Commit | Line | Data |
---|---|---|
42cacb20 DE |
1 | // powerpc.cc -- powerpc target support for gold. |
2 | ||
4b95cf5c | 3 | // Copyright (C) 2008-2014 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), |
b4f7960d AM |
80 | opd_ent_(), access_from_map_(), has14_(), stub_table_(), |
81 | e_flags_(ehdr.get_e_flags()), st_other_() | |
82 | { | |
83 | this->set_abiversion(0); | |
84 | } | |
cf43a2fe AM |
85 | |
86 | ~Powerpc_relobj() | |
87 | { } | |
88 | ||
b4f7960d AM |
89 | // Read the symbols then set up st_other vector. |
90 | void | |
91 | do_read_symbols(Read_symbols_data*); | |
92 | ||
c9269dff | 93 | // The .got2 section shndx. |
cf43a2fe AM |
94 | unsigned int |
95 | got2_shndx() const | |
96 | { | |
97 | if (size == 32) | |
c9269dff | 98 | return this->special_; |
cf43a2fe AM |
99 | else |
100 | return 0; | |
101 | } | |
102 | ||
c9269dff AM |
103 | // The .opd section shndx. |
104 | unsigned int | |
105 | opd_shndx() const | |
106 | { | |
107 | if (size == 32) | |
108 | return 0; | |
109 | else | |
110 | return this->special_; | |
111 | } | |
112 | ||
113 | // Init OPD entry arrays. | |
114 | void | |
115 | init_opd(size_t opd_size) | |
116 | { | |
117 | size_t count = this->opd_ent_ndx(opd_size); | |
bfdfa4cd | 118 | this->opd_ent_.resize(count); |
c9269dff AM |
119 | } |
120 | ||
121 | // Return section and offset of function entry for .opd + R_OFF. | |
e81fea4d AM |
122 | unsigned int |
123 | get_opd_ent(Address r_off, Address* value = NULL) const | |
c9269dff AM |
124 | { |
125 | size_t ndx = this->opd_ent_ndx(r_off); | |
bfdfa4cd AM |
126 | gold_assert(ndx < this->opd_ent_.size()); |
127 | gold_assert(this->opd_ent_[ndx].shndx != 0); | |
e81fea4d | 128 | if (value != NULL) |
bfdfa4cd AM |
129 | *value = this->opd_ent_[ndx].off; |
130 | return this->opd_ent_[ndx].shndx; | |
c9269dff AM |
131 | } |
132 | ||
133 | // Set section and offset of function entry for .opd + R_OFF. | |
134 | void | |
dd93cd0a | 135 | set_opd_ent(Address r_off, unsigned int shndx, Address value) |
c9269dff AM |
136 | { |
137 | size_t ndx = this->opd_ent_ndx(r_off); | |
bfdfa4cd AM |
138 | gold_assert(ndx < this->opd_ent_.size()); |
139 | this->opd_ent_[ndx].shndx = shndx; | |
140 | this->opd_ent_[ndx].off = value; | |
141 | } | |
142 | ||
143 | // Return discard flag for .opd + R_OFF. | |
144 | bool | |
145 | get_opd_discard(Address r_off) const | |
146 | { | |
147 | size_t ndx = this->opd_ent_ndx(r_off); | |
148 | gold_assert(ndx < this->opd_ent_.size()); | |
149 | return this->opd_ent_[ndx].discard; | |
150 | } | |
151 | ||
152 | // Set discard flag for .opd + R_OFF. | |
153 | void | |
154 | set_opd_discard(Address r_off) | |
155 | { | |
156 | size_t ndx = this->opd_ent_ndx(r_off); | |
157 | gold_assert(ndx < this->opd_ent_.size()); | |
158 | this->opd_ent_[ndx].discard = true; | |
c9269dff AM |
159 | } |
160 | ||
e81fea4d AM |
161 | bool |
162 | opd_valid() const | |
163 | { return this->opd_valid_; } | |
164 | ||
165 | void | |
166 | set_opd_valid() | |
167 | { this->opd_valid_ = true; } | |
168 | ||
c9269dff AM |
169 | // Examine .rela.opd to build info about function entry points. |
170 | void | |
171 | scan_opd_relocs(size_t reloc_count, | |
172 | const unsigned char* prelocs, | |
173 | const unsigned char* plocal_syms); | |
174 | ||
26a4e9cb AM |
175 | // Perform the Sized_relobj_file method, then set up opd info from |
176 | // .opd relocs. | |
c9269dff AM |
177 | void |
178 | do_read_relocs(Read_relocs_data*); | |
179 | ||
cf43a2fe AM |
180 | bool |
181 | do_find_special_sections(Read_symbols_data* sd); | |
182 | ||
ec4dbad3 AM |
183 | // Adjust this local symbol value. Return false if the symbol |
184 | // should be discarded from the output file. | |
185 | bool | |
186 | do_adjust_local_symbol(Symbol_value<size>* lv) const | |
187 | { | |
188 | if (size == 64 && this->opd_shndx() != 0) | |
189 | { | |
190 | bool is_ordinary; | |
191 | if (lv->input_shndx(&is_ordinary) != this->opd_shndx()) | |
192 | return true; | |
193 | if (this->get_opd_discard(lv->input_value())) | |
194 | return false; | |
195 | } | |
196 | return true; | |
197 | } | |
198 | ||
6c77229c AM |
199 | Access_from* |
200 | access_from_map() | |
201 | { return &this->access_from_map_; } | |
202 | ||
203 | // Add a reference from SRC_OBJ, SRC_INDX to this object's .opd | |
204 | // section at DST_OFF. | |
205 | void | |
206 | add_reference(Object* src_obj, | |
207 | unsigned int src_indx, | |
208 | typename elfcpp::Elf_types<size>::Elf_Addr dst_off) | |
209 | { | |
210 | Section_id src_id(src_obj, src_indx); | |
211 | this->access_from_map_[dst_off].insert(src_id); | |
212 | } | |
213 | ||
214 | // Add a reference to the code section specified by the .opd entry | |
215 | // at DST_OFF | |
216 | void | |
217 | add_gc_mark(typename elfcpp::Elf_types<size>::Elf_Addr dst_off) | |
218 | { | |
219 | size_t ndx = this->opd_ent_ndx(dst_off); | |
220 | if (ndx >= this->opd_ent_.size()) | |
221 | this->opd_ent_.resize(ndx + 1); | |
222 | this->opd_ent_[ndx].gc_mark = true; | |
223 | } | |
224 | ||
225 | void | |
226 | process_gc_mark(Symbol_table* symtab) | |
227 | { | |
228 | for (size_t i = 0; i < this->opd_ent_.size(); i++) | |
229 | if (this->opd_ent_[i].gc_mark) | |
230 | { | |
231 | unsigned int shndx = this->opd_ent_[i].shndx; | |
232 | symtab->gc()->worklist().push(Section_id(this, shndx)); | |
233 | } | |
234 | } | |
235 | ||
dd93cd0a AM |
236 | // Return offset in output GOT section that this object will use |
237 | // as a TOC pointer. Won't be just a constant with multi-toc support. | |
238 | Address | |
239 | toc_base_offset() const | |
240 | { return 0x8000; } | |
241 | ||
d8f5a274 AM |
242 | void |
243 | set_has_small_toc_reloc() | |
244 | { has_small_toc_reloc_ = true; } | |
245 | ||
246 | bool | |
247 | has_small_toc_reloc() const | |
248 | { return has_small_toc_reloc_; } | |
249 | ||
ec661b9d AM |
250 | void |
251 | set_has_14bit_branch(unsigned int shndx) | |
252 | { | |
253 | if (shndx >= this->has14_.size()) | |
254 | this->has14_.resize(shndx + 1); | |
255 | this->has14_[shndx] = true; | |
256 | } | |
257 | ||
258 | bool | |
259 | has_14bit_branch(unsigned int shndx) const | |
260 | { return shndx < this->has14_.size() && this->has14_[shndx]; } | |
261 | ||
262 | void | |
263 | set_stub_table(unsigned int shndx, Stub_table<size, big_endian>* stub_table) | |
264 | { | |
265 | if (shndx >= this->stub_table_.size()) | |
266 | this->stub_table_.resize(shndx + 1); | |
267 | this->stub_table_[shndx] = stub_table; | |
268 | } | |
269 | ||
270 | Stub_table<size, big_endian>* | |
271 | stub_table(unsigned int shndx) | |
272 | { | |
273 | if (shndx < this->stub_table_.size()) | |
274 | return this->stub_table_[shndx]; | |
275 | return NULL; | |
276 | } | |
277 | ||
b4f7960d AM |
278 | int |
279 | abiversion() const | |
280 | { return this->e_flags_ & elfcpp::EF_PPC64_ABI; } | |
281 | ||
282 | // Set ABI version for input and output | |
283 | void | |
284 | set_abiversion(int ver); | |
285 | ||
286 | unsigned int | |
287 | ppc64_local_entry_offset(const Symbol* sym) const | |
288 | { return elfcpp::ppc64_decode_local_entry(sym->nonvis() >> 3); } | |
289 | ||
290 | unsigned int | |
291 | ppc64_local_entry_offset(unsigned int symndx) const | |
292 | { return elfcpp::ppc64_decode_local_entry(this->st_other_[symndx] >> 5); } | |
293 | ||
cf43a2fe | 294 | private: |
bfdfa4cd AM |
295 | struct Opd_ent |
296 | { | |
297 | unsigned int shndx; | |
c6de8ed4 AM |
298 | bool discard : 1; |
299 | bool gc_mark : 1; | |
26a4e9cb | 300 | Address off; |
bfdfa4cd AM |
301 | }; |
302 | ||
303 | // Return index into opd_ent_ array for .opd entry at OFF. | |
304 | // .opd entries are 24 bytes long, but they can be spaced 16 bytes | |
305 | // apart when the language doesn't use the last 8-byte word, the | |
306 | // environment pointer. Thus dividing the entry section offset by | |
307 | // 16 will give an index into opd_ent_ that works for either layout | |
308 | // of .opd. (It leaves some elements of the vector unused when .opd | |
309 | // entries are spaced 24 bytes apart, but we don't know the spacing | |
310 | // until relocations are processed, and in any case it is possible | |
311 | // for an object to have some entries spaced 16 bytes apart and | |
312 | // others 24 bytes apart.) | |
c9269dff AM |
313 | size_t |
314 | opd_ent_ndx(size_t off) const | |
315 | { return off >> 4;} | |
316 | ||
317 | // For 32-bit the .got2 section shdnx, for 64-bit the .opd section shndx. | |
318 | unsigned int special_; | |
bfdfa4cd | 319 | |
d8f5a274 AM |
320 | // For 64-bit, whether this object uses small model relocs to access |
321 | // the toc. | |
322 | bool has_small_toc_reloc_; | |
323 | ||
bfdfa4cd AM |
324 | // Set at the start of gc_process_relocs, when we know opd_ent_ |
325 | // vector is valid. The flag could be made atomic and set in | |
326 | // do_read_relocs with memory_order_release and then tested with | |
327 | // memory_order_acquire, potentially resulting in fewer entries in | |
328 | // access_from_map_. | |
329 | bool opd_valid_; | |
330 | ||
c9269dff AM |
331 | // The first 8-byte word of an OPD entry gives the address of the |
332 | // entry point of the function. Relocatable object files have a | |
bfdfa4cd | 333 | // relocation on this word. The following vector records the |
c9269dff | 334 | // section and offset specified by these relocations. |
bfdfa4cd AM |
335 | std::vector<Opd_ent> opd_ent_; |
336 | ||
e81fea4d | 337 | // References made to this object's .opd section when running |
bfdfa4cd AM |
338 | // gc_process_relocs for another object, before the opd_ent_ vector |
339 | // is valid for this object. | |
e81fea4d | 340 | Access_from access_from_map_; |
ec661b9d AM |
341 | |
342 | // Whether input section has a 14-bit branch reloc. | |
343 | std::vector<bool> has14_; | |
344 | ||
345 | // The stub table to use for a given input section. | |
346 | std::vector<Stub_table<size, big_endian>*> stub_table_; | |
b4f7960d AM |
347 | |
348 | // Header e_flags | |
349 | elfcpp::Elf_Word e_flags_; | |
350 | ||
351 | // ELF st_other field for local symbols. | |
352 | std::vector<unsigned char> st_other_; | |
cf43a2fe AM |
353 | }; |
354 | ||
dc3714f3 AM |
355 | template<int size, bool big_endian> |
356 | class Powerpc_dynobj : public Sized_dynobj<size, big_endian> | |
357 | { | |
358 | public: | |
359 | typedef typename elfcpp::Elf_types<size>::Elf_Addr Address; | |
360 | ||
361 | Powerpc_dynobj(const std::string& name, Input_file* input_file, off_t offset, | |
362 | const typename elfcpp::Ehdr<size, big_endian>& ehdr) | |
363 | : Sized_dynobj<size, big_endian>(name, input_file, offset, ehdr), | |
b4f7960d AM |
364 | opd_shndx_(0), opd_ent_(), e_flags_(ehdr.get_e_flags()) |
365 | { | |
366 | this->set_abiversion(0); | |
367 | } | |
dc3714f3 AM |
368 | |
369 | ~Powerpc_dynobj() | |
370 | { } | |
371 | ||
372 | // Call Sized_dynobj::do_read_symbols to read the symbols then | |
373 | // read .opd from a dynamic object, filling in opd_ent_ vector, | |
374 | void | |
375 | do_read_symbols(Read_symbols_data*); | |
376 | ||
377 | // The .opd section shndx. | |
378 | unsigned int | |
379 | opd_shndx() const | |
380 | { | |
381 | return this->opd_shndx_; | |
382 | } | |
383 | ||
384 | // The .opd section address. | |
385 | Address | |
386 | opd_address() const | |
387 | { | |
388 | return this->opd_address_; | |
389 | } | |
390 | ||
391 | // Init OPD entry arrays. | |
392 | void | |
393 | init_opd(size_t opd_size) | |
394 | { | |
395 | size_t count = this->opd_ent_ndx(opd_size); | |
396 | this->opd_ent_.resize(count); | |
397 | } | |
398 | ||
399 | // Return section and offset of function entry for .opd + R_OFF. | |
400 | unsigned int | |
401 | get_opd_ent(Address r_off, Address* value = NULL) const | |
402 | { | |
403 | size_t ndx = this->opd_ent_ndx(r_off); | |
404 | gold_assert(ndx < this->opd_ent_.size()); | |
405 | gold_assert(this->opd_ent_[ndx].shndx != 0); | |
406 | if (value != NULL) | |
407 | *value = this->opd_ent_[ndx].off; | |
408 | return this->opd_ent_[ndx].shndx; | |
409 | } | |
410 | ||
411 | // Set section and offset of function entry for .opd + R_OFF. | |
412 | void | |
413 | set_opd_ent(Address r_off, unsigned int shndx, Address value) | |
414 | { | |
415 | size_t ndx = this->opd_ent_ndx(r_off); | |
416 | gold_assert(ndx < this->opd_ent_.size()); | |
417 | this->opd_ent_[ndx].shndx = shndx; | |
418 | this->opd_ent_[ndx].off = value; | |
419 | } | |
420 | ||
b4f7960d AM |
421 | int |
422 | abiversion() const | |
423 | { return this->e_flags_ & elfcpp::EF_PPC64_ABI; } | |
424 | ||
425 | // Set ABI version for input and output. | |
426 | void | |
427 | set_abiversion(int ver); | |
428 | ||
dc3714f3 AM |
429 | private: |
430 | // Used to specify extent of executable sections. | |
431 | struct Sec_info | |
432 | { | |
433 | Sec_info(Address start_, Address len_, unsigned int shndx_) | |
434 | : start(start_), len(len_), shndx(shndx_) | |
435 | { } | |
436 | ||
437 | bool | |
438 | operator<(const Sec_info& that) const | |
439 | { return this->start < that.start; } | |
440 | ||
441 | Address start; | |
442 | Address len; | |
443 | unsigned int shndx; | |
444 | }; | |
445 | ||
446 | struct Opd_ent | |
447 | { | |
448 | unsigned int shndx; | |
449 | Address off; | |
450 | }; | |
451 | ||
452 | // Return index into opd_ent_ array for .opd entry at OFF. | |
453 | size_t | |
454 | opd_ent_ndx(size_t off) const | |
455 | { return off >> 4;} | |
456 | ||
457 | // For 64-bit the .opd section shndx and address. | |
458 | unsigned int opd_shndx_; | |
459 | Address opd_address_; | |
460 | ||
461 | // The first 8-byte word of an OPD entry gives the address of the | |
462 | // entry point of the function. Records the section and offset | |
463 | // corresponding to the address. Note that in dynamic objects, | |
464 | // offset is *not* relative to the section. | |
465 | std::vector<Opd_ent> opd_ent_; | |
b4f7960d AM |
466 | |
467 | // Header e_flags | |
468 | elfcpp::Elf_Word e_flags_; | |
dc3714f3 AM |
469 | }; |
470 | ||
42cacb20 DE |
471 | template<int size, bool big_endian> |
472 | class Target_powerpc : public Sized_target<size, big_endian> | |
473 | { | |
474 | public: | |
d83ce4e3 AM |
475 | typedef |
476 | Output_data_reloc<elfcpp::SHT_RELA, true, size, big_endian> Reloc_section; | |
c9269dff | 477 | typedef typename elfcpp::Elf_types<size>::Elf_Addr Address; |
dd93cd0a | 478 | typedef typename elfcpp::Elf_types<size>::Elf_Swxword Signed_address; |
c9269dff | 479 | static const Address invalid_address = static_cast<Address>(0) - 1; |
dd93cd0a AM |
480 | // Offset of tp and dtp pointers from start of TLS block. |
481 | static const Address tp_offset = 0x7000; | |
482 | static const Address dtp_offset = 0x8000; | |
42cacb20 DE |
483 | |
484 | Target_powerpc() | |
485 | : Sized_target<size, big_endian>(&powerpc_info), | |
ec661b9d AM |
486 | got_(NULL), plt_(NULL), iplt_(NULL), brlt_section_(NULL), |
487 | glink_(NULL), rela_dyn_(NULL), copy_relocs_(elfcpp::R_POWERPC_COPY), | |
43819297 | 488 | tlsld_got_offset_(-1U), |
9e69ed50 AM |
489 | stub_tables_(), branch_lookup_table_(), branch_info_(), |
490 | plt_thread_safe_(false) | |
42cacb20 DE |
491 | { |
492 | } | |
493 | ||
2e702c99 | 494 | // Process the relocations to determine unreferenced sections for |
6d03d481 ST |
495 | // garbage collection. |
496 | void | |
ad0f2072 | 497 | gc_process_relocs(Symbol_table* symtab, |
2e702c99 RM |
498 | Layout* layout, |
499 | Sized_relobj_file<size, big_endian>* object, | |
500 | unsigned int data_shndx, | |
501 | unsigned int sh_type, | |
502 | const unsigned char* prelocs, | |
503 | size_t reloc_count, | |
504 | Output_section* output_section, | |
505 | bool needs_special_offset_handling, | |
506 | size_t local_symbol_count, | |
507 | const unsigned char* plocal_symbols); | |
6d03d481 | 508 | |
42cacb20 DE |
509 | // Scan the relocations to look for symbol adjustments. |
510 | void | |
ad0f2072 | 511 | scan_relocs(Symbol_table* symtab, |
42cacb20 | 512 | Layout* layout, |
6fa2a40b | 513 | Sized_relobj_file<size, big_endian>* object, |
42cacb20 DE |
514 | unsigned int data_shndx, |
515 | unsigned int sh_type, | |
516 | const unsigned char* prelocs, | |
517 | size_t reloc_count, | |
518 | Output_section* output_section, | |
519 | bool needs_special_offset_handling, | |
520 | size_t local_symbol_count, | |
521 | const unsigned char* plocal_symbols); | |
921b5322 AM |
522 | |
523 | // Map input .toc section to output .got section. | |
524 | const char* | |
525 | do_output_section_name(const Relobj*, const char* name, size_t* plen) const | |
526 | { | |
527 | if (size == 64 && strcmp(name, ".toc") == 0) | |
528 | { | |
529 | *plen = 4; | |
530 | return ".got"; | |
531 | } | |
532 | return NULL; | |
533 | } | |
534 | ||
f3a0ed29 AM |
535 | // Provide linker defined save/restore functions. |
536 | void | |
537 | define_save_restore_funcs(Layout*, Symbol_table*); | |
538 | ||
ec661b9d AM |
539 | // No stubs unless a final link. |
540 | bool | |
541 | do_may_relax() const | |
542 | { return !parameters->options().relocatable(); } | |
543 | ||
544 | bool | |
545 | do_relax(int, const Input_objects*, Symbol_table*, Layout*, const Task*); | |
546 | ||
9d5781f8 AM |
547 | void |
548 | do_plt_fde_location(const Output_data*, unsigned char*, | |
549 | uint64_t*, off_t*) const; | |
550 | ||
ec661b9d AM |
551 | // Stash info about branches, for stub generation. |
552 | void | |
553 | push_branch(Powerpc_relobj<size, big_endian>* ppc_object, | |
554 | unsigned int data_shndx, Address r_offset, | |
555 | unsigned int r_type, unsigned int r_sym, Address addend) | |
556 | { | |
557 | Branch_info info(ppc_object, data_shndx, r_offset, r_type, r_sym, addend); | |
558 | this->branch_info_.push_back(info); | |
559 | if (r_type == elfcpp::R_POWERPC_REL14 | |
560 | || r_type == elfcpp::R_POWERPC_REL14_BRTAKEN | |
561 | || r_type == elfcpp::R_POWERPC_REL14_BRNTAKEN) | |
562 | ppc_object->set_has_14bit_branch(data_shndx); | |
563 | } | |
564 | ||
565 | Stub_table<size, big_endian>* | |
566 | new_stub_table(); | |
567 | ||
f43ba157 AM |
568 | void |
569 | do_define_standard_symbols(Symbol_table*, Layout*); | |
570 | ||
42cacb20 DE |
571 | // Finalize the sections. |
572 | void | |
f59f41f3 | 573 | do_finalize_sections(Layout*, const Input_objects*, Symbol_table*); |
42cacb20 DE |
574 | |
575 | // Return the value to use for a dynamic which requires special | |
576 | // treatment. | |
577 | uint64_t | |
578 | do_dynsym_value(const Symbol*) const; | |
579 | ||
c9824451 AM |
580 | // Return the PLT address to use for a local symbol. |
581 | uint64_t | |
582 | do_plt_address_for_local(const Relobj*, unsigned int) const; | |
583 | ||
584 | // Return the PLT address to use for a global symbol. | |
585 | uint64_t | |
586 | do_plt_address_for_global(const Symbol*) const; | |
587 | ||
bd73a62d AM |
588 | // Return the offset to use for the GOT_INDX'th got entry which is |
589 | // for a local tls symbol specified by OBJECT, SYMNDX. | |
590 | int64_t | |
591 | do_tls_offset_for_local(const Relobj* object, | |
592 | unsigned int symndx, | |
593 | unsigned int got_indx) const; | |
594 | ||
595 | // Return the offset to use for the GOT_INDX'th got entry which is | |
596 | // for global tls symbol GSYM. | |
597 | int64_t | |
598 | do_tls_offset_for_global(Symbol* gsym, unsigned int got_indx) const; | |
599 | ||
dc3714f3 AM |
600 | void |
601 | do_function_location(Symbol_location*) const; | |
602 | ||
4d9aa155 AM |
603 | bool |
604 | do_can_check_for_function_pointers() const | |
605 | { return true; } | |
606 | ||
42cacb20 DE |
607 | // Relocate a section. |
608 | void | |
609 | relocate_section(const Relocate_info<size, big_endian>*, | |
610 | unsigned int sh_type, | |
611 | const unsigned char* prelocs, | |
612 | size_t reloc_count, | |
613 | Output_section* output_section, | |
614 | bool needs_special_offset_handling, | |
615 | unsigned char* view, | |
c9269dff | 616 | Address view_address, |
364c7fa5 ILT |
617 | section_size_type view_size, |
618 | const Reloc_symbol_changes*); | |
42cacb20 DE |
619 | |
620 | // Scan the relocs during a relocatable link. | |
621 | void | |
ad0f2072 | 622 | scan_relocatable_relocs(Symbol_table* symtab, |
42cacb20 | 623 | Layout* layout, |
6fa2a40b | 624 | Sized_relobj_file<size, big_endian>* object, |
42cacb20 DE |
625 | unsigned int data_shndx, |
626 | unsigned int sh_type, | |
627 | const unsigned char* prelocs, | |
628 | size_t reloc_count, | |
629 | Output_section* output_section, | |
630 | bool needs_special_offset_handling, | |
631 | size_t local_symbol_count, | |
632 | const unsigned char* plocal_symbols, | |
633 | Relocatable_relocs*); | |
634 | ||
7404fe1b | 635 | // Emit relocations for a section. |
42cacb20 | 636 | void |
7404fe1b AM |
637 | relocate_relocs(const Relocate_info<size, big_endian>*, |
638 | unsigned int sh_type, | |
639 | const unsigned char* prelocs, | |
640 | size_t reloc_count, | |
641 | Output_section* output_section, | |
62fe925a RM |
642 | typename elfcpp::Elf_types<size>::Elf_Off |
643 | offset_in_output_section, | |
7404fe1b AM |
644 | const Relocatable_relocs*, |
645 | unsigned char*, | |
646 | Address view_address, | |
647 | section_size_type, | |
648 | unsigned char* reloc_view, | |
649 | section_size_type reloc_view_size); | |
42cacb20 DE |
650 | |
651 | // Return whether SYM is defined by the ABI. | |
652 | bool | |
9c2d0ef9 | 653 | do_is_defined_by_abi(const Symbol* sym) const |
42cacb20 | 654 | { |
cf43a2fe | 655 | return strcmp(sym->name(), "__tls_get_addr") == 0; |
42cacb20 DE |
656 | } |
657 | ||
658 | // Return the size of the GOT section. | |
659 | section_size_type | |
0e70b911 | 660 | got_size() const |
42cacb20 DE |
661 | { |
662 | gold_assert(this->got_ != NULL); | |
663 | return this->got_->data_size(); | |
664 | } | |
665 | ||
cf43a2fe AM |
666 | // Get the PLT section. |
667 | const Output_data_plt_powerpc<size, big_endian>* | |
668 | plt_section() const | |
669 | { | |
670 | gold_assert(this->plt_ != NULL); | |
671 | return this->plt_; | |
672 | } | |
673 | ||
e5d5f5ed AM |
674 | // Get the IPLT section. |
675 | const Output_data_plt_powerpc<size, big_endian>* | |
676 | iplt_section() const | |
677 | { | |
678 | gold_assert(this->iplt_ != NULL); | |
679 | return this->iplt_; | |
680 | } | |
681 | ||
cf43a2fe AM |
682 | // Get the .glink section. |
683 | const Output_data_glink<size, big_endian>* | |
684 | glink_section() const | |
685 | { | |
686 | gold_assert(this->glink_ != NULL); | |
687 | return this->glink_; | |
688 | } | |
689 | ||
9055360d AM |
690 | Output_data_glink<size, big_endian>* |
691 | glink_section() | |
692 | { | |
693 | gold_assert(this->glink_ != NULL); | |
694 | return this->glink_; | |
695 | } | |
696 | ||
9d5781f8 AM |
697 | bool has_glink() const |
698 | { return this->glink_ != NULL; } | |
699 | ||
cf43a2fe AM |
700 | // Get the GOT section. |
701 | const Output_data_got_powerpc<size, big_endian>* | |
702 | got_section() const | |
703 | { | |
704 | gold_assert(this->got_ != NULL); | |
705 | return this->got_; | |
706 | } | |
707 | ||
26a4e9cb AM |
708 | // Get the GOT section, creating it if necessary. |
709 | Output_data_got_powerpc<size, big_endian>* | |
710 | got_section(Symbol_table*, Layout*); | |
711 | ||
cf43a2fe AM |
712 | Object* |
713 | do_make_elf_object(const std::string&, Input_file*, off_t, | |
714 | const elfcpp::Ehdr<size, big_endian>&); | |
715 | ||
0e70b911 CC |
716 | // Return the number of entries in the GOT. |
717 | unsigned int | |
718 | got_entry_count() const | |
719 | { | |
720 | if (this->got_ == NULL) | |
721 | return 0; | |
722 | return this->got_size() / (size / 8); | |
723 | } | |
724 | ||
725 | // Return the number of entries in the PLT. | |
726 | unsigned int | |
727 | plt_entry_count() const; | |
728 | ||
729 | // Return the offset of the first non-reserved PLT entry. | |
730 | unsigned int | |
b4f7960d AM |
731 | first_plt_entry_offset() const |
732 | { | |
733 | if (size == 32) | |
734 | return 0; | |
735 | if (this->abiversion() >= 2) | |
736 | return 16; | |
737 | return 24; | |
738 | } | |
0e70b911 CC |
739 | |
740 | // Return the size of each PLT entry. | |
741 | unsigned int | |
b4f7960d AM |
742 | plt_entry_size() const |
743 | { | |
744 | if (size == 32) | |
745 | return 4; | |
746 | if (this->abiversion() >= 2) | |
747 | return 8; | |
748 | return 24; | |
749 | } | |
0e70b911 | 750 | |
e81fea4d AM |
751 | // Add any special sections for this symbol to the gc work list. |
752 | // For powerpc64, this adds the code section of a function | |
753 | // descriptor. | |
754 | void | |
755 | do_gc_mark_symbol(Symbol_table* symtab, Symbol* sym) const; | |
756 | ||
757 | // Handle target specific gc actions when adding a gc reference from | |
758 | // SRC_OBJ, SRC_SHNDX to a location specified by DST_OBJ, DST_SHNDX | |
759 | // and DST_OFF. For powerpc64, this adds a referenc to the code | |
760 | // section of a function descriptor. | |
761 | void | |
762 | do_gc_add_reference(Symbol_table* symtab, | |
763 | Object* src_obj, | |
764 | unsigned int src_shndx, | |
765 | Object* dst_obj, | |
766 | unsigned int dst_shndx, | |
767 | Address dst_off) const; | |
768 | ||
ec661b9d AM |
769 | typedef std::vector<Stub_table<size, big_endian>*> Stub_tables; |
770 | const Stub_tables& | |
771 | stub_tables() const | |
772 | { return this->stub_tables_; } | |
773 | ||
774 | const Output_data_brlt_powerpc<size, big_endian>* | |
775 | brlt_section() const | |
776 | { return this->brlt_section_; } | |
777 | ||
778 | void | |
779 | add_branch_lookup_table(Address to) | |
780 | { | |
781 | unsigned int off = this->branch_lookup_table_.size() * (size / 8); | |
782 | this->branch_lookup_table_.insert(std::make_pair(to, off)); | |
783 | } | |
784 | ||
785 | Address | |
786 | find_branch_lookup_table(Address to) | |
787 | { | |
788 | typename Branch_lookup_table::const_iterator p | |
789 | = this->branch_lookup_table_.find(to); | |
790 | return p == this->branch_lookup_table_.end() ? invalid_address : p->second; | |
791 | } | |
792 | ||
793 | void | |
794 | write_branch_lookup_table(unsigned char *oview) | |
795 | { | |
796 | for (typename Branch_lookup_table::const_iterator p | |
797 | = this->branch_lookup_table_.begin(); | |
798 | p != this->branch_lookup_table_.end(); | |
799 | ++p) | |
800 | { | |
4d5effb9 | 801 | elfcpp::Swap<size, big_endian>::writeval(oview + p->second, p->first); |
ec661b9d AM |
802 | } |
803 | } | |
804 | ||
9e69ed50 AM |
805 | bool |
806 | plt_thread_safe() const | |
807 | { return this->plt_thread_safe_; } | |
808 | ||
b4f7960d AM |
809 | int |
810 | abiversion () const | |
811 | { return this->processor_specific_flags() & elfcpp::EF_PPC64_ABI; } | |
812 | ||
813 | void | |
814 | set_abiversion (int ver) | |
815 | { | |
816 | elfcpp::Elf_Word flags = this->processor_specific_flags(); | |
817 | flags &= ~elfcpp::EF_PPC64_ABI; | |
818 | flags |= ver & elfcpp::EF_PPC64_ABI; | |
819 | this->set_processor_specific_flags(flags); | |
820 | } | |
821 | ||
822 | // Offset to to save stack slot | |
823 | int | |
824 | stk_toc () const | |
825 | { return this->abiversion() < 2 ? 40 : 24; } | |
826 | ||
42cacb20 DE |
827 | private: |
828 | ||
e3deeb9c AM |
829 | class Track_tls |
830 | { | |
831 | public: | |
832 | enum Tls_get_addr | |
833 | { | |
834 | NOT_EXPECTED = 0, | |
835 | EXPECTED = 1, | |
836 | SKIP = 2, | |
837 | NORMAL = 3 | |
838 | }; | |
839 | ||
840 | Track_tls() | |
841 | : tls_get_addr_(NOT_EXPECTED), | |
842 | relinfo_(NULL), relnum_(0), r_offset_(0) | |
843 | { } | |
844 | ||
845 | ~Track_tls() | |
846 | { | |
847 | if (this->tls_get_addr_ != NOT_EXPECTED) | |
848 | this->missing(); | |
849 | } | |
850 | ||
851 | void | |
852 | missing(void) | |
853 | { | |
854 | if (this->relinfo_ != NULL) | |
855 | gold_error_at_location(this->relinfo_, this->relnum_, this->r_offset_, | |
856 | _("missing expected __tls_get_addr call")); | |
857 | } | |
858 | ||
859 | void | |
860 | expect_tls_get_addr_call( | |
861 | const Relocate_info<size, big_endian>* relinfo, | |
862 | size_t relnum, | |
863 | Address r_offset) | |
864 | { | |
865 | this->tls_get_addr_ = EXPECTED; | |
866 | this->relinfo_ = relinfo; | |
867 | this->relnum_ = relnum; | |
868 | this->r_offset_ = r_offset; | |
869 | } | |
870 | ||
871 | void | |
872 | expect_tls_get_addr_call() | |
873 | { this->tls_get_addr_ = EXPECTED; } | |
874 | ||
875 | void | |
876 | skip_next_tls_get_addr_call() | |
877 | {this->tls_get_addr_ = SKIP; } | |
878 | ||
879 | Tls_get_addr | |
880 | maybe_skip_tls_get_addr_call(unsigned int r_type, const Symbol* gsym) | |
881 | { | |
882 | bool is_tls_call = ((r_type == elfcpp::R_POWERPC_REL24 | |
883 | || r_type == elfcpp::R_PPC_PLTREL24) | |
884 | && gsym != NULL | |
885 | && strcmp(gsym->name(), "__tls_get_addr") == 0); | |
886 | Tls_get_addr last_tls = this->tls_get_addr_; | |
887 | this->tls_get_addr_ = NOT_EXPECTED; | |
888 | if (is_tls_call && last_tls != EXPECTED) | |
889 | return last_tls; | |
890 | else if (!is_tls_call && last_tls != NOT_EXPECTED) | |
891 | { | |
892 | this->missing(); | |
893 | return EXPECTED; | |
894 | } | |
895 | return NORMAL; | |
896 | } | |
897 | ||
898 | private: | |
899 | // What we're up to regarding calls to __tls_get_addr. | |
900 | // On powerpc, the branch and link insn making a call to | |
901 | // __tls_get_addr is marked with a relocation, R_PPC64_TLSGD, | |
902 | // R_PPC64_TLSLD, R_PPC_TLSGD or R_PPC_TLSLD, in addition to the | |
903 | // usual R_POWERPC_REL24 or R_PPC_PLTREL25 relocation on a call. | |
904 | // The marker relocation always comes first, and has the same | |
905 | // symbol as the reloc on the insn setting up the __tls_get_addr | |
906 | // argument. This ties the arg setup insn with the call insn, | |
907 | // allowing ld to safely optimize away the call. We check that | |
908 | // every call to __tls_get_addr has a marker relocation, and that | |
909 | // every marker relocation is on a call to __tls_get_addr. | |
910 | Tls_get_addr tls_get_addr_; | |
911 | // Info about the last reloc for error message. | |
912 | const Relocate_info<size, big_endian>* relinfo_; | |
913 | size_t relnum_; | |
914 | Address r_offset_; | |
915 | }; | |
916 | ||
42cacb20 | 917 | // The class which scans relocations. |
e3deeb9c | 918 | class Scan : protected Track_tls |
42cacb20 DE |
919 | { |
920 | public: | |
bfdfa4cd AM |
921 | typedef typename elfcpp::Elf_types<size>::Elf_Addr Address; |
922 | ||
42cacb20 | 923 | Scan() |
e3deeb9c | 924 | : Track_tls(), issued_non_pic_error_(false) |
42cacb20 DE |
925 | { } |
926 | ||
95a2c8d6 | 927 | static inline int |
88b8e639 | 928 | get_reference_flags(unsigned int r_type, const Target_powerpc* target); |
95a2c8d6 | 929 | |
42cacb20 | 930 | inline void |
ad0f2072 | 931 | local(Symbol_table* symtab, Layout* layout, Target_powerpc* target, |
6fa2a40b | 932 | Sized_relobj_file<size, big_endian>* object, |
42cacb20 DE |
933 | unsigned int data_shndx, |
934 | Output_section* output_section, | |
935 | const elfcpp::Rela<size, big_endian>& reloc, unsigned int r_type, | |
bfdfa4cd AM |
936 | const elfcpp::Sym<size, big_endian>& lsym, |
937 | bool is_discarded); | |
42cacb20 DE |
938 | |
939 | inline void | |
ad0f2072 | 940 | global(Symbol_table* symtab, Layout* layout, Target_powerpc* target, |
6fa2a40b | 941 | Sized_relobj_file<size, big_endian>* object, |
42cacb20 DE |
942 | unsigned int data_shndx, |
943 | Output_section* output_section, | |
944 | const elfcpp::Rela<size, big_endian>& reloc, unsigned int r_type, | |
945 | Symbol* gsym); | |
946 | ||
21bb3914 ST |
947 | inline bool |
948 | local_reloc_may_be_function_pointer(Symbol_table* , Layout* , | |
949 | Target_powerpc* , | |
2e702c99 | 950 | Sized_relobj_file<size, big_endian>* , |
21bb3914 | 951 | unsigned int , |
2e702c99 RM |
952 | Output_section* , |
953 | const elfcpp::Rela<size, big_endian>& , | |
4d9aa155 | 954 | unsigned int r_type, |
2e702c99 | 955 | const elfcpp::Sym<size, big_endian>&) |
4d9aa155 AM |
956 | { |
957 | // PowerPC64 .opd is not folded, so any identical function text | |
958 | // may be folded and we'll still keep function addresses distinct. | |
959 | // That means no reloc is of concern here. | |
960 | if (size == 64) | |
961 | return false; | |
962 | // For 32-bit, conservatively assume anything but calls to | |
963 | // function code might be taking the address of the function. | |
964 | return !is_branch_reloc(r_type); | |
965 | } | |
21bb3914 ST |
966 | |
967 | inline bool | |
968 | global_reloc_may_be_function_pointer(Symbol_table* , Layout* , | |
969 | Target_powerpc* , | |
2e702c99 RM |
970 | Sized_relobj_file<size, big_endian>* , |
971 | unsigned int , | |
972 | Output_section* , | |
4d9aa155 AM |
973 | const elfcpp::Rela<size, big_endian>& , |
974 | unsigned int r_type, | |
975 | Symbol*) | |
976 | { | |
977 | // As above. | |
978 | if (size == 64) | |
979 | return false; | |
980 | return !is_branch_reloc(r_type); | |
981 | } | |
21bb3914 | 982 | |
b3ccdeb5 | 983 | static bool |
9055360d AM |
984 | reloc_needs_plt_for_ifunc(Target_powerpc<size, big_endian>* target, |
985 | Sized_relobj_file<size, big_endian>* object, | |
b3ccdeb5 AM |
986 | unsigned int r_type, bool report_err); |
987 | ||
42cacb20 DE |
988 | private: |
989 | static void | |
6fa2a40b | 990 | unsupported_reloc_local(Sized_relobj_file<size, big_endian>*, |
42cacb20 DE |
991 | unsigned int r_type); |
992 | ||
993 | static void | |
6fa2a40b | 994 | unsupported_reloc_global(Sized_relobj_file<size, big_endian>*, |
42cacb20 DE |
995 | unsigned int r_type, Symbol*); |
996 | ||
997 | static void | |
998 | generate_tls_call(Symbol_table* symtab, Layout* layout, | |
999 | Target_powerpc* target); | |
1000 | ||
1001 | void | |
1002 | check_non_pic(Relobj*, unsigned int r_type); | |
1003 | ||
1004 | // Whether we have issued an error about a non-PIC compilation. | |
1005 | bool issued_non_pic_error_; | |
1006 | }; | |
1007 | ||
3ea0a085 | 1008 | Address |
6c77229c AM |
1009 | symval_for_branch(const Symbol_table* symtab, Address value, |
1010 | const Sized_symbol<size>* gsym, | |
3ea0a085 AM |
1011 | Powerpc_relobj<size, big_endian>* object, |
1012 | unsigned int *dest_shndx); | |
1013 | ||
42cacb20 | 1014 | // The class which implements relocation. |
e3deeb9c | 1015 | class Relocate : protected Track_tls |
42cacb20 DE |
1016 | { |
1017 | public: | |
dd93cd0a AM |
1018 | // Use 'at' branch hints when true, 'y' when false. |
1019 | // FIXME maybe: set this with an option. | |
1020 | static const bool is_isa_v2 = true; | |
1021 | ||
dd93cd0a | 1022 | Relocate() |
e3deeb9c | 1023 | : Track_tls() |
dd93cd0a AM |
1024 | { } |
1025 | ||
42cacb20 DE |
1026 | // Do a relocation. Return false if the caller should not issue |
1027 | // any warnings about this relocation. | |
1028 | inline bool | |
1029 | relocate(const Relocate_info<size, big_endian>*, Target_powerpc*, | |
031cdbed ILT |
1030 | Output_section*, size_t relnum, |
1031 | const elfcpp::Rela<size, big_endian>&, | |
42cacb20 DE |
1032 | unsigned int r_type, const Sized_symbol<size>*, |
1033 | const Symbol_value<size>*, | |
1034 | unsigned char*, | |
1035 | typename elfcpp::Elf_types<size>::Elf_Addr, | |
1036 | section_size_type); | |
42cacb20 DE |
1037 | }; |
1038 | ||
168a4726 AM |
1039 | class Relocate_comdat_behavior |
1040 | { | |
1041 | public: | |
1042 | // Decide what the linker should do for relocations that refer to | |
1043 | // discarded comdat sections. | |
1044 | inline Comdat_behavior | |
1045 | get(const char* name) | |
1046 | { | |
1047 | gold::Default_comdat_behavior default_behavior; | |
1048 | Comdat_behavior ret = default_behavior.get(name); | |
1049 | if (ret == CB_WARNING) | |
1050 | { | |
1051 | if (size == 32 | |
1052 | && (strcmp(name, ".fixup") == 0 | |
1053 | || strcmp(name, ".got2") == 0)) | |
1054 | ret = CB_IGNORE; | |
1055 | if (size == 64 | |
1056 | && (strcmp(name, ".opd") == 0 | |
1057 | || strcmp(name, ".toc") == 0 | |
1058 | || strcmp(name, ".toc1") == 0)) | |
1059 | ret = CB_IGNORE; | |
1060 | } | |
1061 | return ret; | |
1062 | } | |
1063 | }; | |
1064 | ||
42cacb20 DE |
1065 | // A class which returns the size required for a relocation type, |
1066 | // used while scanning relocs during a relocatable link. | |
1067 | class Relocatable_size_for_reloc | |
1068 | { | |
1069 | public: | |
1070 | unsigned int | |
cf43a2fe AM |
1071 | get_size_for_reloc(unsigned int, Relobj*) |
1072 | { | |
1073 | gold_unreachable(); | |
1074 | return 0; | |
1075 | } | |
42cacb20 DE |
1076 | }; |
1077 | ||
dd93cd0a AM |
1078 | // Optimize the TLS relocation type based on what we know about the |
1079 | // symbol. IS_FINAL is true if the final address of this symbol is | |
1080 | // known at link time. | |
1081 | ||
1082 | tls::Tls_optimization | |
1083 | optimize_tls_gd(bool is_final) | |
1084 | { | |
1085 | // If we are generating a shared library, then we can't do anything | |
1086 | // in the linker. | |
1087 | if (parameters->options().shared()) | |
1088 | return tls::TLSOPT_NONE; | |
1089 | ||
1090 | if (!is_final) | |
1091 | return tls::TLSOPT_TO_IE; | |
1092 | return tls::TLSOPT_TO_LE; | |
1093 | } | |
1094 | ||
1095 | tls::Tls_optimization | |
1096 | optimize_tls_ld() | |
1097 | { | |
1098 | if (parameters->options().shared()) | |
1099 | return tls::TLSOPT_NONE; | |
1100 | ||
1101 | return tls::TLSOPT_TO_LE; | |
1102 | } | |
1103 | ||
1104 | tls::Tls_optimization | |
1105 | optimize_tls_ie(bool is_final) | |
1106 | { | |
1107 | if (!is_final || parameters->options().shared()) | |
1108 | return tls::TLSOPT_NONE; | |
1109 | ||
1110 | return tls::TLSOPT_TO_LE; | |
1111 | } | |
cf43a2fe | 1112 | |
cf43a2fe AM |
1113 | // Create glink. |
1114 | void | |
1115 | make_glink_section(Layout*); | |
42cacb20 | 1116 | |
cf43a2fe AM |
1117 | // Create the PLT section. |
1118 | void | |
40b469d7 | 1119 | make_plt_section(Symbol_table*, Layout*); |
42cacb20 | 1120 | |
e5d5f5ed | 1121 | void |
40b469d7 | 1122 | make_iplt_section(Symbol_table*, Layout*); |
e5d5f5ed | 1123 | |
ec661b9d AM |
1124 | void |
1125 | make_brlt_section(Layout*); | |
1126 | ||
42cacb20 DE |
1127 | // Create a PLT entry for a global symbol. |
1128 | void | |
ec661b9d | 1129 | make_plt_entry(Symbol_table*, Layout*, Symbol*); |
e5d5f5ed AM |
1130 | |
1131 | // Create a PLT entry for a local IFUNC symbol. | |
1132 | void | |
40b469d7 | 1133 | make_local_ifunc_plt_entry(Symbol_table*, Layout*, |
ec661b9d AM |
1134 | Sized_relobj_file<size, big_endian>*, |
1135 | unsigned int); | |
1136 | ||
42cacb20 | 1137 | |
dd93cd0a AM |
1138 | // Create a GOT entry for local dynamic __tls_get_addr. |
1139 | unsigned int | |
1140 | tlsld_got_offset(Symbol_table* symtab, Layout* layout, | |
1141 | Sized_relobj_file<size, big_endian>* object); | |
1142 | ||
42cacb20 | 1143 | unsigned int |
dd93cd0a AM |
1144 | tlsld_got_offset() const |
1145 | { | |
1146 | return this->tlsld_got_offset_; | |
1147 | } | |
42cacb20 | 1148 | |
42cacb20 DE |
1149 | // Get the dynamic reloc section, creating it if necessary. |
1150 | Reloc_section* | |
1151 | rela_dyn_section(Layout*); | |
1152 | ||
b3ccdeb5 AM |
1153 | // Similarly, but for ifunc symbols get the one for ifunc. |
1154 | Reloc_section* | |
1155 | rela_dyn_section(Symbol_table*, Layout*, bool for_ifunc); | |
1156 | ||
42cacb20 DE |
1157 | // Copy a relocation against a global symbol. |
1158 | void | |
ef9beddf | 1159 | copy_reloc(Symbol_table* symtab, Layout* layout, |
2e702c99 | 1160 | Sized_relobj_file<size, big_endian>* object, |
42cacb20 DE |
1161 | unsigned int shndx, Output_section* output_section, |
1162 | Symbol* sym, const elfcpp::Rela<size, big_endian>& reloc) | |
1163 | { | |
1164 | this->copy_relocs_.copy_reloc(symtab, layout, | |
1165 | symtab->get_sized_symbol<size>(sym), | |
1166 | object, shndx, output_section, | |
1167 | reloc, this->rela_dyn_section(layout)); | |
1168 | } | |
1169 | ||
0cfdc767 | 1170 | // Look over all the input sections, deciding where to place stubs. |
ec661b9d AM |
1171 | void |
1172 | group_sections(Layout*, const Task*); | |
1173 | ||
1174 | // Sort output sections by address. | |
1175 | struct Sort_sections | |
1176 | { | |
1177 | bool | |
1178 | operator()(const Output_section* sec1, const Output_section* sec2) | |
1179 | { return sec1->address() < sec2->address(); } | |
1180 | }; | |
1181 | ||
1182 | class Branch_info | |
1183 | { | |
1184 | public: | |
1185 | Branch_info(Powerpc_relobj<size, big_endian>* ppc_object, | |
1186 | unsigned int data_shndx, | |
1187 | Address r_offset, | |
1188 | unsigned int r_type, | |
1189 | unsigned int r_sym, | |
1190 | Address addend) | |
1191 | : object_(ppc_object), shndx_(data_shndx), offset_(r_offset), | |
1192 | r_type_(r_type), r_sym_(r_sym), addend_(addend) | |
