym = elfcpp::elf_r_sym<size>(reloc.get_r_info()); |
b3ccdeb5 | 7256 | target->push_branch(ppc_object, data_shndx, reloc.get_r_offset(), |
0e123f69 | 7257 | r_type, r_sym, reloc.get_r_addend()); |
b3ccdeb5 AM |
7258 | if (gsym->needs_plt_entry() |
7259 | || (!gsym->final_value_is_known() | |
7260 | && (gsym->is_undefined() | |
7261 | || gsym->is_from_dynobj() | |
7262 | || gsym->is_preemptible()))) | |
7263 | target->make_plt_entry(symtab, layout, gsym); | |
7264 | } | |
d8e90251 | 7265 | // Fall through. |
42cacb20 | 7266 | |
3ea0a085 | 7267 | case elfcpp::R_PPC64_REL64: |
dd93cd0a | 7268 | case elfcpp::R_POWERPC_REL32: |
3ea0a085 | 7269 | // Make a dynamic relocation if necessary. |
88b8e639 | 7270 | if (gsym->needs_dynamic_reloc(Scan::get_reference_flags(r_type, target))) |
3ea0a085 | 7271 | { |
a82bef93 ST |
7272 | if (!parameters->options().output_is_position_independent() |
7273 | && gsym->may_need_copy_reloc()) | |
3ea0a085 AM |
7274 | { |
7275 | target->copy_reloc(symtab, layout, object, | |
7276 | data_shndx, output_section, gsym, | |
7277 | reloc); | |
7278 | } | |
7279 | else | |
7280 | { | |
b3ccdeb5 AM |
7281 | Reloc_section* rela_dyn |
7282 | = target->rela_dyn_section(symtab, layout, is_ifunc); | |
3ea0a085 AM |
7283 | check_non_pic(object, r_type); |
7284 | rela_dyn->add_global(gsym, r_type, output_section, object, | |
7285 | data_shndx, reloc.get_r_offset(), | |
7286 | reloc.get_r_addend()); | |
7287 | } | |
7288 | } | |
7289 | break; | |
7290 | ||
ec661b9d AM |
7291 | case elfcpp::R_POWERPC_REL14: |
7292 | case elfcpp::R_POWERPC_REL14_BRTAKEN: | |
7293 | case elfcpp::R_POWERPC_REL14_BRNTAKEN: | |
b3ccdeb5 | 7294 | if (!is_ifunc) |
0e123f69 AM |
7295 | { |
7296 | unsigned int r_sym = elfcpp::elf_r_sym<size>(reloc.get_r_info()); | |
7297 | target->push_branch(ppc_object, data_shndx, reloc.get_r_offset(), | |
7298 | r_type, r_sym, reloc.get_r_addend()); | |
7299 | } | |
ec661b9d AM |
7300 | break; |
7301 | ||
7e57d19e AM |
7302 | case elfcpp::R_PPC64_TOCSAVE: |
7303 | // R_PPC64_TOCSAVE follows a call instruction to indicate the | |
7304 | // caller has already saved r2 and thus a plt call stub need not | |
7305 | // save r2. | |
7306 | if (size == 64 | |
7307 | && target->mark_pltcall(ppc_object, data_shndx, | |
7308 | reloc.get_r_offset() - 4, symtab)) | |
7309 | { | |
7310 | unsigned int r_sym = elfcpp::elf_r_sym<size>(reloc.get_r_info()); | |
7311 | bool is_ordinary; | |
7312 | unsigned int shndx = gsym->shndx(&is_ordinary); | |
7313 | if (!is_ordinary) | |
7314 | object->error(_("tocsave symbol %u has bad shndx %u"), | |
7315 | r_sym, shndx); | |
7316 | else | |
7317 | { | |
7318 | Sized_symbol<size>* sym = symtab->get_sized_symbol<size>(gsym); | |
7319 | target->add_tocsave(ppc_object, shndx, | |
7320 | sym->value() + reloc.get_r_addend()); | |
7321 | } | |
7322 | } | |
7323 | break; | |
7324 | ||
6ce78956 AM |
7325 | case elfcpp::R_POWERPC_REL16: |
7326 | case elfcpp::R_POWERPC_REL16_LO: | |
7327 | case elfcpp::R_POWERPC_REL16_HI: | |
7328 | case elfcpp::R_POWERPC_REL16_HA: | |
a680de9a | 7329 | case elfcpp::R_POWERPC_REL16DX_HA: |
dd93cd0a | 7330 | case elfcpp::R_POWERPC_SECTOFF: |
dd93cd0a | 7331 | case elfcpp::R_POWERPC_SECTOFF_LO: |
dd93cd0a | 7332 | case elfcpp::R_POWERPC_SECTOFF_HI: |
dd93cd0a | 7333 | case elfcpp::R_POWERPC_SECTOFF_HA: |
f9c6b907 AM |
7334 | case elfcpp::R_PPC64_SECTOFF_DS: |
7335 | case elfcpp::R_PPC64_SECTOFF_LO_DS: | |
7336 | case elfcpp::R_POWERPC_TPREL16: | |
7337 | case elfcpp::R_POWERPC_TPREL16_LO: | |
7338 | case elfcpp::R_POWERPC_TPREL16_HI: | |
dd93cd0a | 7339 | case elfcpp::R_POWERPC_TPREL16_HA: |
f9c6b907 AM |
7340 | case elfcpp::R_PPC64_TPREL16_DS: |
7341 | case elfcpp::R_PPC64_TPREL16_LO_DS: | |
7342 | case elfcpp::R_PPC64_TPREL16_HIGH: | |
7343 | case elfcpp::R_PPC64_TPREL16_HIGHA: | |
dd93cd0a | 7344 | case elfcpp::R_PPC64_TPREL16_HIGHER: |
dd93cd0a | 7345 | case elfcpp::R_PPC64_TPREL16_HIGHERA: |
dd93cd0a | 7346 | case elfcpp::R_PPC64_TPREL16_HIGHEST: |
dd93cd0a | 7347 | case elfcpp::R_PPC64_TPREL16_HIGHESTA: |
f9c6b907 AM |
7348 | case elfcpp::R_POWERPC_DTPREL16: |
7349 | case elfcpp::R_POWERPC_DTPREL16_LO: | |
7350 | case elfcpp::R_POWERPC_DTPREL16_HI: | |
7351 | case elfcpp::R_POWERPC_DTPREL16_HA: | |
dd93cd0a AM |
7352 | case elfcpp::R_PPC64_DTPREL16_DS: |
7353 | case elfcpp::R_PPC64_DTPREL16_LO_DS: | |
f9c6b907 AM |
7354 | case elfcpp::R_PPC64_DTPREL16_HIGH: |
7355 | case elfcpp::R_PPC64_DTPREL16_HIGHA: | |
7356 | case elfcpp::R_PPC64_DTPREL16_HIGHER: | |
7357 | case elfcpp::R_PPC64_DTPREL16_HIGHERA: | |
7358 | case elfcpp::R_PPC64_DTPREL16_HIGHEST: | |
7359 | case elfcpp::R_PPC64_DTPREL16_HIGHESTA: | |
dd93cd0a AM |
7360 | case elfcpp::R_PPC64_TLSGD: |
7361 | case elfcpp::R_PPC64_TLSLD: | |
45965137 | 7362 | case elfcpp::R_PPC64_ADDR64_LOCAL: |
cf43a2fe AM |
7363 | break; |
7364 | ||
42cacb20 DE |
7365 | case elfcpp::R_POWERPC_GOT16: |
7366 | case elfcpp::R_POWERPC_GOT16_LO: | |
7367 | case elfcpp::R_POWERPC_GOT16_HI: | |
7368 | case elfcpp::R_POWERPC_GOT16_HA: | |
dd93cd0a AM |
7369 | case elfcpp::R_PPC64_GOT16_DS: |
7370 | case elfcpp::R_PPC64_GOT16_LO_DS: | |
42cacb20 | 7371 | { |
c9269dff AM |
7372 | // The symbol requires a GOT entry. |
7373 | Output_data_got_powerpc<size, big_endian>* got; | |
42cacb20 DE |
7374 | |
7375 | got = target->got_section(symtab, layout); | |
2e702c99 | 7376 | if (gsym->final_value_is_known()) |
2e702c99 | 7377 | { |
b01a4b04 AM |
7378 | if (is_ifunc |
7379 | && (size == 32 || target->abiversion() >= 2)) | |
e5d5f5ed AM |
7380 | got->add_global_plt(gsym, GOT_TYPE_STANDARD); |
7381 | else | |
7382 | got->add_global(gsym, GOT_TYPE_STANDARD); | |
7383 | } | |
7384 | else if (!gsym->has_got_offset(GOT_TYPE_STANDARD)) | |
7385 | { | |
7386 | // If we are generating a shared object or a pie, this | |
7387 | // symbol's GOT entry will be set by a dynamic relocation. | |
7388 | unsigned int off = got->add_constant(0); | |
7389 | gsym->set_got_offset(GOT_TYPE_STANDARD, off); | |
7390 | ||
b3ccdeb5 AM |
7391 | Reloc_section* rela_dyn |
7392 | = target->rela_dyn_section(symtab, layout, is_ifunc); | |
7393 | ||
e5d5f5ed | 7394 | if (gsym->can_use_relative_reloc(false) |
9055360d AM |
7395 | && !((size == 32 |
7396 | || target->abiversion() >= 2) | |
e5d5f5ed AM |
7397 | && gsym->visibility() == elfcpp::STV_PROTECTED |
7398 | && parameters->options().shared())) | |
2e702c99 | 7399 | { |
b3ccdeb5 AM |
7400 | unsigned int dynrel = (is_ifunc ? elfcpp::R_POWERPC_IRELATIVE |
7401 | : elfcpp::R_POWERPC_RELATIVE); | |
e5d5f5ed AM |
7402 | rela_dyn->add_global_relative(gsym, dynrel, got, off, 0, false); |
7403 | } | |
7404 | else | |
7405 | { | |
7406 | unsigned int dynrel = elfcpp::R_POWERPC_GLOB_DAT; | |
7407 | rela_dyn->add_global(gsym, dynrel, got, off, 0); | |
42cacb20 | 7408 | } |
2e702c99 | 7409 | } |
42cacb20 DE |
7410 | } |
7411 | break; | |
7412 | ||
cf43a2fe AM |
7413 | case elfcpp::R_PPC64_TOC16: |
7414 | case elfcpp::R_PPC64_TOC16_LO: | |
7415 | case elfcpp::R_PPC64_TOC16_HI: | |
7416 | case elfcpp::R_PPC64_TOC16_HA: | |
7417 | case elfcpp::R_PPC64_TOC16_DS: | |
7418 | case elfcpp::R_PPC64_TOC16_LO_DS: | |
42cacb20 DE |
7419 | // We need a GOT section. |
7420 | target->got_section(symtab, layout); | |
7421 | break; | |
7422 | ||
dd93cd0a AM |
7423 | case elfcpp::R_POWERPC_GOT_TLSGD16: |
7424 | case elfcpp::R_POWERPC_GOT_TLSGD16_LO: | |
7425 | case elfcpp::R_POWERPC_GOT_TLSGD16_HI: | |
7426 | case elfcpp::R_POWERPC_GOT_TLSGD16_HA: | |
7427 | { | |
7428 | const bool final = gsym->final_value_is_known(); | |
7429 | const tls::Tls_optimization tls_type = target->optimize_tls_gd(final); | |
7430 | if (tls_type == tls::TLSOPT_NONE) | |
7431 | { | |
7432 | Output_data_got_powerpc<size, big_endian>* got | |
7433 | = target->got_section(symtab, layout); | |
b3ccdeb5 AM |
7434 | Reloc_section* rela_dyn = target->rela_dyn_section(layout); |
7435 | got->add_global_pair_with_rel(gsym, GOT_TYPE_TLSGD, rela_dyn, | |
dd93cd0a AM |
7436 | elfcpp::R_POWERPC_DTPMOD, |
7437 | elfcpp::R_POWERPC_DTPREL); | |
7438 | } | |
7439 | else if (tls_type == tls::TLSOPT_TO_IE) | |
7440 | { | |
acc276d8 AM |
7441 | if (!gsym->has_got_offset(GOT_TYPE_TPREL)) |
7442 | { | |
7443 | Output_data_got_powerpc<size, big_endian>* got | |
7444 | = target->got_section(symtab, layout); | |
7445 | Reloc_section* rela_dyn = target->rela_dyn_section(layout); | |
7446 | if (gsym->is_undefined() | |
7447 | || gsym->is_from_dynobj()) | |
7448 | { | |
7449 | got->add_global_with_rel(gsym, GOT_TYPE_TPREL, rela_dyn, | |
7450 | elfcpp::R_POWERPC_TPREL); | |
7451 | } | |
7452 | else | |
7453 | { | |
7454 | unsigned int off = got->add_constant(0); | |
7455 | gsym->set_got_offset(GOT_TYPE_TPREL, off); | |
7456 | unsigned int dynrel = elfcpp::R_POWERPC_TPREL; | |
7457 | rela_dyn->add_symbolless_global_addend(gsym, dynrel, | |
7458 | got, off, 0); | |
7459 | } | |
7460 | } | |
dd93cd0a AM |
7461 | } |
7462 | else if (tls_type == tls::TLSOPT_TO_LE) | |
7463 | { | |
7464 | // no GOT relocs needed for Local Exec. | |
7465 | } | |
7466 | else | |
7467 | gold_unreachable(); | |
7468 | } | |
42cacb20 DE |
7469 | break; |
7470 | ||
dd93cd0a AM |
7471 | case elfcpp::R_POWERPC_GOT_TLSLD16: |
7472 | case elfcpp::R_POWERPC_GOT_TLSLD16_LO: | |
7473 | case elfcpp::R_POWERPC_GOT_TLSLD16_HI: | |
7474 | case elfcpp::R_POWERPC_GOT_TLSLD16_HA: | |
7475 | { | |
7476 | const tls::Tls_optimization tls_type = target->optimize_tls_ld(); | |
7477 | if (tls_type == tls::TLSOPT_NONE) | |
7478 | target->tlsld_got_offset(symtab, layout, object); | |
7479 | else if (tls_type == tls::TLSOPT_TO_LE) | |
7480 | { | |
7481 | // no GOT relocs needed for Local Exec. | |
7404fe1b AM |
7482 | if (parameters->options().emit_relocs()) |
7483 | { | |
7484 | Output_section* os = layout->tls_segment()->first_section(); | |
7485 | gold_assert(os != NULL); | |
7486 | os->set_needs_symtab_index(); | |
7487 | } | |
dd93cd0a AM |
7488 | } |
7489 | else | |
7490 | gold_unreachable(); | |
7491 | } | |
7492 | break; | |
7493 | ||
7494 | case elfcpp::R_POWERPC_GOT_DTPREL16: | |
7495 | case elfcpp::R_POWERPC_GOT_DTPREL16_LO: | |
7496 | case elfcpp::R_POWERPC_GOT_DTPREL16_HI: | |
7497 | case elfcpp::R_POWERPC_GOT_DTPREL16_HA: | |
7498 | { | |
7499 | Output_data_got_powerpc<size, big_endian>* got | |
7500 | = target->got_section(symtab, layout); | |
bd73a62d AM |
7501 | if (!gsym->final_value_is_known() |
7502 | && (gsym->is_from_dynobj() | |
7503 | || gsym->is_undefined() | |
7504 | || gsym->is_preemptible())) | |
7505 | got->add_global_with_rel(gsym, GOT_TYPE_DTPREL, | |
7506 | target->rela_dyn_section(layout), | |
7507 | elfcpp::R_POWERPC_DTPREL); | |
7508 | else | |
7509 | got->add_global_tls(gsym, GOT_TYPE_DTPREL); | |
dd93cd0a AM |
7510 | } |
7511 | break; | |
7512 | ||
7513 | case elfcpp::R_POWERPC_GOT_TPREL16: | |
7514 | case elfcpp::R_POWERPC_GOT_TPREL16_LO: | |
7515 | case elfcpp::R_POWERPC_GOT_TPREL16_HI: | |
7516 | case elfcpp::R_POWERPC_GOT_TPREL16_HA: | |
7517 | { | |
7518 | const bool final = gsym->final_value_is_known(); | |
7519 | const tls::Tls_optimization tls_type = target->optimize_tls_ie(final); | |
7520 | if (tls_type == tls::TLSOPT_NONE) | |
7521 | { | |
acc276d8 AM |
7522 | if (!gsym->has_got_offset(GOT_TYPE_TPREL)) |
7523 | { | |
7524 | Output_data_got_powerpc<size, big_endian>* got | |
7525 | = target->got_section(symtab, layout); | |
7526 | Reloc_section* rela_dyn = target->rela_dyn_section(layout); | |
7527 | if (gsym->is_undefined() | |
7528 | || gsym->is_from_dynobj()) | |
7529 | { | |
7530 | got->add_global_with_rel(gsym, GOT_TYPE_TPREL, rela_dyn, | |
7531 | elfcpp::R_POWERPC_TPREL); | |
7532 | } | |
7533 | else | |
7534 | { | |
7535 | unsigned int off = got->add_constant(0); | |
7536 | gsym->set_got_offset(GOT_TYPE_TPREL, off); | |
7537 | unsigned int dynrel = elfcpp::R_POWERPC_TPREL; | |
7538 | rela_dyn->add_symbolless_global_addend(gsym, dynrel, | |
7539 | got, off, 0); | |
7540 | } | |
7541 | } | |
dd93cd0a AM |
7542 | } |
7543 | else if (tls_type == tls::TLSOPT_TO_LE) | |
7544 | { | |
7545 | // no GOT relocs needed for Local Exec. | |
7546 | } | |
7547 | else | |
7548 | gold_unreachable(); | |
7549 | } | |
42cacb20 DE |
7550 | break; |
7551 | ||
7552 | default: | |
7553 | unsupported_reloc_global(object, r_type, gsym); | |
7554 | break; | |
7555 | } | |
d8f5a274 | 7556 | |
5edad15d AM |
7557 | if (size == 64 |
7558 | && parameters->options().toc_optimize()) | |
7559 | { | |
7560 | if (data_shndx == ppc_object->toc_shndx()) | |
7561 | { | |
7562 | bool ok = true; | |
7563 | if (r_type != elfcpp::R_PPC64_ADDR64 | |
7564 | || (is_ifunc && target->abiversion() < 2)) | |
7565 | ok = false; | |
7566 | else if (parameters->options().output_is_position_independent() | |
7567 | && (is_ifunc || gsym->is_absolute() || gsym->is_undefined())) | |
7568 | ok = false; | |
7569 | if (!ok) | |
7570 | ppc_object->set_no_toc_opt(reloc.get_r_offset()); | |
7571 | } | |
7572 | ||
7573 | enum {no_check, check_lo, check_ha} insn_check; | |
7574 | switch (r_type) | |
7575 | { | |
7576 | default: | |
7577 | insn_check = no_check; | |
7578 | break; | |
7579 | ||
7580 | case elfcpp::R_POWERPC_GOT_TLSLD16_HA: | |
7581 | case elfcpp::R_POWERPC_GOT_TLSGD16_HA: | |
7582 | case elfcpp::R_POWERPC_GOT_TPREL16_HA: | |
7583 | case elfcpp::R_POWERPC_GOT_DTPREL16_HA: | |
7584 | case elfcpp::R_POWERPC_GOT16_HA: | |
7585 | case elfcpp::R_PPC64_TOC16_HA: | |
7586 | insn_check = check_ha; | |
7587 | break; | |
7588 | ||
7589 | case elfcpp::R_POWERPC_GOT_TLSLD16_LO: | |
7590 | case elfcpp::R_POWERPC_GOT_TLSGD16_LO: | |
7591 | case elfcpp::R_POWERPC_GOT_TPREL16_LO: | |
7592 | case elfcpp::R_POWERPC_GOT_DTPREL16_LO: | |
7593 | case elfcpp::R_POWERPC_GOT16_LO: | |
7594 | case elfcpp::R_PPC64_GOT16_LO_DS: | |
7595 | case elfcpp::R_PPC64_TOC16_LO: | |
7596 | case elfcpp::R_PPC64_TOC16_LO_DS: | |
7597 | insn_check = check_lo; | |
7598 | break; | |
7599 | } | |
7600 | ||
7601 | section_size_type slen; | |
7602 | const unsigned char* view = NULL; | |
7603 | if (insn_check != no_check) | |
7604 | { | |
7605 | view = ppc_object->section_contents(data_shndx, &slen, false); | |
7606 | section_size_type off = | |
7607 | convert_to_section_size_type(reloc.get_r_offset()) & -4; | |
7608 | if (off < slen) | |
7609 | { | |
7610 | uint32_t insn = elfcpp::Swap<32, big_endian>::readval(view + off); | |
7611 | if (insn_check == check_lo | |
7612 | ? !ok_lo_toc_insn(insn, r_type) | |
7613 | : ((insn & ((0x3f << 26) | 0x1f << 16)) | |
7614 | != ((15u << 26) | (2 << 16)) /* addis rt,2,imm */)) | |
7615 | { | |
7616 | ppc_object->set_no_toc_opt(); | |
7617 | gold_warning(_("%s: toc optimization is not supported " | |
7618 | "for %#08x instruction"), | |
7619 | ppc_object->name().c_str(), insn); | |
7620 | } | |
7621 | } | |
7622 | } | |
7623 | ||
7624 | switch (r_type) | |
7625 | { | |
7626 | default: | |
7627 | break; | |
7628 | case elfcpp::R_PPC64_TOC16: | |
7629 | case elfcpp::R_PPC64_TOC16_LO: | |
7630 | case elfcpp::R_PPC64_TOC16_HI: | |
7631 | case elfcpp::R_PPC64_TOC16_HA: | |
7632 | case elfcpp::R_PPC64_TOC16_DS: | |
7633 | case elfcpp::R_PPC64_TOC16_LO_DS: | |
7634 | if (gsym->source() == Symbol::FROM_OBJECT | |
7635 | && !gsym->object()->is_dynamic()) | |
