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42cacb20 DE |
1 | // powerpc.cc -- powerpc target support for gold. |
2 | ||
2e702c99 | 3 | // Copyright 2008, 2009, 2010, 2011, 2012 Free Software Foundation, Inc. |
42cacb20 DE |
4 | // Written by David S. Miller <davem@davemloft.net> |
5 | // and David Edelsohn <edelsohn@gnu.org> | |
6 | ||
7 | // This file is part of gold. | |
8 | ||
9 | // This program is free software; you can redistribute it and/or modify | |
10 | // it under the terms of the GNU General Public License as published by | |
11 | // the Free Software Foundation; either version 3 of the License, or | |
12 | // (at your option) any later version. | |
13 | ||
14 | // This program is distributed in the hope that it will be useful, | |
15 | // but WITHOUT ANY WARRANTY; without even the implied warranty of | |
16 | // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
17 | // GNU General Public License for more details. | |
18 | ||
19 | // You should have received a copy of the GNU General Public License | |
20 | // along with this program; if not, write to the Free Software | |
21 | // Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston, | |
22 | // MA 02110-1301, USA. | |
23 | ||
24 | #include "gold.h" | |
25 | ||
26 | #include "elfcpp.h" | |
27 | #include "parameters.h" | |
28 | #include "reloc.h" | |
29 | #include "powerpc.h" | |
30 | #include "object.h" | |
31 | #include "symtab.h" | |
32 | #include "layout.h" | |
33 | #include "output.h" | |
34 | #include "copy-relocs.h" | |
35 | #include "target.h" | |
36 | #include "target-reloc.h" | |
37 | #include "target-select.h" | |
38 | #include "tls.h" | |
39 | #include "errors.h" | |
f345227a | 40 | #include "gc.h" |
42cacb20 DE |
41 | |
42 | namespace | |
43 | { | |
44 | ||
45 | using namespace gold; | |
46 | ||
47 | template<int size, bool big_endian> | |
48 | class Output_data_plt_powerpc; | |
49 | ||
cf43a2fe AM |
50 | template<int size, bool big_endian> |
51 | class Output_data_got_powerpc; | |
52 | ||
53 | template<int size, bool big_endian> | |
54 | class Output_data_glink; | |
55 | ||
56 | template<int size, bool big_endian> | |
57 | class Powerpc_relobj : public Sized_relobj_file<size, big_endian> | |
58 | { | |
59 | public: | |
dd93cd0a | 60 | typedef typename elfcpp::Elf_types<size>::Elf_Addr Address; |
c9269dff | 61 | typedef typename elfcpp::Elf_types<size>::Elf_Off Offset; |
e81fea4d AM |
62 | typedef Unordered_set<Section_id, Section_id_hash> Section_refs; |
63 | typedef Unordered_map<Address, Section_refs> Access_from; | |
c9269dff | 64 | |
cf43a2fe AM |
65 | Powerpc_relobj(const std::string& name, Input_file* input_file, off_t offset, |
66 | const typename elfcpp::Ehdr<size, big_endian>& ehdr) | |
67 | : Sized_relobj_file<size, big_endian>(name, input_file, offset, ehdr), | |
bfdfa4cd | 68 | special_(0), opd_valid_(false), opd_ent_(), access_from_map_() |
cf43a2fe AM |
69 | { } |
70 | ||
71 | ~Powerpc_relobj() | |
72 | { } | |
73 | ||
c9269dff | 74 | // The .got2 section shndx. |
cf43a2fe AM |
75 | unsigned int |
76 | got2_shndx() const | |
77 | { | |
78 | if (size == 32) | |
c9269dff | 79 | return this->special_; |
cf43a2fe AM |
80 | else |
81 | return 0; | |
82 | } | |
83 | ||
c9269dff AM |
84 | // The .opd section shndx. |
85 | unsigned int | |
86 | opd_shndx() const | |
87 | { | |
88 | if (size == 32) | |
89 | return 0; | |
90 | else | |
91 | return this->special_; | |
92 | } | |
93 | ||
94 | // Init OPD entry arrays. | |
95 | void | |
96 | init_opd(size_t opd_size) | |
97 | { | |
98 | size_t count = this->opd_ent_ndx(opd_size); | |
bfdfa4cd | 99 | this->opd_ent_.resize(count); |
c9269dff AM |
100 | } |
101 | ||
102 | // Return section and offset of function entry for .opd + R_OFF. | |
e81fea4d AM |
103 | unsigned int |
104 | get_opd_ent(Address r_off, Address* value = NULL) const | |
c9269dff AM |
105 | { |
106 | size_t ndx = this->opd_ent_ndx(r_off); | |
bfdfa4cd AM |
107 | gold_assert(ndx < this->opd_ent_.size()); |
108 | gold_assert(this->opd_ent_[ndx].shndx != 0); | |
e81fea4d | 109 | if (value != NULL) |
bfdfa4cd AM |
110 | *value = this->opd_ent_[ndx].off; |
111 | return this->opd_ent_[ndx].shndx; | |
c9269dff AM |
112 | } |
113 | ||
114 | // Set section and offset of function entry for .opd + R_OFF. | |
115 | void | |
dd93cd0a | 116 | set_opd_ent(Address r_off, unsigned int shndx, Address value) |
c9269dff AM |
117 | { |
118 | size_t ndx = this->opd_ent_ndx(r_off); | |
bfdfa4cd AM |
119 | gold_assert(ndx < this->opd_ent_.size()); |
120 | this->opd_ent_[ndx].shndx = shndx; | |
121 | this->opd_ent_[ndx].off = value; | |
122 | } | |
123 | ||
124 | // Return discard flag for .opd + R_OFF. | |
125 | bool | |
126 | get_opd_discard(Address r_off) const | |
127 | { | |
128 | size_t ndx = this->opd_ent_ndx(r_off); | |
129 | gold_assert(ndx < this->opd_ent_.size()); | |
130 | return this->opd_ent_[ndx].discard; | |
131 | } | |
132 | ||
133 | // Set discard flag for .opd + R_OFF. | |
134 | void | |
135 | set_opd_discard(Address r_off) | |
136 | { | |
137 | size_t ndx = this->opd_ent_ndx(r_off); | |
138 | gold_assert(ndx < this->opd_ent_.size()); | |
139 | this->opd_ent_[ndx].discard = true; | |
c9269dff AM |
140 | } |
141 | ||
e81fea4d AM |
142 | Access_from* |
143 | access_from_map() | |
144 | { return &this->access_from_map_; } | |
145 | ||
146 | // Add a reference from SRC_OBJ, SRC_INDX to this object's .opd | |
147 | // section at DST_OFF. | |
148 | void | |
149 | add_reference(Object* src_obj, | |
150 | unsigned int src_indx, | |
151 | typename elfcpp::Elf_types<size>::Elf_Addr dst_off) | |
152 | { | |
153 | Section_id src_id(src_obj, src_indx); | |
154 | this->access_from_map_[dst_off].insert(src_id); | |
155 | } | |
156 | ||
157 | bool | |
158 | opd_valid() const | |
159 | { return this->opd_valid_; } | |
160 | ||
161 | void | |
162 | set_opd_valid() | |
163 | { this->opd_valid_ = true; } | |
164 | ||
c9269dff AM |
165 | // Examine .rela.opd to build info about function entry points. |
166 | void | |
167 | scan_opd_relocs(size_t reloc_count, | |
168 | const unsigned char* prelocs, | |
169 | const unsigned char* plocal_syms); | |
170 | ||
171 | void | |
172 | do_read_relocs(Read_relocs_data*); | |
173 | ||
cf43a2fe AM |
174 | bool |
175 | do_find_special_sections(Read_symbols_data* sd); | |
176 | ||
ec4dbad3 AM |
177 | // Adjust this local symbol value. Return false if the symbol |
178 | // should be discarded from the output file. | |
179 | bool | |
180 | do_adjust_local_symbol(Symbol_value<size>* lv) const | |
181 | { | |
182 | if (size == 64 && this->opd_shndx() != 0) | |
183 | { | |
184 | bool is_ordinary; | |
185 | if (lv->input_shndx(&is_ordinary) != this->opd_shndx()) | |
186 | return true; | |
187 | if (this->get_opd_discard(lv->input_value())) | |
188 | return false; | |
189 | } | |
190 | return true; | |
191 | } | |
192 | ||
dd93cd0a AM |
193 | // Return offset in output GOT section that this object will use |
194 | // as a TOC pointer. Won't be just a constant with multi-toc support. | |
195 | Address | |
196 | toc_base_offset() const | |
197 | { return 0x8000; } | |
198 | ||
cf43a2fe | 199 | private: |
bfdfa4cd AM |
200 | struct Opd_ent |
201 | { | |
202 | unsigned int shndx; | |
203 | bool discard; | |
204 | Offset off; | |
205 | }; | |
206 | ||
207 | // Return index into opd_ent_ array for .opd entry at OFF. | |
208 | // .opd entries are 24 bytes long, but they can be spaced 16 bytes | |
209 | // apart when the language doesn't use the last 8-byte word, the | |
210 | // environment pointer. Thus dividing the entry section offset by | |
211 | // 16 will give an index into opd_ent_ that works for either layout | |
212 | // of .opd. (It leaves some elements of the vector unused when .opd | |
213 | // entries are spaced 24 bytes apart, but we don't know the spacing | |
214 | // until relocations are processed, and in any case it is possible | |
215 | // for an object to have some entries spaced 16 bytes apart and | |
216 | // others 24 bytes apart.) | |
c9269dff AM |
217 | size_t |
218 | opd_ent_ndx(size_t off) const | |
219 | { return off >> 4;} | |
220 | ||
221 | // For 32-bit the .got2 section shdnx, for 64-bit the .opd section shndx. | |
222 | unsigned int special_; | |
bfdfa4cd AM |
223 | |
224 | // Set at the start of gc_process_relocs, when we know opd_ent_ | |
225 | // vector is valid. The flag could be made atomic and set in | |
226 | // do_read_relocs with memory_order_release and then tested with | |
227 | // memory_order_acquire, potentially resulting in fewer entries in | |
228 | // access_from_map_. | |
229 | bool opd_valid_; | |
230 | ||
c9269dff AM |
231 | // The first 8-byte word of an OPD entry gives the address of the |
232 | // entry point of the function. Relocatable object files have a | |
bfdfa4cd | 233 | // relocation on this word. The following vector records the |
c9269dff | 234 | // section and offset specified by these relocations. |
bfdfa4cd AM |
235 | std::vector<Opd_ent> opd_ent_; |
236 | ||
e81fea4d | 237 | // References made to this object's .opd section when running |
bfdfa4cd AM |
238 | // gc_process_relocs for another object, before the opd_ent_ vector |
239 | // is valid for this object. | |
e81fea4d | 240 | Access_from access_from_map_; |
cf43a2fe AM |
241 | }; |
242 | ||
42cacb20 DE |
243 | template<int size, bool big_endian> |
244 | class Target_powerpc : public Sized_target<size, big_endian> | |
245 | { | |
246 | public: | |
d83ce4e3 AM |
247 | typedef |
248 | Output_data_reloc<elfcpp::SHT_RELA, true, size, big_endian> Reloc_section; | |
c9269dff | 249 | typedef typename elfcpp::Elf_types<size>::Elf_Addr Address; |
dd93cd0a | 250 | typedef typename elfcpp::Elf_types<size>::Elf_Swxword Signed_address; |
c9269dff | 251 | static const Address invalid_address = static_cast<Address>(0) - 1; |
dd93cd0a AM |
252 | // Offset of tp and dtp pointers from start of TLS block. |
253 | static const Address tp_offset = 0x7000; | |
254 | static const Address dtp_offset = 0x8000; | |
42cacb20 DE |
255 | |
256 | Target_powerpc() | |
257 | : Sized_target<size, big_endian>(&powerpc_info), | |
e5d5f5ed | 258 | got_(NULL), plt_(NULL), iplt_(NULL), glink_(NULL), rela_dyn_(NULL), |
42cacb20 | 259 | copy_relocs_(elfcpp::R_POWERPC_COPY), |
dd93cd0a | 260 | dynbss_(NULL), tlsld_got_offset_(-1U) |
42cacb20 DE |
261 | { |
262 | } | |
263 | ||
2e702c99 | 264 | // Process the relocations to determine unreferenced sections for |
6d03d481 ST |
265 | // garbage collection. |
266 | void | |
ad0f2072 | 267 | gc_process_relocs(Symbol_table* symtab, |
2e702c99 RM |
268 | Layout* layout, |
269 | Sized_relobj_file<size, big_endian>* object, | |
270 | unsigned int data_shndx, | |
271 | unsigned int sh_type, | |
272 | const unsigned char* prelocs, | |
273 | size_t reloc_count, | |
274 | Output_section* output_section, | |
275 | bool needs_special_offset_handling, | |
276 | size_t local_symbol_count, | |
277 | const unsigned char* plocal_symbols); | |
6d03d481 | 278 | |
42cacb20 DE |
279 | // Scan the relocations to look for symbol adjustments. |
280 | void | |
ad0f2072 | 281 | scan_relocs(Symbol_table* symtab, |
42cacb20 | 282 | Layout* layout, |
6fa2a40b | 283 | Sized_relobj_file<size, big_endian>* object, |
42cacb20 DE |
284 | unsigned int data_shndx, |
285 | unsigned int sh_type, | |
286 | const unsigned char* prelocs, | |
287 | size_t reloc_count, | |
288 | Output_section* output_section, | |
289 | bool needs_special_offset_handling, | |
290 | size_t local_symbol_count, | |
291 | const unsigned char* plocal_symbols); | |
921b5322 AM |
292 | |
293 | // Map input .toc section to output .got section. | |
294 | const char* | |
295 | do_output_section_name(const Relobj*, const char* name, size_t* plen) const | |
296 | { | |
297 | if (size == 64 && strcmp(name, ".toc") == 0) | |
298 | { | |
299 | *plen = 4; | |
300 | return ".got"; | |
301 | } | |
302 | return NULL; | |
303 | } | |
304 | ||
42cacb20 DE |
305 | // Finalize the sections. |
306 | void | |
f59f41f3 | 307 | do_finalize_sections(Layout*, const Input_objects*, Symbol_table*); |
42cacb20 DE |
308 | |
309 | // Return the value to use for a dynamic which requires special | |
310 | // treatment. | |
311 | uint64_t | |
312 | do_dynsym_value(const Symbol*) const; | |
313 | ||
bd73a62d AM |
314 | // Return the offset to use for the GOT_INDX'th got entry which is |
315 | // for a local tls symbol specified by OBJECT, SYMNDX. | |
316 | int64_t | |
317 | do_tls_offset_for_local(const Relobj* object, | |
318 | unsigned int symndx, | |
319 | unsigned int got_indx) const; | |
320 | ||
321 | // Return the offset to use for the GOT_INDX'th got entry which is | |
322 | // for global tls symbol GSYM. | |
323 | int64_t | |
324 | do_tls_offset_for_global(Symbol* gsym, unsigned int got_indx) const; | |
325 | ||
42cacb20 DE |
326 | // Relocate a section. |
327 | void | |
328 | relocate_section(const Relocate_info<size, big_endian>*, | |
329 | unsigned int sh_type, | |
330 | const unsigned char* prelocs, | |
331 | size_t reloc_count, | |
332 | Output_section* output_section, | |
333 | bool needs_special_offset_handling, | |
334 | unsigned char* view, | |
c9269dff | 335 | Address view_address, |
364c7fa5 ILT |
336 | section_size_type view_size, |
337 | const Reloc_symbol_changes*); | |
42cacb20 DE |
338 | |
339 | // Scan the relocs during a relocatable link. | |
340 | void | |
ad0f2072 | 341 | scan_relocatable_relocs(Symbol_table* symtab, |
42cacb20 | 342 | Layout* layout, |
6fa2a40b | 343 | Sized_relobj_file<size, big_endian>* object, |
42cacb20 DE |
344 | unsigned int data_shndx, |
345 | unsigned int sh_type, | |
346 | const unsigned char* prelocs, | |
347 | size_t reloc_count, | |
348 | Output_section* output_section, | |
349 | bool needs_special_offset_handling, | |
350 | size_t local_symbol_count, | |
351 | const unsigned char* plocal_symbols, | |
352 | Relocatable_relocs*); | |
353 | ||
7404fe1b | 354 | // Emit relocations for a section. |
42cacb20 | 355 | void |
7404fe1b AM |
356 | relocate_relocs(const Relocate_info<size, big_endian>*, |
357 | unsigned int sh_type, | |
358 | const unsigned char* prelocs, | |
359 | size_t reloc_count, | |
360 | Output_section* output_section, | |
361 | off_t offset_in_output_section, | |
362 | const Relocatable_relocs*, | |
363 | unsigned char*, | |
364 | Address view_address, | |
365 | section_size_type, | |
366 | unsigned char* reloc_view, | |
367 | section_size_type reloc_view_size); | |
42cacb20 DE |
368 | |
369 | // Return whether SYM is defined by the ABI. | |
370 | bool | |
9c2d0ef9 | 371 | do_is_defined_by_abi(const Symbol* sym) const |
42cacb20 | 372 | { |
cf43a2fe | 373 | return strcmp(sym->name(), "__tls_get_addr") == 0; |
42cacb20 DE |
374 | } |
375 | ||
376 | // Return the size of the GOT section. | |
377 | section_size_type | |
0e70b911 | 378 | got_size() const |
42cacb20 DE |
379 | { |
380 | gold_assert(this->got_ != NULL); | |
381 | return this->got_->data_size(); | |
382 | } | |
383 | ||
cf43a2fe AM |
384 | // Get the PLT section. |
385 | const Output_data_plt_powerpc<size, big_endian>* | |
386 | plt_section() const | |
387 | { | |
388 | gold_assert(this->plt_ != NULL); | |
389 | return this->plt_; | |
390 | } | |
391 | ||
e5d5f5ed AM |
392 | // Get the IPLT section. |
393 | const Output_data_plt_powerpc<size, big_endian>* | |
394 | iplt_section() const | |
395 | { | |
396 | gold_assert(this->iplt_ != NULL); | |
397 | return this->iplt_; | |
398 | } | |
399 | ||
cf43a2fe AM |
400 | // Get the .glink section. |
401 | const Output_data_glink<size, big_endian>* | |
402 | glink_section() const | |
403 | { | |
404 | gold_assert(this->glink_ != NULL); | |
405 | return this->glink_; | |
406 | } | |
407 | ||
408 | // Get the GOT section. | |
409 | const Output_data_got_powerpc<size, big_endian>* | |
410 | got_section() const | |
411 | { | |
412 | gold_assert(this->got_ != NULL); | |
413 | return this->got_; | |
414 | } | |
415 | ||
cf43a2fe AM |
416 | Object* |
417 | do_make_elf_object(const std::string&, Input_file*, off_t, | |
418 | const elfcpp::Ehdr<size, big_endian>&); | |
419 | ||
0e70b911 CC |
420 | // Return the number of entries in the GOT. |
421 | unsigned int | |
422 | got_entry_count() const | |
423 | { | |
424 | if (this->got_ == NULL) | |
425 | return 0; | |
426 | return this->got_size() / (size / 8); | |
427 | } | |
428 | ||
429 | // Return the number of entries in the PLT. | |
430 | unsigned int | |
431 | plt_entry_count() const; | |
432 | ||
433 | // Return the offset of the first non-reserved PLT entry. | |
434 | unsigned int | |
435 | first_plt_entry_offset() const; | |
436 | ||
437 | // Return the size of each PLT entry. | |
438 | unsigned int | |
439 | plt_entry_size() const; | |
440 | ||
e81fea4d AM |
441 | // Add any special sections for this symbol to the gc work list. |
442 | // For powerpc64, this adds the code section of a function | |
443 | // descriptor. | |
444 | void | |
445 | do_gc_mark_symbol(Symbol_table* symtab, Symbol* sym) const; | |
446 | ||
447 | // Handle target specific gc actions when adding a gc reference from | |
448 | // SRC_OBJ, SRC_SHNDX to a location specified by DST_OBJ, DST_SHNDX | |
449 | // and DST_OFF. For powerpc64, this adds a referenc to the code | |
450 | // section of a function descriptor. | |
451 | void | |
452 | do_gc_add_reference(Symbol_table* symtab, | |
453 | Object* src_obj, | |
454 | unsigned int src_shndx, | |
455 | Object* dst_obj, | |
456 | unsigned int dst_shndx, | |
457 | Address dst_off) const; | |
458 | ||
42cacb20 DE |
459 | private: |
460 | ||
461 | // The class which scans relocations. | |
462 | class Scan | |
463 | { | |
464 | public: | |
bfdfa4cd AM |
465 | typedef typename elfcpp::Elf_types<size>::Elf_Addr Address; |
466 | ||
42cacb20 DE |
467 | Scan() |
468 | : issued_non_pic_error_(false) | |
469 | { } | |
470 | ||
95a2c8d6 RS |
471 | static inline int |
472 | get_reference_flags(unsigned int r_type); | |
473 | ||
42cacb20 | 474 | inline void |
ad0f2072 | 475 | local(Symbol_table* symtab, Layout* layout, Target_powerpc* target, |
6fa2a40b | 476 | Sized_relobj_file<size, big_endian>* object, |
42cacb20 DE |
477 | unsigned int data_shndx, |
478 | Output_section* output_section, | |
479 | const elfcpp::Rela<size, big_endian>& reloc, unsigned int r_type, | |
bfdfa4cd AM |
480 | const elfcpp::Sym<size, big_endian>& lsym, |
481 | bool is_discarded); | |
42cacb20 DE |
482 | |
483 | inline void | |
ad0f2072 | 484 | global(Symbol_table* symtab, Layout* layout, Target_powerpc* target, |
6fa2a40b | 485 | Sized_relobj_file<size, big_endian>* object, |
42cacb20 DE |
486 | unsigned int data_shndx, |
487 | Output_section* output_section, | |
488 | const elfcpp::Rela<size, big_endian>& reloc, unsigned int r_type, | |
489 | Symbol* gsym); | |
490 | ||
21bb3914 ST |
491 | inline bool |
492 | local_reloc_may_be_function_pointer(Symbol_table* , Layout* , | |
493 | Target_powerpc* , | |
2e702c99 | 494 | Sized_relobj_file<size, big_endian>* , |
21bb3914 | 495 | unsigned int , |
2e702c99 RM |
496 | Output_section* , |
497 | const elfcpp::Rela<size, big_endian>& , | |
498 | unsigned int , | |
499 | const elfcpp::Sym<size, big_endian>&) | |
21bb3914 ST |
500 | { return false; } |
501 | ||
502 | inline bool | |
503 | global_reloc_may_be_function_pointer(Symbol_table* , Layout* , | |
504 | Target_powerpc* , | |
2e702c99 RM |
505 | Sized_relobj_file<size, big_endian>* , |
506 | unsigned int , | |
507 | Output_section* , | |
508 | const elfcpp::Rela<size, | |
21bb3914 ST |
509 | big_endian>& , |
510 | unsigned int , Symbol*) | |
511 | { return false; } | |
512 | ||
42cacb20 DE |
513 | private: |
514 | static void | |
6fa2a40b | 515 | unsupported_reloc_local(Sized_relobj_file<size, big_endian>*, |
42cacb20 DE |
516 | unsigned int r_type); |
517 | ||
518 | static void | |
6fa2a40b | 519 | unsupported_reloc_global(Sized_relobj_file<size, big_endian>*, |
42cacb20 DE |
520 | unsigned int r_type, Symbol*); |
521 | ||
522 | static void | |
523 | generate_tls_call(Symbol_table* symtab, Layout* layout, | |
524 | Target_powerpc* target); | |
525 | ||
526 | void | |
527 | check_non_pic(Relobj*, unsigned int r_type); | |
528 | ||
e5d5f5ed AM |
529 | bool |
530 | reloc_needs_plt_for_ifunc(Sized_relobj_file<size, big_endian>* object, | |
531 | unsigned int r_type); | |
532 | ||
42cacb20 DE |
533 | // Whether we have issued an error about a non-PIC compilation. |
534 | bool issued_non_pic_error_; | |
535 | }; | |
536 | ||
3ea0a085 AM |
537 | Address |
538 | symval_for_branch(Address value, const Sized_symbol<size>* gsym, | |
539 | Powerpc_relobj<size, big_endian>* object, | |
540 | unsigned int *dest_shndx); | |
541 | ||
42cacb20 DE |
542 | // The class which implements relocation. |
543 | class Relocate | |
544 | { | |
545 | public: | |
dd93cd0a AM |
546 | // Use 'at' branch hints when true, 'y' when false. |
547 | // FIXME maybe: set this with an option. | |
548 | static const bool is_isa_v2 = true; | |
549 | ||
550 | enum skip_tls | |
551 | { | |
552 | CALL_NOT_EXPECTED = 0, | |
553 | CALL_EXPECTED = 1, | |
554 | CALL_SKIP = 2 | |
555 | }; | |
556 | ||
557 | Relocate() | |
558 | : call_tls_get_addr_(CALL_NOT_EXPECTED) | |
559 | { } | |
560 | ||
561 | ~Relocate() | |
562 | { | |
563 | if (this->call_tls_get_addr_ != CALL_NOT_EXPECTED) | |
564 | { | |
565 | // FIXME: This needs to specify the location somehow. | |
566 | gold_error(_("missing expected __tls_get_addr call")); | |
567 | } | |
568 | } | |
569 | ||
42cacb20 DE |
570 | // Do a relocation. Return false if the caller should not issue |
571 | // any warnings about this relocation. | |
572 | inline bool | |
573 | relocate(const Relocate_info<size, big_endian>*, Target_powerpc*, | |
031cdbed ILT |
574 | Output_section*, size_t relnum, |
575 | const elfcpp::Rela<size, big_endian>&, | |
42cacb20 DE |
576 | unsigned int r_type, const Sized_symbol<size>*, |
577 | const Symbol_value<size>*, | |
578 | unsigned char*, | |
579 | typename elfcpp::Elf_types<size>::Elf_Addr, | |
580 | section_size_type); | |
581 | ||
dd93cd0a AM |
582 | // This is set if we should skip the next reloc, which should be a |
583 | // call to __tls_get_addr. | |
584 | enum skip_tls call_tls_get_addr_; | |
42cacb20 DE |
585 | }; |
586 | ||
587 | // A class which returns the size required for a relocation type, | |
588 | // used while scanning relocs during a relocatable link. | |
589 | class Relocatable_size_for_reloc | |
590 | { | |
591 | public: | |
592 | unsigned int | |
cf43a2fe AM |
593 | get_size_for_reloc(unsigned int, Relobj*) |
594 | { | |
595 | gold_unreachable(); | |
596 | return 0; | |
597 | } | |
42cacb20 DE |
598 | }; |
599 | ||
dd93cd0a AM |
600 | // Optimize the TLS relocation type based on what we know about the |
601 | // symbol. IS_FINAL is true if the final address of this symbol is | |
602 | // known at link time. | |
603 | ||
604 | tls::Tls_optimization | |
605 | optimize_tls_gd(bool is_final) | |
606 | { | |
607 | // If we are generating a shared library, then we can't do anything | |
608 | // in the linker. | |
609 | if (parameters->options().shared()) | |
610 | return tls::TLSOPT_NONE; | |
611 | ||
612 | if (!is_final) | |
613 | return tls::TLSOPT_TO_IE; | |
614 | return tls::TLSOPT_TO_LE; | |
615 | } | |
616 | ||
617 | tls::Tls_optimization | |
618 | optimize_tls_ld() | |
619 | { | |
620 | if (parameters->options().shared()) | |
621 | return tls::TLSOPT_NONE; | |
622 | ||
623 | return tls::TLSOPT_TO_LE; | |
624 | } | |
625 | ||
626 | tls::Tls_optimization | |
627 | optimize_tls_ie(bool is_final) | |
628 | { | |
629 | if (!is_final || parameters->options().shared()) | |
630 | return tls::TLSOPT_NONE; | |
631 | ||
632 | return tls::TLSOPT_TO_LE; | |
633 | } | |
cf43a2fe | 634 | |
42cacb20 | 635 | // Get the GOT section, creating it if necessary. |
cf43a2fe | 636 | Output_data_got_powerpc<size, big_endian>* |
42cacb20 DE |
637 | got_section(Symbol_table*, Layout*); |
638 | ||
cf43a2fe AM |
639 | // Create glink. |
640 | void | |
641 | make_glink_section(Layout*); | |
42cacb20 | 642 | |
cf43a2fe AM |
643 | // Create the PLT section. |
644 | void | |
645 | make_plt_section(Layout*); | |
42cacb20 | 646 | |
e5d5f5ed AM |
647 | void |
648 | make_iplt_section(Layout*, Symbol_table*); | |
649 | ||
42cacb20 DE |
650 | // Create a PLT entry for a global symbol. |
651 | void | |
e5d5f5ed | 652 | make_plt_entry(Layout*, Symbol_table*, Symbol*, |
cf43a2fe | 653 | const elfcpp::Rela<size, big_endian>&, |
e5d5f5ed AM |
654 | const Sized_relobj_file<size, big_endian>* object); |
655 | ||
656 | // Create a PLT entry for a local IFUNC symbol. | |
657 | void | |
658 | make_local_ifunc_plt_entry(Layout*, Symbol_table*, | |
659 | const elfcpp::Rela<size, big_endian>&, | |
660 | Sized_relobj_file<size, big_endian>*); | |
42cacb20 | 661 | |
dd93cd0a AM |
662 | // Create a GOT entry for local dynamic __tls_get_addr. |
663 | unsigned int | |
664 | tlsld_got_offset(Symbol_table* symtab, Layout* layout, | |
665 | Sized_relobj_file<size, big_endian>* object); | |
666 | ||
42cacb20 | 667 | unsigned int |
dd93cd0a AM |
668 | tlsld_got_offset() const |
669 | { | |
670 | return this->tlsld_got_offset_; | |
671 | } | |
42cacb20 | 672 | |
42cacb20 DE |
673 | // Get the dynamic reloc section, creating it if necessary. |
674 | Reloc_section* | |
675 | rela_dyn_section(Layout*); | |
676 | ||
42cacb20 DE |
677 | // Copy a relocation against a global symbol. |
678 | void | |
ef9beddf | 679 | copy_reloc(Symbol_table* symtab, Layout* layout, |
2e702c99 | 680 | Sized_relobj_file<size, big_endian>* object, |