1193 | { } | |
1194 | ||
1195 | ~Branch_info() | |
1196 | { } | |
1197 | ||
1198 | // If this branch needs a plt call stub, or a long branch stub, make one. | |
1199 | void | |
1200 | make_stub(Stub_table<size, big_endian>*, | |
1201 | Stub_table<size, big_endian>*, | |
1202 | Symbol_table*) const; | |
1203 | ||
1204 | private: | |
1205 | // The branch location.. | |
1206 | Powerpc_relobj<size, big_endian>* object_; | |
1207 | unsigned int shndx_; | |
1208 | Address offset_; | |
1209 | // ..and the branch type and destination. | |
1210 | unsigned int r_type_; | |
1211 | unsigned int r_sym_; | |
1212 | Address addend_; | |
1213 | }; | |
1214 | ||
42cacb20 DE |
1215 | // Information about this specific target which we pass to the |
1216 | // general Target structure. | |
1217 | static Target::Target_info powerpc_info; | |
1218 | ||
1219 | // The types of GOT entries needed for this platform. | |
0e70b911 CC |
1220 | // These values are exposed to the ABI in an incremental link. |
1221 | // Do not renumber existing values without changing the version | |
1222 | // number of the .gnu_incremental_inputs section. | |
42cacb20 DE |
1223 | enum Got_type |
1224 | { | |
dd93cd0a AM |
1225 | GOT_TYPE_STANDARD, |
1226 | GOT_TYPE_TLSGD, // double entry for @got@tlsgd | |
1227 | GOT_TYPE_DTPREL, // entry for @got@dtprel | |
1228 | GOT_TYPE_TPREL // entry for @got@tprel | |
42cacb20 DE |
1229 | }; |
1230 | ||
ec661b9d | 1231 | // The GOT section. |
cf43a2fe | 1232 | Output_data_got_powerpc<size, big_endian>* got_; |
b3ccdeb5 AM |
1233 | // The PLT section. This is a container for a table of addresses, |
1234 | // and their relocations. Each address in the PLT has a dynamic | |
1235 | // relocation (R_*_JMP_SLOT) and each address will have a | |
1236 | // corresponding entry in .glink for lazy resolution of the PLT. | |
1237 | // ppc32 initialises the PLT to point at the .glink entry, while | |
1238 | // ppc64 leaves this to ld.so. To make a call via the PLT, the | |
1239 | // linker adds a stub that loads the PLT entry into ctr then | |
1240 | // branches to ctr. There may be more than one stub for each PLT | |
1241 | // entry. DT_JMPREL points at the first PLT dynamic relocation and | |
1242 | // DT_PLTRELSZ gives the total size of PLT dynamic relocations. | |
42cacb20 | 1243 | Output_data_plt_powerpc<size, big_endian>* plt_; |
b3ccdeb5 AM |
1244 | // The IPLT section. Like plt_, this is a container for a table of |
1245 | // addresses and their relocations, specifically for STT_GNU_IFUNC | |
1246 | // functions that resolve locally (STT_GNU_IFUNC functions that | |
1247 | // don't resolve locally go in PLT). Unlike plt_, these have no | |
1248 | // entry in .glink for lazy resolution, and the relocation section | |
1249 | // does not have a 1-1 correspondence with IPLT addresses. In fact, | |
1250 | // the relocation section may contain relocations against | |
1251 | // STT_GNU_IFUNC symbols at locations outside of IPLT. The | |
1252 | // relocation section will appear at the end of other dynamic | |
1253 | // relocations, so that ld.so applies these relocations after other | |
1254 | // dynamic relocations. In a static executable, the relocation | |
1255 | // section is emitted and marked with __rela_iplt_start and | |
1256 | // __rela_iplt_end symbols. | |
e5d5f5ed | 1257 | Output_data_plt_powerpc<size, big_endian>* iplt_; |
ec661b9d AM |
1258 | // Section holding long branch destinations. |
1259 | Output_data_brlt_powerpc<size, big_endian>* brlt_section_; | |
1260 | // The .glink section. | |
cf43a2fe | 1261 | Output_data_glink<size, big_endian>* glink_; |
ec661b9d | 1262 | // The dynamic reloc section. |
42cacb20 DE |
1263 | Reloc_section* rela_dyn_; |
1264 | // Relocs saved to avoid a COPY reloc. | |
1265 | Copy_relocs<elfcpp::SHT_RELA, size, big_endian> copy_relocs_; | |
dd93cd0a AM |
1266 | // Offset of the GOT entry for local dynamic __tls_get_addr calls. |
1267 | unsigned int tlsld_got_offset_; | |
ec661b9d AM |
1268 | |
1269 | Stub_tables stub_tables_; | |
1270 | typedef Unordered_map<Address, unsigned int> Branch_lookup_table; | |
1271 | Branch_lookup_table branch_lookup_table_; | |
1272 | ||
1273 | typedef std::vector<Branch_info> Branches; | |
1274 | Branches branch_info_; | |
9e69ed50 AM |
1275 | |
1276 | bool plt_thread_safe_; | |
42cacb20 DE |
1277 | }; |
1278 | ||
1279 | template<> | |
1280 | Target::Target_info Target_powerpc<32, true>::powerpc_info = | |
1281 | { | |
1282 | 32, // size | |
1283 | true, // is_big_endian | |
1284 | elfcpp::EM_PPC, // machine_code | |
1285 | false, // has_make_symbol | |
1286 | false, // has_resolve | |
1287 | false, // has_code_fill | |
1288 | true, // is_default_stack_executable | |
b3ce541e | 1289 | false, // can_icf_inline_merge_sections |
42cacb20 DE |
1290 | '\0', // wrap_char |
1291 | "/usr/lib/ld.so.1", // dynamic_linker | |
1292 | 0x10000000, // default_text_segment_address | |
1293 | 64 * 1024, // abi_pagesize (overridable by -z max-page-size) | |
8a5e3e08 | 1294 | 4 * 1024, // common_pagesize (overridable by -z common-page-size) |
c9269dff AM |
1295 | false, // isolate_execinstr |
1296 | 0, // rosegment_gap | |
8a5e3e08 ILT |
1297 | elfcpp::SHN_UNDEF, // small_common_shndx |
1298 | elfcpp::SHN_UNDEF, // large_common_shndx | |
1299 | 0, // small_common_section_flags | |
05a352e6 DK |
1300 | 0, // large_common_section_flags |
1301 | NULL, // attributes_section | |
a67858e0 CC |
1302 | NULL, // attributes_vendor |
1303 | "_start" // entry_symbol_name | |
42cacb20 DE |
1304 | }; |
1305 | ||
1306 | template<> | |
1307 | Target::Target_info Target_powerpc<32, false>::powerpc_info = | |
1308 | { | |
1309 | 32, // size | |
1310 | false, // is_big_endian | |
1311 | elfcpp::EM_PPC, // machine_code | |
1312 | false, // has_make_symbol | |
1313 | false, // has_resolve | |
1314 | false, // has_code_fill | |
1315 | true, // is_default_stack_executable | |
b3ce541e | 1316 | false, // can_icf_inline_merge_sections |
42cacb20 DE |
1317 | '\0', // wrap_char |
1318 | "/usr/lib/ld.so.1", // dynamic_linker | |
1319 | 0x10000000, // default_text_segment_address | |
1320 | 64 * 1024, // abi_pagesize (overridable by -z max-page-size) | |
8a5e3e08 | 1321 | 4 * 1024, // common_pagesize (overridable by -z common-page-size) |
c9269dff AM |
1322 | false, // isolate_execinstr |
1323 | 0, // rosegment_gap | |
8a5e3e08 ILT |
1324 | elfcpp::SHN_UNDEF, // small_common_shndx |
1325 | elfcpp::SHN_UNDEF, // large_common_shndx | |
1326 | 0, // small_common_section_flags | |
05a352e6 DK |
1327 | 0, // large_common_section_flags |
1328 | NULL, // attributes_section | |
a67858e0 CC |
1329 | NULL, // attributes_vendor |
1330 | "_start" // entry_symbol_name | |
42cacb20 DE |
1331 | }; |
1332 | ||
1333 | template<> | |
1334 | Target::Target_info Target_powerpc<64, true>::powerpc_info = | |
1335 | { | |
1336 | 64, // size | |
1337 | true, // is_big_endian | |
1338 | elfcpp::EM_PPC64, // machine_code | |
1339 | false, // has_make_symbol | |
1340 | false, // has_resolve | |
1341 | false, // has_code_fill | |
1342 | true, // is_default_stack_executable | |
b3ce541e | 1343 | false, // can_icf_inline_merge_sections |
42cacb20 DE |
1344 | '\0', // wrap_char |
1345 | "/usr/lib/ld.so.1", // dynamic_linker | |
1346 | 0x10000000, // default_text_segment_address | |
1347 | 64 * 1024, // abi_pagesize (overridable by -z max-page-size) | |
dd93cd0a | 1348 | 4 * 1024, // common_pagesize (overridable by -z common-page-size) |
c9269dff AM |
1349 | false, // isolate_execinstr |
1350 | 0, // rosegment_gap | |
8a5e3e08 ILT |
1351 | elfcpp::SHN_UNDEF, // small_common_shndx |
1352 | elfcpp::SHN_UNDEF, // large_common_shndx | |
1353 | 0, // small_common_section_flags | |
05a352e6 DK |
1354 | 0, // large_common_section_flags |
1355 | NULL, // attributes_section | |
a67858e0 CC |
1356 | NULL, // attributes_vendor |
1357 | "_start" // entry_symbol_name | |
42cacb20 DE |
1358 | }; |
1359 | ||
1360 | template<> | |
1361 | Target::Target_info Target_powerpc<64, false>::powerpc_info = | |
1362 | { | |
1363 | 64, // size | |
1364 | false, // is_big_endian | |
1365 | elfcpp::EM_PPC64, // machine_code | |
1366 | false, // has_make_symbol | |
1367 | false, // has_resolve | |
1368 | false, // has_code_fill | |
1369 | true, // is_default_stack_executable | |
b3ce541e | 1370 | false, // can_icf_inline_merge_sections |
42cacb20 DE |
1371 | '\0', // wrap_char |
1372 | "/usr/lib/ld.so.1", // dynamic_linker | |
1373 | 0x10000000, // default_text_segment_address | |
1374 | 64 * 1024, // abi_pagesize (overridable by -z max-page-size) | |
dd93cd0a | 1375 | 4 * 1024, // common_pagesize (overridable by -z common-page-size) |
c9269dff AM |
1376 | false, // isolate_execinstr |
1377 | 0, // rosegment_gap | |
8a5e3e08 ILT |
1378 | elfcpp::SHN_UNDEF, // small_common_shndx |
1379 | elfcpp::SHN_UNDEF, // large_common_shndx | |
1380 | 0, // small_common_section_flags | |
05a352e6 DK |
1381 | 0, // large_common_section_flags |
1382 | NULL, // attributes_section | |
a67858e0 CC |
1383 | NULL, // attributes_vendor |
1384 | "_start" // entry_symbol_name | |
42cacb20 DE |
1385 | }; |
1386 | ||
dd93cd0a AM |
1387 | inline bool |
1388 | is_branch_reloc(unsigned int r_type) | |
1389 | { | |
1390 | return (r_type == elfcpp::R_POWERPC_REL24 | |
1391 | || r_type == elfcpp::R_PPC_PLTREL24 | |
1392 | || r_type == elfcpp::R_PPC_LOCAL24PC | |
1393 | || r_type == elfcpp::R_POWERPC_REL14 | |
1394 | || r_type == elfcpp::R_POWERPC_REL14_BRTAKEN | |
1395 | || r_type == elfcpp::R_POWERPC_REL14_BRNTAKEN | |
1396 | || r_type == elfcpp::R_POWERPC_ADDR24 | |
1397 | || r_type == elfcpp::R_POWERPC_ADDR14 | |
1398 | || r_type == elfcpp::R_POWERPC_ADDR14_BRTAKEN | |
1399 | || r_type == elfcpp::R_POWERPC_ADDR14_BRNTAKEN); | |
1400 | } | |
1401 | ||
1402 | // If INSN is an opcode that may be used with an @tls operand, return | |
1403 | // the transformed insn for TLS optimisation, otherwise return 0. If | |
1404 | // REG is non-zero only match an insn with RB or RA equal to REG. | |
1405 | uint32_t | |
1406 | at_tls_transform(uint32_t insn, unsigned int reg) | |
1407 | { | |
1408 | if ((insn & (0x3f << 26)) != 31 << 26) | |
1409 | return 0; | |
1410 | ||
1411 | unsigned int rtra; | |
1412 | if (reg == 0 || ((insn >> 11) & 0x1f) == reg) | |
1413 | rtra = insn & ((1 << 26) - (1 << 16)); | |
1414 | else if (((insn >> 16) & 0x1f) == reg) | |
1415 | rtra = (insn & (0x1f << 21)) | ((insn & (0x1f << 11)) << 5); | |
1416 | else | |
1417 | return 0; | |
1418 | ||
1419 | if ((insn & (0x3ff << 1)) == 266 << 1) | |
1420 | // add -> addi | |
1421 | insn = 14 << 26; | |
1422 | else if ((insn & (0x1f << 1)) == 23 << 1 | |
1423 | && ((insn & (0x1f << 6)) < 14 << 6 | |
1424 | || ((insn & (0x1f << 6)) >= 16 << 6 | |
1425 | && (insn & (0x1f << 6)) < 24 << 6))) | |
1426 | // load and store indexed -> dform | |
1427 | insn = (32 | ((insn >> 6) & 0x1f)) << 26; | |
1428 | else if ((insn & (((0x1a << 5) | 0x1f) << 1)) == 21 << 1) | |
1429 | // ldx, ldux, stdx, stdux -> ld, ldu, std, stdu | |
1430 | insn = ((58 | ((insn >> 6) & 4)) << 26) | ((insn >> 6) & 1); | |
1431 | else if ((insn & (((0x1f << 5) | 0x1f) << 1)) == 341 << 1) | |
1432 | // lwax -> lwa | |
1433 | insn = (58 << 26) | 2; | |
1434 | else | |
1435 | return 0; | |
1436 | insn |= rtra; | |
1437 | return insn; | |
1438 | } | |
1439 | ||
dd93cd0a | 1440 | |
42cacb20 DE |
1441 | template<int size, bool big_endian> |
1442 | class Powerpc_relocate_functions | |
1443 | { | |
dd93cd0a | 1444 | public: |
f4baf0d4 | 1445 | enum Overflow_check |
dd93cd0a | 1446 | { |
f4baf0d4 AM |
1447 | CHECK_NONE, |
1448 | CHECK_SIGNED, | |
b80eed39 AM |
1449 | CHECK_UNSIGNED, |
1450 | CHECK_BITFIELD, | |
1451 | CHECK_LOW_INSN, | |
1452 | CHECK_HIGH_INSN | |
dd93cd0a AM |
1453 | }; |
1454 | ||
f4baf0d4 | 1455 | enum Status |
dd93cd0a | 1456 | { |
f4baf0d4 AM |
1457 | STATUS_OK, |
1458 | STATUS_OVERFLOW | |
1459 | }; | |
dd93cd0a | 1460 | |
42cacb20 | 1461 | private: |
c9269dff | 1462 | typedef Powerpc_relocate_functions<size, big_endian> This; |
c9269dff AM |
1463 | typedef typename elfcpp::Elf_types<size>::Elf_Addr Address; |
1464 | ||
dd93cd0a AM |
1465 | template<int valsize> |
1466 | static inline bool | |
1467 | has_overflow_signed(Address value) | |
1468 | { | |
1469 | // limit = 1 << (valsize - 1) without shift count exceeding size of type | |
1470 | Address limit = static_cast<Address>(1) << ((valsize - 1) >> 1); | |
1471 | limit <<= ((valsize - 1) >> 1); | |
1472 | limit <<= ((valsize - 1) - 2 * ((valsize - 1) >> 1)); | |
1473 | return value + limit > (limit << 1) - 1; | |
1474 | } | |
1475 | ||
1476 | template<int valsize> | |
1477 | static inline bool | |
b80eed39 | 1478 | has_overflow_unsigned(Address value) |
dd93cd0a AM |
1479 | { |
1480 | Address limit = static_cast<Address>(1) << ((valsize - 1) >> 1); | |
1481 | limit <<= ((valsize - 1) >> 1); | |
1482 | limit <<= ((valsize - 1) - 2 * ((valsize - 1) >> 1)); | |
b80eed39 AM |
1483 | return value > (limit << 1) - 1; |
1484 | } | |
1485 | ||
1486 | template<int valsize> | |
1487 | static inline bool | |
1488 | has_overflow_bitfield(Address value) | |
1489 | { | |
1490 | return (has_overflow_unsigned<valsize>(value) | |
1491 | && has_overflow_signed<valsize>(value)); | |
dd93cd0a AM |
1492 | } |
1493 | ||
1494 | template<int valsize> | |
f4baf0d4 AM |
1495 | static inline Status |
1496 | overflowed(Address value, Overflow_check overflow) | |
dd93cd0a | 1497 | { |
f4baf0d4 | 1498 | if (overflow == CHECK_SIGNED) |
dd93cd0a AM |
1499 | { |
1500 | if (has_overflow_signed<valsize>(value)) | |
f4baf0d4 | 1501 | return STATUS_OVERFLOW; |
dd93cd0a | 1502 | } |
b80eed39 AM |
1503 | else if (overflow == CHECK_UNSIGNED) |
1504 | { | |
1505 | if (has_overflow_unsigned<valsize>(value)) | |
1506 | return STATUS_OVERFLOW; | |
1507 | } | |
f4baf0d4 | 1508 | else if (overflow == CHECK_BITFIELD) |
dd93cd0a AM |
1509 | { |
1510 | if (has_overflow_bitfield<valsize>(value)) | |
f4baf0d4 | 1511 | return STATUS_OVERFLOW; |
dd93cd0a | 1512 | } |
f4baf0d4 | 1513 | return STATUS_OK; |
dd93cd0a AM |
1514 | } |
1515 | ||
cf43a2fe | 1516 | // Do a simple RELA relocation |
42cacb20 | 1517 | template<int valsize> |
f4baf0d4 AM |
1518 | static inline Status |
1519 | rela(unsigned char* view, Address value, Overflow_check overflow) | |
dd93cd0a AM |
1520 | { |
1521 | typedef typename elfcpp::Swap<valsize, big_endian>::Valtype Valtype; | |
1522 | Valtype* wv = reinterpret_cast<Valtype*>(view); | |
1523 | elfcpp::Swap<valsize, big_endian>::writeval(wv, value); | |
1524 | return overflowed<valsize>(value, overflow); | |
1525 | } | |
1526 | ||
1527 | template<int valsize> | |
f4baf0d4 | 1528 | static inline Status |
42cacb20 DE |
1529 | rela(unsigned char* view, |
1530 | unsigned int right_shift, | |
c9269dff AM |
1531 | typename elfcpp::Valtype_base<valsize>::Valtype dst_mask, |
1532 | Address value, | |
f4baf0d4 | 1533 | Overflow_check overflow) |
42cacb20 DE |
1534 | { |
1535 | typedef typename elfcpp::Swap<valsize, big_endian>::Valtype Valtype; | |
1536 | Valtype* wv = reinterpret_cast<Valtype*>(view); | |
1537 | Valtype val = elfcpp::Swap<valsize, big_endian>::readval(wv); | |
dd93cd0a | 1538 | Valtype reloc = value >> right_shift; |
42cacb20 DE |
1539 | val &= ~dst_mask; |
1540 | reloc &= dst_mask; | |
42cacb20 | 1541 | elfcpp::Swap<valsize, big_endian>::writeval(wv, val | reloc); |
dd93cd0a | 1542 | return overflowed<valsize>(value >> right_shift, overflow); |
42cacb20 DE |
1543 | } |
1544 | ||
cf43a2fe | 1545 | // Do a simple RELA relocation, unaligned. |
42cacb20 | 1546 | template<int valsize> |
f4baf0d4 AM |
1547 | static inline Status |
1548 | rela_ua(unsigned char* view, Address value, Overflow_check overflow) | |
dd93cd0a AM |
1549 | { |
1550 | elfcpp::Swap_unaligned<valsize, big_endian>::writeval(view, value); | |
1551 | return overflowed<valsize>(value, overflow); | |
1552 | } | |
1553 | ||
1554 | template<int valsize> | |
f4baf0d4 | 1555 | static inline Status |
cf43a2fe AM |
1556 | rela_ua(unsigned char* view, |
1557 | unsigned int right_shift, | |
c9269dff AM |
1558 | typename elfcpp::Valtype_base<valsize>::Valtype dst_mask, |
1559 | Address value, | |
f4baf0d4 | 1560 | Overflow_check overflow) |
42cacb20 | 1561 | { |
c9269dff AM |
1562 | typedef typename elfcpp::Swap_unaligned<valsize, big_endian>::Valtype |
1563 | Valtype; | |
dd93cd0a AM |
1564 | Valtype val = elfcpp::Swap<valsize, big_endian>::readval(view); |
1565 | Valtype reloc = value >> right_shift; | |
42cacb20 DE |
1566 | val &= ~dst_mask; |
1567 | reloc &= dst_mask; | |
dd93cd0a AM |
1568 | elfcpp::Swap_unaligned<valsize, big_endian>::writeval(view, val | reloc); |
1569 | return overflowed<valsize>(value >> right_shift, overflow); | |
42cacb20 DE |
1570 | } |
1571 | ||
42cacb20 | 1572 | public: |
dd93cd0a | 1573 | // R_PPC64_ADDR64: (Symbol + Addend) |
42cacb20 | 1574 | static inline void |
dd93cd0a | 1575 | addr64(unsigned char* view, Address value) |
f4baf0d4 | 1576 | { This::template rela<64>(view, value, CHECK_NONE); } |
42cacb20 | 1577 | |
dd93cd0a | 1578 | // R_PPC64_UADDR64: (Symbol + Addend) unaligned |
42cacb20 | 1579 | static inline void |
dd93cd0a | 1580 | addr64_u(unsigned char* view, Address value) |
f4baf0d4 | 1581 | { This::template rela_ua<64>(view, value, CHECK_NONE); } |
dd93cd0a AM |
1582 | |
1583 | // R_POWERPC_ADDR32: (Symbol + Addend) | |
f4baf0d4 AM |
1584 | static inline Status |
1585 | addr32(unsigned char* view, Address value, Overflow_check overflow) | |
dd93cd0a AM |
1586 | { return This::template rela<32>(view, value, overflow); } |
1587 | ||
1588 | // R_POWERPC_UADDR32: (Symbol + Addend) unaligned | |
f4baf0d4 AM |
1589 | static inline Status |
1590 | addr32_u(unsigned char* view, Address value, Overflow_check overflow) | |
dd93cd0a AM |
1591 | { return This::template rela_ua<32>(view, value, overflow); } |
1592 | ||
1593 | // R_POWERPC_ADDR24: (Symbol + Addend) & 0x3fffffc | |
f4baf0d4 AM |
1594 | static inline Status |
1595 | addr24(unsigned char* view, Address value, Overflow_check overflow) | |
dd93cd0a | 1596 | { |
f4baf0d4 AM |
1597 | Status stat = This::template rela<32>(view, 0, 0x03fffffc, value, overflow); |
1598 | if (overflow != CHECK_NONE && (value & 3) != 0) | |
1599 | stat = STATUS_OVERFLOW; | |
dd93cd0a AM |
1600 | return stat; |
1601 | } | |
42cacb20 DE |
1602 | |
1603 | // R_POWERPC_ADDR16: (Symbol + Addend) & 0xffff | |
f4baf0d4 AM |
1604 | static inline Status |
1605 | addr16(unsigned char* view, Address value, Overflow_check overflow) | |
dd93cd0a | 1606 | { return This::template rela<16>(view, value, overflow); } |
42cacb20 | 1607 | |
dd93cd0a | 1608 | // R_POWERPC_ADDR16: (Symbol + Addend) & 0xffff, unaligned |
f4baf0d4 AM |
1609 | static inline Status |
1610 | addr16_u(unsigned char* view, Address value, Overflow_check overflow) | |
dd93cd0a | 1611 | { return This::template rela_ua<16>(view, value, overflow); } |
42cacb20 | 1612 | |
dd93cd0a | 1613 | // R_POWERPC_ADDR16_DS: (Symbol + Addend) & 0xfffc |
f4baf0d4 AM |
1614 | static inline Status |
1615 | addr16_ds(unsigned char* view, Address value, Overflow_check overflow) | |
dd93cd0a | 1616 | { |
f4baf0d4 AM |
1617 | Status stat = This::template rela<16>(view, 0, 0xfffc, value, overflow); |
1618 | if (overflow != CHECK_NONE && (value & 3) != 0) | |
1619 | stat = STATUS_OVERFLOW; | |
dd93cd0a AM |
1620 | return stat; |
1621 | } | |
42cacb20 | 1622 | |
42cacb20 DE |
1623 | // R_POWERPC_ADDR16_HI: ((Symbol + Addend) >> 16) & 0xffff |
1624 | static inline void | |
dd93cd0a | 1625 | addr16_hi(unsigned char* view, Address value) |
f4baf0d4 | 1626 | { This::template rela<16>(view, 16, 0xffff, value, CHECK_NONE); } |
42cacb20 | 1627 | |
c9269dff | 1628 | // R_POWERPC_ADDR16_HA: ((Symbol + Addend + 0x8000) >> 16) & 0xffff |
42cacb20 | 1629 | static inline void |
dd93cd0a AM |
1630 | addr16_ha(unsigned char* view, Address value) |
1631 | { This::addr16_hi(view, value + 0x8000); } | |
42cacb20 | 1632 | |
dd93cd0a | 1633 | // R_POWERPC_ADDR16_HIGHER: ((Symbol + Addend) >> 32) & 0xffff |
42cacb20 | 1634 | static inline void |
dd93cd0a | 1635 | addr16_hi2(unsigned char* view, Address value) |
f4baf0d4 | 1636 | { This::template rela<16>(view, 32, 0xffff, value, CHECK_NONE); } |
42cacb20 | 1637 | |
dd93cd0a | 1638 | // R_POWERPC_ADDR16_HIGHERA: ((Symbol + Addend + 0x8000) >> 32) & 0xffff |
42cacb20 | 1639 | static inline void |
dd93cd0a AM |
1640 | addr16_ha2(unsigned char* view, Address value) |
1641 | { This::addr16_hi2(view, value + 0x8000); } | |
42cacb20 | 1642 | |
dd93cd0a | 1643 | // R_POWERPC_ADDR16_HIGHEST: ((Symbol + Addend) >> 48) & 0xffff |
42cacb20 | 1644 | static inline void |
dd93cd0a | 1645 | addr16_hi3(unsigned char* view, Address value) |
f4baf0d4 | 1646 | { This::template rela<16>(view, 48, 0xffff, value, CHECK_NONE); } |
42cacb20 | 1647 | |
dd93cd0a | 1648 | // R_POWERPC_ADDR16_HIGHESTA: ((Symbol + Addend + 0x8000) >> 48) & 0xffff |
42cacb20 | 1649 | static inline void |
dd93cd0a AM |
1650 | addr16_ha3(unsigned char* view, Address value) |
1651 | { This::addr16_hi3(view, value + 0x8000); } | |
1652 | ||
1653 | // R_POWERPC_ADDR14: (Symbol + Addend) & 0xfffc | |
f4baf0d4 AM |
1654 | static inline Status |
1655 | addr14(unsigned char* view, Address value, Overflow_check overflow) | |
dd93cd0a | 1656 | { |
f4baf0d4 AM |
1657 | Status stat = This::template rela<32>(view, 0, 0xfffc, value, overflow); |
1658 | if (overflow != CHECK_NONE && (value & 3) != 0) | |
1659 | stat = STATUS_OVERFLOW; | |
dd93cd0a AM |
1660 | return stat; |
1661 | } | |
cf43a2fe AM |
1662 | }; |
1663 | ||
b4f7960d AM |
1664 | // Set ABI version for input and output. |
1665 | ||
1666 | template<int size, bool big_endian> | |
1667 | void | |
1668 | Powerpc_relobj<size, big_endian>::set_abiversion(int ver) | |
1669 | { | |
1670 | this->e_flags_ |= ver; | |
1671 | if (this->abiversion() != 0) | |
1672 | { | |
1673 | Target_powerpc<size, big_endian>* target = | |
1674 | static_cast<Target_powerpc<size, big_endian>*>( | |
1675 | parameters->sized_target<size, big_endian>()); | |
1676 | if (target->abiversion() == 0) | |
1677 | target->set_abiversion(this->abiversion()); | |
1678 | else if (target->abiversion() != this->abiversion()) | |
1679 | gold_error(_("%s: ABI version %d is not compatible " | |
1680 | "with ABI version %d output"), | |
1681 | this->name().c_str(), | |
1682 | this->abiversion(), target->abiversion()); | |
1683 | ||
1684 | } | |
1685 | } | |
1686 | ||
c9269dff AM |
1687 | // Stash away the index of .got2 or .opd in a relocatable object, if |
1688 | // such a section exists. | |
cf43a2fe AM |
1689 | |
1690 | template<int size, bool big_endian> | |
1691 | bool | |
1692 | Powerpc_relobj<size, big_endian>::do_find_special_sections( | |
1693 | Read_symbols_data* sd) | |
1694 | { | |
c9269dff AM |
1695 | const unsigned char* const pshdrs = sd->section_headers->data(); |
1696 | const unsigned char* namesu = sd->section_names->data(); | |
1697 | const char* names = reinterpret_cast<const char*>(namesu); | |
1698 | section_size_type names_size = sd->section_names_size; | |
1699 | const unsigned char* s; | |
1700 | ||
dc3714f3 AM |
1701 | s = this->template find_shdr<size, big_endian>(pshdrs, |
1702 | size == 32 ? ".got2" : ".opd", | |
1703 | names, names_size, NULL); | |
c9269dff AM |
1704 | if (s != NULL) |
1705 | { | |
1706 | unsigned int ndx = (s - pshdrs) / elfcpp::Elf_sizes<size>::shdr_size; | |
1707 | this->special_ = ndx; | |
b4f7960d AM |
1708 | if (size == 64) |
1709 | { | |
1710 | if (this->abiversion() == 0) | |
1711 | this->set_abiversion(1); | |
1712 | else if (this->abiversion() > 1) | |
1713 | gold_error(_("%s: .opd invalid in abiv%d"), | |
1714 | this->name().c_str(), this->abiversion()); | |
1715 | } | |
c9269dff AM |
1716 | } |
1717 | return Sized_relobj_file<size, big_endian>::do_find_special_sections(sd); | |
1718 | } | |
1719 | ||
1720 | // Examine .rela.opd to build info about function entry points. | |
1721 | ||
1722 | template<int size, bool big_endian> | |
1723 | void | |
1724 | Powerpc_relobj<size, big_endian>::scan_opd_relocs( | |
1725 | size_t reloc_count, | |
1726 | const unsigned char* prelocs, | |
1727 | const unsigned char* plocal_syms) | |
1728 | { | |
1729 | if (size == 64) | |
cf43a2fe | 1730 | { |
c9269dff AM |
1731 | typedef typename Reloc_types<elfcpp::SHT_RELA, size, big_endian>::Reloc |
1732 | Reltype; | |
1733 | const int reloc_size | |
1734 | = Reloc_types<elfcpp::SHT_RELA, size, big_endian>::reloc_size; | |
1735 | const int sym_size = elfcpp::Elf_sizes<size>::sym_size; | |
ec4dbad3 AM |
1736 | Address expected_off = 0; |
1737 | bool regular = true; | |
1738 | unsigned int opd_ent_size = 0; | |
c9269dff AM |
1739 | |
1740 | for (size_t i = 0; i < reloc_count; ++i, prelocs += reloc_size) | |
cf43a2fe | 1741 | { |
c9269dff AM |
1742 | Reltype reloc(prelocs); |
1743 | typename elfcpp::Elf_types<size>::Elf_WXword r_info | |
1744 | = reloc.get_r_info(); | |
1745 | unsigned int r_type = elfcpp::elf_r_type<size>(r_info); | |
1746 | if (r_type == elfcpp::R_PPC64_ADDR64) | |
1747 | { | |
1748 | unsigned int r_sym = elfcpp::elf_r_sym<size>(r_info); | |
1749 | typename elfcpp::Elf_types<size>::Elf_Addr value; | |
1750 | bool is_ordinary; | |
1751 | unsigned int shndx; | |
1752 | if (r_sym < this->local_symbol_count()) | |
1753 | { | |
1754 | typename elfcpp::Sym<size, big_endian> | |
1755 | lsym(plocal_syms + r_sym * sym_size); | |
1756 | shndx = lsym.get_st_shndx(); | |
1757 | shndx = this->adjust_sym_shndx(r_sym, shndx, &is_ordinary); | |
1758 | value = lsym.get_st_value(); | |
1759 | } | |
1760 | else | |
1761 | shndx = this->symbol_section_and_value(r_sym, &value, | |
1762 | &is_ordinary); | |
1763 | this->set_opd_ent(reloc.get_r_offset(), shndx, | |
1764 | value + reloc.get_r_addend()); | |
ec4dbad3 AM |
1765 | if (i == 2) |
1766 | { | |
1767 | expected_off = reloc.get_r_offset(); | |
1768 | opd_ent_size = expected_off; | |
1769 | } | |
1770 | else if (expected_off != reloc.get_r_offset()) | |
1771 | regular = false; | |
1772 | expected_off += opd_ent_size; | |
1773 | } | |
1774 | else if (r_type == elfcpp::R_PPC64_TOC) | |
1775 | { | |
1776 | if (expected_off - opd_ent_size + 8 != reloc.get_r_offset()) | |
1777 | regular = false; | |
1778 | } | |
1779 | else | |
1780 | { | |
1781 | gold_warning(_("%s: unexpected reloc type %u in .opd section"), | |
1782 | this->name().c_str(), r_type); | |
1783 | regular = false; | |
c9269dff AM |
1784 | } |
1785 | } | |
ec4dbad3 AM |
1786 | if (reloc_count <= 2) |
1787 | opd_ent_size = this->section_size(this->opd_shndx()); | |
1788 | if (opd_ent_size != 24 && opd_ent_size != 16) | |
1789 | regular = false; | |
1790 | if (!regular) | |
1791 | { | |
1792 | gold_warning(_("%s: .opd is not a regular array of opd entries"), | |
1793 | this->name().c_str()); | |
1794 | opd_ent_size = 0; | |
1795 | } | |
c9269dff AM |
1796 | } |
1797 | } | |
1798 | ||
1799 | template<int size, bool big_endian> | |
1800 | void | |
1801 | Powerpc_relobj<size, big_endian>::do_read_relocs(Read_relocs_data* rd) | |
1802 | { | |
1803 | Sized_relobj_file<size, big_endian>::do_read_relocs(rd); | |
1804 | if (size == 64) | |
1805 | { | |
1806 | for (Read_relocs_data::Relocs_list::iterator p = rd->relocs.begin(); | |
1807 | p != rd->relocs.end(); | |
1808 | ++p) | |
1809 | { | |
1810 | if (p->data_shndx == this->opd_shndx()) | |
1811 | { | |
ec4dbad3 AM |
1812 | uint64_t opd_size = this->section_size(this->opd_shndx()); |
1813 | gold_assert(opd_size == static_cast<size_t>(opd_size)); | |
1814 | if (opd_size != 0) | |
1815 | { | |
1816 | this->init_opd(opd_size); | |
1817 | this->scan_opd_relocs(p->reloc_count, p->contents->data(), | |
1818 | rd->local_symbols->data()); | |
1819 | } | |
c9269dff AM |
1820 | break; |
1821 | } | |
cf43a2fe AM |
1822 | } |
1823 | } | |
cf43a2fe AM |
1824 | } |
1825 | ||
b4f7960d AM |
1826 | // Read the symbols then set up st_other vector. |
1827 | ||
1828 | template<int size, bool big_endian> | |
1829 | void | |
1830 | Powerpc_relobj<size, big_endian>::do_read_symbols(Read_symbols_data* sd) | |
1831 | { | |
1832 | Sized_relobj_file<size, big_endian>::do_read_symbols(sd); | |
1833 | if (size == 64) | |
1834 | { | |
1835 | const int shdr_size = elfcpp::Elf_sizes<size>::shdr_size; | |
1836 | const unsigned char* const pshdrs = sd->section_headers->data(); | |
1837 | const unsigned int loccount = this->do_local_symbol_count(); | |
1838 | if (loccount != 0) | |
1839 | { | |
1840 | this->st_other_.resize(loccount); | |
1841 | const int sym_size = elfcpp::Elf_sizes<size>::sym_size; | |
1842 | off_t locsize = loccount * sym_size; | |
1843 | const unsigned int symtab_shndx = this->symtab_shndx(); | |
1844 | const unsigned char *psymtab = pshdrs + symtab_shndx * shdr_size; | |
1845 | typename elfcpp::Shdr<size, big_endian> shdr(psymtab); | |
1846 | const unsigned char* psyms = this->get_view(shdr.get_sh_offset(), | |
1847 | locsize, true, false); | |
1848 | psyms += sym_size; | |
1849 | for (unsigned int i = 1; i < loccount; ++i, psyms += sym_size) | |
1850 | { | |
1851 | elfcpp::Sym<size, big_endian> sym(psyms); | |
1852 | unsigned char st_other = sym.get_st_other(); | |
1853 | this->st_other_[i] = st_other; | |
1854 | if ((st_other & elfcpp::STO_PPC64_LOCAL_MASK) != 0) | |
1855 | { | |
1856 | if (this->abiversion() == 0) | |
1857 | this->set_abiversion(2); | |
1858 | else if (this->abiversion() < 2) | |
1859 | gold_error(_("%s: local symbol %d has invalid st_other" | |
1860 | " for ABI version 1"), | |
1861 | this->name().c_str(), i); | |
1862 | } | |
1863 | } | |
1864 | } | |
1865 | } | |
1866 | } | |
1867 | ||
1868 | template<int size, bool big_endian> | |
1869 | void | |
1870 | Powerpc_dynobj<size, big_endian>::set_abiversion(int ver) | |
1871 | { | |
1872 | this->e_flags_ |= ver; | |
1873 | if (this->abiversion() != 0) | |
1874 | { | |
1875 | Target_powerpc<size, big_endian>* target = | |
1876 | static_cast<Target_powerpc<size, big_endian>*>( | |
1877 | parameters->sized_target<size, big_endian>()); | |
1878 | if (target->abiversion() == 0) | |
1879 | target->set_abiversion(this->abiversion()); | |
1880 | else if (target->abiversion() != this->abiversion()) | |
1881 | gold_error(_("%s: ABI version %d is not compatible " | |
1882 | "with ABI version %d output"), | |
1883 | this->name().c_str(), | |
1884 | this->abiversion(), target->abiversion()); | |
1885 | ||
1886 | } | |
1887 | } | |
1888 | ||
dc3714f3 AM |
1889 | // Call Sized_dynobj::do_read_symbols to read the symbols then |
1890 | // read .opd from a dynamic object, filling in opd_ent_ vector, | |
1891 | ||
1892 | template<int size, bool big_endian> | |
1893 | void | |
1894 | Powerpc_dynobj<size, big_endian>::do_read_symbols(Read_symbols_data* sd) | |
1895 | { | |
1896 | Sized_dynobj<size, big_endian>::do_read_symbols(sd); | |
1897 | if (size == 64) | |
1898 | { | |
1899 | const int shdr_size = elfcpp::Elf_sizes<size>::shdr_size; | |
1900 | const unsigned char* const pshdrs = sd->section_headers->data(); | |
1901 | const unsigned char* namesu = sd->section_names->data(); | |
1902 | const char* names = reinterpret_cast<const char*>(namesu); | |
1903 | const unsigned char* s = NULL; | |
1904 | const unsigned char* opd; | |
1905 | section_size_type opd_size; | |
1906 | ||
1907 | // Find and read .opd section. | |
1908 | while (1) | |
1909 | { | |
1910 | s = this->template find_shdr<size, big_endian>(pshdrs, ".opd", names, | |
1911 | sd->section_names_size, | |
1912 | s); | |
1913 | if (s == NULL) | |
1914 | return; | |
1915 | ||
1916 | typename elfcpp::Shdr<size, big_endian> shdr(s); | |
1917 | if (shdr.get_sh_type() == elfcpp::SHT_PROGBITS | |
1918 | && (shdr.get_sh_flags() & elfcpp::SHF_ALLOC) != 0) | |
1919 | { | |
b4f7960d AM |
1920 | if (this->abiversion() == 0) |
1921 | this->set_abiversion(1); | |
1922 | else if (this->abiversion() > 1) | |
1923 | gold_error(_("%s: .opd invalid in abiv%d"), | |
1924 | this->name().c_str(), this->abiversion()); | |
1925 | ||
dc3714f3 AM |
1926 | this->opd_shndx_ = (s - pshdrs) / shdr_size; |
1927 | this->opd_address_ = shdr.get_sh_addr(); | |
1928 | opd_size = convert_to_section_size_type(shdr.get_sh_size()); | |
1929 | opd = this->get_view(shdr.get_sh_offset(), opd_size, | |
1930 | true, false); | |
1931 | break; | |
1932 | } | |
1933 | } | |
1934 | ||
1935 | // Build set of executable sections. | |
1936 | // Using a set is probably overkill. There is likely to be only | |
1937 | // a few executable sections, typically .init, .text and .fini, | |
1938 | // and they are generally grouped together. | |
1939 | typedef std::set<Sec_info> Exec_sections; | |
1940 | Exec_sections exec_sections; | |
1941 | s = pshdrs; | |
1942 | for (unsigned int i = 1; i < this->shnum(); ++i, s += shdr_size) | |
1943 | { | |
1944 | typename elfcpp::Shdr<size, big_endian> shdr(s); | |
1945 | if (shdr.get_sh_type() == elfcpp::SHT_PROGBITS | |
1946 | && ((shdr.get_sh_flags() | |
1947 | & (elfcpp::SHF_ALLOC | elfcpp::SHF_EXECINSTR)) | |
1948 | == (elfcpp::SHF_ALLOC | elfcpp::SHF_EXECINSTR)) | |
1949 | && shdr.get_sh_size() != 0) | |
1950 | { | |
1951 | exec_sections.insert(Sec_info(shdr.get_sh_addr(), | |
1952 | shdr.get_sh_size(), i)); | |
1953 | } | |
1954 | } | |
1955 | if (exec_sections.empty()) | |
1956 | return; | |
1957 | ||
1958 | // Look over the OPD entries. This is complicated by the fact | |
1959 | // that some binaries will use two-word entries while others | |
1960 | // will use the standard three-word entries. In most cases | |
1961 | // the third word (the environment pointer for languages like | |
1962 | // Pascal) is unused and will be zero. If the third word is | |
1963 | // used it should not be pointing into executable sections, | |
1964 | // I think. | |
1965 | this->init_opd(opd_size); | |
1966 | for (const unsigned char* p = opd; p < opd + opd_size; p += 8) | |
1967 | { | |
1968 | typedef typename elfcpp::Swap<64, big_endian>::Valtype Valtype; | |
1969 | const Valtype* valp = reinterpret_cast<const Valtype*>(p); | |
1970 | Valtype val = elfcpp::Swap<64, big_endian>::readval(valp); | |
1971 | if (val == 0) | |
1972 | // Chances are that this is the third word of an OPD entry. | |
1973 | continue; | |
1974 | typename Exec_sections::const_iterator e | |
1975 | = exec_sections.upper_bound(Sec_info(val, 0, 0)); | |
1976 | if (e != exec_sections.begin()) | |
1977 | { | |
1978 | --e; | |
1979 | if (e->start <= val && val < e->start + e->len) | |
1980 | { | |
1981 | // We have an address in an executable section. | |
1982 | // VAL ought to be the function entry, set it up. | |
1983 | this->set_opd_ent(p - opd, e->shndx, val); | |
1984 | // Skip second word of OPD entry, the TOC pointer. | |
1985 | p += 8; | |
1986 | } | |
1987 | } | |
1988 | // If we didn't match any executable sections, we likely | |
1989 | // have a non-zero third word in the OPD entry. | |
1990 | } | |
1991 | } | |
1992 | } | |
1993 | ||
f43ba157 | 1994 | // Set up some symbols. |
26a4e9cb AM |
1995 | |
1996 | template<int size, bool big_endian> | |
1997 | void | |
f43ba157 AM |
1998 | Target_powerpc<size, big_endian>::do_define_standard_symbols( |
1999 | Symbol_table* symtab, | |
2000 | Layout* layout) | |
26a4e9cb AM |
2001 | { |
2002 | if (size == 32) | |
2003 | { | |
bb66a627 AM |
2004 | // Define _GLOBAL_OFFSET_TABLE_ to ensure it isn't seen as |
2005 | // undefined when scanning relocs (and thus requires | |
26a4e9cb AM |
2006 | // non-relative dynamic relocs). The proper value will be |
2007 | // updated later. | |
2008 | Symbol *gotsym = symtab->lookup("_GLOBAL_OFFSET_TABLE_", NULL); | |
2009 | if (gotsym != NULL && gotsym->is_undefined()) | |
2010 | { | |
2011 | Target_powerpc<size, big_endian>* target = | |
2012 | static_cast<Target_powerpc<size, big_endian>*>( | |
2013 | parameters->sized_target<size, big_endian>()); | |
2014 | Output_data_got_powerpc<size, big_endian>* got | |
2015 | = target->got_section(symtab, layout); | |
2016 | symtab->define_in_output_data("_GLOBAL_OFFSET_TABLE_", NULL, | |
2017 | Symbol_table::PREDEFINED, | |
2018 | got, 0, 0, | |
2019 | elfcpp::STT_OBJECT, | |
bb66a627 | 2020 | elfcpp::STB_LOCAL, |
26a4e9cb AM |
2021 | elfcpp::STV_HIDDEN, 0, |
2022 | false, false); | |
2023 | } | |
2024 | ||
2025 | // Define _SDA_BASE_ at the start of the .sdata section + 32768. | |
2026 | Symbol *sdasym = symtab->lookup("_SDA_BASE_", NULL); | |
2027 | if (sdasym != NULL && sdasym->is_undefined()) | |
2028 | { | |
2029 | Output_data_space* sdata = new Output_data_space(4, "** sdata"); | |
2030 | Output_section* os | |
2031 | = layout->add_output_section_data(".sdata", 0, | |
2032 | elfcpp::SHF_ALLOC | |
2033 | | elfcpp::SHF_WRITE, | |
2034 | sdata, ORDER_SMALL_DATA, false); | |
2035 | symtab->define_in_output_data("_SDA_BASE_", NULL, | |
2036 | Symbol_table::PREDEFINED, | |
2037 | os, 32768, 0, elfcpp::STT_OBJECT, | |
2038 | elfcpp::STB_LOCAL, elfcpp::STV_HIDDEN, | |
2039 | 0, false, false); | |
2040 | } | |
2041 | } | |
b4f7960d AM |
2042 | else |
2043 | { | |
2044 | // Define .TOC. as for 32-bit _GLOBAL_OFFSET_TABLE_ | |
2045 | Symbol *gotsym = symtab->lookup(".TOC.", NULL); | |
2046 | if (gotsym != NULL && gotsym->is_undefined()) | |
2047 | { | |
2048 | Target_powerpc<size, big_endian>* target = | |
2049 | static_cast<Target_powerpc<size, big_endian>*>( | |
2050 | parameters->sized_target<size, big_endian>()); | |
2051 | Output_data_got_powerpc<size, big_endian>* got | |
2052 | = target->got_section(symtab, layout); | |
2053 | symtab->define_in_output_data(".TOC.", NULL, | |
2054 | Symbol_table::PREDEFINED, | |
2055 | got, 0x8000, 0, | |
2056 | elfcpp::STT_OBJECT, | |
2057 | elfcpp::STB_LOCAL, | |
2058 | elfcpp::STV_HIDDEN, 0, | |
2059 | false, false); | |
2060 | } | |
2061 | } | |
26a4e9cb AM |
2062 | } |
2063 | ||
cf43a2fe AM |
2064 | // Set up PowerPC target specific relobj. |
2065 | ||
2066 | template<int size, bool big_endian> | |
2067 | Object* | |
2068 | Target_powerpc<size, big_endian>::do_make_elf_object( | |
2069 | const std::string& name, | |
2070 | Input_file* input_file, | |
2071 | off_t offset, const elfcpp::Ehdr<size, big_endian>& ehdr) | |
2072 | { | |
2073 | int et = ehdr.get_e_type(); | |
957564c9 AS |
2074 | // ET_EXEC files are valid input for --just-symbols/-R, |
2075 | // and we treat them as relocatable objects. | |
2076 | if (et == elfcpp::ET_REL | |
2077 | || (et == elfcpp::ET_EXEC && input_file->just_symbols())) | |
cf43a2fe AM |
2078 | { |
2079 | Powerpc_relobj<size, big_endian>* obj = | |
c9269dff | 2080 | new Powerpc_relobj<size, big_endian>(name, input_file, offset, ehdr); |
cf43a2fe AM |
2081 | obj->setup(); |
2082 | return obj; | |
2083 | } | |
2084 | else if (et == elfcpp::ET_DYN) | |
2085 | { | |
dc3714f3 AM |
2086 | Powerpc_dynobj<size, big_endian>* obj = |
2087 | new Powerpc_dynobj<size, big_endian>(name, input_file, offset, ehdr); | |
cf43a2fe AM |
2088 | obj->setup(); |
2089 | return obj; | |
2090 | } | |
2091 | else | |
2092 | { | |
c9269dff | 2093 | gold_error(_("%s: unsupported ELF file type %d"), name.c_str(), et); |
cf43a2fe AM |
2094 | return NULL; |
2095 | } | |
2096 | } | |
2097 | ||
2098 | template<int size, bool big_endian> | |
2099 | class Output_data_got_powerpc : public Output_data_got<size, big_endian> | |
2100 | { | |
2101 | public: | |
2102 | typedef typename elfcpp::Elf_types<size>::Elf_Addr Valtype; | |
2103 | typedef Output_data_reloc<elfcpp::SHT_RELA, true, size, big_endian> Rela_dyn; | |
2104 | ||
2105 | Output_data_got_powerpc(Symbol_table* symtab, Layout* layout) | |
2106 | : Output_data_got<size, big_endian>(), | |
2107 | symtab_(symtab), layout_(layout), | |
2108 | header_ent_cnt_(size == 32 ? 3 : 1), | |
2109 | header_index_(size == 32 ? 0x2000 : 0) | |
9e69ed50 | 2110 | { } |
cf43a2fe | 2111 | |
e84fe78f AM |
2112 | // Override all the Output_data_got methods we use so as to first call |
2113 | // reserve_ent(). | |
2114 | bool | |
2115 | add_global(Symbol* gsym, unsigned int got_type) | |
2116 | { | |
2117 | this->reserve_ent(); | |
2118 | return Output_data_got<size, big_endian>::add_global(gsym, got_type); | |
2119 | } | |
2120 | ||
2121 | bool | |
2122 | add_global_plt(Symbol* gsym, unsigned int got_type) | |
2123 | { | |
2124 | this->reserve_ent(); | |
2125 | return Output_data_got<size, big_endian>::add_global_plt(gsym, got_type); | |
2126 | } | |
2127 | ||
2128 | bool | |
2129 | add_global_tls(Symbol* gsym, unsigned int got_type) | |
2130 | { return this->add_global_plt(gsym, got_type); } | |
2131 | ||
2132 | void | |
2133 | add_global_with_rel(Symbol* gsym, unsigned int got_type, | |
2134 | Output_data_reloc_generic* rel_dyn, unsigned int r_type) | |
2135 | { | |
2136 | this->reserve_ent(); | |
2137 | Output_data_got<size, big_endian>:: | |
2138 | add_global_with_rel(gsym, got_type, rel_dyn, r_type); | |
2139 | } | |
2140 | ||
2141 | void | |