7636 | { | |
7637 | Powerpc_relobj<size, big_endian>* sym_object | |
7638 | = static_cast<Powerpc_relobj<size, big_endian>*>(gsym->object()); | |
7639 | bool is_ordinary; | |
7640 | unsigned int shndx = gsym->shndx(&is_ordinary); | |
7641 | if (shndx == sym_object->toc_shndx()) | |
7642 | { | |
7643 | Sized_symbol<size>* sym = symtab->get_sized_symbol<size>(gsym); | |
412294da | 7644 | Address dst_off = sym->value() + reloc.get_r_addend(); |
5edad15d AM |
7645 | if (dst_off < sym_object->section_size(shndx)) |
7646 | { | |
7647 | bool ok = false; | |
7648 | if (r_type == elfcpp::R_PPC64_TOC16_HA) | |
7649 | ok = true; | |
7650 | else if (r_type == elfcpp::R_PPC64_TOC16_LO_DS) | |
7651 | { | |
7652 | // Need to check that the insn is a ld | |
7653 | if (!view) | |
7654 | view = ppc_object->section_contents(data_shndx, | |
7655 | &slen, | |
7656 | false); | |
7657 | section_size_type off = | |
7658 | (convert_to_section_size_type(reloc.get_r_offset()) | |
7659 | + (big_endian ? -2 : 3)); | |
7660 | if (off < slen | |
7661 | && (view[off] & (0x3f << 2)) == (58u << 2)) | |
7662 | ok = true; | |
7663 | } | |
7664 | if (!ok) | |
7665 | sym_object->set_no_toc_opt(dst_off); | |
7666 | } | |
7667 | } | |
7668 | } | |
7669 | break; | |
7670 | } | |
7671 | } | |
7672 | ||
f159cdb6 AM |
7673 | if (size == 32) |
7674 | { | |
7675 | switch (r_type) | |
7676 | { | |
7677 | case elfcpp::R_PPC_LOCAL24PC: | |
7678 | if (strcmp(gsym->name(), "_GLOBAL_OFFSET_TABLE_") == 0) | |
7679 | gold_error(_("%s: unsupported -mbss-plt code"), | |
7680 | ppc_object->name().c_str()); | |
7681 | break; | |
7682 | default: | |
7683 | break; | |
7684 | } | |
7685 | } | |
7686 | ||
d8f5a274 AM |
7687 | switch (r_type) |
7688 | { | |
7689 | case elfcpp::R_POWERPC_GOT_TLSLD16: | |
7690 | case elfcpp::R_POWERPC_GOT_TLSGD16: | |
7691 | case elfcpp::R_POWERPC_GOT_TPREL16: | |
7692 | case elfcpp::R_POWERPC_GOT_DTPREL16: | |
7693 | case elfcpp::R_POWERPC_GOT16: | |
7694 | case elfcpp::R_PPC64_GOT16_DS: | |
7695 | case elfcpp::R_PPC64_TOC16: | |
7696 | case elfcpp::R_PPC64_TOC16_DS: | |
7697 | ppc_object->set_has_small_toc_reloc(); | |
7698 | default: | |
7699 | break; | |
7700 | } | |
42cacb20 DE |
7701 | } |
7702 | ||
6d03d481 ST |
7703 | // Process relocations for gc. |
7704 | ||
7705 | template<int size, bool big_endian> | |
7706 | void | |
7707 | Target_powerpc<size, big_endian>::gc_process_relocs( | |
d83ce4e3 AM |
7708 | Symbol_table* symtab, |
7709 | Layout* layout, | |
7710 | Sized_relobj_file<size, big_endian>* object, | |
7711 | unsigned int data_shndx, | |
7712 | unsigned int, | |
7713 | const unsigned char* prelocs, | |
7714 | size_t reloc_count, | |
7715 | Output_section* output_section, | |
7716 | bool needs_special_offset_handling, | |
7717 | size_t local_symbol_count, | |
7718 | const unsigned char* plocal_symbols) | |
6d03d481 ST |
7719 | { |
7720 | typedef Target_powerpc<size, big_endian> Powerpc; | |
4d625b70 CC |
7721 | typedef gold::Default_classify_reloc<elfcpp::SHT_RELA, size, big_endian> |
7722 | Classify_reloc; | |
7723 | ||
e81fea4d AM |
7724 | Powerpc_relobj<size, big_endian>* ppc_object |
7725 | = static_cast<Powerpc_relobj<size, big_endian>*>(object); | |
7726 | if (size == 64) | |
7727 | ppc_object->set_opd_valid(); | |
7728 | if (size == 64 && data_shndx == ppc_object->opd_shndx()) | |
7729 | { | |
7730 | typename Powerpc_relobj<size, big_endian>::Access_from::iterator p; | |
7731 | for (p = ppc_object->access_from_map()->begin(); | |
7732 | p != ppc_object->access_from_map()->end(); | |
7733 | ++p) | |
7734 | { | |
7735 | Address dst_off = p->first; | |
7736 | unsigned int dst_indx = ppc_object->get_opd_ent(dst_off); | |
7737 | typename Powerpc_relobj<size, big_endian>::Section_refs::iterator s; | |
7738 | for (s = p->second.begin(); s != p->second.end(); ++s) | |
7739 | { | |
efc6fa12 | 7740 | Relobj* src_obj = s->first; |
e81fea4d AM |
7741 | unsigned int src_indx = s->second; |
7742 | symtab->gc()->add_reference(src_obj, src_indx, | |
7743 | ppc_object, dst_indx); | |
7744 | } | |
7745 | p->second.clear(); | |
7746 | } | |
7747 | ppc_object->access_from_map()->clear(); | |
c6de8ed4 | 7748 | ppc_object->process_gc_mark(symtab); |
e81fea4d AM |
7749 | // Don't look at .opd relocs as .opd will reference everything. |
7750 | return; | |
7751 | } | |
6d03d481 | 7752 | |
4d625b70 | 7753 | gold::gc_process_relocs<size, big_endian, Powerpc, Scan, Classify_reloc>( |
6d03d481 ST |
7754 | symtab, |
7755 | layout, | |
7756 | this, | |
7757 | object, | |
7758 | data_shndx, | |
7759 | prelocs, | |
7760 | reloc_count, | |
7761 | output_section, | |
7762 | needs_special_offset_handling, | |
7763 | local_symbol_count, | |
7764 | plocal_symbols); | |
7765 | } | |
7766 | ||
e81fea4d AM |
7767 | // Handle target specific gc actions when adding a gc reference from |
7768 | // SRC_OBJ, SRC_SHNDX to a location specified by DST_OBJ, DST_SHNDX | |
7769 | // and DST_OFF. For powerpc64, this adds a referenc to the code | |
7770 | // section of a function descriptor. | |
7771 | ||
7772 | template<int size, bool big_endian> | |
7773 | void | |
7774 | Target_powerpc<size, big_endian>::do_gc_add_reference( | |
7775 | Symbol_table* symtab, | |
efc6fa12 | 7776 | Relobj* src_obj, |
e81fea4d | 7777 | unsigned int src_shndx, |
efc6fa12 | 7778 | Relobj* dst_obj, |
e81fea4d AM |
7779 | unsigned int dst_shndx, |
7780 | Address dst_off) const | |
7781 | { | |
6c77229c AM |
7782 | if (size != 64 || dst_obj->is_dynamic()) |
7783 | return; | |
7784 | ||
e81fea4d AM |
7785 | Powerpc_relobj<size, big_endian>* ppc_object |
7786 | = static_cast<Powerpc_relobj<size, big_endian>*>(dst_obj); | |
a2d7bf59 | 7787 | if (dst_shndx != 0 && dst_shndx == ppc_object->opd_shndx()) |
e81fea4d AM |
7788 | { |
7789 | if (ppc_object->opd_valid()) | |
7790 | { | |
7791 | dst_shndx = ppc_object->get_opd_ent(dst_off); | |
7792 | symtab->gc()->add_reference(src_obj, src_shndx, dst_obj, dst_shndx); | |
7793 | } | |
7794 | else | |
7795 | { | |
7796 | // If we haven't run scan_opd_relocs, we must delay | |
7797 | // processing this function descriptor reference. | |
7798 | ppc_object->add_reference(src_obj, src_shndx, dst_off); | |
7799 | } | |
7800 | } | |
7801 | } | |
7802 | ||
7803 | // Add any special sections for this symbol to the gc work list. | |
7804 | // For powerpc64, this adds the code section of a function | |
7805 | // descriptor. | |
7806 | ||
7807 | template<int size, bool big_endian> | |
7808 | void | |
7809 | Target_powerpc<size, big_endian>::do_gc_mark_symbol( | |
7810 | Symbol_table* symtab, | |
7811 | Symbol* sym) const | |
7812 | { | |
7813 | if (size == 64) | |
7814 | { | |
7815 | Powerpc_relobj<size, big_endian>* ppc_object | |
7816 | = static_cast<Powerpc_relobj<size, big_endian>*>(sym->object()); | |
7817 | bool is_ordinary; | |
7818 | unsigned int shndx = sym->shndx(&is_ordinary); | |
a2d7bf59 | 7819 | if (is_ordinary && shndx != 0 && shndx == ppc_object->opd_shndx()) |
e81fea4d AM |
7820 | { |
7821 | Sized_symbol<size>* gsym = symtab->get_sized_symbol<size>(sym); | |
7822 | Address dst_off = gsym->value(); | |
c6de8ed4 AM |
7823 | if (ppc_object->opd_valid()) |
7824 | { | |
7825 | unsigned int dst_indx = ppc_object->get_opd_ent(dst_off); | |
4277535c RÁE |
7826 | symtab->gc()->worklist().push_back(Section_id(ppc_object, |
7827 | dst_indx)); | |
c6de8ed4 AM |
7828 | } |
7829 | else | |
7830 | ppc_object->add_gc_mark(dst_off); | |
e81fea4d AM |
7831 | } |
7832 | } | |
7833 | } | |
7834 | ||
dc3714f3 AM |
7835 | // For a symbol location in .opd, set LOC to the location of the |
7836 | // function entry. | |
7837 | ||
7838 | template<int size, bool big_endian> | |
7839 | void | |
7840 | Target_powerpc<size, big_endian>::do_function_location( | |
7841 | Symbol_location* loc) const | |
7842 | { | |
a2d7bf59 | 7843 | if (size == 64 && loc->shndx != 0) |
dc3714f3 AM |
7844 | { |
7845 | if (loc->object->is_dynamic()) | |
7846 | { | |
7847 | Powerpc_dynobj<size, big_endian>* ppc_object | |
7848 | = static_cast<Powerpc_dynobj<size, big_endian>*>(loc->object); | |
7849 | if (loc->shndx == ppc_object->opd_shndx()) | |
7850 | { | |
7851 | Address dest_off; | |
7852 | Address off = loc->offset - ppc_object->opd_address(); | |
7853 | loc->shndx = ppc_object->get_opd_ent(off, &dest_off); | |
7854 | loc->offset = dest_off; | |
7855 | } | |
7856 | } | |
7857 | else | |
7858 | { | |
7859 | const Powerpc_relobj<size, big_endian>* ppc_object | |
7860 | = static_cast<const Powerpc_relobj<size, big_endian>*>(loc->object); | |
7861 | if (loc->shndx == ppc_object->opd_shndx()) | |
7862 | { | |
7863 | Address dest_off; | |
7864 | loc->shndx = ppc_object->get_opd_ent(loc->offset, &dest_off); | |
7865 | loc->offset = dest_off; | |
7866 | } | |
7867 | } | |
7868 | } | |
7869 | } | |
7870 | ||
bbec1a5d AM |
7871 | // FNOFFSET in section SHNDX in OBJECT is the start of a function |
7872 | // compiled with -fsplit-stack. The function calls non-split-stack | |
7873 | // code. Change the function to ensure it has enough stack space to | |
7874 | // call some random function. | |
7875 | ||
7876 | template<int size, bool big_endian> | |
7877 | void | |
7878 | Target_powerpc<size, big_endian>::do_calls_non_split( | |
7879 | Relobj* object, | |
7880 | unsigned int shndx, | |
7881 | section_offset_type fnoffset, | |
7882 | section_size_type fnsize, | |
6e0813d3 CC |
7883 | const unsigned char* prelocs, |
7884 | size_t reloc_count, | |
bbec1a5d AM |
7885 | unsigned char* view, |
7886 | section_size_type view_size, | |
7887 | std::string* from, | |
7888 | std::string* to) const | |
7889 | { | |
7890 | // 32-bit not supported. | |
7891 | if (size == 32) | |
7892 | { | |
7893 | // warn | |
7894 | Target::do_calls_non_split(object, shndx, fnoffset, fnsize, | |
6e0813d3 CC |
7895 | prelocs, reloc_count, view, view_size, |
7896 | from, to); | |
bbec1a5d AM |
7897 | return; |
7898 | } | |
7899 | ||
7900 | // The function always starts with | |
7901 | // ld %r0,-0x7000-64(%r13) # tcbhead_t.__private_ss | |
7902 | // addis %r12,%r1,-allocate@ha | |
7903 | // addi %r12,%r12,-allocate@l | |
7904 | // cmpld %r12,%r0 | |
7905 | // but note that the addis or addi may be replaced with a nop | |
7906 | ||
7907 | unsigned char *entry = view + fnoffset; | |
7908 | uint32_t insn = elfcpp::Swap<32, big_endian>::readval(entry); | |
7909 | ||
7910 | if ((insn & 0xffff0000) == addis_2_12) | |
7911 | { | |
7912 | /* Skip ELFv2 global entry code. */ | |
7913 | entry += 8; | |
7914 | insn = elfcpp::Swap<32, big_endian>::readval(entry); | |
7915 | } | |
7916 | ||
7917 | unsigned char *pinsn = entry; | |
7918 | bool ok = false; | |
7919 | const uint32_t ld_private_ss = 0xe80d8fc0; | |
7920 | if (insn == ld_private_ss) | |
7921 | { | |
7922 | int32_t allocate = 0; | |
7923 | while (1) | |
7924 | { | |
7925 | pinsn += 4; | |
7926 | insn = elfcpp::Swap<32, big_endian>::readval(pinsn); | |
7927 | if ((insn & 0xffff0000) == addis_12_1) | |
7928 | allocate += (insn & 0xffff) << 16; | |
7929 | else if ((insn & 0xffff0000) == addi_12_1 | |
7930 | || (insn & 0xffff0000) == addi_12_12) | |
7931 | allocate += ((insn & 0xffff) ^ 0x8000) - 0x8000; | |
7932 | else if (insn != nop) | |
7933 | break; | |
7934 | } | |
7935 | if (insn == cmpld_7_12_0 && pinsn == entry + 12) | |
7936 | { | |
7937 | int extra = parameters->options().split_stack_adjust_size(); | |
7938 | allocate -= extra; | |
7939 | if (allocate >= 0 || extra < 0) | |
7940 | { | |
7941 | object->error(_("split-stack stack size overflow at " | |
7942 | "section %u offset %0zx"), | |
7943 | shndx, static_cast<size_t>(fnoffset)); | |
7944 | return; | |
7945 | } | |
7946 | pinsn = entry + 4; | |
7947 | insn = addis_12_1 | (((allocate + 0x8000) >> 16) & 0xffff); | |
7948 | if (insn != addis_12_1) | |
7949 | { | |
7950 | elfcpp::Swap<32, big_endian>::writeval(pinsn, insn); | |
7951 | pinsn += 4; | |
7952 | insn = addi_12_12 | (allocate & 0xffff); | |
7953 | if (insn != addi_12_12) | |
7954 | { | |
7955 | elfcpp::Swap<32, big_endian>::writeval(pinsn, insn); | |
7956 | pinsn += 4; | |
7957 | } | |
7958 | } | |
7959 | else | |
7960 | { | |
7961 | insn = addi_12_1 | (allocate & 0xffff); | |
7962 | elfcpp::Swap<32, big_endian>::writeval(pinsn, insn); | |
7963 | pinsn += 4; | |
7964 | } | |
7965 | if (pinsn != entry + 12) | |
7966 | elfcpp::Swap<32, big_endian>::writeval(pinsn, nop); | |
7967 | ||
7968 | ok = true; | |
7969 | } | |
7970 | } | |
7971 | ||
7972 | if (!ok) | |
7973 | { | |
7974 | if (!object->has_no_split_stack()) | |
7975 | object->error(_("failed to match split-stack sequence at " | |
7976 | "section %u offset %0zx"), | |
7977 | shndx, static_cast<size_t>(fnoffset)); | |
7978 | } | |
7979 | } | |
7980 | ||
42cacb20 DE |
7981 | // Scan relocations for a section. |
7982 | ||
7983 | template<int size, bool big_endian> | |
7984 | void | |
7985 | Target_powerpc<size, big_endian>::scan_relocs( | |
d83ce4e3 AM |
7986 | Symbol_table* symtab, |
7987 | Layout* layout, | |
7988 | Sized_relobj_file<size, big_endian>* object, | |
7989 | unsigned int data_shndx, | |
7990 | unsigned int sh_type, | |
7991 | const unsigned char* prelocs, | |
7992 | size_t reloc_count, | |
7993 | Output_section* output_section, | |
7994 | bool needs_special_offset_handling, | |
7995 | size_t local_symbol_count, | |
7996 | const unsigned char* plocal_symbols) | |
42cacb20 DE |
7997 | { |
7998 | typedef Target_powerpc<size, big_endian> Powerpc; | |
4d625b70 CC |
7999 | typedef gold::Default_classify_reloc<elfcpp::SHT_RELA, size, big_endian> |
8000 | Classify_reloc; | |
42cacb20 | 8001 | |
7ee7ff70 AM |
8002 | if (!this->plt_localentry0_init_) |
8003 | { | |
8004 | bool plt_localentry0 = false; | |
8005 | if (size == 64 | |
8006 | && this->abiversion() >= 2) | |
8007 | { | |
8008 | if (parameters->options().user_set_plt_localentry()) | |
8009 | plt_localentry0 = parameters->options().plt_localentry(); | |
d44c746a AM |
8010 | if (plt_localentry0 |
8011 | && symtab->lookup("GLIBC_2.26", NULL) == NULL) | |
8012 | gold_warning(_("--plt-localentry is especially dangerous without " | |
8013 | "ld.so support to detect ABI violations")); | |
7ee7ff70 AM |
8014 | } |
8015 | this->plt_localentry0_ = plt_localentry0; | |
8016 | this->plt_localentry0_init_ = true; | |
8017 | } | |
8018 | ||
42cacb20 DE |
8019 | if (sh_type == elfcpp::SHT_REL) |
8020 | { | |
8021 | gold_error(_("%s: unsupported REL reloc section"), | |
8022 | object->name().c_str()); | |
8023 | return; | |
8024 | } | |
8025 | ||
4d625b70 | 8026 | gold::scan_relocs<size, big_endian, Powerpc, Scan, Classify_reloc>( |
42cacb20 DE |
8027 | symtab, |
8028 | layout, | |
8029 | this, | |
8030 | object, | |
8031 | data_shndx, | |
8032 | prelocs, | |
8033 | reloc_count, | |
8034 | output_section, | |
8035 | needs_special_offset_handling, | |
8036 | local_symbol_count, | |
8037 | plocal_symbols); | |
8038 | } | |
8039 | ||
ec4dbad3 AM |
8040 | // Functor class for processing the global symbol table. |
8041 | // Removes symbols defined on discarded opd entries. | |
8042 | ||
8043 | template<bool big_endian> | |
8044 | class Global_symbol_visitor_opd | |
8045 | { | |
8046 | public: | |
8047 | Global_symbol_visitor_opd() | |
8048 | { } | |
8049 | ||
8050 | void | |
