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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 | ||
c6de8ed4 AM |
157 | // Add a reference to the code section specified by the .opd entry |
158 | // at DST_OFF | |
159 | void | |
160 | add_gc_mark(typename elfcpp::Elf_types<size>::Elf_Addr dst_off) | |
161 | { | |
162 | size_t ndx = this->opd_ent_ndx(dst_off); | |
163 | if (ndx >= this->opd_ent_.size()) | |
164 | this->opd_ent_.resize(ndx + 1); | |
165 | this->opd_ent_[ndx].gc_mark = true; | |
166 | } | |
167 | ||
168 | void | |
169 | process_gc_mark(Symbol_table* symtab) | |
170 | { | |
171 | for (size_t i = 0; i < this->opd_ent_.size(); i++) | |
172 | if (this->opd_ent_[i].gc_mark) | |
173 | { | |
174 | unsigned int shndx = this->opd_ent_[i].shndx; | |
175 | symtab->gc()->worklist().push(Section_id(this, shndx)); | |
176 | } | |
177 | } | |
178 | ||
e81fea4d AM |
179 | bool |
180 | opd_valid() const | |
181 | { return this->opd_valid_; } | |
182 | ||
183 | void | |
184 | set_opd_valid() | |
185 | { this->opd_valid_ = true; } | |
186 | ||
c9269dff AM |
187 | // Examine .rela.opd to build info about function entry points. |
188 | void | |
189 | scan_opd_relocs(size_t reloc_count, | |
190 | const unsigned char* prelocs, | |
191 | const unsigned char* plocal_syms); | |
192 | ||
193 | void | |
194 | do_read_relocs(Read_relocs_data*); | |
195 | ||
cf43a2fe AM |
196 | bool |
197 | do_find_special_sections(Read_symbols_data* sd); | |
198 | ||
ec4dbad3 AM |
199 | // Adjust this local symbol value. Return false if the symbol |
200 | // should be discarded from the output file. | |
201 | bool | |
202 | do_adjust_local_symbol(Symbol_value<size>* lv) const | |
203 | { | |
204 | if (size == 64 && this->opd_shndx() != 0) | |
205 | { | |
206 | bool is_ordinary; | |
207 | if (lv->input_shndx(&is_ordinary) != this->opd_shndx()) | |
208 | return true; | |
209 | if (this->get_opd_discard(lv->input_value())) | |
210 | return false; | |
211 | } | |
212 | return true; | |
213 | } | |
214 | ||
dd93cd0a AM |
215 | // Return offset in output GOT section that this object will use |
216 | // as a TOC pointer. Won't be just a constant with multi-toc support. | |
217 | Address | |
218 | toc_base_offset() const | |
219 | { return 0x8000; } | |
220 | ||
cf43a2fe | 221 | private: |
bfdfa4cd AM |
222 | struct Opd_ent |
223 | { | |
224 | unsigned int shndx; | |
c6de8ed4 AM |
225 | bool discard : 1; |
226 | bool gc_mark : 1; | |
bfdfa4cd AM |
227 | Offset off; |
228 | }; | |
229 | ||
230 | // Return index into opd_ent_ array for .opd entry at OFF. | |
231 | // .opd entries are 24 bytes long, but they can be spaced 16 bytes | |
232 | // apart when the language doesn't use the last 8-byte word, the | |
233 | // environment pointer. Thus dividing the entry section offset by | |
234 | // 16 will give an index into opd_ent_ that works for either layout | |
235 | // of .opd. (It leaves some elements of the vector unused when .opd | |
236 | // entries are spaced 24 bytes apart, but we don't know the spacing | |
237 | // until relocations are processed, and in any case it is possible | |
238 | // for an object to have some entries spaced 16 bytes apart and | |
239 | // others 24 bytes apart.) | |
c9269dff AM |
240 | size_t |
241 | opd_ent_ndx(size_t off) const | |
242 | { return off >> 4;} | |
243 | ||
244 | // For 32-bit the .got2 section shdnx, for 64-bit the .opd section shndx. | |
245 | unsigned int special_; | |
bfdfa4cd AM |
246 | |
247 | // Set at the start of gc_process_relocs, when we know opd_ent_ | |
248 | // vector is valid. The flag could be made atomic and set in | |
249 | // do_read_relocs with memory_order_release and then tested with | |
250 | // memory_order_acquire, potentially resulting in fewer entries in | |
251 | // access_from_map_. | |
252 | bool opd_valid_; | |
253 | ||
c9269dff AM |
254 | // The first 8-byte word of an OPD entry gives the address of the |
255 | // entry point of the function. Relocatable object files have a | |
bfdfa4cd | 256 | // relocation on this word. The following vector records the |
c9269dff | 257 | // section and offset specified by these relocations. |
bfdfa4cd AM |
258 | std::vector<Opd_ent> opd_ent_; |
259 | ||
e81fea4d | 260 | // References made to this object's .opd section when running |
bfdfa4cd AM |
261 | // gc_process_relocs for another object, before the opd_ent_ vector |
262 | // is valid for this object. | |
e81fea4d | 263 | Access_from access_from_map_; |
cf43a2fe AM |
264 | }; |
265 | ||
42cacb20 DE |
266 | template<int size, bool big_endian> |
267 | class Target_powerpc : public Sized_target<size, big_endian> | |
268 | { | |
269 | public: | |
d83ce4e3 AM |
270 | typedef |
271 | Output_data_reloc<elfcpp::SHT_RELA, true, size, big_endian> Reloc_section; | |
c9269dff | 272 | typedef typename elfcpp::Elf_types<size>::Elf_Addr Address; |
dd93cd0a | 273 | typedef typename elfcpp::Elf_types<size>::Elf_Swxword Signed_address; |
c9269dff | 274 | static const Address invalid_address = static_cast<Address>(0) - 1; |
dd93cd0a AM |
275 | // Offset of tp and dtp pointers from start of TLS block. |
276 | static const Address tp_offset = 0x7000; | |
277 | static const Address dtp_offset = 0x8000; | |
42cacb20 DE |
278 | |
279 | Target_powerpc() | |
280 | : Sized_target<size, big_endian>(&powerpc_info), | |
e5d5f5ed | 281 | got_(NULL), plt_(NULL), iplt_(NULL), glink_(NULL), rela_dyn_(NULL), |
42cacb20 | 282 | copy_relocs_(elfcpp::R_POWERPC_COPY), |
dd93cd0a | 283 | dynbss_(NULL), tlsld_got_offset_(-1U) |
42cacb20 DE |
284 | { |
285 | } | |
286 | ||
2e702c99 | 287 | // Process the relocations to determine unreferenced sections for |
6d03d481 ST |
288 | // garbage collection. |
289 | void | |
ad0f2072 | 290 | gc_process_relocs(Symbol_table* symtab, |
2e702c99 RM |
291 | Layout* layout, |
292 | Sized_relobj_file<size, big_endian>* object, | |
293 | unsigned int data_shndx, | |
294 | unsigned int sh_type, | |
295 | const unsigned char* prelocs, | |
296 | size_t reloc_count, | |
297 | Output_section* output_section, | |
298 | bool needs_special_offset_handling, | |
299 | size_t local_symbol_count, | |
300 | const unsigned char* plocal_symbols); | |
6d03d481 | 301 | |
42cacb20 DE |
302 | // Scan the relocations to look for symbol adjustments. |
303 | void | |
ad0f2072 | 304 | scan_relocs(Symbol_table* symtab, |
42cacb20 | 305 | Layout* layout, |
6fa2a40b | 306 | Sized_relobj_file<size, big_endian>* object, |
42cacb20 DE |
307 | unsigned int data_shndx, |
308 | unsigned int sh_type, | |
309 | const unsigned char* prelocs, | |
310 | size_t reloc_count, | |
311 | Output_section* output_section, | |
312 | bool needs_special_offset_handling, | |
313 | size_t local_symbol_count, | |
314 | const unsigned char* plocal_symbols); | |
921b5322 AM |
315 | |
316 | // Map input .toc section to output .got section. | |
317 | const char* | |
318 | do_output_section_name(const Relobj*, const char* name, size_t* plen) const | |
319 | { | |
320 | if (size == 64 && strcmp(name, ".toc") == 0) | |
321 | { | |
322 | *plen = 4; | |
323 | return ".got"; | |
324 | } | |
325 | return NULL; | |
326 | } | |
327 | ||
42cacb20 DE |
328 | // Finalize the sections. |
329 | void | |
f59f41f3 | 330 | do_finalize_sections(Layout*, const Input_objects*, Symbol_table*); |
42cacb20 DE |
331 | |
332 | // Return the value to use for a dynamic which requires special | |
333 | // treatment. | |
334 | uint64_t | |
335 | do_dynsym_value(const Symbol*) const; | |
336 | ||
c9824451 AM |
337 | // Return the PLT address to use for a local symbol. |
338 | uint64_t | |
339 | do_plt_address_for_local(const Relobj*, unsigned int) const; | |
340 | ||
341 | // Return the PLT address to use for a global symbol. | |
342 | uint64_t | |
343 | do_plt_address_for_global(const Symbol*) const; | |
344 | ||
bd73a62d AM |
345 | // Return the offset to use for the GOT_INDX'th got entry which is |
346 | // for a local tls symbol specified by OBJECT, SYMNDX. | |
347 | int64_t | |
348 | do_tls_offset_for_local(const Relobj* object, | |
349 | unsigned int symndx, | |
350 | unsigned int got_indx) const; | |
351 | ||
352 | // Return the offset to use for the GOT_INDX'th got entry which is | |
353 | // for global tls symbol GSYM. | |
354 | int64_t | |
355 | do_tls_offset_for_global(Symbol* gsym, unsigned int got_indx) const; | |
356 | ||
42cacb20 DE |
357 | // Relocate a section. |
358 | void | |
359 | relocate_section(const Relocate_info<size, big_endian>*, | |
360 | unsigned int sh_type, | |
361 | const unsigned char* prelocs, | |
362 | size_t reloc_count, | |
363 | Output_section* output_section, | |
364 | bool needs_special_offset_handling, | |
365 | unsigned char* view, | |
c9269dff | 366 | Address view_address, |
364c7fa5 ILT |
367 | section_size_type view_size, |
368 | const Reloc_symbol_changes*); | |
42cacb20 DE |
369 | |
370 | // Scan the relocs during a relocatable link. | |
371 | void | |
ad0f2072 | 372 | scan_relocatable_relocs(Symbol_table* symtab, |
42cacb20 | 373 | Layout* layout, |
6fa2a40b | 374 | Sized_relobj_file<size, big_endian>* object, |
42cacb20 DE |
375 | unsigned int data_shndx, |
376 | unsigned int sh_type, | |
377 | const unsigned char* prelocs, | |
378 | size_t reloc_count, | |
379 | Output_section* output_section, | |
380 | bool needs_special_offset_handling, | |
381 | size_t local_symbol_count, | |
382 | const unsigned char* plocal_symbols, | |
383 | Relocatable_relocs*); | |
384 | ||
7404fe1b | 385 | // Emit relocations for a section. |
42cacb20 | 386 | void |
7404fe1b AM |
387 | relocate_relocs(const Relocate_info<size, big_endian>*, |
388 | unsigned int sh_type, | |
389 | const unsigned char* prelocs, | |
390 | size_t reloc_count, | |
391 | Output_section* output_section, | |
392 | off_t offset_in_output_section, | |
393 | const Relocatable_relocs*, | |
394 | unsigned char*, | |
395 | Address view_address, | |
396 | section_size_type, | |
397 | unsigned char* reloc_view, | |
398 | section_size_type reloc_view_size); | |
42cacb20 DE |
399 | |
400 | // Return whether SYM is defined by the ABI. | |
401 | bool | |
9c2d0ef9 | 402 | do_is_defined_by_abi(const Symbol* sym) const |
42cacb20 | 403 | { |
cf43a2fe | 404 | return strcmp(sym->name(), "__tls_get_addr") == 0; |
42cacb20 DE |
405 | } |
406 | ||
407 | // Return the size of the GOT section. | |
408 | section_size_type | |
0e70b911 | 409 | got_size() const |
42cacb20 DE |
410 | { |
411 | gold_assert(this->got_ != NULL); | |
412 | return this->got_->data_size(); | |
413 | } | |
414 | ||
cf43a2fe AM |
415 | // Get the PLT section. |
416 | const Output_data_plt_powerpc<size, big_endian>* | |
417 | plt_section() const | |
418 | { | |
419 | gold_assert(this->plt_ != NULL); | |
420 | return this->plt_; | |
421 | } | |
422 | ||
e5d5f5ed AM |
423 | // Get the IPLT section. |
424 | const Output_data_plt_powerpc<size, big_endian>* | |
425 | iplt_section() const | |
426 | { | |
427 | gold_assert(this->iplt_ != NULL); | |
428 | return this->iplt_; | |
429 | } | |
430 | ||
cf43a2fe AM |
431 | // Get the .glink section. |
432 | const Output_data_glink<size, big_endian>* | |
433 | glink_section() const | |
434 | { | |
435 | gold_assert(this->glink_ != NULL); | |
436 | return this->glink_; | |
437 | } | |
438 | ||
439 | // Get the GOT section. | |
440 | const Output_data_got_powerpc<size, big_endian>* | |
441 | got_section() const | |
442 | { | |
443 | gold_assert(this->got_ != NULL); | |
444 | return this->got_; | |
445 | } | |
446 | ||
cf43a2fe AM |
447 | Object* |
448 | do_make_elf_object(const std::string&, Input_file*, off_t, | |
449 | const elfcpp::Ehdr<size, big_endian>&); | |
450 | ||
0e70b911 CC |
451 | // Return the number of entries in the GOT. |
452 | unsigned int | |
453 | got_entry_count() const | |
454 | { | |
455 | if (this->got_ == NULL) | |
456 | return 0; | |
457 | return this->got_size() / (size / 8); | |
458 | } | |
459 | ||
460 | // Return the number of entries in the PLT. | |
461 | unsigned int | |
462 | plt_entry_count() const; | |
463 | ||
464 | // Return the offset of the first non-reserved PLT entry. | |
465 | unsigned int | |
466 | first_plt_entry_offset() const; | |
467 | ||
468 | // Return the size of each PLT entry. | |
469 | unsigned int | |
470 | plt_entry_size() const; | |
471 | ||
e81fea4d AM |
472 | // Add any special sections for this symbol to the gc work list. |
473 | // For powerpc64, this adds the code section of a function | |
474 | // descriptor. | |
475 | void | |
476 | do_gc_mark_symbol(Symbol_table* symtab, Symbol* sym) const; | |
477 | ||
478 | // Handle target specific gc actions when adding a gc reference from | |
479 | // SRC_OBJ, SRC_SHNDX to a location specified by DST_OBJ, DST_SHNDX | |
480 | // and DST_OFF. For powerpc64, this adds a referenc to the code | |
481 | // section of a function descriptor. | |
482 | void | |
483 | do_gc_add_reference(Symbol_table* symtab, | |
484 | Object* src_obj, | |
485 | unsigned int src_shndx, | |
486 | Object* dst_obj, | |
487 | unsigned int dst_shndx, | |
488 | Address dst_off) const; | |
489 | ||
42cacb20 DE |
490 | private: |
491 | ||
492 | // The class which scans relocations. | |
493 | class Scan | |
494 | { | |
495 | public: | |
bfdfa4cd AM |
496 | typedef typename elfcpp::Elf_types<size>::Elf_Addr Address; |
497 | ||
42cacb20 DE |
498 | Scan() |
499 | : issued_non_pic_error_(false) | |
500 | { } | |
501 | ||
95a2c8d6 RS |
502 | static inline int |
503 | get_reference_flags(unsigned int r_type); | |
504 | ||
42cacb20 | 505 | inline void |
ad0f2072 | 506 | local(Symbol_table* symtab, Layout* layout, Target_powerpc* target, |
6fa2a40b | 507 | Sized_relobj_file<size, big_endian>* object, |
42cacb20 DE |
508 | unsigned int data_shndx, |
509 | Output_section* output_section, | |
510 | const elfcpp::Rela<size, big_endian>& reloc, unsigned int r_type, | |
bfdfa4cd AM |
511 | const elfcpp::Sym<size, big_endian>& lsym, |
512 | bool is_discarded); | |
42cacb20 DE |
513 | |
514 | inline void | |
ad0f2072 | 515 | global(Symbol_table* symtab, Layout* layout, Target_powerpc* target, |
6fa2a40b | 516 | Sized_relobj_file<size, big_endian>* object, |
42cacb20 DE |
517 | unsigned int data_shndx, |
518 | Output_section* output_section, | |
519 | const elfcpp::Rela<size, big_endian>& reloc, unsigned int r_type, | |
520 | Symbol* gsym); | |
521 | ||
21bb3914 ST |
522 | inline bool |
523 | local_reloc_may_be_function_pointer(Symbol_table* , Layout* , | |
524 | Target_powerpc* , | |
2e702c99 | 525 | Sized_relobj_file<size, big_endian>* , |
21bb3914 | 526 | unsigned int , |
2e702c99 RM |
527 | Output_section* , |
528 | const elfcpp::Rela<size, big_endian>& , | |
529 | unsigned int , | |
530 | const elfcpp::Sym<size, big_endian>&) | |
21bb3914 ST |
531 | { return false; } |
532 | ||
533 | inline bool | |
534 | global_reloc_may_be_function_pointer(Symbol_table* , Layout* , | |
535 | Target_powerpc* , | |
2e702c99 RM |
536 | Sized_relobj_file<size, big_endian>* , |
537 | unsigned int , | |
538 | Output_section* , | |
539 | const elfcpp::Rela<size, | |
21bb3914 ST |
540 | big_endian>& , |
541 | unsigned int , Symbol*) | |
542 | { return false; } | |
543 | ||
42cacb20 DE |
544 | private: |
545 | static void | |
6fa2a40b | 546 | unsupported_reloc_local(Sized_relobj_file<size, big_endian>*, |
42cacb20 DE |
547 | unsigned int r_type); |
548 | ||
549 | static void | |
6fa2a40b | 550 | unsupported_reloc_global(Sized_relobj_file<size, big_endian>*, |
42cacb20 DE |
551 | unsigned int r_type, Symbol*); |
552 | ||
553 | static void | |
554 | generate_tls_call(Symbol_table* symtab, Layout* layout, | |
555 | Target_powerpc* target); | |
556 | ||
557 | void | |
558 | check_non_pic(Relobj*, unsigned int r_type); | |
559 | ||
e5d5f5ed AM |
560 | bool |
561 | reloc_needs_plt_for_ifunc(Sized_relobj_file<size, big_endian>* object, | |
562 | unsigned int r_type); | |
563 | ||
42cacb20 DE |
564 | // Whether we have issued an error about a non-PIC compilation. |
565 | bool issued_non_pic_error_; | |
566 | }; | |
567 | ||
3ea0a085 AM |
568 | Address |
569 | symval_for_branch(Address value, const Sized_symbol<size>* gsym, | |
570 | Powerpc_relobj<size, big_endian>* object, | |
571 | unsigned int *dest_shndx); | |
572 | ||
42cacb20 DE |
573 | // The class which implements relocation. |
574 | class Relocate | |
575 | { | |
576 | public: | |
dd93cd0a AM |
577 | // Use 'at' branch hints when true, 'y' when false. |
578 | // FIXME maybe: set this with an option. | |
579 | static const bool is_isa_v2 = true; | |
580 | ||
581 | enum skip_tls | |
582 | { | |
583 | CALL_NOT_EXPECTED = 0, | |
584 | CALL_EXPECTED = 1, | |
585 | CALL_SKIP = 2 | |
586 | }; | |
587 | ||
588 | Relocate() | |
589 | : call_tls_get_addr_(CALL_NOT_EXPECTED) | |
590 | { } | |
591 | ||
592 | ~Relocate() | |
593 | { | |
594 | if (this->call_tls_get_addr_ != CALL_NOT_EXPECTED) | |
595 | { | |
596 | // FIXME: This needs to specify the location somehow. | |
597 | gold_error(_("missing expected __tls_get_addr call")); | |
598 | } | |
599 | } | |
600 | ||
42cacb20 DE |
601 | // Do a relocation. Return false if the caller should not issue |
602 | // any warnings about this relocation. | |
603 | inline bool | |
604 | relocate(const Relocate_info<size, big_endian>*, Target_powerpc*, | |
031cdbed ILT |
605 | Output_section*, size_t relnum, |
606 | const elfcpp::Rela<size, big_endian>&, | |
42cacb20 DE |
607 | unsigned int r_type, const Sized_symbol<size>*, |
608 | const Symbol_value<size>*, | |
609 | unsigned char*, | |
610 | typename elfcpp::Elf_types<size>::Elf_Addr, | |
611 | section_size_type); | |
612 | ||
dd93cd0a AM |
613 | // This is set if we should skip the next reloc, which should be a |
614 | // call to __tls_get_addr. | |
615 | enum skip_tls call_tls_get_addr_; | |
42cacb20 DE |
616 | }; |
617 | ||
618 | // A class which returns the size required for a relocation type, | |
619 | // used while scanning relocs during a relocatable link. | |
620 | class Relocatable_size_for_reloc | |
621 | { | |
622 | public: | |
623 | unsigned int | |
cf43a2fe AM |
624 | get_size_for_reloc(unsigned int, Relobj*) |
625 | { | |
626 | gold_unreachable(); | |
627 | return 0; | |
628 | } | |
42cacb20 DE |
629 | }; |
630 | ||
dd93cd0a AM |
631 | // Optimize the TLS relocation type based on what we know about the |
632 | // symbol. IS_FINAL is true if the final address of this symbol is | |
633 | // known at link time. | |
634 | ||
635 | tls::Tls_optimization | |
636 | optimize_tls_gd(bool is_final) | |
637 | { | |
638 | // If we are generating a shared library, then we can't do anything | |
639 | // in the linker. | |
640 | if (parameters->options().shared()) | |
641 | return tls::TLSOPT_NONE; | |
642 | ||
643 | if (!is_final) | |
644 | return tls::TLSOPT_TO_IE; | |
645 | return tls::TLSOPT_TO_LE; | |
646 | } | |
647 | ||
648 | tls::Tls_optimization | |
649 | optimize_tls_ld() | |
650 | { | |
651 | if (parameters->options().shared()) | |
652 | return tls::TLSOPT_NONE; | |
653 | ||
654 | return tls::TLSOPT_TO_LE; | |
655 | } | |
656 | ||
657 | tls::Tls_optimization | |
658 | optimize_tls_ie(bool is_final) | |
659 | { | |
660 | if (!is_final || parameters->options().shared()) | |
661 | return tls::TLSOPT_NONE; | |
662 | ||
663 | return tls::TLSOPT_TO_LE; | |
664 | } | |
cf43a2fe | 665 | |
42cacb20 | 666 | // Get the GOT section, creating it if necessary. |
cf43a2fe | 667 | Output_data_got_powerpc<size, big_endian>* |
42cacb20 DE |
668 | got_section(Symbol_table*, Layout*); |
669 | ||
cf43a2fe AM |
670 | // Create glink. |
671 | void | |
672 | make_glink_section(Layout*); | |
42cacb20 | 673 | |
cf43a2fe AM |
674 | // Create the PLT section. |
675 | void | |
676 | make_plt_section(Layout*); | |
42cacb20 | 677 | |
e5d5f5ed | 678 | void |
c9824451 | 679 | make_iplt_section(Layout*); |
e5d5f5ed | 680 | |
42cacb20 DE |
681 | // Create a PLT entry for a global symbol. |
682 | void | |
c9824451 | 683 | make_plt_entry(Layout*, Symbol*, |
cf43a2fe | 684 | const elfcpp::Rela<size, big_endian>&, |
e5d5f5ed AM |
685 | const Sized_relobj_file<size, big_endian>* object); |
686 | ||
687 | // Create a PLT entry for a local IFUNC symbol. | |
688 | void | |
c9824451 | 689 | make_local_ifunc_plt_entry(Layout*, |
e5d5f5ed AM |
690 | const elfcpp::Rela<size, big_endian>&, |
691 | Sized_relobj_file<size, big_endian>*); | |
42cacb20 | 692 | |
dd93cd0a AM |
693 | // Create a GOT entry for local dynamic __tls_get_addr. |
694 | unsigned int | |
695 | tlsld_got_offset(Symbol_table* symtab, Layout* layout, | |
696 | Sized_relobj_file<size, big_endian>* object); | |
697 | ||
42cacb20 | 698 | unsigned int |
dd93cd0a AM |
699 | tlsld_got_offset() const |
700 | { | |
701 | return this->tlsld_got_offset_; | |
702 | } | |
42cacb20 | 703 | |
42cacb20 DE |
704 | // Get the dynamic reloc section, creating it if necessary. |
705 | Reloc_section* | |
706 | rela_dyn_section(Layout*); | |
707 | ||
42cacb20 DE |
708 | // Copy a relocation against a global symbol. |
709 | void | |
ef9beddf | 710 | copy_reloc(Symbol_table* symtab, Layout* layout, |
2e702c99 | 711 | Sized_relobj_file<size, big_endian>* object, |
42cacb20 DE |
712 | unsigned int shndx, Output_section* output_section, |
713 | Symbol* sym, const elfcpp::Rela<size, big_endian>& reloc) | |
714 | { | |
715 | this->copy_relocs_.copy_reloc(symtab, layout, | |
716 | symtab->get_sized_symbol<size>(sym), | |
717 | object, shndx, output_section, | |
718 | reloc, this->rela_dyn_section(layout)); | |
719 | } | |
720 | ||
721 | // Information about this specific target which we pass to the | |
722 | // general Target structure. | |
723 | static Target::Target_info powerpc_info; | |
724 | ||
725 | // The types of GOT entries needed for this platform. | |
0e70b911 CC |
726 | // These values are exposed to the ABI in an incremental link. |
727 | // Do not renumber existing values without changing the version | |
728 | // number of the .gnu_incremental_inputs section. | |
42cacb20 DE |
729 | enum Got_type |
730 | { | |
dd93cd0a AM |
731 | GOT_TYPE_STANDARD, |
732 | GOT_TYPE_TLSGD, // double entry for @got@tlsgd | |
733 | GOT_TYPE_DTPREL, // entry for @got@dtprel | |
734 | GOT_TYPE_TPREL // entry for @got@tprel | |
42cacb20 DE |
735 | }; |
736 | ||
cf43a2fe AM |
737 | // The GOT output section. |
738 | Output_data_got_powerpc<size, big_endian>* got_; | |
739 | // The PLT output section. | |
42cacb20 | 740 | Output_data_plt_powerpc<size, big_endian>* plt_; |
e5d5f5ed AM |
741 | // The IPLT output section. |
742 | Output_data_plt_powerpc<size, big_endian>* iplt_; | |
cf43a2fe AM |
743 | // The .glink output section. |
744 | Output_data_glink<size, big_endian>* glink_; | |
745 | // The dynamic reloc output section. | |
42cacb20 DE |
746 | Reloc_section* rela_dyn_; |
747 | // Relocs saved to avoid a COPY reloc. | |
748 | Copy_relocs<elfcpp::SHT_RELA, size, big_endian> copy_relocs_; | |
749 | // Space for variables copied with a COPY reloc. | |
750 | Output_data_space* dynbss_; | |
dd93cd0a AM |
751 | // Offset of the GOT entry for local dynamic __tls_get_addr calls. |
752 | unsigned int tlsld_got_offset_; | |
42cacb20 DE |
753 | }; |
754 | ||
755 | template<> | |
756 | Target::Target_info Target_powerpc<32, true>::powerpc_info = | |
757 | { | |
758 | 32, // size | |
759 | true, // is_big_endian | |
760 | elfcpp::EM_PPC, // machine_code | |
761 | false, // has_make_symbol | |
762 | false, // has_resolve | |
763 | false, // has_code_fill | |
764 | true, // is_default_stack_executable | |
b3ce541e | 765 | false, // can_icf_inline_merge_sections |
42cacb20 DE |
766 | '\0', // wrap_char |
767 | "/usr/lib/ld.so.1", // dynamic_linker | |
768 | 0x10000000, // default_text_segment_address | |
769 | 64 * 1024, // abi_pagesize (overridable by -z max-page-size) | |
8a5e3e08 | 770 | 4 * 1024, // common_pagesize (overridable by -z common-page-size) |
c9269dff AM |
771 | false, // isolate_execinstr |
772 | 0, // rosegment_gap | |
8a5e3e08 ILT |
773 | elfcpp::SHN_UNDEF, // small_common_shndx |
774 | elfcpp::SHN_UNDEF, // large_common_shndx | |
775 | 0, // small_common_section_flags | |
05a352e6 DK |
776 | 0, // large_common_section_flags |
777 | NULL, // attributes_section | |
778 | NULL // attributes_vendor | |
42cacb20 DE |
779 | }; |
780 | ||
781 | template<> | |
782 | Target::Target_info Target_powerpc<32, false>::powerpc_info = | |
783 | { | |
784 | 32, // size | |
785 | false, // is_big_endian | |
786 | elfcpp::EM_PPC, // machine_code | |
787 | false, // has_make_symbol | |
788 | false, // has_resolve | |
789 | false, // has_code_fill | |
790 | true, // is_default_stack_executable | |
b3ce541e | 791 | false, // can_icf_inline_merge_sections |
42cacb20 DE |
792 | '\0', // wrap_char |
793 | "/usr/lib/ld.so.1", // dynamic_linker | |
794 | 0x10000000, // default_text_segment_address | |
795 | 64 * 1024, // abi_pagesize (overridable by -z max-page-size) | |
8a5e3e08 | 796 | 4 * 1024, // common_pagesize (overridable by -z common-page-size) |
c9269dff AM |
797 | false, // isolate_execinstr |
798 | 0, // rosegment_gap | |
8a5e3e08 ILT |
799 | elfcpp::SHN_UNDEF, // small_common_shndx |
800 | elfcpp::SHN_UNDEF, // large_common_shndx | |
801 | 0, // small_common_section_flags | |
05a352e6 DK |
802 | 0, // large_common_section_flags |
803 | NULL, // attributes_section | |
804 | NULL // attributes_vendor | |
42cacb20 DE |
805 | }; |
806 | ||
807 | template<> | |
808 | Target::Target_info Target_powerpc<64, true>::powerpc_info = | |
809 | { | |
810 | 64, // size | |
811 | true, // is_big_endian | |
812 | elfcpp::EM_PPC64, // machine_code | |
813 | false, // has_make_symbol | |
814 | false, // has_resolve | |
