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42cacb20 DE |
1 | // powerpc.cc -- powerpc target support for gold. |
2 | ||
2e702c99 | 3 | // Copyright 2008, 2009, 2010, 2011, 2012 Free Software Foundation, Inc. |
42cacb20 DE |
4 | // Written by David S. Miller <davem@davemloft.net> |
5 | // and David Edelsohn <edelsohn@gnu.org> | |
6 | ||
7 | // This file is part of gold. | |
8 | ||
9 | // This program is free software; you can redistribute it and/or modify | |
10 | // it under the terms of the GNU General Public License as published by | |
11 | // the Free Software Foundation; either version 3 of the License, or | |
12 | // (at your option) any later version. | |
13 | ||
14 | // This program is distributed in the hope that it will be useful, | |
15 | // but WITHOUT ANY WARRANTY; without even the implied warranty of | |
16 | // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
17 | // GNU General Public License for more details. | |
18 | ||
19 | // You should have received a copy of the GNU General Public License | |
20 | // along with this program; if not, write to the Free Software | |
21 | // Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston, | |
22 | // MA 02110-1301, USA. | |
23 | ||
24 | #include "gold.h" | |
25 | ||
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), | |
446 | dynbss_(NULL), 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 | { | |
738 | elfcpp::Swap<32, big_endian>::writeval(oview + p->second, p->first); | |
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 | |
42cacb20 DE |
902 | private: |
903 | static void | |
6fa2a40b | 904 | unsupported_reloc_local(Sized_relobj_file<size, big_endian>*, |
42cacb20 DE |
905 | unsigned int r_type); |
906 | ||
907 | static void | |
6fa2a40b | 908 | unsupported_reloc_global(Sized_relobj_file<size, big_endian>*, |
42cacb20 DE |
909 | unsigned int r_type, Symbol*); |
910 | ||
911 | static void | |
912 | generate_tls_call(Symbol_table* symtab, Layout* layout, | |
913 | Target_powerpc* target); | |
914 | ||
915 | void | |
916 | check_non_pic(Relobj*, unsigned int r_type); | |
917 | ||
e5d5f5ed AM |
918 | bool |
919 | reloc_needs_plt_for_ifunc(Sized_relobj_file<size, big_endian>* object, | |
920 | unsigned int r_type); | |
921 | ||
42cacb20 DE |
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 | ||
42cacb20 DE |
1071 | // Copy a relocation against a global symbol. |
1072 | void | |
ef9beddf | 1073 | copy_reloc(Symbol_table* symtab, Layout* layout, |
2e702c99 | 1074 | Sized_relobj_file<size, big_endian>* object, |
42cacb20 DE |
1075 | unsigned int shndx, Output_section* output_section, |
1076 | Symbol* sym, const elfcpp::Rela<size, big_endian>& reloc) | |
1077 | { | |
1078 | this->copy_relocs_.copy_reloc(symtab, layout, | |
1079 | symtab->get_sized_symbol<size>(sym), | |
1080 | object, shndx, output_section, | |
1081 | reloc, this->rela_dyn_section(layout)); | |
1082 | } | |
1083 | ||
ec661b9d AM |
1084 | // Look over all the input sections, deciding where to place stub. |
1085 | void | |
1086 | group_sections(Layout*, const Task*); | |
1087 | ||
1088 | // Sort output sections by address. | |
1089 | struct Sort_sections | |
1090 | { | |
1091 | bool | |
1092 | operator()(const Output_section* sec1, const Output_section* sec2) | |
1093 | { return sec1->address() < sec2->address(); } | |
1094 | }; | |
1095 | ||
1096 | class Branch_info | |
1097 | { | |
1098 | public: | |
1099 | Branch_info(Powerpc_relobj<size, big_endian>* ppc_object, | |
1100 | unsigned int data_shndx, | |
1101 | Address r_offset, | |
1102 | unsigned int r_type, | |
1103 | unsigned int r_sym, | |
1104 | Address addend) | |
1105 | : object_(ppc_object), shndx_(data_shndx), offset_(r_offset), | |
1106 | r_type_(r_type), r_sym_(r_sym), addend_(addend) | |
1107 | { } | |
1108 | ||
1109 | ~Branch_info() | |
1110 | { } | |
1111 | ||
1112 | // If this branch needs a plt call stub, or a long branch stub, make one. | |
1113 | void | |
1114 | make_stub(Stub_table<size, big_endian>*, | |
1115 | Stub_table<size, big_endian>*, | |
1116 | Symbol_table*) const; | |
1117 | ||
1118 | private: | |
1119 | // The branch location.. | |
1120 | Powerpc_relobj<size, big_endian>* object_; | |
1121 | unsigned int shndx_; | |
1122 | Address offset_; | |
1123 | // ..and the branch type and destination. | |
1124 | unsigned int r_type_; | |
1125 | unsigned int r_sym_; | |
1126 | Address addend_; | |
1127 | }; | |
1128 | ||
42cacb20 DE |
1129 | // Information about this specific target which we pass to the |
1130 | // general Target structure. | |
1131 | static Target::Target_info powerpc_info; | |
1132 | ||
1133 | // The types of GOT entries needed for this platform. | |
0e70b911 CC |
1134 | // These values are exposed to the ABI in an incremental link. |
1135 | // Do not renumber existing values without changing the version | |
1136 | // number of the .gnu_incremental_inputs section. | |
42cacb20 DE |
1137 | enum Got_type |
1138 | { | |
dd93cd0a AM |
1139 | GOT_TYPE_STANDARD, |
1140 | GOT_TYPE_TLSGD, // double entry for @got@tlsgd | |
1141 | GOT_TYPE_DTPREL, // entry for @got@dtprel | |
1142 | GOT_TYPE_TPREL // entry for @got@tprel | |
42cacb20 DE |
1143 | }; |
1144 | ||
ec661b9d | 1145 | // The GOT section. |
cf43a2fe | 1146 | Output_data_got_powerpc<size, big_endian>* got_; |
ec661b9d | 1147 | // The PLT section. |
42cacb20 | 1148 | Output_data_plt_powerpc<size, big_endian>* plt_; |
ec661b9d | 1149 | // The IPLT section. |
e5d5f5ed | 1150 | Output_data_plt_powerpc<size, big_endian>* iplt_; |
ec661b9d AM |
1151 | // Section holding long branch destinations. |
1152 | Output_data_brlt_powerpc<size, big_endian>* brlt_section_; | |
1153 | // The .glink section. | |
cf43a2fe | 1154 | Output_data_glink<size, big_endian>* glink_; |
ec661b9d | 1155 | // The dynamic reloc section. |
42cacb20 DE |
1156 | Reloc_section* rela_dyn_; |
1157 | // Relocs saved to avoid a COPY reloc. | |
1158 | Copy_relocs<elfcpp::SHT_RELA, size, big_endian> copy_relocs_; | |
1159 | // Space for variables copied with a COPY reloc. | |
1160 | Output_data_space* dynbss_; | |
dd93cd0a AM |
1161 | // Offset of the GOT entry for local dynamic __tls_get_addr calls. |
1162 | unsigned int tlsld_got_offset_; | |
ec661b9d AM |
1163 | |
1164 | Stub_tables stub_tables_; | |
1165 | typedef Unordered_map<Address, unsigned int> Branch_lookup_table; | |
1166 | Branch_lookup_table branch_lookup_table_; | |
1167 | ||
1168 | typedef std::vector<Branch_info> Branches; | |
1169 | Branches branch_info_; | |
9e69ed50 AM |
1170 | |
1171 | bool plt_thread_safe_; | |
42cacb20 DE |
1172 | }; |
1173 | ||
1174 | template<> | |
1175 | Target::Target_info Target_powerpc<32, true>::powerpc_info = | |
1176 | { | |
1177 | 32, // size | |
1178 | true, // is_big_endian | |
1179 | elfcpp::EM_PPC, // machine_code | |
1180 | false, // has_make_symbol | |
1181 | false, // has_resolve | |
1182 | false, // has_code_fill | |
1183 | true, // is_default_stack_executable | |
b3ce541e | 1184 | false, // can_icf_inline_merge_sections |
42cacb20 DE |
1185 | '\0', // wrap_char |
1186 | "/usr/lib/ld.so.1", // dynamic_linker | |
1187 | 0x10000000, // default_text_segment_address | |
1188 | 64 * 1024, // abi_pagesize (overridable by -z max-page-size) | |
8a5e3e08 | 1189 | 4 * 1024, // common_pagesize (overridable by -z common-page-size) |
c9269dff AM |
1190 | false, // isolate_execinstr |
1191 | 0, // rosegment_gap | |
8a5e3e08 ILT |
1192 | elfcpp::SHN_UNDEF, // small_common_shndx |
1193 | elfcpp::SHN_UNDEF, // large_common_shndx | |
1194 | 0, // small_common_section_flags | |
05a352e6 DK |
1195 | 0, // large_common_section_flags |
1196 | NULL, // attributes_section | |
1197 | NULL // attributes_vendor | |
42cacb20 DE |
1198 | }; |
1199 | ||
1200 | template<> | |
1201 | Target::Target_info Target_powerpc<32, false>::powerpc_info = | |
1202 | { | |
1203 | 32, // size | |
1204 | false, // is_big_endian | |
1205 | elfcpp::EM_PPC, // machine_code | |
1206 | false, // has_make_symbol | |
1207 | false, // has_resolve | |
1208 | false, // has_code_fill | |
1209 | true, // is_default_stack_executable | |
b3ce541e | 1210 | false, // can_icf_inline_merge_sections |
42cacb20 DE |
1211 | '\0', // wrap_char |
1212 | "/usr/lib/ld.so.1", // dynamic_linker | |
1213 | 0x10000000, // default_text_segment_address | |
1214 | 64 * 1024, // abi_pagesize (overridable by -z max-page-size) | |
8a5e3e08 | 1215 | 4 * 1024, // common_pagesize (overridable by -z common-page-size) |
c9269dff AM |
1216 | false, // isolate_execinstr |
1217 | 0, // rosegment_gap | |
8a5e3e08 ILT |
1218 | elfcpp::SHN_UNDEF, // small_common_shndx |
1219 | elfcpp::SHN_UNDEF, // large_common_shndx | |
1220 | 0, // small_common_section_flags | |
05a352e6 DK |
1221 | 0, // large_common_section_flags |
1222 | NULL, // attributes_section | |
1223 | NULL // attributes_vendor | |
42cacb20 DE |
1224 | }; |
1225 | ||
1226 | template<> | |
1227 | Target::Target_info Target_powerpc<64, true>::powerpc_info = | |
1228 | { | |
1229 | 64, // size | |
1230 | true, // is_big_endian | |
1231 | elfcpp::EM_PPC64, // machine_code | |
1232 | false, // has_make_symbol | |
1233 | false, // has_resolve | |
1234 | false, // has_code_fill | |
1235 | true, // is_default_stack_executable | |
b3ce541e | 1236 | false, // can_icf_inline_merge_sections |
42cacb20 DE |
1237 | '\0', // wrap_char |
1238 | "/usr/lib/ld.so.1", // dynamic_linker | |
1239 | 0x10000000, // default_text_segment_address | |
1240 | 64 * 1024, // abi_pagesize (overridable by -z max-page-size) | |
dd93cd0a | 1241 | 4 * 1024, // common_pagesize (overridable by -z common-page-size) |
c9269dff AM |
1242 | false, // isolate_execinstr |
1243 | 0, // rosegment_gap | |
8a5e3e08 ILT |
1244 | elfcpp::SHN_UNDEF, // small_common_shndx |
1245 | elfcpp::SHN_UNDEF, // large_common_shndx | |
1246 | 0, // small_common_section_flags | |
05a352e6 DK |
1247 | 0, // large_common_section_flags |
1248 | NULL, // attributes_section | |
1249 | NULL // attributes_vendor | |
42cacb20 DE |
1250 | }; |
1251 | ||
1252 | template<> | |
1253 | Target::Target_info Target_powerpc<64, false>::powerpc_info = | |
1254 | { | |
1255 | 64, // size | |
1256 | false, // is_big_endian | |
1257 | elfcpp::EM_PPC64, // machine_code | |
1258 | false, // has_make_symbol | |
1259 | false, // has_resolve | |
1260 | false, // has_code_fill | |
1261 | true, // is_default_stack_executable | |
b3ce541e | 1262 | false, // can_icf_inline_merge_sections |
42cacb20 DE |
1263 | '\0', // wrap_char |
1264 | "/usr/lib/ld.so.1", // dynamic_linker | |
1265 | 0x10000000, // default_text_segment_address | |
1266 | 64 * 1024, // abi_pagesize (overridable by -z max-page-size) | |
dd93cd0a | 1267 | 4 * 1024, // common_pagesize (overridable by -z common-page-size) |
c9269dff AM |
1268 | false, // isolate_execinstr |
1269 | 0, // rosegment_gap | |
8a5e3e08 ILT |
1270 | elfcpp::SHN_UNDEF, // small_common_shndx |
1271 | elfcpp::SHN_UNDEF, // large_common_shndx | |
1272 | 0, // small_common_section_flags | |
05a352e6 DK |
1273 | 0, // large_common_section_flags |
1274 | NULL, // attributes_section | |
1275 | NULL // attributes_vendor | |
42cacb20 DE |
1276 | }; |
1277 | ||
dd93cd0a AM |
1278 | inline bool |
1279 | is_branch_reloc(unsigned int r_type) | |
1280 | { | |
1281 | return (r_type == elfcpp::R_POWERPC_REL24 | |
1282 | || r_type == elfcpp::R_PPC_PLTREL24 | |
1283 | || r_type == elfcpp::R_PPC_LOCAL24PC | |
1284 | || r_type == elfcpp::R_POWERPC_REL14 | |
1285 | || r_type == elfcpp::R_POWERPC_REL14_BRTAKEN | |
1286 | || r_type == elfcpp::R_POWERPC_REL14_BRNTAKEN | |
1287 | || r_type == elfcpp::R_POWERPC_ADDR24 | |
1288 | || r_type == elfcpp::R_POWERPC_ADDR14 | |
1289 | || r_type == elfcpp::R_POWERPC_ADDR14_BRTAKEN | |
1290 | || r_type == elfcpp::R_POWERPC_ADDR14_BRNTAKEN); | |
1291 | } | |
1292 | ||
1293 | // If INSN is an opcode that may be used with an @tls operand, return | |
1294 | // the transformed insn for TLS optimisation, otherwise return 0. If | |
1295 | // REG is non-zero only match an insn with RB or RA equal to REG. | |
1296 | uint32_t | |
1297 | at_tls_transform(uint32_t insn, unsigned int reg) | |
1298 | { | |
1299 | if ((insn & (0x3f << 26)) != 31 << 26) | |
1300 | return 0; | |
1301 | ||
1302 | unsigned int rtra; | |
1303 | if (reg == 0 || ((insn >> 11) & 0x1f) == reg) | |
1304 | rtra = insn & ((1 << 26) - (1 << 16)); | |
1305 | else if (((insn >> 16) & 0x1f) == reg) | |
1306 | rtra = (insn & (0x1f << 21)) | ((insn & (0x1f << 11)) << 5); | |
1307 | else | |
1308 | return 0; | |
1309 | ||
1310 | if ((insn & (0x3ff << 1)) == 266 << 1) | |
1311 | // add -> addi | |
1312 | insn = 14 << 26; | |
1313 | else if ((insn & (0x1f << 1)) == 23 << 1 | |
1314 | && ((insn & (0x1f << 6)) < 14 << 6 | |
1315 | || ((insn & (0x1f << 6)) >= 16 << 6 | |
1316 | && (insn & (0x1f << 6)) < 24 << 6))) | |
1317 | // load and store indexed -> dform | |
1318 | insn = (32 | ((insn >> 6) & 0x1f)) << 26; | |
1319 | else if ((insn & (((0x1a << 5) | 0x1f) << 1)) == 21 << 1) | |
1320 | // ldx, ldux, stdx, stdux -> ld, ldu, std, stdu | |
1321 | insn = ((58 | ((insn >> 6) & 4)) << 26) | ((insn >> 6) & 1); | |
1322 | else if ((insn & (((0x1f << 5) | 0x1f) << 1)) == 341 << 1) | |
1323 | // lwax -> lwa | |
1324 | insn = (58 << 26) | 2; | |
1325 | else | |
1326 | return 0; | |
1327 | insn |= rtra; | |
1328 | return insn; | |
1329 | } | |
1330 | ||
1331 | // Modified version of symtab.h class Symbol member | |
1332 | // Given a direct absolute or pc-relative static relocation against | |
1333 | // the global symbol, this function returns whether a dynamic relocation | |
1334 | // is needed. | |
1335 | ||
1336 | template<int size> | |
1337 | bool | |
1338 | needs_dynamic_reloc(const Symbol* gsym, int flags) | |
1339 | { | |
1340 | // No dynamic relocations in a static link! | |
1341 | if (parameters->doing_static_link()) | |
1342 | return false; | |
1343 | ||
1344 | // A reference to an undefined symbol from an executable should be | |
1345 | // statically resolved to 0, and does not need a dynamic relocation. | |
1346 | // This matches gnu ld behavior. | |
1347 | if (gsym->is_undefined() && !parameters->options().shared()) | |
1348 | return false; | |
1349 | ||
1350 | // A reference to an absolute symbol does not need a dynamic relocation. | |
1351 | if (gsym->is_absolute()) | |
1352 | return false; | |
1353 | ||
1354 | // An absolute reference within a position-independent output file | |
1355 | // will need a dynamic relocation. | |
1356 | if ((flags & Symbol::ABSOLUTE_REF) | |
1357 | && parameters->options().output_is_position_independent()) | |
1358 | return true; | |
1359 | ||
1360 | // A function call that can branch to a local PLT entry does not need | |
1361 | // a dynamic relocation. | |
1362 | if ((flags & Symbol::FUNCTION_CALL) && gsym->has_plt_offset()) | |
1363 | return false; | |
1364 | ||
1365 | // A reference to any PLT entry in a non-position-independent executable | |
1366 | // does not need a dynamic relocation. | |
1367 | // Except due to having function descriptors on powerpc64 we don't define | |
1368 | // functions to their plt code in an executable, so this doesn't apply. | |
1369 | if (size == 32 | |
1370 | && !parameters->options().output_is_position_independent() | |
1371 | && gsym->has_plt_offset()) | |
1372 | return false; | |
1373 | ||
1374 | // A reference to a symbol defined in a dynamic object or to a | |
1375 | // symbol that is preemptible will need a dynamic relocation. | |
1376 | if (gsym->is_from_dynobj() | |
1377 | || gsym->is_undefined() | |
1378 | || gsym->is_preemptible()) | |
1379 | return true; | |
1380 | ||
1381 | // For all other cases, return FALSE. | |
1382 | return false; | |
1383 | } | |
1384 | ||
1385 | // Modified version of symtab.h class Symbol member | |
1386 | // Whether we should use the PLT offset associated with a symbol for | |
1387 | // a relocation. FLAGS is a set of Reference_flags. | |
1388 | ||
1389 | template<int size> | |
1390 | bool | |
1391 | use_plt_offset(const Symbol* gsym, int flags) | |
1392 | { | |
1393 | // If the symbol doesn't have a PLT offset, then naturally we | |
1394 | // don't want to use it. | |
1395 | if (!gsym->has_plt_offset()) | |
1396 | return false; | |
1397 | ||
1398 | // For a STT_GNU_IFUNC symbol we always have to use the PLT entry. | |
1399 | if (gsym->type() == elfcpp::STT_GNU_IFUNC) | |
1400 | return true; | |
1401 | ||
1402 | // If we are going to generate a dynamic relocation, then we will | |
1403 | // wind up using that, so no need to use the PLT entry. | |
1404 | if (needs_dynamic_reloc<size>(gsym, flags)) | |
1405 | return false; | |
1406 | ||
1407 | // If the symbol is from a dynamic object, we need to use the PLT | |
1408 | // entry. | |
1409 | if (gsym->is_from_dynobj()) | |
1410 | return true; | |
1411 | ||
9e69ed50 | 1412 | // If we are generating a shared object, and this symbol is |
dd93cd0a AM |
1413 | // undefined or preemptible, we need to use the PLT entry. |
1414 | if (parameters->options().shared() | |
1415 | && (gsym->is_undefined() || gsym->is_preemptible())) | |
1416 | return true; | |
1417 | ||
9e69ed50 | 1418 | // If this is a call to a weak undefined symbol, we need to use |
dd93cd0a AM |
1419 | // the PLT entry; the symbol may be defined by a library loaded |
1420 | // at runtime. | |
1421 | if ((flags & Symbol::FUNCTION_CALL) && gsym->is_weak_undefined()) | |
1422 | return true; | |
1423 | ||
1424 | // Otherwise we can use the regular definition. | |
1425 | return false; | |
1426 | } | |
1427 | ||
42cacb20 DE |
1428 | template<int size, bool big_endian> |
1429 | class Powerpc_relocate_functions | |
1430 | { | |
dd93cd0a | 1431 | public: |
f4baf0d4 | 1432 | enum Overflow_check |
dd93cd0a | 1433 | { |
f4baf0d4 AM |
1434 | CHECK_NONE, |
1435 | CHECK_SIGNED, | |
1436 | CHECK_BITFIELD | |
dd93cd0a AM |
1437 | }; |
1438 | ||
f4baf0d4 | 1439 | enum Status |
dd93cd0a | 1440 | { |
f4baf0d4 AM |
1441 | STATUS_OK, |
1442 | STATUS_OVERFLOW | |
1443 | }; | |
dd93cd0a | 1444 | |
42cacb20 | 1445 | private: |
c9269dff | 1446 | typedef Powerpc_relocate_functions<size, big_endian> This; |
c9269dff AM |
1447 | typedef typename elfcpp::Elf_types<size>::Elf_Addr Address; |
1448 | ||
dd93cd0a AM |
1449 | template<int valsize> |
1450 | static inline bool | |
1451 | has_overflow_signed(Address value) | |
1452 | { | |
1453 | // limit = 1 << (valsize - 1) without shift count exceeding size of type | |
1454 | Address limit = static_cast<Address>(1) << ((valsize - 1) >> 1); | |
1455 | limit <<= ((valsize - 1) >> 1); | |
1456 | limit <<= ((valsize - 1) - 2 * ((valsize - 1) >> 1)); | |
1457 | return value + limit > (limit << 1) - 1; | |
1458 | } | |
1459 | ||
1460 | template<int valsize> | |
1461 | static inline bool | |
1462 | has_overflow_bitfield(Address value) | |
1463 | { | |
1464 | Address limit = static_cast<Address>(1) << ((valsize - 1) >> 1); | |
1465 | limit <<= ((valsize - 1) >> 1); | |
1466 | limit <<= ((valsize - 1) - 2 * ((valsize - 1) >> 1)); | |
1467 | return value > (limit << 1) - 1 && value + limit > (limit << 1) - 1; | |
1468 | } | |
1469 | ||
1470 | template<int valsize> | |
f4baf0d4 AM |
1471 | static inline Status |
1472 | overflowed(Address value, Overflow_check overflow) | |
dd93cd0a | 1473 | { |
f4baf0d4 | 1474 | if (overflow == CHECK_SIGNED) |
dd93cd0a AM |
1475 | { |
1476 | if (has_overflow_signed<valsize>(value)) | |
f4baf0d4 | 1477 | return STATUS_OVERFLOW; |
dd93cd0a | 1478 | } |
f4baf0d4 | 1479 | else if (overflow == CHECK_BITFIELD) |
dd93cd0a AM |
1480 | { |
1481 | if (has_overflow_bitfield<valsize>(value)) | |
f4baf0d4 | 1482 | return STATUS_OVERFLOW; |
dd93cd0a | 1483 | } |
f4baf0d4 | 1484 | return STATUS_OK; |
dd93cd0a AM |
1485 | } |
1486 | ||
cf43a2fe | 1487 | // Do a simple RELA relocation |
42cacb20 | 1488 | template<int valsize> |
f4baf0d4 AM |
1489 | static inline Status |
1490 | rela(unsigned char* view, Address value, Overflow_check overflow) | |
dd93cd0a AM |
1491 | { |
1492 | typedef typename elfcpp::Swap<valsize, big_endian>::Valtype Valtype; | |
1493 | Valtype* wv = reinterpret_cast<Valtype*>(view); | |
1494 | elfcpp::Swap<valsize, big_endian>::writeval(wv, value); | |
1495 | return overflowed<valsize>(value, overflow); | |
1496 | } | |
1497 | ||
1498 | template<int valsize> | |
f4baf0d4 | 1499 | static inline Status |
42cacb20 DE |
1500 | rela(unsigned char* view, |
1501 | unsigned int right_shift, | |
c9269dff AM |
1502 | typename elfcpp::Valtype_base<valsize>::Valtype dst_mask, |
1503 | Address value, | |
f4baf0d4 | 1504 | Overflow_check overflow) |
42cacb20 DE |
1505 | { |
1506 | typedef typename elfcpp::Swap<valsize, big_endian>::Valtype Valtype; | |
1507 | Valtype* wv = reinterpret_cast<Valtype*>(view); | |
1508 | Valtype val = elfcpp::Swap<valsize, big_endian>::readval(wv); | |
dd93cd0a | 1509 | Valtype reloc = value >> right_shift; |
42cacb20 DE |
1510 | val &= ~dst_mask; |
1511 | reloc &= dst_mask; | |
42cacb20 | 1512 | elfcpp::Swap<valsize, big_endian>::writeval(wv, val | reloc); |
dd93cd0a | 1513 | return overflowed<valsize>(value >> right_shift, overflow); |
42cacb20 DE |
1514 | } |
1515 | ||
cf43a2fe | 1516 | // Do a simple RELA relocation, unaligned. |
42cacb20 | 1517 | template<int valsize> |
f4baf0d4 AM |
1518 | static inline Status |
1519 | rela_ua(unsigned char* view, Address value, Overflow_check overflow) | |
dd93cd0a AM |
1520 | { |
1521 | elfcpp::Swap_unaligned<valsize, big_endian>::writeval(view, value); | |
1522 | return overflowed<valsize>(value, overflow); | |
1523 | } | |
1524 | ||
1525 | template<int valsize> | |
f4baf0d4 | 1526 | static inline Status |
cf43a2fe AM |
1527 | rela_ua(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 | 1532 | { |
c9269dff AM |
1533 | typedef typename elfcpp::Swap_unaligned<valsize, big_endian>::Valtype |
1534 | Valtype; | |
dd93cd0a AM |
1535 | Valtype val = elfcpp::Swap<valsize, big_endian>::readval(view); |
1536 | Valtype reloc = value >> right_shift; | |
42cacb20 DE |
1537 | val &= ~dst_mask; |
1538 | reloc &= dst_mask; | |
dd93cd0a AM |
1539 | elfcpp::Swap_unaligned<valsize, big_endian>::writeval(view, val | reloc); |
1540 | return overflowed<valsize>(value >> right_shift, overflow); | |
42cacb20 DE |
1541 | } |
1542 | ||
42cacb20 | 1543 | public: |
dd93cd0a | 1544 | // R_PPC64_ADDR64: (Symbol + Addend) |
42cacb20 | 1545 | static inline void |
dd93cd0a | 1546 | addr64(unsigned char* view, Address value) |
f4baf0d4 | 1547 | { This::template rela<64>(view, value, CHECK_NONE); } |
42cacb20 | 1548 | |
dd93cd0a | 1549 | // R_PPC64_UADDR64: (Symbol + Addend) unaligned |
42cacb20 | 1550 | static inline void |
dd93cd0a | 1551 | addr64_u(unsigned char* view, Address value) |
f4baf0d4 | 1552 | { This::template rela_ua<64>(view, value, CHECK_NONE); } |
dd93cd0a AM |
1553 | |
1554 | // R_POWERPC_ADDR32: (Symbol + Addend) | |
f4baf0d4 AM |
1555 | static inline Status |
1556 | addr32(unsigned char* view, Address value, Overflow_check overflow) | |
dd93cd0a AM |
1557 | { return This::template rela<32>(view, value, overflow); } |
1558 | ||
1559 | // R_POWERPC_UADDR32: (Symbol + Addend) unaligned | |
f4baf0d4 AM |
1560 | static inline Status |
1561 | addr32_u(unsigned char* view, Address value, Overflow_check overflow) | |
dd93cd0a AM |
1562 | { return This::template rela_ua<32>(view, value, overflow); } |
1563 | ||
1564 | // R_POWERPC_ADDR24: (Symbol + Addend) & 0x3fffffc | |
f4baf0d4 AM |
1565 | static inline Status |
1566 | addr24(unsigned char* view, Address value, Overflow_check overflow) | |
dd93cd0a | 1567 | { |
f4baf0d4 AM |
1568 | Status stat = This::template rela<32>(view, 0, 0x03fffffc, value, overflow); |
1569 | if (overflow != CHECK_NONE && (value & 3) != 0) | |
1570 | stat = STATUS_OVERFLOW; | |
dd93cd0a AM |
1571 | return stat; |
1572 | } | |
42cacb20 DE |
1573 | |
1574 | // R_POWERPC_ADDR16: (Symbol + Addend) & 0xffff | |
f4baf0d4 AM |
1575 | static inline Status |
1576 | addr16(unsigned char* view, Address value, Overflow_check overflow) | |
dd93cd0a | 1577 | { return This::template rela<16>(view, value, overflow); } |
42cacb20 | 1578 | |
dd93cd0a | 1579 | // R_POWERPC_ADDR16: (Symbol + Addend) & 0xffff, unaligned |
f4baf0d4 AM |
1580 | static inline Status |
1581 | addr16_u(unsigned char* view, Address value, Overflow_check overflow) | |
dd93cd0a | 1582 | { return This::template rela_ua<16>(view, value, overflow); } |
42cacb20 | 1583 | |
dd93cd0a | 1584 | // R_POWERPC_ADDR16_DS: (Symbol + Addend) & 0xfffc |
f4baf0d4 AM |
1585 | static inline Status |
1586 | addr16_ds(unsigned char* view, Address value, Overflow_check overflow) | |
dd93cd0a | 1587 | { |
f4baf0d4 AM |
1588 | Status stat = This::template rela<16>(view, 0, 0xfffc, value, overflow); |
1589 | if (overflow != CHECK_NONE && (value & 3) != 0) | |
1590 | stat = STATUS_OVERFLOW; | |
dd93cd0a AM |
1591 | return stat; |
1592 | } | |
42cacb20 | 1593 | |
42cacb20 DE |
1594 | // R_POWERPC_ADDR16_HI: ((Symbol + Addend) >> 16) & 0xffff |
1595 | static inline void | |
dd93cd0a | 1596 | addr16_hi(unsigned char* view, Address value) |
f4baf0d4 | 1597 | { This::template rela<16>(view, 16, 0xffff, value, CHECK_NONE); } |
42cacb20 | 1598 | |
c9269dff | 1599 | // R_POWERPC_ADDR16_HA: ((Symbol + Addend + 0x8000) >> 16) & 0xffff |
42cacb20 | 1600 | static inline void |
dd93cd0a AM |
1601 | addr16_ha(unsigned char* view, Address value) |
1602 | { This::addr16_hi(view, value + 0x8000); } | |
42cacb20 | 1603 | |
dd93cd0a | 1604 | // R_POWERPC_ADDR16_HIGHER: ((Symbol + Addend) >> 32) & 0xffff |
42cacb20 | 1605 | static inline void |
dd93cd0a | 1606 | addr16_hi2(unsigned char* view, Address value) |
f4baf0d4 | 1607 | { This::template rela<16>(view, 32, 0xffff, value, CHECK_NONE); } |
42cacb20 | 1608 | |
dd93cd0a | 1609 | // R_POWERPC_ADDR16_HIGHERA: ((Symbol + Addend + 0x8000) >> 32) & 0xffff |
42cacb20 | 1610 | static inline void |
dd93cd0a AM |
1611 | addr16_ha2(unsigned char* view, Address value) |
1612 | { This::addr16_hi2(view, value + 0x8000); } | |
42cacb20 | 1613 | |
dd93cd0a | 1614 | // R_POWERPC_ADDR16_HIGHEST: ((Symbol + Addend) >> 48) & 0xffff |
42cacb20 | 1615 | static inline void |
dd93cd0a | 1616 | addr16_hi3(unsigned char* view, Address value) |
f4baf0d4 | 1617 | { This::template rela<16>(view, 48, 0xffff, value, CHECK_NONE); } |
42cacb20 | 1618 | |
dd93cd0a | 1619 | // R_POWERPC_ADDR16_HIGHESTA: ((Symbol + Addend + 0x8000) >> 48) & 0xffff |
42cacb20 | 1620 | static inline void |
dd93cd0a AM |
1621 | addr16_ha3(unsigned char* view, Address value) |
1622 | { This::addr16_hi3(view, value + 0x8000); } | |
1623 | ||
1624 | // R_POWERPC_ADDR14: (Symbol + Addend) & 0xfffc | |
f4baf0d4 AM |
1625 | static inline Status |
1626 | addr14(unsigned char* view, Address value, Overflow_check overflow) | |
dd93cd0a | 1627 | { |
f4baf0d4 AM |
1628 | Status stat = This::template rela<32>(view, 0, 0xfffc, value, overflow); |
1629 | if (overflow != CHECK_NONE && (value & 3) != 0) | |
1630 | stat = STATUS_OVERFLOW; | |
dd93cd0a AM |
1631 | return stat; |
1632 | } | |
cf43a2fe AM |
1633 | }; |
1634 | ||
c9269dff AM |
1635 | // Stash away the index of .got2 or .opd in a relocatable object, if |
1636 | // such a section exists. | |
cf43a2fe AM |
1637 | |
1638 | template<int size, bool big_endian> | |
1639 | bool | |
1640 | Powerpc_relobj<size, big_endian>::do_find_special_sections( | |
1641 | Read_symbols_data* sd) | |
1642 | { | |
c9269dff AM |
1643 | const unsigned char* const pshdrs = sd->section_headers->data(); |
1644 | const unsigned char* namesu = sd->section_names->data(); | |
1645 | const char* names = reinterpret_cast<const char*>(namesu); | |
1646 | section_size_type names_size = sd->section_names_size; | |
1647 | const unsigned char* s; | |
1648 | ||
dc3714f3 AM |
1649 | s = this->template find_shdr<size, big_endian>(pshdrs, |
1650 | size == 32 ? ".got2" : ".opd", | |
1651 | names, names_size, NULL); | |
c9269dff AM |
1652 | if (s != NULL) |
1653 | { | |
1654 | unsigned int ndx = (s - pshdrs) / elfcpp::Elf_sizes<size>::shdr_size; | |
1655 | this->special_ = ndx; | |
1656 | } | |
1657 | return Sized_relobj_file<size, big_endian>::do_find_special_sections(sd); | |
1658 | } | |
1659 | ||
1660 | // Examine .rela.opd to build info about function entry points. | |
1661 | ||
1662 | template<int size, bool big_endian> | |
1663 | void | |
1664 | Powerpc_relobj<size, big_endian>::scan_opd_relocs( | |
1665 | size_t reloc_count, | |
1666 | const unsigned char* prelocs, | |
1667 | const unsigned char* plocal_syms) | |
1668 | { | |
1669 | if (size == 64) | |
cf43a2fe | 1670 | { |
c9269dff AM |
1671 | typedef typename Reloc_types<elfcpp::SHT_RELA, size, big_endian>::Reloc |
1672 | Reltype; | |
1673 | const int reloc_size | |
1674 | = Reloc_types<elfcpp::SHT_RELA, size, big_endian>::reloc_size; | |
1675 | const int sym_size = elfcpp::Elf_sizes<size>::sym_size; | |
ec4dbad3 AM |
1676 | Address expected_off = 0; |
1677 | bool regular = true; | |
1678 | unsigned int opd_ent_size = 0; | |
c9269dff AM |
1679 | |
1680 | for (size_t i = 0; i < reloc_count; ++i, prelocs += reloc_size) | |
cf43a2fe | 1681 | { |
c9269dff AM |
1682 | Reltype reloc(prelocs); |
1683 | typename elfcpp::Elf_types<size>::Elf_WXword r_info | |
1684 | = reloc.get_r_info(); | |
1685 | unsigned int r_type = elfcpp::elf_r_type<size>(r_info); | |
1686 | if (r_type == elfcpp::R_PPC64_ADDR64) | |
1687 | { | |
1688 | unsigned int r_sym = elfcpp::elf_r_sym<size>(r_info); | |
1689 | typename elfcpp::Elf_types<size>::Elf_Addr value; | |
1690 | bool is_ordinary; | |
1691 | unsigned int shndx; | |
1692 | if (r_sym < this->local_symbol_count()) | |
1693 | { | |
1694 | typename elfcpp::Sym<size, big_endian> | |
1695 | lsym(plocal_syms + r_sym * sym_size); | |
1696 | shndx = lsym.get_st_shndx(); | |
1697 | shndx = this->adjust_sym_shndx(r_sym, shndx, &is_ordinary); | |
1698 | value = lsym.get_st_value(); | |
1699 | } | |
1700 | else | |
1701 | shndx = this->symbol_section_and_value(r_sym, &value, | |
1702 | &is_ordinary); | |
1703 | this->set_opd_ent(reloc.get_r_offset(), shndx, | |
1704 | value + reloc.get_r_addend()); | |
ec4dbad3 AM |
1705 | if (i == 2) |
1706 | { | |
1707 | expected_off = reloc.get_r_offset(); | |
1708 | opd_ent_size = expected_off; | |
1709 | } | |
1710 | else if (expected_off != reloc.get_r_offset()) | |
1711 | regular = false; | |
1712 | expected_off += opd_ent_size; | |
1713 | } | |
1714 | else if (r_type == elfcpp::R_PPC64_TOC) | |
1715 | { | |
1716 | if (expected_off - opd_ent_size + 8 != reloc.get_r_offset()) | |
1717 | regular = false; | |
1718 | } | |
1719 | else | |
1720 | { | |
1721 | gold_warning(_("%s: unexpected reloc type %u in .opd section"), | |
1722 | this->name().c_str(), r_type); | |
1723 | regular = false; | |
c9269dff AM |
1724 | } |
1725 | } | |
ec4dbad3 AM |
1726 | if (reloc_count <= 2) |
1727 | opd_ent_size = this->section_size(this->opd_shndx()); | |
1728 | if (opd_ent_size != 24 && opd_ent_size != 16) | |
1729 | regular = false; | |
1730 | if (!regular) | |
1731 | { | |
1732 | gold_warning(_("%s: .opd is not a regular array of opd entries"), | |
1733 | this->name().c_str()); | |
1734 | opd_ent_size = 0; | |
1735 | } | |
c9269dff AM |
1736 | } |
1737 | } | |
1738 | ||
1739 | template<int size, bool big_endian> | |
1740 | void | |
1741 | Powerpc_relobj<size, big_endian>::do_read_relocs(Read_relocs_data* rd) | |
1742 | { | |
1743 | Sized_relobj_file<size, big_endian>::do_read_relocs(rd); | |
1744 | if (size == 64) | |
1745 | { | |
1746 | for (Read_relocs_data::Relocs_list::iterator p = rd->relocs.begin(); | |
1747 | p != rd->relocs.end(); | |
1748 | ++p) | |
1749 | { | |
1750 | if (p->data_shndx == this->opd_shndx()) | |
1751 | { | |
ec4dbad3 AM |
1752 | uint64_t opd_size = this->section_size(this->opd_shndx()); |
1753 | gold_assert(opd_size == static_cast<size_t>(opd_size)); | |
1754 | if (opd_size != 0) | |
1755 | { | |
1756 | this->init_opd(opd_size); | |
1757 | this->scan_opd_relocs(p->reloc_count, p->contents->data(), | |
1758 | rd->local_symbols->data()); | |
1759 | } | |
c9269dff AM |
1760 | break; |
1761 | } | |
cf43a2fe AM |
1762 | } |
1763 | } | |
cf43a2fe AM |
1764 | } |
1765 | ||
dc3714f3 AM |
1766 | // Call Sized_dynobj::do_read_symbols to read the symbols then |
1767 | // read .opd from a dynamic object, filling in opd_ent_ vector, | |
1768 | ||
1769 | template<int size, bool big_endian> | |
1770 | void | |
1771 | Powerpc_dynobj<size, big_endian>::do_read_symbols(Read_symbols_data* sd) | |
1772 | { | |
1773 | Sized_dynobj<size, big_endian>::do_read_symbols(sd); | |
1774 | if (size == 64) | |
1775 | { | |
1776 | const int shdr_size = elfcpp::Elf_sizes<size>::shdr_size; | |
1777 | const unsigned char* const pshdrs = sd->section_headers->data(); | |
1778 | const unsigned char* namesu = sd->section_names->data(); | |
1779 | const char* names = reinterpret_cast<const char*>(namesu); | |
1780 | const unsigned char* s = NULL; | |
1781 | const unsigned char* opd; | |
1782 | section_size_type opd_size; | |
1783 | ||
1784 | // Find and read .opd section. | |
1785 | while (1) | |
1786 | { | |
1787 | s = this->template find_shdr<size, big_endian>(pshdrs, ".opd", names, | |
1788 | sd->section_names_size, | |
1789 | s); | |
1790 | if (s == NULL) | |
1791 | return; | |
1792 | ||
1793 | typename elfcpp::Shdr<size, big_endian> shdr(s); | |