2142 | add_global_pair_with_rel(Symbol* gsym, unsigned int got_type, | |
2143 | Output_data_reloc_generic* rel_dyn, | |
2144 | unsigned int r_type_1, unsigned int r_type_2) | |
2145 | { | |
2146 | this->reserve_ent(2); | |
2147 | Output_data_got<size, big_endian>:: | |
2148 | add_global_pair_with_rel(gsym, got_type, rel_dyn, r_type_1, r_type_2); | |
2149 | } | |
2150 | ||
2151 | bool | |
2152 | add_local(Relobj* object, unsigned int sym_index, unsigned int got_type) | |
2153 | { | |
2154 | this->reserve_ent(); | |
2155 | return Output_data_got<size, big_endian>::add_local(object, sym_index, | |
2156 | got_type); | |
2157 | } | |
2158 | ||
2159 | bool | |
2160 | add_local_plt(Relobj* object, unsigned int sym_index, unsigned int got_type) | |
2161 | { | |
2162 | this->reserve_ent(); | |
2163 | return Output_data_got<size, big_endian>::add_local_plt(object, sym_index, | |
2164 | got_type); | |
2165 | } | |
2166 | ||
2167 | bool | |
2168 | add_local_tls(Relobj* object, unsigned int sym_index, unsigned int got_type) | |
2169 | { return this->add_local_plt(object, sym_index, got_type); } | |
2170 | ||
2171 | void | |
2172 | add_local_tls_pair(Relobj* object, unsigned int sym_index, | |
2173 | unsigned int got_type, | |
2174 | Output_data_reloc_generic* rel_dyn, | |
2175 | unsigned int r_type) | |
2176 | { | |
2177 | this->reserve_ent(2); | |
2178 | Output_data_got<size, big_endian>:: | |
2179 | add_local_tls_pair(object, sym_index, got_type, rel_dyn, r_type); | |
2180 | } | |
2181 | ||
2182 | unsigned int | |
2183 | add_constant(Valtype constant) | |
2184 | { | |
2185 | this->reserve_ent(); | |
2186 | return Output_data_got<size, big_endian>::add_constant(constant); | |
2187 | } | |
2188 | ||
dd93cd0a AM |
2189 | unsigned int |
2190 | add_constant_pair(Valtype c1, Valtype c2) | |
2191 | { | |
2192 | this->reserve_ent(2); | |
e84fe78f | 2193 | return Output_data_got<size, big_endian>::add_constant_pair(c1, c2); |
dd93cd0a AM |
2194 | } |
2195 | ||
2196 | // Offset of _GLOBAL_OFFSET_TABLE_. | |
cf43a2fe AM |
2197 | unsigned int |
2198 | g_o_t() const | |
2199 | { | |
2200 | return this->got_offset(this->header_index_); | |
42cacb20 | 2201 | } |
cf43a2fe | 2202 | |
dd93cd0a AM |
2203 | // Offset of base used to access the GOT/TOC. |
2204 | // The got/toc pointer reg will be set to this value. | |
26a4e9cb | 2205 | Valtype |
dd93cd0a AM |
2206 | got_base_offset(const Powerpc_relobj<size, big_endian>* object) const |
2207 | { | |
2208 | if (size == 32) | |
2209 | return this->g_o_t(); | |
2210 | else | |
2211 | return (this->output_section()->address() | |
2212 | + object->toc_base_offset() | |
2213 | - this->address()); | |
2214 | } | |
2215 | ||
cf43a2fe AM |
2216 | // Ensure our GOT has a header. |
2217 | void | |
2218 | set_final_data_size() | |
2219 | { | |
2220 | if (this->header_ent_cnt_ != 0) | |
2221 | this->make_header(); | |
2222 | Output_data_got<size, big_endian>::set_final_data_size(); | |
2223 | } | |
2224 | ||
2225 | // First word of GOT header needs some values that are not | |
2226 | // handled by Output_data_got so poke them in here. | |
2227 | // For 32-bit, address of .dynamic, for 64-bit, address of TOCbase. | |
2228 | void | |
2229 | do_write(Output_file* of) | |
2230 | { | |
c9824451 AM |
2231 | Valtype val = 0; |
2232 | if (size == 32 && this->layout_->dynamic_data() != NULL) | |
2233 | val = this->layout_->dynamic_section()->address(); | |
2234 | if (size == 64) | |
2235 | val = this->output_section()->address() + 0x8000; | |
2236 | this->replace_constant(this->header_index_, val); | |
cf43a2fe AM |
2237 | Output_data_got<size, big_endian>::do_write(of); |
2238 | } | |
2239 | ||
2240 | private: | |
2241 | void | |
2242 | reserve_ent(unsigned int cnt = 1) | |
2243 | { | |
2244 | if (this->header_ent_cnt_ == 0) | |
2245 | return; | |
2246 | if (this->num_entries() + cnt > this->header_index_) | |
2247 | this->make_header(); | |
2248 | } | |
2249 | ||
2250 | void | |
2251 | make_header() | |
2252 | { | |
2253 | this->header_ent_cnt_ = 0; | |
2254 | this->header_index_ = this->num_entries(); | |
2255 | if (size == 32) | |
2256 | { | |
2257 | Output_data_got<size, big_endian>::add_constant(0); | |
2258 | Output_data_got<size, big_endian>::add_constant(0); | |
2259 | Output_data_got<size, big_endian>::add_constant(0); | |
2260 | ||
2261 | // Define _GLOBAL_OFFSET_TABLE_ at the header | |
bb66a627 AM |
2262 | Symbol *gotsym = this->symtab_->lookup("_GLOBAL_OFFSET_TABLE_", NULL); |
2263 | if (gotsym != NULL) | |
2264 | { | |
2265 | Sized_symbol<size>* sym = static_cast<Sized_symbol<size>*>(gotsym); | |
2266 | sym->set_value(this->g_o_t()); | |
2267 | } | |
2268 | else | |
2269 | this->symtab_->define_in_output_data("_GLOBAL_OFFSET_TABLE_", NULL, | |
2270 | Symbol_table::PREDEFINED, | |
2271 | this, this->g_o_t(), 0, | |
2272 | elfcpp::STT_OBJECT, | |
2273 | elfcpp::STB_LOCAL, | |
2274 | elfcpp::STV_HIDDEN, 0, | |
2275 | false, false); | |
cf43a2fe AM |
2276 | } |
2277 | else | |
2278 | Output_data_got<size, big_endian>::add_constant(0); | |
2279 | } | |
2280 | ||
2281 | // Stashed pointers. | |
2282 | Symbol_table* symtab_; | |
2283 | Layout* layout_; | |
2284 | ||
2285 | // GOT header size. | |
2286 | unsigned int header_ent_cnt_; | |
2287 | // GOT header index. | |
2288 | unsigned int header_index_; | |
42cacb20 DE |
2289 | }; |
2290 | ||
2291 | // Get the GOT section, creating it if necessary. | |
2292 | ||
2293 | template<int size, bool big_endian> | |
cf43a2fe | 2294 | Output_data_got_powerpc<size, big_endian>* |
42cacb20 DE |
2295 | Target_powerpc<size, big_endian>::got_section(Symbol_table* symtab, |
2296 | Layout* layout) | |
2297 | { | |
2298 | if (this->got_ == NULL) | |
2299 | { | |
2300 | gold_assert(symtab != NULL && layout != NULL); | |
2301 | ||
cf43a2fe AM |
2302 | this->got_ |
2303 | = new Output_data_got_powerpc<size, big_endian>(symtab, layout); | |
42cacb20 DE |
2304 | |
2305 | layout->add_output_section_data(".got", elfcpp::SHT_PROGBITS, | |
2306 | elfcpp::SHF_ALLOC | elfcpp::SHF_WRITE, | |
22f0da72 | 2307 | this->got_, ORDER_DATA, false); |
42cacb20 DE |
2308 | } |
2309 | ||
2310 | return this->got_; | |
2311 | } | |
2312 | ||
2313 | // Get the dynamic reloc section, creating it if necessary. | |
2314 | ||
2315 | template<int size, bool big_endian> | |
2316 | typename Target_powerpc<size, big_endian>::Reloc_section* | |
2317 | Target_powerpc<size, big_endian>::rela_dyn_section(Layout* layout) | |
2318 | { | |
2319 | if (this->rela_dyn_ == NULL) | |
2320 | { | |
2321 | gold_assert(layout != NULL); | |
2322 | this->rela_dyn_ = new Reloc_section(parameters->options().combreloc()); | |
2323 | layout->add_output_section_data(".rela.dyn", elfcpp::SHT_RELA, | |
22f0da72 ILT |
2324 | elfcpp::SHF_ALLOC, this->rela_dyn_, |
2325 | ORDER_DYNAMIC_RELOCS, false); | |
42cacb20 DE |
2326 | } |
2327 | return this->rela_dyn_; | |
2328 | } | |
2329 | ||
b3ccdeb5 AM |
2330 | // Similarly, but for ifunc symbols get the one for ifunc. |
2331 | ||
2332 | template<int size, bool big_endian> | |
2333 | typename Target_powerpc<size, big_endian>::Reloc_section* | |
2334 | Target_powerpc<size, big_endian>::rela_dyn_section(Symbol_table* symtab, | |
2335 | Layout* layout, | |
2336 | bool for_ifunc) | |
2337 | { | |
2338 | if (!for_ifunc) | |
2339 | return this->rela_dyn_section(layout); | |
2340 | ||
2341 | if (this->iplt_ == NULL) | |
2342 | this->make_iplt_section(symtab, layout); | |
2343 | return this->iplt_->rel_plt(); | |
2344 | } | |
2345 | ||
ec661b9d AM |
2346 | class Stub_control |
2347 | { | |
2348 | public: | |
2349 | // Determine the stub group size. The group size is the absolute | |
2350 | // value of the parameter --stub-group-size. If --stub-group-size | |
2351 | // is passed a negative value, we restrict stubs to be always before | |
2352 | // the stubbed branches. | |
2353 | Stub_control(int32_t size) | |
2354 | : state_(NO_GROUP), stub_group_size_(abs(size)), | |
2355 | stub14_group_size_(abs(size)), | |
2356 | stubs_always_before_branch_(size < 0), suppress_size_errors_(false), | |
2357 | group_end_addr_(0), owner_(NULL), output_section_(NULL) | |
2358 | { | |
2359 | if (stub_group_size_ == 1) | |
2360 | { | |
2361 | // Default values. | |
2362 | if (stubs_always_before_branch_) | |
2363 | { | |
2364 | stub_group_size_ = 0x1e00000; | |
2365 | stub14_group_size_ = 0x7800; | |
2366 | } | |
2367 | else | |
2368 | { | |
2369 | stub_group_size_ = 0x1c00000; | |
2370 | stub14_group_size_ = 0x7000; | |
2371 | } | |
2372 | suppress_size_errors_ = true; | |
2373 | } | |
2374 | } | |
2375 | ||
2376 | // Return true iff input section can be handled by current stub | |
2377 | // group. | |
2378 | bool | |
2379 | can_add_to_stub_group(Output_section* o, | |
2380 | const Output_section::Input_section* i, | |
2381 | bool has14); | |
2382 | ||
2383 | const Output_section::Input_section* | |
2384 | owner() | |
2385 | { return owner_; } | |
2386 | ||
2387 | Output_section* | |
2388 | output_section() | |
2389 | { return output_section_; } | |
2390 | ||
2391 | private: | |
2392 | typedef enum | |
2393 | { | |
2394 | NO_GROUP, | |
2395 | FINDING_STUB_SECTION, | |
2396 | HAS_STUB_SECTION | |
2397 | } State; | |
2398 | ||
2399 | State state_; | |
2400 | uint32_t stub_group_size_; | |
2401 | uint32_t stub14_group_size_; | |
2402 | bool stubs_always_before_branch_; | |
2403 | bool suppress_size_errors_; | |
2404 | uint64_t group_end_addr_; | |
2405 | const Output_section::Input_section* owner_; | |
2406 | Output_section* output_section_; | |
2407 | }; | |
2408 | ||
0cfdc767 | 2409 | // Return true iff input section can be handled by current stub |
ec661b9d AM |
2410 | // group. |
2411 | ||
2412 | bool | |
2413 | Stub_control::can_add_to_stub_group(Output_section* o, | |
2414 | const Output_section::Input_section* i, | |
2415 | bool has14) | |
2416 | { | |
2417 | uint32_t group_size | |
2418 | = has14 ? this->stub14_group_size_ : this->stub_group_size_; | |
2419 | bool whole_sec = o->order() == ORDER_INIT || o->order() == ORDER_FINI; | |
2420 | uint64_t this_size; | |
2421 | uint64_t start_addr = o->address(); | |
2422 | ||
2423 | if (whole_sec) | |
2424 | // .init and .fini sections are pasted together to form a single | |
2425 | // function. We can't be adding stubs in the middle of the function. | |
2426 | this_size = o->data_size(); | |
2427 | else | |
2428 | { | |
2429 | start_addr += i->relobj()->output_section_offset(i->shndx()); | |
2430 | this_size = i->data_size(); | |
2431 | } | |
2432 | uint64_t end_addr = start_addr + this_size; | |
2433 | bool toobig = this_size > group_size; | |
2434 | ||
2435 | if (toobig && !this->suppress_size_errors_) | |
2436 | gold_warning(_("%s:%s exceeds group size"), | |
2437 | i->relobj()->name().c_str(), | |
2438 | i->relobj()->section_name(i->shndx()).c_str()); | |
2439 | ||
2440 | if (this->state_ != HAS_STUB_SECTION | |
0cfdc767 AM |
2441 | && (!whole_sec || this->output_section_ != o) |
2442 | && (this->state_ == NO_GROUP | |
2443 | || this->group_end_addr_ - end_addr < group_size)) | |
ec661b9d AM |
2444 | { |
2445 | this->owner_ = i; | |
2446 | this->output_section_ = o; | |
2447 | } | |
2448 | ||
2449 | if (this->state_ == NO_GROUP) | |
2450 | { | |
2451 | this->state_ = FINDING_STUB_SECTION; | |
2452 | this->group_end_addr_ = end_addr; | |
2453 | } | |
2454 | else if (this->group_end_addr_ - start_addr < group_size) | |
2455 | ; | |
2456 | // Adding this section would make the group larger than GROUP_SIZE. | |
2457 | else if (this->state_ == FINDING_STUB_SECTION | |
2458 | && !this->stubs_always_before_branch_ | |
2459 | && !toobig) | |
2460 | { | |
2461 | // But wait, there's more! Input sections up to GROUP_SIZE | |
2462 | // bytes before the stub table can be handled by it too. | |
2463 | this->state_ = HAS_STUB_SECTION; | |
2464 | this->group_end_addr_ = end_addr; | |
2465 | } | |
2466 | else | |
2467 | { | |
2468 | this->state_ = NO_GROUP; | |
2469 | return false; | |
2470 | } | |
2471 | return true; | |
2472 | } | |
2473 | ||
2474 | // Look over all the input sections, deciding where to place stubs. | |
2475 | ||
2476 | template<int size, bool big_endian> | |
2477 | void | |
2478 | Target_powerpc<size, big_endian>::group_sections(Layout* layout, | |
2479 | const Task*) | |
2480 | { | |
2481 | Stub_control stub_control(parameters->options().stub_group_size()); | |
2482 | ||
2483 | // Group input sections and insert stub table | |
2484 | Stub_table<size, big_endian>* stub_table = NULL; | |
2485 | Layout::Section_list section_list; | |
2486 | layout->get_executable_sections(§ion_list); | |
2487 | std::stable_sort(section_list.begin(), section_list.end(), Sort_sections()); | |
2488 | for (Layout::Section_list::reverse_iterator o = section_list.rbegin(); | |
2489 | o != section_list.rend(); | |
2490 | ++o) | |
2491 | { | |
2492 | typedef Output_section::Input_section_list Input_section_list; | |
2493 | for (Input_section_list::const_reverse_iterator i | |
2494 | = (*o)->input_sections().rbegin(); | |
2495 | i != (*o)->input_sections().rend(); | |
2496 | ++i) | |
2497 | { | |
2498 | if (i->is_input_section()) | |
2499 | { | |
2500 | Powerpc_relobj<size, big_endian>* ppcobj = static_cast | |
2501 | <Powerpc_relobj<size, big_endian>*>(i->relobj()); | |
2502 | bool has14 = ppcobj->has_14bit_branch(i->shndx()); | |
2503 | if (!stub_control.can_add_to_stub_group(*o, &*i, has14)) | |
2504 | { | |
2505 | stub_table->init(stub_control.owner(), | |
2506 | stub_control.output_section()); | |
2507 | stub_table = NULL; | |
2508 | } | |
2509 | if (stub_table == NULL) | |
2510 | stub_table = this->new_stub_table(); | |
2511 | ppcobj->set_stub_table(i->shndx(), stub_table); | |
2512 | } | |
2513 | } | |
2514 | } | |
2515 | if (stub_table != NULL) | |
0cfdc767 AM |
2516 | { |
2517 | const Output_section::Input_section* i = stub_control.owner(); | |
2518 | if (!i->is_input_section()) | |
2519 | { | |
2520 | // Corner case. A new stub group was made for the first | |
2521 | // section (last one looked at here) for some reason, but | |
2522 | // the first section is already being used as the owner for | |
2523 | // a stub table for following sections. Force it into that | |
2524 | // stub group. | |
2525 | gold_assert(this->stub_tables_.size() >= 2); | |
2526 | this->stub_tables_.pop_back(); | |
2527 | delete stub_table; | |
2528 | Powerpc_relobj<size, big_endian>* ppcobj = static_cast | |
2529 | <Powerpc_relobj<size, big_endian>*>(i->relobj()); | |
2530 | ppcobj->set_stub_table(i->shndx(), this->stub_tables_.back()); | |
2531 | } | |
2532 | else | |
2533 | stub_table->init(i, stub_control.output_section()); | |
2534 | } | |
ec661b9d AM |
2535 | } |
2536 | ||
2537 | // If this branch needs a plt call stub, or a long branch stub, make one. | |
2538 | ||
2539 | template<int size, bool big_endian> | |
2540 | void | |
2541 | Target_powerpc<size, big_endian>::Branch_info::make_stub( | |
2542 | Stub_table<size, big_endian>* stub_table, | |
2543 | Stub_table<size, big_endian>* ifunc_stub_table, | |
2544 | Symbol_table* symtab) const | |
2545 | { | |
2546 | Symbol* sym = this->object_->global_symbol(this->r_sym_); | |
2547 | if (sym != NULL && sym->is_forwarder()) | |
2548 | sym = symtab->resolve_forwards(sym); | |
2549 | const Sized_symbol<size>* gsym = static_cast<const Sized_symbol<size>*>(sym); | |
88b8e639 AM |
2550 | Target_powerpc<size, big_endian>* target = |
2551 | static_cast<Target_powerpc<size, big_endian>*>( | |
2552 | parameters->sized_target<size, big_endian>()); | |
ec661b9d | 2553 | if (gsym != NULL |
88b8e639 | 2554 | ? gsym->use_plt_offset(Scan::get_reference_flags(this->r_type_, target)) |
ec661b9d AM |
2555 | : this->object_->local_has_plt_offset(this->r_sym_)) |
2556 | { | |
9055360d AM |
2557 | if (size == 64 |
2558 | && gsym != NULL | |
2559 | && target->abiversion() >= 2 | |
2560 | && !parameters->options().output_is_position_independent() | |
2561 | && !is_branch_reloc(this->r_type_)) | |
2562 | target->glink_section()->add_global_entry(gsym); | |
2563 | else | |
ec661b9d | 2564 | { |
9055360d AM |
2565 | if (stub_table == NULL) |
2566 | stub_table = this->object_->stub_table(this->shndx_); | |
2567 | if (stub_table == NULL) | |
2568 | { | |
2569 | // This is a ref from a data section to an ifunc symbol. | |
2570 | stub_table = ifunc_stub_table; | |
2571 | } | |
2572 | gold_assert(stub_table != NULL); | |
2573 | if (gsym != NULL) | |
2574 | stub_table->add_plt_call_entry(this->object_, gsym, | |
2575 | this->r_type_, this->addend_); | |
2576 | else | |
2577 | stub_table->add_plt_call_entry(this->object_, this->r_sym_, | |
2578 | this->r_type_, this->addend_); | |
ec661b9d | 2579 | } |
ec661b9d AM |
2580 | } |
2581 | else | |
2582 | { | |
b4f7960d | 2583 | unsigned long max_branch_offset; |
ec661b9d AM |
2584 | if (this->r_type_ == elfcpp::R_POWERPC_REL14 |
2585 | || this->r_type_ == elfcpp::R_POWERPC_REL14_BRTAKEN | |
2586 | || this->r_type_ == elfcpp::R_POWERPC_REL14_BRNTAKEN) | |
2587 | max_branch_offset = 1 << 15; | |
2588 | else if (this->r_type_ == elfcpp::R_POWERPC_REL24 | |
2589 | || this->r_type_ == elfcpp::R_PPC_PLTREL24 | |
2590 | || this->r_type_ == elfcpp::R_PPC_LOCAL24PC) | |
2591 | max_branch_offset = 1 << 25; | |
2592 | else | |
2593 | return; | |
2594 | Address from = this->object_->get_output_section_offset(this->shndx_); | |
2595 | gold_assert(from != invalid_address); | |
2596 | from += (this->object_->output_section(this->shndx_)->address() | |
2597 | + this->offset_); | |
2598 | Address to; | |
2599 | if (gsym != NULL) | |
2600 | { | |
2601 | switch (gsym->source()) | |
2602 | { | |
2603 | case Symbol::FROM_OBJECT: | |
2604 | { | |
2605 | Object* symobj = gsym->object(); | |
2606 | if (symobj->is_dynamic() | |
2607 | || symobj->pluginobj() != NULL) | |
2608 | return; | |
2609 | bool is_ordinary; | |
2610 | unsigned int shndx = gsym->shndx(&is_ordinary); | |
2611 | if (shndx == elfcpp::SHN_UNDEF) | |
2612 | return; | |
2613 | } | |
2614 | break; | |
2615 | ||
2616 | case Symbol::IS_UNDEFINED: | |
2617 | return; | |
2618 | ||
2619 | default: | |
2620 | break; | |
2621 | } | |
2622 | Symbol_table::Compute_final_value_status status; | |
2623 | to = symtab->compute_final_value<size>(gsym, &status); | |
2624 | if (status != Symbol_table::CFVS_OK) | |
2625 | return; | |
9055360d AM |
2626 | if (size == 64) |
2627 | to += this->object_->ppc64_local_entry_offset(gsym); | |
ec661b9d AM |
2628 | } |
2629 | else | |
2630 | { | |
2631 | const Symbol_value<size>* psymval | |
2632 | = this->object_->local_symbol(this->r_sym_); | |
2633 | Symbol_value<size> symval; | |
2634 | typedef Sized_relobj_file<size, big_endian> ObjType; | |
2635 | typename ObjType::Compute_final_local_value_status status | |
2636 | = this->object_->compute_final_local_value(this->r_sym_, psymval, | |
2637 | &symval, symtab); | |
2638 | if (status != ObjType::CFLV_OK | |
2639 | || !symval.has_output_value()) | |
2640 | return; | |
2641 | to = symval.value(this->object_, 0); | |
9055360d AM |
2642 | if (size == 64) |
2643 | to += this->object_->ppc64_local_entry_offset(this->r_sym_); | |
ec661b9d | 2644 | } |
906b9150 | 2645 | to += this->addend_; |
ec661b9d AM |
2646 | if (stub_table == NULL) |
2647 | stub_table = this->object_->stub_table(this->shndx_); | |
9055360d | 2648 | if (size == 64 && target->abiversion() < 2) |
ec661b9d AM |
2649 | { |
2650 | unsigned int dest_shndx; | |
0cfdc767 AM |
2651 | to = target->symval_for_branch(symtab, to, gsym, |
2652 | this->object_, &dest_shndx); | |
ec661b9d AM |
2653 | } |
2654 | Address delta = to - from; | |
2655 | if (delta + max_branch_offset >= 2 * max_branch_offset) | |
2656 | { | |
0cfdc767 AM |
2657 | if (stub_table == NULL) |
2658 | { | |
2659 | gold_warning(_("%s:%s: branch in non-executable section," | |
2660 | " no long branch stub for you"), | |
2661 | this->object_->name().c_str(), | |
2662 | this->object_->section_name(this->shndx_).c_str()); | |
2663 | return; | |
2664 | } | |
ec661b9d AM |
2665 | stub_table->add_long_branch_entry(this->object_, to); |
2666 | } | |
2667 | } | |
2668 | } | |
2669 | ||
2670 | // Relaxation hook. This is where we do stub generation. | |
2671 | ||
2672 | template<int size, bool big_endian> | |
2673 | bool | |
2674 | Target_powerpc<size, big_endian>::do_relax(int pass, | |
2675 | const Input_objects*, | |
2676 | Symbol_table* symtab, | |
2677 | Layout* layout, | |
2678 | const Task* task) | |
2679 | { | |
2680 | unsigned int prev_brlt_size = 0; | |
2681 | if (pass == 1) | |
ec661b9d | 2682 | { |
b4f7960d AM |
2683 | bool thread_safe |
2684 | = this->abiversion() < 2 && parameters->options().plt_thread_safe(); | |
2685 | if (size == 64 | |
2686 | && this->abiversion() < 2 | |
2687 | && !thread_safe | |
2688 | && !parameters->options().user_set_plt_thread_safe()) | |
ec661b9d | 2689 | { |
e2458743 | 2690 | static const char* const thread_starter[] = |
9e69ed50 AM |
2691 | { |
2692 | "pthread_create", | |
2693 | /* libstdc++ */ | |
2694 | "_ZNSt6thread15_M_start_threadESt10shared_ptrINS_10_Impl_baseEE", | |
2695 | /* librt */ | |
2696 | "aio_init", "aio_read", "aio_write", "aio_fsync", "lio_listio", | |
2697 | "mq_notify", "create_timer", | |
2698 | /* libanl */ | |
2699 | "getaddrinfo_a", | |
2700 | /* libgomp */ | |
2701 | "GOMP_parallel_start", | |
2702 | "GOMP_parallel_loop_static_start", | |
2703 | "GOMP_parallel_loop_dynamic_start", | |
2704 | "GOMP_parallel_loop_guided_start", | |
2705 | "GOMP_parallel_loop_runtime_start", | |
43819297 | 2706 | "GOMP_parallel_sections_start", |
9e69ed50 AM |
2707 | }; |
2708 | ||
e2458743 AM |
2709 | if (parameters->options().shared()) |
2710 | thread_safe = true; | |
2711 | else | |
9e69ed50 | 2712 | { |
e2458743 AM |
2713 | for (unsigned int i = 0; |
2714 | i < sizeof(thread_starter) / sizeof(thread_starter[0]); | |
2715 | i++) | |
2716 | { | |
2717 | Symbol* sym = symtab->lookup(thread_starter[i], NULL); | |
2718 | thread_safe = (sym != NULL | |
2719 | && sym->in_reg() | |
2720 | && sym->in_real_elf()); | |
2721 | if (thread_safe) | |
2722 | break; | |
2723 | } | |
9e69ed50 | 2724 | } |
ec661b9d | 2725 | } |
9e69ed50 AM |
2726 | this->plt_thread_safe_ = thread_safe; |
2727 | this->group_sections(layout, task); | |
ec661b9d AM |
2728 | } |
2729 | ||
2730 | // We need address of stub tables valid for make_stub. | |
2731 | for (typename Stub_tables::iterator p = this->stub_tables_.begin(); | |
2732 | p != this->stub_tables_.end(); | |
2733 | ++p) | |
2734 | { | |
2735 | const Powerpc_relobj<size, big_endian>* object | |
2736 | = static_cast<const Powerpc_relobj<size, big_endian>*>((*p)->relobj()); | |
2737 | Address off = object->get_output_section_offset((*p)->shndx()); | |
2738 | gold_assert(off != invalid_address); | |
2739 | Output_section* os = (*p)->output_section(); | |
2740 | (*p)->set_address_and_size(os, off); | |
2741 | } | |
2742 | ||
9e69ed50 AM |
2743 | if (pass != 1) |
2744 | { | |
2745 | // Clear plt call stubs, long branch stubs and branch lookup table. | |
2746 | prev_brlt_size = this->branch_lookup_table_.size(); | |
2747 | this->branch_lookup_table_.clear(); | |
2748 | for (typename Stub_tables::iterator p = this->stub_tables_.begin(); | |
2749 | p != this->stub_tables_.end(); | |
2750 | ++p) | |
2751 | { | |
2752 | (*p)->clear_stubs(); | |
2753 | } | |
2754 | } | |
2755 | ||
2756 | // Build all the stubs. | |
ec661b9d AM |
2757 | Stub_table<size, big_endian>* ifunc_stub_table |
2758 | = this->stub_tables_.size() == 0 ? NULL : this->stub_tables_[0]; | |
2759 | Stub_table<size, big_endian>* one_stub_table | |
2760 | = this->stub_tables_.size() != 1 ? NULL : ifunc_stub_table; | |
2761 | for (typename Branches::const_iterator b = this->branch_info_.begin(); | |
2762 | b != this->branch_info_.end(); | |
2763 | b++) | |
2764 | { | |
2765 | b->make_stub(one_stub_table, ifunc_stub_table, symtab); | |
2766 | } | |
2767 | ||
9e69ed50 | 2768 | // Did anything change size? |
ec661b9d AM |
2769 | unsigned int num_huge_branches = this->branch_lookup_table_.size(); |
2770 | bool again = num_huge_branches != prev_brlt_size; | |
2771 | if (size == 64 && num_huge_branches != 0) | |
2772 | this->make_brlt_section(layout); | |
2773 | if (size == 64 && again) | |
2774 | this->brlt_section_->set_current_size(num_huge_branches); | |
2775 | ||
2776 | typedef Unordered_set<Output_section*> Output_sections; | |
2777 | Output_sections os_need_update; | |
2778 | for (typename Stub_tables::iterator p = this->stub_tables_.begin(); | |
2779 | p != this->stub_tables_.end(); | |
2780 | ++p) | |
2781 | { | |
2782 | if ((*p)->size_update()) | |
2783 | { | |
2784 | again = true; | |
9d5781f8 | 2785 | (*p)->add_eh_frame(layout); |
ec661b9d AM |
2786 | os_need_update.insert((*p)->output_section()); |
2787 | } | |
2788 | } | |
2789 | ||
9e69ed50 AM |
2790 | // Set output section offsets for all input sections in an output |
2791 | // section that just changed size. Anything past the stubs will | |
2792 | // need updating. | |
ec661b9d AM |
2793 | for (typename Output_sections::iterator p = os_need_update.begin(); |
2794 | p != os_need_update.end(); | |
2795 | p++) | |
2796 | { | |
2797 | Output_section* os = *p; | |
2798 | Address off = 0; | |
2799 | typedef Output_section::Input_section_list Input_section_list; | |
2800 | for (Input_section_list::const_iterator i = os->input_sections().begin(); | |
2801 | i != os->input_sections().end(); | |
2802 | ++i) | |
2803 | { | |
2804 | off = align_address(off, i->addralign()); | |
2805 | if (i->is_input_section() || i->is_relaxed_input_section()) | |
2806 | i->relobj()->set_section_offset(i->shndx(), off); | |
2807 | if (i->is_relaxed_input_section()) | |
2808 | { | |
2809 | Stub_table<size, big_endian>* stub_table | |
2810 | = static_cast<Stub_table<size, big_endian>*>( | |
2811 | i->relaxed_input_section()); | |
2812 | off += stub_table->set_address_and_size(os, off); | |
2813 | } | |
2814 | else | |
2815 | off += i->data_size(); | |
2816 | } | |
6830ee24 AM |
2817 | // If .branch_lt is part of this output section, then we have |
2818 | // just done the offset adjustment. | |
ec661b9d AM |
2819 | os->clear_section_offsets_need_adjustment(); |
2820 | } | |
2821 | ||
2822 | if (size == 64 | |
2823 | && !again | |
2824 | && num_huge_branches != 0 | |
2825 | && parameters->options().output_is_position_independent()) | |
2826 | { | |
2827 | // Fill in the BRLT relocs. | |
06f30c9d | 2828 | this->brlt_section_->reset_brlt_sizes(); |
ec661b9d AM |
2829 | for (typename Branch_lookup_table::const_iterator p |
2830 | = this->branch_lookup_table_.begin(); | |
2831 | p != this->branch_lookup_table_.end(); | |
2832 | ++p) | |
2833 | { | |
2834 | this->brlt_section_->add_reloc(p->first, p->second); | |
2835 | } | |
06f30c9d | 2836 | this->brlt_section_->finalize_brlt_sizes(); |
ec661b9d AM |
2837 | } |
2838 | return again; | |
2839 | } | |
2840 | ||
9d5781f8 AM |
2841 | template<int size, bool big_endian> |
2842 | void | |
2843 | Target_powerpc<size, big_endian>::do_plt_fde_location(const Output_data* plt, | |
2844 | unsigned char* oview, | |
2845 | uint64_t* paddress, | |
2846 | off_t* plen) const | |
2847 | { | |
2848 | uint64_t address = plt->address(); | |
2849 | off_t len = plt->data_size(); | |
2850 | ||
2851 | if (plt == this->glink_) | |
2852 | { | |
2853 | // See Output_data_glink::do_write() for glink contents. | |
2854 | if (size == 64) | |
2855 | { | |
2856 | // There is one word before __glink_PLTresolve | |
2857 | address += 8; | |
2858 | len -= 8; | |
2859 | } | |
2860 | else if (parameters->options().output_is_position_independent()) | |
2861 | { | |
2862 | // There are two FDEs for a position independent glink. | |
2863 | // The first covers the branch table, the second | |
2864 | // __glink_PLTresolve at the end of glink. | |
2865 | off_t resolve_size = this->glink_->pltresolve_size; | |
2866 | if (oview[9] == 0) | |
2867 | len -= resolve_size; | |
2868 | else | |
2869 | { | |
2870 | address += len - resolve_size; | |
2871 | len = resolve_size; | |
2872 | } | |
2873 | } | |
2874 | } | |
2875 | else | |
2876 | { | |
2877 | // Must be a stub table. | |
2878 | const Stub_table<size, big_endian>* stub_table | |
2879 | = static_cast<const Stub_table<size, big_endian>*>(plt); | |
2880 | uint64_t stub_address = stub_table->stub_address(); | |
2881 | len -= stub_address - address; | |
2882 | address = stub_address; | |
2883 | } | |
2884 | ||
2885 | *paddress = address; | |
2886 | *plen = len; | |
2887 | } | |
2888 | ||
42cacb20 DE |
2889 | // A class to handle the PLT data. |
2890 | ||
2891 | template<int size, bool big_endian> | |
cf43a2fe | 2892 | class Output_data_plt_powerpc : public Output_section_data_build |
42cacb20 DE |
2893 | { |
2894 | public: | |
2895 | typedef Output_data_reloc<elfcpp::SHT_RELA, true, | |
2896 | size, big_endian> Reloc_section; | |
2897 | ||
e5d5f5ed AM |
2898 | Output_data_plt_powerpc(Target_powerpc<size, big_endian>* targ, |
2899 | Reloc_section* plt_rel, | |
e5d5f5ed AM |
2900 | const char* name) |
2901 | : Output_section_data_build(size == 32 ? 4 : 8), | |
2902 | rel_(plt_rel), | |
2903 | targ_(targ), | |
e5d5f5ed AM |
2904 | name_(name) |
2905 | { } | |
42cacb20 DE |
2906 | |
2907 | // Add an entry to the PLT. | |
03e25981 | 2908 | void |
cf43a2fe | 2909 | add_entry(Symbol*); |
42cacb20 | 2910 | |
03e25981 | 2911 | void |
e5d5f5ed AM |
2912 | add_ifunc_entry(Symbol*); |
2913 | ||
03e25981 | 2914 | void |
e5d5f5ed AM |
2915 | add_local_ifunc_entry(Sized_relobj_file<size, big_endian>*, unsigned int); |
2916 | ||
42cacb20 | 2917 | // Return the .rela.plt section data. |
e5d5f5ed | 2918 | Reloc_section* |
cf43a2fe AM |
2919 | rel_plt() const |
2920 | { | |
42cacb20 DE |
2921 | return this->rel_; |
2922 | } | |
2923 | ||
0e70b911 CC |
2924 | // Return the number of PLT entries. |
2925 | unsigned int | |
2926 | entry_count() const | |
d83ce4e3 | 2927 | { |
b3ccdeb5 AM |
2928 | if (this->current_data_size() == 0) |
2929 | return 0; | |
b4f7960d AM |
2930 | return ((this->current_data_size() - this->first_plt_entry_offset()) |
2931 | / this->plt_entry_size()); | |
d83ce4e3 | 2932 | } |
0e70b911 | 2933 | |
42cacb20 | 2934 | protected: |
42cacb20 | 2935 | void |
cf43a2fe | 2936 | do_adjust_output_section(Output_section* os) |
42cacb20 | 2937 | { |
cf43a2fe | 2938 | os->set_entsize(0); |
42cacb20 DE |
2939 | } |
2940 | ||
6ce78956 AM |
2941 | // Write to a map file. |
2942 | void | |
2943 | do_print_to_mapfile(Mapfile* mapfile) const | |
e5d5f5ed | 2944 | { mapfile->print_output_data(this, this->name_); } |
6ce78956 | 2945 | |
cf43a2fe | 2946 | private: |
b4f7960d AM |
2947 | // Return the offset of the first non-reserved PLT entry. |
2948 | unsigned int | |
2949 | first_plt_entry_offset() const | |
2950 | { | |
2951 | // IPLT has no reserved entry. | |
2952 | if (this->name_[3] == 'I') | |
2953 | return 0; | |
2954 | return this->targ_->first_plt_entry_offset(); | |
2955 | } | |
2956 | ||
2957 | // Return the size of each PLT entry. | |
2958 | unsigned int | |
2959 | plt_entry_size() const | |
2960 | { | |
2961 | return this->targ_->plt_entry_size(); | |
2962 | } | |
cf43a2fe | 2963 | |
42cacb20 DE |
2964 | // Write out the PLT data. |
2965 | void | |
2966 | do_write(Output_file*); | |
2967 | ||
2968 | // The reloc section. | |
2969 | Reloc_section* rel_; | |
cf43a2fe AM |
2970 | // Allows access to .glink for do_write. |
2971 | Target_powerpc<size, big_endian>* targ_; | |
e5d5f5ed AM |
2972 | // What to report in map file. |
2973 | const char *name_; | |
42cacb20 DE |
2974 | }; |
2975 | ||
e5d5f5ed | 2976 | // Add an entry to the PLT. |
42cacb20 DE |
2977 | |
2978 | template<int size, bool big_endian> | |
03e25981 | 2979 | void |
e5d5f5ed | 2980 | Output_data_plt_powerpc<size, big_endian>::add_entry(Symbol* gsym) |
42cacb20 | 2981 | { |
e5d5f5ed AM |
2982 | if (!gsym->has_plt_offset()) |
2983 | { | |
ec661b9d | 2984 | section_size_type off = this->current_data_size(); |
e5d5f5ed AM |
2985 | if (off == 0) |
2986 | off += this->first_plt_entry_offset(); | |
2987 | gsym->set_plt_offset(off); | |
2988 | gsym->set_needs_dynsym_entry(); | |
2989 | unsigned int dynrel = elfcpp::R_POWERPC_JMP_SLOT; | |
2990 | this->rel_->add_global(gsym, dynrel, this, off, 0); | |
b4f7960d | 2991 | off += this->plt_entry_size(); |
e5d5f5ed AM |
2992 | this->set_current_data_size(off); |
2993 | } | |
42cacb20 DE |
2994 | } |
2995 | ||
e5d5f5ed | 2996 | // Add an entry for a global ifunc symbol that resolves locally, to the IPLT. |
42cacb20 DE |
2997 | |
2998 | template<int size, bool big_endian> | |
03e25981 | 2999 | void |
e5d5f5ed | 3000 | Output_data_plt_powerpc<size, big_endian>::add_ifunc_entry(Symbol* gsym) |
42cacb20 | 3001 | { |
cf43a2fe AM |
3002 | if (!gsym->has_plt_offset()) |
3003 | { | |
ec661b9d | 3004 | section_size_type off = this->current_data_size(); |
cf43a2fe | 3005 | gsym->set_plt_offset(off); |
e5d5f5ed | 3006 | unsigned int dynrel = elfcpp::R_POWERPC_IRELATIVE; |
b4f7960d | 3007 | if (size == 64 && this->targ_->abiversion() < 2) |
e5d5f5ed AM |
3008 | dynrel = elfcpp::R_PPC64_JMP_IREL; |
3009 | this->rel_->add_symbolless_global_addend(gsym, dynrel, this, off, 0); | |
b4f7960d | 3010 | off += this->plt_entry_size(); |
e5d5f5ed AM |
3011 | this->set_current_data_size(off); |
3012 | } | |
3013 | } | |
3014 | ||
3015 | // Add an entry for a local ifunc symbol to the IPLT. | |
3016 | ||
3017 | template<int size, bool big_endian> | |
03e25981 | 3018 | void |
e5d5f5ed AM |
3019 | Output_data_plt_powerpc<size, big_endian>::add_local_ifunc_entry( |
3020 | Sized_relobj_file<size, big_endian>* relobj, | |
3021 | unsigned int local_sym_index) | |
3022 | { | |
3023 | if (!relobj->local_has_plt_offset(local_sym_index)) | |
3024 | { | |
ec661b9d | 3025 | section_size_type off = this->current_data_size(); |
e5d5f5ed AM |
3026 | relobj->set_local_plt_offset(local_sym_index, off); |
3027 | unsigned int dynrel = elfcpp::R_POWERPC_IRELATIVE; | |
b4f7960d | 3028 | if (size == 64 && this->targ_->abiversion() < 2) |
e5d5f5ed AM |
3029 | dynrel = elfcpp::R_PPC64_JMP_IREL; |
3030 | this->rel_->add_symbolless_local_addend(relobj, local_sym_index, dynrel, | |
3031 | this, off, 0); | |
b4f7960d | 3032 | off += this->plt_entry_size(); |
cf43a2fe AM |
3033 | this->set_current_data_size(off); |
3034 | } | |
42cacb20 DE |
3035 | } |
3036 | ||
dd93cd0a | 3037 | static const uint32_t add_0_11_11 = 0x7c0b5a14; |
9e69ed50 | 3038 | static const uint32_t add_2_2_11 = 0x7c425a14; |
dd93cd0a AM |
3039 | static const uint32_t add_3_3_2 = 0x7c631214; |
3040 | static const uint32_t add_3_3_13 = 0x7c636a14; | |
3041 | static const uint32_t add_11_0_11 = 0x7d605a14; | |
b4f7960d AM |
3042 | static const uint32_t add_11_2_11 = 0x7d625a14; |
3043 | static const uint32_t add_11_11_2 = 0x7d6b1214; | |
3044 | static const uint32_t addi_0_12 = 0x380c0000; | |
dd93cd0a | 3045 | static const uint32_t addi_2_2 = 0x38420000; |
dd93cd0a | 3046 | static const uint32_t addi_3_3 = 0x38630000; |
b4f7960d AM |
3047 | static const uint32_t addi_11_11 = 0x396b0000; |
3048 | static const uint32_t addi_12_12 = 0x398c0000; | |
dd93cd0a AM |
3049 | static const uint32_t addis_0_2 = 0x3c020000; |
3050 | static const uint32_t addis_0_13 = 0x3c0d0000; | |
b4f7960d AM |
3051 | static const uint32_t addis_3_2 = 0x3c620000; |
3052 | static const uint32_t addis_3_13 = 0x3c6d0000; | |
3053 | static const uint32_t addis_11_2 = 0x3d620000; | |
c9269dff AM |
3054 | static const uint32_t addis_11_11 = 0x3d6b0000; |
3055 | static const uint32_t addis_11_30 = 0x3d7e0000; | |
3056 | static const uint32_t addis_12_12 = 0x3d8c0000; | |
c9269dff AM |
3057 | static const uint32_t b = 0x48000000; |
3058 | static const uint32_t bcl_20_31 = 0x429f0005; | |
3059 | static const uint32_t bctr = 0x4e800420; | |
f3a0ed29 | 3060 | static const uint32_t blr = 0x4e800020; |
9e69ed50 AM |
3061 | static const uint32_t bnectr_p4 = 0x4ce20420; |
3062 | static const uint32_t cmpldi_2_0 = 0x28220000; | |
dd93cd0a AM |
3063 | static const uint32_t cror_15_15_15 = 0x4def7b82; |
3064 | static const uint32_t cror_31_31_31 = 0x4ffffb82; | |
f3a0ed29 AM |
3065 | static const uint32_t ld_0_1 = 0xe8010000; |
3066 | static const uint32_t ld_0_12 = 0xe80c0000; | |
dd93cd0a | 3067 | static const uint32_t ld_2_1 = 0xe8410000; |
dd93cd0a | 3068 | static const uint32_t ld_2_2 = 0xe8420000; |
b4f7960d AM |
3069 | static const uint32_t ld_2_11 = 0xe84b0000; |
3070 | static const uint32_t ld_11_2 = 0xe9620000; | |
3071 | static const uint32_t ld_11_11 = 0xe96b0000; | |
3072 | static const uint32_t ld_12_2 = 0xe9820000; | |
3073 | static const uint32_t ld_12_11 = 0xe98b0000; | |
9055360d | 3074 | static const uint32_t ld_12_12 = 0xe98c0000; |
f3a0ed29 | 3075 | static const uint32_t lfd_0_1 = 0xc8010000; |
dd93cd0a | 3076 | static const uint32_t li_0_0 = 0x38000000; |
f3a0ed29 | 3077 | static const uint32_t li_12_0 = 0x39800000; |
dd93cd0a | 3078 | static const uint32_t lis_0_0 = 0x3c000000; |
c9269dff AM |
3079 | static const uint32_t lis_11 = 0x3d600000; |
3080 | static const uint32_t lis_12 = 0x3d800000; | |
b4f7960d | 3081 | static const uint32_t lvx_0_12_0 = 0x7c0c00ce; |
c9269dff AM |
3082 | static const uint32_t lwz_0_12 = 0x800c0000; |
3083 | static const uint32_t lwz_11_11 = 0x816b0000; | |
3084 | static const uint32_t lwz_11_30 = 0x817e0000; | |
3085 | static const uint32_t lwz_12_12 = 0x818c0000; | |
dd93cd0a | 3086 | static const uint32_t lwzu_0_12 = 0x840c0000; |
c9269dff | 3087 | static const uint32_t mflr_0 = 0x7c0802a6; |
dd93cd0a | 3088 | static const uint32_t mflr_11 = 0x7d6802a6; |
c9269dff AM |
3089 | static const uint32_t mflr_12 = 0x7d8802a6; |
3090 | static const uint32_t mtctr_0 = 0x7c0903a6; | |
3091 | static const uint32_t mtctr_11 = 0x7d6903a6; | |
ec661b9d | 3092 | static const uint32_t mtctr_12 = 0x7d8903a6; |
c9269dff | 3093 | static const uint32_t mtlr_0 = 0x7c0803a6; |
c9269dff | 3094 | static const uint32_t mtlr_12 = 0x7d8803a6; |
dd93cd0a | 3095 | static const uint32_t nop = 0x60000000; |
c9269dff | 3096 | static const uint32_t ori_0_0_0 = 0x60000000; |
b4f7960d | 3097 | static const uint32_t srdi_0_0_2 = 0x7800f082; |
f3a0ed29 AM |
3098 | static const uint32_t std_0_1 = 0xf8010000; |
3099 | static const uint32_t std_0_12 = 0xf80c0000; | |
dd93cd0a | 3100 | static const uint32_t std_2_1 = 0xf8410000; |
f3a0ed29 AM |
3101 | static const uint32_t stfd_0_1 = 0xd8010000; |
3102 | static const uint32_t stvx_0_12_0 = 0x7c0c01ce; | |
dd93cd0a | 3103 | static const uint32_t sub_11_11_12 = 0x7d6c5850; |
b4f7960d AM |
3104 | static const uint32_t sub_12_12_11 = 0x7d8b6050; |
3105 | static const uint32_t xor_2_12_12 = 0x7d826278; | |
3106 | static const uint32_t xor_11_12_12 = 0x7d8b6278; | |
42cacb20 DE |
3107 | |
3108 | // Write out the PLT. | |
3109 | ||
3110 | template<int size, bool big_endian> | |
3111 | void | |
3112 | Output_data_plt_powerpc<size, big_endian>::do_write(Output_file* of) | |
3113 | { | |
b3ccdeb5 | 3114 | if (size == 32 && this->name_[3] != 'I') |
cf43a2fe | 3115 | { |
ec661b9d | 3116 | const section_size_type offset = this->offset(); |
cf43a2fe AM |
3117 | const section_size_type oview_size |
3118 | = convert_to_section_size_type(this->data_size()); | |
3119 | unsigned char* const oview = of->get_output_view(offset, oview_size); | |
3120 | unsigned char* pov = oview; | |
3121 | unsigned char* endpov = oview + oview_size; | |
3122 | ||
e5d5f5ed | 3123 | // The address of the .glink branch table |
cf43a2fe AM |
3124 | const Output_data_glink<size, big_endian>* glink |
3125 | = this->targ_->glink_section(); | |
ec661b9d | 3126 | elfcpp::Elf_types<32>::Elf_Addr branch_tab = glink->address(); |
cf43a2fe AM |
3127 | |
3128 | while (pov < endpov) | |
3129 | { | |
3130 | elfcpp::Swap<32, big_endian>::writeval(pov, branch_tab); | |
3131 | pov += 4; | |
3132 | branch_tab += 4; | |
3133 | } | |
3134 | ||
3135 | of->write_output_view(offset, oview_size, oview); | |
3136 | } | |
3137 | } | |
3138 | ||
3139 | // Create the PLT section. | |
3140 | ||
3141 | template<int size, bool big_endian> | |
3142 | void | |
40b469d7 AM |
3143 | Target_powerpc<size, big_endian>::make_plt_section(Symbol_table* symtab, |
3144 | Layout* layout) | |
cf43a2fe AM |
3145 | { |
3146 | if (this->plt_ == NULL) | |
3147 | { | |
40b469d7 AM |
3148 | if (this->got_ == NULL) |
3149 | this->got_section(symtab, layout); | |
3150 | ||
cf43a2fe AM |
3151 | if (this->glink_ == NULL) |
3152 | make_glink_section(layout); | |
3153 | ||
3154 | // Ensure that .rela.dyn always appears before .rela.plt This is | |
3155 | // necessary due to how, on PowerPC and some other targets, .rela.dyn | |
b3ccdeb5 | 3156 | // needs to include .rela.plt in its range. |
cf43a2fe AM |
3157 | this->rela_dyn_section(layout); |
3158 | ||
e5d5f5ed AM |
3159 | Reloc_section* plt_rel = new Reloc_section(false); |
