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42cacb20 DE |
1 | // powerpc.cc -- powerpc target support for gold. |
2 | ||
0e804863 | 3 | // Copyright 2008, 2009, 2010, 2011, 2012, 2013 Free Software Foundation, Inc. |
42cacb20 DE |
4 | // Written by David S. Miller <davem@davemloft.net> |
5 | // and David Edelsohn <edelsohn@gnu.org> | |
6 | ||
7 | // This file is part of gold. | |
8 | ||
9 | // This program is free software; you can redistribute it and/or modify | |
10 | // it under the terms of the GNU General Public License as published by | |
11 | // the Free Software Foundation; either version 3 of the License, or | |
12 | // (at your option) any later version. | |
13 | ||
14 | // This program is distributed in the hope that it will be useful, | |
15 | // but WITHOUT ANY WARRANTY; without even the implied warranty of | |
16 | // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
17 | // GNU General Public License for more details. | |
18 | ||
19 | // You should have received a copy of the GNU General Public License | |
20 | // along with this program; if not, write to the Free Software | |
21 | // Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston, | |
22 | // MA 02110-1301, USA. | |
23 | ||
24 | #include "gold.h" | |
25 | ||
dc3714f3 | 26 | #include <set> |
ec661b9d | 27 | #include <algorithm> |
42cacb20 | 28 | #include "elfcpp.h" |
9d5781f8 | 29 | #include "dwarf.h" |
42cacb20 DE |
30 | #include "parameters.h" |
31 | #include "reloc.h" | |
32 | #include "powerpc.h" | |
33 | #include "object.h" | |
34 | #include "symtab.h" | |
35 | #include "layout.h" | |
36 | #include "output.h" | |
37 | #include "copy-relocs.h" | |
38 | #include "target.h" | |
39 | #include "target-reloc.h" | |
40 | #include "target-select.h" | |
41 | #include "tls.h" | |
42 | #include "errors.h" | |
f345227a | 43 | #include "gc.h" |
42cacb20 DE |
44 | |
45 | namespace | |
46 | { | |
47 | ||
48 | using namespace gold; | |
49 | ||
50 | template<int size, bool big_endian> | |
51 | class Output_data_plt_powerpc; | |
52 | ||
ec661b9d AM |
53 | template<int size, bool big_endian> |
54 | class Output_data_brlt_powerpc; | |
55 | ||
cf43a2fe AM |
56 | template<int size, bool big_endian> |
57 | class Output_data_got_powerpc; | |
58 | ||
59 | template<int size, bool big_endian> | |
60 | class Output_data_glink; | |
61 | ||
ec661b9d AM |
62 | template<int size, bool big_endian> |
63 | class Stub_table; | |
64 | ||
4d9aa155 AM |
65 | inline bool |
66 | is_branch_reloc(unsigned int r_type); | |
67 | ||
cf43a2fe AM |
68 | template<int size, bool big_endian> |
69 | class Powerpc_relobj : public Sized_relobj_file<size, big_endian> | |
70 | { | |
71 | public: | |
dd93cd0a | 72 | typedef typename elfcpp::Elf_types<size>::Elf_Addr Address; |
e81fea4d AM |
73 | typedef Unordered_set<Section_id, Section_id_hash> Section_refs; |
74 | typedef Unordered_map<Address, Section_refs> Access_from; | |
c9269dff | 75 | |
cf43a2fe AM |
76 | Powerpc_relobj(const std::string& name, Input_file* input_file, off_t offset, |
77 | const typename elfcpp::Ehdr<size, big_endian>& ehdr) | |
78 | : Sized_relobj_file<size, big_endian>(name, input_file, offset, ehdr), | |
d8f5a274 | 79 | special_(0), has_small_toc_reloc_(false), opd_valid_(false), |
906b9150 | 80 | opd_ent_(), access_from_map_(), has14_(), stub_table_() |
cf43a2fe AM |
81 | { } |
82 | ||
83 | ~Powerpc_relobj() | |
84 | { } | |
85 | ||
c9269dff | 86 | // The .got2 section shndx. |
cf43a2fe AM |
87 | unsigned int |
88 | got2_shndx() const | |
89 | { | |
90 | if (size == 32) | |
c9269dff | 91 | return this->special_; |
cf43a2fe AM |
92 | else |
93 | return 0; | |
94 | } | |
95 | ||
c9269dff AM |
96 | // The .opd section shndx. |
97 | unsigned int | |
98 | opd_shndx() const | |
99 | { | |
100 | if (size == 32) | |
101 | return 0; | |
102 | else | |
103 | return this->special_; | |
104 | } | |
105 | ||
106 | // Init OPD entry arrays. | |
107 | void | |
108 | init_opd(size_t opd_size) | |
109 | { | |
110 | size_t count = this->opd_ent_ndx(opd_size); | |
bfdfa4cd | 111 | this->opd_ent_.resize(count); |
c9269dff AM |
112 | } |
113 | ||
114 | // Return section and offset of function entry for .opd + R_OFF. | |
e81fea4d AM |
115 | unsigned int |
116 | get_opd_ent(Address r_off, Address* value = NULL) const | |
c9269dff AM |
117 | { |
118 | size_t ndx = this->opd_ent_ndx(r_off); | |
bfdfa4cd AM |
119 | gold_assert(ndx < this->opd_ent_.size()); |
120 | gold_assert(this->opd_ent_[ndx].shndx != 0); | |
e81fea4d | 121 | if (value != NULL) |
bfdfa4cd AM |
122 | *value = this->opd_ent_[ndx].off; |
123 | return this->opd_ent_[ndx].shndx; | |
c9269dff AM |
124 | } |
125 | ||
126 | // Set section and offset of function entry for .opd + R_OFF. | |
127 | void | |
dd93cd0a | 128 | set_opd_ent(Address r_off, unsigned int shndx, Address value) |
c9269dff AM |
129 | { |
130 | size_t ndx = this->opd_ent_ndx(r_off); | |
bfdfa4cd AM |
131 | gold_assert(ndx < this->opd_ent_.size()); |
132 | this->opd_ent_[ndx].shndx = shndx; | |
133 | this->opd_ent_[ndx].off = value; | |
134 | } | |
135 | ||
136 | // Return discard flag for .opd + R_OFF. | |
137 | bool | |
138 | get_opd_discard(Address r_off) const | |
139 | { | |
140 | size_t ndx = this->opd_ent_ndx(r_off); | |
141 | gold_assert(ndx < this->opd_ent_.size()); | |
142 | return this->opd_ent_[ndx].discard; | |
143 | } | |
144 | ||
145 | // Set discard flag for .opd + R_OFF. | |
146 | void | |
147 | set_opd_discard(Address r_off) | |
148 | { | |
149 | size_t ndx = this->opd_ent_ndx(r_off); | |
150 | gold_assert(ndx < this->opd_ent_.size()); | |
151 | this->opd_ent_[ndx].discard = true; | |
c9269dff AM |
152 | } |
153 | ||
e81fea4d AM |
154 | bool |
155 | opd_valid() const | |
156 | { return this->opd_valid_; } | |
157 | ||
158 | void | |
159 | set_opd_valid() | |
160 | { this->opd_valid_ = true; } | |
161 | ||
c9269dff AM |
162 | // Examine .rela.opd to build info about function entry points. |
163 | void | |
164 | scan_opd_relocs(size_t reloc_count, | |
165 | const unsigned char* prelocs, | |
166 | const unsigned char* plocal_syms); | |
167 | ||
26a4e9cb AM |
168 | // Perform the Sized_relobj_file method, then set up opd info from |
169 | // .opd relocs. | |
c9269dff AM |
170 | void |
171 | do_read_relocs(Read_relocs_data*); | |
172 | ||
cf43a2fe AM |
173 | bool |
174 | do_find_special_sections(Read_symbols_data* sd); | |
175 | ||
ec4dbad3 AM |
176 | // Adjust this local symbol value. Return false if the symbol |
177 | // should be discarded from the output file. | |
178 | bool | |
179 | do_adjust_local_symbol(Symbol_value<size>* lv) const | |
180 | { | |
181 | if (size == 64 && this->opd_shndx() != 0) | |
182 | { | |
183 | bool is_ordinary; | |
184 | if (lv->input_shndx(&is_ordinary) != this->opd_shndx()) | |
185 | return true; | |
186 | if (this->get_opd_discard(lv->input_value())) | |
187 | return false; | |
188 | } | |
189 | return true; | |
190 | } | |
191 | ||
6c77229c AM |
192 | Access_from* |
193 | access_from_map() | |
194 | { return &this->access_from_map_; } | |
195 | ||
196 | // Add a reference from SRC_OBJ, SRC_INDX to this object's .opd | |
197 | // section at DST_OFF. | |
198 | void | |
199 | add_reference(Object* src_obj, | |
200 | unsigned int src_indx, | |
201 | typename elfcpp::Elf_types<size>::Elf_Addr dst_off) | |
202 | { | |
203 | Section_id src_id(src_obj, src_indx); | |
204 | this->access_from_map_[dst_off].insert(src_id); | |
205 | } | |
206 | ||
207 | // Add a reference to the code section specified by the .opd entry | |
208 | // at DST_OFF | |
209 | void | |
210 | add_gc_mark(typename elfcpp::Elf_types<size>::Elf_Addr dst_off) | |
211 | { | |
212 | size_t ndx = this->opd_ent_ndx(dst_off); | |
213 | if (ndx >= this->opd_ent_.size()) | |
214 | this->opd_ent_.resize(ndx + 1); | |
215 | this->opd_ent_[ndx].gc_mark = true; | |
216 | } | |
217 | ||
218 | void | |
219 | process_gc_mark(Symbol_table* symtab) | |
220 | { | |
221 | for (size_t i = 0; i < this->opd_ent_.size(); i++) | |
222 | if (this->opd_ent_[i].gc_mark) | |
223 | { | |
224 | unsigned int shndx = this->opd_ent_[i].shndx; | |
225 | symtab->gc()->worklist().push(Section_id(this, shndx)); | |
226 | } | |
227 | } | |
228 | ||
dd93cd0a AM |
229 | // Return offset in output GOT section that this object will use |
230 | // as a TOC pointer. Won't be just a constant with multi-toc support. | |
231 | Address | |
232 | toc_base_offset() const | |
233 | { return 0x8000; } | |
234 | ||
d8f5a274 AM |
235 | void |
236 | set_has_small_toc_reloc() | |
237 | { has_small_toc_reloc_ = true; } | |
238 | ||
239 | bool | |
240 | has_small_toc_reloc() const | |
241 | { return has_small_toc_reloc_; } | |
242 | ||
ec661b9d AM |
243 | void |
244 | set_has_14bit_branch(unsigned int shndx) | |
245 | { | |
246 | if (shndx >= this->has14_.size()) | |
247 | this->has14_.resize(shndx + 1); | |
248 | this->has14_[shndx] = true; | |
249 | } | |
250 | ||
251 | bool | |
252 | has_14bit_branch(unsigned int shndx) const | |
253 | { return shndx < this->has14_.size() && this->has14_[shndx]; } | |
254 | ||
255 | void | |
256 | set_stub_table(unsigned int shndx, Stub_table<size, big_endian>* stub_table) | |
257 | { | |
258 | if (shndx >= this->stub_table_.size()) | |
259 | this->stub_table_.resize(shndx + 1); | |
260 | this->stub_table_[shndx] = stub_table; | |
261 | } | |
262 | ||
263 | Stub_table<size, big_endian>* | |
264 | stub_table(unsigned int shndx) | |
265 | { | |
266 | if (shndx < this->stub_table_.size()) | |
267 | return this->stub_table_[shndx]; | |
268 | return NULL; | |
269 | } | |
270 | ||
cf43a2fe | 271 | private: |
bfdfa4cd AM |
272 | struct Opd_ent |
273 | { | |
274 | unsigned int shndx; | |
c6de8ed4 AM |
275 | bool discard : 1; |
276 | bool gc_mark : 1; | |
26a4e9cb | 277 | Address off; |
bfdfa4cd AM |
278 | }; |
279 | ||
280 | // Return index into opd_ent_ array for .opd entry at OFF. | |
281 | // .opd entries are 24 bytes long, but they can be spaced 16 bytes | |
282 | // apart when the language doesn't use the last 8-byte word, the | |
283 | // environment pointer. Thus dividing the entry section offset by | |
284 | // 16 will give an index into opd_ent_ that works for either layout | |
285 | // of .opd. (It leaves some elements of the vector unused when .opd | |
286 | // entries are spaced 24 bytes apart, but we don't know the spacing | |
287 | // until relocations are processed, and in any case it is possible | |
288 | // for an object to have some entries spaced 16 bytes apart and | |
289 | // others 24 bytes apart.) | |
c9269dff AM |
290 | size_t |
291 | opd_ent_ndx(size_t off) const | |
292 | { return off >> 4;} | |
293 | ||
294 | // For 32-bit the .got2 section shdnx, for 64-bit the .opd section shndx. | |
295 | unsigned int special_; | |
bfdfa4cd | 296 | |
d8f5a274 AM |
297 | // For 64-bit, whether this object uses small model relocs to access |
298 | // the toc. | |
299 | bool has_small_toc_reloc_; | |
300 | ||
bfdfa4cd AM |
301 | // Set at the start of gc_process_relocs, when we know opd_ent_ |
302 | // vector is valid. The flag could be made atomic and set in | |
303 | // do_read_relocs with memory_order_release and then tested with | |
304 | // memory_order_acquire, potentially resulting in fewer entries in | |
305 | // access_from_map_. | |
306 | bool opd_valid_; | |
307 | ||
c9269dff AM |
308 | // The first 8-byte word of an OPD entry gives the address of the |
309 | // entry point of the function. Relocatable object files have a | |
bfdfa4cd | 310 | // relocation on this word. The following vector records the |
c9269dff | 311 | // section and offset specified by these relocations. |
bfdfa4cd AM |
312 | std::vector<Opd_ent> opd_ent_; |
313 | ||
e81fea4d | 314 | // References made to this object's .opd section when running |
bfdfa4cd AM |
315 | // gc_process_relocs for another object, before the opd_ent_ vector |
316 | // is valid for this object. | |
e81fea4d | 317 | Access_from access_from_map_; |
ec661b9d AM |
318 | |
319 | // Whether input section has a 14-bit branch reloc. | |
320 | std::vector<bool> has14_; | |
321 | ||
322 | // The stub table to use for a given input section. | |
323 | std::vector<Stub_table<size, big_endian>*> stub_table_; | |
cf43a2fe AM |
324 | }; |
325 | ||
dc3714f3 AM |
326 | template<int size, bool big_endian> |
327 | class Powerpc_dynobj : public Sized_dynobj<size, big_endian> | |
328 | { | |
329 | public: | |
330 | typedef typename elfcpp::Elf_types<size>::Elf_Addr Address; | |
331 | ||
332 | Powerpc_dynobj(const std::string& name, Input_file* input_file, off_t offset, | |
333 | const typename elfcpp::Ehdr<size, big_endian>& ehdr) | |
334 | : Sized_dynobj<size, big_endian>(name, input_file, offset, ehdr), | |
335 | opd_shndx_(0), opd_ent_() | |
336 | { } | |
337 | ||
338 | ~Powerpc_dynobj() | |
339 | { } | |
340 | ||
341 | // Call Sized_dynobj::do_read_symbols to read the symbols then | |
342 | // read .opd from a dynamic object, filling in opd_ent_ vector, | |
343 | void | |
344 | do_read_symbols(Read_symbols_data*); | |
345 | ||
346 | // The .opd section shndx. | |
347 | unsigned int | |
348 | opd_shndx() const | |
349 | { | |
350 | return this->opd_shndx_; | |
351 | } | |
352 | ||
353 | // The .opd section address. | |
354 | Address | |
355 | opd_address() const | |
356 | { | |
357 | return this->opd_address_; | |
358 | } | |
359 | ||
360 | // Init OPD entry arrays. | |
361 | void | |
362 | init_opd(size_t opd_size) | |
363 | { | |
364 | size_t count = this->opd_ent_ndx(opd_size); | |
365 | this->opd_ent_.resize(count); | |
366 | } | |
367 | ||
368 | // Return section and offset of function entry for .opd + R_OFF. | |
369 | unsigned int | |
370 | get_opd_ent(Address r_off, Address* value = NULL) const | |
371 | { | |
372 | size_t ndx = this->opd_ent_ndx(r_off); | |
373 | gold_assert(ndx < this->opd_ent_.size()); | |
374 | gold_assert(this->opd_ent_[ndx].shndx != 0); | |
375 | if (value != NULL) | |
376 | *value = this->opd_ent_[ndx].off; | |
377 | return this->opd_ent_[ndx].shndx; | |
378 | } | |
379 | ||
380 | // Set section and offset of function entry for .opd + R_OFF. | |
381 | void | |
382 | set_opd_ent(Address r_off, unsigned int shndx, Address value) | |
383 | { | |
384 | size_t ndx = this->opd_ent_ndx(r_off); | |
385 | gold_assert(ndx < this->opd_ent_.size()); | |
386 | this->opd_ent_[ndx].shndx = shndx; | |
387 | this->opd_ent_[ndx].off = value; | |
388 | } | |
389 | ||
390 | private: | |
391 | // Used to specify extent of executable sections. | |
392 | struct Sec_info | |
393 | { | |
394 | Sec_info(Address start_, Address len_, unsigned int shndx_) | |
395 | : start(start_), len(len_), shndx(shndx_) | |
396 | { } | |
397 | ||
398 | bool | |
399 | operator<(const Sec_info& that) const | |
400 | { return this->start < that.start; } | |
401 | ||
402 | Address start; | |
403 | Address len; | |
404 | unsigned int shndx; | |
405 | }; | |
406 | ||
407 | struct Opd_ent | |
408 | { | |
409 | unsigned int shndx; | |
410 | Address off; | |
411 | }; | |
412 | ||
413 | // Return index into opd_ent_ array for .opd entry at OFF. | |
414 | size_t | |
415 | opd_ent_ndx(size_t off) const | |
416 | { return off >> 4;} | |
417 | ||
418 | // For 64-bit the .opd section shndx and address. | |
419 | unsigned int opd_shndx_; | |
420 | Address opd_address_; | |
421 | ||
422 | // The first 8-byte word of an OPD entry gives the address of the | |
423 | // entry point of the function. Records the section and offset | |
424 | // corresponding to the address. Note that in dynamic objects, | |
425 | // offset is *not* relative to the section. | |
426 | std::vector<Opd_ent> opd_ent_; | |
427 | }; | |
428 | ||
42cacb20 DE |
429 | template<int size, bool big_endian> |
430 | class Target_powerpc : public Sized_target<size, big_endian> | |
431 | { | |
432 | public: | |
d83ce4e3 AM |
433 | typedef |
434 | Output_data_reloc<elfcpp::SHT_RELA, true, size, big_endian> Reloc_section; | |
c9269dff | 435 | typedef typename elfcpp::Elf_types<size>::Elf_Addr Address; |
dd93cd0a | 436 | typedef typename elfcpp::Elf_types<size>::Elf_Swxword Signed_address; |
c9269dff | 437 | static const Address invalid_address = static_cast<Address>(0) - 1; |
dd93cd0a AM |
438 | // Offset of tp and dtp pointers from start of TLS block. |
439 | static const Address tp_offset = 0x7000; | |
440 | static const Address dtp_offset = 0x8000; | |
42cacb20 DE |
441 | |
442 | Target_powerpc() | |
443 | : Sized_target<size, big_endian>(&powerpc_info), | |
ec661b9d AM |
444 | got_(NULL), plt_(NULL), iplt_(NULL), brlt_section_(NULL), |
445 | glink_(NULL), rela_dyn_(NULL), copy_relocs_(elfcpp::R_POWERPC_COPY), | |
43819297 | 446 | tlsld_got_offset_(-1U), |
9e69ed50 AM |
447 | stub_tables_(), branch_lookup_table_(), branch_info_(), |
448 | plt_thread_safe_(false) | |
42cacb20 DE |
449 | { |
450 | } | |
451 | ||
2e702c99 | 452 | // Process the relocations to determine unreferenced sections for |
6d03d481 ST |
453 | // garbage collection. |
454 | void | |
ad0f2072 | 455 | gc_process_relocs(Symbol_table* symtab, |
2e702c99 RM |
456 | Layout* layout, |
457 | Sized_relobj_file<size, big_endian>* object, | |
458 | unsigned int data_shndx, | |
459 | unsigned int sh_type, | |
460 | const unsigned char* prelocs, | |
461 | size_t reloc_count, | |
462 | Output_section* output_section, | |
463 | bool needs_special_offset_handling, | |
464 | size_t local_symbol_count, | |
465 | const unsigned char* plocal_symbols); | |
6d03d481 | 466 | |
42cacb20 DE |
467 | // Scan the relocations to look for symbol adjustments. |
468 | void | |
ad0f2072 | 469 | scan_relocs(Symbol_table* symtab, |
42cacb20 | 470 | Layout* layout, |
6fa2a40b | 471 | Sized_relobj_file<size, big_endian>* object, |
42cacb20 DE |
472 | unsigned int data_shndx, |
473 | unsigned int sh_type, | |
474 | const unsigned char* prelocs, | |
475 | size_t reloc_count, | |
476 | Output_section* output_section, | |
477 | bool needs_special_offset_handling, | |
478 | size_t local_symbol_count, | |
479 | const unsigned char* plocal_symbols); | |
921b5322 AM |
480 | |
481 | // Map input .toc section to output .got section. | |
482 | const char* | |
483 | do_output_section_name(const Relobj*, const char* name, size_t* plen) const | |
484 | { | |
485 | if (size == 64 && strcmp(name, ".toc") == 0) | |
486 | { | |
487 | *plen = 4; | |
488 | return ".got"; | |
489 | } | |
490 | return NULL; | |
491 | } | |
492 | ||
f3a0ed29 AM |
493 | // Provide linker defined save/restore functions. |
494 | void | |
495 | define_save_restore_funcs(Layout*, Symbol_table*); | |
496 | ||
ec661b9d AM |
497 | // No stubs unless a final link. |
498 | bool | |
499 | do_may_relax() const | |
500 | { return !parameters->options().relocatable(); } | |
501 | ||
502 | bool | |
503 | do_relax(int, const Input_objects*, Symbol_table*, Layout*, const Task*); | |
504 | ||
9d5781f8 AM |
505 | void |
506 | do_plt_fde_location(const Output_data*, unsigned char*, | |
507 | uint64_t*, off_t*) const; | |
508 | ||
ec661b9d AM |
509 | // Stash info about branches, for stub generation. |
510 | void | |
511 | push_branch(Powerpc_relobj<size, big_endian>* ppc_object, | |
512 | unsigned int data_shndx, Address r_offset, | |
513 | unsigned int r_type, unsigned int r_sym, Address addend) | |
514 | { | |
515 | Branch_info info(ppc_object, data_shndx, r_offset, r_type, r_sym, addend); | |
516 | this->branch_info_.push_back(info); | |
517 | if (r_type == elfcpp::R_POWERPC_REL14 | |
518 | || r_type == elfcpp::R_POWERPC_REL14_BRTAKEN | |
519 | || r_type == elfcpp::R_POWERPC_REL14_BRNTAKEN) | |
520 | ppc_object->set_has_14bit_branch(data_shndx); | |
521 | } | |
522 | ||
523 | Stub_table<size, big_endian>* | |
524 | new_stub_table(); | |
525 | ||
f43ba157 AM |
526 | void |
527 | do_define_standard_symbols(Symbol_table*, Layout*); | |
528 | ||
42cacb20 DE |
529 | // Finalize the sections. |
530 | void | |
f59f41f3 | 531 | do_finalize_sections(Layout*, const Input_objects*, Symbol_table*); |
42cacb20 DE |
532 | |
533 | // Return the value to use for a dynamic which requires special | |
534 | // treatment. | |
535 | uint64_t | |
536 | do_dynsym_value(const Symbol*) const; | |
537 | ||
c9824451 AM |
538 | // Return the PLT address to use for a local symbol. |
539 | uint64_t | |
540 | do_plt_address_for_local(const Relobj*, unsigned int) const; | |
541 | ||
542 | // Return the PLT address to use for a global symbol. | |
543 | uint64_t | |
544 | do_plt_address_for_global(const Symbol*) const; | |
545 | ||
bd73a62d AM |
546 | // Return the offset to use for the GOT_INDX'th got entry which is |
547 | // for a local tls symbol specified by OBJECT, SYMNDX. | |
548 | int64_t | |
549 | do_tls_offset_for_local(const Relobj* object, | |
550 | unsigned int symndx, | |
551 | unsigned int got_indx) const; | |
552 | ||
553 | // Return the offset to use for the GOT_INDX'th got entry which is | |
554 | // for global tls symbol GSYM. | |
555 | int64_t | |
556 | do_tls_offset_for_global(Symbol* gsym, unsigned int got_indx) const; | |
557 | ||
dc3714f3 AM |
558 | void |
559 | do_function_location(Symbol_location*) const; | |
560 | ||
4d9aa155 AM |
561 | bool |
562 | do_can_check_for_function_pointers() const | |
563 | { return true; } | |
564 | ||
42cacb20 DE |
565 | // Relocate a section. |
566 | void | |
567 | relocate_section(const Relocate_info<size, big_endian>*, | |
568 | unsigned int sh_type, | |
569 | const unsigned char* prelocs, | |
570 | size_t reloc_count, | |
571 | Output_section* output_section, | |
572 | bool needs_special_offset_handling, | |
573 | unsigned char* view, | |
c9269dff | 574 | Address view_address, |
364c7fa5 ILT |
575 | section_size_type view_size, |
576 | const Reloc_symbol_changes*); | |
42cacb20 DE |
577 | |
578 | // Scan the relocs during a relocatable link. | |
579 | void | |
ad0f2072 | 580 | scan_relocatable_relocs(Symbol_table* symtab, |
42cacb20 | 581 | Layout* layout, |
6fa2a40b | 582 | Sized_relobj_file<size, big_endian>* object, |
42cacb20 DE |
583 | unsigned int data_shndx, |
584 | unsigned int sh_type, | |
585 | const unsigned char* prelocs, | |
586 | size_t reloc_count, | |
587 | Output_section* output_section, | |
588 | bool needs_special_offset_handling, | |
589 | size_t local_symbol_count, | |
590 | const unsigned char* plocal_symbols, | |
591 | Relocatable_relocs*); | |
592 | ||
7404fe1b | 593 | // Emit relocations for a section. |
42cacb20 | 594 | void |
7404fe1b AM |
595 | relocate_relocs(const Relocate_info<size, big_endian>*, |
596 | unsigned int sh_type, | |
597 | const unsigned char* prelocs, | |
598 | size_t reloc_count, | |
599 | Output_section* output_section, | |
62fe925a RM |
600 | typename elfcpp::Elf_types<size>::Elf_Off |
601 | offset_in_output_section, | |
7404fe1b AM |
602 | const Relocatable_relocs*, |
603 | unsigned char*, | |
604 | Address view_address, | |
605 | section_size_type, | |
606 | unsigned char* reloc_view, | |
607 | section_size_type reloc_view_size); | |
42cacb20 DE |
608 | |
609 | // Return whether SYM is defined by the ABI. | |
610 | bool | |
9c2d0ef9 | 611 | do_is_defined_by_abi(const Symbol* sym) const |
42cacb20 | 612 | { |
cf43a2fe | 613 | return strcmp(sym->name(), "__tls_get_addr") == 0; |
42cacb20 DE |
614 | } |
615 | ||
616 | // Return the size of the GOT section. | |
617 | section_size_type | |
0e70b911 | 618 | got_size() const |
42cacb20 DE |
619 | { |
620 | gold_assert(this->got_ != NULL); | |
621 | return this->got_->data_size(); | |
622 | } | |
623 | ||
cf43a2fe AM |
624 | // Get the PLT section. |
625 | const Output_data_plt_powerpc<size, big_endian>* | |
626 | plt_section() const | |
627 | { | |
628 | gold_assert(this->plt_ != NULL); | |
629 | return this->plt_; | |
630 | } | |
631 | ||
e5d5f5ed AM |
632 | // Get the IPLT section. |
633 | const Output_data_plt_powerpc<size, big_endian>* | |
634 | iplt_section() const | |
635 | { | |
636 | gold_assert(this->iplt_ != NULL); | |
637 | return this->iplt_; | |
638 | } | |
639 | ||
cf43a2fe AM |
640 | // Get the .glink section. |
641 | const Output_data_glink<size, big_endian>* | |
642 | glink_section() const | |
643 | { | |
644 | gold_assert(this->glink_ != NULL); | |
645 | return this->glink_; | |
646 | } | |
647 | ||
9d5781f8 AM |
648 | bool has_glink() const |
649 | { return this->glink_ != NULL; } | |
650 | ||
cf43a2fe AM |
651 | // Get the GOT section. |
652 | const Output_data_got_powerpc<size, big_endian>* | |
653 | got_section() const | |
654 | { | |
655 | gold_assert(this->got_ != NULL); | |
656 | return this->got_; | |
657 | } | |
658 | ||
26a4e9cb AM |
659 | // Get the GOT section, creating it if necessary. |
660 | Output_data_got_powerpc<size, big_endian>* | |
661 | got_section(Symbol_table*, Layout*); | |
662 | ||
cf43a2fe AM |
663 | Object* |
664 | do_make_elf_object(const std::string&, Input_file*, off_t, | |
665 | const elfcpp::Ehdr<size, big_endian>&); | |
666 | ||
0e70b911 CC |
667 | // Return the number of entries in the GOT. |
668 | unsigned int | |
669 | got_entry_count() const | |
670 | { | |
671 | if (this->got_ == NULL) | |
672 | return 0; | |
673 | return this->got_size() / (size / 8); | |
674 | } | |
675 | ||
676 | // Return the number of entries in the PLT. | |
677 | unsigned int | |
678 | plt_entry_count() const; | |
679 | ||
680 | // Return the offset of the first non-reserved PLT entry. | |
681 | unsigned int | |
682 | first_plt_entry_offset() const; | |
683 | ||
684 | // Return the size of each PLT entry. | |
685 | unsigned int | |
686 | plt_entry_size() const; | |
687 | ||
e81fea4d AM |
688 | // Add any special sections for this symbol to the gc work list. |
689 | // For powerpc64, this adds the code section of a function | |
690 | // descriptor. | |
691 | void | |
692 | do_gc_mark_symbol(Symbol_table* symtab, Symbol* sym) const; | |
693 | ||
694 | // Handle target specific gc actions when adding a gc reference from | |
695 | // SRC_OBJ, SRC_SHNDX to a location specified by DST_OBJ, DST_SHNDX | |
696 | // and DST_OFF. For powerpc64, this adds a referenc to the code | |
697 | // section of a function descriptor. | |
698 | void | |
699 | do_gc_add_reference(Symbol_table* symtab, | |
700 | Object* src_obj, | |
701 | unsigned int src_shndx, | |
702 | Object* dst_obj, | |
703 | unsigned int dst_shndx, | |
704 | Address dst_off) const; | |
705 | ||
ec661b9d AM |
706 | typedef std::vector<Stub_table<size, big_endian>*> Stub_tables; |
707 | const Stub_tables& | |
708 | stub_tables() const | |
709 | { return this->stub_tables_; } | |
710 | ||
711 | const Output_data_brlt_powerpc<size, big_endian>* | |
712 | brlt_section() const | |
713 | { return this->brlt_section_; } | |
714 | ||
715 | void | |
716 | add_branch_lookup_table(Address to) | |
717 | { | |
718 | unsigned int off = this->branch_lookup_table_.size() * (size / 8); | |
719 | this->branch_lookup_table_.insert(std::make_pair(to, off)); | |
720 | } | |
721 | ||
722 | Address | |
723 | find_branch_lookup_table(Address to) | |
724 | { | |
725 | typename Branch_lookup_table::const_iterator p | |
726 | = this->branch_lookup_table_.find(to); | |
727 | return p == this->branch_lookup_table_.end() ? invalid_address : p->second; | |
728 | } | |
729 | ||
730 | void | |
731 | write_branch_lookup_table(unsigned char *oview) | |
732 | { | |
733 | for (typename Branch_lookup_table::const_iterator p | |
734 | = this->branch_lookup_table_.begin(); | |
735 | p != this->branch_lookup_table_.end(); | |
736 | ++p) | |
737 | { | |
4d5effb9 | 738 | elfcpp::Swap<size, big_endian>::writeval(oview + p->second, p->first); |
ec661b9d AM |
739 | } |
740 | } | |
741 | ||
9e69ed50 AM |
742 | bool |
743 | plt_thread_safe() const | |
744 | { return this->plt_thread_safe_; } | |
745 | ||
42cacb20 DE |
746 | private: |
747 | ||
e3deeb9c AM |
748 | class Track_tls |
749 | { | |
750 | public: | |
751 | enum Tls_get_addr | |
752 | { | |
753 | NOT_EXPECTED = 0, | |
754 | EXPECTED = 1, | |
755 | SKIP = 2, | |
756 | NORMAL = 3 | |
757 | }; | |
758 | ||
759 | Track_tls() | |
760 | : tls_get_addr_(NOT_EXPECTED), | |
761 | relinfo_(NULL), relnum_(0), r_offset_(0) | |
762 | { } | |
763 | ||
764 | ~Track_tls() | |
765 | { | |
766 | if (this->tls_get_addr_ != NOT_EXPECTED) | |
767 | this->missing(); | |
768 | } | |
769 | ||
770 | void | |
771 | missing(void) | |
772 | { | |
773 | if (this->relinfo_ != NULL) | |
774 | gold_error_at_location(this->relinfo_, this->relnum_, this->r_offset_, | |
775 | _("missing expected __tls_get_addr call")); | |
776 | } | |
777 | ||
778 | void | |
779 | expect_tls_get_addr_call( | |
780 | const Relocate_info<size, big_endian>* relinfo, | |
781 | size_t relnum, | |
782 | Address r_offset) | |
783 | { | |
784 | this->tls_get_addr_ = EXPECTED; | |
785 | this->relinfo_ = relinfo; | |
786 | this->relnum_ = relnum; | |
787 | this->r_offset_ = r_offset; | |
788 | } | |
789 | ||
790 | void | |
791 | expect_tls_get_addr_call() | |
792 | { this->tls_get_addr_ = EXPECTED; } | |
793 | ||
794 | void | |
795 | skip_next_tls_get_addr_call() | |
796 | {this->tls_get_addr_ = SKIP; } | |
797 | ||
798 | Tls_get_addr | |
799 | maybe_skip_tls_get_addr_call(unsigned int r_type, const Symbol* gsym) | |
800 | { | |
801 | bool is_tls_call = ((r_type == elfcpp::R_POWERPC_REL24 | |
802 | || r_type == elfcpp::R_PPC_PLTREL24) | |
803 | && gsym != NULL | |
804 | && strcmp(gsym->name(), "__tls_get_addr") == 0); | |
805 | Tls_get_addr last_tls = this->tls_get_addr_; | |
806 | this->tls_get_addr_ = NOT_EXPECTED; | |
807 | if (is_tls_call && last_tls != EXPECTED) | |
808 | return last_tls; | |
809 | else if (!is_tls_call && last_tls != NOT_EXPECTED) | |
810 | { | |
811 | this->missing(); | |
812 | return EXPECTED; | |
813 | } | |
814 | return NORMAL; | |
815 | } | |
816 | ||
817 | private: | |
818 | // What we're up to regarding calls to __tls_get_addr. | |
819 | // On powerpc, the branch and link insn making a call to | |
820 | // __tls_get_addr is marked with a relocation, R_PPC64_TLSGD, | |
821 | // R_PPC64_TLSLD, R_PPC_TLSGD or R_PPC_TLSLD, in addition to the | |
822 | // usual R_POWERPC_REL24 or R_PPC_PLTREL25 relocation on a call. | |
823 | // The marker relocation always comes first, and has the same | |
824 | // symbol as the reloc on the insn setting up the __tls_get_addr | |
825 | // argument. This ties the arg setup insn with the call insn, | |
826 | // allowing ld to safely optimize away the call. We check that | |
827 | // every call to __tls_get_addr has a marker relocation, and that | |
828 | // every marker relocation is on a call to __tls_get_addr. | |
829 | Tls_get_addr tls_get_addr_; | |
830 | // Info about the last reloc for error message. | |
831 | const Relocate_info<size, big_endian>* relinfo_; | |
832 | size_t relnum_; | |
833 | Address r_offset_; | |
834 | }; | |
835 | ||
42cacb20 | 836 | // The class which scans relocations. |
e3deeb9c | 837 | class Scan : protected Track_tls |
42cacb20 DE |
838 | { |
839 | public: | |
bfdfa4cd AM |
840 | typedef typename elfcpp::Elf_types<size>::Elf_Addr Address; |
841 | ||
42cacb20 | 842 | Scan() |
e3deeb9c | 843 | : Track_tls(), issued_non_pic_error_(false) |
42cacb20 DE |
844 | { } |
845 | ||
95a2c8d6 RS |
846 | static inline int |
847 | get_reference_flags(unsigned int r_type); | |
848 | ||
42cacb20 | 849 | inline void |
ad0f2072 | 850 | local(Symbol_table* symtab, Layout* layout, Target_powerpc* target, |
6fa2a40b | 851 | Sized_relobj_file<size, big_endian>* object, |
42cacb20 DE |
852 | unsigned int data_shndx, |
853 | Output_section* output_section, | |
854 | const elfcpp::Rela<size, big_endian>& reloc, unsigned int r_type, | |
bfdfa4cd AM |
855 | const elfcpp::Sym<size, big_endian>& lsym, |
856 | bool is_discarded); | |
42cacb20 DE |
857 | |
858 | inline void | |
ad0f2072 | 859 | global(Symbol_table* symtab, Layout* layout, Target_powerpc* target, |
6fa2a40b | 860 | Sized_relobj_file<size, big_endian>* object, |
42cacb20 DE |
861 | unsigned int data_shndx, |
862 | Output_section* output_section, | |
863 | const elfcpp::Rela<size, big_endian>& reloc, unsigned int r_type, | |
864 | Symbol* gsym); | |
865 | ||
21bb3914 ST |
866 | inline bool |
867 | local_reloc_may_be_function_pointer(Symbol_table* , Layout* , | |
868 | Target_powerpc* , | |
2e702c99 | 869 | Sized_relobj_file<size, big_endian>* , |
21bb3914 | 870 | unsigned int , |
2e702c99 RM |
871 | Output_section* , |
872 | const elfcpp::Rela<size, big_endian>& , | |
4d9aa155 | 873 | unsigned int r_type, |
2e702c99 | 874 | const elfcpp::Sym<size, big_endian>&) |
4d9aa155 AM |
875 | { |
876 | // PowerPC64 .opd is not folded, so any identical function text | |
877 | // may be folded and we'll still keep function addresses distinct. | |
878 | // That means no reloc is of concern here. | |
879 | if (size == 64) | |
880 | return false; | |
881 | // For 32-bit, conservatively assume anything but calls to | |
882 | // function code might be taking the address of the function. | |
883 | return !is_branch_reloc(r_type); | |
884 | } | |
21bb3914 ST |
885 | |
886 | inline bool | |
887 | global_reloc_may_be_function_pointer(Symbol_table* , Layout* , | |
888 | Target_powerpc* , | |
2e702c99 RM |
889 | Sized_relobj_file<size, big_endian>* , |
890 | unsigned int , | |
891 | Output_section* , | |
4d9aa155 AM |
892 | const elfcpp::Rela<size, big_endian>& , |
893 | unsigned int r_type, | |
894 | Symbol*) | |
895 | { | |
896 | // As above. | |
897 | if (size == 64) | |
898 | return false; | |
899 | return !is_branch_reloc(r_type); | |
900 | } | |
21bb3914 | 901 | |
b3ccdeb5 AM |
902 | static bool |
903 | reloc_needs_plt_for_ifunc(Sized_relobj_file<size, big_endian>* object, | |
904 | unsigned int r_type, bool report_err); | |
905 | ||
42cacb20 DE |
906 | private: |
907 | static void | |
6fa2a40b | 908 | unsupported_reloc_local(Sized_relobj_file<size, big_endian>*, |
42cacb20 DE |
909 | unsigned int r_type); |
910 | ||
911 | static void | |
6fa2a40b | 912 | unsupported_reloc_global(Sized_relobj_file<size, big_endian>*, |
42cacb20 DE |
913 | unsigned int r_type, Symbol*); |
914 | ||
915 | static void | |
916 | generate_tls_call(Symbol_table* symtab, Layout* layout, | |
917 | Target_powerpc* target); | |
918 | ||
919 | void | |
920 | check_non_pic(Relobj*, unsigned int r_type); | |
921 | ||
922 | // Whether we have issued an error about a non-PIC compilation. | |
923 | bool issued_non_pic_error_; | |
924 | }; | |
925 | ||
3ea0a085 | 926 | Address |
6c77229c AM |
927 | symval_for_branch(const Symbol_table* symtab, Address value, |
928 | const Sized_symbol<size>* gsym, | |
3ea0a085 AM |
929 | Powerpc_relobj<size, big_endian>* object, |
930 | unsigned int *dest_shndx); | |
931 | ||
42cacb20 | 932 | // The class which implements relocation. |
e3deeb9c | 933 | class Relocate : protected Track_tls |
42cacb20 DE |
934 | { |
935 | public: | |
dd93cd0a AM |
936 | // Use 'at' branch hints when true, 'y' when false. |
937 | // FIXME maybe: set this with an option. | |
938 | static const bool is_isa_v2 = true; | |
939 | ||
dd93cd0a | 940 | Relocate() |
e3deeb9c | 941 | : Track_tls() |
dd93cd0a AM |
942 | { } |
943 | ||
42cacb20 DE |
944 | // Do a relocation. Return false if the caller should not issue |
945 | // any warnings about this relocation. | |
946 | inline bool | |
947 | relocate(const Relocate_info<size, big_endian>*, Target_powerpc*, | |
031cdbed ILT |
948 | Output_section*, size_t relnum, |
949 | const elfcpp::Rela<size, big_endian>&, | |
42cacb20 DE |
950 | unsigned int r_type, const Sized_symbol<size>*, |
951 | const Symbol_value<size>*, | |
952 | unsigned char*, | |
953 | typename elfcpp::Elf_types<size>::Elf_Addr, | |
954 | section_size_type); | |
42cacb20 DE |
955 | }; |
956 | ||
168a4726 AM |
957 | class Relocate_comdat_behavior |
958 | { | |
959 | public: | |
960 | // Decide what the linker should do for relocations that refer to | |
961 | // discarded comdat sections. | |
962 | inline Comdat_behavior | |
963 | get(const char* name) | |
964 | { | |
965 | gold::Default_comdat_behavior default_behavior; | |
966 | Comdat_behavior ret = default_behavior.get(name); | |
967 | if (ret == CB_WARNING) | |
968 | { | |
969 | if (size == 32 | |
970 | && (strcmp(name, ".fixup") == 0 | |
971 | || strcmp(name, ".got2") == 0)) | |
972 | ret = CB_IGNORE; | |
973 | if (size == 64 | |
974 | && (strcmp(name, ".opd") == 0 | |
975 | || strcmp(name, ".toc") == 0 | |
976 | || strcmp(name, ".toc1") == 0)) | |
977 | ret = CB_IGNORE; | |
978 | } | |
979 | return ret; | |
980 | } | |
981 | }; | |
982 | ||
42cacb20 DE |
983 | // A class which returns the size required for a relocation type, |
984 | // used while scanning relocs during a relocatable link. | |
985 | class Relocatable_size_for_reloc | |
986 | { | |
987 | public: | |
988 | unsigned int | |
cf43a2fe AM |
989 | get_size_for_reloc(unsigned int, Relobj*) |
990 | { | |
991 | gold_unreachable(); | |
992 | return 0; | |
993 | } | |
42cacb20 DE |
994 | }; |
995 | ||
dd93cd0a AM |
996 | // Optimize the TLS relocation type based on what we know about the |
997 | // symbol. IS_FINAL is true if the final address of this symbol is | |
998 | // known at link time. | |
999 | ||
1000 | tls::Tls_optimization | |
1001 | optimize_tls_gd(bool is_final) | |
1002 | { | |
1003 | // If we are generating a shared library, then we can't do anything | |
1004 | // in the linker. | |
1005 | if (parameters->options().shared()) | |
1006 | return tls::TLSOPT_NONE; | |
1007 | ||
1008 | if (!is_final) | |
1009 | return tls::TLSOPT_TO_IE; | |
1010 | return tls::TLSOPT_TO_LE; | |
1011 | } | |
1012 | ||
1013 | tls::Tls_optimization | |
1014 | optimize_tls_ld() | |
1015 | { | |
1016 | if (parameters->options().shared()) | |
1017 | return tls::TLSOPT_NONE; | |
1018 | ||
1019 | return tls::TLSOPT_TO_LE; | |
1020 | } | |
1021 | ||
1022 | tls::Tls_optimization | |
1023 | optimize_tls_ie(bool is_final) | |
1024 | { | |
1025 | if (!is_final || parameters->options().shared()) | |
1026 | return tls::TLSOPT_NONE; | |
1027 | ||
1028 | return tls::TLSOPT_TO_LE; | |
1029 | } | |
cf43a2fe | 1030 | |
cf43a2fe AM |
1031 | // Create glink. |
1032 | void | |
1033 | make_glink_section(Layout*); | |
42cacb20 | 1034 | |
cf43a2fe AM |
1035 | // Create the PLT section. |
1036 | void | |
40b469d7 | 1037 | make_plt_section(Symbol_table*, Layout*); |
42cacb20 | 1038 | |
e5d5f5ed | 1039 | void |
40b469d7 | 1040 | make_iplt_section(Symbol_table*, Layout*); |
e5d5f5ed | 1041 | |
ec661b9d AM |
1042 | void |
1043 | make_brlt_section(Layout*); | |
1044 | ||
42cacb20 DE |
1045 | // Create a PLT entry for a global symbol. |
1046 | void | |
ec661b9d | 1047 | make_plt_entry(Symbol_table*, Layout*, Symbol*); |
e5d5f5ed AM |
1048 | |
1049 | // Create a PLT entry for a local IFUNC symbol. | |
1050 | void | |
40b469d7 | 1051 | make_local_ifunc_plt_entry(Symbol_table*, Layout*, |
ec661b9d AM |
1052 | Sized_relobj_file<size, big_endian>*, |
1053 | unsigned int); | |
1054 | ||
42cacb20 | 1055 | |