1794 | if (shdr.get_sh_type() == elfcpp::SHT_PROGBITS | |
1795 | && (shdr.get_sh_flags() & elfcpp::SHF_ALLOC) != 0) | |
1796 | { | |
1797 | this->opd_shndx_ = (s - pshdrs) / shdr_size; | |
1798 | this->opd_address_ = shdr.get_sh_addr(); | |
1799 | opd_size = convert_to_section_size_type(shdr.get_sh_size()); | |
1800 | opd = this->get_view(shdr.get_sh_offset(), opd_size, | |
1801 | true, false); | |
1802 | break; | |
1803 | } | |
1804 | } | |
1805 | ||
1806 | // Build set of executable sections. | |
1807 | // Using a set is probably overkill. There is likely to be only | |
1808 | // a few executable sections, typically .init, .text and .fini, | |
1809 | // and they are generally grouped together. | |
1810 | typedef std::set<Sec_info> Exec_sections; | |
1811 | Exec_sections exec_sections; | |
1812 | s = pshdrs; | |
1813 | for (unsigned int i = 1; i < this->shnum(); ++i, s += shdr_size) | |
1814 | { | |
1815 | typename elfcpp::Shdr<size, big_endian> shdr(s); | |
1816 | if (shdr.get_sh_type() == elfcpp::SHT_PROGBITS | |
1817 | && ((shdr.get_sh_flags() | |
1818 | & (elfcpp::SHF_ALLOC | elfcpp::SHF_EXECINSTR)) | |
1819 | == (elfcpp::SHF_ALLOC | elfcpp::SHF_EXECINSTR)) | |
1820 | && shdr.get_sh_size() != 0) | |
1821 | { | |
1822 | exec_sections.insert(Sec_info(shdr.get_sh_addr(), | |
1823 | shdr.get_sh_size(), i)); | |
1824 | } | |
1825 | } | |
1826 | if (exec_sections.empty()) | |
1827 | return; | |
1828 | ||
1829 | // Look over the OPD entries. This is complicated by the fact | |
1830 | // that some binaries will use two-word entries while others | |
1831 | // will use the standard three-word entries. In most cases | |
1832 | // the third word (the environment pointer for languages like | |
1833 | // Pascal) is unused and will be zero. If the third word is | |
1834 | // used it should not be pointing into executable sections, | |
1835 | // I think. | |
1836 | this->init_opd(opd_size); | |
1837 | for (const unsigned char* p = opd; p < opd + opd_size; p += 8) | |
1838 | { | |
1839 | typedef typename elfcpp::Swap<64, big_endian>::Valtype Valtype; | |
1840 | const Valtype* valp = reinterpret_cast<const Valtype*>(p); | |
1841 | Valtype val = elfcpp::Swap<64, big_endian>::readval(valp); | |
1842 | if (val == 0) | |
1843 | // Chances are that this is the third word of an OPD entry. | |
1844 | continue; | |
1845 | typename Exec_sections::const_iterator e | |
1846 | = exec_sections.upper_bound(Sec_info(val, 0, 0)); | |
1847 | if (e != exec_sections.begin()) | |
1848 | { | |
1849 | --e; | |
1850 | if (e->start <= val && val < e->start + e->len) | |
1851 | { | |
1852 | // We have an address in an executable section. | |
1853 | // VAL ought to be the function entry, set it up. | |
1854 | this->set_opd_ent(p - opd, e->shndx, val); | |
1855 | // Skip second word of OPD entry, the TOC pointer. | |
1856 | p += 8; | |
1857 | } | |
1858 | } | |
1859 | // If we didn't match any executable sections, we likely | |
1860 | // have a non-zero third word in the OPD entry. | |
1861 | } | |
1862 | } | |
1863 | } | |
1864 | ||
f43ba157 | 1865 | // Set up some symbols. |
26a4e9cb AM |
1866 | |
1867 | template<int size, bool big_endian> | |
1868 | void | |
f43ba157 AM |
1869 | Target_powerpc<size, big_endian>::do_define_standard_symbols( |
1870 | Symbol_table* symtab, | |
1871 | Layout* layout) | |
26a4e9cb AM |
1872 | { |
1873 | if (size == 32) | |
1874 | { | |
bb66a627 AM |
1875 | // Define _GLOBAL_OFFSET_TABLE_ to ensure it isn't seen as |
1876 | // undefined when scanning relocs (and thus requires | |
26a4e9cb AM |
1877 | // non-relative dynamic relocs). The proper value will be |
1878 | // updated later. | |
1879 | Symbol *gotsym = symtab->lookup("_GLOBAL_OFFSET_TABLE_", NULL); | |
1880 | if (gotsym != NULL && gotsym->is_undefined()) | |
1881 | { | |
1882 | Target_powerpc<size, big_endian>* target = | |
1883 | static_cast<Target_powerpc<size, big_endian>*>( | |
1884 | parameters->sized_target<size, big_endian>()); | |
1885 | Output_data_got_powerpc<size, big_endian>* got | |
1886 | = target->got_section(symtab, layout); | |
1887 | symtab->define_in_output_data("_GLOBAL_OFFSET_TABLE_", NULL, | |
1888 | Symbol_table::PREDEFINED, | |
1889 | got, 0, 0, | |
1890 | elfcpp::STT_OBJECT, | |
bb66a627 | 1891 | elfcpp::STB_LOCAL, |
26a4e9cb AM |
1892 | elfcpp::STV_HIDDEN, 0, |
1893 | false, false); | |
1894 | } | |
1895 | ||
1896 | // Define _SDA_BASE_ at the start of the .sdata section + 32768. | |
1897 | Symbol *sdasym = symtab->lookup("_SDA_BASE_", NULL); | |
1898 | if (sdasym != NULL && sdasym->is_undefined()) | |
1899 | { | |
1900 | Output_data_space* sdata = new Output_data_space(4, "** sdata"); | |
1901 | Output_section* os | |
1902 | = layout->add_output_section_data(".sdata", 0, | |
1903 | elfcpp::SHF_ALLOC | |
1904 | | elfcpp::SHF_WRITE, | |
1905 | sdata, ORDER_SMALL_DATA, false); | |
1906 | symtab->define_in_output_data("_SDA_BASE_", NULL, | |
1907 | Symbol_table::PREDEFINED, | |
1908 | os, 32768, 0, elfcpp::STT_OBJECT, | |
1909 | elfcpp::STB_LOCAL, elfcpp::STV_HIDDEN, | |
1910 | 0, false, false); | |
1911 | } | |
1912 | } | |
26a4e9cb AM |
1913 | } |
1914 | ||
cf43a2fe AM |
1915 | // Set up PowerPC target specific relobj. |
1916 | ||
1917 | template<int size, bool big_endian> | |
1918 | Object* | |
1919 | Target_powerpc<size, big_endian>::do_make_elf_object( | |
1920 | const std::string& name, | |
1921 | Input_file* input_file, | |
1922 | off_t offset, const elfcpp::Ehdr<size, big_endian>& ehdr) | |
1923 | { | |
1924 | int et = ehdr.get_e_type(); | |
957564c9 AS |
1925 | // ET_EXEC files are valid input for --just-symbols/-R, |
1926 | // and we treat them as relocatable objects. | |
1927 | if (et == elfcpp::ET_REL | |
1928 | || (et == elfcpp::ET_EXEC && input_file->just_symbols())) | |
cf43a2fe AM |
1929 | { |
1930 | Powerpc_relobj<size, big_endian>* obj = | |
c9269dff | 1931 | new Powerpc_relobj<size, big_endian>(name, input_file, offset, ehdr); |
cf43a2fe AM |
1932 | obj->setup(); |
1933 | return obj; | |
1934 | } | |
1935 | else if (et == elfcpp::ET_DYN) | |
1936 | { | |
dc3714f3 AM |
1937 | Powerpc_dynobj<size, big_endian>* obj = |
1938 | new Powerpc_dynobj<size, big_endian>(name, input_file, offset, ehdr); | |
cf43a2fe AM |
1939 | obj->setup(); |
1940 | return obj; | |
1941 | } | |
1942 | else | |
1943 | { | |
c9269dff | 1944 | gold_error(_("%s: unsupported ELF file type %d"), name.c_str(), et); |
cf43a2fe AM |
1945 | return NULL; |
1946 | } | |
1947 | } | |
1948 | ||
1949 | template<int size, bool big_endian> | |
1950 | class Output_data_got_powerpc : public Output_data_got<size, big_endian> | |
1951 | { | |
1952 | public: | |
1953 | typedef typename elfcpp::Elf_types<size>::Elf_Addr Valtype; | |
1954 | typedef Output_data_reloc<elfcpp::SHT_RELA, true, size, big_endian> Rela_dyn; | |
1955 | ||
1956 | Output_data_got_powerpc(Symbol_table* symtab, Layout* layout) | |
1957 | : Output_data_got<size, big_endian>(), | |
1958 | symtab_(symtab), layout_(layout), | |
1959 | header_ent_cnt_(size == 32 ? 3 : 1), | |
1960 | header_index_(size == 32 ? 0x2000 : 0) | |
9e69ed50 | 1961 | { } |
cf43a2fe AM |
1962 | |
1963 | class Got_entry; | |
1964 | ||
1965 | // Create a new GOT entry and return its offset. | |
1966 | unsigned int | |
1967 | add_got_entry(Got_entry got_entry) | |
42cacb20 | 1968 | { |
cf43a2fe AM |
1969 | this->reserve_ent(); |
1970 | return Output_data_got<size, big_endian>::add_got_entry(got_entry); | |
1971 | } | |
42cacb20 | 1972 | |
cf43a2fe AM |
1973 | // Create a pair of new GOT entries and return the offset of the first. |
1974 | unsigned int | |
1975 | add_got_entry_pair(Got_entry got_entry_1, Got_entry got_entry_2) | |
1976 | { | |
1977 | this->reserve_ent(2); | |
1978 | return Output_data_got<size, big_endian>::add_got_entry_pair(got_entry_1, | |
1979 | got_entry_2); | |
1980 | } | |
42cacb20 | 1981 | |
dd93cd0a AM |
1982 | unsigned int |
1983 | add_constant_pair(Valtype c1, Valtype c2) | |
1984 | { | |
1985 | this->reserve_ent(2); | |
1986 | unsigned int got_offset = this->add_constant(c1); | |
1987 | this->add_constant(c2); | |
1988 | return got_offset; | |
1989 | } | |
1990 | ||
1991 | // Offset of _GLOBAL_OFFSET_TABLE_. | |
cf43a2fe AM |
1992 | unsigned int |
1993 | g_o_t() const | |
1994 | { | |
1995 | return this->got_offset(this->header_index_); | |
42cacb20 | 1996 | } |
cf43a2fe | 1997 | |
dd93cd0a AM |
1998 | // Offset of base used to access the GOT/TOC. |
1999 | // The got/toc pointer reg will be set to this value. | |
26a4e9cb | 2000 | Valtype |
dd93cd0a AM |
2001 | got_base_offset(const Powerpc_relobj<size, big_endian>* object) const |
2002 | { | |
2003 | if (size == 32) | |
2004 | return this->g_o_t(); | |
2005 | else | |
2006 | return (this->output_section()->address() | |
2007 | + object->toc_base_offset() | |
2008 | - this->address()); | |
2009 | } | |
2010 | ||
cf43a2fe AM |
2011 | // Ensure our GOT has a header. |
2012 | void | |
2013 | set_final_data_size() | |
2014 | { | |
2015 | if (this->header_ent_cnt_ != 0) | |
2016 | this->make_header(); | |
2017 | Output_data_got<size, big_endian>::set_final_data_size(); | |
2018 | } | |
2019 | ||
2020 | // First word of GOT header needs some values that are not | |
2021 | // handled by Output_data_got so poke them in here. | |
2022 | // For 32-bit, address of .dynamic, for 64-bit, address of TOCbase. | |
2023 | void | |
2024 | do_write(Output_file* of) | |
2025 | { | |
c9824451 AM |
2026 | Valtype val = 0; |
2027 | if (size == 32 && this->layout_->dynamic_data() != NULL) | |
2028 | val = this->layout_->dynamic_section()->address(); | |
2029 | if (size == 64) | |
2030 | val = this->output_section()->address() + 0x8000; | |
2031 | this->replace_constant(this->header_index_, val); | |
cf43a2fe AM |
2032 | Output_data_got<size, big_endian>::do_write(of); |
2033 | } | |
2034 | ||
2035 | private: | |
2036 | void | |
2037 | reserve_ent(unsigned int cnt = 1) | |
2038 | { | |
2039 | if (this->header_ent_cnt_ == 0) | |
2040 | return; | |
2041 | if (this->num_entries() + cnt > this->header_index_) | |
2042 | this->make_header(); | |
2043 | } | |
2044 | ||
2045 | void | |
2046 | make_header() | |
2047 | { | |
2048 | this->header_ent_cnt_ = 0; | |
2049 | this->header_index_ = this->num_entries(); | |
2050 | if (size == 32) | |
2051 | { | |
2052 | Output_data_got<size, big_endian>::add_constant(0); | |
2053 | Output_data_got<size, big_endian>::add_constant(0); | |
2054 | Output_data_got<size, big_endian>::add_constant(0); | |
2055 | ||
2056 | // Define _GLOBAL_OFFSET_TABLE_ at the header | |
bb66a627 AM |
2057 | Symbol *gotsym = this->symtab_->lookup("_GLOBAL_OFFSET_TABLE_", NULL); |
2058 | if (gotsym != NULL) | |
2059 | { | |
2060 | Sized_symbol<size>* sym = static_cast<Sized_symbol<size>*>(gotsym); | |
2061 | sym->set_value(this->g_o_t()); | |
2062 | } | |
2063 | else | |
2064 | this->symtab_->define_in_output_data("_GLOBAL_OFFSET_TABLE_", NULL, | |
2065 | Symbol_table::PREDEFINED, | |
2066 | this, this->g_o_t(), 0, | |
2067 | elfcpp::STT_OBJECT, | |
2068 | elfcpp::STB_LOCAL, | |
2069 | elfcpp::STV_HIDDEN, 0, | |
2070 | false, false); | |
cf43a2fe AM |
2071 | } |
2072 | else | |
2073 | Output_data_got<size, big_endian>::add_constant(0); | |
2074 | } | |
2075 | ||
2076 | // Stashed pointers. | |
2077 | Symbol_table* symtab_; | |
2078 | Layout* layout_; | |
2079 | ||
2080 | // GOT header size. | |
2081 | unsigned int header_ent_cnt_; | |
2082 | // GOT header index. | |
2083 | unsigned int header_index_; | |
42cacb20 DE |
2084 | }; |
2085 | ||
2086 | // Get the GOT section, creating it if necessary. | |
2087 | ||
2088 | template<int size, bool big_endian> | |
cf43a2fe | 2089 | Output_data_got_powerpc<size, big_endian>* |
42cacb20 DE |
2090 | Target_powerpc<size, big_endian>::got_section(Symbol_table* symtab, |
2091 | Layout* layout) | |
2092 | { | |
2093 | if (this->got_ == NULL) | |
2094 | { | |
2095 | gold_assert(symtab != NULL && layout != NULL); | |
2096 | ||
cf43a2fe AM |
2097 | this->got_ |
2098 | = new Output_data_got_powerpc<size, big_endian>(symtab, layout); | |
42cacb20 DE |
2099 | |
2100 | layout->add_output_section_data(".got", elfcpp::SHT_PROGBITS, | |
2101 | elfcpp::SHF_ALLOC | elfcpp::SHF_WRITE, | |
22f0da72 | 2102 | this->got_, ORDER_DATA, false); |
42cacb20 DE |
2103 | } |
2104 | ||
2105 | return this->got_; | |
2106 | } | |
2107 | ||
2108 | // Get the dynamic reloc section, creating it if necessary. | |
2109 | ||
2110 | template<int size, bool big_endian> | |
2111 | typename Target_powerpc<size, big_endian>::Reloc_section* | |
2112 | Target_powerpc<size, big_endian>::rela_dyn_section(Layout* layout) | |
2113 | { | |
2114 | if (this->rela_dyn_ == NULL) | |
2115 | { | |
2116 | gold_assert(layout != NULL); | |
2117 | this->rela_dyn_ = new Reloc_section(parameters->options().combreloc()); | |
2118 | layout->add_output_section_data(".rela.dyn", elfcpp::SHT_RELA, | |
22f0da72 ILT |
2119 | elfcpp::SHF_ALLOC, this->rela_dyn_, |
2120 | ORDER_DYNAMIC_RELOCS, false); | |
42cacb20 DE |
2121 | } |
2122 | return this->rela_dyn_; | |
2123 | } | |
2124 | ||
ec661b9d AM |
2125 | class Stub_control |
2126 | { | |
2127 | public: | |
2128 | // Determine the stub group size. The group size is the absolute | |
2129 | // value of the parameter --stub-group-size. If --stub-group-size | |
2130 | // is passed a negative value, we restrict stubs to be always before | |
2131 | // the stubbed branches. | |
2132 | Stub_control(int32_t size) | |
2133 | : state_(NO_GROUP), stub_group_size_(abs(size)), | |
2134 | stub14_group_size_(abs(size)), | |
2135 | stubs_always_before_branch_(size < 0), suppress_size_errors_(false), | |
2136 | group_end_addr_(0), owner_(NULL), output_section_(NULL) | |
2137 | { | |
2138 | if (stub_group_size_ == 1) | |
2139 | { | |
2140 | // Default values. | |
2141 | if (stubs_always_before_branch_) | |
2142 | { | |
2143 | stub_group_size_ = 0x1e00000; | |
2144 | stub14_group_size_ = 0x7800; | |
2145 | } | |
2146 | else | |
2147 | { | |
2148 | stub_group_size_ = 0x1c00000; | |
2149 | stub14_group_size_ = 0x7000; | |
2150 | } | |
2151 | suppress_size_errors_ = true; | |
2152 | } | |
2153 | } | |
2154 | ||
2155 | // Return true iff input section can be handled by current stub | |
2156 | // group. | |
2157 | bool | |
2158 | can_add_to_stub_group(Output_section* o, | |
2159 | const Output_section::Input_section* i, | |
2160 | bool has14); | |
2161 | ||
2162 | const Output_section::Input_section* | |
2163 | owner() | |
2164 | { return owner_; } | |
2165 | ||
2166 | Output_section* | |
2167 | output_section() | |
2168 | { return output_section_; } | |
2169 | ||
2170 | private: | |
2171 | typedef enum | |
2172 | { | |
2173 | NO_GROUP, | |
2174 | FINDING_STUB_SECTION, | |
2175 | HAS_STUB_SECTION | |
2176 | } State; | |
2177 | ||
2178 | State state_; | |
2179 | uint32_t stub_group_size_; | |
2180 | uint32_t stub14_group_size_; | |
2181 | bool stubs_always_before_branch_; | |
2182 | bool suppress_size_errors_; | |
2183 | uint64_t group_end_addr_; | |
2184 | const Output_section::Input_section* owner_; | |
2185 | Output_section* output_section_; | |
2186 | }; | |
2187 | ||
2188 | // Return true iff input section can be handled by current stub/ | |
2189 | // group. | |
2190 | ||
2191 | bool | |
2192 | Stub_control::can_add_to_stub_group(Output_section* o, | |
2193 | const Output_section::Input_section* i, | |
2194 | bool has14) | |
2195 | { | |
2196 | uint32_t group_size | |
2197 | = has14 ? this->stub14_group_size_ : this->stub_group_size_; | |
2198 | bool whole_sec = o->order() == ORDER_INIT || o->order() == ORDER_FINI; | |
2199 | uint64_t this_size; | |
2200 | uint64_t start_addr = o->address(); | |
2201 | ||
2202 | if (whole_sec) | |
2203 | // .init and .fini sections are pasted together to form a single | |
2204 | // function. We can't be adding stubs in the middle of the function. | |
2205 | this_size = o->data_size(); | |
2206 | else | |
2207 | { | |
2208 | start_addr += i->relobj()->output_section_offset(i->shndx()); | |
2209 | this_size = i->data_size(); | |
2210 | } | |
2211 | uint64_t end_addr = start_addr + this_size; | |
2212 | bool toobig = this_size > group_size; | |
2213 | ||
2214 | if (toobig && !this->suppress_size_errors_) | |
2215 | gold_warning(_("%s:%s exceeds group size"), | |
2216 | i->relobj()->name().c_str(), | |
2217 | i->relobj()->section_name(i->shndx()).c_str()); | |
2218 | ||
2219 | if (this->state_ != HAS_STUB_SECTION | |
2220 | && (!whole_sec || this->output_section_ != o)) | |
2221 | { | |
2222 | this->owner_ = i; | |
2223 | this->output_section_ = o; | |
2224 | } | |
2225 | ||
2226 | if (this->state_ == NO_GROUP) | |
2227 | { | |
2228 | this->state_ = FINDING_STUB_SECTION; | |
2229 | this->group_end_addr_ = end_addr; | |
2230 | } | |
2231 | else if (this->group_end_addr_ - start_addr < group_size) | |
2232 | ; | |
2233 | // Adding this section would make the group larger than GROUP_SIZE. | |
2234 | else if (this->state_ == FINDING_STUB_SECTION | |
2235 | && !this->stubs_always_before_branch_ | |
2236 | && !toobig) | |
2237 | { | |
2238 | // But wait, there's more! Input sections up to GROUP_SIZE | |
2239 | // bytes before the stub table can be handled by it too. | |
2240 | this->state_ = HAS_STUB_SECTION; | |
2241 | this->group_end_addr_ = end_addr; | |
2242 | } | |
2243 | else | |
2244 | { | |
2245 | this->state_ = NO_GROUP; | |
2246 | return false; | |
2247 | } | |
2248 | return true; | |
2249 | } | |
2250 | ||
2251 | // Look over all the input sections, deciding where to place stubs. | |
2252 | ||
2253 | template<int size, bool big_endian> | |
2254 | void | |
2255 | Target_powerpc<size, big_endian>::group_sections(Layout* layout, | |
2256 | const Task*) | |
2257 | { | |
2258 | Stub_control stub_control(parameters->options().stub_group_size()); | |
2259 | ||
2260 | // Group input sections and insert stub table | |
2261 | Stub_table<size, big_endian>* stub_table = NULL; | |
2262 | Layout::Section_list section_list; | |
2263 | layout->get_executable_sections(§ion_list); | |
2264 | std::stable_sort(section_list.begin(), section_list.end(), Sort_sections()); | |
2265 | for (Layout::Section_list::reverse_iterator o = section_list.rbegin(); | |
2266 | o != section_list.rend(); | |
2267 | ++o) | |
2268 | { | |
2269 | typedef Output_section::Input_section_list Input_section_list; | |
2270 | for (Input_section_list::const_reverse_iterator i | |
2271 | = (*o)->input_sections().rbegin(); | |
2272 | i != (*o)->input_sections().rend(); | |
2273 | ++i) | |
2274 | { | |
2275 | if (i->is_input_section()) | |
2276 | { | |
2277 | Powerpc_relobj<size, big_endian>* ppcobj = static_cast | |
2278 | <Powerpc_relobj<size, big_endian>*>(i->relobj()); | |
2279 | bool has14 = ppcobj->has_14bit_branch(i->shndx()); | |
2280 | if (!stub_control.can_add_to_stub_group(*o, &*i, has14)) | |
2281 | { | |
2282 | stub_table->init(stub_control.owner(), | |
2283 | stub_control.output_section()); | |
2284 | stub_table = NULL; | |
2285 | } | |
2286 | if (stub_table == NULL) | |
2287 | stub_table = this->new_stub_table(); | |
2288 | ppcobj->set_stub_table(i->shndx(), stub_table); | |
2289 | } | |
2290 | } | |
2291 | } | |
2292 | if (stub_table != NULL) | |
2293 | stub_table->init(stub_control.owner(), stub_control.output_section()); | |
2294 | } | |
2295 | ||
2296 | // If this branch needs a plt call stub, or a long branch stub, make one. | |
2297 | ||
2298 | template<int size, bool big_endian> | |
2299 | void | |
2300 | Target_powerpc<size, big_endian>::Branch_info::make_stub( | |
2301 | Stub_table<size, big_endian>* stub_table, | |
2302 | Stub_table<size, big_endian>* ifunc_stub_table, | |
2303 | Symbol_table* symtab) const | |
2304 | { | |
2305 | Symbol* sym = this->object_->global_symbol(this->r_sym_); | |
2306 | if (sym != NULL && sym->is_forwarder()) | |
2307 | sym = symtab->resolve_forwards(sym); | |
2308 | const Sized_symbol<size>* gsym = static_cast<const Sized_symbol<size>*>(sym); | |
2309 | if (gsym != NULL | |
2310 | ? use_plt_offset<size>(gsym, Scan::get_reference_flags(this->r_type_)) | |
2311 | : this->object_->local_has_plt_offset(this->r_sym_)) | |
2312 | { | |
2313 | if (stub_table == NULL) | |
2314 | stub_table = this->object_->stub_table(this->shndx_); | |
2315 | if (stub_table == NULL) | |
2316 | { | |
2317 | // This is a ref from a data section to an ifunc symbol. | |
2318 | stub_table = ifunc_stub_table; | |
2319 | } | |
2320 | gold_assert(stub_table != NULL); | |
2321 | if (gsym != NULL) | |
2322 | stub_table->add_plt_call_entry(this->object_, gsym, | |
2323 | this->r_type_, this->addend_); | |
2324 | else | |
2325 | stub_table->add_plt_call_entry(this->object_, this->r_sym_, | |
2326 | this->r_type_, this->addend_); | |
2327 | } | |
2328 | else | |
2329 | { | |
2330 | unsigned int max_branch_offset; | |
2331 | if (this->r_type_ == elfcpp::R_POWERPC_REL14 | |
2332 | || this->r_type_ == elfcpp::R_POWERPC_REL14_BRTAKEN | |
2333 | || this->r_type_ == elfcpp::R_POWERPC_REL14_BRNTAKEN) | |
2334 | max_branch_offset = 1 << 15; | |
2335 | else if (this->r_type_ == elfcpp::R_POWERPC_REL24 | |
2336 | || this->r_type_ == elfcpp::R_PPC_PLTREL24 | |
2337 | || this->r_type_ == elfcpp::R_PPC_LOCAL24PC) | |
2338 | max_branch_offset = 1 << 25; | |
2339 | else | |
2340 | return; | |
2341 | Address from = this->object_->get_output_section_offset(this->shndx_); | |
2342 | gold_assert(from != invalid_address); | |
2343 | from += (this->object_->output_section(this->shndx_)->address() | |
2344 | + this->offset_); | |
2345 | Address to; | |
2346 | if (gsym != NULL) | |
2347 | { | |
2348 | switch (gsym->source()) | |
2349 | { | |
2350 | case Symbol::FROM_OBJECT: | |
2351 | { | |
2352 | Object* symobj = gsym->object(); | |
2353 | if (symobj->is_dynamic() | |
2354 | || symobj->pluginobj() != NULL) | |
2355 | return; | |
2356 | bool is_ordinary; | |
2357 | unsigned int shndx = gsym->shndx(&is_ordinary); | |
2358 | if (shndx == elfcpp::SHN_UNDEF) | |
2359 | return; | |
2360 | } | |
2361 | break; | |
2362 | ||
2363 | case Symbol::IS_UNDEFINED: | |
2364 | return; | |
2365 | ||
2366 | default: | |
2367 | break; | |
2368 | } | |
2369 | Symbol_table::Compute_final_value_status status; | |
2370 | to = symtab->compute_final_value<size>(gsym, &status); | |
2371 | if (status != Symbol_table::CFVS_OK) | |
2372 | return; | |
2373 | } | |
2374 | else | |
2375 | { | |
2376 | const Symbol_value<size>* psymval | |
2377 | = this->object_->local_symbol(this->r_sym_); | |
2378 | Symbol_value<size> symval; | |
2379 | typedef Sized_relobj_file<size, big_endian> ObjType; | |
2380 | typename ObjType::Compute_final_local_value_status status | |
2381 | = this->object_->compute_final_local_value(this->r_sym_, psymval, | |
2382 | &symval, symtab); | |
2383 | if (status != ObjType::CFLV_OK | |
2384 | || !symval.has_output_value()) | |
2385 | return; | |
2386 | to = symval.value(this->object_, 0); | |
2387 | } | |
906b9150 | 2388 | to += this->addend_; |
ec661b9d AM |
2389 | if (stub_table == NULL) |
2390 | stub_table = this->object_->stub_table(this->shndx_); | |
2391 | gold_assert(stub_table != NULL); | |
2392 | if (size == 64 && is_branch_reloc(this->r_type_)) | |
2393 | { | |
2394 | unsigned int dest_shndx; | |
6c77229c AM |
2395 | to = stub_table->targ()->symval_for_branch(symtab, to, gsym, |
2396 | this->object_, | |
ec661b9d AM |
2397 | &dest_shndx); |
2398 | } | |
2399 | Address delta = to - from; | |
2400 | if (delta + max_branch_offset >= 2 * max_branch_offset) | |
2401 | { | |
2402 | stub_table->add_long_branch_entry(this->object_, to); | |
2403 | } | |
2404 | } | |
2405 | } | |
2406 | ||
2407 | // Relaxation hook. This is where we do stub generation. | |
2408 | ||
2409 | template<int size, bool big_endian> | |
2410 | bool | |
2411 | Target_powerpc<size, big_endian>::do_relax(int pass, | |
2412 | const Input_objects*, | |
2413 | Symbol_table* symtab, | |
2414 | Layout* layout, | |
2415 | const Task* task) | |
2416 | { | |
2417 | unsigned int prev_brlt_size = 0; | |
2418 | if (pass == 1) | |
ec661b9d | 2419 | { |
9e69ed50 AM |
2420 | bool thread_safe = parameters->options().plt_thread_safe(); |
2421 | if (size == 64 && !parameters->options().user_set_plt_thread_safe()) | |
ec661b9d | 2422 | { |
e2458743 | 2423 | static const char* const thread_starter[] = |
9e69ed50 AM |
2424 | { |
2425 | "pthread_create", | |
2426 | /* libstdc++ */ | |
2427 | "_ZNSt6thread15_M_start_threadESt10shared_ptrINS_10_Impl_baseEE", | |
2428 | /* librt */ | |
2429 | "aio_init", "aio_read", "aio_write", "aio_fsync", "lio_listio", | |
2430 | "mq_notify", "create_timer", | |
2431 | /* libanl */ | |
2432 | "getaddrinfo_a", | |
2433 | /* libgomp */ | |
2434 | "GOMP_parallel_start", | |
2435 | "GOMP_parallel_loop_static_start", | |
2436 | "GOMP_parallel_loop_dynamic_start", | |
2437 | "GOMP_parallel_loop_guided_start", | |
2438 | "GOMP_parallel_loop_runtime_start", | |
2439 | "GOMP_parallel_sections_start", | |
2440 | }; | |
2441 | ||
e2458743 AM |
2442 | if (parameters->options().shared()) |
2443 | thread_safe = true; | |
2444 | else | |
9e69ed50 | 2445 | { |
e2458743 AM |
2446 | for (unsigned int i = 0; |
2447 | i < sizeof(thread_starter) / sizeof(thread_starter[0]); | |
2448 | i++) | |
2449 | { | |
2450 | Symbol* sym = symtab->lookup(thread_starter[i], NULL); | |
2451 | thread_safe = (sym != NULL | |
2452 | && sym->in_reg() | |
2453 | && sym->in_real_elf()); | |
2454 | if (thread_safe) | |
2455 | break; | |
2456 | } | |
9e69ed50 | 2457 | } |
ec661b9d | 2458 | } |
9e69ed50 AM |
2459 | this->plt_thread_safe_ = thread_safe; |
2460 | this->group_sections(layout, task); | |
ec661b9d AM |
2461 | } |
2462 | ||
2463 | // We need address of stub tables valid for make_stub. | |
2464 | for (typename Stub_tables::iterator p = this->stub_tables_.begin(); | |
2465 | p != this->stub_tables_.end(); | |
2466 | ++p) | |
2467 | { | |
2468 | const Powerpc_relobj<size, big_endian>* object | |
2469 | = static_cast<const Powerpc_relobj<size, big_endian>*>((*p)->relobj()); | |
2470 | Address off = object->get_output_section_offset((*p)->shndx()); | |
2471 | gold_assert(off != invalid_address); | |
2472 | Output_section* os = (*p)->output_section(); | |
2473 | (*p)->set_address_and_size(os, off); | |
2474 | } | |
2475 | ||
9e69ed50 AM |
2476 | if (pass != 1) |
2477 | { | |
2478 | // Clear plt call stubs, long branch stubs and branch lookup table. | |
2479 | prev_brlt_size = this->branch_lookup_table_.size(); | |
2480 | this->branch_lookup_table_.clear(); | |
2481 | for (typename Stub_tables::iterator p = this->stub_tables_.begin(); | |
2482 | p != this->stub_tables_.end(); | |
2483 | ++p) | |
2484 | { | |
2485 | (*p)->clear_stubs(); | |
2486 | } | |
2487 | } | |
2488 | ||
2489 | // Build all the stubs. | |
ec661b9d AM |
2490 | Stub_table<size, big_endian>* ifunc_stub_table |
2491 | = this->stub_tables_.size() == 0 ? NULL : this->stub_tables_[0]; | |
2492 | Stub_table<size, big_endian>* one_stub_table | |
2493 | = this->stub_tables_.size() != 1 ? NULL : ifunc_stub_table; | |
2494 | for (typename Branches::const_iterator b = this->branch_info_.begin(); | |
2495 | b != this->branch_info_.end(); | |
2496 | b++) | |
2497 | { | |
2498 | b->make_stub(one_stub_table, ifunc_stub_table, symtab); | |
2499 | } | |
2500 | ||
9e69ed50 | 2501 | // Did anything change size? |
ec661b9d AM |
2502 | unsigned int num_huge_branches = this->branch_lookup_table_.size(); |
2503 | bool again = num_huge_branches != prev_brlt_size; | |
2504 | if (size == 64 && num_huge_branches != 0) | |
2505 | this->make_brlt_section(layout); | |
2506 | if (size == 64 && again) | |
2507 | this->brlt_section_->set_current_size(num_huge_branches); | |
2508 | ||
2509 | typedef Unordered_set<Output_section*> Output_sections; | |
2510 | Output_sections os_need_update; | |
2511 | for (typename Stub_tables::iterator p = this->stub_tables_.begin(); | |
2512 | p != this->stub_tables_.end(); | |
2513 | ++p) | |
2514 | { | |
2515 | if ((*p)->size_update()) | |
2516 | { | |
2517 | again = true; | |
9d5781f8 | 2518 | (*p)->add_eh_frame(layout); |
ec661b9d AM |
2519 | os_need_update.insert((*p)->output_section()); |
2520 | } | |
2521 | } | |
2522 | ||
9e69ed50 AM |
2523 | // Set output section offsets for all input sections in an output |
2524 | // section that just changed size. Anything past the stubs will | |
2525 | // need updating. | |
ec661b9d AM |
2526 | for (typename Output_sections::iterator p = os_need_update.begin(); |
2527 | p != os_need_update.end(); | |
2528 | p++) | |
2529 | { | |
2530 | Output_section* os = *p; | |
2531 | Address off = 0; | |
2532 | typedef Output_section::Input_section_list Input_section_list; | |
2533 | for (Input_section_list::const_iterator i = os->input_sections().begin(); | |
2534 | i != os->input_sections().end(); | |
2535 | ++i) | |
2536 | { | |
2537 | off = align_address(off, i->addralign()); | |
2538 | if (i->is_input_section() || i->is_relaxed_input_section()) | |
2539 | i->relobj()->set_section_offset(i->shndx(), off); | |
2540 | if (i->is_relaxed_input_section()) | |
2541 | { | |
2542 | Stub_table<size, big_endian>* stub_table | |
2543 | = static_cast<Stub_table<size, big_endian>*>( | |
2544 | i->relaxed_input_section()); | |
2545 | off += stub_table->set_address_and_size(os, off); | |
2546 | } | |
2547 | else | |
2548 | off += i->data_size(); | |
2549 | } | |
2550 | // If .brlt is part of this output section, then we have just | |
2551 | // done the offset adjustment. | |
2552 | os->clear_section_offsets_need_adjustment(); | |
2553 | } | |
2554 | ||
2555 | if (size == 64 | |
2556 | && !again | |
2557 | && num_huge_branches != 0 | |
2558 | && parameters->options().output_is_position_independent()) | |
2559 | { | |
2560 | // Fill in the BRLT relocs. | |
2561 | this->brlt_section_->reset_data_size(); | |
2562 | for (typename Branch_lookup_table::const_iterator p | |
2563 | = this->branch_lookup_table_.begin(); | |
2564 | p != this->branch_lookup_table_.end(); | |
2565 | ++p) | |
2566 | { | |
2567 | this->brlt_section_->add_reloc(p->first, p->second); | |
2568 | } | |
2569 | this->brlt_section_->finalize_data_size(); | |
2570 | } | |
2571 | return again; | |
2572 | } | |
2573 | ||
9d5781f8 AM |
2574 | template<int size, bool big_endian> |
2575 | void | |
2576 | Target_powerpc<size, big_endian>::do_plt_fde_location(const Output_data* plt, | |
2577 | unsigned char* oview, | |
2578 | uint64_t* paddress, | |
2579 | off_t* plen) const | |
2580 | { | |
2581 | uint64_t address = plt->address(); | |
2582 | off_t len = plt->data_size(); | |
2583 | ||
2584 | if (plt == this->glink_) | |
2585 | { | |
2586 | // See Output_data_glink::do_write() for glink contents. | |
2587 | if (size == 64) | |
2588 | { | |
2589 | // There is one word before __glink_PLTresolve | |
2590 | address += 8; | |
2591 | len -= 8; | |
2592 | } | |
2593 | else if (parameters->options().output_is_position_independent()) | |
2594 | { | |
2595 | // There are two FDEs for a position independent glink. | |
2596 | // The first covers the branch table, the second | |
2597 | // __glink_PLTresolve at the end of glink. | |
2598 | off_t resolve_size = this->glink_->pltresolve_size; | |
2599 | if (oview[9] == 0) | |
2600 | len -= resolve_size; | |
2601 | else | |
2602 | { | |
2603 | address += len - resolve_size; | |
2604 | len = resolve_size; | |
2605 | } | |
2606 | } | |
2607 | } | |
2608 | else | |
2609 | { | |
2610 | // Must be a stub table. | |
2611 | const Stub_table<size, big_endian>* stub_table | |
2612 | = static_cast<const Stub_table<size, big_endian>*>(plt); | |
2613 | uint64_t stub_address = stub_table->stub_address(); | |
2614 | len -= stub_address - address; | |
2615 | address = stub_address; | |
2616 | } | |
2617 | ||
2618 | *paddress = address; | |
2619 | *plen = len; | |
2620 | } | |
2621 | ||
42cacb20 DE |
2622 | // A class to handle the PLT data. |
2623 | ||
2624 | template<int size, bool big_endian> | |
cf43a2fe | 2625 | class Output_data_plt_powerpc : public Output_section_data_build |
42cacb20 DE |
2626 | { |
2627 | public: | |
2628 | typedef Output_data_reloc<elfcpp::SHT_RELA, true, | |
2629 | size, big_endian> Reloc_section; | |
2630 | ||
e5d5f5ed AM |
2631 | Output_data_plt_powerpc(Target_powerpc<size, big_endian>* targ, |
2632 | Reloc_section* plt_rel, | |
2633 | unsigned int reserved_size, | |
2634 | const char* name) | |
2635 | : Output_section_data_build(size == 32 ? 4 : 8), | |
2636 | rel_(plt_rel), | |
2637 | targ_(targ), | |
2638 | initial_plt_entry_size_(reserved_size), | |
2639 | name_(name) | |
2640 | { } | |
42cacb20 DE |
2641 | |
2642 | // Add an entry to the PLT. | |
03e25981 | 2643 | void |
cf43a2fe | 2644 | add_entry(Symbol*); |
42cacb20 | 2645 | |
03e25981 | 2646 | void |
e5d5f5ed AM |
2647 | add_ifunc_entry(Symbol*); |
2648 | ||
03e25981 | 2649 | void |
e5d5f5ed AM |
2650 | add_local_ifunc_entry(Sized_relobj_file<size, big_endian>*, unsigned int); |
2651 | ||
42cacb20 | 2652 | // Return the .rela.plt section data. |
e5d5f5ed | 2653 | Reloc_section* |
cf43a2fe AM |
2654 | rel_plt() const |
2655 | { | |
42cacb20 DE |
2656 | return this->rel_; |
2657 | } | |
2658 | ||
0e70b911 CC |
2659 | // Return the number of PLT entries. |
2660 | unsigned int | |
2661 | entry_count() const | |
d83ce4e3 | 2662 | { |
e5d5f5ed | 2663 | return ((this->current_data_size() - this->initial_plt_entry_size_) |