3160 | layout->add_output_section_data(".rela.plt", elfcpp::SHT_RELA, | |
3161 | elfcpp::SHF_ALLOC, plt_rel, | |
3162 | ORDER_DYNAMIC_PLT_RELOCS, false); | |
3163 | this->plt_ | |
3164 | = new Output_data_plt_powerpc<size, big_endian>(this, plt_rel, | |
e5d5f5ed | 3165 | "** PLT"); |
cf43a2fe AM |
3166 | layout->add_output_section_data(".plt", |
3167 | (size == 32 | |
3168 | ? elfcpp::SHT_PROGBITS | |
3169 | : elfcpp::SHT_NOBITS), | |
3170 | elfcpp::SHF_ALLOC | elfcpp::SHF_WRITE, | |
3171 | this->plt_, | |
3172 | (size == 32 | |
3173 | ? ORDER_SMALL_DATA | |
3174 | : ORDER_SMALL_BSS), | |
3175 | false); | |
3176 | } | |
3177 | } | |
3178 | ||
e5d5f5ed AM |
3179 | // Create the IPLT section. |
3180 | ||
3181 | template<int size, bool big_endian> | |
3182 | void | |
40b469d7 AM |
3183 | Target_powerpc<size, big_endian>::make_iplt_section(Symbol_table* symtab, |
3184 | Layout* layout) | |
e5d5f5ed AM |
3185 | { |
3186 | if (this->iplt_ == NULL) | |
3187 | { | |
40b469d7 | 3188 | this->make_plt_section(symtab, layout); |
e5d5f5ed AM |
3189 | |
3190 | Reloc_section* iplt_rel = new Reloc_section(false); | |
3191 | this->rela_dyn_->output_section()->add_output_section_data(iplt_rel); | |
3192 | this->iplt_ | |
3193 | = new Output_data_plt_powerpc<size, big_endian>(this, iplt_rel, | |
b4f7960d | 3194 | "** IPLT"); |
e5d5f5ed | 3195 | this->plt_->output_section()->add_output_section_data(this->iplt_); |
e5d5f5ed AM |
3196 | } |
3197 | } | |
3198 | ||
ec661b9d | 3199 | // A section for huge long branch addresses, similar to plt section. |
cf43a2fe AM |
3200 | |
3201 | template<int size, bool big_endian> | |
ec661b9d | 3202 | class Output_data_brlt_powerpc : public Output_section_data_build |
cf43a2fe AM |
3203 | { |
3204 | public: | |
ec661b9d AM |
3205 | typedef typename elfcpp::Elf_types<size>::Elf_Addr Address; |
3206 | typedef Output_data_reloc<elfcpp::SHT_RELA, true, | |
3207 | size, big_endian> Reloc_section; | |
c9269dff | 3208 | |
ec661b9d AM |
3209 | Output_data_brlt_powerpc(Target_powerpc<size, big_endian>* targ, |
3210 | Reloc_section* brlt_rel) | |
3211 | : Output_section_data_build(size == 32 ? 4 : 8), | |
3212 | rel_(brlt_rel), | |
3213 | targ_(targ) | |
3214 | { } | |
cf43a2fe | 3215 | |
06f30c9d CC |
3216 | void |
3217 | reset_brlt_sizes() | |
3218 | { | |
3219 | this->reset_data_size(); | |
3220 | this->rel_->reset_data_size(); | |
3221 | } | |
3222 | ||
3223 | void | |
3224 | finalize_brlt_sizes() | |
3225 | { | |
3226 | this->finalize_data_size(); | |
3227 | this->rel_->finalize_data_size(); | |
3228 | } | |
3229 | ||
ec661b9d | 3230 | // Add a reloc for an entry in the BRLT. |
cf43a2fe | 3231 | void |
ec661b9d AM |
3232 | add_reloc(Address to, unsigned int off) |
3233 | { this->rel_->add_relative(elfcpp::R_POWERPC_RELATIVE, this, off, to); } | |
e5d5f5ed | 3234 | |
ec661b9d | 3235 | // Update section and reloc section size. |
e5d5f5ed | 3236 | void |
ec661b9d AM |
3237 | set_current_size(unsigned int num_branches) |
3238 | { | |
3239 | this->reset_address_and_file_offset(); | |
3240 | this->set_current_data_size(num_branches * 16); | |
3241 | this->finalize_data_size(); | |
3242 | Output_section* os = this->output_section(); | |
3243 | os->set_section_offsets_need_adjustment(); | |
3244 | if (this->rel_ != NULL) | |
3245 | { | |
3246 | unsigned int reloc_size | |
3247 | = Reloc_types<elfcpp::SHT_RELA, size, big_endian>::reloc_size; | |
3248 | this->rel_->reset_address_and_file_offset(); | |
3249 | this->rel_->set_current_data_size(num_branches * reloc_size); | |
3250 | this->rel_->finalize_data_size(); | |
3251 | Output_section* os = this->rel_->output_section(); | |
3252 | os->set_section_offsets_need_adjustment(); | |
3253 | } | |
3254 | } | |
cf43a2fe | 3255 | |
ec661b9d AM |
3256 | protected: |
3257 | void | |
3258 | do_adjust_output_section(Output_section* os) | |
3259 | { | |
3260 | os->set_entsize(0); | |
3261 | } | |
e5d5f5ed | 3262 | |
ec661b9d AM |
3263 | // Write to a map file. |
3264 | void | |
3265 | do_print_to_mapfile(Mapfile* mapfile) const | |
3266 | { mapfile->print_output_data(this, "** BRLT"); } | |
c9824451 | 3267 | |
ec661b9d AM |
3268 | private: |
3269 | // Write out the BRLT data. | |
3270 | void | |
3271 | do_write(Output_file*); | |
c9824451 | 3272 | |
ec661b9d AM |
3273 | // The reloc section. |
3274 | Reloc_section* rel_; | |
3275 | Target_powerpc<size, big_endian>* targ_; | |
3276 | }; | |
cf43a2fe | 3277 | |
ec661b9d AM |
3278 | // Make the branch lookup table section. |
3279 | ||
3280 | template<int size, bool big_endian> | |
3281 | void | |
3282 | Target_powerpc<size, big_endian>::make_brlt_section(Layout* layout) | |
3283 | { | |
3284 | if (size == 64 && this->brlt_section_ == NULL) | |
3285 | { | |
3286 | Reloc_section* brlt_rel = NULL; | |
3287 | bool is_pic = parameters->options().output_is_position_independent(); | |
3288 | if (is_pic) | |
3289 | { | |
6830ee24 AM |
3290 | // When PIC we can't fill in .branch_lt (like .plt it can be |
3291 | // a bss style section) but must initialise at runtime via | |
ec661b9d AM |
3292 | // dynamic relocats. |
3293 | this->rela_dyn_section(layout); | |
3294 | brlt_rel = new Reloc_section(false); | |
3295 | this->rela_dyn_->output_section()->add_output_section_data(brlt_rel); | |
3296 | } | |
3297 | this->brlt_section_ | |
3298 | = new Output_data_brlt_powerpc<size, big_endian>(this, brlt_rel); | |
3299 | if (this->plt_ && is_pic) | |
3300 | this->plt_->output_section() | |
3301 | ->add_output_section_data(this->brlt_section_); | |
3302 | else | |
6830ee24 | 3303 | layout->add_output_section_data(".branch_lt", |
ec661b9d AM |
3304 | (is_pic ? elfcpp::SHT_NOBITS |
3305 | : elfcpp::SHT_PROGBITS), | |
3306 | elfcpp::SHF_ALLOC | elfcpp::SHF_WRITE, | |
3307 | this->brlt_section_, | |
3308 | (is_pic ? ORDER_SMALL_BSS | |
3309 | : ORDER_SMALL_DATA), | |
3310 | false); | |
3311 | } | |
3312 | } | |
3313 | ||
6830ee24 | 3314 | // Write out .branch_lt when non-PIC. |
ec661b9d AM |
3315 | |
3316 | template<int size, bool big_endian> | |
3317 | void | |
3318 | Output_data_brlt_powerpc<size, big_endian>::do_write(Output_file* of) | |
3319 | { | |
3320 | if (size == 64 && !parameters->options().output_is_position_independent()) | |
3321 | { | |
3322 | const section_size_type offset = this->offset(); | |
3323 | const section_size_type oview_size | |
3324 | = convert_to_section_size_type(this->data_size()); | |
3325 | unsigned char* const oview = of->get_output_view(offset, oview_size); | |
3326 | ||
3327 | this->targ_->write_branch_lookup_table(oview); | |
3328 | of->write_output_view(offset, oview_size, oview); | |
3329 | } | |
3330 | } | |
3331 | ||
9e69ed50 AM |
3332 | static inline uint32_t |
3333 | l(uint32_t a) | |
3334 | { | |
3335 | return a & 0xffff; | |
3336 | } | |
3337 | ||
3338 | static inline uint32_t | |
3339 | hi(uint32_t a) | |
3340 | { | |
3341 | return l(a >> 16); | |
3342 | } | |
3343 | ||
3344 | static inline uint32_t | |
3345 | ha(uint32_t a) | |
3346 | { | |
3347 | return hi(a + 0x8000); | |
3348 | } | |
3349 | ||
9d5781f8 AM |
3350 | template<int size> |
3351 | struct Eh_cie | |
3352 | { | |
3353 | static const unsigned char eh_frame_cie[12]; | |
3354 | }; | |
3355 | ||
3356 | template<int size> | |
3357 | const unsigned char Eh_cie<size>::eh_frame_cie[] = | |
3358 | { | |
3359 | 1, // CIE version. | |
3360 | 'z', 'R', 0, // Augmentation string. | |
3361 | 4, // Code alignment. | |
3362 | 0x80 - size / 8 , // Data alignment. | |
3363 | 65, // RA reg. | |
3364 | 1, // Augmentation size. | |
3365 | (elfcpp::DW_EH_PE_pcrel | |
3366 | | elfcpp::DW_EH_PE_sdata4), // FDE encoding. | |
3367 | elfcpp::DW_CFA_def_cfa, 1, 0 // def_cfa: r1 offset 0. | |
3368 | }; | |
3369 | ||
b4f7960d AM |
3370 | // Describe __glink_PLTresolve use of LR, 64-bit version ABIv1. |
3371 | static const unsigned char glink_eh_frame_fde_64v1[] = | |
9d5781f8 AM |
3372 | { |
3373 | 0, 0, 0, 0, // Replaced with offset to .glink. | |
3374 | 0, 0, 0, 0, // Replaced with size of .glink. | |
3375 | 0, // Augmentation size. | |
3376 | elfcpp::DW_CFA_advance_loc + 1, | |
3377 | elfcpp::DW_CFA_register, 65, 12, | |
3378 | elfcpp::DW_CFA_advance_loc + 4, | |
3379 | elfcpp::DW_CFA_restore_extended, 65 | |
3380 | }; | |
3381 | ||
b4f7960d AM |
3382 | // Describe __glink_PLTresolve use of LR, 64-bit version ABIv2. |
3383 | static const unsigned char glink_eh_frame_fde_64v2[] = | |
3384 | { | |
3385 | 0, 0, 0, 0, // Replaced with offset to .glink. | |
3386 | 0, 0, 0, 0, // Replaced with size of .glink. | |
3387 | 0, // Augmentation size. | |
3388 | elfcpp::DW_CFA_advance_loc + 1, | |
3389 | elfcpp::DW_CFA_register, 65, 0, | |
3390 | elfcpp::DW_CFA_advance_loc + 4, | |
3391 | elfcpp::DW_CFA_restore_extended, 65 | |
3392 | }; | |
3393 | ||
9d5781f8 AM |
3394 | // Describe __glink_PLTresolve use of LR, 32-bit version. |
3395 | static const unsigned char glink_eh_frame_fde_32[] = | |
3396 | { | |
3397 | 0, 0, 0, 0, // Replaced with offset to .glink. | |
3398 | 0, 0, 0, 0, // Replaced with size of .glink. | |
3399 | 0, // Augmentation size. | |
3400 | elfcpp::DW_CFA_advance_loc + 2, | |
3401 | elfcpp::DW_CFA_register, 65, 0, | |
3402 | elfcpp::DW_CFA_advance_loc + 4, | |
3403 | elfcpp::DW_CFA_restore_extended, 65 | |
3404 | }; | |
3405 | ||
3406 | static const unsigned char default_fde[] = | |
3407 | { | |
3408 | 0, 0, 0, 0, // Replaced with offset to stubs. | |
3409 | 0, 0, 0, 0, // Replaced with size of stubs. | |
3410 | 0, // Augmentation size. | |
3411 | elfcpp::DW_CFA_nop, // Pad. | |
3412 | elfcpp::DW_CFA_nop, | |
3413 | elfcpp::DW_CFA_nop | |
3414 | }; | |
3415 | ||
9e69ed50 AM |
3416 | template<bool big_endian> |
3417 | static inline void | |
3418 | write_insn(unsigned char* p, uint32_t v) | |
3419 | { | |
3420 | elfcpp::Swap<32, big_endian>::writeval(p, v); | |
3421 | } | |
3422 | ||
ec661b9d AM |
3423 | // Stub_table holds information about plt and long branch stubs. |
3424 | // Stubs are built in an area following some input section determined | |
3425 | // by group_sections(). This input section is converted to a relaxed | |
3426 | // input section allowing it to be resized to accommodate the stubs | |
3427 | ||
3428 | template<int size, bool big_endian> | |
3429 | class Stub_table : public Output_relaxed_input_section | |
3430 | { | |
3431 | public: | |
3432 | typedef typename elfcpp::Elf_types<size>::Elf_Addr Address; | |
3433 | static const Address invalid_address = static_cast<Address>(0) - 1; | |
3434 | ||
3435 | Stub_table(Target_powerpc<size, big_endian>* targ) | |
3436 | : Output_relaxed_input_section(NULL, 0, 0), | |
3437 | targ_(targ), plt_call_stubs_(), long_branch_stubs_(), | |
9e69ed50 | 3438 | orig_data_size_(0), plt_size_(0), last_plt_size_(0), |
9d5781f8 | 3439 | branch_size_(0), last_branch_size_(0), eh_frame_added_(false) |
ec661b9d AM |
3440 | { } |
3441 | ||
3442 | // Delayed Output_relaxed_input_section init. | |
3443 | void | |
3444 | init(const Output_section::Input_section*, Output_section*); | |
3445 | ||
3446 | // Add a plt call stub. | |
3447 | void | |
3448 | add_plt_call_entry(const Sized_relobj_file<size, big_endian>*, | |
3449 | const Symbol*, | |
3450 | unsigned int, | |
3451 | Address); | |
3452 | ||
3453 | void | |
3454 | add_plt_call_entry(const Sized_relobj_file<size, big_endian>*, | |
3455 | unsigned int, | |
3456 | unsigned int, | |
3457 | Address); | |
3458 | ||
3459 | // Find a given plt call stub. | |
3460 | Address | |
3461 | find_plt_call_entry(const Symbol*) const; | |
3462 | ||
3463 | Address | |
3464 | find_plt_call_entry(const Sized_relobj_file<size, big_endian>*, | |
3465 | unsigned int) const; | |
3466 | ||
3467 | Address | |
3468 | find_plt_call_entry(const Sized_relobj_file<size, big_endian>*, | |
3469 | const Symbol*, | |
3470 | unsigned int, | |
3471 | Address) const; | |
3472 | ||
3473 | Address | |
3474 | find_plt_call_entry(const Sized_relobj_file<size, big_endian>*, | |
3475 | unsigned int, | |
3476 | unsigned int, | |
3477 | Address) const; | |
3478 | ||
3479 | // Add a long branch stub. | |
3480 | void | |
3481 | add_long_branch_entry(const Powerpc_relobj<size, big_endian>*, Address); | |
3482 | ||
3483 | Address | |
9d5781f8 AM |
3484 | find_long_branch_entry(const Powerpc_relobj<size, big_endian>*, |
3485 | Address) const; | |
ec661b9d AM |
3486 | |
3487 | void | |
9e69ed50 | 3488 | clear_stubs() |
cf43a2fe | 3489 | { |
9e69ed50 AM |
3490 | this->plt_call_stubs_.clear(); |
3491 | this->plt_size_ = 0; | |
ec661b9d AM |
3492 | this->long_branch_stubs_.clear(); |
3493 | this->branch_size_ = 0; | |
cf43a2fe AM |
3494 | } |
3495 | ||
ec661b9d AM |
3496 | Address |
3497 | set_address_and_size(const Output_section* os, Address off) | |
cf43a2fe | 3498 | { |
ec661b9d AM |
3499 | Address start_off = off; |
3500 | off += this->orig_data_size_; | |
3501 | Address my_size = this->plt_size_ + this->branch_size_; | |
3502 | if (my_size != 0) | |
3503 | off = align_address(off, this->stub_align()); | |
3504 | // Include original section size and alignment padding in size | |
3505 | my_size += off - start_off; | |
3506 | this->reset_address_and_file_offset(); | |
3507 | this->set_current_data_size(my_size); | |
3508 | this->set_address_and_file_offset(os->address() + start_off, | |
3509 | os->offset() + start_off); | |
3510 | return my_size; | |
cf43a2fe AM |
3511 | } |
3512 | ||
ec661b9d | 3513 | Address |
9d5781f8 | 3514 | stub_address() const |
ec661b9d AM |
3515 | { |
3516 | return align_address(this->address() + this->orig_data_size_, | |
3517 | this->stub_align()); | |
3518 | } | |
3519 | ||
3520 | Address | |
9d5781f8 | 3521 | stub_offset() const |
ec661b9d AM |
3522 | { |
3523 | return align_address(this->offset() + this->orig_data_size_, | |
3524 | this->stub_align()); | |
3525 | } | |
3526 | ||
3527 | section_size_type | |
3528 | plt_size() const | |
3529 | { return this->plt_size_; } | |
3530 | ||
3531 | bool | |
3532 | size_update() | |
3533 | { | |
3534 | Output_section* os = this->output_section(); | |
3535 | if (os->addralign() < this->stub_align()) | |
3536 | { | |
3537 | os->set_addralign(this->stub_align()); | |
3538 | // FIXME: get rid of the insane checkpointing. | |
3539 | // We can't increase alignment of the input section to which | |
3540 | // stubs are attached; The input section may be .init which | |
3541 | // is pasted together with other .init sections to form a | |
3542 | // function. Aligning might insert zero padding resulting in | |
3543 | // sigill. However we do need to increase alignment of the | |
3544 | // output section so that the align_address() on offset in | |
3545 | // set_address_and_size() adds the same padding as the | |
3546 | // align_address() on address in stub_address(). | |
3547 | // What's more, we need this alignment for the layout done in | |
3548 | // relaxation_loop_body() so that the output section starts at | |
3549 | // a suitably aligned address. | |
3550 | os->checkpoint_set_addralign(this->stub_align()); | |
3551 | } | |
9e69ed50 AM |
3552 | if (this->last_plt_size_ != this->plt_size_ |
3553 | || this->last_branch_size_ != this->branch_size_) | |
ec661b9d | 3554 | { |
9e69ed50 AM |
3555 | this->last_plt_size_ = this->plt_size_; |
3556 | this->last_branch_size_ = this->branch_size_; | |
ec661b9d AM |
3557 | return true; |
3558 | } | |
3559 | return false; | |
3560 | } | |
3561 | ||
9d5781f8 AM |
3562 | // Add .eh_frame info for this stub section. Unlike other linker |
3563 | // generated .eh_frame this is added late in the link, because we | |
3564 | // only want the .eh_frame info if this particular stub section is | |
3565 | // non-empty. | |
3566 | void | |
3567 | add_eh_frame(Layout* layout) | |
3568 | { | |
3569 | if (!this->eh_frame_added_) | |
3570 | { | |
3571 | if (!parameters->options().ld_generated_unwind_info()) | |
3572 | return; | |
3573 | ||
3574 | // Since we add stub .eh_frame info late, it must be placed | |
3575 | // after all other linker generated .eh_frame info so that | |
3576 | // merge mapping need not be updated for input sections. | |
3577 | // There is no provision to use a different CIE to that used | |
3578 | // by .glink. | |
3579 | if (!this->targ_->has_glink()) | |
3580 | return; | |
3581 | ||
3582 | layout->add_eh_frame_for_plt(this, | |
3583 | Eh_cie<size>::eh_frame_cie, | |
3584 | sizeof (Eh_cie<size>::eh_frame_cie), | |
3585 | default_fde, | |
3586 | sizeof (default_fde)); | |
3587 | this->eh_frame_added_ = true; | |
3588 | } | |
3589 | } | |
3590 | ||
ec661b9d AM |
3591 | Target_powerpc<size, big_endian>* |
3592 | targ() const | |
3593 | { return targ_; } | |
6ce78956 | 3594 | |
cf43a2fe | 3595 | private: |
9e69ed50 AM |
3596 | class Plt_stub_ent; |
3597 | class Plt_stub_ent_hash; | |
3598 | typedef Unordered_map<Plt_stub_ent, unsigned int, | |
3599 | Plt_stub_ent_hash> Plt_stub_entries; | |
3600 | ||
3601 | // Alignment of stub section. | |
ec661b9d | 3602 | unsigned int |
9e69ed50 AM |
3603 | stub_align() const |
3604 | { | |
3605 | if (size == 32) | |
3606 | return 16; | |
3607 | unsigned int min_align = 32; | |
3608 | unsigned int user_align = 1 << parameters->options().plt_align(); | |
3609 | return std::max(user_align, min_align); | |
3610 | } | |
cf43a2fe | 3611 | |
91c2b899 AM |
3612 | // Return the plt offset for the given call stub. |
3613 | Address | |
3614 | plt_off(typename Plt_stub_entries::const_iterator p, bool* is_iplt) const | |
3615 | { | |
3616 | const Symbol* gsym = p->first.sym_; | |
3617 | if (gsym != NULL) | |
3618 | { | |
3619 | *is_iplt = (gsym->type() == elfcpp::STT_GNU_IFUNC | |
3620 | && gsym->can_use_relative_reloc(false)); | |
3621 | return gsym->plt_offset(); | |
3622 | } | |
3623 | else | |
3624 | { | |
3625 | *is_iplt = true; | |
3626 | const Sized_relobj_file<size, big_endian>* relobj = p->first.object_; | |
3627 | unsigned int local_sym_index = p->first.locsym_; | |
3628 | return relobj->local_plt_offset(local_sym_index); | |
3629 | } | |
3630 | } | |
3631 | ||
9e69ed50 | 3632 | // Size of a given plt call stub. |
ec661b9d | 3633 | unsigned int |
9e69ed50 AM |
3634 | plt_call_size(typename Plt_stub_entries::const_iterator p) const |
3635 | { | |
3636 | if (size == 32) | |
3637 | return 16; | |
3638 | ||
91c2b899 AM |
3639 | bool is_iplt; |
3640 | Address plt_addr = this->plt_off(p, &is_iplt); | |
3641 | if (is_iplt) | |
3642 | plt_addr += this->targ_->iplt_section()->address(); | |
9e69ed50 | 3643 | else |
91c2b899 AM |
3644 | plt_addr += this->targ_->plt_section()->address(); |
3645 | Address got_addr = this->targ_->got_section()->output_section()->address(); | |
9e69ed50 AM |
3646 | const Powerpc_relobj<size, big_endian>* ppcobj = static_cast |
3647 | <const Powerpc_relobj<size, big_endian>*>(p->first.object_); | |
91c2b899 AM |
3648 | got_addr += ppcobj->toc_base_offset(); |
3649 | Address off = plt_addr - got_addr; | |
b4f7960d AM |
3650 | unsigned int bytes = 4 * 4 + 4 * (ha(off) != 0); |
3651 | if (this->targ_->abiversion() < 2) | |
3652 | { | |
3653 | bool static_chain = parameters->options().plt_static_chain(); | |
3654 | bool thread_safe = this->targ_->plt_thread_safe(); | |
3655 | bytes += (4 | |
3656 | + 4 * static_chain | |
3657 | + 8 * thread_safe | |
3658 | + 4 * (ha(off + 8 + 8 * static_chain) != ha(off))); | |
3659 | } | |
9e69ed50 AM |
3660 | unsigned int align = 1 << parameters->options().plt_align(); |
3661 | if (align > 1) | |
3662 | bytes = (bytes + align - 1) & -align; | |
3663 | return bytes; | |
3664 | } | |
ec661b9d AM |
3665 | |
3666 | // Return long branch stub size. | |
3667 | unsigned int | |
3668 | branch_stub_size(Address to) | |
3669 | { | |
9e69ed50 AM |
3670 | Address loc |
3671 | = this->stub_address() + this->last_plt_size_ + this->branch_size_; | |
3672 | if (to - loc + (1 << 25) < 2 << 25) | |
ec661b9d AM |
3673 | return 4; |
3674 | if (size == 64 || !parameters->options().output_is_position_independent()) | |
3675 | return 16; | |
3676 | return 32; | |
3677 | } | |
3678 | ||
3679 | // Write out stubs. | |
cf43a2fe AM |
3680 | void |
3681 | do_write(Output_file*); | |
3682 | ||
ec661b9d AM |
3683 | // Plt call stub keys. |
3684 | class Plt_stub_ent | |
cf43a2fe | 3685 | { |
d1a8cabd | 3686 | public: |
ec661b9d | 3687 | Plt_stub_ent(const Symbol* sym) |
c9824451 AM |
3688 | : sym_(sym), object_(0), addend_(0), locsym_(0) |
3689 | { } | |
3690 | ||
ec661b9d AM |
3691 | Plt_stub_ent(const Sized_relobj_file<size, big_endian>* object, |
3692 | unsigned int locsym_index) | |
c9824451 AM |
3693 | : sym_(NULL), object_(object), addend_(0), locsym_(locsym_index) |
3694 | { } | |
3695 | ||
ec661b9d AM |
3696 | Plt_stub_ent(const Sized_relobj_file<size, big_endian>* object, |
3697 | const Symbol* sym, | |
3698 | unsigned int r_type, | |
3699 | Address addend) | |
e5d5f5ed | 3700 | : sym_(sym), object_(0), addend_(0), locsym_(0) |
cf43a2fe AM |
3701 | { |
3702 | if (size != 32) | |
ec661b9d | 3703 | this->addend_ = addend; |
d1a8cabd | 3704 | else if (parameters->options().output_is_position_independent() |
ec661b9d | 3705 | && r_type == elfcpp::R_PPC_PLTREL24) |
cf43a2fe | 3706 | { |
ec661b9d | 3707 | this->addend_ = addend; |
e5d5f5ed | 3708 | if (this->addend_ >= 32768) |
d1a8cabd | 3709 | this->object_ = object; |
cf43a2fe AM |
3710 | } |
3711 | } | |
3712 | ||
ec661b9d AM |
3713 | Plt_stub_ent(const Sized_relobj_file<size, big_endian>* object, |
3714 | unsigned int locsym_index, | |
3715 | unsigned int r_type, | |
3716 | Address addend) | |
e5d5f5ed AM |
3717 | : sym_(NULL), object_(object), addend_(0), locsym_(locsym_index) |
3718 | { | |
3719 | if (size != 32) | |
ec661b9d | 3720 | this->addend_ = addend; |
e5d5f5ed | 3721 | else if (parameters->options().output_is_position_independent() |
ec661b9d AM |
3722 | && r_type == elfcpp::R_PPC_PLTREL24) |
3723 | this->addend_ = addend; | |
e5d5f5ed AM |
3724 | } |
3725 | ||
ec661b9d | 3726 | bool operator==(const Plt_stub_ent& that) const |
cf43a2fe AM |
3727 | { |
3728 | return (this->sym_ == that.sym_ | |
3729 | && this->object_ == that.object_ | |
e5d5f5ed AM |
3730 | && this->addend_ == that.addend_ |
3731 | && this->locsym_ == that.locsym_); | |
cf43a2fe | 3732 | } |
c9269dff AM |
3733 | |
3734 | const Symbol* sym_; | |
e5d5f5ed AM |
3735 | const Sized_relobj_file<size, big_endian>* object_; |
3736 | typename elfcpp::Elf_types<size>::Elf_Addr addend_; | |
3737 | unsigned int locsym_; | |
cf43a2fe AM |
3738 | }; |
3739 | ||
ec661b9d | 3740 | class Plt_stub_ent_hash |
cf43a2fe | 3741 | { |
d1a8cabd | 3742 | public: |
ec661b9d | 3743 | size_t operator()(const Plt_stub_ent& ent) const |
cf43a2fe AM |
3744 | { |
3745 | return (reinterpret_cast<uintptr_t>(ent.sym_) | |
3746 | ^ reinterpret_cast<uintptr_t>(ent.object_) | |
e5d5f5ed AM |
3747 | ^ ent.addend_ |
3748 | ^ ent.locsym_); | |
cf43a2fe | 3749 | } |
ec661b9d AM |
3750 | }; |
3751 | ||
3752 | // Long branch stub keys. | |
3753 | class Branch_stub_ent | |
3754 | { | |
3755 | public: | |
3756 | Branch_stub_ent(const Powerpc_relobj<size, big_endian>* obj, Address to) | |
3757 | : dest_(to), toc_base_off_(0) | |
3758 | { | |
3759 | if (size == 64) | |
3760 | toc_base_off_ = obj->toc_base_offset(); | |
3761 | } | |
3762 | ||
3763 | bool operator==(const Branch_stub_ent& that) const | |
3764 | { | |
3765 | return (this->dest_ == that.dest_ | |
3766 | && (size == 32 | |
3767 | || this->toc_base_off_ == that.toc_base_off_)); | |
3768 | } | |
cf43a2fe | 3769 | |
ec661b9d AM |
3770 | Address dest_; |
3771 | unsigned int toc_base_off_; | |
3772 | }; | |
cf43a2fe | 3773 | |
ec661b9d AM |
3774 | class Branch_stub_ent_hash |
3775 | { | |
3776 | public: | |
3777 | size_t operator()(const Branch_stub_ent& ent) const | |
3778 | { return ent.dest_ ^ ent.toc_base_off_; } | |
3779 | }; | |
cf43a2fe | 3780 | |
ec661b9d | 3781 | // In a sane world this would be a global. |
cf43a2fe | 3782 | Target_powerpc<size, big_endian>* targ_; |
ec661b9d | 3783 | // Map sym/object/addend to stub offset. |
ec661b9d AM |
3784 | Plt_stub_entries plt_call_stubs_; |
3785 | // Map destination address to stub offset. | |
3786 | typedef Unordered_map<Branch_stub_ent, unsigned int, | |
3787 | Branch_stub_ent_hash> Branch_stub_entries; | |
3788 | Branch_stub_entries long_branch_stubs_; | |
3789 | // size of input section | |
3790 | section_size_type orig_data_size_; | |
3791 | // size of stubs | |
9e69ed50 | 3792 | section_size_type plt_size_, last_plt_size_, branch_size_, last_branch_size_; |
9d5781f8 AM |
3793 | // Whether .eh_frame info has been created for this stub section. |
3794 | bool eh_frame_added_; | |
cf43a2fe AM |
3795 | }; |
3796 | ||
ec661b9d AM |
3797 | // Make a new stub table, and record. |
3798 | ||
3799 | template<int size, bool big_endian> | |
3800 | Stub_table<size, big_endian>* | |
3801 | Target_powerpc<size, big_endian>::new_stub_table() | |
3802 | { | |
3803 | Stub_table<size, big_endian>* stub_table | |
3804 | = new Stub_table<size, big_endian>(this); | |
3805 | this->stub_tables_.push_back(stub_table); | |
3806 | return stub_table; | |
3807 | } | |
3808 | ||
3809 | // Delayed stub table initialisation, because we create the stub table | |
3810 | // before we know to which section it will be attached. | |
cf43a2fe AM |
3811 | |
3812 | template<int size, bool big_endian> | |
ec661b9d AM |
3813 | void |
3814 | Stub_table<size, big_endian>::init( | |
3815 | const Output_section::Input_section* owner, | |
3816 | Output_section* output_section) | |
cf43a2fe | 3817 | { |
ec661b9d AM |
3818 | this->set_relobj(owner->relobj()); |
3819 | this->set_shndx(owner->shndx()); | |
3820 | this->set_addralign(this->relobj()->section_addralign(this->shndx())); | |
3821 | this->set_output_section(output_section); | |
3822 | this->orig_data_size_ = owner->current_data_size(); | |
3823 | ||
3824 | std::vector<Output_relaxed_input_section*> new_relaxed; | |
3825 | new_relaxed.push_back(this); | |
3826 | output_section->convert_input_sections_to_relaxed_sections(new_relaxed); | |
cf43a2fe AM |
3827 | } |
3828 | ||
ec661b9d | 3829 | // Add a plt call stub, if we do not already have one for this |
d1a8cabd | 3830 | // sym/object/addend combo. |
cf43a2fe AM |
3831 | |
3832 | template<int size, bool big_endian> | |
3833 | void | |
ec661b9d | 3834 | Stub_table<size, big_endian>::add_plt_call_entry( |
c9824451 | 3835 | const Sized_relobj_file<size, big_endian>* object, |
d83ce4e3 | 3836 | const Symbol* gsym, |
ec661b9d AM |
3837 | unsigned int r_type, |
3838 | Address addend) | |
cf43a2fe | 3839 | { |
ec661b9d | 3840 | Plt_stub_ent ent(object, gsym, r_type, addend); |
9055360d | 3841 | unsigned int off = this->plt_size_; |
9e69ed50 AM |
3842 | std::pair<typename Plt_stub_entries::iterator, bool> p |
3843 | = this->plt_call_stubs_.insert(std::make_pair(ent, off)); | |
3844 | if (p.second) | |
3845 | this->plt_size_ = off + this->plt_call_size(p.first); | |
cf43a2fe AM |
3846 | } |
3847 | ||
e5d5f5ed AM |
3848 | template<int size, bool big_endian> |
3849 | void | |
ec661b9d | 3850 | Stub_table<size, big_endian>::add_plt_call_entry( |
c9824451 | 3851 | const Sized_relobj_file<size, big_endian>* object, |
e5d5f5ed | 3852 | unsigned int locsym_index, |
ec661b9d AM |
3853 | unsigned int r_type, |
3854 | Address addend) | |
e5d5f5ed | 3855 | { |
ec661b9d | 3856 | Plt_stub_ent ent(object, locsym_index, r_type, addend); |
9055360d | 3857 | unsigned int off = this->plt_size_; |
9e69ed50 AM |
3858 | std::pair<typename Plt_stub_entries::iterator, bool> p |
3859 | = this->plt_call_stubs_.insert(std::make_pair(ent, off)); | |
3860 | if (p.second) | |
3861 | this->plt_size_ = off + this->plt_call_size(p.first); | |
e5d5f5ed AM |
3862 | } |
3863 | ||
ec661b9d AM |
3864 | // Find a plt call stub. |
3865 | ||
cf43a2fe | 3866 | template<int size, bool big_endian> |
ec5b8187 | 3867 | typename Stub_table<size, big_endian>::Address |
ec661b9d | 3868 | Stub_table<size, big_endian>::find_plt_call_entry( |
c9824451 | 3869 | const Sized_relobj_file<size, big_endian>* object, |
d83ce4e3 | 3870 | const Symbol* gsym, |
ec661b9d AM |
3871 | unsigned int r_type, |
3872 | Address addend) const | |
c9824451 | 3873 | { |
ec661b9d AM |
3874 | Plt_stub_ent ent(object, gsym, r_type, addend); |
3875 | typename Plt_stub_entries::const_iterator p = this->plt_call_stubs_.find(ent); | |
3876 | return p == this->plt_call_stubs_.end() ? invalid_address : p->second; | |
c9824451 AM |
3877 | } |
3878 | ||
3879 | template<int size, bool big_endian> | |
ec5b8187 | 3880 | typename Stub_table<size, big_endian>::Address |
ec661b9d | 3881 | Stub_table<size, big_endian>::find_plt_call_entry(const Symbol* gsym) const |
cf43a2fe | 3882 | { |
ec661b9d AM |
3883 | Plt_stub_ent ent(gsym); |
3884 | typename Plt_stub_entries::const_iterator p = this->plt_call_stubs_.find(ent); | |
3885 | return p == this->plt_call_stubs_.end() ? invalid_address : p->second; | |
cf43a2fe AM |
3886 | } |
3887 | ||
e5d5f5ed | 3888 | template<int size, bool big_endian> |
ec5b8187 | 3889 | typename Stub_table<size, big_endian>::Address |
ec661b9d | 3890 | Stub_table<size, big_endian>::find_plt_call_entry( |
c9824451 | 3891 | const Sized_relobj_file<size, big_endian>* object, |
e5d5f5ed | 3892 | unsigned int locsym_index, |
ec661b9d AM |
3893 | unsigned int r_type, |
3894 | Address addend) const | |
e5d5f5ed | 3895 | { |
ec661b9d AM |
3896 | Plt_stub_ent ent(object, locsym_index, r_type, addend); |
3897 | typename Plt_stub_entries::const_iterator p = this->plt_call_stubs_.find(ent); | |
3898 | return p == this->plt_call_stubs_.end() ? invalid_address : p->second; | |
c9824451 AM |
3899 | } |
3900 | ||
3901 | template<int size, bool big_endian> | |
ec5b8187 | 3902 | typename Stub_table<size, big_endian>::Address |
ec661b9d | 3903 | Stub_table<size, big_endian>::find_plt_call_entry( |
c9824451 AM |
3904 | const Sized_relobj_file<size, big_endian>* object, |
3905 | unsigned int locsym_index) const | |
3906 | { | |
ec661b9d AM |
3907 | Plt_stub_ent ent(object, locsym_index); |
3908 | typename Plt_stub_entries::const_iterator p = this->plt_call_stubs_.find(ent); | |
3909 | return p == this->plt_call_stubs_.end() ? invalid_address : p->second; | |
3910 | } | |
3911 | ||
3912 | // Add a long branch stub if we don't already have one to given | |
3913 | // destination. | |
3914 | ||
3915 | template<int size, bool big_endian> | |
3916 | void | |
3917 | Stub_table<size, big_endian>::add_long_branch_entry( | |
3918 | const Powerpc_relobj<size, big_endian>* object, | |
3919 | Address to) | |
3920 | { | |
3921 | Branch_stub_ent ent(object, to); | |
3922 | Address off = this->branch_size_; | |
3923 | if (this->long_branch_stubs_.insert(std::make_pair(ent, off)).second) | |
3924 | { | |
3925 | unsigned int stub_size = this->branch_stub_size(to); | |
3926 | this->branch_size_ = off + stub_size; | |
3927 | if (size == 64 && stub_size != 4) | |
3928 | this->targ_->add_branch_lookup_table(to); | |
3929 | } | |
3930 | } | |
3931 | ||
3932 | // Find long branch stub. | |
3933 | ||
3934 | template<int size, bool big_endian> | |
ec5b8187 | 3935 | typename Stub_table<size, big_endian>::Address |
ec661b9d AM |
3936 | Stub_table<size, big_endian>::find_long_branch_entry( |
3937 | const Powerpc_relobj<size, big_endian>* object, | |
9d5781f8 | 3938 | Address to) const |
ec661b9d AM |
3939 | { |
3940 | Branch_stub_ent ent(object, to); | |
3941 | typename Branch_stub_entries::const_iterator p | |
3942 | = this->long_branch_stubs_.find(ent); | |
3943 | return p == this->long_branch_stubs_.end() ? invalid_address : p->second; | |
e5d5f5ed AM |
3944 | } |
3945 | ||
ec661b9d AM |
3946 | // A class to handle .glink. |
3947 | ||
3948 | template<int size, bool big_endian> | |
3949 | class Output_data_glink : public Output_section_data | |
3950 | { | |
3951 | public: | |
9055360d AM |
3952 | typedef typename elfcpp::Elf_types<size>::Elf_Addr Address; |
3953 | static const Address invalid_address = static_cast<Address>(0) - 1; | |
ec661b9d AM |
3954 | static const int pltresolve_size = 16*4; |
3955 | ||
3956 | Output_data_glink(Target_powerpc<size, big_endian>* targ) | |
9055360d AM |
3957 | : Output_section_data(16), targ_(targ), global_entry_stubs_(), |
3958 | end_branch_table_(), ge_size_(0) | |
ec661b9d AM |
3959 | { } |
3960 | ||
9d5781f8 | 3961 | void |
9055360d | 3962 | add_eh_frame(Layout* layout); |
9d5781f8 | 3963 | |
9055360d AM |
3964 | void |
3965 | add_global_entry(const Symbol*); | |
3966 | ||
3967 | Address | |
3968 | find_global_entry(const Symbol*) const; | |
3969 | ||
3970 | Address | |
3971 | global_entry_address() const | |
3972 | { | |
3973 | gold_assert(this->is_data_size_valid()); | |
3974 | unsigned int global_entry_off = (this->end_branch_table_ + 15) & -16; | |
3975 | return this->address() + global_entry_off; | |
9d5781f8 AM |
3976 | } |
3977 | ||
ec661b9d AM |
3978 | protected: |
3979 | // Write to a map file. | |
3980 | void | |
3981 | do_print_to_mapfile(Mapfile* mapfile) const | |
3982 | { mapfile->print_output_data(this, _("** glink")); } | |
3983 | ||
3984 | private: | |
3985 | void | |
3986 | set_final_data_size(); | |
3987 | ||
3988 | // Write out .glink | |
3989 | void | |
3990 | do_write(Output_file*); | |
3991 | ||
3992 | // Allows access to .got and .plt for do_write. | |
3993 | Target_powerpc<size, big_endian>* targ_; | |
9055360d AM |
3994 | |
3995 | // Map sym to stub offset. | |
3996 | typedef Unordered_map<const Symbol*, unsigned int> Global_entry_stub_entries; | |
3997 | Global_entry_stub_entries global_entry_stubs_; | |
3998 | ||
3999 | unsigned int end_branch_table_, ge_size_; | |
ec661b9d AM |
4000 | }; |
4001 | ||
9055360d AM |
4002 | template<int size, bool big_endian> |
4003 | void | |
4004 | Output_data_glink<size, big_endian>::add_eh_frame(Layout* layout) | |
4005 | { | |
4006 | if (!parameters->options().ld_generated_unwind_info()) | |
4007 | return; | |
4008 | ||
4009 | if (size == 64) | |
4010 | { | |
4011 | if (this->targ_->abiversion() < 2) | |
4012 | layout->add_eh_frame_for_plt(this, | |
4013 | Eh_cie<64>::eh_frame_cie, | |
4014 | sizeof (Eh_cie<64>::eh_frame_cie), | |
4015 | glink_eh_frame_fde_64v1, | |
4016 | sizeof (glink_eh_frame_fde_64v1)); | |
4017 | else | |
4018 | layout->add_eh_frame_for_plt(this, | |
4019 | Eh_cie<64>::eh_frame_cie, | |
4020 | sizeof (Eh_cie<64>::eh_frame_cie), | |
4021 | glink_eh_frame_fde_64v2, | |
4022 | sizeof (glink_eh_frame_fde_64v2)); | |
4023 | } | |
4024 | else | |
4025 | { | |
4026 | // 32-bit .glink can use the default since the CIE return | |
4027 | // address reg, LR, is valid. | |
4028 | layout->add_eh_frame_for_plt(this, | |
4029 | Eh_cie<32>::eh_frame_cie, | |
4030 | sizeof (Eh_cie<32>::eh_frame_cie), | |
4031 | default_fde, | |
4032 | sizeof (default_fde)); | |
4033 | // Except where LR is used in a PIC __glink_PLTresolve. | |
4034 | if (parameters->options().output_is_position_independent()) | |
4035 | layout->add_eh_frame_for_plt(this, | |
4036 | Eh_cie<32>::eh_frame_cie, | |
4037 | sizeof (Eh_cie<32>::eh_frame_cie), | |
4038 | glink_eh_frame_fde_32, | |
4039 | sizeof (glink_eh_frame_fde_32)); | |
4040 | } | |
4041 | } | |
4042 | ||
4043 | template<int size, bool big_endian> | |
4044 | void | |
4045 | Output_data_glink<size, big_endian>::add_global_entry(const Symbol* gsym) | |
4046 | { | |
4047 | std::pair<typename Global_entry_stub_entries::iterator, bool> p | |
4048 | = this->global_entry_stubs_.insert(std::make_pair(gsym, this->ge_size_)); | |
4049 | if (p.second) | |
4050 | this->ge_size_ += 16; | |
4051 | } | |
4052 | ||
4053 | template<int size, bool big_endian> | |
4054 | typename Output_data_glink<size, big_endian>::Address | |
4055 | Output_data_glink<size, big_endian>::find_global_entry(const Symbol* gsym) const | |
4056 | { | |
4057 | typename Global_entry_stub_entries::const_iterator p | |
4058 | = this->global_entry_stubs_.find(gsym); | |
4059 | return p == this->global_entry_stubs_.end() ? invalid_address : p->second; | |
4060 | } | |
4061 | ||
cf43a2fe AM |
4062 | template<int size, bool big_endian> |
4063 | void | |
4064 | Output_data_glink<size, big_endian>::set_final_data_size() | |
4065 | { | |
ec661b9d AM |
4066 | unsigned int count = this->targ_->plt_entry_count(); |
4067 | section_size_type total = 0; | |
cf43a2fe AM |
4068 | |
4069 | if (count != 0) | |
4070 | { | |
4071 | if (size == 32) | |
4072 | { | |
cf43a2fe AM |
4073 | // space for branch table |
4074 | total += 4 * (count - 1); | |
4075 | ||
4076 | total += -total & 15; | |
4077 | total += this->pltresolve_size; | |
4078 | } | |
4079 | else | |
4080 | { | |
cf43a2fe AM |
4081 | total += this->pltresolve_size; |
4082 | ||
4083 | // space for branch table | |
b4f7960d AM |
4084 | total += 4 * count; |
4085 | if (this->targ_->abiversion() < 2) | |
4086 | { | |
4087 | total += 4 * count; | |
4088 | if (count > 0x8000) | |
4089 | total += 4 * (count - 0x8000); | |
4090 | } | |
cf43a2fe AM |
4091 | } |
4092 | } | |
9055360d AM |
4093 | this->end_branch_table_ = total; |
4094 | total = (total + 15) & -16; | |
4095 | total += this->ge_size_; | |
cf43a2fe AM |
4096 | |
4097 | this->set_data_size(total); | |
4098 | } | |
4099 | ||
ec661b9d | 4100 | // Write out plt and long branch stub code. |
cf43a2fe AM |
4101 | |
4102 | template<int size, bool big_endian> | |
4103 | void | |
ec661b9d | 4104 | Stub_table<size, big_endian>::do_write(Output_file* of) |
cf43a2fe | 4105 | { |
ec661b9d AM |
4106 | if (this->plt_call_stubs_.empty() |
4107 | && this->long_branch_stubs_.empty()) | |
4108 | return; | |
4109 | ||
4110 | const section_size_type start_off = this->offset(); | |
4111 | const section_size_type off = this->stub_offset(); | |
42cacb20 | 4112 | const section_size_type oview_size = |
ec661b9d | 4113 | convert_to_section_size_type(this->data_size() - (off - start_off)); |
cf43a2fe | 4114 | unsigned char* const oview = of->get_output_view(off, oview_size); |
c9269dff | 4115 | unsigned char* p; |
42cacb20 | 4116 | |
cf43a2fe AM |
4117 | if (size == 64) |
4118 | { | |
ec661b9d AM |
4119 | const Output_data_got_powerpc<size, big_endian>* got |
4120 | = this->targ_->got_section(); | |
dd93cd0a | 4121 | Address got_os_addr = got->output_section()->address(); |
c9269dff | 4122 | |
ec661b9d | 4123 | if (!this->plt_call_stubs_.empty()) |
cf43a2fe | 4124 | { |
ec661b9d AM |
4125 | // The base address of the .plt section. |
4126 | Address plt_base = this->targ_->plt_section()->address(); | |
4127 | Address iplt_base = invalid_address; | |
4128 | ||
4129 | // Write out plt call stubs. | |
4130 | typename Plt_stub_entries::const_iterator cs; | |
4131 | for (cs = this->plt_call_stubs_.begin(); | |
4132 | cs != this->plt_call_stubs_.end(); | |
4133 | ++cs) | |
e5d5f5ed | 4134 | { |
91c2b899 AM |
4135 | bool is_iplt; |
4136 | Address pltoff = this->plt_off(cs, &is_iplt); | |
9e69ed50 | 4137 | Address plt_addr = pltoff; |
91c2b899 | 4138 | if (is_iplt) |
ec661b9d AM |
4139 | { |
4140 | if (iplt_base == invalid_address) | |
4141 | iplt_base = this->targ_->iplt_section()->address(); | |
4142 | plt_addr += iplt_base; | |
4143 | } | |
4144 | else | |
4145 | plt_addr += plt_base; | |
4146 | const Powerpc_relobj<size, big_endian>* ppcobj = static_cast | |
4147 | <const Powerpc_relobj<size, big_endian>*>(cs->first.object_); | |
4148 | Address got_addr = got_os_addr + ppcobj->toc_base_offset(); | |
9e69ed50 | 4149 | Address off = plt_addr - got_addr; |
ec661b9d | 4150 | |
9e69ed50 | 4151 | if (off + 0x80008000 > 0xffffffff || (off & 7) != 0) |
ec661b9d AM |
4152 | gold_error(_("%s: linkage table error against `%s'"), |
4153 | cs->first.object_->name().c_str(), | |
4154 | cs->first.sym_->demangled_name().c_str()); | |
4155 | ||
b4f7960d AM |
4156 | bool plt_load_toc = this->targ_->abiversion() < 2; |
4157 | bool static_chain | |
4158 | = plt_load_toc && parameters->options().plt_static_chain(); | |
4159 | bool thread_safe | |
4160 | = plt_load_toc && this->targ_->plt_thread_safe(); | |
9e69ed50 AM |
4161 | bool use_fake_dep = false; |
4162 | Address cmp_branch_off = 0; | |
4163 | if (thread_safe) | |
4164 | { | |
4165 | unsigned int pltindex | |
4166 | = ((pltoff - this->targ_->first_plt_entry_offset()) | |
4167 | / this->targ_->plt_entry_size()); | |
4168 | Address glinkoff | |
4169 | = (this->targ_->glink_section()->pltresolve_size | |
4170 | + pltindex * 8); | |
4171 | if (pltindex > 32768) | |
4172 | glinkoff += (pltindex - 32768) * 4; | |
4173 | Address to | |
4174 | = this->targ_->glink_section()->address() + glinkoff; | |
4175 | Address from | |
4176 | = (this->stub_address() + cs->second + 24 | |
4177 | + 4 * (ha(off) != 0) | |
4178 | + 4 * (ha(off + 8 + 8 * static_chain) != ha(off)) | |
4179 | + 4 * static_chain); | |
4180 | cmp_branch_off = to - from; | |
4181 | use_fake_dep = cmp_branch_off + (1 << 25) >= (1 << 26); | |
4182 | } | |
4183 | ||
ec661b9d | 4184 | p = oview + cs->second; |
9e69ed50 | 4185 | if (ha(off) != 0) |
ec661b9d | 4186 | { |