815 | false, // has_code_fill | |
816 | true, // is_default_stack_executable | |
b3ce541e | 817 | false, // can_icf_inline_merge_sections |
42cacb20 DE |
818 | '\0', // wrap_char |
819 | "/usr/lib/ld.so.1", // dynamic_linker | |
820 | 0x10000000, // default_text_segment_address | |
821 | 64 * 1024, // abi_pagesize (overridable by -z max-page-size) | |
dd93cd0a | 822 | 4 * 1024, // common_pagesize (overridable by -z common-page-size) |
c9269dff AM |
823 | false, // isolate_execinstr |
824 | 0, // rosegment_gap | |
8a5e3e08 ILT |
825 | elfcpp::SHN_UNDEF, // small_common_shndx |
826 | elfcpp::SHN_UNDEF, // large_common_shndx | |
827 | 0, // small_common_section_flags | |
05a352e6 DK |
828 | 0, // large_common_section_flags |
829 | NULL, // attributes_section | |
830 | NULL // attributes_vendor | |
42cacb20 DE |
831 | }; |
832 | ||
833 | template<> | |
834 | Target::Target_info Target_powerpc<64, false>::powerpc_info = | |
835 | { | |
836 | 64, // size | |
837 | false, // is_big_endian | |
838 | elfcpp::EM_PPC64, // machine_code | |
839 | false, // has_make_symbol | |
840 | false, // has_resolve | |
841 | false, // has_code_fill | |
842 | true, // is_default_stack_executable | |
b3ce541e | 843 | false, // can_icf_inline_merge_sections |
42cacb20 DE |
844 | '\0', // wrap_char |
845 | "/usr/lib/ld.so.1", // dynamic_linker | |
846 | 0x10000000, // default_text_segment_address | |
847 | 64 * 1024, // abi_pagesize (overridable by -z max-page-size) | |
dd93cd0a | 848 | 4 * 1024, // common_pagesize (overridable by -z common-page-size) |
c9269dff AM |
849 | false, // isolate_execinstr |
850 | 0, // rosegment_gap | |
8a5e3e08 ILT |
851 | elfcpp::SHN_UNDEF, // small_common_shndx |
852 | elfcpp::SHN_UNDEF, // large_common_shndx | |
853 | 0, // small_common_section_flags | |
05a352e6 DK |
854 | 0, // large_common_section_flags |
855 | NULL, // attributes_section | |
856 | NULL // attributes_vendor | |
42cacb20 DE |
857 | }; |
858 | ||
dd93cd0a AM |
859 | inline bool |
860 | is_branch_reloc(unsigned int r_type) | |
861 | { | |
862 | return (r_type == elfcpp::R_POWERPC_REL24 | |
863 | || r_type == elfcpp::R_PPC_PLTREL24 | |
864 | || r_type == elfcpp::R_PPC_LOCAL24PC | |
865 | || r_type == elfcpp::R_POWERPC_REL14 | |
866 | || r_type == elfcpp::R_POWERPC_REL14_BRTAKEN | |
867 | || r_type == elfcpp::R_POWERPC_REL14_BRNTAKEN | |
868 | || r_type == elfcpp::R_POWERPC_ADDR24 | |
869 | || r_type == elfcpp::R_POWERPC_ADDR14 | |
870 | || r_type == elfcpp::R_POWERPC_ADDR14_BRTAKEN | |
871 | || r_type == elfcpp::R_POWERPC_ADDR14_BRNTAKEN); | |
872 | } | |
873 | ||
874 | // If INSN is an opcode that may be used with an @tls operand, return | |
875 | // the transformed insn for TLS optimisation, otherwise return 0. If | |
876 | // REG is non-zero only match an insn with RB or RA equal to REG. | |
877 | uint32_t | |
878 | at_tls_transform(uint32_t insn, unsigned int reg) | |
879 | { | |
880 | if ((insn & (0x3f << 26)) != 31 << 26) | |
881 | return 0; | |
882 | ||
883 | unsigned int rtra; | |
884 | if (reg == 0 || ((insn >> 11) & 0x1f) == reg) | |
885 | rtra = insn & ((1 << 26) - (1 << 16)); | |
886 | else if (((insn >> 16) & 0x1f) == reg) | |
887 | rtra = (insn & (0x1f << 21)) | ((insn & (0x1f << 11)) << 5); | |
888 | else | |
889 | return 0; | |
890 | ||
891 | if ((insn & (0x3ff << 1)) == 266 << 1) | |
892 | // add -> addi | |
893 | insn = 14 << 26; | |
894 | else if ((insn & (0x1f << 1)) == 23 << 1 | |
895 | && ((insn & (0x1f << 6)) < 14 << 6 | |
896 | || ((insn & (0x1f << 6)) >= 16 << 6 | |
897 | && (insn & (0x1f << 6)) < 24 << 6))) | |
898 | // load and store indexed -> dform | |
899 | insn = (32 | ((insn >> 6) & 0x1f)) << 26; | |
900 | else if ((insn & (((0x1a << 5) | 0x1f) << 1)) == 21 << 1) | |
901 | // ldx, ldux, stdx, stdux -> ld, ldu, std, stdu | |
902 | insn = ((58 | ((insn >> 6) & 4)) << 26) | ((insn >> 6) & 1); | |
903 | else if ((insn & (((0x1f << 5) | 0x1f) << 1)) == 341 << 1) | |
904 | // lwax -> lwa | |
905 | insn = (58 << 26) | 2; | |
906 | else | |
907 | return 0; | |
908 | insn |= rtra; | |
909 | return insn; | |
910 | } | |
911 | ||
912 | // Modified version of symtab.h class Symbol member | |
913 | // Given a direct absolute or pc-relative static relocation against | |
914 | // the global symbol, this function returns whether a dynamic relocation | |
915 | // is needed. | |
916 | ||
917 | template<int size> | |
918 | bool | |
919 | needs_dynamic_reloc(const Symbol* gsym, int flags) | |
920 | { | |
921 | // No dynamic relocations in a static link! | |
922 | if (parameters->doing_static_link()) | |
923 | return false; | |
924 | ||
925 | // A reference to an undefined symbol from an executable should be | |
926 | // statically resolved to 0, and does not need a dynamic relocation. | |
927 | // This matches gnu ld behavior. | |
928 | if (gsym->is_undefined() && !parameters->options().shared()) | |
929 | return false; | |
930 | ||
931 | // A reference to an absolute symbol does not need a dynamic relocation. | |
932 | if (gsym->is_absolute()) | |
933 | return false; | |
934 | ||
935 | // An absolute reference within a position-independent output file | |
936 | // will need a dynamic relocation. | |
937 | if ((flags & Symbol::ABSOLUTE_REF) | |
938 | && parameters->options().output_is_position_independent()) | |
939 | return true; | |
940 | ||
941 | // A function call that can branch to a local PLT entry does not need | |
942 | // a dynamic relocation. | |
943 | if ((flags & Symbol::FUNCTION_CALL) && gsym->has_plt_offset()) | |
944 | return false; | |
945 | ||
946 | // A reference to any PLT entry in a non-position-independent executable | |
947 | // does not need a dynamic relocation. | |
948 | // Except due to having function descriptors on powerpc64 we don't define | |
949 | // functions to their plt code in an executable, so this doesn't apply. | |
950 | if (size == 32 | |
951 | && !parameters->options().output_is_position_independent() | |
952 | && gsym->has_plt_offset()) | |
953 | return false; | |
954 | ||
955 | // A reference to a symbol defined in a dynamic object or to a | |
956 | // symbol that is preemptible will need a dynamic relocation. | |
957 | if (gsym->is_from_dynobj() | |
958 | || gsym->is_undefined() | |
959 | || gsym->is_preemptible()) | |
960 | return true; | |
961 | ||
962 | // For all other cases, return FALSE. | |
963 | return false; | |
964 | } | |
965 | ||
966 | // Modified version of symtab.h class Symbol member | |
967 | // Whether we should use the PLT offset associated with a symbol for | |
968 | // a relocation. FLAGS is a set of Reference_flags. | |
969 | ||
970 | template<int size> | |
971 | bool | |
972 | use_plt_offset(const Symbol* gsym, int flags) | |
973 | { | |
974 | // If the symbol doesn't have a PLT offset, then naturally we | |
975 | // don't want to use it. | |
976 | if (!gsym->has_plt_offset()) | |
977 | return false; | |
978 | ||
979 | // For a STT_GNU_IFUNC symbol we always have to use the PLT entry. | |
980 | if (gsym->type() == elfcpp::STT_GNU_IFUNC) | |
981 | return true; | |
982 | ||
983 | // If we are going to generate a dynamic relocation, then we will | |
984 | // wind up using that, so no need to use the PLT entry. | |
985 | if (needs_dynamic_reloc<size>(gsym, flags)) | |
986 | return false; | |
987 | ||
988 | // If the symbol is from a dynamic object, we need to use the PLT | |
989 | // entry. | |
990 | if (gsym->is_from_dynobj()) | |
991 | return true; | |
992 | ||
993 | // If we are generating a shared object, and gsym symbol is | |
994 | // undefined or preemptible, we need to use the PLT entry. | |
995 | if (parameters->options().shared() | |
996 | && (gsym->is_undefined() || gsym->is_preemptible())) | |
997 | return true; | |
998 | ||
999 | // If gsym is a call to a weak undefined symbol, we need to use | |
1000 | // the PLT entry; the symbol may be defined by a library loaded | |
1001 | // at runtime. | |
1002 | if ((flags & Symbol::FUNCTION_CALL) && gsym->is_weak_undefined()) | |
1003 | return true; | |
1004 | ||
1005 | // Otherwise we can use the regular definition. | |
1006 | return false; | |
1007 | } | |
1008 | ||
42cacb20 DE |
1009 | template<int size, bool big_endian> |
1010 | class Powerpc_relocate_functions | |
1011 | { | |
dd93cd0a | 1012 | public: |
f4baf0d4 | 1013 | enum Overflow_check |
dd93cd0a | 1014 | { |
f4baf0d4 AM |
1015 | CHECK_NONE, |
1016 | CHECK_SIGNED, | |
1017 | CHECK_BITFIELD | |
dd93cd0a AM |
1018 | }; |
1019 | ||
f4baf0d4 | 1020 | enum Status |
dd93cd0a | 1021 | { |
f4baf0d4 AM |
1022 | STATUS_OK, |
1023 | STATUS_OVERFLOW | |
1024 | }; | |
dd93cd0a | 1025 | |
42cacb20 | 1026 | private: |
c9269dff | 1027 | typedef Powerpc_relocate_functions<size, big_endian> This; |
c9269dff AM |
1028 | typedef typename elfcpp::Elf_types<size>::Elf_Addr Address; |
1029 | ||
dd93cd0a AM |
1030 | template<int valsize> |
1031 | static inline bool | |
1032 | has_overflow_signed(Address value) | |
1033 | { | |
1034 | // limit = 1 << (valsize - 1) without shift count exceeding size of type | |
1035 | Address limit = static_cast<Address>(1) << ((valsize - 1) >> 1); | |
1036 | limit <<= ((valsize - 1) >> 1); | |
1037 | limit <<= ((valsize - 1) - 2 * ((valsize - 1) >> 1)); | |
1038 | return value + limit > (limit << 1) - 1; | |
1039 | } | |
1040 | ||
1041 | template<int valsize> | |
1042 | static inline bool | |
1043 | has_overflow_bitfield(Address value) | |
1044 | { | |
1045 | Address limit = static_cast<Address>(1) << ((valsize - 1) >> 1); | |
1046 | limit <<= ((valsize - 1) >> 1); | |
1047 | limit <<= ((valsize - 1) - 2 * ((valsize - 1) >> 1)); | |
1048 | return value > (limit << 1) - 1 && value + limit > (limit << 1) - 1; | |
1049 | } | |
1050 | ||
1051 | template<int valsize> | |
f4baf0d4 AM |
1052 | static inline Status |
1053 | overflowed(Address value, Overflow_check overflow) | |
dd93cd0a | 1054 | { |
f4baf0d4 | 1055 | if (overflow == CHECK_SIGNED) |
dd93cd0a AM |
1056 | { |
1057 | if (has_overflow_signed<valsize>(value)) | |
f4baf0d4 | 1058 | return STATUS_OVERFLOW; |
dd93cd0a | 1059 | } |
f4baf0d4 | 1060 | else if (overflow == CHECK_BITFIELD) |
dd93cd0a AM |
1061 | { |
1062 | if (has_overflow_bitfield<valsize>(value)) | |
f4baf0d4 | 1063 | return STATUS_OVERFLOW; |
dd93cd0a | 1064 | } |
f4baf0d4 | 1065 | return STATUS_OK; |
dd93cd0a AM |
1066 | } |
1067 | ||
cf43a2fe | 1068 | // Do a simple RELA relocation |
42cacb20 | 1069 | template<int valsize> |
f4baf0d4 AM |
1070 | static inline Status |
1071 | rela(unsigned char* view, Address value, Overflow_check overflow) | |
dd93cd0a AM |
1072 | { |
1073 | typedef typename elfcpp::Swap<valsize, big_endian>::Valtype Valtype; | |
1074 | Valtype* wv = reinterpret_cast<Valtype*>(view); | |
1075 | elfcpp::Swap<valsize, big_endian>::writeval(wv, value); | |
1076 | return overflowed<valsize>(value, overflow); | |
1077 | } | |
1078 | ||
1079 | template<int valsize> | |
f4baf0d4 | 1080 | static inline Status |
42cacb20 DE |
1081 | rela(unsigned char* view, |
1082 | unsigned int right_shift, | |
c9269dff AM |
1083 | typename elfcpp::Valtype_base<valsize>::Valtype dst_mask, |
1084 | Address value, | |
f4baf0d4 | 1085 | Overflow_check overflow) |
42cacb20 DE |
1086 | { |
1087 | typedef typename elfcpp::Swap<valsize, big_endian>::Valtype Valtype; | |
1088 | Valtype* wv = reinterpret_cast<Valtype*>(view); | |
1089 | Valtype val = elfcpp::Swap<valsize, big_endian>::readval(wv); | |
dd93cd0a | 1090 | Valtype reloc = value >> right_shift; |
42cacb20 DE |
1091 | val &= ~dst_mask; |
1092 | reloc &= dst_mask; | |
42cacb20 | 1093 | elfcpp::Swap<valsize, big_endian>::writeval(wv, val | reloc); |
dd93cd0a | 1094 | return overflowed<valsize>(value >> right_shift, overflow); |
42cacb20 DE |
1095 | } |
1096 | ||
cf43a2fe | 1097 | // Do a simple RELA relocation, unaligned. |
42cacb20 | 1098 | template<int valsize> |
f4baf0d4 AM |
1099 | static inline Status |
1100 | rela_ua(unsigned char* view, Address value, Overflow_check overflow) | |
dd93cd0a AM |
1101 | { |
1102 | elfcpp::Swap_unaligned<valsize, big_endian>::writeval(view, value); | |
1103 | return overflowed<valsize>(value, overflow); | |
1104 | } | |
1105 | ||
1106 | template<int valsize> | |
f4baf0d4 | 1107 | static inline Status |
cf43a2fe AM |
1108 | rela_ua(unsigned char* view, |
1109 | unsigned int right_shift, | |
c9269dff AM |
1110 | typename elfcpp::Valtype_base<valsize>::Valtype dst_mask, |
1111 | Address value, | |
f4baf0d4 | 1112 | Overflow_check overflow) |
42cacb20 | 1113 | { |
c9269dff AM |
1114 | typedef typename elfcpp::Swap_unaligned<valsize, big_endian>::Valtype |
1115 | Valtype; | |
dd93cd0a AM |
1116 | Valtype val = elfcpp::Swap<valsize, big_endian>::readval(view); |
1117 | Valtype reloc = value >> right_shift; | |
42cacb20 DE |
1118 | val &= ~dst_mask; |
1119 | reloc &= dst_mask; | |
dd93cd0a AM |
1120 | elfcpp::Swap_unaligned<valsize, big_endian>::writeval(view, val | reloc); |
1121 | return overflowed<valsize>(value >> right_shift, overflow); | |
42cacb20 DE |
1122 | } |
1123 | ||
42cacb20 | 1124 | public: |
dd93cd0a | 1125 | // R_PPC64_ADDR64: (Symbol + Addend) |
42cacb20 | 1126 | static inline void |
dd93cd0a | 1127 | addr64(unsigned char* view, Address value) |
f4baf0d4 | 1128 | { This::template rela<64>(view, value, CHECK_NONE); } |
42cacb20 | 1129 | |
dd93cd0a | 1130 | // R_PPC64_UADDR64: (Symbol + Addend) unaligned |
42cacb20 | 1131 | static inline void |
dd93cd0a | 1132 | addr64_u(unsigned char* view, Address value) |
f4baf0d4 | 1133 | { This::template rela_ua<64>(view, value, CHECK_NONE); } |
dd93cd0a AM |
1134 | |
1135 | // R_POWERPC_ADDR32: (Symbol + Addend) | |
f4baf0d4 AM |
1136 | static inline Status |
1137 | addr32(unsigned char* view, Address value, Overflow_check overflow) | |
dd93cd0a AM |
1138 | { return This::template rela<32>(view, value, overflow); } |
1139 | ||
1140 | // R_POWERPC_UADDR32: (Symbol + Addend) unaligned | |
f4baf0d4 AM |
1141 | static inline Status |
1142 | addr32_u(unsigned char* view, Address value, Overflow_check overflow) | |
dd93cd0a AM |
1143 | { return This::template rela_ua<32>(view, value, overflow); } |
1144 | ||
1145 | // R_POWERPC_ADDR24: (Symbol + Addend) & 0x3fffffc | |
f4baf0d4 AM |
1146 | static inline Status |
1147 | addr24(unsigned char* view, Address value, Overflow_check overflow) | |
dd93cd0a | 1148 | { |
f4baf0d4 AM |
1149 | Status stat = This::template rela<32>(view, 0, 0x03fffffc, value, overflow); |
1150 | if (overflow != CHECK_NONE && (value & 3) != 0) | |
1151 | stat = STATUS_OVERFLOW; | |
dd93cd0a AM |
1152 | return stat; |
1153 | } | |
42cacb20 DE |
1154 | |
1155 | // R_POWERPC_ADDR16: (Symbol + Addend) & 0xffff | |
f4baf0d4 AM |
1156 | static inline Status |
1157 | addr16(unsigned char* view, Address value, Overflow_check overflow) | |
dd93cd0a | 1158 | { return This::template rela<16>(view, value, overflow); } |
42cacb20 | 1159 | |
dd93cd0a | 1160 | // R_POWERPC_ADDR16: (Symbol + Addend) & 0xffff, unaligned |
f4baf0d4 AM |
1161 | static inline Status |
1162 | addr16_u(unsigned char* view, Address value, Overflow_check overflow) | |
dd93cd0a | 1163 | { return This::template rela_ua<16>(view, value, overflow); } |
42cacb20 | 1164 | |
dd93cd0a | 1165 | // R_POWERPC_ADDR16_DS: (Symbol + Addend) & 0xfffc |
f4baf0d4 AM |
1166 | static inline Status |
1167 | addr16_ds(unsigned char* view, Address value, Overflow_check overflow) | |
dd93cd0a | 1168 | { |
f4baf0d4 AM |
1169 | Status stat = This::template rela<16>(view, 0, 0xfffc, value, overflow); |
1170 | if (overflow != CHECK_NONE && (value & 3) != 0) | |
1171 | stat = STATUS_OVERFLOW; | |
dd93cd0a AM |
1172 | return stat; |
1173 | } | |
42cacb20 | 1174 | |
42cacb20 DE |
1175 | // R_POWERPC_ADDR16_HI: ((Symbol + Addend) >> 16) & 0xffff |
1176 | static inline void | |
dd93cd0a | 1177 | addr16_hi(unsigned char* view, Address value) |
f4baf0d4 | 1178 | { This::template rela<16>(view, 16, 0xffff, value, CHECK_NONE); } |
42cacb20 | 1179 | |
c9269dff | 1180 | // R_POWERPC_ADDR16_HA: ((Symbol + Addend + 0x8000) >> 16) & 0xffff |
42cacb20 | 1181 | static inline void |
dd93cd0a AM |
1182 | addr16_ha(unsigned char* view, Address value) |
1183 | { This::addr16_hi(view, value + 0x8000); } | |
42cacb20 | 1184 | |
dd93cd0a | 1185 | // R_POWERPC_ADDR16_HIGHER: ((Symbol + Addend) >> 32) & 0xffff |
42cacb20 | 1186 | static inline void |
dd93cd0a | 1187 | addr16_hi2(unsigned char* view, Address value) |
f4baf0d4 | 1188 | { This::template rela<16>(view, 32, 0xffff, value, CHECK_NONE); } |
42cacb20 | 1189 | |
dd93cd0a | 1190 | // R_POWERPC_ADDR16_HIGHERA: ((Symbol + Addend + 0x8000) >> 32) & 0xffff |
42cacb20 | 1191 | static inline void |
dd93cd0a AM |
1192 | addr16_ha2(unsigned char* view, Address value) |
1193 | { This::addr16_hi2(view, value + 0x8000); } | |
42cacb20 | 1194 | |
dd93cd0a | 1195 | // R_POWERPC_ADDR16_HIGHEST: ((Symbol + Addend) >> 48) & 0xffff |
42cacb20 | 1196 | static inline void |
dd93cd0a | 1197 | addr16_hi3(unsigned char* view, Address value) |
f4baf0d4 | 1198 | { This::template rela<16>(view, 48, 0xffff, value, CHECK_NONE); } |
42cacb20 | 1199 | |
dd93cd0a | 1200 | // R_POWERPC_ADDR16_HIGHESTA: ((Symbol + Addend + 0x8000) >> 48) & 0xffff |
42cacb20 | 1201 | static inline void |
dd93cd0a AM |
1202 | addr16_ha3(unsigned char* view, Address value) |
1203 | { This::addr16_hi3(view, value + 0x8000); } | |
1204 | ||
1205 | // R_POWERPC_ADDR14: (Symbol + Addend) & 0xfffc | |
f4baf0d4 AM |
1206 | static inline Status |
1207 | addr14(unsigned char* view, Address value, Overflow_check overflow) | |
dd93cd0a | 1208 | { |
f4baf0d4 AM |
1209 | Status stat = This::template rela<32>(view, 0, 0xfffc, value, overflow); |
1210 | if (overflow != CHECK_NONE && (value & 3) != 0) | |
1211 | stat = STATUS_OVERFLOW; | |
dd93cd0a AM |
1212 | return stat; |
1213 | } | |
cf43a2fe AM |
1214 | }; |
1215 | ||
c9269dff AM |
1216 | // Stash away the index of .got2 or .opd in a relocatable object, if |
1217 | // such a section exists. | |
cf43a2fe AM |
1218 | |
1219 | template<int size, bool big_endian> | |
1220 | bool | |
1221 | Powerpc_relobj<size, big_endian>::do_find_special_sections( | |
1222 | Read_symbols_data* sd) | |
1223 | { | |
c9269dff AM |
1224 | const unsigned char* const pshdrs = sd->section_headers->data(); |
1225 | const unsigned char* namesu = sd->section_names->data(); | |
1226 | const char* names = reinterpret_cast<const char*>(namesu); | |
1227 | section_size_type names_size = sd->section_names_size; | |
1228 | const unsigned char* s; | |
1229 | ||
1230 | s = this->find_shdr(pshdrs, size == 32 ? ".got2" : ".opd", | |
1231 | names, names_size, NULL); | |
1232 | if (s != NULL) | |
1233 | { | |
1234 | unsigned int ndx = (s - pshdrs) / elfcpp::Elf_sizes<size>::shdr_size; | |
1235 | this->special_ = ndx; | |
1236 | } | |
1237 | return Sized_relobj_file<size, big_endian>::do_find_special_sections(sd); | |
1238 | } | |
1239 | ||
1240 | // Examine .rela.opd to build info about function entry points. | |
1241 | ||
1242 | template<int size, bool big_endian> | |
1243 | void | |
1244 | Powerpc_relobj<size, big_endian>::scan_opd_relocs( | |
1245 | size_t reloc_count, | |
1246 | const unsigned char* prelocs, | |
1247 | const unsigned char* plocal_syms) | |
1248 | { | |
1249 | if (size == 64) | |
cf43a2fe | 1250 | { |
c9269dff AM |
1251 | typedef typename Reloc_types<elfcpp::SHT_RELA, size, big_endian>::Reloc |
1252 | Reltype; | |
1253 | const int reloc_size | |
1254 | = Reloc_types<elfcpp::SHT_RELA, size, big_endian>::reloc_size; | |
1255 | const int sym_size = elfcpp::Elf_sizes<size>::sym_size; | |
ec4dbad3 AM |
1256 | Address expected_off = 0; |
1257 | bool regular = true; | |
1258 | unsigned int opd_ent_size = 0; | |
c9269dff AM |
1259 | |
1260 | for (size_t i = 0; i < reloc_count; ++i, prelocs += reloc_size) | |
cf43a2fe | 1261 | { |
c9269dff AM |
1262 | Reltype reloc(prelocs); |
1263 | typename elfcpp::Elf_types<size>::Elf_WXword r_info | |
1264 | = reloc.get_r_info(); | |
1265 | unsigned int r_type = elfcpp::elf_r_type<size>(r_info); | |
1266 | if (r_type == elfcpp::R_PPC64_ADDR64) | |
1267 | { | |
1268 | unsigned int r_sym = elfcpp::elf_r_sym<size>(r_info); | |
1269 | typename elfcpp::Elf_types<size>::Elf_Addr value; | |
1270 | bool is_ordinary; | |
1271 | unsigned int shndx; | |
1272 | if (r_sym < this->local_symbol_count()) | |
1273 | { | |
1274 | typename elfcpp::Sym<size, big_endian> | |
1275 | lsym(plocal_syms + r_sym * sym_size); | |
1276 | shndx = lsym.get_st_shndx(); | |
1277 | shndx = this->adjust_sym_shndx(r_sym, shndx, &is_ordinary); | |
1278 | value = lsym.get_st_value(); | |
1279 | } | |
1280 | else | |
1281 | shndx = this->symbol_section_and_value(r_sym, &value, | |
1282 | &is_ordinary); | |
1283 | this->set_opd_ent(reloc.get_r_offset(), shndx, | |
1284 | value + reloc.get_r_addend()); | |
ec4dbad3 AM |
1285 | if (i == 2) |
1286 | { | |
1287 | expected_off = reloc.get_r_offset(); | |
1288 | opd_ent_size = expected_off; | |
1289 | } | |
1290 | else if (expected_off != reloc.get_r_offset()) | |
1291 | regular = false; | |
1292 | expected_off += opd_ent_size; | |
1293 | } | |
1294 | else if (r_type == elfcpp::R_PPC64_TOC) | |
1295 | { | |
1296 | if (expected_off - opd_ent_size + 8 != reloc.get_r_offset()) | |
1297 | regular = false; | |
1298 | } | |
1299 | else | |
1300 | { | |
1301 | gold_warning(_("%s: unexpected reloc type %u in .opd section"), | |
1302 | this->name().c_str(), r_type); | |
1303 | regular = false; | |
c9269dff AM |
1304 | } |
1305 | } | |
ec4dbad3 AM |
1306 | if (reloc_count <= 2) |
1307 | opd_ent_size = this->section_size(this->opd_shndx()); | |
1308 | if (opd_ent_size != 24 && opd_ent_size != 16) | |
1309 | regular = false; | |
1310 | if (!regular) | |
1311 | { | |
1312 | gold_warning(_("%s: .opd is not a regular array of opd entries"), | |
1313 | this->name().c_str()); | |
1314 | opd_ent_size = 0; | |
1315 | } | |
c9269dff AM |
1316 | } |
1317 | } | |
1318 | ||
1319 | template<int size, bool big_endian> | |
1320 | void | |
1321 | Powerpc_relobj<size, big_endian>::do_read_relocs(Read_relocs_data* rd) | |
1322 | { | |
1323 | Sized_relobj_file<size, big_endian>::do_read_relocs(rd); | |
1324 | if (size == 64) | |
1325 | { | |
1326 | for (Read_relocs_data::Relocs_list::iterator p = rd->relocs.begin(); | |
1327 | p != rd->relocs.end(); | |
1328 | ++p) | |
1329 | { | |
1330 | if (p->data_shndx == this->opd_shndx()) | |
1331 | { | |
ec4dbad3 AM |
1332 | uint64_t opd_size = this->section_size(this->opd_shndx()); |
1333 | gold_assert(opd_size == static_cast<size_t>(opd_size)); | |
1334 | if (opd_size != 0) | |
1335 | { | |
1336 | this->init_opd(opd_size); | |
1337 | this->scan_opd_relocs(p->reloc_count, p->contents->data(), | |
1338 | rd->local_symbols->data()); | |
1339 | } | |
c9269dff AM |
1340 | break; |
1341 | } | |
cf43a2fe AM |
1342 | } |
1343 | } | |
cf43a2fe AM |
1344 | } |
1345 | ||
1346 | // Set up PowerPC target specific relobj. | |
1347 | ||
1348 | template<int size, bool big_endian> | |
1349 | Object* | |
1350 | Target_powerpc<size, big_endian>::do_make_elf_object( | |
1351 | const std::string& name, | |
1352 | Input_file* input_file, | |
1353 | off_t offset, const elfcpp::Ehdr<size, big_endian>& ehdr) | |
1354 | { | |
1355 | int et = ehdr.get_e_type(); | |
957564c9 AS |
1356 | // ET_EXEC files are valid input for --just-symbols/-R, |
1357 | // and we treat them as relocatable objects. | |
1358 | if (et == elfcpp::ET_REL | |
1359 | || (et == elfcpp::ET_EXEC && input_file->just_symbols())) | |
cf43a2fe AM |
1360 | { |
1361 | Powerpc_relobj<size, big_endian>* obj = | |
c9269dff | 1362 | new Powerpc_relobj<size, big_endian>(name, input_file, offset, ehdr); |
cf43a2fe AM |
1363 | obj->setup(); |
1364 | return obj; | |
1365 | } | |
1366 | else if (et == elfcpp::ET_DYN) | |
1367 | { | |
1368 | Sized_dynobj<size, big_endian>* obj = | |
c9269dff | 1369 | new Sized_dynobj<size, big_endian>(name, input_file, offset, ehdr); |
cf43a2fe AM |
1370 | obj->setup(); |
1371 | return obj; | |
1372 | } | |
1373 | else | |
1374 | { | |
c9269dff | 1375 | gold_error(_("%s: unsupported ELF file type %d"), name.c_str(), et); |
cf43a2fe AM |
1376 | return NULL; |
1377 | } | |
1378 | } | |
1379 | ||
1380 | template<int size, bool big_endian> | |
1381 | class Output_data_got_powerpc : public Output_data_got<size, big_endian> | |
1382 | { | |
1383 | public: | |
1384 | typedef typename elfcpp::Elf_types<size>::Elf_Addr Valtype; | |
1385 | typedef Output_data_reloc<elfcpp::SHT_RELA, true, size, big_endian> Rela_dyn; | |
1386 | ||
1387 | Output_data_got_powerpc(Symbol_table* symtab, Layout* layout) | |
1388 | : Output_data_got<size, big_endian>(), | |
1389 | symtab_(symtab), layout_(layout), | |
1390 | header_ent_cnt_(size == 32 ? 3 : 1), | |
1391 | header_index_(size == 32 ? 0x2000 : 0) | |
1392 | {} | |
1393 | ||
1394 | class Got_entry; | |
1395 | ||
1396 | // Create a new GOT entry and return its offset. | |
1397 | unsigned int | |
1398 | add_got_entry(Got_entry got_entry) | |
42cacb20 | 1399 | { |
cf43a2fe AM |
1400 | this->reserve_ent(); |
1401 | return Output_data_got<size, big_endian>::add_got_entry(got_entry); | |
1402 | } | |
42cacb20 | 1403 | |
cf43a2fe AM |
1404 | // Create a pair of new GOT entries and return the offset of the first. |
1405 | unsigned int | |
1406 | add_got_entry_pair(Got_entry got_entry_1, Got_entry got_entry_2) | |
1407 | { | |
1408 | this->reserve_ent(2); | |
1409 | return Output_data_got<size, big_endian>::add_got_entry_pair(got_entry_1, | |
1410 | got_entry_2); | |
1411 | } | |
42cacb20 | 1412 | |
dd93cd0a AM |
1413 | unsigned int |
1414 | add_constant_pair(Valtype c1, Valtype c2) | |
1415 | { | |