d83ce4e3 AM |
2664 | / plt_entry_size); |
2665 | } | |
0e70b911 CC |
2666 | |
2667 | // Return the offset of the first non-reserved PLT entry. | |
e5d5f5ed | 2668 | unsigned int |
0e70b911 | 2669 | first_plt_entry_offset() |
e5d5f5ed | 2670 | { return this->initial_plt_entry_size_; } |
0e70b911 CC |
2671 | |
2672 | // Return the size of a PLT entry. | |
2673 | static unsigned int | |
2674 | get_plt_entry_size() | |
cf43a2fe | 2675 | { return plt_entry_size; } |
0e70b911 | 2676 | |
42cacb20 | 2677 | protected: |
42cacb20 | 2678 | void |
cf43a2fe | 2679 | do_adjust_output_section(Output_section* os) |
42cacb20 | 2680 | { |
cf43a2fe | 2681 | os->set_entsize(0); |
42cacb20 DE |
2682 | } |
2683 | ||
6ce78956 AM |
2684 | // Write to a map file. |
2685 | void | |
2686 | do_print_to_mapfile(Mapfile* mapfile) const | |
e5d5f5ed | 2687 | { mapfile->print_output_data(this, this->name_); } |
6ce78956 | 2688 | |
cf43a2fe AM |
2689 | private: |
2690 | // The size of an entry in the PLT. | |
2691 | static const int plt_entry_size = size == 32 ? 4 : 24; | |
cf43a2fe | 2692 | |
42cacb20 DE |
2693 | // Write out the PLT data. |
2694 | void | |
2695 | do_write(Output_file*); | |
2696 | ||
2697 | // The reloc section. | |
2698 | Reloc_section* rel_; | |
cf43a2fe AM |
2699 | // Allows access to .glink for do_write. |
2700 | Target_powerpc<size, big_endian>* targ_; | |
e5d5f5ed AM |
2701 | // The size of the first reserved entry. |
2702 | int initial_plt_entry_size_; | |
2703 | // What to report in map file. | |
2704 | const char *name_; | |
42cacb20 DE |
2705 | }; |
2706 | ||
e5d5f5ed | 2707 | // Add an entry to the PLT. |
42cacb20 DE |
2708 | |
2709 | template<int size, bool big_endian> | |
03e25981 | 2710 | void |
e5d5f5ed | 2711 | Output_data_plt_powerpc<size, big_endian>::add_entry(Symbol* gsym) |
42cacb20 | 2712 | { |
e5d5f5ed AM |
2713 | if (!gsym->has_plt_offset()) |
2714 | { | |
ec661b9d | 2715 | section_size_type off = this->current_data_size(); |
e5d5f5ed AM |
2716 | if (off == 0) |
2717 | off += this->first_plt_entry_offset(); | |
2718 | gsym->set_plt_offset(off); | |
2719 | gsym->set_needs_dynsym_entry(); | |
2720 | unsigned int dynrel = elfcpp::R_POWERPC_JMP_SLOT; | |
2721 | this->rel_->add_global(gsym, dynrel, this, off, 0); | |
2722 | off += plt_entry_size; | |
2723 | this->set_current_data_size(off); | |
2724 | } | |
42cacb20 DE |
2725 | } |
2726 | ||
e5d5f5ed | 2727 | // Add an entry for a global ifunc symbol that resolves locally, to the IPLT. |
42cacb20 DE |
2728 | |
2729 | template<int size, bool big_endian> | |
03e25981 | 2730 | void |
e5d5f5ed | 2731 | Output_data_plt_powerpc<size, big_endian>::add_ifunc_entry(Symbol* gsym) |
42cacb20 | 2732 | { |
cf43a2fe AM |
2733 | if (!gsym->has_plt_offset()) |
2734 | { | |
ec661b9d | 2735 | section_size_type off = this->current_data_size(); |
cf43a2fe | 2736 | gsym->set_plt_offset(off); |
e5d5f5ed AM |
2737 | unsigned int dynrel = elfcpp::R_POWERPC_IRELATIVE; |
2738 | if (size == 64) | |
2739 | dynrel = elfcpp::R_PPC64_JMP_IREL; | |
2740 | this->rel_->add_symbolless_global_addend(gsym, dynrel, this, off, 0); | |
2741 | off += plt_entry_size; | |
2742 | this->set_current_data_size(off); | |
2743 | } | |
2744 | } | |
2745 | ||
2746 | // Add an entry for a local ifunc symbol to the IPLT. | |
2747 | ||
2748 | template<int size, bool big_endian> | |
03e25981 | 2749 | void |
e5d5f5ed AM |
2750 | Output_data_plt_powerpc<size, big_endian>::add_local_ifunc_entry( |
2751 | Sized_relobj_file<size, big_endian>* relobj, | |
2752 | unsigned int local_sym_index) | |
2753 | { | |
2754 | if (!relobj->local_has_plt_offset(local_sym_index)) | |
2755 | { | |
ec661b9d | 2756 | section_size_type off = this->current_data_size(); |
e5d5f5ed AM |
2757 | relobj->set_local_plt_offset(local_sym_index, off); |
2758 | unsigned int dynrel = elfcpp::R_POWERPC_IRELATIVE; | |
2759 | if (size == 64) | |
2760 | dynrel = elfcpp::R_PPC64_JMP_IREL; | |
2761 | this->rel_->add_symbolless_local_addend(relobj, local_sym_index, dynrel, | |
2762 | this, off, 0); | |
cf43a2fe AM |
2763 | off += plt_entry_size; |
2764 | this->set_current_data_size(off); | |
2765 | } | |
42cacb20 DE |
2766 | } |
2767 | ||
dd93cd0a | 2768 | static const uint32_t add_0_11_11 = 0x7c0b5a14; |
9e69ed50 | 2769 | static const uint32_t add_2_2_11 = 0x7c425a14; |
dd93cd0a AM |
2770 | static const uint32_t add_3_3_2 = 0x7c631214; |
2771 | static const uint32_t add_3_3_13 = 0x7c636a14; | |
2772 | static const uint32_t add_11_0_11 = 0x7d605a14; | |
2773 | static const uint32_t add_12_2_11 = 0x7d825a14; | |
9e69ed50 | 2774 | static const uint32_t add_12_12_11 = 0x7d8c5a14; |
dd93cd0a AM |
2775 | static const uint32_t addi_11_11 = 0x396b0000; |
2776 | static const uint32_t addi_12_12 = 0x398c0000; | |
2777 | static const uint32_t addi_2_2 = 0x38420000; | |
2778 | static const uint32_t addi_3_2 = 0x38620000; | |
2779 | static const uint32_t addi_3_3 = 0x38630000; | |
2780 | static const uint32_t addis_0_2 = 0x3c020000; | |
2781 | static const uint32_t addis_0_13 = 0x3c0d0000; | |
c9269dff AM |
2782 | static const uint32_t addis_11_11 = 0x3d6b0000; |
2783 | static const uint32_t addis_11_30 = 0x3d7e0000; | |
2784 | static const uint32_t addis_12_12 = 0x3d8c0000; | |
dd93cd0a AM |
2785 | static const uint32_t addis_12_2 = 0x3d820000; |
2786 | static const uint32_t addis_3_2 = 0x3c620000; | |
2787 | static const uint32_t addis_3_13 = 0x3c6d0000; | |
c9269dff AM |
2788 | static const uint32_t b = 0x48000000; |
2789 | static const uint32_t bcl_20_31 = 0x429f0005; | |
2790 | static const uint32_t bctr = 0x4e800420; | |
f3a0ed29 | 2791 | static const uint32_t blr = 0x4e800020; |
c9269dff | 2792 | static const uint32_t blrl = 0x4e800021; |
9e69ed50 AM |
2793 | static const uint32_t bnectr_p4 = 0x4ce20420; |
2794 | static const uint32_t cmpldi_2_0 = 0x28220000; | |
dd93cd0a AM |
2795 | static const uint32_t cror_15_15_15 = 0x4def7b82; |
2796 | static const uint32_t cror_31_31_31 = 0x4ffffb82; | |
f3a0ed29 AM |
2797 | static const uint32_t ld_0_1 = 0xe8010000; |
2798 | static const uint32_t ld_0_12 = 0xe80c0000; | |
dd93cd0a AM |
2799 | static const uint32_t ld_11_12 = 0xe96c0000; |
2800 | static const uint32_t ld_11_2 = 0xe9620000; | |
2801 | static const uint32_t ld_2_1 = 0xe8410000; | |
2802 | static const uint32_t ld_2_11 = 0xe84b0000; | |
2803 | static const uint32_t ld_2_12 = 0xe84c0000; | |
2804 | static const uint32_t ld_2_2 = 0xe8420000; | |
f3a0ed29 | 2805 | static const uint32_t lfd_0_1 = 0xc8010000; |
dd93cd0a | 2806 | static const uint32_t li_0_0 = 0x38000000; |
f3a0ed29 | 2807 | static const uint32_t li_12_0 = 0x39800000; |
dd93cd0a | 2808 | static const uint32_t lis_0_0 = 0x3c000000; |
c9269dff AM |
2809 | static const uint32_t lis_11 = 0x3d600000; |
2810 | static const uint32_t lis_12 = 0x3d800000; | |
c9269dff AM |
2811 | static const uint32_t lwz_0_12 = 0x800c0000; |
2812 | static const uint32_t lwz_11_11 = 0x816b0000; | |
2813 | static const uint32_t lwz_11_30 = 0x817e0000; | |
2814 | static const uint32_t lwz_12_12 = 0x818c0000; | |
dd93cd0a | 2815 | static const uint32_t lwzu_0_12 = 0x840c0000; |
f3a0ed29 | 2816 | static const uint32_t lvx_0_12_0 = 0x7c0c00ce; |
c9269dff | 2817 | static const uint32_t mflr_0 = 0x7c0802a6; |
dd93cd0a | 2818 | static const uint32_t mflr_11 = 0x7d6802a6; |
c9269dff AM |
2819 | static const uint32_t mflr_12 = 0x7d8802a6; |
2820 | static const uint32_t mtctr_0 = 0x7c0903a6; | |
2821 | static const uint32_t mtctr_11 = 0x7d6903a6; | |
ec661b9d | 2822 | static const uint32_t mtctr_12 = 0x7d8903a6; |
c9269dff | 2823 | static const uint32_t mtlr_0 = 0x7c0803a6; |
c9269dff | 2824 | static const uint32_t mtlr_12 = 0x7d8803a6; |
dd93cd0a | 2825 | static const uint32_t nop = 0x60000000; |
c9269dff | 2826 | static const uint32_t ori_0_0_0 = 0x60000000; |
f3a0ed29 AM |
2827 | static const uint32_t std_0_1 = 0xf8010000; |
2828 | static const uint32_t std_0_12 = 0xf80c0000; | |
dd93cd0a | 2829 | static const uint32_t std_2_1 = 0xf8410000; |
f3a0ed29 AM |
2830 | static const uint32_t stfd_0_1 = 0xd8010000; |
2831 | static const uint32_t stvx_0_12_0 = 0x7c0c01ce; | |
dd93cd0a | 2832 | static const uint32_t sub_11_11_12 = 0x7d6c5850; |
9e69ed50 | 2833 | static const uint32_t xor_11_11_11 = 0x7d6b5a78; |
42cacb20 DE |
2834 | |
2835 | // Write out the PLT. | |
2836 | ||
2837 | template<int size, bool big_endian> | |
2838 | void | |
2839 | Output_data_plt_powerpc<size, big_endian>::do_write(Output_file* of) | |
2840 | { | |
cf43a2fe AM |
2841 | if (size == 32) |
2842 | { | |
ec661b9d | 2843 | const section_size_type offset = this->offset(); |
cf43a2fe AM |
2844 | const section_size_type oview_size |
2845 | = convert_to_section_size_type(this->data_size()); | |
2846 | unsigned char* const oview = of->get_output_view(offset, oview_size); | |
2847 | unsigned char* pov = oview; | |
2848 | unsigned char* endpov = oview + oview_size; | |
2849 | ||
e5d5f5ed | 2850 | // The address of the .glink branch table |
cf43a2fe AM |
2851 | const Output_data_glink<size, big_endian>* glink |
2852 | = this->targ_->glink_section(); | |
ec661b9d | 2853 | elfcpp::Elf_types<32>::Elf_Addr branch_tab = glink->address(); |
cf43a2fe AM |
2854 | |
2855 | while (pov < endpov) | |
2856 | { | |
2857 | elfcpp::Swap<32, big_endian>::writeval(pov, branch_tab); | |
2858 | pov += 4; | |
2859 | branch_tab += 4; | |
2860 | } | |
2861 | ||
2862 | of->write_output_view(offset, oview_size, oview); | |
2863 | } | |
2864 | } | |
2865 | ||
2866 | // Create the PLT section. | |
2867 | ||
2868 | template<int size, bool big_endian> | |
2869 | void | |
40b469d7 AM |
2870 | Target_powerpc<size, big_endian>::make_plt_section(Symbol_table* symtab, |
2871 | Layout* layout) | |
cf43a2fe AM |
2872 | { |
2873 | if (this->plt_ == NULL) | |
2874 | { | |
40b469d7 AM |
2875 | if (this->got_ == NULL) |
2876 | this->got_section(symtab, layout); | |
2877 | ||
cf43a2fe AM |
2878 | if (this->glink_ == NULL) |
2879 | make_glink_section(layout); | |
2880 | ||
2881 | // Ensure that .rela.dyn always appears before .rela.plt This is | |
2882 | // necessary due to how, on PowerPC and some other targets, .rela.dyn | |
2883 | // needs to include .rela.plt in it's range. | |
2884 | this->rela_dyn_section(layout); | |
2885 | ||
e5d5f5ed AM |
2886 | Reloc_section* plt_rel = new Reloc_section(false); |
2887 | layout->add_output_section_data(".rela.plt", elfcpp::SHT_RELA, | |
2888 | elfcpp::SHF_ALLOC, plt_rel, | |
2889 | ORDER_DYNAMIC_PLT_RELOCS, false); | |
2890 | this->plt_ | |
2891 | = new Output_data_plt_powerpc<size, big_endian>(this, plt_rel, | |
2892 | size == 32 ? 0 : 24, | |
2893 | "** PLT"); | |
cf43a2fe AM |
2894 | layout->add_output_section_data(".plt", |
2895 | (size == 32 | |
2896 | ? elfcpp::SHT_PROGBITS | |
2897 | : elfcpp::SHT_NOBITS), | |
2898 | elfcpp::SHF_ALLOC | elfcpp::SHF_WRITE, | |
2899 | this->plt_, | |
2900 | (size == 32 | |
2901 | ? ORDER_SMALL_DATA | |
2902 | : ORDER_SMALL_BSS), | |
2903 | false); | |
2904 | } | |
2905 | } | |
2906 | ||
e5d5f5ed AM |
2907 | // Create the IPLT section. |
2908 | ||
2909 | template<int size, bool big_endian> | |
2910 | void | |
40b469d7 AM |
2911 | Target_powerpc<size, big_endian>::make_iplt_section(Symbol_table* symtab, |
2912 | Layout* layout) | |
e5d5f5ed AM |
2913 | { |
2914 | if (this->iplt_ == NULL) | |
2915 | { | |
40b469d7 | 2916 | this->make_plt_section(symtab, layout); |
e5d5f5ed AM |
2917 | |
2918 | Reloc_section* iplt_rel = new Reloc_section(false); | |
2919 | this->rela_dyn_->output_section()->add_output_section_data(iplt_rel); | |
2920 | this->iplt_ | |
2921 | = new Output_data_plt_powerpc<size, big_endian>(this, iplt_rel, | |
2922 | 0, "** IPLT"); | |
2923 | this->plt_->output_section()->add_output_section_data(this->iplt_); | |
e5d5f5ed AM |
2924 | } |
2925 | } | |
2926 | ||
ec661b9d | 2927 | // A section for huge long branch addresses, similar to plt section. |
cf43a2fe AM |
2928 | |
2929 | template<int size, bool big_endian> | |
ec661b9d | 2930 | class Output_data_brlt_powerpc : public Output_section_data_build |
cf43a2fe AM |
2931 | { |
2932 | public: | |
ec661b9d AM |
2933 | typedef typename elfcpp::Elf_types<size>::Elf_Addr Address; |
2934 | typedef Output_data_reloc<elfcpp::SHT_RELA, true, | |
2935 | size, big_endian> Reloc_section; | |
c9269dff | 2936 | |
ec661b9d AM |
2937 | Output_data_brlt_powerpc(Target_powerpc<size, big_endian>* targ, |
2938 | Reloc_section* brlt_rel) | |
2939 | : Output_section_data_build(size == 32 ? 4 : 8), | |
2940 | rel_(brlt_rel), | |
2941 | targ_(targ) | |
2942 | { } | |
cf43a2fe | 2943 | |
ec661b9d | 2944 | // Add a reloc for an entry in the BRLT. |
cf43a2fe | 2945 | void |
ec661b9d AM |
2946 | add_reloc(Address to, unsigned int off) |
2947 | { this->rel_->add_relative(elfcpp::R_POWERPC_RELATIVE, this, off, to); } | |
e5d5f5ed | 2948 | |
ec661b9d | 2949 | // Update section and reloc section size. |
e5d5f5ed | 2950 | void |
ec661b9d AM |
2951 | set_current_size(unsigned int num_branches) |
2952 | { | |
2953 | this->reset_address_and_file_offset(); | |
2954 | this->set_current_data_size(num_branches * 16); | |
2955 | this->finalize_data_size(); | |
2956 | Output_section* os = this->output_section(); | |
2957 | os->set_section_offsets_need_adjustment(); | |
2958 | if (this->rel_ != NULL) | |
2959 | { | |
2960 | unsigned int reloc_size | |
2961 | = Reloc_types<elfcpp::SHT_RELA, size, big_endian>::reloc_size; | |
2962 | this->rel_->reset_address_and_file_offset(); | |
2963 | this->rel_->set_current_data_size(num_branches * reloc_size); | |
2964 | this->rel_->finalize_data_size(); | |
2965 | Output_section* os = this->rel_->output_section(); | |
2966 | os->set_section_offsets_need_adjustment(); | |
2967 | } | |
2968 | } | |
cf43a2fe | 2969 | |
ec661b9d AM |
2970 | protected: |
2971 | void | |
2972 | do_adjust_output_section(Output_section* os) | |
2973 | { | |
2974 | os->set_entsize(0); | |
2975 | } | |
e5d5f5ed | 2976 | |
ec661b9d AM |
2977 | // Write to a map file. |
2978 | void | |
2979 | do_print_to_mapfile(Mapfile* mapfile) const | |
2980 | { mapfile->print_output_data(this, "** BRLT"); } | |
c9824451 | 2981 | |
ec661b9d AM |
2982 | private: |
2983 | // Write out the BRLT data. | |
2984 | void | |
2985 | do_write(Output_file*); | |
c9824451 | 2986 | |
ec661b9d AM |
2987 | // The reloc section. |
2988 | Reloc_section* rel_; | |
2989 | Target_powerpc<size, big_endian>* targ_; | |
2990 | }; | |
cf43a2fe | 2991 | |
ec661b9d AM |
2992 | // Make the branch lookup table section. |
2993 | ||
2994 | template<int size, bool big_endian> | |
2995 | void | |
2996 | Target_powerpc<size, big_endian>::make_brlt_section(Layout* layout) | |
2997 | { | |
2998 | if (size == 64 && this->brlt_section_ == NULL) | |
2999 | { | |
3000 | Reloc_section* brlt_rel = NULL; | |
3001 | bool is_pic = parameters->options().output_is_position_independent(); | |
3002 | if (is_pic) | |
3003 | { | |
3004 | // When PIC we can't fill in .brlt (like .plt it can be a | |
3005 | // bss style section) but must initialise at runtime via | |
3006 | // dynamic relocats. | |
3007 | this->rela_dyn_section(layout); | |
3008 | brlt_rel = new Reloc_section(false); | |
3009 | this->rela_dyn_->output_section()->add_output_section_data(brlt_rel); | |
3010 | } | |
3011 | this->brlt_section_ | |
3012 | = new Output_data_brlt_powerpc<size, big_endian>(this, brlt_rel); | |
3013 | if (this->plt_ && is_pic) | |
3014 | this->plt_->output_section() | |
3015 | ->add_output_section_data(this->brlt_section_); | |
3016 | else | |
3017 | layout->add_output_section_data(".brlt", | |
3018 | (is_pic ? elfcpp::SHT_NOBITS | |
3019 | : elfcpp::SHT_PROGBITS), | |
3020 | elfcpp::SHF_ALLOC | elfcpp::SHF_WRITE, | |
3021 | this->brlt_section_, | |
3022 | (is_pic ? ORDER_SMALL_BSS | |
3023 | : ORDER_SMALL_DATA), | |
3024 | false); | |
3025 | } | |
3026 | } | |
3027 | ||
3028 | // Write out .brlt when non-PIC. | |
3029 | ||
3030 | template<int size, bool big_endian> | |
3031 | void | |
3032 | Output_data_brlt_powerpc<size, big_endian>::do_write(Output_file* of) | |
3033 | { | |
3034 | if (size == 64 && !parameters->options().output_is_position_independent()) | |
3035 | { | |
3036 | const section_size_type offset = this->offset(); | |
3037 | const section_size_type oview_size | |
3038 | = convert_to_section_size_type(this->data_size()); | |
3039 | unsigned char* const oview = of->get_output_view(offset, oview_size); | |
3040 | ||
3041 | this->targ_->write_branch_lookup_table(oview); | |
3042 | of->write_output_view(offset, oview_size, oview); | |
3043 | } | |
3044 | } | |
3045 | ||
9e69ed50 AM |
3046 | static inline uint32_t |
3047 | l(uint32_t a) | |
3048 | { | |
3049 | return a & 0xffff; | |
3050 | } | |
3051 | ||
3052 | static inline uint32_t | |
3053 | hi(uint32_t a) | |
3054 | { | |
3055 | return l(a >> 16); | |
3056 | } | |
3057 | ||
3058 | static inline uint32_t | |
3059 | ha(uint32_t a) | |
3060 | { | |
3061 | return hi(a + 0x8000); | |
3062 | } | |
3063 | ||
9d5781f8 AM |
3064 | template<int size> |
3065 | struct Eh_cie | |
3066 | { | |
3067 | static const unsigned char eh_frame_cie[12]; | |
3068 | }; | |
3069 | ||
3070 | template<int size> | |
3071 | const unsigned char Eh_cie<size>::eh_frame_cie[] = | |
3072 | { | |
3073 | 1, // CIE version. | |
3074 | 'z', 'R', 0, // Augmentation string. | |
3075 | 4, // Code alignment. | |
3076 | 0x80 - size / 8 , // Data alignment. | |
3077 | 65, // RA reg. | |
3078 | 1, // Augmentation size. | |
3079 | (elfcpp::DW_EH_PE_pcrel | |
3080 | | elfcpp::DW_EH_PE_sdata4), // FDE encoding. | |
3081 | elfcpp::DW_CFA_def_cfa, 1, 0 // def_cfa: r1 offset 0. | |
3082 | }; | |
3083 | ||
3084 | // Describe __glink_PLTresolve use of LR, 64-bit version. | |
3085 | static const unsigned char glink_eh_frame_fde_64[] = | |
3086 | { | |
3087 | 0, 0, 0, 0, // Replaced with offset to .glink. | |
3088 | 0, 0, 0, 0, // Replaced with size of .glink. | |
3089 | 0, // Augmentation size. | |
3090 | elfcpp::DW_CFA_advance_loc + 1, | |
3091 | elfcpp::DW_CFA_register, 65, 12, | |
3092 | elfcpp::DW_CFA_advance_loc + 4, | |
3093 | elfcpp::DW_CFA_restore_extended, 65 | |
3094 | }; | |
3095 | ||
3096 | // Describe __glink_PLTresolve use of LR, 32-bit version. | |
3097 | static const unsigned char glink_eh_frame_fde_32[] = | |
3098 | { | |
3099 | 0, 0, 0, 0, // Replaced with offset to .glink. | |
3100 | 0, 0, 0, 0, // Replaced with size of .glink. | |
3101 | 0, // Augmentation size. | |
3102 | elfcpp::DW_CFA_advance_loc + 2, | |
3103 | elfcpp::DW_CFA_register, 65, 0, | |
3104 | elfcpp::DW_CFA_advance_loc + 4, | |
3105 | elfcpp::DW_CFA_restore_extended, 65 | |
3106 | }; | |
3107 | ||
3108 | static const unsigned char default_fde[] = | |
3109 | { | |
3110 | 0, 0, 0, 0, // Replaced with offset to stubs. | |
3111 | 0, 0, 0, 0, // Replaced with size of stubs. | |
3112 | 0, // Augmentation size. | |
3113 | elfcpp::DW_CFA_nop, // Pad. | |
3114 | elfcpp::DW_CFA_nop, | |
3115 | elfcpp::DW_CFA_nop | |
3116 | }; | |
3117 | ||
9e69ed50 AM |
3118 | template<bool big_endian> |
3119 | static inline void | |
3120 | write_insn(unsigned char* p, uint32_t v) | |
3121 | { | |
3122 | elfcpp::Swap<32, big_endian>::writeval(p, v); | |
3123 | } | |
3124 | ||
ec661b9d AM |
3125 | // Stub_table holds information about plt and long branch stubs. |
3126 | // Stubs are built in an area following some input section determined | |
3127 | // by group_sections(). This input section is converted to a relaxed | |
3128 | // input section allowing it to be resized to accommodate the stubs | |
3129 | ||
3130 | template<int size, bool big_endian> | |
3131 | class Stub_table : public Output_relaxed_input_section | |
3132 | { | |
3133 | public: | |
3134 | typedef typename elfcpp::Elf_types<size>::Elf_Addr Address; | |
3135 | static const Address invalid_address = static_cast<Address>(0) - 1; | |
3136 | ||
3137 | Stub_table(Target_powerpc<size, big_endian>* targ) | |
3138 | : Output_relaxed_input_section(NULL, 0, 0), | |
3139 | targ_(targ), plt_call_stubs_(), long_branch_stubs_(), | |
9e69ed50 | 3140 | orig_data_size_(0), plt_size_(0), last_plt_size_(0), |
9d5781f8 | 3141 | branch_size_(0), last_branch_size_(0), eh_frame_added_(false) |
ec661b9d AM |
3142 | { } |
3143 | ||
3144 | // Delayed Output_relaxed_input_section init. | |
3145 | void | |
3146 | init(const Output_section::Input_section*, Output_section*); | |
3147 | ||
3148 | // Add a plt call stub. | |
3149 | void | |
3150 | add_plt_call_entry(const Sized_relobj_file<size, big_endian>*, | |
3151 | const Symbol*, | |
3152 | unsigned int, | |
3153 | Address); | |
3154 | ||
3155 | void | |
3156 | add_plt_call_entry(const Sized_relobj_file<size, big_endian>*, | |
3157 | unsigned int, | |
3158 | unsigned int, | |
3159 | Address); | |
3160 | ||
3161 | // Find a given plt call stub. | |
3162 | Address | |
3163 | find_plt_call_entry(const Symbol*) const; | |
3164 | ||
3165 | Address | |
3166 | find_plt_call_entry(const Sized_relobj_file<size, big_endian>*, | |
3167 | unsigned int) const; | |
3168 | ||
3169 | Address | |
3170 | find_plt_call_entry(const Sized_relobj_file<size, big_endian>*, | |
3171 | const Symbol*, | |
3172 | unsigned int, | |
3173 | Address) const; | |
3174 | ||
3175 | Address | |
3176 | find_plt_call_entry(const Sized_relobj_file<size, big_endian>*, | |
3177 | unsigned int, | |
3178 | unsigned int, | |
3179 | Address) const; | |
3180 | ||
3181 | // Add a long branch stub. | |
3182 | void | |
3183 | add_long_branch_entry(const Powerpc_relobj<size, big_endian>*, Address); | |
3184 | ||
3185 | Address | |
9d5781f8 AM |
3186 | find_long_branch_entry(const Powerpc_relobj<size, big_endian>*, |
3187 | Address) const; | |
ec661b9d AM |
3188 | |
3189 | void | |
9e69ed50 | 3190 | clear_stubs() |
cf43a2fe | 3191 | { |
9e69ed50 AM |
3192 | this->plt_call_stubs_.clear(); |
3193 | this->plt_size_ = 0; | |
ec661b9d AM |
3194 | this->long_branch_stubs_.clear(); |
3195 | this->branch_size_ = 0; | |
cf43a2fe AM |
3196 | } |
3197 | ||
ec661b9d AM |
3198 | Address |
3199 | set_address_and_size(const Output_section* os, Address off) | |
cf43a2fe | 3200 | { |
ec661b9d AM |
3201 | Address start_off = off; |
3202 | off += this->orig_data_size_; | |
3203 | Address my_size = this->plt_size_ + this->branch_size_; | |
3204 | if (my_size != 0) | |
3205 | off = align_address(off, this->stub_align()); | |
3206 | // Include original section size and alignment padding in size | |
3207 | my_size += off - start_off; | |
3208 | this->reset_address_and_file_offset(); | |
3209 | this->set_current_data_size(my_size); | |
3210 | this->set_address_and_file_offset(os->address() + start_off, | |
3211 | os->offset() + start_off); | |
3212 | return my_size; | |
cf43a2fe AM |
3213 | } |
3214 | ||
ec661b9d | 3215 | Address |
9d5781f8 | 3216 | stub_address() const |
ec661b9d AM |
3217 | { |
3218 | return align_address(this->address() + this->orig_data_size_, | |
3219 | this->stub_align()); | |
3220 | } | |
3221 | ||
3222 | Address | |
9d5781f8 | 3223 | stub_offset() const |
ec661b9d AM |
3224 | { |
3225 | return align_address(this->offset() + this->orig_data_size_, | |
3226 | this->stub_align()); | |
3227 | } | |
3228 | ||
3229 | section_size_type | |
3230 | plt_size() const | |
3231 | { return this->plt_size_; } | |
3232 | ||
3233 | bool | |
3234 | size_update() | |
3235 | { | |
3236 | Output_section* os = this->output_section(); | |
3237 | if (os->addralign() < this->stub_align()) | |
3238 | { | |
3239 | os->set_addralign(this->stub_align()); | |
3240 | // FIXME: get rid of the insane checkpointing. | |
3241 | // We can't increase alignment of the input section to which | |
3242 | // stubs are attached; The input section may be .init which | |
3243 | // is pasted together with other .init sections to form a | |
3244 | // function. Aligning might insert zero padding resulting in | |
3245 | // sigill. However we do need to increase alignment of the | |
3246 | // output section so that the align_address() on offset in | |
3247 | // set_address_and_size() adds the same padding as the | |
3248 | // align_address() on address in stub_address(). | |
3249 | // What's more, we need this alignment for the layout done in | |
3250 | // relaxation_loop_body() so that the output section starts at | |
3251 | // a suitably aligned address. | |
3252 | os->checkpoint_set_addralign(this->stub_align()); | |
3253 | } | |
9e69ed50 AM |
3254 | if (this->last_plt_size_ != this->plt_size_ |
3255 | || this->last_branch_size_ != this->branch_size_) | |
ec661b9d | 3256 | { |
9e69ed50 AM |
3257 | this->last_plt_size_ = this->plt_size_; |
3258 | this->last_branch_size_ = this->branch_size_; | |
ec661b9d AM |
3259 | return true; |
3260 | } | |
3261 | return false; | |
3262 | } | |
3263 | ||
9d5781f8 AM |
3264 | // Add .eh_frame info for this stub section. Unlike other linker |
3265 | // generated .eh_frame this is added late in the link, because we | |
3266 | // only want the .eh_frame info if this particular stub section is | |
3267 | // non-empty. | |
3268 | void | |
3269 | add_eh_frame(Layout* layout) | |
3270 | { | |
3271 | if (!this->eh_frame_added_) | |
3272 | { | |
3273 | if (!parameters->options().ld_generated_unwind_info()) | |
3274 | return; | |
3275 | ||
3276 | // Since we add stub .eh_frame info late, it must be placed | |
3277 | // after all other linker generated .eh_frame info so that | |
3278 | // merge mapping need not be updated for input sections. | |
3279 | // There is no provision to use a different CIE to that used | |
3280 | // by .glink. | |
3281 | if (!this->targ_->has_glink()) | |
3282 | return; | |
3283 | ||
3284 | layout->add_eh_frame_for_plt(this, | |
3285 | Eh_cie<size>::eh_frame_cie, | |
3286 | sizeof (Eh_cie<size>::eh_frame_cie), | |
3287 | default_fde, | |
3288 | sizeof (default_fde)); | |
3289 | this->eh_frame_added_ = true; | |
3290 | } | |
3291 | } | |
3292 | ||
ec661b9d AM |
3293 | Target_powerpc<size, big_endian>* |
3294 | targ() const | |
3295 | { return targ_; } | |
6ce78956 | 3296 | |
cf43a2fe | 3297 | private: |
9e69ed50 AM |
3298 | class Plt_stub_ent; |
3299 | class Plt_stub_ent_hash; | |
3300 | typedef Unordered_map<Plt_stub_ent, unsigned int, | |
3301 | Plt_stub_ent_hash> Plt_stub_entries; | |
3302 | ||
3303 | // Alignment of stub section. | |
ec661b9d | 3304 | unsigned int |
9e69ed50 AM |
3305 | stub_align() const |
3306 | { | |
3307 | if (size == 32) | |
3308 | return 16; | |
3309 | unsigned int min_align = 32; | |
3310 | unsigned int user_align = 1 << parameters->options().plt_align(); | |
3311 | return std::max(user_align, min_align); | |
3312 | } | |
cf43a2fe | 3313 | |
91c2b899 AM |
3314 | // Return the plt offset for the given call stub. |
3315 | Address | |
3316 | plt_off(typename Plt_stub_entries::const_iterator p, bool* is_iplt) const | |
3317 | { | |
3318 | const Symbol* gsym = p->first.sym_; | |
3319 | if (gsym != NULL) | |
3320 | { | |
3321 | *is_iplt = (gsym->type() == elfcpp::STT_GNU_IFUNC | |
3322 | && gsym->can_use_relative_reloc(false)); | |
3323 | return gsym->plt_offset(); | |
3324 | } | |
3325 | else | |
3326 | { | |
3327 | *is_iplt = true; | |
3328 | const Sized_relobj_file<size, big_endian>* relobj = p->first.object_; | |
3329 | unsigned int local_sym_index = p->first.locsym_; | |
3330 | return relobj->local_plt_offset(local_sym_index); | |
3331 | } | |
3332 | } | |
3333 | ||
9e69ed50 | 3334 | // Size of a given plt call stub. |
ec661b9d | 3335 | unsigned int |
9e69ed50 AM |
3336 | plt_call_size(typename Plt_stub_entries::const_iterator p) const |
3337 | { | |
3338 | if (size == 32) | |
3339 | return 16; | |
3340 | ||
91c2b899 AM |
3341 | bool is_iplt; |
3342 | Address plt_addr = this->plt_off(p, &is_iplt); | |
3343 | if (is_iplt) | |
3344 | plt_addr += this->targ_->iplt_section()->address(); | |
9e69ed50 | 3345 | else |
91c2b899 AM |
3346 | plt_addr += this->targ_->plt_section()->address(); |
3347 | Address got_addr = this->targ_->got_section()->output_section()->address(); | |
9e69ed50 AM |
3348 | const Powerpc_relobj<size, big_endian>* ppcobj = static_cast |
3349 | <const Powerpc_relobj<size, big_endian>*>(p->first.object_); | |
91c2b899 AM |
3350 | got_addr += ppcobj->toc_base_offset(); |
3351 | Address off = plt_addr - got_addr; | |
9e69ed50 AM |
3352 | bool static_chain = parameters->options().plt_static_chain(); |
3353 | bool thread_safe = this->targ_->plt_thread_safe(); | |
3354 | unsigned int bytes = (4 * 5 | |
3355 | + 4 * static_chain | |
3356 | + 8 * thread_safe | |
3357 | + 4 * (ha(off) != 0) | |
3358 | + 4 * (ha(off + 8 + 8 * static_chain) != ha(off))); | |
3359 | unsigned int align = 1 << parameters->options().plt_align(); | |
3360 | if (align > 1) | |
3361 | bytes = (bytes + align - 1) & -align; | |
3362 | return bytes; | |
3363 | } | |
ec661b9d AM |
3364 | |
3365 | // Return long branch stub size. | |
3366 | unsigned int | |
3367 | branch_stub_size(Address to) | |
3368 | { | |
9e69ed50 AM |
3369 | Address loc |
3370 | = this->stub_address() + this->last_plt_size_ + this->branch_size_; | |
3371 | if (to - loc + (1 << 25) < 2 << 25) | |
ec661b9d AM |
3372 | return 4; |
3373 | if (size == 64 || !parameters->options().output_is_position_independent()) | |
3374 | return 16; | |
3375 | return 32; | |
3376 | } | |
3377 | ||
3378 | // Write out stubs. | |
cf43a2fe AM |
3379 | void |
3380 | do_write(Output_file*); | |
3381 | ||
ec661b9d AM |
3382 | // Plt call stub keys. |
3383 | class Plt_stub_ent | |
cf43a2fe | 3384 | { |
d1a8cabd | 3385 | public: |
ec661b9d | 3386 | Plt_stub_ent(const Symbol* sym) |
c9824451 AM |
3387 | : sym_(sym), object_(0), addend_(0), locsym_(0) |
3388 | { } | |
3389 | ||
ec661b9d AM |
3390 | Plt_stub_ent(const Sized_relobj_file<size, big_endian>* object, |
3391 | unsigned int locsym_index) | |
c9824451 AM |
3392 | : sym_(NULL), object_(object), addend_(0), locsym_(locsym_index) |
3393 | { } | |
3394 | ||
ec661b9d AM |
3395 | Plt_stub_ent(const Sized_relobj_file<size, big_endian>* object, |
3396 | const Symbol* sym, | |
3397 | unsigned int r_type, | |
3398 | Address addend) | |
e5d5f5ed | 3399 | : sym_(sym), object_(0), addend_(0), locsym_(0) |
cf43a2fe AM |
3400 | { |
3401 | if (size != 32) | |
ec661b9d | 3402 | this->addend_ = addend; |
d1a8cabd | 3403 | else if (parameters->options().output_is_position_independent() |
ec661b9d | 3404 | && r_type == elfcpp::R_PPC_PLTREL24) |
cf43a2fe | 3405 | { |
ec661b9d | 3406 | this->addend_ = addend; |
e5d5f5ed | 3407 | if (this->addend_ >= 32768) |
d1a8cabd | 3408 | this->object_ = object; |
cf43a2fe AM |
3409 | } |
3410 | } | |
3411 | ||
ec661b9d AM |
3412 | Plt_stub_ent(const Sized_relobj_file<size, big_endian>* object, |
3413 | unsigned int locsym_index, | |
3414 | unsigned int r_type, | |
3415 | Address addend) | |
e5d5f5ed AM |
3416 | : sym_(NULL), object_(object), addend_(0), locsym_(locsym_index) |
3417 | { | |
3418 | if (size != 32) | |
ec661b9d | 3419 | this->addend_ = addend; |
e5d5f5ed | 3420 | else if (parameters->options().output_is_position_independent() |
ec661b9d AM |
3421 | && r_type == elfcpp::R_PPC_PLTREL24) |
3422 | this->addend_ = addend; | |
e5d5f5ed AM |
3423 | } |
3424 | ||
ec661b9d | 3425 | bool operator==(const Plt_stub_ent& that) const |
cf43a2fe AM |
3426 | { |
3427 | return (this->sym_ == that.sym_ | |
3428 | && this->object_ == that.object_ | |
e5d5f5ed AM |
3429 | && this->addend_ == that.addend_ |
3430 | && this->locsym_ == that.locsym_); | |
cf43a2fe | 3431 | } |
c9269dff AM |
3432 | |
3433 | const Symbol* sym_; | |
e5d5f5ed AM |
3434 | const Sized_relobj_file<size, big_endian>* object_; |
3435 | typename elfcpp::Elf_types<size>::Elf_Addr addend_; | |
3436 | unsigned int locsym_; | |
cf43a2fe AM |
3437 | }; |
3438 | ||
ec661b9d | 3439 | class Plt_stub_ent_hash |
cf43a2fe | 3440 | { |
d1a8cabd | 3441 | public: |
ec661b9d | 3442 | size_t operator()(const Plt_stub_ent& ent) const |
cf43a2fe AM |
3443 | { |
3444 | return (reinterpret_cast<uintptr_t>(ent.sym_) | |
3445 | ^ reinterpret_cast<uintptr_t>(ent.object_) | |
e5d5f5ed AM |
3446 | ^ ent.addend_ |
3447 | ^ ent.locsym_); | |
cf43a2fe | 3448 | } |
ec661b9d AM |
3449 | }; |
3450 | ||
3451 | // Long branch stub keys. | |
3452 | class Branch_stub_ent | |
3453 | { | |
3454 | public: | |
3455 | Branch_stub_ent(const Powerpc_relobj<size, big_endian>* obj, Address to) | |
3456 | : dest_(to), toc_base_off_(0) | |
3457 | { | |
3458 | if (size == 64) | |
3459 | toc_base_off_ = obj->toc_base_offset(); | |
3460 | } | |
3461 | ||
3462 | bool operator==(const Branch_stub_ent& that) const | |
3463 | { | |
3464 | return (this->dest_ == that.dest_ | |
3465 | && (size == 32 | |
3466 | || this->toc_base_off_ == that.toc_base_off_)); | |
3467 | } | |
cf43a2fe | 3468 | |
ec661b9d AM |
3469 | Address dest_; |
3470 | unsigned int toc_base_off_; | |
3471 | }; | |
cf43a2fe | 3472 | |
ec661b9d AM |
3473 | class Branch_stub_ent_hash |
3474 | { | |
3475 | public: | |
3476 | size_t operator()(const Branch_stub_ent& ent) const | |
3477 | { return ent.dest_ ^ ent.toc_base_off_; } | |
3478 | }; | |
cf43a2fe | 3479 | |
ec661b9d | 3480 | // In a sane world this would be a global. |
cf43a2fe | 3481 | Target_powerpc<size, big_endian>* targ_; |
ec661b9d | 3482 | // Map sym/object/addend to stub offset. |
ec661b9d AM |
3483 | Plt_stub_entries plt_call_stubs_; |
3484 | // Map destination address to stub offset. | |