8051 | operator()(Sized_symbol<64>* sym) | |
8052 | { | |
8053 | if (sym->has_symtab_index() | |
8054 | || sym->source() != Symbol::FROM_OBJECT | |
8055 | || !sym->in_real_elf()) | |
8056 | return; | |
8057 | ||
6c77229c AM |
8058 | if (sym->object()->is_dynamic()) |
8059 | return; | |
8060 | ||
ec4dbad3 AM |
8061 | Powerpc_relobj<64, big_endian>* symobj |
8062 | = static_cast<Powerpc_relobj<64, big_endian>*>(sym->object()); | |
6c77229c | 8063 | if (symobj->opd_shndx() == 0) |
ec4dbad3 AM |
8064 | return; |
8065 | ||
8066 | bool is_ordinary; | |
8067 | unsigned int shndx = sym->shndx(&is_ordinary); | |
8068 | if (shndx == symobj->opd_shndx() | |
8069 | && symobj->get_opd_discard(sym->value())) | |
1611bc4a AM |
8070 | { |
8071 | sym->set_undefined(); | |
e3ee8ed4 | 8072 | sym->set_visibility(elfcpp::STV_DEFAULT); |
1611bc4a AM |
8073 | sym->set_is_defined_in_discarded_section(); |
8074 | sym->set_symtab_index(-1U); | |
8075 | } | |
ec4dbad3 AM |
8076 | } |
8077 | }; | |
8078 | ||
f3a0ed29 AM |
8079 | template<int size, bool big_endian> |
8080 | void | |
8081 | Target_powerpc<size, big_endian>::define_save_restore_funcs( | |
8082 | Layout* layout, | |
8083 | Symbol_table* symtab) | |
8084 | { | |
8085 | if (size == 64) | |
8086 | { | |
d49044c7 AM |
8087 | Output_data_save_res<size, big_endian>* savres |
8088 | = new Output_data_save_res<size, big_endian>(symtab); | |
8089 | this->savres_section_ = savres; | |
f3a0ed29 AM |
8090 | layout->add_output_section_data(".text", elfcpp::SHT_PROGBITS, |
8091 | elfcpp::SHF_ALLOC | elfcpp::SHF_EXECINSTR, | |
8092 | savres, ORDER_TEXT, false); | |
8093 | } | |
8094 | } | |
8095 | ||
d8f5a274 AM |
8096 | // Sort linker created .got section first (for the header), then input |
8097 | // sections belonging to files using small model code. | |
8098 | ||
8099 | template<bool big_endian> | |
8100 | class Sort_toc_sections | |
8101 | { | |
8102 | public: | |
8103 | bool | |
8104 | operator()(const Output_section::Input_section& is1, | |
8105 | const Output_section::Input_section& is2) const | |
8106 | { | |
8107 | if (!is1.is_input_section() && is2.is_input_section()) | |
8108 | return true; | |
8109 | bool small1 | |
8110 | = (is1.is_input_section() | |
8111 | && (static_cast<const Powerpc_relobj<64, big_endian>*>(is1.relobj()) | |
8112 | ->has_small_toc_reloc())); | |
8113 | bool small2 | |
8114 | = (is2.is_input_section() | |
8115 | && (static_cast<const Powerpc_relobj<64, big_endian>*>(is2.relobj()) | |
8116 | ->has_small_toc_reloc())); | |
8117 | return small1 && !small2; | |
8118 | } | |
8119 | }; | |
8120 | ||
42cacb20 DE |
8121 | // Finalize the sections. |
8122 | ||
8123 | template<int size, bool big_endian> | |
8124 | void | |
d5b40221 DK |
8125 | Target_powerpc<size, big_endian>::do_finalize_sections( |
8126 | Layout* layout, | |
f59f41f3 | 8127 | const Input_objects*, |
ec4dbad3 | 8128 | Symbol_table* symtab) |
42cacb20 | 8129 | { |
c9824451 AM |
8130 | if (parameters->doing_static_link()) |
8131 | { | |
8132 | // At least some versions of glibc elf-init.o have a strong | |
8133 | // reference to __rela_iplt marker syms. A weak ref would be | |
8134 | // better.. | |
8135 | if (this->iplt_ != NULL) | |
8136 | { | |
8137 | Reloc_section* rel = this->iplt_->rel_plt(); | |
8138 | symtab->define_in_output_data("__rela_iplt_start", NULL, | |
8139 | Symbol_table::PREDEFINED, rel, 0, 0, | |
8140 | elfcpp::STT_NOTYPE, elfcpp::STB_GLOBAL, | |
8141 | elfcpp::STV_HIDDEN, 0, false, true); | |
8142 | symtab->define_in_output_data("__rela_iplt_end", NULL, | |
8143 | Symbol_table::PREDEFINED, rel, 0, 0, | |
8144 | elfcpp::STT_NOTYPE, elfcpp::STB_GLOBAL, | |
8145 | elfcpp::STV_HIDDEN, 0, true, true); | |
8146 | } | |
8147 | else | |
8148 | { | |
8149 | symtab->define_as_constant("__rela_iplt_start", NULL, | |
8150 | Symbol_table::PREDEFINED, 0, 0, | |
8151 | elfcpp::STT_NOTYPE, elfcpp::STB_GLOBAL, | |
8152 | elfcpp::STV_HIDDEN, 0, true, false); | |
8153 | symtab->define_as_constant("__rela_iplt_end", NULL, | |
8154 | Symbol_table::PREDEFINED, 0, 0, | |
8155 | elfcpp::STT_NOTYPE, elfcpp::STB_GLOBAL, | |
8156 | elfcpp::STV_HIDDEN, 0, true, false); | |
8157 | } | |
8158 | } | |
8159 | ||
ec4dbad3 AM |
8160 | if (size == 64) |
8161 | { | |
8162 | typedef Global_symbol_visitor_opd<big_endian> Symbol_visitor; | |
8163 | symtab->for_all_symbols<64, Symbol_visitor>(Symbol_visitor()); | |
ec661b9d AM |
8164 | |
8165 | if (!parameters->options().relocatable()) | |
8166 | { | |
8167 | this->define_save_restore_funcs(layout, symtab); | |
8168 | ||
8169 | // Annoyingly, we need to make these sections now whether or | |
8170 | // not we need them. If we delay until do_relax then we | |
8171 | // need to mess with the relaxation machinery checkpointing. | |
8172 | this->got_section(symtab, layout); | |
8173 | this->make_brlt_section(layout); | |
d8f5a274 AM |
8174 | |
8175 | if (parameters->options().toc_sort()) | |
8176 | { | |
8177 | Output_section* os = this->got_->output_section(); | |
8178 | if (os != NULL && os->input_sections().size() > 1) | |
8179 | std::stable_sort(os->input_sections().begin(), | |
8180 | os->input_sections().end(), | |
8181 | Sort_toc_sections<big_endian>()); | |
8182 | } | |
ec661b9d | 8183 | } |
ec4dbad3 AM |
8184 | } |
8185 | ||
42cacb20 | 8186 | // Fill in some more dynamic tags. |
c9269dff | 8187 | Output_data_dynamic* odyn = layout->dynamic_data(); |
c9824451 | 8188 | if (odyn != NULL) |
cf43a2fe | 8189 | { |
c9824451 AM |
8190 | const Reloc_section* rel_plt = (this->plt_ == NULL |
8191 | ? NULL | |
8192 | : this->plt_->rel_plt()); | |
8193 | layout->add_target_dynamic_tags(false, this->plt_, rel_plt, | |
8194 | this->rela_dyn_, true, size == 32); | |
8195 | ||
8196 | if (size == 32) | |
dd93cd0a | 8197 | { |
c9824451 AM |
8198 | if (this->got_ != NULL) |
8199 | { | |
8200 | this->got_->finalize_data_size(); | |
8201 | odyn->add_section_plus_offset(elfcpp::DT_PPC_GOT, | |
8202 | this->got_, this->got_->g_o_t()); | |
8203 | } | |
34e0882b AM |
8204 | if (this->has_tls_get_addr_opt_) |
8205 | odyn->add_constant(elfcpp::DT_PPC_OPT, elfcpp::PPC_OPT_TLS); | |
dd93cd0a | 8206 | } |
c9824451 | 8207 | else |
dd93cd0a | 8208 | { |
c9824451 AM |
8209 | if (this->glink_ != NULL) |
8210 | { | |
8211 | this->glink_->finalize_data_size(); | |
8212 | odyn->add_section_plus_offset(elfcpp::DT_PPC64_GLINK, | |
8213 | this->glink_, | |
9e390558 | 8214 | (this->glink_->pltresolve_size() |
c9824451 AM |
8215 | - 32)); |
8216 | } | |
34e0882b | 8217 | if (this->has_localentry0_ || this->has_tls_get_addr_opt_) |
7ee7ff70 | 8218 | odyn->add_constant(elfcpp::DT_PPC64_OPT, |
34e0882b AM |
8219 | ((this->has_localentry0_ |
8220 | ? elfcpp::PPC64_OPT_LOCALENTRY : 0) | |
8221 | | (this->has_tls_get_addr_opt_ | |
8222 | ? elfcpp::PPC64_OPT_TLS : 0))); | |
dd93cd0a | 8223 | } |
c9269dff | 8224 | } |
cf43a2fe | 8225 | |
42cacb20 DE |
8226 | // Emit any relocs we saved in an attempt to avoid generating COPY |
8227 | // relocs. | |
8228 | if (this->copy_relocs_.any_saved_relocs()) | |
8229 | this->copy_relocs_.emit(this->rela_dyn_section(layout)); | |
8230 | } | |
8231 | ||
5edad15d AM |
8232 | // Emit any saved relocs, and mark toc entries using any of these |
8233 | // relocs as not optimizable. | |
aba6bc71 | 8234 | |
5edad15d AM |
8235 | template<int sh_type, int size, bool big_endian> |
8236 | void | |
8237 | Powerpc_copy_relocs<sh_type, size, big_endian>::emit( | |
8238 | Output_data_reloc<sh_type, true, size, big_endian>* reloc_section) | |
aba6bc71 | 8239 | { |
5edad15d AM |
8240 | if (size == 64 |
8241 | && parameters->options().toc_optimize()) | |
8242 | { | |
8243 | for (typename Copy_relocs<sh_type, size, big_endian>:: | |
8244 | Copy_reloc_entries::iterator p = this->entries_.begin(); | |
8245 | p != this->entries_.end(); | |
8246 | ++p) | |
8247 | { | |
8248 | typename Copy_relocs<sh_type, size, big_endian>::Copy_reloc_entry& | |
8249 | entry = *p; | |
8250 | ||
8251 | // If the symbol is no longer defined in a dynamic object, | |
8252 | // then we emitted a COPY relocation. If it is still | |
8253 | // dynamic then we'll need dynamic relocations and thus | |
8254 | // can't optimize toc entries. | |
8255 | if (entry.sym_->is_from_dynobj()) | |
8256 | { | |
8257 | Powerpc_relobj<size, big_endian>* ppc_object | |
8258 | = static_cast<Powerpc_relobj<size, big_endian>*>(entry.relobj_); | |
8259 | if (entry.shndx_ == ppc_object->toc_shndx()) | |
8260 | ppc_object->set_no_toc_opt(entry.address_); | |
8261 | } | |
8262 | } | |
8263 | } | |
8264 | ||
8265 | Copy_relocs<sh_type, size, big_endian>::emit(reloc_section); | |
aba6bc71 AM |
8266 | } |
8267 | ||
3ea0a085 AM |
8268 | // Return the value to use for a branch relocation. |
8269 | ||
8270 | template<int size, bool big_endian> | |
1611bc4a | 8271 | bool |
3ea0a085 | 8272 | Target_powerpc<size, big_endian>::symval_for_branch( |
6c77229c | 8273 | const Symbol_table* symtab, |
3ea0a085 AM |
8274 | const Sized_symbol<size>* gsym, |
8275 | Powerpc_relobj<size, big_endian>* object, | |
1611bc4a | 8276 | Address *value, |
3ea0a085 AM |
8277 | unsigned int *dest_shndx) |
8278 | { | |
9055360d AM |
8279 | if (size == 32 || this->abiversion() >= 2) |
8280 | gold_unreachable(); | |
3ea0a085 | 8281 | *dest_shndx = 0; |
3ea0a085 AM |
8282 | |
8283 | // If the symbol is defined in an opd section, ie. is a function | |
8284 | // descriptor, use the function descriptor code entry address | |
8285 | Powerpc_relobj<size, big_endian>* symobj = object; | |
f3a0ed29 | 8286 | if (gsym != NULL |
0e123f69 AM |
8287 | && (gsym->source() != Symbol::FROM_OBJECT |
8288 | || gsym->object()->is_dynamic())) | |
1611bc4a | 8289 | return true; |
3ea0a085 AM |
8290 | if (gsym != NULL) |
8291 | symobj = static_cast<Powerpc_relobj<size, big_endian>*>(gsym->object()); | |
8292 | unsigned int shndx = symobj->opd_shndx(); | |
8293 | if (shndx == 0) | |
1611bc4a | 8294 | return true; |
3ea0a085 | 8295 | Address opd_addr = symobj->get_output_section_offset(shndx); |
a2d7bf59 | 8296 | if (opd_addr == invalid_address) |
1611bc4a | 8297 | return true; |
c6905c28 | 8298 | opd_addr += symobj->output_section_address(shndx); |
1611bc4a | 8299 | if (*value >= opd_addr && *value < opd_addr + symobj->section_size(shndx)) |
3ea0a085 AM |
8300 | { |
8301 | Address sec_off; | |
1611bc4a | 8302 | *dest_shndx = symobj->get_opd_ent(*value - opd_addr, &sec_off); |
6c77229c AM |
8303 | if (symtab->is_section_folded(symobj, *dest_shndx)) |
8304 | { | |
8305 | Section_id folded | |
8306 | = symtab->icf()->get_folded_section(symobj, *dest_shndx); | |
8307 | symobj = static_cast<Powerpc_relobj<size, big_endian>*>(folded.first); | |
8308 | *dest_shndx = folded.second; | |
8309 | } | |
3ea0a085 | 8310 | Address sec_addr = symobj->get_output_section_offset(*dest_shndx); |
1611bc4a AM |
8311 | if (sec_addr == invalid_address) |
8312 | return false; | |
8313 | ||
3ea0a085 | 8314 | sec_addr += symobj->output_section(*dest_shndx)->address(); |
1611bc4a | 8315 | *value = sec_addr + sec_off; |
3ea0a085 | 8316 | } |
1611bc4a | 8317 | return true; |
3ea0a085 AM |
8318 | } |
8319 | ||
42cacb20 DE |
8320 | // Perform a relocation. |
8321 | ||
8322 | template<int size, bool big_endian> | |
8323 | inline bool | |
8324 | Target_powerpc<size, big_endian>::Relocate::relocate( | |
d83ce4e3 | 8325 | const Relocate_info<size, big_endian>* relinfo, |
91a65d2f | 8326 | unsigned int, |
d83ce4e3 AM |
8327 | Target_powerpc* target, |
8328 | Output_section* os, | |
8329 | size_t relnum, | |
91a65d2f | 8330 | const unsigned char* preloc, |
d83ce4e3 AM |
8331 | const Sized_symbol<size>* gsym, |
8332 | const Symbol_value<size>* psymval, | |
8333 | unsigned char* view, | |
c9269dff AM |
8334 | Address address, |
8335 | section_size_type view_size) | |
42cacb20 | 8336 | { |
0e804863 ILT |
8337 | if (view == NULL) |
8338 | return true; | |
8339 | ||
34e0882b AM |
8340 | if (target->replace_tls_get_addr(gsym)) |
8341 | gsym = static_cast<const Sized_symbol<size>*>(target->tls_get_addr_opt()); | |
8342 | ||
91a65d2f AM |
8343 | const elfcpp::Rela<size, big_endian> rela(preloc); |
8344 | unsigned int r_type = elfcpp::elf_r_type<size>(rela.get_r_info()); | |
34e0882b | 8345 | switch (this->maybe_skip_tls_get_addr_call(target, r_type, gsym)) |
dd93cd0a | 8346 | { |
e3deeb9c AM |
8347 | case Track_tls::NOT_EXPECTED: |
8348 | gold_error_at_location(relinfo, relnum, rela.get_r_offset(), | |
8349 | _("__tls_get_addr call lacks marker reloc")); | |
8350 | break; | |
8351 | case Track_tls::EXPECTED: | |
8352 | // We have already complained. | |
8353 | break; | |
8354 | case Track_tls::SKIP: | |
8355 | return true; | |
8356 | case Track_tls::NORMAL: | |
8357 | break; | |
dd93cd0a | 8358 | } |
dd93cd0a | 8359 | |
42cacb20 | 8360 | typedef Powerpc_relocate_functions<size, big_endian> Reloc; |
dd93cd0a | 8361 | typedef typename elfcpp::Swap<32, big_endian>::Valtype Insn; |
0e123f69 | 8362 | typedef typename elfcpp::Rela<size, big_endian> Reltype; |
dcfc7dd4 AM |
8363 | // Offset from start of insn to d-field reloc. |
8364 | const int d_offset = big_endian ? 2 : 0; | |
8365 | ||
3ea0a085 AM |
8366 | Powerpc_relobj<size, big_endian>* const object |
8367 | = static_cast<Powerpc_relobj<size, big_endian>*>(relinfo->object); | |
dd93cd0a | 8368 | Address value = 0; |
0cfb0717 | 8369 | bool has_stub_value = false; |
7ee7ff70 | 8370 | bool localentry0 = false; |
e5d5f5ed | 8371 | unsigned int r_sym = elfcpp::elf_r_sym<size>(rela.get_r_info()); |
b3ccdeb5 | 8372 | if ((gsym != NULL |
88b8e639 | 8373 | ? gsym->use_plt_offset(Scan::get_reference_flags(r_type, target)) |
b3ccdeb5 AM |
8374 | : object->local_has_plt_offset(r_sym)) |
8375 | && (!psymval->is_ifunc_symbol() | |
9055360d | 8376 | || Scan::reloc_needs_plt_for_ifunc(target, object, r_type, false))) |
dd93cd0a | 8377 | { |
9055360d AM |
8378 | if (size == 64 |
8379 | && gsym != NULL | |
8380 | && target->abiversion() >= 2 | |
8381 | && !parameters->options().output_is_position_independent() | |
8382 | && !is_branch_reloc(r_type)) | |
ec661b9d | 8383 | { |
faa2211d AM |
8384 | Address off = target->glink_section()->find_global_entry(gsym); |
8385 | if (off != invalid_address) | |
6ec65f28 AM |
8386 | { |
8387 | value = target->glink_section()->global_entry_address() + off; | |
8388 | has_stub_value = true; | |
8389 | } | |
ec661b9d | 8390 | } |
c9824451 | 8391 | else |
9055360d | 8392 | { |
64b5d6d7 AM |
8393 | Stub_table<size, big_endian>* stub_table = NULL; |
8394 | if (target->stub_tables().size() == 1) | |
8395 | stub_table = target->stub_tables()[0]; | |
8396 | if (stub_table == NULL | |
8397 | && !(size == 32 | |
8398 | && gsym != NULL | |
8399 | && !parameters->options().output_is_position_independent() | |
8400 | && !is_branch_reloc(r_type))) | |
8401 | stub_table = object->stub_table(relinfo->data_shndx); | |
9055360d AM |
8402 | if (stub_table == NULL) |
8403 | { | |
64b5d6d7 AM |
8404 | // This is a ref from a data section to an ifunc symbol, |
8405 | // or a non-branch reloc for which we always want to use | |
8406 | // one set of stubs for resolving function addresses. | |
9055360d AM |
8407 | if (target->stub_tables().size() != 0) |
8408 | stub_table = target->stub_tables()[0]; | |
