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42cacb20 DE |
1 | // powerpc.cc -- powerpc target support for gold. |
2 | ||
2e702c99 | 3 | // Copyright 2008, 2009, 2010, 2011, 2012 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 | ||
ec661b9d | 26 | #include <algorithm> |
42cacb20 DE |
27 | #include "elfcpp.h" |
28 | #include "parameters.h" | |
29 | #include "reloc.h" | |
30 | #include "powerpc.h" | |
31 | #include "object.h" | |
32 | #include "symtab.h" | |
33 | #include "layout.h" | |
34 | #include "output.h" | |
35 | #include "copy-relocs.h" | |
36 | #include "target.h" | |
37 | #include "target-reloc.h" | |
38 | #include "target-select.h" | |
39 | #include "tls.h" | |
40 | #include "errors.h" | |
f345227a | 41 | #include "gc.h" |
42cacb20 DE |
42 | |
43 | namespace | |
44 | { | |
45 | ||
46 | using namespace gold; | |
47 | ||
48 | template<int size, bool big_endian> | |
49 | class Output_data_plt_powerpc; | |
50 | ||
ec661b9d AM |
51 | template<int size, bool big_endian> |
52 | class Output_data_brlt_powerpc; | |
53 | ||
cf43a2fe AM |
54 | template<int size, bool big_endian> |
55 | class Output_data_got_powerpc; | |
56 | ||
57 | template<int size, bool big_endian> | |
58 | class Output_data_glink; | |
59 | ||
ec661b9d AM |
60 | template<int size, bool big_endian> |
61 | class Stub_table; | |
62 | ||
cf43a2fe AM |
63 | template<int size, bool big_endian> |
64 | class Powerpc_relobj : public Sized_relobj_file<size, big_endian> | |
65 | { | |
66 | public: | |
dd93cd0a | 67 | typedef typename elfcpp::Elf_types<size>::Elf_Addr Address; |
e81fea4d AM |
68 | typedef Unordered_set<Section_id, Section_id_hash> Section_refs; |
69 | typedef Unordered_map<Address, Section_refs> Access_from; | |
c9269dff | 70 | |
cf43a2fe AM |
71 | Powerpc_relobj(const std::string& name, Input_file* input_file, off_t offset, |
72 | const typename elfcpp::Ehdr<size, big_endian>& ehdr) | |
73 | : Sized_relobj_file<size, big_endian>(name, input_file, offset, ehdr), | |
d8f5a274 | 74 | special_(0), has_small_toc_reloc_(false), opd_valid_(false), |
906b9150 | 75 | opd_ent_(), access_from_map_(), has14_(), stub_table_() |
cf43a2fe AM |
76 | { } |
77 | ||
78 | ~Powerpc_relobj() | |
79 | { } | |
80 | ||
c9269dff | 81 | // The .got2 section shndx. |
cf43a2fe AM |
82 | unsigned int |
83 | got2_shndx() const | |
84 | { | |
85 | if (size == 32) | |
c9269dff | 86 | return this->special_; |
cf43a2fe AM |
87 | else |
88 | return 0; | |
89 | } | |
90 | ||
c9269dff AM |
91 | // The .opd section shndx. |
92 | unsigned int | |
93 | opd_shndx() const | |
94 | { | |
95 | if (size == 32) | |
96 | return 0; | |
97 | else | |
98 | return this->special_; | |
99 | } | |
100 | ||
101 | // Init OPD entry arrays. | |
102 | void | |
103 | init_opd(size_t opd_size) | |
104 | { | |
105 | size_t count = this->opd_ent_ndx(opd_size); | |
bfdfa4cd | 106 | this->opd_ent_.resize(count); |
c9269dff AM |
107 | } |
108 | ||
109 | // Return section and offset of function entry for .opd + R_OFF. | |
e81fea4d AM |
110 | unsigned int |
111 | get_opd_ent(Address r_off, Address* value = NULL) const | |
c9269dff AM |
112 | { |
113 | size_t ndx = this->opd_ent_ndx(r_off); | |
bfdfa4cd AM |
114 | gold_assert(ndx < this->opd_ent_.size()); |
115 | gold_assert(this->opd_ent_[ndx].shndx != 0); | |
e81fea4d | 116 | if (value != NULL) |
bfdfa4cd AM |
117 | *value = this->opd_ent_[ndx].off; |
118 | return this->opd_ent_[ndx].shndx; | |
c9269dff AM |
119 | } |
120 | ||
121 | // Set section and offset of function entry for .opd + R_OFF. | |
122 | void | |
dd93cd0a | 123 | set_opd_ent(Address r_off, unsigned int shndx, Address value) |
c9269dff AM |
124 | { |
125 | size_t ndx = this->opd_ent_ndx(r_off); | |
bfdfa4cd AM |
126 | gold_assert(ndx < this->opd_ent_.size()); |
127 | this->opd_ent_[ndx].shndx = shndx; | |
128 | this->opd_ent_[ndx].off = value; | |
129 | } | |
130 | ||
131 | // Return discard flag for .opd + R_OFF. | |
132 | bool | |
133 | get_opd_discard(Address r_off) const | |
134 | { | |
135 | size_t ndx = this->opd_ent_ndx(r_off); | |
136 | gold_assert(ndx < this->opd_ent_.size()); | |
137 | return this->opd_ent_[ndx].discard; | |
138 | } | |
139 | ||
140 | // Set discard flag for .opd + R_OFF. | |
141 | void | |
142 | set_opd_discard(Address r_off) | |
143 | { | |
144 | size_t ndx = this->opd_ent_ndx(r_off); | |
145 | gold_assert(ndx < this->opd_ent_.size()); | |
146 | this->opd_ent_[ndx].discard = true; | |
c9269dff AM |
147 | } |
148 | ||
e81fea4d AM |
149 | Access_from* |
150 | access_from_map() | |
151 | { return &this->access_from_map_; } | |
152 | ||
153 | // Add a reference from SRC_OBJ, SRC_INDX to this object's .opd | |
154 | // section at DST_OFF. | |
155 | void | |
156 | add_reference(Object* src_obj, | |
157 | unsigned int src_indx, | |
158 | typename elfcpp::Elf_types<size>::Elf_Addr dst_off) | |
159 | { | |
160 | Section_id src_id(src_obj, src_indx); | |
161 | this->access_from_map_[dst_off].insert(src_id); | |
162 | } | |
163 | ||
c6de8ed4 AM |
164 | // Add a reference to the code section specified by the .opd entry |
165 | // at DST_OFF | |
166 | void | |
167 | add_gc_mark(typename elfcpp::Elf_types<size>::Elf_Addr dst_off) | |
168 | { | |
169 | size_t ndx = this->opd_ent_ndx(dst_off); | |
170 | if (ndx >= this->opd_ent_.size()) | |
171 | this->opd_ent_.resize(ndx + 1); | |
172 | this->opd_ent_[ndx].gc_mark = true; | |
173 | } | |
174 | ||
175 | void | |
176 | process_gc_mark(Symbol_table* symtab) | |
177 | { | |
178 | for (size_t i = 0; i < this->opd_ent_.size(); i++) | |
179 | if (this->opd_ent_[i].gc_mark) | |
180 | { | |
181 | unsigned int shndx = this->opd_ent_[i].shndx; | |
182 | symtab->gc()->worklist().push(Section_id(this, shndx)); | |
183 | } | |
184 | } | |
185 | ||
e81fea4d AM |
186 | bool |
187 | opd_valid() const | |
188 | { return this->opd_valid_; } | |
189 | ||
190 | void | |
191 | set_opd_valid() | |
192 | { this->opd_valid_ = true; } | |
193 | ||
c9269dff AM |
194 | // Examine .rela.opd to build info about function entry points. |
195 | void | |
196 | scan_opd_relocs(size_t reloc_count, | |
197 | const unsigned char* prelocs, | |
198 | const unsigned char* plocal_syms); | |
199 | ||
26a4e9cb AM |
200 | // Perform the Sized_relobj_file method, then set up opd info from |
201 | // .opd relocs. | |
c9269dff AM |
202 | void |
203 | do_read_relocs(Read_relocs_data*); | |
204 | ||
cf43a2fe AM |
205 | bool |
206 | do_find_special_sections(Read_symbols_data* sd); | |
207 | ||
ec4dbad3 AM |
208 | // Adjust this local symbol value. Return false if the symbol |
209 | // should be discarded from the output file. | |
210 | bool | |
211 | do_adjust_local_symbol(Symbol_value<size>* lv) const | |
212 | { | |
213 | if (size == 64 && this->opd_shndx() != 0) | |
214 | { | |
215 | bool is_ordinary; | |
216 | if (lv->input_shndx(&is_ordinary) != this->opd_shndx()) | |
217 | return true; | |
218 | if (this->get_opd_discard(lv->input_value())) | |
219 | return false; | |
220 | } | |
221 | return true; | |
222 | } | |
223 | ||
dd93cd0a AM |
224 | // Return offset in output GOT section that this object will use |
225 | // as a TOC pointer. Won't be just a constant with multi-toc support. | |
226 | Address | |
227 | toc_base_offset() const | |
228 | { return 0x8000; } | |
229 | ||
d8f5a274 AM |
230 | void |
231 | set_has_small_toc_reloc() | |
232 | { has_small_toc_reloc_ = true; } | |
233 | ||
234 | bool | |
235 | has_small_toc_reloc() const | |
236 | { return has_small_toc_reloc_; } | |
237 | ||
ec661b9d AM |
238 | void |
239 | set_has_14bit_branch(unsigned int shndx) | |
240 | { | |
241 | if (shndx >= this->has14_.size()) | |
242 | this->has14_.resize(shndx + 1); | |
243 | this->has14_[shndx] = true; | |
244 | } | |
245 | ||
246 | bool | |
247 | has_14bit_branch(unsigned int shndx) const | |
248 | { return shndx < this->has14_.size() && this->has14_[shndx]; } | |
249 | ||
250 | void | |
251 | set_stub_table(unsigned int shndx, Stub_table<size, big_endian>* stub_table) | |
252 | { | |
253 | if (shndx >= this->stub_table_.size()) | |
254 | this->stub_table_.resize(shndx + 1); | |
255 | this->stub_table_[shndx] = stub_table; | |
256 | } | |
257 | ||
258 | Stub_table<size, big_endian>* | |
259 | stub_table(unsigned int shndx) | |
260 | { | |
261 | if (shndx < this->stub_table_.size()) | |
262 | return this->stub_table_[shndx]; | |
263 | return NULL; | |
264 | } | |
265 | ||
cf43a2fe | 266 | private: |
bfdfa4cd AM |
267 | struct Opd_ent |
268 | { | |
269 | unsigned int shndx; | |
c6de8ed4 AM |
270 | bool discard : 1; |
271 | bool gc_mark : 1; | |
26a4e9cb | 272 | Address off; |
bfdfa4cd AM |
273 | }; |
274 | ||
275 | // Return index into opd_ent_ array for .opd entry at OFF. | |
276 | // .opd entries are 24 bytes long, but they can be spaced 16 bytes | |
277 | // apart when the language doesn't use the last 8-byte word, the | |
278 | // environment pointer. Thus dividing the entry section offset by | |
279 | // 16 will give an index into opd_ent_ that works for either layout | |
280 | // of .opd. (It leaves some elements of the vector unused when .opd | |
281 | // entries are spaced 24 bytes apart, but we don't know the spacing | |
282 | // until relocations are processed, and in any case it is possible | |
283 | // for an object to have some entries spaced 16 bytes apart and | |
284 | // others 24 bytes apart.) | |
c9269dff AM |
285 | size_t |
286 | opd_ent_ndx(size_t off) const | |
287 | { return off >> 4;} | |
288 | ||
289 | // For 32-bit the .got2 section shdnx, for 64-bit the .opd section shndx. | |
290 | unsigned int special_; | |
bfdfa4cd | 291 | |
d8f5a274 AM |
292 | // For 64-bit, whether this object uses small model relocs to access |
293 | // the toc. | |
294 | bool has_small_toc_reloc_; | |
295 | ||
bfdfa4cd AM |
296 | // Set at the start of gc_process_relocs, when we know opd_ent_ |
297 | // vector is valid. The flag could be made atomic and set in | |
298 | // do_read_relocs with memory_order_release and then tested with | |
299 | // memory_order_acquire, potentially resulting in fewer entries in | |
300 | // access_from_map_. | |
301 | bool opd_valid_; | |
302 | ||
c9269dff AM |
303 | // The first 8-byte word of an OPD entry gives the address of the |
304 | // entry point of the function. Relocatable object files have a | |
bfdfa4cd | 305 | // relocation on this word. The following vector records the |
c9269dff | 306 | // section and offset specified by these relocations. |
bfdfa4cd AM |
307 | std::vector<Opd_ent> opd_ent_; |
308 | ||
e81fea4d | 309 | // References made to this object's .opd section when running |
bfdfa4cd AM |
310 | // gc_process_relocs for another object, before the opd_ent_ vector |
311 | // is valid for this object. | |
e81fea4d | 312 | Access_from access_from_map_; |
ec661b9d AM |
313 | |
314 | // Whether input section has a 14-bit branch reloc. | |
315 | std::vector<bool> has14_; | |
316 | ||
317 | // The stub table to use for a given input section. | |
318 | std::vector<Stub_table<size, big_endian>*> stub_table_; | |
cf43a2fe AM |
319 | }; |
320 | ||
42cacb20 DE |
321 | template<int size, bool big_endian> |
322 | class Target_powerpc : public Sized_target<size, big_endian> | |
323 | { | |
324 | public: | |
d83ce4e3 AM |
325 | typedef |
326 | Output_data_reloc<elfcpp::SHT_RELA, true, size, big_endian> Reloc_section; | |
c9269dff | 327 | typedef typename elfcpp::Elf_types<size>::Elf_Addr Address; |
dd93cd0a | 328 | typedef typename elfcpp::Elf_types<size>::Elf_Swxword Signed_address; |
c9269dff | 329 | static const Address invalid_address = static_cast<Address>(0) - 1; |
dd93cd0a AM |
330 | // Offset of tp and dtp pointers from start of TLS block. |
331 | static const Address tp_offset = 0x7000; | |
332 | static const Address dtp_offset = 0x8000; | |
42cacb20 DE |
333 | |
334 | Target_powerpc() | |
335 | : Sized_target<size, big_endian>(&powerpc_info), | |
ec661b9d AM |
336 | got_(NULL), plt_(NULL), iplt_(NULL), brlt_section_(NULL), |
337 | glink_(NULL), rela_dyn_(NULL), copy_relocs_(elfcpp::R_POWERPC_COPY), | |
338 | dynbss_(NULL), tlsld_got_offset_(-1U), | |
9e69ed50 AM |
339 | stub_tables_(), branch_lookup_table_(), branch_info_(), |
340 | plt_thread_safe_(false) | |
42cacb20 DE |
341 | { |
342 | } | |
343 | ||
2e702c99 | 344 | // Process the relocations to determine unreferenced sections for |
6d03d481 ST |
345 | // garbage collection. |
346 | void | |
ad0f2072 | 347 | gc_process_relocs(Symbol_table* symtab, |
2e702c99 RM |
348 | Layout* layout, |
349 | Sized_relobj_file<size, big_endian>* object, | |
350 | unsigned int data_shndx, | |
351 | unsigned int sh_type, | |
352 | const unsigned char* prelocs, | |
353 | size_t reloc_count, | |
354 | Output_section* output_section, | |
355 | bool needs_special_offset_handling, | |
356 | size_t local_symbol_count, | |
357 | const unsigned char* plocal_symbols); | |
6d03d481 | 358 | |
42cacb20 DE |
359 | // Scan the relocations to look for symbol adjustments. |
360 | void | |
ad0f2072 | 361 | scan_relocs(Symbol_table* symtab, |
42cacb20 | 362 | Layout* layout, |
6fa2a40b | 363 | Sized_relobj_file<size, big_endian>* object, |
42cacb20 DE |
364 | unsigned int data_shndx, |
365 | unsigned int sh_type, | |
366 | const unsigned char* prelocs, | |
367 | size_t reloc_count, | |
368 | Output_section* output_section, | |
369 | bool needs_special_offset_handling, | |
370 | size_t local_symbol_count, | |
371 | const unsigned char* plocal_symbols); | |
921b5322 AM |
372 | |
373 | // Map input .toc section to output .got section. | |
374 | const char* | |
375 | do_output_section_name(const Relobj*, const char* name, size_t* plen) const | |
376 | { | |
377 | if (size == 64 && strcmp(name, ".toc") == 0) | |
378 | { | |
379 | *plen = 4; | |
380 | return ".got"; | |
381 | } | |
382 | return NULL; | |
383 | } | |
384 | ||
f3a0ed29 AM |
385 | // Provide linker defined save/restore functions. |
386 | void | |
387 | define_save_restore_funcs(Layout*, Symbol_table*); | |
388 | ||
ec661b9d AM |
389 | // No stubs unless a final link. |
390 | bool | |
391 | do_may_relax() const | |
392 | { return !parameters->options().relocatable(); } | |
393 | ||
394 | bool | |
395 | do_relax(int, const Input_objects*, Symbol_table*, Layout*, const Task*); | |
396 | ||
397 | // Stash info about branches, for stub generation. | |
398 | void | |
399 | push_branch(Powerpc_relobj<size, big_endian>* ppc_object, | |
400 | unsigned int data_shndx, Address r_offset, | |
401 | unsigned int r_type, unsigned int r_sym, Address addend) | |
402 | { | |
403 | Branch_info info(ppc_object, data_shndx, r_offset, r_type, r_sym, addend); | |
404 | this->branch_info_.push_back(info); | |
405 | if (r_type == elfcpp::R_POWERPC_REL14 | |
406 | || r_type == elfcpp::R_POWERPC_REL14_BRTAKEN | |
407 | || r_type == elfcpp::R_POWERPC_REL14_BRNTAKEN) | |
408 | ppc_object->set_has_14bit_branch(data_shndx); | |
409 | } | |
410 | ||
411 | Stub_table<size, big_endian>* | |
412 | new_stub_table(); | |
413 | ||
f43ba157 AM |
414 | void |
415 | do_define_standard_symbols(Symbol_table*, Layout*); | |
416 | ||
42cacb20 DE |
417 | // Finalize the sections. |
418 | void | |
f59f41f3 | 419 | do_finalize_sections(Layout*, const Input_objects*, Symbol_table*); |
42cacb20 DE |
420 | |
421 | // Return the value to use for a dynamic which requires special | |
422 | // treatment. | |
423 | uint64_t | |
424 | do_dynsym_value(const Symbol*) const; | |
425 | ||
c9824451 AM |
426 | // Return the PLT address to use for a local symbol. |
427 | uint64_t | |
428 | do_plt_address_for_local(const Relobj*, unsigned int) const; | |
429 | ||
430 | // Return the PLT address to use for a global symbol. | |
431 | uint64_t | |
432 | do_plt_address_for_global(const Symbol*) const; | |
433 | ||
bd73a62d AM |
434 | // Return the offset to use for the GOT_INDX'th got entry which is |
435 | // for a local tls symbol specified by OBJECT, SYMNDX. | |
436 | int64_t | |
437 | do_tls_offset_for_local(const Relobj* object, | |
438 | unsigned int symndx, | |
439 | unsigned int got_indx) const; | |
440 | ||
441 | // Return the offset to use for the GOT_INDX'th got entry which is | |
442 | // for global tls symbol GSYM. | |
443 | int64_t | |
444 | do_tls_offset_for_global(Symbol* gsym, unsigned int got_indx) const; | |
445 | ||
42cacb20 DE |
446 | // Relocate a section. |
447 | void | |
448 | relocate_section(const Relocate_info<size, big_endian>*, | |
449 | unsigned int sh_type, | |
450 | const unsigned char* prelocs, | |
451 | size_t reloc_count, | |
452 | Output_section* output_section, | |
453 | bool needs_special_offset_handling, | |
454 | unsigned char* view, | |
c9269dff | 455 | Address view_address, |
364c7fa5 ILT |
456 | section_size_type view_size, |
457 | const Reloc_symbol_changes*); | |
42cacb20 DE |
458 | |
459 | // Scan the relocs during a relocatable link. | |
460 | void | |
ad0f2072 | 461 | scan_relocatable_relocs(Symbol_table* symtab, |
42cacb20 | 462 | Layout* layout, |
6fa2a40b | 463 | Sized_relobj_file<size, big_endian>* object, |
42cacb20 DE |
464 | unsigned int data_shndx, |
465 | unsigned int sh_type, | |
466 | const unsigned char* prelocs, | |
467 | size_t reloc_count, | |
468 | Output_section* output_section, | |
469 | bool needs_special_offset_handling, | |
470 | size_t local_symbol_count, | |
471 | const unsigned char* plocal_symbols, | |
472 | Relocatable_relocs*); | |
473 | ||
7404fe1b | 474 | // Emit relocations for a section. |
42cacb20 | 475 | void |
7404fe1b AM |
476 | relocate_relocs(const Relocate_info<size, big_endian>*, |
477 | unsigned int sh_type, | |
478 | const unsigned char* prelocs, | |
479 | size_t reloc_count, | |
480 | Output_section* output_section, | |
62fe925a RM |
481 | typename elfcpp::Elf_types<size>::Elf_Off |
482 | offset_in_output_section, | |
7404fe1b AM |
483 | const Relocatable_relocs*, |
484 | unsigned char*, | |
485 | Address view_address, | |
486 | section_size_type, | |
487 | unsigned char* reloc_view, | |
488 | section_size_type reloc_view_size); | |
42cacb20 DE |
489 | |
490 | // Return whether SYM is defined by the ABI. | |
491 | bool | |
9c2d0ef9 | 492 | do_is_defined_by_abi(const Symbol* sym) const |
42cacb20 | 493 | { |
cf43a2fe | 494 | return strcmp(sym->name(), "__tls_get_addr") == 0; |
42cacb20 DE |
495 | } |
496 | ||
497 | // Return the size of the GOT section. | |
498 | section_size_type | |
0e70b911 | 499 | got_size() const |
42cacb20 DE |
500 | { |
501 | gold_assert(this->got_ != NULL); | |
502 | return this->got_->data_size(); | |
503 | } | |
504 | ||
cf43a2fe AM |
505 | // Get the PLT section. |
506 | const Output_data_plt_powerpc<size, big_endian>* | |
507 | plt_section() const | |
508 | { | |
509 | gold_assert(this->plt_ != NULL); | |
510 | return this->plt_; | |
511 | } | |
512 | ||
e5d5f5ed AM |
513 | // Get the IPLT section. |
514 | const Output_data_plt_powerpc<size, big_endian>* | |
515 | iplt_section() const | |
516 | { | |
517 | gold_assert(this->iplt_ != NULL); | |
518 | return this->iplt_; | |
519 | } | |
520 | ||
cf43a2fe AM |
521 | // Get the .glink section. |
522 | const Output_data_glink<size, big_endian>* | |
523 | glink_section() const | |
524 | { | |
525 | gold_assert(this->glink_ != NULL); | |
526 | return this->glink_; | |
527 | } | |
528 | ||
529 | // Get the GOT section. | |
530 | const Output_data_got_powerpc<size, big_endian>* | |
531 | got_section() const | |
532 | { | |
533 | gold_assert(this->got_ != NULL); | |
534 | return this->got_; | |
535 | } | |
536 | ||
26a4e9cb AM |
537 | // Get the GOT section, creating it if necessary. |
538 | Output_data_got_powerpc<size, big_endian>* | |
539 | got_section(Symbol_table*, Layout*); | |
540 | ||
cf43a2fe AM |
541 | Object* |
542 | do_make_elf_object(const std::string&, Input_file*, off_t, | |
543 | const elfcpp::Ehdr<size, big_endian>&); | |
544 | ||
0e70b911 CC |
545 | // Return the number of entries in the GOT. |
546 | unsigned int | |
547 | got_entry_count() const | |
548 | { | |
549 | if (this->got_ == NULL) | |
550 | return 0; | |
551 | return this->got_size() / (size / 8); | |
552 | } | |
553 | ||
554 | // Return the number of entries in the PLT. | |
555 | unsigned int | |
556 | plt_entry_count() const; | |
557 | ||
558 | // Return the offset of the first non-reserved PLT entry. | |
559 | unsigned int | |
560 | first_plt_entry_offset() const; | |
561 | ||
562 | // Return the size of each PLT entry. | |
563 | unsigned int | |
564 | plt_entry_size() const; | |
565 | ||
e81fea4d AM |
566 | // Add any special sections for this symbol to the gc work list. |
567 | // For powerpc64, this adds the code section of a function | |
568 | // descriptor. | |
569 | void | |
570 | do_gc_mark_symbol(Symbol_table* symtab, Symbol* sym) const; | |
571 | ||
572 | // Handle target specific gc actions when adding a gc reference from | |
573 | // SRC_OBJ, SRC_SHNDX to a location specified by DST_OBJ, DST_SHNDX | |
574 | // and DST_OFF. For powerpc64, this adds a referenc to the code | |
575 | // section of a function descriptor. | |
576 | void | |
577 | do_gc_add_reference(Symbol_table* symtab, | |
578 | Object* src_obj, | |
579 | unsigned int src_shndx, | |
580 | Object* dst_obj, | |
581 | unsigned int dst_shndx, | |
582 | Address dst_off) const; | |
583 | ||
ec661b9d AM |
584 | typedef std::vector<Stub_table<size, big_endian>*> Stub_tables; |
585 | const Stub_tables& | |
586 | stub_tables() const | |
587 | { return this->stub_tables_; } | |
588 | ||
589 | const Output_data_brlt_powerpc<size, big_endian>* | |
590 | brlt_section() const | |
591 | { return this->brlt_section_; } | |
592 | ||
593 | void | |
594 | add_branch_lookup_table(Address to) | |
595 | { | |
596 | unsigned int off = this->branch_lookup_table_.size() * (size / 8); | |
597 | this->branch_lookup_table_.insert(std::make_pair(to, off)); | |
598 | } | |
599 | ||
600 | Address | |
601 | find_branch_lookup_table(Address to) | |
602 | { | |
603 | typename Branch_lookup_table::const_iterator p | |
604 | = this->branch_lookup_table_.find(to); | |
605 | return p == this->branch_lookup_table_.end() ? invalid_address : p->second; | |
606 | } | |
607 | ||
608 | void | |
609 | write_branch_lookup_table(unsigned char *oview) | |
610 | { | |
611 | for (typename Branch_lookup_table::const_iterator p | |
612 | = this->branch_lookup_table_.begin(); | |
613 | p != this->branch_lookup_table_.end(); | |
614 | ++p) | |
615 | { | |
616 | elfcpp::Swap<32, big_endian>::writeval(oview + p->second, p->first); | |
617 | } | |
618 | } | |
619 | ||
9e69ed50 AM |
620 | bool |
621 | plt_thread_safe() const | |
622 | { return this->plt_thread_safe_; } | |
623 | ||
42cacb20 DE |
624 | private: |
625 | ||
626 | // The class which scans relocations. | |
627 | class Scan | |
628 | { | |
629 | public: | |
bfdfa4cd AM |
630 | typedef typename elfcpp::Elf_types<size>::Elf_Addr Address; |
631 | ||
42cacb20 DE |
632 | Scan() |
633 | : issued_non_pic_error_(false) | |
634 | { } | |
635 | ||
95a2c8d6 RS |
636 | static inline int |
637 | get_reference_flags(unsigned int r_type); | |
638 | ||
42cacb20 | 639 | inline void |
ad0f2072 | 640 | local(Symbol_table* symtab, Layout* layout, Target_powerpc* target, |
6fa2a40b | 641 | Sized_relobj_file<size, big_endian>* object, |
42cacb20 DE |
642 | unsigned int data_shndx, |
643 | Output_section* output_section, | |
644 | const elfcpp::Rela<size, big_endian>& reloc, unsigned int r_type, | |
bfdfa4cd AM |
645 | const elfcpp::Sym<size, big_endian>& lsym, |
646 | bool is_discarded); | |
42cacb20 DE |
647 | |
648 | inline void | |
ad0f2072 | 649 | global(Symbol_table* symtab, Layout* layout, Target_powerpc* target, |
6fa2a40b | 650 | Sized_relobj_file<size, big_endian>* object, |
42cacb20 DE |
651 | unsigned int data_shndx, |
652 | Output_section* output_section, | |
653 | const elfcpp::Rela<size, big_endian>& reloc, unsigned int r_type, | |
654 | Symbol* gsym); | |
655 | ||
21bb3914 ST |
656 | inline bool |
657 | local_reloc_may_be_function_pointer(Symbol_table* , Layout* , | |
658 | Target_powerpc* , | |
2e702c99 | 659 | Sized_relobj_file<size, big_endian>* , |
21bb3914 | 660 | unsigned int , |
2e702c99 RM |
661 | Output_section* , |
662 | const elfcpp::Rela<size, big_endian>& , | |
663 | unsigned int , | |
664 | const elfcpp::Sym<size, big_endian>&) | |
21bb3914 ST |
665 | { return false; } |
666 | ||
667 | inline bool | |
668 | global_reloc_may_be_function_pointer(Symbol_table* , Layout* , | |
669 | Target_powerpc* , | |
2e702c99 RM |
670 | Sized_relobj_file<size, big_endian>* , |
671 | unsigned int , | |
672 | Output_section* , | |
673 | const elfcpp::Rela<size, | |
21bb3914 ST |
674 | big_endian>& , |
675 | unsigned int , Symbol*) | |
676 | { return false; } | |
677 | ||
42cacb20 DE |
678 | private: |
679 | static void | |
6fa2a40b | 680 | unsupported_reloc_local(Sized_relobj_file<size, big_endian>*, |
42cacb20 DE |
681 | unsigned int r_type); |
682 | ||
683 | static void | |
6fa2a40b | 684 | unsupported_reloc_global(Sized_relobj_file<size, big_endian>*, |
42cacb20 DE |
685 | unsigned int r_type, Symbol*); |
686 | ||
687 | static void | |
688 | generate_tls_call(Symbol_table* symtab, Layout* layout, | |
689 | Target_powerpc* target); | |
690 | ||
691 | void | |
692 | check_non_pic(Relobj*, unsigned int r_type); | |
693 | ||
e5d5f5ed AM |
694 | bool |
695 | reloc_needs_plt_for_ifunc(Sized_relobj_file<size, big_endian>* object, | |
696 | unsigned int r_type); | |
697 | ||
42cacb20 DE |
698 | // Whether we have issued an error about a non-PIC compilation. |
699 | bool issued_non_pic_error_; | |
700 | }; | |
701 | ||
3ea0a085 AM |
702 | Address |
703 | symval_for_branch(Address value, const Sized_symbol<size>* gsym, | |
704 | Powerpc_relobj<size, big_endian>* object, | |
705 | unsigned int *dest_shndx); | |
706 | ||
42cacb20 DE |
707 | // The class which implements relocation. |
708 | class Relocate | |
709 | { | |
710 | public: | |
dd93cd0a AM |
711 | // Use 'at' branch hints when true, 'y' when false. |
712 | // FIXME maybe: set this with an option. | |
713 | static const bool is_isa_v2 = true; | |
714 | ||
715 | enum skip_tls | |
716 | { | |
717 | CALL_NOT_EXPECTED = 0, | |
718 | CALL_EXPECTED = 1, | |
719 | CALL_SKIP = 2 | |
720 | }; | |
721 | ||
722 | Relocate() | |
723 | : call_tls_get_addr_(CALL_NOT_EXPECTED) | |
724 | { } | |
725 | ||
726 | ~Relocate() | |
727 | { | |
728 | if (this->call_tls_get_addr_ != CALL_NOT_EXPECTED) | |
729 | { | |
730 | // FIXME: This needs to specify the location somehow. | |
731 | gold_error(_("missing expected __tls_get_addr call")); | |
732 | } | |
733 | } | |
734 | ||
42cacb20 DE |
735 | // Do a relocation. Return false if the caller should not issue |
736 | // any warnings about this relocation. | |
737 | inline bool | |
738 | relocate(const Relocate_info<size, big_endian>*, Target_powerpc*, | |
031cdbed ILT |
739 | Output_section*, size_t relnum, |
740 | const elfcpp::Rela<size, big_endian>&, | |
42cacb20 DE |
741 | unsigned int r_type, const Sized_symbol<size>*, |
742 | const Symbol_value<size>*, | |
743 | unsigned char*, | |
744 | typename elfcpp::Elf_types<size>::Elf_Addr, | |
745 | section_size_type); | |
746 | ||
dd93cd0a AM |
747 | // This is set if we should skip the next reloc, which should be a |
748 | // call to __tls_get_addr. | |
749 | enum skip_tls call_tls_get_addr_; | |
42cacb20 DE |
750 | }; |
751 | ||
168a4726 AM |
752 | class Relocate_comdat_behavior |
753 | { | |
754 | public: | |
755 | // Decide what the linker should do for relocations that refer to | |
756 | // discarded comdat sections. | |
757 | inline Comdat_behavior | |
758 | get(const char* name) | |
759 | { | |
760 | gold::Default_comdat_behavior default_behavior; | |
761 | Comdat_behavior ret = default_behavior.get(name); | |
762 | if (ret == CB_WARNING) | |
763 | { | |
764 | if (size == 32 | |
765 | && (strcmp(name, ".fixup") == 0 | |
766 | || strcmp(name, ".got2") == 0)) | |
767 | ret = CB_IGNORE; | |
768 | if (size == 64 | |
769 | && (strcmp(name, ".opd") == 0 | |
770 | || strcmp(name, ".toc") == 0 | |
771 | || strcmp(name, ".toc1") == 0)) | |
772 | ret = CB_IGNORE; | |
773 | } | |
774 | return ret; | |
775 | } | |
776 | }; | |
777 | ||
42cacb20 DE |
778 | // A class which returns the size required for a relocation type, |
779 | // used while scanning relocs during a relocatable link. | |
780 | class Relocatable_size_for_reloc | |
781 | { | |
782 | public: | |
783 | unsigned int | |
cf43a2fe AM |
784 | get_size_for_reloc(unsigned int, Relobj*) |
785 | { | |
786 | gold_unreachable(); | |
787 | return 0; | |
788 | } | |
42cacb20 DE |
789 | }; |
790 | ||
dd93cd0a AM |
791 | // Optimize the TLS relocation type based on what we know about the |
792 | // symbol. IS_FINAL is true if the final address of this symbol is | |
793 | // known at link time. | |
794 | ||
795 | tls::Tls_optimization | |
796 | optimize_tls_gd(bool is_final) | |
797 | { | |
798 | // If we are generating a shared library, then we can't do anything | |
799 | // in the linker. | |
800 | if (parameters->options().shared()) | |
801 | return tls::TLSOPT_NONE; | |
802 | ||
803 | if (!is_final) | |
804 | return tls::TLSOPT_TO_IE; | |
805 | return tls::TLSOPT_TO_LE; | |
806 | } | |
807 | ||
808 | tls::Tls_optimization | |
809 | optimize_tls_ld() | |
810 | { | |
811 | if (parameters->options().shared()) | |
812 | return tls::TLSOPT_NONE; | |
813 | ||
814 | return tls::TLSOPT_TO_LE; | |
815 | } | |
816 | ||
817 | tls::Tls_optimization | |
818 | optimize_tls_ie(bool is_final) | |
819 | { | |
820 | if (!is_final || parameters->options().shared()) | |
821 | return tls::TLSOPT_NONE; | |
822 | ||
823 | return tls::TLSOPT_TO_LE; | |
824 | } | |
cf43a2fe | 825 | |
cf43a2fe AM |
826 | // Create glink. |
827 | void | |
828 | make_glink_section(Layout*); | |
42cacb20 | 829 | |
cf43a2fe AM |
830 | // Create the PLT section. |
831 | void | |
40b469d7 | 832 | make_plt_section(Symbol_table*, Layout*); |
42cacb20 | 833 | |
e5d5f5ed | 834 | void |
40b469d7 | 835 | make_iplt_section(Symbol_table*, Layout*); |
e5d5f5ed | 836 | |
ec661b9d AM |
837 | void |
838 | make_brlt_section(Layout*); | |
839 | ||
42cacb20 DE |
840 | // Create a PLT entry for a global symbol. |
841 | void | |
ec661b9d | 842 | make_plt_entry(Symbol_table*, Layout*, Symbol*); |
e5d5f5ed AM |
843 | |
844 | // Create a PLT entry for a local IFUNC symbol. | |
845 | void | |
40b469d7 | 846 | make_local_ifunc_plt_entry(Symbol_table*, Layout*, |
ec661b9d AM |
847 | Sized_relobj_file<size, big_endian>*, |
848 | unsigned int); | |
849 | ||
42cacb20 | 850 | |
dd93cd0a AM |
851 | // Create a GOT entry for local dynamic __tls_get_addr. |
852 | unsigned int | |
853 | tlsld_got_offset(Symbol_table* symtab, Layout* layout, | |
854 | Sized_relobj_file<size, big_endian>* object); | |
855 | ||
42cacb20 | 856 | unsigned int |
dd93cd0a AM |
857 | tlsld_got_offset() const |
858 | { | |
859 | return this->tlsld_got_offset_; | |
860 | } | |
42cacb20 | 861 | |
42cacb20 DE |
862 | // Get the dynamic reloc section, creating it if necessary. |
863 | Reloc_section* | |
864 | rela_dyn_section(Layout*); | |
865 | ||
42cacb20 DE |
866 | // Copy a relocation against a global symbol. |
867 | void | |
ef9beddf | 868 | copy_reloc(Symbol_table* symtab, Layout* layout, |
2e702c99 | 869 | Sized_relobj_file<size, big_endian>* object, |
42cacb20 DE |
870 | unsigned int shndx, Output_section* output_section, |
871 | Symbol* sym, const elfcpp::Rela<size, big_endian>& reloc) | |
872 | { | |
873 | this->copy_relocs_.copy_reloc(symtab, layout, | |
874 | symtab->get_sized_symbol<size>(sym), | |
875 | object, shndx, output_section, | |
876 | reloc, this->rela_dyn_section(layout)); | |
877 | } | |
878 | ||
ec661b9d AM |
879 | // Look over all the input sections, deciding where to place stub. |
880 | void | |
881 | group_sections(Layout*, const Task*); | |
882 | ||
883 | // Sort output sections by address. | |
884 | struct Sort_sections | |
885 | { | |
886 | bool | |
887 | operator()(const Output_section* sec1, const Output_section* sec2) | |
888 | { return sec1->address() < sec2->address(); } | |
889 | }; | |
890 | ||
891 | class Branch_info | |
892 | { | |
893 | public: | |
894 | Branch_info(Powerpc_relobj<size, big_endian>* ppc_object, | |
895 | unsigned int data_shndx, | |
896 | Address r_offset, | |
897 | unsigned int r_type, | |
898 | unsigned int r_sym, | |
899 | Address addend) | |
900 | : object_(ppc_object), shndx_(data_shndx), offset_(r_offset), | |
901 | r_type_(r_type), r_sym_(r_sym), addend_(addend) | |
902 | { } | |
903 | ||
904 | ~Branch_info() | |
905 | { } | |
906 | ||
907 | // If this branch needs a plt call stub, or a long branch stub, make one. | |
908 | void | |
909 | make_stub(Stub_table<size, big_endian>*, | |
910 | Stub_table<size, big_endian>*, | |
911 | Symbol_table*) const; | |
912 | ||
913 | private: | |
914 | // The branch location.. | |
915 | Powerpc_relobj<size, big_endian>* object_; | |
916 | unsigned int shndx_; | |
917 | Address offset_; | |
918 | // ..and the branch type and destination. | |
919 | unsigned int r_type_; | |
920 | unsigned int r_sym_; | |
921 | Address addend_; | |
922 | }; | |
923 | ||
42cacb20 DE |
924 | // Information about this specific target which we pass to the |
925 | // general Target structure. | |
926 | static Target::Target_info powerpc_info; | |
927 | ||
928 | // The types of GOT entries needed for this platform. | |
0e70b911 CC |
929 | // These values are exposed to the ABI in an incremental link. |
930 | // Do not renumber existing values without changing the version | |
931 | // number of the .gnu_incremental_inputs section. | |
42cacb20 DE |
932 | enum Got_type |
933 | { | |
dd93cd0a AM |
934 | GOT_TYPE_STANDARD, |
935 | GOT_TYPE_TLSGD, // double entry for @got@tlsgd | |
936 | GOT_TYPE_DTPREL, // entry for @got@dtprel | |
937 | GOT_TYPE_TPREL // entry for @got@tprel | |
42cacb20 DE |
938 | }; |
939 | ||
ec661b9d | 940 | // The GOT section. |
cf43a2fe | 941 | Output_data_got_powerpc<size, big_endian>* got_; |
ec661b9d | 942 | // The PLT section. |
42cacb20 | 943 | Output_data_plt_powerpc<size, big_endian>* plt_; |
ec661b9d | 944 | // The IPLT section. |
e5d5f5ed | 945 | Output_data_plt_powerpc<size, big_endian>* iplt_; |
ec661b9d AM |
946 | // Section holding long branch destinations. |
947 | Output_data_brlt_powerpc<size, big_endian>* brlt_section_; | |
948 | // The .glink section. | |
cf43a2fe | 949 | Output_data_glink<size, big_endian>* glink_; |
ec661b9d | 950 | // The dynamic reloc section. |
42cacb20 DE |
951 | Reloc_section* rela_dyn_; |
952 | // Relocs saved to avoid a COPY reloc. | |
953 | Copy_relocs<elfcpp::SHT_RELA, size, big_endian> copy_relocs_; | |
954 | // Space for variables copied with a COPY reloc. | |
955 | Output_data_space* dynbss_; | |
dd93cd0a AM |
956 | // Offset of the GOT entry for local dynamic __tls_get_addr calls. |
957 | unsigned int tlsld_got_offset_; | |
ec661b9d AM |
958 | |
959 | Stub_tables stub_tables_; | |
960 | typedef Unordered_map<Address, unsigned int> Branch_lookup_table; | |
961 | Branch_lookup_table branch_lookup_table_; | |
962 | ||
963 | typedef std::vector<Branch_info> Branches; | |
964 | Branches branch_info_; | |