42cacb20 DE |
681 | unsigned int shndx, Output_section* output_section, |
682 | Symbol* sym, const elfcpp::Rela<size, big_endian>& reloc) | |
683 | { | |
684 | this->copy_relocs_.copy_reloc(symtab, layout, | |
685 | symtab->get_sized_symbol<size>(sym), | |
686 | object, shndx, output_section, | |
687 | reloc, this->rela_dyn_section(layout)); | |
688 | } | |
689 | ||
690 | // Information about this specific target which we pass to the | |
691 | // general Target structure. | |
692 | static Target::Target_info powerpc_info; | |
693 | ||
694 | // The types of GOT entries needed for this platform. | |
0e70b911 CC |
695 | // These values are exposed to the ABI in an incremental link. |
696 | // Do not renumber existing values without changing the version | |
697 | // number of the .gnu_incremental_inputs section. | |
42cacb20 DE |
698 | enum Got_type |
699 | { | |
dd93cd0a AM |
700 | GOT_TYPE_STANDARD, |
701 | GOT_TYPE_TLSGD, // double entry for @got@tlsgd | |
702 | GOT_TYPE_DTPREL, // entry for @got@dtprel | |
703 | GOT_TYPE_TPREL // entry for @got@tprel | |
42cacb20 DE |
704 | }; |
705 | ||
cf43a2fe AM |
706 | // The GOT output section. |
707 | Output_data_got_powerpc<size, big_endian>* got_; | |
708 | // The PLT output section. | |
42cacb20 | 709 | Output_data_plt_powerpc<size, big_endian>* plt_; |
e5d5f5ed AM |
710 | // The IPLT output section. |
711 | Output_data_plt_powerpc<size, big_endian>* iplt_; | |
cf43a2fe AM |
712 | // The .glink output section. |
713 | Output_data_glink<size, big_endian>* glink_; | |
714 | // The dynamic reloc output section. | |
42cacb20 DE |
715 | Reloc_section* rela_dyn_; |
716 | // Relocs saved to avoid a COPY reloc. | |
717 | Copy_relocs<elfcpp::SHT_RELA, size, big_endian> copy_relocs_; | |
718 | // Space for variables copied with a COPY reloc. | |
719 | Output_data_space* dynbss_; | |
dd93cd0a AM |
720 | // Offset of the GOT entry for local dynamic __tls_get_addr calls. |
721 | unsigned int tlsld_got_offset_; | |
42cacb20 DE |
722 | }; |
723 | ||
724 | template<> | |
725 | Target::Target_info Target_powerpc<32, true>::powerpc_info = | |
726 | { | |
727 | 32, // size | |
728 | true, // is_big_endian | |
729 | elfcpp::EM_PPC, // machine_code | |
730 | false, // has_make_symbol | |
731 | false, // has_resolve | |
732 | false, // has_code_fill | |
733 | true, // is_default_stack_executable | |
b3ce541e | 734 | false, // can_icf_inline_merge_sections |
42cacb20 DE |
735 | '\0', // wrap_char |
736 | "/usr/lib/ld.so.1", // dynamic_linker | |
737 | 0x10000000, // default_text_segment_address | |
738 | 64 * 1024, // abi_pagesize (overridable by -z max-page-size) | |
8a5e3e08 | 739 | 4 * 1024, // common_pagesize (overridable by -z common-page-size) |
c9269dff AM |
740 | false, // isolate_execinstr |
741 | 0, // rosegment_gap | |
8a5e3e08 ILT |
742 | elfcpp::SHN_UNDEF, // small_common_shndx |
743 | elfcpp::SHN_UNDEF, // large_common_shndx | |
744 | 0, // small_common_section_flags | |
05a352e6 DK |
745 | 0, // large_common_section_flags |
746 | NULL, // attributes_section | |
747 | NULL // attributes_vendor | |
42cacb20 DE |
748 | }; |
749 | ||
750 | template<> | |
751 | Target::Target_info Target_powerpc<32, false>::powerpc_info = | |
752 | { | |
753 | 32, // size | |
754 | false, // is_big_endian | |
755 | elfcpp::EM_PPC, // machine_code | |
756 | false, // has_make_symbol | |
757 | false, // has_resolve | |
758 | false, // has_code_fill | |
759 | true, // is_default_stack_executable | |
b3ce541e | 760 | false, // can_icf_inline_merge_sections |
42cacb20 DE |
761 | '\0', // wrap_char |
762 | "/usr/lib/ld.so.1", // dynamic_linker | |
763 | 0x10000000, // default_text_segment_address | |
764 | 64 * 1024, // abi_pagesize (overridable by -z max-page-size) | |
8a5e3e08 | 765 | 4 * 1024, // common_pagesize (overridable by -z common-page-size) |
c9269dff AM |
766 | false, // isolate_execinstr |
767 | 0, // rosegment_gap | |
8a5e3e08 ILT |
768 | elfcpp::SHN_UNDEF, // small_common_shndx |
769 | elfcpp::SHN_UNDEF, // large_common_shndx | |
770 | 0, // small_common_section_flags | |
05a352e6 DK |
771 | 0, // large_common_section_flags |
772 | NULL, // attributes_section | |
773 | NULL // attributes_vendor | |
42cacb20 DE |
774 | }; |
775 | ||
776 | template<> | |
777 | Target::Target_info Target_powerpc<64, true>::powerpc_info = | |
778 | { | |
779 | 64, // size | |
780 | true, // is_big_endian | |
781 | elfcpp::EM_PPC64, // machine_code | |
782 | false, // has_make_symbol | |
783 | false, // has_resolve | |
784 | false, // has_code_fill | |
785 | true, // is_default_stack_executable | |
b3ce541e | 786 | false, // can_icf_inline_merge_sections |
42cacb20 DE |
787 | '\0', // wrap_char |
788 | "/usr/lib/ld.so.1", // dynamic_linker | |
789 | 0x10000000, // default_text_segment_address | |
790 | 64 * 1024, // abi_pagesize (overridable by -z max-page-size) | |
dd93cd0a | 791 | 4 * 1024, // common_pagesize (overridable by -z common-page-size) |
c9269dff AM |
792 | false, // isolate_execinstr |
793 | 0, // rosegment_gap | |
8a5e3e08 ILT |
794 | elfcpp::SHN_UNDEF, // small_common_shndx |
795 | elfcpp::SHN_UNDEF, // large_common_shndx | |
796 | 0, // small_common_section_flags | |
05a352e6 DK |
797 | 0, // large_common_section_flags |
798 | NULL, // attributes_section | |
799 | NULL // attributes_vendor | |
42cacb20 DE |
800 | }; |
801 | ||
802 | template<> | |
803 | Target::Target_info Target_powerpc<64, false>::powerpc_info = | |
804 | { | |
805 | 64, // size | |
806 | false, // is_big_endian | |
807 | elfcpp::EM_PPC64, // machine_code | |
808 | false, // has_make_symbol | |
809 | false, // has_resolve | |
810 | false, // has_code_fill | |
811 | true, // is_default_stack_executable | |
b3ce541e | 812 | false, // can_icf_inline_merge_sections |
42cacb20 DE |
813 | '\0', // wrap_char |
814 | "/usr/lib/ld.so.1", // dynamic_linker | |
815 | 0x10000000, // default_text_segment_address | |
816 | 64 * 1024, // abi_pagesize (overridable by -z max-page-size) | |
dd93cd0a | 817 | 4 * 1024, // common_pagesize (overridable by -z common-page-size) |
c9269dff AM |
818 | false, // isolate_execinstr |
819 | 0, // rosegment_gap | |
8a5e3e08 ILT |
820 | elfcpp::SHN_UNDEF, // small_common_shndx |
821 | elfcpp::SHN_UNDEF, // large_common_shndx | |
822 | 0, // small_common_section_flags | |
05a352e6 DK |
823 | 0, // large_common_section_flags |
824 | NULL, // attributes_section | |
825 | NULL // attributes_vendor | |
42cacb20 DE |
826 | }; |
827 | ||
dd93cd0a AM |
828 | inline bool |
829 | is_branch_reloc(unsigned int r_type) | |
830 | { | |
831 | return (r_type == elfcpp::R_POWERPC_REL24 | |
832 | || r_type == elfcpp::R_PPC_PLTREL24 | |
833 | || r_type == elfcpp::R_PPC_LOCAL24PC | |
834 | || r_type == elfcpp::R_POWERPC_REL14 | |
835 | || r_type == elfcpp::R_POWERPC_REL14_BRTAKEN | |
836 | || r_type == elfcpp::R_POWERPC_REL14_BRNTAKEN | |
837 | || r_type == elfcpp::R_POWERPC_ADDR24 | |
838 | || r_type == elfcpp::R_POWERPC_ADDR14 | |
839 | || r_type == elfcpp::R_POWERPC_ADDR14_BRTAKEN | |
840 | || r_type == elfcpp::R_POWERPC_ADDR14_BRNTAKEN); | |
841 | } | |
842 | ||
843 | // If INSN is an opcode that may be used with an @tls operand, return | |
844 | // the transformed insn for TLS optimisation, otherwise return 0. If | |
845 | // REG is non-zero only match an insn with RB or RA equal to REG. | |
846 | uint32_t | |
847 | at_tls_transform(uint32_t insn, unsigned int reg) | |
848 | { | |
849 | if ((insn & (0x3f << 26)) != 31 << 26) | |
850 | return 0; | |
851 | ||
852 | unsigned int rtra; | |
853 | if (reg == 0 || ((insn >> 11) & 0x1f) == reg) | |
854 | rtra = insn & ((1 << 26) - (1 << 16)); | |
855 | else if (((insn >> 16) & 0x1f) == reg) | |
856 | rtra = (insn & (0x1f << 21)) | ((insn & (0x1f << 11)) << 5); | |
857 | else | |
858 | return 0; | |
859 | ||
860 | if ((insn & (0x3ff << 1)) == 266 << 1) | |
861 | // add -> addi | |
862 | insn = 14 << 26; | |
863 | else if ((insn & (0x1f << 1)) == 23 << 1 | |
864 | && ((insn & (0x1f << 6)) < 14 << 6 | |
865 | || ((insn & (0x1f << 6)) >= 16 << 6 | |
866 | && (insn & (0x1f << 6)) < 24 << 6))) | |
867 | // load and store indexed -> dform | |
868 | insn = (32 | ((insn >> 6) & 0x1f)) << 26; | |
869 | else if ((insn & (((0x1a << 5) | 0x1f) << 1)) == 21 << 1) | |
870 | // ldx, ldux, stdx, stdux -> ld, ldu, std, stdu | |
871 | insn = ((58 | ((insn >> 6) & 4)) << 26) | ((insn >> 6) & 1); | |
872 | else if ((insn & (((0x1f << 5) | 0x1f) << 1)) == 341 << 1) | |
873 | // lwax -> lwa | |
874 | insn = (58 << 26) | 2; | |
875 | else | |
876 | return 0; | |
877 | insn |= rtra; | |
878 | return insn; | |
879 | } | |
880 | ||
881 | // Modified version of symtab.h class Symbol member | |
882 | // Given a direct absolute or pc-relative static relocation against | |
883 | // the global symbol, this function returns whether a dynamic relocation | |
884 | // is needed. | |
885 | ||
886 | template<int size> | |
887 | bool | |
888 | needs_dynamic_reloc(const Symbol* gsym, int flags) | |
889 | { | |
890 | // No dynamic relocations in a static link! | |
891 | if (parameters->doing_static_link()) | |
892 | return false; | |
893 | ||
894 | // A reference to an undefined symbol from an executable should be | |
895 | // statically resolved to 0, and does not need a dynamic relocation. | |
896 | // This matches gnu ld behavior. | |
897 | if (gsym->is_undefined() && !parameters->options().shared()) | |
898 | return false; | |
899 | ||
900 | // A reference to an absolute symbol does not need a dynamic relocation. | |
901 | if (gsym->is_absolute()) | |
902 | return false; | |
903 | ||
904 | // An absolute reference within a position-independent output file | |
905 | // will need a dynamic relocation. | |
906 | if ((flags & Symbol::ABSOLUTE_REF) | |
907 | && parameters->options().output_is_position_independent()) | |
908 | return true; | |
909 | ||
910 | // A function call that can branch to a local PLT entry does not need | |
911 | // a dynamic relocation. | |
912 | if ((flags & Symbol::FUNCTION_CALL) && gsym->has_plt_offset()) | |
913 | return false; | |
914 | ||
915 | // A reference to any PLT entry in a non-position-independent executable | |
916 | // does not need a dynamic relocation. | |
917 | // Except due to having function descriptors on powerpc64 we don't define | |
918 | // functions to their plt code in an executable, so this doesn't apply. | |
919 | if (size == 32 | |
920 | && !parameters->options().output_is_position_independent() | |
921 | && gsym->has_plt_offset()) | |
922 | return false; | |
923 | ||
924 | // A reference to a symbol defined in a dynamic object or to a | |
925 | // symbol that is preemptible will need a dynamic relocation. | |
926 | if (gsym->is_from_dynobj() | |
927 | || gsym->is_undefined() | |
928 | || gsym->is_preemptible()) | |
929 | return true; | |
930 | ||
931 | // For all other cases, return FALSE. | |
932 | return false; | |
933 | } | |
934 | ||
935 | // Modified version of symtab.h class Symbol member | |
936 | // Whether we should use the PLT offset associated with a symbol for | |
937 | // a relocation. FLAGS is a set of Reference_flags. | |
938 | ||
939 | template<int size> | |
940 | bool | |
941 | use_plt_offset(const Symbol* gsym, int flags) | |
942 | { | |
943 | // If the symbol doesn't have a PLT offset, then naturally we | |
944 | // don't want to use it. | |
945 | if (!gsym->has_plt_offset()) | |
946 | return false; | |
947 | ||
948 | // For a STT_GNU_IFUNC symbol we always have to use the PLT entry. | |
949 | if (gsym->type() == elfcpp::STT_GNU_IFUNC) | |
950 | return true; | |
951 | ||
952 | // If we are going to generate a dynamic relocation, then we will | |
953 | // wind up using that, so no need to use the PLT entry. | |
954 | if (needs_dynamic_reloc<size>(gsym, flags)) | |
955 | return false; | |
956 | ||
957 | // If the symbol is from a dynamic object, we need to use the PLT | |
958 | // entry. | |
959 | if (gsym->is_from_dynobj()) | |
960 | return true; | |
961 | ||
962 | // If we are generating a shared object, and gsym symbol is | |
963 | // undefined or preemptible, we need to use the PLT entry. | |
964 | if (parameters->options().shared() | |
965 | && (gsym->is_undefined() || gsym->is_preemptible())) | |
966 | return true; | |
967 | ||
968 | // If gsym is a call to a weak undefined symbol, we need to use | |
969 | // the PLT entry; the symbol may be defined by a library loaded | |
970 | // at runtime. | |
971 | if ((flags & Symbol::FUNCTION_CALL) && gsym->is_weak_undefined()) | |
972 | return true; | |
973 | ||
974 | // Otherwise we can use the regular definition. | |
975 | return false; | |
976 | } | |
977 | ||
42cacb20 DE |
978 | template<int size, bool big_endian> |
979 | class Powerpc_relocate_functions | |
980 | { | |
dd93cd0a | 981 | public: |
f4baf0d4 | 982 | enum Overflow_check |
dd93cd0a | 983 | { |
f4baf0d4 AM |
984 | CHECK_NONE, |
985 | CHECK_SIGNED, | |
986 | CHECK_BITFIELD | |
dd93cd0a AM |
987 | }; |
988 | ||
f4baf0d4 | 989 | enum Status |
dd93cd0a | 990 | { |
f4baf0d4 AM |
991 | STATUS_OK, |
992 | STATUS_OVERFLOW | |
993 | }; | |
dd93cd0a | 994 | |
42cacb20 | 995 | private: |
c9269dff | 996 | typedef Powerpc_relocate_functions<size, big_endian> This; |
c9269dff AM |
997 | typedef typename elfcpp::Elf_types<size>::Elf_Addr Address; |
998 | ||
dd93cd0a AM |
999 | template<int valsize> |
1000 | static inline bool | |
1001 | has_overflow_signed(Address value) | |
1002 | { | |
1003 | // limit = 1 << (valsize - 1) without shift count exceeding size of type | |
1004 | Address limit = static_cast<Address>(1) << ((valsize - 1) >> 1); | |
1005 | limit <<= ((valsize - 1) >> 1); | |
1006 | limit <<= ((valsize - 1) - 2 * ((valsize - 1) >> 1)); | |
1007 | return value + limit > (limit << 1) - 1; | |
1008 | } | |
1009 | ||
1010 | template<int valsize> | |
1011 | static inline bool | |
1012 | has_overflow_bitfield(Address value) | |
1013 | { | |
1014 | Address limit = static_cast<Address>(1) << ((valsize - 1) >> 1); | |
1015 | limit <<= ((valsize - 1) >> 1); | |
1016 | limit <<= ((valsize - 1) - 2 * ((valsize - 1) >> 1)); | |
1017 | return value > (limit << 1) - 1 && value + limit > (limit << 1) - 1; | |
1018 | } | |
1019 | ||
1020 | template<int valsize> | |
f4baf0d4 AM |
1021 | static inline Status |
1022 | overflowed(Address value, Overflow_check overflow) | |
dd93cd0a | 1023 | { |
f4baf0d4 | 1024 | if (overflow == CHECK_SIGNED) |
dd93cd0a AM |
1025 | { |
1026 | if (has_overflow_signed<valsize>(value)) | |
f4baf0d4 | 1027 | return STATUS_OVERFLOW; |
dd93cd0a | 1028 | } |
f4baf0d4 | 1029 | else if (overflow == CHECK_BITFIELD) |
dd93cd0a AM |
1030 | { |
1031 | if (has_overflow_bitfield<valsize>(value)) | |
f4baf0d4 | 1032 | return STATUS_OVERFLOW; |
dd93cd0a | 1033 | } |
f4baf0d4 | 1034 | return STATUS_OK; |
dd93cd0a AM |
1035 | } |
1036 | ||
cf43a2fe | 1037 | // Do a simple RELA relocation |
42cacb20 | 1038 | template<int valsize> |
f4baf0d4 AM |
1039 | static inline Status |
1040 | rela(unsigned char* view, Address value, Overflow_check overflow) | |
dd93cd0a AM |
1041 | { |
1042 | typedef typename elfcpp::Swap<valsize, big_endian>::Valtype Valtype; | |
1043 | Valtype* wv = reinterpret_cast<Valtype*>(view); | |
1044 | elfcpp::Swap<valsize, big_endian>::writeval(wv, value); | |
1045 | return overflowed<valsize>(value, overflow); | |
1046 | } | |
1047 | ||
1048 | template<int valsize> | |
f4baf0d4 | 1049 | static inline Status |
42cacb20 DE |
1050 | rela(unsigned char* view, |
1051 | unsigned int right_shift, | |
c9269dff AM |
1052 | typename elfcpp::Valtype_base<valsize>::Valtype dst_mask, |
1053 | Address value, | |
f4baf0d4 | 1054 | Overflow_check overflow) |
42cacb20 DE |
1055 | { |
1056 | typedef typename elfcpp::Swap<valsize, big_endian>::Valtype Valtype; | |
1057 | Valtype* wv = reinterpret_cast<Valtype*>(view); | |
1058 | Valtype val = elfcpp::Swap<valsize, big_endian>::readval(wv); | |
dd93cd0a | 1059 | Valtype reloc = value >> right_shift; |
42cacb20 DE |
1060 | val &= ~dst_mask; |
1061 | reloc &= dst_mask; | |
42cacb20 | 1062 | elfcpp::Swap<valsize, big_endian>::writeval(wv, val | reloc); |
dd93cd0a | 1063 | return overflowed<valsize>(value >> right_shift, overflow); |
42cacb20 DE |
1064 | } |
1065 | ||
cf43a2fe | 1066 | // Do a simple RELA relocation, unaligned. |
42cacb20 | 1067 | template<int valsize> |
f4baf0d4 AM |
1068 | static inline Status |
1069 | rela_ua(unsigned char* view, Address value, Overflow_check overflow) | |
dd93cd0a AM |
1070 | { |
1071 | elfcpp::Swap_unaligned<valsize, big_endian>::writeval(view, value); | |
1072 | return overflowed<valsize>(value, overflow); | |
1073 | } | |
1074 | ||
1075 | template<int valsize> | |
f4baf0d4 | 1076 | static inline Status |
cf43a2fe AM |
1077 | rela_ua(unsigned char* view, |
1078 | unsigned int right_shift, | |
c9269dff AM |
1079 | typename elfcpp::Valtype_base<valsize>::Valtype dst_mask, |
1080 | Address value, | |
f4baf0d4 | 1081 | Overflow_check overflow) |
42cacb20 | 1082 | { |
c9269dff AM |
1083 | typedef typename elfcpp::Swap_unaligned<valsize, big_endian>::Valtype |
1084 | Valtype; | |
dd93cd0a AM |
1085 | Valtype val = elfcpp::Swap<valsize, big_endian>::readval(view); |
1086 | Valtype reloc = value >> right_shift; | |
42cacb20 DE |
1087 | val &= ~dst_mask; |
1088 | reloc &= dst_mask; | |
dd93cd0a AM |
1089 | elfcpp::Swap_unaligned<valsize, big_endian>::writeval(view, val | reloc); |
1090 | return overflowed<valsize>(value >> right_shift, overflow); | |
42cacb20 DE |
1091 | } |
1092 | ||
42cacb20 | 1093 | public: |
dd93cd0a | 1094 | // R_PPC64_ADDR64: (Symbol + Addend) |
42cacb20 | 1095 | static inline void |
dd93cd0a | 1096 | addr64(unsigned char* view, Address value) |
f4baf0d4 | 1097 | { This::template rela<64>(view, value, CHECK_NONE); } |
42cacb20 | 1098 | |
dd93cd0a | 1099 | // R_PPC64_UADDR64: (Symbol + Addend) unaligned |
42cacb20 | 1100 | static inline void |
dd93cd0a | 1101 | addr64_u(unsigned char* view, Address value) |
f4baf0d4 | 1102 | { This::template rela_ua<64>(view, value, CHECK_NONE); } |
dd93cd0a AM |
1103 | |
1104 | // R_POWERPC_ADDR32: (Symbol + Addend) | |
f4baf0d4 AM |
1105 | static inline Status |
1106 | addr32(unsigned char* view, Address value, Overflow_check overflow) | |
dd93cd0a AM |
1107 | { return This::template rela<32>(view, value, overflow); } |
1108 | ||
1109 | // R_POWERPC_UADDR32: (Symbol + Addend) unaligned | |
f4baf0d4 AM |
1110 | static inline Status |
1111 | addr32_u(unsigned char* view, Address value, Overflow_check overflow) | |
dd93cd0a AM |
1112 | { return This::template rela_ua<32>(view, value, overflow); } |
1113 | ||
1114 | // R_POWERPC_ADDR24: (Symbol + Addend) & 0x3fffffc | |
f4baf0d4 AM |
1115 | static inline Status |
1116 | addr24(unsigned char* view, Address value, Overflow_check overflow) | |
dd93cd0a | 1117 | { |
f4baf0d4 AM |
1118 | Status stat = This::template rela<32>(view, 0, 0x03fffffc, value, overflow); |
1119 | if (overflow != CHECK_NONE && (value & 3) != 0) | |
1120 | stat = STATUS_OVERFLOW; | |
dd93cd0a AM |
1121 | return stat; |
1122 | } | |
42cacb20 DE |
1123 | |
1124 | // R_POWERPC_ADDR16: (Symbol + Addend) & 0xffff | |
f4baf0d4 AM |
1125 | static inline Status |
1126 | addr16(unsigned char* view, Address value, Overflow_check overflow) | |
dd93cd0a | 1127 | { return This::template rela<16>(view, value, overflow); } |
42cacb20 | 1128 | |
dd93cd0a | 1129 | // R_POWERPC_ADDR16: (Symbol + Addend) & 0xffff, unaligned |
f4baf0d4 AM |
1130 | static inline Status |
1131 | addr16_u(unsigned char* view, Address value, Overflow_check overflow) | |
dd93cd0a | 1132 | { return This::template rela_ua<16>(view, value, overflow); } |
42cacb20 | 1133 | |
dd93cd0a | 1134 | // R_POWERPC_ADDR16_DS: (Symbol + Addend) & 0xfffc |
f4baf0d4 AM |
1135 | static inline Status |
1136 | addr16_ds(unsigned char* view, Address value, Overflow_check overflow) | |
dd93cd0a | 1137 | { |
f4baf0d4 AM |
1138 | Status stat = This::template rela<16>(view, 0, 0xfffc, value, overflow); |
1139 | if (overflow != CHECK_NONE && (value & 3) != 0) | |
1140 | stat = STATUS_OVERFLOW; | |
dd93cd0a AM |
1141 | return stat; |
1142 | } | |
42cacb20 | 1143 | |
42cacb20 DE |
1144 | // R_POWERPC_ADDR16_HI: ((Symbol + Addend) >> 16) & 0xffff |
1145 | static inline void | |
dd93cd0a | 1146 | addr16_hi(unsigned char* view, Address value) |
f4baf0d4 | 1147 | { This::template rela<16>(view, 16, 0xffff, value, CHECK_NONE); } |
42cacb20 | 1148 | |
c9269dff | 1149 | // R_POWERPC_ADDR16_HA: ((Symbol + Addend + 0x8000) >> 16) & 0xffff |
42cacb20 | 1150 | static inline void |
dd93cd0a AM |
1151 | addr16_ha(unsigned char* view, Address value) |
1152 | { This::addr16_hi(view, value + 0x8000); } | |
42cacb20 | 1153 | |
dd93cd0a | 1154 | // R_POWERPC_ADDR16_HIGHER: ((Symbol + Addend) >> 32) & 0xffff |
42cacb20 | 1155 | static inline void |
dd93cd0a | 1156 | addr16_hi2(unsigned char* view, Address value) |
f4baf0d4 | 1157 | { This::template rela<16>(view, 32, 0xffff, value, CHECK_NONE); } |
42cacb20 | 1158 | |
dd93cd0a | 1159 | // R_POWERPC_ADDR16_HIGHERA: ((Symbol + Addend + 0x8000) >> 32) & 0xffff |
42cacb20 | 1160 | static inline void |
dd93cd0a AM |
1161 | addr16_ha2(unsigned char* view, Address value) |
1162 | { This::addr16_hi2(view, value + 0x8000); } | |
42cacb20 | 1163 | |
dd93cd0a | 1164 | // R_POWERPC_ADDR16_HIGHEST: ((Symbol + Addend) >> 48) & 0xffff |
42cacb20 | 1165 | static inline void |
dd93cd0a | 1166 | addr16_hi3(unsigned char* view, Address value) |
f4baf0d4 | 1167 | { This::template rela<16>(view, 48, 0xffff, value, CHECK_NONE); } |
42cacb20 | 1168 | |
dd93cd0a | 1169 | // R_POWERPC_ADDR16_HIGHESTA: ((Symbol + Addend + 0x8000) >> 48) & 0xffff |
42cacb20 | 1170 | static inline void |
dd93cd0a AM |
1171 | addr16_ha3(unsigned char* view, Address value) |
1172 | { This::addr16_hi3(view, value + 0x8000); } | |
1173 | ||
1174 | // R_POWERPC_ADDR14: (Symbol + Addend) & 0xfffc | |
f4baf0d4 AM |
1175 | static inline Status |
1176 | addr14(unsigned char* view, Address value, Overflow_check overflow) | |
dd93cd0a | 1177 | { |
f4baf0d4 AM |
1178 | Status stat = This::template rela<32>(view, 0, 0xfffc, value, overflow); |
1179 | if (overflow != CHECK_NONE && (value & 3) != 0) | |
1180 | stat = STATUS_OVERFLOW; | |
dd93cd0a AM |
1181 | return stat; |
1182 | } | |
cf43a2fe AM |
1183 | }; |
1184 | ||
c9269dff AM |
1185 | // Stash away the index of .got2 or .opd in a relocatable object, if |
1186 | // such a section exists. | |
cf43a2fe AM |
1187 | |
1188 | template<int size, bool big_endian> | |
1189 | bool | |
1190 | Powerpc_relobj<size, big_endian>::do_find_special_sections( | |
1191 | Read_symbols_data* sd) | |
1192 | { | |
c9269dff AM |
1193 | const unsigned char* const pshdrs = sd->section_headers->data(); |
1194 | const unsigned char* namesu = sd->section_names->data(); | |
1195 | const char* names = reinterpret_cast<const char*>(namesu); | |
1196 | section_size_type names_size = sd->section_names_size; | |
1197 | const unsigned char* s; | |
1198 | ||
1199 | s = this->find_shdr(pshdrs, size == 32 ? ".got2" : ".opd", | |
1200 | names, names_size, NULL); | |
1201 | if (s != NULL) | |
1202 | { | |
1203 | unsigned int ndx = (s - pshdrs) / elfcpp::Elf_sizes<size>::shdr_size; | |
1204 | this->special_ = ndx; | |
1205 | } | |
1206 | return Sized_relobj_file<size, big_endian>::do_find_special_sections(sd); | |
1207 | } | |
1208 | ||
1209 | // Examine .rela.opd to build info about function entry points. | |
1210 | ||
1211 | template<int size, bool big_endian> | |
1212 | void | |
1213 | Powerpc_relobj<size, big_endian>::scan_opd_relocs( | |
1214 | size_t reloc_count, | |
1215 | const unsigned char* prelocs, | |
1216 | const unsigned char* plocal_syms) | |
1217 | { | |
1218 | if (size == 64) | |
cf43a2fe | 1219 | { |
c9269dff AM |
1220 | typedef typename Reloc_types<elfcpp::SHT_RELA, size, big_endian>::Reloc |
1221 | Reltype; | |
1222 | const int reloc_size | |
1223 | = Reloc_types<elfcpp::SHT_RELA, size, big_endian>::reloc_size; | |
1224 | const int sym_size = elfcpp::Elf_sizes<size>::sym_size; | |
ec4dbad3 AM |
1225 | Address expected_off = 0; |
1226 | bool regular = true; | |
1227 | unsigned int opd_ent_size = 0; | |
c9269dff AM |
1228 | |
1229 | for (size_t i = 0; i < reloc_count; ++i, prelocs += reloc_size) | |
cf43a2fe | 1230 | { |
c9269dff AM |
1231 | Reltype reloc(prelocs); |
1232 | typename elfcpp::Elf_types<size>::Elf_WXword r_info | |
1233 | = reloc.get_r_info(); | |
1234 | unsigned int r_type = elfcpp::elf_r_type<size>(r_info); | |
1235 | if (r_type == elfcpp::R_PPC64_ADDR64) | |
1236 | { | |
1237 | unsigned int r_sym = elfcpp::elf_r_sym<size>(r_info); | |
1238 | typename elfcpp::Elf_types<size>::Elf_Addr value; | |
1239 | bool is_ordinary; | |
1240 | unsigned int shndx; | |
1241 | if (r_sym < this->local_symbol_count()) | |
1242 | { | |
1243 | typename elfcpp::Sym<size, big_endian> | |
1244 | lsym(plocal_syms + r_sym * sym_size); | |
1245 | shndx = lsym.get_st_shndx(); | |
1246 | shndx = this->adjust_sym_shndx(r_sym, shndx, &is_ordinary); | |
1247 | value = lsym.get_st_value(); | |
1248 | } | |
1249 | else | |
1250 | shndx = this->symbol_section_and_value(r_sym, &value, | |
1251 | &is_ordinary); | |
1252 | this->set_opd_ent(reloc.get_r_offset(), shndx, | |
1253 | value + reloc.get_r_addend()); | |
ec4dbad3 AM |
1254 | if (i == 2) |
1255 | { | |
1256 | expected_off = reloc.get_r_offset(); | |
1257 | opd_ent_size = expected_off; | |
1258 | } | |
1259 | else if (expected_off != reloc.get_r_offset()) | |
1260 | regular = false; | |
1261 | expected_off += opd_ent_size; | |