dd93cd0a AM |
1056 | // Create a GOT entry for local dynamic __tls_get_addr. |
1057 | unsigned int | |
1058 | tlsld_got_offset(Symbol_table* symtab, Layout* layout, | |
1059 | Sized_relobj_file<size, big_endian>* object); | |
1060 | ||
42cacb20 | 1061 | unsigned int |
dd93cd0a AM |
1062 | tlsld_got_offset() const |
1063 | { | |
1064 | return this->tlsld_got_offset_; | |
1065 | } | |
42cacb20 | 1066 | |
42cacb20 DE |
1067 | // Get the dynamic reloc section, creating it if necessary. |
1068 | Reloc_section* | |
1069 | rela_dyn_section(Layout*); | |
1070 | ||
b3ccdeb5 AM |
1071 | // Similarly, but for ifunc symbols get the one for ifunc. |
1072 | Reloc_section* | |
1073 | rela_dyn_section(Symbol_table*, Layout*, bool for_ifunc); | |
1074 | ||
42cacb20 DE |
1075 | // Copy a relocation against a global symbol. |
1076 | void | |
ef9beddf | 1077 | copy_reloc(Symbol_table* symtab, Layout* layout, |
2e702c99 | 1078 | Sized_relobj_file<size, big_endian>* object, |
42cacb20 DE |
1079 | unsigned int shndx, Output_section* output_section, |
1080 | Symbol* sym, const elfcpp::Rela<size, big_endian>& reloc) | |
1081 | { | |
1082 | this->copy_relocs_.copy_reloc(symtab, layout, | |
1083 | symtab->get_sized_symbol<size>(sym), | |
1084 | object, shndx, output_section, | |
1085 | reloc, this->rela_dyn_section(layout)); | |
1086 | } | |
1087 | ||
0cfdc767 | 1088 | // Look over all the input sections, deciding where to place stubs. |
ec661b9d AM |
1089 | void |
1090 | group_sections(Layout*, const Task*); | |
1091 | ||
1092 | // Sort output sections by address. | |
1093 | struct Sort_sections | |
1094 | { | |
1095 | bool | |
1096 | operator()(const Output_section* sec1, const Output_section* sec2) | |
1097 | { return sec1->address() < sec2->address(); } | |
1098 | }; | |
1099 | ||
1100 | class Branch_info | |
1101 | { | |
1102 | public: | |
1103 | Branch_info(Powerpc_relobj<size, big_endian>* ppc_object, | |
1104 | unsigned int data_shndx, | |
1105 | Address r_offset, | |
1106 | unsigned int r_type, | |
1107 | unsigned int r_sym, | |
1108 | Address addend) | |
1109 | : object_(ppc_object), shndx_(data_shndx), offset_(r_offset), | |
1110 | r_type_(r_type), r_sym_(r_sym), addend_(addend) | |
1111 | { } | |
1112 | ||
1113 | ~Branch_info() | |
1114 | { } | |
1115 | ||
1116 | // If this branch needs a plt call stub, or a long branch stub, make one. | |
1117 | void | |
1118 | make_stub(Stub_table<size, big_endian>*, | |
1119 | Stub_table<size, big_endian>*, | |
1120 | Symbol_table*) const; | |
1121 | ||
1122 | private: | |
1123 | // The branch location.. | |
1124 | Powerpc_relobj<size, big_endian>* object_; | |
1125 | unsigned int shndx_; | |
1126 | Address offset_; | |
1127 | // ..and the branch type and destination. | |
1128 | unsigned int r_type_; | |
1129 | unsigned int r_sym_; | |
1130 | Address addend_; | |
1131 | }; | |
1132 | ||
42cacb20 DE |
1133 | // Information about this specific target which we pass to the |
1134 | // general Target structure. | |
1135 | static Target::Target_info powerpc_info; | |
1136 | ||
1137 | // The types of GOT entries needed for this platform. | |
0e70b911 CC |
1138 | // These values are exposed to the ABI in an incremental link. |
1139 | // Do not renumber existing values without changing the version | |
1140 | // number of the .gnu_incremental_inputs section. | |
42cacb20 DE |
1141 | enum Got_type |
1142 | { | |
dd93cd0a AM |
1143 | GOT_TYPE_STANDARD, |
1144 | GOT_TYPE_TLSGD, // double entry for @got@tlsgd | |
1145 | GOT_TYPE_DTPREL, // entry for @got@dtprel | |
1146 | GOT_TYPE_TPREL // entry for @got@tprel | |
42cacb20 DE |
1147 | }; |
1148 | ||
ec661b9d | 1149 | // The GOT section. |
cf43a2fe | 1150 | Output_data_got_powerpc<size, big_endian>* got_; |
b3ccdeb5 AM |
1151 | // The PLT section. This is a container for a table of addresses, |
1152 | // and their relocations. Each address in the PLT has a dynamic | |
1153 | // relocation (R_*_JMP_SLOT) and each address will have a | |
1154 | // corresponding entry in .glink for lazy resolution of the PLT. | |
1155 | // ppc32 initialises the PLT to point at the .glink entry, while | |
1156 | // ppc64 leaves this to ld.so. To make a call via the PLT, the | |
1157 | // linker adds a stub that loads the PLT entry into ctr then | |
1158 | // branches to ctr. There may be more than one stub for each PLT | |
1159 | // entry. DT_JMPREL points at the first PLT dynamic relocation and | |
1160 | // DT_PLTRELSZ gives the total size of PLT dynamic relocations. | |
42cacb20 | 1161 | Output_data_plt_powerpc<size, big_endian>* plt_; |
b3ccdeb5 AM |
1162 | // The IPLT section. Like plt_, this is a container for a table of |
1163 | // addresses and their relocations, specifically for STT_GNU_IFUNC | |
1164 | // functions that resolve locally (STT_GNU_IFUNC functions that | |
1165 | // don't resolve locally go in PLT). Unlike plt_, these have no | |
1166 | // entry in .glink for lazy resolution, and the relocation section | |
1167 | // does not have a 1-1 correspondence with IPLT addresses. In fact, | |
1168 | // the relocation section may contain relocations against | |
1169 | // STT_GNU_IFUNC symbols at locations outside of IPLT. The | |
1170 | // relocation section will appear at the end of other dynamic | |
1171 | // relocations, so that ld.so applies these relocations after other | |
1172 | // dynamic relocations. In a static executable, the relocation | |
1173 | // section is emitted and marked with __rela_iplt_start and | |
1174 | // __rela_iplt_end symbols. | |
e5d5f5ed | 1175 | Output_data_plt_powerpc<size, big_endian>* iplt_; |
ec661b9d AM |
1176 | // Section holding long branch destinations. |
1177 | Output_data_brlt_powerpc<size, big_endian>* brlt_section_; | |
1178 | // The .glink section. | |
cf43a2fe | 1179 | Output_data_glink<size, big_endian>* glink_; |
ec661b9d | 1180 | // The dynamic reloc section. |
42cacb20 DE |
1181 | Reloc_section* rela_dyn_; |
1182 | // Relocs saved to avoid a COPY reloc. | |
1183 | Copy_relocs<elfcpp::SHT_RELA, size, big_endian> copy_relocs_; | |
dd93cd0a AM |
1184 | // Offset of the GOT entry for local dynamic __tls_get_addr calls. |
1185 | unsigned int tlsld_got_offset_; | |
ec661b9d AM |
1186 | |
1187 | Stub_tables stub_tables_; | |
1188 | typedef Unordered_map<Address, unsigned int> Branch_lookup_table; | |
1189 | Branch_lookup_table branch_lookup_table_; | |
1190 | ||
1191 | typedef std::vector<Branch_info> Branches; | |
1192 | Branches branch_info_; | |
9e69ed50 AM |
1193 | |
1194 | bool plt_thread_safe_; | |
42cacb20 DE |
1195 | }; |
1196 | ||
1197 | template<> | |
1198 | Target::Target_info Target_powerpc<32, true>::powerpc_info = | |
1199 | { | |
1200 | 32, // size | |
1201 | true, // is_big_endian | |
1202 | elfcpp::EM_PPC, // machine_code | |
1203 | false, // has_make_symbol | |
1204 | false, // has_resolve | |
1205 | false, // has_code_fill | |
1206 | true, // is_default_stack_executable | |
b3ce541e | 1207 | false, // can_icf_inline_merge_sections |
42cacb20 DE |
1208 | '\0', // wrap_char |
1209 | "/usr/lib/ld.so.1", // dynamic_linker | |
1210 | 0x10000000, // default_text_segment_address | |
1211 | 64 * 1024, // abi_pagesize (overridable by -z max-page-size) | |
8a5e3e08 | 1212 | 4 * 1024, // common_pagesize (overridable by -z common-page-size) |
c9269dff AM |
1213 | false, // isolate_execinstr |
1214 | 0, // rosegment_gap | |
8a5e3e08 ILT |
1215 | elfcpp::SHN_UNDEF, // small_common_shndx |
1216 | elfcpp::SHN_UNDEF, // large_common_shndx | |
1217 | 0, // small_common_section_flags | |
05a352e6 DK |
1218 | 0, // large_common_section_flags |
1219 | NULL, // attributes_section | |
a67858e0 CC |
1220 | NULL, // attributes_vendor |
1221 | "_start" // entry_symbol_name | |
42cacb20 DE |
1222 | }; |
1223 | ||
1224 | template<> | |
1225 | Target::Target_info Target_powerpc<32, false>::powerpc_info = | |
1226 | { | |
1227 | 32, // size | |
1228 | false, // is_big_endian | |
1229 | elfcpp::EM_PPC, // machine_code | |
1230 | false, // has_make_symbol | |
1231 | false, // has_resolve | |
1232 | false, // has_code_fill | |
1233 | true, // is_default_stack_executable | |
b3ce541e | 1234 | false, // can_icf_inline_merge_sections |
42cacb20 DE |
1235 | '\0', // wrap_char |
1236 | "/usr/lib/ld.so.1", // dynamic_linker | |
1237 | 0x10000000, // default_text_segment_address | |
1238 | 64 * 1024, // abi_pagesize (overridable by -z max-page-size) | |
8a5e3e08 | 1239 | 4 * 1024, // common_pagesize (overridable by -z common-page-size) |
c9269dff AM |
1240 | false, // isolate_execinstr |
1241 | 0, // rosegment_gap | |
8a5e3e08 ILT |
1242 | elfcpp::SHN_UNDEF, // small_common_shndx |
1243 | elfcpp::SHN_UNDEF, // large_common_shndx | |
1244 | 0, // small_common_section_flags | |
05a352e6 DK |
1245 | 0, // large_common_section_flags |
1246 | NULL, // attributes_section | |
a67858e0 CC |
1247 | NULL, // attributes_vendor |
1248 | "_start" // entry_symbol_name | |
42cacb20 DE |
1249 | }; |
1250 | ||
1251 | template<> | |
1252 | Target::Target_info Target_powerpc<64, true>::powerpc_info = | |
1253 | { | |
1254 | 64, // size | |
1255 | true, // is_big_endian | |
1256 | elfcpp::EM_PPC64, // machine_code | |
1257 | false, // has_make_symbol | |
1258 | false, // has_resolve | |
1259 | false, // has_code_fill | |
1260 | true, // is_default_stack_executable | |
b3ce541e | 1261 | false, // can_icf_inline_merge_sections |
42cacb20 DE |
1262 | '\0', // wrap_char |
1263 | "/usr/lib/ld.so.1", // dynamic_linker | |
1264 | 0x10000000, // default_text_segment_address | |
1265 | 64 * 1024, // abi_pagesize (overridable by -z max-page-size) | |
dd93cd0a | 1266 | 4 * 1024, // common_pagesize (overridable by -z common-page-size) |
c9269dff AM |
1267 | false, // isolate_execinstr |
1268 | 0, // rosegment_gap | |
8a5e3e08 ILT |
1269 | elfcpp::SHN_UNDEF, // small_common_shndx |
1270 | elfcpp::SHN_UNDEF, // large_common_shndx | |
1271 | 0, // small_common_section_flags | |
05a352e6 DK |
1272 | 0, // large_common_section_flags |
1273 | NULL, // attributes_section | |
a67858e0 CC |
1274 | NULL, // attributes_vendor |
1275 | "_start" // entry_symbol_name | |
42cacb20 DE |
1276 | }; |
1277 | ||
1278 | template<> | |
1279 | Target::Target_info Target_powerpc<64, false>::powerpc_info = | |
1280 | { | |
1281 | 64, // size | |
1282 | false, // is_big_endian | |
1283 | elfcpp::EM_PPC64, // machine_code | |
1284 | false, // has_make_symbol | |
1285 | false, // has_resolve | |
1286 | false, // has_code_fill | |
1287 | true, // is_default_stack_executable | |
b3ce541e | 1288 | false, // can_icf_inline_merge_sections |
42cacb20 DE |
1289 | '\0', // wrap_char |
1290 | "/usr/lib/ld.so.1", // dynamic_linker | |
1291 | 0x10000000, // default_text_segment_address | |
1292 | 64 * 1024, // abi_pagesize (overridable by -z max-page-size) | |
dd93cd0a | 1293 | 4 * 1024, // common_pagesize (overridable by -z common-page-size) |
c9269dff AM |
1294 | false, // isolate_execinstr |
1295 | 0, // rosegment_gap | |
8a5e3e08 ILT |
1296 | elfcpp::SHN_UNDEF, // small_common_shndx |
1297 | elfcpp::SHN_UNDEF, // large_common_shndx | |
1298 | 0, // small_common_section_flags | |
05a352e6 DK |
1299 | 0, // large_common_section_flags |
1300 | NULL, // attributes_section | |
a67858e0 CC |
1301 | NULL, // attributes_vendor |
1302 | "_start" // entry_symbol_name | |
42cacb20 DE |
1303 | }; |
1304 | ||
dd93cd0a AM |
1305 | inline bool |
1306 | is_branch_reloc(unsigned int r_type) | |
1307 | { | |
1308 | return (r_type == elfcpp::R_POWERPC_REL24 | |
1309 | || r_type == elfcpp::R_PPC_PLTREL24 | |
1310 | || r_type == elfcpp::R_PPC_LOCAL24PC | |
1311 | || r_type == elfcpp::R_POWERPC_REL14 | |
1312 | || r_type == elfcpp::R_POWERPC_REL14_BRTAKEN | |
1313 | || r_type == elfcpp::R_POWERPC_REL14_BRNTAKEN | |
1314 | || r_type == elfcpp::R_POWERPC_ADDR24 | |
1315 | || r_type == elfcpp::R_POWERPC_ADDR14 | |
1316 | || r_type == elfcpp::R_POWERPC_ADDR14_BRTAKEN | |
1317 | || r_type == elfcpp::R_POWERPC_ADDR14_BRNTAKEN); | |
1318 | } | |
1319 | ||
1320 | // If INSN is an opcode that may be used with an @tls operand, return | |
1321 | // the transformed insn for TLS optimisation, otherwise return 0. If | |
1322 | // REG is non-zero only match an insn with RB or RA equal to REG. | |
1323 | uint32_t | |
1324 | at_tls_transform(uint32_t insn, unsigned int reg) | |
1325 | { | |
1326 | if ((insn & (0x3f << 26)) != 31 << 26) | |
1327 | return 0; | |
1328 | ||
1329 | unsigned int rtra; | |
1330 | if (reg == 0 || ((insn >> 11) & 0x1f) == reg) | |
1331 | rtra = insn & ((1 << 26) - (1 << 16)); | |
1332 | else if (((insn >> 16) & 0x1f) == reg) | |
1333 | rtra = (insn & (0x1f << 21)) | ((insn & (0x1f << 11)) << 5); | |
1334 | else | |
1335 | return 0; | |
1336 | ||
1337 | if ((insn & (0x3ff << 1)) == 266 << 1) | |
1338 | // add -> addi | |
1339 | insn = 14 << 26; | |
1340 | else if ((insn & (0x1f << 1)) == 23 << 1 | |
1341 | && ((insn & (0x1f << 6)) < 14 << 6 | |
1342 | || ((insn & (0x1f << 6)) >= 16 << 6 | |
1343 | && (insn & (0x1f << 6)) < 24 << 6))) | |
1344 | // load and store indexed -> dform | |
1345 | insn = (32 | ((insn >> 6) & 0x1f)) << 26; | |
1346 | else if ((insn & (((0x1a << 5) | 0x1f) << 1)) == 21 << 1) | |
1347 | // ldx, ldux, stdx, stdux -> ld, ldu, std, stdu | |
1348 | insn = ((58 | ((insn >> 6) & 4)) << 26) | ((insn >> 6) & 1); | |
1349 | else if ((insn & (((0x1f << 5) | 0x1f) << 1)) == 341 << 1) | |
1350 | // lwax -> lwa | |
1351 | insn = (58 << 26) | 2; | |
1352 | else | |
1353 | return 0; | |
1354 | insn |= rtra; | |
1355 | return insn; | |
1356 | } | |
1357 | ||
1358 | // Modified version of symtab.h class Symbol member | |
1359 | // Given a direct absolute or pc-relative static relocation against | |
1360 | // the global symbol, this function returns whether a dynamic relocation | |
1361 | // is needed. | |
1362 | ||
1363 | template<int size> | |
1364 | bool | |
1365 | needs_dynamic_reloc(const Symbol* gsym, int flags) | |
1366 | { | |
1367 | // No dynamic relocations in a static link! | |
1368 | if (parameters->doing_static_link()) | |
1369 | return false; | |
1370 | ||
1371 | // A reference to an undefined symbol from an executable should be | |
1372 | // statically resolved to 0, and does not need a dynamic relocation. | |
1373 | // This matches gnu ld behavior. | |
1374 | if (gsym->is_undefined() && !parameters->options().shared()) | |
1375 | return false; | |
1376 | ||
1377 | // A reference to an absolute symbol does not need a dynamic relocation. | |
1378 | if (gsym->is_absolute()) | |
1379 | return false; | |
1380 | ||
1381 | // An absolute reference within a position-independent output file | |
1382 | // will need a dynamic relocation. | |
1383 | if ((flags & Symbol::ABSOLUTE_REF) | |
1384 | && parameters->options().output_is_position_independent()) | |
1385 | return true; | |
1386 | ||
1387 | // A function call that can branch to a local PLT entry does not need | |
1388 | // a dynamic relocation. | |
1389 | if ((flags & Symbol::FUNCTION_CALL) && gsym->has_plt_offset()) | |
1390 | return false; | |
1391 | ||
1392 | // A reference to any PLT entry in a non-position-independent executable | |
1393 | // does not need a dynamic relocation. | |
1394 | // Except due to having function descriptors on powerpc64 we don't define | |
1395 | // functions to their plt code in an executable, so this doesn't apply. | |
1396 | if (size == 32 | |
1397 | && !parameters->options().output_is_position_independent() | |
1398 | && gsym->has_plt_offset()) | |
1399 | return false; | |
1400 | ||
1401 | // A reference to a symbol defined in a dynamic object or to a | |
1402 | // symbol that is preemptible will need a dynamic relocation. | |
1403 | if (gsym->is_from_dynobj() | |
1404 | || gsym->is_undefined() | |
1405 | || gsym->is_preemptible()) | |
1406 | return true; | |
1407 | ||
1408 | // For all other cases, return FALSE. | |
1409 | return false; | |
1410 | } | |
1411 | ||
1412 | // Modified version of symtab.h class Symbol member | |
1413 | // Whether we should use the PLT offset associated with a symbol for | |
1414 | // a relocation. FLAGS is a set of Reference_flags. | |
1415 | ||
1416 | template<int size> | |
1417 | bool | |
1418 | use_plt_offset(const Symbol* gsym, int flags) | |
1419 | { | |
1420 | // If the symbol doesn't have a PLT offset, then naturally we | |
1421 | // don't want to use it. | |
1422 | if (!gsym->has_plt_offset()) | |
1423 | return false; | |
1424 | ||
1425 | // For a STT_GNU_IFUNC symbol we always have to use the PLT entry. | |
1426 | if (gsym->type() == elfcpp::STT_GNU_IFUNC) | |
1427 | return true; | |
1428 | ||
1429 | // If we are going to generate a dynamic relocation, then we will | |
1430 | // wind up using that, so no need to use the PLT entry. | |
1431 | if (needs_dynamic_reloc<size>(gsym, flags)) | |
1432 | return false; | |
1433 | ||
1434 | // If the symbol is from a dynamic object, we need to use the PLT | |
1435 | // entry. | |
1436 | if (gsym->is_from_dynobj()) | |
1437 | return true; | |
1438 | ||
9e69ed50 | 1439 | // If we are generating a shared object, and this symbol is |
dd93cd0a AM |
1440 | // undefined or preemptible, we need to use the PLT entry. |
1441 | if (parameters->options().shared() | |
1442 | && (gsym->is_undefined() || gsym->is_preemptible())) | |
1443 | return true; | |
1444 | ||
9e69ed50 | 1445 | // If this is a call to a weak undefined symbol, we need to use |
dd93cd0a AM |
1446 | // the PLT entry; the symbol may be defined by a library loaded |
1447 | // at runtime. | |
1448 | if ((flags & Symbol::FUNCTION_CALL) && gsym->is_weak_undefined()) | |
1449 | return true; | |
1450 | ||
1451 | // Otherwise we can use the regular definition. | |
1452 | return false; | |
1453 | } | |
1454 | ||
42cacb20 DE |
1455 | template<int size, bool big_endian> |
1456 | class Powerpc_relocate_functions | |
1457 | { | |
dd93cd0a | 1458 | public: |
f4baf0d4 | 1459 | enum Overflow_check |
dd93cd0a | 1460 | { |
f4baf0d4 AM |
1461 | CHECK_NONE, |
1462 | CHECK_SIGNED, | |
1463 | CHECK_BITFIELD | |
dd93cd0a AM |
1464 | }; |
1465 | ||
f4baf0d4 | 1466 | enum Status |
dd93cd0a | 1467 | { |
f4baf0d4 AM |
1468 | STATUS_OK, |
1469 | STATUS_OVERFLOW | |
1470 | }; | |
dd93cd0a | 1471 | |
42cacb20 | 1472 | private: |
c9269dff | 1473 | typedef Powerpc_relocate_functions<size, big_endian> This; |
c9269dff AM |
1474 | typedef typename elfcpp::Elf_types<size>::Elf_Addr Address; |
1475 | ||
dd93cd0a AM |
1476 | template<int valsize> |
1477 | static inline bool | |
1478 | has_overflow_signed(Address value) | |
1479 | { | |
1480 | // limit = 1 << (valsize - 1) without shift count exceeding size of type | |
1481 | Address limit = static_cast<Address>(1) << ((valsize - 1) >> 1); | |
1482 | limit <<= ((valsize - 1) >> 1); | |
1483 | limit <<= ((valsize - 1) - 2 * ((valsize - 1) >> 1)); | |
1484 | return value + limit > (limit << 1) - 1; | |
1485 | } | |
1486 | ||
1487 | template<int valsize> | |
1488 | static inline bool | |
1489 | has_overflow_bitfield(Address value) | |
1490 | { | |
1491 | Address limit = static_cast<Address>(1) << ((valsize - 1) >> 1); | |
1492 | limit <<= ((valsize - 1) >> 1); | |
1493 | limit <<= ((valsize - 1) - 2 * ((valsize - 1) >> 1)); | |
1494 | return value > (limit << 1) - 1 && value + limit > (limit << 1) - 1; | |
1495 | } | |
1496 | ||
1497 | template<int valsize> | |
f4baf0d4 AM |
1498 | static inline Status |
1499 | overflowed(Address value, Overflow_check overflow) | |
dd93cd0a | 1500 | { |
f4baf0d4 | 1501 | if (overflow == CHECK_SIGNED) |
dd93cd0a AM |
1502 | { |
1503 | if (has_overflow_signed<valsize>(value)) | |
f4baf0d4 | 1504 | return STATUS_OVERFLOW; |
dd93cd0a | 1505 | } |
f4baf0d4 | 1506 | else if (overflow == CHECK_BITFIELD) |
dd93cd0a AM |
1507 | { |
1508 | if (has_overflow_bitfield<valsize>(value)) | |
f4baf0d4 | 1509 | return STATUS_OVERFLOW; |
dd93cd0a | 1510 | } |
f4baf0d4 | 1511 | return STATUS_OK; |
dd93cd0a AM |
1512 | } |
1513 | ||
cf43a2fe | 1514 | // Do a simple RELA relocation |
42cacb20 | 1515 | template<int valsize> |
f4baf0d4 AM |
1516 | static inline Status |
1517 | rela(unsigned char* view, Address value, Overflow_check overflow) | |
dd93cd0a AM |
1518 | { |
1519 | typedef typename elfcpp::Swap<valsize, big_endian>::Valtype Valtype; | |
1520 | Valtype* wv = reinterpret_cast<Valtype*>(view); | |
1521 | elfcpp::Swap<valsize, big_endian>::writeval(wv, value); | |
1522 | return overflowed<valsize>(value, overflow); | |
1523 | } | |
1524 | ||
1525 | template<int valsize> | |
f4baf0d4 | 1526 | static inline Status |
42cacb20 DE |
1527 | rela(unsigned char* view, |
1528 | unsigned int right_shift, | |
c9269dff AM |
1529 | typename elfcpp::Valtype_base<valsize>::Valtype dst_mask, |
1530 | Address value, | |
f4baf0d4 | 1531 | Overflow_check overflow) |
42cacb20 DE |
1532 | { |
1533 | typedef typename elfcpp::Swap<valsize, big_endian>::Valtype Valtype; | |
1534 | Valtype* wv = reinterpret_cast<Valtype*>(view); | |
1535 | Valtype val = elfcpp::Swap<valsize, big_endian>::readval(wv); | |
dd93cd0a | 1536 | Valtype reloc = value >> right_shift; |
42cacb20 DE |
1537 | val &= ~dst_mask; |
1538 | reloc &= dst_mask; | |
42cacb20 | 1539 | elfcpp::Swap<valsize, big_endian>::writeval(wv, val | reloc); |
dd93cd0a | 1540 | return overflowed<valsize>(value >> right_shift, overflow); |
42cacb20 DE |
1541 | } |
1542 | ||
cf43a2fe | 1543 | // Do a simple RELA relocation, unaligned. |
42cacb20 | 1544 | template<int valsize> |
f4baf0d4 AM |
1545 | static inline Status |
1546 | rela_ua(unsigned char* view, Address value, Overflow_check overflow) | |
dd93cd0a AM |
1547 | { |
1548 | elfcpp::Swap_unaligned<valsize, big_endian>::writeval(view, value); | |
1549 | return overflowed<valsize>(value, overflow); | |
1550 | } | |
1551 | ||
1552 | template<int valsize> | |
f4baf0d4 | 1553 | static inline Status |
cf43a2fe AM |
1554 | rela_ua(unsigned char* view, |
1555 | unsigned int right_shift, | |
c9269dff AM |
1556 | typename elfcpp::Valtype_base<valsize>::Valtype dst_mask, |
1557 | Address value, | |
f4baf0d4 | 1558 | Overflow_check overflow) |
42cacb20 | 1559 | { |
c9269dff AM |
1560 | typedef typename elfcpp::Swap_unaligned<valsize, big_endian>::Valtype |
1561 | Valtype; | |
dd93cd0a AM |
1562 | Valtype val = elfcpp::Swap<valsize, big_endian>::readval(view); |
1563 | Valtype reloc = value >> right_shift; | |
42cacb20 DE |
1564 | val &= ~dst_mask; |
1565 | reloc &= dst_mask; | |
dd93cd0a AM |
1566 | elfcpp::Swap_unaligned<valsize, big_endian>::writeval(view, val | reloc); |
1567 | return overflowed<valsize>(value >> right_shift, overflow); | |
42cacb20 DE |
1568 | } |
1569 | ||
42cacb20 | 1570 | public: |
dd93cd0a | 1571 | // R_PPC64_ADDR64: (Symbol + Addend) |
42cacb20 | 1572 | static inline void |
dd93cd0a | 1573 | addr64(unsigned char* view, Address value) |
f4baf0d4 | 1574 | { This::template rela<64>(view, value, CHECK_NONE); } |
42cacb20 | 1575 | |
dd93cd0a | 1576 | // R_PPC64_UADDR64: (Symbol + Addend) unaligned |
42cacb20 | 1577 | static inline void |
dd93cd0a | 1578 | addr64_u(unsigned char* view, Address value) |
f4baf0d4 | 1579 | { This::template rela_ua<64>(view, value, CHECK_NONE); } |
dd93cd0a AM |
1580 | |
1581 | // R_POWERPC_ADDR32: (Symbol + Addend) | |
f4baf0d4 AM |
1582 | static inline Status |
1583 | addr32(unsigned char* view, Address value, Overflow_check overflow) | |
dd93cd0a AM |
1584 | { return This::template rela<32>(view, value, overflow); } |
1585 | ||
1586 | // R_POWERPC_UADDR32: (Symbol + Addend) unaligned | |
f4baf0d4 AM |
1587 | static inline Status |
1588 | addr32_u(unsigned char* view, Address value, Overflow_check overflow) | |
dd93cd0a AM |
1589 | { return This::template rela_ua<32>(view, value, overflow); } |
1590 | ||
1591 | // R_POWERPC_ADDR24: (Symbol + Addend) & 0x3fffffc | |
f4baf0d4 AM |
1592 | static inline Status |
1593 | addr24(unsigned char* view, Address value, Overflow_check overflow) | |
dd93cd0a | 1594 | { |
f4baf0d4 AM |
1595 | Status stat = This::template rela<32>(view, 0, 0x03fffffc, value, overflow); |
1596 | if (overflow != CHECK_NONE && (value & 3) != 0) | |
1597 | stat = STATUS_OVERFLOW; | |
dd93cd0a AM |
1598 | return stat; |
1599 | } | |
42cacb20 DE |
1600 | |
1601 | // R_POWERPC_ADDR16: (Symbol + Addend) & 0xffff | |
f4baf0d4 AM |
1602 | static inline Status |
1603 | addr16(unsigned char* view, Address value, Overflow_check overflow) | |
dd93cd0a | 1604 | { return This::template rela<16>(view, value, overflow); } |
42cacb20 | 1605 | |
dd93cd0a | 1606 | // R_POWERPC_ADDR16: (Symbol + Addend) & 0xffff, unaligned |
f4baf0d4 AM |
1607 | static inline Status |
1608 | addr16_u(unsigned char* view, Address value, Overflow_check overflow) | |
dd93cd0a | 1609 | { return This::template rela_ua<16>(view, value, overflow); } |
42cacb20 | 1610 | |
dd93cd0a | 1611 | // R_POWERPC_ADDR16_DS: (Symbol + Addend) & 0xfffc |
f4baf0d4 AM |
1612 | static inline Status |
1613 | addr16_ds(unsigned char* view, Address value, Overflow_check overflow) | |
dd93cd0a | 1614 | { |
f4baf0d4 AM |
1615 | Status stat = This::template rela<16>(view, 0, 0xfffc, value, overflow); |
1616 | if (overflow != CHECK_NONE && (value & 3) != 0) | |
1617 | stat = STATUS_OVERFLOW; | |
dd93cd0a AM |
1618 | return stat; |
1619 | } | |
42cacb20 | 1620 | |
42cacb20 DE |
1621 | // R_POWERPC_ADDR16_HI: ((Symbol + Addend) >> 16) & 0xffff |
1622 | static inline void | |
dd93cd0a | 1623 | addr16_hi(unsigned char* view, Address value) |
f4baf0d4 | 1624 | { This::template rela<16>(view, 16, 0xffff, value, CHECK_NONE); } |
42cacb20 | 1625 | |
c9269dff | 1626 | // R_POWERPC_ADDR16_HA: ((Symbol + Addend + 0x8000) >> 16) & 0xffff |
42cacb20 | 1627 | static inline void |
dd93cd0a AM |
1628 | addr16_ha(unsigned char* view, Address value) |
1629 | { This::addr16_hi(view, value + 0x8000); } | |
42cacb20 | 1630 | |
dd93cd0a | 1631 | // R_POWERPC_ADDR16_HIGHER: ((Symbol + Addend) >> 32) & 0xffff |
42cacb20 | 1632 | static inline void |
dd93cd0a | 1633 | addr16_hi2(unsigned char* view, Address value) |
f4baf0d4 | 1634 | { This::template rela<16>(view, 32, 0xffff, value, CHECK_NONE); } |
42cacb20 | 1635 | |
dd93cd0a | 1636 | // R_POWERPC_ADDR16_HIGHERA: ((Symbol + Addend + 0x8000) >> 32) & 0xffff |
42cacb20 | 1637 | static inline void |
dd93cd0a AM |
1638 | addr16_ha2(unsigned char* view, Address value) |
1639 | { This::addr16_hi2(view, value + 0x8000); } | |
42cacb20 | 1640 | |
dd93cd0a | 1641 | // R_POWERPC_ADDR16_HIGHEST: ((Symbol + Addend) >> 48) & 0xffff |
42cacb20 | 1642 | static inline void |
dd93cd0a | 1643 | addr16_hi3(unsigned char* view, Address value) |
f4baf0d4 | 1644 | { This::template rela<16>(view, 48, 0xffff, value, CHECK_NONE); } |
42cacb20 | 1645 | |
dd93cd0a | 1646 | // R_POWERPC_ADDR16_HIGHESTA: ((Symbol + Addend + 0x8000) >> 48) & 0xffff |
42cacb20 | 1647 | static inline void |
dd93cd0a AM |
1648 | addr16_ha3(unsigned char* view, Address value) |
1649 | { This::addr16_hi3(view, value + 0x8000); } | |
1650 | ||
1651 | // R_POWERPC_ADDR14: (Symbol + Addend) & 0xfffc | |
f4baf0d4 AM |
1652 | static inline Status |
1653 | addr14(unsigned char* view, Address value, Overflow_check overflow) | |
dd93cd0a | 1654 | { |
f4baf0d4 AM |
1655 | Status stat = This::template rela<32>(view, 0, 0xfffc, value, overflow); |
1656 | if (overflow != CHECK_NONE && (value & 3) != 0) | |
1657 | stat = STATUS_OVERFLOW; | |
dd93cd0a AM |
1658 | return stat; |
1659 | } | |
cf43a2fe AM |
1660 | }; |
1661 | ||
c9269dff AM |
1662 | // Stash away the index of .got2 or .opd in a relocatable object, if |
1663 | // such a section exists. | |
cf43a2fe AM |
1664 | |
1665 | template<int size, bool big_endian> | |
1666 | bool | |
1667 | Powerpc_relobj<size, big_endian>::do_find_special_sections( | |
1668 | Read_symbols_data* sd) | |
1669 | { | |
c9269dff AM |
1670 | const unsigned char* const pshdrs = sd->section_headers->data(); |
1671 | const unsigned char* namesu = sd->section_names->data(); | |
1672 | const char* names = reinterpret_cast<const char*>(namesu); | |
1673 | section_size_type names_size = sd->section_names_size; | |
1674 | const unsigned char* s; | |
1675 | ||
dc3714f3 AM |
1676 | s = this->template find_shdr<size, big_endian>(pshdrs, |
1677 | size == 32 ? ".got2" : ".opd", | |
1678 | names, names_size, NULL); | |
c9269dff AM |
1679 | if (s != NULL) |
1680 | { | |
1681 | unsigned int ndx = (s - pshdrs) / elfcpp::Elf_sizes<size>::shdr_size; | |
1682 | this->special_ = ndx; | |
1683 | } | |
1684 | return Sized_relobj_file<size, big_endian>::do_find_special_sections(sd); | |
1685 | } | |
1686 | ||
1687 | // Examine .rela.opd to build info about function entry points. | |
1688 | ||
1689 | template<int size, bool big_endian> | |
1690 | void | |
1691 | Powerpc_relobj<size, big_endian>::scan_opd_relocs( | |
1692 | size_t reloc_count, | |
1693 | const unsigned char* prelocs, | |
1694 | const unsigned char* plocal_syms) | |
1695 | { | |
1696 | if (size == 64) | |
cf43a2fe | 1697 | { |
c9269dff AM |
1698 | typedef typename Reloc_types<elfcpp::SHT_RELA, size, big_endian>::Reloc |
1699 | Reltype; | |
1700 | const int reloc_size | |
1701 | = Reloc_types<elfcpp::SHT_RELA, size, big_endian>::reloc_size; | |
1702 | const int sym_size = elfcpp::Elf_sizes<size>::sym_size; | |
ec4dbad3 AM |
1703 | Address expected_off = 0; |
1704 | bool regular = true; | |
1705 | unsigned int opd_ent_size = 0; | |
c9269dff AM |
1706 | |
1707 | for (size_t i = 0; i < reloc_count; ++i, prelocs += reloc_size) | |
cf43a2fe | 1708 | { |
c9269dff AM |
1709 | Reltype reloc(prelocs); |
1710 | typename elfcpp::Elf_types<size>::Elf_WXword r_info | |
1711 | = reloc.get_r_info(); | |
1712 | unsigned int r_type = elfcpp::elf_r_type<size>(r_info); | |
1713 | if (r_type == elfcpp::R_PPC64_ADDR64) | |
1714 | { | |
1715 | unsigned int r_sym = elfcpp::elf_r_sym<size>(r_info); | |
1716 | typename elfcpp::Elf_types<size>::Elf_Addr value; | |
1717 | bool is_ordinary; | |
1718 | unsigned int shndx; | |
1719 | if (r_sym < this->local_symbol_count()) | |
1720 | { | |
1721 | typename elfcpp::Sym<size, big_endian> | |
1722 | lsym(plocal_syms + r_sym * sym_size); | |
1723 | shndx = lsym.get_st_shndx(); | |
1724 | shndx = this->adjust_sym_shndx(r_sym, shndx, &is_ordinary); | |
1725 | value = lsym.get_st_value(); | |
1726 | } | |
1727 | else | |
1728 | shndx = this->symbol_section_and_value(r_sym, &value, | |
1729 | &is_ordinary); | |
1730 | this->set_opd_ent(reloc.get_r_offset(), shndx, | |
1731 | value + reloc.get_r_addend()); | |
ec4dbad3 AM |
1732 | if (i == 2) |
1733 | { | |
1734 | expected_off = reloc.get_r_offset(); | |
1735 | opd_ent_size = expected_off; | |
1736 | } | |
1737 | else if (expected_off != reloc.get_r_offset()) | |
1738 | regular = false; | |
1739 | expected_off += opd_ent_size; | |
1740 | } | |
1741 | else if (r_type == elfcpp::R_PPC64_TOC) | |
1742 | { | |
1743 | if (expected_off - opd_ent_size + 8 != reloc.get_r_offset()) | |
1744 | regular = false; | |
1745 | } | |
1746 | else | |
1747 | { | |
1748 | gold_warning(_("%s: unexpected reloc type %u in .opd section"), | |
1749 | this->name().c_str(), r_type); | |
1750 | regular = false; | |
c9269dff AM |
1751 | } |
1752 | } | |
ec4dbad3 AM |
1753 | if (reloc_count <= 2) |
1754 | opd_ent_size = this->section_size(this->opd_shndx()); | |
1755 | if (opd_ent_size != 24 && opd_ent_size != 16) | |
1756 | regular = false; | |
1757 | if (!regular) | |
1758 | { | |
1759 | gold_warning(_("%s: .opd is not a regular array of opd entries"), | |
1760 | this->name().c_str()); | |
1761 | opd_ent_size = 0; | |
1762 | } | |
c9269dff AM |
1763 | } |
1764 | } | |
1765 | ||
1766 | template<int size, bool big_endian> | |
1767 | void | |
1768 | Powerpc_relobj<size, big_endian>::do_read_relocs(Read_relocs_data* rd) | |
1769 | { | |
1770 | Sized_relobj_file<size, big_endian>::do_read_relocs(rd); | |
1771 | if (size == 64) | |
1772 | { | |
1773 | for (Read_relocs_data::Relocs_list::iterator p = rd->relocs.begin(); | |
1774 | p != rd->relocs.end(); | |
1775 | ++p) | |
1776 | { | |
1777 | if (p->data_shndx == this->opd_shndx()) | |
1778 | { | |
ec4dbad3 AM |
1779 | uint64_t opd_size = this->section_size(this->opd_shndx()); |
1780 | gold_assert(opd_size == static_cast<size_t>(opd_size)); | |
1781 | if (opd_size != 0) | |
1782 | { | |
1783 | this->init_opd(opd_size); | |
1784 | this->scan_opd_relocs(p->reloc_count, p->contents->data(), | |
1785 | rd->local_symbols->data()); | |
1786 | } | |
c9269dff AM |
1787 | break; |
1788 | } | |
cf43a2fe AM |
1789 | } |
1790 | } | |
cf43a2fe AM |
1791 | } |
1792 | ||
dc3714f3 AM |
1793 | // Call Sized_dynobj::do_read_symbols to read the symbols then |
1794 | // read .opd from a dynamic object, filling in opd_ent_ vector, | |
1795 | ||
1796 | template<int size, bool big_endian> | |
1797 | void | |
1798 | Powerpc_dynobj<size, big_endian>::do_read_symbols(Read_symbols_data* sd) | |
1799 | { | |
1800 | Sized_dynobj<size, big_endian>::do_read_symbols(sd); | |
1801 | if (size == 64) | |
1802 | { | |
1803 | const int shdr_size = elfcpp::Elf_sizes<size>::shdr_size; | |
1804 | const unsigned char* const pshdrs = sd->section_headers->data(); | |
1805 | const unsigned char* namesu = sd->section_names->data(); | |
1806 | const char* names = reinterpret_cast<const char*>(namesu); | |
1807 | const unsigned char* s = NULL; | |
1808 | const unsigned char* opd; | |
1809 | section_size_type opd_size; | |
1810 | ||
1811 | // Find and read .opd section. | |
1812 | while (1) | |
1813 | { | |
1814 | s = this->template find_shdr<size, big_endian>(pshdrs, ".opd", names, | |
1815 | sd->section_names_size, | |
1816 | s); | |
1817 | if (s == NULL) | |
1818 | return; | |
1819 | ||
1820 | typename elfcpp::Shdr<size, big_endian> shdr(s); | |
1821 | if (shdr.get_sh_type() == elfcpp::SHT_PROGBITS | |
1822 | && (shdr.get_sh_flags() & elfcpp::SHF_ALLOC) != 0) | |
1823 | { | |
1824 | this->opd_shndx_ = (s - pshdrs) / shdr_size; | |
1825 | this->opd_address_ = shdr.get_sh_addr(); | |
1826 | opd_size = convert_to_section_size_type(shdr.get_sh_size()); | |
1827 | opd = this->get_view(shdr.get_sh_offset(), opd_size, | |
1828 | true, false); | |
1829 | break; | |
1830 | } | |
1831 | } | |
1832 | ||
1833 | // Build set of executable sections. | |
1834 | // Using a set is probably overkill. There is likely to be only | |
1835 | // a few executable sections, typically .init, .text and .fini, | |
1836 | // and they are generally grouped together. | |
1837 | typedef std::set<Sec_info> Exec_sections; | |
1838 | Exec_sections exec_sections; | |
1839 | s = pshdrs; | |
1840 | for (unsigned int i = 1; i < this->shnum(); ++i, s += shdr_size) | |
1841 | { | |
1842 | typename elfcpp::Shdr<size, big_endian> shdr(s); | |
1843 | if (shdr.get_sh_type() == elfcpp::SHT_PROGBITS | |
1844 | && ((shdr.get_sh_flags() | |
1845 | & (elfcpp::SHF_ALLOC | elfcpp::SHF_EXECINSTR)) | |
1846 | == (elfcpp::SHF_ALLOC | elfcpp::SHF_EXECINSTR)) | |
1847 | && shdr.get_sh_size() != 0) | |
1848 | { | |
1849 | exec_sections.insert(Sec_info(shdr.get_sh_addr(), | |
1850 | shdr.get_sh_size(), i)); | |
1851 | } | |
1852 | } | |
1853 | if (exec_sections.empty()) | |
1854 | return; | |
1855 | ||
1856 | // Look over the OPD entries. This is complicated by the fact | |
1857 | // that some binaries will use two-word entries while others | |
1858 | // will use the standard three-word entries. In most cases | |
1859 | // the third word (the environment pointer for languages like | |
1860 | // Pascal) is unused and will be zero. If the third word is | |
1861 | // used it should not be pointing into executable sections, | |
1862 | // I think. | |
1863 | this->init_opd(opd_size); | |
1864 | for (const unsigned char* p = opd; p < opd + opd_size; p += 8) | |
1865 | { | |
1866 | typedef typename elfcpp::Swap<64, big_endian>::Valtype Valtype; | |
1867 | const Valtype* valp = reinterpret_cast<const Valtype*>(p); | |
1868 | Valtype val = elfcpp::Swap<64, big_endian>::readval(valp); | |
1869 | if (val == 0) | |
1870 | // Chances are that this is the third word of an OPD entry. | |
1871 | continue; | |
1872 | typename Exec_sections::const_iterator e | |
1873 | = exec_sections.upper_bound(Sec_info(val, 0, 0)); | |
1874 | if (e != exec_sections.begin()) | |
1875 | { | |
1876 | --e; | |
1877 | if (e->start <= val && val < e->start + e->len) | |
1878 | { | |
1879 | // We have an address in an executable section. | |
1880 | // VAL ought to be the function entry, set it up. | |
1881 | this->set_opd_ent(p - opd, e->shndx, val); | |
1882 | // Skip second word of OPD entry, the TOC pointer. | |
1883 | p += 8; | |
1884 | } | |
1885 | } | |
1886 | // If we didn't match any executable sections, we likely | |
1887 | // have a non-zero third word in the OPD entry. | |
1888 | } | |
1889 | } | |
1890 | } | |
1891 | ||
f43ba157 | 1892 | // Set up some symbols. |
26a4e9cb AM |
1893 | |
1894 | template<int size, bool big_endian> | |
1895 | void | |
f43ba157 AM |
1896 | Target_powerpc<size, big_endian>::do_define_standard_symbols( |
1897 | Symbol_table* symtab, | |
1898 | Layout* layout) | |
26a4e9cb AM |
1899 | { |
1900 | if (size == 32) | |
1901 | { | |
bb66a627 AM |
1902 | // Define _GLOBAL_OFFSET_TABLE_ to ensure it isn't seen as |
1903 | // undefined when scanning relocs (and thus requires | |
26a4e9cb AM |
1904 | // non-relative dynamic relocs). The proper value will be |
1905 | // updated later. | |
1906 | Symbol *gotsym = symtab->lookup("_GLOBAL_OFFSET_TABLE_", NULL); | |
1907 | if (gotsym != NULL && gotsym->is_undefined()) | |
1908 | { | |
1909 | Target_powerpc<size, big_endian>* target = | |
1910 | static_cast<Target_powerpc<size, big_endian>*>( | |
1911 | parameters->sized_target<size, big_endian>()); | |
1912 | Output_data_got_powerpc<size, big_endian>* got | |
1913 | = target->got_section(symtab, layout); | |
1914 | symtab->define_in_output_data("_GLOBAL_OFFSET_TABLE_", NULL, | |
1915 | Symbol_table::PREDEFINED, | |
1916 | got, 0, 0, | |
1917 | elfcpp::STT_OBJECT, | |
bb66a627 | 1918 | elfcpp::STB_LOCAL, |
26a4e9cb AM |
1919 | elfcpp::STV_HIDDEN, 0, |
1920 | false, false); | |
1921 | } | |
1922 | ||
1923 | // Define _SDA_BASE_ at the start of the .sdata section + 32768. | |
1924 | Symbol *sdasym = symtab->lookup("_SDA_BASE_", NULL); | |
1925 | if (sdasym != NULL && sdasym->is_undefined()) | |
1926 | { | |
1927 | Output_data_space* sdata = new Output_data_space(4, "** sdata"); | |
1928 | Output_section* os | |
1929 | = layout->add_output_section_data(".sdata", 0, | |
1930 | elfcpp::SHF_ALLOC | |
1931 | | elfcpp::SHF_WRITE, | |
1932 | sdata, ORDER_SMALL_DATA, false); | |
1933 | symtab->define_in_output_data("_SDA_BASE_", NULL, | |
1934 | Symbol_table::PREDEFINED, | |
1935 | os, 32768, 0, elfcpp::STT_OBJECT, | |
1936 | elfcpp::STB_LOCAL, elfcpp::STV_HIDDEN, | |
1937 | 0, false, false); | |
1938 | } | |
1939 | } | |
26a4e9cb AM |
1940 | } |
1941 | ||
cf43a2fe AM |
1942 | // Set up PowerPC target specific relobj. |
1943 | ||
