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