1262 | } | |
1263 | else if (r_type == elfcpp::R_PPC64_TOC) | |
1264 | { | |
1265 | if (expected_off - opd_ent_size + 8 != reloc.get_r_offset()) | |
1266 | regular = false; | |
1267 | } | |
1268 | else | |
1269 | { | |
1270 | gold_warning(_("%s: unexpected reloc type %u in .opd section"), | |
1271 | this->name().c_str(), r_type); | |
1272 | regular = false; | |
c9269dff AM |
1273 | } |
1274 | } | |
ec4dbad3 AM |
1275 | if (reloc_count <= 2) |
1276 | opd_ent_size = this->section_size(this->opd_shndx()); | |
1277 | if (opd_ent_size != 24 && opd_ent_size != 16) | |
1278 | regular = false; | |
1279 | if (!regular) | |
1280 | { | |
1281 | gold_warning(_("%s: .opd is not a regular array of opd entries"), | |
1282 | this->name().c_str()); | |
1283 | opd_ent_size = 0; | |
1284 | } | |
c9269dff AM |
1285 | } |
1286 | } | |
1287 | ||
1288 | template<int size, bool big_endian> | |
1289 | void | |
1290 | Powerpc_relobj<size, big_endian>::do_read_relocs(Read_relocs_data* rd) | |
1291 | { | |
1292 | Sized_relobj_file<size, big_endian>::do_read_relocs(rd); | |
1293 | if (size == 64) | |
1294 | { | |
1295 | for (Read_relocs_data::Relocs_list::iterator p = rd->relocs.begin(); | |
1296 | p != rd->relocs.end(); | |
1297 | ++p) | |
1298 | { | |
1299 | if (p->data_shndx == this->opd_shndx()) | |
1300 | { | |
ec4dbad3 AM |
1301 | uint64_t opd_size = this->section_size(this->opd_shndx()); |
1302 | gold_assert(opd_size == static_cast<size_t>(opd_size)); | |
1303 | if (opd_size != 0) | |
1304 | { | |
1305 | this->init_opd(opd_size); | |
1306 | this->scan_opd_relocs(p->reloc_count, p->contents->data(), | |
1307 | rd->local_symbols->data()); | |
1308 | } | |
c9269dff AM |
1309 | break; |
1310 | } | |
cf43a2fe AM |
1311 | } |
1312 | } | |
cf43a2fe AM |
1313 | } |
1314 | ||
1315 | // Set up PowerPC target specific relobj. | |
1316 | ||
1317 | template<int size, bool big_endian> | |
1318 | Object* | |
1319 | Target_powerpc<size, big_endian>::do_make_elf_object( | |
1320 | const std::string& name, | |
1321 | Input_file* input_file, | |
1322 | off_t offset, const elfcpp::Ehdr<size, big_endian>& ehdr) | |
1323 | { | |
1324 | int et = ehdr.get_e_type(); | |
957564c9 AS |
1325 | // ET_EXEC files are valid input for --just-symbols/-R, |
1326 | // and we treat them as relocatable objects. | |
1327 | if (et == elfcpp::ET_REL | |
1328 | || (et == elfcpp::ET_EXEC && input_file->just_symbols())) | |
cf43a2fe AM |
1329 | { |
1330 | Powerpc_relobj<size, big_endian>* obj = | |
c9269dff | 1331 | new Powerpc_relobj<size, big_endian>(name, input_file, offset, ehdr); |
cf43a2fe AM |
1332 | obj->setup(); |
1333 | return obj; | |
1334 | } | |
1335 | else if (et == elfcpp::ET_DYN) | |
1336 | { | |
1337 | Sized_dynobj<size, big_endian>* obj = | |
c9269dff | 1338 | new Sized_dynobj<size, big_endian>(name, input_file, offset, ehdr); |
cf43a2fe AM |
1339 | obj->setup(); |
1340 | return obj; | |
1341 | } | |
1342 | else | |
1343 | { | |
c9269dff | 1344 | gold_error(_("%s: unsupported ELF file type %d"), name.c_str(), et); |
cf43a2fe AM |
1345 | return NULL; |
1346 | } | |
1347 | } | |
1348 | ||
1349 | template<int size, bool big_endian> | |
1350 | class Output_data_got_powerpc : public Output_data_got<size, big_endian> | |
1351 | { | |
1352 | public: | |
1353 | typedef typename elfcpp::Elf_types<size>::Elf_Addr Valtype; | |
1354 | typedef Output_data_reloc<elfcpp::SHT_RELA, true, size, big_endian> Rela_dyn; | |
1355 | ||
1356 | Output_data_got_powerpc(Symbol_table* symtab, Layout* layout) | |
1357 | : Output_data_got<size, big_endian>(), | |
1358 | symtab_(symtab), layout_(layout), | |
1359 | header_ent_cnt_(size == 32 ? 3 : 1), | |
1360 | header_index_(size == 32 ? 0x2000 : 0) | |
1361 | {} | |
1362 | ||
1363 | class Got_entry; | |
1364 | ||
1365 | // Create a new GOT entry and return its offset. | |
1366 | unsigned int | |
1367 | add_got_entry(Got_entry got_entry) | |
42cacb20 | 1368 | { |
cf43a2fe AM |
1369 | this->reserve_ent(); |
1370 | return Output_data_got<size, big_endian>::add_got_entry(got_entry); | |
1371 | } | |
42cacb20 | 1372 | |
cf43a2fe AM |
1373 | // Create a pair of new GOT entries and return the offset of the first. |
1374 | unsigned int | |
1375 | add_got_entry_pair(Got_entry got_entry_1, Got_entry got_entry_2) | |
1376 | { | |
1377 | this->reserve_ent(2); | |
1378 | return Output_data_got<size, big_endian>::add_got_entry_pair(got_entry_1, | |
1379 | got_entry_2); | |
1380 | } | |
42cacb20 | 1381 | |
dd93cd0a AM |
1382 | unsigned int |
1383 | add_constant_pair(Valtype c1, Valtype c2) | |
1384 | { | |
1385 | this->reserve_ent(2); | |
1386 | unsigned int got_offset = this->add_constant(c1); | |
1387 | this->add_constant(c2); | |
1388 | return got_offset; | |
1389 | } | |
1390 | ||
1391 | // Offset of _GLOBAL_OFFSET_TABLE_. | |
cf43a2fe AM |
1392 | unsigned int |
1393 | g_o_t() const | |
1394 | { | |
1395 | return this->got_offset(this->header_index_); | |
42cacb20 | 1396 | } |
cf43a2fe | 1397 | |
dd93cd0a AM |
1398 | // Offset of base used to access the GOT/TOC. |
1399 | // The got/toc pointer reg will be set to this value. | |
1400 | typename elfcpp::Elf_types<size>::Elf_Off | |
1401 | got_base_offset(const Powerpc_relobj<size, big_endian>* object) const | |
1402 | { | |
1403 | if (size == 32) | |
1404 | return this->g_o_t(); | |
1405 | else | |
1406 | return (this->output_section()->address() | |
1407 | + object->toc_base_offset() | |
1408 | - this->address()); | |
1409 | } | |
1410 | ||
cf43a2fe AM |
1411 | // Ensure our GOT has a header. |
1412 | void | |
1413 | set_final_data_size() | |
1414 | { | |
1415 | if (this->header_ent_cnt_ != 0) | |
1416 | this->make_header(); | |
1417 | Output_data_got<size, big_endian>::set_final_data_size(); | |
1418 | } | |
1419 | ||
1420 | // First word of GOT header needs some values that are not | |
1421 | // handled by Output_data_got so poke them in here. | |
1422 | // For 32-bit, address of .dynamic, for 64-bit, address of TOCbase. | |
1423 | void | |
1424 | do_write(Output_file* of) | |
1425 | { | |
6ce78956 AM |
1426 | this->replace_constant(this->header_index_, |
1427 | (size == 32 | |
1428 | ? this->layout_->dynamic_section()->address() | |
dd93cd0a | 1429 | : this->output_section()->address() + 0x8000)); |
cf43a2fe AM |
1430 | |
1431 | Output_data_got<size, big_endian>::do_write(of); | |
1432 | } | |
1433 | ||
1434 | private: | |
1435 | void | |
1436 | reserve_ent(unsigned int cnt = 1) | |
1437 | { | |
1438 | if (this->header_ent_cnt_ == 0) | |
1439 | return; | |
1440 | if (this->num_entries() + cnt > this->header_index_) | |
1441 | this->make_header(); | |
1442 | } | |
1443 | ||
1444 | void | |
1445 | make_header() | |
1446 | { | |
1447 | this->header_ent_cnt_ = 0; | |
1448 | this->header_index_ = this->num_entries(); | |
1449 | if (size == 32) | |
1450 | { | |
1451 | Output_data_got<size, big_endian>::add_constant(0); | |
1452 | Output_data_got<size, big_endian>::add_constant(0); | |
1453 | Output_data_got<size, big_endian>::add_constant(0); | |
1454 | ||
1455 | // Define _GLOBAL_OFFSET_TABLE_ at the header | |
1456 | this->symtab_->define_in_output_data("_GLOBAL_OFFSET_TABLE_", NULL, | |
1457 | Symbol_table::PREDEFINED, | |
1458 | this, this->g_o_t(), 0, | |
1459 | elfcpp::STT_OBJECT, | |
1460 | elfcpp::STB_LOCAL, | |
1461 | elfcpp::STV_HIDDEN, | |
1462 | 0, false, false); | |
1463 | } | |
1464 | else | |
1465 | Output_data_got<size, big_endian>::add_constant(0); | |
1466 | } | |
1467 | ||
1468 | // Stashed pointers. | |
1469 | Symbol_table* symtab_; | |
1470 | Layout* layout_; | |
1471 | ||
1472 | // GOT header size. | |
1473 | unsigned int header_ent_cnt_; | |
1474 | // GOT header index. | |
1475 | unsigned int header_index_; | |
42cacb20 DE |
1476 | }; |
1477 | ||
1478 | // Get the GOT section, creating it if necessary. | |
1479 | ||
1480 | template<int size, bool big_endian> | |
cf43a2fe | 1481 | Output_data_got_powerpc<size, big_endian>* |
42cacb20 DE |
1482 | Target_powerpc<size, big_endian>::got_section(Symbol_table* symtab, |
1483 | Layout* layout) | |
1484 | { | |
1485 | if (this->got_ == NULL) | |
1486 | { | |
1487 | gold_assert(symtab != NULL && layout != NULL); | |
1488 | ||
cf43a2fe AM |
1489 | this->got_ |
1490 | = new Output_data_got_powerpc<size, big_endian>(symtab, layout); | |
42cacb20 DE |
1491 | |
1492 | layout->add_output_section_data(".got", elfcpp::SHT_PROGBITS, | |
1493 | elfcpp::SHF_ALLOC | elfcpp::SHF_WRITE, | |
22f0da72 | 1494 | this->got_, ORDER_DATA, false); |
42cacb20 DE |
1495 | } |
1496 | ||
1497 | return this->got_; | |
1498 | } | |
1499 | ||
1500 | // Get the dynamic reloc section, creating it if necessary. | |
1501 | ||
1502 | template<int size, bool big_endian> | |
1503 | typename Target_powerpc<size, big_endian>::Reloc_section* | |
1504 | Target_powerpc<size, big_endian>::rela_dyn_section(Layout* layout) | |
1505 | { | |
1506 | if (this->rela_dyn_ == NULL) | |
1507 | { | |
1508 | gold_assert(layout != NULL); | |
1509 | this->rela_dyn_ = new Reloc_section(parameters->options().combreloc()); | |
1510 | layout->add_output_section_data(".rela.dyn", elfcpp::SHT_RELA, | |
22f0da72 ILT |
1511 | elfcpp::SHF_ALLOC, this->rela_dyn_, |
1512 | ORDER_DYNAMIC_RELOCS, false); | |
42cacb20 DE |
1513 | } |
1514 | return this->rela_dyn_; | |
1515 | } | |
1516 | ||
1517 | // A class to handle the PLT data. | |
1518 | ||
1519 | template<int size, bool big_endian> | |
cf43a2fe | 1520 | class Output_data_plt_powerpc : public Output_section_data_build |
42cacb20 DE |
1521 | { |
1522 | public: | |
1523 | typedef Output_data_reloc<elfcpp::SHT_RELA, true, | |
1524 | size, big_endian> Reloc_section; | |
1525 | ||
e5d5f5ed AM |
1526 | Output_data_plt_powerpc(Target_powerpc<size, big_endian>* targ, |
1527 | Reloc_section* plt_rel, | |
1528 | unsigned int reserved_size, | |
1529 | const char* name) | |
1530 | : Output_section_data_build(size == 32 ? 4 : 8), | |
1531 | rel_(plt_rel), | |
1532 | targ_(targ), | |
1533 | initial_plt_entry_size_(reserved_size), | |
1534 | name_(name) | |
1535 | { } | |
42cacb20 DE |
1536 | |
1537 | // Add an entry to the PLT. | |
cf43a2fe AM |
1538 | void |
1539 | add_entry(Symbol*); | |
42cacb20 | 1540 | |
e5d5f5ed AM |
1541 | void |
1542 | add_ifunc_entry(Symbol*); | |
1543 | ||
1544 | void | |
1545 | add_local_ifunc_entry(Sized_relobj_file<size, big_endian>*, unsigned int); | |
1546 | ||
42cacb20 | 1547 | // Return the .rela.plt section data. |
e5d5f5ed | 1548 | Reloc_section* |
cf43a2fe AM |
1549 | rel_plt() const |
1550 | { | |
42cacb20 DE |
1551 | return this->rel_; |
1552 | } | |
1553 | ||
0e70b911 CC |
1554 | // Return the number of PLT entries. |
1555 | unsigned int | |
1556 | entry_count() const | |
d83ce4e3 | 1557 | { |
e5d5f5ed | 1558 | return ((this->current_data_size() - this->initial_plt_entry_size_) |
d83ce4e3 AM |
1559 | / plt_entry_size); |
1560 | } | |
0e70b911 CC |
1561 | |
1562 | // Return the offset of the first non-reserved PLT entry. | |
e5d5f5ed | 1563 | unsigned int |
0e70b911 | 1564 | first_plt_entry_offset() |
e5d5f5ed | 1565 | { return this->initial_plt_entry_size_; } |
0e70b911 CC |
1566 | |
1567 | // Return the size of a PLT entry. | |
1568 | static unsigned int | |
1569 | get_plt_entry_size() | |
cf43a2fe | 1570 | { return plt_entry_size; } |
0e70b911 | 1571 | |
42cacb20 | 1572 | protected: |
42cacb20 | 1573 | void |
cf43a2fe | 1574 | do_adjust_output_section(Output_section* os) |
42cacb20 | 1575 | { |
cf43a2fe | 1576 | os->set_entsize(0); |
42cacb20 DE |
1577 | } |
1578 | ||
6ce78956 AM |
1579 | // Write to a map file. |
1580 | void | |
1581 | do_print_to_mapfile(Mapfile* mapfile) const | |
e5d5f5ed | 1582 | { mapfile->print_output_data(this, this->name_); } |
6ce78956 | 1583 | |
cf43a2fe AM |
1584 | private: |
1585 | // The size of an entry in the PLT. | |
1586 | static const int plt_entry_size = size == 32 ? 4 : 24; | |
cf43a2fe | 1587 | |
42cacb20 DE |
1588 | // Write out the PLT data. |
1589 | void | |
1590 | do_write(Output_file*); | |
1591 | ||
1592 | // The reloc section. | |
1593 | Reloc_section* rel_; | |
cf43a2fe AM |
1594 | // Allows access to .glink for do_write. |
1595 | Target_powerpc<size, big_endian>* targ_; | |
e5d5f5ed AM |
1596 | // The size of the first reserved entry. |
1597 | int initial_plt_entry_size_; | |
1598 | // What to report in map file. | |
1599 | const char *name_; | |
42cacb20 DE |
1600 | }; |
1601 | ||
e5d5f5ed | 1602 | // Add an entry to the PLT. |
42cacb20 DE |
1603 | |
1604 | template<int size, bool big_endian> | |
e5d5f5ed AM |
1605 | void |
1606 | Output_data_plt_powerpc<size, big_endian>::add_entry(Symbol* gsym) | |
42cacb20 | 1607 | { |
e5d5f5ed AM |
1608 | if (!gsym->has_plt_offset()) |
1609 | { | |
1610 | off_t off = this->current_data_size(); | |
1611 | if (off == 0) | |
1612 | off += this->first_plt_entry_offset(); | |
1613 | gsym->set_plt_offset(off); | |
1614 | gsym->set_needs_dynsym_entry(); | |
1615 | unsigned int dynrel = elfcpp::R_POWERPC_JMP_SLOT; | |
1616 | this->rel_->add_global(gsym, dynrel, this, off, 0); | |
1617 | off += plt_entry_size; | |
1618 | this->set_current_data_size(off); | |
1619 | } | |
42cacb20 DE |
1620 | } |
1621 | ||
e5d5f5ed | 1622 | // Add an entry for a global ifunc symbol that resolves locally, to the IPLT. |
42cacb20 DE |
1623 | |
1624 | template<int size, bool big_endian> | |
1625 | void | |
e5d5f5ed | 1626 | Output_data_plt_powerpc<size, big_endian>::add_ifunc_entry(Symbol* gsym) |
42cacb20 | 1627 | { |
cf43a2fe AM |
1628 | if (!gsym->has_plt_offset()) |
1629 | { | |
1630 | off_t off = this->current_data_size(); | |
cf43a2fe | 1631 | gsym->set_plt_offset(off); |
e5d5f5ed AM |
1632 | unsigned int dynrel = elfcpp::R_POWERPC_IRELATIVE; |
1633 | if (size == 64) | |
1634 | dynrel = elfcpp::R_PPC64_JMP_IREL; | |
1635 | this->rel_->add_symbolless_global_addend(gsym, dynrel, this, off, 0); | |
1636 | off += plt_entry_size; | |
1637 | this->set_current_data_size(off); | |
1638 | } | |
1639 | } | |
1640 | ||
1641 | // Add an entry for a local ifunc symbol to the IPLT. | |
1642 | ||
1643 | template<int size, bool big_endian> | |
1644 | void | |
1645 | Output_data_plt_powerpc<size, big_endian>::add_local_ifunc_entry( | |
1646 | Sized_relobj_file<size, big_endian>* relobj, | |
1647 | unsigned int local_sym_index) | |
1648 | { | |
1649 | if (!relobj->local_has_plt_offset(local_sym_index)) | |
1650 | { | |
1651 | off_t off = this->current_data_size(); | |
1652 | relobj->set_local_plt_offset(local_sym_index, off); | |
1653 | unsigned int dynrel = elfcpp::R_POWERPC_IRELATIVE; | |
1654 | if (size == 64) | |
1655 | dynrel = elfcpp::R_PPC64_JMP_IREL; | |
1656 | this->rel_->add_symbolless_local_addend(relobj, local_sym_index, dynrel, | |
1657 | this, off, 0); | |
cf43a2fe AM |
1658 | off += plt_entry_size; |
1659 | this->set_current_data_size(off); | |
1660 | } | |
42cacb20 DE |
1661 | } |
1662 | ||
dd93cd0a AM |
1663 | static const uint32_t add_0_11_11 = 0x7c0b5a14; |
1664 | static const uint32_t add_3_3_2 = 0x7c631214; | |
1665 | static const uint32_t add_3_3_13 = 0x7c636a14; | |
1666 | static const uint32_t add_11_0_11 = 0x7d605a14; | |
1667 | static const uint32_t add_12_2_11 = 0x7d825a14; | |
1668 | static const uint32_t addi_11_11 = 0x396b0000; | |
1669 | static const uint32_t addi_12_12 = 0x398c0000; | |
1670 | static const uint32_t addi_2_2 = 0x38420000; | |
1671 | static const uint32_t addi_3_2 = 0x38620000; | |
1672 | static const uint32_t addi_3_3 = 0x38630000; | |
1673 | static const uint32_t addis_0_2 = 0x3c020000; | |
1674 | static const uint32_t addis_0_13 = 0x3c0d0000; | |
c9269dff AM |
1675 | static const uint32_t addis_11_11 = 0x3d6b0000; |
1676 | static const uint32_t addis_11_30 = 0x3d7e0000; | |
1677 | static const uint32_t addis_12_12 = 0x3d8c0000; | |
dd93cd0a AM |
1678 | static const uint32_t addis_12_2 = 0x3d820000; |
1679 | static const uint32_t addis_3_2 = 0x3c620000; | |
1680 | static const uint32_t addis_3_13 = 0x3c6d0000; | |
c9269dff AM |
1681 | static const uint32_t b = 0x48000000; |
1682 | static const uint32_t bcl_20_31 = 0x429f0005; | |
1683 | static const uint32_t bctr = 0x4e800420; | |
1684 | static const uint32_t blrl = 0x4e800021; | |
dd93cd0a AM |
1685 | static const uint32_t cror_15_15_15 = 0x4def7b82; |
1686 | static const uint32_t cror_31_31_31 = 0x4ffffb82; | |
1687 | static const uint32_t ld_11_12 = 0xe96c0000; | |
1688 | static const uint32_t ld_11_2 = 0xe9620000; | |
1689 | static const uint32_t ld_2_1 = 0xe8410000; | |
1690 | static const uint32_t ld_2_11 = 0xe84b0000; | |
1691 | static const uint32_t ld_2_12 = 0xe84c0000; | |
1692 | static const uint32_t ld_2_2 = 0xe8420000; | |
1693 | static const uint32_t li_0_0 = 0x38000000; | |
1694 | static const uint32_t lis_0_0 = 0x3c000000; | |
c9269dff AM |
1695 | static const uint32_t lis_11 = 0x3d600000; |
1696 | static const uint32_t lis_12 = 0x3d800000; | |
c9269dff AM |
1697 | static const uint32_t lwz_0_12 = 0x800c0000; |
1698 | static const uint32_t lwz_11_11 = 0x816b0000; | |
1699 | static const uint32_t lwz_11_30 = 0x817e0000; | |
1700 | static const uint32_t lwz_12_12 = 0x818c0000; | |
dd93cd0a | 1701 | static const uint32_t lwzu_0_12 = 0x840c0000; |
c9269dff | 1702 | static const uint32_t mflr_0 = 0x7c0802a6; |
dd93cd0a | 1703 | static const uint32_t mflr_11 = 0x7d6802a6; |
c9269dff AM |
1704 | static const uint32_t mflr_12 = 0x7d8802a6; |
1705 | static const uint32_t mtctr_0 = 0x7c0903a6; | |
1706 | static const uint32_t mtctr_11 = 0x7d6903a6; | |
1707 | static const uint32_t mtlr_0 = 0x7c0803a6; | |
c9269dff | 1708 | static const uint32_t mtlr_12 = 0x7d8803a6; |
dd93cd0a | 1709 | static const uint32_t nop = 0x60000000; |
c9269dff | 1710 | static const uint32_t ori_0_0_0 = 0x60000000; |
dd93cd0a AM |
1711 | static const uint32_t std_2_1 = 0xf8410000; |
1712 | static const uint32_t sub_11_11_12 = 0x7d6c5850; | |
42cacb20 DE |
1713 | |
1714 | // Write out the PLT. | |
1715 | ||
1716 | template<int size, bool big_endian> | |
1717 | void | |
1718 | Output_data_plt_powerpc<size, big_endian>::do_write(Output_file* of) | |
1719 | { | |
cf43a2fe AM |
1720 | if (size == 32) |
1721 | { | |
1722 | const off_t offset = this->offset(); | |
1723 | const section_size_type oview_size | |
1724 | = convert_to_section_size_type(this->data_size()); | |
1725 | unsigned char* const oview = of->get_output_view(offset, oview_size); | |
1726 | unsigned char* pov = oview; | |
1727 | unsigned char* endpov = oview + oview_size; | |
1728 | ||
e5d5f5ed | 1729 | // The address of the .glink branch table |
cf43a2fe AM |
1730 | const Output_data_glink<size, big_endian>* glink |
1731 | = this->targ_->glink_section(); | |
1732 | elfcpp::Elf_types<32>::Elf_Addr branch_tab | |
1733 | = glink->address() + glink->pltresolve(); | |
1734 | ||
1735 | while (pov < endpov) | |
1736 | { | |
1737 | elfcpp::Swap<32, big_endian>::writeval(pov, branch_tab); | |
1738 | pov += 4; | |
1739 | branch_tab += 4; | |
1740 | } | |
1741 | ||
1742 | of->write_output_view(offset, oview_size, oview); | |
1743 | } | |
1744 | } | |
1745 | ||
1746 | // Create the PLT section. | |
1747 | ||
1748 | template<int size, bool big_endian> | |
1749 | void | |
1750 | Target_powerpc<size, big_endian>::make_plt_section(Layout* layout) | |
1751 | { | |
1752 | if (this->plt_ == NULL) | |
1753 | { | |
1754 | if (this->glink_ == NULL) | |
1755 | make_glink_section(layout); | |
1756 | ||
1757 | // Ensure that .rela.dyn always appears before .rela.plt This is | |
1758 | // necessary due to how, on PowerPC and some other targets, .rela.dyn | |
1759 | // needs to include .rela.plt in it's range. | |
1760 | this->rela_dyn_section(layout); | |
1761 | ||
e5d5f5ed AM |
1762 | Reloc_section* plt_rel = new Reloc_section(false); |
1763 | layout->add_output_section_data(".rela.plt", elfcpp::SHT_RELA, | |
1764 | elfcpp::SHF_ALLOC, plt_rel, | |
1765 | ORDER_DYNAMIC_PLT_RELOCS, false); | |
1766 | this->plt_ | |
1767 | = new Output_data_plt_powerpc<size, big_endian>(this, plt_rel, | |
1768 | size == 32 ? 0 : 24, | |
1769 | "** PLT"); | |
cf43a2fe AM |
1770 | layout->add_output_section_data(".plt", |
1771 | (size == 32 | |
1772 | ? elfcpp::SHT_PROGBITS | |
1773 | : elfcpp::SHT_NOBITS), | |
1774 | elfcpp::SHF_ALLOC | elfcpp::SHF_WRITE, | |
1775 | this->plt_, | |
1776 | (size == 32 | |
1777 | ? ORDER_SMALL_DATA | |
1778 | : ORDER_SMALL_BSS), | |
1779 | false); | |
1780 | } | |
1781 | } | |
1782 | ||
e5d5f5ed AM |
1783 | // Create the IPLT section. |
1784 | ||
1785 | template<int size, bool big_endian> | |
1786 | void | |
1787 | Target_powerpc<size, big_endian>::make_iplt_section(Layout* layout, | |
1788 | Symbol_table* symtab) | |
1789 | { | |
1790 | if (this->iplt_ == NULL) | |
1791 | { | |
1792 | this->make_plt_section(layout); | |
1793 | ||
1794 | Reloc_section* iplt_rel = new Reloc_section(false); | |
1795 | this->rela_dyn_->output_section()->add_output_section_data(iplt_rel); | |
1796 | this->iplt_ | |
1797 | = new Output_data_plt_powerpc<size, big_endian>(this, iplt_rel, | |
1798 | 0, "** IPLT"); | |
1799 | this->plt_->output_section()->add_output_section_data(this->iplt_); | |
1800 | if (parameters->doing_static_link()) | |
1801 | { | |
1802 | symtab->define_in_output_data("__rela_iplt_start", NULL, | |
1803 | Symbol_table::PREDEFINED, | |
1804 | iplt_rel, 0, 0, | |
1805 | elfcpp::STT_NOTYPE, elfcpp::STB_GLOBAL, | |
1806 | elfcpp::STV_HIDDEN, 0, false, true); | |
1807 | symtab->define_in_output_data("__rela_iplt_end", NULL, | |
1808 | Symbol_table::PREDEFINED, | |
1809 | iplt_rel, 0, 0, | |
1810 | elfcpp::STT_NOTYPE, elfcpp::STB_GLOBAL, | |
1811 | elfcpp::STV_HIDDEN, 0, true, true); | |
1812 | } | |
1813 | } | |
1814 | } | |
1815 | ||
cf43a2fe AM |
1816 | // A class to handle .glink. |
1817 | ||
1818 | template<int size, bool big_endian> | |
1819 | class Output_data_glink : public Output_section_data | |
1820 | { | |
1821 | public: | |
c9269dff AM |
1822 | static const int pltresolve_size = 16*4; |
1823 | ||
cf43a2fe AM |
1824 | Output_data_glink(Target_powerpc<size, big_endian>*); |
1825 | ||
1826 | // Add an entry | |
1827 | void | |
1828 | add_entry(const Symbol*, const elfcpp::Rela<size, big_endian>&, | |
e5d5f5ed AM |
1829 | const Sized_relobj_file<size, big_endian>*); |
1830 | ||
1831 | void | |
1832 | add_entry(unsigned int, const elfcpp::Rela<size, big_endian>&, | |
1833 | const Sized_relobj_file<size, big_endian>*); | |
cf43a2fe AM |
1834 | |
1835 | unsigned int | |
1836 | find_entry(const Symbol*, const elfcpp::Rela<size, big_endian>&, | |
e5d5f5ed AM |
1837 | const Sized_relobj_file<size, big_endian>*) const; |
1838 | ||
1839 | unsigned int | |
1840 | find_entry(unsigned int, const elfcpp::Rela<size, big_endian>&, | |
1841 | const Sized_relobj_file<size, big_endian>*) const; | |
cf43a2fe AM |
1842 | |
1843 | unsigned int | |
1844 | glink_entry_size() const | |
1845 | { | |
1846 | if (size == 32) | |
1847 | return 4 * 4; | |
1848 | else | |
1849 | // FIXME: We should be using multiple glink sections for | |
1850 | // stubs to support > 33M applications. | |
1851 | return 8 * 4; | |
1852 | } | |
1853 | ||
1854 | off_t | |
1855 | pltresolve() const | |
1856 | { | |
1857 | return this->pltresolve_; | |
1858 | } | |
1859 | ||
6ce78956 AM |
1860 | protected: |
1861 | // Write to a map file. | |
1862 | void | |
1863 | do_print_to_mapfile(Mapfile* mapfile) const | |
1864 | { mapfile->print_output_data(this, _("** glink")); } | |
1865 | ||
cf43a2fe | 1866 | private: |
cf43a2fe AM |
1867 | void |
1868 | set_final_data_size(); | |
1869 | ||
1870 | // Write out .glink | |
1871 | void | |
1872 | do_write(Output_file*); | |
1873 | ||
d1a8cabd | 1874 | class Glink_sym_ent |
cf43a2fe | 1875 | { |
d1a8cabd AM |
1876 | public: |
1877 | Glink_sym_ent(const Symbol* sym, | |
cf43a2fe | 1878 | const elfcpp::Rela<size, big_endian>& reloc, |
e5d5f5ed AM |
1879 | const Sized_relobj_file<size, big_endian>* object) |
1880 | : sym_(sym), object_(0), addend_(0), locsym_(0) | |
cf43a2fe AM |
1881 | { |
1882 | if (size != 32) | |
1883 | this->addend_ = reloc.get_r_addend(); | |
d1a8cabd AM |
1884 | else if (parameters->options().output_is_position_independent() |
1885 | && (elfcpp::elf_r_type<size>(reloc.get_r_info()) | |
1886 | == elfcpp::R_PPC_PLTREL24)) | |
cf43a2fe | 1887 | { |
d1a8cabd | 1888 | this->addend_ = reloc.get_r_addend(); |
e5d5f5ed | 1889 | if (this->addend_ >= 32768) |
d1a8cabd | 1890 | this->object_ = object; |
cf43a2fe AM |
1891 | } |
1892 | } | |
1893 | ||
e5d5f5ed AM |
1894 | Glink_sym_ent(unsigned int locsym_index, |
1895 | const elfcpp::Rela<size, big_endian>& reloc, | |
1896 | const Sized_relobj_file<size, big_endian>* object) | |
1897 | : sym_(NULL), object_(object), addend_(0), locsym_(locsym_index) | |
1898 | { | |
1899 | if (size != 32) | |
1900 | this->addend_ = reloc.get_r_addend(); | |
1901 | else if (parameters->options().output_is_position_independent() | |
1902 | && (elfcpp::elf_r_type<size>(reloc.get_r_info()) | |
1903 | == elfcpp::R_PPC_PLTREL24)) | |
1904 | this->addend_ = reloc.get_r_addend(); | |
1905 | } | |
1906 | ||
cf43a2fe AM |
1907 | bool operator==(const Glink_sym_ent& that) const |
1908 | { | |
1909 | return (this->sym_ == that.sym_ | |
1910 | && this->object_ == that.object_ | |
e5d5f5ed AM |
1911 | && this->addend_ == that.addend_ |
1912 | && this->locsym_ == that.locsym_); | |
cf43a2fe | 1913 | } |
c9269dff AM |
1914 | |
1915 | const Symbol* sym_; | |
e5d5f5ed AM |
1916 | const Sized_relobj_file<size, big_endian>* object_; |
1917 | typename elfcpp::Elf_types<size>::Elf_Addr addend_; | |
1918 | unsigned int locsym_; | |
cf43a2fe AM |
1919 | }; |