1416 | this->reserve_ent(2); | |
1417 | unsigned int got_offset = this->add_constant(c1); | |
1418 | this->add_constant(c2); | |
1419 | return got_offset; | |
1420 | } | |
1421 | ||
1422 | // Offset of _GLOBAL_OFFSET_TABLE_. | |
cf43a2fe AM |
1423 | unsigned int |
1424 | g_o_t() const | |
1425 | { | |
1426 | return this->got_offset(this->header_index_); | |
42cacb20 | 1427 | } |
cf43a2fe | 1428 | |
dd93cd0a AM |
1429 | // Offset of base used to access the GOT/TOC. |
1430 | // The got/toc pointer reg will be set to this value. | |
1431 | typename elfcpp::Elf_types<size>::Elf_Off | |
1432 | got_base_offset(const Powerpc_relobj<size, big_endian>* object) const | |
1433 | { | |
1434 | if (size == 32) | |
1435 | return this->g_o_t(); | |
1436 | else | |
1437 | return (this->output_section()->address() | |
1438 | + object->toc_base_offset() | |
1439 | - this->address()); | |
1440 | } | |
1441 | ||
cf43a2fe AM |
1442 | // Ensure our GOT has a header. |
1443 | void | |
1444 | set_final_data_size() | |
1445 | { | |
1446 | if (this->header_ent_cnt_ != 0) | |
1447 | this->make_header(); | |
1448 | Output_data_got<size, big_endian>::set_final_data_size(); | |
1449 | } | |
1450 | ||
1451 | // First word of GOT header needs some values that are not | |
1452 | // handled by Output_data_got so poke them in here. | |
1453 | // For 32-bit, address of .dynamic, for 64-bit, address of TOCbase. | |
1454 | void | |
1455 | do_write(Output_file* of) | |
1456 | { | |
c9824451 AM |
1457 | Valtype val = 0; |
1458 | if (size == 32 && this->layout_->dynamic_data() != NULL) | |
1459 | val = this->layout_->dynamic_section()->address(); | |
1460 | if (size == 64) | |
1461 | val = this->output_section()->address() + 0x8000; | |
1462 | this->replace_constant(this->header_index_, val); | |
cf43a2fe AM |
1463 | Output_data_got<size, big_endian>::do_write(of); |
1464 | } | |
1465 | ||
1466 | private: | |
1467 | void | |
1468 | reserve_ent(unsigned int cnt = 1) | |
1469 | { | |
1470 | if (this->header_ent_cnt_ == 0) | |
1471 | return; | |
1472 | if (this->num_entries() + cnt > this->header_index_) | |
1473 | this->make_header(); | |
1474 | } | |
1475 | ||
1476 | void | |
1477 | make_header() | |
1478 | { | |
1479 | this->header_ent_cnt_ = 0; | |
1480 | this->header_index_ = this->num_entries(); | |
1481 | if (size == 32) | |
1482 | { | |
1483 | Output_data_got<size, big_endian>::add_constant(0); | |
1484 | Output_data_got<size, big_endian>::add_constant(0); | |
1485 | Output_data_got<size, big_endian>::add_constant(0); | |
1486 | ||
1487 | // Define _GLOBAL_OFFSET_TABLE_ at the header | |
1488 | this->symtab_->define_in_output_data("_GLOBAL_OFFSET_TABLE_", NULL, | |
1489 | Symbol_table::PREDEFINED, | |
1490 | this, this->g_o_t(), 0, | |
1491 | elfcpp::STT_OBJECT, | |
1492 | elfcpp::STB_LOCAL, | |
1493 | elfcpp::STV_HIDDEN, | |
1494 | 0, false, false); | |
1495 | } | |
1496 | else | |
1497 | Output_data_got<size, big_endian>::add_constant(0); | |
1498 | } | |
1499 | ||
1500 | // Stashed pointers. | |
1501 | Symbol_table* symtab_; | |
1502 | Layout* layout_; | |
1503 | ||
1504 | // GOT header size. | |
1505 | unsigned int header_ent_cnt_; | |
1506 | // GOT header index. | |
1507 | unsigned int header_index_; | |
42cacb20 DE |
1508 | }; |
1509 | ||
1510 | // Get the GOT section, creating it if necessary. | |
1511 | ||
1512 | template<int size, bool big_endian> | |
cf43a2fe | 1513 | Output_data_got_powerpc<size, big_endian>* |
42cacb20 DE |
1514 | Target_powerpc<size, big_endian>::got_section(Symbol_table* symtab, |
1515 | Layout* layout) | |
1516 | { | |
1517 | if (this->got_ == NULL) | |
1518 | { | |
1519 | gold_assert(symtab != NULL && layout != NULL); | |
1520 | ||
cf43a2fe AM |
1521 | this->got_ |
1522 | = new Output_data_got_powerpc<size, big_endian>(symtab, layout); | |
42cacb20 DE |
1523 | |
1524 | layout->add_output_section_data(".got", elfcpp::SHT_PROGBITS, | |
1525 | elfcpp::SHF_ALLOC | elfcpp::SHF_WRITE, | |
22f0da72 | 1526 | this->got_, ORDER_DATA, false); |
42cacb20 DE |
1527 | } |
1528 | ||
1529 | return this->got_; | |
1530 | } | |
1531 | ||
1532 | // Get the dynamic reloc section, creating it if necessary. | |
1533 | ||
1534 | template<int size, bool big_endian> | |
1535 | typename Target_powerpc<size, big_endian>::Reloc_section* | |
1536 | Target_powerpc<size, big_endian>::rela_dyn_section(Layout* layout) | |
1537 | { | |
1538 | if (this->rela_dyn_ == NULL) | |
1539 | { | |
1540 | gold_assert(layout != NULL); | |
1541 | this->rela_dyn_ = new Reloc_section(parameters->options().combreloc()); | |
1542 | layout->add_output_section_data(".rela.dyn", elfcpp::SHT_RELA, | |
22f0da72 ILT |
1543 | elfcpp::SHF_ALLOC, this->rela_dyn_, |
1544 | ORDER_DYNAMIC_RELOCS, false); | |
42cacb20 DE |
1545 | } |
1546 | return this->rela_dyn_; | |
1547 | } | |
1548 | ||
1549 | // A class to handle the PLT data. | |
1550 | ||
1551 | template<int size, bool big_endian> | |
cf43a2fe | 1552 | class Output_data_plt_powerpc : public Output_section_data_build |
42cacb20 DE |
1553 | { |
1554 | public: | |
1555 | typedef Output_data_reloc<elfcpp::SHT_RELA, true, | |
1556 | size, big_endian> Reloc_section; | |
1557 | ||
e5d5f5ed AM |
1558 | Output_data_plt_powerpc(Target_powerpc<size, big_endian>* targ, |
1559 | Reloc_section* plt_rel, | |
1560 | unsigned int reserved_size, | |
1561 | const char* name) | |
1562 | : Output_section_data_build(size == 32 ? 4 : 8), | |
1563 | rel_(plt_rel), | |
1564 | targ_(targ), | |
1565 | initial_plt_entry_size_(reserved_size), | |
1566 | name_(name) | |
1567 | { } | |
42cacb20 DE |
1568 | |
1569 | // Add an entry to the PLT. | |
03e25981 | 1570 | void |
cf43a2fe | 1571 | add_entry(Symbol*); |
42cacb20 | 1572 | |
03e25981 | 1573 | void |
e5d5f5ed AM |
1574 | add_ifunc_entry(Symbol*); |
1575 | ||
03e25981 | 1576 | void |
e5d5f5ed AM |
1577 | add_local_ifunc_entry(Sized_relobj_file<size, big_endian>*, unsigned int); |
1578 | ||
42cacb20 | 1579 | // Return the .rela.plt section data. |
e5d5f5ed | 1580 | Reloc_section* |
cf43a2fe AM |
1581 | rel_plt() const |
1582 | { | |
42cacb20 DE |
1583 | return this->rel_; |
1584 | } | |
1585 | ||
0e70b911 CC |
1586 | // Return the number of PLT entries. |
1587 | unsigned int | |
1588 | entry_count() const | |
d83ce4e3 | 1589 | { |
e5d5f5ed | 1590 | return ((this->current_data_size() - this->initial_plt_entry_size_) |
d83ce4e3 AM |
1591 | / plt_entry_size); |
1592 | } | |
0e70b911 CC |
1593 | |
1594 | // Return the offset of the first non-reserved PLT entry. | |
e5d5f5ed | 1595 | unsigned int |
0e70b911 | 1596 | first_plt_entry_offset() |
e5d5f5ed | 1597 | { return this->initial_plt_entry_size_; } |
0e70b911 CC |
1598 | |
1599 | // Return the size of a PLT entry. | |
1600 | static unsigned int | |
1601 | get_plt_entry_size() | |
cf43a2fe | 1602 | { return plt_entry_size; } |
0e70b911 | 1603 | |
42cacb20 | 1604 | protected: |
42cacb20 | 1605 | void |
cf43a2fe | 1606 | do_adjust_output_section(Output_section* os) |
42cacb20 | 1607 | { |
cf43a2fe | 1608 | os->set_entsize(0); |
42cacb20 DE |
1609 | } |
1610 | ||
6ce78956 AM |
1611 | // Write to a map file. |
1612 | void | |
1613 | do_print_to_mapfile(Mapfile* mapfile) const | |
e5d5f5ed | 1614 | { mapfile->print_output_data(this, this->name_); } |
6ce78956 | 1615 | |
cf43a2fe AM |
1616 | private: |
1617 | // The size of an entry in the PLT. | |
1618 | static const int plt_entry_size = size == 32 ? 4 : 24; | |
cf43a2fe | 1619 | |
42cacb20 DE |
1620 | // Write out the PLT data. |
1621 | void | |
1622 | do_write(Output_file*); | |
1623 | ||
1624 | // The reloc section. | |
1625 | Reloc_section* rel_; | |
cf43a2fe AM |
1626 | // Allows access to .glink for do_write. |
1627 | Target_powerpc<size, big_endian>* targ_; | |
e5d5f5ed AM |
1628 | // The size of the first reserved entry. |
1629 | int initial_plt_entry_size_; | |
1630 | // What to report in map file. | |
1631 | const char *name_; | |
42cacb20 DE |
1632 | }; |
1633 | ||
e5d5f5ed | 1634 | // Add an entry to the PLT. |
42cacb20 DE |
1635 | |
1636 | template<int size, bool big_endian> | |
03e25981 | 1637 | void |
e5d5f5ed | 1638 | Output_data_plt_powerpc<size, big_endian>::add_entry(Symbol* gsym) |
42cacb20 | 1639 | { |
e5d5f5ed AM |
1640 | if (!gsym->has_plt_offset()) |
1641 | { | |
1642 | off_t off = this->current_data_size(); | |
1643 | if (off == 0) | |
1644 | off += this->first_plt_entry_offset(); | |
1645 | gsym->set_plt_offset(off); | |
1646 | gsym->set_needs_dynsym_entry(); | |
1647 | unsigned int dynrel = elfcpp::R_POWERPC_JMP_SLOT; | |
1648 | this->rel_->add_global(gsym, dynrel, this, off, 0); | |
1649 | off += plt_entry_size; | |
1650 | this->set_current_data_size(off); | |
1651 | } | |
42cacb20 DE |
1652 | } |
1653 | ||
e5d5f5ed | 1654 | // Add an entry for a global ifunc symbol that resolves locally, to the IPLT. |
42cacb20 DE |
1655 | |
1656 | template<int size, bool big_endian> | |
03e25981 | 1657 | void |
e5d5f5ed | 1658 | Output_data_plt_powerpc<size, big_endian>::add_ifunc_entry(Symbol* gsym) |
42cacb20 | 1659 | { |
cf43a2fe AM |
1660 | if (!gsym->has_plt_offset()) |
1661 | { | |
1662 | off_t off = this->current_data_size(); | |
cf43a2fe | 1663 | gsym->set_plt_offset(off); |
e5d5f5ed AM |
1664 | unsigned int dynrel = elfcpp::R_POWERPC_IRELATIVE; |
1665 | if (size == 64) | |
1666 | dynrel = elfcpp::R_PPC64_JMP_IREL; | |
1667 | this->rel_->add_symbolless_global_addend(gsym, dynrel, this, off, 0); | |
1668 | off += plt_entry_size; | |
1669 | this->set_current_data_size(off); | |
1670 | } | |
1671 | } | |
1672 | ||
1673 | // Add an entry for a local ifunc symbol to the IPLT. | |
1674 | ||
1675 | template<int size, bool big_endian> | |
03e25981 | 1676 | void |
e5d5f5ed AM |
1677 | Output_data_plt_powerpc<size, big_endian>::add_local_ifunc_entry( |
1678 | Sized_relobj_file<size, big_endian>* relobj, | |
1679 | unsigned int local_sym_index) | |
1680 | { | |
1681 | if (!relobj->local_has_plt_offset(local_sym_index)) | |
1682 | { | |
1683 | off_t off = this->current_data_size(); | |
1684 | relobj->set_local_plt_offset(local_sym_index, off); | |
1685 | unsigned int dynrel = elfcpp::R_POWERPC_IRELATIVE; | |
1686 | if (size == 64) | |
1687 | dynrel = elfcpp::R_PPC64_JMP_IREL; | |
1688 | this->rel_->add_symbolless_local_addend(relobj, local_sym_index, dynrel, | |
1689 | this, off, 0); | |
cf43a2fe AM |
1690 | off += plt_entry_size; |
1691 | this->set_current_data_size(off); | |
1692 | } | |
42cacb20 DE |
1693 | } |
1694 | ||
dd93cd0a AM |
1695 | static const uint32_t add_0_11_11 = 0x7c0b5a14; |
1696 | static const uint32_t add_3_3_2 = 0x7c631214; | |
1697 | static const uint32_t add_3_3_13 = 0x7c636a14; | |
1698 | static const uint32_t add_11_0_11 = 0x7d605a14; | |
1699 | static const uint32_t add_12_2_11 = 0x7d825a14; | |
1700 | static const uint32_t addi_11_11 = 0x396b0000; | |
1701 | static const uint32_t addi_12_12 = 0x398c0000; | |
1702 | static const uint32_t addi_2_2 = 0x38420000; | |
1703 | static const uint32_t addi_3_2 = 0x38620000; | |
1704 | static const uint32_t addi_3_3 = 0x38630000; | |
1705 | static const uint32_t addis_0_2 = 0x3c020000; | |
1706 | static const uint32_t addis_0_13 = 0x3c0d0000; | |
c9269dff AM |
1707 | static const uint32_t addis_11_11 = 0x3d6b0000; |
1708 | static const uint32_t addis_11_30 = 0x3d7e0000; | |
1709 | static const uint32_t addis_12_12 = 0x3d8c0000; | |
dd93cd0a AM |
1710 | static const uint32_t addis_12_2 = 0x3d820000; |
1711 | static const uint32_t addis_3_2 = 0x3c620000; | |
1712 | static const uint32_t addis_3_13 = 0x3c6d0000; | |
c9269dff AM |
1713 | static const uint32_t b = 0x48000000; |
1714 | static const uint32_t bcl_20_31 = 0x429f0005; | |
1715 | static const uint32_t bctr = 0x4e800420; | |
1716 | static const uint32_t blrl = 0x4e800021; | |
dd93cd0a AM |
1717 | static const uint32_t cror_15_15_15 = 0x4def7b82; |
1718 | static const uint32_t cror_31_31_31 = 0x4ffffb82; | |
1719 | static const uint32_t ld_11_12 = 0xe96c0000; | |
1720 | static const uint32_t ld_11_2 = 0xe9620000; | |
1721 | static const uint32_t ld_2_1 = 0xe8410000; | |
1722 | static const uint32_t ld_2_11 = 0xe84b0000; | |
1723 | static const uint32_t ld_2_12 = 0xe84c0000; | |
1724 | static const uint32_t ld_2_2 = 0xe8420000; | |
1725 | static const uint32_t li_0_0 = 0x38000000; | |
1726 | static const uint32_t lis_0_0 = 0x3c000000; | |
c9269dff AM |
1727 | static const uint32_t lis_11 = 0x3d600000; |
1728 | static const uint32_t lis_12 = 0x3d800000; | |
c9269dff AM |
1729 | static const uint32_t lwz_0_12 = 0x800c0000; |
1730 | static const uint32_t lwz_11_11 = 0x816b0000; | |
1731 | static const uint32_t lwz_11_30 = 0x817e0000; | |
1732 | static const uint32_t lwz_12_12 = 0x818c0000; | |
dd93cd0a | 1733 | static const uint32_t lwzu_0_12 = 0x840c0000; |
c9269dff | 1734 | static const uint32_t mflr_0 = 0x7c0802a6; |
dd93cd0a | 1735 | static const uint32_t mflr_11 = 0x7d6802a6; |
c9269dff AM |
1736 | static const uint32_t mflr_12 = 0x7d8802a6; |
1737 | static const uint32_t mtctr_0 = 0x7c0903a6; | |
1738 | static const uint32_t mtctr_11 = 0x7d6903a6; | |
1739 | static const uint32_t mtlr_0 = 0x7c0803a6; | |
c9269dff | 1740 | static const uint32_t mtlr_12 = 0x7d8803a6; |
dd93cd0a | 1741 | static const uint32_t nop = 0x60000000; |
c9269dff | 1742 | static const uint32_t ori_0_0_0 = 0x60000000; |
dd93cd0a AM |
1743 | static const uint32_t std_2_1 = 0xf8410000; |
1744 | static const uint32_t sub_11_11_12 = 0x7d6c5850; | |
42cacb20 DE |
1745 | |
1746 | // Write out the PLT. | |
1747 | ||
1748 | template<int size, bool big_endian> | |
1749 | void | |
1750 | Output_data_plt_powerpc<size, big_endian>::do_write(Output_file* of) | |
1751 | { | |
cf43a2fe AM |
1752 | if (size == 32) |
1753 | { | |
1754 | const off_t offset = this->offset(); | |
1755 | const section_size_type oview_size | |
1756 | = convert_to_section_size_type(this->data_size()); | |
1757 | unsigned char* const oview = of->get_output_view(offset, oview_size); | |
1758 | unsigned char* pov = oview; | |
1759 | unsigned char* endpov = oview + oview_size; | |
1760 | ||
e5d5f5ed | 1761 | // The address of the .glink branch table |
cf43a2fe AM |
1762 | const Output_data_glink<size, big_endian>* glink |
1763 | = this->targ_->glink_section(); | |
1764 | elfcpp::Elf_types<32>::Elf_Addr branch_tab | |
1765 | = glink->address() + glink->pltresolve(); | |
1766 | ||
1767 | while (pov < endpov) | |
1768 | { | |
1769 | elfcpp::Swap<32, big_endian>::writeval(pov, branch_tab); | |
1770 | pov += 4; | |
1771 | branch_tab += 4; | |
1772 | } | |
1773 | ||
1774 | of->write_output_view(offset, oview_size, oview); | |
1775 | } | |
1776 | } | |
1777 | ||
1778 | // Create the PLT section. | |
1779 | ||
1780 | template<int size, bool big_endian> | |
1781 | void | |
1782 | Target_powerpc<size, big_endian>::make_plt_section(Layout* layout) | |
1783 | { | |
1784 | if (this->plt_ == NULL) | |
1785 | { | |
1786 | if (this->glink_ == NULL) | |
1787 | make_glink_section(layout); | |
1788 | ||
1789 | // Ensure that .rela.dyn always appears before .rela.plt This is | |
1790 | // necessary due to how, on PowerPC and some other targets, .rela.dyn | |
1791 | // needs to include .rela.plt in it's range. | |
1792 | this->rela_dyn_section(layout); | |
1793 | ||
e5d5f5ed AM |
1794 | Reloc_section* plt_rel = new Reloc_section(false); |
1795 | layout->add_output_section_data(".rela.plt", elfcpp::SHT_RELA, | |
1796 | elfcpp::SHF_ALLOC, plt_rel, | |
1797 | ORDER_DYNAMIC_PLT_RELOCS, false); | |
1798 | this->plt_ | |
1799 | = new Output_data_plt_powerpc<size, big_endian>(this, plt_rel, | |
1800 | size == 32 ? 0 : 24, | |
1801 | "** PLT"); | |
cf43a2fe AM |
1802 | layout->add_output_section_data(".plt", |
1803 | (size == 32 | |
1804 | ? elfcpp::SHT_PROGBITS | |
1805 | : elfcpp::SHT_NOBITS), | |
1806 | elfcpp::SHF_ALLOC | elfcpp::SHF_WRITE, | |
1807 | this->plt_, | |
1808 | (size == 32 | |
1809 | ? ORDER_SMALL_DATA | |
1810 | : ORDER_SMALL_BSS), | |
1811 | false); | |
1812 | } | |
1813 | } | |
1814 | ||
e5d5f5ed AM |
1815 | // Create the IPLT section. |
1816 | ||
1817 | template<int size, bool big_endian> | |
1818 | void | |
c9824451 | 1819 | Target_powerpc<size, big_endian>::make_iplt_section(Layout* layout) |
e5d5f5ed AM |
1820 | { |
1821 | if (this->iplt_ == NULL) | |
1822 | { | |
1823 | this->make_plt_section(layout); | |
1824 | ||
1825 | Reloc_section* iplt_rel = new Reloc_section(false); | |
1826 | this->rela_dyn_->output_section()->add_output_section_data(iplt_rel); | |
1827 | this->iplt_ | |
1828 | = new Output_data_plt_powerpc<size, big_endian>(this, iplt_rel, | |
1829 | 0, "** IPLT"); | |
1830 | this->plt_->output_section()->add_output_section_data(this->iplt_); | |
e5d5f5ed AM |
1831 | } |
1832 | } | |
1833 | ||
cf43a2fe AM |
1834 | // A class to handle .glink. |
1835 | ||
1836 | template<int size, bool big_endian> | |
1837 | class Output_data_glink : public Output_section_data | |
1838 | { | |
1839 | public: | |
c9269dff AM |
1840 | static const int pltresolve_size = 16*4; |
1841 | ||
cf43a2fe AM |
1842 | Output_data_glink(Target_powerpc<size, big_endian>*); |
1843 | ||
1844 | // Add an entry | |
1845 | void | |
c9824451 AM |
1846 | add_entry(const Sized_relobj_file<size, big_endian>*, |
1847 | const Symbol*, | |
1848 | const elfcpp::Rela<size, big_endian>&); | |
e5d5f5ed AM |
1849 | |
1850 | void | |
c9824451 AM |
1851 | add_entry(const Sized_relobj_file<size, big_endian>*, |
1852 | unsigned int, | |
1853 | const elfcpp::Rela<size, big_endian>&); | |
cf43a2fe AM |
1854 | |
1855 | unsigned int | |
c9824451 | 1856 | find_entry(const Symbol*) const; |
e5d5f5ed AM |
1857 | |
1858 | unsigned int | |
c9824451 AM |
1859 | find_entry(const Sized_relobj_file<size, big_endian>*, unsigned int) const; |
1860 | ||
1861 | unsigned int | |
1862 | find_entry(const Sized_relobj_file<size, big_endian>*, | |
1863 | const Symbol*, | |
1864 | const elfcpp::Rela<size, big_endian>&) const; | |
1865 | ||
1866 | unsigned int | |
1867 | find_entry(const Sized_relobj_file<size, big_endian>*, | |
1868 | unsigned int, | |
1869 | const elfcpp::Rela<size, big_endian>&) const; | |
cf43a2fe AM |
1870 | |
1871 | unsigned int | |
1872 | glink_entry_size() const | |
1873 | { | |
1874 | if (size == 32) | |
1875 | return 4 * 4; | |
1876 | else | |
1877 | // FIXME: We should be using multiple glink sections for | |
1878 | // stubs to support > 33M applications. | |
1879 | return 8 * 4; | |
1880 | } | |
1881 | ||
1882 | off_t | |
1883 | pltresolve() const | |
1884 | { | |
1885 | return this->pltresolve_; | |
1886 | } | |
1887 | ||
6ce78956 AM |
1888 | protected: |
1889 | // Write to a map file. | |
1890 | void | |
1891 | do_print_to_mapfile(Mapfile* mapfile) const | |
1892 | { mapfile->print_output_data(this, _("** glink")); } | |
1893 | ||
cf43a2fe | 1894 | private: |
cf43a2fe AM |
1895 | void |
1896 | set_final_data_size(); | |
1897 | ||
1898 | // Write out .glink | |
1899 | void | |
1900 | do_write(Output_file*); | |
1901 | ||
d1a8cabd | 1902 | class Glink_sym_ent |
cf43a2fe | 1903 | { |
d1a8cabd | 1904 | public: |
c9824451 AM |
1905 | Glink_sym_ent(const Symbol* sym) |
1906 | : sym_(sym), object_(0), addend_(0), locsym_(0) | |
1907 | { } | |
1908 | ||
1909 | Glink_sym_ent(const Sized_relobj_file<size, big_endian>* object, | |
1910 | unsigned int locsym_index) | |
1911 | : sym_(NULL), object_(object), addend_(0), locsym_(locsym_index) | |
1912 | { } | |
1913 | ||
1914 | Glink_sym_ent(const Sized_relobj_file<size, big_endian>* object, | |
1915 | const Symbol* sym, | |
1916 | const elfcpp::Rela<size, big_endian>& reloc) | |
e5d5f5ed | 1917 | : sym_(sym), object_(0), addend_(0), locsym_(0) |
cf43a2fe AM |
1918 | { |
1919 | if (size != 32) | |
1920 | this->addend_ = reloc.get_r_addend(); | |
d1a8cabd AM |
1921 | else if (parameters->options().output_is_position_independent() |
1922 | && (elfcpp::elf_r_type<size>(reloc.get_r_info()) | |
1923 | == elfcpp::R_PPC_PLTREL24)) | |
cf43a2fe | 1924 | { |
d1a8cabd | 1925 | this->addend_ = reloc.get_r_addend(); |
e5d5f5ed | 1926 | if (this->addend_ >= 32768) |
d1a8cabd | 1927 | this->object_ = object; |
cf43a2fe AM |
1928 | } |
1929 | } | |
1930 | ||
c9824451 AM |
1931 | Glink_sym_ent(const Sized_relobj_file<size, big_endian>* object, |
1932 | unsigned int locsym_index, | |
1933 | const elfcpp::Rela<size, big_endian>& reloc) | |
e5d5f5ed AM |
1934 | : sym_(NULL), object_(object), addend_(0), locsym_(locsym_index) |
1935 | { | |
1936 | if (size != 32) | |
1937 | this->addend_ = reloc.get_r_addend(); | |
1938 | else if (parameters->options().output_is_position_independent() | |
1939 | && (elfcpp::elf_r_type<size>(reloc.get_r_info()) | |
1940 | == elfcpp::R_PPC_PLTREL24)) | |
1941 | this->addend_ = reloc.get_r_addend(); | |
1942 | } | |
1943 | ||
cf43a2fe AM |
1944 | bool operator==(const Glink_sym_ent& that) const |
1945 | { | |
1946 | return (this->sym_ == that.sym_ | |
1947 | && this->object_ == that.object_ | |
e5d5f5ed AM |
1948 | && this->addend_ == that.addend_ |
1949 | && this->locsym_ == that.locsym_); | |
cf43a2fe | 1950 | } |
c9269dff AM |
1951 | |
1952 | const Symbol* sym_; | |
e5d5f5ed AM |
1953 | const Sized_relobj_file<size, big_endian>* object_; |
1954 | typename elfcpp::Elf_types<size>::Elf_Addr addend_; | |
1955 | unsigned int locsym_; | |
cf43a2fe AM |
1956 | }; |
1957 | ||
d1a8cabd | 1958 | class Glink_sym_ent_hash |
cf43a2fe | 1959 | { |
d1a8cabd | 1960 | public: |
cf43a2fe AM |
1961 | size_t operator()(const Glink_sym_ent& ent) const |
1962 | { | |
1963 | return (reinterpret_cast<uintptr_t>(ent.sym_) | |
1964 | ^ reinterpret_cast<uintptr_t>(ent.object_) | |
e5d5f5ed AM |
1965 | ^ ent.addend_ |
1966 | ^ ent.locsym_); | |
cf43a2fe AM |
1967 | } |
1968 | }; | |
1969 | ||
d1a8cabd | 1970 | // Map sym/object/addend to index. |
cf43a2fe AM |
1971 | typedef Unordered_map<Glink_sym_ent, unsigned int, |
1972 | Glink_sym_ent_hash> Glink_entries; | |
1973 | Glink_entries glink_entries_; | |
1974 | ||
1975 | // Offset of pltresolve stub (actually, branch table for 32-bit) | |
1976 | off_t pltresolve_; | |
1977 | ||
1978 | // Allows access to .got and .plt for do_write. | |
1979 | Target_powerpc<size, big_endian>* targ_; | |
1980 | }; | |
1981 | ||
1982 | // Create the glink section. | |
1983 | ||
1984 | template<int size, bool big_endian> | |
d83ce4e3 AM |
1985 | Output_data_glink<size, big_endian>::Output_data_glink( |
1986 | Target_powerpc<size, big_endian>* targ) | |
cf43a2fe AM |
1987 | : Output_section_data(16), |
1988 | pltresolve_(0), targ_(targ) | |
1989 | { | |
1990 | } | |
1991 | ||
1992 | // Add an entry to glink, if we do not already have one for this | |
d1a8cabd | 1993 | // sym/object/addend combo. |
cf43a2fe AM |
1994 | |
1995 | template<int size, bool big_endian> | |
1996 | void | |
d83ce4e3 | 1997 | Output_data_glink<size, big_endian>::add_entry( |
c9824451 | 1998 | const Sized_relobj_file<size, big_endian>* object, |
d83ce4e3 | 1999 | const Symbol* gsym, |
c9824451 | 2000 | const elfcpp::Rela<size, big_endian>& reloc) |
cf43a2fe | 2001 | { |
c9824451 | 2002 | Glink_sym_ent ent(object, gsym, reloc); |
cf43a2fe | 2003 | unsigned int indx = this->glink_entries_.size(); |
d83ce4e3 | 2004 | this->glink_entries_.insert(std::make_pair(ent, indx)); |
cf43a2fe AM |
2005 | } |
2006 | ||
e5d5f5ed AM |
2007 | template<int size, bool big_endian> |
2008 | void | |
2009 | Output_data_glink<size, big_endian>::add_entry( | |
c9824451 | 2010 | const Sized_relobj_file<size, big_endian>* object, |
e5d5f5ed | 2011 | unsigned int locsym_index, |
c9824451 | 2012 | const elfcpp::Rela<size, big_endian>& reloc) |
e5d5f5ed | 2013 | { |
c9824451 | 2014 | Glink_sym_ent ent(object, locsym_index, reloc); |
e5d5f5ed AM |
2015 | unsigned int indx = this->glink_entries_.size(); |
2016 | this->glink_entries_.insert(std::make_pair(ent, indx)); | |
2017 | } | |
2018 | ||
cf43a2fe AM |
2019 | template<int size, bool big_endian> |
2020 | unsigned int | |
d83ce4e3 | 2021 | Output_data_glink<size, big_endian>::find_entry( |
c9824451 | 2022 | const Sized_relobj_file<size, big_endian>* object, |
d83ce4e3 | 2023 | const Symbol* gsym, |
c9824451 AM |
2024 | const elfcpp::Rela<size, big_endian>& reloc) const |
2025 | { | |
2026 | Glink_sym_ent ent(object, gsym, reloc); | |
2027 | typename Glink_entries::const_iterator p = this->glink_entries_.find(ent); | |
2028 | gold_assert(p != this->glink_entries_.end()); | |
2029 | return p->second; | |
2030 | } | |
2031 | ||
2032 | template<int size, bool big_endian> | |
2033 | unsigned int | |
2034 | Output_data_glink<size, big_endian>::find_entry(const Symbol* gsym) const | |
cf43a2fe | 2035 | { |
c9824451 | 2036 | Glink_sym_ent ent(gsym); |
cf43a2fe AM |
2037 | typename Glink_entries::const_iterator p = this->glink_entries_.find(ent); |
2038 | gold_assert(p != this->glink_entries_.end()); | |
2039 | return p->second; | |
2040 | } | |
2041 | ||
e5d5f5ed AM |
2042 | template<int size, bool big_endian> |
2043 | unsigned int | |
2044 | Output_data_glink<size, big_endian>::find_entry( | |
c9824451 | 2045 | const Sized_relobj_file<size, big_endian>* object, |
e5d5f5ed | 2046 | unsigned int locsym_index, |
c9824451 | 2047 | const elfcpp::Rela<size, big_endian>& reloc) const |
e5d5f5ed | 2048 | { |
c9824451 AM |
2049 | Glink_sym_ent ent(object, locsym_index, reloc); |
2050 | typename Glink_entries::const_iterator p = this->glink_entries_.find(ent); | |
2051 | gold_assert(p != this->glink_entries_.end()); | |
2052 | return p->second; | |
2053 | } | |
2054 | ||
2055 | template<int size, bool big_endian> | |
2056 | unsigned int | |
2057 | Output_data_glink<size, big_endian>::find_entry( | |
