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42cacb20 DE |
1 | // powerpc.cc -- powerpc target support for gold. |
2 | ||
b90efa5b | 3 | // Copyright (C) 2008-2015 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 | { | |
73 | Output_section* output_section; | |
74 | const Output_section::Input_section* owner; | |
75 | }; | |
76 | ||
4d9aa155 AM |
77 | inline bool |
78 | is_branch_reloc(unsigned int r_type); | |
79 | ||
cf43a2fe AM |
80 | template<int size, bool big_endian> |
81 | class Powerpc_relobj : public Sized_relobj_file<size, big_endian> | |
82 | { | |
83 | public: | |
dd93cd0a | 84 | typedef typename elfcpp::Elf_types<size>::Elf_Addr Address; |
e81fea4d AM |
85 | typedef Unordered_set<Section_id, Section_id_hash> Section_refs; |
86 | typedef Unordered_map<Address, Section_refs> Access_from; | |
c9269dff | 87 | |
cf43a2fe AM |
88 | Powerpc_relobj(const std::string& name, Input_file* input_file, off_t offset, |
89 | const typename elfcpp::Ehdr<size, big_endian>& ehdr) | |
90 | : Sized_relobj_file<size, big_endian>(name, input_file, offset, ehdr), | |
d8f5a274 | 91 | special_(0), has_small_toc_reloc_(false), opd_valid_(false), |
a3e60ddb | 92 | opd_ent_(), access_from_map_(), has14_(), stub_table_index_(), |
b4f7960d AM |
93 | e_flags_(ehdr.get_e_flags()), st_other_() |
94 | { | |
95 | this->set_abiversion(0); | |
96 | } | |
cf43a2fe AM |
97 | |
98 | ~Powerpc_relobj() | |
99 | { } | |
100 | ||
b4f7960d AM |
101 | // Read the symbols then set up st_other vector. |
102 | void | |
103 | do_read_symbols(Read_symbols_data*); | |
104 | ||
c9269dff | 105 | // The .got2 section shndx. |
cf43a2fe AM |
106 | unsigned int |
107 | got2_shndx() const | |
108 | { | |
109 | if (size == 32) | |
c9269dff | 110 | return this->special_; |
cf43a2fe AM |
111 | else |
112 | return 0; | |
113 | } | |
114 | ||
c9269dff AM |
115 | // The .opd section shndx. |
116 | unsigned int | |
117 | opd_shndx() const | |
118 | { | |
119 | if (size == 32) | |
120 | return 0; | |
121 | else | |
122 | return this->special_; | |
123 | } | |
124 | ||
125 | // Init OPD entry arrays. | |
126 | void | |
127 | init_opd(size_t opd_size) | |
128 | { | |
129 | size_t count = this->opd_ent_ndx(opd_size); | |
bfdfa4cd | 130 | this->opd_ent_.resize(count); |
c9269dff AM |
131 | } |
132 | ||
133 | // Return section and offset of function entry for .opd + R_OFF. | |
e81fea4d AM |
134 | unsigned int |
135 | get_opd_ent(Address r_off, Address* value = NULL) const | |
c9269dff AM |
136 | { |
137 | size_t ndx = this->opd_ent_ndx(r_off); | |
bfdfa4cd AM |
138 | gold_assert(ndx < this->opd_ent_.size()); |
139 | gold_assert(this->opd_ent_[ndx].shndx != 0); | |
e81fea4d | 140 | if (value != NULL) |
bfdfa4cd AM |
141 | *value = this->opd_ent_[ndx].off; |
142 | return this->opd_ent_[ndx].shndx; | |
c9269dff AM |
143 | } |
144 | ||
145 | // Set section and offset of function entry for .opd + R_OFF. | |
146 | void | |
dd93cd0a | 147 | set_opd_ent(Address r_off, unsigned int shndx, Address value) |
c9269dff AM |
148 | { |
149 | size_t ndx = this->opd_ent_ndx(r_off); | |
bfdfa4cd AM |
150 | gold_assert(ndx < this->opd_ent_.size()); |
151 | this->opd_ent_[ndx].shndx = shndx; | |
152 | this->opd_ent_[ndx].off = value; | |
153 | } | |
154 | ||
155 | // Return discard flag for .opd + R_OFF. | |
156 | bool | |
157 | get_opd_discard(Address r_off) const | |
158 | { | |
159 | size_t ndx = this->opd_ent_ndx(r_off); | |
160 | gold_assert(ndx < this->opd_ent_.size()); | |
161 | return this->opd_ent_[ndx].discard; | |
162 | } | |
163 | ||
164 | // Set discard flag for .opd + R_OFF. | |
165 | void | |
166 | set_opd_discard(Address r_off) | |
167 | { | |
168 | size_t ndx = this->opd_ent_ndx(r_off); | |
169 | gold_assert(ndx < this->opd_ent_.size()); | |
170 | this->opd_ent_[ndx].discard = true; | |
c9269dff AM |
171 | } |
172 | ||
e81fea4d AM |
173 | bool |
174 | opd_valid() const | |
175 | { return this->opd_valid_; } | |
176 | ||
177 | void | |
178 | set_opd_valid() | |
179 | { this->opd_valid_ = true; } | |
180 | ||
c9269dff AM |
181 | // Examine .rela.opd to build info about function entry points. |
182 | void | |
183 | scan_opd_relocs(size_t reloc_count, | |
184 | const unsigned char* prelocs, | |
185 | const unsigned char* plocal_syms); | |
186 | ||
26a4e9cb AM |
187 | // Perform the Sized_relobj_file method, then set up opd info from |
188 | // .opd relocs. | |
c9269dff AM |
189 | void |
190 | do_read_relocs(Read_relocs_data*); | |
191 | ||
cf43a2fe AM |
192 | bool |
193 | do_find_special_sections(Read_symbols_data* sd); | |
194 | ||
ec4dbad3 AM |
195 | // Adjust this local symbol value. Return false if the symbol |
196 | // should be discarded from the output file. | |
197 | bool | |
198 | do_adjust_local_symbol(Symbol_value<size>* lv) const | |
199 | { | |
200 | if (size == 64 && this->opd_shndx() != 0) | |
201 | { | |
202 | bool is_ordinary; | |
203 | if (lv->input_shndx(&is_ordinary) != this->opd_shndx()) | |
204 | return true; | |
205 | if (this->get_opd_discard(lv->input_value())) | |
206 | return false; | |
207 | } | |
208 | return true; | |
209 | } | |
210 | ||
6c77229c AM |
211 | Access_from* |
212 | access_from_map() | |
213 | { return &this->access_from_map_; } | |
214 | ||
215 | // Add a reference from SRC_OBJ, SRC_INDX to this object's .opd | |
216 | // section at DST_OFF. | |
217 | void | |
efc6fa12 | 218 | add_reference(Relobj* src_obj, |
6c77229c AM |
219 | unsigned int src_indx, |
220 | typename elfcpp::Elf_types<size>::Elf_Addr dst_off) | |
221 | { | |
222 | Section_id src_id(src_obj, src_indx); | |
223 | this->access_from_map_[dst_off].insert(src_id); | |
224 | } | |
225 | ||
226 | // Add a reference to the code section specified by the .opd entry | |
227 | // at DST_OFF | |
228 | void | |
229 | add_gc_mark(typename elfcpp::Elf_types<size>::Elf_Addr dst_off) | |
230 | { | |
231 | size_t ndx = this->opd_ent_ndx(dst_off); | |
232 | if (ndx >= this->opd_ent_.size()) | |
233 | this->opd_ent_.resize(ndx + 1); | |
234 | this->opd_ent_[ndx].gc_mark = true; | |
235 | } | |
236 | ||
237 | void | |
238 | process_gc_mark(Symbol_table* symtab) | |
239 | { | |
240 | for (size_t i = 0; i < this->opd_ent_.size(); i++) | |
241 | if (this->opd_ent_[i].gc_mark) | |
242 | { | |
243 | unsigned int shndx = this->opd_ent_[i].shndx; | |
4277535c | 244 | symtab->gc()->worklist().push_back(Section_id(this, shndx)); |
6c77229c AM |
245 | } |
246 | } | |
247 | ||
dd93cd0a AM |
248 | // Return offset in output GOT section that this object will use |
249 | // as a TOC pointer. Won't be just a constant with multi-toc support. | |
250 | Address | |
251 | toc_base_offset() const | |
252 | { return 0x8000; } | |
253 | ||
d8f5a274 AM |
254 | void |
255 | set_has_small_toc_reloc() | |
256 | { has_small_toc_reloc_ = true; } | |
257 | ||
258 | bool | |
259 | has_small_toc_reloc() const | |
260 | { return has_small_toc_reloc_; } | |
261 | ||
ec661b9d AM |
262 | void |
263 | set_has_14bit_branch(unsigned int shndx) | |
264 | { | |
265 | if (shndx >= this->has14_.size()) | |
266 | this->has14_.resize(shndx + 1); | |
267 | this->has14_[shndx] = true; | |
268 | } | |
269 | ||
270 | bool | |
271 | has_14bit_branch(unsigned int shndx) const | |
272 | { return shndx < this->has14_.size() && this->has14_[shndx]; } | |
273 | ||
274 | void | |
a3e60ddb | 275 | set_stub_table(unsigned int shndx, unsigned int stub_index) |
ec661b9d | 276 | { |
a3e60ddb AM |
277 | if (shndx >= this->stub_table_index_.size()) |
278 | this->stub_table_index_.resize(shndx + 1); | |
279 | this->stub_table_index_[shndx] = stub_index; | |
ec661b9d AM |
280 | } |
281 | ||
282 | Stub_table<size, big_endian>* | |
283 | stub_table(unsigned int shndx) | |
284 | { | |
a3e60ddb AM |
285 | if (shndx < this->stub_table_index_.size()) |
286 | { | |
287 | Target_powerpc<size, big_endian>* target | |
288 | = static_cast<Target_powerpc<size, big_endian>*>( | |
289 | parameters->sized_target<size, big_endian>()); | |
290 | unsigned int indx = this->stub_table_index_[shndx]; | |
291 | gold_assert(indx < target->stub_tables().size()); | |
292 | return target->stub_tables()[indx]; | |
293 | } | |
ec661b9d AM |
294 | return NULL; |
295 | } | |
296 | ||
a3e60ddb AM |
297 | void |
298 | clear_stub_table() | |
299 | { | |
300 | this->stub_table_index_.clear(); | |
301 | } | |
302 | ||
b4f7960d AM |
303 | int |
304 | abiversion() const | |
305 | { return this->e_flags_ & elfcpp::EF_PPC64_ABI; } | |
306 | ||
307 | // Set ABI version for input and output | |
308 | void | |
309 | set_abiversion(int ver); | |
310 | ||
311 | unsigned int | |
312 | ppc64_local_entry_offset(const Symbol* sym) const | |
313 | { return elfcpp::ppc64_decode_local_entry(sym->nonvis() >> 3); } | |
314 | ||
315 | unsigned int | |
316 | ppc64_local_entry_offset(unsigned int symndx) const | |
317 | { return elfcpp::ppc64_decode_local_entry(this->st_other_[symndx] >> 5); } | |
318 | ||
cf43a2fe | 319 | private: |
bfdfa4cd AM |
320 | struct Opd_ent |
321 | { | |
322 | unsigned int shndx; | |
c6de8ed4 AM |
323 | bool discard : 1; |
324 | bool gc_mark : 1; | |
26a4e9cb | 325 | Address off; |
bfdfa4cd AM |
326 | }; |
327 | ||
328 | // Return index into opd_ent_ array for .opd entry at OFF. | |
329 | // .opd entries are 24 bytes long, but they can be spaced 16 bytes | |
330 | // apart when the language doesn't use the last 8-byte word, the | |
331 | // environment pointer. Thus dividing the entry section offset by | |
332 | // 16 will give an index into opd_ent_ that works for either layout | |
333 | // of .opd. (It leaves some elements of the vector unused when .opd | |
334 | // entries are spaced 24 bytes apart, but we don't know the spacing | |
335 | // until relocations are processed, and in any case it is possible | |
336 | // for an object to have some entries spaced 16 bytes apart and | |
337 | // others 24 bytes apart.) | |
c9269dff AM |
338 | size_t |
339 | opd_ent_ndx(size_t off) const | |
340 | { return off >> 4;} | |
341 | ||
342 | // For 32-bit the .got2 section shdnx, for 64-bit the .opd section shndx. | |
343 | unsigned int special_; | |
bfdfa4cd | 344 | |
d8f5a274 AM |
345 | // For 64-bit, whether this object uses small model relocs to access |
346 | // the toc. | |
347 | bool has_small_toc_reloc_; | |
348 | ||
bfdfa4cd AM |
349 | // Set at the start of gc_process_relocs, when we know opd_ent_ |
350 | // vector is valid. The flag could be made atomic and set in | |
351 | // do_read_relocs with memory_order_release and then tested with | |
352 | // memory_order_acquire, potentially resulting in fewer entries in | |
353 | // access_from_map_. | |
354 | bool opd_valid_; | |
355 | ||
c9269dff AM |
356 | // The first 8-byte word of an OPD entry gives the address of the |
357 | // entry point of the function. Relocatable object files have a | |
bfdfa4cd | 358 | // relocation on this word. The following vector records the |
c9269dff | 359 | // section and offset specified by these relocations. |
bfdfa4cd AM |
360 | std::vector<Opd_ent> opd_ent_; |
361 | ||
e81fea4d | 362 | // References made to this object's .opd section when running |
bfdfa4cd AM |
363 | // gc_process_relocs for another object, before the opd_ent_ vector |
364 | // is valid for this object. | |
e81fea4d | 365 | Access_from access_from_map_; |
ec661b9d AM |
366 | |
367 | // Whether input section has a 14-bit branch reloc. | |
368 | std::vector<bool> has14_; | |
369 | ||
370 | // The stub table to use for a given input section. | |
a3e60ddb | 371 | std::vector<unsigned int> stub_table_index_; |
b4f7960d AM |
372 | |
373 | // Header e_flags | |
374 | elfcpp::Elf_Word e_flags_; | |
375 | ||
376 | // ELF st_other field for local symbols. | |
377 | std::vector<unsigned char> st_other_; | |
cf43a2fe AM |
378 | }; |
379 | ||
dc3714f3 AM |
380 | template<int size, bool big_endian> |
381 | class Powerpc_dynobj : public Sized_dynobj<size, big_endian> | |
382 | { | |
383 | public: | |
384 | typedef typename elfcpp::Elf_types<size>::Elf_Addr Address; | |
385 | ||
386 | Powerpc_dynobj(const std::string& name, Input_file* input_file, off_t offset, | |
387 | const typename elfcpp::Ehdr<size, big_endian>& ehdr) | |
388 | : Sized_dynobj<size, big_endian>(name, input_file, offset, ehdr), | |
b4f7960d AM |
389 | opd_shndx_(0), opd_ent_(), e_flags_(ehdr.get_e_flags()) |
390 | { | |
391 | this->set_abiversion(0); | |
392 | } | |
dc3714f3 AM |
393 | |
394 | ~Powerpc_dynobj() | |
395 | { } | |
396 | ||
397 | // Call Sized_dynobj::do_read_symbols to read the symbols then | |
398 | // read .opd from a dynamic object, filling in opd_ent_ vector, | |
399 | void | |
400 | do_read_symbols(Read_symbols_data*); | |
401 | ||
402 | // The .opd section shndx. | |
403 | unsigned int | |
404 | opd_shndx() const | |
405 | { | |
406 | return this->opd_shndx_; | |
407 | } | |
408 | ||
409 | // The .opd section address. | |
410 | Address | |
411 | opd_address() const | |
412 | { | |
413 | return this->opd_address_; | |
414 | } | |
415 | ||
416 | // Init OPD entry arrays. | |
417 | void | |
418 | init_opd(size_t opd_size) | |
419 | { | |
420 | size_t count = this->opd_ent_ndx(opd_size); | |
421 | this->opd_ent_.resize(count); | |
422 | } | |
423 | ||
424 | // Return section and offset of function entry for .opd + R_OFF. | |
425 | unsigned int | |
426 | get_opd_ent(Address r_off, Address* value = NULL) const | |
427 | { | |
428 | size_t ndx = this->opd_ent_ndx(r_off); | |
429 | gold_assert(ndx < this->opd_ent_.size()); | |
430 | gold_assert(this->opd_ent_[ndx].shndx != 0); | |
431 | if (value != NULL) | |
432 | *value = this->opd_ent_[ndx].off; | |
433 | return this->opd_ent_[ndx].shndx; | |
434 | } | |
435 | ||
436 | // Set section and offset of function entry for .opd + R_OFF. | |
437 | void | |
438 | set_opd_ent(Address r_off, unsigned int shndx, Address value) | |
439 | { | |
440 | size_t ndx = this->opd_ent_ndx(r_off); | |
441 | gold_assert(ndx < this->opd_ent_.size()); | |
442 | this->opd_ent_[ndx].shndx = shndx; | |
443 | this->opd_ent_[ndx].off = value; | |
444 | } | |
445 | ||
b4f7960d AM |
446 | int |
447 | abiversion() const | |
448 | { return this->e_flags_ & elfcpp::EF_PPC64_ABI; } | |
449 | ||
450 | // Set ABI version for input and output. | |
451 | void | |
452 | set_abiversion(int ver); | |
453 | ||
dc3714f3 AM |
454 | private: |
455 | // Used to specify extent of executable sections. | |
456 | struct Sec_info | |
457 | { | |
458 | Sec_info(Address start_, Address len_, unsigned int shndx_) | |
459 | : start(start_), len(len_), shndx(shndx_) | |
460 | { } | |
461 | ||
462 | bool | |
463 | operator<(const Sec_info& that) const | |
464 | { return this->start < that.start; } | |
465 | ||
466 | Address start; | |
467 | Address len; | |
468 | unsigned int shndx; | |
469 | }; | |
470 | ||
471 | struct Opd_ent | |
472 | { | |
473 | unsigned int shndx; | |
474 | Address off; | |
475 | }; | |
476 | ||
477 | // Return index into opd_ent_ array for .opd entry at OFF. | |
478 | size_t | |
479 | opd_ent_ndx(size_t off) const | |
480 | { return off >> 4;} | |
481 | ||
482 | // For 64-bit the .opd section shndx and address. | |
483 | unsigned int opd_shndx_; | |
484 | Address opd_address_; | |
485 | ||
486 | // The first 8-byte word of an OPD entry gives the address of the | |
487 | // entry point of the function. Records the section and offset | |
488 | // corresponding to the address. Note that in dynamic objects, | |
489 | // offset is *not* relative to the section. | |
490 | std::vector<Opd_ent> opd_ent_; | |
b4f7960d AM |
491 | |
492 | // Header e_flags | |
493 | elfcpp::Elf_Word e_flags_; | |
dc3714f3 AM |
494 | }; |
495 | ||
42cacb20 DE |
496 | template<int size, bool big_endian> |
497 | class Target_powerpc : public Sized_target<size, big_endian> | |
498 | { | |
499 | public: | |
d83ce4e3 AM |
500 | typedef |
501 | Output_data_reloc<elfcpp::SHT_RELA, true, size, big_endian> Reloc_section; | |
c9269dff | 502 | typedef typename elfcpp::Elf_types<size>::Elf_Addr Address; |
dd93cd0a | 503 | typedef typename elfcpp::Elf_types<size>::Elf_Swxword Signed_address; |
c9269dff | 504 | static const Address invalid_address = static_cast<Address>(0) - 1; |
dd93cd0a AM |
505 | // Offset of tp and dtp pointers from start of TLS block. |
506 | static const Address tp_offset = 0x7000; | |
507 | static const Address dtp_offset = 0x8000; | |
42cacb20 DE |
508 | |
509 | Target_powerpc() | |
510 | : Sized_target<size, big_endian>(&powerpc_info), | |
ec661b9d AM |
511 | got_(NULL), plt_(NULL), iplt_(NULL), brlt_section_(NULL), |
512 | glink_(NULL), rela_dyn_(NULL), copy_relocs_(elfcpp::R_POWERPC_COPY), | |
43819297 | 513 | tlsld_got_offset_(-1U), |
9e69ed50 | 514 | stub_tables_(), branch_lookup_table_(), branch_info_(), |
a3e60ddb | 515 | plt_thread_safe_(false), relax_failed_(false), relax_fail_count_(0), |
d49044c7 | 516 | stub_group_size_(0), savres_section_(0) |
42cacb20 DE |
517 | { |
518 | } | |
519 | ||
2e702c99 | 520 | // Process the relocations to determine unreferenced sections for |
6d03d481 ST |
521 | // garbage collection. |
522 | void | |
ad0f2072 | 523 | gc_process_relocs(Symbol_table* symtab, |
2e702c99 RM |
524 | Layout* layout, |
525 | Sized_relobj_file<size, big_endian>* object, | |
526 | unsigned int data_shndx, | |
527 | unsigned int sh_type, | |
528 | const unsigned char* prelocs, | |
529 | size_t reloc_count, | |
530 | Output_section* output_section, | |
531 | bool needs_special_offset_handling, | |
532 | size_t local_symbol_count, | |
533 | const unsigned char* plocal_symbols); | |
6d03d481 | 534 | |
42cacb20 DE |
535 | // Scan the relocations to look for symbol adjustments. |
536 | void | |
ad0f2072 | 537 | scan_relocs(Symbol_table* symtab, |
42cacb20 | 538 | Layout* layout, |
6fa2a40b | 539 | Sized_relobj_file<size, big_endian>* object, |
42cacb20 DE |
540 | unsigned int data_shndx, |
541 | unsigned int sh_type, | |
542 | const unsigned char* prelocs, | |
543 | size_t reloc_count, | |
544 | Output_section* output_section, | |
545 | bool needs_special_offset_handling, | |
546 | size_t local_symbol_count, | |
547 | const unsigned char* plocal_symbols); | |
921b5322 AM |
548 | |
549 | // Map input .toc section to output .got section. | |
550 | const char* | |
551 | do_output_section_name(const Relobj*, const char* name, size_t* plen) const | |
552 | { | |
553 | if (size == 64 && strcmp(name, ".toc") == 0) | |
554 | { | |
555 | *plen = 4; | |
556 | return ".got"; | |
557 | } | |
558 | return NULL; | |
559 | } | |
560 | ||
f3a0ed29 AM |
561 | // Provide linker defined save/restore functions. |
562 | void | |
563 | define_save_restore_funcs(Layout*, Symbol_table*); | |
564 | ||
ec661b9d AM |
565 | // No stubs unless a final link. |
566 | bool | |
567 | do_may_relax() const | |
568 | { return !parameters->options().relocatable(); } | |
569 | ||
570 | bool | |
571 | do_relax(int, const Input_objects*, Symbol_table*, Layout*, const Task*); | |
572 | ||
9d5781f8 AM |
573 | void |
574 | do_plt_fde_location(const Output_data*, unsigned char*, | |
575 | uint64_t*, off_t*) const; | |
576 | ||
ec661b9d AM |
577 | // Stash info about branches, for stub generation. |
578 | void | |
579 | push_branch(Powerpc_relobj<size, big_endian>* ppc_object, | |
580 | unsigned int data_shndx, Address r_offset, | |
581 | unsigned int r_type, unsigned int r_sym, Address addend) | |
582 | { | |
583 | Branch_info info(ppc_object, data_shndx, r_offset, r_type, r_sym, addend); | |
584 | this->branch_info_.push_back(info); | |
585 | if (r_type == elfcpp::R_POWERPC_REL14 | |
586 | || r_type == elfcpp::R_POWERPC_REL14_BRTAKEN | |
587 | || r_type == elfcpp::R_POWERPC_REL14_BRNTAKEN) | |
588 | ppc_object->set_has_14bit_branch(data_shndx); | |
589 | } | |
590 | ||
f43ba157 AM |
591 | void |
592 | do_define_standard_symbols(Symbol_table*, Layout*); | |
593 | ||
42cacb20 DE |
594 | // Finalize the sections. |
595 | void | |
f59f41f3 | 596 | do_finalize_sections(Layout*, const Input_objects*, Symbol_table*); |
42cacb20 DE |
597 | |
598 | // Return the value to use for a dynamic which requires special | |
599 | // treatment. | |
600 | uint64_t | |
601 | do_dynsym_value(const Symbol*) const; | |
602 | ||
c9824451 AM |
603 | // Return the PLT address to use for a local symbol. |
604 | uint64_t | |
605 | do_plt_address_for_local(const Relobj*, unsigned int) const; | |
606 | ||
607 | // Return the PLT address to use for a global symbol. | |
608 | uint64_t | |
609 | do_plt_address_for_global(const Symbol*) const; | |
610 | ||
bd73a62d AM |
611 | // Return the offset to use for the GOT_INDX'th got entry which is |
612 | // for a local tls symbol specified by OBJECT, SYMNDX. | |
613 | int64_t | |
614 | do_tls_offset_for_local(const Relobj* object, | |
615 | unsigned int symndx, | |
616 | unsigned int got_indx) const; | |
617 | ||
618 | // Return the offset to use for the GOT_INDX'th got entry which is | |
619 | // for global tls symbol GSYM. | |
620 | int64_t | |
621 | do_tls_offset_for_global(Symbol* gsym, unsigned int got_indx) const; | |
622 | ||
dc3714f3 AM |
623 | void |
624 | do_function_location(Symbol_location*) const; | |
625 | ||
4d9aa155 AM |
626 | bool |
627 | do_can_check_for_function_pointers() const | |
628 | { return true; } | |
629 | ||
bbec1a5d AM |
630 | // Adjust -fsplit-stack code which calls non-split-stack code. |
631 | void | |
632 | do_calls_non_split(Relobj* object, unsigned int shndx, | |
633 | section_offset_type fnoffset, section_size_type fnsize, | |
634 | unsigned char* view, section_size_type view_size, | |
635 | std::string* from, std::string* to) const; | |
636 | ||
42cacb20 DE |
637 | // Relocate a section. |
638 | void | |
639 | relocate_section(const Relocate_info<size, big_endian>*, | |
640 | unsigned int sh_type, | |
641 | const unsigned char* prelocs, | |
642 | size_t reloc_count, | |
643 | Output_section* output_section, | |
644 | bool needs_special_offset_handling, | |
645 | unsigned char* view, | |
c9269dff | 646 | Address view_address, |
364c7fa5 ILT |
647 | section_size_type view_size, |
648 | const Reloc_symbol_changes*); | |
42cacb20 DE |
649 | |
650 | // Scan the relocs during a relocatable link. | |
651 | void | |
ad0f2072 | 652 | scan_relocatable_relocs(Symbol_table* symtab, |
42cacb20 | 653 | Layout* layout, |
6fa2a40b | 654 | Sized_relobj_file<size, big_endian>* object, |
42cacb20 DE |
655 | unsigned int data_shndx, |
656 | unsigned int sh_type, | |
657 | const unsigned char* prelocs, | |
658 | size_t reloc_count, | |
659 | Output_section* output_section, | |
660 | bool needs_special_offset_handling, | |
661 | size_t local_symbol_count, | |
662 | const unsigned char* plocal_symbols, | |
663 | Relocatable_relocs*); | |
664 | ||
7404fe1b | 665 | // Emit relocations for a section. |
42cacb20 | 666 | void |
7404fe1b AM |
667 | relocate_relocs(const Relocate_info<size, big_endian>*, |
668 | unsigned int sh_type, | |
669 | const unsigned char* prelocs, | |
670 | size_t reloc_count, | |
671 | Output_section* output_section, | |
62fe925a RM |
672 | typename elfcpp::Elf_types<size>::Elf_Off |
673 | offset_in_output_section, | |
7404fe1b AM |
674 | const Relocatable_relocs*, |
675 | unsigned char*, | |
676 | Address view_address, | |
677 | section_size_type, | |
678 | unsigned char* reloc_view, | |
679 | section_size_type reloc_view_size); | |
42cacb20 DE |
680 | |
681 | // Return whether SYM is defined by the ABI. | |
682 | bool | |
9c2d0ef9 | 683 | do_is_defined_by_abi(const Symbol* sym) const |
42cacb20 | 684 | { |
cf43a2fe | 685 | return strcmp(sym->name(), "__tls_get_addr") == 0; |
42cacb20 DE |
686 | } |
687 | ||
688 | // Return the size of the GOT section. | |
689 | section_size_type | |
0e70b911 | 690 | got_size() const |
42cacb20 DE |
691 | { |
692 | gold_assert(this->got_ != NULL); | |
693 | return this->got_->data_size(); | |
694 | } | |
695 | ||
cf43a2fe AM |
696 | // Get the PLT section. |
697 | const Output_data_plt_powerpc<size, big_endian>* | |
698 | plt_section() const | |
699 | { | |
700 | gold_assert(this->plt_ != NULL); | |
701 | return this->plt_; | |
702 | } | |
703 | ||
e5d5f5ed AM |
704 | // Get the IPLT section. |
705 | const Output_data_plt_powerpc<size, big_endian>* | |
706 | iplt_section() const | |
707 | { | |
708 | gold_assert(this->iplt_ != NULL); | |
709 | return this->iplt_; | |
710 | } | |
711 | ||
cf43a2fe AM |
712 | // Get the .glink section. |
713 | const Output_data_glink<size, big_endian>* | |
714 | glink_section() const | |
715 | { | |
716 | gold_assert(this->glink_ != NULL); | |
717 | return this->glink_; | |
718 | } | |
719 | ||
9055360d AM |
720 | Output_data_glink<size, big_endian>* |
721 | glink_section() | |
722 | { | |
723 | gold_assert(this->glink_ != NULL); | |
724 | return this->glink_; | |
725 | } | |
726 | ||
9d5781f8 AM |
727 | bool has_glink() const |
728 | { return this->glink_ != NULL; } | |
729 | ||
cf43a2fe AM |
730 | // Get the GOT section. |
731 | const Output_data_got_powerpc<size, big_endian>* | |
732 | got_section() const | |
733 | { | |
734 | gold_assert(this->got_ != NULL); | |
735 | return this->got_; | |
736 | } | |
737 | ||
26a4e9cb AM |
738 | // Get the GOT section, creating it if necessary. |
739 | Output_data_got_powerpc<size, big_endian>* | |
740 | got_section(Symbol_table*, Layout*); | |
741 | ||
cf43a2fe AM |
742 | Object* |
743 | do_make_elf_object(const std::string&, Input_file*, off_t, | |
744 | const elfcpp::Ehdr<size, big_endian>&); | |
745 | ||
0e70b911 CC |
746 | // Return the number of entries in the GOT. |
747 | unsigned int | |
748 | got_entry_count() const | |
749 | { | |
750 | if (this->got_ == NULL) | |
751 | return 0; | |
752 | return this->got_size() / (size / 8); | |
753 | } | |
754 | ||
755 | // Return the number of entries in the PLT. | |
756 | unsigned int | |
757 | plt_entry_count() const; | |
758 | ||
759 | // Return the offset of the first non-reserved PLT entry. | |
760 | unsigned int | |
b4f7960d AM |
761 | first_plt_entry_offset() const |
762 | { | |
763 | if (size == 32) | |
764 | return 0; | |
765 | if (this->abiversion() >= 2) | |
766 | return 16; | |
767 | return 24; | |
768 | } | |
0e70b911 CC |
769 | |
770 | // Return the size of each PLT entry. | |
771 | unsigned int | |
b4f7960d AM |
772 | plt_entry_size() const |
773 | { | |
774 | if (size == 32) | |
775 | return 4; | |
776 | if (this->abiversion() >= 2) | |
777 | return 8; | |
778 | return 24; | |
779 | } | |
0e70b911 | 780 | |
d49044c7 AM |
781 | Output_data_save_res<size, big_endian>* |
782 | savres_section() const | |
783 | { | |
784 | return this->savres_section_; | |
785 | } | |
786 | ||
e81fea4d AM |
787 | // Add any special sections for this symbol to the gc work list. |
788 | // For powerpc64, this adds the code section of a function | |
789 | // descriptor. | |
790 | void | |
791 | do_gc_mark_symbol(Symbol_table* symtab, Symbol* sym) const; | |
792 | ||
793 | // Handle target specific gc actions when adding a gc reference from | |
794 | // SRC_OBJ, SRC_SHNDX to a location specified by DST_OBJ, DST_SHNDX | |
795 | // and DST_OFF. For powerpc64, this adds a referenc to the code | |
796 | // section of a function descriptor. | |
797 | void | |
798 | do_gc_add_reference(Symbol_table* symtab, | |
efc6fa12 | 799 | Relobj* src_obj, |
e81fea4d | 800 | unsigned int src_shndx, |
efc6fa12 | 801 | Relobj* dst_obj, |
e81fea4d AM |
802 | unsigned int dst_shndx, |
803 | Address dst_off) const; | |
804 | ||
ec661b9d AM |
805 | typedef std::vector<Stub_table<size, big_endian>*> Stub_tables; |
806 | const Stub_tables& | |
807 | stub_tables() const | |
808 | { return this->stub_tables_; } | |
809 | ||
810 | const Output_data_brlt_powerpc<size, big_endian>* | |
811 | brlt_section() const | |
812 | { return this->brlt_section_; } | |
813 | ||
814 | void | |
815 | add_branch_lookup_table(Address to) | |
816 | { | |
817 | unsigned int off = this->branch_lookup_table_.size() * (size / 8); | |
818 | this->branch_lookup_table_.insert(std::make_pair(to, off)); | |
819 | } | |
820 | ||
821 | Address | |
822 | find_branch_lookup_table(Address to) | |
823 | { | |
824 | typename Branch_lookup_table::const_iterator p | |
825 | = this->branch_lookup_table_.find(to); | |
826 | return p == this->branch_lookup_table_.end() ? invalid_address : p->second; | |
827 | } | |
828 | ||
829 | void | |
830 | write_branch_lookup_table(unsigned char *oview) | |
831 | { | |
832 | for (typename Branch_lookup_table::const_iterator p | |
833 | = this->branch_lookup_table_.begin(); | |
834 | p != this->branch_lookup_table_.end(); | |
835 | ++p) | |
836 | { | |
4d5effb9 | 837 | elfcpp::Swap<size, big_endian>::writeval(oview + p->second, p->first); |
ec661b9d AM |
838 | } |
839 | } | |
840 | ||
9e69ed50 AM |
841 | bool |
842 | plt_thread_safe() const | |
843 | { return this->plt_thread_safe_; } | |
844 | ||
b4f7960d AM |
845 | int |
846 | abiversion () const | |
847 | { return this->processor_specific_flags() & elfcpp::EF_PPC64_ABI; } | |
848 | ||
849 | void | |
850 | set_abiversion (int ver) | |
851 | { | |
852 | elfcpp::Elf_Word flags = this->processor_specific_flags(); | |
853 | flags &= ~elfcpp::EF_PPC64_ABI; | |
854 | flags |= ver & elfcpp::EF_PPC64_ABI; | |
855 | this->set_processor_specific_flags(flags); | |
856 | } | |
857 | ||
858 | // Offset to to save stack slot | |
859 | int | |
860 | stk_toc () const | |
861 | { return this->abiversion() < 2 ? 40 : 24; } | |
862 | ||
42cacb20 DE |
863 | private: |
864 | ||
e3deeb9c AM |
865 | class Track_tls |
866 | { | |
867 | public: | |
868 | enum Tls_get_addr | |
869 | { | |
870 | NOT_EXPECTED = 0, | |
871 | EXPECTED = 1, | |
872 | SKIP = 2, | |
873 | NORMAL = 3 | |
874 | }; | |
875 | ||
876 | Track_tls() | |
877 | : tls_get_addr_(NOT_EXPECTED), | |
878 | relinfo_(NULL), relnum_(0), r_offset_(0) | |
879 | { } | |
880 | ||
881 | ~Track_tls() | |
882 | { | |
883 | if (this->tls_get_addr_ != NOT_EXPECTED) | |
884 | this->missing(); | |
885 | } | |
886 | ||
887 | void | |
888 | missing(void) | |
889 | { | |
890 | if (this->relinfo_ != NULL) | |
891 | gold_error_at_location(this->relinfo_, this->relnum_, this->r_offset_, | |
892 | _("missing expected __tls_get_addr call")); | |
893 | } | |
894 | ||
895 | void | |
896 | expect_tls_get_addr_call( | |
897 | const Relocate_info<size, big_endian>* relinfo, | |
898 | size_t relnum, | |
899 | Address r_offset) | |
900 | { | |
901 | this->tls_get_addr_ = EXPECTED; | |
902 | this->relinfo_ = relinfo; | |
903 | this->relnum_ = relnum; | |
904 | this->r_offset_ = r_offset; | |
905 | } | |
906 | ||
907 | void | |
908 | expect_tls_get_addr_call() | |
909 | { this->tls_get_addr_ = EXPECTED; } | |
910 | ||
911 | void | |
912 | skip_next_tls_get_addr_call() | |
913 | {this->tls_get_addr_ = SKIP; } | |
914 | ||
915 | Tls_get_addr | |
916 | maybe_skip_tls_get_addr_call(unsigned int r_type, const Symbol* gsym) | |
917 | { | |
918 | bool is_tls_call = ((r_type == elfcpp::R_POWERPC_REL24 | |
919 | || r_type == elfcpp::R_PPC_PLTREL24) | |
920 | && gsym != NULL | |
921 | && strcmp(gsym->name(), "__tls_get_addr") == 0); | |
922 | Tls_get_addr last_tls = this->tls_get_addr_; | |
923 | this->tls_get_addr_ = NOT_EXPECTED; | |
924 | if (is_tls_call && last_tls != EXPECTED) | |
925 | return last_tls; | |
926 | else if (!is_tls_call && last_tls != NOT_EXPECTED) | |
927 | { | |
928 | this->missing(); | |
929 | return EXPECTED; | |
930 | } | |
931 | return NORMAL; | |
932 | } | |
933 | ||
934 | private: | |
935 | // What we're up to regarding calls to __tls_get_addr. | |
936 | // On powerpc, the branch and link insn making a call to | |
937 | // __tls_get_addr is marked with a relocation, R_PPC64_TLSGD, | |
938 | // R_PPC64_TLSLD, R_PPC_TLSGD or R_PPC_TLSLD, in addition to the | |
939 | // usual R_POWERPC_REL24 or R_PPC_PLTREL25 relocation on a call. | |
940 | // The marker relocation always comes first, and has the same | |
941 | // symbol as the reloc on the insn setting up the __tls_get_addr | |
942 | // argument. This ties the arg setup insn with the call insn, | |
943 | // allowing ld to safely optimize away the call. We check that | |
944 | // every call to __tls_get_addr has a marker relocation, and that | |
945 | // every marker relocation is on a call to __tls_get_addr. | |
946 | Tls_get_addr tls_get_addr_; | |
947 | // Info about the last reloc for error message. | |
948 | const Relocate_info<size, big_endian>* relinfo_; | |
949 | size_t relnum_; | |
950 | Address r_offset_; | |
951 | }; | |
952 | ||
42cacb20 | 953 | // The class which scans relocations. |
e3deeb9c | 954 | class Scan : protected Track_tls |
42cacb20 DE |
955 | { |
956 | public: | |
bfdfa4cd AM |
957 | typedef typename elfcpp::Elf_types<size>::Elf_Addr Address; |
958 | ||
42cacb20 | 959 | Scan() |
e3deeb9c | 960 | : Track_tls(), issued_non_pic_error_(false) |
42cacb20 DE |
961 | { } |
962 | ||
95a2c8d6 | 963 | static inline int |
88b8e639 | 964 | get_reference_flags(unsigned int r_type, const Target_powerpc* target); |
95a2c8d6 | 965 | |
42cacb20 | 966 | inline void |
ad0f2072 | 967 | local(Symbol_table* symtab, Layout* layout, Target_powerpc* target, |
6fa2a40b | 968 | Sized_relobj_file<size, big_endian>* object, |
42cacb20 DE |
969 | unsigned int data_shndx, |
970 | Output_section* output_section, | |
971 | const elfcpp::Rela<size, big_endian>& reloc, unsigned int r_type, | |
bfdfa4cd AM |
972 | const elfcpp::Sym<size, big_endian>& lsym, |
973 | bool is_discarded); | |
42cacb20 DE |
974 | |
975 | inline void | |
ad0f2072 | 976 | global(Symbol_table* symtab, Layout* layout, Target_powerpc* target, |
6fa2a40b | 977 | Sized_relobj_file<size, big_endian>* object, |
42cacb20 DE |
978 | unsigned int data_shndx, |
979 | Output_section* output_section, | |
980 | const elfcpp::Rela<size, big_endian>& reloc, unsigned int r_type, | |
981 | Symbol* gsym); | |
982 | ||
21bb3914 ST |
983 | inline bool |
984 | local_reloc_may_be_function_pointer(Symbol_table* , Layout* , | |
985 | Target_powerpc* , | |
f6971787 | 986 | Sized_relobj_file<size, big_endian>* relobj, |
21bb3914 | 987 | unsigned int , |
2e702c99 RM |
988 | Output_section* , |
989 | const elfcpp::Rela<size, big_endian>& , | |
4d9aa155 | 990 | unsigned int r_type, |
2e702c99 | 991 | const elfcpp::Sym<size, big_endian>&) |
4d9aa155 AM |
992 | { |
993 | // PowerPC64 .opd is not folded, so any identical function text | |
994 | // may be folded and we'll still keep function addresses distinct. | |
995 | // That means no reloc is of concern here. | |
996 | if (size == 64) | |
f6971787 AM |
997 | { |
998 | Powerpc_relobj<size, big_endian>* ppcobj = static_cast | |
999 | <Powerpc_relobj<size, big_endian>*>(relobj); | |
1000 | if (ppcobj->abiversion() == 1) | |
1001 | return false; | |
1002 | } | |
1003 | // For 32-bit and ELFv2, conservatively assume anything but calls to | |
4d9aa155 AM |
1004 | // function code might be taking the address of the function. |
1005 | return !is_branch_reloc(r_type); | |
1006 | } | |
21bb3914 ST |
1007 | |
1008 | inline bool | |
1009 | global_reloc_may_be_function_pointer(Symbol_table* , Layout* , | |
1010 | Target_powerpc* , | |
f6971787 | 1011 | Sized_relobj_file<size, big_endian>* relobj, |
2e702c99 RM |
1012 | unsigned int , |
1013 | Output_section* , | |
4d9aa155 AM |
1014 | const elfcpp::Rela<size, big_endian>& , |
1015 | unsigned int r_type, | |
1016 | Symbol*) | |
1017 | { | |
1018 | // As above. | |
1019 | if (size == 64) | |
f6971787 AM |
1020 | { |
1021 | Powerpc_relobj<size, big_endian>* ppcobj = static_cast | |
1022 | <Powerpc_relobj<size, big_endian>*>(relobj); | |
1023 | if (ppcobj->abiversion() == 1) | |
1024 | return false; | |
1025 | } | |
4d9aa155 AM |
1026 | return !is_branch_reloc(r_type); |
1027 | } | |
21bb3914 | 1028 | |
b3ccdeb5 | 1029 | static bool |
9055360d AM |
1030 | reloc_needs_plt_for_ifunc(Target_powerpc<size, big_endian>* target, |
1031 | Sized_relobj_file<size, big_endian>* object, | |
b3ccdeb5 AM |
1032 | unsigned int r_type, bool report_err); |
1033 | ||
42cacb20 DE |
1034 | private: |
1035 | static void | |
6fa2a40b | 1036 | unsupported_reloc_local(Sized_relobj_file<size, big_endian>*, |
42cacb20 DE |
1037 | unsigned int r_type); |
1038 | ||
1039 | static void | |
6fa2a40b | 1040 | unsupported_reloc_global(Sized_relobj_file<size, big_endian>*, |
42cacb20 DE |
1041 | unsigned int r_type, Symbol*); |
1042 | ||
1043 | static void | |
1044 | generate_tls_call(Symbol_table* symtab, Layout* layout, | |
1045 | Target_powerpc* target); | |
1046 | ||
1047 | void | |
1048 | check_non_pic(Relobj*, unsigned int r_type); | |
1049 | ||
1050 | // Whether we have issued an error about a non-PIC compilation. | |
1051 | bool issued_non_pic_error_; | |
1052 | }; | |
1053 | ||
1611bc4a AM |
1054 | bool |
1055 | symval_for_branch(const Symbol_table* symtab, | |
6c77229c | 1056 | const Sized_symbol<size>* gsym, |
3ea0a085 | 1057 | Powerpc_relobj<size, big_endian>* object, |
1611bc4a | 1058 | Address *value, unsigned int *dest_shndx); |
3ea0a085 | 1059 | |
42cacb20 | 1060 | // The class which implements relocation. |
e3deeb9c | 1061 | class Relocate : protected Track_tls |
42cacb20 DE |
1062 | { |
1063 | public: | |
dd93cd0a AM |
1064 | // Use 'at' branch hints when true, 'y' when false. |
1065 | // FIXME maybe: set this with an option. | |
1066 | static const bool is_isa_v2 = true; | |
1067 | ||
dd93cd0a | 1068 | Relocate() |
e3deeb9c | 1069 | : Track_tls() |
dd93cd0a AM |
1070 | { } |
1071 | ||
42cacb20 DE |
1072 | // Do a relocation. Return false if the caller should not issue |
1073 | // any warnings about this relocation. | |
1074 | inline bool | |
1075 | relocate(const Relocate_info<size, big_endian>*, Target_powerpc*, | |
031cdbed ILT |
1076 | Output_section*, size_t relnum, |
1077 | const elfcpp::Rela<size, big_endian>&, | |
42cacb20 DE |
1078 | unsigned int r_type, const Sized_symbol<size>*, |
1079 | const Symbol_value<size>*, | |
1080 | unsigned char*, | |
1081 | typename elfcpp::Elf_types<size>::Elf_Addr, | |
1082 | section_size_type); | |
42cacb20 DE |
1083 | }; |
1084 | ||
168a4726 AM |
1085 | class Relocate_comdat_behavior |
1086 | { | |
1087 | public: | |
1088 | // Decide what the linker should do for relocations that refer to | |
1089 | // discarded comdat sections. | |
1090 | inline Comdat_behavior | |
1091 | get(const char* name) | |
1092 | { | |
1093 | gold::Default_comdat_behavior default_behavior; | |
1094 | Comdat_behavior ret = default_behavior.get(name); | |
1095 | if (ret == CB_WARNING) | |
1096 | { | |
1097 | if (size == 32 | |
1098 | && (strcmp(name, ".fixup") == 0 | |
1099 | || strcmp(name, ".got2") == 0)) | |
1100 | ret = CB_IGNORE; | |
1101 | if (size == 64 | |
1102 | && (strcmp(name, ".opd") == 0 | |
1103 | || strcmp(name, ".toc") == 0 | |
1104 | || strcmp(name, ".toc1") == 0)) | |
1105 | ret = CB_IGNORE; | |
1106 | } | |
1107 | return ret; | |
1108 | } | |
1109 | }; | |
1110 | ||
42cacb20 DE |
1111 | // A class which returns the size required for a relocation type, |
1112 | // used while scanning relocs during a relocatable link. | |
1113 | class Relocatable_size_for_reloc | |
1114 | { | |
1115 | public: | |
1116 | unsigned int | |
cf43a2fe AM |
1117 | get_size_for_reloc(unsigned int, Relobj*) |
1118 | { | |
1119 | gold_unreachable(); | |
1120 | return 0; | |
1121 | } | |
42cacb20 DE |
1122 | }; |
1123 | ||
dd93cd0a AM |
1124 | // Optimize the TLS relocation type based on what we know about the |
1125 | // symbol. IS_FINAL is true if the final address of this symbol is | |
1126 | // known at link time. | |
1127 | ||
1128 | tls::Tls_optimization | |
1129 | optimize_tls_gd(bool is_final) | |
1130 | { | |
1131 | // If we are generating a shared library, then we can't do anything | |
1132 | // in the linker. | |
1133 | if (parameters->options().shared()) | |
1134 | return tls::TLSOPT_NONE; | |
1135 | ||
1136 | if (!is_final) | |
1137 | return tls::TLSOPT_TO_IE; | |
1138 | return tls::TLSOPT_TO_LE; | |
1139 | } | |
1140 | ||
1141 | tls::Tls_optimization | |
1142 | optimize_tls_ld() | |
1143 | { | |
1144 | if (parameters->options().shared()) | |
1145 | return tls::TLSOPT_NONE; | |
1146 | ||
1147 | return tls::TLSOPT_TO_LE; | |
1148 | } | |
1149 | ||
1150 | tls::Tls_optimization | |
1151 | optimize_tls_ie(bool is_final) | |
1152 | { | |
1153 | if (!is_final || parameters->options().shared()) | |
1154 | return tls::TLSOPT_NONE; | |
1155 | ||
1156 | return tls::TLSOPT_TO_LE; | |
1157 | } | |
cf43a2fe | 1158 | |
cf43a2fe AM |
1159 | // Create glink. |
1160 | void | |
1161 | make_glink_section(Layout*); | |
42cacb20 | 1162 | |
cf43a2fe AM |
1163 | // Create the PLT section. |
1164 | void | |
40b469d7 | 1165 | make_plt_section(Symbol_table*, Layout*); |
42cacb20 | 1166 | |
e5d5f5ed | 1167 | void |
40b469d7 | 1168 | make_iplt_section(Symbol_table*, Layout*); |
e5d5f5ed | 1169 | |
ec661b9d AM |
1170 | void |
1171 | make_brlt_section(Layout*); | |
1172 | ||
42cacb20 DE |
1173 | // Create a PLT entry for a global symbol. |
1174 | void | |
ec661b9d | 1175 | make_plt_entry(Symbol_table*, Layout*, Symbol*); |
e5d5f5ed AM |
1176 | |
1177 | // Create a PLT entry for a local IFUNC symbol. | |
1178 | void | |
40b469d7 | 1179 | make_local_ifunc_plt_entry(Symbol_table*, Layout*, |
ec661b9d AM |
1180 | Sized_relobj_file<size, big_endian>*, |
1181 | unsigned int); | |
1182 | ||
42cacb20 | 1183 | |
dd93cd0a AM |
1184 | // Create a GOT entry for local dynamic __tls_get_addr. |
1185 | unsigned int | |
1186 | tlsld_got_offset(Symbol_table* symtab, Layout* layout, | |
1187 | Sized_relobj_file<size, big_endian>* object); | |
1188 | ||
42cacb20 | 1189 | unsigned int |
dd93cd0a AM |
1190 | tlsld_got_offset() const |
1191 | { | |
1192 | return this->tlsld_got_offset_; | |
1193 | } | |
42cacb20 | 1194 | |
42cacb20 DE |
1195 | // Get the dynamic reloc section, creating it if necessary. |
1196 | Reloc_section* | |
1197 | rela_dyn_section(Layout*); | |
1198 | ||
b3ccdeb5 AM |
1199 | // Similarly, but for ifunc symbols get the one for ifunc. |
1200 | Reloc_section* | |
1201 | rela_dyn_section(Symbol_table*, Layout*, bool for_ifunc); | |
1202 | ||
42cacb20 DE |
1203 | // Copy a relocation against a global symbol. |
1204 | void | |
ef9beddf | 1205 | copy_reloc(Symbol_table* symtab, Layout* layout, |
2e702c99 | 1206 | Sized_relobj_file<size, big_endian>* object, |
42cacb20 DE |
1207 | unsigned int shndx, Output_section* output_section, |
1208 | Symbol* sym, const elfcpp::Rela<size, big_endian>& reloc) | |
1209 | { | |
859d7987 | 1210 | unsigned int r_type = elfcpp::elf_r_type<size>(reloc.get_r_info()); |
42cacb20 DE |
1211 | this->copy_relocs_.copy_reloc(symtab, layout, |
1212 | symtab->get_sized_symbol<size>(sym), | |
1213 | object, shndx, output_section, | |
859d7987 CC |
1214 | r_type, reloc.get_r_offset(), |
1215 | reloc.get_r_addend(), | |
1216 | this->rela_dyn_section(layout)); | |
42cacb20 DE |
1217 | } |
1218 | ||
0cfdc767 | 1219 | // Look over all the input sections, deciding where to place stubs. |
ec661b9d | 1220 | void |
a3e60ddb | 1221 | group_sections(Layout*, const Task*, bool); |
ec661b9d AM |
1222 | |
1223 | // Sort output sections by address. | |
1224 | struct Sort_sections | |
1225 | { | |
1226 | bool | |
1227 | operator()(const Output_section* sec1, const Output_section* sec2) | |
1228 | { return sec1->address() < sec2->address(); } | |