9e69ed50 AM |
965 | |
966 | bool plt_thread_safe_; | |
42cacb20 DE |
967 | }; |
968 | ||
969 | template<> | |
970 | Target::Target_info Target_powerpc<32, true>::powerpc_info = | |
971 | { | |
972 | 32, // size | |
973 | true, // is_big_endian | |
974 | elfcpp::EM_PPC, // machine_code | |
975 | false, // has_make_symbol | |
976 | false, // has_resolve | |
977 | false, // has_code_fill | |
978 | true, // is_default_stack_executable | |
b3ce541e | 979 | false, // can_icf_inline_merge_sections |
42cacb20 DE |
980 | '\0', // wrap_char |
981 | "/usr/lib/ld.so.1", // dynamic_linker | |
982 | 0x10000000, // default_text_segment_address | |
983 | 64 * 1024, // abi_pagesize (overridable by -z max-page-size) | |
8a5e3e08 | 984 | 4 * 1024, // common_pagesize (overridable by -z common-page-size) |
c9269dff AM |
985 | false, // isolate_execinstr |
986 | 0, // rosegment_gap | |
8a5e3e08 ILT |
987 | elfcpp::SHN_UNDEF, // small_common_shndx |
988 | elfcpp::SHN_UNDEF, // large_common_shndx | |
989 | 0, // small_common_section_flags | |
05a352e6 DK |
990 | 0, // large_common_section_flags |
991 | NULL, // attributes_section | |
992 | NULL // attributes_vendor | |
42cacb20 DE |
993 | }; |
994 | ||
995 | template<> | |
996 | Target::Target_info Target_powerpc<32, false>::powerpc_info = | |
997 | { | |
998 | 32, // size | |
999 | false, // is_big_endian | |
1000 | elfcpp::EM_PPC, // machine_code | |
1001 | false, // has_make_symbol | |
1002 | false, // has_resolve | |
1003 | false, // has_code_fill | |
1004 | true, // is_default_stack_executable | |
b3ce541e | 1005 | false, // can_icf_inline_merge_sections |
42cacb20 DE |
1006 | '\0', // wrap_char |
1007 | "/usr/lib/ld.so.1", // dynamic_linker | |
1008 | 0x10000000, // default_text_segment_address | |
1009 | 64 * 1024, // abi_pagesize (overridable by -z max-page-size) | |
8a5e3e08 | 1010 | 4 * 1024, // common_pagesize (overridable by -z common-page-size) |
c9269dff AM |
1011 | false, // isolate_execinstr |
1012 | 0, // rosegment_gap | |
8a5e3e08 ILT |
1013 | elfcpp::SHN_UNDEF, // small_common_shndx |
1014 | elfcpp::SHN_UNDEF, // large_common_shndx | |
1015 | 0, // small_common_section_flags | |
05a352e6 DK |
1016 | 0, // large_common_section_flags |
1017 | NULL, // attributes_section | |
1018 | NULL // attributes_vendor | |
42cacb20 DE |
1019 | }; |
1020 | ||
1021 | template<> | |
1022 | Target::Target_info Target_powerpc<64, true>::powerpc_info = | |
1023 | { | |
1024 | 64, // size | |
1025 | true, // is_big_endian | |
1026 | elfcpp::EM_PPC64, // machine_code | |
1027 | false, // has_make_symbol | |
1028 | false, // has_resolve | |
1029 | false, // has_code_fill | |
1030 | true, // is_default_stack_executable | |
b3ce541e | 1031 | false, // can_icf_inline_merge_sections |
42cacb20 DE |
1032 | '\0', // wrap_char |
1033 | "/usr/lib/ld.so.1", // dynamic_linker | |
1034 | 0x10000000, // default_text_segment_address | |
1035 | 64 * 1024, // abi_pagesize (overridable by -z max-page-size) | |
dd93cd0a | 1036 | 4 * 1024, // common_pagesize (overridable by -z common-page-size) |
c9269dff AM |
1037 | false, // isolate_execinstr |
1038 | 0, // rosegment_gap | |
8a5e3e08 ILT |
1039 | elfcpp::SHN_UNDEF, // small_common_shndx |
1040 | elfcpp::SHN_UNDEF, // large_common_shndx | |
1041 | 0, // small_common_section_flags | |
05a352e6 DK |
1042 | 0, // large_common_section_flags |
1043 | NULL, // attributes_section | |
1044 | NULL // attributes_vendor | |
42cacb20 DE |
1045 | }; |
1046 | ||
1047 | template<> | |
1048 | Target::Target_info Target_powerpc<64, false>::powerpc_info = | |
1049 | { | |
1050 | 64, // size | |
1051 | false, // is_big_endian | |
1052 | elfcpp::EM_PPC64, // machine_code | |
1053 | false, // has_make_symbol | |
1054 | false, // has_resolve | |
1055 | false, // has_code_fill | |
1056 | true, // is_default_stack_executable | |
b3ce541e | 1057 | false, // can_icf_inline_merge_sections |
42cacb20 DE |
1058 | '\0', // wrap_char |
1059 | "/usr/lib/ld.so.1", // dynamic_linker | |
1060 | 0x10000000, // default_text_segment_address | |
1061 | 64 * 1024, // abi_pagesize (overridable by -z max-page-size) | |
dd93cd0a | 1062 | 4 * 1024, // common_pagesize (overridable by -z common-page-size) |
c9269dff AM |
1063 | false, // isolate_execinstr |
1064 | 0, // rosegment_gap | |
8a5e3e08 ILT |
1065 | elfcpp::SHN_UNDEF, // small_common_shndx |
1066 | elfcpp::SHN_UNDEF, // large_common_shndx | |
1067 | 0, // small_common_section_flags | |
05a352e6 DK |
1068 | 0, // large_common_section_flags |
1069 | NULL, // attributes_section | |
1070 | NULL // attributes_vendor | |
42cacb20 DE |
1071 | }; |
1072 | ||
dd93cd0a AM |
1073 | inline bool |
1074 | is_branch_reloc(unsigned int r_type) | |
1075 | { | |
1076 | return (r_type == elfcpp::R_POWERPC_REL24 | |
1077 | || r_type == elfcpp::R_PPC_PLTREL24 | |
1078 | || r_type == elfcpp::R_PPC_LOCAL24PC | |
1079 | || r_type == elfcpp::R_POWERPC_REL14 | |
1080 | || r_type == elfcpp::R_POWERPC_REL14_BRTAKEN | |
1081 | || r_type == elfcpp::R_POWERPC_REL14_BRNTAKEN | |
1082 | || r_type == elfcpp::R_POWERPC_ADDR24 | |
1083 | || r_type == elfcpp::R_POWERPC_ADDR14 | |
1084 | || r_type == elfcpp::R_POWERPC_ADDR14_BRTAKEN | |
1085 | || r_type == elfcpp::R_POWERPC_ADDR14_BRNTAKEN); | |
1086 | } | |
1087 | ||
1088 | // If INSN is an opcode that may be used with an @tls operand, return | |
1089 | // the transformed insn for TLS optimisation, otherwise return 0. If | |
1090 | // REG is non-zero only match an insn with RB or RA equal to REG. | |
1091 | uint32_t | |
1092 | at_tls_transform(uint32_t insn, unsigned int reg) | |
1093 | { | |
1094 | if ((insn & (0x3f << 26)) != 31 << 26) | |
1095 | return 0; | |
1096 | ||
1097 | unsigned int rtra; | |
1098 | if (reg == 0 || ((insn >> 11) & 0x1f) == reg) | |
1099 | rtra = insn & ((1 << 26) - (1 << 16)); | |
1100 | else if (((insn >> 16) & 0x1f) == reg) | |
1101 | rtra = (insn & (0x1f << 21)) | ((insn & (0x1f << 11)) << 5); | |
1102 | else | |
1103 | return 0; | |
1104 | ||
1105 | if ((insn & (0x3ff << 1)) == 266 << 1) | |
1106 | // add -> addi | |
1107 | insn = 14 << 26; | |
1108 | else if ((insn & (0x1f << 1)) == 23 << 1 | |
1109 | && ((insn & (0x1f << 6)) < 14 << 6 | |
1110 | || ((insn & (0x1f << 6)) >= 16 << 6 | |
1111 | && (insn & (0x1f << 6)) < 24 << 6))) | |
1112 | // load and store indexed -> dform | |
1113 | insn = (32 | ((insn >> 6) & 0x1f)) << 26; | |
1114 | else if ((insn & (((0x1a << 5) | 0x1f) << 1)) == 21 << 1) | |
1115 | // ldx, ldux, stdx, stdux -> ld, ldu, std, stdu | |
1116 | insn = ((58 | ((insn >> 6) & 4)) << 26) | ((insn >> 6) & 1); | |
1117 | else if ((insn & (((0x1f << 5) | 0x1f) << 1)) == 341 << 1) | |
1118 | // lwax -> lwa | |
1119 | insn = (58 << 26) | 2; | |
1120 | else | |
1121 | return 0; | |
1122 | insn |= rtra; | |
1123 | return insn; | |
1124 | } | |
1125 | ||
1126 | // Modified version of symtab.h class Symbol member | |
1127 | // Given a direct absolute or pc-relative static relocation against | |
1128 | // the global symbol, this function returns whether a dynamic relocation | |
1129 | // is needed. | |
1130 | ||
1131 | template<int size> | |
1132 | bool | |
1133 | needs_dynamic_reloc(const Symbol* gsym, int flags) | |
1134 | { | |
1135 | // No dynamic relocations in a static link! | |
1136 | if (parameters->doing_static_link()) | |
1137 | return false; | |
1138 | ||
1139 | // A reference to an undefined symbol from an executable should be | |
1140 | // statically resolved to 0, and does not need a dynamic relocation. | |
1141 | // This matches gnu ld behavior. | |
1142 | if (gsym->is_undefined() && !parameters->options().shared()) | |
1143 | return false; | |
1144 | ||
1145 | // A reference to an absolute symbol does not need a dynamic relocation. | |
1146 | if (gsym->is_absolute()) | |
1147 | return false; | |
1148 | ||
1149 | // An absolute reference within a position-independent output file | |
1150 | // will need a dynamic relocation. | |
1151 | if ((flags & Symbol::ABSOLUTE_REF) | |
1152 | && parameters->options().output_is_position_independent()) | |
1153 | return true; | |
1154 | ||
1155 | // A function call that can branch to a local PLT entry does not need | |
1156 | // a dynamic relocation. | |
1157 | if ((flags & Symbol::FUNCTION_CALL) && gsym->has_plt_offset()) | |
1158 | return false; | |
1159 | ||
1160 | // A reference to any PLT entry in a non-position-independent executable | |
1161 | // does not need a dynamic relocation. | |
1162 | // Except due to having function descriptors on powerpc64 we don't define | |
1163 | // functions to their plt code in an executable, so this doesn't apply. | |
1164 | if (size == 32 | |
1165 | && !parameters->options().output_is_position_independent() | |
1166 | && gsym->has_plt_offset()) | |
1167 | return false; | |
1168 | ||
1169 | // A reference to a symbol defined in a dynamic object or to a | |
1170 | // symbol that is preemptible will need a dynamic relocation. | |
1171 | if (gsym->is_from_dynobj() | |
1172 | || gsym->is_undefined() | |
1173 | || gsym->is_preemptible()) | |
1174 | return true; | |
1175 | ||
1176 | // For all other cases, return FALSE. | |
1177 | return false; | |
1178 | } | |
1179 | ||
1180 | // Modified version of symtab.h class Symbol member | |
1181 | // Whether we should use the PLT offset associated with a symbol for | |
1182 | // a relocation. FLAGS is a set of Reference_flags. | |
1183 | ||
1184 | template<int size> | |
1185 | bool | |
1186 | use_plt_offset(const Symbol* gsym, int flags) | |
1187 | { | |
1188 | // If the symbol doesn't have a PLT offset, then naturally we | |
1189 | // don't want to use it. | |
1190 | if (!gsym->has_plt_offset()) | |
1191 | return false; | |
1192 | ||
1193 | // For a STT_GNU_IFUNC symbol we always have to use the PLT entry. | |
1194 | if (gsym->type() == elfcpp::STT_GNU_IFUNC) | |
1195 | return true; | |
1196 | ||
1197 | // If we are going to generate a dynamic relocation, then we will | |
1198 | // wind up using that, so no need to use the PLT entry. | |
1199 | if (needs_dynamic_reloc<size>(gsym, flags)) | |
1200 | return false; | |
1201 | ||
1202 | // If the symbol is from a dynamic object, we need to use the PLT | |
1203 | // entry. | |
1204 | if (gsym->is_from_dynobj()) | |
1205 | return true; | |
1206 | ||
9e69ed50 | 1207 | // If we are generating a shared object, and this symbol is |
dd93cd0a AM |
1208 | // undefined or preemptible, we need to use the PLT entry. |
1209 | if (parameters->options().shared() | |
1210 | && (gsym->is_undefined() || gsym->is_preemptible())) | |
1211 | return true; | |
1212 | ||
9e69ed50 | 1213 | // If this is a call to a weak undefined symbol, we need to use |
dd93cd0a AM |
1214 | // the PLT entry; the symbol may be defined by a library loaded |
1215 | // at runtime. | |
1216 | if ((flags & Symbol::FUNCTION_CALL) && gsym->is_weak_undefined()) | |
1217 | return true; | |
1218 | ||
1219 | // Otherwise we can use the regular definition. | |
1220 | return false; | |
1221 | } | |
1222 | ||
42cacb20 DE |
1223 | template<int size, bool big_endian> |
1224 | class Powerpc_relocate_functions | |
1225 | { | |
dd93cd0a | 1226 | public: |
f4baf0d4 | 1227 | enum Overflow_check |
dd93cd0a | 1228 | { |
f4baf0d4 AM |
1229 | CHECK_NONE, |
1230 | CHECK_SIGNED, | |
1231 | CHECK_BITFIELD | |
dd93cd0a AM |
1232 | }; |
1233 | ||
f4baf0d4 | 1234 | enum Status |
dd93cd0a | 1235 | { |
f4baf0d4 AM |
1236 | STATUS_OK, |
1237 | STATUS_OVERFLOW | |
1238 | }; | |
dd93cd0a | 1239 | |
42cacb20 | 1240 | private: |
c9269dff | 1241 | typedef Powerpc_relocate_functions<size, big_endian> This; |
c9269dff AM |
1242 | typedef typename elfcpp::Elf_types<size>::Elf_Addr Address; |
1243 | ||
dd93cd0a AM |
1244 | template<int valsize> |
1245 | static inline bool | |
1246 | has_overflow_signed(Address value) | |
1247 | { | |
1248 | // limit = 1 << (valsize - 1) without shift count exceeding size of type | |
1249 | Address limit = static_cast<Address>(1) << ((valsize - 1) >> 1); | |
1250 | limit <<= ((valsize - 1) >> 1); | |
1251 | limit <<= ((valsize - 1) - 2 * ((valsize - 1) >> 1)); | |
1252 | return value + limit > (limit << 1) - 1; | |
1253 | } | |
1254 | ||
1255 | template<int valsize> | |
1256 | static inline bool | |
1257 | has_overflow_bitfield(Address value) | |
1258 | { | |
1259 | Address limit = static_cast<Address>(1) << ((valsize - 1) >> 1); | |
1260 | limit <<= ((valsize - 1) >> 1); | |
1261 | limit <<= ((valsize - 1) - 2 * ((valsize - 1) >> 1)); | |
1262 | return value > (limit << 1) - 1 && value + limit > (limit << 1) - 1; | |
1263 | } | |
1264 | ||
1265 | template<int valsize> | |
f4baf0d4 AM |
1266 | static inline Status |
1267 | overflowed(Address value, Overflow_check overflow) | |
dd93cd0a | 1268 | { |
f4baf0d4 | 1269 | if (overflow == CHECK_SIGNED) |
dd93cd0a AM |
1270 | { |
1271 | if (has_overflow_signed<valsize>(value)) | |
f4baf0d4 | 1272 | return STATUS_OVERFLOW; |
dd93cd0a | 1273 | } |
f4baf0d4 | 1274 | else if (overflow == CHECK_BITFIELD) |
dd93cd0a AM |
1275 | { |
1276 | if (has_overflow_bitfield<valsize>(value)) | |
f4baf0d4 | 1277 | return STATUS_OVERFLOW; |
dd93cd0a | 1278 | } |
f4baf0d4 | 1279 | return STATUS_OK; |
dd93cd0a AM |
1280 | } |
1281 | ||
cf43a2fe | 1282 | // Do a simple RELA relocation |
42cacb20 | 1283 | template<int valsize> |
f4baf0d4 AM |
1284 | static inline Status |
1285 | rela(unsigned char* view, Address value, Overflow_check overflow) | |
dd93cd0a AM |
1286 | { |
1287 | typedef typename elfcpp::Swap<valsize, big_endian>::Valtype Valtype; | |
1288 | Valtype* wv = reinterpret_cast<Valtype*>(view); | |
1289 | elfcpp::Swap<valsize, big_endian>::writeval(wv, value); | |
1290 | return overflowed<valsize>(value, overflow); | |
1291 | } | |
1292 | ||
1293 | template<int valsize> | |
f4baf0d4 | 1294 | static inline Status |
42cacb20 DE |
1295 | rela(unsigned char* view, |
1296 | unsigned int right_shift, | |
c9269dff AM |
1297 | typename elfcpp::Valtype_base<valsize>::Valtype dst_mask, |
1298 | Address value, | |
f4baf0d4 | 1299 | Overflow_check overflow) |
42cacb20 DE |
1300 | { |
1301 | typedef typename elfcpp::Swap<valsize, big_endian>::Valtype Valtype; | |
1302 | Valtype* wv = reinterpret_cast<Valtype*>(view); | |
1303 | Valtype val = elfcpp::Swap<valsize, big_endian>::readval(wv); | |
dd93cd0a | 1304 | Valtype reloc = value >> right_shift; |
42cacb20 DE |
1305 | val &= ~dst_mask; |
1306 | reloc &= dst_mask; | |
42cacb20 | 1307 | elfcpp::Swap<valsize, big_endian>::writeval(wv, val | reloc); |
dd93cd0a | 1308 | return overflowed<valsize>(value >> right_shift, overflow); |
42cacb20 DE |
1309 | } |
1310 | ||
cf43a2fe | 1311 | // Do a simple RELA relocation, unaligned. |
42cacb20 | 1312 | template<int valsize> |
f4baf0d4 AM |
1313 | static inline Status |
1314 | rela_ua(unsigned char* view, Address value, Overflow_check overflow) | |
dd93cd0a AM |
1315 | { |
1316 | elfcpp::Swap_unaligned<valsize, big_endian>::writeval(view, value); | |
1317 | return overflowed<valsize>(value, overflow); | |
1318 | } | |
1319 | ||
1320 | template<int valsize> | |
f4baf0d4 | 1321 | static inline Status |
cf43a2fe AM |
1322 | rela_ua(unsigned char* view, |
1323 | unsigned int right_shift, | |
c9269dff AM |
1324 | typename elfcpp::Valtype_base<valsize>::Valtype dst_mask, |
1325 | Address value, | |
f4baf0d4 | 1326 | Overflow_check overflow) |
42cacb20 | 1327 | { |
c9269dff AM |
1328 | typedef typename elfcpp::Swap_unaligned<valsize, big_endian>::Valtype |
1329 | Valtype; | |
dd93cd0a AM |
1330 | Valtype val = elfcpp::Swap<valsize, big_endian>::readval(view); |
1331 | Valtype reloc = value >> right_shift; | |
42cacb20 DE |
1332 | val &= ~dst_mask; |
1333 | reloc &= dst_mask; | |
dd93cd0a AM |
1334 | elfcpp::Swap_unaligned<valsize, big_endian>::writeval(view, val | reloc); |
1335 | return overflowed<valsize>(value >> right_shift, overflow); | |
42cacb20 DE |
1336 | } |
1337 | ||
42cacb20 | 1338 | public: |
dd93cd0a | 1339 | // R_PPC64_ADDR64: (Symbol + Addend) |
42cacb20 | 1340 | static inline void |
dd93cd0a | 1341 | addr64(unsigned char* view, Address value) |
f4baf0d4 | 1342 | { This::template rela<64>(view, value, CHECK_NONE); } |
42cacb20 | 1343 | |
dd93cd0a | 1344 | // R_PPC64_UADDR64: (Symbol + Addend) unaligned |
42cacb20 | 1345 | static inline void |
dd93cd0a | 1346 | addr64_u(unsigned char* view, Address value) |
f4baf0d4 | 1347 | { This::template rela_ua<64>(view, value, CHECK_NONE); } |
dd93cd0a AM |
1348 | |
1349 | // R_POWERPC_ADDR32: (Symbol + Addend) | |
f4baf0d4 AM |
1350 | static inline Status |
1351 | addr32(unsigned char* view, Address value, Overflow_check overflow) | |
dd93cd0a AM |
1352 | { return This::template rela<32>(view, value, overflow); } |
1353 | ||
1354 | // R_POWERPC_UADDR32: (Symbol + Addend) unaligned | |
f4baf0d4 AM |
1355 | static inline Status |
1356 | addr32_u(unsigned char* view, Address value, Overflow_check overflow) | |
dd93cd0a AM |
1357 | { return This::template rela_ua<32>(view, value, overflow); } |
1358 | ||
1359 | // R_POWERPC_ADDR24: (Symbol + Addend) & 0x3fffffc | |
f4baf0d4 AM |
1360 | static inline Status |
1361 | addr24(unsigned char* view, Address value, Overflow_check overflow) | |
dd93cd0a | 1362 | { |
f4baf0d4 AM |
1363 | Status stat = This::template rela<32>(view, 0, 0x03fffffc, value, overflow); |
1364 | if (overflow != CHECK_NONE && (value & 3) != 0) | |
1365 | stat = STATUS_OVERFLOW; | |
dd93cd0a AM |
1366 | return stat; |
1367 | } | |
42cacb20 DE |
1368 | |
1369 | // R_POWERPC_ADDR16: (Symbol + Addend) & 0xffff | |
f4baf0d4 AM |
1370 | static inline Status |
1371 | addr16(unsigned char* view, Address value, Overflow_check overflow) | |
dd93cd0a | 1372 | { return This::template rela<16>(view, value, overflow); } |
42cacb20 | 1373 | |
dd93cd0a | 1374 | // R_POWERPC_ADDR16: (Symbol + Addend) & 0xffff, unaligned |
f4baf0d4 AM |
1375 | static inline Status |
1376 | addr16_u(unsigned char* view, Address value, Overflow_check overflow) | |
dd93cd0a | 1377 | { return This::template rela_ua<16>(view, value, overflow); } |
42cacb20 | 1378 | |
dd93cd0a | 1379 | // R_POWERPC_ADDR16_DS: (Symbol + Addend) & 0xfffc |
f4baf0d4 AM |
1380 | static inline Status |
1381 | addr16_ds(unsigned char* view, Address value, Overflow_check overflow) | |
dd93cd0a | 1382 | { |
f4baf0d4 AM |
1383 | Status stat = This::template rela<16>(view, 0, 0xfffc, value, overflow); |
1384 | if (overflow != CHECK_NONE && (value & 3) != 0) | |
1385 | stat = STATUS_OVERFLOW; | |
dd93cd0a AM |
1386 | return stat; |
1387 | } | |
42cacb20 | 1388 | |
42cacb20 DE |
1389 | // R_POWERPC_ADDR16_HI: ((Symbol + Addend) >> 16) & 0xffff |
1390 | static inline void | |
dd93cd0a | 1391 | addr16_hi(unsigned char* view, Address value) |
f4baf0d4 | 1392 | { This::template rela<16>(view, 16, 0xffff, value, CHECK_NONE); } |
42cacb20 | 1393 | |
c9269dff | 1394 | // R_POWERPC_ADDR16_HA: ((Symbol + Addend + 0x8000) >> 16) & 0xffff |
42cacb20 | 1395 | static inline void |
dd93cd0a AM |
1396 | addr16_ha(unsigned char* view, Address value) |
1397 | { This::addr16_hi(view, value + 0x8000); } | |
42cacb20 | 1398 | |
dd93cd0a | 1399 | // R_POWERPC_ADDR16_HIGHER: ((Symbol + Addend) >> 32) & 0xffff |
42cacb20 | 1400 | static inline void |
dd93cd0a | 1401 | addr16_hi2(unsigned char* view, Address value) |
f4baf0d4 | 1402 | { This::template rela<16>(view, 32, 0xffff, value, CHECK_NONE); } |
42cacb20 | 1403 | |
dd93cd0a | 1404 | // R_POWERPC_ADDR16_HIGHERA: ((Symbol + Addend + 0x8000) >> 32) & 0xffff |
42cacb20 | 1405 | static inline void |
dd93cd0a AM |
1406 | addr16_ha2(unsigned char* view, Address value) |
1407 | { This::addr16_hi2(view, value + 0x8000); } | |
42cacb20 | 1408 | |
dd93cd0a | 1409 | // R_POWERPC_ADDR16_HIGHEST: ((Symbol + Addend) >> 48) & 0xffff |
42cacb20 | 1410 | static inline void |
dd93cd0a | 1411 | addr16_hi3(unsigned char* view, Address value) |
f4baf0d4 | 1412 | { This::template rela<16>(view, 48, 0xffff, value, CHECK_NONE); } |
42cacb20 | 1413 | |
dd93cd0a | 1414 | // R_POWERPC_ADDR16_HIGHESTA: ((Symbol + Addend + 0x8000) >> 48) & 0xffff |
42cacb20 | 1415 | static inline void |
dd93cd0a AM |
1416 | addr16_ha3(unsigned char* view, Address value) |
1417 | { This::addr16_hi3(view, value + 0x8000); } | |
1418 | ||
1419 | // R_POWERPC_ADDR14: (Symbol + Addend) & 0xfffc | |
f4baf0d4 AM |
1420 | static inline Status |
1421 | addr14(unsigned char* view, Address value, Overflow_check overflow) | |
dd93cd0a | 1422 | { |
f4baf0d4 AM |
1423 | Status stat = This::template rela<32>(view, 0, 0xfffc, value, overflow); |
1424 | if (overflow != CHECK_NONE && (value & 3) != 0) | |
1425 | stat = STATUS_OVERFLOW; | |
dd93cd0a AM |
1426 | return stat; |
1427 | } | |
cf43a2fe AM |
1428 | }; |
1429 | ||
c9269dff AM |
1430 | // Stash away the index of .got2 or .opd in a relocatable object, if |
1431 | // such a section exists. | |
cf43a2fe AM |
1432 | |
1433 | template<int size, bool big_endian> | |
1434 | bool | |
1435 | Powerpc_relobj<size, big_endian>::do_find_special_sections( | |
1436 | Read_symbols_data* sd) | |
1437 | { | |
c9269dff AM |
1438 | const unsigned char* const pshdrs = sd->section_headers->data(); |
1439 | const unsigned char* namesu = sd->section_names->data(); | |
1440 | const char* names = reinterpret_cast<const char*>(namesu); | |
1441 | section_size_type names_size = sd->section_names_size; | |
1442 | const unsigned char* s; | |
1443 | ||
1444 | s = this->find_shdr(pshdrs, size == 32 ? ".got2" : ".opd", | |
1445 | names, names_size, NULL); | |
1446 | if (s != NULL) | |
1447 | { | |
1448 | unsigned int ndx = (s - pshdrs) / elfcpp::Elf_sizes<size>::shdr_size; | |
1449 | this->special_ = ndx; | |
1450 | } | |
1451 | return Sized_relobj_file<size, big_endian>::do_find_special_sections(sd); | |
1452 | } | |
1453 | ||
1454 | // Examine .rela.opd to build info about function entry points. | |
1455 | ||
1456 | template<int size, bool big_endian> | |
1457 | void | |
1458 | Powerpc_relobj<size, big_endian>::scan_opd_relocs( | |
1459 | size_t reloc_count, | |
1460 | const unsigned char* prelocs, | |
1461 | const unsigned char* plocal_syms) | |
1462 | { | |
1463 | if (size == 64) | |
cf43a2fe | 1464 | { |
c9269dff AM |
1465 | typedef typename Reloc_types<elfcpp::SHT_RELA, size, big_endian>::Reloc |
1466 | Reltype; | |
1467 | const int reloc_size | |
1468 | = Reloc_types<elfcpp::SHT_RELA, size, big_endian>::reloc_size; | |
1469 | const int sym_size = elfcpp::Elf_sizes<size>::sym_size; | |
ec4dbad3 AM |
1470 | Address expected_off = 0; |
1471 | bool regular = true; | |
1472 | unsigned int opd_ent_size = 0; | |
c9269dff AM |
1473 | |
1474 | for (size_t i = 0; i < reloc_count; ++i, prelocs += reloc_size) | |
cf43a2fe | 1475 | { |
c9269dff AM |
1476 | Reltype reloc(prelocs); |
1477 | typename elfcpp::Elf_types<size>::Elf_WXword r_info | |
1478 | = reloc.get_r_info(); | |
1479 | unsigned int r_type = elfcpp::elf_r_type<size>(r_info); | |
1480 | if (r_type == elfcpp::R_PPC64_ADDR64) | |
1481 | { | |
1482 | unsigned int r_sym = elfcpp::elf_r_sym<size>(r_info); | |
1483 | typename elfcpp::Elf_types<size>::Elf_Addr value; | |
1484 | bool is_ordinary; | |
1485 | unsigned int shndx; | |
1486 | if (r_sym < this->local_symbol_count()) | |
1487 | { | |
1488 | typename elfcpp::Sym<size, big_endian> | |
1489 | lsym(plocal_syms + r_sym * sym_size); | |
1490 | shndx = lsym.get_st_shndx(); | |
1491 | shndx = this->adjust_sym_shndx(r_sym, shndx, &is_ordinary); | |
1492 | value = lsym.get_st_value(); | |
1493 | } | |
1494 | else | |
1495 | shndx = this->symbol_section_and_value(r_sym, &value, | |
1496 | &is_ordinary); | |
1497 | this->set_opd_ent(reloc.get_r_offset(), shndx, | |
1498 | value + reloc.get_r_addend()); | |
ec4dbad3 AM |
1499 | if (i == 2) |
1500 | { | |
1501 | expected_off = reloc.get_r_offset(); | |
1502 | opd_ent_size = expected_off; | |
1503 | } | |
1504 | else if (expected_off != reloc.get_r_offset()) | |
1505 | regular = false; | |
1506 | expected_off += opd_ent_size; | |
1507 | } | |
1508 | else if (r_type == elfcpp::R_PPC64_TOC) | |
1509 | { | |
1510 | if (expected_off - opd_ent_size + 8 != reloc.get_r_offset()) | |
1511 | regular = false; | |
1512 | } | |
1513 | else | |
1514 | { | |
1515 | gold_warning(_("%s: unexpected reloc type %u in .opd section"), | |
1516 | this->name().c_str(), r_type); | |
1517 | regular = false; | |
c9269dff AM |
1518 | } |
1519 | } | |
ec4dbad3 AM |
1520 | if (reloc_count <= 2) |
1521 | opd_ent_size = this->section_size(this->opd_shndx()); | |
1522 | if (opd_ent_size != 24 && opd_ent_size != 16) | |
1523 | regular = false; | |
1524 | if (!regular) | |
1525 | { | |
1526 | gold_warning(_("%s: .opd is not a regular array of opd entries"), | |
1527 | this->name().c_str()); | |
1528 | opd_ent_size = 0; | |
1529 | } | |
c9269dff AM |
1530 | } |
1531 | } | |
1532 | ||
1533 | template<int size, bool big_endian> | |
1534 | void | |
1535 | Powerpc_relobj<size, big_endian>::do_read_relocs(Read_relocs_data* rd) | |
1536 | { | |
1537 | Sized_relobj_file<size, big_endian>::do_read_relocs(rd); | |
1538 | if (size == 64) | |
1539 | { | |
1540 | for (Read_relocs_data::Relocs_list::iterator p = rd->relocs.begin(); | |
1541 | p != rd->relocs.end(); | |
1542 | ++p) | |
1543 | { | |
1544 | if (p->data_shndx == this->opd_shndx()) | |
1545 | { | |
ec4dbad3 AM |
1546 | uint64_t opd_size = this->section_size(this->opd_shndx()); |
1547 | gold_assert(opd_size == static_cast<size_t>(opd_size)); | |
1548 | if (opd_size != 0) | |
1549 | { | |
1550 | this->init_opd(opd_size); | |
1551 | this->scan_opd_relocs(p->reloc_count, p->contents->data(), | |
1552 | rd->local_symbols->data()); | |
1553 | } | |
c9269dff AM |
1554 | break; |
1555 | } | |
cf43a2fe AM |
1556 | } |
1557 | } | |
cf43a2fe AM |
1558 | } |
1559 | ||
f43ba157 | 1560 | // Set up some symbols. |
26a4e9cb AM |
1561 | |
1562 | template<int size, bool big_endian> | |
1563 | void | |
f43ba157 AM |
1564 | Target_powerpc<size, big_endian>::do_define_standard_symbols( |
1565 | Symbol_table* symtab, | |
1566 | Layout* layout) | |
26a4e9cb AM |
1567 | { |
1568 | if (size == 32) | |
1569 | { | |
bb66a627 AM |
1570 | // Define _GLOBAL_OFFSET_TABLE_ to ensure it isn't seen as |
1571 | // undefined when scanning relocs (and thus requires | |
26a4e9cb AM |
1572 | // non-relative dynamic relocs). The proper value will be |
1573 | // updated later. | |
1574 | Symbol *gotsym = symtab->lookup("_GLOBAL_OFFSET_TABLE_", NULL); | |
1575 | if (gotsym != NULL && gotsym->is_undefined()) | |
1576 | { | |
1577 | Target_powerpc<size, big_endian>* target = | |
1578 | static_cast<Target_powerpc<size, big_endian>*>( | |
1579 | parameters->sized_target<size, big_endian>()); | |
1580 | Output_data_got_powerpc<size, big_endian>* got | |
1581 | = target->got_section(symtab, layout); | |
1582 | symtab->define_in_output_data("_GLOBAL_OFFSET_TABLE_", NULL, | |
1583 | Symbol_table::PREDEFINED, | |
1584 | got, 0, 0, | |
1585 | elfcpp::STT_OBJECT, | |
bb66a627 | 1586 | elfcpp::STB_LOCAL, |
26a4e9cb AM |
1587 | elfcpp::STV_HIDDEN, 0, |
1588 | false, false); | |
1589 | } | |
1590 | ||
1591 | // Define _SDA_BASE_ at the start of the .sdata section + 32768. | |
1592 | Symbol *sdasym = symtab->lookup("_SDA_BASE_", NULL); | |
1593 | if (sdasym != NULL && sdasym->is_undefined()) | |
1594 | { | |
1595 | Output_data_space* sdata = new Output_data_space(4, "** sdata"); | |
1596 | Output_section* os | |
1597 | = layout->add_output_section_data(".sdata", 0, | |
1598 | elfcpp::SHF_ALLOC | |
1599 | | elfcpp::SHF_WRITE, | |
1600 | sdata, ORDER_SMALL_DATA, false); | |
1601 | symtab->define_in_output_data("_SDA_BASE_", NULL, | |
1602 | Symbol_table::PREDEFINED, | |
1603 | os, 32768, 0, elfcpp::STT_OBJECT, | |
1604 | elfcpp::STB_LOCAL, elfcpp::STV_HIDDEN, | |
1605 | 0, false, false); | |
1606 | } | |
1607 | } | |
26a4e9cb AM |
1608 | } |
1609 | ||
cf43a2fe AM |
1610 | // Set up PowerPC target specific relobj. |
1611 | ||
1612 | template<int size, bool big_endian> | |
1613 | Object* | |
1614 | Target_powerpc<size, big_endian>::do_make_elf_object( | |
1615 | const std::string& name, | |
1616 | Input_file* input_file, | |
1617 | off_t offset, const elfcpp::Ehdr<size, big_endian>& ehdr) | |
1618 | { | |
1619 | int et = ehdr.get_e_type(); | |
957564c9 AS |
1620 | // ET_EXEC files are valid input for --just-symbols/-R, |
1621 | // and we treat them as relocatable objects. | |
1622 | if (et == elfcpp::ET_REL | |
1623 | || (et == elfcpp::ET_EXEC && input_file->just_symbols())) | |
cf43a2fe AM |
1624 | { |
1625 | Powerpc_relobj<size, big_endian>* obj = | |
c9269dff | 1626 | new Powerpc_relobj<size, big_endian>(name, input_file, offset, ehdr); |
cf43a2fe AM |
1627 | obj->setup(); |
1628 | return obj; | |
1629 | } | |
1630 | else if (et == elfcpp::ET_DYN) | |
1631 | { | |
1632 | Sized_dynobj<size, big_endian>* obj = | |
c9269dff | 1633 | new Sized_dynobj<size, big_endian>(name, input_file, offset, ehdr); |
cf43a2fe AM |
1634 | obj->setup(); |
1635 | return obj; | |
1636 | } | |
1637 | else | |
1638 | { | |
c9269dff | 1639 | gold_error(_("%s: unsupported ELF file type %d"), name.c_str(), et); |
cf43a2fe AM |
1640 | return NULL; |
1641 | } | |
1642 | } | |
1643 | ||
1644 | template<int size, bool big_endian> | |
1645 | class Output_data_got_powerpc : public Output_data_got<size, big_endian> | |
1646 | { | |
1647 | public: | |
1648 | typedef typename elfcpp::Elf_types<size>::Elf_Addr Valtype; | |
1649 | typedef Output_data_reloc<elfcpp::SHT_RELA, true, size, big_endian> Rela_dyn; | |
1650 | ||
1651 | Output_data_got_powerpc(Symbol_table* symtab, Layout* layout) | |
1652 | : Output_data_got<size, big_endian>(), | |
1653 | symtab_(symtab), layout_(layout), | |
1654 | header_ent_cnt_(size == 32 ? 3 : 1), | |
1655 | header_index_(size == 32 ? 0x2000 : 0) | |
9e69ed50 | 1656 | { } |
cf43a2fe AM |
1657 | |
1658 | class Got_entry; | |
1659 | ||
1660 | // Create a new GOT entry and return its offset. | |
1661 | unsigned int | |
1662 | add_got_entry(Got_entry got_entry) | |
42cacb20 | 1663 | { |
cf43a2fe AM |
1664 | this->reserve_ent(); |
1665 | return Output_data_got<size, big_endian>::add_got_entry(got_entry); | |
1666 | } | |
42cacb20 | 1667 | |
cf43a2fe AM |
1668 | // Create a pair of new GOT entries and return the offset of the first. |
1669 | unsigned int | |
1670 | add_got_entry_pair(Got_entry got_entry_1, Got_entry got_entry_2) | |
1671 | { | |
1672 | this->reserve_ent(2); | |
1673 | return Output_data_got<size, big_endian>::add_got_entry_pair(got_entry_1, | |
1674 | got_entry_2); | |
1675 | } | |
42cacb20 | 1676 | |
dd93cd0a AM |
1677 | unsigned int |
1678 | add_constant_pair(Valtype c1, Valtype c2) | |
1679 | { | |
1680 | this->reserve_ent(2); | |
1681 | unsigned int got_offset = this->add_constant(c1); | |
1682 | this->add_constant(c2); | |
1683 | return got_offset; | |
1684 | } | |
1685 | ||
1686 | // Offset of _GLOBAL_OFFSET_TABLE_. | |
cf43a2fe AM |
1687 | unsigned int |
1688 | g_o_t() const | |
1689 | { | |
1690 | return this->got_offset(this->header_index_); | |
42cacb20 | 1691 | } |
cf43a2fe | 1692 | |
dd93cd0a AM |
1693 | // Offset of base used to access the GOT/TOC. |
1694 | // The got/toc pointer reg will be set to this value. | |
26a4e9cb | 1695 | Valtype |
dd93cd0a AM |
1696 | got_base_offset(const Powerpc_relobj<size, big_endian>* object) const |
1697 | { | |
1698 | if (size == 32) | |
1699 | return this->g_o_t(); | |
1700 | else | |
1701 | return (this->output_section()->address() | |
1702 | + object->toc_base_offset() | |
1703 | - this->address()); | |
1704 | } | |
1705 | ||
cf43a2fe AM |
1706 | // Ensure our GOT has a header. |
1707 | void | |
1708 | set_final_data_size() | |
1709 | { | |
1710 | if (this->header_ent_cnt_ != 0) | |
1711 | this->make_header(); | |
1712 | Output_data_got<size, big_endian>::set_final_data_size(); | |
1713 | } | |
1714 | ||
1715 | // First word of GOT header needs some values that are not | |
1716 | // handled by Output_data_got so poke them in here. | |
1717 | // For 32-bit, address of .dynamic, for 64-bit, address of TOCbase. | |
1718 | void | |
1719 | do_write(Output_file* of) | |
1720 | { | |
c9824451 AM |
1721 | Valtype val = 0; |
1722 | if (size == 32 && this->layout_->dynamic_data() != NULL) | |
1723 | val = this->layout_->dynamic_section()->address(); | |
1724 | if (size == 64) | |
1725 | val = this->output_section()->address() + 0x8000; | |
1726 | this->replace_constant(this->header_index_, val); | |
cf43a2fe AM |
1727 | Output_data_got<size, big_endian>::do_write(of); |
1728 | } | |
1729 | ||
1730 | private: | |
1731 | void | |
1732 | reserve_ent(unsigned int cnt = 1) | |
1733 | { | |
1734 | if (this->header_ent_cnt_ == 0) | |
1735 | return; | |
1736 | if (this->num_entries() + cnt > this->header_index_) | |
1737 | this->make_header(); | |
1738 | } | |
1739 | ||
1740 | void | |
1741 | make_header() | |
1742 | { | |
1743 | this->header_ent_cnt_ = 0; | |
1744 | this->header_index_ = this->num_entries(); | |
1745 | if (size == 32) | |
1746 | { | |
1747 | Output_data_got<size, big_endian>::add_constant(0); | |
1748 | Output_data_got<size, big_endian>::add_constant(0); | |
1749 | Output_data_got<size, big_endian>::add_constant(0); | |
1750 | ||
1751 | // Define _GLOBAL_OFFSET_TABLE_ at the header | |
bb66a627 AM |
1752 | Symbol *gotsym = this->symtab_->lookup("_GLOBAL_OFFSET_TABLE_", NULL); |
1753 | if (gotsym != NULL) | |
1754 | { | |
1755 | Sized_symbol<size>* sym = static_cast<Sized_symbol<size>*>(gotsym); | |
1756 | sym->set_value(this->g_o_t()); | |
1757 | } | |
1758 | else | |
1759 | this->symtab_->define_in_output_data("_GLOBAL_OFFSET_TABLE_", NULL, | |
1760 | Symbol_table::PREDEFINED, | |
1761 | this, this->g_o_t(), 0, | |
1762 | elfcpp::STT_OBJECT, | |
1763 | elfcpp::STB_LOCAL, | |
1764 | elfcpp::STV_HIDDEN, 0, | |
1765 | false, false); | |
cf43a2fe AM |
1766 | } |
1767 | else | |
1768 | Output_data_got<size, big_endian>::add_constant(0); | |
1769 | } | |
1770 | ||
1771 | // Stashed pointers. | |
1772 | Symbol_table* symtab_; | |
1773 | Layout* layout_; | |
1774 | ||
1775 | // GOT header size. | |
1776 | unsigned int header_ent_cnt_; | |
1777 | // GOT header index. | |
1778 | unsigned int header_index_; | |
42cacb20 DE |
1779 | }; |
1780 | ||
1781 | // Get the GOT section, creating it if necessary. | |
1782 | ||
1783 | template<int size, bool big_endian> | |
cf43a2fe | 1784 | Output_data_got_powerpc<size, big_endian>* |
42cacb20 DE |
1785 | Target_powerpc<size, big_endian>::got_section(Symbol_table* symtab, |
1786 | Layout* layout) | |
1787 | { | |
1788 | if (this->got_ == NULL) | |
1789 | { | |
1790 | gold_assert(symtab != NULL && layout != NULL); | |
1791 | ||
cf43a2fe AM |
1792 | this->got_ |
1793 | = new Output_data_got_powerpc<size, big_endian>(symtab, layout); | |
42cacb20 DE |
1794 | |
1795 | layout->add_output_section_data(".got", elfcpp::SHT_PROGBITS, | |
1796 | elfcpp::SHF_ALLOC | elfcpp::SHF_WRITE, | |
22f0da72 | 1797 | this->got_, ORDER_DATA, false); |
42cacb20 DE |
1798 | } |
1799 | ||
1800 | return this->got_; | |
1801 | } | |
1802 | ||
1803 | // Get the dynamic reloc section, creating it if necessary. | |
1804 | ||
1805 | template<int size, bool big_endian> | |
1806 | typename Target_powerpc<size, big_endian>::Reloc_section* | |