8409 | } | |
faa2211d AM |
8410 | if (stub_table != NULL) |
8411 | { | |
7e57d19e | 8412 | const typename Stub_table<size, big_endian>::Plt_stub_ent* ent; |
faa2211d | 8413 | if (gsym != NULL) |
7e57d19e | 8414 | ent = stub_table->find_plt_call_entry(object, gsym, r_type, |
faa2211d AM |
8415 | rela.get_r_addend()); |
8416 | else | |
7e57d19e | 8417 | ent = stub_table->find_plt_call_entry(object, r_sym, r_type, |
faa2211d | 8418 | rela.get_r_addend()); |
7e57d19e | 8419 | if (ent != NULL) |
faa2211d | 8420 | { |
7e57d19e AM |
8421 | value = stub_table->stub_address() + ent->off_; |
8422 | const int reloc_size = elfcpp::Elf_sizes<size>::rela_size; | |
8423 | elfcpp::Shdr<size, big_endian> shdr(relinfo->reloc_shdr); | |
8424 | size_t reloc_count = shdr.get_sh_size() / reloc_size; | |
8425 | if (size == 64 | |
8426 | && ent->r2save_ | |
8427 | && relnum + 1 < reloc_count) | |
8428 | { | |
8429 | Reltype next_rela(preloc + reloc_size); | |
8430 | if (elfcpp::elf_r_type<size>(next_rela.get_r_info()) | |
8431 | == elfcpp::R_PPC64_TOCSAVE | |
8432 | && next_rela.get_r_offset() == rela.get_r_offset() + 4) | |
8433 | value += 4; | |
8434 | } | |
7ee7ff70 | 8435 | localentry0 = ent->localentry0_; |
faa2211d AM |
8436 | has_stub_value = true; |
8437 | } | |
8438 | } | |
9055360d | 8439 | } |
faa2211d AM |
8440 | // We don't care too much about bogus debug references to |
8441 | // non-local functions, but otherwise there had better be a plt | |
8442 | // call stub or global entry stub as appropriate. | |
8443 | gold_assert(has_stub_value || !(os->flags() & elfcpp::SHF_ALLOC)); | |
dd93cd0a | 8444 | } |
cf43a2fe AM |
8445 | |
8446 | if (r_type == elfcpp::R_POWERPC_GOT16 | |
8447 | || r_type == elfcpp::R_POWERPC_GOT16_LO | |
8448 | || r_type == elfcpp::R_POWERPC_GOT16_HI | |
8449 | || r_type == elfcpp::R_POWERPC_GOT16_HA | |
8450 | || r_type == elfcpp::R_PPC64_GOT16_DS | |
8451 | || r_type == elfcpp::R_PPC64_GOT16_LO_DS) | |
42cacb20 | 8452 | { |
cf43a2fe AM |
8453 | if (gsym != NULL) |
8454 | { | |
8455 | gold_assert(gsym->has_got_offset(GOT_TYPE_STANDARD)); | |
8456 | value = gsym->got_offset(GOT_TYPE_STANDARD); | |
8457 | } | |
8458 | else | |
8459 | { | |
cf43a2fe AM |
8460 | gold_assert(object->local_has_got_offset(r_sym, GOT_TYPE_STANDARD)); |
8461 | value = object->local_got_offset(r_sym, GOT_TYPE_STANDARD); | |
8462 | } | |
dd93cd0a | 8463 | value -= target->got_section()->got_base_offset(object); |
cf43a2fe AM |
8464 | } |
8465 | else if (r_type == elfcpp::R_PPC64_TOC) | |
8466 | { | |
c9269dff | 8467 | value = (target->got_section()->output_section()->address() |
dd93cd0a | 8468 | + object->toc_base_offset()); |
cf43a2fe AM |
8469 | } |
8470 | else if (gsym != NULL | |
8471 | && (r_type == elfcpp::R_POWERPC_REL24 | |
8472 | || r_type == elfcpp::R_PPC_PLTREL24) | |
0cfb0717 | 8473 | && has_stub_value) |
cf43a2fe | 8474 | { |
c9269dff AM |
8475 | if (size == 64) |
8476 | { | |
8477 | typedef typename elfcpp::Swap<32, big_endian>::Valtype Valtype; | |
8478 | Valtype* wv = reinterpret_cast<Valtype*>(view); | |
34e0882b AM |
8479 | bool can_plt_call = localentry0 || target->is_tls_get_addr_opt(gsym); |
8480 | if (!can_plt_call && rela.get_r_offset() + 8 <= view_size) | |
c9269dff | 8481 | { |
3ea0a085 | 8482 | Valtype insn = elfcpp::Swap<32, big_endian>::readval(wv); |
c9269dff | 8483 | Valtype insn2 = elfcpp::Swap<32, big_endian>::readval(wv + 1); |
3ea0a085 AM |
8484 | if ((insn & 1) != 0 |
8485 | && (insn2 == nop | |
8486 | || insn2 == cror_15_15_15 || insn2 == cror_31_31_31)) | |
c9269dff | 8487 | { |
b4f7960d AM |
8488 | elfcpp::Swap<32, big_endian>:: |
8489 | writeval(wv + 1, ld_2_1 + target->stk_toc()); | |
c9269dff AM |
8490 | can_plt_call = true; |
8491 | } | |
8492 | } | |
8493 | if (!can_plt_call) | |
3ea0a085 AM |
8494 | { |
8495 | // If we don't have a branch and link followed by a nop, | |
8496 | // we can't go via the plt because there is no place to | |
8497 | // put a toc restoring instruction. | |
8498 | // Unless we know we won't be returning. | |
8499 | if (strcmp(gsym->name(), "__libc_start_main") == 0) | |
8500 | can_plt_call = true; | |
8501 | } | |
8502 | if (!can_plt_call) | |
8503 | { | |
ba8ca3e7 AM |
8504 | // g++ as of 20130507 emits self-calls without a |
8505 | // following nop. This is arguably wrong since we have | |
8506 | // conflicting information. On the one hand a global | |
8507 | // symbol and on the other a local call sequence, but | |
8508 | // don't error for this special case. | |
8509 | // It isn't possible to cheaply verify we have exactly | |
8510 | // such a call. Allow all calls to the same section. | |
3ea0a085 | 8511 | bool ok = false; |
c9824451 | 8512 | Address code = value; |
3ea0a085 AM |
8513 | if (gsym->source() == Symbol::FROM_OBJECT |
8514 | && gsym->object() == object) | |
8515 | { | |
9055360d AM |
8516 | unsigned int dest_shndx = 0; |
8517 | if (target->abiversion() < 2) | |
8518 | { | |
8519 | Address addend = rela.get_r_addend(); | |
1611bc4a AM |
8520 | code = psymval->value(object, addend); |
8521 | target->symval_for_branch(relinfo->symtab, gsym, object, | |
8522 | &code, &dest_shndx); | |
9055360d | 8523 | } |
3ea0a085 AM |
8524 | bool is_ordinary; |
8525 | if (dest_shndx == 0) | |
8526 | dest_shndx = gsym->shndx(&is_ordinary); | |
8527 | ok = dest_shndx == relinfo->data_shndx; | |
8528 | } | |
8529 | if (!ok) | |
c9824451 AM |
8530 | { |
8531 | gold_error_at_location(relinfo, relnum, rela.get_r_offset(), | |
8532 | _("call lacks nop, can't restore toc; " | |
8533 | "recompile with -fPIC")); | |
8534 | value = code; | |
8535 | } | |
3ea0a085 | 8536 | } |
c9269dff | 8537 | } |
cf43a2fe | 8538 | } |
dd93cd0a AM |
8539 | else if (r_type == elfcpp::R_POWERPC_GOT_TLSGD16 |
8540 | || r_type == elfcpp::R_POWERPC_GOT_TLSGD16_LO | |
8541 | || r_type == elfcpp::R_POWERPC_GOT_TLSGD16_HI | |
8542 | || r_type == elfcpp::R_POWERPC_GOT_TLSGD16_HA) | |
8543 | { | |
8544 | // First instruction of a global dynamic sequence, arg setup insn. | |
8545 | const bool final = gsym == NULL || gsym->final_value_is_known(); | |
8546 | const tls::Tls_optimization tls_type = target->optimize_tls_gd(final); | |
8547 | enum Got_type got_type = GOT_TYPE_STANDARD; | |
8548 | if (tls_type == tls::TLSOPT_NONE) | |
8549 | got_type = GOT_TYPE_TLSGD; | |
8550 | else if (tls_type == tls::TLSOPT_TO_IE) | |
8551 | got_type = GOT_TYPE_TPREL; | |
8552 | if (got_type != GOT_TYPE_STANDARD) | |
8553 | { | |
8554 | if (gsym != NULL) | |
8555 | { | |
8556 | gold_assert(gsym->has_got_offset(got_type)); | |
8557 | value = gsym->got_offset(got_type); | |
8558 | } | |
8559 | else | |
8560 | { | |
dd93cd0a AM |
8561 | gold_assert(object->local_has_got_offset(r_sym, got_type)); |
8562 | value = object->local_got_offset(r_sym, got_type); | |
8563 | } | |
8564 | value -= target->got_section()->got_base_offset(object); | |
8565 | } | |
8566 | if (tls_type == tls::TLSOPT_TO_IE) | |
8567 | { | |
8568 | if (r_type == elfcpp::R_POWERPC_GOT_TLSGD16 | |
8569 | || r_type == elfcpp::R_POWERPC_GOT_TLSGD16_LO) | |
8570 | { | |
dcfc7dd4 | 8571 | Insn* iview = reinterpret_cast<Insn*>(view - d_offset); |
dd93cd0a AM |
8572 | Insn insn = elfcpp::Swap<32, big_endian>::readval(iview); |
8573 | insn &= (1 << 26) - (1 << 16); // extract rt,ra from addi | |
8574 | if (size == 32) | |
8575 | insn |= 32 << 26; // lwz | |
8576 | else | |
8577 | insn |= 58 << 26; // ld | |
8578 | elfcpp::Swap<32, big_endian>::writeval(iview, insn); | |
8579 | } | |
8580 | r_type += (elfcpp::R_POWERPC_GOT_TPREL16 | |
8581 | - elfcpp::R_POWERPC_GOT_TLSGD16); | |
8582 | } | |
8583 | else if (tls_type == tls::TLSOPT_TO_LE) | |
8584 | { | |
8585 | if (r_type == elfcpp::R_POWERPC_GOT_TLSGD16 | |
8586 | || r_type == elfcpp::R_POWERPC_GOT_TLSGD16_LO) | |
8587 | { | |
dcfc7dd4 | 8588 | Insn* iview = reinterpret_cast<Insn*>(view - d_offset); |
0f81d3f0 AM |
8589 | Insn insn = elfcpp::Swap<32, big_endian>::readval(iview); |
8590 | insn &= (1 << 26) - (1 << 21); // extract rt | |
dd93cd0a | 8591 | if (size == 32) |
0f81d3f0 AM |
8592 | insn |= addis_0_2; |
8593 | else | |
8594 | insn |= addis_0_13; | |
dd93cd0a AM |
8595 | elfcpp::Swap<32, big_endian>::writeval(iview, insn); |
8596 | r_type = elfcpp::R_POWERPC_TPREL16_HA; | |
8597 | value = psymval->value(object, rela.get_r_addend()); | |
8598 | } | |
8599 | else | |
8600 | { | |
dcfc7dd4 | 8601 | Insn* iview = reinterpret_cast<Insn*>(view - d_offset); |
dd93cd0a AM |
8602 | Insn insn = nop; |
8603 | elfcpp::Swap<32, big_endian>::writeval(iview, insn); | |
8604 | r_type = elfcpp::R_POWERPC_NONE; | |
8605 | } | |
8606 | } | |
8607 | } | |
8608 | else if (r_type == elfcpp::R_POWERPC_GOT_TLSLD16 | |
8609 | || r_type == elfcpp::R_POWERPC_GOT_TLSLD16_LO | |
8610 | || r_type == elfcpp::R_POWERPC_GOT_TLSLD16_HI | |
8611 | || r_type == elfcpp::R_POWERPC_GOT_TLSLD16_HA) | |
8612 | { | |
8613 | // First instruction of a local dynamic sequence, arg setup insn. | |
8614 | const tls::Tls_optimization tls_type = target->optimize_tls_ld(); | |
8615 | if (tls_type == tls::TLSOPT_NONE) | |
8616 | { | |
8617 | value = target->tlsld_got_offset(); | |
8618 | value -= target->got_section()->got_base_offset(object); | |
8619 | } | |
8620 | else | |
8621 | { | |
8622 | gold_assert(tls_type == tls::TLSOPT_TO_LE); | |
8623 | if (r_type == elfcpp::R_POWERPC_GOT_TLSLD16 | |
8624 | || r_type == elfcpp::R_POWERPC_GOT_TLSLD16_LO) | |
8625 | { | |
dcfc7dd4 | 8626 | Insn* iview = reinterpret_cast<Insn*>(view - d_offset); |
0f81d3f0 AM |
8627 | Insn insn = elfcpp::Swap<32, big_endian>::readval(iview); |
8628 | insn &= (1 << 26) - (1 << 21); // extract rt | |
dd93cd0a | 8629 | if (size == 32) |
0f81d3f0 AM |
8630 | insn |= addis_0_2; |
8631 | else | |
8632 | insn |= addis_0_13; | |
dd93cd0a AM |
8633 | elfcpp::Swap<32, big_endian>::writeval(iview, insn); |
8634 | r_type = elfcpp::R_POWERPC_TPREL16_HA; | |
7404fe1b | 8635 | value = dtp_offset; |
dd93cd0a AM |
8636 | } |
8637 | else | |
8638 | { | |
dcfc7dd4 | 8639 | Insn* iview = reinterpret_cast<Insn*>(view - d_offset); |
dd93cd0a AM |
8640 | Insn insn = nop; |
8641 | elfcpp::Swap<32, big_endian>::writeval(iview, insn); | |
8642 | r_type = elfcpp::R_POWERPC_NONE; | |
8643 | } | |
8644 | } | |
8645 | } | |
8646 | else if (r_type == elfcpp::R_POWERPC_GOT_DTPREL16 | |
8647 | || r_type == elfcpp::R_POWERPC_GOT_DTPREL16_LO | |
8648 | || r_type == elfcpp::R_POWERPC_GOT_DTPREL16_HI | |
8649 | || r_type == elfcpp::R_POWERPC_GOT_DTPREL16_HA) | |
8650 | { | |
8651 | // Accesses relative to a local dynamic sequence address, | |
8652 | // no optimisation here. | |
8653 | if (gsym != NULL) | |
8654 | { | |
8655 | gold_assert(gsym->has_got_offset(GOT_TYPE_DTPREL)); | |
8656 | value = gsym->got_offset(GOT_TYPE_DTPREL); | |
8657 | } | |
8658 | else | |
8659 | { | |
dd93cd0a AM |
8660 | gold_assert(object->local_has_got_offset(r_sym, GOT_TYPE_DTPREL)); |
8661 | value = object->local_got_offset(r_sym, GOT_TYPE_DTPREL); | |
8662 | } | |
8663 | value -= target->got_section()->got_base_offset(object); | |
8664 | } | |
8665 | else if (r_type == elfcpp::R_POWERPC_GOT_TPREL16 | |
8666 | || r_type == elfcpp::R_POWERPC_GOT_TPREL16_LO | |
8667 | || r_type == elfcpp::R_POWERPC_GOT_TPREL16_HI | |
8668 | || r_type == elfcpp::R_POWERPC_GOT_TPREL16_HA) | |
8669 | { | |
8670 | // First instruction of initial exec sequence. | |
8671 | const bool final = gsym == NULL || gsym->final_value_is_known(); | |
8672 | const tls::Tls_optimization tls_type = target->optimize_tls_ie(final); | |
8673 | if (tls_type == tls::TLSOPT_NONE) | |
8674 | { | |
8675 | if (gsym != NULL) | |
8676 | { | |
8677 | gold_assert(gsym->has_got_offset(GOT_TYPE_TPREL)); | |
8678 | value = gsym->got_offset(GOT_TYPE_TPREL); | |
8679 | } | |
8680 | else | |
8681 | { | |
dd93cd0a AM |
8682 | gold_assert(object->local_has_got_offset(r_sym, GOT_TYPE_TPREL)); |
8683 | value = object->local_got_offset(r_sym, GOT_TYPE_TPREL); | |
8684 | } | |
8685 | value -= target->got_section()->got_base_offset(object); | |
8686 | } | |
8687 | else | |
8688 | { | |
8689 | gold_assert(tls_type == tls::TLSOPT_TO_LE); | |
8690 | if (r_type == elfcpp::R_POWERPC_GOT_TPREL16 | |
8691 | || r_type == elfcpp::R_POWERPC_GOT_TPREL16_LO) | |
8692 | { | |
dcfc7dd4 | 8693 | Insn* iview = reinterpret_cast<Insn*>(view - d_offset); |
dd93cd0a AM |
8694 | Insn insn = elfcpp::Swap<32, big_endian>::readval(iview); |
8695 | insn &= (1 << 26) - (1 << 21); // extract rt from ld | |
8696 | if (size == 32) | |
8697 | insn |= addis_0_2; | |
8698 | else | |
8699 | insn |= addis_0_13; | |
8700 | elfcpp::Swap<32, big_endian>::writeval(iview, insn); | |
8701 | r_type = elfcpp::R_POWERPC_TPREL16_HA; | |
8702 | value = psymval->value(object, rela.get_r_addend()); | |
8703 | } | |
8704 | else | |
8705 | { | |
dcfc7dd4 | 8706 | Insn* iview = reinterpret_cast<Insn*>(view - d_offset); |
dd93cd0a AM |
8707 | Insn insn = nop; |
8708 | elfcpp::Swap<32, big_endian>::writeval(iview, insn); | |
8709 | r_type = elfcpp::R_POWERPC_NONE; | |
8710 | } | |
8711 | } | |
8712 | } | |
8713 | else if ((size == 64 && r_type == elfcpp::R_PPC64_TLSGD) | |
8714 | || (size == 32 && r_type == elfcpp::R_PPC_TLSGD)) | |
8715 | { | |
8716 | // Second instruction of a global dynamic sequence, | |
8717 | // the __tls_get_addr call | |
e3deeb9c | 8718 | this->expect_tls_get_addr_call(relinfo, relnum, rela.get_r_offset()); |
dd93cd0a AM |
8719 | const bool final = gsym == NULL || gsym->final_value_is_known(); |
8720 | const tls::Tls_optimization tls_type = target->optimize_tls_gd(final); | |
8721 | if (tls_type != tls::TLSOPT_NONE) | |
8722 | { | |
8723 | if (tls_type == tls::TLSOPT_TO_IE) | |
8724 | { | |
8725 | Insn* iview = reinterpret_cast<Insn*>(view); | |
8726 | Insn insn = add_3_3_13; | |
8727 | if (size == 32) | |
8728 | insn = add_3_3_2; | |
8729 | elfcpp::Swap<32, big_endian>::writeval(iview, insn); | |
8730 | r_type = elfcpp::R_POWERPC_NONE; | |
8731 | } | |
8732 | else | |
8733 | { | |
8734 | Insn* iview = reinterpret_cast<Insn*>(view); | |
8735 | Insn insn = addi_3_3; | |
8736 | elfcpp::Swap<32, big_endian>::writeval(iview, insn); | |
8737 | r_type = elfcpp::R_POWERPC_TPREL16_LO; | |
dcfc7dd4 | 8738 | view += d_offset; |
dd93cd0a AM |
8739 | value = psymval->value(object, rela.get_r_addend()); |
8740 | } | |
e3deeb9c | 8741 | this->skip_next_tls_get_addr_call(); |
dd93cd0a AM |
8742 | } |
8743 | } | |
8744 | else if ((size == 64 && r_type == elfcpp::R_PPC64_TLSLD) | |
8745 | || (size == 32 && r_type == elfcpp::R_PPC_TLSLD)) | |
8746 | { | |
8747 | // Second instruction of a local dynamic sequence, | |
8748 | // the __tls_get_addr call | |
e3deeb9c | 8749 | this->expect_tls_get_addr_call(relinfo, relnum, rela.get_r_offset()); |
dd93cd0a AM |
8750 | const tls::Tls_optimization tls_type = target->optimize_tls_ld(); |
8751 | if (tls_type == tls::TLSOPT_TO_LE) | |
8752 | { | |
8753 | Insn* iview = reinterpret_cast<Insn*>(view); | |
8754 | Insn insn = addi_3_3; | |
8755 | elfcpp::Swap<32, big_endian>::writeval(iview, insn); | |
e3deeb9c | 8756 | this->skip_next_tls_get_addr_call(); |
dd93cd0a | 8757 | r_type = elfcpp::R_POWERPC_TPREL16_LO; |
dcfc7dd4 | 8758 | view += d_offset; |
7404fe1b | 8759 | value = dtp_offset; |
dd93cd0a AM |
8760 | } |