1944 | template<int size, bool big_endian> | |
1945 | Object* | |
1946 | Target_powerpc<size, big_endian>::do_make_elf_object( | |
1947 | const std::string& name, | |
1948 | Input_file* input_file, | |
1949 | off_t offset, const elfcpp::Ehdr<size, big_endian>& ehdr) | |
1950 | { | |
1951 | int et = ehdr.get_e_type(); | |
957564c9 AS |
1952 | // ET_EXEC files are valid input for --just-symbols/-R, |
1953 | // and we treat them as relocatable objects. | |
1954 | if (et == elfcpp::ET_REL | |
1955 | || (et == elfcpp::ET_EXEC && input_file->just_symbols())) | |
cf43a2fe AM |
1956 | { |
1957 | Powerpc_relobj<size, big_endian>* obj = | |
c9269dff | 1958 | new Powerpc_relobj<size, big_endian>(name, input_file, offset, ehdr); |
cf43a2fe AM |
1959 | obj->setup(); |
1960 | return obj; | |
1961 | } | |
1962 | else if (et == elfcpp::ET_DYN) | |
1963 | { | |
dc3714f3 AM |
1964 | Powerpc_dynobj<size, big_endian>* obj = |
1965 | new Powerpc_dynobj<size, big_endian>(name, input_file, offset, ehdr); | |
cf43a2fe AM |
1966 | obj->setup(); |
1967 | return obj; | |
1968 | } | |
1969 | else | |
1970 | { | |
c9269dff | 1971 | gold_error(_("%s: unsupported ELF file type %d"), name.c_str(), et); |
cf43a2fe AM |
1972 | return NULL; |
1973 | } | |
1974 | } | |
1975 | ||
1976 | template<int size, bool big_endian> | |
1977 | class Output_data_got_powerpc : public Output_data_got<size, big_endian> | |
1978 | { | |
1979 | public: | |
1980 | typedef typename elfcpp::Elf_types<size>::Elf_Addr Valtype; | |
1981 | typedef Output_data_reloc<elfcpp::SHT_RELA, true, size, big_endian> Rela_dyn; | |
1982 | ||
1983 | Output_data_got_powerpc(Symbol_table* symtab, Layout* layout) | |
1984 | : Output_data_got<size, big_endian>(), | |
1985 | symtab_(symtab), layout_(layout), | |
1986 | header_ent_cnt_(size == 32 ? 3 : 1), | |
1987 | header_index_(size == 32 ? 0x2000 : 0) | |
9e69ed50 | 1988 | { } |
cf43a2fe | 1989 | |
e84fe78f AM |
1990 | // Override all the Output_data_got methods we use so as to first call |
1991 | // reserve_ent(). | |
1992 | bool | |
1993 | add_global(Symbol* gsym, unsigned int got_type) | |
1994 | { | |
1995 | this->reserve_ent(); | |
1996 | return Output_data_got<size, big_endian>::add_global(gsym, got_type); | |
1997 | } | |
1998 | ||
1999 | bool | |
2000 | add_global_plt(Symbol* gsym, unsigned int got_type) | |
2001 | { | |
2002 | this->reserve_ent(); | |
2003 | return Output_data_got<size, big_endian>::add_global_plt(gsym, got_type); | |
2004 | } | |
2005 | ||
2006 | bool | |
2007 | add_global_tls(Symbol* gsym, unsigned int got_type) | |
2008 | { return this->add_global_plt(gsym, got_type); } | |
2009 | ||
2010 | void | |
2011 | add_global_with_rel(Symbol* gsym, unsigned int got_type, | |
2012 | Output_data_reloc_generic* rel_dyn, unsigned int r_type) | |
2013 | { | |
2014 | this->reserve_ent(); | |
2015 | Output_data_got<size, big_endian>:: | |
2016 | add_global_with_rel(gsym, got_type, rel_dyn, r_type); | |
2017 | } | |
2018 | ||
2019 | void | |
2020 | add_global_pair_with_rel(Symbol* gsym, unsigned int got_type, | |
2021 | Output_data_reloc_generic* rel_dyn, | |
2022 | unsigned int r_type_1, unsigned int r_type_2) | |
2023 | { | |
2024 | this->reserve_ent(2); | |
2025 | Output_data_got<size, big_endian>:: | |
2026 | add_global_pair_with_rel(gsym, got_type, rel_dyn, r_type_1, r_type_2); | |
2027 | } | |
2028 | ||
2029 | bool | |
2030 | add_local(Relobj* object, unsigned int sym_index, unsigned int got_type) | |
2031 | { | |
2032 | this->reserve_ent(); | |
2033 | return Output_data_got<size, big_endian>::add_local(object, sym_index, | |
2034 | got_type); | |
2035 | } | |
2036 | ||
2037 | bool | |
2038 | add_local_plt(Relobj* object, unsigned int sym_index, unsigned int got_type) | |
2039 | { | |
2040 | this->reserve_ent(); | |
2041 | return Output_data_got<size, big_endian>::add_local_plt(object, sym_index, | |
2042 | got_type); | |
2043 | } | |
2044 | ||
2045 | bool | |
2046 | add_local_tls(Relobj* object, unsigned int sym_index, unsigned int got_type) | |
2047 | { return this->add_local_plt(object, sym_index, got_type); } | |
2048 | ||
2049 | void | |
2050 | add_local_tls_pair(Relobj* object, unsigned int sym_index, | |
2051 | unsigned int got_type, | |
2052 | Output_data_reloc_generic* rel_dyn, | |
2053 | unsigned int r_type) | |
2054 | { | |
2055 | this->reserve_ent(2); | |
2056 | Output_data_got<size, big_endian>:: | |
2057 | add_local_tls_pair(object, sym_index, got_type, rel_dyn, r_type); | |
2058 | } | |
2059 | ||
2060 | unsigned int | |
2061 | add_constant(Valtype constant) | |
2062 | { | |
2063 | this->reserve_ent(); | |
2064 | return Output_data_got<size, big_endian>::add_constant(constant); | |
2065 | } | |
2066 | ||
dd93cd0a AM |
2067 | unsigned int |
2068 | add_constant_pair(Valtype c1, Valtype c2) | |
2069 | { | |
2070 | this->reserve_ent(2); | |
e84fe78f | 2071 | return Output_data_got<size, big_endian>::add_constant_pair(c1, c2); |
dd93cd0a AM |
2072 | } |
2073 | ||
2074 | // Offset of _GLOBAL_OFFSET_TABLE_. | |
cf43a2fe AM |
2075 | unsigned int |
2076 | g_o_t() const | |
2077 | { | |
2078 | return this->got_offset(this->header_index_); | |
42cacb20 | 2079 | } |
cf43a2fe | 2080 | |
dd93cd0a AM |
2081 | // Offset of base used to access the GOT/TOC. |
2082 | // The got/toc pointer reg will be set to this value. | |
26a4e9cb | 2083 | Valtype |
dd93cd0a AM |
2084 | got_base_offset(const Powerpc_relobj<size, big_endian>* object) const |
2085 | { | |
2086 | if (size == 32) | |
2087 | return this->g_o_t(); | |
2088 | else | |
2089 | return (this->output_section()->address() | |
2090 | + object->toc_base_offset() | |
2091 | - this->address()); | |
2092 | } | |
2093 | ||
cf43a2fe AM |
2094 | // Ensure our GOT has a header. |
2095 | void | |
2096 | set_final_data_size() | |
2097 | { | |
2098 | if (this->header_ent_cnt_ != 0) | |
2099 | this->make_header(); | |
2100 | Output_data_got<size, big_endian>::set_final_data_size(); | |
2101 | } | |
2102 | ||
2103 | // First word of GOT header needs some values that are not | |
2104 | // handled by Output_data_got so poke them in here. | |
2105 | // For 32-bit, address of .dynamic, for 64-bit, address of TOCbase. | |
2106 | void | |
2107 | do_write(Output_file* of) | |
2108 | { | |
c9824451 AM |
2109 | Valtype val = 0; |
2110 | if (size == 32 && this->layout_->dynamic_data() != NULL) | |
2111 | val = this->layout_->dynamic_section()->address(); | |
2112 | if (size == 64) | |
2113 | val = this->output_section()->address() + 0x8000; | |
2114 | this->replace_constant(this->header_index_, val); | |
cf43a2fe AM |
2115 | Output_data_got<size, big_endian>::do_write(of); |
2116 | } | |
2117 | ||
2118 | private: | |
2119 | void | |
2120 | reserve_ent(unsigned int cnt = 1) | |
2121 | { | |
2122 | if (this->header_ent_cnt_ == 0) | |
2123 | return; | |
2124 | if (this->num_entries() + cnt > this->header_index_) | |
2125 | this->make_header(); | |
2126 | } | |
2127 | ||
2128 | void | |
2129 | make_header() | |
2130 | { | |
2131 | this->header_ent_cnt_ = 0; | |
2132 | this->header_index_ = this->num_entries(); | |
2133 | if (size == 32) | |
2134 | { | |
2135 | Output_data_got<size, big_endian>::add_constant(0); | |
2136 | Output_data_got<size, big_endian>::add_constant(0); | |
2137 | Output_data_got<size, big_endian>::add_constant(0); | |
2138 | ||
2139 | // Define _GLOBAL_OFFSET_TABLE_ at the header | |
bb66a627 AM |
2140 | Symbol *gotsym = this->symtab_->lookup("_GLOBAL_OFFSET_TABLE_", NULL); |
2141 | if (gotsym != NULL) | |
2142 | { | |
2143 | Sized_symbol<size>* sym = static_cast<Sized_symbol<size>*>(gotsym); | |
2144 | sym->set_value(this->g_o_t()); | |
2145 | } | |
2146 | else | |
2147 | this->symtab_->define_in_output_data("_GLOBAL_OFFSET_TABLE_", NULL, | |
2148 | Symbol_table::PREDEFINED, | |
2149 | this, this->g_o_t(), 0, | |
2150 | elfcpp::STT_OBJECT, | |
2151 | elfcpp::STB_LOCAL, | |
2152 | elfcpp::STV_HIDDEN, 0, | |
2153 | false, false); | |
cf43a2fe AM |
2154 | } |
2155 | else | |
2156 | Output_data_got<size, big_endian>::add_constant(0); | |
2157 | } | |
2158 | ||
2159 | // Stashed pointers. | |
2160 | Symbol_table* symtab_; | |
2161 | Layout* layout_; | |
2162 | ||
2163 | // GOT header size. | |
2164 | unsigned int header_ent_cnt_; | |
2165 | // GOT header index. | |
2166 | unsigned int header_index_; | |
42cacb20 DE |
2167 | }; |
2168 | ||
2169 | // Get the GOT section, creating it if necessary. | |
2170 | ||
2171 | template<int size, bool big_endian> | |
cf43a2fe | 2172 | Output_data_got_powerpc<size, big_endian>* |
42cacb20 DE |
2173 | Target_powerpc<size, big_endian>::got_section(Symbol_table* symtab, |
2174 | Layout* layout) | |
2175 | { | |
2176 | if (this->got_ == NULL) | |
2177 | { | |
2178 | gold_assert(symtab != NULL && layout != NULL); | |
2179 | ||
cf43a2fe AM |
2180 | this->got_ |
2181 | = new Output_data_got_powerpc<size, big_endian>(symtab, layout); | |
42cacb20 DE |
2182 | |
2183 | layout->add_output_section_data(".got", elfcpp::SHT_PROGBITS, | |
2184 | elfcpp::SHF_ALLOC | elfcpp::SHF_WRITE, | |
22f0da72 | 2185 | this->got_, ORDER_DATA, false); |
42cacb20 DE |
2186 | } |
2187 | ||
2188 | return this->got_; | |
2189 | } | |
2190 | ||
2191 | // Get the dynamic reloc section, creating it if necessary. | |
2192 | ||
2193 | template<int size, bool big_endian> | |
2194 | typename Target_powerpc<size, big_endian>::Reloc_section* | |
2195 | Target_powerpc<size, big_endian>::rela_dyn_section(Layout* layout) | |
2196 | { | |
2197 | if (this->rela_dyn_ == NULL) | |
2198 | { | |
2199 | gold_assert(layout != NULL); | |
2200 | this->rela_dyn_ = new Reloc_section(parameters->options().combreloc()); | |
2201 | layout->add_output_section_data(".rela.dyn", elfcpp::SHT_RELA, | |
22f0da72 ILT |
2202 | elfcpp::SHF_ALLOC, this->rela_dyn_, |
2203 | ORDER_DYNAMIC_RELOCS, false); | |
42cacb20 DE |
2204 | } |
2205 | return this->rela_dyn_; | |
2206 | } | |
2207 | ||
b3ccdeb5 AM |
2208 | // Similarly, but for ifunc symbols get the one for ifunc. |
2209 | ||
2210 | template<int size, bool big_endian> | |
2211 | typename Target_powerpc<size, big_endian>::Reloc_section* | |
2212 | Target_powerpc<size, big_endian>::rela_dyn_section(Symbol_table* symtab, | |
2213 | Layout* layout, | |
2214 | bool for_ifunc) | |
2215 | { | |
2216 | if (!for_ifunc) | |
2217 | return this->rela_dyn_section(layout); | |
2218 | ||
2219 | if (this->iplt_ == NULL) | |
2220 | this->make_iplt_section(symtab, layout); | |
2221 | return this->iplt_->rel_plt(); | |
2222 | } | |
2223 | ||
ec661b9d AM |
2224 | class Stub_control |
2225 | { | |
2226 | public: | |
2227 | // Determine the stub group size. The group size is the absolute | |
2228 | // value of the parameter --stub-group-size. If --stub-group-size | |
2229 | // is passed a negative value, we restrict stubs to be always before | |
2230 | // the stubbed branches. | |
2231 | Stub_control(int32_t size) | |
2232 | : state_(NO_GROUP), stub_group_size_(abs(size)), | |
2233 | stub14_group_size_(abs(size)), | |
2234 | stubs_always_before_branch_(size < 0), suppress_size_errors_(false), | |
2235 | group_end_addr_(0), owner_(NULL), output_section_(NULL) | |
2236 | { | |
2237 | if (stub_group_size_ == 1) | |
2238 | { | |
2239 | // Default values. | |
2240 | if (stubs_always_before_branch_) | |
2241 | { | |
2242 | stub_group_size_ = 0x1e00000; | |
2243 | stub14_group_size_ = 0x7800; | |
2244 | } | |
2245 | else | |
2246 | { | |
2247 | stub_group_size_ = 0x1c00000; | |
2248 | stub14_group_size_ = 0x7000; | |
2249 | } | |
2250 | suppress_size_errors_ = true; | |
2251 | } | |
2252 | } | |
2253 | ||
2254 | // Return true iff input section can be handled by current stub | |
2255 | // group. | |
2256 | bool | |
2257 | can_add_to_stub_group(Output_section* o, | |
2258 | const Output_section::Input_section* i, | |
2259 | bool has14); | |
2260 | ||
2261 | const Output_section::Input_section* | |
2262 | owner() | |
2263 | { return owner_; } | |
2264 | ||
2265 | Output_section* | |
2266 | output_section() | |
2267 | { return output_section_; } | |
2268 | ||
2269 | private: | |
2270 | typedef enum | |
2271 | { | |
2272 | NO_GROUP, | |
2273 | FINDING_STUB_SECTION, | |
2274 | HAS_STUB_SECTION | |
2275 | } State; | |
2276 | ||
2277 | State state_; | |
2278 | uint32_t stub_group_size_; | |
2279 | uint32_t stub14_group_size_; | |
2280 | bool stubs_always_before_branch_; | |
2281 | bool suppress_size_errors_; | |
2282 | uint64_t group_end_addr_; | |
2283 | const Output_section::Input_section* owner_; | |
2284 | Output_section* output_section_; | |
2285 | }; | |
2286 | ||
0cfdc767 | 2287 | // Return true iff input section can be handled by current stub |
ec661b9d AM |
2288 | // group. |
2289 | ||
2290 | bool | |
2291 | Stub_control::can_add_to_stub_group(Output_section* o, | |
2292 | const Output_section::Input_section* i, | |
2293 | bool has14) | |
2294 | { | |
2295 | uint32_t group_size | |
2296 | = has14 ? this->stub14_group_size_ : this->stub_group_size_; | |
2297 | bool whole_sec = o->order() == ORDER_INIT || o->order() == ORDER_FINI; | |
2298 | uint64_t this_size; | |
2299 | uint64_t start_addr = o->address(); | |
2300 | ||
2301 | if (whole_sec) | |
2302 | // .init and .fini sections are pasted together to form a single | |
2303 | // function. We can't be adding stubs in the middle of the function. | |
2304 | this_size = o->data_size(); | |
2305 | else | |
2306 | { | |
2307 | start_addr += i->relobj()->output_section_offset(i->shndx()); | |
2308 | this_size = i->data_size(); | |
2309 | } | |
2310 | uint64_t end_addr = start_addr + this_size; | |
2311 | bool toobig = this_size > group_size; | |
2312 | ||
2313 | if (toobig && !this->suppress_size_errors_) | |
2314 | gold_warning(_("%s:%s exceeds group size"), | |
2315 | i->relobj()->name().c_str(), | |
2316 | i->relobj()->section_name(i->shndx()).c_str()); | |
2317 | ||
2318 | if (this->state_ != HAS_STUB_SECTION | |
0cfdc767 AM |
2319 | && (!whole_sec || this->output_section_ != o) |
2320 | && (this->state_ == NO_GROUP | |
2321 | || this->group_end_addr_ - end_addr < group_size)) | |
ec661b9d AM |
2322 | { |
2323 | this->owner_ = i; | |
2324 | this->output_section_ = o; | |
2325 | } | |
2326 | ||
2327 | if (this->state_ == NO_GROUP) | |
2328 | { | |
2329 | this->state_ = FINDING_STUB_SECTION; | |
2330 | this->group_end_addr_ = end_addr; | |
2331 | } | |
2332 | else if (this->group_end_addr_ - start_addr < group_size) | |
2333 | ; | |
2334 | // Adding this section would make the group larger than GROUP_SIZE. | |
2335 | else if (this->state_ == FINDING_STUB_SECTION | |
2336 | && !this->stubs_always_before_branch_ | |
2337 | && !toobig) | |
2338 | { | |
2339 | // But wait, there's more! Input sections up to GROUP_SIZE | |
2340 | // bytes before the stub table can be handled by it too. | |
2341 | this->state_ = HAS_STUB_SECTION; | |
2342 | this->group_end_addr_ = end_addr; | |
2343 | } | |
2344 | else | |
2345 | { | |
2346 | this->state_ = NO_GROUP; | |
2347 | return false; | |
2348 | } | |
2349 | return true; | |
2350 | } | |
2351 | ||
2352 | // Look over all the input sections, deciding where to place stubs. | |
2353 | ||
2354 | template<int size, bool big_endian> | |
2355 | void | |
2356 | Target_powerpc<size, big_endian>::group_sections(Layout* layout, | |
2357 | const Task*) | |
2358 | { | |
2359 | Stub_control stub_control(parameters->options().stub_group_size()); | |
2360 | ||
2361 | // Group input sections and insert stub table | |
2362 | Stub_table<size, big_endian>* stub_table = NULL; | |
2363 | Layout::Section_list section_list; | |
2364 | layout->get_executable_sections(§ion_list); | |
2365 | std::stable_sort(section_list.begin(), section_list.end(), Sort_sections()); | |
2366 | for (Layout::Section_list::reverse_iterator o = section_list.rbegin(); | |
2367 | o != section_list.rend(); | |
2368 | ++o) | |
2369 | { | |
2370 | typedef Output_section::Input_section_list Input_section_list; | |
2371 | for (Input_section_list::const_reverse_iterator i | |
2372 | = (*o)->input_sections().rbegin(); | |
2373 | i != (*o)->input_sections().rend(); | |
2374 | ++i) | |
2375 | { | |
2376 | if (i->is_input_section()) | |
2377 | { | |
2378 | Powerpc_relobj<size, big_endian>* ppcobj = static_cast | |
2379 | <Powerpc_relobj<size, big_endian>*>(i->relobj()); | |
2380 | bool has14 = ppcobj->has_14bit_branch(i->shndx()); | |
2381 | if (!stub_control.can_add_to_stub_group(*o, &*i, has14)) | |
2382 | { | |
2383 | stub_table->init(stub_control.owner(), | |
2384 | stub_control.output_section()); | |
2385 | stub_table = NULL; | |
2386 | } | |
2387 | if (stub_table == NULL) | |
2388 | stub_table = this->new_stub_table(); | |
2389 | ppcobj->set_stub_table(i->shndx(), stub_table); | |
2390 | } | |
2391 | } | |
2392 | } | |
2393 | if (stub_table != NULL) | |
0cfdc767 AM |
2394 | { |
2395 | const Output_section::Input_section* i = stub_control.owner(); | |
2396 | if (!i->is_input_section()) | |
2397 | { | |
2398 | // Corner case. A new stub group was made for the first | |
2399 | // section (last one looked at here) for some reason, but | |
2400 | // the first section is already being used as the owner for | |
2401 | // a stub table for following sections. Force it into that | |
2402 | // stub group. | |
2403 | gold_assert(this->stub_tables_.size() >= 2); | |
2404 | this->stub_tables_.pop_back(); | |
2405 | delete stub_table; | |
2406 | Powerpc_relobj<size, big_endian>* ppcobj = static_cast | |
2407 | <Powerpc_relobj<size, big_endian>*>(i->relobj()); | |
2408 | ppcobj->set_stub_table(i->shndx(), this->stub_tables_.back()); | |
2409 | } | |
2410 | else | |
2411 | stub_table->init(i, stub_control.output_section()); | |
2412 | } | |
ec661b9d AM |
2413 | } |
2414 | ||
2415 | // If this branch needs a plt call stub, or a long branch stub, make one. | |
2416 | ||
2417 | template<int size, bool big_endian> | |
2418 | void | |
2419 | Target_powerpc<size, big_endian>::Branch_info::make_stub( | |
2420 | Stub_table<size, big_endian>* stub_table, | |
2421 | Stub_table<size, big_endian>* ifunc_stub_table, | |
2422 | Symbol_table* symtab) const | |
2423 | { | |
2424 | Symbol* sym = this->object_->global_symbol(this->r_sym_); | |
2425 | if (sym != NULL && sym->is_forwarder()) | |
2426 | sym = symtab->resolve_forwards(sym); | |
2427 | const Sized_symbol<size>* gsym = static_cast<const Sized_symbol<size>*>(sym); | |
2428 | if (gsym != NULL | |
2429 | ? use_plt_offset<size>(gsym, Scan::get_reference_flags(this->r_type_)) | |
2430 | : this->object_->local_has_plt_offset(this->r_sym_)) | |
2431 | { | |
2432 | if (stub_table == NULL) | |
2433 | stub_table = this->object_->stub_table(this->shndx_); | |
2434 | if (stub_table == NULL) | |
2435 | { | |
2436 | // This is a ref from a data section to an ifunc symbol. | |
2437 | stub_table = ifunc_stub_table; | |
2438 | } | |
2439 | gold_assert(stub_table != NULL); | |
2440 | if (gsym != NULL) | |
2441 | stub_table->add_plt_call_entry(this->object_, gsym, | |
2442 | this->r_type_, this->addend_); | |
2443 | else | |
2444 | stub_table->add_plt_call_entry(this->object_, this->r_sym_, | |
2445 | this->r_type_, this->addend_); | |
2446 | } | |
2447 | else | |
2448 | { | |
2449 | unsigned int max_branch_offset; | |
2450 | if (this->r_type_ == elfcpp::R_POWERPC_REL14 | |
2451 | || this->r_type_ == elfcpp::R_POWERPC_REL14_BRTAKEN | |
2452 | || this->r_type_ == elfcpp::R_POWERPC_REL14_BRNTAKEN) | |
2453 | max_branch_offset = 1 << 15; | |
2454 | else if (this->r_type_ == elfcpp::R_POWERPC_REL24 | |
2455 | || this->r_type_ == elfcpp::R_PPC_PLTREL24 | |
2456 | || this->r_type_ == elfcpp::R_PPC_LOCAL24PC) | |
2457 | max_branch_offset = 1 << 25; | |
2458 | else | |
2459 | return; | |
2460 | Address from = this->object_->get_output_section_offset(this->shndx_); | |
2461 | gold_assert(from != invalid_address); | |
2462 | from += (this->object_->output_section(this->shndx_)->address() | |
2463 | + this->offset_); | |
2464 | Address to; | |
2465 | if (gsym != NULL) | |
2466 | { | |
2467 | switch (gsym->source()) | |
2468 | { | |
2469 | case Symbol::FROM_OBJECT: | |
2470 | { | |
2471 | Object* symobj = gsym->object(); | |
2472 | if (symobj->is_dynamic() | |
2473 | || symobj->pluginobj() != NULL) | |
2474 | return; | |
2475 | bool is_ordinary; | |
2476 | unsigned int shndx = gsym->shndx(&is_ordinary); | |
2477 | if (shndx == elfcpp::SHN_UNDEF) | |
2478 | return; | |
2479 | } | |
2480 | break; | |
2481 | ||
2482 | case Symbol::IS_UNDEFINED: | |
2483 | return; | |
2484 | ||
2485 | default: | |
2486 | break; | |
2487 | } | |
2488 | Symbol_table::Compute_final_value_status status; | |
2489 | to = symtab->compute_final_value<size>(gsym, &status); | |
2490 | if (status != Symbol_table::CFVS_OK) | |
2491 | return; | |
2492 | } | |
2493 | else | |
2494 | { | |
2495 | const Symbol_value<size>* psymval | |
2496 | = this->object_->local_symbol(this->r_sym_); | |
2497 | Symbol_value<size> symval; | |
2498 | typedef Sized_relobj_file<size, big_endian> ObjType; | |
2499 | typename ObjType::Compute_final_local_value_status status | |
2500 | = this->object_->compute_final_local_value(this->r_sym_, psymval, | |
2501 | &symval, symtab); | |
2502 | if (status != ObjType::CFLV_OK | |
2503 | || !symval.has_output_value()) | |
2504 | return; | |
2505 | to = symval.value(this->object_, 0); | |
2506 | } | |
906b9150 | 2507 | to += this->addend_; |
ec661b9d AM |
2508 | if (stub_table == NULL) |
2509 | stub_table = this->object_->stub_table(this->shndx_); | |
ec661b9d AM |
2510 | if (size == 64 && is_branch_reloc(this->r_type_)) |
2511 | { | |
2512 | unsigned int dest_shndx; | |
0cfdc767 AM |
2513 | Target_powerpc<size, big_endian>* target = |
2514 | static_cast<Target_powerpc<size, big_endian>*>( | |
2515 | parameters->sized_target<size, big_endian>()); | |
2516 | to = target->symval_for_branch(symtab, to, gsym, | |
2517 | this->object_, &dest_shndx); | |
ec661b9d AM |
2518 | } |
2519 | Address delta = to - from; | |
2520 | if (delta + max_branch_offset >= 2 * max_branch_offset) | |
2521 | { | |
0cfdc767 AM |
2522 | if (stub_table == NULL) |
2523 | { | |
2524 | gold_warning(_("%s:%s: branch in non-executable section," | |
2525 | " no long branch stub for you"), | |
2526 | this->object_->name().c_str(), | |
2527 | this->object_->section_name(this->shndx_).c_str()); | |
2528 | return; | |
2529 | } | |
ec661b9d AM |
2530 | stub_table->add_long_branch_entry(this->object_, to); |
2531 | } | |
2532 | } | |
2533 | } | |
2534 | ||
2535 | // Relaxation hook. This is where we do stub generation. | |
2536 | ||
2537 | template<int size, bool big_endian> | |
2538 | bool | |
2539 | Target_powerpc<size, big_endian>::do_relax(int pass, | |
2540 | const Input_objects*, | |
2541 | Symbol_table* symtab, | |
2542 | Layout* layout, | |
2543 | const Task* task) | |
2544 | { | |
2545 | unsigned int prev_brlt_size = 0; | |
2546 | if (pass == 1) | |
ec661b9d | 2547 | { |
9e69ed50 AM |
2548 | bool thread_safe = parameters->options().plt_thread_safe(); |
2549 | if (size == 64 && !parameters->options().user_set_plt_thread_safe()) | |
ec661b9d | 2550 | { |
e2458743 | 2551 | static const char* const thread_starter[] = |
9e69ed50 AM |
2552 | { |
2553 | "pthread_create", | |
2554 | /* libstdc++ */ | |
2555 | "_ZNSt6thread15_M_start_threadESt10shared_ptrINS_10_Impl_baseEE", | |
2556 | /* librt */ | |
2557 | "aio_init", "aio_read", "aio_write", "aio_fsync", "lio_listio", | |
2558 | "mq_notify", "create_timer", | |
2559 | /* libanl */ | |
2560 | "getaddrinfo_a", | |
2561 | /* libgomp */ | |
2562 | "GOMP_parallel_start", | |
2563 | "GOMP_parallel_loop_static_start", | |
2564 | "GOMP_parallel_loop_dynamic_start", | |
2565 | "GOMP_parallel_loop_guided_start", | |
2566 | "GOMP_parallel_loop_runtime_start", | |
43819297 | 2567 | "GOMP_parallel_sections_start", |
9e69ed50 AM |
2568 | }; |
2569 | ||
e2458743 AM |
2570 | if (parameters->options().shared()) |
2571 | thread_safe = true; | |
2572 | else | |
9e69ed50 | 2573 | { |
e2458743 AM |
2574 | for (unsigned int i = 0; |
2575 | i < sizeof(thread_starter) / sizeof(thread_starter[0]); | |
2576 | i++) | |
2577 | { | |
2578 | Symbol* sym = symtab->lookup(thread_starter[i], NULL); | |
2579 | thread_safe = (sym != NULL | |
2580 | && sym->in_reg() | |
2581 | && sym->in_real_elf()); | |
2582 | if (thread_safe) | |
2583 | break; | |
2584 | } | |
9e69ed50 | 2585 | } |
ec661b9d | 2586 | } |
9e69ed50 AM |
2587 | this->plt_thread_safe_ = thread_safe; |
2588 | this->group_sections(layout, task); | |
ec661b9d AM |
2589 | } |
2590 | ||
2591 | // We need address of stub tables valid for make_stub. | |
2592 | for (typename Stub_tables::iterator p = this->stub_tables_.begin(); | |
2593 | p != this->stub_tables_.end(); | |
2594 | ++p) | |
2595 | { | |
2596 | const Powerpc_relobj<size, big_endian>* object | |
2597 | = static_cast<const Powerpc_relobj<size, big_endian>*>((*p)->relobj()); | |
2598 | Address off = object->get_output_section_offset((*p)->shndx()); | |
2599 | gold_assert(off != invalid_address); | |
2600 | Output_section* os = (*p)->output_section(); | |
2601 | (*p)->set_address_and_size(os, off); | |
2602 | } | |
2603 | ||
9e69ed50 AM |
2604 | if (pass != 1) |
2605 | { | |
2606 | // Clear plt call stubs, long branch stubs and branch lookup table. | |
2607 | prev_brlt_size = this->branch_lookup_table_.size(); | |
2608 | this->branch_lookup_table_.clear(); | |
2609 | for (typename Stub_tables::iterator p = this->stub_tables_.begin(); | |
2610 | p != this->stub_tables_.end(); | |
2611 | ++p) | |
2612 | { | |
2613 | (*p)->clear_stubs(); | |
2614 | } | |
2615 | } | |
2616 | ||
2617 | // Build all the stubs. | |
ec661b9d AM |
2618 | Stub_table<size, big_endian>* ifunc_stub_table |
2619 | = this->stub_tables_.size() == 0 ? NULL : this->stub_tables_[0]; | |
2620 | Stub_table<size, big_endian>* one_stub_table | |
2621 | = this->stub_tables_.size() != 1 ? NULL : ifunc_stub_table; | |
2622 | for (typename Branches::const_iterator b = this->branch_info_.begin(); | |
2623 | b != this->branch_info_.end(); | |
2624 | b++) | |
2625 | { | |
2626 | b->make_stub(one_stub_table, ifunc_stub_table, symtab); | |
2627 | } | |
2628 | ||
9e69ed50 | 2629 | // Did anything change size? |
ec661b9d AM |
2630 | unsigned int num_huge_branches = this->branch_lookup_table_.size(); |
2631 | bool again = num_huge_branches != prev_brlt_size; | |
2632 | if (size == 64 && num_huge_branches != 0) | |
2633 | this->make_brlt_section(layout); | |
2634 | if (size == 64 && again) | |
2635 | this->brlt_section_->set_current_size(num_huge_branches); | |
2636 | ||
2637 | typedef Unordered_set<Output_section*> Output_sections; | |
2638 | Output_sections os_need_update; | |
2639 | for (typename Stub_tables::iterator p = this->stub_tables_.begin(); | |
2640 | p != this->stub_tables_.end(); | |
2641 | ++p) | |
2642 | { | |
2643 | if ((*p)->size_update()) | |
2644 | { | |
2645 | again = true; | |
9d5781f8 | 2646 | (*p)->add_eh_frame(layout); |
ec661b9d AM |
2647 | os_need_update.insert((*p)->output_section()); |
2648 | } | |
2649 | } | |
2650 | ||
9e69ed50 AM |
2651 | // Set output section offsets for all input sections in an output |
2652 | // section that just changed size. Anything past the stubs will | |
2653 | // need updating. | |
ec661b9d AM |
2654 | for (typename Output_sections::iterator p = os_need_update.begin(); |
2655 | p != os_need_update.end(); | |
2656 | p++) | |
2657 | { | |
2658 | Output_section* os = *p; | |
2659 | Address off = 0; | |
2660 | typedef Output_section::Input_section_list Input_section_list; | |
2661 | for (Input_section_list::const_iterator i = os->input_sections().begin(); | |
2662 | i != os->input_sections().end(); | |
2663 | ++i) | |
2664 | { | |
2665 | off = align_address(off, i->addralign()); | |
2666 | if (i->is_input_section() || i->is_relaxed_input_section()) | |
2667 | i->relobj()->set_section_offset(i->shndx(), off); | |
2668 | if (i->is_relaxed_input_section()) | |
2669 | { | |
2670 | Stub_table<size, big_endian>* stub_table | |
2671 | = static_cast<Stub_table<size, big_endian>*>( | |
2672 | i->relaxed_input_section()); | |
2673 | off += stub_table->set_address_and_size(os, off); | |
2674 | } | |
2675 | else | |
2676 | off += i->data_size(); | |
2677 | } | |
6830ee24 AM |
2678 | // If .branch_lt is part of this output section, then we have |
2679 | // just done the offset adjustment. | |
ec661b9d AM |
2680 | os->clear_section_offsets_need_adjustment(); |
2681 | } | |
2682 | ||
2683 | if (size == 64 | |
2684 | && !again | |
2685 | && num_huge_branches != 0 | |
2686 | && parameters->options().output_is_position_independent()) | |
2687 | { | |
2688 | // Fill in the BRLT relocs. | |
06f30c9d | 2689 | this->brlt_section_->reset_brlt_sizes(); |
ec661b9d AM |
2690 | for (typename Branch_lookup_table::const_iterator p |
2691 | = this->branch_lookup_table_.begin(); | |
2692 | p != this->branch_lookup_table_.end(); | |
2693 | ++p) | |
2694 | { | |
2695 | this->brlt_section_->add_reloc(p->first, p->second); | |
2696 | } | |
06f30c9d | 2697 | this->brlt_section_->finalize_brlt_sizes(); |
ec661b9d AM |
2698 | } |
2699 | return again; | |
2700 | } | |
2701 | ||
9d5781f8 AM |
2702 | template<int size, bool big_endian> |
2703 | void | |
2704 | Target_powerpc<size, big_endian>::do_plt_fde_location(const Output_data* plt, | |
2705 | unsigned char* oview, | |
2706 | uint64_t* paddress, | |
2707 | off_t* plen) const | |
2708 | { | |
2709 | uint64_t address = plt->address(); | |
2710 | off_t len = plt->data_size(); | |
2711 | ||
2712 | if (plt == this->glink_) | |
2713 | { | |
2714 | // See Output_data_glink::do_write() for glink contents. | |
2715 | if (size == 64) | |
2716 | { | |
2717 | // There is one word before __glink_PLTresolve | |
2718 | address += 8; | |
2719 | len -= 8; | |
2720 | } | |
2721 | else if (parameters->options().output_is_position_independent()) | |
2722 | { | |
2723 | // There are two FDEs for a position independent glink. | |
2724 | // The first covers the branch table, the second | |
2725 | // __glink_PLTresolve at the end of glink. | |
2726 | off_t resolve_size = this->glink_->pltresolve_size; | |
2727 | if (oview[9] == 0) | |
2728 | len -= resolve_size; | |
2729 | else | |
2730 | { | |
2731 | address += len - resolve_size; | |
2732 | len = resolve_size; | |
2733 | } | |
2734 | } | |
2735 | } | |
2736 | else | |
2737 | { | |
2738 | // Must be a stub table. | |
2739 | const Stub_table<size, big_endian>* stub_table | |
2740 | = static_cast<const Stub_table<size, big_endian>*>(plt); | |
2741 | uint64_t stub_address = stub_table->stub_address(); | |
2742 | len -= stub_address - address; | |
2743 | address = stub_address; | |
2744 | } | |
2745 | ||
2746 | *paddress = address; | |
2747 | *plen = len; | |
2748 | } | |
2749 | ||
42cacb20 DE |
2750 | // A class to handle the PLT data. |
2751 | ||
2752 | template<int size, bool big_endian> | |
cf43a2fe | 2753 | class Output_data_plt_powerpc : public Output_section_data_build |
42cacb20 DE |
2754 | { |
2755 | public: | |
2756 | typedef Output_data_reloc<elfcpp::SHT_RELA, true, | |
2757 | size, big_endian> Reloc_section; | |
2758 | ||
e5d5f5ed AM |
2759 | Output_data_plt_powerpc(Target_powerpc<size, big_endian>* targ, |
2760 | Reloc_section* plt_rel, | |
2761 | unsigned int reserved_size, | |
2762 | const char* name) | |
2763 | : Output_section_data_build(size == 32 ? 4 : 8), | |
2764 | rel_(plt_rel), | |
2765 | targ_(targ), | |
2766 | initial_plt_entry_size_(reserved_size), | |
2767 | name_(name) | |
2768 | { } | |
42cacb20 DE |
2769 | |
2770 | // Add an entry to the PLT. | |
03e25981 | 2771 | void |
cf43a2fe | 2772 | add_entry(Symbol*); |
42cacb20 | 2773 | |
03e25981 | 2774 | void |
e5d5f5ed AM |
2775 | add_ifunc_entry(Symbol*); |
2776 | ||
03e25981 | 2777 | void |
e5d5f5ed AM |
2778 | add_local_ifunc_entry(Sized_relobj_file<size, big_endian>*, unsigned int); |
2779 | ||
42cacb20 | 2780 | // Return the .rela.plt section data. |
e5d5f5ed | 2781 | Reloc_section* |
cf43a2fe AM |
2782 | rel_plt() const |
2783 | { | |
42cacb20 DE |
2784 | return this->rel_; |
2785 | } | |
2786 | ||
0e70b911 CC |
2787 | // Return the number of PLT entries. |
2788 | unsigned int | |
2789 | entry_count() const | |
d83ce4e3 | 2790 | { |
b3ccdeb5 AM |
2791 | if (this->current_data_size() == 0) |
2792 | return 0; | |
e5d5f5ed | 2793 | return ((this->current_data_size() - this->initial_plt_entry_size_) |
d83ce4e3 AM |
2794 | / plt_entry_size); |
2795 | } | |
0e70b911 CC |
2796 | |
2797 | // Return the offset of the first non-reserved PLT entry. | |
e5d5f5ed | 2798 | unsigned int |
0e70b911 | 2799 | first_plt_entry_offset() |
e5d5f5ed | 2800 | { return this->initial_plt_entry_size_; } |
0e70b911 CC |
2801 | |
2802 | // Return the size of a PLT entry. | |
2803 | static unsigned int | |
2804 | get_plt_entry_size() | |
cf43a2fe | 2805 | { return plt_entry_size; } |
0e70b911 | 2806 | |
42cacb20 | 2807 | protected: |
42cacb20 | 2808 | void |
cf43a2fe | 2809 | do_adjust_output_section(Output_section* os) |
42cacb20 | 2810 | { |
cf43a2fe | 2811 | os->set_entsize(0); |
42cacb20 DE |
2812 | } |
2813 | ||
6ce78956 AM |
2814 | // Write to a map file. |
2815 | void | |
2816 | do_print_to_mapfile(Mapfile* mapfile) const | |
e5d5f5ed | 2817 | { mapfile->print_output_data(this, this->name_); } |
6ce78956 | 2818 | |
cf43a2fe AM |
2819 | private: |
2820 | // The size of an entry in the PLT. | |
2821 | static const int plt_entry_size = size == 32 ? 4 : 24; | |
cf43a2fe | 2822 | |
42cacb20 DE |
2823 | // Write out the PLT data. |
2824 | void | |
2825 | do_write(Output_file*); | |
2826 | ||
2827 | // The reloc section. | |
2828 | Reloc_section* rel_; | |
cf43a2fe AM |
2829 | // Allows access to .glink for do_write. |
2830 | Target_powerpc<size, big_endian>* targ_; | |
e5d5f5ed AM |
2831 | // The size of the first reserved entry. |
2832 | int initial_plt_entry_size_; | |
2833 | // What to report in map file. | |
2834 | const char *name_; | |
42cacb20 DE |
2835 | }; |
2836 | ||
e5d5f5ed | 2837 | // Add an entry to the PLT. |
42cacb20 DE |
2838 | |
2839 | template<int size, bool big_endian> | |
03e25981 | 2840 | void |
e5d5f5ed | 2841 | Output_data_plt_powerpc<size, big_endian>::add_entry(Symbol* gsym) |
42cacb20 | 2842 | { |
e5d5f5ed AM |
2843 | if (!gsym->has_plt_offset()) |
2844 | { | |
ec661b9d | 2845 | section_size_type off = this->current_data_size(); |
e5d5f5ed AM |
2846 | if (off == 0) |
2847 | off += this->first_plt_entry_offset(); | |
2848 | gsym->set_plt_offset(off); | |
2849 | gsym->set_needs_dynsym_entry(); | |
2850 | unsigned int dynrel = elfcpp::R_POWERPC_JMP_SLOT; | |
2851 | this->rel_->add_global(gsym, dynrel, this, off, 0); | |
2852 | off += plt_entry_size; | |
2853 | this->set_current_data_size(off); | |
2854 | } | |
42cacb20 DE |
2855 | } |
2856 | ||
e5d5f5ed | 2857 | // Add an entry for a global ifunc symbol that resolves locally, to the IPLT. |
42cacb20 DE |
2858 | |
2859 | template<int size, bool big_endian> | |
03e25981 | 2860 | void |
e5d5f5ed | 2861 | Output_data_plt_powerpc<size, big_endian>::add_ifunc_entry(Symbol* gsym) |
42cacb20 | 2862 | { |
cf43a2fe AM |
2863 | if (!gsym->has_plt_offset()) |
2864 | { | |
ec661b9d | 2865 | section_size_type off = this->current_data_size(); |
cf43a2fe | 2866 | gsym->set_plt_offset(off); |
e5d5f5ed AM |
2867 | unsigned int dynrel = elfcpp::R_POWERPC_IRELATIVE; |
2868 | if (size == 64) | |
2869 | dynrel = elfcpp::R_PPC64_JMP_IREL; | |
2870 | this->rel_->add_symbolless_global_addend(gsym, dynrel, this, off, 0); | |
2871 | off += plt_entry_size; | |
2872 | this->set_current_data_size(off); | |
2873 | } | |
2874 | } | |
2875 | ||
2876 | // Add an entry for a local ifunc symbol to the IPLT. | |
2877 | ||
2878 | template<int size, bool big_endian> | |
03e25981 | 2879 | void |
e5d5f5ed AM |
2880 | Output_data_plt_powerpc<size, big_endian>::add_local_ifunc_entry( |
2881 | Sized_relobj_file<size, big_endian>* relobj, | |
2882 | unsigned int local_sym_index) | |
2883 | { | |
2884 | if (!relobj->local_has_plt_offset(local_sym_index)) | |
2885 | { | |
ec661b9d | 2886 | section_size_type off = this->current_data_size(); |
e5d5f5ed AM |
2887 | relobj->set_local_plt_offset(local_sym_index, off); |
2888 | unsigned int dynrel = elfcpp::R_POWERPC_IRELATIVE; | |
2889 | if (size == 64) | |
2890 | dynrel = elfcpp::R_PPC64_JMP_IREL; | |
2891 | this->rel_->add_symbolless_local_addend(relobj, local_sym_index, dynrel, | |
2892 | this, off, 0); | |
cf43a2fe AM |
2893 | off += plt_entry_size; |
2894 | this->set_current_data_size(off); | |
2895 | } | |
42cacb20 DE |
2896 | } |
2897 | ||
dd93cd0a | 2898 | static const uint32_t add_0_11_11 = 0x7c0b5a14; |
9e69ed50 | 2899 | static const uint32_t add_2_2_11 = 0x7c425a14; |
dd93cd0a AM |
2900 | static const uint32_t add_3_3_2 = 0x7c631214; |
2901 | static const uint32_t add_3_3_13 = 0x7c636a14; | |
2902 | static const uint32_t add_11_0_11 = 0x7d605a14; | |
2903 | static const uint32_t add_12_2_11 = 0x7d825a14; | |
9e69ed50 | 2904 | static const uint32_t add_12_12_11 = 0x7d8c5a14; |
dd93cd0a AM |
2905 | static const uint32_t addi_11_11 = 0x396b0000; |
2906 | static const uint32_t addi_12_12 = 0x398c0000; | |
2907 | static const uint32_t addi_2_2 = 0x38420000; | |
2908 | static const uint32_t addi_3_2 = 0x38620000; | |
2909 | static const uint32_t addi_3_3 = 0x38630000; | |
2910 | static const uint32_t addis_0_2 = 0x3c020000; | |
2911 | static const uint32_t addis_0_13 = 0x3c0d0000; | |
c9269dff AM |
2912 | static const uint32_t addis_11_11 = 0x3d6b0000; |
2913 | static const uint32_t addis_11_30 = 0x3d7e0000; | |
2914 | static const uint32_t addis_12_12 = 0x3d8c0000; | |
dd93cd0a AM |
2915 | static const uint32_t addis_12_2 = 0x3d820000; |
2916 | static const uint32_t addis_3_2 = 0x3c620000; | |
2917 | static const uint32_t addis_3_13 = 0x3c6d0000; | |
c9269dff AM |
2918 | static const uint32_t b = 0x48000000; |
2919 | static const uint32_t bcl_20_31 = 0x429f0005; | |
2920 | static const uint32_t bctr = 0x4e800420; | |
f3a0ed29 | 2921 | static const uint32_t blr = 0x4e800020; |
c9269dff | 2922 | static const uint32_t blrl = 0x4e800021; |
9e69ed50 AM |
2923 | static const uint32_t bnectr_p4 = 0x4ce20420; |
2924 | static const uint32_t cmpldi_2_0 = 0x28220000; | |
dd93cd0a AM |
2925 | static const uint32_t cror_15_15_15 = 0x4def7b82; |
2926 | static const uint32_t cror_31_31_31 = 0x4ffffb82; | |
f3a0ed29 AM |
2927 | static const uint32_t ld_0_1 = 0xe8010000; |
2928 | static const uint32_t ld_0_12 = 0xe80c0000; | |
dd93cd0a AM |
2929 | static const uint32_t ld_11_12 = 0xe96c0000; |
2930 | static const uint32_t ld_11_2 = 0xe9620000; | |
2931 | static const uint32_t ld_2_1 = 0xe8410000; | |
2932 | static const uint32_t ld_2_11 = 0xe84b0000; | |
2933 | static const uint32_t ld_2_12 = 0xe84c0000; | |
2934 | static const uint32_t ld_2_2 = 0xe8420000; | |
f3a0ed29 | 2935 | static const uint32_t lfd_0_1 = 0xc8010000; |
dd93cd0a | 2936 | static const uint32_t li_0_0 = 0x38000000; |
