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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 | ||
f3a0ed29 AM |
328 | // Provide linker defined save/restore functions. |
329 | void | |
330 | define_save_restore_funcs(Layout*, Symbol_table*); | |
331 | ||
42cacb20 DE |
332 | // Finalize the sections. |
333 | void | |
f59f41f3 | 334 | do_finalize_sections(Layout*, const Input_objects*, Symbol_table*); |
42cacb20 DE |
335 | |
336 | // Return the value to use for a dynamic which requires special | |
337 | // treatment. | |
338 | uint64_t | |
339 | do_dynsym_value(const Symbol*) const; | |
340 | ||
c9824451 AM |
341 | // Return the PLT address to use for a local symbol. |
342 | uint64_t | |
343 | do_plt_address_for_local(const Relobj*, unsigned int) const; | |
344 | ||
345 | // Return the PLT address to use for a global symbol. | |
346 | uint64_t | |
347 | do_plt_address_for_global(const Symbol*) const; | |
348 | ||
bd73a62d AM |
349 | // Return the offset to use for the GOT_INDX'th got entry which is |
350 | // for a local tls symbol specified by OBJECT, SYMNDX. | |
351 | int64_t | |
352 | do_tls_offset_for_local(const Relobj* object, | |
353 | unsigned int symndx, | |
354 | unsigned int got_indx) const; | |
355 | ||
356 | // Return the offset to use for the GOT_INDX'th got entry which is | |
357 | // for global tls symbol GSYM. | |
358 | int64_t | |
359 | do_tls_offset_for_global(Symbol* gsym, unsigned int got_indx) const; | |
360 | ||
42cacb20 DE |
361 | // Relocate a section. |
362 | void | |
363 | relocate_section(const Relocate_info<size, big_endian>*, | |
364 | unsigned int sh_type, | |
365 | const unsigned char* prelocs, | |
366 | size_t reloc_count, | |
367 | Output_section* output_section, | |
368 | bool needs_special_offset_handling, | |
369 | unsigned char* view, | |
c9269dff | 370 | Address view_address, |
364c7fa5 ILT |
371 | section_size_type view_size, |
372 | const Reloc_symbol_changes*); | |
42cacb20 DE |
373 | |
374 | // Scan the relocs during a relocatable link. | |
375 | void | |
ad0f2072 | 376 | scan_relocatable_relocs(Symbol_table* symtab, |
42cacb20 | 377 | Layout* layout, |
6fa2a40b | 378 | Sized_relobj_file<size, big_endian>* object, |
42cacb20 DE |
379 | unsigned int data_shndx, |
380 | unsigned int sh_type, | |
381 | const unsigned char* prelocs, | |
382 | size_t reloc_count, | |
383 | Output_section* output_section, | |
384 | bool needs_special_offset_handling, | |
385 | size_t local_symbol_count, | |
386 | const unsigned char* plocal_symbols, | |
387 | Relocatable_relocs*); | |
388 | ||
7404fe1b | 389 | // Emit relocations for a section. |
42cacb20 | 390 | void |
7404fe1b AM |
391 | relocate_relocs(const Relocate_info<size, big_endian>*, |
392 | unsigned int sh_type, | |
393 | const unsigned char* prelocs, | |
394 | size_t reloc_count, | |
395 | Output_section* output_section, | |
396 | off_t offset_in_output_section, | |
397 | const Relocatable_relocs*, | |
398 | unsigned char*, | |
399 | Address view_address, | |
400 | section_size_type, | |
401 | unsigned char* reloc_view, | |
402 | section_size_type reloc_view_size); | |
42cacb20 DE |
403 | |
404 | // Return whether SYM is defined by the ABI. | |
405 | bool | |
9c2d0ef9 | 406 | do_is_defined_by_abi(const Symbol* sym) const |
42cacb20 | 407 | { |
cf43a2fe | 408 | return strcmp(sym->name(), "__tls_get_addr") == 0; |
42cacb20 DE |
409 | } |
410 | ||
411 | // Return the size of the GOT section. | |
412 | section_size_type | |
0e70b911 | 413 | got_size() const |
42cacb20 DE |
414 | { |
415 | gold_assert(this->got_ != NULL); | |
416 | return this->got_->data_size(); | |
417 | } | |
418 | ||
cf43a2fe AM |
419 | // Get the PLT section. |
420 | const Output_data_plt_powerpc<size, big_endian>* | |
421 | plt_section() const | |
422 | { | |
423 | gold_assert(this->plt_ != NULL); | |
424 | return this->plt_; | |
425 | } | |
426 | ||
e5d5f5ed AM |
427 | // Get the IPLT section. |
428 | const Output_data_plt_powerpc<size, big_endian>* | |
429 | iplt_section() const | |
430 | { | |
431 | gold_assert(this->iplt_ != NULL); | |
432 | return this->iplt_; | |
433 | } | |
434 | ||
cf43a2fe AM |
435 | // Get the .glink section. |
436 | const Output_data_glink<size, big_endian>* | |
437 | glink_section() const | |
438 | { | |
439 | gold_assert(this->glink_ != NULL); | |
440 | return this->glink_; | |
441 | } | |
442 | ||
443 | // Get the GOT section. | |
444 | const Output_data_got_powerpc<size, big_endian>* | |
445 | got_section() const | |
446 | { | |
447 | gold_assert(this->got_ != NULL); | |
448 | return this->got_; | |
449 | } | |
450 | ||
cf43a2fe AM |
451 | Object* |
452 | do_make_elf_object(const std::string&, Input_file*, off_t, | |
453 | const elfcpp::Ehdr<size, big_endian>&); | |
454 | ||
0e70b911 CC |
455 | // Return the number of entries in the GOT. |
456 | unsigned int | |
457 | got_entry_count() const | |
458 | { | |
459 | if (this->got_ == NULL) | |
460 | return 0; | |
461 | return this->got_size() / (size / 8); | |
462 | } | |
463 | ||
464 | // Return the number of entries in the PLT. | |
465 | unsigned int | |
466 | plt_entry_count() const; | |
467 | ||
468 | // Return the offset of the first non-reserved PLT entry. | |
469 | unsigned int | |
470 | first_plt_entry_offset() const; | |
471 | ||
472 | // Return the size of each PLT entry. | |
473 | unsigned int | |
474 | plt_entry_size() const; | |
475 | ||
e81fea4d AM |
476 | // Add any special sections for this symbol to the gc work list. |
477 | // For powerpc64, this adds the code section of a function | |
478 | // descriptor. | |
479 | void | |
480 | do_gc_mark_symbol(Symbol_table* symtab, Symbol* sym) const; | |
481 | ||
482 | // Handle target specific gc actions when adding a gc reference from | |
483 | // SRC_OBJ, SRC_SHNDX to a location specified by DST_OBJ, DST_SHNDX | |
484 | // and DST_OFF. For powerpc64, this adds a referenc to the code | |
485 | // section of a function descriptor. | |
486 | void | |
487 | do_gc_add_reference(Symbol_table* symtab, | |
488 | Object* src_obj, | |
489 | unsigned int src_shndx, | |
490 | Object* dst_obj, | |
491 | unsigned int dst_shndx, | |
492 | Address dst_off) const; | |
493 | ||
42cacb20 DE |
494 | private: |
495 | ||
496 | // The class which scans relocations. | |
497 | class Scan | |
498 | { | |
499 | public: | |
bfdfa4cd AM |
500 | typedef typename elfcpp::Elf_types<size>::Elf_Addr Address; |
501 | ||
42cacb20 DE |
502 | Scan() |
503 | : issued_non_pic_error_(false) | |
504 | { } | |
505 | ||
95a2c8d6 RS |
506 | static inline int |
507 | get_reference_flags(unsigned int r_type); | |
508 | ||
42cacb20 | 509 | inline void |
ad0f2072 | 510 | local(Symbol_table* symtab, Layout* layout, Target_powerpc* target, |
6fa2a40b | 511 | Sized_relobj_file<size, big_endian>* object, |
42cacb20 DE |
512 | unsigned int data_shndx, |
513 | Output_section* output_section, | |
514 | const elfcpp::Rela<size, big_endian>& reloc, unsigned int r_type, | |
bfdfa4cd AM |
515 | const elfcpp::Sym<size, big_endian>& lsym, |
516 | bool is_discarded); | |
42cacb20 DE |
517 | |
518 | inline void | |
ad0f2072 | 519 | global(Symbol_table* symtab, Layout* layout, Target_powerpc* target, |
6fa2a40b | 520 | Sized_relobj_file<size, big_endian>* object, |
42cacb20 DE |
521 | unsigned int data_shndx, |
522 | Output_section* output_section, | |
523 | const elfcpp::Rela<size, big_endian>& reloc, unsigned int r_type, | |
524 | Symbol* gsym); | |
525 | ||
21bb3914 ST |
526 | inline bool |
527 | local_reloc_may_be_function_pointer(Symbol_table* , Layout* , | |
528 | Target_powerpc* , | |
2e702c99 | 529 | Sized_relobj_file<size, big_endian>* , |
21bb3914 | 530 | unsigned int , |
2e702c99 RM |
531 | Output_section* , |
532 | const elfcpp::Rela<size, big_endian>& , | |
533 | unsigned int , | |
534 | const elfcpp::Sym<size, big_endian>&) | |
21bb3914 ST |
535 | { return false; } |
536 | ||
537 | inline bool | |
538 | global_reloc_may_be_function_pointer(Symbol_table* , Layout* , | |
539 | Target_powerpc* , | |
2e702c99 RM |
540 | Sized_relobj_file<size, big_endian>* , |
541 | unsigned int , | |
542 | Output_section* , | |
543 | const elfcpp::Rela<size, | |
21bb3914 ST |
544 | big_endian>& , |
545 | unsigned int , Symbol*) | |
546 | { return false; } | |
547 | ||
42cacb20 DE |
548 | private: |
549 | static void | |
6fa2a40b | 550 | unsupported_reloc_local(Sized_relobj_file<size, big_endian>*, |
42cacb20 DE |
551 | unsigned int r_type); |
552 | ||
553 | static void | |
6fa2a40b | 554 | unsupported_reloc_global(Sized_relobj_file<size, big_endian>*, |
42cacb20 DE |
555 | unsigned int r_type, Symbol*); |
556 | ||
557 | static void | |
558 | generate_tls_call(Symbol_table* symtab, Layout* layout, | |
559 | Target_powerpc* target); | |
560 | ||
561 | void | |
562 | check_non_pic(Relobj*, unsigned int r_type); | |
563 | ||
e5d5f5ed AM |
564 | bool |
565 | reloc_needs_plt_for_ifunc(Sized_relobj_file<size, big_endian>* object, | |
566 | unsigned int r_type); | |
567 | ||
42cacb20 DE |
568 | // Whether we have issued an error about a non-PIC compilation. |
569 | bool issued_non_pic_error_; | |
570 | }; | |
571 | ||
3ea0a085 AM |
572 | Address |
573 | symval_for_branch(Address value, const Sized_symbol<size>* gsym, | |
574 | Powerpc_relobj<size, big_endian>* object, | |
575 | unsigned int *dest_shndx); | |
576 | ||
42cacb20 DE |
577 | // The class which implements relocation. |
578 | class Relocate | |
579 | { | |
580 | public: | |
dd93cd0a AM |
581 | // Use 'at' branch hints when true, 'y' when false. |
582 | // FIXME maybe: set this with an option. | |
583 | static const bool is_isa_v2 = true; | |
584 | ||
585 | enum skip_tls | |
586 | { | |
587 | CALL_NOT_EXPECTED = 0, | |
588 | CALL_EXPECTED = 1, | |
589 | CALL_SKIP = 2 | |
590 | }; | |
591 | ||
592 | Relocate() | |
593 | : call_tls_get_addr_(CALL_NOT_EXPECTED) | |
594 | { } | |
595 | ||
596 | ~Relocate() | |
597 | { | |
598 | if (this->call_tls_get_addr_ != CALL_NOT_EXPECTED) | |
599 | { | |
600 | // FIXME: This needs to specify the location somehow. | |
601 | gold_error(_("missing expected __tls_get_addr call")); | |
602 | } | |
603 | } | |
604 | ||
42cacb20 DE |
605 | // Do a relocation. Return false if the caller should not issue |
606 | // any warnings about this relocation. | |
607 | inline bool | |
608 | relocate(const Relocate_info<size, big_endian>*, Target_powerpc*, | |
031cdbed ILT |
609 | Output_section*, size_t relnum, |
610 | const elfcpp::Rela<size, big_endian>&, | |
42cacb20 DE |
611 | unsigned int r_type, const Sized_symbol<size>*, |
612 | const Symbol_value<size>*, | |
613 | unsigned char*, | |
614 | typename elfcpp::Elf_types<size>::Elf_Addr, | |
615 | section_size_type); | |
616 | ||
dd93cd0a AM |
617 | // This is set if we should skip the next reloc, which should be a |
618 | // call to __tls_get_addr. | |
619 | enum skip_tls call_tls_get_addr_; | |
42cacb20 DE |
620 | }; |
621 | ||
168a4726 AM |
622 | class Relocate_comdat_behavior |
623 | { | |
624 | public: | |
625 | // Decide what the linker should do for relocations that refer to | |
626 | // discarded comdat sections. | |
627 | inline Comdat_behavior | |
628 | get(const char* name) | |
629 | { | |
630 | gold::Default_comdat_behavior default_behavior; | |
631 | Comdat_behavior ret = default_behavior.get(name); | |
632 | if (ret == CB_WARNING) | |
633 | { | |
634 | if (size == 32 | |
635 | && (strcmp(name, ".fixup") == 0 | |
636 | || strcmp(name, ".got2") == 0)) | |
637 | ret = CB_IGNORE; | |
638 | if (size == 64 | |
639 | && (strcmp(name, ".opd") == 0 | |
640 | || strcmp(name, ".toc") == 0 | |
641 | || strcmp(name, ".toc1") == 0)) | |
642 | ret = CB_IGNORE; | |
643 | } | |
644 | return ret; | |
645 | } | |
646 | }; | |
647 | ||
42cacb20 DE |
648 | // A class which returns the size required for a relocation type, |
649 | // used while scanning relocs during a relocatable link. | |
650 | class Relocatable_size_for_reloc | |
651 | { | |
652 | public: | |
653 | unsigned int | |
cf43a2fe AM |
654 | get_size_for_reloc(unsigned int, Relobj*) |
655 | { | |
656 | gold_unreachable(); | |
657 | return 0; | |
658 | } | |
42cacb20 DE |
659 | }; |
660 | ||
dd93cd0a AM |
661 | // Optimize the TLS relocation type based on what we know about the |
662 | // symbol. IS_FINAL is true if the final address of this symbol is | |
663 | // known at link time. | |
664 | ||
665 | tls::Tls_optimization | |
666 | optimize_tls_gd(bool is_final) | |
667 | { | |
668 | // If we are generating a shared library, then we can't do anything | |
669 | // in the linker. | |
670 | if (parameters->options().shared()) | |
671 | return tls::TLSOPT_NONE; | |
672 | ||
673 | if (!is_final) | |
674 | return tls::TLSOPT_TO_IE; | |
675 | return tls::TLSOPT_TO_LE; | |
676 | } | |
677 | ||
678 | tls::Tls_optimization | |
679 | optimize_tls_ld() | |
680 | { | |
681 | if (parameters->options().shared()) | |
682 | return tls::TLSOPT_NONE; | |
683 | ||
684 | return tls::TLSOPT_TO_LE; | |
685 | } | |
686 | ||
687 | tls::Tls_optimization | |
688 | optimize_tls_ie(bool is_final) | |
689 | { | |
690 | if (!is_final || parameters->options().shared()) | |
691 | return tls::TLSOPT_NONE; | |
692 | ||
693 | return tls::TLSOPT_TO_LE; | |
694 | } | |
cf43a2fe | 695 | |
42cacb20 | 696 | // Get the GOT section, creating it if necessary. |
cf43a2fe | 697 | Output_data_got_powerpc<size, big_endian>* |
42cacb20 DE |
698 | got_section(Symbol_table*, Layout*); |
699 | ||
cf43a2fe AM |
700 | // Create glink. |
701 | void | |
702 | make_glink_section(Layout*); | |
42cacb20 | 703 | |
cf43a2fe AM |
704 | // Create the PLT section. |
705 | void | |
706 | make_plt_section(Layout*); | |
42cacb20 | 707 | |
e5d5f5ed | 708 | void |
c9824451 | 709 | make_iplt_section(Layout*); |
e5d5f5ed | 710 | |
42cacb20 DE |
711 | // Create a PLT entry for a global symbol. |
712 | void | |
c9824451 | 713 | make_plt_entry(Layout*, Symbol*, |
cf43a2fe | 714 | const elfcpp::Rela<size, big_endian>&, |
e5d5f5ed AM |
715 | const Sized_relobj_file<size, big_endian>* object); |
716 | ||
717 | // Create a PLT entry for a local IFUNC symbol. | |
718 | void | |
c9824451 | 719 | make_local_ifunc_plt_entry(Layout*, |
e5d5f5ed AM |
720 | const elfcpp::Rela<size, big_endian>&, |
721 | Sized_relobj_file<size, big_endian>*); | |
42cacb20 | 722 | |
dd93cd0a AM |
723 | // Create a GOT entry for local dynamic __tls_get_addr. |
724 | unsigned int | |
725 | tlsld_got_offset(Symbol_table* symtab, Layout* layout, | |
726 | Sized_relobj_file<size, big_endian>* object); | |
727 | ||
42cacb20 | 728 | unsigned int |
dd93cd0a AM |
729 | tlsld_got_offset() const |
730 | { | |
731 | return this->tlsld_got_offset_; | |
732 | } | |
42cacb20 | 733 | |
42cacb20 DE |
734 | // Get the dynamic reloc section, creating it if necessary. |
735 | Reloc_section* | |
736 | rela_dyn_section(Layout*); | |
737 | ||
42cacb20 DE |
738 | // Copy a relocation against a global symbol. |
739 | void | |
ef9beddf | 740 | copy_reloc(Symbol_table* symtab, Layout* layout, |
2e702c99 | 741 | Sized_relobj_file<size, big_endian>* object, |
42cacb20 DE |
742 | unsigned int shndx, Output_section* output_section, |
743 | Symbol* sym, const elfcpp::Rela<size, big_endian>& reloc) | |
744 | { | |
745 | this->copy_relocs_.copy_reloc(symtab, layout, | |
746 | symtab->get_sized_symbol<size>(sym), | |
747 | object, shndx, output_section, | |
748 | reloc, this->rela_dyn_section(layout)); | |
749 | } | |
750 | ||
751 | // Information about this specific target which we pass to the | |
752 | // general Target structure. | |
753 | static Target::Target_info powerpc_info; | |
754 | ||
755 | // The types of GOT entries needed for this platform. | |
0e70b911 CC |
756 | // These values are exposed to the ABI in an incremental link. |
757 | // Do not renumber existing values without changing the version | |
758 | // number of the .gnu_incremental_inputs section. | |
42cacb20 DE |
759 | enum Got_type |
760 | { | |
dd93cd0a AM |
761 | GOT_TYPE_STANDARD, |
762 | GOT_TYPE_TLSGD, // double entry for @got@tlsgd | |
763 | GOT_TYPE_DTPREL, // entry for @got@dtprel | |
764 | GOT_TYPE_TPREL // entry for @got@tprel | |
42cacb20 DE |
765 | }; |
766 | ||
cf43a2fe AM |
767 | // The GOT output section. |
768 | Output_data_got_powerpc<size, big_endian>* got_; | |
769 | // The PLT output section. | |
42cacb20 | 770 | Output_data_plt_powerpc<size, big_endian>* plt_; |
e5d5f5ed AM |
771 | // The IPLT output section. |
772 | Output_data_plt_powerpc<size, big_endian>* iplt_; | |
cf43a2fe AM |
773 | // The .glink output section. |
774 | Output_data_glink<size, big_endian>* glink_; | |
775 | // The dynamic reloc output section. | |
42cacb20 DE |
776 | Reloc_section* rela_dyn_; |
777 | // Relocs saved to avoid a COPY reloc. | |
778 | Copy_relocs<elfcpp::SHT_RELA, size, big_endian> copy_relocs_; | |
779 | // Space for variables copied with a COPY reloc. | |
780 | Output_data_space* dynbss_; | |
dd93cd0a AM |
781 | // Offset of the GOT entry for local dynamic __tls_get_addr calls. |
782 | unsigned int tlsld_got_offset_; | |
42cacb20 DE |
783 | }; |
784 | ||
785 | template<> | |
786 | Target::Target_info Target_powerpc<32, true>::powerpc_info = | |
787 | { | |
788 | 32, // size | |
789 | true, // is_big_endian | |
790 | elfcpp::EM_PPC, // machine_code | |
791 | false, // has_make_symbol | |
792 | false, // has_resolve | |
793 | false, // has_code_fill | |
794 | true, // is_default_stack_executable | |
b3ce541e | 795 | false, // can_icf_inline_merge_sections |
42cacb20 DE |
796 | '\0', // wrap_char |
797 | "/usr/lib/ld.so.1", // dynamic_linker | |
798 | 0x10000000, // default_text_segment_address | |
799 | 64 * 1024, // abi_pagesize (overridable by -z max-page-size) | |
8a5e3e08 | 800 | 4 * 1024, // common_pagesize (overridable by -z common-page-size) |
c9269dff AM |
801 | false, // isolate_execinstr |
802 | 0, // rosegment_gap | |
8a5e3e08 ILT |
803 | elfcpp::SHN_UNDEF, // small_common_shndx |
804 | elfcpp::SHN_UNDEF, // large_common_shndx | |
805 | 0, // small_common_section_flags | |
05a352e6 DK |
806 | 0, // large_common_section_flags |
807 | NULL, // attributes_section | |
808 | NULL // attributes_vendor | |
42cacb20 DE |
809 | }; |
810 | ||
811 | template<> | |
812 | Target::Target_info Target_powerpc<32, false>::powerpc_info = | |
813 | { | |
814 | 32, // size | |
815 | false, // is_big_endian | |
816 | elfcpp::EM_PPC, // machine_code | |
817 | false, // has_make_symbol | |
818 | false, // has_resolve | |
819 | false, // has_code_fill | |
820 | true, // is_default_stack_executable | |
b3ce541e | 821 | false, // can_icf_inline_merge_sections |
42cacb20 DE |
822 | '\0', // wrap_char |
823 | "/usr/lib/ld.so.1", // dynamic_linker | |
824 | 0x10000000, // default_text_segment_address | |
825 | 64 * 1024, // abi_pagesize (overridable by -z max-page-size) | |
8a5e3e08 | 826 | 4 * 1024, // common_pagesize (overridable by -z common-page-size) |
c9269dff AM |
827 | false, // isolate_execinstr |
828 | 0, // rosegment_gap | |
8a5e3e08 ILT |
829 | elfcpp::SHN_UNDEF, // small_common_shndx |
830 | elfcpp::SHN_UNDEF, // large_common_shndx | |
831 | 0, // small_common_section_flags | |
05a352e6 DK |
832 | 0, // large_common_section_flags |
833 | NULL, // attributes_section | |
834 | NULL // attributes_vendor | |
42cacb20 DE |
835 | }; |
836 | ||
837 | template<> | |
838 | Target::Target_info Target_powerpc<64, true>::powerpc_info = | |
839 | { | |
840 | 64, // size | |
841 | true, // is_big_endian | |
842 | elfcpp::EM_PPC64, // machine_code | |
843 | false, // has_make_symbol | |
844 | false, // has_resolve | |
845 | false, // has_code_fill | |
846 | true, // is_default_stack_executable | |
b3ce541e | 847 | false, // can_icf_inline_merge_sections |
42cacb20 DE |
848 | '\0', // wrap_char |
849 | "/usr/lib/ld.so.1", // dynamic_linker | |
850 | 0x10000000, // default_text_segment_address | |
851 | 64 * 1024, // abi_pagesize (overridable by -z max-page-size) | |
dd93cd0a | 852 | 4 * 1024, // common_pagesize (overridable by -z common-page-size) |
c9269dff AM |
853 | false, // isolate_execinstr |
854 | 0, // rosegment_gap | |
8a5e3e08 ILT |
855 | elfcpp::SHN_UNDEF, // small_common_shndx |
856 | elfcpp::SHN_UNDEF, // large_common_shndx | |
857 | 0, // small_common_section_flags | |
05a352e6 DK |
858 | 0, // large_common_section_flags |
859 | NULL, // attributes_section | |
860 | NULL // attributes_vendor | |
42cacb20 DE |
861 | }; |
862 | ||
863 | template<> | |
864 | Target::Target_info Target_powerpc<64, false>::powerpc_info = | |
865 | { | |
866 | 64, // size | |
867 | false, // is_big_endian | |
868 | elfcpp::EM_PPC64, // machine_code | |
869 | false, // has_make_symbol | |
870 | false, // has_resolve | |
871 | false, // has_code_fill | |
872 | true, // is_default_stack_executable | |