1807 | Target_powerpc<size, big_endian>::rela_dyn_section(Layout* layout) | |
1808 | { | |
1809 | if (this->rela_dyn_ == NULL) | |
1810 | { | |
1811 | gold_assert(layout != NULL); | |
1812 | this->rela_dyn_ = new Reloc_section(parameters->options().combreloc()); | |
1813 | layout->add_output_section_data(".rela.dyn", elfcpp::SHT_RELA, | |
22f0da72 ILT |
1814 | elfcpp::SHF_ALLOC, this->rela_dyn_, |
1815 | ORDER_DYNAMIC_RELOCS, false); | |
42cacb20 DE |
1816 | } |
1817 | return this->rela_dyn_; | |
1818 | } | |
1819 | ||
ec661b9d AM |
1820 | class Stub_control |
1821 | { | |
1822 | public: | |
1823 | // Determine the stub group size. The group size is the absolute | |
1824 | // value of the parameter --stub-group-size. If --stub-group-size | |
1825 | // is passed a negative value, we restrict stubs to be always before | |
1826 | // the stubbed branches. | |
1827 | Stub_control(int32_t size) | |
1828 | : state_(NO_GROUP), stub_group_size_(abs(size)), | |
1829 | stub14_group_size_(abs(size)), | |
1830 | stubs_always_before_branch_(size < 0), suppress_size_errors_(false), | |
1831 | group_end_addr_(0), owner_(NULL), output_section_(NULL) | |
1832 | { | |
1833 | if (stub_group_size_ == 1) | |
1834 | { | |
1835 | // Default values. | |
1836 | if (stubs_always_before_branch_) | |
1837 | { | |
1838 | stub_group_size_ = 0x1e00000; | |
1839 | stub14_group_size_ = 0x7800; | |
1840 | } | |
1841 | else | |
1842 | { | |
1843 | stub_group_size_ = 0x1c00000; | |
1844 | stub14_group_size_ = 0x7000; | |
1845 | } | |
1846 | suppress_size_errors_ = true; | |
1847 | } | |
1848 | } | |
1849 | ||
1850 | // Return true iff input section can be handled by current stub | |
1851 | // group. | |
1852 | bool | |
1853 | can_add_to_stub_group(Output_section* o, | |
1854 | const Output_section::Input_section* i, | |
1855 | bool has14); | |
1856 | ||
1857 | const Output_section::Input_section* | |
1858 | owner() | |
1859 | { return owner_; } | |
1860 | ||
1861 | Output_section* | |
1862 | output_section() | |
1863 | { return output_section_; } | |
1864 | ||
1865 | private: | |
1866 | typedef enum | |
1867 | { | |
1868 | NO_GROUP, | |
1869 | FINDING_STUB_SECTION, | |
1870 | HAS_STUB_SECTION | |
1871 | } State; | |
1872 | ||
1873 | State state_; | |
1874 | uint32_t stub_group_size_; | |
1875 | uint32_t stub14_group_size_; | |
1876 | bool stubs_always_before_branch_; | |
1877 | bool suppress_size_errors_; | |
1878 | uint64_t group_end_addr_; | |
1879 | const Output_section::Input_section* owner_; | |
1880 | Output_section* output_section_; | |
1881 | }; | |
1882 | ||
1883 | // Return true iff input section can be handled by current stub/ | |
1884 | // group. | |
1885 | ||
1886 | bool | |
1887 | Stub_control::can_add_to_stub_group(Output_section* o, | |
1888 | const Output_section::Input_section* i, | |
1889 | bool has14) | |
1890 | { | |
1891 | uint32_t group_size | |
1892 | = has14 ? this->stub14_group_size_ : this->stub_group_size_; | |
1893 | bool whole_sec = o->order() == ORDER_INIT || o->order() == ORDER_FINI; | |
1894 | uint64_t this_size; | |
1895 | uint64_t start_addr = o->address(); | |
1896 | ||
1897 | if (whole_sec) | |
1898 | // .init and .fini sections are pasted together to form a single | |
1899 | // function. We can't be adding stubs in the middle of the function. | |
1900 | this_size = o->data_size(); | |
1901 | else | |
1902 | { | |
1903 | start_addr += i->relobj()->output_section_offset(i->shndx()); | |
1904 | this_size = i->data_size(); | |
1905 | } | |
1906 | uint64_t end_addr = start_addr + this_size; | |
1907 | bool toobig = this_size > group_size; | |
1908 | ||
1909 | if (toobig && !this->suppress_size_errors_) | |
1910 | gold_warning(_("%s:%s exceeds group size"), | |
1911 | i->relobj()->name().c_str(), | |
1912 | i->relobj()->section_name(i->shndx()).c_str()); | |
1913 | ||
1914 | if (this->state_ != HAS_STUB_SECTION | |
1915 | && (!whole_sec || this->output_section_ != o)) | |
1916 | { | |
1917 | this->owner_ = i; | |
1918 | this->output_section_ = o; | |
1919 | } | |
1920 | ||
1921 | if (this->state_ == NO_GROUP) | |
1922 | { | |
1923 | this->state_ = FINDING_STUB_SECTION; | |
1924 | this->group_end_addr_ = end_addr; | |
1925 | } | |
1926 | else if (this->group_end_addr_ - start_addr < group_size) | |
1927 | ; | |
1928 | // Adding this section would make the group larger than GROUP_SIZE. | |
1929 | else if (this->state_ == FINDING_STUB_SECTION | |
1930 | && !this->stubs_always_before_branch_ | |
1931 | && !toobig) | |
1932 | { | |
1933 | // But wait, there's more! Input sections up to GROUP_SIZE | |
1934 | // bytes before the stub table can be handled by it too. | |
1935 | this->state_ = HAS_STUB_SECTION; | |
1936 | this->group_end_addr_ = end_addr; | |
1937 | } | |
1938 | else | |
1939 | { | |
1940 | this->state_ = NO_GROUP; | |
1941 | return false; | |
1942 | } | |
1943 | return true; | |
1944 | } | |
1945 | ||
1946 | // Look over all the input sections, deciding where to place stubs. | |
1947 | ||
1948 | template<int size, bool big_endian> | |
1949 | void | |
1950 | Target_powerpc<size, big_endian>::group_sections(Layout* layout, | |
1951 | const Task*) | |
1952 | { | |
1953 | Stub_control stub_control(parameters->options().stub_group_size()); | |
1954 | ||
1955 | // Group input sections and insert stub table | |
1956 | Stub_table<size, big_endian>* stub_table = NULL; | |
1957 | Layout::Section_list section_list; | |
1958 | layout->get_executable_sections(§ion_list); | |
1959 | std::stable_sort(section_list.begin(), section_list.end(), Sort_sections()); | |
1960 | for (Layout::Section_list::reverse_iterator o = section_list.rbegin(); | |
1961 | o != section_list.rend(); | |
1962 | ++o) | |
1963 | { | |
1964 | typedef Output_section::Input_section_list Input_section_list; | |
1965 | for (Input_section_list::const_reverse_iterator i | |
1966 | = (*o)->input_sections().rbegin(); | |
1967 | i != (*o)->input_sections().rend(); | |
1968 | ++i) | |
1969 | { | |
1970 | if (i->is_input_section()) | |
1971 | { | |
1972 | Powerpc_relobj<size, big_endian>* ppcobj = static_cast | |
1973 | <Powerpc_relobj<size, big_endian>*>(i->relobj()); | |
1974 | bool has14 = ppcobj->has_14bit_branch(i->shndx()); | |
1975 | if (!stub_control.can_add_to_stub_group(*o, &*i, has14)) | |
1976 | { | |
1977 | stub_table->init(stub_control.owner(), | |
1978 | stub_control.output_section()); | |
1979 | stub_table = NULL; | |
1980 | } | |
1981 | if (stub_table == NULL) | |
1982 | stub_table = this->new_stub_table(); | |
1983 | ppcobj->set_stub_table(i->shndx(), stub_table); | |
1984 | } | |
1985 | } | |
1986 | } | |
1987 | if (stub_table != NULL) | |
1988 | stub_table->init(stub_control.owner(), stub_control.output_section()); | |
1989 | } | |
1990 | ||
1991 | // If this branch needs a plt call stub, or a long branch stub, make one. | |
1992 | ||
1993 | template<int size, bool big_endian> | |
1994 | void | |
1995 | Target_powerpc<size, big_endian>::Branch_info::make_stub( | |
1996 | Stub_table<size, big_endian>* stub_table, | |
1997 | Stub_table<size, big_endian>* ifunc_stub_table, | |
1998 | Symbol_table* symtab) const | |
1999 | { | |
2000 | Symbol* sym = this->object_->global_symbol(this->r_sym_); | |
2001 | if (sym != NULL && sym->is_forwarder()) | |
2002 | sym = symtab->resolve_forwards(sym); | |
2003 | const Sized_symbol<size>* gsym = static_cast<const Sized_symbol<size>*>(sym); | |
2004 | if (gsym != NULL | |
2005 | ? use_plt_offset<size>(gsym, Scan::get_reference_flags(this->r_type_)) | |
2006 | : this->object_->local_has_plt_offset(this->r_sym_)) | |
2007 | { | |
2008 | if (stub_table == NULL) | |
2009 | stub_table = this->object_->stub_table(this->shndx_); | |
2010 | if (stub_table == NULL) | |
2011 | { | |
2012 | // This is a ref from a data section to an ifunc symbol. | |
2013 | stub_table = ifunc_stub_table; | |
2014 | } | |
2015 | gold_assert(stub_table != NULL); | |
2016 | if (gsym != NULL) | |
2017 | stub_table->add_plt_call_entry(this->object_, gsym, | |
2018 | this->r_type_, this->addend_); | |
2019 | else | |
2020 | stub_table->add_plt_call_entry(this->object_, this->r_sym_, | |
2021 | this->r_type_, this->addend_); | |
2022 | } | |
2023 | else | |
2024 | { | |
2025 | unsigned int max_branch_offset; | |
2026 | if (this->r_type_ == elfcpp::R_POWERPC_REL14 | |
2027 | || this->r_type_ == elfcpp::R_POWERPC_REL14_BRTAKEN | |
2028 | || this->r_type_ == elfcpp::R_POWERPC_REL14_BRNTAKEN) | |
2029 | max_branch_offset = 1 << 15; | |
2030 | else if (this->r_type_ == elfcpp::R_POWERPC_REL24 | |
2031 | || this->r_type_ == elfcpp::R_PPC_PLTREL24 | |
2032 | || this->r_type_ == elfcpp::R_PPC_LOCAL24PC) | |
2033 | max_branch_offset = 1 << 25; | |
2034 | else | |
2035 | return; | |
2036 | Address from = this->object_->get_output_section_offset(this->shndx_); | |
2037 | gold_assert(from != invalid_address); | |
2038 | from += (this->object_->output_section(this->shndx_)->address() | |
2039 | + this->offset_); | |
2040 | Address to; | |
2041 | if (gsym != NULL) | |
2042 | { | |
2043 | switch (gsym->source()) | |
2044 | { | |
2045 | case Symbol::FROM_OBJECT: | |
2046 | { | |
2047 | Object* symobj = gsym->object(); | |
2048 | if (symobj->is_dynamic() | |
2049 | || symobj->pluginobj() != NULL) | |
2050 | return; | |
2051 | bool is_ordinary; | |
2052 | unsigned int shndx = gsym->shndx(&is_ordinary); | |
2053 | if (shndx == elfcpp::SHN_UNDEF) | |
2054 | return; | |
2055 | } | |
2056 | break; | |
2057 | ||
2058 | case Symbol::IS_UNDEFINED: | |
2059 | return; | |
2060 | ||
2061 | default: | |
2062 | break; | |
2063 | } | |
2064 | Symbol_table::Compute_final_value_status status; | |
2065 | to = symtab->compute_final_value<size>(gsym, &status); | |
2066 | if (status != Symbol_table::CFVS_OK) | |
2067 | return; | |
2068 | } | |
2069 | else | |
2070 | { | |
2071 | const Symbol_value<size>* psymval | |
2072 | = this->object_->local_symbol(this->r_sym_); | |
2073 | Symbol_value<size> symval; | |
2074 | typedef Sized_relobj_file<size, big_endian> ObjType; | |
2075 | typename ObjType::Compute_final_local_value_status status | |
2076 | = this->object_->compute_final_local_value(this->r_sym_, psymval, | |
2077 | &symval, symtab); | |
2078 | if (status != ObjType::CFLV_OK | |
2079 | || !symval.has_output_value()) | |
2080 | return; | |
2081 | to = symval.value(this->object_, 0); | |
2082 | } | |
906b9150 | 2083 | to += this->addend_; |
ec661b9d AM |
2084 | if (stub_table == NULL) |
2085 | stub_table = this->object_->stub_table(this->shndx_); | |
2086 | gold_assert(stub_table != NULL); | |
2087 | if (size == 64 && is_branch_reloc(this->r_type_)) | |
2088 | { | |
2089 | unsigned int dest_shndx; | |
2090 | to = stub_table->targ()->symval_for_branch(to, gsym, this->object_, | |
2091 | &dest_shndx); | |
2092 | } | |
2093 | Address delta = to - from; | |
2094 | if (delta + max_branch_offset >= 2 * max_branch_offset) | |
2095 | { | |
2096 | stub_table->add_long_branch_entry(this->object_, to); | |
2097 | } | |
2098 | } | |
2099 | } | |
2100 | ||
2101 | // Relaxation hook. This is where we do stub generation. | |
2102 | ||
2103 | template<int size, bool big_endian> | |
2104 | bool | |
2105 | Target_powerpc<size, big_endian>::do_relax(int pass, | |
2106 | const Input_objects*, | |
2107 | Symbol_table* symtab, | |
2108 | Layout* layout, | |
2109 | const Task* task) | |
2110 | { | |
2111 | unsigned int prev_brlt_size = 0; | |
2112 | if (pass == 1) | |
ec661b9d | 2113 | { |
9e69ed50 AM |
2114 | bool thread_safe = parameters->options().plt_thread_safe(); |
2115 | if (size == 64 && !parameters->options().user_set_plt_thread_safe()) | |
ec661b9d | 2116 | { |
9e69ed50 AM |
2117 | const char* const thread_starter[] = |
2118 | { | |
2119 | "pthread_create", | |
2120 | /* libstdc++ */ | |
2121 | "_ZNSt6thread15_M_start_threadESt10shared_ptrINS_10_Impl_baseEE", | |
2122 | /* librt */ | |
2123 | "aio_init", "aio_read", "aio_write", "aio_fsync", "lio_listio", | |
2124 | "mq_notify", "create_timer", | |
2125 | /* libanl */ | |
2126 | "getaddrinfo_a", | |
2127 | /* libgomp */ | |
2128 | "GOMP_parallel_start", | |
2129 | "GOMP_parallel_loop_static_start", | |
2130 | "GOMP_parallel_loop_dynamic_start", | |
2131 | "GOMP_parallel_loop_guided_start", | |
2132 | "GOMP_parallel_loop_runtime_start", | |
2133 | "GOMP_parallel_sections_start", | |
2134 | }; | |
2135 | ||
2136 | for (unsigned int i = 0; | |
2137 | i < sizeof(thread_starter) / sizeof(thread_starter[0]); | |
2138 | i++) | |
2139 | { | |
2140 | Symbol* sym = symtab->lookup(thread_starter[i], NULL); | |
2141 | thread_safe = sym != NULL && sym->in_reg() && sym->in_real_elf(); | |
2142 | if (thread_safe) | |
2143 | break; | |
2144 | } | |
ec661b9d | 2145 | } |
9e69ed50 AM |
2146 | this->plt_thread_safe_ = thread_safe; |
2147 | this->group_sections(layout, task); | |
ec661b9d AM |
2148 | } |
2149 | ||
2150 | // We need address of stub tables valid for make_stub. | |
2151 | for (typename Stub_tables::iterator p = this->stub_tables_.begin(); | |
2152 | p != this->stub_tables_.end(); | |
2153 | ++p) | |
2154 | { | |
2155 | const Powerpc_relobj<size, big_endian>* object | |
2156 | = static_cast<const Powerpc_relobj<size, big_endian>*>((*p)->relobj()); | |
2157 | Address off = object->get_output_section_offset((*p)->shndx()); | |
2158 | gold_assert(off != invalid_address); | |
2159 | Output_section* os = (*p)->output_section(); | |
2160 | (*p)->set_address_and_size(os, off); | |
2161 | } | |
2162 | ||
9e69ed50 AM |
2163 | if (pass != 1) |
2164 | { | |
2165 | // Clear plt call stubs, long branch stubs and branch lookup table. | |
2166 | prev_brlt_size = this->branch_lookup_table_.size(); | |
2167 | this->branch_lookup_table_.clear(); | |
2168 | for (typename Stub_tables::iterator p = this->stub_tables_.begin(); | |
2169 | p != this->stub_tables_.end(); | |
2170 | ++p) | |
2171 | { | |
2172 | (*p)->clear_stubs(); | |
2173 | } | |
2174 | } | |
2175 | ||
2176 | // Build all the stubs. | |
ec661b9d AM |
2177 | Stub_table<size, big_endian>* ifunc_stub_table |
2178 | = this->stub_tables_.size() == 0 ? NULL : this->stub_tables_[0]; | |
2179 | Stub_table<size, big_endian>* one_stub_table | |
2180 | = this->stub_tables_.size() != 1 ? NULL : ifunc_stub_table; | |
2181 | for (typename Branches::const_iterator b = this->branch_info_.begin(); | |
2182 | b != this->branch_info_.end(); | |
2183 | b++) | |
2184 | { | |
2185 | b->make_stub(one_stub_table, ifunc_stub_table, symtab); | |
2186 | } | |
2187 | ||
9e69ed50 | 2188 | // Did anything change size? |
ec661b9d AM |
2189 | unsigned int num_huge_branches = this->branch_lookup_table_.size(); |
2190 | bool again = num_huge_branches != prev_brlt_size; | |
2191 | if (size == 64 && num_huge_branches != 0) | |
2192 | this->make_brlt_section(layout); | |
2193 | if (size == 64 && again) | |
2194 | this->brlt_section_->set_current_size(num_huge_branches); | |
2195 | ||
2196 | typedef Unordered_set<Output_section*> Output_sections; | |
2197 | Output_sections os_need_update; | |
2198 | for (typename Stub_tables::iterator p = this->stub_tables_.begin(); | |
2199 | p != this->stub_tables_.end(); | |
2200 | ++p) | |
2201 | { | |
2202 | if ((*p)->size_update()) | |
2203 | { | |
2204 | again = true; | |
2205 | os_need_update.insert((*p)->output_section()); | |
2206 | } | |
2207 | } | |
2208 | ||
9e69ed50 AM |
2209 | // Set output section offsets for all input sections in an output |
2210 | // section that just changed size. Anything past the stubs will | |
2211 | // need updating. | |
ec661b9d AM |
2212 | for (typename Output_sections::iterator p = os_need_update.begin(); |
2213 | p != os_need_update.end(); | |
2214 | p++) | |
2215 | { | |
2216 | Output_section* os = *p; | |
2217 | Address off = 0; | |
2218 | typedef Output_section::Input_section_list Input_section_list; | |
2219 | for (Input_section_list::const_iterator i = os->input_sections().begin(); | |
2220 | i != os->input_sections().end(); | |
2221 | ++i) | |
2222 | { | |
2223 | off = align_address(off, i->addralign()); | |
2224 | if (i->is_input_section() || i->is_relaxed_input_section()) | |
2225 | i->relobj()->set_section_offset(i->shndx(), off); | |
2226 | if (i->is_relaxed_input_section()) | |
2227 | { | |
2228 | Stub_table<size, big_endian>* stub_table | |
2229 | = static_cast<Stub_table<size, big_endian>*>( | |
2230 | i->relaxed_input_section()); | |
2231 | off += stub_table->set_address_and_size(os, off); | |
2232 | } | |
2233 | else | |
2234 | off += i->data_size(); | |
2235 | } | |
2236 | // If .brlt is part of this output section, then we have just | |
2237 | // done the offset adjustment. | |
2238 | os->clear_section_offsets_need_adjustment(); | |
2239 | } | |
2240 | ||
2241 | if (size == 64 | |
2242 | && !again | |
2243 | && num_huge_branches != 0 | |
2244 | && parameters->options().output_is_position_independent()) | |
2245 | { | |
2246 | // Fill in the BRLT relocs. | |
2247 | this->brlt_section_->reset_data_size(); | |
2248 | for (typename Branch_lookup_table::const_iterator p | |
2249 | = this->branch_lookup_table_.begin(); | |
2250 | p != this->branch_lookup_table_.end(); | |
2251 | ++p) | |
2252 | { | |
2253 | this->brlt_section_->add_reloc(p->first, p->second); | |
2254 | } | |
2255 | this->brlt_section_->finalize_data_size(); | |
2256 | } | |
2257 | return again; | |
2258 | } | |
2259 | ||
42cacb20 DE |
2260 | // A class to handle the PLT data. |
2261 | ||
2262 | template<int size, bool big_endian> | |
cf43a2fe | 2263 | class Output_data_plt_powerpc : public Output_section_data_build |
42cacb20 DE |
2264 | { |
2265 | public: | |
2266 | typedef Output_data_reloc<elfcpp::SHT_RELA, true, | |
2267 | size, big_endian> Reloc_section; | |
2268 | ||
e5d5f5ed AM |
2269 | Output_data_plt_powerpc(Target_powerpc<size, big_endian>* targ, |
2270 | Reloc_section* plt_rel, | |
2271 | unsigned int reserved_size, | |
2272 | const char* name) | |
2273 | : Output_section_data_build(size == 32 ? 4 : 8), | |
2274 | rel_(plt_rel), | |
2275 | targ_(targ), | |
2276 | initial_plt_entry_size_(reserved_size), | |
2277 | name_(name) | |
2278 | { } | |
42cacb20 DE |
2279 | |
2280 | // Add an entry to the PLT. | |
03e25981 | 2281 | void |
cf43a2fe | 2282 | add_entry(Symbol*); |
42cacb20 | 2283 | |
03e25981 | 2284 | void |
e5d5f5ed AM |
2285 | add_ifunc_entry(Symbol*); |
2286 | ||
03e25981 | 2287 | void |
e5d5f5ed AM |
2288 | add_local_ifunc_entry(Sized_relobj_file<size, big_endian>*, unsigned int); |
2289 | ||
42cacb20 | 2290 | // Return the .rela.plt section data. |
e5d5f5ed | 2291 | Reloc_section* |
cf43a2fe AM |
2292 | rel_plt() const |
2293 | { | |
42cacb20 DE |
2294 | return this->rel_; |
2295 | } | |
2296 | ||
0e70b911 CC |
2297 | // Return the number of PLT entries. |
2298 | unsigned int | |
2299 | entry_count() const | |
d83ce4e3 | 2300 | { |
e5d5f5ed | 2301 | return ((this->current_data_size() - this->initial_plt_entry_size_) |
d83ce4e3 AM |
2302 | / plt_entry_size); |
2303 | } | |
0e70b911 CC |
2304 | |
2305 | // Return the offset of the first non-reserved PLT entry. | |
e5d5f5ed | 2306 | unsigned int |
0e70b911 | 2307 | first_plt_entry_offset() |
e5d5f5ed | 2308 | { return this->initial_plt_entry_size_; } |
0e70b911 CC |
2309 | |
2310 | // Return the size of a PLT entry. | |
2311 | static unsigned int | |
2312 | get_plt_entry_size() | |
cf43a2fe | 2313 | { return plt_entry_size; } |
0e70b911 | 2314 | |
42cacb20 | 2315 | protected: |
42cacb20 | 2316 | void |
cf43a2fe | 2317 | do_adjust_output_section(Output_section* os) |
42cacb20 | 2318 | { |
cf43a2fe | 2319 | os->set_entsize(0); |
42cacb20 DE |
2320 | } |
2321 | ||
6ce78956 AM |
2322 | // Write to a map file. |
2323 | void | |
2324 | do_print_to_mapfile(Mapfile* mapfile) const | |
e5d5f5ed | 2325 | { mapfile->print_output_data(this, this->name_); } |
6ce78956 | 2326 | |
cf43a2fe AM |
2327 | private: |
2328 | // The size of an entry in the PLT. | |
2329 | static const int plt_entry_size = size == 32 ? 4 : 24; | |
cf43a2fe | 2330 | |
42cacb20 DE |
2331 | // Write out the PLT data. |
2332 | void | |
2333 | do_write(Output_file*); | |
2334 | ||
2335 | // The reloc section. | |
2336 | Reloc_section* rel_; | |
cf43a2fe AM |
2337 | // Allows access to .glink for do_write. |
2338 | Target_powerpc<size, big_endian>* targ_; | |
e5d5f5ed AM |
2339 | // The size of the first reserved entry. |
2340 | int initial_plt_entry_size_; | |
2341 | // What to report in map file. | |
2342 | const char *name_; | |
42cacb20 DE |
2343 | }; |
2344 | ||
e5d5f5ed | 2345 | // Add an entry to the PLT. |
42cacb20 DE |
2346 | |
2347 | template<int size, bool big_endian> | |
03e25981 | 2348 | void |
e5d5f5ed | 2349 | Output_data_plt_powerpc<size, big_endian>::add_entry(Symbol* gsym) |
42cacb20 | 2350 | { |
e5d5f5ed AM |
2351 | if (!gsym->has_plt_offset()) |
2352 | { | |
ec661b9d | 2353 | section_size_type off = this->current_data_size(); |
e5d5f5ed AM |
2354 | if (off == 0) |
2355 | off += this->first_plt_entry_offset(); | |
2356 | gsym->set_plt_offset(off); | |
2357 | gsym->set_needs_dynsym_entry(); | |
2358 | unsigned int dynrel = elfcpp::R_POWERPC_JMP_SLOT; | |
2359 | this->rel_->add_global(gsym, dynrel, this, off, 0); | |
2360 | off += plt_entry_size; | |
2361 | this->set_current_data_size(off); | |
2362 | } | |
42cacb20 DE |
2363 | } |
2364 | ||
e5d5f5ed | 2365 | // Add an entry for a global ifunc symbol that resolves locally, to the IPLT. |
42cacb20 DE |
2366 | |
2367 | template<int size, bool big_endian> | |
03e25981 | 2368 | void |
e5d5f5ed | 2369 | Output_data_plt_powerpc<size, big_endian>::add_ifunc_entry(Symbol* gsym) |
42cacb20 | 2370 | { |
cf43a2fe AM |
2371 | if (!gsym->has_plt_offset()) |
2372 | { | |
ec661b9d | 2373 | section_size_type off = this->current_data_size(); |
cf43a2fe | 2374 | gsym->set_plt_offset(off); |
e5d5f5ed AM |
2375 | unsigned int dynrel = elfcpp::R_POWERPC_IRELATIVE; |
2376 | if (size == 64) | |
2377 | dynrel = elfcpp::R_PPC64_JMP_IREL; | |
2378 | this->rel_->add_symbolless_global_addend(gsym, dynrel, this, off, 0); | |
2379 | off += plt_entry_size; | |
2380 | this->set_current_data_size(off); | |
2381 | } | |
2382 | } | |
2383 | ||
2384 | // Add an entry for a local ifunc symbol to the IPLT. | |
2385 | ||
2386 | template<int size, bool big_endian> | |
03e25981 | 2387 | void |
e5d5f5ed AM |
2388 | Output_data_plt_powerpc<size, big_endian>::add_local_ifunc_entry( |
2389 | Sized_relobj_file<size, big_endian>* relobj, | |
2390 | unsigned int local_sym_index) | |
2391 | { | |
2392 | if (!relobj->local_has_plt_offset(local_sym_index)) | |
2393 | { | |
ec661b9d | 2394 | section_size_type off = this->current_data_size(); |
e5d5f5ed AM |
2395 | relobj->set_local_plt_offset(local_sym_index, off); |
2396 | unsigned int dynrel = elfcpp::R_POWERPC_IRELATIVE; | |
2397 | if (size == 64) | |
2398 | dynrel = elfcpp::R_PPC64_JMP_IREL; | |
2399 | this->rel_->add_symbolless_local_addend(relobj, local_sym_index, dynrel, | |
2400 | this, off, 0); | |
cf43a2fe AM |
2401 | off += plt_entry_size; |
2402 | this->set_current_data_size(off); | |
2403 | } | |
42cacb20 DE |
2404 | } |
2405 | ||
dd93cd0a | 2406 | static const uint32_t add_0_11_11 = 0x7c0b5a14; |
9e69ed50 | 2407 | static const uint32_t add_2_2_11 = 0x7c425a14; |
dd93cd0a AM |
2408 | static const uint32_t add_3_3_2 = 0x7c631214; |
2409 | static const uint32_t add_3_3_13 = 0x7c636a14; | |
2410 | static const uint32_t add_11_0_11 = 0x7d605a14; | |
2411 | static const uint32_t add_12_2_11 = 0x7d825a14; | |
9e69ed50 | 2412 | static const uint32_t add_12_12_11 = 0x7d8c5a14; |
dd93cd0a AM |
2413 | static const uint32_t addi_11_11 = 0x396b0000; |
2414 | static const uint32_t addi_12_12 = 0x398c0000; | |
2415 | static const uint32_t addi_2_2 = 0x38420000; | |
2416 | static const uint32_t addi_3_2 = 0x38620000; | |
2417 | static const uint32_t addi_3_3 = 0x38630000; | |
2418 | static const uint32_t addis_0_2 = 0x3c020000; | |
2419 | static const uint32_t addis_0_13 = 0x3c0d0000; | |
c9269dff AM |
2420 | static const uint32_t addis_11_11 = 0x3d6b0000; |
2421 | static const uint32_t addis_11_30 = 0x3d7e0000; | |
2422 | static const uint32_t addis_12_12 = 0x3d8c0000; | |
dd93cd0a AM |
2423 | static const uint32_t addis_12_2 = 0x3d820000; |
2424 | static const uint32_t addis_3_2 = 0x3c620000; | |
2425 | static const uint32_t addis_3_13 = 0x3c6d0000; | |
c9269dff AM |
2426 | static const uint32_t b = 0x48000000; |
2427 | static const uint32_t bcl_20_31 = 0x429f0005; | |
2428 | static const uint32_t bctr = 0x4e800420; | |
f3a0ed29 | 2429 | static const uint32_t blr = 0x4e800020; |
c9269dff | 2430 | static const uint32_t blrl = 0x4e800021; |
9e69ed50 AM |
2431 | static const uint32_t bnectr_p4 = 0x4ce20420; |
2432 | static const uint32_t cmpldi_2_0 = 0x28220000; | |
dd93cd0a AM |
2433 | static const uint32_t cror_15_15_15 = 0x4def7b82; |
2434 | static const uint32_t cror_31_31_31 = 0x4ffffb82; | |
f3a0ed29 AM |
2435 | static const uint32_t ld_0_1 = 0xe8010000; |
2436 | static const uint32_t ld_0_12 = 0xe80c0000; | |
dd93cd0a AM |
2437 | static const uint32_t ld_11_12 = 0xe96c0000; |
2438 | static const uint32_t ld_11_2 = 0xe9620000; | |
2439 | static const uint32_t ld_2_1 = 0xe8410000; | |
2440 | static const uint32_t ld_2_11 = 0xe84b0000; | |
2441 | static const uint32_t ld_2_12 = 0xe84c0000; | |
2442 | static const uint32_t ld_2_2 = 0xe8420000; | |
f3a0ed29 | 2443 | static const uint32_t lfd_0_1 = 0xc8010000; |
dd93cd0a | 2444 | static const uint32_t li_0_0 = 0x38000000; |
f3a0ed29 | 2445 | static const uint32_t li_12_0 = 0x39800000; |
dd93cd0a | 2446 | static const uint32_t lis_0_0 = 0x3c000000; |
c9269dff AM |
2447 | static const uint32_t lis_11 = 0x3d600000; |
2448 | static const uint32_t lis_12 = 0x3d800000; | |
c9269dff AM |
2449 | static const uint32_t lwz_0_12 = 0x800c0000; |
2450 | static const uint32_t lwz_11_11 = 0x816b0000; | |
2451 | static const uint32_t lwz_11_30 = 0x817e0000; | |
2452 | static const uint32_t lwz_12_12 = 0x818c0000; | |
dd93cd0a | 2453 | static const uint32_t lwzu_0_12 = 0x840c0000; |
f3a0ed29 | 2454 | static const uint32_t lvx_0_12_0 = 0x7c0c00ce; |
c9269dff | 2455 | static const uint32_t mflr_0 = 0x7c0802a6; |
dd93cd0a | 2456 | static const uint32_t mflr_11 = 0x7d6802a6; |
c9269dff AM |
2457 | static const uint32_t mflr_12 = 0x7d8802a6; |
2458 | static const uint32_t mtctr_0 = 0x7c0903a6; | |
2459 | static const uint32_t mtctr_11 = 0x7d6903a6; | |
ec661b9d | 2460 | static const uint32_t mtctr_12 = 0x7d8903a6; |
c9269dff | 2461 | static const uint32_t mtlr_0 = 0x7c0803a6; |
c9269dff | 2462 | static const uint32_t mtlr_12 = 0x7d8803a6; |
dd93cd0a | 2463 | static const uint32_t nop = 0x60000000; |
c9269dff | 2464 | static const uint32_t ori_0_0_0 = 0x60000000; |
f3a0ed29 AM |
2465 | static const uint32_t std_0_1 = 0xf8010000; |
2466 | static const uint32_t std_0_12 = 0xf80c0000; | |
dd93cd0a | 2467 | static const uint32_t std_2_1 = 0xf8410000; |
f3a0ed29 AM |
2468 | static const uint32_t stfd_0_1 = 0xd8010000; |
2469 | static const uint32_t stvx_0_12_0 = 0x7c0c01ce; | |
dd93cd0a | 2470 | static const uint32_t sub_11_11_12 = 0x7d6c5850; |
9e69ed50 | 2471 | static const uint32_t xor_11_11_11 = 0x7d6b5a78; |
42cacb20 DE |
2472 | |
2473 | // Write out the PLT. | |
2474 | ||
2475 | template<int size, bool big_endian> | |
2476 | void | |
2477 | Output_data_plt_powerpc<size, big_endian>::do_write(Output_file* of) | |
2478 | { | |
cf43a2fe AM |
2479 | if (size == 32) |
2480 | { | |
ec661b9d | 2481 | const section_size_type offset = this->offset(); |
cf43a2fe AM |
2482 | const section_size_type oview_size |
2483 | = convert_to_section_size_type(this->data_size()); | |
2484 | unsigned char* const oview = of->get_output_view(offset, oview_size); | |
2485 | unsigned char* pov = oview; | |
2486 | unsigned char* endpov = oview + oview_size; | |
2487 | ||
e5d5f5ed | 2488 | // The address of the .glink branch table |
cf43a2fe AM |
2489 | const Output_data_glink<size, big_endian>* glink |
2490 | = this->targ_->glink_section(); | |
ec661b9d | 2491 | elfcpp::Elf_types<32>::Elf_Addr branch_tab = glink->address(); |
cf43a2fe AM |
2492 | |
2493 | while (pov < endpov) | |
2494 | { | |
2495 | elfcpp::Swap<32, big_endian>::writeval(pov, branch_tab); | |
2496 | pov += 4; | |
2497 | branch_tab += 4; | |
2498 | } | |
2499 | ||
2500 | of->write_output_view(offset, oview_size, oview); | |
2501 | } | |
2502 | } | |
2503 | ||
2504 | // Create the PLT section. | |
2505 | ||
2506 | template<int size, bool big_endian> | |
2507 | void | |
40b469d7 AM |
2508 | Target_powerpc<size, big_endian>::make_plt_section(Symbol_table* symtab, |
2509 | Layout* layout) | |
cf43a2fe AM |
2510 | { |
2511 | if (this->plt_ == NULL) | |
2512 | { | |
40b469d7 AM |
2513 | if (this->got_ == NULL) |
2514 | this->got_section(symtab, layout); | |
2515 | ||
cf43a2fe AM |
2516 | if (this->glink_ == NULL) |
2517 | make_glink_section(layout); | |
2518 | ||
2519 | // Ensure that .rela.dyn always appears before .rela.plt This is | |
2520 | // necessary due to how, on PowerPC and some other targets, .rela.dyn | |
2521 | // needs to include .rela.plt in it's range. | |
2522 | this->rela_dyn_section(layout); | |
2523 | ||
e5d5f5ed AM |
2524 | Reloc_section* plt_rel = new Reloc_section(false); |
2525 | layout->add_output_section_data(".rela.plt", elfcpp::SHT_RELA, | |
2526 | elfcpp::SHF_ALLOC, plt_rel, | |
2527 | ORDER_DYNAMIC_PLT_RELOCS, false); | |
2528 | this->plt_ | |
2529 | = new Output_data_plt_powerpc<size, big_endian>(this, plt_rel, | |
2530 | size == 32 ? 0 : 24, | |
2531 | "** PLT"); | |
cf43a2fe AM |
2532 | layout->add_output_section_data(".plt", |
2533 | (size == 32 | |
2534 | ? elfcpp::SHT_PROGBITS | |
2535 | : elfcpp::SHT_NOBITS), | |
2536 | elfcpp::SHF_ALLOC | elfcpp::SHF_WRITE, | |
2537 | this->plt_, | |
2538 | (size == 32 | |
2539 | ? ORDER_SMALL_DATA | |
2540 | : ORDER_SMALL_BSS), | |
2541 | false); | |
2542 | } | |
2543 | } | |
2544 | ||
e5d5f5ed AM |
2545 | // Create the IPLT section. |
2546 | ||
2547 | template<int size, bool big_endian> | |
2548 | void | |
40b469d7 AM |
2549 | Target_powerpc<size, big_endian>::make_iplt_section(Symbol_table* symtab, |
2550 | Layout* layout) | |
e5d5f5ed AM |
2551 | { |
2552 | if (this->iplt_ == NULL) | |
2553 | { | |
40b469d7 | 2554 | this->make_plt_section(symtab, layout); |
e5d5f5ed AM |
2555 | |
2556 | Reloc_section* iplt_rel = new Reloc_section(false); | |
2557 | this->rela_dyn_->output_section()->add_output_section_data(iplt_rel); | |
2558 | this->iplt_ | |
2559 | = new Output_data_plt_powerpc<size, big_endian>(this, iplt_rel, | |
2560 | 0, "** IPLT"); | |
2561 | this->plt_->output_section()->add_output_section_data(this->iplt_); | |
e5d5f5ed AM |
2562 | } |
2563 | } | |
2564 | ||
ec661b9d | 2565 | // A section for huge long branch addresses, similar to plt section. |
cf43a2fe AM |
2566 | |
2567 | template<int size, bool big_endian> | |
ec661b9d | 2568 | class Output_data_brlt_powerpc : public Output_section_data_build |
cf43a2fe AM |
2569 | { |
2570 | public: | |
ec661b9d AM |
2571 | typedef typename elfcpp::Elf_types<size>::Elf_Addr Address; |
2572 | typedef Output_data_reloc<elfcpp::SHT_RELA, true, | |
2573 | size, big_endian> Reloc_section; | |
c9269dff | 2574 | |
ec661b9d AM |
2575 | Output_data_brlt_powerpc(Target_powerpc<size, big_endian>* targ, |
2576 | Reloc_section* brlt_rel) | |
2577 | : Output_section_data_build(size == 32 ? 4 : 8), | |
2578 | rel_(brlt_rel), | |
2579 | targ_(targ) | |
2580 | { } | |
cf43a2fe | 2581 | |
ec661b9d | 2582 | // Add a reloc for an entry in the BRLT. |
cf43a2fe | 2583 | void |
ec661b9d AM |
2584 | add_reloc(Address to, unsigned int off) |
2585 | { this->rel_->add_relative(elfcpp::R_POWERPC_RELATIVE, this, off, to); } | |
e5d5f5ed | 2586 | |
ec661b9d | 2587 | // Update section and reloc section size. |
e5d5f5ed | 2588 | void |
ec661b9d AM |
2589 | set_current_size(unsigned int num_branches) |
2590 | { | |
2591 | this->reset_address_and_file_offset(); | |
2592 | this->set_current_data_size(num_branches * 16); | |
2593 | this->finalize_data_size(); | |
2594 | Output_section* os = this->output_section(); | |
2595 | os->set_section_offsets_need_adjustment(); | |
2596 | if (this->rel_ != NULL) | |
2597 | { | |
2598 | unsigned int reloc_size | |
2599 | = Reloc_types<elfcpp::SHT_RELA, size, big_endian>::reloc_size; | |
2600 | this->rel_->reset_address_and_file_offset(); | |
2601 | this->rel_->set_current_data_size(num_branches * reloc_size); | |
2602 | this->rel_->finalize_data_size(); | |
2603 | Output_section* os = this->rel_->output_section(); | |
2604 | os->set_section_offsets_need_adjustment(); | |
2605 | } | |
2606 | } | |
cf43a2fe | 2607 | |
ec661b9d AM |
2608 | protected: |
2609 | void | |
2610 | do_adjust_output_section(Output_section* os) | |
2611 | { | |
2612 | os->set_entsize(0); | |
2613 | } | |
e5d5f5ed | 2614 | |
ec661b9d AM |
2615 | // Write to a map file. |
2616 | void | |
2617 | do_print_to_mapfile(Mapfile* mapfile) const | |
2618 | { mapfile->print_output_data(this, "** BRLT"); } | |
c9824451 | 2619 | |
ec661b9d AM |
2620 | private: |
2621 | // Write out the BRLT data. | |
2622 | void | |
2623 | do_write(Output_file*); | |
c9824451 | 2624 | |
ec661b9d AM |
2625 | // The reloc section. |
2626 | Reloc_section* rel_; | |
2627 | Target_powerpc<size, big_endian>* targ_; | |
2628 | }; | |
cf43a2fe | 2629 | |
ec661b9d AM |
2630 | // Make the branch lookup table section. |
2631 | ||
2632 | template<int size, bool big_endian> | |
2633 | void | |
2634 | Target_powerpc<size, big_endian>::make_brlt_section(Layout* layout) | |
2635 | { | |
2636 | if (size == 64 && this->brlt_section_ == NULL) | |
2637 | { | |
2638 | Reloc_section* brlt_rel = NULL; | |
2639 | bool is_pic = parameters->options().output_is_position_independent(); | |
2640 | if (is_pic) | |
2641 | { | |
2642 | // When PIC we can't fill in .brlt (like .plt it can be a | |
2643 | // bss style section) but must initialise at runtime via | |
2644 | // dynamic relocats. | |
2645 | this->rela_dyn_section(layout); | |
2646 | brlt_rel = new Reloc_section(false); | |
2647 | this->rela_dyn_->output_section()->add_output_section_data(brlt_rel); | |
2648 | } | |
2649 | this->brlt_section_ | |
2650 | = new Output_data_brlt_powerpc<size, big_endian>(this, brlt_rel); | |
2651 | if (this->plt_ && is_pic) | |
2652 | this->plt_->output_section() | |
2653 | ->add_output_section_data(this->brlt_section_); | |
2654 | else | |
2655 | layout->add_output_section_data(".brlt", | |
2656 | (is_pic ? elfcpp::SHT_NOBITS | |
2657 | : elfcpp::SHT_PROGBITS), | |
2658 | elfcpp::SHF_ALLOC | elfcpp::SHF_WRITE, | |
2659 | this->brlt_section_, | |
2660 | (is_pic ? ORDER_SMALL_BSS | |
2661 | : ORDER_SMALL_DATA), | |
2662 | false); | |
2663 | } | |
2664 | } | |
2665 | ||
2666 | // Write out .brlt when non-PIC. | |
2667 | ||
2668 | template<int size, bool big_endian> | |
2669 | void | |
2670 | Output_data_brlt_powerpc<size, big_endian>::do_write(Output_file* of) | |
2671 | { | |
2672 | if (size == 64 && !parameters->options().output_is_position_independent()) | |
2673 | { | |
2674 | const section_size_type offset = this->offset(); | |
2675 | const section_size_type oview_size | |