3485 | typedef Unordered_map<Branch_stub_ent, unsigned int, | |
3486 | Branch_stub_ent_hash> Branch_stub_entries; | |
3487 | Branch_stub_entries long_branch_stubs_; | |
3488 | // size of input section | |
3489 | section_size_type orig_data_size_; | |
3490 | // size of stubs | |
9e69ed50 | 3491 | section_size_type plt_size_, last_plt_size_, branch_size_, last_branch_size_; |
9d5781f8 AM |
3492 | // Whether .eh_frame info has been created for this stub section. |
3493 | bool eh_frame_added_; | |
cf43a2fe AM |
3494 | }; |
3495 | ||
ec661b9d AM |
3496 | // Make a new stub table, and record. |
3497 | ||
3498 | template<int size, bool big_endian> | |
3499 | Stub_table<size, big_endian>* | |
3500 | Target_powerpc<size, big_endian>::new_stub_table() | |
3501 | { | |
3502 | Stub_table<size, big_endian>* stub_table | |
3503 | = new Stub_table<size, big_endian>(this); | |
3504 | this->stub_tables_.push_back(stub_table); | |
3505 | return stub_table; | |
3506 | } | |
3507 | ||
3508 | // Delayed stub table initialisation, because we create the stub table | |
3509 | // before we know to which section it will be attached. | |
cf43a2fe AM |
3510 | |
3511 | template<int size, bool big_endian> | |
ec661b9d AM |
3512 | void |
3513 | Stub_table<size, big_endian>::init( | |
3514 | const Output_section::Input_section* owner, | |
3515 | Output_section* output_section) | |
cf43a2fe | 3516 | { |
ec661b9d AM |
3517 | this->set_relobj(owner->relobj()); |
3518 | this->set_shndx(owner->shndx()); | |
3519 | this->set_addralign(this->relobj()->section_addralign(this->shndx())); | |
3520 | this->set_output_section(output_section); | |
3521 | this->orig_data_size_ = owner->current_data_size(); | |
3522 | ||
3523 | std::vector<Output_relaxed_input_section*> new_relaxed; | |
3524 | new_relaxed.push_back(this); | |
3525 | output_section->convert_input_sections_to_relaxed_sections(new_relaxed); | |
cf43a2fe AM |
3526 | } |
3527 | ||
ec661b9d | 3528 | // Add a plt call stub, if we do not already have one for this |
d1a8cabd | 3529 | // sym/object/addend combo. |
cf43a2fe AM |
3530 | |
3531 | template<int size, bool big_endian> | |
3532 | void | |
ec661b9d | 3533 | Stub_table<size, big_endian>::add_plt_call_entry( |
c9824451 | 3534 | const Sized_relobj_file<size, big_endian>* object, |
d83ce4e3 | 3535 | const Symbol* gsym, |
ec661b9d AM |
3536 | unsigned int r_type, |
3537 | Address addend) | |
cf43a2fe | 3538 | { |
ec661b9d AM |
3539 | Plt_stub_ent ent(object, gsym, r_type, addend); |
3540 | Address off = this->plt_size_; | |
9e69ed50 AM |
3541 | std::pair<typename Plt_stub_entries::iterator, bool> p |
3542 | = this->plt_call_stubs_.insert(std::make_pair(ent, off)); | |
3543 | if (p.second) | |
3544 | this->plt_size_ = off + this->plt_call_size(p.first); | |
cf43a2fe AM |
3545 | } |
3546 | ||
e5d5f5ed AM |
3547 | template<int size, bool big_endian> |
3548 | void | |
ec661b9d | 3549 | Stub_table<size, big_endian>::add_plt_call_entry( |
c9824451 | 3550 | const Sized_relobj_file<size, big_endian>* object, |
e5d5f5ed | 3551 | unsigned int locsym_index, |
ec661b9d AM |
3552 | unsigned int r_type, |
3553 | Address addend) | |
e5d5f5ed | 3554 | { |
ec661b9d AM |
3555 | Plt_stub_ent ent(object, locsym_index, r_type, addend); |
3556 | Address off = this->plt_size_; | |
9e69ed50 AM |
3557 | std::pair<typename Plt_stub_entries::iterator, bool> p |
3558 | = this->plt_call_stubs_.insert(std::make_pair(ent, off)); | |
3559 | if (p.second) | |
3560 | this->plt_size_ = off + this->plt_call_size(p.first); | |
e5d5f5ed AM |
3561 | } |
3562 | ||
ec661b9d AM |
3563 | // Find a plt call stub. |
3564 | ||
cf43a2fe | 3565 | template<int size, bool big_endian> |
ec5b8187 | 3566 | typename Stub_table<size, big_endian>::Address |
ec661b9d | 3567 | Stub_table<size, big_endian>::find_plt_call_entry( |
c9824451 | 3568 | const Sized_relobj_file<size, big_endian>* object, |
d83ce4e3 | 3569 | const Symbol* gsym, |
ec661b9d AM |
3570 | unsigned int r_type, |
3571 | Address addend) const | |
c9824451 | 3572 | { |
ec661b9d AM |
3573 | Plt_stub_ent ent(object, gsym, r_type, addend); |
3574 | typename Plt_stub_entries::const_iterator p = this->plt_call_stubs_.find(ent); | |
3575 | return p == this->plt_call_stubs_.end() ? invalid_address : p->second; | |
c9824451 AM |
3576 | } |
3577 | ||
3578 | template<int size, bool big_endian> | |
ec5b8187 | 3579 | typename Stub_table<size, big_endian>::Address |
ec661b9d | 3580 | Stub_table<size, big_endian>::find_plt_call_entry(const Symbol* gsym) const |
cf43a2fe | 3581 | { |
ec661b9d AM |
3582 | Plt_stub_ent ent(gsym); |
3583 | typename Plt_stub_entries::const_iterator p = this->plt_call_stubs_.find(ent); | |
3584 | return p == this->plt_call_stubs_.end() ? invalid_address : p->second; | |
cf43a2fe AM |
3585 | } |
3586 | ||
e5d5f5ed | 3587 | template<int size, bool big_endian> |
ec5b8187 | 3588 | typename Stub_table<size, big_endian>::Address |
ec661b9d | 3589 | Stub_table<size, big_endian>::find_plt_call_entry( |
c9824451 | 3590 | const Sized_relobj_file<size, big_endian>* object, |
e5d5f5ed | 3591 | unsigned int locsym_index, |
ec661b9d AM |
3592 | unsigned int r_type, |
3593 | Address addend) const | |
e5d5f5ed | 3594 | { |
ec661b9d AM |
3595 | Plt_stub_ent ent(object, locsym_index, r_type, addend); |
3596 | typename Plt_stub_entries::const_iterator p = this->plt_call_stubs_.find(ent); | |
3597 | return p == this->plt_call_stubs_.end() ? invalid_address : p->second; | |
c9824451 AM |
3598 | } |
3599 | ||
3600 | template<int size, bool big_endian> | |
ec5b8187 | 3601 | typename Stub_table<size, big_endian>::Address |
ec661b9d | 3602 | Stub_table<size, big_endian>::find_plt_call_entry( |
c9824451 AM |
3603 | const Sized_relobj_file<size, big_endian>* object, |
3604 | unsigned int locsym_index) const | |
3605 | { | |
ec661b9d AM |
3606 | Plt_stub_ent ent(object, locsym_index); |
3607 | typename Plt_stub_entries::const_iterator p = this->plt_call_stubs_.find(ent); | |
3608 | return p == this->plt_call_stubs_.end() ? invalid_address : p->second; | |
3609 | } | |
3610 | ||
3611 | // Add a long branch stub if we don't already have one to given | |
3612 | // destination. | |
3613 | ||
3614 | template<int size, bool big_endian> | |
3615 | void | |
3616 | Stub_table<size, big_endian>::add_long_branch_entry( | |
3617 | const Powerpc_relobj<size, big_endian>* object, | |
3618 | Address to) | |
3619 | { | |
3620 | Branch_stub_ent ent(object, to); | |
3621 | Address off = this->branch_size_; | |
3622 | if (this->long_branch_stubs_.insert(std::make_pair(ent, off)).second) | |
3623 | { | |
3624 | unsigned int stub_size = this->branch_stub_size(to); | |
3625 | this->branch_size_ = off + stub_size; | |
3626 | if (size == 64 && stub_size != 4) | |
3627 | this->targ_->add_branch_lookup_table(to); | |
3628 | } | |
3629 | } | |
3630 | ||
3631 | // Find long branch stub. | |
3632 | ||
3633 | template<int size, bool big_endian> | |
ec5b8187 | 3634 | typename Stub_table<size, big_endian>::Address |
ec661b9d AM |
3635 | Stub_table<size, big_endian>::find_long_branch_entry( |
3636 | const Powerpc_relobj<size, big_endian>* object, | |
9d5781f8 | 3637 | Address to) const |
ec661b9d AM |
3638 | { |
3639 | Branch_stub_ent ent(object, to); | |
3640 | typename Branch_stub_entries::const_iterator p | |
3641 | = this->long_branch_stubs_.find(ent); | |
3642 | return p == this->long_branch_stubs_.end() ? invalid_address : p->second; | |
e5d5f5ed AM |
3643 | } |
3644 | ||
ec661b9d AM |
3645 | // A class to handle .glink. |
3646 | ||
3647 | template<int size, bool big_endian> | |
3648 | class Output_data_glink : public Output_section_data | |
3649 | { | |
3650 | public: | |
3651 | static const int pltresolve_size = 16*4; | |
3652 | ||
3653 | Output_data_glink(Target_powerpc<size, big_endian>* targ) | |
3654 | : Output_section_data(16), targ_(targ) | |
3655 | { } | |
3656 | ||
9d5781f8 AM |
3657 | void |
3658 | add_eh_frame(Layout* layout) | |
3659 | { | |
3660 | if (!parameters->options().ld_generated_unwind_info()) | |
3661 | return; | |
3662 | ||
3663 | if (size == 64) | |
3664 | layout->add_eh_frame_for_plt(this, | |
3665 | Eh_cie<64>::eh_frame_cie, | |
3666 | sizeof (Eh_cie<64>::eh_frame_cie), | |
3667 | glink_eh_frame_fde_64, | |
3668 | sizeof (glink_eh_frame_fde_64)); | |
3669 | else | |
3670 | { | |
3671 | // 32-bit .glink can use the default since the CIE return | |
3672 | // address reg, LR, is valid. | |
3673 | layout->add_eh_frame_for_plt(this, | |
3674 | Eh_cie<32>::eh_frame_cie, | |
3675 | sizeof (Eh_cie<32>::eh_frame_cie), | |
3676 | default_fde, | |
3677 | sizeof (default_fde)); | |
3678 | // Except where LR is used in a PIC __glink_PLTresolve. | |
3679 | if (parameters->options().output_is_position_independent()) | |
3680 | layout->add_eh_frame_for_plt(this, | |
3681 | Eh_cie<32>::eh_frame_cie, | |
3682 | sizeof (Eh_cie<32>::eh_frame_cie), | |
3683 | glink_eh_frame_fde_32, | |
3684 | sizeof (glink_eh_frame_fde_32)); | |
3685 | } | |
3686 | } | |
3687 | ||
ec661b9d AM |
3688 | protected: |
3689 | // Write to a map file. | |
3690 | void | |
3691 | do_print_to_mapfile(Mapfile* mapfile) const | |
3692 | { mapfile->print_output_data(this, _("** glink")); } | |
3693 | ||
3694 | private: | |
3695 | void | |
3696 | set_final_data_size(); | |
3697 | ||
3698 | // Write out .glink | |
3699 | void | |
3700 | do_write(Output_file*); | |
3701 | ||
3702 | // Allows access to .got and .plt for do_write. | |
3703 | Target_powerpc<size, big_endian>* targ_; | |
3704 | }; | |
3705 | ||
cf43a2fe AM |
3706 | template<int size, bool big_endian> |
3707 | void | |
3708 | Output_data_glink<size, big_endian>::set_final_data_size() | |
3709 | { | |
ec661b9d AM |
3710 | unsigned int count = this->targ_->plt_entry_count(); |
3711 | section_size_type total = 0; | |
cf43a2fe AM |
3712 | |
3713 | if (count != 0) | |
3714 | { | |
3715 | if (size == 32) | |
3716 | { | |
cf43a2fe AM |
3717 | // space for branch table |
3718 | total += 4 * (count - 1); | |
3719 | ||
3720 | total += -total & 15; | |
3721 | total += this->pltresolve_size; | |
3722 | } | |
3723 | else | |
3724 | { | |
cf43a2fe AM |
3725 | total += this->pltresolve_size; |
3726 | ||
3727 | // space for branch table | |
3728 | total += 8 * count; | |
3729 | if (count > 0x8000) | |
3730 | total += 4 * (count - 0x8000); | |
3731 | } | |
3732 | } | |
3733 | ||
3734 | this->set_data_size(total); | |
3735 | } | |
3736 | ||
ec661b9d | 3737 | // Write out plt and long branch stub code. |
cf43a2fe AM |
3738 | |
3739 | template<int size, bool big_endian> | |
3740 | void | |
ec661b9d | 3741 | Stub_table<size, big_endian>::do_write(Output_file* of) |
cf43a2fe | 3742 | { |
ec661b9d AM |
3743 | if (this->plt_call_stubs_.empty() |
3744 | && this->long_branch_stubs_.empty()) | |
3745 | return; | |
3746 | ||
3747 | const section_size_type start_off = this->offset(); | |
3748 | const section_size_type off = this->stub_offset(); | |
42cacb20 | 3749 | const section_size_type oview_size = |
ec661b9d | 3750 | convert_to_section_size_type(this->data_size() - (off - start_off)); |
cf43a2fe | 3751 | unsigned char* const oview = of->get_output_view(off, oview_size); |
c9269dff | 3752 | unsigned char* p; |
42cacb20 | 3753 | |
cf43a2fe AM |
3754 | if (size == 64) |
3755 | { | |
ec661b9d AM |
3756 | const Output_data_got_powerpc<size, big_endian>* got |
3757 | = this->targ_->got_section(); | |
dd93cd0a | 3758 | Address got_os_addr = got->output_section()->address(); |
c9269dff | 3759 | |
ec661b9d | 3760 | if (!this->plt_call_stubs_.empty()) |
cf43a2fe | 3761 | { |
ec661b9d AM |
3762 | // The base address of the .plt section. |
3763 | Address plt_base = this->targ_->plt_section()->address(); | |
3764 | Address iplt_base = invalid_address; | |
3765 | ||
3766 | // Write out plt call stubs. | |
3767 | typename Plt_stub_entries::const_iterator cs; | |
3768 | for (cs = this->plt_call_stubs_.begin(); | |
3769 | cs != this->plt_call_stubs_.end(); | |
3770 | ++cs) | |
e5d5f5ed | 3771 | { |
91c2b899 AM |
3772 | bool is_iplt; |
3773 | Address pltoff = this->plt_off(cs, &is_iplt); | |
9e69ed50 | 3774 | Address plt_addr = pltoff; |
91c2b899 | 3775 | if (is_iplt) |
ec661b9d AM |
3776 | { |
3777 | if (iplt_base == invalid_address) | |
3778 | iplt_base = this->targ_->iplt_section()->address(); | |
3779 | plt_addr += iplt_base; | |
3780 | } | |
3781 | else | |
3782 | plt_addr += plt_base; | |
3783 | const Powerpc_relobj<size, big_endian>* ppcobj = static_cast | |
3784 | <const Powerpc_relobj<size, big_endian>*>(cs->first.object_); | |
3785 | Address got_addr = got_os_addr + ppcobj->toc_base_offset(); | |
9e69ed50 | 3786 | Address off = plt_addr - got_addr; |
ec661b9d | 3787 | |
9e69ed50 | 3788 | if (off + 0x80008000 > 0xffffffff || (off & 7) != 0) |
ec661b9d AM |
3789 | gold_error(_("%s: linkage table error against `%s'"), |
3790 | cs->first.object_->name().c_str(), | |
3791 | cs->first.sym_->demangled_name().c_str()); | |
3792 | ||
9e69ed50 AM |
3793 | bool static_chain = parameters->options().plt_static_chain(); |
3794 | bool thread_safe = this->targ_->plt_thread_safe(); | |
3795 | bool use_fake_dep = false; | |
3796 | Address cmp_branch_off = 0; | |
3797 | if (thread_safe) | |
3798 | { | |
3799 | unsigned int pltindex | |
3800 | = ((pltoff - this->targ_->first_plt_entry_offset()) | |
3801 | / this->targ_->plt_entry_size()); | |
3802 | Address glinkoff | |
3803 | = (this->targ_->glink_section()->pltresolve_size | |
3804 | + pltindex * 8); | |
3805 | if (pltindex > 32768) | |
3806 | glinkoff += (pltindex - 32768) * 4; | |
3807 | Address to | |
3808 | = this->targ_->glink_section()->address() + glinkoff; | |
3809 | Address from | |
3810 | = (this->stub_address() + cs->second + 24 | |
3811 | + 4 * (ha(off) != 0) | |
3812 | + 4 * (ha(off + 8 + 8 * static_chain) != ha(off)) | |
3813 | + 4 * static_chain); | |
3814 | cmp_branch_off = to - from; | |
3815 | use_fake_dep = cmp_branch_off + (1 << 25) >= (1 << 26); | |
3816 | } | |
3817 | ||
ec661b9d | 3818 | p = oview + cs->second; |
9e69ed50 | 3819 | if (ha(off) != 0) |
ec661b9d | 3820 | { |
ec661b9d | 3821 | write_insn<big_endian>(p, std_2_1 + 40), p += 4; |
9e69ed50 AM |
3822 | write_insn<big_endian>(p, addis_12_2 + ha(off)), p += 4; |
3823 | write_insn<big_endian>(p, ld_11_12 + l(off)), p += 4; | |
3824 | if (ha(off + 8 + 8 * static_chain) != ha(off)) | |
ec661b9d | 3825 | { |
9e69ed50 AM |
3826 | write_insn<big_endian>(p, addi_12_12 + l(off)), p += 4; |
3827 | off = 0; | |
ec661b9d AM |
3828 | } |
3829 | write_insn<big_endian>(p, mtctr_11), p += 4; | |
9e69ed50 AM |
3830 | if (use_fake_dep) |
3831 | { | |
3832 | write_insn<big_endian>(p, xor_11_11_11), p += 4; | |
3833 | write_insn<big_endian>(p, add_12_12_11), p += 4; | |
3834 | } | |
3835 | write_insn<big_endian>(p, ld_2_12 + l(off + 8)), p += 4; | |
3836 | if (static_chain) | |
3837 | write_insn<big_endian>(p, ld_11_12 + l(off + 16)), p += 4; | |
ec661b9d AM |
3838 | } |
3839 | else | |
3840 | { | |
3841 | write_insn<big_endian>(p, std_2_1 + 40), p += 4; | |
91c2b899 | 3842 | write_insn<big_endian>(p, ld_11_2 + l(off)), p += 4; |
9e69ed50 | 3843 | if (ha(off + 8 + 8 * static_chain) != ha(off)) |
ec661b9d | 3844 | { |
9e69ed50 AM |
3845 | write_insn<big_endian>(p, addi_2_2 + l(off)), p += 4; |
3846 | off = 0; | |
ec661b9d AM |
3847 | } |
3848 | write_insn<big_endian>(p, mtctr_11), p += 4; | |
9e69ed50 AM |
3849 | if (use_fake_dep) |
3850 | { | |
3851 | write_insn<big_endian>(p, xor_11_11_11), p += 4; | |
3852 | write_insn<big_endian>(p, add_2_2_11), p += 4; | |
3853 | } | |
3854 | if (static_chain) | |
3855 | write_insn<big_endian>(p, ld_11_2 + l(off + 16)), p += 4; | |
3856 | write_insn<big_endian>(p, ld_2_2 + l(off + 8)), p += 4; | |
ec661b9d | 3857 | } |
9e69ed50 AM |
3858 | if (thread_safe && !use_fake_dep) |
3859 | { | |
3860 | write_insn<big_endian>(p, cmpldi_2_0), p += 4; | |
3861 | write_insn<big_endian>(p, bnectr_p4), p += 4; | |
3862 | write_insn<big_endian>(p, b | (cmp_branch_off & 0x3fffffc)); | |
3863 | } | |
3864 | else | |
3865 | write_insn<big_endian>(p, bctr); | |
e5d5f5ed | 3866 | } |
ec661b9d AM |
3867 | } |
3868 | ||
3869 | // Write out long branch stubs. | |
3870 | typename Branch_stub_entries::const_iterator bs; | |
3871 | for (bs = this->long_branch_stubs_.begin(); | |
3872 | bs != this->long_branch_stubs_.end(); | |
3873 | ++bs) | |
3874 | { | |
3875 | p = oview + this->plt_size_ + bs->second; | |
3876 | Address loc = this->stub_address() + this->plt_size_ + bs->second; | |
3877 | Address delta = bs->first.dest_ - loc; | |
3878 | if (delta + (1 << 25) < 2 << 25) | |
3879 | write_insn<big_endian>(p, b | (delta & 0x3fffffc)); | |
e5d5f5ed | 3880 | else |
cf43a2fe | 3881 | { |
ec661b9d AM |
3882 | Address brlt_addr |
3883 | = this->targ_->find_branch_lookup_table(bs->first.dest_); | |
3884 | gold_assert(brlt_addr != invalid_address); | |
3885 | brlt_addr += this->targ_->brlt_section()->address(); | |
3886 | Address got_addr = got_os_addr + bs->first.toc_base_off_; | |
3887 | Address brltoff = brlt_addr - got_addr; | |
3888 | if (ha(brltoff) == 0) | |
3889 | { | |
3890 | write_insn<big_endian>(p, ld_11_2 + l(brltoff)), p += 4; | |
3891 | } | |
3892 | else | |
cf43a2fe | 3893 | { |
ec661b9d AM |
3894 | write_insn<big_endian>(p, addis_12_2 + ha(brltoff)), p += 4; |
3895 | write_insn<big_endian>(p, ld_11_12 + l(brltoff)), p += 4; | |
cf43a2fe AM |
3896 | } |
3897 | write_insn<big_endian>(p, mtctr_11), p += 4; | |
ec661b9d | 3898 | write_insn<big_endian>(p, bctr); |
cf43a2fe | 3899 | } |
ec661b9d AM |
3900 | } |
3901 | } | |
3902 | else | |
3903 | { | |
3904 | if (!this->plt_call_stubs_.empty()) | |
3905 | { | |
3906 | // The base address of the .plt section. | |
3907 | Address plt_base = this->targ_->plt_section()->address(); | |
3908 | Address iplt_base = invalid_address; | |
3909 | // The address of _GLOBAL_OFFSET_TABLE_. | |
3910 | Address g_o_t = invalid_address; | |
3911 | ||
3912 | // Write out plt call stubs. | |
3913 | typename Plt_stub_entries::const_iterator cs; | |
3914 | for (cs = this->plt_call_stubs_.begin(); | |
3915 | cs != this->plt_call_stubs_.end(); | |
3916 | ++cs) | |
cf43a2fe | 3917 | { |
91c2b899 AM |
3918 | bool is_iplt; |
3919 | Address plt_addr = this->plt_off(cs, &is_iplt); | |
3920 | if (is_iplt) | |
ec661b9d AM |
3921 | { |
3922 | if (iplt_base == invalid_address) | |
3923 | iplt_base = this->targ_->iplt_section()->address(); | |
3924 | plt_addr += iplt_base; | |
3925 | } | |
3926 | else | |
3927 | plt_addr += plt_base; | |
3928 | ||
3929 | p = oview + cs->second; | |
3930 | if (parameters->options().output_is_position_independent()) | |
3931 | { | |
3932 | Address got_addr; | |
3933 | const Powerpc_relobj<size, big_endian>* ppcobj | |
3934 | = (static_cast<const Powerpc_relobj<size, big_endian>*> | |
3935 | (cs->first.object_)); | |
3936 | if (ppcobj != NULL && cs->first.addend_ >= 32768) | |
3937 | { | |
3938 | unsigned int got2 = ppcobj->got2_shndx(); | |
3939 | got_addr = ppcobj->get_output_section_offset(got2); | |
3940 | gold_assert(got_addr != invalid_address); | |
3941 | got_addr += (ppcobj->output_section(got2)->address() | |
3942 | + cs->first.addend_); | |
3943 | } | |
3944 | else | |
3945 | { | |
3946 | if (g_o_t == invalid_address) | |
3947 | { | |
3948 | const Output_data_got_powerpc<size, big_endian>* got | |
3949 | = this->targ_->got_section(); | |
3950 | g_o_t = got->address() + got->g_o_t(); | |
3951 | } | |
3952 | got_addr = g_o_t; | |
3953 | } | |
3954 | ||
9e69ed50 AM |
3955 | Address off = plt_addr - got_addr; |
3956 | if (ha(off) == 0) | |
ec661b9d | 3957 | { |
9e69ed50 | 3958 | write_insn<big_endian>(p + 0, lwz_11_30 + l(off)); |
ec661b9d AM |
3959 | write_insn<big_endian>(p + 4, mtctr_11); |
3960 | write_insn<big_endian>(p + 8, bctr); | |
3961 | } | |
3962 | else | |
3963 | { | |
9e69ed50 AM |
3964 | write_insn<big_endian>(p + 0, addis_11_30 + ha(off)); |
3965 | write_insn<big_endian>(p + 4, lwz_11_11 + l(off)); | |
ec661b9d AM |
3966 | write_insn<big_endian>(p + 8, mtctr_11); |
3967 | write_insn<big_endian>(p + 12, bctr); | |
3968 | } | |
3969 | } | |
3970 | else | |
3971 | { | |
3972 | write_insn<big_endian>(p + 0, lis_11 + ha(plt_addr)); | |
3973 | write_insn<big_endian>(p + 4, lwz_11_11 + l(plt_addr)); | |
3974 | write_insn<big_endian>(p + 8, mtctr_11); | |
3975 | write_insn<big_endian>(p + 12, bctr); | |
3976 | } | |
3977 | } | |
3978 | } | |
3979 | ||
3980 | // Write out long branch stubs. | |
3981 | typename Branch_stub_entries::const_iterator bs; | |
3982 | for (bs = this->long_branch_stubs_.begin(); | |
3983 | bs != this->long_branch_stubs_.end(); | |
3984 | ++bs) | |
3985 | { | |
3986 | p = oview + this->plt_size_ + bs->second; | |
3987 | Address loc = this->stub_address() + this->plt_size_ + bs->second; | |
3988 | Address delta = bs->first.dest_ - loc; | |
3989 | if (delta + (1 << 25) < 2 << 25) | |
3990 | write_insn<big_endian>(p, b | (delta & 0x3fffffc)); | |
3991 | else if (!parameters->options().output_is_position_independent()) | |
3992 | { | |
3993 | write_insn<big_endian>(p + 0, lis_12 + ha(bs->first.dest_)); | |
3994 | write_insn<big_endian>(p + 4, addi_12_12 + l(bs->first.dest_)); | |
3995 | write_insn<big_endian>(p + 8, mtctr_12); | |
3996 | write_insn<big_endian>(p + 12, bctr); | |
3997 | } | |
3998 | else | |
3999 | { | |
4000 | delta -= 8; | |
4001 | write_insn<big_endian>(p + 0, mflr_0); | |
4002 | write_insn<big_endian>(p + 4, bcl_20_31); | |
4003 | write_insn<big_endian>(p + 8, mflr_12); | |
4004 | write_insn<big_endian>(p + 12, addis_12_12 + ha(delta)); | |
4005 | write_insn<big_endian>(p + 16, addi_12_12 + l(delta)); | |
4006 | write_insn<big_endian>(p + 20, mtlr_0); | |
4007 | write_insn<big_endian>(p + 24, mtctr_12); | |
4008 | write_insn<big_endian>(p + 28, bctr); | |
cf43a2fe AM |
4009 | } |
4010 | } | |
ec661b9d AM |
4011 | } |
4012 | } | |
4013 | ||
4014 | // Write out .glink. | |
4015 | ||
4016 | template<int size, bool big_endian> | |
4017 | void | |
4018 | Output_data_glink<size, big_endian>::do_write(Output_file* of) | |
4019 | { | |
4020 | const section_size_type off = this->offset(); | |
4021 | const section_size_type oview_size = | |
4022 | convert_to_section_size_type(this->data_size()); | |
4023 | unsigned char* const oview = of->get_output_view(off, oview_size); | |
4024 | unsigned char* p; | |
4025 | ||
4026 | // The base address of the .plt section. | |
4027 | typedef typename elfcpp::Elf_types<size>::Elf_Addr Address; | |
4028 | Address plt_base = this->targ_->plt_section()->address(); | |
cf43a2fe | 4029 | |
ec661b9d AM |
4030 | if (size == 64) |
4031 | { | |
cf43a2fe | 4032 | // Write pltresolve stub. |
ec661b9d AM |
4033 | p = oview; |
4034 | Address after_bcl = this->address() + 16; | |
dd93cd0a | 4035 | Address pltoff = plt_base - after_bcl; |
cf43a2fe AM |
4036 | |
4037 | elfcpp::Swap<64, big_endian>::writeval(p, pltoff), p += 8; | |
4038 | ||
4039 | write_insn<big_endian>(p, mflr_12), p += 4; | |
4040 | write_insn<big_endian>(p, bcl_20_31), p += 4; | |
4041 | write_insn<big_endian>(p, mflr_11), p += 4; | |
4042 | write_insn<big_endian>(p, ld_2_11 + l(-16)), p += 4; | |
4043 | write_insn<big_endian>(p, mtlr_12), p += 4; | |
4044 | write_insn<big_endian>(p, add_12_2_11), p += 4; | |
4045 | write_insn<big_endian>(p, ld_11_12 + 0), p += 4; | |
4046 | write_insn<big_endian>(p, ld_2_12 + 8), p += 4; | |
4047 | write_insn<big_endian>(p, mtctr_11), p += 4; | |
4048 | write_insn<big_endian>(p, ld_11_12 + 16), p += 4; | |
4049 | write_insn<big_endian>(p, bctr), p += 4; | |
ec661b9d | 4050 | while (p < oview + this->pltresolve_size) |
cf43a2fe AM |
4051 | write_insn<big_endian>(p, nop), p += 4; |
4052 | ||
4053 | // Write lazy link call stubs. | |
4054 | uint32_t indx = 0; | |
4055 | while (p < oview + oview_size) | |
4056 | { | |
4057 | if (indx < 0x8000) | |
4058 | { | |
4059 | write_insn<big_endian>(p, li_0_0 + indx), p += 4; | |
4060 | } | |
4061 | else | |
4062 | { | |
4063 | write_insn<big_endian>(p, lis_0_0 + hi(indx)), p += 4; | |
4064 | write_insn<big_endian>(p, ori_0_0_0 + l(indx)), p += 4; | |
4065 | } | |
ec661b9d | 4066 | uint32_t branch_off = 8 - (p - oview); |
cf43a2fe AM |
4067 | write_insn<big_endian>(p, b + (branch_off & 0x3fffffc)), p += 4; |
4068 | indx++; | |
4069 | } | |
4070 | } | |
4071 | else | |
4072 | { | |
ec661b9d AM |
4073 | const Output_data_got_powerpc<size, big_endian>* got |
4074 | = this->targ_->got_section(); | |
dd93cd0a AM |
4075 | // The address of _GLOBAL_OFFSET_TABLE_. |
4076 | Address g_o_t = got->address() + got->g_o_t(); | |
c9269dff | 4077 | |
cf43a2fe | 4078 | // Write out pltresolve branch table. |
ec661b9d | 4079 | p = oview; |
cf43a2fe | 4080 | unsigned int the_end = oview_size - this->pltresolve_size; |
c9269dff | 4081 | unsigned char* end_p = oview + the_end; |
cf43a2fe AM |
4082 | while (p < end_p - 8 * 4) |
4083 | write_insn<big_endian>(p, b + end_p - p), p += 4; | |
4084 | while (p < end_p) | |
4085 | write_insn<big_endian>(p, nop), p += 4; | |
42cacb20 | 4086 | |
cf43a2fe AM |
4087 | // Write out pltresolve call stub. |
4088 | if (parameters->options().output_is_position_independent()) | |
42cacb20 | 4089 | { |
ec661b9d | 4090 | Address res0_off = 0; |
dd93cd0a AM |
4091 | Address after_bcl_off = the_end + 12; |
4092 | Address bcl_res0 = after_bcl_off - res0_off; | |
cf43a2fe AM |
4093 | |
4094 | write_insn<big_endian>(p + 0, addis_11_11 + ha(bcl_res0)); | |
4095 | write_insn<big_endian>(p + 4, mflr_0); | |
4096 | write_insn<big_endian>(p + 8, bcl_20_31); | |
4097 | write_insn<big_endian>(p + 12, addi_11_11 + l(bcl_res0)); | |
4098 | write_insn<big_endian>(p + 16, mflr_12); | |
4099 | write_insn<big_endian>(p + 20, mtlr_0); | |
4100 | write_insn<big_endian>(p + 24, sub_11_11_12); | |
4101 | ||
dd93cd0a | 4102 | Address got_bcl = g_o_t + 4 - (after_bcl_off + this->address()); |
cf43a2fe AM |
4103 | |
4104 | write_insn<big_endian>(p + 28, addis_12_12 + ha(got_bcl)); | |
4105 | if (ha(got_bcl) == ha(got_bcl + 4)) | |
4106 | { | |
4107 | write_insn<big_endian>(p + 32, lwz_0_12 + l(got_bcl)); | |
4108 | write_insn<big_endian>(p + 36, lwz_12_12 + l(got_bcl + 4)); | |
4109 | } | |
4110 | else | |
4111 | { | |
4112 | write_insn<big_endian>(p + 32, lwzu_0_12 + l(got_bcl)); | |
4113 | write_insn<big_endian>(p + 36, lwz_12_12 + 4); | |
4114 | } | |
4115 | write_insn<big_endian>(p + 40, mtctr_0); | |
4116 | write_insn<big_endian>(p + 44, add_0_11_11); | |
4117 | write_insn<big_endian>(p + 48, add_11_0_11); | |
4118 | write_insn<big_endian>(p + 52, bctr); | |
4119 | write_insn<big_endian>(p + 56, nop); | |
4120 | write_insn<big_endian>(p + 60, nop); | |
42cacb20 | 4121 | } |
cf43a2fe | 4122 | else |
42cacb20 | 4123 | { |
ec661b9d | 4124 | Address res0 = this->address(); |
cf43a2fe AM |
4125 | |
4126 | write_insn<big_endian>(p + 0, lis_12 + ha(g_o_t + 4)); | |
4127 | write_insn<big_endian>(p + 4, addis_11_11 + ha(-res0)); | |
4128 | if (ha(g_o_t + 4) == ha(g_o_t + 8)) | |
4129 | write_insn<big_endian>(p + 8, lwz_0_12 + l(g_o_t + 4)); | |
4130 | else | |
4131 | write_insn<big_endian>(p + 8, lwzu_0_12 + l(g_o_t + 4)); | |
4132 | write_insn<big_endian>(p + 12, addi_11_11 + l(-res0)); | |
4133 | write_insn<big_endian>(p + 16, mtctr_0); | |
4134 | write_insn<big_endian>(p + 20, add_0_11_11); | |
4135 | if (ha(g_o_t + 4) == ha(g_o_t + 8)) | |
4136 | write_insn<big_endian>(p + 24, lwz_12_12 + l(g_o_t + 8)); | |
4137 | else | |
4138 | write_insn<big_endian>(p + 24, lwz_12_12 + 4); | |
4139 | write_insn<big_endian>(p + 28, add_11_0_11); | |
4140 | write_insn<big_endian>(p + 32, bctr); | |
4141 | write_insn<big_endian>(p + 36, nop); | |
4142 | write_insn<big_endian>(p + 40, nop); | |
4143 | write_insn<big_endian>(p + 44, nop); | |
4144 | write_insn<big_endian>(p + 48, nop); | |
4145 | write_insn<big_endian>(p + 52, nop); | |
4146 | write_insn<big_endian>(p + 56, nop); | |
4147 | write_insn<big_endian>(p + 60, nop); | |
42cacb20 | 4148 | } |
cf43a2fe | 4149 | p += 64; |
42cacb20 DE |
4150 | } |
4151 | ||
cf43a2fe AM |
4152 | of->write_output_view(off, oview_size, oview); |
4153 | } | |
4154 | ||
f3a0ed29 AM |
4155 | |
4156 | // A class to handle linker generated save/restore functions. | |
4157 | ||
4158 | template<int size, bool big_endian> | |
4159 | class Output_data_save_res : public Output_section_data_build | |
4160 | { | |
4161 | public: | |
4162 | Output_data_save_res(Symbol_table* symtab); | |
4163 | ||
4164 | protected: | |
4165 | // Write to a map file. | |
4166 | void | |
4167 | do_print_to_mapfile(Mapfile* mapfile) const | |
4168 | { mapfile->print_output_data(this, _("** save/restore")); } | |
4169 | ||
4170 | void | |
4171 | do_write(Output_file*); | |
4172 | ||
4173 | private: | |
4174 | // The maximum size of save/restore contents. | |
4175 | static const unsigned int savres_max = 218*4; | |
4176 | ||
4177 | void | |
4178 | savres_define(Symbol_table* symtab, | |
4179 | const char *name, | |
4180 | unsigned int lo, unsigned int hi, | |
4181 | unsigned char* write_ent(unsigned char*, int), | |
4182 | unsigned char* write_tail(unsigned char*, int)); | |
4183 | ||
4184 | unsigned char *contents_; | |
4185 | }; | |
4186 | ||
4187 | template<bool big_endian> | |
4188 | static unsigned char* | |
4189 | savegpr0(unsigned char* p, int r) | |
4190 | { | |
4191 | uint32_t insn = std_0_1 + (r << 21) + (1 << 16) - (32 - r) * 8; | |
4192 | write_insn<big_endian>(p, insn); | |
4193 | return p + 4; | |
4194 | } | |
4195 | ||
4196 | template<bool big_endian> | |
4197 | static unsigned char* | |
4198 | savegpr0_tail(unsigned char* p, int r) | |
4199 | { | |
4200 | p = savegpr0<big_endian>(p, r); | |
4201 | uint32_t insn = std_0_1 + 16; | |
4202 | write_insn<big_endian>(p, insn); | |
4203 | p = p + 4; | |
4204 | write_insn<big_endian>(p, blr); | |
4205 | return p + 4; | |
4206 | } | |
4207 | ||
4208 | template<bool big_endian> | |
62fe925a | 4209 | static unsigned char* |
f3a0ed29 AM |
4210 | restgpr0(unsigned char* p, int r) |
4211 | { | |
4212 | uint32_t insn = ld_0_1 + (r << 21) + (1 << 16) - (32 - r) * 8; | |
4213 | write_insn<big_endian>(p, insn); | |
4214 | return p + 4; | |
4215 | } | |
4216 | ||
4217 | template<bool big_endian> | |
62fe925a | 4218 | static unsigned char* |
f3a0ed29 AM |
4219 | restgpr0_tail(unsigned char* p, int r) |
4220 | { | |
4221 | uint32_t insn = ld_0_1 + 16; | |
4222 | write_insn<big_endian>(p, insn); | |
4223 | p = p + 4; | |
4224 | p = restgpr0<big_endian>(p, r); | |
4225 | write_insn<big_endian>(p, mtlr_0); | |
4226 | p = p + 4; | |
4227 | if (r == 29) | |
4228 | { | |
4229 | p = restgpr0<big_endian>(p, 30); | |
4230 | p = restgpr0<big_endian>(p, 31); | |
4231 | } | |
4232 | write_insn<big_endian>(p, blr); | |
4233 | return p + 4; | |
4234 | } | |
4235 | ||
4236 | template<bool big_endian> | |
62fe925a | 4237 | static unsigned char* |
f3a0ed29 AM |
4238 | savegpr1(unsigned char* p, int r) |
4239 | { | |
4240 | uint32_t insn = std_0_12 + (r << 21) + (1 << 16) - (32 - r) * 8; | |
4241 | write_insn<big_endian>(p, insn); | |
4242 | return p + 4; | |
4243 | } | |
4244 | ||
4245 | template<bool big_endian> | |
62fe925a | 4246 | static unsigned char* |
f3a0ed29 AM |
4247 | savegpr1_tail(unsigned char* p, int r) |
4248 | { | |
4249 | p = savegpr1<big_endian>(p, r); | |
4250 | write_insn<big_endian>(p, blr); | |
4251 | return p + 4; | |
4252 | } | |
4253 | ||
4254 | template<bool big_endian> | |
62fe925a | 4255 | static unsigned char* |
f3a0ed29 AM |
4256 | restgpr1(unsigned char* p, int r) |
4257 | { | |
4258 | uint32_t insn = ld_0_12 + (r << 21) + (1 << 16) - (32 - r) * 8; | |
4259 | write_insn<big_endian>(p, insn); | |
4260 | return p + 4; | |
4261 | } | |
4262 | ||
4263 | template<bool big_endian> | |
62fe925a | 4264 | static unsigned char* |
f3a0ed29 AM |
4265 | restgpr1_tail(unsigned char* p, int r) |
4266 | { | |
4267 | p = restgpr1<big_endian>(p, r); | |
4268 | write_insn<big_endian>(p, blr); | |
4269 | return p + 4; | |
4270 | } | |
4271 | ||
4272 | template<bool big_endian> | |
62fe925a | 4273 | static unsigned char* |
f3a0ed29 AM |
4274 | savefpr(unsigned char* p, int r) |
4275 | { | |
4276 | uint32_t insn = stfd_0_1 + (r << 21) + (1 << 16) - (32 - r) * 8; | |
4277 | write_insn<big_endian>(p, insn); | |
4278 | return p + 4; | |
4279 | } | |
4280 | ||
4281 | template<bool big_endian> | |
62fe925a | 4282 | static unsigned char* |
f3a0ed29 AM |
4283 | savefpr0_tail(unsigned char* p, int r) |
4284 | { | |
4285 | p = savefpr<big_endian>(p, r); | |
4286 | write_insn<big_endian>(p, std_0_1 + 16); | |
4287 | p = p + 4; | |
4288 | write_insn<big_endian>(p, blr); | |
4289 | return p + 4; | |
4290 | } | |
4291 | ||
4292 | template<bool big_endian> | |
62fe925a | 4293 | static unsigned char* |
f3a0ed29 AM |
4294 | restfpr(unsigned char* p, int r) |
4295 | { | |
4296 | uint32_t insn = lfd_0_1 + (r << 21) + (1 << 16) - (32 - r) * 8; | |
4297 | write_insn<big_endian>(p, insn); | |
4298 | return p + 4; | |
4299 | } | |
4300 | ||
4301 | template<bool big_endian> | |
62fe925a | 4302 | static unsigned char* |
f3a0ed29 AM |
4303 | restfpr0_tail(unsigned char* p, int r) |
4304 | { | |
4305 | write_insn<big_endian>(p, ld_0_1 + 16); | |
4306 | p = p + 4; | |
4307 | p = restfpr<big_endian>(p, r); | |
4308 | write_insn<big_endian>(p, mtlr_0); | |
4309 | p = p + 4; | |
4310 | if (r == 29) | |
4311 | { | |