f3a0ed29 | 2937 | static const uint32_t li_12_0 = 0x39800000; |
dd93cd0a | 2938 | static const uint32_t lis_0_0 = 0x3c000000; |
c9269dff AM |
2939 | static const uint32_t lis_11 = 0x3d600000; |
2940 | static const uint32_t lis_12 = 0x3d800000; | |
c9269dff AM |
2941 | static const uint32_t lwz_0_12 = 0x800c0000; |
2942 | static const uint32_t lwz_11_11 = 0x816b0000; | |
2943 | static const uint32_t lwz_11_30 = 0x817e0000; | |
2944 | static const uint32_t lwz_12_12 = 0x818c0000; | |
dd93cd0a | 2945 | static const uint32_t lwzu_0_12 = 0x840c0000; |
f3a0ed29 | 2946 | static const uint32_t lvx_0_12_0 = 0x7c0c00ce; |
c9269dff | 2947 | static const uint32_t mflr_0 = 0x7c0802a6; |
dd93cd0a | 2948 | static const uint32_t mflr_11 = 0x7d6802a6; |
c9269dff AM |
2949 | static const uint32_t mflr_12 = 0x7d8802a6; |
2950 | static const uint32_t mtctr_0 = 0x7c0903a6; | |
2951 | static const uint32_t mtctr_11 = 0x7d6903a6; | |
ec661b9d | 2952 | static const uint32_t mtctr_12 = 0x7d8903a6; |
c9269dff | 2953 | static const uint32_t mtlr_0 = 0x7c0803a6; |
c9269dff | 2954 | static const uint32_t mtlr_12 = 0x7d8803a6; |
dd93cd0a | 2955 | static const uint32_t nop = 0x60000000; |
c9269dff | 2956 | static const uint32_t ori_0_0_0 = 0x60000000; |
f3a0ed29 AM |
2957 | static const uint32_t std_0_1 = 0xf8010000; |
2958 | static const uint32_t std_0_12 = 0xf80c0000; | |
dd93cd0a | 2959 | static const uint32_t std_2_1 = 0xf8410000; |
f3a0ed29 AM |
2960 | static const uint32_t stfd_0_1 = 0xd8010000; |
2961 | static const uint32_t stvx_0_12_0 = 0x7c0c01ce; | |
dd93cd0a | 2962 | static const uint32_t sub_11_11_12 = 0x7d6c5850; |
9e69ed50 | 2963 | static const uint32_t xor_11_11_11 = 0x7d6b5a78; |
42cacb20 DE |
2964 | |
2965 | // Write out the PLT. | |
2966 | ||
2967 | template<int size, bool big_endian> | |
2968 | void | |
2969 | Output_data_plt_powerpc<size, big_endian>::do_write(Output_file* of) | |
2970 | { | |
b3ccdeb5 | 2971 | if (size == 32 && this->name_[3] != 'I') |
cf43a2fe | 2972 | { |
ec661b9d | 2973 | const section_size_type offset = this->offset(); |
cf43a2fe AM |
2974 | const section_size_type oview_size |
2975 | = convert_to_section_size_type(this->data_size()); | |
2976 | unsigned char* const oview = of->get_output_view(offset, oview_size); | |
2977 | unsigned char* pov = oview; | |
2978 | unsigned char* endpov = oview + oview_size; | |
2979 | ||
e5d5f5ed | 2980 | // The address of the .glink branch table |
cf43a2fe AM |
2981 | const Output_data_glink<size, big_endian>* glink |
2982 | = this->targ_->glink_section(); | |
ec661b9d | 2983 | elfcpp::Elf_types<32>::Elf_Addr branch_tab = glink->address(); |
cf43a2fe AM |
2984 | |
2985 | while (pov < endpov) | |
2986 | { | |
2987 | elfcpp::Swap<32, big_endian>::writeval(pov, branch_tab); | |
2988 | pov += 4; | |
2989 | branch_tab += 4; | |
2990 | } | |
2991 | ||
2992 | of->write_output_view(offset, oview_size, oview); | |
2993 | } | |
2994 | } | |
2995 | ||
2996 | // Create the PLT section. | |
2997 | ||
2998 | template<int size, bool big_endian> | |
2999 | void | |
40b469d7 AM |
3000 | Target_powerpc<size, big_endian>::make_plt_section(Symbol_table* symtab, |
3001 | Layout* layout) | |
cf43a2fe AM |
3002 | { |
3003 | if (this->plt_ == NULL) | |
3004 | { | |
40b469d7 AM |
3005 | if (this->got_ == NULL) |
3006 | this->got_section(symtab, layout); | |
3007 | ||
cf43a2fe AM |
3008 | if (this->glink_ == NULL) |
3009 | make_glink_section(layout); | |
3010 | ||
3011 | // Ensure that .rela.dyn always appears before .rela.plt This is | |
3012 | // necessary due to how, on PowerPC and some other targets, .rela.dyn | |
b3ccdeb5 | 3013 | // needs to include .rela.plt in its range. |
cf43a2fe AM |
3014 | this->rela_dyn_section(layout); |
3015 | ||
e5d5f5ed AM |
3016 | Reloc_section* plt_rel = new Reloc_section(false); |
3017 | layout->add_output_section_data(".rela.plt", elfcpp::SHT_RELA, | |
3018 | elfcpp::SHF_ALLOC, plt_rel, | |
3019 | ORDER_DYNAMIC_PLT_RELOCS, false); | |
3020 | this->plt_ | |
3021 | = new Output_data_plt_powerpc<size, big_endian>(this, plt_rel, | |
3022 | size == 32 ? 0 : 24, | |
3023 | "** PLT"); | |
cf43a2fe AM |
3024 | layout->add_output_section_data(".plt", |
3025 | (size == 32 | |
3026 | ? elfcpp::SHT_PROGBITS | |
3027 | : elfcpp::SHT_NOBITS), | |
3028 | elfcpp::SHF_ALLOC | elfcpp::SHF_WRITE, | |
3029 | this->plt_, | |
3030 | (size == 32 | |
3031 | ? ORDER_SMALL_DATA | |
3032 | : ORDER_SMALL_BSS), | |
3033 | false); | |
3034 | } | |
3035 | } | |
3036 | ||
e5d5f5ed AM |
3037 | // Create the IPLT section. |
3038 | ||
3039 | template<int size, bool big_endian> | |
3040 | void | |
40b469d7 AM |
3041 | Target_powerpc<size, big_endian>::make_iplt_section(Symbol_table* symtab, |
3042 | Layout* layout) | |
e5d5f5ed AM |
3043 | { |
3044 | if (this->iplt_ == NULL) | |
3045 | { | |
40b469d7 | 3046 | this->make_plt_section(symtab, layout); |
e5d5f5ed AM |
3047 | |
3048 | Reloc_section* iplt_rel = new Reloc_section(false); | |
3049 | this->rela_dyn_->output_section()->add_output_section_data(iplt_rel); | |
3050 | this->iplt_ | |
3051 | = new Output_data_plt_powerpc<size, big_endian>(this, iplt_rel, | |
3052 | 0, "** IPLT"); | |
3053 | this->plt_->output_section()->add_output_section_data(this->iplt_); | |
e5d5f5ed AM |
3054 | } |
3055 | } | |
3056 | ||
ec661b9d | 3057 | // A section for huge long branch addresses, similar to plt section. |
cf43a2fe AM |
3058 | |
3059 | template<int size, bool big_endian> | |
ec661b9d | 3060 | class Output_data_brlt_powerpc : public Output_section_data_build |
cf43a2fe AM |
3061 | { |
3062 | public: | |
ec661b9d AM |
3063 | typedef typename elfcpp::Elf_types<size>::Elf_Addr Address; |
3064 | typedef Output_data_reloc<elfcpp::SHT_RELA, true, | |
3065 | size, big_endian> Reloc_section; | |
c9269dff | 3066 | |
ec661b9d AM |
3067 | Output_data_brlt_powerpc(Target_powerpc<size, big_endian>* targ, |
3068 | Reloc_section* brlt_rel) | |
3069 | : Output_section_data_build(size == 32 ? 4 : 8), | |
3070 | rel_(brlt_rel), | |
3071 | targ_(targ) | |
3072 | { } | |
cf43a2fe | 3073 | |
06f30c9d CC |
3074 | void |
3075 | reset_brlt_sizes() | |
3076 | { | |
3077 | this->reset_data_size(); | |
3078 | this->rel_->reset_data_size(); | |
3079 | } | |
3080 | ||
3081 | void | |
3082 | finalize_brlt_sizes() | |
3083 | { | |
3084 | this->finalize_data_size(); | |
3085 | this->rel_->finalize_data_size(); | |
3086 | } | |
3087 | ||
ec661b9d | 3088 | // Add a reloc for an entry in the BRLT. |
cf43a2fe | 3089 | void |
ec661b9d AM |
3090 | add_reloc(Address to, unsigned int off) |
3091 | { this->rel_->add_relative(elfcpp::R_POWERPC_RELATIVE, this, off, to); } | |
e5d5f5ed | 3092 | |
ec661b9d | 3093 | // Update section and reloc section size. |
e5d5f5ed | 3094 | void |
ec661b9d AM |
3095 | set_current_size(unsigned int num_branches) |
3096 | { | |
3097 | this->reset_address_and_file_offset(); | |
3098 | this->set_current_data_size(num_branches * 16); | |
3099 | this->finalize_data_size(); | |
3100 | Output_section* os = this->output_section(); | |
3101 | os->set_section_offsets_need_adjustment(); | |
3102 | if (this->rel_ != NULL) | |
3103 | { | |
3104 | unsigned int reloc_size | |
3105 | = Reloc_types<elfcpp::SHT_RELA, size, big_endian>::reloc_size; | |
3106 | this->rel_->reset_address_and_file_offset(); | |
3107 | this->rel_->set_current_data_size(num_branches * reloc_size); | |
3108 | this->rel_->finalize_data_size(); | |
3109 | Output_section* os = this->rel_->output_section(); | |
3110 | os->set_section_offsets_need_adjustment(); | |
3111 | } | |
3112 | } | |
cf43a2fe | 3113 | |
ec661b9d AM |
3114 | protected: |
3115 | void | |
3116 | do_adjust_output_section(Output_section* os) | |
3117 | { | |
3118 | os->set_entsize(0); | |
3119 | } | |
e5d5f5ed | 3120 | |
ec661b9d AM |
3121 | // Write to a map file. |
3122 | void | |
3123 | do_print_to_mapfile(Mapfile* mapfile) const | |
3124 | { mapfile->print_output_data(this, "** BRLT"); } | |
c9824451 | 3125 | |
ec661b9d AM |
3126 | private: |
3127 | // Write out the BRLT data. | |
3128 | void | |
3129 | do_write(Output_file*); | |
c9824451 | 3130 | |
ec661b9d AM |
3131 | // The reloc section. |
3132 | Reloc_section* rel_; | |
3133 | Target_powerpc<size, big_endian>* targ_; | |
3134 | }; | |
cf43a2fe | 3135 | |
ec661b9d AM |
3136 | // Make the branch lookup table section. |
3137 | ||
3138 | template<int size, bool big_endian> | |
3139 | void | |
3140 | Target_powerpc<size, big_endian>::make_brlt_section(Layout* layout) | |
3141 | { | |
3142 | if (size == 64 && this->brlt_section_ == NULL) | |
3143 | { | |
3144 | Reloc_section* brlt_rel = NULL; | |
3145 | bool is_pic = parameters->options().output_is_position_independent(); | |
3146 | if (is_pic) | |
3147 | { | |
6830ee24 AM |
3148 | // When PIC we can't fill in .branch_lt (like .plt it can be |
3149 | // a bss style section) but must initialise at runtime via | |
ec661b9d AM |
3150 | // dynamic relocats. |
3151 | this->rela_dyn_section(layout); | |
3152 | brlt_rel = new Reloc_section(false); | |
3153 | this->rela_dyn_->output_section()->add_output_section_data(brlt_rel); | |
3154 | } | |
3155 | this->brlt_section_ | |
3156 | = new Output_data_brlt_powerpc<size, big_endian>(this, brlt_rel); | |
3157 | if (this->plt_ && is_pic) | |
3158 | this->plt_->output_section() | |
3159 | ->add_output_section_data(this->brlt_section_); | |
3160 | else | |
6830ee24 | 3161 | layout->add_output_section_data(".branch_lt", |
ec661b9d AM |
3162 | (is_pic ? elfcpp::SHT_NOBITS |
3163 | : elfcpp::SHT_PROGBITS), | |
3164 | elfcpp::SHF_ALLOC | elfcpp::SHF_WRITE, | |
3165 | this->brlt_section_, | |
3166 | (is_pic ? ORDER_SMALL_BSS | |
3167 | : ORDER_SMALL_DATA), | |
3168 | false); | |
3169 | } | |
3170 | } | |
3171 | ||
6830ee24 | 3172 | // Write out .branch_lt when non-PIC. |
ec661b9d AM |
3173 | |
3174 | template<int size, bool big_endian> | |
3175 | void | |
3176 | Output_data_brlt_powerpc<size, big_endian>::do_write(Output_file* of) | |
3177 | { | |
3178 | if (size == 64 && !parameters->options().output_is_position_independent()) | |
3179 | { | |
3180 | const section_size_type offset = this->offset(); | |
3181 | const section_size_type oview_size | |
3182 | = convert_to_section_size_type(this->data_size()); | |
3183 | unsigned char* const oview = of->get_output_view(offset, oview_size); | |
3184 | ||
3185 | this->targ_->write_branch_lookup_table(oview); | |
3186 | of->write_output_view(offset, oview_size, oview); | |
3187 | } | |
3188 | } | |
3189 | ||
9e69ed50 AM |
3190 | static inline uint32_t |
3191 | l(uint32_t a) | |
3192 | { | |
3193 | return a & 0xffff; | |
3194 | } | |
3195 | ||
3196 | static inline uint32_t | |
3197 | hi(uint32_t a) | |
3198 | { | |
3199 | return l(a >> 16); | |
3200 | } | |
3201 | ||
3202 | static inline uint32_t | |
3203 | ha(uint32_t a) | |
3204 | { | |
3205 | return hi(a + 0x8000); | |
3206 | } | |
3207 | ||
9d5781f8 AM |
3208 | template<int size> |
3209 | struct Eh_cie | |
3210 | { | |
3211 | static const unsigned char eh_frame_cie[12]; | |
3212 | }; | |
3213 | ||
3214 | template<int size> | |
3215 | const unsigned char Eh_cie<size>::eh_frame_cie[] = | |
3216 | { | |
3217 | 1, // CIE version. | |
3218 | 'z', 'R', 0, // Augmentation string. | |
3219 | 4, // Code alignment. | |
3220 | 0x80 - size / 8 , // Data alignment. | |
3221 | 65, // RA reg. | |
3222 | 1, // Augmentation size. | |
3223 | (elfcpp::DW_EH_PE_pcrel | |
3224 | | elfcpp::DW_EH_PE_sdata4), // FDE encoding. | |
3225 | elfcpp::DW_CFA_def_cfa, 1, 0 // def_cfa: r1 offset 0. | |
3226 | }; | |
3227 | ||
3228 | // Describe __glink_PLTresolve use of LR, 64-bit version. | |
3229 | static const unsigned char glink_eh_frame_fde_64[] = | |
3230 | { | |
3231 | 0, 0, 0, 0, // Replaced with offset to .glink. | |
3232 | 0, 0, 0, 0, // Replaced with size of .glink. | |
3233 | 0, // Augmentation size. | |
3234 | elfcpp::DW_CFA_advance_loc + 1, | |
3235 | elfcpp::DW_CFA_register, 65, 12, | |
3236 | elfcpp::DW_CFA_advance_loc + 4, | |
3237 | elfcpp::DW_CFA_restore_extended, 65 | |
3238 | }; | |
3239 | ||
3240 | // Describe __glink_PLTresolve use of LR, 32-bit version. | |
3241 | static const unsigned char glink_eh_frame_fde_32[] = | |
3242 | { | |
3243 | 0, 0, 0, 0, // Replaced with offset to .glink. | |
3244 | 0, 0, 0, 0, // Replaced with size of .glink. | |
3245 | 0, // Augmentation size. | |
3246 | elfcpp::DW_CFA_advance_loc + 2, | |
3247 | elfcpp::DW_CFA_register, 65, 0, | |
3248 | elfcpp::DW_CFA_advance_loc + 4, | |
3249 | elfcpp::DW_CFA_restore_extended, 65 | |
3250 | }; | |
3251 | ||
3252 | static const unsigned char default_fde[] = | |
3253 | { | |
3254 | 0, 0, 0, 0, // Replaced with offset to stubs. | |
3255 | 0, 0, 0, 0, // Replaced with size of stubs. | |
3256 | 0, // Augmentation size. | |
3257 | elfcpp::DW_CFA_nop, // Pad. | |
3258 | elfcpp::DW_CFA_nop, | |
3259 | elfcpp::DW_CFA_nop | |
3260 | }; | |
3261 | ||
9e69ed50 AM |
3262 | template<bool big_endian> |
3263 | static inline void | |
3264 | write_insn(unsigned char* p, uint32_t v) | |
3265 | { | |
3266 | elfcpp::Swap<32, big_endian>::writeval(p, v); | |
3267 | } | |
3268 | ||
ec661b9d AM |
3269 | // Stub_table holds information about plt and long branch stubs. |
3270 | // Stubs are built in an area following some input section determined | |
3271 | // by group_sections(). This input section is converted to a relaxed | |
3272 | // input section allowing it to be resized to accommodate the stubs | |
3273 | ||
3274 | template<int size, bool big_endian> | |
3275 | class Stub_table : public Output_relaxed_input_section | |
3276 | { | |
3277 | public: | |
3278 | typedef typename elfcpp::Elf_types<size>::Elf_Addr Address; | |
3279 | static const Address invalid_address = static_cast<Address>(0) - 1; | |
3280 | ||
3281 | Stub_table(Target_powerpc<size, big_endian>* targ) | |
3282 | : Output_relaxed_input_section(NULL, 0, 0), | |
3283 | targ_(targ), plt_call_stubs_(), long_branch_stubs_(), | |
9e69ed50 | 3284 | orig_data_size_(0), plt_size_(0), last_plt_size_(0), |
9d5781f8 | 3285 | branch_size_(0), last_branch_size_(0), eh_frame_added_(false) |
ec661b9d AM |
3286 | { } |
3287 | ||
3288 | // Delayed Output_relaxed_input_section init. | |
3289 | void | |
3290 | init(const Output_section::Input_section*, Output_section*); | |
3291 | ||
3292 | // Add a plt call stub. | |
3293 | void | |
3294 | add_plt_call_entry(const Sized_relobj_file<size, big_endian>*, | |
3295 | const Symbol*, | |
3296 | unsigned int, | |
3297 | Address); | |
3298 | ||
3299 | void | |
3300 | add_plt_call_entry(const Sized_relobj_file<size, big_endian>*, | |
3301 | unsigned int, | |
3302 | unsigned int, | |
3303 | Address); | |
3304 | ||
3305 | // Find a given plt call stub. | |
3306 | Address | |
3307 | find_plt_call_entry(const Symbol*) const; | |
3308 | ||
3309 | Address | |
3310 | find_plt_call_entry(const Sized_relobj_file<size, big_endian>*, | |
3311 | unsigned int) const; | |
3312 | ||
3313 | Address | |
3314 | find_plt_call_entry(const Sized_relobj_file<size, big_endian>*, | |
3315 | const Symbol*, | |
3316 | unsigned int, | |
3317 | Address) const; | |
3318 | ||
3319 | Address | |
3320 | find_plt_call_entry(const Sized_relobj_file<size, big_endian>*, | |
3321 | unsigned int, | |
3322 | unsigned int, | |
3323 | Address) const; | |
3324 | ||
3325 | // Add a long branch stub. | |
3326 | void | |
3327 | add_long_branch_entry(const Powerpc_relobj<size, big_endian>*, Address); | |
3328 | ||
3329 | Address | |
9d5781f8 AM |
3330 | find_long_branch_entry(const Powerpc_relobj<size, big_endian>*, |
3331 | Address) const; | |
ec661b9d AM |
3332 | |
3333 | void | |
9e69ed50 | 3334 | clear_stubs() |
cf43a2fe | 3335 | { |
9e69ed50 AM |
3336 | this->plt_call_stubs_.clear(); |
3337 | this->plt_size_ = 0; | |
ec661b9d AM |
3338 | this->long_branch_stubs_.clear(); |
3339 | this->branch_size_ = 0; | |
cf43a2fe AM |
3340 | } |
3341 | ||
ec661b9d AM |
3342 | Address |
3343 | set_address_and_size(const Output_section* os, Address off) | |
cf43a2fe | 3344 | { |
ec661b9d AM |
3345 | Address start_off = off; |
3346 | off += this->orig_data_size_; | |
3347 | Address my_size = this->plt_size_ + this->branch_size_; | |
3348 | if (my_size != 0) | |
3349 | off = align_address(off, this->stub_align()); | |
3350 | // Include original section size and alignment padding in size | |
3351 | my_size += off - start_off; | |
3352 | this->reset_address_and_file_offset(); | |
3353 | this->set_current_data_size(my_size); | |
3354 | this->set_address_and_file_offset(os->address() + start_off, | |
3355 | os->offset() + start_off); | |
3356 | return my_size; | |
cf43a2fe AM |
3357 | } |
3358 | ||
ec661b9d | 3359 | Address |
9d5781f8 | 3360 | stub_address() const |
ec661b9d AM |
3361 | { |
3362 | return align_address(this->address() + this->orig_data_size_, | |
3363 | this->stub_align()); | |
3364 | } | |
3365 | ||
3366 | Address | |
9d5781f8 | 3367 | stub_offset() const |
ec661b9d AM |
3368 | { |
3369 | return align_address(this->offset() + this->orig_data_size_, | |
3370 | this->stub_align()); | |
3371 | } | |
3372 | ||
3373 | section_size_type | |
3374 | plt_size() const | |
3375 | { return this->plt_size_; } | |
3376 | ||
3377 | bool | |
3378 | size_update() | |
3379 | { | |
3380 | Output_section* os = this->output_section(); | |
3381 | if (os->addralign() < this->stub_align()) | |
3382 | { | |
3383 | os->set_addralign(this->stub_align()); | |
3384 | // FIXME: get rid of the insane checkpointing. | |
3385 | // We can't increase alignment of the input section to which | |
3386 | // stubs are attached; The input section may be .init which | |
3387 | // is pasted together with other .init sections to form a | |
3388 | // function. Aligning might insert zero padding resulting in | |
3389 | // sigill. However we do need to increase alignment of the | |
3390 | // output section so that the align_address() on offset in | |
3391 | // set_address_and_size() adds the same padding as the | |
3392 | // align_address() on address in stub_address(). | |
3393 | // What's more, we need this alignment for the layout done in | |
3394 | // relaxation_loop_body() so that the output section starts at | |
3395 | // a suitably aligned address. | |
3396 | os->checkpoint_set_addralign(this->stub_align()); | |
3397 | } | |
9e69ed50 AM |
3398 | if (this->last_plt_size_ != this->plt_size_ |
3399 | || this->last_branch_size_ != this->branch_size_) | |
ec661b9d | 3400 | { |
9e69ed50 AM |
3401 | this->last_plt_size_ = this->plt_size_; |
3402 | this->last_branch_size_ = this->branch_size_; | |
ec661b9d AM |
3403 | return true; |
3404 | } | |
3405 | return false; | |
3406 | } | |
3407 | ||
9d5781f8 AM |
3408 | // Add .eh_frame info for this stub section. Unlike other linker |
3409 | // generated .eh_frame this is added late in the link, because we | |
3410 | // only want the .eh_frame info if this particular stub section is | |
3411 | // non-empty. | |
3412 | void | |
3413 | add_eh_frame(Layout* layout) | |
3414 | { | |
3415 | if (!this->eh_frame_added_) | |
3416 | { | |
3417 | if (!parameters->options().ld_generated_unwind_info()) | |
3418 | return; | |
3419 | ||
3420 | // Since we add stub .eh_frame info late, it must be placed | |
3421 | // after all other linker generated .eh_frame info so that | |
3422 | // merge mapping need not be updated for input sections. | |
3423 | // There is no provision to use a different CIE to that used | |
3424 | // by .glink. | |
3425 | if (!this->targ_->has_glink()) | |
3426 | return; | |
3427 | ||
3428 | layout->add_eh_frame_for_plt(this, | |
3429 | Eh_cie<size>::eh_frame_cie, | |
3430 | sizeof (Eh_cie<size>::eh_frame_cie), | |
3431 | default_fde, | |
3432 | sizeof (default_fde)); | |
3433 | this->eh_frame_added_ = true; | |
3434 | } | |
3435 | } | |
3436 | ||
ec661b9d AM |
3437 | Target_powerpc<size, big_endian>* |
3438 | targ() const | |
3439 | { return targ_; } | |
6ce78956 | 3440 | |
cf43a2fe | 3441 | private: |
9e69ed50 AM |
3442 | class Plt_stub_ent; |
3443 | class Plt_stub_ent_hash; | |
3444 | typedef Unordered_map<Plt_stub_ent, unsigned int, | |
3445 | Plt_stub_ent_hash> Plt_stub_entries; | |
3446 | ||
3447 | // Alignment of stub section. | |
ec661b9d | 3448 | unsigned int |
9e69ed50 AM |
3449 | stub_align() const |
3450 | { | |
3451 | if (size == 32) | |
3452 | return 16; | |
3453 | unsigned int min_align = 32; | |
3454 | unsigned int user_align = 1 << parameters->options().plt_align(); | |
3455 | return std::max(user_align, min_align); | |
3456 | } | |
cf43a2fe | 3457 | |
91c2b899 AM |
3458 | // Return the plt offset for the given call stub. |
3459 | Address | |
3460 | plt_off(typename Plt_stub_entries::const_iterator p, bool* is_iplt) const | |
3461 | { | |
3462 | const Symbol* gsym = p->first.sym_; | |
3463 | if (gsym != NULL) | |
3464 | { | |
3465 | *is_iplt = (gsym->type() == elfcpp::STT_GNU_IFUNC | |
3466 | && gsym->can_use_relative_reloc(false)); | |
3467 | return gsym->plt_offset(); | |
3468 | } | |
3469 | else | |
3470 | { | |
3471 | *is_iplt = true; | |
3472 | const Sized_relobj_file<size, big_endian>* relobj = p->first.object_; | |
3473 | unsigned int local_sym_index = p->first.locsym_; | |
3474 | return relobj->local_plt_offset(local_sym_index); | |
3475 | } | |
3476 | } | |
3477 | ||
9e69ed50 | 3478 | // Size of a given plt call stub. |
ec661b9d | 3479 | unsigned int |
9e69ed50 AM |
3480 | plt_call_size(typename Plt_stub_entries::const_iterator p) const |
3481 | { | |
3482 | if (size == 32) | |
3483 | return 16; | |
3484 | ||
91c2b899 AM |
3485 | bool is_iplt; |
3486 | Address plt_addr = this->plt_off(p, &is_iplt); | |
3487 | if (is_iplt) | |
3488 | plt_addr += this->targ_->iplt_section()->address(); | |
9e69ed50 | 3489 | else |
91c2b899 AM |
3490 | plt_addr += this->targ_->plt_section()->address(); |
3491 | Address got_addr = this->targ_->got_section()->output_section()->address(); | |
9e69ed50 AM |
3492 | const Powerpc_relobj<size, big_endian>* ppcobj = static_cast |
3493 | <const Powerpc_relobj<size, big_endian>*>(p->first.object_); | |
91c2b899 AM |
3494 | got_addr += ppcobj->toc_base_offset(); |
3495 | Address off = plt_addr - got_addr; | |
9e69ed50 AM |
3496 | bool static_chain = parameters->options().plt_static_chain(); |
3497 | bool thread_safe = this->targ_->plt_thread_safe(); | |
3498 | unsigned int bytes = (4 * 5 | |
3499 | + 4 * static_chain | |
3500 | + 8 * thread_safe | |
3501 | + 4 * (ha(off) != 0) | |
3502 | + 4 * (ha(off + 8 + 8 * static_chain) != ha(off))); | |
3503 | unsigned int align = 1 << parameters->options().plt_align(); | |
3504 | if (align > 1) | |
3505 | bytes = (bytes + align - 1) & -align; | |
3506 | return bytes; | |
3507 | } | |
ec661b9d AM |
3508 | |
3509 | // Return long branch stub size. | |
3510 | unsigned int | |
3511 | branch_stub_size(Address to) | |
3512 | { | |
9e69ed50 AM |
3513 | Address loc |
3514 | = this->stub_address() + this->last_plt_size_ + this->branch_size_; | |
3515 | if (to - loc + (1 << 25) < 2 << 25) | |
ec661b9d AM |
3516 | return 4; |
3517 | if (size == 64 || !parameters->options().output_is_position_independent()) | |
3518 | return 16; | |
3519 | return 32; | |
3520 | } | |
3521 | ||
3522 | // Write out stubs. | |
cf43a2fe AM |
3523 | void |
3524 | do_write(Output_file*); | |
3525 | ||
ec661b9d AM |
3526 | // Plt call stub keys. |
3527 | class Plt_stub_ent | |
cf43a2fe | 3528 | { |
d1a8cabd | 3529 | public: |
ec661b9d | 3530 | Plt_stub_ent(const Symbol* sym) |
c9824451 AM |
3531 | : sym_(sym), object_(0), addend_(0), locsym_(0) |
3532 | { } | |
3533 | ||
ec661b9d AM |
3534 | Plt_stub_ent(const Sized_relobj_file<size, big_endian>* object, |
3535 | unsigned int locsym_index) | |
c9824451 AM |
3536 | : sym_(NULL), object_(object), addend_(0), locsym_(locsym_index) |
3537 | { } | |
3538 | ||
ec661b9d AM |
3539 | Plt_stub_ent(const Sized_relobj_file<size, big_endian>* object, |
3540 | const Symbol* sym, | |
3541 | unsigned int r_type, | |
3542 | Address addend) | |
e5d5f5ed | 3543 | : sym_(sym), object_(0), addend_(0), locsym_(0) |
cf43a2fe AM |
3544 | { |
3545 | if (size != 32) | |
ec661b9d | 3546 | this->addend_ = addend; |
d1a8cabd | 3547 | else if (parameters->options().output_is_position_independent() |
ec661b9d | 3548 | && r_type == elfcpp::R_PPC_PLTREL24) |
cf43a2fe | 3549 | { |
ec661b9d | 3550 | this->addend_ = addend; |
e5d5f5ed | 3551 | if (this->addend_ >= 32768) |
d1a8cabd | 3552 | this->object_ = object; |
cf43a2fe AM |
3553 | } |
3554 | } | |
3555 | ||
ec661b9d AM |
3556 | Plt_stub_ent(const Sized_relobj_file<size, big_endian>* object, |
3557 | unsigned int locsym_index, | |
3558 | unsigned int r_type, | |
3559 | Address addend) | |
e5d5f5ed AM |
3560 | : sym_(NULL), object_(object), addend_(0), locsym_(locsym_index) |
3561 | { | |
3562 | if (size != 32) | |
ec661b9d | 3563 | this->addend_ = addend; |
e5d5f5ed | 3564 | else if (parameters->options().output_is_position_independent() |
ec661b9d AM |
3565 | && r_type == elfcpp::R_PPC_PLTREL24) |
3566 | this->addend_ = addend; | |
e5d5f5ed AM |
3567 | } |
3568 | ||
ec661b9d | 3569 | bool operator==(const Plt_stub_ent& that) const |
cf43a2fe AM |
3570 | { |
3571 | return (this->sym_ == that.sym_ | |
3572 | && this->object_ == that.object_ | |
e5d5f5ed AM |
3573 | && this->addend_ == that.addend_ |
3574 | && this->locsym_ == that.locsym_); | |
cf43a2fe | 3575 | } |
c9269dff AM |
3576 | |
3577 | const Symbol* sym_; | |
e5d5f5ed AM |
3578 | const Sized_relobj_file<size, big_endian>* object_; |
3579 | typename elfcpp::Elf_types<size>::Elf_Addr addend_; | |
3580 | unsigned int locsym_; | |
cf43a2fe AM |
3581 | }; |
3582 | ||
ec661b9d | 3583 | class Plt_stub_ent_hash |
cf43a2fe | 3584 | { |
d1a8cabd | 3585 | public: |
ec661b9d | 3586 | size_t operator()(const Plt_stub_ent& ent) const |
cf43a2fe AM |
3587 | { |
3588 | return (reinterpret_cast<uintptr_t>(ent.sym_) | |
3589 | ^ reinterpret_cast<uintptr_t>(ent.object_) | |
e5d5f5ed AM |
3590 | ^ ent.addend_ |
3591 | ^ ent.locsym_); | |
cf43a2fe | 3592 | } |
ec661b9d AM |
3593 | }; |
3594 | ||
3595 | // Long branch stub keys. | |
3596 | class Branch_stub_ent | |
3597 | { | |
3598 | public: | |
3599 | Branch_stub_ent(const Powerpc_relobj<size, big_endian>* obj, Address to) | |
3600 | : dest_(to), toc_base_off_(0) | |
3601 | { | |
3602 | if (size == 64) | |
3603 | toc_base_off_ = obj->toc_base_offset(); | |
3604 | } | |
3605 | ||
3606 | bool operator==(const Branch_stub_ent& that) const | |
3607 | { | |
3608 | return (this->dest_ == that.dest_ | |
3609 | && (size == 32 | |
3610 | || this->toc_base_off_ == that.toc_base_off_)); | |
3611 | } | |
cf43a2fe | 3612 | |
ec661b9d AM |
3613 | Address dest_; |
3614 | unsigned int toc_base_off_; | |
3615 | }; | |
cf43a2fe | 3616 | |
ec661b9d AM |
3617 | class Branch_stub_ent_hash |
3618 | { | |
3619 | public: | |
3620 | size_t operator()(const Branch_stub_ent& ent) const | |
3621 | { return ent.dest_ ^ ent.toc_base_off_; } | |
3622 | }; | |
cf43a2fe | 3623 | |
ec661b9d | 3624 | // In a sane world this would be a global. |
cf43a2fe | 3625 | Target_powerpc<size, big_endian>* targ_; |
ec661b9d | 3626 | // Map sym/object/addend to stub offset. |
ec661b9d AM |
3627 | Plt_stub_entries plt_call_stubs_; |
3628 | // Map destination address to stub offset. | |
3629 | typedef Unordered_map<Branch_stub_ent, unsigned int, | |
3630 | Branch_stub_ent_hash> Branch_stub_entries; | |
3631 | Branch_stub_entries long_branch_stubs_; | |
3632 | // size of input section | |
3633 | section_size_type orig_data_size_; | |
3634 | // size of stubs | |
9e69ed50 | 3635 | section_size_type plt_size_, last_plt_size_, branch_size_, last_branch_size_; |
9d5781f8 AM |
3636 | // Whether .eh_frame info has been created for this stub section. |
3637 | bool eh_frame_added_; | |
cf43a2fe AM |
3638 | }; |
3639 | ||
ec661b9d AM |
3640 | // Make a new stub table, and record. |
3641 | ||
3642 | template<int size, bool big_endian> | |
3643 | Stub_table<size, big_endian>* | |
3644 | Target_powerpc<size, big_endian>::new_stub_table() | |
3645 | { | |
3646 | Stub_table<size, big_endian>* stub_table | |
3647 | = new Stub_table<size, big_endian>(this); | |
3648 | this->stub_tables_.push_back(stub_table); | |
3649 | return stub_table; | |
3650 | } | |
3651 | ||
3652 | // Delayed stub table initialisation, because we create the stub table | |
3653 | // before we know to which section it will be attached. | |
cf43a2fe AM |
3654 | |
3655 | template<int size, bool big_endian> | |
ec661b9d AM |
3656 | void |
3657 | Stub_table<size, big_endian>::init( | |
3658 | const Output_section::Input_section* owner, | |
3659 | Output_section* output_section) | |
cf43a2fe | 3660 | { |
ec661b9d AM |
3661 | this->set_relobj(owner->relobj()); |
3662 | this->set_shndx(owner->shndx()); | |
3663 | this->set_addralign(this->relobj()->section_addralign(this->shndx())); | |
3664 | this->set_output_section(output_section); | |
3665 | this->orig_data_size_ = owner->current_data_size(); | |
3666 | ||
3667 | std::vector<Output_relaxed_input_section*> new_relaxed; | |
3668 | new_relaxed.push_back(this); | |
3669 | output_section->convert_input_sections_to_relaxed_sections(new_relaxed); | |
cf43a2fe AM |
3670 | } |
3671 | ||
ec661b9d | 3672 | // Add a plt call stub, if we do not already have one for this |
d1a8cabd | 3673 | // sym/object/addend combo. |
cf43a2fe AM |
3674 | |
3675 | template<int size, bool big_endian> | |
3676 | void | |
ec661b9d | 3677 | Stub_table<size, big_endian>::add_plt_call_entry( |
c9824451 | 3678 | const Sized_relobj_file<size, big_endian>* object, |
d83ce4e3 | 3679 | const Symbol* gsym, |
ec661b9d AM |
3680 | unsigned int r_type, |
3681 | Address addend) | |
cf43a2fe | 3682 | { |
ec661b9d AM |
3683 | Plt_stub_ent ent(object, gsym, r_type, addend); |
3684 | Address off = this->plt_size_; | |
9e69ed50 AM |
3685 | std::pair<typename Plt_stub_entries::iterator, bool> p |
3686 | = this->plt_call_stubs_.insert(std::make_pair(ent, off)); | |
3687 | if (p.second) | |
3688 | this->plt_size_ = off + this->plt_call_size(p.first); | |
cf43a2fe AM |
3689 | } |
3690 | ||
e5d5f5ed AM |
3691 | template<int size, bool big_endian> |
3692 | void | |
ec661b9d | 3693 | Stub_table<size, big_endian>::add_plt_call_entry( |
c9824451 | 3694 | const Sized_relobj_file<size, big_endian>* object, |
e5d5f5ed | 3695 | unsigned int locsym_index, |
ec661b9d AM |
3696 | unsigned int r_type, |
3697 | Address addend) | |
e5d5f5ed | 3698 | { |
ec661b9d AM |
3699 | Plt_stub_ent ent(object, locsym_index, r_type, addend); |
3700 | Address off = this->plt_size_; | |
9e69ed50 AM |
3701 | std::pair<typename Plt_stub_entries::iterator, bool> p |
3702 | = this->plt_call_stubs_.insert(std::make_pair(ent, off)); | |
3703 | if (p.second) | |
3704 | this->plt_size_ = off + this->plt_call_size(p.first); | |
e5d5f5ed AM |
3705 | } |
3706 | ||
ec661b9d AM |
3707 | // Find a plt call stub. |
3708 | ||
cf43a2fe | 3709 | template<int size, bool big_endian> |
ec5b8187 | 3710 | typename Stub_table<size, big_endian>::Address |
ec661b9d | 3711 | Stub_table<size, big_endian>::find_plt_call_entry( |
c9824451 | 3712 | const Sized_relobj_file<size, big_endian>* object, |
d83ce4e3 | 3713 | const Symbol* gsym, |
ec661b9d AM |
3714 | unsigned int r_type, |
3715 | Address addend) const | |
c9824451 | 3716 | { |
ec661b9d AM |
3717 | Plt_stub_ent ent(object, gsym, r_type, addend); |
3718 | typename Plt_stub_entries::const_iterator p = this->plt_call_stubs_.find(ent); | |
3719 | return p == this->plt_call_stubs_.end() ? invalid_address : p->second; | |
c9824451 AM |
3720 | } |
3721 | ||
3722 | template<int size, bool big_endian> | |
ec5b8187 | 3723 | typename Stub_table<size, big_endian>::Address |
ec661b9d | 3724 | Stub_table<size, big_endian>::find_plt_call_entry(const Symbol* gsym) const |
cf43a2fe | 3725 | { |
ec661b9d AM |
3726 | Plt_stub_ent ent(gsym); |
3727 | typename Plt_stub_entries::const_iterator p = this->plt_call_stubs_.find(ent); | |
3728 | return p == this->plt_call_stubs_.end() ? invalid_address : p->second; | |
cf43a2fe AM |
3729 | } |
3730 | ||
e5d5f5ed | 3731 | template<int size, bool big_endian> |
ec5b8187 | 3732 | typename Stub_table<size, big_endian>::Address |
ec661b9d | 3733 | Stub_table<size, big_endian>::find_plt_call_entry( |
c9824451 | 3734 | const Sized_relobj_file<size, big_endian>* object, |
e5d5f5ed | 3735 | unsigned int locsym_index, |
ec661b9d AM |
3736 | unsigned int r_type, |
3737 | Address addend) const | |
e5d5f5ed | 3738 | { |
ec661b9d AM |
3739 | Plt_stub_ent ent(object, locsym_index, r_type, addend); |
3740 | typename Plt_stub_entries::const_iterator p = this->plt_call_stubs_.find(ent); | |
3741 | return p == this->plt_call_stubs_.end() ? invalid_address : p->second; | |
c9824451 AM |
3742 | } |
3743 | ||
3744 | template<int size, bool big_endian> | |
ec5b8187 | 3745 | typename Stub_table<size, big_endian>::Address |
ec661b9d | 3746 | Stub_table<size, big_endian>::find_plt_call_entry( |
c9824451 AM |
3747 | const Sized_relobj_file<size, big_endian>* object, |
3748 | unsigned int locsym_index) const | |
3749 | { | |
ec661b9d AM |
3750 | Plt_stub_ent ent(object, locsym_index); |
3751 | typename Plt_stub_entries::const_iterator p = this->plt_call_stubs_.find(ent); | |
3752 | return p == this->plt_call_stubs_.end() ? invalid_address : p->second; | |
3753 | } | |
3754 | ||
3755 | // Add a long branch stub if we don't already have one to given | |
3756 | // destination. | |
3757 | ||
3758 | template<int size, bool big_endian> | |
3759 | void | |
3760 | Stub_table<size, big_endian>::add_long_branch_entry( | |
3761 | const Powerpc_relobj<size, big_endian>* object, | |
3762 | Address to) | |
3763 | { | |
3764 | Branch_stub_ent ent(object, to); | |
3765 | Address off = this->branch_size_; | |
3766 | if (this->long_branch_stubs_.insert(std::make_pair(ent, off)).second) | |
3767 | { | |
3768 | unsigned int stub_size = this->branch_stub_size(to); | |
3769 | this->branch_size_ = off + stub_size; | |
3770 | if (size == 64 && stub_size != 4) | |
3771 | this->targ_->add_branch_lookup_table(to); | |
3772 | } | |
3773 | } | |
3774 | ||
3775 | // Find long branch stub. | |
3776 | ||
3777 | template<int size, bool big_endian> | |
ec5b8187 | 3778 | typename Stub_table<size, big_endian>::Address |
ec661b9d AM |
3779 | Stub_table<size, big_endian>::find_long_branch_entry( |
3780 | const Powerpc_relobj<size, big_endian>* object, | |
9d5781f8 | 3781 | Address to) const |
ec661b9d AM |
3782 | { |
3783 | Branch_stub_ent ent(object, to); | |
3784 | typename Branch_stub_entries::const_iterator p | |
3785 | = this->long_branch_stubs_.find(ent); | |
3786 | return p == this->long_branch_stubs_.end() ? invalid_address : p->second; | |
e5d5f5ed AM |
3787 | } |
3788 | ||
ec661b9d AM |
3789 | // A class to handle .glink. |
3790 | ||
3791 | template<int size, bool big_endian> | |
3792 | class Output_data_glink : public Output_section_data | |
3793 | { | |
3794 | public: | |
3795 | static const int pltresolve_size = 16*4; | |
3796 | ||
3797 | Output_data_glink(Target_powerpc<size, big_endian>* targ) | |
3798 | : Output_section_data(16), targ_(targ) | |
3799 | { } | |
3800 | ||
9d5781f8 AM |
3801 | void |
3802 | add_eh_frame(Layout* layout) | |
3803 | { | |
3804 | if (!parameters->options().ld_generated_unwind_info()) | |
3805 | return; | |
3806 | ||
3807 | if (size == 64) | |
3808 | layout->add_eh_frame_for_plt(this, | |
3809 | Eh_cie<64>::eh_frame_cie, | |
3810 | sizeof (Eh_cie<64>::eh_frame_cie), | |
3811 | glink_eh_frame_fde_64, | |
3812 | sizeof (glink_eh_frame_fde_64)); | |
3813 | else | |
3814 | { | |
3815 | // 32-bit .glink can use the default since the CIE return | |
3816 | // address reg, LR, is valid. | |
3817 | layout->add_eh_frame_for_plt(this, | |
3818 | Eh_cie<32>::eh_frame_cie, | |
3819 | sizeof (Eh_cie<32>::eh_frame_cie), | |
3820 | default_fde, | |
3821 | sizeof (default_fde)); | |
3822 | // Except where LR is used in a PIC __glink_PLTresolve. | |
3823 | if (parameters->options().output_is_position_independent()) | |
3824 | layout->add_eh_frame_for_plt(this, | |
3825 | Eh_cie<32>::eh_frame_cie, | |
3826 | sizeof (Eh_cie<32>::eh_frame_cie), | |
3827 | glink_eh_frame_fde_32, | |
3828 | sizeof (glink_eh_frame_fde_32)); | |
3829 | } | |
3830 | } | |
3831 | ||
ec661b9d AM |
3832 | protected: |
3833 | // Write to a map file. | |
3834 | void | |
3835 | do_print_to_mapfile(Mapfile* mapfile) const | |
3836 | { mapfile->print_output_data(this, _("** glink")); } | |
3837 | ||
3838 | private: | |
3839 | void | |
3840 | set_final_data_size(); | |
3841 | ||
3842 | // Write out .glink | |
3843 | void | |
3844 | do_write(Output_file*); | |
3845 | ||
3846 | // Allows access to .got and .plt for do_write. | |
3847 | Target_powerpc<size, big_endian>* targ_; | |
3848 | }; | |
3849 | ||
cf43a2fe AM |
3850 | template<int size, bool big_endian> |
3851 | void | |
3852 | Output_data_glink<size, big_endian>::set_final_data_size() | |
3853 | { | |
ec661b9d AM |
3854 | unsigned int count = this->targ_->plt_entry_count(); |
3855 | section_size_type total = 0; | |
cf43a2fe AM |
3856 | |
3857 | if (count != 0) | |
3858 | { | |
3859 | if (size == 32) | |
3860 | { | |
cf43a2fe AM |
3861 | // space for branch table |
3862 | total += 4 * (count - 1); | |
3863 | ||
3864 | total += -total & 15; | |
3865 | total += this->pltresolve_size; | |
3866 | } | |
3867 | else | |
3868 | { | |
cf43a2fe AM |
3869 | total += this->pltresolve_size; |
3870 | ||
3871 | // space for branch table | |
3872 | total += 8 * count; | |
3873 | if (count > 0x8000) | |
3874 | total += 4 * (count - 0x8000); | |
3875 | } | |
3876 | } | |
3877 | ||
3878 | this->set_data_size(total); | |
3879 | } | |
3880 | ||
ec661b9d | 3881 | // Write out plt and long branch stub code. |
cf43a2fe AM |
3882 | |
3883 | template<int size, bool big_endian> | |
3884 | void | |
ec661b9d | 3885 | Stub_table<size, big_endian>::do_write(Output_file* of) |
cf43a2fe | 3886 | { |
ec661b9d AM |
3887 | if (this->plt_call_stubs_.empty() |
3888 | && this->long_branch_stubs_.empty()) | |
3889 | return; | |
3890 | ||
3891 | const section_size_type start_off = this->offset(); | |
3892 | const section_size_type off = this->stub_offset(); | |
42cacb20 | 3893 | const section_size_type oview_size = |
ec661b9d | 3894 | convert_to_section_size_type(this->data_size() - (off - start_off)); |
cf43a2fe | 3895 | unsigned char* const oview = of->get_output_view(off, oview_size); |
c9269dff | 3896 | unsigned char* p; |
42cacb20 | 3897 | |
cf43a2fe AM |
3898 | if (size == 64) |
3899 | { | |
ec661b9d AM |
3900 | const Output_data_got_powerpc<size, big_endian>* got |
3901 | = this->targ_->got_section(); | |
dd93cd0a | 3902 | Address got_os_addr = got->output_section()->address(); |
c9269dff | 3903 | |
ec661b9d | 3904 | if (!this->plt_call_stubs_.empty()) |
cf43a2fe | 3905 | { |
ec661b9d AM |
3906 | // The base address of the .plt section. |
3907 | Address plt_base = this->targ_->plt_section()->address(); | |