1920 | ||
d1a8cabd | 1921 | class Glink_sym_ent_hash |
cf43a2fe | 1922 | { |
d1a8cabd | 1923 | public: |
cf43a2fe AM |
1924 | size_t operator()(const Glink_sym_ent& ent) const |
1925 | { | |
1926 | return (reinterpret_cast<uintptr_t>(ent.sym_) | |
1927 | ^ reinterpret_cast<uintptr_t>(ent.object_) | |
e5d5f5ed AM |
1928 | ^ ent.addend_ |
1929 | ^ ent.locsym_); | |
cf43a2fe AM |
1930 | } |
1931 | }; | |
1932 | ||
d1a8cabd | 1933 | // Map sym/object/addend to index. |
cf43a2fe AM |
1934 | typedef Unordered_map<Glink_sym_ent, unsigned int, |
1935 | Glink_sym_ent_hash> Glink_entries; | |
1936 | Glink_entries glink_entries_; | |
1937 | ||
1938 | // Offset of pltresolve stub (actually, branch table for 32-bit) | |
1939 | off_t pltresolve_; | |
1940 | ||
1941 | // Allows access to .got and .plt for do_write. | |
1942 | Target_powerpc<size, big_endian>* targ_; | |
1943 | }; | |
1944 | ||
1945 | // Create the glink section. | |
1946 | ||
1947 | template<int size, bool big_endian> | |
d83ce4e3 AM |
1948 | Output_data_glink<size, big_endian>::Output_data_glink( |
1949 | Target_powerpc<size, big_endian>* targ) | |
cf43a2fe AM |
1950 | : Output_section_data(16), |
1951 | pltresolve_(0), targ_(targ) | |
1952 | { | |
1953 | } | |
1954 | ||
1955 | // Add an entry to glink, if we do not already have one for this | |
d1a8cabd | 1956 | // sym/object/addend combo. |
cf43a2fe AM |
1957 | |
1958 | template<int size, bool big_endian> | |
1959 | void | |
d83ce4e3 AM |
1960 | Output_data_glink<size, big_endian>::add_entry( |
1961 | const Symbol* gsym, | |
1962 | const elfcpp::Rela<size, big_endian>& reloc, | |
e5d5f5ed | 1963 | const Sized_relobj_file<size, big_endian>* object) |
cf43a2fe | 1964 | { |
d1a8cabd | 1965 | Glink_sym_ent ent(gsym, reloc, object); |
cf43a2fe | 1966 | unsigned int indx = this->glink_entries_.size(); |
d83ce4e3 | 1967 | this->glink_entries_.insert(std::make_pair(ent, indx)); |
cf43a2fe AM |
1968 | } |
1969 | ||
e5d5f5ed AM |
1970 | template<int size, bool big_endian> |
1971 | void | |
1972 | Output_data_glink<size, big_endian>::add_entry( | |
1973 | unsigned int locsym_index, | |
1974 | const elfcpp::Rela<size, big_endian>& reloc, | |
1975 | const Sized_relobj_file<size, big_endian>* object) | |
1976 | { | |
1977 | Glink_sym_ent ent(locsym_index, reloc, object); | |
1978 | unsigned int indx = this->glink_entries_.size(); | |
1979 | this->glink_entries_.insert(std::make_pair(ent, indx)); | |
1980 | } | |
1981 | ||
cf43a2fe AM |
1982 | template<int size, bool big_endian> |
1983 | unsigned int | |
d83ce4e3 AM |
1984 | Output_data_glink<size, big_endian>::find_entry( |
1985 | const Symbol* gsym, | |
1986 | const elfcpp::Rela<size, big_endian>& reloc, | |
e5d5f5ed | 1987 | const Sized_relobj_file<size, big_endian>* object) const |
cf43a2fe | 1988 | { |
d1a8cabd | 1989 | Glink_sym_ent ent(gsym, reloc, object); |
cf43a2fe AM |
1990 | typename Glink_entries::const_iterator p = this->glink_entries_.find(ent); |
1991 | gold_assert(p != this->glink_entries_.end()); | |
1992 | return p->second; | |
1993 | } | |
1994 | ||
e5d5f5ed AM |
1995 | template<int size, bool big_endian> |
1996 | unsigned int | |
1997 | Output_data_glink<size, big_endian>::find_entry( | |
1998 | unsigned int locsym_index, | |
1999 | const elfcpp::Rela<size, big_endian>& reloc, | |
2000 | const Sized_relobj_file<size, big_endian>* object) const | |
2001 | { | |
2002 | Glink_sym_ent ent(locsym_index, reloc, object); | |
2003 | typename Glink_entries::const_iterator p = this->glink_entries_.find(ent); | |
2004 | gold_assert(p != this->glink_entries_.end()); | |
2005 | return p->second; | |
2006 | } | |
2007 | ||
cf43a2fe AM |
2008 | template<int size, bool big_endian> |
2009 | void | |
2010 | Output_data_glink<size, big_endian>::set_final_data_size() | |
2011 | { | |
2012 | unsigned int count = this->glink_entries_.size(); | |
2013 | off_t total = count; | |
2014 | ||
2015 | if (count != 0) | |
2016 | { | |
2017 | if (size == 32) | |
2018 | { | |
2019 | total *= 16; | |
2020 | this->pltresolve_ = total; | |
2021 | ||
2022 | // space for branch table | |
2023 | total += 4 * (count - 1); | |
2024 | ||
2025 | total += -total & 15; | |
2026 | total += this->pltresolve_size; | |
2027 | } | |
2028 | else | |
2029 | { | |
2030 | total *= 32; | |
2031 | this->pltresolve_ = total; | |
2032 | total += this->pltresolve_size; | |
2033 | ||
2034 | // space for branch table | |
2035 | total += 8 * count; | |
2036 | if (count > 0x8000) | |
2037 | total += 4 * (count - 0x8000); | |
2038 | } | |
2039 | } | |
2040 | ||
2041 | this->set_data_size(total); | |
2042 | } | |
2043 | ||
2044 | static inline uint32_t | |
2045 | l(uint32_t a) | |
2046 | { | |
2047 | return a & 0xffff; | |
2048 | } | |
2049 | ||
2050 | static inline uint32_t | |
2051 | hi(uint32_t a) | |
2052 | { | |
2053 | return l(a >> 16); | |
2054 | } | |
2055 | ||
2056 | static inline uint32_t | |
2057 | ha(uint32_t a) | |
2058 | { | |
2059 | return hi(a + 0x8000); | |
2060 | } | |
2061 | ||
2062 | template<bool big_endian> | |
2063 | static inline void | |
c9269dff | 2064 | write_insn(unsigned char* p, uint32_t v) |
cf43a2fe AM |
2065 | { |
2066 | elfcpp::Swap<32, big_endian>::writeval(p, v); | |
2067 | } | |
2068 | ||
2069 | // Write out .glink. | |
2070 | ||
2071 | template<int size, bool big_endian> | |
2072 | void | |
2073 | Output_data_glink<size, big_endian>::do_write(Output_file* of) | |
2074 | { | |
2075 | const off_t off = this->offset(); | |
42cacb20 DE |
2076 | const section_size_type oview_size = |
2077 | convert_to_section_size_type(this->data_size()); | |
cf43a2fe | 2078 | unsigned char* const oview = of->get_output_view(off, oview_size); |
c9269dff | 2079 | unsigned char* p; |
42cacb20 | 2080 | |
cf43a2fe | 2081 | // The base address of the .plt section. |
dd93cd0a | 2082 | typedef typename elfcpp::Elf_types<size>::Elf_Addr Address; |
e5d5f5ed | 2083 | static const Address invalid_address = static_cast<Address>(0) - 1; |
dd93cd0a | 2084 | Address plt_base = this->targ_->plt_section()->address(); |
e5d5f5ed | 2085 | Address iplt_base = invalid_address; |
cf43a2fe | 2086 | |
dd93cd0a AM |
2087 | const Output_data_got_powerpc<size, big_endian>* got |
2088 | = this->targ_->got_section(); | |
cf43a2fe AM |
2089 | |
2090 | if (size == 64) | |
2091 | { | |
dd93cd0a | 2092 | Address got_os_addr = got->output_section()->address(); |
c9269dff | 2093 | |
cf43a2fe AM |
2094 | // Write out call stubs. |
2095 | typename Glink_entries::const_iterator g; | |
2096 | for (g = this->glink_entries_.begin(); | |
2097 | g != this->glink_entries_.end(); | |
2098 | ++g) | |
2099 | { | |
e5d5f5ed AM |
2100 | Address plt_addr; |
2101 | bool is_ifunc; | |
2102 | const Symbol* gsym = g->first.sym_; | |
2103 | if (gsym != NULL) | |
2104 | { | |
2105 | is_ifunc = (gsym->type() == elfcpp::STT_GNU_IFUNC | |
2106 | && gsym->can_use_relative_reloc(false)); | |
2107 | plt_addr = gsym->plt_offset(); | |
2108 | } | |
2109 | else | |
2110 | { | |
2111 | is_ifunc = true; | |
2112 | const Sized_relobj_file<size, big_endian>* relobj | |
2113 | = g->first.object_; | |
2114 | unsigned int local_sym_index = g->first.locsym_; | |
2115 | plt_addr = relobj->local_plt_offset(local_sym_index); | |
2116 | } | |
2117 | if (is_ifunc) | |
2118 | { | |
2119 | if (iplt_base == invalid_address) | |
2120 | iplt_base = this->targ_->iplt_section()->address(); | |
2121 | plt_addr += iplt_base; | |
2122 | } | |
2123 | else | |
2124 | plt_addr += plt_base; | |
dd93cd0a AM |
2125 | const Powerpc_relobj<size, big_endian>* ppcobj = static_cast |
2126 | <const Powerpc_relobj<size, big_endian>*>(g->first.object_); | |
2127 | Address got_addr = got_os_addr + ppcobj->toc_base_offset(); | |
2128 | Address pltoff = plt_addr - got_addr; | |
cf43a2fe AM |
2129 | |
2130 | if (pltoff + 0x80008000 > 0xffffffff || (pltoff & 7) != 0) | |
2131 | gold_error(_("%s: linkage table error against `%s'"), | |
2132 | g->first.object_->name().c_str(), | |
2133 | g->first.sym_->demangled_name().c_str()); | |
2134 | ||
2135 | p = oview + g->second * this->glink_entry_size(); | |
2136 | if (ha(pltoff) != 0) | |
2137 | { | |
2138 | write_insn<big_endian>(p, addis_12_2 + ha(pltoff)), p += 4; | |
2139 | write_insn<big_endian>(p, std_2_1 + 40), p += 4; | |
2140 | write_insn<big_endian>(p, ld_11_12 + l(pltoff)), p += 4; | |
2141 | if (ha(pltoff + 16) != ha(pltoff)) | |
2142 | { | |
2143 | write_insn<big_endian>(p, addi_12_12 + l(pltoff)), p += 4; | |
2144 | pltoff = 0; | |
2145 | } | |
2146 | write_insn<big_endian>(p, mtctr_11), p += 4; | |
2147 | write_insn<big_endian>(p, ld_2_12 + l(pltoff + 8)), p += 4; | |
2148 | write_insn<big_endian>(p, ld_11_12 + l(pltoff + 16)), p += 4; | |
2149 | write_insn<big_endian>(p, bctr), p += 4; | |
2150 | } | |
2151 | else | |
2152 | { | |
2153 | write_insn<big_endian>(p, std_2_1 + 40), p += 4; | |
2154 | write_insn<big_endian>(p, ld_11_2 + l(pltoff)), p += 4; | |
2155 | if (ha(pltoff + 16) != ha(pltoff)) | |
2156 | { | |
2157 | write_insn<big_endian>(p, addi_2_2 + l(pltoff)), p += 4; | |
2158 | pltoff = 0; | |
2159 | } | |
2160 | write_insn<big_endian>(p, mtctr_11), p += 4; | |
2161 | write_insn<big_endian>(p, ld_11_2 + l(pltoff + 16)), p += 4; | |
2162 | write_insn<big_endian>(p, ld_2_2 + l(pltoff + 8)), p += 4; | |
2163 | write_insn<big_endian>(p, bctr), p += 4; | |
2164 | } | |
2165 | } | |
2166 | ||
2167 | // Write pltresolve stub. | |
2168 | p = oview + this->pltresolve_; | |
dd93cd0a AM |
2169 | Address after_bcl = this->address() + this->pltresolve_ + 16; |
2170 | Address pltoff = plt_base - after_bcl; | |
cf43a2fe AM |
2171 | |
2172 | elfcpp::Swap<64, big_endian>::writeval(p, pltoff), p += 8; | |
2173 | ||
2174 | write_insn<big_endian>(p, mflr_12), p += 4; | |
2175 | write_insn<big_endian>(p, bcl_20_31), p += 4; | |
2176 | write_insn<big_endian>(p, mflr_11), p += 4; | |
2177 | write_insn<big_endian>(p, ld_2_11 + l(-16)), p += 4; | |
2178 | write_insn<big_endian>(p, mtlr_12), p += 4; | |
2179 | write_insn<big_endian>(p, add_12_2_11), p += 4; | |
2180 | write_insn<big_endian>(p, ld_11_12 + 0), p += 4; | |
2181 | write_insn<big_endian>(p, ld_2_12 + 8), p += 4; | |
2182 | write_insn<big_endian>(p, mtctr_11), p += 4; | |
2183 | write_insn<big_endian>(p, ld_11_12 + 16), p += 4; | |
2184 | write_insn<big_endian>(p, bctr), p += 4; | |
2185 | while (p < oview + this->pltresolve_ + this->pltresolve_size) | |
2186 | write_insn<big_endian>(p, nop), p += 4; | |
2187 | ||
2188 | // Write lazy link call stubs. | |
2189 | uint32_t indx = 0; | |
2190 | while (p < oview + oview_size) | |
2191 | { | |
2192 | if (indx < 0x8000) | |
2193 | { | |
2194 | write_insn<big_endian>(p, li_0_0 + indx), p += 4; | |
2195 | } | |
2196 | else | |
2197 | { | |
2198 | write_insn<big_endian>(p, lis_0_0 + hi(indx)), p += 4; | |
2199 | write_insn<big_endian>(p, ori_0_0_0 + l(indx)), p += 4; | |
2200 | } | |
c9269dff | 2201 | uint32_t branch_off = this->pltresolve_ + 8 - (p - oview); |
cf43a2fe AM |
2202 | write_insn<big_endian>(p, b + (branch_off & 0x3fffffc)), p += 4; |
2203 | indx++; | |
2204 | } | |
2205 | } | |
2206 | else | |
2207 | { | |
dd93cd0a AM |
2208 | // The address of _GLOBAL_OFFSET_TABLE_. |
2209 | Address g_o_t = got->address() + got->g_o_t(); | |
c9269dff | 2210 | |
cf43a2fe AM |
2211 | // Write out call stubs. |
2212 | typename Glink_entries::const_iterator g; | |
2213 | for (g = this->glink_entries_.begin(); | |
2214 | g != this->glink_entries_.end(); | |
2215 | ++g) | |
2216 | { | |
e5d5f5ed AM |
2217 | Address plt_addr; |
2218 | bool is_ifunc; | |
2219 | const Symbol* gsym = g->first.sym_; | |
2220 | if (gsym != NULL) | |
2221 | { | |
2222 | is_ifunc = (gsym->type() == elfcpp::STT_GNU_IFUNC | |
2223 | && gsym->can_use_relative_reloc(false)); | |
2224 | plt_addr = gsym->plt_offset(); | |
2225 | } | |
2226 | else | |
2227 | { | |
2228 | is_ifunc = true; | |
2229 | const Sized_relobj_file<size, big_endian>* relobj | |
2230 | = g->first.object_; | |
2231 | unsigned int local_sym_index = g->first.locsym_; | |
2232 | plt_addr = relobj->local_plt_offset(local_sym_index); | |
2233 | } | |
2234 | if (is_ifunc) | |
2235 | { | |
2236 | if (iplt_base == invalid_address) | |
2237 | iplt_base = this->targ_->iplt_section()->address(); | |
2238 | plt_addr += iplt_base; | |
2239 | } | |
2240 | else | |
2241 | plt_addr += plt_base; | |
cf43a2fe AM |
2242 | |
2243 | p = oview + g->second * this->glink_entry_size(); | |
2244 | if (parameters->options().output_is_position_independent()) | |
2245 | { | |
e5d5f5ed | 2246 | Address got_addr; |
d1a8cabd AM |
2247 | const Powerpc_relobj<size, big_endian>* object = static_cast |
2248 | <const Powerpc_relobj<size, big_endian>*>(g->first.object_); | |
e5d5f5ed | 2249 | if (object != NULL && g->first.addend_ >= 32768) |
d1a8cabd AM |
2250 | { |
2251 | unsigned int got2 = object->got2_shndx(); | |
c9269dff AM |
2252 | got_addr = g->first.object_->get_output_section_offset(got2); |
2253 | gold_assert(got_addr != invalid_address); | |
2254 | got_addr += (g->first.object_->output_section(got2)->address() | |
2255 | + g->first.addend_); | |
d1a8cabd | 2256 | } |
cf43a2fe AM |
2257 | else |
2258 | got_addr = g_o_t; | |
2259 | ||
dd93cd0a | 2260 | Address pltoff = plt_addr - got_addr; |
cf43a2fe AM |
2261 | if (ha(pltoff) == 0) |
2262 | { | |
2263 | write_insn<big_endian>(p + 0, lwz_11_30 + l(pltoff)); | |
2264 | write_insn<big_endian>(p + 4, mtctr_11); | |
2265 | write_insn<big_endian>(p + 8, bctr); | |
2266 | } | |
2267 | else | |
2268 | { | |
2269 | write_insn<big_endian>(p + 0, addis_11_30 + ha(pltoff)); | |
2270 | write_insn<big_endian>(p + 4, lwz_11_11 + l(pltoff)); | |
2271 | write_insn<big_endian>(p + 8, mtctr_11); | |
2272 | write_insn<big_endian>(p + 12, bctr); | |
2273 | } | |
2274 | } | |
2275 | else | |
2276 | { | |
2277 | write_insn<big_endian>(p + 0, lis_11 + ha(plt_addr)); | |
2278 | write_insn<big_endian>(p + 4, lwz_11_11 + l(plt_addr)); | |
2279 | write_insn<big_endian>(p + 8, mtctr_11); | |
2280 | write_insn<big_endian>(p + 12, bctr); | |
2281 | } | |
2282 | } | |
42cacb20 | 2283 | |
cf43a2fe AM |
2284 | // Write out pltresolve branch table. |
2285 | p = oview + this->pltresolve_; | |
2286 | unsigned int the_end = oview_size - this->pltresolve_size; | |
c9269dff | 2287 | unsigned char* end_p = oview + the_end; |
cf43a2fe AM |
2288 | while (p < end_p - 8 * 4) |
2289 | write_insn<big_endian>(p, b + end_p - p), p += 4; | |
2290 | while (p < end_p) | |
2291 | write_insn<big_endian>(p, nop), p += 4; | |
42cacb20 | 2292 | |
cf43a2fe AM |
2293 | // Write out pltresolve call stub. |
2294 | if (parameters->options().output_is_position_independent()) | |
42cacb20 | 2295 | { |
dd93cd0a AM |
2296 | Address res0_off = this->pltresolve_; |
2297 | Address after_bcl_off = the_end + 12; | |
2298 | Address bcl_res0 = after_bcl_off - res0_off; | |
cf43a2fe AM |
2299 | |
2300 | write_insn<big_endian>(p + 0, addis_11_11 + ha(bcl_res0)); | |
2301 | write_insn<big_endian>(p + 4, mflr_0); | |
2302 | write_insn<big_endian>(p + 8, bcl_20_31); | |
2303 | write_insn<big_endian>(p + 12, addi_11_11 + l(bcl_res0)); | |
2304 | write_insn<big_endian>(p + 16, mflr_12); | |
2305 | write_insn<big_endian>(p + 20, mtlr_0); | |
2306 | write_insn<big_endian>(p + 24, sub_11_11_12); | |
2307 | ||
dd93cd0a | 2308 | Address got_bcl = g_o_t + 4 - (after_bcl_off + this->address()); |
cf43a2fe AM |
2309 | |
2310 | write_insn<big_endian>(p + 28, addis_12_12 + ha(got_bcl)); | |
2311 | if (ha(got_bcl) == ha(got_bcl + 4)) | |
2312 | { | |
2313 | write_insn<big_endian>(p + 32, lwz_0_12 + l(got_bcl)); | |
2314 | write_insn<big_endian>(p + 36, lwz_12_12 + l(got_bcl + 4)); | |
2315 | } | |
2316 | else | |
2317 | { | |
2318 | write_insn<big_endian>(p + 32, lwzu_0_12 + l(got_bcl)); | |
2319 | write_insn<big_endian>(p + 36, lwz_12_12 + 4); | |
2320 | } | |
2321 | write_insn<big_endian>(p + 40, mtctr_0); | |
2322 | write_insn<big_endian>(p + 44, add_0_11_11); | |
2323 | write_insn<big_endian>(p + 48, add_11_0_11); | |
2324 | write_insn<big_endian>(p + 52, bctr); | |
2325 | write_insn<big_endian>(p + 56, nop); | |
2326 | write_insn<big_endian>(p + 60, nop); | |
42cacb20 | 2327 | } |
cf43a2fe | 2328 | else |
42cacb20 | 2329 | { |
dd93cd0a | 2330 | Address res0 = this->pltresolve_ + this->address(); |
cf43a2fe AM |
2331 | |
2332 | write_insn<big_endian>(p + 0, lis_12 + ha(g_o_t + 4)); | |
2333 | write_insn<big_endian>(p + 4, addis_11_11 + ha(-res0)); | |
2334 | if (ha(g_o_t + 4) == ha(g_o_t + 8)) | |
2335 | write_insn<big_endian>(p + 8, lwz_0_12 + l(g_o_t + 4)); | |
2336 | else | |
2337 | write_insn<big_endian>(p + 8, lwzu_0_12 + l(g_o_t + 4)); | |
2338 | write_insn<big_endian>(p + 12, addi_11_11 + l(-res0)); | |
2339 | write_insn<big_endian>(p + 16, mtctr_0); | |
2340 | write_insn<big_endian>(p + 20, add_0_11_11); | |
2341 | if (ha(g_o_t + 4) == ha(g_o_t + 8)) | |
2342 | write_insn<big_endian>(p + 24, lwz_12_12 + l(g_o_t + 8)); | |
2343 | else | |
2344 | write_insn<big_endian>(p + 24, lwz_12_12 + 4); | |
2345 | write_insn<big_endian>(p + 28, add_11_0_11); | |
2346 | write_insn<big_endian>(p + 32, bctr); | |
2347 | write_insn<big_endian>(p + 36, nop); | |
2348 | write_insn<big_endian>(p + 40, nop); | |
2349 | write_insn<big_endian>(p + 44, nop); | |
2350 | write_insn<big_endian>(p + 48, nop); | |
2351 | write_insn<big_endian>(p + 52, nop); | |
2352 | write_insn<big_endian>(p + 56, nop); | |
2353 | write_insn<big_endian>(p + 60, nop); | |
42cacb20 | 2354 | } |
cf43a2fe | 2355 | p += 64; |
42cacb20 DE |
2356 | } |
2357 | ||
cf43a2fe AM |
2358 | of->write_output_view(off, oview_size, oview); |
2359 | } | |
2360 | ||
2361 | // Create the glink section. | |
42cacb20 | 2362 | |
cf43a2fe AM |
2363 | template<int size, bool big_endian> |
2364 | void | |
2365 | Target_powerpc<size, big_endian>::make_glink_section(Layout* layout) | |
2366 | { | |
2367 | if (this->glink_ == NULL) | |
2368 | { | |
2369 | this->glink_ = new Output_data_glink<size, big_endian>(this); | |
2370 | layout->add_output_section_data(".text", elfcpp::SHT_PROGBITS, | |
2371 | elfcpp::SHF_ALLOC | elfcpp::SHF_EXECINSTR, | |
2372 | this->glink_, ORDER_TEXT, false); | |
2373 | } | |
42cacb20 DE |
2374 | } |
2375 | ||
2376 | // Create a PLT entry for a global symbol. | |
2377 | ||
2378 | template<int size, bool big_endian> | |
2379 | void | |
d83ce4e3 AM |
2380 | Target_powerpc<size, big_endian>::make_plt_entry( |
2381 | Layout* layout, | |
e5d5f5ed | 2382 | Symbol_table* symtab, |
d83ce4e3 AM |
2383 | Symbol* gsym, |
2384 | const elfcpp::Rela<size, big_endian>& reloc, | |
e5d5f5ed | 2385 | const Sized_relobj_file<size, big_endian>* object) |
42cacb20 | 2386 | { |
e5d5f5ed AM |
2387 | if (gsym->type() == elfcpp::STT_GNU_IFUNC |
2388 | && gsym->can_use_relative_reloc(false)) | |
2389 | { | |
2390 | if (this->iplt_ == NULL) | |
2391 | this->make_iplt_section(layout, symtab); | |
2392 | this->iplt_->add_ifunc_entry(gsym); | |
2393 | } | |
2394 | else | |
2395 | { | |
2396 | if (this->plt_ == NULL) | |
2397 | this->make_plt_section(layout); | |
2398 | this->plt_->add_entry(gsym); | |
2399 | } | |
2400 | this->glink_->add_entry(gsym, reloc, object); | |
2401 | } | |
42cacb20 | 2402 | |
e5d5f5ed | 2403 | // Make a PLT entry for a local STT_GNU_IFUNC symbol. |
612a8d3d | 2404 | |
e5d5f5ed AM |
2405 | template<int size, bool big_endian> |
2406 | void | |
2407 | Target_powerpc<size, big_endian>::make_local_ifunc_plt_entry( | |
2408 | Layout* layout, | |
2409 | Symbol_table* symtab, | |
2410 | const elfcpp::Rela<size, big_endian>& reloc, | |
2411 | Sized_relobj_file<size, big_endian>* relobj) | |
2412 | { | |
2413 | if (this->iplt_ == NULL) | |
2414 | this->make_iplt_section(layout, symtab); | |
2415 | unsigned int r_sym = elfcpp::elf_r_sym<size>(reloc.get_r_info()); | |
2416 | this->iplt_->add_local_ifunc_entry(relobj, r_sym); | |
2417 | this->glink_->add_entry(r_sym, reloc, relobj); | |
42cacb20 DE |
2418 | } |
2419 | ||
0e70b911 CC |
2420 | // Return the number of entries in the PLT. |
2421 | ||
2422 | template<int size, bool big_endian> | |
2423 | unsigned int | |
2424 | Target_powerpc<size, big_endian>::plt_entry_count() const | |
2425 | { | |
2426 | if (this->plt_ == NULL) | |
2427 | return 0; | |
e5d5f5ed AM |
2428 | unsigned int count = this->plt_->entry_count(); |
2429 | if (this->iplt_ != NULL) | |
2430 | count += this->iplt_->entry_count(); | |
2431 | return count; | |
0e70b911 CC |
2432 | } |
2433 | ||
2434 | // Return the offset of the first non-reserved PLT entry. | |
2435 | ||
2436 | template<int size, bool big_endian> | |
2437 | unsigned int | |
2438 | Target_powerpc<size, big_endian>::first_plt_entry_offset() const | |
2439 | { | |
e5d5f5ed | 2440 | return this->plt_->first_plt_entry_offset(); |
0e70b911 CC |
2441 | } |
2442 | ||
2443 | // Return the size of each PLT entry. | |
2444 | ||
2445 | template<int size, bool big_endian> | |
2446 | unsigned int | |
2447 | Target_powerpc<size, big_endian>::plt_entry_size() const | |
2448 | { | |
2449 | return Output_data_plt_powerpc<size, big_endian>::get_plt_entry_size(); | |
2450 | } | |
2451 | ||
dd93cd0a | 2452 | // Create a GOT entry for local dynamic __tls_get_addr calls. |
42cacb20 DE |
2453 | |
2454 | template<int size, bool big_endian> | |
2455 | unsigned int | |
dd93cd0a | 2456 | Target_powerpc<size, big_endian>::tlsld_got_offset( |
6fa2a40b CC |
2457 | Symbol_table* symtab, |
2458 | Layout* layout, | |
2459 | Sized_relobj_file<size, big_endian>* object) | |
42cacb20 | 2460 | { |
dd93cd0a | 2461 | if (this->tlsld_got_offset_ == -1U) |
42cacb20 DE |
2462 | { |
2463 | gold_assert(symtab != NULL && layout != NULL && object != NULL); | |
2464 | Reloc_section* rela_dyn = this->rela_dyn_section(layout); | |
dd93cd0a AM |
2465 | Output_data_got_powerpc<size, big_endian>* got |
2466 | = this->got_section(symtab, layout); | |
2467 | unsigned int got_offset = got->add_constant_pair(0, 0); | |
42cacb20 DE |
2468 | rela_dyn->add_local(object, 0, elfcpp::R_POWERPC_DTPMOD, got, |
2469 | got_offset, 0); | |
dd93cd0a | 2470 | this->tlsld_got_offset_ = got_offset; |
42cacb20 | 2471 | } |
dd93cd0a | 2472 | return this->tlsld_got_offset_; |
42cacb20 DE |
2473 | } |
2474 | ||
95a2c8d6 RS |
2475 | // Get the Reference_flags for a particular relocation. |
2476 | ||
2477 | template<int size, bool big_endian> | |
2478 | int | |
d83ce4e3 | 2479 | Target_powerpc<size, big_endian>::Scan::get_reference_flags(unsigned int r_type) |
95a2c8d6 RS |
2480 | { |
2481 | switch (r_type) | |
2482 | { | |
2483 | case elfcpp::R_POWERPC_NONE: | |
2484 | case elfcpp::R_POWERPC_GNU_VTINHERIT: | |
2485 | case elfcpp::R_POWERPC_GNU_VTENTRY: | |
2486 | case elfcpp::R_PPC64_TOC: | |
2487 | // No symbol reference. | |
2488 | return 0; | |
2489 | ||
dd93cd0a AM |
2490 | case elfcpp::R_PPC64_ADDR64: |
2491 | case elfcpp::R_PPC64_UADDR64: | |
2492 | case elfcpp::R_POWERPC_ADDR32: | |
2493 | case elfcpp::R_POWERPC_UADDR32: | |
95a2c8d6 | 2494 | case elfcpp::R_POWERPC_ADDR16: |
dd93cd0a | 2495 | case elfcpp::R_POWERPC_UADDR16: |
95a2c8d6 RS |
2496 | case elfcpp::R_POWERPC_ADDR16_LO: |
2497 | case elfcpp::R_POWERPC_ADDR16_HI: | |
2498 | case elfcpp::R_POWERPC_ADDR16_HA: | |
95a2c8d6 RS |
2499 | return Symbol::ABSOLUTE_REF; |
2500 | ||
dd93cd0a AM |
2501 | case elfcpp::R_POWERPC_ADDR24: |
2502 | case elfcpp::R_POWERPC_ADDR14: | |
2503 | case elfcpp::R_POWERPC_ADDR14_BRTAKEN: | |
2504 | case elfcpp::R_POWERPC_ADDR14_BRNTAKEN: | |
2505 | return Symbol::FUNCTION_CALL | Symbol::ABSOLUTE_REF; | |
2506 | ||
e5d5f5ed | 2507 | case elfcpp::R_PPC64_REL64: |
dd93cd0a | 2508 | case elfcpp::R_POWERPC_REL32: |
95a2c8d6 | 2509 | case elfcpp::R_PPC_LOCAL24PC: |
6ce78956 AM |
2510 | case elfcpp::R_POWERPC_REL16: |
2511 | case elfcpp::R_POWERPC_REL16_LO: | |
2512 | case elfcpp::R_POWERPC_REL16_HI: | |
2513 | case elfcpp::R_POWERPC_REL16_HA: | |
95a2c8d6 RS |
2514 | return Symbol::RELATIVE_REF; |
2515 | ||
dd93cd0a | 2516 | case elfcpp::R_POWERPC_REL24: |
95a2c8d6 | 2517 | case elfcpp::R_PPC_PLTREL24: |
dd93cd0a AM |
2518 | case elfcpp::R_POWERPC_REL14: |
2519 | case elfcpp::R_POWERPC_REL14_BRTAKEN: | |
2520 | case elfcpp::R_POWERPC_REL14_BRNTAKEN: | |
95a2c8d6 RS |
2521 | return Symbol::FUNCTION_CALL | Symbol::RELATIVE_REF; |
2522 | ||
2523 | case elfcpp::R_POWERPC_GOT16: | |
2524 | case elfcpp::R_POWERPC_GOT16_LO: | |
2525 | case elfcpp::R_POWERPC_GOT16_HI: | |
2526 | case elfcpp::R_POWERPC_GOT16_HA: | |
e5d5f5ed AM |
2527 | case elfcpp::R_PPC64_GOT16_DS: |
2528 | case elfcpp::R_PPC64_GOT16_LO_DS: | |
95a2c8d6 RS |
2529 | case elfcpp::R_PPC64_TOC16: |
2530 | case elfcpp::R_PPC64_TOC16_LO: | |
2531 | case elfcpp::R_PPC64_TOC16_HI: | |
2532 | case elfcpp::R_PPC64_TOC16_HA: | |
2533 | case elfcpp::R_PPC64_TOC16_DS: | |
2534 | case elfcpp::R_PPC64_TOC16_LO_DS: | |
2535 | // Absolute in GOT. | |
2536 | return Symbol::ABSOLUTE_REF; | |
2537 | ||
2538 | case elfcpp::R_POWERPC_GOT_TPREL16: | |
2539 | case elfcpp::R_POWERPC_TLS: | |
2540 | return Symbol::TLS_REF; | |
2541 | ||
2542 | case elfcpp::R_POWERPC_COPY: | |
2543 | case elfcpp::R_POWERPC_GLOB_DAT: | |
2544 | case elfcpp::R_POWERPC_JMP_SLOT: | |
2545 | case elfcpp::R_POWERPC_RELATIVE: | |
2546 | case elfcpp::R_POWERPC_DTPMOD: | |
2547 | default: | |
2548 | // Not expected. We will give an error later. | |
2549 | return 0; | |
2550 | } | |
2551 | } | |
2552 | ||
42cacb20 DE |
2553 | // Report an unsupported relocation against a local symbol. |
2554 | ||
2555 | template<int size, bool big_endian> | |
2556 | void | |
2557 | Target_powerpc<size, big_endian>::Scan::unsupported_reloc_local( | |
d83ce4e3 AM |