4312 | p = restfpr<big_endian>(p, 30); | |
4313 | p = restfpr<big_endian>(p, 31); | |
4314 | } | |
4315 | write_insn<big_endian>(p, blr); | |
4316 | return p + 4; | |
4317 | } | |
4318 | ||
4319 | template<bool big_endian> | |
62fe925a | 4320 | static unsigned char* |
f3a0ed29 AM |
4321 | savefpr1_tail(unsigned char* p, int r) |
4322 | { | |
4323 | p = savefpr<big_endian>(p, r); | |
4324 | write_insn<big_endian>(p, blr); | |
4325 | return p + 4; | |
4326 | } | |
4327 | ||
4328 | template<bool big_endian> | |
62fe925a | 4329 | static unsigned char* |
f3a0ed29 AM |
4330 | restfpr1_tail(unsigned char* p, int r) |
4331 | { | |
4332 | p = restfpr<big_endian>(p, r); | |
4333 | write_insn<big_endian>(p, blr); | |
4334 | return p + 4; | |
4335 | } | |
4336 | ||
4337 | template<bool big_endian> | |
62fe925a | 4338 | static unsigned char* |
f3a0ed29 AM |
4339 | savevr(unsigned char* p, int r) |
4340 | { | |
4341 | uint32_t insn = li_12_0 + (1 << 16) - (32 - r) * 16; | |
4342 | write_insn<big_endian>(p, insn); | |
4343 | p = p + 4; | |
4344 | insn = stvx_0_12_0 + (r << 21); | |
4345 | write_insn<big_endian>(p, insn); | |
4346 | return p + 4; | |
4347 | } | |
4348 | ||
4349 | template<bool big_endian> | |
62fe925a | 4350 | static unsigned char* |
f3a0ed29 AM |
4351 | savevr_tail(unsigned char* p, int r) |
4352 | { | |
4353 | p = savevr<big_endian>(p, r); | |
4354 | write_insn<big_endian>(p, blr); | |
4355 | return p + 4; | |
4356 | } | |
4357 | ||
4358 | template<bool big_endian> | |
62fe925a | 4359 | static unsigned char* |
f3a0ed29 AM |
4360 | restvr(unsigned char* p, int r) |
4361 | { | |
4362 | uint32_t insn = li_12_0 + (1 << 16) - (32 - r) * 16; | |
4363 | write_insn<big_endian>(p, insn); | |
4364 | p = p + 4; | |
4365 | insn = lvx_0_12_0 + (r << 21); | |
4366 | write_insn<big_endian>(p, insn); | |
4367 | return p + 4; | |
4368 | } | |
4369 | ||
4370 | template<bool big_endian> | |
62fe925a | 4371 | static unsigned char* |
f3a0ed29 AM |
4372 | restvr_tail(unsigned char* p, int r) |
4373 | { | |
4374 | p = restvr<big_endian>(p, r); | |
4375 | write_insn<big_endian>(p, blr); | |
4376 | return p + 4; | |
4377 | } | |
4378 | ||
4379 | ||
4380 | template<int size, bool big_endian> | |
4381 | Output_data_save_res<size, big_endian>::Output_data_save_res( | |
4382 | Symbol_table* symtab) | |
4383 | : Output_section_data_build(4), | |
4384 | contents_(NULL) | |
4385 | { | |
4386 | this->savres_define(symtab, | |
4387 | "_savegpr0_", 14, 31, | |
4388 | savegpr0<big_endian>, savegpr0_tail<big_endian>); | |
4389 | this->savres_define(symtab, | |
4390 | "_restgpr0_", 14, 29, | |
4391 | restgpr0<big_endian>, restgpr0_tail<big_endian>); | |
4392 | this->savres_define(symtab, | |
4393 | "_restgpr0_", 30, 31, | |
4394 | restgpr0<big_endian>, restgpr0_tail<big_endian>); | |
4395 | this->savres_define(symtab, | |
4396 | "_savegpr1_", 14, 31, | |
4397 | savegpr1<big_endian>, savegpr1_tail<big_endian>); | |
4398 | this->savres_define(symtab, | |
4399 | "_restgpr1_", 14, 31, | |
4400 | restgpr1<big_endian>, restgpr1_tail<big_endian>); | |
4401 | this->savres_define(symtab, | |
4402 | "_savefpr_", 14, 31, | |
4403 | savefpr<big_endian>, savefpr0_tail<big_endian>); | |
4404 | this->savres_define(symtab, | |
4405 | "_restfpr_", 14, 29, | |
4406 | restfpr<big_endian>, restfpr0_tail<big_endian>); | |
4407 | this->savres_define(symtab, | |
4408 | "_restfpr_", 30, 31, | |
4409 | restfpr<big_endian>, restfpr0_tail<big_endian>); | |
4410 | this->savres_define(symtab, | |
4411 | "._savef", 14, 31, | |
4412 | savefpr<big_endian>, savefpr1_tail<big_endian>); | |
4413 | this->savres_define(symtab, | |
4414 | "._restf", 14, 31, | |
4415 | restfpr<big_endian>, restfpr1_tail<big_endian>); | |
4416 | this->savres_define(symtab, | |
4417 | "_savevr_", 20, 31, | |
4418 | savevr<big_endian>, savevr_tail<big_endian>); | |
4419 | this->savres_define(symtab, | |
4420 | "_restvr_", 20, 31, | |
4421 | restvr<big_endian>, restvr_tail<big_endian>); | |
4422 | } | |
4423 | ||
4424 | template<int size, bool big_endian> | |
4425 | void | |
4426 | Output_data_save_res<size, big_endian>::savres_define( | |
4427 | Symbol_table* symtab, | |
4428 | const char *name, | |
4429 | unsigned int lo, unsigned int hi, | |
4430 | unsigned char* write_ent(unsigned char*, int), | |
4431 | unsigned char* write_tail(unsigned char*, int)) | |
4432 | { | |
4433 | size_t len = strlen(name); | |
4434 | bool writing = false; | |
4435 | char sym[16]; | |
4436 | ||
4437 | memcpy(sym, name, len); | |
4438 | sym[len + 2] = 0; | |
4439 | ||
4440 | for (unsigned int i = lo; i <= hi; i++) | |
4441 | { | |
4442 | sym[len + 0] = i / 10 + '0'; | |
4443 | sym[len + 1] = i % 10 + '0'; | |
4444 | Symbol* gsym = symtab->lookup(sym); | |
4445 | bool refd = gsym != NULL && gsym->is_undefined(); | |
4446 | writing = writing || refd; | |
4447 | if (writing) | |
4448 | { | |
4449 | if (this->contents_ == NULL) | |
4450 | this->contents_ = new unsigned char[this->savres_max]; | |
4451 | ||
ec661b9d | 4452 | section_size_type value = this->current_data_size(); |
f3a0ed29 AM |
4453 | unsigned char* p = this->contents_ + value; |
4454 | if (i != hi) | |
4455 | p = write_ent(p, i); | |
4456 | else | |
4457 | p = write_tail(p, i); | |
ec661b9d | 4458 | section_size_type cur_size = p - this->contents_; |
f3a0ed29 AM |
4459 | this->set_current_data_size(cur_size); |
4460 | if (refd) | |
4461 | symtab->define_in_output_data(sym, NULL, Symbol_table::PREDEFINED, | |
4462 | this, value, cur_size - value, | |
4463 | elfcpp::STT_FUNC, elfcpp::STB_GLOBAL, | |
4464 | elfcpp::STV_HIDDEN, 0, false, false); | |
4465 | } | |
4466 | } | |
4467 | } | |
4468 | ||
4469 | // Write out save/restore. | |
4470 | ||
4471 | template<int size, bool big_endian> | |
4472 | void | |
4473 | Output_data_save_res<size, big_endian>::do_write(Output_file* of) | |
4474 | { | |
ec661b9d | 4475 | const section_size_type off = this->offset(); |
f3a0ed29 AM |
4476 | const section_size_type oview_size = |
4477 | convert_to_section_size_type(this->data_size()); | |
4478 | unsigned char* const oview = of->get_output_view(off, oview_size); | |
4479 | memcpy(oview, this->contents_, oview_size); | |
4480 | of->write_output_view(off, oview_size, oview); | |
4481 | } | |
4482 | ||
4483 | ||
cf43a2fe | 4484 | // Create the glink section. |
42cacb20 | 4485 | |
cf43a2fe AM |
4486 | template<int size, bool big_endian> |
4487 | void | |
4488 | Target_powerpc<size, big_endian>::make_glink_section(Layout* layout) | |
4489 | { | |
4490 | if (this->glink_ == NULL) | |
4491 | { | |
4492 | this->glink_ = new Output_data_glink<size, big_endian>(this); | |
9d5781f8 | 4493 | this->glink_->add_eh_frame(layout); |
cf43a2fe AM |
4494 | layout->add_output_section_data(".text", elfcpp::SHT_PROGBITS, |
4495 | elfcpp::SHF_ALLOC | elfcpp::SHF_EXECINSTR, | |
4496 | this->glink_, ORDER_TEXT, false); | |
4497 | } | |
42cacb20 DE |
4498 | } |
4499 | ||
4500 | // Create a PLT entry for a global symbol. | |
4501 | ||
4502 | template<int size, bool big_endian> | |
4503 | void | |
ec661b9d AM |
4504 | Target_powerpc<size, big_endian>::make_plt_entry(Symbol_table* symtab, |
4505 | Layout* layout, | |
4506 | Symbol* gsym) | |
42cacb20 | 4507 | { |
e5d5f5ed AM |
4508 | if (gsym->type() == elfcpp::STT_GNU_IFUNC |
4509 | && gsym->can_use_relative_reloc(false)) | |
4510 | { | |
4511 | if (this->iplt_ == NULL) | |
40b469d7 | 4512 | this->make_iplt_section(symtab, layout); |
03e25981 | 4513 | this->iplt_->add_ifunc_entry(gsym); |
e5d5f5ed AM |
4514 | } |
4515 | else | |
4516 | { | |
4517 | if (this->plt_ == NULL) | |
40b469d7 | 4518 | this->make_plt_section(symtab, layout); |
03e25981 | 4519 | this->plt_->add_entry(gsym); |
e5d5f5ed | 4520 | } |
e5d5f5ed | 4521 | } |
42cacb20 | 4522 | |
e5d5f5ed | 4523 | // Make a PLT entry for a local STT_GNU_IFUNC symbol. |
612a8d3d | 4524 | |
e5d5f5ed AM |
4525 | template<int size, bool big_endian> |
4526 | void | |
4527 | Target_powerpc<size, big_endian>::make_local_ifunc_plt_entry( | |
40b469d7 | 4528 | Symbol_table* symtab, |
e5d5f5ed | 4529 | Layout* layout, |
ec661b9d AM |
4530 | Sized_relobj_file<size, big_endian>* relobj, |
4531 | unsigned int r_sym) | |
e5d5f5ed AM |
4532 | { |
4533 | if (this->iplt_ == NULL) | |
40b469d7 | 4534 | this->make_iplt_section(symtab, layout); |
03e25981 | 4535 | this->iplt_->add_local_ifunc_entry(relobj, r_sym); |
42cacb20 DE |
4536 | } |
4537 | ||
0e70b911 CC |
4538 | // Return the number of entries in the PLT. |
4539 | ||
4540 | template<int size, bool big_endian> | |
4541 | unsigned int | |
4542 | Target_powerpc<size, big_endian>::plt_entry_count() const | |
4543 | { | |
4544 | if (this->plt_ == NULL) | |
4545 | return 0; | |
e5d5f5ed AM |
4546 | unsigned int count = this->plt_->entry_count(); |
4547 | if (this->iplt_ != NULL) | |
4548 | count += this->iplt_->entry_count(); | |
4549 | return count; | |
0e70b911 CC |
4550 | } |
4551 | ||
4552 | // Return the offset of the first non-reserved PLT entry. | |
4553 | ||
4554 | template<int size, bool big_endian> | |
4555 | unsigned int | |
4556 | Target_powerpc<size, big_endian>::first_plt_entry_offset() const | |
4557 | { | |
e5d5f5ed | 4558 | return this->plt_->first_plt_entry_offset(); |
0e70b911 CC |
4559 | } |
4560 | ||
4561 | // Return the size of each PLT entry. | |
4562 | ||
4563 | template<int size, bool big_endian> | |
4564 | unsigned int | |
4565 | Target_powerpc<size, big_endian>::plt_entry_size() const | |
4566 | { | |
4567 | return Output_data_plt_powerpc<size, big_endian>::get_plt_entry_size(); | |
4568 | } | |
4569 | ||
dd93cd0a | 4570 | // Create a GOT entry for local dynamic __tls_get_addr calls. |
42cacb20 DE |
4571 | |
4572 | template<int size, bool big_endian> | |
4573 | unsigned int | |
dd93cd0a | 4574 | Target_powerpc<size, big_endian>::tlsld_got_offset( |
6fa2a40b CC |
4575 | Symbol_table* symtab, |
4576 | Layout* layout, | |
4577 | Sized_relobj_file<size, big_endian>* object) | |
42cacb20 | 4578 | { |
dd93cd0a | 4579 | if (this->tlsld_got_offset_ == -1U) |
42cacb20 DE |
4580 | { |
4581 | gold_assert(symtab != NULL && layout != NULL && object != NULL); | |
4582 | Reloc_section* rela_dyn = this->rela_dyn_section(layout); | |
dd93cd0a AM |
4583 | Output_data_got_powerpc<size, big_endian>* got |
4584 | = this->got_section(symtab, layout); | |
4585 | unsigned int got_offset = got->add_constant_pair(0, 0); | |
42cacb20 DE |
4586 | rela_dyn->add_local(object, 0, elfcpp::R_POWERPC_DTPMOD, got, |
4587 | got_offset, 0); | |
dd93cd0a | 4588 | this->tlsld_got_offset_ = got_offset; |
42cacb20 | 4589 | } |
dd93cd0a | 4590 | return this->tlsld_got_offset_; |
42cacb20 DE |
4591 | } |
4592 | ||
95a2c8d6 RS |
4593 | // Get the Reference_flags for a particular relocation. |
4594 | ||
4595 | template<int size, bool big_endian> | |
4596 | int | |
d83ce4e3 | 4597 | Target_powerpc<size, big_endian>::Scan::get_reference_flags(unsigned int r_type) |
95a2c8d6 RS |
4598 | { |
4599 | switch (r_type) | |
4600 | { | |
4601 | case elfcpp::R_POWERPC_NONE: | |
4602 | case elfcpp::R_POWERPC_GNU_VTINHERIT: | |
4603 | case elfcpp::R_POWERPC_GNU_VTENTRY: | |
4604 | case elfcpp::R_PPC64_TOC: | |
4605 | // No symbol reference. | |
4606 | return 0; | |
4607 | ||
dd93cd0a AM |
4608 | case elfcpp::R_PPC64_ADDR64: |
4609 | case elfcpp::R_PPC64_UADDR64: | |
4610 | case elfcpp::R_POWERPC_ADDR32: | |
4611 | case elfcpp::R_POWERPC_UADDR32: | |
95a2c8d6 | 4612 | case elfcpp::R_POWERPC_ADDR16: |
dd93cd0a | 4613 | case elfcpp::R_POWERPC_UADDR16: |
95a2c8d6 RS |
4614 | case elfcpp::R_POWERPC_ADDR16_LO: |
4615 | case elfcpp::R_POWERPC_ADDR16_HI: | |
4616 | case elfcpp::R_POWERPC_ADDR16_HA: | |
95a2c8d6 RS |
4617 | return Symbol::ABSOLUTE_REF; |
4618 | ||
dd93cd0a AM |
4619 | case elfcpp::R_POWERPC_ADDR24: |
4620 | case elfcpp::R_POWERPC_ADDR14: | |
4621 | case elfcpp::R_POWERPC_ADDR14_BRTAKEN: | |
4622 | case elfcpp::R_POWERPC_ADDR14_BRNTAKEN: | |
4623 | return Symbol::FUNCTION_CALL | Symbol::ABSOLUTE_REF; | |
4624 | ||
e5d5f5ed | 4625 | case elfcpp::R_PPC64_REL64: |
dd93cd0a | 4626 | case elfcpp::R_POWERPC_REL32: |
95a2c8d6 | 4627 | case elfcpp::R_PPC_LOCAL24PC: |
6ce78956 AM |
4628 | case elfcpp::R_POWERPC_REL16: |
4629 | case elfcpp::R_POWERPC_REL16_LO: | |
4630 | case elfcpp::R_POWERPC_REL16_HI: | |
4631 | case elfcpp::R_POWERPC_REL16_HA: | |
95a2c8d6 RS |
4632 | return Symbol::RELATIVE_REF; |
4633 | ||
dd93cd0a | 4634 | case elfcpp::R_POWERPC_REL24: |
95a2c8d6 | 4635 | case elfcpp::R_PPC_PLTREL24: |
dd93cd0a AM |
4636 | case elfcpp::R_POWERPC_REL14: |
4637 | case elfcpp::R_POWERPC_REL14_BRTAKEN: | |
4638 | case elfcpp::R_POWERPC_REL14_BRNTAKEN: | |
95a2c8d6 RS |
4639 | return Symbol::FUNCTION_CALL | Symbol::RELATIVE_REF; |
4640 | ||
4641 | case elfcpp::R_POWERPC_GOT16: | |
4642 | case elfcpp::R_POWERPC_GOT16_LO: | |
4643 | case elfcpp::R_POWERPC_GOT16_HI: | |
4644 | case elfcpp::R_POWERPC_GOT16_HA: | |
e5d5f5ed AM |
4645 | case elfcpp::R_PPC64_GOT16_DS: |
4646 | case elfcpp::R_PPC64_GOT16_LO_DS: | |
95a2c8d6 RS |
4647 | case elfcpp::R_PPC64_TOC16: |
4648 | case elfcpp::R_PPC64_TOC16_LO: | |
4649 | case elfcpp::R_PPC64_TOC16_HI: | |
4650 | case elfcpp::R_PPC64_TOC16_HA: | |
4651 | case elfcpp::R_PPC64_TOC16_DS: | |
4652 | case elfcpp::R_PPC64_TOC16_LO_DS: | |
4653 | // Absolute in GOT. | |
4654 | return Symbol::ABSOLUTE_REF; | |
4655 | ||
4656 | case elfcpp::R_POWERPC_GOT_TPREL16: | |
4657 | case elfcpp::R_POWERPC_TLS: | |
4658 | return Symbol::TLS_REF; | |
4659 | ||
4660 | case elfcpp::R_POWERPC_COPY: | |
4661 | case elfcpp::R_POWERPC_GLOB_DAT: | |
4662 | case elfcpp::R_POWERPC_JMP_SLOT: | |
4663 | case elfcpp::R_POWERPC_RELATIVE: | |
4664 | case elfcpp::R_POWERPC_DTPMOD: | |
4665 | default: | |
4666 | // Not expected. We will give an error later. | |
4667 | return 0; | |
4668 | } | |
4669 | } | |
4670 | ||
42cacb20 DE |
4671 | // Report an unsupported relocation against a local symbol. |
4672 | ||
4673 | template<int size, bool big_endian> | |
4674 | void | |
4675 | Target_powerpc<size, big_endian>::Scan::unsupported_reloc_local( | |
d83ce4e3 AM |
4676 | Sized_relobj_file<size, big_endian>* object, |
4677 | unsigned int r_type) | |
42cacb20 DE |
4678 | { |
4679 | gold_error(_("%s: unsupported reloc %u against local symbol"), | |
4680 | object->name().c_str(), r_type); | |
4681 | } | |
4682 | ||
4683 | // We are about to emit a dynamic relocation of type R_TYPE. If the | |
4684 | // dynamic linker does not support it, issue an error. | |
4685 | ||
4686 | template<int size, bool big_endian> | |
4687 | void | |
4688 | Target_powerpc<size, big_endian>::Scan::check_non_pic(Relobj* object, | |
4689 | unsigned int r_type) | |
4690 | { | |
4691 | gold_assert(r_type != elfcpp::R_POWERPC_NONE); | |
4692 | ||
4693 | // These are the relocation types supported by glibc for both 32-bit | |
4694 | // and 64-bit powerpc. | |
4695 | switch (r_type) | |
4696 | { | |
3ea0a085 | 4697 | case elfcpp::R_POWERPC_NONE: |
42cacb20 DE |
4698 | case elfcpp::R_POWERPC_RELATIVE: |
4699 | case elfcpp::R_POWERPC_GLOB_DAT: | |
4700 | case elfcpp::R_POWERPC_DTPMOD: | |
4701 | case elfcpp::R_POWERPC_DTPREL: | |
4702 | case elfcpp::R_POWERPC_TPREL: | |
4703 | case elfcpp::R_POWERPC_JMP_SLOT: | |
4704 | case elfcpp::R_POWERPC_COPY: | |
3ea0a085 | 4705 | case elfcpp::R_POWERPC_IRELATIVE: |
42cacb20 | 4706 | case elfcpp::R_POWERPC_ADDR32: |
3ea0a085 | 4707 | case elfcpp::R_POWERPC_UADDR32: |
42cacb20 | 4708 | case elfcpp::R_POWERPC_ADDR24: |
3ea0a085 AM |
4709 | case elfcpp::R_POWERPC_ADDR16: |
4710 | case elfcpp::R_POWERPC_UADDR16: | |
4711 | case elfcpp::R_POWERPC_ADDR16_LO: | |
4712 | case elfcpp::R_POWERPC_ADDR16_HI: | |
4713 | case elfcpp::R_POWERPC_ADDR16_HA: | |
4714 | case elfcpp::R_POWERPC_ADDR14: | |
4715 | case elfcpp::R_POWERPC_ADDR14_BRTAKEN: | |
4716 | case elfcpp::R_POWERPC_ADDR14_BRNTAKEN: | |
4717 | case elfcpp::R_POWERPC_REL32: | |
42cacb20 | 4718 | case elfcpp::R_POWERPC_REL24: |
3ea0a085 AM |
4719 | case elfcpp::R_POWERPC_TPREL16: |
4720 | case elfcpp::R_POWERPC_TPREL16_LO: | |
4721 | case elfcpp::R_POWERPC_TPREL16_HI: | |
4722 | case elfcpp::R_POWERPC_TPREL16_HA: | |
42cacb20 DE |
4723 | return; |
4724 | ||
4725 | default: | |
4726 | break; | |
4727 | } | |
4728 | ||
4729 | if (size == 64) | |
4730 | { | |
4731 | switch (r_type) | |
4732 | { | |
4733 | // These are the relocation types supported only on 64-bit. | |
4734 | case elfcpp::R_PPC64_ADDR64: | |
42cacb20 | 4735 | case elfcpp::R_PPC64_UADDR64: |
3ea0a085 | 4736 | case elfcpp::R_PPC64_JMP_IREL: |
42cacb20 | 4737 | case elfcpp::R_PPC64_ADDR16_DS: |
3ea0a085 | 4738 | case elfcpp::R_PPC64_ADDR16_LO_DS: |
42cacb20 DE |
4739 | case elfcpp::R_PPC64_ADDR16_HIGHER: |
4740 | case elfcpp::R_PPC64_ADDR16_HIGHEST: | |
4741 | case elfcpp::R_PPC64_ADDR16_HIGHERA: | |
4742 | case elfcpp::R_PPC64_ADDR16_HIGHESTA: | |
42cacb20 | 4743 | case elfcpp::R_PPC64_REL64: |
3ea0a085 AM |
4744 | case elfcpp::R_POWERPC_ADDR30: |
4745 | case elfcpp::R_PPC64_TPREL16_DS: | |
4746 | case elfcpp::R_PPC64_TPREL16_LO_DS: | |
4747 | case elfcpp::R_PPC64_TPREL16_HIGHER: | |
4748 | case elfcpp::R_PPC64_TPREL16_HIGHEST: | |
4749 | case elfcpp::R_PPC64_TPREL16_HIGHERA: | |
4750 | case elfcpp::R_PPC64_TPREL16_HIGHESTA: | |
42cacb20 DE |
4751 | return; |
4752 | ||
4753 | default: | |
4754 | break; | |
4755 | } | |
4756 | } | |
4757 | else | |
4758 | { | |
4759 | switch (r_type) | |
4760 | { | |
4761 | // These are the relocation types supported only on 32-bit. | |
3ea0a085 AM |
4762 | // ??? glibc ld.so doesn't need to support these. |
4763 | case elfcpp::R_POWERPC_DTPREL16: | |
4764 | case elfcpp::R_POWERPC_DTPREL16_LO: | |
4765 | case elfcpp::R_POWERPC_DTPREL16_HI: | |
4766 | case elfcpp::R_POWERPC_DTPREL16_HA: | |
4767 | return; | |
42cacb20 DE |
4768 | |
4769 | default: | |
4770 | break; | |
4771 | } | |
4772 | } | |
4773 | ||
4774 | // This prevents us from issuing more than one error per reloc | |
4775 | // section. But we can still wind up issuing more than one | |
4776 | // error per object file. | |
4777 | if (this->issued_non_pic_error_) | |
4778 | return; | |
33aea2fd | 4779 | gold_assert(parameters->options().output_is_position_independent()); |
42cacb20 DE |
4780 | object->error(_("requires unsupported dynamic reloc; " |
4781 | "recompile with -fPIC")); | |
4782 | this->issued_non_pic_error_ = true; | |
4783 | return; | |
4784 | } | |
4785 | ||
e5d5f5ed AM |
4786 | // Return whether we need to make a PLT entry for a relocation of the |
4787 | // given type against a STT_GNU_IFUNC symbol. | |
4788 | ||
4789 | template<int size, bool big_endian> | |
4790 | bool | |
4791 | Target_powerpc<size, big_endian>::Scan::reloc_needs_plt_for_ifunc( | |
4792 | Sized_relobj_file<size, big_endian>* object, | |
4793 | unsigned int r_type) | |
4794 | { | |
c9824451 AM |
4795 | // In non-pic code any reference will resolve to the plt call stub |
4796 | // for the ifunc symbol. | |
4797 | if (size == 32 && !parameters->options().output_is_position_independent()) | |
4798 | return true; | |
4799 | ||
e5d5f5ed AM |
4800 | switch (r_type) |
4801 | { | |
4802 | // Word size refs from data sections are OK. | |
4803 | case elfcpp::R_POWERPC_ADDR32: | |
4804 | case elfcpp::R_POWERPC_UADDR32: | |
4805 | if (size == 32) | |
4806 | return true; | |
4807 | break; | |
4808 | ||
4809 | case elfcpp::R_PPC64_ADDR64: | |
4810 | case elfcpp::R_PPC64_UADDR64: | |
4811 | if (size == 64) | |
4812 | return true; | |
4813 | break; | |
4814 | ||
4815 | // GOT refs are good. | |
4816 | case elfcpp::R_POWERPC_GOT16: | |
4817 | case elfcpp::R_POWERPC_GOT16_LO: | |
4818 | case elfcpp::R_POWERPC_GOT16_HI: | |
4819 | case elfcpp::R_POWERPC_GOT16_HA: | |
4820 | case elfcpp::R_PPC64_GOT16_DS: | |
4821 | case elfcpp::R_PPC64_GOT16_LO_DS: | |
4822 | return true; | |
4823 | ||
4824 | // So are function calls. | |
4825 | case elfcpp::R_POWERPC_ADDR24: | |
4826 | case elfcpp::R_POWERPC_ADDR14: | |
4827 | case elfcpp::R_POWERPC_ADDR14_BRTAKEN: | |
4828 | case elfcpp::R_POWERPC_ADDR14_BRNTAKEN: | |
4829 | case elfcpp::R_POWERPC_REL24: | |
4830 | case elfcpp::R_PPC_PLTREL24: | |
4831 | case elfcpp::R_POWERPC_REL14: | |
4832 | case elfcpp::R_POWERPC_REL14_BRTAKEN: | |
4833 | case elfcpp::R_POWERPC_REL14_BRNTAKEN: | |
4834 | return true; | |
4835 | ||
4836 | default: | |
4837 | break; | |
4838 | } | |
4839 | ||
4840 | // Anything else is a problem. | |
4841 | // If we are building a static executable, the libc startup function | |
4842 | // responsible for applying indirect function relocations is going | |
4843 | // to complain about the reloc type. | |
4844 | // If we are building a dynamic executable, we will have a text | |
4845 | // relocation. The dynamic loader will set the text segment | |
4846 | // writable and non-executable to apply text relocations. So we'll | |
4847 | // segfault when trying to run the indirection function to resolve | |
4848 | // the reloc. | |
4849 | gold_error(_("%s: unsupported reloc %u for IFUNC symbol"), | |
4850 | object->name().c_str(), r_type); | |
4851 | return false; | |
4852 | } | |
4853 | ||
42cacb20 DE |
4854 | // Scan a relocation for a local symbol. |
4855 | ||
4856 | template<int size, bool big_endian> | |
4857 | inline void | |
4858 | Target_powerpc<size, big_endian>::Scan::local( | |
d83ce4e3 AM |
4859 | Symbol_table* symtab, |
4860 | Layout* layout, | |
4861 | Target_powerpc<size, big_endian>* target, | |
4862 | Sized_relobj_file<size, big_endian>* object, | |
4863 | unsigned int data_shndx, | |
4864 | Output_section* output_section, | |
4865 | const elfcpp::Rela<size, big_endian>& reloc, | |
4866 | unsigned int r_type, | |
e5d5f5ed | 4867 | const elfcpp::Sym<size, big_endian>& lsym, |
bfdfa4cd | 4868 | bool is_discarded) |
42cacb20 | 4869 | { |
e3deeb9c AM |
4870 | this->maybe_skip_tls_get_addr_call(r_type, NULL); |
4871 | ||
4872 | if ((size == 64 && r_type == elfcpp::R_PPC64_TLSGD) | |
4873 | || (size == 32 && r_type == elfcpp::R_PPC_TLSGD)) | |
4874 | { | |
4875 | this->expect_tls_get_addr_call(); | |
4876 | const tls::Tls_optimization tls_type = target->optimize_tls_gd(true); | |
4877 | if (tls_type != tls::TLSOPT_NONE) | |
4878 | this->skip_next_tls_get_addr_call(); | |
4879 | } | |
4880 | else if ((size == 64 && r_type == elfcpp::R_PPC64_TLSLD) | |
4881 | || (size == 32 && r_type == elfcpp::R_PPC_TLSLD)) | |
4882 | { | |
4883 | this->expect_tls_get_addr_call(); | |
4884 | const tls::Tls_optimization tls_type = target->optimize_tls_ld(); | |
4885 | if (tls_type != tls::TLSOPT_NONE) | |
4886 | this->skip_next_tls_get_addr_call(); | |
4887 | } | |
4888 | ||
dd93cd0a AM |
4889 | Powerpc_relobj<size, big_endian>* ppc_object |
4890 | = static_cast<Powerpc_relobj<size, big_endian>*>(object); | |
4891 | ||
bfdfa4cd AM |
4892 | if (is_discarded) |
4893 | { | |
4894 | if (size == 64 | |
4895 | && data_shndx == ppc_object->opd_shndx() | |
4896 | && r_type == elfcpp::R_PPC64_ADDR64) | |
4897 | ppc_object->set_opd_discard(reloc.get_r_offset()); | |
4898 | return; | |
4899 | } | |
4900 | ||
e5d5f5ed AM |
4901 | // A local STT_GNU_IFUNC symbol may require a PLT entry. |
4902 | bool is_ifunc = lsym.get_st_type() == elfcpp::STT_GNU_IFUNC; | |
4903 | if (is_ifunc && this->reloc_needs_plt_for_ifunc(object, r_type)) | |
40b469d7 | 4904 | { |
ec661b9d AM |
4905 | unsigned int r_sym = elfcpp::elf_r_sym<size>(reloc.get_r_info()); |
4906 | target->push_branch(ppc_object, data_shndx, reloc.get_r_offset(), | |
4907 | r_type, r_sym, reloc.get_r_addend()); | |
4908 | target->make_local_ifunc_plt_entry(symtab, layout, object, r_sym); | |
40b469d7 | 4909 | } |
e5d5f5ed | 4910 | |
42cacb20 DE |
4911 | switch (r_type) |
4912 | { | |
4913 | case elfcpp::R_POWERPC_NONE: | |
4914 | case elfcpp::R_POWERPC_GNU_VTINHERIT: | |
4915 | case elfcpp::R_POWERPC_GNU_VTENTRY: | |
6ce78956 | 4916 | case elfcpp::R_PPC64_TOCSAVE: |
dd93cd0a | 4917 | case elfcpp::R_PPC_EMB_MRKREF: |
7404fe1b | 4918 | case elfcpp::R_POWERPC_TLS: |
dd93cd0a AM |
4919 | break; |
4920 | ||
4921 | case elfcpp::R_PPC64_TOC: | |
4922 | { | |
4923 | Output_data_got_powerpc<size, big_endian>* got | |
4924 | = target->got_section(symtab, layout); | |
4925 | if (parameters->options().output_is_position_independent()) | |
4926 | { | |
bfdfa4cd AM |
4927 | Address off = reloc.get_r_offset(); |
4928 | if (size == 64 | |
4929 | && data_shndx == ppc_object->opd_shndx() | |
4930 | && ppc_object->get_opd_discard(off - 8)) | |
4931 | break; | |
4932 | ||
dd93cd0a | 4933 | Reloc_section* rela_dyn = target->rela_dyn_section(layout); |
bfdfa4cd | 4934 | Powerpc_relobj<size, big_endian>* symobj = ppc_object; |
dd93cd0a AM |
4935 | rela_dyn->add_output_section_relative(got->output_section(), |
4936 | elfcpp::R_POWERPC_RELATIVE, | |
4937 | output_section, | |
bfdfa4cd AM |
4938 | object, data_shndx, off, |
4939 | symobj->toc_base_offset()); | |
dd93cd0a AM |
4940 | } |
4941 | } | |
42cacb20 DE |
4942 | break; |
4943 | ||
4944 | case elfcpp::R_PPC64_ADDR64: | |
dd93cd0a | 4945 | case elfcpp::R_PPC64_UADDR64: |
42cacb20 | 4946 | case elfcpp::R_POWERPC_ADDR32: |
dd93cd0a AM |
4947 | case elfcpp::R_POWERPC_UADDR32: |
4948 | case elfcpp::R_POWERPC_ADDR24: | |
c9269dff | 4949 | case elfcpp::R_POWERPC_ADDR16: |
42cacb20 | 4950 | case elfcpp::R_POWERPC_ADDR16_LO: |
c9269dff AM |
4951 | case elfcpp::R_POWERPC_ADDR16_HI: |
4952 | case elfcpp::R_POWERPC_ADDR16_HA: | |
dd93cd0a AM |
4953 | case elfcpp::R_POWERPC_UADDR16: |
4954 | case elfcpp::R_PPC64_ADDR16_HIGHER: | |
4955 | case elfcpp::R_PPC64_ADDR16_HIGHERA: | |
4956 | case elfcpp::R_PPC64_ADDR16_HIGHEST: | |
4957 | case elfcpp::R_PPC64_ADDR16_HIGHESTA: | |
4958 | case elfcpp::R_PPC64_ADDR16_DS: | |
4959 | case elfcpp::R_PPC64_ADDR16_LO_DS: | |
4960 | case elfcpp::R_POWERPC_ADDR14: | |
4961 | case elfcpp::R_POWERPC_ADDR14_BRTAKEN: | |
4962 | case elfcpp::R_POWERPC_ADDR14_BRNTAKEN: | |
42cacb20 DE |
4963 | // If building a shared library (or a position-independent |
4964 | // executable), we need to create a dynamic relocation for | |
4965 | // this location. | |
c9824451 AM |
4966 | if (parameters->options().output_is_position_independent() |
4967 | || (size == 64 && is_ifunc)) | |
2e702c99 RM |
4968 | { |
4969 | Reloc_section* rela_dyn = target->rela_dyn_section(layout); | |
42cacb20 | 4970 | |
dd93cd0a AM |
4971 | if ((size == 32 && r_type == elfcpp::R_POWERPC_ADDR32) |
4972 | || (size == 64 && r_type == elfcpp::R_PPC64_ADDR64)) | |
2e702c99 RM |
4973 | { |
4974 | unsigned int r_sym = elfcpp::elf_r_sym<size>(reloc.get_r_info()); | |
e5d5f5ed AM |
4975 | unsigned int dynrel = elfcpp::R_POWERPC_RELATIVE; |
4976 | if (is_ifunc) | |
4977 | { | |
4978 | rela_dyn = target->iplt_section()->rel_plt(); | |
4979 | dynrel = elfcpp::R_POWERPC_IRELATIVE; | |
4980 | } | |
4981 | rela_dyn->add_local_relative(object, r_sym, dynrel, | |
dd93cd0a AM |
4982 | output_section, data_shndx, |
4983 | reloc.get_r_offset(), | |
c9824451 | 4984 | reloc.get_r_addend(), false); |
2e702c99 RM |
4985 | } |
4986 | else | |
4987 | { | |
dd93cd0a | 4988 | check_non_pic(object, r_type); |
42cacb20 | 4989 | unsigned int r_sym = elfcpp::elf_r_sym<size>(reloc.get_r_info()); |
dd93cd0a AM |
4990 | rela_dyn->add_local(object, r_sym, r_type, output_section, |
4991 | data_shndx, reloc.get_r_offset(), | |
4992 | reloc.get_r_addend()); | |
2e702c99 RM |
4993 | } |
4994 | } | |
42cacb20 DE |
4995 | break; |
4996 | ||
4997 | case elfcpp::R_POWERPC_REL24: | |
c9824451 | 4998 | case elfcpp::R_PPC_PLTREL24: |
42cacb20 | 4999 | case elfcpp::R_PPC_LOCAL24PC: |
ec661b9d AM |
5000 | target->push_branch(ppc_object, data_shndx, reloc.get_r_offset(), |
5001 | r_type, elfcpp::elf_r_sym<size>(reloc.get_r_info()), | |
5002 | reloc.get_r_addend()); | |
5003 | break; | |
5004 | ||
5005 | case elfcpp::R_POWERPC_REL14: | |
5006 | case elfcpp::R_POWERPC_REL14_BRTAKEN: | |
5007 | case elfcpp::R_POWERPC_REL14_BRNTAKEN: | |
5008 | target->push_branch(ppc_object, data_shndx, reloc.get_r_offset(), | |
5009 | r_type, elfcpp::elf_r_sym<size>(reloc.get_r_info()), | |
5010 | reloc.get_r_addend()); | |
5011 | break; | |
5012 | ||
5013 | case elfcpp::R_PPC64_REL64: | |
5014 | case elfcpp::R_POWERPC_REL32: | |
dd93cd0a | 5015 | case elfcpp::R_POWERPC_REL16: |
6ce78956 | 5016 | case elfcpp::R_POWERPC_REL16_LO: |
dd93cd0a | 5017 | case elfcpp::R_POWERPC_REL16_HI: |
6ce78956 | 5018 | case elfcpp::R_POWERPC_REL16_HA: |
dd93cd0a AM |
5019 | case elfcpp::R_POWERPC_SECTOFF: |
5020 | case elfcpp::R_POWERPC_TPREL16: | |
5021 | case elfcpp::R_POWERPC_DTPREL16: | |
5022 | case elfcpp::R_POWERPC_SECTOFF_LO: | |
5023 | case elfcpp::R_POWERPC_TPREL16_LO: | |
5024 | case elfcpp::R_POWERPC_DTPREL16_LO: | |
5025 | case elfcpp::R_POWERPC_SECTOFF_HI: | |
5026 | case elfcpp::R_POWERPC_TPREL16_HI: | |
5027 | case elfcpp::R_POWERPC_DTPREL16_HI: | |
5028 | case elfcpp::R_POWERPC_SECTOFF_HA: | |
5029 | case elfcpp::R_POWERPC_TPREL16_HA: | |
5030 | case elfcpp::R_POWERPC_DTPREL16_HA: | |
5031 | case elfcpp::R_PPC64_DTPREL16_HIGHER: | |
5032 | case elfcpp::R_PPC64_TPREL16_HIGHER: | |
5033 | case elfcpp::R_PPC64_DTPREL16_HIGHERA: | |
5034 | case elfcpp::R_PPC64_TPREL16_HIGHERA: | |
5035 | case elfcpp::R_PPC64_DTPREL16_HIGHEST: | |
5036 | case elfcpp::R_PPC64_TPREL16_HIGHEST: | |
5037 | case elfcpp::R_PPC64_DTPREL16_HIGHESTA: | |
5038 | case elfcpp::R_PPC64_TPREL16_HIGHESTA: | |
5039 | case elfcpp::R_PPC64_TPREL16_DS: | |
5040 | case elfcpp::R_PPC64_TPREL16_LO_DS: | |
5041 | case elfcpp::R_PPC64_DTPREL16_DS: | |
5042 | case elfcpp::R_PPC64_DTPREL16_LO_DS: | |
5043 | case elfcpp::R_PPC64_SECTOFF_DS: | |
5044 | case elfcpp::R_PPC64_SECTOFF_LO_DS: | |
5045 | case elfcpp::R_PPC64_TLSGD: | |
5046 | case elfcpp::R_PPC64_TLSLD: | |
42cacb20 DE |
5047 | break; |
5048 | ||
5049 | case elfcpp::R_POWERPC_GOT16: | |
5050 | case elfcpp::R_POWERPC_GOT16_LO: | |
5051 | case elfcpp::R_POWERPC_GOT16_HI: | |
5052 | case elfcpp::R_POWERPC_GOT16_HA: | |
dd93cd0a AM |
5053 | case elfcpp::R_PPC64_GOT16_DS: |
5054 | case elfcpp::R_PPC64_GOT16_LO_DS: | |
42cacb20 | 5055 | { |
c9269dff | 5056 | // The symbol requires a GOT entry. |
dd93cd0a AM |
5057 | Output_data_got_powerpc<size, big_endian>* got |
5058 | = target->got_section(symtab, layout); | |
5059 | unsigned int r_sym = elfcpp::elf_r_sym<size>(reloc.get_r_info()); | |
42cacb20 | 5060 | |
e5d5f5ed | 5061 | if (!parameters->options().output_is_position_independent()) |
42cacb20 | 5062 | { |
e5d5f5ed AM |
5063 | if (size == 32 && is_ifunc) |
5064 | got->add_local_plt(object, r_sym, GOT_TYPE_STANDARD); | |
5065 | else | |
5066 | got->add_local(object, r_sym, GOT_TYPE_STANDARD); | |
5067 | } | |
5068 | else if (!object->local_has_got_offset(r_sym, GOT_TYPE_STANDARD)) | |
5069 | { | |
5070 | // If we are generating a shared object or a pie, this | |
5071 | // symbol's GOT entry will be set by a dynamic relocation. | |
5072 | unsigned int off; | |
5073 | off = got->add_constant(0); | |
5074 | object->set_local_got_offset(r_sym, GOT_TYPE_STANDARD, off); | |
42cacb20 | 5075 | |
e5d5f5ed AM |
5076 | Reloc_section* rela_dyn = target->rela_dyn_section(layout); |
5077 | unsigned int dynrel = elfcpp::R_POWERPC_RELATIVE; | |
5078 | if (is_ifunc) | |
5079 | { | |
5080 | rela_dyn = target->iplt_section()->rel_plt(); | |
5081 | dynrel = elfcpp::R_POWERPC_IRELATIVE; | |
42cacb20 | 5082 | } |
e5d5f5ed | 5083 | rela_dyn->add_local_relative(object, r_sym, dynrel, |
c9824451 | 5084 | got, off, 0, false); |
2e702c99 | 5085 | } |
42cacb20 DE |
5086 | } |
5087 | break; | |
5088 | ||
cf43a2fe AM |
5089 | case elfcpp::R_PPC64_TOC16: |
5090 | case elfcpp::R_PPC64_TOC16_LO: | |
5091 | case elfcpp::R_PPC64_TOC16_HI: | |
5092 | case elfcpp::R_PPC64_TOC16_HA: | |
5093 | case elfcpp::R_PPC64_TOC16_DS: | |
5094 | case elfcpp::R_PPC64_TOC16_LO_DS: | |
42cacb20 DE |
5095 | // We need a GOT section. |
5096 | target->got_section(symtab, layout); | |
5097 | break; | |
5098 | ||
dd93cd0a AM |
5099 | case elfcpp::R_POWERPC_GOT_TLSGD16: |
5100 | case elfcpp::R_POWERPC_GOT_TLSGD16_LO: | |
5101 | case elfcpp::R_POWERPC_GOT_TLSGD16_HI: | |
5102 | case elfcpp::R_POWERPC_GOT_TLSGD16_HA: | |
5103 | { | |
5104 | const tls::Tls_optimization tls_type = target->optimize_tls_gd(true); | |
5105 | if (tls_type == tls::TLSOPT_NONE) | |
5106 | { | |
5107 | Output_data_got_powerpc<size, big_endian>* got | |
5108 | = target->got_section(symtab, layout); | |
5109 | unsigned int r_sym = elfcpp::elf_r_sym<size>(reloc.get_r_info()); | |
bd73a62d AM |
5110 | Reloc_section* rela_dyn = target->rela_dyn_section(layout); |
5111 | got->add_local_tls_pair(object, r_sym, GOT_TYPE_TLSGD, | |
5112 | rela_dyn, elfcpp::R_POWERPC_DTPMOD); | |
dd93cd0a AM |
5113 | } |
5114 | else if (tls_type == tls::TLSOPT_TO_LE) | |
5115 | { | |
5116 | // no GOT relocs needed for Local Exec. | |
5117 | } | |
5118 | else | |
5119 | gold_unreachable(); | |
5120 | } | |
42cacb20 DE |
5121 | break; |
5122 | ||
dd93cd0a AM |
5123 | case elfcpp::R_POWERPC_GOT_TLSLD16: |
5124 | case elfcpp::R_POWERPC_GOT_TLSLD16_LO: | |
5125 | case elfcpp::R_POWERPC_GOT_TLSLD16_HI: | |
5126 | case elfcpp::R_POWERPC_GOT_TLSLD16_HA: | |
5127 | { | |
5128 | const tls::Tls_optimization tls_type = target->optimize_tls_ld(); | |
5129 | if (tls_type == tls::TLSOPT_NONE) | |
5130 | target->tlsld_got_offset(symtab, layout, object); | |
5131 | else if (tls_type == tls::TLSOPT_TO_LE) | |
5132 | { | |
5133 | // no GOT relocs needed for Local Exec. | |