8761 | } | |
8762 | else if (r_type == elfcpp::R_POWERPC_TLS) | |
8763 | { | |
8764 | // Second instruction of an initial exec sequence | |
8765 | const bool final = gsym == NULL || gsym->final_value_is_known(); | |
8766 | const tls::Tls_optimization tls_type = target->optimize_tls_ie(final); | |
8767 | if (tls_type == tls::TLSOPT_TO_LE) | |
8768 | { | |
8769 | Insn* iview = reinterpret_cast<Insn*>(view); | |
8770 | Insn insn = elfcpp::Swap<32, big_endian>::readval(iview); | |
8771 | unsigned int reg = size == 32 ? 2 : 13; | |
8772 | insn = at_tls_transform(insn, reg); | |
8773 | gold_assert(insn != 0); | |
8774 | elfcpp::Swap<32, big_endian>::writeval(iview, insn); | |
8775 | r_type = elfcpp::R_POWERPC_TPREL16_LO; | |
dcfc7dd4 | 8776 | view += d_offset; |
dd93cd0a AM |
8777 | value = psymval->value(object, rela.get_r_addend()); |
8778 | } | |
8779 | } | |
0cfb0717 | 8780 | else if (!has_stub_value) |
cf43a2fe | 8781 | { |
dd93cd0a | 8782 | Address addend = 0; |
cbcb23fa | 8783 | if (!(size == 32 && r_type == elfcpp::R_PPC_PLTREL24)) |
cf43a2fe | 8784 | addend = rela.get_r_addend(); |
c9824451 | 8785 | value = psymval->value(object, addend); |
dd93cd0a | 8786 | if (size == 64 && is_branch_reloc(r_type)) |
9055360d AM |
8787 | { |
8788 | if (target->abiversion() >= 2) | |
8789 | { | |
8790 | if (gsym != NULL) | |
8791 | value += object->ppc64_local_entry_offset(gsym); | |
8792 | else | |
8793 | value += object->ppc64_local_entry_offset(r_sym); | |
8794 | } | |
8795 | else | |
1611bc4a AM |
8796 | { |
8797 | unsigned int dest_shndx; | |
8798 | target->symval_for_branch(relinfo->symtab, gsym, object, | |
8799 | &value, &dest_shndx); | |
8800 | } | |
9055360d | 8801 | } |
cbcb23fa | 8802 | Address max_branch_offset = max_branch_delta(r_type); |
ec661b9d AM |
8803 | if (max_branch_offset != 0 |
8804 | && value - address + max_branch_offset >= 2 * max_branch_offset) | |
8805 | { | |
8806 | Stub_table<size, big_endian>* stub_table | |
8807 | = object->stub_table(relinfo->data_shndx); | |
0cfdc767 AM |
8808 | if (stub_table != NULL) |
8809 | { | |
8810 | Address off = stub_table->find_long_branch_entry(object, value); | |
8811 | if (off != invalid_address) | |
0cfb0717 AM |
8812 | { |
8813 | value = (stub_table->stub_address() + stub_table->plt_size() | |
8814 | + off); | |
8815 | has_stub_value = true; | |
8816 | } | |
0cfdc767 | 8817 | } |
ec661b9d | 8818 | } |
42cacb20 DE |
8819 | } |
8820 | ||
42cacb20 DE |
8821 | switch (r_type) |
8822 | { | |
dd93cd0a AM |
8823 | case elfcpp::R_PPC64_REL64: |
8824 | case elfcpp::R_POWERPC_REL32: | |
8825 | case elfcpp::R_POWERPC_REL24: | |
8826 | case elfcpp::R_PPC_PLTREL24: | |
8827 | case elfcpp::R_PPC_LOCAL24PC: | |
8828 | case elfcpp::R_POWERPC_REL16: | |
8829 | case elfcpp::R_POWERPC_REL16_LO: | |
8830 | case elfcpp::R_POWERPC_REL16_HI: | |
8831 | case elfcpp::R_POWERPC_REL16_HA: | |
a680de9a | 8832 | case elfcpp::R_POWERPC_REL16DX_HA: |
dd93cd0a AM |
8833 | case elfcpp::R_POWERPC_REL14: |
8834 | case elfcpp::R_POWERPC_REL14_BRTAKEN: | |
8835 | case elfcpp::R_POWERPC_REL14_BRNTAKEN: | |
8836 | value -= address; | |
8837 | break; | |
8838 | ||
42cacb20 DE |
8839 | case elfcpp::R_PPC64_TOC16: |
8840 | case elfcpp::R_PPC64_TOC16_LO: | |
8841 | case elfcpp::R_PPC64_TOC16_HI: | |
8842 | case elfcpp::R_PPC64_TOC16_HA: | |
8843 | case elfcpp::R_PPC64_TOC16_DS: | |
8844 | case elfcpp::R_PPC64_TOC16_LO_DS: | |
cf43a2fe | 8845 | // Subtract the TOC base address. |
c9269dff | 8846 | value -= (target->got_section()->output_section()->address() |
dd93cd0a | 8847 | + object->toc_base_offset()); |
42cacb20 DE |
8848 | break; |
8849 | ||
cf43a2fe AM |
8850 | case elfcpp::R_POWERPC_SECTOFF: |
8851 | case elfcpp::R_POWERPC_SECTOFF_LO: | |
8852 | case elfcpp::R_POWERPC_SECTOFF_HI: | |
8853 | case elfcpp::R_POWERPC_SECTOFF_HA: | |
8854 | case elfcpp::R_PPC64_SECTOFF_DS: | |
8855 | case elfcpp::R_PPC64_SECTOFF_LO_DS: | |
8856 | if (os != NULL) | |
8857 | value -= os->address(); | |
42cacb20 DE |
8858 | break; |
8859 | ||
dd93cd0a AM |
8860 | case elfcpp::R_PPC64_TPREL16_DS: |
8861 | case elfcpp::R_PPC64_TPREL16_LO_DS: | |
f9c6b907 AM |
8862 | case elfcpp::R_PPC64_TPREL16_HIGH: |
8863 | case elfcpp::R_PPC64_TPREL16_HIGHA: | |
dd93cd0a | 8864 | if (size != 64) |
f9c6b907 | 8865 | // R_PPC_TLSGD, R_PPC_TLSLD, R_PPC_EMB_RELST_LO, R_PPC_EMB_RELST_HI |
dd93cd0a | 8866 | break; |
d8e90251 | 8867 | // Fall through. |
dd93cd0a AM |
8868 | case elfcpp::R_POWERPC_TPREL16: |
8869 | case elfcpp::R_POWERPC_TPREL16_LO: | |
8870 | case elfcpp::R_POWERPC_TPREL16_HI: | |
8871 | case elfcpp::R_POWERPC_TPREL16_HA: | |
8872 | case elfcpp::R_POWERPC_TPREL: | |
8873 | case elfcpp::R_PPC64_TPREL16_HIGHER: | |
8874 | case elfcpp::R_PPC64_TPREL16_HIGHERA: | |
8875 | case elfcpp::R_PPC64_TPREL16_HIGHEST: | |
8876 | case elfcpp::R_PPC64_TPREL16_HIGHESTA: | |
8877 | // tls symbol values are relative to tls_segment()->vaddr() | |
8878 | value -= tp_offset; | |
8879 | break; | |
8880 | ||
8881 | case elfcpp::R_PPC64_DTPREL16_DS: | |
8882 | case elfcpp::R_PPC64_DTPREL16_LO_DS: | |
8883 | case elfcpp::R_PPC64_DTPREL16_HIGHER: | |
8884 | case elfcpp::R_PPC64_DTPREL16_HIGHERA: | |
8885 | case elfcpp::R_PPC64_DTPREL16_HIGHEST: | |
8886 | case elfcpp::R_PPC64_DTPREL16_HIGHESTA: | |
8887 | if (size != 64) | |
8888 | // R_PPC_EMB_NADDR32, R_PPC_EMB_NADDR16, R_PPC_EMB_NADDR16_LO | |
8889 | // R_PPC_EMB_NADDR16_HI, R_PPC_EMB_NADDR16_HA, R_PPC_EMB_SDAI16 | |
8890 | break; | |
d8e90251 | 8891 | // Fall through. |
dd93cd0a AM |
8892 | case elfcpp::R_POWERPC_DTPREL16: |
8893 | case elfcpp::R_POWERPC_DTPREL16_LO: | |
8894 | case elfcpp::R_POWERPC_DTPREL16_HI: | |
8895 | case elfcpp::R_POWERPC_DTPREL16_HA: | |
8896 | case elfcpp::R_POWERPC_DTPREL: | |
f9c6b907 AM |
8897 | case elfcpp::R_PPC64_DTPREL16_HIGH: |
8898 | case elfcpp::R_PPC64_DTPREL16_HIGHA: | |
dd93cd0a AM |
8899 | // tls symbol values are relative to tls_segment()->vaddr() |
8900 | value -= dtp_offset; | |
8901 | break; | |
8902 | ||
45965137 AM |
8903 | case elfcpp::R_PPC64_ADDR64_LOCAL: |
8904 | if (gsym != NULL) | |
8905 | value += object->ppc64_local_entry_offset(gsym); | |
8906 | else | |
8907 | value += object->ppc64_local_entry_offset(r_sym); | |
8908 | break; | |
8909 | ||
42cacb20 DE |
8910 | default: |
8911 | break; | |
8912 | } | |
8913 | ||
dd93cd0a | 8914 | Insn branch_bit = 0; |
42cacb20 DE |
8915 | switch (r_type) |
8916 | { | |
dd93cd0a AM |
8917 | case elfcpp::R_POWERPC_ADDR14_BRTAKEN: |
8918 | case elfcpp::R_POWERPC_REL14_BRTAKEN: | |
8919 | branch_bit = 1 << 21; | |
d8e90251 | 8920 | // Fall through. |
dd93cd0a AM |
8921 | case elfcpp::R_POWERPC_ADDR14_BRNTAKEN: |
8922 | case elfcpp::R_POWERPC_REL14_BRNTAKEN: | |
8923 | { | |
8924 | Insn* iview = reinterpret_cast<Insn*>(view); | |
8925 | Insn insn = elfcpp::Swap<32, big_endian>::readval(iview); | |
8926 | insn &= ~(1 << 21); | |
8927 | insn |= branch_bit; | |
8928 | if (this->is_isa_v2) | |
8929 | { | |
8930 | // Set 'a' bit. This is 0b00010 in BO field for branch | |
8931 | // on CR(BI) insns (BO == 001at or 011at), and 0b01000 | |
8932 | // for branch on CTR insns (BO == 1a00t or 1a01t). | |
8933 | if ((insn & (0x14 << 21)) == (0x04 << 21)) | |
8934 | insn |= 0x02 << 21; | |
8935 | else if ((insn & (0x14 << 21)) == (0x10 << 21)) | |
8936 | insn |= 0x08 << 21; | |
8937 | else | |
8938 | break; | |
8939 | } | |
8940 | else | |
8941 | { | |
8942 | // Invert 'y' bit if not the default. | |
8943 | if (static_cast<Signed_address>(value) < 0) | |
8944 | insn ^= 1 << 21; | |
8945 | } | |
8946 | elfcpp::Swap<32, big_endian>::writeval(iview, insn); | |
8947 | } | |
8948 | break; | |
8949 | ||
8950 | default: | |
8951 | break; | |
8952 | } | |
8953 | ||
aba6bc71 AM |
8954 | if (size == 64) |
8955 | { | |
aba6bc71 AM |
8956 | switch (r_type) |
8957 | { | |
8958 | default: | |
8959 | break; | |
8960 | ||
5edad15d AM |
8961 | // Multi-instruction sequences that access the GOT/TOC can |
8962 | // be optimized, eg. | |
8963 | // addis ra,r2,x@got@ha; ld rb,x@got@l(ra); | |
8964 | // to addis ra,r2,x@toc@ha; addi rb,ra,x@toc@l; | |
8965 | // and | |
8966 | // addis ra,r2,0; addi rb,ra,x@toc@l; | |
8967 | // to nop; addi rb,r2,x@toc; | |
8968 | // FIXME: the @got sequence shown above is not yet | |
8969 | // optimized. Note that gcc as of 2017-01-07 doesn't use | |
8970 | // the ELF @got relocs except for TLS, instead using the | |
8971 | // PowerOpen variant of a compiler managed GOT (called TOC). | |
8972 | // The PowerOpen TOC sequence equivalent to the first | |
8973 | // example is optimized. | |
aba6bc71 AM |
8974 | case elfcpp::R_POWERPC_GOT_TLSLD16_HA: |
8975 | case elfcpp::R_POWERPC_GOT_TLSGD16_HA: | |
8976 | case elfcpp::R_POWERPC_GOT_TPREL16_HA: | |
8977 | case elfcpp::R_POWERPC_GOT_DTPREL16_HA: | |
8978 | case elfcpp::R_POWERPC_GOT16_HA: | |
8979 | case elfcpp::R_PPC64_TOC16_HA: | |
d8f5a274 | 8980 | if (parameters->options().toc_optimize()) |
aba6bc71 | 8981 | { |
dcfc7dd4 | 8982 | Insn* iview = reinterpret_cast<Insn*>(view - d_offset); |
aba6bc71 | 8983 | Insn insn = elfcpp::Swap<32, big_endian>::readval(iview); |
5edad15d AM |
8984 | if (r_type == elfcpp::R_PPC64_TOC16_HA |
8985 | && object->make_toc_relative(target, &value)) | |
8986 | { | |
8987 | gold_assert((insn & ((0x3f << 26) | 0x1f << 16)) | |
8988 | == ((15u << 26) | (2 << 16))); | |
8989 | } | |
8990 | if (((insn & ((0x3f << 26) | 0x1f << 16)) | |
8991 | == ((15u << 26) | (2 << 16)) /* addis rt,2,imm */) | |
8992 | && value + 0x8000 < 0x10000) | |
aba6bc71 AM |
8993 | { |
8994 | elfcpp::Swap<32, big_endian>::writeval(iview, nop); | |
8995 | return true; | |
8996 | } | |
8997 | } | |
8998 | break; | |
8999 | ||
9000 | case elfcpp::R_POWERPC_GOT_TLSLD16_LO: | |
9001 | case elfcpp::R_POWERPC_GOT_TLSGD16_LO: | |
9002 | case elfcpp::R_POWERPC_GOT_TPREL16_LO: | |
9003 | case elfcpp::R_POWERPC_GOT_DTPREL16_LO: | |
9004 | case elfcpp::R_POWERPC_GOT16_LO: | |
9005 | case elfcpp::R_PPC64_GOT16_LO_DS: | |
9006 | case elfcpp::R_PPC64_TOC16_LO: | |
9007 | case elfcpp::R_PPC64_TOC16_LO_DS: | |
d8f5a274 | 9008 | if (parameters->options().toc_optimize()) |
aba6bc71 | 9009 | { |
dcfc7dd4 | 9010 | Insn* iview = reinterpret_cast<Insn*>(view - d_offset); |
aba6bc71 | 9011 | Insn insn = elfcpp::Swap<32, big_endian>::readval(iview); |
5edad15d AM |
9012 | bool changed = false; |
9013 | if (r_type == elfcpp::R_PPC64_TOC16_LO_DS | |
9014 | && object->make_toc_relative(target, &value)) | |
9015 | { | |
9016 | gold_assert ((insn & (0x3f << 26)) == 58u << 26 /* ld */); | |
9017 | insn ^= (14u << 26) ^ (58u << 26); | |
9018 | r_type = elfcpp::R_PPC64_TOC16_LO; | |
9019 | changed = true; | |
9020 | } | |
9021 | if (ok_lo_toc_insn(insn, r_type) | |
9022 | && value + 0x8000 < 0x10000) | |
aba6bc71 AM |
9023 | { |
9024 | if ((insn & (0x3f << 26)) == 12u << 26 /* addic */) | |
9025 | { | |
9026 | // Transform addic to addi when we change reg. | |
9027 | insn &= ~((0x3f << 26) | (0x1f << 16)); | |
9028 | insn |= (14u << 26) | (2 << 16); | |
9029 | } | |
9030 | else | |
9031 | { | |
9032 | insn &= ~(0x1f << 16); | |
9033 | insn |= 2 << 16; | |
9034 | } | |
5edad15d | 9035 | changed = true; |
aba6bc71 | 9036 | } |
5edad15d AM |
9037 | if (changed) |
9038 | elfcpp::Swap<32, big_endian>::writeval(iview, insn); | |
aba6bc71 AM |
9039 | } |
9040 | break; | |
549dba71 | 9041 | |
9a23f96e AM |
9042 | case elfcpp::R_POWERPC_TPREL16_HA: |
9043 | if (parameters->options().tls_optimize() && value + 0x8000 < 0x10000) | |
9044 | { | |
9045 | Insn* iview = reinterpret_cast<Insn*>(view - d_offset); | |
9046 | Insn insn = elfcpp::Swap<32, big_endian>::readval(iview); | |
9047 | if ((insn & ((0x3f << 26) | 0x1f << 16)) | |
9048 | != ((15u << 26) | ((size == 32 ? 2 : 13) << 16))) | |
9049 | ; | |
9050 | else | |
9051 | { | |
9052 | elfcpp::Swap<32, big_endian>::writeval(iview, nop); | |
9053 | return true; | |
9054 | } | |
9055 | } | |
9056 | break; | |
9057 | ||
9058 | case elfcpp::R_PPC64_TPREL16_LO_DS: | |
9059 | if (size == 32) | |
9060 | // R_PPC_TLSGD, R_PPC_TLSLD | |
9061 | break; | |
9062 | // Fall through. | |
9063 | case elfcpp::R_POWERPC_TPREL16_LO: | |
9064 | if (parameters->options().tls_optimize() && value + 0x8000 < 0x10000) | |
9065 | { | |
9066 | Insn* iview = reinterpret_cast<Insn*>(view - d_offset); | |
9067 | Insn insn = elfcpp::Swap<32, big_endian>::readval(iview); | |
9068 | insn &= ~(0x1f << 16); | |
9069 | insn |= (size == 32 ? 2 : 13) << 16; | |
9070 | elfcpp::Swap<32, big_endian>::writeval(iview, insn); | |
9071 | } | |
9072 | break; | |
9073 | ||
549dba71 AM |
9074 | case elfcpp::R_PPC64_ENTRY: |
9075 | value = (target->got_section()->output_section()->address() | |
9076 | + object->toc_base_offset()); | |
9077 | if (value + 0x80008000 <= 0xffffffff | |
9078 | && !parameters->options().output_is_position_independent()) | |
9079 | { | |
9080 | Insn* iview = reinterpret_cast<Insn*>(view); | |
9081 | Insn insn1 = elfcpp::Swap<32, big_endian>::readval(iview); | |
9082 | Insn insn2 = elfcpp::Swap<32, big_endian>::readval(iview + 1); | |
9083 | ||
9084 | if ((insn1 & ~0xfffc) == ld_2_12 | |
9085 | && insn2 == add_2_2_12) | |
9086 | { | |
9087 | insn1 = lis_2 + ha(value); | |
9088 | elfcpp::Swap<32, big_endian>::writeval(iview, insn1); | |
9089 | insn2 = addi_2_2 + l(value); | |
9090 | elfcpp::Swap<32, big_endian>::writeval(iview + 1, insn2); | |
9091 | return true; | |
9092 | } | |
9093 | } | |
9094 | else | |
9095 | { | |
9096 | value -= address; | |
9097 | if (value + 0x80008000 <= 0xffffffff) | |
9098 | { | |
9099 | Insn* iview = reinterpret_cast<Insn*>(view); | |
9100 | Insn insn1 = elfcpp::Swap<32, big_endian>::readval(iview); | |
9101 | Insn insn2 = elfcpp::Swap<32, big_endian>::readval(iview + 1); | |
9102 | ||
9103 | if ((insn1 & ~0xfffc) == ld_2_12 | |
9104 | && insn2 == add_2_2_12) | |
9105 | { | |
9106 | insn1 = addis_2_12 + ha(value); | |
9107 | elfcpp::Swap<32, big_endian>::writeval(iview, insn1); | |
9108 | insn2 = addi_2_2 + l(value); | |
9109 | elfcpp::Swap<32, big_endian>::writeval(iview + 1, insn2); | |
9110 | return true; | |
9111 | } | |
9112 | } | |
9113 | } | |
9114 | break; | |
e3a7574e AM |
9115 | |
9116 | case elfcpp::R_POWERPC_REL16_LO: | |
9117 | // If we are generating a non-PIC executable, edit | |
9118 | // 0: addis 2,12,.TOC.-0b@ha | |
9119 | // addi 2,2,.TOC.-0b@l | |
9120 | // used by ELFv2 global entry points to set up r2, to | |
9121 | // lis 2,.TOC.@ha | |
9122 | // addi 2,2,.TOC.@l | |
9123 | // if .TOC. is in range. */ | |
9124 | if (value + address - 4 + 0x80008000 <= 0xffffffff | |
9125 | && relnum != 0 | |
9126 | && preloc != NULL | |
9127 | && target->abiversion() >= 2 | |
9128 | && !parameters->options().output_is_position_independent() | |
4f038ee5 | 9129 | && rela.get_r_addend() == d_offset + 4 |
e3a7574e AM |
9130 | && gsym != NULL |
9131 | && strcmp(gsym->name(), ".TOC.") == 0) | |
9132 | { | |
0e123f69 | 9133 | const int reloc_size = elfcpp::Elf_sizes<size>::rela_size; |
e3a7574e AM |
9134 | Reltype prev_rela(preloc - reloc_size); |
9135 | if ((prev_rela.get_r_info() | |
9136 | == elfcpp::elf_r_info<size>(r_sym, | |
9137 | elfcpp::R_POWERPC_REL16_HA)) | |
9138 | && prev_rela.get_r_offset() + 4 == rela.get_r_offset() | |