2676 | = convert_to_section_size_type(this->data_size()); | |
2677 | unsigned char* const oview = of->get_output_view(offset, oview_size); | |
2678 | ||
2679 | this->targ_->write_branch_lookup_table(oview); | |
2680 | of->write_output_view(offset, oview_size, oview); | |
2681 | } | |
2682 | } | |
2683 | ||
9e69ed50 AM |
2684 | static inline uint32_t |
2685 | l(uint32_t a) | |
2686 | { | |
2687 | return a & 0xffff; | |
2688 | } | |
2689 | ||
2690 | static inline uint32_t | |
2691 | hi(uint32_t a) | |
2692 | { | |
2693 | return l(a >> 16); | |
2694 | } | |
2695 | ||
2696 | static inline uint32_t | |
2697 | ha(uint32_t a) | |
2698 | { | |
2699 | return hi(a + 0x8000); | |
2700 | } | |
2701 | ||
2702 | template<bool big_endian> | |
2703 | static inline void | |
2704 | write_insn(unsigned char* p, uint32_t v) | |
2705 | { | |
2706 | elfcpp::Swap<32, big_endian>::writeval(p, v); | |
2707 | } | |
2708 | ||
ec661b9d AM |
2709 | // Stub_table holds information about plt and long branch stubs. |
2710 | // Stubs are built in an area following some input section determined | |
2711 | // by group_sections(). This input section is converted to a relaxed | |
2712 | // input section allowing it to be resized to accommodate the stubs | |
2713 | ||
2714 | template<int size, bool big_endian> | |
2715 | class Stub_table : public Output_relaxed_input_section | |
2716 | { | |
2717 | public: | |
2718 | typedef typename elfcpp::Elf_types<size>::Elf_Addr Address; | |
2719 | static const Address invalid_address = static_cast<Address>(0) - 1; | |
2720 | ||
2721 | Stub_table(Target_powerpc<size, big_endian>* targ) | |
2722 | : Output_relaxed_input_section(NULL, 0, 0), | |
2723 | targ_(targ), plt_call_stubs_(), long_branch_stubs_(), | |
9e69ed50 AM |
2724 | orig_data_size_(0), plt_size_(0), last_plt_size_(0), |
2725 | branch_size_(0), last_branch_size_(0) | |
ec661b9d AM |
2726 | { } |
2727 | ||
2728 | // Delayed Output_relaxed_input_section init. | |
2729 | void | |
2730 | init(const Output_section::Input_section*, Output_section*); | |
2731 | ||
2732 | // Add a plt call stub. | |
2733 | void | |
2734 | add_plt_call_entry(const Sized_relobj_file<size, big_endian>*, | |
2735 | const Symbol*, | |
2736 | unsigned int, | |
2737 | Address); | |
2738 | ||
2739 | void | |
2740 | add_plt_call_entry(const Sized_relobj_file<size, big_endian>*, | |
2741 | unsigned int, | |
2742 | unsigned int, | |
2743 | Address); | |
2744 | ||
2745 | // Find a given plt call stub. | |
2746 | Address | |
2747 | find_plt_call_entry(const Symbol*) const; | |
2748 | ||
2749 | Address | |
2750 | find_plt_call_entry(const Sized_relobj_file<size, big_endian>*, | |
2751 | unsigned int) const; | |
2752 | ||
2753 | Address | |
2754 | find_plt_call_entry(const Sized_relobj_file<size, big_endian>*, | |
2755 | const Symbol*, | |
2756 | unsigned int, | |
2757 | Address) const; | |
2758 | ||
2759 | Address | |
2760 | find_plt_call_entry(const Sized_relobj_file<size, big_endian>*, | |
2761 | unsigned int, | |
2762 | unsigned int, | |
2763 | Address) const; | |
2764 | ||
2765 | // Add a long branch stub. | |
2766 | void | |
2767 | add_long_branch_entry(const Powerpc_relobj<size, big_endian>*, Address); | |
2768 | ||
2769 | Address | |
2770 | find_long_branch_entry(const Powerpc_relobj<size, big_endian>*, Address); | |
2771 | ||
2772 | void | |
9e69ed50 | 2773 | clear_stubs() |
cf43a2fe | 2774 | { |
9e69ed50 AM |
2775 | this->plt_call_stubs_.clear(); |
2776 | this->plt_size_ = 0; | |
ec661b9d AM |
2777 | this->long_branch_stubs_.clear(); |
2778 | this->branch_size_ = 0; | |
cf43a2fe AM |
2779 | } |
2780 | ||
ec661b9d AM |
2781 | Address |
2782 | set_address_and_size(const Output_section* os, Address off) | |
cf43a2fe | 2783 | { |
ec661b9d AM |
2784 | Address start_off = off; |
2785 | off += this->orig_data_size_; | |
2786 | Address my_size = this->plt_size_ + this->branch_size_; | |
2787 | if (my_size != 0) | |
2788 | off = align_address(off, this->stub_align()); | |
2789 | // Include original section size and alignment padding in size | |
2790 | my_size += off - start_off; | |
2791 | this->reset_address_and_file_offset(); | |
2792 | this->set_current_data_size(my_size); | |
2793 | this->set_address_and_file_offset(os->address() + start_off, | |
2794 | os->offset() + start_off); | |
2795 | return my_size; | |
cf43a2fe AM |
2796 | } |
2797 | ||
ec661b9d AM |
2798 | Address |
2799 | stub_address() | |
2800 | { | |
2801 | return align_address(this->address() + this->orig_data_size_, | |
2802 | this->stub_align()); | |
2803 | } | |
2804 | ||
2805 | Address | |
2806 | stub_offset() | |
2807 | { | |
2808 | return align_address(this->offset() + this->orig_data_size_, | |
2809 | this->stub_align()); | |
2810 | } | |
2811 | ||
2812 | section_size_type | |
2813 | plt_size() const | |
2814 | { return this->plt_size_; } | |
2815 | ||
2816 | bool | |
2817 | size_update() | |
2818 | { | |
2819 | Output_section* os = this->output_section(); | |
2820 | if (os->addralign() < this->stub_align()) | |
2821 | { | |
2822 | os->set_addralign(this->stub_align()); | |
2823 | // FIXME: get rid of the insane checkpointing. | |
2824 | // We can't increase alignment of the input section to which | |
2825 | // stubs are attached; The input section may be .init which | |
2826 | // is pasted together with other .init sections to form a | |
2827 | // function. Aligning might insert zero padding resulting in | |
2828 | // sigill. However we do need to increase alignment of the | |
2829 | // output section so that the align_address() on offset in | |
2830 | // set_address_and_size() adds the same padding as the | |
2831 | // align_address() on address in stub_address(). | |
2832 | // What's more, we need this alignment for the layout done in | |
2833 | // relaxation_loop_body() so that the output section starts at | |
2834 | // a suitably aligned address. | |
2835 | os->checkpoint_set_addralign(this->stub_align()); | |
2836 | } | |
9e69ed50 AM |
2837 | if (this->last_plt_size_ != this->plt_size_ |
2838 | || this->last_branch_size_ != this->branch_size_) | |
ec661b9d | 2839 | { |
9e69ed50 AM |
2840 | this->last_plt_size_ = this->plt_size_; |
2841 | this->last_branch_size_ = this->branch_size_; | |
ec661b9d AM |
2842 | return true; |
2843 | } | |
2844 | return false; | |
2845 | } | |
2846 | ||
ec661b9d AM |
2847 | Target_powerpc<size, big_endian>* |
2848 | targ() const | |
2849 | { return targ_; } | |
6ce78956 | 2850 | |
cf43a2fe | 2851 | private: |
9e69ed50 AM |
2852 | class Plt_stub_ent; |
2853 | class Plt_stub_ent_hash; | |
2854 | typedef Unordered_map<Plt_stub_ent, unsigned int, | |
2855 | Plt_stub_ent_hash> Plt_stub_entries; | |
2856 | ||
2857 | // Alignment of stub section. | |
ec661b9d | 2858 | unsigned int |
9e69ed50 AM |
2859 | stub_align() const |
2860 | { | |
2861 | if (size == 32) | |
2862 | return 16; | |
2863 | unsigned int min_align = 32; | |
2864 | unsigned int user_align = 1 << parameters->options().plt_align(); | |
2865 | return std::max(user_align, min_align); | |
2866 | } | |
cf43a2fe | 2867 | |
9e69ed50 | 2868 | // Size of a given plt call stub. |
ec661b9d | 2869 | unsigned int |
9e69ed50 AM |
2870 | plt_call_size(typename Plt_stub_entries::const_iterator p) const |
2871 | { | |
2872 | if (size == 32) | |
2873 | return 16; | |
2874 | ||
2875 | Address pltaddr = p->second; | |
2876 | if (p->first.sym_ == NULL | |
2877 | || (p->first.sym_->type() == elfcpp::STT_GNU_IFUNC | |
2878 | && p->first.sym_->can_use_relative_reloc(false))) | |
2879 | pltaddr += this->targ_->iplt_section()->address(); | |
2880 | else | |
2881 | pltaddr += this->targ_->plt_section()->address(); | |
2882 | Address tocbase = this->targ_->got_section()->output_section()->address(); | |
2883 | const Powerpc_relobj<size, big_endian>* ppcobj = static_cast | |
2884 | <const Powerpc_relobj<size, big_endian>*>(p->first.object_); | |
2885 | tocbase += ppcobj->toc_base_offset(); | |
2886 | Address off = pltaddr - tocbase; | |
2887 | bool static_chain = parameters->options().plt_static_chain(); | |
2888 | bool thread_safe = this->targ_->plt_thread_safe(); | |
2889 | unsigned int bytes = (4 * 5 | |
2890 | + 4 * static_chain | |
2891 | + 8 * thread_safe | |
2892 | + 4 * (ha(off) != 0) | |
2893 | + 4 * (ha(off + 8 + 8 * static_chain) != ha(off))); | |
2894 | unsigned int align = 1 << parameters->options().plt_align(); | |
2895 | if (align > 1) | |
2896 | bytes = (bytes + align - 1) & -align; | |
2897 | return bytes; | |
2898 | } | |
ec661b9d AM |
2899 | |
2900 | // Return long branch stub size. | |
2901 | unsigned int | |
2902 | branch_stub_size(Address to) | |
2903 | { | |
9e69ed50 AM |
2904 | Address loc |
2905 | = this->stub_address() + this->last_plt_size_ + this->branch_size_; | |
2906 | if (to - loc + (1 << 25) < 2 << 25) | |
ec661b9d AM |
2907 | return 4; |
2908 | if (size == 64 || !parameters->options().output_is_position_independent()) | |
2909 | return 16; | |
2910 | return 32; | |
2911 | } | |
2912 | ||
2913 | // Write out stubs. | |
cf43a2fe AM |
2914 | void |
2915 | do_write(Output_file*); | |
2916 | ||
ec661b9d AM |
2917 | // Plt call stub keys. |
2918 | class Plt_stub_ent | |
cf43a2fe | 2919 | { |
d1a8cabd | 2920 | public: |
ec661b9d | 2921 | Plt_stub_ent(const Symbol* sym) |
c9824451 AM |
2922 | : sym_(sym), object_(0), addend_(0), locsym_(0) |
2923 | { } | |
2924 | ||
ec661b9d AM |
2925 | Plt_stub_ent(const Sized_relobj_file<size, big_endian>* object, |
2926 | unsigned int locsym_index) | |
c9824451 AM |
2927 | : sym_(NULL), object_(object), addend_(0), locsym_(locsym_index) |
2928 | { } | |
2929 | ||
ec661b9d AM |
2930 | Plt_stub_ent(const Sized_relobj_file<size, big_endian>* object, |
2931 | const Symbol* sym, | |
2932 | unsigned int r_type, | |
2933 | Address addend) | |
e5d5f5ed | 2934 | : sym_(sym), object_(0), addend_(0), locsym_(0) |
cf43a2fe AM |
2935 | { |
2936 | if (size != 32) | |
ec661b9d | 2937 | this->addend_ = addend; |
d1a8cabd | 2938 | else if (parameters->options().output_is_position_independent() |
ec661b9d | 2939 | && r_type == elfcpp::R_PPC_PLTREL24) |
cf43a2fe | 2940 | { |
ec661b9d | 2941 | this->addend_ = addend; |
e5d5f5ed | 2942 | if (this->addend_ >= 32768) |
d1a8cabd | 2943 | this->object_ = object; |
cf43a2fe AM |
2944 | } |
2945 | } | |
2946 | ||
ec661b9d AM |
2947 | Plt_stub_ent(const Sized_relobj_file<size, big_endian>* object, |
2948 | unsigned int locsym_index, | |
2949 | unsigned int r_type, | |
2950 | Address addend) | |
e5d5f5ed AM |
2951 | : sym_(NULL), object_(object), addend_(0), locsym_(locsym_index) |
2952 | { | |
2953 | if (size != 32) | |
ec661b9d | 2954 | this->addend_ = addend; |
e5d5f5ed | 2955 | else if (parameters->options().output_is_position_independent() |
ec661b9d AM |
2956 | && r_type == elfcpp::R_PPC_PLTREL24) |
2957 | this->addend_ = addend; | |
e5d5f5ed AM |
2958 | } |
2959 | ||
ec661b9d | 2960 | bool operator==(const Plt_stub_ent& that) const |
cf43a2fe AM |
2961 | { |
2962 | return (this->sym_ == that.sym_ | |
2963 | && this->object_ == that.object_ | |
e5d5f5ed AM |
2964 | && this->addend_ == that.addend_ |
2965 | && this->locsym_ == that.locsym_); | |
cf43a2fe | 2966 | } |
c9269dff AM |
2967 | |
2968 | const Symbol* sym_; | |
e5d5f5ed AM |
2969 | const Sized_relobj_file<size, big_endian>* object_; |
2970 | typename elfcpp::Elf_types<size>::Elf_Addr addend_; | |
2971 | unsigned int locsym_; | |
cf43a2fe AM |
2972 | }; |
2973 | ||
ec661b9d | 2974 | class Plt_stub_ent_hash |
cf43a2fe | 2975 | { |
d1a8cabd | 2976 | public: |
ec661b9d | 2977 | size_t operator()(const Plt_stub_ent& ent) const |
cf43a2fe AM |
2978 | { |
2979 | return (reinterpret_cast<uintptr_t>(ent.sym_) | |
2980 | ^ reinterpret_cast<uintptr_t>(ent.object_) | |
e5d5f5ed AM |
2981 | ^ ent.addend_ |
2982 | ^ ent.locsym_); | |
cf43a2fe | 2983 | } |
ec661b9d AM |
2984 | }; |
2985 | ||
2986 | // Long branch stub keys. | |
2987 | class Branch_stub_ent | |
2988 | { | |
2989 | public: | |
2990 | Branch_stub_ent(const Powerpc_relobj<size, big_endian>* obj, Address to) | |
2991 | : dest_(to), toc_base_off_(0) | |
2992 | { | |
2993 | if (size == 64) | |
2994 | toc_base_off_ = obj->toc_base_offset(); | |
2995 | } | |
2996 | ||
2997 | bool operator==(const Branch_stub_ent& that) const | |
2998 | { | |
2999 | return (this->dest_ == that.dest_ | |
3000 | && (size == 32 | |
3001 | || this->toc_base_off_ == that.toc_base_off_)); | |
3002 | } | |
cf43a2fe | 3003 | |
ec661b9d AM |
3004 | Address dest_; |
3005 | unsigned int toc_base_off_; | |
3006 | }; | |
cf43a2fe | 3007 | |
ec661b9d AM |
3008 | class Branch_stub_ent_hash |
3009 | { | |
3010 | public: | |
3011 | size_t operator()(const Branch_stub_ent& ent) const | |
3012 | { return ent.dest_ ^ ent.toc_base_off_; } | |
3013 | }; | |
cf43a2fe | 3014 | |
ec661b9d | 3015 | // In a sane world this would be a global. |
cf43a2fe | 3016 | Target_powerpc<size, big_endian>* targ_; |
ec661b9d | 3017 | // Map sym/object/addend to stub offset. |
ec661b9d AM |
3018 | Plt_stub_entries plt_call_stubs_; |
3019 | // Map destination address to stub offset. | |
3020 | typedef Unordered_map<Branch_stub_ent, unsigned int, | |
3021 | Branch_stub_ent_hash> Branch_stub_entries; | |
3022 | Branch_stub_entries long_branch_stubs_; | |
3023 | // size of input section | |
3024 | section_size_type orig_data_size_; | |
3025 | // size of stubs | |
9e69ed50 | 3026 | section_size_type plt_size_, last_plt_size_, branch_size_, last_branch_size_; |
cf43a2fe AM |
3027 | }; |
3028 | ||
ec661b9d AM |
3029 | // Make a new stub table, and record. |
3030 | ||
3031 | template<int size, bool big_endian> | |
3032 | Stub_table<size, big_endian>* | |
3033 | Target_powerpc<size, big_endian>::new_stub_table() | |
3034 | { | |
3035 | Stub_table<size, big_endian>* stub_table | |
3036 | = new Stub_table<size, big_endian>(this); | |
3037 | this->stub_tables_.push_back(stub_table); | |
3038 | return stub_table; | |
3039 | } | |
3040 | ||
3041 | // Delayed stub table initialisation, because we create the stub table | |
3042 | // before we know to which section it will be attached. | |
cf43a2fe AM |
3043 | |
3044 | template<int size, bool big_endian> | |
ec661b9d AM |
3045 | void |
3046 | Stub_table<size, big_endian>::init( | |
3047 | const Output_section::Input_section* owner, | |
3048 | Output_section* output_section) | |
cf43a2fe | 3049 | { |
ec661b9d AM |
3050 | this->set_relobj(owner->relobj()); |
3051 | this->set_shndx(owner->shndx()); | |
3052 | this->set_addralign(this->relobj()->section_addralign(this->shndx())); | |
3053 | this->set_output_section(output_section); | |
3054 | this->orig_data_size_ = owner->current_data_size(); | |
3055 | ||
3056 | std::vector<Output_relaxed_input_section*> new_relaxed; | |
3057 | new_relaxed.push_back(this); | |
3058 | output_section->convert_input_sections_to_relaxed_sections(new_relaxed); | |
cf43a2fe AM |
3059 | } |
3060 | ||
ec661b9d | 3061 | // Add a plt call stub, if we do not already have one for this |
d1a8cabd | 3062 | // sym/object/addend combo. |
cf43a2fe AM |
3063 | |
3064 | template<int size, bool big_endian> | |
3065 | void | |
ec661b9d | 3066 | Stub_table<size, big_endian>::add_plt_call_entry( |
c9824451 | 3067 | const Sized_relobj_file<size, big_endian>* object, |
d83ce4e3 | 3068 | const Symbol* gsym, |
ec661b9d AM |
3069 | unsigned int r_type, |
3070 | Address addend) | |
cf43a2fe | 3071 | { |
ec661b9d AM |
3072 | Plt_stub_ent ent(object, gsym, r_type, addend); |
3073 | Address off = this->plt_size_; | |
9e69ed50 AM |
3074 | std::pair<typename Plt_stub_entries::iterator, bool> p |
3075 | = this->plt_call_stubs_.insert(std::make_pair(ent, off)); | |
3076 | if (p.second) | |
3077 | this->plt_size_ = off + this->plt_call_size(p.first); | |
cf43a2fe AM |
3078 | } |
3079 | ||
e5d5f5ed AM |
3080 | template<int size, bool big_endian> |
3081 | void | |
ec661b9d | 3082 | Stub_table<size, big_endian>::add_plt_call_entry( |
c9824451 | 3083 | const Sized_relobj_file<size, big_endian>* object, |
e5d5f5ed | 3084 | unsigned int locsym_index, |
ec661b9d AM |
3085 | unsigned int r_type, |
3086 | Address addend) | |
e5d5f5ed | 3087 | { |
ec661b9d AM |
3088 | Plt_stub_ent ent(object, locsym_index, r_type, addend); |
3089 | Address off = this->plt_size_; | |
9e69ed50 AM |
3090 | std::pair<typename Plt_stub_entries::iterator, bool> p |
3091 | = this->plt_call_stubs_.insert(std::make_pair(ent, off)); | |
3092 | if (p.second) | |
3093 | this->plt_size_ = off + this->plt_call_size(p.first); | |
e5d5f5ed AM |
3094 | } |
3095 | ||
ec661b9d AM |
3096 | // Find a plt call stub. |
3097 | ||
cf43a2fe | 3098 | template<int size, bool big_endian> |
ec661b9d AM |
3099 | typename elfcpp::Elf_types<size>::Elf_Addr |
3100 | Stub_table<size, big_endian>::find_plt_call_entry( | |
c9824451 | 3101 | const Sized_relobj_file<size, big_endian>* object, |
d83ce4e3 | 3102 | const Symbol* gsym, |
ec661b9d AM |
3103 | unsigned int r_type, |
3104 | Address addend) const | |
c9824451 | 3105 | { |
ec661b9d AM |
3106 | Plt_stub_ent ent(object, gsym, r_type, addend); |
3107 | typename Plt_stub_entries::const_iterator p = this->plt_call_stubs_.find(ent); | |
3108 | return p == this->plt_call_stubs_.end() ? invalid_address : p->second; | |
c9824451 AM |
3109 | } |
3110 | ||
3111 | template<int size, bool big_endian> | |
ec661b9d AM |
3112 | typename elfcpp::Elf_types<size>::Elf_Addr |
3113 | Stub_table<size, big_endian>::find_plt_call_entry(const Symbol* gsym) const | |
cf43a2fe | 3114 | { |
ec661b9d AM |
3115 | Plt_stub_ent ent(gsym); |
3116 | typename Plt_stub_entries::const_iterator p = this->plt_call_stubs_.find(ent); | |
3117 | return p == this->plt_call_stubs_.end() ? invalid_address : p->second; | |
cf43a2fe AM |
3118 | } |
3119 | ||
e5d5f5ed | 3120 | template<int size, bool big_endian> |
ec661b9d AM |
3121 | typename elfcpp::Elf_types<size>::Elf_Addr |
3122 | Stub_table<size, big_endian>::find_plt_call_entry( | |
c9824451 | 3123 | const Sized_relobj_file<size, big_endian>* object, |
e5d5f5ed | 3124 | unsigned int locsym_index, |
ec661b9d AM |
3125 | unsigned int r_type, |
3126 | Address addend) const | |
e5d5f5ed | 3127 | { |
ec661b9d AM |
3128 | Plt_stub_ent ent(object, locsym_index, r_type, addend); |
3129 | typename Plt_stub_entries::const_iterator p = this->plt_call_stubs_.find(ent); | |
3130 | return p == this->plt_call_stubs_.end() ? invalid_address : p->second; | |
c9824451 AM |
3131 | } |
3132 | ||
3133 | template<int size, bool big_endian> | |
ec661b9d AM |
3134 | typename elfcpp::Elf_types<size>::Elf_Addr |
3135 | Stub_table<size, big_endian>::find_plt_call_entry( | |
c9824451 AM |
3136 | const Sized_relobj_file<size, big_endian>* object, |
3137 | unsigned int locsym_index) const | |
3138 | { | |
ec661b9d AM |
3139 | Plt_stub_ent ent(object, locsym_index); |
3140 | typename Plt_stub_entries::const_iterator p = this->plt_call_stubs_.find(ent); | |
3141 | return p == this->plt_call_stubs_.end() ? invalid_address : p->second; | |
3142 | } | |
3143 | ||
3144 | // Add a long branch stub if we don't already have one to given | |
3145 | // destination. | |
3146 | ||
3147 | template<int size, bool big_endian> | |
3148 | void | |
3149 | Stub_table<size, big_endian>::add_long_branch_entry( | |
3150 | const Powerpc_relobj<size, big_endian>* object, | |
3151 | Address to) | |
3152 | { | |
3153 | Branch_stub_ent ent(object, to); | |
3154 | Address off = this->branch_size_; | |
3155 | if (this->long_branch_stubs_.insert(std::make_pair(ent, off)).second) | |
3156 | { | |
3157 | unsigned int stub_size = this->branch_stub_size(to); | |
3158 | this->branch_size_ = off + stub_size; | |
3159 | if (size == 64 && stub_size != 4) | |
3160 | this->targ_->add_branch_lookup_table(to); | |
3161 | } | |
3162 | } | |
3163 | ||
3164 | // Find long branch stub. | |
3165 | ||
3166 | template<int size, bool big_endian> | |
3167 | typename elfcpp::Elf_types<size>::Elf_Addr | |
3168 | Stub_table<size, big_endian>::find_long_branch_entry( | |
3169 | const Powerpc_relobj<size, big_endian>* object, | |
3170 | Address to) | |
3171 | { | |
3172 | Branch_stub_ent ent(object, to); | |
3173 | typename Branch_stub_entries::const_iterator p | |
3174 | = this->long_branch_stubs_.find(ent); | |
3175 | return p == this->long_branch_stubs_.end() ? invalid_address : p->second; | |
e5d5f5ed AM |
3176 | } |
3177 | ||
ec661b9d AM |
3178 | // A class to handle .glink. |
3179 | ||
3180 | template<int size, bool big_endian> | |
3181 | class Output_data_glink : public Output_section_data | |
3182 | { | |
3183 | public: | |
3184 | static const int pltresolve_size = 16*4; | |
3185 | ||
3186 | Output_data_glink(Target_powerpc<size, big_endian>* targ) | |
3187 | : Output_section_data(16), targ_(targ) | |
3188 | { } | |
3189 | ||
3190 | protected: | |
3191 | // Write to a map file. | |
3192 | void | |
3193 | do_print_to_mapfile(Mapfile* mapfile) const | |
3194 | { mapfile->print_output_data(this, _("** glink")); } | |
3195 | ||
3196 | private: | |
3197 | void | |
3198 | set_final_data_size(); | |
3199 | ||
3200 | // Write out .glink | |
3201 | void | |
3202 | do_write(Output_file*); | |
3203 | ||
3204 | // Allows access to .got and .plt for do_write. | |
3205 | Target_powerpc<size, big_endian>* targ_; | |
3206 | }; | |
3207 | ||
cf43a2fe AM |
3208 | template<int size, bool big_endian> |
3209 | void | |
3210 | Output_data_glink<size, big_endian>::set_final_data_size() | |
3211 | { | |
ec661b9d AM |
3212 | unsigned int count = this->targ_->plt_entry_count(); |
3213 | section_size_type total = 0; | |
cf43a2fe AM |
3214 | |
3215 | if (count != 0) | |
3216 | { | |
3217 | if (size == 32) | |
3218 | { | |
cf43a2fe AM |
3219 | // space for branch table |
3220 | total += 4 * (count - 1); | |
3221 | ||
3222 | total += -total & 15; | |
3223 | total += this->pltresolve_size; | |
3224 | } | |
3225 | else | |
3226 | { | |
cf43a2fe AM |
3227 | total += this->pltresolve_size; |
3228 | ||
3229 | // space for branch table | |
3230 | total += 8 * count; | |
3231 | if (count > 0x8000) | |
3232 | total += 4 * (count - 0x8000); | |
3233 | } | |
3234 | } | |
3235 | ||
3236 | this->set_data_size(total); | |
3237 | } | |
3238 | ||
ec661b9d | 3239 | // Write out plt and long branch stub code. |
cf43a2fe AM |
3240 | |
3241 | template<int size, bool big_endian> | |
3242 | void | |
ec661b9d | 3243 | Stub_table<size, big_endian>::do_write(Output_file* of) |
cf43a2fe | 3244 | { |
ec661b9d AM |
3245 | if (this->plt_call_stubs_.empty() |
3246 | && this->long_branch_stubs_.empty()) | |
3247 | return; | |
3248 | ||
3249 | const section_size_type start_off = this->offset(); | |
3250 | const section_size_type off = this->stub_offset(); | |
42cacb20 | 3251 | const section_size_type oview_size = |
ec661b9d | 3252 | convert_to_section_size_type(this->data_size() - (off - start_off)); |
cf43a2fe | 3253 | unsigned char* const oview = of->get_output_view(off, oview_size); |
c9269dff | 3254 | unsigned char* p; |
42cacb20 | 3255 | |
cf43a2fe AM |
3256 | if (size == 64) |
3257 | { | |
ec661b9d AM |
3258 | const Output_data_got_powerpc<size, big_endian>* got |
3259 | = this->targ_->got_section(); | |
dd93cd0a | 3260 | Address got_os_addr = got->output_section()->address(); |
c9269dff | 3261 | |
ec661b9d | 3262 | if (!this->plt_call_stubs_.empty()) |
cf43a2fe | 3263 | { |
ec661b9d AM |
3264 | // The base address of the .plt section. |
3265 | Address plt_base = this->targ_->plt_section()->address(); | |
3266 | Address iplt_base = invalid_address; | |
3267 | ||
3268 | // Write out plt call stubs. | |
3269 | typename Plt_stub_entries::const_iterator cs; | |
3270 | for (cs = this->plt_call_stubs_.begin(); | |
3271 | cs != this->plt_call_stubs_.end(); | |
3272 | ++cs) | |
e5d5f5ed | 3273 | { |
9e69ed50 | 3274 | Address pltoff; |
ec661b9d AM |
3275 | bool is_ifunc; |
3276 | const Symbol* gsym = cs->first.sym_; | |
3277 | if (gsym != NULL) | |
3278 | { | |
3279 | is_ifunc = (gsym->type() == elfcpp::STT_GNU_IFUNC | |
3280 | && gsym->can_use_relative_reloc(false)); | |
9e69ed50 | 3281 | pltoff = gsym->plt_offset(); |
ec661b9d AM |
3282 | } |
3283 | else | |
3284 | { | |
3285 | is_ifunc = true; | |
3286 | const Sized_relobj_file<size, big_endian>* relobj | |
3287 | = cs->first.object_; | |
3288 | unsigned int local_sym_index = cs->first.locsym_; | |
9e69ed50 | 3289 | pltoff = relobj->local_plt_offset(local_sym_index); |
ec661b9d | 3290 | } |
9e69ed50 | 3291 | Address plt_addr = pltoff; |
ec661b9d AM |
3292 | if (is_ifunc) |
3293 | { | |
3294 | if (iplt_base == invalid_address) | |
3295 | iplt_base = this->targ_->iplt_section()->address(); | |
3296 | plt_addr += iplt_base; | |
3297 | } | |
3298 | else | |
3299 | plt_addr += plt_base; | |
3300 | const Powerpc_relobj<size, big_endian>* ppcobj = static_cast | |
3301 | <const Powerpc_relobj<size, big_endian>*>(cs->first.object_); | |
3302 | Address got_addr = got_os_addr + ppcobj->toc_base_offset(); | |
9e69ed50 | 3303 | Address off = plt_addr - got_addr; |
ec661b9d | 3304 | |
9e69ed50 | 3305 | if (off + 0x80008000 > 0xffffffff || (off & 7) != 0) |
ec661b9d AM |
3306 | gold_error(_("%s: linkage table error against `%s'"), |
3307 | cs->first.object_->name().c_str(), | |
3308 | cs->first.sym_->demangled_name().c_str()); | |
3309 | ||
9e69ed50 AM |
3310 | bool static_chain = parameters->options().plt_static_chain(); |
3311 | bool thread_safe = this->targ_->plt_thread_safe(); | |
3312 | bool use_fake_dep = false; | |
3313 | Address cmp_branch_off = 0; | |
3314 | if (thread_safe) | |
3315 | { | |
3316 | unsigned int pltindex | |
3317 | = ((pltoff - this->targ_->first_plt_entry_offset()) | |
3318 | / this->targ_->plt_entry_size()); | |
3319 | Address glinkoff | |
3320 | = (this->targ_->glink_section()->pltresolve_size | |
3321 | + pltindex * 8); | |
3322 | if (pltindex > 32768) | |
3323 | glinkoff += (pltindex - 32768) * 4; | |
3324 | Address to | |
3325 | = this->targ_->glink_section()->address() + glinkoff; | |
3326 | Address from | |
3327 | = (this->stub_address() + cs->second + 24 | |
3328 | + 4 * (ha(off) != 0) | |
3329 | + 4 * (ha(off + 8 + 8 * static_chain) != ha(off)) | |
3330 | + 4 * static_chain); | |
3331 | cmp_branch_off = to - from; | |
3332 | use_fake_dep = cmp_branch_off + (1 << 25) >= (1 << 26); | |
3333 | } | |
3334 | ||
ec661b9d | 3335 | p = oview + cs->second; |
9e69ed50 | 3336 | if (ha(off) != 0) |
ec661b9d | 3337 | { |
ec661b9d | 3338 | write_insn<big_endian>(p, std_2_1 + 40), p += 4; |
9e69ed50 AM |
3339 | write_insn<big_endian>(p, addis_12_2 + ha(off)), p += 4; |
3340 | write_insn<big_endian>(p, ld_11_12 + l(off)), p += 4; | |
3341 | if (ha(off + 8 + 8 * static_chain) != ha(off)) | |
ec661b9d | 3342 | { |
9e69ed50 AM |
3343 | write_insn<big_endian>(p, addi_12_12 + l(off)), p += 4; |
3344 | off = 0; | |
ec661b9d AM |
3345 | } |
3346 | write_insn<big_endian>(p, mtctr_11), p += 4; | |
9e69ed50 AM |
3347 | if (use_fake_dep) |
3348 | { | |
3349 | write_insn<big_endian>(p, xor_11_11_11), p += 4; | |
3350 | write_insn<big_endian>(p, add_12_12_11), p += 4; | |
3351 | } | |
3352 | write_insn<big_endian>(p, ld_2_12 + l(off + 8)), p += 4; | |
3353 | if (static_chain) | |
3354 | write_insn<big_endian>(p, ld_11_12 + l(off + 16)), p += 4; | |
ec661b9d AM |
3355 | } |
3356 | else | |
3357 | { | |
3358 | write_insn<big_endian>(p, std_2_1 + 40), p += 4; | |
9e69ed50 AM |
3359 | write_insn<big_endian>(p, ld_11_2 + l(off)), p += 4; |
3360 | if (ha(off + 8 + 8 * static_chain) != ha(off)) | |
ec661b9d | 3361 | { |
9e69ed50 AM |
3362 | write_insn<big_endian>(p, addi_2_2 + l(off)), p += 4; |
3363 | off = 0; | |
ec661b9d AM |
3364 | } |
3365 | write_insn<big_endian>(p, mtctr_11), p += 4; | |
9e69ed50 AM |
3366 | if (use_fake_dep) |
3367 | { | |
3368 | write_insn<big_endian>(p, xor_11_11_11), p += 4; | |
3369 | write_insn<big_endian>(p, add_2_2_11), p += 4; | |
3370 | } | |
3371 | if (static_chain) | |
3372 | write_insn<big_endian>(p, ld_11_2 + l(off + 16)), p += 4; | |
3373 | write_insn<big_endian>(p, ld_2_2 + l(off + 8)), p += 4; | |
ec661b9d | 3374 | } |
9e69ed50 AM |
3375 | if (thread_safe && !use_fake_dep) |
3376 | { | |
3377 | write_insn<big_endian>(p, cmpldi_2_0), p += 4; | |
3378 | write_insn<big_endian>(p, bnectr_p4), p += 4; | |
3379 | write_insn<big_endian>(p, b | (cmp_branch_off & 0x3fffffc)); | |
3380 | } | |
3381 | else | |
3382 | write_insn<big_endian>(p, bctr); | |
e5d5f5ed | 3383 | } |
ec661b9d AM |
3384 | } |
3385 | ||
3386 | // Write out long branch stubs. | |
3387 | typename Branch_stub_entries::const_iterator bs; | |
3388 | for (bs = this->long_branch_stubs_.begin(); | |
3389 | bs != this->long_branch_stubs_.end(); | |
3390 | ++bs) | |
3391 | { | |
3392 | p = oview + this->plt_size_ + bs->second; | |
3393 | Address loc = this->stub_address() + this->plt_size_ + bs->second; | |
3394 | Address delta = bs->first.dest_ - loc; | |
3395 | if (delta + (1 << 25) < 2 << 25) | |
3396 | write_insn<big_endian>(p, b | (delta & 0x3fffffc)); | |
e5d5f5ed | 3397 | else |
cf43a2fe | 3398 | { |
ec661b9d AM |
3399 | Address brlt_addr |
3400 | = this->targ_->find_branch_lookup_table(bs->first.dest_); | |
3401 | gold_assert(brlt_addr != invalid_address); | |
3402 | brlt_addr += this->targ_->brlt_section()->address(); | |
3403 | Address got_addr = got_os_addr + bs->first.toc_base_off_; | |
3404 | Address brltoff = brlt_addr - got_addr; | |
3405 | if (ha(brltoff) == 0) | |
3406 | { | |
3407 | write_insn<big_endian>(p, ld_11_2 + l(brltoff)), p += 4; | |
3408 | } | |
3409 | else | |
cf43a2fe | 3410 | { |
ec661b9d AM |
3411 | write_insn<big_endian>(p, addis_12_2 + ha(brltoff)), p += 4; |
3412 | write_insn<big_endian>(p, ld_11_12 + l(brltoff)), p += 4; | |
cf43a2fe AM |
3413 | } |
3414 | write_insn<big_endian>(p, mtctr_11), p += 4; | |
ec661b9d | 3415 | write_insn<big_endian>(p, bctr); |
cf43a2fe | 3416 | } |
ec661b9d AM |
3417 | } |
3418 | } | |
3419 | else | |
3420 | { | |
3421 | if (!this->plt_call_stubs_.empty()) | |
3422 | { | |
3423 | // The base address of the .plt section. | |
3424 | Address plt_base = this->targ_->plt_section()->address(); | |
3425 | Address iplt_base = invalid_address; | |
3426 | // The address of _GLOBAL_OFFSET_TABLE_. | |
3427 | Address g_o_t = invalid_address; | |
3428 | ||
3429 | // Write out plt call stubs. | |
3430 | typename Plt_stub_entries::const_iterator cs; | |
3431 | for (cs = this->plt_call_stubs_.begin(); | |
3432 | cs != this->plt_call_stubs_.end(); | |
3433 | ++cs) | |
cf43a2fe | 3434 | { |
ec661b9d AM |
3435 | Address plt_addr; |
3436 | bool is_ifunc; | |
3437 | const Symbol* gsym = cs->first.sym_; | |
3438 | if (gsym != NULL) | |
cf43a2fe | 3439 | { |
ec661b9d AM |
3440 | is_ifunc = (gsym->type() == elfcpp::STT_GNU_IFUNC |
3441 | && gsym->can_use_relative_reloc(false)); | |
3442 | plt_addr = gsym->plt_offset(); | |
cf43a2fe | 3443 | } |
ec661b9d AM |
3444 | else |
3445 | { | |
3446 | is_ifunc = true; | |
3447 | const Sized_relobj_file<size, big_endian>* relobj | |
3448 | = cs->first.object_; | |
3449 | unsigned int local_sym_index = cs->first.locsym_; | |
3450 | plt_addr = relobj->local_plt_offset(local_sym_index); | |
3451 | } | |
3452 | if (is_ifunc) | |
3453 | { | |
3454 | if (iplt_base == invalid_address) | |
3455 | iplt_base = this->targ_->iplt_section()->address(); | |
3456 | plt_addr += iplt_base; | |
3457 | } | |
3458 | else | |
3459 | plt_addr += plt_base; | |
3460 | ||
3461 | p = oview + cs->second; | |
3462 | if (parameters->options().output_is_position_independent()) | |
3463 | { | |
3464 | Address got_addr; | |
3465 | const Powerpc_relobj<size, big_endian>* ppcobj | |
3466 | = (static_cast<const Powerpc_relobj<size, big_endian>*> | |
3467 | (cs->first.object_)); | |
3468 | if (ppcobj != NULL && cs->first.addend_ >= 32768) | |
3469 | { | |
3470 | unsigned int got2 = ppcobj->got2_shndx(); | |
3471 | got_addr = ppcobj->get_output_section_offset(got2); | |
3472 | gold_assert(got_addr != invalid_address); | |
3473 | got_addr += (ppcobj->output_section(got2)->address() | |
3474 | + cs->first.addend_); | |
3475 | } | |
3476 | else | |
3477 | { | |
3478 | if (g_o_t == invalid_address) | |
3479 | { | |
3480 | const Output_data_got_powerpc<size, big_endian>* got | |
3481 | = this->targ_->got_section(); | |
3482 | g_o_t = got->address() + got->g_o_t(); | |
3483 | } | |
3484 | got_addr = g_o_t; | |
3485 | } | |
3486 | ||
9e69ed50 AM |
3487 | Address off = plt_addr - got_addr; |
3488 | if (ha(off) == 0) | |
ec661b9d | 3489 | { |
9e69ed50 | 3490 | write_insn<big_endian>(p + 0, lwz_11_30 + l(off)); |
ec661b9d AM |
3491 | write_insn<big_endian>(p + 4, mtctr_11); |
3492 | write_insn<big_endian>(p + 8, bctr); | |
3493 | } | |
3494 | else | |
3495 | { | |
9e69ed50 AM |
3496 | write_insn<big_endian>(p + 0, addis_11_30 + ha(off)); |
3497 | write_insn<big_endian>(p + 4, lwz_11_11 + l(off)); | |
ec661b9d AM |
3498 | write_insn<big_endian>(p + 8, mtctr_11); |
3499 | write_insn<big_endian>(p + 12, bctr); | |
3500 | } | |
3501 | } | |
3502 | else | |
3503 | { | |
3504 | write_insn<big_endian>(p + 0, lis_11 + ha(plt_addr)); | |
3505 | write_insn<big_endian>(p + 4, lwz_11_11 + l(plt_addr)); | |
3506 | write_insn<big_endian>(p + 8, mtctr_11); | |
3507 | write_insn<big_endian>(p + 12, bctr); | |
3508 | } | |
3509 | } | |
3510 | } | |
3511 | ||
3512 | // Write out long branch stubs. | |
3513 | typename Branch_stub_entries::const_iterator bs; | |
3514 | for (bs = this->long_branch_stubs_.begin(); | |
3515 | bs != this->long_branch_stubs_.end(); | |
3516 | ++bs) | |
3517 | { | |
3518 | p = oview + this->plt_size_ + bs->second; | |
3519 | Address loc = this->stub_address() + this->plt_size_ + bs->second; | |
3520 | Address delta = bs->first.dest_ - loc; | |
3521 | if (delta + (1 << 25) < 2 << 25) | |
3522 | write_insn<big_endian>(p, b | (delta & 0x3fffffc)); | |
3523 | else if (!parameters->options().output_is_position_independent()) | |
3524 | { | |
3525 | write_insn<big_endian>(p + 0, lis_12 + ha(bs->first.dest_)); | |
3526 | write_insn<big_endian>(p + 4, addi_12_12 + l(bs->first.dest_)); | |
3527 | write_insn<big_endian>(p + 8, mtctr_12); | |
3528 | write_insn<big_endian>(p + 12, bctr); | |
3529 | } | |
3530 | else | |
3531 | { | |
3532 | delta -= 8; | |
3533 | write_insn<big_endian>(p + 0, mflr_0); | |
3534 | write_insn<big_endian>(p + 4, bcl_20_31); | |
3535 | write_insn<big_endian>(p + 8, mflr_12); | |
3536 | write_insn<big_endian>(p + 12, addis_12_12 + ha(delta)); | |
3537 | write_insn<big_endian>(p + 16, addi_12_12 + l(delta)); | |
3538 | write_insn<big_endian>(p + 20, mtlr_0); | |
3539 | write_insn<big_endian>(p + 24, mtctr_12); | |
3540 | write_insn<big_endian>(p + 28, bctr); | |
cf43a2fe AM |
3541 | } |
3542 | } | |
ec661b9d AM |
3543 | } |
3544 | } | |
3545 | ||
3546 | // Write out .glink. | |
3547 | ||
3548 | template<int size, bool big_endian> | |
3549 | void | |
3550 | Output_data_glink<size, big_endian>::do_write(Output_file* of) | |
3551 | { | |
3552 | const section_size_type off = this->offset(); | |
3553 | const section_size_type oview_size = | |
3554 | convert_to_section_size_type(this->data_size()); | |
3555 | unsigned char* const oview = of->get_output_view(off, oview_size); | |
3556 | unsigned char* p; | |
3557 | ||
3558 | // The base address of the .plt section. | |