b4f7960d AM |
4187 | write_insn<big_endian>(p, std_2_1 + this->targ_->stk_toc()); |
4188 | p += 4; | |
4189 | write_insn<big_endian>(p, addis_11_2 + ha(off)); | |
4190 | p += 4; | |
4191 | write_insn<big_endian>(p, ld_12_11 + l(off)); | |
4192 | p += 4; | |
4193 | if (plt_load_toc | |
4194 | && ha(off + 8 + 8 * static_chain) != ha(off)) | |
ec661b9d | 4195 | { |
b4f7960d AM |
4196 | write_insn<big_endian>(p, addi_11_11 + l(off)); |
4197 | p += 4; | |
9e69ed50 | 4198 | off = 0; |
ec661b9d | 4199 | } |
b4f7960d AM |
4200 | write_insn<big_endian>(p, mtctr_12); |
4201 | p += 4; | |
4202 | if (plt_load_toc) | |
9e69ed50 | 4203 | { |
b4f7960d AM |
4204 | if (use_fake_dep) |
4205 | { | |
4206 | write_insn<big_endian>(p, xor_2_12_12); | |
4207 | p += 4; | |
4208 | write_insn<big_endian>(p, add_11_11_2); | |
4209 | p += 4; | |
4210 | } | |
4211 | write_insn<big_endian>(p, ld_2_11 + l(off + 8)); | |
4212 | p += 4; | |
4213 | if (static_chain) | |
4214 | { | |
4215 | write_insn<big_endian>(p, ld_11_11 + l(off + 16)); | |
4216 | p += 4; | |
4217 | } | |
9e69ed50 | 4218 | } |
ec661b9d AM |
4219 | } |
4220 | else | |
4221 | { | |
b4f7960d AM |
4222 | write_insn<big_endian>(p, std_2_1 + this->targ_->stk_toc()); |
4223 | p += 4; | |
4224 | write_insn<big_endian>(p, ld_12_2 + l(off)); | |
4225 | p += 4; | |
4226 | if (plt_load_toc | |
4227 | && ha(off + 8 + 8 * static_chain) != ha(off)) | |
ec661b9d | 4228 | { |
b4f7960d AM |
4229 | write_insn<big_endian>(p, addi_2_2 + l(off)); |
4230 | p += 4; | |
9e69ed50 | 4231 | off = 0; |
ec661b9d | 4232 | } |
b4f7960d AM |
4233 | write_insn<big_endian>(p, mtctr_12); |
4234 | p += 4; | |
4235 | if (plt_load_toc) | |
9e69ed50 | 4236 | { |
b4f7960d AM |
4237 | if (use_fake_dep) |
4238 | { | |
4239 | write_insn<big_endian>(p, xor_11_12_12); | |
4240 | p += 4; | |
4241 | write_insn<big_endian>(p, add_2_2_11); | |
4242 | p += 4; | |
4243 | } | |
4244 | if (static_chain) | |
4245 | { | |
4246 | write_insn<big_endian>(p, ld_11_2 + l(off + 16)); | |
4247 | p += 4; | |
4248 | } | |
4249 | write_insn<big_endian>(p, ld_2_2 + l(off + 8)); | |
4250 | p += 4; | |
9e69ed50 | 4251 | } |
ec661b9d | 4252 | } |
9e69ed50 AM |
4253 | if (thread_safe && !use_fake_dep) |
4254 | { | |
b4f7960d AM |
4255 | write_insn<big_endian>(p, cmpldi_2_0); |
4256 | p += 4; | |
4257 | write_insn<big_endian>(p, bnectr_p4); | |
4258 | p += 4; | |
9e69ed50 AM |
4259 | write_insn<big_endian>(p, b | (cmp_branch_off & 0x3fffffc)); |
4260 | } | |
4261 | else | |
4262 | write_insn<big_endian>(p, bctr); | |
e5d5f5ed | 4263 | } |
ec661b9d AM |
4264 | } |
4265 | ||
4266 | // Write out long branch stubs. | |
4267 | typename Branch_stub_entries::const_iterator bs; | |
4268 | for (bs = this->long_branch_stubs_.begin(); | |
4269 | bs != this->long_branch_stubs_.end(); | |
4270 | ++bs) | |
4271 | { | |
4272 | p = oview + this->plt_size_ + bs->second; | |
4273 | Address loc = this->stub_address() + this->plt_size_ + bs->second; | |
4274 | Address delta = bs->first.dest_ - loc; | |
4275 | if (delta + (1 << 25) < 2 << 25) | |
4276 | write_insn<big_endian>(p, b | (delta & 0x3fffffc)); | |
e5d5f5ed | 4277 | else |
cf43a2fe | 4278 | { |
ec661b9d AM |
4279 | Address brlt_addr |
4280 | = this->targ_->find_branch_lookup_table(bs->first.dest_); | |
4281 | gold_assert(brlt_addr != invalid_address); | |
4282 | brlt_addr += this->targ_->brlt_section()->address(); | |
4283 | Address got_addr = got_os_addr + bs->first.toc_base_off_; | |
4284 | Address brltoff = brlt_addr - got_addr; | |
4285 | if (ha(brltoff) == 0) | |
4286 | { | |
b4f7960d | 4287 | write_insn<big_endian>(p, ld_12_2 + l(brltoff)), p += 4; |
ec661b9d AM |
4288 | } |
4289 | else | |
cf43a2fe | 4290 | { |
b4f7960d AM |
4291 | write_insn<big_endian>(p, addis_11_2 + ha(brltoff)), p += 4; |
4292 | write_insn<big_endian>(p, ld_12_11 + l(brltoff)), p += 4; | |
cf43a2fe | 4293 | } |
b4f7960d | 4294 | write_insn<big_endian>(p, mtctr_12), p += 4; |
ec661b9d | 4295 | write_insn<big_endian>(p, bctr); |
cf43a2fe | 4296 | } |
ec661b9d AM |
4297 | } |
4298 | } | |
4299 | else | |
4300 | { | |
4301 | if (!this->plt_call_stubs_.empty()) | |
4302 | { | |
4303 | // The base address of the .plt section. | |
4304 | Address plt_base = this->targ_->plt_section()->address(); | |
4305 | Address iplt_base = invalid_address; | |
4306 | // The address of _GLOBAL_OFFSET_TABLE_. | |
4307 | Address g_o_t = invalid_address; | |
4308 | ||
4309 | // Write out plt call stubs. | |
4310 | typename Plt_stub_entries::const_iterator cs; | |
4311 | for (cs = this->plt_call_stubs_.begin(); | |
4312 | cs != this->plt_call_stubs_.end(); | |
4313 | ++cs) | |
cf43a2fe | 4314 | { |
91c2b899 AM |
4315 | bool is_iplt; |
4316 | Address plt_addr = this->plt_off(cs, &is_iplt); | |
4317 | if (is_iplt) | |
ec661b9d AM |
4318 | { |
4319 | if (iplt_base == invalid_address) | |
4320 | iplt_base = this->targ_->iplt_section()->address(); | |
4321 | plt_addr += iplt_base; | |
4322 | } | |
4323 | else | |
4324 | plt_addr += plt_base; | |
4325 | ||
4326 | p = oview + cs->second; | |
4327 | if (parameters->options().output_is_position_independent()) | |
4328 | { | |
4329 | Address got_addr; | |
4330 | const Powerpc_relobj<size, big_endian>* ppcobj | |
4331 | = (static_cast<const Powerpc_relobj<size, big_endian>*> | |
4332 | (cs->first.object_)); | |
4333 | if (ppcobj != NULL && cs->first.addend_ >= 32768) | |
4334 | { | |
4335 | unsigned int got2 = ppcobj->got2_shndx(); | |
4336 | got_addr = ppcobj->get_output_section_offset(got2); | |
4337 | gold_assert(got_addr != invalid_address); | |
4338 | got_addr += (ppcobj->output_section(got2)->address() | |
4339 | + cs->first.addend_); | |
4340 | } | |
4341 | else | |
4342 | { | |
4343 | if (g_o_t == invalid_address) | |
4344 | { | |
4345 | const Output_data_got_powerpc<size, big_endian>* got | |
4346 | = this->targ_->got_section(); | |
4347 | g_o_t = got->address() + got->g_o_t(); | |
4348 | } | |
4349 | got_addr = g_o_t; | |
4350 | } | |
4351 | ||
9e69ed50 AM |
4352 | Address off = plt_addr - got_addr; |
4353 | if (ha(off) == 0) | |
ec661b9d | 4354 | { |
9e69ed50 | 4355 | write_insn<big_endian>(p + 0, lwz_11_30 + l(off)); |
ec661b9d AM |
4356 | write_insn<big_endian>(p + 4, mtctr_11); |
4357 | write_insn<big_endian>(p + 8, bctr); | |
4358 | } | |
4359 | else | |
4360 | { | |
9e69ed50 AM |
4361 | write_insn<big_endian>(p + 0, addis_11_30 + ha(off)); |
4362 | write_insn<big_endian>(p + 4, lwz_11_11 + l(off)); | |
ec661b9d AM |
4363 | write_insn<big_endian>(p + 8, mtctr_11); |
4364 | write_insn<big_endian>(p + 12, bctr); | |
4365 | } | |
4366 | } | |
4367 | else | |
4368 | { | |
4369 | write_insn<big_endian>(p + 0, lis_11 + ha(plt_addr)); | |
4370 | write_insn<big_endian>(p + 4, lwz_11_11 + l(plt_addr)); | |
4371 | write_insn<big_endian>(p + 8, mtctr_11); | |
4372 | write_insn<big_endian>(p + 12, bctr); | |
4373 | } | |
4374 | } | |
4375 | } | |
4376 | ||
4377 | // Write out long branch stubs. | |
4378 | typename Branch_stub_entries::const_iterator bs; | |
4379 | for (bs = this->long_branch_stubs_.begin(); | |
4380 | bs != this->long_branch_stubs_.end(); | |
4381 | ++bs) | |
4382 | { | |
4383 | p = oview + this->plt_size_ + bs->second; | |
4384 | Address loc = this->stub_address() + this->plt_size_ + bs->second; | |
4385 | Address delta = bs->first.dest_ - loc; | |
4386 | if (delta + (1 << 25) < 2 << 25) | |
4387 | write_insn<big_endian>(p, b | (delta & 0x3fffffc)); | |
4388 | else if (!parameters->options().output_is_position_independent()) | |
4389 | { | |
4390 | write_insn<big_endian>(p + 0, lis_12 + ha(bs->first.dest_)); | |
4391 | write_insn<big_endian>(p + 4, addi_12_12 + l(bs->first.dest_)); | |
4392 | write_insn<big_endian>(p + 8, mtctr_12); | |
4393 | write_insn<big_endian>(p + 12, bctr); | |
4394 | } | |
4395 | else | |
4396 | { | |
4397 | delta -= 8; | |
4398 | write_insn<big_endian>(p + 0, mflr_0); | |
4399 | write_insn<big_endian>(p + 4, bcl_20_31); | |
4400 | write_insn<big_endian>(p + 8, mflr_12); | |
4401 | write_insn<big_endian>(p + 12, addis_12_12 + ha(delta)); | |
4402 | write_insn<big_endian>(p + 16, addi_12_12 + l(delta)); | |
4403 | write_insn<big_endian>(p + 20, mtlr_0); | |
4404 | write_insn<big_endian>(p + 24, mtctr_12); | |
4405 | write_insn<big_endian>(p + 28, bctr); | |
cf43a2fe AM |
4406 | } |
4407 | } | |
ec661b9d AM |
4408 | } |
4409 | } | |
4410 | ||
4411 | // Write out .glink. | |
4412 | ||
4413 | template<int size, bool big_endian> | |
4414 | void | |
4415 | Output_data_glink<size, big_endian>::do_write(Output_file* of) | |
4416 | { | |
4417 | const section_size_type off = this->offset(); | |
4418 | const section_size_type oview_size = | |
4419 | convert_to_section_size_type(this->data_size()); | |
4420 | unsigned char* const oview = of->get_output_view(off, oview_size); | |
4421 | unsigned char* p; | |
4422 | ||
4423 | // The base address of the .plt section. | |
4424 | typedef typename elfcpp::Elf_types<size>::Elf_Addr Address; | |
4425 | Address plt_base = this->targ_->plt_section()->address(); | |
cf43a2fe | 4426 | |
ec661b9d AM |
4427 | if (size == 64) |
4428 | { | |
9055360d | 4429 | if (this->end_branch_table_ != 0) |
b4f7960d | 4430 | { |
9055360d AM |
4431 | // Write pltresolve stub. |
4432 | p = oview; | |
4433 | Address after_bcl = this->address() + 16; | |
4434 | Address pltoff = plt_base - after_bcl; | |
4435 | ||
4436 | elfcpp::Swap<64, big_endian>::writeval(p, pltoff), p += 8; | |
cf43a2fe | 4437 | |
b4f7960d | 4438 | if (this->targ_->abiversion() < 2) |
cf43a2fe | 4439 | { |
9055360d AM |
4440 | write_insn<big_endian>(p, mflr_12), p += 4; |
4441 | write_insn<big_endian>(p, bcl_20_31), p += 4; | |
4442 | write_insn<big_endian>(p, mflr_11), p += 4; | |
4443 | write_insn<big_endian>(p, ld_2_11 + l(-16)), p += 4; | |
4444 | write_insn<big_endian>(p, mtlr_12), p += 4; | |
4445 | write_insn<big_endian>(p, add_11_2_11), p += 4; | |
4446 | write_insn<big_endian>(p, ld_12_11 + 0), p += 4; | |
4447 | write_insn<big_endian>(p, ld_2_11 + 8), p += 4; | |
4448 | write_insn<big_endian>(p, mtctr_12), p += 4; | |
4449 | write_insn<big_endian>(p, ld_11_11 + 16), p += 4; | |
4450 | } | |
4451 | else | |
4452 | { | |
4453 | write_insn<big_endian>(p, mflr_0), p += 4; | |
4454 | write_insn<big_endian>(p, bcl_20_31), p += 4; | |
4455 | write_insn<big_endian>(p, mflr_11), p += 4; | |
4456 | write_insn<big_endian>(p, ld_2_11 + l(-16)), p += 4; | |
4457 | write_insn<big_endian>(p, mtlr_0), p += 4; | |
4458 | write_insn<big_endian>(p, sub_12_12_11), p += 4; | |
4459 | write_insn<big_endian>(p, add_11_2_11), p += 4; | |
4460 | write_insn<big_endian>(p, addi_0_12 + l(-48)), p += 4; | |
4461 | write_insn<big_endian>(p, ld_12_11 + 0), p += 4; | |
4462 | write_insn<big_endian>(p, srdi_0_0_2), p += 4; | |
4463 | write_insn<big_endian>(p, mtctr_12), p += 4; | |
4464 | write_insn<big_endian>(p, ld_11_11 + 8), p += 4; | |
4465 | } | |
4466 | write_insn<big_endian>(p, bctr), p += 4; | |
4467 | while (p < oview + this->pltresolve_size) | |
4468 | write_insn<big_endian>(p, nop), p += 4; | |
4469 | ||
4470 | // Write lazy link call stubs. | |
4471 | uint32_t indx = 0; | |
4472 | while (p < oview + this->end_branch_table_) | |
4473 | { | |
4474 | if (this->targ_->abiversion() < 2) | |
b4f7960d | 4475 | { |
9055360d AM |
4476 | if (indx < 0x8000) |
4477 | { | |
4478 | write_insn<big_endian>(p, li_0_0 + indx), p += 4; | |
4479 | } | |
4480 | else | |
4481 | { | |
4482 | write_insn<big_endian>(p, lis_0_0 + hi(indx)), p += 4; | |
4483 | write_insn<big_endian>(p, ori_0_0_0 + l(indx)), p += 4; | |
4484 | } | |
b4f7960d | 4485 | } |
9055360d AM |
4486 | uint32_t branch_off = 8 - (p - oview); |
4487 | write_insn<big_endian>(p, b + (branch_off & 0x3fffffc)), p += 4; | |
4488 | indx++; | |
cf43a2fe | 4489 | } |
9055360d AM |
4490 | } |
4491 | ||
4492 | Address plt_base = this->targ_->plt_section()->address(); | |
4493 | Address iplt_base = invalid_address; | |
4494 | unsigned int global_entry_off = (this->end_branch_table_ + 15) & -16; | |
4495 | Address global_entry_base = this->address() + global_entry_off; | |
4496 | typename Global_entry_stub_entries::const_iterator ge; | |
4497 | for (ge = this->global_entry_stubs_.begin(); | |
4498 | ge != this->global_entry_stubs_.end(); | |
4499 | ++ge) | |
4500 | { | |
4501 | p = oview + global_entry_off + ge->second; | |
4502 | Address plt_addr = ge->first->plt_offset(); | |
4503 | if (ge->first->type() == elfcpp::STT_GNU_IFUNC | |
4504 | && ge->first->can_use_relative_reloc(false)) | |
4505 | { | |
4506 | if (iplt_base == invalid_address) | |
4507 | iplt_base = this->targ_->iplt_section()->address(); | |
4508 | plt_addr += iplt_base; | |
4509 | } | |
4510 | else | |
4511 | plt_addr += plt_base; | |
4512 | Address my_addr = global_entry_base + ge->second; | |
4513 | Address off = plt_addr - my_addr; | |
4514 | ||
4515 | if (off + 0x80008000 > 0xffffffff || (off & 3) != 0) | |
4516 | gold_error(_("%s: linkage table error against `%s'"), | |
4517 | ge->first->object()->name().c_str(), | |
4518 | ge->first->demangled_name().c_str()); | |
4519 | ||
4520 | write_insn<big_endian>(p, addis_12_12 + ha(off)), p += 4; | |
4521 | write_insn<big_endian>(p, ld_12_12 + l(off)), p += 4; | |
4522 | write_insn<big_endian>(p, mtctr_12), p += 4; | |
4523 | write_insn<big_endian>(p, bctr); | |
cf43a2fe AM |
4524 | } |
4525 | } | |
4526 | else | |
4527 | { | |
ec661b9d AM |
4528 | const Output_data_got_powerpc<size, big_endian>* got |
4529 | = this->targ_->got_section(); | |
dd93cd0a AM |
4530 | // The address of _GLOBAL_OFFSET_TABLE_. |
4531 | Address g_o_t = got->address() + got->g_o_t(); | |
c9269dff | 4532 | |
cf43a2fe | 4533 | // Write out pltresolve branch table. |
ec661b9d | 4534 | p = oview; |
cf43a2fe | 4535 | unsigned int the_end = oview_size - this->pltresolve_size; |
c9269dff | 4536 | unsigned char* end_p = oview + the_end; |
cf43a2fe AM |
4537 | while (p < end_p - 8 * 4) |
4538 | write_insn<big_endian>(p, b + end_p - p), p += 4; | |
4539 | while (p < end_p) | |
4540 | write_insn<big_endian>(p, nop), p += 4; | |
42cacb20 | 4541 | |
cf43a2fe AM |
4542 | // Write out pltresolve call stub. |
4543 | if (parameters->options().output_is_position_independent()) | |
42cacb20 | 4544 | { |
ec661b9d | 4545 | Address res0_off = 0; |
dd93cd0a AM |
4546 | Address after_bcl_off = the_end + 12; |
4547 | Address bcl_res0 = after_bcl_off - res0_off; | |
cf43a2fe AM |
4548 | |
4549 | write_insn<big_endian>(p + 0, addis_11_11 + ha(bcl_res0)); | |
4550 | write_insn<big_endian>(p + 4, mflr_0); | |
4551 | write_insn<big_endian>(p + 8, bcl_20_31); | |
4552 | write_insn<big_endian>(p + 12, addi_11_11 + l(bcl_res0)); | |
4553 | write_insn<big_endian>(p + 16, mflr_12); | |
4554 | write_insn<big_endian>(p + 20, mtlr_0); | |
4555 | write_insn<big_endian>(p + 24, sub_11_11_12); | |
4556 | ||
dd93cd0a | 4557 | Address got_bcl = g_o_t + 4 - (after_bcl_off + this->address()); |
cf43a2fe AM |
4558 | |
4559 | write_insn<big_endian>(p + 28, addis_12_12 + ha(got_bcl)); | |
4560 | if (ha(got_bcl) == ha(got_bcl + 4)) | |
4561 | { | |
4562 | write_insn<big_endian>(p + 32, lwz_0_12 + l(got_bcl)); | |
4563 | write_insn<big_endian>(p + 36, lwz_12_12 + l(got_bcl + 4)); | |
4564 | } | |
4565 | else | |
4566 | { | |
4567 | write_insn<big_endian>(p + 32, lwzu_0_12 + l(got_bcl)); | |
4568 | write_insn<big_endian>(p + 36, lwz_12_12 + 4); | |
4569 | } | |
4570 | write_insn<big_endian>(p + 40, mtctr_0); | |
4571 | write_insn<big_endian>(p + 44, add_0_11_11); | |
4572 | write_insn<big_endian>(p + 48, add_11_0_11); | |
4573 | write_insn<big_endian>(p + 52, bctr); | |
4574 | write_insn<big_endian>(p + 56, nop); | |
4575 | write_insn<big_endian>(p + 60, nop); | |
42cacb20 | 4576 | } |
cf43a2fe | 4577 | else |
42cacb20 | 4578 | { |
ec661b9d | 4579 | Address res0 = this->address(); |
cf43a2fe AM |
4580 | |
4581 | write_insn<big_endian>(p + 0, lis_12 + ha(g_o_t + 4)); | |
4582 | write_insn<big_endian>(p + 4, addis_11_11 + ha(-res0)); | |
4583 | if (ha(g_o_t + 4) == ha(g_o_t + 8)) | |
4584 | write_insn<big_endian>(p + 8, lwz_0_12 + l(g_o_t + 4)); | |
4585 | else | |
4586 | write_insn<big_endian>(p + 8, lwzu_0_12 + l(g_o_t + 4)); | |
4587 | write_insn<big_endian>(p + 12, addi_11_11 + l(-res0)); | |
4588 | write_insn<big_endian>(p + 16, mtctr_0); | |
4589 | write_insn<big_endian>(p + 20, add_0_11_11); | |
4590 | if (ha(g_o_t + 4) == ha(g_o_t + 8)) | |
4591 | write_insn<big_endian>(p + 24, lwz_12_12 + l(g_o_t + 8)); | |
4592 | else | |
4593 | write_insn<big_endian>(p + 24, lwz_12_12 + 4); | |
4594 | write_insn<big_endian>(p + 28, add_11_0_11); | |
4595 | write_insn<big_endian>(p + 32, bctr); | |
4596 | write_insn<big_endian>(p + 36, nop); | |
4597 | write_insn<big_endian>(p + 40, nop); | |
4598 | write_insn<big_endian>(p + 44, nop); | |
4599 | write_insn<big_endian>(p + 48, nop); | |
4600 | write_insn<big_endian>(p + 52, nop); | |
4601 | write_insn<big_endian>(p + 56, nop); | |
4602 | write_insn<big_endian>(p + 60, nop); | |
42cacb20 | 4603 | } |
cf43a2fe | 4604 | p += 64; |
42cacb20 DE |
4605 | } |
4606 | ||
cf43a2fe AM |
4607 | of->write_output_view(off, oview_size, oview); |
4608 | } | |
4609 | ||
f3a0ed29 AM |
4610 | |
4611 | // A class to handle linker generated save/restore functions. | |
4612 | ||
4613 | template<int size, bool big_endian> | |
4614 | class Output_data_save_res : public Output_section_data_build | |
4615 | { | |
4616 | public: | |
4617 | Output_data_save_res(Symbol_table* symtab); | |
4618 | ||
4619 | protected: | |
4620 | // Write to a map file. | |
4621 | void | |
4622 | do_print_to_mapfile(Mapfile* mapfile) const | |
4623 | { mapfile->print_output_data(this, _("** save/restore")); } | |
4624 | ||
4625 | void | |
4626 | do_write(Output_file*); | |
4627 | ||
4628 | private: | |
4629 | // The maximum size of save/restore contents. | |
4630 | static const unsigned int savres_max = 218*4; | |
4631 | ||
4632 | void | |
4633 | savres_define(Symbol_table* symtab, | |
4634 | const char *name, | |
4635 | unsigned int lo, unsigned int hi, | |
4636 | unsigned char* write_ent(unsigned char*, int), | |
4637 | unsigned char* write_tail(unsigned char*, int)); | |
4638 | ||
4639 | unsigned char *contents_; | |
4640 | }; | |
4641 | ||
4642 | template<bool big_endian> | |
4643 | static unsigned char* | |
4644 | savegpr0(unsigned char* p, int r) | |
4645 | { | |
4646 | uint32_t insn = std_0_1 + (r << 21) + (1 << 16) - (32 - r) * 8; | |
4647 | write_insn<big_endian>(p, insn); | |
4648 | return p + 4; | |
4649 | } | |
4650 | ||
4651 | template<bool big_endian> | |
4652 | static unsigned char* | |
4653 | savegpr0_tail(unsigned char* p, int r) | |
4654 | { | |
4655 | p = savegpr0<big_endian>(p, r); | |
4656 | uint32_t insn = std_0_1 + 16; | |
4657 | write_insn<big_endian>(p, insn); | |
4658 | p = p + 4; | |
4659 | write_insn<big_endian>(p, blr); | |
4660 | return p + 4; | |
4661 | } | |
4662 | ||
4663 | template<bool big_endian> | |
62fe925a | 4664 | static unsigned char* |
f3a0ed29 AM |
4665 | restgpr0(unsigned char* p, int r) |
4666 | { | |
4667 | uint32_t insn = ld_0_1 + (r << 21) + (1 << 16) - (32 - r) * 8; | |
4668 | write_insn<big_endian>(p, insn); | |
4669 | return p + 4; | |
4670 | } | |
4671 | ||
4672 | template<bool big_endian> | |
62fe925a | 4673 | static unsigned char* |
f3a0ed29 AM |
4674 | restgpr0_tail(unsigned char* p, int r) |
4675 | { | |
4676 | uint32_t insn = ld_0_1 + 16; | |
4677 | write_insn<big_endian>(p, insn); | |
4678 | p = p + 4; | |
4679 | p = restgpr0<big_endian>(p, r); | |
4680 | write_insn<big_endian>(p, mtlr_0); | |
4681 | p = p + 4; | |
4682 | if (r == 29) | |
4683 | { | |
4684 | p = restgpr0<big_endian>(p, 30); | |
4685 | p = restgpr0<big_endian>(p, 31); | |
4686 | } | |
4687 | write_insn<big_endian>(p, blr); | |
4688 | return p + 4; | |
4689 | } | |
4690 | ||
4691 | template<bool big_endian> | |
62fe925a | 4692 | static unsigned char* |
f3a0ed29 AM |
4693 | savegpr1(unsigned char* p, int r) |
4694 | { | |
4695 | uint32_t insn = std_0_12 + (r << 21) + (1 << 16) - (32 - r) * 8; | |
4696 | write_insn<big_endian>(p, insn); | |
4697 | return p + 4; | |
4698 | } | |
4699 | ||
4700 | template<bool big_endian> | |
62fe925a | 4701 | static unsigned char* |
f3a0ed29 AM |
4702 | savegpr1_tail(unsigned char* p, int r) |
4703 | { | |
4704 | p = savegpr1<big_endian>(p, r); | |
4705 | write_insn<big_endian>(p, blr); | |
4706 | return p + 4; | |
4707 | } | |
4708 | ||
4709 | template<bool big_endian> | |
62fe925a | 4710 | static unsigned char* |
f3a0ed29 AM |
4711 | restgpr1(unsigned char* p, int r) |
4712 | { | |
4713 | uint32_t insn = ld_0_12 + (r << 21) + (1 << 16) - (32 - r) * 8; | |
4714 | write_insn<big_endian>(p, insn); | |
4715 | return p + 4; | |
4716 | } | |
4717 | ||
4718 | template<bool big_endian> | |
62fe925a | 4719 | static unsigned char* |
f3a0ed29 AM |
4720 | restgpr1_tail(unsigned char* p, int r) |
4721 | { | |
4722 | p = restgpr1<big_endian>(p, r); | |
4723 | write_insn<big_endian>(p, blr); | |
4724 | return p + 4; | |
4725 | } | |
4726 | ||
4727 | template<bool big_endian> | |
62fe925a | 4728 | static unsigned char* |
f3a0ed29 AM |
4729 | savefpr(unsigned char* p, int r) |
4730 | { | |
4731 | uint32_t insn = stfd_0_1 + (r << 21) + (1 << 16) - (32 - r) * 8; | |
4732 | write_insn<big_endian>(p, insn); | |
4733 | return p + 4; | |
4734 | } | |
4735 | ||
4736 | template<bool big_endian> | |
62fe925a | 4737 | static unsigned char* |
f3a0ed29 AM |
4738 | savefpr0_tail(unsigned char* p, int r) |
4739 | { | |
4740 | p = savefpr<big_endian>(p, r); | |
4741 | write_insn<big_endian>(p, std_0_1 + 16); | |
4742 | p = p + 4; | |
4743 | write_insn<big_endian>(p, blr); | |
4744 | return p + 4; | |
4745 | } | |
4746 | ||
4747 | template<bool big_endian> | |
62fe925a | 4748 | static unsigned char* |
f3a0ed29 AM |
4749 | restfpr(unsigned char* p, int r) |
4750 | { | |
4751 | uint32_t insn = lfd_0_1 + (r << 21) + (1 << 16) - (32 - r) * 8; | |
4752 | write_insn<big_endian>(p, insn); | |
4753 | return p + 4; | |
4754 | } | |
4755 | ||
4756 | template<bool big_endian> | |
62fe925a | 4757 | static unsigned char* |
f3a0ed29 AM |
4758 | restfpr0_tail(unsigned char* p, int r) |
4759 | { | |
4760 | write_insn<big_endian>(p, ld_0_1 + 16); | |
4761 | p = p + 4; | |
4762 | p = restfpr<big_endian>(p, r); | |
4763 | write_insn<big_endian>(p, mtlr_0); | |
4764 | p = p + 4; | |
4765 | if (r == 29) | |
4766 | { | |
4767 | p = restfpr<big_endian>(p, 30); | |
4768 | p = restfpr<big_endian>(p, 31); | |
4769 | } | |
4770 | write_insn<big_endian>(p, blr); | |
4771 | return p + 4; | |
4772 | } | |
4773 | ||
4774 | template<bool big_endian> | |
62fe925a | 4775 | static unsigned char* |
f3a0ed29 AM |
4776 | savefpr1_tail(unsigned char* p, int r) |
4777 | { | |
4778 | p = savefpr<big_endian>(p, r); | |
4779 | write_insn<big_endian>(p, blr); | |
4780 | return p + 4; | |
4781 | } | |
4782 | ||
4783 | template<bool big_endian> | |
62fe925a | 4784 | static unsigned char* |
f3a0ed29 AM |
4785 | restfpr1_tail(unsigned char* p, int r) |
4786 | { | |
4787 | p = restfpr<big_endian>(p, r); | |
4788 | write_insn<big_endian>(p, blr); | |
4789 | return p + 4; | |
4790 | } | |
4791 | ||
4792 | template<bool big_endian> | |
62fe925a | 4793 | static unsigned char* |
f3a0ed29 AM |
4794 | savevr(unsigned char* p, int r) |
4795 | { | |
4796 | uint32_t insn = li_12_0 + (1 << 16) - (32 - r) * 16; | |
4797 | write_insn<big_endian>(p, insn); | |
4798 | p = p + 4; | |
4799 | insn = stvx_0_12_0 + (r << 21); | |
4800 | write_insn<big_endian>(p, insn); | |
4801 | return p + 4; | |
4802 | } | |
4803 | ||
4804 | template<bool big_endian> | |
62fe925a | 4805 | static unsigned char* |
f3a0ed29 AM |
4806 | savevr_tail(unsigned char* p, int r) |
4807 | { | |
4808 | p = savevr<big_endian>(p, r); | |
4809 | write_insn<big_endian>(p, blr); | |
4810 | return p + 4; | |
4811 | } | |
4812 | ||
4813 | template<bool big_endian> | |
62fe925a | 4814 | static unsigned char* |
f3a0ed29 AM |
4815 | restvr(unsigned char* p, int r) |
4816 | { | |
4817 | uint32_t insn = li_12_0 + (1 << 16) - (32 - r) * 16; | |
4818 | write_insn<big_endian>(p, insn); | |
4819 | p = p + 4; | |
4820 | insn = lvx_0_12_0 + (r << 21); | |
4821 | write_insn<big_endian>(p, insn); | |
4822 | return p + 4; | |
4823 | } | |
4824 | ||
4825 | template<bool big_endian> | |
62fe925a | 4826 | static unsigned char* |
f3a0ed29 AM |
4827 | restvr_tail(unsigned char* p, int r) |
4828 | { | |
4829 | p = restvr<big_endian>(p, r); | |
4830 | write_insn<big_endian>(p, blr); | |
4831 | return p + 4; | |
4832 | } | |
4833 | ||
4834 | ||
4835 | template<int size, bool big_endian> | |
4836 | Output_data_save_res<size, big_endian>::Output_data_save_res( | |
4837 | Symbol_table* symtab) | |
4838 | : Output_section_data_build(4), | |
4839 | contents_(NULL) | |
4840 | { | |
4841 | this->savres_define(symtab, | |
4842 | "_savegpr0_", 14, 31, | |
4843 | savegpr0<big_endian>, savegpr0_tail<big_endian>); | |
4844 | this->savres_define(symtab, | |
4845 | "_restgpr0_", 14, 29, | |
4846 | restgpr0<big_endian>, restgpr0_tail<big_endian>); | |
4847 | this->savres_define(symtab, | |
4848 | "_restgpr0_", 30, 31, | |
4849 | restgpr0<big_endian>, restgpr0_tail<big_endian>); | |
4850 | this->savres_define(symtab, | |
4851 | "_savegpr1_", 14, 31, | |
4852 | savegpr1<big_endian>, savegpr1_tail<big_endian>); | |
4853 | this->savres_define(symtab, | |
4854 | "_restgpr1_", 14, 31, | |
4855 | restgpr1<big_endian>, restgpr1_tail<big_endian>); | |
4856 | this->savres_define(symtab, | |
4857 | "_savefpr_", 14, 31, | |
4858 | savefpr<big_endian>, savefpr0_tail<big_endian>); | |
4859 | this->savres_define(symtab, | |
4860 | "_restfpr_", 14, 29, | |
4861 | restfpr<big_endian>, restfpr0_tail<big_endian>); | |
4862 | this->savres_define(symtab, | |
4863 | "_restfpr_", 30, 31, | |
4864 | restfpr<big_endian>, restfpr0_tail<big_endian>); | |
4865 | this->savres_define(symtab, | |
4866 | "._savef", 14, 31, | |
4867 | savefpr<big_endian>, savefpr1_tail<big_endian>); | |
4868 | this->savres_define(symtab, | |
4869 | "._restf", 14, 31, | |
4870 | restfpr<big_endian>, restfpr1_tail<big_endian>); | |
4871 | this->savres_define(symtab, | |
4872 | "_savevr_", 20, 31, | |
4873 | savevr<big_endian>, savevr_tail<big_endian>); | |
4874 | this->savres_define(symtab, | |
4875 | "_restvr_", 20, 31, | |
4876 | restvr<big_endian>, restvr_tail<big_endian>); | |
4877 | } | |
4878 | ||
4879 | template<int size, bool big_endian> | |
4880 | void | |
4881 | Output_data_save_res<size, big_endian>::savres_define( | |
4882 | Symbol_table* symtab, | |
4883 | const char *name, | |
4884 | unsigned int lo, unsigned int hi, | |
4885 | unsigned char* write_ent(unsigned char*, int), | |
4886 | unsigned char* write_tail(unsigned char*, int)) | |
4887 | { | |
4888 | size_t len = strlen(name); | |
4889 | bool writing = false; | |
4890 | char sym[16]; | |
4891 | ||
4892 | memcpy(sym, name, len); | |
4893 | sym[len + 2] = 0; | |
4894 | ||
4895 | for (unsigned int i = lo; i <= hi; i++) | |
4896 | { | |
4897 | sym[len + 0] = i / 10 + '0'; | |
4898 | sym[len + 1] = i % 10 + '0'; | |
4899 | Symbol* gsym = symtab->lookup(sym); | |
4900 | bool refd = gsym != NULL && gsym->is_undefined(); | |
4901 | writing = writing || refd; | |
4902 | if (writing) | |
4903 | { | |
4904 | if (this->contents_ == NULL) | |
4905 | this->contents_ = new unsigned char[this->savres_max]; | |
4906 | ||
ec661b9d | 4907 | section_size_type value = this->current_data_size(); |
f3a0ed29 AM |
4908 | unsigned char* p = this->contents_ + value; |
4909 | if (i != hi) | |
4910 | p = write_ent(p, i); | |
4911 | else | |
4912 | p = write_tail(p, i); | |
ec661b9d | 4913 | section_size_type cur_size = p - this->contents_; |
f3a0ed29 AM |
4914 | this->set_current_data_size(cur_size); |
4915 | if (refd) | |
4916 | symtab->define_in_output_data(sym, NULL, Symbol_table::PREDEFINED, | |
4917 | this, value, cur_size - value, | |
4918 | elfcpp::STT_FUNC, elfcpp::STB_GLOBAL, | |
4919 | elfcpp::STV_HIDDEN, 0, false, false); | |
4920 | } | |
4921 | } | |
4922 | } | |
4923 | ||
4924 | // Write out save/restore. | |
4925 | ||
4926 | template<int size, bool big_endian> | |
4927 | void | |
4928 | Output_data_save_res<size, big_endian>::do_write(Output_file* of) | |
4929 | { | |
ec661b9d | 4930 | const section_size_type off = this->offset(); |
f3a0ed29 AM |
4931 | const section_size_type oview_size = |
4932 | convert_to_section_size_type(this->data_size()); | |
4933 | unsigned char* const oview = of->get_output_view(off, oview_size); | |
4934 | memcpy(oview, this->contents_, oview_size); | |
4935 | of->write_output_view(off, oview_size, oview); | |
4936 | } | |
4937 | ||
4938 | ||
cf43a2fe | 4939 | // Create the glink section. |
42cacb20 | 4940 | |
cf43a2fe AM |
4941 | template<int size, bool big_endian> |
4942 | void | |
4943 | Target_powerpc<size, big_endian>::make_glink_section(Layout* layout) | |
4944 | { | |
4945 | if (this->glink_ == NULL) | |
4946 | { | |
4947 | this->glink_ = new Output_data_glink<size, big_endian>(this); | |
9d5781f8 | 4948 | this->glink_->add_eh_frame(layout); |
cf43a2fe AM |
4949 | layout->add_output_section_data(".text", elfcpp::SHT_PROGBITS, |
4950 | elfcpp::SHF_ALLOC | elfcpp::SHF_EXECINSTR, | |
4951 | this->glink_, ORDER_TEXT, false); | |
4952 | } | |
42cacb20 DE |
4953 | } |
4954 | ||
4955 | // Create a PLT entry for a global symbol. | |
4956 | ||
4957 | template<int size, bool big_endian> | |
4958 | void | |
ec661b9d AM |
4959 | Target_powerpc<size, big_endian>::make_plt_entry(Symbol_table* symtab, |
4960 | Layout* layout, | |
4961 | Symbol* gsym) | |
42cacb20 | 4962 | { |
e5d5f5ed AM |
4963 | if (gsym->type() == elfcpp::STT_GNU_IFUNC |
4964 | && gsym->can_use_relative_reloc(false)) | |
4965 | { | |
4966 | if (this->iplt_ == NULL) | |
40b469d7 | 4967 | this->make_iplt_section(symtab, layout); |
03e25981 | 4968 | this->iplt_->add_ifunc_entry(gsym); |
e5d5f5ed AM |
4969 | } |
4970 | else | |
4971 | { | |
4972 | if (this->plt_ == NULL) | |
40b469d7 | 4973 | this->make_plt_section(symtab, layout); |
03e25981 | 4974 | this->plt_->add_entry(gsym); |
e5d5f5ed | 4975 | } |
e5d5f5ed | 4976 | } |
42cacb20 | 4977 | |
e5d5f5ed | 4978 | // Make a PLT entry for a local STT_GNU_IFUNC symbol. |
612a8d3d | 4979 | |
e5d5f5ed AM |
4980 | template<int size, bool big_endian> |
4981 | void | |
4982 | Target_powerpc<size, big_endian>::make_local_ifunc_plt_entry( | |
40b469d7 | 4983 | Symbol_table* symtab, |
e5d5f5ed | 4984 | Layout* layout, |
ec661b9d AM |
4985 | Sized_relobj_file<size, big_endian>* relobj, |
4986 | unsigned int r_sym) | |
e5d5f5ed AM |
4987 | { |
4988 | if (this->iplt_ == NULL) | |
40b469d7 | 4989 | this->make_iplt_section(symtab, layout); |
03e25981 | 4990 | this->iplt_->add_local_ifunc_entry(relobj, r_sym); |
42cacb20 DE |
4991 | } |
4992 | ||
0e70b911 CC |
4993 | // Return the number of entries in the PLT. |
4994 | ||
4995 | template<int size, bool big_endian> | |
4996 | unsigned int | |
4997 | Target_powerpc<size, big_endian>::plt_entry_count() const | |
4998 | { | |
4999 | if (this->plt_ == NULL) | |
5000 | return 0; | |
b3ccdeb5 | 5001 | return this->plt_->entry_count(); |
0e70b911 CC |
5002 | } |
5003 | ||
dd93cd0a | 5004 | // Create a GOT entry for local dynamic __tls_get_addr calls. |
42cacb20 DE |
5005 | |
5006 | template<int size, bool big_endian> | |
5007 | unsigned int | |
dd93cd0a | 5008 | Target_powerpc<size, big_endian>::tlsld_got_offset( |
6fa2a40b CC |
5009 | Symbol_table* symtab, |
5010 | Layout* layout, | |
5011 | Sized_relobj_file<size, big_endian>* object) | |
42cacb20 | 5012 | { |
dd93cd0a | 5013 | if (this->tlsld_got_offset_ == -1U) |
42cacb20 DE |
5014 | { |
5015 | gold_assert(symtab != NULL && layout != NULL && object != NULL); | |
5016 | Reloc_section* rela_dyn = this->rela_dyn_section(layout); | |
dd93cd0a AM |
5017 | Output_data_got_powerpc<size, big_endian>* got |
5018 | = this->got_section(symtab, layout); | |
5019 | unsigned int got_offset = got->add_constant_pair(0, 0); | |
42cacb20 DE |
5020 | rela_dyn->add_local(object, 0, elfcpp::R_POWERPC_DTPMOD, got, |
5021 | got_offset, 0); | |
dd93cd0a | 5022 | this->tlsld_got_offset_ = got_offset; |
42cacb20 | 5023 | } |
dd93cd0a | 5024 | return this->tlsld_got_offset_; |
42cacb20 DE |
5025 | } |
5026 | ||
95a2c8d6 RS |
5027 | // Get the Reference_flags for a particular relocation. |
5028 | ||
5029 | template<int size, bool big_endian> | |
5030 | int | |
88b8e639 AM |
5031 | Target_powerpc<size, big_endian>::Scan::get_reference_flags( |
5032 | unsigned int r_type, | |
5033 | const Target_powerpc* target) | |
95a2c8d6 | 5034 | { |
88b8e639 AM |
5035 | int ref = 0; |
5036 | ||
95a2c8d6 RS |
5037 | switch (r_type) |
5038 | { | |
5039 | case elfcpp::R_POWERPC_NONE: | |
5040 | case elfcpp::R_POWERPC_GNU_VTINHERIT: | |
5041 | case elfcpp::R_POWERPC_GNU_VTENTRY: | |
5042 | case elfcpp::R_PPC64_TOC: | |
5043 | // No symbol reference. | |
88b8e639 | 5044 | break; |
95a2c8d6 | 5045 | |
dd93cd0a AM |
5046 | case elfcpp::R_PPC64_ADDR64: |
5047 | case elfcpp::R_PPC64_UADDR64: | |
5048 | case elfcpp::R_POWERPC_ADDR32: | |
5049 | case elfcpp::R_POWERPC_UADDR32: | |
95a2c8d6 | 5050 | case elfcpp::R_POWERPC_ADDR16: |
dd93cd0a | 5051 | case elfcpp::R_POWERPC_UADDR16: |
95a2c8d6 RS |
5052 | case elfcpp::R_POWERPC_ADDR16_LO: |
5053 | case elfcpp::R_POWERPC_ADDR16_HI: | |
5054 | case elfcpp::R_POWERPC_ADDR16_HA: | |
88b8e639 AM |
5055 | ref = Symbol::ABSOLUTE_REF; |
5056 | break; | |
95a2c8d6 | 5057 | |
dd93cd0a AM |
5058 | case elfcpp::R_POWERPC_ADDR24: |
5059 | case elfcpp::R_POWERPC_ADDR14: | |
5060 | case elfcpp::R_POWERPC_ADDR14_BRTAKEN: | |
5061 | case elfcpp::R_POWERPC_ADDR14_BRNTAKEN: | |
88b8e639 AM |
5062 | ref = Symbol::FUNCTION_CALL | Symbol::ABSOLUTE_REF; |
5063 | break; | |
dd93cd0a | 5064 | |
e5d5f5ed | 5065 | case elfcpp::R_PPC64_REL64: |
dd93cd0a | 5066 | case elfcpp::R_POWERPC_REL32: |
95a2c8d6 | 5067 | case elfcpp::R_PPC_LOCAL24PC: |
6ce78956 AM |
5068 | case elfcpp::R_POWERPC_REL16: |
5069 | case elfcpp::R_POWERPC_REL16_LO: | |
5070 | case elfcpp::R_POWERPC_REL16_HI: | |
5071 | case elfcpp::R_POWERPC_REL16_HA: | |
88b8e639 AM |
5072 | ref = Symbol::RELATIVE_REF; |
5073 | break; | |
95a2c8d6 | 5074 | |
dd93cd0a | 5075 | case elfcpp::R_POWERPC_REL24: |
95a2c8d6 | 5076 | case elfcpp::R_PPC_PLTREL24: |
dd93cd0a AM |
5077 | case elfcpp::R_POWERPC_REL14: |
5078 | case elfcpp::R_POWERPC_REL14_BRTAKEN: | |
5079 | case elfcpp::R_POWERPC_REL14_BRNTAKEN: | |
88b8e639 AM |
5080 | ref = Symbol::FUNCTION_CALL | Symbol::RELATIVE_REF; |
5081 | break; | |
95a2c8d6 RS |
5082 | |
5083 | case elfcpp::R_POWERPC_GOT16: | |
5084 | case elfcpp::R_POWERPC_GOT16_LO: | |
5085 | case elfcpp::R_POWERPC_GOT16_HI: | |
5086 | case elfcpp::R_POWERPC_GOT16_HA: | |
e5d5f5ed AM |
5087 | case elfcpp::R_PPC64_GOT16_DS: |
5088 | case elfcpp::R_PPC64_GOT16_LO_DS: | |
95a2c8d6 RS |
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: | |
5095 | // Absolute in GOT. | |
88b8e639 AM |
5096 | ref = Symbol::ABSOLUTE_REF; |
5097 | break; | |
95a2c8d6 RS |
5098 | |
5099 | case elfcpp::R_POWERPC_GOT_TPREL16: | |
5100 | case elfcpp::R_POWERPC_TLS: | |
88b8e639 AM |
5101 | ref = Symbol::TLS_REF; |
5102 | break; | |
95a2c8d6 RS |
5103 | |
5104 | case elfcpp::R_POWERPC_COPY: | |
5105 | case elfcpp::R_POWERPC_GLOB_DAT: | |
5106 | case elfcpp::R_POWERPC_JMP_SLOT: | |
5107 | case elfcpp::R_POWERPC_RELATIVE: | |
5108 | case elfcpp::R_POWERPC_DTPMOD: | |
5109 | default: | |
5110 | // Not expected. We will give an error later. | |
88b8e639 | 5111 | break; |
95a2c8d6 | 5112 | } |
88b8e639 AM |
5113 | |
5114 | if (size == 64 && target->abiversion() < 2) | |
5115 | ref |= Symbol::FUNC_DESC_ABI; | |
5116 | return ref; | |
95a2c8d6 RS |
5117 | } |
5118 | ||
42cacb20 DE |
5119 | // Report an unsupported relocation against a local symbol. |
5120 | ||
5121 | template<int size, bool big_endian> | |
5122 | void | |
5123 | Target_powerpc<size, big_endian>::Scan::unsupported_reloc_local( | |
d83ce4e3 AM |
5124 | Sized_relobj_file<size, big_endian>* object, |
5125 | unsigned int r_type) | |
42cacb20 DE |
5126 | { |
5127 | gold_error(_("%s: unsupported reloc %u against local symbol"), | |
5128 | object->name().c_str(), r_type); | |
5129 | } | |
5130 | ||
5131 | // We are about to emit a dynamic relocation of type R_TYPE. If the | |
5132 | // dynamic linker does not support it, issue an error. | |
5133 | ||
5134 | template<int size, bool big_endian> | |
5135 | void | |
5136 | Target_powerpc<size, big_endian>::Scan::check_non_pic(Relobj* object, | |
5137 | unsigned int r_type) | |
5138 | { | |
5139 | gold_assert(r_type != elfcpp::R_POWERPC_NONE); | |
5140 | ||
5141 | // These are the relocation types supported by glibc for both 32-bit | |
5142 | // and 64-bit powerpc. | |
5143 | switch (r_type) | |
5144 | { | |
3ea0a085 | 5145 | case elfcpp::R_POWERPC_NONE: |
42cacb20 DE |
5146 | case elfcpp::R_POWERPC_RELATIVE: |
5147 | case elfcpp::R_POWERPC_GLOB_DAT: | |
5148 | case elfcpp::R_POWERPC_DTPMOD: | |
5149 | case elfcpp::R_POWERPC_DTPREL: | |
5150 | case elfcpp::R_POWERPC_TPREL: | |
5151 | case elfcpp::R_POWERPC_JMP_SLOT: | |
5152 | case elfcpp::R_POWERPC_COPY: | |
3ea0a085 | 5153 | case elfcpp::R_POWERPC_IRELATIVE: |
42cacb20 | 5154 | case elfcpp::R_POWERPC_ADDR32: |
3ea0a085 | 5155 | case elfcpp::R_POWERPC_UADDR32: |
42cacb20 | 5156 | case elfcpp::R_POWERPC_ADDR24: |
3ea0a085 AM |
5157 | case elfcpp::R_POWERPC_ADDR16: |
5158 | case elfcpp::R_POWERPC_UADDR16: | |
5159 | case elfcpp::R_POWERPC_ADDR16_LO: | |
5160 | case elfcpp::R_POWERPC_ADDR16_HI: | |
5161 | case elfcpp::R_POWERPC_ADDR16_HA: | |
5162 | case elfcpp::R_POWERPC_ADDR14: | |
5163 | case elfcpp::R_POWERPC_ADDR14_BRTAKEN: | |
5164 | case elfcpp::R_POWERPC_ADDR14_BRNTAKEN: | |
5165 | case elfcpp::R_POWERPC_REL32: | |
42cacb20 | 5166 | case elfcpp::R_POWERPC_REL24: |
3ea0a085 AM |
5167 | case elfcpp::R_POWERPC_TPREL16: |
5168 | case elfcpp::R_POWERPC_TPREL16_LO: | |
5169 | case elfcpp::R_POWERPC_TPREL16_HI: | |
5170 | case elfcpp::R_POWERPC_TPREL16_HA: | |
42cacb20 DE |
5171 | return; |
5172 | ||
5173 | default: | |
5174 | break; | |
5175 | } | |
5176 | ||
5177 | if (size == 64) | |
5178 | { | |
5179 | switch (r_type) | |
5180 | { | |
5181 | // These are the relocation types supported only on 64-bit. | |
5182 | case elfcpp::R_PPC64_ADDR64: | |
42cacb20 | 5183 | case elfcpp::R_PPC64_UADDR64: |
3ea0a085 | 5184 | case elfcpp::R_PPC64_JMP_IREL: |
42cacb20 | 5185 | case elfcpp::R_PPC64_ADDR16_DS: |
3ea0a085 | 5186 | case elfcpp::R_PPC64_ADDR16_LO_DS: |
f9c6b907 AM |
5187 | case elfcpp::R_PPC64_ADDR16_HIGH: |
5188 | case elfcpp::R_PPC64_ADDR16_HIGHA: | |
42cacb20 DE |
5189 | case elfcpp::R_PPC64_ADDR16_HIGHER: |
5190 | case elfcpp::R_PPC64_ADDR16_HIGHEST: | |
5191 | case elfcpp::R_PPC64_ADDR16_HIGHERA: | |
5192 | case elfcpp::R_PPC64_ADDR16_HIGHESTA: | |
42cacb20 | 5193 | case elfcpp::R_PPC64_REL64: |
3ea0a085 AM |
5194 | case elfcpp::R_POWERPC_ADDR30: |
5195 | case elfcpp::R_PPC64_TPREL16_DS: | |
5196 | case elfcpp::R_PPC64_TPREL16_LO_DS: | |
f9c6b907 AM |
5197 | case elfcpp::R_PPC64_TPREL16_HIGH: |
5198 | case elfcpp::R_PPC64_TPREL16_HIGHA: | |
3ea0a085 AM |
5199 | case elfcpp::R_PPC64_TPREL16_HIGHER: |
5200 | case elfcpp::R_PPC64_TPREL16_HIGHEST: | |
5201 | case elfcpp::R_PPC64_TPREL16_HIGHERA: | |
5202 | case elfcpp::R_PPC64_TPREL16_HIGHESTA: | |
42cacb20 DE |
5203 | return; |
5204 | ||
5205 | default: | |
5206 | break; | |
5207 | } | |
5208 | } | |
5209 | else | |
5210 | { | |
5211 | switch (r_type) | |
5212 | { | |
5213 | // These are the relocation types supported only on 32-bit. | |
3ea0a085 AM |
5214 | // ??? glibc ld.so doesn't need to support these. |
5215 | case elfcpp::R_POWERPC_DTPREL16: | |
5216 | case elfcpp::R_POWERPC_DTPREL16_LO: | |
5217 | case elfcpp::R_POWERPC_DTPREL16_HI: | |
5218 | case elfcpp::R_POWERPC_DTPREL16_HA: | |
5219 | return; | |
42cacb20 DE |
5220 | |
5221 | default: | |
5222 | break; | |
5223 | } | |
5224 | } | |
5225 | ||
5226 | // This prevents us from issuing more than one error per reloc | |
5227 | // section. But we can still wind up issuing more than one | |
5228 | // error per object file. | |
5229 | if (this->issued_non_pic_error_) | |
5230 | return; | |
33aea2fd | 5231 | gold_assert(parameters->options().output_is_position_independent()); |
42cacb20 DE |
5232 | object->error(_("requires unsupported dynamic reloc; " |
5233 | "recompile with -fPIC")); | |
5234 | this->issued_non_pic_error_ = true; | |
5235 | return; | |
5236 | } | |
5237 | ||
e5d5f5ed AM |
5238 | // Return whether we need to make a PLT entry for a relocation of the |
5239 | // given type against a STT_GNU_IFUNC symbol. | |
5240 | ||
5241 | template<int size, bool big_endian> | |
5242 | bool | |
5243 | Target_powerpc<size, big_endian>::Scan::reloc_needs_plt_for_ifunc( | |
9055360d | 5244 | Target_powerpc<size, big_endian>* target, |