9139 | && prev_rela.get_r_addend() + 4 == rela.get_r_addend()) | |
9140 | { | |
dcfc7dd4 | 9141 | Insn* iview = reinterpret_cast<Insn*>(view - d_offset); |
e3a7574e AM |
9142 | Insn insn1 = elfcpp::Swap<32, big_endian>::readval(iview - 1); |
9143 | Insn insn2 = elfcpp::Swap<32, big_endian>::readval(iview); | |
9144 | ||
9145 | if ((insn1 & 0xffff0000) == addis_2_12 | |
9146 | && (insn2 & 0xffff0000) == addi_2_2) | |
9147 | { | |
9148 | insn1 = lis_2 + ha(value + address - 4); | |
9149 | elfcpp::Swap<32, big_endian>::writeval(iview - 1, insn1); | |
9150 | insn2 = addi_2_2 + l(value + address - 4); | |
9151 | elfcpp::Swap<32, big_endian>::writeval(iview, insn2); | |
9152 | if (relinfo->rr) | |
9153 | { | |
9154 | relinfo->rr->set_strategy(relnum - 1, | |
9155 | Relocatable_relocs::RELOC_SPECIAL); | |
9156 | relinfo->rr->set_strategy(relnum, | |
9157 | Relocatable_relocs::RELOC_SPECIAL); | |
9158 | } | |
9159 | return true; | |
9160 | } | |
9161 | } | |
9162 | } | |
9163 | break; | |
aba6bc71 AM |
9164 | } |
9165 | } | |
9166 | ||
f4baf0d4 | 9167 | typename Reloc::Overflow_check overflow = Reloc::CHECK_NONE; |
b80eed39 | 9168 | elfcpp::Shdr<size, big_endian> shdr(relinfo->data_shdr); |
dd93cd0a AM |
9169 | switch (r_type) |
9170 | { | |
9171 | case elfcpp::R_POWERPC_ADDR32: | |
9172 | case elfcpp::R_POWERPC_UADDR32: | |
9173 | if (size == 64) | |
f4baf0d4 | 9174 | overflow = Reloc::CHECK_BITFIELD; |
42cacb20 DE |
9175 | break; |
9176 | ||
9177 | case elfcpp::R_POWERPC_REL32: | |
a680de9a | 9178 | case elfcpp::R_POWERPC_REL16DX_HA: |
dd93cd0a | 9179 | if (size == 64) |
f4baf0d4 | 9180 | overflow = Reloc::CHECK_SIGNED; |
dd93cd0a AM |
9181 | break; |
9182 | ||
dd93cd0a | 9183 | case elfcpp::R_POWERPC_UADDR16: |
f4baf0d4 | 9184 | overflow = Reloc::CHECK_BITFIELD; |
42cacb20 DE |
9185 | break; |
9186 | ||
b80eed39 AM |
9187 | case elfcpp::R_POWERPC_ADDR16: |
9188 | // We really should have three separate relocations, | |
9189 | // one for 16-bit data, one for insns with 16-bit signed fields, | |
9190 | // and one for insns with 16-bit unsigned fields. | |
9191 | overflow = Reloc::CHECK_BITFIELD; | |
9192 | if ((shdr.get_sh_flags() & elfcpp::SHF_EXECINSTR) != 0) | |
9193 | overflow = Reloc::CHECK_LOW_INSN; | |
9194 | break; | |
9195 | ||
f9c6b907 AM |
9196 | case elfcpp::R_POWERPC_ADDR16_HI: |
9197 | case elfcpp::R_POWERPC_ADDR16_HA: | |
9198 | case elfcpp::R_POWERPC_GOT16_HI: | |
9199 | case elfcpp::R_POWERPC_GOT16_HA: | |
9200 | case elfcpp::R_POWERPC_PLT16_HI: | |
9201 | case elfcpp::R_POWERPC_PLT16_HA: | |
9202 | case elfcpp::R_POWERPC_SECTOFF_HI: | |
9203 | case elfcpp::R_POWERPC_SECTOFF_HA: | |
9204 | case elfcpp::R_PPC64_TOC16_HI: | |
9205 | case elfcpp::R_PPC64_TOC16_HA: | |
9206 | case elfcpp::R_PPC64_PLTGOT16_HI: | |
9207 | case elfcpp::R_PPC64_PLTGOT16_HA: | |
9208 | case elfcpp::R_POWERPC_TPREL16_HI: | |
9209 | case elfcpp::R_POWERPC_TPREL16_HA: | |
9210 | case elfcpp::R_POWERPC_DTPREL16_HI: | |
9211 | case elfcpp::R_POWERPC_DTPREL16_HA: | |
9212 | case elfcpp::R_POWERPC_GOT_TLSGD16_HI: | |
9213 | case elfcpp::R_POWERPC_GOT_TLSGD16_HA: | |
9214 | case elfcpp::R_POWERPC_GOT_TLSLD16_HI: | |
9215 | case elfcpp::R_POWERPC_GOT_TLSLD16_HA: | |
9216 | case elfcpp::R_POWERPC_GOT_TPREL16_HI: | |
9217 | case elfcpp::R_POWERPC_GOT_TPREL16_HA: | |
9218 | case elfcpp::R_POWERPC_GOT_DTPREL16_HI: | |
9219 | case elfcpp::R_POWERPC_GOT_DTPREL16_HA: | |
9220 | case elfcpp::R_POWERPC_REL16_HI: | |
9221 | case elfcpp::R_POWERPC_REL16_HA: | |
b80eed39 AM |
9222 | if (size != 32) |
9223 | overflow = Reloc::CHECK_HIGH_INSN; | |
9224 | break; | |
9225 | ||
dd93cd0a AM |
9226 | case elfcpp::R_POWERPC_REL16: |
9227 | case elfcpp::R_PPC64_TOC16: | |
9228 | case elfcpp::R_POWERPC_GOT16: | |
9229 | case elfcpp::R_POWERPC_SECTOFF: | |
9230 | case elfcpp::R_POWERPC_TPREL16: | |
9231 | case elfcpp::R_POWERPC_DTPREL16: | |
b80eed39 AM |
9232 | case elfcpp::R_POWERPC_GOT_TLSGD16: |
9233 | case elfcpp::R_POWERPC_GOT_TLSLD16: | |
9234 | case elfcpp::R_POWERPC_GOT_TPREL16: | |
9235 | case elfcpp::R_POWERPC_GOT_DTPREL16: | |
9236 | overflow = Reloc::CHECK_LOW_INSN; | |
9237 | break; | |
9238 | ||
9239 | case elfcpp::R_POWERPC_ADDR24: | |
9240 | case elfcpp::R_POWERPC_ADDR14: | |
9241 | case elfcpp::R_POWERPC_ADDR14_BRTAKEN: | |
9242 | case elfcpp::R_POWERPC_ADDR14_BRNTAKEN: | |
9243 | case elfcpp::R_PPC64_ADDR16_DS: | |
9244 | case elfcpp::R_POWERPC_REL24: | |
9245 | case elfcpp::R_PPC_PLTREL24: | |
9246 | case elfcpp::R_PPC_LOCAL24PC: | |
dd93cd0a AM |
9247 | case elfcpp::R_PPC64_TPREL16_DS: |
9248 | case elfcpp::R_PPC64_DTPREL16_DS: | |
9249 | case elfcpp::R_PPC64_TOC16_DS: | |
9250 | case elfcpp::R_PPC64_GOT16_DS: | |
9251 | case elfcpp::R_PPC64_SECTOFF_DS: | |
9252 | case elfcpp::R_POWERPC_REL14: | |
9253 | case elfcpp::R_POWERPC_REL14_BRTAKEN: | |
9254 | case elfcpp::R_POWERPC_REL14_BRNTAKEN: | |
f4baf0d4 | 9255 | overflow = Reloc::CHECK_SIGNED; |
42cacb20 | 9256 | break; |
dd93cd0a | 9257 | } |
42cacb20 | 9258 | |
dcfc7dd4 | 9259 | Insn* iview = reinterpret_cast<Insn*>(view - d_offset); |
a680de9a PB |
9260 | Insn insn = 0; |
9261 | ||
b80eed39 AM |
9262 | if (overflow == Reloc::CHECK_LOW_INSN |
9263 | || overflow == Reloc::CHECK_HIGH_INSN) | |
9264 | { | |
a680de9a | 9265 | insn = elfcpp::Swap<32, big_endian>::readval(iview); |
b80eed39 | 9266 | |
a47622ac AM |
9267 | if ((insn & (0x3f << 26)) == 10u << 26 /* cmpli */) |
9268 | overflow = Reloc::CHECK_BITFIELD; | |
9269 | else if (overflow == Reloc::CHECK_LOW_INSN | |
9270 | ? ((insn & (0x3f << 26)) == 28u << 26 /* andi */ | |
9271 | || (insn & (0x3f << 26)) == 24u << 26 /* ori */ | |
9272 | || (insn & (0x3f << 26)) == 26u << 26 /* xori */) | |
9273 | : ((insn & (0x3f << 26)) == 29u << 26 /* andis */ | |
9274 | || (insn & (0x3f << 26)) == 25u << 26 /* oris */ | |
9275 | || (insn & (0x3f << 26)) == 27u << 26 /* xoris */)) | |
b80eed39 | 9276 | overflow = Reloc::CHECK_UNSIGNED; |
e30880c2 CC |
9277 | else |
9278 | overflow = Reloc::CHECK_SIGNED; | |
b80eed39 AM |
9279 | } |
9280 | ||
a680de9a | 9281 | bool maybe_dq_reloc = false; |
3ea0a085 | 9282 | typename Powerpc_relocate_functions<size, big_endian>::Status status |
f4baf0d4 | 9283 | = Powerpc_relocate_functions<size, big_endian>::STATUS_OK; |
dd93cd0a AM |
9284 | switch (r_type) |
9285 | { | |
9286 | case elfcpp::R_POWERPC_NONE: | |
9287 | case elfcpp::R_POWERPC_TLS: | |
9288 | case elfcpp::R_POWERPC_GNU_VTINHERIT: | |
9289 | case elfcpp::R_POWERPC_GNU_VTENTRY: | |
42cacb20 DE |
9290 | break; |
9291 | ||
9292 | case elfcpp::R_PPC64_ADDR64: | |
dd93cd0a | 9293 | case elfcpp::R_PPC64_REL64: |
cf43a2fe | 9294 | case elfcpp::R_PPC64_TOC: |
45965137 | 9295 | case elfcpp::R_PPC64_ADDR64_LOCAL: |
dd93cd0a AM |
9296 | Reloc::addr64(view, value); |
9297 | break; | |
9298 | ||
9299 | case elfcpp::R_POWERPC_TPREL: | |
9300 | case elfcpp::R_POWERPC_DTPREL: | |
9301 | if (size == 64) | |
9302 | Reloc::addr64(view, value); | |
9303 | else | |
3ea0a085 | 9304 | status = Reloc::addr32(view, value, overflow); |
dd93cd0a AM |
9305 | break; |
9306 | ||
9307 | case elfcpp::R_PPC64_UADDR64: | |
9308 | Reloc::addr64_u(view, value); | |
42cacb20 DE |
9309 | break; |
9310 | ||
9311 | case elfcpp::R_POWERPC_ADDR32: | |
3ea0a085 | 9312 | status = Reloc::addr32(view, value, overflow); |
dd93cd0a AM |
9313 | break; |
9314 | ||
acc276d8 | 9315 | case elfcpp::R_POWERPC_REL32: |
dd93cd0a | 9316 | case elfcpp::R_POWERPC_UADDR32: |
3ea0a085 | 9317 | status = Reloc::addr32_u(view, value, overflow); |
dd93cd0a AM |
9318 | break; |
9319 | ||
9320 | case elfcpp::R_POWERPC_ADDR24: | |
9321 | case elfcpp::R_POWERPC_REL24: | |
9322 | case elfcpp::R_PPC_PLTREL24: | |
9323 | case elfcpp::R_PPC_LOCAL24PC: | |
3ea0a085 | 9324 | status = Reloc::addr24(view, value, overflow); |
42cacb20 DE |
9325 | break; |
9326 | ||
dd93cd0a AM |
9327 | case elfcpp::R_POWERPC_GOT_DTPREL16: |
9328 | case elfcpp::R_POWERPC_GOT_DTPREL16_LO: | |
ec86f434 AM |
9329 | case elfcpp::R_POWERPC_GOT_TPREL16: |
9330 | case elfcpp::R_POWERPC_GOT_TPREL16_LO: | |
dd93cd0a AM |
9331 | if (size == 64) |
9332 | { | |
ec86f434 | 9333 | // On ppc64 these are all ds form |
a680de9a | 9334 | maybe_dq_reloc = true; |
dd93cd0a AM |
9335 | break; |
9336 | } | |
c25aa1e1 | 9337 | // Fall through. |
cf43a2fe | 9338 | case elfcpp::R_POWERPC_ADDR16: |
dd93cd0a | 9339 | case elfcpp::R_POWERPC_REL16: |
cf43a2fe | 9340 | case elfcpp::R_PPC64_TOC16: |
42cacb20 | 9341 | case elfcpp::R_POWERPC_GOT16: |
cf43a2fe | 9342 | case elfcpp::R_POWERPC_SECTOFF: |
dd93cd0a AM |
9343 | case elfcpp::R_POWERPC_TPREL16: |
9344 | case elfcpp::R_POWERPC_DTPREL16: | |
9345 | case elfcpp::R_POWERPC_GOT_TLSGD16: | |
9346 | case elfcpp::R_POWERPC_GOT_TLSLD16: | |
cf43a2fe | 9347 | case elfcpp::R_POWERPC_ADDR16_LO: |
dd93cd0a | 9348 | case elfcpp::R_POWERPC_REL16_LO: |
cf43a2fe | 9349 | case elfcpp::R_PPC64_TOC16_LO: |
42cacb20 | 9350 | case elfcpp::R_POWERPC_GOT16_LO: |
cf43a2fe | 9351 | case elfcpp::R_POWERPC_SECTOFF_LO: |
dd93cd0a AM |
9352 | case elfcpp::R_POWERPC_TPREL16_LO: |
9353 | case elfcpp::R_POWERPC_DTPREL16_LO: | |
9354 | case elfcpp::R_POWERPC_GOT_TLSGD16_LO: | |
9355 | case elfcpp::R_POWERPC_GOT_TLSLD16_LO: | |
a680de9a PB |
9356 | if (size == 64) |
9357 | status = Reloc::addr16(view, value, overflow); | |
9358 | else | |
9359 | maybe_dq_reloc = true; | |
dd93cd0a AM |
9360 | break; |
9361 | ||
9362 | case elfcpp::R_POWERPC_UADDR16: | |
3ea0a085 | 9363 | status = Reloc::addr16_u(view, value, overflow); |
42cacb20 DE |
9364 | break; |
9365 | ||
f9c6b907 AM |
9366 | case elfcpp::R_PPC64_ADDR16_HIGH: |
9367 | case elfcpp::R_PPC64_TPREL16_HIGH: | |
9368 | case elfcpp::R_PPC64_DTPREL16_HIGH: | |
9369 | if (size == 32) | |
9370 | // R_PPC_EMB_MRKREF, R_PPC_EMB_RELST_LO, R_PPC_EMB_RELST_HA | |
9371 | goto unsupp; | |
d8e90251 | 9372 | // Fall through. |
cf43a2fe | 9373 | case elfcpp::R_POWERPC_ADDR16_HI: |
dd93cd0a | 9374 | case elfcpp::R_POWERPC_REL16_HI: |
cf43a2fe | 9375 | case elfcpp::R_PPC64_TOC16_HI: |
42cacb20 | 9376 | case elfcpp::R_POWERPC_GOT16_HI: |
cf43a2fe | 9377 | case elfcpp::R_POWERPC_SECTOFF_HI: |
dd93cd0a AM |
9378 | case elfcpp::R_POWERPC_TPREL16_HI: |
9379 | case elfcpp::R_POWERPC_DTPREL16_HI: | |
9380 | case elfcpp::R_POWERPC_GOT_TLSGD16_HI: | |
9381 | case elfcpp::R_POWERPC_GOT_TLSLD16_HI: | |
9382 | case elfcpp::R_POWERPC_GOT_TPREL16_HI: | |
9383 | case elfcpp::R_POWERPC_GOT_DTPREL16_HI: | |
9384 | Reloc::addr16_hi(view, value); | |
42cacb20 DE |
9385 | break; |
9386 | ||
f9c6b907 AM |
9387 | case elfcpp::R_PPC64_ADDR16_HIGHA: |
9388 | case elfcpp::R_PPC64_TPREL16_HIGHA: | |
9389 | case elfcpp::R_PPC64_DTPREL16_HIGHA: | |
9390 | if (size == 32) | |
9391 | // R_PPC_EMB_RELSEC16, R_PPC_EMB_RELST_HI, R_PPC_EMB_BIT_FLD | |
9392 | goto unsupp; | |
d8e90251 | 9393 | // Fall through. |
cf43a2fe | 9394 | case elfcpp::R_POWERPC_ADDR16_HA: |
dd93cd0a | 9395 | case elfcpp::R_POWERPC_REL16_HA: |
cf43a2fe | 9396 | case elfcpp::R_PPC64_TOC16_HA: |
42cacb20 | 9397 | case elfcpp::R_POWERPC_GOT16_HA: |
cf43a2fe | 9398 | case elfcpp::R_POWERPC_SECTOFF_HA: |
dd93cd0a AM |
9399 | case elfcpp::R_POWERPC_TPREL16_HA: |
9400 | case elfcpp::R_POWERPC_DTPREL16_HA: | |
9401 | case elfcpp::R_POWERPC_GOT_TLSGD16_HA: | |
9402 | case elfcpp::R_POWERPC_GOT_TLSLD16_HA: | |
9403 | case elfcpp::R_POWERPC_GOT_TPREL16_HA: | |
9404 | case elfcpp::R_POWERPC_GOT_DTPREL16_HA: | |
9405 | Reloc::addr16_ha(view, value); | |
42cacb20 DE |
9406 | break; |
9407 | ||
a680de9a PB |
9408 | case elfcpp::R_POWERPC_REL16DX_HA: |
9409 | status = Reloc::addr16dx_ha(view, value, overflow); | |
9410 | break; | |
9411 | ||
dd93cd0a AM |
9412 | case elfcpp::R_PPC64_DTPREL16_HIGHER: |
9413 | if (size == 32) | |
9414 | // R_PPC_EMB_NADDR16_LO | |
9415 | goto unsupp; | |
d8e90251 | 9416 | // Fall through. |
dd93cd0a AM |
9417 | case elfcpp::R_PPC64_ADDR16_HIGHER: |
9418 | case elfcpp::R_PPC64_TPREL16_HIGHER: | |
9419 | Reloc::addr16_hi2(view, value); | |
42cacb20 DE |
9420 | break; |
9421 | ||
dd93cd0a AM |
9422 | case elfcpp::R_PPC64_DTPREL16_HIGHERA: |
9423 | if (size == 32) | |
9424 | // R_PPC_EMB_NADDR16_HI | |
9425 | goto unsupp; | |
d8e90251 | 9426 | // Fall through. |
dd93cd0a AM |
9427 | case elfcpp::R_PPC64_ADDR16_HIGHERA: |
9428 | case elfcpp::R_PPC64_TPREL16_HIGHERA: | |
9429 | Reloc::addr16_ha2(view, value); | |
42cacb20 DE |
9430 | break; |
9431 | ||
dd93cd0a AM |
9432 | case elfcpp::R_PPC64_DTPREL16_HIGHEST: |
9433 | if (size == 32) | |
9434 | // R_PPC_EMB_NADDR16_HA | |
9435 | goto unsupp; | |
d8e90251 | 9436 | // Fall through. |
dd93cd0a AM |
9437 | case elfcpp::R_PPC64_ADDR16_HIGHEST: |
9438 | case elfcpp::R_PPC64_TPREL16_HIGHEST: | |
9439 | Reloc::addr16_hi3(view, value); | |
42cacb20 DE |
9440 | break; |
9441 | ||
dd93cd0a AM |
9442 | case elfcpp::R_PPC64_DTPREL16_HIGHESTA: |
9443 | if (size == 32) | |
9444 | // R_PPC_EMB_SDAI16 | |
9445 | goto unsupp; | |
d8e90251 | 9446 | // Fall through. |
dd93cd0a AM |
9447 | case elfcpp::R_PPC64_ADDR16_HIGHESTA: |
9448 | case elfcpp::R_PPC64_TPREL16_HIGHESTA: | |
9449 | Reloc::addr16_ha3(view, value); | |
9450 | break; | |
9451 | ||
9452 | case elfcpp::R_PPC64_DTPREL16_DS: | |
9453 | case elfcpp::R_PPC64_DTPREL16_LO_DS: | |
9454 | if (size == 32) | |
9455 | // R_PPC_EMB_NADDR32, R_PPC_EMB_NADDR16 | |
9456 | goto unsupp; | |
d8e90251 | 9457 | // Fall through. |
dd93cd0a AM |
9458 | case elfcpp::R_PPC64_TPREL16_DS: |
9459 | case elfcpp::R_PPC64_TPREL16_LO_DS: | |
9460 | if (size == 32) | |
9461 | // R_PPC_TLSGD, R_PPC_TLSLD | |
9462 | break; | |
d8e90251 | 9463 | // Fall through. |
cf43a2fe AM |
9464 | case elfcpp::R_PPC64_ADDR16_DS: |
9465 | case elfcpp::R_PPC64_ADDR16_LO_DS: | |
42cacb20 DE |
9466 | case elfcpp::R_PPC64_TOC16_DS: |
9467 | case elfcpp::R_PPC64_TOC16_LO_DS: | |
cf43a2fe AM |
9468 | case elfcpp::R_PPC64_GOT16_DS: |
9469 | case elfcpp::R_PPC64_GOT16_LO_DS: | |
9470 | case elfcpp::R_PPC64_SECTOFF_DS: | |
9471 | case elfcpp::R_PPC64_SECTOFF_LO_DS: | |
a680de9a | 9472 | maybe_dq_reloc = true; |
dd93cd0a AM |
9473 | break; |
9474 | ||
9475 | case elfcpp::R_POWERPC_ADDR14: | |
9476 | case elfcpp::R_POWERPC_ADDR14_BRTAKEN: | |
9477 | case elfcpp::R_POWERPC_ADDR14_BRNTAKEN: | |
9478 | case elfcpp::R_POWERPC_REL14: | |
9479 | case elfcpp::R_POWERPC_REL14_BRTAKEN: | |
9480 | case elfcpp::R_POWERPC_REL14_BRNTAKEN: | |
3ea0a085 | 9481 | status = Reloc::addr14(view, value, overflow); |
42cacb20 DE |
9482 | break; |
9483 | ||
9484 | case elfcpp::R_POWERPC_COPY: | |
9485 | case elfcpp::R_POWERPC_GLOB_DAT: | |
9486 | case elfcpp::R_POWERPC_JMP_SLOT: | |
9487 | case elfcpp::R_POWERPC_RELATIVE: | |
42cacb20 | 9488 | case elfcpp::R_POWERPC_DTPMOD: |
dd93cd0a AM |
9489 | case elfcpp::R_PPC64_JMP_IREL: |
9490 | case elfcpp::R_POWERPC_IRELATIVE: | |
42cacb20 DE |
9491 | gold_error_at_location(relinfo, relnum, rela.get_r_offset(), |
9492 | _("unexpected reloc %u in object file"), | |
9493 | r_type); | |
9494 | break; | |
9495 | ||
7e57d19e | 9496 | case elfcpp::R_PPC64_TOCSAVE: |
dd93cd0a | 9497 | if (size == 32) |
7e57d19e | 9498 | // R_PPC_EMB_SDA21 |
dd93cd0a AM |
9499 | goto unsupp; |
9500 | else | |
9501 | { | |
7e57d19e AM |
9502 | Symbol_location loc; |
9503 | loc.object = relinfo->object; | |
9504 | loc.shndx = relinfo->data_shndx; | |