b3ce541e | 873 | false, // can_icf_inline_merge_sections |
42cacb20 DE |
874 | '\0', // wrap_char |
875 | "/usr/lib/ld.so.1", // dynamic_linker | |
876 | 0x10000000, // default_text_segment_address | |
877 | 64 * 1024, // abi_pagesize (overridable by -z max-page-size) | |
dd93cd0a | 878 | 4 * 1024, // common_pagesize (overridable by -z common-page-size) |
c9269dff AM |
879 | false, // isolate_execinstr |
880 | 0, // rosegment_gap | |
8a5e3e08 ILT |
881 | elfcpp::SHN_UNDEF, // small_common_shndx |
882 | elfcpp::SHN_UNDEF, // large_common_shndx | |
883 | 0, // small_common_section_flags | |
05a352e6 DK |
884 | 0, // large_common_section_flags |
885 | NULL, // attributes_section | |
886 | NULL // attributes_vendor | |
42cacb20 DE |
887 | }; |
888 | ||
dd93cd0a AM |
889 | inline bool |
890 | is_branch_reloc(unsigned int r_type) | |
891 | { | |
892 | return (r_type == elfcpp::R_POWERPC_REL24 | |
893 | || r_type == elfcpp::R_PPC_PLTREL24 | |
894 | || r_type == elfcpp::R_PPC_LOCAL24PC | |
895 | || r_type == elfcpp::R_POWERPC_REL14 | |
896 | || r_type == elfcpp::R_POWERPC_REL14_BRTAKEN | |
897 | || r_type == elfcpp::R_POWERPC_REL14_BRNTAKEN | |
898 | || r_type == elfcpp::R_POWERPC_ADDR24 | |
899 | || r_type == elfcpp::R_POWERPC_ADDR14 | |
900 | || r_type == elfcpp::R_POWERPC_ADDR14_BRTAKEN | |
901 | || r_type == elfcpp::R_POWERPC_ADDR14_BRNTAKEN); | |
902 | } | |
903 | ||
904 | // If INSN is an opcode that may be used with an @tls operand, return | |
905 | // the transformed insn for TLS optimisation, otherwise return 0. If | |
906 | // REG is non-zero only match an insn with RB or RA equal to REG. | |
907 | uint32_t | |
908 | at_tls_transform(uint32_t insn, unsigned int reg) | |
909 | { | |
910 | if ((insn & (0x3f << 26)) != 31 << 26) | |
911 | return 0; | |
912 | ||
913 | unsigned int rtra; | |
914 | if (reg == 0 || ((insn >> 11) & 0x1f) == reg) | |
915 | rtra = insn & ((1 << 26) - (1 << 16)); | |
916 | else if (((insn >> 16) & 0x1f) == reg) | |
917 | rtra = (insn & (0x1f << 21)) | ((insn & (0x1f << 11)) << 5); | |
918 | else | |
919 | return 0; | |
920 | ||
921 | if ((insn & (0x3ff << 1)) == 266 << 1) | |
922 | // add -> addi | |
923 | insn = 14 << 26; | |
924 | else if ((insn & (0x1f << 1)) == 23 << 1 | |
925 | && ((insn & (0x1f << 6)) < 14 << 6 | |
926 | || ((insn & (0x1f << 6)) >= 16 << 6 | |
927 | && (insn & (0x1f << 6)) < 24 << 6))) | |
928 | // load and store indexed -> dform | |
929 | insn = (32 | ((insn >> 6) & 0x1f)) << 26; | |
930 | else if ((insn & (((0x1a << 5) | 0x1f) << 1)) == 21 << 1) | |
931 | // ldx, ldux, stdx, stdux -> ld, ldu, std, stdu | |
932 | insn = ((58 | ((insn >> 6) & 4)) << 26) | ((insn >> 6) & 1); | |
933 | else if ((insn & (((0x1f << 5) | 0x1f) << 1)) == 341 << 1) | |
934 | // lwax -> lwa | |
935 | insn = (58 << 26) | 2; | |
936 | else | |
937 | return 0; | |
938 | insn |= rtra; | |
939 | return insn; | |
940 | } | |
941 | ||
942 | // Modified version of symtab.h class Symbol member | |
943 | // Given a direct absolute or pc-relative static relocation against | |
944 | // the global symbol, this function returns whether a dynamic relocation | |
945 | // is needed. | |
946 | ||
947 | template<int size> | |
948 | bool | |
949 | needs_dynamic_reloc(const Symbol* gsym, int flags) | |
950 | { | |
951 | // No dynamic relocations in a static link! | |
952 | if (parameters->doing_static_link()) | |
953 | return false; | |
954 | ||
955 | // A reference to an undefined symbol from an executable should be | |
956 | // statically resolved to 0, and does not need a dynamic relocation. | |
957 | // This matches gnu ld behavior. | |
958 | if (gsym->is_undefined() && !parameters->options().shared()) | |
959 | return false; | |
960 | ||
961 | // A reference to an absolute symbol does not need a dynamic relocation. | |
962 | if (gsym->is_absolute()) | |
963 | return false; | |
964 | ||
965 | // An absolute reference within a position-independent output file | |
966 | // will need a dynamic relocation. | |
967 | if ((flags & Symbol::ABSOLUTE_REF) | |
968 | && parameters->options().output_is_position_independent()) | |
969 | return true; | |
970 | ||
971 | // A function call that can branch to a local PLT entry does not need | |
972 | // a dynamic relocation. | |
973 | if ((flags & Symbol::FUNCTION_CALL) && gsym->has_plt_offset()) | |
974 | return false; | |
975 | ||
976 | // A reference to any PLT entry in a non-position-independent executable | |
977 | // does not need a dynamic relocation. | |
978 | // Except due to having function descriptors on powerpc64 we don't define | |
979 | // functions to their plt code in an executable, so this doesn't apply. | |
980 | if (size == 32 | |
981 | && !parameters->options().output_is_position_independent() | |
982 | && gsym->has_plt_offset()) | |
983 | return false; | |
984 | ||
985 | // A reference to a symbol defined in a dynamic object or to a | |
986 | // symbol that is preemptible will need a dynamic relocation. | |
987 | if (gsym->is_from_dynobj() | |
988 | || gsym->is_undefined() | |
989 | || gsym->is_preemptible()) | |
990 | return true; | |
991 | ||
992 | // For all other cases, return FALSE. | |
993 | return false; | |
994 | } | |
995 | ||
996 | // Modified version of symtab.h class Symbol member | |
997 | // Whether we should use the PLT offset associated with a symbol for | |
998 | // a relocation. FLAGS is a set of Reference_flags. | |
999 | ||
1000 | template<int size> | |
1001 | bool | |
1002 | use_plt_offset(const Symbol* gsym, int flags) | |
1003 | { | |
1004 | // If the symbol doesn't have a PLT offset, then naturally we | |
1005 | // don't want to use it. | |
1006 | if (!gsym->has_plt_offset()) | |
1007 | return false; | |
1008 | ||
1009 | // For a STT_GNU_IFUNC symbol we always have to use the PLT entry. | |
1010 | if (gsym->type() == elfcpp::STT_GNU_IFUNC) | |
1011 | return true; | |
1012 | ||
1013 | // If we are going to generate a dynamic relocation, then we will | |
1014 | // wind up using that, so no need to use the PLT entry. | |
1015 | if (needs_dynamic_reloc<size>(gsym, flags)) | |
1016 | return false; | |
1017 | ||
1018 | // If the symbol is from a dynamic object, we need to use the PLT | |
1019 | // entry. | |
1020 | if (gsym->is_from_dynobj()) | |
1021 | return true; | |
1022 | ||
1023 | // If we are generating a shared object, and gsym symbol is | |
1024 | // undefined or preemptible, we need to use the PLT entry. | |
1025 | if (parameters->options().shared() | |
1026 | && (gsym->is_undefined() || gsym->is_preemptible())) | |
1027 | return true; | |
1028 | ||
1029 | // If gsym is a call to a weak undefined symbol, we need to use | |
1030 | // the PLT entry; the symbol may be defined by a library loaded | |
1031 | // at runtime. | |
1032 | if ((flags & Symbol::FUNCTION_CALL) && gsym->is_weak_undefined()) | |
1033 | return true; | |
1034 | ||
1035 | // Otherwise we can use the regular definition. | |
1036 | return false; | |
1037 | } | |
1038 | ||
42cacb20 DE |
1039 | template<int size, bool big_endian> |
1040 | class Powerpc_relocate_functions | |
1041 | { | |
dd93cd0a | 1042 | public: |
f4baf0d4 | 1043 | enum Overflow_check |
dd93cd0a | 1044 | { |
f4baf0d4 AM |
1045 | CHECK_NONE, |
1046 | CHECK_SIGNED, | |
1047 | CHECK_BITFIELD | |
dd93cd0a AM |
1048 | }; |
1049 | ||
f4baf0d4 | 1050 | enum Status |
dd93cd0a | 1051 | { |
f4baf0d4 AM |
1052 | STATUS_OK, |
1053 | STATUS_OVERFLOW | |
1054 | }; | |
dd93cd0a | 1055 | |
42cacb20 | 1056 | private: |
c9269dff | 1057 | typedef Powerpc_relocate_functions<size, big_endian> This; |
c9269dff AM |
1058 | typedef typename elfcpp::Elf_types<size>::Elf_Addr Address; |
1059 | ||
dd93cd0a AM |
1060 | template<int valsize> |
1061 | static inline bool | |
1062 | has_overflow_signed(Address value) | |
1063 | { | |
1064 | // limit = 1 << (valsize - 1) without shift count exceeding size of type | |
1065 | Address limit = static_cast<Address>(1) << ((valsize - 1) >> 1); | |
1066 | limit <<= ((valsize - 1) >> 1); | |
1067 | limit <<= ((valsize - 1) - 2 * ((valsize - 1) >> 1)); | |
1068 | return value + limit > (limit << 1) - 1; | |
1069 | } | |
1070 | ||
1071 | template<int valsize> | |
1072 | static inline bool | |
1073 | has_overflow_bitfield(Address value) | |
1074 | { | |
1075 | Address limit = static_cast<Address>(1) << ((valsize - 1) >> 1); | |
1076 | limit <<= ((valsize - 1) >> 1); | |
1077 | limit <<= ((valsize - 1) - 2 * ((valsize - 1) >> 1)); | |
1078 | return value > (limit << 1) - 1 && value + limit > (limit << 1) - 1; | |
1079 | } | |
1080 | ||
1081 | template<int valsize> | |
f4baf0d4 AM |
1082 | static inline Status |
1083 | overflowed(Address value, Overflow_check overflow) | |
dd93cd0a | 1084 | { |
f4baf0d4 | 1085 | if (overflow == CHECK_SIGNED) |
dd93cd0a AM |
1086 | { |
1087 | if (has_overflow_signed<valsize>(value)) | |
f4baf0d4 | 1088 | return STATUS_OVERFLOW; |
dd93cd0a | 1089 | } |
f4baf0d4 | 1090 | else if (overflow == CHECK_BITFIELD) |
dd93cd0a AM |
1091 | { |
1092 | if (has_overflow_bitfield<valsize>(value)) | |
f4baf0d4 | 1093 | return STATUS_OVERFLOW; |
dd93cd0a | 1094 | } |
f4baf0d4 | 1095 | return STATUS_OK; |
dd93cd0a AM |
1096 | } |
1097 | ||
cf43a2fe | 1098 | // Do a simple RELA relocation |
42cacb20 | 1099 | template<int valsize> |
f4baf0d4 AM |
1100 | static inline Status |
1101 | rela(unsigned char* view, Address value, Overflow_check overflow) | |
dd93cd0a AM |
1102 | { |
1103 | typedef typename elfcpp::Swap<valsize, big_endian>::Valtype Valtype; | |
1104 | Valtype* wv = reinterpret_cast<Valtype*>(view); | |
1105 | elfcpp::Swap<valsize, big_endian>::writeval(wv, value); | |
1106 | return overflowed<valsize>(value, overflow); | |
1107 | } | |
1108 | ||
1109 | template<int valsize> | |
f4baf0d4 | 1110 | static inline Status |
42cacb20 DE |
1111 | rela(unsigned char* view, |
1112 | unsigned int right_shift, | |
c9269dff AM |
1113 | typename elfcpp::Valtype_base<valsize>::Valtype dst_mask, |
1114 | Address value, | |
f4baf0d4 | 1115 | Overflow_check overflow) |
42cacb20 DE |
1116 | { |
1117 | typedef typename elfcpp::Swap<valsize, big_endian>::Valtype Valtype; | |
1118 | Valtype* wv = reinterpret_cast<Valtype*>(view); | |
1119 | Valtype val = elfcpp::Swap<valsize, big_endian>::readval(wv); | |
dd93cd0a | 1120 | Valtype reloc = value >> right_shift; |
42cacb20 DE |
1121 | val &= ~dst_mask; |
1122 | reloc &= dst_mask; | |
42cacb20 | 1123 | elfcpp::Swap<valsize, big_endian>::writeval(wv, val | reloc); |
dd93cd0a | 1124 | return overflowed<valsize>(value >> right_shift, overflow); |
42cacb20 DE |
1125 | } |
1126 | ||
cf43a2fe | 1127 | // Do a simple RELA relocation, unaligned. |
42cacb20 | 1128 | template<int valsize> |
f4baf0d4 AM |
1129 | static inline Status |
1130 | rela_ua(unsigned char* view, Address value, Overflow_check overflow) | |
dd93cd0a AM |
1131 | { |
1132 | elfcpp::Swap_unaligned<valsize, big_endian>::writeval(view, value); | |
1133 | return overflowed<valsize>(value, overflow); | |
1134 | } | |
1135 | ||
1136 | template<int valsize> | |
f4baf0d4 | 1137 | static inline Status |
cf43a2fe AM |
1138 | rela_ua(unsigned char* view, |
1139 | unsigned int right_shift, | |
c9269dff AM |
1140 | typename elfcpp::Valtype_base<valsize>::Valtype dst_mask, |
1141 | Address value, | |
f4baf0d4 | 1142 | Overflow_check overflow) |
42cacb20 | 1143 | { |
c9269dff AM |
1144 | typedef typename elfcpp::Swap_unaligned<valsize, big_endian>::Valtype |
1145 | Valtype; | |
dd93cd0a AM |
1146 | Valtype val = elfcpp::Swap<valsize, big_endian>::readval(view); |
1147 | Valtype reloc = value >> right_shift; | |
42cacb20 DE |
1148 | val &= ~dst_mask; |
1149 | reloc &= dst_mask; | |
dd93cd0a AM |
1150 | elfcpp::Swap_unaligned<valsize, big_endian>::writeval(view, val | reloc); |
1151 | return overflowed<valsize>(value >> right_shift, overflow); | |
42cacb20 DE |
1152 | } |
1153 | ||
42cacb20 | 1154 | public: |
dd93cd0a | 1155 | // R_PPC64_ADDR64: (Symbol + Addend) |
42cacb20 | 1156 | static inline void |
dd93cd0a | 1157 | addr64(unsigned char* view, Address value) |
f4baf0d4 | 1158 | { This::template rela<64>(view, value, CHECK_NONE); } |
42cacb20 | 1159 | |
dd93cd0a | 1160 | // R_PPC64_UADDR64: (Symbol + Addend) unaligned |
42cacb20 | 1161 | static inline void |
dd93cd0a | 1162 | addr64_u(unsigned char* view, Address value) |
f4baf0d4 | 1163 | { This::template rela_ua<64>(view, value, CHECK_NONE); } |
dd93cd0a AM |
1164 | |
1165 | // R_POWERPC_ADDR32: (Symbol + Addend) | |
f4baf0d4 AM |
1166 | static inline Status |
1167 | addr32(unsigned char* view, Address value, Overflow_check overflow) | |
dd93cd0a AM |
1168 | { return This::template rela<32>(view, value, overflow); } |
1169 | ||
1170 | // R_POWERPC_UADDR32: (Symbol + Addend) unaligned | |
f4baf0d4 AM |
1171 | static inline Status |
1172 | addr32_u(unsigned char* view, Address value, Overflow_check overflow) | |
dd93cd0a AM |
1173 | { return This::template rela_ua<32>(view, value, overflow); } |
1174 | ||
1175 | // R_POWERPC_ADDR24: (Symbol + Addend) & 0x3fffffc | |
f4baf0d4 AM |
1176 | static inline Status |
1177 | addr24(unsigned char* view, Address value, Overflow_check overflow) | |
dd93cd0a | 1178 | { |
f4baf0d4 AM |
1179 | Status stat = This::template rela<32>(view, 0, 0x03fffffc, value, overflow); |
1180 | if (overflow != CHECK_NONE && (value & 3) != 0) | |
1181 | stat = STATUS_OVERFLOW; | |
dd93cd0a AM |
1182 | return stat; |
1183 | } | |
42cacb20 DE |
1184 | |
1185 | // R_POWERPC_ADDR16: (Symbol + Addend) & 0xffff | |
f4baf0d4 AM |
1186 | static inline Status |
1187 | addr16(unsigned char* view, Address value, Overflow_check overflow) | |
dd93cd0a | 1188 | { return This::template rela<16>(view, value, overflow); } |
42cacb20 | 1189 | |
dd93cd0a | 1190 | // R_POWERPC_ADDR16: (Symbol + Addend) & 0xffff, unaligned |
f4baf0d4 AM |
1191 | static inline Status |
1192 | addr16_u(unsigned char* view, Address value, Overflow_check overflow) | |
dd93cd0a | 1193 | { return This::template rela_ua<16>(view, value, overflow); } |
42cacb20 | 1194 | |
dd93cd0a | 1195 | // R_POWERPC_ADDR16_DS: (Symbol + Addend) & 0xfffc |
f4baf0d4 AM |
1196 | static inline Status |
1197 | addr16_ds(unsigned char* view, Address value, Overflow_check overflow) | |
dd93cd0a | 1198 | { |
f4baf0d4 AM |
1199 | Status stat = This::template rela<16>(view, 0, 0xfffc, value, overflow); |
1200 | if (overflow != CHECK_NONE && (value & 3) != 0) | |
1201 | stat = STATUS_OVERFLOW; | |
dd93cd0a AM |
1202 | return stat; |
1203 | } | |
42cacb20 | 1204 | |
42cacb20 DE |
1205 | // R_POWERPC_ADDR16_HI: ((Symbol + Addend) >> 16) & 0xffff |
1206 | static inline void | |
dd93cd0a | 1207 | addr16_hi(unsigned char* view, Address value) |
f4baf0d4 | 1208 | { This::template rela<16>(view, 16, 0xffff, value, CHECK_NONE); } |
42cacb20 | 1209 | |
c9269dff | 1210 | // R_POWERPC_ADDR16_HA: ((Symbol + Addend + 0x8000) >> 16) & 0xffff |
42cacb20 | 1211 | static inline void |
dd93cd0a AM |
1212 | addr16_ha(unsigned char* view, Address value) |
1213 | { This::addr16_hi(view, value + 0x8000); } | |
42cacb20 | 1214 | |
dd93cd0a | 1215 | // R_POWERPC_ADDR16_HIGHER: ((Symbol + Addend) >> 32) & 0xffff |
42cacb20 | 1216 | static inline void |
dd93cd0a | 1217 | addr16_hi2(unsigned char* view, Address value) |
f4baf0d4 | 1218 | { This::template rela<16>(view, 32, 0xffff, value, CHECK_NONE); } |
42cacb20 | 1219 | |
dd93cd0a | 1220 | // R_POWERPC_ADDR16_HIGHERA: ((Symbol + Addend + 0x8000) >> 32) & 0xffff |
42cacb20 | 1221 | static inline void |
dd93cd0a AM |
1222 | addr16_ha2(unsigned char* view, Address value) |
1223 | { This::addr16_hi2(view, value + 0x8000); } | |
42cacb20 | 1224 | |
dd93cd0a | 1225 | // R_POWERPC_ADDR16_HIGHEST: ((Symbol + Addend) >> 48) & 0xffff |
42cacb20 | 1226 | static inline void |
dd93cd0a | 1227 | addr16_hi3(unsigned char* view, Address value) |
f4baf0d4 | 1228 | { This::template rela<16>(view, 48, 0xffff, value, CHECK_NONE); } |
42cacb20 | 1229 | |
dd93cd0a | 1230 | // R_POWERPC_ADDR16_HIGHESTA: ((Symbol + Addend + 0x8000) >> 48) & 0xffff |
42cacb20 | 1231 | static inline void |
dd93cd0a AM |
1232 | addr16_ha3(unsigned char* view, Address value) |
1233 | { This::addr16_hi3(view, value + 0x8000); } | |
1234 | ||
1235 | // R_POWERPC_ADDR14: (Symbol + Addend) & 0xfffc | |
f4baf0d4 AM |
1236 | static inline Status |
1237 | addr14(unsigned char* view, Address value, Overflow_check overflow) | |
dd93cd0a | 1238 | { |
f4baf0d4 AM |
1239 | Status stat = This::template rela<32>(view, 0, 0xfffc, value, overflow); |
1240 | if (overflow != CHECK_NONE && (value & 3) != 0) | |
1241 | stat = STATUS_OVERFLOW; | |
dd93cd0a AM |
1242 | return stat; |
1243 | } | |
cf43a2fe AM |
1244 | }; |
1245 | ||
c9269dff AM |
1246 | // Stash away the index of .got2 or .opd in a relocatable object, if |
1247 | // such a section exists. | |
cf43a2fe AM |
1248 | |
1249 | template<int size, bool big_endian> | |
1250 | bool | |
1251 | Powerpc_relobj<size, big_endian>::do_find_special_sections( | |
1252 | Read_symbols_data* sd) | |
1253 | { | |
c9269dff AM |
1254 | const unsigned char* const pshdrs = sd->section_headers->data(); |
1255 | const unsigned char* namesu = sd->section_names->data(); | |
1256 | const char* names = reinterpret_cast<const char*>(namesu); | |
1257 | section_size_type names_size = sd->section_names_size; | |
1258 | const unsigned char* s; | |
1259 | ||
1260 | s = this->find_shdr(pshdrs, size == 32 ? ".got2" : ".opd", | |
1261 | names, names_size, NULL); | |
1262 | if (s != NULL) | |
1263 | { | |
1264 | unsigned int ndx = (s - pshdrs) / elfcpp::Elf_sizes<size>::shdr_size; | |
1265 | this->special_ = ndx; | |
1266 | } | |
1267 | return Sized_relobj_file<size, big_endian>::do_find_special_sections(sd); | |
1268 | } | |
1269 | ||
1270 | // Examine .rela.opd to build info about function entry points. | |
1271 | ||
1272 | template<int size, bool big_endian> | |
1273 | void | |
1274 | Powerpc_relobj<size, big_endian>::scan_opd_relocs( | |
1275 | size_t reloc_count, | |
1276 | const unsigned char* prelocs, | |
1277 | const unsigned char* plocal_syms) | |
1278 | { | |
1279 | if (size == 64) | |
cf43a2fe | 1280 | { |
c9269dff AM |
1281 | typedef typename Reloc_types<elfcpp::SHT_RELA, size, big_endian>::Reloc |
1282 | Reltype; | |
1283 | const int reloc_size | |
1284 | = Reloc_types<elfcpp::SHT_RELA, size, big_endian>::reloc_size; | |
1285 | const int sym_size = elfcpp::Elf_sizes<size>::sym_size; | |
ec4dbad3 AM |
1286 | Address expected_off = 0; |
1287 | bool regular = true; | |
1288 | unsigned int opd_ent_size = 0; | |
c9269dff AM |
1289 | |
1290 | for (size_t i = 0; i < reloc_count; ++i, prelocs += reloc_size) | |
cf43a2fe | 1291 | { |
c9269dff AM |
1292 | Reltype reloc(prelocs); |
1293 | typename elfcpp::Elf_types<size>::Elf_WXword r_info | |
1294 | = reloc.get_r_info(); | |
1295 | unsigned int r_type = elfcpp::elf_r_type<size>(r_info); | |
1296 | if (r_type == elfcpp::R_PPC64_ADDR64) | |
1297 | { | |
1298 | unsigned int r_sym = elfcpp::elf_r_sym<size>(r_info); | |
1299 | typename elfcpp::Elf_types<size>::Elf_Addr value; | |
1300 | bool is_ordinary; | |
1301 | unsigned int shndx; | |
1302 | if (r_sym < this->local_symbol_count()) | |
1303 | { | |
1304 | typename elfcpp::Sym<size, big_endian> | |
1305 | lsym(plocal_syms + r_sym * sym_size); | |
1306 | shndx = lsym.get_st_shndx(); | |
1307 | shndx = this->adjust_sym_shndx(r_sym, shndx, &is_ordinary); | |
1308 | value = lsym.get_st_value(); | |
1309 | } | |
1310 | else | |
1311 | shndx = this->symbol_section_and_value(r_sym, &value, | |
1312 | &is_ordinary); | |
1313 | this->set_opd_ent(reloc.get_r_offset(), shndx, | |
1314 | value + reloc.get_r_addend()); | |
ec4dbad3 AM |
1315 | if (i == 2) |
1316 | { | |
1317 | expected_off = reloc.get_r_offset(); | |
1318 | opd_ent_size = expected_off; | |
1319 | } | |
1320 | else if (expected_off != reloc.get_r_offset()) | |
1321 | regular = false; | |
1322 | expected_off += opd_ent_size; | |
1323 | } | |
1324 | else if (r_type == elfcpp::R_PPC64_TOC) | |
1325 | { | |
1326 | if (expected_off - opd_ent_size + 8 != reloc.get_r_offset()) | |
1327 | regular = false; | |
1328 | } | |
1329 | else | |
1330 | { | |
1331 | gold_warning(_("%s: unexpected reloc type %u in .opd section"), | |
1332 | this->name().c_str(), r_type); | |
1333 | regular = false; | |
c9269dff AM |
1334 | } |
1335 | } | |
ec4dbad3 AM |
1336 | if (reloc_count <= 2) |
1337 | opd_ent_size = this->section_size(this->opd_shndx()); | |
1338 | if (opd_ent_size != 24 && opd_ent_size != 16) | |
1339 | regular = false; | |
1340 | if (!regular) | |
1341 | { | |
1342 | gold_warning(_("%s: .opd is not a regular array of opd entries"), | |
1343 | this->name().c_str()); | |
1344 | opd_ent_size = 0; | |
1345 | } | |
c9269dff AM |
1346 | } |
1347 | } | |
1348 | ||
1349 | template<int size, bool big_endian> | |