3559 | typedef typename elfcpp::Elf_types<size>::Elf_Addr Address; | |
3560 | Address plt_base = this->targ_->plt_section()->address(); | |
cf43a2fe | 3561 | |
ec661b9d AM |
3562 | if (size == 64) |
3563 | { | |
cf43a2fe | 3564 | // Write pltresolve stub. |
ec661b9d AM |
3565 | p = oview; |
3566 | Address after_bcl = this->address() + 16; | |
dd93cd0a | 3567 | Address pltoff = plt_base - after_bcl; |
cf43a2fe AM |
3568 | |
3569 | elfcpp::Swap<64, big_endian>::writeval(p, pltoff), p += 8; | |
3570 | ||
3571 | write_insn<big_endian>(p, mflr_12), p += 4; | |
3572 | write_insn<big_endian>(p, bcl_20_31), p += 4; | |
3573 | write_insn<big_endian>(p, mflr_11), p += 4; | |
3574 | write_insn<big_endian>(p, ld_2_11 + l(-16)), p += 4; | |
3575 | write_insn<big_endian>(p, mtlr_12), p += 4; | |
3576 | write_insn<big_endian>(p, add_12_2_11), p += 4; | |
3577 | write_insn<big_endian>(p, ld_11_12 + 0), p += 4; | |
3578 | write_insn<big_endian>(p, ld_2_12 + 8), p += 4; | |
3579 | write_insn<big_endian>(p, mtctr_11), p += 4; | |
3580 | write_insn<big_endian>(p, ld_11_12 + 16), p += 4; | |
3581 | write_insn<big_endian>(p, bctr), p += 4; | |
ec661b9d | 3582 | while (p < oview + this->pltresolve_size) |
cf43a2fe AM |
3583 | write_insn<big_endian>(p, nop), p += 4; |
3584 | ||
3585 | // Write lazy link call stubs. | |
3586 | uint32_t indx = 0; | |
3587 | while (p < oview + oview_size) | |
3588 | { | |
3589 | if (indx < 0x8000) | |
3590 | { | |
3591 | write_insn<big_endian>(p, li_0_0 + indx), p += 4; | |
3592 | } | |
3593 | else | |
3594 | { | |
3595 | write_insn<big_endian>(p, lis_0_0 + hi(indx)), p += 4; | |
3596 | write_insn<big_endian>(p, ori_0_0_0 + l(indx)), p += 4; | |
3597 | } | |
ec661b9d | 3598 | uint32_t branch_off = 8 - (p - oview); |
cf43a2fe AM |
3599 | write_insn<big_endian>(p, b + (branch_off & 0x3fffffc)), p += 4; |
3600 | indx++; | |
3601 | } | |
3602 | } | |
3603 | else | |
3604 | { | |
ec661b9d AM |
3605 | const Output_data_got_powerpc<size, big_endian>* got |
3606 | = this->targ_->got_section(); | |
dd93cd0a AM |
3607 | // The address of _GLOBAL_OFFSET_TABLE_. |
3608 | Address g_o_t = got->address() + got->g_o_t(); | |
c9269dff | 3609 | |
cf43a2fe | 3610 | // Write out pltresolve branch table. |
ec661b9d | 3611 | p = oview; |
cf43a2fe | 3612 | unsigned int the_end = oview_size - this->pltresolve_size; |
c9269dff | 3613 | unsigned char* end_p = oview + the_end; |
cf43a2fe AM |
3614 | while (p < end_p - 8 * 4) |
3615 | write_insn<big_endian>(p, b + end_p - p), p += 4; | |
3616 | while (p < end_p) | |
3617 | write_insn<big_endian>(p, nop), p += 4; | |
42cacb20 | 3618 | |
cf43a2fe AM |
3619 | // Write out pltresolve call stub. |
3620 | if (parameters->options().output_is_position_independent()) | |
42cacb20 | 3621 | { |
ec661b9d | 3622 | Address res0_off = 0; |
dd93cd0a AM |
3623 | Address after_bcl_off = the_end + 12; |
3624 | Address bcl_res0 = after_bcl_off - res0_off; | |
cf43a2fe AM |
3625 | |
3626 | write_insn<big_endian>(p + 0, addis_11_11 + ha(bcl_res0)); | |
3627 | write_insn<big_endian>(p + 4, mflr_0); | |
3628 | write_insn<big_endian>(p + 8, bcl_20_31); | |
3629 | write_insn<big_endian>(p + 12, addi_11_11 + l(bcl_res0)); | |
3630 | write_insn<big_endian>(p + 16, mflr_12); | |
3631 | write_insn<big_endian>(p + 20, mtlr_0); | |
3632 | write_insn<big_endian>(p + 24, sub_11_11_12); | |
3633 | ||
dd93cd0a | 3634 | Address got_bcl = g_o_t + 4 - (after_bcl_off + this->address()); |
cf43a2fe AM |
3635 | |
3636 | write_insn<big_endian>(p + 28, addis_12_12 + ha(got_bcl)); | |
3637 | if (ha(got_bcl) == ha(got_bcl + 4)) | |
3638 | { | |
3639 | write_insn<big_endian>(p + 32, lwz_0_12 + l(got_bcl)); | |
3640 | write_insn<big_endian>(p + 36, lwz_12_12 + l(got_bcl + 4)); | |
3641 | } | |
3642 | else | |
3643 | { | |
3644 | write_insn<big_endian>(p + 32, lwzu_0_12 + l(got_bcl)); | |
3645 | write_insn<big_endian>(p + 36, lwz_12_12 + 4); | |
3646 | } | |
3647 | write_insn<big_endian>(p + 40, mtctr_0); | |
3648 | write_insn<big_endian>(p + 44, add_0_11_11); | |
3649 | write_insn<big_endian>(p + 48, add_11_0_11); | |
3650 | write_insn<big_endian>(p + 52, bctr); | |
3651 | write_insn<big_endian>(p + 56, nop); | |
3652 | write_insn<big_endian>(p + 60, nop); | |
42cacb20 | 3653 | } |
cf43a2fe | 3654 | else |
42cacb20 | 3655 | { |
ec661b9d | 3656 | Address res0 = this->address(); |
cf43a2fe AM |
3657 | |
3658 | write_insn<big_endian>(p + 0, lis_12 + ha(g_o_t + 4)); | |
3659 | write_insn<big_endian>(p + 4, addis_11_11 + ha(-res0)); | |
3660 | if (ha(g_o_t + 4) == ha(g_o_t + 8)) | |
3661 | write_insn<big_endian>(p + 8, lwz_0_12 + l(g_o_t + 4)); | |
3662 | else | |
3663 | write_insn<big_endian>(p + 8, lwzu_0_12 + l(g_o_t + 4)); | |
3664 | write_insn<big_endian>(p + 12, addi_11_11 + l(-res0)); | |
3665 | write_insn<big_endian>(p + 16, mtctr_0); | |
3666 | write_insn<big_endian>(p + 20, add_0_11_11); | |
3667 | if (ha(g_o_t + 4) == ha(g_o_t + 8)) | |
3668 | write_insn<big_endian>(p + 24, lwz_12_12 + l(g_o_t + 8)); | |
3669 | else | |
3670 | write_insn<big_endian>(p + 24, lwz_12_12 + 4); | |
3671 | write_insn<big_endian>(p + 28, add_11_0_11); | |
3672 | write_insn<big_endian>(p + 32, bctr); | |
3673 | write_insn<big_endian>(p + 36, nop); | |
3674 | write_insn<big_endian>(p + 40, nop); | |
3675 | write_insn<big_endian>(p + 44, nop); | |
3676 | write_insn<big_endian>(p + 48, nop); | |
3677 | write_insn<big_endian>(p + 52, nop); | |
3678 | write_insn<big_endian>(p + 56, nop); | |
3679 | write_insn<big_endian>(p + 60, nop); | |
42cacb20 | 3680 | } |
cf43a2fe | 3681 | p += 64; |
42cacb20 DE |
3682 | } |
3683 | ||
cf43a2fe AM |
3684 | of->write_output_view(off, oview_size, oview); |
3685 | } | |
3686 | ||
f3a0ed29 AM |
3687 | |
3688 | // A class to handle linker generated save/restore functions. | |
3689 | ||
3690 | template<int size, bool big_endian> | |
3691 | class Output_data_save_res : public Output_section_data_build | |
3692 | { | |
3693 | public: | |
3694 | Output_data_save_res(Symbol_table* symtab); | |
3695 | ||
3696 | protected: | |
3697 | // Write to a map file. | |
3698 | void | |
3699 | do_print_to_mapfile(Mapfile* mapfile) const | |
3700 | { mapfile->print_output_data(this, _("** save/restore")); } | |
3701 | ||
3702 | void | |
3703 | do_write(Output_file*); | |
3704 | ||
3705 | private: | |
3706 | // The maximum size of save/restore contents. | |
3707 | static const unsigned int savres_max = 218*4; | |
3708 | ||
3709 | void | |
3710 | savres_define(Symbol_table* symtab, | |
3711 | const char *name, | |
3712 | unsigned int lo, unsigned int hi, | |
3713 | unsigned char* write_ent(unsigned char*, int), | |
3714 | unsigned char* write_tail(unsigned char*, int)); | |
3715 | ||
3716 | unsigned char *contents_; | |
3717 | }; | |
3718 | ||
3719 | template<bool big_endian> | |
3720 | static unsigned char* | |
3721 | savegpr0(unsigned char* p, int r) | |
3722 | { | |
3723 | uint32_t insn = std_0_1 + (r << 21) + (1 << 16) - (32 - r) * 8; | |
3724 | write_insn<big_endian>(p, insn); | |
3725 | return p + 4; | |
3726 | } | |
3727 | ||
3728 | template<bool big_endian> | |
3729 | static unsigned char* | |
3730 | savegpr0_tail(unsigned char* p, int r) | |
3731 | { | |
3732 | p = savegpr0<big_endian>(p, r); | |
3733 | uint32_t insn = std_0_1 + 16; | |
3734 | write_insn<big_endian>(p, insn); | |
3735 | p = p + 4; | |
3736 | write_insn<big_endian>(p, blr); | |
3737 | return p + 4; | |
3738 | } | |
3739 | ||
3740 | template<bool big_endian> | |
62fe925a | 3741 | static unsigned char* |
f3a0ed29 AM |
3742 | restgpr0(unsigned char* p, int r) |
3743 | { | |
3744 | uint32_t insn = ld_0_1 + (r << 21) + (1 << 16) - (32 - r) * 8; | |
3745 | write_insn<big_endian>(p, insn); | |
3746 | return p + 4; | |
3747 | } | |
3748 | ||
3749 | template<bool big_endian> | |
62fe925a | 3750 | static unsigned char* |
f3a0ed29 AM |
3751 | restgpr0_tail(unsigned char* p, int r) |
3752 | { | |
3753 | uint32_t insn = ld_0_1 + 16; | |
3754 | write_insn<big_endian>(p, insn); | |
3755 | p = p + 4; | |
3756 | p = restgpr0<big_endian>(p, r); | |
3757 | write_insn<big_endian>(p, mtlr_0); | |
3758 | p = p + 4; | |
3759 | if (r == 29) | |
3760 | { | |
3761 | p = restgpr0<big_endian>(p, 30); | |
3762 | p = restgpr0<big_endian>(p, 31); | |
3763 | } | |
3764 | write_insn<big_endian>(p, blr); | |
3765 | return p + 4; | |
3766 | } | |
3767 | ||
3768 | template<bool big_endian> | |
62fe925a | 3769 | static unsigned char* |
f3a0ed29 AM |
3770 | savegpr1(unsigned char* p, int r) |
3771 | { | |
3772 | uint32_t insn = std_0_12 + (r << 21) + (1 << 16) - (32 - r) * 8; | |
3773 | write_insn<big_endian>(p, insn); | |
3774 | return p + 4; | |
3775 | } | |
3776 | ||
3777 | template<bool big_endian> | |
62fe925a | 3778 | static unsigned char* |
f3a0ed29 AM |
3779 | savegpr1_tail(unsigned char* p, int r) |
3780 | { | |
3781 | p = savegpr1<big_endian>(p, r); | |
3782 | write_insn<big_endian>(p, blr); | |
3783 | return p + 4; | |
3784 | } | |
3785 | ||
3786 | template<bool big_endian> | |
62fe925a | 3787 | static unsigned char* |
f3a0ed29 AM |
3788 | restgpr1(unsigned char* p, int r) |
3789 | { | |
3790 | uint32_t insn = ld_0_12 + (r << 21) + (1 << 16) - (32 - r) * 8; | |
3791 | write_insn<big_endian>(p, insn); | |
3792 | return p + 4; | |
3793 | } | |
3794 | ||
3795 | template<bool big_endian> | |
62fe925a | 3796 | static unsigned char* |
f3a0ed29 AM |
3797 | restgpr1_tail(unsigned char* p, int r) |
3798 | { | |
3799 | p = restgpr1<big_endian>(p, r); | |
3800 | write_insn<big_endian>(p, blr); | |
3801 | return p + 4; | |
3802 | } | |
3803 | ||
3804 | template<bool big_endian> | |
62fe925a | 3805 | static unsigned char* |
f3a0ed29 AM |
3806 | savefpr(unsigned char* p, int r) |
3807 | { | |
3808 | uint32_t insn = stfd_0_1 + (r << 21) + (1 << 16) - (32 - r) * 8; | |
3809 | write_insn<big_endian>(p, insn); | |
3810 | return p + 4; | |
3811 | } | |
3812 | ||
3813 | template<bool big_endian> | |
62fe925a | 3814 | static unsigned char* |
f3a0ed29 AM |
3815 | savefpr0_tail(unsigned char* p, int r) |
3816 | { | |
3817 | p = savefpr<big_endian>(p, r); | |
3818 | write_insn<big_endian>(p, std_0_1 + 16); | |
3819 | p = p + 4; | |
3820 | write_insn<big_endian>(p, blr); | |
3821 | return p + 4; | |
3822 | } | |
3823 | ||
3824 | template<bool big_endian> | |
62fe925a | 3825 | static unsigned char* |
f3a0ed29 AM |
3826 | restfpr(unsigned char* p, int r) |
3827 | { | |
3828 | uint32_t insn = lfd_0_1 + (r << 21) + (1 << 16) - (32 - r) * 8; | |
3829 | write_insn<big_endian>(p, insn); | |
3830 | return p + 4; | |
3831 | } | |
3832 | ||
3833 | template<bool big_endian> | |
62fe925a | 3834 | static unsigned char* |
f3a0ed29 AM |
3835 | restfpr0_tail(unsigned char* p, int r) |
3836 | { | |
3837 | write_insn<big_endian>(p, ld_0_1 + 16); | |
3838 | p = p + 4; | |
3839 | p = restfpr<big_endian>(p, r); | |
3840 | write_insn<big_endian>(p, mtlr_0); | |
3841 | p = p + 4; | |
3842 | if (r == 29) | |
3843 | { | |
3844 | p = restfpr<big_endian>(p, 30); | |
3845 | p = restfpr<big_endian>(p, 31); | |
3846 | } | |
3847 | write_insn<big_endian>(p, blr); | |
3848 | return p + 4; | |
3849 | } | |
3850 | ||
3851 | template<bool big_endian> | |
62fe925a | 3852 | static unsigned char* |
f3a0ed29 AM |
3853 | savefpr1_tail(unsigned char* p, int r) |
3854 | { | |
3855 | p = savefpr<big_endian>(p, r); | |
3856 | write_insn<big_endian>(p, blr); | |
3857 | return p + 4; | |
3858 | } | |
3859 | ||
3860 | template<bool big_endian> | |
62fe925a | 3861 | static unsigned char* |
f3a0ed29 AM |
3862 | restfpr1_tail(unsigned char* p, int r) |
3863 | { | |
3864 | p = restfpr<big_endian>(p, r); | |
3865 | write_insn<big_endian>(p, blr); | |
3866 | return p + 4; | |
3867 | } | |
3868 | ||
3869 | template<bool big_endian> | |
62fe925a | 3870 | static unsigned char* |
f3a0ed29 AM |
3871 | savevr(unsigned char* p, int r) |
3872 | { | |
3873 | uint32_t insn = li_12_0 + (1 << 16) - (32 - r) * 16; | |
3874 | write_insn<big_endian>(p, insn); | |
3875 | p = p + 4; | |
3876 | insn = stvx_0_12_0 + (r << 21); | |
3877 | write_insn<big_endian>(p, insn); | |
3878 | return p + 4; | |
3879 | } | |
3880 | ||
3881 | template<bool big_endian> | |
62fe925a | 3882 | static unsigned char* |
f3a0ed29 AM |
3883 | savevr_tail(unsigned char* p, int r) |
3884 | { | |
3885 | p = savevr<big_endian>(p, r); | |
3886 | write_insn<big_endian>(p, blr); | |
3887 | return p + 4; | |
3888 | } | |
3889 | ||
3890 | template<bool big_endian> | |
62fe925a | 3891 | static unsigned char* |
f3a0ed29 AM |
3892 | restvr(unsigned char* p, int r) |
3893 | { | |
3894 | uint32_t insn = li_12_0 + (1 << 16) - (32 - r) * 16; | |
3895 | write_insn<big_endian>(p, insn); | |
3896 | p = p + 4; | |
3897 | insn = lvx_0_12_0 + (r << 21); | |
3898 | write_insn<big_endian>(p, insn); | |
3899 | return p + 4; | |
3900 | } | |
3901 | ||
3902 | template<bool big_endian> | |
62fe925a | 3903 | static unsigned char* |
f3a0ed29 AM |
3904 | restvr_tail(unsigned char* p, int r) |
3905 | { | |
3906 | p = restvr<big_endian>(p, r); | |
3907 | write_insn<big_endian>(p, blr); | |
3908 | return p + 4; | |
3909 | } | |
3910 | ||
3911 | ||
3912 | template<int size, bool big_endian> | |
3913 | Output_data_save_res<size, big_endian>::Output_data_save_res( | |
3914 | Symbol_table* symtab) | |
3915 | : Output_section_data_build(4), | |
3916 | contents_(NULL) | |
3917 | { | |
3918 | this->savres_define(symtab, | |
3919 | "_savegpr0_", 14, 31, | |
3920 | savegpr0<big_endian>, savegpr0_tail<big_endian>); | |
3921 | this->savres_define(symtab, | |
3922 | "_restgpr0_", 14, 29, | |
3923 | restgpr0<big_endian>, restgpr0_tail<big_endian>); | |
3924 | this->savres_define(symtab, | |
3925 | "_restgpr0_", 30, 31, | |
3926 | restgpr0<big_endian>, restgpr0_tail<big_endian>); | |
3927 | this->savres_define(symtab, | |
3928 | "_savegpr1_", 14, 31, | |
3929 | savegpr1<big_endian>, savegpr1_tail<big_endian>); | |
3930 | this->savres_define(symtab, | |
3931 | "_restgpr1_", 14, 31, | |
3932 | restgpr1<big_endian>, restgpr1_tail<big_endian>); | |
3933 | this->savres_define(symtab, | |
3934 | "_savefpr_", 14, 31, | |
3935 | savefpr<big_endian>, savefpr0_tail<big_endian>); | |
3936 | this->savres_define(symtab, | |
3937 | "_restfpr_", 14, 29, | |
3938 | restfpr<big_endian>, restfpr0_tail<big_endian>); | |
3939 | this->savres_define(symtab, | |
3940 | "_restfpr_", 30, 31, | |
3941 | restfpr<big_endian>, restfpr0_tail<big_endian>); | |
3942 | this->savres_define(symtab, | |
3943 | "._savef", 14, 31, | |
3944 | savefpr<big_endian>, savefpr1_tail<big_endian>); | |
3945 | this->savres_define(symtab, | |
3946 | "._restf", 14, 31, | |
3947 | restfpr<big_endian>, restfpr1_tail<big_endian>); | |
3948 | this->savres_define(symtab, | |
3949 | "_savevr_", 20, 31, | |
3950 | savevr<big_endian>, savevr_tail<big_endian>); | |
3951 | this->savres_define(symtab, | |
3952 | "_restvr_", 20, 31, | |
3953 | restvr<big_endian>, restvr_tail<big_endian>); | |
3954 | } | |
3955 | ||
3956 | template<int size, bool big_endian> | |
3957 | void | |
3958 | Output_data_save_res<size, big_endian>::savres_define( | |
3959 | Symbol_table* symtab, | |
3960 | const char *name, | |
3961 | unsigned int lo, unsigned int hi, | |
3962 | unsigned char* write_ent(unsigned char*, int), | |
3963 | unsigned char* write_tail(unsigned char*, int)) | |
3964 | { | |
3965 | size_t len = strlen(name); | |
3966 | bool writing = false; | |
3967 | char sym[16]; | |
3968 | ||
3969 | memcpy(sym, name, len); | |
3970 | sym[len + 2] = 0; | |
3971 | ||
3972 | for (unsigned int i = lo; i <= hi; i++) | |
3973 | { | |
3974 | sym[len + 0] = i / 10 + '0'; | |
3975 | sym[len + 1] = i % 10 + '0'; | |
3976 | Symbol* gsym = symtab->lookup(sym); | |
3977 | bool refd = gsym != NULL && gsym->is_undefined(); | |
3978 | writing = writing || refd; | |
3979 | if (writing) | |
3980 | { | |
3981 | if (this->contents_ == NULL) | |
3982 | this->contents_ = new unsigned char[this->savres_max]; | |
3983 | ||
ec661b9d | 3984 | section_size_type value = this->current_data_size(); |
f3a0ed29 AM |
3985 | unsigned char* p = this->contents_ + value; |
3986 | if (i != hi) | |
3987 | p = write_ent(p, i); | |
3988 | else | |
3989 | p = write_tail(p, i); | |
ec661b9d | 3990 | section_size_type cur_size = p - this->contents_; |
f3a0ed29 AM |
3991 | this->set_current_data_size(cur_size); |
3992 | if (refd) | |
3993 | symtab->define_in_output_data(sym, NULL, Symbol_table::PREDEFINED, | |
3994 | this, value, cur_size - value, | |
3995 | elfcpp::STT_FUNC, elfcpp::STB_GLOBAL, | |
3996 | elfcpp::STV_HIDDEN, 0, false, false); | |
3997 | } | |
3998 | } | |
3999 | } | |
4000 | ||
4001 | // Write out save/restore. | |
4002 | ||
4003 | template<int size, bool big_endian> | |
4004 | void | |
4005 | Output_data_save_res<size, big_endian>::do_write(Output_file* of) | |
4006 | { | |
ec661b9d | 4007 | const section_size_type off = this->offset(); |
f3a0ed29 AM |
4008 | const section_size_type oview_size = |
4009 | convert_to_section_size_type(this->data_size()); | |
4010 | unsigned char* const oview = of->get_output_view(off, oview_size); | |
4011 | memcpy(oview, this->contents_, oview_size); | |
4012 | of->write_output_view(off, oview_size, oview); | |
4013 | } | |
4014 | ||
4015 | ||
cf43a2fe | 4016 | // Create the glink section. |
42cacb20 | 4017 | |
cf43a2fe AM |
4018 | template<int size, bool big_endian> |
4019 | void | |
4020 | Target_powerpc<size, big_endian>::make_glink_section(Layout* layout) | |
4021 | { | |
4022 | if (this->glink_ == NULL) | |
4023 | { | |
4024 | this->glink_ = new Output_data_glink<size, big_endian>(this); | |
4025 | layout->add_output_section_data(".text", elfcpp::SHT_PROGBITS, | |
4026 | elfcpp::SHF_ALLOC | elfcpp::SHF_EXECINSTR, | |
4027 | this->glink_, ORDER_TEXT, false); | |
4028 | } | |
42cacb20 DE |
4029 | } |
4030 | ||
4031 | // Create a PLT entry for a global symbol. | |
4032 | ||
4033 | template<int size, bool big_endian> | |
4034 | void | |
ec661b9d AM |
4035 | Target_powerpc<size, big_endian>::make_plt_entry(Symbol_table* symtab, |
4036 | Layout* layout, | |
4037 | Symbol* gsym) | |
42cacb20 | 4038 | { |
e5d5f5ed AM |
4039 | if (gsym->type() == elfcpp::STT_GNU_IFUNC |
4040 | && gsym->can_use_relative_reloc(false)) | |
4041 | { | |
4042 | if (this->iplt_ == NULL) | |
40b469d7 | 4043 | this->make_iplt_section(symtab, layout); |
03e25981 | 4044 | this->iplt_->add_ifunc_entry(gsym); |
e5d5f5ed AM |
4045 | } |
4046 | else | |
4047 | { | |
4048 | if (this->plt_ == NULL) | |
40b469d7 | 4049 | this->make_plt_section(symtab, layout); |
03e25981 | 4050 | this->plt_->add_entry(gsym); |
e5d5f5ed | 4051 | } |
e5d5f5ed | 4052 | } |
42cacb20 | 4053 | |
e5d5f5ed | 4054 | // Make a PLT entry for a local STT_GNU_IFUNC symbol. |
612a8d3d | 4055 | |
e5d5f5ed AM |
4056 | template<int size, bool big_endian> |
4057 | void | |
4058 | Target_powerpc<size, big_endian>::make_local_ifunc_plt_entry( | |
40b469d7 | 4059 | Symbol_table* symtab, |
e5d5f5ed | 4060 | Layout* layout, |
ec661b9d AM |
4061 | Sized_relobj_file<size, big_endian>* relobj, |
4062 | unsigned int r_sym) | |
e5d5f5ed AM |
4063 | { |
4064 | if (this->iplt_ == NULL) | |
40b469d7 | 4065 | this->make_iplt_section(symtab, layout); |
03e25981 | 4066 | this->iplt_->add_local_ifunc_entry(relobj, r_sym); |
42cacb20 DE |
4067 | } |
4068 | ||
0e70b911 CC |
4069 | // Return the number of entries in the PLT. |
4070 | ||
4071 | template<int size, bool big_endian> | |
4072 | unsigned int | |
4073 | Target_powerpc<size, big_endian>::plt_entry_count() const | |
4074 | { | |
4075 | if (this->plt_ == NULL) | |
4076 | return 0; | |
e5d5f5ed AM |
4077 | unsigned int count = this->plt_->entry_count(); |
4078 | if (this->iplt_ != NULL) | |
4079 | count += this->iplt_->entry_count(); | |
4080 | return count; | |
0e70b911 CC |
4081 | } |
4082 | ||
4083 | // Return the offset of the first non-reserved PLT entry. | |
4084 | ||
4085 | template<int size, bool big_endian> | |
4086 | unsigned int | |
4087 | Target_powerpc<size, big_endian>::first_plt_entry_offset() const | |
4088 | { | |
e5d5f5ed | 4089 | return this->plt_->first_plt_entry_offset(); |
0e70b911 CC |
4090 | } |
4091 | ||
4092 | // Return the size of each PLT entry. | |
4093 | ||
4094 | template<int size, bool big_endian> | |
4095 | unsigned int | |
4096 | Target_powerpc<size, big_endian>::plt_entry_size() const | |
4097 | { | |
4098 | return Output_data_plt_powerpc<size, big_endian>::get_plt_entry_size(); | |
4099 | } | |
4100 | ||
dd93cd0a | 4101 | // Create a GOT entry for local dynamic __tls_get_addr calls. |
42cacb20 DE |
4102 | |
4103 | template<int size, bool big_endian> | |
4104 | unsigned int | |
dd93cd0a | 4105 | Target_powerpc<size, big_endian>::tlsld_got_offset( |
6fa2a40b CC |
4106 | Symbol_table* symtab, |
4107 | Layout* layout, | |
4108 | Sized_relobj_file<size, big_endian>* object) | |
42cacb20 | 4109 | { |
dd93cd0a | 4110 | if (this->tlsld_got_offset_ == -1U) |
42cacb20 DE |
4111 | { |
4112 | gold_assert(symtab != NULL && layout != NULL && object != NULL); | |
4113 | Reloc_section* rela_dyn = this->rela_dyn_section(layout); | |
dd93cd0a AM |
4114 | Output_data_got_powerpc<size, big_endian>* got |
4115 | = this->got_section(symtab, layout); | |
4116 | unsigned int got_offset = got->add_constant_pair(0, 0); | |
42cacb20 DE |
4117 | rela_dyn->add_local(object, 0, elfcpp::R_POWERPC_DTPMOD, got, |
4118 | got_offset, 0); | |
dd93cd0a | 4119 | this->tlsld_got_offset_ = got_offset; |
42cacb20 | 4120 | } |
dd93cd0a | 4121 | return this->tlsld_got_offset_; |
42cacb20 DE |
4122 | } |
4123 | ||
95a2c8d6 RS |
4124 | // Get the Reference_flags for a particular relocation. |
4125 | ||
4126 | template<int size, bool big_endian> | |
4127 | int | |
d83ce4e3 | 4128 | Target_powerpc<size, big_endian>::Scan::get_reference_flags(unsigned int r_type) |
95a2c8d6 RS |
4129 | { |
4130 | switch (r_type) | |
4131 | { | |
4132 | case elfcpp::R_POWERPC_NONE: | |
4133 | case elfcpp::R_POWERPC_GNU_VTINHERIT: | |
4134 | case elfcpp::R_POWERPC_GNU_VTENTRY: | |
4135 | case elfcpp::R_PPC64_TOC: | |
4136 | // No symbol reference. | |
4137 | return 0; | |
4138 | ||
dd93cd0a AM |
4139 | case elfcpp::R_PPC64_ADDR64: |
4140 | case elfcpp::R_PPC64_UADDR64: | |
4141 | case elfcpp::R_POWERPC_ADDR32: | |
4142 | case elfcpp::R_POWERPC_UADDR32: | |
95a2c8d6 | 4143 | case elfcpp::R_POWERPC_ADDR16: |
dd93cd0a | 4144 | case elfcpp::R_POWERPC_UADDR16: |
95a2c8d6 RS |
4145 | case elfcpp::R_POWERPC_ADDR16_LO: |
4146 | case elfcpp::R_POWERPC_ADDR16_HI: | |
4147 | case elfcpp::R_POWERPC_ADDR16_HA: | |
95a2c8d6 RS |
4148 | return Symbol::ABSOLUTE_REF; |
4149 | ||
dd93cd0a AM |
4150 | case elfcpp::R_POWERPC_ADDR24: |
4151 | case elfcpp::R_POWERPC_ADDR14: | |
4152 | case elfcpp::R_POWERPC_ADDR14_BRTAKEN: | |
4153 | case elfcpp::R_POWERPC_ADDR14_BRNTAKEN: | |
4154 | return Symbol::FUNCTION_CALL | Symbol::ABSOLUTE_REF; | |
4155 | ||
e5d5f5ed | 4156 | case elfcpp::R_PPC64_REL64: |
dd93cd0a | 4157 | case elfcpp::R_POWERPC_REL32: |
95a2c8d6 | 4158 | case elfcpp::R_PPC_LOCAL24PC: |
6ce78956 AM |
4159 | case elfcpp::R_POWERPC_REL16: |
4160 | case elfcpp::R_POWERPC_REL16_LO: | |
4161 | case elfcpp::R_POWERPC_REL16_HI: | |
4162 | case elfcpp::R_POWERPC_REL16_HA: | |
95a2c8d6 RS |
4163 | return Symbol::RELATIVE_REF; |
4164 | ||
dd93cd0a | 4165 | case elfcpp::R_POWERPC_REL24: |
95a2c8d6 | 4166 | case elfcpp::R_PPC_PLTREL24: |
dd93cd0a AM |
4167 | case elfcpp::R_POWERPC_REL14: |
4168 | case elfcpp::R_POWERPC_REL14_BRTAKEN: | |
4169 | case elfcpp::R_POWERPC_REL14_BRNTAKEN: | |
95a2c8d6 RS |
4170 | return Symbol::FUNCTION_CALL | Symbol::RELATIVE_REF; |
4171 | ||
4172 | case elfcpp::R_POWERPC_GOT16: | |
4173 | case elfcpp::R_POWERPC_GOT16_LO: | |
4174 | case elfcpp::R_POWERPC_GOT16_HI: | |
4175 | case elfcpp::R_POWERPC_GOT16_HA: | |
e5d5f5ed AM |
4176 | case elfcpp::R_PPC64_GOT16_DS: |
4177 | case elfcpp::R_PPC64_GOT16_LO_DS: | |
95a2c8d6 RS |
4178 | case elfcpp::R_PPC64_TOC16: |
4179 | case elfcpp::R_PPC64_TOC16_LO: | |
4180 | case elfcpp::R_PPC64_TOC16_HI: | |
4181 | case elfcpp::R_PPC64_TOC16_HA: | |
4182 | case elfcpp::R_PPC64_TOC16_DS: | |
4183 | case elfcpp::R_PPC64_TOC16_LO_DS: | |
4184 | // Absolute in GOT. | |
4185 | return Symbol::ABSOLUTE_REF; | |
4186 | ||
4187 | case elfcpp::R_POWERPC_GOT_TPREL16: | |
4188 | case elfcpp::R_POWERPC_TLS: | |
4189 | return Symbol::TLS_REF; | |
4190 | ||
4191 | case elfcpp::R_POWERPC_COPY: | |
4192 | case elfcpp::R_POWERPC_GLOB_DAT: | |
4193 | case elfcpp::R_POWERPC_JMP_SLOT: | |
4194 | case elfcpp::R_POWERPC_RELATIVE: | |
4195 | case elfcpp::R_POWERPC_DTPMOD: | |
4196 | default: | |
4197 | // Not expected. We will give an error later. | |
4198 | return 0; | |
4199 | } | |
4200 | } | |
4201 | ||
42cacb20 DE |
4202 | // Report an unsupported relocation against a local symbol. |
4203 | ||
4204 | template<int size, bool big_endian> | |
4205 | void | |
4206 | Target_powerpc<size, big_endian>::Scan::unsupported_reloc_local( | |
d83ce4e3 AM |
4207 | Sized_relobj_file<size, big_endian>* object, |
4208 | unsigned int r_type) | |
42cacb20 DE |
4209 | { |
4210 | gold_error(_("%s: unsupported reloc %u against local symbol"), | |
4211 | object->name().c_str(), r_type); | |
4212 | } | |
4213 | ||
4214 | // We are about to emit a dynamic relocation of type R_TYPE. If the | |
4215 | // dynamic linker does not support it, issue an error. | |
4216 | ||
4217 | template<int size, bool big_endian> | |
4218 | void | |
4219 | Target_powerpc<size, big_endian>::Scan::check_non_pic(Relobj* object, | |
4220 | unsigned int r_type) | |
4221 | { | |
4222 | gold_assert(r_type != elfcpp::R_POWERPC_NONE); | |
4223 | ||
4224 | // These are the relocation types supported by glibc for both 32-bit | |
4225 | // and 64-bit powerpc. | |
4226 | switch (r_type) | |
4227 | { | |
3ea0a085 | 4228 | case elfcpp::R_POWERPC_NONE: |
42cacb20 DE |
4229 | case elfcpp::R_POWERPC_RELATIVE: |
4230 | case elfcpp::R_POWERPC_GLOB_DAT: | |
4231 | case elfcpp::R_POWERPC_DTPMOD: | |
4232 | case elfcpp::R_POWERPC_DTPREL: | |
4233 | case elfcpp::R_POWERPC_TPREL: | |
4234 | case elfcpp::R_POWERPC_JMP_SLOT: | |
4235 | case elfcpp::R_POWERPC_COPY: | |
3ea0a085 | 4236 | case elfcpp::R_POWERPC_IRELATIVE: |
42cacb20 | 4237 | case elfcpp::R_POWERPC_ADDR32: |
3ea0a085 | 4238 | case elfcpp::R_POWERPC_UADDR32: |
42cacb20 | 4239 | case elfcpp::R_POWERPC_ADDR24: |
3ea0a085 AM |
4240 | case elfcpp::R_POWERPC_ADDR16: |
4241 | case elfcpp::R_POWERPC_UADDR16: | |
4242 | case elfcpp::R_POWERPC_ADDR16_LO: | |
4243 | case elfcpp::R_POWERPC_ADDR16_HI: | |
4244 | case elfcpp::R_POWERPC_ADDR16_HA: | |
4245 | case elfcpp::R_POWERPC_ADDR14: | |
4246 | case elfcpp::R_POWERPC_ADDR14_BRTAKEN: | |
4247 | case elfcpp::R_POWERPC_ADDR14_BRNTAKEN: | |
4248 | case elfcpp::R_POWERPC_REL32: | |
42cacb20 | 4249 | case elfcpp::R_POWERPC_REL24: |
3ea0a085 AM |
4250 | case elfcpp::R_POWERPC_TPREL16: |
4251 | case elfcpp::R_POWERPC_TPREL16_LO: | |
4252 | case elfcpp::R_POWERPC_TPREL16_HI: | |
4253 | case elfcpp::R_POWERPC_TPREL16_HA: | |
42cacb20 DE |
4254 | return; |
4255 | ||
4256 | default: | |
4257 | break; | |
4258 | } | |
4259 | ||
4260 | if (size == 64) | |
4261 | { | |
4262 | switch (r_type) | |
4263 | { | |
4264 | // These are the relocation types supported only on 64-bit. | |
4265 | case elfcpp::R_PPC64_ADDR64: | |
42cacb20 | 4266 | case elfcpp::R_PPC64_UADDR64: |
3ea0a085 | 4267 | case elfcpp::R_PPC64_JMP_IREL: |
42cacb20 | 4268 | case elfcpp::R_PPC64_ADDR16_DS: |
3ea0a085 | 4269 | case elfcpp::R_PPC64_ADDR16_LO_DS: |
42cacb20 DE |
4270 | case elfcpp::R_PPC64_ADDR16_HIGHER: |
4271 | case elfcpp::R_PPC64_ADDR16_HIGHEST: | |
4272 | case elfcpp::R_PPC64_ADDR16_HIGHERA: | |
4273 | case elfcpp::R_PPC64_ADDR16_HIGHESTA: | |
42cacb20 | 4274 | case elfcpp::R_PPC64_REL64: |
3ea0a085 AM |
4275 | case elfcpp::R_POWERPC_ADDR30: |
4276 | case elfcpp::R_PPC64_TPREL16_DS: | |
4277 | case elfcpp::R_PPC64_TPREL16_LO_DS: | |
4278 | case elfcpp::R_PPC64_TPREL16_HIGHER: | |
4279 | case elfcpp::R_PPC64_TPREL16_HIGHEST: | |
4280 | case elfcpp::R_PPC64_TPREL16_HIGHERA: | |
4281 | case elfcpp::R_PPC64_TPREL16_HIGHESTA: | |
42cacb20 DE |
4282 | return; |
4283 | ||
4284 | default: | |
4285 | break; | |
4286 | } | |
4287 | } | |
4288 | else | |
4289 | { | |
4290 | switch (r_type) | |
4291 | { | |
4292 | // These are the relocation types supported only on 32-bit. | |
3ea0a085 AM |
4293 | // ??? glibc ld.so doesn't need to support these. |
4294 | case elfcpp::R_POWERPC_DTPREL16: | |
4295 | case elfcpp::R_POWERPC_DTPREL16_LO: | |
4296 | case elfcpp::R_POWERPC_DTPREL16_HI: | |
4297 | case elfcpp::R_POWERPC_DTPREL16_HA: | |
4298 | return; | |
42cacb20 DE |
4299 | |
4300 | default: | |
4301 | break; | |
4302 | } | |
4303 | } | |
4304 | ||
4305 | // This prevents us from issuing more than one error per reloc | |
4306 | // section. But we can still wind up issuing more than one | |
4307 | // error per object file. | |
4308 | if (this->issued_non_pic_error_) | |
4309 | return; | |
33aea2fd | 4310 | gold_assert(parameters->options().output_is_position_independent()); |
42cacb20 DE |
4311 | object->error(_("requires unsupported dynamic reloc; " |
4312 | "recompile with -fPIC")); | |
4313 | this->issued_non_pic_error_ = true; | |
4314 | return; | |
4315 | } | |
4316 | ||
e5d5f5ed AM |
4317 | // Return whether we need to make a PLT entry for a relocation of the |
4318 | // given type against a STT_GNU_IFUNC symbol. | |
4319 | ||
4320 | template<int size, bool big_endian> | |
4321 | bool | |
4322 | Target_powerpc<size, big_endian>::Scan::reloc_needs_plt_for_ifunc( | |
4323 | Sized_relobj_file<size, big_endian>* object, | |
4324 | unsigned int r_type) | |
4325 | { | |
c9824451 AM |
4326 | // In non-pic code any reference will resolve to the plt call stub |
4327 | // for the ifunc symbol. | |
4328 | if (size == 32 && !parameters->options().output_is_position_independent()) | |
4329 | return true; | |
4330 | ||
e5d5f5ed AM |
4331 | switch (r_type) |
4332 | { | |
4333 | // Word size refs from data sections are OK. | |
4334 | case elfcpp::R_POWERPC_ADDR32: | |
4335 | case elfcpp::R_POWERPC_UADDR32: | |
4336 | if (size == 32) | |
4337 | return true; | |
4338 | break; | |
4339 | ||
4340 | case elfcpp::R_PPC64_ADDR64: | |
4341 | case elfcpp::R_PPC64_UADDR64: | |
4342 | if (size == 64) | |
4343 | return true; | |
4344 | break; | |
4345 | ||
4346 | // GOT refs are good. | |
4347 | case elfcpp::R_POWERPC_GOT16: | |
4348 | case elfcpp::R_POWERPC_GOT16_LO: | |
4349 | case elfcpp::R_POWERPC_GOT16_HI: | |
4350 | case elfcpp::R_POWERPC_GOT16_HA: | |
4351 | case elfcpp::R_PPC64_GOT16_DS: | |
4352 | case elfcpp::R_PPC64_GOT16_LO_DS: | |
4353 | return true; | |
4354 | ||
4355 | // So are function calls. | |
4356 | case elfcpp::R_POWERPC_ADDR24: | |
4357 | case elfcpp::R_POWERPC_ADDR14: | |
4358 | case elfcpp::R_POWERPC_ADDR14_BRTAKEN: | |
4359 | case elfcpp::R_POWERPC_ADDR14_BRNTAKEN: | |
4360 | case elfcpp::R_POWERPC_REL24: | |
4361 | case elfcpp::R_PPC_PLTREL24: | |
4362 | case elfcpp::R_POWERPC_REL14: | |
4363 | case elfcpp::R_POWERPC_REL14_BRTAKEN: | |
4364 | case elfcpp::R_POWERPC_REL14_BRNTAKEN: | |
4365 | return true; | |
4366 | ||
4367 | default: | |
4368 | break; | |
4369 | } | |
4370 | ||
4371 | // Anything else is a problem. | |
4372 | // If we are building a static executable, the libc startup function | |
4373 | // responsible for applying indirect function relocations is going | |
4374 | // to complain about the reloc type. | |
4375 | // If we are building a dynamic executable, we will have a text | |
4376 | // relocation. The dynamic loader will set the text segment | |
4377 | // writable and non-executable to apply text relocations. So we'll | |
4378 | // segfault when trying to run the indirection function to resolve | |
4379 | // the reloc. | |
4380 | gold_error(_("%s: unsupported reloc %u for IFUNC symbol"), | |
4381 | object->name().c_str(), r_type); | |
4382 | return false; | |
4383 | } | |
4384 | ||
42cacb20 DE |
4385 | // Scan a relocation for a local symbol. |
4386 | ||
4387 | template<int size, bool big_endian> | |
4388 | inline void | |
4389 | Target_powerpc<size, big_endian>::Scan::local( | |
d83ce4e3 AM |
4390 | Symbol_table* symtab, |
4391 | Layout* layout, | |
4392 | Target_powerpc<size, big_endian>* target, | |
4393 | Sized_relobj_file<size, big_endian>* object, | |
4394 | unsigned int data_shndx, | |
4395 | Output_section* output_section, | |
4396 | const elfcpp::Rela<size, big_endian>& reloc, | |
4397 | unsigned int r_type, | |
e5d5f5ed | 4398 | const elfcpp::Sym<size, big_endian>& lsym, |
bfdfa4cd | 4399 | bool is_discarded) |
42cacb20 | 4400 | { |
dd93cd0a AM |
4401 | Powerpc_relobj<size, big_endian>* ppc_object |
4402 | = static_cast<Powerpc_relobj<size, big_endian>*>(object); | |
4403 | ||
bfdfa4cd AM |
4404 | if (is_discarded) |
4405 | { | |
4406 | if (size == 64 | |
4407 | && data_shndx == ppc_object->opd_shndx() | |
4408 | && r_type == elfcpp::R_PPC64_ADDR64) | |
4409 | ppc_object->set_opd_discard(reloc.get_r_offset()); | |
4410 | return; | |
4411 | } | |
4412 | ||
e5d5f5ed AM |
4413 | // A local STT_GNU_IFUNC symbol may require a PLT entry. |
4414 | bool is_ifunc = lsym.get_st_type() == elfcpp::STT_GNU_IFUNC; | |
4415 | if (is_ifunc && this->reloc_needs_plt_for_ifunc(object, r_type)) | |
40b469d7 | 4416 | { |
ec661b9d AM |
4417 | unsigned int r_sym = elfcpp::elf_r_sym<size>(reloc.get_r_info()); |
4418 | target->push_branch(ppc_object, data_shndx, reloc.get_r_offset(), | |
4419 | r_type, r_sym, reloc.get_r_addend()); | |
4420 | target->make_local_ifunc_plt_entry(symtab, layout, object, r_sym); | |
40b469d7 | 4421 | } |
e5d5f5ed | 4422 | |
42cacb20 DE |
4423 | switch (r_type) |
4424 | { | |
4425 | case elfcpp::R_POWERPC_NONE: | |
4426 | case elfcpp::R_POWERPC_GNU_VTINHERIT: | |
4427 | case elfcpp::R_POWERPC_GNU_VTENTRY: | |
6ce78956 | 4428 | case elfcpp::R_PPC64_TOCSAVE: |
dd93cd0a | 4429 | case elfcpp::R_PPC_EMB_MRKREF: |
7404fe1b | 4430 | case elfcpp::R_POWERPC_TLS: |
dd93cd0a AM |
4431 | break; |
4432 | ||
4433 | case elfcpp::R_PPC64_TOC: | |
4434 | { | |
4435 | Output_data_got_powerpc<size, big_endian>* got | |
4436 | = target->got_section(symtab, layout); | |
4437 | if (parameters->options().output_is_position_independent()) | |
4438 | { | |
bfdfa4cd AM |
4439 | Address off = reloc.get_r_offset(); |
4440 | if (size == 64 | |
4441 | && data_shndx == ppc_object->opd_shndx() | |
4442 | && ppc_object->get_opd_discard(off - 8)) | |
4443 | break; | |
4444 | ||
dd93cd0a | 4445 | Reloc_section* rela_dyn = target->rela_dyn_section(layout); |
bfdfa4cd | 4446 | Powerpc_relobj<size, big_endian>* symobj = ppc_object; |
dd93cd0a AM |
4447 | rela_dyn->add_output_section_relative(got->output_section(), |
4448 | elfcpp::R_POWERPC_RELATIVE, | |
4449 | output_section, | |
bfdfa4cd AM |
4450 | object, data_shndx, off, |
4451 | symobj->toc_base_offset()); | |
dd93cd0a AM |
4452 | } |
4453 | } | |
42cacb20 DE |
4454 | break; |
4455 | ||
4456 | case elfcpp::R_PPC64_ADDR64: | |
dd93cd0a | 4457 | case elfcpp::R_PPC64_UADDR64: |
42cacb20 | 4458 | case elfcpp::R_POWERPC_ADDR32: |
dd93cd0a AM |
4459 | case elfcpp::R_POWERPC_UADDR32: |
4460 | case elfcpp::R_POWERPC_ADDR24: | |