7404fe1b AM |
5134 | if (parameters->options().emit_relocs()) |
5135 | { | |
5136 | Output_section* os = layout->tls_segment()->first_section(); | |
5137 | gold_assert(os != NULL); | |
5138 | os->set_needs_symtab_index(); | |
5139 | } | |
dd93cd0a AM |
5140 | } |
5141 | else | |
5142 | gold_unreachable(); | |
5143 | } | |
42cacb20 | 5144 | break; |
42cacb20 | 5145 | |
dd93cd0a AM |
5146 | case elfcpp::R_POWERPC_GOT_DTPREL16: |
5147 | case elfcpp::R_POWERPC_GOT_DTPREL16_LO: | |
5148 | case elfcpp::R_POWERPC_GOT_DTPREL16_HI: | |
5149 | case elfcpp::R_POWERPC_GOT_DTPREL16_HA: | |
5150 | { | |
5151 | Output_data_got_powerpc<size, big_endian>* got | |
5152 | = target->got_section(symtab, layout); | |
5153 | unsigned int r_sym = elfcpp::elf_r_sym<size>(reloc.get_r_info()); | |
bd73a62d | 5154 | got->add_local_tls(object, r_sym, GOT_TYPE_DTPREL); |
dd93cd0a AM |
5155 | } |
5156 | break; | |
42cacb20 | 5157 | |
dd93cd0a AM |
5158 | case elfcpp::R_POWERPC_GOT_TPREL16: |
5159 | case elfcpp::R_POWERPC_GOT_TPREL16_LO: | |
5160 | case elfcpp::R_POWERPC_GOT_TPREL16_HI: | |
5161 | case elfcpp::R_POWERPC_GOT_TPREL16_HA: | |
5162 | { | |
5163 | const tls::Tls_optimization tls_type = target->optimize_tls_ie(true); | |
5164 | if (tls_type == tls::TLSOPT_NONE) | |
5165 | { | |
dd93cd0a | 5166 | unsigned int r_sym = elfcpp::elf_r_sym<size>(reloc.get_r_info()); |
acc276d8 AM |
5167 | if (!object->local_has_got_offset(r_sym, GOT_TYPE_TPREL)) |
5168 | { | |
5169 | Output_data_got_powerpc<size, big_endian>* got | |
5170 | = target->got_section(symtab, layout); | |
5171 | unsigned int off = got->add_constant(0); | |
5172 | object->set_local_got_offset(r_sym, GOT_TYPE_TPREL, off); | |
5173 | ||
5174 | Reloc_section* rela_dyn = target->rela_dyn_section(layout); | |
5175 | rela_dyn->add_symbolless_local_addend(object, r_sym, | |
5176 | elfcpp::R_POWERPC_TPREL, | |
5177 | got, off, 0); | |
5178 | } | |
dd93cd0a AM |
5179 | } |
5180 | else if (tls_type == tls::TLSOPT_TO_LE) | |
5181 | { | |
5182 | // no GOT relocs needed for Local Exec. | |
5183 | } | |
5184 | else | |
5185 | gold_unreachable(); | |
5186 | } | |
5187 | break; | |
5188 | ||
5189 | default: | |
5190 | unsupported_reloc_local(object, r_type); | |
5191 | break; | |
5192 | } | |
d8f5a274 AM |
5193 | |
5194 | switch (r_type) | |
5195 | { | |
5196 | case elfcpp::R_POWERPC_GOT_TLSLD16: | |
5197 | case elfcpp::R_POWERPC_GOT_TLSGD16: | |
5198 | case elfcpp::R_POWERPC_GOT_TPREL16: | |
5199 | case elfcpp::R_POWERPC_GOT_DTPREL16: | |
5200 | case elfcpp::R_POWERPC_GOT16: | |
5201 | case elfcpp::R_PPC64_GOT16_DS: | |
5202 | case elfcpp::R_PPC64_TOC16: | |
5203 | case elfcpp::R_PPC64_TOC16_DS: | |
5204 | ppc_object->set_has_small_toc_reloc(); | |
5205 | default: | |
5206 | break; | |
5207 | } | |
dd93cd0a AM |
5208 | } |
5209 | ||
5210 | // Report an unsupported relocation against a global symbol. | |
5211 | ||
5212 | template<int size, bool big_endian> | |
5213 | void | |
5214 | Target_powerpc<size, big_endian>::Scan::unsupported_reloc_global( | |
5215 | Sized_relobj_file<size, big_endian>* object, | |
5216 | unsigned int r_type, | |
5217 | Symbol* gsym) | |
5218 | { | |
42cacb20 DE |
5219 | gold_error(_("%s: unsupported reloc %u against global symbol %s"), |
5220 | object->name().c_str(), r_type, gsym->demangled_name().c_str()); | |
5221 | } | |
5222 | ||
5223 | // Scan a relocation for a global symbol. | |
5224 | ||
5225 | template<int size, bool big_endian> | |
5226 | inline void | |
5227 | Target_powerpc<size, big_endian>::Scan::global( | |
d83ce4e3 AM |
5228 | Symbol_table* symtab, |
5229 | Layout* layout, | |
5230 | Target_powerpc<size, big_endian>* target, | |
5231 | Sized_relobj_file<size, big_endian>* object, | |
5232 | unsigned int data_shndx, | |
5233 | Output_section* output_section, | |
5234 | const elfcpp::Rela<size, big_endian>& reloc, | |
5235 | unsigned int r_type, | |
5236 | Symbol* gsym) | |
42cacb20 | 5237 | { |
e3deeb9c AM |
5238 | if (this->maybe_skip_tls_get_addr_call(r_type, gsym) == Track_tls::SKIP) |
5239 | return; | |
5240 | ||
5241 | if ((size == 64 && r_type == elfcpp::R_PPC64_TLSGD) | |
5242 | || (size == 32 && r_type == elfcpp::R_PPC_TLSGD)) | |
5243 | { | |
5244 | this->expect_tls_get_addr_call(); | |
5245 | const bool final = gsym->final_value_is_known(); | |
5246 | const tls::Tls_optimization tls_type = target->optimize_tls_gd(final); | |
5247 | if (tls_type != tls::TLSOPT_NONE) | |
5248 | this->skip_next_tls_get_addr_call(); | |
5249 | } | |
5250 | else if ((size == 64 && r_type == elfcpp::R_PPC64_TLSLD) | |
5251 | || (size == 32 && r_type == elfcpp::R_PPC_TLSLD)) | |
5252 | { | |
5253 | this->expect_tls_get_addr_call(); | |
5254 | const tls::Tls_optimization tls_type = target->optimize_tls_ld(); | |
5255 | if (tls_type != tls::TLSOPT_NONE) | |
5256 | this->skip_next_tls_get_addr_call(); | |
5257 | } | |
5258 | ||
dd93cd0a AM |
5259 | Powerpc_relobj<size, big_endian>* ppc_object |
5260 | = static_cast<Powerpc_relobj<size, big_endian>*>(object); | |
5261 | ||
e5d5f5ed AM |
5262 | // A STT_GNU_IFUNC symbol may require a PLT entry. |
5263 | if (gsym->type() == elfcpp::STT_GNU_IFUNC | |
5264 | && this->reloc_needs_plt_for_ifunc(object, r_type)) | |
ec661b9d AM |
5265 | { |
5266 | target->push_branch(ppc_object, data_shndx, reloc.get_r_offset(), | |
5267 | r_type, elfcpp::elf_r_sym<size>(reloc.get_r_info()), | |
5268 | reloc.get_r_addend()); | |
5269 | target->make_plt_entry(symtab, layout, gsym); | |
5270 | } | |
e5d5f5ed | 5271 | |
42cacb20 DE |
5272 | switch (r_type) |
5273 | { | |
5274 | case elfcpp::R_POWERPC_NONE: | |
5275 | case elfcpp::R_POWERPC_GNU_VTINHERIT: | |
5276 | case elfcpp::R_POWERPC_GNU_VTENTRY: | |
cf43a2fe | 5277 | case elfcpp::R_PPC_LOCAL24PC: |
dd93cd0a | 5278 | case elfcpp::R_PPC_EMB_MRKREF: |
7404fe1b | 5279 | case elfcpp::R_POWERPC_TLS: |
dd93cd0a AM |
5280 | break; |
5281 | ||
5282 | case elfcpp::R_PPC64_TOC: | |
5283 | { | |
5284 | Output_data_got_powerpc<size, big_endian>* got | |
5285 | = target->got_section(symtab, layout); | |
5286 | if (parameters->options().output_is_position_independent()) | |
5287 | { | |
bfdfa4cd AM |
5288 | Address off = reloc.get_r_offset(); |
5289 | if (size == 64 | |
5290 | && data_shndx == ppc_object->opd_shndx() | |
5291 | && ppc_object->get_opd_discard(off - 8)) | |
5292 | break; | |
5293 | ||
dd93cd0a AM |
5294 | Reloc_section* rela_dyn = target->rela_dyn_section(layout); |
5295 | Powerpc_relobj<size, big_endian>* symobj = ppc_object; | |
5296 | if (data_shndx != ppc_object->opd_shndx()) | |
5297 | symobj = static_cast | |
5298 | <Powerpc_relobj<size, big_endian>*>(gsym->object()); | |
5299 | rela_dyn->add_output_section_relative(got->output_section(), | |
5300 | elfcpp::R_POWERPC_RELATIVE, | |
5301 | output_section, | |
bfdfa4cd | 5302 | object, data_shndx, off, |
dd93cd0a AM |
5303 | symobj->toc_base_offset()); |
5304 | } | |
5305 | } | |
42cacb20 DE |
5306 | break; |
5307 | ||
c9269dff | 5308 | case elfcpp::R_PPC64_ADDR64: |
bfdfa4cd AM |
5309 | if (size == 64 |
5310 | && data_shndx == ppc_object->opd_shndx() | |
5311 | && (gsym->is_defined_in_discarded_section() | |
5312 | || gsym->object() != object)) | |
5313 | { | |
5314 | ppc_object->set_opd_discard(reloc.get_r_offset()); | |
5315 | break; | |
5316 | } | |
5317 | // Fall thru | |
dd93cd0a | 5318 | case elfcpp::R_PPC64_UADDR64: |
c9269dff | 5319 | case elfcpp::R_POWERPC_ADDR32: |
dd93cd0a AM |
5320 | case elfcpp::R_POWERPC_UADDR32: |
5321 | case elfcpp::R_POWERPC_ADDR24: | |
42cacb20 DE |
5322 | case elfcpp::R_POWERPC_ADDR16: |
5323 | case elfcpp::R_POWERPC_ADDR16_LO: | |
5324 | case elfcpp::R_POWERPC_ADDR16_HI: | |
5325 | case elfcpp::R_POWERPC_ADDR16_HA: | |
dd93cd0a AM |
5326 | case elfcpp::R_POWERPC_UADDR16: |
5327 | case elfcpp::R_PPC64_ADDR16_HIGHER: | |
5328 | case elfcpp::R_PPC64_ADDR16_HIGHERA: | |
5329 | case elfcpp::R_PPC64_ADDR16_HIGHEST: | |
5330 | case elfcpp::R_PPC64_ADDR16_HIGHESTA: | |
5331 | case elfcpp::R_PPC64_ADDR16_DS: | |
5332 | case elfcpp::R_PPC64_ADDR16_LO_DS: | |
5333 | case elfcpp::R_POWERPC_ADDR14: | |
5334 | case elfcpp::R_POWERPC_ADDR14_BRTAKEN: | |
5335 | case elfcpp::R_POWERPC_ADDR14_BRNTAKEN: | |
42cacb20 | 5336 | { |
c9269dff AM |
5337 | // Make a PLT entry if necessary. |
5338 | if (gsym->needs_plt_entry()) | |
5339 | { | |
ec661b9d AM |
5340 | target->push_branch(ppc_object, data_shndx, reloc.get_r_offset(), |
5341 | r_type, | |
5342 | elfcpp::elf_r_sym<size>(reloc.get_r_info()), | |
5343 | reloc.get_r_addend()); | |
5344 | target->make_plt_entry(symtab, layout, gsym); | |
2e702c99 RM |
5345 | // Since this is not a PC-relative relocation, we may be |
5346 | // taking the address of a function. In that case we need to | |
5347 | // set the entry in the dynamic symbol table to the address of | |
e5d5f5ed | 5348 | // the PLT call stub. |
cf43a2fe | 5349 | if (size == 32 |
e5d5f5ed AM |
5350 | && gsym->is_from_dynobj() |
5351 | && !parameters->options().output_is_position_independent()) | |
2e702c99 | 5352 | gsym->set_needs_dynsym_value(); |
c9269dff AM |
5353 | } |
5354 | // Make a dynamic relocation if necessary. | |
c9824451 AM |
5355 | if (needs_dynamic_reloc<size>(gsym, Scan::get_reference_flags(r_type)) |
5356 | || (size == 64 && gsym->type() == elfcpp::STT_GNU_IFUNC)) | |
c9269dff AM |
5357 | { |
5358 | if (gsym->may_need_copy_reloc()) | |
5359 | { | |
5360 | target->copy_reloc(symtab, layout, object, | |
5361 | data_shndx, output_section, gsym, reloc); | |
5362 | } | |
627b30b7 AM |
5363 | else if ((size == 32 |
5364 | && r_type == elfcpp::R_POWERPC_ADDR32 | |
5365 | && gsym->can_use_relative_reloc(false) | |
5366 | && !(gsym->visibility() == elfcpp::STV_PROTECTED | |
5367 | && parameters->options().shared())) | |
5368 | || (size == 64 | |
5369 | && r_type == elfcpp::R_PPC64_ADDR64 | |
5370 | && (gsym->can_use_relative_reloc(false) | |
5371 | || data_shndx == ppc_object->opd_shndx()))) | |
2e702c99 RM |
5372 | { |
5373 | Reloc_section* rela_dyn = target->rela_dyn_section(layout); | |
e5d5f5ed AM |
5374 | unsigned int dynrel = elfcpp::R_POWERPC_RELATIVE; |
5375 | if (gsym->type() == elfcpp::STT_GNU_IFUNC) | |
5376 | { | |
5377 | rela_dyn = target->iplt_section()->rel_plt(); | |
5378 | dynrel = elfcpp::R_POWERPC_IRELATIVE; | |
5379 | } | |
5380 | rela_dyn->add_symbolless_global_addend( | |
5381 | gsym, dynrel, output_section, object, data_shndx, | |
5382 | reloc.get_r_offset(), reloc.get_r_addend()); | |
2e702c99 RM |
5383 | } |
5384 | else | |
5385 | { | |
5386 | Reloc_section* rela_dyn = target->rela_dyn_section(layout); | |
42cacb20 | 5387 | check_non_pic(object, r_type); |
dd93cd0a AM |
5388 | rela_dyn->add_global(gsym, r_type, output_section, |
5389 | object, data_shndx, | |
5390 | reloc.get_r_offset(), | |
5391 | reloc.get_r_addend()); | |
2e702c99 RM |
5392 | } |
5393 | } | |
42cacb20 DE |
5394 | } |
5395 | break; | |
5396 | ||
cf43a2fe | 5397 | case elfcpp::R_PPC_PLTREL24: |
42cacb20 | 5398 | case elfcpp::R_POWERPC_REL24: |
ec661b9d AM |
5399 | target->push_branch(ppc_object, data_shndx, reloc.get_r_offset(), |
5400 | r_type, elfcpp::elf_r_sym<size>(reloc.get_r_info()), | |
5401 | reloc.get_r_addend()); | |
3ea0a085 AM |
5402 | if (gsym->needs_plt_entry() |
5403 | || (!gsym->final_value_is_known() | |
5404 | && (gsym->is_undefined() | |
5405 | || gsym->is_from_dynobj() | |
5406 | || gsym->is_preemptible()))) | |
ec661b9d | 5407 | target->make_plt_entry(symtab, layout, gsym); |
3ea0a085 | 5408 | // Fall thru |
42cacb20 | 5409 | |
3ea0a085 | 5410 | case elfcpp::R_PPC64_REL64: |
dd93cd0a | 5411 | case elfcpp::R_POWERPC_REL32: |
3ea0a085 AM |
5412 | // Make a dynamic relocation if necessary. |
5413 | if (needs_dynamic_reloc<size>(gsym, Scan::get_reference_flags(r_type))) | |
5414 | { | |
5415 | if (gsym->may_need_copy_reloc()) | |
5416 | { | |
5417 | target->copy_reloc(symtab, layout, object, | |
5418 | data_shndx, output_section, gsym, | |
5419 | reloc); | |
5420 | } | |
5421 | else | |
5422 | { | |
5423 | Reloc_section* rela_dyn = target->rela_dyn_section(layout); | |
5424 | check_non_pic(object, r_type); | |
5425 | rela_dyn->add_global(gsym, r_type, output_section, object, | |
5426 | data_shndx, reloc.get_r_offset(), | |
5427 | reloc.get_r_addend()); | |
5428 | } | |
5429 | } | |
5430 | break; | |
5431 | ||
ec661b9d AM |
5432 | case elfcpp::R_POWERPC_REL14: |
5433 | case elfcpp::R_POWERPC_REL14_BRTAKEN: | |
5434 | case elfcpp::R_POWERPC_REL14_BRNTAKEN: | |
5435 | target->push_branch(ppc_object, data_shndx, reloc.get_r_offset(), | |
5436 | r_type, elfcpp::elf_r_sym<size>(reloc.get_r_info()), | |
5437 | reloc.get_r_addend()); | |
5438 | break; | |
5439 | ||
6ce78956 AM |
5440 | case elfcpp::R_POWERPC_REL16: |
5441 | case elfcpp::R_POWERPC_REL16_LO: | |
5442 | case elfcpp::R_POWERPC_REL16_HI: | |
5443 | case elfcpp::R_POWERPC_REL16_HA: | |
dd93cd0a AM |
5444 | case elfcpp::R_POWERPC_SECTOFF: |
5445 | case elfcpp::R_POWERPC_TPREL16: | |
5446 | case elfcpp::R_POWERPC_DTPREL16: | |
5447 | case elfcpp::R_POWERPC_SECTOFF_LO: | |
5448 | case elfcpp::R_POWERPC_TPREL16_LO: | |
5449 | case elfcpp::R_POWERPC_DTPREL16_LO: | |
5450 | case elfcpp::R_POWERPC_SECTOFF_HI: | |
5451 | case elfcpp::R_POWERPC_TPREL16_HI: | |
5452 | case elfcpp::R_POWERPC_DTPREL16_HI: | |
5453 | case elfcpp::R_POWERPC_SECTOFF_HA: | |
5454 | case elfcpp::R_POWERPC_TPREL16_HA: | |
5455 | case elfcpp::R_POWERPC_DTPREL16_HA: | |
5456 | case elfcpp::R_PPC64_DTPREL16_HIGHER: | |
5457 | case elfcpp::R_PPC64_TPREL16_HIGHER: | |
5458 | case elfcpp::R_PPC64_DTPREL16_HIGHERA: | |
5459 | case elfcpp::R_PPC64_TPREL16_HIGHERA: | |
5460 | case elfcpp::R_PPC64_DTPREL16_HIGHEST: | |
5461 | case elfcpp::R_PPC64_TPREL16_HIGHEST: | |
5462 | case elfcpp::R_PPC64_DTPREL16_HIGHESTA: | |
5463 | case elfcpp::R_PPC64_TPREL16_HIGHESTA: | |
5464 | case elfcpp::R_PPC64_TPREL16_DS: | |
5465 | case elfcpp::R_PPC64_TPREL16_LO_DS: | |
5466 | case elfcpp::R_PPC64_DTPREL16_DS: | |
5467 | case elfcpp::R_PPC64_DTPREL16_LO_DS: | |
5468 | case elfcpp::R_PPC64_SECTOFF_DS: | |
5469 | case elfcpp::R_PPC64_SECTOFF_LO_DS: | |
5470 | case elfcpp::R_PPC64_TLSGD: | |
5471 | case elfcpp::R_PPC64_TLSLD: | |
cf43a2fe AM |
5472 | break; |
5473 | ||
42cacb20 DE |
5474 | case elfcpp::R_POWERPC_GOT16: |
5475 | case elfcpp::R_POWERPC_GOT16_LO: | |
5476 | case elfcpp::R_POWERPC_GOT16_HI: | |
5477 | case elfcpp::R_POWERPC_GOT16_HA: | |
dd93cd0a AM |
5478 | case elfcpp::R_PPC64_GOT16_DS: |
5479 | case elfcpp::R_PPC64_GOT16_LO_DS: | |
42cacb20 | 5480 | { |
c9269dff AM |
5481 | // The symbol requires a GOT entry. |
5482 | Output_data_got_powerpc<size, big_endian>* got; | |
42cacb20 DE |
5483 | |
5484 | got = target->got_section(symtab, layout); | |
2e702c99 | 5485 | if (gsym->final_value_is_known()) |
2e702c99 | 5486 | { |
e5d5f5ed AM |
5487 | if (size == 32 && gsym->type() == elfcpp::STT_GNU_IFUNC) |
5488 | got->add_global_plt(gsym, GOT_TYPE_STANDARD); | |
5489 | else | |
5490 | got->add_global(gsym, GOT_TYPE_STANDARD); | |
5491 | } | |
5492 | else if (!gsym->has_got_offset(GOT_TYPE_STANDARD)) | |
5493 | { | |
5494 | // If we are generating a shared object or a pie, this | |
5495 | // symbol's GOT entry will be set by a dynamic relocation. | |
5496 | unsigned int off = got->add_constant(0); | |
5497 | gsym->set_got_offset(GOT_TYPE_STANDARD, off); | |
5498 | ||
2e702c99 | 5499 | Reloc_section* rela_dyn = target->rela_dyn_section(layout); |
e5d5f5ed AM |
5500 | if (gsym->can_use_relative_reloc(false) |
5501 | && !(size == 32 | |
5502 | && gsym->visibility() == elfcpp::STV_PROTECTED | |
5503 | && parameters->options().shared())) | |
2e702c99 | 5504 | { |
e5d5f5ed AM |
5505 | unsigned int dynrel = elfcpp::R_POWERPC_RELATIVE; |
5506 | if (gsym->type() == elfcpp::STT_GNU_IFUNC) | |
5507 | { | |
5508 | rela_dyn = target->iplt_section()->rel_plt(); | |
5509 | dynrel = elfcpp::R_POWERPC_IRELATIVE; | |
5510 | } | |
5511 | rela_dyn->add_global_relative(gsym, dynrel, got, off, 0, false); | |
5512 | } | |
5513 | else | |
5514 | { | |
5515 | unsigned int dynrel = elfcpp::R_POWERPC_GLOB_DAT; | |
5516 | rela_dyn->add_global(gsym, dynrel, got, off, 0); | |
42cacb20 | 5517 | } |
2e702c99 | 5518 | } |
42cacb20 DE |
5519 | } |
5520 | break; | |
5521 | ||
cf43a2fe AM |
5522 | case elfcpp::R_PPC64_TOC16: |
5523 | case elfcpp::R_PPC64_TOC16_LO: | |
5524 | case elfcpp::R_PPC64_TOC16_HI: | |
5525 | case elfcpp::R_PPC64_TOC16_HA: | |
5526 | case elfcpp::R_PPC64_TOC16_DS: | |
5527 | case elfcpp::R_PPC64_TOC16_LO_DS: | |
42cacb20 DE |
5528 | // We need a GOT section. |
5529 | target->got_section(symtab, layout); | |
5530 | break; | |
5531 | ||
dd93cd0a AM |
5532 | case elfcpp::R_POWERPC_GOT_TLSGD16: |
5533 | case elfcpp::R_POWERPC_GOT_TLSGD16_LO: | |
5534 | case elfcpp::R_POWERPC_GOT_TLSGD16_HI: | |
5535 | case elfcpp::R_POWERPC_GOT_TLSGD16_HA: | |
5536 | { | |
5537 | const bool final = gsym->final_value_is_known(); | |
5538 | const tls::Tls_optimization tls_type = target->optimize_tls_gd(final); | |
5539 | if (tls_type == tls::TLSOPT_NONE) | |
5540 | { | |
5541 | Output_data_got_powerpc<size, big_endian>* got | |
5542 | = target->got_section(symtab, layout); | |
5543 | got->add_global_pair_with_rel(gsym, GOT_TYPE_TLSGD, | |
5544 | target->rela_dyn_section(layout), | |
5545 | elfcpp::R_POWERPC_DTPMOD, | |
5546 | elfcpp::R_POWERPC_DTPREL); | |
5547 | } | |
5548 | else if (tls_type == tls::TLSOPT_TO_IE) | |
5549 | { | |
acc276d8 AM |
5550 | if (!gsym->has_got_offset(GOT_TYPE_TPREL)) |
5551 | { | |
5552 | Output_data_got_powerpc<size, big_endian>* got | |
5553 | = target->got_section(symtab, layout); | |
5554 | Reloc_section* rela_dyn = target->rela_dyn_section(layout); | |
5555 | if (gsym->is_undefined() | |
5556 | || gsym->is_from_dynobj()) | |
5557 | { | |
5558 | got->add_global_with_rel(gsym, GOT_TYPE_TPREL, rela_dyn, | |
5559 | elfcpp::R_POWERPC_TPREL); | |
5560 | } | |
5561 | else | |
5562 | { | |
5563 | unsigned int off = got->add_constant(0); | |
5564 | gsym->set_got_offset(GOT_TYPE_TPREL, off); | |
5565 | unsigned int dynrel = elfcpp::R_POWERPC_TPREL; | |
5566 | rela_dyn->add_symbolless_global_addend(gsym, dynrel, | |
5567 | got, off, 0); | |
5568 | } | |
5569 | } | |
dd93cd0a AM |
5570 | } |
5571 | else if (tls_type == tls::TLSOPT_TO_LE) | |
5572 | { | |
5573 | // no GOT relocs needed for Local Exec. | |
5574 | } | |
5575 | else | |
5576 | gold_unreachable(); | |
5577 | } | |
42cacb20 DE |
5578 | break; |
5579 | ||
dd93cd0a AM |
5580 | case elfcpp::R_POWERPC_GOT_TLSLD16: |
5581 | case elfcpp::R_POWERPC_GOT_TLSLD16_LO: | |
5582 | case elfcpp::R_POWERPC_GOT_TLSLD16_HI: | |
5583 | case elfcpp::R_POWERPC_GOT_TLSLD16_HA: | |
5584 | { | |
5585 | const tls::Tls_optimization tls_type = target->optimize_tls_ld(); | |
5586 | if (tls_type == tls::TLSOPT_NONE) | |
5587 | target->tlsld_got_offset(symtab, layout, object); | |
5588 | else if (tls_type == tls::TLSOPT_TO_LE) | |
5589 | { | |
5590 | // no GOT relocs needed for Local Exec. | |
7404fe1b AM |
5591 | if (parameters->options().emit_relocs()) |
5592 | { | |
5593 | Output_section* os = layout->tls_segment()->first_section(); | |
5594 | gold_assert(os != NULL); | |
5595 | os->set_needs_symtab_index(); | |
5596 | } | |
dd93cd0a AM |
5597 | } |
5598 | else | |
5599 | gold_unreachable(); | |
5600 | } | |
5601 | break; | |
5602 | ||
5603 | case elfcpp::R_POWERPC_GOT_DTPREL16: | |
5604 | case elfcpp::R_POWERPC_GOT_DTPREL16_LO: | |
5605 | case elfcpp::R_POWERPC_GOT_DTPREL16_HI: | |
5606 | case elfcpp::R_POWERPC_GOT_DTPREL16_HA: | |
5607 | { | |
5608 | Output_data_got_powerpc<size, big_endian>* got | |
5609 | = target->got_section(symtab, layout); | |
bd73a62d AM |
5610 | if (!gsym->final_value_is_known() |
5611 | && (gsym->is_from_dynobj() | |
5612 | || gsym->is_undefined() | |
5613 | || gsym->is_preemptible())) | |
5614 | got->add_global_with_rel(gsym, GOT_TYPE_DTPREL, | |
5615 | target->rela_dyn_section(layout), | |
5616 | elfcpp::R_POWERPC_DTPREL); | |
5617 | else | |
5618 | got->add_global_tls(gsym, GOT_TYPE_DTPREL); | |
dd93cd0a AM |
5619 | } |
5620 | break; | |
5621 | ||
5622 | case elfcpp::R_POWERPC_GOT_TPREL16: | |
5623 | case elfcpp::R_POWERPC_GOT_TPREL16_LO: | |
5624 | case elfcpp::R_POWERPC_GOT_TPREL16_HI: | |
5625 | case elfcpp::R_POWERPC_GOT_TPREL16_HA: | |
5626 | { | |
5627 | const bool final = gsym->final_value_is_known(); | |
5628 | const tls::Tls_optimization tls_type = target->optimize_tls_ie(final); | |
5629 | if (tls_type == tls::TLSOPT_NONE) | |
5630 | { | |
acc276d8 AM |
5631 | if (!gsym->has_got_offset(GOT_TYPE_TPREL)) |
5632 | { | |
5633 | Output_data_got_powerpc<size, big_endian>* got | |
5634 | = target->got_section(symtab, layout); | |
5635 | Reloc_section* rela_dyn = target->rela_dyn_section(layout); | |
5636 | if (gsym->is_undefined() | |
5637 | || gsym->is_from_dynobj()) | |
5638 | { | |
5639 | got->add_global_with_rel(gsym, GOT_TYPE_TPREL, rela_dyn, | |
5640 | elfcpp::R_POWERPC_TPREL); | |
5641 | } | |
5642 | else | |
5643 | { | |
5644 | unsigned int off = got->add_constant(0); | |
5645 | gsym->set_got_offset(GOT_TYPE_TPREL, off); | |
5646 | unsigned int dynrel = elfcpp::R_POWERPC_TPREL; | |
5647 | rela_dyn->add_symbolless_global_addend(gsym, dynrel, | |
5648 | got, off, 0); | |
5649 | } | |
5650 | } | |
dd93cd0a AM |
5651 | } |
5652 | else if (tls_type == tls::TLSOPT_TO_LE) | |
5653 | { | |
5654 | // no GOT relocs needed for Local Exec. | |
5655 | } | |
5656 | else | |
5657 | gold_unreachable(); | |
5658 | } | |
42cacb20 DE |
5659 | break; |
5660 | ||
5661 | default: | |
5662 | unsupported_reloc_global(object, r_type, gsym); | |
5663 | break; | |
5664 | } | |
d8f5a274 AM |
5665 | |
5666 | switch (r_type) | |
5667 | { | |
5668 | case elfcpp::R_POWERPC_GOT_TLSLD16: | |
5669 | case elfcpp::R_POWERPC_GOT_TLSGD16: | |
5670 | case elfcpp::R_POWERPC_GOT_TPREL16: | |
5671 | case elfcpp::R_POWERPC_GOT_DTPREL16: | |
5672 | case elfcpp::R_POWERPC_GOT16: | |
5673 | case elfcpp::R_PPC64_GOT16_DS: | |
5674 | case elfcpp::R_PPC64_TOC16: | |
5675 | case elfcpp::R_PPC64_TOC16_DS: | |
5676 | ppc_object->set_has_small_toc_reloc(); | |
5677 | default: | |
5678 | break; | |
5679 | } | |
42cacb20 DE |
5680 | } |
5681 | ||
6d03d481 ST |
5682 | // Process relocations for gc. |
5683 | ||
5684 | template<int size, bool big_endian> | |
5685 | void | |
5686 | Target_powerpc<size, big_endian>::gc_process_relocs( | |
d83ce4e3 AM |
5687 | Symbol_table* symtab, |
5688 | Layout* layout, | |
5689 | Sized_relobj_file<size, big_endian>* object, | |
5690 | unsigned int data_shndx, | |
5691 | unsigned int, | |
5692 | const unsigned char* prelocs, | |
5693 | size_t reloc_count, | |
5694 | Output_section* output_section, | |
5695 | bool needs_special_offset_handling, | |
5696 | size_t local_symbol_count, | |
5697 | const unsigned char* plocal_symbols) | |
6d03d481 ST |
5698 | { |
5699 | typedef Target_powerpc<size, big_endian> Powerpc; | |
2ea97941 | 5700 | typedef typename Target_powerpc<size, big_endian>::Scan Scan; |
e81fea4d AM |
5701 | Powerpc_relobj<size, big_endian>* ppc_object |
5702 | = static_cast<Powerpc_relobj<size, big_endian>*>(object); | |
5703 | if (size == 64) | |
5704 | ppc_object->set_opd_valid(); | |
5705 | if (size == 64 && data_shndx == ppc_object->opd_shndx()) | |
5706 | { | |
5707 | typename Powerpc_relobj<size, big_endian>::Access_from::iterator p; | |
5708 | for (p = ppc_object->access_from_map()->begin(); | |
5709 | p != ppc_object->access_from_map()->end(); | |
5710 | ++p) | |
5711 | { | |
5712 | Address dst_off = p->first; | |
5713 | unsigned int dst_indx = ppc_object->get_opd_ent(dst_off); | |
5714 | typename Powerpc_relobj<size, big_endian>::Section_refs::iterator s; | |
5715 | for (s = p->second.begin(); s != p->second.end(); ++s) | |
5716 | { | |
5717 | Object* src_obj = s->first; | |
5718 | unsigned int src_indx = s->second; | |
5719 | symtab->gc()->add_reference(src_obj, src_indx, | |
5720 | ppc_object, dst_indx); | |
5721 | } | |
5722 | p->second.clear(); | |
5723 | } | |
5724 | ppc_object->access_from_map()->clear(); | |
c6de8ed4 | 5725 | ppc_object->process_gc_mark(symtab); |
e81fea4d AM |
5726 | // Don't look at .opd relocs as .opd will reference everything. |
5727 | return; | |
5728 | } | |
6d03d481 | 5729 | |
41cbeecc | 5730 | gold::gc_process_relocs<size, big_endian, Powerpc, elfcpp::SHT_RELA, Scan, |
3ff2ccb0 | 5731 | typename Target_powerpc::Relocatable_size_for_reloc>( |
6d03d481 ST |
5732 | symtab, |
5733 | layout, | |
5734 | this, | |
5735 | object, | |
5736 | data_shndx, | |
5737 | prelocs, | |
5738 | reloc_count, | |
5739 | output_section, | |
5740 | needs_special_offset_handling, | |
5741 | local_symbol_count, | |
5742 | plocal_symbols); | |
5743 | } | |
5744 | ||
e81fea4d AM |
5745 | // Handle target specific gc actions when adding a gc reference from |
5746 | // SRC_OBJ, SRC_SHNDX to a location specified by DST_OBJ, DST_SHNDX | |
5747 | // and DST_OFF. For powerpc64, this adds a referenc to the code | |
5748 | // section of a function descriptor. | |
5749 | ||
5750 | template<int size, bool big_endian> | |
5751 | void | |
5752 | Target_powerpc<size, big_endian>::do_gc_add_reference( | |
5753 | Symbol_table* symtab, | |
5754 | Object* src_obj, | |
5755 | unsigned int src_shndx, | |
5756 | Object* dst_obj, | |
5757 | unsigned int dst_shndx, | |
5758 | Address dst_off) const | |
5759 | { | |
6c77229c AM |
5760 | if (size != 64 || dst_obj->is_dynamic()) |
5761 | return; | |
5762 | ||
e81fea4d AM |
5763 | Powerpc_relobj<size, big_endian>* ppc_object |
5764 | = static_cast<Powerpc_relobj<size, big_endian>*>(dst_obj); | |
6c77229c | 5765 | if (dst_shndx == ppc_object->opd_shndx()) |
e81fea4d AM |
5766 | { |
5767 | if (ppc_object->opd_valid()) | |
5768 | { | |
5769 | dst_shndx = ppc_object->get_opd_ent(dst_off); | |
5770 | symtab->gc()->add_reference(src_obj, src_shndx, dst_obj, dst_shndx); | |
5771 | } | |
5772 | else | |
5773 | { | |
5774 | // If we haven't run scan_opd_relocs, we must delay | |
5775 | // processing this function descriptor reference. | |
5776 | ppc_object->add_reference(src_obj, src_shndx, dst_off); | |
5777 | } | |
5778 | } | |
5779 | } | |
5780 | ||
5781 | // Add any special sections for this symbol to the gc work list. | |
5782 | // For powerpc64, this adds the code section of a function | |
5783 | // descriptor. | |
5784 | ||
5785 | template<int size, bool big_endian> | |
5786 | void | |
5787 | Target_powerpc<size, big_endian>::do_gc_mark_symbol( | |
5788 | Symbol_table* symtab, | |
5789 | Symbol* sym) const | |
5790 | { | |
5791 | if (size == 64) | |
5792 | { | |
5793 | Powerpc_relobj<size, big_endian>* ppc_object | |
5794 | = static_cast<Powerpc_relobj<size, big_endian>*>(sym->object()); | |
5795 | bool is_ordinary; | |
5796 | unsigned int shndx = sym->shndx(&is_ordinary); | |
5797 | if (is_ordinary && shndx == ppc_object->opd_shndx()) | |
5798 | { | |
5799 | Sized_symbol<size>* gsym = symtab->get_sized_symbol<size>(sym); | |
5800 | Address dst_off = gsym->value(); | |
c6de8ed4 AM |
5801 | if (ppc_object->opd_valid()) |
5802 | { | |
5803 | unsigned int dst_indx = ppc_object->get_opd_ent(dst_off); | |
5804 | symtab->gc()->worklist().push(Section_id(ppc_object, dst_indx)); | |
5805 | } | |
5806 | else | |
5807 | ppc_object->add_gc_mark(dst_off); | |
e81fea4d AM |
5808 | } |
5809 | } | |
5810 | } | |
5811 | ||
dc3714f3 AM |
5812 | // For a symbol location in .opd, set LOC to the location of the |
5813 | // function entry. | |
5814 | ||
5815 | template<int size, bool big_endian> | |
5816 | void | |
5817 | Target_powerpc<size, big_endian>::do_function_location( | |
5818 | Symbol_location* loc) const | |
5819 | { | |
5820 | if (size == 64) | |
5821 | { | |
5822 | if (loc->object->is_dynamic()) | |
5823 | { | |
5824 | Powerpc_dynobj<size, big_endian>* ppc_object | |
5825 | = static_cast<Powerpc_dynobj<size, big_endian>*>(loc->object); | |
5826 | if (loc->shndx == ppc_object->opd_shndx()) | |
5827 | { | |
5828 | Address dest_off; | |
5829 | Address off = loc->offset - ppc_object->opd_address(); | |
5830 | loc->shndx = ppc_object->get_opd_ent(off, &dest_off); | |
5831 | loc->offset = dest_off; | |
5832 | } | |
5833 | } | |
5834 | else | |
5835 | { | |
5836 | const Powerpc_relobj<size, big_endian>* ppc_object | |
5837 | = static_cast<const Powerpc_relobj<size, big_endian>*>(loc->object); | |
5838 | if (loc->shndx == ppc_object->opd_shndx()) | |
5839 | { | |
5840 | Address dest_off; | |
5841 | loc->shndx = ppc_object->get_opd_ent(loc->offset, &dest_off); | |
5842 | loc->offset = dest_off; | |
5843 | } | |
5844 | } | |
5845 | } | |
5846 | } | |
5847 | ||
42cacb20 DE |
5848 | // Scan relocations for a section. |
5849 | ||
5850 | template<int size, bool big_endian> | |
5851 | void | |
5852 | Target_powerpc<size, big_endian>::scan_relocs( | |
d83ce4e3 AM |
5853 | Symbol_table* symtab, |
5854 | Layout* layout, | |
5855 | Sized_relobj_file<size, big_endian>* object, | |
5856 | unsigned int data_shndx, | |
5857 | unsigned int sh_type, | |
5858 | const unsigned char* prelocs, | |
5859 | size_t reloc_count, | |
5860 | Output_section* output_section, | |
5861 | bool needs_special_offset_handling, | |
5862 | size_t local_symbol_count, | |
5863 | const unsigned char* plocal_symbols) | |
42cacb20 DE |
5864 | { |
5865 | typedef Target_powerpc<size, big_endian> Powerpc; | |
2ea97941 | 5866 | typedef typename Target_powerpc<size, big_endian>::Scan Scan; |
42cacb20 DE |
5867 | |
5868 | if (sh_type == elfcpp::SHT_REL) | |
5869 | { | |
5870 | gold_error(_("%s: unsupported REL reloc section"), | |
5871 | object->name().c_str()); | |
5872 | return; | |
5873 | } | |
5874 | ||
2ea97941 | 5875 | gold::scan_relocs<size, big_endian, Powerpc, elfcpp::SHT_RELA, Scan>( |
42cacb20 DE |
5876 | symtab, |
5877 | layout, | |
5878 | this, | |
5879 | object, | |
5880 | data_shndx, | |
5881 | prelocs, | |
5882 | reloc_count, | |
5883 | output_section, | |
5884 | needs_special_offset_handling, | |
5885 | local_symbol_count, | |
5886 | plocal_symbols); | |
5887 | } | |
5888 | ||
ec4dbad3 AM |
5889 | // Functor class for processing the global symbol table. |
5890 | // Removes symbols defined on discarded opd entries. | |
5891 | ||
5892 | template<bool big_endian> | |
5893 | class Global_symbol_visitor_opd | |
5894 | { | |
5895 | public: | |
5896 | Global_symbol_visitor_opd() | |
5897 | { } | |
5898 | ||
5899 | void | |
5900 | operator()(Sized_symbol<64>* sym) | |
5901 | { | |
5902 | if (sym->has_symtab_index() | |
5903 | || sym->source() != Symbol::FROM_OBJECT | |
5904 | || !sym->in_real_elf()) | |
5905 | return; | |
5906 | ||
6c77229c AM |
5907 | if (sym->object()->is_dynamic()) |
5908 | return; | |
5909 | ||
ec4dbad3 AM |
5910 | Powerpc_relobj<64, big_endian>* symobj |
5911 | = static_cast<Powerpc_relobj<64, big_endian>*>(sym->object()); | |
6c77229c | 5912 | if (symobj->opd_shndx() == 0) |
ec4dbad3 AM |
5913 | return; |
5914 | ||
5915 | bool is_ordinary; | |
5916 | unsigned int shndx = sym->shndx(&is_ordinary); | |
5917 | if (shndx == symobj->opd_shndx() | |
5918 | && symobj->get_opd_discard(sym->value())) | |
5919 | sym->set_symtab_index(-1U); | |
5920 | } | |
5921 | }; | |
5922 | ||
f3a0ed29 AM |
5923 | template<int size, bool big_endian> |
5924 | void | |
5925 | Target_powerpc<size, big_endian>::define_save_restore_funcs( | |
5926 | Layout* layout, | |
5927 | Symbol_table* symtab) | |
5928 | { | |
5929 | if (size == 64) | |
5930 | { | |
5931 | Output_data_save_res<64, big_endian>* savres | |
5932 | = new Output_data_save_res<64, big_endian>(symtab); | |
5933 | layout->add_output_section_data(".text", elfcpp::SHT_PROGBITS, | |
5934 | elfcpp::SHF_ALLOC | elfcpp::SHF_EXECINSTR, | |
5935 | savres, ORDER_TEXT, false); | |
5936 | } | |
5937 | } | |
5938 | ||
d8f5a274 AM |
5939 | // Sort linker created .got section first (for the header), then input |
5940 | // sections belonging to files using small model code. | |
5941 | ||
5942 | template<bool big_endian> | |
5943 | class Sort_toc_sections | |
5944 | { | |
5945 | public: | |
5946 | bool | |
5947 | operator()(const Output_section::Input_section& is1, | |
5948 | const Output_section::Input_section& is2) const | |
5949 | { | |
5950 | if (!is1.is_input_section() && is2.is_input_section()) | |
5951 | return true; | |
5952 | bool small1 | |
5953 | = (is1.is_input_section() | |
5954 | && (static_cast<const Powerpc_relobj<64, big_endian>*>(is1.relobj()) | |
5955 | ->has_small_toc_reloc())); | |
5956 | bool small2 | |
5957 | = (is2.is_input_section() | |
5958 | && (static_cast<const Powerpc_relobj<64, big_endian>*>(is2.relobj()) | |
5959 | ->has_small_toc_reloc())); | |
5960 | return small1 && !small2; | |
5961 | } | |
5962 | }; | |
5963 | ||
42cacb20 DE |
5964 | // Finalize the sections. |
5965 | ||
5966 | template<int size, bool big_endian> | |
5967 | void | |
d5b40221 DK |
5968 | Target_powerpc<size, big_endian>::do_finalize_sections( |
5969 | Layout* layout, | |
f59f41f3 | 5970 | const Input_objects*, |
ec4dbad3 | 5971 | Symbol_table* symtab) |
42cacb20 | 5972 | { |
c9824451 AM |
5973 | if (parameters->doing_static_link()) |
5974 | { | |
5975 | // At least some versions of glibc elf-init.o have a strong | |
5976 | // reference to __rela_iplt marker syms. A weak ref would be | |
5977 | // better.. | |
5978 | if (this->iplt_ != NULL) | |
5979 | { | |
5980 | Reloc_section* rel = this->iplt_->rel_plt(); | |