1229 | }; | |
1230 | ||
1231 | class Branch_info | |
1232 | { | |
1233 | public: | |
1234 | Branch_info(Powerpc_relobj<size, big_endian>* ppc_object, | |
1235 | unsigned int data_shndx, | |
1236 | Address r_offset, | |
1237 | unsigned int r_type, | |
1238 | unsigned int r_sym, | |
1239 | Address addend) | |
1240 | : object_(ppc_object), shndx_(data_shndx), offset_(r_offset), | |
1241 | r_type_(r_type), r_sym_(r_sym), addend_(addend) | |
1242 | { } | |
1243 | ||
1244 | ~Branch_info() | |
1245 | { } | |
1246 | ||
1247 | // If this branch needs a plt call stub, or a long branch stub, make one. | |
a3e60ddb | 1248 | bool |
ec661b9d AM |
1249 | make_stub(Stub_table<size, big_endian>*, |
1250 | Stub_table<size, big_endian>*, | |
1251 | Symbol_table*) const; | |
1252 | ||
1253 | private: | |
1254 | // The branch location.. | |
1255 | Powerpc_relobj<size, big_endian>* object_; | |
1256 | unsigned int shndx_; | |
1257 | Address offset_; | |
1258 | // ..and the branch type and destination. | |
1259 | unsigned int r_type_; | |
1260 | unsigned int r_sym_; | |
1261 | Address addend_; | |
1262 | }; | |
1263 | ||
42cacb20 DE |
1264 | // Information about this specific target which we pass to the |
1265 | // general Target structure. | |
1266 | static Target::Target_info powerpc_info; | |
1267 | ||
1268 | // The types of GOT entries needed for this platform. | |
0e70b911 CC |
1269 | // These values are exposed to the ABI in an incremental link. |
1270 | // Do not renumber existing values without changing the version | |
1271 | // number of the .gnu_incremental_inputs section. | |
42cacb20 DE |
1272 | enum Got_type |
1273 | { | |
dd93cd0a AM |
1274 | GOT_TYPE_STANDARD, |
1275 | GOT_TYPE_TLSGD, // double entry for @got@tlsgd | |
1276 | GOT_TYPE_DTPREL, // entry for @got@dtprel | |
1277 | GOT_TYPE_TPREL // entry for @got@tprel | |
42cacb20 DE |
1278 | }; |
1279 | ||
ec661b9d | 1280 | // The GOT section. |
cf43a2fe | 1281 | Output_data_got_powerpc<size, big_endian>* got_; |
b3ccdeb5 AM |
1282 | // The PLT section. This is a container for a table of addresses, |
1283 | // and their relocations. Each address in the PLT has a dynamic | |
1284 | // relocation (R_*_JMP_SLOT) and each address will have a | |
1285 | // corresponding entry in .glink for lazy resolution of the PLT. | |
1286 | // ppc32 initialises the PLT to point at the .glink entry, while | |
1287 | // ppc64 leaves this to ld.so. To make a call via the PLT, the | |
1288 | // linker adds a stub that loads the PLT entry into ctr then | |
1289 | // branches to ctr. There may be more than one stub for each PLT | |
1290 | // entry. DT_JMPREL points at the first PLT dynamic relocation and | |
1291 | // DT_PLTRELSZ gives the total size of PLT dynamic relocations. | |
42cacb20 | 1292 | Output_data_plt_powerpc<size, big_endian>* plt_; |
b3ccdeb5 AM |
1293 | // The IPLT section. Like plt_, this is a container for a table of |
1294 | // addresses and their relocations, specifically for STT_GNU_IFUNC | |
1295 | // functions that resolve locally (STT_GNU_IFUNC functions that | |
1296 | // don't resolve locally go in PLT). Unlike plt_, these have no | |
1297 | // entry in .glink for lazy resolution, and the relocation section | |
1298 | // does not have a 1-1 correspondence with IPLT addresses. In fact, | |
1299 | // the relocation section may contain relocations against | |
1300 | // STT_GNU_IFUNC symbols at locations outside of IPLT. The | |
1301 | // relocation section will appear at the end of other dynamic | |
1302 | // relocations, so that ld.so applies these relocations after other | |
1303 | // dynamic relocations. In a static executable, the relocation | |
1304 | // section is emitted and marked with __rela_iplt_start and | |
1305 | // __rela_iplt_end symbols. | |
e5d5f5ed | 1306 | Output_data_plt_powerpc<size, big_endian>* iplt_; |
ec661b9d AM |
1307 | // Section holding long branch destinations. |
1308 | Output_data_brlt_powerpc<size, big_endian>* brlt_section_; | |
1309 | // The .glink section. | |
cf43a2fe | 1310 | Output_data_glink<size, big_endian>* glink_; |
ec661b9d | 1311 | // The dynamic reloc section. |
42cacb20 DE |
1312 | Reloc_section* rela_dyn_; |
1313 | // Relocs saved to avoid a COPY reloc. | |
1314 | Copy_relocs<elfcpp::SHT_RELA, size, big_endian> copy_relocs_; | |
dd93cd0a AM |
1315 | // Offset of the GOT entry for local dynamic __tls_get_addr calls. |
1316 | unsigned int tlsld_got_offset_; | |
ec661b9d AM |
1317 | |
1318 | Stub_tables stub_tables_; | |
1319 | typedef Unordered_map<Address, unsigned int> Branch_lookup_table; | |
1320 | Branch_lookup_table branch_lookup_table_; | |
1321 | ||
1322 | typedef std::vector<Branch_info> Branches; | |
1323 | Branches branch_info_; | |
9e69ed50 AM |
1324 | |
1325 | bool plt_thread_safe_; | |
a3e60ddb AM |
1326 | |
1327 | bool relax_failed_; | |
1328 | int relax_fail_count_; | |
1329 | int32_t stub_group_size_; | |
d49044c7 AM |
1330 | |
1331 | Output_data_save_res<size, big_endian> *savres_section_; | |
42cacb20 DE |
1332 | }; |
1333 | ||
1334 | template<> | |
1335 | Target::Target_info Target_powerpc<32, true>::powerpc_info = | |
1336 | { | |
1337 | 32, // size | |
1338 | true, // is_big_endian | |
1339 | elfcpp::EM_PPC, // machine_code | |
1340 | false, // has_make_symbol | |
1341 | false, // has_resolve | |
1342 | false, // has_code_fill | |
1343 | true, // is_default_stack_executable | |
b3ce541e | 1344 | false, // can_icf_inline_merge_sections |
42cacb20 DE |
1345 | '\0', // wrap_char |
1346 | "/usr/lib/ld.so.1", // dynamic_linker | |
1347 | 0x10000000, // default_text_segment_address | |
1348 | 64 * 1024, // abi_pagesize (overridable by -z max-page-size) | |
8a5e3e08 | 1349 | 4 * 1024, // common_pagesize (overridable by -z common-page-size) |
c9269dff AM |
1350 | false, // isolate_execinstr |
1351 | 0, // rosegment_gap | |
8a5e3e08 ILT |
1352 | elfcpp::SHN_UNDEF, // small_common_shndx |
1353 | elfcpp::SHN_UNDEF, // large_common_shndx | |
1354 | 0, // small_common_section_flags | |
05a352e6 DK |
1355 | 0, // large_common_section_flags |
1356 | NULL, // attributes_section | |
a67858e0 | 1357 | NULL, // attributes_vendor |
8d9743bd MK |
1358 | "_start", // entry_symbol_name |
1359 | 32, // hash_entry_size | |
42cacb20 DE |
1360 | }; |
1361 | ||
1362 | template<> | |
1363 | Target::Target_info Target_powerpc<32, false>::powerpc_info = | |
1364 | { | |
1365 | 32, // size | |
1366 | false, // is_big_endian | |
1367 | elfcpp::EM_PPC, // machine_code | |
1368 | false, // has_make_symbol | |
1369 | false, // has_resolve | |
1370 | false, // has_code_fill | |
1371 | true, // is_default_stack_executable | |
b3ce541e | 1372 | false, // can_icf_inline_merge_sections |
42cacb20 DE |
1373 | '\0', // wrap_char |
1374 | "/usr/lib/ld.so.1", // dynamic_linker | |
1375 | 0x10000000, // default_text_segment_address | |
1376 | 64 * 1024, // abi_pagesize (overridable by -z max-page-size) | |
8a5e3e08 | 1377 | 4 * 1024, // common_pagesize (overridable by -z common-page-size) |
c9269dff AM |
1378 | false, // isolate_execinstr |
1379 | 0, // rosegment_gap | |
8a5e3e08 ILT |
1380 | elfcpp::SHN_UNDEF, // small_common_shndx |
1381 | elfcpp::SHN_UNDEF, // large_common_shndx | |
1382 | 0, // small_common_section_flags | |
05a352e6 DK |
1383 | 0, // large_common_section_flags |
1384 | NULL, // attributes_section | |
a67858e0 | 1385 | NULL, // attributes_vendor |
8d9743bd MK |
1386 | "_start", // entry_symbol_name |
1387 | 32, // hash_entry_size | |
42cacb20 DE |
1388 | }; |
1389 | ||
1390 | template<> | |
1391 | Target::Target_info Target_powerpc<64, true>::powerpc_info = | |
1392 | { | |
1393 | 64, // size | |
1394 | true, // is_big_endian | |
1395 | elfcpp::EM_PPC64, // machine_code | |
1396 | false, // has_make_symbol | |
1397 | false, // has_resolve | |
1398 | false, // has_code_fill | |
1399 | true, // is_default_stack_executable | |
b3ce541e | 1400 | false, // can_icf_inline_merge_sections |
42cacb20 DE |
1401 | '\0', // wrap_char |
1402 | "/usr/lib/ld.so.1", // dynamic_linker | |
1403 | 0x10000000, // default_text_segment_address | |
1404 | 64 * 1024, // abi_pagesize (overridable by -z max-page-size) | |
dd93cd0a | 1405 | 4 * 1024, // common_pagesize (overridable by -z common-page-size) |
c9269dff AM |
1406 | false, // isolate_execinstr |
1407 | 0, // rosegment_gap | |
8a5e3e08 ILT |
1408 | elfcpp::SHN_UNDEF, // small_common_shndx |
1409 | elfcpp::SHN_UNDEF, // large_common_shndx | |
1410 | 0, // small_common_section_flags | |
05a352e6 DK |
1411 | 0, // large_common_section_flags |
1412 | NULL, // attributes_section | |
a67858e0 | 1413 | NULL, // attributes_vendor |
8d9743bd MK |
1414 | "_start", // entry_symbol_name |
1415 | 32, // hash_entry_size | |
42cacb20 DE |
1416 | }; |
1417 | ||
1418 | template<> | |
1419 | Target::Target_info Target_powerpc<64, false>::powerpc_info = | |
1420 | { | |
1421 | 64, // size | |
1422 | false, // is_big_endian | |
1423 | elfcpp::EM_PPC64, // machine_code | |
1424 | false, // has_make_symbol | |
1425 | false, // has_resolve | |
1426 | false, // has_code_fill | |
1427 | true, // is_default_stack_executable | |
b3ce541e | 1428 | false, // can_icf_inline_merge_sections |
42cacb20 DE |
1429 | '\0', // wrap_char |
1430 | "/usr/lib/ld.so.1", // dynamic_linker | |
1431 | 0x10000000, // default_text_segment_address | |
1432 | 64 * 1024, // abi_pagesize (overridable by -z max-page-size) | |
dd93cd0a | 1433 | 4 * 1024, // common_pagesize (overridable by -z common-page-size) |
c9269dff AM |
1434 | false, // isolate_execinstr |
1435 | 0, // rosegment_gap | |
8a5e3e08 ILT |
1436 | elfcpp::SHN_UNDEF, // small_common_shndx |
1437 | elfcpp::SHN_UNDEF, // large_common_shndx | |
1438 | 0, // small_common_section_flags | |
05a352e6 DK |
1439 | 0, // large_common_section_flags |
1440 | NULL, // attributes_section | |
a67858e0 | 1441 | NULL, // attributes_vendor |
8d9743bd MK |
1442 | "_start", // entry_symbol_name |
1443 | 32, // hash_entry_size | |
42cacb20 DE |
1444 | }; |
1445 | ||
dd93cd0a AM |
1446 | inline bool |
1447 | is_branch_reloc(unsigned int r_type) | |
1448 | { | |
1449 | return (r_type == elfcpp::R_POWERPC_REL24 | |
1450 | || r_type == elfcpp::R_PPC_PLTREL24 | |
1451 | || r_type == elfcpp::R_PPC_LOCAL24PC | |
1452 | || r_type == elfcpp::R_POWERPC_REL14 | |
1453 | || r_type == elfcpp::R_POWERPC_REL14_BRTAKEN | |
1454 | || r_type == elfcpp::R_POWERPC_REL14_BRNTAKEN | |
1455 | || r_type == elfcpp::R_POWERPC_ADDR24 | |
1456 | || r_type == elfcpp::R_POWERPC_ADDR14 | |
1457 | || r_type == elfcpp::R_POWERPC_ADDR14_BRTAKEN | |
1458 | || r_type == elfcpp::R_POWERPC_ADDR14_BRNTAKEN); | |
1459 | } | |
1460 | ||
1461 | // If INSN is an opcode that may be used with an @tls operand, return | |
1462 | // the transformed insn for TLS optimisation, otherwise return 0. If | |
1463 | // REG is non-zero only match an insn with RB or RA equal to REG. | |
1464 | uint32_t | |
1465 | at_tls_transform(uint32_t insn, unsigned int reg) | |
1466 | { | |
1467 | if ((insn & (0x3f << 26)) != 31 << 26) | |
1468 | return 0; | |
1469 | ||
1470 | unsigned int rtra; | |
1471 | if (reg == 0 || ((insn >> 11) & 0x1f) == reg) | |
1472 | rtra = insn & ((1 << 26) - (1 << 16)); | |
1473 | else if (((insn >> 16) & 0x1f) == reg) | |
1474 | rtra = (insn & (0x1f << 21)) | ((insn & (0x1f << 11)) << 5); | |
1475 | else | |
1476 | return 0; | |
1477 | ||
1478 | if ((insn & (0x3ff << 1)) == 266 << 1) | |
1479 | // add -> addi | |
1480 | insn = 14 << 26; | |
1481 | else if ((insn & (0x1f << 1)) == 23 << 1 | |
1482 | && ((insn & (0x1f << 6)) < 14 << 6 | |
1483 | || ((insn & (0x1f << 6)) >= 16 << 6 | |
1484 | && (insn & (0x1f << 6)) < 24 << 6))) | |
1485 | // load and store indexed -> dform | |
1486 | insn = (32 | ((insn >> 6) & 0x1f)) << 26; | |
1487 | else if ((insn & (((0x1a << 5) | 0x1f) << 1)) == 21 << 1) | |
1488 | // ldx, ldux, stdx, stdux -> ld, ldu, std, stdu | |
1489 | insn = ((58 | ((insn >> 6) & 4)) << 26) | ((insn >> 6) & 1); | |
1490 | else if ((insn & (((0x1f << 5) | 0x1f) << 1)) == 341 << 1) | |
1491 | // lwax -> lwa | |
1492 | insn = (58 << 26) | 2; | |
1493 | else | |
1494 | return 0; | |
1495 | insn |= rtra; | |
1496 | return insn; | |
1497 | } | |
1498 | ||
dd93cd0a | 1499 | |
42cacb20 DE |
1500 | template<int size, bool big_endian> |
1501 | class Powerpc_relocate_functions | |
1502 | { | |
dd93cd0a | 1503 | public: |
f4baf0d4 | 1504 | enum Overflow_check |
dd93cd0a | 1505 | { |
f4baf0d4 AM |
1506 | CHECK_NONE, |
1507 | CHECK_SIGNED, | |
b80eed39 AM |
1508 | CHECK_UNSIGNED, |
1509 | CHECK_BITFIELD, | |
1510 | CHECK_LOW_INSN, | |
1511 | CHECK_HIGH_INSN | |
dd93cd0a AM |
1512 | }; |
1513 | ||
f4baf0d4 | 1514 | enum Status |
dd93cd0a | 1515 | { |
f4baf0d4 AM |
1516 | STATUS_OK, |
1517 | STATUS_OVERFLOW | |
1518 | }; | |
dd93cd0a | 1519 | |
42cacb20 | 1520 | private: |
c9269dff | 1521 | typedef Powerpc_relocate_functions<size, big_endian> This; |
c9269dff | 1522 | typedef typename elfcpp::Elf_types<size>::Elf_Addr Address; |
a680de9a | 1523 | typedef typename elfcpp::Elf_types<size>::Elf_Swxword SignedAddress; |
c9269dff | 1524 | |
dd93cd0a AM |
1525 | template<int valsize> |
1526 | static inline bool | |
1527 | has_overflow_signed(Address value) | |
1528 | { | |
1529 | // limit = 1 << (valsize - 1) without shift count exceeding size of type | |
1530 | Address limit = static_cast<Address>(1) << ((valsize - 1) >> 1); | |
1531 | limit <<= ((valsize - 1) >> 1); | |
1532 | limit <<= ((valsize - 1) - 2 * ((valsize - 1) >> 1)); | |
1533 | return value + limit > (limit << 1) - 1; | |
1534 | } | |
1535 | ||
1536 | template<int valsize> | |
1537 | static inline bool | |
b80eed39 | 1538 | has_overflow_unsigned(Address value) |
dd93cd0a AM |
1539 | { |
1540 | Address limit = static_cast<Address>(1) << ((valsize - 1) >> 1); | |
1541 | limit <<= ((valsize - 1) >> 1); | |
1542 | limit <<= ((valsize - 1) - 2 * ((valsize - 1) >> 1)); | |
b80eed39 AM |
1543 | return value > (limit << 1) - 1; |
1544 | } | |
1545 | ||
1546 | template<int valsize> | |
1547 | static inline bool | |
1548 | has_overflow_bitfield(Address value) | |
1549 | { | |
1550 | return (has_overflow_unsigned<valsize>(value) | |
1551 | && has_overflow_signed<valsize>(value)); | |
dd93cd0a AM |
1552 | } |
1553 | ||
1554 | template<int valsize> | |
f4baf0d4 AM |
1555 | static inline Status |
1556 | overflowed(Address value, Overflow_check overflow) | |
dd93cd0a | 1557 | { |
f4baf0d4 | 1558 | if (overflow == CHECK_SIGNED) |
dd93cd0a AM |
1559 | { |
1560 | if (has_overflow_signed<valsize>(value)) | |
f4baf0d4 | 1561 | return STATUS_OVERFLOW; |
dd93cd0a | 1562 | } |
b80eed39 AM |
1563 | else if (overflow == CHECK_UNSIGNED) |
1564 | { | |
1565 | if (has_overflow_unsigned<valsize>(value)) | |
1566 | return STATUS_OVERFLOW; | |
1567 | } | |
f4baf0d4 | 1568 | else if (overflow == CHECK_BITFIELD) |
dd93cd0a AM |
1569 | { |
1570 | if (has_overflow_bitfield<valsize>(value)) | |
f4baf0d4 | 1571 | return STATUS_OVERFLOW; |
dd93cd0a | 1572 | } |
f4baf0d4 | 1573 | return STATUS_OK; |
dd93cd0a AM |
1574 | } |
1575 | ||
cf43a2fe | 1576 | // Do a simple RELA relocation |
0cfb0717 | 1577 | template<int fieldsize, int valsize> |
f4baf0d4 AM |
1578 | static inline Status |
1579 | rela(unsigned char* view, Address value, Overflow_check overflow) | |
dd93cd0a | 1580 | { |
0cfb0717 | 1581 | typedef typename elfcpp::Swap<fieldsize, big_endian>::Valtype Valtype; |
dd93cd0a | 1582 | Valtype* wv = reinterpret_cast<Valtype*>(view); |
0cfb0717 | 1583 | elfcpp::Swap<fieldsize, big_endian>::writeval(wv, value); |
dd93cd0a AM |
1584 | return overflowed<valsize>(value, overflow); |
1585 | } | |
1586 | ||
0cfb0717 | 1587 | template<int fieldsize, int valsize> |
f4baf0d4 | 1588 | static inline Status |
42cacb20 DE |
1589 | rela(unsigned char* view, |
1590 | unsigned int right_shift, | |
0cfb0717 | 1591 | typename elfcpp::Valtype_base<fieldsize>::Valtype dst_mask, |
c9269dff | 1592 | Address value, |
f4baf0d4 | 1593 | Overflow_check overflow) |
42cacb20 | 1594 | { |
0cfb0717 | 1595 | typedef typename elfcpp::Swap<fieldsize, big_endian>::Valtype Valtype; |
42cacb20 | 1596 | Valtype* wv = reinterpret_cast<Valtype*>(view); |
0cfb0717 | 1597 | Valtype val = elfcpp::Swap<fieldsize, big_endian>::readval(wv); |
dd93cd0a | 1598 | Valtype reloc = value >> right_shift; |
42cacb20 DE |
1599 | val &= ~dst_mask; |
1600 | reloc &= dst_mask; | |
0cfb0717 | 1601 | elfcpp::Swap<fieldsize, big_endian>::writeval(wv, val | reloc); |
dd93cd0a | 1602 | return overflowed<valsize>(value >> right_shift, overflow); |
42cacb20 DE |
1603 | } |
1604 | ||
cf43a2fe | 1605 | // Do a simple RELA relocation, unaligned. |
0cfb0717 | 1606 | template<int fieldsize, int valsize> |
f4baf0d4 AM |
1607 | static inline Status |
1608 | rela_ua(unsigned char* view, Address value, Overflow_check overflow) | |
dd93cd0a | 1609 | { |
0cfb0717 | 1610 | elfcpp::Swap_unaligned<fieldsize, big_endian>::writeval(view, value); |
dd93cd0a AM |
1611 | return overflowed<valsize>(value, overflow); |
1612 | } | |
1613 | ||
0cfb0717 | 1614 | template<int fieldsize, int valsize> |
f4baf0d4 | 1615 | static inline Status |
cf43a2fe AM |
1616 | rela_ua(unsigned char* view, |
1617 | unsigned int right_shift, | |
0cfb0717 | 1618 | typename elfcpp::Valtype_base<fieldsize>::Valtype dst_mask, |
c9269dff | 1619 | Address value, |
f4baf0d4 | 1620 | Overflow_check overflow) |
42cacb20 | 1621 | { |
0cfb0717 | 1622 | typedef typename elfcpp::Swap_unaligned<fieldsize, big_endian>::Valtype |
c9269dff | 1623 | Valtype; |
0cfb0717 | 1624 | Valtype val = elfcpp::Swap<fieldsize, big_endian>::readval(view); |
dd93cd0a | 1625 | Valtype reloc = value >> right_shift; |
42cacb20 DE |
1626 | val &= ~dst_mask; |
1627 | reloc &= dst_mask; | |
0cfb0717 | 1628 | elfcpp::Swap_unaligned<fieldsize, big_endian>::writeval(view, val | reloc); |
dd93cd0a | 1629 | return overflowed<valsize>(value >> right_shift, overflow); |
42cacb20 DE |
1630 | } |
1631 | ||
42cacb20 | 1632 | public: |
dd93cd0a | 1633 | // R_PPC64_ADDR64: (Symbol + Addend) |
42cacb20 | 1634 | static inline void |
dd93cd0a | 1635 | addr64(unsigned char* view, Address value) |
0cfb0717 | 1636 | { This::template rela<64,64>(view, value, CHECK_NONE); } |
42cacb20 | 1637 | |
dd93cd0a | 1638 | // R_PPC64_UADDR64: (Symbol + Addend) unaligned |
42cacb20 | 1639 | static inline void |
dd93cd0a | 1640 | addr64_u(unsigned char* view, Address value) |
0cfb0717 | 1641 | { This::template rela_ua<64,64>(view, value, CHECK_NONE); } |
dd93cd0a AM |
1642 | |
1643 | // R_POWERPC_ADDR32: (Symbol + Addend) | |
f4baf0d4 AM |
1644 | static inline Status |
1645 | addr32(unsigned char* view, Address value, Overflow_check overflow) | |
0cfb0717 | 1646 | { return This::template rela<32,32>(view, value, overflow); } |
dd93cd0a AM |
1647 | |
1648 | // R_POWERPC_UADDR32: (Symbol + Addend) unaligned | |
f4baf0d4 AM |
1649 | static inline Status |
1650 | addr32_u(unsigned char* view, Address value, Overflow_check overflow) | |
0cfb0717 | 1651 | { return This::template rela_ua<32,32>(view, value, overflow); } |
dd93cd0a AM |
1652 | |
1653 | // R_POWERPC_ADDR24: (Symbol + Addend) & 0x3fffffc | |
f4baf0d4 AM |
1654 | static inline Status |
1655 | addr24(unsigned char* view, Address value, Overflow_check overflow) | |
dd93cd0a | 1656 | { |
0cfb0717 AM |
1657 | Status stat = This::template rela<32,26>(view, 0, 0x03fffffc, |
1658 | value, overflow); | |
f4baf0d4 AM |
1659 | if (overflow != CHECK_NONE && (value & 3) != 0) |
1660 | stat = STATUS_OVERFLOW; | |
dd93cd0a AM |
1661 | return stat; |
1662 | } | |
42cacb20 DE |
1663 | |
1664 | // R_POWERPC_ADDR16: (Symbol + Addend) & 0xffff | |
f4baf0d4 AM |
1665 | static inline Status |
1666 | addr16(unsigned char* view, Address value, Overflow_check overflow) | |
0cfb0717 | 1667 | { return This::template rela<16,16>(view, value, overflow); } |
42cacb20 | 1668 | |
dd93cd0a | 1669 | // R_POWERPC_ADDR16: (Symbol + Addend) & 0xffff, unaligned |
f4baf0d4 AM |
1670 | static inline Status |
1671 | addr16_u(unsigned char* view, Address value, Overflow_check overflow) | |
0cfb0717 | 1672 | { return This::template rela_ua<16,16>(view, value, overflow); } |
42cacb20 | 1673 | |
dd93cd0a | 1674 | // R_POWERPC_ADDR16_DS: (Symbol + Addend) & 0xfffc |
f4baf0d4 AM |
1675 | static inline Status |
1676 | addr16_ds(unsigned char* view, Address value, Overflow_check overflow) | |
dd93cd0a | 1677 | { |
0cfb0717 | 1678 | Status stat = This::template rela<16,16>(view, 0, 0xfffc, value, overflow); |
ec86f434 | 1679 | if ((value & 3) != 0) |
f4baf0d4 | 1680 | stat = STATUS_OVERFLOW; |
dd93cd0a AM |
1681 | return stat; |
1682 | } | |
42cacb20 | 1683 | |
a680de9a PB |
1684 | // R_POWERPC_ADDR16_DQ: (Symbol + Addend) & 0xfff0 |
1685 | static inline Status | |
1686 | addr16_dq(unsigned char* view, Address value, Overflow_check overflow) | |
1687 | { | |
1688 | Status stat = This::template rela<16,16>(view, 0, 0xfff0, value, overflow); | |
1689 | if ((value & 15) != 0) | |
1690 | stat = STATUS_OVERFLOW; | |
1691 | return stat; | |
1692 | } | |
1693 | ||
42cacb20 DE |
1694 | // R_POWERPC_ADDR16_HI: ((Symbol + Addend) >> 16) & 0xffff |
1695 | static inline void | |
dd93cd0a | 1696 | addr16_hi(unsigned char* view, Address value) |
0cfb0717 | 1697 | { This::template rela<16,16>(view, 16, 0xffff, value, CHECK_NONE); } |
42cacb20 | 1698 | |
c9269dff | 1699 | // R_POWERPC_ADDR16_HA: ((Symbol + Addend + 0x8000) >> 16) & 0xffff |
42cacb20 | 1700 | static inline void |
dd93cd0a AM |
1701 | addr16_ha(unsigned char* view, Address value) |
1702 | { This::addr16_hi(view, value + 0x8000); } | |
42cacb20 | 1703 | |
dd93cd0a | 1704 | // R_POWERPC_ADDR16_HIGHER: ((Symbol + Addend) >> 32) & 0xffff |
42cacb20 | 1705 | static inline void |
dd93cd0a | 1706 | addr16_hi2(unsigned char* view, Address value) |
0cfb0717 | 1707 | { This::template rela<16,16>(view, 32, 0xffff, value, CHECK_NONE); } |
42cacb20 | 1708 | |
dd93cd0a | 1709 | // R_POWERPC_ADDR16_HIGHERA: ((Symbol + Addend + 0x8000) >> 32) & 0xffff |
42cacb20 | 1710 | static inline void |
dd93cd0a AM |
1711 | addr16_ha2(unsigned char* view, Address value) |
1712 | { This::addr16_hi2(view, value + 0x8000); } | |
42cacb20 | 1713 | |
dd93cd0a | 1714 | // R_POWERPC_ADDR16_HIGHEST: ((Symbol + Addend) >> 48) & 0xffff |
42cacb20 | 1715 | static inline void |
dd93cd0a | 1716 | addr16_hi3(unsigned char* view, Address value) |
0cfb0717 | 1717 | { This::template rela<16,16>(view, 48, 0xffff, value, CHECK_NONE); } |
42cacb20 | 1718 | |
dd93cd0a | 1719 | // R_POWERPC_ADDR16_HIGHESTA: ((Symbol + Addend + 0x8000) >> 48) & 0xffff |
42cacb20 | 1720 | static inline void |
dd93cd0a AM |
1721 | addr16_ha3(unsigned char* view, Address value) |
1722 | { This::addr16_hi3(view, value + 0x8000); } | |
1723 | ||
1724 | // R_POWERPC_ADDR14: (Symbol + Addend) & 0xfffc | |
f4baf0d4 AM |
1725 | static inline Status |
1726 | addr14(unsigned char* view, Address value, Overflow_check overflow) | |
dd93cd0a | 1727 | { |
0cfb0717 | 1728 | Status stat = This::template rela<32,16>(view, 0, 0xfffc, value, overflow); |
f4baf0d4 AM |
1729 | if (overflow != CHECK_NONE && (value & 3) != 0) |
1730 | stat = STATUS_OVERFLOW; | |
dd93cd0a AM |
1731 | return stat; |
1732 | } | |
a680de9a PB |
1733 | |
1734 | // R_POWERPC_REL16DX_HA | |
1735 | static inline Status | |
1736 | addr16dx_ha(unsigned char *view, Address value, Overflow_check overflow) | |
1737 | { | |
1738 | typedef typename elfcpp::Swap<32, big_endian>::Valtype Valtype; | |
1739 | Valtype* wv = reinterpret_cast<Valtype*>(view); | |
1740 | Valtype val = elfcpp::Swap<32, big_endian>::readval(wv); | |
1741 | value += 0x8000; | |
1742 | value = static_cast<SignedAddress>(value) >> 16; | |
1743 | val |= (value & 0xffc1) | ((value & 0x3e) << 15); | |
1744 | elfcpp::Swap<32, big_endian>::writeval(wv, val); | |
1745 | return overflowed<16>(value, overflow); | |
1746 | } | |
cf43a2fe AM |
1747 | }; |
1748 | ||
b4f7960d AM |
1749 | // Set ABI version for input and output. |
1750 | ||
1751 | template<int size, bool big_endian> | |
1752 | void | |
1753 | Powerpc_relobj<size, big_endian>::set_abiversion(int ver) | |
1754 | { | |
1755 | this->e_flags_ |= ver; | |
1756 | if (this->abiversion() != 0) | |
1757 | { | |
1758 | Target_powerpc<size, big_endian>* target = | |
1759 | static_cast<Target_powerpc<size, big_endian>*>( | |
1760 | parameters->sized_target<size, big_endian>()); | |
1761 | if (target->abiversion() == 0) | |
1762 | target->set_abiversion(this->abiversion()); | |
1763 | else if (target->abiversion() != this->abiversion()) | |
1764 | gold_error(_("%s: ABI version %d is not compatible " | |
1765 | "with ABI version %d output"), | |
1766 | this->name().c_str(), | |
1767 | this->abiversion(), target->abiversion()); | |
1768 | ||
1769 | } | |
1770 | } | |
1771 | ||
c9269dff AM |
1772 | // Stash away the index of .got2 or .opd in a relocatable object, if |
1773 | // such a section exists. | |
cf43a2fe AM |
1774 | |
1775 | template<int size, bool big_endian> | |
1776 | bool | |
1777 | Powerpc_relobj<size, big_endian>::do_find_special_sections( | |
1778 | Read_symbols_data* sd) | |
1779 | { | |
c9269dff AM |
1780 | const unsigned char* const pshdrs = sd->section_headers->data(); |
1781 | const unsigned char* namesu = sd->section_names->data(); | |
1782 | const char* names = reinterpret_cast<const char*>(namesu); | |
1783 | section_size_type names_size = sd->section_names_size; | |
1784 | const unsigned char* s; | |
1785 | ||
dc3714f3 AM |
1786 | s = this->template find_shdr<size, big_endian>(pshdrs, |
1787 | size == 32 ? ".got2" : ".opd", | |
1788 | names, names_size, NULL); | |
c9269dff AM |
1789 | if (s != NULL) |
1790 | { | |
1791 | unsigned int ndx = (s - pshdrs) / elfcpp::Elf_sizes<size>::shdr_size; | |
1792 | this->special_ = ndx; | |
b4f7960d AM |
1793 | if (size == 64) |
1794 | { | |
1795 | if (this->abiversion() == 0) | |
1796 | this->set_abiversion(1); | |
1797 | else if (this->abiversion() > 1) | |
1798 | gold_error(_("%s: .opd invalid in abiv%d"), | |
1799 | this->name().c_str(), this->abiversion()); | |
1800 | } | |
c9269dff AM |
1801 | } |
1802 | return Sized_relobj_file<size, big_endian>::do_find_special_sections(sd); | |
1803 | } | |
1804 | ||
1805 | // Examine .rela.opd to build info about function entry points. | |
1806 | ||
1807 | template<int size, bool big_endian> | |
1808 | void | |
1809 | Powerpc_relobj<size, big_endian>::scan_opd_relocs( | |
1810 | size_t reloc_count, | |
1811 | const unsigned char* prelocs, | |
1812 | const unsigned char* plocal_syms) | |
1813 | { | |
1814 | if (size == 64) | |
cf43a2fe | 1815 | { |
c9269dff AM |
1816 | typedef typename Reloc_types<elfcpp::SHT_RELA, size, big_endian>::Reloc |
1817 | Reltype; | |
1818 | const int reloc_size | |
1819 | = Reloc_types<elfcpp::SHT_RELA, size, big_endian>::reloc_size; | |
1820 | const int sym_size = elfcpp::Elf_sizes<size>::sym_size; | |
ec4dbad3 AM |
1821 | Address expected_off = 0; |
1822 | bool regular = true; | |
1823 | unsigned int opd_ent_size = 0; | |
c9269dff AM |
1824 | |
1825 | for (size_t i = 0; i < reloc_count; ++i, prelocs += reloc_size) | |
cf43a2fe | 1826 | { |
c9269dff AM |
1827 | Reltype reloc(prelocs); |
1828 | typename elfcpp::Elf_types<size>::Elf_WXword r_info | |
1829 | = reloc.get_r_info(); | |
1830 | unsigned int r_type = elfcpp::elf_r_type<size>(r_info); | |
1831 | if (r_type == elfcpp::R_PPC64_ADDR64) | |
1832 | { | |
1833 | unsigned int r_sym = elfcpp::elf_r_sym<size>(r_info); | |
1834 | typename elfcpp::Elf_types<size>::Elf_Addr value; | |
1835 | bool is_ordinary; | |
1836 | unsigned int shndx; | |
1837 | if (r_sym < this->local_symbol_count()) | |
1838 | { | |
1839 | typename elfcpp::Sym<size, big_endian> | |
1840 | lsym(plocal_syms + r_sym * sym_size); | |
1841 | shndx = lsym.get_st_shndx(); | |
1842 | shndx = this->adjust_sym_shndx(r_sym, shndx, &is_ordinary); | |
1843 | value = lsym.get_st_value(); | |
1844 | } | |
1845 | else | |
1846 | shndx = this->symbol_section_and_value(r_sym, &value, | |
1847 | &is_ordinary); | |
1848 | this->set_opd_ent(reloc.get_r_offset(), shndx, | |
1849 | value + reloc.get_r_addend()); | |
ec4dbad3 AM |
1850 | if (i == 2) |
1851 | { | |
1852 | expected_off = reloc.get_r_offset(); | |
1853 | opd_ent_size = expected_off; | |
1854 | } | |
1855 | else if (expected_off != reloc.get_r_offset()) | |
1856 | regular = false; | |
1857 | expected_off += opd_ent_size; | |
1858 | } | |
1859 | else if (r_type == elfcpp::R_PPC64_TOC) | |
1860 | { | |
1861 | if (expected_off - opd_ent_size + 8 != reloc.get_r_offset()) | |
1862 | regular = false; | |
1863 | } | |
1864 | else | |
1865 | { | |
1866 | gold_warning(_("%s: unexpected reloc type %u in .opd section"), | |
1867 | this->name().c_str(), r_type); | |
1868 | regular = false; | |
c9269dff AM |
1869 | } |
1870 | } | |
ec4dbad3 AM |
1871 | if (reloc_count <= 2) |
1872 | opd_ent_size = this->section_size(this->opd_shndx()); | |
1873 | if (opd_ent_size != 24 && opd_ent_size != 16) | |
1874 | regular = false; | |
1875 | if (!regular) | |
1876 | { | |
1877 | gold_warning(_("%s: .opd is not a regular array of opd entries"), | |
1878 | this->name().c_str()); | |
1879 | opd_ent_size = 0; | |
1880 | } | |
c9269dff AM |
1881 | } |
1882 | } | |
1883 | ||
1884 | template<int size, bool big_endian> | |
1885 | void | |
1886 | Powerpc_relobj<size, big_endian>::do_read_relocs(Read_relocs_data* rd) | |
1887 | { | |
1888 | Sized_relobj_file<size, big_endian>::do_read_relocs(rd); | |
1889 | if (size == 64) | |
1890 | { | |
1891 | for (Read_relocs_data::Relocs_list::iterator p = rd->relocs.begin(); | |
1892 | p != rd->relocs.end(); | |
1893 | ++p) | |
1894 | { | |
1895 | if (p->data_shndx == this->opd_shndx()) | |
1896 | { | |
ec4dbad3 AM |
1897 | uint64_t opd_size = this->section_size(this->opd_shndx()); |
1898 | gold_assert(opd_size == static_cast<size_t>(opd_size)); | |
1899 | if (opd_size != 0) | |
1900 | { | |
1901 | this->init_opd(opd_size); | |
1902 | this->scan_opd_relocs(p->reloc_count, p->contents->data(), | |
1903 | rd->local_symbols->data()); | |
1904 | } | |
c9269dff AM |
1905 | break; |
1906 | } | |
cf43a2fe AM |
1907 | } |
1908 | } | |
cf43a2fe AM |
1909 | } |
1910 | ||
b4f7960d AM |
1911 | // Read the symbols then set up st_other vector. |
1912 | ||
1913 | template<int size, bool big_endian> | |
1914 | void | |
1915 | Powerpc_relobj<size, big_endian>::do_read_symbols(Read_symbols_data* sd) | |
1916 | { | |
f35c4853 | 1917 | this->base_read_symbols(sd); |
b4f7960d AM |
1918 | if (size == 64) |
1919 | { | |
1920 | const int shdr_size = elfcpp::Elf_sizes<size>::shdr_size; | |
1921 | const unsigned char* const pshdrs = sd->section_headers->data(); | |
1922 | const unsigned int loccount = this->do_local_symbol_count(); | |
1923 | if (loccount != 0) | |
1924 | { | |
1925 | this->st_other_.resize(loccount); | |
1926 | const int sym_size = elfcpp::Elf_sizes<size>::sym_size; | |
1927 | off_t locsize = loccount * sym_size; | |
1928 | const unsigned int symtab_shndx = this->symtab_shndx(); | |
1929 | const unsigned char *psymtab = pshdrs + symtab_shndx * shdr_size; | |
1930 | typename elfcpp::Shdr<size, big_endian> shdr(psymtab); | |
1931 | const unsigned char* psyms = this->get_view(shdr.get_sh_offset(), | |
1932 | locsize, true, false); | |
1933 | psyms += sym_size; | |
1934 | for (unsigned int i = 1; i < loccount; ++i, psyms += sym_size) | |
1935 | { | |
1936 | elfcpp::Sym<size, big_endian> sym(psyms); | |
1937 | unsigned char st_other = sym.get_st_other(); | |
1938 | this->st_other_[i] = st_other; | |
1939 | if ((st_other & elfcpp::STO_PPC64_LOCAL_MASK) != 0) | |
1940 | { | |
1941 | if (this->abiversion() == 0) | |
1942 | this->set_abiversion(2); | |
1943 | else if (this->abiversion() < 2) | |
1944 | gold_error(_("%s: local symbol %d has invalid st_other" | |
1945 | " for ABI version 1"), | |
1946 | this->name().c_str(), i); | |
1947 | } | |
1948 | } | |
1949 | } | |
1950 | } | |
1951 | } | |
1952 | ||
1953 | template<int size, bool big_endian> | |
1954 | void | |
1955 | Powerpc_dynobj<size, big_endian>::set_abiversion(int ver) | |
1956 | { | |
1957 | this->e_flags_ |= ver; | |
1958 | if (this->abiversion() != 0) | |
1959 | { | |
1960 | Target_powerpc<size, big_endian>* target = | |
1961 | static_cast<Target_powerpc<size, big_endian>*>( | |
1962 | parameters->sized_target<size, big_endian>()); | |
1963 | if (target->abiversion() == 0) | |
1964 | target->set_abiversion(this->abiversion()); | |
1965 | else if (target->abiversion() != this->abiversion()) | |
1966 | gold_error(_("%s: ABI version %d is not compatible " | |
1967 | "with ABI version %d output"), | |
1968 | this->name().c_str(), | |
1969 | this->abiversion(), target->abiversion()); | |
1970 | ||
1971 | } | |
1972 | } | |
1973 | ||
f35c4853 | 1974 | // Call Sized_dynobj::base_read_symbols to read the symbols then |
dc3714f3 AM |
1975 | // read .opd from a dynamic object, filling in opd_ent_ vector, |
1976 | ||
1977 | template<int size, bool big_endian> | |
1978 | void | |
1979 | Powerpc_dynobj<size, big_endian>::do_read_symbols(Read_symbols_data* sd) | |
1980 | { | |
f35c4853 | 1981 | this->base_read_symbols(sd); |
dc3714f3 AM |
1982 | if (size == 64) |
1983 | { | |
1984 | const int shdr_size = elfcpp::Elf_sizes<size>::shdr_size; | |
1985 | const unsigned char* const pshdrs = sd->section_headers->data(); | |
1986 | const unsigned char* namesu = sd->section_names->data(); | |
1987 | const char* names = reinterpret_cast<const char*>(namesu); | |
1988 | const unsigned char* s = NULL; | |
1989 | const unsigned char* opd; | |
1990 | section_size_type opd_size; | |
1991 | ||
1992 | // Find and read .opd section. | |
1993 | while (1) | |
1994 | { | |
1995 | s = this->template find_shdr<size, big_endian>(pshdrs, ".opd", names, | |
1996 | sd->section_names_size, | |
1997 | s); | |
1998 | if (s == NULL) | |
1999 | return; | |
2000 | ||
2001 | typename elfcpp::Shdr<size, big_endian> shdr(s); | |
2002 | if (shdr.get_sh_type() == elfcpp::SHT_PROGBITS | |
2003 | && (shdr.get_sh_flags() & elfcpp::SHF_ALLOC) != 0) | |
2004 | { | |
b4f7960d AM |
2005 | if (this->abiversion() == 0) |
2006 | this->set_abiversion(1); | |
2007 | else if (this->abiversion() > 1) | |
2008 | gold_error(_("%s: .opd invalid in abiv%d"), | |
2009 | this->name().c_str(), this->abiversion()); | |
2010 | ||
dc3714f3 AM |
2011 | this->opd_shndx_ = (s - pshdrs) / shdr_size; |
2012 | this->opd_address_ = shdr.get_sh_addr(); | |
2013 | opd_size = convert_to_section_size_type(shdr.get_sh_size()); | |
2014 | opd = this->get_view(shdr.get_sh_offset(), opd_size, | |
2015 | true, false); | |
2016 | break; | |
2017 | } | |
2018 | } | |
2019 | ||
2020 | // Build set of executable sections. | |
2021 | // Using a set is probably overkill. There is likely to be only | |
2022 | // a few executable sections, typically .init, .text and .fini, | |
2023 | // and they are generally grouped together. | |
2024 | typedef std::set<Sec_info> Exec_sections; | |
2025 | Exec_sections exec_sections; | |
2026 | s = pshdrs; | |
2027 | for (unsigned int i = 1; i < this->shnum(); ++i, s += shdr_size) | |
2028 | { | |
2029 | typename elfcpp::Shdr<size, big_endian> shdr(s); | |
2030 | if (shdr.get_sh_type() == elfcpp::SHT_PROGBITS | |
2031 | && ((shdr.get_sh_flags() | |
2032 | & (elfcpp::SHF_ALLOC | elfcpp::SHF_EXECINSTR)) | |
2033 | == (elfcpp::SHF_ALLOC | elfcpp::SHF_EXECINSTR)) | |
2034 | && shdr.get_sh_size() != 0) | |
2035 | { | |
2036 | exec_sections.insert(Sec_info(shdr.get_sh_addr(), | |
2037 | shdr.get_sh_size(), i)); | |
2038 | } | |
2039 | } | |
2040 | if (exec_sections.empty()) | |
2041 | return; | |
2042 | ||
2043 | // Look over the OPD entries. This is complicated by the fact | |
2044 | // that some binaries will use two-word entries while others | |
2045 | // will use the standard three-word entries. In most cases | |
2046 | // the third word (the environment pointer for languages like | |
2047 | // Pascal) is unused and will be zero. If the third word is | |
2048 | // used it should not be pointing into executable sections, | |
2049 | // I think. | |
2050 | this->init_opd(opd_size); | |
2051 | for (const unsigned char* p = opd; p < opd + opd_size; p += 8) | |
2052 | { | |
2053 | typedef typename elfcpp::Swap<64, big_endian>::Valtype Valtype; | |
2054 | const Valtype* valp = reinterpret_cast<const Valtype*>(p); | |
2055 | Valtype val = elfcpp::Swap<64, big_endian>::readval(valp); | |
2056 | if (val == 0) | |
2057 | // Chances are that this is the third word of an OPD entry. | |
2058 | continue; | |
2059 | typename Exec_sections::const_iterator e | |
2060 | = exec_sections.upper_bound(Sec_info(val, 0, 0)); | |
2061 | if (e != exec_sections.begin()) | |
2062 | { | |
2063 | --e; | |
2064 | if (e->start <= val && val < e->start + e->len) | |
2065 | { | |
2066 | // We have an address in an executable section. | |
2067 | // VAL ought to be the function entry, set it up. | |
2068 | this->set_opd_ent(p - opd, e->shndx, val); | |
2069 | // Skip second word of OPD entry, the TOC pointer. | |
2070 | p += 8; | |
2071 | } | |
2072 | } | |
2073 | // If we didn't match any executable sections, we likely | |
2074 | // have a non-zero third word in the OPD entry. | |
2075 | } | |
2076 | } | |
2077 | } | |
2078 | ||
f43ba157 | 2079 | // Set up some symbols. |
26a4e9cb AM |
2080 | |
2081 | template<int size, bool big_endian> | |
2082 | void | |
f43ba157 AM |
2083 | Target_powerpc<size, big_endian>::do_define_standard_symbols( |
2084 | Symbol_table* symtab, | |
2085 | Layout* layout) | |
26a4e9cb AM |
2086 | { |
2087 | if (size == 32) | |
2088 | { | |
bb66a627 AM |
2089 | // Define _GLOBAL_OFFSET_TABLE_ to ensure it isn't seen as |
2090 | // undefined when scanning relocs (and thus requires | |
26a4e9cb AM |
2091 | // non-relative dynamic relocs). The proper value will be |
2092 | // updated later. | |
2093 | Symbol *gotsym = symtab->lookup("_GLOBAL_OFFSET_TABLE_", NULL); | |
2094 | if (gotsym != NULL && gotsym->is_undefined()) | |
2095 | { | |
2096 | Target_powerpc<size, big_endian>* target = | |
2097 | static_cast<Target_powerpc<size, big_endian>*>( | |
2098 | parameters->sized_target<size, big_endian>()); | |
2099 | Output_data_got_powerpc<size, big_endian>* got | |
2100 | = target->got_section(symtab, layout); | |
2101 | symtab->define_in_output_data("_GLOBAL_OFFSET_TABLE_", NULL, | |
2102 | Symbol_table::PREDEFINED, | |
2103 | got, 0, 0, | |
2104 | elfcpp::STT_OBJECT, | |
bb66a627 | 2105 | elfcpp::STB_LOCAL, |
26a4e9cb AM |
2106 | elfcpp::STV_HIDDEN, 0, |
2107 | false, false); | |
2108 | } | |
2109 | ||
2110 | // Define _SDA_BASE_ at the start of the .sdata section + 32768. | |
2111 | Symbol *sdasym = symtab->lookup("_SDA_BASE_", NULL); | |
2112 | if (sdasym != NULL && sdasym->is_undefined()) | |
2113 | { | |
2114 | Output_data_space* sdata = new Output_data_space(4, "** sdata"); | |
2115 | Output_section* os | |
2116 | = layout->add_output_section_data(".sdata", 0, | |
2117 | elfcpp::SHF_ALLOC | |
2118 | | elfcpp::SHF_WRITE, | |
2119 | sdata, ORDER_SMALL_DATA, false); | |
2120 | symtab->define_in_output_data("_SDA_BASE_", NULL, | |
2121 | Symbol_table::PREDEFINED, | |
2122 | os, 32768, 0, elfcpp::STT_OBJECT, | |
2123 | elfcpp::STB_LOCAL, elfcpp::STV_HIDDEN, | |
2124 | 0, false, false); | |
2125 | } | |
2126 | } | |
b4f7960d AM |
2127 | else |
2128 | { | |
2129 | // Define .TOC. as for 32-bit _GLOBAL_OFFSET_TABLE_ | |
2130 | Symbol *gotsym = symtab->lookup(".TOC.", NULL); | |
2131 | if (gotsym != NULL && gotsym->is_undefined()) | |
2132 | { | |
2133 | Target_powerpc<size, big_endian>* target = | |
2134 | static_cast<Target_powerpc<size, big_endian>*>( | |
2135 | parameters->sized_target<size, big_endian>()); | |
2136 | Output_data_got_powerpc<size, big_endian>* got | |
2137 | = target->got_section(symtab, layout); | |
2138 | symtab->define_in_output_data(".TOC.", NULL, | |
2139 | Symbol_table::PREDEFINED, | |
2140 | got, 0x8000, 0, | |
2141 | elfcpp::STT_OBJECT, | |
2142 | elfcpp::STB_LOCAL, | |
2143 | elfcpp::STV_HIDDEN, 0, | |
2144 | false, false); | |
2145 | } | |
2146 | } | |
26a4e9cb AM |
2147 | } |
2148 | ||
cf43a2fe AM |
2149 | // Set up PowerPC target specific relobj. |
2150 | ||
2151 | template<int size, bool big_endian> | |
2152 | Object* | |
2153 | Target_powerpc<size, big_endian>::do_make_elf_object( | |
2154 | const std::string& name, | |
2155 | Input_file* input_file, | |
2156 | off_t offset, const elfcpp::Ehdr<size, big_endian>& ehdr) | |
2157 | { | |
2158 | int et = ehdr.get_e_type(); | |
957564c9 AS |
2159 | // ET_EXEC files are valid input for --just-symbols/-R, |
2160 | // and we treat them as relocatable objects. | |
2161 | if (et == elfcpp::ET_REL | |
2162 | || (et == elfcpp::ET_EXEC && input_file->just_symbols())) | |
cf43a2fe AM |
2163 | { |
2164 | Powerpc_relobj<size, big_endian>* obj = | |
c9269dff | 2165 | new Powerpc_relobj<size, big_endian>(name, input_file, offset, ehdr); |
cf43a2fe AM |
2166 | obj->setup(); |
2167 | return obj; | |
2168 | } | |
2169 | else if (et == elfcpp::ET_DYN) | |
2170 | { | |
dc3714f3 AM |
2171 | Powerpc_dynobj<size, big_endian>* obj = |
2172 | new Powerpc_dynobj<size, big_endian>(name, input_file, offset, ehdr); | |
cf43a2fe AM |
2173 | obj->setup(); |
2174 | return obj; | |
2175 | } | |
2176 | else | |
2177 | { | |
c9269dff | 2178 | gold_error(_("%s: unsupported ELF file type %d"), name.c_str(), et); |
cf43a2fe AM |
2179 | return NULL; |
2180 | } | |
2181 | } | |
2182 | ||
2183 | template<int size, bool big_endian> | |
2184 | class Output_data_got_powerpc : public Output_data_got<size, big_endian> | |
2185 | { | |
2186 | public: | |
2187 | typedef typename elfcpp::Elf_types<size>::Elf_Addr Valtype; | |
2188 | typedef Output_data_reloc<elfcpp::SHT_RELA, true, size, big_endian> Rela_dyn; | |
2189 | ||
2190 | Output_data_got_powerpc(Symbol_table* symtab, Layout* layout) | |
2191 | : Output_data_got<size, big_endian>(), | |
2192 | symtab_(symtab), layout_(layout), | |
2193 | header_ent_cnt_(size == 32 ? 3 : 1), | |
2194 | header_index_(size == 32 ? 0x2000 : 0) | |
9e69ed50 | 2195 | { } |
cf43a2fe | 2196 | |
e84fe78f AM |
2197 | // Override all the Output_data_got methods we use so as to first call |
2198 | // reserve_ent(). | |
2199 | bool | |
2200 | add_global(Symbol* gsym, unsigned int got_type) | |
2201 | { | |
2202 | this->reserve_ent(); | |
2203 | return Output_data_got<size, big_endian>::add_global(gsym, got_type); | |
2204 | } | |
2205 | ||
2206 | bool | |
2207 | add_global_plt(Symbol* gsym, unsigned int got_type) | |
2208 | { | |
2209 | this->reserve_ent(); | |
2210 | return Output_data_got<size, big_endian>::add_global_plt(gsym, got_type); | |
2211 | } | |
2212 | ||
2213 | bool | |
2214 | add_global_tls(Symbol* gsym, unsigned int got_type) | |
2215 | { return this->add_global_plt(gsym, got_type); } | |
2216 | ||
2217 | void | |
2218 | add_global_with_rel(Symbol* gsym, unsigned int got_type, | |
2219 | Output_data_reloc_generic* rel_dyn, unsigned int r_type) | |
2220 | { | |
2221 | this->reserve_ent(); | |
2222 | Output_data_got<size, big_endian>:: | |
2223 | add_global_with_rel(gsym, got_type, rel_dyn, r_type); | |
2224 | } | |
2225 | ||
2226 | void | |
2227 | add_global_pair_with_rel(Symbol* gsym, unsigned int got_type, | |
2228 | Output_data_reloc_generic* rel_dyn, | |