2558 | Sized_relobj_file<size, big_endian>* object, |
2559 | unsigned int r_type) | |
42cacb20 DE |
2560 | { |
2561 | gold_error(_("%s: unsupported reloc %u against local symbol"), | |
2562 | object->name().c_str(), r_type); | |
2563 | } | |
2564 | ||
2565 | // We are about to emit a dynamic relocation of type R_TYPE. If the | |
2566 | // dynamic linker does not support it, issue an error. | |
2567 | ||
2568 | template<int size, bool big_endian> | |
2569 | void | |
2570 | Target_powerpc<size, big_endian>::Scan::check_non_pic(Relobj* object, | |
2571 | unsigned int r_type) | |
2572 | { | |
2573 | gold_assert(r_type != elfcpp::R_POWERPC_NONE); | |
2574 | ||
2575 | // These are the relocation types supported by glibc for both 32-bit | |
2576 | // and 64-bit powerpc. | |
2577 | switch (r_type) | |
2578 | { | |
3ea0a085 | 2579 | case elfcpp::R_POWERPC_NONE: |
42cacb20 DE |
2580 | case elfcpp::R_POWERPC_RELATIVE: |
2581 | case elfcpp::R_POWERPC_GLOB_DAT: | |
2582 | case elfcpp::R_POWERPC_DTPMOD: | |
2583 | case elfcpp::R_POWERPC_DTPREL: | |
2584 | case elfcpp::R_POWERPC_TPREL: | |
2585 | case elfcpp::R_POWERPC_JMP_SLOT: | |
2586 | case elfcpp::R_POWERPC_COPY: | |
3ea0a085 | 2587 | case elfcpp::R_POWERPC_IRELATIVE: |
42cacb20 | 2588 | case elfcpp::R_POWERPC_ADDR32: |
3ea0a085 | 2589 | case elfcpp::R_POWERPC_UADDR32: |
42cacb20 | 2590 | case elfcpp::R_POWERPC_ADDR24: |
3ea0a085 AM |
2591 | case elfcpp::R_POWERPC_ADDR16: |
2592 | case elfcpp::R_POWERPC_UADDR16: | |
2593 | case elfcpp::R_POWERPC_ADDR16_LO: | |
2594 | case elfcpp::R_POWERPC_ADDR16_HI: | |
2595 | case elfcpp::R_POWERPC_ADDR16_HA: | |
2596 | case elfcpp::R_POWERPC_ADDR14: | |
2597 | case elfcpp::R_POWERPC_ADDR14_BRTAKEN: | |
2598 | case elfcpp::R_POWERPC_ADDR14_BRNTAKEN: | |
2599 | case elfcpp::R_POWERPC_REL32: | |
42cacb20 | 2600 | case elfcpp::R_POWERPC_REL24: |
3ea0a085 AM |
2601 | case elfcpp::R_POWERPC_TPREL16: |
2602 | case elfcpp::R_POWERPC_TPREL16_LO: | |
2603 | case elfcpp::R_POWERPC_TPREL16_HI: | |
2604 | case elfcpp::R_POWERPC_TPREL16_HA: | |
42cacb20 DE |
2605 | return; |
2606 | ||
2607 | default: | |
2608 | break; | |
2609 | } | |
2610 | ||
2611 | if (size == 64) | |
2612 | { | |
2613 | switch (r_type) | |
2614 | { | |
2615 | // These are the relocation types supported only on 64-bit. | |
2616 | case elfcpp::R_PPC64_ADDR64: | |
42cacb20 | 2617 | case elfcpp::R_PPC64_UADDR64: |
3ea0a085 | 2618 | case elfcpp::R_PPC64_JMP_IREL: |
42cacb20 | 2619 | case elfcpp::R_PPC64_ADDR16_DS: |
3ea0a085 | 2620 | case elfcpp::R_PPC64_ADDR16_LO_DS: |
42cacb20 DE |
2621 | case elfcpp::R_PPC64_ADDR16_HIGHER: |
2622 | case elfcpp::R_PPC64_ADDR16_HIGHEST: | |
2623 | case elfcpp::R_PPC64_ADDR16_HIGHERA: | |
2624 | case elfcpp::R_PPC64_ADDR16_HIGHESTA: | |
42cacb20 | 2625 | case elfcpp::R_PPC64_REL64: |
3ea0a085 AM |
2626 | case elfcpp::R_POWERPC_ADDR30: |
2627 | case elfcpp::R_PPC64_TPREL16_DS: | |
2628 | case elfcpp::R_PPC64_TPREL16_LO_DS: | |
2629 | case elfcpp::R_PPC64_TPREL16_HIGHER: | |
2630 | case elfcpp::R_PPC64_TPREL16_HIGHEST: | |
2631 | case elfcpp::R_PPC64_TPREL16_HIGHERA: | |
2632 | case elfcpp::R_PPC64_TPREL16_HIGHESTA: | |
42cacb20 DE |
2633 | return; |
2634 | ||
2635 | default: | |
2636 | break; | |
2637 | } | |
2638 | } | |
2639 | else | |
2640 | { | |
2641 | switch (r_type) | |
2642 | { | |
2643 | // These are the relocation types supported only on 32-bit. | |
3ea0a085 AM |
2644 | // ??? glibc ld.so doesn't need to support these. |
2645 | case elfcpp::R_POWERPC_DTPREL16: | |
2646 | case elfcpp::R_POWERPC_DTPREL16_LO: | |
2647 | case elfcpp::R_POWERPC_DTPREL16_HI: | |
2648 | case elfcpp::R_POWERPC_DTPREL16_HA: | |
2649 | return; | |
42cacb20 DE |
2650 | |
2651 | default: | |
2652 | break; | |
2653 | } | |
2654 | } | |
2655 | ||
2656 | // This prevents us from issuing more than one error per reloc | |
2657 | // section. But we can still wind up issuing more than one | |
2658 | // error per object file. | |
2659 | if (this->issued_non_pic_error_) | |
2660 | return; | |
33aea2fd | 2661 | gold_assert(parameters->options().output_is_position_independent()); |
42cacb20 DE |
2662 | object->error(_("requires unsupported dynamic reloc; " |
2663 | "recompile with -fPIC")); | |
2664 | this->issued_non_pic_error_ = true; | |
2665 | return; | |
2666 | } | |
2667 | ||
e5d5f5ed AM |
2668 | // Return whether we need to make a PLT entry for a relocation of the |
2669 | // given type against a STT_GNU_IFUNC symbol. | |
2670 | ||
2671 | template<int size, bool big_endian> | |
2672 | bool | |
2673 | Target_powerpc<size, big_endian>::Scan::reloc_needs_plt_for_ifunc( | |
2674 | Sized_relobj_file<size, big_endian>* object, | |
2675 | unsigned int r_type) | |
2676 | { | |
2677 | switch (r_type) | |
2678 | { | |
2679 | // Word size refs from data sections are OK. | |
2680 | case elfcpp::R_POWERPC_ADDR32: | |
2681 | case elfcpp::R_POWERPC_UADDR32: | |
2682 | if (size == 32) | |
2683 | return true; | |
2684 | break; | |
2685 | ||
2686 | case elfcpp::R_PPC64_ADDR64: | |
2687 | case elfcpp::R_PPC64_UADDR64: | |
2688 | if (size == 64) | |
2689 | return true; | |
2690 | break; | |
2691 | ||
2692 | // GOT refs are good. | |
2693 | case elfcpp::R_POWERPC_GOT16: | |
2694 | case elfcpp::R_POWERPC_GOT16_LO: | |
2695 | case elfcpp::R_POWERPC_GOT16_HI: | |
2696 | case elfcpp::R_POWERPC_GOT16_HA: | |
2697 | case elfcpp::R_PPC64_GOT16_DS: | |
2698 | case elfcpp::R_PPC64_GOT16_LO_DS: | |
2699 | return true; | |
2700 | ||
2701 | // So are function calls. | |
2702 | case elfcpp::R_POWERPC_ADDR24: | |
2703 | case elfcpp::R_POWERPC_ADDR14: | |
2704 | case elfcpp::R_POWERPC_ADDR14_BRTAKEN: | |
2705 | case elfcpp::R_POWERPC_ADDR14_BRNTAKEN: | |
2706 | case elfcpp::R_POWERPC_REL24: | |
2707 | case elfcpp::R_PPC_PLTREL24: | |
2708 | case elfcpp::R_POWERPC_REL14: | |
2709 | case elfcpp::R_POWERPC_REL14_BRTAKEN: | |
2710 | case elfcpp::R_POWERPC_REL14_BRNTAKEN: | |
2711 | return true; | |
2712 | ||
2713 | default: | |
2714 | break; | |
2715 | } | |
2716 | ||
2717 | // Anything else is a problem. | |
2718 | // If we are building a static executable, the libc startup function | |
2719 | // responsible for applying indirect function relocations is going | |
2720 | // to complain about the reloc type. | |
2721 | // If we are building a dynamic executable, we will have a text | |
2722 | // relocation. The dynamic loader will set the text segment | |
2723 | // writable and non-executable to apply text relocations. So we'll | |
2724 | // segfault when trying to run the indirection function to resolve | |
2725 | // the reloc. | |
2726 | gold_error(_("%s: unsupported reloc %u for IFUNC symbol"), | |
2727 | object->name().c_str(), r_type); | |
2728 | return false; | |
2729 | } | |
2730 | ||
42cacb20 DE |
2731 | // Scan a relocation for a local symbol. |
2732 | ||
2733 | template<int size, bool big_endian> | |
2734 | inline void | |
2735 | Target_powerpc<size, big_endian>::Scan::local( | |
d83ce4e3 AM |
2736 | Symbol_table* symtab, |
2737 | Layout* layout, | |
2738 | Target_powerpc<size, big_endian>* target, | |
2739 | Sized_relobj_file<size, big_endian>* object, | |
2740 | unsigned int data_shndx, | |
2741 | Output_section* output_section, | |
2742 | const elfcpp::Rela<size, big_endian>& reloc, | |
2743 | unsigned int r_type, | |
e5d5f5ed | 2744 | const elfcpp::Sym<size, big_endian>& lsym, |
bfdfa4cd | 2745 | bool is_discarded) |
42cacb20 | 2746 | { |
dd93cd0a AM |
2747 | Powerpc_relobj<size, big_endian>* ppc_object |
2748 | = static_cast<Powerpc_relobj<size, big_endian>*>(object); | |
2749 | ||
bfdfa4cd AM |
2750 | if (is_discarded) |
2751 | { | |
2752 | if (size == 64 | |
2753 | && data_shndx == ppc_object->opd_shndx() | |
2754 | && r_type == elfcpp::R_PPC64_ADDR64) | |
2755 | ppc_object->set_opd_discard(reloc.get_r_offset()); | |
2756 | return; | |
2757 | } | |
2758 | ||
e5d5f5ed AM |
2759 | // A local STT_GNU_IFUNC symbol may require a PLT entry. |
2760 | bool is_ifunc = lsym.get_st_type() == elfcpp::STT_GNU_IFUNC; | |
2761 | if (is_ifunc && this->reloc_needs_plt_for_ifunc(object, r_type)) | |
2762 | target->make_local_ifunc_plt_entry(layout, symtab, reloc, object); | |
2763 | ||
42cacb20 DE |
2764 | switch (r_type) |
2765 | { | |
2766 | case elfcpp::R_POWERPC_NONE: | |
2767 | case elfcpp::R_POWERPC_GNU_VTINHERIT: | |
2768 | case elfcpp::R_POWERPC_GNU_VTENTRY: | |
6ce78956 | 2769 | case elfcpp::R_PPC64_TOCSAVE: |
dd93cd0a | 2770 | case elfcpp::R_PPC_EMB_MRKREF: |
7404fe1b | 2771 | case elfcpp::R_POWERPC_TLS: |
dd93cd0a AM |
2772 | break; |
2773 | ||
2774 | case elfcpp::R_PPC64_TOC: | |
2775 | { | |
2776 | Output_data_got_powerpc<size, big_endian>* got | |
2777 | = target->got_section(symtab, layout); | |
2778 | if (parameters->options().output_is_position_independent()) | |
2779 | { | |
bfdfa4cd AM |
2780 | Address off = reloc.get_r_offset(); |
2781 | if (size == 64 | |
2782 | && data_shndx == ppc_object->opd_shndx() | |
2783 | && ppc_object->get_opd_discard(off - 8)) | |
2784 | break; | |
2785 | ||
dd93cd0a | 2786 | Reloc_section* rela_dyn = target->rela_dyn_section(layout); |
bfdfa4cd | 2787 | Powerpc_relobj<size, big_endian>* symobj = ppc_object; |
dd93cd0a AM |
2788 | rela_dyn->add_output_section_relative(got->output_section(), |
2789 | elfcpp::R_POWERPC_RELATIVE, | |
2790 | output_section, | |
bfdfa4cd AM |
2791 | object, data_shndx, off, |
2792 | symobj->toc_base_offset()); | |
dd93cd0a AM |
2793 | } |
2794 | } | |
42cacb20 DE |
2795 | break; |
2796 | ||
2797 | case elfcpp::R_PPC64_ADDR64: | |
dd93cd0a | 2798 | case elfcpp::R_PPC64_UADDR64: |
42cacb20 | 2799 | case elfcpp::R_POWERPC_ADDR32: |
dd93cd0a AM |
2800 | case elfcpp::R_POWERPC_UADDR32: |
2801 | case elfcpp::R_POWERPC_ADDR24: | |
c9269dff | 2802 | case elfcpp::R_POWERPC_ADDR16: |
42cacb20 | 2803 | case elfcpp::R_POWERPC_ADDR16_LO: |
c9269dff AM |
2804 | case elfcpp::R_POWERPC_ADDR16_HI: |
2805 | case elfcpp::R_POWERPC_ADDR16_HA: | |
dd93cd0a AM |
2806 | case elfcpp::R_POWERPC_UADDR16: |
2807 | case elfcpp::R_PPC64_ADDR16_HIGHER: | |
2808 | case elfcpp::R_PPC64_ADDR16_HIGHERA: | |
2809 | case elfcpp::R_PPC64_ADDR16_HIGHEST: | |
2810 | case elfcpp::R_PPC64_ADDR16_HIGHESTA: | |
2811 | case elfcpp::R_PPC64_ADDR16_DS: | |
2812 | case elfcpp::R_PPC64_ADDR16_LO_DS: | |
2813 | case elfcpp::R_POWERPC_ADDR14: | |
2814 | case elfcpp::R_POWERPC_ADDR14_BRTAKEN: | |
2815 | case elfcpp::R_POWERPC_ADDR14_BRNTAKEN: | |
42cacb20 DE |
2816 | // If building a shared library (or a position-independent |
2817 | // executable), we need to create a dynamic relocation for | |
2818 | // this location. | |
2819 | if (parameters->options().output_is_position_independent()) | |
2e702c99 RM |
2820 | { |
2821 | Reloc_section* rela_dyn = target->rela_dyn_section(layout); | |
42cacb20 | 2822 | |
dd93cd0a AM |
2823 | if ((size == 32 && r_type == elfcpp::R_POWERPC_ADDR32) |
2824 | || (size == 64 && r_type == elfcpp::R_PPC64_ADDR64)) | |
2e702c99 RM |
2825 | { |
2826 | unsigned int r_sym = elfcpp::elf_r_sym<size>(reloc.get_r_info()); | |
e5d5f5ed AM |
2827 | unsigned int dynrel = elfcpp::R_POWERPC_RELATIVE; |
2828 | if (is_ifunc) | |
2829 | { | |
2830 | rela_dyn = target->iplt_section()->rel_plt(); | |
2831 | dynrel = elfcpp::R_POWERPC_IRELATIVE; | |
2832 | } | |
2833 | rela_dyn->add_local_relative(object, r_sym, dynrel, | |
dd93cd0a AM |
2834 | output_section, data_shndx, |
2835 | reloc.get_r_offset(), | |
e5d5f5ed | 2836 | reloc.get_r_addend(), is_ifunc); |
2e702c99 RM |
2837 | } |
2838 | else | |
2839 | { | |
dd93cd0a | 2840 | check_non_pic(object, r_type); |
42cacb20 | 2841 | unsigned int r_sym = elfcpp::elf_r_sym<size>(reloc.get_r_info()); |
dd93cd0a AM |
2842 | rela_dyn->add_local(object, r_sym, r_type, output_section, |
2843 | data_shndx, reloc.get_r_offset(), | |
2844 | reloc.get_r_addend()); | |
2e702c99 RM |
2845 | } |
2846 | } | |
42cacb20 DE |
2847 | break; |
2848 | ||
3ea0a085 | 2849 | case elfcpp::R_PPC64_REL64: |
dd93cd0a | 2850 | case elfcpp::R_POWERPC_REL32: |
42cacb20 DE |
2851 | case elfcpp::R_POWERPC_REL24: |
2852 | case elfcpp::R_PPC_LOCAL24PC: | |
dd93cd0a | 2853 | case elfcpp::R_POWERPC_REL16: |
6ce78956 | 2854 | case elfcpp::R_POWERPC_REL16_LO: |
dd93cd0a | 2855 | case elfcpp::R_POWERPC_REL16_HI: |
6ce78956 | 2856 | case elfcpp::R_POWERPC_REL16_HA: |
dd93cd0a AM |
2857 | case elfcpp::R_POWERPC_REL14: |
2858 | case elfcpp::R_POWERPC_REL14_BRTAKEN: | |
2859 | case elfcpp::R_POWERPC_REL14_BRNTAKEN: | |
2860 | case elfcpp::R_POWERPC_SECTOFF: | |
2861 | case elfcpp::R_POWERPC_TPREL16: | |
2862 | case elfcpp::R_POWERPC_DTPREL16: | |
2863 | case elfcpp::R_POWERPC_SECTOFF_LO: | |
2864 | case elfcpp::R_POWERPC_TPREL16_LO: | |
2865 | case elfcpp::R_POWERPC_DTPREL16_LO: | |
2866 | case elfcpp::R_POWERPC_SECTOFF_HI: | |
2867 | case elfcpp::R_POWERPC_TPREL16_HI: | |
2868 | case elfcpp::R_POWERPC_DTPREL16_HI: | |
2869 | case elfcpp::R_POWERPC_SECTOFF_HA: | |
2870 | case elfcpp::R_POWERPC_TPREL16_HA: | |
2871 | case elfcpp::R_POWERPC_DTPREL16_HA: | |
2872 | case elfcpp::R_PPC64_DTPREL16_HIGHER: | |
2873 | case elfcpp::R_PPC64_TPREL16_HIGHER: | |
2874 | case elfcpp::R_PPC64_DTPREL16_HIGHERA: | |
2875 | case elfcpp::R_PPC64_TPREL16_HIGHERA: | |
2876 | case elfcpp::R_PPC64_DTPREL16_HIGHEST: | |
2877 | case elfcpp::R_PPC64_TPREL16_HIGHEST: | |
2878 | case elfcpp::R_PPC64_DTPREL16_HIGHESTA: | |
2879 | case elfcpp::R_PPC64_TPREL16_HIGHESTA: | |
2880 | case elfcpp::R_PPC64_TPREL16_DS: | |
2881 | case elfcpp::R_PPC64_TPREL16_LO_DS: | |
2882 | case elfcpp::R_PPC64_DTPREL16_DS: | |
2883 | case elfcpp::R_PPC64_DTPREL16_LO_DS: | |
2884 | case elfcpp::R_PPC64_SECTOFF_DS: | |
2885 | case elfcpp::R_PPC64_SECTOFF_LO_DS: | |
2886 | case elfcpp::R_PPC64_TLSGD: | |
2887 | case elfcpp::R_PPC64_TLSLD: | |
42cacb20 DE |
2888 | break; |
2889 | ||
2890 | case elfcpp::R_POWERPC_GOT16: | |
2891 | case elfcpp::R_POWERPC_GOT16_LO: | |
2892 | case elfcpp::R_POWERPC_GOT16_HI: | |
2893 | case elfcpp::R_POWERPC_GOT16_HA: | |
dd93cd0a AM |
2894 | case elfcpp::R_PPC64_GOT16_DS: |
2895 | case elfcpp::R_PPC64_GOT16_LO_DS: | |
42cacb20 | 2896 | { |
c9269dff | 2897 | // The symbol requires a GOT entry. |
dd93cd0a AM |
2898 | Output_data_got_powerpc<size, big_endian>* got |
2899 | = target->got_section(symtab, layout); | |
2900 | unsigned int r_sym = elfcpp::elf_r_sym<size>(reloc.get_r_info()); | |
42cacb20 | 2901 | |
e5d5f5ed | 2902 | if (!parameters->options().output_is_position_independent()) |
42cacb20 | 2903 | { |
e5d5f5ed AM |
2904 | if (size == 32 && is_ifunc) |
2905 | got->add_local_plt(object, r_sym, GOT_TYPE_STANDARD); | |
2906 | else | |
2907 | got->add_local(object, r_sym, GOT_TYPE_STANDARD); | |
2908 | } | |
2909 | else if (!object->local_has_got_offset(r_sym, GOT_TYPE_STANDARD)) | |
2910 | { | |
2911 | // If we are generating a shared object or a pie, this | |
2912 | // symbol's GOT entry will be set by a dynamic relocation. | |
2913 | unsigned int off; | |
2914 | off = got->add_constant(0); | |
2915 | object->set_local_got_offset(r_sym, GOT_TYPE_STANDARD, off); | |
42cacb20 | 2916 | |
e5d5f5ed AM |
2917 | Reloc_section* rela_dyn = target->rela_dyn_section(layout); |
2918 | unsigned int dynrel = elfcpp::R_POWERPC_RELATIVE; | |
2919 | if (is_ifunc) | |
2920 | { | |
2921 | rela_dyn = target->iplt_section()->rel_plt(); | |
2922 | dynrel = elfcpp::R_POWERPC_IRELATIVE; | |
42cacb20 | 2923 | } |
e5d5f5ed AM |
2924 | rela_dyn->add_local_relative(object, r_sym, dynrel, |
2925 | got, off, 0, is_ifunc); | |
2e702c99 | 2926 | } |
42cacb20 DE |
2927 | } |
2928 | break; | |
2929 | ||
cf43a2fe AM |
2930 | case elfcpp::R_PPC64_TOC16: |
2931 | case elfcpp::R_PPC64_TOC16_LO: | |
2932 | case elfcpp::R_PPC64_TOC16_HI: | |
2933 | case elfcpp::R_PPC64_TOC16_HA: | |
2934 | case elfcpp::R_PPC64_TOC16_DS: | |
2935 | case elfcpp::R_PPC64_TOC16_LO_DS: | |
42cacb20 DE |
2936 | // We need a GOT section. |
2937 | target->got_section(symtab, layout); | |
2938 | break; | |
2939 | ||
dd93cd0a AM |
2940 | case elfcpp::R_POWERPC_GOT_TLSGD16: |
2941 | case elfcpp::R_POWERPC_GOT_TLSGD16_LO: | |
2942 | case elfcpp::R_POWERPC_GOT_TLSGD16_HI: | |
2943 | case elfcpp::R_POWERPC_GOT_TLSGD16_HA: | |
2944 | { | |
2945 | const tls::Tls_optimization tls_type = target->optimize_tls_gd(true); | |
2946 | if (tls_type == tls::TLSOPT_NONE) | |
2947 | { | |
2948 | Output_data_got_powerpc<size, big_endian>* got | |
2949 | = target->got_section(symtab, layout); | |
2950 | unsigned int r_sym = elfcpp::elf_r_sym<size>(reloc.get_r_info()); | |
bd73a62d AM |
2951 | Reloc_section* rela_dyn = target->rela_dyn_section(layout); |
2952 | got->add_local_tls_pair(object, r_sym, GOT_TYPE_TLSGD, | |
2953 | rela_dyn, elfcpp::R_POWERPC_DTPMOD); | |
dd93cd0a AM |
2954 | } |
2955 | else if (tls_type == tls::TLSOPT_TO_LE) | |
2956 | { | |
2957 | // no GOT relocs needed for Local Exec. | |
2958 | } | |
2959 | else | |
2960 | gold_unreachable(); | |
2961 | } | |
42cacb20 DE |
2962 | break; |
2963 | ||
dd93cd0a AM |
2964 | case elfcpp::R_POWERPC_GOT_TLSLD16: |
2965 | case elfcpp::R_POWERPC_GOT_TLSLD16_LO: | |
2966 | case elfcpp::R_POWERPC_GOT_TLSLD16_HI: | |
2967 | case elfcpp::R_POWERPC_GOT_TLSLD16_HA: | |
2968 | { | |
2969 | const tls::Tls_optimization tls_type = target->optimize_tls_ld(); | |
2970 | if (tls_type == tls::TLSOPT_NONE) | |
2971 | target->tlsld_got_offset(symtab, layout, object); | |
2972 | else if (tls_type == tls::TLSOPT_TO_LE) | |
2973 | { | |
2974 | // no GOT relocs needed for Local Exec. | |
7404fe1b AM |
2975 | if (parameters->options().emit_relocs()) |
2976 | { | |
2977 | Output_section* os = layout->tls_segment()->first_section(); | |
2978 | gold_assert(os != NULL); | |
2979 | os->set_needs_symtab_index(); | |
2980 | } | |
dd93cd0a AM |
2981 | } |
2982 | else | |
2983 | gold_unreachable(); | |
2984 | } | |
42cacb20 | 2985 | break; |
42cacb20 | 2986 | |
dd93cd0a AM |
2987 | case elfcpp::R_POWERPC_GOT_DTPREL16: |
2988 | case elfcpp::R_POWERPC_GOT_DTPREL16_LO: | |
2989 | case elfcpp::R_POWERPC_GOT_DTPREL16_HI: | |
2990 | case elfcpp::R_POWERPC_GOT_DTPREL16_HA: | |
2991 | { | |
2992 | Output_data_got_powerpc<size, big_endian>* got | |
2993 | = target->got_section(symtab, layout); | |
2994 | unsigned int r_sym = elfcpp::elf_r_sym<size>(reloc.get_r_info()); | |
bd73a62d | 2995 | got->add_local_tls(object, r_sym, GOT_TYPE_DTPREL); |
dd93cd0a AM |
2996 | } |
2997 | break; | |
42cacb20 | 2998 | |
dd93cd0a AM |
2999 | case elfcpp::R_POWERPC_GOT_TPREL16: |
3000 | case elfcpp::R_POWERPC_GOT_TPREL16_LO: | |
3001 | case elfcpp::R_POWERPC_GOT_TPREL16_HI: | |
3002 | case elfcpp::R_POWERPC_GOT_TPREL16_HA: | |
3003 | { | |
3004 | const tls::Tls_optimization tls_type = target->optimize_tls_ie(true); | |
3005 | if (tls_type == tls::TLSOPT_NONE) | |
3006 | { | |
3007 | Output_data_got_powerpc<size, big_endian>* got | |
3008 | = target->got_section(symtab, layout); | |
3009 | unsigned int r_sym = elfcpp::elf_r_sym<size>(reloc.get_r_info()); | |
bd73a62d | 3010 | got->add_local_tls(object, r_sym, GOT_TYPE_TPREL); |
dd93cd0a AM |
3011 | } |
3012 | else if (tls_type == tls::TLSOPT_TO_LE) | |
3013 | { | |
3014 | // no GOT relocs needed for Local Exec. | |
3015 | } | |
3016 | else | |
3017 | gold_unreachable(); | |
3018 | } | |
3019 | break; | |
3020 | ||
3021 | default: | |
3022 | unsupported_reloc_local(object, r_type); | |
3023 | break; | |
3024 | } | |
3025 | } | |
3026 | ||
3027 | // Report an unsupported relocation against a global symbol. | |
3028 | ||
3029 | template<int size, bool big_endian> | |
3030 | void | |
3031 | Target_powerpc<size, big_endian>::Scan::unsupported_reloc_global( | |
3032 | Sized_relobj_file<size, big_endian>* object, | |
3033 | unsigned int r_type, | |
3034 | Symbol* gsym) | |
3035 | { | |
42cacb20 DE |
3036 | gold_error(_("%s: unsupported reloc %u against global symbol %s"), |
3037 | object->name().c_str(), r_type, gsym->demangled_name().c_str()); | |
3038 | } | |
3039 | ||
3040 | // Scan a relocation for a global symbol. | |
3041 | ||
3042 | template<int size, bool big_endian> | |
3043 | inline void | |
3044 | Target_powerpc<size, big_endian>::Scan::global( | |
d83ce4e3 AM |
3045 | Symbol_table* symtab, |
3046 | Layout* layout, | |
3047 | Target_powerpc<size, big_endian>* target, | |
3048 | Sized_relobj_file<size, big_endian>* object, | |
3049 | unsigned int data_shndx, | |
3050 | Output_section* output_section, | |
3051 | const elfcpp::Rela<size, big_endian>& reloc, | |
3052 | unsigned int r_type, | |
3053 | Symbol* gsym) | |
42cacb20 | 3054 | { |
dd93cd0a AM |
3055 | Powerpc_relobj<size, big_endian>* ppc_object |
3056 | = static_cast<Powerpc_relobj<size, big_endian>*>(object); | |
3057 | ||
e5d5f5ed AM |
3058 | // A STT_GNU_IFUNC symbol may require a PLT entry. |
3059 | if (gsym->type() == elfcpp::STT_GNU_IFUNC | |
3060 | && this->reloc_needs_plt_for_ifunc(object, r_type)) | |
3061 | target->make_plt_entry(layout, symtab, gsym, reloc, object); | |
3062 | ||
42cacb20 DE |
3063 | switch (r_type) |
3064 | { | |
3065 | case elfcpp::R_POWERPC_NONE: | |
3066 | case elfcpp::R_POWERPC_GNU_VTINHERIT: | |
3067 | case elfcpp::R_POWERPC_GNU_VTENTRY: | |
cf43a2fe | 3068 | case elfcpp::R_PPC_LOCAL24PC: |
dd93cd0a | 3069 | case elfcpp::R_PPC_EMB_MRKREF: |
7404fe1b | 3070 | case elfcpp::R_POWERPC_TLS: |
dd93cd0a AM |
3071 | break; |
3072 | ||
3073 | case elfcpp::R_PPC64_TOC: | |
3074 | { | |
3075 | Output_data_got_powerpc<size, big_endian>* got | |
3076 | = target->got_section(symtab, layout); | |
3077 | if (parameters->options().output_is_position_independent()) | |
3078 | { | |
bfdfa4cd AM |
3079 | Address off = reloc.get_r_offset(); |
3080 | if (size == 64 | |
3081 | && data_shndx == ppc_object->opd_shndx() | |
3082 | && ppc_object->get_opd_discard(off - 8)) | |
3083 | break; | |
3084 | ||
dd93cd0a AM |
3085 | Reloc_section* rela_dyn = target->rela_dyn_section(layout); |
3086 | Powerpc_relobj<size, big_endian>* symobj = ppc_object; | |
3087 | if (data_shndx != ppc_object->opd_shndx()) | |
3088 | symobj = static_cast | |
3089 | <Powerpc_relobj<size, big_endian>*>(gsym->object()); | |
3090 | rela_dyn->add_output_section_relative(got->output_section(), | |
3091 | elfcpp::R_POWERPC_RELATIVE, | |
3092 | output_section, | |
bfdfa4cd | 3093 | object, data_shndx, off, |
dd93cd0a AM |
3094 | symobj->toc_base_offset()); |
3095 | } | |
3096 | } | |
42cacb20 DE |
3097 | break; |
3098 | ||
c9269dff | 3099 | case elfcpp::R_PPC64_ADDR64: |
bfdfa4cd AM |
3100 | if (size == 64 |
3101 | && data_shndx == ppc_object->opd_shndx() | |
3102 | && (gsym->is_defined_in_discarded_section() | |
3103 | || gsym->object() != object)) | |
3104 | { | |
3105 | ppc_object->set_opd_discard(reloc.get_r_offset()); | |
3106 | break; | |
3107 | } | |
3108 | // Fall thru | |
dd93cd0a | 3109 | case elfcpp::R_PPC64_UADDR64: |
c9269dff | 3110 | case elfcpp::R_POWERPC_ADDR32: |
dd93cd0a AM |
3111 | case elfcpp::R_POWERPC_UADDR32: |
3112 | case elfcpp::R_POWERPC_ADDR24: | |
42cacb20 DE |
3113 | case elfcpp::R_POWERPC_ADDR16: |
3114 | case elfcpp::R_POWERPC_ADDR16_LO: | |
3115 | case elfcpp::R_POWERPC_ADDR16_HI: | |
3116 | case elfcpp::R_POWERPC_ADDR16_HA: | |
dd93cd0a AM |
3117 | case elfcpp::R_POWERPC_UADDR16: |
3118 | case elfcpp::R_PPC64_ADDR16_HIGHER: | |
3119 | case elfcpp::R_PPC64_ADDR16_HIGHERA: | |
3120 | case elfcpp::R_PPC64_ADDR16_HIGHEST: | |
3121 | case elfcpp::R_PPC64_ADDR16_HIGHESTA: | |
3122 | case elfcpp::R_PPC64_ADDR16_DS: | |
3123 | case elfcpp::R_PPC64_ADDR16_LO_DS: | |
3124 | case elfcpp::R_POWERPC_ADDR14: | |
3125 | case elfcpp::R_POWERPC_ADDR14_BRTAKEN: | |
3126 | case elfcpp::R_POWERPC_ADDR14_BRNTAKEN: | |
42cacb20 | 3127 | { |
c9269dff AM |
3128 | // Make a PLT entry if necessary. |
3129 | if (gsym->needs_plt_entry()) | |
3130 | { | |
e5d5f5ed | 3131 | target->make_plt_entry(layout, symtab, gsym, reloc, 0); |
2e702c99 RM |
3132 | // Since this is not a PC-relative relocation, we may be |
3133 | // taking the address of a function. In that case we need to | |
3134 | // set the entry in the dynamic symbol table to the address of | |
e5d5f5ed | 3135 | // the PLT call stub. |
cf43a2fe | 3136 | if (size == 32 |
e5d5f5ed AM |
3137 | && gsym->is_from_dynobj() |
3138 | && !parameters->options().output_is_position_independent()) | |
2e702c99 | 3139 | gsym->set_needs_dynsym_value(); |
c9269dff AM |
3140 | } |
3141 | // Make a dynamic relocation if necessary. | |
dd93cd0a | 3142 | if (needs_dynamic_reloc<size>(gsym, Scan::get_reference_flags(r_type))) |
c9269dff AM |
3143 | { |
3144 | if (gsym->may_need_copy_reloc()) | |
3145 | { | |
3146 | target->copy_reloc(symtab, layout, object, | |
3147 | data_shndx, output_section, gsym, reloc); | |
3148 | } | |
dd93cd0a AM |
3149 | else if (((size == 32 && r_type == elfcpp::R_POWERPC_ADDR32) |
3150 | || (size == 64 && r_type == elfcpp::R_PPC64_ADDR64)) | |
3151 | && (gsym->can_use_relative_reloc(false) | |
e5d5f5ed AM |
3152 | || (size == 64 |
3153 | && data_shndx == ppc_object->opd_shndx()))) | |
2e702c99 RM |
3154 | { |
3155 | Reloc_section* rela_dyn = target->rela_dyn_section(layout); | |
e5d5f5ed AM |
3156 | unsigned int dynrel = elfcpp::R_POWERPC_RELATIVE; |
3157 | if (gsym->type() == elfcpp::STT_GNU_IFUNC) | |
3158 | { | |
3159 | rela_dyn = target->iplt_section()->rel_plt(); | |
3160 | dynrel = elfcpp::R_POWERPC_IRELATIVE; | |
3161 | } | |
3162 | rela_dyn->add_symbolless_global_addend( | |
3163 | gsym, dynrel, output_section, object, data_shndx, | |
3164 | reloc.get_r_offset(), reloc.get_r_addend()); | |
2e702c99 RM |
3165 | } |
3166 | else | |
3167 | { | |
3168 | Reloc_section* rela_dyn = target->rela_dyn_section(layout); | |
42cacb20 | 3169 | check_non_pic(object, r_type); |