c9269dff | 4461 | case elfcpp::R_POWERPC_ADDR16: |
42cacb20 | 4462 | case elfcpp::R_POWERPC_ADDR16_LO: |
c9269dff AM |
4463 | case elfcpp::R_POWERPC_ADDR16_HI: |
4464 | case elfcpp::R_POWERPC_ADDR16_HA: | |
dd93cd0a AM |
4465 | case elfcpp::R_POWERPC_UADDR16: |
4466 | case elfcpp::R_PPC64_ADDR16_HIGHER: | |
4467 | case elfcpp::R_PPC64_ADDR16_HIGHERA: | |
4468 | case elfcpp::R_PPC64_ADDR16_HIGHEST: | |
4469 | case elfcpp::R_PPC64_ADDR16_HIGHESTA: | |
4470 | case elfcpp::R_PPC64_ADDR16_DS: | |
4471 | case elfcpp::R_PPC64_ADDR16_LO_DS: | |
4472 | case elfcpp::R_POWERPC_ADDR14: | |
4473 | case elfcpp::R_POWERPC_ADDR14_BRTAKEN: | |
4474 | case elfcpp::R_POWERPC_ADDR14_BRNTAKEN: | |
42cacb20 DE |
4475 | // If building a shared library (or a position-independent |
4476 | // executable), we need to create a dynamic relocation for | |
4477 | // this location. | |
c9824451 AM |
4478 | if (parameters->options().output_is_position_independent() |
4479 | || (size == 64 && is_ifunc)) | |
2e702c99 RM |
4480 | { |
4481 | Reloc_section* rela_dyn = target->rela_dyn_section(layout); | |
42cacb20 | 4482 | |
dd93cd0a AM |
4483 | if ((size == 32 && r_type == elfcpp::R_POWERPC_ADDR32) |
4484 | || (size == 64 && r_type == elfcpp::R_PPC64_ADDR64)) | |
2e702c99 RM |
4485 | { |
4486 | unsigned int r_sym = elfcpp::elf_r_sym<size>(reloc.get_r_info()); | |
e5d5f5ed AM |
4487 | unsigned int dynrel = elfcpp::R_POWERPC_RELATIVE; |
4488 | if (is_ifunc) | |
4489 | { | |
4490 | rela_dyn = target->iplt_section()->rel_plt(); | |
4491 | dynrel = elfcpp::R_POWERPC_IRELATIVE; | |
4492 | } | |
4493 | rela_dyn->add_local_relative(object, r_sym, dynrel, | |
dd93cd0a AM |
4494 | output_section, data_shndx, |
4495 | reloc.get_r_offset(), | |
c9824451 | 4496 | reloc.get_r_addend(), false); |
2e702c99 RM |
4497 | } |
4498 | else | |
4499 | { | |
dd93cd0a | 4500 | check_non_pic(object, r_type); |
42cacb20 | 4501 | unsigned int r_sym = elfcpp::elf_r_sym<size>(reloc.get_r_info()); |
dd93cd0a AM |
4502 | rela_dyn->add_local(object, r_sym, r_type, output_section, |
4503 | data_shndx, reloc.get_r_offset(), | |
4504 | reloc.get_r_addend()); | |
2e702c99 RM |
4505 | } |
4506 | } | |
42cacb20 DE |
4507 | break; |
4508 | ||
4509 | case elfcpp::R_POWERPC_REL24: | |
c9824451 | 4510 | case elfcpp::R_PPC_PLTREL24: |
42cacb20 | 4511 | case elfcpp::R_PPC_LOCAL24PC: |
ec661b9d AM |
4512 | target->push_branch(ppc_object, data_shndx, reloc.get_r_offset(), |
4513 | r_type, elfcpp::elf_r_sym<size>(reloc.get_r_info()), | |
4514 | reloc.get_r_addend()); | |
4515 | break; | |
4516 | ||
4517 | case elfcpp::R_POWERPC_REL14: | |
4518 | case elfcpp::R_POWERPC_REL14_BRTAKEN: | |
4519 | case elfcpp::R_POWERPC_REL14_BRNTAKEN: | |
4520 | target->push_branch(ppc_object, data_shndx, reloc.get_r_offset(), | |
4521 | r_type, elfcpp::elf_r_sym<size>(reloc.get_r_info()), | |
4522 | reloc.get_r_addend()); | |
4523 | break; | |
4524 | ||
4525 | case elfcpp::R_PPC64_REL64: | |
4526 | case elfcpp::R_POWERPC_REL32: | |
dd93cd0a | 4527 | case elfcpp::R_POWERPC_REL16: |
6ce78956 | 4528 | case elfcpp::R_POWERPC_REL16_LO: |
dd93cd0a | 4529 | case elfcpp::R_POWERPC_REL16_HI: |
6ce78956 | 4530 | case elfcpp::R_POWERPC_REL16_HA: |
dd93cd0a AM |
4531 | case elfcpp::R_POWERPC_SECTOFF: |
4532 | case elfcpp::R_POWERPC_TPREL16: | |
4533 | case elfcpp::R_POWERPC_DTPREL16: | |
4534 | case elfcpp::R_POWERPC_SECTOFF_LO: | |
4535 | case elfcpp::R_POWERPC_TPREL16_LO: | |
4536 | case elfcpp::R_POWERPC_DTPREL16_LO: | |
4537 | case elfcpp::R_POWERPC_SECTOFF_HI: | |
4538 | case elfcpp::R_POWERPC_TPREL16_HI: | |
4539 | case elfcpp::R_POWERPC_DTPREL16_HI: | |
4540 | case elfcpp::R_POWERPC_SECTOFF_HA: | |
4541 | case elfcpp::R_POWERPC_TPREL16_HA: | |
4542 | case elfcpp::R_POWERPC_DTPREL16_HA: | |
4543 | case elfcpp::R_PPC64_DTPREL16_HIGHER: | |
4544 | case elfcpp::R_PPC64_TPREL16_HIGHER: | |
4545 | case elfcpp::R_PPC64_DTPREL16_HIGHERA: | |
4546 | case elfcpp::R_PPC64_TPREL16_HIGHERA: | |
4547 | case elfcpp::R_PPC64_DTPREL16_HIGHEST: | |
4548 | case elfcpp::R_PPC64_TPREL16_HIGHEST: | |
4549 | case elfcpp::R_PPC64_DTPREL16_HIGHESTA: | |
4550 | case elfcpp::R_PPC64_TPREL16_HIGHESTA: | |
4551 | case elfcpp::R_PPC64_TPREL16_DS: | |
4552 | case elfcpp::R_PPC64_TPREL16_LO_DS: | |
4553 | case elfcpp::R_PPC64_DTPREL16_DS: | |
4554 | case elfcpp::R_PPC64_DTPREL16_LO_DS: | |
4555 | case elfcpp::R_PPC64_SECTOFF_DS: | |
4556 | case elfcpp::R_PPC64_SECTOFF_LO_DS: | |
4557 | case elfcpp::R_PPC64_TLSGD: | |
4558 | case elfcpp::R_PPC64_TLSLD: | |
42cacb20 DE |
4559 | break; |
4560 | ||
4561 | case elfcpp::R_POWERPC_GOT16: | |
4562 | case elfcpp::R_POWERPC_GOT16_LO: | |
4563 | case elfcpp::R_POWERPC_GOT16_HI: | |
4564 | case elfcpp::R_POWERPC_GOT16_HA: | |
dd93cd0a AM |
4565 | case elfcpp::R_PPC64_GOT16_DS: |
4566 | case elfcpp::R_PPC64_GOT16_LO_DS: | |
42cacb20 | 4567 | { |
c9269dff | 4568 | // The symbol requires a GOT entry. |
dd93cd0a AM |
4569 | Output_data_got_powerpc<size, big_endian>* got |
4570 | = target->got_section(symtab, layout); | |
4571 | unsigned int r_sym = elfcpp::elf_r_sym<size>(reloc.get_r_info()); | |
42cacb20 | 4572 | |
e5d5f5ed | 4573 | if (!parameters->options().output_is_position_independent()) |
42cacb20 | 4574 | { |
e5d5f5ed AM |
4575 | if (size == 32 && is_ifunc) |
4576 | got->add_local_plt(object, r_sym, GOT_TYPE_STANDARD); | |
4577 | else | |
4578 | got->add_local(object, r_sym, GOT_TYPE_STANDARD); | |
4579 | } | |
4580 | else if (!object->local_has_got_offset(r_sym, GOT_TYPE_STANDARD)) | |
4581 | { | |
4582 | // If we are generating a shared object or a pie, this | |
4583 | // symbol's GOT entry will be set by a dynamic relocation. | |
4584 | unsigned int off; | |
4585 | off = got->add_constant(0); | |
4586 | object->set_local_got_offset(r_sym, GOT_TYPE_STANDARD, off); | |
42cacb20 | 4587 | |
e5d5f5ed AM |
4588 | Reloc_section* rela_dyn = target->rela_dyn_section(layout); |
4589 | unsigned int dynrel = elfcpp::R_POWERPC_RELATIVE; | |
4590 | if (is_ifunc) | |
4591 | { | |
4592 | rela_dyn = target->iplt_section()->rel_plt(); | |
4593 | dynrel = elfcpp::R_POWERPC_IRELATIVE; | |
42cacb20 | 4594 | } |
e5d5f5ed | 4595 | rela_dyn->add_local_relative(object, r_sym, dynrel, |
c9824451 | 4596 | got, off, 0, false); |
2e702c99 | 4597 | } |
42cacb20 DE |
4598 | } |
4599 | break; | |
4600 | ||
cf43a2fe AM |
4601 | case elfcpp::R_PPC64_TOC16: |
4602 | case elfcpp::R_PPC64_TOC16_LO: | |
4603 | case elfcpp::R_PPC64_TOC16_HI: | |
4604 | case elfcpp::R_PPC64_TOC16_HA: | |
4605 | case elfcpp::R_PPC64_TOC16_DS: | |
4606 | case elfcpp::R_PPC64_TOC16_LO_DS: | |
42cacb20 DE |
4607 | // We need a GOT section. |
4608 | target->got_section(symtab, layout); | |
4609 | break; | |
4610 | ||
dd93cd0a AM |
4611 | case elfcpp::R_POWERPC_GOT_TLSGD16: |
4612 | case elfcpp::R_POWERPC_GOT_TLSGD16_LO: | |
4613 | case elfcpp::R_POWERPC_GOT_TLSGD16_HI: | |
4614 | case elfcpp::R_POWERPC_GOT_TLSGD16_HA: | |
4615 | { | |
4616 | const tls::Tls_optimization tls_type = target->optimize_tls_gd(true); | |
4617 | if (tls_type == tls::TLSOPT_NONE) | |
4618 | { | |
4619 | Output_data_got_powerpc<size, big_endian>* got | |
4620 | = target->got_section(symtab, layout); | |
4621 | unsigned int r_sym = elfcpp::elf_r_sym<size>(reloc.get_r_info()); | |
bd73a62d AM |
4622 | Reloc_section* rela_dyn = target->rela_dyn_section(layout); |
4623 | got->add_local_tls_pair(object, r_sym, GOT_TYPE_TLSGD, | |
4624 | rela_dyn, elfcpp::R_POWERPC_DTPMOD); | |
dd93cd0a AM |
4625 | } |
4626 | else if (tls_type == tls::TLSOPT_TO_LE) | |
4627 | { | |
4628 | // no GOT relocs needed for Local Exec. | |
4629 | } | |
4630 | else | |
4631 | gold_unreachable(); | |
4632 | } | |
42cacb20 DE |
4633 | break; |
4634 | ||
dd93cd0a AM |
4635 | case elfcpp::R_POWERPC_GOT_TLSLD16: |
4636 | case elfcpp::R_POWERPC_GOT_TLSLD16_LO: | |
4637 | case elfcpp::R_POWERPC_GOT_TLSLD16_HI: | |
4638 | case elfcpp::R_POWERPC_GOT_TLSLD16_HA: | |
4639 | { | |
4640 | const tls::Tls_optimization tls_type = target->optimize_tls_ld(); | |
4641 | if (tls_type == tls::TLSOPT_NONE) | |
4642 | target->tlsld_got_offset(symtab, layout, object); | |
4643 | else if (tls_type == tls::TLSOPT_TO_LE) | |
4644 | { | |
4645 | // no GOT relocs needed for Local Exec. | |
7404fe1b AM |
4646 | if (parameters->options().emit_relocs()) |
4647 | { | |
4648 | Output_section* os = layout->tls_segment()->first_section(); | |
4649 | gold_assert(os != NULL); | |
4650 | os->set_needs_symtab_index(); | |
4651 | } | |
dd93cd0a AM |
4652 | } |
4653 | else | |
4654 | gold_unreachable(); | |
4655 | } | |
42cacb20 | 4656 | break; |
42cacb20 | 4657 | |
dd93cd0a AM |
4658 | case elfcpp::R_POWERPC_GOT_DTPREL16: |
4659 | case elfcpp::R_POWERPC_GOT_DTPREL16_LO: | |
4660 | case elfcpp::R_POWERPC_GOT_DTPREL16_HI: | |
4661 | case elfcpp::R_POWERPC_GOT_DTPREL16_HA: | |
4662 | { | |
4663 | Output_data_got_powerpc<size, big_endian>* got | |
4664 | = target->got_section(symtab, layout); | |
4665 | unsigned int r_sym = elfcpp::elf_r_sym<size>(reloc.get_r_info()); | |
bd73a62d | 4666 | got->add_local_tls(object, r_sym, GOT_TYPE_DTPREL); |
dd93cd0a AM |
4667 | } |
4668 | break; | |
42cacb20 | 4669 | |
dd93cd0a AM |
4670 | case elfcpp::R_POWERPC_GOT_TPREL16: |
4671 | case elfcpp::R_POWERPC_GOT_TPREL16_LO: | |
4672 | case elfcpp::R_POWERPC_GOT_TPREL16_HI: | |
4673 | case elfcpp::R_POWERPC_GOT_TPREL16_HA: | |
4674 | { | |
4675 | const tls::Tls_optimization tls_type = target->optimize_tls_ie(true); | |
4676 | if (tls_type == tls::TLSOPT_NONE) | |
4677 | { | |
dd93cd0a | 4678 | unsigned int r_sym = elfcpp::elf_r_sym<size>(reloc.get_r_info()); |
acc276d8 AM |
4679 | if (!object->local_has_got_offset(r_sym, GOT_TYPE_TPREL)) |
4680 | { | |
4681 | Output_data_got_powerpc<size, big_endian>* got | |
4682 | = target->got_section(symtab, layout); | |
4683 | unsigned int off = got->add_constant(0); | |
4684 | object->set_local_got_offset(r_sym, GOT_TYPE_TPREL, off); | |
4685 | ||
4686 | Reloc_section* rela_dyn = target->rela_dyn_section(layout); | |
4687 | rela_dyn->add_symbolless_local_addend(object, r_sym, | |
4688 | elfcpp::R_POWERPC_TPREL, | |
4689 | got, off, 0); | |
4690 | } | |
dd93cd0a AM |
4691 | } |
4692 | else if (tls_type == tls::TLSOPT_TO_LE) | |
4693 | { | |
4694 | // no GOT relocs needed for Local Exec. | |
4695 | } | |
4696 | else | |
4697 | gold_unreachable(); | |
4698 | } | |
4699 | break; | |
4700 | ||
4701 | default: | |
4702 | unsupported_reloc_local(object, r_type); | |
4703 | break; | |
4704 | } | |
d8f5a274 AM |
4705 | |
4706 | switch (r_type) | |
4707 | { | |
4708 | case elfcpp::R_POWERPC_GOT_TLSLD16: | |
4709 | case elfcpp::R_POWERPC_GOT_TLSGD16: | |
4710 | case elfcpp::R_POWERPC_GOT_TPREL16: | |
4711 | case elfcpp::R_POWERPC_GOT_DTPREL16: | |
4712 | case elfcpp::R_POWERPC_GOT16: | |
4713 | case elfcpp::R_PPC64_GOT16_DS: | |
4714 | case elfcpp::R_PPC64_TOC16: | |
4715 | case elfcpp::R_PPC64_TOC16_DS: | |
4716 | ppc_object->set_has_small_toc_reloc(); | |
4717 | default: | |
4718 | break; | |
4719 | } | |
dd93cd0a AM |
4720 | } |
4721 | ||
4722 | // Report an unsupported relocation against a global symbol. | |
4723 | ||
4724 | template<int size, bool big_endian> | |
4725 | void | |
4726 | Target_powerpc<size, big_endian>::Scan::unsupported_reloc_global( | |
4727 | Sized_relobj_file<size, big_endian>* object, | |
4728 | unsigned int r_type, | |
4729 | Symbol* gsym) | |
4730 | { | |
42cacb20 DE |
4731 | gold_error(_("%s: unsupported reloc %u against global symbol %s"), |
4732 | object->name().c_str(), r_type, gsym->demangled_name().c_str()); | |
4733 | } | |
4734 | ||
4735 | // Scan a relocation for a global symbol. | |
4736 | ||
4737 | template<int size, bool big_endian> | |
4738 | inline void | |
4739 | Target_powerpc<size, big_endian>::Scan::global( | |
d83ce4e3 AM |
4740 | Symbol_table* symtab, |
4741 | Layout* layout, | |
4742 | Target_powerpc<size, big_endian>* target, | |
4743 | Sized_relobj_file<size, big_endian>* object, | |
4744 | unsigned int data_shndx, | |
4745 | Output_section* output_section, | |
4746 | const elfcpp::Rela<size, big_endian>& reloc, | |
4747 | unsigned int r_type, | |
4748 | Symbol* gsym) | |
42cacb20 | 4749 | { |
dd93cd0a AM |
4750 | Powerpc_relobj<size, big_endian>* ppc_object |
4751 | = static_cast<Powerpc_relobj<size, big_endian>*>(object); | |
4752 | ||
e5d5f5ed AM |
4753 | // A STT_GNU_IFUNC symbol may require a PLT entry. |
4754 | if (gsym->type() == elfcpp::STT_GNU_IFUNC | |
4755 | && this->reloc_needs_plt_for_ifunc(object, r_type)) | |
ec661b9d AM |
4756 | { |
4757 | target->push_branch(ppc_object, data_shndx, reloc.get_r_offset(), | |
4758 | r_type, elfcpp::elf_r_sym<size>(reloc.get_r_info()), | |
4759 | reloc.get_r_addend()); | |
4760 | target->make_plt_entry(symtab, layout, gsym); | |
4761 | } | |
e5d5f5ed | 4762 | |
42cacb20 DE |
4763 | switch (r_type) |
4764 | { | |
4765 | case elfcpp::R_POWERPC_NONE: | |
4766 | case elfcpp::R_POWERPC_GNU_VTINHERIT: | |
4767 | case elfcpp::R_POWERPC_GNU_VTENTRY: | |
cf43a2fe | 4768 | case elfcpp::R_PPC_LOCAL24PC: |
dd93cd0a | 4769 | case elfcpp::R_PPC_EMB_MRKREF: |
7404fe1b | 4770 | case elfcpp::R_POWERPC_TLS: |
dd93cd0a AM |
4771 | break; |
4772 | ||
4773 | case elfcpp::R_PPC64_TOC: | |
4774 | { | |
4775 | Output_data_got_powerpc<size, big_endian>* got | |
4776 | = target->got_section(symtab, layout); | |
4777 | if (parameters->options().output_is_position_independent()) | |
4778 | { | |
bfdfa4cd AM |
4779 | Address off = reloc.get_r_offset(); |
4780 | if (size == 64 | |
4781 | && data_shndx == ppc_object->opd_shndx() | |
4782 | && ppc_object->get_opd_discard(off - 8)) | |
4783 | break; | |
4784 | ||
dd93cd0a AM |
4785 | Reloc_section* rela_dyn = target->rela_dyn_section(layout); |
4786 | Powerpc_relobj<size, big_endian>* symobj = ppc_object; | |
4787 | if (data_shndx != ppc_object->opd_shndx()) | |
4788 | symobj = static_cast | |
4789 | <Powerpc_relobj<size, big_endian>*>(gsym->object()); | |
4790 | rela_dyn->add_output_section_relative(got->output_section(), | |
4791 | elfcpp::R_POWERPC_RELATIVE, | |
4792 | output_section, | |
bfdfa4cd | 4793 | object, data_shndx, off, |
dd93cd0a AM |
4794 | symobj->toc_base_offset()); |
4795 | } | |
4796 | } | |
42cacb20 DE |
4797 | break; |
4798 | ||
c9269dff | 4799 | case elfcpp::R_PPC64_ADDR64: |
bfdfa4cd AM |
4800 | if (size == 64 |
4801 | && data_shndx == ppc_object->opd_shndx() | |
4802 | && (gsym->is_defined_in_discarded_section() | |
4803 | || gsym->object() != object)) | |
4804 | { | |
4805 | ppc_object->set_opd_discard(reloc.get_r_offset()); | |
4806 | break; | |
4807 | } | |
4808 | // Fall thru | |
dd93cd0a | 4809 | case elfcpp::R_PPC64_UADDR64: |
c9269dff | 4810 | case elfcpp::R_POWERPC_ADDR32: |
dd93cd0a AM |
4811 | case elfcpp::R_POWERPC_UADDR32: |
4812 | case elfcpp::R_POWERPC_ADDR24: | |
42cacb20 DE |
4813 | case elfcpp::R_POWERPC_ADDR16: |
4814 | case elfcpp::R_POWERPC_ADDR16_LO: | |
4815 | case elfcpp::R_POWERPC_ADDR16_HI: | |
4816 | case elfcpp::R_POWERPC_ADDR16_HA: | |
dd93cd0a AM |
4817 | case elfcpp::R_POWERPC_UADDR16: |
4818 | case elfcpp::R_PPC64_ADDR16_HIGHER: | |
4819 | case elfcpp::R_PPC64_ADDR16_HIGHERA: | |
4820 | case elfcpp::R_PPC64_ADDR16_HIGHEST: | |
4821 | case elfcpp::R_PPC64_ADDR16_HIGHESTA: | |
4822 | case elfcpp::R_PPC64_ADDR16_DS: | |
4823 | case elfcpp::R_PPC64_ADDR16_LO_DS: | |
4824 | case elfcpp::R_POWERPC_ADDR14: | |
4825 | case elfcpp::R_POWERPC_ADDR14_BRTAKEN: | |
4826 | case elfcpp::R_POWERPC_ADDR14_BRNTAKEN: | |
42cacb20 | 4827 | { |
c9269dff AM |
4828 | // Make a PLT entry if necessary. |
4829 | if (gsym->needs_plt_entry()) | |
4830 | { | |
ec661b9d AM |
4831 | target->push_branch(ppc_object, data_shndx, reloc.get_r_offset(), |
4832 | r_type, | |
4833 | elfcpp::elf_r_sym<size>(reloc.get_r_info()), | |
4834 | reloc.get_r_addend()); | |
4835 | target->make_plt_entry(symtab, layout, gsym); | |
2e702c99 RM |
4836 | // Since this is not a PC-relative relocation, we may be |
4837 | // taking the address of a function. In that case we need to | |
4838 | // set the entry in the dynamic symbol table to the address of | |
e5d5f5ed | 4839 | // the PLT call stub. |
cf43a2fe | 4840 | if (size == 32 |
e5d5f5ed AM |
4841 | && gsym->is_from_dynobj() |
4842 | && !parameters->options().output_is_position_independent()) | |
2e702c99 | 4843 | gsym->set_needs_dynsym_value(); |
c9269dff AM |
4844 | } |
4845 | // Make a dynamic relocation if necessary. | |
c9824451 AM |
4846 | if (needs_dynamic_reloc<size>(gsym, Scan::get_reference_flags(r_type)) |
4847 | || (size == 64 && gsym->type() == elfcpp::STT_GNU_IFUNC)) | |
c9269dff AM |
4848 | { |
4849 | if (gsym->may_need_copy_reloc()) | |
4850 | { | |
4851 | target->copy_reloc(symtab, layout, object, | |
4852 | data_shndx, output_section, gsym, reloc); | |
4853 | } | |
627b30b7 AM |
4854 | else if ((size == 32 |
4855 | && r_type == elfcpp::R_POWERPC_ADDR32 | |
4856 | && gsym->can_use_relative_reloc(false) | |
4857 | && !(gsym->visibility() == elfcpp::STV_PROTECTED | |
4858 | && parameters->options().shared())) | |
4859 | || (size == 64 | |
4860 | && r_type == elfcpp::R_PPC64_ADDR64 | |
4861 | && (gsym->can_use_relative_reloc(false) | |
4862 | || data_shndx == ppc_object->opd_shndx()))) | |
2e702c99 RM |
4863 | { |
4864 | Reloc_section* rela_dyn = target->rela_dyn_section(layout); | |
e5d5f5ed AM |
4865 | unsigned int dynrel = elfcpp::R_POWERPC_RELATIVE; |
4866 | if (gsym->type() == elfcpp::STT_GNU_IFUNC) | |
4867 | { | |
4868 | rela_dyn = target->iplt_section()->rel_plt(); | |
4869 | dynrel = elfcpp::R_POWERPC_IRELATIVE; | |
4870 | } | |
4871 | rela_dyn->add_symbolless_global_addend( | |
4872 | gsym, dynrel, output_section, object, data_shndx, | |
4873 | reloc.get_r_offset(), reloc.get_r_addend()); | |
2e702c99 RM |
4874 | } |
4875 | else | |
4876 | { | |
4877 | Reloc_section* rela_dyn = target->rela_dyn_section(layout); | |
42cacb20 | 4878 | check_non_pic(object, r_type); |
dd93cd0a AM |
4879 | rela_dyn->add_global(gsym, r_type, output_section, |
4880 | object, data_shndx, | |
4881 | reloc.get_r_offset(), | |
4882 | reloc.get_r_addend()); | |
2e702c99 RM |
4883 | } |
4884 | } | |
42cacb20 DE |
4885 | } |
4886 | break; | |
4887 | ||
cf43a2fe | 4888 | case elfcpp::R_PPC_PLTREL24: |
42cacb20 | 4889 | case elfcpp::R_POWERPC_REL24: |
ec661b9d AM |
4890 | target->push_branch(ppc_object, data_shndx, reloc.get_r_offset(), |
4891 | r_type, elfcpp::elf_r_sym<size>(reloc.get_r_info()), | |
4892 | reloc.get_r_addend()); | |
3ea0a085 AM |
4893 | if (gsym->needs_plt_entry() |
4894 | || (!gsym->final_value_is_known() | |
4895 | && (gsym->is_undefined() | |
4896 | || gsym->is_from_dynobj() | |
4897 | || gsym->is_preemptible()))) | |
ec661b9d | 4898 | target->make_plt_entry(symtab, layout, gsym); |
3ea0a085 | 4899 | // Fall thru |
42cacb20 | 4900 | |
3ea0a085 | 4901 | case elfcpp::R_PPC64_REL64: |
dd93cd0a | 4902 | case elfcpp::R_POWERPC_REL32: |
3ea0a085 AM |
4903 | // Make a dynamic relocation if necessary. |
4904 | if (needs_dynamic_reloc<size>(gsym, Scan::get_reference_flags(r_type))) | |
4905 | { | |
4906 | if (gsym->may_need_copy_reloc()) | |
4907 | { | |
4908 | target->copy_reloc(symtab, layout, object, | |
4909 | data_shndx, output_section, gsym, | |
4910 | reloc); | |
4911 | } | |
4912 | else | |
4913 | { | |
4914 | Reloc_section* rela_dyn = target->rela_dyn_section(layout); | |
4915 | check_non_pic(object, r_type); | |
4916 | rela_dyn->add_global(gsym, r_type, output_section, object, | |
4917 | data_shndx, reloc.get_r_offset(), | |
4918 | reloc.get_r_addend()); | |
4919 | } | |
4920 | } | |
4921 | break; | |
4922 | ||
ec661b9d AM |
4923 | case elfcpp::R_POWERPC_REL14: |
4924 | case elfcpp::R_POWERPC_REL14_BRTAKEN: | |
4925 | case elfcpp::R_POWERPC_REL14_BRNTAKEN: | |
4926 | target->push_branch(ppc_object, data_shndx, reloc.get_r_offset(), | |
4927 | r_type, elfcpp::elf_r_sym<size>(reloc.get_r_info()), | |
4928 | reloc.get_r_addend()); | |
4929 | break; | |
4930 | ||
6ce78956 AM |
4931 | case elfcpp::R_POWERPC_REL16: |
4932 | case elfcpp::R_POWERPC_REL16_LO: | |
4933 | case elfcpp::R_POWERPC_REL16_HI: | |
4934 | case elfcpp::R_POWERPC_REL16_HA: | |
dd93cd0a AM |
4935 | case elfcpp::R_POWERPC_SECTOFF: |
4936 | case elfcpp::R_POWERPC_TPREL16: | |
4937 | case elfcpp::R_POWERPC_DTPREL16: | |
4938 | case elfcpp::R_POWERPC_SECTOFF_LO: | |
4939 | case elfcpp::R_POWERPC_TPREL16_LO: | |
4940 | case elfcpp::R_POWERPC_DTPREL16_LO: | |
4941 | case elfcpp::R_POWERPC_SECTOFF_HI: | |
4942 | case elfcpp::R_POWERPC_TPREL16_HI: | |
4943 | case elfcpp::R_POWERPC_DTPREL16_HI: | |
4944 | case elfcpp::R_POWERPC_SECTOFF_HA: | |
4945 | case elfcpp::R_POWERPC_TPREL16_HA: | |
4946 | case elfcpp::R_POWERPC_DTPREL16_HA: | |
4947 | case elfcpp::R_PPC64_DTPREL16_HIGHER: | |
4948 | case elfcpp::R_PPC64_TPREL16_HIGHER: | |
4949 | case elfcpp::R_PPC64_DTPREL16_HIGHERA: | |
4950 | case elfcpp::R_PPC64_TPREL16_HIGHERA: | |
4951 | case elfcpp::R_PPC64_DTPREL16_HIGHEST: | |
4952 | case elfcpp::R_PPC64_TPREL16_HIGHEST: | |
4953 | case elfcpp::R_PPC64_DTPREL16_HIGHESTA: | |
4954 | case elfcpp::R_PPC64_TPREL16_HIGHESTA: | |
4955 | case elfcpp::R_PPC64_TPREL16_DS: | |
4956 | case elfcpp::R_PPC64_TPREL16_LO_DS: | |
4957 | case elfcpp::R_PPC64_DTPREL16_DS: | |
4958 | case elfcpp::R_PPC64_DTPREL16_LO_DS: | |
4959 | case elfcpp::R_PPC64_SECTOFF_DS: | |
4960 | case elfcpp::R_PPC64_SECTOFF_LO_DS: | |
4961 | case elfcpp::R_PPC64_TLSGD: | |
4962 | case elfcpp::R_PPC64_TLSLD: | |
cf43a2fe AM |
4963 | break; |
4964 | ||
42cacb20 DE |
4965 | case elfcpp::R_POWERPC_GOT16: |
4966 | case elfcpp::R_POWERPC_GOT16_LO: | |
4967 | case elfcpp::R_POWERPC_GOT16_HI: | |
4968 | case elfcpp::R_POWERPC_GOT16_HA: | |
dd93cd0a AM |
4969 | case elfcpp::R_PPC64_GOT16_DS: |
4970 | case elfcpp::R_PPC64_GOT16_LO_DS: | |
42cacb20 | 4971 | { |
c9269dff AM |
4972 | // The symbol requires a GOT entry. |
4973 | Output_data_got_powerpc<size, big_endian>* got; | |
42cacb20 DE |
4974 | |
4975 | got = target->got_section(symtab, layout); | |
2e702c99 | 4976 | if (gsym->final_value_is_known()) |
2e702c99 | 4977 | { |
e5d5f5ed AM |
4978 | if (size == 32 && gsym->type() == elfcpp::STT_GNU_IFUNC) |
4979 | got->add_global_plt(gsym, GOT_TYPE_STANDARD); | |
4980 | else | |
4981 | got->add_global(gsym, GOT_TYPE_STANDARD); | |
4982 | } | |
4983 | else if (!gsym->has_got_offset(GOT_TYPE_STANDARD)) | |
4984 | { | |
4985 | // If we are generating a shared object or a pie, this | |
4986 | // symbol's GOT entry will be set by a dynamic relocation. | |
4987 | unsigned int off = got->add_constant(0); | |
4988 | gsym->set_got_offset(GOT_TYPE_STANDARD, off); | |
4989 | ||
2e702c99 | 4990 | Reloc_section* rela_dyn = target->rela_dyn_section(layout); |
e5d5f5ed AM |
4991 | if (gsym->can_use_relative_reloc(false) |
4992 | && !(size == 32 | |
4993 | && gsym->visibility() == elfcpp::STV_PROTECTED | |
4994 | && parameters->options().shared())) | |
2e702c99 | 4995 | { |
e5d5f5ed AM |
4996 | unsigned int dynrel = elfcpp::R_POWERPC_RELATIVE; |
4997 | if (gsym->type() == elfcpp::STT_GNU_IFUNC) | |
4998 | { | |
4999 | rela_dyn = target->iplt_section()->rel_plt(); | |
5000 | dynrel = elfcpp::R_POWERPC_IRELATIVE; | |
5001 | } | |
5002 | rela_dyn->add_global_relative(gsym, dynrel, got, off, 0, false); | |
5003 | } | |
5004 | else | |
5005 | { | |
5006 | unsigned int dynrel = elfcpp::R_POWERPC_GLOB_DAT; | |
5007 | rela_dyn->add_global(gsym, dynrel, got, off, 0); | |
42cacb20 | 5008 | } |
2e702c99 | 5009 | } |
42cacb20 DE |
5010 | } |
5011 | break; | |
5012 | ||
cf43a2fe AM |
5013 | case elfcpp::R_PPC64_TOC16: |
5014 | case elfcpp::R_PPC64_TOC16_LO: | |
5015 | case elfcpp::R_PPC64_TOC16_HI: | |
5016 | case elfcpp::R_PPC64_TOC16_HA: | |
5017 | case elfcpp::R_PPC64_TOC16_DS: | |
5018 | case elfcpp::R_PPC64_TOC16_LO_DS: | |
42cacb20 DE |
5019 | // We need a GOT section. |
5020 | target->got_section(symtab, layout); | |
5021 | break; | |
5022 | ||
dd93cd0a AM |
5023 | case elfcpp::R_POWERPC_GOT_TLSGD16: |
5024 | case elfcpp::R_POWERPC_GOT_TLSGD16_LO: | |
5025 | case elfcpp::R_POWERPC_GOT_TLSGD16_HI: | |
5026 | case elfcpp::R_POWERPC_GOT_TLSGD16_HA: | |
5027 | { | |
5028 | const bool final = gsym->final_value_is_known(); | |
5029 | const tls::Tls_optimization tls_type = target->optimize_tls_gd(final); | |
5030 | if (tls_type == tls::TLSOPT_NONE) | |
5031 | { | |
5032 | Output_data_got_powerpc<size, big_endian>* got | |
5033 | = target->got_section(symtab, layout); | |
5034 | got->add_global_pair_with_rel(gsym, GOT_TYPE_TLSGD, | |
5035 | target->rela_dyn_section(layout), | |
5036 | elfcpp::R_POWERPC_DTPMOD, | |
5037 | elfcpp::R_POWERPC_DTPREL); | |
5038 | } | |
5039 | else if (tls_type == tls::TLSOPT_TO_IE) | |
5040 | { | |
acc276d8 AM |
5041 | if (!gsym->has_got_offset(GOT_TYPE_TPREL)) |
5042 | { | |
5043 | Output_data_got_powerpc<size, big_endian>* got | |
5044 | = target->got_section(symtab, layout); | |
5045 | Reloc_section* rela_dyn = target->rela_dyn_section(layout); | |
5046 | if (gsym->is_undefined() | |
5047 | || gsym->is_from_dynobj()) | |
5048 | { | |
5049 | got->add_global_with_rel(gsym, GOT_TYPE_TPREL, rela_dyn, | |
5050 | elfcpp::R_POWERPC_TPREL); | |
5051 | } | |
5052 | else | |
5053 | { | |
5054 | unsigned int off = got->add_constant(0); | |
5055 | gsym->set_got_offset(GOT_TYPE_TPREL, off); | |
5056 | unsigned int dynrel = elfcpp::R_POWERPC_TPREL; | |
5057 | rela_dyn->add_symbolless_global_addend(gsym, dynrel, | |
5058 | got, off, 0); | |
5059 | } | |
5060 | } | |
dd93cd0a AM |
5061 | } |
5062 | else if (tls_type == tls::TLSOPT_TO_LE) | |
5063 | { | |
5064 | // no GOT relocs needed for Local Exec. | |
5065 | } | |
5066 | else | |
5067 | gold_unreachable(); | |
5068 | } | |
42cacb20 DE |
5069 | break; |
5070 | ||
dd93cd0a AM |
5071 | case elfcpp::R_POWERPC_GOT_TLSLD16: |
5072 | case elfcpp::R_POWERPC_GOT_TLSLD16_LO: | |
5073 | case elfcpp::R_POWERPC_GOT_TLSLD16_HI: | |
5074 | case elfcpp::R_POWERPC_GOT_TLSLD16_HA: | |
5075 | { | |
5076 | const tls::Tls_optimization tls_type = target->optimize_tls_ld(); | |
5077 | if (tls_type == tls::TLSOPT_NONE) | |
5078 | target->tlsld_got_offset(symtab, layout, object); | |
5079 | else if (tls_type == tls::TLSOPT_TO_LE) | |
5080 | { | |
5081 | // no GOT relocs needed for Local Exec. | |
7404fe1b AM |
5082 | if (parameters->options().emit_relocs()) |
5083 | { | |
5084 | Output_section* os = layout->tls_segment()->first_section(); | |
5085 | gold_assert(os != NULL); | |
5086 | os->set_needs_symtab_index(); | |
5087 | } | |
dd93cd0a AM |
5088 | } |
5089 | else | |
5090 | gold_unreachable(); | |
5091 | } | |
5092 | break; | |
5093 | ||
5094 | case elfcpp::R_POWERPC_GOT_DTPREL16: | |
5095 | case elfcpp::R_POWERPC_GOT_DTPREL16_LO: | |
5096 | case elfcpp::R_POWERPC_GOT_DTPREL16_HI: | |
5097 | case elfcpp::R_POWERPC_GOT_DTPREL16_HA: | |
5098 | { | |
5099 | Output_data_got_powerpc<size, big_endian>* got | |
5100 | = target->got_section(symtab, layout); | |
bd73a62d AM |
5101 | if (!gsym->final_value_is_known() |
5102 | && (gsym->is_from_dynobj() | |
5103 | || gsym->is_undefined() | |
5104 | || gsym->is_preemptible())) | |
5105 | got->add_global_with_rel(gsym, GOT_TYPE_DTPREL, | |
5106 | target->rela_dyn_section(layout), | |
5107 | elfcpp::R_POWERPC_DTPREL); | |
5108 | else | |
5109 | got->add_global_tls(gsym, GOT_TYPE_DTPREL); | |
dd93cd0a AM |
5110 | } |
5111 | break; | |
5112 | ||
5113 | case elfcpp::R_POWERPC_GOT_TPREL16: | |
5114 | case elfcpp::R_POWERPC_GOT_TPREL16_LO: | |
5115 | case elfcpp::R_POWERPC_GOT_TPREL16_HI: | |
5116 | case elfcpp::R_POWERPC_GOT_TPREL16_HA: | |
5117 | { | |
5118 | const bool final = gsym->final_value_is_known(); | |
5119 | const tls::Tls_optimization tls_type = target->optimize_tls_ie(final); | |
5120 | if (tls_type == tls::TLSOPT_NONE) | |
5121 | { | |
acc276d8 AM |
5122 | if (!gsym->has_got_offset(GOT_TYPE_TPREL)) |
5123 | { | |
5124 | Output_data_got_powerpc<size, big_endian>* got | |
5125 | = target->got_section(symtab, layout); | |
5126 | Reloc_section* rela_dyn = target->rela_dyn_section(layout); | |
5127 | if (gsym->is_undefined() | |
5128 | || gsym->is_from_dynobj()) | |
5129 | { | |
5130 | got->add_global_with_rel(gsym, GOT_TYPE_TPREL, rela_dyn, | |
5131 | elfcpp::R_POWERPC_TPREL); | |
5132 | } | |
5133 | else | |
5134 | { | |
5135 | unsigned int off = got->add_constant(0); | |
5136 | gsym->set_got_offset(GOT_TYPE_TPREL, off); | |
5137 | unsigned int dynrel = elfcpp::R_POWERPC_TPREL; | |
5138 | rela_dyn->add_symbolless_global_addend(gsym, dynrel, | |
5139 | got, off, 0); | |
5140 | } | |
5141 | } | |
dd93cd0a AM |
5142 | } |
5143 | else if (tls_type == tls::TLSOPT_TO_LE) | |
5144 | { | |
5145 | // no GOT relocs needed for Local Exec. | |
5146 | } | |
5147 | else | |
5148 | gold_unreachable(); | |
5149 | } | |
42cacb20 DE |
5150 | break; |
5151 | ||
5152 | default: | |
5153 | unsupported_reloc_global(object, r_type, gsym); | |
5154 | break; | |
5155 | } | |
d8f5a274 AM |
5156 | |
5157 | switch (r_type) | |
5158 | { | |
5159 | case elfcpp::R_POWERPC_GOT_TLSLD16: | |
5160 | case elfcpp::R_POWERPC_GOT_TLSGD16: | |
5161 | case elfcpp::R_POWERPC_GOT_TPREL16: | |
5162 | case elfcpp::R_POWERPC_GOT_DTPREL16: | |
5163 | case elfcpp::R_POWERPC_GOT16: | |
5164 | case elfcpp::R_PPC64_GOT16_DS: | |
5165 | case elfcpp::R_PPC64_TOC16: | |
5166 | case elfcpp::R_PPC64_TOC16_DS: | |
5167 | ppc_object->set_has_small_toc_reloc(); | |
5168 | default: | |
5169 | break; | |
5170 | } | |
42cacb20 DE |
5171 | } |
5172 | ||
6d03d481 ST |
5173 | // Process relocations for gc. |
5174 | ||
5175 | template<int size, bool big_endian> | |
5176 | void | |
5177 | Target_powerpc<size, big_endian>::gc_process_relocs( | |
d83ce4e3 AM |
5178 | Symbol_table* symtab, |
5179 | Layout* layout, | |
5180 | Sized_relobj_file<size, big_endian>* object, | |
5181 | unsigned int data_shndx, | |
5182 | unsigned int, | |
5183 | const unsigned char* prelocs, | |
5184 | size_t reloc_count, | |
5185 | Output_section* output_section, | |
5186 | bool needs_special_offset_handling, | |
5187 | size_t local_symbol_count, | |
5188 | const unsigned char* plocal_symbols) | |
6d03d481 ST |
5189 | { |
5190 | typedef Target_powerpc<size, big_endian> Powerpc; | |
2ea97941 | 5191 | typedef typename Target_powerpc<size, big_endian>::Scan Scan; |
e81fea4d AM |
5192 | Powerpc_relobj<size, big_endian>* ppc_object |
5193 | = static_cast<Powerpc_relobj<size, big_endian>*>(object); | |
5194 | if (size == 64) | |
5195 | ppc_object->set_opd_valid(); | |
5196 | if (size == 64 && data_shndx == ppc_object->opd_shndx()) | |
5197 | { | |
5198 | typename Powerpc_relobj<size, big_endian>::Access_from::iterator p; | |
5199 | for (p = ppc_object->access_from_map()->begin(); | |
5200 | p != ppc_object->access_from_map()->end(); | |
5201 | ++p) | |
5202 | { | |
5203 | Address dst_off = p->first; | |
5204 | unsigned int dst_indx = ppc_object->get_opd_ent(dst_off); | |
5205 | typename Powerpc_relobj<size, big_endian>::Section_refs::iterator s; | |
5206 | for (s = p->second.begin(); s != p->second.end(); ++s) | |
5207 | { | |
5208 | Object* src_obj = s->first; | |
5209 | unsigned int src_indx = s->second; | |
5210 | symtab->gc()->add_reference(src_obj, src_indx, | |
5211 | ppc_object, dst_indx); | |
5212 | } | |
5213 | p->second.clear(); | |
5214 | } | |
5215 | ppc_object->access_from_map()->clear(); | |
c6de8ed4 | 5216 | ppc_object->process_gc_mark(symtab); |
e81fea4d AM |
5217 | // Don't look at .opd relocs as .opd will reference everything. |
5218 | return; | |
5219 | } | |
6d03d481 | 5220 | |
41cbeecc | 5221 | gold::gc_process_relocs<size, big_endian, Powerpc, elfcpp::SHT_RELA, Scan, |
3ff2ccb0 | 5222 | typename Target_powerpc::Relocatable_size_for_reloc>( |
6d03d481 ST |
5223 | symtab, |
5224 | layout, | |
5225 | this, | |
5226 | object, | |
5227 | data_shndx, | |
5228 | prelocs, | |
5229 | reloc_count, | |
5230 | output_section, | |
5231 | needs_special_offset_handling, | |
5232 | local_symbol_count, | |
5233 | plocal_symbols); | |
5234 | } | |
5235 | ||
e81fea4d AM |
5236 | // Handle target specific gc actions when adding a gc reference from |
5237 | // SRC_OBJ, SRC_SHNDX to a location specified by DST_OBJ, DST_SHNDX | |
5238 | // and DST_OFF. For powerpc64, this adds a referenc to the code | |
5239 | // section of a function descriptor. | |
5240 | ||
5241 | template<int size, bool big_endian> | |
5242 | void | |
5243 | Target_powerpc<size, big_endian>::do_gc_add_reference( | |
5244 | Symbol_table* symtab, | |
5245 | Object* src_obj, | |
5246 | unsigned int src_shndx, | |
5247 | Object* dst_obj, | |
5248 | unsigned int dst_shndx, | |
5249 | Address dst_off) const | |
5250 | { | |
5251 | Powerpc_relobj<size, big_endian>* ppc_object | |
5252 | = static_cast<Powerpc_relobj<size, big_endian>*>(dst_obj); | |
acc276d8 AM |
5253 | if (size == 64 |
5254 | && !ppc_object->is_dynamic() | |
5255 | && dst_shndx == ppc_object->opd_shndx()) | |
e81fea4d AM |
5256 | { |
5257 | if (ppc_object->opd_valid()) | |
5258 | { | |
5259 | dst_shndx = ppc_object->get_opd_ent(dst_off); | |
5260 | symtab->gc()->add_reference(src_obj, src_shndx, dst_obj, dst_shndx); | |
5261 | } | |
5262 | else | |
5263 | { | |
5264 | // If we haven't run scan_opd_relocs, we must delay | |
5265 | // processing this function descriptor reference. | |
5266 | ppc_object->add_reference(src_obj, src_shndx, dst_off); | |
5267 | } | |
5268 | } | |
5269 | } | |
5270 | ||
5271 | // Add any special sections for this symbol to the gc work list. | |
5272 | // For powerpc64, this adds the code section of a function | |
5273 | // descriptor. | |
5274 | ||
5275 | template<int size, bool big_endian> | |
5276 | void | |
5277 | Target_powerpc<size, big_endian>::do_gc_mark_symbol( | |
5278 | Symbol_table* symtab, | |
5279 | Symbol* sym) const | |
5280 | { | |
5281 | if (size == 64) | |
5282 | { | |
5283 | Powerpc_relobj<size, big_endian>* ppc_object | |
5284 | = static_cast<Powerpc_relobj<size, big_endian>*>(sym->object()); | |
5285 | bool is_ordinary; | |
5286 | unsigned int shndx = sym->shndx(&is_ordinary); | |
5287 | if (is_ordinary && shndx == ppc_object->opd_shndx()) | |
5288 | { | |
5289 | Sized_symbol<size>* gsym = symtab->get_sized_symbol<size>(sym); | |
5290 | Address dst_off = gsym->value(); | |
c6de8ed4 AM |
5291 | if (ppc_object->opd_valid()) |
5292 | { | |
5293 | unsigned int dst_indx = ppc_object->get_opd_ent(dst_off); | |
5294 | symtab->gc()->worklist().push(Section_id(ppc_object, dst_indx)); | |
5295 | } | |
5296 | else | |
5297 | ppc_object->add_gc_mark(dst_off); | |
e81fea4d AM |
5298 | } |
5299 | } | |
5300 | } | |
5301 | ||
42cacb20 DE |
5302 | // Scan relocations for a section. |
5303 | ||
5304 | template<int size, bool big_endian> | |
5305 | void | |
5306 | Target_powerpc<size, big_endian>::scan_relocs( | |
d83ce4e3 AM |
5307 | Symbol_table* symtab, |
5308 | Layout* layout, | |
5309 | Sized_relobj_file<size, big_endian>* object, | |
5310 | unsigned int data_shndx, | |
5311 | unsigned int sh_type, | |
5312 | const unsigned char* prelocs, | |
5313 | size_t reloc_count, | |
5314 | Output_section* output_section, | |
5315 | bool needs_special_offset_handling, | |
5316 | size_t local_symbol_count, | |
5317 | const unsigned char* plocal_symbols) | |