3908 | Address iplt_base = invalid_address; | |
3909 | ||
3910 | // Write out plt call stubs. | |
3911 | typename Plt_stub_entries::const_iterator cs; | |
3912 | for (cs = this->plt_call_stubs_.begin(); | |
3913 | cs != this->plt_call_stubs_.end(); | |
3914 | ++cs) | |
e5d5f5ed | 3915 | { |
91c2b899 AM |
3916 | bool is_iplt; |
3917 | Address pltoff = this->plt_off(cs, &is_iplt); | |
9e69ed50 | 3918 | Address plt_addr = pltoff; |
91c2b899 | 3919 | if (is_iplt) |
ec661b9d AM |
3920 | { |
3921 | if (iplt_base == invalid_address) | |
3922 | iplt_base = this->targ_->iplt_section()->address(); | |
3923 | plt_addr += iplt_base; | |
3924 | } | |
3925 | else | |
3926 | plt_addr += plt_base; | |
3927 | const Powerpc_relobj<size, big_endian>* ppcobj = static_cast | |
3928 | <const Powerpc_relobj<size, big_endian>*>(cs->first.object_); | |
3929 | Address got_addr = got_os_addr + ppcobj->toc_base_offset(); | |
9e69ed50 | 3930 | Address off = plt_addr - got_addr; |
ec661b9d | 3931 | |
9e69ed50 | 3932 | if (off + 0x80008000 > 0xffffffff || (off & 7) != 0) |
ec661b9d AM |
3933 | gold_error(_("%s: linkage table error against `%s'"), |
3934 | cs->first.object_->name().c_str(), | |
3935 | cs->first.sym_->demangled_name().c_str()); | |
3936 | ||
9e69ed50 AM |
3937 | bool static_chain = parameters->options().plt_static_chain(); |
3938 | bool thread_safe = this->targ_->plt_thread_safe(); | |
3939 | bool use_fake_dep = false; | |
3940 | Address cmp_branch_off = 0; | |
3941 | if (thread_safe) | |
3942 | { | |
3943 | unsigned int pltindex | |
3944 | = ((pltoff - this->targ_->first_plt_entry_offset()) | |
3945 | / this->targ_->plt_entry_size()); | |
3946 | Address glinkoff | |
3947 | = (this->targ_->glink_section()->pltresolve_size | |
3948 | + pltindex * 8); | |
3949 | if (pltindex > 32768) | |
3950 | glinkoff += (pltindex - 32768) * 4; | |
3951 | Address to | |
3952 | = this->targ_->glink_section()->address() + glinkoff; | |
3953 | Address from | |
3954 | = (this->stub_address() + cs->second + 24 | |
3955 | + 4 * (ha(off) != 0) | |
3956 | + 4 * (ha(off + 8 + 8 * static_chain) != ha(off)) | |
3957 | + 4 * static_chain); | |
3958 | cmp_branch_off = to - from; | |
3959 | use_fake_dep = cmp_branch_off + (1 << 25) >= (1 << 26); | |
3960 | } | |
3961 | ||
ec661b9d | 3962 | p = oview + cs->second; |
9e69ed50 | 3963 | if (ha(off) != 0) |
ec661b9d | 3964 | { |
ec661b9d | 3965 | write_insn<big_endian>(p, std_2_1 + 40), p += 4; |
9e69ed50 AM |
3966 | write_insn<big_endian>(p, addis_12_2 + ha(off)), p += 4; |
3967 | write_insn<big_endian>(p, ld_11_12 + l(off)), p += 4; | |
3968 | if (ha(off + 8 + 8 * static_chain) != ha(off)) | |
ec661b9d | 3969 | { |
9e69ed50 AM |
3970 | write_insn<big_endian>(p, addi_12_12 + l(off)), p += 4; |
3971 | off = 0; | |
ec661b9d AM |
3972 | } |
3973 | write_insn<big_endian>(p, mtctr_11), p += 4; | |
9e69ed50 AM |
3974 | if (use_fake_dep) |
3975 | { | |
3976 | write_insn<big_endian>(p, xor_11_11_11), p += 4; | |
3977 | write_insn<big_endian>(p, add_12_12_11), p += 4; | |
3978 | } | |
3979 | write_insn<big_endian>(p, ld_2_12 + l(off + 8)), p += 4; | |
3980 | if (static_chain) | |
3981 | write_insn<big_endian>(p, ld_11_12 + l(off + 16)), p += 4; | |
ec661b9d AM |
3982 | } |
3983 | else | |
3984 | { | |
3985 | write_insn<big_endian>(p, std_2_1 + 40), p += 4; | |
91c2b899 | 3986 | write_insn<big_endian>(p, ld_11_2 + l(off)), p += 4; |
9e69ed50 | 3987 | if (ha(off + 8 + 8 * static_chain) != ha(off)) |
ec661b9d | 3988 | { |
9e69ed50 AM |
3989 | write_insn<big_endian>(p, addi_2_2 + l(off)), p += 4; |
3990 | off = 0; | |
ec661b9d AM |
3991 | } |
3992 | write_insn<big_endian>(p, mtctr_11), p += 4; | |
9e69ed50 AM |
3993 | if (use_fake_dep) |
3994 | { | |
3995 | write_insn<big_endian>(p, xor_11_11_11), p += 4; | |
3996 | write_insn<big_endian>(p, add_2_2_11), p += 4; | |
3997 | } | |
3998 | if (static_chain) | |
3999 | write_insn<big_endian>(p, ld_11_2 + l(off + 16)), p += 4; | |
4000 | write_insn<big_endian>(p, ld_2_2 + l(off + 8)), p += 4; | |
ec661b9d | 4001 | } |
9e69ed50 AM |
4002 | if (thread_safe && !use_fake_dep) |
4003 | { | |
4004 | write_insn<big_endian>(p, cmpldi_2_0), p += 4; | |
4005 | write_insn<big_endian>(p, bnectr_p4), p += 4; | |
4006 | write_insn<big_endian>(p, b | (cmp_branch_off & 0x3fffffc)); | |
4007 | } | |
4008 | else | |
4009 | write_insn<big_endian>(p, bctr); | |
e5d5f5ed | 4010 | } |
ec661b9d AM |
4011 | } |
4012 | ||
4013 | // Write out long branch stubs. | |
4014 | typename Branch_stub_entries::const_iterator bs; | |
4015 | for (bs = this->long_branch_stubs_.begin(); | |
4016 | bs != this->long_branch_stubs_.end(); | |
4017 | ++bs) | |
4018 | { | |
4019 | p = oview + this->plt_size_ + bs->second; | |
4020 | Address loc = this->stub_address() + this->plt_size_ + bs->second; | |
4021 | Address delta = bs->first.dest_ - loc; | |
4022 | if (delta + (1 << 25) < 2 << 25) | |
4023 | write_insn<big_endian>(p, b | (delta & 0x3fffffc)); | |
e5d5f5ed | 4024 | else |
cf43a2fe | 4025 | { |
ec661b9d AM |
4026 | Address brlt_addr |
4027 | = this->targ_->find_branch_lookup_table(bs->first.dest_); | |
4028 | gold_assert(brlt_addr != invalid_address); | |
4029 | brlt_addr += this->targ_->brlt_section()->address(); | |
4030 | Address got_addr = got_os_addr + bs->first.toc_base_off_; | |
4031 | Address brltoff = brlt_addr - got_addr; | |
4032 | if (ha(brltoff) == 0) | |
4033 | { | |
4034 | write_insn<big_endian>(p, ld_11_2 + l(brltoff)), p += 4; | |
4035 | } | |
4036 | else | |
cf43a2fe | 4037 | { |
ec661b9d AM |
4038 | write_insn<big_endian>(p, addis_12_2 + ha(brltoff)), p += 4; |
4039 | write_insn<big_endian>(p, ld_11_12 + l(brltoff)), p += 4; | |
cf43a2fe AM |
4040 | } |
4041 | write_insn<big_endian>(p, mtctr_11), p += 4; | |
ec661b9d | 4042 | write_insn<big_endian>(p, bctr); |
cf43a2fe | 4043 | } |
ec661b9d AM |
4044 | } |
4045 | } | |
4046 | else | |
4047 | { | |
4048 | if (!this->plt_call_stubs_.empty()) | |
4049 | { | |
4050 | // The base address of the .plt section. | |
4051 | Address plt_base = this->targ_->plt_section()->address(); | |
4052 | Address iplt_base = invalid_address; | |
4053 | // The address of _GLOBAL_OFFSET_TABLE_. | |
4054 | Address g_o_t = invalid_address; | |
4055 | ||
4056 | // Write out plt call stubs. | |
4057 | typename Plt_stub_entries::const_iterator cs; | |
4058 | for (cs = this->plt_call_stubs_.begin(); | |
4059 | cs != this->plt_call_stubs_.end(); | |
4060 | ++cs) | |
cf43a2fe | 4061 | { |
91c2b899 AM |
4062 | bool is_iplt; |
4063 | Address plt_addr = this->plt_off(cs, &is_iplt); | |
4064 | if (is_iplt) | |
ec661b9d AM |
4065 | { |
4066 | if (iplt_base == invalid_address) | |
4067 | iplt_base = this->targ_->iplt_section()->address(); | |
4068 | plt_addr += iplt_base; | |
4069 | } | |
4070 | else | |
4071 | plt_addr += plt_base; | |
4072 | ||
4073 | p = oview + cs->second; | |
4074 | if (parameters->options().output_is_position_independent()) | |
4075 | { | |
4076 | Address got_addr; | |
4077 | const Powerpc_relobj<size, big_endian>* ppcobj | |
4078 | = (static_cast<const Powerpc_relobj<size, big_endian>*> | |
4079 | (cs->first.object_)); | |
4080 | if (ppcobj != NULL && cs->first.addend_ >= 32768) | |
4081 | { | |
4082 | unsigned int got2 = ppcobj->got2_shndx(); | |
4083 | got_addr = ppcobj->get_output_section_offset(got2); | |
4084 | gold_assert(got_addr != invalid_address); | |
4085 | got_addr += (ppcobj->output_section(got2)->address() | |
4086 | + cs->first.addend_); | |
4087 | } | |
4088 | else | |
4089 | { | |
4090 | if (g_o_t == invalid_address) | |
4091 | { | |
4092 | const Output_data_got_powerpc<size, big_endian>* got | |
4093 | = this->targ_->got_section(); | |
4094 | g_o_t = got->address() + got->g_o_t(); | |
4095 | } | |
4096 | got_addr = g_o_t; | |
4097 | } | |
4098 | ||
9e69ed50 AM |
4099 | Address off = plt_addr - got_addr; |
4100 | if (ha(off) == 0) | |
ec661b9d | 4101 | { |
9e69ed50 | 4102 | write_insn<big_endian>(p + 0, lwz_11_30 + l(off)); |
ec661b9d AM |
4103 | write_insn<big_endian>(p + 4, mtctr_11); |
4104 | write_insn<big_endian>(p + 8, bctr); | |
4105 | } | |
4106 | else | |
4107 | { | |
9e69ed50 AM |
4108 | write_insn<big_endian>(p + 0, addis_11_30 + ha(off)); |
4109 | write_insn<big_endian>(p + 4, lwz_11_11 + l(off)); | |
ec661b9d AM |
4110 | write_insn<big_endian>(p + 8, mtctr_11); |
4111 | write_insn<big_endian>(p + 12, bctr); | |
4112 | } | |
4113 | } | |
4114 | else | |
4115 | { | |
4116 | write_insn<big_endian>(p + 0, lis_11 + ha(plt_addr)); | |
4117 | write_insn<big_endian>(p + 4, lwz_11_11 + l(plt_addr)); | |
4118 | write_insn<big_endian>(p + 8, mtctr_11); | |
4119 | write_insn<big_endian>(p + 12, bctr); | |
4120 | } | |
4121 | } | |
4122 | } | |
4123 | ||
4124 | // Write out long branch stubs. | |
4125 | typename Branch_stub_entries::const_iterator bs; | |
4126 | for (bs = this->long_branch_stubs_.begin(); | |
4127 | bs != this->long_branch_stubs_.end(); | |
4128 | ++bs) | |
4129 | { | |
4130 | p = oview + this->plt_size_ + bs->second; | |
4131 | Address loc = this->stub_address() + this->plt_size_ + bs->second; | |
4132 | Address delta = bs->first.dest_ - loc; | |
4133 | if (delta + (1 << 25) < 2 << 25) | |
4134 | write_insn<big_endian>(p, b | (delta & 0x3fffffc)); | |
4135 | else if (!parameters->options().output_is_position_independent()) | |
4136 | { | |
4137 | write_insn<big_endian>(p + 0, lis_12 + ha(bs->first.dest_)); | |
4138 | write_insn<big_endian>(p + 4, addi_12_12 + l(bs->first.dest_)); | |
4139 | write_insn<big_endian>(p + 8, mtctr_12); | |
4140 | write_insn<big_endian>(p + 12, bctr); | |
4141 | } | |
4142 | else | |
4143 | { | |
4144 | delta -= 8; | |
4145 | write_insn<big_endian>(p + 0, mflr_0); | |
4146 | write_insn<big_endian>(p + 4, bcl_20_31); | |
4147 | write_insn<big_endian>(p + 8, mflr_12); | |
4148 | write_insn<big_endian>(p + 12, addis_12_12 + ha(delta)); | |
4149 | write_insn<big_endian>(p + 16, addi_12_12 + l(delta)); | |
4150 | write_insn<big_endian>(p + 20, mtlr_0); | |
4151 | write_insn<big_endian>(p + 24, mtctr_12); | |
4152 | write_insn<big_endian>(p + 28, bctr); | |
cf43a2fe AM |
4153 | } |
4154 | } | |
ec661b9d AM |
4155 | } |
4156 | } | |
4157 | ||
4158 | // Write out .glink. | |
4159 | ||
4160 | template<int size, bool big_endian> | |
4161 | void | |
4162 | Output_data_glink<size, big_endian>::do_write(Output_file* of) | |
4163 | { | |
4164 | const section_size_type off = this->offset(); | |
4165 | const section_size_type oview_size = | |
4166 | convert_to_section_size_type(this->data_size()); | |
4167 | unsigned char* const oview = of->get_output_view(off, oview_size); | |
4168 | unsigned char* p; | |
4169 | ||
4170 | // The base address of the .plt section. | |
4171 | typedef typename elfcpp::Elf_types<size>::Elf_Addr Address; | |
4172 | Address plt_base = this->targ_->plt_section()->address(); | |
cf43a2fe | 4173 | |
ec661b9d AM |
4174 | if (size == 64) |
4175 | { | |
cf43a2fe | 4176 | // Write pltresolve stub. |
ec661b9d AM |
4177 | p = oview; |
4178 | Address after_bcl = this->address() + 16; | |
dd93cd0a | 4179 | Address pltoff = plt_base - after_bcl; |
cf43a2fe AM |
4180 | |
4181 | elfcpp::Swap<64, big_endian>::writeval(p, pltoff), p += 8; | |
4182 | ||
4183 | write_insn<big_endian>(p, mflr_12), p += 4; | |
4184 | write_insn<big_endian>(p, bcl_20_31), p += 4; | |
4185 | write_insn<big_endian>(p, mflr_11), p += 4; | |
4186 | write_insn<big_endian>(p, ld_2_11 + l(-16)), p += 4; | |
4187 | write_insn<big_endian>(p, mtlr_12), p += 4; | |
4188 | write_insn<big_endian>(p, add_12_2_11), p += 4; | |
4189 | write_insn<big_endian>(p, ld_11_12 + 0), p += 4; | |
4190 | write_insn<big_endian>(p, ld_2_12 + 8), p += 4; | |
4191 | write_insn<big_endian>(p, mtctr_11), p += 4; | |
4192 | write_insn<big_endian>(p, ld_11_12 + 16), p += 4; | |
4193 | write_insn<big_endian>(p, bctr), p += 4; | |
ec661b9d | 4194 | while (p < oview + this->pltresolve_size) |
cf43a2fe AM |
4195 | write_insn<big_endian>(p, nop), p += 4; |
4196 | ||
4197 | // Write lazy link call stubs. | |
4198 | uint32_t indx = 0; | |
4199 | while (p < oview + oview_size) | |
4200 | { | |
4201 | if (indx < 0x8000) | |
4202 | { | |
4203 | write_insn<big_endian>(p, li_0_0 + indx), p += 4; | |
4204 | } | |
4205 | else | |
4206 | { | |
4207 | write_insn<big_endian>(p, lis_0_0 + hi(indx)), p += 4; | |
4208 | write_insn<big_endian>(p, ori_0_0_0 + l(indx)), p += 4; | |
4209 | } | |
ec661b9d | 4210 | uint32_t branch_off = 8 - (p - oview); |
cf43a2fe AM |
4211 | write_insn<big_endian>(p, b + (branch_off & 0x3fffffc)), p += 4; |
4212 | indx++; | |
4213 | } | |
4214 | } | |
4215 | else | |
4216 | { | |
ec661b9d AM |
4217 | const Output_data_got_powerpc<size, big_endian>* got |
4218 | = this->targ_->got_section(); | |
dd93cd0a AM |
4219 | // The address of _GLOBAL_OFFSET_TABLE_. |
4220 | Address g_o_t = got->address() + got->g_o_t(); | |
c9269dff | 4221 | |
cf43a2fe | 4222 | // Write out pltresolve branch table. |
ec661b9d | 4223 | p = oview; |
cf43a2fe | 4224 | unsigned int the_end = oview_size - this->pltresolve_size; |
c9269dff | 4225 | unsigned char* end_p = oview + the_end; |
cf43a2fe AM |
4226 | while (p < end_p - 8 * 4) |
4227 | write_insn<big_endian>(p, b + end_p - p), p += 4; | |
4228 | while (p < end_p) | |
4229 | write_insn<big_endian>(p, nop), p += 4; | |
42cacb20 | 4230 | |
cf43a2fe AM |
4231 | // Write out pltresolve call stub. |
4232 | if (parameters->options().output_is_position_independent()) | |
42cacb20 | 4233 | { |
ec661b9d | 4234 | Address res0_off = 0; |
dd93cd0a AM |
4235 | Address after_bcl_off = the_end + 12; |
4236 | Address bcl_res0 = after_bcl_off - res0_off; | |
cf43a2fe AM |
4237 | |
4238 | write_insn<big_endian>(p + 0, addis_11_11 + ha(bcl_res0)); | |
4239 | write_insn<big_endian>(p + 4, mflr_0); | |
4240 | write_insn<big_endian>(p + 8, bcl_20_31); | |
4241 | write_insn<big_endian>(p + 12, addi_11_11 + l(bcl_res0)); | |
4242 | write_insn<big_endian>(p + 16, mflr_12); | |
4243 | write_insn<big_endian>(p + 20, mtlr_0); | |
4244 | write_insn<big_endian>(p + 24, sub_11_11_12); | |
4245 | ||
dd93cd0a | 4246 | Address got_bcl = g_o_t + 4 - (after_bcl_off + this->address()); |
cf43a2fe AM |
4247 | |
4248 | write_insn<big_endian>(p + 28, addis_12_12 + ha(got_bcl)); | |
4249 | if (ha(got_bcl) == ha(got_bcl + 4)) | |
4250 | { | |
4251 | write_insn<big_endian>(p + 32, lwz_0_12 + l(got_bcl)); | |
4252 | write_insn<big_endian>(p + 36, lwz_12_12 + l(got_bcl + 4)); | |
4253 | } | |
4254 | else | |
4255 | { | |
4256 | write_insn<big_endian>(p + 32, lwzu_0_12 + l(got_bcl)); | |
4257 | write_insn<big_endian>(p + 36, lwz_12_12 + 4); | |
4258 | } | |
4259 | write_insn<big_endian>(p + 40, mtctr_0); | |
4260 | write_insn<big_endian>(p + 44, add_0_11_11); | |
4261 | write_insn<big_endian>(p + 48, add_11_0_11); | |
4262 | write_insn<big_endian>(p + 52, bctr); | |
4263 | write_insn<big_endian>(p + 56, nop); | |
4264 | write_insn<big_endian>(p + 60, nop); | |
42cacb20 | 4265 | } |
cf43a2fe | 4266 | else |
42cacb20 | 4267 | { |
ec661b9d | 4268 | Address res0 = this->address(); |
cf43a2fe AM |
4269 | |
4270 | write_insn<big_endian>(p + 0, lis_12 + ha(g_o_t + 4)); | |
4271 | write_insn<big_endian>(p + 4, addis_11_11 + ha(-res0)); | |
4272 | if (ha(g_o_t + 4) == ha(g_o_t + 8)) | |
4273 | write_insn<big_endian>(p + 8, lwz_0_12 + l(g_o_t + 4)); | |
4274 | else | |
4275 | write_insn<big_endian>(p + 8, lwzu_0_12 + l(g_o_t + 4)); | |
4276 | write_insn<big_endian>(p + 12, addi_11_11 + l(-res0)); | |
4277 | write_insn<big_endian>(p + 16, mtctr_0); | |
4278 | write_insn<big_endian>(p + 20, add_0_11_11); | |
4279 | if (ha(g_o_t + 4) == ha(g_o_t + 8)) | |
4280 | write_insn<big_endian>(p + 24, lwz_12_12 + l(g_o_t + 8)); | |
4281 | else | |
4282 | write_insn<big_endian>(p + 24, lwz_12_12 + 4); | |
4283 | write_insn<big_endian>(p + 28, add_11_0_11); | |
4284 | write_insn<big_endian>(p + 32, bctr); | |
4285 | write_insn<big_endian>(p + 36, nop); | |
4286 | write_insn<big_endian>(p + 40, nop); | |
4287 | write_insn<big_endian>(p + 44, nop); | |
4288 | write_insn<big_endian>(p + 48, nop); | |
4289 | write_insn<big_endian>(p + 52, nop); | |
4290 | write_insn<big_endian>(p + 56, nop); | |
4291 | write_insn<big_endian>(p + 60, nop); | |
42cacb20 | 4292 | } |
cf43a2fe | 4293 | p += 64; |
42cacb20 DE |
4294 | } |
4295 | ||
cf43a2fe AM |
4296 | of->write_output_view(off, oview_size, oview); |
4297 | } | |
4298 | ||
f3a0ed29 AM |
4299 | |
4300 | // A class to handle linker generated save/restore functions. | |
4301 | ||
4302 | template<int size, bool big_endian> | |
4303 | class Output_data_save_res : public Output_section_data_build | |
4304 | { | |
4305 | public: | |
4306 | Output_data_save_res(Symbol_table* symtab); | |
4307 | ||
4308 | protected: | |
4309 | // Write to a map file. | |
4310 | void | |
4311 | do_print_to_mapfile(Mapfile* mapfile) const | |
4312 | { mapfile->print_output_data(this, _("** save/restore")); } | |
4313 | ||
4314 | void | |
4315 | do_write(Output_file*); | |
4316 | ||
4317 | private: | |
4318 | // The maximum size of save/restore contents. | |
4319 | static const unsigned int savres_max = 218*4; | |
4320 | ||
4321 | void | |
4322 | savres_define(Symbol_table* symtab, | |
4323 | const char *name, | |
4324 | unsigned int lo, unsigned int hi, | |
4325 | unsigned char* write_ent(unsigned char*, int), | |
4326 | unsigned char* write_tail(unsigned char*, int)); | |
4327 | ||
4328 | unsigned char *contents_; | |
4329 | }; | |
4330 | ||
4331 | template<bool big_endian> | |
4332 | static unsigned char* | |
4333 | savegpr0(unsigned char* p, int r) | |
4334 | { | |
4335 | uint32_t insn = std_0_1 + (r << 21) + (1 << 16) - (32 - r) * 8; | |
4336 | write_insn<big_endian>(p, insn); | |
4337 | return p + 4; | |
4338 | } | |
4339 | ||
4340 | template<bool big_endian> | |
4341 | static unsigned char* | |
4342 | savegpr0_tail(unsigned char* p, int r) | |
4343 | { | |
4344 | p = savegpr0<big_endian>(p, r); | |
4345 | uint32_t insn = std_0_1 + 16; | |
4346 | write_insn<big_endian>(p, insn); | |
4347 | p = p + 4; | |
4348 | write_insn<big_endian>(p, blr); | |
4349 | return p + 4; | |
4350 | } | |
4351 | ||
4352 | template<bool big_endian> | |
62fe925a | 4353 | static unsigned char* |
f3a0ed29 AM |
4354 | restgpr0(unsigned char* p, int r) |
4355 | { | |
4356 | uint32_t insn = ld_0_1 + (r << 21) + (1 << 16) - (32 - r) * 8; | |
4357 | write_insn<big_endian>(p, insn); | |
4358 | return p + 4; | |
4359 | } | |
4360 | ||
4361 | template<bool big_endian> | |
62fe925a | 4362 | static unsigned char* |
f3a0ed29 AM |
4363 | restgpr0_tail(unsigned char* p, int r) |
4364 | { | |
4365 | uint32_t insn = ld_0_1 + 16; | |
4366 | write_insn<big_endian>(p, insn); | |
4367 | p = p + 4; | |
4368 | p = restgpr0<big_endian>(p, r); | |
4369 | write_insn<big_endian>(p, mtlr_0); | |
4370 | p = p + 4; | |
4371 | if (r == 29) | |
4372 | { | |
4373 | p = restgpr0<big_endian>(p, 30); | |
4374 | p = restgpr0<big_endian>(p, 31); | |
4375 | } | |
4376 | write_insn<big_endian>(p, blr); | |
4377 | return p + 4; | |
4378 | } | |
4379 | ||
4380 | template<bool big_endian> | |
62fe925a | 4381 | static unsigned char* |
f3a0ed29 AM |
4382 | savegpr1(unsigned char* p, int r) |
4383 | { | |
4384 | uint32_t insn = std_0_12 + (r << 21) + (1 << 16) - (32 - r) * 8; | |
4385 | write_insn<big_endian>(p, insn); | |
4386 | return p + 4; | |
4387 | } | |
4388 | ||
4389 | template<bool big_endian> | |
62fe925a | 4390 | static unsigned char* |
f3a0ed29 AM |
4391 | savegpr1_tail(unsigned char* p, int r) |
4392 | { | |
4393 | p = savegpr1<big_endian>(p, r); | |
4394 | write_insn<big_endian>(p, blr); | |
4395 | return p + 4; | |
4396 | } | |
4397 | ||
4398 | template<bool big_endian> | |
62fe925a | 4399 | static unsigned char* |
f3a0ed29 AM |
4400 | restgpr1(unsigned char* p, int r) |
4401 | { | |
4402 | uint32_t insn = ld_0_12 + (r << 21) + (1 << 16) - (32 - r) * 8; | |
4403 | write_insn<big_endian>(p, insn); | |
4404 | return p + 4; | |
4405 | } | |
4406 | ||
4407 | template<bool big_endian> | |
62fe925a | 4408 | static unsigned char* |
f3a0ed29 AM |
4409 | restgpr1_tail(unsigned char* p, int r) |
4410 | { | |
4411 | p = restgpr1<big_endian>(p, r); | |
4412 | write_insn<big_endian>(p, blr); | |
4413 | return p + 4; | |
4414 | } | |
4415 | ||
4416 | template<bool big_endian> | |
62fe925a | 4417 | static unsigned char* |
f3a0ed29 AM |
4418 | savefpr(unsigned char* p, int r) |
4419 | { | |
4420 | uint32_t insn = stfd_0_1 + (r << 21) + (1 << 16) - (32 - r) * 8; | |
4421 | write_insn<big_endian>(p, insn); | |
4422 | return p + 4; | |
4423 | } | |
4424 | ||
4425 | template<bool big_endian> | |
62fe925a | 4426 | static unsigned char* |
f3a0ed29 AM |
4427 | savefpr0_tail(unsigned char* p, int r) |
4428 | { | |
4429 | p = savefpr<big_endian>(p, r); | |
4430 | write_insn<big_endian>(p, std_0_1 + 16); | |
4431 | p = p + 4; | |
4432 | write_insn<big_endian>(p, blr); | |
4433 | return p + 4; | |
4434 | } | |
4435 | ||
4436 | template<bool big_endian> | |
62fe925a | 4437 | static unsigned char* |
f3a0ed29 AM |
4438 | restfpr(unsigned char* p, int r) |
4439 | { | |
4440 | uint32_t insn = lfd_0_1 + (r << 21) + (1 << 16) - (32 - r) * 8; | |
4441 | write_insn<big_endian>(p, insn); | |
4442 | return p + 4; | |
4443 | } | |
4444 | ||
4445 | template<bool big_endian> | |
62fe925a | 4446 | static unsigned char* |
f3a0ed29 AM |
4447 | restfpr0_tail(unsigned char* p, int r) |
4448 | { | |
4449 | write_insn<big_endian>(p, ld_0_1 + 16); | |
4450 | p = p + 4; | |
4451 | p = restfpr<big_endian>(p, r); | |
4452 | write_insn<big_endian>(p, mtlr_0); | |
4453 | p = p + 4; | |
4454 | if (r == 29) | |
4455 | { | |
4456 | p = restfpr<big_endian>(p, 30); | |
4457 | p = restfpr<big_endian>(p, 31); | |
4458 | } | |
4459 | write_insn<big_endian>(p, blr); | |
4460 | return p + 4; | |
4461 | } | |
4462 | ||
4463 | template<bool big_endian> | |
62fe925a | 4464 | static unsigned char* |
f3a0ed29 AM |
4465 | savefpr1_tail(unsigned char* p, int r) |
4466 | { | |
4467 | p = savefpr<big_endian>(p, r); | |
4468 | write_insn<big_endian>(p, blr); | |
4469 | return p + 4; | |
4470 | } | |
4471 | ||
4472 | template<bool big_endian> | |
62fe925a | 4473 | static unsigned char* |
f3a0ed29 AM |
4474 | restfpr1_tail(unsigned char* p, int r) |
4475 | { | |
4476 | p = restfpr<big_endian>(p, r); | |
4477 | write_insn<big_endian>(p, blr); | |
4478 | return p + 4; | |
4479 | } | |
4480 | ||
4481 | template<bool big_endian> | |
62fe925a | 4482 | static unsigned char* |
f3a0ed29 AM |
4483 | savevr(unsigned char* p, int r) |
4484 | { | |
4485 | uint32_t insn = li_12_0 + (1 << 16) - (32 - r) * 16; | |
4486 | write_insn<big_endian>(p, insn); | |
4487 | p = p + 4; | |
4488 | insn = stvx_0_12_0 + (r << 21); | |
4489 | write_insn<big_endian>(p, insn); | |
4490 | return p + 4; | |
4491 | } | |
4492 | ||
4493 | template<bool big_endian> | |
62fe925a | 4494 | static unsigned char* |
f3a0ed29 AM |
4495 | savevr_tail(unsigned char* p, int r) |
4496 | { | |
4497 | p = savevr<big_endian>(p, r); | |
4498 | write_insn<big_endian>(p, blr); | |
4499 | return p + 4; | |
4500 | } | |
4501 | ||
4502 | template<bool big_endian> | |
62fe925a | 4503 | static unsigned char* |
f3a0ed29 AM |
4504 | restvr(unsigned char* p, int r) |
4505 | { | |
4506 | uint32_t insn = li_12_0 + (1 << 16) - (32 - r) * 16; | |
4507 | write_insn<big_endian>(p, insn); | |
4508 | p = p + 4; | |
4509 | insn = lvx_0_12_0 + (r << 21); | |
4510 | write_insn<big_endian>(p, insn); | |
4511 | return p + 4; | |
4512 | } | |
4513 | ||
4514 | template<bool big_endian> | |
62fe925a | 4515 | static unsigned char* |
f3a0ed29 AM |
4516 | restvr_tail(unsigned char* p, int r) |
4517 | { | |
4518 | p = restvr<big_endian>(p, r); | |
4519 | write_insn<big_endian>(p, blr); | |
4520 | return p + 4; | |
4521 | } | |
4522 | ||
4523 | ||
4524 | template<int size, bool big_endian> | |
4525 | Output_data_save_res<size, big_endian>::Output_data_save_res( | |
4526 | Symbol_table* symtab) | |
4527 | : Output_section_data_build(4), | |
4528 | contents_(NULL) | |
4529 | { | |
4530 | this->savres_define(symtab, | |
4531 | "_savegpr0_", 14, 31, | |
4532 | savegpr0<big_endian>, savegpr0_tail<big_endian>); | |
4533 | this->savres_define(symtab, | |
4534 | "_restgpr0_", 14, 29, | |
4535 | restgpr0<big_endian>, restgpr0_tail<big_endian>); | |
4536 | this->savres_define(symtab, | |
4537 | "_restgpr0_", 30, 31, | |
4538 | restgpr0<big_endian>, restgpr0_tail<big_endian>); | |
4539 | this->savres_define(symtab, | |
4540 | "_savegpr1_", 14, 31, | |
4541 | savegpr1<big_endian>, savegpr1_tail<big_endian>); | |
4542 | this->savres_define(symtab, | |
4543 | "_restgpr1_", 14, 31, | |
4544 | restgpr1<big_endian>, restgpr1_tail<big_endian>); | |
4545 | this->savres_define(symtab, | |
4546 | "_savefpr_", 14, 31, | |
4547 | savefpr<big_endian>, savefpr0_tail<big_endian>); | |
4548 | this->savres_define(symtab, | |
4549 | "_restfpr_", 14, 29, | |
4550 | restfpr<big_endian>, restfpr0_tail<big_endian>); | |
4551 | this->savres_define(symtab, | |
4552 | "_restfpr_", 30, 31, | |
4553 | restfpr<big_endian>, restfpr0_tail<big_endian>); | |
4554 | this->savres_define(symtab, | |
4555 | "._savef", 14, 31, | |
4556 | savefpr<big_endian>, savefpr1_tail<big_endian>); | |
4557 | this->savres_define(symtab, | |
4558 | "._restf", 14, 31, | |
4559 | restfpr<big_endian>, restfpr1_tail<big_endian>); | |
4560 | this->savres_define(symtab, | |
4561 | "_savevr_", 20, 31, | |
4562 | savevr<big_endian>, savevr_tail<big_endian>); | |
4563 | this->savres_define(symtab, | |
4564 | "_restvr_", 20, 31, | |
4565 | restvr<big_endian>, restvr_tail<big_endian>); | |
4566 | } | |
4567 | ||
4568 | template<int size, bool big_endian> | |
4569 | void | |
4570 | Output_data_save_res<size, big_endian>::savres_define( | |
4571 | Symbol_table* symtab, | |
4572 | const char *name, | |
4573 | unsigned int lo, unsigned int hi, | |
4574 | unsigned char* write_ent(unsigned char*, int), | |
4575 | unsigned char* write_tail(unsigned char*, int)) | |
4576 | { | |
4577 | size_t len = strlen(name); | |
4578 | bool writing = false; | |
4579 | char sym[16]; | |
4580 | ||
4581 | memcpy(sym, name, len); | |
4582 | sym[len + 2] = 0; | |
4583 | ||
4584 | for (unsigned int i = lo; i <= hi; i++) | |
4585 | { | |
4586 | sym[len + 0] = i / 10 + '0'; | |
4587 | sym[len + 1] = i % 10 + '0'; | |
4588 | Symbol* gsym = symtab->lookup(sym); | |
4589 | bool refd = gsym != NULL && gsym->is_undefined(); | |
4590 | writing = writing || refd; | |
4591 | if (writing) | |
4592 | { | |
4593 | if (this->contents_ == NULL) | |
4594 | this->contents_ = new unsigned char[this->savres_max]; | |
4595 | ||
ec661b9d | 4596 | section_size_type value = this->current_data_size(); |
f3a0ed29 AM |
4597 | unsigned char* p = this->contents_ + value; |
4598 | if (i != hi) | |
4599 | p = write_ent(p, i); | |
4600 | else | |
4601 | p = write_tail(p, i); | |
ec661b9d | 4602 | section_size_type cur_size = p - this->contents_; |
f3a0ed29 AM |
4603 | this->set_current_data_size(cur_size); |
4604 | if (refd) | |
4605 | symtab->define_in_output_data(sym, NULL, Symbol_table::PREDEFINED, | |
4606 | this, value, cur_size - value, | |
4607 | elfcpp::STT_FUNC, elfcpp::STB_GLOBAL, | |
4608 | elfcpp::STV_HIDDEN, 0, false, false); | |
4609 | } | |
4610 | } | |
4611 | } | |
4612 | ||
4613 | // Write out save/restore. | |
4614 | ||
4615 | template<int size, bool big_endian> | |
4616 | void | |
4617 | Output_data_save_res<size, big_endian>::do_write(Output_file* of) | |
4618 | { | |
ec661b9d | 4619 | const section_size_type off = this->offset(); |
f3a0ed29 AM |
4620 | const section_size_type oview_size = |
4621 | convert_to_section_size_type(this->data_size()); | |
4622 | unsigned char* const oview = of->get_output_view(off, oview_size); | |
4623 | memcpy(oview, this->contents_, oview_size); | |
4624 | of->write_output_view(off, oview_size, oview); | |
4625 | } | |
4626 | ||
4627 | ||
cf43a2fe | 4628 | // Create the glink section. |
42cacb20 | 4629 | |
cf43a2fe AM |
4630 | template<int size, bool big_endian> |
4631 | void | |
4632 | Target_powerpc<size, big_endian>::make_glink_section(Layout* layout) | |
4633 | { | |
4634 | if (this->glink_ == NULL) | |
4635 | { | |
4636 | this->glink_ = new Output_data_glink<size, big_endian>(this); | |
9d5781f8 | 4637 | this->glink_->add_eh_frame(layout); |
cf43a2fe AM |
4638 | layout->add_output_section_data(".text", elfcpp::SHT_PROGBITS, |
4639 | elfcpp::SHF_ALLOC | elfcpp::SHF_EXECINSTR, | |
4640 | this->glink_, ORDER_TEXT, false); | |
4641 | } | |
42cacb20 DE |
4642 | } |
4643 | ||
4644 | // Create a PLT entry for a global symbol. | |
4645 | ||
4646 | template<int size, bool big_endian> | |
4647 | void | |
ec661b9d AM |
4648 | Target_powerpc<size, big_endian>::make_plt_entry(Symbol_table* symtab, |
4649 | Layout* layout, | |
4650 | Symbol* gsym) | |
42cacb20 | 4651 | { |
e5d5f5ed AM |
4652 | if (gsym->type() == elfcpp::STT_GNU_IFUNC |
4653 | && gsym->can_use_relative_reloc(false)) | |
4654 | { | |
4655 | if (this->iplt_ == NULL) | |
40b469d7 | 4656 | this->make_iplt_section(symtab, layout); |
03e25981 | 4657 | this->iplt_->add_ifunc_entry(gsym); |
e5d5f5ed AM |
4658 | } |
4659 | else | |
4660 | { | |
4661 | if (this->plt_ == NULL) | |
40b469d7 | 4662 | this->make_plt_section(symtab, layout); |
03e25981 | 4663 | this->plt_->add_entry(gsym); |
e5d5f5ed | 4664 | } |
e5d5f5ed | 4665 | } |
42cacb20 | 4666 | |
e5d5f5ed | 4667 | // Make a PLT entry for a local STT_GNU_IFUNC symbol. |
612a8d3d | 4668 | |
e5d5f5ed AM |
4669 | template<int size, bool big_endian> |
4670 | void | |
4671 | Target_powerpc<size, big_endian>::make_local_ifunc_plt_entry( | |
40b469d7 | 4672 | Symbol_table* symtab, |
e5d5f5ed | 4673 | Layout* layout, |
ec661b9d AM |
4674 | Sized_relobj_file<size, big_endian>* relobj, |
4675 | unsigned int r_sym) | |
e5d5f5ed AM |
4676 | { |
4677 | if (this->iplt_ == NULL) | |
40b469d7 | 4678 | this->make_iplt_section(symtab, layout); |
03e25981 | 4679 | this->iplt_->add_local_ifunc_entry(relobj, r_sym); |
42cacb20 DE |
4680 | } |
4681 | ||
0e70b911 CC |
4682 | // Return the number of entries in the PLT. |
4683 | ||
4684 | template<int size, bool big_endian> | |
4685 | unsigned int | |
4686 | Target_powerpc<size, big_endian>::plt_entry_count() const | |
4687 | { | |
4688 | if (this->plt_ == NULL) | |
4689 | return 0; | |
b3ccdeb5 | 4690 | return this->plt_->entry_count(); |
0e70b911 CC |
4691 | } |
4692 | ||
4693 | // Return the offset of the first non-reserved PLT entry. | |
4694 | ||
4695 | template<int size, bool big_endian> | |
4696 | unsigned int | |
4697 | Target_powerpc<size, big_endian>::first_plt_entry_offset() const | |
4698 | { | |
e5d5f5ed | 4699 | return this->plt_->first_plt_entry_offset(); |
0e70b911 CC |
4700 | } |
4701 | ||
4702 | // Return the size of each PLT entry. | |
4703 | ||
4704 | template<int size, bool big_endian> | |
4705 | unsigned int | |
4706 | Target_powerpc<size, big_endian>::plt_entry_size() const | |
4707 | { | |
4708 | return Output_data_plt_powerpc<size, big_endian>::get_plt_entry_size(); | |
4709 | } | |
4710 | ||
dd93cd0a | 4711 | // Create a GOT entry for local dynamic __tls_get_addr calls. |
42cacb20 DE |
4712 | |
4713 | template<int size, bool big_endian> | |
4714 | unsigned int | |
dd93cd0a | 4715 | Target_powerpc<size, big_endian>::tlsld_got_offset( |
6fa2a40b CC |
4716 | Symbol_table* symtab, |
4717 | Layout* layout, | |
4718 | Sized_relobj_file<size, big_endian>* object) | |
42cacb20 | 4719 | { |
dd93cd0a | 4720 | if (this->tlsld_got_offset_ == -1U) |
42cacb20 DE |
4721 | { |
4722 | gold_assert(symtab != NULL && layout != NULL && object != NULL); | |
4723 | Reloc_section* rela_dyn = this->rela_dyn_section(layout); | |
dd93cd0a AM |
4724 | Output_data_got_powerpc<size, big_endian>* got |
4725 | = this->got_section(symtab, layout); | |
4726 | unsigned int got_offset = got->add_constant_pair(0, 0); | |
42cacb20 DE |
4727 | rela_dyn->add_local(object, 0, elfcpp::R_POWERPC_DTPMOD, got, |
4728 | got_offset, 0); | |
dd93cd0a | 4729 | this->tlsld_got_offset_ = got_offset; |
42cacb20 | 4730 | } |
dd93cd0a | 4731 | return this->tlsld_got_offset_; |
42cacb20 DE |
4732 | } |
4733 | ||
95a2c8d6 RS |
4734 | // Get the Reference_flags for a particular relocation. |
4735 | ||
4736 | template<int size, bool big_endian> | |
4737 | int | |
d83ce4e3 | 4738 | Target_powerpc<size, big_endian>::Scan::get_reference_flags(unsigned int r_type) |
95a2c8d6 RS |
4739 | { |
4740 | switch (r_type) | |
4741 | { | |
4742 | case elfcpp::R_POWERPC_NONE: | |
4743 | case elfcpp::R_POWERPC_GNU_VTINHERIT: | |
4744 | case elfcpp::R_POWERPC_GNU_VTENTRY: | |
4745 | case elfcpp::R_PPC64_TOC: | |
4746 | // No symbol reference. | |
4747 | return 0; | |
4748 | ||
dd93cd0a AM |
4749 | case elfcpp::R_PPC64_ADDR64: |
4750 | case elfcpp::R_PPC64_UADDR64: | |
4751 | case elfcpp::R_POWERPC_ADDR32: | |
4752 | case elfcpp::R_POWERPC_UADDR32: | |
95a2c8d6 | 4753 | case elfcpp::R_POWERPC_ADDR16: |
dd93cd0a | 4754 | case elfcpp::R_POWERPC_UADDR16: |
95a2c8d6 RS |
4755 | case elfcpp::R_POWERPC_ADDR16_LO: |
4756 | case elfcpp::R_POWERPC_ADDR16_HI: | |
4757 | case elfcpp::R_POWERPC_ADDR16_HA: | |
95a2c8d6 RS |
4758 | return Symbol::ABSOLUTE_REF; |
4759 | ||
dd93cd0a AM |
4760 | case elfcpp::R_POWERPC_ADDR24: |
4761 | case elfcpp::R_POWERPC_ADDR14: | |
4762 | case elfcpp::R_POWERPC_ADDR14_BRTAKEN: | |
4763 | case elfcpp::R_POWERPC_ADDR14_BRNTAKEN: | |
4764 | return Symbol::FUNCTION_CALL | Symbol::ABSOLUTE_REF; | |
4765 | ||
e5d5f5ed | 4766 | case elfcpp::R_PPC64_REL64: |
dd93cd0a | 4767 | case elfcpp::R_POWERPC_REL32: |
95a2c8d6 | 4768 | case elfcpp::R_PPC_LOCAL24PC: |
6ce78956 AM |
4769 | case elfcpp::R_POWERPC_REL16: |
4770 | case elfcpp::R_POWERPC_REL16_LO: | |
4771 | case elfcpp::R_POWERPC_REL16_HI: | |
4772 | case elfcpp::R_POWERPC_REL16_HA: | |
95a2c8d6 RS |
4773 | return Symbol::RELATIVE_REF; |
4774 | ||
dd93cd0a | 4775 | case elfcpp::R_POWERPC_REL24: |
95a2c8d6 | 4776 | case elfcpp::R_PPC_PLTREL24: |
dd93cd0a AM |
4777 | case elfcpp::R_POWERPC_REL14: |
4778 | case elfcpp::R_POWERPC_REL14_BRTAKEN: | |
4779 | case elfcpp::R_POWERPC_REL14_BRNTAKEN: | |
95a2c8d6 RS |
4780 | return Symbol::FUNCTION_CALL | Symbol::RELATIVE_REF; |
4781 | ||
4782 | case elfcpp::R_POWERPC_GOT16: | |
4783 | case elfcpp::R_POWERPC_GOT16_LO: | |
4784 | case elfcpp::R_POWERPC_GOT16_HI: | |
4785 | case elfcpp::R_POWERPC_GOT16_HA: | |
e5d5f5ed AM |
4786 | case elfcpp::R_PPC64_GOT16_DS: |
4787 | case elfcpp::R_PPC64_GOT16_LO_DS: | |
95a2c8d6 RS |
4788 | case elfcpp::R_PPC64_TOC16: |
4789 | case elfcpp::R_PPC64_TOC16_LO: | |
4790 | case elfcpp::R_PPC64_TOC16_HI: | |
4791 | case elfcpp::R_PPC64_TOC16_HA: | |
4792 | case elfcpp::R_PPC64_TOC16_DS: | |
4793 | case elfcpp::R_PPC64_TOC16_LO_DS: | |
4794 | // Absolute in GOT. | |
4795 | return Symbol::ABSOLUTE_REF; | |
4796 | ||
4797 | case elfcpp::R_POWERPC_GOT_TPREL16: | |
4798 | case elfcpp::R_POWERPC_TLS: | |
4799 | return Symbol::TLS_REF; | |
4800 | ||
4801 | case elfcpp::R_POWERPC_COPY: | |
4802 | case elfcpp::R_POWERPC_GLOB_DAT: | |
4803 | case elfcpp::R_POWERPC_JMP_SLOT: | |
4804 | case elfcpp::R_POWERPC_RELATIVE: | |
4805 | case elfcpp::R_POWERPC_DTPMOD: | |
4806 | default: | |
4807 | // Not expected. We will give an error later. | |
4808 | return 0; | |
4809 | } | |
4810 | } | |
4811 | ||
42cacb20 DE |
4812 | // Report an unsupported relocation against a local symbol. |
4813 | ||
4814 | template<int size, bool big_endian> | |
4815 | void | |
4816 | Target_powerpc<size, big_endian>::Scan::unsupported_reloc_local( | |
d83ce4e3 AM |
4817 | Sized_relobj_file<size, big_endian>* object, |
4818 | unsigned int r_type) | |
42cacb20 DE |
4819 | { |
4820 | gold_error(_("%s: unsupported reloc %u against local symbol"), | |
4821 | object->name().c_str(), r_type); | |
4822 | } | |
4823 | ||
4824 | // We are about to emit a dynamic relocation of type R_TYPE. If the | |
4825 | // dynamic linker does not support it, issue an error. | |
4826 | ||
4827 | template<int size, bool big_endian> | |
4828 | void | |
4829 | Target_powerpc<size, big_endian>::Scan::check_non_pic(Relobj* object, | |
4830 | unsigned int r_type) | |
4831 | { | |
4832 | gold_assert(r_type != elfcpp::R_POWERPC_NONE); | |
4833 | ||
4834 | // These are the relocation types supported by glibc for both 32-bit | |
4835 | // and 64-bit powerpc. | |
4836 | switch (r_type) | |
4837 | { | |
3ea0a085 | 4838 | case elfcpp::R_POWERPC_NONE: |
42cacb20 DE |
4839 | case elfcpp::R_POWERPC_RELATIVE: |
4840 | case elfcpp::R_POWERPC_GLOB_DAT: | |
4841 | case elfcpp::R_POWERPC_DTPMOD: | |
4842 | case elfcpp::R_POWERPC_DTPREL: | |
4843 | case elfcpp::R_POWERPC_TPREL: | |
4844 | case elfcpp::R_POWERPC_JMP_SLOT: | |
4845 | case elfcpp::R_POWERPC_COPY: | |
3ea0a085 | 4846 | case elfcpp::R_POWERPC_IRELATIVE: |
42cacb20 | 4847 | case elfcpp::R_POWERPC_ADDR32: |
3ea0a085 | 4848 | case elfcpp::R_POWERPC_UADDR32: |
42cacb20 | 4849 | case elfcpp::R_POWERPC_ADDR24: |
3ea0a085 AM |
4850 | case elfcpp::R_POWERPC_ADDR16: |
4851 | case elfcpp::R_POWERPC_UADDR16: | |
4852 | case elfcpp::R_POWERPC_ADDR16_LO: | |
4853 | case elfcpp::R_POWERPC_ADDR16_HI: | |
4854 | case elfcpp::R_POWERPC_ADDR16_HA: | |
4855 | case elfcpp::R_POWERPC_ADDR14: | |
4856 | case elfcpp::R_POWERPC_ADDR14_BRTAKEN: | |
4857 | case elfcpp::R_POWERPC_ADDR14_BRNTAKEN: | |
4858 | case elfcpp::R_POWERPC_REL32: | |
42cacb20 | 4859 | case elfcpp::R_POWERPC_REL24: |
3ea0a085 AM |
4860 | case elfcpp::R_POWERPC_TPREL16: |
4861 | case elfcpp::R_POWERPC_TPREL16_LO: | |
4862 | case elfcpp::R_POWERPC_TPREL16_HI: | |
4863 | case elfcpp::R_POWERPC_TPREL16_HA: | |
42cacb20 DE |
4864 | return; |
4865 | ||
4866 | default: | |
4867 | break; | |
4868 | } | |
4869 | ||
4870 | if (size == 64) | |
4871 | { | |
4872 | switch (r_type) | |
4873 | { | |
4874 | // These are the relocation types supported only on 64-bit. | |
4875 | case elfcpp::R_PPC64_ADDR64: | |
42cacb20 | 4876 | case elfcpp::R_PPC64_UADDR64: |
3ea0a085 | 4877 | case elfcpp::R_PPC64_JMP_IREL: |
42cacb20 | 4878 | case elfcpp::R_PPC64_ADDR16_DS: |
3ea0a085 | 4879 | case elfcpp::R_PPC64_ADDR16_LO_DS: |
42cacb20 DE |
4880 | case elfcpp::R_PPC64_ADDR16_HIGHER: |
4881 | case elfcpp::R_PPC64_ADDR16_HIGHEST: | |
4882 | case elfcpp::R_PPC64_ADDR16_HIGHERA: | |
4883 | case elfcpp::R_PPC64_ADDR16_HIGHESTA: | |
42cacb20 | 4884 | case elfcpp::R_PPC64_REL64: |
3ea0a085 AM |
4885 | case elfcpp::R_POWERPC_ADDR30: |
4886 | case elfcpp::R_PPC64_TPREL16_DS: | |
4887 | case elfcpp::R_PPC64_TPREL16_LO_DS: | |
4888 | case elfcpp::R_PPC64_TPREL16_HIGHER: | |
4889 | case elfcpp::R_PPC64_TPREL16_HIGHEST: | |
4890 | case elfcpp::R_PPC64_TPREL16_HIGHERA: | |
4891 | case elfcpp::R_PPC64_TPREL16_HIGHESTA: | |
42cacb20 DE |
4892 | return; |
4893 | ||
4894 | default: | |
4895 | break; | |
4896 | } | |
4897 | } | |
4898 | else | |
4899 | { | |
4900 | switch (r_type) | |
4901 | { | |