2229 | unsigned int r_type_1, unsigned int r_type_2) | |
2230 | { | |
2231 | this->reserve_ent(2); | |
2232 | Output_data_got<size, big_endian>:: | |
2233 | add_global_pair_with_rel(gsym, got_type, rel_dyn, r_type_1, r_type_2); | |
2234 | } | |
2235 | ||
2236 | bool | |
2237 | add_local(Relobj* object, unsigned int sym_index, unsigned int got_type) | |
2238 | { | |
2239 | this->reserve_ent(); | |
2240 | return Output_data_got<size, big_endian>::add_local(object, sym_index, | |
2241 | got_type); | |
2242 | } | |
2243 | ||
2244 | bool | |
2245 | add_local_plt(Relobj* object, unsigned int sym_index, unsigned int got_type) | |
2246 | { | |
2247 | this->reserve_ent(); | |
2248 | return Output_data_got<size, big_endian>::add_local_plt(object, sym_index, | |
2249 | got_type); | |
2250 | } | |
2251 | ||
2252 | bool | |
2253 | add_local_tls(Relobj* object, unsigned int sym_index, unsigned int got_type) | |
2254 | { return this->add_local_plt(object, sym_index, got_type); } | |
2255 | ||
2256 | void | |
2257 | add_local_tls_pair(Relobj* object, unsigned int sym_index, | |
2258 | unsigned int got_type, | |
2259 | Output_data_reloc_generic* rel_dyn, | |
2260 | unsigned int r_type) | |
2261 | { | |
2262 | this->reserve_ent(2); | |
2263 | Output_data_got<size, big_endian>:: | |
2264 | add_local_tls_pair(object, sym_index, got_type, rel_dyn, r_type); | |
2265 | } | |
2266 | ||
2267 | unsigned int | |
2268 | add_constant(Valtype constant) | |
2269 | { | |
2270 | this->reserve_ent(); | |
2271 | return Output_data_got<size, big_endian>::add_constant(constant); | |
2272 | } | |
2273 | ||
dd93cd0a AM |
2274 | unsigned int |
2275 | add_constant_pair(Valtype c1, Valtype c2) | |
2276 | { | |
2277 | this->reserve_ent(2); | |
e84fe78f | 2278 | return Output_data_got<size, big_endian>::add_constant_pair(c1, c2); |
dd93cd0a AM |
2279 | } |
2280 | ||
2281 | // Offset of _GLOBAL_OFFSET_TABLE_. | |
cf43a2fe AM |
2282 | unsigned int |
2283 | g_o_t() const | |
2284 | { | |
2285 | return this->got_offset(this->header_index_); | |
42cacb20 | 2286 | } |
cf43a2fe | 2287 | |
dd93cd0a AM |
2288 | // Offset of base used to access the GOT/TOC. |
2289 | // The got/toc pointer reg will be set to this value. | |
26a4e9cb | 2290 | Valtype |
dd93cd0a AM |
2291 | got_base_offset(const Powerpc_relobj<size, big_endian>* object) const |
2292 | { | |
2293 | if (size == 32) | |
2294 | return this->g_o_t(); | |
2295 | else | |
2296 | return (this->output_section()->address() | |
2297 | + object->toc_base_offset() | |
2298 | - this->address()); | |
2299 | } | |
2300 | ||
cf43a2fe AM |
2301 | // Ensure our GOT has a header. |
2302 | void | |
2303 | set_final_data_size() | |
2304 | { | |
2305 | if (this->header_ent_cnt_ != 0) | |
2306 | this->make_header(); | |
2307 | Output_data_got<size, big_endian>::set_final_data_size(); | |
2308 | } | |
2309 | ||
2310 | // First word of GOT header needs some values that are not | |
2311 | // handled by Output_data_got so poke them in here. | |
2312 | // For 32-bit, address of .dynamic, for 64-bit, address of TOCbase. | |
2313 | void | |
2314 | do_write(Output_file* of) | |
2315 | { | |
c9824451 AM |
2316 | Valtype val = 0; |
2317 | if (size == 32 && this->layout_->dynamic_data() != NULL) | |
2318 | val = this->layout_->dynamic_section()->address(); | |
2319 | if (size == 64) | |
2320 | val = this->output_section()->address() + 0x8000; | |
2321 | this->replace_constant(this->header_index_, val); | |
cf43a2fe AM |
2322 | Output_data_got<size, big_endian>::do_write(of); |
2323 | } | |
2324 | ||
2325 | private: | |
2326 | void | |
2327 | reserve_ent(unsigned int cnt = 1) | |
2328 | { | |
2329 | if (this->header_ent_cnt_ == 0) | |
2330 | return; | |
2331 | if (this->num_entries() + cnt > this->header_index_) | |
2332 | this->make_header(); | |
2333 | } | |
2334 | ||
2335 | void | |
2336 | make_header() | |
2337 | { | |
2338 | this->header_ent_cnt_ = 0; | |
2339 | this->header_index_ = this->num_entries(); | |
2340 | if (size == 32) | |
2341 | { | |
2342 | Output_data_got<size, big_endian>::add_constant(0); | |
2343 | Output_data_got<size, big_endian>::add_constant(0); | |
2344 | Output_data_got<size, big_endian>::add_constant(0); | |
2345 | ||
2346 | // Define _GLOBAL_OFFSET_TABLE_ at the header | |
bb66a627 AM |
2347 | Symbol *gotsym = this->symtab_->lookup("_GLOBAL_OFFSET_TABLE_", NULL); |
2348 | if (gotsym != NULL) | |
2349 | { | |
2350 | Sized_symbol<size>* sym = static_cast<Sized_symbol<size>*>(gotsym); | |
2351 | sym->set_value(this->g_o_t()); | |
2352 | } | |
2353 | else | |
2354 | this->symtab_->define_in_output_data("_GLOBAL_OFFSET_TABLE_", NULL, | |
2355 | Symbol_table::PREDEFINED, | |
2356 | this, this->g_o_t(), 0, | |
2357 | elfcpp::STT_OBJECT, | |
2358 | elfcpp::STB_LOCAL, | |
2359 | elfcpp::STV_HIDDEN, 0, | |
2360 | false, false); | |
cf43a2fe AM |
2361 | } |
2362 | else | |
2363 | Output_data_got<size, big_endian>::add_constant(0); | |
2364 | } | |
2365 | ||
2366 | // Stashed pointers. | |
2367 | Symbol_table* symtab_; | |
2368 | Layout* layout_; | |
2369 | ||
2370 | // GOT header size. | |
2371 | unsigned int header_ent_cnt_; | |
2372 | // GOT header index. | |
2373 | unsigned int header_index_; | |
42cacb20 DE |
2374 | }; |
2375 | ||
2376 | // Get the GOT section, creating it if necessary. | |
2377 | ||
2378 | template<int size, bool big_endian> | |
cf43a2fe | 2379 | Output_data_got_powerpc<size, big_endian>* |
42cacb20 DE |
2380 | Target_powerpc<size, big_endian>::got_section(Symbol_table* symtab, |
2381 | Layout* layout) | |
2382 | { | |
2383 | if (this->got_ == NULL) | |
2384 | { | |
2385 | gold_assert(symtab != NULL && layout != NULL); | |
2386 | ||
cf43a2fe AM |
2387 | this->got_ |
2388 | = new Output_data_got_powerpc<size, big_endian>(symtab, layout); | |
42cacb20 DE |
2389 | |
2390 | layout->add_output_section_data(".got", elfcpp::SHT_PROGBITS, | |
2391 | elfcpp::SHF_ALLOC | elfcpp::SHF_WRITE, | |
22f0da72 | 2392 | this->got_, ORDER_DATA, false); |
42cacb20 DE |
2393 | } |
2394 | ||
2395 | return this->got_; | |
2396 | } | |
2397 | ||
2398 | // Get the dynamic reloc section, creating it if necessary. | |
2399 | ||
2400 | template<int size, bool big_endian> | |
2401 | typename Target_powerpc<size, big_endian>::Reloc_section* | |
2402 | Target_powerpc<size, big_endian>::rela_dyn_section(Layout* layout) | |
2403 | { | |
2404 | if (this->rela_dyn_ == NULL) | |
2405 | { | |
2406 | gold_assert(layout != NULL); | |
2407 | this->rela_dyn_ = new Reloc_section(parameters->options().combreloc()); | |
2408 | layout->add_output_section_data(".rela.dyn", elfcpp::SHT_RELA, | |
22f0da72 ILT |
2409 | elfcpp::SHF_ALLOC, this->rela_dyn_, |
2410 | ORDER_DYNAMIC_RELOCS, false); | |
42cacb20 DE |
2411 | } |
2412 | return this->rela_dyn_; | |
2413 | } | |
2414 | ||
b3ccdeb5 AM |
2415 | // Similarly, but for ifunc symbols get the one for ifunc. |
2416 | ||
2417 | template<int size, bool big_endian> | |
2418 | typename Target_powerpc<size, big_endian>::Reloc_section* | |
2419 | Target_powerpc<size, big_endian>::rela_dyn_section(Symbol_table* symtab, | |
2420 | Layout* layout, | |
2421 | bool for_ifunc) | |
2422 | { | |
2423 | if (!for_ifunc) | |
2424 | return this->rela_dyn_section(layout); | |
2425 | ||
2426 | if (this->iplt_ == NULL) | |
2427 | this->make_iplt_section(symtab, layout); | |
2428 | return this->iplt_->rel_plt(); | |
2429 | } | |
2430 | ||
ec661b9d AM |
2431 | class Stub_control |
2432 | { | |
2433 | public: | |
2434 | // Determine the stub group size. The group size is the absolute | |
2435 | // value of the parameter --stub-group-size. If --stub-group-size | |
2436 | // is passed a negative value, we restrict stubs to be always before | |
2437 | // the stubbed branches. | |
a3e60ddb | 2438 | Stub_control(int32_t size, bool no_size_errors) |
ec661b9d | 2439 | : state_(NO_GROUP), stub_group_size_(abs(size)), |
0cfb0717 | 2440 | stub14_group_size_(abs(size) >> 10), |
a3e60ddb AM |
2441 | stubs_always_before_branch_(size < 0), |
2442 | suppress_size_errors_(no_size_errors), | |
ec661b9d AM |
2443 | group_end_addr_(0), owner_(NULL), output_section_(NULL) |
2444 | { | |
ec661b9d AM |
2445 | } |
2446 | ||
2447 | // Return true iff input section can be handled by current stub | |
2448 | // group. | |
2449 | bool | |
2450 | can_add_to_stub_group(Output_section* o, | |
2451 | const Output_section::Input_section* i, | |
2452 | bool has14); | |
2453 | ||
2454 | const Output_section::Input_section* | |
2455 | owner() | |
2456 | { return owner_; } | |
2457 | ||
2458 | Output_section* | |
2459 | output_section() | |
2460 | { return output_section_; } | |
2461 | ||
a20605cf AM |
2462 | void |
2463 | set_output_and_owner(Output_section* o, | |
2464 | const Output_section::Input_section* i) | |
2465 | { | |
2466 | this->output_section_ = o; | |
2467 | this->owner_ = i; | |
2468 | } | |
2469 | ||
ec661b9d AM |
2470 | private: |
2471 | typedef enum | |
2472 | { | |
2473 | NO_GROUP, | |
2474 | FINDING_STUB_SECTION, | |
2475 | HAS_STUB_SECTION | |
2476 | } State; | |
2477 | ||
2478 | State state_; | |
2479 | uint32_t stub_group_size_; | |
2480 | uint32_t stub14_group_size_; | |
2481 | bool stubs_always_before_branch_; | |
2482 | bool suppress_size_errors_; | |
2483 | uint64_t group_end_addr_; | |
2484 | const Output_section::Input_section* owner_; | |
2485 | Output_section* output_section_; | |
2486 | }; | |
2487 | ||
0cfdc767 | 2488 | // Return true iff input section can be handled by current stub |
ec661b9d AM |
2489 | // group. |
2490 | ||
2491 | bool | |
2492 | Stub_control::can_add_to_stub_group(Output_section* o, | |
2493 | const Output_section::Input_section* i, | |
2494 | bool has14) | |
2495 | { | |
2496 | uint32_t group_size | |
2497 | = has14 ? this->stub14_group_size_ : this->stub_group_size_; | |
2498 | bool whole_sec = o->order() == ORDER_INIT || o->order() == ORDER_FINI; | |
2499 | uint64_t this_size; | |
2500 | uint64_t start_addr = o->address(); | |
2501 | ||
2502 | if (whole_sec) | |
2503 | // .init and .fini sections are pasted together to form a single | |
2504 | // function. We can't be adding stubs in the middle of the function. | |
2505 | this_size = o->data_size(); | |
2506 | else | |
2507 | { | |
2508 | start_addr += i->relobj()->output_section_offset(i->shndx()); | |
2509 | this_size = i->data_size(); | |
2510 | } | |
2511 | uint64_t end_addr = start_addr + this_size; | |
2512 | bool toobig = this_size > group_size; | |
2513 | ||
2514 | if (toobig && !this->suppress_size_errors_) | |
2515 | gold_warning(_("%s:%s exceeds group size"), | |
2516 | i->relobj()->name().c_str(), | |
2517 | i->relobj()->section_name(i->shndx()).c_str()); | |
2518 | ||
2519 | if (this->state_ != HAS_STUB_SECTION | |
0cfdc767 AM |
2520 | && (!whole_sec || this->output_section_ != o) |
2521 | && (this->state_ == NO_GROUP | |
2522 | || this->group_end_addr_ - end_addr < group_size)) | |
ec661b9d AM |
2523 | { |
2524 | this->owner_ = i; | |
2525 | this->output_section_ = o; | |
2526 | } | |
2527 | ||
2528 | if (this->state_ == NO_GROUP) | |
2529 | { | |
2530 | this->state_ = FINDING_STUB_SECTION; | |
2531 | this->group_end_addr_ = end_addr; | |
2532 | } | |
2533 | else if (this->group_end_addr_ - start_addr < group_size) | |
2534 | ; | |
2535 | // Adding this section would make the group larger than GROUP_SIZE. | |
2536 | else if (this->state_ == FINDING_STUB_SECTION | |
2537 | && !this->stubs_always_before_branch_ | |
2538 | && !toobig) | |
2539 | { | |
2540 | // But wait, there's more! Input sections up to GROUP_SIZE | |
2541 | // bytes before the stub table can be handled by it too. | |
2542 | this->state_ = HAS_STUB_SECTION; | |
2543 | this->group_end_addr_ = end_addr; | |
2544 | } | |
2545 | else | |
2546 | { | |
2547 | this->state_ = NO_GROUP; | |
2548 | return false; | |
2549 | } | |
2550 | return true; | |
2551 | } | |
2552 | ||
2553 | // Look over all the input sections, deciding where to place stubs. | |
2554 | ||
2555 | template<int size, bool big_endian> | |
2556 | void | |
2557 | Target_powerpc<size, big_endian>::group_sections(Layout* layout, | |
a3e60ddb AM |
2558 | const Task*, |
2559 | bool no_size_errors) | |
ec661b9d | 2560 | { |
a3e60ddb | 2561 | Stub_control stub_control(this->stub_group_size_, no_size_errors); |
ec661b9d AM |
2562 | |
2563 | // Group input sections and insert stub table | |
a3e60ddb AM |
2564 | Stub_table_owner* table_owner = NULL; |
2565 | std::vector<Stub_table_owner*> tables; | |
ec661b9d AM |
2566 | Layout::Section_list section_list; |
2567 | layout->get_executable_sections(§ion_list); | |
2568 | std::stable_sort(section_list.begin(), section_list.end(), Sort_sections()); | |
2569 | for (Layout::Section_list::reverse_iterator o = section_list.rbegin(); | |
2570 | o != section_list.rend(); | |
2571 | ++o) | |
2572 | { | |
2573 | typedef Output_section::Input_section_list Input_section_list; | |
2574 | for (Input_section_list::const_reverse_iterator i | |
2575 | = (*o)->input_sections().rbegin(); | |
2576 | i != (*o)->input_sections().rend(); | |
2577 | ++i) | |
2578 | { | |
a3e60ddb AM |
2579 | if (i->is_input_section() |
2580 | || i->is_relaxed_input_section()) | |
ec661b9d AM |
2581 | { |
2582 | Powerpc_relobj<size, big_endian>* ppcobj = static_cast | |
2583 | <Powerpc_relobj<size, big_endian>*>(i->relobj()); | |
2584 | bool has14 = ppcobj->has_14bit_branch(i->shndx()); | |
2585 | if (!stub_control.can_add_to_stub_group(*o, &*i, has14)) | |
2586 | { | |
a3e60ddb AM |
2587 | table_owner->output_section = stub_control.output_section(); |
2588 | table_owner->owner = stub_control.owner(); | |
a20605cf | 2589 | stub_control.set_output_and_owner(*o, &*i); |
a3e60ddb | 2590 | table_owner = NULL; |
ec661b9d | 2591 | } |
a3e60ddb AM |
2592 | if (table_owner == NULL) |
2593 | { | |
2594 | table_owner = new Stub_table_owner; | |
2595 | tables.push_back(table_owner); | |
2596 | } | |
2597 | ppcobj->set_stub_table(i->shndx(), tables.size() - 1); | |
ec661b9d AM |
2598 | } |
2599 | } | |
2600 | } | |
a3e60ddb | 2601 | if (table_owner != NULL) |
0cfdc767 AM |
2602 | { |
2603 | const Output_section::Input_section* i = stub_control.owner(); | |
a3e60ddb AM |
2604 | |
2605 | if (tables.size() >= 2 && tables[tables.size() - 2]->owner == i) | |
0cfdc767 AM |
2606 | { |
2607 | // Corner case. A new stub group was made for the first | |
2608 | // section (last one looked at here) for some reason, but | |
2609 | // the first section is already being used as the owner for | |
2610 | // a stub table for following sections. Force it into that | |
2611 | // stub group. | |
a3e60ddb AM |
2612 | tables.pop_back(); |
2613 | delete table_owner; | |
0cfdc767 AM |
2614 | Powerpc_relobj<size, big_endian>* ppcobj = static_cast |
2615 | <Powerpc_relobj<size, big_endian>*>(i->relobj()); | |
a3e60ddb AM |
2616 | ppcobj->set_stub_table(i->shndx(), tables.size() - 1); |
2617 | } | |
2618 | else | |
2619 | { | |
2620 | table_owner->output_section = stub_control.output_section(); | |
2621 | table_owner->owner = i; | |
0cfdc767 | 2622 | } |
a3e60ddb AM |
2623 | } |
2624 | for (typename std::vector<Stub_table_owner*>::iterator t = tables.begin(); | |
2625 | t != tables.end(); | |
2626 | ++t) | |
2627 | { | |
2628 | Stub_table<size, big_endian>* stub_table; | |
2629 | ||
2630 | if ((*t)->owner->is_input_section()) | |
2631 | stub_table = new Stub_table<size, big_endian>(this, | |
2632 | (*t)->output_section, | |
2633 | (*t)->owner); | |
2634 | else if ((*t)->owner->is_relaxed_input_section()) | |
2635 | stub_table = static_cast<Stub_table<size, big_endian>*>( | |
2636 | (*t)->owner->relaxed_input_section()); | |
0cfdc767 | 2637 | else |
a3e60ddb AM |
2638 | gold_unreachable(); |
2639 | this->stub_tables_.push_back(stub_table); | |
2640 | delete *t; | |
0cfdc767 | 2641 | } |
ec661b9d AM |
2642 | } |
2643 | ||
a3e60ddb AM |
2644 | static unsigned long |
2645 | max_branch_delta (unsigned int r_type) | |
2646 | { | |
2647 | if (r_type == elfcpp::R_POWERPC_REL14 | |
2648 | || r_type == elfcpp::R_POWERPC_REL14_BRTAKEN | |
2649 | || r_type == elfcpp::R_POWERPC_REL14_BRNTAKEN) | |
2650 | return 1L << 15; | |
2651 | if (r_type == elfcpp::R_POWERPC_REL24 | |
2652 | || r_type == elfcpp::R_PPC_PLTREL24 | |
2653 | || r_type == elfcpp::R_PPC_LOCAL24PC) | |
2654 | return 1L << 25; | |
2655 | return 0; | |
2656 | } | |
2657 | ||
ec661b9d AM |
2658 | // If this branch needs a plt call stub, or a long branch stub, make one. |
2659 | ||
2660 | template<int size, bool big_endian> | |
a3e60ddb | 2661 | bool |
ec661b9d AM |
2662 | Target_powerpc<size, big_endian>::Branch_info::make_stub( |
2663 | Stub_table<size, big_endian>* stub_table, | |
2664 | Stub_table<size, big_endian>* ifunc_stub_table, | |
2665 | Symbol_table* symtab) const | |
2666 | { | |
2667 | Symbol* sym = this->object_->global_symbol(this->r_sym_); | |
2668 | if (sym != NULL && sym->is_forwarder()) | |
2669 | sym = symtab->resolve_forwards(sym); | |
2670 | const Sized_symbol<size>* gsym = static_cast<const Sized_symbol<size>*>(sym); | |
88b8e639 AM |
2671 | Target_powerpc<size, big_endian>* target = |
2672 | static_cast<Target_powerpc<size, big_endian>*>( | |
2673 | parameters->sized_target<size, big_endian>()); | |
ec661b9d | 2674 | if (gsym != NULL |
88b8e639 | 2675 | ? gsym->use_plt_offset(Scan::get_reference_flags(this->r_type_, target)) |
ec661b9d AM |
2676 | : this->object_->local_has_plt_offset(this->r_sym_)) |
2677 | { | |
9055360d AM |
2678 | if (size == 64 |
2679 | && gsym != NULL | |
2680 | && target->abiversion() >= 2 | |
2681 | && !parameters->options().output_is_position_independent() | |
2682 | && !is_branch_reloc(this->r_type_)) | |
2683 | target->glink_section()->add_global_entry(gsym); | |
2684 | else | |
ec661b9d | 2685 | { |
9055360d AM |
2686 | if (stub_table == NULL) |
2687 | stub_table = this->object_->stub_table(this->shndx_); | |
2688 | if (stub_table == NULL) | |
2689 | { | |
2690 | // This is a ref from a data section to an ifunc symbol. | |
2691 | stub_table = ifunc_stub_table; | |
2692 | } | |
2693 | gold_assert(stub_table != NULL); | |
a3e60ddb AM |
2694 | Address from = this->object_->get_output_section_offset(this->shndx_); |
2695 | if (from != invalid_address) | |
2696 | from += (this->object_->output_section(this->shndx_)->address() | |
2697 | + this->offset_); | |
9055360d | 2698 | if (gsym != NULL) |
a3e60ddb AM |
2699 | return stub_table->add_plt_call_entry(from, |
2700 | this->object_, gsym, | |
2701 | this->r_type_, this->addend_); | |
9055360d | 2702 | else |
a3e60ddb AM |
2703 | return stub_table->add_plt_call_entry(from, |
2704 | this->object_, this->r_sym_, | |
2705 | this->r_type_, this->addend_); | |
ec661b9d | 2706 | } |
ec661b9d AM |
2707 | } |
2708 | else | |
2709 | { | |
cbcb23fa | 2710 | Address max_branch_offset = max_branch_delta(this->r_type_); |
a3e60ddb AM |
2711 | if (max_branch_offset == 0) |
2712 | return true; | |
ec661b9d AM |
2713 | Address from = this->object_->get_output_section_offset(this->shndx_); |
2714 | gold_assert(from != invalid_address); | |
2715 | from += (this->object_->output_section(this->shndx_)->address() | |
2716 | + this->offset_); | |
2717 | Address to; | |
2718 | if (gsym != NULL) | |
2719 | { | |
2720 | switch (gsym->source()) | |
2721 | { | |
2722 | case Symbol::FROM_OBJECT: | |
2723 | { | |
2724 | Object* symobj = gsym->object(); | |
2725 | if (symobj->is_dynamic() | |
2726 | || symobj->pluginobj() != NULL) | |
a3e60ddb | 2727 | return true; |
ec661b9d AM |
2728 | bool is_ordinary; |
2729 | unsigned int shndx = gsym->shndx(&is_ordinary); | |
2730 | if (shndx == elfcpp::SHN_UNDEF) | |
a3e60ddb | 2731 | return true; |
ec661b9d AM |
2732 | } |
2733 | break; | |
2734 | ||
2735 | case Symbol::IS_UNDEFINED: | |
a3e60ddb | 2736 | return true; |
ec661b9d AM |
2737 | |
2738 | default: | |
2739 | break; | |
2740 | } | |
2741 | Symbol_table::Compute_final_value_status status; | |
2742 | to = symtab->compute_final_value<size>(gsym, &status); | |
2743 | if (status != Symbol_table::CFVS_OK) | |
a3e60ddb | 2744 | return true; |
9055360d AM |
2745 | if (size == 64) |
2746 | to += this->object_->ppc64_local_entry_offset(gsym); | |
ec661b9d AM |
2747 | } |
2748 | else | |
2749 | { | |
2750 | const Symbol_value<size>* psymval | |
2751 | = this->object_->local_symbol(this->r_sym_); | |
2752 | Symbol_value<size> symval; | |
2753 | typedef Sized_relobj_file<size, big_endian> ObjType; | |
2754 | typename ObjType::Compute_final_local_value_status status | |
2755 | = this->object_->compute_final_local_value(this->r_sym_, psymval, | |
2756 | &symval, symtab); | |
2757 | if (status != ObjType::CFLV_OK | |
2758 | || !symval.has_output_value()) | |
a3e60ddb | 2759 | return true; |
ec661b9d | 2760 | to = symval.value(this->object_, 0); |
9055360d AM |
2761 | if (size == 64) |
2762 | to += this->object_->ppc64_local_entry_offset(this->r_sym_); | |
ec661b9d | 2763 | } |
cbcb23fa AM |
2764 | if (!(size == 32 && this->r_type_ == elfcpp::R_PPC_PLTREL24)) |
2765 | to += this->addend_; | |
ec661b9d AM |
2766 | if (stub_table == NULL) |
2767 | stub_table = this->object_->stub_table(this->shndx_); | |
9055360d | 2768 | if (size == 64 && target->abiversion() < 2) |
ec661b9d AM |
2769 | { |
2770 | unsigned int dest_shndx; | |
1611bc4a AM |
2771 | if (!target->symval_for_branch(symtab, gsym, this->object_, |
2772 | &to, &dest_shndx)) | |
2773 | return true; | |
ec661b9d AM |
2774 | } |
2775 | Address delta = to - from; | |
2776 | if (delta + max_branch_offset >= 2 * max_branch_offset) | |
2777 | { | |
0cfdc767 AM |
2778 | if (stub_table == NULL) |
2779 | { | |
2780 | gold_warning(_("%s:%s: branch in non-executable section," | |
2781 | " no long branch stub for you"), | |
2782 | this->object_->name().c_str(), | |
2783 | this->object_->section_name(this->shndx_).c_str()); | |
a3e60ddb | 2784 | return true; |
0cfdc767 | 2785 | } |
d49044c7 AM |
2786 | bool save_res = (size == 64 |
2787 | && gsym != NULL | |
2788 | && gsym->source() == Symbol::IN_OUTPUT_DATA | |
2789 | && gsym->output_data() == target->savres_section()); | |
a3e60ddb | 2790 | return stub_table->add_long_branch_entry(this->object_, |
d49044c7 AM |
2791 | this->r_type_, |
2792 | from, to, save_res); | |
ec661b9d AM |
2793 | } |
2794 | } | |
a3e60ddb | 2795 | return true; |
ec661b9d AM |
2796 | } |
2797 | ||
2798 | // Relaxation hook. This is where we do stub generation. | |
2799 | ||
2800 | template<int size, bool big_endian> | |
2801 | bool | |
2802 | Target_powerpc<size, big_endian>::do_relax(int pass, | |
2803 | const Input_objects*, | |
2804 | Symbol_table* symtab, | |
2805 | Layout* layout, | |
2806 | const Task* task) | |
2807 | { | |
2808 | unsigned int prev_brlt_size = 0; | |
2809 | if (pass == 1) | |
ec661b9d | 2810 | { |
b4f7960d AM |
2811 | bool thread_safe |
2812 | = this->abiversion() < 2 && parameters->options().plt_thread_safe(); | |
2813 | if (size == 64 | |
2814 | && this->abiversion() < 2 | |
2815 | && !thread_safe | |
2816 | && !parameters->options().user_set_plt_thread_safe()) | |
ec661b9d | 2817 | { |
e2458743 | 2818 | static const char* const thread_starter[] = |
9e69ed50 AM |
2819 | { |
2820 | "pthread_create", | |
2821 | /* libstdc++ */ | |
2822 | "_ZNSt6thread15_M_start_threadESt10shared_ptrINS_10_Impl_baseEE", | |
2823 | /* librt */ | |
2824 | "aio_init", "aio_read", "aio_write", "aio_fsync", "lio_listio", | |
2825 | "mq_notify", "create_timer", | |
2826 | /* libanl */ | |
2827 | "getaddrinfo_a", | |
2828 | /* libgomp */ | |
80272b8c | 2829 | "GOMP_parallel", |
9e69ed50 | 2830 | "GOMP_parallel_start", |
80272b8c | 2831 | "GOMP_parallel_loop_static", |
9e69ed50 | 2832 | "GOMP_parallel_loop_static_start", |
80272b8c | 2833 | "GOMP_parallel_loop_dynamic", |
9e69ed50 | 2834 | "GOMP_parallel_loop_dynamic_start", |
80272b8c | 2835 | "GOMP_parallel_loop_guided", |
9e69ed50 | 2836 | "GOMP_parallel_loop_guided_start", |
80272b8c | 2837 | "GOMP_parallel_loop_runtime", |
9e69ed50 | 2838 | "GOMP_parallel_loop_runtime_start", |
80272b8c | 2839 | "GOMP_parallel_sections", |
43819297 | 2840 | "GOMP_parallel_sections_start", |
f9dffbf0 AM |
2841 | /* libgo */ |
2842 | "__go_go", | |
9e69ed50 AM |
2843 | }; |
2844 | ||
e2458743 AM |
2845 | if (parameters->options().shared()) |
2846 | thread_safe = true; | |
2847 | else | |
9e69ed50 | 2848 | { |
e2458743 AM |
2849 | for (unsigned int i = 0; |
2850 | i < sizeof(thread_starter) / sizeof(thread_starter[0]); | |
2851 | i++) | |
2852 | { | |
2853 | Symbol* sym = symtab->lookup(thread_starter[i], NULL); | |
2854 | thread_safe = (sym != NULL | |
2855 | && sym->in_reg() | |
2856 | && sym->in_real_elf()); | |
2857 | if (thread_safe) | |
2858 | break; | |
2859 | } | |
9e69ed50 | 2860 | } |
ec661b9d | 2861 | } |
9e69ed50 | 2862 | this->plt_thread_safe_ = thread_safe; |
a3e60ddb AM |
2863 | } |
2864 | ||
2865 | if (pass == 1) | |
2866 | { | |
2867 | this->stub_group_size_ = parameters->options().stub_group_size(); | |
2868 | bool no_size_errors = true; | |
2869 | if (this->stub_group_size_ == 1) | |
2870 | this->stub_group_size_ = 0x1c00000; | |
2871 | else if (this->stub_group_size_ == -1) | |
2872 | this->stub_group_size_ = -0x1e00000; | |
2873 | else | |
2874 | no_size_errors = false; | |
2875 | this->group_sections(layout, task, no_size_errors); | |
2876 | } | |
2877 | else if (this->relax_failed_ && this->relax_fail_count_ < 3) | |
2878 | { | |
2879 | this->branch_lookup_table_.clear(); | |
2880 | for (typename Stub_tables::iterator p = this->stub_tables_.begin(); | |
2881 | p != this->stub_tables_.end(); | |
2882 | ++p) | |
2883 | { | |
2884 | (*p)->clear_stubs(true); | |
2885 | } | |
2886 | this->stub_tables_.clear(); | |
2887 | this->stub_group_size_ = this->stub_group_size_ / 4 * 3; | |
2888 | gold_info(_("%s: stub group size is too large; retrying with %d"), | |
2889 | program_name, this->stub_group_size_); | |
2890 | this->group_sections(layout, task, true); | |
ec661b9d AM |
2891 | } |
2892 | ||
2893 | // We need address of stub tables valid for make_stub. | |
2894 | for (typename Stub_tables::iterator p = this->stub_tables_.begin(); | |
2895 | p != this->stub_tables_.end(); | |
2896 | ++p) | |
2897 | { | |
2898 | const Powerpc_relobj<size, big_endian>* object | |
2899 | = static_cast<const Powerpc_relobj<size, big_endian>*>((*p)->relobj()); | |
2900 | Address off = object->get_output_section_offset((*p)->shndx()); | |
2901 | gold_assert(off != invalid_address); | |
2902 | Output_section* os = (*p)->output_section(); | |
2903 | (*p)->set_address_and_size(os, off); | |
2904 | } | |
2905 | ||
9e69ed50 AM |
2906 | if (pass != 1) |
2907 | { | |
2908 | // Clear plt call stubs, long branch stubs and branch lookup table. | |
2909 | prev_brlt_size = this->branch_lookup_table_.size(); | |
2910 | this->branch_lookup_table_.clear(); | |
2911 | for (typename Stub_tables::iterator p = this->stub_tables_.begin(); | |
2912 | p != this->stub_tables_.end(); | |
2913 | ++p) | |
2914 | { | |
a3e60ddb | 2915 | (*p)->clear_stubs(false); |
9e69ed50 AM |
2916 | } |
2917 | } | |
2918 | ||
2919 | // Build all the stubs. | |
a3e60ddb | 2920 | this->relax_failed_ = false; |
ec661b9d AM |
2921 | Stub_table<size, big_endian>* ifunc_stub_table |
2922 | = this->stub_tables_.size() == 0 ? NULL : this->stub_tables_[0]; | |
2923 | Stub_table<size, big_endian>* one_stub_table | |
2924 | = this->stub_tables_.size() != 1 ? NULL : ifunc_stub_table; | |
2925 | for (typename Branches::const_iterator b = this->branch_info_.begin(); | |
2926 | b != this->branch_info_.end(); | |
2927 | b++) | |
2928 | { | |
a3e60ddb AM |
2929 | if (!b->make_stub(one_stub_table, ifunc_stub_table, symtab) |
2930 | && !this->relax_failed_) | |
2931 | { | |
2932 | this->relax_failed_ = true; | |
2933 | this->relax_fail_count_++; | |
2934 | if (this->relax_fail_count_ < 3) | |
2935 | return true; | |
2936 | } | |
ec661b9d AM |
2937 | } |
2938 | ||
9e69ed50 | 2939 | // Did anything change size? |
ec661b9d AM |
2940 | unsigned int num_huge_branches = this->branch_lookup_table_.size(); |
2941 | bool again = num_huge_branches != prev_brlt_size; | |
2942 | if (size == 64 && num_huge_branches != 0) | |
2943 | this->make_brlt_section(layout); | |
2944 | if (size == 64 && again) | |
2945 | this->brlt_section_->set_current_size(num_huge_branches); | |
2946 | ||
2947 | typedef Unordered_set<Output_section*> Output_sections; | |
2948 | Output_sections os_need_update; | |
2949 | for (typename Stub_tables::iterator p = this->stub_tables_.begin(); | |
2950 | p != this->stub_tables_.end(); | |
2951 | ++p) | |
2952 | { | |
2953 | if ((*p)->size_update()) | |
2954 | { | |
2955 | again = true; | |
9d5781f8 | 2956 | (*p)->add_eh_frame(layout); |
ec661b9d AM |
2957 | os_need_update.insert((*p)->output_section()); |
2958 | } | |
2959 | } | |
2960 | ||
9e69ed50 AM |
2961 | // Set output section offsets for all input sections in an output |
2962 | // section that just changed size. Anything past the stubs will | |
2963 | // need updating. | |
ec661b9d AM |
2964 | for (typename Output_sections::iterator p = os_need_update.begin(); |
2965 | p != os_need_update.end(); | |
2966 | p++) | |
2967 | { | |
2968 | Output_section* os = *p; | |
2969 | Address off = 0; | |
2970 | typedef Output_section::Input_section_list Input_section_list; | |
2971 | for (Input_section_list::const_iterator i = os->input_sections().begin(); | |
2972 | i != os->input_sections().end(); | |
2973 | ++i) | |
2974 | { | |
2975 | off = align_address(off, i->addralign()); | |
2976 | if (i->is_input_section() || i->is_relaxed_input_section()) | |
2977 | i->relobj()->set_section_offset(i->shndx(), off); | |
2978 | if (i->is_relaxed_input_section()) | |
2979 | { | |
2980 | Stub_table<size, big_endian>* stub_table | |
2981 | = static_cast<Stub_table<size, big_endian>*>( | |
2982 | i->relaxed_input_section()); | |
2983 | off += stub_table->set_address_and_size(os, off); | |
2984 | } | |
2985 | else | |
2986 | off += i->data_size(); | |
2987 | } | |
6830ee24 AM |
2988 | // If .branch_lt is part of this output section, then we have |
2989 | // just done the offset adjustment. | |
ec661b9d AM |
2990 | os->clear_section_offsets_need_adjustment(); |
2991 | } | |
2992 | ||
2993 | if (size == 64 | |
2994 | && !again | |
2995 | && num_huge_branches != 0 | |
2996 | && parameters->options().output_is_position_independent()) | |
2997 | { | |
2998 | // Fill in the BRLT relocs. | |
06f30c9d | 2999 | this->brlt_section_->reset_brlt_sizes(); |
ec661b9d AM |
3000 | for (typename Branch_lookup_table::const_iterator p |
3001 | = this->branch_lookup_table_.begin(); | |
3002 | p != this->branch_lookup_table_.end(); | |
3003 | ++p) | |
3004 | { | |
3005 | this->brlt_section_->add_reloc(p->first, p->second); | |
3006 | } | |
06f30c9d | 3007 | this->brlt_section_->finalize_brlt_sizes(); |
ec661b9d AM |
3008 | } |
3009 | return again; | |
3010 | } | |
3011 | ||
9d5781f8 AM |
3012 | template<int size, bool big_endian> |
3013 | void | |
3014 | Target_powerpc<size, big_endian>::do_plt_fde_location(const Output_data* plt, | |
3015 | unsigned char* oview, | |
3016 | uint64_t* paddress, | |
3017 | off_t* plen) const | |
3018 | { | |
3019 | uint64_t address = plt->address(); | |
3020 | off_t len = plt->data_size(); | |
3021 | ||
3022 | if (plt == this->glink_) | |
3023 | { | |
3024 | // See Output_data_glink::do_write() for glink contents. | |
5fe7ffdc AM |
3025 | if (len == 0) |
3026 | { | |
3027 | gold_assert(parameters->doing_static_link()); | |
3028 | // Static linking may need stubs, to support ifunc and long | |
3029 | // branches. We need to create an output section for | |
3030 | // .eh_frame early in the link process, to have a place to | |
3031 | // attach stub .eh_frame info. We also need to have | |
3032 | // registered a CIE that matches the stub CIE. Both of | |
3033 | // these requirements are satisfied by creating an FDE and | |
3034 | // CIE for .glink, even though static linking will leave | |
3035 | // .glink zero length. | |
3036 | // ??? Hopefully generating an FDE with a zero address range | |
3037 | // won't confuse anything that consumes .eh_frame info. | |
3038 | } | |
3039 | else if (size == 64) | |
9d5781f8 AM |
3040 | { |
3041 | // There is one word before __glink_PLTresolve | |
3042 | address += 8; | |
3043 | len -= 8; | |
3044 | } | |
3045 | else if (parameters->options().output_is_position_independent()) | |
3046 | { | |
3047 | // There are two FDEs for a position independent glink. | |
3048 | // The first covers the branch table, the second | |
3049 | // __glink_PLTresolve at the end of glink. | |
3050 | off_t resolve_size = this->glink_->pltresolve_size; | |
5fe7ffdc | 3051 | if (oview[9] == elfcpp::DW_CFA_nop) |
9d5781f8 AM |
3052 | len -= resolve_size; |
3053 | else | |
3054 | { | |
3055 | address += len - resolve_size; | |
3056 | len = resolve_size; | |
3057 | } | |
3058 | } | |
3059 | } | |
3060 | else | |
3061 | { | |
3062 | // Must be a stub table. | |
3063 | const Stub_table<size, big_endian>* stub_table | |
3064 | = static_cast<const Stub_table<size, big_endian>*>(plt); | |
3065 | uint64_t stub_address = stub_table->stub_address(); | |
3066 | len -= stub_address - address; | |
3067 | address = stub_address; | |
3068 | } | |
3069 | ||
3070 | *paddress = address; | |
3071 | *plen = len; | |
3072 | } | |
3073 | ||
42cacb20 DE |
3074 | // A class to handle the PLT data. |
3075 | ||
3076 | template<int size, bool big_endian> | |
cf43a2fe | 3077 | class Output_data_plt_powerpc : public Output_section_data_build |
42cacb20 DE |
3078 | { |
3079 | public: | |
3080 | typedef Output_data_reloc<elfcpp::SHT_RELA, true, | |
3081 | size, big_endian> Reloc_section; | |
3082 | ||
e5d5f5ed AM |
3083 | Output_data_plt_powerpc(Target_powerpc<size, big_endian>* targ, |
3084 | Reloc_section* plt_rel, | |
e5d5f5ed AM |
3085 | const char* name) |
3086 | : Output_section_data_build(size == 32 ? 4 : 8), | |
3087 | rel_(plt_rel), | |
3088 | targ_(targ), | |
e5d5f5ed AM |
3089 | name_(name) |
3090 | { } | |
42cacb20 DE |
3091 | |
3092 | // Add an entry to the PLT. | |
03e25981 | 3093 | void |
cf43a2fe | 3094 | add_entry(Symbol*); |
42cacb20 | 3095 | |
03e25981 | 3096 | void |
e5d5f5ed AM |
3097 | add_ifunc_entry(Symbol*); |
3098 | ||
03e25981 | 3099 | void |
e5d5f5ed AM |
3100 | add_local_ifunc_entry(Sized_relobj_file<size, big_endian>*, unsigned int); |
3101 | ||
42cacb20 | 3102 | // Return the .rela.plt section data. |
e5d5f5ed | 3103 | Reloc_section* |
cf43a2fe AM |
3104 | rel_plt() const |
3105 | { | |
42cacb20 DE |
3106 | return this->rel_; |
3107 | } | |
3108 | ||
0e70b911 CC |
3109 | // Return the number of PLT entries. |
3110 | unsigned int | |
3111 | entry_count() const | |
d83ce4e3 | 3112 | { |
b3ccdeb5 AM |
3113 | if (this->current_data_size() == 0) |
3114 | return 0; | |
b4f7960d AM |
3115 | return ((this->current_data_size() - this->first_plt_entry_offset()) |
3116 | / this->plt_entry_size()); | |
d83ce4e3 | 3117 | } |
0e70b911 | 3118 | |
42cacb20 | 3119 | protected: |
42cacb20 | 3120 | void |
cf43a2fe | 3121 | do_adjust_output_section(Output_section* os) |
42cacb20 | 3122 | { |
cf43a2fe | 3123 | os->set_entsize(0); |
42cacb20 DE |
3124 | } |
3125 | ||
6ce78956 AM |
3126 | // Write to a map file. |
3127 | void | |
3128 | do_print_to_mapfile(Mapfile* mapfile) const | |
e5d5f5ed | 3129 | { mapfile->print_output_data(this, this->name_); } |
6ce78956 | 3130 | |
cf43a2fe | 3131 | private: |
b4f7960d AM |
3132 | // Return the offset of the first non-reserved PLT entry. |
3133 | unsigned int | |
3134 | first_plt_entry_offset() const | |
3135 | { | |
3136 | // IPLT has no reserved entry. | |
3137 | if (this->name_[3] == 'I') | |
3138 | return 0; | |
3139 | return this->targ_->first_plt_entry_offset(); | |
3140 | } | |
3141 | ||
3142 | // Return the size of each PLT entry. | |
3143 | unsigned int | |
3144 | plt_entry_size() const | |
3145 | { | |
3146 | return this->targ_->plt_entry_size(); | |
3147 | } | |
cf43a2fe | 3148 | |
42cacb20 DE |
3149 | // Write out the PLT data. |
3150 | void | |
3151 | do_write(Output_file*); | |
3152 | ||
3153 | // The reloc section. | |
3154 | Reloc_section* rel_; | |
cf43a2fe AM |
3155 | // Allows access to .glink for do_write. |
3156 | Target_powerpc<size, big_endian>* targ_; | |
e5d5f5ed AM |
3157 | // What to report in map file. |
3158 | const char *name_; | |
42cacb20 DE |
3159 | }; |
3160 | ||
e5d5f5ed | 3161 | // Add an entry to the PLT. |
42cacb20 DE |
3162 | |
3163 | template<int size, bool big_endian> | |
03e25981 | 3164 | void |
e5d5f5ed | 3165 | Output_data_plt_powerpc<size, big_endian>::add_entry(Symbol* gsym) |
42cacb20 | 3166 | { |
e5d5f5ed AM |
3167 | if (!gsym->has_plt_offset()) |
3168 | { | |
ec661b9d | 3169 | section_size_type off = this->current_data_size(); |
e5d5f5ed AM |
3170 | if (off == 0) |
3171 | off += this->first_plt_entry_offset(); | |
3172 | gsym->set_plt_offset(off); | |
3173 | gsym->set_needs_dynsym_entry(); | |
3174 | unsigned int dynrel = elfcpp::R_POWERPC_JMP_SLOT; | |
3175 | this->rel_->add_global(gsym, dynrel, this, off, 0); | |
b4f7960d | 3176 | off += this->plt_entry_size(); |
e5d5f5ed AM |
3177 | this->set_current_data_size(off); |
3178 | } | |
42cacb20 DE |
3179 | } |
3180 | ||
e5d5f5ed | 3181 | // Add an entry for a global ifunc symbol that resolves locally, to the IPLT. |
42cacb20 DE |
3182 | |
3183 | template<int size, bool big_endian> | |
03e25981 | 3184 | void |
e5d5f5ed | 3185 | Output_data_plt_powerpc<size, big_endian>::add_ifunc_entry(Symbol* gsym) |
42cacb20 | 3186 | { |
cf43a2fe AM |
3187 | if (!gsym->has_plt_offset()) |
3188 | { | |
ec661b9d | 3189 | section_size_type off = this->current_data_size(); |
cf43a2fe | 3190 | gsym->set_plt_offset(off); |
e5d5f5ed | 3191 | unsigned int dynrel = elfcpp::R_POWERPC_IRELATIVE; |
b4f7960d | 3192 | if (size == 64 && this->targ_->abiversion() < 2) |
e5d5f5ed AM |
3193 | dynrel = elfcpp::R_PPC64_JMP_IREL; |
3194 | this->rel_->add_symbolless_global_addend(gsym, dynrel, this, off, 0); | |
b4f7960d | 3195 | off += this->plt_entry_size(); |
e5d5f5ed AM |
3196 | this->set_current_data_size(off); |
3197 | } | |
3198 | } | |
3199 | ||
3200 | // Add an entry for a local ifunc symbol to the IPLT. | |
3201 | ||
3202 | template<int size, bool big_endian> | |
03e25981 | 3203 | void |
e5d5f5ed AM |
3204 | Output_data_plt_powerpc<size, big_endian>::add_local_ifunc_entry( |
3205 | Sized_relobj_file<size, big_endian>* relobj, | |
3206 | unsigned int local_sym_index) | |
3207 | { | |
3208 | if (!relobj->local_has_plt_offset(local_sym_index)) | |
3209 | { | |
ec661b9d | 3210 | section_size_type off = this->current_data_size(); |
e5d5f5ed AM |
3211 | relobj->set_local_plt_offset(local_sym_index, off); |
3212 | unsigned int dynrel = elfcpp::R_POWERPC_IRELATIVE; | |
b4f7960d | 3213 | if (size == 64 && this->targ_->abiversion() < 2) |
e5d5f5ed AM |
3214 | dynrel = elfcpp::R_PPC64_JMP_IREL; |
3215 | this->rel_->add_symbolless_local_addend(relobj, local_sym_index, dynrel, | |
3216 | this, off, 0); | |
b4f7960d | 3217 | off += this->plt_entry_size(); |
cf43a2fe AM |
3218 | this->set_current_data_size(off); |
3219 | } | |
42cacb20 DE |
3220 | } |
3221 | ||
dd93cd0a | 3222 | static const uint32_t add_0_11_11 = 0x7c0b5a14; |
9e69ed50 | 3223 | static const uint32_t add_2_2_11 = 0x7c425a14; |
dd93cd0a AM |
3224 | static const uint32_t add_3_3_2 = 0x7c631214; |
3225 | static const uint32_t add_3_3_13 = 0x7c636a14; | |
3226 | static const uint32_t add_11_0_11 = 0x7d605a14; | |
b4f7960d AM |
3227 | static const uint32_t add_11_2_11 = 0x7d625a14; |
3228 | static const uint32_t add_11_11_2 = 0x7d6b1214; | |
3229 | static const uint32_t addi_0_12 = 0x380c0000; | |
dd93cd0a | 3230 | static const uint32_t addi_2_2 = 0x38420000; |
dd93cd0a | 3231 | static const uint32_t addi_3_3 = 0x38630000; |
b4f7960d | 3232 | static const uint32_t addi_11_11 = 0x396b0000; |
bbec1a5d | 3233 | static const uint32_t addi_12_1 = 0x39810000; |
b4f7960d | 3234 | static const uint32_t addi_12_12 = 0x398c0000; |
dd93cd0a AM |
3235 | static const uint32_t addis_0_2 = 0x3c020000; |
3236 | static const uint32_t addis_0_13 = 0x3c0d0000; | |
bbec1a5d | 3237 | static const uint32_t addis_2_12 = 0x3c4c0000; |
b4f7960d | 3238 | static const uint32_t addis_11_2 = 0x3d620000; |
c9269dff AM |
3239 | static const uint32_t addis_11_11 = 0x3d6b0000; |
3240 | static const uint32_t addis_11_30 = 0x3d7e0000; | |
bbec1a5d | 3241 | static const uint32_t addis_12_1 = 0x3d810000; |
397998fc | 3242 | static const uint32_t addis_12_2 = 0x3d820000; |
c9269dff | 3243 | static const uint32_t addis_12_12 = 0x3d8c0000; |
c9269dff AM |
3244 | static const uint32_t b = 0x48000000; |
3245 | static const uint32_t bcl_20_31 = 0x429f0005; | |
3246 | static const uint32_t bctr = 0x4e800420; | |
f3a0ed29 | 3247 | static const uint32_t blr = 0x4e800020; |
9e69ed50 | 3248 | static const uint32_t bnectr_p4 = 0x4ce20420; |
bbec1a5d | 3249 | static const uint32_t cmpld_7_12_0 = 0x7fac0040; |
9e69ed50 | 3250 | static const uint32_t cmpldi_2_0 = 0x28220000; |
dd93cd0a AM |
3251 | static const uint32_t cror_15_15_15 = 0x4def7b82; |
3252 | static const uint32_t cror_31_31_31 = 0x4ffffb82; | |
f3a0ed29 AM |
3253 | static const uint32_t ld_0_1 = 0xe8010000; |
3254 | static const uint32_t ld_0_12 = 0xe80c0000; | |
dd93cd0a | 3255 | static const uint32_t ld_2_1 = 0xe8410000; |
dd93cd0a | 3256 | static const uint32_t ld_2_2 = 0xe8420000; |
b4f7960d AM |
3257 | static const uint32_t ld_2_11 = 0xe84b0000; |
3258 | static const uint32_t ld_11_2 = 0xe9620000; | |
3259 | static const uint32_t ld_11_11 = 0xe96b0000; | |
3260 | static const uint32_t ld_12_2 = 0xe9820000; | |
3261 | static const uint32_t ld_12_11 = 0xe98b0000; | |
9055360d | 3262 | static const uint32_t ld_12_12 = 0xe98c0000; |
f3a0ed29 | 3263 | static const uint32_t lfd_0_1 = 0xc8010000; |
dd93cd0a | 3264 | static const uint32_t li_0_0 = 0x38000000; |
f3a0ed29 | 3265 | static const uint32_t li_12_0 = 0x39800000; |
bbec1a5d | 3266 | static const uint32_t lis_0 = 0x3c000000; |
c9269dff AM |
3267 | static const uint32_t lis_11 = 0x3d600000; |
3268 | static const uint32_t lis_12 = 0x3d800000; | |
b4f7960d | 3269 | static const uint32_t lvx_0_12_0 = 0x7c0c00ce; |
c9269dff AM |
3270 | static const uint32_t lwz_0_12 = 0x800c0000; |
3271 | static const uint32_t lwz_11_11 = 0x816b0000; | |
3272 | static const uint32_t lwz_11_30 = 0x817e0000; | |
3273 | static const uint32_t lwz_12_12 = 0x818c0000; | |
dd93cd0a | 3274 | static const uint32_t lwzu_0_12 = 0x840c0000; |
c9269dff | 3275 | static const uint32_t mflr_0 = 0x7c0802a6; |
dd93cd0a | 3276 | static const uint32_t mflr_11 = 0x7d6802a6; |
c9269dff AM |
3277 | static const uint32_t mflr_12 = 0x7d8802a6; |
3278 | static const uint32_t mtctr_0 = 0x7c0903a6; | |
3279 | static const uint32_t mtctr_11 = 0x7d6903a6; | |
ec661b9d | 3280 | static const uint32_t mtctr_12 = 0x7d8903a6; |
c9269dff | 3281 | static const uint32_t mtlr_0 = 0x7c0803a6; |
c9269dff | 3282 | static const uint32_t mtlr_12 = 0x7d8803a6; |
dd93cd0a | 3283 | static const uint32_t nop = 0x60000000; |
c9269dff | 3284 | static const uint32_t ori_0_0_0 = 0x60000000; |
b4f7960d | 3285 | static const uint32_t srdi_0_0_2 = 0x7800f082; |
f3a0ed29 AM |
3286 | static const uint32_t std_0_1 = 0xf8010000; |
3287 | static const uint32_t std_0_12 = 0xf80c0000; | |