42cacb20 DE |
5318 | { |
5319 | typedef Target_powerpc<size, big_endian> Powerpc; | |
2ea97941 | 5320 | typedef typename Target_powerpc<size, big_endian>::Scan Scan; |
42cacb20 DE |
5321 | |
5322 | if (sh_type == elfcpp::SHT_REL) | |
5323 | { | |
5324 | gold_error(_("%s: unsupported REL reloc section"), | |
5325 | object->name().c_str()); | |
5326 | return; | |
5327 | } | |
5328 | ||
2ea97941 | 5329 | gold::scan_relocs<size, big_endian, Powerpc, elfcpp::SHT_RELA, Scan>( |
42cacb20 DE |
5330 | symtab, |
5331 | layout, | |
5332 | this, | |
5333 | object, | |
5334 | data_shndx, | |
5335 | prelocs, | |
5336 | reloc_count, | |
5337 | output_section, | |
5338 | needs_special_offset_handling, | |
5339 | local_symbol_count, | |
5340 | plocal_symbols); | |
5341 | } | |
5342 | ||
ec4dbad3 AM |
5343 | // Functor class for processing the global symbol table. |
5344 | // Removes symbols defined on discarded opd entries. | |
5345 | ||
5346 | template<bool big_endian> | |
5347 | class Global_symbol_visitor_opd | |
5348 | { | |
5349 | public: | |
5350 | Global_symbol_visitor_opd() | |
5351 | { } | |
5352 | ||
5353 | void | |
5354 | operator()(Sized_symbol<64>* sym) | |
5355 | { | |
5356 | if (sym->has_symtab_index() | |
5357 | || sym->source() != Symbol::FROM_OBJECT | |
5358 | || !sym->in_real_elf()) | |
5359 | return; | |
5360 | ||
5361 | Powerpc_relobj<64, big_endian>* symobj | |
5362 | = static_cast<Powerpc_relobj<64, big_endian>*>(sym->object()); | |
5363 | if (symobj->is_dynamic() | |
5364 | || symobj->opd_shndx() == 0) | |
5365 | return; | |
5366 | ||
5367 | bool is_ordinary; | |
5368 | unsigned int shndx = sym->shndx(&is_ordinary); | |
5369 | if (shndx == symobj->opd_shndx() | |
5370 | && symobj->get_opd_discard(sym->value())) | |
5371 | sym->set_symtab_index(-1U); | |
5372 | } | |
5373 | }; | |
5374 | ||
f3a0ed29 AM |
5375 | template<int size, bool big_endian> |
5376 | void | |
5377 | Target_powerpc<size, big_endian>::define_save_restore_funcs( | |
5378 | Layout* layout, | |
5379 | Symbol_table* symtab) | |
5380 | { | |
5381 | if (size == 64) | |
5382 | { | |
5383 | Output_data_save_res<64, big_endian>* savres | |
5384 | = new Output_data_save_res<64, big_endian>(symtab); | |
5385 | layout->add_output_section_data(".text", elfcpp::SHT_PROGBITS, | |
5386 | elfcpp::SHF_ALLOC | elfcpp::SHF_EXECINSTR, | |
5387 | savres, ORDER_TEXT, false); | |
5388 | } | |
5389 | } | |
5390 | ||
d8f5a274 AM |
5391 | // Sort linker created .got section first (for the header), then input |
5392 | // sections belonging to files using small model code. | |
5393 | ||
5394 | template<bool big_endian> | |
5395 | class Sort_toc_sections | |
5396 | { | |
5397 | public: | |
5398 | bool | |
5399 | operator()(const Output_section::Input_section& is1, | |
5400 | const Output_section::Input_section& is2) const | |
5401 | { | |
5402 | if (!is1.is_input_section() && is2.is_input_section()) | |
5403 | return true; | |
5404 | bool small1 | |
5405 | = (is1.is_input_section() | |
5406 | && (static_cast<const Powerpc_relobj<64, big_endian>*>(is1.relobj()) | |
5407 | ->has_small_toc_reloc())); | |
5408 | bool small2 | |
5409 | = (is2.is_input_section() | |
5410 | && (static_cast<const Powerpc_relobj<64, big_endian>*>(is2.relobj()) | |
5411 | ->has_small_toc_reloc())); | |
5412 | return small1 && !small2; | |
5413 | } | |
5414 | }; | |
5415 | ||
42cacb20 DE |
5416 | // Finalize the sections. |
5417 | ||
5418 | template<int size, bool big_endian> | |
5419 | void | |
d5b40221 DK |
5420 | Target_powerpc<size, big_endian>::do_finalize_sections( |
5421 | Layout* layout, | |
f59f41f3 | 5422 | const Input_objects*, |
ec4dbad3 | 5423 | Symbol_table* symtab) |
42cacb20 | 5424 | { |
c9824451 AM |
5425 | if (parameters->doing_static_link()) |
5426 | { | |
5427 | // At least some versions of glibc elf-init.o have a strong | |
5428 | // reference to __rela_iplt marker syms. A weak ref would be | |
5429 | // better.. | |
5430 | if (this->iplt_ != NULL) | |
5431 | { | |
5432 | Reloc_section* rel = this->iplt_->rel_plt(); | |
5433 | symtab->define_in_output_data("__rela_iplt_start", NULL, | |
5434 | Symbol_table::PREDEFINED, rel, 0, 0, | |
5435 | elfcpp::STT_NOTYPE, elfcpp::STB_GLOBAL, | |
5436 | elfcpp::STV_HIDDEN, 0, false, true); | |
5437 | symtab->define_in_output_data("__rela_iplt_end", NULL, | |
5438 | Symbol_table::PREDEFINED, rel, 0, 0, | |
5439 | elfcpp::STT_NOTYPE, elfcpp::STB_GLOBAL, | |
5440 | elfcpp::STV_HIDDEN, 0, true, true); | |
5441 | } | |
5442 | else | |
5443 | { | |
5444 | symtab->define_as_constant("__rela_iplt_start", NULL, | |
5445 | Symbol_table::PREDEFINED, 0, 0, | |
5446 | elfcpp::STT_NOTYPE, elfcpp::STB_GLOBAL, | |
5447 | elfcpp::STV_HIDDEN, 0, true, false); | |
5448 | symtab->define_as_constant("__rela_iplt_end", NULL, | |
5449 | Symbol_table::PREDEFINED, 0, 0, | |
5450 | elfcpp::STT_NOTYPE, elfcpp::STB_GLOBAL, | |
5451 | elfcpp::STV_HIDDEN, 0, true, false); | |
5452 | } | |
5453 | } | |
5454 | ||
ec4dbad3 AM |
5455 | if (size == 64) |
5456 | { | |
5457 | typedef Global_symbol_visitor_opd<big_endian> Symbol_visitor; | |
5458 | symtab->for_all_symbols<64, Symbol_visitor>(Symbol_visitor()); | |
ec661b9d AM |
5459 | |
5460 | if (!parameters->options().relocatable()) | |
5461 | { | |
5462 | this->define_save_restore_funcs(layout, symtab); | |
5463 | ||
5464 | // Annoyingly, we need to make these sections now whether or | |
5465 | // not we need them. If we delay until do_relax then we | |
5466 | // need to mess with the relaxation machinery checkpointing. | |
5467 | this->got_section(symtab, layout); | |
5468 | this->make_brlt_section(layout); | |
d8f5a274 AM |
5469 | |
5470 | if (parameters->options().toc_sort()) | |
5471 | { | |
5472 | Output_section* os = this->got_->output_section(); | |
5473 | if (os != NULL && os->input_sections().size() > 1) | |
5474 | std::stable_sort(os->input_sections().begin(), | |
5475 | os->input_sections().end(), | |
5476 | Sort_toc_sections<big_endian>()); | |
5477 | } | |
ec661b9d | 5478 | } |
ec4dbad3 AM |
5479 | } |
5480 | ||
42cacb20 | 5481 | // Fill in some more dynamic tags. |
c9269dff | 5482 | Output_data_dynamic* odyn = layout->dynamic_data(); |
c9824451 | 5483 | if (odyn != NULL) |
cf43a2fe | 5484 | { |
c9824451 AM |
5485 | const Reloc_section* rel_plt = (this->plt_ == NULL |
5486 | ? NULL | |
5487 | : this->plt_->rel_plt()); | |
5488 | layout->add_target_dynamic_tags(false, this->plt_, rel_plt, | |
5489 | this->rela_dyn_, true, size == 32); | |
5490 | ||
5491 | if (size == 32) | |
dd93cd0a | 5492 | { |
c9824451 AM |
5493 | if (this->got_ != NULL) |
5494 | { | |
5495 | this->got_->finalize_data_size(); | |
5496 | odyn->add_section_plus_offset(elfcpp::DT_PPC_GOT, | |
5497 | this->got_, this->got_->g_o_t()); | |
5498 | } | |
dd93cd0a | 5499 | } |
c9824451 | 5500 | else |
dd93cd0a | 5501 | { |
c9824451 AM |
5502 | if (this->glink_ != NULL) |
5503 | { | |
5504 | this->glink_->finalize_data_size(); | |
5505 | odyn->add_section_plus_offset(elfcpp::DT_PPC64_GLINK, | |
5506 | this->glink_, | |
ec661b9d | 5507 | (this->glink_->pltresolve_size |
c9824451 AM |
5508 | - 32)); |
5509 | } | |
dd93cd0a | 5510 | } |
c9269dff | 5511 | } |
cf43a2fe | 5512 | |
42cacb20 DE |
5513 | // Emit any relocs we saved in an attempt to avoid generating COPY |
5514 | // relocs. | |
5515 | if (this->copy_relocs_.any_saved_relocs()) | |
5516 | this->copy_relocs_.emit(this->rela_dyn_section(layout)); | |
5517 | } | |
5518 | ||
aba6bc71 AM |
5519 | // Return TRUE iff INSN is one we expect on a _LO variety toc/got |
5520 | // reloc. | |
5521 | ||
5522 | static bool | |
5523 | ok_lo_toc_insn(uint32_t insn) | |
5524 | { | |
5525 | return ((insn & (0x3f << 26)) == 14u << 26 /* addi */ | |
5526 | || (insn & (0x3f << 26)) == 32u << 26 /* lwz */ | |
5527 | || (insn & (0x3f << 26)) == 34u << 26 /* lbz */ | |
5528 | || (insn & (0x3f << 26)) == 36u << 26 /* stw */ | |
5529 | || (insn & (0x3f << 26)) == 38u << 26 /* stb */ | |
5530 | || (insn & (0x3f << 26)) == 40u << 26 /* lhz */ | |
5531 | || (insn & (0x3f << 26)) == 42u << 26 /* lha */ | |
5532 | || (insn & (0x3f << 26)) == 44u << 26 /* sth */ | |
5533 | || (insn & (0x3f << 26)) == 46u << 26 /* lmw */ | |
5534 | || (insn & (0x3f << 26)) == 47u << 26 /* stmw */ | |
5535 | || (insn & (0x3f << 26)) == 48u << 26 /* lfs */ | |
5536 | || (insn & (0x3f << 26)) == 50u << 26 /* lfd */ | |
5537 | || (insn & (0x3f << 26)) == 52u << 26 /* stfs */ | |
5538 | || (insn & (0x3f << 26)) == 54u << 26 /* stfd */ | |
5539 | || ((insn & (0x3f << 26)) == 58u << 26 /* lwa,ld,lmd */ | |
5540 | && (insn & 3) != 1) | |
5541 | || ((insn & (0x3f << 26)) == 62u << 26 /* std, stmd */ | |
5542 | && ((insn & 3) == 0 || (insn & 3) == 3)) | |
5543 | || (insn & (0x3f << 26)) == 12u << 26 /* addic */); | |
5544 | } | |
5545 | ||
3ea0a085 AM |
5546 | // Return the value to use for a branch relocation. |
5547 | ||
5548 | template<int size, bool big_endian> | |
5549 | typename elfcpp::Elf_types<size>::Elf_Addr | |
5550 | Target_powerpc<size, big_endian>::symval_for_branch( | |
5551 | Address value, | |
5552 | const Sized_symbol<size>* gsym, | |
5553 | Powerpc_relobj<size, big_endian>* object, | |
5554 | unsigned int *dest_shndx) | |
5555 | { | |
5556 | *dest_shndx = 0; | |
5557 | if (size == 32) | |
5558 | return value; | |
5559 | ||
5560 | // If the symbol is defined in an opd section, ie. is a function | |
5561 | // descriptor, use the function descriptor code entry address | |
5562 | Powerpc_relobj<size, big_endian>* symobj = object; | |
f3a0ed29 AM |
5563 | if (gsym != NULL |
5564 | && gsym->source() != Symbol::FROM_OBJECT) | |
5565 | return value; | |
3ea0a085 AM |
5566 | if (gsym != NULL) |
5567 | symobj = static_cast<Powerpc_relobj<size, big_endian>*>(gsym->object()); | |
5568 | unsigned int shndx = symobj->opd_shndx(); | |
5569 | if (shndx == 0) | |
5570 | return value; | |
5571 | Address opd_addr = symobj->get_output_section_offset(shndx); | |
5572 | gold_assert(opd_addr != invalid_address); | |
5573 | opd_addr += symobj->output_section(shndx)->address(); | |
5574 | if (value >= opd_addr && value < opd_addr + symobj->section_size(shndx)) | |
5575 | { | |
5576 | Address sec_off; | |
e81fea4d | 5577 | *dest_shndx = symobj->get_opd_ent(value - opd_addr, &sec_off); |
3ea0a085 AM |
5578 | Address sec_addr = symobj->get_output_section_offset(*dest_shndx); |
5579 | gold_assert(sec_addr != invalid_address); | |
5580 | sec_addr += symobj->output_section(*dest_shndx)->address(); | |
5581 | value = sec_addr + sec_off; | |
5582 | } | |
5583 | return value; | |
5584 | } | |
5585 | ||
42cacb20 DE |
5586 | // Perform a relocation. |
5587 | ||
5588 | template<int size, bool big_endian> | |
5589 | inline bool | |
5590 | Target_powerpc<size, big_endian>::Relocate::relocate( | |
d83ce4e3 AM |
5591 | const Relocate_info<size, big_endian>* relinfo, |
5592 | Target_powerpc* target, | |
5593 | Output_section* os, | |
5594 | size_t relnum, | |
5595 | const elfcpp::Rela<size, big_endian>& rela, | |
5596 | unsigned int r_type, | |
5597 | const Sized_symbol<size>* gsym, | |
5598 | const Symbol_value<size>* psymval, | |
5599 | unsigned char* view, | |
c9269dff AM |
5600 | Address address, |
5601 | section_size_type view_size) | |
42cacb20 | 5602 | { |
dd93cd0a AM |
5603 | bool is_tls_call = ((r_type == elfcpp::R_POWERPC_REL24 |
5604 | || r_type == elfcpp::R_PPC_PLTREL24) | |
5605 | && gsym != NULL | |
5606 | && strcmp(gsym->name(), "__tls_get_addr") == 0); | |
5607 | enum skip_tls last_tls = this->call_tls_get_addr_; | |
5608 | this->call_tls_get_addr_ = CALL_NOT_EXPECTED; | |
5609 | if (is_tls_call) | |
5610 | { | |
5611 | if (last_tls == CALL_NOT_EXPECTED) | |
5612 | gold_error_at_location(relinfo, relnum, rela.get_r_offset(), | |
5613 | _("__tls_get_addr call lacks marker reloc")); | |
5614 | else if (last_tls == CALL_SKIP) | |
5615 | return false; | |
5616 | } | |
5617 | else if (last_tls != CALL_NOT_EXPECTED) | |
5618 | gold_error_at_location(relinfo, relnum, rela.get_r_offset(), | |
5619 | _("missing expected __tls_get_addr call")); | |
5620 | ||
42cacb20 | 5621 | typedef Powerpc_relocate_functions<size, big_endian> Reloc; |
dd93cd0a | 5622 | typedef typename elfcpp::Swap<32, big_endian>::Valtype Insn; |
3ea0a085 AM |
5623 | Powerpc_relobj<size, big_endian>* const object |
5624 | = static_cast<Powerpc_relobj<size, big_endian>*>(relinfo->object); | |
dd93cd0a AM |
5625 | Address value = 0; |
5626 | bool has_plt_value = false; | |
e5d5f5ed | 5627 | unsigned int r_sym = elfcpp::elf_r_sym<size>(rela.get_r_info()); |
dd93cd0a | 5628 | if (gsym != NULL |
e5d5f5ed AM |
5629 | ? use_plt_offset<size>(gsym, Scan::get_reference_flags(r_type)) |
5630 | : object->local_has_plt_offset(r_sym)) | |
dd93cd0a | 5631 | { |
ec661b9d AM |
5632 | Stub_table<size, big_endian>* stub_table |
5633 | = object->stub_table(relinfo->data_shndx); | |
5634 | if (stub_table == NULL) | |
5635 | { | |
5636 | // This is a ref from a data section to an ifunc symbol. | |
5637 | if (target->stub_tables().size() != 0) | |
5638 | stub_table = target->stub_tables()[0]; | |
5639 | } | |
5640 | gold_assert(stub_table != NULL); | |
5641 | Address off; | |
c9824451 | 5642 | if (gsym != NULL) |
ec661b9d AM |
5643 | off = stub_table->find_plt_call_entry(object, gsym, r_type, |
5644 | rela.get_r_addend()); | |
c9824451 | 5645 | else |
ec661b9d AM |
5646 | off = stub_table->find_plt_call_entry(object, r_sym, r_type, |
5647 | rela.get_r_addend()); | |
5648 | gold_assert(off != invalid_address); | |
5649 | value = stub_table->stub_address() + off; | |
dd93cd0a AM |
5650 | has_plt_value = true; |
5651 | } | |
cf43a2fe AM |
5652 | |
5653 | if (r_type == elfcpp::R_POWERPC_GOT16 | |
5654 | || r_type == elfcpp::R_POWERPC_GOT16_LO | |
5655 | || r_type == elfcpp::R_POWERPC_GOT16_HI | |
5656 | || r_type == elfcpp::R_POWERPC_GOT16_HA | |
5657 | || r_type == elfcpp::R_PPC64_GOT16_DS | |
5658 | || r_type == elfcpp::R_PPC64_GOT16_LO_DS) | |
42cacb20 | 5659 | { |
cf43a2fe AM |
5660 | if (gsym != NULL) |
5661 | { | |
5662 | gold_assert(gsym->has_got_offset(GOT_TYPE_STANDARD)); | |
5663 | value = gsym->got_offset(GOT_TYPE_STANDARD); | |
5664 | } | |
5665 | else | |
5666 | { | |
5667 | unsigned int r_sym = elfcpp::elf_r_sym<size>(rela.get_r_info()); | |
5668 | gold_assert(object->local_has_got_offset(r_sym, GOT_TYPE_STANDARD)); | |
5669 | value = object->local_got_offset(r_sym, GOT_TYPE_STANDARD); | |
5670 | } | |
dd93cd0a | 5671 | value -= target->got_section()->got_base_offset(object); |
cf43a2fe AM |
5672 | } |
5673 | else if (r_type == elfcpp::R_PPC64_TOC) | |
5674 | { | |
c9269dff | 5675 | value = (target->got_section()->output_section()->address() |
dd93cd0a | 5676 | + object->toc_base_offset()); |
cf43a2fe AM |
5677 | } |
5678 | else if (gsym != NULL | |
5679 | && (r_type == elfcpp::R_POWERPC_REL24 | |
5680 | || r_type == elfcpp::R_PPC_PLTREL24) | |
dd93cd0a | 5681 | && has_plt_value) |
cf43a2fe | 5682 | { |
c9269dff AM |
5683 | if (size == 64) |
5684 | { | |
5685 | typedef typename elfcpp::Swap<32, big_endian>::Valtype Valtype; | |
5686 | Valtype* wv = reinterpret_cast<Valtype*>(view); | |
5687 | bool can_plt_call = false; | |
5688 | if (rela.get_r_offset() + 8 <= view_size) | |
5689 | { | |
3ea0a085 | 5690 | Valtype insn = elfcpp::Swap<32, big_endian>::readval(wv); |
c9269dff | 5691 | Valtype insn2 = elfcpp::Swap<32, big_endian>::readval(wv + 1); |
3ea0a085 AM |
5692 | if ((insn & 1) != 0 |
5693 | && (insn2 == nop | |
5694 | || insn2 == cror_15_15_15 || insn2 == cror_31_31_31)) | |
c9269dff AM |
5695 | { |
5696 | elfcpp::Swap<32, big_endian>::writeval(wv + 1, ld_2_1 + 40); | |
5697 | can_plt_call = true; | |
5698 | } | |
5699 | } | |
5700 | if (!can_plt_call) | |
3ea0a085 AM |
5701 | { |
5702 | // If we don't have a branch and link followed by a nop, | |
5703 | // we can't go via the plt because there is no place to | |
5704 | // put a toc restoring instruction. | |
5705 | // Unless we know we won't be returning. | |
5706 | if (strcmp(gsym->name(), "__libc_start_main") == 0) | |
5707 | can_plt_call = true; | |
5708 | } | |
5709 | if (!can_plt_call) | |
5710 | { | |
5711 | // This is not an error in one special case: A self | |
5712 | // call. It isn't possible to cheaply verify we have | |
5713 | // such a call so just check for a call to the same | |
5714 | // section. | |
5715 | bool ok = false; | |
c9824451 | 5716 | Address code = value; |
3ea0a085 AM |
5717 | if (gsym->source() == Symbol::FROM_OBJECT |
5718 | && gsym->object() == object) | |
5719 | { | |
5720 | Address addend = rela.get_r_addend(); | |
5721 | unsigned int dest_shndx; | |
c9824451 AM |
5722 | Address opdent = psymval->value(object, addend); |
5723 | code = target->symval_for_branch(opdent, gsym, object, | |
5724 | &dest_shndx); | |
3ea0a085 AM |
5725 | bool is_ordinary; |
5726 | if (dest_shndx == 0) | |
5727 | dest_shndx = gsym->shndx(&is_ordinary); | |
5728 | ok = dest_shndx == relinfo->data_shndx; | |
5729 | } | |
5730 | if (!ok) | |
c9824451 AM |
5731 | { |
5732 | gold_error_at_location(relinfo, relnum, rela.get_r_offset(), | |
5733 | _("call lacks nop, can't restore toc; " | |
5734 | "recompile with -fPIC")); | |
5735 | value = code; | |
5736 | } | |
3ea0a085 | 5737 | } |
c9269dff | 5738 | } |
cf43a2fe | 5739 | } |
dd93cd0a AM |
5740 | else if (r_type == elfcpp::R_POWERPC_GOT_TLSGD16 |
5741 | || r_type == elfcpp::R_POWERPC_GOT_TLSGD16_LO | |
5742 | || r_type == elfcpp::R_POWERPC_GOT_TLSGD16_HI | |
5743 | || r_type == elfcpp::R_POWERPC_GOT_TLSGD16_HA) | |
5744 | { | |
5745 | // First instruction of a global dynamic sequence, arg setup insn. | |
5746 | const bool final = gsym == NULL || gsym->final_value_is_known(); | |
5747 | const tls::Tls_optimization tls_type = target->optimize_tls_gd(final); | |
5748 | enum Got_type got_type = GOT_TYPE_STANDARD; | |
5749 | if (tls_type == tls::TLSOPT_NONE) | |
5750 | got_type = GOT_TYPE_TLSGD; | |
5751 | else if (tls_type == tls::TLSOPT_TO_IE) | |
5752 | got_type = GOT_TYPE_TPREL; | |
5753 | if (got_type != GOT_TYPE_STANDARD) | |
5754 | { | |
5755 | if (gsym != NULL) | |
5756 | { | |
5757 | gold_assert(gsym->has_got_offset(got_type)); | |
5758 | value = gsym->got_offset(got_type); | |
5759 | } | |
5760 | else | |
5761 | { | |
5762 | unsigned int r_sym = elfcpp::elf_r_sym<size>(rela.get_r_info()); | |
5763 | gold_assert(object->local_has_got_offset(r_sym, got_type)); | |
5764 | value = object->local_got_offset(r_sym, got_type); | |
5765 | } | |
5766 | value -= target->got_section()->got_base_offset(object); | |
5767 | } | |
5768 | if (tls_type == tls::TLSOPT_TO_IE) | |
5769 | { | |
5770 | if (r_type == elfcpp::R_POWERPC_GOT_TLSGD16 | |
5771 | || r_type == elfcpp::R_POWERPC_GOT_TLSGD16_LO) | |
5772 | { | |
5773 | Insn* iview = reinterpret_cast<Insn*>(view - 2 * big_endian); | |
5774 | Insn insn = elfcpp::Swap<32, big_endian>::readval(iview); | |
5775 | insn &= (1 << 26) - (1 << 16); // extract rt,ra from addi | |
5776 | if (size == 32) | |
5777 | insn |= 32 << 26; // lwz | |
5778 | else | |
5779 | insn |= 58 << 26; // ld | |
5780 | elfcpp::Swap<32, big_endian>::writeval(iview, insn); | |
5781 | } | |
5782 | r_type += (elfcpp::R_POWERPC_GOT_TPREL16 | |
5783 | - elfcpp::R_POWERPC_GOT_TLSGD16); | |
5784 | } | |
5785 | else if (tls_type == tls::TLSOPT_TO_LE) | |
5786 | { | |
5787 | if (r_type == elfcpp::R_POWERPC_GOT_TLSGD16 | |
5788 | || r_type == elfcpp::R_POWERPC_GOT_TLSGD16_LO) | |
5789 | { | |
5790 | Insn* iview = reinterpret_cast<Insn*>(view - 2 * big_endian); | |
5791 | Insn insn = addis_3_13; | |
5792 | if (size == 32) | |
5793 | insn = addis_3_2; | |
5794 | elfcpp::Swap<32, big_endian>::writeval(iview, insn); | |
5795 | r_type = elfcpp::R_POWERPC_TPREL16_HA; | |
5796 | value = psymval->value(object, rela.get_r_addend()); | |
5797 | } | |
5798 | else | |
5799 | { | |
5800 | Insn* iview = reinterpret_cast<Insn*>(view - 2 * big_endian); | |
5801 | Insn insn = nop; | |
5802 | elfcpp::Swap<32, big_endian>::writeval(iview, insn); | |
5803 | r_type = elfcpp::R_POWERPC_NONE; | |
5804 | } | |
5805 | } | |
5806 | } | |
5807 | else if (r_type == elfcpp::R_POWERPC_GOT_TLSLD16 | |
5808 | || r_type == elfcpp::R_POWERPC_GOT_TLSLD16_LO | |
5809 | || r_type == elfcpp::R_POWERPC_GOT_TLSLD16_HI | |
5810 | || r_type == elfcpp::R_POWERPC_GOT_TLSLD16_HA) | |
5811 | { | |
5812 | // First instruction of a local dynamic sequence, arg setup insn. | |
5813 | const tls::Tls_optimization tls_type = target->optimize_tls_ld(); | |
5814 | if (tls_type == tls::TLSOPT_NONE) | |
5815 | { | |
5816 | value = target->tlsld_got_offset(); | |
5817 | value -= target->got_section()->got_base_offset(object); | |
5818 | } | |
5819 | else | |
5820 | { | |
5821 | gold_assert(tls_type == tls::TLSOPT_TO_LE); | |
5822 | if (r_type == elfcpp::R_POWERPC_GOT_TLSLD16 | |
5823 | || r_type == elfcpp::R_POWERPC_GOT_TLSLD16_LO) | |
5824 | { | |
5825 | Insn* iview = reinterpret_cast<Insn*>(view - 2 * big_endian); | |
5826 | Insn insn = addis_3_13; | |
5827 | if (size == 32) | |
5828 | insn = addis_3_2; | |
5829 | elfcpp::Swap<32, big_endian>::writeval(iview, insn); | |
5830 | r_type = elfcpp::R_POWERPC_TPREL16_HA; | |
7404fe1b | 5831 | value = dtp_offset; |
dd93cd0a AM |
5832 | } |
5833 | else | |
5834 | { | |
5835 | Insn* iview = reinterpret_cast<Insn*>(view - 2 * big_endian); | |
5836 | Insn insn = nop; | |
5837 | elfcpp::Swap<32, big_endian>::writeval(iview, insn); | |
5838 | r_type = elfcpp::R_POWERPC_NONE; | |
5839 | } | |
5840 | } | |
5841 | } | |
5842 | else if (r_type == elfcpp::R_POWERPC_GOT_DTPREL16 | |
5843 | || r_type == elfcpp::R_POWERPC_GOT_DTPREL16_LO | |
5844 | || r_type == elfcpp::R_POWERPC_GOT_DTPREL16_HI | |
5845 | || r_type == elfcpp::R_POWERPC_GOT_DTPREL16_HA) | |
5846 | { | |
5847 | // Accesses relative to a local dynamic sequence address, | |
5848 | // no optimisation here. | |
5849 | if (gsym != NULL) | |
5850 | { | |
5851 | gold_assert(gsym->has_got_offset(GOT_TYPE_DTPREL)); | |
5852 | value = gsym->got_offset(GOT_TYPE_DTPREL); | |
5853 | } | |
5854 | else | |
5855 | { | |
5856 | unsigned int r_sym = elfcpp::elf_r_sym<size>(rela.get_r_info()); | |
5857 | gold_assert(object->local_has_got_offset(r_sym, GOT_TYPE_DTPREL)); | |
5858 | value = object->local_got_offset(r_sym, GOT_TYPE_DTPREL); | |
5859 | } | |
5860 | value -= target->got_section()->got_base_offset(object); | |
5861 | } | |
5862 | else if (r_type == elfcpp::R_POWERPC_GOT_TPREL16 | |
5863 | || r_type == elfcpp::R_POWERPC_GOT_TPREL16_LO | |
5864 | || r_type == elfcpp::R_POWERPC_GOT_TPREL16_HI | |
5865 | || r_type == elfcpp::R_POWERPC_GOT_TPREL16_HA) | |
5866 | { | |
5867 | // First instruction of initial exec sequence. | |
5868 | const bool final = gsym == NULL || gsym->final_value_is_known(); | |
5869 | const tls::Tls_optimization tls_type = target->optimize_tls_ie(final); | |
5870 | if (tls_type == tls::TLSOPT_NONE) | |
5871 | { | |
5872 | if (gsym != NULL) | |
5873 | { | |
5874 | gold_assert(gsym->has_got_offset(GOT_TYPE_TPREL)); | |
5875 | value = gsym->got_offset(GOT_TYPE_TPREL); | |
5876 | } | |
5877 | else | |
5878 | { | |
5879 | unsigned int r_sym = elfcpp::elf_r_sym<size>(rela.get_r_info()); | |
5880 | gold_assert(object->local_has_got_offset(r_sym, GOT_TYPE_TPREL)); | |
5881 | value = object->local_got_offset(r_sym, GOT_TYPE_TPREL); | |
5882 | } | |
5883 | value -= target->got_section()->got_base_offset(object); | |
5884 | } | |
5885 | else | |
5886 | { | |
5887 | gold_assert(tls_type == tls::TLSOPT_TO_LE); | |
5888 | if (r_type == elfcpp::R_POWERPC_GOT_TPREL16 | |
5889 | || r_type == elfcpp::R_POWERPC_GOT_TPREL16_LO) | |
5890 | { | |
5891 | Insn* iview = reinterpret_cast<Insn*>(view - 2 * big_endian); | |
5892 | Insn insn = elfcpp::Swap<32, big_endian>::readval(iview); | |
5893 | insn &= (1 << 26) - (1 << 21); // extract rt from ld | |
5894 | if (size == 32) | |
5895 | insn |= addis_0_2; | |
5896 | else | |
5897 | insn |= addis_0_13; | |
5898 | elfcpp::Swap<32, big_endian>::writeval(iview, insn); | |
5899 | r_type = elfcpp::R_POWERPC_TPREL16_HA; | |
5900 | value = psymval->value(object, rela.get_r_addend()); | |
5901 | } | |
5902 | else | |
5903 | { | |
5904 | Insn* iview = reinterpret_cast<Insn*>(view - 2 * big_endian); | |
5905 | Insn insn = nop; | |
5906 | elfcpp::Swap<32, big_endian>::writeval(iview, insn); | |
5907 | r_type = elfcpp::R_POWERPC_NONE; | |
5908 | } | |
5909 | } | |
5910 | } | |
5911 | else if ((size == 64 && r_type == elfcpp::R_PPC64_TLSGD) | |
5912 | || (size == 32 && r_type == elfcpp::R_PPC_TLSGD)) | |
5913 | { | |
5914 | // Second instruction of a global dynamic sequence, | |
5915 | // the __tls_get_addr call | |
5916 | this->call_tls_get_addr_ = CALL_EXPECTED; | |
5917 | const bool final = gsym == NULL || gsym->final_value_is_known(); | |
5918 | const tls::Tls_optimization tls_type = target->optimize_tls_gd(final); | |
5919 | if (tls_type != tls::TLSOPT_NONE) | |
5920 | { | |
5921 | if (tls_type == tls::TLSOPT_TO_IE) | |
5922 | { | |
5923 | Insn* iview = reinterpret_cast<Insn*>(view); | |
5924 | Insn insn = add_3_3_13; | |
5925 | if (size == 32) | |
5926 | insn = add_3_3_2; | |
5927 | elfcpp::Swap<32, big_endian>::writeval(iview, insn); | |
5928 | r_type = elfcpp::R_POWERPC_NONE; | |
5929 | } | |
5930 | else | |
5931 | { | |
5932 | Insn* iview = reinterpret_cast<Insn*>(view); | |
5933 | Insn insn = addi_3_3; | |
5934 | elfcpp::Swap<32, big_endian>::writeval(iview, insn); | |
5935 | r_type = elfcpp::R_POWERPC_TPREL16_LO; | |
5936 | view += 2 * big_endian; | |
5937 | value = psymval->value(object, rela.get_r_addend()); | |
5938 | } | |
5939 | this->call_tls_get_addr_ = CALL_SKIP; | |
5940 | } | |
5941 | } | |
5942 | else if ((size == 64 && r_type == elfcpp::R_PPC64_TLSLD) | |
5943 | || (size == 32 && r_type == elfcpp::R_PPC_TLSLD)) | |
5944 | { | |
5945 | // Second instruction of a local dynamic sequence, | |
5946 | // the __tls_get_addr call | |
5947 | this->call_tls_get_addr_ = CALL_EXPECTED; | |
5948 | const tls::Tls_optimization tls_type = target->optimize_tls_ld(); | |
5949 | if (tls_type == tls::TLSOPT_TO_LE) | |
5950 | { | |
5951 | Insn* iview = reinterpret_cast<Insn*>(view); | |
5952 | Insn insn = addi_3_3; | |
5953 | elfcpp::Swap<32, big_endian>::writeval(iview, insn); | |
5954 | this->call_tls_get_addr_ = CALL_SKIP; | |
5955 | r_type = elfcpp::R_POWERPC_TPREL16_LO; | |
5956 | view += 2 * big_endian; | |
7404fe1b | 5957 | value = dtp_offset; |
dd93cd0a AM |
5958 | } |
5959 | } | |
5960 | else if (r_type == elfcpp::R_POWERPC_TLS) | |
5961 | { | |
5962 | // Second instruction of an initial exec sequence | |
5963 | const bool final = gsym == NULL || gsym->final_value_is_known(); | |
5964 | const tls::Tls_optimization tls_type = target->optimize_tls_ie(final); | |
5965 | if (tls_type == tls::TLSOPT_TO_LE) | |
5966 | { | |
5967 | Insn* iview = reinterpret_cast<Insn*>(view); | |
5968 | Insn insn = elfcpp::Swap<32, big_endian>::readval(iview); | |
5969 | unsigned int reg = size == 32 ? 2 : 13; | |
5970 | insn = at_tls_transform(insn, reg); | |
5971 | gold_assert(insn != 0); | |
5972 | elfcpp::Swap<32, big_endian>::writeval(iview, insn); | |
5973 | r_type = elfcpp::R_POWERPC_TPREL16_LO; | |
5974 | view += 2 * big_endian; | |
5975 | value = psymval->value(object, rela.get_r_addend()); | |
5976 | } | |
5977 | } | |
c9824451 | 5978 | else if (!has_plt_value) |
cf43a2fe | 5979 | { |
dd93cd0a | 5980 | Address addend = 0; |
3ea0a085 | 5981 | unsigned int dest_shndx; |
cf43a2fe AM |
5982 | if (r_type != elfcpp::R_PPC_PLTREL24) |
5983 | addend = rela.get_r_addend(); | |
c9824451 | 5984 | value = psymval->value(object, addend); |
dd93cd0a | 5985 | if (size == 64 && is_branch_reloc(r_type)) |
3ea0a085 | 5986 | value = target->symval_for_branch(value, gsym, object, &dest_shndx); |
ec661b9d AM |
5987 | unsigned int max_branch_offset = 0; |
5988 | if (r_type == elfcpp::R_POWERPC_REL24 | |
5989 | || r_type == elfcpp::R_PPC_PLTREL24 | |
5990 | || r_type == elfcpp::R_PPC_LOCAL24PC) | |
5991 | max_branch_offset = 1 << 25; | |
5992 | else if (r_type == elfcpp::R_POWERPC_REL14 | |
5993 | || r_type == elfcpp::R_POWERPC_REL14_BRTAKEN | |
5994 | || r_type == elfcpp::R_POWERPC_REL14_BRNTAKEN) | |
5995 | max_branch_offset = 1 << 15; | |
5996 | if (max_branch_offset != 0 | |
5997 | && value - address + max_branch_offset >= 2 * max_branch_offset) | |
5998 | { | |
5999 | Stub_table<size, big_endian>* stub_table | |
6000 | = object->stub_table(relinfo->data_shndx); | |
6001 | gold_assert(stub_table != NULL); | |
6002 | Address off = stub_table->find_long_branch_entry(object, value); | |
6003 | if (off != invalid_address) | |
6004 | value = stub_table->stub_address() + stub_table->plt_size() + off; | |
6005 | } | |
42cacb20 DE |
6006 | } |
6007 | ||
42cacb20 DE |
6008 | switch (r_type) |
6009 | { | |
dd93cd0a AM |
6010 | case elfcpp::R_PPC64_REL64: |
6011 | case elfcpp::R_POWERPC_REL32: | |
6012 | case elfcpp::R_POWERPC_REL24: | |
6013 | case elfcpp::R_PPC_PLTREL24: | |
6014 | case elfcpp::R_PPC_LOCAL24PC: | |
6015 | case elfcpp::R_POWERPC_REL16: | |
6016 | case elfcpp::R_POWERPC_REL16_LO: | |
6017 | case elfcpp::R_POWERPC_REL16_HI: | |
6018 | case elfcpp::R_POWERPC_REL16_HA: | |
6019 | case elfcpp::R_POWERPC_REL14: | |
6020 | case elfcpp::R_POWERPC_REL14_BRTAKEN: | |
6021 | case elfcpp::R_POWERPC_REL14_BRNTAKEN: | |
6022 | value -= address; | |
6023 | break; | |
6024 | ||
42cacb20 DE |
6025 | case elfcpp::R_PPC64_TOC16: |
6026 | case elfcpp::R_PPC64_TOC16_LO: | |
6027 | case elfcpp::R_PPC64_TOC16_HI: | |
6028 | case elfcpp::R_PPC64_TOC16_HA: | |
6029 | case elfcpp::R_PPC64_TOC16_DS: | |
6030 | case elfcpp::R_PPC64_TOC16_LO_DS: | |
cf43a2fe | 6031 | // Subtract the TOC base address. |
c9269dff | 6032 | value -= (target->got_section()->output_section()->address() |
dd93cd0a | 6033 | + object->toc_base_offset()); |
42cacb20 DE |
6034 | break; |
6035 | ||
cf43a2fe AM |
6036 | case elfcpp::R_POWERPC_SECTOFF: |
6037 | case elfcpp::R_POWERPC_SECTOFF_LO: | |
6038 | case elfcpp::R_POWERPC_SECTOFF_HI: | |
6039 | case elfcpp::R_POWERPC_SECTOFF_HA: | |
6040 | case elfcpp::R_PPC64_SECTOFF_DS: | |
6041 | case elfcpp::R_PPC64_SECTOFF_LO_DS: | |
6042 | if (os != NULL) | |
6043 | value -= os->address(); | |
42cacb20 DE |
6044 | break; |
6045 | ||
dd93cd0a AM |
6046 | case elfcpp::R_PPC64_TPREL16_DS: |
6047 | case elfcpp::R_PPC64_TPREL16_LO_DS: | |
6048 | if (size != 64) | |
6049 | // R_PPC_TLSGD and R_PPC_TLSLD | |
6050 | break; | |
6051 | case elfcpp::R_POWERPC_TPREL16: | |
6052 | case elfcpp::R_POWERPC_TPREL16_LO: | |
6053 | case elfcpp::R_POWERPC_TPREL16_HI: | |
6054 | case elfcpp::R_POWERPC_TPREL16_HA: | |
6055 | case elfcpp::R_POWERPC_TPREL: | |
6056 | case elfcpp::R_PPC64_TPREL16_HIGHER: | |
6057 | case elfcpp::R_PPC64_TPREL16_HIGHERA: | |
6058 | case elfcpp::R_PPC64_TPREL16_HIGHEST: | |
6059 | case elfcpp::R_PPC64_TPREL16_HIGHESTA: | |
6060 | // tls symbol values are relative to tls_segment()->vaddr() | |
6061 | value -= tp_offset; | |
6062 | break; | |
6063 | ||
6064 | case elfcpp::R_PPC64_DTPREL16_DS: | |
6065 | case elfcpp::R_PPC64_DTPREL16_LO_DS: | |
6066 | case elfcpp::R_PPC64_DTPREL16_HIGHER: | |
6067 | case elfcpp::R_PPC64_DTPREL16_HIGHERA: | |
6068 | case elfcpp::R_PPC64_DTPREL16_HIGHEST: | |
6069 | case elfcpp::R_PPC64_DTPREL16_HIGHESTA: | |
6070 | if (size != 64) | |
6071 | // R_PPC_EMB_NADDR32, R_PPC_EMB_NADDR16, R_PPC_EMB_NADDR16_LO | |
6072 | // R_PPC_EMB_NADDR16_HI, R_PPC_EMB_NADDR16_HA, R_PPC_EMB_SDAI16 | |
6073 | break; | |
6074 | case elfcpp::R_POWERPC_DTPREL16: | |
6075 | case elfcpp::R_POWERPC_DTPREL16_LO: | |
6076 | case elfcpp::R_POWERPC_DTPREL16_HI: | |
6077 | case elfcpp::R_POWERPC_DTPREL16_HA: | |
6078 | case elfcpp::R_POWERPC_DTPREL: | |
6079 | // tls symbol values are relative to tls_segment()->vaddr() | |
6080 | value -= dtp_offset; | |
6081 | break; | |
6082 | ||
42cacb20 DE |
6083 | default: |
6084 | break; | |
6085 | } | |
6086 | ||
dd93cd0a | 6087 | Insn branch_bit = 0; |
42cacb20 DE |
6088 | switch (r_type) |
6089 | { | |
dd93cd0a AM |
6090 | case elfcpp::R_POWERPC_ADDR14_BRTAKEN: |
6091 | case elfcpp::R_POWERPC_REL14_BRTAKEN: | |
6092 | branch_bit = 1 << 21; | |
6093 | case elfcpp::R_POWERPC_ADDR14_BRNTAKEN: | |
6094 | case elfcpp::R_POWERPC_REL14_BRNTAKEN: | |
6095 | { | |
6096 | Insn* iview = reinterpret_cast<Insn*>(view); | |
6097 | Insn insn = elfcpp::Swap<32, big_endian>::readval(iview); | |
6098 | insn &= ~(1 << 21); | |
6099 | insn |= branch_bit; | |
6100 | if (this->is_isa_v2) | |
6101 | { | |
6102 | // Set 'a' bit. This is 0b00010 in BO field for branch | |
6103 | // on CR(BI) insns (BO == 001at or 011at), and 0b01000 | |
6104 | // for branch on CTR insns (BO == 1a00t or 1a01t). | |
6105 | if ((insn & (0x14 << 21)) == (0x04 << 21)) | |
6106 | insn |= 0x02 << 21; | |
6107 | else if ((insn & (0x14 << 21)) == (0x10 << 21)) | |
6108 | insn |= 0x08 << 21; | |
6109 | else | |
6110 | break; | |
6111 | } | |
6112 | else | |
6113 | { | |
6114 | // Invert 'y' bit if not the default. | |
6115 | if (static_cast<Signed_address>(value) < 0) | |
6116 | insn ^= 1 << 21; | |
6117 | } | |
6118 | elfcpp::Swap<32, big_endian>::writeval(iview, insn); | |
6119 | } | |
6120 | break; | |
6121 | ||
6122 | default: | |
6123 | break; | |
6124 | } | |
6125 | ||
aba6bc71 AM |
6126 | if (size == 64) |
6127 | { | |
6128 | // Multi-instruction sequences that access the TOC can be | |
6129 | // optimized, eg. addis ra,r2,0; addi rb,ra,x; | |
6130 | // to nop; addi rb,r2,x; | |
6131 | switch (r_type) | |
6132 | { | |
6133 | default: | |
6134 | break; | |
6135 | ||
6136 | case elfcpp::R_POWERPC_GOT_TLSLD16_HA: | |
6137 | case elfcpp::R_POWERPC_GOT_TLSGD16_HA: | |
6138 | case elfcpp::R_POWERPC_GOT_TPREL16_HA: | |
6139 | case elfcpp::R_POWERPC_GOT_DTPREL16_HA: | |
6140 | case elfcpp::R_POWERPC_GOT16_HA: | |
6141 | case elfcpp::R_PPC64_TOC16_HA: | |
d8f5a274 | 6142 | if (parameters->options().toc_optimize()) |
aba6bc71 AM |
6143 | { |
6144 | Insn* iview = reinterpret_cast<Insn*>(view - 2 * big_endian); | |
6145 | Insn insn = elfcpp::Swap<32, big_endian>::readval(iview); | |
6146 | if ((insn & ((0x3f << 26) | 0x1f << 16)) | |
6147 | != ((15u << 26) | (2 << 16)) /* addis rt,2,imm */) | |
6148 | gold_error_at_location(relinfo, relnum, rela.get_r_offset(), | |
6149 | _("toc optimization is not supported " | |
6150 | "for %#08x instruction"), insn); | |
6151 | else if (value + 0x8000 < 0x10000) | |
6152 | { | |
6153 | elfcpp::Swap<32, big_endian>::writeval(iview, nop); | |
6154 | return true; | |
6155 | } | |
6156 | } | |
6157 | break; | |
6158 | ||
6159 | case elfcpp::R_POWERPC_GOT_TLSLD16_LO: | |
6160 | case elfcpp::R_POWERPC_GOT_TLSGD16_LO: | |
6161 | case elfcpp::R_POWERPC_GOT_TPREL16_LO: | |
6162 | case elfcpp::R_POWERPC_GOT_DTPREL16_LO: | |
6163 | case elfcpp::R_POWERPC_GOT16_LO: | |
6164 | case elfcpp::R_PPC64_GOT16_LO_DS: | |
6165 | case elfcpp::R_PPC64_TOC16_LO: | |
6166 | case elfcpp::R_PPC64_TOC16_LO_DS: | |
d8f5a274 | 6167 | if (parameters->options().toc_optimize()) |
aba6bc71 AM |
6168 | { |
6169 | Insn* iview = reinterpret_cast<Insn*>(view - 2 * big_endian); | |
6170 | Insn insn = elfcpp::Swap<32, big_endian>::readval(iview); | |
6171 | if (!ok_lo_toc_insn(insn)) | |