4902 | // These are the relocation types supported only on 32-bit. | |
3ea0a085 AM |
4903 | // ??? glibc ld.so doesn't need to support these. |
4904 | case elfcpp::R_POWERPC_DTPREL16: | |
4905 | case elfcpp::R_POWERPC_DTPREL16_LO: | |
4906 | case elfcpp::R_POWERPC_DTPREL16_HI: | |
4907 | case elfcpp::R_POWERPC_DTPREL16_HA: | |
4908 | return; | |
42cacb20 DE |
4909 | |
4910 | default: | |
4911 | break; | |
4912 | } | |
4913 | } | |
4914 | ||
4915 | // This prevents us from issuing more than one error per reloc | |
4916 | // section. But we can still wind up issuing more than one | |
4917 | // error per object file. | |
4918 | if (this->issued_non_pic_error_) | |
4919 | return; | |
33aea2fd | 4920 | gold_assert(parameters->options().output_is_position_independent()); |
42cacb20 DE |
4921 | object->error(_("requires unsupported dynamic reloc; " |
4922 | "recompile with -fPIC")); | |
4923 | this->issued_non_pic_error_ = true; | |
4924 | return; | |
4925 | } | |
4926 | ||
e5d5f5ed AM |
4927 | // Return whether we need to make a PLT entry for a relocation of the |
4928 | // given type against a STT_GNU_IFUNC symbol. | |
4929 | ||
4930 | template<int size, bool big_endian> | |
4931 | bool | |
4932 | Target_powerpc<size, big_endian>::Scan::reloc_needs_plt_for_ifunc( | |
4933 | Sized_relobj_file<size, big_endian>* object, | |
b3ccdeb5 AM |
4934 | unsigned int r_type, |
4935 | bool report_err) | |
e5d5f5ed | 4936 | { |
c9824451 AM |
4937 | // In non-pic code any reference will resolve to the plt call stub |
4938 | // for the ifunc symbol. | |
4939 | if (size == 32 && !parameters->options().output_is_position_independent()) | |
4940 | return true; | |
4941 | ||
e5d5f5ed AM |
4942 | switch (r_type) |
4943 | { | |
b3ccdeb5 | 4944 | // Word size refs from data sections are OK, but don't need a PLT entry. |
e5d5f5ed AM |
4945 | case elfcpp::R_POWERPC_ADDR32: |
4946 | case elfcpp::R_POWERPC_UADDR32: | |
4947 | if (size == 32) | |
b3ccdeb5 | 4948 | return false; |
e5d5f5ed AM |
4949 | break; |
4950 | ||
4951 | case elfcpp::R_PPC64_ADDR64: | |
4952 | case elfcpp::R_PPC64_UADDR64: | |
4953 | if (size == 64) | |
b3ccdeb5 | 4954 | return false; |
e5d5f5ed AM |
4955 | break; |
4956 | ||
b3ccdeb5 | 4957 | // GOT refs are good, but also don't need a PLT entry. |
e5d5f5ed AM |
4958 | case elfcpp::R_POWERPC_GOT16: |
4959 | case elfcpp::R_POWERPC_GOT16_LO: | |
4960 | case elfcpp::R_POWERPC_GOT16_HI: | |
4961 | case elfcpp::R_POWERPC_GOT16_HA: | |
4962 | case elfcpp::R_PPC64_GOT16_DS: | |
4963 | case elfcpp::R_PPC64_GOT16_LO_DS: | |
b3ccdeb5 | 4964 | return false; |
e5d5f5ed | 4965 | |
b3ccdeb5 | 4966 | // Function calls are good, and these do need a PLT entry. |
e5d5f5ed AM |
4967 | case elfcpp::R_POWERPC_ADDR24: |
4968 | case elfcpp::R_POWERPC_ADDR14: | |
4969 | case elfcpp::R_POWERPC_ADDR14_BRTAKEN: | |
4970 | case elfcpp::R_POWERPC_ADDR14_BRNTAKEN: | |
4971 | case elfcpp::R_POWERPC_REL24: | |
4972 | case elfcpp::R_PPC_PLTREL24: | |
4973 | case elfcpp::R_POWERPC_REL14: | |
4974 | case elfcpp::R_POWERPC_REL14_BRTAKEN: | |
4975 | case elfcpp::R_POWERPC_REL14_BRNTAKEN: | |
4976 | return true; | |
4977 | ||
4978 | default: | |
4979 | break; | |
4980 | } | |
4981 | ||
4982 | // Anything else is a problem. | |
4983 | // If we are building a static executable, the libc startup function | |
4984 | // responsible for applying indirect function relocations is going | |
4985 | // to complain about the reloc type. | |
4986 | // If we are building a dynamic executable, we will have a text | |
4987 | // relocation. The dynamic loader will set the text segment | |
4988 | // writable and non-executable to apply text relocations. So we'll | |
4989 | // segfault when trying to run the indirection function to resolve | |
4990 | // the reloc. | |
b3ccdeb5 AM |
4991 | if (report_err) |
4992 | gold_error(_("%s: unsupported reloc %u for IFUNC symbol"), | |
e5d5f5ed AM |
4993 | object->name().c_str(), r_type); |
4994 | return false; | |
4995 | } | |
4996 | ||
42cacb20 DE |
4997 | // Scan a relocation for a local symbol. |
4998 | ||
4999 | template<int size, bool big_endian> | |
5000 | inline void | |
5001 | Target_powerpc<size, big_endian>::Scan::local( | |
d83ce4e3 AM |
5002 | Symbol_table* symtab, |
5003 | Layout* layout, | |
5004 | Target_powerpc<size, big_endian>* target, | |
5005 | Sized_relobj_file<size, big_endian>* object, | |
5006 | unsigned int data_shndx, | |
5007 | Output_section* output_section, | |
5008 | const elfcpp::Rela<size, big_endian>& reloc, | |
5009 | unsigned int r_type, | |
e5d5f5ed | 5010 | const elfcpp::Sym<size, big_endian>& lsym, |
bfdfa4cd | 5011 | bool is_discarded) |
42cacb20 | 5012 | { |
e3deeb9c AM |
5013 | this->maybe_skip_tls_get_addr_call(r_type, NULL); |
5014 | ||
5015 | if ((size == 64 && r_type == elfcpp::R_PPC64_TLSGD) | |
5016 | || (size == 32 && r_type == elfcpp::R_PPC_TLSGD)) | |
5017 | { | |
5018 | this->expect_tls_get_addr_call(); | |
5019 | const tls::Tls_optimization tls_type = target->optimize_tls_gd(true); | |
5020 | if (tls_type != tls::TLSOPT_NONE) | |
5021 | this->skip_next_tls_get_addr_call(); | |
5022 | } | |
5023 | else if ((size == 64 && r_type == elfcpp::R_PPC64_TLSLD) | |
5024 | || (size == 32 && r_type == elfcpp::R_PPC_TLSLD)) | |
5025 | { | |
5026 | this->expect_tls_get_addr_call(); | |
5027 | const tls::Tls_optimization tls_type = target->optimize_tls_ld(); | |
5028 | if (tls_type != tls::TLSOPT_NONE) | |
5029 | this->skip_next_tls_get_addr_call(); | |
5030 | } | |
5031 | ||
dd93cd0a AM |
5032 | Powerpc_relobj<size, big_endian>* ppc_object |
5033 | = static_cast<Powerpc_relobj<size, big_endian>*>(object); | |
5034 | ||
bfdfa4cd AM |
5035 | if (is_discarded) |
5036 | { | |
5037 | if (size == 64 | |
5038 | && data_shndx == ppc_object->opd_shndx() | |
5039 | && r_type == elfcpp::R_PPC64_ADDR64) | |
5040 | ppc_object->set_opd_discard(reloc.get_r_offset()); | |
5041 | return; | |
5042 | } | |
5043 | ||
e5d5f5ed AM |
5044 | // A local STT_GNU_IFUNC symbol may require a PLT entry. |
5045 | bool is_ifunc = lsym.get_st_type() == elfcpp::STT_GNU_IFUNC; | |
b3ccdeb5 | 5046 | if (is_ifunc && this->reloc_needs_plt_for_ifunc(object, r_type, true)) |
40b469d7 | 5047 | { |
ec661b9d AM |
5048 | unsigned int r_sym = elfcpp::elf_r_sym<size>(reloc.get_r_info()); |
5049 | target->push_branch(ppc_object, data_shndx, reloc.get_r_offset(), | |
5050 | r_type, r_sym, reloc.get_r_addend()); | |
5051 | target->make_local_ifunc_plt_entry(symtab, layout, object, r_sym); | |
40b469d7 | 5052 | } |
e5d5f5ed | 5053 | |
42cacb20 DE |
5054 | switch (r_type) |
5055 | { | |
5056 | case elfcpp::R_POWERPC_NONE: | |
5057 | case elfcpp::R_POWERPC_GNU_VTINHERIT: | |
5058 | case elfcpp::R_POWERPC_GNU_VTENTRY: | |
6ce78956 | 5059 | case elfcpp::R_PPC64_TOCSAVE: |
dd93cd0a | 5060 | case elfcpp::R_PPC_EMB_MRKREF: |
7404fe1b | 5061 | case elfcpp::R_POWERPC_TLS: |
dd93cd0a AM |
5062 | break; |
5063 | ||
5064 | case elfcpp::R_PPC64_TOC: | |
5065 | { | |
5066 | Output_data_got_powerpc<size, big_endian>* got | |
5067 | = target->got_section(symtab, layout); | |
5068 | if (parameters->options().output_is_position_independent()) | |
5069 | { | |
bfdfa4cd AM |
5070 | Address off = reloc.get_r_offset(); |
5071 | if (size == 64 | |
5072 | && data_shndx == ppc_object->opd_shndx() | |
5073 | && ppc_object->get_opd_discard(off - 8)) | |
5074 | break; | |
5075 | ||
dd93cd0a | 5076 | Reloc_section* rela_dyn = target->rela_dyn_section(layout); |
bfdfa4cd | 5077 | Powerpc_relobj<size, big_endian>* symobj = ppc_object; |
dd93cd0a AM |
5078 | rela_dyn->add_output_section_relative(got->output_section(), |
5079 | elfcpp::R_POWERPC_RELATIVE, | |
5080 | output_section, | |
bfdfa4cd AM |
5081 | object, data_shndx, off, |
5082 | symobj->toc_base_offset()); | |
dd93cd0a AM |
5083 | } |
5084 | } | |
42cacb20 DE |
5085 | break; |
5086 | ||
5087 | case elfcpp::R_PPC64_ADDR64: | |
dd93cd0a | 5088 | case elfcpp::R_PPC64_UADDR64: |
42cacb20 | 5089 | case elfcpp::R_POWERPC_ADDR32: |
dd93cd0a AM |
5090 | case elfcpp::R_POWERPC_UADDR32: |
5091 | case elfcpp::R_POWERPC_ADDR24: | |
c9269dff | 5092 | case elfcpp::R_POWERPC_ADDR16: |
42cacb20 | 5093 | case elfcpp::R_POWERPC_ADDR16_LO: |
c9269dff AM |
5094 | case elfcpp::R_POWERPC_ADDR16_HI: |
5095 | case elfcpp::R_POWERPC_ADDR16_HA: | |
dd93cd0a AM |
5096 | case elfcpp::R_POWERPC_UADDR16: |
5097 | case elfcpp::R_PPC64_ADDR16_HIGHER: | |
5098 | case elfcpp::R_PPC64_ADDR16_HIGHERA: | |
5099 | case elfcpp::R_PPC64_ADDR16_HIGHEST: | |
5100 | case elfcpp::R_PPC64_ADDR16_HIGHESTA: | |
5101 | case elfcpp::R_PPC64_ADDR16_DS: | |
5102 | case elfcpp::R_PPC64_ADDR16_LO_DS: | |
5103 | case elfcpp::R_POWERPC_ADDR14: | |
5104 | case elfcpp::R_POWERPC_ADDR14_BRTAKEN: | |
5105 | case elfcpp::R_POWERPC_ADDR14_BRNTAKEN: | |
42cacb20 DE |
5106 | // If building a shared library (or a position-independent |
5107 | // executable), we need to create a dynamic relocation for | |
5108 | // this location. | |
c9824451 AM |
5109 | if (parameters->options().output_is_position_independent() |
5110 | || (size == 64 && is_ifunc)) | |
2e702c99 | 5111 | { |
b3ccdeb5 AM |
5112 | Reloc_section* rela_dyn = target->rela_dyn_section(symtab, layout, |
5113 | is_ifunc); | |
dd93cd0a AM |
5114 | if ((size == 32 && r_type == elfcpp::R_POWERPC_ADDR32) |
5115 | || (size == 64 && r_type == elfcpp::R_PPC64_ADDR64)) | |
2e702c99 RM |
5116 | { |
5117 | unsigned int r_sym = elfcpp::elf_r_sym<size>(reloc.get_r_info()); | |
b3ccdeb5 AM |
5118 | unsigned int dynrel = (is_ifunc ? elfcpp::R_POWERPC_IRELATIVE |
5119 | : elfcpp::R_POWERPC_RELATIVE); | |
e5d5f5ed | 5120 | rela_dyn->add_local_relative(object, r_sym, dynrel, |
dd93cd0a AM |
5121 | output_section, data_shndx, |
5122 | reloc.get_r_offset(), | |
c9824451 | 5123 | reloc.get_r_addend(), false); |
2e702c99 RM |
5124 | } |
5125 | else | |
5126 | { | |
dd93cd0a | 5127 | check_non_pic(object, r_type); |
42cacb20 | 5128 | unsigned int r_sym = elfcpp::elf_r_sym<size>(reloc.get_r_info()); |
dd93cd0a AM |
5129 | rela_dyn->add_local(object, r_sym, r_type, output_section, |
5130 | data_shndx, reloc.get_r_offset(), | |
5131 | reloc.get_r_addend()); | |
2e702c99 RM |
5132 | } |
5133 | } | |
42cacb20 DE |
5134 | break; |
5135 | ||
5136 | case elfcpp::R_POWERPC_REL24: | |
c9824451 | 5137 | case elfcpp::R_PPC_PLTREL24: |
42cacb20 | 5138 | case elfcpp::R_PPC_LOCAL24PC: |
ec661b9d AM |
5139 | case elfcpp::R_POWERPC_REL14: |
5140 | case elfcpp::R_POWERPC_REL14_BRTAKEN: | |
5141 | case elfcpp::R_POWERPC_REL14_BRNTAKEN: | |
b3ccdeb5 AM |
5142 | if (!is_ifunc) |
5143 | target->push_branch(ppc_object, data_shndx, reloc.get_r_offset(), | |
5144 | r_type, elfcpp::elf_r_sym<size>(reloc.get_r_info()), | |
5145 | reloc.get_r_addend()); | |
ec661b9d AM |
5146 | break; |
5147 | ||
5148 | case elfcpp::R_PPC64_REL64: | |
5149 | case elfcpp::R_POWERPC_REL32: | |
dd93cd0a | 5150 | case elfcpp::R_POWERPC_REL16: |
6ce78956 | 5151 | case elfcpp::R_POWERPC_REL16_LO: |
dd93cd0a | 5152 | case elfcpp::R_POWERPC_REL16_HI: |
6ce78956 | 5153 | case elfcpp::R_POWERPC_REL16_HA: |
dd93cd0a AM |
5154 | case elfcpp::R_POWERPC_SECTOFF: |
5155 | case elfcpp::R_POWERPC_TPREL16: | |
5156 | case elfcpp::R_POWERPC_DTPREL16: | |
5157 | case elfcpp::R_POWERPC_SECTOFF_LO: | |
5158 | case elfcpp::R_POWERPC_TPREL16_LO: | |
5159 | case elfcpp::R_POWERPC_DTPREL16_LO: | |
5160 | case elfcpp::R_POWERPC_SECTOFF_HI: | |
5161 | case elfcpp::R_POWERPC_TPREL16_HI: | |
5162 | case elfcpp::R_POWERPC_DTPREL16_HI: | |
5163 | case elfcpp::R_POWERPC_SECTOFF_HA: | |
5164 | case elfcpp::R_POWERPC_TPREL16_HA: | |
5165 | case elfcpp::R_POWERPC_DTPREL16_HA: | |
5166 | case elfcpp::R_PPC64_DTPREL16_HIGHER: | |
5167 | case elfcpp::R_PPC64_TPREL16_HIGHER: | |
5168 | case elfcpp::R_PPC64_DTPREL16_HIGHERA: | |
5169 | case elfcpp::R_PPC64_TPREL16_HIGHERA: | |
5170 | case elfcpp::R_PPC64_DTPREL16_HIGHEST: | |
5171 | case elfcpp::R_PPC64_TPREL16_HIGHEST: | |
5172 | case elfcpp::R_PPC64_DTPREL16_HIGHESTA: | |
5173 | case elfcpp::R_PPC64_TPREL16_HIGHESTA: | |
5174 | case elfcpp::R_PPC64_TPREL16_DS: | |
5175 | case elfcpp::R_PPC64_TPREL16_LO_DS: | |
5176 | case elfcpp::R_PPC64_DTPREL16_DS: | |
5177 | case elfcpp::R_PPC64_DTPREL16_LO_DS: | |
5178 | case elfcpp::R_PPC64_SECTOFF_DS: | |
5179 | case elfcpp::R_PPC64_SECTOFF_LO_DS: | |
5180 | case elfcpp::R_PPC64_TLSGD: | |
5181 | case elfcpp::R_PPC64_TLSLD: | |
42cacb20 DE |
5182 | break; |
5183 | ||
5184 | case elfcpp::R_POWERPC_GOT16: | |
5185 | case elfcpp::R_POWERPC_GOT16_LO: | |
5186 | case elfcpp::R_POWERPC_GOT16_HI: | |
5187 | case elfcpp::R_POWERPC_GOT16_HA: | |
dd93cd0a AM |
5188 | case elfcpp::R_PPC64_GOT16_DS: |
5189 | case elfcpp::R_PPC64_GOT16_LO_DS: | |
42cacb20 | 5190 | { |
c9269dff | 5191 | // The symbol requires a GOT entry. |
dd93cd0a AM |
5192 | Output_data_got_powerpc<size, big_endian>* got |
5193 | = target->got_section(symtab, layout); | |
5194 | unsigned int r_sym = elfcpp::elf_r_sym<size>(reloc.get_r_info()); | |
42cacb20 | 5195 | |
e5d5f5ed | 5196 | if (!parameters->options().output_is_position_independent()) |
42cacb20 | 5197 | { |
e5d5f5ed AM |
5198 | if (size == 32 && is_ifunc) |
5199 | got->add_local_plt(object, r_sym, GOT_TYPE_STANDARD); | |
5200 | else | |
5201 | got->add_local(object, r_sym, GOT_TYPE_STANDARD); | |
5202 | } | |
5203 | else if (!object->local_has_got_offset(r_sym, GOT_TYPE_STANDARD)) | |
5204 | { | |
5205 | // If we are generating a shared object or a pie, this | |
5206 | // symbol's GOT entry will be set by a dynamic relocation. | |
5207 | unsigned int off; | |
5208 | off = got->add_constant(0); | |
5209 | object->set_local_got_offset(r_sym, GOT_TYPE_STANDARD, off); | |
42cacb20 | 5210 | |
b3ccdeb5 AM |
5211 | Reloc_section* rela_dyn = target->rela_dyn_section(symtab, layout, |
5212 | is_ifunc); | |
5213 | unsigned int dynrel = (is_ifunc ? elfcpp::R_POWERPC_IRELATIVE | |
5214 | : elfcpp::R_POWERPC_RELATIVE); | |
e5d5f5ed | 5215 | rela_dyn->add_local_relative(object, r_sym, dynrel, |
c9824451 | 5216 | got, off, 0, false); |
2e702c99 | 5217 | } |
42cacb20 DE |
5218 | } |
5219 | break; | |
5220 | ||
cf43a2fe AM |
5221 | case elfcpp::R_PPC64_TOC16: |
5222 | case elfcpp::R_PPC64_TOC16_LO: | |
5223 | case elfcpp::R_PPC64_TOC16_HI: | |
5224 | case elfcpp::R_PPC64_TOC16_HA: | |
5225 | case elfcpp::R_PPC64_TOC16_DS: | |
5226 | case elfcpp::R_PPC64_TOC16_LO_DS: | |
42cacb20 DE |
5227 | // We need a GOT section. |
5228 | target->got_section(symtab, layout); | |
5229 | break; | |
5230 | ||
dd93cd0a AM |
5231 | case elfcpp::R_POWERPC_GOT_TLSGD16: |
5232 | case elfcpp::R_POWERPC_GOT_TLSGD16_LO: | |
5233 | case elfcpp::R_POWERPC_GOT_TLSGD16_HI: | |
5234 | case elfcpp::R_POWERPC_GOT_TLSGD16_HA: | |
5235 | { | |
5236 | const tls::Tls_optimization tls_type = target->optimize_tls_gd(true); | |
5237 | if (tls_type == tls::TLSOPT_NONE) | |
5238 | { | |
5239 | Output_data_got_powerpc<size, big_endian>* got | |
5240 | = target->got_section(symtab, layout); | |
5241 | unsigned int r_sym = elfcpp::elf_r_sym<size>(reloc.get_r_info()); | |
bd73a62d AM |
5242 | Reloc_section* rela_dyn = target->rela_dyn_section(layout); |
5243 | got->add_local_tls_pair(object, r_sym, GOT_TYPE_TLSGD, | |
5244 | rela_dyn, elfcpp::R_POWERPC_DTPMOD); | |
dd93cd0a AM |
5245 | } |
5246 | else if (tls_type == tls::TLSOPT_TO_LE) | |
5247 | { | |
5248 | // no GOT relocs needed for Local Exec. | |
5249 | } | |
5250 | else | |
5251 | gold_unreachable(); | |
5252 | } | |
42cacb20 DE |
5253 | break; |
5254 | ||
dd93cd0a AM |
5255 | case elfcpp::R_POWERPC_GOT_TLSLD16: |
5256 | case elfcpp::R_POWERPC_GOT_TLSLD16_LO: | |
5257 | case elfcpp::R_POWERPC_GOT_TLSLD16_HI: | |
5258 | case elfcpp::R_POWERPC_GOT_TLSLD16_HA: | |
5259 | { | |
5260 | const tls::Tls_optimization tls_type = target->optimize_tls_ld(); | |
5261 | if (tls_type == tls::TLSOPT_NONE) | |
5262 | target->tlsld_got_offset(symtab, layout, object); | |
5263 | else if (tls_type == tls::TLSOPT_TO_LE) | |
5264 | { | |
5265 | // no GOT relocs needed for Local Exec. | |
7404fe1b AM |
5266 | if (parameters->options().emit_relocs()) |
5267 | { | |
5268 | Output_section* os = layout->tls_segment()->first_section(); | |
5269 | gold_assert(os != NULL); | |
5270 | os->set_needs_symtab_index(); | |
5271 | } | |
dd93cd0a AM |
5272 | } |
5273 | else | |
5274 | gold_unreachable(); | |
5275 | } | |
42cacb20 | 5276 | break; |
42cacb20 | 5277 | |
dd93cd0a AM |
5278 | case elfcpp::R_POWERPC_GOT_DTPREL16: |
5279 | case elfcpp::R_POWERPC_GOT_DTPREL16_LO: | |
5280 | case elfcpp::R_POWERPC_GOT_DTPREL16_HI: | |
5281 | case elfcpp::R_POWERPC_GOT_DTPREL16_HA: | |
5282 | { | |
5283 | Output_data_got_powerpc<size, big_endian>* got | |
5284 | = target->got_section(symtab, layout); | |
5285 | unsigned int r_sym = elfcpp::elf_r_sym<size>(reloc.get_r_info()); | |
bd73a62d | 5286 | got->add_local_tls(object, r_sym, GOT_TYPE_DTPREL); |
dd93cd0a AM |
5287 | } |
5288 | break; | |
42cacb20 | 5289 | |
dd93cd0a AM |
5290 | case elfcpp::R_POWERPC_GOT_TPREL16: |
5291 | case elfcpp::R_POWERPC_GOT_TPREL16_LO: | |
5292 | case elfcpp::R_POWERPC_GOT_TPREL16_HI: | |
5293 | case elfcpp::R_POWERPC_GOT_TPREL16_HA: | |
5294 | { | |
5295 | const tls::Tls_optimization tls_type = target->optimize_tls_ie(true); | |
5296 | if (tls_type == tls::TLSOPT_NONE) | |
5297 | { | |
dd93cd0a | 5298 | unsigned int r_sym = elfcpp::elf_r_sym<size>(reloc.get_r_info()); |
acc276d8 AM |
5299 | if (!object->local_has_got_offset(r_sym, GOT_TYPE_TPREL)) |
5300 | { | |
5301 | Output_data_got_powerpc<size, big_endian>* got | |
5302 | = target->got_section(symtab, layout); | |
5303 | unsigned int off = got->add_constant(0); | |
5304 | object->set_local_got_offset(r_sym, GOT_TYPE_TPREL, off); | |
5305 | ||
5306 | Reloc_section* rela_dyn = target->rela_dyn_section(layout); | |
5307 | rela_dyn->add_symbolless_local_addend(object, r_sym, | |
5308 | elfcpp::R_POWERPC_TPREL, | |
5309 | got, off, 0); | |
5310 | } | |
dd93cd0a AM |
5311 | } |
5312 | else if (tls_type == tls::TLSOPT_TO_LE) | |
5313 | { | |
5314 | // no GOT relocs needed for Local Exec. | |
5315 | } | |
5316 | else | |
5317 | gold_unreachable(); | |
5318 | } | |
5319 | break; | |
5320 | ||
5321 | default: | |
5322 | unsupported_reloc_local(object, r_type); | |
5323 | break; | |
5324 | } | |
d8f5a274 AM |
5325 | |
5326 | switch (r_type) | |
5327 | { | |
5328 | case elfcpp::R_POWERPC_GOT_TLSLD16: | |
5329 | case elfcpp::R_POWERPC_GOT_TLSGD16: | |
5330 | case elfcpp::R_POWERPC_GOT_TPREL16: | |
5331 | case elfcpp::R_POWERPC_GOT_DTPREL16: | |
5332 | case elfcpp::R_POWERPC_GOT16: | |
5333 | case elfcpp::R_PPC64_GOT16_DS: | |
5334 | case elfcpp::R_PPC64_TOC16: | |
5335 | case elfcpp::R_PPC64_TOC16_DS: | |
5336 | ppc_object->set_has_small_toc_reloc(); | |
5337 | default: | |
5338 | break; | |
5339 | } | |
dd93cd0a AM |
5340 | } |
5341 | ||
5342 | // Report an unsupported relocation against a global symbol. | |
5343 | ||
5344 | template<int size, bool big_endian> | |
5345 | void | |
5346 | Target_powerpc<size, big_endian>::Scan::unsupported_reloc_global( | |
5347 | Sized_relobj_file<size, big_endian>* object, | |
5348 | unsigned int r_type, | |
5349 | Symbol* gsym) | |
5350 | { | |
42cacb20 DE |
5351 | gold_error(_("%s: unsupported reloc %u against global symbol %s"), |
5352 | object->name().c_str(), r_type, gsym->demangled_name().c_str()); | |
5353 | } | |
5354 | ||
5355 | // Scan a relocation for a global symbol. | |
5356 | ||
5357 | template<int size, bool big_endian> | |
5358 | inline void | |
5359 | Target_powerpc<size, big_endian>::Scan::global( | |
d83ce4e3 AM |
5360 | Symbol_table* symtab, |
5361 | Layout* layout, | |
5362 | Target_powerpc<size, big_endian>* target, | |
5363 | Sized_relobj_file<size, big_endian>* object, | |
5364 | unsigned int data_shndx, | |
5365 | Output_section* output_section, | |
5366 | const elfcpp::Rela<size, big_endian>& reloc, | |
5367 | unsigned int r_type, | |
5368 | Symbol* gsym) | |
42cacb20 | 5369 | { |
e3deeb9c AM |
5370 | if (this->maybe_skip_tls_get_addr_call(r_type, gsym) == Track_tls::SKIP) |
5371 | return; | |
5372 | ||
5373 | if ((size == 64 && r_type == elfcpp::R_PPC64_TLSGD) | |
5374 | || (size == 32 && r_type == elfcpp::R_PPC_TLSGD)) | |
5375 | { | |
5376 | this->expect_tls_get_addr_call(); | |
5377 | const bool final = gsym->final_value_is_known(); | |
5378 | const tls::Tls_optimization tls_type = target->optimize_tls_gd(final); | |
5379 | if (tls_type != tls::TLSOPT_NONE) | |
5380 | this->skip_next_tls_get_addr_call(); | |
5381 | } | |
5382 | else if ((size == 64 && r_type == elfcpp::R_PPC64_TLSLD) | |
5383 | || (size == 32 && r_type == elfcpp::R_PPC_TLSLD)) | |
5384 | { | |
5385 | this->expect_tls_get_addr_call(); | |
5386 | const tls::Tls_optimization tls_type = target->optimize_tls_ld(); | |
5387 | if (tls_type != tls::TLSOPT_NONE) | |
5388 | this->skip_next_tls_get_addr_call(); | |
5389 | } | |
5390 | ||
dd93cd0a AM |
5391 | Powerpc_relobj<size, big_endian>* ppc_object |
5392 | = static_cast<Powerpc_relobj<size, big_endian>*>(object); | |
5393 | ||
e5d5f5ed | 5394 | // A STT_GNU_IFUNC symbol may require a PLT entry. |
b3ccdeb5 AM |
5395 | bool is_ifunc = gsym->type() == elfcpp::STT_GNU_IFUNC; |
5396 | if (is_ifunc && this->reloc_needs_plt_for_ifunc(object, r_type, true)) | |
ec661b9d AM |
5397 | { |
5398 | target->push_branch(ppc_object, data_shndx, reloc.get_r_offset(), | |
5399 | r_type, elfcpp::elf_r_sym<size>(reloc.get_r_info()), | |
5400 | reloc.get_r_addend()); | |
5401 | target->make_plt_entry(symtab, layout, gsym); | |
5402 | } | |
e5d5f5ed | 5403 | |
42cacb20 DE |
5404 | switch (r_type) |
5405 | { | |
5406 | case elfcpp::R_POWERPC_NONE: | |
5407 | case elfcpp::R_POWERPC_GNU_VTINHERIT: | |
5408 | case elfcpp::R_POWERPC_GNU_VTENTRY: | |
cf43a2fe | 5409 | case elfcpp::R_PPC_LOCAL24PC: |
dd93cd0a | 5410 | case elfcpp::R_PPC_EMB_MRKREF: |
7404fe1b | 5411 | case elfcpp::R_POWERPC_TLS: |
dd93cd0a AM |
5412 | break; |
5413 | ||
5414 | case elfcpp::R_PPC64_TOC: | |
5415 | { | |
5416 | Output_data_got_powerpc<size, big_endian>* got | |
5417 | = target->got_section(symtab, layout); | |
5418 | if (parameters->options().output_is_position_independent()) | |
5419 | { | |
bfdfa4cd AM |
5420 | Address off = reloc.get_r_offset(); |
5421 | if (size == 64 | |
5422 | && data_shndx == ppc_object->opd_shndx() | |
5423 | && ppc_object->get_opd_discard(off - 8)) | |
5424 | break; | |
5425 | ||
dd93cd0a AM |
5426 | Reloc_section* rela_dyn = target->rela_dyn_section(layout); |
5427 | Powerpc_relobj<size, big_endian>* symobj = ppc_object; | |
5428 | if (data_shndx != ppc_object->opd_shndx()) | |
5429 | symobj = static_cast | |
5430 | <Powerpc_relobj<size, big_endian>*>(gsym->object()); | |
5431 | rela_dyn->add_output_section_relative(got->output_section(), | |
5432 | elfcpp::R_POWERPC_RELATIVE, | |
5433 | output_section, | |
bfdfa4cd | 5434 | object, data_shndx, off, |
dd93cd0a AM |
5435 | symobj->toc_base_offset()); |
5436 | } | |
5437 | } | |
42cacb20 DE |
5438 | break; |
5439 | ||
c9269dff | 5440 | case elfcpp::R_PPC64_ADDR64: |
bfdfa4cd AM |
5441 | if (size == 64 |
5442 | && data_shndx == ppc_object->opd_shndx() | |
5443 | && (gsym->is_defined_in_discarded_section() | |
5444 | || gsym->object() != object)) | |
5445 | { | |
5446 | ppc_object->set_opd_discard(reloc.get_r_offset()); | |
5447 | break; | |
5448 | } | |
5449 | // Fall thru | |
dd93cd0a | 5450 | case elfcpp::R_PPC64_UADDR64: |
c9269dff | 5451 | case elfcpp::R_POWERPC_ADDR32: |
dd93cd0a AM |
5452 | case elfcpp::R_POWERPC_UADDR32: |
5453 | case elfcpp::R_POWERPC_ADDR24: | |
42cacb20 DE |
5454 | case elfcpp::R_POWERPC_ADDR16: |
5455 | case elfcpp::R_POWERPC_ADDR16_LO: | |
5456 | case elfcpp::R_POWERPC_ADDR16_HI: | |
5457 | case elfcpp::R_POWERPC_ADDR16_HA: | |
dd93cd0a AM |
5458 | case elfcpp::R_POWERPC_UADDR16: |
5459 | case elfcpp::R_PPC64_ADDR16_HIGHER: | |
5460 | case elfcpp::R_PPC64_ADDR16_HIGHERA: | |
5461 | case elfcpp::R_PPC64_ADDR16_HIGHEST: | |
5462 | case elfcpp::R_PPC64_ADDR16_HIGHESTA: | |
5463 | case elfcpp::R_PPC64_ADDR16_DS: | |
5464 | case elfcpp::R_PPC64_ADDR16_LO_DS: | |
5465 | case elfcpp::R_POWERPC_ADDR14: | |
5466 | case elfcpp::R_POWERPC_ADDR14_BRTAKEN: | |
5467 | case elfcpp::R_POWERPC_ADDR14_BRNTAKEN: | |
42cacb20 | 5468 | { |
c9269dff AM |
5469 | // Make a PLT entry if necessary. |
5470 | if (gsym->needs_plt_entry()) | |
5471 | { | |
b3ccdeb5 AM |
5472 | if (!is_ifunc) |
5473 | { | |
5474 | target->push_branch(ppc_object, data_shndx, | |
5475 | reloc.get_r_offset(), r_type, | |
5476 | elfcpp::elf_r_sym<size>(reloc.get_r_info()), | |
5477 | reloc.get_r_addend()); | |
5478 | target->make_plt_entry(symtab, layout, gsym); | |
5479 | } | |
2e702c99 RM |
5480 | // Since this is not a PC-relative relocation, we may be |
5481 | // taking the address of a function. In that case we need to | |
5482 | // set the entry in the dynamic symbol table to the address of | |
e5d5f5ed | 5483 | // the PLT call stub. |
cf43a2fe | 5484 | if (size == 32 |
e5d5f5ed AM |
5485 | && gsym->is_from_dynobj() |
5486 | && !parameters->options().output_is_position_independent()) | |
2e702c99 | 5487 | gsym->set_needs_dynsym_value(); |
c9269dff AM |
5488 | } |
5489 | // Make a dynamic relocation if necessary. | |
c9824451 | 5490 | if (needs_dynamic_reloc<size>(gsym, Scan::get_reference_flags(r_type)) |
b3ccdeb5 | 5491 | || (size == 64 && is_ifunc)) |
c9269dff AM |
5492 | { |
5493 | if (gsym->may_need_copy_reloc()) | |
5494 | { | |
5495 | target->copy_reloc(symtab, layout, object, | |
5496 | data_shndx, output_section, gsym, reloc); | |
5497 | } | |
627b30b7 AM |
5498 | else if ((size == 32 |
5499 | && r_type == elfcpp::R_POWERPC_ADDR32 | |
5500 | && gsym->can_use_relative_reloc(false) | |
5501 | && !(gsym->visibility() == elfcpp::STV_PROTECTED | |
5502 | && parameters->options().shared())) | |
5503 | || (size == 64 | |
5504 | && r_type == elfcpp::R_PPC64_ADDR64 | |
5505 | && (gsym->can_use_relative_reloc(false) | |
5506 | || data_shndx == ppc_object->opd_shndx()))) | |
2e702c99 | 5507 | { |
b3ccdeb5 AM |
5508 | Reloc_section* rela_dyn |
5509 | = target->rela_dyn_section(symtab, layout, is_ifunc); | |
5510 | unsigned int dynrel = (is_ifunc ? elfcpp::R_POWERPC_IRELATIVE | |
5511 | : elfcpp::R_POWERPC_RELATIVE); | |
e5d5f5ed AM |
5512 | rela_dyn->add_symbolless_global_addend( |
5513 | gsym, dynrel, output_section, object, data_shndx, | |
5514 | reloc.get_r_offset(), reloc.get_r_addend()); | |
2e702c99 RM |
5515 | } |
5516 | else | |
5517 | { | |
b3ccdeb5 AM |
5518 | Reloc_section* rela_dyn |
5519 | = target->rela_dyn_section(symtab, layout, is_ifunc); | |
42cacb20 | 5520 | check_non_pic(object, r_type); |
dd93cd0a AM |
5521 | rela_dyn->add_global(gsym, r_type, output_section, |
5522 | object, data_shndx, | |
5523 | reloc.get_r_offset(), | |
5524 | reloc.get_r_addend()); | |
2e702c99 RM |
5525 | } |
5526 | } | |
42cacb20 DE |
5527 | } |
5528 | break; | |
5529 | ||
cf43a2fe | 5530 | case elfcpp::R_PPC_PLTREL24: |
42cacb20 | 5531 | case elfcpp::R_POWERPC_REL24: |
b3ccdeb5 AM |
5532 | if (!is_ifunc) |
5533 | { | |
5534 | target->push_branch(ppc_object, data_shndx, reloc.get_r_offset(), | |
5535 | r_type, | |
5536 | elfcpp::elf_r_sym<size>(reloc.get_r_info()), | |
5537 | reloc.get_r_addend()); | |
5538 | if (gsym->needs_plt_entry() | |
5539 | || (!gsym->final_value_is_known() | |
5540 | && (gsym->is_undefined() | |
5541 | || gsym->is_from_dynobj() | |
5542 | || gsym->is_preemptible()))) | |
5543 | target->make_plt_entry(symtab, layout, gsym); | |
5544 | } | |
3ea0a085 | 5545 | // Fall thru |
42cacb20 | 5546 | |
3ea0a085 | 5547 | case elfcpp::R_PPC64_REL64: |
dd93cd0a | 5548 | case elfcpp::R_POWERPC_REL32: |
3ea0a085 AM |
5549 | // Make a dynamic relocation if necessary. |
5550 | if (needs_dynamic_reloc<size>(gsym, Scan::get_reference_flags(r_type))) | |
5551 | { | |
5552 | if (gsym->may_need_copy_reloc()) | |
5553 | { | |
5554 | target->copy_reloc(symtab, layout, object, | |
5555 | data_shndx, output_section, gsym, | |
5556 | reloc); | |
5557 | } | |
5558 | else | |
5559 | { | |
b3ccdeb5 AM |
5560 | Reloc_section* rela_dyn |
5561 | = target->rela_dyn_section(symtab, layout, is_ifunc); | |
3ea0a085 AM |
5562 | check_non_pic(object, r_type); |
5563 | rela_dyn->add_global(gsym, r_type, output_section, object, | |
5564 | data_shndx, reloc.get_r_offset(), | |
5565 | reloc.get_r_addend()); | |
5566 | } | |
5567 | } | |
5568 | break; | |
5569 | ||
ec661b9d AM |
5570 | case elfcpp::R_POWERPC_REL14: |
5571 | case elfcpp::R_POWERPC_REL14_BRTAKEN: | |
5572 | case elfcpp::R_POWERPC_REL14_BRNTAKEN: | |
b3ccdeb5 AM |
5573 | if (!is_ifunc) |
5574 | target->push_branch(ppc_object, data_shndx, reloc.get_r_offset(), | |
5575 | r_type, elfcpp::elf_r_sym<size>(reloc.get_r_info()), | |
5576 | reloc.get_r_addend()); | |
ec661b9d AM |
5577 | break; |
5578 | ||
6ce78956 AM |
5579 | case elfcpp::R_POWERPC_REL16: |
5580 | case elfcpp::R_POWERPC_REL16_LO: | |
5581 | case elfcpp::R_POWERPC_REL16_HI: | |
5582 | case elfcpp::R_POWERPC_REL16_HA: | |
dd93cd0a AM |
5583 | case elfcpp::R_POWERPC_SECTOFF: |
5584 | case elfcpp::R_POWERPC_TPREL16: | |
5585 | case elfcpp::R_POWERPC_DTPREL16: | |
5586 | case elfcpp::R_POWERPC_SECTOFF_LO: | |
5587 | case elfcpp::R_POWERPC_TPREL16_LO: | |
5588 | case elfcpp::R_POWERPC_DTPREL16_LO: | |
5589 | case elfcpp::R_POWERPC_SECTOFF_HI: | |
5590 | case elfcpp::R_POWERPC_TPREL16_HI: | |
5591 | case elfcpp::R_POWERPC_DTPREL16_HI: | |
5592 | case elfcpp::R_POWERPC_SECTOFF_HA: | |
5593 | case elfcpp::R_POWERPC_TPREL16_HA: | |
5594 | case elfcpp::R_POWERPC_DTPREL16_HA: | |
5595 | case elfcpp::R_PPC64_DTPREL16_HIGHER: | |
5596 | case elfcpp::R_PPC64_TPREL16_HIGHER: | |
5597 | case elfcpp::R_PPC64_DTPREL16_HIGHERA: | |
5598 | case elfcpp::R_PPC64_TPREL16_HIGHERA: | |
5599 | case elfcpp::R_PPC64_DTPREL16_HIGHEST: | |
5600 | case elfcpp::R_PPC64_TPREL16_HIGHEST: | |
5601 | case elfcpp::R_PPC64_DTPREL16_HIGHESTA: | |
5602 | case elfcpp::R_PPC64_TPREL16_HIGHESTA: | |
5603 | case elfcpp::R_PPC64_TPREL16_DS: | |
5604 | case elfcpp::R_PPC64_TPREL16_LO_DS: | |
5605 | case elfcpp::R_PPC64_DTPREL16_DS: | |
5606 | case elfcpp::R_PPC64_DTPREL16_LO_DS: | |
5607 | case elfcpp::R_PPC64_SECTOFF_DS: | |
5608 | case elfcpp::R_PPC64_SECTOFF_LO_DS: | |
5609 | case elfcpp::R_PPC64_TLSGD: | |
5610 | case elfcpp::R_PPC64_TLSLD: | |
cf43a2fe AM |
5611 | break; |
5612 | ||
42cacb20 DE |
5613 | case elfcpp::R_POWERPC_GOT16: |
5614 | case elfcpp::R_POWERPC_GOT16_LO: | |
5615 | case elfcpp::R_POWERPC_GOT16_HI: | |
5616 | case elfcpp::R_POWERPC_GOT16_HA: | |
dd93cd0a AM |
5617 | case elfcpp::R_PPC64_GOT16_DS: |
5618 | case elfcpp::R_PPC64_GOT16_LO_DS: | |
42cacb20 | 5619 | { |
c9269dff AM |
5620 | // The symbol requires a GOT entry. |
5621 | Output_data_got_powerpc<size, big_endian>* got; | |
42cacb20 DE |
5622 | |
5623 | got = target->got_section(symtab, layout); | |
2e702c99 | 5624 | if (gsym->final_value_is_known()) |
2e702c99 | 5625 | { |
b3ccdeb5 | 5626 | if (size == 32 && is_ifunc) |
e5d5f5ed AM |
5627 | got->add_global_plt(gsym, GOT_TYPE_STANDARD); |
5628 | else | |
5629 | got->add_global(gsym, GOT_TYPE_STANDARD); | |
5630 | } | |
5631 | else if (!gsym->has_got_offset(GOT_TYPE_STANDARD)) | |
5632 | { | |
5633 | // If we are generating a shared object or a pie, this | |
5634 | // symbol's GOT entry will be set by a dynamic relocation. | |
5635 | unsigned int off = got->add_constant(0); | |
5636 | gsym->set_got_offset(GOT_TYPE_STANDARD, off); | |
5637 | ||
b3ccdeb5 AM |
5638 | Reloc_section* rela_dyn |
5639 | = target->rela_dyn_section(symtab, layout, is_ifunc); | |
5640 | ||
e5d5f5ed AM |
5641 | if (gsym->can_use_relative_reloc(false) |
5642 | && !(size == 32 | |
5643 | && gsym->visibility() == elfcpp::STV_PROTECTED | |
5644 | && parameters->options().shared())) | |
2e702c99 | 5645 | { |
b3ccdeb5 AM |
5646 | unsigned int dynrel = (is_ifunc ? elfcpp::R_POWERPC_IRELATIVE |
5647 | : elfcpp::R_POWERPC_RELATIVE); | |
e5d5f5ed AM |
5648 | rela_dyn->add_global_relative(gsym, dynrel, got, off, 0, false); |
5649 | } | |
5650 | else | |
5651 | { | |
5652 | unsigned int dynrel = elfcpp::R_POWERPC_GLOB_DAT; | |
5653 | rela_dyn->add_global(gsym, dynrel, got, off, 0); | |
42cacb20 | 5654 | } |
2e702c99 | 5655 | } |
42cacb20 DE |
5656 | } |
5657 | break; | |
5658 | ||
cf43a2fe AM |
5659 | case elfcpp::R_PPC64_TOC16: |
5660 | case elfcpp::R_PPC64_TOC16_LO: | |
5661 | case elfcpp::R_PPC64_TOC16_HI: | |
5662 | case elfcpp::R_PPC64_TOC16_HA: | |
5663 | case elfcpp::R_PPC64_TOC16_DS: | |
5664 | case elfcpp::R_PPC64_TOC16_LO_DS: | |
42cacb20 DE |
5665 | // We need a GOT section. |
5666 | target->got_section(symtab, layout); | |
5667 | break; | |
5668 | ||
dd93cd0a AM |
5669 | case elfcpp::R_POWERPC_GOT_TLSGD16: |
5670 | case elfcpp::R_POWERPC_GOT_TLSGD16_LO: | |
5671 | case elfcpp::R_POWERPC_GOT_TLSGD16_HI: | |
5672 | case elfcpp::R_POWERPC_GOT_TLSGD16_HA: | |
5673 | { | |
5674 | const bool final = gsym->final_value_is_known(); | |
5675 | const tls::Tls_optimization tls_type = target->optimize_tls_gd(final); | |
5676 | if (tls_type == tls::TLSOPT_NONE) | |
5677 | { | |
5678 | Output_data_got_powerpc<size, big_endian>* got | |
5679 | = target->got_section(symtab, layout); | |
b3ccdeb5 AM |
5680 | Reloc_section* rela_dyn = target->rela_dyn_section(layout); |
5681 | got->add_global_pair_with_rel(gsym, GOT_TYPE_TLSGD, rela_dyn, | |
dd93cd0a AM |
5682 | elfcpp::R_POWERPC_DTPMOD, |
5683 | elfcpp::R_POWERPC_DTPREL); | |
5684 | } | |
5685 | else if (tls_type == tls::TLSOPT_TO_IE) | |
5686 | { | |
acc276d8 AM |
5687 | if (!gsym->has_got_offset(GOT_TYPE_TPREL)) |
5688 | { | |
5689 | Output_data_got_powerpc<size, big_endian>* got | |
5690 | = target->got_section(symtab, layout); | |
5691 | Reloc_section* rela_dyn = target->rela_dyn_section(layout); | |
5692 | if (gsym->is_undefined() | |
5693 | || gsym->is_from_dynobj()) | |
5694 | { | |
5695 | got->add_global_with_rel(gsym, GOT_TYPE_TPREL, rela_dyn, | |
5696 | elfcpp::R_POWERPC_TPREL); | |
5697 | } | |
5698 | else | |
5699 | { | |
5700 | unsigned int off = got->add_constant(0); | |
5701 | gsym->set_got_offset(GOT_TYPE_TPREL, off); | |
5702 | unsigned int dynrel = elfcpp::R_POWERPC_TPREL; | |
5703 | rela_dyn->add_symbolless_global_addend(gsym, dynrel, | |
5704 | got, off, 0); | |
5705 | } | |
5706 | } | |
dd93cd0a AM |
5707 | } |
5708 | else if (tls_type == tls::TLSOPT_TO_LE) | |
5709 | { | |
5710 | // no GOT relocs needed for Local Exec. | |
5711 | } | |
5712 | else | |
5713 | gold_unreachable(); | |
5714 | } | |
42cacb20 DE |
5715 | break; |
5716 | ||
dd93cd0a AM |
5717 | case elfcpp::R_POWERPC_GOT_TLSLD16: |
5718 | case elfcpp::R_POWERPC_GOT_TLSLD16_LO: | |
5719 | case elfcpp::R_POWERPC_GOT_TLSLD16_HI: | |
5720 | case elfcpp::R_POWERPC_GOT_TLSLD16_HA: | |
5721 | { | |
5722 | const tls::Tls_optimization tls_type = target->optimize_tls_ld(); | |
5723 | if (tls_type == tls::TLSOPT_NONE) | |
5724 | target->tlsld_got_offset(symtab, layout, object); | |
5725 | else if (tls_type == tls::TLSOPT_TO_LE) | |
5726 | { | |
5727 | // no GOT relocs needed for Local Exec. | |
7404fe1b AM |
5728 | if (parameters->options().emit_relocs()) |
5729 | { | |
5730 | Output_section* os = layout->tls_segment()->first_section(); | |
5731 | gold_assert(os != NULL); | |
5732 | os->set_needs_symtab_index(); | |
5733 | } | |
dd93cd0a AM |
5734 | } |
5735 | else | |
5736 | gold_unreachable(); | |
5737 | } | |
5738 | break; | |
5739 | ||
5740 | case elfcpp::R_POWERPC_GOT_DTPREL16: | |
5741 | case elfcpp::R_POWERPC_GOT_DTPREL16_LO: | |
5742 | case elfcpp::R_POWERPC_GOT_DTPREL16_HI: | |
5743 | case elfcpp::R_POWERPC_GOT_DTPREL16_HA: | |
5744 | { | |
5745 | Output_data_got_powerpc<size, big_endian>* got | |
5746 | = target->got_section(symtab, layout); | |
bd73a62d AM |
5747 | if (!gsym->final_value_is_known() |
5748 | && (gsym->is_from_dynobj() | |
5749 | || gsym->is_undefined() | |
5750 | || gsym->is_preemptible())) | |
5751 | got->add_global_with_rel(gsym, GOT_TYPE_DTPREL, | |
5752 | target->rela_dyn_section(layout), | |
5753 | elfcpp::R_POWERPC_DTPREL); | |
5754 | else | |
5755 | got->add_global_tls(gsym, GOT_TYPE_DTPREL); | |
dd93cd0a AM |
5756 | } |
5757 | break; | |
5758 | ||
5759 | case elfcpp::R_POWERPC_GOT_TPREL16: | |
5760 | case elfcpp::R_POWERPC_GOT_TPREL16_LO: | |
5761 | case elfcpp::R_POWERPC_GOT_TPREL16_HI: | |
5762 | case elfcpp::R_POWERPC_GOT_TPREL16_HA: | |
5763 | { | |
5764 | const bool final = gsym->final_value_is_known(); | |
5765 | const tls::Tls_optimization tls_type = target->optimize_tls_ie(final); | |
5766 | if (tls_type == tls::TLSOPT_NONE) | |
5767 | { | |
acc276d8 AM |
5768 | if (!gsym->has_got_offset(GOT_TYPE_TPREL)) |
5769 | { | |
5770 | Output_data_got_powerpc<size, big_endian>* got | |
5771 | = target->got_section(symtab, layout); | |
5772 | Reloc_section* rela_dyn = target->rela_dyn_section(layout); | |
5773 | if (gsym->is_undefined() | |
5774 | || gsym->is_from_dynobj()) | |
5775 | { | |
5776 | got->add_global_with_rel(gsym, GOT_TYPE_TPREL, rela_dyn, | |
5777 | elfcpp::R_POWERPC_TPREL); | |
5778 | } | |
5779 | else | |
5780 | { | |
5781 | unsigned int off = got->add_constant(0); | |
5782 | gsym->set_got_offset(GOT_TYPE_TPREL, off); | |
5783 | unsigned int dynrel = elfcpp::R_POWERPC_TPREL; | |
5784 | rela_dyn->add_symbolless_global_addend(gsym, dynrel, | |
5785 | got, off, 0); | |
5786 | } | |
5787 | } | |
dd93cd0a AM |
5788 | } |
5789 | else if (tls_type == tls::TLSOPT_TO_LE) | |
5790 | { | |
5791 | // no GOT relocs needed for Local Exec. | |
5792 | } | |
5793 | else | |
5794 | gold_unreachable(); | |
5795 | } | |
42cacb20 DE |
5796 | break; |
5797 | ||
5798 | default: | |
5799 | unsupported_reloc_global(object, r_type, gsym); | |
5800 | break; | |
5801 | } | |
d8f5a274 AM |
5802 | |
5803 | switch (r_type) | |
5804 | { | |
5805 | case elfcpp::R_POWERPC_GOT_TLSLD16: | |
5806 | case elfcpp::R_POWERPC_GOT_TLSGD16: | |
5807 | case elfcpp::R_POWERPC_GOT_TPREL16: | |
5808 | case elfcpp::R_POWERPC_GOT_DTPREL16: | |
5809 | case elfcpp::R_POWERPC_GOT16: | |
5810 | case elfcpp::R_PPC64_GOT16_DS: | |
5811 | case elfcpp::R_PPC64_TOC16: | |
5812 | case elfcpp::R_PPC64_TOC16_DS: | |
5813 | ppc_object->set_has_small_toc_reloc(); | |
5814 | default: | |
5815 | break; | |
5816 | } | |
42cacb20 DE |
5817 | } |
5818 | ||
6d03d481 ST |
5819 | // Process relocations for gc. |
5820 | ||
5821 | template<int size, bool big_endian> | |
5822 | void | |
5823 | Target_powerpc<size, big_endian>::gc_process_relocs( | |
d83ce4e3 AM |
5824 | Symbol_table* symtab, |
5825 | Layout* layout, | |
5826 | Sized_relobj_file<size, big_endian>* object, | |
5827 | unsigned int data_shndx, | |
5828 | unsigned int, | |
5829 | const unsigned char* prelocs, | |
5830 | size_t reloc_count, | |
5831 | Output_section* output_section, | |
5832 | bool needs_special_offset_handling, | |
5833 | size_t local_symbol_count, | |
5834 | const unsigned char* plocal_symbols) | |