dd93cd0a | 3288 | static const uint32_t std_2_1 = 0xf8410000; |
f3a0ed29 AM |
3289 | static const uint32_t stfd_0_1 = 0xd8010000; |
3290 | static const uint32_t stvx_0_12_0 = 0x7c0c01ce; | |
dd93cd0a | 3291 | static const uint32_t sub_11_11_12 = 0x7d6c5850; |
b4f7960d AM |
3292 | static const uint32_t sub_12_12_11 = 0x7d8b6050; |
3293 | static const uint32_t xor_2_12_12 = 0x7d826278; | |
3294 | static const uint32_t xor_11_12_12 = 0x7d8b6278; | |
42cacb20 DE |
3295 | |
3296 | // Write out the PLT. | |
3297 | ||
3298 | template<int size, bool big_endian> | |
3299 | void | |
3300 | Output_data_plt_powerpc<size, big_endian>::do_write(Output_file* of) | |
3301 | { | |
b3ccdeb5 | 3302 | if (size == 32 && this->name_[3] != 'I') |
cf43a2fe | 3303 | { |
ec661b9d | 3304 | const section_size_type offset = this->offset(); |
cf43a2fe AM |
3305 | const section_size_type oview_size |
3306 | = convert_to_section_size_type(this->data_size()); | |
3307 | unsigned char* const oview = of->get_output_view(offset, oview_size); | |
3308 | unsigned char* pov = oview; | |
3309 | unsigned char* endpov = oview + oview_size; | |
3310 | ||
e5d5f5ed | 3311 | // The address of the .glink branch table |
cf43a2fe AM |
3312 | const Output_data_glink<size, big_endian>* glink |
3313 | = this->targ_->glink_section(); | |
ec661b9d | 3314 | elfcpp::Elf_types<32>::Elf_Addr branch_tab = glink->address(); |
cf43a2fe AM |
3315 | |
3316 | while (pov < endpov) | |
3317 | { | |
3318 | elfcpp::Swap<32, big_endian>::writeval(pov, branch_tab); | |
3319 | pov += 4; | |
3320 | branch_tab += 4; | |
3321 | } | |
3322 | ||
3323 | of->write_output_view(offset, oview_size, oview); | |
3324 | } | |
3325 | } | |
3326 | ||
3327 | // Create the PLT section. | |
3328 | ||
3329 | template<int size, bool big_endian> | |
3330 | void | |
40b469d7 AM |
3331 | Target_powerpc<size, big_endian>::make_plt_section(Symbol_table* symtab, |
3332 | Layout* layout) | |
cf43a2fe AM |
3333 | { |
3334 | if (this->plt_ == NULL) | |
3335 | { | |
40b469d7 AM |
3336 | if (this->got_ == NULL) |
3337 | this->got_section(symtab, layout); | |
3338 | ||
cf43a2fe AM |
3339 | if (this->glink_ == NULL) |
3340 | make_glink_section(layout); | |
3341 | ||
3342 | // Ensure that .rela.dyn always appears before .rela.plt This is | |
3343 | // necessary due to how, on PowerPC and some other targets, .rela.dyn | |
b3ccdeb5 | 3344 | // needs to include .rela.plt in its range. |
cf43a2fe AM |
3345 | this->rela_dyn_section(layout); |
3346 | ||
e5d5f5ed AM |
3347 | Reloc_section* plt_rel = new Reloc_section(false); |
3348 | layout->add_output_section_data(".rela.plt", elfcpp::SHT_RELA, | |
3349 | elfcpp::SHF_ALLOC, plt_rel, | |
3350 | ORDER_DYNAMIC_PLT_RELOCS, false); | |
3351 | this->plt_ | |
3352 | = new Output_data_plt_powerpc<size, big_endian>(this, plt_rel, | |
e5d5f5ed | 3353 | "** PLT"); |
cf43a2fe AM |
3354 | layout->add_output_section_data(".plt", |
3355 | (size == 32 | |
3356 | ? elfcpp::SHT_PROGBITS | |
3357 | : elfcpp::SHT_NOBITS), | |
3358 | elfcpp::SHF_ALLOC | elfcpp::SHF_WRITE, | |
3359 | this->plt_, | |
3360 | (size == 32 | |
3361 | ? ORDER_SMALL_DATA | |
3362 | : ORDER_SMALL_BSS), | |
3363 | false); | |
3364 | } | |
3365 | } | |
3366 | ||
e5d5f5ed AM |
3367 | // Create the IPLT section. |
3368 | ||
3369 | template<int size, bool big_endian> | |
3370 | void | |
40b469d7 AM |
3371 | Target_powerpc<size, big_endian>::make_iplt_section(Symbol_table* symtab, |
3372 | Layout* layout) | |
e5d5f5ed AM |
3373 | { |
3374 | if (this->iplt_ == NULL) | |
3375 | { | |
40b469d7 | 3376 | this->make_plt_section(symtab, layout); |
e5d5f5ed AM |
3377 | |
3378 | Reloc_section* iplt_rel = new Reloc_section(false); | |
3379 | this->rela_dyn_->output_section()->add_output_section_data(iplt_rel); | |
3380 | this->iplt_ | |
3381 | = new Output_data_plt_powerpc<size, big_endian>(this, iplt_rel, | |
b4f7960d | 3382 | "** IPLT"); |
e5d5f5ed | 3383 | this->plt_->output_section()->add_output_section_data(this->iplt_); |
e5d5f5ed AM |
3384 | } |
3385 | } | |
3386 | ||
ec661b9d | 3387 | // A section for huge long branch addresses, similar to plt section. |
cf43a2fe AM |
3388 | |
3389 | template<int size, bool big_endian> | |
ec661b9d | 3390 | class Output_data_brlt_powerpc : public Output_section_data_build |
cf43a2fe AM |
3391 | { |
3392 | public: | |
ec661b9d AM |
3393 | typedef typename elfcpp::Elf_types<size>::Elf_Addr Address; |
3394 | typedef Output_data_reloc<elfcpp::SHT_RELA, true, | |
3395 | size, big_endian> Reloc_section; | |
c9269dff | 3396 | |
ec661b9d AM |
3397 | Output_data_brlt_powerpc(Target_powerpc<size, big_endian>* targ, |
3398 | Reloc_section* brlt_rel) | |
3399 | : Output_section_data_build(size == 32 ? 4 : 8), | |
3400 | rel_(brlt_rel), | |
3401 | targ_(targ) | |
3402 | { } | |
cf43a2fe | 3403 | |
06f30c9d CC |
3404 | void |
3405 | reset_brlt_sizes() | |
3406 | { | |
3407 | this->reset_data_size(); | |
3408 | this->rel_->reset_data_size(); | |
3409 | } | |
3410 | ||
3411 | void | |
3412 | finalize_brlt_sizes() | |
3413 | { | |
3414 | this->finalize_data_size(); | |
3415 | this->rel_->finalize_data_size(); | |
3416 | } | |
3417 | ||
ec661b9d | 3418 | // Add a reloc for an entry in the BRLT. |
cf43a2fe | 3419 | void |
ec661b9d AM |
3420 | add_reloc(Address to, unsigned int off) |
3421 | { this->rel_->add_relative(elfcpp::R_POWERPC_RELATIVE, this, off, to); } | |
e5d5f5ed | 3422 | |
ec661b9d | 3423 | // Update section and reloc section size. |
e5d5f5ed | 3424 | void |
ec661b9d AM |
3425 | set_current_size(unsigned int num_branches) |
3426 | { | |
3427 | this->reset_address_and_file_offset(); | |
3428 | this->set_current_data_size(num_branches * 16); | |
3429 | this->finalize_data_size(); | |
3430 | Output_section* os = this->output_section(); | |
3431 | os->set_section_offsets_need_adjustment(); | |
3432 | if (this->rel_ != NULL) | |
3433 | { | |
3434 | unsigned int reloc_size | |
3435 | = Reloc_types<elfcpp::SHT_RELA, size, big_endian>::reloc_size; | |
3436 | this->rel_->reset_address_and_file_offset(); | |
3437 | this->rel_->set_current_data_size(num_branches * reloc_size); | |
3438 | this->rel_->finalize_data_size(); | |
3439 | Output_section* os = this->rel_->output_section(); | |
3440 | os->set_section_offsets_need_adjustment(); | |
3441 | } | |
3442 | } | |
cf43a2fe | 3443 | |
ec661b9d AM |
3444 | protected: |
3445 | void | |
3446 | do_adjust_output_section(Output_section* os) | |
3447 | { | |
3448 | os->set_entsize(0); | |
3449 | } | |
e5d5f5ed | 3450 | |
ec661b9d AM |
3451 | // Write to a map file. |
3452 | void | |
3453 | do_print_to_mapfile(Mapfile* mapfile) const | |
3454 | { mapfile->print_output_data(this, "** BRLT"); } | |
c9824451 | 3455 | |
ec661b9d AM |
3456 | private: |
3457 | // Write out the BRLT data. | |
3458 | void | |
3459 | do_write(Output_file*); | |
c9824451 | 3460 | |
ec661b9d AM |
3461 | // The reloc section. |
3462 | Reloc_section* rel_; | |
3463 | Target_powerpc<size, big_endian>* targ_; | |
3464 | }; | |
cf43a2fe | 3465 | |
ec661b9d AM |
3466 | // Make the branch lookup table section. |
3467 | ||
3468 | template<int size, bool big_endian> | |
3469 | void | |
3470 | Target_powerpc<size, big_endian>::make_brlt_section(Layout* layout) | |
3471 | { | |
3472 | if (size == 64 && this->brlt_section_ == NULL) | |
3473 | { | |
3474 | Reloc_section* brlt_rel = NULL; | |
3475 | bool is_pic = parameters->options().output_is_position_independent(); | |
3476 | if (is_pic) | |
3477 | { | |
6830ee24 AM |
3478 | // When PIC we can't fill in .branch_lt (like .plt it can be |
3479 | // a bss style section) but must initialise at runtime via | |
ec661b9d AM |
3480 | // dynamic relocats. |
3481 | this->rela_dyn_section(layout); | |
3482 | brlt_rel = new Reloc_section(false); | |
3483 | this->rela_dyn_->output_section()->add_output_section_data(brlt_rel); | |
3484 | } | |
3485 | this->brlt_section_ | |
3486 | = new Output_data_brlt_powerpc<size, big_endian>(this, brlt_rel); | |
3487 | if (this->plt_ && is_pic) | |
3488 | this->plt_->output_section() | |
3489 | ->add_output_section_data(this->brlt_section_); | |
3490 | else | |
6830ee24 | 3491 | layout->add_output_section_data(".branch_lt", |
ec661b9d AM |
3492 | (is_pic ? elfcpp::SHT_NOBITS |
3493 | : elfcpp::SHT_PROGBITS), | |
3494 | elfcpp::SHF_ALLOC | elfcpp::SHF_WRITE, | |
3495 | this->brlt_section_, | |
3496 | (is_pic ? ORDER_SMALL_BSS | |
3497 | : ORDER_SMALL_DATA), | |
3498 | false); | |
3499 | } | |
3500 | } | |
3501 | ||
6830ee24 | 3502 | // Write out .branch_lt when non-PIC. |
ec661b9d AM |
3503 | |
3504 | template<int size, bool big_endian> | |
3505 | void | |
3506 | Output_data_brlt_powerpc<size, big_endian>::do_write(Output_file* of) | |
3507 | { | |
3508 | if (size == 64 && !parameters->options().output_is_position_independent()) | |
3509 | { | |
3510 | const section_size_type offset = this->offset(); | |
3511 | const section_size_type oview_size | |
3512 | = convert_to_section_size_type(this->data_size()); | |
3513 | unsigned char* const oview = of->get_output_view(offset, oview_size); | |
3514 | ||
3515 | this->targ_->write_branch_lookup_table(oview); | |
3516 | of->write_output_view(offset, oview_size, oview); | |
3517 | } | |
3518 | } | |
3519 | ||
9e69ed50 AM |
3520 | static inline uint32_t |
3521 | l(uint32_t a) | |
3522 | { | |
3523 | return a & 0xffff; | |
3524 | } | |
3525 | ||
3526 | static inline uint32_t | |
3527 | hi(uint32_t a) | |
3528 | { | |
3529 | return l(a >> 16); | |
3530 | } | |
3531 | ||
3532 | static inline uint32_t | |
3533 | ha(uint32_t a) | |
3534 | { | |
3535 | return hi(a + 0x8000); | |
3536 | } | |
3537 | ||
9d5781f8 AM |
3538 | template<int size> |
3539 | struct Eh_cie | |
3540 | { | |
3541 | static const unsigned char eh_frame_cie[12]; | |
3542 | }; | |
3543 | ||
3544 | template<int size> | |
3545 | const unsigned char Eh_cie<size>::eh_frame_cie[] = | |
3546 | { | |
3547 | 1, // CIE version. | |
3548 | 'z', 'R', 0, // Augmentation string. | |
3549 | 4, // Code alignment. | |
3550 | 0x80 - size / 8 , // Data alignment. | |
3551 | 65, // RA reg. | |
3552 | 1, // Augmentation size. | |
3553 | (elfcpp::DW_EH_PE_pcrel | |
3554 | | elfcpp::DW_EH_PE_sdata4), // FDE encoding. | |
3555 | elfcpp::DW_CFA_def_cfa, 1, 0 // def_cfa: r1 offset 0. | |
3556 | }; | |
3557 | ||
b4f7960d AM |
3558 | // Describe __glink_PLTresolve use of LR, 64-bit version ABIv1. |
3559 | static const unsigned char glink_eh_frame_fde_64v1[] = | |
9d5781f8 AM |
3560 | { |
3561 | 0, 0, 0, 0, // Replaced with offset to .glink. | |
3562 | 0, 0, 0, 0, // Replaced with size of .glink. | |
3563 | 0, // Augmentation size. | |
3564 | elfcpp::DW_CFA_advance_loc + 1, | |
3565 | elfcpp::DW_CFA_register, 65, 12, | |
3566 | elfcpp::DW_CFA_advance_loc + 4, | |
3567 | elfcpp::DW_CFA_restore_extended, 65 | |
3568 | }; | |
3569 | ||
b4f7960d AM |
3570 | // Describe __glink_PLTresolve use of LR, 64-bit version ABIv2. |
3571 | static const unsigned char glink_eh_frame_fde_64v2[] = | |
3572 | { | |
3573 | 0, 0, 0, 0, // Replaced with offset to .glink. | |
3574 | 0, 0, 0, 0, // Replaced with size of .glink. | |
3575 | 0, // Augmentation size. | |
3576 | elfcpp::DW_CFA_advance_loc + 1, | |
3577 | elfcpp::DW_CFA_register, 65, 0, | |
3578 | elfcpp::DW_CFA_advance_loc + 4, | |
3579 | elfcpp::DW_CFA_restore_extended, 65 | |
3580 | }; | |
3581 | ||
9d5781f8 AM |
3582 | // Describe __glink_PLTresolve use of LR, 32-bit version. |
3583 | static const unsigned char glink_eh_frame_fde_32[] = | |
3584 | { | |
3585 | 0, 0, 0, 0, // Replaced with offset to .glink. | |
3586 | 0, 0, 0, 0, // Replaced with size of .glink. | |
3587 | 0, // Augmentation size. | |
3588 | elfcpp::DW_CFA_advance_loc + 2, | |
3589 | elfcpp::DW_CFA_register, 65, 0, | |
3590 | elfcpp::DW_CFA_advance_loc + 4, | |
3591 | elfcpp::DW_CFA_restore_extended, 65 | |
3592 | }; | |
3593 | ||
3594 | static const unsigned char default_fde[] = | |
3595 | { | |
3596 | 0, 0, 0, 0, // Replaced with offset to stubs. | |
3597 | 0, 0, 0, 0, // Replaced with size of stubs. | |
3598 | 0, // Augmentation size. | |
3599 | elfcpp::DW_CFA_nop, // Pad. | |
3600 | elfcpp::DW_CFA_nop, | |
3601 | elfcpp::DW_CFA_nop | |
3602 | }; | |
3603 | ||
9e69ed50 AM |
3604 | template<bool big_endian> |
3605 | static inline void | |
3606 | write_insn(unsigned char* p, uint32_t v) | |
3607 | { | |
3608 | elfcpp::Swap<32, big_endian>::writeval(p, v); | |
3609 | } | |
3610 | ||
ec661b9d AM |
3611 | // Stub_table holds information about plt and long branch stubs. |
3612 | // Stubs are built in an area following some input section determined | |
3613 | // by group_sections(). This input section is converted to a relaxed | |
3614 | // input section allowing it to be resized to accommodate the stubs | |
3615 | ||
3616 | template<int size, bool big_endian> | |
3617 | class Stub_table : public Output_relaxed_input_section | |
3618 | { | |
3619 | public: | |
3620 | typedef typename elfcpp::Elf_types<size>::Elf_Addr Address; | |
3621 | static const Address invalid_address = static_cast<Address>(0) - 1; | |
3622 | ||
a3e60ddb AM |
3623 | Stub_table(Target_powerpc<size, big_endian>* targ, |
3624 | Output_section* output_section, | |
3625 | const Output_section::Input_section* owner) | |
3626 | : Output_relaxed_input_section(owner->relobj(), owner->shndx(), | |
3627 | owner->relobj() | |
3628 | ->section_addralign(owner->shndx())), | |
ec661b9d | 3629 | targ_(targ), plt_call_stubs_(), long_branch_stubs_(), |
a3e60ddb AM |
3630 | orig_data_size_(owner->current_data_size()), |
3631 | plt_size_(0), last_plt_size_(0), | |
d49044c7 AM |
3632 | branch_size_(0), last_branch_size_(0), eh_frame_added_(false), |
3633 | need_save_res_(false) | |
a3e60ddb AM |
3634 | { |
3635 | this->set_output_section(output_section); | |
ec661b9d | 3636 | |
a3e60ddb AM |
3637 | std::vector<Output_relaxed_input_section*> new_relaxed; |
3638 | new_relaxed.push_back(this); | |
3639 | output_section->convert_input_sections_to_relaxed_sections(new_relaxed); | |
3640 | } | |
ec661b9d AM |
3641 | |
3642 | // Add a plt call stub. | |
a3e60ddb AM |
3643 | bool |
3644 | add_plt_call_entry(Address, | |
3645 | const Sized_relobj_file<size, big_endian>*, | |
ec661b9d AM |
3646 | const Symbol*, |
3647 | unsigned int, | |
3648 | Address); | |
3649 | ||
a3e60ddb AM |
3650 | bool |
3651 | add_plt_call_entry(Address, | |
3652 | const Sized_relobj_file<size, big_endian>*, | |
ec661b9d AM |
3653 | unsigned int, |
3654 | unsigned int, | |
3655 | Address); | |
3656 | ||
3657 | // Find a given plt call stub. | |
3658 | Address | |
3659 | find_plt_call_entry(const Symbol*) const; | |
3660 | ||
3661 | Address | |
3662 | find_plt_call_entry(const Sized_relobj_file<size, big_endian>*, | |
3663 | unsigned int) const; | |
3664 | ||
3665 | Address | |
3666 | find_plt_call_entry(const Sized_relobj_file<size, big_endian>*, | |
3667 | const Symbol*, | |
3668 | unsigned int, | |
3669 | Address) const; | |
3670 | ||
3671 | Address | |
3672 | find_plt_call_entry(const Sized_relobj_file<size, big_endian>*, | |
3673 | unsigned int, | |
3674 | unsigned int, | |
3675 | Address) const; | |
3676 | ||
3677 | // Add a long branch stub. | |
a3e60ddb AM |
3678 | bool |
3679 | add_long_branch_entry(const Powerpc_relobj<size, big_endian>*, | |
d49044c7 | 3680 | unsigned int, Address, Address, bool); |
ec661b9d AM |
3681 | |
3682 | Address | |
9d5781f8 AM |
3683 | find_long_branch_entry(const Powerpc_relobj<size, big_endian>*, |
3684 | Address) const; | |
ec661b9d | 3685 | |
a3e60ddb AM |
3686 | bool |
3687 | can_reach_stub(Address from, unsigned int off, unsigned int r_type) | |
3688 | { | |
cbcb23fa | 3689 | Address max_branch_offset = max_branch_delta(r_type); |
a3e60ddb AM |
3690 | if (max_branch_offset == 0) |
3691 | return true; | |
3692 | gold_assert(from != invalid_address); | |
3693 | Address loc = off + this->stub_address(); | |
3694 | return loc - from + max_branch_offset < 2 * max_branch_offset; | |
3695 | } | |
3696 | ||
ec661b9d | 3697 | void |
a3e60ddb | 3698 | clear_stubs(bool all) |
cf43a2fe | 3699 | { |
9e69ed50 AM |
3700 | this->plt_call_stubs_.clear(); |
3701 | this->plt_size_ = 0; | |
ec661b9d AM |
3702 | this->long_branch_stubs_.clear(); |
3703 | this->branch_size_ = 0; | |
d49044c7 | 3704 | this->need_save_res_ = false; |
a3e60ddb AM |
3705 | if (all) |
3706 | { | |
3707 | this->last_plt_size_ = 0; | |
3708 | this->last_branch_size_ = 0; | |
3709 | } | |
cf43a2fe AM |
3710 | } |
3711 | ||
ec661b9d AM |
3712 | Address |
3713 | set_address_and_size(const Output_section* os, Address off) | |
cf43a2fe | 3714 | { |
ec661b9d AM |
3715 | Address start_off = off; |
3716 | off += this->orig_data_size_; | |
3717 | Address my_size = this->plt_size_ + this->branch_size_; | |
d49044c7 AM |
3718 | if (this->need_save_res_) |
3719 | my_size += this->targ_->savres_section()->data_size(); | |
ec661b9d AM |
3720 | if (my_size != 0) |
3721 | off = align_address(off, this->stub_align()); | |
3722 | // Include original section size and alignment padding in size | |
3723 | my_size += off - start_off; | |
3724 | this->reset_address_and_file_offset(); | |
3725 | this->set_current_data_size(my_size); | |
3726 | this->set_address_and_file_offset(os->address() + start_off, | |
3727 | os->offset() + start_off); | |
3728 | return my_size; | |
cf43a2fe AM |
3729 | } |
3730 | ||
ec661b9d | 3731 | Address |
9d5781f8 | 3732 | stub_address() const |
ec661b9d AM |
3733 | { |
3734 | return align_address(this->address() + this->orig_data_size_, | |
3735 | this->stub_align()); | |
3736 | } | |
3737 | ||
3738 | Address | |
9d5781f8 | 3739 | stub_offset() const |
ec661b9d AM |
3740 | { |
3741 | return align_address(this->offset() + this->orig_data_size_, | |
3742 | this->stub_align()); | |
3743 | } | |
3744 | ||
3745 | section_size_type | |
3746 | plt_size() const | |
3747 | { return this->plt_size_; } | |
3748 | ||
3749 | bool | |
3750 | size_update() | |
3751 | { | |
3752 | Output_section* os = this->output_section(); | |
3753 | if (os->addralign() < this->stub_align()) | |
3754 | { | |
3755 | os->set_addralign(this->stub_align()); | |
3756 | // FIXME: get rid of the insane checkpointing. | |
3757 | // We can't increase alignment of the input section to which | |
3758 | // stubs are attached; The input section may be .init which | |
3759 | // is pasted together with other .init sections to form a | |
3760 | // function. Aligning might insert zero padding resulting in | |
3761 | // sigill. However we do need to increase alignment of the | |
3762 | // output section so that the align_address() on offset in | |
3763 | // set_address_and_size() adds the same padding as the | |
3764 | // align_address() on address in stub_address(). | |
3765 | // What's more, we need this alignment for the layout done in | |
3766 | // relaxation_loop_body() so that the output section starts at | |
3767 | // a suitably aligned address. | |
3768 | os->checkpoint_set_addralign(this->stub_align()); | |
3769 | } | |
9e69ed50 AM |
3770 | if (this->last_plt_size_ != this->plt_size_ |
3771 | || this->last_branch_size_ != this->branch_size_) | |
ec661b9d | 3772 | { |
9e69ed50 AM |
3773 | this->last_plt_size_ = this->plt_size_; |
3774 | this->last_branch_size_ = this->branch_size_; | |
ec661b9d AM |
3775 | return true; |
3776 | } | |
3777 | return false; | |
3778 | } | |
3779 | ||
9d5781f8 AM |
3780 | // Add .eh_frame info for this stub section. Unlike other linker |
3781 | // generated .eh_frame this is added late in the link, because we | |
3782 | // only want the .eh_frame info if this particular stub section is | |
3783 | // non-empty. | |
3784 | void | |
3785 | add_eh_frame(Layout* layout) | |
3786 | { | |
3787 | if (!this->eh_frame_added_) | |
3788 | { | |
3789 | if (!parameters->options().ld_generated_unwind_info()) | |
3790 | return; | |
3791 | ||
3792 | // Since we add stub .eh_frame info late, it must be placed | |
3793 | // after all other linker generated .eh_frame info so that | |
3794 | // merge mapping need not be updated for input sections. | |
3795 | // There is no provision to use a different CIE to that used | |
3796 | // by .glink. | |
3797 | if (!this->targ_->has_glink()) | |
3798 | return; | |
3799 | ||
3800 | layout->add_eh_frame_for_plt(this, | |
3801 | Eh_cie<size>::eh_frame_cie, | |
3802 | sizeof (Eh_cie<size>::eh_frame_cie), | |
3803 | default_fde, | |
3804 | sizeof (default_fde)); | |
3805 | this->eh_frame_added_ = true; | |
3806 | } | |
3807 | } | |
3808 | ||
ec661b9d AM |
3809 | Target_powerpc<size, big_endian>* |
3810 | targ() const | |
3811 | { return targ_; } | |
6ce78956 | 3812 | |
cf43a2fe | 3813 | private: |
9e69ed50 AM |
3814 | class Plt_stub_ent; |
3815 | class Plt_stub_ent_hash; | |
3816 | typedef Unordered_map<Plt_stub_ent, unsigned int, | |
3817 | Plt_stub_ent_hash> Plt_stub_entries; | |
3818 | ||
3819 | // Alignment of stub section. | |
ec661b9d | 3820 | unsigned int |
9e69ed50 AM |
3821 | stub_align() const |
3822 | { | |
3823 | if (size == 32) | |
3824 | return 16; | |
3825 | unsigned int min_align = 32; | |
3826 | unsigned int user_align = 1 << parameters->options().plt_align(); | |
3827 | return std::max(user_align, min_align); | |
3828 | } | |
cf43a2fe | 3829 | |
91c2b899 AM |
3830 | // Return the plt offset for the given call stub. |
3831 | Address | |
3832 | plt_off(typename Plt_stub_entries::const_iterator p, bool* is_iplt) const | |
3833 | { | |
3834 | const Symbol* gsym = p->first.sym_; | |
3835 | if (gsym != NULL) | |
3836 | { | |
3837 | *is_iplt = (gsym->type() == elfcpp::STT_GNU_IFUNC | |
3838 | && gsym->can_use_relative_reloc(false)); | |
3839 | return gsym->plt_offset(); | |
3840 | } | |
3841 | else | |
3842 | { | |
3843 | *is_iplt = true; | |
3844 | const Sized_relobj_file<size, big_endian>* relobj = p->first.object_; | |
3845 | unsigned int local_sym_index = p->first.locsym_; | |
3846 | return relobj->local_plt_offset(local_sym_index); | |
3847 | } | |
3848 | } | |
3849 | ||
9e69ed50 | 3850 | // Size of a given plt call stub. |
ec661b9d | 3851 | unsigned int |
9e69ed50 AM |
3852 | plt_call_size(typename Plt_stub_entries::const_iterator p) const |
3853 | { | |
3854 | if (size == 32) | |
3855 | return 16; | |
3856 | ||
91c2b899 AM |
3857 | bool is_iplt; |
3858 | Address plt_addr = this->plt_off(p, &is_iplt); | |
3859 | if (is_iplt) | |
3860 | plt_addr += this->targ_->iplt_section()->address(); | |
9e69ed50 | 3861 | else |
91c2b899 AM |
3862 | plt_addr += this->targ_->plt_section()->address(); |
3863 | Address got_addr = this->targ_->got_section()->output_section()->address(); | |
9e69ed50 AM |
3864 | const Powerpc_relobj<size, big_endian>* ppcobj = static_cast |
3865 | <const Powerpc_relobj<size, big_endian>*>(p->first.object_); | |
91c2b899 AM |
3866 | got_addr += ppcobj->toc_base_offset(); |
3867 | Address off = plt_addr - got_addr; | |
b4f7960d AM |
3868 | unsigned int bytes = 4 * 4 + 4 * (ha(off) != 0); |
3869 | if (this->targ_->abiversion() < 2) | |
3870 | { | |
3871 | bool static_chain = parameters->options().plt_static_chain(); | |
3872 | bool thread_safe = this->targ_->plt_thread_safe(); | |
3873 | bytes += (4 | |
3874 | + 4 * static_chain | |
3875 | + 8 * thread_safe | |
3876 | + 4 * (ha(off + 8 + 8 * static_chain) != ha(off))); | |
3877 | } | |
9e69ed50 AM |
3878 | unsigned int align = 1 << parameters->options().plt_align(); |
3879 | if (align > 1) | |
3880 | bytes = (bytes + align - 1) & -align; | |
3881 | return bytes; | |
3882 | } | |
ec661b9d AM |
3883 | |
3884 | // Return long branch stub size. | |
3885 | unsigned int | |
3886 | branch_stub_size(Address to) | |
3887 | { | |
9e69ed50 AM |
3888 | Address loc |
3889 | = this->stub_address() + this->last_plt_size_ + this->branch_size_; | |
3890 | if (to - loc + (1 << 25) < 2 << 25) | |
ec661b9d AM |
3891 | return 4; |
3892 | if (size == 64 || !parameters->options().output_is_position_independent()) | |
3893 | return 16; | |
3894 | return 32; | |
3895 | } | |
3896 | ||
3897 | // Write out stubs. | |
cf43a2fe AM |
3898 | void |
3899 | do_write(Output_file*); | |
3900 | ||
ec661b9d AM |
3901 | // Plt call stub keys. |
3902 | class Plt_stub_ent | |
cf43a2fe | 3903 | { |
d1a8cabd | 3904 | public: |
ec661b9d | 3905 | Plt_stub_ent(const Symbol* sym) |
c9824451 AM |
3906 | : sym_(sym), object_(0), addend_(0), locsym_(0) |
3907 | { } | |
3908 | ||
ec661b9d AM |
3909 | Plt_stub_ent(const Sized_relobj_file<size, big_endian>* object, |
3910 | unsigned int locsym_index) | |
c9824451 AM |
3911 | : sym_(NULL), object_(object), addend_(0), locsym_(locsym_index) |
3912 | { } | |
3913 | ||
ec661b9d AM |
3914 | Plt_stub_ent(const Sized_relobj_file<size, big_endian>* object, |
3915 | const Symbol* sym, | |
3916 | unsigned int r_type, | |
3917 | Address addend) | |
e5d5f5ed | 3918 | : sym_(sym), object_(0), addend_(0), locsym_(0) |
cf43a2fe AM |
3919 | { |
3920 | if (size != 32) | |
ec661b9d | 3921 | this->addend_ = addend; |
d1a8cabd | 3922 | else if (parameters->options().output_is_position_independent() |
ec661b9d | 3923 | && r_type == elfcpp::R_PPC_PLTREL24) |
cf43a2fe | 3924 | { |
ec661b9d | 3925 | this->addend_ = addend; |
e5d5f5ed | 3926 | if (this->addend_ >= 32768) |
d1a8cabd | 3927 | this->object_ = object; |
cf43a2fe AM |
3928 | } |
3929 | } | |
3930 | ||
ec661b9d AM |
3931 | Plt_stub_ent(const Sized_relobj_file<size, big_endian>* object, |
3932 | unsigned int locsym_index, | |
3933 | unsigned int r_type, | |
3934 | Address addend) | |
e5d5f5ed AM |
3935 | : sym_(NULL), object_(object), addend_(0), locsym_(locsym_index) |
3936 | { | |
3937 | if (size != 32) | |
ec661b9d | 3938 | this->addend_ = addend; |
e5d5f5ed | 3939 | else if (parameters->options().output_is_position_independent() |
ec661b9d AM |
3940 | && r_type == elfcpp::R_PPC_PLTREL24) |
3941 | this->addend_ = addend; | |
e5d5f5ed AM |
3942 | } |
3943 | ||
ec661b9d | 3944 | bool operator==(const Plt_stub_ent& that) const |
cf43a2fe AM |
3945 | { |
3946 | return (this->sym_ == that.sym_ | |
3947 | && this->object_ == that.object_ | |
e5d5f5ed AM |
3948 | && this->addend_ == that.addend_ |
3949 | && this->locsym_ == that.locsym_); | |
cf43a2fe | 3950 | } |
c9269dff AM |
3951 | |
3952 | const Symbol* sym_; | |
e5d5f5ed AM |
3953 | const Sized_relobj_file<size, big_endian>* object_; |
3954 | typename elfcpp::Elf_types<size>::Elf_Addr addend_; | |
3955 | unsigned int locsym_; | |
cf43a2fe AM |
3956 | }; |
3957 | ||
ec661b9d | 3958 | class Plt_stub_ent_hash |
cf43a2fe | 3959 | { |
d1a8cabd | 3960 | public: |
ec661b9d | 3961 | size_t operator()(const Plt_stub_ent& ent) const |
cf43a2fe AM |
3962 | { |
3963 | return (reinterpret_cast<uintptr_t>(ent.sym_) | |
3964 | ^ reinterpret_cast<uintptr_t>(ent.object_) | |
e5d5f5ed AM |
3965 | ^ ent.addend_ |
3966 | ^ ent.locsym_); | |
cf43a2fe | 3967 | } |
ec661b9d AM |
3968 | }; |
3969 | ||
3970 | // Long branch stub keys. | |
3971 | class Branch_stub_ent | |
3972 | { | |
3973 | public: | |
d49044c7 AM |
3974 | Branch_stub_ent(const Powerpc_relobj<size, big_endian>* obj, |
3975 | Address to, bool save_res) | |
3976 | : dest_(to), toc_base_off_(0), save_res_(save_res) | |
ec661b9d AM |
3977 | { |
3978 | if (size == 64) | |
3979 | toc_base_off_ = obj->toc_base_offset(); | |
3980 | } | |
3981 | ||
3982 | bool operator==(const Branch_stub_ent& that) const | |
3983 | { | |
3984 | return (this->dest_ == that.dest_ | |
3985 | && (size == 32 | |
3986 | || this->toc_base_off_ == that.toc_base_off_)); | |
3987 | } | |
cf43a2fe | 3988 | |
ec661b9d AM |
3989 | Address dest_; |
3990 | unsigned int toc_base_off_; | |
d49044c7 | 3991 | bool save_res_; |
ec661b9d | 3992 | }; |
cf43a2fe | 3993 | |
ec661b9d AM |
3994 | class Branch_stub_ent_hash |
3995 | { | |
3996 | public: | |
3997 | size_t operator()(const Branch_stub_ent& ent) const | |
3998 | { return ent.dest_ ^ ent.toc_base_off_; } | |
3999 | }; | |
cf43a2fe | 4000 | |
ec661b9d | 4001 | // In a sane world this would be a global. |
cf43a2fe | 4002 | Target_powerpc<size, big_endian>* targ_; |
ec661b9d | 4003 | // Map sym/object/addend to stub offset. |
ec661b9d AM |
4004 | Plt_stub_entries plt_call_stubs_; |
4005 | // Map destination address to stub offset. | |
4006 | typedef Unordered_map<Branch_stub_ent, unsigned int, | |
4007 | Branch_stub_ent_hash> Branch_stub_entries; | |
4008 | Branch_stub_entries long_branch_stubs_; | |
4009 | // size of input section | |
4010 | section_size_type orig_data_size_; | |
4011 | // size of stubs | |
9e69ed50 | 4012 | section_size_type plt_size_, last_plt_size_, branch_size_, last_branch_size_; |
9d5781f8 AM |
4013 | // Whether .eh_frame info has been created for this stub section. |
4014 | bool eh_frame_added_; | |
d49044c7 AM |
4015 | // Set if this stub group needs a copy of out-of-line register |
4016 | // save/restore functions. | |
4017 | bool need_save_res_; | |
cf43a2fe AM |
4018 | }; |
4019 | ||
ec661b9d | 4020 | // Add a plt call stub, if we do not already have one for this |
d1a8cabd | 4021 | // sym/object/addend combo. |
cf43a2fe AM |
4022 | |
4023 | template<int size, bool big_endian> | |
a3e60ddb | 4024 | bool |
ec661b9d | 4025 | Stub_table<size, big_endian>::add_plt_call_entry( |
a3e60ddb | 4026 | Address from, |
c9824451 | 4027 | const Sized_relobj_file<size, big_endian>* object, |
d83ce4e3 | 4028 | const Symbol* gsym, |
ec661b9d AM |
4029 | unsigned int r_type, |
4030 | Address addend) | |
cf43a2fe | 4031 | { |
ec661b9d | 4032 | Plt_stub_ent ent(object, gsym, r_type, addend); |
9055360d | 4033 | unsigned int off = this->plt_size_; |
9e69ed50 AM |
4034 | std::pair<typename Plt_stub_entries::iterator, bool> p |
4035 | = this->plt_call_stubs_.insert(std::make_pair(ent, off)); | |
4036 | if (p.second) | |
4037 | this->plt_size_ = off + this->plt_call_size(p.first); | |
a3e60ddb | 4038 | return this->can_reach_stub(from, off, r_type); |
cf43a2fe AM |
4039 | } |
4040 | ||
e5d5f5ed | 4041 | template<int size, bool big_endian> |
a3e60ddb | 4042 | bool |
ec661b9d | 4043 | Stub_table<size, big_endian>::add_plt_call_entry( |
a3e60ddb | 4044 | Address from, |
c9824451 | 4045 | const Sized_relobj_file<size, big_endian>* object, |
e5d5f5ed | 4046 | unsigned int locsym_index, |
ec661b9d AM |
4047 | unsigned int r_type, |
4048 | Address addend) | |
e5d5f5ed | 4049 | { |
ec661b9d | 4050 | Plt_stub_ent ent(object, locsym_index, r_type, addend); |
9055360d | 4051 | unsigned int off = this->plt_size_; |
9e69ed50 AM |
4052 | std::pair<typename Plt_stub_entries::iterator, bool> p |
4053 | = this->plt_call_stubs_.insert(std::make_pair(ent, off)); | |
4054 | if (p.second) | |
4055 | this->plt_size_ = off + this->plt_call_size(p.first); | |
a3e60ddb | 4056 | return this->can_reach_stub(from, off, r_type); |
e5d5f5ed AM |
4057 | } |
4058 | ||
ec661b9d AM |
4059 | // Find a plt call stub. |
4060 | ||
cf43a2fe | 4061 | template<int size, bool big_endian> |
ec5b8187 | 4062 | typename Stub_table<size, big_endian>::Address |
ec661b9d | 4063 | Stub_table<size, big_endian>::find_plt_call_entry( |
c9824451 | 4064 | const Sized_relobj_file<size, big_endian>* object, |
d83ce4e3 | 4065 | const Symbol* gsym, |
ec661b9d AM |
4066 | unsigned int r_type, |
4067 | Address addend) const | |
c9824451 | 4068 | { |
ec661b9d AM |
4069 | Plt_stub_ent ent(object, gsym, r_type, addend); |
4070 | typename Plt_stub_entries::const_iterator p = this->plt_call_stubs_.find(ent); | |
4071 | return p == this->plt_call_stubs_.end() ? invalid_address : p->second; | |
c9824451 AM |
4072 | } |
4073 | ||
4074 | template<int size, bool big_endian> | |
ec5b8187 | 4075 | typename Stub_table<size, big_endian>::Address |
ec661b9d | 4076 | Stub_table<size, big_endian>::find_plt_call_entry(const Symbol* gsym) const |
cf43a2fe | 4077 | { |
ec661b9d AM |
4078 | Plt_stub_ent ent(gsym); |
4079 | typename Plt_stub_entries::const_iterator p = this->plt_call_stubs_.find(ent); | |
4080 | return p == this->plt_call_stubs_.end() ? invalid_address : p->second; | |
cf43a2fe AM |
4081 | } |
4082 | ||
e5d5f5ed | 4083 | template<int size, bool big_endian> |
ec5b8187 | 4084 | typename Stub_table<size, big_endian>::Address |
ec661b9d | 4085 | Stub_table<size, big_endian>::find_plt_call_entry( |
c9824451 | 4086 | const Sized_relobj_file<size, big_endian>* object, |
e5d5f5ed | 4087 | unsigned int locsym_index, |
ec661b9d AM |
4088 | unsigned int r_type, |
4089 | Address addend) const | |
e5d5f5ed | 4090 | { |
ec661b9d AM |
4091 | Plt_stub_ent ent(object, locsym_index, r_type, addend); |
4092 | typename Plt_stub_entries::const_iterator p = this->plt_call_stubs_.find(ent); | |
4093 | return p == this->plt_call_stubs_.end() ? invalid_address : p->second; | |
c9824451 AM |
4094 | } |
4095 | ||
4096 | template<int size, bool big_endian> | |
ec5b8187 | 4097 | typename Stub_table<size, big_endian>::Address |
ec661b9d | 4098 | Stub_table<size, big_endian>::find_plt_call_entry( |
c9824451 AM |
4099 | const Sized_relobj_file<size, big_endian>* object, |
4100 | unsigned int locsym_index) const | |
4101 | { | |
ec661b9d AM |
4102 | Plt_stub_ent ent(object, locsym_index); |
4103 | typename Plt_stub_entries::const_iterator p = this->plt_call_stubs_.find(ent); | |
4104 | return p == this->plt_call_stubs_.end() ? invalid_address : p->second; | |
4105 | } | |
4106 | ||
4107 | // Add a long branch stub if we don't already have one to given | |
4108 | // destination. | |
4109 | ||
4110 | template<int size, bool big_endian> | |
a3e60ddb | 4111 | bool |
ec661b9d AM |
4112 | Stub_table<size, big_endian>::add_long_branch_entry( |
4113 | const Powerpc_relobj<size, big_endian>* object, | |
a3e60ddb AM |
4114 | unsigned int r_type, |
4115 | Address from, | |
d49044c7 AM |
4116 | Address to, |
4117 | bool save_res) | |
ec661b9d | 4118 | { |
d49044c7 | 4119 | Branch_stub_ent ent(object, to, save_res); |
ec661b9d AM |
4120 | Address off = this->branch_size_; |
4121 | if (this->long_branch_stubs_.insert(std::make_pair(ent, off)).second) | |
4122 | { | |
d49044c7 AM |
4123 | if (save_res) |
4124 | this->need_save_res_ = true; | |
4125 | else | |
4126 | { | |
4127 | unsigned int stub_size = this->branch_stub_size(to); | |
4128 | this->branch_size_ = off + stub_size; | |
4129 | if (size == 64 && stub_size != 4) | |
4130 | this->targ_->add_branch_lookup_table(to); | |
4131 | } | |
ec661b9d | 4132 | } |
a3e60ddb | 4133 | return this->can_reach_stub(from, off, r_type); |
ec661b9d AM |
4134 | } |
4135 | ||
d49044c7 | 4136 | // Find long branch stub offset. |
ec661b9d AM |
4137 | |
4138 | template<int size, bool big_endian> | |
ec5b8187 | 4139 | typename Stub_table<size, big_endian>::Address |
ec661b9d AM |
4140 | Stub_table<size, big_endian>::find_long_branch_entry( |
4141 | const Powerpc_relobj<size, big_endian>* object, | |
9d5781f8 | 4142 | Address to) const |
ec661b9d | 4143 | { |
d49044c7 | 4144 | Branch_stub_ent ent(object, to, false); |
ec661b9d AM |
4145 | typename Branch_stub_entries::const_iterator p |
4146 | = this->long_branch_stubs_.find(ent); | |
d49044c7 AM |
4147 | if (p == this->long_branch_stubs_.end()) |
4148 | return invalid_address; | |
4149 | if (p->first.save_res_) | |
4150 | return to - this->targ_->savres_section()->address() + this->branch_size_; | |
4151 | return p->second; | |
e5d5f5ed AM |
4152 | } |
4153 | ||
ec661b9d AM |
4154 | // A class to handle .glink. |
4155 | ||
4156 | template<int size, bool big_endian> | |
4157 | class Output_data_glink : public Output_section_data | |
4158 | { | |
4159 | public: | |
9055360d AM |
4160 | typedef typename elfcpp::Elf_types<size>::Elf_Addr Address; |
4161 | static const Address invalid_address = static_cast<Address>(0) - 1; | |
ec661b9d AM |
4162 | static const int pltresolve_size = 16*4; |
4163 | ||
4164 | Output_data_glink(Target_powerpc<size, big_endian>* targ) | |
9055360d AM |
4165 | : Output_section_data(16), targ_(targ), global_entry_stubs_(), |
4166 | end_branch_table_(), ge_size_(0) | |
ec661b9d AM |
4167 | { } |
4168 | ||
9d5781f8 | 4169 | void |
9055360d | 4170 | add_eh_frame(Layout* layout); |
9d5781f8 | 4171 | |
9055360d AM |
4172 | void |
4173 | add_global_entry(const Symbol*); | |
4174 | ||
4175 | Address | |
4176 | find_global_entry(const Symbol*) const; | |
4177 | ||
4178 | Address | |
4179 | global_entry_address() const | |
4180 | { | |
4181 | gold_assert(this->is_data_size_valid()); | |
4182 | unsigned int global_entry_off = (this->end_branch_table_ + 15) & -16; | |
4183 | return this->address() + global_entry_off; | |
9d5781f8 AM |
4184 | } |
4185 | ||
ec661b9d AM |
4186 | protected: |
4187 | // Write to a map file. | |
4188 | void | |
4189 | do_print_to_mapfile(Mapfile* mapfile) const | |
4190 | { mapfile->print_output_data(this, _("** glink")); } | |
4191 | ||
4192 | private: | |
4193 | void | |
4194 | set_final_data_size(); | |
4195 | ||
4196 | // Write out .glink | |
4197 | void | |
4198 | do_write(Output_file*); | |
4199 | ||
4200 | // Allows access to .got and .plt for do_write. | |
4201 | Target_powerpc<size, big_endian>* targ_; | |
9055360d AM |
4202 | |
4203 | // Map sym to stub offset. | |
4204 | typedef Unordered_map<const Symbol*, unsigned int> Global_entry_stub_entries; | |
4205 | Global_entry_stub_entries global_entry_stubs_; | |
4206 | ||
4207 | unsigned int end_branch_table_, ge_size_; | |
ec661b9d AM |
4208 | }; |
4209 | ||
9055360d AM |
4210 | template<int size, bool big_endian> |
4211 | void | |
4212 | Output_data_glink<size, big_endian>::add_eh_frame(Layout* layout) | |
4213 | { | |
4214 | if (!parameters->options().ld_generated_unwind_info()) | |
4215 | return; | |
4216 | ||
4217 | if (size == 64) | |
4218 | { | |
4219 | if (this->targ_->abiversion() < 2) | |
4220 | layout->add_eh_frame_for_plt(this, | |
4221 | Eh_cie<64>::eh_frame_cie, | |
4222 | sizeof (Eh_cie<64>::eh_frame_cie), | |
4223 | glink_eh_frame_fde_64v1, | |
4224 | sizeof (glink_eh_frame_fde_64v1)); | |
4225 | else | |
4226 | layout->add_eh_frame_for_plt(this, | |
4227 | Eh_cie<64>::eh_frame_cie, | |
4228 | sizeof (Eh_cie<64>::eh_frame_cie), | |
4229 | glink_eh_frame_fde_64v2, | |
4230 | sizeof (glink_eh_frame_fde_64v2)); | |
4231 | } | |
4232 | else | |
4233 | { | |
4234 | // 32-bit .glink can use the default since the CIE return | |
4235 | // address reg, LR, is valid. | |
4236 | layout->add_eh_frame_for_plt(this, | |
4237 | Eh_cie<32>::eh_frame_cie, | |
4238 | sizeof (Eh_cie<32>::eh_frame_cie), | |
4239 | default_fde, | |
4240 | sizeof (default_fde)); | |
4241 | // Except where LR is used in a PIC __glink_PLTresolve. | |
4242 | if (parameters->options().output_is_position_independent()) | |
4243 | layout->add_eh_frame_for_plt(this, | |
4244 | Eh_cie<32>::eh_frame_cie, | |
4245 | sizeof (Eh_cie<32>::eh_frame_cie), | |
4246 | glink_eh_frame_fde_32, | |
4247 | sizeof (glink_eh_frame_fde_32)); | |
4248 | } | |
4249 | } | |
4250 | ||
4251 | template<int size, bool big_endian> | |
4252 | void | |
4253 | Output_data_glink<size, big_endian>::add_global_entry(const Symbol* gsym) | |
4254 | { | |
4255 | std::pair<typename Global_entry_stub_entries::iterator, bool> p | |
4256 | = this->global_entry_stubs_.insert(std::make_pair(gsym, this->ge_size_)); | |
4257 | if (p.second) | |
4258 | this->ge_size_ += 16; | |
4259 | } | |
4260 | ||
4261 | template<int size, bool big_endian> | |
4262 | typename Output_data_glink<size, big_endian>::Address | |
4263 | Output_data_glink<size, big_endian>::find_global_entry(const Symbol* gsym) const | |
4264 | { | |
4265 | typename Global_entry_stub_entries::const_iterator p | |
4266 | = this->global_entry_stubs_.find(gsym); | |
4267 | return p == this->global_entry_stubs_.end() ? invalid_address : p->second; | |
4268 | } | |
4269 | ||
cf43a2fe AM |
4270 | template<int size, bool big_endian> |
4271 | void | |
4272 | Output_data_glink<size, big_endian>::set_final_data_size() | |
4273 | { | |
ec661b9d AM |
4274 | unsigned int count = this->targ_->plt_entry_count(); |
4275 | section_size_type total = 0; | |
cf43a2fe AM |
4276 | |
4277 | if (count != 0) | |
4278 | { | |
4279 | if (size == 32) | |
4280 | { | |
cf43a2fe AM |
4281 | // space for branch table |
4282 | total += 4 * (count - 1); | |
4283 | ||
4284 | total += -total & 15; | |
4285 | total += this->pltresolve_size; | |
4286 | } | |
4287 | else | |
4288 | { | |
cf43a2fe AM |
4289 | total += this->pltresolve_size; |
4290 | ||
4291 | // space for branch table | |
b4f7960d AM |
4292 | total += 4 * count; |
4293 | if (this->targ_->abiversion() < 2) | |
4294 | { | |
4295 | total += 4 * count; | |
4296 | if (count > 0x8000) | |
4297 | total += 4 * (count - 0x8000); | |
4298 | } | |
cf43a2fe AM |
4299 | } |
4300 | } | |
9055360d AM |
4301 | this->end_branch_table_ = total; |
4302 | total = (total + 15) & -16; | |
4303 | total += this->ge_size_; | |
cf43a2fe AM |
4304 | |
4305 | this->set_data_size(total); | |
4306 | } | |
4307 | ||
ec661b9d | 4308 | // Write out plt and long branch stub code. |
cf43a2fe AM |
4309 | |
4310 | template<int size, bool big_endian> | |
4311 | void | |
ec661b9d | 4312 | Stub_table<size, big_endian>::do_write(Output_file* of) |
cf43a2fe | 4313 | { |
ec661b9d AM |
4314 | if (this->plt_call_stubs_.empty() |
4315 | && this->long_branch_stubs_.empty()) | |
4316 | return; | |
4317 | ||
4318 | const section_size_type start_off = this->offset(); | |
4319 | const section_size_type off = this->stub_offset(); | |
42cacb20 | 4320 | const section_size_type oview_size = |
ec661b9d | 4321 | convert_to_section_size_type(this->data_size() - (off - start_off)); |
cf43a2fe | 4322 | unsigned char* const oview = of->get_output_view(off, oview_size); |
c9269dff | 4323 | unsigned char* p; |
42cacb20 | 4324 | |
cf43a2fe AM |
4325 | if (size == 64) |
4326 | { | |
ec661b9d AM |
4327 | const Output_data_got_powerpc<size, big_endian>* got |
4328 | = this->targ_->got_section(); | |
dd93cd0a | 4329 | Address got_os_addr = got->output_section()->address(); |
c9269dff | 4330 | |
ec661b9d | 4331 | if (!this->plt_call_stubs_.empty()) |
cf43a2fe | 4332 | { |
ec661b9d AM |
4333 | // The base address of the .plt section. |
4334 | Address plt_base = this->targ_->plt_section()->address(); | |
4335 | Address iplt_base = invalid_address; | |
4336 | ||
4337 | // Write out plt call stubs. | |
4338 | typename Plt_stub_entries::const_iterator cs; | |
4339 | for (cs = this->plt_call_stubs_.begin(); | |
4340 | cs != this->plt_call_stubs_.end(); | |
4341 | ++cs) | |
e5d5f5ed | 4342 | { |
91c2b899 AM |
4343 | bool is_iplt; |
4344 | Address pltoff = this->plt_off(cs, &is_iplt); | |
9e69ed50 | 4345 | Address plt_addr = pltoff; |
91c2b899 | 4346 | if (is_iplt) |
ec661b9d AM |
4347 | { |
4348 | if (iplt_base == invalid_address) | |
4349 | iplt_base = this->targ_->iplt_section()->address(); | |
4350 | plt_addr += iplt_base; | |
4351 | } | |
4352 | else | |
4353 | plt_addr += plt_base; | |
4354 | const Powerpc_relobj<size, big_endian>* ppcobj = static_cast | |
4355 | <const Powerpc_relobj<size, big_endian>*>(cs->first.object_); | |
4356 | Address got_addr = got_os_addr + ppcobj->toc_base_offset(); | |
9e69ed50 | 4357 | Address off = plt_addr - got_addr; |
ec661b9d | 4358 | |
9e69ed50 | 4359 | if (off + 0x80008000 > 0xffffffff || (off & 7) != 0) |
ec661b9d AM |
4360 | gold_error(_("%s: linkage table error against `%s'"), |
4361 | cs->first.object_->name().c_str(), | |
4362 | cs->first.sym_->demangled_name().c_str()); | |
4363 | ||
b4f7960d AM |