1350 | void | |
1351 | Powerpc_relobj<size, big_endian>::do_read_relocs(Read_relocs_data* rd) | |
1352 | { | |
1353 | Sized_relobj_file<size, big_endian>::do_read_relocs(rd); | |
1354 | if (size == 64) | |
1355 | { | |
1356 | for (Read_relocs_data::Relocs_list::iterator p = rd->relocs.begin(); | |
1357 | p != rd->relocs.end(); | |
1358 | ++p) | |
1359 | { | |
1360 | if (p->data_shndx == this->opd_shndx()) | |
1361 | { | |
ec4dbad3 AM |
1362 | uint64_t opd_size = this->section_size(this->opd_shndx()); |
1363 | gold_assert(opd_size == static_cast<size_t>(opd_size)); | |
1364 | if (opd_size != 0) | |
1365 | { | |
1366 | this->init_opd(opd_size); | |
1367 | this->scan_opd_relocs(p->reloc_count, p->contents->data(), | |
1368 | rd->local_symbols->data()); | |
1369 | } | |
c9269dff AM |
1370 | break; |
1371 | } | |
cf43a2fe AM |
1372 | } |
1373 | } | |
cf43a2fe AM |
1374 | } |
1375 | ||
1376 | // Set up PowerPC target specific relobj. | |
1377 | ||
1378 | template<int size, bool big_endian> | |
1379 | Object* | |
1380 | Target_powerpc<size, big_endian>::do_make_elf_object( | |
1381 | const std::string& name, | |
1382 | Input_file* input_file, | |
1383 | off_t offset, const elfcpp::Ehdr<size, big_endian>& ehdr) | |
1384 | { | |
1385 | int et = ehdr.get_e_type(); | |
957564c9 AS |
1386 | // ET_EXEC files are valid input for --just-symbols/-R, |
1387 | // and we treat them as relocatable objects. | |
1388 | if (et == elfcpp::ET_REL | |
1389 | || (et == elfcpp::ET_EXEC && input_file->just_symbols())) | |
cf43a2fe AM |
1390 | { |
1391 | Powerpc_relobj<size, big_endian>* obj = | |
c9269dff | 1392 | new Powerpc_relobj<size, big_endian>(name, input_file, offset, ehdr); |
cf43a2fe AM |
1393 | obj->setup(); |
1394 | return obj; | |
1395 | } | |
1396 | else if (et == elfcpp::ET_DYN) | |
1397 | { | |
1398 | Sized_dynobj<size, big_endian>* obj = | |
c9269dff | 1399 | new Sized_dynobj<size, big_endian>(name, input_file, offset, ehdr); |
cf43a2fe AM |
1400 | obj->setup(); |
1401 | return obj; | |
1402 | } | |
1403 | else | |
1404 | { | |
c9269dff | 1405 | gold_error(_("%s: unsupported ELF file type %d"), name.c_str(), et); |
cf43a2fe AM |
1406 | return NULL; |
1407 | } | |
1408 | } | |
1409 | ||
1410 | template<int size, bool big_endian> | |
1411 | class Output_data_got_powerpc : public Output_data_got<size, big_endian> | |
1412 | { | |
1413 | public: | |
1414 | typedef typename elfcpp::Elf_types<size>::Elf_Addr Valtype; | |
1415 | typedef Output_data_reloc<elfcpp::SHT_RELA, true, size, big_endian> Rela_dyn; | |
1416 | ||
1417 | Output_data_got_powerpc(Symbol_table* symtab, Layout* layout) | |
1418 | : Output_data_got<size, big_endian>(), | |
1419 | symtab_(symtab), layout_(layout), | |
1420 | header_ent_cnt_(size == 32 ? 3 : 1), | |
1421 | header_index_(size == 32 ? 0x2000 : 0) | |
1422 | {} | |
1423 | ||
1424 | class Got_entry; | |
1425 | ||
1426 | // Create a new GOT entry and return its offset. | |
1427 | unsigned int | |
1428 | add_got_entry(Got_entry got_entry) | |
42cacb20 | 1429 | { |
cf43a2fe AM |
1430 | this->reserve_ent(); |
1431 | return Output_data_got<size, big_endian>::add_got_entry(got_entry); | |
1432 | } | |
42cacb20 | 1433 | |
cf43a2fe AM |
1434 | // Create a pair of new GOT entries and return the offset of the first. |
1435 | unsigned int | |
1436 | add_got_entry_pair(Got_entry got_entry_1, Got_entry got_entry_2) | |
1437 | { | |
1438 | this->reserve_ent(2); | |
1439 | return Output_data_got<size, big_endian>::add_got_entry_pair(got_entry_1, | |
1440 | got_entry_2); | |
1441 | } | |
42cacb20 | 1442 | |
dd93cd0a AM |
1443 | unsigned int |
1444 | add_constant_pair(Valtype c1, Valtype c2) | |
1445 | { | |
1446 | this->reserve_ent(2); | |
1447 | unsigned int got_offset = this->add_constant(c1); | |
1448 | this->add_constant(c2); | |
1449 | return got_offset; | |
1450 | } | |
1451 | ||
1452 | // Offset of _GLOBAL_OFFSET_TABLE_. | |
cf43a2fe AM |
1453 | unsigned int |
1454 | g_o_t() const | |
1455 | { | |
1456 | return this->got_offset(this->header_index_); | |
42cacb20 | 1457 | } |
cf43a2fe | 1458 | |
dd93cd0a AM |
1459 | // Offset of base used to access the GOT/TOC. |
1460 | // The got/toc pointer reg will be set to this value. | |
1461 | typename elfcpp::Elf_types<size>::Elf_Off | |
1462 | got_base_offset(const Powerpc_relobj<size, big_endian>* object) const | |
1463 | { | |
1464 | if (size == 32) | |
1465 | return this->g_o_t(); | |
1466 | else | |
1467 | return (this->output_section()->address() | |
1468 | + object->toc_base_offset() | |
1469 | - this->address()); | |
1470 | } | |
1471 | ||
cf43a2fe AM |
1472 | // Ensure our GOT has a header. |
1473 | void | |
1474 | set_final_data_size() | |
1475 | { | |
1476 | if (this->header_ent_cnt_ != 0) | |
1477 | this->make_header(); | |
1478 | Output_data_got<size, big_endian>::set_final_data_size(); | |
1479 | } | |
1480 | ||
1481 | // First word of GOT header needs some values that are not | |
1482 | // handled by Output_data_got so poke them in here. | |
1483 | // For 32-bit, address of .dynamic, for 64-bit, address of TOCbase. | |
1484 | void | |
1485 | do_write(Output_file* of) | |
1486 | { | |
c9824451 AM |
1487 | Valtype val = 0; |
1488 | if (size == 32 && this->layout_->dynamic_data() != NULL) | |
1489 | val = this->layout_->dynamic_section()->address(); | |
1490 | if (size == 64) | |
1491 | val = this->output_section()->address() + 0x8000; | |
1492 | this->replace_constant(this->header_index_, val); | |
cf43a2fe AM |
1493 | Output_data_got<size, big_endian>::do_write(of); |
1494 | } | |
1495 | ||
1496 | private: | |
1497 | void | |
1498 | reserve_ent(unsigned int cnt = 1) | |
1499 | { | |
1500 | if (this->header_ent_cnt_ == 0) | |
1501 | return; | |
1502 | if (this->num_entries() + cnt > this->header_index_) | |
1503 | this->make_header(); | |
1504 | } | |
1505 | ||
1506 | void | |
1507 | make_header() | |
1508 | { | |
1509 | this->header_ent_cnt_ = 0; | |
1510 | this->header_index_ = this->num_entries(); | |
1511 | if (size == 32) | |
1512 | { | |
1513 | Output_data_got<size, big_endian>::add_constant(0); | |
1514 | Output_data_got<size, big_endian>::add_constant(0); | |
1515 | Output_data_got<size, big_endian>::add_constant(0); | |
1516 | ||
1517 | // Define _GLOBAL_OFFSET_TABLE_ at the header | |
1518 | this->symtab_->define_in_output_data("_GLOBAL_OFFSET_TABLE_", NULL, | |
1519 | Symbol_table::PREDEFINED, | |
1520 | this, this->g_o_t(), 0, | |
1521 | elfcpp::STT_OBJECT, | |
1522 | elfcpp::STB_LOCAL, | |
1523 | elfcpp::STV_HIDDEN, | |
1524 | 0, false, false); | |
1525 | } | |
1526 | else | |
1527 | Output_data_got<size, big_endian>::add_constant(0); | |
1528 | } | |
1529 | ||
1530 | // Stashed pointers. | |
1531 | Symbol_table* symtab_; | |
1532 | Layout* layout_; | |
1533 | ||
1534 | // GOT header size. | |
1535 | unsigned int header_ent_cnt_; | |
1536 | // GOT header index. | |
1537 | unsigned int header_index_; | |
42cacb20 DE |
1538 | }; |
1539 | ||
1540 | // Get the GOT section, creating it if necessary. | |
1541 | ||
1542 | template<int size, bool big_endian> | |
cf43a2fe | 1543 | Output_data_got_powerpc<size, big_endian>* |
42cacb20 DE |
1544 | Target_powerpc<size, big_endian>::got_section(Symbol_table* symtab, |
1545 | Layout* layout) | |
1546 | { | |
1547 | if (this->got_ == NULL) | |
1548 | { | |
1549 | gold_assert(symtab != NULL && layout != NULL); | |
1550 | ||
cf43a2fe AM |
1551 | this->got_ |
1552 | = new Output_data_got_powerpc<size, big_endian>(symtab, layout); | |
42cacb20 DE |
1553 | |
1554 | layout->add_output_section_data(".got", elfcpp::SHT_PROGBITS, | |
1555 | elfcpp::SHF_ALLOC | elfcpp::SHF_WRITE, | |
22f0da72 | 1556 | this->got_, ORDER_DATA, false); |
42cacb20 DE |
1557 | } |
1558 | ||
1559 | return this->got_; | |
1560 | } | |
1561 | ||
1562 | // Get the dynamic reloc section, creating it if necessary. | |
1563 | ||
1564 | template<int size, bool big_endian> | |
1565 | typename Target_powerpc<size, big_endian>::Reloc_section* | |
1566 | Target_powerpc<size, big_endian>::rela_dyn_section(Layout* layout) | |
1567 | { | |
1568 | if (this->rela_dyn_ == NULL) | |
1569 | { | |
1570 | gold_assert(layout != NULL); | |
1571 | this->rela_dyn_ = new Reloc_section(parameters->options().combreloc()); | |
1572 | layout->add_output_section_data(".rela.dyn", elfcpp::SHT_RELA, | |
22f0da72 ILT |
1573 | elfcpp::SHF_ALLOC, this->rela_dyn_, |
1574 | ORDER_DYNAMIC_RELOCS, false); | |
42cacb20 DE |
1575 | } |
1576 | return this->rela_dyn_; | |
1577 | } | |
1578 | ||
1579 | // A class to handle the PLT data. | |
1580 | ||
1581 | template<int size, bool big_endian> | |
cf43a2fe | 1582 | class Output_data_plt_powerpc : public Output_section_data_build |
42cacb20 DE |
1583 | { |
1584 | public: | |
1585 | typedef Output_data_reloc<elfcpp::SHT_RELA, true, | |
1586 | size, big_endian> Reloc_section; | |
1587 | ||
e5d5f5ed AM |
1588 | Output_data_plt_powerpc(Target_powerpc<size, big_endian>* targ, |
1589 | Reloc_section* plt_rel, | |
1590 | unsigned int reserved_size, | |
1591 | const char* name) | |
1592 | : Output_section_data_build(size == 32 ? 4 : 8), | |
1593 | rel_(plt_rel), | |
1594 | targ_(targ), | |
1595 | initial_plt_entry_size_(reserved_size), | |
1596 | name_(name) | |
1597 | { } | |
42cacb20 DE |
1598 | |
1599 | // Add an entry to the PLT. | |
03e25981 | 1600 | void |
cf43a2fe | 1601 | add_entry(Symbol*); |
42cacb20 | 1602 | |
03e25981 | 1603 | void |
e5d5f5ed AM |
1604 | add_ifunc_entry(Symbol*); |
1605 | ||
03e25981 | 1606 | void |
e5d5f5ed AM |
1607 | add_local_ifunc_entry(Sized_relobj_file<size, big_endian>*, unsigned int); |
1608 | ||
42cacb20 | 1609 | // Return the .rela.plt section data. |
e5d5f5ed | 1610 | Reloc_section* |
cf43a2fe AM |
1611 | rel_plt() const |
1612 | { | |
42cacb20 DE |
1613 | return this->rel_; |
1614 | } | |
1615 | ||
0e70b911 CC |
1616 | // Return the number of PLT entries. |
1617 | unsigned int | |
1618 | entry_count() const | |
d83ce4e3 | 1619 | { |
e5d5f5ed | 1620 | return ((this->current_data_size() - this->initial_plt_entry_size_) |
d83ce4e3 AM |
1621 | / plt_entry_size); |
1622 | } | |
0e70b911 CC |
1623 | |
1624 | // Return the offset of the first non-reserved PLT entry. | |
e5d5f5ed | 1625 | unsigned int |
0e70b911 | 1626 | first_plt_entry_offset() |
e5d5f5ed | 1627 | { return this->initial_plt_entry_size_; } |
0e70b911 CC |
1628 | |
1629 | // Return the size of a PLT entry. | |
1630 | static unsigned int | |
1631 | get_plt_entry_size() | |
cf43a2fe | 1632 | { return plt_entry_size; } |
0e70b911 | 1633 | |
42cacb20 | 1634 | protected: |
42cacb20 | 1635 | void |
cf43a2fe | 1636 | do_adjust_output_section(Output_section* os) |
42cacb20 | 1637 | { |
cf43a2fe | 1638 | os->set_entsize(0); |
42cacb20 DE |
1639 | } |
1640 | ||
6ce78956 AM |
1641 | // Write to a map file. |
1642 | void | |
1643 | do_print_to_mapfile(Mapfile* mapfile) const | |
e5d5f5ed | 1644 | { mapfile->print_output_data(this, this->name_); } |
6ce78956 | 1645 | |
cf43a2fe AM |
1646 | private: |
1647 | // The size of an entry in the PLT. | |
1648 | static const int plt_entry_size = size == 32 ? 4 : 24; | |
cf43a2fe | 1649 | |
42cacb20 DE |
1650 | // Write out the PLT data. |
1651 | void | |
1652 | do_write(Output_file*); | |
1653 | ||
1654 | // The reloc section. | |
1655 | Reloc_section* rel_; | |
cf43a2fe AM |
1656 | // Allows access to .glink for do_write. |
1657 | Target_powerpc<size, big_endian>* targ_; | |
e5d5f5ed AM |
1658 | // The size of the first reserved entry. |
1659 | int initial_plt_entry_size_; | |
1660 | // What to report in map file. | |
1661 | const char *name_; | |
42cacb20 DE |
1662 | }; |
1663 | ||
e5d5f5ed | 1664 | // Add an entry to the PLT. |
42cacb20 DE |
1665 | |
1666 | template<int size, bool big_endian> | |
03e25981 | 1667 | void |
e5d5f5ed | 1668 | Output_data_plt_powerpc<size, big_endian>::add_entry(Symbol* gsym) |
42cacb20 | 1669 | { |
e5d5f5ed AM |
1670 | if (!gsym->has_plt_offset()) |
1671 | { | |
1672 | off_t off = this->current_data_size(); | |
1673 | if (off == 0) | |
1674 | off += this->first_plt_entry_offset(); | |
1675 | gsym->set_plt_offset(off); | |
1676 | gsym->set_needs_dynsym_entry(); | |
1677 | unsigned int dynrel = elfcpp::R_POWERPC_JMP_SLOT; | |
1678 | this->rel_->add_global(gsym, dynrel, this, off, 0); | |
1679 | off += plt_entry_size; | |
1680 | this->set_current_data_size(off); | |
1681 | } | |
42cacb20 DE |
1682 | } |
1683 | ||
e5d5f5ed | 1684 | // Add an entry for a global ifunc symbol that resolves locally, to the IPLT. |
42cacb20 DE |
1685 | |
1686 | template<int size, bool big_endian> | |
03e25981 | 1687 | void |
e5d5f5ed | 1688 | Output_data_plt_powerpc<size, big_endian>::add_ifunc_entry(Symbol* gsym) |
42cacb20 | 1689 | { |
cf43a2fe AM |
1690 | if (!gsym->has_plt_offset()) |
1691 | { | |
1692 | off_t off = this->current_data_size(); | |
cf43a2fe | 1693 | gsym->set_plt_offset(off); |
e5d5f5ed AM |
1694 | unsigned int dynrel = elfcpp::R_POWERPC_IRELATIVE; |
1695 | if (size == 64) | |
1696 | dynrel = elfcpp::R_PPC64_JMP_IREL; | |
1697 | this->rel_->add_symbolless_global_addend(gsym, dynrel, this, off, 0); | |
1698 | off += plt_entry_size; | |
1699 | this->set_current_data_size(off); | |
1700 | } | |
1701 | } | |
1702 | ||
1703 | // Add an entry for a local ifunc symbol to the IPLT. | |
1704 | ||
1705 | template<int size, bool big_endian> | |
03e25981 | 1706 | void |
e5d5f5ed AM |
1707 | Output_data_plt_powerpc<size, big_endian>::add_local_ifunc_entry( |
1708 | Sized_relobj_file<size, big_endian>* relobj, | |
1709 | unsigned int local_sym_index) | |
1710 | { | |
1711 | if (!relobj->local_has_plt_offset(local_sym_index)) | |
1712 | { | |
1713 | off_t off = this->current_data_size(); | |
1714 | relobj->set_local_plt_offset(local_sym_index, off); | |
1715 | unsigned int dynrel = elfcpp::R_POWERPC_IRELATIVE; | |
1716 | if (size == 64) | |
1717 | dynrel = elfcpp::R_PPC64_JMP_IREL; | |
1718 | this->rel_->add_symbolless_local_addend(relobj, local_sym_index, dynrel, | |
1719 | this, off, 0); | |
cf43a2fe AM |
1720 | off += plt_entry_size; |
1721 | this->set_current_data_size(off); | |
1722 | } | |
42cacb20 DE |
1723 | } |
1724 | ||
dd93cd0a AM |
1725 | static const uint32_t add_0_11_11 = 0x7c0b5a14; |
1726 | static const uint32_t add_3_3_2 = 0x7c631214; | |
1727 | static const uint32_t add_3_3_13 = 0x7c636a14; | |
1728 | static const uint32_t add_11_0_11 = 0x7d605a14; | |
1729 | static const uint32_t add_12_2_11 = 0x7d825a14; | |
1730 | static const uint32_t addi_11_11 = 0x396b0000; | |
1731 | static const uint32_t addi_12_12 = 0x398c0000; | |
1732 | static const uint32_t addi_2_2 = 0x38420000; | |
1733 | static const uint32_t addi_3_2 = 0x38620000; | |
1734 | static const uint32_t addi_3_3 = 0x38630000; | |
1735 | static const uint32_t addis_0_2 = 0x3c020000; | |
1736 | static const uint32_t addis_0_13 = 0x3c0d0000; | |
c9269dff AM |
1737 | static const uint32_t addis_11_11 = 0x3d6b0000; |
1738 | static const uint32_t addis_11_30 = 0x3d7e0000; | |
1739 | static const uint32_t addis_12_12 = 0x3d8c0000; | |
dd93cd0a AM |
1740 | static const uint32_t addis_12_2 = 0x3d820000; |
1741 | static const uint32_t addis_3_2 = 0x3c620000; | |
1742 | static const uint32_t addis_3_13 = 0x3c6d0000; | |
c9269dff AM |
1743 | static const uint32_t b = 0x48000000; |
1744 | static const uint32_t bcl_20_31 = 0x429f0005; | |
1745 | static const uint32_t bctr = 0x4e800420; | |
f3a0ed29 | 1746 | static const uint32_t blr = 0x4e800020; |
c9269dff | 1747 | static const uint32_t blrl = 0x4e800021; |
dd93cd0a AM |
1748 | static const uint32_t cror_15_15_15 = 0x4def7b82; |
1749 | static const uint32_t cror_31_31_31 = 0x4ffffb82; | |
f3a0ed29 AM |
1750 | static const uint32_t ld_0_1 = 0xe8010000; |
1751 | static const uint32_t ld_0_12 = 0xe80c0000; | |
dd93cd0a AM |
1752 | static const uint32_t ld_11_12 = 0xe96c0000; |
1753 | static const uint32_t ld_11_2 = 0xe9620000; | |
1754 | static const uint32_t ld_2_1 = 0xe8410000; | |
1755 | static const uint32_t ld_2_11 = 0xe84b0000; | |
1756 | static const uint32_t ld_2_12 = 0xe84c0000; | |
1757 | static const uint32_t ld_2_2 = 0xe8420000; | |
f3a0ed29 | 1758 | static const uint32_t lfd_0_1 = 0xc8010000; |
dd93cd0a | 1759 | static const uint32_t li_0_0 = 0x38000000; |
f3a0ed29 | 1760 | static const uint32_t li_12_0 = 0x39800000; |
dd93cd0a | 1761 | static const uint32_t lis_0_0 = 0x3c000000; |
c9269dff AM |
1762 | static const uint32_t lis_11 = 0x3d600000; |
1763 | static const uint32_t lis_12 = 0x3d800000; | |
c9269dff AM |
1764 | static const uint32_t lwz_0_12 = 0x800c0000; |
1765 | static const uint32_t lwz_11_11 = 0x816b0000; | |
1766 | static const uint32_t lwz_11_30 = 0x817e0000; | |
1767 | static const uint32_t lwz_12_12 = 0x818c0000; | |
dd93cd0a | 1768 | static const uint32_t lwzu_0_12 = 0x840c0000; |
f3a0ed29 | 1769 | static const uint32_t lvx_0_12_0 = 0x7c0c00ce; |
c9269dff | 1770 | static const uint32_t mflr_0 = 0x7c0802a6; |
dd93cd0a | 1771 | static const uint32_t mflr_11 = 0x7d6802a6; |
c9269dff AM |
1772 | static const uint32_t mflr_12 = 0x7d8802a6; |
1773 | static const uint32_t mtctr_0 = 0x7c0903a6; | |
1774 | static const uint32_t mtctr_11 = 0x7d6903a6; | |
1775 | static const uint32_t mtlr_0 = 0x7c0803a6; | |
c9269dff | 1776 | static const uint32_t mtlr_12 = 0x7d8803a6; |
dd93cd0a | 1777 | static const uint32_t nop = 0x60000000; |
c9269dff | 1778 | static const uint32_t ori_0_0_0 = 0x60000000; |
f3a0ed29 AM |
1779 | static const uint32_t std_0_1 = 0xf8010000; |
1780 | static const uint32_t std_0_12 = 0xf80c0000; | |
dd93cd0a | 1781 | static const uint32_t std_2_1 = 0xf8410000; |
f3a0ed29 AM |
1782 | static const uint32_t stfd_0_1 = 0xd8010000; |
1783 | static const uint32_t stvx_0_12_0 = 0x7c0c01ce; | |
dd93cd0a | 1784 | static const uint32_t sub_11_11_12 = 0x7d6c5850; |
42cacb20 DE |
1785 | |
1786 | // Write out the PLT. | |
1787 | ||
1788 | template<int size, bool big_endian> | |
1789 | void | |
1790 | Output_data_plt_powerpc<size, big_endian>::do_write(Output_file* of) | |
1791 | { | |
cf43a2fe AM |
1792 | if (size == 32) |
1793 | { | |
1794 | const off_t offset = this->offset(); | |
1795 | const section_size_type oview_size | |
1796 | = convert_to_section_size_type(this->data_size()); | |
1797 | unsigned char* const oview = of->get_output_view(offset, oview_size); | |
1798 | unsigned char* pov = oview; | |
1799 | unsigned char* endpov = oview + oview_size; | |
1800 | ||
e5d5f5ed | 1801 | // The address of the .glink branch table |
cf43a2fe AM |
1802 | const Output_data_glink<size, big_endian>* glink |
1803 | = this->targ_->glink_section(); | |
1804 | elfcpp::Elf_types<32>::Elf_Addr branch_tab | |
1805 | = glink->address() + glink->pltresolve(); | |
1806 | ||
1807 | while (pov < endpov) | |
1808 | { | |
1809 | elfcpp::Swap<32, big_endian>::writeval(pov, branch_tab); | |
1810 | pov += 4; | |
1811 | branch_tab += 4; | |
1812 | } | |
1813 | ||
1814 | of->write_output_view(offset, oview_size, oview); | |
1815 | } | |
1816 | } | |
1817 | ||
1818 | // Create the PLT section. | |
1819 | ||
1820 | template<int size, bool big_endian> | |
1821 | void | |
1822 | Target_powerpc<size, big_endian>::make_plt_section(Layout* layout) | |
1823 | { | |
1824 | if (this->plt_ == NULL) | |
1825 | { | |
1826 | if (this->glink_ == NULL) | |
1827 | make_glink_section(layout); | |
1828 | ||
1829 | // Ensure that .rela.dyn always appears before .rela.plt This is | |
1830 | // necessary due to how, on PowerPC and some other targets, .rela.dyn | |
1831 | // needs to include .rela.plt in it's range. | |
1832 | this->rela_dyn_section(layout); | |
1833 | ||
e5d5f5ed AM |
1834 | Reloc_section* plt_rel = new Reloc_section(false); |
1835 | layout->add_output_section_data(".rela.plt", elfcpp::SHT_RELA, | |
1836 | elfcpp::SHF_ALLOC, plt_rel, | |
1837 | ORDER_DYNAMIC_PLT_RELOCS, false); | |
1838 | this->plt_ | |
1839 | = new Output_data_plt_powerpc<size, big_endian>(this, plt_rel, | |
1840 | size == 32 ? 0 : 24, | |
1841 | "** PLT"); | |
cf43a2fe AM |
1842 | layout->add_output_section_data(".plt", |
1843 | (size == 32 | |
1844 | ? elfcpp::SHT_PROGBITS | |
1845 | : elfcpp::SHT_NOBITS), | |
1846 | elfcpp::SHF_ALLOC | elfcpp::SHF_WRITE, | |
1847 | this->plt_, | |
1848 | (size == 32 | |
1849 | ? ORDER_SMALL_DATA | |
1850 | : ORDER_SMALL_BSS), | |
1851 | false); | |
1852 | } | |
1853 | } | |
1854 | ||
e5d5f5ed AM |
1855 | // Create the IPLT section. |
1856 | ||
1857 | template<int size, bool big_endian> | |
1858 | void | |
c9824451 | 1859 | Target_powerpc<size, big_endian>::make_iplt_section(Layout* layout) |
e5d5f5ed AM |
1860 | { |
1861 | if (this->iplt_ == NULL) | |
1862 | { | |
1863 | this->make_plt_section(layout); | |
1864 | ||
1865 | Reloc_section* iplt_rel = new Reloc_section(false); | |