6d03d481 ST |
5835 | { |
5836 | typedef Target_powerpc<size, big_endian> Powerpc; | |
2ea97941 | 5837 | typedef typename Target_powerpc<size, big_endian>::Scan Scan; |
e81fea4d AM |
5838 | Powerpc_relobj<size, big_endian>* ppc_object |
5839 | = static_cast<Powerpc_relobj<size, big_endian>*>(object); | |
5840 | if (size == 64) | |
5841 | ppc_object->set_opd_valid(); | |
5842 | if (size == 64 && data_shndx == ppc_object->opd_shndx()) | |
5843 | { | |
5844 | typename Powerpc_relobj<size, big_endian>::Access_from::iterator p; | |
5845 | for (p = ppc_object->access_from_map()->begin(); | |
5846 | p != ppc_object->access_from_map()->end(); | |
5847 | ++p) | |
5848 | { | |
5849 | Address dst_off = p->first; | |
5850 | unsigned int dst_indx = ppc_object->get_opd_ent(dst_off); | |
5851 | typename Powerpc_relobj<size, big_endian>::Section_refs::iterator s; | |
5852 | for (s = p->second.begin(); s != p->second.end(); ++s) | |
5853 | { | |
5854 | Object* src_obj = s->first; | |
5855 | unsigned int src_indx = s->second; | |
5856 | symtab->gc()->add_reference(src_obj, src_indx, | |
5857 | ppc_object, dst_indx); | |
5858 | } | |
5859 | p->second.clear(); | |
5860 | } | |
5861 | ppc_object->access_from_map()->clear(); | |
c6de8ed4 | 5862 | ppc_object->process_gc_mark(symtab); |
e81fea4d AM |
5863 | // Don't look at .opd relocs as .opd will reference everything. |
5864 | return; | |
5865 | } | |
6d03d481 | 5866 | |
41cbeecc | 5867 | gold::gc_process_relocs<size, big_endian, Powerpc, elfcpp::SHT_RELA, Scan, |
3ff2ccb0 | 5868 | typename Target_powerpc::Relocatable_size_for_reloc>( |
6d03d481 ST |
5869 | symtab, |
5870 | layout, | |
5871 | this, | |
5872 | object, | |
5873 | data_shndx, | |
5874 | prelocs, | |
5875 | reloc_count, | |
5876 | output_section, | |
5877 | needs_special_offset_handling, | |
5878 | local_symbol_count, | |
5879 | plocal_symbols); | |
5880 | } | |
5881 | ||
e81fea4d AM |
5882 | // Handle target specific gc actions when adding a gc reference from |
5883 | // SRC_OBJ, SRC_SHNDX to a location specified by DST_OBJ, DST_SHNDX | |
5884 | // and DST_OFF. For powerpc64, this adds a referenc to the code | |
5885 | // section of a function descriptor. | |
5886 | ||
5887 | template<int size, bool big_endian> | |
5888 | void | |
5889 | Target_powerpc<size, big_endian>::do_gc_add_reference( | |
5890 | Symbol_table* symtab, | |
5891 | Object* src_obj, | |
5892 | unsigned int src_shndx, | |
5893 | Object* dst_obj, | |
5894 | unsigned int dst_shndx, | |
5895 | Address dst_off) const | |
5896 | { | |
6c77229c AM |
5897 | if (size != 64 || dst_obj->is_dynamic()) |
5898 | return; | |
5899 | ||
e81fea4d AM |
5900 | Powerpc_relobj<size, big_endian>* ppc_object |
5901 | = static_cast<Powerpc_relobj<size, big_endian>*>(dst_obj); | |
a2d7bf59 | 5902 | if (dst_shndx != 0 && dst_shndx == ppc_object->opd_shndx()) |
e81fea4d AM |
5903 | { |
5904 | if (ppc_object->opd_valid()) | |
5905 | { | |
5906 | dst_shndx = ppc_object->get_opd_ent(dst_off); | |
5907 | symtab->gc()->add_reference(src_obj, src_shndx, dst_obj, dst_shndx); | |
5908 | } | |
5909 | else | |
5910 | { | |
5911 | // If we haven't run scan_opd_relocs, we must delay | |
5912 | // processing this function descriptor reference. | |
5913 | ppc_object->add_reference(src_obj, src_shndx, dst_off); | |
5914 | } | |
5915 | } | |
5916 | } | |
5917 | ||
5918 | // Add any special sections for this symbol to the gc work list. | |
5919 | // For powerpc64, this adds the code section of a function | |
5920 | // descriptor. | |
5921 | ||
5922 | template<int size, bool big_endian> | |
5923 | void | |
5924 | Target_powerpc<size, big_endian>::do_gc_mark_symbol( | |
5925 | Symbol_table* symtab, | |
5926 | Symbol* sym) const | |
5927 | { | |
5928 | if (size == 64) | |
5929 | { | |
5930 | Powerpc_relobj<size, big_endian>* ppc_object | |
5931 | = static_cast<Powerpc_relobj<size, big_endian>*>(sym->object()); | |
5932 | bool is_ordinary; | |
5933 | unsigned int shndx = sym->shndx(&is_ordinary); | |
a2d7bf59 | 5934 | if (is_ordinary && shndx != 0 && shndx == ppc_object->opd_shndx()) |
e81fea4d AM |
5935 | { |
5936 | Sized_symbol<size>* gsym = symtab->get_sized_symbol<size>(sym); | |
5937 | Address dst_off = gsym->value(); | |
c6de8ed4 AM |
5938 | if (ppc_object->opd_valid()) |
5939 | { | |
5940 | unsigned int dst_indx = ppc_object->get_opd_ent(dst_off); | |
5941 | symtab->gc()->worklist().push(Section_id(ppc_object, dst_indx)); | |
5942 | } | |
5943 | else | |
5944 | ppc_object->add_gc_mark(dst_off); | |
e81fea4d AM |
5945 | } |
5946 | } | |
5947 | } | |
5948 | ||
dc3714f3 AM |
5949 | // For a symbol location in .opd, set LOC to the location of the |
5950 | // function entry. | |
5951 | ||
5952 | template<int size, bool big_endian> | |
5953 | void | |
5954 | Target_powerpc<size, big_endian>::do_function_location( | |
5955 | Symbol_location* loc) const | |
5956 | { | |
a2d7bf59 | 5957 | if (size == 64 && loc->shndx != 0) |
dc3714f3 AM |
5958 | { |
5959 | if (loc->object->is_dynamic()) | |
5960 | { | |
5961 | Powerpc_dynobj<size, big_endian>* ppc_object | |
5962 | = static_cast<Powerpc_dynobj<size, big_endian>*>(loc->object); | |
5963 | if (loc->shndx == ppc_object->opd_shndx()) | |
5964 | { | |
5965 | Address dest_off; | |
5966 | Address off = loc->offset - ppc_object->opd_address(); | |
5967 | loc->shndx = ppc_object->get_opd_ent(off, &dest_off); | |
5968 | loc->offset = dest_off; | |
5969 | } | |
5970 | } | |
5971 | else | |
5972 | { | |
5973 | const Powerpc_relobj<size, big_endian>* ppc_object | |
5974 | = static_cast<const Powerpc_relobj<size, big_endian>*>(loc->object); | |
5975 | if (loc->shndx == ppc_object->opd_shndx()) | |
5976 | { | |
5977 | Address dest_off; | |
5978 | loc->shndx = ppc_object->get_opd_ent(loc->offset, &dest_off); | |
5979 | loc->offset = dest_off; | |
5980 | } | |
5981 | } | |
5982 | } | |
5983 | } | |
5984 | ||
42cacb20 DE |
5985 | // Scan relocations for a section. |
5986 | ||
5987 | template<int size, bool big_endian> | |
5988 | void | |
5989 | Target_powerpc<size, big_endian>::scan_relocs( | |
d83ce4e3 AM |
5990 | Symbol_table* symtab, |
5991 | Layout* layout, | |
5992 | Sized_relobj_file<size, big_endian>* object, | |
5993 | unsigned int data_shndx, | |
5994 | unsigned int sh_type, | |
5995 | const unsigned char* prelocs, | |
5996 | size_t reloc_count, | |
5997 | Output_section* output_section, | |
5998 | bool needs_special_offset_handling, | |
5999 | size_t local_symbol_count, | |
6000 | const unsigned char* plocal_symbols) | |
42cacb20 DE |
6001 | { |
6002 | typedef Target_powerpc<size, big_endian> Powerpc; | |
2ea97941 | 6003 | typedef typename Target_powerpc<size, big_endian>::Scan Scan; |
42cacb20 DE |
6004 | |
6005 | if (sh_type == elfcpp::SHT_REL) | |
6006 | { | |
6007 | gold_error(_("%s: unsupported REL reloc section"), | |
6008 | object->name().c_str()); | |
6009 | return; | |
6010 | } | |
6011 | ||
2ea97941 | 6012 | gold::scan_relocs<size, big_endian, Powerpc, elfcpp::SHT_RELA, Scan>( |
42cacb20 DE |
6013 | symtab, |
6014 | layout, | |
6015 | this, | |
6016 | object, | |
6017 | data_shndx, | |
6018 | prelocs, | |
6019 | reloc_count, | |
6020 | output_section, | |
6021 | needs_special_offset_handling, | |
6022 | local_symbol_count, | |
6023 | plocal_symbols); | |
6024 | } | |
6025 | ||
ec4dbad3 AM |
6026 | // Functor class for processing the global symbol table. |
6027 | // Removes symbols defined on discarded opd entries. | |
6028 | ||
6029 | template<bool big_endian> | |
6030 | class Global_symbol_visitor_opd | |
6031 | { | |
6032 | public: | |
6033 | Global_symbol_visitor_opd() | |
6034 | { } | |
6035 | ||
6036 | void | |
6037 | operator()(Sized_symbol<64>* sym) | |
6038 | { | |
6039 | if (sym->has_symtab_index() | |
6040 | || sym->source() != Symbol::FROM_OBJECT | |
6041 | || !sym->in_real_elf()) | |
6042 | return; | |
6043 | ||
6c77229c AM |
6044 | if (sym->object()->is_dynamic()) |
6045 | return; | |
6046 | ||
ec4dbad3 AM |
6047 | Powerpc_relobj<64, big_endian>* symobj |
6048 | = static_cast<Powerpc_relobj<64, big_endian>*>(sym->object()); | |
6c77229c | 6049 | if (symobj->opd_shndx() == 0) |
ec4dbad3 AM |
6050 | return; |
6051 | ||
6052 | bool is_ordinary; | |
6053 | unsigned int shndx = sym->shndx(&is_ordinary); | |
6054 | if (shndx == symobj->opd_shndx() | |
6055 | && symobj->get_opd_discard(sym->value())) | |
6056 | sym->set_symtab_index(-1U); | |
6057 | } | |
6058 | }; | |
6059 | ||
f3a0ed29 AM |
6060 | template<int size, bool big_endian> |
6061 | void | |
6062 | Target_powerpc<size, big_endian>::define_save_restore_funcs( | |
6063 | Layout* layout, | |
6064 | Symbol_table* symtab) | |
6065 | { | |
6066 | if (size == 64) | |
6067 | { | |
6068 | Output_data_save_res<64, big_endian>* savres | |
6069 | = new Output_data_save_res<64, big_endian>(symtab); | |
6070 | layout->add_output_section_data(".text", elfcpp::SHT_PROGBITS, | |
6071 | elfcpp::SHF_ALLOC | elfcpp::SHF_EXECINSTR, | |
6072 | savres, ORDER_TEXT, false); | |
6073 | } | |
6074 | } | |
6075 | ||
d8f5a274 AM |
6076 | // Sort linker created .got section first (for the header), then input |
6077 | // sections belonging to files using small model code. | |
6078 | ||
6079 | template<bool big_endian> | |
6080 | class Sort_toc_sections | |
6081 | { | |
6082 | public: | |
6083 | bool | |
6084 | operator()(const Output_section::Input_section& is1, | |
6085 | const Output_section::Input_section& is2) const | |
6086 | { | |
6087 | if (!is1.is_input_section() && is2.is_input_section()) | |
6088 | return true; | |
6089 | bool small1 | |
6090 | = (is1.is_input_section() | |
6091 | && (static_cast<const Powerpc_relobj<64, big_endian>*>(is1.relobj()) | |
6092 | ->has_small_toc_reloc())); | |
6093 | bool small2 | |
6094 | = (is2.is_input_section() | |
6095 | && (static_cast<const Powerpc_relobj<64, big_endian>*>(is2.relobj()) | |
6096 | ->has_small_toc_reloc())); | |
6097 | return small1 && !small2; | |
6098 | } | |
6099 | }; | |
6100 | ||
42cacb20 DE |
6101 | // Finalize the sections. |
6102 | ||
6103 | template<int size, bool big_endian> | |
6104 | void | |
d5b40221 DK |
6105 | Target_powerpc<size, big_endian>::do_finalize_sections( |
6106 | Layout* layout, | |
f59f41f3 | 6107 | const Input_objects*, |
ec4dbad3 | 6108 | Symbol_table* symtab) |
42cacb20 | 6109 | { |
c9824451 AM |
6110 | if (parameters->doing_static_link()) |
6111 | { | |
6112 | // At least some versions of glibc elf-init.o have a strong | |
6113 | // reference to __rela_iplt marker syms. A weak ref would be | |
6114 | // better.. | |
6115 | if (this->iplt_ != NULL) | |
6116 | { | |
6117 | Reloc_section* rel = this->iplt_->rel_plt(); | |
6118 | symtab->define_in_output_data("__rela_iplt_start", NULL, | |
6119 | Symbol_table::PREDEFINED, rel, 0, 0, | |
6120 | elfcpp::STT_NOTYPE, elfcpp::STB_GLOBAL, | |
6121 | elfcpp::STV_HIDDEN, 0, false, true); | |
6122 | symtab->define_in_output_data("__rela_iplt_end", NULL, | |
6123 | Symbol_table::PREDEFINED, rel, 0, 0, | |
6124 | elfcpp::STT_NOTYPE, elfcpp::STB_GLOBAL, | |
6125 | elfcpp::STV_HIDDEN, 0, true, true); | |
6126 | } | |
6127 | else | |
6128 | { | |
6129 | symtab->define_as_constant("__rela_iplt_start", NULL, | |
6130 | Symbol_table::PREDEFINED, 0, 0, | |
6131 | elfcpp::STT_NOTYPE, elfcpp::STB_GLOBAL, | |
6132 | elfcpp::STV_HIDDEN, 0, true, false); | |
6133 | symtab->define_as_constant("__rela_iplt_end", NULL, | |
6134 | Symbol_table::PREDEFINED, 0, 0, | |
6135 | elfcpp::STT_NOTYPE, elfcpp::STB_GLOBAL, | |
6136 | elfcpp::STV_HIDDEN, 0, true, false); | |
6137 | } | |
6138 | } | |
6139 | ||
ec4dbad3 AM |
6140 | if (size == 64) |
6141 | { | |
6142 | typedef Global_symbol_visitor_opd<big_endian> Symbol_visitor; | |
6143 | symtab->for_all_symbols<64, Symbol_visitor>(Symbol_visitor()); | |
ec661b9d AM |
6144 | |
6145 | if (!parameters->options().relocatable()) | |
6146 | { | |
6147 | this->define_save_restore_funcs(layout, symtab); | |
6148 | ||
6149 | // Annoyingly, we need to make these sections now whether or | |
6150 | // not we need them. If we delay until do_relax then we | |
6151 | // need to mess with the relaxation machinery checkpointing. | |
6152 | this->got_section(symtab, layout); | |
6153 | this->make_brlt_section(layout); | |
d8f5a274 AM |
6154 | |
6155 | if (parameters->options().toc_sort()) | |
6156 | { | |
6157 | Output_section* os = this->got_->output_section(); | |
6158 | if (os != NULL && os->input_sections().size() > 1) | |
6159 | std::stable_sort(os->input_sections().begin(), | |
6160 | os->input_sections().end(), | |
6161 | Sort_toc_sections<big_endian>()); | |
6162 | } | |
ec661b9d | 6163 | } |
ec4dbad3 AM |
6164 | } |
6165 | ||
42cacb20 | 6166 | // Fill in some more dynamic tags. |
c9269dff | 6167 | Output_data_dynamic* odyn = layout->dynamic_data(); |
c9824451 | 6168 | if (odyn != NULL) |
cf43a2fe | 6169 | { |
c9824451 AM |
6170 | const Reloc_section* rel_plt = (this->plt_ == NULL |
6171 | ? NULL | |
6172 | : this->plt_->rel_plt()); | |
6173 | layout->add_target_dynamic_tags(false, this->plt_, rel_plt, | |
6174 | this->rela_dyn_, true, size == 32); | |
6175 | ||
6176 | if (size == 32) | |
dd93cd0a | 6177 | { |
c9824451 AM |
6178 | if (this->got_ != NULL) |
6179 | { | |
6180 | this->got_->finalize_data_size(); | |
6181 | odyn->add_section_plus_offset(elfcpp::DT_PPC_GOT, | |
6182 | this->got_, this->got_->g_o_t()); | |
6183 | } | |
dd93cd0a | 6184 | } |
c9824451 | 6185 | else |
dd93cd0a | 6186 | { |
c9824451 AM |
6187 | if (this->glink_ != NULL) |
6188 | { | |
6189 | this->glink_->finalize_data_size(); | |
6190 | odyn->add_section_plus_offset(elfcpp::DT_PPC64_GLINK, | |
6191 | this->glink_, | |
ec661b9d | 6192 | (this->glink_->pltresolve_size |
c9824451 AM |
6193 | - 32)); |
6194 | } | |
dd93cd0a | 6195 | } |
c9269dff | 6196 | } |
cf43a2fe | 6197 | |
42cacb20 DE |
6198 | // Emit any relocs we saved in an attempt to avoid generating COPY |
6199 | // relocs. | |
6200 | if (this->copy_relocs_.any_saved_relocs()) | |
6201 | this->copy_relocs_.emit(this->rela_dyn_section(layout)); | |
6202 | } | |
6203 | ||
aba6bc71 AM |
6204 | // Return TRUE iff INSN is one we expect on a _LO variety toc/got |
6205 | // reloc. | |
6206 | ||
6207 | static bool | |
6208 | ok_lo_toc_insn(uint32_t insn) | |
6209 | { | |
6210 | return ((insn & (0x3f << 26)) == 14u << 26 /* addi */ | |
6211 | || (insn & (0x3f << 26)) == 32u << 26 /* lwz */ | |
6212 | || (insn & (0x3f << 26)) == 34u << 26 /* lbz */ | |
6213 | || (insn & (0x3f << 26)) == 36u << 26 /* stw */ | |
6214 | || (insn & (0x3f << 26)) == 38u << 26 /* stb */ | |
6215 | || (insn & (0x3f << 26)) == 40u << 26 /* lhz */ | |
6216 | || (insn & (0x3f << 26)) == 42u << 26 /* lha */ | |
6217 | || (insn & (0x3f << 26)) == 44u << 26 /* sth */ | |
6218 | || (insn & (0x3f << 26)) == 46u << 26 /* lmw */ | |
6219 | || (insn & (0x3f << 26)) == 47u << 26 /* stmw */ | |
6220 | || (insn & (0x3f << 26)) == 48u << 26 /* lfs */ | |
6221 | || (insn & (0x3f << 26)) == 50u << 26 /* lfd */ | |
6222 | || (insn & (0x3f << 26)) == 52u << 26 /* stfs */ | |
6223 | || (insn & (0x3f << 26)) == 54u << 26 /* stfd */ | |
6224 | || ((insn & (0x3f << 26)) == 58u << 26 /* lwa,ld,lmd */ | |
6225 | && (insn & 3) != 1) | |
6226 | || ((insn & (0x3f << 26)) == 62u << 26 /* std, stmd */ | |
6227 | && ((insn & 3) == 0 || (insn & 3) == 3)) | |
6228 | || (insn & (0x3f << 26)) == 12u << 26 /* addic */); | |
6229 | } | |
6230 | ||
3ea0a085 AM |
6231 | // Return the value to use for a branch relocation. |
6232 | ||
6233 | template<int size, bool big_endian> | |
ec5b8187 | 6234 | typename Target_powerpc<size, big_endian>::Address |
3ea0a085 | 6235 | Target_powerpc<size, big_endian>::symval_for_branch( |
6c77229c | 6236 | const Symbol_table* symtab, |
3ea0a085 AM |
6237 | Address value, |
6238 | const Sized_symbol<size>* gsym, | |
6239 | Powerpc_relobj<size, big_endian>* object, | |
6240 | unsigned int *dest_shndx) | |
6241 | { | |
6242 | *dest_shndx = 0; | |
6243 | if (size == 32) | |
6244 | return value; | |
6245 | ||
6246 | // If the symbol is defined in an opd section, ie. is a function | |
6247 | // descriptor, use the function descriptor code entry address | |
6248 | Powerpc_relobj<size, big_endian>* symobj = object; | |
f3a0ed29 AM |
6249 | if (gsym != NULL |
6250 | && gsym->source() != Symbol::FROM_OBJECT) | |
6251 | return value; | |
3ea0a085 AM |
6252 | if (gsym != NULL) |
6253 | symobj = static_cast<Powerpc_relobj<size, big_endian>*>(gsym->object()); | |
6254 | unsigned int shndx = symobj->opd_shndx(); | |
6255 | if (shndx == 0) | |
6256 | return value; | |
6257 | Address opd_addr = symobj->get_output_section_offset(shndx); | |
a2d7bf59 AM |
6258 | if (opd_addr == invalid_address) |
6259 | return value; | |
c6905c28 | 6260 | opd_addr += symobj->output_section_address(shndx); |
3ea0a085 AM |
6261 | if (value >= opd_addr && value < opd_addr + symobj->section_size(shndx)) |
6262 | { | |
6263 | Address sec_off; | |
e81fea4d | 6264 | *dest_shndx = symobj->get_opd_ent(value - opd_addr, &sec_off); |
6c77229c AM |
6265 | if (symtab->is_section_folded(symobj, *dest_shndx)) |
6266 | { | |
6267 | Section_id folded | |
6268 | = symtab->icf()->get_folded_section(symobj, *dest_shndx); | |
6269 | symobj = static_cast<Powerpc_relobj<size, big_endian>*>(folded.first); | |
6270 | *dest_shndx = folded.second; | |
6271 | } | |
3ea0a085 AM |
6272 | Address sec_addr = symobj->get_output_section_offset(*dest_shndx); |
6273 | gold_assert(sec_addr != invalid_address); | |
6274 | sec_addr += symobj->output_section(*dest_shndx)->address(); | |
6275 | value = sec_addr + sec_off; | |
6276 | } | |
6277 | return value; | |
6278 | } | |
6279 | ||
42cacb20 DE |
6280 | // Perform a relocation. |
6281 | ||
6282 | template<int size, bool big_endian> | |
6283 | inline bool | |
6284 | Target_powerpc<size, big_endian>::Relocate::relocate( | |
d83ce4e3 AM |
6285 | const Relocate_info<size, big_endian>* relinfo, |
6286 | Target_powerpc* target, | |
6287 | Output_section* os, | |
6288 | size_t relnum, | |
6289 | const elfcpp::Rela<size, big_endian>& rela, | |
6290 | unsigned int r_type, | |
6291 | const Sized_symbol<size>* gsym, | |
6292 | const Symbol_value<size>* psymval, | |
6293 | unsigned char* view, | |
c9269dff AM |
6294 | Address address, |
6295 | section_size_type view_size) | |
42cacb20 | 6296 | { |
0e804863 ILT |
6297 | if (view == NULL) |
6298 | return true; | |
6299 | ||
e3deeb9c | 6300 | switch (this->maybe_skip_tls_get_addr_call(r_type, gsym)) |
dd93cd0a | 6301 | { |
e3deeb9c AM |
6302 | case Track_tls::NOT_EXPECTED: |
6303 | gold_error_at_location(relinfo, relnum, rela.get_r_offset(), | |
6304 | _("__tls_get_addr call lacks marker reloc")); | |
6305 | break; | |
6306 | case Track_tls::EXPECTED: | |
6307 | // We have already complained. | |
6308 | break; | |
6309 | case Track_tls::SKIP: | |
6310 | return true; | |
6311 | case Track_tls::NORMAL: | |
6312 | break; | |
dd93cd0a | 6313 | } |
dd93cd0a | 6314 | |
42cacb20 | 6315 | typedef Powerpc_relocate_functions<size, big_endian> Reloc; |
dd93cd0a | 6316 | typedef typename elfcpp::Swap<32, big_endian>::Valtype Insn; |
3ea0a085 AM |
6317 | Powerpc_relobj<size, big_endian>* const object |
6318 | = static_cast<Powerpc_relobj<size, big_endian>*>(relinfo->object); | |
dd93cd0a AM |
6319 | Address value = 0; |
6320 | bool has_plt_value = false; | |
e5d5f5ed | 6321 | unsigned int r_sym = elfcpp::elf_r_sym<size>(rela.get_r_info()); |
b3ccdeb5 AM |
6322 | if ((gsym != NULL |
6323 | ? use_plt_offset<size>(gsym, Scan::get_reference_flags(r_type)) | |
6324 | : object->local_has_plt_offset(r_sym)) | |
6325 | && (!psymval->is_ifunc_symbol() | |
6326 | || Scan::reloc_needs_plt_for_ifunc(object, r_type, false))) | |
dd93cd0a | 6327 | { |
ec661b9d AM |
6328 | Stub_table<size, big_endian>* stub_table |
6329 | = object->stub_table(relinfo->data_shndx); | |
6330 | if (stub_table == NULL) | |
6331 | { | |
6332 | // This is a ref from a data section to an ifunc symbol. | |
6333 | if (target->stub_tables().size() != 0) | |
6334 | stub_table = target->stub_tables()[0]; | |
6335 | } | |
6336 | gold_assert(stub_table != NULL); | |
6337 | Address off; | |
c9824451 | 6338 | if (gsym != NULL) |
ec661b9d AM |
6339 | off = stub_table->find_plt_call_entry(object, gsym, r_type, |
6340 | rela.get_r_addend()); | |
c9824451 | 6341 | else |
ec661b9d AM |
6342 | off = stub_table->find_plt_call_entry(object, r_sym, r_type, |
6343 | rela.get_r_addend()); | |
6344 | gold_assert(off != invalid_address); | |
6345 | value = stub_table->stub_address() + off; | |
dd93cd0a AM |
6346 | has_plt_value = true; |
6347 | } | |
cf43a2fe AM |
6348 | |
6349 | if (r_type == elfcpp::R_POWERPC_GOT16 | |
6350 | || r_type == elfcpp::R_POWERPC_GOT16_LO | |
6351 | || r_type == elfcpp::R_POWERPC_GOT16_HI | |
6352 | || r_type == elfcpp::R_POWERPC_GOT16_HA | |
6353 | || r_type == elfcpp::R_PPC64_GOT16_DS | |
6354 | || r_type == elfcpp::R_PPC64_GOT16_LO_DS) | |
42cacb20 | 6355 | { |
cf43a2fe AM |
6356 | if (gsym != NULL) |
6357 | { | |
6358 | gold_assert(gsym->has_got_offset(GOT_TYPE_STANDARD)); | |
6359 | value = gsym->got_offset(GOT_TYPE_STANDARD); | |
6360 | } | |
6361 | else | |
6362 | { | |
6363 | unsigned int r_sym = elfcpp::elf_r_sym<size>(rela.get_r_info()); | |
6364 | gold_assert(object->local_has_got_offset(r_sym, GOT_TYPE_STANDARD)); | |
6365 | value = object->local_got_offset(r_sym, GOT_TYPE_STANDARD); | |
6366 | } | |
dd93cd0a | 6367 | value -= target->got_section()->got_base_offset(object); |
cf43a2fe AM |
6368 | } |
6369 | else if (r_type == elfcpp::R_PPC64_TOC) | |
6370 | { | |
c9269dff | 6371 | value = (target->got_section()->output_section()->address() |
dd93cd0a | 6372 | + object->toc_base_offset()); |
cf43a2fe AM |
6373 | } |
6374 | else if (gsym != NULL | |
6375 | && (r_type == elfcpp::R_POWERPC_REL24 | |
6376 | || r_type == elfcpp::R_PPC_PLTREL24) | |
dd93cd0a | 6377 | && has_plt_value) |
cf43a2fe | 6378 | { |
c9269dff AM |
6379 | if (size == 64) |
6380 | { | |
6381 | typedef typename elfcpp::Swap<32, big_endian>::Valtype Valtype; | |
6382 | Valtype* wv = reinterpret_cast<Valtype*>(view); | |
6383 | bool can_plt_call = false; | |
6384 | if (rela.get_r_offset() + 8 <= view_size) | |
6385 | { | |
3ea0a085 | 6386 | Valtype insn = elfcpp::Swap<32, big_endian>::readval(wv); |
c9269dff | 6387 | Valtype insn2 = elfcpp::Swap<32, big_endian>::readval(wv + 1); |
3ea0a085 AM |
6388 | if ((insn & 1) != 0 |
6389 | && (insn2 == nop | |
6390 | || insn2 == cror_15_15_15 || insn2 == cror_31_31_31)) | |
c9269dff AM |
6391 | { |
6392 | elfcpp::Swap<32, big_endian>::writeval(wv + 1, ld_2_1 + 40); | |
6393 | can_plt_call = true; | |
6394 | } | |
6395 | } | |
6396 | if (!can_plt_call) | |
3ea0a085 AM |
6397 | { |
6398 | // If we don't have a branch and link followed by a nop, | |
6399 | // we can't go via the plt because there is no place to | |
6400 | // put a toc restoring instruction. | |
6401 | // Unless we know we won't be returning. | |
6402 | if (strcmp(gsym->name(), "__libc_start_main") == 0) | |
6403 | can_plt_call = true; | |
6404 | } | |
6405 | if (!can_plt_call) | |
6406 | { | |
ba8ca3e7 AM |
6407 | // g++ as of 20130507 emits self-calls without a |
6408 | // following nop. This is arguably wrong since we have | |
6409 | // conflicting information. On the one hand a global | |
6410 | // symbol and on the other a local call sequence, but | |
6411 | // don't error for this special case. | |
6412 | // It isn't possible to cheaply verify we have exactly | |
6413 | // such a call. Allow all calls to the same section. | |
3ea0a085 | 6414 | bool ok = false; |
c9824451 | 6415 | Address code = value; |
3ea0a085 AM |
6416 | if (gsym->source() == Symbol::FROM_OBJECT |
6417 | && gsym->object() == object) | |
6418 | { | |
6419 | Address addend = rela.get_r_addend(); | |
6420 | unsigned int dest_shndx; | |
c9824451 | 6421 | Address opdent = psymval->value(object, addend); |
6c77229c AM |
6422 | code = target->symval_for_branch(relinfo->symtab, opdent, |
6423 | gsym, object, &dest_shndx); | |
3ea0a085 AM |
6424 | bool is_ordinary; |
6425 | if (dest_shndx == 0) | |
6426 | dest_shndx = gsym->shndx(&is_ordinary); | |
6427 | ok = dest_shndx == relinfo->data_shndx; | |
6428 | } | |
6429 | if (!ok) | |
c9824451 AM |
6430 | { |
6431 | gold_error_at_location(relinfo, relnum, rela.get_r_offset(), | |
6432 | _("call lacks nop, can't restore toc; " | |
6433 | "recompile with -fPIC")); | |
6434 | value = code; | |
6435 | } | |
3ea0a085 | 6436 | } |
c9269dff | 6437 | } |
cf43a2fe | 6438 | } |
dd93cd0a AM |
6439 | else if (r_type == elfcpp::R_POWERPC_GOT_TLSGD16 |
6440 | || r_type == elfcpp::R_POWERPC_GOT_TLSGD16_LO | |
6441 | || r_type == elfcpp::R_POWERPC_GOT_TLSGD16_HI | |
6442 | || r_type == elfcpp::R_POWERPC_GOT_TLSGD16_HA) | |
6443 | { | |
6444 | // First instruction of a global dynamic sequence, arg setup insn. | |
6445 | const bool final = gsym == NULL || gsym->final_value_is_known(); | |
6446 | const tls::Tls_optimization tls_type = target->optimize_tls_gd(final); | |
6447 | enum Got_type got_type = GOT_TYPE_STANDARD; | |
6448 | if (tls_type == tls::TLSOPT_NONE) | |
6449 | got_type = GOT_TYPE_TLSGD; | |
6450 | else if (tls_type == tls::TLSOPT_TO_IE) | |
6451 | got_type = GOT_TYPE_TPREL; | |
6452 | if (got_type != GOT_TYPE_STANDARD) | |
6453 | { | |
6454 | if (gsym != NULL) | |
6455 | { | |
6456 | gold_assert(gsym->has_got_offset(got_type)); | |
6457 | value = gsym->got_offset(got_type); | |
6458 | } | |
6459 | else | |
6460 | { | |
6461 | unsigned int r_sym = elfcpp::elf_r_sym<size>(rela.get_r_info()); | |
6462 | gold_assert(object->local_has_got_offset(r_sym, got_type)); | |
6463 | value = object->local_got_offset(r_sym, got_type); | |
6464 | } | |
6465 | value -= target->got_section()->got_base_offset(object); | |
6466 | } | |
6467 | if (tls_type == tls::TLSOPT_TO_IE) | |
6468 | { | |
6469 | if (r_type == elfcpp::R_POWERPC_GOT_TLSGD16 | |
6470 | || r_type == elfcpp::R_POWERPC_GOT_TLSGD16_LO) | |
6471 | { | |
6472 | Insn* iview = reinterpret_cast<Insn*>(view - 2 * big_endian); | |
6473 | Insn insn = elfcpp::Swap<32, big_endian>::readval(iview); | |
6474 | insn &= (1 << 26) - (1 << 16); // extract rt,ra from addi | |
6475 | if (size == 32) | |
6476 | insn |= 32 << 26; // lwz | |
6477 | else | |
6478 | insn |= 58 << 26; // ld | |
6479 | elfcpp::Swap<32, big_endian>::writeval(iview, insn); | |
6480 | } | |
6481 | r_type += (elfcpp::R_POWERPC_GOT_TPREL16 | |
6482 | - elfcpp::R_POWERPC_GOT_TLSGD16); | |
6483 | } | |
6484 | else if (tls_type == tls::TLSOPT_TO_LE) | |
6485 | { | |
6486 | if (r_type == elfcpp::R_POWERPC_GOT_TLSGD16 | |
6487 | || r_type == elfcpp::R_POWERPC_GOT_TLSGD16_LO) | |
6488 | { | |
6489 | Insn* iview = reinterpret_cast<Insn*>(view - 2 * big_endian); | |
6490 | Insn insn = addis_3_13; | |
6491 | if (size == 32) | |
6492 | insn = addis_3_2; | |
6493 | elfcpp::Swap<32, big_endian>::writeval(iview, insn); | |
6494 | r_type = elfcpp::R_POWERPC_TPREL16_HA; | |
6495 | value = psymval->value(object, rela.get_r_addend()); | |
6496 | } | |
6497 | else | |
6498 | { | |
6499 | Insn* iview = reinterpret_cast<Insn*>(view - 2 * big_endian); | |
6500 | Insn insn = nop; | |
6501 | elfcpp::Swap<32, big_endian>::writeval(iview, insn); | |
6502 | r_type = elfcpp::R_POWERPC_NONE; | |
6503 | } | |
6504 | } | |
6505 | } | |
6506 | else if (r_type == elfcpp::R_POWERPC_GOT_TLSLD16 | |
6507 | || r_type == elfcpp::R_POWERPC_GOT_TLSLD16_LO | |
6508 | || r_type == elfcpp::R_POWERPC_GOT_TLSLD16_HI | |
6509 | || r_type == elfcpp::R_POWERPC_GOT_TLSLD16_HA) | |
6510 | { | |
6511 | // First instruction of a local dynamic sequence, arg setup insn. | |
6512 | const tls::Tls_optimization tls_type = target->optimize_tls_ld(); | |
6513 | if (tls_type == tls::TLSOPT_NONE) | |
6514 | { | |
6515 | value = target->tlsld_got_offset(); | |
6516 | value -= target->got_section()->got_base_offset(object); | |
6517 | } | |
6518 | else | |
6519 | { | |
6520 | gold_assert(tls_type == tls::TLSOPT_TO_LE); | |
6521 | if (r_type == elfcpp::R_POWERPC_GOT_TLSLD16 | |
6522 | || r_type == elfcpp::R_POWERPC_GOT_TLSLD16_LO) | |
6523 | { | |
6524 | Insn* iview = reinterpret_cast<Insn*>(view - 2 * big_endian); | |
6525 | Insn insn = addis_3_13; | |
6526 | if (size == 32) | |
6527 | insn = addis_3_2; | |
6528 | elfcpp::Swap<32, big_endian>::writeval(iview, insn); | |
6529 | r_type = elfcpp::R_POWERPC_TPREL16_HA; | |
7404fe1b | 6530 | value = dtp_offset; |
dd93cd0a AM |
6531 | } |
6532 | else | |
6533 | { | |
6534 | Insn* iview = reinterpret_cast<Insn*>(view - 2 * big_endian); | |
6535 | Insn insn = nop; | |
6536 | elfcpp::Swap<32, big_endian>::writeval(iview, insn); | |
6537 | r_type = elfcpp::R_POWERPC_NONE; | |
6538 | } | |
6539 | } | |
6540 | } | |
6541 | else if (r_type == elfcpp::R_POWERPC_GOT_DTPREL16 | |
6542 | || r_type == elfcpp::R_POWERPC_GOT_DTPREL16_LO | |
6543 | || r_type == elfcpp::R_POWERPC_GOT_DTPREL16_HI | |
6544 | || r_type == elfcpp::R_POWERPC_GOT_DTPREL16_HA) | |
6545 | { | |
6546 | // Accesses relative to a local dynamic sequence address, | |
6547 | // no optimisation here. | |
6548 | if (gsym != NULL) | |
6549 | { | |
6550 | gold_assert(gsym->has_got_offset(GOT_TYPE_DTPREL)); | |
6551 | value = gsym->got_offset(GOT_TYPE_DTPREL); | |
6552 | } | |
6553 | else | |
6554 | { | |
6555 | unsigned int r_sym = elfcpp::elf_r_sym<size>(rela.get_r_info()); | |
6556 | gold_assert(object->local_has_got_offset(r_sym, GOT_TYPE_DTPREL)); | |
6557 | value = object->local_got_offset(r_sym, GOT_TYPE_DTPREL); | |
6558 | } | |
6559 | value -= target->got_section()->got_base_offset(object); | |
6560 | } | |
6561 | else if (r_type == elfcpp::R_POWERPC_GOT_TPREL16 | |
6562 | || r_type == elfcpp::R_POWERPC_GOT_TPREL16_LO | |
6563 | || r_type == elfcpp::R_POWERPC_GOT_TPREL16_HI | |
6564 | || r_type == elfcpp::R_POWERPC_GOT_TPREL16_HA) | |
6565 | { | |
6566 | // First instruction of initial exec sequence. | |
6567 | const bool final = gsym == NULL || gsym->final_value_is_known(); | |
6568 | const tls::Tls_optimization tls_type = target->optimize_tls_ie(final); | |
6569 | if (tls_type == tls::TLSOPT_NONE) | |
6570 | { | |
6571 | if (gsym != NULL) | |
6572 | { | |
6573 | gold_assert(gsym->has_got_offset(GOT_TYPE_TPREL)); | |
6574 | value = gsym->got_offset(GOT_TYPE_TPREL); | |
6575 | } | |
6576 | else | |
6577 | { | |
6578 | unsigned int r_sym = elfcpp::elf_r_sym<size>(rela.get_r_info()); | |
6579 | gold_assert(object->local_has_got_offset(r_sym, GOT_TYPE_TPREL)); | |
6580 | value = object->local_got_offset(r_sym, GOT_TYPE_TPREL); | |
6581 | } | |
6582 | value -= target->got_section()->got_base_offset(object); | |
6583 | } | |
6584 | else | |
6585 | { | |
6586 | gold_assert(tls_type == tls::TLSOPT_TO_LE); | |
6587 | if (r_type == elfcpp::R_POWERPC_GOT_TPREL16 | |
6588 | || r_type == elfcpp::R_POWERPC_GOT_TPREL16_LO) | |
6589 | { | |
6590 | Insn* iview = reinterpret_cast<Insn*>(view - 2 * big_endian); | |
6591 | Insn insn = elfcpp::Swap<32, big_endian>::readval(iview); | |
6592 | insn &= (1 << 26) - (1 << 21); // extract rt from ld | |
6593 | if (size == 32) | |
6594 | insn |= addis_0_2; | |
6595 | else | |
6596 | insn |= addis_0_13; | |
6597 | elfcpp::Swap<32, big_endian>::writeval(iview, insn); | |
6598 | r_type = elfcpp::R_POWERPC_TPREL16_HA; | |
6599 | value = psymval->value(object, rela.get_r_addend()); | |
6600 | } | |
6601 | else | |
6602 | { | |
6603 | Insn* iview = reinterpret_cast<Insn*>(view - 2 * big_endian); | |
6604 | Insn insn = nop; | |
6605 | elfcpp::Swap<32, big_endian>::writeval(iview, insn); | |
6606 | r_type = elfcpp::R_POWERPC_NONE; | |
6607 | } | |
6608 | } | |
6609 | } | |
6610 | else if ((size == 64 && r_type == elfcpp::R_PPC64_TLSGD) | |
6611 | || (size == 32 && r_type == elfcpp::R_PPC_TLSGD)) | |
6612 | { | |
6613 | // Second instruction of a global dynamic sequence, | |
6614 | // the __tls_get_addr call | |
e3deeb9c | 6615 | this->expect_tls_get_addr_call(relinfo, relnum, rela.get_r_offset()); |
dd93cd0a AM |
6616 | const bool final = gsym == NULL || gsym->final_value_is_known(); |
6617 | const tls::Tls_optimization tls_type = target->optimize_tls_gd(final); | |
6618 | if (tls_type != tls::TLSOPT_NONE) | |
6619 | { | |
6620 | if (tls_type == tls::TLSOPT_TO_IE) | |
6621 | { | |
6622 | Insn* iview = reinterpret_cast<Insn*>(view); | |
6623 | Insn insn = add_3_3_13; | |
6624 | if (size == 32) | |
6625 | insn = add_3_3_2; | |
6626 | elfcpp::Swap<32, big_endian>::writeval(iview, insn); | |
6627 | r_type = elfcpp::R_POWERPC_NONE; | |
6628 | } | |
6629 | else | |
6630 | { | |
6631 | Insn* iview = reinterpret_cast<Insn*>(view); | |
6632 | Insn insn = addi_3_3; | |
6633 | elfcpp::Swap<32, big_endian>::writeval(iview, insn); | |
6634 | r_type = elfcpp::R_POWERPC_TPREL16_LO; | |
6635 | view += 2 * big_endian; | |
6636 | value = psymval->value(object, rela.get_r_addend()); | |
6637 | } | |
e3deeb9c | 6638 | this->skip_next_tls_get_addr_call(); |
dd93cd0a AM |
6639 | } |
6640 | } | |
6641 | else if ((size == 64 && r_type == elfcpp::R_PPC64_TLSLD) | |
6642 | || (size == 32 && r_type == elfcpp::R_PPC_TLSLD)) | |
6643 | { | |
6644 | // Second instruction of a local dynamic sequence, | |
6645 | // the __tls_get_addr call | |
e3deeb9c | 6646 | this->expect_tls_get_addr_call(relinfo, relnum, rela.get_r_offset()); |
dd93cd0a AM |
6647 | const tls::Tls_optimization tls_type = target->optimize_tls_ld(); |
6648 | if (tls_type == tls::TLSOPT_TO_LE) | |
6649 | { | |
6650 | Insn* iview = reinterpret_cast<Insn*>(view); | |
6651 | Insn insn = addi_3_3; | |
6652 | elfcpp::Swap<32, big_endian>::writeval(iview, insn); | |
e3deeb9c | 6653 | this->skip_next_tls_get_addr_call(); |
dd93cd0a AM |
6654 | r_type = elfcpp::R_POWERPC_TPREL16_LO; |
6655 | view += 2 * big_endian; | |
7404fe1b | 6656 | value = dtp_offset; |
dd93cd0a AM |
6657 | } |
6658 | } | |
6659 | else if (r_type == elfcpp::R_POWERPC_TLS) | |
6660 | { | |
6661 | // Second instruction of an initial exec sequence | |
6662 | const bool final = gsym == NULL || gsym->final_value_is_known(); | |
6663 | const tls::Tls_optimization tls_type = target->optimize_tls_ie(final); | |
6664 | if (tls_type == tls::TLSOPT_TO_LE) | |
6665 | { | |
6666 | Insn* iview = reinterpret_cast<Insn*>(view); | |
6667 | Insn insn = elfcpp::Swap<32, big_endian>::readval(iview); | |
6668 | unsigned int reg = size == 32 ? 2 : 13; | |
6669 | insn = at_tls_transform(insn, reg); | |
6670 | gold_assert(insn != 0); | |
6671 | elfcpp::Swap<32, big_endian>::writeval(iview, insn); | |
6672 | r_type = elfcpp::R_POWERPC_TPREL16_LO; | |
6673 | view += 2 * big_endian; | |
6674 | value = psymval->value(object, rela.get_r_addend()); | |
6675 | } | |
6676 | } | |
c9824451 | 6677 | else if (!has_plt_value) |
cf43a2fe | 6678 | { |
dd93cd0a | 6679 | Address addend = 0; |
3ea0a085 | 6680 | unsigned int dest_shndx; |
cf43a2fe AM |
6681 | if (r_type != elfcpp::R_PPC_PLTREL24) |
6682 | addend = rela.get_r_addend(); | |
c9824451 | 6683 | value = psymval->value(object, addend); |
dd93cd0a | 6684 | if (size == 64 && is_branch_reloc(r_type)) |
6c77229c AM |
6685 | value = target->symval_for_branch(relinfo->symtab, value, |
6686 | gsym, object, &dest_shndx); | |
ec661b9d AM |
6687 | unsigned int max_branch_offset = 0; |
6688 | if (r_type == elfcpp::R_POWERPC_REL24 | |
6689 | || r_type == elfcpp::R_PPC_PLTREL24 | |
6690 | || r_type == elfcpp::R_PPC_LOCAL24PC) | |
6691 | max_branch_offset = 1 << 25; | |
6692 | else if (r_type == elfcpp::R_POWERPC_REL14 | |
6693 | || r_type == elfcpp::R_POWERPC_REL14_BRTAKEN | |
6694 | || r_type == elfcpp::R_POWERPC_REL14_BRNTAKEN) | |
6695 | max_branch_offset = 1 << 15; | |
6696 | if (max_branch_offset != 0 | |
6697 | && value - address + max_branch_offset >= 2 * max_branch_offset) | |
6698 | { | |
6699 | Stub_table<size, big_endian>* stub_table | |
6700 | = object->stub_table(relinfo->data_shndx); | |
0cfdc767 AM |
6701 | if (stub_table != NULL) |
6702 | { | |
6703 | Address off = stub_table->find_long_branch_entry(object, value); | |
6704 | if (off != invalid_address) | |
6705 | value = (stub_table->stub_address() + stub_table->plt_size() | |
6706 | + off); | |
6707 | } | |
ec661b9d | 6708 | } |
42cacb20 DE |
6709 | } |
6710 | ||
42cacb20 DE |
6711 | switch (r_type) |
6712 | { | |
dd93cd0a AM |
6713 | case elfcpp::R_PPC64_REL64: |
6714 | case elfcpp::R_POWERPC_REL32: | |
6715 | case elfcpp::R_POWERPC_REL24: | |
6716 | case elfcpp::R_PPC_PLTREL24: | |
6717 | case elfcpp::R_PPC_LOCAL24PC: | |
6718 | case elfcpp::R_POWERPC_REL16: | |
6719 | case elfcpp::R_POWERPC_REL16_LO: | |
6720 | case elfcpp::R_POWERPC_REL16_HI: | |
6721 | case elfcpp::R_POWERPC_REL16_HA: | |
6722 | case elfcpp::R_POWERPC_REL14: | |
6723 | case elfcpp::R_POWERPC_REL14_BRTAKEN: | |
6724 | case elfcpp::R_POWERPC_REL14_BRNTAKEN: | |
6725 | value -= address; | |
6726 | break; | |
6727 | ||
42cacb20 DE |
6728 | case elfcpp::R_PPC64_TOC16: |
6729 | case elfcpp::R_PPC64_TOC16_LO: | |
6730 | case elfcpp::R_PPC64_TOC16_HI: | |
6731 | case elfcpp::R_PPC64_TOC16_HA: | |
6732 | case elfcpp::R_PPC64_TOC16_DS: | |
6733 | case elfcpp::R_PPC64_TOC16_LO_DS: | |
cf43a2fe | 6734 | // Subtract the TOC base address. |
c9269dff | 6735 | value -= (target->got_section()->output_section()->address() |
dd93cd0a | 6736 | + object->toc_base_offset()); |
42cacb20 DE |
6737 | break; |
6738 | ||
cf43a2fe AM |
6739 | case elfcpp::R_POWERPC_SECTOFF: |
6740 | case elfcpp::R_POWERPC_SECTOFF_LO: | |
6741 | case elfcpp::R_POWERPC_SECTOFF_HI: | |
6742 | case elfcpp::R_POWERPC_SECTOFF_HA: | |
6743 | case elfcpp::R_PPC64_SECTOFF_DS: | |
6744 | case elfcpp::R_PPC64_SECTOFF_LO_DS: | |
6745 | if (os != NULL) | |
6746 | value -= os->address(); | |
42cacb20 DE |
6747 | break; |
6748 | ||
dd93cd0a AM |
6749 | case elfcpp::R_PPC64_TPREL16_DS: |
6750 | case elfcpp::R_PPC64_TPREL16_LO_DS: | |
6751 | if (size != 64) | |
6752 | // R_PPC_TLSGD and R_PPC_TLSLD | |
6753 | break; | |
6754 | case elfcpp::R_POWERPC_TPREL16: | |
6755 | case elfcpp::R_POWERPC_TPREL16_LO: | |
6756 | case elfcpp::R_POWERPC_TPREL16_HI: | |
6757 | case elfcpp::R_POWERPC_TPREL16_HA: | |
6758 | case elfcpp::R_POWERPC_TPREL: | |
6759 | case elfcpp::R_PPC64_TPREL16_HIGHER: | |
6760 | case elfcpp::R_PPC64_TPREL16_HIGHERA: | |
6761 | case elfcpp::R_PPC64_TPREL16_HIGHEST: | |
6762 | case elfcpp::R_PPC64_TPREL16_HIGHESTA: | |
6763 | // tls symbol values are relative to tls_segment()->vaddr() | |
6764 | value -= tp_offset; | |
6765 | break; | |
6766 | ||
6767 | case elfcpp::R_PPC64_DTPREL16_DS: | |
6768 | case elfcpp::R_PPC64_DTPREL16_LO_DS: | |
6769 | case elfcpp::R_PPC64_DTPREL16_HIGHER: | |
6770 | case elfcpp::R_PPC64_DTPREL16_HIGHERA: | |
6771 | case elfcpp::R_PPC64_DTPREL16_HIGHEST: | |
6772 | case elfcpp::R_PPC64_DTPREL16_HIGHESTA: | |
6773 | if (size != 64) | |
6774 | // R_PPC_EMB_NADDR32, R_PPC_EMB_NADDR16, R_PPC_EMB_NADDR16_LO | |
6775 | // R_PPC_EMB_NADDR16_HI, R_PPC_EMB_NADDR16_HA, R_PPC_EMB_SDAI16 | |
6776 | break; | |