9505 | loc.offset = rela.get_r_offset(); | |
9506 | Tocsave_loc::const_iterator p = target->tocsave_loc().find(loc); | |
9507 | if (p != target->tocsave_loc().end()) | |
9508 | { | |
9509 | // If we've generated plt calls using this tocsave, then | |
9510 | // the nop needs to be changed to save r2. | |
9511 | Insn* iview = reinterpret_cast<Insn*>(view); | |
9512 | if (elfcpp::Swap<32, big_endian>::readval(iview) == nop) | |
9513 | elfcpp::Swap<32, big_endian>:: | |
9514 | writeval(iview, std_2_1 + target->stk_toc()); | |
9515 | } | |
dd93cd0a AM |
9516 | } |
9517 | break; | |
9518 | ||
9519 | case elfcpp::R_PPC_EMB_SDA2I16: | |
9520 | case elfcpp::R_PPC_EMB_SDA2REL: | |
9521 | if (size == 32) | |
9522 | goto unsupp; | |
9523 | // R_PPC64_TLSGD, R_PPC64_TLSLD | |
6ce78956 AM |
9524 | break; |
9525 | ||
dd93cd0a AM |
9526 | case elfcpp::R_POWERPC_PLT32: |
9527 | case elfcpp::R_POWERPC_PLTREL32: | |
9528 | case elfcpp::R_POWERPC_PLT16_LO: | |
9529 | case elfcpp::R_POWERPC_PLT16_HI: | |
9530 | case elfcpp::R_POWERPC_PLT16_HA: | |
9531 | case elfcpp::R_PPC_SDAREL16: | |
9532 | case elfcpp::R_POWERPC_ADDR30: | |
9533 | case elfcpp::R_PPC64_PLT64: | |
9534 | case elfcpp::R_PPC64_PLTREL64: | |
9535 | case elfcpp::R_PPC64_PLTGOT16: | |
9536 | case elfcpp::R_PPC64_PLTGOT16_LO: | |
9537 | case elfcpp::R_PPC64_PLTGOT16_HI: | |
9538 | case elfcpp::R_PPC64_PLTGOT16_HA: | |
9539 | case elfcpp::R_PPC64_PLT16_LO_DS: | |
9540 | case elfcpp::R_PPC64_PLTGOT16_DS: | |
9541 | case elfcpp::R_PPC64_PLTGOT16_LO_DS: | |
dd93cd0a AM |
9542 | case elfcpp::R_PPC_EMB_RELSDA: |
9543 | case elfcpp::R_PPC_TOC16: | |
42cacb20 | 9544 | default: |
dd93cd0a | 9545 | unsupp: |
42cacb20 DE |
9546 | gold_error_at_location(relinfo, relnum, rela.get_r_offset(), |
9547 | _("unsupported reloc %u"), | |
9548 | r_type); | |
9549 | break; | |
9550 | } | |
a680de9a PB |
9551 | |
9552 | if (maybe_dq_reloc) | |
9553 | { | |
9554 | if (insn == 0) | |
9555 | insn = elfcpp::Swap<32, big_endian>::readval(iview); | |
9556 | ||
9557 | if ((insn & (0x3f << 26)) == 56u << 26 /* lq */ | |
9558 | || ((insn & (0x3f << 26)) == (61u << 26) /* lxv, stxv */ | |
9559 | && (insn & 3) == 1)) | |
9560 | status = Reloc::addr16_dq(view, value, overflow); | |
9561 | else if (size == 64 | |
9562 | || (insn & (0x3f << 26)) == 58u << 26 /* ld,ldu,lwa */ | |
9563 | || (insn & (0x3f << 26)) == 62u << 26 /* std,stdu,stq */ | |
9564 | || (insn & (0x3f << 26)) == 57u << 26 /* lfdp */ | |
9565 | || (insn & (0x3f << 26)) == 61u << 26 /* stfdp */) | |
9566 | status = Reloc::addr16_ds(view, value, overflow); | |
9567 | else | |
9568 | status = Reloc::addr16(view, value, overflow); | |
9569 | } | |
9570 | ||
0cfb0717 | 9571 | if (status != Powerpc_relocate_functions<size, big_endian>::STATUS_OK |
3ffaac20 AM |
9572 | && (has_stub_value |
9573 | || !(gsym != NULL | |
282c9750 | 9574 | && gsym->is_undefined() |
3ffaac20 | 9575 | && is_branch_reloc(r_type)))) |
0cfb0717 AM |
9576 | { |
9577 | gold_error_at_location(relinfo, relnum, rela.get_r_offset(), | |
9578 | _("relocation overflow")); | |
9579 | if (has_stub_value) | |
9580 | gold_info(_("try relinking with a smaller --stub-group-size")); | |
9581 | } | |
42cacb20 DE |
9582 | |
9583 | return true; | |
9584 | } | |
9585 | ||
42cacb20 DE |
9586 | // Relocate section data. |
9587 | ||
9588 | template<int size, bool big_endian> | |
9589 | void | |
9590 | Target_powerpc<size, big_endian>::relocate_section( | |
d83ce4e3 AM |
9591 | const Relocate_info<size, big_endian>* relinfo, |
9592 | unsigned int sh_type, | |
9593 | const unsigned char* prelocs, | |
9594 | size_t reloc_count, | |
9595 | Output_section* output_section, | |
9596 | bool needs_special_offset_handling, | |
9597 | unsigned char* view, | |
c9269dff | 9598 | Address address, |
d83ce4e3 AM |
9599 | section_size_type view_size, |
9600 | const Reloc_symbol_changes* reloc_symbol_changes) | |
42cacb20 DE |
9601 | { |
9602 | typedef Target_powerpc<size, big_endian> Powerpc; | |
9603 | typedef typename Target_powerpc<size, big_endian>::Relocate Powerpc_relocate; | |
168a4726 AM |
9604 | typedef typename Target_powerpc<size, big_endian>::Relocate_comdat_behavior |
9605 | Powerpc_comdat_behavior; | |
4d625b70 CC |
9606 | typedef gold::Default_classify_reloc<elfcpp::SHT_RELA, size, big_endian> |
9607 | Classify_reloc; | |
42cacb20 DE |
9608 | |
9609 | gold_assert(sh_type == elfcpp::SHT_RELA); | |
9610 | ||
4d625b70 CC |
9611 | gold::relocate_section<size, big_endian, Powerpc, Powerpc_relocate, |
9612 | Powerpc_comdat_behavior, Classify_reloc>( | |
42cacb20 DE |
9613 | relinfo, |
9614 | this, | |
9615 | prelocs, | |
9616 | reloc_count, | |
9617 | output_section, | |
9618 | needs_special_offset_handling, | |
9619 | view, | |
9620 | address, | |
364c7fa5 ILT |
9621 | view_size, |
9622 | reloc_symbol_changes); | |
42cacb20 DE |
9623 | } |
9624 | ||
4d625b70 | 9625 | template<int size, bool big_endian> |
cf43a2fe | 9626 | class Powerpc_scan_relocatable_reloc |
42cacb20 | 9627 | { |
cf43a2fe | 9628 | public: |
0e123f69 AM |
9629 | typedef typename elfcpp::Rela<size, big_endian> Reltype; |
9630 | static const int reloc_size = elfcpp::Elf_sizes<size>::rela_size; | |
4d625b70 CC |
9631 | static const int sh_type = elfcpp::SHT_RELA; |
9632 | ||
9633 | // Return the symbol referred to by the relocation. | |
9634 | static inline unsigned int | |
9635 | get_r_sym(const Reltype* reloc) | |
9636 | { return elfcpp::elf_r_sym<size>(reloc->get_r_info()); } | |
9637 | ||
9638 | // Return the type of the relocation. | |
9639 | static inline unsigned int | |
9640 | get_r_type(const Reltype* reloc) | |
9641 | { return elfcpp::elf_r_type<size>(reloc->get_r_info()); } | |
9642 | ||
cf43a2fe AM |
9643 | // Return the strategy to use for a local symbol which is not a |
9644 | // section symbol, given the relocation type. | |
9645 | inline Relocatable_relocs::Reloc_strategy | |
9646 | local_non_section_strategy(unsigned int r_type, Relobj*, unsigned int r_sym) | |
9647 | { | |
9648 | if (r_type == 0 && r_sym == 0) | |
9649 | return Relocatable_relocs::RELOC_DISCARD; | |
9650 | return Relocatable_relocs::RELOC_COPY; | |
9651 | } | |
9652 | ||
9653 | // Return the strategy to use for a local symbol which is a section | |
9654 | // symbol, given the relocation type. | |
9655 | inline Relocatable_relocs::Reloc_strategy | |
9656 | local_section_strategy(unsigned int, Relobj*) | |
9657 | { | |
9658 | return Relocatable_relocs::RELOC_ADJUST_FOR_SECTION_RELA; | |
9659 | } | |
9660 | ||
9661 | // Return the strategy to use for a global symbol, given the | |
9662 | // relocation type, the object, and the symbol index. | |
9663 | inline Relocatable_relocs::Reloc_strategy | |
9664 | global_strategy(unsigned int r_type, Relobj*, unsigned int) | |
9665 | { | |
9666 | if (r_type == elfcpp::R_PPC_PLTREL24) | |
9667 | return Relocatable_relocs::RELOC_SPECIAL; | |
9668 | return Relocatable_relocs::RELOC_COPY; | |
9669 | } | |
9670 | }; | |
42cacb20 DE |
9671 | |
9672 | // Scan the relocs during a relocatable link. | |
9673 | ||
9674 | template<int size, bool big_endian> | |
9675 | void | |
9676 | Target_powerpc<size, big_endian>::scan_relocatable_relocs( | |
d83ce4e3 AM |
9677 | Symbol_table* symtab, |
9678 | Layout* layout, | |
9679 | Sized_relobj_file<size, big_endian>* object, | |
9680 | unsigned int data_shndx, | |
9681 | unsigned int sh_type, | |
9682 | const unsigned char* prelocs, | |
9683 | size_t reloc_count, | |
9684 | Output_section* output_section, | |
9685 | bool needs_special_offset_handling, | |
9686 | size_t local_symbol_count, | |
9687 | const unsigned char* plocal_symbols, | |
9688 | Relocatable_relocs* rr) | |
42cacb20 | 9689 | { |
4d625b70 CC |
9690 | typedef Powerpc_scan_relocatable_reloc<size, big_endian> Scan_strategy; |
9691 | ||
42cacb20 DE |
9692 | gold_assert(sh_type == elfcpp::SHT_RELA); |
9693 | ||
4d625b70 | 9694 | gold::scan_relocatable_relocs<size, big_endian, Scan_strategy>( |
42cacb20 DE |
9695 | symtab, |
9696 | layout, | |
9697 | object, | |
9698 | data_shndx, | |
9699 | prelocs, | |
9700 | reloc_count, | |
9701 | output_section, | |
9702 | needs_special_offset_handling, | |
9703 | local_symbol_count, | |
9704 | plocal_symbols, | |
9705 | rr); | |
9706 | } | |
9707 | ||
4d625b70 CC |
9708 | // Scan the relocs for --emit-relocs. |
9709 | ||
9710 | template<int size, bool big_endian> | |
9711 | void | |
9712 | Target_powerpc<size, big_endian>::emit_relocs_scan( | |
9713 | Symbol_table* symtab, | |
9714 | Layout* layout, | |
9715 | Sized_relobj_file<size, big_endian>* object, | |
9716 | unsigned int data_shndx, | |
9717 | unsigned int sh_type, | |
9718 | const unsigned char* prelocs, | |
9719 | size_t reloc_count, | |
9720 | Output_section* output_section, | |
9721 | bool needs_special_offset_handling, | |
9722 | size_t local_symbol_count, | |
9723 | const unsigned char* plocal_syms, | |
9724 | Relocatable_relocs* rr) | |
9725 | { | |
9726 | typedef gold::Default_classify_reloc<elfcpp::SHT_RELA, size, big_endian> | |
9727 | Classify_reloc; | |
9728 | typedef gold::Default_emit_relocs_strategy<Classify_reloc> | |
9729 | Emit_relocs_strategy; | |
9730 | ||
9731 | gold_assert(sh_type == elfcpp::SHT_RELA); | |
9732 | ||
9733 | gold::scan_relocatable_relocs<size, big_endian, Emit_relocs_strategy>( | |
9734 | symtab, | |
9735 | layout, | |
9736 | object, | |
9737 | data_shndx, | |
9738 | prelocs, | |
9739 | reloc_count, | |
9740 | output_section, | |
9741 | needs_special_offset_handling, | |
9742 | local_symbol_count, | |
9743 | plocal_syms, | |
9744 | rr); | |
9745 | } | |
9746 | ||
7404fe1b | 9747 | // Emit relocations for a section. |
dd93cd0a AM |
9748 | // This is a modified version of the function by the same name in |
9749 | // target-reloc.h. Using relocate_special_relocatable for | |
9750 | // R_PPC_PLTREL24 would require duplication of the entire body of the | |
9751 | // loop, so we may as well duplicate the whole thing. | |
42cacb20 DE |
9752 | |
9753 | template<int size, bool big_endian> | |
9754 | void | |
7404fe1b | 9755 | Target_powerpc<size, big_endian>::relocate_relocs( |
42cacb20 DE |
9756 | const Relocate_info<size, big_endian>* relinfo, |
9757 | unsigned int sh_type, | |
9758 | const unsigned char* prelocs, | |
9759 | size_t reloc_count, | |
9760 | Output_section* output_section, | |
62fe925a | 9761 | typename elfcpp::Elf_types<size>::Elf_Off offset_in_output_section, |
cf43a2fe | 9762 | unsigned char*, |
dd93cd0a | 9763 | Address view_address, |
cf43a2fe | 9764 | section_size_type, |
42cacb20 DE |
9765 | unsigned char* reloc_view, |
9766 | section_size_type reloc_view_size) | |
9767 | { | |
9768 | gold_assert(sh_type == elfcpp::SHT_RELA); | |
9769 | ||
0e123f69 AM |
9770 | typedef typename elfcpp::Rela<size, big_endian> Reltype; |
9771 | typedef typename elfcpp::Rela_write<size, big_endian> Reltype_write; | |
9772 | const int reloc_size = elfcpp::Elf_sizes<size>::rela_size; | |
dcfc7dd4 AM |
9773 | // Offset from start of insn to d-field reloc. |
9774 | const int d_offset = big_endian ? 2 : 0; | |
cf43a2fe AM |
9775 | |
9776 | Powerpc_relobj<size, big_endian>* const object | |
9777 | = static_cast<Powerpc_relobj<size, big_endian>*>(relinfo->object); | |
9778 | const unsigned int local_count = object->local_symbol_count(); | |
9779 | unsigned int got2_shndx = object->got2_shndx(); | |
c9269dff | 9780 | Address got2_addend = 0; |
cf43a2fe | 9781 | if (got2_shndx != 0) |
c9269dff AM |
9782 | { |
9783 | got2_addend = object->get_output_section_offset(got2_shndx); | |
9784 | gold_assert(got2_addend != invalid_address); | |
9785 | } | |
cf43a2fe | 9786 | |
033bfb73 CC |
9787 | const bool relocatable = parameters->options().relocatable(); |
9788 | ||
cf43a2fe | 9789 | unsigned char* pwrite = reloc_view; |
7404fe1b | 9790 | bool zap_next = false; |
cf43a2fe AM |
9791 | for (size_t i = 0; i < reloc_count; ++i, prelocs += reloc_size) |
9792 | { | |
91a65d2f | 9793 | Relocatable_relocs::Reloc_strategy strategy = relinfo->rr->strategy(i); |
cf43a2fe AM |
9794 | if (strategy == Relocatable_relocs::RELOC_DISCARD) |
9795 | continue; | |
9796 | ||
9797 | Reltype reloc(prelocs); | |
9798 | Reltype_write reloc_write(pwrite); | |
9799 | ||
7404fe1b | 9800 | Address offset = reloc.get_r_offset(); |
cf43a2fe | 9801 | typename elfcpp::Elf_types<size>::Elf_WXword r_info = reloc.get_r_info(); |
7404fe1b AM |
9802 | unsigned int r_sym = elfcpp::elf_r_sym<size>(r_info); |
9803 | unsigned int r_type = elfcpp::elf_r_type<size>(r_info); | |
9804 | const unsigned int orig_r_sym = r_sym; | |
9805 | typename elfcpp::Elf_types<size>::Elf_Swxword addend | |
9806 | = reloc.get_r_addend(); | |
9807 | const Symbol* gsym = NULL; | |
9808 | ||
9809 | if (zap_next) | |
9810 | { | |
9811 | // We could arrange to discard these and other relocs for | |
9812 | // tls optimised sequences in the strategy methods, but for | |
9813 | // now do as BFD ld does. | |
9814 | r_type = elfcpp::R_POWERPC_NONE; | |
9815 | zap_next = false; | |
9816 | } | |
cf43a2fe AM |
9817 | |
9818 | // Get the new symbol index. | |
9215b98b | 9819 | Output_section* os = NULL; |
cf43a2fe AM |
9820 | if (r_sym < local_count) |
9821 | { | |
9822 | switch (strategy) | |
9823 | { | |
9824 | case Relocatable_relocs::RELOC_COPY: | |
9825 | case Relocatable_relocs::RELOC_SPECIAL: | |
7404fe1b | 9826 | if (r_sym != 0) |
dd93cd0a | 9827 | { |
7404fe1b AM |
9828 | r_sym = object->symtab_index(r_sym); |
9829 | gold_assert(r_sym != -1U); | |
dd93cd0a | 9830 | } |
cf43a2fe AM |
9831 | break; |
9832 | ||
9833 | case Relocatable_relocs::RELOC_ADJUST_FOR_SECTION_RELA: | |
9834 | { | |
9835 | // We are adjusting a section symbol. We need to find | |
9836 | // the symbol table index of the section symbol for | |
9837 | // the output section corresponding to input section | |
9838 | // in which this symbol is defined. | |
9839 | gold_assert(r_sym < local_count); | |
9840 | bool is_ordinary; | |
9841 | unsigned int shndx = | |
9842 | object->local_symbol_input_shndx(r_sym, &is_ordinary); | |
9843 | gold_assert(is_ordinary); | |
9215b98b | 9844 | os = object->output_section(shndx); |
cf43a2fe AM |
9845 | gold_assert(os != NULL); |
9846 | gold_assert(os->needs_symtab_index()); | |
7404fe1b | 9847 | r_sym = os->symtab_index(); |
cf43a2fe AM |
9848 | } |
9849 | break; | |
9850 | ||
9851 | default: | |
9852 | gold_unreachable(); | |
9853 | } | |
9854 | } | |
9855 | else | |
9856 | { | |
7404fe1b | 9857 | gsym = object->global_symbol(r_sym); |
cf43a2fe AM |
9858 | gold_assert(gsym != NULL); |
9859 | if (gsym->is_forwarder()) | |
9860 | gsym = relinfo->symtab->resolve_forwards(gsym); | |
9861 | ||
9862 | gold_assert(gsym->has_symtab_index()); | |
7404fe1b | 9863 | r_sym = gsym->symtab_index(); |
cf43a2fe AM |
9864 | } |
9865 | ||
9866 | // Get the new offset--the location in the output section where | |
9867 | // this relocation should be applied. | |
cf43a2fe | 9868 | if (static_cast<Address>(offset_in_output_section) != invalid_address) |
7404fe1b | 9869 | offset += offset_in_output_section; |
cf43a2fe AM |
9870 | else |
9871 | { | |
c9269dff AM |
9872 | section_offset_type sot_offset = |
9873 | convert_types<section_offset_type, Address>(offset); | |
cf43a2fe | 9874 | section_offset_type new_sot_offset = |