1866 | this->rela_dyn_->output_section()->add_output_section_data(iplt_rel); | |
1867 | this->iplt_ | |
1868 | = new Output_data_plt_powerpc<size, big_endian>(this, iplt_rel, | |
1869 | 0, "** IPLT"); | |
1870 | this->plt_->output_section()->add_output_section_data(this->iplt_); | |
e5d5f5ed AM |
1871 | } |
1872 | } | |
1873 | ||
cf43a2fe AM |
1874 | // A class to handle .glink. |
1875 | ||
1876 | template<int size, bool big_endian> | |
1877 | class Output_data_glink : public Output_section_data | |
1878 | { | |
1879 | public: | |
c9269dff AM |
1880 | static const int pltresolve_size = 16*4; |
1881 | ||
cf43a2fe AM |
1882 | Output_data_glink(Target_powerpc<size, big_endian>*); |
1883 | ||
1884 | // Add an entry | |
1885 | void | |
c9824451 AM |
1886 | add_entry(const Sized_relobj_file<size, big_endian>*, |
1887 | const Symbol*, | |
1888 | const elfcpp::Rela<size, big_endian>&); | |
e5d5f5ed AM |
1889 | |
1890 | void | |
c9824451 AM |
1891 | add_entry(const Sized_relobj_file<size, big_endian>*, |
1892 | unsigned int, | |
1893 | const elfcpp::Rela<size, big_endian>&); | |
cf43a2fe AM |
1894 | |
1895 | unsigned int | |
c9824451 | 1896 | find_entry(const Symbol*) const; |
e5d5f5ed AM |
1897 | |
1898 | unsigned int | |
c9824451 AM |
1899 | find_entry(const Sized_relobj_file<size, big_endian>*, unsigned int) const; |
1900 | ||
1901 | unsigned int | |
1902 | find_entry(const Sized_relobj_file<size, big_endian>*, | |
1903 | const Symbol*, | |
1904 | const elfcpp::Rela<size, big_endian>&) const; | |
1905 | ||
1906 | unsigned int | |
1907 | find_entry(const Sized_relobj_file<size, big_endian>*, | |
1908 | unsigned int, | |
1909 | const elfcpp::Rela<size, big_endian>&) const; | |
cf43a2fe AM |
1910 | |
1911 | unsigned int | |
1912 | glink_entry_size() const | |
1913 | { | |
1914 | if (size == 32) | |
1915 | return 4 * 4; | |
1916 | else | |
1917 | // FIXME: We should be using multiple glink sections for | |
1918 | // stubs to support > 33M applications. | |
1919 | return 8 * 4; | |
1920 | } | |
1921 | ||
1922 | off_t | |
1923 | pltresolve() const | |
1924 | { | |
1925 | return this->pltresolve_; | |
1926 | } | |
1927 | ||
6ce78956 AM |
1928 | protected: |
1929 | // Write to a map file. | |
1930 | void | |
1931 | do_print_to_mapfile(Mapfile* mapfile) const | |
1932 | { mapfile->print_output_data(this, _("** glink")); } | |
1933 | ||
cf43a2fe | 1934 | private: |
cf43a2fe AM |
1935 | void |
1936 | set_final_data_size(); | |
1937 | ||
1938 | // Write out .glink | |
1939 | void | |
1940 | do_write(Output_file*); | |
1941 | ||
d1a8cabd | 1942 | class Glink_sym_ent |
cf43a2fe | 1943 | { |
d1a8cabd | 1944 | public: |
c9824451 AM |
1945 | Glink_sym_ent(const Symbol* sym) |
1946 | : sym_(sym), object_(0), addend_(0), locsym_(0) | |
1947 | { } | |
1948 | ||
1949 | Glink_sym_ent(const Sized_relobj_file<size, big_endian>* object, | |
1950 | unsigned int locsym_index) | |
1951 | : sym_(NULL), object_(object), addend_(0), locsym_(locsym_index) | |
1952 | { } | |
1953 | ||
1954 | Glink_sym_ent(const Sized_relobj_file<size, big_endian>* object, | |
1955 | const Symbol* sym, | |
1956 | const elfcpp::Rela<size, big_endian>& reloc) | |
e5d5f5ed | 1957 | : sym_(sym), object_(0), addend_(0), locsym_(0) |
cf43a2fe AM |
1958 | { |
1959 | if (size != 32) | |
1960 | this->addend_ = reloc.get_r_addend(); | |
d1a8cabd AM |
1961 | else if (parameters->options().output_is_position_independent() |
1962 | && (elfcpp::elf_r_type<size>(reloc.get_r_info()) | |
1963 | == elfcpp::R_PPC_PLTREL24)) | |
cf43a2fe | 1964 | { |
d1a8cabd | 1965 | this->addend_ = reloc.get_r_addend(); |
e5d5f5ed | 1966 | if (this->addend_ >= 32768) |
d1a8cabd | 1967 | this->object_ = object; |
cf43a2fe AM |
1968 | } |
1969 | } | |
1970 | ||
c9824451 AM |
1971 | Glink_sym_ent(const Sized_relobj_file<size, big_endian>* object, |
1972 | unsigned int locsym_index, | |
1973 | const elfcpp::Rela<size, big_endian>& reloc) | |
e5d5f5ed AM |
1974 | : sym_(NULL), object_(object), addend_(0), locsym_(locsym_index) |
1975 | { | |
1976 | if (size != 32) | |
1977 | this->addend_ = reloc.get_r_addend(); | |
1978 | else if (parameters->options().output_is_position_independent() | |
1979 | && (elfcpp::elf_r_type<size>(reloc.get_r_info()) | |
1980 | == elfcpp::R_PPC_PLTREL24)) | |
1981 | this->addend_ = reloc.get_r_addend(); | |
1982 | } | |
1983 | ||
cf43a2fe AM |
1984 | bool operator==(const Glink_sym_ent& that) const |
1985 | { | |
1986 | return (this->sym_ == that.sym_ | |
1987 | && this->object_ == that.object_ | |
e5d5f5ed AM |
1988 | && this->addend_ == that.addend_ |
1989 | && this->locsym_ == that.locsym_); | |
cf43a2fe | 1990 | } |
c9269dff AM |
1991 | |
1992 | const Symbol* sym_; | |
e5d5f5ed AM |
1993 | const Sized_relobj_file<size, big_endian>* object_; |
1994 | typename elfcpp::Elf_types<size>::Elf_Addr addend_; | |
1995 | unsigned int locsym_; | |
cf43a2fe AM |
1996 | }; |
1997 | ||
d1a8cabd | 1998 | class Glink_sym_ent_hash |
cf43a2fe | 1999 | { |
d1a8cabd | 2000 | public: |
cf43a2fe AM |
2001 | size_t operator()(const Glink_sym_ent& ent) const |
2002 | { | |
2003 | return (reinterpret_cast<uintptr_t>(ent.sym_) | |
2004 | ^ reinterpret_cast<uintptr_t>(ent.object_) | |
e5d5f5ed AM |
2005 | ^ ent.addend_ |
2006 | ^ ent.locsym_); | |
cf43a2fe AM |
2007 | } |
2008 | }; | |
2009 | ||
d1a8cabd | 2010 | // Map sym/object/addend to index. |
cf43a2fe AM |
2011 | typedef Unordered_map<Glink_sym_ent, unsigned int, |
2012 | Glink_sym_ent_hash> Glink_entries; | |
2013 | Glink_entries glink_entries_; | |
2014 | ||
2015 | // Offset of pltresolve stub (actually, branch table for 32-bit) | |
2016 | off_t pltresolve_; | |
2017 | ||
2018 | // Allows access to .got and .plt for do_write. | |
2019 | Target_powerpc<size, big_endian>* targ_; | |
2020 | }; | |
2021 | ||
2022 | // Create the glink section. | |
2023 | ||
2024 | template<int size, bool big_endian> | |
d83ce4e3 AM |
2025 | Output_data_glink<size, big_endian>::Output_data_glink( |
2026 | Target_powerpc<size, big_endian>* targ) | |
cf43a2fe AM |
2027 | : Output_section_data(16), |
2028 | pltresolve_(0), targ_(targ) | |
2029 | { | |
2030 | } | |
2031 | ||
2032 | // Add an entry to glink, if we do not already have one for this | |
d1a8cabd | 2033 | // sym/object/addend combo. |
cf43a2fe AM |
2034 | |
2035 | template<int size, bool big_endian> | |
2036 | void | |
d83ce4e3 | 2037 | Output_data_glink<size, big_endian>::add_entry( |
c9824451 | 2038 | const Sized_relobj_file<size, big_endian>* object, |
d83ce4e3 | 2039 | const Symbol* gsym, |
c9824451 | 2040 | const elfcpp::Rela<size, big_endian>& reloc) |
cf43a2fe | 2041 | { |
c9824451 | 2042 | Glink_sym_ent ent(object, gsym, reloc); |
cf43a2fe | 2043 | unsigned int indx = this->glink_entries_.size(); |
d83ce4e3 | 2044 | this->glink_entries_.insert(std::make_pair(ent, indx)); |
cf43a2fe AM |
2045 | } |
2046 | ||
e5d5f5ed AM |
2047 | template<int size, bool big_endian> |
2048 | void | |
2049 | Output_data_glink<size, big_endian>::add_entry( | |
c9824451 | 2050 | const Sized_relobj_file<size, big_endian>* object, |
e5d5f5ed | 2051 | unsigned int locsym_index, |
c9824451 | 2052 | const elfcpp::Rela<size, big_endian>& reloc) |
e5d5f5ed | 2053 | { |
c9824451 | 2054 | Glink_sym_ent ent(object, locsym_index, reloc); |
e5d5f5ed AM |
2055 | unsigned int indx = this->glink_entries_.size(); |
2056 | this->glink_entries_.insert(std::make_pair(ent, indx)); | |
2057 | } | |
2058 | ||
cf43a2fe AM |
2059 | template<int size, bool big_endian> |
2060 | unsigned int | |
d83ce4e3 | 2061 | Output_data_glink<size, big_endian>::find_entry( |
c9824451 | 2062 | const Sized_relobj_file<size, big_endian>* object, |
d83ce4e3 | 2063 | const Symbol* gsym, |
c9824451 AM |
2064 | const elfcpp::Rela<size, big_endian>& reloc) const |
2065 | { | |
2066 | Glink_sym_ent ent(object, gsym, reloc); | |
2067 | typename Glink_entries::const_iterator p = this->glink_entries_.find(ent); | |
2068 | gold_assert(p != this->glink_entries_.end()); | |
2069 | return p->second; | |
2070 | } | |
2071 | ||
2072 | template<int size, bool big_endian> | |
2073 | unsigned int | |
2074 | Output_data_glink<size, big_endian>::find_entry(const Symbol* gsym) const | |
cf43a2fe | 2075 | { |
c9824451 | 2076 | Glink_sym_ent ent(gsym); |
cf43a2fe AM |
2077 | typename Glink_entries::const_iterator p = this->glink_entries_.find(ent); |
2078 | gold_assert(p != this->glink_entries_.end()); | |
2079 | return p->second; | |
2080 | } | |
2081 | ||
e5d5f5ed AM |
2082 | template<int size, bool big_endian> |
2083 | unsigned int | |
2084 | Output_data_glink<size, big_endian>::find_entry( | |
c9824451 | 2085 | const Sized_relobj_file<size, big_endian>* object, |
e5d5f5ed | 2086 | unsigned int locsym_index, |
c9824451 | 2087 | const elfcpp::Rela<size, big_endian>& reloc) const |
e5d5f5ed | 2088 | { |
c9824451 AM |
2089 | Glink_sym_ent ent(object, locsym_index, reloc); |
2090 | typename Glink_entries::const_iterator p = this->glink_entries_.find(ent); | |
2091 | gold_assert(p != this->glink_entries_.end()); | |
2092 | return p->second; | |
2093 | } | |
2094 | ||
2095 | template<int size, bool big_endian> | |
2096 | unsigned int | |
2097 | Output_data_glink<size, big_endian>::find_entry( | |
2098 | const Sized_relobj_file<size, big_endian>* object, | |
2099 | unsigned int locsym_index) const | |
2100 | { | |
2101 | Glink_sym_ent ent(object, locsym_index); | |
e5d5f5ed AM |
2102 | typename Glink_entries::const_iterator p = this->glink_entries_.find(ent); |
2103 | gold_assert(p != this->glink_entries_.end()); | |
2104 | return p->second; | |
2105 | } | |
2106 | ||
cf43a2fe AM |
2107 | template<int size, bool big_endian> |
2108 | void | |
2109 | Output_data_glink<size, big_endian>::set_final_data_size() | |
2110 | { | |
2111 | unsigned int count = this->glink_entries_.size(); | |
2112 | off_t total = count; | |
2113 | ||
2114 | if (count != 0) | |
2115 | { | |
2116 | if (size == 32) | |
2117 | { | |
2118 | total *= 16; | |
2119 | this->pltresolve_ = total; | |
2120 | ||
2121 | // space for branch table | |
2122 | total += 4 * (count - 1); | |
2123 | ||
2124 | total += -total & 15; | |
2125 | total += this->pltresolve_size; | |
2126 | } | |
2127 | else | |
2128 | { | |
2129 | total *= 32; | |
2130 | this->pltresolve_ = total; | |
2131 | total += this->pltresolve_size; | |
2132 | ||
2133 | // space for branch table | |
2134 | total += 8 * count; | |
2135 | if (count > 0x8000) | |
2136 | total += 4 * (count - 0x8000); | |
2137 | } | |
2138 | } | |
2139 | ||
2140 | this->set_data_size(total); | |
2141 | } | |
2142 | ||
2143 | static inline uint32_t | |
2144 | l(uint32_t a) | |
2145 | { | |
2146 | return a & 0xffff; | |
2147 | } | |
2148 | ||
2149 | static inline uint32_t | |
2150 | hi(uint32_t a) | |
2151 | { | |
2152 | return l(a >> 16); | |
2153 | } | |
2154 | ||
2155 | static inline uint32_t | |
2156 | ha(uint32_t a) | |
2157 | { | |
2158 | return hi(a + 0x8000); | |
2159 | } | |
2160 | ||
2161 | template<bool big_endian> | |
2162 | static inline void | |
c9269dff | 2163 | write_insn(unsigned char* p, uint32_t v) |
cf43a2fe AM |
2164 | { |
2165 | elfcpp::Swap<32, big_endian>::writeval(p, v); | |
2166 | } | |
2167 | ||
2168 | // Write out .glink. | |
2169 | ||
2170 | template<int size, bool big_endian> | |
2171 | void | |
2172 | Output_data_glink<size, big_endian>::do_write(Output_file* of) | |
2173 | { | |
2174 | const off_t off = this->offset(); | |
42cacb20 DE |
2175 | const section_size_type oview_size = |
2176 | convert_to_section_size_type(this->data_size()); | |
cf43a2fe | 2177 | unsigned char* const oview = of->get_output_view(off, oview_size); |
c9269dff | 2178 | unsigned char* p; |
42cacb20 | 2179 | |
cf43a2fe | 2180 | // The base address of the .plt section. |
dd93cd0a | 2181 | typedef typename elfcpp::Elf_types<size>::Elf_Addr Address; |
e5d5f5ed | 2182 | static const Address invalid_address = static_cast<Address>(0) - 1; |
dd93cd0a | 2183 | Address plt_base = this->targ_->plt_section()->address(); |
e5d5f5ed | 2184 | Address iplt_base = invalid_address; |
cf43a2fe | 2185 | |
dd93cd0a AM |
2186 | const Output_data_got_powerpc<size, big_endian>* got |
2187 | = this->targ_->got_section(); | |
cf43a2fe AM |
2188 | |
2189 | if (size == 64) | |
2190 | { | |
dd93cd0a | 2191 | Address got_os_addr = got->output_section()->address(); |
c9269dff | 2192 | |
cf43a2fe AM |
2193 | // Write out call stubs. |
2194 | typename Glink_entries::const_iterator g; | |
2195 | for (g = this->glink_entries_.begin(); | |
2196 | g != this->glink_entries_.end(); | |
2197 | ++g) | |
2198 | { | |
e5d5f5ed AM |
2199 | Address plt_addr; |
2200 | bool is_ifunc; | |
2201 | const Symbol* gsym = g->first.sym_; | |
2202 | if (gsym != NULL) | |
2203 | { | |
2204 | is_ifunc = (gsym->type() == elfcpp::STT_GNU_IFUNC | |
2205 | && gsym->can_use_relative_reloc(false)); | |
2206 | plt_addr = gsym->plt_offset(); | |
2207 | } | |
2208 | else | |
2209 | { | |
2210 | is_ifunc = true; | |
2211 | const Sized_relobj_file<size, big_endian>* relobj | |
2212 | = g->first.object_; | |
2213 | unsigned int local_sym_index = g->first.locsym_; | |
2214 | plt_addr = relobj->local_plt_offset(local_sym_index); | |
2215 | } | |
2216 | if (is_ifunc) | |
2217 | { | |
2218 | if (iplt_base == invalid_address) | |
2219 | iplt_base = this->targ_->iplt_section()->address(); | |
2220 | plt_addr += iplt_base; | |
2221 | } | |
2222 | else | |
2223 | plt_addr += plt_base; | |
dd93cd0a AM |
2224 | const Powerpc_relobj<size, big_endian>* ppcobj = static_cast |
2225 | <const Powerpc_relobj<size, big_endian>*>(g->first.object_); | |
2226 | Address got_addr = got_os_addr + ppcobj->toc_base_offset(); | |
2227 | Address pltoff = plt_addr - got_addr; | |
cf43a2fe AM |
2228 | |
2229 | if (pltoff + 0x80008000 > 0xffffffff || (pltoff & 7) != 0) | |
2230 | gold_error(_("%s: linkage table error against `%s'"), | |
2231 | g->first.object_->name().c_str(), | |
2232 | g->first.sym_->demangled_name().c_str()); | |
2233 | ||
2234 | p = oview + g->second * this->glink_entry_size(); | |
2235 | if (ha(pltoff) != 0) | |
2236 | { | |
2237 | write_insn<big_endian>(p, addis_12_2 + ha(pltoff)), p += 4; | |
2238 | write_insn<big_endian>(p, std_2_1 + 40), p += 4; | |
2239 | write_insn<big_endian>(p, ld_11_12 + l(pltoff)), p += 4; | |
2240 | if (ha(pltoff + 16) != ha(pltoff)) | |
2241 | { | |
2242 | write_insn<big_endian>(p, addi_12_12 + l(pltoff)), p += 4; | |
2243 | pltoff = 0; | |
2244 | } | |
2245 | write_insn<big_endian>(p, mtctr_11), p += 4; | |
2246 | write_insn<big_endian>(p, ld_2_12 + l(pltoff + 8)), p += 4; | |
2247 | write_insn<big_endian>(p, ld_11_12 + l(pltoff + 16)), p += 4; | |
2248 | write_insn<big_endian>(p, bctr), p += 4; | |
2249 | } | |
2250 | else | |
2251 | { | |
2252 | write_insn<big_endian>(p, std_2_1 + 40), p += 4; | |
2253 | write_insn<big_endian>(p, ld_11_2 + l(pltoff)), p += 4; | |
2254 | if (ha(pltoff + 16) != ha(pltoff)) | |
2255 | { | |
2256 | write_insn<big_endian>(p, addi_2_2 + l(pltoff)), p += 4; | |
2257 | pltoff = 0; | |
2258 | } | |
2259 | write_insn<big_endian>(p, mtctr_11), p += 4; | |
2260 | write_insn<big_endian>(p, ld_11_2 + l(pltoff + 16)), p += 4; | |
2261 | write_insn<big_endian>(p, ld_2_2 + l(pltoff + 8)), p += 4; | |
2262 | write_insn<big_endian>(p, bctr), p += 4; | |
2263 | } | |
2264 | } | |
2265 | ||
2266 | // Write pltresolve stub. | |
2267 | p = oview + this->pltresolve_; | |
dd93cd0a AM |
2268 | Address after_bcl = this->address() + this->pltresolve_ + 16; |
2269 | Address pltoff = plt_base - after_bcl; | |
cf43a2fe AM |
2270 | |
2271 | elfcpp::Swap<64, big_endian>::writeval(p, pltoff), p += 8; | |
2272 | ||
2273 | write_insn<big_endian>(p, mflr_12), p += 4; | |
2274 | write_insn<big_endian>(p, bcl_20_31), p += 4; | |
2275 | write_insn<big_endian>(p, mflr_11), p += 4; | |
2276 | write_insn<big_endian>(p, ld_2_11 + l(-16)), p += 4; | |
2277 | write_insn<big_endian>(p, mtlr_12), p += 4; | |
2278 | write_insn<big_endian>(p, add_12_2_11), p += 4; | |
2279 | write_insn<big_endian>(p, ld_11_12 + 0), p += 4; | |
2280 | write_insn<big_endian>(p, ld_2_12 + 8), p += 4; | |
2281 | write_insn<big_endian>(p, mtctr_11), p += 4; | |
2282 | write_insn<big_endian>(p, ld_11_12 + 16), p += 4; | |
2283 | write_insn<big_endian>(p, bctr), p += 4; | |
2284 | while (p < oview + this->pltresolve_ + this->pltresolve_size) | |
2285 | write_insn<big_endian>(p, nop), p += 4; | |
2286 | ||
2287 | // Write lazy link call stubs. | |
2288 | uint32_t indx = 0; | |
2289 | while (p < oview + oview_size) | |
2290 | { | |
2291 | if (indx < 0x8000) | |
2292 | { | |
2293 | write_insn<big_endian>(p, li_0_0 + indx), p += 4; | |
2294 | } | |
2295 | else | |
2296 | { | |
2297 | write_insn<big_endian>(p, lis_0_0 + hi(indx)), p += 4; | |
2298 | write_insn<big_endian>(p, ori_0_0_0 + l(indx)), p += 4; | |
2299 | } | |
c9269dff | 2300 | uint32_t branch_off = this->pltresolve_ + 8 - (p - oview); |
cf43a2fe AM |
2301 | write_insn<big_endian>(p, b + (branch_off & 0x3fffffc)), p += 4; |
2302 | indx++; | |
2303 | } | |
2304 | } | |
2305 | else | |
2306 | { | |
dd93cd0a AM |
2307 | // The address of _GLOBAL_OFFSET_TABLE_. |
2308 | Address g_o_t = got->address() + got->g_o_t(); | |
c9269dff | 2309 | |
cf43a2fe AM |
2310 | // Write out call stubs. |
2311 | typename Glink_entries::const_iterator g; | |
2312 | for (g = this->glink_entries_.begin(); | |
2313 | g != this->glink_entries_.end(); | |
2314 | ++g) | |
2315 | { | |
e5d5f5ed AM |
2316 | Address plt_addr; |
2317 | bool is_ifunc; | |
2318 | const Symbol* gsym = g->first.sym_; | |
2319 | if (gsym != NULL) | |
2320 | { | |
2321 | is_ifunc = (gsym->type() == elfcpp::STT_GNU_IFUNC | |
2322 | && gsym->can_use_relative_reloc(false)); | |
2323 | plt_addr = gsym->plt_offset(); | |
2324 | } | |
2325 | else | |
2326 | { | |
2327 | is_ifunc = true; | |
2328 | const Sized_relobj_file<size, big_endian>* relobj | |
2329 | = g->first.object_; | |
2330 | unsigned int local_sym_index = g->first.locsym_; | |
2331 | plt_addr = relobj->local_plt_offset(local_sym_index); | |
2332 | } | |
2333 | if (is_ifunc) | |
2334 | { | |
2335 | if (iplt_base == invalid_address) | |
2336 | iplt_base = this->targ_->iplt_section()->address(); | |
2337 | plt_addr += iplt_base; | |
2338 | } | |
2339 | else | |
2340 | plt_addr += plt_base; | |
cf43a2fe AM |
2341 | |
2342 | p = oview + g->second * this->glink_entry_size(); | |
2343 | if (parameters->options().output_is_position_independent()) | |
2344 | { | |
e5d5f5ed | 2345 | Address got_addr; |
d1a8cabd AM |
2346 | const Powerpc_relobj<size, big_endian>* object = static_cast |
2347 | <const Powerpc_relobj<size, big_endian>*>(g->first.object_); | |
e5d5f5ed | 2348 | if (object != NULL && g->first.addend_ >= 32768) |
d1a8cabd AM |
2349 | { |
2350 | unsigned int got2 = object->got2_shndx(); | |
c9269dff AM |
2351 | got_addr = g->first.object_->get_output_section_offset(got2); |
2352 | gold_assert(got_addr != invalid_address); | |
2353 | got_addr += (g->first.object_->output_section(got2)->address() | |
2354 | + g->first.addend_); | |
d1a8cabd | 2355 | } |
cf43a2fe AM |
2356 | else |
2357 | got_addr = g_o_t; | |
2358 | ||
dd93cd0a | 2359 | Address pltoff = plt_addr - got_addr; |
cf43a2fe AM |
2360 | if (ha(pltoff) == 0) |
2361 | { | |
2362 | write_insn<big_endian>(p + 0, lwz_11_30 + l(pltoff)); | |
2363 | write_insn<big_endian>(p + 4, mtctr_11); | |
2364 | write_insn<big_endian>(p + 8, bctr); | |
2365 | } | |
2366 | else | |
2367 | { | |
2368 | write_insn<big_endian>(p + 0, addis_11_30 + ha(pltoff)); | |
2369 | write_insn<big_endian>(p + 4, lwz_11_11 + l(pltoff)); | |
2370 | write_insn<big_endian>(p + 8, mtctr_11); | |
2371 | write_insn<big_endian>(p + 12, bctr); | |
2372 | } | |
2373 | } | |
2374 | else | |
2375 | { | |
2376 | write_insn<big_endian>(p + 0, lis_11 + ha(plt_addr)); | |
2377 | write_insn<big_endian>(p + 4, lwz_11_11 + l(plt_addr)); | |
2378 | write_insn<big_endian>(p + 8, mtctr_11); | |
2379 | write_insn<big_endian>(p + 12, bctr); | |
2380 | } | |
2381 | } | |
42cacb20 | 2382 | |
cf43a2fe AM |
2383 | // Write out pltresolve branch table. |
2384 | p = oview + this->pltresolve_; | |
2385 | unsigned int the_end = oview_size - this->pltresolve_size; | |
c9269dff | 2386 | unsigned char* end_p = oview + the_end; |
cf43a2fe AM |
2387 | while (p < end_p - 8 * 4) |
2388 | write_insn<big_endian>(p, b + end_p - p), p += 4; | |
2389 | while (p < end_p) | |
2390 | write_insn<big_endian>(p, nop), p += 4; | |
42cacb20 | 2391 | |
cf43a2fe AM |
2392 | // Write out pltresolve call stub. |
2393 | if (parameters->options().output_is_position_independent()) | |
42cacb20 | 2394 | { |
dd93cd0a AM |
2395 | Address res0_off = this->pltresolve_; |
2396 | Address after_bcl_off = the_end + 12; | |
2397 | Address bcl_res0 = after_bcl_off - res0_off; | |
cf43a2fe AM |