2058 | const Sized_relobj_file<size, big_endian>* object, | |
2059 | unsigned int locsym_index) const | |
2060 | { | |
2061 | Glink_sym_ent ent(object, locsym_index); | |
e5d5f5ed AM |
2062 | typename Glink_entries::const_iterator p = this->glink_entries_.find(ent); |
2063 | gold_assert(p != this->glink_entries_.end()); | |
2064 | return p->second; | |
2065 | } | |
2066 | ||
cf43a2fe AM |
2067 | template<int size, bool big_endian> |
2068 | void | |
2069 | Output_data_glink<size, big_endian>::set_final_data_size() | |
2070 | { | |
2071 | unsigned int count = this->glink_entries_.size(); | |
2072 | off_t total = count; | |
2073 | ||
2074 | if (count != 0) | |
2075 | { | |
2076 | if (size == 32) | |
2077 | { | |
2078 | total *= 16; | |
2079 | this->pltresolve_ = total; | |
2080 | ||
2081 | // space for branch table | |
2082 | total += 4 * (count - 1); | |
2083 | ||
2084 | total += -total & 15; | |
2085 | total += this->pltresolve_size; | |
2086 | } | |
2087 | else | |
2088 | { | |
2089 | total *= 32; | |
2090 | this->pltresolve_ = total; | |
2091 | total += this->pltresolve_size; | |
2092 | ||
2093 | // space for branch table | |
2094 | total += 8 * count; | |
2095 | if (count > 0x8000) | |
2096 | total += 4 * (count - 0x8000); | |
2097 | } | |
2098 | } | |
2099 | ||
2100 | this->set_data_size(total); | |
2101 | } | |
2102 | ||
2103 | static inline uint32_t | |
2104 | l(uint32_t a) | |
2105 | { | |
2106 | return a & 0xffff; | |
2107 | } | |
2108 | ||
2109 | static inline uint32_t | |
2110 | hi(uint32_t a) | |
2111 | { | |
2112 | return l(a >> 16); | |
2113 | } | |
2114 | ||
2115 | static inline uint32_t | |
2116 | ha(uint32_t a) | |
2117 | { | |
2118 | return hi(a + 0x8000); | |
2119 | } | |
2120 | ||
2121 | template<bool big_endian> | |
2122 | static inline void | |
c9269dff | 2123 | write_insn(unsigned char* p, uint32_t v) |
cf43a2fe AM |
2124 | { |
2125 | elfcpp::Swap<32, big_endian>::writeval(p, v); | |
2126 | } | |
2127 | ||
2128 | // Write out .glink. | |
2129 | ||
2130 | template<int size, bool big_endian> | |
2131 | void | |
2132 | Output_data_glink<size, big_endian>::do_write(Output_file* of) | |
2133 | { | |
2134 | const off_t off = this->offset(); | |
42cacb20 DE |
2135 | const section_size_type oview_size = |
2136 | convert_to_section_size_type(this->data_size()); | |
cf43a2fe | 2137 | unsigned char* const oview = of->get_output_view(off, oview_size); |
c9269dff | 2138 | unsigned char* p; |
42cacb20 | 2139 | |
cf43a2fe | 2140 | // The base address of the .plt section. |
dd93cd0a | 2141 | typedef typename elfcpp::Elf_types<size>::Elf_Addr Address; |
e5d5f5ed | 2142 | static const Address invalid_address = static_cast<Address>(0) - 1; |
dd93cd0a | 2143 | Address plt_base = this->targ_->plt_section()->address(); |
e5d5f5ed | 2144 | Address iplt_base = invalid_address; |
cf43a2fe | 2145 | |
dd93cd0a AM |
2146 | const Output_data_got_powerpc<size, big_endian>* got |
2147 | = this->targ_->got_section(); | |
cf43a2fe AM |
2148 | |
2149 | if (size == 64) | |
2150 | { | |
dd93cd0a | 2151 | Address got_os_addr = got->output_section()->address(); |
c9269dff | 2152 | |
cf43a2fe AM |
2153 | // Write out call stubs. |
2154 | typename Glink_entries::const_iterator g; | |
2155 | for (g = this->glink_entries_.begin(); | |
2156 | g != this->glink_entries_.end(); | |
2157 | ++g) | |
2158 | { | |
e5d5f5ed AM |
2159 | Address plt_addr; |
2160 | bool is_ifunc; | |
2161 | const Symbol* gsym = g->first.sym_; | |
2162 | if (gsym != NULL) | |
2163 | { | |
2164 | is_ifunc = (gsym->type() == elfcpp::STT_GNU_IFUNC | |
2165 | && gsym->can_use_relative_reloc(false)); | |
2166 | plt_addr = gsym->plt_offset(); | |
2167 | } | |
2168 | else | |
2169 | { | |
2170 | is_ifunc = true; | |
2171 | const Sized_relobj_file<size, big_endian>* relobj | |
2172 | = g->first.object_; | |
2173 | unsigned int local_sym_index = g->first.locsym_; | |
2174 | plt_addr = relobj->local_plt_offset(local_sym_index); | |
2175 | } | |
2176 | if (is_ifunc) | |
2177 | { | |
2178 | if (iplt_base == invalid_address) | |
2179 | iplt_base = this->targ_->iplt_section()->address(); | |
2180 | plt_addr += iplt_base; | |
2181 | } | |
2182 | else | |
2183 | plt_addr += plt_base; | |
dd93cd0a AM |
2184 | const Powerpc_relobj<size, big_endian>* ppcobj = static_cast |
2185 | <const Powerpc_relobj<size, big_endian>*>(g->first.object_); | |
2186 | Address got_addr = got_os_addr + ppcobj->toc_base_offset(); | |
2187 | Address pltoff = plt_addr - got_addr; | |
cf43a2fe AM |
2188 | |
2189 | if (pltoff + 0x80008000 > 0xffffffff || (pltoff & 7) != 0) | |
2190 | gold_error(_("%s: linkage table error against `%s'"), | |
2191 | g->first.object_->name().c_str(), | |
2192 | g->first.sym_->demangled_name().c_str()); | |
2193 | ||
2194 | p = oview + g->second * this->glink_entry_size(); | |
2195 | if (ha(pltoff) != 0) | |
2196 | { | |
2197 | write_insn<big_endian>(p, addis_12_2 + ha(pltoff)), p += 4; | |
2198 | write_insn<big_endian>(p, std_2_1 + 40), p += 4; | |
2199 | write_insn<big_endian>(p, ld_11_12 + l(pltoff)), p += 4; | |
2200 | if (ha(pltoff + 16) != ha(pltoff)) | |
2201 | { | |
2202 | write_insn<big_endian>(p, addi_12_12 + l(pltoff)), p += 4; | |
2203 | pltoff = 0; | |
2204 | } | |
2205 | write_insn<big_endian>(p, mtctr_11), p += 4; | |
2206 | write_insn<big_endian>(p, ld_2_12 + l(pltoff + 8)), p += 4; | |
2207 | write_insn<big_endian>(p, ld_11_12 + l(pltoff + 16)), p += 4; | |
2208 | write_insn<big_endian>(p, bctr), p += 4; | |
2209 | } | |
2210 | else | |
2211 | { | |
2212 | write_insn<big_endian>(p, std_2_1 + 40), p += 4; | |
2213 | write_insn<big_endian>(p, ld_11_2 + l(pltoff)), p += 4; | |
2214 | if (ha(pltoff + 16) != ha(pltoff)) | |
2215 | { | |
2216 | write_insn<big_endian>(p, addi_2_2 + l(pltoff)), p += 4; | |
2217 | pltoff = 0; | |
2218 | } | |
2219 | write_insn<big_endian>(p, mtctr_11), p += 4; | |
2220 | write_insn<big_endian>(p, ld_11_2 + l(pltoff + 16)), p += 4; | |
2221 | write_insn<big_endian>(p, ld_2_2 + l(pltoff + 8)), p += 4; | |
2222 | write_insn<big_endian>(p, bctr), p += 4; | |
2223 | } | |
2224 | } | |
2225 | ||
2226 | // Write pltresolve stub. | |
2227 | p = oview + this->pltresolve_; | |
dd93cd0a AM |
2228 | Address after_bcl = this->address() + this->pltresolve_ + 16; |
2229 | Address pltoff = plt_base - after_bcl; | |
cf43a2fe AM |
2230 | |
2231 | elfcpp::Swap<64, big_endian>::writeval(p, pltoff), p += 8; | |
2232 | ||
2233 | write_insn<big_endian>(p, mflr_12), p += 4; | |
2234 | write_insn<big_endian>(p, bcl_20_31), p += 4; | |
2235 | write_insn<big_endian>(p, mflr_11), p += 4; | |
2236 | write_insn<big_endian>(p, ld_2_11 + l(-16)), p += 4; | |
2237 | write_insn<big_endian>(p, mtlr_12), p += 4; | |
2238 | write_insn<big_endian>(p, add_12_2_11), p += 4; | |
2239 | write_insn<big_endian>(p, ld_11_12 + 0), p += 4; | |
2240 | write_insn<big_endian>(p, ld_2_12 + 8), p += 4; | |
2241 | write_insn<big_endian>(p, mtctr_11), p += 4; | |
2242 | write_insn<big_endian>(p, ld_11_12 + 16), p += 4; | |
2243 | write_insn<big_endian>(p, bctr), p += 4; | |
2244 | while (p < oview + this->pltresolve_ + this->pltresolve_size) | |
2245 | write_insn<big_endian>(p, nop), p += 4; | |
2246 | ||
2247 | // Write lazy link call stubs. | |
2248 | uint32_t indx = 0; | |
2249 | while (p < oview + oview_size) | |
2250 | { | |
2251 | if (indx < 0x8000) | |
2252 | { | |
2253 | write_insn<big_endian>(p, li_0_0 + indx), p += 4; | |
2254 | } | |
2255 | else | |
2256 | { | |
2257 | write_insn<big_endian>(p, lis_0_0 + hi(indx)), p += 4; | |
2258 | write_insn<big_endian>(p, ori_0_0_0 + l(indx)), p += 4; | |
2259 | } | |
c9269dff | 2260 | uint32_t branch_off = this->pltresolve_ + 8 - (p - oview); |
cf43a2fe AM |
2261 | write_insn<big_endian>(p, b + (branch_off & 0x3fffffc)), p += 4; |
2262 | indx++; | |
2263 | } | |
2264 | } | |
2265 | else | |
2266 | { | |
dd93cd0a AM |
2267 | // The address of _GLOBAL_OFFSET_TABLE_. |
2268 | Address g_o_t = got->address() + got->g_o_t(); | |
c9269dff | 2269 | |
cf43a2fe AM |
2270 | // Write out call stubs. |
2271 | typename Glink_entries::const_iterator g; | |
2272 | for (g = this->glink_entries_.begin(); | |
2273 | g != this->glink_entries_.end(); | |
2274 | ++g) | |
2275 | { | |
e5d5f5ed AM |
2276 | Address plt_addr; |
2277 | bool is_ifunc; | |
2278 | const Symbol* gsym = g->first.sym_; | |
2279 | if (gsym != NULL) | |
2280 | { | |
2281 | is_ifunc = (gsym->type() == elfcpp::STT_GNU_IFUNC | |
2282 | && gsym->can_use_relative_reloc(false)); | |
2283 | plt_addr = gsym->plt_offset(); | |
2284 | } | |
2285 | else | |
2286 | { | |
2287 | is_ifunc = true; | |
2288 | const Sized_relobj_file<size, big_endian>* relobj | |
2289 | = g->first.object_; | |
2290 | unsigned int local_sym_index = g->first.locsym_; | |
2291 | plt_addr = relobj->local_plt_offset(local_sym_index); | |
2292 | } | |
2293 | if (is_ifunc) | |
2294 | { | |
2295 | if (iplt_base == invalid_address) | |
2296 | iplt_base = this->targ_->iplt_section()->address(); | |
2297 | plt_addr += iplt_base; | |
2298 | } | |
2299 | else | |
2300 | plt_addr += plt_base; | |
cf43a2fe AM |
2301 | |
2302 | p = oview + g->second * this->glink_entry_size(); | |
2303 | if (parameters->options().output_is_position_independent()) | |
2304 | { | |
e5d5f5ed | 2305 | Address got_addr; |
d1a8cabd AM |
2306 | const Powerpc_relobj<size, big_endian>* object = static_cast |
2307 | <const Powerpc_relobj<size, big_endian>*>(g->first.object_); | |
e5d5f5ed | 2308 | if (object != NULL && g->first.addend_ >= 32768) |
d1a8cabd AM |
2309 | { |
2310 | unsigned int got2 = object->got2_shndx(); | |
c9269dff AM |
2311 | got_addr = g->first.object_->get_output_section_offset(got2); |
2312 | gold_assert(got_addr != invalid_address); | |
2313 | got_addr += (g->first.object_->output_section(got2)->address() | |
2314 | + g->first.addend_); | |
d1a8cabd | 2315 | } |
cf43a2fe AM |
2316 | else |
2317 | got_addr = g_o_t; | |
2318 | ||
dd93cd0a | 2319 | Address pltoff = plt_addr - got_addr; |
cf43a2fe AM |
2320 | if (ha(pltoff) == 0) |
2321 | { | |
2322 | write_insn<big_endian>(p + 0, lwz_11_30 + l(pltoff)); | |
2323 | write_insn<big_endian>(p + 4, mtctr_11); | |
2324 | write_insn<big_endian>(p + 8, bctr); | |
2325 | } | |
2326 | else | |
2327 | { | |
2328 | write_insn<big_endian>(p + 0, addis_11_30 + ha(pltoff)); | |
2329 | write_insn<big_endian>(p + 4, lwz_11_11 + l(pltoff)); | |
2330 | write_insn<big_endian>(p + 8, mtctr_11); | |
2331 | write_insn<big_endian>(p + 12, bctr); | |
2332 | } | |
2333 | } | |
2334 | else | |
2335 | { | |
2336 | write_insn<big_endian>(p + 0, lis_11 + ha(plt_addr)); | |
2337 | write_insn<big_endian>(p + 4, lwz_11_11 + l(plt_addr)); | |
2338 | write_insn<big_endian>(p + 8, mtctr_11); | |
2339 | write_insn<big_endian>(p + 12, bctr); | |
2340 | } | |
2341 | } | |
42cacb20 | 2342 | |
cf43a2fe AM |
2343 | // Write out pltresolve branch table. |
2344 | p = oview + this->pltresolve_; | |
2345 | unsigned int the_end = oview_size - this->pltresolve_size; | |
c9269dff | 2346 | unsigned char* end_p = oview + the_end; |
cf43a2fe AM |
2347 | while (p < end_p - 8 * 4) |
2348 | write_insn<big_endian>(p, b + end_p - p), p += 4; | |
2349 | while (p < end_p) | |
2350 | write_insn<big_endian>(p, nop), p += 4; | |
42cacb20 | 2351 | |
cf43a2fe AM |
2352 | // Write out pltresolve call stub. |
2353 | if (parameters->options().output_is_position_independent()) | |
42cacb20 | 2354 | { |
dd93cd0a AM |
2355 | Address res0_off = this->pltresolve_; |
2356 | Address after_bcl_off = the_end + 12; | |
2357 | Address bcl_res0 = after_bcl_off - res0_off; | |
cf43a2fe AM |
2358 | |
2359 | write_insn<big_endian>(p + 0, addis_11_11 + ha(bcl_res0)); | |
2360 | write_insn<big_endian>(p + 4, mflr_0); | |
2361 | write_insn<big_endian>(p + 8, bcl_20_31); | |
2362 | write_insn<big_endian>(p + 12, addi_11_11 + l(bcl_res0)); | |
2363 | write_insn<big_endian>(p + 16, mflr_12); | |
2364 | write_insn<big_endian>(p + 20, mtlr_0); | |
2365 | write_insn<big_endian>(p + 24, sub_11_11_12); | |
2366 | ||
dd93cd0a | 2367 | Address got_bcl = g_o_t + 4 - (after_bcl_off + this->address()); |
cf43a2fe AM |
2368 | |
2369 | write_insn<big_endian>(p + 28, addis_12_12 + ha(got_bcl)); | |
2370 | if (ha(got_bcl) == ha(got_bcl + 4)) | |
2371 | { | |
2372 | write_insn<big_endian>(p + 32, lwz_0_12 + l(got_bcl)); | |
2373 | write_insn<big_endian>(p + 36, lwz_12_12 + l(got_bcl + 4)); | |
2374 | } | |
2375 | else | |
2376 | { | |
2377 | write_insn<big_endian>(p + 32, lwzu_0_12 + l(got_bcl)); | |
2378 | write_insn<big_endian>(p + 36, lwz_12_12 + 4); | |
2379 | } | |
2380 | write_insn<big_endian>(p + 40, mtctr_0); | |
2381 | write_insn<big_endian>(p + 44, add_0_11_11); | |
2382 | write_insn<big_endian>(p + 48, add_11_0_11); | |
2383 | write_insn<big_endian>(p + 52, bctr); | |
2384 | write_insn<big_endian>(p + 56, nop); | |
2385 | write_insn<big_endian>(p + 60, nop); | |
42cacb20 | 2386 | } |
cf43a2fe | 2387 | else |
42cacb20 | 2388 | { |
dd93cd0a | 2389 | Address res0 = this->pltresolve_ + this->address(); |
cf43a2fe AM |
2390 | |
2391 | write_insn<big_endian>(p + 0, lis_12 + ha(g_o_t + 4)); | |
2392 | write_insn<big_endian>(p + 4, addis_11_11 + ha(-res0)); | |
2393 | if (ha(g_o_t + 4) == ha(g_o_t + 8)) | |
2394 | write_insn<big_endian>(p + 8, lwz_0_12 + l(g_o_t + 4)); | |
2395 | else | |
2396 | write_insn<big_endian>(p + 8, lwzu_0_12 + l(g_o_t + 4)); | |
2397 | write_insn<big_endian>(p + 12, addi_11_11 + l(-res0)); | |
2398 | write_insn<big_endian>(p + 16, mtctr_0); | |
2399 | write_insn<big_endian>(p + 20, add_0_11_11); | |
2400 | if (ha(g_o_t + 4) == ha(g_o_t + 8)) | |
2401 | write_insn<big_endian>(p + 24, lwz_12_12 + l(g_o_t + 8)); | |
2402 | else | |
2403 | write_insn<big_endian>(p + 24, lwz_12_12 + 4); | |
2404 | write_insn<big_endian>(p + 28, add_11_0_11); | |
2405 | write_insn<big_endian>(p + 32, bctr); | |
2406 | write_insn<big_endian>(p + 36, nop); | |
2407 | write_insn<big_endian>(p + 40, nop); | |
2408 | write_insn<big_endian>(p + 44, nop); | |
2409 | write_insn<big_endian>(p + 48, nop); | |
2410 | write_insn<big_endian>(p + 52, nop); | |
2411 | write_insn<big_endian>(p + 56, nop); | |
2412 | write_insn<big_endian>(p + 60, nop); | |
42cacb20 | 2413 | } |
cf43a2fe | 2414 | p += 64; |
42cacb20 DE |
2415 | } |
2416 | ||
cf43a2fe AM |
2417 | of->write_output_view(off, oview_size, oview); |
2418 | } | |
2419 | ||
2420 | // Create the glink section. | |
42cacb20 | 2421 | |
cf43a2fe AM |
2422 | template<int size, bool big_endian> |
2423 | void | |
2424 | Target_powerpc<size, big_endian>::make_glink_section(Layout* layout) | |
2425 | { | |
2426 | if (this->glink_ == NULL) | |
2427 | { | |
2428 | this->glink_ = new Output_data_glink<size, big_endian>(this); | |
2429 | layout->add_output_section_data(".text", elfcpp::SHT_PROGBITS, | |
2430 | elfcpp::SHF_ALLOC | elfcpp::SHF_EXECINSTR, | |
2431 | this->glink_, ORDER_TEXT, false); | |
2432 | } | |
42cacb20 DE |
2433 | } |
2434 | ||
2435 | // Create a PLT entry for a global symbol. | |
2436 | ||
2437 | template<int size, bool big_endian> | |
2438 | void | |
d83ce4e3 AM |
2439 | Target_powerpc<size, big_endian>::make_plt_entry( |
2440 | Layout* layout, | |
2441 | Symbol* gsym, | |
2442 | const elfcpp::Rela<size, big_endian>& reloc, | |
e5d5f5ed | 2443 | const Sized_relobj_file<size, big_endian>* object) |
42cacb20 | 2444 | { |
e5d5f5ed AM |
2445 | if (gsym->type() == elfcpp::STT_GNU_IFUNC |
2446 | && gsym->can_use_relative_reloc(false)) | |
2447 | { | |
2448 | if (this->iplt_ == NULL) | |
c9824451 | 2449 | this->make_iplt_section(layout); |
03e25981 | 2450 | this->iplt_->add_ifunc_entry(gsym); |
e5d5f5ed AM |
2451 | } |
2452 | else | |
2453 | { | |
2454 | if (this->plt_ == NULL) | |
2455 | this->make_plt_section(layout); | |
03e25981 | 2456 | this->plt_->add_entry(gsym); |
e5d5f5ed | 2457 | } |
03e25981 | 2458 | this->glink_->add_entry(object, gsym, reloc); |
e5d5f5ed | 2459 | } |
42cacb20 | 2460 | |
e5d5f5ed | 2461 | // Make a PLT entry for a local STT_GNU_IFUNC symbol. |
612a8d3d | 2462 | |
e5d5f5ed AM |
2463 | template<int size, bool big_endian> |
2464 | void | |
2465 | Target_powerpc<size, big_endian>::make_local_ifunc_plt_entry( | |
2466 | Layout* layout, | |
e5d5f5ed AM |
2467 | const elfcpp::Rela<size, big_endian>& reloc, |
2468 | Sized_relobj_file<size, big_endian>* relobj) | |
2469 | { | |
2470 | if (this->iplt_ == NULL) | |
c9824451 | 2471 | this->make_iplt_section(layout); |
e5d5f5ed | 2472 | unsigned int r_sym = elfcpp::elf_r_sym<size>(reloc.get_r_info()); |
03e25981 AM |
2473 | this->iplt_->add_local_ifunc_entry(relobj, r_sym); |
2474 | this->glink_->add_entry(relobj, r_sym, reloc); | |
42cacb20 DE |
2475 | } |
2476 | ||
0e70b911 CC |
2477 | // Return the number of entries in the PLT. |
2478 | ||
2479 | template<int size, bool big_endian> | |
2480 | unsigned int | |
2481 | Target_powerpc<size, big_endian>::plt_entry_count() const | |
2482 | { | |
2483 | if (this->plt_ == NULL) | |
2484 | return 0; | |
e5d5f5ed AM |
2485 | unsigned int count = this->plt_->entry_count(); |
2486 | if (this->iplt_ != NULL) | |
2487 | count += this->iplt_->entry_count(); | |
2488 | return count; | |
0e70b911 CC |
2489 | } |
2490 | ||
2491 | // Return the offset of the first non-reserved PLT entry. | |
2492 | ||
2493 | template<int size, bool big_endian> | |
2494 | unsigned int | |
2495 | Target_powerpc<size, big_endian>::first_plt_entry_offset() const | |
2496 | { | |
e5d5f5ed | 2497 | return this->plt_->first_plt_entry_offset(); |
0e70b911 CC |
2498 | } |
2499 | ||
2500 | // Return the size of each PLT entry. | |
2501 | ||
2502 | template<int size, bool big_endian> | |
2503 | unsigned int | |
2504 | Target_powerpc<size, big_endian>::plt_entry_size() const | |
2505 | { | |
2506 | return Output_data_plt_powerpc<size, big_endian>::get_plt_entry_size(); | |
2507 | } | |
2508 | ||
dd93cd0a | 2509 | // Create a GOT entry for local dynamic __tls_get_addr calls. |
42cacb20 DE |
2510 | |
2511 | template<int size, bool big_endian> | |
2512 | unsigned int | |
dd93cd0a | 2513 | Target_powerpc<size, big_endian>::tlsld_got_offset( |
6fa2a40b CC |
2514 | Symbol_table* symtab, |
2515 | Layout* layout, | |
2516 | Sized_relobj_file<size, big_endian>* object) | |
42cacb20 | 2517 | { |
dd93cd0a | 2518 | if (this->tlsld_got_offset_ == -1U) |
42cacb20 DE |
2519 | { |
2520 | gold_assert(symtab != NULL && layout != NULL && object != NULL); | |
2521 | Reloc_section* rela_dyn = this->rela_dyn_section(layout); | |
dd93cd0a AM |
2522 | Output_data_got_powerpc<size, big_endian>* got |
2523 | = this->got_section(symtab, layout); | |
2524 | unsigned int got_offset = got->add_constant_pair(0, 0); | |
42cacb20 DE |
2525 | rela_dyn->add_local(object, 0, elfcpp::R_POWERPC_DTPMOD, got, |
2526 | got_offset, 0); | |
dd93cd0a | 2527 | this->tlsld_got_offset_ = got_offset; |
42cacb20 | 2528 | } |
dd93cd0a | 2529 | return this->tlsld_got_offset_; |
42cacb20 DE |
2530 | } |
2531 | ||
95a2c8d6 RS |
2532 | // Get the Reference_flags for a particular relocation. |
2533 | ||
2534 | template<int size, bool big_endian> | |
2535 | int | |
d83ce4e3 | 2536 | Target_powerpc<size, big_endian>::Scan::get_reference_flags(unsigned int r_type) |
95a2c8d6 RS |
2537 | { |
2538 | switch (r_type) | |
2539 | { | |
2540 | case elfcpp::R_POWERPC_NONE: | |
2541 | case elfcpp::R_POWERPC_GNU_VTINHERIT: | |
2542 | case elfcpp::R_POWERPC_GNU_VTENTRY: | |
2543 | case elfcpp::R_PPC64_TOC: | |
2544 | // No symbol reference. | |
2545 | return 0; | |
2546 | ||
dd93cd0a AM |
2547 | case elfcpp::R_PPC64_ADDR64: |
2548 | case elfcpp::R_PPC64_UADDR64: | |
2549 | case elfcpp::R_POWERPC_ADDR32: | |
2550 | case elfcpp::R_POWERPC_UADDR32: | |
95a2c8d6 | 2551 | case elfcpp::R_POWERPC_ADDR16: |
dd93cd0a | 2552 | case elfcpp::R_POWERPC_UADDR16: |
95a2c8d6 RS |
2553 | case elfcpp::R_POWERPC_ADDR16_LO: |
2554 | case elfcpp::R_POWERPC_ADDR16_HI: | |
2555 | case elfcpp::R_POWERPC_ADDR16_HA: | |
95a2c8d6 RS |
2556 | return Symbol::ABSOLUTE_REF; |
2557 | ||
dd93cd0a AM |
2558 | case elfcpp::R_POWERPC_ADDR24: |
2559 | case elfcpp::R_POWERPC_ADDR14: | |
2560 | case elfcpp::R_POWERPC_ADDR14_BRTAKEN: | |
2561 | case elfcpp::R_POWERPC_ADDR14_BRNTAKEN: | |
2562 | return Symbol::FUNCTION_CALL | Symbol::ABSOLUTE_REF; | |
2563 | ||
e5d5f5ed | 2564 | case elfcpp::R_PPC64_REL64: |
dd93cd0a | 2565 | case elfcpp::R_POWERPC_REL32: |
95a2c8d6 | 2566 | case elfcpp::R_PPC_LOCAL24PC: |
6ce78956 AM |
2567 | case elfcpp::R_POWERPC_REL16: |
2568 | case elfcpp::R_POWERPC_REL16_LO: | |
2569 | case elfcpp::R_POWERPC_REL16_HI: | |
2570 | case elfcpp::R_POWERPC_REL16_HA: | |
95a2c8d6 RS |
2571 | return Symbol::RELATIVE_REF; |
2572 | ||
dd93cd0a | 2573 | case elfcpp::R_POWERPC_REL24: |
95a2c8d6 | 2574 | case elfcpp::R_PPC_PLTREL24: |
dd93cd0a AM |
2575 | case elfcpp::R_POWERPC_REL14: |
2576 | case elfcpp::R_POWERPC_REL14_BRTAKEN: | |
2577 | case elfcpp::R_POWERPC_REL14_BRNTAKEN: | |
95a2c8d6 RS |
2578 | return Symbol::FUNCTION_CALL | Symbol::RELATIVE_REF; |
2579 | ||
2580 | case elfcpp::R_POWERPC_GOT16: | |
2581 | case elfcpp::R_POWERPC_GOT16_LO: | |
2582 | case elfcpp::R_POWERPC_GOT16_HI: | |
2583 | case elfcpp::R_POWERPC_GOT16_HA: | |
e5d5f5ed AM |
2584 | case elfcpp::R_PPC64_GOT16_DS: |
2585 | case elfcpp::R_PPC64_GOT16_LO_DS: | |
95a2c8d6 RS |
2586 | case elfcpp::R_PPC64_TOC16: |
2587 | case elfcpp::R_PPC64_TOC16_LO: | |
2588 | case elfcpp::R_PPC64_TOC16_HI: | |
2589 | case elfcpp::R_PPC64_TOC16_HA: | |
2590 | case elfcpp::R_PPC64_TOC16_DS: | |
2591 | case elfcpp::R_PPC64_TOC16_LO_DS: | |
2592 | // Absolute in GOT. | |
2593 | return Symbol::ABSOLUTE_REF; | |
2594 | ||
2595 | case elfcpp::R_POWERPC_GOT_TPREL16: | |
2596 | case elfcpp::R_POWERPC_TLS: | |
2597 | return Symbol::TLS_REF; | |
2598 | ||
2599 | case elfcpp::R_POWERPC_COPY: | |
2600 | case elfcpp::R_POWERPC_GLOB_DAT: | |
2601 | case elfcpp::R_POWERPC_JMP_SLOT: | |
2602 | case elfcpp::R_POWERPC_RELATIVE: | |
2603 | case elfcpp::R_POWERPC_DTPMOD: | |
2604 | default: | |
2605 | // Not expected. We will give an error later. | |
2606 | return 0; | |
2607 | } | |
2608 | } | |
2609 | ||
42cacb20 DE |
2610 | // Report an unsupported relocation against a local symbol. |
2611 | ||
2612 | template<int size, bool big_endian> | |
2613 | void | |
2614 | Target_powerpc<size, big_endian>::Scan::unsupported_reloc_local( | |
d83ce4e3 AM |
2615 | Sized_relobj_file<size, big_endian>* object, |
2616 | unsigned int r_type) | |
42cacb20 DE |
2617 | { |
2618 | gold_error(_("%s: unsupported reloc %u against local symbol"), | |
2619 | object->name().c_str(), r_type); | |
2620 | } | |
2621 | ||
2622 | // We are about to emit a dynamic relocation of type R_TYPE. If the | |
2623 | // dynamic linker does not support it, issue an error. | |
2624 | ||
2625 | template<int size, bool big_endian> | |
2626 | void | |
2627 | Target_powerpc<size, big_endian>::Scan::check_non_pic(Relobj* object, | |
2628 | unsigned int r_type) | |
2629 | { | |
2630 | gold_assert(r_type != elfcpp::R_POWERPC_NONE); | |
2631 | ||
2632 | // These are the relocation types supported by glibc for both 32-bit | |
2633 | // and 64-bit powerpc. | |
2634 | switch (r_type) | |
2635 | { | |
3ea0a085 | 2636 | case elfcpp::R_POWERPC_NONE: |
42cacb20 DE |
2637 | case elfcpp::R_POWERPC_RELATIVE: |
2638 | case elfcpp::R_POWERPC_GLOB_DAT: | |
2639 | case elfcpp::R_POWERPC_DTPMOD: | |
2640 | case elfcpp::R_POWERPC_DTPREL: | |
2641 | case elfcpp::R_POWERPC_TPREL: | |
2642 | case elfcpp::R_POWERPC_JMP_SLOT: | |
2643 | case elfcpp::R_POWERPC_COPY: | |
3ea0a085 | 2644 | case elfcpp::R_POWERPC_IRELATIVE: |
42cacb20 | 2645 | case elfcpp::R_POWERPC_ADDR32: |
3ea0a085 | 2646 | case elfcpp::R_POWERPC_UADDR32: |
42cacb20 | 2647 | case elfcpp::R_POWERPC_ADDR24: |
3ea0a085 AM |
2648 | case elfcpp::R_POWERPC_ADDR16: |
2649 | case elfcpp::R_POWERPC_UADDR16: | |
2650 | case elfcpp::R_POWERPC_ADDR16_LO: | |
2651 | case elfcpp::R_POWERPC_ADDR16_HI: | |
2652 | case elfcpp::R_POWERPC_ADDR16_HA: | |
2653 | case elfcpp::R_POWERPC_ADDR14: | |
2654 | case elfcpp::R_POWERPC_ADDR14_BRTAKEN: | |
2655 | case elfcpp::R_POWERPC_ADDR14_BRNTAKEN: | |
2656 | case elfcpp::R_POWERPC_REL32: | |
42cacb20 | 2657 | case elfcpp::R_POWERPC_REL24: |
3ea0a085 AM |
2658 | case elfcpp::R_POWERPC_TPREL16: |
2659 | case elfcpp::R_POWERPC_TPREL16_LO: | |
2660 | case elfcpp::R_POWERPC_TPREL16_HI: | |
2661 | case elfcpp::R_POWERPC_TPREL16_HA: | |
42cacb20 DE |
2662 | return; |
2663 | ||
2664 | default: | |
2665 | break; | |
2666 | } | |
2667 | ||
2668 | if (size == 64) | |
2669 | { | |
2670 | switch (r_type) | |
2671 | { | |
2672 | // These are the relocation types supported only on 64-bit. | |
2673 | case elfcpp::R_PPC64_ADDR64: | |
42cacb20 | 2674 | case elfcpp::R_PPC64_UADDR64: |
3ea0a085 | 2675 | case elfcpp::R_PPC64_JMP_IREL: |
42cacb20 | 2676 | case elfcpp::R_PPC64_ADDR16_DS: |
3ea0a085 | 2677 | case elfcpp::R_PPC64_ADDR16_LO_DS: |
42cacb20 DE |
2678 | case elfcpp::R_PPC64_ADDR16_HIGHER: |
2679 | case elfcpp::R_PPC64_ADDR16_HIGHEST: | |
2680 | case elfcpp::R_PPC64_ADDR16_HIGHERA: | |
2681 | case elfcpp::R_PPC64_ADDR16_HIGHESTA: | |
42cacb20 | 2682 | case elfcpp::R_PPC64_REL64: |
3ea0a085 AM |
2683 | case elfcpp::R_POWERPC_ADDR30: |
2684 | case elfcpp::R_PPC64_TPREL16_DS: | |
2685 | case elfcpp::R_PPC64_TPREL16_LO_DS: | |
2686 | case elfcpp::R_PPC64_TPREL16_HIGHER: | |
2687 | case elfcpp::R_PPC64_TPREL16_HIGHEST: | |
2688 | case elfcpp::R_PPC64_TPREL16_HIGHERA: | |
2689 | case elfcpp::R_PPC64_TPREL16_HIGHESTA: | |
42cacb20 DE |
2690 | return; |
2691 | ||
2692 | default: | |
2693 | break; | |
2694 | } | |
2695 | } | |
2696 | else | |
2697 | { | |
2698 | switch (r_type) | |
2699 | { | |
2700 | // These are the relocation types supported only on 32-bit. | |