6777 | case elfcpp::R_POWERPC_DTPREL16: | |
6778 | case elfcpp::R_POWERPC_DTPREL16_LO: | |
6779 | case elfcpp::R_POWERPC_DTPREL16_HI: | |
6780 | case elfcpp::R_POWERPC_DTPREL16_HA: | |
6781 | case elfcpp::R_POWERPC_DTPREL: | |
6782 | // tls symbol values are relative to tls_segment()->vaddr() | |
6783 | value -= dtp_offset; | |
6784 | break; | |
6785 | ||
42cacb20 DE |
6786 | default: |
6787 | break; | |
6788 | } | |
6789 | ||
dd93cd0a | 6790 | Insn branch_bit = 0; |
42cacb20 DE |
6791 | switch (r_type) |
6792 | { | |
dd93cd0a AM |
6793 | case elfcpp::R_POWERPC_ADDR14_BRTAKEN: |
6794 | case elfcpp::R_POWERPC_REL14_BRTAKEN: | |
6795 | branch_bit = 1 << 21; | |
6796 | case elfcpp::R_POWERPC_ADDR14_BRNTAKEN: | |
6797 | case elfcpp::R_POWERPC_REL14_BRNTAKEN: | |
6798 | { | |
6799 | Insn* iview = reinterpret_cast<Insn*>(view); | |
6800 | Insn insn = elfcpp::Swap<32, big_endian>::readval(iview); | |
6801 | insn &= ~(1 << 21); | |
6802 | insn |= branch_bit; | |
6803 | if (this->is_isa_v2) | |
6804 | { | |
6805 | // Set 'a' bit. This is 0b00010 in BO field for branch | |
6806 | // on CR(BI) insns (BO == 001at or 011at), and 0b01000 | |
6807 | // for branch on CTR insns (BO == 1a00t or 1a01t). | |
6808 | if ((insn & (0x14 << 21)) == (0x04 << 21)) | |
6809 | insn |= 0x02 << 21; | |
6810 | else if ((insn & (0x14 << 21)) == (0x10 << 21)) | |
6811 | insn |= 0x08 << 21; | |
6812 | else | |
6813 | break; | |
6814 | } | |
6815 | else | |
6816 | { | |
6817 | // Invert 'y' bit if not the default. | |
6818 | if (static_cast<Signed_address>(value) < 0) | |
6819 | insn ^= 1 << 21; | |
6820 | } | |
6821 | elfcpp::Swap<32, big_endian>::writeval(iview, insn); | |
6822 | } | |
6823 | break; | |
6824 | ||
6825 | default: | |
6826 | break; | |
6827 | } | |
6828 | ||
aba6bc71 AM |
6829 | if (size == 64) |
6830 | { | |
6831 | // Multi-instruction sequences that access the TOC can be | |
6832 | // optimized, eg. addis ra,r2,0; addi rb,ra,x; | |
6833 | // to nop; addi rb,r2,x; | |
6834 | switch (r_type) | |
6835 | { | |
6836 | default: | |
6837 | break; | |
6838 | ||
6839 | case elfcpp::R_POWERPC_GOT_TLSLD16_HA: | |
6840 | case elfcpp::R_POWERPC_GOT_TLSGD16_HA: | |
6841 | case elfcpp::R_POWERPC_GOT_TPREL16_HA: | |
6842 | case elfcpp::R_POWERPC_GOT_DTPREL16_HA: | |
6843 | case elfcpp::R_POWERPC_GOT16_HA: | |
6844 | case elfcpp::R_PPC64_TOC16_HA: | |
d8f5a274 | 6845 | if (parameters->options().toc_optimize()) |
aba6bc71 AM |
6846 | { |
6847 | Insn* iview = reinterpret_cast<Insn*>(view - 2 * big_endian); | |
6848 | Insn insn = elfcpp::Swap<32, big_endian>::readval(iview); | |
6849 | if ((insn & ((0x3f << 26) | 0x1f << 16)) | |
6850 | != ((15u << 26) | (2 << 16)) /* addis rt,2,imm */) | |
6851 | gold_error_at_location(relinfo, relnum, rela.get_r_offset(), | |
6852 | _("toc optimization is not supported " | |
6853 | "for %#08x instruction"), insn); | |
6854 | else if (value + 0x8000 < 0x10000) | |
6855 | { | |
6856 | elfcpp::Swap<32, big_endian>::writeval(iview, nop); | |
6857 | return true; | |
6858 | } | |
6859 | } | |
6860 | break; | |
6861 | ||
6862 | case elfcpp::R_POWERPC_GOT_TLSLD16_LO: | |
6863 | case elfcpp::R_POWERPC_GOT_TLSGD16_LO: | |
6864 | case elfcpp::R_POWERPC_GOT_TPREL16_LO: | |
6865 | case elfcpp::R_POWERPC_GOT_DTPREL16_LO: | |
6866 | case elfcpp::R_POWERPC_GOT16_LO: | |
6867 | case elfcpp::R_PPC64_GOT16_LO_DS: | |
6868 | case elfcpp::R_PPC64_TOC16_LO: | |
6869 | case elfcpp::R_PPC64_TOC16_LO_DS: | |
d8f5a274 | 6870 | if (parameters->options().toc_optimize()) |
aba6bc71 AM |
6871 | { |
6872 | Insn* iview = reinterpret_cast<Insn*>(view - 2 * big_endian); | |
6873 | Insn insn = elfcpp::Swap<32, big_endian>::readval(iview); | |
6874 | if (!ok_lo_toc_insn(insn)) | |
6875 | gold_error_at_location(relinfo, relnum, rela.get_r_offset(), | |
6876 | _("toc optimization is not supported " | |
6877 | "for %#08x instruction"), insn); | |
6878 | else if (value + 0x8000 < 0x10000) | |
6879 | { | |
6880 | if ((insn & (0x3f << 26)) == 12u << 26 /* addic */) | |
6881 | { | |
6882 | // Transform addic to addi when we change reg. | |
6883 | insn &= ~((0x3f << 26) | (0x1f << 16)); | |
6884 | insn |= (14u << 26) | (2 << 16); | |
6885 | } | |
6886 | else | |
6887 | { | |
6888 | insn &= ~(0x1f << 16); | |
6889 | insn |= 2 << 16; | |
6890 | } | |
6891 | elfcpp::Swap<32, big_endian>::writeval(iview, insn); | |
6892 | } | |
6893 | } | |
6894 | break; | |
6895 | } | |
6896 | } | |
6897 | ||
f4baf0d4 | 6898 | typename Reloc::Overflow_check overflow = Reloc::CHECK_NONE; |
dd93cd0a AM |
6899 | switch (r_type) |
6900 | { | |
6901 | case elfcpp::R_POWERPC_ADDR32: | |
6902 | case elfcpp::R_POWERPC_UADDR32: | |
6903 | if (size == 64) | |
f4baf0d4 | 6904 | overflow = Reloc::CHECK_BITFIELD; |
42cacb20 DE |
6905 | break; |
6906 | ||
6907 | case elfcpp::R_POWERPC_REL32: | |
dd93cd0a | 6908 | if (size == 64) |
f4baf0d4 | 6909 | overflow = Reloc::CHECK_SIGNED; |
dd93cd0a AM |
6910 | break; |
6911 | ||
6912 | case elfcpp::R_POWERPC_ADDR24: | |
6913 | case elfcpp::R_POWERPC_ADDR16: | |
6914 | case elfcpp::R_POWERPC_UADDR16: | |
6915 | case elfcpp::R_PPC64_ADDR16_DS: | |
6916 | case elfcpp::R_POWERPC_ADDR14: | |
6917 | case elfcpp::R_POWERPC_ADDR14_BRTAKEN: | |
6918 | case elfcpp::R_POWERPC_ADDR14_BRNTAKEN: | |
f4baf0d4 | 6919 | overflow = Reloc::CHECK_BITFIELD; |
42cacb20 DE |
6920 | break; |
6921 | ||
6922 | case elfcpp::R_POWERPC_REL24: | |
42cacb20 | 6923 | case elfcpp::R_PPC_PLTREL24: |
cf43a2fe | 6924 | case elfcpp::R_PPC_LOCAL24PC: |
dd93cd0a AM |
6925 | case elfcpp::R_POWERPC_REL16: |
6926 | case elfcpp::R_PPC64_TOC16: | |
6927 | case elfcpp::R_POWERPC_GOT16: | |
6928 | case elfcpp::R_POWERPC_SECTOFF: | |
6929 | case elfcpp::R_POWERPC_TPREL16: | |
6930 | case elfcpp::R_POWERPC_DTPREL16: | |
6931 | case elfcpp::R_PPC64_TPREL16_DS: | |
6932 | case elfcpp::R_PPC64_DTPREL16_DS: | |
6933 | case elfcpp::R_PPC64_TOC16_DS: | |
6934 | case elfcpp::R_PPC64_GOT16_DS: | |
6935 | case elfcpp::R_PPC64_SECTOFF_DS: | |
6936 | case elfcpp::R_POWERPC_REL14: | |
6937 | case elfcpp::R_POWERPC_REL14_BRTAKEN: | |
6938 | case elfcpp::R_POWERPC_REL14_BRNTAKEN: | |
6939 | case elfcpp::R_POWERPC_GOT_TLSGD16: | |
6940 | case elfcpp::R_POWERPC_GOT_TLSLD16: | |
6941 | case elfcpp::R_POWERPC_GOT_TPREL16: | |
6942 | case elfcpp::R_POWERPC_GOT_DTPREL16: | |
f4baf0d4 | 6943 | overflow = Reloc::CHECK_SIGNED; |
42cacb20 | 6944 | break; |
dd93cd0a | 6945 | } |
42cacb20 | 6946 | |
3ea0a085 | 6947 | typename Powerpc_relocate_functions<size, big_endian>::Status status |
f4baf0d4 | 6948 | = Powerpc_relocate_functions<size, big_endian>::STATUS_OK; |
dd93cd0a AM |
6949 | switch (r_type) |
6950 | { | |
6951 | case elfcpp::R_POWERPC_NONE: | |
6952 | case elfcpp::R_POWERPC_TLS: | |
6953 | case elfcpp::R_POWERPC_GNU_VTINHERIT: | |
6954 | case elfcpp::R_POWERPC_GNU_VTENTRY: | |
6955 | case elfcpp::R_PPC_EMB_MRKREF: | |
42cacb20 DE |
6956 | break; |
6957 | ||
6958 | case elfcpp::R_PPC64_ADDR64: | |
dd93cd0a | 6959 | case elfcpp::R_PPC64_REL64: |
cf43a2fe | 6960 | case elfcpp::R_PPC64_TOC: |
dd93cd0a AM |
6961 | Reloc::addr64(view, value); |
6962 | break; | |
6963 | ||
6964 | case elfcpp::R_POWERPC_TPREL: | |
6965 | case elfcpp::R_POWERPC_DTPREL: | |
6966 | if (size == 64) | |
6967 | Reloc::addr64(view, value); | |
6968 | else | |
3ea0a085 | 6969 | status = Reloc::addr32(view, value, overflow); |
dd93cd0a AM |
6970 | break; |
6971 | ||
6972 | case elfcpp::R_PPC64_UADDR64: | |
6973 | Reloc::addr64_u(view, value); | |
42cacb20 DE |
6974 | break; |
6975 | ||
6976 | case elfcpp::R_POWERPC_ADDR32: | |
3ea0a085 | 6977 | status = Reloc::addr32(view, value, overflow); |
dd93cd0a AM |
6978 | break; |
6979 | ||
acc276d8 | 6980 | case elfcpp::R_POWERPC_REL32: |
dd93cd0a | 6981 | case elfcpp::R_POWERPC_UADDR32: |
3ea0a085 | 6982 | status = Reloc::addr32_u(view, value, overflow); |
dd93cd0a AM |
6983 | break; |
6984 | ||
6985 | case elfcpp::R_POWERPC_ADDR24: | |
6986 | case elfcpp::R_POWERPC_REL24: | |
6987 | case elfcpp::R_PPC_PLTREL24: | |
6988 | case elfcpp::R_PPC_LOCAL24PC: | |
3ea0a085 | 6989 | status = Reloc::addr24(view, value, overflow); |
42cacb20 DE |
6990 | break; |
6991 | ||
dd93cd0a AM |
6992 | case elfcpp::R_POWERPC_GOT_DTPREL16: |
6993 | case elfcpp::R_POWERPC_GOT_DTPREL16_LO: | |
6994 | if (size == 64) | |
6995 | { | |
3ea0a085 | 6996 | status = Reloc::addr16_ds(view, value, overflow); |
dd93cd0a AM |
6997 | break; |
6998 | } | |
cf43a2fe | 6999 | case elfcpp::R_POWERPC_ADDR16: |
dd93cd0a | 7000 | case elfcpp::R_POWERPC_REL16: |
cf43a2fe | 7001 | case elfcpp::R_PPC64_TOC16: |
42cacb20 | 7002 | case elfcpp::R_POWERPC_GOT16: |
cf43a2fe | 7003 | case elfcpp::R_POWERPC_SECTOFF: |
dd93cd0a AM |
7004 | case elfcpp::R_POWERPC_TPREL16: |
7005 | case elfcpp::R_POWERPC_DTPREL16: | |
7006 | case elfcpp::R_POWERPC_GOT_TLSGD16: | |
7007 | case elfcpp::R_POWERPC_GOT_TLSLD16: | |
7008 | case elfcpp::R_POWERPC_GOT_TPREL16: | |
cf43a2fe | 7009 | case elfcpp::R_POWERPC_ADDR16_LO: |
dd93cd0a | 7010 | case elfcpp::R_POWERPC_REL16_LO: |
cf43a2fe | 7011 | case elfcpp::R_PPC64_TOC16_LO: |
42cacb20 | 7012 | case elfcpp::R_POWERPC_GOT16_LO: |
cf43a2fe | 7013 | case elfcpp::R_POWERPC_SECTOFF_LO: |
dd93cd0a AM |
7014 | case elfcpp::R_POWERPC_TPREL16_LO: |
7015 | case elfcpp::R_POWERPC_DTPREL16_LO: | |
7016 | case elfcpp::R_POWERPC_GOT_TLSGD16_LO: | |
7017 | case elfcpp::R_POWERPC_GOT_TLSLD16_LO: | |
7018 | case elfcpp::R_POWERPC_GOT_TPREL16_LO: | |
3ea0a085 | 7019 | status = Reloc::addr16(view, value, overflow); |
dd93cd0a AM |
7020 | break; |
7021 | ||
7022 | case elfcpp::R_POWERPC_UADDR16: | |
3ea0a085 | 7023 | status = Reloc::addr16_u(view, value, overflow); |
42cacb20 DE |
7024 | break; |
7025 | ||
cf43a2fe | 7026 | case elfcpp::R_POWERPC_ADDR16_HI: |
dd93cd0a | 7027 | case elfcpp::R_POWERPC_REL16_HI: |
cf43a2fe | 7028 | case elfcpp::R_PPC64_TOC16_HI: |
42cacb20 | 7029 | case elfcpp::R_POWERPC_GOT16_HI: |
cf43a2fe | 7030 | case elfcpp::R_POWERPC_SECTOFF_HI: |
dd93cd0a AM |
7031 | case elfcpp::R_POWERPC_TPREL16_HI: |
7032 | case elfcpp::R_POWERPC_DTPREL16_HI: | |
7033 | case elfcpp::R_POWERPC_GOT_TLSGD16_HI: | |
7034 | case elfcpp::R_POWERPC_GOT_TLSLD16_HI: | |
7035 | case elfcpp::R_POWERPC_GOT_TPREL16_HI: | |
7036 | case elfcpp::R_POWERPC_GOT_DTPREL16_HI: | |
7037 | Reloc::addr16_hi(view, value); | |
42cacb20 DE |
7038 | break; |
7039 | ||
cf43a2fe | 7040 | case elfcpp::R_POWERPC_ADDR16_HA: |
dd93cd0a | 7041 | case elfcpp::R_POWERPC_REL16_HA: |
cf43a2fe | 7042 | case elfcpp::R_PPC64_TOC16_HA: |
42cacb20 | 7043 | case elfcpp::R_POWERPC_GOT16_HA: |
cf43a2fe | 7044 | case elfcpp::R_POWERPC_SECTOFF_HA: |
dd93cd0a AM |
7045 | case elfcpp::R_POWERPC_TPREL16_HA: |
7046 | case elfcpp::R_POWERPC_DTPREL16_HA: | |
7047 | case elfcpp::R_POWERPC_GOT_TLSGD16_HA: | |
7048 | case elfcpp::R_POWERPC_GOT_TLSLD16_HA: | |
7049 | case elfcpp::R_POWERPC_GOT_TPREL16_HA: | |
7050 | case elfcpp::R_POWERPC_GOT_DTPREL16_HA: | |
7051 | Reloc::addr16_ha(view, value); | |
42cacb20 DE |
7052 | break; |
7053 | ||
dd93cd0a AM |
7054 | case elfcpp::R_PPC64_DTPREL16_HIGHER: |
7055 | if (size == 32) | |
7056 | // R_PPC_EMB_NADDR16_LO | |
7057 | goto unsupp; | |
7058 | case elfcpp::R_PPC64_ADDR16_HIGHER: | |
7059 | case elfcpp::R_PPC64_TPREL16_HIGHER: | |
7060 | Reloc::addr16_hi2(view, value); | |
42cacb20 DE |
7061 | break; |
7062 | ||
dd93cd0a AM |
7063 | case elfcpp::R_PPC64_DTPREL16_HIGHERA: |
7064 | if (size == 32) | |
7065 | // R_PPC_EMB_NADDR16_HI | |
7066 | goto unsupp; | |
7067 | case elfcpp::R_PPC64_ADDR16_HIGHERA: | |
7068 | case elfcpp::R_PPC64_TPREL16_HIGHERA: | |
7069 | Reloc::addr16_ha2(view, value); | |
42cacb20 DE |
7070 | break; |
7071 | ||
dd93cd0a AM |
7072 | case elfcpp::R_PPC64_DTPREL16_HIGHEST: |
7073 | if (size == 32) | |
7074 | // R_PPC_EMB_NADDR16_HA | |
7075 | goto unsupp; | |
7076 | case elfcpp::R_PPC64_ADDR16_HIGHEST: | |
7077 | case elfcpp::R_PPC64_TPREL16_HIGHEST: | |
7078 | Reloc::addr16_hi3(view, value); | |
42cacb20 DE |
7079 | break; |
7080 | ||
dd93cd0a AM |
7081 | case elfcpp::R_PPC64_DTPREL16_HIGHESTA: |
7082 | if (size == 32) | |
7083 | // R_PPC_EMB_SDAI16 | |
7084 | goto unsupp; | |
7085 | case elfcpp::R_PPC64_ADDR16_HIGHESTA: | |
7086 | case elfcpp::R_PPC64_TPREL16_HIGHESTA: | |
7087 | Reloc::addr16_ha3(view, value); | |
7088 | break; | |
7089 | ||
7090 | case elfcpp::R_PPC64_DTPREL16_DS: | |
7091 | case elfcpp::R_PPC64_DTPREL16_LO_DS: | |
7092 | if (size == 32) | |
7093 | // R_PPC_EMB_NADDR32, R_PPC_EMB_NADDR16 | |
7094 | goto unsupp; | |
7095 | case elfcpp::R_PPC64_TPREL16_DS: | |
7096 | case elfcpp::R_PPC64_TPREL16_LO_DS: | |
7097 | if (size == 32) | |
7098 | // R_PPC_TLSGD, R_PPC_TLSLD | |
7099 | break; | |
cf43a2fe AM |
7100 | case elfcpp::R_PPC64_ADDR16_DS: |
7101 | case elfcpp::R_PPC64_ADDR16_LO_DS: | |
42cacb20 DE |
7102 | case elfcpp::R_PPC64_TOC16_DS: |
7103 | case elfcpp::R_PPC64_TOC16_LO_DS: | |
cf43a2fe AM |
7104 | case elfcpp::R_PPC64_GOT16_DS: |
7105 | case elfcpp::R_PPC64_GOT16_LO_DS: | |
7106 | case elfcpp::R_PPC64_SECTOFF_DS: | |
7107 | case elfcpp::R_PPC64_SECTOFF_LO_DS: | |
3ea0a085 | 7108 | status = Reloc::addr16_ds(view, value, overflow); |
dd93cd0a AM |
7109 | break; |
7110 | ||
7111 | case elfcpp::R_POWERPC_ADDR14: | |
7112 | case elfcpp::R_POWERPC_ADDR14_BRTAKEN: | |
7113 | case elfcpp::R_POWERPC_ADDR14_BRNTAKEN: | |
7114 | case elfcpp::R_POWERPC_REL14: | |
7115 | case elfcpp::R_POWERPC_REL14_BRTAKEN: | |
7116 | case elfcpp::R_POWERPC_REL14_BRNTAKEN: | |
3ea0a085 | 7117 | status = Reloc::addr14(view, value, overflow); |
42cacb20 DE |
7118 | break; |
7119 | ||
7120 | case elfcpp::R_POWERPC_COPY: | |
7121 | case elfcpp::R_POWERPC_GLOB_DAT: | |
7122 | case elfcpp::R_POWERPC_JMP_SLOT: | |
7123 | case elfcpp::R_POWERPC_RELATIVE: | |
42cacb20 | 7124 | case elfcpp::R_POWERPC_DTPMOD: |
dd93cd0a AM |
7125 | case elfcpp::R_PPC64_JMP_IREL: |
7126 | case elfcpp::R_POWERPC_IRELATIVE: | |
42cacb20 DE |
7127 | gold_error_at_location(relinfo, relnum, rela.get_r_offset(), |
7128 | _("unexpected reloc %u in object file"), | |
7129 | r_type); | |
7130 | break; | |
7131 | ||
dd93cd0a AM |
7132 | case elfcpp::R_PPC_EMB_SDA21: |
7133 | if (size == 32) | |
7134 | goto unsupp; | |
7135 | else | |
7136 | { | |
7137 | // R_PPC64_TOCSAVE. For the time being this can be ignored. | |
7138 | } | |
7139 | break; | |
7140 | ||
7141 | case elfcpp::R_PPC_EMB_SDA2I16: | |
7142 | case elfcpp::R_PPC_EMB_SDA2REL: | |
7143 | if (size == 32) | |
7144 | goto unsupp; | |
7145 | // R_PPC64_TLSGD, R_PPC64_TLSLD | |
6ce78956 AM |
7146 | break; |
7147 | ||
dd93cd0a AM |
7148 | case elfcpp::R_POWERPC_PLT32: |
7149 | case elfcpp::R_POWERPC_PLTREL32: | |
7150 | case elfcpp::R_POWERPC_PLT16_LO: | |
7151 | case elfcpp::R_POWERPC_PLT16_HI: | |
7152 | case elfcpp::R_POWERPC_PLT16_HA: | |
7153 | case elfcpp::R_PPC_SDAREL16: | |
7154 | case elfcpp::R_POWERPC_ADDR30: | |
7155 | case elfcpp::R_PPC64_PLT64: | |
7156 | case elfcpp::R_PPC64_PLTREL64: | |
7157 | case elfcpp::R_PPC64_PLTGOT16: | |
7158 | case elfcpp::R_PPC64_PLTGOT16_LO: | |
7159 | case elfcpp::R_PPC64_PLTGOT16_HI: | |
7160 | case elfcpp::R_PPC64_PLTGOT16_HA: | |
7161 | case elfcpp::R_PPC64_PLT16_LO_DS: | |
7162 | case elfcpp::R_PPC64_PLTGOT16_DS: | |
7163 | case elfcpp::R_PPC64_PLTGOT16_LO_DS: | |
7164 | case elfcpp::R_PPC_EMB_RELSEC16: | |
7165 | case elfcpp::R_PPC_EMB_RELST_LO: | |
7166 | case elfcpp::R_PPC_EMB_RELST_HI: | |
7167 | case elfcpp::R_PPC_EMB_RELST_HA: | |
7168 | case elfcpp::R_PPC_EMB_BIT_FLD: | |
7169 | case elfcpp::R_PPC_EMB_RELSDA: | |
7170 | case elfcpp::R_PPC_TOC16: | |
42cacb20 | 7171 | default: |
dd93cd0a | 7172 | unsupp: |
42cacb20 DE |
7173 | gold_error_at_location(relinfo, relnum, rela.get_r_offset(), |
7174 | _("unsupported reloc %u"), | |
7175 | r_type); | |
7176 | break; | |
7177 | } | |
f4baf0d4 | 7178 | if (status != Powerpc_relocate_functions<size, big_endian>::STATUS_OK) |
3ea0a085 AM |
7179 | gold_error_at_location(relinfo, relnum, rela.get_r_offset(), |
7180 | _("relocation overflow")); | |
42cacb20 DE |
7181 | |
7182 | return true; | |
7183 | } | |
7184 | ||
42cacb20 DE |
7185 | // Relocate section data. |
7186 | ||
7187 | template<int size, bool big_endian> | |
7188 | void | |
7189 | Target_powerpc<size, big_endian>::relocate_section( | |
d83ce4e3 AM |
7190 | const Relocate_info<size, big_endian>* relinfo, |
7191 | unsigned int sh_type, | |
7192 | const unsigned char* prelocs, | |
7193 | size_t reloc_count, | |
7194 | Output_section* output_section, | |
7195 | bool needs_special_offset_handling, | |
7196 | unsigned char* view, | |
c9269dff | 7197 | Address address, |
d83ce4e3 AM |
7198 | section_size_type view_size, |
7199 | const Reloc_symbol_changes* reloc_symbol_changes) | |
42cacb20 DE |
7200 | { |
7201 | typedef Target_powerpc<size, big_endian> Powerpc; | |
7202 | typedef typename Target_powerpc<size, big_endian>::Relocate Powerpc_relocate; | |
168a4726 AM |
7203 | typedef typename Target_powerpc<size, big_endian>::Relocate_comdat_behavior |
7204 | Powerpc_comdat_behavior; | |
42cacb20 DE |
7205 | |
7206 | gold_assert(sh_type == elfcpp::SHT_RELA); | |
7207 | ||
7208 | gold::relocate_section<size, big_endian, Powerpc, elfcpp::SHT_RELA, | |
168a4726 | 7209 | Powerpc_relocate, Powerpc_comdat_behavior>( |
42cacb20 DE |
7210 | relinfo, |
7211 | this, | |
7212 | prelocs, | |
7213 | reloc_count, | |
7214 | output_section, | |
7215 | needs_special_offset_handling, | |
7216 | view, | |
7217 | address, | |
364c7fa5 ILT |
7218 | view_size, |
7219 | reloc_symbol_changes); | |
42cacb20 DE |
7220 | } |
7221 | ||
cf43a2fe | 7222 | class Powerpc_scan_relocatable_reloc |
42cacb20 | 7223 | { |
cf43a2fe AM |
7224 | public: |
7225 | // Return the strategy to use for a local symbol which is not a | |
7226 | // section symbol, given the relocation type. | |
7227 | inline Relocatable_relocs::Reloc_strategy | |
7228 | local_non_section_strategy(unsigned int r_type, Relobj*, unsigned int r_sym) | |
7229 | { | |
7230 | if (r_type == 0 && r_sym == 0) | |
7231 | return Relocatable_relocs::RELOC_DISCARD; | |
7232 | return Relocatable_relocs::RELOC_COPY; | |
7233 | } | |
7234 | ||
7235 | // Return the strategy to use for a local symbol which is a section | |
7236 | // symbol, given the relocation type. | |
7237 | inline Relocatable_relocs::Reloc_strategy | |
7238 | local_section_strategy(unsigned int, Relobj*) | |
7239 | { | |
7240 | return Relocatable_relocs::RELOC_ADJUST_FOR_SECTION_RELA; | |
7241 | } | |
7242 | ||
7243 | // Return the strategy to use for a global symbol, given the | |
7244 | // relocation type, the object, and the symbol index. | |
7245 | inline Relocatable_relocs::Reloc_strategy | |
7246 | global_strategy(unsigned int r_type, Relobj*, unsigned int) | |
7247 | { | |
7248 | if (r_type == elfcpp::R_PPC_PLTREL24) | |
7249 | return Relocatable_relocs::RELOC_SPECIAL; | |
7250 | return Relocatable_relocs::RELOC_COPY; | |
7251 | } | |
7252 | }; | |
42cacb20 DE |
7253 | |
7254 | // Scan the relocs during a relocatable link. | |
7255 | ||
7256 | template<int size, bool big_endian> | |
7257 | void | |
7258 | Target_powerpc<size, big_endian>::scan_relocatable_relocs( | |
d83ce4e3 AM |
7259 | Symbol_table* symtab, |
7260 | Layout* layout, | |
7261 | Sized_relobj_file<size, big_endian>* object, | |
7262 | unsigned int data_shndx, | |
7263 | unsigned int sh_type, | |
7264 | const unsigned char* prelocs, | |
7265 | size_t reloc_count, | |
7266 | Output_section* output_section, | |
7267 | bool needs_special_offset_handling, | |
7268 | size_t local_symbol_count, | |
7269 | const unsigned char* plocal_symbols, | |
7270 | Relocatable_relocs* rr) | |
42cacb20 DE |
7271 | { |
7272 | gold_assert(sh_type == elfcpp::SHT_RELA); | |
7273 | ||
42cacb20 | 7274 | gold::scan_relocatable_relocs<size, big_endian, elfcpp::SHT_RELA, |
d83ce4e3 | 7275 | Powerpc_scan_relocatable_reloc>( |
42cacb20 DE |
7276 | symtab, |
7277 | layout, | |
7278 | object, | |
7279 | data_shndx, | |
7280 | prelocs, | |
7281 | reloc_count, | |
7282 | output_section, | |
7283 | needs_special_offset_handling, | |
7284 | local_symbol_count, | |
7285 | plocal_symbols, | |
7286 | rr); | |
7287 | } | |
7288 | ||
7404fe1b | 7289 | // Emit relocations for a section. |
dd93cd0a AM |
7290 | // This is a modified version of the function by the same name in |
7291 | // target-reloc.h. Using relocate_special_relocatable for | |
7292 | // R_PPC_PLTREL24 would require duplication of the entire body of the | |
7293 | // loop, so we may as well duplicate the whole thing. | |
42cacb20 DE |
7294 | |
7295 | template<int size, bool big_endian> | |
7296 | void | |
7404fe1b | 7297 | Target_powerpc<size, big_endian>::relocate_relocs( |
42cacb20 DE |
7298 | const Relocate_info<size, big_endian>* relinfo, |
7299 | unsigned int sh_type, | |
7300 | const unsigned char* prelocs, | |
7301 | size_t reloc_count, | |
7302 | Output_section* output_section, | |
62fe925a | 7303 | typename elfcpp::Elf_types<size>::Elf_Off offset_in_output_section, |
42cacb20 | 7304 | const Relocatable_relocs* rr, |
cf43a2fe | 7305 | unsigned char*, |
dd93cd0a | 7306 | Address view_address, |
cf43a2fe | 7307 | section_size_type, |
42cacb20 DE |
7308 | unsigned char* reloc_view, |
7309 | section_size_type reloc_view_size) | |
7310 | { | |
7311 | gold_assert(sh_type == elfcpp::SHT_RELA); | |
7312 | ||
cf43a2fe AM |
7313 | typedef typename Reloc_types<elfcpp::SHT_RELA, size, big_endian>::Reloc |
7314 | Reltype; | |
7315 | typedef typename Reloc_types<elfcpp::SHT_RELA, size, big_endian>::Reloc_write | |
7316 | Reltype_write; | |
7317 | const int reloc_size | |
7318 | = Reloc_types<elfcpp::SHT_RELA, size, big_endian>::reloc_size; | |
cf43a2fe AM |
7319 | |
7320 | Powerpc_relobj<size, big_endian>* const object | |
7321 | = static_cast<Powerpc_relobj<size, big_endian>*>(relinfo->object); | |
7322 | const unsigned int local_count = object->local_symbol_count(); | |
7323 | unsigned int got2_shndx = object->got2_shndx(); | |
c9269dff | 7324 | Address got2_addend = 0; |
cf43a2fe | 7325 | if (got2_shndx != 0) |
c9269dff AM |
7326 | { |
7327 | got2_addend = object->get_output_section_offset(got2_shndx); | |
7328 | gold_assert(got2_addend != invalid_address); | |
7329 | } | |
cf43a2fe AM |
7330 | |
7331 | unsigned char* pwrite = reloc_view; | |
7404fe1b | 7332 | bool zap_next = false; |
cf43a2fe AM |
7333 | for (size_t i = 0; i < reloc_count; ++i, prelocs += reloc_size) |
7334 | { | |
7335 | Relocatable_relocs::Reloc_strategy strategy = rr->strategy(i); | |
7336 | if (strategy == Relocatable_relocs::RELOC_DISCARD) | |
7337 | continue; | |
7338 | ||
7339 | Reltype reloc(prelocs); | |
7340 | Reltype_write reloc_write(pwrite); | |
7341 | ||
7404fe1b | 7342 | Address offset = reloc.get_r_offset(); |
cf43a2fe | 7343 | typename elfcpp::Elf_types<size>::Elf_WXword r_info = reloc.get_r_info(); |
7404fe1b AM |
7344 | unsigned int r_sym = elfcpp::elf_r_sym<size>(r_info); |
7345 | unsigned int r_type = elfcpp::elf_r_type<size>(r_info); | |
7346 | const unsigned int orig_r_sym = r_sym; | |
7347 | typename elfcpp::Elf_types<size>::Elf_Swxword addend | |
7348 | = reloc.get_r_addend(); | |
7349 | const Symbol* gsym = NULL; | |
7350 | ||
7351 | if (zap_next) | |
7352 | { | |
7353 | // We could arrange to discard these and other relocs for | |
7354 | // tls optimised sequences in the strategy methods, but for | |
7355 | // now do as BFD ld does. | |
7356 | r_type = elfcpp::R_POWERPC_NONE; | |
7357 | zap_next = false; | |
7358 | } | |
cf43a2fe AM |
7359 | |
7360 | // Get the new symbol index. | |
cf43a2fe AM |
7361 | if (r_sym < local_count) |
7362 | { | |
7363 | switch (strategy) | |
7364 | { | |
7365 | case Relocatable_relocs::RELOC_COPY: | |
7366 | case Relocatable_relocs::RELOC_SPECIAL: | |
7404fe1b | 7367 | if (r_sym != 0) |
dd93cd0a | 7368 | { |
7404fe1b AM |
7369 | r_sym = object->symtab_index(r_sym); |
7370 | gold_assert(r_sym != -1U); | |
dd93cd0a | 7371 | } |
cf43a2fe AM |
7372 | break; |
7373 | ||
7374 | case Relocatable_relocs::RELOC_ADJUST_FOR_SECTION_RELA: | |
7375 | { | |
7376 | // We are adjusting a section symbol. We need to find | |
7377 | // the symbol table index of the section symbol for | |
7378 | // the output section corresponding to input section | |
7379 | // in which this symbol is defined. | |
7380 | gold_assert(r_sym < local_count); | |
7381 | bool is_ordinary; | |
7382 | unsigned int shndx = | |
7383 | object->local_symbol_input_shndx(r_sym, &is_ordinary); | |
7384 | gold_assert(is_ordinary); | |
7385 | Output_section* os = object->output_section(shndx); | |
7386 | gold_assert(os != NULL); | |
7387 | gold_assert(os->needs_symtab_index()); | |
7404fe1b | 7388 | r_sym = os->symtab_index(); |
cf43a2fe AM |
7389 | } |
7390 | break; | |
7391 | ||
7392 | default: | |
7393 | gold_unreachable(); | |
7394 | } | |
7395 | } | |
7396 | else | |
7397 | { | |
7404fe1b | 7398 | gsym = object->global_symbol(r_sym); |
cf43a2fe AM |
7399 | gold_assert(gsym != NULL); |
7400 | if (gsym->is_forwarder()) | |
7401 | gsym = relinfo->symtab->resolve_forwards(gsym); | |
7402 | ||
7403 | gold_assert(gsym->has_symtab_index()); | |
7404fe1b | 7404 | r_sym = gsym->symtab_index(); |
cf43a2fe AM |
7405 | } |
7406 | ||
7407 | // Get the new offset--the location in the output section where | |
7408 | // this relocation should be applied. | |
cf43a2fe | 7409 | if (static_cast<Address>(offset_in_output_section) != invalid_address) |
7404fe1b | 7410 | offset += offset_in_output_section; |
cf43a2fe AM |
7411 | else |
7412 | { | |
c9269dff AM |
7413 | section_offset_type sot_offset = |
7414 | convert_types<section_offset_type, Address>(offset); | |
cf43a2fe | 7415 | section_offset_type new_sot_offset = |
c9269dff AM |
7416 | output_section->output_offset(object, relinfo->data_shndx, |
7417 | sot_offset); | |
cf43a2fe | 7418 | gold_assert(new_sot_offset != -1); |
7404fe1b | 7419 | offset = new_sot_offset; |
cf43a2fe AM |
7420 | } |
7421 | ||
dd93cd0a AM |
7422 | // In an object file, r_offset is an offset within the section. |
7423 | // In an executable or dynamic object, generated by | |
7424 | // --emit-relocs, r_offset is an absolute address. | |
7404fe1b | 7425 | if (!parameters->options().relocatable()) |
dd93cd0a | 7426 | { |
7404fe1b | 7427 | offset += view_address; |
dd93cd0a | 7428 | if (static_cast<Address>(offset_in_output_section) != invalid_address) |
7404fe1b | 7429 | offset -= offset_in_output_section; |
dd93cd0a AM |
7430 | } |
7431 | ||
cf43a2fe | 7432 | // Handle the reloc addend based on the strategy. |
cf43a2fe AM |
7433 | if (strategy == Relocatable_relocs::RELOC_COPY) |
7434 | ; | |
7435 | else if (strategy == Relocatable_relocs::RELOC_ADJUST_FOR_SECTION_RELA) | |
7436 | { | |
7404fe1b | 7437 | const Symbol_value<size>* psymval = object->local_symbol(orig_r_sym); |
cf43a2fe AM |
7438 | addend = psymval->value(object, addend); |
7439 | } | |
7440 | else if (strategy == Relocatable_relocs::RELOC_SPECIAL) | |
7441 | { | |
7442 | if (addend >= 32768) | |
7443 | addend += got2_addend; | |
7444 | } | |
7445 | else | |
7446 | gold_unreachable(); | |
7447 | ||
7404fe1b AM |
7448 | if (!parameters->options().relocatable()) |
7449 | { | |
7450 | if (r_type == elfcpp::R_POWERPC_GOT_TLSGD16 | |
7451 | || r_type == elfcpp::R_POWERPC_GOT_TLSGD16_LO | |
7452 | || r_type == elfcpp::R_POWERPC_GOT_TLSGD16_HI | |
7453 | || r_type == elfcpp::R_POWERPC_GOT_TLSGD16_HA) | |
7454 | { | |
7455 | // First instruction of a global dynamic sequence, | |
7456 | // arg setup insn. | |
7457 | const bool final = gsym == NULL || gsym->final_value_is_known(); | |
7458 | switch (this->optimize_tls_gd(final)) | |
7459 | { | |
7460 | case tls::TLSOPT_TO_IE: | |
7461 | r_type += (elfcpp::R_POWERPC_GOT_TPREL16 | |
7462 | - elfcpp::R_POWERPC_GOT_TLSGD16); | |
7463 | break; | |
7464 | case tls::TLSOPT_TO_LE: | |
7465 | if (r_type == elfcpp::R_POWERPC_GOT_TLSGD16 | |
7466 | || r_type == elfcpp::R_POWERPC_GOT_TLSGD16_LO) | |
7467 | r_type = elfcpp::R_POWERPC_TPREL16_HA; | |
7468 | else | |
7469 | { | |
7470 | r_type = elfcpp::R_POWERPC_NONE; | |
7471 | offset -= 2 * big_endian; | |
7472 | } | |
7473 | break; | |
7474 | default: | |
7475 | break; | |
7476 | } | |
7477 | } | |
7478 | else if (r_type == elfcpp::R_POWERPC_GOT_TLSLD16 | |
7479 | || r_type == elfcpp::R_POWERPC_GOT_TLSLD16_LO | |
7480 | || r_type == elfcpp::R_POWERPC_GOT_TLSLD16_HI | |
7481 | || r_type == elfcpp::R_POWERPC_GOT_TLSLD16_HA) | |
7482 | { | |
7483 | // First instruction of a local dynamic sequence, | |
7484 | // arg setup insn. | |
7485 | if (this->optimize_tls_ld() == tls::TLSOPT_TO_LE) | |
7486 | { | |
7487 | if (r_type == elfcpp::R_POWERPC_GOT_TLSLD16 | |
7488 | || r_type == elfcpp::R_POWERPC_GOT_TLSLD16_LO) | |
7489 | { | |
7490 | r_type = elfcpp::R_POWERPC_TPREL16_HA; | |
7491 | const Output_section* os = relinfo->layout->tls_segment() | |
7492 | ->first_section(); | |
7493 | gold_assert(os != NULL); | |
7494 | gold_assert(os->needs_symtab_index()); | |
7495 | r_sym = os->symtab_index(); | |
7496 | addend = dtp_offset; | |
7497 | } | |
7498 | else | |
7499 | { | |
7500 | r_type = elfcpp::R_POWERPC_NONE; | |
7501 | offset -= 2 * big_endian; | |
7502 | } | |
7503 | } | |
7504 | } | |
7505 | else if (r_type == elfcpp::R_POWERPC_GOT_TPREL16 | |
7506 | || r_type == elfcpp::R_POWERPC_GOT_TPREL16_LO | |
7507 | || r_type == elfcpp::R_POWERPC_GOT_TPREL16_HI | |
7508 | || r_type == elfcpp::R_POWERPC_GOT_TPREL16_HA) | |
7509 | { | |
7510 | // First instruction of initial exec sequence. | |
7511 | const bool final = gsym == NULL || gsym->final_value_is_known(); | |
7512 | if (this->optimize_tls_ie(final) == tls::TLSOPT_TO_LE) | |
7513 | { | |
7514 | if (r_type == elfcpp::R_POWERPC_GOT_TPREL16 | |
7515 | || r_type == elfcpp::R_POWERPC_GOT_TPREL16_LO) | |
7516 | r_type = elfcpp::R_POWERPC_TPREL16_HA; | |
7517 | else | |
7518 | { | |
7519 | r_type = elfcpp::R_POWERPC_NONE; | |
7520 | offset -= 2 * big_endian; | |
7521 | } | |
7522 | } | |
7523 | } | |
7524 | else if ((size == 64 && r_type == elfcpp::R_PPC64_TLSGD) | |
7525 | || (size == 32 && r_type == elfcpp::R_PPC_TLSGD)) | |
7526 | { | |
7527 | // Second instruction of a global dynamic sequence, | |
7528 | // the __tls_get_addr call | |
7529 | const bool final = gsym == NULL || gsym->final_value_is_known(); | |
7530 | switch (this->optimize_tls_gd(final)) | |
7531 | { | |
7532 | case tls::TLSOPT_TO_IE: | |
7533 | r_type = elfcpp::R_POWERPC_NONE; | |
7534 | zap_next = true; | |
7535 | break; | |
7536 | case tls::TLSOPT_TO_LE: | |
7537 | r_type = elfcpp::R_POWERPC_TPREL16_LO; | |
7538 | offset += 2 * big_endian; | |
7539 | zap_next = true; | |
7540 | break; | |
7541 | default: | |
7542 | break; | |
7543 | } | |
7544 | } | |
7545 | else if ((size == 64 && r_type == elfcpp::R_PPC64_TLSLD) | |
7546 | || (size == 32 && r_type == elfcpp::R_PPC_TLSLD)) | |
7547 | { | |
7548 | // Second instruction of a local dynamic sequence, | |
7549 | // the __tls_get_addr call | |
7550 | if (this->optimize_tls_ld() == tls::TLSOPT_TO_LE) | |
7551 | { | |
7552 | const Output_section* os = relinfo->layout->tls_segment() | |
7553 | ->first_section(); | |
7554 | gold_assert(os != NULL); | |
7555 | gold_assert(os->needs_symtab_index()); | |
7556 | r_sym = os->symtab_index(); | |
7557 | addend = dtp_offset; | |
7558 | r_type = elfcpp::R_POWERPC_TPREL16_LO; | |
7559 | offset += 2 * big_endian; | |
7560 | zap_next = true; | |
7561 | } | |
7562 | } | |
7563 | else if (r_type == elfcpp::R_POWERPC_TLS) | |
7564 | { | |
7565 | // Second instruction of an initial exec sequence | |
7566 | const bool final = gsym == NULL || gsym->final_value_is_known(); | |
7567 | if (this->optimize_tls_ie(final) == tls::TLSOPT_TO_LE) | |
7568 | { | |
7569 | r_type = elfcpp::R_POWERPC_TPREL16_LO; | |
7570 | offset += 2 * big_endian; | |
7571 | } | |
7572 | } | |
7573 | } | |
7574 | ||
7575 | reloc_write.put_r_offset(offset); | |
7576 | reloc_write.put_r_info(elfcpp::elf_r_info<size>(r_sym, r_type)); | |
7577 | reloc_write.put_r_addend(addend); | |
cf43a2fe AM |
7578 | |
7579 | pwrite += reloc_size; | |
7580 | } | |
7581 | ||
7582 | gold_assert(static_cast<section_size_type>(pwrite - reloc_view) | |
7583 | == reloc_view_size); | |
42cacb20 DE |
7584 | } |
7585 | ||
ec661b9d | 7586 | // Return the value to use for a dynamic symbol which requires special |
42cacb20 DE |
7587 | // treatment. This is how we support equality comparisons of function |
7588 | // pointers across shared library boundaries, as described in the | |
7589 | // processor specific ABI supplement. | |
7590 | ||
7591 | template<int size, bool big_endian> | |
7592 | uint64_t | |
7593 | Target_powerpc<size, big_endian>::do_dynsym_value(const Symbol* gsym) const | |
7594 | { | |
cf43a2fe AM |
7595 | if (size == 32) |
7596 | { | |
7597 | gold_assert(gsym->is_from_dynobj() && gsym->has_plt_offset()); | |
ec661b9d AM |
7598 | for (typename Stub_tables::const_iterator p = this->stub_tables_.begin(); |
7599 | p != this->stub_tables_.end(); | |
7600 | ++p) | |
7601 | { | |
7602 | Address off = (*p)->find_plt_call_entry(gsym); | |
7603 | if (off != invalid_address) | |
7604 | return (*p)->stub_address() + off; | |
7605 | } | |
c9824451 | 7606 | } |
ec661b9d | 7607 | gold_unreachable(); |
c9824451 AM |
7608 | } |
7609 | ||
7610 | // Return the PLT address to use for a local symbol. | |
7611 | template<int size, bool big_endian> | |
7612 | uint64_t | |
7613 | Target_powerpc<size, big_endian>::do_plt_address_for_local( | |
7614 | const Relobj* object, | |
7615 | unsigned int symndx) const | |
7616 | { | |
7617 | if (size == 32) | |
7618 | { | |
7619 | const Sized_relobj<size, big_endian>* relobj | |
7620 | = static_cast<const Sized_relobj<size, big_endian>*>(object); | |
ec661b9d AM |
7621 | for (typename Stub_tables::const_iterator p = this->stub_tables_.begin(); |
7622 | p != this->stub_tables_.end(); | |
7623 | ++p) | |
7624 | { | |
7625 | Address off = (*p)->find_plt_call_entry(relobj->sized_relobj(), | |
7626 | symndx); | |
7627 | if (off != invalid_address) | |
7628 | return (*p)->stub_address() + off; | |
7629 | } | |
c9824451 | 7630 | } |
ec661b9d | 7631 | gold_unreachable(); |
c9824451 AM |
7632 | } |
7633 | ||
7634 | // Return the PLT address to use for a global symbol. | |
7635 | template<int size, bool big_endian> | |
7636 | uint64_t | |
7637 | Target_powerpc<size, big_endian>::do_plt_address_for_global( | |
7638 | const Symbol* gsym) const | |
7639 | { | |
7640 | if (size == 32) | |
7641 | { | |
ec661b9d AM |
7642 | for (typename Stub_tables::const_iterator p = this->stub_tables_.begin(); |
7643 | p != this->stub_tables_.end(); | |
7644 | ++p) | |
7645 | { | |
7646 | Address off = (*p)->find_plt_call_entry(gsym); | |
7647 | if (off != invalid_address) | |
7648 | return (*p)->stub_address() + off; | |
7649 | } | |
cf43a2fe | 7650 | } |
ec661b9d | 7651 | gold_unreachable(); |
42cacb20 DE |
7652 | } |
7653 | ||
bd73a62d AM |
7654 | // Return the offset to use for the GOT_INDX'th got entry which is |
7655 | // for a local tls symbol specified by OBJECT, SYMNDX. | |
7656 | template<int size, bool big_endian> | |
7657 | int64_t | |
7658 | Target_powerpc<size, big_endian>::do_tls_offset_for_local( | |
7659 | const Relobj* object, | |
7660 | unsigned int symndx, | |
7661 | unsigned int got_indx) const | |
7662 | { | |
7663 | const Powerpc_relobj<size, big_endian>* ppc_object | |
7664 | = static_cast<const Powerpc_relobj<size, big_endian>*>(object); | |
7665 | if (ppc_object->local_symbol(symndx)->is_tls_symbol()) | |
7666 | { | |
7667 | for (Got_type got_type = GOT_TYPE_TLSGD; | |
7668 | got_type <= GOT_TYPE_TPREL; | |
7669 | got_type = Got_type(got_type + 1)) | |
7670 | if (ppc_object->local_has_got_offset(symndx, got_type)) | |
7671 | { | |
7672 | unsigned int off = ppc_object->local_got_offset(symndx, got_type); | |
7673 | if (got_type == GOT_TYPE_TLSGD) | |
7674 | off += size / 8; | |
7675 | if (off == got_indx * (size / 8)) | |
7676 | { | |
7677 | if (got_type == GOT_TYPE_TPREL) | |
7678 | return -tp_offset; | |
7679 | else | |
7680 | return -dtp_offset; | |
7681 | } | |
7682 | } | |
7683 | } | |
7684 | gold_unreachable(); | |
7685 | } | |
7686 | ||
7687 | // Return the offset to use for the GOT_INDX'th got entry which is | |
7688 | // for global tls symbol GSYM. | |
7689 | template<int size, bool big_endian> | |
7690 | int64_t | |
7691 | Target_powerpc<size, big_endian>::do_tls_offset_for_global( | |
7692 | Symbol* gsym, | |
7693 | unsigned int got_indx) const | |
7694 | { | |
7695 | if (gsym->type() == elfcpp::STT_TLS) | |
7696 | { | |
7697 | for (Got_type got_type = GOT_TYPE_TLSGD; | |
7698 | got_type <= GOT_TYPE_TPREL; | |
7699 | got_type = Got_type(got_type + 1)) | |
7700 | if (gsym->has_got_offset(got_type)) | |
7701 | { | |
7702 | unsigned int off = gsym->got_offset(got_type); | |
7703 | if (got_type == GOT_TYPE_TLSGD) | |
7704 | off += size / 8; | |
7705 | if (off == got_indx * (size / 8)) | |
7706 | { | |
7707 | if (got_type == GOT_TYPE_TPREL) | |
7708 | return -tp_offset; | |
7709 | else | |
7710 | return -dtp_offset; | |
7711 | } | |
7712 | } | |
7713 | } | |
7714 | gold_unreachable(); | |
7715 | } | |
7716 | ||
42cacb20 DE |
7717 | // The selector for powerpc object files. |
7718 | ||
7719 | template<int size, bool big_endian> | |
7720 | class Target_selector_powerpc : public Target_selector | |
7721 | { | |
7722 | public: | |
7723 | Target_selector_powerpc() | |
edc27beb AM |
7724 | : Target_selector(size == 64 ? elfcpp::EM_PPC64 : elfcpp::EM_PPC, |
7725 | size, big_endian, | |
03ef7571 ILT |
7726 | (size == 64 |
7727 | ? (big_endian ? "elf64-powerpc" : "elf64-powerpcle") | |
7728 | : (big_endian ? "elf32-powerpc" : "elf32-powerpcle")), | |
7729 | (size == 64 | |
7730 | ? (big_endian ? "elf64ppc" : "elf64lppc") | |
7731 | : (big_endian ? "elf32ppc" : "elf32lppc"))) | |
42cacb20 DE |
7732 | { } |
7733 | ||
2e702c99 RM |
7734 | virtual Target* |
7735 | do_instantiate_target() | |
7f055c20 | 7736 | { return new Target_powerpc<size, big_endian>(); } |
42cacb20 DE |
7737 | }; |
7738 | ||
7739 | Target_selector_powerpc<32, true> target_selector_ppc32; | |
7740 | Target_selector_powerpc<32, false> target_selector_ppc32le; | |
7741 | Target_selector_powerpc<64, true> target_selector_ppc64; | |
7742 | Target_selector_powerpc<64, false> target_selector_ppc64le; | |
7743 | ||
decdd3bc AM |
7744 | // Instantiate these constants for -O0 |
7745 | template<int size, bool big_endian> | |
7746 | const int Output_data_glink<size, big_endian>::pltresolve_size; | |
7747 | template<int size, bool big_endian> | |
7748 | const typename Stub_table<size, big_endian>::Address | |
7749 | Stub_table<size, big_endian>::invalid_address; | |
7750 | template<int size, bool big_endian> | |
7751 | const typename Target_powerpc<size, big_endian>::Address | |
7752 | Target_powerpc<size, big_endian>::invalid_address; | |
7753 | ||
42cacb20 | 7754 | } // End anonymous namespace. |