5981 | symtab->define_in_output_data("__rela_iplt_start", NULL, | |
5982 | Symbol_table::PREDEFINED, rel, 0, 0, | |
5983 | elfcpp::STT_NOTYPE, elfcpp::STB_GLOBAL, | |
5984 | elfcpp::STV_HIDDEN, 0, false, true); | |
5985 | symtab->define_in_output_data("__rela_iplt_end", NULL, | |
5986 | Symbol_table::PREDEFINED, rel, 0, 0, | |
5987 | elfcpp::STT_NOTYPE, elfcpp::STB_GLOBAL, | |
5988 | elfcpp::STV_HIDDEN, 0, true, true); | |
5989 | } | |
5990 | else | |
5991 | { | |
5992 | symtab->define_as_constant("__rela_iplt_start", NULL, | |
5993 | Symbol_table::PREDEFINED, 0, 0, | |
5994 | elfcpp::STT_NOTYPE, elfcpp::STB_GLOBAL, | |
5995 | elfcpp::STV_HIDDEN, 0, true, false); | |
5996 | symtab->define_as_constant("__rela_iplt_end", NULL, | |
5997 | Symbol_table::PREDEFINED, 0, 0, | |
5998 | elfcpp::STT_NOTYPE, elfcpp::STB_GLOBAL, | |
5999 | elfcpp::STV_HIDDEN, 0, true, false); | |
6000 | } | |
6001 | } | |
6002 | ||
ec4dbad3 AM |
6003 | if (size == 64) |
6004 | { | |
6005 | typedef Global_symbol_visitor_opd<big_endian> Symbol_visitor; | |
6006 | symtab->for_all_symbols<64, Symbol_visitor>(Symbol_visitor()); | |
ec661b9d AM |
6007 | |
6008 | if (!parameters->options().relocatable()) | |
6009 | { | |
6010 | this->define_save_restore_funcs(layout, symtab); | |
6011 | ||
6012 | // Annoyingly, we need to make these sections now whether or | |
6013 | // not we need them. If we delay until do_relax then we | |
6014 | // need to mess with the relaxation machinery checkpointing. | |
6015 | this->got_section(symtab, layout); | |
6016 | this->make_brlt_section(layout); | |
d8f5a274 AM |
6017 | |
6018 | if (parameters->options().toc_sort()) | |
6019 | { | |
6020 | Output_section* os = this->got_->output_section(); | |
6021 | if (os != NULL && os->input_sections().size() > 1) | |
6022 | std::stable_sort(os->input_sections().begin(), | |
6023 | os->input_sections().end(), | |
6024 | Sort_toc_sections<big_endian>()); | |
6025 | } | |
ec661b9d | 6026 | } |
ec4dbad3 AM |
6027 | } |
6028 | ||
42cacb20 | 6029 | // Fill in some more dynamic tags. |
c9269dff | 6030 | Output_data_dynamic* odyn = layout->dynamic_data(); |
c9824451 | 6031 | if (odyn != NULL) |
cf43a2fe | 6032 | { |
c9824451 AM |
6033 | const Reloc_section* rel_plt = (this->plt_ == NULL |
6034 | ? NULL | |
6035 | : this->plt_->rel_plt()); | |
6036 | layout->add_target_dynamic_tags(false, this->plt_, rel_plt, | |
6037 | this->rela_dyn_, true, size == 32); | |
6038 | ||
6039 | if (size == 32) | |
dd93cd0a | 6040 | { |
c9824451 AM |
6041 | if (this->got_ != NULL) |
6042 | { | |
6043 | this->got_->finalize_data_size(); | |
6044 | odyn->add_section_plus_offset(elfcpp::DT_PPC_GOT, | |
6045 | this->got_, this->got_->g_o_t()); | |
6046 | } | |
dd93cd0a | 6047 | } |
c9824451 | 6048 | else |
dd93cd0a | 6049 | { |
c9824451 AM |
6050 | if (this->glink_ != NULL) |
6051 | { | |
6052 | this->glink_->finalize_data_size(); | |
6053 | odyn->add_section_plus_offset(elfcpp::DT_PPC64_GLINK, | |
6054 | this->glink_, | |
ec661b9d | 6055 | (this->glink_->pltresolve_size |
c9824451 AM |
6056 | - 32)); |
6057 | } | |
dd93cd0a | 6058 | } |
c9269dff | 6059 | } |
cf43a2fe | 6060 | |
42cacb20 DE |
6061 | // Emit any relocs we saved in an attempt to avoid generating COPY |
6062 | // relocs. | |
6063 | if (this->copy_relocs_.any_saved_relocs()) | |
6064 | this->copy_relocs_.emit(this->rela_dyn_section(layout)); | |
6065 | } | |
6066 | ||
aba6bc71 AM |
6067 | // Return TRUE iff INSN is one we expect on a _LO variety toc/got |
6068 | // reloc. | |
6069 | ||
6070 | static bool | |
6071 | ok_lo_toc_insn(uint32_t insn) | |
6072 | { | |
6073 | return ((insn & (0x3f << 26)) == 14u << 26 /* addi */ | |
6074 | || (insn & (0x3f << 26)) == 32u << 26 /* lwz */ | |
6075 | || (insn & (0x3f << 26)) == 34u << 26 /* lbz */ | |
6076 | || (insn & (0x3f << 26)) == 36u << 26 /* stw */ | |
6077 | || (insn & (0x3f << 26)) == 38u << 26 /* stb */ | |
6078 | || (insn & (0x3f << 26)) == 40u << 26 /* lhz */ | |
6079 | || (insn & (0x3f << 26)) == 42u << 26 /* lha */ | |
6080 | || (insn & (0x3f << 26)) == 44u << 26 /* sth */ | |
6081 | || (insn & (0x3f << 26)) == 46u << 26 /* lmw */ | |
6082 | || (insn & (0x3f << 26)) == 47u << 26 /* stmw */ | |
6083 | || (insn & (0x3f << 26)) == 48u << 26 /* lfs */ | |
6084 | || (insn & (0x3f << 26)) == 50u << 26 /* lfd */ | |
6085 | || (insn & (0x3f << 26)) == 52u << 26 /* stfs */ | |
6086 | || (insn & (0x3f << 26)) == 54u << 26 /* stfd */ | |
6087 | || ((insn & (0x3f << 26)) == 58u << 26 /* lwa,ld,lmd */ | |
6088 | && (insn & 3) != 1) | |
6089 | || ((insn & (0x3f << 26)) == 62u << 26 /* std, stmd */ | |
6090 | && ((insn & 3) == 0 || (insn & 3) == 3)) | |
6091 | || (insn & (0x3f << 26)) == 12u << 26 /* addic */); | |
6092 | } | |
6093 | ||
3ea0a085 AM |
6094 | // Return the value to use for a branch relocation. |
6095 | ||
6096 | template<int size, bool big_endian> | |
ec5b8187 | 6097 | typename Target_powerpc<size, big_endian>::Address |
3ea0a085 | 6098 | Target_powerpc<size, big_endian>::symval_for_branch( |
6c77229c | 6099 | const Symbol_table* symtab, |
3ea0a085 AM |
6100 | Address value, |
6101 | const Sized_symbol<size>* gsym, | |
6102 | Powerpc_relobj<size, big_endian>* object, | |
6103 | unsigned int *dest_shndx) | |
6104 | { | |
6105 | *dest_shndx = 0; | |
6106 | if (size == 32) | |
6107 | return value; | |
6108 | ||
6109 | // If the symbol is defined in an opd section, ie. is a function | |
6110 | // descriptor, use the function descriptor code entry address | |
6111 | Powerpc_relobj<size, big_endian>* symobj = object; | |
f3a0ed29 AM |
6112 | if (gsym != NULL |
6113 | && gsym->source() != Symbol::FROM_OBJECT) | |
6114 | return value; | |
3ea0a085 AM |
6115 | if (gsym != NULL) |
6116 | symobj = static_cast<Powerpc_relobj<size, big_endian>*>(gsym->object()); | |
6117 | unsigned int shndx = symobj->opd_shndx(); | |
6118 | if (shndx == 0) | |
6119 | return value; | |
6120 | Address opd_addr = symobj->get_output_section_offset(shndx); | |
6121 | gold_assert(opd_addr != invalid_address); | |
6122 | opd_addr += symobj->output_section(shndx)->address(); | |
6123 | if (value >= opd_addr && value < opd_addr + symobj->section_size(shndx)) | |
6124 | { | |
6125 | Address sec_off; | |
e81fea4d | 6126 | *dest_shndx = symobj->get_opd_ent(value - opd_addr, &sec_off); |
6c77229c AM |
6127 | if (symtab->is_section_folded(symobj, *dest_shndx)) |
6128 | { | |
6129 | Section_id folded | |
6130 | = symtab->icf()->get_folded_section(symobj, *dest_shndx); | |
6131 | symobj = static_cast<Powerpc_relobj<size, big_endian>*>(folded.first); | |
6132 | *dest_shndx = folded.second; | |
6133 | } | |
3ea0a085 AM |
6134 | Address sec_addr = symobj->get_output_section_offset(*dest_shndx); |
6135 | gold_assert(sec_addr != invalid_address); | |
6136 | sec_addr += symobj->output_section(*dest_shndx)->address(); | |
6137 | value = sec_addr + sec_off; | |
6138 | } | |
6139 | return value; | |
6140 | } | |
6141 | ||
42cacb20 DE |
6142 | // Perform a relocation. |
6143 | ||
6144 | template<int size, bool big_endian> | |
6145 | inline bool | |
6146 | Target_powerpc<size, big_endian>::Relocate::relocate( | |
d83ce4e3 AM |
6147 | const Relocate_info<size, big_endian>* relinfo, |
6148 | Target_powerpc* target, | |
6149 | Output_section* os, | |
6150 | size_t relnum, | |
6151 | const elfcpp::Rela<size, big_endian>& rela, | |
6152 | unsigned int r_type, | |
6153 | const Sized_symbol<size>* gsym, | |
6154 | const Symbol_value<size>* psymval, | |
6155 | unsigned char* view, | |
c9269dff AM |
6156 | Address address, |
6157 | section_size_type view_size) | |
42cacb20 | 6158 | { |
e3deeb9c | 6159 | switch (this->maybe_skip_tls_get_addr_call(r_type, gsym)) |
dd93cd0a | 6160 | { |
e3deeb9c AM |
6161 | case Track_tls::NOT_EXPECTED: |
6162 | gold_error_at_location(relinfo, relnum, rela.get_r_offset(), | |
6163 | _("__tls_get_addr call lacks marker reloc")); | |
6164 | break; | |
6165 | case Track_tls::EXPECTED: | |
6166 | // We have already complained. | |
6167 | break; | |
6168 | case Track_tls::SKIP: | |
6169 | return true; | |
6170 | case Track_tls::NORMAL: | |
6171 | break; | |
dd93cd0a | 6172 | } |
dd93cd0a | 6173 | |
42cacb20 | 6174 | typedef Powerpc_relocate_functions<size, big_endian> Reloc; |
dd93cd0a | 6175 | typedef typename elfcpp::Swap<32, big_endian>::Valtype Insn; |
3ea0a085 AM |
6176 | Powerpc_relobj<size, big_endian>* const object |
6177 | = static_cast<Powerpc_relobj<size, big_endian>*>(relinfo->object); | |
dd93cd0a AM |
6178 | Address value = 0; |
6179 | bool has_plt_value = false; | |
e5d5f5ed | 6180 | unsigned int r_sym = elfcpp::elf_r_sym<size>(rela.get_r_info()); |
dd93cd0a | 6181 | if (gsym != NULL |
e5d5f5ed AM |
6182 | ? use_plt_offset<size>(gsym, Scan::get_reference_flags(r_type)) |
6183 | : object->local_has_plt_offset(r_sym)) | |
dd93cd0a | 6184 | { |
ec661b9d AM |
6185 | Stub_table<size, big_endian>* stub_table |
6186 | = object->stub_table(relinfo->data_shndx); | |
6187 | if (stub_table == NULL) | |
6188 | { | |
6189 | // This is a ref from a data section to an ifunc symbol. | |
6190 | if (target->stub_tables().size() != 0) | |
6191 | stub_table = target->stub_tables()[0]; | |
6192 | } | |
6193 | gold_assert(stub_table != NULL); | |
6194 | Address off; | |
c9824451 | 6195 | if (gsym != NULL) |
ec661b9d AM |
6196 | off = stub_table->find_plt_call_entry(object, gsym, r_type, |
6197 | rela.get_r_addend()); | |
c9824451 | 6198 | else |
ec661b9d AM |
6199 | off = stub_table->find_plt_call_entry(object, r_sym, r_type, |
6200 | rela.get_r_addend()); | |
6201 | gold_assert(off != invalid_address); | |
6202 | value = stub_table->stub_address() + off; | |
dd93cd0a AM |
6203 | has_plt_value = true; |
6204 | } | |
cf43a2fe AM |
6205 | |
6206 | if (r_type == elfcpp::R_POWERPC_GOT16 | |
6207 | || r_type == elfcpp::R_POWERPC_GOT16_LO | |
6208 | || r_type == elfcpp::R_POWERPC_GOT16_HI | |
6209 | || r_type == elfcpp::R_POWERPC_GOT16_HA | |
6210 | || r_type == elfcpp::R_PPC64_GOT16_DS | |
6211 | || r_type == elfcpp::R_PPC64_GOT16_LO_DS) | |
42cacb20 | 6212 | { |
cf43a2fe AM |
6213 | if (gsym != NULL) |
6214 | { | |
6215 | gold_assert(gsym->has_got_offset(GOT_TYPE_STANDARD)); | |
6216 | value = gsym->got_offset(GOT_TYPE_STANDARD); | |
6217 | } | |
6218 | else | |
6219 | { | |
6220 | unsigned int r_sym = elfcpp::elf_r_sym<size>(rela.get_r_info()); | |
6221 | gold_assert(object->local_has_got_offset(r_sym, GOT_TYPE_STANDARD)); | |
6222 | value = object->local_got_offset(r_sym, GOT_TYPE_STANDARD); | |
6223 | } | |
dd93cd0a | 6224 | value -= target->got_section()->got_base_offset(object); |
cf43a2fe AM |
6225 | } |
6226 | else if (r_type == elfcpp::R_PPC64_TOC) | |
6227 | { | |
c9269dff | 6228 | value = (target->got_section()->output_section()->address() |
dd93cd0a | 6229 | + object->toc_base_offset()); |
cf43a2fe AM |
6230 | } |
6231 | else if (gsym != NULL | |
6232 | && (r_type == elfcpp::R_POWERPC_REL24 | |
6233 | || r_type == elfcpp::R_PPC_PLTREL24) | |
dd93cd0a | 6234 | && has_plt_value) |
cf43a2fe | 6235 | { |
c9269dff AM |
6236 | if (size == 64) |
6237 | { | |
6238 | typedef typename elfcpp::Swap<32, big_endian>::Valtype Valtype; | |
6239 | Valtype* wv = reinterpret_cast<Valtype*>(view); | |
6240 | bool can_plt_call = false; | |
6241 | if (rela.get_r_offset() + 8 <= view_size) | |
6242 | { | |
3ea0a085 | 6243 | Valtype insn = elfcpp::Swap<32, big_endian>::readval(wv); |
c9269dff | 6244 | Valtype insn2 = elfcpp::Swap<32, big_endian>::readval(wv + 1); |
3ea0a085 AM |
6245 | if ((insn & 1) != 0 |
6246 | && (insn2 == nop | |
6247 | || insn2 == cror_15_15_15 || insn2 == cror_31_31_31)) | |
c9269dff AM |
6248 | { |
6249 | elfcpp::Swap<32, big_endian>::writeval(wv + 1, ld_2_1 + 40); | |
6250 | can_plt_call = true; | |
6251 | } | |
6252 | } | |
6253 | if (!can_plt_call) | |
3ea0a085 AM |
6254 | { |
6255 | // If we don't have a branch and link followed by a nop, | |
6256 | // we can't go via the plt because there is no place to | |
6257 | // put a toc restoring instruction. | |
6258 | // Unless we know we won't be returning. | |
6259 | if (strcmp(gsym->name(), "__libc_start_main") == 0) | |
6260 | can_plt_call = true; | |
6261 | } | |
6262 | if (!can_plt_call) | |
6263 | { | |
6264 | // This is not an error in one special case: A self | |
6265 | // call. It isn't possible to cheaply verify we have | |
6266 | // such a call so just check for a call to the same | |
6267 | // section. | |
6268 | bool ok = false; | |
c9824451 | 6269 | Address code = value; |
3ea0a085 AM |
6270 | if (gsym->source() == Symbol::FROM_OBJECT |
6271 | && gsym->object() == object) | |
6272 | { | |
6273 | Address addend = rela.get_r_addend(); | |
6274 | unsigned int dest_shndx; | |
c9824451 | 6275 | Address opdent = psymval->value(object, addend); |
6c77229c AM |
6276 | code = target->symval_for_branch(relinfo->symtab, opdent, |
6277 | gsym, object, &dest_shndx); | |
3ea0a085 AM |
6278 | bool is_ordinary; |
6279 | if (dest_shndx == 0) | |
6280 | dest_shndx = gsym->shndx(&is_ordinary); | |
6281 | ok = dest_shndx == relinfo->data_shndx; | |
6282 | } | |
6283 | if (!ok) | |
c9824451 AM |
6284 | { |
6285 | gold_error_at_location(relinfo, relnum, rela.get_r_offset(), | |
6286 | _("call lacks nop, can't restore toc; " | |
6287 | "recompile with -fPIC")); | |
6288 | value = code; | |
6289 | } | |
3ea0a085 | 6290 | } |
c9269dff | 6291 | } |
cf43a2fe | 6292 | } |
dd93cd0a AM |
6293 | else if (r_type == elfcpp::R_POWERPC_GOT_TLSGD16 |
6294 | || r_type == elfcpp::R_POWERPC_GOT_TLSGD16_LO | |
6295 | || r_type == elfcpp::R_POWERPC_GOT_TLSGD16_HI | |
6296 | || r_type == elfcpp::R_POWERPC_GOT_TLSGD16_HA) | |
6297 | { | |
6298 | // First instruction of a global dynamic sequence, arg setup insn. | |
6299 | const bool final = gsym == NULL || gsym->final_value_is_known(); | |
6300 | const tls::Tls_optimization tls_type = target->optimize_tls_gd(final); | |
6301 | enum Got_type got_type = GOT_TYPE_STANDARD; | |
6302 | if (tls_type == tls::TLSOPT_NONE) | |
6303 | got_type = GOT_TYPE_TLSGD; | |
6304 | else if (tls_type == tls::TLSOPT_TO_IE) | |
6305 | got_type = GOT_TYPE_TPREL; | |
6306 | if (got_type != GOT_TYPE_STANDARD) | |
6307 | { | |
6308 | if (gsym != NULL) | |
6309 | { | |
6310 | gold_assert(gsym->has_got_offset(got_type)); | |
6311 | value = gsym->got_offset(got_type); | |
6312 | } | |
6313 | else | |
6314 | { | |
6315 | unsigned int r_sym = elfcpp::elf_r_sym<size>(rela.get_r_info()); | |
6316 | gold_assert(object->local_has_got_offset(r_sym, got_type)); | |
6317 | value = object->local_got_offset(r_sym, got_type); | |
6318 | } | |
6319 | value -= target->got_section()->got_base_offset(object); | |
6320 | } | |
6321 | if (tls_type == tls::TLSOPT_TO_IE) | |
6322 | { | |
6323 | if (r_type == elfcpp::R_POWERPC_GOT_TLSGD16 | |
6324 | || r_type == elfcpp::R_POWERPC_GOT_TLSGD16_LO) | |
6325 | { | |
6326 | Insn* iview = reinterpret_cast<Insn*>(view - 2 * big_endian); | |
6327 | Insn insn = elfcpp::Swap<32, big_endian>::readval(iview); | |
6328 | insn &= (1 << 26) - (1 << 16); // extract rt,ra from addi | |
6329 | if (size == 32) | |
6330 | insn |= 32 << 26; // lwz | |
6331 | else | |
6332 | insn |= 58 << 26; // ld | |
6333 | elfcpp::Swap<32, big_endian>::writeval(iview, insn); | |
6334 | } | |
6335 | r_type += (elfcpp::R_POWERPC_GOT_TPREL16 | |
6336 | - elfcpp::R_POWERPC_GOT_TLSGD16); | |
6337 | } | |
6338 | else if (tls_type == tls::TLSOPT_TO_LE) | |
6339 | { | |
6340 | if (r_type == elfcpp::R_POWERPC_GOT_TLSGD16 | |
6341 | || r_type == elfcpp::R_POWERPC_GOT_TLSGD16_LO) | |
6342 | { | |
6343 | Insn* iview = reinterpret_cast<Insn*>(view - 2 * big_endian); | |
6344 | Insn insn = addis_3_13; | |
6345 | if (size == 32) | |
6346 | insn = addis_3_2; | |
6347 | elfcpp::Swap<32, big_endian>::writeval(iview, insn); | |
6348 | r_type = elfcpp::R_POWERPC_TPREL16_HA; | |
6349 | value = psymval->value(object, rela.get_r_addend()); | |
6350 | } | |
6351 | else | |
6352 | { | |
6353 | Insn* iview = reinterpret_cast<Insn*>(view - 2 * big_endian); | |
6354 | Insn insn = nop; | |
6355 | elfcpp::Swap<32, big_endian>::writeval(iview, insn); | |
6356 | r_type = elfcpp::R_POWERPC_NONE; | |
6357 | } | |
6358 | } | |
6359 | } | |
6360 | else if (r_type == elfcpp::R_POWERPC_GOT_TLSLD16 | |
6361 | || r_type == elfcpp::R_POWERPC_GOT_TLSLD16_LO | |
6362 | || r_type == elfcpp::R_POWERPC_GOT_TLSLD16_HI | |
6363 | || r_type == elfcpp::R_POWERPC_GOT_TLSLD16_HA) | |
6364 | { | |
6365 | // First instruction of a local dynamic sequence, arg setup insn. | |
6366 | const tls::Tls_optimization tls_type = target->optimize_tls_ld(); | |
6367 | if (tls_type == tls::TLSOPT_NONE) | |
6368 | { | |
6369 | value = target->tlsld_got_offset(); | |
6370 | value -= target->got_section()->got_base_offset(object); | |
6371 | } | |
6372 | else | |
6373 | { | |
6374 | gold_assert(tls_type == tls::TLSOPT_TO_LE); | |
6375 | if (r_type == elfcpp::R_POWERPC_GOT_TLSLD16 | |
6376 | || r_type == elfcpp::R_POWERPC_GOT_TLSLD16_LO) | |
6377 | { | |
6378 | Insn* iview = reinterpret_cast<Insn*>(view - 2 * big_endian); | |
6379 | Insn insn = addis_3_13; | |
6380 | if (size == 32) | |
6381 | insn = addis_3_2; | |
6382 | elfcpp::Swap<32, big_endian>::writeval(iview, insn); | |
6383 | r_type = elfcpp::R_POWERPC_TPREL16_HA; | |
7404fe1b | 6384 | value = dtp_offset; |
dd93cd0a AM |
6385 | } |
6386 | else | |
6387 | { | |
6388 | Insn* iview = reinterpret_cast<Insn*>(view - 2 * big_endian); | |
6389 | Insn insn = nop; | |
6390 | elfcpp::Swap<32, big_endian>::writeval(iview, insn); | |
6391 | r_type = elfcpp::R_POWERPC_NONE; | |
6392 | } | |
6393 | } | |
6394 | } | |
6395 | else if (r_type == elfcpp::R_POWERPC_GOT_DTPREL16 | |
6396 | || r_type == elfcpp::R_POWERPC_GOT_DTPREL16_LO | |
6397 | || r_type == elfcpp::R_POWERPC_GOT_DTPREL16_HI | |
6398 | || r_type == elfcpp::R_POWERPC_GOT_DTPREL16_HA) | |
6399 | { | |
6400 | // Accesses relative to a local dynamic sequence address, | |
6401 | // no optimisation here. | |
6402 | if (gsym != NULL) | |
6403 | { | |
6404 | gold_assert(gsym->has_got_offset(GOT_TYPE_DTPREL)); | |
6405 | value = gsym->got_offset(GOT_TYPE_DTPREL); | |
6406 | } | |
6407 | else | |
6408 | { | |
6409 | unsigned int r_sym = elfcpp::elf_r_sym<size>(rela.get_r_info()); | |
6410 | gold_assert(object->local_has_got_offset(r_sym, GOT_TYPE_DTPREL)); | |
6411 | value = object->local_got_offset(r_sym, GOT_TYPE_DTPREL); | |
6412 | } | |
6413 | value -= target->got_section()->got_base_offset(object); | |
6414 | } | |
6415 | else if (r_type == elfcpp::R_POWERPC_GOT_TPREL16 | |
6416 | || r_type == elfcpp::R_POWERPC_GOT_TPREL16_LO | |
6417 | || r_type == elfcpp::R_POWERPC_GOT_TPREL16_HI | |
6418 | || r_type == elfcpp::R_POWERPC_GOT_TPREL16_HA) | |
6419 | { | |
6420 | // First instruction of initial exec sequence. | |
6421 | const bool final = gsym == NULL || gsym->final_value_is_known(); | |
6422 | const tls::Tls_optimization tls_type = target->optimize_tls_ie(final); | |
6423 | if (tls_type == tls::TLSOPT_NONE) | |
6424 | { | |
6425 | if (gsym != NULL) | |
6426 | { | |
6427 | gold_assert(gsym->has_got_offset(GOT_TYPE_TPREL)); | |
6428 | value = gsym->got_offset(GOT_TYPE_TPREL); | |
6429 | } | |
6430 | else | |
6431 | { | |
6432 | unsigned int r_sym = elfcpp::elf_r_sym<size>(rela.get_r_info()); | |
6433 | gold_assert(object->local_has_got_offset(r_sym, GOT_TYPE_TPREL)); | |
6434 | value = object->local_got_offset(r_sym, GOT_TYPE_TPREL); | |
6435 | } | |
6436 | value -= target->got_section()->got_base_offset(object); | |
6437 | } | |
6438 | else | |
6439 | { | |
6440 | gold_assert(tls_type == tls::TLSOPT_TO_LE); | |
6441 | if (r_type == elfcpp::R_POWERPC_GOT_TPREL16 | |
6442 | || r_type == elfcpp::R_POWERPC_GOT_TPREL16_LO) | |
6443 | { | |
6444 | Insn* iview = reinterpret_cast<Insn*>(view - 2 * big_endian); | |
6445 | Insn insn = elfcpp::Swap<32, big_endian>::readval(iview); | |
6446 | insn &= (1 << 26) - (1 << 21); // extract rt from ld | |
6447 | if (size == 32) | |
6448 | insn |= addis_0_2; | |
6449 | else | |
6450 | insn |= addis_0_13; | |
6451 | elfcpp::Swap<32, big_endian>::writeval(iview, insn); | |
6452 | r_type = elfcpp::R_POWERPC_TPREL16_HA; | |
6453 | value = psymval->value(object, rela.get_r_addend()); | |
6454 | } | |
6455 | else | |
6456 | { | |
6457 | Insn* iview = reinterpret_cast<Insn*>(view - 2 * big_endian); | |
6458 | Insn insn = nop; | |
6459 | elfcpp::Swap<32, big_endian>::writeval(iview, insn); | |
6460 | r_type = elfcpp::R_POWERPC_NONE; | |
6461 | } | |
6462 | } | |
6463 | } | |
6464 | else if ((size == 64 && r_type == elfcpp::R_PPC64_TLSGD) | |
6465 | || (size == 32 && r_type == elfcpp::R_PPC_TLSGD)) | |
6466 | { | |
6467 | // Second instruction of a global dynamic sequence, | |
6468 | // the __tls_get_addr call | |
e3deeb9c | 6469 | this->expect_tls_get_addr_call(relinfo, relnum, rela.get_r_offset()); |
dd93cd0a AM |
6470 | const bool final = gsym == NULL || gsym->final_value_is_known(); |
6471 | const tls::Tls_optimization tls_type = target->optimize_tls_gd(final); | |
6472 | if (tls_type != tls::TLSOPT_NONE) | |
6473 | { | |
6474 | if (tls_type == tls::TLSOPT_TO_IE) | |
6475 | { | |
6476 | Insn* iview = reinterpret_cast<Insn*>(view); | |
6477 | Insn insn = add_3_3_13; | |
6478 | if (size == 32) | |
6479 | insn = add_3_3_2; | |
6480 | elfcpp::Swap<32, big_endian>::writeval(iview, insn); | |
6481 | r_type = elfcpp::R_POWERPC_NONE; | |
6482 | } | |
6483 | else | |
6484 | { | |
6485 | Insn* iview = reinterpret_cast<Insn*>(view); | |
6486 | Insn insn = addi_3_3; | |
6487 | elfcpp::Swap<32, big_endian>::writeval(iview, insn); | |
6488 | r_type = elfcpp::R_POWERPC_TPREL16_LO; | |
6489 | view += 2 * big_endian; | |
6490 | value = psymval->value(object, rela.get_r_addend()); | |
6491 | } | |
e3deeb9c | 6492 | this->skip_next_tls_get_addr_call(); |
dd93cd0a AM |
6493 | } |
6494 | } | |
6495 | else if ((size == 64 && r_type == elfcpp::R_PPC64_TLSLD) | |
6496 | || (size == 32 && r_type == elfcpp::R_PPC_TLSLD)) | |
6497 | { | |
6498 | // Second instruction of a local dynamic sequence, | |
6499 | // the __tls_get_addr call | |
e3deeb9c | 6500 | this->expect_tls_get_addr_call(relinfo, relnum, rela.get_r_offset()); |
dd93cd0a AM |
6501 | const tls::Tls_optimization tls_type = target->optimize_tls_ld(); |
6502 | if (tls_type == tls::TLSOPT_TO_LE) | |
6503 | { | |
6504 | Insn* iview = reinterpret_cast<Insn*>(view); | |
6505 | Insn insn = addi_3_3; | |
6506 | elfcpp::Swap<32, big_endian>::writeval(iview, insn); | |
e3deeb9c | 6507 | this->skip_next_tls_get_addr_call(); |
dd93cd0a AM |
6508 | r_type = elfcpp::R_POWERPC_TPREL16_LO; |
6509 | view += 2 * big_endian; | |
7404fe1b | 6510 | value = dtp_offset; |
dd93cd0a AM |
6511 | } |
6512 | } | |
6513 | else if (r_type == elfcpp::R_POWERPC_TLS) | |
6514 | { | |
6515 | // Second instruction of an initial exec sequence | |
6516 | const bool final = gsym == NULL || gsym->final_value_is_known(); | |
6517 | const tls::Tls_optimization tls_type = target->optimize_tls_ie(final); | |
6518 | if (tls_type == tls::TLSOPT_TO_LE) | |
6519 | { | |
6520 | Insn* iview = reinterpret_cast<Insn*>(view); | |
6521 | Insn insn = elfcpp::Swap<32, big_endian>::readval(iview); | |
6522 | unsigned int reg = size == 32 ? 2 : 13; | |
6523 | insn = at_tls_transform(insn, reg); | |
6524 | gold_assert(insn != 0); | |
6525 | elfcpp::Swap<32, big_endian>::writeval(iview, insn); | |
6526 | r_type = elfcpp::R_POWERPC_TPREL16_LO; | |
6527 | view += 2 * big_endian; | |
6528 | value = psymval->value(object, rela.get_r_addend()); | |
6529 | } | |
6530 | } | |
c9824451 | 6531 | else if (!has_plt_value) |
cf43a2fe | 6532 | { |
dd93cd0a | 6533 | Address addend = 0; |
3ea0a085 | 6534 | unsigned int dest_shndx; |
cf43a2fe AM |
6535 | if (r_type != elfcpp::R_PPC_PLTREL24) |
6536 | addend = rela.get_r_addend(); | |
c9824451 | 6537 | value = psymval->value(object, addend); |
dd93cd0a | 6538 | if (size == 64 && is_branch_reloc(r_type)) |
6c77229c AM |
6539 | value = target->symval_for_branch(relinfo->symtab, value, |
6540 | gsym, object, &dest_shndx); | |
ec661b9d AM |
6541 | unsigned int max_branch_offset = 0; |
6542 | if (r_type == elfcpp::R_POWERPC_REL24 | |
6543 | || r_type == elfcpp::R_PPC_PLTREL24 | |
6544 | || r_type == elfcpp::R_PPC_LOCAL24PC) | |
6545 | max_branch_offset = 1 << 25; | |
6546 | else if (r_type == elfcpp::R_POWERPC_REL14 | |
6547 | || r_type == elfcpp::R_POWERPC_REL14_BRTAKEN | |
6548 | || r_type == elfcpp::R_POWERPC_REL14_BRNTAKEN) | |
6549 | max_branch_offset = 1 << 15; | |
6550 | if (max_branch_offset != 0 | |
6551 | && value - address + max_branch_offset >= 2 * max_branch_offset) | |
6552 | { | |
6553 | Stub_table<size, big_endian>* stub_table | |
6554 | = object->stub_table(relinfo->data_shndx); | |
6555 | gold_assert(stub_table != NULL); | |
6556 | Address off = stub_table->find_long_branch_entry(object, value); | |
6557 | if (off != invalid_address) | |
6558 | value = stub_table->stub_address() + stub_table->plt_size() + off; | |
6559 | } | |
42cacb20 DE |
6560 | } |
6561 | ||
42cacb20 DE |
6562 | switch (r_type) |
6563 | { | |
dd93cd0a AM |
6564 | case elfcpp::R_PPC64_REL64: |
6565 | case elfcpp::R_POWERPC_REL32: | |
6566 | case elfcpp::R_POWERPC_REL24: | |
6567 | case elfcpp::R_PPC_PLTREL24: | |
6568 | case elfcpp::R_PPC_LOCAL24PC: | |
6569 | case elfcpp::R_POWERPC_REL16: | |
6570 | case elfcpp::R_POWERPC_REL16_LO: | |
6571 | case elfcpp::R_POWERPC_REL16_HI: | |
6572 | case elfcpp::R_POWERPC_REL16_HA: | |
6573 | case elfcpp::R_POWERPC_REL14: | |
6574 | case elfcpp::R_POWERPC_REL14_BRTAKEN: | |
6575 | case elfcpp::R_POWERPC_REL14_BRNTAKEN: | |
6576 | value -= address; | |
6577 | break; | |
6578 | ||
42cacb20 DE |
6579 | case elfcpp::R_PPC64_TOC16: |
6580 | case elfcpp::R_PPC64_TOC16_LO: | |
6581 | case elfcpp::R_PPC64_TOC16_HI: | |
6582 | case elfcpp::R_PPC64_TOC16_HA: | |
6583 | case elfcpp::R_PPC64_TOC16_DS: | |
6584 | case elfcpp::R_PPC64_TOC16_LO_DS: | |
cf43a2fe | 6585 | // Subtract the TOC base address. |
c9269dff | 6586 | value -= (target->got_section()->output_section()->address() |
dd93cd0a | 6587 | + object->toc_base_offset()); |
42cacb20 DE |
6588 | break; |
6589 | ||
cf43a2fe AM |
6590 | case elfcpp::R_POWERPC_SECTOFF: |
6591 | case elfcpp::R_POWERPC_SECTOFF_LO: | |
6592 | case elfcpp::R_POWERPC_SECTOFF_HI: | |
6593 | case elfcpp::R_POWERPC_SECTOFF_HA: | |
6594 | case elfcpp::R_PPC64_SECTOFF_DS: | |
6595 | case elfcpp::R_PPC64_SECTOFF_LO_DS: | |
6596 | if (os != NULL) | |
6597 | value -= os->address(); | |
42cacb20 DE |
6598 | break; |
6599 | ||
dd93cd0a AM |
6600 | case elfcpp::R_PPC64_TPREL16_DS: |
6601 | case elfcpp::R_PPC64_TPREL16_LO_DS: | |
6602 | if (size != 64) | |
6603 | // R_PPC_TLSGD and R_PPC_TLSLD | |
6604 | break; | |
6605 | case elfcpp::R_POWERPC_TPREL16: | |
6606 | case elfcpp::R_POWERPC_TPREL16_LO: | |
6607 | case elfcpp::R_POWERPC_TPREL16_HI: | |
6608 | case elfcpp::R_POWERPC_TPREL16_HA: | |
6609 | case elfcpp::R_POWERPC_TPREL: | |
6610 | case elfcpp::R_PPC64_TPREL16_HIGHER: | |
6611 | case elfcpp::R_PPC64_TPREL16_HIGHERA: | |
6612 | case elfcpp::R_PPC64_TPREL16_HIGHEST: | |
6613 | case elfcpp::R_PPC64_TPREL16_HIGHESTA: | |
6614 | // tls symbol values are relative to tls_segment()->vaddr() | |
6615 | value -= tp_offset; | |
6616 | break; | |
6617 | ||
6618 | case elfcpp::R_PPC64_DTPREL16_DS: | |
6619 | case elfcpp::R_PPC64_DTPREL16_LO_DS: | |
6620 | case elfcpp::R_PPC64_DTPREL16_HIGHER: | |
6621 | case elfcpp::R_PPC64_DTPREL16_HIGHERA: | |
6622 | case elfcpp::R_PPC64_DTPREL16_HIGHEST: | |
6623 | case elfcpp::R_PPC64_DTPREL16_HIGHESTA: | |
6624 | if (size != 64) | |
6625 | // R_PPC_EMB_NADDR32, R_PPC_EMB_NADDR16, R_PPC_EMB_NADDR16_LO | |
6626 | // R_PPC_EMB_NADDR16_HI, R_PPC_EMB_NADDR16_HA, R_PPC_EMB_SDAI16 | |
6627 | break; | |
6628 | case elfcpp::R_POWERPC_DTPREL16: | |
6629 | case elfcpp::R_POWERPC_DTPREL16_LO: | |
6630 | case elfcpp::R_POWERPC_DTPREL16_HI: | |
6631 | case elfcpp::R_POWERPC_DTPREL16_HA: | |
6632 | case elfcpp::R_POWERPC_DTPREL: | |
6633 | // tls symbol values are relative to tls_segment()->vaddr() | |
6634 | value -= dtp_offset; | |
6635 | break; | |
6636 | ||
42cacb20 DE |
6637 | default: |
6638 | break; | |
6639 | } | |
6640 | ||
dd93cd0a | 6641 | Insn branch_bit = 0; |
42cacb20 DE |
6642 | switch (r_type) |
6643 | { | |
dd93cd0a AM |
6644 | case elfcpp::R_POWERPC_ADDR14_BRTAKEN: |
6645 | case elfcpp::R_POWERPC_REL14_BRTAKEN: | |
6646 | branch_bit = 1 << 21; | |
6647 | case elfcpp::R_POWERPC_ADDR14_BRNTAKEN: | |
6648 | case elfcpp::R_POWERPC_REL14_BRNTAKEN: | |
6649 | { | |
6650 | Insn* iview = reinterpret_cast<Insn*>(view); | |
6651 | Insn insn = elfcpp::Swap<32, big_endian>::readval(iview); | |
6652 | insn &= ~(1 << 21); | |
6653 | insn |= branch_bit; | |
6654 | if (this->is_isa_v2) | |
6655 | { | |
6656 | // Set 'a' bit. This is 0b00010 in BO field for branch | |
6657 | // on CR(BI) insns (BO == 001at or 011at), and 0b01000 | |
6658 | // for branch on CTR insns (BO == 1a00t or 1a01t). | |
6659 | if ((insn & (0x14 << 21)) == (0x04 << 21)) | |
6660 | insn |= 0x02 << 21; | |
6661 | else if ((insn & (0x14 << 21)) == (0x10 << 21)) | |
6662 | insn |= 0x08 << 21; | |
6663 | else | |
6664 | break; | |
6665 | } | |
6666 | else | |
6667 | { | |
6668 | // Invert 'y' bit if not the default. | |
6669 | if (static_cast<Signed_address>(value) < 0) | |
6670 | insn ^= 1 << 21; | |
6671 | } | |
6672 | elfcpp::Swap<32, big_endian>::writeval(iview, insn); | |
6673 | } | |
6674 | break; | |
6675 | ||
6676 | default: | |
6677 | break; | |
6678 | } | |
6679 | ||
aba6bc71 AM |
6680 | if (size == 64) |
6681 | { | |
6682 | // Multi-instruction sequences that access the TOC can be | |
6683 | // optimized, eg. addis ra,r2,0; addi rb,ra,x; | |
6684 | // to nop; addi rb,r2,x; | |
6685 | switch (r_type) | |
6686 | { | |
6687 | default: | |
6688 | break; | |
6689 | ||
6690 | case elfcpp::R_POWERPC_GOT_TLSLD16_HA: | |
6691 | case elfcpp::R_POWERPC_GOT_TLSGD16_HA: | |
6692 | case elfcpp::R_POWERPC_GOT_TPREL16_HA: | |
6693 | case elfcpp::R_POWERPC_GOT_DTPREL16_HA: | |
6694 | case elfcpp::R_POWERPC_GOT16_HA: | |
6695 | case elfcpp::R_PPC64_TOC16_HA: | |
d8f5a274 | 6696 | if (parameters->options().toc_optimize()) |
aba6bc71 AM |
6697 | { |
6698 | Insn* iview = reinterpret_cast<Insn*>(view - 2 * big_endian); | |
6699 | Insn insn = elfcpp::Swap<32, big_endian>::readval(iview); | |
6700 | if ((insn & ((0x3f << 26) | 0x1f << 16)) | |
6701 | != ((15u << 26) | (2 << 16)) /* addis rt,2,imm */) | |
6702 | gold_error_at_location(relinfo, relnum, rela.get_r_offset(), | |
6703 | _("toc optimization is not supported " | |
6704 | "for %#08x instruction"), insn); | |
6705 | else if (value + 0x8000 < 0x10000) | |
6706 | { | |
6707 | elfcpp::Swap<32, big_endian>::writeval(iview, nop); | |
6708 | return true; | |
6709 | } | |
6710 | } | |
6711 | break; | |
6712 | ||
6713 | case elfcpp::R_POWERPC_GOT_TLSLD16_LO: | |
6714 | case elfcpp::R_POWERPC_GOT_TLSGD16_LO: | |
6715 | case elfcpp::R_POWERPC_GOT_TPREL16_LO: | |
6716 | case elfcpp::R_POWERPC_GOT_DTPREL16_LO: | |
6717 | case elfcpp::R_POWERPC_GOT16_LO: | |
6718 | case elfcpp::R_PPC64_GOT16_LO_DS: | |
6719 | case elfcpp::R_PPC64_TOC16_LO: | |
6720 | case elfcpp::R_PPC64_TOC16_LO_DS: | |
d8f5a274 | 6721 | if (parameters->options().toc_optimize()) |
aba6bc71 AM |
6722 | { |
6723 | Insn* iview = reinterpret_cast<Insn*>(view - 2 * big_endian); | |
6724 | Insn insn = elfcpp::Swap<32, big_endian>::readval(iview); | |
6725 | if (!ok_lo_toc_insn(insn)) | |
6726 | gold_error_at_location(relinfo, relnum, rela.get_r_offset(), | |
6727 | _("toc optimization is not supported " | |
6728 | "for %#08x instruction"), insn); | |
6729 | else if (value + 0x8000 < 0x10000) | |
6730 | { | |
6731 | if ((insn & (0x3f << 26)) == 12u << 26 /* addic */) | |
6732 | { | |
6733 | // Transform addic to addi when we change reg. | |
6734 | insn &= ~((0x3f << 26) | (0x1f << 16)); | |
6735 | insn |= (14u << 26) | (2 << 16); | |
6736 | } | |
6737 | else | |
6738 | { | |
6739 | insn &= ~(0x1f << 16); | |
6740 | insn |= 2 << 16; | |
6741 | } | |
6742 | elfcpp::Swap<32, big_endian>::writeval(iview, insn); | |
6743 | } | |
6744 | } | |
6745 | break; | |
6746 | } | |
6747 | } | |
6748 | ||
f4baf0d4 | 6749 | typename Reloc::Overflow_check overflow = Reloc::CHECK_NONE; |
dd93cd0a AM |
6750 | switch (r_type) |
6751 | { | |
6752 | case elfcpp::R_POWERPC_ADDR32: | |
6753 | case elfcpp::R_POWERPC_UADDR32: | |
6754 | if (size == 64) | |
f4baf0d4 | 6755 | overflow = Reloc::CHECK_BITFIELD; |
42cacb20 DE |
6756 | break; |
6757 | ||
6758 | case elfcpp::R_POWERPC_REL32: | |
dd93cd0a | 6759 | if (size == 64) |
f4baf0d4 | 6760 | overflow = Reloc::CHECK_SIGNED; |
dd93cd0a AM |
6761 | break; |
6762 | ||
6763 | case elfcpp::R_POWERPC_ADDR24: | |
6764 | case elfcpp::R_POWERPC_ADDR16: | |
6765 | case elfcpp::R_POWERPC_UADDR16: | |
6766 | case elfcpp::R_PPC64_ADDR16_DS: | |
6767 | case elfcpp::R_POWERPC_ADDR14: | |
6768 | case elfcpp::R_POWERPC_ADDR14_BRTAKEN: | |
6769 | case elfcpp::R_POWERPC_ADDR14_BRNTAKEN: | |
f4baf0d4 | 6770 | overflow = Reloc::CHECK_BITFIELD; |
42cacb20 DE |
6771 | break; |
6772 | ||
6773 | case elfcpp::R_POWERPC_REL24: | |
42cacb20 | 6774 | case elfcpp::R_PPC_PLTREL24: |
cf43a2fe | 6775 | case elfcpp::R_PPC_LOCAL24PC: |
dd93cd0a AM |
6776 | case elfcpp::R_POWERPC_REL16: |
6777 | case elfcpp::R_PPC64_TOC16: | |