e5d5f5ed | 5245 | Sized_relobj_file<size, big_endian>* object, |
b3ccdeb5 AM |
5246 | unsigned int r_type, |
5247 | bool report_err) | |
e5d5f5ed | 5248 | { |
c9824451 AM |
5249 | // In non-pic code any reference will resolve to the plt call stub |
5250 | // for the ifunc symbol. | |
9055360d AM |
5251 | if ((size == 32 || target->abiversion() >= 2) |
5252 | && !parameters->options().output_is_position_independent()) | |
c9824451 AM |
5253 | return true; |
5254 | ||
e5d5f5ed AM |
5255 | switch (r_type) |
5256 | { | |
b3ccdeb5 | 5257 | // Word size refs from data sections are OK, but don't need a PLT entry. |
e5d5f5ed AM |
5258 | case elfcpp::R_POWERPC_ADDR32: |
5259 | case elfcpp::R_POWERPC_UADDR32: | |
5260 | if (size == 32) | |
b3ccdeb5 | 5261 | return false; |
e5d5f5ed AM |
5262 | break; |
5263 | ||
5264 | case elfcpp::R_PPC64_ADDR64: | |
5265 | case elfcpp::R_PPC64_UADDR64: | |
5266 | if (size == 64) | |
b3ccdeb5 | 5267 | return false; |
e5d5f5ed AM |
5268 | break; |
5269 | ||
b3ccdeb5 | 5270 | // GOT refs are good, but also don't need a PLT entry. |
e5d5f5ed AM |
5271 | case elfcpp::R_POWERPC_GOT16: |
5272 | case elfcpp::R_POWERPC_GOT16_LO: | |
5273 | case elfcpp::R_POWERPC_GOT16_HI: | |
5274 | case elfcpp::R_POWERPC_GOT16_HA: | |
5275 | case elfcpp::R_PPC64_GOT16_DS: | |
5276 | case elfcpp::R_PPC64_GOT16_LO_DS: | |
b3ccdeb5 | 5277 | return false; |
e5d5f5ed | 5278 | |
b3ccdeb5 | 5279 | // Function calls are good, and these do need a PLT entry. |
e5d5f5ed AM |
5280 | case elfcpp::R_POWERPC_ADDR24: |
5281 | case elfcpp::R_POWERPC_ADDR14: | |
5282 | case elfcpp::R_POWERPC_ADDR14_BRTAKEN: | |
5283 | case elfcpp::R_POWERPC_ADDR14_BRNTAKEN: | |
5284 | case elfcpp::R_POWERPC_REL24: | |
5285 | case elfcpp::R_PPC_PLTREL24: | |
5286 | case elfcpp::R_POWERPC_REL14: | |
5287 | case elfcpp::R_POWERPC_REL14_BRTAKEN: | |
5288 | case elfcpp::R_POWERPC_REL14_BRNTAKEN: | |
5289 | return true; | |
5290 | ||
5291 | default: | |
5292 | break; | |
5293 | } | |
5294 | ||
5295 | // Anything else is a problem. | |
5296 | // If we are building a static executable, the libc startup function | |
5297 | // responsible for applying indirect function relocations is going | |
5298 | // to complain about the reloc type. | |
5299 | // If we are building a dynamic executable, we will have a text | |
5300 | // relocation. The dynamic loader will set the text segment | |
5301 | // writable and non-executable to apply text relocations. So we'll | |
5302 | // segfault when trying to run the indirection function to resolve | |
5303 | // the reloc. | |
b3ccdeb5 AM |
5304 | if (report_err) |
5305 | gold_error(_("%s: unsupported reloc %u for IFUNC symbol"), | |
e5d5f5ed AM |
5306 | object->name().c_str(), r_type); |
5307 | return false; | |
5308 | } | |
5309 | ||
42cacb20 DE |
5310 | // Scan a relocation for a local symbol. |
5311 | ||
5312 | template<int size, bool big_endian> | |
5313 | inline void | |
5314 | Target_powerpc<size, big_endian>::Scan::local( | |
d83ce4e3 AM |
5315 | Symbol_table* symtab, |
5316 | Layout* layout, | |
5317 | Target_powerpc<size, big_endian>* target, | |
5318 | Sized_relobj_file<size, big_endian>* object, | |
5319 | unsigned int data_shndx, | |
5320 | Output_section* output_section, | |
5321 | const elfcpp::Rela<size, big_endian>& reloc, | |
5322 | unsigned int r_type, | |
e5d5f5ed | 5323 | const elfcpp::Sym<size, big_endian>& lsym, |
bfdfa4cd | 5324 | bool is_discarded) |
42cacb20 | 5325 | { |
e3deeb9c AM |
5326 | this->maybe_skip_tls_get_addr_call(r_type, NULL); |
5327 | ||
5328 | if ((size == 64 && r_type == elfcpp::R_PPC64_TLSGD) | |
5329 | || (size == 32 && r_type == elfcpp::R_PPC_TLSGD)) | |
5330 | { | |
5331 | this->expect_tls_get_addr_call(); | |
5332 | const tls::Tls_optimization tls_type = target->optimize_tls_gd(true); | |
5333 | if (tls_type != tls::TLSOPT_NONE) | |
5334 | this->skip_next_tls_get_addr_call(); | |
5335 | } | |
5336 | else if ((size == 64 && r_type == elfcpp::R_PPC64_TLSLD) | |
5337 | || (size == 32 && r_type == elfcpp::R_PPC_TLSLD)) | |
5338 | { | |
5339 | this->expect_tls_get_addr_call(); | |
5340 | const tls::Tls_optimization tls_type = target->optimize_tls_ld(); | |
5341 | if (tls_type != tls::TLSOPT_NONE) | |
5342 | this->skip_next_tls_get_addr_call(); | |
5343 | } | |
5344 | ||
dd93cd0a AM |
5345 | Powerpc_relobj<size, big_endian>* ppc_object |
5346 | = static_cast<Powerpc_relobj<size, big_endian>*>(object); | |
5347 | ||
bfdfa4cd AM |
5348 | if (is_discarded) |
5349 | { | |
5350 | if (size == 64 | |
5351 | && data_shndx == ppc_object->opd_shndx() | |
5352 | && r_type == elfcpp::R_PPC64_ADDR64) | |
5353 | ppc_object->set_opd_discard(reloc.get_r_offset()); | |
5354 | return; | |
5355 | } | |
5356 | ||
e5d5f5ed AM |
5357 | // A local STT_GNU_IFUNC symbol may require a PLT entry. |
5358 | bool is_ifunc = lsym.get_st_type() == elfcpp::STT_GNU_IFUNC; | |
9055360d | 5359 | if (is_ifunc && this->reloc_needs_plt_for_ifunc(target, object, r_type, true)) |
40b469d7 | 5360 | { |
ec661b9d AM |
5361 | unsigned int r_sym = elfcpp::elf_r_sym<size>(reloc.get_r_info()); |
5362 | target->push_branch(ppc_object, data_shndx, reloc.get_r_offset(), | |
5363 | r_type, r_sym, reloc.get_r_addend()); | |
5364 | target->make_local_ifunc_plt_entry(symtab, layout, object, r_sym); | |
40b469d7 | 5365 | } |
e5d5f5ed | 5366 | |
42cacb20 DE |
5367 | switch (r_type) |
5368 | { | |
5369 | case elfcpp::R_POWERPC_NONE: | |
5370 | case elfcpp::R_POWERPC_GNU_VTINHERIT: | |
5371 | case elfcpp::R_POWERPC_GNU_VTENTRY: | |
6ce78956 | 5372 | case elfcpp::R_PPC64_TOCSAVE: |
7404fe1b | 5373 | case elfcpp::R_POWERPC_TLS: |
dd93cd0a AM |
5374 | break; |
5375 | ||
5376 | case elfcpp::R_PPC64_TOC: | |
5377 | { | |
5378 | Output_data_got_powerpc<size, big_endian>* got | |
5379 | = target->got_section(symtab, layout); | |
5380 | if (parameters->options().output_is_position_independent()) | |
5381 | { | |
bfdfa4cd AM |
5382 | Address off = reloc.get_r_offset(); |
5383 | if (size == 64 | |
9055360d | 5384 | && target->abiversion() < 2 |
bfdfa4cd AM |
5385 | && data_shndx == ppc_object->opd_shndx() |
5386 | && ppc_object->get_opd_discard(off - 8)) | |
5387 | break; | |
5388 | ||
dd93cd0a | 5389 | Reloc_section* rela_dyn = target->rela_dyn_section(layout); |
bfdfa4cd | 5390 | Powerpc_relobj<size, big_endian>* symobj = ppc_object; |
dd93cd0a AM |
5391 | rela_dyn->add_output_section_relative(got->output_section(), |
5392 | elfcpp::R_POWERPC_RELATIVE, | |
5393 | output_section, | |
bfdfa4cd AM |
5394 | object, data_shndx, off, |
5395 | symobj->toc_base_offset()); | |
dd93cd0a AM |
5396 | } |
5397 | } | |
42cacb20 DE |
5398 | break; |
5399 | ||
5400 | case elfcpp::R_PPC64_ADDR64: | |
dd93cd0a | 5401 | case elfcpp::R_PPC64_UADDR64: |
42cacb20 | 5402 | case elfcpp::R_POWERPC_ADDR32: |
dd93cd0a AM |
5403 | case elfcpp::R_POWERPC_UADDR32: |
5404 | case elfcpp::R_POWERPC_ADDR24: | |
c9269dff | 5405 | case elfcpp::R_POWERPC_ADDR16: |
42cacb20 | 5406 | case elfcpp::R_POWERPC_ADDR16_LO: |
c9269dff AM |
5407 | case elfcpp::R_POWERPC_ADDR16_HI: |
5408 | case elfcpp::R_POWERPC_ADDR16_HA: | |
dd93cd0a | 5409 | case elfcpp::R_POWERPC_UADDR16: |
f9c6b907 AM |
5410 | case elfcpp::R_PPC64_ADDR16_HIGH: |
5411 | case elfcpp::R_PPC64_ADDR16_HIGHA: | |
dd93cd0a AM |
5412 | case elfcpp::R_PPC64_ADDR16_HIGHER: |
5413 | case elfcpp::R_PPC64_ADDR16_HIGHERA: | |
5414 | case elfcpp::R_PPC64_ADDR16_HIGHEST: | |
5415 | case elfcpp::R_PPC64_ADDR16_HIGHESTA: | |
5416 | case elfcpp::R_PPC64_ADDR16_DS: | |
5417 | case elfcpp::R_PPC64_ADDR16_LO_DS: | |
5418 | case elfcpp::R_POWERPC_ADDR14: | |
5419 | case elfcpp::R_POWERPC_ADDR14_BRTAKEN: | |
5420 | case elfcpp::R_POWERPC_ADDR14_BRNTAKEN: | |
42cacb20 DE |
5421 | // If building a shared library (or a position-independent |
5422 | // executable), we need to create a dynamic relocation for | |
5423 | // this location. | |
c9824451 | 5424 | if (parameters->options().output_is_position_independent() |
9055360d | 5425 | || (size == 64 && is_ifunc && target->abiversion() < 2)) |
2e702c99 | 5426 | { |
b3ccdeb5 AM |
5427 | Reloc_section* rela_dyn = target->rela_dyn_section(symtab, layout, |
5428 | is_ifunc); | |
dd93cd0a AM |
5429 | if ((size == 32 && r_type == elfcpp::R_POWERPC_ADDR32) |
5430 | || (size == 64 && r_type == elfcpp::R_PPC64_ADDR64)) | |
2e702c99 RM |
5431 | { |
5432 | unsigned int r_sym = elfcpp::elf_r_sym<size>(reloc.get_r_info()); | |
b3ccdeb5 AM |
5433 | unsigned int dynrel = (is_ifunc ? elfcpp::R_POWERPC_IRELATIVE |
5434 | : elfcpp::R_POWERPC_RELATIVE); | |
e5d5f5ed | 5435 | rela_dyn->add_local_relative(object, r_sym, dynrel, |
dd93cd0a AM |
5436 | output_section, data_shndx, |
5437 | reloc.get_r_offset(), | |
c9824451 | 5438 | reloc.get_r_addend(), false); |
2e702c99 RM |
5439 | } |
5440 | else | |
5441 | { | |
dd93cd0a | 5442 | check_non_pic(object, r_type); |
42cacb20 | 5443 | unsigned int r_sym = elfcpp::elf_r_sym<size>(reloc.get_r_info()); |
dd93cd0a AM |
5444 | rela_dyn->add_local(object, r_sym, r_type, output_section, |
5445 | data_shndx, reloc.get_r_offset(), | |
5446 | reloc.get_r_addend()); | |
2e702c99 RM |
5447 | } |
5448 | } | |
42cacb20 DE |
5449 | break; |
5450 | ||
5451 | case elfcpp::R_POWERPC_REL24: | |
c9824451 | 5452 | case elfcpp::R_PPC_PLTREL24: |
42cacb20 | 5453 | case elfcpp::R_PPC_LOCAL24PC: |
ec661b9d AM |
5454 | case elfcpp::R_POWERPC_REL14: |
5455 | case elfcpp::R_POWERPC_REL14_BRTAKEN: | |
5456 | case elfcpp::R_POWERPC_REL14_BRNTAKEN: | |
b3ccdeb5 AM |
5457 | if (!is_ifunc) |
5458 | target->push_branch(ppc_object, data_shndx, reloc.get_r_offset(), | |
5459 | r_type, elfcpp::elf_r_sym<size>(reloc.get_r_info()), | |
5460 | reloc.get_r_addend()); | |
ec661b9d AM |
5461 | break; |
5462 | ||
5463 | case elfcpp::R_PPC64_REL64: | |
5464 | case elfcpp::R_POWERPC_REL32: | |
dd93cd0a | 5465 | case elfcpp::R_POWERPC_REL16: |
6ce78956 | 5466 | case elfcpp::R_POWERPC_REL16_LO: |
dd93cd0a | 5467 | case elfcpp::R_POWERPC_REL16_HI: |
6ce78956 | 5468 | case elfcpp::R_POWERPC_REL16_HA: |
dd93cd0a | 5469 | case elfcpp::R_POWERPC_SECTOFF: |
dd93cd0a | 5470 | case elfcpp::R_POWERPC_SECTOFF_LO: |
dd93cd0a | 5471 | case elfcpp::R_POWERPC_SECTOFF_HI: |
dd93cd0a | 5472 | case elfcpp::R_POWERPC_SECTOFF_HA: |
f9c6b907 AM |
5473 | case elfcpp::R_PPC64_SECTOFF_DS: |
5474 | case elfcpp::R_PPC64_SECTOFF_LO_DS: | |
5475 | case elfcpp::R_POWERPC_TPREL16: | |
5476 | case elfcpp::R_POWERPC_TPREL16_LO: | |
5477 | case elfcpp::R_POWERPC_TPREL16_HI: | |
dd93cd0a | 5478 | case elfcpp::R_POWERPC_TPREL16_HA: |
f9c6b907 AM |
5479 | case elfcpp::R_PPC64_TPREL16_DS: |
5480 | case elfcpp::R_PPC64_TPREL16_LO_DS: | |
5481 | case elfcpp::R_PPC64_TPREL16_HIGH: | |
5482 | case elfcpp::R_PPC64_TPREL16_HIGHA: | |
dd93cd0a | 5483 | case elfcpp::R_PPC64_TPREL16_HIGHER: |
dd93cd0a | 5484 | case elfcpp::R_PPC64_TPREL16_HIGHERA: |
dd93cd0a | 5485 | case elfcpp::R_PPC64_TPREL16_HIGHEST: |
dd93cd0a | 5486 | case elfcpp::R_PPC64_TPREL16_HIGHESTA: |
f9c6b907 AM |
5487 | case elfcpp::R_POWERPC_DTPREL16: |
5488 | case elfcpp::R_POWERPC_DTPREL16_LO: | |
5489 | case elfcpp::R_POWERPC_DTPREL16_HI: | |
5490 | case elfcpp::R_POWERPC_DTPREL16_HA: | |
dd93cd0a AM |
5491 | case elfcpp::R_PPC64_DTPREL16_DS: |
5492 | case elfcpp::R_PPC64_DTPREL16_LO_DS: | |
f9c6b907 AM |
5493 | case elfcpp::R_PPC64_DTPREL16_HIGH: |
5494 | case elfcpp::R_PPC64_DTPREL16_HIGHA: | |
5495 | case elfcpp::R_PPC64_DTPREL16_HIGHER: | |
5496 | case elfcpp::R_PPC64_DTPREL16_HIGHERA: | |
5497 | case elfcpp::R_PPC64_DTPREL16_HIGHEST: | |
5498 | case elfcpp::R_PPC64_DTPREL16_HIGHESTA: | |
dd93cd0a AM |
5499 | case elfcpp::R_PPC64_TLSGD: |
5500 | case elfcpp::R_PPC64_TLSLD: | |
45965137 | 5501 | case elfcpp::R_PPC64_ADDR64_LOCAL: |
42cacb20 DE |
5502 | break; |
5503 | ||
5504 | case elfcpp::R_POWERPC_GOT16: | |
5505 | case elfcpp::R_POWERPC_GOT16_LO: | |
5506 | case elfcpp::R_POWERPC_GOT16_HI: | |
5507 | case elfcpp::R_POWERPC_GOT16_HA: | |
dd93cd0a AM |
5508 | case elfcpp::R_PPC64_GOT16_DS: |
5509 | case elfcpp::R_PPC64_GOT16_LO_DS: | |
42cacb20 | 5510 | { |
c9269dff | 5511 | // The symbol requires a GOT entry. |
dd93cd0a AM |
5512 | Output_data_got_powerpc<size, big_endian>* got |
5513 | = target->got_section(symtab, layout); | |
5514 | unsigned int r_sym = elfcpp::elf_r_sym<size>(reloc.get_r_info()); | |
42cacb20 | 5515 | |
e5d5f5ed | 5516 | if (!parameters->options().output_is_position_independent()) |
42cacb20 | 5517 | { |
9055360d AM |
5518 | if ((size == 32 && is_ifunc) |
5519 | || (size == 64 && target->abiversion() >= 2)) | |
e5d5f5ed AM |
5520 | got->add_local_plt(object, r_sym, GOT_TYPE_STANDARD); |
5521 | else | |
5522 | got->add_local(object, r_sym, GOT_TYPE_STANDARD); | |
5523 | } | |
5524 | else if (!object->local_has_got_offset(r_sym, GOT_TYPE_STANDARD)) | |
5525 | { | |
5526 | // If we are generating a shared object or a pie, this | |
5527 | // symbol's GOT entry will be set by a dynamic relocation. | |
5528 | unsigned int off; | |
5529 | off = got->add_constant(0); | |
5530 | object->set_local_got_offset(r_sym, GOT_TYPE_STANDARD, off); | |
42cacb20 | 5531 | |
b3ccdeb5 AM |
5532 | Reloc_section* rela_dyn = target->rela_dyn_section(symtab, layout, |
5533 | is_ifunc); | |
5534 | unsigned int dynrel = (is_ifunc ? elfcpp::R_POWERPC_IRELATIVE | |
5535 | : elfcpp::R_POWERPC_RELATIVE); | |
e5d5f5ed | 5536 | rela_dyn->add_local_relative(object, r_sym, dynrel, |
c9824451 | 5537 | got, off, 0, false); |
2e702c99 | 5538 | } |
42cacb20 DE |
5539 | } |
5540 | break; | |
5541 | ||
cf43a2fe AM |
5542 | case elfcpp::R_PPC64_TOC16: |
5543 | case elfcpp::R_PPC64_TOC16_LO: | |
5544 | case elfcpp::R_PPC64_TOC16_HI: | |
5545 | case elfcpp::R_PPC64_TOC16_HA: | |
5546 | case elfcpp::R_PPC64_TOC16_DS: | |
5547 | case elfcpp::R_PPC64_TOC16_LO_DS: | |
42cacb20 DE |
5548 | // We need a GOT section. |
5549 | target->got_section(symtab, layout); | |
5550 | break; | |
5551 | ||
dd93cd0a AM |
5552 | case elfcpp::R_POWERPC_GOT_TLSGD16: |
5553 | case elfcpp::R_POWERPC_GOT_TLSGD16_LO: | |
5554 | case elfcpp::R_POWERPC_GOT_TLSGD16_HI: | |
5555 | case elfcpp::R_POWERPC_GOT_TLSGD16_HA: | |
5556 | { | |
5557 | const tls::Tls_optimization tls_type = target->optimize_tls_gd(true); | |
5558 | if (tls_type == tls::TLSOPT_NONE) | |
5559 | { | |
5560 | Output_data_got_powerpc<size, big_endian>* got | |
5561 | = target->got_section(symtab, layout); | |
5562 | unsigned int r_sym = elfcpp::elf_r_sym<size>(reloc.get_r_info()); | |
bd73a62d AM |
5563 | Reloc_section* rela_dyn = target->rela_dyn_section(layout); |
5564 | got->add_local_tls_pair(object, r_sym, GOT_TYPE_TLSGD, | |
5565 | rela_dyn, elfcpp::R_POWERPC_DTPMOD); | |
dd93cd0a AM |
5566 | } |
5567 | else if (tls_type == tls::TLSOPT_TO_LE) | |
5568 | { | |
5569 | // no GOT relocs needed for Local Exec. | |
5570 | } | |
5571 | else | |
5572 | gold_unreachable(); | |
5573 | } | |
42cacb20 DE |
5574 | break; |
5575 | ||
dd93cd0a AM |
5576 | case elfcpp::R_POWERPC_GOT_TLSLD16: |
5577 | case elfcpp::R_POWERPC_GOT_TLSLD16_LO: | |
5578 | case elfcpp::R_POWERPC_GOT_TLSLD16_HI: | |
5579 | case elfcpp::R_POWERPC_GOT_TLSLD16_HA: | |
5580 | { | |
5581 | const tls::Tls_optimization tls_type = target->optimize_tls_ld(); | |
5582 | if (tls_type == tls::TLSOPT_NONE) | |
5583 | target->tlsld_got_offset(symtab, layout, object); | |
5584 | else if (tls_type == tls::TLSOPT_TO_LE) | |
5585 | { | |
5586 | // no GOT relocs needed for Local Exec. | |
7404fe1b AM |
5587 | if (parameters->options().emit_relocs()) |
5588 | { | |
5589 | Output_section* os = layout->tls_segment()->first_section(); | |
5590 | gold_assert(os != NULL); | |
5591 | os->set_needs_symtab_index(); | |
5592 | } | |
dd93cd0a AM |
5593 | } |
5594 | else | |
5595 | gold_unreachable(); | |
5596 | } | |
42cacb20 | 5597 | break; |
42cacb20 | 5598 | |
dd93cd0a AM |
5599 | case elfcpp::R_POWERPC_GOT_DTPREL16: |
5600 | case elfcpp::R_POWERPC_GOT_DTPREL16_LO: | |
5601 | case elfcpp::R_POWERPC_GOT_DTPREL16_HI: | |
5602 | case elfcpp::R_POWERPC_GOT_DTPREL16_HA: | |
5603 | { | |
5604 | Output_data_got_powerpc<size, big_endian>* got | |
5605 | = target->got_section(symtab, layout); | |
5606 | unsigned int r_sym = elfcpp::elf_r_sym<size>(reloc.get_r_info()); | |
bd73a62d | 5607 | got->add_local_tls(object, r_sym, GOT_TYPE_DTPREL); |
dd93cd0a AM |
5608 | } |
5609 | break; | |
42cacb20 | 5610 | |
dd93cd0a AM |
5611 | case elfcpp::R_POWERPC_GOT_TPREL16: |
5612 | case elfcpp::R_POWERPC_GOT_TPREL16_LO: | |
5613 | case elfcpp::R_POWERPC_GOT_TPREL16_HI: | |
5614 | case elfcpp::R_POWERPC_GOT_TPREL16_HA: | |
5615 | { | |
5616 | const tls::Tls_optimization tls_type = target->optimize_tls_ie(true); | |
5617 | if (tls_type == tls::TLSOPT_NONE) | |
5618 | { | |
dd93cd0a | 5619 | unsigned int r_sym = elfcpp::elf_r_sym<size>(reloc.get_r_info()); |
acc276d8 AM |
5620 | if (!object->local_has_got_offset(r_sym, GOT_TYPE_TPREL)) |
5621 | { | |
5622 | Output_data_got_powerpc<size, big_endian>* got | |
5623 | = target->got_section(symtab, layout); | |
5624 | unsigned int off = got->add_constant(0); | |
5625 | object->set_local_got_offset(r_sym, GOT_TYPE_TPREL, off); | |
5626 | ||
5627 | Reloc_section* rela_dyn = target->rela_dyn_section(layout); | |
5628 | rela_dyn->add_symbolless_local_addend(object, r_sym, | |
5629 | elfcpp::R_POWERPC_TPREL, | |
5630 | got, off, 0); | |
5631 | } | |
dd93cd0a AM |
5632 | } |
5633 | else if (tls_type == tls::TLSOPT_TO_LE) | |
5634 | { | |
5635 | // no GOT relocs needed for Local Exec. | |
5636 | } | |
5637 | else | |
5638 | gold_unreachable(); | |
5639 | } | |
5640 | break; | |
5641 | ||
5642 | default: | |
5643 | unsupported_reloc_local(object, r_type); | |
5644 | break; | |
5645 | } | |
d8f5a274 AM |
5646 | |
5647 | switch (r_type) | |
5648 | { | |
5649 | case elfcpp::R_POWERPC_GOT_TLSLD16: | |
5650 | case elfcpp::R_POWERPC_GOT_TLSGD16: | |
5651 | case elfcpp::R_POWERPC_GOT_TPREL16: | |
5652 | case elfcpp::R_POWERPC_GOT_DTPREL16: | |
5653 | case elfcpp::R_POWERPC_GOT16: | |
5654 | case elfcpp::R_PPC64_GOT16_DS: | |
5655 | case elfcpp::R_PPC64_TOC16: | |
5656 | case elfcpp::R_PPC64_TOC16_DS: | |
5657 | ppc_object->set_has_small_toc_reloc(); | |
5658 | default: | |
5659 | break; | |
5660 | } | |
dd93cd0a AM |
5661 | } |
5662 | ||
5663 | // Report an unsupported relocation against a global symbol. | |
5664 | ||
5665 | template<int size, bool big_endian> | |
5666 | void | |
5667 | Target_powerpc<size, big_endian>::Scan::unsupported_reloc_global( | |
5668 | Sized_relobj_file<size, big_endian>* object, | |
5669 | unsigned int r_type, | |
5670 | Symbol* gsym) | |
5671 | { | |
42cacb20 DE |
5672 | gold_error(_("%s: unsupported reloc %u against global symbol %s"), |
5673 | object->name().c_str(), r_type, gsym->demangled_name().c_str()); | |
5674 | } | |
5675 | ||
5676 | // Scan a relocation for a global symbol. | |
5677 | ||
5678 | template<int size, bool big_endian> | |
5679 | inline void | |
5680 | Target_powerpc<size, big_endian>::Scan::global( | |
d83ce4e3 AM |
5681 | Symbol_table* symtab, |
5682 | Layout* layout, | |
5683 | Target_powerpc<size, big_endian>* target, | |
5684 | Sized_relobj_file<size, big_endian>* object, | |
5685 | unsigned int data_shndx, | |
5686 | Output_section* output_section, | |
5687 | const elfcpp::Rela<size, big_endian>& reloc, | |
5688 | unsigned int r_type, | |
5689 | Symbol* gsym) | |
42cacb20 | 5690 | { |
e3deeb9c AM |
5691 | if (this->maybe_skip_tls_get_addr_call(r_type, gsym) == Track_tls::SKIP) |
5692 | return; | |
5693 | ||
5694 | if ((size == 64 && r_type == elfcpp::R_PPC64_TLSGD) | |
5695 | || (size == 32 && r_type == elfcpp::R_PPC_TLSGD)) | |
5696 | { | |
5697 | this->expect_tls_get_addr_call(); | |
5698 | const bool final = gsym->final_value_is_known(); | |
5699 | const tls::Tls_optimization tls_type = target->optimize_tls_gd(final); | |
5700 | if (tls_type != tls::TLSOPT_NONE) | |
5701 | this->skip_next_tls_get_addr_call(); | |
5702 | } | |
5703 | else if ((size == 64 && r_type == elfcpp::R_PPC64_TLSLD) | |
5704 | || (size == 32 && r_type == elfcpp::R_PPC_TLSLD)) | |
5705 | { | |
5706 | this->expect_tls_get_addr_call(); | |
5707 | const tls::Tls_optimization tls_type = target->optimize_tls_ld(); | |
5708 | if (tls_type != tls::TLSOPT_NONE) | |
5709 | this->skip_next_tls_get_addr_call(); | |
5710 | } | |
5711 | ||
dd93cd0a AM |
5712 | Powerpc_relobj<size, big_endian>* ppc_object |
5713 | = static_cast<Powerpc_relobj<size, big_endian>*>(object); | |
5714 | ||
e5d5f5ed | 5715 | // A STT_GNU_IFUNC symbol may require a PLT entry. |
b3ccdeb5 | 5716 | bool is_ifunc = gsym->type() == elfcpp::STT_GNU_IFUNC; |
9055360d AM |
5717 | bool pushed_ifunc = false; |
5718 | if (is_ifunc && this->reloc_needs_plt_for_ifunc(target, object, r_type, true)) | |
ec661b9d AM |
5719 | { |
5720 | target->push_branch(ppc_object, data_shndx, reloc.get_r_offset(), | |
5721 | r_type, elfcpp::elf_r_sym<size>(reloc.get_r_info()), | |
5722 | reloc.get_r_addend()); | |
5723 | target->make_plt_entry(symtab, layout, gsym); | |
9055360d | 5724 | pushed_ifunc = true; |
ec661b9d | 5725 | } |
e5d5f5ed | 5726 | |
42cacb20 DE |
5727 | switch (r_type) |
5728 | { | |
5729 | case elfcpp::R_POWERPC_NONE: | |
5730 | case elfcpp::R_POWERPC_GNU_VTINHERIT: | |
5731 | case elfcpp::R_POWERPC_GNU_VTENTRY: | |
cf43a2fe | 5732 | case elfcpp::R_PPC_LOCAL24PC: |
7404fe1b | 5733 | case elfcpp::R_POWERPC_TLS: |
dd93cd0a AM |
5734 | break; |
5735 | ||
5736 | case elfcpp::R_PPC64_TOC: | |
5737 | { | |
5738 | Output_data_got_powerpc<size, big_endian>* got | |
5739 | = target->got_section(symtab, layout); | |
5740 | if (parameters->options().output_is_position_independent()) | |
5741 | { | |
bfdfa4cd AM |
5742 | Address off = reloc.get_r_offset(); |
5743 | if (size == 64 | |
5744 | && data_shndx == ppc_object->opd_shndx() | |
5745 | && ppc_object->get_opd_discard(off - 8)) | |
5746 | break; | |
5747 | ||
dd93cd0a AM |
5748 | Reloc_section* rela_dyn = target->rela_dyn_section(layout); |
5749 | Powerpc_relobj<size, big_endian>* symobj = ppc_object; | |
5750 | if (data_shndx != ppc_object->opd_shndx()) | |
5751 | symobj = static_cast | |
5752 | <Powerpc_relobj<size, big_endian>*>(gsym->object()); | |
5753 | rela_dyn->add_output_section_relative(got->output_section(), | |
5754 | elfcpp::R_POWERPC_RELATIVE, | |
5755 | output_section, | |
bfdfa4cd | 5756 | object, data_shndx, off, |
dd93cd0a AM |
5757 | symobj->toc_base_offset()); |
5758 | } | |
5759 | } | |
42cacb20 DE |
5760 | break; |
5761 | ||
c9269dff | 5762 | case elfcpp::R_PPC64_ADDR64: |
bfdfa4cd | 5763 | if (size == 64 |
9055360d | 5764 | && target->abiversion() < 2 |
bfdfa4cd AM |
5765 | && data_shndx == ppc_object->opd_shndx() |
5766 | && (gsym->is_defined_in_discarded_section() | |
5767 | || gsym->object() != object)) | |
5768 | { | |
5769 | ppc_object->set_opd_discard(reloc.get_r_offset()); | |
5770 | break; | |
5771 | } | |
5772 | // Fall thru | |
dd93cd0a | 5773 | case elfcpp::R_PPC64_UADDR64: |
c9269dff | 5774 | case elfcpp::R_POWERPC_ADDR32: |
dd93cd0a AM |
5775 | case elfcpp::R_POWERPC_UADDR32: |
5776 | case elfcpp::R_POWERPC_ADDR24: | |
42cacb20 DE |
5777 | case elfcpp::R_POWERPC_ADDR16: |
5778 | case elfcpp::R_POWERPC_ADDR16_LO: | |
5779 | case elfcpp::R_POWERPC_ADDR16_HI: | |
5780 | case elfcpp::R_POWERPC_ADDR16_HA: | |
dd93cd0a | 5781 | case elfcpp::R_POWERPC_UADDR16: |
f9c6b907 AM |
5782 | case elfcpp::R_PPC64_ADDR16_HIGH: |
5783 | case elfcpp::R_PPC64_ADDR16_HIGHA: | |
dd93cd0a AM |
5784 | case elfcpp::R_PPC64_ADDR16_HIGHER: |
5785 | case elfcpp::R_PPC64_ADDR16_HIGHERA: | |
5786 | case elfcpp::R_PPC64_ADDR16_HIGHEST: | |
5787 | case elfcpp::R_PPC64_ADDR16_HIGHESTA: | |
5788 | case elfcpp::R_PPC64_ADDR16_DS: | |
5789 | case elfcpp::R_PPC64_ADDR16_LO_DS: | |
5790 | case elfcpp::R_POWERPC_ADDR14: | |
5791 | case elfcpp::R_POWERPC_ADDR14_BRTAKEN: | |
5792 | case elfcpp::R_POWERPC_ADDR14_BRNTAKEN: | |
42cacb20 | 5793 | { |
c9269dff AM |
5794 | // Make a PLT entry if necessary. |
5795 | if (gsym->needs_plt_entry()) | |
5796 | { | |
9055360d AM |
5797 | // Since this is not a PC-relative relocation, we may be |
5798 | // taking the address of a function. In that case we need to | |
5799 | // set the entry in the dynamic symbol table to the address of | |
5800 | // the PLT call stub. | |
5801 | bool need_ifunc_plt = false; | |
5802 | if ((size == 32 || target->abiversion() >= 2) | |
5803 | && gsym->is_from_dynobj() | |
5804 | && !parameters->options().output_is_position_independent()) | |
5805 | { | |
5806 | gsym->set_needs_dynsym_value(); | |
5807 | need_ifunc_plt = true; | |
5808 | } | |
5809 | if (!is_ifunc || (!pushed_ifunc && need_ifunc_plt)) | |
b3ccdeb5 AM |
5810 | { |
5811 | target->push_branch(ppc_object, data_shndx, | |
5812 | reloc.get_r_offset(), r_type, | |
5813 | elfcpp::elf_r_sym<size>(reloc.get_r_info()), | |
5814 | reloc.get_r_addend()); | |
5815 | target->make_plt_entry(symtab, layout, gsym); | |
5816 | } | |
c9269dff AM |
5817 | } |
5818 | // Make a dynamic relocation if necessary. | |
88b8e639 | 5819 | if (gsym->needs_dynamic_reloc(Scan::get_reference_flags(r_type, target)) |
9055360d | 5820 | || (size == 64 && is_ifunc && target->abiversion() < 2)) |
c9269dff AM |
5821 | { |
5822 | if (gsym->may_need_copy_reloc()) | |
5823 | { | |
5824 | target->copy_reloc(symtab, layout, object, | |
5825 | data_shndx, output_section, gsym, reloc); | |
5826 | } | |
9055360d AM |
5827 | else if ((((size == 32 |
5828 | && r_type == elfcpp::R_POWERPC_ADDR32) | |
5829 | || (size == 64 | |
5830 | && r_type == elfcpp::R_PPC64_ADDR64 | |
5831 | && target->abiversion() >= 2)) | |
627b30b7 AM |
5832 | && gsym->can_use_relative_reloc(false) |
5833 | && !(gsym->visibility() == elfcpp::STV_PROTECTED | |
5834 | && parameters->options().shared())) | |
5835 | || (size == 64 | |
5836 | && r_type == elfcpp::R_PPC64_ADDR64 | |
9055360d | 5837 | && target->abiversion() < 2 |
627b30b7 AM |
5838 | && (gsym->can_use_relative_reloc(false) |
5839 | || data_shndx == ppc_object->opd_shndx()))) | |
2e702c99 | 5840 | { |
b3ccdeb5 AM |
5841 | Reloc_section* rela_dyn |
5842 | = target->rela_dyn_section(symtab, layout, is_ifunc); | |
5843 | unsigned int dynrel = (is_ifunc ? elfcpp::R_POWERPC_IRELATIVE | |
5844 | : elfcpp::R_POWERPC_RELATIVE); | |
e5d5f5ed AM |
5845 | rela_dyn->add_symbolless_global_addend( |
5846 | gsym, dynrel, output_section, object, data_shndx, | |
5847 | reloc.get_r_offset(), reloc.get_r_addend()); | |
2e702c99 RM |
5848 | } |
5849 | else | |
5850 | { | |
b3ccdeb5 AM |
5851 | Reloc_section* rela_dyn |
5852 | = target->rela_dyn_section(symtab, layout, is_ifunc); | |
42cacb20 | 5853 | check_non_pic(object, r_type); |
dd93cd0a AM |
5854 | rela_dyn->add_global(gsym, r_type, output_section, |
5855 | object, data_shndx, | |
5856 | reloc.get_r_offset(), | |
5857 | reloc.get_r_addend()); | |
2e702c99 RM |
5858 | } |
5859 | } | |
42cacb20 DE |
5860 | } |
5861 | break; | |
5862 | ||
cf43a2fe | 5863 | case elfcpp::R_PPC_PLTREL24: |
42cacb20 | 5864 | case elfcpp::R_POWERPC_REL24: |
b3ccdeb5 AM |
5865 | if (!is_ifunc) |
5866 | { | |
5867 | target->push_branch(ppc_object, data_shndx, reloc.get_r_offset(), | |
5868 | r_type, | |
5869 | elfcpp::elf_r_sym<size>(reloc.get_r_info()), | |
5870 | reloc.get_r_addend()); | |
5871 | if (gsym->needs_plt_entry() | |
5872 | || (!gsym->final_value_is_known() | |
5873 | && (gsym->is_undefined() | |
5874 | || gsym->is_from_dynobj() | |
5875 | || gsym->is_preemptible()))) | |
5876 | target->make_plt_entry(symtab, layout, gsym); | |
5877 | } | |
3ea0a085 | 5878 | // Fall thru |
42cacb20 | 5879 | |
3ea0a085 | 5880 | case elfcpp::R_PPC64_REL64: |
dd93cd0a | 5881 | case elfcpp::R_POWERPC_REL32: |
3ea0a085 | 5882 | // Make a dynamic relocation if necessary. |
88b8e639 | 5883 | if (gsym->needs_dynamic_reloc(Scan::get_reference_flags(r_type, target))) |
3ea0a085 AM |
5884 | { |
5885 | if (gsym->may_need_copy_reloc()) | |
5886 | { | |
5887 | target->copy_reloc(symtab, layout, object, | |
5888 | data_shndx, output_section, gsym, | |
5889 | reloc); | |
5890 | } | |
5891 | else | |
5892 | { | |
b3ccdeb5 AM |
5893 | Reloc_section* rela_dyn |
5894 | = target->rela_dyn_section(symtab, layout, is_ifunc); | |
3ea0a085 AM |
5895 | check_non_pic(object, r_type); |
5896 | rela_dyn->add_global(gsym, r_type, output_section, object, | |
5897 | data_shndx, reloc.get_r_offset(), | |
5898 | reloc.get_r_addend()); | |
5899 | } | |
5900 | } | |
5901 | break; | |
5902 | ||
ec661b9d AM |
5903 | case elfcpp::R_POWERPC_REL14: |
5904 | case elfcpp::R_POWERPC_REL14_BRTAKEN: | |
5905 | case elfcpp::R_POWERPC_REL14_BRNTAKEN: | |
b3ccdeb5 AM |
5906 | if (!is_ifunc) |
5907 | target->push_branch(ppc_object, data_shndx, reloc.get_r_offset(), | |
5908 | r_type, elfcpp::elf_r_sym<size>(reloc.get_r_info()), | |
5909 | reloc.get_r_addend()); | |
ec661b9d AM |
5910 | break; |
5911 | ||
6ce78956 AM |
5912 | case elfcpp::R_POWERPC_REL16: |
5913 | case elfcpp::R_POWERPC_REL16_LO: | |
5914 | case elfcpp::R_POWERPC_REL16_HI: | |
5915 | case elfcpp::R_POWERPC_REL16_HA: | |
dd93cd0a | 5916 | case elfcpp::R_POWERPC_SECTOFF: |
dd93cd0a | 5917 | case elfcpp::R_POWERPC_SECTOFF_LO: |
dd93cd0a | 5918 | case elfcpp::R_POWERPC_SECTOFF_HI: |
dd93cd0a | 5919 | case elfcpp::R_POWERPC_SECTOFF_HA: |
f9c6b907 AM |
5920 | case elfcpp::R_PPC64_SECTOFF_DS: |
5921 | case elfcpp::R_PPC64_SECTOFF_LO_DS: | |
5922 | case elfcpp::R_POWERPC_TPREL16: | |
5923 | case elfcpp::R_POWERPC_TPREL16_LO: | |
5924 | case elfcpp::R_POWERPC_TPREL16_HI: | |
dd93cd0a | 5925 | case elfcpp::R_POWERPC_TPREL16_HA: |
f9c6b907 AM |
5926 | case elfcpp::R_PPC64_TPREL16_DS: |
5927 | case elfcpp::R_PPC64_TPREL16_LO_DS: | |
5928 | case elfcpp::R_PPC64_TPREL16_HIGH: | |
5929 | case elfcpp::R_PPC64_TPREL16_HIGHA: | |
dd93cd0a | 5930 | case elfcpp::R_PPC64_TPREL16_HIGHER: |
dd93cd0a | 5931 | case elfcpp::R_PPC64_TPREL16_HIGHERA: |
dd93cd0a | 5932 | case elfcpp::R_PPC64_TPREL16_HIGHEST: |
dd93cd0a | 5933 | case elfcpp::R_PPC64_TPREL16_HIGHESTA: |
f9c6b907 AM |
5934 | case elfcpp::R_POWERPC_DTPREL16: |
5935 | case elfcpp::R_POWERPC_DTPREL16_LO: | |
5936 | case elfcpp::R_POWERPC_DTPREL16_HI: | |
5937 | case elfcpp::R_POWERPC_DTPREL16_HA: | |
dd93cd0a AM |
5938 | case elfcpp::R_PPC64_DTPREL16_DS: |
5939 | case elfcpp::R_PPC64_DTPREL16_LO_DS: | |
f9c6b907 AM |
5940 | case elfcpp::R_PPC64_DTPREL16_HIGH: |
5941 | case elfcpp::R_PPC64_DTPREL16_HIGHA: | |
5942 | case elfcpp::R_PPC64_DTPREL16_HIGHER: | |
5943 | case elfcpp::R_PPC64_DTPREL16_HIGHERA: | |
5944 | case elfcpp::R_PPC64_DTPREL16_HIGHEST: | |
5945 | case elfcpp::R_PPC64_DTPREL16_HIGHESTA: | |
dd93cd0a AM |
5946 | case elfcpp::R_PPC64_TLSGD: |
5947 | case elfcpp::R_PPC64_TLSLD: | |
45965137 | 5948 | case elfcpp::R_PPC64_ADDR64_LOCAL: |
cf43a2fe AM |
5949 | break; |
5950 | ||
42cacb20 DE |
5951 | case elfcpp::R_POWERPC_GOT16: |
5952 | case elfcpp::R_POWERPC_GOT16_LO: | |
5953 | case elfcpp::R_POWERPC_GOT16_HI: | |
5954 | case elfcpp::R_POWERPC_GOT16_HA: | |
dd93cd0a AM |
5955 | case elfcpp::R_PPC64_GOT16_DS: |
5956 | case elfcpp::R_PPC64_GOT16_LO_DS: | |
42cacb20 | 5957 | { |
c9269dff AM |
5958 | // The symbol requires a GOT entry. |
5959 | Output_data_got_powerpc<size, big_endian>* got; | |
42cacb20 DE |
5960 | |
5961 | got = target->got_section(symtab, layout); | |
2e702c99 | 5962 | if (gsym->final_value_is_known()) |
2e702c99 | 5963 | { |
9055360d AM |
5964 | if ((size == 32 && is_ifunc) |
5965 | || (size == 64 && target->abiversion() >= 2)) | |
e5d5f5ed AM |
5966 | got->add_global_plt(gsym, GOT_TYPE_STANDARD); |
5967 | else | |
5968 | got->add_global(gsym, GOT_TYPE_STANDARD); | |
5969 | } | |
5970 | else if (!gsym->has_got_offset(GOT_TYPE_STANDARD)) | |
5971 | { | |
5972 | // If we are generating a shared object or a pie, this | |
5973 | // symbol's GOT entry will be set by a dynamic relocation. | |
5974 | unsigned int off = got->add_constant(0); | |
5975 | gsym->set_got_offset(GOT_TYPE_STANDARD, off); | |
5976 | ||
b3ccdeb5 AM |
5977 | Reloc_section* rela_dyn |
5978 | = target->rela_dyn_section(symtab, layout, is_ifunc); | |
5979 | ||
e5d5f5ed | 5980 | if (gsym->can_use_relative_reloc(false) |
9055360d AM |
5981 | && !((size == 32 |
5982 | || target->abiversion() >= 2) | |
e5d5f5ed AM |
5983 | && gsym->visibility() == elfcpp::STV_PROTECTED |
5984 | && parameters->options().shared())) | |
2e702c99 | 5985 | { |
b3ccdeb5 AM |
5986 | unsigned int dynrel = (is_ifunc ? elfcpp::R_POWERPC_IRELATIVE |
5987 | : elfcpp::R_POWERPC_RELATIVE); | |
e5d5f5ed AM |
5988 | rela_dyn->add_global_relative(gsym, dynrel, got, off, 0, false); |
5989 | } | |
5990 | else | |
5991 | { | |
5992 | unsigned int dynrel = elfcpp::R_POWERPC_GLOB_DAT; | |
5993 | rela_dyn->add_global(gsym, dynrel, got, off, 0); | |
42cacb20 | 5994 | } |
2e702c99 | 5995 | } |
42cacb20 DE |
5996 | } |
5997 | break; | |
5998 | ||
cf43a2fe AM |
5999 | case elfcpp::R_PPC64_TOC16: |
6000 | case elfcpp::R_PPC64_TOC16_LO: | |
6001 | case elfcpp::R_PPC64_TOC16_HI: | |
6002 | case elfcpp::R_PPC64_TOC16_HA: | |
6003 | case elfcpp::R_PPC64_TOC16_DS: | |
6004 | case elfcpp::R_PPC64_TOC16_LO_DS: | |
42cacb20 DE |
6005 | // We need a GOT section. |
6006 | target->got_section(symtab, layout); | |
6007 | break; | |
6008 | ||
dd93cd0a AM |
6009 | case elfcpp::R_POWERPC_GOT_TLSGD16: |
6010 | case elfcpp::R_POWERPC_GOT_TLSGD16_LO: | |
6011 | case elfcpp::R_POWERPC_GOT_TLSGD16_HI: | |
6012 | case elfcpp::R_POWERPC_GOT_TLSGD16_HA: | |
6013 | { | |
6014 | const bool final = gsym->final_value_is_known(); | |
6015 | const tls::Tls_optimization tls_type = target->optimize_tls_gd(final); | |
6016 | if (tls_type == tls::TLSOPT_NONE) | |
6017 | { | |
6018 | Output_data_got_powerpc<size, big_endian>* got | |
6019 | = target->got_section(symtab, layout); | |
b3ccdeb5 AM |
6020 | Reloc_section* rela_dyn = target->rela_dyn_section(layout); |
6021 | got->add_global_pair_with_rel(gsym, GOT_TYPE_TLSGD, rela_dyn, | |
dd93cd0a AM |
6022 | elfcpp::R_POWERPC_DTPMOD, |
6023 | elfcpp::R_POWERPC_DTPREL); | |
6024 | } | |
6025 | else if (tls_type == tls::TLSOPT_TO_IE) | |
6026 | { | |
acc276d8 AM |
6027 | if (!gsym->has_got_offset(GOT_TYPE_TPREL)) |
6028 | { | |
6029 | Output_data_got_powerpc<size, big_endian>* got | |
6030 | = target->got_section(symtab, layout); | |
6031 | Reloc_section* rela_dyn = target->rela_dyn_section(layout); | |
6032 | if (gsym->is_undefined() | |
6033 | || gsym->is_from_dynobj()) | |
6034 | { | |
6035 | got->add_global_with_rel(gsym, GOT_TYPE_TPREL, rela_dyn, | |
6036 | elfcpp::R_POWERPC_TPREL); | |
6037 | } | |
6038 | else | |
6039 | { | |
6040 | unsigned int off = got->add_constant(0); | |
6041 | gsym->set_got_offset(GOT_TYPE_TPREL, off); | |
6042 | unsigned int dynrel = elfcpp::R_POWERPC_TPREL; | |
6043 | rela_dyn->add_symbolless_global_addend(gsym, dynrel, | |
6044 | got, off, 0); | |
6045 | } | |
6046 | } | |
dd93cd0a AM |
6047 | } |
6048 | else if (tls_type == tls::TLSOPT_TO_LE) | |
6049 | { | |
6050 | // no GOT relocs needed for Local Exec. | |
6051 | } | |
6052 | else | |
6053 | gold_unreachable(); | |
6054 | } | |
42cacb20 DE |
6055 | break; |
6056 | ||
dd93cd0a AM |
6057 | case elfcpp::R_POWERPC_GOT_TLSLD16: |
6058 | case elfcpp::R_POWERPC_GOT_TLSLD16_LO: | |
6059 | case elfcpp::R_POWERPC_GOT_TLSLD16_HI: | |
6060 | case elfcpp::R_POWERPC_GOT_TLSLD16_HA: | |
6061 | { | |
6062 | const tls::Tls_optimization tls_type = target->optimize_tls_ld(); | |
6063 | if (tls_type == tls::TLSOPT_NONE) | |
6064 | target->tlsld_got_offset(symtab, layout, object); | |
6065 | else if (tls_type == tls::TLSOPT_TO_LE) | |
6066 | { | |
6067 | // no GOT relocs needed for Local Exec. | |
7404fe1b AM |
6068 | if (parameters->options().emit_relocs()) |
6069 | { | |
6070 | Output_section* os = layout->tls_segment()->first_section(); | |
6071 | gold_assert(os != NULL); | |
6072 | os->set_needs_symtab_index(); | |
6073 | } | |
dd93cd0a AM |
6074 | } |
6075 | else | |
6076 | gold_unreachable(); | |
6077 | } | |
6078 | break; | |
6079 | ||
6080 | case elfcpp::R_POWERPC_GOT_DTPREL16: | |
6081 | case elfcpp::R_POWERPC_GOT_DTPREL16_LO: | |
6082 | case elfcpp::R_POWERPC_GOT_DTPREL16_HI: | |
6083 | case elfcpp::R_POWERPC_GOT_DTPREL16_HA: | |
6084 | { | |
6085 | Output_data_got_powerpc<size, big_endian>* got | |
6086 | = target->got_section(symtab, layout); | |
bd73a62d AM |
6087 | if (!gsym->final_value_is_known() |
6088 | && (gsym->is_from_dynobj() | |
6089 | || gsym->is_undefined() | |
6090 | || gsym->is_preemptible())) | |
6091 | got->add_global_with_rel(gsym, GOT_TYPE_DTPREL, | |
6092 | target->rela_dyn_section(layout), | |
6093 | elfcpp::R_POWERPC_DTPREL); | |
6094 | else | |
6095 | got->add_global_tls(gsym, GOT_TYPE_DTPREL); | |
dd93cd0a AM |
6096 | } |
6097 | break; | |
6098 | ||
6099 | case elfcpp::R_POWERPC_GOT_TPREL16: | |
6100 | case elfcpp::R_POWERPC_GOT_TPREL16_LO: | |
6101 | case elfcpp::R_POWERPC_GOT_TPREL16_HI: | |
6102 | case elfcpp::R_POWERPC_GOT_TPREL16_HA: | |
6103 | { | |
6104 | const bool final = gsym->final_value_is_known(); | |
6105 | const tls::Tls_optimization tls_type = target->optimize_tls_ie(final); | |
6106 | if (tls_type == tls::TLSOPT_NONE) | |
6107 | { | |
acc276d8 AM |
6108 | if (!gsym->has_got_offset(GOT_TYPE_TPREL)) |
6109 | { | |
6110 | Output_data_got_powerpc<size, big_endian>* got | |
6111 | = target->got_section(symtab, layout); | |
6112 | Reloc_section* rela_dyn = target->rela_dyn_section(layout); | |
6113 | if (gsym->is_undefined() | |
6114 | || gsym->is_from_dynobj()) | |
6115 | { | |
6116 | got->add_global_with_rel(gsym, GOT_TYPE_TPREL, rela_dyn, | |
6117 | elfcpp::R_POWERPC_TPREL); | |
6118 | } | |
6119 | else | |
6120 | { | |
6121 | unsigned int off = got->add_constant(0); | |
6122 | gsym->set_got_offset(GOT_TYPE_TPREL, off); | |
6123 | unsigned int dynrel = elfcpp::R_POWERPC_TPREL; | |
6124 | rela_dyn->add_symbolless_global_addend(gsym, dynrel, | |
6125 | got, off, 0); | |
6126 | } | |
6127 | } | |
dd93cd0a AM |
6128 | } |
6129 | else if (tls_type == tls::TLSOPT_TO_LE) | |
6130 | { | |
6131 | // no GOT relocs needed for Local Exec. | |
6132 | } | |
6133 | else | |
6134 | gold_unreachable(); | |
6135 | } | |
42cacb20 DE |
6136 | break; |
6137 | ||
6138 | default: | |
6139 | unsupported_reloc_global(object, r_type, gsym); | |
6140 | break; | |
6141 | } | |
d8f5a274 AM |
6142 | |
6143 | switch (r_type) | |
6144 | { | |
6145 | case elfcpp::R_POWERPC_GOT_TLSLD16: | |
6146 | case elfcpp::R_POWERPC_GOT_TLSGD16: | |
6147 | case elfcpp::R_POWERPC_GOT_TPREL16: | |
6148 | case elfcpp::R_POWERPC_GOT_DTPREL16: | |
6149 | case elfcpp::R_POWERPC_GOT16: | |
6150 | case elfcpp::R_PPC64_GOT16_DS: | |
6151 | case elfcpp::R_PPC64_TOC16: | |
6152 | case elfcpp::R_PPC64_TOC16_DS: | |
6153 | ppc_object->set_has_small_toc_reloc(); | |
6154 | default: | |
6155 | break; | |
6156 | } | |
42cacb20 DE |
6157 | } |
6158 | ||
6d03d481 ST |
6159 | // Process relocations for gc. |
6160 | ||
6161 | template<int size, bool big_endian> | |
6162 | void | |
6163 | Target_powerpc<size, big_endian>::gc_process_relocs( | |
d83ce4e3 AM |
6164 | Symbol_table* symtab, |
6165 | Layout* layout, | |
6166 | Sized_relobj_file<size, big_endian>* object, | |
6167 | unsigned int data_shndx, | |
6168 | unsigned int, | |
6169 | const unsigned char* prelocs, | |
6170 | size_t reloc_count, | |
6171 | Output_section* output_section, | |
6172 | bool needs_special_offset_handling, | |
6173 | size_t local_symbol_count, | |
6174 | const unsigned char* plocal_symbols) | |
6d03d481 ST |
6175 | { |
6176 | typedef Target_powerpc<size, big_endian> Powerpc; | |
2ea97941 | 6177 | typedef typename Target_powerpc<size, big_endian>::Scan Scan; |
e81fea4d AM |
6178 | Powerpc_relobj<size, big_endian>* ppc_object |
6179 | = static_cast<Powerpc_relobj<size, big_endian>*>(object); | |
6180 | if (size == 64) | |
6181 | ppc_object->set_opd_valid(); | |
6182 | if (size == 64 && data_shndx == ppc_object->opd_shndx()) | |
6183 | { | |
6184 | typename Powerpc_relobj<size, big_endian>::Access_from::iterator p; | |
6185 | for (p = ppc_object->access_from_map()->begin(); | |
6186 | p != ppc_object->access_from_map()->end(); | |
6187 | ++p) | |
6188 | { | |
6189 | Address dst_off = p->first; | |
6190 | unsigned int dst_indx = ppc_object->get_opd_ent(dst_off); | |
6191 | typename Powerpc_relobj<size, big_endian>::Section_refs::iterator s; | |
6192 | for (s = p->second.begin(); s != p->second.end(); ++s) | |
6193 | { | |
6194 | Object* src_obj = s->first; | |
6195 | unsigned int src_indx = s->second; | |
6196 | symtab->gc()->add_reference(src_obj, src_indx, | |
6197 | ppc_object, dst_indx); | |
6198 | } | |
6199 | p->second.clear(); | |
6200 | } | |
6201 | ppc_object->access_from_map()->clear(); | |
c6de8ed4 | 6202 | ppc_object->process_gc_mark(symtab); |
e81fea4d AM |
6203 | // Don't look at .opd relocs as .opd will reference everything. |
6204 | return; | |
6205 | } | |
6d03d481 | 6206 | |
41cbeecc | 6207 | gold::gc_process_relocs<size, big_endian, Powerpc, elfcpp::SHT_RELA, Scan, |