4364 | bool plt_load_toc = this->targ_->abiversion() < 2; |
4365 | bool static_chain | |
4366 | = plt_load_toc && parameters->options().plt_static_chain(); | |
4367 | bool thread_safe | |
4368 | = plt_load_toc && this->targ_->plt_thread_safe(); | |
9e69ed50 AM |
4369 | bool use_fake_dep = false; |
4370 | Address cmp_branch_off = 0; | |
4371 | if (thread_safe) | |
4372 | { | |
4373 | unsigned int pltindex | |
4374 | = ((pltoff - this->targ_->first_plt_entry_offset()) | |
4375 | / this->targ_->plt_entry_size()); | |
4376 | Address glinkoff | |
4377 | = (this->targ_->glink_section()->pltresolve_size | |
4378 | + pltindex * 8); | |
4379 | if (pltindex > 32768) | |
4380 | glinkoff += (pltindex - 32768) * 4; | |
4381 | Address to | |
4382 | = this->targ_->glink_section()->address() + glinkoff; | |
4383 | Address from | |
4384 | = (this->stub_address() + cs->second + 24 | |
4385 | + 4 * (ha(off) != 0) | |
4386 | + 4 * (ha(off + 8 + 8 * static_chain) != ha(off)) | |
4387 | + 4 * static_chain); | |
4388 | cmp_branch_off = to - from; | |
4389 | use_fake_dep = cmp_branch_off + (1 << 25) >= (1 << 26); | |
4390 | } | |
4391 | ||
ec661b9d | 4392 | p = oview + cs->second; |
9e69ed50 | 4393 | if (ha(off) != 0) |
ec661b9d | 4394 | { |
b4f7960d AM |
4395 | write_insn<big_endian>(p, std_2_1 + this->targ_->stk_toc()); |
4396 | p += 4; | |
397998fc AM |
4397 | if (plt_load_toc) |
4398 | { | |
4399 | write_insn<big_endian>(p, addis_11_2 + ha(off)); | |
4400 | p += 4; | |
4401 | write_insn<big_endian>(p, ld_12_11 + l(off)); | |
4402 | p += 4; | |
4403 | } | |
4404 | else | |
4405 | { | |
4406 | write_insn<big_endian>(p, addis_12_2 + ha(off)); | |
4407 | p += 4; | |
4408 | write_insn<big_endian>(p, ld_12_12 + l(off)); | |
4409 | p += 4; | |
4410 | } | |
b4f7960d AM |
4411 | if (plt_load_toc |
4412 | && ha(off + 8 + 8 * static_chain) != ha(off)) | |
ec661b9d | 4413 | { |
b4f7960d AM |
4414 | write_insn<big_endian>(p, addi_11_11 + l(off)); |
4415 | p += 4; | |
9e69ed50 | 4416 | off = 0; |
ec661b9d | 4417 | } |
b4f7960d AM |
4418 | write_insn<big_endian>(p, mtctr_12); |
4419 | p += 4; | |
4420 | if (plt_load_toc) | |
9e69ed50 | 4421 | { |
b4f7960d AM |
4422 | if (use_fake_dep) |
4423 | { | |
4424 | write_insn<big_endian>(p, xor_2_12_12); | |
4425 | p += 4; | |
4426 | write_insn<big_endian>(p, add_11_11_2); | |
4427 | p += 4; | |
4428 | } | |
4429 | write_insn<big_endian>(p, ld_2_11 + l(off + 8)); | |
4430 | p += 4; | |
4431 | if (static_chain) | |
4432 | { | |
4433 | write_insn<big_endian>(p, ld_11_11 + l(off + 16)); | |
4434 | p += 4; | |
4435 | } | |
9e69ed50 | 4436 | } |
ec661b9d AM |
4437 | } |
4438 | else | |
4439 | { | |
b4f7960d AM |
4440 | write_insn<big_endian>(p, std_2_1 + this->targ_->stk_toc()); |
4441 | p += 4; | |
4442 | write_insn<big_endian>(p, ld_12_2 + l(off)); | |
4443 | p += 4; | |
4444 | if (plt_load_toc | |
4445 | && ha(off + 8 + 8 * static_chain) != ha(off)) | |
ec661b9d | 4446 | { |
b4f7960d AM |
4447 | write_insn<big_endian>(p, addi_2_2 + l(off)); |
4448 | p += 4; | |
9e69ed50 | 4449 | off = 0; |
ec661b9d | 4450 | } |
b4f7960d AM |
4451 | write_insn<big_endian>(p, mtctr_12); |
4452 | p += 4; | |
4453 | if (plt_load_toc) | |
9e69ed50 | 4454 | { |
b4f7960d AM |
4455 | if (use_fake_dep) |
4456 | { | |
4457 | write_insn<big_endian>(p, xor_11_12_12); | |
4458 | p += 4; | |
4459 | write_insn<big_endian>(p, add_2_2_11); | |
4460 | p += 4; | |
4461 | } | |
4462 | if (static_chain) | |
4463 | { | |
4464 | write_insn<big_endian>(p, ld_11_2 + l(off + 16)); | |
4465 | p += 4; | |
4466 | } | |
4467 | write_insn<big_endian>(p, ld_2_2 + l(off + 8)); | |
4468 | p += 4; | |
9e69ed50 | 4469 | } |
ec661b9d | 4470 | } |
9e69ed50 AM |
4471 | if (thread_safe && !use_fake_dep) |
4472 | { | |
b4f7960d AM |
4473 | write_insn<big_endian>(p, cmpldi_2_0); |
4474 | p += 4; | |
4475 | write_insn<big_endian>(p, bnectr_p4); | |
4476 | p += 4; | |
9e69ed50 AM |
4477 | write_insn<big_endian>(p, b | (cmp_branch_off & 0x3fffffc)); |
4478 | } | |
4479 | else | |
4480 | write_insn<big_endian>(p, bctr); | |
e5d5f5ed | 4481 | } |
ec661b9d AM |
4482 | } |
4483 | ||
4484 | // Write out long branch stubs. | |
4485 | typename Branch_stub_entries::const_iterator bs; | |
4486 | for (bs = this->long_branch_stubs_.begin(); | |
4487 | bs != this->long_branch_stubs_.end(); | |
4488 | ++bs) | |
4489 | { | |
d49044c7 AM |
4490 | if (bs->first.save_res_) |
4491 | continue; | |
ec661b9d AM |
4492 | p = oview + this->plt_size_ + bs->second; |
4493 | Address loc = this->stub_address() + this->plt_size_ + bs->second; | |
4494 | Address delta = bs->first.dest_ - loc; | |
4495 | if (delta + (1 << 25) < 2 << 25) | |
4496 | write_insn<big_endian>(p, b | (delta & 0x3fffffc)); | |
e5d5f5ed | 4497 | else |
cf43a2fe | 4498 | { |
ec661b9d AM |
4499 | Address brlt_addr |
4500 | = this->targ_->find_branch_lookup_table(bs->first.dest_); | |
4501 | gold_assert(brlt_addr != invalid_address); | |
4502 | brlt_addr += this->targ_->brlt_section()->address(); | |
4503 | Address got_addr = got_os_addr + bs->first.toc_base_off_; | |
4504 | Address brltoff = brlt_addr - got_addr; | |
4505 | if (ha(brltoff) == 0) | |
4506 | { | |
b4f7960d | 4507 | write_insn<big_endian>(p, ld_12_2 + l(brltoff)), p += 4; |
ec661b9d AM |
4508 | } |
4509 | else | |
cf43a2fe | 4510 | { |
397998fc AM |
4511 | write_insn<big_endian>(p, addis_12_2 + ha(brltoff)), p += 4; |
4512 | write_insn<big_endian>(p, ld_12_12 + l(brltoff)), p += 4; | |
cf43a2fe | 4513 | } |
b4f7960d | 4514 | write_insn<big_endian>(p, mtctr_12), p += 4; |
ec661b9d | 4515 | write_insn<big_endian>(p, bctr); |
cf43a2fe | 4516 | } |
ec661b9d AM |
4517 | } |
4518 | } | |
4519 | else | |
4520 | { | |
4521 | if (!this->plt_call_stubs_.empty()) | |
4522 | { | |
4523 | // The base address of the .plt section. | |
4524 | Address plt_base = this->targ_->plt_section()->address(); | |
4525 | Address iplt_base = invalid_address; | |
4526 | // The address of _GLOBAL_OFFSET_TABLE_. | |
4527 | Address g_o_t = invalid_address; | |
4528 | ||
4529 | // Write out plt call stubs. | |
4530 | typename Plt_stub_entries::const_iterator cs; | |
4531 | for (cs = this->plt_call_stubs_.begin(); | |
4532 | cs != this->plt_call_stubs_.end(); | |
4533 | ++cs) | |
cf43a2fe | 4534 | { |
91c2b899 AM |
4535 | bool is_iplt; |
4536 | Address plt_addr = this->plt_off(cs, &is_iplt); | |
4537 | if (is_iplt) | |
ec661b9d AM |
4538 | { |
4539 | if (iplt_base == invalid_address) | |
4540 | iplt_base = this->targ_->iplt_section()->address(); | |
4541 | plt_addr += iplt_base; | |
4542 | } | |
4543 | else | |
4544 | plt_addr += plt_base; | |
4545 | ||
4546 | p = oview + cs->second; | |
4547 | if (parameters->options().output_is_position_independent()) | |
4548 | { | |
4549 | Address got_addr; | |
4550 | const Powerpc_relobj<size, big_endian>* ppcobj | |
4551 | = (static_cast<const Powerpc_relobj<size, big_endian>*> | |
4552 | (cs->first.object_)); | |
4553 | if (ppcobj != NULL && cs->first.addend_ >= 32768) | |
4554 | { | |
4555 | unsigned int got2 = ppcobj->got2_shndx(); | |
4556 | got_addr = ppcobj->get_output_section_offset(got2); | |
4557 | gold_assert(got_addr != invalid_address); | |
4558 | got_addr += (ppcobj->output_section(got2)->address() | |
4559 | + cs->first.addend_); | |
4560 | } | |
4561 | else | |
4562 | { | |
4563 | if (g_o_t == invalid_address) | |
4564 | { | |
4565 | const Output_data_got_powerpc<size, big_endian>* got | |
4566 | = this->targ_->got_section(); | |
4567 | g_o_t = got->address() + got->g_o_t(); | |
4568 | } | |
4569 | got_addr = g_o_t; | |
4570 | } | |
4571 | ||
9e69ed50 AM |
4572 | Address off = plt_addr - got_addr; |
4573 | if (ha(off) == 0) | |
ec661b9d | 4574 | { |
9e69ed50 | 4575 | write_insn<big_endian>(p + 0, lwz_11_30 + l(off)); |
ec661b9d AM |
4576 | write_insn<big_endian>(p + 4, mtctr_11); |
4577 | write_insn<big_endian>(p + 8, bctr); | |
4578 | } | |
4579 | else | |
4580 | { | |
9e69ed50 AM |
4581 | write_insn<big_endian>(p + 0, addis_11_30 + ha(off)); |
4582 | write_insn<big_endian>(p + 4, lwz_11_11 + l(off)); | |
ec661b9d AM |
4583 | write_insn<big_endian>(p + 8, mtctr_11); |
4584 | write_insn<big_endian>(p + 12, bctr); | |
4585 | } | |
4586 | } | |
4587 | else | |
4588 | { | |
4589 | write_insn<big_endian>(p + 0, lis_11 + ha(plt_addr)); | |
4590 | write_insn<big_endian>(p + 4, lwz_11_11 + l(plt_addr)); | |
4591 | write_insn<big_endian>(p + 8, mtctr_11); | |
4592 | write_insn<big_endian>(p + 12, bctr); | |
4593 | } | |
4594 | } | |
4595 | } | |
4596 | ||
4597 | // Write out long branch stubs. | |
4598 | typename Branch_stub_entries::const_iterator bs; | |
4599 | for (bs = this->long_branch_stubs_.begin(); | |
4600 | bs != this->long_branch_stubs_.end(); | |
4601 | ++bs) | |
4602 | { | |
d49044c7 AM |
4603 | if (bs->first.save_res_) |
4604 | continue; | |
ec661b9d AM |
4605 | p = oview + this->plt_size_ + bs->second; |
4606 | Address loc = this->stub_address() + this->plt_size_ + bs->second; | |
4607 | Address delta = bs->first.dest_ - loc; | |
4608 | if (delta + (1 << 25) < 2 << 25) | |
4609 | write_insn<big_endian>(p, b | (delta & 0x3fffffc)); | |
4610 | else if (!parameters->options().output_is_position_independent()) | |
4611 | { | |
4612 | write_insn<big_endian>(p + 0, lis_12 + ha(bs->first.dest_)); | |
4613 | write_insn<big_endian>(p + 4, addi_12_12 + l(bs->first.dest_)); | |
4614 | write_insn<big_endian>(p + 8, mtctr_12); | |
4615 | write_insn<big_endian>(p + 12, bctr); | |
4616 | } | |
4617 | else | |
4618 | { | |
4619 | delta -= 8; | |
4620 | write_insn<big_endian>(p + 0, mflr_0); | |
4621 | write_insn<big_endian>(p + 4, bcl_20_31); | |
4622 | write_insn<big_endian>(p + 8, mflr_12); | |
4623 | write_insn<big_endian>(p + 12, addis_12_12 + ha(delta)); | |
4624 | write_insn<big_endian>(p + 16, addi_12_12 + l(delta)); | |
4625 | write_insn<big_endian>(p + 20, mtlr_0); | |
4626 | write_insn<big_endian>(p + 24, mtctr_12); | |
4627 | write_insn<big_endian>(p + 28, bctr); | |
cf43a2fe AM |
4628 | } |
4629 | } | |
ec661b9d | 4630 | } |
d49044c7 AM |
4631 | if (this->need_save_res_) |
4632 | { | |
4633 | p = oview + this->plt_size_ + this->branch_size_; | |
4634 | memcpy (p, this->targ_->savres_section()->contents(), | |
4635 | this->targ_->savres_section()->data_size()); | |
4636 | } | |
ec661b9d AM |
4637 | } |
4638 | ||
4639 | // Write out .glink. | |
4640 | ||
4641 | template<int size, bool big_endian> | |
4642 | void | |
4643 | Output_data_glink<size, big_endian>::do_write(Output_file* of) | |
4644 | { | |
4645 | const section_size_type off = this->offset(); | |
4646 | const section_size_type oview_size = | |
4647 | convert_to_section_size_type(this->data_size()); | |
4648 | unsigned char* const oview = of->get_output_view(off, oview_size); | |
4649 | unsigned char* p; | |
4650 | ||
4651 | // The base address of the .plt section. | |
4652 | typedef typename elfcpp::Elf_types<size>::Elf_Addr Address; | |
4653 | Address plt_base = this->targ_->plt_section()->address(); | |
cf43a2fe | 4654 | |
ec661b9d AM |
4655 | if (size == 64) |
4656 | { | |
9055360d | 4657 | if (this->end_branch_table_ != 0) |
b4f7960d | 4658 | { |
9055360d AM |
4659 | // Write pltresolve stub. |
4660 | p = oview; | |
4661 | Address after_bcl = this->address() + 16; | |
4662 | Address pltoff = plt_base - after_bcl; | |
4663 | ||
4664 | elfcpp::Swap<64, big_endian>::writeval(p, pltoff), p += 8; | |
cf43a2fe | 4665 | |
b4f7960d | 4666 | if (this->targ_->abiversion() < 2) |
cf43a2fe | 4667 | { |
9055360d AM |
4668 | write_insn<big_endian>(p, mflr_12), p += 4; |
4669 | write_insn<big_endian>(p, bcl_20_31), p += 4; | |
4670 | write_insn<big_endian>(p, mflr_11), p += 4; | |
4671 | write_insn<big_endian>(p, ld_2_11 + l(-16)), p += 4; | |
4672 | write_insn<big_endian>(p, mtlr_12), p += 4; | |
4673 | write_insn<big_endian>(p, add_11_2_11), p += 4; | |
4674 | write_insn<big_endian>(p, ld_12_11 + 0), p += 4; | |
4675 | write_insn<big_endian>(p, ld_2_11 + 8), p += 4; | |
4676 | write_insn<big_endian>(p, mtctr_12), p += 4; | |
4677 | write_insn<big_endian>(p, ld_11_11 + 16), p += 4; | |
4678 | } | |
4679 | else | |
4680 | { | |
4681 | write_insn<big_endian>(p, mflr_0), p += 4; | |
4682 | write_insn<big_endian>(p, bcl_20_31), p += 4; | |
4683 | write_insn<big_endian>(p, mflr_11), p += 4; | |
4684 | write_insn<big_endian>(p, ld_2_11 + l(-16)), p += 4; | |
4685 | write_insn<big_endian>(p, mtlr_0), p += 4; | |
4686 | write_insn<big_endian>(p, sub_12_12_11), p += 4; | |
4687 | write_insn<big_endian>(p, add_11_2_11), p += 4; | |
4688 | write_insn<big_endian>(p, addi_0_12 + l(-48)), p += 4; | |
4689 | write_insn<big_endian>(p, ld_12_11 + 0), p += 4; | |
4690 | write_insn<big_endian>(p, srdi_0_0_2), p += 4; | |
4691 | write_insn<big_endian>(p, mtctr_12), p += 4; | |
4692 | write_insn<big_endian>(p, ld_11_11 + 8), p += 4; | |
4693 | } | |
4694 | write_insn<big_endian>(p, bctr), p += 4; | |
4695 | while (p < oview + this->pltresolve_size) | |
4696 | write_insn<big_endian>(p, nop), p += 4; | |
4697 | ||
4698 | // Write lazy link call stubs. | |
4699 | uint32_t indx = 0; | |
4700 | while (p < oview + this->end_branch_table_) | |
4701 | { | |
4702 | if (this->targ_->abiversion() < 2) | |
b4f7960d | 4703 | { |
9055360d AM |
4704 | if (indx < 0x8000) |
4705 | { | |
4706 | write_insn<big_endian>(p, li_0_0 + indx), p += 4; | |
4707 | } | |
4708 | else | |
4709 | { | |
bbec1a5d | 4710 | write_insn<big_endian>(p, lis_0 + hi(indx)), p += 4; |
9055360d AM |
4711 | write_insn<big_endian>(p, ori_0_0_0 + l(indx)), p += 4; |
4712 | } | |
b4f7960d | 4713 | } |
9055360d AM |
4714 | uint32_t branch_off = 8 - (p - oview); |
4715 | write_insn<big_endian>(p, b + (branch_off & 0x3fffffc)), p += 4; | |
4716 | indx++; | |
cf43a2fe | 4717 | } |
9055360d AM |
4718 | } |
4719 | ||
4720 | Address plt_base = this->targ_->plt_section()->address(); | |
4721 | Address iplt_base = invalid_address; | |
4722 | unsigned int global_entry_off = (this->end_branch_table_ + 15) & -16; | |
4723 | Address global_entry_base = this->address() + global_entry_off; | |
4724 | typename Global_entry_stub_entries::const_iterator ge; | |
4725 | for (ge = this->global_entry_stubs_.begin(); | |
4726 | ge != this->global_entry_stubs_.end(); | |
4727 | ++ge) | |
4728 | { | |
4729 | p = oview + global_entry_off + ge->second; | |
4730 | Address plt_addr = ge->first->plt_offset(); | |
4731 | if (ge->first->type() == elfcpp::STT_GNU_IFUNC | |
4732 | && ge->first->can_use_relative_reloc(false)) | |
4733 | { | |
4734 | if (iplt_base == invalid_address) | |
4735 | iplt_base = this->targ_->iplt_section()->address(); | |
4736 | plt_addr += iplt_base; | |
4737 | } | |
4738 | else | |
4739 | plt_addr += plt_base; | |
4740 | Address my_addr = global_entry_base + ge->second; | |
4741 | Address off = plt_addr - my_addr; | |
4742 | ||
4743 | if (off + 0x80008000 > 0xffffffff || (off & 3) != 0) | |
4744 | gold_error(_("%s: linkage table error against `%s'"), | |
4745 | ge->first->object()->name().c_str(), | |
4746 | ge->first->demangled_name().c_str()); | |
4747 | ||
4748 | write_insn<big_endian>(p, addis_12_12 + ha(off)), p += 4; | |
4749 | write_insn<big_endian>(p, ld_12_12 + l(off)), p += 4; | |
4750 | write_insn<big_endian>(p, mtctr_12), p += 4; | |
4751 | write_insn<big_endian>(p, bctr); | |
cf43a2fe AM |
4752 | } |
4753 | } | |
4754 | else | |
4755 | { | |
ec661b9d AM |
4756 | const Output_data_got_powerpc<size, big_endian>* got |
4757 | = this->targ_->got_section(); | |
dd93cd0a AM |
4758 | // The address of _GLOBAL_OFFSET_TABLE_. |
4759 | Address g_o_t = got->address() + got->g_o_t(); | |
c9269dff | 4760 | |
cf43a2fe | 4761 | // Write out pltresolve branch table. |
ec661b9d | 4762 | p = oview; |
cf43a2fe | 4763 | unsigned int the_end = oview_size - this->pltresolve_size; |
c9269dff | 4764 | unsigned char* end_p = oview + the_end; |
cf43a2fe AM |
4765 | while (p < end_p - 8 * 4) |
4766 | write_insn<big_endian>(p, b + end_p - p), p += 4; | |
4767 | while (p < end_p) | |
4768 | write_insn<big_endian>(p, nop), p += 4; | |
42cacb20 | 4769 | |
cf43a2fe AM |
4770 | // Write out pltresolve call stub. |
4771 | if (parameters->options().output_is_position_independent()) | |
42cacb20 | 4772 | { |
ec661b9d | 4773 | Address res0_off = 0; |
dd93cd0a AM |
4774 | Address after_bcl_off = the_end + 12; |
4775 | Address bcl_res0 = after_bcl_off - res0_off; | |
cf43a2fe AM |
4776 | |
4777 | write_insn<big_endian>(p + 0, addis_11_11 + ha(bcl_res0)); | |
4778 | write_insn<big_endian>(p + 4, mflr_0); | |
4779 | write_insn<big_endian>(p + 8, bcl_20_31); | |
4780 | write_insn<big_endian>(p + 12, addi_11_11 + l(bcl_res0)); | |
4781 | write_insn<big_endian>(p + 16, mflr_12); | |
4782 | write_insn<big_endian>(p + 20, mtlr_0); | |
4783 | write_insn<big_endian>(p + 24, sub_11_11_12); | |
4784 | ||
dd93cd0a | 4785 | Address got_bcl = g_o_t + 4 - (after_bcl_off + this->address()); |
cf43a2fe AM |
4786 | |
4787 | write_insn<big_endian>(p + 28, addis_12_12 + ha(got_bcl)); | |
4788 | if (ha(got_bcl) == ha(got_bcl + 4)) | |
4789 | { | |
4790 | write_insn<big_endian>(p + 32, lwz_0_12 + l(got_bcl)); | |
4791 | write_insn<big_endian>(p + 36, lwz_12_12 + l(got_bcl + 4)); | |
4792 | } | |
4793 | else | |
4794 | { | |
4795 | write_insn<big_endian>(p + 32, lwzu_0_12 + l(got_bcl)); | |
4796 | write_insn<big_endian>(p + 36, lwz_12_12 + 4); | |
4797 | } | |
4798 | write_insn<big_endian>(p + 40, mtctr_0); | |
4799 | write_insn<big_endian>(p + 44, add_0_11_11); | |
4800 | write_insn<big_endian>(p + 48, add_11_0_11); | |
4801 | write_insn<big_endian>(p + 52, bctr); | |
4802 | write_insn<big_endian>(p + 56, nop); | |
4803 | write_insn<big_endian>(p + 60, nop); | |
42cacb20 | 4804 | } |
cf43a2fe | 4805 | else |
42cacb20 | 4806 | { |
ec661b9d | 4807 | Address res0 = this->address(); |
cf43a2fe AM |
4808 | |
4809 | write_insn<big_endian>(p + 0, lis_12 + ha(g_o_t + 4)); | |
4810 | write_insn<big_endian>(p + 4, addis_11_11 + ha(-res0)); | |
4811 | if (ha(g_o_t + 4) == ha(g_o_t + 8)) | |
4812 | write_insn<big_endian>(p + 8, lwz_0_12 + l(g_o_t + 4)); | |
4813 | else | |
4814 | write_insn<big_endian>(p + 8, lwzu_0_12 + l(g_o_t + 4)); | |
4815 | write_insn<big_endian>(p + 12, addi_11_11 + l(-res0)); | |
4816 | write_insn<big_endian>(p + 16, mtctr_0); | |
4817 | write_insn<big_endian>(p + 20, add_0_11_11); | |
4818 | if (ha(g_o_t + 4) == ha(g_o_t + 8)) | |
4819 | write_insn<big_endian>(p + 24, lwz_12_12 + l(g_o_t + 8)); | |
4820 | else | |
4821 | write_insn<big_endian>(p + 24, lwz_12_12 + 4); | |
4822 | write_insn<big_endian>(p + 28, add_11_0_11); | |
4823 | write_insn<big_endian>(p + 32, bctr); | |
4824 | write_insn<big_endian>(p + 36, nop); | |
4825 | write_insn<big_endian>(p + 40, nop); | |
4826 | write_insn<big_endian>(p + 44, nop); | |
4827 | write_insn<big_endian>(p + 48, nop); | |
4828 | write_insn<big_endian>(p + 52, nop); | |
4829 | write_insn<big_endian>(p + 56, nop); | |
4830 | write_insn<big_endian>(p + 60, nop); | |
42cacb20 | 4831 | } |
cf43a2fe | 4832 | p += 64; |
42cacb20 DE |
4833 | } |
4834 | ||
cf43a2fe AM |
4835 | of->write_output_view(off, oview_size, oview); |
4836 | } | |
4837 | ||
f3a0ed29 AM |
4838 | |
4839 | // A class to handle linker generated save/restore functions. | |
4840 | ||
4841 | template<int size, bool big_endian> | |
4842 | class Output_data_save_res : public Output_section_data_build | |
4843 | { | |
4844 | public: | |
4845 | Output_data_save_res(Symbol_table* symtab); | |
4846 | ||
d49044c7 AM |
4847 | const unsigned char* |
4848 | contents() const | |
4849 | { | |
4850 | return contents_; | |
4851 | } | |
4852 | ||
f3a0ed29 AM |
4853 | protected: |
4854 | // Write to a map file. | |
4855 | void | |
4856 | do_print_to_mapfile(Mapfile* mapfile) const | |
4857 | { mapfile->print_output_data(this, _("** save/restore")); } | |
4858 | ||
4859 | void | |
4860 | do_write(Output_file*); | |
4861 | ||
4862 | private: | |
4863 | // The maximum size of save/restore contents. | |
4864 | static const unsigned int savres_max = 218*4; | |
4865 | ||
4866 | void | |
4867 | savres_define(Symbol_table* symtab, | |
4868 | const char *name, | |
4869 | unsigned int lo, unsigned int hi, | |
4870 | unsigned char* write_ent(unsigned char*, int), | |
4871 | unsigned char* write_tail(unsigned char*, int)); | |
4872 | ||
4873 | unsigned char *contents_; | |
4874 | }; | |
4875 | ||
4876 | template<bool big_endian> | |
4877 | static unsigned char* | |
4878 | savegpr0(unsigned char* p, int r) | |
4879 | { | |
4880 | uint32_t insn = std_0_1 + (r << 21) + (1 << 16) - (32 - r) * 8; | |
4881 | write_insn<big_endian>(p, insn); | |
4882 | return p + 4; | |
4883 | } | |
4884 | ||
4885 | template<bool big_endian> | |
4886 | static unsigned char* | |
4887 | savegpr0_tail(unsigned char* p, int r) | |
4888 | { | |
4889 | p = savegpr0<big_endian>(p, r); | |
4890 | uint32_t insn = std_0_1 + 16; | |
4891 | write_insn<big_endian>(p, insn); | |
4892 | p = p + 4; | |
4893 | write_insn<big_endian>(p, blr); | |
4894 | return p + 4; | |
4895 | } | |
4896 | ||
4897 | template<bool big_endian> | |
62fe925a | 4898 | static unsigned char* |
f3a0ed29 AM |
4899 | restgpr0(unsigned char* p, int r) |
4900 | { | |
4901 | uint32_t insn = ld_0_1 + (r << 21) + (1 << 16) - (32 - r) * 8; | |
4902 | write_insn<big_endian>(p, insn); | |
4903 | return p + 4; | |
4904 | } | |
4905 | ||
4906 | template<bool big_endian> | |
62fe925a | 4907 | static unsigned char* |
f3a0ed29 AM |
4908 | restgpr0_tail(unsigned char* p, int r) |
4909 | { | |
4910 | uint32_t insn = ld_0_1 + 16; | |
4911 | write_insn<big_endian>(p, insn); | |
4912 | p = p + 4; | |
4913 | p = restgpr0<big_endian>(p, r); | |
4914 | write_insn<big_endian>(p, mtlr_0); | |
4915 | p = p + 4; | |
4916 | if (r == 29) | |
4917 | { | |
4918 | p = restgpr0<big_endian>(p, 30); | |
4919 | p = restgpr0<big_endian>(p, 31); | |
4920 | } | |
4921 | write_insn<big_endian>(p, blr); | |
4922 | return p + 4; | |
4923 | } | |
4924 | ||
4925 | template<bool big_endian> | |
62fe925a | 4926 | static unsigned char* |
f3a0ed29 AM |
4927 | savegpr1(unsigned char* p, int r) |
4928 | { | |
4929 | uint32_t insn = std_0_12 + (r << 21) + (1 << 16) - (32 - r) * 8; | |
4930 | write_insn<big_endian>(p, insn); | |
4931 | return p + 4; | |
4932 | } | |
4933 | ||
4934 | template<bool big_endian> | |
62fe925a | 4935 | static unsigned char* |
f3a0ed29 AM |
4936 | savegpr1_tail(unsigned char* p, int r) |
4937 | { | |
4938 | p = savegpr1<big_endian>(p, r); | |
4939 | write_insn<big_endian>(p, blr); | |
4940 | return p + 4; | |
4941 | } | |
4942 | ||
4943 | template<bool big_endian> | |
62fe925a | 4944 | static unsigned char* |
f3a0ed29 AM |
4945 | restgpr1(unsigned char* p, int r) |
4946 | { | |
4947 | uint32_t insn = ld_0_12 + (r << 21) + (1 << 16) - (32 - r) * 8; | |
4948 | write_insn<big_endian>(p, insn); | |
4949 | return p + 4; | |
4950 | } | |
4951 | ||
4952 | template<bool big_endian> | |
62fe925a | 4953 | static unsigned char* |
f3a0ed29 AM |
4954 | restgpr1_tail(unsigned char* p, int r) |
4955 | { | |
4956 | p = restgpr1<big_endian>(p, r); | |
4957 | write_insn<big_endian>(p, blr); | |
4958 | return p + 4; | |
4959 | } | |
4960 | ||
4961 | template<bool big_endian> | |
62fe925a | 4962 | static unsigned char* |
f3a0ed29 AM |
4963 | savefpr(unsigned char* p, int r) |
4964 | { | |
4965 | uint32_t insn = stfd_0_1 + (r << 21) + (1 << 16) - (32 - r) * 8; | |
4966 | write_insn<big_endian>(p, insn); | |
4967 | return p + 4; | |
4968 | } | |
4969 | ||
4970 | template<bool big_endian> | |
62fe925a | 4971 | static unsigned char* |
f3a0ed29 AM |
4972 | savefpr0_tail(unsigned char* p, int r) |
4973 | { | |
4974 | p = savefpr<big_endian>(p, r); | |
4975 | write_insn<big_endian>(p, std_0_1 + 16); | |
4976 | p = p + 4; | |
4977 | write_insn<big_endian>(p, blr); | |
4978 | return p + 4; | |
4979 | } | |
4980 | ||
4981 | template<bool big_endian> | |
62fe925a | 4982 | static unsigned char* |
f3a0ed29 AM |
4983 | restfpr(unsigned char* p, int r) |
4984 | { | |
4985 | uint32_t insn = lfd_0_1 + (r << 21) + (1 << 16) - (32 - r) * 8; | |
4986 | write_insn<big_endian>(p, insn); | |
4987 | return p + 4; | |
4988 | } | |
4989 | ||
4990 | template<bool big_endian> | |
62fe925a | 4991 | static unsigned char* |
f3a0ed29 AM |
4992 | restfpr0_tail(unsigned char* p, int r) |
4993 | { | |
4994 | write_insn<big_endian>(p, ld_0_1 + 16); | |
4995 | p = p + 4; | |
4996 | p = restfpr<big_endian>(p, r); | |
4997 | write_insn<big_endian>(p, mtlr_0); | |
4998 | p = p + 4; | |
4999 | if (r == 29) | |
5000 | { | |
5001 | p = restfpr<big_endian>(p, 30); | |
5002 | p = restfpr<big_endian>(p, 31); | |
5003 | } | |
5004 | write_insn<big_endian>(p, blr); | |
5005 | return p + 4; | |
5006 | } | |
5007 | ||
5008 | template<bool big_endian> | |
62fe925a | 5009 | static unsigned char* |
f3a0ed29 AM |
5010 | savefpr1_tail(unsigned char* p, int r) |
5011 | { | |
5012 | p = savefpr<big_endian>(p, r); | |
5013 | write_insn<big_endian>(p, blr); | |
5014 | return p + 4; | |
5015 | } | |
5016 | ||
5017 | template<bool big_endian> | |
62fe925a | 5018 | static unsigned char* |
f3a0ed29 AM |
5019 | restfpr1_tail(unsigned char* p, int r) |
5020 | { | |
5021 | p = restfpr<big_endian>(p, r); | |
5022 | write_insn<big_endian>(p, blr); | |
5023 | return p + 4; | |
5024 | } | |
5025 | ||
5026 | template<bool big_endian> | |
62fe925a | 5027 | static unsigned char* |
f3a0ed29 AM |
5028 | savevr(unsigned char* p, int r) |
5029 | { | |
5030 | uint32_t insn = li_12_0 + (1 << 16) - (32 - r) * 16; | |
5031 | write_insn<big_endian>(p, insn); | |
5032 | p = p + 4; | |
5033 | insn = stvx_0_12_0 + (r << 21); | |
5034 | write_insn<big_endian>(p, insn); | |
5035 | return p + 4; | |
5036 | } | |
5037 | ||
5038 | template<bool big_endian> | |
62fe925a | 5039 | static unsigned char* |
f3a0ed29 AM |
5040 | savevr_tail(unsigned char* p, int r) |
5041 | { | |
5042 | p = savevr<big_endian>(p, r); | |
5043 | write_insn<big_endian>(p, blr); | |
5044 | return p + 4; | |
5045 | } | |
5046 | ||
5047 | template<bool big_endian> | |
62fe925a | 5048 | static unsigned char* |
f3a0ed29 AM |
5049 | restvr(unsigned char* p, int r) |
5050 | { | |
5051 | uint32_t insn = li_12_0 + (1 << 16) - (32 - r) * 16; | |
5052 | write_insn<big_endian>(p, insn); | |
5053 | p = p + 4; | |
5054 | insn = lvx_0_12_0 + (r << 21); | |
5055 | write_insn<big_endian>(p, insn); | |
5056 | return p + 4; | |
5057 | } | |
5058 | ||
5059 | template<bool big_endian> | |
62fe925a | 5060 | static unsigned char* |
f3a0ed29 AM |
5061 | restvr_tail(unsigned char* p, int r) |
5062 | { | |
5063 | p = restvr<big_endian>(p, r); | |
5064 | write_insn<big_endian>(p, blr); | |
5065 | return p + 4; | |
5066 | } | |
5067 | ||
5068 | ||
5069 | template<int size, bool big_endian> | |
5070 | Output_data_save_res<size, big_endian>::Output_data_save_res( | |
5071 | Symbol_table* symtab) | |
5072 | : Output_section_data_build(4), | |
5073 | contents_(NULL) | |
5074 | { | |
5075 | this->savres_define(symtab, | |
5076 | "_savegpr0_", 14, 31, | |
5077 | savegpr0<big_endian>, savegpr0_tail<big_endian>); | |
5078 | this->savres_define(symtab, | |
5079 | "_restgpr0_", 14, 29, | |
5080 | restgpr0<big_endian>, restgpr0_tail<big_endian>); | |
5081 | this->savres_define(symtab, | |
5082 | "_restgpr0_", 30, 31, | |
5083 | restgpr0<big_endian>, restgpr0_tail<big_endian>); | |
5084 | this->savres_define(symtab, | |
5085 | "_savegpr1_", 14, 31, | |
5086 | savegpr1<big_endian>, savegpr1_tail<big_endian>); | |
5087 | this->savres_define(symtab, | |
5088 | "_restgpr1_", 14, 31, | |
5089 | restgpr1<big_endian>, restgpr1_tail<big_endian>); | |
5090 | this->savres_define(symtab, | |
5091 | "_savefpr_", 14, 31, | |
5092 | savefpr<big_endian>, savefpr0_tail<big_endian>); | |
5093 | this->savres_define(symtab, | |
5094 | "_restfpr_", 14, 29, | |
5095 | restfpr<big_endian>, restfpr0_tail<big_endian>); | |
5096 | this->savres_define(symtab, | |
5097 | "_restfpr_", 30, 31, | |
5098 | restfpr<big_endian>, restfpr0_tail<big_endian>); | |
5099 | this->savres_define(symtab, | |
5100 | "._savef", 14, 31, | |
5101 | savefpr<big_endian>, savefpr1_tail<big_endian>); | |
5102 | this->savres_define(symtab, | |
5103 | "._restf", 14, 31, | |
5104 | restfpr<big_endian>, restfpr1_tail<big_endian>); | |
5105 | this->savres_define(symtab, | |
5106 | "_savevr_", 20, 31, | |
5107 | savevr<big_endian>, savevr_tail<big_endian>); | |
5108 | this->savres_define(symtab, | |
5109 | "_restvr_", 20, 31, | |
5110 | restvr<big_endian>, restvr_tail<big_endian>); | |
5111 | } | |
5112 | ||
5113 | template<int size, bool big_endian> | |
5114 | void | |
5115 | Output_data_save_res<size, big_endian>::savres_define( | |
5116 | Symbol_table* symtab, | |
5117 | const char *name, | |
5118 | unsigned int lo, unsigned int hi, | |
5119 | unsigned char* write_ent(unsigned char*, int), | |
5120 | unsigned char* write_tail(unsigned char*, int)) | |
5121 | { | |
5122 | size_t len = strlen(name); | |
5123 | bool writing = false; | |
5124 | char sym[16]; | |
5125 | ||
5126 | memcpy(sym, name, len); | |
5127 | sym[len + 2] = 0; | |
5128 | ||
5129 | for (unsigned int i = lo; i <= hi; i++) | |
5130 | { | |
5131 | sym[len + 0] = i / 10 + '0'; | |
5132 | sym[len + 1] = i % 10 + '0'; | |
5133 | Symbol* gsym = symtab->lookup(sym); | |
5134 | bool refd = gsym != NULL && gsym->is_undefined(); | |
5135 | writing = writing || refd; | |
5136 | if (writing) | |
5137 | { | |
5138 | if (this->contents_ == NULL) | |
5139 | this->contents_ = new unsigned char[this->savres_max]; | |
5140 | ||
ec661b9d | 5141 | section_size_type value = this->current_data_size(); |
f3a0ed29 AM |
5142 | unsigned char* p = this->contents_ + value; |
5143 | if (i != hi) | |
5144 | p = write_ent(p, i); | |
5145 | else | |
5146 | p = write_tail(p, i); | |
ec661b9d | 5147 | section_size_type cur_size = p - this->contents_; |
f3a0ed29 AM |
5148 | this->set_current_data_size(cur_size); |
5149 | if (refd) | |
5150 | symtab->define_in_output_data(sym, NULL, Symbol_table::PREDEFINED, | |
5151 | this, value, cur_size - value, | |
5152 | elfcpp::STT_FUNC, elfcpp::STB_GLOBAL, | |
5153 | elfcpp::STV_HIDDEN, 0, false, false); | |
5154 | } | |
5155 | } | |
5156 | } | |
5157 | ||
5158 | // Write out save/restore. | |
5159 | ||
5160 | template<int size, bool big_endian> | |
5161 | void | |
5162 | Output_data_save_res<size, big_endian>::do_write(Output_file* of) | |
5163 | { | |
ec661b9d | 5164 | const section_size_type off = this->offset(); |
f3a0ed29 AM |
5165 | const section_size_type oview_size = |
5166 | convert_to_section_size_type(this->data_size()); | |
5167 | unsigned char* const oview = of->get_output_view(off, oview_size); | |
5168 | memcpy(oview, this->contents_, oview_size); | |
5169 | of->write_output_view(off, oview_size, oview); | |
5170 | } | |
5171 | ||
5172 | ||
cf43a2fe | 5173 | // Create the glink section. |
42cacb20 | 5174 | |
cf43a2fe AM |
5175 | template<int size, bool big_endian> |
5176 | void | |
5177 | Target_powerpc<size, big_endian>::make_glink_section(Layout* layout) | |
5178 | { | |
5179 | if (this->glink_ == NULL) | |
5180 | { | |
5181 | this->glink_ = new Output_data_glink<size, big_endian>(this); | |
9d5781f8 | 5182 | this->glink_->add_eh_frame(layout); |
cf43a2fe AM |
5183 | layout->add_output_section_data(".text", elfcpp::SHT_PROGBITS, |
5184 | elfcpp::SHF_ALLOC | elfcpp::SHF_EXECINSTR, | |
5185 | this->glink_, ORDER_TEXT, false); | |
5186 | } | |
42cacb20 DE |
5187 | } |
5188 | ||
5189 | // Create a PLT entry for a global symbol. | |
5190 | ||
5191 | template<int size, bool big_endian> | |
5192 | void | |
ec661b9d AM |
5193 | Target_powerpc<size, big_endian>::make_plt_entry(Symbol_table* symtab, |
5194 | Layout* layout, | |
5195 | Symbol* gsym) | |
42cacb20 | 5196 | { |
e5d5f5ed AM |
5197 | if (gsym->type() == elfcpp::STT_GNU_IFUNC |
5198 | && gsym->can_use_relative_reloc(false)) | |
5199 | { | |
5200 | if (this->iplt_ == NULL) | |
40b469d7 | 5201 | this->make_iplt_section(symtab, layout); |
03e25981 | 5202 | this->iplt_->add_ifunc_entry(gsym); |
e5d5f5ed AM |
5203 | } |
5204 | else | |
5205 | { | |
5206 | if (this->plt_ == NULL) | |
40b469d7 | 5207 | this->make_plt_section(symtab, layout); |
03e25981 | 5208 | this->plt_->add_entry(gsym); |
e5d5f5ed | 5209 | } |
e5d5f5ed | 5210 | } |
42cacb20 | 5211 | |
e5d5f5ed | 5212 | // Make a PLT entry for a local STT_GNU_IFUNC symbol. |
612a8d3d | 5213 | |
e5d5f5ed AM |
5214 | template<int size, bool big_endian> |
5215 | void | |
5216 | Target_powerpc<size, big_endian>::make_local_ifunc_plt_entry( | |
40b469d7 | 5217 | Symbol_table* symtab, |
e5d5f5ed | 5218 | Layout* layout, |
ec661b9d AM |
5219 | Sized_relobj_file<size, big_endian>* relobj, |
5220 | unsigned int r_sym) | |
e5d5f5ed AM |
5221 | { |
5222 | if (this->iplt_ == NULL) | |
40b469d7 | 5223 | this->make_iplt_section(symtab, layout); |
03e25981 | 5224 | this->iplt_->add_local_ifunc_entry(relobj, r_sym); |
42cacb20 DE |
5225 | } |
5226 | ||
0e70b911 CC |
5227 | // Return the number of entries in the PLT. |
5228 | ||
5229 | template<int size, bool big_endian> | |
5230 | unsigned int | |
5231 | Target_powerpc<size, big_endian>::plt_entry_count() const | |
5232 | { | |
5233 | if (this->plt_ == NULL) | |
5234 | return 0; | |
b3ccdeb5 | 5235 | return this->plt_->entry_count(); |
0e70b911 CC |
5236 | } |
5237 | ||
dd93cd0a | 5238 | // Create a GOT entry for local dynamic __tls_get_addr calls. |
42cacb20 DE |
5239 | |
5240 | template<int size, bool big_endian> | |
5241 | unsigned int | |
dd93cd0a | 5242 | Target_powerpc<size, big_endian>::tlsld_got_offset( |
6fa2a40b CC |
5243 | Symbol_table* symtab, |
5244 | Layout* layout, | |
5245 | Sized_relobj_file<size, big_endian>* object) | |
42cacb20 | 5246 | { |
dd93cd0a | 5247 | if (this->tlsld_got_offset_ == -1U) |
42cacb20 DE |
5248 | { |
5249 | gold_assert(symtab != NULL && layout != NULL && object != NULL); | |
5250 | Reloc_section* rela_dyn = this->rela_dyn_section(layout); | |
dd93cd0a AM |
5251 | Output_data_got_powerpc<size, big_endian>* got |
5252 | = this->got_section(symtab, layout); | |
5253 | unsigned int got_offset = got->add_constant_pair(0, 0); | |
42cacb20 DE |
5254 | rela_dyn->add_local(object, 0, elfcpp::R_POWERPC_DTPMOD, got, |
5255 | got_offset, 0); | |
dd93cd0a | 5256 | this->tlsld_got_offset_ = got_offset; |
42cacb20 | 5257 | } |
dd93cd0a | 5258 | return this->tlsld_got_offset_; |
42cacb20 DE |
5259 | } |
5260 | ||
95a2c8d6 RS |
5261 | // Get the Reference_flags for a particular relocation. |
5262 | ||
5263 | template<int size, bool big_endian> | |
5264 | int | |
88b8e639 AM |
5265 | Target_powerpc<size, big_endian>::Scan::get_reference_flags( |
5266 | unsigned int r_type, | |
5267 | const Target_powerpc* target) | |
95a2c8d6 | 5268 | { |
88b8e639 AM |
5269 | int ref = 0; |
5270 | ||
95a2c8d6 RS |
5271 | switch (r_type) |
5272 | { | |
5273 | case elfcpp::R_POWERPC_NONE: | |
5274 | case elfcpp::R_POWERPC_GNU_VTINHERIT: | |
5275 | case elfcpp::R_POWERPC_GNU_VTENTRY: | |
5276 | case elfcpp::R_PPC64_TOC: | |
5277 | // No symbol reference. | |
88b8e639 | 5278 | break; |
95a2c8d6 | 5279 | |
dd93cd0a AM |
5280 | case elfcpp::R_PPC64_ADDR64: |
5281 | case elfcpp::R_PPC64_UADDR64: | |
5282 | case elfcpp::R_POWERPC_ADDR32: | |
5283 | case elfcpp::R_POWERPC_UADDR32: | |
95a2c8d6 | 5284 | case elfcpp::R_POWERPC_ADDR16: |
dd93cd0a | 5285 | case elfcpp::R_POWERPC_UADDR16: |
95a2c8d6 RS |
5286 | case elfcpp::R_POWERPC_ADDR16_LO: |
5287 | case elfcpp::R_POWERPC_ADDR16_HI: | |
5288 | case elfcpp::R_POWERPC_ADDR16_HA: | |
88b8e639 AM |
5289 | ref = Symbol::ABSOLUTE_REF; |
5290 | break; | |
95a2c8d6 | 5291 | |
dd93cd0a AM |
5292 | case elfcpp::R_POWERPC_ADDR24: |
5293 | case elfcpp::R_POWERPC_ADDR14: | |
5294 | case elfcpp::R_POWERPC_ADDR14_BRTAKEN: | |
5295 | case elfcpp::R_POWERPC_ADDR14_BRNTAKEN: | |
88b8e639 AM |
5296 | ref = Symbol::FUNCTION_CALL | Symbol::ABSOLUTE_REF; |
5297 | break; | |
dd93cd0a | 5298 | |
e5d5f5ed | 5299 | case elfcpp::R_PPC64_REL64: |
dd93cd0a | 5300 | case elfcpp::R_POWERPC_REL32: |
95a2c8d6 | 5301 | case elfcpp::R_PPC_LOCAL24PC: |
6ce78956 AM |
5302 | case elfcpp::R_POWERPC_REL16: |
5303 | case elfcpp::R_POWERPC_REL16_LO: | |
5304 | case elfcpp::R_POWERPC_REL16_HI: | |
5305 | case elfcpp::R_POWERPC_REL16_HA: | |
88b8e639 AM |
5306 | ref = Symbol::RELATIVE_REF; |
5307 | break; | |
95a2c8d6 | 5308 | |
dd93cd0a | 5309 | case elfcpp::R_POWERPC_REL24: |
95a2c8d6 | 5310 | case elfcpp::R_PPC_PLTREL24: |
dd93cd0a AM |
5311 | case elfcpp::R_POWERPC_REL14: |
5312 | case elfcpp::R_POWERPC_REL14_BRTAKEN: | |
5313 | case elfcpp::R_POWERPC_REL14_BRNTAKEN: | |
88b8e639 AM |
5314 | ref = Symbol::FUNCTION_CALL | Symbol::RELATIVE_REF; |
5315 | break; | |
95a2c8d6 RS |
5316 | |
5317 | case elfcpp::R_POWERPC_GOT16: | |
5318 | case elfcpp::R_POWERPC_GOT16_LO: | |
5319 | case elfcpp::R_POWERPC_GOT16_HI: | |
5320 | case elfcpp::R_POWERPC_GOT16_HA: | |
e5d5f5ed AM |
5321 | case elfcpp::R_PPC64_GOT16_DS: |
5322 | case elfcpp::R_PPC64_GOT16_LO_DS: | |
95a2c8d6 RS |
5323 | case elfcpp::R_PPC64_TOC16: |
5324 | case elfcpp::R_PPC64_TOC16_LO: | |
5325 | case elfcpp::R_PPC64_TOC16_HI: | |
5326 | case elfcpp::R_PPC64_TOC16_HA: | |
5327 | case elfcpp::R_PPC64_TOC16_DS: | |
5328 | case elfcpp::R_PPC64_TOC16_LO_DS: | |
32d849b3 | 5329 | ref = Symbol::RELATIVE_REF; |
88b8e639 | 5330 | break; |
95a2c8d6 RS |
5331 | |
5332 | case elfcpp::R_POWERPC_GOT_TPREL16: | |
5333 | case elfcpp::R_POWERPC_TLS: | |
88b8e639 AM |
5334 | ref = Symbol::TLS_REF; |
5335 | break; | |
95a2c8d6 RS |
5336 | |
5337 | case elfcpp::R_POWERPC_COPY: | |
5338 | case elfcpp::R_POWERPC_GLOB_DAT: | |
5339 | case elfcpp::R_POWERPC_JMP_SLOT: | |
5340 | case elfcpp::R_POWERPC_RELATIVE: | |
5341 | case elfcpp::R_POWERPC_DTPMOD: | |
5342 | default: | |
5343 | // Not expected. We will give an error later. | |
88b8e639 | 5344 | break; |
95a2c8d6 | 5345 | } |
88b8e639 AM |
5346 | |
5347 | if (size == 64 && target->abiversion() < 2) | |
5348 | ref |= Symbol::FUNC_DESC_ABI; | |
5349 | return ref; | |
95a2c8d6 RS |
5350 | } |
5351 | ||
42cacb20 DE |
5352 | // Report an unsupported relocation against a local symbol. |
5353 | ||
5354 | template<int size, bool big_endian> | |
5355 | void | |
5356 | Target_powerpc<size, big_endian>::Scan::unsupported_reloc_local( | |
d83ce4e3 AM |
5357 | Sized_relobj_file<size, big_endian>* object, |
5358 | unsigned int r_type) | |
42cacb20 DE |
5359 | { |
5360 | gold_error(_("%s: unsupported reloc %u against local symbol"), | |
5361 | object->name().c_str(), r_type); | |
5362 | } | |
5363 | ||
5364 | // We are about to emit a dynamic relocation of type R_TYPE. If the | |
5365 | // dynamic linker does not support it, issue an error. | |
5366 | ||
5367 | template<int size, bool big_endian> | |
5368 | void | |
5369 | Target_powerpc<size, big_endian>::Scan::check_non_pic(Relobj* object, | |
5370 | unsigned int r_type) | |
5371 | { | |
5372 | gold_assert(r_type != elfcpp::R_POWERPC_NONE); | |
5373 | ||
5374 | // These are the relocation types supported by glibc for both 32-bit | |
5375 | // and 64-bit powerpc. | |
5376 | switch (r_type) | |
5377 | { | |
3ea0a085 | 5378 | case elfcpp::R_POWERPC_NONE: |
42cacb20 DE |
5379 | case elfcpp::R_POWERPC_RELATIVE: |
5380 | case elfcpp::R_POWERPC_GLOB_DAT: | |
5381 | case elfcpp::R_POWERPC_DTPMOD: | |
5382 | case elfcpp::R_POWERPC_DTPREL: | |
5383 | case elfcpp::R_POWERPC_TPREL: | |
5384 | case elfcpp::R_POWERPC_JMP_SLOT: | |
5385 | case elfcpp::R_POWERPC_COPY: | |
3ea0a085 | 5386 | case elfcpp::R_POWERPC_IRELATIVE: |
42cacb20 | 5387 | case elfcpp::R_POWERPC_ADDR32: |
3ea0a085 | 5388 | case elfcpp::R_POWERPC_UADDR32: |
42cacb20 | 5389 | case elfcpp::R_POWERPC_ADDR24: |
3ea0a085 AM |
5390 | case elfcpp::R_POWERPC_ADDR16: |
5391 | case elfcpp::R_POWERPC_UADDR16: | |
5392 | case elfcpp::R_POWERPC_ADDR16_LO: | |
5393 | case elfcpp::R_POWERPC_ADDR16_HI: | |
5394 | case elfcpp::R_POWERPC_ADDR16_HA: | |
5395 | case elfcpp::R_POWERPC_ADDR14: | |
5396 | case elfcpp::R_POWERPC_ADDR14_BRTAKEN: | |
5397 | case elfcpp::R_POWERPC_ADDR14_BRNTAKEN: | |
5398 | case elfcpp::R_POWERPC_REL32: | |
42cacb20 | 5399 | case elfcpp::R_POWERPC_REL24: |
3ea0a085 AM |
5400 | case elfcpp::R_POWERPC_TPREL16: |
5401 | case elfcpp::R_POWERPC_TPREL16_LO: | |
5402 | case elfcpp::R_POWERPC_TPREL16_HI: | |
5403 | case elfcpp::R_POWERPC_TPREL16_HA: | |
42cacb20 DE |
5404 | return; |
5405 | ||
5406 | default: | |
5407 | break; | |
5408 | } | |
5409 | ||
5410 | if (size == 64) | |
5411 | { | |
5412 | switch (r_type) | |
5413 | { | |
5414 | // These are the relocation types supported only on 64-bit. | |
5415 | case elfcpp::R_PPC64_ADDR64: | |
42cacb20 | 5416 | case elfcpp::R_PPC64_UADDR64: |
3ea0a085 | 5417 | case elfcpp::R_PPC64_JMP_IREL: |
42cacb20 | 5418 | case elfcpp::R_PPC64_ADDR16_DS: |
3ea0a085 | 5419 | case elfcpp::R_PPC64_ADDR16_LO_DS: |
f9c6b907 AM |
5420 | case elfcpp::R_PPC64_ADDR16_HIGH: |
5421 | case elfcpp::R_PPC64_ADDR16_HIGHA: | |
42cacb20 DE |
5422 | case elfcpp::R_PPC64_ADDR16_HIGHER: |
5423 | case elfcpp::R_PPC64_ADDR16_HIGHEST: | |
5424 | case elfcpp::R_PPC64_ADDR16_HIGHERA: | |
5425 | case elfcpp::R_PPC64_ADDR16_HIGHESTA: | |
42cacb20 | 5426 | case elfcpp::R_PPC64_REL64: |
3ea0a085 AM |
5427 | case elfcpp::R_POWERPC_ADDR30: |
5428 | case elfcpp::R_PPC64_TPREL16_DS: | |
5429 | case elfcpp::R_PPC64_TPREL16_LO_DS: | |
f9c6b907 AM |
5430 | case elfcpp::R_PPC64_TPREL16_HIGH: |
5431 | case elfcpp::R_PPC64_TPREL16_HIGHA: | |
3ea0a085 AM |
5432 | case elfcpp::R_PPC64_TPREL16_HIGHER: |
5433 | case elfcpp::R_PPC64_TPREL16_HIGHEST: | |
5434 | case elfcpp::R_PPC64_TPREL16_HIGHERA: | |
5435 | case elfcpp::R_PPC64_TPREL16_HIGHESTA: | |
42cacb20 DE |
5436 | return; |
5437 | ||
5438 | default: | |
5439 | break; | |
5440 | } | |
5441 | } | |
5442 | else | |
5443 | { | |
5444 | switch (r_type) | |
5445 | { | |
5446 | // These are the relocation types supported only on 32-bit. | |
3ea0a085 AM |
5447 | // ??? glibc ld.so doesn't need to support these. |
5448 | case elfcpp::R_POWERPC_DTPREL16: | |
5449 | case elfcpp::R_POWERPC_DTPREL16_LO: | |
5450 | case elfcpp::R_POWERPC_DTPREL16_HI: | |
5451 | case elfcpp::R_POWERPC_DTPREL16_HA: | |
5452 | return; | |
42cacb20 DE |
5453 | |
5454 | default: | |
5455 | break; | |
5456 | } | |
5457 | } | |
5458 | ||
5459 | // This prevents us from issuing more than one error per reloc | |
5460 | // section. But we can still wind up issuing more than one | |
5461 | // error per object file. | |
5462 | if (this->issued_non_pic_error_) | |
5463 | return; | |
33aea2fd | 5464 | gold_assert(parameters->options().output_is_position_independent()); |
42cacb20 DE |
5465 | object->error(_("requires unsupported dynamic reloc; " |
5466 | "recompile with -fPIC")); | |
5467 | this->issued_non_pic_error_ = true; | |
5468 | return; | |
5469 | } | |
5470 | ||
e5d5f5ed AM |
5471 | // Return whether we need to make a PLT entry for a relocation of the |
5472 | // given type against a STT_GNU_IFUNC symbol. | |
5473 | ||
5474 | template<int size, bool big_endian> | |
5475 | bool | |
5476 | Target_powerpc<size, big_endian>::Scan::reloc_needs_plt_for_ifunc( | |
9055360d | 5477 | Target_powerpc<size, big_endian>* target, |
e5d5f5ed | 5478 | Sized_relobj_file<size, big_endian>* object, |
b3ccdeb5 AM |
5479 | unsigned int r_type, |
5480 | bool report_err) | |
e5d5f5ed | 5481 | { |
c9824451 AM |