6778 | case elfcpp::R_POWERPC_GOT16: | |
6779 | case elfcpp::R_POWERPC_SECTOFF: | |
6780 | case elfcpp::R_POWERPC_TPREL16: | |
6781 | case elfcpp::R_POWERPC_DTPREL16: | |
6782 | case elfcpp::R_PPC64_TPREL16_DS: | |
6783 | case elfcpp::R_PPC64_DTPREL16_DS: | |
6784 | case elfcpp::R_PPC64_TOC16_DS: | |
6785 | case elfcpp::R_PPC64_GOT16_DS: | |
6786 | case elfcpp::R_PPC64_SECTOFF_DS: | |
6787 | case elfcpp::R_POWERPC_REL14: | |
6788 | case elfcpp::R_POWERPC_REL14_BRTAKEN: | |
6789 | case elfcpp::R_POWERPC_REL14_BRNTAKEN: | |
6790 | case elfcpp::R_POWERPC_GOT_TLSGD16: | |
6791 | case elfcpp::R_POWERPC_GOT_TLSLD16: | |
6792 | case elfcpp::R_POWERPC_GOT_TPREL16: | |
6793 | case elfcpp::R_POWERPC_GOT_DTPREL16: | |
f4baf0d4 | 6794 | overflow = Reloc::CHECK_SIGNED; |
42cacb20 | 6795 | break; |
dd93cd0a | 6796 | } |
42cacb20 | 6797 | |
3ea0a085 | 6798 | typename Powerpc_relocate_functions<size, big_endian>::Status status |
f4baf0d4 | 6799 | = Powerpc_relocate_functions<size, big_endian>::STATUS_OK; |
dd93cd0a AM |
6800 | switch (r_type) |
6801 | { | |
6802 | case elfcpp::R_POWERPC_NONE: | |
6803 | case elfcpp::R_POWERPC_TLS: | |
6804 | case elfcpp::R_POWERPC_GNU_VTINHERIT: | |
6805 | case elfcpp::R_POWERPC_GNU_VTENTRY: | |
6806 | case elfcpp::R_PPC_EMB_MRKREF: | |
42cacb20 DE |
6807 | break; |
6808 | ||
6809 | case elfcpp::R_PPC64_ADDR64: | |
dd93cd0a | 6810 | case elfcpp::R_PPC64_REL64: |
cf43a2fe | 6811 | case elfcpp::R_PPC64_TOC: |
dd93cd0a AM |
6812 | Reloc::addr64(view, value); |
6813 | break; | |
6814 | ||
6815 | case elfcpp::R_POWERPC_TPREL: | |
6816 | case elfcpp::R_POWERPC_DTPREL: | |
6817 | if (size == 64) | |
6818 | Reloc::addr64(view, value); | |
6819 | else | |
3ea0a085 | 6820 | status = Reloc::addr32(view, value, overflow); |
dd93cd0a AM |
6821 | break; |
6822 | ||
6823 | case elfcpp::R_PPC64_UADDR64: | |
6824 | Reloc::addr64_u(view, value); | |
42cacb20 DE |
6825 | break; |
6826 | ||
6827 | case elfcpp::R_POWERPC_ADDR32: | |
3ea0a085 | 6828 | status = Reloc::addr32(view, value, overflow); |
dd93cd0a AM |
6829 | break; |
6830 | ||
acc276d8 | 6831 | case elfcpp::R_POWERPC_REL32: |
dd93cd0a | 6832 | case elfcpp::R_POWERPC_UADDR32: |
3ea0a085 | 6833 | status = Reloc::addr32_u(view, value, overflow); |
dd93cd0a AM |
6834 | break; |
6835 | ||
6836 | case elfcpp::R_POWERPC_ADDR24: | |
6837 | case elfcpp::R_POWERPC_REL24: | |
6838 | case elfcpp::R_PPC_PLTREL24: | |
6839 | case elfcpp::R_PPC_LOCAL24PC: | |
3ea0a085 | 6840 | status = Reloc::addr24(view, value, overflow); |
42cacb20 DE |
6841 | break; |
6842 | ||
dd93cd0a AM |
6843 | case elfcpp::R_POWERPC_GOT_DTPREL16: |
6844 | case elfcpp::R_POWERPC_GOT_DTPREL16_LO: | |
6845 | if (size == 64) | |
6846 | { | |
3ea0a085 | 6847 | status = Reloc::addr16_ds(view, value, overflow); |
dd93cd0a AM |
6848 | break; |
6849 | } | |
cf43a2fe | 6850 | case elfcpp::R_POWERPC_ADDR16: |
dd93cd0a | 6851 | case elfcpp::R_POWERPC_REL16: |
cf43a2fe | 6852 | case elfcpp::R_PPC64_TOC16: |
42cacb20 | 6853 | case elfcpp::R_POWERPC_GOT16: |
cf43a2fe | 6854 | case elfcpp::R_POWERPC_SECTOFF: |
dd93cd0a AM |
6855 | case elfcpp::R_POWERPC_TPREL16: |
6856 | case elfcpp::R_POWERPC_DTPREL16: | |
6857 | case elfcpp::R_POWERPC_GOT_TLSGD16: | |
6858 | case elfcpp::R_POWERPC_GOT_TLSLD16: | |
6859 | case elfcpp::R_POWERPC_GOT_TPREL16: | |
cf43a2fe | 6860 | case elfcpp::R_POWERPC_ADDR16_LO: |
dd93cd0a | 6861 | case elfcpp::R_POWERPC_REL16_LO: |
cf43a2fe | 6862 | case elfcpp::R_PPC64_TOC16_LO: |
42cacb20 | 6863 | case elfcpp::R_POWERPC_GOT16_LO: |
cf43a2fe | 6864 | case elfcpp::R_POWERPC_SECTOFF_LO: |
dd93cd0a AM |
6865 | case elfcpp::R_POWERPC_TPREL16_LO: |
6866 | case elfcpp::R_POWERPC_DTPREL16_LO: | |
6867 | case elfcpp::R_POWERPC_GOT_TLSGD16_LO: | |
6868 | case elfcpp::R_POWERPC_GOT_TLSLD16_LO: | |
6869 | case elfcpp::R_POWERPC_GOT_TPREL16_LO: | |
3ea0a085 | 6870 | status = Reloc::addr16(view, value, overflow); |
dd93cd0a AM |
6871 | break; |
6872 | ||
6873 | case elfcpp::R_POWERPC_UADDR16: | |
3ea0a085 | 6874 | status = Reloc::addr16_u(view, value, overflow); |
42cacb20 DE |
6875 | break; |
6876 | ||
cf43a2fe | 6877 | case elfcpp::R_POWERPC_ADDR16_HI: |
dd93cd0a | 6878 | case elfcpp::R_POWERPC_REL16_HI: |
cf43a2fe | 6879 | case elfcpp::R_PPC64_TOC16_HI: |
42cacb20 | 6880 | case elfcpp::R_POWERPC_GOT16_HI: |
cf43a2fe | 6881 | case elfcpp::R_POWERPC_SECTOFF_HI: |
dd93cd0a AM |
6882 | case elfcpp::R_POWERPC_TPREL16_HI: |
6883 | case elfcpp::R_POWERPC_DTPREL16_HI: | |
6884 | case elfcpp::R_POWERPC_GOT_TLSGD16_HI: | |
6885 | case elfcpp::R_POWERPC_GOT_TLSLD16_HI: | |
6886 | case elfcpp::R_POWERPC_GOT_TPREL16_HI: | |
6887 | case elfcpp::R_POWERPC_GOT_DTPREL16_HI: | |
6888 | Reloc::addr16_hi(view, value); | |
42cacb20 DE |
6889 | break; |
6890 | ||
cf43a2fe | 6891 | case elfcpp::R_POWERPC_ADDR16_HA: |
dd93cd0a | 6892 | case elfcpp::R_POWERPC_REL16_HA: |
cf43a2fe | 6893 | case elfcpp::R_PPC64_TOC16_HA: |
42cacb20 | 6894 | case elfcpp::R_POWERPC_GOT16_HA: |
cf43a2fe | 6895 | case elfcpp::R_POWERPC_SECTOFF_HA: |
dd93cd0a AM |
6896 | case elfcpp::R_POWERPC_TPREL16_HA: |
6897 | case elfcpp::R_POWERPC_DTPREL16_HA: | |
6898 | case elfcpp::R_POWERPC_GOT_TLSGD16_HA: | |
6899 | case elfcpp::R_POWERPC_GOT_TLSLD16_HA: | |
6900 | case elfcpp::R_POWERPC_GOT_TPREL16_HA: | |
6901 | case elfcpp::R_POWERPC_GOT_DTPREL16_HA: | |
6902 | Reloc::addr16_ha(view, value); | |
42cacb20 DE |
6903 | break; |
6904 | ||
dd93cd0a AM |
6905 | case elfcpp::R_PPC64_DTPREL16_HIGHER: |
6906 | if (size == 32) | |
6907 | // R_PPC_EMB_NADDR16_LO | |
6908 | goto unsupp; | |
6909 | case elfcpp::R_PPC64_ADDR16_HIGHER: | |
6910 | case elfcpp::R_PPC64_TPREL16_HIGHER: | |
6911 | Reloc::addr16_hi2(view, value); | |
42cacb20 DE |
6912 | break; |
6913 | ||
dd93cd0a AM |
6914 | case elfcpp::R_PPC64_DTPREL16_HIGHERA: |
6915 | if (size == 32) | |
6916 | // R_PPC_EMB_NADDR16_HI | |
6917 | goto unsupp; | |
6918 | case elfcpp::R_PPC64_ADDR16_HIGHERA: | |
6919 | case elfcpp::R_PPC64_TPREL16_HIGHERA: | |
6920 | Reloc::addr16_ha2(view, value); | |
42cacb20 DE |
6921 | break; |
6922 | ||
dd93cd0a AM |
6923 | case elfcpp::R_PPC64_DTPREL16_HIGHEST: |
6924 | if (size == 32) | |
6925 | // R_PPC_EMB_NADDR16_HA | |
6926 | goto unsupp; | |
6927 | case elfcpp::R_PPC64_ADDR16_HIGHEST: | |
6928 | case elfcpp::R_PPC64_TPREL16_HIGHEST: | |
6929 | Reloc::addr16_hi3(view, value); | |
42cacb20 DE |
6930 | break; |
6931 | ||
dd93cd0a AM |
6932 | case elfcpp::R_PPC64_DTPREL16_HIGHESTA: |
6933 | if (size == 32) | |
6934 | // R_PPC_EMB_SDAI16 | |
6935 | goto unsupp; | |
6936 | case elfcpp::R_PPC64_ADDR16_HIGHESTA: | |
6937 | case elfcpp::R_PPC64_TPREL16_HIGHESTA: | |
6938 | Reloc::addr16_ha3(view, value); | |
6939 | break; | |
6940 | ||
6941 | case elfcpp::R_PPC64_DTPREL16_DS: | |
6942 | case elfcpp::R_PPC64_DTPREL16_LO_DS: | |
6943 | if (size == 32) | |
6944 | // R_PPC_EMB_NADDR32, R_PPC_EMB_NADDR16 | |
6945 | goto unsupp; | |
6946 | case elfcpp::R_PPC64_TPREL16_DS: | |
6947 | case elfcpp::R_PPC64_TPREL16_LO_DS: | |
6948 | if (size == 32) | |
6949 | // R_PPC_TLSGD, R_PPC_TLSLD | |
6950 | break; | |
cf43a2fe AM |
6951 | case elfcpp::R_PPC64_ADDR16_DS: |
6952 | case elfcpp::R_PPC64_ADDR16_LO_DS: | |
42cacb20 DE |
6953 | case elfcpp::R_PPC64_TOC16_DS: |
6954 | case elfcpp::R_PPC64_TOC16_LO_DS: | |
cf43a2fe AM |
6955 | case elfcpp::R_PPC64_GOT16_DS: |
6956 | case elfcpp::R_PPC64_GOT16_LO_DS: | |
6957 | case elfcpp::R_PPC64_SECTOFF_DS: | |
6958 | case elfcpp::R_PPC64_SECTOFF_LO_DS: | |
3ea0a085 | 6959 | status = Reloc::addr16_ds(view, value, overflow); |
dd93cd0a AM |
6960 | break; |
6961 | ||
6962 | case elfcpp::R_POWERPC_ADDR14: | |
6963 | case elfcpp::R_POWERPC_ADDR14_BRTAKEN: | |
6964 | case elfcpp::R_POWERPC_ADDR14_BRNTAKEN: | |
6965 | case elfcpp::R_POWERPC_REL14: | |
6966 | case elfcpp::R_POWERPC_REL14_BRTAKEN: | |
6967 | case elfcpp::R_POWERPC_REL14_BRNTAKEN: | |
3ea0a085 | 6968 | status = Reloc::addr14(view, value, overflow); |
42cacb20 DE |
6969 | break; |
6970 | ||
6971 | case elfcpp::R_POWERPC_COPY: | |
6972 | case elfcpp::R_POWERPC_GLOB_DAT: | |
6973 | case elfcpp::R_POWERPC_JMP_SLOT: | |
6974 | case elfcpp::R_POWERPC_RELATIVE: | |
42cacb20 | 6975 | case elfcpp::R_POWERPC_DTPMOD: |
dd93cd0a AM |
6976 | case elfcpp::R_PPC64_JMP_IREL: |
6977 | case elfcpp::R_POWERPC_IRELATIVE: | |
42cacb20 DE |
6978 | gold_error_at_location(relinfo, relnum, rela.get_r_offset(), |
6979 | _("unexpected reloc %u in object file"), | |
6980 | r_type); | |
6981 | break; | |
6982 | ||
dd93cd0a AM |
6983 | case elfcpp::R_PPC_EMB_SDA21: |
6984 | if (size == 32) | |
6985 | goto unsupp; | |
6986 | else | |
6987 | { | |
6988 | // R_PPC64_TOCSAVE. For the time being this can be ignored. | |
6989 | } | |
6990 | break; | |
6991 | ||
6992 | case elfcpp::R_PPC_EMB_SDA2I16: | |
6993 | case elfcpp::R_PPC_EMB_SDA2REL: | |
6994 | if (size == 32) | |
6995 | goto unsupp; | |
6996 | // R_PPC64_TLSGD, R_PPC64_TLSLD | |
6ce78956 AM |
6997 | break; |
6998 | ||
dd93cd0a AM |
6999 | case elfcpp::R_POWERPC_PLT32: |
7000 | case elfcpp::R_POWERPC_PLTREL32: | |
7001 | case elfcpp::R_POWERPC_PLT16_LO: | |
7002 | case elfcpp::R_POWERPC_PLT16_HI: | |
7003 | case elfcpp::R_POWERPC_PLT16_HA: | |
7004 | case elfcpp::R_PPC_SDAREL16: | |
7005 | case elfcpp::R_POWERPC_ADDR30: | |
7006 | case elfcpp::R_PPC64_PLT64: | |
7007 | case elfcpp::R_PPC64_PLTREL64: | |
7008 | case elfcpp::R_PPC64_PLTGOT16: | |
7009 | case elfcpp::R_PPC64_PLTGOT16_LO: | |
7010 | case elfcpp::R_PPC64_PLTGOT16_HI: | |
7011 | case elfcpp::R_PPC64_PLTGOT16_HA: | |
7012 | case elfcpp::R_PPC64_PLT16_LO_DS: | |
7013 | case elfcpp::R_PPC64_PLTGOT16_DS: | |
7014 | case elfcpp::R_PPC64_PLTGOT16_LO_DS: | |
7015 | case elfcpp::R_PPC_EMB_RELSEC16: | |
7016 | case elfcpp::R_PPC_EMB_RELST_LO: | |
7017 | case elfcpp::R_PPC_EMB_RELST_HI: | |
7018 | case elfcpp::R_PPC_EMB_RELST_HA: | |
7019 | case elfcpp::R_PPC_EMB_BIT_FLD: | |
7020 | case elfcpp::R_PPC_EMB_RELSDA: | |
7021 | case elfcpp::R_PPC_TOC16: | |
42cacb20 | 7022 | default: |
dd93cd0a | 7023 | unsupp: |
42cacb20 DE |
7024 | gold_error_at_location(relinfo, relnum, rela.get_r_offset(), |
7025 | _("unsupported reloc %u"), | |
7026 | r_type); | |
7027 | break; | |
7028 | } | |
f4baf0d4 | 7029 | if (status != Powerpc_relocate_functions<size, big_endian>::STATUS_OK) |
3ea0a085 AM |
7030 | gold_error_at_location(relinfo, relnum, rela.get_r_offset(), |
7031 | _("relocation overflow")); | |
42cacb20 DE |
7032 | |
7033 | return true; | |
7034 | } | |
7035 | ||
42cacb20 DE |
7036 | // Relocate section data. |
7037 | ||
7038 | template<int size, bool big_endian> | |
7039 | void | |
7040 | Target_powerpc<size, big_endian>::relocate_section( | |
d83ce4e3 AM |
7041 | const Relocate_info<size, big_endian>* relinfo, |
7042 | unsigned int sh_type, | |
7043 | const unsigned char* prelocs, | |
7044 | size_t reloc_count, | |
7045 | Output_section* output_section, | |
7046 | bool needs_special_offset_handling, | |
7047 | unsigned char* view, | |
c9269dff | 7048 | Address address, |
d83ce4e3 AM |
7049 | section_size_type view_size, |
7050 | const Reloc_symbol_changes* reloc_symbol_changes) | |
42cacb20 DE |
7051 | { |
7052 | typedef Target_powerpc<size, big_endian> Powerpc; | |
7053 | typedef typename Target_powerpc<size, big_endian>::Relocate Powerpc_relocate; | |
168a4726 AM |
7054 | typedef typename Target_powerpc<size, big_endian>::Relocate_comdat_behavior |
7055 | Powerpc_comdat_behavior; | |
42cacb20 DE |
7056 | |
7057 | gold_assert(sh_type == elfcpp::SHT_RELA); | |
7058 | ||
7059 | gold::relocate_section<size, big_endian, Powerpc, elfcpp::SHT_RELA, | |
168a4726 | 7060 | Powerpc_relocate, Powerpc_comdat_behavior>( |
42cacb20 DE |
7061 | relinfo, |
7062 | this, | |
7063 | prelocs, | |
7064 | reloc_count, | |
7065 | output_section, | |
7066 | needs_special_offset_handling, | |
7067 | view, | |
7068 | address, | |
364c7fa5 ILT |
7069 | view_size, |
7070 | reloc_symbol_changes); | |
42cacb20 DE |
7071 | } |
7072 | ||
cf43a2fe | 7073 | class Powerpc_scan_relocatable_reloc |
42cacb20 | 7074 | { |
cf43a2fe AM |
7075 | public: |
7076 | // Return the strategy to use for a local symbol which is not a | |
7077 | // section symbol, given the relocation type. | |
7078 | inline Relocatable_relocs::Reloc_strategy | |
7079 | local_non_section_strategy(unsigned int r_type, Relobj*, unsigned int r_sym) | |
7080 | { | |
7081 | if (r_type == 0 && r_sym == 0) | |
7082 | return Relocatable_relocs::RELOC_DISCARD; | |
7083 | return Relocatable_relocs::RELOC_COPY; | |
7084 | } | |
7085 | ||
7086 | // Return the strategy to use for a local symbol which is a section | |
7087 | // symbol, given the relocation type. | |
7088 | inline Relocatable_relocs::Reloc_strategy | |
7089 | local_section_strategy(unsigned int, Relobj*) | |
7090 | { | |
7091 | return Relocatable_relocs::RELOC_ADJUST_FOR_SECTION_RELA; | |
7092 | } | |
7093 | ||
7094 | // Return the strategy to use for a global symbol, given the | |
7095 | // relocation type, the object, and the symbol index. | |
7096 | inline Relocatable_relocs::Reloc_strategy | |
7097 | global_strategy(unsigned int r_type, Relobj*, unsigned int) | |
7098 | { | |
7099 | if (r_type == elfcpp::R_PPC_PLTREL24) | |
7100 | return Relocatable_relocs::RELOC_SPECIAL; | |
7101 | return Relocatable_relocs::RELOC_COPY; | |
7102 | } | |
7103 | }; | |
42cacb20 DE |
7104 | |
7105 | // Scan the relocs during a relocatable link. | |
7106 | ||
7107 | template<int size, bool big_endian> | |
7108 | void | |
7109 | Target_powerpc<size, big_endian>::scan_relocatable_relocs( | |
d83ce4e3 AM |
7110 | Symbol_table* symtab, |
7111 | Layout* layout, | |
7112 | Sized_relobj_file<size, big_endian>* object, | |
7113 | unsigned int data_shndx, | |
7114 | unsigned int sh_type, | |
7115 | const unsigned char* prelocs, | |
7116 | size_t reloc_count, | |
7117 | Output_section* output_section, | |
7118 | bool needs_special_offset_handling, | |
7119 | size_t local_symbol_count, | |
7120 | const unsigned char* plocal_symbols, | |
7121 | Relocatable_relocs* rr) | |
42cacb20 DE |
7122 | { |
7123 | gold_assert(sh_type == elfcpp::SHT_RELA); | |
7124 | ||
42cacb20 | 7125 | gold::scan_relocatable_relocs<size, big_endian, elfcpp::SHT_RELA, |
d83ce4e3 | 7126 | Powerpc_scan_relocatable_reloc>( |
42cacb20 DE |
7127 | symtab, |
7128 | layout, | |
7129 | object, | |
7130 | data_shndx, | |
7131 | prelocs, | |
7132 | reloc_count, | |
7133 | output_section, | |
7134 | needs_special_offset_handling, | |
7135 | local_symbol_count, | |
7136 | plocal_symbols, | |
7137 | rr); | |
7138 | } | |
7139 | ||
7404fe1b | 7140 | // Emit relocations for a section. |
dd93cd0a AM |
7141 | // This is a modified version of the function by the same name in |
7142 | // target-reloc.h. Using relocate_special_relocatable for | |
7143 | // R_PPC_PLTREL24 would require duplication of the entire body of the | |
7144 | // loop, so we may as well duplicate the whole thing. | |
42cacb20 DE |
7145 | |
7146 | template<int size, bool big_endian> | |
7147 | void | |
7404fe1b | 7148 | Target_powerpc<size, big_endian>::relocate_relocs( |
42cacb20 DE |
7149 | const Relocate_info<size, big_endian>* relinfo, |
7150 | unsigned int sh_type, | |
7151 | const unsigned char* prelocs, | |
7152 | size_t reloc_count, | |
7153 | Output_section* output_section, | |
62fe925a | 7154 | typename elfcpp::Elf_types<size>::Elf_Off offset_in_output_section, |
42cacb20 | 7155 | const Relocatable_relocs* rr, |
cf43a2fe | 7156 | unsigned char*, |
dd93cd0a | 7157 | Address view_address, |
cf43a2fe | 7158 | section_size_type, |
42cacb20 DE |
7159 | unsigned char* reloc_view, |
7160 | section_size_type reloc_view_size) | |
7161 | { | |
7162 | gold_assert(sh_type == elfcpp::SHT_RELA); | |
7163 | ||
cf43a2fe AM |
7164 | typedef typename Reloc_types<elfcpp::SHT_RELA, size, big_endian>::Reloc |
7165 | Reltype; | |
7166 | typedef typename Reloc_types<elfcpp::SHT_RELA, size, big_endian>::Reloc_write | |
7167 | Reltype_write; | |
7168 | const int reloc_size | |
7169 | = Reloc_types<elfcpp::SHT_RELA, size, big_endian>::reloc_size; | |
cf43a2fe AM |
7170 | |
7171 | Powerpc_relobj<size, big_endian>* const object | |
7172 | = static_cast<Powerpc_relobj<size, big_endian>*>(relinfo->object); | |
7173 | const unsigned int local_count = object->local_symbol_count(); | |
7174 | unsigned int got2_shndx = object->got2_shndx(); | |
c9269dff | 7175 | Address got2_addend = 0; |
cf43a2fe | 7176 | if (got2_shndx != 0) |
c9269dff AM |
7177 | { |
7178 | got2_addend = object->get_output_section_offset(got2_shndx); | |
7179 | gold_assert(got2_addend != invalid_address); | |
7180 | } | |
cf43a2fe AM |
7181 | |
7182 | unsigned char* pwrite = reloc_view; | |
7404fe1b | 7183 | bool zap_next = false; |
cf43a2fe AM |
7184 | for (size_t i = 0; i < reloc_count; ++i, prelocs += reloc_size) |
7185 | { | |
7186 | Relocatable_relocs::Reloc_strategy strategy = rr->strategy(i); | |
7187 | if (strategy == Relocatable_relocs::RELOC_DISCARD) | |
7188 | continue; | |
7189 | ||
7190 | Reltype reloc(prelocs); | |
7191 | Reltype_write reloc_write(pwrite); | |
7192 | ||
7404fe1b | 7193 | Address offset = reloc.get_r_offset(); |
cf43a2fe | 7194 | typename elfcpp::Elf_types<size>::Elf_WXword r_info = reloc.get_r_info(); |
7404fe1b AM |
7195 | unsigned int r_sym = elfcpp::elf_r_sym<size>(r_info); |
7196 | unsigned int r_type = elfcpp::elf_r_type<size>(r_info); | |
7197 | const unsigned int orig_r_sym = r_sym; | |
7198 | typename elfcpp::Elf_types<size>::Elf_Swxword addend | |
7199 | = reloc.get_r_addend(); | |
7200 | const Symbol* gsym = NULL; | |
7201 | ||
7202 | if (zap_next) | |
7203 | { | |
7204 | // We could arrange to discard these and other relocs for | |
7205 | // tls optimised sequences in the strategy methods, but for | |
7206 | // now do as BFD ld does. | |
7207 | r_type = elfcpp::R_POWERPC_NONE; | |
7208 | zap_next = false; | |
7209 | } | |
cf43a2fe AM |
7210 | |
7211 | // Get the new symbol index. | |
cf43a2fe AM |
7212 | if (r_sym < local_count) |
7213 | { | |
7214 | switch (strategy) | |
7215 | { | |
7216 | case Relocatable_relocs::RELOC_COPY: | |
7217 | case Relocatable_relocs::RELOC_SPECIAL: | |
7404fe1b | 7218 | if (r_sym != 0) |
dd93cd0a | 7219 | { |
7404fe1b AM |
7220 | r_sym = object->symtab_index(r_sym); |
7221 | gold_assert(r_sym != -1U); | |
dd93cd0a | 7222 | } |
cf43a2fe AM |
7223 | break; |
7224 | ||
7225 | case Relocatable_relocs::RELOC_ADJUST_FOR_SECTION_RELA: | |
7226 | { | |
7227 | // We are adjusting a section symbol. We need to find | |
7228 | // the symbol table index of the section symbol for | |
7229 | // the output section corresponding to input section | |
7230 | // in which this symbol is defined. | |
7231 | gold_assert(r_sym < local_count); | |
7232 | bool is_ordinary; | |
7233 | unsigned int shndx = | |
7234 | object->local_symbol_input_shndx(r_sym, &is_ordinary); | |
7235 | gold_assert(is_ordinary); | |
7236 | Output_section* os = object->output_section(shndx); | |
7237 | gold_assert(os != NULL); | |
7238 | gold_assert(os->needs_symtab_index()); | |
7404fe1b | 7239 | r_sym = os->symtab_index(); |
cf43a2fe AM |
7240 | } |
7241 | break; | |
7242 | ||
7243 | default: | |
7244 | gold_unreachable(); | |
7245 | } | |
7246 | } | |
7247 | else | |
7248 | { | |
7404fe1b | 7249 | gsym = object->global_symbol(r_sym); |
cf43a2fe AM |
7250 | gold_assert(gsym != NULL); |
7251 | if (gsym->is_forwarder()) | |
7252 | gsym = relinfo->symtab->resolve_forwards(gsym); | |
7253 | ||
7254 | gold_assert(gsym->has_symtab_index()); | |
7404fe1b | 7255 | r_sym = gsym->symtab_index(); |
cf43a2fe AM |
7256 | } |
7257 | ||
7258 | // Get the new offset--the location in the output section where | |
7259 | // this relocation should be applied. | |
cf43a2fe | 7260 | if (static_cast<Address>(offset_in_output_section) != invalid_address) |
7404fe1b | 7261 | offset += offset_in_output_section; |
cf43a2fe AM |
7262 | else |
7263 | { | |
c9269dff AM |
7264 | section_offset_type sot_offset = |
7265 | convert_types<section_offset_type, Address>(offset); | |
cf43a2fe | 7266 | section_offset_type new_sot_offset = |
c9269dff AM |
7267 | output_section->output_offset(object, relinfo->data_shndx, |
7268 | sot_offset); | |
cf43a2fe | 7269 | gold_assert(new_sot_offset != -1); |
7404fe1b | 7270 | offset = new_sot_offset; |
cf43a2fe AM |
7271 | } |
7272 | ||
dd93cd0a AM |
7273 | // In an object file, r_offset is an offset within the section. |
7274 | // In an executable or dynamic object, generated by | |
7275 | // --emit-relocs, r_offset is an absolute address. | |
7404fe1b | 7276 | if (!parameters->options().relocatable()) |
dd93cd0a | 7277 | { |
7404fe1b | 7278 | offset += view_address; |
dd93cd0a | 7279 | if (static_cast<Address>(offset_in_output_section) != invalid_address) |
7404fe1b | 7280 | offset -= offset_in_output_section; |
dd93cd0a AM |
7281 | } |
7282 | ||
cf43a2fe | 7283 | // Handle the reloc addend based on the strategy. |
cf43a2fe AM |
7284 | if (strategy == Relocatable_relocs::RELOC_COPY) |
7285 | ; | |
7286 | else if (strategy == Relocatable_relocs::RELOC_ADJUST_FOR_SECTION_RELA) | |
7287 | { | |
7404fe1b | 7288 | const Symbol_value<size>* psymval = object->local_symbol(orig_r_sym); |
cf43a2fe AM |
7289 | addend = psymval->value(object, addend); |
7290 | } | |
7291 | else if (strategy == Relocatable_relocs::RELOC_SPECIAL) | |
7292 | { | |
7293 | if (addend >= 32768) | |
7294 | addend += got2_addend; | |
7295 | } | |
7296 | else | |
7297 | gold_unreachable(); | |
7298 | ||
7404fe1b AM |
7299 | if (!parameters->options().relocatable()) |
7300 | { | |
7301 | if (r_type == elfcpp::R_POWERPC_GOT_TLSGD16 | |
7302 | || r_type == elfcpp::R_POWERPC_GOT_TLSGD16_LO | |
7303 | || r_type == elfcpp::R_POWERPC_GOT_TLSGD16_HI | |
7304 | || r_type == elfcpp::R_POWERPC_GOT_TLSGD16_HA) | |
7305 | { | |
7306 | // First instruction of a global dynamic sequence, | |
7307 | // arg setup insn. | |
7308 | const bool final = gsym == NULL || gsym->final_value_is_known(); | |
7309 | switch (this->optimize_tls_gd(final)) | |
7310 | { | |
7311 | case tls::TLSOPT_TO_IE: | |
7312 | r_type += (elfcpp::R_POWERPC_GOT_TPREL16 | |
7313 | - elfcpp::R_POWERPC_GOT_TLSGD16); | |
7314 | break; | |
7315 | case tls::TLSOPT_TO_LE: | |
7316 | if (r_type == elfcpp::R_POWERPC_GOT_TLSGD16 | |
7317 | || r_type == elfcpp::R_POWERPC_GOT_TLSGD16_LO) | |
7318 | r_type = elfcpp::R_POWERPC_TPREL16_HA; | |
7319 | else | |
7320 | { | |
7321 | r_type = elfcpp::R_POWERPC_NONE; | |
7322 | offset -= 2 * big_endian; | |
7323 | } | |
7324 | break; | |
7325 | default: | |
7326 | break; | |
7327 | } | |
7328 | } | |
7329 | else if (r_type == elfcpp::R_POWERPC_GOT_TLSLD16 | |
7330 | || r_type == elfcpp::R_POWERPC_GOT_TLSLD16_LO | |
7331 | || r_type == elfcpp::R_POWERPC_GOT_TLSLD16_HI | |
7332 | || r_type == elfcpp::R_POWERPC_GOT_TLSLD16_HA) | |
7333 | { | |
7334 | // First instruction of a local dynamic sequence, | |
7335 | // arg setup insn. | |
7336 | if (this->optimize_tls_ld() == tls::TLSOPT_TO_LE) | |
7337 | { | |
7338 | if (r_type == elfcpp::R_POWERPC_GOT_TLSLD16 | |
7339 | || r_type == elfcpp::R_POWERPC_GOT_TLSLD16_LO) | |
7340 | { | |
7341 | r_type = elfcpp::R_POWERPC_TPREL16_HA; | |
7342 | const Output_section* os = relinfo->layout->tls_segment() | |
7343 | ->first_section(); | |
7344 | gold_assert(os != NULL); | |
7345 | gold_assert(os->needs_symtab_index()); | |
7346 | r_sym = os->symtab_index(); | |
7347 | addend = dtp_offset; | |
7348 | } | |
7349 | else | |
7350 | { | |
7351 | r_type = elfcpp::R_POWERPC_NONE; | |
7352 | offset -= 2 * big_endian; | |
7353 | } | |
7354 | } | |
7355 | } | |
7356 | else if (r_type == elfcpp::R_POWERPC_GOT_TPREL16 | |
7357 | || r_type == elfcpp::R_POWERPC_GOT_TPREL16_LO | |
7358 | || r_type == elfcpp::R_POWERPC_GOT_TPREL16_HI | |
7359 | || r_type == elfcpp::R_POWERPC_GOT_TPREL16_HA) | |
7360 | { | |
7361 | // First instruction of initial exec sequence. | |
7362 | const bool final = gsym == NULL || gsym->final_value_is_known(); | |
7363 | if (this->optimize_tls_ie(final) == tls::TLSOPT_TO_LE) | |
7364 | { | |
7365 | if (r_type == elfcpp::R_POWERPC_GOT_TPREL16 | |
7366 | || r_type == elfcpp::R_POWERPC_GOT_TPREL16_LO) | |
7367 | r_type = elfcpp::R_POWERPC_TPREL16_HA; | |
7368 | else | |
7369 | { | |
7370 | r_type = elfcpp::R_POWERPC_NONE; | |
7371 | offset -= 2 * big_endian; | |
7372 | } | |
7373 | } | |
7374 | } | |
7375 | else if ((size == 64 && r_type == elfcpp::R_PPC64_TLSGD) | |
7376 | || (size == 32 && r_type == elfcpp::R_PPC_TLSGD)) | |
7377 | { | |
7378 | // Second instruction of a global dynamic sequence, | |
7379 | // the __tls_get_addr call | |
7380 | const bool final = gsym == NULL || gsym->final_value_is_known(); | |
7381 | switch (this->optimize_tls_gd(final)) | |
7382 | { | |
7383 | case tls::TLSOPT_TO_IE: | |
7384 | r_type = elfcpp::R_POWERPC_NONE; | |
7385 | zap_next = true; | |
7386 | break; | |
7387 | case tls::TLSOPT_TO_LE: | |
7388 | r_type = elfcpp::R_POWERPC_TPREL16_LO; | |
7389 | offset += 2 * big_endian; | |
7390 | zap_next = true; | |
7391 | break; | |
7392 | default: | |
7393 | break; | |
7394 | } | |
7395 | } | |
7396 | else if ((size == 64 && r_type == elfcpp::R_PPC64_TLSLD) | |
7397 | || (size == 32 && r_type == elfcpp::R_PPC_TLSLD)) | |
7398 | { | |
7399 | // Second instruction of a local dynamic sequence, | |
7400 | // the __tls_get_addr call | |
7401 | if (this->optimize_tls_ld() == tls::TLSOPT_TO_LE) | |
7402 | { | |
7403 | const Output_section* os = relinfo->layout->tls_segment() | |
7404 | ->first_section(); | |
7405 | gold_assert(os != NULL); | |
7406 | gold_assert(os->needs_symtab_index()); | |
7407 | r_sym = os->symtab_index(); | |
7408 | addend = dtp_offset; | |
7409 | r_type = elfcpp::R_POWERPC_TPREL16_LO; | |
7410 | offset += 2 * big_endian; | |
7411 | zap_next = true; | |
7412 | } | |
7413 | } | |
7414 | else if (r_type == elfcpp::R_POWERPC_TLS) | |
7415 | { | |
7416 | // Second instruction of an initial exec sequence | |
7417 | const bool final = gsym == NULL || gsym->final_value_is_known(); | |
7418 | if (this->optimize_tls_ie(final) == tls::TLSOPT_TO_LE) | |
7419 | { | |
7420 | r_type = elfcpp::R_POWERPC_TPREL16_LO; | |
7421 | offset += 2 * big_endian; | |
7422 | } | |
7423 | } | |
7424 | } | |
7425 | ||
7426 | reloc_write.put_r_offset(offset); | |
7427 | reloc_write.put_r_info(elfcpp::elf_r_info<size>(r_sym, r_type)); | |
7428 | reloc_write.put_r_addend(addend); | |
cf43a2fe AM |
7429 | |
7430 | pwrite += reloc_size; | |
7431 | } | |
7432 | ||
7433 | gold_assert(static_cast<section_size_type>(pwrite - reloc_view) | |
7434 | == reloc_view_size); | |
42cacb20 DE |
7435 | } |
7436 | ||
ec661b9d | 7437 | // Return the value to use for a dynamic symbol which requires special |
42cacb20 DE |
7438 | // treatment. This is how we support equality comparisons of function |
7439 | // pointers across shared library boundaries, as described in the | |
7440 | // processor specific ABI supplement. | |
7441 | ||
7442 | template<int size, bool big_endian> | |
7443 | uint64_t | |
7444 | Target_powerpc<size, big_endian>::do_dynsym_value(const Symbol* gsym) const | |
7445 | { | |
cf43a2fe AM |
7446 | if (size == 32) |
7447 | { | |
7448 | gold_assert(gsym->is_from_dynobj() && gsym->has_plt_offset()); | |
ec661b9d AM |
7449 | for (typename Stub_tables::const_iterator p = this->stub_tables_.begin(); |
7450 | p != this->stub_tables_.end(); | |
7451 | ++p) | |
7452 | { | |
7453 | Address off = (*p)->find_plt_call_entry(gsym); | |
7454 | if (off != invalid_address) | |
7455 | return (*p)->stub_address() + off; | |
7456 | } | |
c9824451 | 7457 | } |
ec661b9d | 7458 | gold_unreachable(); |
c9824451 AM |
7459 | } |
7460 | ||
7461 | // Return the PLT address to use for a local symbol. | |
7462 | template<int size, bool big_endian> | |
7463 | uint64_t | |
7464 | Target_powerpc<size, big_endian>::do_plt_address_for_local( | |
7465 | const Relobj* object, | |
7466 | unsigned int symndx) const | |
7467 | { | |
7468 | if (size == 32) | |
7469 | { | |
7470 | const Sized_relobj<size, big_endian>* relobj | |
7471 | = static_cast<const Sized_relobj<size, big_endian>*>(object); | |
ec661b9d AM |
7472 | for (typename Stub_tables::const_iterator p = this->stub_tables_.begin(); |
7473 | p != this->stub_tables_.end(); | |
7474 | ++p) | |
7475 | { | |
7476 | Address off = (*p)->find_plt_call_entry(relobj->sized_relobj(), | |
7477 | symndx); | |
7478 | if (off != invalid_address) | |
7479 | return (*p)->stub_address() + off; | |
7480 | } | |
c9824451 | 7481 | } |
ec661b9d | 7482 | gold_unreachable(); |
c9824451 AM |
7483 | } |
7484 | ||
7485 | // Return the PLT address to use for a global symbol. | |
7486 | template<int size, bool big_endian> | |
7487 | uint64_t | |
7488 | Target_powerpc<size, big_endian>::do_plt_address_for_global( | |
7489 | const Symbol* gsym) const | |
7490 | { | |
7491 | if (size == 32) | |
7492 | { | |
ec661b9d AM |
7493 | for (typename Stub_tables::const_iterator p = this->stub_tables_.begin(); |
7494 | p != this->stub_tables_.end(); | |
7495 | ++p) | |
7496 | { | |
7497 | Address off = (*p)->find_plt_call_entry(gsym); | |
7498 | if (off != invalid_address) | |
7499 | return (*p)->stub_address() + off; | |
7500 | } | |
cf43a2fe | 7501 | } |
ec661b9d | 7502 | gold_unreachable(); |
42cacb20 DE |
7503 | } |
7504 | ||
bd73a62d AM |
7505 | // Return the offset to use for the GOT_INDX'th got entry which is |
7506 | // for a local tls symbol specified by OBJECT, SYMNDX. | |
7507 | template<int size, bool big_endian> | |
7508 | int64_t | |
7509 | Target_powerpc<size, big_endian>::do_tls_offset_for_local( | |
7510 | const Relobj* object, | |
7511 | unsigned int symndx, | |
7512 | unsigned int got_indx) const | |
7513 | { | |
7514 | const Powerpc_relobj<size, big_endian>* ppc_object | |
7515 | = static_cast<const Powerpc_relobj<size, big_endian>*>(object); | |
7516 | if (ppc_object->local_symbol(symndx)->is_tls_symbol()) | |
7517 | { | |
7518 | for (Got_type got_type = GOT_TYPE_TLSGD; | |
7519 | got_type <= GOT_TYPE_TPREL; | |
7520 | got_type = Got_type(got_type + 1)) | |
7521 | if (ppc_object->local_has_got_offset(symndx, got_type)) | |
7522 | { | |
7523 | unsigned int off = ppc_object->local_got_offset(symndx, got_type); | |
7524 | if (got_type == GOT_TYPE_TLSGD) | |
7525 | off += size / 8; | |
7526 | if (off == got_indx * (size / 8)) | |
7527 | { | |
7528 | if (got_type == GOT_TYPE_TPREL) | |
7529 | return -tp_offset; | |
7530 | else | |
7531 | return -dtp_offset; | |
7532 | } | |
7533 | } | |
7534 | } | |
7535 | gold_unreachable(); | |
7536 | } | |
7537 | ||
7538 | // Return the offset to use for the GOT_INDX'th got entry which is | |
7539 | // for global tls symbol GSYM. | |
7540 | template<int size, bool big_endian> | |
7541 | int64_t | |
7542 | Target_powerpc<size, big_endian>::do_tls_offset_for_global( | |
7543 | Symbol* gsym, | |
7544 | unsigned int got_indx) const | |
7545 | { | |
7546 | if (gsym->type() == elfcpp::STT_TLS) | |
7547 | { | |
7548 | for (Got_type got_type = GOT_TYPE_TLSGD; | |
7549 | got_type <= GOT_TYPE_TPREL; | |
7550 | got_type = Got_type(got_type + 1)) | |
7551 | if (gsym->has_got_offset(got_type)) | |
7552 | { | |
7553 | unsigned int off = gsym->got_offset(got_type); | |
7554 | if (got_type == GOT_TYPE_TLSGD) | |
7555 | off += size / 8; | |
7556 | if (off == got_indx * (size / 8)) | |
7557 | { | |
7558 | if (got_type == GOT_TYPE_TPREL) | |
7559 | return -tp_offset; | |
7560 | else | |
7561 | return -dtp_offset; | |
7562 | } | |
7563 | } | |
7564 | } | |
7565 | gold_unreachable(); | |
7566 | } | |
7567 | ||
42cacb20 DE |
7568 | // The selector for powerpc object files. |
7569 | ||
7570 | template<int size, bool big_endian> | |
7571 | class Target_selector_powerpc : public Target_selector | |
7572 | { | |
7573 | public: | |
7574 | Target_selector_powerpc() | |
edc27beb AM |
7575 | : Target_selector(size == 64 ? elfcpp::EM_PPC64 : elfcpp::EM_PPC, |
7576 | size, big_endian, | |
03ef7571 ILT |
7577 | (size == 64 |
7578 | ? (big_endian ? "elf64-powerpc" : "elf64-powerpcle") | |
7579 | : (big_endian ? "elf32-powerpc" : "elf32-powerpcle")), | |
7580 | (size == 64 | |
7581 | ? (big_endian ? "elf64ppc" : "elf64lppc") | |
7582 | : (big_endian ? "elf32ppc" : "elf32lppc"))) | |
42cacb20 DE |
7583 | { } |
7584 | ||
2e702c99 RM |
7585 | virtual Target* |
7586 | do_instantiate_target() | |
7f055c20 | 7587 | { return new Target_powerpc<size, big_endian>(); } |
42cacb20 DE |
7588 | }; |
7589 | ||
7590 | Target_selector_powerpc<32, true> target_selector_ppc32; | |
7591 | Target_selector_powerpc<32, false> target_selector_ppc32le; | |
7592 | Target_selector_powerpc<64, true> target_selector_ppc64; | |
7593 | Target_selector_powerpc<64, false> target_selector_ppc64le; | |
7594 | ||
decdd3bc AM |
7595 | // Instantiate these constants for -O0 |
7596 | template<int size, bool big_endian> | |
7597 | const int Output_data_glink<size, big_endian>::pltresolve_size; | |
7598 | template<int size, bool big_endian> | |
7599 | const typename Stub_table<size, big_endian>::Address | |
7600 | Stub_table<size, big_endian>::invalid_address; | |
7601 | template<int size, bool big_endian> | |
7602 | const typename Target_powerpc<size, big_endian>::Address | |
7603 | Target_powerpc<size, big_endian>::invalid_address; | |
7604 | ||
42cacb20 | 7605 | } // End anonymous namespace. |