3ea0a085 AM |
2701 | // ??? glibc ld.so doesn't need to support these. |
2702 | case elfcpp::R_POWERPC_DTPREL16: | |
2703 | case elfcpp::R_POWERPC_DTPREL16_LO: | |
2704 | case elfcpp::R_POWERPC_DTPREL16_HI: | |
2705 | case elfcpp::R_POWERPC_DTPREL16_HA: | |
2706 | return; | |
42cacb20 DE |
2707 | |
2708 | default: | |
2709 | break; | |
2710 | } | |
2711 | } | |
2712 | ||
2713 | // This prevents us from issuing more than one error per reloc | |
2714 | // section. But we can still wind up issuing more than one | |
2715 | // error per object file. | |
2716 | if (this->issued_non_pic_error_) | |
2717 | return; | |
33aea2fd | 2718 | gold_assert(parameters->options().output_is_position_independent()); |
42cacb20 DE |
2719 | object->error(_("requires unsupported dynamic reloc; " |
2720 | "recompile with -fPIC")); | |
2721 | this->issued_non_pic_error_ = true; | |
2722 | return; | |
2723 | } | |
2724 | ||
e5d5f5ed AM |
2725 | // Return whether we need to make a PLT entry for a relocation of the |
2726 | // given type against a STT_GNU_IFUNC symbol. | |
2727 | ||
2728 | template<int size, bool big_endian> | |
2729 | bool | |
2730 | Target_powerpc<size, big_endian>::Scan::reloc_needs_plt_for_ifunc( | |
2731 | Sized_relobj_file<size, big_endian>* object, | |
2732 | unsigned int r_type) | |
2733 | { | |
c9824451 AM |
2734 | // In non-pic code any reference will resolve to the plt call stub |
2735 | // for the ifunc symbol. | |
2736 | if (size == 32 && !parameters->options().output_is_position_independent()) | |
2737 | return true; | |
2738 | ||
e5d5f5ed AM |
2739 | switch (r_type) |
2740 | { | |
2741 | // Word size refs from data sections are OK. | |
2742 | case elfcpp::R_POWERPC_ADDR32: | |
2743 | case elfcpp::R_POWERPC_UADDR32: | |
2744 | if (size == 32) | |
2745 | return true; | |
2746 | break; | |
2747 | ||
2748 | case elfcpp::R_PPC64_ADDR64: | |
2749 | case elfcpp::R_PPC64_UADDR64: | |
2750 | if (size == 64) | |
2751 | return true; | |
2752 | break; | |
2753 | ||
2754 | // GOT refs are good. | |
2755 | case elfcpp::R_POWERPC_GOT16: | |
2756 | case elfcpp::R_POWERPC_GOT16_LO: | |
2757 | case elfcpp::R_POWERPC_GOT16_HI: | |
2758 | case elfcpp::R_POWERPC_GOT16_HA: | |
2759 | case elfcpp::R_PPC64_GOT16_DS: | |
2760 | case elfcpp::R_PPC64_GOT16_LO_DS: | |
2761 | return true; | |
2762 | ||
2763 | // So are function calls. | |
2764 | case elfcpp::R_POWERPC_ADDR24: | |
2765 | case elfcpp::R_POWERPC_ADDR14: | |
2766 | case elfcpp::R_POWERPC_ADDR14_BRTAKEN: | |
2767 | case elfcpp::R_POWERPC_ADDR14_BRNTAKEN: | |
2768 | case elfcpp::R_POWERPC_REL24: | |
2769 | case elfcpp::R_PPC_PLTREL24: | |
2770 | case elfcpp::R_POWERPC_REL14: | |
2771 | case elfcpp::R_POWERPC_REL14_BRTAKEN: | |
2772 | case elfcpp::R_POWERPC_REL14_BRNTAKEN: | |
2773 | return true; | |
2774 | ||
2775 | default: | |
2776 | break; | |
2777 | } | |
2778 | ||
2779 | // Anything else is a problem. | |
2780 | // If we are building a static executable, the libc startup function | |
2781 | // responsible for applying indirect function relocations is going | |
2782 | // to complain about the reloc type. | |
2783 | // If we are building a dynamic executable, we will have a text | |
2784 | // relocation. The dynamic loader will set the text segment | |
2785 | // writable and non-executable to apply text relocations. So we'll | |
2786 | // segfault when trying to run the indirection function to resolve | |
2787 | // the reloc. | |
2788 | gold_error(_("%s: unsupported reloc %u for IFUNC symbol"), | |
2789 | object->name().c_str(), r_type); | |
2790 | return false; | |
2791 | } | |
2792 | ||
42cacb20 DE |
2793 | // Scan a relocation for a local symbol. |
2794 | ||
2795 | template<int size, bool big_endian> | |
2796 | inline void | |
2797 | Target_powerpc<size, big_endian>::Scan::local( | |
d83ce4e3 AM |
2798 | Symbol_table* symtab, |
2799 | Layout* layout, | |
2800 | Target_powerpc<size, big_endian>* target, | |
2801 | Sized_relobj_file<size, big_endian>* object, | |
2802 | unsigned int data_shndx, | |
2803 | Output_section* output_section, | |
2804 | const elfcpp::Rela<size, big_endian>& reloc, | |
2805 | unsigned int r_type, | |
e5d5f5ed | 2806 | const elfcpp::Sym<size, big_endian>& lsym, |
bfdfa4cd | 2807 | bool is_discarded) |
42cacb20 | 2808 | { |
dd93cd0a AM |
2809 | Powerpc_relobj<size, big_endian>* ppc_object |
2810 | = static_cast<Powerpc_relobj<size, big_endian>*>(object); | |
2811 | ||
bfdfa4cd AM |
2812 | if (is_discarded) |
2813 | { | |
2814 | if (size == 64 | |
2815 | && data_shndx == ppc_object->opd_shndx() | |
2816 | && r_type == elfcpp::R_PPC64_ADDR64) | |
2817 | ppc_object->set_opd_discard(reloc.get_r_offset()); | |
2818 | return; | |
2819 | } | |
2820 | ||
e5d5f5ed AM |
2821 | // A local STT_GNU_IFUNC symbol may require a PLT entry. |
2822 | bool is_ifunc = lsym.get_st_type() == elfcpp::STT_GNU_IFUNC; | |
2823 | if (is_ifunc && this->reloc_needs_plt_for_ifunc(object, r_type)) | |
c9824451 | 2824 | target->make_local_ifunc_plt_entry(layout, reloc, object); |
e5d5f5ed | 2825 | |
42cacb20 DE |
2826 | switch (r_type) |
2827 | { | |
2828 | case elfcpp::R_POWERPC_NONE: | |
2829 | case elfcpp::R_POWERPC_GNU_VTINHERIT: | |
2830 | case elfcpp::R_POWERPC_GNU_VTENTRY: | |
6ce78956 | 2831 | case elfcpp::R_PPC64_TOCSAVE: |
dd93cd0a | 2832 | case elfcpp::R_PPC_EMB_MRKREF: |
7404fe1b | 2833 | case elfcpp::R_POWERPC_TLS: |
dd93cd0a AM |
2834 | break; |
2835 | ||
2836 | case elfcpp::R_PPC64_TOC: | |
2837 | { | |
2838 | Output_data_got_powerpc<size, big_endian>* got | |
2839 | = target->got_section(symtab, layout); | |
2840 | if (parameters->options().output_is_position_independent()) | |
2841 | { | |
bfdfa4cd AM |
2842 | Address off = reloc.get_r_offset(); |
2843 | if (size == 64 | |
2844 | && data_shndx == ppc_object->opd_shndx() | |
2845 | && ppc_object->get_opd_discard(off - 8)) | |
2846 | break; | |
2847 | ||
dd93cd0a | 2848 | Reloc_section* rela_dyn = target->rela_dyn_section(layout); |
bfdfa4cd | 2849 | Powerpc_relobj<size, big_endian>* symobj = ppc_object; |
dd93cd0a AM |
2850 | rela_dyn->add_output_section_relative(got->output_section(), |
2851 | elfcpp::R_POWERPC_RELATIVE, | |
2852 | output_section, | |
bfdfa4cd AM |
2853 | object, data_shndx, off, |
2854 | symobj->toc_base_offset()); | |
dd93cd0a AM |
2855 | } |
2856 | } | |
42cacb20 DE |
2857 | break; |
2858 | ||
2859 | case elfcpp::R_PPC64_ADDR64: | |
dd93cd0a | 2860 | case elfcpp::R_PPC64_UADDR64: |
42cacb20 | 2861 | case elfcpp::R_POWERPC_ADDR32: |
dd93cd0a AM |
2862 | case elfcpp::R_POWERPC_UADDR32: |
2863 | case elfcpp::R_POWERPC_ADDR24: | |
c9269dff | 2864 | case elfcpp::R_POWERPC_ADDR16: |
42cacb20 | 2865 | case elfcpp::R_POWERPC_ADDR16_LO: |
c9269dff AM |
2866 | case elfcpp::R_POWERPC_ADDR16_HI: |
2867 | case elfcpp::R_POWERPC_ADDR16_HA: | |
dd93cd0a AM |
2868 | case elfcpp::R_POWERPC_UADDR16: |
2869 | case elfcpp::R_PPC64_ADDR16_HIGHER: | |
2870 | case elfcpp::R_PPC64_ADDR16_HIGHERA: | |
2871 | case elfcpp::R_PPC64_ADDR16_HIGHEST: | |
2872 | case elfcpp::R_PPC64_ADDR16_HIGHESTA: | |
2873 | case elfcpp::R_PPC64_ADDR16_DS: | |
2874 | case elfcpp::R_PPC64_ADDR16_LO_DS: | |
2875 | case elfcpp::R_POWERPC_ADDR14: | |
2876 | case elfcpp::R_POWERPC_ADDR14_BRTAKEN: | |
2877 | case elfcpp::R_POWERPC_ADDR14_BRNTAKEN: | |
42cacb20 DE |
2878 | // If building a shared library (or a position-independent |
2879 | // executable), we need to create a dynamic relocation for | |
2880 | // this location. | |
c9824451 AM |
2881 | if (parameters->options().output_is_position_independent() |
2882 | || (size == 64 && is_ifunc)) | |
2e702c99 RM |
2883 | { |
2884 | Reloc_section* rela_dyn = target->rela_dyn_section(layout); | |
42cacb20 | 2885 | |
dd93cd0a AM |
2886 | if ((size == 32 && r_type == elfcpp::R_POWERPC_ADDR32) |
2887 | || (size == 64 && r_type == elfcpp::R_PPC64_ADDR64)) | |
2e702c99 RM |
2888 | { |
2889 | unsigned int r_sym = elfcpp::elf_r_sym<size>(reloc.get_r_info()); | |
e5d5f5ed AM |
2890 | unsigned int dynrel = elfcpp::R_POWERPC_RELATIVE; |
2891 | if (is_ifunc) | |
2892 | { | |
2893 | rela_dyn = target->iplt_section()->rel_plt(); | |
2894 | dynrel = elfcpp::R_POWERPC_IRELATIVE; | |
2895 | } | |
2896 | rela_dyn->add_local_relative(object, r_sym, dynrel, | |
dd93cd0a AM |
2897 | output_section, data_shndx, |
2898 | reloc.get_r_offset(), | |
c9824451 | 2899 | reloc.get_r_addend(), false); |
2e702c99 RM |
2900 | } |
2901 | else | |
2902 | { | |
dd93cd0a | 2903 | check_non_pic(object, r_type); |
42cacb20 | 2904 | unsigned int r_sym = elfcpp::elf_r_sym<size>(reloc.get_r_info()); |
dd93cd0a AM |
2905 | rela_dyn->add_local(object, r_sym, r_type, output_section, |
2906 | data_shndx, reloc.get_r_offset(), | |
2907 | reloc.get_r_addend()); | |
2e702c99 RM |
2908 | } |
2909 | } | |
42cacb20 DE |
2910 | break; |
2911 | ||
3ea0a085 | 2912 | case elfcpp::R_PPC64_REL64: |
dd93cd0a | 2913 | case elfcpp::R_POWERPC_REL32: |
42cacb20 | 2914 | case elfcpp::R_POWERPC_REL24: |
c9824451 | 2915 | case elfcpp::R_PPC_PLTREL24: |
42cacb20 | 2916 | case elfcpp::R_PPC_LOCAL24PC: |
dd93cd0a | 2917 | case elfcpp::R_POWERPC_REL16: |
6ce78956 | 2918 | case elfcpp::R_POWERPC_REL16_LO: |
dd93cd0a | 2919 | case elfcpp::R_POWERPC_REL16_HI: |
6ce78956 | 2920 | case elfcpp::R_POWERPC_REL16_HA: |
dd93cd0a AM |
2921 | case elfcpp::R_POWERPC_REL14: |
2922 | case elfcpp::R_POWERPC_REL14_BRTAKEN: | |
2923 | case elfcpp::R_POWERPC_REL14_BRNTAKEN: | |
2924 | case elfcpp::R_POWERPC_SECTOFF: | |
2925 | case elfcpp::R_POWERPC_TPREL16: | |
2926 | case elfcpp::R_POWERPC_DTPREL16: | |
2927 | case elfcpp::R_POWERPC_SECTOFF_LO: | |
2928 | case elfcpp::R_POWERPC_TPREL16_LO: | |
2929 | case elfcpp::R_POWERPC_DTPREL16_LO: | |
2930 | case elfcpp::R_POWERPC_SECTOFF_HI: | |
2931 | case elfcpp::R_POWERPC_TPREL16_HI: | |
2932 | case elfcpp::R_POWERPC_DTPREL16_HI: | |
2933 | case elfcpp::R_POWERPC_SECTOFF_HA: | |
2934 | case elfcpp::R_POWERPC_TPREL16_HA: | |
2935 | case elfcpp::R_POWERPC_DTPREL16_HA: | |
2936 | case elfcpp::R_PPC64_DTPREL16_HIGHER: | |
2937 | case elfcpp::R_PPC64_TPREL16_HIGHER: | |
2938 | case elfcpp::R_PPC64_DTPREL16_HIGHERA: | |
2939 | case elfcpp::R_PPC64_TPREL16_HIGHERA: | |
2940 | case elfcpp::R_PPC64_DTPREL16_HIGHEST: | |
2941 | case elfcpp::R_PPC64_TPREL16_HIGHEST: | |
2942 | case elfcpp::R_PPC64_DTPREL16_HIGHESTA: | |
2943 | case elfcpp::R_PPC64_TPREL16_HIGHESTA: | |
2944 | case elfcpp::R_PPC64_TPREL16_DS: | |
2945 | case elfcpp::R_PPC64_TPREL16_LO_DS: | |
2946 | case elfcpp::R_PPC64_DTPREL16_DS: | |
2947 | case elfcpp::R_PPC64_DTPREL16_LO_DS: | |
2948 | case elfcpp::R_PPC64_SECTOFF_DS: | |
2949 | case elfcpp::R_PPC64_SECTOFF_LO_DS: | |
2950 | case elfcpp::R_PPC64_TLSGD: | |
2951 | case elfcpp::R_PPC64_TLSLD: | |
42cacb20 DE |
2952 | break; |
2953 | ||
2954 | case elfcpp::R_POWERPC_GOT16: | |
2955 | case elfcpp::R_POWERPC_GOT16_LO: | |
2956 | case elfcpp::R_POWERPC_GOT16_HI: | |
2957 | case elfcpp::R_POWERPC_GOT16_HA: | |
dd93cd0a AM |
2958 | case elfcpp::R_PPC64_GOT16_DS: |
2959 | case elfcpp::R_PPC64_GOT16_LO_DS: | |
42cacb20 | 2960 | { |
c9269dff | 2961 | // The symbol requires a GOT entry. |
dd93cd0a AM |
2962 | Output_data_got_powerpc<size, big_endian>* got |
2963 | = target->got_section(symtab, layout); | |
2964 | unsigned int r_sym = elfcpp::elf_r_sym<size>(reloc.get_r_info()); | |
42cacb20 | 2965 | |
e5d5f5ed | 2966 | if (!parameters->options().output_is_position_independent()) |
42cacb20 | 2967 | { |
e5d5f5ed AM |
2968 | if (size == 32 && is_ifunc) |
2969 | got->add_local_plt(object, r_sym, GOT_TYPE_STANDARD); | |
2970 | else | |
2971 | got->add_local(object, r_sym, GOT_TYPE_STANDARD); | |
2972 | } | |
2973 | else if (!object->local_has_got_offset(r_sym, GOT_TYPE_STANDARD)) | |
2974 | { | |
2975 | // If we are generating a shared object or a pie, this | |
2976 | // symbol's GOT entry will be set by a dynamic relocation. | |
2977 | unsigned int off; | |
2978 | off = got->add_constant(0); | |
2979 | object->set_local_got_offset(r_sym, GOT_TYPE_STANDARD, off); | |
42cacb20 | 2980 | |
e5d5f5ed AM |
2981 | Reloc_section* rela_dyn = target->rela_dyn_section(layout); |
2982 | unsigned int dynrel = elfcpp::R_POWERPC_RELATIVE; | |
2983 | if (is_ifunc) | |
2984 | { | |
2985 | rela_dyn = target->iplt_section()->rel_plt(); | |
2986 | dynrel = elfcpp::R_POWERPC_IRELATIVE; | |
42cacb20 | 2987 | } |
e5d5f5ed | 2988 | rela_dyn->add_local_relative(object, r_sym, dynrel, |
c9824451 | 2989 | got, off, 0, false); |
2e702c99 | 2990 | } |
42cacb20 DE |
2991 | } |
2992 | break; | |
2993 | ||
cf43a2fe AM |
2994 | case elfcpp::R_PPC64_TOC16: |
2995 | case elfcpp::R_PPC64_TOC16_LO: | |
2996 | case elfcpp::R_PPC64_TOC16_HI: | |
2997 | case elfcpp::R_PPC64_TOC16_HA: | |
2998 | case elfcpp::R_PPC64_TOC16_DS: | |
2999 | case elfcpp::R_PPC64_TOC16_LO_DS: | |
42cacb20 DE |
3000 | // We need a GOT section. |
3001 | target->got_section(symtab, layout); | |
3002 | break; | |
3003 | ||
dd93cd0a AM |
3004 | case elfcpp::R_POWERPC_GOT_TLSGD16: |
3005 | case elfcpp::R_POWERPC_GOT_TLSGD16_LO: | |
3006 | case elfcpp::R_POWERPC_GOT_TLSGD16_HI: | |
3007 | case elfcpp::R_POWERPC_GOT_TLSGD16_HA: | |
3008 | { | |
3009 | const tls::Tls_optimization tls_type = target->optimize_tls_gd(true); | |
3010 | if (tls_type == tls::TLSOPT_NONE) | |
3011 | { | |
3012 | Output_data_got_powerpc<size, big_endian>* got | |
3013 | = target->got_section(symtab, layout); | |
3014 | unsigned int r_sym = elfcpp::elf_r_sym<size>(reloc.get_r_info()); | |
bd73a62d AM |
3015 | Reloc_section* rela_dyn = target->rela_dyn_section(layout); |
3016 | got->add_local_tls_pair(object, r_sym, GOT_TYPE_TLSGD, | |
3017 | rela_dyn, elfcpp::R_POWERPC_DTPMOD); | |
dd93cd0a AM |
3018 | } |
3019 | else if (tls_type == tls::TLSOPT_TO_LE) | |
3020 | { | |
3021 | // no GOT relocs needed for Local Exec. | |
3022 | } | |
3023 | else | |
3024 | gold_unreachable(); | |
3025 | } | |
42cacb20 DE |
3026 | break; |
3027 | ||
dd93cd0a AM |
3028 | case elfcpp::R_POWERPC_GOT_TLSLD16: |
3029 | case elfcpp::R_POWERPC_GOT_TLSLD16_LO: | |
3030 | case elfcpp::R_POWERPC_GOT_TLSLD16_HI: | |
3031 | case elfcpp::R_POWERPC_GOT_TLSLD16_HA: | |
3032 | { | |
3033 | const tls::Tls_optimization tls_type = target->optimize_tls_ld(); | |
3034 | if (tls_type == tls::TLSOPT_NONE) | |
3035 | target->tlsld_got_offset(symtab, layout, object); | |
3036 | else if (tls_type == tls::TLSOPT_TO_LE) | |
3037 | { | |
3038 | // no GOT relocs needed for Local Exec. | |
7404fe1b AM |
3039 | if (parameters->options().emit_relocs()) |
3040 | { | |
3041 | Output_section* os = layout->tls_segment()->first_section(); | |
3042 | gold_assert(os != NULL); | |
3043 | os->set_needs_symtab_index(); | |
3044 | } | |
dd93cd0a AM |
3045 | } |
3046 | else | |
3047 | gold_unreachable(); | |
3048 | } | |
42cacb20 | 3049 | break; |
42cacb20 | 3050 | |
dd93cd0a AM |
3051 | case elfcpp::R_POWERPC_GOT_DTPREL16: |
3052 | case elfcpp::R_POWERPC_GOT_DTPREL16_LO: | |
3053 | case elfcpp::R_POWERPC_GOT_DTPREL16_HI: | |
3054 | case elfcpp::R_POWERPC_GOT_DTPREL16_HA: | |
3055 | { | |
3056 | Output_data_got_powerpc<size, big_endian>* got | |
3057 | = target->got_section(symtab, layout); | |
3058 | unsigned int r_sym = elfcpp::elf_r_sym<size>(reloc.get_r_info()); | |
bd73a62d | 3059 | got->add_local_tls(object, r_sym, GOT_TYPE_DTPREL); |
dd93cd0a AM |
3060 | } |
3061 | break; | |
42cacb20 | 3062 | |
dd93cd0a AM |
3063 | case elfcpp::R_POWERPC_GOT_TPREL16: |
3064 | case elfcpp::R_POWERPC_GOT_TPREL16_LO: | |
3065 | case elfcpp::R_POWERPC_GOT_TPREL16_HI: | |
3066 | case elfcpp::R_POWERPC_GOT_TPREL16_HA: | |
3067 | { | |
3068 | const tls::Tls_optimization tls_type = target->optimize_tls_ie(true); | |
3069 | if (tls_type == tls::TLSOPT_NONE) | |
3070 | { | |
3071 | Output_data_got_powerpc<size, big_endian>* got | |
3072 | = target->got_section(symtab, layout); | |
3073 | unsigned int r_sym = elfcpp::elf_r_sym<size>(reloc.get_r_info()); | |
bd73a62d | 3074 | got->add_local_tls(object, r_sym, GOT_TYPE_TPREL); |
dd93cd0a AM |
3075 | } |
3076 | else if (tls_type == tls::TLSOPT_TO_LE) | |
3077 | { | |
3078 | // no GOT relocs needed for Local Exec. | |
3079 | } | |
3080 | else | |
3081 | gold_unreachable(); | |
3082 | } | |
3083 | break; | |
3084 | ||
3085 | default: | |
3086 | unsupported_reloc_local(object, r_type); | |
3087 | break; | |
3088 | } | |
3089 | } | |
3090 | ||
3091 | // Report an unsupported relocation against a global symbol. | |
3092 | ||
3093 | template<int size, bool big_endian> | |
3094 | void | |
3095 | Target_powerpc<size, big_endian>::Scan::unsupported_reloc_global( | |
3096 | Sized_relobj_file<size, big_endian>* object, | |
3097 | unsigned int r_type, | |
3098 | Symbol* gsym) | |
3099 | { | |
42cacb20 DE |
3100 | gold_error(_("%s: unsupported reloc %u against global symbol %s"), |
3101 | object->name().c_str(), r_type, gsym->demangled_name().c_str()); | |
3102 | } | |
3103 | ||
3104 | // Scan a relocation for a global symbol. | |
3105 | ||
3106 | template<int size, bool big_endian> | |
3107 | inline void | |
3108 | Target_powerpc<size, big_endian>::Scan::global( | |
d83ce4e3 AM |
3109 | Symbol_table* symtab, |
3110 | Layout* layout, | |
3111 | Target_powerpc<size, big_endian>* target, | |
3112 | Sized_relobj_file<size, big_endian>* object, | |
3113 | unsigned int data_shndx, | |
3114 | Output_section* output_section, | |
3115 | const elfcpp::Rela<size, big_endian>& reloc, | |
3116 | unsigned int r_type, | |
3117 | Symbol* gsym) | |
42cacb20 | 3118 | { |
dd93cd0a AM |
3119 | Powerpc_relobj<size, big_endian>* ppc_object |
3120 | = static_cast<Powerpc_relobj<size, big_endian>*>(object); | |
3121 | ||
e5d5f5ed AM |
3122 | // A STT_GNU_IFUNC symbol may require a PLT entry. |
3123 | if (gsym->type() == elfcpp::STT_GNU_IFUNC | |
3124 | && this->reloc_needs_plt_for_ifunc(object, r_type)) | |
c9824451 | 3125 | target->make_plt_entry(layout, gsym, reloc, object); |
e5d5f5ed | 3126 | |
42cacb20 DE |
3127 | switch (r_type) |
3128 | { | |
3129 | case elfcpp::R_POWERPC_NONE: | |
3130 | case elfcpp::R_POWERPC_GNU_VTINHERIT: | |
3131 | case elfcpp::R_POWERPC_GNU_VTENTRY: | |
cf43a2fe | 3132 | case elfcpp::R_PPC_LOCAL24PC: |
dd93cd0a | 3133 | case elfcpp::R_PPC_EMB_MRKREF: |
7404fe1b | 3134 | case elfcpp::R_POWERPC_TLS: |
dd93cd0a AM |
3135 | break; |
3136 | ||
3137 | case elfcpp::R_PPC64_TOC: | |
3138 | { | |
3139 | Output_data_got_powerpc<size, big_endian>* got | |
3140 | = target->got_section(symtab, layout); | |
3141 | if (parameters->options().output_is_position_independent()) | |
3142 | { | |
bfdfa4cd AM |
3143 | Address off = reloc.get_r_offset(); |
3144 | if (size == 64 | |
3145 | && data_shndx == ppc_object->opd_shndx() | |
3146 | && ppc_object->get_opd_discard(off - 8)) | |
3147 | break; | |
3148 | ||
dd93cd0a AM |
3149 | Reloc_section* rela_dyn = target->rela_dyn_section(layout); |
3150 | Powerpc_relobj<size, big_endian>* symobj = ppc_object; | |
3151 | if (data_shndx != ppc_object->opd_shndx()) | |
3152 | symobj = static_cast | |
3153 | <Powerpc_relobj<size, big_endian>*>(gsym->object()); | |
3154 | rela_dyn->add_output_section_relative(got->output_section(), | |
3155 | elfcpp::R_POWERPC_RELATIVE, | |
3156 | output_section, | |
bfdfa4cd | 3157 | object, data_shndx, off, |
dd93cd0a AM |
3158 | symobj->toc_base_offset()); |
3159 | } | |
3160 | } | |
42cacb20 DE |
3161 | break; |
3162 | ||
c9269dff | 3163 | case elfcpp::R_PPC64_ADDR64: |
bfdfa4cd AM |
3164 | if (size == 64 |
3165 | && data_shndx == ppc_object->opd_shndx() | |
3166 | && (gsym->is_defined_in_discarded_section() | |
3167 | || gsym->object() != object)) | |
3168 | { | |
3169 | ppc_object->set_opd_discard(reloc.get_r_offset()); | |
3170 | break; | |
3171 | } | |
3172 | // Fall thru | |
dd93cd0a | 3173 | case elfcpp::R_PPC64_UADDR64: |
c9269dff | 3174 | case elfcpp::R_POWERPC_ADDR32: |
dd93cd0a AM |
3175 | case elfcpp::R_POWERPC_UADDR32: |
3176 | case elfcpp::R_POWERPC_ADDR24: | |
42cacb20 DE |
3177 | case elfcpp::R_POWERPC_ADDR16: |
3178 | case elfcpp::R_POWERPC_ADDR16_LO: | |
3179 | case elfcpp::R_POWERPC_ADDR16_HI: | |
3180 | case elfcpp::R_POWERPC_ADDR16_HA: | |
dd93cd0a AM |
3181 | case elfcpp::R_POWERPC_UADDR16: |
3182 | case elfcpp::R_PPC64_ADDR16_HIGHER: | |
3183 | case elfcpp::R_PPC64_ADDR16_HIGHERA: | |
3184 | case elfcpp::R_PPC64_ADDR16_HIGHEST: | |
3185 | case elfcpp::R_PPC64_ADDR16_HIGHESTA: | |
3186 | case elfcpp::R_PPC64_ADDR16_DS: | |
3187 | case elfcpp::R_PPC64_ADDR16_LO_DS: | |
3188 | case elfcpp::R_POWERPC_ADDR14: | |
3189 | case elfcpp::R_POWERPC_ADDR14_BRTAKEN: | |
3190 | case elfcpp::R_POWERPC_ADDR14_BRNTAKEN: | |
42cacb20 | 3191 | { |
c9269dff AM |
3192 | // Make a PLT entry if necessary. |
3193 | if (gsym->needs_plt_entry()) | |
3194 | { | |
c9824451 | 3195 | target->make_plt_entry(layout, gsym, reloc, 0); |
2e702c99 RM |
3196 | // Since this is not a PC-relative relocation, we may be |
3197 | // taking the address of a function. In that case we need to | |
3198 | // set the entry in the dynamic symbol table to the address of | |
e5d5f5ed | 3199 | // the PLT call stub. |
cf43a2fe | 3200 | if (size == 32 |
e5d5f5ed AM |
3201 | && gsym->is_from_dynobj() |
3202 | && !parameters->options().output_is_position_independent()) | |
2e702c99 | 3203 | gsym->set_needs_dynsym_value(); |
c9269dff AM |
3204 | } |
3205 | // Make a dynamic relocation if necessary. | |
c9824451 AM |
3206 | if (needs_dynamic_reloc<size>(gsym, Scan::get_reference_flags(r_type)) |
3207 | || (size == 64 && gsym->type() == elfcpp::STT_GNU_IFUNC)) | |
c9269dff AM |
3208 | { |
3209 | if (gsym->may_need_copy_reloc()) | |
3210 | { | |
3211 | target->copy_reloc(symtab, layout, object, | |
3212 | data_shndx, output_section, gsym, reloc); | |
3213 | } | |
dd93cd0a AM |
3214 | else if (((size == 32 && r_type == elfcpp::R_POWERPC_ADDR32) |
3215 | || (size == 64 && r_type == elfcpp::R_PPC64_ADDR64)) | |
3216 | && (gsym->can_use_relative_reloc(false) | |
e5d5f5ed AM |
3217 | || (size == 64 |
3218 | && data_shndx == ppc_object->opd_shndx()))) | |
2e702c99 RM |
3219 | { |
3220 | Reloc_section* rela_dyn = target->rela_dyn_section(layout); | |
e5d5f5ed AM |
3221 | unsigned int dynrel = elfcpp::R_POWERPC_RELATIVE; |
3222 | if (gsym->type() == elfcpp::STT_GNU_IFUNC) | |
3223 | { | |
3224 | rela_dyn = target->iplt_section()->rel_plt(); | |
3225 | dynrel = elfcpp::R_POWERPC_IRELATIVE; | |
3226 | } | |
3227 | rela_dyn->add_symbolless_global_addend( | |
3228 | gsym, dynrel, output_section, object, data_shndx, | |
3229 | reloc.get_r_offset(), reloc.get_r_addend()); | |
2e702c99 RM |
3230 | } |
3231 | else | |
3232 | { | |
3233 | Reloc_section* rela_dyn = target->rela_dyn_section(layout); | |
42cacb20 | 3234 | check_non_pic(object, r_type); |
dd93cd0a AM |
3235 | rela_dyn->add_global(gsym, r_type, output_section, |
3236 | object, data_shndx, | |
3237 | reloc.get_r_offset(), | |
3238 | reloc.get_r_addend()); | |
2e702c99 RM |
3239 | } |
3240 | } | |
42cacb20 DE |
3241 | } |
3242 | break; | |
3243 | ||
cf43a2fe | 3244 | case elfcpp::R_PPC_PLTREL24: |
42cacb20 | 3245 | case elfcpp::R_POWERPC_REL24: |
3ea0a085 AM |
3246 | if (gsym->needs_plt_entry() |
3247 | || (!gsym->final_value_is_known() | |
3248 | && (gsym->is_undefined() | |
3249 | || gsym->is_from_dynobj() | |
3250 | || gsym->is_preemptible()))) | |
c9824451 | 3251 | target->make_plt_entry(layout, gsym, reloc, object); |
3ea0a085 | 3252 | // Fall thru |
42cacb20 | 3253 | |
3ea0a085 | 3254 | case elfcpp::R_PPC64_REL64: |
dd93cd0a | 3255 | case elfcpp::R_POWERPC_REL32: |
3ea0a085 AM |
3256 | // Make a dynamic relocation if necessary. |
3257 | if (needs_dynamic_reloc<size>(gsym, Scan::get_reference_flags(r_type))) | |
3258 | { | |
3259 | if (gsym->may_need_copy_reloc()) | |
3260 | { | |
3261 | target->copy_reloc(symtab, layout, object, | |
3262 | data_shndx, output_section, gsym, | |
3263 | reloc); | |
3264 | } | |
3265 | else | |
3266 | { | |
3267 | Reloc_section* rela_dyn = target->rela_dyn_section(layout); | |
3268 | check_non_pic(object, r_type); | |
3269 | rela_dyn->add_global(gsym, r_type, output_section, object, | |
3270 | data_shndx, reloc.get_r_offset(), | |
3271 | reloc.get_r_addend()); | |
3272 | } | |
3273 | } | |
3274 | break; | |
3275 | ||
6ce78956 AM |
3276 | case elfcpp::R_POWERPC_REL16: |
3277 | case elfcpp::R_POWERPC_REL16_LO: | |
3278 | case elfcpp::R_POWERPC_REL16_HI: | |
3279 | case elfcpp::R_POWERPC_REL16_HA: | |
dd93cd0a AM |
3280 | case elfcpp::R_POWERPC_REL14: |
3281 | case elfcpp::R_POWERPC_REL14_BRTAKEN: | |
3282 | case elfcpp::R_POWERPC_REL14_BRNTAKEN: | |
3283 | case elfcpp::R_POWERPC_SECTOFF: | |
3284 | case elfcpp::R_POWERPC_TPREL16: | |
3285 | case elfcpp::R_POWERPC_DTPREL16: | |
3286 | case elfcpp::R_POWERPC_SECTOFF_LO: | |
3287 | case elfcpp::R_POWERPC_TPREL16_LO: | |
3288 | case elfcpp::R_POWERPC_DTPREL16_LO: | |
3289 | case elfcpp::R_POWERPC_SECTOFF_HI: | |
3290 | case elfcpp::R_POWERPC_TPREL16_HI: | |
3291 | case elfcpp::R_POWERPC_DTPREL16_HI: | |
3292 | case elfcpp::R_POWERPC_SECTOFF_HA: | |
3293 | case elfcpp::R_POWERPC_TPREL16_HA: | |
3294 | case elfcpp::R_POWERPC_DTPREL16_HA: | |
3295 | case elfcpp::R_PPC64_DTPREL16_HIGHER: | |
3296 | case elfcpp::R_PPC64_TPREL16_HIGHER: | |
3297 | case elfcpp::R_PPC64_DTPREL16_HIGHERA: | |
3298 | case elfcpp::R_PPC64_TPREL16_HIGHERA: | |
3299 | case elfcpp::R_PPC64_DTPREL16_HIGHEST: | |
3300 | case elfcpp::R_PPC64_TPREL16_HIGHEST: | |
3301 | case elfcpp::R_PPC64_DTPREL16_HIGHESTA: | |
3302 | case elfcpp::R_PPC64_TPREL16_HIGHESTA: | |
3303 | case elfcpp::R_PPC64_TPREL16_DS: | |
3304 | case elfcpp::R_PPC64_TPREL16_LO_DS: | |
3305 | case elfcpp::R_PPC64_DTPREL16_DS: | |