3ff2ccb0 | 6208 | typename Target_powerpc::Relocatable_size_for_reloc>( |
6d03d481 ST |
6209 | symtab, |
6210 | layout, | |
6211 | this, | |
6212 | object, | |
6213 | data_shndx, | |
6214 | prelocs, | |
6215 | reloc_count, | |
6216 | output_section, | |
6217 | needs_special_offset_handling, | |
6218 | local_symbol_count, | |
6219 | plocal_symbols); | |
6220 | } | |
6221 | ||
e81fea4d AM |
6222 | // Handle target specific gc actions when adding a gc reference from |
6223 | // SRC_OBJ, SRC_SHNDX to a location specified by DST_OBJ, DST_SHNDX | |
6224 | // and DST_OFF. For powerpc64, this adds a referenc to the code | |
6225 | // section of a function descriptor. | |
6226 | ||
6227 | template<int size, bool big_endian> | |
6228 | void | |
6229 | Target_powerpc<size, big_endian>::do_gc_add_reference( | |
6230 | Symbol_table* symtab, | |
6231 | Object* src_obj, | |
6232 | unsigned int src_shndx, | |
6233 | Object* dst_obj, | |
6234 | unsigned int dst_shndx, | |
6235 | Address dst_off) const | |
6236 | { | |
6c77229c AM |
6237 | if (size != 64 || dst_obj->is_dynamic()) |
6238 | return; | |
6239 | ||
e81fea4d AM |
6240 | Powerpc_relobj<size, big_endian>* ppc_object |
6241 | = static_cast<Powerpc_relobj<size, big_endian>*>(dst_obj); | |
a2d7bf59 | 6242 | if (dst_shndx != 0 && dst_shndx == ppc_object->opd_shndx()) |
e81fea4d AM |
6243 | { |
6244 | if (ppc_object->opd_valid()) | |
6245 | { | |
6246 | dst_shndx = ppc_object->get_opd_ent(dst_off); | |
6247 | symtab->gc()->add_reference(src_obj, src_shndx, dst_obj, dst_shndx); | |
6248 | } | |
6249 | else | |
6250 | { | |
6251 | // If we haven't run scan_opd_relocs, we must delay | |
6252 | // processing this function descriptor reference. | |
6253 | ppc_object->add_reference(src_obj, src_shndx, dst_off); | |
6254 | } | |
6255 | } | |
6256 | } | |
6257 | ||
6258 | // Add any special sections for this symbol to the gc work list. | |
6259 | // For powerpc64, this adds the code section of a function | |
6260 | // descriptor. | |
6261 | ||
6262 | template<int size, bool big_endian> | |
6263 | void | |
6264 | Target_powerpc<size, big_endian>::do_gc_mark_symbol( | |
6265 | Symbol_table* symtab, | |
6266 | Symbol* sym) const | |
6267 | { | |
6268 | if (size == 64) | |
6269 | { | |
6270 | Powerpc_relobj<size, big_endian>* ppc_object | |
6271 | = static_cast<Powerpc_relobj<size, big_endian>*>(sym->object()); | |
6272 | bool is_ordinary; | |
6273 | unsigned int shndx = sym->shndx(&is_ordinary); | |
a2d7bf59 | 6274 | if (is_ordinary && shndx != 0 && shndx == ppc_object->opd_shndx()) |
e81fea4d AM |
6275 | { |
6276 | Sized_symbol<size>* gsym = symtab->get_sized_symbol<size>(sym); | |
6277 | Address dst_off = gsym->value(); | |
c6de8ed4 AM |
6278 | if (ppc_object->opd_valid()) |
6279 | { | |
6280 | unsigned int dst_indx = ppc_object->get_opd_ent(dst_off); | |
6281 | symtab->gc()->worklist().push(Section_id(ppc_object, dst_indx)); | |
6282 | } | |
6283 | else | |
6284 | ppc_object->add_gc_mark(dst_off); | |
e81fea4d AM |
6285 | } |
6286 | } | |
6287 | } | |
6288 | ||
dc3714f3 AM |
6289 | // For a symbol location in .opd, set LOC to the location of the |
6290 | // function entry. | |
6291 | ||
6292 | template<int size, bool big_endian> | |
6293 | void | |
6294 | Target_powerpc<size, big_endian>::do_function_location( | |
6295 | Symbol_location* loc) const | |
6296 | { | |
a2d7bf59 | 6297 | if (size == 64 && loc->shndx != 0) |
dc3714f3 AM |
6298 | { |
6299 | if (loc->object->is_dynamic()) | |
6300 | { | |
6301 | Powerpc_dynobj<size, big_endian>* ppc_object | |
6302 | = static_cast<Powerpc_dynobj<size, big_endian>*>(loc->object); | |
6303 | if (loc->shndx == ppc_object->opd_shndx()) | |
6304 | { | |
6305 | Address dest_off; | |
6306 | Address off = loc->offset - ppc_object->opd_address(); | |
6307 | loc->shndx = ppc_object->get_opd_ent(off, &dest_off); | |
6308 | loc->offset = dest_off; | |
6309 | } | |
6310 | } | |
6311 | else | |
6312 | { | |
6313 | const Powerpc_relobj<size, big_endian>* ppc_object | |
6314 | = static_cast<const Powerpc_relobj<size, big_endian>*>(loc->object); | |
6315 | if (loc->shndx == ppc_object->opd_shndx()) | |
6316 | { | |
6317 | Address dest_off; | |
6318 | loc->shndx = ppc_object->get_opd_ent(loc->offset, &dest_off); | |
6319 | loc->offset = dest_off; | |
6320 | } | |
6321 | } | |
6322 | } | |
6323 | } | |
6324 | ||
42cacb20 DE |
6325 | // Scan relocations for a section. |
6326 | ||
6327 | template<int size, bool big_endian> | |
6328 | void | |
6329 | Target_powerpc<size, big_endian>::scan_relocs( | |
d83ce4e3 AM |
6330 | Symbol_table* symtab, |
6331 | Layout* layout, | |
6332 | Sized_relobj_file<size, big_endian>* object, | |
6333 | unsigned int data_shndx, | |
6334 | unsigned int sh_type, | |
6335 | const unsigned char* prelocs, | |
6336 | size_t reloc_count, | |
6337 | Output_section* output_section, | |
6338 | bool needs_special_offset_handling, | |
6339 | size_t local_symbol_count, | |
6340 | const unsigned char* plocal_symbols) | |
42cacb20 DE |
6341 | { |
6342 | typedef Target_powerpc<size, big_endian> Powerpc; | |
2ea97941 | 6343 | typedef typename Target_powerpc<size, big_endian>::Scan Scan; |
42cacb20 DE |
6344 | |
6345 | if (sh_type == elfcpp::SHT_REL) | |
6346 | { | |
6347 | gold_error(_("%s: unsupported REL reloc section"), | |
6348 | object->name().c_str()); | |
6349 | return; | |
6350 | } | |
6351 | ||
2ea97941 | 6352 | gold::scan_relocs<size, big_endian, Powerpc, elfcpp::SHT_RELA, Scan>( |
42cacb20 DE |
6353 | symtab, |
6354 | layout, | |
6355 | this, | |
6356 | object, | |
6357 | data_shndx, | |
6358 | prelocs, | |
6359 | reloc_count, | |
6360 | output_section, | |
6361 | needs_special_offset_handling, | |
6362 | local_symbol_count, | |
6363 | plocal_symbols); | |
6364 | } | |
6365 | ||
ec4dbad3 AM |
6366 | // Functor class for processing the global symbol table. |
6367 | // Removes symbols defined on discarded opd entries. | |
6368 | ||
6369 | template<bool big_endian> | |
6370 | class Global_symbol_visitor_opd | |
6371 | { | |
6372 | public: | |
6373 | Global_symbol_visitor_opd() | |
6374 | { } | |
6375 | ||
6376 | void | |
6377 | operator()(Sized_symbol<64>* sym) | |
6378 | { | |
6379 | if (sym->has_symtab_index() | |
6380 | || sym->source() != Symbol::FROM_OBJECT | |
6381 | || !sym->in_real_elf()) | |
6382 | return; | |
6383 | ||
6c77229c AM |
6384 | if (sym->object()->is_dynamic()) |
6385 | return; | |
6386 | ||
ec4dbad3 AM |
6387 | Powerpc_relobj<64, big_endian>* symobj |
6388 | = static_cast<Powerpc_relobj<64, big_endian>*>(sym->object()); | |
6c77229c | 6389 | if (symobj->opd_shndx() == 0) |
ec4dbad3 AM |
6390 | return; |
6391 | ||
6392 | bool is_ordinary; | |
6393 | unsigned int shndx = sym->shndx(&is_ordinary); | |
6394 | if (shndx == symobj->opd_shndx() | |
6395 | && symobj->get_opd_discard(sym->value())) | |
6396 | sym->set_symtab_index(-1U); | |
6397 | } | |
6398 | }; | |
6399 | ||
f3a0ed29 AM |
6400 | template<int size, bool big_endian> |
6401 | void | |
6402 | Target_powerpc<size, big_endian>::define_save_restore_funcs( | |
6403 | Layout* layout, | |
6404 | Symbol_table* symtab) | |
6405 | { | |
6406 | if (size == 64) | |
6407 | { | |
6408 | Output_data_save_res<64, big_endian>* savres | |
6409 | = new Output_data_save_res<64, big_endian>(symtab); | |
6410 | layout->add_output_section_data(".text", elfcpp::SHT_PROGBITS, | |
6411 | elfcpp::SHF_ALLOC | elfcpp::SHF_EXECINSTR, | |
6412 | savres, ORDER_TEXT, false); | |
6413 | } | |
6414 | } | |
6415 | ||
d8f5a274 AM |
6416 | // Sort linker created .got section first (for the header), then input |
6417 | // sections belonging to files using small model code. | |
6418 | ||
6419 | template<bool big_endian> | |
6420 | class Sort_toc_sections | |
6421 | { | |
6422 | public: | |
6423 | bool | |
6424 | operator()(const Output_section::Input_section& is1, | |
6425 | const Output_section::Input_section& is2) const | |
6426 | { | |
6427 | if (!is1.is_input_section() && is2.is_input_section()) | |
6428 | return true; | |
6429 | bool small1 | |
6430 | = (is1.is_input_section() | |
6431 | && (static_cast<const Powerpc_relobj<64, big_endian>*>(is1.relobj()) | |
6432 | ->has_small_toc_reloc())); | |
6433 | bool small2 | |
6434 | = (is2.is_input_section() | |
6435 | && (static_cast<const Powerpc_relobj<64, big_endian>*>(is2.relobj()) | |
6436 | ->has_small_toc_reloc())); | |
6437 | return small1 && !small2; | |
6438 | } | |
6439 | }; | |
6440 | ||
42cacb20 DE |
6441 | // Finalize the sections. |
6442 | ||
6443 | template<int size, bool big_endian> | |
6444 | void | |
d5b40221 DK |
6445 | Target_powerpc<size, big_endian>::do_finalize_sections( |
6446 | Layout* layout, | |
f59f41f3 | 6447 | const Input_objects*, |
ec4dbad3 | 6448 | Symbol_table* symtab) |
42cacb20 | 6449 | { |
c9824451 AM |
6450 | if (parameters->doing_static_link()) |
6451 | { | |
6452 | // At least some versions of glibc elf-init.o have a strong | |
6453 | // reference to __rela_iplt marker syms. A weak ref would be | |
6454 | // better.. | |
6455 | if (this->iplt_ != NULL) | |
6456 | { | |
6457 | Reloc_section* rel = this->iplt_->rel_plt(); | |
6458 | symtab->define_in_output_data("__rela_iplt_start", NULL, | |
6459 | Symbol_table::PREDEFINED, rel, 0, 0, | |
6460 | elfcpp::STT_NOTYPE, elfcpp::STB_GLOBAL, | |
6461 | elfcpp::STV_HIDDEN, 0, false, true); | |
6462 | symtab->define_in_output_data("__rela_iplt_end", NULL, | |
6463 | Symbol_table::PREDEFINED, rel, 0, 0, | |
6464 | elfcpp::STT_NOTYPE, elfcpp::STB_GLOBAL, | |
6465 | elfcpp::STV_HIDDEN, 0, true, true); | |
6466 | } | |
6467 | else | |
6468 | { | |
6469 | symtab->define_as_constant("__rela_iplt_start", NULL, | |
6470 | Symbol_table::PREDEFINED, 0, 0, | |
6471 | elfcpp::STT_NOTYPE, elfcpp::STB_GLOBAL, | |
6472 | elfcpp::STV_HIDDEN, 0, true, false); | |
6473 | symtab->define_as_constant("__rela_iplt_end", NULL, | |
6474 | Symbol_table::PREDEFINED, 0, 0, | |
6475 | elfcpp::STT_NOTYPE, elfcpp::STB_GLOBAL, | |
6476 | elfcpp::STV_HIDDEN, 0, true, false); | |
6477 | } | |
6478 | } | |
6479 | ||
ec4dbad3 AM |
6480 | if (size == 64) |
6481 | { | |
6482 | typedef Global_symbol_visitor_opd<big_endian> Symbol_visitor; | |
6483 | symtab->for_all_symbols<64, Symbol_visitor>(Symbol_visitor()); | |
ec661b9d AM |
6484 | |
6485 | if (!parameters->options().relocatable()) | |
6486 | { | |
6487 | this->define_save_restore_funcs(layout, symtab); | |
6488 | ||
6489 | // Annoyingly, we need to make these sections now whether or | |
6490 | // not we need them. If we delay until do_relax then we | |
6491 | // need to mess with the relaxation machinery checkpointing. | |
6492 | this->got_section(symtab, layout); | |
6493 | this->make_brlt_section(layout); | |
d8f5a274 AM |
6494 | |
6495 | if (parameters->options().toc_sort()) | |
6496 | { | |
6497 | Output_section* os = this->got_->output_section(); | |
6498 | if (os != NULL && os->input_sections().size() > 1) | |
6499 | std::stable_sort(os->input_sections().begin(), | |
6500 | os->input_sections().end(), | |
6501 | Sort_toc_sections<big_endian>()); | |
6502 | } | |
ec661b9d | 6503 | } |
ec4dbad3 AM |
6504 | } |
6505 | ||
42cacb20 | 6506 | // Fill in some more dynamic tags. |
c9269dff | 6507 | Output_data_dynamic* odyn = layout->dynamic_data(); |
c9824451 | 6508 | if (odyn != NULL) |
cf43a2fe | 6509 | { |
c9824451 AM |
6510 | const Reloc_section* rel_plt = (this->plt_ == NULL |
6511 | ? NULL | |
6512 | : this->plt_->rel_plt()); | |
6513 | layout->add_target_dynamic_tags(false, this->plt_, rel_plt, | |
6514 | this->rela_dyn_, true, size == 32); | |
6515 | ||
6516 | if (size == 32) | |
dd93cd0a | 6517 | { |
c9824451 AM |
6518 | if (this->got_ != NULL) |
6519 | { | |
6520 | this->got_->finalize_data_size(); | |
6521 | odyn->add_section_plus_offset(elfcpp::DT_PPC_GOT, | |
6522 | this->got_, this->got_->g_o_t()); | |
6523 | } | |
dd93cd0a | 6524 | } |
c9824451 | 6525 | else |
dd93cd0a | 6526 | { |
c9824451 AM |
6527 | if (this->glink_ != NULL) |
6528 | { | |
6529 | this->glink_->finalize_data_size(); | |
6530 | odyn->add_section_plus_offset(elfcpp::DT_PPC64_GLINK, | |
6531 | this->glink_, | |
ec661b9d | 6532 | (this->glink_->pltresolve_size |
c9824451 AM |
6533 | - 32)); |
6534 | } | |
dd93cd0a | 6535 | } |
c9269dff | 6536 | } |
cf43a2fe | 6537 | |
42cacb20 DE |
6538 | // Emit any relocs we saved in an attempt to avoid generating COPY |
6539 | // relocs. | |
6540 | if (this->copy_relocs_.any_saved_relocs()) | |
6541 | this->copy_relocs_.emit(this->rela_dyn_section(layout)); | |
6542 | } | |
6543 | ||
aba6bc71 AM |
6544 | // Return TRUE iff INSN is one we expect on a _LO variety toc/got |
6545 | // reloc. | |
6546 | ||
6547 | static bool | |
6548 | ok_lo_toc_insn(uint32_t insn) | |
6549 | { | |
6550 | return ((insn & (0x3f << 26)) == 14u << 26 /* addi */ | |
6551 | || (insn & (0x3f << 26)) == 32u << 26 /* lwz */ | |
6552 | || (insn & (0x3f << 26)) == 34u << 26 /* lbz */ | |
6553 | || (insn & (0x3f << 26)) == 36u << 26 /* stw */ | |
6554 | || (insn & (0x3f << 26)) == 38u << 26 /* stb */ | |
6555 | || (insn & (0x3f << 26)) == 40u << 26 /* lhz */ | |
6556 | || (insn & (0x3f << 26)) == 42u << 26 /* lha */ | |
6557 | || (insn & (0x3f << 26)) == 44u << 26 /* sth */ | |
6558 | || (insn & (0x3f << 26)) == 46u << 26 /* lmw */ | |
6559 | || (insn & (0x3f << 26)) == 47u << 26 /* stmw */ | |
6560 | || (insn & (0x3f << 26)) == 48u << 26 /* lfs */ | |
6561 | || (insn & (0x3f << 26)) == 50u << 26 /* lfd */ | |
6562 | || (insn & (0x3f << 26)) == 52u << 26 /* stfs */ | |
6563 | || (insn & (0x3f << 26)) == 54u << 26 /* stfd */ | |
6564 | || ((insn & (0x3f << 26)) == 58u << 26 /* lwa,ld,lmd */ | |
6565 | && (insn & 3) != 1) | |
6566 | || ((insn & (0x3f << 26)) == 62u << 26 /* std, stmd */ | |
6567 | && ((insn & 3) == 0 || (insn & 3) == 3)) | |
6568 | || (insn & (0x3f << 26)) == 12u << 26 /* addic */); | |
6569 | } | |
6570 | ||
3ea0a085 AM |
6571 | // Return the value to use for a branch relocation. |
6572 | ||
6573 | template<int size, bool big_endian> | |
ec5b8187 | 6574 | typename Target_powerpc<size, big_endian>::Address |
3ea0a085 | 6575 | Target_powerpc<size, big_endian>::symval_for_branch( |
6c77229c | 6576 | const Symbol_table* symtab, |
3ea0a085 AM |
6577 | Address value, |
6578 | const Sized_symbol<size>* gsym, | |
6579 | Powerpc_relobj<size, big_endian>* object, | |
6580 | unsigned int *dest_shndx) | |
6581 | { | |
9055360d AM |
6582 | if (size == 32 || this->abiversion() >= 2) |
6583 | gold_unreachable(); | |
3ea0a085 | 6584 | *dest_shndx = 0; |
3ea0a085 AM |
6585 | |
6586 | // If the symbol is defined in an opd section, ie. is a function | |
6587 | // descriptor, use the function descriptor code entry address | |
6588 | Powerpc_relobj<size, big_endian>* symobj = object; | |
f3a0ed29 AM |
6589 | if (gsym != NULL |
6590 | && gsym->source() != Symbol::FROM_OBJECT) | |
6591 | return value; | |
3ea0a085 AM |
6592 | if (gsym != NULL) |
6593 | symobj = static_cast<Powerpc_relobj<size, big_endian>*>(gsym->object()); | |
6594 | unsigned int shndx = symobj->opd_shndx(); | |
6595 | if (shndx == 0) | |
6596 | return value; | |
6597 | Address opd_addr = symobj->get_output_section_offset(shndx); | |
a2d7bf59 AM |
6598 | if (opd_addr == invalid_address) |
6599 | return value; | |
c6905c28 | 6600 | opd_addr += symobj->output_section_address(shndx); |
3ea0a085 AM |
6601 | if (value >= opd_addr && value < opd_addr + symobj->section_size(shndx)) |
6602 | { | |
6603 | Address sec_off; | |
e81fea4d | 6604 | *dest_shndx = symobj->get_opd_ent(value - opd_addr, &sec_off); |
6c77229c AM |
6605 | if (symtab->is_section_folded(symobj, *dest_shndx)) |
6606 | { | |
6607 | Section_id folded | |
6608 | = symtab->icf()->get_folded_section(symobj, *dest_shndx); | |
6609 | symobj = static_cast<Powerpc_relobj<size, big_endian>*>(folded.first); | |
6610 | *dest_shndx = folded.second; | |
6611 | } | |
3ea0a085 AM |
6612 | Address sec_addr = symobj->get_output_section_offset(*dest_shndx); |
6613 | gold_assert(sec_addr != invalid_address); | |
6614 | sec_addr += symobj->output_section(*dest_shndx)->address(); | |
6615 | value = sec_addr + sec_off; | |
6616 | } | |
6617 | return value; | |
6618 | } | |
6619 | ||
42cacb20 DE |
6620 | // Perform a relocation. |
6621 | ||
6622 | template<int size, bool big_endian> | |
6623 | inline bool | |
6624 | Target_powerpc<size, big_endian>::Relocate::relocate( | |
d83ce4e3 AM |
6625 | const Relocate_info<size, big_endian>* relinfo, |
6626 | Target_powerpc* target, | |
6627 | Output_section* os, | |
6628 | size_t relnum, | |
6629 | const elfcpp::Rela<size, big_endian>& rela, | |
6630 | unsigned int r_type, | |
6631 | const Sized_symbol<size>* gsym, | |
6632 | const Symbol_value<size>* psymval, | |
6633 | unsigned char* view, | |
c9269dff AM |
6634 | Address address, |
6635 | section_size_type view_size) | |
42cacb20 | 6636 | { |
0e804863 ILT |
6637 | if (view == NULL) |
6638 | return true; | |
6639 | ||
e3deeb9c | 6640 | switch (this->maybe_skip_tls_get_addr_call(r_type, gsym)) |
dd93cd0a | 6641 | { |
e3deeb9c AM |
6642 | case Track_tls::NOT_EXPECTED: |
6643 | gold_error_at_location(relinfo, relnum, rela.get_r_offset(), | |
6644 | _("__tls_get_addr call lacks marker reloc")); | |
6645 | break; | |
6646 | case Track_tls::EXPECTED: | |
6647 | // We have already complained. | |
6648 | break; | |
6649 | case Track_tls::SKIP: | |
6650 | return true; | |
6651 | case Track_tls::NORMAL: | |
6652 | break; | |
dd93cd0a | 6653 | } |
dd93cd0a | 6654 | |
42cacb20 | 6655 | typedef Powerpc_relocate_functions<size, big_endian> Reloc; |
dd93cd0a | 6656 | typedef typename elfcpp::Swap<32, big_endian>::Valtype Insn; |
3ea0a085 AM |
6657 | Powerpc_relobj<size, big_endian>* const object |
6658 | = static_cast<Powerpc_relobj<size, big_endian>*>(relinfo->object); | |
dd93cd0a AM |
6659 | Address value = 0; |
6660 | bool has_plt_value = false; | |
e5d5f5ed | 6661 | unsigned int r_sym = elfcpp::elf_r_sym<size>(rela.get_r_info()); |
b3ccdeb5 | 6662 | if ((gsym != NULL |
88b8e639 | 6663 | ? gsym->use_plt_offset(Scan::get_reference_flags(r_type, target)) |
b3ccdeb5 AM |
6664 | : object->local_has_plt_offset(r_sym)) |
6665 | && (!psymval->is_ifunc_symbol() | |
9055360d | 6666 | || Scan::reloc_needs_plt_for_ifunc(target, object, r_type, false))) |
dd93cd0a | 6667 | { |
9055360d AM |
6668 | if (size == 64 |
6669 | && gsym != NULL | |
6670 | && target->abiversion() >= 2 | |
6671 | && !parameters->options().output_is_position_independent() | |
6672 | && !is_branch_reloc(r_type)) | |
ec661b9d | 6673 | { |
9055360d AM |
6674 | unsigned int off = target->glink_section()->find_global_entry(gsym); |
6675 | gold_assert(off != (unsigned int)-1); | |
6676 | value = target->glink_section()->global_entry_address() + off; | |
ec661b9d | 6677 | } |
c9824451 | 6678 | else |
9055360d AM |
6679 | { |
6680 | Stub_table<size, big_endian>* stub_table | |
6681 | = object->stub_table(relinfo->data_shndx); | |
6682 | if (stub_table == NULL) | |
6683 | { | |
6684 | // This is a ref from a data section to an ifunc symbol. | |
6685 | if (target->stub_tables().size() != 0) | |
6686 | stub_table = target->stub_tables()[0]; | |
6687 | } | |
6688 | gold_assert(stub_table != NULL); | |
6689 | Address off; | |
6690 | if (gsym != NULL) | |
6691 | off = stub_table->find_plt_call_entry(object, gsym, r_type, | |
6692 | rela.get_r_addend()); | |
6693 | else | |
6694 | off = stub_table->find_plt_call_entry(object, r_sym, r_type, | |
6695 | rela.get_r_addend()); | |
6696 | gold_assert(off != invalid_address); | |
6697 | value = stub_table->stub_address() + off; | |
6698 | } | |
dd93cd0a AM |
6699 | has_plt_value = true; |
6700 | } | |
cf43a2fe AM |
6701 | |
6702 | if (r_type == elfcpp::R_POWERPC_GOT16 | |
6703 | || r_type == elfcpp::R_POWERPC_GOT16_LO | |
6704 | || r_type == elfcpp::R_POWERPC_GOT16_HI | |
6705 | || r_type == elfcpp::R_POWERPC_GOT16_HA | |
6706 | || r_type == elfcpp::R_PPC64_GOT16_DS | |
6707 | || r_type == elfcpp::R_PPC64_GOT16_LO_DS) | |
42cacb20 | 6708 | { |
cf43a2fe AM |
6709 | if (gsym != NULL) |
6710 | { | |
6711 | gold_assert(gsym->has_got_offset(GOT_TYPE_STANDARD)); | |
6712 | value = gsym->got_offset(GOT_TYPE_STANDARD); | |
6713 | } | |
6714 | else | |
6715 | { | |
6716 | unsigned int r_sym = elfcpp::elf_r_sym<size>(rela.get_r_info()); | |
6717 | gold_assert(object->local_has_got_offset(r_sym, GOT_TYPE_STANDARD)); | |
6718 | value = object->local_got_offset(r_sym, GOT_TYPE_STANDARD); | |
6719 | } | |
dd93cd0a | 6720 | value -= target->got_section()->got_base_offset(object); |
cf43a2fe AM |
6721 | } |
6722 | else if (r_type == elfcpp::R_PPC64_TOC) | |
6723 | { | |
c9269dff | 6724 | value = (target->got_section()->output_section()->address() |
dd93cd0a | 6725 | + object->toc_base_offset()); |
cf43a2fe AM |
6726 | } |
6727 | else if (gsym != NULL | |
6728 | && (r_type == elfcpp::R_POWERPC_REL24 | |
6729 | || r_type == elfcpp::R_PPC_PLTREL24) | |
dd93cd0a | 6730 | && has_plt_value) |
cf43a2fe | 6731 | { |
c9269dff AM |
6732 | if (size == 64) |
6733 | { | |
6734 | typedef typename elfcpp::Swap<32, big_endian>::Valtype Valtype; | |
6735 | Valtype* wv = reinterpret_cast<Valtype*>(view); | |
6736 | bool can_plt_call = false; | |
6737 | if (rela.get_r_offset() + 8 <= view_size) | |
6738 | { | |
3ea0a085 | 6739 | Valtype insn = elfcpp::Swap<32, big_endian>::readval(wv); |
c9269dff | 6740 | Valtype insn2 = elfcpp::Swap<32, big_endian>::readval(wv + 1); |
3ea0a085 AM |
6741 | if ((insn & 1) != 0 |
6742 | && (insn2 == nop | |
6743 | || insn2 == cror_15_15_15 || insn2 == cror_31_31_31)) | |
c9269dff | 6744 | { |
b4f7960d AM |
6745 | elfcpp::Swap<32, big_endian>:: |
6746 | writeval(wv + 1, ld_2_1 + target->stk_toc()); | |
c9269dff AM |
6747 | can_plt_call = true; |
6748 | } | |
6749 | } | |
6750 | if (!can_plt_call) | |
3ea0a085 AM |
6751 | { |
6752 | // If we don't have a branch and link followed by a nop, | |
6753 | // we can't go via the plt because there is no place to | |
6754 | // put a toc restoring instruction. | |
6755 | // Unless we know we won't be returning. | |
6756 | if (strcmp(gsym->name(), "__libc_start_main") == 0) | |
6757 | can_plt_call = true; | |
6758 | } | |
6759 | if (!can_plt_call) | |
6760 | { | |
ba8ca3e7 AM |
6761 | // g++ as of 20130507 emits self-calls without a |
6762 | // following nop. This is arguably wrong since we have | |
6763 | // conflicting information. On the one hand a global | |
6764 | // symbol and on the other a local call sequence, but | |
6765 | // don't error for this special case. | |
6766 | // It isn't possible to cheaply verify we have exactly | |
6767 | // such a call. Allow all calls to the same section. | |
3ea0a085 | 6768 | bool ok = false; |
c9824451 | 6769 | Address code = value; |
3ea0a085 AM |
6770 | if (gsym->source() == Symbol::FROM_OBJECT |
6771 | && gsym->object() == object) | |
6772 | { | |
9055360d AM |
6773 | unsigned int dest_shndx = 0; |
6774 | if (target->abiversion() < 2) | |
6775 | { | |
6776 | Address addend = rela.get_r_addend(); | |
6777 | Address opdent = psymval->value(object, addend); | |
6778 | code = target->symval_for_branch(relinfo->symtab, | |
6779 | opdent, gsym, object, | |
6780 | &dest_shndx); | |
6781 | } | |
3ea0a085 AM |
6782 | bool is_ordinary; |
6783 | if (dest_shndx == 0) | |
6784 | dest_shndx = gsym->shndx(&is_ordinary); | |
6785 | ok = dest_shndx == relinfo->data_shndx; | |
6786 | } | |
6787 | if (!ok) | |
c9824451 AM |
6788 | { |
6789 | gold_error_at_location(relinfo, relnum, rela.get_r_offset(), | |
6790 | _("call lacks nop, can't restore toc; " | |
6791 | "recompile with -fPIC")); | |
6792 | value = code; | |
6793 | } | |
3ea0a085 | 6794 | } |
c9269dff | 6795 | } |
cf43a2fe | 6796 | } |
dd93cd0a AM |
6797 | else if (r_type == elfcpp::R_POWERPC_GOT_TLSGD16 |
6798 | || r_type == elfcpp::R_POWERPC_GOT_TLSGD16_LO | |
6799 | || r_type == elfcpp::R_POWERPC_GOT_TLSGD16_HI | |
6800 | || r_type == elfcpp::R_POWERPC_GOT_TLSGD16_HA) | |
6801 | { | |
6802 | // First instruction of a global dynamic sequence, arg setup insn. | |
6803 | const bool final = gsym == NULL || gsym->final_value_is_known(); | |
6804 | const tls::Tls_optimization tls_type = target->optimize_tls_gd(final); | |
6805 | enum Got_type got_type = GOT_TYPE_STANDARD; | |
6806 | if (tls_type == tls::TLSOPT_NONE) | |
6807 | got_type = GOT_TYPE_TLSGD; | |
6808 | else if (tls_type == tls::TLSOPT_TO_IE) | |
6809 | got_type = GOT_TYPE_TPREL; | |
6810 | if (got_type != GOT_TYPE_STANDARD) | |
6811 | { | |
6812 | if (gsym != NULL) | |
6813 | { | |
6814 | gold_assert(gsym->has_got_offset(got_type)); | |
6815 | value = gsym->got_offset(got_type); | |
6816 | } | |
6817 | else | |
6818 | { | |
6819 | unsigned int r_sym = elfcpp::elf_r_sym<size>(rela.get_r_info()); | |
6820 | gold_assert(object->local_has_got_offset(r_sym, got_type)); | |
6821 | value = object->local_got_offset(r_sym, got_type); | |
6822 | } | |
6823 | value -= target->got_section()->got_base_offset(object); | |
6824 | } | |
6825 | if (tls_type == tls::TLSOPT_TO_IE) | |
6826 | { | |
6827 | if (r_type == elfcpp::R_POWERPC_GOT_TLSGD16 | |
6828 | || r_type == elfcpp::R_POWERPC_GOT_TLSGD16_LO) | |
6829 | { | |
6830 | Insn* iview = reinterpret_cast<Insn*>(view - 2 * big_endian); | |
6831 | Insn insn = elfcpp::Swap<32, big_endian>::readval(iview); | |
6832 | insn &= (1 << 26) - (1 << 16); // extract rt,ra from addi | |
6833 | if (size == 32) | |
6834 | insn |= 32 << 26; // lwz | |
6835 | else | |
6836 | insn |= 58 << 26; // ld | |
6837 | elfcpp::Swap<32, big_endian>::writeval(iview, insn); | |
6838 | } | |
6839 | r_type += (elfcpp::R_POWERPC_GOT_TPREL16 | |
6840 | - elfcpp::R_POWERPC_GOT_TLSGD16); | |
6841 | } | |
6842 | else if (tls_type == tls::TLSOPT_TO_LE) | |
6843 | { | |
6844 | if (r_type == elfcpp::R_POWERPC_GOT_TLSGD16 | |
6845 | || r_type == elfcpp::R_POWERPC_GOT_TLSGD16_LO) | |
6846 | { | |
6847 | Insn* iview = reinterpret_cast<Insn*>(view - 2 * big_endian); | |
6848 | Insn insn = addis_3_13; | |
6849 | if (size == 32) | |
6850 | insn = addis_3_2; | |
6851 | elfcpp::Swap<32, big_endian>::writeval(iview, insn); | |
6852 | r_type = elfcpp::R_POWERPC_TPREL16_HA; | |
6853 | value = psymval->value(object, rela.get_r_addend()); | |
6854 | } | |
6855 | else | |
6856 | { | |
6857 | Insn* iview = reinterpret_cast<Insn*>(view - 2 * big_endian); | |
6858 | Insn insn = nop; | |
6859 | elfcpp::Swap<32, big_endian>::writeval(iview, insn); | |
6860 | r_type = elfcpp::R_POWERPC_NONE; | |
6861 | } | |
6862 | } | |
6863 | } | |
6864 | else if (r_type == elfcpp::R_POWERPC_GOT_TLSLD16 | |
6865 | || r_type == elfcpp::R_POWERPC_GOT_TLSLD16_LO | |
6866 | || r_type == elfcpp::R_POWERPC_GOT_TLSLD16_HI | |
6867 | || r_type == elfcpp::R_POWERPC_GOT_TLSLD16_HA) | |
6868 | { | |
6869 | // First instruction of a local dynamic sequence, arg setup insn. | |
6870 | const tls::Tls_optimization tls_type = target->optimize_tls_ld(); | |
6871 | if (tls_type == tls::TLSOPT_NONE) | |
6872 | { | |
6873 | value = target->tlsld_got_offset(); | |
6874 | value -= target->got_section()->got_base_offset(object); | |
6875 | } | |
6876 | else | |
6877 | { | |
6878 | gold_assert(tls_type == tls::TLSOPT_TO_LE); | |
6879 | if (r_type == elfcpp::R_POWERPC_GOT_TLSLD16 | |
6880 | || r_type == elfcpp::R_POWERPC_GOT_TLSLD16_LO) | |
6881 | { | |
6882 | Insn* iview = reinterpret_cast<Insn*>(view - 2 * big_endian); | |
6883 | Insn insn = addis_3_13; | |
6884 | if (size == 32) | |
6885 | insn = addis_3_2; | |
6886 | elfcpp::Swap<32, big_endian>::writeval(iview, insn); | |
6887 | r_type = elfcpp::R_POWERPC_TPREL16_HA; | |
7404fe1b | 6888 | value = dtp_offset; |
dd93cd0a AM |
6889 | } |
6890 | else | |
6891 | { | |
6892 | Insn* iview = reinterpret_cast<Insn*>(view - 2 * big_endian); | |
6893 | Insn insn = nop; | |
6894 | elfcpp::Swap<32, big_endian>::writeval(iview, insn); | |
6895 | r_type = elfcpp::R_POWERPC_NONE; | |
6896 | } | |
6897 | } | |
6898 | } | |
6899 | else if (r_type == elfcpp::R_POWERPC_GOT_DTPREL16 | |
6900 | || r_type == elfcpp::R_POWERPC_GOT_DTPREL16_LO | |
6901 | || r_type == elfcpp::R_POWERPC_GOT_DTPREL16_HI | |
6902 | || r_type == elfcpp::R_POWERPC_GOT_DTPREL16_HA) | |
6903 | { | |
6904 | // Accesses relative to a local dynamic sequence address, | |
6905 | // no optimisation here. | |
6906 | if (gsym != NULL) | |
6907 | { | |
6908 | gold_assert(gsym->has_got_offset(GOT_TYPE_DTPREL)); | |
6909 | value = gsym->got_offset(GOT_TYPE_DTPREL); | |
6910 | } | |
6911 | else | |
6912 | { | |
6913 | unsigned int r_sym = elfcpp::elf_r_sym<size>(rela.get_r_info()); | |
6914 | gold_assert(object->local_has_got_offset(r_sym, GOT_TYPE_DTPREL)); | |
6915 | value = object->local_got_offset(r_sym, GOT_TYPE_DTPREL); | |
6916 | } | |
6917 | value -= target->got_section()->got_base_offset(object); | |
6918 | } | |
6919 | else if (r_type == elfcpp::R_POWERPC_GOT_TPREL16 | |
6920 | || r_type == elfcpp::R_POWERPC_GOT_TPREL16_LO | |
6921 | || r_type == elfcpp::R_POWERPC_GOT_TPREL16_HI | |
6922 | || r_type == elfcpp::R_POWERPC_GOT_TPREL16_HA) | |
6923 | { | |
6924 | // First instruction of initial exec sequence. | |
6925 | const bool final = gsym == NULL || gsym->final_value_is_known(); | |
6926 | const tls::Tls_optimization tls_type = target->optimize_tls_ie(final); | |
6927 | if (tls_type == tls::TLSOPT_NONE) | |
6928 | { | |
6929 | if (gsym != NULL) | |
6930 | { | |
6931 | gold_assert(gsym->has_got_offset(GOT_TYPE_TPREL)); | |
6932 | value = gsym->got_offset(GOT_TYPE_TPREL); | |
6933 | } | |
6934 | else | |
6935 | { | |
6936 | unsigned int r_sym = elfcpp::elf_r_sym<size>(rela.get_r_info()); | |
6937 | gold_assert(object->local_has_got_offset(r_sym, GOT_TYPE_TPREL)); | |
6938 | value = object->local_got_offset(r_sym, GOT_TYPE_TPREL); | |
6939 | } | |
6940 | value -= target->got_section()->got_base_offset(object); | |
6941 | } | |
6942 | else | |
6943 | { | |
6944 | gold_assert(tls_type == tls::TLSOPT_TO_LE); | |
6945 | if (r_type == elfcpp::R_POWERPC_GOT_TPREL16 | |
6946 | || r_type == elfcpp::R_POWERPC_GOT_TPREL16_LO) | |
6947 | { | |
6948 | Insn* iview = reinterpret_cast<Insn*>(view - 2 * big_endian); | |
6949 | Insn insn = elfcpp::Swap<32, big_endian>::readval(iview); | |
6950 | insn &= (1 << 26) - (1 << 21); // extract rt from ld | |
6951 | if (size == 32) | |
6952 | insn |= addis_0_2; | |
6953 | else | |
6954 | insn |= addis_0_13; | |
6955 | elfcpp::Swap<32, big_endian>::writeval(iview, insn); | |
6956 | r_type = elfcpp::R_POWERPC_TPREL16_HA; | |
6957 | value = psymval->value(object, rela.get_r_addend()); | |
6958 | } | |
6959 | else | |
6960 | { | |
6961 | Insn* iview = reinterpret_cast<Insn*>(view - 2 * big_endian); | |
6962 | Insn insn = nop; | |
6963 | elfcpp::Swap<32, big_endian>::writeval(iview, insn); | |
6964 | r_type = elfcpp::R_POWERPC_NONE; | |
6965 | } | |
6966 | } | |
6967 | } | |
6968 | else if ((size == 64 && r_type == elfcpp::R_PPC64_TLSGD) | |
6969 | || (size == 32 && r_type == elfcpp::R_PPC_TLSGD)) | |
6970 | { | |
6971 | // Second instruction of a global dynamic sequence, | |
6972 | // the __tls_get_addr call | |
e3deeb9c | 6973 | this->expect_tls_get_addr_call(relinfo, relnum, rela.get_r_offset()); |
dd93cd0a AM |
6974 | const bool final = gsym == NULL || gsym->final_value_is_known(); |
6975 | const tls::Tls_optimization tls_type = target->optimize_tls_gd(final); | |
6976 | if (tls_type != tls::TLSOPT_NONE) | |
6977 | { | |
6978 | if (tls_type == tls::TLSOPT_TO_IE) | |
6979 | { | |
6980 | Insn* iview = reinterpret_cast<Insn*>(view); | |
6981 | Insn insn = add_3_3_13; | |
6982 | if (size == 32) | |
6983 | insn = add_3_3_2; | |
6984 | elfcpp::Swap<32, big_endian>::writeval(iview, insn); | |
6985 | r_type = elfcpp::R_POWERPC_NONE; | |
6986 | } | |
6987 | else | |
6988 | { | |
6989 | Insn* iview = reinterpret_cast<Insn*>(view); | |
6990 | Insn insn = addi_3_3; | |
6991 | elfcpp::Swap<32, big_endian>::writeval(iview, insn); | |
6992 | r_type = elfcpp::R_POWERPC_TPREL16_LO; | |
6993 | view += 2 * big_endian; | |
6994 | value = psymval->value(object, rela.get_r_addend()); | |
6995 | } | |
e3deeb9c | 6996 | this->skip_next_tls_get_addr_call(); |
dd93cd0a AM |
6997 | } |
6998 | } | |
6999 | else if ((size == 64 && r_type == elfcpp::R_PPC64_TLSLD) | |
7000 | || (size == 32 && r_type == elfcpp::R_PPC_TLSLD)) | |
7001 | { | |
7002 | // Second instruction of a local dynamic sequence, | |
7003 | // the __tls_get_addr call | |
e3deeb9c | 7004 | this->expect_tls_get_addr_call(relinfo, relnum, rela.get_r_offset()); |
dd93cd0a AM |
7005 | const tls::Tls_optimization tls_type = target->optimize_tls_ld(); |
7006 | if (tls_type == tls::TLSOPT_TO_LE) | |
7007 | { | |
7008 | Insn* iview = reinterpret_cast<Insn*>(view); | |
7009 | Insn insn = addi_3_3; | |
7010 | elfcpp::Swap<32, big_endian>::writeval(iview, insn); | |
e3deeb9c | 7011 | this->skip_next_tls_get_addr_call(); |
dd93cd0a AM |
7012 | r_type = elfcpp::R_POWERPC_TPREL16_LO; |
7013 | view += 2 * big_endian; | |
7404fe1b | 7014 | value = dtp_offset; |
dd93cd0a AM |
7015 | } |
7016 | } | |
7017 | else if (r_type == elfcpp::R_POWERPC_TLS) | |
7018 | { | |
7019 | // Second instruction of an initial exec sequence | |
7020 | const bool final = gsym == NULL || gsym->final_value_is_known(); | |
7021 | const tls::Tls_optimization tls_type = target->optimize_tls_ie(final); | |
7022 | if (tls_type == tls::TLSOPT_TO_LE) | |
7023 | { | |
7024 | Insn* iview = reinterpret_cast<Insn*>(view); | |
7025 | Insn insn = elfcpp::Swap<32, big_endian>::readval(iview); | |
7026 | unsigned int reg = size == 32 ? 2 : 13; | |
7027 | insn = at_tls_transform(insn, reg); | |
7028 | gold_assert(insn != 0); | |
7029 | elfcpp::Swap<32, big_endian>::writeval(iview, insn); | |
7030 | r_type = elfcpp::R_POWERPC_TPREL16_LO; | |
7031 | view += 2 * big_endian; | |
7032 | value = psymval->value(object, rela.get_r_addend()); | |
7033 | } | |
7034 | } | |
c9824451 | 7035 | else if (!has_plt_value) |
cf43a2fe | 7036 | { |
dd93cd0a | 7037 | Address addend = 0; |
3ea0a085 | 7038 | unsigned int dest_shndx; |
cf43a2fe AM |
7039 | if (r_type != elfcpp::R_PPC_PLTREL24) |
7040 | addend = rela.get_r_addend(); | |
c9824451 | 7041 | value = psymval->value(object, addend); |
dd93cd0a | 7042 | if (size == 64 && is_branch_reloc(r_type)) |
9055360d AM |
7043 | { |
7044 | if (target->abiversion() >= 2) | |
7045 | { | |
7046 | if (gsym != NULL) | |
7047 | value += object->ppc64_local_entry_offset(gsym); | |
7048 | else | |
7049 | value += object->ppc64_local_entry_offset(r_sym); | |
7050 | } | |
7051 | else | |
7052 | value = target->symval_for_branch(relinfo->symtab, value, | |
7053 | gsym, object, &dest_shndx); | |
7054 | } | |
ec661b9d AM |
7055 | unsigned int max_branch_offset = 0; |
7056 | if (r_type == elfcpp::R_POWERPC_REL24 | |
7057 | || r_type == elfcpp::R_PPC_PLTREL24 | |
7058 | || r_type == elfcpp::R_PPC_LOCAL24PC) | |
7059 | max_branch_offset = 1 << 25; | |
7060 | else if (r_type == elfcpp::R_POWERPC_REL14 | |
7061 | || r_type == elfcpp::R_POWERPC_REL14_BRTAKEN | |
7062 | || r_type == elfcpp::R_POWERPC_REL14_BRNTAKEN) | |
7063 | max_branch_offset = 1 << 15; | |
7064 | if (max_branch_offset != 0 | |
7065 | && value - address + max_branch_offset >= 2 * max_branch_offset) | |
7066 | { | |
7067 | Stub_table<size, big_endian>* stub_table | |
7068 | = object->stub_table(relinfo->data_shndx); | |
0cfdc767 AM |
7069 | if (stub_table != NULL) |
7070 | { | |
7071 | Address off = stub_table->find_long_branch_entry(object, value); | |
7072 | if (off != invalid_address) | |
7073 | value = (stub_table->stub_address() + stub_table->plt_size() | |
7074 | + off); | |
7075 | } | |
ec661b9d | 7076 | } |
42cacb20 DE |
7077 | } |
7078 | ||
42cacb20 DE |
7079 | switch (r_type) |
7080 | { | |
dd93cd0a AM |
7081 | case elfcpp::R_PPC64_REL64: |
7082 | case elfcpp::R_POWERPC_REL32: | |
7083 | case elfcpp::R_POWERPC_REL24: | |
7084 | case elfcpp::R_PPC_PLTREL24: | |
7085 | case elfcpp::R_PPC_LOCAL24PC: | |
7086 | case elfcpp::R_POWERPC_REL16: | |
7087 | case elfcpp::R_POWERPC_REL16_LO: | |
7088 | case elfcpp::R_POWERPC_REL16_HI: | |
7089 | case elfcpp::R_POWERPC_REL16_HA: | |
7090 | case elfcpp::R_POWERPC_REL14: | |
7091 | case elfcpp::R_POWERPC_REL14_BRTAKEN: | |
7092 | case elfcpp::R_POWERPC_REL14_BRNTAKEN: | |
7093 | value -= address; | |
7094 | break; | |
7095 | ||
42cacb20 DE |
7096 | case elfcpp::R_PPC64_TOC16: |
7097 | case elfcpp::R_PPC64_TOC16_LO: | |
7098 | case elfcpp::R_PPC64_TOC16_HI: | |
7099 | case elfcpp::R_PPC64_TOC16_HA: | |
7100 | case elfcpp::R_PPC64_TOC16_DS: | |
7101 | case elfcpp::R_PPC64_TOC16_LO_DS: | |
cf43a2fe | 7102 | // Subtract the TOC base address. |
c9269dff | 7103 | value -= (target->got_section()->output_section()->address() |
dd93cd0a | 7104 | + object->toc_base_offset()); |
42cacb20 DE |
7105 | break; |
7106 | ||
cf43a2fe AM |
7107 | case elfcpp::R_POWERPC_SECTOFF: |
7108 | case elfcpp::R_POWERPC_SECTOFF_LO: | |
7109 | case elfcpp::R_POWERPC_SECTOFF_HI: | |
7110 | case elfcpp::R_POWERPC_SECTOFF_HA: | |
7111 | case elfcpp::R_PPC64_SECTOFF_DS: | |
7112 | case elfcpp::R_PPC64_SECTOFF_LO_DS: | |
7113 | if (os != NULL) | |
7114 | value -= os->address(); | |
42cacb20 DE |
7115 | break; |
7116 | ||
dd93cd0a AM |
7117 | case elfcpp::R_PPC64_TPREL16_DS: |
7118 | case elfcpp::R_PPC64_TPREL16_LO_DS: | |
f9c6b907 AM |
7119 | case elfcpp::R_PPC64_TPREL16_HIGH: |
7120 | case elfcpp::R_PPC64_TPREL16_HIGHA: | |
dd93cd0a | 7121 | if (size != 64) |
f9c6b907 | 7122 | // R_PPC_TLSGD, R_PPC_TLSLD, R_PPC_EMB_RELST_LO, R_PPC_EMB_RELST_HI |
dd93cd0a AM |
7123 | break; |
7124 | case elfcpp::R_POWERPC_TPREL16: | |
7125 | case elfcpp::R_POWERPC_TPREL16_LO: | |
7126 | case elfcpp::R_POWERPC_TPREL16_HI: | |
7127 | case elfcpp::R_POWERPC_TPREL16_HA: | |
7128 | case elfcpp::R_POWERPC_TPREL: | |
7129 | case elfcpp::R_PPC64_TPREL16_HIGHER: | |
7130 | case elfcpp::R_PPC64_TPREL16_HIGHERA: | |
7131 | case elfcpp::R_PPC64_TPREL16_HIGHEST: | |
7132 | case elfcpp::R_PPC64_TPREL16_HIGHESTA: | |
7133 | // tls symbol values are relative to tls_segment()->vaddr() | |
7134 | value -= tp_offset; | |
7135 | break; | |
7136 | ||
7137 | case elfcpp::R_PPC64_DTPREL16_DS: | |
7138 | case elfcpp::R_PPC64_DTPREL16_LO_DS: | |
7139 | case elfcpp::R_PPC64_DTPREL16_HIGHER: | |
7140 | case elfcpp::R_PPC64_DTPREL16_HIGHERA: | |
7141 | case elfcpp::R_PPC64_DTPREL16_HIGHEST: | |
7142 | case elfcpp::R_PPC64_DTPREL16_HIGHESTA: | |
7143 | if (size != 64) | |
7144 | // R_PPC_EMB_NADDR32, R_PPC_EMB_NADDR16, R_PPC_EMB_NADDR16_LO | |
7145 | // R_PPC_EMB_NADDR16_HI, R_PPC_EMB_NADDR16_HA, R_PPC_EMB_SDAI16 | |
7146 | break; | |
7147 | case elfcpp::R_POWERPC_DTPREL16: | |
7148 | case elfcpp::R_POWERPC_DTPREL16_LO: | |
7149 | case elfcpp::R_POWERPC_DTPREL16_HI: | |
7150 | case elfcpp::R_POWERPC_DTPREL16_HA: | |
7151 | case elfcpp::R_POWERPC_DTPREL: | |
f9c6b907 AM |
7152 | case elfcpp::R_PPC64_DTPREL16_HIGH: |
7153 | case elfcpp::R_PPC64_DTPREL16_HIGHA: | |
dd93cd0a AM |
7154 | // tls symbol values are relative to tls_segment()->vaddr() |
7155 | value -= dtp_offset; | |
7156 | break; | |
7157 | ||
45965137 AM |
7158 | case elfcpp::R_PPC64_ADDR64_LOCAL: |
7159 | if (gsym != NULL) | |
7160 | value += object->ppc64_local_entry_offset(gsym); | |
7161 | else | |
7162 | value += object->ppc64_local_entry_offset(r_sym); | |
7163 | break; | |
7164 | ||
42cacb20 DE |
7165 | default: |
7166 | break; | |
7167 | } | |
7168 | ||
dd93cd0a | 7169 | Insn branch_bit = 0; |
42cacb20 DE |
7170 | switch (r_type) |
7171 | { | |
dd93cd0a AM |
7172 | case elfcpp::R_POWERPC_ADDR14_BRTAKEN: |
7173 | case elfcpp::R_POWERPC_REL14_BRTAKEN: | |
7174 | branch_bit = 1 << 21; | |
7175 | case elfcpp::R_POWERPC_ADDR14_BRNTAKEN: | |
7176 | case elfcpp::R_POWERPC_REL14_BRNTAKEN: | |
7177 | { | |
7178 | Insn* iview = reinterpret_cast<Insn*>(view); | |
7179 | Insn insn = elfcpp::Swap<32, big_endian>::readval(iview); | |
7180 | insn &= ~(1 << 21); | |
7181 | insn |= branch_bit; | |
7182 | if (this->is_isa_v2) | |
7183 | { | |
7184 | // Set 'a' bit. This is 0b00010 in BO field for branch | |
7185 | // on CR(BI) insns (BO == 001at or 011at), and 0b01000 | |
7186 | // for branch on CTR insns (BO == 1a00t or 1a01t). | |
7187 | if ((insn & (0x14 << 21)) == (0x04 << 21)) | |
7188 | insn |= 0x02 << 21; | |
7189 | else if ((insn & (0x14 << 21)) == (0x10 << 21)) | |
7190 | insn |= 0x08 << 21; | |
7191 | else | |
7192 | break; | |
7193 | } | |
7194 | else | |
7195 | { | |
7196 | // Invert 'y' bit if not the default. | |
7197 | if (static_cast<Signed_address>(value) < 0) | |
7198 | insn ^= 1 << 21; | |
7199 | } | |
7200 | elfcpp::Swap<32, big_endian>::writeval(iview, insn); | |
7201 | } | |
7202 | break; | |
7203 | ||
7204 | default: | |
7205 | break; | |
7206 | } | |
7207 | ||
aba6bc71 AM |
7208 | if (size == 64) |
7209 | { | |
7210 | // Multi-instruction sequences that access the TOC can be | |