5482 | // In non-pic code any reference will resolve to the plt call stub |
5483 | // for the ifunc symbol. | |
9055360d AM |
5484 | if ((size == 32 || target->abiversion() >= 2) |
5485 | && !parameters->options().output_is_position_independent()) | |
c9824451 AM |
5486 | return true; |
5487 | ||
e5d5f5ed AM |
5488 | switch (r_type) |
5489 | { | |
b3ccdeb5 | 5490 | // Word size refs from data sections are OK, but don't need a PLT entry. |
e5d5f5ed AM |
5491 | case elfcpp::R_POWERPC_ADDR32: |
5492 | case elfcpp::R_POWERPC_UADDR32: | |
5493 | if (size == 32) | |
b3ccdeb5 | 5494 | return false; |
e5d5f5ed AM |
5495 | break; |
5496 | ||
5497 | case elfcpp::R_PPC64_ADDR64: | |
5498 | case elfcpp::R_PPC64_UADDR64: | |
5499 | if (size == 64) | |
b3ccdeb5 | 5500 | return false; |
e5d5f5ed AM |
5501 | break; |
5502 | ||
b3ccdeb5 | 5503 | // GOT refs are good, but also don't need a PLT entry. |
e5d5f5ed AM |
5504 | case elfcpp::R_POWERPC_GOT16: |
5505 | case elfcpp::R_POWERPC_GOT16_LO: | |
5506 | case elfcpp::R_POWERPC_GOT16_HI: | |
5507 | case elfcpp::R_POWERPC_GOT16_HA: | |
5508 | case elfcpp::R_PPC64_GOT16_DS: | |
5509 | case elfcpp::R_PPC64_GOT16_LO_DS: | |
b3ccdeb5 | 5510 | return false; |
e5d5f5ed | 5511 | |
b3ccdeb5 | 5512 | // Function calls are good, and these do need a PLT entry. |
e5d5f5ed AM |
5513 | case elfcpp::R_POWERPC_ADDR24: |
5514 | case elfcpp::R_POWERPC_ADDR14: | |
5515 | case elfcpp::R_POWERPC_ADDR14_BRTAKEN: | |
5516 | case elfcpp::R_POWERPC_ADDR14_BRNTAKEN: | |
5517 | case elfcpp::R_POWERPC_REL24: | |
5518 | case elfcpp::R_PPC_PLTREL24: | |
5519 | case elfcpp::R_POWERPC_REL14: | |
5520 | case elfcpp::R_POWERPC_REL14_BRTAKEN: | |
5521 | case elfcpp::R_POWERPC_REL14_BRNTAKEN: | |
5522 | return true; | |
5523 | ||
5524 | default: | |
5525 | break; | |
5526 | } | |
5527 | ||
5528 | // Anything else is a problem. | |
5529 | // If we are building a static executable, the libc startup function | |
5530 | // responsible for applying indirect function relocations is going | |
5531 | // to complain about the reloc type. | |
5532 | // If we are building a dynamic executable, we will have a text | |
5533 | // relocation. The dynamic loader will set the text segment | |
5534 | // writable and non-executable to apply text relocations. So we'll | |
5535 | // segfault when trying to run the indirection function to resolve | |
5536 | // the reloc. | |
b3ccdeb5 AM |
5537 | if (report_err) |
5538 | gold_error(_("%s: unsupported reloc %u for IFUNC symbol"), | |
e5d5f5ed AM |
5539 | object->name().c_str(), r_type); |
5540 | return false; | |
5541 | } | |
5542 | ||
42cacb20 DE |
5543 | // Scan a relocation for a local symbol. |
5544 | ||
5545 | template<int size, bool big_endian> | |
5546 | inline void | |
5547 | Target_powerpc<size, big_endian>::Scan::local( | |
d83ce4e3 AM |
5548 | Symbol_table* symtab, |
5549 | Layout* layout, | |
5550 | Target_powerpc<size, big_endian>* target, | |
5551 | Sized_relobj_file<size, big_endian>* object, | |
5552 | unsigned int data_shndx, | |
5553 | Output_section* output_section, | |
5554 | const elfcpp::Rela<size, big_endian>& reloc, | |
5555 | unsigned int r_type, | |
e5d5f5ed | 5556 | const elfcpp::Sym<size, big_endian>& lsym, |
bfdfa4cd | 5557 | bool is_discarded) |
42cacb20 | 5558 | { |
e3deeb9c AM |
5559 | this->maybe_skip_tls_get_addr_call(r_type, NULL); |
5560 | ||
5561 | if ((size == 64 && r_type == elfcpp::R_PPC64_TLSGD) | |
5562 | || (size == 32 && r_type == elfcpp::R_PPC_TLSGD)) | |
5563 | { | |
5564 | this->expect_tls_get_addr_call(); | |
5565 | const tls::Tls_optimization tls_type = target->optimize_tls_gd(true); | |
5566 | if (tls_type != tls::TLSOPT_NONE) | |
5567 | this->skip_next_tls_get_addr_call(); | |
5568 | } | |
5569 | else if ((size == 64 && r_type == elfcpp::R_PPC64_TLSLD) | |
5570 | || (size == 32 && r_type == elfcpp::R_PPC_TLSLD)) | |
5571 | { | |
5572 | this->expect_tls_get_addr_call(); | |
5573 | const tls::Tls_optimization tls_type = target->optimize_tls_ld(); | |
5574 | if (tls_type != tls::TLSOPT_NONE) | |
5575 | this->skip_next_tls_get_addr_call(); | |
5576 | } | |
5577 | ||
dd93cd0a AM |
5578 | Powerpc_relobj<size, big_endian>* ppc_object |
5579 | = static_cast<Powerpc_relobj<size, big_endian>*>(object); | |
5580 | ||
bfdfa4cd AM |
5581 | if (is_discarded) |
5582 | { | |
5583 | if (size == 64 | |
5584 | && data_shndx == ppc_object->opd_shndx() | |
5585 | && r_type == elfcpp::R_PPC64_ADDR64) | |
5586 | ppc_object->set_opd_discard(reloc.get_r_offset()); | |
5587 | return; | |
5588 | } | |
5589 | ||
e5d5f5ed AM |
5590 | // A local STT_GNU_IFUNC symbol may require a PLT entry. |
5591 | bool is_ifunc = lsym.get_st_type() == elfcpp::STT_GNU_IFUNC; | |
9055360d | 5592 | if (is_ifunc && this->reloc_needs_plt_for_ifunc(target, object, r_type, true)) |
40b469d7 | 5593 | { |
ec661b9d AM |
5594 | unsigned int r_sym = elfcpp::elf_r_sym<size>(reloc.get_r_info()); |
5595 | target->push_branch(ppc_object, data_shndx, reloc.get_r_offset(), | |
5596 | r_type, r_sym, reloc.get_r_addend()); | |
5597 | target->make_local_ifunc_plt_entry(symtab, layout, object, r_sym); | |
40b469d7 | 5598 | } |
e5d5f5ed | 5599 | |
42cacb20 DE |
5600 | switch (r_type) |
5601 | { | |
5602 | case elfcpp::R_POWERPC_NONE: | |
5603 | case elfcpp::R_POWERPC_GNU_VTINHERIT: | |
5604 | case elfcpp::R_POWERPC_GNU_VTENTRY: | |
6ce78956 | 5605 | case elfcpp::R_PPC64_TOCSAVE: |
7404fe1b | 5606 | case elfcpp::R_POWERPC_TLS: |
dd93cd0a AM |
5607 | break; |
5608 | ||
5609 | case elfcpp::R_PPC64_TOC: | |
5610 | { | |
5611 | Output_data_got_powerpc<size, big_endian>* got | |
5612 | = target->got_section(symtab, layout); | |
5613 | if (parameters->options().output_is_position_independent()) | |
5614 | { | |
bfdfa4cd AM |
5615 | Address off = reloc.get_r_offset(); |
5616 | if (size == 64 | |
9055360d | 5617 | && target->abiversion() < 2 |
bfdfa4cd AM |
5618 | && data_shndx == ppc_object->opd_shndx() |
5619 | && ppc_object->get_opd_discard(off - 8)) | |
5620 | break; | |
5621 | ||
dd93cd0a | 5622 | Reloc_section* rela_dyn = target->rela_dyn_section(layout); |
bfdfa4cd | 5623 | Powerpc_relobj<size, big_endian>* symobj = ppc_object; |
dd93cd0a AM |
5624 | rela_dyn->add_output_section_relative(got->output_section(), |
5625 | elfcpp::R_POWERPC_RELATIVE, | |
5626 | output_section, | |
bfdfa4cd AM |
5627 | object, data_shndx, off, |
5628 | symobj->toc_base_offset()); | |
dd93cd0a AM |
5629 | } |
5630 | } | |
42cacb20 DE |
5631 | break; |
5632 | ||
5633 | case elfcpp::R_PPC64_ADDR64: | |
dd93cd0a | 5634 | case elfcpp::R_PPC64_UADDR64: |
42cacb20 | 5635 | case elfcpp::R_POWERPC_ADDR32: |
dd93cd0a AM |
5636 | case elfcpp::R_POWERPC_UADDR32: |
5637 | case elfcpp::R_POWERPC_ADDR24: | |
c9269dff | 5638 | case elfcpp::R_POWERPC_ADDR16: |
42cacb20 | 5639 | case elfcpp::R_POWERPC_ADDR16_LO: |
c9269dff AM |
5640 | case elfcpp::R_POWERPC_ADDR16_HI: |
5641 | case elfcpp::R_POWERPC_ADDR16_HA: | |
dd93cd0a | 5642 | case elfcpp::R_POWERPC_UADDR16: |
f9c6b907 AM |
5643 | case elfcpp::R_PPC64_ADDR16_HIGH: |
5644 | case elfcpp::R_PPC64_ADDR16_HIGHA: | |
dd93cd0a AM |
5645 | case elfcpp::R_PPC64_ADDR16_HIGHER: |
5646 | case elfcpp::R_PPC64_ADDR16_HIGHERA: | |
5647 | case elfcpp::R_PPC64_ADDR16_HIGHEST: | |
5648 | case elfcpp::R_PPC64_ADDR16_HIGHESTA: | |
5649 | case elfcpp::R_PPC64_ADDR16_DS: | |
5650 | case elfcpp::R_PPC64_ADDR16_LO_DS: | |
5651 | case elfcpp::R_POWERPC_ADDR14: | |
5652 | case elfcpp::R_POWERPC_ADDR14_BRTAKEN: | |
5653 | case elfcpp::R_POWERPC_ADDR14_BRNTAKEN: | |
42cacb20 DE |
5654 | // If building a shared library (or a position-independent |
5655 | // executable), we need to create a dynamic relocation for | |
5656 | // this location. | |
c9824451 | 5657 | if (parameters->options().output_is_position_independent() |
9055360d | 5658 | || (size == 64 && is_ifunc && target->abiversion() < 2)) |
2e702c99 | 5659 | { |
b3ccdeb5 AM |
5660 | Reloc_section* rela_dyn = target->rela_dyn_section(symtab, layout, |
5661 | is_ifunc); | |
1f98a074 | 5662 | unsigned int r_sym = elfcpp::elf_r_sym<size>(reloc.get_r_info()); |
dd93cd0a AM |
5663 | if ((size == 32 && r_type == elfcpp::R_POWERPC_ADDR32) |
5664 | || (size == 64 && r_type == elfcpp::R_PPC64_ADDR64)) | |
2e702c99 | 5665 | { |
b3ccdeb5 AM |
5666 | unsigned int dynrel = (is_ifunc ? elfcpp::R_POWERPC_IRELATIVE |
5667 | : elfcpp::R_POWERPC_RELATIVE); | |
e5d5f5ed | 5668 | rela_dyn->add_local_relative(object, r_sym, dynrel, |
dd93cd0a AM |
5669 | output_section, data_shndx, |
5670 | reloc.get_r_offset(), | |
c9824451 | 5671 | reloc.get_r_addend(), false); |
2e702c99 | 5672 | } |
1f98a074 | 5673 | else if (lsym.get_st_type() != elfcpp::STT_SECTION) |
2e702c99 | 5674 | { |
dd93cd0a | 5675 | check_non_pic(object, r_type); |
dd93cd0a AM |
5676 | rela_dyn->add_local(object, r_sym, r_type, output_section, |
5677 | data_shndx, reloc.get_r_offset(), | |
5678 | reloc.get_r_addend()); | |
2e702c99 | 5679 | } |
1f98a074 AM |
5680 | else |
5681 | { | |
5682 | gold_assert(lsym.get_st_value() == 0); | |
5683 | unsigned int shndx = lsym.get_st_shndx(); | |
5684 | bool is_ordinary; | |
5685 | shndx = object->adjust_sym_shndx(r_sym, shndx, | |
5686 | &is_ordinary); | |
5687 | if (!is_ordinary) | |
5688 | object->error(_("section symbol %u has bad shndx %u"), | |
5689 | r_sym, shndx); | |
5690 | else | |
5691 | rela_dyn->add_local_section(object, shndx, r_type, | |
5692 | output_section, data_shndx, | |
5693 | reloc.get_r_offset()); | |
5694 | } | |
2e702c99 | 5695 | } |
42cacb20 DE |
5696 | break; |
5697 | ||
5698 | case elfcpp::R_POWERPC_REL24: | |
c9824451 | 5699 | case elfcpp::R_PPC_PLTREL24: |
42cacb20 | 5700 | case elfcpp::R_PPC_LOCAL24PC: |
ec661b9d AM |
5701 | case elfcpp::R_POWERPC_REL14: |
5702 | case elfcpp::R_POWERPC_REL14_BRTAKEN: | |
5703 | case elfcpp::R_POWERPC_REL14_BRNTAKEN: | |
b3ccdeb5 AM |
5704 | if (!is_ifunc) |
5705 | target->push_branch(ppc_object, data_shndx, reloc.get_r_offset(), | |
5706 | r_type, elfcpp::elf_r_sym<size>(reloc.get_r_info()), | |
5707 | reloc.get_r_addend()); | |
ec661b9d AM |
5708 | break; |
5709 | ||
5710 | case elfcpp::R_PPC64_REL64: | |
5711 | case elfcpp::R_POWERPC_REL32: | |
dd93cd0a | 5712 | case elfcpp::R_POWERPC_REL16: |
6ce78956 | 5713 | case elfcpp::R_POWERPC_REL16_LO: |
dd93cd0a | 5714 | case elfcpp::R_POWERPC_REL16_HI: |
6ce78956 | 5715 | case elfcpp::R_POWERPC_REL16_HA: |
a680de9a | 5716 | case elfcpp::R_POWERPC_REL16DX_HA: |
dd93cd0a | 5717 | case elfcpp::R_POWERPC_SECTOFF: |
dd93cd0a | 5718 | case elfcpp::R_POWERPC_SECTOFF_LO: |
dd93cd0a | 5719 | case elfcpp::R_POWERPC_SECTOFF_HI: |
dd93cd0a | 5720 | case elfcpp::R_POWERPC_SECTOFF_HA: |
f9c6b907 AM |
5721 | case elfcpp::R_PPC64_SECTOFF_DS: |
5722 | case elfcpp::R_PPC64_SECTOFF_LO_DS: | |
5723 | case elfcpp::R_POWERPC_TPREL16: | |
5724 | case elfcpp::R_POWERPC_TPREL16_LO: | |
5725 | case elfcpp::R_POWERPC_TPREL16_HI: | |
dd93cd0a | 5726 | case elfcpp::R_POWERPC_TPREL16_HA: |
f9c6b907 AM |
5727 | case elfcpp::R_PPC64_TPREL16_DS: |
5728 | case elfcpp::R_PPC64_TPREL16_LO_DS: | |
5729 | case elfcpp::R_PPC64_TPREL16_HIGH: | |
5730 | case elfcpp::R_PPC64_TPREL16_HIGHA: | |
dd93cd0a | 5731 | case elfcpp::R_PPC64_TPREL16_HIGHER: |
dd93cd0a | 5732 | case elfcpp::R_PPC64_TPREL16_HIGHERA: |
dd93cd0a | 5733 | case elfcpp::R_PPC64_TPREL16_HIGHEST: |
dd93cd0a | 5734 | case elfcpp::R_PPC64_TPREL16_HIGHESTA: |
f9c6b907 AM |
5735 | case elfcpp::R_POWERPC_DTPREL16: |
5736 | case elfcpp::R_POWERPC_DTPREL16_LO: | |
5737 | case elfcpp::R_POWERPC_DTPREL16_HI: | |
5738 | case elfcpp::R_POWERPC_DTPREL16_HA: | |
dd93cd0a AM |
5739 | case elfcpp::R_PPC64_DTPREL16_DS: |
5740 | case elfcpp::R_PPC64_DTPREL16_LO_DS: | |
f9c6b907 AM |
5741 | case elfcpp::R_PPC64_DTPREL16_HIGH: |
5742 | case elfcpp::R_PPC64_DTPREL16_HIGHA: | |
5743 | case elfcpp::R_PPC64_DTPREL16_HIGHER: | |
5744 | case elfcpp::R_PPC64_DTPREL16_HIGHERA: | |
5745 | case elfcpp::R_PPC64_DTPREL16_HIGHEST: | |
5746 | case elfcpp::R_PPC64_DTPREL16_HIGHESTA: | |
dd93cd0a AM |
5747 | case elfcpp::R_PPC64_TLSGD: |
5748 | case elfcpp::R_PPC64_TLSLD: | |
45965137 | 5749 | case elfcpp::R_PPC64_ADDR64_LOCAL: |
42cacb20 DE |
5750 | break; |
5751 | ||
5752 | case elfcpp::R_POWERPC_GOT16: | |
5753 | case elfcpp::R_POWERPC_GOT16_LO: | |
5754 | case elfcpp::R_POWERPC_GOT16_HI: | |
5755 | case elfcpp::R_POWERPC_GOT16_HA: | |
dd93cd0a AM |
5756 | case elfcpp::R_PPC64_GOT16_DS: |
5757 | case elfcpp::R_PPC64_GOT16_LO_DS: | |
42cacb20 | 5758 | { |
c9269dff | 5759 | // The symbol requires a GOT entry. |
dd93cd0a AM |
5760 | Output_data_got_powerpc<size, big_endian>* got |
5761 | = target->got_section(symtab, layout); | |
5762 | unsigned int r_sym = elfcpp::elf_r_sym<size>(reloc.get_r_info()); | |
42cacb20 | 5763 | |
e5d5f5ed | 5764 | if (!parameters->options().output_is_position_independent()) |
42cacb20 | 5765 | { |
b01a4b04 AM |
5766 | if (is_ifunc |
5767 | && (size == 32 || target->abiversion() >= 2)) | |
e5d5f5ed AM |
5768 | got->add_local_plt(object, r_sym, GOT_TYPE_STANDARD); |
5769 | else | |
5770 | got->add_local(object, r_sym, GOT_TYPE_STANDARD); | |
5771 | } | |
5772 | else if (!object->local_has_got_offset(r_sym, GOT_TYPE_STANDARD)) | |
5773 | { | |
5774 | // If we are generating a shared object or a pie, this | |
5775 | // symbol's GOT entry will be set by a dynamic relocation. | |
5776 | unsigned int off; | |
5777 | off = got->add_constant(0); | |
5778 | object->set_local_got_offset(r_sym, GOT_TYPE_STANDARD, off); | |
42cacb20 | 5779 | |
b3ccdeb5 AM |
5780 | Reloc_section* rela_dyn = target->rela_dyn_section(symtab, layout, |
5781 | is_ifunc); | |
5782 | unsigned int dynrel = (is_ifunc ? elfcpp::R_POWERPC_IRELATIVE | |
5783 | : elfcpp::R_POWERPC_RELATIVE); | |
e5d5f5ed | 5784 | rela_dyn->add_local_relative(object, r_sym, dynrel, |
c9824451 | 5785 | got, off, 0, false); |
2e702c99 | 5786 | } |
42cacb20 DE |
5787 | } |
5788 | break; | |
5789 | ||
cf43a2fe AM |
5790 | case elfcpp::R_PPC64_TOC16: |
5791 | case elfcpp::R_PPC64_TOC16_LO: | |
5792 | case elfcpp::R_PPC64_TOC16_HI: | |
5793 | case elfcpp::R_PPC64_TOC16_HA: | |
5794 | case elfcpp::R_PPC64_TOC16_DS: | |
5795 | case elfcpp::R_PPC64_TOC16_LO_DS: | |
42cacb20 DE |
5796 | // We need a GOT section. |
5797 | target->got_section(symtab, layout); | |
5798 | break; | |
5799 | ||
dd93cd0a AM |
5800 | case elfcpp::R_POWERPC_GOT_TLSGD16: |
5801 | case elfcpp::R_POWERPC_GOT_TLSGD16_LO: | |
5802 | case elfcpp::R_POWERPC_GOT_TLSGD16_HI: | |
5803 | case elfcpp::R_POWERPC_GOT_TLSGD16_HA: | |
5804 | { | |
5805 | const tls::Tls_optimization tls_type = target->optimize_tls_gd(true); | |
5806 | if (tls_type == tls::TLSOPT_NONE) | |
5807 | { | |
5808 | Output_data_got_powerpc<size, big_endian>* got | |
5809 | = target->got_section(symtab, layout); | |
5810 | unsigned int r_sym = elfcpp::elf_r_sym<size>(reloc.get_r_info()); | |
bd73a62d AM |
5811 | Reloc_section* rela_dyn = target->rela_dyn_section(layout); |
5812 | got->add_local_tls_pair(object, r_sym, GOT_TYPE_TLSGD, | |
5813 | rela_dyn, elfcpp::R_POWERPC_DTPMOD); | |
dd93cd0a AM |
5814 | } |
5815 | else if (tls_type == tls::TLSOPT_TO_LE) | |
5816 | { | |
5817 | // no GOT relocs needed for Local Exec. | |
5818 | } | |
5819 | else | |
5820 | gold_unreachable(); | |
5821 | } | |
42cacb20 DE |
5822 | break; |
5823 | ||
dd93cd0a AM |
5824 | case elfcpp::R_POWERPC_GOT_TLSLD16: |
5825 | case elfcpp::R_POWERPC_GOT_TLSLD16_LO: | |
5826 | case elfcpp::R_POWERPC_GOT_TLSLD16_HI: | |
5827 | case elfcpp::R_POWERPC_GOT_TLSLD16_HA: | |
5828 | { | |
5829 | const tls::Tls_optimization tls_type = target->optimize_tls_ld(); | |
5830 | if (tls_type == tls::TLSOPT_NONE) | |
5831 | target->tlsld_got_offset(symtab, layout, object); | |
5832 | else if (tls_type == tls::TLSOPT_TO_LE) | |
5833 | { | |
5834 | // no GOT relocs needed for Local Exec. | |
7404fe1b AM |
5835 | if (parameters->options().emit_relocs()) |
5836 | { | |
5837 | Output_section* os = layout->tls_segment()->first_section(); | |
5838 | gold_assert(os != NULL); | |
5839 | os->set_needs_symtab_index(); | |
5840 | } | |
dd93cd0a AM |
5841 | } |
5842 | else | |
5843 | gold_unreachable(); | |
5844 | } | |
42cacb20 | 5845 | break; |
42cacb20 | 5846 | |
dd93cd0a AM |
5847 | case elfcpp::R_POWERPC_GOT_DTPREL16: |
5848 | case elfcpp::R_POWERPC_GOT_DTPREL16_LO: | |
5849 | case elfcpp::R_POWERPC_GOT_DTPREL16_HI: | |
5850 | case elfcpp::R_POWERPC_GOT_DTPREL16_HA: | |
5851 | { | |
5852 | Output_data_got_powerpc<size, big_endian>* got | |
5853 | = target->got_section(symtab, layout); | |
5854 | unsigned int r_sym = elfcpp::elf_r_sym<size>(reloc.get_r_info()); | |
bd73a62d | 5855 | got->add_local_tls(object, r_sym, GOT_TYPE_DTPREL); |
dd93cd0a AM |
5856 | } |
5857 | break; | |
42cacb20 | 5858 | |
dd93cd0a AM |
5859 | case elfcpp::R_POWERPC_GOT_TPREL16: |
5860 | case elfcpp::R_POWERPC_GOT_TPREL16_LO: | |
5861 | case elfcpp::R_POWERPC_GOT_TPREL16_HI: | |
5862 | case elfcpp::R_POWERPC_GOT_TPREL16_HA: | |
5863 | { | |
5864 | const tls::Tls_optimization tls_type = target->optimize_tls_ie(true); | |
5865 | if (tls_type == tls::TLSOPT_NONE) | |
5866 | { | |
dd93cd0a | 5867 | unsigned int r_sym = elfcpp::elf_r_sym<size>(reloc.get_r_info()); |
acc276d8 AM |
5868 | if (!object->local_has_got_offset(r_sym, GOT_TYPE_TPREL)) |
5869 | { | |
5870 | Output_data_got_powerpc<size, big_endian>* got | |
5871 | = target->got_section(symtab, layout); | |
5872 | unsigned int off = got->add_constant(0); | |
5873 | object->set_local_got_offset(r_sym, GOT_TYPE_TPREL, off); | |
5874 | ||
5875 | Reloc_section* rela_dyn = target->rela_dyn_section(layout); | |
5876 | rela_dyn->add_symbolless_local_addend(object, r_sym, | |
5877 | elfcpp::R_POWERPC_TPREL, | |
5878 | got, off, 0); | |
5879 | } | |
dd93cd0a AM |
5880 | } |
5881 | else if (tls_type == tls::TLSOPT_TO_LE) | |
5882 | { | |
5883 | // no GOT relocs needed for Local Exec. | |
5884 | } | |
5885 | else | |
5886 | gold_unreachable(); | |
5887 | } | |
5888 | break; | |
5889 | ||
5890 | default: | |
5891 | unsupported_reloc_local(object, r_type); | |
5892 | break; | |
5893 | } | |
d8f5a274 AM |
5894 | |
5895 | switch (r_type) | |
5896 | { | |
5897 | case elfcpp::R_POWERPC_GOT_TLSLD16: | |
5898 | case elfcpp::R_POWERPC_GOT_TLSGD16: | |
5899 | case elfcpp::R_POWERPC_GOT_TPREL16: | |
5900 | case elfcpp::R_POWERPC_GOT_DTPREL16: | |
5901 | case elfcpp::R_POWERPC_GOT16: | |
5902 | case elfcpp::R_PPC64_GOT16_DS: | |
5903 | case elfcpp::R_PPC64_TOC16: | |
5904 | case elfcpp::R_PPC64_TOC16_DS: | |
5905 | ppc_object->set_has_small_toc_reloc(); | |
5906 | default: | |
5907 | break; | |
5908 | } | |
dd93cd0a AM |
5909 | } |
5910 | ||
5911 | // Report an unsupported relocation against a global symbol. | |
5912 | ||
5913 | template<int size, bool big_endian> | |
5914 | void | |
5915 | Target_powerpc<size, big_endian>::Scan::unsupported_reloc_global( | |
5916 | Sized_relobj_file<size, big_endian>* object, | |
5917 | unsigned int r_type, | |
5918 | Symbol* gsym) | |
5919 | { | |
42cacb20 DE |
5920 | gold_error(_("%s: unsupported reloc %u against global symbol %s"), |
5921 | object->name().c_str(), r_type, gsym->demangled_name().c_str()); | |
5922 | } | |
5923 | ||
5924 | // Scan a relocation for a global symbol. | |
5925 | ||
5926 | template<int size, bool big_endian> | |
5927 | inline void | |
5928 | Target_powerpc<size, big_endian>::Scan::global( | |
d83ce4e3 AM |
5929 | Symbol_table* symtab, |
5930 | Layout* layout, | |
5931 | Target_powerpc<size, big_endian>* target, | |
5932 | Sized_relobj_file<size, big_endian>* object, | |
5933 | unsigned int data_shndx, | |
5934 | Output_section* output_section, | |
5935 | const elfcpp::Rela<size, big_endian>& reloc, | |
5936 | unsigned int r_type, | |
5937 | Symbol* gsym) | |
42cacb20 | 5938 | { |
e3deeb9c AM |
5939 | if (this->maybe_skip_tls_get_addr_call(r_type, gsym) == Track_tls::SKIP) |
5940 | return; | |
5941 | ||
5942 | if ((size == 64 && r_type == elfcpp::R_PPC64_TLSGD) | |
5943 | || (size == 32 && r_type == elfcpp::R_PPC_TLSGD)) | |
5944 | { | |
5945 | this->expect_tls_get_addr_call(); | |
5946 | const bool final = gsym->final_value_is_known(); | |
5947 | const tls::Tls_optimization tls_type = target->optimize_tls_gd(final); | |
5948 | if (tls_type != tls::TLSOPT_NONE) | |
5949 | this->skip_next_tls_get_addr_call(); | |
5950 | } | |
5951 | else if ((size == 64 && r_type == elfcpp::R_PPC64_TLSLD) | |
5952 | || (size == 32 && r_type == elfcpp::R_PPC_TLSLD)) | |
5953 | { | |
5954 | this->expect_tls_get_addr_call(); | |
5955 | const tls::Tls_optimization tls_type = target->optimize_tls_ld(); | |
5956 | if (tls_type != tls::TLSOPT_NONE) | |
5957 | this->skip_next_tls_get_addr_call(); | |
5958 | } | |
5959 | ||
dd93cd0a AM |
5960 | Powerpc_relobj<size, big_endian>* ppc_object |
5961 | = static_cast<Powerpc_relobj<size, big_endian>*>(object); | |
5962 | ||
e5d5f5ed | 5963 | // A STT_GNU_IFUNC symbol may require a PLT entry. |
b3ccdeb5 | 5964 | bool is_ifunc = gsym->type() == elfcpp::STT_GNU_IFUNC; |
9055360d AM |
5965 | bool pushed_ifunc = false; |
5966 | if (is_ifunc && this->reloc_needs_plt_for_ifunc(target, object, r_type, true)) | |
ec661b9d AM |
5967 | { |
5968 | target->push_branch(ppc_object, data_shndx, reloc.get_r_offset(), | |
5969 | r_type, elfcpp::elf_r_sym<size>(reloc.get_r_info()), | |
5970 | reloc.get_r_addend()); | |
5971 | target->make_plt_entry(symtab, layout, gsym); | |
9055360d | 5972 | pushed_ifunc = true; |
ec661b9d | 5973 | } |
e5d5f5ed | 5974 | |
42cacb20 DE |
5975 | switch (r_type) |
5976 | { | |
5977 | case elfcpp::R_POWERPC_NONE: | |
5978 | case elfcpp::R_POWERPC_GNU_VTINHERIT: | |
5979 | case elfcpp::R_POWERPC_GNU_VTENTRY: | |
cf43a2fe | 5980 | case elfcpp::R_PPC_LOCAL24PC: |
7404fe1b | 5981 | case elfcpp::R_POWERPC_TLS: |
dd93cd0a AM |
5982 | break; |
5983 | ||
5984 | case elfcpp::R_PPC64_TOC: | |
5985 | { | |
5986 | Output_data_got_powerpc<size, big_endian>* got | |
5987 | = target->got_section(symtab, layout); | |
5988 | if (parameters->options().output_is_position_independent()) | |
5989 | { | |
bfdfa4cd AM |
5990 | Address off = reloc.get_r_offset(); |
5991 | if (size == 64 | |
5992 | && data_shndx == ppc_object->opd_shndx() | |
5993 | && ppc_object->get_opd_discard(off - 8)) | |
5994 | break; | |
5995 | ||
dd93cd0a AM |
5996 | Reloc_section* rela_dyn = target->rela_dyn_section(layout); |
5997 | Powerpc_relobj<size, big_endian>* symobj = ppc_object; | |
5998 | if (data_shndx != ppc_object->opd_shndx()) | |
5999 | symobj = static_cast | |
6000 | <Powerpc_relobj<size, big_endian>*>(gsym->object()); | |
6001 | rela_dyn->add_output_section_relative(got->output_section(), | |
6002 | elfcpp::R_POWERPC_RELATIVE, | |
6003 | output_section, | |
bfdfa4cd | 6004 | object, data_shndx, off, |
dd93cd0a AM |
6005 | symobj->toc_base_offset()); |
6006 | } | |
6007 | } | |
42cacb20 DE |
6008 | break; |
6009 | ||
c9269dff | 6010 | case elfcpp::R_PPC64_ADDR64: |
bfdfa4cd | 6011 | if (size == 64 |
9055360d | 6012 | && target->abiversion() < 2 |
bfdfa4cd AM |
6013 | && data_shndx == ppc_object->opd_shndx() |
6014 | && (gsym->is_defined_in_discarded_section() | |
6015 | || gsym->object() != object)) | |
6016 | { | |
6017 | ppc_object->set_opd_discard(reloc.get_r_offset()); | |
6018 | break; | |
6019 | } | |
6020 | // Fall thru | |
dd93cd0a | 6021 | case elfcpp::R_PPC64_UADDR64: |
c9269dff | 6022 | case elfcpp::R_POWERPC_ADDR32: |
dd93cd0a AM |
6023 | case elfcpp::R_POWERPC_UADDR32: |
6024 | case elfcpp::R_POWERPC_ADDR24: | |
42cacb20 DE |
6025 | case elfcpp::R_POWERPC_ADDR16: |
6026 | case elfcpp::R_POWERPC_ADDR16_LO: | |
6027 | case elfcpp::R_POWERPC_ADDR16_HI: | |
6028 | case elfcpp::R_POWERPC_ADDR16_HA: | |
dd93cd0a | 6029 | case elfcpp::R_POWERPC_UADDR16: |
f9c6b907 AM |
6030 | case elfcpp::R_PPC64_ADDR16_HIGH: |
6031 | case elfcpp::R_PPC64_ADDR16_HIGHA: | |
dd93cd0a AM |
6032 | case elfcpp::R_PPC64_ADDR16_HIGHER: |
6033 | case elfcpp::R_PPC64_ADDR16_HIGHERA: | |
6034 | case elfcpp::R_PPC64_ADDR16_HIGHEST: | |
6035 | case elfcpp::R_PPC64_ADDR16_HIGHESTA: | |
6036 | case elfcpp::R_PPC64_ADDR16_DS: | |
6037 | case elfcpp::R_PPC64_ADDR16_LO_DS: | |
6038 | case elfcpp::R_POWERPC_ADDR14: | |
6039 | case elfcpp::R_POWERPC_ADDR14_BRTAKEN: | |
6040 | case elfcpp::R_POWERPC_ADDR14_BRNTAKEN: | |
42cacb20 | 6041 | { |
c9269dff AM |
6042 | // Make a PLT entry if necessary. |
6043 | if (gsym->needs_plt_entry()) | |
6044 | { | |
9055360d AM |
6045 | // Since this is not a PC-relative relocation, we may be |
6046 | // taking the address of a function. In that case we need to | |
6047 | // set the entry in the dynamic symbol table to the address of | |
6048 | // the PLT call stub. | |
6049 | bool need_ifunc_plt = false; | |
6050 | if ((size == 32 || target->abiversion() >= 2) | |
6051 | && gsym->is_from_dynobj() | |
6052 | && !parameters->options().output_is_position_independent()) | |
6053 | { | |
6054 | gsym->set_needs_dynsym_value(); | |
6055 | need_ifunc_plt = true; | |
6056 | } | |
6057 | if (!is_ifunc || (!pushed_ifunc && need_ifunc_plt)) | |
b3ccdeb5 AM |
6058 | { |
6059 | target->push_branch(ppc_object, data_shndx, | |
6060 | reloc.get_r_offset(), r_type, | |
6061 | elfcpp::elf_r_sym<size>(reloc.get_r_info()), | |
6062 | reloc.get_r_addend()); | |
6063 | target->make_plt_entry(symtab, layout, gsym); | |
6064 | } | |
c9269dff AM |
6065 | } |
6066 | // Make a dynamic relocation if necessary. | |
88b8e639 | 6067 | if (gsym->needs_dynamic_reloc(Scan::get_reference_flags(r_type, target)) |
9055360d | 6068 | || (size == 64 && is_ifunc && target->abiversion() < 2)) |
c9269dff | 6069 | { |
a82bef93 ST |
6070 | if (!parameters->options().output_is_position_independent() |
6071 | && gsym->may_need_copy_reloc()) | |
c9269dff AM |
6072 | { |
6073 | target->copy_reloc(symtab, layout, object, | |
6074 | data_shndx, output_section, gsym, reloc); | |
6075 | } | |
9055360d AM |
6076 | else if ((((size == 32 |
6077 | && r_type == elfcpp::R_POWERPC_ADDR32) | |
6078 | || (size == 64 | |
6079 | && r_type == elfcpp::R_PPC64_ADDR64 | |
6080 | && target->abiversion() >= 2)) | |
627b30b7 AM |
6081 | && gsym->can_use_relative_reloc(false) |
6082 | && !(gsym->visibility() == elfcpp::STV_PROTECTED | |
6083 | && parameters->options().shared())) | |
6084 | || (size == 64 | |
6085 | && r_type == elfcpp::R_PPC64_ADDR64 | |
9055360d | 6086 | && target->abiversion() < 2 |
627b30b7 AM |
6087 | && (gsym->can_use_relative_reloc(false) |
6088 | || data_shndx == ppc_object->opd_shndx()))) | |
2e702c99 | 6089 | { |
b3ccdeb5 AM |
6090 | Reloc_section* rela_dyn |
6091 | = target->rela_dyn_section(symtab, layout, is_ifunc); | |
6092 | unsigned int dynrel = (is_ifunc ? elfcpp::R_POWERPC_IRELATIVE | |
6093 | : elfcpp::R_POWERPC_RELATIVE); | |
e5d5f5ed AM |
6094 | rela_dyn->add_symbolless_global_addend( |
6095 | gsym, dynrel, output_section, object, data_shndx, | |
6096 | reloc.get_r_offset(), reloc.get_r_addend()); | |
2e702c99 RM |
6097 | } |
6098 | else | |
6099 | { | |
b3ccdeb5 AM |
6100 | Reloc_section* rela_dyn |
6101 | = target->rela_dyn_section(symtab, layout, is_ifunc); | |
42cacb20 | 6102 | check_non_pic(object, r_type); |
dd93cd0a AM |
6103 | rela_dyn->add_global(gsym, r_type, output_section, |
6104 | object, data_shndx, | |
6105 | reloc.get_r_offset(), | |
6106 | reloc.get_r_addend()); | |
2e702c99 RM |
6107 | } |
6108 | } | |
42cacb20 DE |
6109 | } |
6110 | break; | |
6111 | ||
cf43a2fe | 6112 | case elfcpp::R_PPC_PLTREL24: |
42cacb20 | 6113 | case elfcpp::R_POWERPC_REL24: |
b3ccdeb5 AM |
6114 | if (!is_ifunc) |
6115 | { | |
6116 | target->push_branch(ppc_object, data_shndx, reloc.get_r_offset(), | |
6117 | r_type, | |
6118 | elfcpp::elf_r_sym<size>(reloc.get_r_info()), | |
6119 | reloc.get_r_addend()); | |
6120 | if (gsym->needs_plt_entry() | |
6121 | || (!gsym->final_value_is_known() | |
6122 | && (gsym->is_undefined() | |
6123 | || gsym->is_from_dynobj() | |
6124 | || gsym->is_preemptible()))) | |
6125 | target->make_plt_entry(symtab, layout, gsym); | |
6126 | } | |
3ea0a085 | 6127 | // Fall thru |
42cacb20 | 6128 | |
3ea0a085 | 6129 | case elfcpp::R_PPC64_REL64: |
dd93cd0a | 6130 | case elfcpp::R_POWERPC_REL32: |
3ea0a085 | 6131 | // Make a dynamic relocation if necessary. |
88b8e639 | 6132 | if (gsym->needs_dynamic_reloc(Scan::get_reference_flags(r_type, target))) |
3ea0a085 | 6133 | { |
a82bef93 ST |
6134 | if (!parameters->options().output_is_position_independent() |
6135 | && gsym->may_need_copy_reloc()) | |
3ea0a085 AM |
6136 | { |
6137 | target->copy_reloc(symtab, layout, object, | |
6138 | data_shndx, output_section, gsym, | |
6139 | reloc); | |
6140 | } | |
6141 | else | |
6142 | { | |
b3ccdeb5 AM |
6143 | Reloc_section* rela_dyn |
6144 | = target->rela_dyn_section(symtab, layout, is_ifunc); | |
3ea0a085 AM |
6145 | check_non_pic(object, r_type); |
6146 | rela_dyn->add_global(gsym, r_type, output_section, object, | |
6147 | data_shndx, reloc.get_r_offset(), | |
6148 | reloc.get_r_addend()); | |
6149 | } | |
6150 | } | |
6151 | break; | |
6152 | ||
ec661b9d AM |
6153 | case elfcpp::R_POWERPC_REL14: |
6154 | case elfcpp::R_POWERPC_REL14_BRTAKEN: | |
6155 | case elfcpp::R_POWERPC_REL14_BRNTAKEN: | |
b3ccdeb5 AM |
6156 | if (!is_ifunc) |
6157 | target->push_branch(ppc_object, data_shndx, reloc.get_r_offset(), | |
6158 | r_type, elfcpp::elf_r_sym<size>(reloc.get_r_info()), | |
6159 | reloc.get_r_addend()); | |
ec661b9d AM |
6160 | break; |
6161 | ||
6ce78956 AM |
6162 | case elfcpp::R_POWERPC_REL16: |
6163 | case elfcpp::R_POWERPC_REL16_LO: | |
6164 | case elfcpp::R_POWERPC_REL16_HI: | |
6165 | case elfcpp::R_POWERPC_REL16_HA: | |
a680de9a | 6166 | case elfcpp::R_POWERPC_REL16DX_HA: |
dd93cd0a | 6167 | case elfcpp::R_POWERPC_SECTOFF: |
dd93cd0a | 6168 | case elfcpp::R_POWERPC_SECTOFF_LO: |
dd93cd0a | 6169 | case elfcpp::R_POWERPC_SECTOFF_HI: |
dd93cd0a | 6170 | case elfcpp::R_POWERPC_SECTOFF_HA: |
f9c6b907 AM |
6171 | case elfcpp::R_PPC64_SECTOFF_DS: |
6172 | case elfcpp::R_PPC64_SECTOFF_LO_DS: | |
6173 | case elfcpp::R_POWERPC_TPREL16: | |
6174 | case elfcpp::R_POWERPC_TPREL16_LO: | |
6175 | case elfcpp::R_POWERPC_TPREL16_HI: | |
dd93cd0a | 6176 | case elfcpp::R_POWERPC_TPREL16_HA: |
f9c6b907 AM |
6177 | case elfcpp::R_PPC64_TPREL16_DS: |
6178 | case elfcpp::R_PPC64_TPREL16_LO_DS: | |
6179 | case elfcpp::R_PPC64_TPREL16_HIGH: | |
6180 | case elfcpp::R_PPC64_TPREL16_HIGHA: | |
dd93cd0a | 6181 | case elfcpp::R_PPC64_TPREL16_HIGHER: |
dd93cd0a | 6182 | case elfcpp::R_PPC64_TPREL16_HIGHERA: |
dd93cd0a | 6183 | case elfcpp::R_PPC64_TPREL16_HIGHEST: |
dd93cd0a | 6184 | case elfcpp::R_PPC64_TPREL16_HIGHESTA: |
f9c6b907 AM |
6185 | case elfcpp::R_POWERPC_DTPREL16: |
6186 | case elfcpp::R_POWERPC_DTPREL16_LO: | |
6187 | case elfcpp::R_POWERPC_DTPREL16_HI: | |
6188 | case elfcpp::R_POWERPC_DTPREL16_HA: | |
dd93cd0a AM |
6189 | case elfcpp::R_PPC64_DTPREL16_DS: |
6190 | case elfcpp::R_PPC64_DTPREL16_LO_DS: | |
f9c6b907 AM |
6191 | case elfcpp::R_PPC64_DTPREL16_HIGH: |
6192 | case elfcpp::R_PPC64_DTPREL16_HIGHA: | |
6193 | case elfcpp::R_PPC64_DTPREL16_HIGHER: | |
6194 | case elfcpp::R_PPC64_DTPREL16_HIGHERA: | |
6195 | case elfcpp::R_PPC64_DTPREL16_HIGHEST: | |
6196 | case elfcpp::R_PPC64_DTPREL16_HIGHESTA: | |
dd93cd0a AM |
6197 | case elfcpp::R_PPC64_TLSGD: |
6198 | case elfcpp::R_PPC64_TLSLD: | |
45965137 | 6199 | case elfcpp::R_PPC64_ADDR64_LOCAL: |
cf43a2fe AM |
6200 | break; |
6201 | ||
42cacb20 DE |
6202 | case elfcpp::R_POWERPC_GOT16: |
6203 | case elfcpp::R_POWERPC_GOT16_LO: | |
6204 | case elfcpp::R_POWERPC_GOT16_HI: | |
6205 | case elfcpp::R_POWERPC_GOT16_HA: | |
dd93cd0a AM |
6206 | case elfcpp::R_PPC64_GOT16_DS: |
6207 | case elfcpp::R_PPC64_GOT16_LO_DS: | |
42cacb20 | 6208 | { |
c9269dff AM |
6209 | // The symbol requires a GOT entry. |
6210 | Output_data_got_powerpc<size, big_endian>* got; | |
42cacb20 DE |
6211 | |
6212 | got = target->got_section(symtab, layout); | |
2e702c99 | 6213 | if (gsym->final_value_is_known()) |
2e702c99 | 6214 | { |
b01a4b04 AM |
6215 | if (is_ifunc |
6216 | && (size == 32 || target->abiversion() >= 2)) | |
e5d5f5ed AM |
6217 | got->add_global_plt(gsym, GOT_TYPE_STANDARD); |
6218 | else | |
6219 | got->add_global(gsym, GOT_TYPE_STANDARD); | |
6220 | } | |
6221 | else if (!gsym->has_got_offset(GOT_TYPE_STANDARD)) | |
6222 | { | |
6223 | // If we are generating a shared object or a pie, this | |
6224 | // symbol's GOT entry will be set by a dynamic relocation. | |
6225 | unsigned int off = got->add_constant(0); | |
6226 | gsym->set_got_offset(GOT_TYPE_STANDARD, off); | |
6227 | ||
b3ccdeb5 AM |
6228 | Reloc_section* rela_dyn |
6229 | = target->rela_dyn_section(symtab, layout, is_ifunc); | |
6230 | ||
e5d5f5ed | 6231 | if (gsym->can_use_relative_reloc(false) |
9055360d AM |
6232 | && !((size == 32 |
6233 | || target->abiversion() >= 2) | |
e5d5f5ed AM |
6234 | && gsym->visibility() == elfcpp::STV_PROTECTED |
6235 | && parameters->options().shared())) | |
2e702c99 | 6236 | { |
b3ccdeb5 AM |
6237 | unsigned int dynrel = (is_ifunc ? elfcpp::R_POWERPC_IRELATIVE |
6238 | : elfcpp::R_POWERPC_RELATIVE); | |
e5d5f5ed AM |
6239 | rela_dyn->add_global_relative(gsym, dynrel, got, off, 0, false); |
6240 | } | |
6241 | else | |
6242 | { | |
6243 | unsigned int dynrel = elfcpp::R_POWERPC_GLOB_DAT; | |
6244 | rela_dyn->add_global(gsym, dynrel, got, off, 0); | |
42cacb20 | 6245 | } |
2e702c99 | 6246 | } |
42cacb20 DE |
6247 | } |
6248 | break; | |
6249 | ||
cf43a2fe AM |
6250 | case elfcpp::R_PPC64_TOC16: |
6251 | case elfcpp::R_PPC64_TOC16_LO: | |
6252 | case elfcpp::R_PPC64_TOC16_HI: | |
6253 | case elfcpp::R_PPC64_TOC16_HA: | |
6254 | case elfcpp::R_PPC64_TOC16_DS: | |
6255 | case elfcpp::R_PPC64_TOC16_LO_DS: | |
42cacb20 DE |
6256 | // We need a GOT section. |
6257 | target->got_section(symtab, layout); | |
6258 | break; | |
6259 | ||
dd93cd0a AM |
6260 | case elfcpp::R_POWERPC_GOT_TLSGD16: |
6261 | case elfcpp::R_POWERPC_GOT_TLSGD16_LO: | |
6262 | case elfcpp::R_POWERPC_GOT_TLSGD16_HI: | |
6263 | case elfcpp::R_POWERPC_GOT_TLSGD16_HA: | |
6264 | { | |
6265 | const bool final = gsym->final_value_is_known(); | |
6266 | const tls::Tls_optimization tls_type = target->optimize_tls_gd(final); | |
6267 | if (tls_type == tls::TLSOPT_NONE) | |
6268 | { | |
6269 | Output_data_got_powerpc<size, big_endian>* got | |
6270 | = target->got_section(symtab, layout); | |
b3ccdeb5 AM |
6271 | Reloc_section* rela_dyn = target->rela_dyn_section(layout); |
6272 | got->add_global_pair_with_rel(gsym, GOT_TYPE_TLSGD, rela_dyn, | |
dd93cd0a AM |
6273 | elfcpp::R_POWERPC_DTPMOD, |
6274 | elfcpp::R_POWERPC_DTPREL); | |
6275 | } | |
6276 | else if (tls_type == tls::TLSOPT_TO_IE) | |
6277 | { | |
acc276d8 AM |
6278 | if (!gsym->has_got_offset(GOT_TYPE_TPREL)) |
6279 | { | |
6280 | Output_data_got_powerpc<size, big_endian>* got | |
6281 | = target->got_section(symtab, layout); | |
6282 | Reloc_section* rela_dyn = target->rela_dyn_section(layout); | |
6283 | if (gsym->is_undefined() | |
6284 | || gsym->is_from_dynobj()) | |
6285 | { | |
6286 | got->add_global_with_rel(gsym, GOT_TYPE_TPREL, rela_dyn, | |
6287 | elfcpp::R_POWERPC_TPREL); | |
6288 | } | |
6289 | else | |
6290 | { | |
6291 | unsigned int off = got->add_constant(0); | |
6292 | gsym->set_got_offset(GOT_TYPE_TPREL, off); | |
6293 | unsigned int dynrel = elfcpp::R_POWERPC_TPREL; | |
6294 | rela_dyn->add_symbolless_global_addend(gsym, dynrel, | |
6295 | got, off, 0); | |
6296 | } | |
6297 | } | |
dd93cd0a AM |
6298 | } |
6299 | else if (tls_type == tls::TLSOPT_TO_LE) | |
6300 | { | |
6301 | // no GOT relocs needed for Local Exec. | |
6302 | } | |
6303 | else | |
6304 | gold_unreachable(); | |
6305 | } | |
42cacb20 DE |
6306 | break; |
6307 | ||
dd93cd0a AM |
6308 | case elfcpp::R_POWERPC_GOT_TLSLD16: |
6309 | case elfcpp::R_POWERPC_GOT_TLSLD16_LO: | |
6310 | case elfcpp::R_POWERPC_GOT_TLSLD16_HI: | |
6311 | case elfcpp::R_POWERPC_GOT_TLSLD16_HA: | |
6312 | { | |
6313 | const tls::Tls_optimization tls_type = target->optimize_tls_ld(); | |
6314 | if (tls_type == tls::TLSOPT_NONE) | |
6315 | target->tlsld_got_offset(symtab, layout, object); | |
6316 | else if (tls_type == tls::TLSOPT_TO_LE) | |
6317 | { | |
6318 | // no GOT relocs needed for Local Exec. | |
7404fe1b AM |
6319 | if (parameters->options().emit_relocs()) |
6320 | { | |
6321 | Output_section* os = layout->tls_segment()->first_section(); | |
6322 | gold_assert(os != NULL); | |
6323 | os->set_needs_symtab_index(); | |
6324 | } | |
dd93cd0a AM |
6325 | } |
6326 | else | |
6327 | gold_unreachable(); | |
6328 | } | |
6329 | break; | |
6330 | ||
6331 | case elfcpp::R_POWERPC_GOT_DTPREL16: | |
6332 | case elfcpp::R_POWERPC_GOT_DTPREL16_LO: | |
6333 | case elfcpp::R_POWERPC_GOT_DTPREL16_HI: | |
6334 | case elfcpp::R_POWERPC_GOT_DTPREL16_HA: | |
6335 | { | |
6336 | Output_data_got_powerpc<size, big_endian>* got | |
6337 | = target->got_section(symtab, layout); | |
bd73a62d AM |
6338 | if (!gsym->final_value_is_known() |
6339 | && (gsym->is_from_dynobj() | |
6340 | || gsym->is_undefined() | |
6341 | || gsym->is_preemptible())) | |
6342 | got->add_global_with_rel(gsym, GOT_TYPE_DTPREL, | |
6343 | target->rela_dyn_section(layout), | |
6344 | elfcpp::R_POWERPC_DTPREL); | |
6345 | else | |
6346 | got->add_global_tls(gsym, GOT_TYPE_DTPREL); | |
dd93cd0a AM |
6347 | } |
6348 | break; | |
6349 | ||
6350 | case elfcpp::R_POWERPC_GOT_TPREL16: | |
6351 | case elfcpp::R_POWERPC_GOT_TPREL16_LO: | |
6352 | case elfcpp::R_POWERPC_GOT_TPREL16_HI: | |
6353 | case elfcpp::R_POWERPC_GOT_TPREL16_HA: | |
6354 | { | |
6355 | const bool final = gsym->final_value_is_known(); | |
6356 | const tls::Tls_optimization tls_type = target->optimize_tls_ie(final); | |
6357 | if (tls_type == tls::TLSOPT_NONE) | |
6358 | { | |
acc276d8 AM |
6359 | if (!gsym->has_got_offset(GOT_TYPE_TPREL)) |
6360 | { | |
6361 | Output_data_got_powerpc<size, big_endian>* got | |
6362 | = target->got_section(symtab, layout); | |
6363 | Reloc_section* rela_dyn = target->rela_dyn_section(layout); | |
6364 | if (gsym->is_undefined() | |
6365 | || gsym->is_from_dynobj()) | |
6366 | { | |
6367 | got->add_global_with_rel(gsym, GOT_TYPE_TPREL, rela_dyn, | |
6368 | elfcpp::R_POWERPC_TPREL); | |
6369 | } | |
6370 | else | |
6371 | { | |
6372 | unsigned int off = got->add_constant(0); | |
6373 | gsym->set_got_offset(GOT_TYPE_TPREL, off); | |
6374 | unsigned int dynrel = elfcpp::R_POWERPC_TPREL; | |
6375 | rela_dyn->add_symbolless_global_addend(gsym, dynrel, | |
6376 | got, off, 0); | |
6377 | } | |
6378 | } | |
dd93cd0a AM |
6379 | } |
6380 | else if (tls_type == tls::TLSOPT_TO_LE) | |
6381 | { | |
6382 | // no GOT relocs needed for Local Exec. | |
6383 | } | |
6384 | else | |
6385 | gold_unreachable(); | |
6386 | } | |
42cacb20 DE |
6387 | break; |
6388 | ||
6389 | default: | |
6390 | unsupported_reloc_global(object, r_type, gsym); | |
6391 | break; | |
6392 | } | |
d8f5a274 AM |
6393 | |
6394 | switch (r_type) | |
6395 | { | |
6396 | case elfcpp::R_POWERPC_GOT_TLSLD16: | |
6397 | case elfcpp::R_POWERPC_GOT_TLSGD16: | |
6398 | case elfcpp::R_POWERPC_GOT_TPREL16: | |
6399 | case elfcpp::R_POWERPC_GOT_DTPREL16: | |
6400 | case elfcpp::R_POWERPC_GOT16: | |
6401 | case elfcpp::R_PPC64_GOT16_DS: | |
6402 | case elfcpp::R_PPC64_TOC16: | |
6403 | case elfcpp::R_PPC64_TOC16_DS: | |
6404 | ppc_object->set_has_small_toc_reloc(); | |
6405 | default: | |
6406 | break; | |
6407 | } | |
42cacb20 DE |
6408 | } |
6409 | ||
6d03d481 ST |
6410 | // Process relocations for gc. |
6411 | ||
6412 | template<int size, bool big_endian> | |
6413 | void | |
6414 | Target_powerpc<size, big_endian>::gc_process_relocs( | |
d83ce4e3 AM |
6415 | Symbol_table* symtab, |
6416 | Layout* layout, | |
6417 | Sized_relobj_file<size, big_endian>* object, | |
6418 | unsigned int data_shndx, | |
6419 | unsigned int, | |
6420 | const unsigned char* prelocs, | |
6421 | size_t reloc_count, | |
6422 | Output_section* output_section, | |
6423 | bool needs_special_offset_handling, | |
6424 | size_t local_symbol_count, | |
6425 | const unsigned char* plocal_symbols) | |
6d03d481 ST |
6426 | { |
6427 | typedef Target_powerpc<size, big_endian> Powerpc; | |
2ea97941 | 6428 | typedef typename Target_powerpc<size, big_endian>::Scan Scan; |
e81fea4d AM |
6429 | Powerpc_relobj<size, big_endian>* ppc_object |
6430 | = static_cast<Powerpc_relobj<size, big_endian>*>(object); | |
6431 | if (size == 64) | |
6432 | ppc_object->set_opd_valid(); | |
6433 | if (size == 64 && data_shndx == ppc_object->opd_shndx()) | |
6434 | { | |
6435 | typename Powerpc_relobj<size, big_endian>::Access_from::iterator p; | |
6436 | for (p = ppc_object->access_from_map()->begin(); | |
6437 | p != ppc_object->access_from_map()->end(); | |
6438 | ++p) | |
6439 | { | |
6440 | Address dst_off = p->first; | |
6441 | unsigned int dst_indx = ppc_object->get_opd_ent(dst_off); | |
6442 | typename Powerpc_relobj<size, big_endian>::Section_refs::iterator s; | |
6443 | for (s = p->second.begin(); s != p->second.end(); ++s) | |
6444 | { | |
efc6fa12 | 6445 | Relobj* src_obj = s->first; |
e81fea4d AM |
6446 | unsigned int src_indx = s->second; |
6447 | symtab->gc()->add_reference(src_obj, src_indx, | |
6448 | ppc_object, dst_indx); | |
6449 | } | |
6450 | p->second.clear(); | |
6451 | } | |
6452 | ppc_object->access_from_map()->clear(); | |
c6de8ed4 | 6453 | ppc_object->process_gc_mark(symtab); |
e81fea4d AM |
6454 | // Don't look at .opd relocs as .opd will reference everything. |
6455 | return; | |
6456 | } | |
6d03d481 | 6457 | |
41cbeecc | 6458 | gold::gc_process_relocs<size, big_endian, Powerpc, elfcpp::SHT_RELA, Scan, |
3ff2ccb0 | 6459 | typename Target_powerpc::Relocatable_size_for_reloc>( |
6d03d481 ST |
6460 | symtab, |
6461 | layout, | |
6462 | this, | |
6463 | object, | |
6464 | data_shndx, | |
6465 | prelocs, | |
6466 | reloc_count, | |
6467 | output_section, | |
6468 | needs_special_offset_handling, | |
6469 | local_symbol_count, | |
6470 | plocal_symbols); | |
6471 | } | |
6472 | ||
e81fea4d AM |
6473 | // Handle target specific gc actions when adding a gc reference from |
6474 | // SRC_OBJ, SRC_SHNDX to a location specified by DST_OBJ, DST_SHNDX | |
6475 | // and DST_OFF. For powerpc64, this adds a referenc to the code | |
6476 | // section of a function descriptor. | |
6477 | ||
6478 | template<int size, bool big_endian> | |
6479 | void | |
6480 | Target_powerpc<size, big_endian>::do_gc_add_reference( | |
6481 | Symbol_table* symtab, | |
efc6fa12 | 6482 | Relobj* src_obj, |
e81fea4d | 6483 | unsigned int src_shndx, |
efc6fa12 | 6484 | Relobj* dst_obj, |
e81fea4d AM |
6485 | unsigned int dst_shndx, |
6486 | Address dst_off) const | |
6487 | { | |
6c77229c AM |
6488 | if (size != 64 || dst_obj->is_dynamic()) |
6489 | return; | |
6490 | ||
e81fea4d AM |
6491 | Powerpc_relobj<size, big_endian>* ppc_object |
6492 | = static_cast<Powerpc_relobj<size, big_endian>*>(dst_obj); | |
a2d7bf59 | 6493 | if (dst_shndx != 0 && dst_shndx == ppc_object->opd_shndx()) |
e81fea4d AM |
6494 | { |
6495 | if (ppc_object->opd_valid()) | |
6496 | { | |
6497 | dst_shndx = ppc_object->get_opd_ent(dst_off); | |
6498 | symtab->gc()->add_reference(src_obj, src_shndx, dst_obj, dst_shndx); | |
6499 | } | |
6500 | else | |
6501 | { | |
6502 | // If we haven't run scan_opd_relocs, we must delay | |
6503 | // processing this function descriptor reference. | |