dd93cd0a AM |
3170 | rela_dyn->add_global(gsym, r_type, output_section, |
3171 | object, data_shndx, | |
3172 | reloc.get_r_offset(), | |
3173 | reloc.get_r_addend()); | |
2e702c99 RM |
3174 | } |
3175 | } | |
42cacb20 DE |
3176 | } |
3177 | break; | |
3178 | ||
cf43a2fe | 3179 | case elfcpp::R_PPC_PLTREL24: |
42cacb20 | 3180 | case elfcpp::R_POWERPC_REL24: |
3ea0a085 AM |
3181 | if (gsym->needs_plt_entry() |
3182 | || (!gsym->final_value_is_known() | |
3183 | && (gsym->is_undefined() | |
3184 | || gsym->is_from_dynobj() | |
3185 | || gsym->is_preemptible()))) | |
e5d5f5ed | 3186 | target->make_plt_entry(layout, symtab, gsym, reloc, object); |
3ea0a085 | 3187 | // Fall thru |
42cacb20 | 3188 | |
3ea0a085 | 3189 | case elfcpp::R_PPC64_REL64: |
dd93cd0a | 3190 | case elfcpp::R_POWERPC_REL32: |
3ea0a085 AM |
3191 | // Make a dynamic relocation if necessary. |
3192 | if (needs_dynamic_reloc<size>(gsym, Scan::get_reference_flags(r_type))) | |
3193 | { | |
3194 | if (gsym->may_need_copy_reloc()) | |
3195 | { | |
3196 | target->copy_reloc(symtab, layout, object, | |
3197 | data_shndx, output_section, gsym, | |
3198 | reloc); | |
3199 | } | |
3200 | else | |
3201 | { | |
3202 | Reloc_section* rela_dyn = target->rela_dyn_section(layout); | |
3203 | check_non_pic(object, r_type); | |
3204 | rela_dyn->add_global(gsym, r_type, output_section, object, | |
3205 | data_shndx, reloc.get_r_offset(), | |
3206 | reloc.get_r_addend()); | |
3207 | } | |
3208 | } | |
3209 | break; | |
3210 | ||
6ce78956 AM |
3211 | case elfcpp::R_POWERPC_REL16: |
3212 | case elfcpp::R_POWERPC_REL16_LO: | |
3213 | case elfcpp::R_POWERPC_REL16_HI: | |
3214 | case elfcpp::R_POWERPC_REL16_HA: | |
dd93cd0a AM |
3215 | case elfcpp::R_POWERPC_REL14: |
3216 | case elfcpp::R_POWERPC_REL14_BRTAKEN: | |
3217 | case elfcpp::R_POWERPC_REL14_BRNTAKEN: | |
3218 | case elfcpp::R_POWERPC_SECTOFF: | |
3219 | case elfcpp::R_POWERPC_TPREL16: | |
3220 | case elfcpp::R_POWERPC_DTPREL16: | |
3221 | case elfcpp::R_POWERPC_SECTOFF_LO: | |
3222 | case elfcpp::R_POWERPC_TPREL16_LO: | |
3223 | case elfcpp::R_POWERPC_DTPREL16_LO: | |
3224 | case elfcpp::R_POWERPC_SECTOFF_HI: | |
3225 | case elfcpp::R_POWERPC_TPREL16_HI: | |
3226 | case elfcpp::R_POWERPC_DTPREL16_HI: | |
3227 | case elfcpp::R_POWERPC_SECTOFF_HA: | |
3228 | case elfcpp::R_POWERPC_TPREL16_HA: | |
3229 | case elfcpp::R_POWERPC_DTPREL16_HA: | |
3230 | case elfcpp::R_PPC64_DTPREL16_HIGHER: | |
3231 | case elfcpp::R_PPC64_TPREL16_HIGHER: | |
3232 | case elfcpp::R_PPC64_DTPREL16_HIGHERA: | |
3233 | case elfcpp::R_PPC64_TPREL16_HIGHERA: | |
3234 | case elfcpp::R_PPC64_DTPREL16_HIGHEST: | |
3235 | case elfcpp::R_PPC64_TPREL16_HIGHEST: | |
3236 | case elfcpp::R_PPC64_DTPREL16_HIGHESTA: | |
3237 | case elfcpp::R_PPC64_TPREL16_HIGHESTA: | |
3238 | case elfcpp::R_PPC64_TPREL16_DS: | |
3239 | case elfcpp::R_PPC64_TPREL16_LO_DS: | |
3240 | case elfcpp::R_PPC64_DTPREL16_DS: | |
3241 | case elfcpp::R_PPC64_DTPREL16_LO_DS: | |
3242 | case elfcpp::R_PPC64_SECTOFF_DS: | |
3243 | case elfcpp::R_PPC64_SECTOFF_LO_DS: | |
3244 | case elfcpp::R_PPC64_TLSGD: | |
3245 | case elfcpp::R_PPC64_TLSLD: | |
cf43a2fe AM |
3246 | break; |
3247 | ||
42cacb20 DE |
3248 | case elfcpp::R_POWERPC_GOT16: |
3249 | case elfcpp::R_POWERPC_GOT16_LO: | |
3250 | case elfcpp::R_POWERPC_GOT16_HI: | |
3251 | case elfcpp::R_POWERPC_GOT16_HA: | |
dd93cd0a AM |
3252 | case elfcpp::R_PPC64_GOT16_DS: |
3253 | case elfcpp::R_PPC64_GOT16_LO_DS: | |
42cacb20 | 3254 | { |
c9269dff AM |
3255 | // The symbol requires a GOT entry. |
3256 | Output_data_got_powerpc<size, big_endian>* got; | |
42cacb20 DE |
3257 | |
3258 | got = target->got_section(symtab, layout); | |
2e702c99 | 3259 | if (gsym->final_value_is_known()) |
2e702c99 | 3260 | { |
e5d5f5ed AM |
3261 | if (size == 32 && gsym->type() == elfcpp::STT_GNU_IFUNC) |
3262 | got->add_global_plt(gsym, GOT_TYPE_STANDARD); | |
3263 | else | |
3264 | got->add_global(gsym, GOT_TYPE_STANDARD); | |
3265 | } | |
3266 | else if (!gsym->has_got_offset(GOT_TYPE_STANDARD)) | |
3267 | { | |
3268 | // If we are generating a shared object or a pie, this | |
3269 | // symbol's GOT entry will be set by a dynamic relocation. | |
3270 | unsigned int off = got->add_constant(0); | |
3271 | gsym->set_got_offset(GOT_TYPE_STANDARD, off); | |
3272 | ||
2e702c99 | 3273 | Reloc_section* rela_dyn = target->rela_dyn_section(layout); |
e5d5f5ed AM |
3274 | if (gsym->can_use_relative_reloc(false) |
3275 | && !(size == 32 | |
3276 | && gsym->visibility() == elfcpp::STV_PROTECTED | |
3277 | && parameters->options().shared())) | |
2e702c99 | 3278 | { |
e5d5f5ed AM |
3279 | unsigned int dynrel = elfcpp::R_POWERPC_RELATIVE; |
3280 | if (gsym->type() == elfcpp::STT_GNU_IFUNC) | |
3281 | { | |
3282 | rela_dyn = target->iplt_section()->rel_plt(); | |
3283 | dynrel = elfcpp::R_POWERPC_IRELATIVE; | |
3284 | } | |
3285 | rela_dyn->add_global_relative(gsym, dynrel, got, off, 0, false); | |
3286 | } | |
3287 | else | |
3288 | { | |
3289 | unsigned int dynrel = elfcpp::R_POWERPC_GLOB_DAT; | |
3290 | rela_dyn->add_global(gsym, dynrel, got, off, 0); | |
42cacb20 | 3291 | } |
2e702c99 | 3292 | } |
42cacb20 DE |
3293 | } |
3294 | break; | |
3295 | ||
cf43a2fe AM |
3296 | case elfcpp::R_PPC64_TOC16: |
3297 | case elfcpp::R_PPC64_TOC16_LO: | |
3298 | case elfcpp::R_PPC64_TOC16_HI: | |
3299 | case elfcpp::R_PPC64_TOC16_HA: | |
3300 | case elfcpp::R_PPC64_TOC16_DS: | |
3301 | case elfcpp::R_PPC64_TOC16_LO_DS: | |
42cacb20 DE |
3302 | // We need a GOT section. |
3303 | target->got_section(symtab, layout); | |
3304 | break; | |
3305 | ||
dd93cd0a AM |
3306 | case elfcpp::R_POWERPC_GOT_TLSGD16: |
3307 | case elfcpp::R_POWERPC_GOT_TLSGD16_LO: | |
3308 | case elfcpp::R_POWERPC_GOT_TLSGD16_HI: | |
3309 | case elfcpp::R_POWERPC_GOT_TLSGD16_HA: | |
3310 | { | |
3311 | const bool final = gsym->final_value_is_known(); | |
3312 | const tls::Tls_optimization tls_type = target->optimize_tls_gd(final); | |
3313 | if (tls_type == tls::TLSOPT_NONE) | |
3314 | { | |
3315 | Output_data_got_powerpc<size, big_endian>* got | |
3316 | = target->got_section(symtab, layout); | |
3317 | got->add_global_pair_with_rel(gsym, GOT_TYPE_TLSGD, | |
3318 | target->rela_dyn_section(layout), | |
3319 | elfcpp::R_POWERPC_DTPMOD, | |
3320 | elfcpp::R_POWERPC_DTPREL); | |
3321 | } | |
3322 | else if (tls_type == tls::TLSOPT_TO_IE) | |
3323 | { | |
3324 | Output_data_got_powerpc<size, big_endian>* got | |
3325 | = target->got_section(symtab, layout); | |
3326 | got->add_global_with_rel(gsym, GOT_TYPE_TPREL, | |
3327 | target->rela_dyn_section(layout), | |
3328 | elfcpp::R_POWERPC_TPREL); | |
3329 | } | |
3330 | else if (tls_type == tls::TLSOPT_TO_LE) | |
3331 | { | |
3332 | // no GOT relocs needed for Local Exec. | |
3333 | } | |
3334 | else | |
3335 | gold_unreachable(); | |
3336 | } | |
42cacb20 DE |
3337 | break; |
3338 | ||
dd93cd0a AM |
3339 | case elfcpp::R_POWERPC_GOT_TLSLD16: |
3340 | case elfcpp::R_POWERPC_GOT_TLSLD16_LO: | |
3341 | case elfcpp::R_POWERPC_GOT_TLSLD16_HI: | |
3342 | case elfcpp::R_POWERPC_GOT_TLSLD16_HA: | |
3343 | { | |
3344 | const tls::Tls_optimization tls_type = target->optimize_tls_ld(); | |
3345 | if (tls_type == tls::TLSOPT_NONE) | |
3346 | target->tlsld_got_offset(symtab, layout, object); | |
3347 | else if (tls_type == tls::TLSOPT_TO_LE) | |
3348 | { | |
3349 | // no GOT relocs needed for Local Exec. | |
7404fe1b AM |
3350 | if (parameters->options().emit_relocs()) |
3351 | { | |
3352 | Output_section* os = layout->tls_segment()->first_section(); | |
3353 | gold_assert(os != NULL); | |
3354 | os->set_needs_symtab_index(); | |
3355 | } | |
dd93cd0a AM |
3356 | } |
3357 | else | |
3358 | gold_unreachable(); | |
3359 | } | |
3360 | break; | |
3361 | ||
3362 | case elfcpp::R_POWERPC_GOT_DTPREL16: | |
3363 | case elfcpp::R_POWERPC_GOT_DTPREL16_LO: | |
3364 | case elfcpp::R_POWERPC_GOT_DTPREL16_HI: | |
3365 | case elfcpp::R_POWERPC_GOT_DTPREL16_HA: | |
3366 | { | |
3367 | Output_data_got_powerpc<size, big_endian>* got | |
3368 | = target->got_section(symtab, layout); | |
bd73a62d AM |
3369 | if (!gsym->final_value_is_known() |
3370 | && (gsym->is_from_dynobj() | |
3371 | || gsym->is_undefined() | |
3372 | || gsym->is_preemptible())) | |
3373 | got->add_global_with_rel(gsym, GOT_TYPE_DTPREL, | |
3374 | target->rela_dyn_section(layout), | |
3375 | elfcpp::R_POWERPC_DTPREL); | |
3376 | else | |
3377 | got->add_global_tls(gsym, GOT_TYPE_DTPREL); | |
dd93cd0a AM |
3378 | } |
3379 | break; | |
3380 | ||
3381 | case elfcpp::R_POWERPC_GOT_TPREL16: | |
3382 | case elfcpp::R_POWERPC_GOT_TPREL16_LO: | |
3383 | case elfcpp::R_POWERPC_GOT_TPREL16_HI: | |
3384 | case elfcpp::R_POWERPC_GOT_TPREL16_HA: | |
3385 | { | |
3386 | const bool final = gsym->final_value_is_known(); | |
3387 | const tls::Tls_optimization tls_type = target->optimize_tls_ie(final); | |
3388 | if (tls_type == tls::TLSOPT_NONE) | |
3389 | { | |
3390 | Output_data_got_powerpc<size, big_endian>* got | |
3391 | = target->got_section(symtab, layout); | |
bd73a62d AM |
3392 | if (!gsym->final_value_is_known() |
3393 | && (gsym->is_from_dynobj() | |
3394 | || gsym->is_undefined() | |
3395 | || gsym->is_preemptible())) | |
3396 | got->add_global_with_rel(gsym, GOT_TYPE_TPREL, | |
3397 | target->rela_dyn_section(layout), | |
3398 | elfcpp::R_POWERPC_TPREL); | |
3399 | else | |
3400 | got->add_global_tls(gsym, GOT_TYPE_TPREL); | |
dd93cd0a AM |
3401 | } |
3402 | else if (tls_type == tls::TLSOPT_TO_LE) | |
3403 | { | |
3404 | // no GOT relocs needed for Local Exec. | |
3405 | } | |
3406 | else | |
3407 | gold_unreachable(); | |
3408 | } | |
42cacb20 DE |
3409 | break; |
3410 | ||
3411 | default: | |
3412 | unsupported_reloc_global(object, r_type, gsym); | |
3413 | break; | |
3414 | } | |
3415 | } | |
3416 | ||
6d03d481 ST |
3417 | // Process relocations for gc. |
3418 | ||
3419 | template<int size, bool big_endian> | |
3420 | void | |
3421 | Target_powerpc<size, big_endian>::gc_process_relocs( | |
d83ce4e3 AM |
3422 | Symbol_table* symtab, |
3423 | Layout* layout, | |
3424 | Sized_relobj_file<size, big_endian>* object, | |
3425 | unsigned int data_shndx, | |
3426 | unsigned int, | |
3427 | const unsigned char* prelocs, | |
3428 | size_t reloc_count, | |
3429 | Output_section* output_section, | |
3430 | bool needs_special_offset_handling, | |
3431 | size_t local_symbol_count, | |
3432 | const unsigned char* plocal_symbols) | |
6d03d481 ST |
3433 | { |
3434 | typedef Target_powerpc<size, big_endian> Powerpc; | |
2ea97941 | 3435 | typedef typename Target_powerpc<size, big_endian>::Scan Scan; |
e81fea4d AM |
3436 | Powerpc_relobj<size, big_endian>* ppc_object |
3437 | = static_cast<Powerpc_relobj<size, big_endian>*>(object); | |
3438 | if (size == 64) | |
3439 | ppc_object->set_opd_valid(); | |
3440 | if (size == 64 && data_shndx == ppc_object->opd_shndx()) | |
3441 | { | |
3442 | typename Powerpc_relobj<size, big_endian>::Access_from::iterator p; | |
3443 | for (p = ppc_object->access_from_map()->begin(); | |
3444 | p != ppc_object->access_from_map()->end(); | |
3445 | ++p) | |
3446 | { | |
3447 | Address dst_off = p->first; | |
3448 | unsigned int dst_indx = ppc_object->get_opd_ent(dst_off); | |
3449 | typename Powerpc_relobj<size, big_endian>::Section_refs::iterator s; | |
3450 | for (s = p->second.begin(); s != p->second.end(); ++s) | |
3451 | { | |
3452 | Object* src_obj = s->first; | |
3453 | unsigned int src_indx = s->second; | |
3454 | symtab->gc()->add_reference(src_obj, src_indx, | |
3455 | ppc_object, dst_indx); | |
3456 | } | |
3457 | p->second.clear(); | |
3458 | } | |
3459 | ppc_object->access_from_map()->clear(); | |
3460 | // Don't look at .opd relocs as .opd will reference everything. | |
3461 | return; | |
3462 | } | |
6d03d481 | 3463 | |
41cbeecc | 3464 | gold::gc_process_relocs<size, big_endian, Powerpc, elfcpp::SHT_RELA, Scan, |
3ff2ccb0 | 3465 | typename Target_powerpc::Relocatable_size_for_reloc>( |
6d03d481 ST |
3466 | symtab, |
3467 | layout, | |
3468 | this, | |
3469 | object, | |
3470 | data_shndx, | |
3471 | prelocs, | |
3472 | reloc_count, | |
3473 | output_section, | |
3474 | needs_special_offset_handling, | |
3475 | local_symbol_count, | |
3476 | plocal_symbols); | |
3477 | } | |
3478 | ||
e81fea4d AM |
3479 | // Handle target specific gc actions when adding a gc reference from |
3480 | // SRC_OBJ, SRC_SHNDX to a location specified by DST_OBJ, DST_SHNDX | |
3481 | // and DST_OFF. For powerpc64, this adds a referenc to the code | |
3482 | // section of a function descriptor. | |
3483 | ||
3484 | template<int size, bool big_endian> | |
3485 | void | |
3486 | Target_powerpc<size, big_endian>::do_gc_add_reference( | |
3487 | Symbol_table* symtab, | |
3488 | Object* src_obj, | |
3489 | unsigned int src_shndx, | |
3490 | Object* dst_obj, | |
3491 | unsigned int dst_shndx, | |
3492 | Address dst_off) const | |
3493 | { | |
3494 | Powerpc_relobj<size, big_endian>* ppc_object | |
3495 | = static_cast<Powerpc_relobj<size, big_endian>*>(dst_obj); | |
3496 | if (size == 64 && dst_shndx == ppc_object->opd_shndx()) | |
3497 | { | |
3498 | if (ppc_object->opd_valid()) | |
3499 | { | |
3500 | dst_shndx = ppc_object->get_opd_ent(dst_off); | |
3501 | symtab->gc()->add_reference(src_obj, src_shndx, dst_obj, dst_shndx); | |
3502 | } | |
3503 | else | |
3504 | { | |
3505 | // If we haven't run scan_opd_relocs, we must delay | |
3506 | // processing this function descriptor reference. | |
3507 | ppc_object->add_reference(src_obj, src_shndx, dst_off); | |
3508 | } | |
3509 | } | |
3510 | } | |
3511 | ||
3512 | // Add any special sections for this symbol to the gc work list. | |
3513 | // For powerpc64, this adds the code section of a function | |
3514 | // descriptor. | |
3515 | ||
3516 | template<int size, bool big_endian> | |
3517 | void | |
3518 | Target_powerpc<size, big_endian>::do_gc_mark_symbol( | |
3519 | Symbol_table* symtab, | |
3520 | Symbol* sym) const | |
3521 | { | |
3522 | if (size == 64) | |
3523 | { | |
3524 | Powerpc_relobj<size, big_endian>* ppc_object | |
3525 | = static_cast<Powerpc_relobj<size, big_endian>*>(sym->object()); | |
3526 | bool is_ordinary; | |
3527 | unsigned int shndx = sym->shndx(&is_ordinary); | |
3528 | if (is_ordinary && shndx == ppc_object->opd_shndx()) | |
3529 | { | |
3530 | Sized_symbol<size>* gsym = symtab->get_sized_symbol<size>(sym); | |
3531 | Address dst_off = gsym->value(); | |
3532 | unsigned int dst_indx = ppc_object->get_opd_ent(dst_off); | |
3533 | symtab->gc()->worklist().push(Section_id(ppc_object, dst_indx)); | |
3534 | } | |
3535 | } | |
3536 | } | |
3537 | ||
42cacb20 DE |
3538 | // Scan relocations for a section. |
3539 | ||
3540 | template<int size, bool big_endian> | |
3541 | void | |
3542 | Target_powerpc<size, big_endian>::scan_relocs( | |
d83ce4e3 AM |
3543 | Symbol_table* symtab, |
3544 | Layout* layout, | |
3545 | Sized_relobj_file<size, big_endian>* object, | |
3546 | unsigned int data_shndx, | |
3547 | unsigned int sh_type, | |
3548 | const unsigned char* prelocs, | |
3549 | size_t reloc_count, | |
3550 | Output_section* output_section, | |
3551 | bool needs_special_offset_handling, | |
3552 | size_t local_symbol_count, | |
3553 | const unsigned char* plocal_symbols) | |
42cacb20 DE |
3554 | { |
3555 | typedef Target_powerpc<size, big_endian> Powerpc; | |
2ea97941 | 3556 | typedef typename Target_powerpc<size, big_endian>::Scan Scan; |
42cacb20 DE |
3557 | |
3558 | if (sh_type == elfcpp::SHT_REL) | |
3559 | { | |
3560 | gold_error(_("%s: unsupported REL reloc section"), | |
3561 | object->name().c_str()); | |
3562 | return; | |
3563 | } | |
3564 | ||
cf43a2fe AM |
3565 | if (size == 32) |
3566 | { | |
3567 | static Output_data_space* sdata; | |
3568 | ||
3569 | // Define _SDA_BASE_ at the start of the .sdata section. | |
3570 | if (sdata == NULL) | |
3571 | { | |
3572 | // layout->find_output_section(".sdata") == NULL | |
3573 | sdata = new Output_data_space(4, "** sdata"); | |
3574 | Output_section* os | |
3575 | = layout->add_output_section_data(".sdata", 0, | |
3576 | elfcpp::SHF_ALLOC | |
3577 | | elfcpp::SHF_WRITE, | |
3578 | sdata, ORDER_SMALL_DATA, false); | |
3579 | symtab->define_in_output_data("_SDA_BASE_", NULL, | |
3580 | Symbol_table::PREDEFINED, | |
3581 | os, 32768, 0, elfcpp::STT_OBJECT, | |
3582 | elfcpp::STB_LOCAL, elfcpp::STV_HIDDEN, | |
3583 | 0, false, false); | |
3584 | } | |
3585 | } | |
42cacb20 | 3586 | |
2ea97941 | 3587 | gold::scan_relocs<size, big_endian, Powerpc, elfcpp::SHT_RELA, Scan>( |
42cacb20 DE |
3588 | symtab, |
3589 | layout, | |
3590 | this, | |
3591 | object, | |
3592 | data_shndx, | |
3593 | prelocs, | |
3594 | reloc_count, | |
3595 | output_section, | |
3596 | needs_special_offset_handling, | |
3597 | local_symbol_count, | |
3598 | plocal_symbols); | |
3599 | } | |
3600 | ||
ec4dbad3 AM |
3601 | // Functor class for processing the global symbol table. |
3602 | // Removes symbols defined on discarded opd entries. | |
3603 | ||
3604 | template<bool big_endian> | |
3605 | class Global_symbol_visitor_opd | |
3606 | { | |
3607 | public: | |
3608 | Global_symbol_visitor_opd() | |
3609 | { } | |
3610 | ||
3611 | void | |
3612 | operator()(Sized_symbol<64>* sym) | |
3613 | { | |
3614 | if (sym->has_symtab_index() | |
3615 | || sym->source() != Symbol::FROM_OBJECT | |
3616 | || !sym->in_real_elf()) | |
3617 | return; | |
3618 | ||
3619 | Powerpc_relobj<64, big_endian>* symobj | |
3620 | = static_cast<Powerpc_relobj<64, big_endian>*>(sym->object()); | |
3621 | if (symobj->is_dynamic() | |
3622 | || symobj->opd_shndx() == 0) | |
3623 | return; | |
3624 | ||
3625 | bool is_ordinary; | |
3626 | unsigned int shndx = sym->shndx(&is_ordinary); | |
3627 | if (shndx == symobj->opd_shndx() | |
3628 | && symobj->get_opd_discard(sym->value())) | |
3629 | sym->set_symtab_index(-1U); | |
3630 | } | |
3631 | }; | |
3632 | ||
42cacb20 DE |
3633 | // Finalize the sections. |
3634 | ||
3635 | template<int size, bool big_endian> | |
3636 | void | |
d5b40221 DK |
3637 | Target_powerpc<size, big_endian>::do_finalize_sections( |
3638 | Layout* layout, | |
f59f41f3 | 3639 | const Input_objects*, |
ec4dbad3 | 3640 | Symbol_table* symtab) |
42cacb20 | 3641 | { |
ec4dbad3 AM |
3642 | if (size == 64) |
3643 | { | |
3644 | typedef Global_symbol_visitor_opd<big_endian> Symbol_visitor; | |
3645 | symtab->for_all_symbols<64, Symbol_visitor>(Symbol_visitor()); | |
3646 | } | |
3647 | ||
42cacb20 | 3648 | // Fill in some more dynamic tags. |
ea715a34 ILT |
3649 | const Reloc_section* rel_plt = (this->plt_ == NULL |
3650 | ? NULL | |
3651 | : this->plt_->rel_plt()); | |
3652 | layout->add_target_dynamic_tags(false, this->plt_, rel_plt, | |
612a8d3d | 3653 | this->rela_dyn_, true, size == 32); |
42cacb20 | 3654 | |
c9269dff | 3655 | Output_data_dynamic* odyn = layout->dynamic_data(); |
cf43a2fe AM |
3656 | if (size == 32) |
3657 | { | |
dd93cd0a AM |
3658 | if (this->got_ != NULL) |
3659 | { | |
3660 | this->got_->finalize_data_size(); | |
3661 | odyn->add_section_plus_offset(elfcpp::DT_PPC_GOT, | |
3662 | this->got_, this->got_->g_o_t()); | |
3663 | } | |
cf43a2fe | 3664 | } |
c9269dff AM |
3665 | else |
3666 | { | |
dd93cd0a AM |
3667 | if (this->glink_ != NULL) |
3668 | { | |
3669 | this->glink_->finalize_data_size(); | |
3670 | odyn->add_section_plus_offset(elfcpp::DT_PPC64_GLINK, | |
3671 | this->glink_, | |
3672 | (this->glink_->pltresolve() | |
3673 | + this->glink_->pltresolve_size - 32)); | |
3674 | } | |
c9269dff | 3675 | } |
cf43a2fe | 3676 | |
42cacb20 DE |
3677 | // Emit any relocs we saved in an attempt to avoid generating COPY |
3678 | // relocs. | |
3679 | if (this->copy_relocs_.any_saved_relocs()) | |
3680 | this->copy_relocs_.emit(this->rela_dyn_section(layout)); | |
3681 | } | |
3682 | ||
3ea0a085 AM |
3683 | // Return the value to use for a branch relocation. |
3684 | ||
3685 | template<int size, bool big_endian> | |
3686 | typename elfcpp::Elf_types<size>::Elf_Addr | |
3687 | Target_powerpc<size, big_endian>::symval_for_branch( | |
3688 | Address value, | |
3689 | const Sized_symbol<size>* gsym, | |
3690 | Powerpc_relobj<size, big_endian>* object, | |
3691 | unsigned int *dest_shndx) | |
3692 | { | |
3693 | *dest_shndx = 0; | |
3694 | if (size == 32) | |
3695 | return value; | |
3696 | ||
3697 | // If the symbol is defined in an opd section, ie. is a function | |
3698 | // descriptor, use the function descriptor code entry address | |
3699 | Powerpc_relobj<size, big_endian>* symobj = object; | |
3700 | if (gsym != NULL) | |
3701 | symobj = static_cast<Powerpc_relobj<size, big_endian>*>(gsym->object()); | |
3702 | unsigned int shndx = symobj->opd_shndx(); | |
3703 | if (shndx == 0) | |
3704 | return value; | |
3705 | Address opd_addr = symobj->get_output_section_offset(shndx); | |
3706 | gold_assert(opd_addr != invalid_address); | |
3707 | opd_addr += symobj->output_section(shndx)->address(); | |
3708 | if (value >= opd_addr && value < opd_addr + symobj->section_size(shndx)) | |
3709 | { | |
3710 | Address sec_off; | |
e81fea4d | 3711 | *dest_shndx = symobj->get_opd_ent(value - opd_addr, &sec_off); |
3ea0a085 AM |
3712 | Address sec_addr = symobj->get_output_section_offset(*dest_shndx); |
3713 | gold_assert(sec_addr != invalid_address); | |
3714 | sec_addr += symobj->output_section(*dest_shndx)->address(); | |
3715 | value = sec_addr + sec_off; | |
3716 | } | |
3717 | return value; | |
3718 | } | |
3719 | ||
42cacb20 DE |
3720 | // Perform a relocation. |
3721 | ||
3722 | template<int size, bool big_endian> | |
3723 | inline bool | |
3724 | Target_powerpc<size, big_endian>::Relocate::relocate( | |
d83ce4e3 AM |
3725 | const Relocate_info<size, big_endian>* relinfo, |
3726 | Target_powerpc* target, | |
3727 | Output_section* os, | |
3728 | size_t relnum, | |
3729 | const elfcpp::Rela<size, big_endian>& rela, | |
3730 | unsigned int r_type, | |
3731 | const Sized_symbol<size>* gsym, | |
3732 | const Symbol_value<size>* psymval, | |
3733 | unsigned char* view, | |
c9269dff AM |
3734 | Address address, |
3735 | section_size_type view_size) | |
42cacb20 | 3736 | { |
dd93cd0a AM |
3737 | |
3738 | bool is_tls_call = ((r_type == elfcpp::R_POWERPC_REL24 | |
3739 | || r_type == elfcpp::R_PPC_PLTREL24) | |
3740 | && gsym != NULL | |
3741 | && strcmp(gsym->name(), "__tls_get_addr") == 0); | |
3742 | enum skip_tls last_tls = this->call_tls_get_addr_; | |
3743 | this->call_tls_get_addr_ = CALL_NOT_EXPECTED; | |
3744 | if (is_tls_call) | |
3745 | { | |
3746 | if (last_tls == CALL_NOT_EXPECTED) | |
3747 | gold_error_at_location(relinfo, relnum, rela.get_r_offset(), | |
3748 | _("__tls_get_addr call lacks marker reloc")); | |
3749 | else if (last_tls == CALL_SKIP) | |
3750 | return false; | |
3751 | } | |
3752 | else if (last_tls != CALL_NOT_EXPECTED) | |
3753 | gold_error_at_location(relinfo, relnum, rela.get_r_offset(), | |
3754 | _("missing expected __tls_get_addr call")); | |
3755 | ||
42cacb20 | 3756 | typedef Powerpc_relocate_functions<size, big_endian> Reloc; |
dd93cd0a | 3757 | typedef typename elfcpp::Swap<32, big_endian>::Valtype Insn; |
3ea0a085 AM |
3758 | Powerpc_relobj<size, big_endian>* const object |
3759 | = static_cast<Powerpc_relobj<size, big_endian>*>(relinfo->object); | |
dd93cd0a AM |
3760 | Address value = 0; |
3761 | bool has_plt_value = false; | |
e5d5f5ed | 3762 | unsigned int r_sym = elfcpp::elf_r_sym<size>(rela.get_r_info()); |
dd93cd0a | 3763 | if (gsym != NULL |
e5d5f5ed AM |
3764 | ? use_plt_offset<size>(gsym, Scan::get_reference_flags(r_type)) |
3765 | : object->local_has_plt_offset(r_sym)) | |
dd93cd0a AM |
3766 | { |
3767 | const Output_data_glink<size, big_endian>* glink | |
3768 | = target->glink_section(); | |
3769 | unsigned int glink_index = glink->find_entry(gsym, rela, object); | |
3770 | value = glink->address() + glink_index * glink->glink_entry_size(); | |
3771 | has_plt_value = true; | |
3772 | } | |
cf43a2fe AM |
3773 | |
3774 | if (r_type == elfcpp::R_POWERPC_GOT16 | |
3775 | || r_type == elfcpp::R_POWERPC_GOT16_LO | |
3776 | || r_type == elfcpp::R_POWERPC_GOT16_HI | |
3777 | || r_type == elfcpp::R_POWERPC_GOT16_HA | |
3778 | || r_type == elfcpp::R_PPC64_GOT16_DS | |
3779 | || r_type == elfcpp::R_PPC64_GOT16_LO_DS) | |
42cacb20 | 3780 | { |
cf43a2fe AM |
3781 | if (gsym != NULL) |
3782 | { | |
3783 | gold_assert(gsym->has_got_offset(GOT_TYPE_STANDARD)); | |
3784 | value = gsym->got_offset(GOT_TYPE_STANDARD); | |
3785 | } | |
3786 | else | |
3787 | { | |
3788 | unsigned int r_sym = elfcpp::elf_r_sym<size>(rela.get_r_info()); | |
3789 | gold_assert(object->local_has_got_offset(r_sym, GOT_TYPE_STANDARD)); | |
3790 | value = object->local_got_offset(r_sym, GOT_TYPE_STANDARD); | |
3791 | } | |
dd93cd0a | 3792 | value -= target->got_section()->got_base_offset(object); |
cf43a2fe AM |
3793 | } |
3794 | else if (r_type == elfcpp::R_PPC64_TOC) | |
3795 | { | |
c9269dff | 3796 | value = (target->got_section()->output_section()->address() |
dd93cd0a | 3797 | + object->toc_base_offset()); |
cf43a2fe AM |
3798 | } |
3799 | else if (gsym != NULL | |
3800 | && (r_type == elfcpp::R_POWERPC_REL24 | |
3801 | || r_type == elfcpp::R_PPC_PLTREL24) | |
dd93cd0a | 3802 | && has_plt_value) |
cf43a2fe | 3803 | { |
c9269dff AM |
3804 | if (size == 64) |
3805 | { | |
3806 | typedef typename elfcpp::Swap<32, big_endian>::Valtype Valtype; | |
3807 | Valtype* wv = reinterpret_cast<Valtype*>(view); | |
3808 | bool can_plt_call = false; | |
3809 | if (rela.get_r_offset() + 8 <= view_size) | |
3810 | { | |
3ea0a085 | 3811 | Valtype insn = elfcpp::Swap<32, big_endian>::readval(wv); |