7211 | // optimized, eg. addis ra,r2,0; addi rb,ra,x; | |
7212 | // to nop; addi rb,r2,x; | |
7213 | switch (r_type) | |
7214 | { | |
7215 | default: | |
7216 | break; | |
7217 | ||
7218 | case elfcpp::R_POWERPC_GOT_TLSLD16_HA: | |
7219 | case elfcpp::R_POWERPC_GOT_TLSGD16_HA: | |
7220 | case elfcpp::R_POWERPC_GOT_TPREL16_HA: | |
7221 | case elfcpp::R_POWERPC_GOT_DTPREL16_HA: | |
7222 | case elfcpp::R_POWERPC_GOT16_HA: | |
7223 | case elfcpp::R_PPC64_TOC16_HA: | |
d8f5a274 | 7224 | if (parameters->options().toc_optimize()) |
aba6bc71 AM |
7225 | { |
7226 | Insn* iview = reinterpret_cast<Insn*>(view - 2 * big_endian); | |
7227 | Insn insn = elfcpp::Swap<32, big_endian>::readval(iview); | |
7228 | if ((insn & ((0x3f << 26) | 0x1f << 16)) | |
7229 | != ((15u << 26) | (2 << 16)) /* addis rt,2,imm */) | |
7230 | gold_error_at_location(relinfo, relnum, rela.get_r_offset(), | |
7231 | _("toc optimization is not supported " | |
7232 | "for %#08x instruction"), insn); | |
7233 | else if (value + 0x8000 < 0x10000) | |
7234 | { | |
7235 | elfcpp::Swap<32, big_endian>::writeval(iview, nop); | |
7236 | return true; | |
7237 | } | |
7238 | } | |
7239 | break; | |
7240 | ||
7241 | case elfcpp::R_POWERPC_GOT_TLSLD16_LO: | |
7242 | case elfcpp::R_POWERPC_GOT_TLSGD16_LO: | |
7243 | case elfcpp::R_POWERPC_GOT_TPREL16_LO: | |
7244 | case elfcpp::R_POWERPC_GOT_DTPREL16_LO: | |
7245 | case elfcpp::R_POWERPC_GOT16_LO: | |
7246 | case elfcpp::R_PPC64_GOT16_LO_DS: | |
7247 | case elfcpp::R_PPC64_TOC16_LO: | |
7248 | case elfcpp::R_PPC64_TOC16_LO_DS: | |
d8f5a274 | 7249 | if (parameters->options().toc_optimize()) |
aba6bc71 AM |
7250 | { |
7251 | Insn* iview = reinterpret_cast<Insn*>(view - 2 * big_endian); | |
7252 | Insn insn = elfcpp::Swap<32, big_endian>::readval(iview); | |
7253 | if (!ok_lo_toc_insn(insn)) | |
7254 | gold_error_at_location(relinfo, relnum, rela.get_r_offset(), | |
7255 | _("toc optimization is not supported " | |
7256 | "for %#08x instruction"), insn); | |
7257 | else if (value + 0x8000 < 0x10000) | |
7258 | { | |
7259 | if ((insn & (0x3f << 26)) == 12u << 26 /* addic */) | |
7260 | { | |
7261 | // Transform addic to addi when we change reg. | |
7262 | insn &= ~((0x3f << 26) | (0x1f << 16)); | |
7263 | insn |= (14u << 26) | (2 << 16); | |
7264 | } | |
7265 | else | |
7266 | { | |
7267 | insn &= ~(0x1f << 16); | |
7268 | insn |= 2 << 16; | |
7269 | } | |
7270 | elfcpp::Swap<32, big_endian>::writeval(iview, insn); | |
7271 | } | |
7272 | } | |
7273 | break; | |
7274 | } | |
7275 | } | |
7276 | ||
f4baf0d4 | 7277 | typename Reloc::Overflow_check overflow = Reloc::CHECK_NONE; |
b80eed39 | 7278 | elfcpp::Shdr<size, big_endian> shdr(relinfo->data_shdr); |
dd93cd0a AM |
7279 | switch (r_type) |
7280 | { | |
7281 | case elfcpp::R_POWERPC_ADDR32: | |
7282 | case elfcpp::R_POWERPC_UADDR32: | |
7283 | if (size == 64) | |
f4baf0d4 | 7284 | overflow = Reloc::CHECK_BITFIELD; |
42cacb20 DE |
7285 | break; |
7286 | ||
7287 | case elfcpp::R_POWERPC_REL32: | |
dd93cd0a | 7288 | if (size == 64) |
f4baf0d4 | 7289 | overflow = Reloc::CHECK_SIGNED; |
dd93cd0a AM |
7290 | break; |
7291 | ||
dd93cd0a | 7292 | case elfcpp::R_POWERPC_UADDR16: |
f4baf0d4 | 7293 | overflow = Reloc::CHECK_BITFIELD; |
42cacb20 DE |
7294 | break; |
7295 | ||
b80eed39 AM |
7296 | case elfcpp::R_POWERPC_ADDR16: |
7297 | // We really should have three separate relocations, | |
7298 | // one for 16-bit data, one for insns with 16-bit signed fields, | |
7299 | // and one for insns with 16-bit unsigned fields. | |
7300 | overflow = Reloc::CHECK_BITFIELD; | |
7301 | if ((shdr.get_sh_flags() & elfcpp::SHF_EXECINSTR) != 0) | |
7302 | overflow = Reloc::CHECK_LOW_INSN; | |
7303 | break; | |
7304 | ||
f9c6b907 AM |
7305 | case elfcpp::R_POWERPC_ADDR16_HI: |
7306 | case elfcpp::R_POWERPC_ADDR16_HA: | |
7307 | case elfcpp::R_POWERPC_GOT16_HI: | |
7308 | case elfcpp::R_POWERPC_GOT16_HA: | |
7309 | case elfcpp::R_POWERPC_PLT16_HI: | |
7310 | case elfcpp::R_POWERPC_PLT16_HA: | |
7311 | case elfcpp::R_POWERPC_SECTOFF_HI: | |
7312 | case elfcpp::R_POWERPC_SECTOFF_HA: | |
7313 | case elfcpp::R_PPC64_TOC16_HI: | |
7314 | case elfcpp::R_PPC64_TOC16_HA: | |
7315 | case elfcpp::R_PPC64_PLTGOT16_HI: | |
7316 | case elfcpp::R_PPC64_PLTGOT16_HA: | |
7317 | case elfcpp::R_POWERPC_TPREL16_HI: | |
7318 | case elfcpp::R_POWERPC_TPREL16_HA: | |
7319 | case elfcpp::R_POWERPC_DTPREL16_HI: | |
7320 | case elfcpp::R_POWERPC_DTPREL16_HA: | |
7321 | case elfcpp::R_POWERPC_GOT_TLSGD16_HI: | |
7322 | case elfcpp::R_POWERPC_GOT_TLSGD16_HA: | |
7323 | case elfcpp::R_POWERPC_GOT_TLSLD16_HI: | |
7324 | case elfcpp::R_POWERPC_GOT_TLSLD16_HA: | |
7325 | case elfcpp::R_POWERPC_GOT_TPREL16_HI: | |
7326 | case elfcpp::R_POWERPC_GOT_TPREL16_HA: | |
7327 | case elfcpp::R_POWERPC_GOT_DTPREL16_HI: | |
7328 | case elfcpp::R_POWERPC_GOT_DTPREL16_HA: | |
7329 | case elfcpp::R_POWERPC_REL16_HI: | |
7330 | case elfcpp::R_POWERPC_REL16_HA: | |
b80eed39 AM |
7331 | if (size != 32) |
7332 | overflow = Reloc::CHECK_HIGH_INSN; | |
7333 | break; | |
7334 | ||
dd93cd0a AM |
7335 | case elfcpp::R_POWERPC_REL16: |
7336 | case elfcpp::R_PPC64_TOC16: | |
7337 | case elfcpp::R_POWERPC_GOT16: | |
7338 | case elfcpp::R_POWERPC_SECTOFF: | |
7339 | case elfcpp::R_POWERPC_TPREL16: | |
7340 | case elfcpp::R_POWERPC_DTPREL16: | |
b80eed39 AM |
7341 | case elfcpp::R_POWERPC_GOT_TLSGD16: |
7342 | case elfcpp::R_POWERPC_GOT_TLSLD16: | |
7343 | case elfcpp::R_POWERPC_GOT_TPREL16: | |
7344 | case elfcpp::R_POWERPC_GOT_DTPREL16: | |
7345 | overflow = Reloc::CHECK_LOW_INSN; | |
7346 | break; | |
7347 | ||
7348 | case elfcpp::R_POWERPC_ADDR24: | |
7349 | case elfcpp::R_POWERPC_ADDR14: | |
7350 | case elfcpp::R_POWERPC_ADDR14_BRTAKEN: | |
7351 | case elfcpp::R_POWERPC_ADDR14_BRNTAKEN: | |
7352 | case elfcpp::R_PPC64_ADDR16_DS: | |
7353 | case elfcpp::R_POWERPC_REL24: | |
7354 | case elfcpp::R_PPC_PLTREL24: | |
7355 | case elfcpp::R_PPC_LOCAL24PC: | |
dd93cd0a AM |
7356 | case elfcpp::R_PPC64_TPREL16_DS: |
7357 | case elfcpp::R_PPC64_DTPREL16_DS: | |
7358 | case elfcpp::R_PPC64_TOC16_DS: | |
7359 | case elfcpp::R_PPC64_GOT16_DS: | |
7360 | case elfcpp::R_PPC64_SECTOFF_DS: | |
7361 | case elfcpp::R_POWERPC_REL14: | |
7362 | case elfcpp::R_POWERPC_REL14_BRTAKEN: | |
7363 | case elfcpp::R_POWERPC_REL14_BRNTAKEN: | |
f4baf0d4 | 7364 | overflow = Reloc::CHECK_SIGNED; |
42cacb20 | 7365 | break; |
dd93cd0a | 7366 | } |
42cacb20 | 7367 | |
b80eed39 AM |
7368 | if (overflow == Reloc::CHECK_LOW_INSN |
7369 | || overflow == Reloc::CHECK_HIGH_INSN) | |
7370 | { | |
7371 | Insn* iview = reinterpret_cast<Insn*>(view - 2 * big_endian); | |
7372 | Insn insn = elfcpp::Swap<32, big_endian>::readval(iview); | |
7373 | ||
7374 | overflow = Reloc::CHECK_SIGNED; | |
7375 | if (overflow == Reloc::CHECK_LOW_INSN | |
7376 | ? ((insn & (0x3f << 26)) == 28u << 26 /* andi */ | |
7377 | || (insn & (0x3f << 26)) == 24u << 26 /* ori */ | |
7378 | || (insn & (0x3f << 26)) == 26u << 26 /* xori */ | |
7379 | || (insn & (0x3f << 26)) == 10u << 26 /* cmpli */) | |
7380 | : ((insn & (0x3f << 26)) == 29u << 26 /* andis */ | |
7381 | || (insn & (0x3f << 26)) == 25u << 26 /* oris */ | |
7382 | || (insn & (0x3f << 26)) == 27u << 26 /* xoris */)) | |
7383 | overflow = Reloc::CHECK_UNSIGNED; | |
7384 | } | |
7385 | ||
3ea0a085 | 7386 | typename Powerpc_relocate_functions<size, big_endian>::Status status |
f4baf0d4 | 7387 | = Powerpc_relocate_functions<size, big_endian>::STATUS_OK; |
dd93cd0a AM |
7388 | switch (r_type) |
7389 | { | |
7390 | case elfcpp::R_POWERPC_NONE: | |
7391 | case elfcpp::R_POWERPC_TLS: | |
7392 | case elfcpp::R_POWERPC_GNU_VTINHERIT: | |
7393 | case elfcpp::R_POWERPC_GNU_VTENTRY: | |
42cacb20 DE |
7394 | break; |
7395 | ||
7396 | case elfcpp::R_PPC64_ADDR64: | |
dd93cd0a | 7397 | case elfcpp::R_PPC64_REL64: |
cf43a2fe | 7398 | case elfcpp::R_PPC64_TOC: |
45965137 | 7399 | case elfcpp::R_PPC64_ADDR64_LOCAL: |
dd93cd0a AM |
7400 | Reloc::addr64(view, value); |
7401 | break; | |
7402 | ||
7403 | case elfcpp::R_POWERPC_TPREL: | |
7404 | case elfcpp::R_POWERPC_DTPREL: | |
7405 | if (size == 64) | |
7406 | Reloc::addr64(view, value); | |
7407 | else | |
3ea0a085 | 7408 | status = Reloc::addr32(view, value, overflow); |
dd93cd0a AM |
7409 | break; |
7410 | ||
7411 | case elfcpp::R_PPC64_UADDR64: | |
7412 | Reloc::addr64_u(view, value); | |
42cacb20 DE |
7413 | break; |
7414 | ||
7415 | case elfcpp::R_POWERPC_ADDR32: | |
3ea0a085 | 7416 | status = Reloc::addr32(view, value, overflow); |
dd93cd0a AM |
7417 | break; |
7418 | ||
acc276d8 | 7419 | case elfcpp::R_POWERPC_REL32: |
dd93cd0a | 7420 | case elfcpp::R_POWERPC_UADDR32: |
3ea0a085 | 7421 | status = Reloc::addr32_u(view, value, overflow); |
dd93cd0a AM |
7422 | break; |
7423 | ||
7424 | case elfcpp::R_POWERPC_ADDR24: | |
7425 | case elfcpp::R_POWERPC_REL24: | |
7426 | case elfcpp::R_PPC_PLTREL24: | |
7427 | case elfcpp::R_PPC_LOCAL24PC: | |
3ea0a085 | 7428 | status = Reloc::addr24(view, value, overflow); |
42cacb20 DE |
7429 | break; |
7430 | ||
dd93cd0a AM |
7431 | case elfcpp::R_POWERPC_GOT_DTPREL16: |
7432 | case elfcpp::R_POWERPC_GOT_DTPREL16_LO: | |
7433 | if (size == 64) | |
7434 | { | |
3ea0a085 | 7435 | status = Reloc::addr16_ds(view, value, overflow); |
dd93cd0a AM |
7436 | break; |
7437 | } | |
cf43a2fe | 7438 | case elfcpp::R_POWERPC_ADDR16: |
dd93cd0a | 7439 | case elfcpp::R_POWERPC_REL16: |
cf43a2fe | 7440 | case elfcpp::R_PPC64_TOC16: |
42cacb20 | 7441 | case elfcpp::R_POWERPC_GOT16: |
cf43a2fe | 7442 | case elfcpp::R_POWERPC_SECTOFF: |
dd93cd0a AM |
7443 | case elfcpp::R_POWERPC_TPREL16: |
7444 | case elfcpp::R_POWERPC_DTPREL16: | |
7445 | case elfcpp::R_POWERPC_GOT_TLSGD16: | |
7446 | case elfcpp::R_POWERPC_GOT_TLSLD16: | |
7447 | case elfcpp::R_POWERPC_GOT_TPREL16: | |
cf43a2fe | 7448 | case elfcpp::R_POWERPC_ADDR16_LO: |
dd93cd0a | 7449 | case elfcpp::R_POWERPC_REL16_LO: |
cf43a2fe | 7450 | case elfcpp::R_PPC64_TOC16_LO: |
42cacb20 | 7451 | case elfcpp::R_POWERPC_GOT16_LO: |
cf43a2fe | 7452 | case elfcpp::R_POWERPC_SECTOFF_LO: |
dd93cd0a AM |
7453 | case elfcpp::R_POWERPC_TPREL16_LO: |
7454 | case elfcpp::R_POWERPC_DTPREL16_LO: | |
7455 | case elfcpp::R_POWERPC_GOT_TLSGD16_LO: | |
7456 | case elfcpp::R_POWERPC_GOT_TLSLD16_LO: | |
7457 | case elfcpp::R_POWERPC_GOT_TPREL16_LO: | |
3ea0a085 | 7458 | status = Reloc::addr16(view, value, overflow); |
dd93cd0a AM |
7459 | break; |
7460 | ||
7461 | case elfcpp::R_POWERPC_UADDR16: | |
3ea0a085 | 7462 | status = Reloc::addr16_u(view, value, overflow); |
42cacb20 DE |
7463 | break; |
7464 | ||
f9c6b907 AM |
7465 | case elfcpp::R_PPC64_ADDR16_HIGH: |
7466 | case elfcpp::R_PPC64_TPREL16_HIGH: | |
7467 | case elfcpp::R_PPC64_DTPREL16_HIGH: | |
7468 | if (size == 32) | |
7469 | // R_PPC_EMB_MRKREF, R_PPC_EMB_RELST_LO, R_PPC_EMB_RELST_HA | |
7470 | goto unsupp; | |
cf43a2fe | 7471 | case elfcpp::R_POWERPC_ADDR16_HI: |
dd93cd0a | 7472 | case elfcpp::R_POWERPC_REL16_HI: |
cf43a2fe | 7473 | case elfcpp::R_PPC64_TOC16_HI: |
42cacb20 | 7474 | case elfcpp::R_POWERPC_GOT16_HI: |
cf43a2fe | 7475 | case elfcpp::R_POWERPC_SECTOFF_HI: |
dd93cd0a AM |
7476 | case elfcpp::R_POWERPC_TPREL16_HI: |
7477 | case elfcpp::R_POWERPC_DTPREL16_HI: | |
7478 | case elfcpp::R_POWERPC_GOT_TLSGD16_HI: | |
7479 | case elfcpp::R_POWERPC_GOT_TLSLD16_HI: | |
7480 | case elfcpp::R_POWERPC_GOT_TPREL16_HI: | |
7481 | case elfcpp::R_POWERPC_GOT_DTPREL16_HI: | |
7482 | Reloc::addr16_hi(view, value); | |
42cacb20 DE |
7483 | break; |
7484 | ||
f9c6b907 AM |
7485 | case elfcpp::R_PPC64_ADDR16_HIGHA: |
7486 | case elfcpp::R_PPC64_TPREL16_HIGHA: | |
7487 | case elfcpp::R_PPC64_DTPREL16_HIGHA: | |
7488 | if (size == 32) | |
7489 | // R_PPC_EMB_RELSEC16, R_PPC_EMB_RELST_HI, R_PPC_EMB_BIT_FLD | |
7490 | goto unsupp; | |
cf43a2fe | 7491 | case elfcpp::R_POWERPC_ADDR16_HA: |
dd93cd0a | 7492 | case elfcpp::R_POWERPC_REL16_HA: |
cf43a2fe | 7493 | case elfcpp::R_PPC64_TOC16_HA: |
42cacb20 | 7494 | case elfcpp::R_POWERPC_GOT16_HA: |
cf43a2fe | 7495 | case elfcpp::R_POWERPC_SECTOFF_HA: |
dd93cd0a AM |
7496 | case elfcpp::R_POWERPC_TPREL16_HA: |
7497 | case elfcpp::R_POWERPC_DTPREL16_HA: | |
7498 | case elfcpp::R_POWERPC_GOT_TLSGD16_HA: | |
7499 | case elfcpp::R_POWERPC_GOT_TLSLD16_HA: | |
7500 | case elfcpp::R_POWERPC_GOT_TPREL16_HA: | |
7501 | case elfcpp::R_POWERPC_GOT_DTPREL16_HA: | |
7502 | Reloc::addr16_ha(view, value); | |
42cacb20 DE |
7503 | break; |
7504 | ||
dd93cd0a AM |
7505 | case elfcpp::R_PPC64_DTPREL16_HIGHER: |
7506 | if (size == 32) | |
7507 | // R_PPC_EMB_NADDR16_LO | |
7508 | goto unsupp; | |
7509 | case elfcpp::R_PPC64_ADDR16_HIGHER: | |
7510 | case elfcpp::R_PPC64_TPREL16_HIGHER: | |
7511 | Reloc::addr16_hi2(view, value); | |
42cacb20 DE |
7512 | break; |
7513 | ||
dd93cd0a AM |
7514 | case elfcpp::R_PPC64_DTPREL16_HIGHERA: |
7515 | if (size == 32) | |
7516 | // R_PPC_EMB_NADDR16_HI | |
7517 | goto unsupp; | |
7518 | case elfcpp::R_PPC64_ADDR16_HIGHERA: | |
7519 | case elfcpp::R_PPC64_TPREL16_HIGHERA: | |
7520 | Reloc::addr16_ha2(view, value); | |
42cacb20 DE |
7521 | break; |
7522 | ||
dd93cd0a AM |
7523 | case elfcpp::R_PPC64_DTPREL16_HIGHEST: |
7524 | if (size == 32) | |
7525 | // R_PPC_EMB_NADDR16_HA | |
7526 | goto unsupp; | |
7527 | case elfcpp::R_PPC64_ADDR16_HIGHEST: | |
7528 | case elfcpp::R_PPC64_TPREL16_HIGHEST: | |
7529 | Reloc::addr16_hi3(view, value); | |
42cacb20 DE |
7530 | break; |
7531 | ||
dd93cd0a AM |
7532 | case elfcpp::R_PPC64_DTPREL16_HIGHESTA: |
7533 | if (size == 32) | |
7534 | // R_PPC_EMB_SDAI16 | |
7535 | goto unsupp; | |
7536 | case elfcpp::R_PPC64_ADDR16_HIGHESTA: | |
7537 | case elfcpp::R_PPC64_TPREL16_HIGHESTA: | |
7538 | Reloc::addr16_ha3(view, value); | |
7539 | break; | |
7540 | ||
7541 | case elfcpp::R_PPC64_DTPREL16_DS: | |
7542 | case elfcpp::R_PPC64_DTPREL16_LO_DS: | |
7543 | if (size == 32) | |
7544 | // R_PPC_EMB_NADDR32, R_PPC_EMB_NADDR16 | |
7545 | goto unsupp; | |
7546 | case elfcpp::R_PPC64_TPREL16_DS: | |
7547 | case elfcpp::R_PPC64_TPREL16_LO_DS: | |
7548 | if (size == 32) | |
7549 | // R_PPC_TLSGD, R_PPC_TLSLD | |
7550 | break; | |
cf43a2fe AM |
7551 | case elfcpp::R_PPC64_ADDR16_DS: |
7552 | case elfcpp::R_PPC64_ADDR16_LO_DS: | |
42cacb20 DE |
7553 | case elfcpp::R_PPC64_TOC16_DS: |
7554 | case elfcpp::R_PPC64_TOC16_LO_DS: | |
cf43a2fe AM |
7555 | case elfcpp::R_PPC64_GOT16_DS: |
7556 | case elfcpp::R_PPC64_GOT16_LO_DS: | |
7557 | case elfcpp::R_PPC64_SECTOFF_DS: | |
7558 | case elfcpp::R_PPC64_SECTOFF_LO_DS: | |
3ea0a085 | 7559 | status = Reloc::addr16_ds(view, value, overflow); |
dd93cd0a AM |
7560 | break; |
7561 | ||
7562 | case elfcpp::R_POWERPC_ADDR14: | |
7563 | case elfcpp::R_POWERPC_ADDR14_BRTAKEN: | |
7564 | case elfcpp::R_POWERPC_ADDR14_BRNTAKEN: | |
7565 | case elfcpp::R_POWERPC_REL14: | |
7566 | case elfcpp::R_POWERPC_REL14_BRTAKEN: | |
7567 | case elfcpp::R_POWERPC_REL14_BRNTAKEN: | |
3ea0a085 | 7568 | status = Reloc::addr14(view, value, overflow); |
42cacb20 DE |
7569 | break; |
7570 | ||
7571 | case elfcpp::R_POWERPC_COPY: | |
7572 | case elfcpp::R_POWERPC_GLOB_DAT: | |
7573 | case elfcpp::R_POWERPC_JMP_SLOT: | |
7574 | case elfcpp::R_POWERPC_RELATIVE: | |
42cacb20 | 7575 | case elfcpp::R_POWERPC_DTPMOD: |
dd93cd0a AM |
7576 | case elfcpp::R_PPC64_JMP_IREL: |
7577 | case elfcpp::R_POWERPC_IRELATIVE: | |
42cacb20 DE |
7578 | gold_error_at_location(relinfo, relnum, rela.get_r_offset(), |
7579 | _("unexpected reloc %u in object file"), | |
7580 | r_type); | |
7581 | break; | |
7582 | ||
dd93cd0a AM |
7583 | case elfcpp::R_PPC_EMB_SDA21: |
7584 | if (size == 32) | |
7585 | goto unsupp; | |
7586 | else | |
7587 | { | |
7588 | // R_PPC64_TOCSAVE. For the time being this can be ignored. | |
7589 | } | |
7590 | break; | |
7591 | ||
7592 | case elfcpp::R_PPC_EMB_SDA2I16: | |
7593 | case elfcpp::R_PPC_EMB_SDA2REL: | |
7594 | if (size == 32) | |
7595 | goto unsupp; | |
7596 | // R_PPC64_TLSGD, R_PPC64_TLSLD | |
6ce78956 AM |
7597 | break; |
7598 | ||
dd93cd0a AM |
7599 | case elfcpp::R_POWERPC_PLT32: |
7600 | case elfcpp::R_POWERPC_PLTREL32: | |
7601 | case elfcpp::R_POWERPC_PLT16_LO: | |
7602 | case elfcpp::R_POWERPC_PLT16_HI: | |
7603 | case elfcpp::R_POWERPC_PLT16_HA: | |
7604 | case elfcpp::R_PPC_SDAREL16: | |
7605 | case elfcpp::R_POWERPC_ADDR30: | |
7606 | case elfcpp::R_PPC64_PLT64: | |
7607 | case elfcpp::R_PPC64_PLTREL64: | |
7608 | case elfcpp::R_PPC64_PLTGOT16: | |
7609 | case elfcpp::R_PPC64_PLTGOT16_LO: | |
7610 | case elfcpp::R_PPC64_PLTGOT16_HI: | |
7611 | case elfcpp::R_PPC64_PLTGOT16_HA: | |
7612 | case elfcpp::R_PPC64_PLT16_LO_DS: | |
7613 | case elfcpp::R_PPC64_PLTGOT16_DS: | |
7614 | case elfcpp::R_PPC64_PLTGOT16_LO_DS: | |
dd93cd0a AM |
7615 | case elfcpp::R_PPC_EMB_RELSDA: |
7616 | case elfcpp::R_PPC_TOC16: | |
42cacb20 | 7617 | default: |
dd93cd0a | 7618 | unsupp: |
42cacb20 DE |
7619 | gold_error_at_location(relinfo, relnum, rela.get_r_offset(), |
7620 | _("unsupported reloc %u"), | |
7621 | r_type); | |
7622 | break; | |
7623 | } | |
f4baf0d4 | 7624 | if (status != Powerpc_relocate_functions<size, big_endian>::STATUS_OK) |
3ea0a085 AM |
7625 | gold_error_at_location(relinfo, relnum, rela.get_r_offset(), |
7626 | _("relocation overflow")); | |
42cacb20 DE |
7627 | |
7628 | return true; | |
7629 | } | |
7630 | ||
42cacb20 DE |
7631 | // Relocate section data. |
7632 | ||
7633 | template<int size, bool big_endian> | |
7634 | void | |
7635 | Target_powerpc<size, big_endian>::relocate_section( | |
d83ce4e3 AM |
7636 | const Relocate_info<size, big_endian>* relinfo, |
7637 | unsigned int sh_type, | |
7638 | const unsigned char* prelocs, | |
7639 | size_t reloc_count, | |
7640 | Output_section* output_section, | |
7641 | bool needs_special_offset_handling, | |
7642 | unsigned char* view, | |
c9269dff | 7643 | Address address, |
d83ce4e3 AM |
7644 | section_size_type view_size, |
7645 | const Reloc_symbol_changes* reloc_symbol_changes) | |
42cacb20 DE |
7646 | { |
7647 | typedef Target_powerpc<size, big_endian> Powerpc; | |
7648 | typedef typename Target_powerpc<size, big_endian>::Relocate Powerpc_relocate; | |
168a4726 AM |
7649 | typedef typename Target_powerpc<size, big_endian>::Relocate_comdat_behavior |
7650 | Powerpc_comdat_behavior; | |
42cacb20 DE |
7651 | |
7652 | gold_assert(sh_type == elfcpp::SHT_RELA); | |
7653 | ||
7654 | gold::relocate_section<size, big_endian, Powerpc, elfcpp::SHT_RELA, | |
168a4726 | 7655 | Powerpc_relocate, Powerpc_comdat_behavior>( |
42cacb20 DE |
7656 | relinfo, |
7657 | this, | |
7658 | prelocs, | |
7659 | reloc_count, | |
7660 | output_section, | |
7661 | needs_special_offset_handling, | |
7662 | view, | |
7663 | address, | |
364c7fa5 ILT |
7664 | view_size, |
7665 | reloc_symbol_changes); | |
42cacb20 DE |
7666 | } |
7667 | ||
cf43a2fe | 7668 | class Powerpc_scan_relocatable_reloc |
42cacb20 | 7669 | { |
cf43a2fe AM |
7670 | public: |
7671 | // Return the strategy to use for a local symbol which is not a | |
7672 | // section symbol, given the relocation type. | |
7673 | inline Relocatable_relocs::Reloc_strategy | |
7674 | local_non_section_strategy(unsigned int r_type, Relobj*, unsigned int r_sym) | |
7675 | { | |
7676 | if (r_type == 0 && r_sym == 0) | |
7677 | return Relocatable_relocs::RELOC_DISCARD; | |
7678 | return Relocatable_relocs::RELOC_COPY; | |
7679 | } | |
7680 | ||
7681 | // Return the strategy to use for a local symbol which is a section | |
7682 | // symbol, given the relocation type. | |
7683 | inline Relocatable_relocs::Reloc_strategy | |
7684 | local_section_strategy(unsigned int, Relobj*) | |
7685 | { | |
7686 | return Relocatable_relocs::RELOC_ADJUST_FOR_SECTION_RELA; | |
7687 | } | |
7688 | ||
7689 | // Return the strategy to use for a global symbol, given the | |
7690 | // relocation type, the object, and the symbol index. | |
7691 | inline Relocatable_relocs::Reloc_strategy | |
7692 | global_strategy(unsigned int r_type, Relobj*, unsigned int) | |
7693 | { | |
7694 | if (r_type == elfcpp::R_PPC_PLTREL24) | |
7695 | return Relocatable_relocs::RELOC_SPECIAL; | |
7696 | return Relocatable_relocs::RELOC_COPY; | |
7697 | } | |
7698 | }; | |
42cacb20 DE |
7699 | |
7700 | // Scan the relocs during a relocatable link. | |
7701 | ||
7702 | template<int size, bool big_endian> | |
7703 | void | |
7704 | Target_powerpc<size, big_endian>::scan_relocatable_relocs( | |
d83ce4e3 AM |
7705 | Symbol_table* symtab, |
7706 | Layout* layout, | |
7707 | Sized_relobj_file<size, big_endian>* object, | |
7708 | unsigned int data_shndx, | |
7709 | unsigned int sh_type, | |
7710 | const unsigned char* prelocs, | |
7711 | size_t reloc_count, | |
7712 | Output_section* output_section, | |
7713 | bool needs_special_offset_handling, | |
7714 | size_t local_symbol_count, | |
7715 | const unsigned char* plocal_symbols, | |
7716 | Relocatable_relocs* rr) | |
42cacb20 DE |
7717 | { |
7718 | gold_assert(sh_type == elfcpp::SHT_RELA); | |
7719 | ||
42cacb20 | 7720 | gold::scan_relocatable_relocs<size, big_endian, elfcpp::SHT_RELA, |
d83ce4e3 | 7721 | Powerpc_scan_relocatable_reloc>( |
42cacb20 DE |
7722 | symtab, |
7723 | layout, | |
7724 | object, | |
7725 | data_shndx, | |
7726 | prelocs, | |
7727 | reloc_count, | |
7728 | output_section, | |
7729 | needs_special_offset_handling, | |
7730 | local_symbol_count, | |
7731 | plocal_symbols, | |
7732 | rr); | |
7733 | } | |
7734 | ||
7404fe1b | 7735 | // Emit relocations for a section. |
dd93cd0a AM |
7736 | // This is a modified version of the function by the same name in |
7737 | // target-reloc.h. Using relocate_special_relocatable for | |
7738 | // R_PPC_PLTREL24 would require duplication of the entire body of the | |
7739 | // loop, so we may as well duplicate the whole thing. | |
42cacb20 DE |
7740 | |
7741 | template<int size, bool big_endian> | |
7742 | void | |
7404fe1b | 7743 | Target_powerpc<size, big_endian>::relocate_relocs( |
42cacb20 DE |
7744 | const Relocate_info<size, big_endian>* relinfo, |
7745 | unsigned int sh_type, | |
7746 | const unsigned char* prelocs, | |
7747 | size_t reloc_count, | |
7748 | Output_section* output_section, | |
62fe925a | 7749 | typename elfcpp::Elf_types<size>::Elf_Off offset_in_output_section, |
42cacb20 | 7750 | const Relocatable_relocs* rr, |
cf43a2fe | 7751 | unsigned char*, |
dd93cd0a | 7752 | Address view_address, |
cf43a2fe | 7753 | section_size_type, |
42cacb20 DE |
7754 | unsigned char* reloc_view, |
7755 | section_size_type reloc_view_size) | |
7756 | { | |
7757 | gold_assert(sh_type == elfcpp::SHT_RELA); | |
7758 | ||
cf43a2fe AM |
7759 | typedef typename Reloc_types<elfcpp::SHT_RELA, size, big_endian>::Reloc |
7760 | Reltype; | |
7761 | typedef typename Reloc_types<elfcpp::SHT_RELA, size, big_endian>::Reloc_write | |
7762 | Reltype_write; | |
7763 | const int reloc_size | |
7764 | = Reloc_types<elfcpp::SHT_RELA, size, big_endian>::reloc_size; | |
cf43a2fe AM |
7765 | |
7766 | Powerpc_relobj<size, big_endian>* const object | |
7767 | = static_cast<Powerpc_relobj<size, big_endian>*>(relinfo->object); | |
7768 | const unsigned int local_count = object->local_symbol_count(); | |
7769 | unsigned int got2_shndx = object->got2_shndx(); | |
c9269dff | 7770 | Address got2_addend = 0; |
cf43a2fe | 7771 | if (got2_shndx != 0) |
c9269dff AM |
7772 | { |
7773 | got2_addend = object->get_output_section_offset(got2_shndx); | |
7774 | gold_assert(got2_addend != invalid_address); | |
7775 | } | |
cf43a2fe AM |
7776 | |
7777 | unsigned char* pwrite = reloc_view; | |
7404fe1b | 7778 | bool zap_next = false; |
cf43a2fe AM |
7779 | for (size_t i = 0; i < reloc_count; ++i, prelocs += reloc_size) |
7780 | { | |
7781 | Relocatable_relocs::Reloc_strategy strategy = rr->strategy(i); | |
7782 | if (strategy == Relocatable_relocs::RELOC_DISCARD) | |
7783 | continue; | |
7784 | ||
7785 | Reltype reloc(prelocs); | |
7786 | Reltype_write reloc_write(pwrite); | |
7787 | ||
7404fe1b | 7788 | Address offset = reloc.get_r_offset(); |
cf43a2fe | 7789 | typename elfcpp::Elf_types<size>::Elf_WXword r_info = reloc.get_r_info(); |
7404fe1b AM |
7790 | unsigned int r_sym = elfcpp::elf_r_sym<size>(r_info); |
7791 | unsigned int r_type = elfcpp::elf_r_type<size>(r_info); | |
7792 | const unsigned int orig_r_sym = r_sym; | |
7793 | typename elfcpp::Elf_types<size>::Elf_Swxword addend | |
7794 | = reloc.get_r_addend(); | |
7795 | const Symbol* gsym = NULL; | |
7796 | ||
7797 | if (zap_next) | |
7798 | { | |
7799 | // We could arrange to discard these and other relocs for | |
7800 | // tls optimised sequences in the strategy methods, but for | |
7801 | // now do as BFD ld does. | |
7802 | r_type = elfcpp::R_POWERPC_NONE; | |
7803 | zap_next = false; | |
7804 | } | |
cf43a2fe AM |
7805 | |
7806 | // Get the new symbol index. | |
cf43a2fe AM |
7807 | if (r_sym < local_count) |
7808 | { | |
7809 | switch (strategy) | |
7810 | { | |
7811 | case Relocatable_relocs::RELOC_COPY: | |
7812 | case Relocatable_relocs::RELOC_SPECIAL: | |
7404fe1b | 7813 | if (r_sym != 0) |
dd93cd0a | 7814 | { |
7404fe1b AM |
7815 | r_sym = object->symtab_index(r_sym); |
7816 | gold_assert(r_sym != -1U); | |
dd93cd0a | 7817 | } |
cf43a2fe AM |
7818 | break; |
7819 | ||
7820 | case Relocatable_relocs::RELOC_ADJUST_FOR_SECTION_RELA: | |
7821 | { | |
7822 | // We are adjusting a section symbol. We need to find | |
7823 | // the symbol table index of the section symbol for | |
7824 | // the output section corresponding to input section | |
7825 | // in which this symbol is defined. | |
7826 | gold_assert(r_sym < local_count); | |
7827 | bool is_ordinary; | |
7828 | unsigned int shndx = | |
7829 | object->local_symbol_input_shndx(r_sym, &is_ordinary); | |
7830 | gold_assert(is_ordinary); | |
7831 | Output_section* os = object->output_section(shndx); | |
7832 | gold_assert(os != NULL); | |
7833 | gold_assert(os->needs_symtab_index()); | |
7404fe1b | 7834 | r_sym = os->symtab_index(); |
cf43a2fe AM |
7835 | } |
7836 | break; | |
7837 | ||
7838 | default: | |
7839 | gold_unreachable(); | |
7840 | } | |
7841 | } | |
7842 | else | |
7843 | { | |
7404fe1b | 7844 | gsym = object->global_symbol(r_sym); |
cf43a2fe AM |
7845 | gold_assert(gsym != NULL); |
7846 | if (gsym->is_forwarder()) | |
7847 | gsym = relinfo->symtab->resolve_forwards(gsym); | |
7848 | ||
7849 | gold_assert(gsym->has_symtab_index()); | |
7404fe1b | 7850 | r_sym = gsym->symtab_index(); |
cf43a2fe AM |
7851 | } |
7852 | ||
7853 | // Get the new offset--the location in the output section where | |
7854 | // this relocation should be applied. | |
cf43a2fe | 7855 | if (static_cast<Address>(offset_in_output_section) != invalid_address) |
7404fe1b | 7856 | offset += offset_in_output_section; |
cf43a2fe AM |
7857 | else |
7858 | { | |
c9269dff AM |
7859 | section_offset_type sot_offset = |
7860 | convert_types<section_offset_type, Address>(offset); | |
cf43a2fe | 7861 | section_offset_type new_sot_offset = |
c9269dff AM |
7862 | output_section->output_offset(object, relinfo->data_shndx, |
7863 | sot_offset); | |
cf43a2fe | 7864 | gold_assert(new_sot_offset != -1); |
7404fe1b | 7865 | offset = new_sot_offset; |
cf43a2fe AM |
7866 | } |
7867 | ||
dd93cd0a AM |
7868 | // In an object file, r_offset is an offset within the section. |
7869 | // In an executable or dynamic object, generated by | |
7870 | // --emit-relocs, r_offset is an absolute address. | |
7404fe1b | 7871 | if (!parameters->options().relocatable()) |
dd93cd0a | 7872 | { |
7404fe1b | 7873 | offset += view_address; |
dd93cd0a | 7874 | if (static_cast<Address>(offset_in_output_section) != invalid_address) |
7404fe1b | 7875 | offset -= offset_in_output_section; |
dd93cd0a AM |
7876 | } |
7877 | ||
cf43a2fe | 7878 | // Handle the reloc addend based on the strategy. |
cf43a2fe AM |
7879 | if (strategy == Relocatable_relocs::RELOC_COPY) |
7880 | ; | |
7881 | else if (strategy == Relocatable_relocs::RELOC_ADJUST_FOR_SECTION_RELA) | |
7882 | { | |
7404fe1b | 7883 | const Symbol_value<size>* psymval = object->local_symbol(orig_r_sym); |
cf43a2fe AM |
7884 | addend = psymval->value(object, addend); |
7885 | } | |
7886 | else if (strategy == Relocatable_relocs::RELOC_SPECIAL) | |
7887 | { | |
7888 | if (addend >= 32768) | |
7889 | addend += got2_addend; | |
7890 | } | |
7891 | else | |
7892 | gold_unreachable(); | |
7893 | ||
7404fe1b AM |
7894 | if (!parameters->options().relocatable()) |
7895 | { | |
7896 | if (r_type == elfcpp::R_POWERPC_GOT_TLSGD16 | |
7897 | || r_type == elfcpp::R_POWERPC_GOT_TLSGD16_LO | |
7898 | || r_type == elfcpp::R_POWERPC_GOT_TLSGD16_HI | |
7899 | || r_type == elfcpp::R_POWERPC_GOT_TLSGD16_HA) | |
7900 | { | |
7901 | // First instruction of a global dynamic sequence, | |
7902 | // arg setup insn. | |
7903 | const bool final = gsym == NULL || gsym->final_value_is_known(); | |
7904 | switch (this->optimize_tls_gd(final)) | |
7905 | { | |
7906 | case tls::TLSOPT_TO_IE: | |
7907 | r_type += (elfcpp::R_POWERPC_GOT_TPREL16 | |
7908 | - elfcpp::R_POWERPC_GOT_TLSGD16); | |
7909 | break; | |
7910 | case tls::TLSOPT_TO_LE: | |
7911 | if (r_type == elfcpp::R_POWERPC_GOT_TLSGD16 | |
7912 | || r_type == elfcpp::R_POWERPC_GOT_TLSGD16_LO) | |
7913 | r_type = elfcpp::R_POWERPC_TPREL16_HA; | |
7914 | else | |
7915 | { | |
7916 | r_type = elfcpp::R_POWERPC_NONE; | |
7917 | offset -= 2 * big_endian; | |
7918 | } | |
7919 | break; | |
7920 | default: | |
7921 | break; | |
7922 | } | |
7923 | } | |
7924 | else if (r_type == elfcpp::R_POWERPC_GOT_TLSLD16 | |
7925 | || r_type == elfcpp::R_POWERPC_GOT_TLSLD16_LO | |
7926 | || r_type == elfcpp::R_POWERPC_GOT_TLSLD16_HI | |
7927 | || r_type == elfcpp::R_POWERPC_GOT_TLSLD16_HA) | |
7928 | { | |
7929 | // First instruction of a local dynamic sequence, | |
7930 | // arg setup insn. | |
7931 | if (this->optimize_tls_ld() == tls::TLSOPT_TO_LE) | |
7932 | { | |
7933 | if (r_type == elfcpp::R_POWERPC_GOT_TLSLD16 | |
7934 | || r_type == elfcpp::R_POWERPC_GOT_TLSLD16_LO) | |
7935 | { | |
7936 | r_type = elfcpp::R_POWERPC_TPREL16_HA; | |
7937 | const Output_section* os = relinfo->layout->tls_segment() | |
7938 | ->first_section(); | |
7939 | gold_assert(os != NULL); | |
7940 | gold_assert(os->needs_symtab_index()); | |
7941 | r_sym = os->symtab_index(); | |
7942 | addend = dtp_offset; | |
7943 | } | |
7944 | else | |
7945 | { | |
7946 | r_type = elfcpp::R_POWERPC_NONE; | |
7947 | offset -= 2 * big_endian; | |
7948 | } | |
7949 | } | |
7950 | } | |
7951 | else if (r_type == elfcpp::R_POWERPC_GOT_TPREL16 | |
7952 | || r_type == elfcpp::R_POWERPC_GOT_TPREL16_LO | |
7953 | || r_type == elfcpp::R_POWERPC_GOT_TPREL16_HI | |
7954 | || r_type == elfcpp::R_POWERPC_GOT_TPREL16_HA) | |
7955 | { | |
7956 | // First instruction of initial exec sequence. | |
7957 | const bool final = gsym == NULL || gsym->final_value_is_known(); | |
7958 | if (this->optimize_tls_ie(final) == tls::TLSOPT_TO_LE) | |
7959 | { | |
7960 | if (r_type == elfcpp::R_POWERPC_GOT_TPREL16 | |
7961 | || r_type == elfcpp::R_POWERPC_GOT_TPREL16_LO) | |
7962 | r_type = elfcpp::R_POWERPC_TPREL16_HA; | |
7963 | else | |
7964 | { | |
7965 | r_type = elfcpp::R_POWERPC_NONE; | |
7966 | offset -= 2 * big_endian; | |
7967 | } | |
7968 | } | |
7969 | } | |
7970 | else if ((size == 64 && r_type == elfcpp::R_PPC64_TLSGD) | |
7971 | || (size == 32 && r_type == elfcpp::R_PPC_TLSGD)) | |
7972 | { | |
7973 | // Second instruction of a global dynamic sequence, | |
7974 | // the __tls_get_addr call | |
7975 | const bool final = gsym == NULL || gsym->final_value_is_known(); | |
7976 | switch (this->optimize_tls_gd(final)) | |
7977 | { | |
7978 | case tls::TLSOPT_TO_IE: | |
7979 | r_type = elfcpp::R_POWERPC_NONE; | |
7980 | zap_next = true; | |
7981 | break; | |
7982 | case tls::TLSOPT_TO_LE: | |
7983 | r_type = elfcpp::R_POWERPC_TPREL16_LO; | |
7984 | offset += 2 * big_endian; | |
7985 | zap_next = true; | |
7986 | break; | |
7987 | default: | |
7988 | break; | |
7989 | } | |
7990 | } | |
7991 | else if ((size == 64 && r_type == elfcpp::R_PPC64_TLSLD) | |
7992 | || (size == 32 && r_type == elfcpp::R_PPC_TLSLD)) | |
7993 | { | |
7994 | // Second instruction of a local dynamic sequence, | |
7995 | // the __tls_get_addr call | |
7996 | if (this->optimize_tls_ld() == tls::TLSOPT_TO_LE) | |
7997 | { | |
7998 | const Output_section* os = relinfo->layout->tls_segment() | |
7999 | ->first_section(); | |
8000 | gold_assert(os != NULL); | |
8001 | gold_assert(os->needs_symtab_index()); | |
8002 | r_sym = os->symtab_index(); | |
8003 | addend = dtp_offset; | |
8004 | r_type = elfcpp::R_POWERPC_TPREL16_LO; | |
8005 | offset += 2 * big_endian; | |
8006 | zap_next = true; | |
8007 | } | |
8008 | } | |
8009 | else if (r_type == elfcpp::R_POWERPC_TLS) | |
8010 | { | |
8011 | // Second instruction of an initial exec sequence | |
8012 | const bool final = gsym == NULL || gsym->final_value_is_known(); | |
8013 | if (this->optimize_tls_ie(final) == tls::TLSOPT_TO_LE) | |
8014 | { | |
8015 | r_type = elfcpp::R_POWERPC_TPREL16_LO; | |
8016 | offset += 2 * big_endian; | |
8017 | } | |
8018 | } | |
8019 | } | |
8020 | ||
8021 | reloc_write.put_r_offset(offset); | |
8022 | reloc_write.put_r_info(elfcpp::elf_r_info<size>(r_sym, r_type)); | |
8023 | reloc_write.put_r_addend(addend); | |
cf43a2fe AM |
8024 | |
8025 | pwrite += reloc_size; | |
8026 | } | |
8027 | ||
8028 | gold_assert(static_cast<section_size_type>(pwrite - reloc_view) | |
8029 | == reloc_view_size); | |
42cacb20 DE |
8030 | } |
8031 | ||
ec661b9d | 8032 | // Return the value to use for a dynamic symbol which requires special |
42cacb20 DE |
8033 | // treatment. This is how we support equality comparisons of function |
8034 | // pointers across shared library boundaries, as described in the | |
8035 | // processor specific ABI supplement. | |
8036 | ||
8037 | template<int size, bool big_endian> | |
8038 | uint64_t | |
8039 | Target_powerpc<size, big_endian>::do_dynsym_value(const Symbol* gsym) const | |
8040 | { | |
cf43a2fe AM |
8041 | if (size == 32) |
8042 | { | |
8043 | gold_assert(gsym->is_from_dynobj() && gsym->has_plt_offset()); | |
ec661b9d AM |
8044 | for (typename Stub_tables::const_iterator p = this->stub_tables_.begin(); |
8045 | p != this->stub_tables_.end(); | |
8046 | ++p) | |
8047 | { | |
8048 | Address off = (*p)->find_plt_call_entry(gsym); | |
8049 | if (off != invalid_address) | |
8050 | return (*p)->stub_address() + off; | |
8051 | } | |
c9824451 | 8052 | } |
9055360d AM |
8053 | else if (this->abiversion() >= 2) |
8054 | { | |
8055 | unsigned int off = this->glink_section()->find_global_entry(gsym); | |
8056 | if (off != (unsigned int)-1) | |
8057 | return this->glink_section()->global_entry_address() + off; | |
8058 | } | |
ec661b9d | 8059 | gold_unreachable(); |
c9824451 AM |
8060 | } |
8061 | ||
8062 | // Return the PLT address to use for a local symbol. | |
8063 | template<int size, bool big_endian> | |
8064 | uint64_t | |
8065 | Target_powerpc<size, big_endian>::do_plt_address_for_local( | |
8066 | const Relobj* object, | |
8067 | unsigned int symndx) const | |
8068 | { | |
8069 | if (size == 32) | |
8070 | { | |
8071 | const Sized_relobj<size, big_endian>* relobj | |
8072 | = static_cast<const Sized_relobj<size, big_endian>*>(object); | |
ec661b9d AM |
8073 | for (typename Stub_tables::const_iterator p = this->stub_tables_.begin(); |
8074 | p != this->stub_tables_.end(); | |
8075 | ++p) | |
8076 | { | |
8077 | Address off = (*p)->find_plt_call_entry(relobj->sized_relobj(), | |
8078 | symndx); | |
8079 | if (off != invalid_address) | |
8080 | return (*p)->stub_address() + off; | |
8081 | } | |
c9824451 | 8082 | } |
ec661b9d | 8083 | gold_unreachable(); |
c9824451 AM |
8084 | } |
8085 | ||
8086 | // Return the PLT address to use for a global symbol. | |
8087 | template<int size, bool big_endian> | |
8088 | uint64_t | |
8089 | Target_powerpc<size, big_endian>::do_plt_address_for_global( | |
8090 | const Symbol* gsym) const | |
8091 | { | |
8092 | if (size == 32) | |
8093 | { | |
ec661b9d AM |
8094 | for (typename Stub_tables::const_iterator p = this->stub_tables_.begin(); |
8095 | p != this->stub_tables_.end(); | |
8096 | ++p) | |
8097 | { | |
8098 | Address off = (*p)->find_plt_call_entry(gsym); | |
8099 | if (off != invalid_address) | |
8100 | return (*p)->stub_address() + off; | |
8101 | } | |
cf43a2fe | 8102 | } |
9055360d AM |
8103 | else if (this->abiversion() >= 2) |
8104 | { | |
8105 | unsigned int off = this->glink_section()->find_global_entry(gsym); | |
8106 | if (off != (unsigned int)-1) | |
8107 | return this->glink_section()->global_entry_address() + off; | |
8108 | } | |
ec661b9d | 8109 | gold_unreachable(); |
42cacb20 DE |
8110 | } |
8111 | ||
bd73a62d AM |
8112 | // Return the offset to use for the GOT_INDX'th got entry which is |
8113 | // for a local tls symbol specified by OBJECT, SYMNDX. | |
8114 | template<int size, bool big_endian> | |
8115 | int64_t | |
8116 | Target_powerpc<size, big_endian>::do_tls_offset_for_local( | |
8117 | const Relobj* object, | |
8118 | unsigned int symndx, | |
8119 | unsigned int got_indx) const | |
8120 | { | |
8121 | const Powerpc_relobj<size, big_endian>* ppc_object | |
8122 | = static_cast<const Powerpc_relobj<size, big_endian>*>(object); | |
8123 | if (ppc_object->local_symbol(symndx)->is_tls_symbol()) | |
8124 | { | |
8125 | for (Got_type got_type = GOT_TYPE_TLSGD; | |
8126 | got_type <= GOT_TYPE_TPREL; | |
8127 | got_type = Got_type(got_type + 1)) | |
8128 | if (ppc_object->local_has_got_offset(symndx, got_type)) | |
8129 | { | |
8130 | unsigned int off = ppc_object->local_got_offset(symndx, got_type); | |
8131 | if (got_type == GOT_TYPE_TLSGD) | |
8132 | off += size / 8; | |
8133 | if (off == got_indx * (size / 8)) | |
8134 | { | |
8135 | if (got_type == GOT_TYPE_TPREL) | |
8136 | return -tp_offset; | |
8137 | else | |
8138 | return -dtp_offset; | |
8139 | } | |
8140 | } | |
8141 | } | |
8142 | gold_unreachable(); | |
8143 | } | |
8144 | ||
8145 | // Return the offset to use for the GOT_INDX'th got entry which is | |
8146 | // for global tls symbol GSYM. | |
8147 | template<int size, bool big_endian> | |
8148 | int64_t | |
8149 | Target_powerpc<size, big_endian>::do_tls_offset_for_global( | |
8150 | Symbol* gsym, | |
8151 | unsigned int got_indx) const | |
8152 | { | |
8153 | if (gsym->type() == elfcpp::STT_TLS) | |
8154 | { | |
8155 | for (Got_type got_type = GOT_TYPE_TLSGD; | |
8156 | got_type <= GOT_TYPE_TPREL; | |
8157 | got_type = Got_type(got_type + 1)) | |
8158 | if (gsym->has_got_offset(got_type)) | |
8159 | { | |
8160 | unsigned int off = gsym->got_offset(got_type); | |
8161 | if (got_type == GOT_TYPE_TLSGD) | |
8162 | off += size / 8; | |
8163 | if (off == got_indx * (size / 8)) | |
8164 | { | |
8165 | if (got_type == GOT_TYPE_TPREL) | |
8166 | return -tp_offset; | |
8167 | else | |
8168 | return -dtp_offset; | |
8169 | } | |
8170 | } | |
8171 | } | |
8172 | gold_unreachable(); | |
8173 | } | |
8174 | ||
42cacb20 DE |
8175 | // The selector for powerpc object files. |
8176 | ||
8177 | template<int size, bool big_endian> | |
8178 | class Target_selector_powerpc : public Target_selector | |
8179 | { | |
8180 | public: | |
8181 | Target_selector_powerpc() | |
edc27beb AM |
8182 | : Target_selector(size == 64 ? elfcpp::EM_PPC64 : elfcpp::EM_PPC, |
8183 | size, big_endian, | |
03ef7571 ILT |
8184 | (size == 64 |
8185 | ? (big_endian ? "elf64-powerpc" : "elf64-powerpcle") | |
8186 | : (big_endian ? "elf32-powerpc" : "elf32-powerpcle")), | |
8187 | (size == 64 | |
8188 | ? (big_endian ? "elf64ppc" : "elf64lppc") | |
8189 | : (big_endian ? "elf32ppc" : "elf32lppc"))) | |
42cacb20 DE |
8190 | { } |
8191 | ||
2e702c99 RM |
8192 | virtual Target* |
8193 | do_instantiate_target() | |
7f055c20 | 8194 | { return new Target_powerpc<size, big_endian>(); } |
42cacb20 DE |
8195 | }; |
8196 | ||
8197 | Target_selector_powerpc<32, true> target_selector_ppc32; | |
8198 | Target_selector_powerpc<32, false> target_selector_ppc32le; | |
8199 | Target_selector_powerpc<64, true> target_selector_ppc64; | |
8200 | Target_selector_powerpc<64, false> target_selector_ppc64le; | |
8201 | ||
decdd3bc AM |
8202 | // Instantiate these constants for -O0 |
8203 | template<int size, bool big_endian> | |
8204 | const int Output_data_glink<size, big_endian>::pltresolve_size; | |
8205 | template<int size, bool big_endian> | |
9055360d AM |
8206 | const typename Output_data_glink<size, big_endian>::Address |
8207 | Output_data_glink<size, big_endian>::invalid_address; | |
8208 | template<int size, bool big_endian> | |
decdd3bc AM |
8209 | const typename Stub_table<size, big_endian>::Address |
8210 | Stub_table<size, big_endian>::invalid_address; | |
8211 | template<int size, bool big_endian> | |
8212 | const typename Target_powerpc<size, big_endian>::Address | |
8213 | Target_powerpc<size, big_endian>::invalid_address; | |
8214 | ||
42cacb20 | 8215 | } // End anonymous namespace. |