6504 | ppc_object->add_reference(src_obj, src_shndx, dst_off); | |
6505 | } | |
6506 | } | |
6507 | } | |
6508 | ||
6509 | // Add any special sections for this symbol to the gc work list. | |
6510 | // For powerpc64, this adds the code section of a function | |
6511 | // descriptor. | |
6512 | ||
6513 | template<int size, bool big_endian> | |
6514 | void | |
6515 | Target_powerpc<size, big_endian>::do_gc_mark_symbol( | |
6516 | Symbol_table* symtab, | |
6517 | Symbol* sym) const | |
6518 | { | |
6519 | if (size == 64) | |
6520 | { | |
6521 | Powerpc_relobj<size, big_endian>* ppc_object | |
6522 | = static_cast<Powerpc_relobj<size, big_endian>*>(sym->object()); | |
6523 | bool is_ordinary; | |
6524 | unsigned int shndx = sym->shndx(&is_ordinary); | |
a2d7bf59 | 6525 | if (is_ordinary && shndx != 0 && shndx == ppc_object->opd_shndx()) |
e81fea4d AM |
6526 | { |
6527 | Sized_symbol<size>* gsym = symtab->get_sized_symbol<size>(sym); | |
6528 | Address dst_off = gsym->value(); | |
c6de8ed4 AM |
6529 | if (ppc_object->opd_valid()) |
6530 | { | |
6531 | unsigned int dst_indx = ppc_object->get_opd_ent(dst_off); | |
4277535c RÁE |
6532 | symtab->gc()->worklist().push_back(Section_id(ppc_object, |
6533 | dst_indx)); | |
c6de8ed4 AM |
6534 | } |
6535 | else | |
6536 | ppc_object->add_gc_mark(dst_off); | |
e81fea4d AM |
6537 | } |
6538 | } | |
6539 | } | |
6540 | ||
dc3714f3 AM |
6541 | // For a symbol location in .opd, set LOC to the location of the |
6542 | // function entry. | |
6543 | ||
6544 | template<int size, bool big_endian> | |
6545 | void | |
6546 | Target_powerpc<size, big_endian>::do_function_location( | |
6547 | Symbol_location* loc) const | |
6548 | { | |
a2d7bf59 | 6549 | if (size == 64 && loc->shndx != 0) |
dc3714f3 AM |
6550 | { |
6551 | if (loc->object->is_dynamic()) | |
6552 | { | |
6553 | Powerpc_dynobj<size, big_endian>* ppc_object | |
6554 | = static_cast<Powerpc_dynobj<size, big_endian>*>(loc->object); | |
6555 | if (loc->shndx == ppc_object->opd_shndx()) | |
6556 | { | |
6557 | Address dest_off; | |
6558 | Address off = loc->offset - ppc_object->opd_address(); | |
6559 | loc->shndx = ppc_object->get_opd_ent(off, &dest_off); | |
6560 | loc->offset = dest_off; | |
6561 | } | |
6562 | } | |
6563 | else | |
6564 | { | |
6565 | const Powerpc_relobj<size, big_endian>* ppc_object | |
6566 | = static_cast<const Powerpc_relobj<size, big_endian>*>(loc->object); | |
6567 | if (loc->shndx == ppc_object->opd_shndx()) | |
6568 | { | |
6569 | Address dest_off; | |
6570 | loc->shndx = ppc_object->get_opd_ent(loc->offset, &dest_off); | |
6571 | loc->offset = dest_off; | |
6572 | } | |
6573 | } | |
6574 | } | |
6575 | } | |
6576 | ||
bbec1a5d AM |
6577 | // FNOFFSET in section SHNDX in OBJECT is the start of a function |
6578 | // compiled with -fsplit-stack. The function calls non-split-stack | |
6579 | // code. Change the function to ensure it has enough stack space to | |
6580 | // call some random function. | |
6581 | ||
6582 | template<int size, bool big_endian> | |
6583 | void | |
6584 | Target_powerpc<size, big_endian>::do_calls_non_split( | |
6585 | Relobj* object, | |
6586 | unsigned int shndx, | |
6587 | section_offset_type fnoffset, | |
6588 | section_size_type fnsize, | |
6589 | unsigned char* view, | |
6590 | section_size_type view_size, | |
6591 | std::string* from, | |
6592 | std::string* to) const | |
6593 | { | |
6594 | // 32-bit not supported. | |
6595 | if (size == 32) | |
6596 | { | |
6597 | // warn | |
6598 | Target::do_calls_non_split(object, shndx, fnoffset, fnsize, | |
6599 | view, view_size, from, to); | |
6600 | return; | |
6601 | } | |
6602 | ||
6603 | // The function always starts with | |
6604 | // ld %r0,-0x7000-64(%r13) # tcbhead_t.__private_ss | |
6605 | // addis %r12,%r1,-allocate@ha | |
6606 | // addi %r12,%r12,-allocate@l | |
6607 | // cmpld %r12,%r0 | |
6608 | // but note that the addis or addi may be replaced with a nop | |
6609 | ||
6610 | unsigned char *entry = view + fnoffset; | |
6611 | uint32_t insn = elfcpp::Swap<32, big_endian>::readval(entry); | |
6612 | ||
6613 | if ((insn & 0xffff0000) == addis_2_12) | |
6614 | { | |
6615 | /* Skip ELFv2 global entry code. */ | |
6616 | entry += 8; | |
6617 | insn = elfcpp::Swap<32, big_endian>::readval(entry); | |
6618 | } | |
6619 | ||
6620 | unsigned char *pinsn = entry; | |
6621 | bool ok = false; | |
6622 | const uint32_t ld_private_ss = 0xe80d8fc0; | |
6623 | if (insn == ld_private_ss) | |
6624 | { | |
6625 | int32_t allocate = 0; | |
6626 | while (1) | |
6627 | { | |
6628 | pinsn += 4; | |
6629 | insn = elfcpp::Swap<32, big_endian>::readval(pinsn); | |
6630 | if ((insn & 0xffff0000) == addis_12_1) | |
6631 | allocate += (insn & 0xffff) << 16; | |
6632 | else if ((insn & 0xffff0000) == addi_12_1 | |
6633 | || (insn & 0xffff0000) == addi_12_12) | |
6634 | allocate += ((insn & 0xffff) ^ 0x8000) - 0x8000; | |
6635 | else if (insn != nop) | |
6636 | break; | |
6637 | } | |
6638 | if (insn == cmpld_7_12_0 && pinsn == entry + 12) | |
6639 | { | |
6640 | int extra = parameters->options().split_stack_adjust_size(); | |
6641 | allocate -= extra; | |
6642 | if (allocate >= 0 || extra < 0) | |
6643 | { | |
6644 | object->error(_("split-stack stack size overflow at " | |
6645 | "section %u offset %0zx"), | |
6646 | shndx, static_cast<size_t>(fnoffset)); | |
6647 | return; | |
6648 | } | |
6649 | pinsn = entry + 4; | |
6650 | insn = addis_12_1 | (((allocate + 0x8000) >> 16) & 0xffff); | |
6651 | if (insn != addis_12_1) | |
6652 | { | |
6653 | elfcpp::Swap<32, big_endian>::writeval(pinsn, insn); | |
6654 | pinsn += 4; | |
6655 | insn = addi_12_12 | (allocate & 0xffff); | |
6656 | if (insn != addi_12_12) | |
6657 | { | |
6658 | elfcpp::Swap<32, big_endian>::writeval(pinsn, insn); | |
6659 | pinsn += 4; | |
6660 | } | |
6661 | } | |
6662 | else | |
6663 | { | |
6664 | insn = addi_12_1 | (allocate & 0xffff); | |
6665 | elfcpp::Swap<32, big_endian>::writeval(pinsn, insn); | |
6666 | pinsn += 4; | |
6667 | } | |
6668 | if (pinsn != entry + 12) | |
6669 | elfcpp::Swap<32, big_endian>::writeval(pinsn, nop); | |
6670 | ||
6671 | ok = true; | |
6672 | } | |
6673 | } | |
6674 | ||
6675 | if (!ok) | |
6676 | { | |
6677 | if (!object->has_no_split_stack()) | |
6678 | object->error(_("failed to match split-stack sequence at " | |
6679 | "section %u offset %0zx"), | |
6680 | shndx, static_cast<size_t>(fnoffset)); | |
6681 | } | |
6682 | } | |
6683 | ||
42cacb20 DE |
6684 | // Scan relocations for a section. |
6685 | ||
6686 | template<int size, bool big_endian> | |
6687 | void | |
6688 | Target_powerpc<size, big_endian>::scan_relocs( | |
d83ce4e3 AM |
6689 | Symbol_table* symtab, |
6690 | Layout* layout, | |
6691 | Sized_relobj_file<size, big_endian>* object, | |
6692 | unsigned int data_shndx, | |
6693 | unsigned int sh_type, | |
6694 | const unsigned char* prelocs, | |
6695 | size_t reloc_count, | |
6696 | Output_section* output_section, | |
6697 | bool needs_special_offset_handling, | |
6698 | size_t local_symbol_count, | |
6699 | const unsigned char* plocal_symbols) | |
42cacb20 DE |
6700 | { |
6701 | typedef Target_powerpc<size, big_endian> Powerpc; | |
2ea97941 | 6702 | typedef typename Target_powerpc<size, big_endian>::Scan Scan; |
42cacb20 DE |
6703 | |
6704 | if (sh_type == elfcpp::SHT_REL) | |
6705 | { | |
6706 | gold_error(_("%s: unsupported REL reloc section"), | |
6707 | object->name().c_str()); | |
6708 | return; | |
6709 | } | |
6710 | ||
2ea97941 | 6711 | gold::scan_relocs<size, big_endian, Powerpc, elfcpp::SHT_RELA, Scan>( |
42cacb20 DE |
6712 | symtab, |
6713 | layout, | |
6714 | this, | |
6715 | object, | |
6716 | data_shndx, | |
6717 | prelocs, | |
6718 | reloc_count, | |
6719 | output_section, | |
6720 | needs_special_offset_handling, | |
6721 | local_symbol_count, | |
6722 | plocal_symbols); | |
6723 | } | |
6724 | ||
ec4dbad3 AM |
6725 | // Functor class for processing the global symbol table. |
6726 | // Removes symbols defined on discarded opd entries. | |
6727 | ||
6728 | template<bool big_endian> | |
6729 | class Global_symbol_visitor_opd | |
6730 | { | |
6731 | public: | |
6732 | Global_symbol_visitor_opd() | |
6733 | { } | |
6734 | ||
6735 | void | |
6736 | operator()(Sized_symbol<64>* sym) | |
6737 | { | |
6738 | if (sym->has_symtab_index() | |
6739 | || sym->source() != Symbol::FROM_OBJECT | |
6740 | || !sym->in_real_elf()) | |
6741 | return; | |
6742 | ||
6c77229c AM |
6743 | if (sym->object()->is_dynamic()) |
6744 | return; | |
6745 | ||
ec4dbad3 AM |
6746 | Powerpc_relobj<64, big_endian>* symobj |
6747 | = static_cast<Powerpc_relobj<64, big_endian>*>(sym->object()); | |
6c77229c | 6748 | if (symobj->opd_shndx() == 0) |
ec4dbad3 AM |
6749 | return; |
6750 | ||
6751 | bool is_ordinary; | |
6752 | unsigned int shndx = sym->shndx(&is_ordinary); | |
6753 | if (shndx == symobj->opd_shndx() | |
6754 | && symobj->get_opd_discard(sym->value())) | |
1611bc4a AM |
6755 | { |
6756 | sym->set_undefined(); | |
e3ee8ed4 | 6757 | sym->set_visibility(elfcpp::STV_DEFAULT); |
1611bc4a AM |
6758 | sym->set_is_defined_in_discarded_section(); |
6759 | sym->set_symtab_index(-1U); | |
6760 | } | |
ec4dbad3 AM |
6761 | } |
6762 | }; | |
6763 | ||
f3a0ed29 AM |
6764 | template<int size, bool big_endian> |
6765 | void | |
6766 | Target_powerpc<size, big_endian>::define_save_restore_funcs( | |
6767 | Layout* layout, | |
6768 | Symbol_table* symtab) | |
6769 | { | |
6770 | if (size == 64) | |
6771 | { | |
d49044c7 AM |
6772 | Output_data_save_res<size, big_endian>* savres |
6773 | = new Output_data_save_res<size, big_endian>(symtab); | |
6774 | this->savres_section_ = savres; | |
f3a0ed29 AM |
6775 | layout->add_output_section_data(".text", elfcpp::SHT_PROGBITS, |
6776 | elfcpp::SHF_ALLOC | elfcpp::SHF_EXECINSTR, | |
6777 | savres, ORDER_TEXT, false); | |
6778 | } | |
6779 | } | |
6780 | ||
d8f5a274 AM |
6781 | // Sort linker created .got section first (for the header), then input |
6782 | // sections belonging to files using small model code. | |
6783 | ||
6784 | template<bool big_endian> | |
6785 | class Sort_toc_sections | |
6786 | { | |
6787 | public: | |
6788 | bool | |
6789 | operator()(const Output_section::Input_section& is1, | |
6790 | const Output_section::Input_section& is2) const | |
6791 | { | |
6792 | if (!is1.is_input_section() && is2.is_input_section()) | |
6793 | return true; | |
6794 | bool small1 | |
6795 | = (is1.is_input_section() | |
6796 | && (static_cast<const Powerpc_relobj<64, big_endian>*>(is1.relobj()) | |
6797 | ->has_small_toc_reloc())); | |
6798 | bool small2 | |
6799 | = (is2.is_input_section() | |
6800 | && (static_cast<const Powerpc_relobj<64, big_endian>*>(is2.relobj()) | |
6801 | ->has_small_toc_reloc())); | |
6802 | return small1 && !small2; | |
6803 | } | |
6804 | }; | |
6805 | ||
42cacb20 DE |
6806 | // Finalize the sections. |
6807 | ||
6808 | template<int size, bool big_endian> | |
6809 | void | |
d5b40221 DK |
6810 | Target_powerpc<size, big_endian>::do_finalize_sections( |
6811 | Layout* layout, | |
f59f41f3 | 6812 | const Input_objects*, |
ec4dbad3 | 6813 | Symbol_table* symtab) |
42cacb20 | 6814 | { |
c9824451 AM |
6815 | if (parameters->doing_static_link()) |
6816 | { | |
6817 | // At least some versions of glibc elf-init.o have a strong | |
6818 | // reference to __rela_iplt marker syms. A weak ref would be | |
6819 | // better.. | |
6820 | if (this->iplt_ != NULL) | |
6821 | { | |
6822 | Reloc_section* rel = this->iplt_->rel_plt(); | |
6823 | symtab->define_in_output_data("__rela_iplt_start", NULL, | |
6824 | Symbol_table::PREDEFINED, rel, 0, 0, | |
6825 | elfcpp::STT_NOTYPE, elfcpp::STB_GLOBAL, | |
6826 | elfcpp::STV_HIDDEN, 0, false, true); | |
6827 | symtab->define_in_output_data("__rela_iplt_end", NULL, | |
6828 | Symbol_table::PREDEFINED, rel, 0, 0, | |
6829 | elfcpp::STT_NOTYPE, elfcpp::STB_GLOBAL, | |
6830 | elfcpp::STV_HIDDEN, 0, true, true); | |
6831 | } | |
6832 | else | |
6833 | { | |
6834 | symtab->define_as_constant("__rela_iplt_start", NULL, | |
6835 | Symbol_table::PREDEFINED, 0, 0, | |
6836 | elfcpp::STT_NOTYPE, elfcpp::STB_GLOBAL, | |
6837 | elfcpp::STV_HIDDEN, 0, true, false); | |
6838 | symtab->define_as_constant("__rela_iplt_end", NULL, | |
6839 | Symbol_table::PREDEFINED, 0, 0, | |
6840 | elfcpp::STT_NOTYPE, elfcpp::STB_GLOBAL, | |
6841 | elfcpp::STV_HIDDEN, 0, true, false); | |
6842 | } | |
6843 | } | |
6844 | ||
ec4dbad3 AM |
6845 | if (size == 64) |
6846 | { | |
6847 | typedef Global_symbol_visitor_opd<big_endian> Symbol_visitor; | |
6848 | symtab->for_all_symbols<64, Symbol_visitor>(Symbol_visitor()); | |
ec661b9d AM |
6849 | |
6850 | if (!parameters->options().relocatable()) | |
6851 | { | |
6852 | this->define_save_restore_funcs(layout, symtab); | |
6853 | ||
6854 | // Annoyingly, we need to make these sections now whether or | |
6855 | // not we need them. If we delay until do_relax then we | |
6856 | // need to mess with the relaxation machinery checkpointing. | |
6857 | this->got_section(symtab, layout); | |
6858 | this->make_brlt_section(layout); | |
d8f5a274 AM |
6859 | |
6860 | if (parameters->options().toc_sort()) | |
6861 | { | |
6862 | Output_section* os = this->got_->output_section(); | |
6863 | if (os != NULL && os->input_sections().size() > 1) | |
6864 | std::stable_sort(os->input_sections().begin(), | |
6865 | os->input_sections().end(), | |
6866 | Sort_toc_sections<big_endian>()); | |
6867 | } | |
ec661b9d | 6868 | } |
ec4dbad3 AM |
6869 | } |
6870 | ||
42cacb20 | 6871 | // Fill in some more dynamic tags. |
c9269dff | 6872 | Output_data_dynamic* odyn = layout->dynamic_data(); |
c9824451 | 6873 | if (odyn != NULL) |
cf43a2fe | 6874 | { |
c9824451 AM |
6875 | const Reloc_section* rel_plt = (this->plt_ == NULL |
6876 | ? NULL | |
6877 | : this->plt_->rel_plt()); | |
6878 | layout->add_target_dynamic_tags(false, this->plt_, rel_plt, | |
6879 | this->rela_dyn_, true, size == 32); | |
6880 | ||
6881 | if (size == 32) | |
dd93cd0a | 6882 | { |
c9824451 AM |
6883 | if (this->got_ != NULL) |
6884 | { | |
6885 | this->got_->finalize_data_size(); | |
6886 | odyn->add_section_plus_offset(elfcpp::DT_PPC_GOT, | |
6887 | this->got_, this->got_->g_o_t()); | |
6888 | } | |
dd93cd0a | 6889 | } |
c9824451 | 6890 | else |
dd93cd0a | 6891 | { |
c9824451 AM |
6892 | if (this->glink_ != NULL) |
6893 | { | |
6894 | this->glink_->finalize_data_size(); | |
6895 | odyn->add_section_plus_offset(elfcpp::DT_PPC64_GLINK, | |
6896 | this->glink_, | |
ec661b9d | 6897 | (this->glink_->pltresolve_size |
c9824451 AM |
6898 | - 32)); |
6899 | } | |
dd93cd0a | 6900 | } |
c9269dff | 6901 | } |
cf43a2fe | 6902 | |
42cacb20 DE |
6903 | // Emit any relocs we saved in an attempt to avoid generating COPY |
6904 | // relocs. | |
6905 | if (this->copy_relocs_.any_saved_relocs()) | |
6906 | this->copy_relocs_.emit(this->rela_dyn_section(layout)); | |
6907 | } | |
6908 | ||
aba6bc71 AM |
6909 | // Return TRUE iff INSN is one we expect on a _LO variety toc/got |
6910 | // reloc. | |
6911 | ||
6912 | static bool | |
6913 | ok_lo_toc_insn(uint32_t insn) | |
6914 | { | |
6915 | return ((insn & (0x3f << 26)) == 14u << 26 /* addi */ | |
6916 | || (insn & (0x3f << 26)) == 32u << 26 /* lwz */ | |
6917 | || (insn & (0x3f << 26)) == 34u << 26 /* lbz */ | |
6918 | || (insn & (0x3f << 26)) == 36u << 26 /* stw */ | |
6919 | || (insn & (0x3f << 26)) == 38u << 26 /* stb */ | |
6920 | || (insn & (0x3f << 26)) == 40u << 26 /* lhz */ | |
6921 | || (insn & (0x3f << 26)) == 42u << 26 /* lha */ | |
6922 | || (insn & (0x3f << 26)) == 44u << 26 /* sth */ | |
6923 | || (insn & (0x3f << 26)) == 46u << 26 /* lmw */ | |
6924 | || (insn & (0x3f << 26)) == 47u << 26 /* stmw */ | |
6925 | || (insn & (0x3f << 26)) == 48u << 26 /* lfs */ | |
6926 | || (insn & (0x3f << 26)) == 50u << 26 /* lfd */ | |
6927 | || (insn & (0x3f << 26)) == 52u << 26 /* stfs */ | |
6928 | || (insn & (0x3f << 26)) == 54u << 26 /* stfd */ | |
6929 | || ((insn & (0x3f << 26)) == 58u << 26 /* lwa,ld,lmd */ | |
6930 | && (insn & 3) != 1) | |
6931 | || ((insn & (0x3f << 26)) == 62u << 26 /* std, stmd */ | |
6932 | && ((insn & 3) == 0 || (insn & 3) == 3)) | |
6933 | || (insn & (0x3f << 26)) == 12u << 26 /* addic */); | |
6934 | } | |
6935 | ||
3ea0a085 AM |
6936 | // Return the value to use for a branch relocation. |
6937 | ||
6938 | template<int size, bool big_endian> | |
1611bc4a | 6939 | bool |
3ea0a085 | 6940 | Target_powerpc<size, big_endian>::symval_for_branch( |
6c77229c | 6941 | const Symbol_table* symtab, |
3ea0a085 AM |
6942 | const Sized_symbol<size>* gsym, |
6943 | Powerpc_relobj<size, big_endian>* object, | |
1611bc4a | 6944 | Address *value, |
3ea0a085 AM |
6945 | unsigned int *dest_shndx) |
6946 | { | |
9055360d AM |
6947 | if (size == 32 || this->abiversion() >= 2) |
6948 | gold_unreachable(); | |
3ea0a085 | 6949 | *dest_shndx = 0; |
3ea0a085 AM |
6950 | |
6951 | // If the symbol is defined in an opd section, ie. is a function | |
6952 | // descriptor, use the function descriptor code entry address | |
6953 | Powerpc_relobj<size, big_endian>* symobj = object; | |
f3a0ed29 AM |
6954 | if (gsym != NULL |
6955 | && gsym->source() != Symbol::FROM_OBJECT) | |
1611bc4a | 6956 | return true; |
3ea0a085 AM |
6957 | if (gsym != NULL) |
6958 | symobj = static_cast<Powerpc_relobj<size, big_endian>*>(gsym->object()); | |
6959 | unsigned int shndx = symobj->opd_shndx(); | |
6960 | if (shndx == 0) | |
1611bc4a | 6961 | return true; |
3ea0a085 | 6962 | Address opd_addr = symobj->get_output_section_offset(shndx); |
a2d7bf59 | 6963 | if (opd_addr == invalid_address) |
1611bc4a | 6964 | return true; |
c6905c28 | 6965 | opd_addr += symobj->output_section_address(shndx); |
1611bc4a | 6966 | if (*value >= opd_addr && *value < opd_addr + symobj->section_size(shndx)) |
3ea0a085 AM |
6967 | { |
6968 | Address sec_off; | |
1611bc4a | 6969 | *dest_shndx = symobj->get_opd_ent(*value - opd_addr, &sec_off); |
6c77229c AM |
6970 | if (symtab->is_section_folded(symobj, *dest_shndx)) |
6971 | { | |
6972 | Section_id folded | |
6973 | = symtab->icf()->get_folded_section(symobj, *dest_shndx); | |
6974 | symobj = static_cast<Powerpc_relobj<size, big_endian>*>(folded.first); | |
6975 | *dest_shndx = folded.second; | |
6976 | } | |
3ea0a085 | 6977 | Address sec_addr = symobj->get_output_section_offset(*dest_shndx); |
1611bc4a AM |
6978 | if (sec_addr == invalid_address) |
6979 | return false; | |
6980 | ||
3ea0a085 | 6981 | sec_addr += symobj->output_section(*dest_shndx)->address(); |
1611bc4a | 6982 | *value = sec_addr + sec_off; |
3ea0a085 | 6983 | } |
1611bc4a | 6984 | return true; |
3ea0a085 AM |
6985 | } |
6986 | ||
42cacb20 DE |
6987 | // Perform a relocation. |
6988 | ||
6989 | template<int size, bool big_endian> | |
6990 | inline bool | |
6991 | Target_powerpc<size, big_endian>::Relocate::relocate( | |
d83ce4e3 AM |
6992 | const Relocate_info<size, big_endian>* relinfo, |
6993 | Target_powerpc* target, | |
6994 | Output_section* os, | |
6995 | size_t relnum, | |
6996 | const elfcpp::Rela<size, big_endian>& rela, | |
6997 | unsigned int r_type, | |
6998 | const Sized_symbol<size>* gsym, | |
6999 | const Symbol_value<size>* psymval, | |
7000 | unsigned char* view, | |
c9269dff AM |
7001 | Address address, |
7002 | section_size_type view_size) | |
42cacb20 | 7003 | { |
0e804863 ILT |
7004 | if (view == NULL) |
7005 | return true; | |
7006 | ||
e3deeb9c | 7007 | switch (this->maybe_skip_tls_get_addr_call(r_type, gsym)) |
dd93cd0a | 7008 | { |
e3deeb9c AM |
7009 | case Track_tls::NOT_EXPECTED: |
7010 | gold_error_at_location(relinfo, relnum, rela.get_r_offset(), | |
7011 | _("__tls_get_addr call lacks marker reloc")); | |
7012 | break; | |
7013 | case Track_tls::EXPECTED: | |
7014 | // We have already complained. | |
7015 | break; | |
7016 | case Track_tls::SKIP: | |
7017 | return true; | |
7018 | case Track_tls::NORMAL: | |
7019 | break; | |
dd93cd0a | 7020 | } |
dd93cd0a | 7021 | |
42cacb20 | 7022 | typedef Powerpc_relocate_functions<size, big_endian> Reloc; |
dd93cd0a | 7023 | typedef typename elfcpp::Swap<32, big_endian>::Valtype Insn; |
3ea0a085 AM |
7024 | Powerpc_relobj<size, big_endian>* const object |
7025 | = static_cast<Powerpc_relobj<size, big_endian>*>(relinfo->object); | |
dd93cd0a | 7026 | Address value = 0; |
0cfb0717 | 7027 | bool has_stub_value = false; |
e5d5f5ed | 7028 | unsigned int r_sym = elfcpp::elf_r_sym<size>(rela.get_r_info()); |
b3ccdeb5 | 7029 | if ((gsym != NULL |
88b8e639 | 7030 | ? gsym->use_plt_offset(Scan::get_reference_flags(r_type, target)) |
b3ccdeb5 AM |
7031 | : object->local_has_plt_offset(r_sym)) |
7032 | && (!psymval->is_ifunc_symbol() | |
9055360d | 7033 | || Scan::reloc_needs_plt_for_ifunc(target, object, r_type, false))) |
dd93cd0a | 7034 | { |
9055360d AM |
7035 | if (size == 64 |
7036 | && gsym != NULL | |
7037 | && target->abiversion() >= 2 | |
7038 | && !parameters->options().output_is_position_independent() | |
7039 | && !is_branch_reloc(r_type)) | |
ec661b9d | 7040 | { |
faa2211d AM |
7041 | Address off = target->glink_section()->find_global_entry(gsym); |
7042 | if (off != invalid_address) | |
6ec65f28 AM |
7043 | { |
7044 | value = target->glink_section()->global_entry_address() + off; | |
7045 | has_stub_value = true; | |
7046 | } | |
ec661b9d | 7047 | } |
c9824451 | 7048 | else |
9055360d AM |
7049 | { |
7050 | Stub_table<size, big_endian>* stub_table | |
7051 | = object->stub_table(relinfo->data_shndx); | |
7052 | if (stub_table == NULL) | |
7053 | { | |
7054 | // This is a ref from a data section to an ifunc symbol. | |
7055 | if (target->stub_tables().size() != 0) | |
7056 | stub_table = target->stub_tables()[0]; | |
7057 | } | |
faa2211d AM |
7058 | if (stub_table != NULL) |
7059 | { | |
7060 | Address off; | |
7061 | if (gsym != NULL) | |
7062 | off = stub_table->find_plt_call_entry(object, gsym, r_type, | |
7063 | rela.get_r_addend()); | |
7064 | else | |
7065 | off = stub_table->find_plt_call_entry(object, r_sym, r_type, | |
7066 | rela.get_r_addend()); | |
7067 | if (off != invalid_address) | |
7068 | { | |
7069 | value = stub_table->stub_address() + off; | |
7070 | has_stub_value = true; | |
7071 | } | |
7072 | } | |
9055360d | 7073 | } |
faa2211d AM |
7074 | // We don't care too much about bogus debug references to |
7075 | // non-local functions, but otherwise there had better be a plt | |
7076 | // call stub or global entry stub as appropriate. | |
7077 | gold_assert(has_stub_value || !(os->flags() & elfcpp::SHF_ALLOC)); | |
dd93cd0a | 7078 | } |
cf43a2fe AM |
7079 | |
7080 | if (r_type == elfcpp::R_POWERPC_GOT16 | |
7081 | || r_type == elfcpp::R_POWERPC_GOT16_LO | |
7082 | || r_type == elfcpp::R_POWERPC_GOT16_HI | |
7083 | || r_type == elfcpp::R_POWERPC_GOT16_HA | |
7084 | || r_type == elfcpp::R_PPC64_GOT16_DS | |
7085 | || r_type == elfcpp::R_PPC64_GOT16_LO_DS) | |
42cacb20 | 7086 | { |
cf43a2fe AM |
7087 | if (gsym != NULL) |
7088 | { | |
7089 | gold_assert(gsym->has_got_offset(GOT_TYPE_STANDARD)); | |
7090 | value = gsym->got_offset(GOT_TYPE_STANDARD); | |
7091 | } | |
7092 | else | |
7093 | { | |
7094 | unsigned int r_sym = elfcpp::elf_r_sym<size>(rela.get_r_info()); | |
7095 | gold_assert(object->local_has_got_offset(r_sym, GOT_TYPE_STANDARD)); | |
7096 | value = object->local_got_offset(r_sym, GOT_TYPE_STANDARD); | |
7097 | } | |
dd93cd0a | 7098 | value -= target->got_section()->got_base_offset(object); |
cf43a2fe AM |
7099 | } |
7100 | else if (r_type == elfcpp::R_PPC64_TOC) | |
7101 | { | |
c9269dff | 7102 | value = (target->got_section()->output_section()->address() |
dd93cd0a | 7103 | + object->toc_base_offset()); |
cf43a2fe AM |
7104 | } |
7105 | else if (gsym != NULL | |
7106 | && (r_type == elfcpp::R_POWERPC_REL24 | |
7107 | || r_type == elfcpp::R_PPC_PLTREL24) | |
0cfb0717 | 7108 | && has_stub_value) |
cf43a2fe | 7109 | { |
c9269dff AM |
7110 | if (size == 64) |
7111 | { | |
7112 | typedef typename elfcpp::Swap<32, big_endian>::Valtype Valtype; | |
7113 | Valtype* wv = reinterpret_cast<Valtype*>(view); | |
7114 | bool can_plt_call = false; | |
7115 | if (rela.get_r_offset() + 8 <= view_size) | |
7116 | { | |
3ea0a085 | 7117 | Valtype insn = elfcpp::Swap<32, big_endian>::readval(wv); |
c9269dff | 7118 | Valtype insn2 = elfcpp::Swap<32, big_endian>::readval(wv + 1); |
3ea0a085 AM |
7119 | if ((insn & 1) != 0 |
7120 | && (insn2 == nop | |
7121 | || insn2 == cror_15_15_15 || insn2 == cror_31_31_31)) | |
c9269dff | 7122 | { |
b4f7960d AM |
7123 | elfcpp::Swap<32, big_endian>:: |
7124 | writeval(wv + 1, ld_2_1 + target->stk_toc()); | |
c9269dff AM |
7125 | can_plt_call = true; |
7126 | } | |
7127 | } | |
7128 | if (!can_plt_call) | |
3ea0a085 AM |
7129 | { |
7130 | // If we don't have a branch and link followed by a nop, | |
7131 | // we can't go via the plt because there is no place to | |
7132 | // put a toc restoring instruction. | |
7133 | // Unless we know we won't be returning. | |
7134 | if (strcmp(gsym->name(), "__libc_start_main") == 0) | |
7135 | can_plt_call = true; | |
7136 | } | |
7137 | if (!can_plt_call) | |
7138 | { | |
ba8ca3e7 AM |
7139 | // g++ as of 20130507 emits self-calls without a |
7140 | // following nop. This is arguably wrong since we have | |
7141 | // conflicting information. On the one hand a global | |
7142 | // symbol and on the other a local call sequence, but | |
7143 | // don't error for this special case. | |
7144 | // It isn't possible to cheaply verify we have exactly | |
7145 | // such a call. Allow all calls to the same section. | |
3ea0a085 | 7146 | bool ok = false; |
c9824451 | 7147 | Address code = value; |
3ea0a085 AM |
7148 | if (gsym->source() == Symbol::FROM_OBJECT |
7149 | && gsym->object() == object) | |
7150 | { | |
9055360d AM |
7151 | unsigned int dest_shndx = 0; |
7152 | if (target->abiversion() < 2) | |
7153 | { | |
7154 | Address addend = rela.get_r_addend(); | |
1611bc4a AM |
7155 | code = psymval->value(object, addend); |
7156 | target->symval_for_branch(relinfo->symtab, gsym, object, | |
7157 | &code, &dest_shndx); | |
9055360d | 7158 | } |
3ea0a085 AM |
7159 | bool is_ordinary; |
7160 | if (dest_shndx == 0) | |
7161 | dest_shndx = gsym->shndx(&is_ordinary); | |
7162 | ok = dest_shndx == relinfo->data_shndx; | |
7163 | } | |
7164 | if (!ok) | |
c9824451 AM |
7165 | { |
7166 | gold_error_at_location(relinfo, relnum, rela.get_r_offset(), | |
7167 | _("call lacks nop, can't restore toc; " | |
7168 | "recompile with -fPIC")); | |
7169 | value = code; | |
7170 | } | |
3ea0a085 | 7171 | } |
c9269dff | 7172 | } |
cf43a2fe | 7173 | } |
dd93cd0a AM |
7174 | else if (r_type == elfcpp::R_POWERPC_GOT_TLSGD16 |
7175 | || r_type == elfcpp::R_POWERPC_GOT_TLSGD16_LO | |
7176 | || r_type == elfcpp::R_POWERPC_GOT_TLSGD16_HI | |
7177 | || r_type == elfcpp::R_POWERPC_GOT_TLSGD16_HA) | |
7178 | { | |
7179 | // First instruction of a global dynamic sequence, arg setup insn. | |
7180 | const bool final = gsym == NULL || gsym->final_value_is_known(); | |
7181 | const tls::Tls_optimization tls_type = target->optimize_tls_gd(final); | |
7182 | enum Got_type got_type = GOT_TYPE_STANDARD; | |
7183 | if (tls_type == tls::TLSOPT_NONE) | |
7184 | got_type = GOT_TYPE_TLSGD; | |
7185 | else if (tls_type == tls::TLSOPT_TO_IE) | |
7186 | got_type = GOT_TYPE_TPREL; | |
7187 | if (got_type != GOT_TYPE_STANDARD) | |
7188 | { | |
7189 | if (gsym != NULL) | |
7190 | { | |
7191 | gold_assert(gsym->has_got_offset(got_type)); | |
7192 | value = gsym->got_offset(got_type); | |
7193 | } | |
7194 | else | |
7195 | { | |
7196 | unsigned int r_sym = elfcpp::elf_r_sym<size>(rela.get_r_info()); | |
7197 | gold_assert(object->local_has_got_offset(r_sym, got_type)); | |
7198 | value = object->local_got_offset(r_sym, got_type); | |
7199 | } | |
7200 | value -= target->got_section()->got_base_offset(object); | |
7201 | } | |
7202 | if (tls_type == tls::TLSOPT_TO_IE) | |
7203 | { | |
7204 | if (r_type == elfcpp::R_POWERPC_GOT_TLSGD16 | |
7205 | || r_type == elfcpp::R_POWERPC_GOT_TLSGD16_LO) | |
7206 | { | |
7207 | Insn* iview = reinterpret_cast<Insn*>(view - 2 * big_endian); | |
7208 | Insn insn = elfcpp::Swap<32, big_endian>::readval(iview); | |
7209 | insn &= (1 << 26) - (1 << 16); // extract rt,ra from addi | |
7210 | if (size == 32) | |
7211 | insn |= 32 << 26; // lwz | |
7212 | else | |
7213 | insn |= 58 << 26; // ld | |
7214 | elfcpp::Swap<32, big_endian>::writeval(iview, insn); | |
7215 | } | |
7216 | r_type += (elfcpp::R_POWERPC_GOT_TPREL16 | |
7217 | - elfcpp::R_POWERPC_GOT_TLSGD16); | |
7218 | } | |
7219 | else if (tls_type == tls::TLSOPT_TO_LE) | |
7220 | { | |
7221 | if (r_type == elfcpp::R_POWERPC_GOT_TLSGD16 | |
7222 | || r_type == elfcpp::R_POWERPC_GOT_TLSGD16_LO) | |
7223 | { | |
7224 | Insn* iview = reinterpret_cast<Insn*>(view - 2 * big_endian); | |
0f81d3f0 AM |
7225 | Insn insn = elfcpp::Swap<32, big_endian>::readval(iview); |
7226 | insn &= (1 << 26) - (1 << 21); // extract rt | |
dd93cd0a | 7227 | if (size == 32) |
0f81d3f0 AM |
7228 | insn |= addis_0_2; |
7229 | else | |
7230 | insn |= addis_0_13; | |
dd93cd0a AM |
7231 | elfcpp::Swap<32, big_endian>::writeval(iview, insn); |
7232 | r_type = elfcpp::R_POWERPC_TPREL16_HA; | |
7233 | value = psymval->value(object, rela.get_r_addend()); | |
7234 | } | |
7235 | else | |
7236 | { | |
7237 | Insn* iview = reinterpret_cast<Insn*>(view - 2 * big_endian); | |
7238 | Insn insn = nop; | |
7239 | elfcpp::Swap<32, big_endian>::writeval(iview, insn); | |
7240 | r_type = elfcpp::R_POWERPC_NONE; | |
7241 | } | |
7242 | } | |
7243 | } | |
7244 | else if (r_type == elfcpp::R_POWERPC_GOT_TLSLD16 | |
7245 | || r_type == elfcpp::R_POWERPC_GOT_TLSLD16_LO | |
7246 | || r_type == elfcpp::R_POWERPC_GOT_TLSLD16_HI | |
7247 | || r_type == elfcpp::R_POWERPC_GOT_TLSLD16_HA) | |
7248 | { | |
7249 | // First instruction of a local dynamic sequence, arg setup insn. | |
7250 | const tls::Tls_optimization tls_type = target->optimize_tls_ld(); | |
7251 | if (tls_type == tls::TLSOPT_NONE) | |
7252 | { | |
7253 | value = target->tlsld_got_offset(); | |
7254 | value -= target->got_section()->got_base_offset(object); | |
7255 | } | |
7256 | else | |
7257 | { | |
7258 | gold_assert(tls_type == tls::TLSOPT_TO_LE); | |
7259 | if (r_type == elfcpp::R_POWERPC_GOT_TLSLD16 | |
7260 | || r_type == elfcpp::R_POWERPC_GOT_TLSLD16_LO) | |
7261 | { | |
7262 | Insn* iview = reinterpret_cast<Insn*>(view - 2 * big_endian); | |
0f81d3f0 AM |
7263 | Insn insn = elfcpp::Swap<32, big_endian>::readval(iview); |
7264 | insn &= (1 << 26) - (1 << 21); // extract rt | |
dd93cd0a | 7265 | if (size == 32) |
0f81d3f0 AM |
7266 | insn |= addis_0_2; |
7267 | else | |
7268 | insn |= addis_0_13; | |
dd93cd0a AM |
7269 | elfcpp::Swap<32, big_endian>::writeval(iview, insn); |
7270 | r_type = elfcpp::R_POWERPC_TPREL16_HA; | |
7404fe1b | 7271 | value = dtp_offset; |
dd93cd0a AM |
7272 | } |
7273 | else | |
7274 | { | |
7275 | Insn* iview = reinterpret_cast<Insn*>(view - 2 * big_endian); | |
7276 | Insn insn = nop; | |
7277 | elfcpp::Swap<32, big_endian>::writeval(iview, insn); | |
7278 | r_type = elfcpp::R_POWERPC_NONE; | |
7279 | } | |
7280 | } | |
7281 | } | |
7282 | else if (r_type == elfcpp::R_POWERPC_GOT_DTPREL16 | |
7283 | || r_type == elfcpp::R_POWERPC_GOT_DTPREL16_LO | |
7284 | || r_type == elfcpp::R_POWERPC_GOT_DTPREL16_HI | |
7285 | || r_type == elfcpp::R_POWERPC_GOT_DTPREL16_HA) | |
7286 | { | |
7287 | // Accesses relative to a local dynamic sequence address, | |
7288 | // no optimisation here. | |
7289 | if (gsym != NULL) | |
7290 | { | |
7291 | gold_assert(gsym->has_got_offset(GOT_TYPE_DTPREL)); | |
7292 | value = gsym->got_offset(GOT_TYPE_DTPREL); | |
7293 | } | |
7294 | else | |
7295 | { | |
7296 | unsigned int r_sym = elfcpp::elf_r_sym<size>(rela.get_r_info()); | |
7297 | gold_assert(object->local_has_got_offset(r_sym, GOT_TYPE_DTPREL)); | |
7298 | value = object->local_got_offset(r_sym, GOT_TYPE_DTPREL); | |
7299 | } | |
7300 | value -= target->got_section()->got_base_offset(object); | |
7301 | } | |
7302 | else if (r_type == elfcpp::R_POWERPC_GOT_TPREL16 | |
7303 | || r_type == elfcpp::R_POWERPC_GOT_TPREL16_LO | |
7304 | || r_type == elfcpp::R_POWERPC_GOT_TPREL16_HI | |
7305 | || r_type == elfcpp::R_POWERPC_GOT_TPREL16_HA) | |
7306 | { | |
7307 | // First instruction of initial exec sequence. | |
7308 | const bool final = gsym == NULL || gsym->final_value_is_known(); | |
7309 | const tls::Tls_optimization tls_type = target->optimize_tls_ie(final); | |
7310 | if (tls_type == tls::TLSOPT_NONE) | |
7311 | { | |
7312 | if (gsym != NULL) | |
7313 | { | |
7314 | gold_assert(gsym->has_got_offset(GOT_TYPE_TPREL)); | |
7315 | value = gsym->got_offset(GOT_TYPE_TPREL); | |
7316 | } | |
7317 | else | |
7318 | { | |
7319 | unsigned int r_sym = elfcpp::elf_r_sym<size>(rela.get_r_info()); | |
7320 | gold_assert(object->local_has_got_offset(r_sym, GOT_TYPE_TPREL)); | |
7321 | value = object->local_got_offset(r_sym, GOT_TYPE_TPREL); | |
7322 | } | |
7323 | value -= target->got_section()->got_base_offset(object); | |
7324 | } | |
7325 | else | |
7326 | { | |
7327 | gold_assert(tls_type == tls::TLSOPT_TO_LE); | |
7328 | if (r_type == elfcpp::R_POWERPC_GOT_TPREL16 | |
7329 | || r_type == elfcpp::R_POWERPC_GOT_TPREL16_LO) | |
7330 | { | |
7331 | Insn* iview = reinterpret_cast<Insn*>(view - 2 * big_endian); | |
7332 | Insn insn = elfcpp::Swap<32, big_endian>::readval(iview); | |
7333 | insn &= (1 << 26) - (1 << 21); // extract rt from ld | |
7334 | if (size == 32) | |
7335 | insn |= addis_0_2; | |
7336 | else | |
7337 | insn |= addis_0_13; | |
7338 | elfcpp::Swap<32, big_endian>::writeval(iview, insn); | |
7339 | r_type = elfcpp::R_POWERPC_TPREL16_HA; | |
7340 | value = psymval->value(object, rela.get_r_addend()); | |
7341 | } | |
7342 | else | |
7343 | { | |
7344 | Insn* iview = reinterpret_cast<Insn*>(view - 2 * big_endian); | |
7345 | Insn insn = nop; | |
7346 | elfcpp::Swap<32, big_endian>::writeval(iview, insn); | |
7347 | r_type = elfcpp::R_POWERPC_NONE; | |
7348 | } | |
7349 | } | |
7350 | } | |
7351 | else if ((size == 64 && r_type == elfcpp::R_PPC64_TLSGD) | |
7352 | || (size == 32 && r_type == elfcpp::R_PPC_TLSGD)) | |
7353 | { | |
7354 | // Second instruction of a global dynamic sequence, | |
7355 | // the __tls_get_addr call | |
e3deeb9c | 7356 | this->expect_tls_get_addr_call(relinfo, relnum, rela.get_r_offset()); |
dd93cd0a AM |
7357 | const bool final = gsym == NULL || gsym->final_value_is_known(); |
7358 | const tls::Tls_optimization tls_type = target->optimize_tls_gd(final); | |
7359 | if (tls_type != tls::TLSOPT_NONE) | |
7360 | { | |
7361 | if (tls_type == tls::TLSOPT_TO_IE) | |
7362 | { | |
7363 | Insn* iview = reinterpret_cast<Insn*>(view); | |
7364 | Insn insn = add_3_3_13; | |
7365 | if (size == 32) | |
7366 | insn = add_3_3_2; | |
7367 | elfcpp::Swap<32, big_endian>::writeval(iview, insn); | |
7368 | r_type = elfcpp::R_POWERPC_NONE; | |
7369 | } | |
7370 | else | |
7371 | { | |
7372 | Insn* iview = reinterpret_cast<Insn*>(view); | |
7373 | Insn insn = addi_3_3; | |
7374 | elfcpp::Swap<32, big_endian>::writeval(iview, insn); | |
7375 | r_type = elfcpp::R_POWERPC_TPREL16_LO; | |
7376 | view += 2 * big_endian; | |
7377 | value = psymval->value(object, rela.get_r_addend()); | |
7378 | } | |
e3deeb9c | 7379 | this->skip_next_tls_get_addr_call(); |
dd93cd0a AM |
7380 | } |
7381 | } | |
7382 | else if ((size == 64 && r_type == elfcpp::R_PPC64_TLSLD) | |
7383 | || (size == 32 && r_type == elfcpp::R_PPC_TLSLD)) | |
7384 | { | |
7385 | // Second instruction of a local dynamic sequence, | |
7386 | // the __tls_get_addr call | |
e3deeb9c | 7387 | this->expect_tls_get_addr_call(relinfo, relnum, rela.get_r_offset()); |
dd93cd0a AM |
7388 | const tls::Tls_optimization tls_type = target->optimize_tls_ld(); |
7389 | if (tls_type == tls::TLSOPT_TO_LE) | |
7390 | { | |
7391 | Insn* iview = reinterpret_cast<Insn*>(view); | |
7392 | Insn insn = addi_3_3; | |
7393 | elfcpp::Swap<32, big_endian>::writeval(iview, insn); | |
e3deeb9c | 7394 | this->skip_next_tls_get_addr_call(); |
dd93cd0a AM |
7395 | r_type = elfcpp::R_POWERPC_TPREL16_LO; |
7396 | view += 2 * big_endian; | |
7404fe1b | 7397 | value = dtp_offset; |
dd93cd0a AM |
7398 | } |
7399 | } | |
7400 | else if (r_type == elfcpp::R_POWERPC_TLS) | |
7401 | { | |
7402 | // Second instruction of an initial exec sequence | |
7403 | const bool final = gsym == NULL || gsym->final_value_is_known(); | |
7404 | const tls::Tls_optimization tls_type = target->optimize_tls_ie(final); | |
7405 | if (tls_type == tls::TLSOPT_TO_LE) | |
7406 | { | |
7407 | Insn* iview = reinterpret_cast<Insn*>(view); | |
7408 | Insn insn = elfcpp::Swap<32, big_endian>::readval(iview); | |
7409 | unsigned int reg = size == 32 ? 2 : 13; | |
7410 | insn = at_tls_transform(insn, reg); | |
7411 | gold_assert(insn != 0); | |
7412 | elfcpp::Swap<32, big_endian>::writeval(iview, insn); | |
7413 | r_type = elfcpp::R_POWERPC_TPREL16_LO; | |
7414 | view += 2 * big_endian; | |
7415 | value = psymval->value(object, rela.get_r_addend()); | |
7416 | } | |
7417 | } | |
0cfb0717 | 7418 | else if (!has_stub_value) |
cf43a2fe | 7419 | { |
dd93cd0a | 7420 | Address addend = 0; |
cbcb23fa | 7421 | if (!(size == 32 && r_type == elfcpp::R_PPC_PLTREL24)) |
cf43a2fe | 7422 | addend = rela.get_r_addend(); |
c9824451 | 7423 | value = psymval->value(object, addend); |
dd93cd0a | 7424 | if (size == 64 && is_branch_reloc(r_type)) |
9055360d AM |
7425 | { |
7426 | if (target->abiversion() >= 2) | |
7427 | { | |
7428 | if (gsym != NULL) | |
7429 | value += object->ppc64_local_entry_offset(gsym); | |
7430 | else | |
7431 | value += object->ppc64_local_entry_offset(r_sym); | |
7432 | } | |
7433 | else | |
1611bc4a AM |
7434 | { |
7435 | unsigned int dest_shndx; | |
7436 | target->symval_for_branch(relinfo->symtab, gsym, object, | |
7437 | &value, &dest_shndx); | |
7438 | } | |
9055360d | 7439 | } |
cbcb23fa | 7440 | Address max_branch_offset = max_branch_delta(r_type); |
ec661b9d AM |
7441 | if (max_branch_offset != 0 |
7442 | && value - address + max_branch_offset >= 2 * max_branch_offset) | |
7443 | { | |
7444 | Stub_table<size, big_endian>* stub_table | |
7445 | = object->stub_table(relinfo->data_shndx); | |
0cfdc767 AM |
7446 | if (stub_table != NULL) |
7447 | { | |
7448 | Address off = stub_table->find_long_branch_entry(object, value); | |
7449 | if (off != invalid_address) | |
0cfb0717 AM |
7450 | { |
7451 | value = (stub_table->stub_address() + stub_table->plt_size() | |
7452 | + off); | |
7453 | has_stub_value = true; | |
7454 | } | |
0cfdc767 | 7455 | } |
ec661b9d | 7456 | } |
42cacb20 DE |
7457 | } |
7458 | ||
42cacb20 DE |
7459 | switch (r_type) |
7460 | { | |
dd93cd0a AM |
7461 | case elfcpp::R_PPC64_REL64: |
7462 | case elfcpp::R_POWERPC_REL32: | |
7463 | case elfcpp::R_POWERPC_REL24: | |
7464 | case elfcpp::R_PPC_PLTREL24: | |
7465 | case elfcpp::R_PPC_LOCAL24PC: | |
7466 | case elfcpp::R_POWERPC_REL16: | |
7467 | case elfcpp::R_POWERPC_REL16_LO: | |
7468 | case elfcpp::R_POWERPC_REL16_HI: | |
7469 | case elfcpp::R_POWERPC_REL16_HA: | |
a680de9a | 7470 | case elfcpp::R_POWERPC_REL16DX_HA: |
dd93cd0a AM |
7471 | case elfcpp::R_POWERPC_REL14: |
7472 | case elfcpp::R_POWERPC_REL14_BRTAKEN: | |
7473 | case elfcpp::R_POWERPC_REL14_BRNTAKEN: | |
7474 | value -= address; | |
7475 | break; | |
7476 | ||
42cacb20 DE |
7477 | case elfcpp::R_PPC64_TOC16: |
7478 | case elfcpp::R_PPC64_TOC16_LO: | |
7479 | case elfcpp::R_PPC64_TOC16_HI: | |
7480 | case elfcpp::R_PPC64_TOC16_HA: | |
7481 | case elfcpp::R_PPC64_TOC16_DS: | |
7482 | case elfcpp::R_PPC64_TOC16_LO_DS: | |
cf43a2fe | 7483 | // Subtract the TOC base address. |
c9269dff | 7484 | value -= (target->got_section()->output_section()->address() |
dd93cd0a | 7485 | + object->toc_base_offset()); |
42cacb20 DE |
7486 | break; |
7487 | ||
cf43a2fe AM |
7488 | case elfcpp::R_POWERPC_SECTOFF: |
7489 | case elfcpp::R_POWERPC_SECTOFF_LO: | |
7490 | case elfcpp::R_POWERPC_SECTOFF_HI: | |
7491 | case elfcpp::R_POWERPC_SECTOFF_HA: | |
7492 | case elfcpp::R_PPC64_SECTOFF_DS: | |
7493 | case elfcpp::R_PPC64_SECTOFF_LO_DS: | |
7494 | if (os != NULL) | |
7495 | value -= os->address(); | |
42cacb20 DE |
7496 | break; |
7497 | ||
dd93cd0a AM |
7498 | case elfcpp::R_PPC64_TPREL16_DS: |
7499 | case elfcpp::R_PPC64_TPREL16_LO_DS: | |
f9c6b907 AM |
7500 | case elfcpp::R_PPC64_TPREL16_HIGH: |
7501 | case elfcpp::R_PPC64_TPREL16_HIGHA: | |
dd93cd0a | 7502 | if (size != 64) |
f9c6b907 | 7503 | // R_PPC_TLSGD, R_PPC_TLSLD, R_PPC_EMB_RELST_LO, R_PPC_EMB_RELST_HI |
dd93cd0a AM |
7504 | break; |
7505 | case elfcpp::R_POWERPC_TPREL16: | |
7506 | case elfcpp::R_POWERPC_TPREL16_LO: | |
7507 | case elfcpp::R_POWERPC_TPREL16_HI: | |
7508 | case elfcpp::R_POWERPC_TPREL16_HA: | |
7509 | case elfcpp::R_POWERPC_TPREL: | |
7510 | case elfcpp::R_PPC64_TPREL16_HIGHER: | |
7511 | case elfcpp::R_PPC64_TPREL16_HIGHERA: | |
7512 | case elfcpp::R_PPC64_TPREL16_HIGHEST: | |
7513 | case elfcpp::R_PPC64_TPREL16_HIGHESTA: | |
7514 | // tls symbol values are relative to tls_segment()->vaddr() | |
7515 | value -= tp_offset; | |
7516 | break; | |
7517 | ||
7518 | case elfcpp::R_PPC64_DTPREL16_DS: | |
7519 | case elfcpp::R_PPC64_DTPREL16_LO_DS: | |
7520 | case elfcpp::R_PPC64_DTPREL16_HIGHER: | |
7521 | case elfcpp::R_PPC64_DTPREL16_HIGHERA: | |
7522 | case elfcpp::R_PPC64_DTPREL16_HIGHEST: | |
7523 | case elfcpp::R_PPC64_DTPREL16_HIGHESTA: | |
7524 | if (size != 64) | |
7525 | // R_PPC_EMB_NADDR32, R_PPC_EMB_NADDR16, R_PPC_EMB_NADDR16_LO | |
7526 | // R_PPC_EMB_NADDR16_HI, R_PPC_EMB_NADDR16_HA, R_PPC_EMB_SDAI16 | |
7527 | break; | |
7528 | case elfcpp::R_POWERPC_DTPREL16: | |
7529 | case elfcpp::R_POWERPC_DTPREL16_LO: | |
7530 | case elfcpp::R_POWERPC_DTPREL16_HI: | |
7531 | case elfcpp::R_POWERPC_DTPREL16_HA: | |
7532 | case elfcpp::R_POWERPC_DTPREL: | |
f9c6b907 AM |
7533 | case elfcpp::R_PPC64_DTPREL16_HIGH: |
7534 | case elfcpp::R_PPC64_DTPREL16_HIGHA: | |
dd93cd0a AM |
7535 | // tls symbol values are relative to tls_segment()->vaddr() |
7536 | value -= dtp_offset; | |
7537 | break; | |
7538 | ||
45965137 AM |
7539 | case elfcpp::R_PPC64_ADDR64_LOCAL: |
7540 | if (gsym != NULL) | |
7541 | value += object->ppc64_local_entry_offset(gsym); | |
7542 | else | |
7543 | value += object->ppc64_local_entry_offset(r_sym); | |
7544 | break; | |
7545 | ||
42cacb20 DE |
7546 | default: |
7547 | break; | |
7548 | } | |
7549 | ||
dd93cd0a | 7550 | Insn branch_bit = 0; |
42cacb20 DE |
7551 | switch (r_type) |
7552 | { | |
dd93cd0a AM |
7553 | case elfcpp::R_POWERPC_ADDR14_BRTAKEN: |
7554 | case elfcpp::R_POWERPC_REL14_BRTAKEN: | |
7555 | branch_bit = 1 << 21; | |
7556 | case elfcpp::R_POWERPC_ADDR14_BRNTAKEN: | |
7557 | case elfcpp::R_POWERPC_REL14_BRNTAKEN: | |
7558 | { | |
7559 | Insn* iview = reinterpret_cast<Insn*>(view); | |
7560 | Insn insn = elfcpp::Swap<32, big_endian>::readval(iview); | |
7561 | insn &= ~(1 << 21); | |
7562 | insn |= branch_bit; | |
7563 | if (this->is_isa_v2) | |
7564 | { | |
7565 | // Set 'a' bit. This is 0b00010 in BO field for branch | |
7566 | // on CR(BI) insns (BO == 001at or 011at), and 0b01000 | |
7567 | // for branch on CTR insns (BO == 1a00t or 1a01t). | |
7568 | if ((insn & (0x14 << 21)) == (0x04 << 21)) | |
7569 | insn |= 0x02 << 21; | |