3306 | case elfcpp::R_PPC64_DTPREL16_LO_DS: | |
3307 | case elfcpp::R_PPC64_SECTOFF_DS: | |
3308 | case elfcpp::R_PPC64_SECTOFF_LO_DS: | |
3309 | case elfcpp::R_PPC64_TLSGD: | |
3310 | case elfcpp::R_PPC64_TLSLD: | |
cf43a2fe AM |
3311 | break; |
3312 | ||
42cacb20 DE |
3313 | case elfcpp::R_POWERPC_GOT16: |
3314 | case elfcpp::R_POWERPC_GOT16_LO: | |
3315 | case elfcpp::R_POWERPC_GOT16_HI: | |
3316 | case elfcpp::R_POWERPC_GOT16_HA: | |
dd93cd0a AM |
3317 | case elfcpp::R_PPC64_GOT16_DS: |
3318 | case elfcpp::R_PPC64_GOT16_LO_DS: | |
42cacb20 | 3319 | { |
c9269dff AM |
3320 | // The symbol requires a GOT entry. |
3321 | Output_data_got_powerpc<size, big_endian>* got; | |
42cacb20 DE |
3322 | |
3323 | got = target->got_section(symtab, layout); | |
2e702c99 | 3324 | if (gsym->final_value_is_known()) |
2e702c99 | 3325 | { |
e5d5f5ed AM |
3326 | if (size == 32 && gsym->type() == elfcpp::STT_GNU_IFUNC) |
3327 | got->add_global_plt(gsym, GOT_TYPE_STANDARD); | |
3328 | else | |
3329 | got->add_global(gsym, GOT_TYPE_STANDARD); | |
3330 | } | |
3331 | else if (!gsym->has_got_offset(GOT_TYPE_STANDARD)) | |
3332 | { | |
3333 | // If we are generating a shared object or a pie, this | |
3334 | // symbol's GOT entry will be set by a dynamic relocation. | |
3335 | unsigned int off = got->add_constant(0); | |
3336 | gsym->set_got_offset(GOT_TYPE_STANDARD, off); | |
3337 | ||
2e702c99 | 3338 | Reloc_section* rela_dyn = target->rela_dyn_section(layout); |
e5d5f5ed AM |
3339 | if (gsym->can_use_relative_reloc(false) |
3340 | && !(size == 32 | |
3341 | && gsym->visibility() == elfcpp::STV_PROTECTED | |
3342 | && parameters->options().shared())) | |
2e702c99 | 3343 | { |
e5d5f5ed AM |
3344 | unsigned int dynrel = elfcpp::R_POWERPC_RELATIVE; |
3345 | if (gsym->type() == elfcpp::STT_GNU_IFUNC) | |
3346 | { | |
3347 | rela_dyn = target->iplt_section()->rel_plt(); | |
3348 | dynrel = elfcpp::R_POWERPC_IRELATIVE; | |
3349 | } | |
3350 | rela_dyn->add_global_relative(gsym, dynrel, got, off, 0, false); | |
3351 | } | |
3352 | else | |
3353 | { | |
3354 | unsigned int dynrel = elfcpp::R_POWERPC_GLOB_DAT; | |
3355 | rela_dyn->add_global(gsym, dynrel, got, off, 0); | |
42cacb20 | 3356 | } |
2e702c99 | 3357 | } |
42cacb20 DE |
3358 | } |
3359 | break; | |
3360 | ||
cf43a2fe AM |
3361 | case elfcpp::R_PPC64_TOC16: |
3362 | case elfcpp::R_PPC64_TOC16_LO: | |
3363 | case elfcpp::R_PPC64_TOC16_HI: | |
3364 | case elfcpp::R_PPC64_TOC16_HA: | |
3365 | case elfcpp::R_PPC64_TOC16_DS: | |
3366 | case elfcpp::R_PPC64_TOC16_LO_DS: | |
42cacb20 DE |
3367 | // We need a GOT section. |
3368 | target->got_section(symtab, layout); | |
3369 | break; | |
3370 | ||
dd93cd0a AM |
3371 | case elfcpp::R_POWERPC_GOT_TLSGD16: |
3372 | case elfcpp::R_POWERPC_GOT_TLSGD16_LO: | |
3373 | case elfcpp::R_POWERPC_GOT_TLSGD16_HI: | |
3374 | case elfcpp::R_POWERPC_GOT_TLSGD16_HA: | |
3375 | { | |
3376 | const bool final = gsym->final_value_is_known(); | |
3377 | const tls::Tls_optimization tls_type = target->optimize_tls_gd(final); | |
3378 | if (tls_type == tls::TLSOPT_NONE) | |
3379 | { | |
3380 | Output_data_got_powerpc<size, big_endian>* got | |
3381 | = target->got_section(symtab, layout); | |
3382 | got->add_global_pair_with_rel(gsym, GOT_TYPE_TLSGD, | |
3383 | target->rela_dyn_section(layout), | |
3384 | elfcpp::R_POWERPC_DTPMOD, | |
3385 | elfcpp::R_POWERPC_DTPREL); | |
3386 | } | |
3387 | else if (tls_type == tls::TLSOPT_TO_IE) | |
3388 | { | |
3389 | Output_data_got_powerpc<size, big_endian>* got | |
3390 | = target->got_section(symtab, layout); | |
3391 | got->add_global_with_rel(gsym, GOT_TYPE_TPREL, | |
3392 | target->rela_dyn_section(layout), | |
3393 | elfcpp::R_POWERPC_TPREL); | |
3394 | } | |
3395 | else if (tls_type == tls::TLSOPT_TO_LE) | |
3396 | { | |
3397 | // no GOT relocs needed for Local Exec. | |
3398 | } | |
3399 | else | |
3400 | gold_unreachable(); | |
3401 | } | |
42cacb20 DE |
3402 | break; |
3403 | ||
dd93cd0a AM |
3404 | case elfcpp::R_POWERPC_GOT_TLSLD16: |
3405 | case elfcpp::R_POWERPC_GOT_TLSLD16_LO: | |
3406 | case elfcpp::R_POWERPC_GOT_TLSLD16_HI: | |
3407 | case elfcpp::R_POWERPC_GOT_TLSLD16_HA: | |
3408 | { | |
3409 | const tls::Tls_optimization tls_type = target->optimize_tls_ld(); | |
3410 | if (tls_type == tls::TLSOPT_NONE) | |
3411 | target->tlsld_got_offset(symtab, layout, object); | |
3412 | else if (tls_type == tls::TLSOPT_TO_LE) | |
3413 | { | |
3414 | // no GOT relocs needed for Local Exec. | |
7404fe1b AM |
3415 | if (parameters->options().emit_relocs()) |
3416 | { | |
3417 | Output_section* os = layout->tls_segment()->first_section(); | |
3418 | gold_assert(os != NULL); | |
3419 | os->set_needs_symtab_index(); | |
3420 | } | |
dd93cd0a AM |
3421 | } |
3422 | else | |
3423 | gold_unreachable(); | |
3424 | } | |
3425 | break; | |
3426 | ||
3427 | case elfcpp::R_POWERPC_GOT_DTPREL16: | |
3428 | case elfcpp::R_POWERPC_GOT_DTPREL16_LO: | |
3429 | case elfcpp::R_POWERPC_GOT_DTPREL16_HI: | |
3430 | case elfcpp::R_POWERPC_GOT_DTPREL16_HA: | |
3431 | { | |
3432 | Output_data_got_powerpc<size, big_endian>* got | |
3433 | = target->got_section(symtab, layout); | |
bd73a62d AM |
3434 | if (!gsym->final_value_is_known() |
3435 | && (gsym->is_from_dynobj() | |
3436 | || gsym->is_undefined() | |
3437 | || gsym->is_preemptible())) | |
3438 | got->add_global_with_rel(gsym, GOT_TYPE_DTPREL, | |
3439 | target->rela_dyn_section(layout), | |
3440 | elfcpp::R_POWERPC_DTPREL); | |
3441 | else | |
3442 | got->add_global_tls(gsym, GOT_TYPE_DTPREL); | |
dd93cd0a AM |
3443 | } |
3444 | break; | |
3445 | ||
3446 | case elfcpp::R_POWERPC_GOT_TPREL16: | |
3447 | case elfcpp::R_POWERPC_GOT_TPREL16_LO: | |
3448 | case elfcpp::R_POWERPC_GOT_TPREL16_HI: | |
3449 | case elfcpp::R_POWERPC_GOT_TPREL16_HA: | |
3450 | { | |
3451 | const bool final = gsym->final_value_is_known(); | |
3452 | const tls::Tls_optimization tls_type = target->optimize_tls_ie(final); | |
3453 | if (tls_type == tls::TLSOPT_NONE) | |
3454 | { | |
3455 | Output_data_got_powerpc<size, big_endian>* got | |
3456 | = target->got_section(symtab, layout); | |
bd73a62d AM |
3457 | if (!gsym->final_value_is_known() |
3458 | && (gsym->is_from_dynobj() | |
3459 | || gsym->is_undefined() | |
3460 | || gsym->is_preemptible())) | |
3461 | got->add_global_with_rel(gsym, GOT_TYPE_TPREL, | |
3462 | target->rela_dyn_section(layout), | |
3463 | elfcpp::R_POWERPC_TPREL); | |
3464 | else | |
3465 | got->add_global_tls(gsym, GOT_TYPE_TPREL); | |
dd93cd0a AM |
3466 | } |
3467 | else if (tls_type == tls::TLSOPT_TO_LE) | |
3468 | { | |
3469 | // no GOT relocs needed for Local Exec. | |
3470 | } | |
3471 | else | |
3472 | gold_unreachable(); | |
3473 | } | |
42cacb20 DE |
3474 | break; |
3475 | ||
3476 | default: | |
3477 | unsupported_reloc_global(object, r_type, gsym); | |
3478 | break; | |
3479 | } | |
3480 | } | |
3481 | ||
6d03d481 ST |
3482 | // Process relocations for gc. |
3483 | ||
3484 | template<int size, bool big_endian> | |
3485 | void | |
3486 | Target_powerpc<size, big_endian>::gc_process_relocs( | |
d83ce4e3 AM |
3487 | Symbol_table* symtab, |
3488 | Layout* layout, | |
3489 | Sized_relobj_file<size, big_endian>* object, | |
3490 | unsigned int data_shndx, | |
3491 | unsigned int, | |
3492 | const unsigned char* prelocs, | |
3493 | size_t reloc_count, | |
3494 | Output_section* output_section, | |
3495 | bool needs_special_offset_handling, | |
3496 | size_t local_symbol_count, | |
3497 | const unsigned char* plocal_symbols) | |
6d03d481 ST |
3498 | { |
3499 | typedef Target_powerpc<size, big_endian> Powerpc; | |
2ea97941 | 3500 | typedef typename Target_powerpc<size, big_endian>::Scan Scan; |
e81fea4d AM |
3501 | Powerpc_relobj<size, big_endian>* ppc_object |
3502 | = static_cast<Powerpc_relobj<size, big_endian>*>(object); | |
3503 | if (size == 64) | |
3504 | ppc_object->set_opd_valid(); | |
3505 | if (size == 64 && data_shndx == ppc_object->opd_shndx()) | |
3506 | { | |
3507 | typename Powerpc_relobj<size, big_endian>::Access_from::iterator p; | |
3508 | for (p = ppc_object->access_from_map()->begin(); | |
3509 | p != ppc_object->access_from_map()->end(); | |
3510 | ++p) | |
3511 | { | |
3512 | Address dst_off = p->first; | |
3513 | unsigned int dst_indx = ppc_object->get_opd_ent(dst_off); | |
3514 | typename Powerpc_relobj<size, big_endian>::Section_refs::iterator s; | |
3515 | for (s = p->second.begin(); s != p->second.end(); ++s) | |
3516 | { | |
3517 | Object* src_obj = s->first; | |
3518 | unsigned int src_indx = s->second; | |
3519 | symtab->gc()->add_reference(src_obj, src_indx, | |
3520 | ppc_object, dst_indx); | |
3521 | } | |
3522 | p->second.clear(); | |
3523 | } | |
3524 | ppc_object->access_from_map()->clear(); | |
c6de8ed4 | 3525 | ppc_object->process_gc_mark(symtab); |
e81fea4d AM |
3526 | // Don't look at .opd relocs as .opd will reference everything. |
3527 | return; | |
3528 | } | |
6d03d481 | 3529 | |
41cbeecc | 3530 | gold::gc_process_relocs<size, big_endian, Powerpc, elfcpp::SHT_RELA, Scan, |
3ff2ccb0 | 3531 | typename Target_powerpc::Relocatable_size_for_reloc>( |
6d03d481 ST |
3532 | symtab, |
3533 | layout, | |
3534 | this, | |
3535 | object, | |
3536 | data_shndx, | |
3537 | prelocs, | |
3538 | reloc_count, | |
3539 | output_section, | |
3540 | needs_special_offset_handling, | |
3541 | local_symbol_count, | |
3542 | plocal_symbols); | |
3543 | } | |
3544 | ||
e81fea4d AM |
3545 | // Handle target specific gc actions when adding a gc reference from |
3546 | // SRC_OBJ, SRC_SHNDX to a location specified by DST_OBJ, DST_SHNDX | |
3547 | // and DST_OFF. For powerpc64, this adds a referenc to the code | |
3548 | // section of a function descriptor. | |
3549 | ||
3550 | template<int size, bool big_endian> | |
3551 | void | |
3552 | Target_powerpc<size, big_endian>::do_gc_add_reference( | |
3553 | Symbol_table* symtab, | |
3554 | Object* src_obj, | |
3555 | unsigned int src_shndx, | |
3556 | Object* dst_obj, | |
3557 | unsigned int dst_shndx, | |
3558 | Address dst_off) const | |
3559 | { | |
3560 | Powerpc_relobj<size, big_endian>* ppc_object | |
3561 | = static_cast<Powerpc_relobj<size, big_endian>*>(dst_obj); | |
3562 | if (size == 64 && dst_shndx == ppc_object->opd_shndx()) | |
3563 | { | |
3564 | if (ppc_object->opd_valid()) | |
3565 | { | |
3566 | dst_shndx = ppc_object->get_opd_ent(dst_off); | |
3567 | symtab->gc()->add_reference(src_obj, src_shndx, dst_obj, dst_shndx); | |
3568 | } | |
3569 | else | |
3570 | { | |
3571 | // If we haven't run scan_opd_relocs, we must delay | |
3572 | // processing this function descriptor reference. | |
3573 | ppc_object->add_reference(src_obj, src_shndx, dst_off); | |
3574 | } | |
3575 | } | |
3576 | } | |
3577 | ||
3578 | // Add any special sections for this symbol to the gc work list. | |
3579 | // For powerpc64, this adds the code section of a function | |
3580 | // descriptor. | |
3581 | ||
3582 | template<int size, bool big_endian> | |
3583 | void | |
3584 | Target_powerpc<size, big_endian>::do_gc_mark_symbol( | |
3585 | Symbol_table* symtab, | |
3586 | Symbol* sym) const | |
3587 | { | |
3588 | if (size == 64) | |
3589 | { | |
3590 | Powerpc_relobj<size, big_endian>* ppc_object | |
3591 | = static_cast<Powerpc_relobj<size, big_endian>*>(sym->object()); | |
3592 | bool is_ordinary; | |
3593 | unsigned int shndx = sym->shndx(&is_ordinary); | |
3594 | if (is_ordinary && shndx == ppc_object->opd_shndx()) | |
3595 | { | |
3596 | Sized_symbol<size>* gsym = symtab->get_sized_symbol<size>(sym); | |
3597 | Address dst_off = gsym->value(); | |
c6de8ed4 AM |
3598 | if (ppc_object->opd_valid()) |
3599 | { | |
3600 | unsigned int dst_indx = ppc_object->get_opd_ent(dst_off); | |
3601 | symtab->gc()->worklist().push(Section_id(ppc_object, dst_indx)); | |
3602 | } | |
3603 | else | |
3604 | ppc_object->add_gc_mark(dst_off); | |
e81fea4d AM |
3605 | } |
3606 | } | |
3607 | } | |
3608 | ||
42cacb20 DE |
3609 | // Scan relocations for a section. |
3610 | ||
3611 | template<int size, bool big_endian> | |
3612 | void | |
3613 | Target_powerpc<size, big_endian>::scan_relocs( | |
d83ce4e3 AM |
3614 | Symbol_table* symtab, |
3615 | Layout* layout, | |
3616 | Sized_relobj_file<size, big_endian>* object, | |
3617 | unsigned int data_shndx, | |
3618 | unsigned int sh_type, | |
3619 | const unsigned char* prelocs, | |
3620 | size_t reloc_count, | |
3621 | Output_section* output_section, | |
3622 | bool needs_special_offset_handling, | |
3623 | size_t local_symbol_count, | |
3624 | const unsigned char* plocal_symbols) | |
42cacb20 DE |
3625 | { |
3626 | typedef Target_powerpc<size, big_endian> Powerpc; | |
2ea97941 | 3627 | typedef typename Target_powerpc<size, big_endian>::Scan Scan; |
42cacb20 DE |
3628 | |
3629 | if (sh_type == elfcpp::SHT_REL) | |
3630 | { | |
3631 | gold_error(_("%s: unsupported REL reloc section"), | |
3632 | object->name().c_str()); | |
3633 | return; | |
3634 | } | |
3635 | ||
cf43a2fe AM |
3636 | if (size == 32) |
3637 | { | |
3638 | static Output_data_space* sdata; | |
3639 | ||
3640 | // Define _SDA_BASE_ at the start of the .sdata section. | |
3641 | if (sdata == NULL) | |
3642 | { | |
3643 | // layout->find_output_section(".sdata") == NULL | |
3644 | sdata = new Output_data_space(4, "** sdata"); | |
3645 | Output_section* os | |
3646 | = layout->add_output_section_data(".sdata", 0, | |
3647 | elfcpp::SHF_ALLOC | |
3648 | | elfcpp::SHF_WRITE, | |
3649 | sdata, ORDER_SMALL_DATA, false); | |
3650 | symtab->define_in_output_data("_SDA_BASE_", NULL, | |
3651 | Symbol_table::PREDEFINED, | |
3652 | os, 32768, 0, elfcpp::STT_OBJECT, | |
3653 | elfcpp::STB_LOCAL, elfcpp::STV_HIDDEN, | |
3654 | 0, false, false); | |
3655 | } | |
3656 | } | |
42cacb20 | 3657 | |
2ea97941 | 3658 | gold::scan_relocs<size, big_endian, Powerpc, elfcpp::SHT_RELA, Scan>( |
42cacb20 DE |
3659 | symtab, |
3660 | layout, | |
3661 | this, | |
3662 | object, | |
3663 | data_shndx, | |
3664 | prelocs, | |
3665 | reloc_count, | |
3666 | output_section, | |
3667 | needs_special_offset_handling, | |
3668 | local_symbol_count, | |
3669 | plocal_symbols); | |
3670 | } | |
3671 | ||
ec4dbad3 AM |
3672 | // Functor class for processing the global symbol table. |
3673 | // Removes symbols defined on discarded opd entries. | |
3674 | ||
3675 | template<bool big_endian> | |
3676 | class Global_symbol_visitor_opd | |
3677 | { | |
3678 | public: | |
3679 | Global_symbol_visitor_opd() | |
3680 | { } | |
3681 | ||
3682 | void | |
3683 | operator()(Sized_symbol<64>* sym) | |
3684 | { | |
3685 | if (sym->has_symtab_index() | |
3686 | || sym->source() != Symbol::FROM_OBJECT | |
3687 | || !sym->in_real_elf()) | |
3688 | return; | |
3689 | ||
3690 | Powerpc_relobj<64, big_endian>* symobj | |
3691 | = static_cast<Powerpc_relobj<64, big_endian>*>(sym->object()); | |
3692 | if (symobj->is_dynamic() | |
3693 | || symobj->opd_shndx() == 0) | |
3694 | return; | |
3695 | ||
3696 | bool is_ordinary; | |
3697 | unsigned int shndx = sym->shndx(&is_ordinary); | |
3698 | if (shndx == symobj->opd_shndx() | |
3699 | && symobj->get_opd_discard(sym->value())) | |
3700 | sym->set_symtab_index(-1U); | |
3701 | } | |
3702 | }; | |
3703 | ||
42cacb20 DE |
3704 | // Finalize the sections. |
3705 | ||
3706 | template<int size, bool big_endian> | |
3707 | void | |
d5b40221 DK |
3708 | Target_powerpc<size, big_endian>::do_finalize_sections( |
3709 | Layout* layout, | |
f59f41f3 | 3710 | const Input_objects*, |
ec4dbad3 | 3711 | Symbol_table* symtab) |
42cacb20 | 3712 | { |
c9824451 AM |
3713 | if (parameters->doing_static_link()) |
3714 | { | |
3715 | // At least some versions of glibc elf-init.o have a strong | |
3716 | // reference to __rela_iplt marker syms. A weak ref would be | |
3717 | // better.. | |
3718 | if (this->iplt_ != NULL) | |
3719 | { | |
3720 | Reloc_section* rel = this->iplt_->rel_plt(); | |
3721 | symtab->define_in_output_data("__rela_iplt_start", NULL, | |
3722 | Symbol_table::PREDEFINED, rel, 0, 0, | |
3723 | elfcpp::STT_NOTYPE, elfcpp::STB_GLOBAL, | |
3724 | elfcpp::STV_HIDDEN, 0, false, true); | |
3725 | symtab->define_in_output_data("__rela_iplt_end", NULL, | |
3726 | Symbol_table::PREDEFINED, rel, 0, 0, | |
3727 | elfcpp::STT_NOTYPE, elfcpp::STB_GLOBAL, | |
3728 | elfcpp::STV_HIDDEN, 0, true, true); | |
3729 | } | |
3730 | else | |
3731 | { | |
3732 | symtab->define_as_constant("__rela_iplt_start", NULL, | |
3733 | Symbol_table::PREDEFINED, 0, 0, | |
3734 | elfcpp::STT_NOTYPE, elfcpp::STB_GLOBAL, | |
3735 | elfcpp::STV_HIDDEN, 0, true, false); | |
3736 | symtab->define_as_constant("__rela_iplt_end", NULL, | |
3737 | Symbol_table::PREDEFINED, 0, 0, | |
3738 | elfcpp::STT_NOTYPE, elfcpp::STB_GLOBAL, | |
3739 | elfcpp::STV_HIDDEN, 0, true, false); | |
3740 | } | |
3741 | } | |
3742 | ||
ec4dbad3 AM |
3743 | if (size == 64) |
3744 | { | |
3745 | typedef Global_symbol_visitor_opd<big_endian> Symbol_visitor; | |
3746 | symtab->for_all_symbols<64, Symbol_visitor>(Symbol_visitor()); | |
3747 | } | |
3748 | ||
42cacb20 | 3749 | // Fill in some more dynamic tags. |
c9269dff | 3750 | Output_data_dynamic* odyn = layout->dynamic_data(); |
c9824451 | 3751 | if (odyn != NULL) |
cf43a2fe | 3752 | { |
c9824451 AM |
3753 | const Reloc_section* rel_plt = (this->plt_ == NULL |
3754 | ? NULL | |
3755 | : this->plt_->rel_plt()); | |
3756 | layout->add_target_dynamic_tags(false, this->plt_, rel_plt, | |
3757 | this->rela_dyn_, true, size == 32); | |
3758 | ||
3759 | if (size == 32) | |
dd93cd0a | 3760 | { |
c9824451 AM |
3761 | if (this->got_ != NULL) |
3762 | { | |
3763 | this->got_->finalize_data_size(); | |
3764 | odyn->add_section_plus_offset(elfcpp::DT_PPC_GOT, | |
3765 | this->got_, this->got_->g_o_t()); | |
3766 | } | |
dd93cd0a | 3767 | } |
c9824451 | 3768 | else |
dd93cd0a | 3769 | { |
c9824451 AM |
3770 | if (this->glink_ != NULL) |
3771 | { | |
3772 | this->glink_->finalize_data_size(); | |
3773 | odyn->add_section_plus_offset(elfcpp::DT_PPC64_GLINK, | |
3774 | this->glink_, | |
3775 | (this->glink_->pltresolve() | |
3776 | + this->glink_->pltresolve_size | |
3777 | - 32)); | |
3778 | } | |
dd93cd0a | 3779 | } |
c9269dff | 3780 | } |
cf43a2fe | 3781 | |
42cacb20 DE |
3782 | // Emit any relocs we saved in an attempt to avoid generating COPY |
3783 | // relocs. | |
3784 | if (this->copy_relocs_.any_saved_relocs()) | |
3785 | this->copy_relocs_.emit(this->rela_dyn_section(layout)); | |
3786 | } | |
3787 | ||
3ea0a085 AM |
3788 | // Return the value to use for a branch relocation. |
3789 | ||
3790 | template<int size, bool big_endian> | |
3791 | typename elfcpp::Elf_types<size>::Elf_Addr | |
3792 | Target_powerpc<size, big_endian>::symval_for_branch( | |
3793 | Address value, | |
3794 | const Sized_symbol<size>* gsym, | |
3795 | Powerpc_relobj<size, big_endian>* object, | |
3796 | unsigned int *dest_shndx) | |
3797 | { | |
3798 | *dest_shndx = 0; | |
3799 | if (size == 32) | |
3800 | return value; | |
3801 | ||
3802 | // If the symbol is defined in an opd section, ie. is a function | |
3803 | // descriptor, use the function descriptor code entry address | |
3804 | Powerpc_relobj<size, big_endian>* symobj = object; | |
3805 | if (gsym != NULL) | |
3806 | symobj = static_cast<Powerpc_relobj<size, big_endian>*>(gsym->object()); | |
3807 | unsigned int shndx = symobj->opd_shndx(); | |
3808 | if (shndx == 0) | |
3809 | return value; | |
3810 | Address opd_addr = symobj->get_output_section_offset(shndx); | |
3811 | gold_assert(opd_addr != invalid_address); | |
3812 | opd_addr += symobj->output_section(shndx)->address(); | |
3813 | if (value >= opd_addr && value < opd_addr + symobj->section_size(shndx)) | |
3814 | { | |
3815 | Address sec_off; | |
e81fea4d | 3816 | *dest_shndx = symobj->get_opd_ent(value - opd_addr, &sec_off); |
3ea0a085 AM |
3817 | Address sec_addr = symobj->get_output_section_offset(*dest_shndx); |
3818 | gold_assert(sec_addr != invalid_address); | |
3819 | sec_addr += symobj->output_section(*dest_shndx)->address(); | |
3820 | value = sec_addr + sec_off; | |
3821 | } | |
3822 | return value; | |
3823 | } | |
3824 | ||
42cacb20 DE |
3825 | // Perform a relocation. |
3826 | ||
3827 | template<int size, bool big_endian> | |
3828 | inline bool | |
3829 | Target_powerpc<size, big_endian>::Relocate::relocate( | |
d83ce4e3 AM |
3830 | const Relocate_info<size, big_endian>* relinfo, |
3831 | Target_powerpc* target, | |
3832 | Output_section* os, | |
3833 | size_t relnum, | |
3834 | const elfcpp::Rela<size, big_endian>& rela, | |
3835 | unsigned int r_type, | |
3836 | const Sized_symbol<size>* gsym, | |
3837 | const Symbol_value<size>* psymval, | |
3838 | unsigned char* view, | |
c9269dff AM |
3839 | Address address, |
3840 | section_size_type view_size) | |
42cacb20 | 3841 | { |
dd93cd0a AM |
3842 | |
3843 | bool is_tls_call = ((r_type == elfcpp::R_POWERPC_REL24 | |
3844 | || r_type == elfcpp::R_PPC_PLTREL24) | |
3845 | && gsym != NULL | |
3846 | && strcmp(gsym->name(), "__tls_get_addr") == 0); | |
3847 | enum skip_tls last_tls = this->call_tls_get_addr_; | |
3848 | this->call_tls_get_addr_ = CALL_NOT_EXPECTED; | |
3849 | if (is_tls_call) | |
3850 | { | |
3851 | if (last_tls == CALL_NOT_EXPECTED) | |
3852 | gold_error_at_location(relinfo, relnum, rela.get_r_offset(), | |
3853 | _("__tls_get_addr call lacks marker reloc")); | |
3854 | else if (last_tls == CALL_SKIP) | |
3855 | return false; | |
3856 | } | |
3857 | else if (last_tls != CALL_NOT_EXPECTED) | |
3858 | gold_error_at_location(relinfo, relnum, rela.get_r_offset(), | |
3859 | _("missing expected __tls_get_addr call")); | |
3860 | ||
42cacb20 | 3861 | typedef Powerpc_relocate_functions<size, big_endian> Reloc; |
dd93cd0a | 3862 | typedef typename elfcpp::Swap<32, big_endian>::Valtype Insn; |
3ea0a085 AM |
3863 | Powerpc_relobj<size, big_endian>* const object |
3864 | = static_cast<Powerpc_relobj<size, big_endian>*>(relinfo->object); | |
dd93cd0a AM |
3865 | Address value = 0; |
3866 | bool has_plt_value = false; | |
e5d5f5ed | 3867 | unsigned int r_sym = elfcpp::elf_r_sym<size>(rela.get_r_info()); |
dd93cd0a | 3868 | if (gsym != NULL |
e5d5f5ed AM |
3869 | ? use_plt_offset<size>(gsym, Scan::get_reference_flags(r_type)) |
3870 | : object->local_has_plt_offset(r_sym)) | |
dd93cd0a AM |
3871 | { |
3872 | const Output_data_glink<size, big_endian>* glink | |
3873 | = target->glink_section(); | |
c9824451 AM |
3874 | unsigned int glink_index; |
3875 | if (gsym != NULL) | |
3876 | glink_index = glink->find_entry(object, gsym, rela); | |
3877 | else | |
3878 | glink_index = glink->find_entry(object, r_sym, rela); | |
dd93cd0a AM |
3879 | value = glink->address() + glink_index * glink->glink_entry_size(); |
3880 | has_plt_value = true; | |
3881 | } | |
cf43a2fe AM |
3882 | |
3883 | if (r_type == elfcpp::R_POWERPC_GOT16 | |
3884 | || r_type == elfcpp::R_POWERPC_GOT16_LO | |
3885 | || r_type == elfcpp::R_POWERPC_GOT16_HI | |
3886 | || r_type == elfcpp::R_POWERPC_GOT16_HA | |
3887 | || r_type == elfcpp::R_PPC64_GOT16_DS | |
3888 | || r_type == elfcpp::R_PPC64_GOT16_LO_DS) | |
42cacb20 | 3889 | { |
cf43a2fe AM |
3890 | if (gsym != NULL) |
3891 | { | |
3892 | gold_assert(gsym->has_got_offset(GOT_TYPE_STANDARD)); | |
3893 | value = gsym->got_offset(GOT_TYPE_STANDARD); | |
3894 | } | |
3895 | else | |
3896 | { | |
3897 | unsigned int r_sym = elfcpp::elf_r_sym<size>(rela.get_r_info()); | |
3898 | gold_assert(object->local_has_got_offset(r_sym, GOT_TYPE_STANDARD)); | |
3899 | value = object->local_got_offset(r_sym, GOT_TYPE_STANDARD); | |
3900 | } | |
dd93cd0a | 3901 | value -= target->got_section()->got_base_offset(object); |
cf43a2fe AM |
3902 | } |
3903 | else if (r_type == elfcpp::R_PPC64_TOC) | |
3904 | { | |
c9269dff | 3905 | value = (target->got_section()->output_section()->address() |
dd93cd0a | 3906 | + object->toc_base_offset()); |
cf43a2fe AM |
3907 | } |
3908 | else if (gsym != NULL | |
3909 | && (r_type == elfcpp::R_POWERPC_REL24 | |
3910 | || r_type == elfcpp::R_PPC_PLTREL24) | |
dd93cd0a | 3911 | && has_plt_value) |
cf43a2fe | 3912 | { |
c9269dff AM |
3913 | if (size == 64) |
3914 | { | |
3915 | typedef typename elfcpp::Swap<32, big_endian>::Valtype Valtype; | |
3916 | Valtype* wv = reinterpret_cast<Valtype*>(view); | |
3917 | bool can_plt_call = false; | |
3918 | if (rela.get_r_offset() + 8 <= view_size) | |
3919 | { | |
3ea0a085 | 3920 | Valtype insn = elfcpp::Swap<32, big_endian>::readval(wv); |
c9269dff | 3921 | Valtype insn2 = elfcpp::Swap<32, big_endian>::readval(wv + 1); |
3ea0a085 AM |
3922 | if ((insn & 1) != 0 |
3923 | && (insn2 == nop | |
3924 | || insn2 == cror_15_15_15 || insn2 == cror_31_31_31)) | |
c9269dff AM |
3925 | { |
3926 | elfcpp::Swap<32, big_endian>::writeval(wv + 1, ld_2_1 + 40); | |
3927 | can_plt_call = true; | |
3928 | } | |
3929 | } | |
3930 | if (!can_plt_call) | |
3ea0a085 AM |
3931 | { |
3932 | // If we don't have a branch and link followed by a nop, | |
3933 | // we can't go via the plt because there is no place to | |
3934 | // put a toc restoring instruction. | |
3935 | // Unless we know we won't be returning. | |
3936 | if (strcmp(gsym->name(), "__libc_start_main") == 0) | |
3937 | can_plt_call = true; | |
3938 | } | |
3939 | if (!can_plt_call) | |
3940 | { | |
3941 | // This is not an error in one special case: A self | |
3942 | // call. It isn't possible to cheaply verify we have | |
3943 | // such a call so just check for a call to the same | |
3944 | // section. | |
3945 | bool ok = false; | |
c9824451 | 3946 | Address code = value; |
3ea0a085 AM |
3947 | if (gsym->source() == Symbol::FROM_OBJECT |
3948 | && gsym->object() == object) | |
3949 | { | |
3950 | Address addend = rela.get_r_addend(); | |