2398 | |
2399 | write_insn<big_endian>(p + 0, addis_11_11 + ha(bcl_res0)); | |
2400 | write_insn<big_endian>(p + 4, mflr_0); | |
2401 | write_insn<big_endian>(p + 8, bcl_20_31); | |
2402 | write_insn<big_endian>(p + 12, addi_11_11 + l(bcl_res0)); | |
2403 | write_insn<big_endian>(p + 16, mflr_12); | |
2404 | write_insn<big_endian>(p + 20, mtlr_0); | |
2405 | write_insn<big_endian>(p + 24, sub_11_11_12); | |
2406 | ||
dd93cd0a | 2407 | Address got_bcl = g_o_t + 4 - (after_bcl_off + this->address()); |
cf43a2fe AM |
2408 | |
2409 | write_insn<big_endian>(p + 28, addis_12_12 + ha(got_bcl)); | |
2410 | if (ha(got_bcl) == ha(got_bcl + 4)) | |
2411 | { | |
2412 | write_insn<big_endian>(p + 32, lwz_0_12 + l(got_bcl)); | |
2413 | write_insn<big_endian>(p + 36, lwz_12_12 + l(got_bcl + 4)); | |
2414 | } | |
2415 | else | |
2416 | { | |
2417 | write_insn<big_endian>(p + 32, lwzu_0_12 + l(got_bcl)); | |
2418 | write_insn<big_endian>(p + 36, lwz_12_12 + 4); | |
2419 | } | |
2420 | write_insn<big_endian>(p + 40, mtctr_0); | |
2421 | write_insn<big_endian>(p + 44, add_0_11_11); | |
2422 | write_insn<big_endian>(p + 48, add_11_0_11); | |
2423 | write_insn<big_endian>(p + 52, bctr); | |
2424 | write_insn<big_endian>(p + 56, nop); | |
2425 | write_insn<big_endian>(p + 60, nop); | |
42cacb20 | 2426 | } |
cf43a2fe | 2427 | else |
42cacb20 | 2428 | { |
dd93cd0a | 2429 | Address res0 = this->pltresolve_ + this->address(); |
cf43a2fe AM |
2430 | |
2431 | write_insn<big_endian>(p + 0, lis_12 + ha(g_o_t + 4)); | |
2432 | write_insn<big_endian>(p + 4, addis_11_11 + ha(-res0)); | |
2433 | if (ha(g_o_t + 4) == ha(g_o_t + 8)) | |
2434 | write_insn<big_endian>(p + 8, lwz_0_12 + l(g_o_t + 4)); | |
2435 | else | |
2436 | write_insn<big_endian>(p + 8, lwzu_0_12 + l(g_o_t + 4)); | |
2437 | write_insn<big_endian>(p + 12, addi_11_11 + l(-res0)); | |
2438 | write_insn<big_endian>(p + 16, mtctr_0); | |
2439 | write_insn<big_endian>(p + 20, add_0_11_11); | |
2440 | if (ha(g_o_t + 4) == ha(g_o_t + 8)) | |
2441 | write_insn<big_endian>(p + 24, lwz_12_12 + l(g_o_t + 8)); | |
2442 | else | |
2443 | write_insn<big_endian>(p + 24, lwz_12_12 + 4); | |
2444 | write_insn<big_endian>(p + 28, add_11_0_11); | |
2445 | write_insn<big_endian>(p + 32, bctr); | |
2446 | write_insn<big_endian>(p + 36, nop); | |
2447 | write_insn<big_endian>(p + 40, nop); | |
2448 | write_insn<big_endian>(p + 44, nop); | |
2449 | write_insn<big_endian>(p + 48, nop); | |
2450 | write_insn<big_endian>(p + 52, nop); | |
2451 | write_insn<big_endian>(p + 56, nop); | |
2452 | write_insn<big_endian>(p + 60, nop); | |
42cacb20 | 2453 | } |
cf43a2fe | 2454 | p += 64; |
42cacb20 DE |
2455 | } |
2456 | ||
cf43a2fe AM |
2457 | of->write_output_view(off, oview_size, oview); |
2458 | } | |
2459 | ||
f3a0ed29 AM |
2460 | |
2461 | // A class to handle linker generated save/restore functions. | |
2462 | ||
2463 | template<int size, bool big_endian> | |
2464 | class Output_data_save_res : public Output_section_data_build | |
2465 | { | |
2466 | public: | |
2467 | Output_data_save_res(Symbol_table* symtab); | |
2468 | ||
2469 | protected: | |
2470 | // Write to a map file. | |
2471 | void | |
2472 | do_print_to_mapfile(Mapfile* mapfile) const | |
2473 | { mapfile->print_output_data(this, _("** save/restore")); } | |
2474 | ||
2475 | void | |
2476 | do_write(Output_file*); | |
2477 | ||
2478 | private: | |
2479 | // The maximum size of save/restore contents. | |
2480 | static const unsigned int savres_max = 218*4; | |
2481 | ||
2482 | void | |
2483 | savres_define(Symbol_table* symtab, | |
2484 | const char *name, | |
2485 | unsigned int lo, unsigned int hi, | |
2486 | unsigned char* write_ent(unsigned char*, int), | |
2487 | unsigned char* write_tail(unsigned char*, int)); | |
2488 | ||
2489 | unsigned char *contents_; | |
2490 | }; | |
2491 | ||
2492 | template<bool big_endian> | |
2493 | static unsigned char* | |
2494 | savegpr0(unsigned char* p, int r) | |
2495 | { | |
2496 | uint32_t insn = std_0_1 + (r << 21) + (1 << 16) - (32 - r) * 8; | |
2497 | write_insn<big_endian>(p, insn); | |
2498 | return p + 4; | |
2499 | } | |
2500 | ||
2501 | template<bool big_endian> | |
2502 | static unsigned char* | |
2503 | savegpr0_tail(unsigned char* p, int r) | |
2504 | { | |
2505 | p = savegpr0<big_endian>(p, r); | |
2506 | uint32_t insn = std_0_1 + 16; | |
2507 | write_insn<big_endian>(p, insn); | |
2508 | p = p + 4; | |
2509 | write_insn<big_endian>(p, blr); | |
2510 | return p + 4; | |
2511 | } | |
2512 | ||
2513 | template<bool big_endian> | |
2514 | static unsigned char* | |
2515 | restgpr0(unsigned char* p, int r) | |
2516 | { | |
2517 | uint32_t insn = ld_0_1 + (r << 21) + (1 << 16) - (32 - r) * 8; | |
2518 | write_insn<big_endian>(p, insn); | |
2519 | return p + 4; | |
2520 | } | |
2521 | ||
2522 | template<bool big_endian> | |
2523 | static unsigned char* | |
2524 | restgpr0_tail(unsigned char* p, int r) | |
2525 | { | |
2526 | uint32_t insn = ld_0_1 + 16; | |
2527 | write_insn<big_endian>(p, insn); | |
2528 | p = p + 4; | |
2529 | p = restgpr0<big_endian>(p, r); | |
2530 | write_insn<big_endian>(p, mtlr_0); | |
2531 | p = p + 4; | |
2532 | if (r == 29) | |
2533 | { | |
2534 | p = restgpr0<big_endian>(p, 30); | |
2535 | p = restgpr0<big_endian>(p, 31); | |
2536 | } | |
2537 | write_insn<big_endian>(p, blr); | |
2538 | return p + 4; | |
2539 | } | |
2540 | ||
2541 | template<bool big_endian> | |
2542 | static unsigned char* | |
2543 | savegpr1(unsigned char* p, int r) | |
2544 | { | |
2545 | uint32_t insn = std_0_12 + (r << 21) + (1 << 16) - (32 - r) * 8; | |
2546 | write_insn<big_endian>(p, insn); | |
2547 | return p + 4; | |
2548 | } | |
2549 | ||
2550 | template<bool big_endian> | |
2551 | static unsigned char* | |
2552 | savegpr1_tail(unsigned char* p, int r) | |
2553 | { | |
2554 | p = savegpr1<big_endian>(p, r); | |
2555 | write_insn<big_endian>(p, blr); | |
2556 | return p + 4; | |
2557 | } | |
2558 | ||
2559 | template<bool big_endian> | |
2560 | static unsigned char* | |
2561 | restgpr1(unsigned char* p, int r) | |
2562 | { | |
2563 | uint32_t insn = ld_0_12 + (r << 21) + (1 << 16) - (32 - r) * 8; | |
2564 | write_insn<big_endian>(p, insn); | |
2565 | return p + 4; | |
2566 | } | |
2567 | ||
2568 | template<bool big_endian> | |
2569 | static unsigned char* | |
2570 | restgpr1_tail(unsigned char* p, int r) | |
2571 | { | |
2572 | p = restgpr1<big_endian>(p, r); | |
2573 | write_insn<big_endian>(p, blr); | |
2574 | return p + 4; | |
2575 | } | |
2576 | ||
2577 | template<bool big_endian> | |
2578 | static unsigned char* | |
2579 | savefpr(unsigned char* p, int r) | |
2580 | { | |
2581 | uint32_t insn = stfd_0_1 + (r << 21) + (1 << 16) - (32 - r) * 8; | |
2582 | write_insn<big_endian>(p, insn); | |
2583 | return p + 4; | |
2584 | } | |
2585 | ||
2586 | template<bool big_endian> | |
2587 | static unsigned char* | |
2588 | savefpr0_tail(unsigned char* p, int r) | |
2589 | { | |
2590 | p = savefpr<big_endian>(p, r); | |
2591 | write_insn<big_endian>(p, std_0_1 + 16); | |
2592 | p = p + 4; | |
2593 | write_insn<big_endian>(p, blr); | |
2594 | return p + 4; | |
2595 | } | |
2596 | ||
2597 | template<bool big_endian> | |
2598 | static unsigned char* | |
2599 | restfpr(unsigned char* p, int r) | |
2600 | { | |
2601 | uint32_t insn = lfd_0_1 + (r << 21) + (1 << 16) - (32 - r) * 8; | |
2602 | write_insn<big_endian>(p, insn); | |
2603 | return p + 4; | |
2604 | } | |
2605 | ||
2606 | template<bool big_endian> | |
2607 | static unsigned char* | |
2608 | restfpr0_tail(unsigned char* p, int r) | |
2609 | { | |
2610 | write_insn<big_endian>(p, ld_0_1 + 16); | |
2611 | p = p + 4; | |
2612 | p = restfpr<big_endian>(p, r); | |
2613 | write_insn<big_endian>(p, mtlr_0); | |
2614 | p = p + 4; | |
2615 | if (r == 29) | |
2616 | { | |
2617 | p = restfpr<big_endian>(p, 30); | |
2618 | p = restfpr<big_endian>(p, 31); | |
2619 | } | |
2620 | write_insn<big_endian>(p, blr); | |
2621 | return p + 4; | |
2622 | } | |
2623 | ||
2624 | template<bool big_endian> | |
2625 | static unsigned char* | |
2626 | savefpr1_tail(unsigned char* p, int r) | |
2627 | { | |
2628 | p = savefpr<big_endian>(p, r); | |
2629 | write_insn<big_endian>(p, blr); | |
2630 | return p + 4; | |
2631 | } | |
2632 | ||
2633 | template<bool big_endian> | |
2634 | static unsigned char* | |
2635 | restfpr1_tail(unsigned char* p, int r) | |
2636 | { | |
2637 | p = restfpr<big_endian>(p, r); | |
2638 | write_insn<big_endian>(p, blr); | |
2639 | return p + 4; | |
2640 | } | |
2641 | ||
2642 | template<bool big_endian> | |
2643 | static unsigned char* | |
2644 | savevr(unsigned char* p, int r) | |
2645 | { | |
2646 | uint32_t insn = li_12_0 + (1 << 16) - (32 - r) * 16; | |
2647 | write_insn<big_endian>(p, insn); | |
2648 | p = p + 4; | |
2649 | insn = stvx_0_12_0 + (r << 21); | |
2650 | write_insn<big_endian>(p, insn); | |
2651 | return p + 4; | |
2652 | } | |
2653 | ||
2654 | template<bool big_endian> | |
2655 | static unsigned char* | |
2656 | savevr_tail(unsigned char* p, int r) | |
2657 | { | |
2658 | p = savevr<big_endian>(p, r); | |
2659 | write_insn<big_endian>(p, blr); | |
2660 | return p + 4; | |
2661 | } | |
2662 | ||
2663 | template<bool big_endian> | |
2664 | static unsigned char* | |
2665 | restvr(unsigned char* p, int r) | |
2666 | { | |
2667 | uint32_t insn = li_12_0 + (1 << 16) - (32 - r) * 16; | |
2668 | write_insn<big_endian>(p, insn); | |
2669 | p = p + 4; | |
2670 | insn = lvx_0_12_0 + (r << 21); | |
2671 | write_insn<big_endian>(p, insn); | |
2672 | return p + 4; | |
2673 | } | |
2674 | ||
2675 | template<bool big_endian> | |
2676 | static unsigned char* | |
2677 | restvr_tail(unsigned char* p, int r) | |
2678 | { | |
2679 | p = restvr<big_endian>(p, r); | |
2680 | write_insn<big_endian>(p, blr); | |
2681 | return p + 4; | |
2682 | } | |
2683 | ||
2684 | ||
2685 | template<int size, bool big_endian> | |
2686 | Output_data_save_res<size, big_endian>::Output_data_save_res( | |
2687 | Symbol_table* symtab) | |
2688 | : Output_section_data_build(4), | |
2689 | contents_(NULL) | |
2690 | { | |
2691 | this->savres_define(symtab, | |
2692 | "_savegpr0_", 14, 31, | |
2693 | savegpr0<big_endian>, savegpr0_tail<big_endian>); | |
2694 | this->savres_define(symtab, | |
2695 | "_restgpr0_", 14, 29, | |
2696 | restgpr0<big_endian>, restgpr0_tail<big_endian>); | |
2697 | this->savres_define(symtab, | |
2698 | "_restgpr0_", 30, 31, | |
2699 | restgpr0<big_endian>, restgpr0_tail<big_endian>); | |
2700 | this->savres_define(symtab, | |
2701 | "_savegpr1_", 14, 31, | |
2702 | savegpr1<big_endian>, savegpr1_tail<big_endian>); | |
2703 | this->savres_define(symtab, | |
2704 | "_restgpr1_", 14, 31, | |
2705 | restgpr1<big_endian>, restgpr1_tail<big_endian>); | |
2706 | this->savres_define(symtab, | |
2707 | "_savefpr_", 14, 31, | |
2708 | savefpr<big_endian>, savefpr0_tail<big_endian>); | |
2709 | this->savres_define(symtab, | |
2710 | "_restfpr_", 14, 29, | |
2711 | restfpr<big_endian>, restfpr0_tail<big_endian>); | |
2712 | this->savres_define(symtab, | |
2713 | "_restfpr_", 30, 31, | |
2714 | restfpr<big_endian>, restfpr0_tail<big_endian>); | |
2715 | this->savres_define(symtab, | |
2716 | "._savef", 14, 31, | |
2717 | savefpr<big_endian>, savefpr1_tail<big_endian>); | |
2718 | this->savres_define(symtab, | |
2719 | "._restf", 14, 31, | |
2720 | restfpr<big_endian>, restfpr1_tail<big_endian>); | |
2721 | this->savres_define(symtab, | |
2722 | "_savevr_", 20, 31, | |
2723 | savevr<big_endian>, savevr_tail<big_endian>); | |
2724 | this->savres_define(symtab, | |
2725 | "_restvr_", 20, 31, | |
2726 | restvr<big_endian>, restvr_tail<big_endian>); | |
2727 | } | |
2728 | ||
2729 | template<int size, bool big_endian> | |
2730 | void | |
2731 | Output_data_save_res<size, big_endian>::savres_define( | |
2732 | Symbol_table* symtab, | |
2733 | const char *name, | |
2734 | unsigned int lo, unsigned int hi, | |
2735 | unsigned char* write_ent(unsigned char*, int), | |
2736 | unsigned char* write_tail(unsigned char*, int)) | |
2737 | { | |
2738 | size_t len = strlen(name); | |
2739 | bool writing = false; | |
2740 | char sym[16]; | |
2741 | ||
2742 | memcpy(sym, name, len); | |
2743 | sym[len + 2] = 0; | |
2744 | ||
2745 | for (unsigned int i = lo; i <= hi; i++) | |
2746 | { | |
2747 | sym[len + 0] = i / 10 + '0'; | |
2748 | sym[len + 1] = i % 10 + '0'; | |
2749 | Symbol* gsym = symtab->lookup(sym); | |
2750 | bool refd = gsym != NULL && gsym->is_undefined(); | |
2751 | writing = writing || refd; | |
2752 | if (writing) | |
2753 | { | |
2754 | if (this->contents_ == NULL) | |
2755 | this->contents_ = new unsigned char[this->savres_max]; | |
2756 | ||
2757 | off_t value = this->current_data_size(); | |
2758 | unsigned char* p = this->contents_ + value; | |
2759 | if (i != hi) | |
2760 | p = write_ent(p, i); | |
2761 | else | |
2762 | p = write_tail(p, i); | |
2763 | off_t cur_size = p - this->contents_; | |
2764 | this->set_current_data_size(cur_size); | |
2765 | if (refd) | |
2766 | symtab->define_in_output_data(sym, NULL, Symbol_table::PREDEFINED, | |
2767 | this, value, cur_size - value, | |
2768 | elfcpp::STT_FUNC, elfcpp::STB_GLOBAL, | |
2769 | elfcpp::STV_HIDDEN, 0, false, false); | |
2770 | } | |
2771 | } | |
2772 | } | |
2773 | ||
2774 | // Write out save/restore. | |
2775 | ||
2776 | template<int size, bool big_endian> | |
2777 | void | |
2778 | Output_data_save_res<size, big_endian>::do_write(Output_file* of) | |
2779 | { | |
2780 | const off_t off = this->offset(); | |
2781 | const section_size_type oview_size = | |
2782 | convert_to_section_size_type(this->data_size()); | |
2783 | unsigned char* const oview = of->get_output_view(off, oview_size); | |
2784 | memcpy(oview, this->contents_, oview_size); | |
2785 | of->write_output_view(off, oview_size, oview); | |
2786 | } | |
2787 | ||
2788 | ||
cf43a2fe | 2789 | // Create the glink section. |
42cacb20 | 2790 | |
cf43a2fe AM |
2791 | template<int size, bool big_endian> |
2792 | void | |
2793 | Target_powerpc<size, big_endian>::make_glink_section(Layout* layout) | |
2794 | { | |
2795 | if (this->glink_ == NULL) | |
2796 | { | |
2797 | this->glink_ = new Output_data_glink<size, big_endian>(this); | |
2798 | layout->add_output_section_data(".text", elfcpp::SHT_PROGBITS, | |
2799 | elfcpp::SHF_ALLOC | elfcpp::SHF_EXECINSTR, | |
2800 | this->glink_, ORDER_TEXT, false); | |
2801 | } | |
42cacb20 DE |
2802 | } |
2803 | ||
2804 | // Create a PLT entry for a global symbol. | |
2805 | ||
2806 | template<int size, bool big_endian> | |
2807 | void | |
d83ce4e3 AM |
2808 | Target_powerpc<size, big_endian>::make_plt_entry( |
2809 | Layout* layout, | |
2810 | Symbol* gsym, | |
2811 | const elfcpp::Rela<size, big_endian>& reloc, | |
e5d5f5ed | 2812 | const Sized_relobj_file<size, big_endian>* object) |
42cacb20 | 2813 | { |
e5d5f5ed AM |
2814 | if (gsym->type() == elfcpp::STT_GNU_IFUNC |
2815 | && gsym->can_use_relative_reloc(false)) | |
2816 | { | |
2817 | if (this->iplt_ == NULL) | |
c9824451 | 2818 | this->make_iplt_section(layout); |
03e25981 | 2819 | this->iplt_->add_ifunc_entry(gsym); |
e5d5f5ed AM |
2820 | } |
2821 | else | |
2822 | { | |
2823 | if (this->plt_ == NULL) | |
2824 | this->make_plt_section(layout); | |
03e25981 | 2825 | this->plt_->add_entry(gsym); |
e5d5f5ed | 2826 | } |
03e25981 | 2827 | this->glink_->add_entry(object, gsym, reloc); |
e5d5f5ed | 2828 | } |
42cacb20 | 2829 | |
e5d5f5ed | 2830 | // Make a PLT entry for a local STT_GNU_IFUNC symbol. |
612a8d3d | 2831 | |
e5d5f5ed AM |
2832 | template<int size, bool big_endian> |
2833 | void | |
2834 | Target_powerpc<size, big_endian>::make_local_ifunc_plt_entry( | |
2835 | Layout* layout, | |
e5d5f5ed AM |
2836 | const elfcpp::Rela<size, big_endian>& reloc, |
2837 | Sized_relobj_file<size, big_endian>* relobj) | |
2838 | { | |
2839 | if (this->iplt_ == NULL) | |
c9824451 | 2840 | this->make_iplt_section(layout); |
e5d5f5ed | 2841 | unsigned int r_sym = elfcpp::elf_r_sym<size>(reloc.get_r_info()); |
03e25981 AM |
2842 | this->iplt_->add_local_ifunc_entry(relobj, r_sym); |
2843 | this->glink_->add_entry(relobj, r_sym, reloc); | |
42cacb20 DE |
2844 | } |
2845 | ||
0e70b911 CC |
2846 | // Return the number of entries in the PLT. |
2847 | ||
2848 | template<int size, bool big_endian> | |
2849 | unsigned int | |
2850 | Target_powerpc<size, big_endian>::plt_entry_count() const | |
2851 | { | |
2852 | if (this->plt_ == NULL) | |
2853 | return 0; | |
e5d5f5ed AM |
2854 | unsigned int count = this->plt_->entry_count(); |
2855 | if (this->iplt_ != NULL) | |
2856 | count += this->iplt_->entry_count(); | |
2857 | return count; | |
0e70b911 CC |
2858 | } |
2859 | ||
2860 | // Return the offset of the first non-reserved PLT entry. | |
2861 | ||
2862 | template<int size, bool big_endian> | |
2863 | unsigned int | |
2864 | Target_powerpc<size, big_endian>::first_plt_entry_offset() const | |
2865 | { | |
e5d5f5ed | 2866 | return this->plt_->first_plt_entry_offset(); |
0e70b911 CC |
2867 | } |
2868 | ||
2869 | // Return the size of each PLT entry. | |
2870 | ||
2871 | template<int size, bool big_endian> | |
2872 | unsigned int | |
2873 | Target_powerpc<size, big_endian>::plt_entry_size() const | |
2874 | { | |
2875 | return Output_data_plt_powerpc<size, big_endian>::get_plt_entry_size(); | |
2876 | } | |
2877 | ||
dd93cd0a | 2878 | // Create a GOT entry for local dynamic __tls_get_addr calls. |
42cacb20 DE |
2879 | |
2880 | template<int size, bool big_endian> | |
2881 | unsigned int | |
dd93cd0a | 2882 | Target_powerpc<size, big_endian>::tlsld_got_offset( |
6fa2a40b CC |
2883 | Symbol_table* symtab, |
2884 | Layout* layout, | |
2885 | Sized_relobj_file<size, big_endian>* object) | |
42cacb20 | 2886 | { |
dd93cd0a | 2887 | if (this->tlsld_got_offset_ == -1U) |
42cacb20 DE |
2888 | { |
2889 | gold_assert(symtab != NULL && layout != NULL && object != NULL); | |
2890 | Reloc_section* rela_dyn = this->rela_dyn_section(layout); | |
dd93cd0a AM |
2891 | Output_data_got_powerpc<size, big_endian>* got |
2892 | = this->got_section(symtab, layout); | |
2893 | unsigned int got_offset = got->add_constant_pair(0, 0); | |
42cacb20 DE |
2894 | rela_dyn->add_local(object, 0, elfcpp::R_POWERPC_DTPMOD, got, |
2895 | got_offset, 0); | |
dd93cd0a | 2896 | this->tlsld_got_offset_ = got_offset; |
42cacb20 | 2897 | } |
dd93cd0a | 2898 | return this->tlsld_got_offset_; |
42cacb20 DE |
2899 | } |
2900 | ||
95a2c8d6 RS |
2901 | // Get the Reference_flags for a particular relocation. |
2902 | ||
2903 | template<int size, bool big_endian> | |
2904 | int | |
d83ce4e3 | 2905 | Target_powerpc<size, big_endian>::Scan::get_reference_flags(unsigned int r_type) |
95a2c8d6 RS |
2906 | { |
2907 | switch (r_type) | |
2908 | { | |
2909 | case elfcpp::R_POWERPC_NONE: | |
2910 | case elfcpp::R_POWERPC_GNU_VTINHERIT: | |
2911 | case elfcpp::R_POWERPC_GNU_VTENTRY: | |
2912 | case elfcpp::R_PPC64_TOC: | |
2913 | // No symbol reference. | |
2914 | return 0; | |
2915 | ||
dd93cd0a AM |
2916 | case elfcpp::R_PPC64_ADDR64: |
2917 | case elfcpp::R_PPC64_UADDR64: | |
2918 | case elfcpp::R_POWERPC_ADDR32: | |
2919 | case elfcpp::R_POWERPC_UADDR32: | |
95a2c8d6 | 2920 | case elfcpp::R_POWERPC_ADDR16: |
dd93cd0a | 2921 | case elfcpp::R_POWERPC_UADDR16: |
95a2c8d6 RS |
2922 | case elfcpp::R_POWERPC_ADDR16_LO: |
2923 | case elfcpp::R_POWERPC_ADDR16_HI: | |
2924 | case elfcpp::R_POWERPC_ADDR16_HA: | |
95a2c8d6 RS |
2925 | return Symbol::ABSOLUTE_REF; |
2926 | ||
dd93cd0a AM |
2927 | case elfcpp::R_POWERPC_ADDR24: |
2928 | case elfcpp::R_POWERPC_ADDR14: | |
2929 | case elfcpp::R_POWERPC_ADDR14_BRTAKEN: | |
2930 | case elfcpp::R_POWERPC_ADDR14_BRNTAKEN: | |
2931 | return Symbol::FUNCTION_CALL | Symbol::ABSOLUTE_REF; | |
2932 | ||
e5d5f5ed | 2933 | case elfcpp::R_PPC64_REL64: |
dd93cd0a | 2934 | case elfcpp::R_POWERPC_REL32: |
95a2c8d6 | 2935 | case elfcpp::R_PPC_LOCAL24PC: |
6ce78956 AM |
2936 | case elfcpp::R_POWERPC_REL16: |
2937 | case elfcpp::R_POWERPC_REL16_LO: | |
2938 | case elfcpp::R_POWERPC_REL16_HI: | |
2939 | case elfcpp::R_POWERPC_REL16_HA: | |
95a2c8d6 RS |
2940 | return Symbol::RELATIVE_REF; |
2941 | ||
dd93cd0a | 2942 | case elfcpp::R_POWERPC_REL24: |
95a2c8d6 | 2943 | case elfcpp::R_PPC_PLTREL24: |
dd93cd0a AM |
2944 | case elfcpp::R_POWERPC_REL14: |
2945 | case elfcpp::R_POWERPC_REL14_BRTAKEN: | |
2946 | case elfcpp::R_POWERPC_REL14_BRNTAKEN: | |
95a2c8d6 RS |
2947 | return Symbol::FUNCTION_CALL | Symbol::RELATIVE_REF; |
2948 | ||
2949 | case elfcpp::R_POWERPC_GOT16: | |
2950 | case elfcpp::R_POWERPC_GOT16_LO: | |
2951 | case elfcpp::R_POWERPC_GOT16_HI: | |
2952 | case elfcpp::R_POWERPC_GOT16_HA: | |
e5d5f5ed AM |
2953 | case elfcpp::R_PPC64_GOT16_DS: |
2954 | case elfcpp::R_PPC64_GOT16_LO_DS: | |
95a2c8d6 RS |