c9269dff AM |
9875 | output_section->output_offset(object, relinfo->data_shndx, |
9876 | sot_offset); | |
cf43a2fe | 9877 | gold_assert(new_sot_offset != -1); |
7404fe1b | 9878 | offset = new_sot_offset; |
cf43a2fe AM |
9879 | } |
9880 | ||
dd93cd0a AM |
9881 | // In an object file, r_offset is an offset within the section. |
9882 | // In an executable or dynamic object, generated by | |
9883 | // --emit-relocs, r_offset is an absolute address. | |
033bfb73 | 9884 | if (!relocatable) |
dd93cd0a | 9885 | { |
7404fe1b | 9886 | offset += view_address; |
dd93cd0a | 9887 | if (static_cast<Address>(offset_in_output_section) != invalid_address) |
7404fe1b | 9888 | offset -= offset_in_output_section; |
dd93cd0a AM |
9889 | } |
9890 | ||
cf43a2fe | 9891 | // Handle the reloc addend based on the strategy. |
cf43a2fe AM |
9892 | if (strategy == Relocatable_relocs::RELOC_COPY) |
9893 | ; | |
9894 | else if (strategy == Relocatable_relocs::RELOC_ADJUST_FOR_SECTION_RELA) | |
9895 | { | |
7404fe1b | 9896 | const Symbol_value<size>* psymval = object->local_symbol(orig_r_sym); |
033bfb73 CC |
9897 | addend = psymval->value(object, addend); |
9898 | // In a relocatable link, the symbol value is relative to | |
9899 | // the start of the output section. For a non-relocatable | |
9900 | // link, we need to adjust the addend. | |
9901 | if (!relocatable) | |
9902 | { | |
9903 | gold_assert(os != NULL); | |
9904 | addend -= os->address(); | |
9905 | } | |
cf43a2fe AM |
9906 | } |
9907 | else if (strategy == Relocatable_relocs::RELOC_SPECIAL) | |
9908 | { | |
e3a7574e AM |
9909 | if (size == 32) |
9910 | { | |
9911 | if (addend >= 32768) | |
9912 | addend += got2_addend; | |
9913 | } | |
9914 | else if (r_type == elfcpp::R_POWERPC_REL16_HA) | |
9915 | { | |
9916 | r_type = elfcpp::R_POWERPC_ADDR16_HA; | |
dcfc7dd4 | 9917 | addend -= d_offset; |
e3a7574e AM |
9918 | } |
9919 | else if (r_type == elfcpp::R_POWERPC_REL16_LO) | |
9920 | { | |
9921 | r_type = elfcpp::R_POWERPC_ADDR16_LO; | |
dcfc7dd4 | 9922 | addend -= d_offset + 4; |
e3a7574e | 9923 | } |
cf43a2fe AM |
9924 | } |
9925 | else | |
9926 | gold_unreachable(); | |
9927 | ||
033bfb73 | 9928 | if (!relocatable) |
7404fe1b AM |
9929 | { |
9930 | if (r_type == elfcpp::R_POWERPC_GOT_TLSGD16 | |
9931 | || r_type == elfcpp::R_POWERPC_GOT_TLSGD16_LO | |
9932 | || r_type == elfcpp::R_POWERPC_GOT_TLSGD16_HI | |
9933 | || r_type == elfcpp::R_POWERPC_GOT_TLSGD16_HA) | |
9934 | { | |
9935 | // First instruction of a global dynamic sequence, | |
9936 | // arg setup insn. | |
9937 | const bool final = gsym == NULL || gsym->final_value_is_known(); | |
9938 | switch (this->optimize_tls_gd(final)) | |
9939 | { | |
9940 | case tls::TLSOPT_TO_IE: | |
9941 | r_type += (elfcpp::R_POWERPC_GOT_TPREL16 | |
9942 | - elfcpp::R_POWERPC_GOT_TLSGD16); | |
9943 | break; | |
9944 | case tls::TLSOPT_TO_LE: | |
9945 | if (r_type == elfcpp::R_POWERPC_GOT_TLSGD16 | |
9946 | || r_type == elfcpp::R_POWERPC_GOT_TLSGD16_LO) | |
9947 | r_type = elfcpp::R_POWERPC_TPREL16_HA; | |
9948 | else | |
9949 | { | |
9950 | r_type = elfcpp::R_POWERPC_NONE; | |
dcfc7dd4 | 9951 | offset -= d_offset; |
7404fe1b AM |
9952 | } |
9953 | break; | |
9954 | default: | |
9955 | break; | |
9956 | } | |
9957 | } | |
9958 | else if (r_type == elfcpp::R_POWERPC_GOT_TLSLD16 | |
9959 | || r_type == elfcpp::R_POWERPC_GOT_TLSLD16_LO | |
9960 | || r_type == elfcpp::R_POWERPC_GOT_TLSLD16_HI | |
9961 | || r_type == elfcpp::R_POWERPC_GOT_TLSLD16_HA) | |
9962 | { | |
9963 | // First instruction of a local dynamic sequence, | |
9964 | // arg setup insn. | |
9965 | if (this->optimize_tls_ld() == tls::TLSOPT_TO_LE) | |
9966 | { | |
9967 | if (r_type == elfcpp::R_POWERPC_GOT_TLSLD16 | |
9968 | || r_type == elfcpp::R_POWERPC_GOT_TLSLD16_LO) | |
9969 | { | |
9970 | r_type = elfcpp::R_POWERPC_TPREL16_HA; | |
9971 | const Output_section* os = relinfo->layout->tls_segment() | |
9972 | ->first_section(); | |
9973 | gold_assert(os != NULL); | |
9974 | gold_assert(os->needs_symtab_index()); | |
9975 | r_sym = os->symtab_index(); | |
9976 | addend = dtp_offset; | |
9977 | } | |
9978 | else | |
9979 | { | |
9980 | r_type = elfcpp::R_POWERPC_NONE; | |
dcfc7dd4 | 9981 | offset -= d_offset; |
7404fe1b AM |
9982 | } |
9983 | } | |
9984 | } | |
9985 | else if (r_type == elfcpp::R_POWERPC_GOT_TPREL16 | |
9986 | || r_type == elfcpp::R_POWERPC_GOT_TPREL16_LO | |
9987 | || r_type == elfcpp::R_POWERPC_GOT_TPREL16_HI | |
9988 | || r_type == elfcpp::R_POWERPC_GOT_TPREL16_HA) | |
9989 | { | |
9990 | // First instruction of initial exec sequence. | |
9991 | const bool final = gsym == NULL || gsym->final_value_is_known(); | |
9992 | if (this->optimize_tls_ie(final) == tls::TLSOPT_TO_LE) | |
9993 | { | |
9994 | if (r_type == elfcpp::R_POWERPC_GOT_TPREL16 | |
9995 | || r_type == elfcpp::R_POWERPC_GOT_TPREL16_LO) | |
9996 | r_type = elfcpp::R_POWERPC_TPREL16_HA; | |
9997 | else | |
9998 | { | |
9999 | r_type = elfcpp::R_POWERPC_NONE; | |
dcfc7dd4 | 10000 | offset -= d_offset; |
7404fe1b AM |
10001 | } |
10002 | } | |
10003 | } | |
10004 | else if ((size == 64 && r_type == elfcpp::R_PPC64_TLSGD) | |
10005 | || (size == 32 && r_type == elfcpp::R_PPC_TLSGD)) | |
10006 | { | |
10007 | // Second instruction of a global dynamic sequence, | |
10008 | // the __tls_get_addr call | |
10009 | const bool final = gsym == NULL || gsym->final_value_is_known(); | |
10010 | switch (this->optimize_tls_gd(final)) | |
10011 | { | |
10012 | case tls::TLSOPT_TO_IE: | |
10013 | r_type = elfcpp::R_POWERPC_NONE; | |
10014 | zap_next = true; | |
10015 | break; | |
10016 | case tls::TLSOPT_TO_LE: | |
10017 | r_type = elfcpp::R_POWERPC_TPREL16_LO; | |
dcfc7dd4 | 10018 | offset += d_offset; |
7404fe1b AM |
10019 | zap_next = true; |
10020 | break; | |
10021 | default: | |
10022 | break; | |
10023 | } | |
10024 | } | |
10025 | else if ((size == 64 && r_type == elfcpp::R_PPC64_TLSLD) | |
10026 | || (size == 32 && r_type == elfcpp::R_PPC_TLSLD)) | |
10027 | { | |
10028 | // Second instruction of a local dynamic sequence, | |
10029 | // the __tls_get_addr call | |
10030 | if (this->optimize_tls_ld() == tls::TLSOPT_TO_LE) | |
10031 | { | |
10032 | const Output_section* os = relinfo->layout->tls_segment() | |
10033 | ->first_section(); | |
10034 | gold_assert(os != NULL); | |
10035 | gold_assert(os->needs_symtab_index()); | |
10036 | r_sym = os->symtab_index(); | |
10037 | addend = dtp_offset; | |
10038 | r_type = elfcpp::R_POWERPC_TPREL16_LO; | |
dcfc7dd4 | 10039 | offset += d_offset; |
7404fe1b AM |
10040 | zap_next = true; |
10041 | } | |
10042 | } | |
10043 | else if (r_type == elfcpp::R_POWERPC_TLS) | |
10044 | { | |
10045 | // Second instruction of an initial exec sequence | |
10046 | const bool final = gsym == NULL || gsym->final_value_is_known(); | |
10047 | if (this->optimize_tls_ie(final) == tls::TLSOPT_TO_LE) | |
10048 | { | |
10049 | r_type = elfcpp::R_POWERPC_TPREL16_LO; | |
dcfc7dd4 | 10050 | offset += d_offset; |
7404fe1b AM |
10051 | } |
10052 | } | |
10053 | } | |
10054 | ||
10055 | reloc_write.put_r_offset(offset); | |
10056 | reloc_write.put_r_info(elfcpp::elf_r_info<size>(r_sym, r_type)); | |
10057 | reloc_write.put_r_addend(addend); | |
cf43a2fe AM |
10058 | |
10059 | pwrite += reloc_size; | |
10060 | } | |
10061 | ||
10062 | gold_assert(static_cast<section_size_type>(pwrite - reloc_view) | |
10063 | == reloc_view_size); | |
42cacb20 DE |
10064 | } |
10065 | ||
ec661b9d | 10066 | // Return the value to use for a dynamic symbol which requires special |
42cacb20 DE |
10067 | // treatment. This is how we support equality comparisons of function |
10068 | // pointers across shared library boundaries, as described in the | |
10069 | // processor specific ABI supplement. | |
10070 | ||
10071 | template<int size, bool big_endian> | |
10072 | uint64_t | |
10073 | Target_powerpc<size, big_endian>::do_dynsym_value(const Symbol* gsym) const | |
10074 | { | |
cf43a2fe AM |
10075 | if (size == 32) |
10076 | { | |
10077 | gold_assert(gsym->is_from_dynobj() && gsym->has_plt_offset()); | |
ec661b9d AM |
10078 | for (typename Stub_tables::const_iterator p = this->stub_tables_.begin(); |
10079 | p != this->stub_tables_.end(); | |
10080 | ++p) | |
10081 | { | |
7e57d19e AM |
10082 | const typename Stub_table<size, big_endian>::Plt_stub_ent* ent |
10083 | = (*p)->find_plt_call_entry(gsym); | |
10084 | if (ent != NULL) | |
10085 | return (*p)->stub_address() + ent->off_; | |
ec661b9d | 10086 | } |
c9824451 | 10087 | } |
9055360d AM |
10088 | else if (this->abiversion() >= 2) |
10089 | { | |
faa2211d AM |
10090 | Address off = this->glink_section()->find_global_entry(gsym); |
10091 | if (off != invalid_address) | |
9055360d AM |
10092 | return this->glink_section()->global_entry_address() + off; |
10093 | } | |
ec661b9d | 10094 | gold_unreachable(); |
c9824451 AM |
10095 | } |
10096 | ||
10097 | // Return the PLT address to use for a local symbol. | |
10098 | template<int size, bool big_endian> | |
10099 | uint64_t | |
10100 | Target_powerpc<size, big_endian>::do_plt_address_for_local( | |
10101 | const Relobj* object, | |
10102 | unsigned int symndx) const | |
10103 | { | |
10104 | if (size == 32) | |
10105 | { | |
10106 | const Sized_relobj<size, big_endian>* relobj | |
10107 | = static_cast<const Sized_relobj<size, big_endian>*>(object); | |
ec661b9d AM |
10108 | for (typename Stub_tables::const_iterator p = this->stub_tables_.begin(); |
10109 | p != this->stub_tables_.end(); | |
10110 | ++p) | |
10111 | { | |
7e57d19e AM |
10112 | const typename Stub_table<size, big_endian>::Plt_stub_ent* ent |
10113 | = (*p)->find_plt_call_entry(relobj->sized_relobj(), symndx); | |
10114 | if (ent != NULL) | |
10115 | return (*p)->stub_address() + ent->off_; | |
ec661b9d | 10116 | } |
c9824451 | 10117 | } |
ec661b9d | 10118 | gold_unreachable(); |
c9824451 AM |
10119 | } |
10120 | ||
10121 | // Return the PLT address to use for a global symbol. | |
10122 | template<int size, bool big_endian> | |
10123 | uint64_t | |
10124 | Target_powerpc<size, big_endian>::do_plt_address_for_global( | |
10125 | const Symbol* gsym) const | |
10126 | { | |
10127 | if (size == 32) | |
10128 | { | |
ec661b9d AM |
10129 | for (typename Stub_tables::const_iterator p = this->stub_tables_.begin(); |
10130 | p != this->stub_tables_.end(); | |
10131 | ++p) | |
10132 | { | |
7e57d19e AM |
10133 | const typename Stub_table<size, big_endian>::Plt_stub_ent* ent |
10134 | = (*p)->find_plt_call_entry(gsym); | |
10135 | if (ent != NULL) | |
10136 | return (*p)->stub_address() + ent->off_; | |
ec661b9d | 10137 | } |
cf43a2fe | 10138 | } |
9055360d AM |
10139 | else if (this->abiversion() >= 2) |
10140 | { | |
faa2211d AM |
10141 | Address off = this->glink_section()->find_global_entry(gsym); |
10142 | if (off != invalid_address) | |
9055360d AM |
10143 | return this->glink_section()->global_entry_address() + off; |
10144 | } | |
ec661b9d | 10145 | gold_unreachable(); |
42cacb20 DE |
10146 | } |
10147 | ||
bd73a62d AM |
10148 | // Return the offset to use for the GOT_INDX'th got entry which is |
10149 | // for a local tls symbol specified by OBJECT, SYMNDX. | |
10150 | template<int size, bool big_endian> | |
10151 | int64_t | |
10152 | Target_powerpc<size, big_endian>::do_tls_offset_for_local( | |
10153 | const Relobj* object, | |
10154 | unsigned int symndx, | |
10155 | unsigned int got_indx) const | |
10156 | { | |
10157 | const Powerpc_relobj<size, big_endian>* ppc_object | |
10158 | = static_cast<const Powerpc_relobj<size, big_endian>*>(object); | |
10159 | if (ppc_object->local_symbol(symndx)->is_tls_symbol()) | |
10160 | { | |
10161 | for (Got_type got_type = GOT_TYPE_TLSGD; | |
10162 | got_type <= GOT_TYPE_TPREL; | |
10163 | got_type = Got_type(got_type + 1)) | |
10164 | if (ppc_object->local_has_got_offset(symndx, got_type)) | |
10165 | { | |
10166 | unsigned int off = ppc_object->local_got_offset(symndx, got_type); | |
10167 | if (got_type == GOT_TYPE_TLSGD) | |
10168 | off += size / 8; | |
10169 | if (off == got_indx * (size / 8)) | |
10170 | { | |
10171 | if (got_type == GOT_TYPE_TPREL) | |
10172 | return -tp_offset; | |
10173 | else | |
10174 | return -dtp_offset; | |
10175 | } | |
10176 | } | |
10177 | } | |
10178 | gold_unreachable(); | |
10179 | } | |
10180 | ||
10181 | // Return the offset to use for the GOT_INDX'th got entry which is | |
10182 | // for global tls symbol GSYM. | |
10183 | template<int size, bool big_endian> | |
10184 | int64_t | |
10185 | Target_powerpc<size, big_endian>::do_tls_offset_for_global( | |
10186 | Symbol* gsym, | |
10187 | unsigned int got_indx) const | |
10188 | { | |
10189 | if (gsym->type() == elfcpp::STT_TLS) | |
10190 | { | |
10191 | for (Got_type got_type = GOT_TYPE_TLSGD; | |
10192 | got_type <= GOT_TYPE_TPREL; | |
10193 | got_type = Got_type(got_type + 1)) | |
10194 | if (gsym->has_got_offset(got_type)) | |
10195 | { | |
10196 | unsigned int off = gsym->got_offset(got_type); | |
10197 | if (got_type == GOT_TYPE_TLSGD) | |
10198 | off += size / 8; | |
10199 | if (off == got_indx * (size / 8)) | |
10200 | { | |
10201 | if (got_type == GOT_TYPE_TPREL) | |
10202 | return -tp_offset; | |
10203 | else | |
10204 | return -dtp_offset; | |
10205 | } | |
10206 | } | |
10207 | } | |
10208 | gold_unreachable(); | |
10209 | } | |
10210 | ||
42cacb20 DE |
10211 | // The selector for powerpc object files. |
10212 | ||
10213 | template<int size, bool big_endian> | |
10214 | class Target_selector_powerpc : public Target_selector | |
10215 | { | |
10216 | public: | |
10217 | Target_selector_powerpc() | |
edc27beb AM |
10218 | : Target_selector(size == 64 ? elfcpp::EM_PPC64 : elfcpp::EM_PPC, |
10219 | size, big_endian, | |
03ef7571 ILT |
10220 | (size == 64 |
10221 | ? (big_endian ? "elf64-powerpc" : "elf64-powerpcle") | |
10222 | : (big_endian ? "elf32-powerpc" : "elf32-powerpcle")), | |
10223 | (size == 64 | |
10224 | ? (big_endian ? "elf64ppc" : "elf64lppc") | |
10225 | : (big_endian ? "elf32ppc" : "elf32lppc"))) | |
42cacb20 DE |
10226 | { } |
10227 | ||
2e702c99 RM |
10228 | virtual Target* |
10229 | do_instantiate_target() | |
7f055c20 | 10230 | { return new Target_powerpc<size, big_endian>(); } |
42cacb20 DE |
10231 | }; |
10232 | ||
10233 | Target_selector_powerpc<32, true> target_selector_ppc32; | |
10234 | Target_selector_powerpc<32, false> target_selector_ppc32le; | |
10235 | Target_selector_powerpc<64, true> target_selector_ppc64; | |
10236 | Target_selector_powerpc<64, false> target_selector_ppc64le; | |
10237 | ||
decdd3bc AM |
10238 | // Instantiate these constants for -O0 |
10239 | template<int size, bool big_endian> | |
9055360d AM |
10240 | const typename Output_data_glink<size, big_endian>::Address |
10241 | Output_data_glink<size, big_endian>::invalid_address; | |
10242 | template<int size, bool big_endian> | |
decdd3bc AM |
10243 | const typename Stub_table<size, big_endian>::Address |
10244 | Stub_table<size, big_endian>::invalid_address; | |
10245 | template<int size, bool big_endian> | |
10246 | const typename Target_powerpc<size, big_endian>::Address | |
10247 | Target_powerpc<size, big_endian>::invalid_address; | |
10248 | ||
42cacb20 | 10249 | } // End anonymous namespace. |