3951 | unsigned int dest_shndx; | |
c9824451 AM |
3952 | Address opdent = psymval->value(object, addend); |
3953 | code = target->symval_for_branch(opdent, gsym, object, | |
3954 | &dest_shndx); | |
3ea0a085 AM |
3955 | bool is_ordinary; |
3956 | if (dest_shndx == 0) | |
3957 | dest_shndx = gsym->shndx(&is_ordinary); | |
3958 | ok = dest_shndx == relinfo->data_shndx; | |
3959 | } | |
3960 | if (!ok) | |
c9824451 AM |
3961 | { |
3962 | gold_error_at_location(relinfo, relnum, rela.get_r_offset(), | |
3963 | _("call lacks nop, can't restore toc; " | |
3964 | "recompile with -fPIC")); | |
3965 | value = code; | |
3966 | } | |
3ea0a085 | 3967 | } |
c9269dff | 3968 | } |
cf43a2fe | 3969 | } |
dd93cd0a AM |
3970 | else if (r_type == elfcpp::R_POWERPC_GOT_TLSGD16 |
3971 | || r_type == elfcpp::R_POWERPC_GOT_TLSGD16_LO | |
3972 | || r_type == elfcpp::R_POWERPC_GOT_TLSGD16_HI | |
3973 | || r_type == elfcpp::R_POWERPC_GOT_TLSGD16_HA) | |
3974 | { | |
3975 | // First instruction of a global dynamic sequence, arg setup insn. | |
3976 | const bool final = gsym == NULL || gsym->final_value_is_known(); | |
3977 | const tls::Tls_optimization tls_type = target->optimize_tls_gd(final); | |
3978 | enum Got_type got_type = GOT_TYPE_STANDARD; | |
3979 | if (tls_type == tls::TLSOPT_NONE) | |
3980 | got_type = GOT_TYPE_TLSGD; | |
3981 | else if (tls_type == tls::TLSOPT_TO_IE) | |
3982 | got_type = GOT_TYPE_TPREL; | |
3983 | if (got_type != GOT_TYPE_STANDARD) | |
3984 | { | |
3985 | if (gsym != NULL) | |
3986 | { | |
3987 | gold_assert(gsym->has_got_offset(got_type)); | |
3988 | value = gsym->got_offset(got_type); | |
3989 | } | |
3990 | else | |
3991 | { | |
3992 | unsigned int r_sym = elfcpp::elf_r_sym<size>(rela.get_r_info()); | |
3993 | gold_assert(object->local_has_got_offset(r_sym, got_type)); | |
3994 | value = object->local_got_offset(r_sym, got_type); | |
3995 | } | |
3996 | value -= target->got_section()->got_base_offset(object); | |
3997 | } | |
3998 | if (tls_type == tls::TLSOPT_TO_IE) | |
3999 | { | |
4000 | if (r_type == elfcpp::R_POWERPC_GOT_TLSGD16 | |
4001 | || r_type == elfcpp::R_POWERPC_GOT_TLSGD16_LO) | |
4002 | { | |
4003 | Insn* iview = reinterpret_cast<Insn*>(view - 2 * big_endian); | |
4004 | Insn insn = elfcpp::Swap<32, big_endian>::readval(iview); | |
4005 | insn &= (1 << 26) - (1 << 16); // extract rt,ra from addi | |
4006 | if (size == 32) | |
4007 | insn |= 32 << 26; // lwz | |
4008 | else | |
4009 | insn |= 58 << 26; // ld | |
4010 | elfcpp::Swap<32, big_endian>::writeval(iview, insn); | |
4011 | } | |
4012 | r_type += (elfcpp::R_POWERPC_GOT_TPREL16 | |
4013 | - elfcpp::R_POWERPC_GOT_TLSGD16); | |
4014 | } | |
4015 | else if (tls_type == tls::TLSOPT_TO_LE) | |
4016 | { | |
4017 | if (r_type == elfcpp::R_POWERPC_GOT_TLSGD16 | |
4018 | || r_type == elfcpp::R_POWERPC_GOT_TLSGD16_LO) | |
4019 | { | |
4020 | Insn* iview = reinterpret_cast<Insn*>(view - 2 * big_endian); | |
4021 | Insn insn = addis_3_13; | |
4022 | if (size == 32) | |
4023 | insn = addis_3_2; | |
4024 | elfcpp::Swap<32, big_endian>::writeval(iview, insn); | |
4025 | r_type = elfcpp::R_POWERPC_TPREL16_HA; | |
4026 | value = psymval->value(object, rela.get_r_addend()); | |
4027 | } | |
4028 | else | |
4029 | { | |
4030 | Insn* iview = reinterpret_cast<Insn*>(view - 2 * big_endian); | |
4031 | Insn insn = nop; | |
4032 | elfcpp::Swap<32, big_endian>::writeval(iview, insn); | |
4033 | r_type = elfcpp::R_POWERPC_NONE; | |
4034 | } | |
4035 | } | |
4036 | } | |
4037 | else if (r_type == elfcpp::R_POWERPC_GOT_TLSLD16 | |
4038 | || r_type == elfcpp::R_POWERPC_GOT_TLSLD16_LO | |
4039 | || r_type == elfcpp::R_POWERPC_GOT_TLSLD16_HI | |
4040 | || r_type == elfcpp::R_POWERPC_GOT_TLSLD16_HA) | |
4041 | { | |
4042 | // First instruction of a local dynamic sequence, arg setup insn. | |
4043 | const tls::Tls_optimization tls_type = target->optimize_tls_ld(); | |
4044 | if (tls_type == tls::TLSOPT_NONE) | |
4045 | { | |
4046 | value = target->tlsld_got_offset(); | |
4047 | value -= target->got_section()->got_base_offset(object); | |
4048 | } | |
4049 | else | |
4050 | { | |
4051 | gold_assert(tls_type == tls::TLSOPT_TO_LE); | |
4052 | if (r_type == elfcpp::R_POWERPC_GOT_TLSLD16 | |
4053 | || r_type == elfcpp::R_POWERPC_GOT_TLSLD16_LO) | |
4054 | { | |
4055 | Insn* iview = reinterpret_cast<Insn*>(view - 2 * big_endian); | |
4056 | Insn insn = addis_3_13; | |
4057 | if (size == 32) | |
4058 | insn = addis_3_2; | |
4059 | elfcpp::Swap<32, big_endian>::writeval(iview, insn); | |
4060 | r_type = elfcpp::R_POWERPC_TPREL16_HA; | |
7404fe1b | 4061 | value = dtp_offset; |
dd93cd0a AM |
4062 | } |
4063 | else | |
4064 | { | |
4065 | Insn* iview = reinterpret_cast<Insn*>(view - 2 * big_endian); | |
4066 | Insn insn = nop; | |
4067 | elfcpp::Swap<32, big_endian>::writeval(iview, insn); | |
4068 | r_type = elfcpp::R_POWERPC_NONE; | |
4069 | } | |
4070 | } | |
4071 | } | |
4072 | else if (r_type == elfcpp::R_POWERPC_GOT_DTPREL16 | |
4073 | || r_type == elfcpp::R_POWERPC_GOT_DTPREL16_LO | |
4074 | || r_type == elfcpp::R_POWERPC_GOT_DTPREL16_HI | |
4075 | || r_type == elfcpp::R_POWERPC_GOT_DTPREL16_HA) | |
4076 | { | |
4077 | // Accesses relative to a local dynamic sequence address, | |
4078 | // no optimisation here. | |
4079 | if (gsym != NULL) | |
4080 | { | |
4081 | gold_assert(gsym->has_got_offset(GOT_TYPE_DTPREL)); | |
4082 | value = gsym->got_offset(GOT_TYPE_DTPREL); | |
4083 | } | |
4084 | else | |
4085 | { | |
4086 | unsigned int r_sym = elfcpp::elf_r_sym<size>(rela.get_r_info()); | |
4087 | gold_assert(object->local_has_got_offset(r_sym, GOT_TYPE_DTPREL)); | |
4088 | value = object->local_got_offset(r_sym, GOT_TYPE_DTPREL); | |
4089 | } | |
4090 | value -= target->got_section()->got_base_offset(object); | |
4091 | } | |
4092 | else if (r_type == elfcpp::R_POWERPC_GOT_TPREL16 | |
4093 | || r_type == elfcpp::R_POWERPC_GOT_TPREL16_LO | |
4094 | || r_type == elfcpp::R_POWERPC_GOT_TPREL16_HI | |
4095 | || r_type == elfcpp::R_POWERPC_GOT_TPREL16_HA) | |
4096 | { | |
4097 | // First instruction of initial exec sequence. | |
4098 | const bool final = gsym == NULL || gsym->final_value_is_known(); | |
4099 | const tls::Tls_optimization tls_type = target->optimize_tls_ie(final); | |
4100 | if (tls_type == tls::TLSOPT_NONE) | |
4101 | { | |
4102 | if (gsym != NULL) | |
4103 | { | |
4104 | gold_assert(gsym->has_got_offset(GOT_TYPE_TPREL)); | |
4105 | value = gsym->got_offset(GOT_TYPE_TPREL); | |
4106 | } | |
4107 | else | |
4108 | { | |
4109 | unsigned int r_sym = elfcpp::elf_r_sym<size>(rela.get_r_info()); | |
4110 | gold_assert(object->local_has_got_offset(r_sym, GOT_TYPE_TPREL)); | |
4111 | value = object->local_got_offset(r_sym, GOT_TYPE_TPREL); | |
4112 | } | |
4113 | value -= target->got_section()->got_base_offset(object); | |
4114 | } | |
4115 | else | |
4116 | { | |
4117 | gold_assert(tls_type == tls::TLSOPT_TO_LE); | |
4118 | if (r_type == elfcpp::R_POWERPC_GOT_TPREL16 | |
4119 | || r_type == elfcpp::R_POWERPC_GOT_TPREL16_LO) | |
4120 | { | |
4121 | Insn* iview = reinterpret_cast<Insn*>(view - 2 * big_endian); | |
4122 | Insn insn = elfcpp::Swap<32, big_endian>::readval(iview); | |
4123 | insn &= (1 << 26) - (1 << 21); // extract rt from ld | |
4124 | if (size == 32) | |
4125 | insn |= addis_0_2; | |
4126 | else | |
4127 | insn |= addis_0_13; | |
4128 | elfcpp::Swap<32, big_endian>::writeval(iview, insn); | |
4129 | r_type = elfcpp::R_POWERPC_TPREL16_HA; | |
4130 | value = psymval->value(object, rela.get_r_addend()); | |
4131 | } | |
4132 | else | |
4133 | { | |
4134 | Insn* iview = reinterpret_cast<Insn*>(view - 2 * big_endian); | |
4135 | Insn insn = nop; | |
4136 | elfcpp::Swap<32, big_endian>::writeval(iview, insn); | |
4137 | r_type = elfcpp::R_POWERPC_NONE; | |
4138 | } | |
4139 | } | |
4140 | } | |
4141 | else if ((size == 64 && r_type == elfcpp::R_PPC64_TLSGD) | |
4142 | || (size == 32 && r_type == elfcpp::R_PPC_TLSGD)) | |
4143 | { | |
4144 | // Second instruction of a global dynamic sequence, | |
4145 | // the __tls_get_addr call | |
4146 | this->call_tls_get_addr_ = CALL_EXPECTED; | |
4147 | const bool final = gsym == NULL || gsym->final_value_is_known(); | |
4148 | const tls::Tls_optimization tls_type = target->optimize_tls_gd(final); | |
4149 | if (tls_type != tls::TLSOPT_NONE) | |
4150 | { | |
4151 | if (tls_type == tls::TLSOPT_TO_IE) | |
4152 | { | |
4153 | Insn* iview = reinterpret_cast<Insn*>(view); | |
4154 | Insn insn = add_3_3_13; | |
4155 | if (size == 32) | |
4156 | insn = add_3_3_2; | |
4157 | elfcpp::Swap<32, big_endian>::writeval(iview, insn); | |
4158 | r_type = elfcpp::R_POWERPC_NONE; | |
4159 | } | |
4160 | else | |
4161 | { | |
4162 | Insn* iview = reinterpret_cast<Insn*>(view); | |
4163 | Insn insn = addi_3_3; | |
4164 | elfcpp::Swap<32, big_endian>::writeval(iview, insn); | |
4165 | r_type = elfcpp::R_POWERPC_TPREL16_LO; | |
4166 | view += 2 * big_endian; | |
4167 | value = psymval->value(object, rela.get_r_addend()); | |
4168 | } | |
4169 | this->call_tls_get_addr_ = CALL_SKIP; | |
4170 | } | |
4171 | } | |
4172 | else if ((size == 64 && r_type == elfcpp::R_PPC64_TLSLD) | |
4173 | || (size == 32 && r_type == elfcpp::R_PPC_TLSLD)) | |
4174 | { | |
4175 | // Second instruction of a local dynamic sequence, | |
4176 | // the __tls_get_addr call | |
4177 | this->call_tls_get_addr_ = CALL_EXPECTED; | |
4178 | const tls::Tls_optimization tls_type = target->optimize_tls_ld(); | |
4179 | if (tls_type == tls::TLSOPT_TO_LE) | |
4180 | { | |
4181 | Insn* iview = reinterpret_cast<Insn*>(view); | |
4182 | Insn insn = addi_3_3; | |
4183 | elfcpp::Swap<32, big_endian>::writeval(iview, insn); | |
4184 | this->call_tls_get_addr_ = CALL_SKIP; | |
4185 | r_type = elfcpp::R_POWERPC_TPREL16_LO; | |
4186 | view += 2 * big_endian; | |
7404fe1b | 4187 | value = dtp_offset; |
dd93cd0a AM |
4188 | } |
4189 | } | |
4190 | else if (r_type == elfcpp::R_POWERPC_TLS) | |
4191 | { | |
4192 | // Second instruction of an initial exec sequence | |
4193 | const bool final = gsym == NULL || gsym->final_value_is_known(); | |
4194 | const tls::Tls_optimization tls_type = target->optimize_tls_ie(final); | |
4195 | if (tls_type == tls::TLSOPT_TO_LE) | |
4196 | { | |
4197 | Insn* iview = reinterpret_cast<Insn*>(view); | |
4198 | Insn insn = elfcpp::Swap<32, big_endian>::readval(iview); | |
4199 | unsigned int reg = size == 32 ? 2 : 13; | |
4200 | insn = at_tls_transform(insn, reg); | |
4201 | gold_assert(insn != 0); | |
4202 | elfcpp::Swap<32, big_endian>::writeval(iview, insn); | |
4203 | r_type = elfcpp::R_POWERPC_TPREL16_LO; | |
4204 | view += 2 * big_endian; | |
4205 | value = psymval->value(object, rela.get_r_addend()); | |
4206 | } | |
4207 | } | |
c9824451 | 4208 | else if (!has_plt_value) |
cf43a2fe | 4209 | { |
dd93cd0a | 4210 | Address addend = 0; |
3ea0a085 | 4211 | unsigned int dest_shndx; |
cf43a2fe AM |
4212 | if (r_type != elfcpp::R_PPC_PLTREL24) |
4213 | addend = rela.get_r_addend(); | |
c9824451 | 4214 | value = psymval->value(object, addend); |
dd93cd0a | 4215 | if (size == 64 && is_branch_reloc(r_type)) |
3ea0a085 | 4216 | value = target->symval_for_branch(value, gsym, object, &dest_shndx); |
42cacb20 DE |
4217 | } |
4218 | ||
42cacb20 DE |
4219 | switch (r_type) |
4220 | { | |
dd93cd0a AM |
4221 | case elfcpp::R_PPC64_REL64: |
4222 | case elfcpp::R_POWERPC_REL32: | |
4223 | case elfcpp::R_POWERPC_REL24: | |
4224 | case elfcpp::R_PPC_PLTREL24: | |
4225 | case elfcpp::R_PPC_LOCAL24PC: | |
4226 | case elfcpp::R_POWERPC_REL16: | |
4227 | case elfcpp::R_POWERPC_REL16_LO: | |
4228 | case elfcpp::R_POWERPC_REL16_HI: | |
4229 | case elfcpp::R_POWERPC_REL16_HA: | |
4230 | case elfcpp::R_POWERPC_REL14: | |
4231 | case elfcpp::R_POWERPC_REL14_BRTAKEN: | |
4232 | case elfcpp::R_POWERPC_REL14_BRNTAKEN: | |
4233 | value -= address; | |
4234 | break; | |
4235 | ||
42cacb20 DE |
4236 | case elfcpp::R_PPC64_TOC16: |
4237 | case elfcpp::R_PPC64_TOC16_LO: | |
4238 | case elfcpp::R_PPC64_TOC16_HI: | |
4239 | case elfcpp::R_PPC64_TOC16_HA: | |
4240 | case elfcpp::R_PPC64_TOC16_DS: | |
4241 | case elfcpp::R_PPC64_TOC16_LO_DS: | |
cf43a2fe | 4242 | // Subtract the TOC base address. |
c9269dff | 4243 | value -= (target->got_section()->output_section()->address() |
dd93cd0a | 4244 | + object->toc_base_offset()); |
42cacb20 DE |
4245 | break; |
4246 | ||
cf43a2fe AM |
4247 | case elfcpp::R_POWERPC_SECTOFF: |
4248 | case elfcpp::R_POWERPC_SECTOFF_LO: | |
4249 | case elfcpp::R_POWERPC_SECTOFF_HI: | |
4250 | case elfcpp::R_POWERPC_SECTOFF_HA: | |
4251 | case elfcpp::R_PPC64_SECTOFF_DS: | |
4252 | case elfcpp::R_PPC64_SECTOFF_LO_DS: | |
4253 | if (os != NULL) | |
4254 | value -= os->address(); | |
42cacb20 DE |
4255 | break; |
4256 | ||
dd93cd0a AM |
4257 | case elfcpp::R_PPC64_TPREL16_DS: |
4258 | case elfcpp::R_PPC64_TPREL16_LO_DS: | |
4259 | if (size != 64) | |
4260 | // R_PPC_TLSGD and R_PPC_TLSLD | |
4261 | break; | |
4262 | case elfcpp::R_POWERPC_TPREL16: | |
4263 | case elfcpp::R_POWERPC_TPREL16_LO: | |
4264 | case elfcpp::R_POWERPC_TPREL16_HI: | |
4265 | case elfcpp::R_POWERPC_TPREL16_HA: | |
4266 | case elfcpp::R_POWERPC_TPREL: | |
4267 | case elfcpp::R_PPC64_TPREL16_HIGHER: | |
4268 | case elfcpp::R_PPC64_TPREL16_HIGHERA: | |
4269 | case elfcpp::R_PPC64_TPREL16_HIGHEST: | |
4270 | case elfcpp::R_PPC64_TPREL16_HIGHESTA: | |
4271 | // tls symbol values are relative to tls_segment()->vaddr() | |
4272 | value -= tp_offset; | |
4273 | break; | |
4274 | ||
4275 | case elfcpp::R_PPC64_DTPREL16_DS: | |
4276 | case elfcpp::R_PPC64_DTPREL16_LO_DS: | |
4277 | case elfcpp::R_PPC64_DTPREL16_HIGHER: | |
4278 | case elfcpp::R_PPC64_DTPREL16_HIGHERA: | |
4279 | case elfcpp::R_PPC64_DTPREL16_HIGHEST: | |
4280 | case elfcpp::R_PPC64_DTPREL16_HIGHESTA: | |
4281 | if (size != 64) | |
4282 | // R_PPC_EMB_NADDR32, R_PPC_EMB_NADDR16, R_PPC_EMB_NADDR16_LO | |
4283 | // R_PPC_EMB_NADDR16_HI, R_PPC_EMB_NADDR16_HA, R_PPC_EMB_SDAI16 | |
4284 | break; | |
4285 | case elfcpp::R_POWERPC_DTPREL16: | |
4286 | case elfcpp::R_POWERPC_DTPREL16_LO: | |
4287 | case elfcpp::R_POWERPC_DTPREL16_HI: | |
4288 | case elfcpp::R_POWERPC_DTPREL16_HA: | |
4289 | case elfcpp::R_POWERPC_DTPREL: | |
4290 | // tls symbol values are relative to tls_segment()->vaddr() | |
4291 | value -= dtp_offset; | |
4292 | break; | |
4293 | ||
42cacb20 DE |
4294 | default: |
4295 | break; | |
4296 | } | |
4297 | ||
dd93cd0a | 4298 | Insn branch_bit = 0; |
42cacb20 DE |
4299 | switch (r_type) |
4300 | { | |
dd93cd0a AM |
4301 | case elfcpp::R_POWERPC_ADDR14_BRTAKEN: |
4302 | case elfcpp::R_POWERPC_REL14_BRTAKEN: | |
4303 | branch_bit = 1 << 21; | |
4304 | case elfcpp::R_POWERPC_ADDR14_BRNTAKEN: | |
4305 | case elfcpp::R_POWERPC_REL14_BRNTAKEN: | |
4306 | { | |
4307 | Insn* iview = reinterpret_cast<Insn*>(view); | |
4308 | Insn insn = elfcpp::Swap<32, big_endian>::readval(iview); | |
4309 | insn &= ~(1 << 21); | |
4310 | insn |= branch_bit; | |
4311 | if (this->is_isa_v2) | |
4312 | { | |
4313 | // Set 'a' bit. This is 0b00010 in BO field for branch | |
4314 | // on CR(BI) insns (BO == 001at or 011at), and 0b01000 | |
4315 | // for branch on CTR insns (BO == 1a00t or 1a01t). | |
4316 | if ((insn & (0x14 << 21)) == (0x04 << 21)) | |
4317 | insn |= 0x02 << 21; | |
4318 | else if ((insn & (0x14 << 21)) == (0x10 << 21)) | |
4319 | insn |= 0x08 << 21; | |
4320 | else | |
4321 | break; | |
4322 | } | |
4323 | else | |
4324 | { | |
4325 | // Invert 'y' bit if not the default. | |
4326 | if (static_cast<Signed_address>(value) < 0) | |
4327 | insn ^= 1 << 21; | |
4328 | } | |
4329 | elfcpp::Swap<32, big_endian>::writeval(iview, insn); | |
4330 | } | |
4331 | break; | |
4332 | ||
4333 | default: | |
4334 | break; | |
4335 | } | |
4336 | ||
f4baf0d4 | 4337 | typename Reloc::Overflow_check overflow = Reloc::CHECK_NONE; |
dd93cd0a AM |
4338 | switch (r_type) |
4339 | { | |
4340 | case elfcpp::R_POWERPC_ADDR32: | |
4341 | case elfcpp::R_POWERPC_UADDR32: | |
4342 | if (size == 64) | |
f4baf0d4 | 4343 | overflow = Reloc::CHECK_BITFIELD; |
42cacb20 DE |
4344 | break; |
4345 | ||
4346 | case elfcpp::R_POWERPC_REL32: | |
dd93cd0a | 4347 | if (size == 64) |
f4baf0d4 | 4348 | overflow = Reloc::CHECK_SIGNED; |
dd93cd0a AM |
4349 | break; |
4350 | ||
4351 | case elfcpp::R_POWERPC_ADDR24: | |
4352 | case elfcpp::R_POWERPC_ADDR16: | |
4353 | case elfcpp::R_POWERPC_UADDR16: | |
4354 | case elfcpp::R_PPC64_ADDR16_DS: | |
4355 | case elfcpp::R_POWERPC_ADDR14: | |
4356 | case elfcpp::R_POWERPC_ADDR14_BRTAKEN: | |
4357 | case elfcpp::R_POWERPC_ADDR14_BRNTAKEN: | |
f4baf0d4 | 4358 | overflow = Reloc::CHECK_BITFIELD; |
42cacb20 DE |
4359 | break; |
4360 | ||
4361 | case elfcpp::R_POWERPC_REL24: | |
42cacb20 | 4362 | case elfcpp::R_PPC_PLTREL24: |
cf43a2fe | 4363 | case elfcpp::R_PPC_LOCAL24PC: |
dd93cd0a AM |
4364 | case elfcpp::R_POWERPC_REL16: |
4365 | case elfcpp::R_PPC64_TOC16: | |
4366 | case elfcpp::R_POWERPC_GOT16: | |
4367 | case elfcpp::R_POWERPC_SECTOFF: | |
4368 | case elfcpp::R_POWERPC_TPREL16: | |
4369 | case elfcpp::R_POWERPC_DTPREL16: | |
4370 | case elfcpp::R_PPC64_TPREL16_DS: | |
4371 | case elfcpp::R_PPC64_DTPREL16_DS: | |
4372 | case elfcpp::R_PPC64_TOC16_DS: | |
4373 | case elfcpp::R_PPC64_GOT16_DS: | |
4374 | case elfcpp::R_PPC64_SECTOFF_DS: | |
4375 | case elfcpp::R_POWERPC_REL14: | |
4376 | case elfcpp::R_POWERPC_REL14_BRTAKEN: | |
4377 | case elfcpp::R_POWERPC_REL14_BRNTAKEN: | |
4378 | case elfcpp::R_POWERPC_GOT_TLSGD16: | |
4379 | case elfcpp::R_POWERPC_GOT_TLSLD16: | |
4380 | case elfcpp::R_POWERPC_GOT_TPREL16: | |
4381 | case elfcpp::R_POWERPC_GOT_DTPREL16: | |
f4baf0d4 | 4382 | overflow = Reloc::CHECK_SIGNED; |
42cacb20 | 4383 | break; |
dd93cd0a | 4384 | } |
42cacb20 | 4385 | |
3ea0a085 | 4386 | typename Powerpc_relocate_functions<size, big_endian>::Status status |
f4baf0d4 | 4387 | = Powerpc_relocate_functions<size, big_endian>::STATUS_OK; |
dd93cd0a AM |
4388 | switch (r_type) |
4389 | { | |
4390 | case elfcpp::R_POWERPC_NONE: | |
4391 | case elfcpp::R_POWERPC_TLS: | |
4392 | case elfcpp::R_POWERPC_GNU_VTINHERIT: | |
4393 | case elfcpp::R_POWERPC_GNU_VTENTRY: | |
4394 | case elfcpp::R_PPC_EMB_MRKREF: | |
42cacb20 DE |
4395 | break; |
4396 | ||
4397 | case elfcpp::R_PPC64_ADDR64: | |
dd93cd0a | 4398 | case elfcpp::R_PPC64_REL64: |
cf43a2fe | 4399 | case elfcpp::R_PPC64_TOC: |
dd93cd0a AM |
4400 | Reloc::addr64(view, value); |
4401 | break; | |
4402 | ||
4403 | case elfcpp::R_POWERPC_TPREL: | |
4404 | case elfcpp::R_POWERPC_DTPREL: | |
4405 | if (size == 64) | |
4406 | Reloc::addr64(view, value); | |
4407 | else | |
3ea0a085 | 4408 | status = Reloc::addr32(view, value, overflow); |
dd93cd0a AM |
4409 | break; |
4410 | ||
4411 | case elfcpp::R_PPC64_UADDR64: | |
4412 | Reloc::addr64_u(view, value); | |
42cacb20 DE |
4413 | break; |
4414 | ||
4415 | case elfcpp::R_POWERPC_ADDR32: | |
dd93cd0a | 4416 | case elfcpp::R_POWERPC_REL32: |
3ea0a085 | 4417 | status = Reloc::addr32(view, value, overflow); |
dd93cd0a AM |
4418 | break; |
4419 | ||
4420 | case elfcpp::R_POWERPC_UADDR32: | |
3ea0a085 | 4421 | status = Reloc::addr32_u(view, value, overflow); |
dd93cd0a AM |
4422 | break; |
4423 | ||
4424 | case elfcpp::R_POWERPC_ADDR24: | |
4425 | case elfcpp::R_POWERPC_REL24: | |
4426 | case elfcpp::R_PPC_PLTREL24: | |
4427 | case elfcpp::R_PPC_LOCAL24PC: | |
3ea0a085 | 4428 | status = Reloc::addr24(view, value, overflow); |
42cacb20 DE |
4429 | break; |
4430 | ||
dd93cd0a AM |
4431 | case elfcpp::R_POWERPC_GOT_DTPREL16: |
4432 | case elfcpp::R_POWERPC_GOT_DTPREL16_LO: | |
4433 | if (size == 64) | |
4434 | { | |
3ea0a085 | 4435 | status = Reloc::addr16_ds(view, value, overflow); |
dd93cd0a AM |
4436 | break; |
4437 | } | |
cf43a2fe | 4438 | case elfcpp::R_POWERPC_ADDR16: |
dd93cd0a | 4439 | case elfcpp::R_POWERPC_REL16: |
cf43a2fe | 4440 | case elfcpp::R_PPC64_TOC16: |
42cacb20 | 4441 | case elfcpp::R_POWERPC_GOT16: |
cf43a2fe | 4442 | case elfcpp::R_POWERPC_SECTOFF: |
dd93cd0a AM |
4443 | case elfcpp::R_POWERPC_TPREL16: |
4444 | case elfcpp::R_POWERPC_DTPREL16: | |
4445 | case elfcpp::R_POWERPC_GOT_TLSGD16: | |
4446 | case elfcpp::R_POWERPC_GOT_TLSLD16: | |
4447 | case elfcpp::R_POWERPC_GOT_TPREL16: | |
cf43a2fe | 4448 | case elfcpp::R_POWERPC_ADDR16_LO: |
dd93cd0a | 4449 | case elfcpp::R_POWERPC_REL16_LO: |
cf43a2fe | 4450 | case elfcpp::R_PPC64_TOC16_LO: |
42cacb20 | 4451 | case elfcpp::R_POWERPC_GOT16_LO: |
cf43a2fe | 4452 | case elfcpp::R_POWERPC_SECTOFF_LO: |
dd93cd0a AM |
4453 | case elfcpp::R_POWERPC_TPREL16_LO: |
4454 | case elfcpp::R_POWERPC_DTPREL16_LO: | |
4455 | case elfcpp::R_POWERPC_GOT_TLSGD16_LO: | |
4456 | case elfcpp::R_POWERPC_GOT_TLSLD16_LO: | |
4457 | case elfcpp::R_POWERPC_GOT_TPREL16_LO: | |
3ea0a085 | 4458 | status = Reloc::addr16(view, value, overflow); |
dd93cd0a AM |
4459 | break; |
4460 | ||
4461 | case elfcpp::R_POWERPC_UADDR16: | |
3ea0a085 | 4462 | status = Reloc::addr16_u(view, value, overflow); |
42cacb20 DE |
4463 | break; |
4464 | ||
cf43a2fe | 4465 | case elfcpp::R_POWERPC_ADDR16_HI: |
dd93cd0a | 4466 | case elfcpp::R_POWERPC_REL16_HI: |
cf43a2fe | 4467 | case elfcpp::R_PPC64_TOC16_HI: |
42cacb20 | 4468 | case elfcpp::R_POWERPC_GOT16_HI: |
cf43a2fe | 4469 | case elfcpp::R_POWERPC_SECTOFF_HI: |
dd93cd0a AM |
4470 | case elfcpp::R_POWERPC_TPREL16_HI: |
4471 | case elfcpp::R_POWERPC_DTPREL16_HI: | |
4472 | case elfcpp::R_POWERPC_GOT_TLSGD16_HI: | |
4473 | case elfcpp::R_POWERPC_GOT_TLSLD16_HI: | |
4474 | case elfcpp::R_POWERPC_GOT_TPREL16_HI: | |
4475 | case elfcpp::R_POWERPC_GOT_DTPREL16_HI: | |
4476 | Reloc::addr16_hi(view, value); | |
42cacb20 DE |
4477 | break; |
4478 | ||
cf43a2fe | 4479 | case elfcpp::R_POWERPC_ADDR16_HA: |
dd93cd0a | 4480 | case elfcpp::R_POWERPC_REL16_HA: |
cf43a2fe | 4481 | case elfcpp::R_PPC64_TOC16_HA: |
42cacb20 | 4482 | case elfcpp::R_POWERPC_GOT16_HA: |
cf43a2fe | 4483 | case elfcpp::R_POWERPC_SECTOFF_HA: |
dd93cd0a AM |
4484 | case elfcpp::R_POWERPC_TPREL16_HA: |
4485 | case elfcpp::R_POWERPC_DTPREL16_HA: | |
4486 | case elfcpp::R_POWERPC_GOT_TLSGD16_HA: | |
4487 | case elfcpp::R_POWERPC_GOT_TLSLD16_HA: | |
4488 | case elfcpp::R_POWERPC_GOT_TPREL16_HA: | |
4489 | case elfcpp::R_POWERPC_GOT_DTPREL16_HA: | |
4490 | Reloc::addr16_ha(view, value); | |
42cacb20 DE |
4491 | break; |
4492 | ||
dd93cd0a AM |
4493 | case elfcpp::R_PPC64_DTPREL16_HIGHER: |
4494 | if (size == 32) | |
4495 | // R_PPC_EMB_NADDR16_LO | |
4496 | goto unsupp; | |
4497 | case elfcpp::R_PPC64_ADDR16_HIGHER: | |
4498 | case elfcpp::R_PPC64_TPREL16_HIGHER: | |
4499 | Reloc::addr16_hi2(view, value); | |
42cacb20 DE |
4500 | break; |
4501 | ||
dd93cd0a AM |
4502 | case elfcpp::R_PPC64_DTPREL16_HIGHERA: |
4503 | if (size == 32) | |
4504 | // R_PPC_EMB_NADDR16_HI | |
4505 | goto unsupp; | |
4506 | case elfcpp::R_PPC64_ADDR16_HIGHERA: | |
4507 | case elfcpp::R_PPC64_TPREL16_HIGHERA: | |
4508 | Reloc::addr16_ha2(view, value); | |
42cacb20 DE |
4509 | break; |
4510 | ||
dd93cd0a AM |
4511 | case elfcpp::R_PPC64_DTPREL16_HIGHEST: |
4512 | if (size == 32) | |
4513 | // R_PPC_EMB_NADDR16_HA | |
4514 | goto unsupp; | |
4515 | case elfcpp::R_PPC64_ADDR16_HIGHEST: | |
4516 | case elfcpp::R_PPC64_TPREL16_HIGHEST: | |
4517 | Reloc::addr16_hi3(view, value); | |
42cacb20 DE |
4518 | break; |
4519 | ||
dd93cd0a AM |
4520 | case elfcpp::R_PPC64_DTPREL16_HIGHESTA: |
4521 | if (size == 32) | |
4522 | // R_PPC_EMB_SDAI16 | |
4523 | goto unsupp; | |
4524 | case elfcpp::R_PPC64_ADDR16_HIGHESTA: | |
4525 | case elfcpp::R_PPC64_TPREL16_HIGHESTA: | |
4526 | Reloc::addr16_ha3(view, value); | |
4527 | break; | |
4528 | ||
4529 | case elfcpp::R_PPC64_DTPREL16_DS: | |
4530 | case elfcpp::R_PPC64_DTPREL16_LO_DS: | |
4531 | if (size == 32) | |
4532 | // R_PPC_EMB_NADDR32, R_PPC_EMB_NADDR16 | |
4533 | goto unsupp; | |
4534 | case elfcpp::R_PPC64_TPREL16_DS: | |
4535 | case elfcpp::R_PPC64_TPREL16_LO_DS: | |
4536 | if (size == 32) | |
4537 | // R_PPC_TLSGD, R_PPC_TLSLD | |
4538 | break; | |
cf43a2fe AM |
4539 | case elfcpp::R_PPC64_ADDR16_DS: |
4540 | case elfcpp::R_PPC64_ADDR16_LO_DS: | |
42cacb20 DE |
4541 | case elfcpp::R_PPC64_TOC16_DS: |
4542 | case elfcpp::R_PPC64_TOC16_LO_DS: | |
cf43a2fe AM |
4543 | case elfcpp::R_PPC64_GOT16_DS: |
4544 | case elfcpp::R_PPC64_GOT16_LO_DS: | |
4545 | case elfcpp::R_PPC64_SECTOFF_DS: | |
4546 | case elfcpp::R_PPC64_SECTOFF_LO_DS: | |
3ea0a085 | 4547 | status = Reloc::addr16_ds(view, value, overflow); |
dd93cd0a AM |
4548 | break; |
4549 | ||
4550 | case elfcpp::R_POWERPC_ADDR14: | |
4551 | case elfcpp::R_POWERPC_ADDR14_BRTAKEN: | |
4552 | case elfcpp::R_POWERPC_ADDR14_BRNTAKEN: | |
4553 | case elfcpp::R_POWERPC_REL14: | |
4554 | case elfcpp::R_POWERPC_REL14_BRTAKEN: | |
4555 | case elfcpp::R_POWERPC_REL14_BRNTAKEN: | |
3ea0a085 | 4556 | status = Reloc::addr14(view, value, overflow); |
42cacb20 DE |
4557 | break; |
4558 | ||
4559 | case elfcpp::R_POWERPC_COPY: | |
4560 | case elfcpp::R_POWERPC_GLOB_DAT: | |
4561 | case elfcpp::R_POWERPC_JMP_SLOT: | |
4562 | case elfcpp::R_POWERPC_RELATIVE: | |
42cacb20 | 4563 | case elfcpp::R_POWERPC_DTPMOD: |
dd93cd0a AM |
4564 | case elfcpp::R_PPC64_JMP_IREL: |
4565 | case elfcpp::R_POWERPC_IRELATIVE: | |
42cacb20 DE |
4566 | gold_error_at_location(relinfo, relnum, rela.get_r_offset(), |
4567 | _("unexpected reloc %u in object file"), | |
4568 | r_type); | |
4569 | break; | |
4570 | ||
dd93cd0a AM |
4571 | case elfcpp::R_PPC_EMB_SDA21: |
4572 | if (size == 32) | |
4573 | goto unsupp; | |
4574 | else | |
4575 | { | |
4576 | // R_PPC64_TOCSAVE. For the time being this can be ignored. | |
4577 | } | |
4578 | break; | |
4579 | ||
4580 | case elfcpp::R_PPC_EMB_SDA2I16: | |