2955 | case elfcpp::R_PPC64_TOC16: |
2956 | case elfcpp::R_PPC64_TOC16_LO: | |
2957 | case elfcpp::R_PPC64_TOC16_HI: | |
2958 | case elfcpp::R_PPC64_TOC16_HA: | |
2959 | case elfcpp::R_PPC64_TOC16_DS: | |
2960 | case elfcpp::R_PPC64_TOC16_LO_DS: | |
2961 | // Absolute in GOT. | |
2962 | return Symbol::ABSOLUTE_REF; | |
2963 | ||
2964 | case elfcpp::R_POWERPC_GOT_TPREL16: | |
2965 | case elfcpp::R_POWERPC_TLS: | |
2966 | return Symbol::TLS_REF; | |
2967 | ||
2968 | case elfcpp::R_POWERPC_COPY: | |
2969 | case elfcpp::R_POWERPC_GLOB_DAT: | |
2970 | case elfcpp::R_POWERPC_JMP_SLOT: | |
2971 | case elfcpp::R_POWERPC_RELATIVE: | |
2972 | case elfcpp::R_POWERPC_DTPMOD: | |
2973 | default: | |
2974 | // Not expected. We will give an error later. | |
2975 | return 0; | |
2976 | } | |
2977 | } | |
2978 | ||
42cacb20 DE |
2979 | // Report an unsupported relocation against a local symbol. |
2980 | ||
2981 | template<int size, bool big_endian> | |
2982 | void | |
2983 | Target_powerpc<size, big_endian>::Scan::unsupported_reloc_local( | |
d83ce4e3 AM |
2984 | Sized_relobj_file<size, big_endian>* object, |
2985 | unsigned int r_type) | |
42cacb20 DE |
2986 | { |
2987 | gold_error(_("%s: unsupported reloc %u against local symbol"), | |
2988 | object->name().c_str(), r_type); | |
2989 | } | |
2990 | ||
2991 | // We are about to emit a dynamic relocation of type R_TYPE. If the | |
2992 | // dynamic linker does not support it, issue an error. | |
2993 | ||
2994 | template<int size, bool big_endian> | |
2995 | void | |
2996 | Target_powerpc<size, big_endian>::Scan::check_non_pic(Relobj* object, | |
2997 | unsigned int r_type) | |
2998 | { | |
2999 | gold_assert(r_type != elfcpp::R_POWERPC_NONE); | |
3000 | ||
3001 | // These are the relocation types supported by glibc for both 32-bit | |
3002 | // and 64-bit powerpc. | |
3003 | switch (r_type) | |
3004 | { | |
3ea0a085 | 3005 | case elfcpp::R_POWERPC_NONE: |
42cacb20 DE |
3006 | case elfcpp::R_POWERPC_RELATIVE: |
3007 | case elfcpp::R_POWERPC_GLOB_DAT: | |
3008 | case elfcpp::R_POWERPC_DTPMOD: | |
3009 | case elfcpp::R_POWERPC_DTPREL: | |
3010 | case elfcpp::R_POWERPC_TPREL: | |
3011 | case elfcpp::R_POWERPC_JMP_SLOT: | |
3012 | case elfcpp::R_POWERPC_COPY: | |
3ea0a085 | 3013 | case elfcpp::R_POWERPC_IRELATIVE: |
42cacb20 | 3014 | case elfcpp::R_POWERPC_ADDR32: |
3ea0a085 | 3015 | case elfcpp::R_POWERPC_UADDR32: |
42cacb20 | 3016 | case elfcpp::R_POWERPC_ADDR24: |
3ea0a085 AM |
3017 | case elfcpp::R_POWERPC_ADDR16: |
3018 | case elfcpp::R_POWERPC_UADDR16: | |
3019 | case elfcpp::R_POWERPC_ADDR16_LO: | |
3020 | case elfcpp::R_POWERPC_ADDR16_HI: | |
3021 | case elfcpp::R_POWERPC_ADDR16_HA: | |
3022 | case elfcpp::R_POWERPC_ADDR14: | |
3023 | case elfcpp::R_POWERPC_ADDR14_BRTAKEN: | |
3024 | case elfcpp::R_POWERPC_ADDR14_BRNTAKEN: | |
3025 | case elfcpp::R_POWERPC_REL32: | |
42cacb20 | 3026 | case elfcpp::R_POWERPC_REL24: |
3ea0a085 AM |
3027 | case elfcpp::R_POWERPC_TPREL16: |
3028 | case elfcpp::R_POWERPC_TPREL16_LO: | |
3029 | case elfcpp::R_POWERPC_TPREL16_HI: | |
3030 | case elfcpp::R_POWERPC_TPREL16_HA: | |
42cacb20 DE |
3031 | return; |
3032 | ||
3033 | default: | |
3034 | break; | |
3035 | } | |
3036 | ||
3037 | if (size == 64) | |
3038 | { | |
3039 | switch (r_type) | |
3040 | { | |
3041 | // These are the relocation types supported only on 64-bit. | |
3042 | case elfcpp::R_PPC64_ADDR64: | |
42cacb20 | 3043 | case elfcpp::R_PPC64_UADDR64: |
3ea0a085 | 3044 | case elfcpp::R_PPC64_JMP_IREL: |
42cacb20 | 3045 | case elfcpp::R_PPC64_ADDR16_DS: |
3ea0a085 | 3046 | case elfcpp::R_PPC64_ADDR16_LO_DS: |
42cacb20 DE |
3047 | case elfcpp::R_PPC64_ADDR16_HIGHER: |
3048 | case elfcpp::R_PPC64_ADDR16_HIGHEST: | |
3049 | case elfcpp::R_PPC64_ADDR16_HIGHERA: | |
3050 | case elfcpp::R_PPC64_ADDR16_HIGHESTA: | |
42cacb20 | 3051 | case elfcpp::R_PPC64_REL64: |
3ea0a085 AM |
3052 | case elfcpp::R_POWERPC_ADDR30: |
3053 | case elfcpp::R_PPC64_TPREL16_DS: | |
3054 | case elfcpp::R_PPC64_TPREL16_LO_DS: | |
3055 | case elfcpp::R_PPC64_TPREL16_HIGHER: | |
3056 | case elfcpp::R_PPC64_TPREL16_HIGHEST: | |
3057 | case elfcpp::R_PPC64_TPREL16_HIGHERA: | |
3058 | case elfcpp::R_PPC64_TPREL16_HIGHESTA: | |
42cacb20 DE |
3059 | return; |
3060 | ||
3061 | default: | |
3062 | break; | |
3063 | } | |
3064 | } | |
3065 | else | |
3066 | { | |
3067 | switch (r_type) | |
3068 | { | |
3069 | // These are the relocation types supported only on 32-bit. | |
3ea0a085 AM |
3070 | // ??? glibc ld.so doesn't need to support these. |
3071 | case elfcpp::R_POWERPC_DTPREL16: | |
3072 | case elfcpp::R_POWERPC_DTPREL16_LO: | |
3073 | case elfcpp::R_POWERPC_DTPREL16_HI: | |
3074 | case elfcpp::R_POWERPC_DTPREL16_HA: | |
3075 | return; | |
42cacb20 DE |
3076 | |
3077 | default: | |
3078 | break; | |
3079 | } | |
3080 | } | |
3081 | ||
3082 | // This prevents us from issuing more than one error per reloc | |
3083 | // section. But we can still wind up issuing more than one | |
3084 | // error per object file. | |
3085 | if (this->issued_non_pic_error_) | |
3086 | return; | |
33aea2fd | 3087 | gold_assert(parameters->options().output_is_position_independent()); |
42cacb20 DE |
3088 | object->error(_("requires unsupported dynamic reloc; " |
3089 | "recompile with -fPIC")); | |
3090 | this->issued_non_pic_error_ = true; | |
3091 | return; | |
3092 | } | |
3093 | ||
e5d5f5ed AM |
3094 | // Return whether we need to make a PLT entry for a relocation of the |
3095 | // given type against a STT_GNU_IFUNC symbol. | |
3096 | ||
3097 | template<int size, bool big_endian> | |
3098 | bool | |
3099 | Target_powerpc<size, big_endian>::Scan::reloc_needs_plt_for_ifunc( | |
3100 | Sized_relobj_file<size, big_endian>* object, | |
3101 | unsigned int r_type) | |
3102 | { | |
c9824451 AM |
3103 | // In non-pic code any reference will resolve to the plt call stub |
3104 | // for the ifunc symbol. | |
3105 | if (size == 32 && !parameters->options().output_is_position_independent()) | |
3106 | return true; | |
3107 | ||
e5d5f5ed AM |
3108 | switch (r_type) |
3109 | { | |
3110 | // Word size refs from data sections are OK. | |
3111 | case elfcpp::R_POWERPC_ADDR32: | |
3112 | case elfcpp::R_POWERPC_UADDR32: | |
3113 | if (size == 32) | |
3114 | return true; | |
3115 | break; | |
3116 | ||
3117 | case elfcpp::R_PPC64_ADDR64: | |
3118 | case elfcpp::R_PPC64_UADDR64: | |
3119 | if (size == 64) | |
3120 | return true; | |
3121 | break; | |
3122 | ||
3123 | // GOT refs are good. | |
3124 | case elfcpp::R_POWERPC_GOT16: | |
3125 | case elfcpp::R_POWERPC_GOT16_LO: | |
3126 | case elfcpp::R_POWERPC_GOT16_HI: | |
3127 | case elfcpp::R_POWERPC_GOT16_HA: | |
3128 | case elfcpp::R_PPC64_GOT16_DS: | |
3129 | case elfcpp::R_PPC64_GOT16_LO_DS: | |
3130 | return true; | |
3131 | ||
3132 | // So are function calls. | |
3133 | case elfcpp::R_POWERPC_ADDR24: | |
3134 | case elfcpp::R_POWERPC_ADDR14: | |
3135 | case elfcpp::R_POWERPC_ADDR14_BRTAKEN: | |
3136 | case elfcpp::R_POWERPC_ADDR14_BRNTAKEN: | |
3137 | case elfcpp::R_POWERPC_REL24: | |
3138 | case elfcpp::R_PPC_PLTREL24: | |
3139 | case elfcpp::R_POWERPC_REL14: | |
3140 | case elfcpp::R_POWERPC_REL14_BRTAKEN: | |
3141 | case elfcpp::R_POWERPC_REL14_BRNTAKEN: | |
3142 | return true; | |
3143 | ||
3144 | default: | |
3145 | break; | |
3146 | } | |
3147 | ||
3148 | // Anything else is a problem. | |
3149 | // If we are building a static executable, the libc startup function | |
3150 | // responsible for applying indirect function relocations is going | |
3151 | // to complain about the reloc type. | |
3152 | // If we are building a dynamic executable, we will have a text | |
3153 | // relocation. The dynamic loader will set the text segment | |
3154 | // writable and non-executable to apply text relocations. So we'll | |
3155 | // segfault when trying to run the indirection function to resolve | |
3156 | // the reloc. | |
3157 | gold_error(_("%s: unsupported reloc %u for IFUNC symbol"), | |
3158 | object->name().c_str(), r_type); | |
3159 | return false; | |
3160 | } | |
3161 | ||
42cacb20 DE |
3162 | // Scan a relocation for a local symbol. |
3163 | ||
3164 | template<int size, bool big_endian> | |
3165 | inline void | |
3166 | Target_powerpc<size, big_endian>::Scan::local( | |
d83ce4e3 AM |
3167 | Symbol_table* symtab, |
3168 | Layout* layout, | |
3169 | Target_powerpc<size, big_endian>* target, | |
3170 | Sized_relobj_file<size, big_endian>* object, | |
3171 | unsigned int data_shndx, | |
3172 | Output_section* output_section, | |
3173 | const elfcpp::Rela<size, big_endian>& reloc, | |
3174 | unsigned int r_type, | |
e5d5f5ed | 3175 | const elfcpp::Sym<size, big_endian>& lsym, |
bfdfa4cd | 3176 | bool is_discarded) |
42cacb20 | 3177 | { |
dd93cd0a AM |
3178 | Powerpc_relobj<size, big_endian>* ppc_object |
3179 | = static_cast<Powerpc_relobj<size, big_endian>*>(object); | |
3180 | ||
bfdfa4cd AM |
3181 | if (is_discarded) |
3182 | { | |
3183 | if (size == 64 | |
3184 | && data_shndx == ppc_object->opd_shndx() | |
3185 | && r_type == elfcpp::R_PPC64_ADDR64) | |
3186 | ppc_object->set_opd_discard(reloc.get_r_offset()); | |
3187 | return; | |
3188 | } | |
3189 | ||
e5d5f5ed AM |
3190 | // A local STT_GNU_IFUNC symbol may require a PLT entry. |
3191 | bool is_ifunc = lsym.get_st_type() == elfcpp::STT_GNU_IFUNC; | |
3192 | if (is_ifunc && this->reloc_needs_plt_for_ifunc(object, r_type)) | |
c9824451 | 3193 | target->make_local_ifunc_plt_entry(layout, reloc, object); |
e5d5f5ed | 3194 | |
42cacb20 DE |
3195 | switch (r_type) |
3196 | { | |
3197 | case elfcpp::R_POWERPC_NONE: | |
3198 | case elfcpp::R_POWERPC_GNU_VTINHERIT: | |
3199 | case elfcpp::R_POWERPC_GNU_VTENTRY: | |
6ce78956 | 3200 | case elfcpp::R_PPC64_TOCSAVE: |
dd93cd0a | 3201 | case elfcpp::R_PPC_EMB_MRKREF: |
7404fe1b | 3202 | case elfcpp::R_POWERPC_TLS: |
dd93cd0a AM |
3203 | break; |
3204 | ||
3205 | case elfcpp::R_PPC64_TOC: | |
3206 | { | |
3207 | Output_data_got_powerpc<size, big_endian>* got | |
3208 | = target->got_section(symtab, layout); | |
3209 | if (parameters->options().output_is_position_independent()) | |
3210 | { | |
bfdfa4cd AM |
3211 | Address off = reloc.get_r_offset(); |
3212 | if (size == 64 | |
3213 | && data_shndx == ppc_object->opd_shndx() | |
3214 | && ppc_object->get_opd_discard(off - 8)) | |
3215 | break; | |
3216 | ||
dd93cd0a | 3217 | Reloc_section* rela_dyn = target->rela_dyn_section(layout); |
bfdfa4cd | 3218 | Powerpc_relobj<size, big_endian>* symobj = ppc_object; |
dd93cd0a AM |
3219 | rela_dyn->add_output_section_relative(got->output_section(), |
3220 | elfcpp::R_POWERPC_RELATIVE, | |
3221 | output_section, | |
bfdfa4cd AM |
3222 | object, data_shndx, off, |
3223 | symobj->toc_base_offset()); | |
dd93cd0a AM |
3224 | } |
3225 | } | |
42cacb20 DE |
3226 | break; |
3227 | ||
3228 | case elfcpp::R_PPC64_ADDR64: | |
dd93cd0a | 3229 | case elfcpp::R_PPC64_UADDR64: |
42cacb20 | 3230 | case elfcpp::R_POWERPC_ADDR32: |
dd93cd0a AM |
3231 | case elfcpp::R_POWERPC_UADDR32: |
3232 | case elfcpp::R_POWERPC_ADDR24: | |
c9269dff | 3233 | case elfcpp::R_POWERPC_ADDR16: |
42cacb20 | 3234 | case elfcpp::R_POWERPC_ADDR16_LO: |
c9269dff AM |
3235 | case elfcpp::R_POWERPC_ADDR16_HI: |
3236 | case elfcpp::R_POWERPC_ADDR16_HA: | |
dd93cd0a AM |
3237 | case elfcpp::R_POWERPC_UADDR16: |
3238 | case elfcpp::R_PPC64_ADDR16_HIGHER: | |
3239 | case elfcpp::R_PPC64_ADDR16_HIGHERA: | |
3240 | case elfcpp::R_PPC64_ADDR16_HIGHEST: | |
3241 | case elfcpp::R_PPC64_ADDR16_HIGHESTA: | |
3242 | case elfcpp::R_PPC64_ADDR16_DS: | |
3243 | case elfcpp::R_PPC64_ADDR16_LO_DS: | |
3244 | case elfcpp::R_POWERPC_ADDR14: | |
3245 | case elfcpp::R_POWERPC_ADDR14_BRTAKEN: | |
3246 | case elfcpp::R_POWERPC_ADDR14_BRNTAKEN: | |
42cacb20 DE |
3247 | // If building a shared library (or a position-independent |
3248 | // executable), we need to create a dynamic relocation for | |
3249 | // this location. | |
c9824451 AM |
3250 | if (parameters->options().output_is_position_independent() |
3251 | || (size == 64 && is_ifunc)) | |
2e702c99 RM |
3252 | { |
3253 | Reloc_section* rela_dyn = target->rela_dyn_section(layout); | |
42cacb20 | 3254 | |
dd93cd0a AM |
3255 | if ((size == 32 && r_type == elfcpp::R_POWERPC_ADDR32) |
3256 | || (size == 64 && r_type == elfcpp::R_PPC64_ADDR64)) | |
2e702c99 RM |
3257 | { |
3258 | unsigned int r_sym = elfcpp::elf_r_sym<size>(reloc.get_r_info()); | |
e5d5f5ed AM |
3259 | unsigned int dynrel = elfcpp::R_POWERPC_RELATIVE; |
3260 | if (is_ifunc) | |
3261 | { | |
3262 | rela_dyn = target->iplt_section()->rel_plt(); | |
3263 | dynrel = elfcpp::R_POWERPC_IRELATIVE; | |
3264 | } | |
3265 | rela_dyn->add_local_relative(object, r_sym, dynrel, | |
dd93cd0a AM |
3266 | output_section, data_shndx, |
3267 | reloc.get_r_offset(), | |
c9824451 | 3268 | reloc.get_r_addend(), false); |
2e702c99 RM |
3269 | } |
3270 | else | |
3271 | { | |
dd93cd0a | 3272 | check_non_pic(object, r_type); |
42cacb20 | 3273 | unsigned int r_sym = elfcpp::elf_r_sym<size>(reloc.get_r_info()); |
dd93cd0a AM |
3274 | rela_dyn->add_local(object, r_sym, r_type, output_section, |
3275 | data_shndx, reloc.get_r_offset(), | |
3276 | reloc.get_r_addend()); | |
2e702c99 RM |
3277 | } |
3278 | } | |
42cacb20 DE |
3279 | break; |
3280 | ||
3ea0a085 | 3281 | case elfcpp::R_PPC64_REL64: |
dd93cd0a | 3282 | case elfcpp::R_POWERPC_REL32: |
42cacb20 | 3283 | case elfcpp::R_POWERPC_REL24: |
c9824451 | 3284 | case elfcpp::R_PPC_PLTREL24: |
42cacb20 | 3285 | case elfcpp::R_PPC_LOCAL24PC: |
dd93cd0a | 3286 | case elfcpp::R_POWERPC_REL16: |
6ce78956 | 3287 | case elfcpp::R_POWERPC_REL16_LO: |
dd93cd0a | 3288 | case elfcpp::R_POWERPC_REL16_HI: |
6ce78956 | 3289 | case elfcpp::R_POWERPC_REL16_HA: |
dd93cd0a AM |
3290 | case elfcpp::R_POWERPC_REL14: |
3291 | case elfcpp::R_POWERPC_REL14_BRTAKEN: | |
3292 | case elfcpp::R_POWERPC_REL14_BRNTAKEN: | |
3293 | case elfcpp::R_POWERPC_SECTOFF: | |
3294 | case elfcpp::R_POWERPC_TPREL16: | |
3295 | case elfcpp::R_POWERPC_DTPREL16: | |
3296 | case elfcpp::R_POWERPC_SECTOFF_LO: | |
3297 | case elfcpp::R_POWERPC_TPREL16_LO: | |
3298 | case elfcpp::R_POWERPC_DTPREL16_LO: | |
3299 | case elfcpp::R_POWERPC_SECTOFF_HI: | |
3300 | case elfcpp::R_POWERPC_TPREL16_HI: | |
3301 | case elfcpp::R_POWERPC_DTPREL16_HI: | |
3302 | case elfcpp::R_POWERPC_SECTOFF_HA: | |
3303 | case elfcpp::R_POWERPC_TPREL16_HA: | |
3304 | case elfcpp::R_POWERPC_DTPREL16_HA: | |
3305 | case elfcpp::R_PPC64_DTPREL16_HIGHER: | |
3306 | case elfcpp::R_PPC64_TPREL16_HIGHER: | |
3307 | case elfcpp::R_PPC64_DTPREL16_HIGHERA: | |
3308 | case elfcpp::R_PPC64_TPREL16_HIGHERA: | |
3309 | case elfcpp::R_PPC64_DTPREL16_HIGHEST: | |
3310 | case elfcpp::R_PPC64_TPREL16_HIGHEST: | |
3311 | case elfcpp::R_PPC64_DTPREL16_HIGHESTA: | |
3312 | case elfcpp::R_PPC64_TPREL16_HIGHESTA: | |
3313 | case elfcpp::R_PPC64_TPREL16_DS: | |
3314 | case elfcpp::R_PPC64_TPREL16_LO_DS: | |
3315 | case elfcpp::R_PPC64_DTPREL16_DS: | |
3316 | case elfcpp::R_PPC64_DTPREL16_LO_DS: | |
3317 | case elfcpp::R_PPC64_SECTOFF_DS: | |
3318 | case elfcpp::R_PPC64_SECTOFF_LO_DS: | |
3319 | case elfcpp::R_PPC64_TLSGD: | |
3320 | case elfcpp::R_PPC64_TLSLD: | |
42cacb20 DE |
3321 | break; |
3322 | ||
3323 | case elfcpp::R_POWERPC_GOT16: | |
3324 | case elfcpp::R_POWERPC_GOT16_LO: | |
3325 | case elfcpp::R_POWERPC_GOT16_HI: | |
3326 | case elfcpp::R_POWERPC_GOT16_HA: | |
dd93cd0a AM |
3327 | case elfcpp::R_PPC64_GOT16_DS: |
3328 | case elfcpp::R_PPC64_GOT16_LO_DS: | |
42cacb20 | 3329 | { |
c9269dff | 3330 | // The symbol requires a GOT entry. |
dd93cd0a AM |
3331 | Output_data_got_powerpc<size, big_endian>* got |
3332 | = target->got_section(symtab, layout); | |
3333 | unsigned int r_sym = elfcpp::elf_r_sym<size>(reloc.get_r_info()); | |
42cacb20 | 3334 | |
e5d5f5ed | 3335 | if (!parameters->options().output_is_position_independent()) |
42cacb20 | 3336 | { |
e5d5f5ed AM |
3337 | if (size == 32 && is_ifunc) |
3338 | got->add_local_plt(object, r_sym, GOT_TYPE_STANDARD); | |
3339 | else | |
3340 | got->add_local(object, r_sym, GOT_TYPE_STANDARD); | |
3341 | } | |
3342 | else if (!object->local_has_got_offset(r_sym, GOT_TYPE_STANDARD)) | |
3343 | { | |
3344 | // If we are generating a shared object or a pie, this | |
3345 | // symbol's GOT entry will be set by a dynamic relocation. | |
3346 | unsigned int off; | |
3347 | off = got->add_constant(0); | |
3348 | object->set_local_got_offset(r_sym, GOT_TYPE_STANDARD, off); | |
42cacb20 | 3349 | |
e5d5f5ed AM |
3350 | Reloc_section* rela_dyn = target->rela_dyn_section(layout); |
3351 | unsigned int dynrel = elfcpp::R_POWERPC_RELATIVE; | |
3352 | if (is_ifunc) | |
3353 | { | |
3354 | rela_dyn = target->iplt_section()->rel_plt(); | |
3355 | dynrel = elfcpp::R_POWERPC_IRELATIVE; | |
42cacb20 | 3356 | } |
e5d5f5ed | 3357 | rela_dyn->add_local_relative(object, r_sym, dynrel, |
c9824451 | 3358 | got, off, 0, false); |
2e702c99 | 3359 | } |
42cacb20 DE |
3360 | } |
3361 | break; | |
3362 | ||
cf43a2fe AM |
3363 | case elfcpp::R_PPC64_TOC16: |
3364 | case elfcpp::R_PPC64_TOC16_LO: | |
3365 | case elfcpp::R_PPC64_TOC16_HI: | |
3366 | case elfcpp::R_PPC64_TOC16_HA: | |
3367 | case elfcpp::R_PPC64_TOC16_DS: | |
3368 | case elfcpp::R_PPC64_TOC16_LO_DS: | |
42cacb20 DE |
3369 | // We need a GOT section. |
3370 | target->got_section(symtab, layout); | |
3371 | break; | |
3372 | ||
dd93cd0a AM |
3373 | case elfcpp::R_POWERPC_GOT_TLSGD16: |
3374 | case elfcpp::R_POWERPC_GOT_TLSGD16_LO: | |
3375 | case elfcpp::R_POWERPC_GOT_TLSGD16_HI: | |
3376 | case elfcpp::R_POWERPC_GOT_TLSGD16_HA: | |
3377 | { | |
3378 | const tls::Tls_optimization tls_type = target->optimize_tls_gd(true); | |
3379 | if (tls_type == tls::TLSOPT_NONE) | |
3380 | { | |
3381 | Output_data_got_powerpc<size, big_endian>* got | |
3382 | = target->got_section(symtab, layout); | |
3383 | unsigned int r_sym = elfcpp::elf_r_sym<size>(reloc.get_r_info()); | |
bd73a62d AM |
3384 | Reloc_section* rela_dyn = target->rela_dyn_section(layout); |
3385 | got->add_local_tls_pair(object, r_sym, GOT_TYPE_TLSGD, | |
3386 | rela_dyn, elfcpp::R_POWERPC_DTPMOD); | |
dd93cd0a AM |
3387 | } |
3388 | else if (tls_type == tls::TLSOPT_TO_LE) | |
3389 | { | |
3390 | // no GOT relocs needed for Local Exec. | |
3391 | } | |
3392 | else | |
3393 | gold_unreachable(); | |
3394 | } | |
42cacb20 DE |
3395 | break; |
3396 | ||
dd93cd0a AM |
3397 | case elfcpp::R_POWERPC_GOT_TLSLD16: |
3398 | case elfcpp::R_POWERPC_GOT_TLSLD16_LO: | |
3399 | case elfcpp::R_POWERPC_GOT_TLSLD16_HI: | |
3400 | case elfcpp::R_POWERPC_GOT_TLSLD16_HA: | |
3401 | { | |
3402 | const tls::Tls_optimization tls_type = target->optimize_tls_ld(); | |
3403 | if (tls_type == tls::TLSOPT_NONE) | |
3404 | target->tlsld_got_offset(symtab, layout, object); | |
3405 | else if (tls_type == tls::TLSOPT_TO_LE) | |
3406 | { | |
3407 | // no GOT relocs needed for Local Exec. | |
7404fe1b AM |
3408 | if (parameters->options().emit_relocs()) |
3409 | { | |
3410 | Output_section* os = layout->tls_segment()->first_section(); | |
3411 | gold_assert(os != NULL); | |
3412 | os->set_needs_symtab_index(); | |
3413 | } | |
dd93cd0a AM |
3414 | } |
3415 | else | |
3416 | gold_unreachable(); | |
3417 | } | |
42cacb20 | 3418 | break; |
42cacb20 | 3419 | |
dd93cd0a AM |
3420 | case elfcpp::R_POWERPC_GOT_DTPREL16: |
3421 | case elfcpp::R_POWERPC_GOT_DTPREL16_LO: | |
3422 | case elfcpp::R_POWERPC_GOT_DTPREL16_HI: | |
3423 | case elfcpp::R_POWERPC_GOT_DTPREL16_HA: | |
3424 | { | |
3425 | Output_data_got_powerpc<size, big_endian>* got | |
3426 | = target->got_section(symtab, layout); | |
3427 | unsigned int r_sym = elfcpp::elf_r_sym<size>(reloc.get_r_info()); | |
bd73a62d | 3428 | got->add_local_tls(object, r_sym, GOT_TYPE_DTPREL); |
dd93cd0a AM |
3429 | } |
3430 | break; | |
42cacb20 | 3431 | |
dd93cd0a AM |
3432 | case elfcpp::R_POWERPC_GOT_TPREL16: |
3433 | case elfcpp::R_POWERPC_GOT_TPREL16_LO: | |
3434 | case elfcpp::R_POWERPC_GOT_TPREL16_HI: | |
3435 | case elfcpp::R_POWERPC_GOT_TPREL16_HA: | |
3436 | { | |
3437 | const tls::Tls_optimization tls_type = target->optimize_tls_ie(true); | |
3438 | if (tls_type == tls::TLSOPT_NONE) | |
3439 | { | |
dd93cd0a | 3440 | unsigned int r_sym = elfcpp::elf_r_sym<size>(reloc.get_r_info()); |
acc276d8 AM |
3441 | if (!object->local_has_got_offset(r_sym, GOT_TYPE_TPREL)) |
3442 | { | |
3443 | Output_data_got_powerpc<size, big_endian>* got | |
3444 | = target->got_section(symtab, layout); | |
3445 | unsigned int off = got->add_constant(0); | |
3446 | object->set_local_got_offset(r_sym, GOT_TYPE_TPREL, off); | |
3447 | ||
3448 | Reloc_section* rela_dyn = target->rela_dyn_section(layout); | |
3449 | rela_dyn->add_symbolless_local_addend(object, r_sym, | |
3450 | elfcpp::R_POWERPC_TPREL, | |
3451 | got, off, 0); | |
3452 | } | |
dd93cd0a AM |