6172 | gold_error_at_location(relinfo, relnum, rela.get_r_offset(), | |
6173 | _("toc optimization is not supported " | |
6174 | "for %#08x instruction"), insn); | |
6175 | else if (value + 0x8000 < 0x10000) | |
6176 | { | |
6177 | if ((insn & (0x3f << 26)) == 12u << 26 /* addic */) | |
6178 | { | |
6179 | // Transform addic to addi when we change reg. | |
6180 | insn &= ~((0x3f << 26) | (0x1f << 16)); | |
6181 | insn |= (14u << 26) | (2 << 16); | |
6182 | } | |
6183 | else | |
6184 | { | |
6185 | insn &= ~(0x1f << 16); | |
6186 | insn |= 2 << 16; | |
6187 | } | |
6188 | elfcpp::Swap<32, big_endian>::writeval(iview, insn); | |
6189 | } | |
6190 | } | |
6191 | break; | |
6192 | } | |
6193 | } | |
6194 | ||
f4baf0d4 | 6195 | typename Reloc::Overflow_check overflow = Reloc::CHECK_NONE; |
dd93cd0a AM |
6196 | switch (r_type) |
6197 | { | |
6198 | case elfcpp::R_POWERPC_ADDR32: | |
6199 | case elfcpp::R_POWERPC_UADDR32: | |
6200 | if (size == 64) | |
f4baf0d4 | 6201 | overflow = Reloc::CHECK_BITFIELD; |
42cacb20 DE |
6202 | break; |
6203 | ||
6204 | case elfcpp::R_POWERPC_REL32: | |
dd93cd0a | 6205 | if (size == 64) |
f4baf0d4 | 6206 | overflow = Reloc::CHECK_SIGNED; |
dd93cd0a AM |
6207 | break; |
6208 | ||
6209 | case elfcpp::R_POWERPC_ADDR24: | |
6210 | case elfcpp::R_POWERPC_ADDR16: | |
6211 | case elfcpp::R_POWERPC_UADDR16: | |
6212 | case elfcpp::R_PPC64_ADDR16_DS: | |
6213 | case elfcpp::R_POWERPC_ADDR14: | |
6214 | case elfcpp::R_POWERPC_ADDR14_BRTAKEN: | |
6215 | case elfcpp::R_POWERPC_ADDR14_BRNTAKEN: | |
f4baf0d4 | 6216 | overflow = Reloc::CHECK_BITFIELD; |
42cacb20 DE |
6217 | break; |
6218 | ||
6219 | case elfcpp::R_POWERPC_REL24: | |
42cacb20 | 6220 | case elfcpp::R_PPC_PLTREL24: |
cf43a2fe | 6221 | case elfcpp::R_PPC_LOCAL24PC: |
dd93cd0a AM |
6222 | case elfcpp::R_POWERPC_REL16: |
6223 | case elfcpp::R_PPC64_TOC16: | |
6224 | case elfcpp::R_POWERPC_GOT16: | |
6225 | case elfcpp::R_POWERPC_SECTOFF: | |
6226 | case elfcpp::R_POWERPC_TPREL16: | |
6227 | case elfcpp::R_POWERPC_DTPREL16: | |
6228 | case elfcpp::R_PPC64_TPREL16_DS: | |
6229 | case elfcpp::R_PPC64_DTPREL16_DS: | |
6230 | case elfcpp::R_PPC64_TOC16_DS: | |
6231 | case elfcpp::R_PPC64_GOT16_DS: | |
6232 | case elfcpp::R_PPC64_SECTOFF_DS: | |
6233 | case elfcpp::R_POWERPC_REL14: | |
6234 | case elfcpp::R_POWERPC_REL14_BRTAKEN: | |
6235 | case elfcpp::R_POWERPC_REL14_BRNTAKEN: | |
6236 | case elfcpp::R_POWERPC_GOT_TLSGD16: | |
6237 | case elfcpp::R_POWERPC_GOT_TLSLD16: | |
6238 | case elfcpp::R_POWERPC_GOT_TPREL16: | |
6239 | case elfcpp::R_POWERPC_GOT_DTPREL16: | |
f4baf0d4 | 6240 | overflow = Reloc::CHECK_SIGNED; |
42cacb20 | 6241 | break; |
dd93cd0a | 6242 | } |
42cacb20 | 6243 | |
3ea0a085 | 6244 | typename Powerpc_relocate_functions<size, big_endian>::Status status |
f4baf0d4 | 6245 | = Powerpc_relocate_functions<size, big_endian>::STATUS_OK; |
dd93cd0a AM |
6246 | switch (r_type) |
6247 | { | |
6248 | case elfcpp::R_POWERPC_NONE: | |
6249 | case elfcpp::R_POWERPC_TLS: | |
6250 | case elfcpp::R_POWERPC_GNU_VTINHERIT: | |
6251 | case elfcpp::R_POWERPC_GNU_VTENTRY: | |
6252 | case elfcpp::R_PPC_EMB_MRKREF: | |
42cacb20 DE |
6253 | break; |
6254 | ||
6255 | case elfcpp::R_PPC64_ADDR64: | |
dd93cd0a | 6256 | case elfcpp::R_PPC64_REL64: |
cf43a2fe | 6257 | case elfcpp::R_PPC64_TOC: |
dd93cd0a AM |
6258 | Reloc::addr64(view, value); |
6259 | break; | |
6260 | ||
6261 | case elfcpp::R_POWERPC_TPREL: | |
6262 | case elfcpp::R_POWERPC_DTPREL: | |
6263 | if (size == 64) | |
6264 | Reloc::addr64(view, value); | |
6265 | else | |
3ea0a085 | 6266 | status = Reloc::addr32(view, value, overflow); |
dd93cd0a AM |
6267 | break; |
6268 | ||
6269 | case elfcpp::R_PPC64_UADDR64: | |
6270 | Reloc::addr64_u(view, value); | |
42cacb20 DE |
6271 | break; |
6272 | ||
6273 | case elfcpp::R_POWERPC_ADDR32: | |
3ea0a085 | 6274 | status = Reloc::addr32(view, value, overflow); |
dd93cd0a AM |
6275 | break; |
6276 | ||
acc276d8 | 6277 | case elfcpp::R_POWERPC_REL32: |
dd93cd0a | 6278 | case elfcpp::R_POWERPC_UADDR32: |
3ea0a085 | 6279 | status = Reloc::addr32_u(view, value, overflow); |
dd93cd0a AM |
6280 | break; |
6281 | ||
6282 | case elfcpp::R_POWERPC_ADDR24: | |
6283 | case elfcpp::R_POWERPC_REL24: | |
6284 | case elfcpp::R_PPC_PLTREL24: | |
6285 | case elfcpp::R_PPC_LOCAL24PC: | |
3ea0a085 | 6286 | status = Reloc::addr24(view, value, overflow); |
42cacb20 DE |
6287 | break; |
6288 | ||
dd93cd0a AM |
6289 | case elfcpp::R_POWERPC_GOT_DTPREL16: |
6290 | case elfcpp::R_POWERPC_GOT_DTPREL16_LO: | |
6291 | if (size == 64) | |
6292 | { | |
3ea0a085 | 6293 | status = Reloc::addr16_ds(view, value, overflow); |
dd93cd0a AM |
6294 | break; |
6295 | } | |
cf43a2fe | 6296 | case elfcpp::R_POWERPC_ADDR16: |
dd93cd0a | 6297 | case elfcpp::R_POWERPC_REL16: |
cf43a2fe | 6298 | case elfcpp::R_PPC64_TOC16: |
42cacb20 | 6299 | case elfcpp::R_POWERPC_GOT16: |
cf43a2fe | 6300 | case elfcpp::R_POWERPC_SECTOFF: |
dd93cd0a AM |
6301 | case elfcpp::R_POWERPC_TPREL16: |
6302 | case elfcpp::R_POWERPC_DTPREL16: | |
6303 | case elfcpp::R_POWERPC_GOT_TLSGD16: | |
6304 | case elfcpp::R_POWERPC_GOT_TLSLD16: | |
6305 | case elfcpp::R_POWERPC_GOT_TPREL16: | |
cf43a2fe | 6306 | case elfcpp::R_POWERPC_ADDR16_LO: |
dd93cd0a | 6307 | case elfcpp::R_POWERPC_REL16_LO: |
cf43a2fe | 6308 | case elfcpp::R_PPC64_TOC16_LO: |
42cacb20 | 6309 | case elfcpp::R_POWERPC_GOT16_LO: |
cf43a2fe | 6310 | case elfcpp::R_POWERPC_SECTOFF_LO: |
dd93cd0a AM |
6311 | case elfcpp::R_POWERPC_TPREL16_LO: |
6312 | case elfcpp::R_POWERPC_DTPREL16_LO: | |
6313 | case elfcpp::R_POWERPC_GOT_TLSGD16_LO: | |
6314 | case elfcpp::R_POWERPC_GOT_TLSLD16_LO: | |
6315 | case elfcpp::R_POWERPC_GOT_TPREL16_LO: | |
3ea0a085 | 6316 | status = Reloc::addr16(view, value, overflow); |
dd93cd0a AM |
6317 | break; |
6318 | ||
6319 | case elfcpp::R_POWERPC_UADDR16: | |
3ea0a085 | 6320 | status = Reloc::addr16_u(view, value, overflow); |
42cacb20 DE |
6321 | break; |
6322 | ||
cf43a2fe | 6323 | case elfcpp::R_POWERPC_ADDR16_HI: |
dd93cd0a | 6324 | case elfcpp::R_POWERPC_REL16_HI: |
cf43a2fe | 6325 | case elfcpp::R_PPC64_TOC16_HI: |
42cacb20 | 6326 | case elfcpp::R_POWERPC_GOT16_HI: |
cf43a2fe | 6327 | case elfcpp::R_POWERPC_SECTOFF_HI: |
dd93cd0a AM |
6328 | case elfcpp::R_POWERPC_TPREL16_HI: |
6329 | case elfcpp::R_POWERPC_DTPREL16_HI: | |
6330 | case elfcpp::R_POWERPC_GOT_TLSGD16_HI: | |
6331 | case elfcpp::R_POWERPC_GOT_TLSLD16_HI: | |
6332 | case elfcpp::R_POWERPC_GOT_TPREL16_HI: | |
6333 | case elfcpp::R_POWERPC_GOT_DTPREL16_HI: | |
6334 | Reloc::addr16_hi(view, value); | |
42cacb20 DE |
6335 | break; |
6336 | ||
cf43a2fe | 6337 | case elfcpp::R_POWERPC_ADDR16_HA: |
dd93cd0a | 6338 | case elfcpp::R_POWERPC_REL16_HA: |
cf43a2fe | 6339 | case elfcpp::R_PPC64_TOC16_HA: |
42cacb20 | 6340 | case elfcpp::R_POWERPC_GOT16_HA: |
cf43a2fe | 6341 | case elfcpp::R_POWERPC_SECTOFF_HA: |
dd93cd0a AM |
6342 | case elfcpp::R_POWERPC_TPREL16_HA: |
6343 | case elfcpp::R_POWERPC_DTPREL16_HA: | |
6344 | case elfcpp::R_POWERPC_GOT_TLSGD16_HA: | |
6345 | case elfcpp::R_POWERPC_GOT_TLSLD16_HA: | |
6346 | case elfcpp::R_POWERPC_GOT_TPREL16_HA: | |
6347 | case elfcpp::R_POWERPC_GOT_DTPREL16_HA: | |
6348 | Reloc::addr16_ha(view, value); | |
42cacb20 DE |
6349 | break; |
6350 | ||
dd93cd0a AM |
6351 | case elfcpp::R_PPC64_DTPREL16_HIGHER: |
6352 | if (size == 32) | |
6353 | // R_PPC_EMB_NADDR16_LO | |
6354 | goto unsupp; | |
6355 | case elfcpp::R_PPC64_ADDR16_HIGHER: | |
6356 | case elfcpp::R_PPC64_TPREL16_HIGHER: | |
6357 | Reloc::addr16_hi2(view, value); | |
42cacb20 DE |
6358 | break; |
6359 | ||
dd93cd0a AM |
6360 | case elfcpp::R_PPC64_DTPREL16_HIGHERA: |
6361 | if (size == 32) | |
6362 | // R_PPC_EMB_NADDR16_HI | |
6363 | goto unsupp; | |
6364 | case elfcpp::R_PPC64_ADDR16_HIGHERA: | |
6365 | case elfcpp::R_PPC64_TPREL16_HIGHERA: | |
6366 | Reloc::addr16_ha2(view, value); | |
42cacb20 DE |
6367 | break; |
6368 | ||
dd93cd0a AM |
6369 | case elfcpp::R_PPC64_DTPREL16_HIGHEST: |
6370 | if (size == 32) | |
6371 | // R_PPC_EMB_NADDR16_HA | |
6372 | goto unsupp; | |
6373 | case elfcpp::R_PPC64_ADDR16_HIGHEST: | |
6374 | case elfcpp::R_PPC64_TPREL16_HIGHEST: | |
6375 | Reloc::addr16_hi3(view, value); | |
42cacb20 DE |
6376 | break; |
6377 | ||
dd93cd0a AM |
6378 | case elfcpp::R_PPC64_DTPREL16_HIGHESTA: |
6379 | if (size == 32) | |
6380 | // R_PPC_EMB_SDAI16 | |
6381 | goto unsupp; | |
6382 | case elfcpp::R_PPC64_ADDR16_HIGHESTA: | |
6383 | case elfcpp::R_PPC64_TPREL16_HIGHESTA: | |
6384 | Reloc::addr16_ha3(view, value); | |
6385 | break; | |
6386 | ||
6387 | case elfcpp::R_PPC64_DTPREL16_DS: | |
6388 | case elfcpp::R_PPC64_DTPREL16_LO_DS: | |
6389 | if (size == 32) | |
6390 | // R_PPC_EMB_NADDR32, R_PPC_EMB_NADDR16 | |
6391 | goto unsupp; | |
6392 | case elfcpp::R_PPC64_TPREL16_DS: | |
6393 | case elfcpp::R_PPC64_TPREL16_LO_DS: | |
6394 | if (size == 32) | |
6395 | // R_PPC_TLSGD, R_PPC_TLSLD | |
6396 | break; | |
cf43a2fe AM |
6397 | case elfcpp::R_PPC64_ADDR16_DS: |
6398 | case elfcpp::R_PPC64_ADDR16_LO_DS: | |
42cacb20 DE |
6399 | case elfcpp::R_PPC64_TOC16_DS: |
6400 | case elfcpp::R_PPC64_TOC16_LO_DS: | |
cf43a2fe AM |
6401 | case elfcpp::R_PPC64_GOT16_DS: |
6402 | case elfcpp::R_PPC64_GOT16_LO_DS: | |
6403 | case elfcpp::R_PPC64_SECTOFF_DS: | |
6404 | case elfcpp::R_PPC64_SECTOFF_LO_DS: | |
3ea0a085 | 6405 | status = Reloc::addr16_ds(view, value, overflow); |
dd93cd0a AM |
6406 | break; |
6407 | ||
6408 | case elfcpp::R_POWERPC_ADDR14: | |
6409 | case elfcpp::R_POWERPC_ADDR14_BRTAKEN: | |
6410 | case elfcpp::R_POWERPC_ADDR14_BRNTAKEN: | |
6411 | case elfcpp::R_POWERPC_REL14: | |
6412 | case elfcpp::R_POWERPC_REL14_BRTAKEN: | |
6413 | case elfcpp::R_POWERPC_REL14_BRNTAKEN: | |
3ea0a085 | 6414 | status = Reloc::addr14(view, value, overflow); |
42cacb20 DE |
6415 | break; |
6416 | ||
6417 | case elfcpp::R_POWERPC_COPY: | |
6418 | case elfcpp::R_POWERPC_GLOB_DAT: | |
6419 | case elfcpp::R_POWERPC_JMP_SLOT: | |
6420 | case elfcpp::R_POWERPC_RELATIVE: | |
42cacb20 | 6421 | case elfcpp::R_POWERPC_DTPMOD: |
dd93cd0a AM |
6422 | case elfcpp::R_PPC64_JMP_IREL: |
6423 | case elfcpp::R_POWERPC_IRELATIVE: | |
42cacb20 DE |
6424 | gold_error_at_location(relinfo, relnum, rela.get_r_offset(), |
6425 | _("unexpected reloc %u in object file"), | |
6426 | r_type); | |
6427 | break; | |
6428 | ||
dd93cd0a AM |
6429 | case elfcpp::R_PPC_EMB_SDA21: |
6430 | if (size == 32) | |
6431 | goto unsupp; | |
6432 | else | |
6433 | { | |
6434 | // R_PPC64_TOCSAVE. For the time being this can be ignored. | |
6435 | } | |
6436 | break; | |
6437 | ||
6438 | case elfcpp::R_PPC_EMB_SDA2I16: | |
6439 | case elfcpp::R_PPC_EMB_SDA2REL: | |
6440 | if (size == 32) | |
6441 | goto unsupp; | |
6442 | // R_PPC64_TLSGD, R_PPC64_TLSLD | |
6ce78956 AM |
6443 | break; |
6444 | ||
dd93cd0a AM |
6445 | case elfcpp::R_POWERPC_PLT32: |
6446 | case elfcpp::R_POWERPC_PLTREL32: | |
6447 | case elfcpp::R_POWERPC_PLT16_LO: | |
6448 | case elfcpp::R_POWERPC_PLT16_HI: | |
6449 | case elfcpp::R_POWERPC_PLT16_HA: | |
6450 | case elfcpp::R_PPC_SDAREL16: | |
6451 | case elfcpp::R_POWERPC_ADDR30: | |
6452 | case elfcpp::R_PPC64_PLT64: | |
6453 | case elfcpp::R_PPC64_PLTREL64: | |
6454 | case elfcpp::R_PPC64_PLTGOT16: | |
6455 | case elfcpp::R_PPC64_PLTGOT16_LO: | |
6456 | case elfcpp::R_PPC64_PLTGOT16_HI: | |
6457 | case elfcpp::R_PPC64_PLTGOT16_HA: | |
6458 | case elfcpp::R_PPC64_PLT16_LO_DS: | |
6459 | case elfcpp::R_PPC64_PLTGOT16_DS: | |
6460 | case elfcpp::R_PPC64_PLTGOT16_LO_DS: | |
6461 | case elfcpp::R_PPC_EMB_RELSEC16: | |
6462 | case elfcpp::R_PPC_EMB_RELST_LO: | |
6463 | case elfcpp::R_PPC_EMB_RELST_HI: | |
6464 | case elfcpp::R_PPC_EMB_RELST_HA: | |
6465 | case elfcpp::R_PPC_EMB_BIT_FLD: | |
6466 | case elfcpp::R_PPC_EMB_RELSDA: | |
6467 | case elfcpp::R_PPC_TOC16: | |
42cacb20 | 6468 | default: |
dd93cd0a | 6469 | unsupp: |
42cacb20 DE |
6470 | gold_error_at_location(relinfo, relnum, rela.get_r_offset(), |
6471 | _("unsupported reloc %u"), | |
6472 | r_type); | |
6473 | break; | |
6474 | } | |
f4baf0d4 | 6475 | if (status != Powerpc_relocate_functions<size, big_endian>::STATUS_OK) |
3ea0a085 AM |
6476 | gold_error_at_location(relinfo, relnum, rela.get_r_offset(), |
6477 | _("relocation overflow")); | |
42cacb20 DE |
6478 | |
6479 | return true; | |
6480 | } | |
6481 | ||
42cacb20 DE |
6482 | // Relocate section data. |
6483 | ||
6484 | template<int size, bool big_endian> | |
6485 | void | |
6486 | Target_powerpc<size, big_endian>::relocate_section( | |
d83ce4e3 AM |
6487 | const Relocate_info<size, big_endian>* relinfo, |
6488 | unsigned int sh_type, | |
6489 | const unsigned char* prelocs, | |
6490 | size_t reloc_count, | |
6491 | Output_section* output_section, | |
6492 | bool needs_special_offset_handling, | |
6493 | unsigned char* view, | |
c9269dff | 6494 | Address address, |
d83ce4e3 AM |
6495 | section_size_type view_size, |
6496 | const Reloc_symbol_changes* reloc_symbol_changes) | |
42cacb20 DE |
6497 | { |
6498 | typedef Target_powerpc<size, big_endian> Powerpc; | |
6499 | typedef typename Target_powerpc<size, big_endian>::Relocate Powerpc_relocate; | |
168a4726 AM |
6500 | typedef typename Target_powerpc<size, big_endian>::Relocate_comdat_behavior |
6501 | Powerpc_comdat_behavior; | |
42cacb20 DE |
6502 | |
6503 | gold_assert(sh_type == elfcpp::SHT_RELA); | |
6504 | ||
6505 | gold::relocate_section<size, big_endian, Powerpc, elfcpp::SHT_RELA, | |
168a4726 | 6506 | Powerpc_relocate, Powerpc_comdat_behavior>( |
42cacb20 DE |
6507 | relinfo, |
6508 | this, | |
6509 | prelocs, | |
6510 | reloc_count, | |
6511 | output_section, | |
6512 | needs_special_offset_handling, | |
6513 | view, | |
6514 | address, | |
364c7fa5 ILT |
6515 | view_size, |
6516 | reloc_symbol_changes); | |
42cacb20 DE |
6517 | } |
6518 | ||
cf43a2fe | 6519 | class Powerpc_scan_relocatable_reloc |
42cacb20 | 6520 | { |
cf43a2fe AM |
6521 | public: |
6522 | // Return the strategy to use for a local symbol which is not a | |
6523 | // section symbol, given the relocation type. | |
6524 | inline Relocatable_relocs::Reloc_strategy | |
6525 | local_non_section_strategy(unsigned int r_type, Relobj*, unsigned int r_sym) | |
6526 | { | |
6527 | if (r_type == 0 && r_sym == 0) | |
6528 | return Relocatable_relocs::RELOC_DISCARD; | |
6529 | return Relocatable_relocs::RELOC_COPY; | |
6530 | } | |
6531 | ||
6532 | // Return the strategy to use for a local symbol which is a section | |
6533 | // symbol, given the relocation type. | |
6534 | inline Relocatable_relocs::Reloc_strategy | |
6535 | local_section_strategy(unsigned int, Relobj*) | |
6536 | { | |
6537 | return Relocatable_relocs::RELOC_ADJUST_FOR_SECTION_RELA; | |
6538 | } | |
6539 | ||
6540 | // Return the strategy to use for a global symbol, given the | |
6541 | // relocation type, the object, and the symbol index. | |
6542 | inline Relocatable_relocs::Reloc_strategy | |
6543 | global_strategy(unsigned int r_type, Relobj*, unsigned int) | |
6544 | { | |
6545 | if (r_type == elfcpp::R_PPC_PLTREL24) | |
6546 | return Relocatable_relocs::RELOC_SPECIAL; | |
6547 | return Relocatable_relocs::RELOC_COPY; | |
6548 | } | |
6549 | }; | |
42cacb20 DE |
6550 | |
6551 | // Scan the relocs during a relocatable link. | |
6552 | ||
6553 | template<int size, bool big_endian> | |
6554 | void | |
6555 | Target_powerpc<size, big_endian>::scan_relocatable_relocs( | |
d83ce4e3 AM |
6556 | Symbol_table* symtab, |
6557 | Layout* layout, | |
6558 | Sized_relobj_file<size, big_endian>* object, | |
6559 | unsigned int data_shndx, | |
6560 | unsigned int sh_type, | |
6561 | const unsigned char* prelocs, | |
6562 | size_t reloc_count, | |
6563 | Output_section* output_section, | |
6564 | bool needs_special_offset_handling, | |
6565 | size_t local_symbol_count, | |
6566 | const unsigned char* plocal_symbols, | |
6567 | Relocatable_relocs* rr) | |
42cacb20 DE |
6568 | { |
6569 | gold_assert(sh_type == elfcpp::SHT_RELA); | |
6570 | ||
42cacb20 | 6571 | gold::scan_relocatable_relocs<size, big_endian, elfcpp::SHT_RELA, |
d83ce4e3 | 6572 | Powerpc_scan_relocatable_reloc>( |
42cacb20 DE |
6573 | symtab, |
6574 | layout, | |
6575 | object, | |
6576 | data_shndx, | |
6577 | prelocs, | |
6578 | reloc_count, | |
6579 | output_section, | |
6580 | needs_special_offset_handling, | |
6581 | local_symbol_count, | |
6582 | plocal_symbols, | |
6583 | rr); | |
6584 | } | |
6585 | ||
7404fe1b | 6586 | // Emit relocations for a section. |
dd93cd0a AM |
6587 | // This is a modified version of the function by the same name in |
6588 | // target-reloc.h. Using relocate_special_relocatable for | |
6589 | // R_PPC_PLTREL24 would require duplication of the entire body of the | |
6590 | // loop, so we may as well duplicate the whole thing. | |
42cacb20 DE |
6591 | |
6592 | template<int size, bool big_endian> | |
6593 | void | |
7404fe1b | 6594 | Target_powerpc<size, big_endian>::relocate_relocs( |
42cacb20 DE |
6595 | const Relocate_info<size, big_endian>* relinfo, |
6596 | unsigned int sh_type, | |
6597 | const unsigned char* prelocs, | |
6598 | size_t reloc_count, | |
6599 | Output_section* output_section, | |
62fe925a | 6600 | typename elfcpp::Elf_types<size>::Elf_Off offset_in_output_section, |
42cacb20 | 6601 | const Relocatable_relocs* rr, |
cf43a2fe | 6602 | unsigned char*, |
dd93cd0a | 6603 | Address view_address, |
cf43a2fe | 6604 | section_size_type, |
42cacb20 DE |
6605 | unsigned char* reloc_view, |
6606 | section_size_type reloc_view_size) | |
6607 | { | |
6608 | gold_assert(sh_type == elfcpp::SHT_RELA); | |
6609 | ||
cf43a2fe AM |
6610 | typedef typename Reloc_types<elfcpp::SHT_RELA, size, big_endian>::Reloc |
6611 | Reltype; | |
6612 | typedef typename Reloc_types<elfcpp::SHT_RELA, size, big_endian>::Reloc_write | |
6613 | Reltype_write; | |
6614 | const int reloc_size | |
6615 | = Reloc_types<elfcpp::SHT_RELA, size, big_endian>::reloc_size; | |
cf43a2fe AM |
6616 | |
6617 | Powerpc_relobj<size, big_endian>* const object | |
6618 | = static_cast<Powerpc_relobj<size, big_endian>*>(relinfo->object); | |
6619 | const unsigned int local_count = object->local_symbol_count(); | |
6620 | unsigned int got2_shndx = object->got2_shndx(); | |
c9269dff | 6621 | Address got2_addend = 0; |
cf43a2fe | 6622 | if (got2_shndx != 0) |
c9269dff AM |
6623 | { |
6624 | got2_addend = object->get_output_section_offset(got2_shndx); | |
6625 | gold_assert(got2_addend != invalid_address); | |
6626 | } | |
cf43a2fe AM |
6627 | |
6628 | unsigned char* pwrite = reloc_view; | |
7404fe1b | 6629 | bool zap_next = false; |
cf43a2fe AM |
6630 | for (size_t i = 0; i < reloc_count; ++i, prelocs += reloc_size) |
6631 | { | |
6632 | Relocatable_relocs::Reloc_strategy strategy = rr->strategy(i); | |
6633 | if (strategy == Relocatable_relocs::RELOC_DISCARD) | |
6634 | continue; | |
6635 | ||
6636 | Reltype reloc(prelocs); | |
6637 | Reltype_write reloc_write(pwrite); | |
6638 | ||
7404fe1b | 6639 | Address offset = reloc.get_r_offset(); |
cf43a2fe | 6640 | typename elfcpp::Elf_types<size>::Elf_WXword r_info = reloc.get_r_info(); |
7404fe1b AM |
6641 | unsigned int r_sym = elfcpp::elf_r_sym<size>(r_info); |
6642 | unsigned int r_type = elfcpp::elf_r_type<size>(r_info); | |
6643 | const unsigned int orig_r_sym = r_sym; | |
6644 | typename elfcpp::Elf_types<size>::Elf_Swxword addend | |
6645 | = reloc.get_r_addend(); | |
6646 | const Symbol* gsym = NULL; | |
6647 | ||
6648 | if (zap_next) | |
6649 | { | |
6650 | // We could arrange to discard these and other relocs for | |
6651 | // tls optimised sequences in the strategy methods, but for | |
6652 | // now do as BFD ld does. | |
6653 | r_type = elfcpp::R_POWERPC_NONE; | |
6654 | zap_next = false; | |
6655 | } | |
cf43a2fe AM |
6656 | |
6657 | // Get the new symbol index. | |
cf43a2fe AM |
6658 | if (r_sym < local_count) |
6659 | { | |
6660 | switch (strategy) | |
6661 | { | |
6662 | case Relocatable_relocs::RELOC_COPY: | |
6663 | case Relocatable_relocs::RELOC_SPECIAL: | |
7404fe1b | 6664 | if (r_sym != 0) |
dd93cd0a | 6665 | { |
7404fe1b AM |
6666 | r_sym = object->symtab_index(r_sym); |
6667 | gold_assert(r_sym != -1U); | |
dd93cd0a | 6668 | } |
cf43a2fe AM |
6669 | break; |
6670 | ||
6671 | case Relocatable_relocs::RELOC_ADJUST_FOR_SECTION_RELA: | |
6672 | { | |
6673 | // We are adjusting a section symbol. We need to find | |
6674 | // the symbol table index of the section symbol for | |
6675 | // the output section corresponding to input section | |
6676 | // in which this symbol is defined. | |
6677 | gold_assert(r_sym < local_count); | |
6678 | bool is_ordinary; | |
6679 | unsigned int shndx = | |
6680 | object->local_symbol_input_shndx(r_sym, &is_ordinary); | |
6681 | gold_assert(is_ordinary); | |
6682 | Output_section* os = object->output_section(shndx); | |
6683 | gold_assert(os != NULL); | |
6684 | gold_assert(os->needs_symtab_index()); | |
7404fe1b | 6685 | r_sym = os->symtab_index(); |
cf43a2fe AM |
6686 | } |
6687 | break; | |
6688 | ||
6689 | default: | |
6690 | gold_unreachable(); | |
6691 | } | |
6692 | } | |
6693 | else | |
6694 | { | |
7404fe1b | 6695 | gsym = object->global_symbol(r_sym); |
cf43a2fe AM |
6696 | gold_assert(gsym != NULL); |
6697 | if (gsym->is_forwarder()) | |
6698 | gsym = relinfo->symtab->resolve_forwards(gsym); | |
6699 | ||
6700 | gold_assert(gsym->has_symtab_index()); | |
7404fe1b | 6701 | r_sym = gsym->symtab_index(); |
cf43a2fe AM |
6702 | } |
6703 | ||
6704 | // Get the new offset--the location in the output section where | |
6705 | // this relocation should be applied. | |
cf43a2fe | 6706 | if (static_cast<Address>(offset_in_output_section) != invalid_address) |
7404fe1b | 6707 | offset += offset_in_output_section; |
cf43a2fe AM |
6708 | else |
6709 | { | |
c9269dff AM |
6710 | section_offset_type sot_offset = |
6711 | convert_types<section_offset_type, Address>(offset); | |
cf43a2fe | 6712 | section_offset_type new_sot_offset = |
c9269dff AM |
6713 | output_section->output_offset(object, relinfo->data_shndx, |
6714 | sot_offset); | |
cf43a2fe | 6715 | gold_assert(new_sot_offset != -1); |
7404fe1b | 6716 | offset = new_sot_offset; |
cf43a2fe AM |
6717 | } |
6718 | ||
dd93cd0a AM |
6719 | // In an object file, r_offset is an offset within the section. |
6720 | // In an executable or dynamic object, generated by | |
6721 | // --emit-relocs, r_offset is an absolute address. | |
7404fe1b | 6722 | if (!parameters->options().relocatable()) |
dd93cd0a | 6723 | { |
7404fe1b | 6724 | offset += view_address; |
dd93cd0a | 6725 | if (static_cast<Address>(offset_in_output_section) != invalid_address) |
7404fe1b | 6726 | offset -= offset_in_output_section; |
dd93cd0a AM |
6727 | } |
6728 | ||
cf43a2fe | 6729 | // Handle the reloc addend based on the strategy. |
cf43a2fe AM |
6730 | if (strategy == Relocatable_relocs::RELOC_COPY) |
6731 | ; | |
6732 | else if (strategy == Relocatable_relocs::RELOC_ADJUST_FOR_SECTION_RELA) | |
6733 | { | |
7404fe1b | 6734 | const Symbol_value<size>* psymval = object->local_symbol(orig_r_sym); |
cf43a2fe AM |
6735 | addend = psymval->value(object, addend); |
6736 | } | |
6737 | else if (strategy == Relocatable_relocs::RELOC_SPECIAL) | |
6738 | { | |
6739 | if (addend >= 32768) | |
6740 | addend += got2_addend; | |
6741 | } | |
6742 | else | |
6743 | gold_unreachable(); | |
6744 | ||
7404fe1b AM |
6745 | if (!parameters->options().relocatable()) |
6746 | { | |
6747 | if (r_type == elfcpp::R_POWERPC_GOT_TLSGD16 | |
6748 | || r_type == elfcpp::R_POWERPC_GOT_TLSGD16_LO | |
6749 | || r_type == elfcpp::R_POWERPC_GOT_TLSGD16_HI | |
6750 | || r_type == elfcpp::R_POWERPC_GOT_TLSGD16_HA) | |
6751 | { | |
6752 | // First instruction of a global dynamic sequence, | |
6753 | // arg setup insn. | |
6754 | const bool final = gsym == NULL || gsym->final_value_is_known(); | |
6755 | switch (this->optimize_tls_gd(final)) | |
6756 | { | |
6757 | case tls::TLSOPT_TO_IE: | |
6758 | r_type += (elfcpp::R_POWERPC_GOT_TPREL16 | |
6759 | - elfcpp::R_POWERPC_GOT_TLSGD16); | |
6760 | break; | |
6761 | case tls::TLSOPT_TO_LE: | |
6762 | if (r_type == elfcpp::R_POWERPC_GOT_TLSGD16 | |
6763 | || r_type == elfcpp::R_POWERPC_GOT_TLSGD16_LO) | |
6764 | r_type = elfcpp::R_POWERPC_TPREL16_HA; | |
6765 | else | |
6766 | { | |
6767 | r_type = elfcpp::R_POWERPC_NONE; | |
6768 | offset -= 2 * big_endian; | |
6769 | } | |
6770 | break; | |
6771 | default: | |
6772 | break; | |
6773 | } | |
6774 | } | |
6775 | else if (r_type == elfcpp::R_POWERPC_GOT_TLSLD16 | |
6776 | || r_type == elfcpp::R_POWERPC_GOT_TLSLD16_LO | |
6777 | || r_type == elfcpp::R_POWERPC_GOT_TLSLD16_HI | |
6778 | || r_type == elfcpp::R_POWERPC_GOT_TLSLD16_HA) | |
6779 | { | |
6780 | // First instruction of a local dynamic sequence, | |
6781 | // arg setup insn. | |
6782 | if (this->optimize_tls_ld() == tls::TLSOPT_TO_LE) | |
6783 | { | |
6784 | if (r_type == elfcpp::R_POWERPC_GOT_TLSLD16 | |
6785 | || r_type == elfcpp::R_POWERPC_GOT_TLSLD16_LO) | |
6786 | { | |
6787 | r_type = elfcpp::R_POWERPC_TPREL16_HA; | |
6788 | const Output_section* os = relinfo->layout->tls_segment() | |
6789 | ->first_section(); | |
6790 | gold_assert(os != NULL); | |
6791 | gold_assert(os->needs_symtab_index()); | |
6792 | r_sym = os->symtab_index(); | |
6793 | addend = dtp_offset; | |
6794 | } | |
6795 | else | |
6796 | { | |
6797 | r_type = elfcpp::R_POWERPC_NONE; | |
6798 | offset -= 2 * big_endian; | |
6799 | } | |
6800 | } | |
6801 | } | |
6802 | else if (r_type == elfcpp::R_POWERPC_GOT_TPREL16 | |
6803 | || r_type == elfcpp::R_POWERPC_GOT_TPREL16_LO | |
6804 | || r_type == elfcpp::R_POWERPC_GOT_TPREL16_HI | |
6805 | || r_type == elfcpp::R_POWERPC_GOT_TPREL16_HA) | |
6806 | { | |
6807 | // First instruction of initial exec sequence. | |
6808 | const bool final = gsym == NULL || gsym->final_value_is_known(); | |
6809 | if (this->optimize_tls_ie(final) == tls::TLSOPT_TO_LE) | |
6810 | { | |
6811 | if (r_type == elfcpp::R_POWERPC_GOT_TPREL16 | |
6812 | || r_type == elfcpp::R_POWERPC_GOT_TPREL16_LO) | |
6813 | r_type = elfcpp::R_POWERPC_TPREL16_HA; | |
6814 | else | |
6815 | { | |
6816 | r_type = elfcpp::R_POWERPC_NONE; | |
6817 | offset -= 2 * big_endian; | |
6818 | } | |
6819 | } | |
6820 | } | |
6821 | else if ((size == 64 && r_type == elfcpp::R_PPC64_TLSGD) | |
6822 | || (size == 32 && r_type == elfcpp::R_PPC_TLSGD)) | |
6823 | { | |
6824 | // Second instruction of a global dynamic sequence, | |
6825 | // the __tls_get_addr call | |
6826 | const bool final = gsym == NULL || gsym->final_value_is_known(); | |
6827 | switch (this->optimize_tls_gd(final)) | |
6828 | { | |
6829 | case tls::TLSOPT_TO_IE: | |
6830 | r_type = elfcpp::R_POWERPC_NONE; | |
6831 | zap_next = true; | |
6832 | break; | |
6833 | case tls::TLSOPT_TO_LE: | |
6834 | r_type = elfcpp::R_POWERPC_TPREL16_LO; | |
6835 | offset += 2 * big_endian; | |
6836 | zap_next = true; | |
6837 | break; | |
6838 | default: | |
6839 | break; | |
6840 | } | |
6841 | } | |
6842 | else if ((size == 64 && r_type == elfcpp::R_PPC64_TLSLD) | |
6843 | || (size == 32 && r_type == elfcpp::R_PPC_TLSLD)) | |
6844 | { | |
6845 | // Second instruction of a local dynamic sequence, | |
6846 | // the __tls_get_addr call | |
6847 | if (this->optimize_tls_ld() == tls::TLSOPT_TO_LE) | |
6848 | { | |
6849 | const Output_section* os = relinfo->layout->tls_segment() | |
6850 | ->first_section(); | |
6851 | gold_assert(os != NULL); | |
6852 | gold_assert(os->needs_symtab_index()); | |
6853 | r_sym = os->symtab_index(); | |
6854 | addend = dtp_offset; | |
6855 | r_type = elfcpp::R_POWERPC_TPREL16_LO; | |
6856 | offset += 2 * big_endian; | |
6857 | zap_next = true; | |
6858 | } | |
6859 | } | |
6860 | else if (r_type == elfcpp::R_POWERPC_TLS) | |
6861 | { | |
6862 | // Second instruction of an initial exec sequence | |
6863 | const bool final = gsym == NULL || gsym->final_value_is_known(); | |
6864 | if (this->optimize_tls_ie(final) == tls::TLSOPT_TO_LE) | |
6865 | { | |
6866 | r_type = elfcpp::R_POWERPC_TPREL16_LO; | |
6867 | offset += 2 * big_endian; | |
6868 | } | |
6869 | } | |
6870 | } | |
6871 | ||
6872 | reloc_write.put_r_offset(offset); | |
6873 | reloc_write.put_r_info(elfcpp::elf_r_info<size>(r_sym, r_type)); | |
6874 | reloc_write.put_r_addend(addend); | |
cf43a2fe AM |
6875 | |
6876 | pwrite += reloc_size; | |
6877 | } | |
6878 | ||
6879 | gold_assert(static_cast<section_size_type>(pwrite - reloc_view) | |
6880 | == reloc_view_size); | |
42cacb20 DE |
6881 | } |
6882 | ||
ec661b9d | 6883 | // Return the value to use for a dynamic symbol which requires special |
42cacb20 DE |
6884 | // treatment. This is how we support equality comparisons of function |
6885 | // pointers across shared library boundaries, as described in the | |
6886 | // processor specific ABI supplement. | |
6887 | ||
6888 | template<int size, bool big_endian> | |
6889 | uint64_t | |
6890 | Target_powerpc<size, big_endian>::do_dynsym_value(const Symbol* gsym) const | |
6891 | { | |
cf43a2fe AM |
6892 | if (size == 32) |
6893 | { | |
6894 | gold_assert(gsym->is_from_dynobj() && gsym->has_plt_offset()); | |
ec661b9d AM |
6895 | for (typename Stub_tables::const_iterator p = this->stub_tables_.begin(); |
6896 | p != this->stub_tables_.end(); | |
6897 | ++p) | |
6898 | { | |
6899 | Address off = (*p)->find_plt_call_entry(gsym); | |
6900 | if (off != invalid_address) | |
6901 | return (*p)->stub_address() + off; | |
6902 | } | |
c9824451 | 6903 | } |
ec661b9d | 6904 | gold_unreachable(); |
c9824451 AM |
6905 | } |
6906 | ||
6907 | // Return the PLT address to use for a local symbol. | |
6908 | template<int size, bool big_endian> | |
6909 | uint64_t | |
6910 | Target_powerpc<size, big_endian>::do_plt_address_for_local( | |
6911 | const Relobj* object, | |
6912 | unsigned int symndx) const | |
6913 | { | |
6914 | if (size == 32) | |
6915 | { | |
6916 | const Sized_relobj<size, big_endian>* relobj | |
6917 | = static_cast<const Sized_relobj<size, big_endian>*>(object); | |
ec661b9d AM |
6918 | for (typename Stub_tables::const_iterator p = this->stub_tables_.begin(); |
6919 | p != this->stub_tables_.end(); | |
6920 | ++p) | |
6921 | { | |
6922 | Address off = (*p)->find_plt_call_entry(relobj->sized_relobj(), | |
6923 | symndx); | |
6924 | if (off != invalid_address) | |
6925 | return (*p)->stub_address() + off; | |
6926 | } | |
c9824451 | 6927 | } |
ec661b9d | 6928 | gold_unreachable(); |
c9824451 AM |
6929 | } |
6930 | ||
6931 | // Return the PLT address to use for a global symbol. | |
6932 | template<int size, bool big_endian> | |
6933 | uint64_t | |
6934 | Target_powerpc<size, big_endian>::do_plt_address_for_global( | |
6935 | const Symbol* gsym) const | |
6936 | { | |
6937 | if (size == 32) | |
6938 | { | |
ec661b9d AM |
6939 | for (typename Stub_tables::const_iterator p = this->stub_tables_.begin(); |
6940 | p != this->stub_tables_.end(); | |
6941 | ++p) | |
6942 | { | |
6943 | Address off = (*p)->find_plt_call_entry(gsym); | |
6944 | if (off != invalid_address) | |
6945 | return (*p)->stub_address() + off; | |
6946 | } | |
cf43a2fe | 6947 | } |
ec661b9d | 6948 | gold_unreachable(); |
42cacb20 DE |
6949 | } |
6950 | ||
bd73a62d AM |
6951 | // Return the offset to use for the GOT_INDX'th got entry which is |
6952 | // for a local tls symbol specified by OBJECT, SYMNDX. | |
6953 | template<int size, bool big_endian> | |
6954 | int64_t | |
6955 | Target_powerpc<size, big_endian>::do_tls_offset_for_local( | |
6956 | const Relobj* object, | |
6957 | unsigned int symndx, | |
6958 | unsigned int got_indx) const | |
6959 | { | |
6960 | const Powerpc_relobj<size, big_endian>* ppc_object | |
6961 | = static_cast<const Powerpc_relobj<size, big_endian>*>(object); | |
6962 | if (ppc_object->local_symbol(symndx)->is_tls_symbol()) | |
6963 | { | |
6964 | for (Got_type got_type = GOT_TYPE_TLSGD; | |
6965 | got_type <= GOT_TYPE_TPREL; | |
6966 | got_type = Got_type(got_type + 1)) | |
6967 | if (ppc_object->local_has_got_offset(symndx, got_type)) | |
6968 | { | |
6969 | unsigned int off = ppc_object->local_got_offset(symndx, got_type); | |
6970 | if (got_type == GOT_TYPE_TLSGD) | |
6971 | off += size / 8; | |
6972 | if (off == got_indx * (size / 8)) | |
6973 | { | |
6974 | if (got_type == GOT_TYPE_TPREL) | |
6975 | return -tp_offset; | |
6976 | else | |
6977 | return -dtp_offset; | |
6978 | } | |
6979 | } | |
6980 | } | |
6981 | gold_unreachable(); | |
6982 | } | |
6983 | ||
6984 | // Return the offset to use for the GOT_INDX'th got entry which is | |
6985 | // for global tls symbol GSYM. | |
6986 | template<int size, bool big_endian> | |
6987 | int64_t | |
6988 | Target_powerpc<size, big_endian>::do_tls_offset_for_global( | |
6989 | Symbol* gsym, | |
6990 | unsigned int got_indx) const | |
6991 | { | |
6992 | if (gsym->type() == elfcpp::STT_TLS) | |
6993 | { | |
6994 | for (Got_type got_type = GOT_TYPE_TLSGD; | |
6995 | got_type <= GOT_TYPE_TPREL; | |
6996 | got_type = Got_type(got_type + 1)) | |
6997 | if (gsym->has_got_offset(got_type)) | |
6998 | { | |
6999 | unsigned int off = gsym->got_offset(got_type); | |
7000 | if (got_type == GOT_TYPE_TLSGD) | |
7001 | off += size / 8; | |
7002 | if (off == got_indx * (size / 8)) | |
7003 | { | |
7004 | if (got_type == GOT_TYPE_TPREL) | |
7005 | return -tp_offset; | |
7006 | else | |
7007 | return -dtp_offset; | |
7008 | } | |
7009 | } | |
7010 | } | |
7011 | gold_unreachable(); | |
7012 | } | |
7013 | ||
42cacb20 DE |
7014 | // The selector for powerpc object files. |
7015 | ||
7016 | template<int size, bool big_endian> | |
7017 | class Target_selector_powerpc : public Target_selector | |
7018 | { | |
7019 | public: | |
7020 | Target_selector_powerpc() | |
edc27beb AM |
7021 | : Target_selector(size == 64 ? elfcpp::EM_PPC64 : elfcpp::EM_PPC, |
7022 | size, big_endian, | |
03ef7571 ILT |
7023 | (size == 64 |
7024 | ? (big_endian ? "elf64-powerpc" : "elf64-powerpcle") | |
7025 | : (big_endian ? "elf32-powerpc" : "elf32-powerpcle")), | |
7026 | (size == 64 | |
7027 | ? (big_endian ? "elf64ppc" : "elf64lppc") | |
7028 | : (big_endian ? "elf32ppc" : "elf32lppc"))) | |
42cacb20 DE |
7029 | { } |
7030 | ||
2e702c99 RM |
7031 | virtual Target* |
7032 | do_instantiate_target() | |
7f055c20 | 7033 | { return new Target_powerpc<size, big_endian>(); } |
42cacb20 DE |
7034 | }; |
7035 | ||
7036 | Target_selector_powerpc<32, true> target_selector_ppc32; | |
7037 | Target_selector_powerpc<32, false> target_selector_ppc32le; | |
7038 | Target_selector_powerpc<64, true> target_selector_ppc64; | |
7039 | Target_selector_powerpc<64, false> target_selector_ppc64le; | |
7040 | ||
decdd3bc AM |
7041 | // Instantiate these constants for -O0 |
7042 | template<int size, bool big_endian> | |
7043 | const int Output_data_glink<size, big_endian>::pltresolve_size; | |
7044 | template<int size, bool big_endian> | |
7045 | const typename Stub_table<size, big_endian>::Address | |
7046 | Stub_table<size, big_endian>::invalid_address; | |
7047 | template<int size, bool big_endian> | |
7048 | const typename Target_powerpc<size, big_endian>::Address | |
7049 | Target_powerpc<size, big_endian>::invalid_address; | |
7050 | ||
42cacb20 | 7051 | } // End anonymous namespace. |