c9269dff | 3812 | Valtype insn2 = elfcpp::Swap<32, big_endian>::readval(wv + 1); |
3ea0a085 AM |
3813 | if ((insn & 1) != 0 |
3814 | && (insn2 == nop | |
3815 | || insn2 == cror_15_15_15 || insn2 == cror_31_31_31)) | |
c9269dff AM |
3816 | { |
3817 | elfcpp::Swap<32, big_endian>::writeval(wv + 1, ld_2_1 + 40); | |
3818 | can_plt_call = true; | |
3819 | } | |
3820 | } | |
3821 | if (!can_plt_call) | |
3ea0a085 AM |
3822 | { |
3823 | // If we don't have a branch and link followed by a nop, | |
3824 | // we can't go via the plt because there is no place to | |
3825 | // put a toc restoring instruction. | |
3826 | // Unless we know we won't be returning. | |
3827 | if (strcmp(gsym->name(), "__libc_start_main") == 0) | |
3828 | can_plt_call = true; | |
3829 | } | |
3830 | if (!can_plt_call) | |
3831 | { | |
3832 | // This is not an error in one special case: A self | |
3833 | // call. It isn't possible to cheaply verify we have | |
3834 | // such a call so just check for a call to the same | |
3835 | // section. | |
3836 | bool ok = false; | |
3837 | if (gsym->source() == Symbol::FROM_OBJECT | |
3838 | && gsym->object() == object) | |
3839 | { | |
3840 | Address addend = rela.get_r_addend(); | |
3841 | unsigned int dest_shndx; | |
3842 | value = psymval->value(object, addend); | |
3843 | value = target->symval_for_branch(value, gsym, object, | |
3844 | &dest_shndx); | |
3845 | bool is_ordinary; | |
3846 | if (dest_shndx == 0) | |
3847 | dest_shndx = gsym->shndx(&is_ordinary); | |
3848 | ok = dest_shndx == relinfo->data_shndx; | |
3849 | } | |
3850 | if (!ok) | |
3851 | gold_error_at_location(relinfo, relnum, rela.get_r_offset(), | |
3852 | _("call lacks nop, can't restore toc; " | |
3853 | "recompile with -fPIC")); | |
3854 | } | |
c9269dff | 3855 | } |
cf43a2fe | 3856 | } |
dd93cd0a AM |
3857 | else if (r_type == elfcpp::R_POWERPC_GOT_TLSGD16 |
3858 | || r_type == elfcpp::R_POWERPC_GOT_TLSGD16_LO | |
3859 | || r_type == elfcpp::R_POWERPC_GOT_TLSGD16_HI | |
3860 | || r_type == elfcpp::R_POWERPC_GOT_TLSGD16_HA) | |
3861 | { | |
3862 | // First instruction of a global dynamic sequence, arg setup insn. | |
3863 | const bool final = gsym == NULL || gsym->final_value_is_known(); | |
3864 | const tls::Tls_optimization tls_type = target->optimize_tls_gd(final); | |
3865 | enum Got_type got_type = GOT_TYPE_STANDARD; | |
3866 | if (tls_type == tls::TLSOPT_NONE) | |
3867 | got_type = GOT_TYPE_TLSGD; | |
3868 | else if (tls_type == tls::TLSOPT_TO_IE) | |
3869 | got_type = GOT_TYPE_TPREL; | |
3870 | if (got_type != GOT_TYPE_STANDARD) | |
3871 | { | |
3872 | if (gsym != NULL) | |
3873 | { | |
3874 | gold_assert(gsym->has_got_offset(got_type)); | |
3875 | value = gsym->got_offset(got_type); | |
3876 | } | |
3877 | else | |
3878 | { | |
3879 | unsigned int r_sym = elfcpp::elf_r_sym<size>(rela.get_r_info()); | |
3880 | gold_assert(object->local_has_got_offset(r_sym, got_type)); | |
3881 | value = object->local_got_offset(r_sym, got_type); | |
3882 | } | |
3883 | value -= target->got_section()->got_base_offset(object); | |
3884 | } | |
3885 | if (tls_type == tls::TLSOPT_TO_IE) | |
3886 | { | |
3887 | if (r_type == elfcpp::R_POWERPC_GOT_TLSGD16 | |
3888 | || r_type == elfcpp::R_POWERPC_GOT_TLSGD16_LO) | |
3889 | { | |
3890 | Insn* iview = reinterpret_cast<Insn*>(view - 2 * big_endian); | |
3891 | Insn insn = elfcpp::Swap<32, big_endian>::readval(iview); | |
3892 | insn &= (1 << 26) - (1 << 16); // extract rt,ra from addi | |
3893 | if (size == 32) | |
3894 | insn |= 32 << 26; // lwz | |
3895 | else | |
3896 | insn |= 58 << 26; // ld | |
3897 | elfcpp::Swap<32, big_endian>::writeval(iview, insn); | |
3898 | } | |
3899 | r_type += (elfcpp::R_POWERPC_GOT_TPREL16 | |
3900 | - elfcpp::R_POWERPC_GOT_TLSGD16); | |
3901 | } | |
3902 | else if (tls_type == tls::TLSOPT_TO_LE) | |
3903 | { | |
3904 | if (r_type == elfcpp::R_POWERPC_GOT_TLSGD16 | |
3905 | || r_type == elfcpp::R_POWERPC_GOT_TLSGD16_LO) | |
3906 | { | |
3907 | Insn* iview = reinterpret_cast<Insn*>(view - 2 * big_endian); | |
3908 | Insn insn = addis_3_13; | |
3909 | if (size == 32) | |
3910 | insn = addis_3_2; | |
3911 | elfcpp::Swap<32, big_endian>::writeval(iview, insn); | |
3912 | r_type = elfcpp::R_POWERPC_TPREL16_HA; | |
3913 | value = psymval->value(object, rela.get_r_addend()); | |
3914 | } | |
3915 | else | |
3916 | { | |
3917 | Insn* iview = reinterpret_cast<Insn*>(view - 2 * big_endian); | |
3918 | Insn insn = nop; | |
3919 | elfcpp::Swap<32, big_endian>::writeval(iview, insn); | |
3920 | r_type = elfcpp::R_POWERPC_NONE; | |
3921 | } | |
3922 | } | |
3923 | } | |
3924 | else if (r_type == elfcpp::R_POWERPC_GOT_TLSLD16 | |
3925 | || r_type == elfcpp::R_POWERPC_GOT_TLSLD16_LO | |
3926 | || r_type == elfcpp::R_POWERPC_GOT_TLSLD16_HI | |
3927 | || r_type == elfcpp::R_POWERPC_GOT_TLSLD16_HA) | |
3928 | { | |
3929 | // First instruction of a local dynamic sequence, arg setup insn. | |
3930 | const tls::Tls_optimization tls_type = target->optimize_tls_ld(); | |
3931 | if (tls_type == tls::TLSOPT_NONE) | |
3932 | { | |
3933 | value = target->tlsld_got_offset(); | |
3934 | value -= target->got_section()->got_base_offset(object); | |
3935 | } | |
3936 | else | |
3937 | { | |
3938 | gold_assert(tls_type == tls::TLSOPT_TO_LE); | |
3939 | if (r_type == elfcpp::R_POWERPC_GOT_TLSLD16 | |
3940 | || r_type == elfcpp::R_POWERPC_GOT_TLSLD16_LO) | |
3941 | { | |
3942 | Insn* iview = reinterpret_cast<Insn*>(view - 2 * big_endian); | |
3943 | Insn insn = addis_3_13; | |
3944 | if (size == 32) | |
3945 | insn = addis_3_2; | |
3946 | elfcpp::Swap<32, big_endian>::writeval(iview, insn); | |
3947 | r_type = elfcpp::R_POWERPC_TPREL16_HA; | |
7404fe1b | 3948 | value = dtp_offset; |
dd93cd0a AM |
3949 | } |
3950 | else | |
3951 | { | |
3952 | Insn* iview = reinterpret_cast<Insn*>(view - 2 * big_endian); | |
3953 | Insn insn = nop; | |
3954 | elfcpp::Swap<32, big_endian>::writeval(iview, insn); | |
3955 | r_type = elfcpp::R_POWERPC_NONE; | |
3956 | } | |
3957 | } | |
3958 | } | |
3959 | else if (r_type == elfcpp::R_POWERPC_GOT_DTPREL16 | |
3960 | || r_type == elfcpp::R_POWERPC_GOT_DTPREL16_LO | |
3961 | || r_type == elfcpp::R_POWERPC_GOT_DTPREL16_HI | |
3962 | || r_type == elfcpp::R_POWERPC_GOT_DTPREL16_HA) | |
3963 | { | |
3964 | // Accesses relative to a local dynamic sequence address, | |
3965 | // no optimisation here. | |
3966 | if (gsym != NULL) | |
3967 | { | |
3968 | gold_assert(gsym->has_got_offset(GOT_TYPE_DTPREL)); | |
3969 | value = gsym->got_offset(GOT_TYPE_DTPREL); | |
3970 | } | |
3971 | else | |
3972 | { | |
3973 | unsigned int r_sym = elfcpp::elf_r_sym<size>(rela.get_r_info()); | |
3974 | gold_assert(object->local_has_got_offset(r_sym, GOT_TYPE_DTPREL)); | |
3975 | value = object->local_got_offset(r_sym, GOT_TYPE_DTPREL); | |
3976 | } | |
3977 | value -= target->got_section()->got_base_offset(object); | |
3978 | } | |
3979 | else if (r_type == elfcpp::R_POWERPC_GOT_TPREL16 | |
3980 | || r_type == elfcpp::R_POWERPC_GOT_TPREL16_LO | |
3981 | || r_type == elfcpp::R_POWERPC_GOT_TPREL16_HI | |
3982 | || r_type == elfcpp::R_POWERPC_GOT_TPREL16_HA) | |
3983 | { | |
3984 | // First instruction of initial exec sequence. | |
3985 | const bool final = gsym == NULL || gsym->final_value_is_known(); | |
3986 | const tls::Tls_optimization tls_type = target->optimize_tls_ie(final); | |
3987 | if (tls_type == tls::TLSOPT_NONE) | |
3988 | { | |
3989 | if (gsym != NULL) | |
3990 | { | |
3991 | gold_assert(gsym->has_got_offset(GOT_TYPE_TPREL)); | |
3992 | value = gsym->got_offset(GOT_TYPE_TPREL); | |
3993 | } | |
3994 | else | |
3995 | { | |
3996 | unsigned int r_sym = elfcpp::elf_r_sym<size>(rela.get_r_info()); | |
3997 | gold_assert(object->local_has_got_offset(r_sym, GOT_TYPE_TPREL)); | |
3998 | value = object->local_got_offset(r_sym, GOT_TYPE_TPREL); | |
3999 | } | |
4000 | value -= target->got_section()->got_base_offset(object); | |
4001 | } | |
4002 | else | |
4003 | { | |
4004 | gold_assert(tls_type == tls::TLSOPT_TO_LE); | |
4005 | if (r_type == elfcpp::R_POWERPC_GOT_TPREL16 | |
4006 | || r_type == elfcpp::R_POWERPC_GOT_TPREL16_LO) | |
4007 | { | |
4008 | Insn* iview = reinterpret_cast<Insn*>(view - 2 * big_endian); | |
4009 | Insn insn = elfcpp::Swap<32, big_endian>::readval(iview); | |
4010 | insn &= (1 << 26) - (1 << 21); // extract rt from ld | |
4011 | if (size == 32) | |
4012 | insn |= addis_0_2; | |
4013 | else | |
4014 | insn |= addis_0_13; | |
4015 | elfcpp::Swap<32, big_endian>::writeval(iview, insn); | |
4016 | r_type = elfcpp::R_POWERPC_TPREL16_HA; | |
4017 | value = psymval->value(object, rela.get_r_addend()); | |
4018 | } | |
4019 | else | |
4020 | { | |
4021 | Insn* iview = reinterpret_cast<Insn*>(view - 2 * big_endian); | |
4022 | Insn insn = nop; | |
4023 | elfcpp::Swap<32, big_endian>::writeval(iview, insn); | |
4024 | r_type = elfcpp::R_POWERPC_NONE; | |
4025 | } | |
4026 | } | |
4027 | } | |
4028 | else if ((size == 64 && r_type == elfcpp::R_PPC64_TLSGD) | |
4029 | || (size == 32 && r_type == elfcpp::R_PPC_TLSGD)) | |
4030 | { | |
4031 | // Second instruction of a global dynamic sequence, | |
4032 | // the __tls_get_addr call | |
4033 | this->call_tls_get_addr_ = CALL_EXPECTED; | |
4034 | const bool final = gsym == NULL || gsym->final_value_is_known(); | |
4035 | const tls::Tls_optimization tls_type = target->optimize_tls_gd(final); | |
4036 | if (tls_type != tls::TLSOPT_NONE) | |
4037 | { | |
4038 | if (tls_type == tls::TLSOPT_TO_IE) | |
4039 | { | |
4040 | Insn* iview = reinterpret_cast<Insn*>(view); | |
4041 | Insn insn = add_3_3_13; | |
4042 | if (size == 32) | |
4043 | insn = add_3_3_2; | |
4044 | elfcpp::Swap<32, big_endian>::writeval(iview, insn); | |
4045 | r_type = elfcpp::R_POWERPC_NONE; | |
4046 | } | |
4047 | else | |
4048 | { | |
4049 | Insn* iview = reinterpret_cast<Insn*>(view); | |
4050 | Insn insn = addi_3_3; | |
4051 | elfcpp::Swap<32, big_endian>::writeval(iview, insn); | |
4052 | r_type = elfcpp::R_POWERPC_TPREL16_LO; | |
4053 | view += 2 * big_endian; | |
4054 | value = psymval->value(object, rela.get_r_addend()); | |
4055 | } | |
4056 | this->call_tls_get_addr_ = CALL_SKIP; | |
4057 | } | |
4058 | } | |
4059 | else if ((size == 64 && r_type == elfcpp::R_PPC64_TLSLD) | |
4060 | || (size == 32 && r_type == elfcpp::R_PPC_TLSLD)) | |
4061 | { | |
4062 | // Second instruction of a local dynamic sequence, | |
4063 | // the __tls_get_addr call | |
4064 | this->call_tls_get_addr_ = CALL_EXPECTED; | |
4065 | const tls::Tls_optimization tls_type = target->optimize_tls_ld(); | |
4066 | if (tls_type == tls::TLSOPT_TO_LE) | |
4067 | { | |
4068 | Insn* iview = reinterpret_cast<Insn*>(view); | |
4069 | Insn insn = addi_3_3; | |
4070 | elfcpp::Swap<32, big_endian>::writeval(iview, insn); | |
4071 | this->call_tls_get_addr_ = CALL_SKIP; | |
4072 | r_type = elfcpp::R_POWERPC_TPREL16_LO; | |
4073 | view += 2 * big_endian; | |
7404fe1b | 4074 | value = dtp_offset; |
dd93cd0a AM |
4075 | } |
4076 | } | |
4077 | else if (r_type == elfcpp::R_POWERPC_TLS) | |
4078 | { | |
4079 | // Second instruction of an initial exec sequence | |
4080 | const bool final = gsym == NULL || gsym->final_value_is_known(); | |
4081 | const tls::Tls_optimization tls_type = target->optimize_tls_ie(final); | |
4082 | if (tls_type == tls::TLSOPT_TO_LE) | |
4083 | { | |
4084 | Insn* iview = reinterpret_cast<Insn*>(view); | |
4085 | Insn insn = elfcpp::Swap<32, big_endian>::readval(iview); | |
4086 | unsigned int reg = size == 32 ? 2 : 13; | |
4087 | insn = at_tls_transform(insn, reg); | |
4088 | gold_assert(insn != 0); | |
4089 | elfcpp::Swap<32, big_endian>::writeval(iview, insn); | |
4090 | r_type = elfcpp::R_POWERPC_TPREL16_LO; | |
4091 | view += 2 * big_endian; | |
4092 | value = psymval->value(object, rela.get_r_addend()); | |
4093 | } | |
4094 | } | |
cf43a2fe AM |
4095 | else |
4096 | { | |
dd93cd0a | 4097 | Address addend = 0; |
3ea0a085 | 4098 | unsigned int dest_shndx; |
cf43a2fe AM |
4099 | if (r_type != elfcpp::R_PPC_PLTREL24) |
4100 | addend = rela.get_r_addend(); | |
dd93cd0a AM |
4101 | if (size == 64 || !has_plt_value) |
4102 | value = psymval->value(object, addend); | |
4103 | if (size == 64 && is_branch_reloc(r_type)) | |
3ea0a085 | 4104 | value = target->symval_for_branch(value, gsym, object, &dest_shndx); |
42cacb20 DE |
4105 | } |
4106 | ||
42cacb20 DE |
4107 | switch (r_type) |
4108 | { | |
dd93cd0a AM |
4109 | case elfcpp::R_PPC64_REL64: |
4110 | case elfcpp::R_POWERPC_REL32: | |
4111 | case elfcpp::R_POWERPC_REL24: | |
4112 | case elfcpp::R_PPC_PLTREL24: | |
4113 | case elfcpp::R_PPC_LOCAL24PC: | |
4114 | case elfcpp::R_POWERPC_REL16: | |
4115 | case elfcpp::R_POWERPC_REL16_LO: | |
4116 | case elfcpp::R_POWERPC_REL16_HI: | |
4117 | case elfcpp::R_POWERPC_REL16_HA: | |
4118 | case elfcpp::R_POWERPC_REL14: | |
4119 | case elfcpp::R_POWERPC_REL14_BRTAKEN: | |
4120 | case elfcpp::R_POWERPC_REL14_BRNTAKEN: | |
4121 | value -= address; | |
4122 | break; | |
4123 | ||
42cacb20 DE |
4124 | case elfcpp::R_PPC64_TOC16: |
4125 | case elfcpp::R_PPC64_TOC16_LO: | |
4126 | case elfcpp::R_PPC64_TOC16_HI: | |
4127 | case elfcpp::R_PPC64_TOC16_HA: | |
4128 | case elfcpp::R_PPC64_TOC16_DS: | |
4129 | case elfcpp::R_PPC64_TOC16_LO_DS: | |
cf43a2fe | 4130 | // Subtract the TOC base address. |
c9269dff | 4131 | value -= (target->got_section()->output_section()->address() |
dd93cd0a | 4132 | + object->toc_base_offset()); |
42cacb20 DE |
4133 | break; |
4134 | ||
cf43a2fe AM |
4135 | case elfcpp::R_POWERPC_SECTOFF: |
4136 | case elfcpp::R_POWERPC_SECTOFF_LO: | |
4137 | case elfcpp::R_POWERPC_SECTOFF_HI: | |
4138 | case elfcpp::R_POWERPC_SECTOFF_HA: | |
4139 | case elfcpp::R_PPC64_SECTOFF_DS: | |
4140 | case elfcpp::R_PPC64_SECTOFF_LO_DS: | |
4141 | if (os != NULL) | |
4142 | value -= os->address(); | |
42cacb20 DE |
4143 | break; |
4144 | ||
dd93cd0a AM |
4145 | case elfcpp::R_PPC64_TPREL16_DS: |
4146 | case elfcpp::R_PPC64_TPREL16_LO_DS: | |
4147 | if (size != 64) | |
4148 | // R_PPC_TLSGD and R_PPC_TLSLD | |
4149 | break; | |
4150 | case elfcpp::R_POWERPC_TPREL16: | |
4151 | case elfcpp::R_POWERPC_TPREL16_LO: | |
4152 | case elfcpp::R_POWERPC_TPREL16_HI: | |
4153 | case elfcpp::R_POWERPC_TPREL16_HA: | |
4154 | case elfcpp::R_POWERPC_TPREL: | |
4155 | case elfcpp::R_PPC64_TPREL16_HIGHER: | |
4156 | case elfcpp::R_PPC64_TPREL16_HIGHERA: | |
4157 | case elfcpp::R_PPC64_TPREL16_HIGHEST: | |
4158 | case elfcpp::R_PPC64_TPREL16_HIGHESTA: | |
4159 | // tls symbol values are relative to tls_segment()->vaddr() | |
4160 | value -= tp_offset; | |
4161 | break; | |
4162 | ||
4163 | case elfcpp::R_PPC64_DTPREL16_DS: | |
4164 | case elfcpp::R_PPC64_DTPREL16_LO_DS: | |
4165 | case elfcpp::R_PPC64_DTPREL16_HIGHER: | |
4166 | case elfcpp::R_PPC64_DTPREL16_HIGHERA: | |
4167 | case elfcpp::R_PPC64_DTPREL16_HIGHEST: | |
4168 | case elfcpp::R_PPC64_DTPREL16_HIGHESTA: | |
4169 | if (size != 64) | |
4170 | // R_PPC_EMB_NADDR32, R_PPC_EMB_NADDR16, R_PPC_EMB_NADDR16_LO | |
4171 | // R_PPC_EMB_NADDR16_HI, R_PPC_EMB_NADDR16_HA, R_PPC_EMB_SDAI16 | |
4172 | break; | |
4173 | case elfcpp::R_POWERPC_DTPREL16: | |
4174 | case elfcpp::R_POWERPC_DTPREL16_LO: | |
4175 | case elfcpp::R_POWERPC_DTPREL16_HI: | |
4176 | case elfcpp::R_POWERPC_DTPREL16_HA: | |
4177 | case elfcpp::R_POWERPC_DTPREL: | |
4178 | // tls symbol values are relative to tls_segment()->vaddr() | |
4179 | value -= dtp_offset; | |
4180 | break; | |
4181 | ||
42cacb20 DE |
4182 | default: |
4183 | break; | |
4184 | } | |
4185 | ||
dd93cd0a | 4186 | Insn branch_bit = 0; |
42cacb20 DE |
4187 | switch (r_type) |
4188 | { | |
dd93cd0a AM |
4189 | case elfcpp::R_POWERPC_ADDR14_BRTAKEN: |
4190 | case elfcpp::R_POWERPC_REL14_BRTAKEN: | |
4191 | branch_bit = 1 << 21; | |
4192 | case elfcpp::R_POWERPC_ADDR14_BRNTAKEN: | |
4193 | case elfcpp::R_POWERPC_REL14_BRNTAKEN: | |
4194 | { | |
4195 | Insn* iview = reinterpret_cast<Insn*>(view); | |
4196 | Insn insn = elfcpp::Swap<32, big_endian>::readval(iview); | |
4197 | insn &= ~(1 << 21); | |
4198 | insn |= branch_bit; | |
4199 | if (this->is_isa_v2) | |
4200 | { | |
4201 | // Set 'a' bit. This is 0b00010 in BO field for branch | |
4202 | // on CR(BI) insns (BO == 001at or 011at), and 0b01000 | |
4203 | // for branch on CTR insns (BO == 1a00t or 1a01t). | |
4204 | if ((insn & (0x14 << 21)) == (0x04 << 21)) | |
4205 | insn |= 0x02 << 21; | |
4206 | else if ((insn & (0x14 << 21)) == (0x10 << 21)) | |
4207 | insn |= 0x08 << 21; | |
4208 | else | |
4209 | break; | |
4210 | } | |
4211 | else | |
4212 | { | |
4213 | // Invert 'y' bit if not the default. | |
4214 | if (static_cast<Signed_address>(value) < 0) | |
4215 | insn ^= 1 << 21; | |
4216 | } | |
4217 | elfcpp::Swap<32, big_endian>::writeval(iview, insn); | |
4218 | } | |
4219 | break; | |
4220 | ||
4221 | default: | |
4222 | break; | |
4223 | } | |
4224 | ||
f4baf0d4 | 4225 | typename Reloc::Overflow_check overflow = Reloc::CHECK_NONE; |
dd93cd0a AM |
4226 | switch (r_type) |
4227 | { | |
4228 | case elfcpp::R_POWERPC_ADDR32: | |
4229 | case elfcpp::R_POWERPC_UADDR32: | |
4230 | if (size == 64) | |
f4baf0d4 | 4231 | overflow = Reloc::CHECK_BITFIELD; |
42cacb20 DE |
4232 | break; |
4233 | ||
4234 | case elfcpp::R_POWERPC_REL32: | |
dd93cd0a | 4235 | if (size == 64) |
f4baf0d4 | 4236 | overflow = Reloc::CHECK_SIGNED; |
dd93cd0a AM |
4237 | break; |
4238 | ||
4239 | case elfcpp::R_POWERPC_ADDR24: | |
4240 | case elfcpp::R_POWERPC_ADDR16: | |
4241 | case elfcpp::R_POWERPC_UADDR16: | |
4242 | case elfcpp::R_PPC64_ADDR16_DS: | |
4243 | case elfcpp::R_POWERPC_ADDR14: | |
4244 | case elfcpp::R_POWERPC_ADDR14_BRTAKEN: | |
4245 | case elfcpp::R_POWERPC_ADDR14_BRNTAKEN: | |
f4baf0d4 | 4246 | overflow = Reloc::CHECK_BITFIELD; |
42cacb20 DE |
4247 | break; |
4248 | ||
4249 | case elfcpp::R_POWERPC_REL24: | |
42cacb20 | 4250 | case elfcpp::R_PPC_PLTREL24: |
cf43a2fe | 4251 | case elfcpp::R_PPC_LOCAL24PC: |
dd93cd0a AM |
4252 | case elfcpp::R_POWERPC_REL16: |
4253 | case elfcpp::R_PPC64_TOC16: | |
4254 | case elfcpp::R_POWERPC_GOT16: | |
4255 | case elfcpp::R_POWERPC_SECTOFF: | |
4256 | case elfcpp::R_POWERPC_TPREL16: | |
4257 | case elfcpp::R_POWERPC_DTPREL16: | |
4258 | case elfcpp::R_PPC64_TPREL16_DS: | |
4259 | case elfcpp::R_PPC64_DTPREL16_DS: | |
4260 | case elfcpp::R_PPC64_TOC16_DS: | |
4261 | case elfcpp::R_PPC64_GOT16_DS: | |
4262 | case elfcpp::R_PPC64_SECTOFF_DS: | |
4263 | case elfcpp::R_POWERPC_REL14: | |
4264 | case elfcpp::R_POWERPC_REL14_BRTAKEN: | |
4265 | case elfcpp::R_POWERPC_REL14_BRNTAKEN: | |
4266 | case elfcpp::R_POWERPC_GOT_TLSGD16: | |
4267 | case elfcpp::R_POWERPC_GOT_TLSLD16: | |
4268 | case elfcpp::R_POWERPC_GOT_TPREL16: | |
4269 | case elfcpp::R_POWERPC_GOT_DTPREL16: | |
f4baf0d4 | 4270 | overflow = Reloc::CHECK_SIGNED; |
42cacb20 | 4271 | break; |
dd93cd0a | 4272 | } |
42cacb20 | 4273 | |
3ea0a085 | 4274 | typename Powerpc_relocate_functions<size, big_endian>::Status status |
f4baf0d4 | 4275 | = Powerpc_relocate_functions<size, big_endian>::STATUS_OK; |
dd93cd0a AM |
4276 | switch (r_type) |
4277 | { | |
4278 | case elfcpp::R_POWERPC_NONE: | |
4279 | case elfcpp::R_POWERPC_TLS: | |
4280 | case elfcpp::R_POWERPC_GNU_VTINHERIT: | |
4281 | case elfcpp::R_POWERPC_GNU_VTENTRY: | |
4282 | case elfcpp::R_PPC_EMB_MRKREF: | |
42cacb20 DE |
4283 | break; |
4284 | ||
4285 | case elfcpp::R_PPC64_ADDR64: | |
dd93cd0a | 4286 | case elfcpp::R_PPC64_REL64: |
cf43a2fe | 4287 | case elfcpp::R_PPC64_TOC: |
dd93cd0a AM |
4288 | Reloc::addr64(view, value); |
4289 | break; | |
4290 | ||
4291 | case elfcpp::R_POWERPC_TPREL: | |
4292 | case elfcpp::R_POWERPC_DTPREL: | |
4293 | if (size == 64) | |
4294 | Reloc::addr64(view, value); | |
4295 | else | |
3ea0a085 | 4296 | status = Reloc::addr32(view, value, overflow); |
dd93cd0a AM |
4297 | break; |
4298 | ||
4299 | case elfcpp::R_PPC64_UADDR64: | |
4300 | Reloc::addr64_u(view, value); | |
42cacb20 DE |
4301 | break; |
4302 | ||
4303 | case elfcpp::R_POWERPC_ADDR32: | |
dd93cd0a | 4304 | case elfcpp::R_POWERPC_REL32: |
3ea0a085 | 4305 | status = Reloc::addr32(view, value, overflow); |
dd93cd0a AM |
4306 | break; |
4307 | ||
4308 | case elfcpp::R_POWERPC_UADDR32: | |
3ea0a085 | 4309 | status = Reloc::addr32_u(view, value, overflow); |
dd93cd0a AM |
4310 | break; |
4311 | ||
4312 | case elfcpp::R_POWERPC_ADDR24: | |
4313 | case elfcpp::R_POWERPC_REL24: | |
4314 | case elfcpp::R_PPC_PLTREL24: | |
4315 | case elfcpp::R_PPC_LOCAL24PC: | |
3ea0a085 | 4316 | status = Reloc::addr24(view, value, overflow); |
42cacb20 DE |
4317 | break; |
4318 | ||
dd93cd0a AM |
4319 | case elfcpp::R_POWERPC_GOT_DTPREL16: |
4320 | case elfcpp::R_POWERPC_GOT_DTPREL16_LO: | |
4321 | if (size == 64) | |
4322 | { | |
3ea0a085 | 4323 | status = Reloc::addr16_ds(view, value, overflow); |
dd93cd0a AM |
4324 | break; |
4325 | } | |
cf43a2fe | 4326 | case elfcpp::R_POWERPC_ADDR16: |
dd93cd0a | 4327 | case elfcpp::R_POWERPC_REL16: |
cf43a2fe | 4328 | case elfcpp::R_PPC64_TOC16: |
42cacb20 | 4329 | case elfcpp::R_POWERPC_GOT16: |
cf43a2fe | 4330 | case elfcpp::R_POWERPC_SECTOFF: |
dd93cd0a AM |
4331 | case elfcpp::R_POWERPC_TPREL16: |
4332 | case elfcpp::R_POWERPC_DTPREL16: | |
4333 | case elfcpp::R_POWERPC_GOT_TLSGD16: | |
4334 | case elfcpp::R_POWERPC_GOT_TLSLD16: | |
4335 | case elfcpp::R_POWERPC_GOT_TPREL16: | |
cf43a2fe | 4336 | case elfcpp::R_POWERPC_ADDR16_LO: |
dd93cd0a | 4337 | case elfcpp::R_POWERPC_REL16_LO: |
cf43a2fe | 4338 | case elfcpp::R_PPC64_TOC16_LO: |
42cacb20 | 4339 | case elfcpp::R_POWERPC_GOT16_LO: |
cf43a2fe | 4340 | case elfcpp::R_POWERPC_SECTOFF_LO: |
dd93cd0a AM |
4341 | case elfcpp::R_POWERPC_TPREL16_LO: |
4342 | case elfcpp::R_POWERPC_DTPREL16_LO: | |
4343 | case elfcpp::R_POWERPC_GOT_TLSGD16_LO: | |
4344 | case elfcpp::R_POWERPC_GOT_TLSLD16_LO: | |
4345 | case elfcpp::R_POWERPC_GOT_TPREL16_LO: | |
3ea0a085 | 4346 | status = Reloc::addr16(view, value, overflow); |
dd93cd0a AM |
4347 | break; |
4348 | ||
4349 | case elfcpp::R_POWERPC_UADDR16: | |
3ea0a085 | 4350 | status = Reloc::addr16_u(view, value, overflow); |
42cacb20 DE |
4351 | break; |
4352 | ||
cf43a2fe | 4353 | case elfcpp::R_POWERPC_ADDR16_HI: |
dd93cd0a | 4354 | case elfcpp::R_POWERPC_REL16_HI: |
cf43a2fe | 4355 | case elfcpp::R_PPC64_TOC16_HI: |
42cacb20 | 4356 | case elfcpp::R_POWERPC_GOT16_HI: |
cf43a2fe | 4357 | case elfcpp::R_POWERPC_SECTOFF_HI: |
dd93cd0a AM |
4358 | case elfcpp::R_POWERPC_TPREL16_HI: |
4359 | case elfcpp::R_POWERPC_DTPREL16_HI: | |
4360 | case elfcpp::R_POWERPC_GOT_TLSGD16_HI: | |
4361 | case elfcpp::R_POWERPC_GOT_TLSLD16_HI: | |
4362 | case elfcpp::R_POWERPC_GOT_TPREL16_HI: | |
4363 | case elfcpp::R_POWERPC_GOT_DTPREL16_HI: | |
4364 | Reloc::addr16_hi(view, value); | |
42cacb20 DE |
4365 | break; |
4366 | ||
cf43a2fe | 4367 | case elfcpp::R_POWERPC_ADDR16_HA: |
dd93cd0a | 4368 | case elfcpp::R_POWERPC_REL16_HA: |
cf43a2fe | 4369 | case elfcpp::R_PPC64_TOC16_HA: |
42cacb20 | 4370 | case elfcpp::R_POWERPC_GOT16_HA: |
cf43a2fe | 4371 | case elfcpp::R_POWERPC_SECTOFF_HA: |
dd93cd0a AM |
4372 | case elfcpp::R_POWERPC_TPREL16_HA: |
4373 | case elfcpp::R_POWERPC_DTPREL16_HA: | |
4374 | case elfcpp::R_POWERPC_GOT_TLSGD16_HA: | |
4375 | case elfcpp::R_POWERPC_GOT_TLSLD16_HA: | |
4376 | case elfcpp::R_POWERPC_GOT_TPREL16_HA: | |
4377 | case elfcpp::R_POWERPC_GOT_DTPREL16_HA: | |
4378 | Reloc::addr16_ha(view, value); | |
42cacb20 DE |
4379 | break; |
4380 | ||
dd93cd0a AM |
4381 | case elfcpp::R_PPC64_DTPREL16_HIGHER: |
4382 | if (size == 32) | |
4383 | // R_PPC_EMB_NADDR16_LO | |
4384 | goto unsupp; | |
4385 | case elfcpp::R_PPC64_ADDR16_HIGHER: | |
4386 | case elfcpp::R_PPC64_TPREL16_HIGHER: | |
4387 | Reloc::addr16_hi2(view, value); | |
42cacb20 DE |
4388 | break; |
4389 | ||
dd93cd0a AM |
4390 | case elfcpp::R_PPC64_DTPREL16_HIGHERA: |
4391 | if (size == 32) | |
4392 | // R_PPC_EMB_NADDR16_HI | |
4393 | goto unsupp; | |
4394 | case elfcpp::R_PPC64_ADDR16_HIGHERA: | |
4395 | case elfcpp::R_PPC64_TPREL16_HIGHERA: | |
4396 | Reloc::addr16_ha2(view, value); | |
42cacb20 DE |
4397 | break; |
4398 | ||
dd93cd0a AM |
4399 | case elfcpp::R_PPC64_DTPREL16_HIGHEST: |
4400 | if (size == 32) | |
4401 | // R_PPC_EMB_NADDR16_HA | |
4402 | goto unsupp; | |
4403 | case elfcpp::R_PPC64_ADDR16_HIGHEST: | |
4404 | case elfcpp::R_PPC64_TPREL16_HIGHEST: | |
4405 | Reloc::addr16_hi3(view, value); | |
42cacb20 DE |
4406 | break; |
4407 | ||
dd93cd0a AM |
4408 | case elfcpp::R_PPC64_DTPREL16_HIGHESTA: |
4409 | if (size == 32) | |
4410 | // R_PPC_EMB_SDAI16 | |
4411 | goto unsupp; | |
4412 | case elfcpp::R_PPC64_ADDR16_HIGHESTA: | |
4413 | case elfcpp::R_PPC64_TPREL16_HIGHESTA: | |
4414 | Reloc::addr16_ha3(view, value); | |
4415 | break; | |
4416 | ||
4417 | case elfcpp::R_PPC64_DTPREL16_DS: | |
4418 | case elfcpp::R_PPC64_DTPREL16_LO_DS: | |
4419 | if (size == 32) | |
4420 | // R_PPC_EMB_NADDR32, R_PPC_EMB_NADDR16 | |
4421 | goto unsupp; | |
4422 | case elfcpp::R_PPC64_TPREL16_DS: | |
4423 | case elfcpp::R_PPC64_TPREL16_LO_DS: | |
4424 | if (size == 32) | |
4425 | // R_PPC_TLSGD, R_PPC_TLSLD | |
4426 | break; | |
cf43a2fe AM |
4427 | case elfcpp::R_PPC64_ADDR16_DS: |
4428 | case elfcpp::R_PPC64_ADDR16_LO_DS: | |
42cacb20 DE |
4429 | case elfcpp::R_PPC64_TOC16_DS: |
4430 | case elfcpp::R_PPC64_TOC16_LO_DS: | |
cf43a2fe AM |
4431 | case elfcpp::R_PPC64_GOT16_DS: |
4432 | case elfcpp::R_PPC64_GOT16_LO_DS: | |
4433 | case elfcpp::R_PPC64_SECTOFF_DS: | |
4434 | case elfcpp::R_PPC64_SECTOFF_LO_DS: | |
3ea0a085 | 4435 | status = Reloc::addr16_ds(view, value, overflow); |
dd93cd0a AM |