3453 | } |
3454 | else if (tls_type == tls::TLSOPT_TO_LE) | |
3455 | { | |
3456 | // no GOT relocs needed for Local Exec. | |
3457 | } | |
3458 | else | |
3459 | gold_unreachable(); | |
3460 | } | |
3461 | break; | |
3462 | ||
3463 | default: | |
3464 | unsupported_reloc_local(object, r_type); | |
3465 | break; | |
3466 | } | |
3467 | } | |
3468 | ||
3469 | // Report an unsupported relocation against a global symbol. | |
3470 | ||
3471 | template<int size, bool big_endian> | |
3472 | void | |
3473 | Target_powerpc<size, big_endian>::Scan::unsupported_reloc_global( | |
3474 | Sized_relobj_file<size, big_endian>* object, | |
3475 | unsigned int r_type, | |
3476 | Symbol* gsym) | |
3477 | { | |
42cacb20 DE |
3478 | gold_error(_("%s: unsupported reloc %u against global symbol %s"), |
3479 | object->name().c_str(), r_type, gsym->demangled_name().c_str()); | |
3480 | } | |
3481 | ||
3482 | // Scan a relocation for a global symbol. | |
3483 | ||
3484 | template<int size, bool big_endian> | |
3485 | inline void | |
3486 | Target_powerpc<size, big_endian>::Scan::global( | |
d83ce4e3 AM |
3487 | Symbol_table* symtab, |
3488 | Layout* layout, | |
3489 | Target_powerpc<size, big_endian>* target, | |
3490 | Sized_relobj_file<size, big_endian>* object, | |
3491 | unsigned int data_shndx, | |
3492 | Output_section* output_section, | |
3493 | const elfcpp::Rela<size, big_endian>& reloc, | |
3494 | unsigned int r_type, | |
3495 | Symbol* gsym) | |
42cacb20 | 3496 | { |
dd93cd0a AM |
3497 | Powerpc_relobj<size, big_endian>* ppc_object |
3498 | = static_cast<Powerpc_relobj<size, big_endian>*>(object); | |
3499 | ||
e5d5f5ed AM |
3500 | // A STT_GNU_IFUNC symbol may require a PLT entry. |
3501 | if (gsym->type() == elfcpp::STT_GNU_IFUNC | |
3502 | && this->reloc_needs_plt_for_ifunc(object, r_type)) | |
c9824451 | 3503 | target->make_plt_entry(layout, gsym, reloc, object); |
e5d5f5ed | 3504 | |
42cacb20 DE |
3505 | switch (r_type) |
3506 | { | |
3507 | case elfcpp::R_POWERPC_NONE: | |
3508 | case elfcpp::R_POWERPC_GNU_VTINHERIT: | |
3509 | case elfcpp::R_POWERPC_GNU_VTENTRY: | |
cf43a2fe | 3510 | case elfcpp::R_PPC_LOCAL24PC: |
dd93cd0a | 3511 | case elfcpp::R_PPC_EMB_MRKREF: |
7404fe1b | 3512 | case elfcpp::R_POWERPC_TLS: |
dd93cd0a AM |
3513 | break; |
3514 | ||
3515 | case elfcpp::R_PPC64_TOC: | |
3516 | { | |
3517 | Output_data_got_powerpc<size, big_endian>* got | |
3518 | = target->got_section(symtab, layout); | |
3519 | if (parameters->options().output_is_position_independent()) | |
3520 | { | |
bfdfa4cd AM |
3521 | Address off = reloc.get_r_offset(); |
3522 | if (size == 64 | |
3523 | && data_shndx == ppc_object->opd_shndx() | |
3524 | && ppc_object->get_opd_discard(off - 8)) | |
3525 | break; | |
3526 | ||
dd93cd0a AM |
3527 | Reloc_section* rela_dyn = target->rela_dyn_section(layout); |
3528 | Powerpc_relobj<size, big_endian>* symobj = ppc_object; | |
3529 | if (data_shndx != ppc_object->opd_shndx()) | |
3530 | symobj = static_cast | |
3531 | <Powerpc_relobj<size, big_endian>*>(gsym->object()); | |
3532 | rela_dyn->add_output_section_relative(got->output_section(), | |
3533 | elfcpp::R_POWERPC_RELATIVE, | |
3534 | output_section, | |
bfdfa4cd | 3535 | object, data_shndx, off, |
dd93cd0a AM |
3536 | symobj->toc_base_offset()); |
3537 | } | |
3538 | } | |
42cacb20 DE |
3539 | break; |
3540 | ||
c9269dff | 3541 | case elfcpp::R_PPC64_ADDR64: |
bfdfa4cd AM |
3542 | if (size == 64 |
3543 | && data_shndx == ppc_object->opd_shndx() | |
3544 | && (gsym->is_defined_in_discarded_section() | |
3545 | || gsym->object() != object)) | |
3546 | { | |
3547 | ppc_object->set_opd_discard(reloc.get_r_offset()); | |
3548 | break; | |
3549 | } | |
3550 | // Fall thru | |
dd93cd0a | 3551 | case elfcpp::R_PPC64_UADDR64: |
c9269dff | 3552 | case elfcpp::R_POWERPC_ADDR32: |
dd93cd0a AM |
3553 | case elfcpp::R_POWERPC_UADDR32: |
3554 | case elfcpp::R_POWERPC_ADDR24: | |
42cacb20 DE |
3555 | case elfcpp::R_POWERPC_ADDR16: |
3556 | case elfcpp::R_POWERPC_ADDR16_LO: | |
3557 | case elfcpp::R_POWERPC_ADDR16_HI: | |
3558 | case elfcpp::R_POWERPC_ADDR16_HA: | |
dd93cd0a AM |
3559 | case elfcpp::R_POWERPC_UADDR16: |
3560 | case elfcpp::R_PPC64_ADDR16_HIGHER: | |
3561 | case elfcpp::R_PPC64_ADDR16_HIGHERA: | |
3562 | case elfcpp::R_PPC64_ADDR16_HIGHEST: | |
3563 | case elfcpp::R_PPC64_ADDR16_HIGHESTA: | |
3564 | case elfcpp::R_PPC64_ADDR16_DS: | |
3565 | case elfcpp::R_PPC64_ADDR16_LO_DS: | |
3566 | case elfcpp::R_POWERPC_ADDR14: | |
3567 | case elfcpp::R_POWERPC_ADDR14_BRTAKEN: | |
3568 | case elfcpp::R_POWERPC_ADDR14_BRNTAKEN: | |
42cacb20 | 3569 | { |
c9269dff AM |
3570 | // Make a PLT entry if necessary. |
3571 | if (gsym->needs_plt_entry()) | |
3572 | { | |
c9824451 | 3573 | target->make_plt_entry(layout, gsym, reloc, 0); |
2e702c99 RM |
3574 | // Since this is not a PC-relative relocation, we may be |
3575 | // taking the address of a function. In that case we need to | |
3576 | // set the entry in the dynamic symbol table to the address of | |
e5d5f5ed | 3577 | // the PLT call stub. |
cf43a2fe | 3578 | if (size == 32 |
e5d5f5ed AM |
3579 | && gsym->is_from_dynobj() |
3580 | && !parameters->options().output_is_position_independent()) | |
2e702c99 | 3581 | gsym->set_needs_dynsym_value(); |
c9269dff AM |
3582 | } |
3583 | // Make a dynamic relocation if necessary. | |
c9824451 AM |
3584 | if (needs_dynamic_reloc<size>(gsym, Scan::get_reference_flags(r_type)) |
3585 | || (size == 64 && gsym->type() == elfcpp::STT_GNU_IFUNC)) | |
c9269dff AM |
3586 | { |
3587 | if (gsym->may_need_copy_reloc()) | |
3588 | { | |
3589 | target->copy_reloc(symtab, layout, object, | |
3590 | data_shndx, output_section, gsym, reloc); | |
3591 | } | |
dd93cd0a AM |
3592 | else if (((size == 32 && r_type == elfcpp::R_POWERPC_ADDR32) |
3593 | || (size == 64 && r_type == elfcpp::R_PPC64_ADDR64)) | |
3594 | && (gsym->can_use_relative_reloc(false) | |
e5d5f5ed AM |
3595 | || (size == 64 |
3596 | && data_shndx == ppc_object->opd_shndx()))) | |
2e702c99 RM |
3597 | { |
3598 | Reloc_section* rela_dyn = target->rela_dyn_section(layout); | |
e5d5f5ed AM |
3599 | unsigned int dynrel = elfcpp::R_POWERPC_RELATIVE; |
3600 | if (gsym->type() == elfcpp::STT_GNU_IFUNC) | |
3601 | { | |
3602 | rela_dyn = target->iplt_section()->rel_plt(); | |
3603 | dynrel = elfcpp::R_POWERPC_IRELATIVE; | |
3604 | } | |
3605 | rela_dyn->add_symbolless_global_addend( | |
3606 | gsym, dynrel, output_section, object, data_shndx, | |
3607 | reloc.get_r_offset(), reloc.get_r_addend()); | |
2e702c99 RM |
3608 | } |
3609 | else | |
3610 | { | |
3611 | Reloc_section* rela_dyn = target->rela_dyn_section(layout); | |
42cacb20 | 3612 | check_non_pic(object, r_type); |
dd93cd0a AM |
3613 | rela_dyn->add_global(gsym, r_type, output_section, |
3614 | object, data_shndx, | |
3615 | reloc.get_r_offset(), | |
3616 | reloc.get_r_addend()); | |
2e702c99 RM |
3617 | } |
3618 | } | |
42cacb20 DE |
3619 | } |
3620 | break; | |
3621 | ||
cf43a2fe | 3622 | case elfcpp::R_PPC_PLTREL24: |
42cacb20 | 3623 | case elfcpp::R_POWERPC_REL24: |
3ea0a085 AM |
3624 | if (gsym->needs_plt_entry() |
3625 | || (!gsym->final_value_is_known() | |
3626 | && (gsym->is_undefined() | |
3627 | || gsym->is_from_dynobj() | |
3628 | || gsym->is_preemptible()))) | |
c9824451 | 3629 | target->make_plt_entry(layout, gsym, reloc, object); |
3ea0a085 | 3630 | // Fall thru |
42cacb20 | 3631 | |
3ea0a085 | 3632 | case elfcpp::R_PPC64_REL64: |
dd93cd0a | 3633 | case elfcpp::R_POWERPC_REL32: |
3ea0a085 AM |
3634 | // Make a dynamic relocation if necessary. |
3635 | if (needs_dynamic_reloc<size>(gsym, Scan::get_reference_flags(r_type))) | |
3636 | { | |
3637 | if (gsym->may_need_copy_reloc()) | |
3638 | { | |
3639 | target->copy_reloc(symtab, layout, object, | |
3640 | data_shndx, output_section, gsym, | |
3641 | reloc); | |
3642 | } | |
3643 | else | |
3644 | { | |
3645 | Reloc_section* rela_dyn = target->rela_dyn_section(layout); | |
3646 | check_non_pic(object, r_type); | |
3647 | rela_dyn->add_global(gsym, r_type, output_section, object, | |
3648 | data_shndx, reloc.get_r_offset(), | |
3649 | reloc.get_r_addend()); | |
3650 | } | |
3651 | } | |
3652 | break; | |
3653 | ||
6ce78956 AM |
3654 | case elfcpp::R_POWERPC_REL16: |
3655 | case elfcpp::R_POWERPC_REL16_LO: | |
3656 | case elfcpp::R_POWERPC_REL16_HI: | |
3657 | case elfcpp::R_POWERPC_REL16_HA: | |
dd93cd0a AM |
3658 | case elfcpp::R_POWERPC_REL14: |
3659 | case elfcpp::R_POWERPC_REL14_BRTAKEN: | |
3660 | case elfcpp::R_POWERPC_REL14_BRNTAKEN: | |
3661 | case elfcpp::R_POWERPC_SECTOFF: | |
3662 | case elfcpp::R_POWERPC_TPREL16: | |
3663 | case elfcpp::R_POWERPC_DTPREL16: | |
3664 | case elfcpp::R_POWERPC_SECTOFF_LO: | |
3665 | case elfcpp::R_POWERPC_TPREL16_LO: | |
3666 | case elfcpp::R_POWERPC_DTPREL16_LO: | |
3667 | case elfcpp::R_POWERPC_SECTOFF_HI: | |
3668 | case elfcpp::R_POWERPC_TPREL16_HI: | |
3669 | case elfcpp::R_POWERPC_DTPREL16_HI: | |
3670 | case elfcpp::R_POWERPC_SECTOFF_HA: | |
3671 | case elfcpp::R_POWERPC_TPREL16_HA: | |
3672 | case elfcpp::R_POWERPC_DTPREL16_HA: | |
3673 | case elfcpp::R_PPC64_DTPREL16_HIGHER: | |
3674 | case elfcpp::R_PPC64_TPREL16_HIGHER: | |
3675 | case elfcpp::R_PPC64_DTPREL16_HIGHERA: | |
3676 | case elfcpp::R_PPC64_TPREL16_HIGHERA: | |
3677 | case elfcpp::R_PPC64_DTPREL16_HIGHEST: | |
3678 | case elfcpp::R_PPC64_TPREL16_HIGHEST: | |
3679 | case elfcpp::R_PPC64_DTPREL16_HIGHESTA: | |
3680 | case elfcpp::R_PPC64_TPREL16_HIGHESTA: | |
3681 | case elfcpp::R_PPC64_TPREL16_DS: | |
3682 | case elfcpp::R_PPC64_TPREL16_LO_DS: | |
3683 | case elfcpp::R_PPC64_DTPREL16_DS: | |
3684 | case elfcpp::R_PPC64_DTPREL16_LO_DS: | |
3685 | case elfcpp::R_PPC64_SECTOFF_DS: | |
3686 | case elfcpp::R_PPC64_SECTOFF_LO_DS: | |
3687 | case elfcpp::R_PPC64_TLSGD: | |
3688 | case elfcpp::R_PPC64_TLSLD: | |
cf43a2fe AM |
3689 | break; |
3690 | ||
42cacb20 DE |
3691 | case elfcpp::R_POWERPC_GOT16: |
3692 | case elfcpp::R_POWERPC_GOT16_LO: | |
3693 | case elfcpp::R_POWERPC_GOT16_HI: | |
3694 | case elfcpp::R_POWERPC_GOT16_HA: | |
dd93cd0a AM |
3695 | case elfcpp::R_PPC64_GOT16_DS: |
3696 | case elfcpp::R_PPC64_GOT16_LO_DS: | |
42cacb20 | 3697 | { |
c9269dff AM |
3698 | // The symbol requires a GOT entry. |
3699 | Output_data_got_powerpc<size, big_endian>* got; | |
42cacb20 DE |
3700 | |
3701 | got = target->got_section(symtab, layout); | |
2e702c99 | 3702 | if (gsym->final_value_is_known()) |
2e702c99 | 3703 | { |
e5d5f5ed AM |
3704 | if (size == 32 && gsym->type() == elfcpp::STT_GNU_IFUNC) |
3705 | got->add_global_plt(gsym, GOT_TYPE_STANDARD); | |
3706 | else | |
3707 | got->add_global(gsym, GOT_TYPE_STANDARD); | |
3708 | } | |
3709 | else if (!gsym->has_got_offset(GOT_TYPE_STANDARD)) | |
3710 | { | |
3711 | // If we are generating a shared object or a pie, this | |
3712 | // symbol's GOT entry will be set by a dynamic relocation. | |
3713 | unsigned int off = got->add_constant(0); | |
3714 | gsym->set_got_offset(GOT_TYPE_STANDARD, off); | |
3715 | ||
2e702c99 | 3716 | Reloc_section* rela_dyn = target->rela_dyn_section(layout); |
e5d5f5ed AM |
3717 | if (gsym->can_use_relative_reloc(false) |
3718 | && !(size == 32 | |
3719 | && gsym->visibility() == elfcpp::STV_PROTECTED | |
3720 | && parameters->options().shared())) | |
2e702c99 | 3721 | { |
e5d5f5ed AM |
3722 | unsigned int dynrel = elfcpp::R_POWERPC_RELATIVE; |
3723 | if (gsym->type() == elfcpp::STT_GNU_IFUNC) | |
3724 | { | |
3725 | rela_dyn = target->iplt_section()->rel_plt(); | |
3726 | dynrel = elfcpp::R_POWERPC_IRELATIVE; | |
3727 | } | |
3728 | rela_dyn->add_global_relative(gsym, dynrel, got, off, 0, false); | |
3729 | } | |
3730 | else | |
3731 | { | |
3732 | unsigned int dynrel = elfcpp::R_POWERPC_GLOB_DAT; | |
3733 | rela_dyn->add_global(gsym, dynrel, got, off, 0); | |
42cacb20 | 3734 | } |
2e702c99 | 3735 | } |
42cacb20 DE |
3736 | } |
3737 | break; | |
3738 | ||
cf43a2fe AM |
3739 | case elfcpp::R_PPC64_TOC16: |
3740 | case elfcpp::R_PPC64_TOC16_LO: | |
3741 | case elfcpp::R_PPC64_TOC16_HI: | |
3742 | case elfcpp::R_PPC64_TOC16_HA: | |
3743 | case elfcpp::R_PPC64_TOC16_DS: | |
3744 | case elfcpp::R_PPC64_TOC16_LO_DS: | |
42cacb20 DE |
3745 | // We need a GOT section. |
3746 | target->got_section(symtab, layout); | |
3747 | break; | |
3748 | ||
dd93cd0a AM |
3749 | case elfcpp::R_POWERPC_GOT_TLSGD16: |
3750 | case elfcpp::R_POWERPC_GOT_TLSGD16_LO: | |
3751 | case elfcpp::R_POWERPC_GOT_TLSGD16_HI: | |
3752 | case elfcpp::R_POWERPC_GOT_TLSGD16_HA: | |
3753 | { | |
3754 | const bool final = gsym->final_value_is_known(); | |
3755 | const tls::Tls_optimization tls_type = target->optimize_tls_gd(final); | |
3756 | if (tls_type == tls::TLSOPT_NONE) | |
3757 | { | |
3758 | Output_data_got_powerpc<size, big_endian>* got | |
3759 | = target->got_section(symtab, layout); | |
3760 | got->add_global_pair_with_rel(gsym, GOT_TYPE_TLSGD, | |
3761 | target->rela_dyn_section(layout), | |
3762 | elfcpp::R_POWERPC_DTPMOD, | |
3763 | elfcpp::R_POWERPC_DTPREL); | |
3764 | } | |
3765 | else if (tls_type == tls::TLSOPT_TO_IE) | |
3766 | { | |
acc276d8 AM |
3767 | if (!gsym->has_got_offset(GOT_TYPE_TPREL)) |
3768 | { | |
3769 | Output_data_got_powerpc<size, big_endian>* got | |
3770 | = target->got_section(symtab, layout); | |
3771 | Reloc_section* rela_dyn = target->rela_dyn_section(layout); | |
3772 | if (gsym->is_undefined() | |
3773 | || gsym->is_from_dynobj()) | |
3774 | { | |
3775 | got->add_global_with_rel(gsym, GOT_TYPE_TPREL, rela_dyn, | |
3776 | elfcpp::R_POWERPC_TPREL); | |
3777 | } | |
3778 | else | |
3779 | { | |
3780 | unsigned int off = got->add_constant(0); | |
3781 | gsym->set_got_offset(GOT_TYPE_TPREL, off); | |
3782 | unsigned int dynrel = elfcpp::R_POWERPC_TPREL; | |
3783 | rela_dyn->add_symbolless_global_addend(gsym, dynrel, | |
3784 | got, off, 0); | |
3785 | } | |
3786 | } | |
dd93cd0a AM |
3787 | } |
3788 | else if (tls_type == tls::TLSOPT_TO_LE) | |
3789 | { | |
3790 | // no GOT relocs needed for Local Exec. | |
3791 | } | |
3792 | else | |
3793 | gold_unreachable(); | |
3794 | } | |
42cacb20 DE |
3795 | break; |
3796 | ||
dd93cd0a AM |
3797 | case elfcpp::R_POWERPC_GOT_TLSLD16: |
3798 | case elfcpp::R_POWERPC_GOT_TLSLD16_LO: | |
3799 | case elfcpp::R_POWERPC_GOT_TLSLD16_HI: | |
3800 | case elfcpp::R_POWERPC_GOT_TLSLD16_HA: | |
3801 | { | |
3802 | const tls::Tls_optimization tls_type = target->optimize_tls_ld(); | |
3803 | if (tls_type == tls::TLSOPT_NONE) | |
3804 | target->tlsld_got_offset(symtab, layout, object); | |
3805 | else if (tls_type == tls::TLSOPT_TO_LE) | |
3806 | { | |
3807 | // no GOT relocs needed for Local Exec. | |
7404fe1b AM |
3808 | if (parameters->options().emit_relocs()) |
3809 | { | |
3810 | Output_section* os = layout->tls_segment()->first_section(); | |
3811 | gold_assert(os != NULL); | |
3812 | os->set_needs_symtab_index(); | |
3813 | } | |
dd93cd0a AM |
3814 | } |
3815 | else | |
3816 | gold_unreachable(); | |
3817 | } | |
3818 | break; | |
3819 | ||
3820 | case elfcpp::R_POWERPC_GOT_DTPREL16: | |
3821 | case elfcpp::R_POWERPC_GOT_DTPREL16_LO: | |
3822 | case elfcpp::R_POWERPC_GOT_DTPREL16_HI: | |
3823 | case elfcpp::R_POWERPC_GOT_DTPREL16_HA: | |
3824 | { | |
3825 | Output_data_got_powerpc<size, big_endian>* got | |
3826 | = target->got_section(symtab, layout); | |
bd73a62d AM |
3827 | if (!gsym->final_value_is_known() |
3828 | && (gsym->is_from_dynobj() | |
3829 | || gsym->is_undefined() | |
3830 | || gsym->is_preemptible())) | |
3831 | got->add_global_with_rel(gsym, GOT_TYPE_DTPREL, | |
3832 | target->rela_dyn_section(layout), | |
3833 | elfcpp::R_POWERPC_DTPREL); | |
3834 | else | |
3835 | got->add_global_tls(gsym, GOT_TYPE_DTPREL); | |
dd93cd0a AM |
3836 | } |
3837 | break; | |
3838 | ||
3839 | case elfcpp::R_POWERPC_GOT_TPREL16: | |
3840 | case elfcpp::R_POWERPC_GOT_TPREL16_LO: | |
3841 | case elfcpp::R_POWERPC_GOT_TPREL16_HI: | |
3842 | case elfcpp::R_POWERPC_GOT_TPREL16_HA: | |
3843 | { | |
3844 | const bool final = gsym->final_value_is_known(); | |
3845 | const tls::Tls_optimization tls_type = target->optimize_tls_ie(final); | |
3846 | if (tls_type == tls::TLSOPT_NONE) | |
3847 | { | |
acc276d8 AM |
3848 | if (!gsym->has_got_offset(GOT_TYPE_TPREL)) |
3849 | { | |
3850 | Output_data_got_powerpc<size, big_endian>* got | |
3851 | = target->got_section(symtab, layout); | |
3852 | Reloc_section* rela_dyn = target->rela_dyn_section(layout); | |
3853 | if (gsym->is_undefined() | |
3854 | || gsym->is_from_dynobj()) | |
3855 | { | |
3856 | got->add_global_with_rel(gsym, GOT_TYPE_TPREL, rela_dyn, | |
3857 | elfcpp::R_POWERPC_TPREL); | |
3858 | } | |
3859 | else | |
3860 | { | |
3861 | unsigned int off = got->add_constant(0); | |
3862 | gsym->set_got_offset(GOT_TYPE_TPREL, off); | |
3863 | unsigned int dynrel = elfcpp::R_POWERPC_TPREL; | |
3864 | rela_dyn->add_symbolless_global_addend(gsym, dynrel, | |
3865 | got, off, 0); | |
3866 | } | |
3867 | } | |
dd93cd0a AM |
3868 | } |
3869 | else if (tls_type == tls::TLSOPT_TO_LE) | |
3870 | { | |
3871 | // no GOT relocs needed for Local Exec. | |
3872 | } | |
3873 | else | |
3874 | gold_unreachable(); | |
3875 | } | |
42cacb20 DE |
3876 | break; |
3877 | ||
3878 | default: | |
3879 | unsupported_reloc_global(object, r_type, gsym); | |
3880 | break; | |
3881 | } | |
3882 | } | |
3883 | ||
6d03d481 ST |
3884 | // Process relocations for gc. |
3885 | ||
3886 | template<int size, bool big_endian> | |
3887 | void | |
3888 | Target_powerpc<size, big_endian>::gc_process_relocs( | |
d83ce4e3 AM |
3889 | Symbol_table* symtab, |
3890 | Layout* layout, | |
3891 | Sized_relobj_file<size, big_endian>* object, | |
3892 | unsigned int data_shndx, | |
3893 | unsigned int, | |
3894 | const unsigned char* prelocs, | |
3895 | size_t reloc_count, | |
3896 | Output_section* output_section, | |
3897 | bool needs_special_offset_handling, | |
3898 | size_t local_symbol_count, | |
3899 | const unsigned char* plocal_symbols) | |
6d03d481 ST |
3900 | { |
3901 | typedef Target_powerpc<size, big_endian> Powerpc; | |
2ea97941 | 3902 | typedef typename Target_powerpc<size, big_endian>::Scan Scan; |
e81fea4d AM |
3903 | Powerpc_relobj<size, big_endian>* ppc_object |
3904 | = static_cast<Powerpc_relobj<size, big_endian>*>(object); | |
3905 | if (size == 64) | |
3906 | ppc_object->set_opd_valid(); | |
3907 | if (size == 64 && data_shndx == ppc_object->opd_shndx()) | |
3908 | { | |
3909 | typename Powerpc_relobj<size, big_endian>::Access_from::iterator p; | |
3910 | for (p = ppc_object->access_from_map()->begin(); | |
3911 | p != ppc_object->access_from_map()->end(); | |
3912 | ++p) | |
3913 | { | |
3914 | Address dst_off = p->first; | |
3915 | unsigned int dst_indx = ppc_object->get_opd_ent(dst_off); | |
3916 | typename Powerpc_relobj<size, big_endian>::Section_refs::iterator s; | |
3917 | for (s = p->second.begin(); s != p->second.end(); ++s) | |
3918 | { | |
3919 | Object* src_obj = s->first; | |
3920 | unsigned int src_indx = s->second; | |
3921 | symtab->gc()->add_reference(src_obj, src_indx, | |
3922 | ppc_object, dst_indx); | |
3923 | } | |
3924 | p->second.clear(); | |
3925 | } | |
3926 | ppc_object->access_from_map()->clear(); | |
c6de8ed4 | 3927 | ppc_object->process_gc_mark(symtab); |
e81fea4d AM |
3928 | // Don't look at .opd relocs as .opd will reference everything. |
3929 | return; | |
3930 | } | |
6d03d481 | 3931 | |
41cbeecc | 3932 | gold::gc_process_relocs<size, big_endian, Powerpc, elfcpp::SHT_RELA, Scan, |
3ff2ccb0 | 3933 | typename Target_powerpc::Relocatable_size_for_reloc>( |
6d03d481 ST |
3934 | symtab, |
3935 | layout, | |
3936 | this, | |
3937 | object, | |
3938 | data_shndx, | |
3939 | prelocs, | |
3940 | reloc_count, | |
3941 | output_section, | |
3942 | needs_special_offset_handling, | |
3943 | local_symbol_count, | |
3944 | plocal_symbols); | |
3945 | } | |
3946 | ||
e81fea4d AM |
3947 | // Handle target specific gc actions when adding a gc reference from |
3948 | // SRC_OBJ, SRC_SHNDX to a location specified by DST_OBJ, DST_SHNDX | |
3949 | // and DST_OFF. For powerpc64, this adds a referenc to the code | |
3950 | // section of a function descriptor. | |
3951 | ||
3952 | template<int size, bool big_endian> | |
3953 | void | |
3954 | Target_powerpc<size, big_endian>::do_gc_add_reference( | |
3955 | Symbol_table* symtab, | |
3956 | Object* src_obj, | |
3957 | unsigned int src_shndx, | |
3958 | Object* dst_obj, | |
3959 | unsigned int dst_shndx, | |
3960 | Address dst_off) const | |
3961 | { | |
3962 | Powerpc_relobj<size, big_endian>* ppc_object | |
3963 | = static_cast<Powerpc_relobj<size, big_endian>*>(dst_obj); | |
acc276d8 AM |
3964 | if (size == 64 |
3965 | && !ppc_object->is_dynamic() | |
3966 | && dst_shndx == ppc_object->opd_shndx()) | |
e81fea4d AM |
3967 | { |
3968 | if (ppc_object->opd_valid()) | |