4581 | case elfcpp::R_PPC_EMB_SDA2REL: | |
4582 | if (size == 32) | |
4583 | goto unsupp; | |
4584 | // R_PPC64_TLSGD, R_PPC64_TLSLD | |
6ce78956 AM |
4585 | break; |
4586 | ||
dd93cd0a AM |
4587 | case elfcpp::R_POWERPC_PLT32: |
4588 | case elfcpp::R_POWERPC_PLTREL32: | |
4589 | case elfcpp::R_POWERPC_PLT16_LO: | |
4590 | case elfcpp::R_POWERPC_PLT16_HI: | |
4591 | case elfcpp::R_POWERPC_PLT16_HA: | |
4592 | case elfcpp::R_PPC_SDAREL16: | |
4593 | case elfcpp::R_POWERPC_ADDR30: | |
4594 | case elfcpp::R_PPC64_PLT64: | |
4595 | case elfcpp::R_PPC64_PLTREL64: | |
4596 | case elfcpp::R_PPC64_PLTGOT16: | |
4597 | case elfcpp::R_PPC64_PLTGOT16_LO: | |
4598 | case elfcpp::R_PPC64_PLTGOT16_HI: | |
4599 | case elfcpp::R_PPC64_PLTGOT16_HA: | |
4600 | case elfcpp::R_PPC64_PLT16_LO_DS: | |
4601 | case elfcpp::R_PPC64_PLTGOT16_DS: | |
4602 | case elfcpp::R_PPC64_PLTGOT16_LO_DS: | |
4603 | case elfcpp::R_PPC_EMB_RELSEC16: | |
4604 | case elfcpp::R_PPC_EMB_RELST_LO: | |
4605 | case elfcpp::R_PPC_EMB_RELST_HI: | |
4606 | case elfcpp::R_PPC_EMB_RELST_HA: | |
4607 | case elfcpp::R_PPC_EMB_BIT_FLD: | |
4608 | case elfcpp::R_PPC_EMB_RELSDA: | |
4609 | case elfcpp::R_PPC_TOC16: | |
42cacb20 | 4610 | default: |
dd93cd0a | 4611 | unsupp: |
42cacb20 DE |
4612 | gold_error_at_location(relinfo, relnum, rela.get_r_offset(), |
4613 | _("unsupported reloc %u"), | |
4614 | r_type); | |
4615 | break; | |
4616 | } | |
f4baf0d4 | 4617 | if (status != Powerpc_relocate_functions<size, big_endian>::STATUS_OK) |
3ea0a085 AM |
4618 | gold_error_at_location(relinfo, relnum, rela.get_r_offset(), |
4619 | _("relocation overflow")); | |
42cacb20 DE |
4620 | |
4621 | return true; | |
4622 | } | |
4623 | ||
42cacb20 DE |
4624 | // Relocate section data. |
4625 | ||
4626 | template<int size, bool big_endian> | |
4627 | void | |
4628 | Target_powerpc<size, big_endian>::relocate_section( | |
d83ce4e3 AM |
4629 | const Relocate_info<size, big_endian>* relinfo, |
4630 | unsigned int sh_type, | |
4631 | const unsigned char* prelocs, | |
4632 | size_t reloc_count, | |
4633 | Output_section* output_section, | |
4634 | bool needs_special_offset_handling, | |
4635 | unsigned char* view, | |
c9269dff | 4636 | Address address, |
d83ce4e3 AM |
4637 | section_size_type view_size, |
4638 | const Reloc_symbol_changes* reloc_symbol_changes) | |
42cacb20 DE |
4639 | { |
4640 | typedef Target_powerpc<size, big_endian> Powerpc; | |
4641 | typedef typename Target_powerpc<size, big_endian>::Relocate Powerpc_relocate; | |
4642 | ||
4643 | gold_assert(sh_type == elfcpp::SHT_RELA); | |
4644 | ||
bfdfa4cd AM |
4645 | unsigned char *opd_rel = NULL; |
4646 | Powerpc_relobj<size, big_endian>* const object | |
4647 | = static_cast<Powerpc_relobj<size, big_endian>*>(relinfo->object); | |
4648 | if (size == 64 | |
4649 | && relinfo->data_shndx == object->opd_shndx()) | |
4650 | { | |
4651 | // Rewrite opd relocs, omitting those for discarded sections | |
4652 | // to silence gold::relocate_section errors. | |
4653 | const int reloc_size | |
4654 | = Reloc_types<elfcpp::SHT_RELA, size, big_endian>::reloc_size; | |
4655 | opd_rel = new unsigned char[reloc_count * reloc_size]; | |
4656 | const unsigned char* rrel = prelocs; | |
4657 | unsigned char* wrel = opd_rel; | |
4658 | ||
4659 | for (size_t i = 0; | |
4660 | i < reloc_count; | |
4661 | ++i, rrel += reloc_size, wrel += reloc_size) | |
4662 | { | |
4663 | typename Reloc_types<elfcpp::SHT_RELA, size, big_endian>::Reloc | |
4664 | reloc(rrel); | |
4665 | typename elfcpp::Elf_types<size>::Elf_WXword r_info | |
4666 | = reloc.get_r_info(); | |
4667 | unsigned int r_type = elfcpp::elf_r_type<size>(r_info); | |
4668 | Address r_off = reloc.get_r_offset(); | |
4669 | if (r_type == elfcpp::R_PPC64_TOC) | |
4670 | r_off -= 8; | |
4671 | bool is_discarded = object->get_opd_discard(r_off); | |
4672 | ||
4673 | // Reloc number is reported in some errors, so keep all relocs. | |
4674 | if (is_discarded) | |
4675 | memset(wrel, 0, reloc_size); | |
4676 | else | |
4677 | memcpy(wrel, rrel, reloc_size); | |
4678 | } | |
4679 | prelocs = opd_rel; | |
4680 | } | |
4681 | ||
42cacb20 | 4682 | gold::relocate_section<size, big_endian, Powerpc, elfcpp::SHT_RELA, |
d83ce4e3 | 4683 | Powerpc_relocate>( |
42cacb20 DE |
4684 | relinfo, |
4685 | this, | |
4686 | prelocs, | |
4687 | reloc_count, | |
4688 | output_section, | |
4689 | needs_special_offset_handling, | |
4690 | view, | |
4691 | address, | |
364c7fa5 ILT |
4692 | view_size, |
4693 | reloc_symbol_changes); | |
bfdfa4cd AM |
4694 | |
4695 | if (opd_rel != NULL) | |
4696 | delete[] opd_rel; | |
42cacb20 DE |
4697 | } |
4698 | ||
cf43a2fe | 4699 | class Powerpc_scan_relocatable_reloc |
42cacb20 | 4700 | { |
cf43a2fe AM |
4701 | public: |
4702 | // Return the strategy to use for a local symbol which is not a | |
4703 | // section symbol, given the relocation type. | |
4704 | inline Relocatable_relocs::Reloc_strategy | |
4705 | local_non_section_strategy(unsigned int r_type, Relobj*, unsigned int r_sym) | |
4706 | { | |
4707 | if (r_type == 0 && r_sym == 0) | |
4708 | return Relocatable_relocs::RELOC_DISCARD; | |
4709 | return Relocatable_relocs::RELOC_COPY; | |
4710 | } | |
4711 | ||
4712 | // Return the strategy to use for a local symbol which is a section | |
4713 | // symbol, given the relocation type. | |
4714 | inline Relocatable_relocs::Reloc_strategy | |
4715 | local_section_strategy(unsigned int, Relobj*) | |
4716 | { | |
4717 | return Relocatable_relocs::RELOC_ADJUST_FOR_SECTION_RELA; | |
4718 | } | |
4719 | ||
4720 | // Return the strategy to use for a global symbol, given the | |
4721 | // relocation type, the object, and the symbol index. | |
4722 | inline Relocatable_relocs::Reloc_strategy | |
4723 | global_strategy(unsigned int r_type, Relobj*, unsigned int) | |
4724 | { | |
4725 | if (r_type == elfcpp::R_PPC_PLTREL24) | |
4726 | return Relocatable_relocs::RELOC_SPECIAL; | |
4727 | return Relocatable_relocs::RELOC_COPY; | |
4728 | } | |
4729 | }; | |
42cacb20 DE |
4730 | |
4731 | // Scan the relocs during a relocatable link. | |
4732 | ||
4733 | template<int size, bool big_endian> | |
4734 | void | |
4735 | Target_powerpc<size, big_endian>::scan_relocatable_relocs( | |
d83ce4e3 AM |
4736 | Symbol_table* symtab, |
4737 | Layout* layout, | |
4738 | Sized_relobj_file<size, big_endian>* object, | |
4739 | unsigned int data_shndx, | |
4740 | unsigned int sh_type, | |
4741 | const unsigned char* prelocs, | |
4742 | size_t reloc_count, | |
4743 | Output_section* output_section, | |
4744 | bool needs_special_offset_handling, | |
4745 | size_t local_symbol_count, | |
4746 | const unsigned char* plocal_symbols, | |
4747 | Relocatable_relocs* rr) | |
42cacb20 DE |
4748 | { |
4749 | gold_assert(sh_type == elfcpp::SHT_RELA); | |
4750 | ||
42cacb20 | 4751 | gold::scan_relocatable_relocs<size, big_endian, elfcpp::SHT_RELA, |
d83ce4e3 | 4752 | Powerpc_scan_relocatable_reloc>( |
42cacb20 DE |
4753 | symtab, |
4754 | layout, | |
4755 | object, | |
4756 | data_shndx, | |
4757 | prelocs, | |
4758 | reloc_count, | |
4759 | output_section, | |
4760 | needs_special_offset_handling, | |
4761 | local_symbol_count, | |
4762 | plocal_symbols, | |
4763 | rr); | |
4764 | } | |
4765 | ||
7404fe1b | 4766 | // Emit relocations for a section. |
dd93cd0a AM |
4767 | // This is a modified version of the function by the same name in |
4768 | // target-reloc.h. Using relocate_special_relocatable for | |
4769 | // R_PPC_PLTREL24 would require duplication of the entire body of the | |
4770 | // loop, so we may as well duplicate the whole thing. | |
42cacb20 DE |
4771 | |
4772 | template<int size, bool big_endian> | |
4773 | void | |
7404fe1b | 4774 | Target_powerpc<size, big_endian>::relocate_relocs( |
42cacb20 DE |
4775 | const Relocate_info<size, big_endian>* relinfo, |
4776 | unsigned int sh_type, | |
4777 | const unsigned char* prelocs, | |
4778 | size_t reloc_count, | |
4779 | Output_section* output_section, | |
4780 | off_t offset_in_output_section, | |
4781 | const Relocatable_relocs* rr, | |
cf43a2fe | 4782 | unsigned char*, |
dd93cd0a | 4783 | Address view_address, |
cf43a2fe | 4784 | section_size_type, |
42cacb20 DE |
4785 | unsigned char* reloc_view, |
4786 | section_size_type reloc_view_size) | |
4787 | { | |
4788 | gold_assert(sh_type == elfcpp::SHT_RELA); | |
4789 | ||
cf43a2fe AM |
4790 | typedef typename Reloc_types<elfcpp::SHT_RELA, size, big_endian>::Reloc |
4791 | Reltype; | |
4792 | typedef typename Reloc_types<elfcpp::SHT_RELA, size, big_endian>::Reloc_write | |
4793 | Reltype_write; | |
4794 | const int reloc_size | |
4795 | = Reloc_types<elfcpp::SHT_RELA, size, big_endian>::reloc_size; | |
cf43a2fe AM |
4796 | |
4797 | Powerpc_relobj<size, big_endian>* const object | |
4798 | = static_cast<Powerpc_relobj<size, big_endian>*>(relinfo->object); | |
4799 | const unsigned int local_count = object->local_symbol_count(); | |
4800 | unsigned int got2_shndx = object->got2_shndx(); | |
c9269dff | 4801 | Address got2_addend = 0; |
cf43a2fe | 4802 | if (got2_shndx != 0) |
c9269dff AM |
4803 | { |
4804 | got2_addend = object->get_output_section_offset(got2_shndx); | |
4805 | gold_assert(got2_addend != invalid_address); | |
4806 | } | |
cf43a2fe AM |
4807 | |
4808 | unsigned char* pwrite = reloc_view; | |
7404fe1b | 4809 | bool zap_next = false; |
cf43a2fe AM |
4810 | for (size_t i = 0; i < reloc_count; ++i, prelocs += reloc_size) |
4811 | { | |
4812 | Relocatable_relocs::Reloc_strategy strategy = rr->strategy(i); | |
4813 | if (strategy == Relocatable_relocs::RELOC_DISCARD) | |
4814 | continue; | |
4815 | ||
4816 | Reltype reloc(prelocs); | |
4817 | Reltype_write reloc_write(pwrite); | |
4818 | ||
7404fe1b | 4819 | Address offset = reloc.get_r_offset(); |
cf43a2fe | 4820 | typename elfcpp::Elf_types<size>::Elf_WXword r_info = reloc.get_r_info(); |
7404fe1b AM |
4821 | unsigned int r_sym = elfcpp::elf_r_sym<size>(r_info); |
4822 | unsigned int r_type = elfcpp::elf_r_type<size>(r_info); | |
4823 | const unsigned int orig_r_sym = r_sym; | |
4824 | typename elfcpp::Elf_types<size>::Elf_Swxword addend | |
4825 | = reloc.get_r_addend(); | |
4826 | const Symbol* gsym = NULL; | |
4827 | ||
4828 | if (zap_next) | |
4829 | { | |
4830 | // We could arrange to discard these and other relocs for | |
4831 | // tls optimised sequences in the strategy methods, but for | |
4832 | // now do as BFD ld does. | |
4833 | r_type = elfcpp::R_POWERPC_NONE; | |
4834 | zap_next = false; | |
4835 | } | |
cf43a2fe AM |
4836 | |
4837 | // Get the new symbol index. | |
cf43a2fe AM |
4838 | if (r_sym < local_count) |
4839 | { | |
4840 | switch (strategy) | |
4841 | { | |
4842 | case Relocatable_relocs::RELOC_COPY: | |
4843 | case Relocatable_relocs::RELOC_SPECIAL: | |
7404fe1b | 4844 | if (r_sym != 0) |
dd93cd0a | 4845 | { |
7404fe1b AM |
4846 | r_sym = object->symtab_index(r_sym); |
4847 | gold_assert(r_sym != -1U); | |
dd93cd0a | 4848 | } |
cf43a2fe AM |
4849 | break; |
4850 | ||
4851 | case Relocatable_relocs::RELOC_ADJUST_FOR_SECTION_RELA: | |
4852 | { | |
4853 | // We are adjusting a section symbol. We need to find | |
4854 | // the symbol table index of the section symbol for | |
4855 | // the output section corresponding to input section | |
4856 | // in which this symbol is defined. | |
4857 | gold_assert(r_sym < local_count); | |
4858 | bool is_ordinary; | |
4859 | unsigned int shndx = | |
4860 | object->local_symbol_input_shndx(r_sym, &is_ordinary); | |
4861 | gold_assert(is_ordinary); | |
4862 | Output_section* os = object->output_section(shndx); | |
4863 | gold_assert(os != NULL); | |
4864 | gold_assert(os->needs_symtab_index()); | |
7404fe1b | 4865 | r_sym = os->symtab_index(); |
cf43a2fe AM |
4866 | } |
4867 | break; | |
4868 | ||
4869 | default: | |
4870 | gold_unreachable(); | |
4871 | } | |
4872 | } | |
4873 | else | |
4874 | { | |
7404fe1b | 4875 | gsym = object->global_symbol(r_sym); |
cf43a2fe AM |
4876 | gold_assert(gsym != NULL); |
4877 | if (gsym->is_forwarder()) | |
4878 | gsym = relinfo->symtab->resolve_forwards(gsym); | |
4879 | ||
4880 | gold_assert(gsym->has_symtab_index()); | |
7404fe1b | 4881 | r_sym = gsym->symtab_index(); |
cf43a2fe AM |
4882 | } |
4883 | ||
4884 | // Get the new offset--the location in the output section where | |
4885 | // this relocation should be applied. | |
cf43a2fe | 4886 | if (static_cast<Address>(offset_in_output_section) != invalid_address) |
7404fe1b | 4887 | offset += offset_in_output_section; |
cf43a2fe AM |
4888 | else |
4889 | { | |
c9269dff AM |
4890 | section_offset_type sot_offset = |
4891 | convert_types<section_offset_type, Address>(offset); | |
cf43a2fe | 4892 | section_offset_type new_sot_offset = |
c9269dff AM |
4893 | output_section->output_offset(object, relinfo->data_shndx, |
4894 | sot_offset); | |
cf43a2fe | 4895 | gold_assert(new_sot_offset != -1); |
7404fe1b | 4896 | offset = new_sot_offset; |
cf43a2fe AM |
4897 | } |
4898 | ||
dd93cd0a AM |
4899 | // In an object file, r_offset is an offset within the section. |
4900 | // In an executable or dynamic object, generated by | |
4901 | // --emit-relocs, r_offset is an absolute address. | |
7404fe1b | 4902 | if (!parameters->options().relocatable()) |
dd93cd0a | 4903 | { |
7404fe1b | 4904 | offset += view_address; |
dd93cd0a | 4905 | if (static_cast<Address>(offset_in_output_section) != invalid_address) |
7404fe1b | 4906 | offset -= offset_in_output_section; |
dd93cd0a AM |
4907 | } |
4908 | ||
cf43a2fe | 4909 | // Handle the reloc addend based on the strategy. |
cf43a2fe AM |
4910 | if (strategy == Relocatable_relocs::RELOC_COPY) |
4911 | ; | |
4912 | else if (strategy == Relocatable_relocs::RELOC_ADJUST_FOR_SECTION_RELA) | |
4913 | { | |
7404fe1b | 4914 | const Symbol_value<size>* psymval = object->local_symbol(orig_r_sym); |
cf43a2fe AM |
4915 | addend = psymval->value(object, addend); |
4916 | } | |
4917 | else if (strategy == Relocatable_relocs::RELOC_SPECIAL) | |
4918 | { | |
4919 | if (addend >= 32768) | |
4920 | addend += got2_addend; | |
4921 | } | |
4922 | else | |
4923 | gold_unreachable(); | |
4924 | ||
7404fe1b AM |
4925 | if (!parameters->options().relocatable()) |
4926 | { | |
4927 | if (r_type == elfcpp::R_POWERPC_GOT_TLSGD16 | |
4928 | || r_type == elfcpp::R_POWERPC_GOT_TLSGD16_LO | |
4929 | || r_type == elfcpp::R_POWERPC_GOT_TLSGD16_HI | |
4930 | || r_type == elfcpp::R_POWERPC_GOT_TLSGD16_HA) | |
4931 | { | |
4932 | // First instruction of a global dynamic sequence, | |
4933 | // arg setup insn. | |
4934 | const bool final = gsym == NULL || gsym->final_value_is_known(); | |
4935 | switch (this->optimize_tls_gd(final)) | |
4936 | { | |
4937 | case tls::TLSOPT_TO_IE: | |
4938 | r_type += (elfcpp::R_POWERPC_GOT_TPREL16 | |
4939 | - elfcpp::R_POWERPC_GOT_TLSGD16); | |
4940 | break; | |
4941 | case tls::TLSOPT_TO_LE: | |
4942 | if (r_type == elfcpp::R_POWERPC_GOT_TLSGD16 | |
4943 | || r_type == elfcpp::R_POWERPC_GOT_TLSGD16_LO) | |
4944 | r_type = elfcpp::R_POWERPC_TPREL16_HA; | |
4945 | else | |
4946 | { | |
4947 | r_type = elfcpp::R_POWERPC_NONE; | |
4948 | offset -= 2 * big_endian; | |
4949 | } | |
4950 | break; | |
4951 | default: | |
4952 | break; | |
4953 | } | |
4954 | } | |
4955 | else if (r_type == elfcpp::R_POWERPC_GOT_TLSLD16 | |
4956 | || r_type == elfcpp::R_POWERPC_GOT_TLSLD16_LO | |
4957 | || r_type == elfcpp::R_POWERPC_GOT_TLSLD16_HI | |
4958 | || r_type == elfcpp::R_POWERPC_GOT_TLSLD16_HA) | |
4959 | { | |
4960 | // First instruction of a local dynamic sequence, | |
4961 | // arg setup insn. | |
4962 | if (this->optimize_tls_ld() == tls::TLSOPT_TO_LE) | |
4963 | { | |
4964 | if (r_type == elfcpp::R_POWERPC_GOT_TLSLD16 | |
4965 | || r_type == elfcpp::R_POWERPC_GOT_TLSLD16_LO) | |
4966 | { | |
4967 | r_type = elfcpp::R_POWERPC_TPREL16_HA; | |
4968 | const Output_section* os = relinfo->layout->tls_segment() | |
4969 | ->first_section(); | |
4970 | gold_assert(os != NULL); | |
4971 | gold_assert(os->needs_symtab_index()); | |
4972 | r_sym = os->symtab_index(); | |
4973 | addend = dtp_offset; | |
4974 | } | |
4975 | else | |
4976 | { | |
4977 | r_type = elfcpp::R_POWERPC_NONE; | |
4978 | offset -= 2 * big_endian; | |
4979 | } | |
4980 | } | |
4981 | } | |
4982 | else if (r_type == elfcpp::R_POWERPC_GOT_TPREL16 | |
4983 | || r_type == elfcpp::R_POWERPC_GOT_TPREL16_LO | |
4984 | || r_type == elfcpp::R_POWERPC_GOT_TPREL16_HI | |
4985 | || r_type == elfcpp::R_POWERPC_GOT_TPREL16_HA) | |
4986 | { | |
4987 | // First instruction of initial exec sequence. | |
4988 | const bool final = gsym == NULL || gsym->final_value_is_known(); | |
4989 | if (this->optimize_tls_ie(final) == tls::TLSOPT_TO_LE) | |
4990 | { | |
4991 | if (r_type == elfcpp::R_POWERPC_GOT_TPREL16 | |
4992 | || r_type == elfcpp::R_POWERPC_GOT_TPREL16_LO) | |
4993 | r_type = elfcpp::R_POWERPC_TPREL16_HA; | |
4994 | else | |
4995 | { | |
4996 | r_type = elfcpp::R_POWERPC_NONE; | |
4997 | offset -= 2 * big_endian; | |
4998 | } | |
4999 | } | |
5000 | } | |
5001 | else if ((size == 64 && r_type == elfcpp::R_PPC64_TLSGD) | |
5002 | || (size == 32 && r_type == elfcpp::R_PPC_TLSGD)) | |
5003 | { | |
5004 | // Second instruction of a global dynamic sequence, | |
5005 | // the __tls_get_addr call | |
5006 | const bool final = gsym == NULL || gsym->final_value_is_known(); | |
5007 | switch (this->optimize_tls_gd(final)) | |
5008 | { | |
5009 | case tls::TLSOPT_TO_IE: | |
5010 | r_type = elfcpp::R_POWERPC_NONE; | |
5011 | zap_next = true; | |
5012 | break; | |
5013 | case tls::TLSOPT_TO_LE: | |
5014 | r_type = elfcpp::R_POWERPC_TPREL16_LO; | |
5015 | offset += 2 * big_endian; | |
5016 | zap_next = true; | |
5017 | break; | |
5018 | default: | |
5019 | break; | |
5020 | } | |
5021 | } | |
5022 | else if ((size == 64 && r_type == elfcpp::R_PPC64_TLSLD) | |
5023 | || (size == 32 && r_type == elfcpp::R_PPC_TLSLD)) | |
5024 | { | |
5025 | // Second instruction of a local dynamic sequence, | |
5026 | // the __tls_get_addr call | |
5027 | if (this->optimize_tls_ld() == tls::TLSOPT_TO_LE) | |
5028 | { | |
5029 | const Output_section* os = relinfo->layout->tls_segment() | |
5030 | ->first_section(); | |
5031 | gold_assert(os != NULL); | |
5032 | gold_assert(os->needs_symtab_index()); | |
5033 | r_sym = os->symtab_index(); | |
5034 | addend = dtp_offset; | |
5035 | r_type = elfcpp::R_POWERPC_TPREL16_LO; | |
5036 | offset += 2 * big_endian; | |
5037 | zap_next = true; | |
5038 | } | |
5039 | } | |
5040 | else if (r_type == elfcpp::R_POWERPC_TLS) | |
5041 | { | |
5042 | // Second instruction of an initial exec sequence | |
5043 | const bool final = gsym == NULL || gsym->final_value_is_known(); | |
5044 | if (this->optimize_tls_ie(final) == tls::TLSOPT_TO_LE) | |
5045 | { | |
5046 | r_type = elfcpp::R_POWERPC_TPREL16_LO; | |
5047 | offset += 2 * big_endian; | |
5048 | } | |
5049 | } | |
5050 | } | |
5051 | ||
5052 | reloc_write.put_r_offset(offset); | |
5053 | reloc_write.put_r_info(elfcpp::elf_r_info<size>(r_sym, r_type)); | |
5054 | reloc_write.put_r_addend(addend); | |
cf43a2fe AM |
5055 | |
5056 | pwrite += reloc_size; | |
5057 | } | |
5058 | ||
5059 | gold_assert(static_cast<section_size_type>(pwrite - reloc_view) | |
5060 | == reloc_view_size); | |
42cacb20 DE |
5061 | } |
5062 | ||
5063 | // Return the value to use for a dynamic which requires special | |
5064 | // treatment. This is how we support equality comparisons of function | |
5065 | // pointers across shared library boundaries, as described in the | |
5066 | // processor specific ABI supplement. | |
5067 | ||
5068 | template<int size, bool big_endian> | |
5069 | uint64_t | |
5070 | Target_powerpc<size, big_endian>::do_dynsym_value(const Symbol* gsym) const | |
5071 | { | |
cf43a2fe AM |
5072 | if (size == 32) |
5073 | { | |
5074 | gold_assert(gsym->is_from_dynobj() && gsym->has_plt_offset()); | |
e5d5f5ed | 5075 | const Output_data_glink<size, big_endian>* glink = this->glink_section(); |
c9824451 AM |
5076 | unsigned int glink_index = glink->find_entry(gsym); |
5077 | return glink->address() + glink_index * glink->glink_entry_size(); | |
5078 | } | |
5079 | else | |
5080 | gold_unreachable(); | |
5081 | } | |
5082 | ||
5083 | // Return the PLT address to use for a local symbol. | |
5084 | template<int size, bool big_endian> | |
5085 | uint64_t | |
5086 | Target_powerpc<size, big_endian>::do_plt_address_for_local( | |
5087 | const Relobj* object, | |
5088 | unsigned int symndx) const | |
5089 | { | |
5090 | if (size == 32) | |
5091 | { | |
5092 | const Sized_relobj<size, big_endian>* relobj | |
5093 | = static_cast<const Sized_relobj<size, big_endian>*>(object); | |
5094 | const Output_data_glink<size, big_endian>* glink = this->glink_section(); | |
5095 | unsigned int glink_index = glink->find_entry(relobj->sized_relobj(), | |
5096 | symndx); | |
5097 | return glink->address() + glink_index * glink->glink_entry_size(); | |
5098 | } | |
5099 | else | |
5100 | gold_unreachable(); | |
5101 | } | |
5102 | ||
5103 | // Return the PLT address to use for a global symbol. | |
5104 | template<int size, bool big_endian> | |
5105 | uint64_t | |
5106 | Target_powerpc<size, big_endian>::do_plt_address_for_global( | |
5107 | const Symbol* gsym) const | |
5108 | { | |
5109 | if (size == 32) | |
5110 | { | |
5111 | const Output_data_glink<size, big_endian>* glink = this->glink_section(); | |
5112 | unsigned int glink_index = glink->find_entry(gsym); | |
e5d5f5ed | 5113 | return glink->address() + glink_index * glink->glink_entry_size(); |
cf43a2fe AM |
5114 | } |
5115 | else | |
5116 | gold_unreachable(); | |
42cacb20 DE |
5117 | } |
5118 | ||
bd73a62d AM |
5119 | // Return the offset to use for the GOT_INDX'th got entry which is |
5120 | // for a local tls symbol specified by OBJECT, SYMNDX. | |
5121 | template<int size, bool big_endian> | |
5122 | int64_t | |
5123 | Target_powerpc<size, big_endian>::do_tls_offset_for_local( | |
5124 | const Relobj* object, | |
5125 | unsigned int symndx, | |
5126 | unsigned int got_indx) const | |
5127 | { | |
5128 | const Powerpc_relobj<size, big_endian>* ppc_object | |
5129 | = static_cast<const Powerpc_relobj<size, big_endian>*>(object); | |
5130 | if (ppc_object->local_symbol(symndx)->is_tls_symbol()) | |
5131 | { | |
5132 | for (Got_type got_type = GOT_TYPE_TLSGD; | |
5133 | got_type <= GOT_TYPE_TPREL; | |
5134 | got_type = Got_type(got_type + 1)) | |
5135 | if (ppc_object->local_has_got_offset(symndx, got_type)) | |
5136 | { | |
5137 | unsigned int off = ppc_object->local_got_offset(symndx, got_type); | |
5138 | if (got_type == GOT_TYPE_TLSGD) | |
5139 | off += size / 8; | |
5140 | if (off == got_indx * (size / 8)) | |
5141 | { | |
5142 | if (got_type == GOT_TYPE_TPREL) | |
5143 | return -tp_offset; | |
5144 | else | |
5145 | return -dtp_offset; | |
5146 | } | |
5147 | } | |
5148 | } | |
5149 | gold_unreachable(); | |
5150 | } | |
5151 | ||
5152 | // Return the offset to use for the GOT_INDX'th got entry which is | |
5153 | // for global tls symbol GSYM. | |
5154 | template<int size, bool big_endian> | |
5155 | int64_t | |
5156 | Target_powerpc<size, big_endian>::do_tls_offset_for_global( | |
5157 | Symbol* gsym, | |
5158 | unsigned int got_indx) const | |
5159 | { | |
5160 | if (gsym->type() == elfcpp::STT_TLS) | |
5161 | { | |
5162 | for (Got_type got_type = GOT_TYPE_TLSGD; | |
5163 | got_type <= GOT_TYPE_TPREL; | |
5164 | got_type = Got_type(got_type + 1)) | |
5165 | if (gsym->has_got_offset(got_type)) | |
5166 | { | |
5167 | unsigned int off = gsym->got_offset(got_type); | |
5168 | if (got_type == GOT_TYPE_TLSGD) | |
5169 | off += size / 8; | |
5170 | if (off == got_indx * (size / 8)) | |
5171 | { | |
5172 | if (got_type == GOT_TYPE_TPREL) | |
5173 | return -tp_offset; | |
5174 | else | |
5175 | return -dtp_offset; | |
5176 | } | |
5177 | } | |
5178 | } | |
5179 | gold_unreachable(); | |
5180 | } | |
5181 | ||
42cacb20 DE |
5182 | // The selector for powerpc object files. |
5183 | ||
5184 | template<int size, bool big_endian> | |
5185 | class Target_selector_powerpc : public Target_selector | |
5186 | { | |
5187 | public: | |
5188 | Target_selector_powerpc() | |
5189 | : Target_selector(elfcpp::EM_NONE, size, big_endian, | |
03ef7571 ILT |
5190 | (size == 64 |
5191 | ? (big_endian ? "elf64-powerpc" : "elf64-powerpcle") | |
5192 | : (big_endian ? "elf32-powerpc" : "elf32-powerpcle")), | |
5193 | (size == 64 | |
5194 | ? (big_endian ? "elf64ppc" : "elf64lppc") | |
5195 | : (big_endian ? "elf32ppc" : "elf32lppc"))) | |
42cacb20 DE |
5196 | { } |
5197 | ||
2e702c99 RM |
5198 | virtual Target* |
5199 | do_recognize(Input_file*, off_t, int machine, int, int) | |
42cacb20 DE |
5200 | { |
5201 | switch (size) | |
5202 | { | |
5203 | case 64: | |
2ea97941 | 5204 | if (machine != elfcpp::EM_PPC64) |
42cacb20 DE |
5205 | return NULL; |
5206 | break; | |
5207 | ||
5208 | case 32: | |
2ea97941 | 5209 | if (machine != elfcpp::EM_PPC) |
42cacb20 DE |
5210 | return NULL; |
5211 | break; | |
5212 | ||
5213 | default: | |
5214 | return NULL; | |
5215 | } | |
5216 | ||
7f055c20 | 5217 | return this->instantiate_target(); |
42cacb20 DE |
5218 | } |
5219 | ||
2e702c99 RM |
5220 | virtual Target* |
5221 | do_instantiate_target() | |
7f055c20 | 5222 | { return new Target_powerpc<size, big_endian>(); } |
42cacb20 DE |
5223 | }; |
5224 | ||
5225 | Target_selector_powerpc<32, true> target_selector_ppc32; | |
5226 | Target_selector_powerpc<32, false> target_selector_ppc32le; | |
5227 | Target_selector_powerpc<64, true> target_selector_ppc64; | |
5228 | Target_selector_powerpc<64, false> target_selector_ppc64le; | |
5229 | ||
5230 | } // End anonymous namespace. |