4436 | break; |
4437 | ||
4438 | case elfcpp::R_POWERPC_ADDR14: | |
4439 | case elfcpp::R_POWERPC_ADDR14_BRTAKEN: | |
4440 | case elfcpp::R_POWERPC_ADDR14_BRNTAKEN: | |
4441 | case elfcpp::R_POWERPC_REL14: | |
4442 | case elfcpp::R_POWERPC_REL14_BRTAKEN: | |
4443 | case elfcpp::R_POWERPC_REL14_BRNTAKEN: | |
3ea0a085 | 4444 | status = Reloc::addr14(view, value, overflow); |
42cacb20 DE |
4445 | break; |
4446 | ||
4447 | case elfcpp::R_POWERPC_COPY: | |
4448 | case elfcpp::R_POWERPC_GLOB_DAT: | |
4449 | case elfcpp::R_POWERPC_JMP_SLOT: | |
4450 | case elfcpp::R_POWERPC_RELATIVE: | |
42cacb20 | 4451 | case elfcpp::R_POWERPC_DTPMOD: |
dd93cd0a AM |
4452 | case elfcpp::R_PPC64_JMP_IREL: |
4453 | case elfcpp::R_POWERPC_IRELATIVE: | |
42cacb20 DE |
4454 | gold_error_at_location(relinfo, relnum, rela.get_r_offset(), |
4455 | _("unexpected reloc %u in object file"), | |
4456 | r_type); | |
4457 | break; | |
4458 | ||
dd93cd0a AM |
4459 | case elfcpp::R_PPC_EMB_SDA21: |
4460 | if (size == 32) | |
4461 | goto unsupp; | |
4462 | else | |
4463 | { | |
4464 | // R_PPC64_TOCSAVE. For the time being this can be ignored. | |
4465 | } | |
4466 | break; | |
4467 | ||
4468 | case elfcpp::R_PPC_EMB_SDA2I16: | |
4469 | case elfcpp::R_PPC_EMB_SDA2REL: | |
4470 | if (size == 32) | |
4471 | goto unsupp; | |
4472 | // R_PPC64_TLSGD, R_PPC64_TLSLD | |
6ce78956 AM |
4473 | break; |
4474 | ||
dd93cd0a AM |
4475 | case elfcpp::R_POWERPC_PLT32: |
4476 | case elfcpp::R_POWERPC_PLTREL32: | |
4477 | case elfcpp::R_POWERPC_PLT16_LO: | |
4478 | case elfcpp::R_POWERPC_PLT16_HI: | |
4479 | case elfcpp::R_POWERPC_PLT16_HA: | |
4480 | case elfcpp::R_PPC_SDAREL16: | |
4481 | case elfcpp::R_POWERPC_ADDR30: | |
4482 | case elfcpp::R_PPC64_PLT64: | |
4483 | case elfcpp::R_PPC64_PLTREL64: | |
4484 | case elfcpp::R_PPC64_PLTGOT16: | |
4485 | case elfcpp::R_PPC64_PLTGOT16_LO: | |
4486 | case elfcpp::R_PPC64_PLTGOT16_HI: | |
4487 | case elfcpp::R_PPC64_PLTGOT16_HA: | |
4488 | case elfcpp::R_PPC64_PLT16_LO_DS: | |
4489 | case elfcpp::R_PPC64_PLTGOT16_DS: | |
4490 | case elfcpp::R_PPC64_PLTGOT16_LO_DS: | |
4491 | case elfcpp::R_PPC_EMB_RELSEC16: | |
4492 | case elfcpp::R_PPC_EMB_RELST_LO: | |
4493 | case elfcpp::R_PPC_EMB_RELST_HI: | |
4494 | case elfcpp::R_PPC_EMB_RELST_HA: | |
4495 | case elfcpp::R_PPC_EMB_BIT_FLD: | |
4496 | case elfcpp::R_PPC_EMB_RELSDA: | |
4497 | case elfcpp::R_PPC_TOC16: | |
42cacb20 | 4498 | default: |
dd93cd0a | 4499 | unsupp: |
42cacb20 DE |
4500 | gold_error_at_location(relinfo, relnum, rela.get_r_offset(), |
4501 | _("unsupported reloc %u"), | |
4502 | r_type); | |
4503 | break; | |
4504 | } | |
f4baf0d4 | 4505 | if (status != Powerpc_relocate_functions<size, big_endian>::STATUS_OK) |
3ea0a085 AM |
4506 | gold_error_at_location(relinfo, relnum, rela.get_r_offset(), |
4507 | _("relocation overflow")); | |
42cacb20 DE |
4508 | |
4509 | return true; | |
4510 | } | |
4511 | ||
42cacb20 DE |
4512 | // Relocate section data. |
4513 | ||
4514 | template<int size, bool big_endian> | |
4515 | void | |
4516 | Target_powerpc<size, big_endian>::relocate_section( | |
d83ce4e3 AM |
4517 | const Relocate_info<size, big_endian>* relinfo, |
4518 | unsigned int sh_type, | |
4519 | const unsigned char* prelocs, | |
4520 | size_t reloc_count, | |
4521 | Output_section* output_section, | |
4522 | bool needs_special_offset_handling, | |
4523 | unsigned char* view, | |
c9269dff | 4524 | Address address, |
d83ce4e3 AM |
4525 | section_size_type view_size, |
4526 | const Reloc_symbol_changes* reloc_symbol_changes) | |
42cacb20 DE |
4527 | { |
4528 | typedef Target_powerpc<size, big_endian> Powerpc; | |
4529 | typedef typename Target_powerpc<size, big_endian>::Relocate Powerpc_relocate; | |
4530 | ||
4531 | gold_assert(sh_type == elfcpp::SHT_RELA); | |
4532 | ||
bfdfa4cd AM |
4533 | unsigned char *opd_rel = NULL; |
4534 | Powerpc_relobj<size, big_endian>* const object | |
4535 | = static_cast<Powerpc_relobj<size, big_endian>*>(relinfo->object); | |
4536 | if (size == 64 | |
4537 | && relinfo->data_shndx == object->opd_shndx()) | |
4538 | { | |
4539 | // Rewrite opd relocs, omitting those for discarded sections | |
4540 | // to silence gold::relocate_section errors. | |
4541 | const int reloc_size | |
4542 | = Reloc_types<elfcpp::SHT_RELA, size, big_endian>::reloc_size; | |
4543 | opd_rel = new unsigned char[reloc_count * reloc_size]; | |
4544 | const unsigned char* rrel = prelocs; | |
4545 | unsigned char* wrel = opd_rel; | |
4546 | ||
4547 | for (size_t i = 0; | |
4548 | i < reloc_count; | |
4549 | ++i, rrel += reloc_size, wrel += reloc_size) | |
4550 | { | |
4551 | typename Reloc_types<elfcpp::SHT_RELA, size, big_endian>::Reloc | |
4552 | reloc(rrel); | |
4553 | typename elfcpp::Elf_types<size>::Elf_WXword r_info | |
4554 | = reloc.get_r_info(); | |
4555 | unsigned int r_type = elfcpp::elf_r_type<size>(r_info); | |
4556 | Address r_off = reloc.get_r_offset(); | |
4557 | if (r_type == elfcpp::R_PPC64_TOC) | |
4558 | r_off -= 8; | |
4559 | bool is_discarded = object->get_opd_discard(r_off); | |
4560 | ||
4561 | // Reloc number is reported in some errors, so keep all relocs. | |
4562 | if (is_discarded) | |
4563 | memset(wrel, 0, reloc_size); | |
4564 | else | |
4565 | memcpy(wrel, rrel, reloc_size); | |
4566 | } | |
4567 | prelocs = opd_rel; | |
4568 | } | |
4569 | ||
42cacb20 | 4570 | gold::relocate_section<size, big_endian, Powerpc, elfcpp::SHT_RELA, |
d83ce4e3 | 4571 | Powerpc_relocate>( |
42cacb20 DE |
4572 | relinfo, |
4573 | this, | |
4574 | prelocs, | |
4575 | reloc_count, | |
4576 | output_section, | |
4577 | needs_special_offset_handling, | |
4578 | view, | |
4579 | address, | |
364c7fa5 ILT |
4580 | view_size, |
4581 | reloc_symbol_changes); | |
bfdfa4cd AM |
4582 | |
4583 | if (opd_rel != NULL) | |
4584 | delete[] opd_rel; | |
42cacb20 DE |
4585 | } |
4586 | ||
cf43a2fe | 4587 | class Powerpc_scan_relocatable_reloc |
42cacb20 | 4588 | { |
cf43a2fe AM |
4589 | public: |
4590 | // Return the strategy to use for a local symbol which is not a | |
4591 | // section symbol, given the relocation type. | |
4592 | inline Relocatable_relocs::Reloc_strategy | |
4593 | local_non_section_strategy(unsigned int r_type, Relobj*, unsigned int r_sym) | |
4594 | { | |
4595 | if (r_type == 0 && r_sym == 0) | |
4596 | return Relocatable_relocs::RELOC_DISCARD; | |
4597 | return Relocatable_relocs::RELOC_COPY; | |
4598 | } | |
4599 | ||
4600 | // Return the strategy to use for a local symbol which is a section | |
4601 | // symbol, given the relocation type. | |
4602 | inline Relocatable_relocs::Reloc_strategy | |
4603 | local_section_strategy(unsigned int, Relobj*) | |
4604 | { | |
4605 | return Relocatable_relocs::RELOC_ADJUST_FOR_SECTION_RELA; | |
4606 | } | |
4607 | ||
4608 | // Return the strategy to use for a global symbol, given the | |
4609 | // relocation type, the object, and the symbol index. | |
4610 | inline Relocatable_relocs::Reloc_strategy | |
4611 | global_strategy(unsigned int r_type, Relobj*, unsigned int) | |
4612 | { | |
4613 | if (r_type == elfcpp::R_PPC_PLTREL24) | |
4614 | return Relocatable_relocs::RELOC_SPECIAL; | |
4615 | return Relocatable_relocs::RELOC_COPY; | |
4616 | } | |
4617 | }; | |
42cacb20 DE |
4618 | |
4619 | // Scan the relocs during a relocatable link. | |
4620 | ||
4621 | template<int size, bool big_endian> | |
4622 | void | |
4623 | Target_powerpc<size, big_endian>::scan_relocatable_relocs( | |
d83ce4e3 AM |
4624 | Symbol_table* symtab, |
4625 | Layout* layout, | |
4626 | Sized_relobj_file<size, big_endian>* object, | |
4627 | unsigned int data_shndx, | |
4628 | unsigned int sh_type, | |
4629 | const unsigned char* prelocs, | |
4630 | size_t reloc_count, | |
4631 | Output_section* output_section, | |
4632 | bool needs_special_offset_handling, | |
4633 | size_t local_symbol_count, | |
4634 | const unsigned char* plocal_symbols, | |
4635 | Relocatable_relocs* rr) | |
42cacb20 DE |
4636 | { |
4637 | gold_assert(sh_type == elfcpp::SHT_RELA); | |
4638 | ||
42cacb20 | 4639 | gold::scan_relocatable_relocs<size, big_endian, elfcpp::SHT_RELA, |
d83ce4e3 | 4640 | Powerpc_scan_relocatable_reloc>( |
42cacb20 DE |
4641 | symtab, |
4642 | layout, | |
4643 | object, | |
4644 | data_shndx, | |
4645 | prelocs, | |
4646 | reloc_count, | |
4647 | output_section, | |
4648 | needs_special_offset_handling, | |
4649 | local_symbol_count, | |
4650 | plocal_symbols, | |
4651 | rr); | |
4652 | } | |
4653 | ||
7404fe1b | 4654 | // Emit relocations for a section. |
dd93cd0a AM |
4655 | // This is a modified version of the function by the same name in |
4656 | // target-reloc.h. Using relocate_special_relocatable for | |
4657 | // R_PPC_PLTREL24 would require duplication of the entire body of the | |
4658 | // loop, so we may as well duplicate the whole thing. | |
42cacb20 DE |
4659 | |
4660 | template<int size, bool big_endian> | |
4661 | void | |
7404fe1b | 4662 | Target_powerpc<size, big_endian>::relocate_relocs( |
42cacb20 DE |
4663 | const Relocate_info<size, big_endian>* relinfo, |
4664 | unsigned int sh_type, | |
4665 | const unsigned char* prelocs, | |
4666 | size_t reloc_count, | |
4667 | Output_section* output_section, | |
4668 | off_t offset_in_output_section, | |
4669 | const Relocatable_relocs* rr, | |
cf43a2fe | 4670 | unsigned char*, |
dd93cd0a | 4671 | Address view_address, |
cf43a2fe | 4672 | section_size_type, |
42cacb20 DE |
4673 | unsigned char* reloc_view, |
4674 | section_size_type reloc_view_size) | |
4675 | { | |
4676 | gold_assert(sh_type == elfcpp::SHT_RELA); | |
4677 | ||
cf43a2fe AM |
4678 | typedef typename Reloc_types<elfcpp::SHT_RELA, size, big_endian>::Reloc |
4679 | Reltype; | |
4680 | typedef typename Reloc_types<elfcpp::SHT_RELA, size, big_endian>::Reloc_write | |
4681 | Reltype_write; | |
4682 | const int reloc_size | |
4683 | = Reloc_types<elfcpp::SHT_RELA, size, big_endian>::reloc_size; | |
cf43a2fe AM |
4684 | |
4685 | Powerpc_relobj<size, big_endian>* const object | |
4686 | = static_cast<Powerpc_relobj<size, big_endian>*>(relinfo->object); | |
4687 | const unsigned int local_count = object->local_symbol_count(); | |
4688 | unsigned int got2_shndx = object->got2_shndx(); | |
c9269dff | 4689 | Address got2_addend = 0; |
cf43a2fe | 4690 | if (got2_shndx != 0) |
c9269dff AM |
4691 | { |
4692 | got2_addend = object->get_output_section_offset(got2_shndx); | |
4693 | gold_assert(got2_addend != invalid_address); | |
4694 | } | |
cf43a2fe AM |
4695 | |
4696 | unsigned char* pwrite = reloc_view; | |
7404fe1b | 4697 | bool zap_next = false; |
cf43a2fe AM |
4698 | for (size_t i = 0; i < reloc_count; ++i, prelocs += reloc_size) |
4699 | { | |
4700 | Relocatable_relocs::Reloc_strategy strategy = rr->strategy(i); | |
4701 | if (strategy == Relocatable_relocs::RELOC_DISCARD) | |
4702 | continue; | |
4703 | ||
4704 | Reltype reloc(prelocs); | |
4705 | Reltype_write reloc_write(pwrite); | |
4706 | ||
7404fe1b | 4707 | Address offset = reloc.get_r_offset(); |
cf43a2fe | 4708 | typename elfcpp::Elf_types<size>::Elf_WXword r_info = reloc.get_r_info(); |
7404fe1b AM |
4709 | unsigned int r_sym = elfcpp::elf_r_sym<size>(r_info); |
4710 | unsigned int r_type = elfcpp::elf_r_type<size>(r_info); | |
4711 | const unsigned int orig_r_sym = r_sym; | |
4712 | typename elfcpp::Elf_types<size>::Elf_Swxword addend | |
4713 | = reloc.get_r_addend(); | |
4714 | const Symbol* gsym = NULL; | |
4715 | ||
4716 | if (zap_next) | |
4717 | { | |
4718 | // We could arrange to discard these and other relocs for | |
4719 | // tls optimised sequences in the strategy methods, but for | |
4720 | // now do as BFD ld does. | |
4721 | r_type = elfcpp::R_POWERPC_NONE; | |
4722 | zap_next = false; | |
4723 | } | |
cf43a2fe AM |
4724 | |
4725 | // Get the new symbol index. | |
cf43a2fe AM |
4726 | if (r_sym < local_count) |
4727 | { | |
4728 | switch (strategy) | |
4729 | { | |
4730 | case Relocatable_relocs::RELOC_COPY: | |
4731 | case Relocatable_relocs::RELOC_SPECIAL: | |
7404fe1b | 4732 | if (r_sym != 0) |
dd93cd0a | 4733 | { |
7404fe1b AM |
4734 | r_sym = object->symtab_index(r_sym); |
4735 | gold_assert(r_sym != -1U); | |
dd93cd0a | 4736 | } |
cf43a2fe AM |
4737 | break; |
4738 | ||
4739 | case Relocatable_relocs::RELOC_ADJUST_FOR_SECTION_RELA: | |
4740 | { | |
4741 | // We are adjusting a section symbol. We need to find | |
4742 | // the symbol table index of the section symbol for | |
4743 | // the output section corresponding to input section | |
4744 | // in which this symbol is defined. | |
4745 | gold_assert(r_sym < local_count); | |
4746 | bool is_ordinary; | |
4747 | unsigned int shndx = | |
4748 | object->local_symbol_input_shndx(r_sym, &is_ordinary); | |
4749 | gold_assert(is_ordinary); | |
4750 | Output_section* os = object->output_section(shndx); | |
4751 | gold_assert(os != NULL); | |
4752 | gold_assert(os->needs_symtab_index()); | |
7404fe1b | 4753 | r_sym = os->symtab_index(); |
cf43a2fe AM |
4754 | } |
4755 | break; | |
4756 | ||
4757 | default: | |
4758 | gold_unreachable(); | |
4759 | } | |
4760 | } | |
4761 | else | |
4762 | { | |
7404fe1b | 4763 | gsym = object->global_symbol(r_sym); |
cf43a2fe AM |
4764 | gold_assert(gsym != NULL); |
4765 | if (gsym->is_forwarder()) | |
4766 | gsym = relinfo->symtab->resolve_forwards(gsym); | |
4767 | ||
4768 | gold_assert(gsym->has_symtab_index()); | |
7404fe1b | 4769 | r_sym = gsym->symtab_index(); |
cf43a2fe AM |
4770 | } |
4771 | ||
4772 | // Get the new offset--the location in the output section where | |
4773 | // this relocation should be applied. | |
cf43a2fe | 4774 | if (static_cast<Address>(offset_in_output_section) != invalid_address) |
7404fe1b | 4775 | offset += offset_in_output_section; |
cf43a2fe AM |
4776 | else |
4777 | { | |
c9269dff AM |
4778 | section_offset_type sot_offset = |
4779 | convert_types<section_offset_type, Address>(offset); | |
cf43a2fe | 4780 | section_offset_type new_sot_offset = |
c9269dff AM |
4781 | output_section->output_offset(object, relinfo->data_shndx, |
4782 | sot_offset); | |
cf43a2fe | 4783 | gold_assert(new_sot_offset != -1); |
7404fe1b | 4784 | offset = new_sot_offset; |
cf43a2fe AM |
4785 | } |
4786 | ||
dd93cd0a AM |
4787 | // In an object file, r_offset is an offset within the section. |
4788 | // In an executable or dynamic object, generated by | |
4789 | // --emit-relocs, r_offset is an absolute address. | |
7404fe1b | 4790 | if (!parameters->options().relocatable()) |
dd93cd0a | 4791 | { |
7404fe1b | 4792 | offset += view_address; |
dd93cd0a | 4793 | if (static_cast<Address>(offset_in_output_section) != invalid_address) |
7404fe1b | 4794 | offset -= offset_in_output_section; |
dd93cd0a AM |
4795 | } |
4796 | ||
cf43a2fe | 4797 | // Handle the reloc addend based on the strategy. |
cf43a2fe AM |
4798 | if (strategy == Relocatable_relocs::RELOC_COPY) |
4799 | ; | |
4800 | else if (strategy == Relocatable_relocs::RELOC_ADJUST_FOR_SECTION_RELA) | |
4801 | { | |
7404fe1b | 4802 | const Symbol_value<size>* psymval = object->local_symbol(orig_r_sym); |
cf43a2fe AM |
4803 | addend = psymval->value(object, addend); |
4804 | } | |
4805 | else if (strategy == Relocatable_relocs::RELOC_SPECIAL) | |
4806 | { | |
4807 | if (addend >= 32768) | |
4808 | addend += got2_addend; | |
4809 | } | |
4810 | else | |
4811 | gold_unreachable(); | |
4812 | ||
7404fe1b AM |
4813 | if (!parameters->options().relocatable()) |
4814 | { | |
4815 | if (r_type == elfcpp::R_POWERPC_GOT_TLSGD16 | |
4816 | || r_type == elfcpp::R_POWERPC_GOT_TLSGD16_LO | |
4817 | || r_type == elfcpp::R_POWERPC_GOT_TLSGD16_HI | |
4818 | || r_type == elfcpp::R_POWERPC_GOT_TLSGD16_HA) | |
4819 | { | |
4820 | // First instruction of a global dynamic sequence, | |
4821 | // arg setup insn. | |
4822 | const bool final = gsym == NULL || gsym->final_value_is_known(); | |
4823 | switch (this->optimize_tls_gd(final)) | |
4824 | { | |
4825 | case tls::TLSOPT_TO_IE: | |
4826 | r_type += (elfcpp::R_POWERPC_GOT_TPREL16 | |
4827 | - elfcpp::R_POWERPC_GOT_TLSGD16); | |
4828 | break; | |
4829 | case tls::TLSOPT_TO_LE: | |
4830 | if (r_type == elfcpp::R_POWERPC_GOT_TLSGD16 | |
4831 | || r_type == elfcpp::R_POWERPC_GOT_TLSGD16_LO) | |
4832 | r_type = elfcpp::R_POWERPC_TPREL16_HA; | |
4833 | else | |
4834 | { | |
4835 | r_type = elfcpp::R_POWERPC_NONE; | |
4836 | offset -= 2 * big_endian; | |
4837 | } | |
4838 | break; | |
4839 | default: | |
4840 | break; | |
4841 | } | |
4842 | } | |
4843 | else if (r_type == elfcpp::R_POWERPC_GOT_TLSLD16 | |
4844 | || r_type == elfcpp::R_POWERPC_GOT_TLSLD16_LO | |
4845 | || r_type == elfcpp::R_POWERPC_GOT_TLSLD16_HI | |
4846 | || r_type == elfcpp::R_POWERPC_GOT_TLSLD16_HA) | |
4847 | { | |
4848 | // First instruction of a local dynamic sequence, | |
4849 | // arg setup insn. | |
4850 | if (this->optimize_tls_ld() == tls::TLSOPT_TO_LE) | |
4851 | { | |
4852 | if (r_type == elfcpp::R_POWERPC_GOT_TLSLD16 | |
4853 | || r_type == elfcpp::R_POWERPC_GOT_TLSLD16_LO) | |
4854 | { | |
4855 | r_type = elfcpp::R_POWERPC_TPREL16_HA; | |
4856 | const Output_section* os = relinfo->layout->tls_segment() | |
4857 | ->first_section(); | |
4858 | gold_assert(os != NULL); | |
4859 | gold_assert(os->needs_symtab_index()); | |
4860 | r_sym = os->symtab_index(); | |
4861 | addend = dtp_offset; | |
4862 | } | |
4863 | else | |
4864 | { | |
4865 | r_type = elfcpp::R_POWERPC_NONE; | |
4866 | offset -= 2 * big_endian; | |
4867 | } | |
4868 | } | |
4869 | } | |
4870 | else if (r_type == elfcpp::R_POWERPC_GOT_TPREL16 | |
4871 | || r_type == elfcpp::R_POWERPC_GOT_TPREL16_LO | |
4872 | || r_type == elfcpp::R_POWERPC_GOT_TPREL16_HI | |
4873 | || r_type == elfcpp::R_POWERPC_GOT_TPREL16_HA) | |
4874 | { | |
4875 | // First instruction of initial exec sequence. | |
4876 | const bool final = gsym == NULL || gsym->final_value_is_known(); | |
4877 | if (this->optimize_tls_ie(final) == tls::TLSOPT_TO_LE) | |
4878 | { | |
4879 | if (r_type == elfcpp::R_POWERPC_GOT_TPREL16 | |
4880 | || r_type == elfcpp::R_POWERPC_GOT_TPREL16_LO) | |
4881 | r_type = elfcpp::R_POWERPC_TPREL16_HA; | |
4882 | else | |
4883 | { | |
4884 | r_type = elfcpp::R_POWERPC_NONE; | |
4885 | offset -= 2 * big_endian; | |
4886 | } | |
4887 | } | |
4888 | } | |
4889 | else if ((size == 64 && r_type == elfcpp::R_PPC64_TLSGD) | |
4890 | || (size == 32 && r_type == elfcpp::R_PPC_TLSGD)) | |
4891 | { | |
4892 | // Second instruction of a global dynamic sequence, | |
4893 | // the __tls_get_addr call | |
4894 | const bool final = gsym == NULL || gsym->final_value_is_known(); | |
4895 | switch (this->optimize_tls_gd(final)) | |
4896 | { | |
4897 | case tls::TLSOPT_TO_IE: | |
4898 | r_type = elfcpp::R_POWERPC_NONE; | |
4899 | zap_next = true; | |
4900 | break; | |
4901 | case tls::TLSOPT_TO_LE: | |
4902 | r_type = elfcpp::R_POWERPC_TPREL16_LO; | |
4903 | offset += 2 * big_endian; | |
4904 | zap_next = true; | |
4905 | break; | |
4906 | default: | |
4907 | break; | |
4908 | } | |
4909 | } | |
4910 | else if ((size == 64 && r_type == elfcpp::R_PPC64_TLSLD) | |
4911 | || (size == 32 && r_type == elfcpp::R_PPC_TLSLD)) | |
4912 | { | |
4913 | // Second instruction of a local dynamic sequence, | |
4914 | // the __tls_get_addr call | |
4915 | if (this->optimize_tls_ld() == tls::TLSOPT_TO_LE) | |
4916 | { | |
4917 | const Output_section* os = relinfo->layout->tls_segment() | |
4918 | ->first_section(); | |
4919 | gold_assert(os != NULL); | |
4920 | gold_assert(os->needs_symtab_index()); | |
4921 | r_sym = os->symtab_index(); | |
4922 | addend = dtp_offset; | |
4923 | r_type = elfcpp::R_POWERPC_TPREL16_LO; | |
4924 | offset += 2 * big_endian; | |
4925 | zap_next = true; | |
4926 | } | |
4927 | } | |
4928 | else if (r_type == elfcpp::R_POWERPC_TLS) | |
4929 | { | |
4930 | // Second instruction of an initial exec sequence | |
4931 | const bool final = gsym == NULL || gsym->final_value_is_known(); | |
4932 | if (this->optimize_tls_ie(final) == tls::TLSOPT_TO_LE) | |
4933 | { | |
4934 | r_type = elfcpp::R_POWERPC_TPREL16_LO; | |
4935 | offset += 2 * big_endian; | |
4936 | } | |
4937 | } | |
4938 | } | |
4939 | ||
4940 | reloc_write.put_r_offset(offset); | |
4941 | reloc_write.put_r_info(elfcpp::elf_r_info<size>(r_sym, r_type)); | |
4942 | reloc_write.put_r_addend(addend); | |
cf43a2fe AM |
4943 | |
4944 | pwrite += reloc_size; | |
4945 | } | |
4946 | ||
4947 | gold_assert(static_cast<section_size_type>(pwrite - reloc_view) | |
4948 | == reloc_view_size); | |
42cacb20 DE |
4949 | } |
4950 | ||
4951 | // Return the value to use for a dynamic which requires special | |
4952 | // treatment. This is how we support equality comparisons of function | |
4953 | // pointers across shared library boundaries, as described in the | |
4954 | // processor specific ABI supplement. | |
4955 | ||
4956 | template<int size, bool big_endian> | |
4957 | uint64_t | |
4958 | Target_powerpc<size, big_endian>::do_dynsym_value(const Symbol* gsym) const | |
4959 | { | |
cf43a2fe AM |
4960 | if (size == 32) |
4961 | { | |
4962 | gold_assert(gsym->is_from_dynobj() && gsym->has_plt_offset()); | |
e5d5f5ed AM |
4963 | const Output_data_glink<size, big_endian>* glink = this->glink_section(); |
4964 | static const unsigned char zeros[elfcpp::Elf_sizes<32>::rela_size] = {0}; | |
4965 | const elfcpp::Rela<size, big_endian> zero_reloc(zeros); | |
4966 | unsigned int glink_index = glink->find_entry(gsym, zero_reloc, NULL); | |
4967 | return glink->address() + glink_index * glink->glink_entry_size(); | |
cf43a2fe AM |
4968 | } |
4969 | else | |
4970 | gold_unreachable(); | |
42cacb20 DE |
4971 | } |
4972 | ||
bd73a62d AM |
4973 | // Return the offset to use for the GOT_INDX'th got entry which is |
4974 | // for a local tls symbol specified by OBJECT, SYMNDX. | |
4975 | template<int size, bool big_endian> | |
4976 | int64_t | |
4977 | Target_powerpc<size, big_endian>::do_tls_offset_for_local( | |
4978 | const Relobj* object, | |
4979 | unsigned int symndx, | |
4980 | unsigned int got_indx) const | |
4981 | { | |
4982 | const Powerpc_relobj<size, big_endian>* ppc_object | |
4983 | = static_cast<const Powerpc_relobj<size, big_endian>*>(object); | |
4984 | if (ppc_object->local_symbol(symndx)->is_tls_symbol()) | |
4985 | { | |
4986 | for (Got_type got_type = GOT_TYPE_TLSGD; | |
4987 | got_type <= GOT_TYPE_TPREL; | |
4988 | got_type = Got_type(got_type + 1)) | |
4989 | if (ppc_object->local_has_got_offset(symndx, got_type)) | |
4990 | { | |
4991 | unsigned int off = ppc_object->local_got_offset(symndx, got_type); | |
4992 | if (got_type == GOT_TYPE_TLSGD) | |
4993 | off += size / 8; | |
4994 | if (off == got_indx * (size / 8)) | |
4995 | { | |
4996 | if (got_type == GOT_TYPE_TPREL) | |
4997 | return -tp_offset; | |
4998 | else | |
4999 | return -dtp_offset; | |
5000 | } | |
5001 | } | |
5002 | } | |
5003 | gold_unreachable(); | |
5004 | } | |
5005 | ||
5006 | // Return the offset to use for the GOT_INDX'th got entry which is | |
5007 | // for global tls symbol GSYM. | |
5008 | template<int size, bool big_endian> | |
5009 | int64_t | |
5010 | Target_powerpc<size, big_endian>::do_tls_offset_for_global( | |
5011 | Symbol* gsym, | |
5012 | unsigned int got_indx) const | |
5013 | { | |
5014 | if (gsym->type() == elfcpp::STT_TLS) | |
5015 | { | |
5016 | for (Got_type got_type = GOT_TYPE_TLSGD; | |
5017 | got_type <= GOT_TYPE_TPREL; | |
5018 | got_type = Got_type(got_type + 1)) | |
5019 | if (gsym->has_got_offset(got_type)) | |
5020 | { | |
5021 | unsigned int off = gsym->got_offset(got_type); | |
5022 | if (got_type == GOT_TYPE_TLSGD) | |
5023 | off += size / 8; | |
5024 | if (off == got_indx * (size / 8)) | |
5025 | { | |
5026 | if (got_type == GOT_TYPE_TPREL) | |
5027 | return -tp_offset; | |
5028 | else | |
5029 | return -dtp_offset; | |
5030 | } | |
5031 | } | |
5032 | } | |
5033 | gold_unreachable(); | |
5034 | } | |
5035 | ||
42cacb20 DE |
5036 | // The selector for powerpc object files. |
5037 | ||
5038 | template<int size, bool big_endian> | |
5039 | class Target_selector_powerpc : public Target_selector | |
5040 | { | |
5041 | public: | |
5042 | Target_selector_powerpc() | |
5043 | : Target_selector(elfcpp::EM_NONE, size, big_endian, | |
03ef7571 ILT |
5044 | (size == 64 |
5045 | ? (big_endian ? "elf64-powerpc" : "elf64-powerpcle") | |
5046 | : (big_endian ? "elf32-powerpc" : "elf32-powerpcle")), | |
5047 | (size == 64 | |
5048 | ? (big_endian ? "elf64ppc" : "elf64lppc") | |
5049 | : (big_endian ? "elf32ppc" : "elf32lppc"))) | |
42cacb20 DE |
5050 | { } |
5051 | ||
2e702c99 RM |
5052 | virtual Target* |
5053 | do_recognize(Input_file*, off_t, int machine, int, int) | |
42cacb20 DE |
5054 | { |
5055 | switch (size) | |
5056 | { | |
5057 | case 64: | |
2ea97941 | 5058 | if (machine != elfcpp::EM_PPC64) |
42cacb20 DE |
5059 | return NULL; |
5060 | break; | |
5061 | ||
5062 | case 32: | |
2ea97941 | 5063 | if (machine != elfcpp::EM_PPC) |
42cacb20 DE |
5064 | return NULL; |
5065 | break; | |
5066 | ||
5067 | default: | |
5068 | return NULL; | |
5069 | } | |
5070 | ||
7f055c20 | 5071 | return this->instantiate_target(); |
42cacb20 DE |
5072 | } |
5073 | ||
2e702c99 RM |
5074 | virtual Target* |
5075 | do_instantiate_target() | |
7f055c20 | 5076 | { return new Target_powerpc<size, big_endian>(); } |
42cacb20 DE |
5077 | }; |
5078 | ||
5079 | Target_selector_powerpc<32, true> target_selector_ppc32; | |
5080 | Target_selector_powerpc<32, false> target_selector_ppc32le; | |
5081 | Target_selector_powerpc<64, true> target_selector_ppc64; | |
5082 | Target_selector_powerpc<64, false> target_selector_ppc64le; | |
5083 | ||
5084 | } // End anonymous namespace. |