7570 | else if ((insn & (0x14 << 21)) == (0x10 << 21)) | |
7571 | insn |= 0x08 << 21; | |
7572 | else | |
7573 | break; | |
7574 | } | |
7575 | else | |
7576 | { | |
7577 | // Invert 'y' bit if not the default. | |
7578 | if (static_cast<Signed_address>(value) < 0) | |
7579 | insn ^= 1 << 21; | |
7580 | } | |
7581 | elfcpp::Swap<32, big_endian>::writeval(iview, insn); | |
7582 | } | |
7583 | break; | |
7584 | ||
7585 | default: | |
7586 | break; | |
7587 | } | |
7588 | ||
aba6bc71 AM |
7589 | if (size == 64) |
7590 | { | |
7591 | // Multi-instruction sequences that access the TOC can be | |
7592 | // optimized, eg. addis ra,r2,0; addi rb,ra,x; | |
7593 | // to nop; addi rb,r2,x; | |
7594 | switch (r_type) | |
7595 | { | |
7596 | default: | |
7597 | break; | |
7598 | ||
7599 | case elfcpp::R_POWERPC_GOT_TLSLD16_HA: | |
7600 | case elfcpp::R_POWERPC_GOT_TLSGD16_HA: | |
7601 | case elfcpp::R_POWERPC_GOT_TPREL16_HA: | |
7602 | case elfcpp::R_POWERPC_GOT_DTPREL16_HA: | |
7603 | case elfcpp::R_POWERPC_GOT16_HA: | |
7604 | case elfcpp::R_PPC64_TOC16_HA: | |
d8f5a274 | 7605 | if (parameters->options().toc_optimize()) |
aba6bc71 AM |
7606 | { |
7607 | Insn* iview = reinterpret_cast<Insn*>(view - 2 * big_endian); | |
7608 | Insn insn = elfcpp::Swap<32, big_endian>::readval(iview); | |
7609 | if ((insn & ((0x3f << 26) | 0x1f << 16)) | |
7610 | != ((15u << 26) | (2 << 16)) /* addis rt,2,imm */) | |
7611 | gold_error_at_location(relinfo, relnum, rela.get_r_offset(), | |
7612 | _("toc optimization is not supported " | |
7613 | "for %#08x instruction"), insn); | |
7614 | else if (value + 0x8000 < 0x10000) | |
7615 | { | |
7616 | elfcpp::Swap<32, big_endian>::writeval(iview, nop); | |
7617 | return true; | |
7618 | } | |
7619 | } | |
7620 | break; | |
7621 | ||
7622 | case elfcpp::R_POWERPC_GOT_TLSLD16_LO: | |
7623 | case elfcpp::R_POWERPC_GOT_TLSGD16_LO: | |
7624 | case elfcpp::R_POWERPC_GOT_TPREL16_LO: | |
7625 | case elfcpp::R_POWERPC_GOT_DTPREL16_LO: | |
7626 | case elfcpp::R_POWERPC_GOT16_LO: | |
7627 | case elfcpp::R_PPC64_GOT16_LO_DS: | |
7628 | case elfcpp::R_PPC64_TOC16_LO: | |
7629 | case elfcpp::R_PPC64_TOC16_LO_DS: | |
d8f5a274 | 7630 | if (parameters->options().toc_optimize()) |
aba6bc71 AM |
7631 | { |
7632 | Insn* iview = reinterpret_cast<Insn*>(view - 2 * big_endian); | |
7633 | Insn insn = elfcpp::Swap<32, big_endian>::readval(iview); | |
7634 | if (!ok_lo_toc_insn(insn)) | |
7635 | gold_error_at_location(relinfo, relnum, rela.get_r_offset(), | |
7636 | _("toc optimization is not supported " | |
7637 | "for %#08x instruction"), insn); | |
7638 | else if (value + 0x8000 < 0x10000) | |
7639 | { | |
7640 | if ((insn & (0x3f << 26)) == 12u << 26 /* addic */) | |
7641 | { | |
7642 | // Transform addic to addi when we change reg. | |
7643 | insn &= ~((0x3f << 26) | (0x1f << 16)); | |
7644 | insn |= (14u << 26) | (2 << 16); | |
7645 | } | |
7646 | else | |
7647 | { | |
7648 | insn &= ~(0x1f << 16); | |
7649 | insn |= 2 << 16; | |
7650 | } | |
7651 | elfcpp::Swap<32, big_endian>::writeval(iview, insn); | |
7652 | } | |
7653 | } | |
7654 | break; | |
7655 | } | |
7656 | } | |
7657 | ||
f4baf0d4 | 7658 | typename Reloc::Overflow_check overflow = Reloc::CHECK_NONE; |
b80eed39 | 7659 | elfcpp::Shdr<size, big_endian> shdr(relinfo->data_shdr); |
dd93cd0a AM |
7660 | switch (r_type) |
7661 | { | |
7662 | case elfcpp::R_POWERPC_ADDR32: | |
7663 | case elfcpp::R_POWERPC_UADDR32: | |
7664 | if (size == 64) | |
f4baf0d4 | 7665 | overflow = Reloc::CHECK_BITFIELD; |
42cacb20 DE |
7666 | break; |
7667 | ||
7668 | case elfcpp::R_POWERPC_REL32: | |
a680de9a | 7669 | case elfcpp::R_POWERPC_REL16DX_HA: |
dd93cd0a | 7670 | if (size == 64) |
f4baf0d4 | 7671 | overflow = Reloc::CHECK_SIGNED; |
dd93cd0a AM |
7672 | break; |
7673 | ||
dd93cd0a | 7674 | case elfcpp::R_POWERPC_UADDR16: |
f4baf0d4 | 7675 | overflow = Reloc::CHECK_BITFIELD; |
42cacb20 DE |
7676 | break; |
7677 | ||
b80eed39 AM |
7678 | case elfcpp::R_POWERPC_ADDR16: |
7679 | // We really should have three separate relocations, | |
7680 | // one for 16-bit data, one for insns with 16-bit signed fields, | |
7681 | // and one for insns with 16-bit unsigned fields. | |
7682 | overflow = Reloc::CHECK_BITFIELD; | |
7683 | if ((shdr.get_sh_flags() & elfcpp::SHF_EXECINSTR) != 0) | |
7684 | overflow = Reloc::CHECK_LOW_INSN; | |
7685 | break; | |
7686 | ||
f9c6b907 AM |
7687 | case elfcpp::R_POWERPC_ADDR16_HI: |
7688 | case elfcpp::R_POWERPC_ADDR16_HA: | |
7689 | case elfcpp::R_POWERPC_GOT16_HI: | |
7690 | case elfcpp::R_POWERPC_GOT16_HA: | |
7691 | case elfcpp::R_POWERPC_PLT16_HI: | |
7692 | case elfcpp::R_POWERPC_PLT16_HA: | |
7693 | case elfcpp::R_POWERPC_SECTOFF_HI: | |
7694 | case elfcpp::R_POWERPC_SECTOFF_HA: | |
7695 | case elfcpp::R_PPC64_TOC16_HI: | |
7696 | case elfcpp::R_PPC64_TOC16_HA: | |
7697 | case elfcpp::R_PPC64_PLTGOT16_HI: | |
7698 | case elfcpp::R_PPC64_PLTGOT16_HA: | |
7699 | case elfcpp::R_POWERPC_TPREL16_HI: | |
7700 | case elfcpp::R_POWERPC_TPREL16_HA: | |
7701 | case elfcpp::R_POWERPC_DTPREL16_HI: | |
7702 | case elfcpp::R_POWERPC_DTPREL16_HA: | |
7703 | case elfcpp::R_POWERPC_GOT_TLSGD16_HI: | |
7704 | case elfcpp::R_POWERPC_GOT_TLSGD16_HA: | |
7705 | case elfcpp::R_POWERPC_GOT_TLSLD16_HI: | |
7706 | case elfcpp::R_POWERPC_GOT_TLSLD16_HA: | |
7707 | case elfcpp::R_POWERPC_GOT_TPREL16_HI: | |
7708 | case elfcpp::R_POWERPC_GOT_TPREL16_HA: | |
7709 | case elfcpp::R_POWERPC_GOT_DTPREL16_HI: | |
7710 | case elfcpp::R_POWERPC_GOT_DTPREL16_HA: | |
7711 | case elfcpp::R_POWERPC_REL16_HI: | |
7712 | case elfcpp::R_POWERPC_REL16_HA: | |
b80eed39 AM |
7713 | if (size != 32) |
7714 | overflow = Reloc::CHECK_HIGH_INSN; | |
7715 | break; | |
7716 | ||
dd93cd0a AM |
7717 | case elfcpp::R_POWERPC_REL16: |
7718 | case elfcpp::R_PPC64_TOC16: | |
7719 | case elfcpp::R_POWERPC_GOT16: | |
7720 | case elfcpp::R_POWERPC_SECTOFF: | |
7721 | case elfcpp::R_POWERPC_TPREL16: | |
7722 | case elfcpp::R_POWERPC_DTPREL16: | |
b80eed39 AM |
7723 | case elfcpp::R_POWERPC_GOT_TLSGD16: |
7724 | case elfcpp::R_POWERPC_GOT_TLSLD16: | |
7725 | case elfcpp::R_POWERPC_GOT_TPREL16: | |
7726 | case elfcpp::R_POWERPC_GOT_DTPREL16: | |
7727 | overflow = Reloc::CHECK_LOW_INSN; | |
7728 | break; | |
7729 | ||
7730 | case elfcpp::R_POWERPC_ADDR24: | |
7731 | case elfcpp::R_POWERPC_ADDR14: | |
7732 | case elfcpp::R_POWERPC_ADDR14_BRTAKEN: | |
7733 | case elfcpp::R_POWERPC_ADDR14_BRNTAKEN: | |
7734 | case elfcpp::R_PPC64_ADDR16_DS: | |
7735 | case elfcpp::R_POWERPC_REL24: | |
7736 | case elfcpp::R_PPC_PLTREL24: | |
7737 | case elfcpp::R_PPC_LOCAL24PC: | |
dd93cd0a AM |
7738 | case elfcpp::R_PPC64_TPREL16_DS: |
7739 | case elfcpp::R_PPC64_DTPREL16_DS: | |
7740 | case elfcpp::R_PPC64_TOC16_DS: | |
7741 | case elfcpp::R_PPC64_GOT16_DS: | |
7742 | case elfcpp::R_PPC64_SECTOFF_DS: | |
7743 | case elfcpp::R_POWERPC_REL14: | |
7744 | case elfcpp::R_POWERPC_REL14_BRTAKEN: | |
7745 | case elfcpp::R_POWERPC_REL14_BRNTAKEN: | |
f4baf0d4 | 7746 | overflow = Reloc::CHECK_SIGNED; |
42cacb20 | 7747 | break; |
dd93cd0a | 7748 | } |
42cacb20 | 7749 | |
a680de9a PB |
7750 | Insn* iview = reinterpret_cast<Insn*>(view - 2 * big_endian); |
7751 | Insn insn = 0; | |
7752 | ||
b80eed39 AM |
7753 | if (overflow == Reloc::CHECK_LOW_INSN |
7754 | || overflow == Reloc::CHECK_HIGH_INSN) | |
7755 | { | |
a680de9a | 7756 | insn = elfcpp::Swap<32, big_endian>::readval(iview); |
b80eed39 | 7757 | |
a47622ac AM |
7758 | if ((insn & (0x3f << 26)) == 10u << 26 /* cmpli */) |
7759 | overflow = Reloc::CHECK_BITFIELD; | |
7760 | else if (overflow == Reloc::CHECK_LOW_INSN | |
7761 | ? ((insn & (0x3f << 26)) == 28u << 26 /* andi */ | |
7762 | || (insn & (0x3f << 26)) == 24u << 26 /* ori */ | |
7763 | || (insn & (0x3f << 26)) == 26u << 26 /* xori */) | |
7764 | : ((insn & (0x3f << 26)) == 29u << 26 /* andis */ | |
7765 | || (insn & (0x3f << 26)) == 25u << 26 /* oris */ | |
7766 | || (insn & (0x3f << 26)) == 27u << 26 /* xoris */)) | |
b80eed39 | 7767 | overflow = Reloc::CHECK_UNSIGNED; |
e30880c2 CC |
7768 | else |
7769 | overflow = Reloc::CHECK_SIGNED; | |
b80eed39 AM |
7770 | } |
7771 | ||
a680de9a | 7772 | bool maybe_dq_reloc = false; |
3ea0a085 | 7773 | typename Powerpc_relocate_functions<size, big_endian>::Status status |
f4baf0d4 | 7774 | = Powerpc_relocate_functions<size, big_endian>::STATUS_OK; |
dd93cd0a AM |
7775 | switch (r_type) |
7776 | { | |
7777 | case elfcpp::R_POWERPC_NONE: | |
7778 | case elfcpp::R_POWERPC_TLS: | |
7779 | case elfcpp::R_POWERPC_GNU_VTINHERIT: | |
7780 | case elfcpp::R_POWERPC_GNU_VTENTRY: | |
42cacb20 DE |
7781 | break; |
7782 | ||
7783 | case elfcpp::R_PPC64_ADDR64: | |
dd93cd0a | 7784 | case elfcpp::R_PPC64_REL64: |
cf43a2fe | 7785 | case elfcpp::R_PPC64_TOC: |
45965137 | 7786 | case elfcpp::R_PPC64_ADDR64_LOCAL: |
dd93cd0a AM |
7787 | Reloc::addr64(view, value); |
7788 | break; | |
7789 | ||
7790 | case elfcpp::R_POWERPC_TPREL: | |
7791 | case elfcpp::R_POWERPC_DTPREL: | |
7792 | if (size == 64) | |
7793 | Reloc::addr64(view, value); | |
7794 | else | |
3ea0a085 | 7795 | status = Reloc::addr32(view, value, overflow); |
dd93cd0a AM |
7796 | break; |
7797 | ||
7798 | case elfcpp::R_PPC64_UADDR64: | |
7799 | Reloc::addr64_u(view, value); | |
42cacb20 DE |
7800 | break; |
7801 | ||
7802 | case elfcpp::R_POWERPC_ADDR32: | |
3ea0a085 | 7803 | status = Reloc::addr32(view, value, overflow); |
dd93cd0a AM |
7804 | break; |
7805 | ||
acc276d8 | 7806 | case elfcpp::R_POWERPC_REL32: |
dd93cd0a | 7807 | case elfcpp::R_POWERPC_UADDR32: |
3ea0a085 | 7808 | status = Reloc::addr32_u(view, value, overflow); |
dd93cd0a AM |
7809 | break; |
7810 | ||
7811 | case elfcpp::R_POWERPC_ADDR24: | |
7812 | case elfcpp::R_POWERPC_REL24: | |
7813 | case elfcpp::R_PPC_PLTREL24: | |
7814 | case elfcpp::R_PPC_LOCAL24PC: | |
3ea0a085 | 7815 | status = Reloc::addr24(view, value, overflow); |
42cacb20 DE |
7816 | break; |
7817 | ||
dd93cd0a AM |
7818 | case elfcpp::R_POWERPC_GOT_DTPREL16: |
7819 | case elfcpp::R_POWERPC_GOT_DTPREL16_LO: | |
ec86f434 AM |
7820 | case elfcpp::R_POWERPC_GOT_TPREL16: |
7821 | case elfcpp::R_POWERPC_GOT_TPREL16_LO: | |
dd93cd0a AM |
7822 | if (size == 64) |
7823 | { | |
ec86f434 | 7824 | // On ppc64 these are all ds form |
a680de9a | 7825 | maybe_dq_reloc = true; |
dd93cd0a AM |
7826 | break; |
7827 | } | |
cf43a2fe | 7828 | case elfcpp::R_POWERPC_ADDR16: |
dd93cd0a | 7829 | case elfcpp::R_POWERPC_REL16: |
cf43a2fe | 7830 | case elfcpp::R_PPC64_TOC16: |
42cacb20 | 7831 | case elfcpp::R_POWERPC_GOT16: |
cf43a2fe | 7832 | case elfcpp::R_POWERPC_SECTOFF: |
dd93cd0a AM |
7833 | case elfcpp::R_POWERPC_TPREL16: |
7834 | case elfcpp::R_POWERPC_DTPREL16: | |
7835 | case elfcpp::R_POWERPC_GOT_TLSGD16: | |
7836 | case elfcpp::R_POWERPC_GOT_TLSLD16: | |
cf43a2fe | 7837 | case elfcpp::R_POWERPC_ADDR16_LO: |
dd93cd0a | 7838 | case elfcpp::R_POWERPC_REL16_LO: |
cf43a2fe | 7839 | case elfcpp::R_PPC64_TOC16_LO: |
42cacb20 | 7840 | case elfcpp::R_POWERPC_GOT16_LO: |
cf43a2fe | 7841 | case elfcpp::R_POWERPC_SECTOFF_LO: |
dd93cd0a AM |
7842 | case elfcpp::R_POWERPC_TPREL16_LO: |
7843 | case elfcpp::R_POWERPC_DTPREL16_LO: | |
7844 | case elfcpp::R_POWERPC_GOT_TLSGD16_LO: | |
7845 | case elfcpp::R_POWERPC_GOT_TLSLD16_LO: | |
a680de9a PB |
7846 | if (size == 64) |
7847 | status = Reloc::addr16(view, value, overflow); | |
7848 | else | |
7849 | maybe_dq_reloc = true; | |
dd93cd0a AM |
7850 | break; |
7851 | ||
7852 | case elfcpp::R_POWERPC_UADDR16: | |
3ea0a085 | 7853 | status = Reloc::addr16_u(view, value, overflow); |
42cacb20 DE |
7854 | break; |
7855 | ||
f9c6b907 AM |
7856 | case elfcpp::R_PPC64_ADDR16_HIGH: |
7857 | case elfcpp::R_PPC64_TPREL16_HIGH: | |
7858 | case elfcpp::R_PPC64_DTPREL16_HIGH: | |
7859 | if (size == 32) | |
7860 | // R_PPC_EMB_MRKREF, R_PPC_EMB_RELST_LO, R_PPC_EMB_RELST_HA | |
7861 | goto unsupp; | |
cf43a2fe | 7862 | case elfcpp::R_POWERPC_ADDR16_HI: |
dd93cd0a | 7863 | case elfcpp::R_POWERPC_REL16_HI: |
cf43a2fe | 7864 | case elfcpp::R_PPC64_TOC16_HI: |
42cacb20 | 7865 | case elfcpp::R_POWERPC_GOT16_HI: |
cf43a2fe | 7866 | case elfcpp::R_POWERPC_SECTOFF_HI: |
dd93cd0a AM |
7867 | case elfcpp::R_POWERPC_TPREL16_HI: |
7868 | case elfcpp::R_POWERPC_DTPREL16_HI: | |
7869 | case elfcpp::R_POWERPC_GOT_TLSGD16_HI: | |
7870 | case elfcpp::R_POWERPC_GOT_TLSLD16_HI: | |
7871 | case elfcpp::R_POWERPC_GOT_TPREL16_HI: | |
7872 | case elfcpp::R_POWERPC_GOT_DTPREL16_HI: | |
7873 | Reloc::addr16_hi(view, value); | |
42cacb20 DE |
7874 | break; |
7875 | ||
f9c6b907 AM |
7876 | case elfcpp::R_PPC64_ADDR16_HIGHA: |
7877 | case elfcpp::R_PPC64_TPREL16_HIGHA: | |
7878 | case elfcpp::R_PPC64_DTPREL16_HIGHA: | |
7879 | if (size == 32) | |
7880 | // R_PPC_EMB_RELSEC16, R_PPC_EMB_RELST_HI, R_PPC_EMB_BIT_FLD | |
7881 | goto unsupp; | |
cf43a2fe | 7882 | case elfcpp::R_POWERPC_ADDR16_HA: |
dd93cd0a | 7883 | case elfcpp::R_POWERPC_REL16_HA: |
cf43a2fe | 7884 | case elfcpp::R_PPC64_TOC16_HA: |
42cacb20 | 7885 | case elfcpp::R_POWERPC_GOT16_HA: |
cf43a2fe | 7886 | case elfcpp::R_POWERPC_SECTOFF_HA: |
dd93cd0a AM |
7887 | case elfcpp::R_POWERPC_TPREL16_HA: |
7888 | case elfcpp::R_POWERPC_DTPREL16_HA: | |
7889 | case elfcpp::R_POWERPC_GOT_TLSGD16_HA: | |
7890 | case elfcpp::R_POWERPC_GOT_TLSLD16_HA: | |
7891 | case elfcpp::R_POWERPC_GOT_TPREL16_HA: | |
7892 | case elfcpp::R_POWERPC_GOT_DTPREL16_HA: | |
7893 | Reloc::addr16_ha(view, value); | |
42cacb20 DE |
7894 | break; |
7895 | ||
a680de9a PB |
7896 | case elfcpp::R_POWERPC_REL16DX_HA: |
7897 | status = Reloc::addr16dx_ha(view, value, overflow); | |
7898 | break; | |
7899 | ||
dd93cd0a AM |
7900 | case elfcpp::R_PPC64_DTPREL16_HIGHER: |
7901 | if (size == 32) | |
7902 | // R_PPC_EMB_NADDR16_LO | |
7903 | goto unsupp; | |
7904 | case elfcpp::R_PPC64_ADDR16_HIGHER: | |
7905 | case elfcpp::R_PPC64_TPREL16_HIGHER: | |
7906 | Reloc::addr16_hi2(view, value); | |
42cacb20 DE |
7907 | break; |
7908 | ||
dd93cd0a AM |
7909 | case elfcpp::R_PPC64_DTPREL16_HIGHERA: |
7910 | if (size == 32) | |
7911 | // R_PPC_EMB_NADDR16_HI | |
7912 | goto unsupp; | |
7913 | case elfcpp::R_PPC64_ADDR16_HIGHERA: | |
7914 | case elfcpp::R_PPC64_TPREL16_HIGHERA: | |
7915 | Reloc::addr16_ha2(view, value); | |
42cacb20 DE |
7916 | break; |
7917 | ||
dd93cd0a AM |
7918 | case elfcpp::R_PPC64_DTPREL16_HIGHEST: |
7919 | if (size == 32) | |
7920 | // R_PPC_EMB_NADDR16_HA | |
7921 | goto unsupp; | |
7922 | case elfcpp::R_PPC64_ADDR16_HIGHEST: | |
7923 | case elfcpp::R_PPC64_TPREL16_HIGHEST: | |
7924 | Reloc::addr16_hi3(view, value); | |
42cacb20 DE |
7925 | break; |
7926 | ||
dd93cd0a AM |
7927 | case elfcpp::R_PPC64_DTPREL16_HIGHESTA: |
7928 | if (size == 32) | |
7929 | // R_PPC_EMB_SDAI16 | |
7930 | goto unsupp; | |
7931 | case elfcpp::R_PPC64_ADDR16_HIGHESTA: | |
7932 | case elfcpp::R_PPC64_TPREL16_HIGHESTA: | |
7933 | Reloc::addr16_ha3(view, value); | |
7934 | break; | |
7935 | ||
7936 | case elfcpp::R_PPC64_DTPREL16_DS: | |
7937 | case elfcpp::R_PPC64_DTPREL16_LO_DS: | |
7938 | if (size == 32) | |
7939 | // R_PPC_EMB_NADDR32, R_PPC_EMB_NADDR16 | |
7940 | goto unsupp; | |
7941 | case elfcpp::R_PPC64_TPREL16_DS: | |
7942 | case elfcpp::R_PPC64_TPREL16_LO_DS: | |
7943 | if (size == 32) | |
7944 | // R_PPC_TLSGD, R_PPC_TLSLD | |
7945 | break; | |
cf43a2fe AM |
7946 | case elfcpp::R_PPC64_ADDR16_DS: |
7947 | case elfcpp::R_PPC64_ADDR16_LO_DS: | |
42cacb20 DE |
7948 | case elfcpp::R_PPC64_TOC16_DS: |
7949 | case elfcpp::R_PPC64_TOC16_LO_DS: | |
cf43a2fe AM |
7950 | case elfcpp::R_PPC64_GOT16_DS: |
7951 | case elfcpp::R_PPC64_GOT16_LO_DS: | |
7952 | case elfcpp::R_PPC64_SECTOFF_DS: | |
7953 | case elfcpp::R_PPC64_SECTOFF_LO_DS: | |
a680de9a | 7954 | maybe_dq_reloc = true; |
dd93cd0a AM |
7955 | break; |
7956 | ||
7957 | case elfcpp::R_POWERPC_ADDR14: | |
7958 | case elfcpp::R_POWERPC_ADDR14_BRTAKEN: | |
7959 | case elfcpp::R_POWERPC_ADDR14_BRNTAKEN: | |
7960 | case elfcpp::R_POWERPC_REL14: | |
7961 | case elfcpp::R_POWERPC_REL14_BRTAKEN: | |
7962 | case elfcpp::R_POWERPC_REL14_BRNTAKEN: | |
3ea0a085 | 7963 | status = Reloc::addr14(view, value, overflow); |
42cacb20 DE |
7964 | break; |
7965 | ||
7966 | case elfcpp::R_POWERPC_COPY: | |
7967 | case elfcpp::R_POWERPC_GLOB_DAT: | |
7968 | case elfcpp::R_POWERPC_JMP_SLOT: | |
7969 | case elfcpp::R_POWERPC_RELATIVE: | |
42cacb20 | 7970 | case elfcpp::R_POWERPC_DTPMOD: |
dd93cd0a AM |
7971 | case elfcpp::R_PPC64_JMP_IREL: |
7972 | case elfcpp::R_POWERPC_IRELATIVE: | |
42cacb20 DE |
7973 | gold_error_at_location(relinfo, relnum, rela.get_r_offset(), |
7974 | _("unexpected reloc %u in object file"), | |
7975 | r_type); | |
7976 | break; | |
7977 | ||
dd93cd0a AM |
7978 | case elfcpp::R_PPC_EMB_SDA21: |
7979 | if (size == 32) | |
7980 | goto unsupp; | |
7981 | else | |
7982 | { | |
7983 | // R_PPC64_TOCSAVE. For the time being this can be ignored. | |
7984 | } | |
7985 | break; | |
7986 | ||
7987 | case elfcpp::R_PPC_EMB_SDA2I16: | |
7988 | case elfcpp::R_PPC_EMB_SDA2REL: | |
7989 | if (size == 32) | |
7990 | goto unsupp; | |
7991 | // R_PPC64_TLSGD, R_PPC64_TLSLD | |
6ce78956 AM |
7992 | break; |
7993 | ||
dd93cd0a AM |
7994 | case elfcpp::R_POWERPC_PLT32: |
7995 | case elfcpp::R_POWERPC_PLTREL32: | |
7996 | case elfcpp::R_POWERPC_PLT16_LO: | |
7997 | case elfcpp::R_POWERPC_PLT16_HI: | |
7998 | case elfcpp::R_POWERPC_PLT16_HA: | |
7999 | case elfcpp::R_PPC_SDAREL16: | |
8000 | case elfcpp::R_POWERPC_ADDR30: | |
8001 | case elfcpp::R_PPC64_PLT64: | |
8002 | case elfcpp::R_PPC64_PLTREL64: | |
8003 | case elfcpp::R_PPC64_PLTGOT16: | |
8004 | case elfcpp::R_PPC64_PLTGOT16_LO: | |
8005 | case elfcpp::R_PPC64_PLTGOT16_HI: | |
8006 | case elfcpp::R_PPC64_PLTGOT16_HA: | |
8007 | case elfcpp::R_PPC64_PLT16_LO_DS: | |
8008 | case elfcpp::R_PPC64_PLTGOT16_DS: | |
8009 | case elfcpp::R_PPC64_PLTGOT16_LO_DS: | |
dd93cd0a AM |
8010 | case elfcpp::R_PPC_EMB_RELSDA: |
8011 | case elfcpp::R_PPC_TOC16: | |
42cacb20 | 8012 | default: |
dd93cd0a | 8013 | unsupp: |
42cacb20 DE |
8014 | gold_error_at_location(relinfo, relnum, rela.get_r_offset(), |
8015 | _("unsupported reloc %u"), | |
8016 | r_type); | |
8017 | break; | |
8018 | } | |
a680de9a PB |
8019 | |
8020 | if (maybe_dq_reloc) | |
8021 | { | |
8022 | if (insn == 0) | |
8023 | insn = elfcpp::Swap<32, big_endian>::readval(iview); | |
8024 | ||
8025 | if ((insn & (0x3f << 26)) == 56u << 26 /* lq */ | |
8026 | || ((insn & (0x3f << 26)) == (61u << 26) /* lxv, stxv */ | |
8027 | && (insn & 3) == 1)) | |
8028 | status = Reloc::addr16_dq(view, value, overflow); | |
8029 | else if (size == 64 | |
8030 | || (insn & (0x3f << 26)) == 58u << 26 /* ld,ldu,lwa */ | |
8031 | || (insn & (0x3f << 26)) == 62u << 26 /* std,stdu,stq */ | |
8032 | || (insn & (0x3f << 26)) == 57u << 26 /* lfdp */ | |
8033 | || (insn & (0x3f << 26)) == 61u << 26 /* stfdp */) | |
8034 | status = Reloc::addr16_ds(view, value, overflow); | |
8035 | else | |
8036 | status = Reloc::addr16(view, value, overflow); | |
8037 | } | |
8038 | ||
0cfb0717 | 8039 | if (status != Powerpc_relocate_functions<size, big_endian>::STATUS_OK |
3ffaac20 AM |
8040 | && (has_stub_value |
8041 | || !(gsym != NULL | |
282c9750 | 8042 | && gsym->is_undefined() |
3ffaac20 | 8043 | && is_branch_reloc(r_type)))) |
0cfb0717 AM |
8044 | { |
8045 | gold_error_at_location(relinfo, relnum, rela.get_r_offset(), | |
8046 | _("relocation overflow")); | |
8047 | if (has_stub_value) | |
8048 | gold_info(_("try relinking with a smaller --stub-group-size")); | |
8049 | } | |
42cacb20 DE |
8050 | |
8051 | return true; | |
8052 | } | |
8053 | ||
42cacb20 DE |
8054 | // Relocate section data. |
8055 | ||
8056 | template<int size, bool big_endian> | |
8057 | void | |
8058 | Target_powerpc<size, big_endian>::relocate_section( | |
d83ce4e3 AM |
8059 | const Relocate_info<size, big_endian>* relinfo, |
8060 | unsigned int sh_type, | |
8061 | const unsigned char* prelocs, | |
8062 | size_t reloc_count, | |
8063 | Output_section* output_section, | |
8064 | bool needs_special_offset_handling, | |
8065 | unsigned char* view, | |
c9269dff | 8066 | Address address, |
d83ce4e3 AM |
8067 | section_size_type view_size, |
8068 | const Reloc_symbol_changes* reloc_symbol_changes) | |
42cacb20 DE |
8069 | { |
8070 | typedef Target_powerpc<size, big_endian> Powerpc; | |
8071 | typedef typename Target_powerpc<size, big_endian>::Relocate Powerpc_relocate; | |
168a4726 AM |
8072 | typedef typename Target_powerpc<size, big_endian>::Relocate_comdat_behavior |
8073 | Powerpc_comdat_behavior; | |
42cacb20 DE |
8074 | |
8075 | gold_assert(sh_type == elfcpp::SHT_RELA); | |
8076 | ||
8077 | gold::relocate_section<size, big_endian, Powerpc, elfcpp::SHT_RELA, | |
168a4726 | 8078 | Powerpc_relocate, Powerpc_comdat_behavior>( |
42cacb20 DE |
8079 | relinfo, |
8080 | this, | |
8081 | prelocs, | |
8082 | reloc_count, | |
8083 | output_section, | |
8084 | needs_special_offset_handling, | |
8085 | view, | |
8086 | address, | |
364c7fa5 ILT |
8087 | view_size, |
8088 | reloc_symbol_changes); | |
42cacb20 DE |
8089 | } |
8090 | ||
cf43a2fe | 8091 | class Powerpc_scan_relocatable_reloc |
42cacb20 | 8092 | { |
cf43a2fe AM |
8093 | public: |
8094 | // Return the strategy to use for a local symbol which is not a | |
8095 | // section symbol, given the relocation type. | |
8096 | inline Relocatable_relocs::Reloc_strategy | |
8097 | local_non_section_strategy(unsigned int r_type, Relobj*, unsigned int r_sym) | |
8098 | { | |
8099 | if (r_type == 0 && r_sym == 0) | |
8100 | return Relocatable_relocs::RELOC_DISCARD; | |
8101 | return Relocatable_relocs::RELOC_COPY; | |
8102 | } | |
8103 | ||
8104 | // Return the strategy to use for a local symbol which is a section | |
8105 | // symbol, given the relocation type. | |
8106 | inline Relocatable_relocs::Reloc_strategy | |
8107 | local_section_strategy(unsigned int, Relobj*) | |
8108 | { | |
8109 | return Relocatable_relocs::RELOC_ADJUST_FOR_SECTION_RELA; | |
8110 | } | |
8111 | ||
8112 | // Return the strategy to use for a global symbol, given the | |
8113 | // relocation type, the object, and the symbol index. | |
8114 | inline Relocatable_relocs::Reloc_strategy | |
8115 | global_strategy(unsigned int r_type, Relobj*, unsigned int) | |
8116 | { | |
8117 | if (r_type == elfcpp::R_PPC_PLTREL24) | |
8118 | return Relocatable_relocs::RELOC_SPECIAL; | |
8119 | return Relocatable_relocs::RELOC_COPY; | |
8120 | } | |
8121 | }; | |
42cacb20 DE |
8122 | |
8123 | // Scan the relocs during a relocatable link. | |
8124 | ||
8125 | template<int size, bool big_endian> | |
8126 | void | |
8127 | Target_powerpc<size, big_endian>::scan_relocatable_relocs( | |
d83ce4e3 AM |
8128 | Symbol_table* symtab, |
8129 | Layout* layout, | |
8130 | Sized_relobj_file<size, big_endian>* object, | |
8131 | unsigned int data_shndx, | |
8132 | unsigned int sh_type, | |
8133 | const unsigned char* prelocs, | |
8134 | size_t reloc_count, | |
8135 | Output_section* output_section, | |
8136 | bool needs_special_offset_handling, | |
8137 | size_t local_symbol_count, | |
8138 | const unsigned char* plocal_symbols, | |
8139 | Relocatable_relocs* rr) | |
42cacb20 DE |
8140 | { |
8141 | gold_assert(sh_type == elfcpp::SHT_RELA); | |
8142 | ||
42cacb20 | 8143 | gold::scan_relocatable_relocs<size, big_endian, elfcpp::SHT_RELA, |
d83ce4e3 | 8144 | Powerpc_scan_relocatable_reloc>( |
42cacb20 DE |
8145 | symtab, |
8146 | layout, | |
8147 | object, | |
8148 | data_shndx, | |
8149 | prelocs, | |
8150 | reloc_count, | |
8151 | output_section, | |
8152 | needs_special_offset_handling, | |
8153 | local_symbol_count, | |
8154 | plocal_symbols, | |
8155 | rr); | |
8156 | } | |
8157 | ||
7404fe1b | 8158 | // Emit relocations for a section. |
dd93cd0a AM |
8159 | // This is a modified version of the function by the same name in |
8160 | // target-reloc.h. Using relocate_special_relocatable for | |
8161 | // R_PPC_PLTREL24 would require duplication of the entire body of the | |
8162 | // loop, so we may as well duplicate the whole thing. | |
42cacb20 DE |
8163 | |
8164 | template<int size, bool big_endian> | |
8165 | void | |
7404fe1b | 8166 | Target_powerpc<size, big_endian>::relocate_relocs( |
42cacb20 DE |
8167 | const Relocate_info<size, big_endian>* relinfo, |
8168 | unsigned int sh_type, | |
8169 | const unsigned char* prelocs, | |
8170 | size_t reloc_count, | |
8171 | Output_section* output_section, | |
62fe925a | 8172 | typename elfcpp::Elf_types<size>::Elf_Off offset_in_output_section, |
42cacb20 | 8173 | const Relocatable_relocs* rr, |
cf43a2fe | 8174 | unsigned char*, |
dd93cd0a | 8175 | Address view_address, |
cf43a2fe | 8176 | section_size_type, |
42cacb20 DE |
8177 | unsigned char* reloc_view, |
8178 | section_size_type reloc_view_size) | |
8179 | { | |
8180 | gold_assert(sh_type == elfcpp::SHT_RELA); | |
8181 | ||
cf43a2fe AM |
8182 | typedef typename Reloc_types<elfcpp::SHT_RELA, size, big_endian>::Reloc |
8183 | Reltype; | |
8184 | typedef typename Reloc_types<elfcpp::SHT_RELA, size, big_endian>::Reloc_write | |
8185 | Reltype_write; | |
8186 | const int reloc_size | |
8187 | = Reloc_types<elfcpp::SHT_RELA, size, big_endian>::reloc_size; | |
cf43a2fe AM |
8188 | |
8189 | Powerpc_relobj<size, big_endian>* const object | |
8190 | = static_cast<Powerpc_relobj<size, big_endian>*>(relinfo->object); | |
8191 | const unsigned int local_count = object->local_symbol_count(); | |
8192 | unsigned int got2_shndx = object->got2_shndx(); | |
c9269dff | 8193 | Address got2_addend = 0; |
cf43a2fe | 8194 | if (got2_shndx != 0) |
c9269dff AM |
8195 | { |
8196 | got2_addend = object->get_output_section_offset(got2_shndx); | |
8197 | gold_assert(got2_addend != invalid_address); | |
8198 | } | |
cf43a2fe AM |
8199 | |
8200 | unsigned char* pwrite = reloc_view; | |
7404fe1b | 8201 | bool zap_next = false; |
cf43a2fe AM |
8202 | for (size_t i = 0; i < reloc_count; ++i, prelocs += reloc_size) |
8203 | { | |
8204 | Relocatable_relocs::Reloc_strategy strategy = rr->strategy(i); | |
8205 | if (strategy == Relocatable_relocs::RELOC_DISCARD) | |
8206 | continue; | |
8207 | ||
8208 | Reltype reloc(prelocs); | |
8209 | Reltype_write reloc_write(pwrite); | |
8210 | ||
7404fe1b | 8211 | Address offset = reloc.get_r_offset(); |
cf43a2fe | 8212 | typename elfcpp::Elf_types<size>::Elf_WXword r_info = reloc.get_r_info(); |
7404fe1b AM |
8213 | unsigned int r_sym = elfcpp::elf_r_sym<size>(r_info); |
8214 | unsigned int r_type = elfcpp::elf_r_type<size>(r_info); | |
8215 | const unsigned int orig_r_sym = r_sym; | |
8216 | typename elfcpp::Elf_types<size>::Elf_Swxword addend | |
8217 | = reloc.get_r_addend(); | |
8218 | const Symbol* gsym = NULL; | |
8219 | ||
8220 | if (zap_next) | |
8221 | { | |
8222 | // We could arrange to discard these and other relocs for | |
8223 | // tls optimised sequences in the strategy methods, but for | |
8224 | // now do as BFD ld does. | |
8225 | r_type = elfcpp::R_POWERPC_NONE; | |
8226 | zap_next = false; | |
8227 | } | |
cf43a2fe AM |
8228 | |
8229 | // Get the new symbol index. | |
9215b98b | 8230 | Output_section* os = NULL; |
cf43a2fe AM |
8231 | if (r_sym < local_count) |
8232 | { | |
8233 | switch (strategy) | |
8234 | { | |
8235 | case Relocatable_relocs::RELOC_COPY: | |
8236 | case Relocatable_relocs::RELOC_SPECIAL: | |
7404fe1b | 8237 | if (r_sym != 0) |
dd93cd0a | 8238 | { |
7404fe1b AM |
8239 | r_sym = object->symtab_index(r_sym); |
8240 | gold_assert(r_sym != -1U); | |
dd93cd0a | 8241 | } |
cf43a2fe AM |
8242 | break; |
8243 | ||
8244 | case Relocatable_relocs::RELOC_ADJUST_FOR_SECTION_RELA: | |
8245 | { | |
8246 | // We are adjusting a section symbol. We need to find | |
8247 | // the symbol table index of the section symbol for | |
8248 | // the output section corresponding to input section | |
8249 | // in which this symbol is defined. | |
8250 | gold_assert(r_sym < local_count); | |
8251 | bool is_ordinary; | |
8252 | unsigned int shndx = | |
8253 | object->local_symbol_input_shndx(r_sym, &is_ordinary); | |
8254 | gold_assert(is_ordinary); | |
9215b98b | 8255 | os = object->output_section(shndx); |
cf43a2fe AM |
8256 | gold_assert(os != NULL); |
8257 | gold_assert(os->needs_symtab_index()); | |
7404fe1b | 8258 | r_sym = os->symtab_index(); |
cf43a2fe AM |
8259 | } |
8260 | break; | |
8261 | ||
8262 | default: | |
8263 | gold_unreachable(); | |
8264 | } | |
8265 | } | |
8266 | else | |
8267 | { | |
7404fe1b | 8268 | gsym = object->global_symbol(r_sym); |
cf43a2fe AM |
8269 | gold_assert(gsym != NULL); |
8270 | if (gsym->is_forwarder()) | |
8271 | gsym = relinfo->symtab->resolve_forwards(gsym); | |
8272 | ||
8273 | gold_assert(gsym->has_symtab_index()); | |
7404fe1b | 8274 | r_sym = gsym->symtab_index(); |
cf43a2fe AM |
8275 | } |
8276 | ||
8277 | // Get the new offset--the location in the output section where | |
8278 | // this relocation should be applied. | |
cf43a2fe | 8279 | if (static_cast<Address>(offset_in_output_section) != invalid_address) |
7404fe1b | 8280 | offset += offset_in_output_section; |
cf43a2fe AM |
8281 | else |
8282 | { | |
c9269dff AM |
8283 | section_offset_type sot_offset = |
8284 | convert_types<section_offset_type, Address>(offset); | |
cf43a2fe | 8285 | section_offset_type new_sot_offset = |
c9269dff AM |
8286 | output_section->output_offset(object, relinfo->data_shndx, |
8287 | sot_offset); | |
cf43a2fe | 8288 | gold_assert(new_sot_offset != -1); |
7404fe1b | 8289 | offset = new_sot_offset; |
cf43a2fe AM |
8290 | } |
8291 | ||
dd93cd0a AM |
8292 | // In an object file, r_offset is an offset within the section. |
8293 | // In an executable or dynamic object, generated by | |
8294 | // --emit-relocs, r_offset is an absolute address. | |
7404fe1b | 8295 | if (!parameters->options().relocatable()) |
dd93cd0a | 8296 | { |
7404fe1b | 8297 | offset += view_address; |
dd93cd0a | 8298 | if (static_cast<Address>(offset_in_output_section) != invalid_address) |
7404fe1b | 8299 | offset -= offset_in_output_section; |
dd93cd0a AM |
8300 | } |
8301 | ||
cf43a2fe | 8302 | // Handle the reloc addend based on the strategy. |
cf43a2fe AM |
8303 | if (strategy == Relocatable_relocs::RELOC_COPY) |
8304 | ; | |
8305 | else if (strategy == Relocatable_relocs::RELOC_ADJUST_FOR_SECTION_RELA) | |
8306 | { | |
7404fe1b | 8307 | const Symbol_value<size>* psymval = object->local_symbol(orig_r_sym); |
9215b98b AM |
8308 | gold_assert(os != NULL); |
8309 | addend = psymval->value(object, addend) - os->address(); | |
cf43a2fe AM |
8310 | } |
8311 | else if (strategy == Relocatable_relocs::RELOC_SPECIAL) | |
8312 | { | |
8313 | if (addend >= 32768) | |
8314 | addend += got2_addend; | |
8315 | } | |
8316 | else | |
8317 | gold_unreachable(); | |
8318 | ||
7404fe1b AM |
8319 | if (!parameters->options().relocatable()) |
8320 | { | |
8321 | if (r_type == elfcpp::R_POWERPC_GOT_TLSGD16 | |
8322 | || r_type == elfcpp::R_POWERPC_GOT_TLSGD16_LO | |
8323 | || r_type == elfcpp::R_POWERPC_GOT_TLSGD16_HI | |
8324 | || r_type == elfcpp::R_POWERPC_GOT_TLSGD16_HA) | |
8325 | { | |
8326 | // First instruction of a global dynamic sequence, | |
8327 | // arg setup insn. | |
8328 | const bool final = gsym == NULL || gsym->final_value_is_known(); | |
8329 | switch (this->optimize_tls_gd(final)) | |
8330 | { | |
8331 | case tls::TLSOPT_TO_IE: | |
8332 | r_type += (elfcpp::R_POWERPC_GOT_TPREL16 | |
8333 | - elfcpp::R_POWERPC_GOT_TLSGD16); | |
8334 | break; | |
8335 | case tls::TLSOPT_TO_LE: | |
8336 | if (r_type == elfcpp::R_POWERPC_GOT_TLSGD16 | |
8337 | || r_type == elfcpp::R_POWERPC_GOT_TLSGD16_LO) | |
8338 | r_type = elfcpp::R_POWERPC_TPREL16_HA; | |
8339 | else | |
8340 | { | |
8341 | r_type = elfcpp::R_POWERPC_NONE; | |
8342 | offset -= 2 * big_endian; | |
8343 | } | |
8344 | break; | |
8345 | default: | |
8346 | break; | |
8347 | } | |
8348 | } | |
8349 | else if (r_type == elfcpp::R_POWERPC_GOT_TLSLD16 | |
8350 | || r_type == elfcpp::R_POWERPC_GOT_TLSLD16_LO | |
8351 | || r_type == elfcpp::R_POWERPC_GOT_TLSLD16_HI | |
8352 | || r_type == elfcpp::R_POWERPC_GOT_TLSLD16_HA) | |
8353 | { | |
8354 | // First instruction of a local dynamic sequence, | |
8355 | // arg setup insn. | |
8356 | if (this->optimize_tls_ld() == tls::TLSOPT_TO_LE) | |
8357 | { | |
8358 | if (r_type == elfcpp::R_POWERPC_GOT_TLSLD16 | |
8359 | || r_type == elfcpp::R_POWERPC_GOT_TLSLD16_LO) | |
8360 | { | |
8361 | r_type = elfcpp::R_POWERPC_TPREL16_HA; | |
8362 | const Output_section* os = relinfo->layout->tls_segment() | |
8363 | ->first_section(); | |
8364 | gold_assert(os != NULL); | |
8365 | gold_assert(os->needs_symtab_index()); | |
8366 | r_sym = os->symtab_index(); | |
8367 | addend = dtp_offset; | |
8368 | } | |
8369 | else | |
8370 | { | |
8371 | r_type = elfcpp::R_POWERPC_NONE; | |
8372 | offset -= 2 * big_endian; | |
8373 | } | |
8374 | } | |
8375 | } | |
8376 | else if (r_type == elfcpp::R_POWERPC_GOT_TPREL16 | |
8377 | || r_type == elfcpp::R_POWERPC_GOT_TPREL16_LO | |
8378 | || r_type == elfcpp::R_POWERPC_GOT_TPREL16_HI | |
8379 | || r_type == elfcpp::R_POWERPC_GOT_TPREL16_HA) | |
8380 | { | |
8381 | // First instruction of initial exec sequence. | |
8382 | const bool final = gsym == NULL || gsym->final_value_is_known(); | |
8383 | if (this->optimize_tls_ie(final) == tls::TLSOPT_TO_LE) | |
8384 | { | |
8385 | if (r_type == elfcpp::R_POWERPC_GOT_TPREL16 | |
8386 | || r_type == elfcpp::R_POWERPC_GOT_TPREL16_LO) | |
8387 | r_type = elfcpp::R_POWERPC_TPREL16_HA; | |
8388 | else | |
8389 | { | |
8390 | r_type = elfcpp::R_POWERPC_NONE; | |
8391 | offset -= 2 * big_endian; | |
8392 | } | |
8393 | } | |
8394 | } | |
8395 | else if ((size == 64 && r_type == elfcpp::R_PPC64_TLSGD) | |
8396 | || (size == 32 && r_type == elfcpp::R_PPC_TLSGD)) | |
8397 | { | |
8398 | // Second instruction of a global dynamic sequence, | |
8399 | // the __tls_get_addr call | |
8400 | const bool final = gsym == NULL || gsym->final_value_is_known(); | |
8401 | switch (this->optimize_tls_gd(final)) | |
8402 | { | |
8403 | case tls::TLSOPT_TO_IE: | |
8404 | r_type = elfcpp::R_POWERPC_NONE; | |
8405 | zap_next = true; | |
8406 | break; | |
8407 | case tls::TLSOPT_TO_LE: | |
8408 | r_type = elfcpp::R_POWERPC_TPREL16_LO; | |
8409 | offset += 2 * big_endian; | |
8410 | zap_next = true; | |
8411 | break; | |
8412 | default: | |
8413 | break; | |
8414 | } | |
8415 | } | |
8416 | else if ((size == 64 && r_type == elfcpp::R_PPC64_TLSLD) | |
8417 | || (size == 32 && r_type == elfcpp::R_PPC_TLSLD)) | |
8418 | { | |
8419 | // Second instruction of a local dynamic sequence, | |
8420 | // the __tls_get_addr call | |
8421 | if (this->optimize_tls_ld() == tls::TLSOPT_TO_LE) | |
8422 | { | |
8423 | const Output_section* os = relinfo->layout->tls_segment() | |
8424 | ->first_section(); | |
8425 | gold_assert(os != NULL); | |
8426 | gold_assert(os->needs_symtab_index()); | |
8427 | r_sym = os->symtab_index(); | |
8428 | addend = dtp_offset; | |
8429 | r_type = elfcpp::R_POWERPC_TPREL16_LO; | |
8430 | offset += 2 * big_endian; | |
8431 | zap_next = true; | |
8432 | } | |
8433 | } | |
8434 | else if (r_type == elfcpp::R_POWERPC_TLS) | |
8435 | { | |
8436 | // Second instruction of an initial exec sequence | |
8437 | const bool final = gsym == NULL || gsym->final_value_is_known(); | |
8438 | if (this->optimize_tls_ie(final) == tls::TLSOPT_TO_LE) | |
8439 | { | |
8440 | r_type = elfcpp::R_POWERPC_TPREL16_LO; | |
8441 | offset += 2 * big_endian; | |
8442 | } | |
8443 | } | |
8444 | } | |
8445 | ||
8446 | reloc_write.put_r_offset(offset); | |
8447 | reloc_write.put_r_info(elfcpp::elf_r_info<size>(r_sym, r_type)); | |
8448 | reloc_write.put_r_addend(addend); | |
cf43a2fe AM |
8449 | |
8450 | pwrite += reloc_size; | |
8451 | } | |
8452 | ||
8453 | gold_assert(static_cast<section_size_type>(pwrite - reloc_view) | |
8454 | == reloc_view_size); | |
42cacb20 DE |
8455 | } |
8456 | ||
ec661b9d | 8457 | // Return the value to use for a dynamic symbol which requires special |
42cacb20 DE |
8458 | // treatment. This is how we support equality comparisons of function |
8459 | // pointers across shared library boundaries, as described in the | |
8460 | // processor specific ABI supplement. | |
8461 | ||
8462 | template<int size, bool big_endian> | |
8463 | uint64_t | |
8464 | Target_powerpc<size, big_endian>::do_dynsym_value(const Symbol* gsym) const | |
8465 | { | |
cf43a2fe AM |
8466 | if (size == 32) |
8467 | { | |
8468 | gold_assert(gsym->is_from_dynobj() && gsym->has_plt_offset()); | |
ec661b9d AM |
8469 | for (typename Stub_tables::const_iterator p = this->stub_tables_.begin(); |
8470 | p != this->stub_tables_.end(); | |
8471 | ++p) | |
8472 | { | |
8473 | Address off = (*p)->find_plt_call_entry(gsym); | |
8474 | if (off != invalid_address) | |
8475 | return (*p)->stub_address() + off; | |
8476 | } | |
c9824451 | 8477 | } |
9055360d AM |
8478 | else if (this->abiversion() >= 2) |
8479 | { | |
faa2211d AM |
8480 | Address off = this->glink_section()->find_global_entry(gsym); |
8481 | if (off != invalid_address) | |
9055360d AM |
8482 | return this->glink_section()->global_entry_address() + off; |
8483 | } | |
ec661b9d | 8484 | gold_unreachable(); |
c9824451 AM |
8485 | } |
8486 | ||
8487 | // Return the PLT address to use for a local symbol. | |
8488 | template<int size, bool big_endian> | |
8489 | uint64_t | |
8490 | Target_powerpc<size, big_endian>::do_plt_address_for_local( | |
8491 | const Relobj* object, | |
8492 | unsigned int symndx) const | |
8493 | { | |
8494 | if (size == 32) | |
8495 | { | |
8496 | const Sized_relobj<size, big_endian>* relobj | |
8497 | = static_cast<const Sized_relobj<size, big_endian>*>(object); | |
ec661b9d AM |
8498 | for (typename Stub_tables::const_iterator p = this->stub_tables_.begin(); |
8499 | p != this->stub_tables_.end(); | |
8500 | ++p) | |
8501 | { | |
8502 | Address off = (*p)->find_plt_call_entry(relobj->sized_relobj(), | |
8503 | symndx); | |
8504 | if (off != invalid_address) | |
8505 | return (*p)->stub_address() + off; | |
8506 | } | |
c9824451 | 8507 | } |
ec661b9d | 8508 | gold_unreachable(); |
c9824451 AM |
8509 | } |
8510 | ||
8511 | // Return the PLT address to use for a global symbol. | |
8512 | template<int size, bool big_endian> | |
8513 | uint64_t | |
8514 | Target_powerpc<size, big_endian>::do_plt_address_for_global( | |
8515 | const Symbol* gsym) const | |
8516 | { | |
8517 | if (size == 32) | |
8518 | { | |
ec661b9d AM |
8519 | for (typename Stub_tables::const_iterator p = this->stub_tables_.begin(); |
8520 | p != this->stub_tables_.end(); | |
8521 | ++p) | |
8522 | { | |
8523 | Address off = (*p)->find_plt_call_entry(gsym); | |
8524 | if (off != invalid_address) | |
8525 | return (*p)->stub_address() + off; | |
8526 | } | |
cf43a2fe | 8527 | } |
9055360d AM |
8528 | else if (this->abiversion() >= 2) |
8529 | { | |
faa2211d AM |
8530 | Address off = this->glink_section()->find_global_entry(gsym); |
8531 | if (off != invalid_address) | |
9055360d AM |
8532 | return this->glink_section()->global_entry_address() + off; |
8533 | } | |
ec661b9d | 8534 | gold_unreachable(); |
42cacb20 DE |
8535 | } |
8536 | ||
bd73a62d AM |
8537 | // Return the offset to use for the GOT_INDX'th got entry which is |
8538 | // for a local tls symbol specified by OBJECT, SYMNDX. | |
8539 | template<int size, bool big_endian> | |
8540 | int64_t | |
8541 | Target_powerpc<size, big_endian>::do_tls_offset_for_local( | |
8542 | const Relobj* object, | |
8543 | unsigned int symndx, | |
8544 | unsigned int got_indx) const | |
8545 | { | |
8546 | const Powerpc_relobj<size, big_endian>* ppc_object | |
8547 | = static_cast<const Powerpc_relobj<size, big_endian>*>(object); | |
8548 | if (ppc_object->local_symbol(symndx)->is_tls_symbol()) | |
8549 | { | |
8550 | for (Got_type got_type = GOT_TYPE_TLSGD; | |
8551 | got_type <= GOT_TYPE_TPREL; | |
8552 | got_type = Got_type(got_type + 1)) | |
8553 | if (ppc_object->local_has_got_offset(symndx, got_type)) | |
8554 | { | |
8555 | unsigned int off = ppc_object->local_got_offset(symndx, got_type); | |
8556 | if (got_type == GOT_TYPE_TLSGD) | |
8557 | off += size / 8; | |
8558 | if (off == got_indx * (size / 8)) | |
8559 | { | |
8560 | if (got_type == GOT_TYPE_TPREL) | |
8561 | return -tp_offset; | |
8562 | else | |
8563 | return -dtp_offset; | |
8564 | } | |
8565 | } | |
8566 | } | |
8567 | gold_unreachable(); | |
8568 | } | |
8569 | ||
8570 | // Return the offset to use for the GOT_INDX'th got entry which is | |
8571 | // for global tls symbol GSYM. | |
8572 | template<int size, bool big_endian> | |
8573 | int64_t | |
8574 | Target_powerpc<size, big_endian>::do_tls_offset_for_global( | |
8575 | Symbol* gsym, | |
8576 | unsigned int got_indx) const | |
8577 | { | |
8578 | if (gsym->type() == elfcpp::STT_TLS) | |
8579 | { | |
8580 | for (Got_type got_type = GOT_TYPE_TLSGD; | |
8581 | got_type <= GOT_TYPE_TPREL; | |
8582 | got_type = Got_type(got_type + 1)) | |
8583 | if (gsym->has_got_offset(got_type)) | |
8584 | { | |
8585 | unsigned int off = gsym->got_offset(got_type); | |
8586 | if (got_type == GOT_TYPE_TLSGD) | |
8587 | off += size / 8; | |
8588 | if (off == got_indx * (size / 8)) | |
8589 | { | |
8590 | if (got_type == GOT_TYPE_TPREL) | |
8591 | return -tp_offset; | |
8592 | else | |
8593 | return -dtp_offset; | |
8594 | } | |
8595 | } | |
8596 | } | |
8597 | gold_unreachable(); | |
8598 | } | |
8599 | ||
42cacb20 DE |
8600 | // The selector for powerpc object files. |
8601 | ||
8602 | template<int size, bool big_endian> | |
8603 | class Target_selector_powerpc : public Target_selector | |
8604 | { | |
8605 | public: | |
8606 | Target_selector_powerpc() | |
edc27beb AM |
8607 | : Target_selector(size == 64 ? elfcpp::EM_PPC64 : elfcpp::EM_PPC, |
8608 | size, big_endian, | |
03ef7571 ILT |
8609 | (size == 64 |
8610 | ? (big_endian ? "elf64-powerpc" : "elf64-powerpcle") | |
8611 | : (big_endian ? "elf32-powerpc" : "elf32-powerpcle")), | |
8612 | (size == 64 | |
8613 | ? (big_endian ? "elf64ppc" : "elf64lppc") | |
8614 | : (big_endian ? "elf32ppc" : "elf32lppc"))) | |
42cacb20 DE |
8615 | { } |
8616 | ||
2e702c99 RM |
8617 | virtual Target* |
8618 | do_instantiate_target() | |
7f055c20 | 8619 | { return new Target_powerpc<size, big_endian>(); } |
42cacb20 DE |
8620 | }; |
8621 | ||
8622 | Target_selector_powerpc<32, true> target_selector_ppc32; | |
8623 | Target_selector_powerpc<32, false> target_selector_ppc32le; | |
8624 | Target_selector_powerpc<64, true> target_selector_ppc64; | |
8625 | Target_selector_powerpc<64, false> target_selector_ppc64le; | |
8626 | ||
decdd3bc AM |
8627 | // Instantiate these constants for -O0 |
8628 | template<int size, bool big_endian> | |
8629 | const int Output_data_glink<size, big_endian>::pltresolve_size; | |
8630 | template<int size, bool big_endian> | |
9055360d AM |
8631 | const typename Output_data_glink<size, big_endian>::Address |
8632 | Output_data_glink<size, big_endian>::invalid_address; | |
8633 | template<int size, bool big_endian> | |
decdd3bc AM |
8634 | const typename Stub_table<size, big_endian>::Address |
8635 | Stub_table<size, big_endian>::invalid_address; | |
8636 | template<int size, bool big_endian> | |
8637 | const typename Target_powerpc<size, big_endian>::Address | |
8638 | Target_powerpc<size, big_endian>::invalid_address; | |
8639 | ||
42cacb20 | 8640 | } // End anonymous namespace. |