3969 | { | |
3970 | dst_shndx = ppc_object->get_opd_ent(dst_off); | |
3971 | symtab->gc()->add_reference(src_obj, src_shndx, dst_obj, dst_shndx); | |
3972 | } | |
3973 | else | |
3974 | { | |
3975 | // If we haven't run scan_opd_relocs, we must delay | |
3976 | // processing this function descriptor reference. | |
3977 | ppc_object->add_reference(src_obj, src_shndx, dst_off); | |
3978 | } | |
3979 | } | |
3980 | } | |
3981 | ||
3982 | // Add any special sections for this symbol to the gc work list. | |
3983 | // For powerpc64, this adds the code section of a function | |
3984 | // descriptor. | |
3985 | ||
3986 | template<int size, bool big_endian> | |
3987 | void | |
3988 | Target_powerpc<size, big_endian>::do_gc_mark_symbol( | |
3989 | Symbol_table* symtab, | |
3990 | Symbol* sym) const | |
3991 | { | |
3992 | if (size == 64) | |
3993 | { | |
3994 | Powerpc_relobj<size, big_endian>* ppc_object | |
3995 | = static_cast<Powerpc_relobj<size, big_endian>*>(sym->object()); | |
3996 | bool is_ordinary; | |
3997 | unsigned int shndx = sym->shndx(&is_ordinary); | |
3998 | if (is_ordinary && shndx == ppc_object->opd_shndx()) | |
3999 | { | |
4000 | Sized_symbol<size>* gsym = symtab->get_sized_symbol<size>(sym); | |
4001 | Address dst_off = gsym->value(); | |
c6de8ed4 AM |
4002 | if (ppc_object->opd_valid()) |
4003 | { | |
4004 | unsigned int dst_indx = ppc_object->get_opd_ent(dst_off); | |
4005 | symtab->gc()->worklist().push(Section_id(ppc_object, dst_indx)); | |
4006 | } | |
4007 | else | |
4008 | ppc_object->add_gc_mark(dst_off); | |
e81fea4d AM |
4009 | } |
4010 | } | |
4011 | } | |
4012 | ||
42cacb20 DE |
4013 | // Scan relocations for a section. |
4014 | ||
4015 | template<int size, bool big_endian> | |
4016 | void | |
4017 | Target_powerpc<size, big_endian>::scan_relocs( | |
d83ce4e3 AM |
4018 | Symbol_table* symtab, |
4019 | Layout* layout, | |
4020 | Sized_relobj_file<size, big_endian>* object, | |
4021 | unsigned int data_shndx, | |
4022 | unsigned int sh_type, | |
4023 | const unsigned char* prelocs, | |
4024 | size_t reloc_count, | |
4025 | Output_section* output_section, | |
4026 | bool needs_special_offset_handling, | |
4027 | size_t local_symbol_count, | |
4028 | const unsigned char* plocal_symbols) | |
42cacb20 DE |
4029 | { |
4030 | typedef Target_powerpc<size, big_endian> Powerpc; | |
2ea97941 | 4031 | typedef typename Target_powerpc<size, big_endian>::Scan Scan; |
42cacb20 DE |
4032 | |
4033 | if (sh_type == elfcpp::SHT_REL) | |
4034 | { | |
4035 | gold_error(_("%s: unsupported REL reloc section"), | |
4036 | object->name().c_str()); | |
4037 | return; | |
4038 | } | |
4039 | ||
cf43a2fe AM |
4040 | if (size == 32) |
4041 | { | |
acc276d8 AM |
4042 | // Define a weak hidden _GLOBAL_OFFSET_TABLE_ to ensure it isn't |
4043 | // seen as undefined when scanning relocs (and thus requires | |
4044 | // non-relative dynamic relocs). The proper value will be | |
4045 | // updated later. | |
4046 | Symbol *gotsym = symtab->lookup("_GLOBAL_OFFSET_TABLE_", NULL); | |
4047 | if (gotsym != NULL && gotsym->is_undefined()) | |
4048 | symtab->define_in_output_data("_GLOBAL_OFFSET_TABLE_", NULL, | |
4049 | Symbol_table::PREDEFINED, | |
4050 | this->got_section(symtab, layout), 0, 0, | |
4051 | elfcpp::STT_OBJECT, | |
4052 | elfcpp::STB_WEAK, | |
4053 | elfcpp::STV_HIDDEN, 0, | |
4054 | false, false); | |
4055 | ||
cf43a2fe AM |
4056 | static Output_data_space* sdata; |
4057 | ||
4058 | // Define _SDA_BASE_ at the start of the .sdata section. | |
4059 | if (sdata == NULL) | |
4060 | { | |
4061 | // layout->find_output_section(".sdata") == NULL | |
4062 | sdata = new Output_data_space(4, "** sdata"); | |
4063 | Output_section* os | |
4064 | = layout->add_output_section_data(".sdata", 0, | |
4065 | elfcpp::SHF_ALLOC | |
4066 | | elfcpp::SHF_WRITE, | |
4067 | sdata, ORDER_SMALL_DATA, false); | |
4068 | symtab->define_in_output_data("_SDA_BASE_", NULL, | |
4069 | Symbol_table::PREDEFINED, | |
4070 | os, 32768, 0, elfcpp::STT_OBJECT, | |
4071 | elfcpp::STB_LOCAL, elfcpp::STV_HIDDEN, | |
4072 | 0, false, false); | |
4073 | } | |
4074 | } | |
42cacb20 | 4075 | |
2ea97941 | 4076 | gold::scan_relocs<size, big_endian, Powerpc, elfcpp::SHT_RELA, Scan>( |
42cacb20 DE |
4077 | symtab, |
4078 | layout, | |
4079 | this, | |
4080 | object, | |
4081 | data_shndx, | |
4082 | prelocs, | |
4083 | reloc_count, | |
4084 | output_section, | |
4085 | needs_special_offset_handling, | |
4086 | local_symbol_count, | |
4087 | plocal_symbols); | |
4088 | } | |
4089 | ||
ec4dbad3 AM |
4090 | // Functor class for processing the global symbol table. |
4091 | // Removes symbols defined on discarded opd entries. | |
4092 | ||
4093 | template<bool big_endian> | |
4094 | class Global_symbol_visitor_opd | |
4095 | { | |
4096 | public: | |
4097 | Global_symbol_visitor_opd() | |
4098 | { } | |
4099 | ||
4100 | void | |
4101 | operator()(Sized_symbol<64>* sym) | |
4102 | { | |
4103 | if (sym->has_symtab_index() | |
4104 | || sym->source() != Symbol::FROM_OBJECT | |
4105 | || !sym->in_real_elf()) | |
4106 | return; | |
4107 | ||
4108 | Powerpc_relobj<64, big_endian>* symobj | |
4109 | = static_cast<Powerpc_relobj<64, big_endian>*>(sym->object()); | |
4110 | if (symobj->is_dynamic() | |
4111 | || symobj->opd_shndx() == 0) | |
4112 | return; | |
4113 | ||
4114 | bool is_ordinary; | |
4115 | unsigned int shndx = sym->shndx(&is_ordinary); | |
4116 | if (shndx == symobj->opd_shndx() | |
4117 | && symobj->get_opd_discard(sym->value())) | |
4118 | sym->set_symtab_index(-1U); | |
4119 | } | |
4120 | }; | |
4121 | ||
f3a0ed29 AM |
4122 | template<int size, bool big_endian> |
4123 | void | |
4124 | Target_powerpc<size, big_endian>::define_save_restore_funcs( | |
4125 | Layout* layout, | |
4126 | Symbol_table* symtab) | |
4127 | { | |
4128 | if (size == 64) | |
4129 | { | |
4130 | Output_data_save_res<64, big_endian>* savres | |
4131 | = new Output_data_save_res<64, big_endian>(symtab); | |
4132 | layout->add_output_section_data(".text", elfcpp::SHT_PROGBITS, | |
4133 | elfcpp::SHF_ALLOC | elfcpp::SHF_EXECINSTR, | |
4134 | savres, ORDER_TEXT, false); | |
4135 | } | |
4136 | } | |
4137 | ||
42cacb20 DE |
4138 | // Finalize the sections. |
4139 | ||
4140 | template<int size, bool big_endian> | |
4141 | void | |
d5b40221 DK |
4142 | Target_powerpc<size, big_endian>::do_finalize_sections( |
4143 | Layout* layout, | |
f59f41f3 | 4144 | const Input_objects*, |
ec4dbad3 | 4145 | Symbol_table* symtab) |
42cacb20 | 4146 | { |
c9824451 AM |
4147 | if (parameters->doing_static_link()) |
4148 | { | |
4149 | // At least some versions of glibc elf-init.o have a strong | |
4150 | // reference to __rela_iplt marker syms. A weak ref would be | |
4151 | // better.. | |
4152 | if (this->iplt_ != NULL) | |
4153 | { | |
4154 | Reloc_section* rel = this->iplt_->rel_plt(); | |
4155 | symtab->define_in_output_data("__rela_iplt_start", NULL, | |
4156 | Symbol_table::PREDEFINED, rel, 0, 0, | |
4157 | elfcpp::STT_NOTYPE, elfcpp::STB_GLOBAL, | |
4158 | elfcpp::STV_HIDDEN, 0, false, true); | |
4159 | symtab->define_in_output_data("__rela_iplt_end", NULL, | |
4160 | Symbol_table::PREDEFINED, rel, 0, 0, | |
4161 | elfcpp::STT_NOTYPE, elfcpp::STB_GLOBAL, | |
4162 | elfcpp::STV_HIDDEN, 0, true, true); | |
4163 | } | |
4164 | else | |
4165 | { | |
4166 | symtab->define_as_constant("__rela_iplt_start", NULL, | |
4167 | Symbol_table::PREDEFINED, 0, 0, | |
4168 | elfcpp::STT_NOTYPE, elfcpp::STB_GLOBAL, | |
4169 | elfcpp::STV_HIDDEN, 0, true, false); | |
4170 | symtab->define_as_constant("__rela_iplt_end", NULL, | |
4171 | Symbol_table::PREDEFINED, 0, 0, | |
4172 | elfcpp::STT_NOTYPE, elfcpp::STB_GLOBAL, | |
4173 | elfcpp::STV_HIDDEN, 0, true, false); | |
4174 | } | |
4175 | } | |
4176 | ||
ec4dbad3 AM |
4177 | if (size == 64) |
4178 | { | |
4179 | typedef Global_symbol_visitor_opd<big_endian> Symbol_visitor; | |
4180 | symtab->for_all_symbols<64, Symbol_visitor>(Symbol_visitor()); | |
f3a0ed29 | 4181 | this->define_save_restore_funcs(layout, symtab); |
ec4dbad3 AM |
4182 | } |
4183 | ||
42cacb20 | 4184 | // Fill in some more dynamic tags. |
c9269dff | 4185 | Output_data_dynamic* odyn = layout->dynamic_data(); |
c9824451 | 4186 | if (odyn != NULL) |
cf43a2fe | 4187 | { |
c9824451 AM |
4188 | const Reloc_section* rel_plt = (this->plt_ == NULL |
4189 | ? NULL | |
4190 | : this->plt_->rel_plt()); | |
4191 | layout->add_target_dynamic_tags(false, this->plt_, rel_plt, | |
4192 | this->rela_dyn_, true, size == 32); | |
4193 | ||
4194 | if (size == 32) | |
dd93cd0a | 4195 | { |
c9824451 AM |
4196 | if (this->got_ != NULL) |
4197 | { | |
4198 | this->got_->finalize_data_size(); | |
4199 | odyn->add_section_plus_offset(elfcpp::DT_PPC_GOT, | |
4200 | this->got_, this->got_->g_o_t()); | |
4201 | } | |
dd93cd0a | 4202 | } |
c9824451 | 4203 | else |
dd93cd0a | 4204 | { |
c9824451 AM |
4205 | if (this->glink_ != NULL) |
4206 | { | |
4207 | this->glink_->finalize_data_size(); | |
4208 | odyn->add_section_plus_offset(elfcpp::DT_PPC64_GLINK, | |
4209 | this->glink_, | |
4210 | (this->glink_->pltresolve() | |
4211 | + this->glink_->pltresolve_size | |
4212 | - 32)); | |
4213 | } | |
dd93cd0a | 4214 | } |
c9269dff | 4215 | } |
cf43a2fe | 4216 | |
42cacb20 DE |
4217 | // Emit any relocs we saved in an attempt to avoid generating COPY |
4218 | // relocs. | |
4219 | if (this->copy_relocs_.any_saved_relocs()) | |
4220 | this->copy_relocs_.emit(this->rela_dyn_section(layout)); | |
4221 | } | |
4222 | ||
3ea0a085 AM |
4223 | // Return the value to use for a branch relocation. |
4224 | ||
4225 | template<int size, bool big_endian> | |
4226 | typename elfcpp::Elf_types<size>::Elf_Addr | |
4227 | Target_powerpc<size, big_endian>::symval_for_branch( | |
4228 | Address value, | |
4229 | const Sized_symbol<size>* gsym, | |
4230 | Powerpc_relobj<size, big_endian>* object, | |
4231 | unsigned int *dest_shndx) | |
4232 | { | |
4233 | *dest_shndx = 0; | |
4234 | if (size == 32) | |
4235 | return value; | |
4236 | ||
4237 | // If the symbol is defined in an opd section, ie. is a function | |
4238 | // descriptor, use the function descriptor code entry address | |
4239 | Powerpc_relobj<size, big_endian>* symobj = object; | |
f3a0ed29 AM |
4240 | if (gsym != NULL |
4241 | && gsym->source() != Symbol::FROM_OBJECT) | |
4242 | return value; | |
3ea0a085 AM |
4243 | if (gsym != NULL) |
4244 | symobj = static_cast<Powerpc_relobj<size, big_endian>*>(gsym->object()); | |
4245 | unsigned int shndx = symobj->opd_shndx(); | |
4246 | if (shndx == 0) | |
4247 | return value; | |
4248 | Address opd_addr = symobj->get_output_section_offset(shndx); | |
4249 | gold_assert(opd_addr != invalid_address); | |
4250 | opd_addr += symobj->output_section(shndx)->address(); | |
4251 | if (value >= opd_addr && value < opd_addr + symobj->section_size(shndx)) | |
4252 | { | |
4253 | Address sec_off; | |
e81fea4d | 4254 | *dest_shndx = symobj->get_opd_ent(value - opd_addr, &sec_off); |
3ea0a085 AM |
4255 | Address sec_addr = symobj->get_output_section_offset(*dest_shndx); |
4256 | gold_assert(sec_addr != invalid_address); | |
4257 | sec_addr += symobj->output_section(*dest_shndx)->address(); | |
4258 | value = sec_addr + sec_off; | |
4259 | } | |
4260 | return value; | |
4261 | } | |
4262 | ||
42cacb20 DE |
4263 | // Perform a relocation. |
4264 | ||
4265 | template<int size, bool big_endian> | |
4266 | inline bool | |
4267 | Target_powerpc<size, big_endian>::Relocate::relocate( | |
d83ce4e3 AM |
4268 | const Relocate_info<size, big_endian>* relinfo, |
4269 | Target_powerpc* target, | |
4270 | Output_section* os, | |
4271 | size_t relnum, | |
4272 | const elfcpp::Rela<size, big_endian>& rela, | |
4273 | unsigned int r_type, | |
4274 | const Sized_symbol<size>* gsym, | |
4275 | const Symbol_value<size>* psymval, | |
4276 | unsigned char* view, | |
c9269dff AM |
4277 | Address address, |
4278 | section_size_type view_size) | |
42cacb20 | 4279 | { |
dd93cd0a AM |
4280 | |
4281 | bool is_tls_call = ((r_type == elfcpp::R_POWERPC_REL24 | |
4282 | || r_type == elfcpp::R_PPC_PLTREL24) | |
4283 | && gsym != NULL | |
4284 | && strcmp(gsym->name(), "__tls_get_addr") == 0); | |
4285 | enum skip_tls last_tls = this->call_tls_get_addr_; | |
4286 | this->call_tls_get_addr_ = CALL_NOT_EXPECTED; | |
4287 | if (is_tls_call) | |
4288 | { | |
4289 | if (last_tls == CALL_NOT_EXPECTED) | |
4290 | gold_error_at_location(relinfo, relnum, rela.get_r_offset(), | |
4291 | _("__tls_get_addr call lacks marker reloc")); | |
4292 | else if (last_tls == CALL_SKIP) | |
4293 | return false; | |
4294 | } | |
4295 | else if (last_tls != CALL_NOT_EXPECTED) | |
4296 | gold_error_at_location(relinfo, relnum, rela.get_r_offset(), | |
4297 | _("missing expected __tls_get_addr call")); | |
4298 | ||
42cacb20 | 4299 | typedef Powerpc_relocate_functions<size, big_endian> Reloc; |
dd93cd0a | 4300 | typedef typename elfcpp::Swap<32, big_endian>::Valtype Insn; |
3ea0a085 AM |
4301 | Powerpc_relobj<size, big_endian>* const object |
4302 | = static_cast<Powerpc_relobj<size, big_endian>*>(relinfo->object); | |
dd93cd0a AM |
4303 | Address value = 0; |
4304 | bool has_plt_value = false; | |
e5d5f5ed | 4305 | unsigned int r_sym = elfcpp::elf_r_sym<size>(rela.get_r_info()); |
dd93cd0a | 4306 | if (gsym != NULL |
e5d5f5ed AM |
4307 | ? use_plt_offset<size>(gsym, Scan::get_reference_flags(r_type)) |
4308 | : object->local_has_plt_offset(r_sym)) | |
dd93cd0a AM |
4309 | { |
4310 | const Output_data_glink<size, big_endian>* glink | |
4311 | = target->glink_section(); | |
c9824451 AM |
4312 | unsigned int glink_index; |
4313 | if (gsym != NULL) | |
4314 | glink_index = glink->find_entry(object, gsym, rela); | |
4315 | else | |
4316 | glink_index = glink->find_entry(object, r_sym, rela); | |
dd93cd0a AM |
4317 | value = glink->address() + glink_index * glink->glink_entry_size(); |
4318 | has_plt_value = true; | |
4319 | } | |
cf43a2fe AM |
4320 | |
4321 | if (r_type == elfcpp::R_POWERPC_GOT16 | |
4322 | || r_type == elfcpp::R_POWERPC_GOT16_LO | |
4323 | || r_type == elfcpp::R_POWERPC_GOT16_HI | |
4324 | || r_type == elfcpp::R_POWERPC_GOT16_HA | |
4325 | || r_type == elfcpp::R_PPC64_GOT16_DS | |
4326 | || r_type == elfcpp::R_PPC64_GOT16_LO_DS) | |
42cacb20 | 4327 | { |
cf43a2fe AM |
4328 | if (gsym != NULL) |
4329 | { | |
4330 | gold_assert(gsym->has_got_offset(GOT_TYPE_STANDARD)); | |
4331 | value = gsym->got_offset(GOT_TYPE_STANDARD); | |
4332 | } | |
4333 | else | |
4334 | { | |
4335 | unsigned int r_sym = elfcpp::elf_r_sym<size>(rela.get_r_info()); | |
4336 | gold_assert(object->local_has_got_offset(r_sym, GOT_TYPE_STANDARD)); | |
4337 | value = object->local_got_offset(r_sym, GOT_TYPE_STANDARD); | |
4338 | } | |
dd93cd0a | 4339 | value -= target->got_section()->got_base_offset(object); |
cf43a2fe AM |
4340 | } |
4341 | else if (r_type == elfcpp::R_PPC64_TOC) | |
4342 | { | |
c9269dff | 4343 | value = (target->got_section()->output_section()->address() |
dd93cd0a | 4344 | + object->toc_base_offset()); |
cf43a2fe AM |
4345 | } |
4346 | else if (gsym != NULL | |
4347 | && (r_type == elfcpp::R_POWERPC_REL24 | |
4348 | || r_type == elfcpp::R_PPC_PLTREL24) | |
dd93cd0a | 4349 | && has_plt_value) |
cf43a2fe | 4350 | { |
c9269dff AM |
4351 | if (size == 64) |
4352 | { | |
4353 | typedef typename elfcpp::Swap<32, big_endian>::Valtype Valtype; | |
4354 | Valtype* wv = reinterpret_cast<Valtype*>(view); | |
4355 | bool can_plt_call = false; | |
4356 | if (rela.get_r_offset() + 8 <= view_size) | |
4357 | { | |
3ea0a085 | 4358 | Valtype insn = elfcpp::Swap<32, big_endian>::readval(wv); |
c9269dff | 4359 | Valtype insn2 = elfcpp::Swap<32, big_endian>::readval(wv + 1); |
3ea0a085 AM |
4360 | if ((insn & 1) != 0 |
4361 | && (insn2 == nop | |
4362 | || insn2 == cror_15_15_15 || insn2 == cror_31_31_31)) | |
c9269dff AM |
4363 | { |
4364 | elfcpp::Swap<32, big_endian>::writeval(wv + 1, ld_2_1 + 40); | |
4365 | can_plt_call = true; | |
4366 | } | |
4367 | } | |
4368 | if (!can_plt_call) | |
3ea0a085 AM |
4369 | { |
4370 | // If we don't have a branch and link followed by a nop, | |
4371 | // we can't go via the plt because there is no place to | |
4372 | // put a toc restoring instruction. | |
4373 | // Unless we know we won't be returning. | |
4374 | if (strcmp(gsym->name(), "__libc_start_main") == 0) | |
4375 | can_plt_call = true; | |
4376 | } | |
4377 | if (!can_plt_call) | |
4378 | { | |
4379 | // This is not an error in one special case: A self | |
4380 | // call. It isn't possible to cheaply verify we have | |
4381 | // such a call so just check for a call to the same | |
4382 | // section. | |
4383 | bool ok = false; | |
c9824451 | 4384 | Address code = value; |
3ea0a085 AM |
4385 | if (gsym->source() == Symbol::FROM_OBJECT |
4386 | && gsym->object() == object) | |
4387 | { | |
4388 | Address addend = rela.get_r_addend(); | |
4389 | unsigned int dest_shndx; | |
c9824451 AM |
4390 | Address opdent = psymval->value(object, addend); |
4391 | code = target->symval_for_branch(opdent, gsym, object, | |
4392 | &dest_shndx); | |
3ea0a085 AM |
4393 | bool is_ordinary; |
4394 | if (dest_shndx == 0) | |
4395 | dest_shndx = gsym->shndx(&is_ordinary); | |
4396 | ok = dest_shndx == relinfo->data_shndx; | |
4397 | } | |
4398 | if (!ok) | |
c9824451 AM |
4399 | { |
4400 | gold_error_at_location(relinfo, relnum, rela.get_r_offset(), | |
4401 | _("call lacks nop, can't restore toc; " | |
4402 | "recompile with -fPIC")); | |
4403 | value = code; | |
4404 | } | |
3ea0a085 | 4405 | } |
c9269dff | 4406 | } |
cf43a2fe | 4407 | } |
dd93cd0a AM |
4408 | else if (r_type == elfcpp::R_POWERPC_GOT_TLSGD16 |
4409 | || r_type == elfcpp::R_POWERPC_GOT_TLSGD16_LO | |
4410 | || r_type == elfcpp::R_POWERPC_GOT_TLSGD16_HI | |
4411 | || r_type == elfcpp::R_POWERPC_GOT_TLSGD16_HA) | |
4412 | { | |
4413 | // First instruction of a global dynamic sequence, arg setup insn. | |
4414 | const bool final = gsym == NULL || gsym->final_value_is_known(); | |
4415 | const tls::Tls_optimization tls_type = target->optimize_tls_gd(final); | |
4416 | enum Got_type got_type = GOT_TYPE_STANDARD; | |
4417 | if (tls_type == tls::TLSOPT_NONE) | |
4418 | got_type = GOT_TYPE_TLSGD; | |
4419 | else if (tls_type == tls::TLSOPT_TO_IE) | |
4420 | got_type = GOT_TYPE_TPREL; | |
4421 | if (got_type != GOT_TYPE_STANDARD) | |
4422 | { | |
4423 | if (gsym != NULL) | |
4424 | { | |
4425 | gold_assert(gsym->has_got_offset(got_type)); | |
4426 | value = gsym->got_offset(got_type); | |
4427 | } | |
4428 | else | |
4429 | { | |
4430 | unsigned int r_sym = elfcpp::elf_r_sym<size>(rela.get_r_info()); | |
4431 | gold_assert(object->local_has_got_offset(r_sym, got_type)); | |
4432 | value = object->local_got_offset(r_sym, got_type); | |
4433 | } | |
4434 | value -= target->got_section()->got_base_offset(object); | |
4435 | } | |
4436 | if (tls_type == tls::TLSOPT_TO_IE) | |
4437 | { | |
4438 | if (r_type == elfcpp::R_POWERPC_GOT_TLSGD16 | |
4439 | || r_type == elfcpp::R_POWERPC_GOT_TLSGD16_LO) | |
4440 | { | |
4441 | Insn* iview = reinterpret_cast<Insn*>(view - 2 * big_endian); | |
4442 | Insn insn = elfcpp::Swap<32, big_endian>::readval(iview); | |
4443 | insn &= (1 << 26) - (1 << 16); // extract rt,ra from addi | |
4444 | if (size == 32) | |
4445 | insn |= 32 << 26; // lwz | |
4446 | else | |
4447 | insn |= 58 << 26; // ld | |
4448 | elfcpp::Swap<32, big_endian>::writeval(iview, insn); | |
4449 | } | |
4450 | r_type += (elfcpp::R_POWERPC_GOT_TPREL16 | |
4451 | - elfcpp::R_POWERPC_GOT_TLSGD16); | |
4452 | } | |
4453 | else if (tls_type == tls::TLSOPT_TO_LE) | |
4454 | { | |
4455 | if (r_type == elfcpp::R_POWERPC_GOT_TLSGD16 | |
4456 | || r_type == elfcpp::R_POWERPC_GOT_TLSGD16_LO) | |
4457 | { | |
4458 | Insn* iview = reinterpret_cast<Insn*>(view - 2 * big_endian); | |
4459 | Insn insn = addis_3_13; | |
4460 | if (size == 32) | |
4461 | insn = addis_3_2; | |
4462 | elfcpp::Swap<32, big_endian>::writeval(iview, insn); | |
4463 | r_type = elfcpp::R_POWERPC_TPREL16_HA; | |
4464 | value = psymval->value(object, rela.get_r_addend()); | |
4465 | } | |
4466 | else | |
4467 | { | |
4468 | Insn* iview = reinterpret_cast<Insn*>(view - 2 * big_endian); | |
4469 | Insn insn = nop; | |
4470 | elfcpp::Swap<32, big_endian>::writeval(iview, insn); | |
4471 | r_type = elfcpp::R_POWERPC_NONE; | |
4472 | } | |
4473 | } | |
4474 | } | |
4475 | else if (r_type == elfcpp::R_POWERPC_GOT_TLSLD16 | |
4476 | || r_type == elfcpp::R_POWERPC_GOT_TLSLD16_LO | |
4477 | || r_type == elfcpp::R_POWERPC_GOT_TLSLD16_HI | |
4478 | || r_type == elfcpp::R_POWERPC_GOT_TLSLD16_HA) | |
4479 | { | |
4480 | // First instruction of a local dynamic sequence, arg setup insn. | |
4481 | const tls::Tls_optimization tls_type = target->optimize_tls_ld(); | |
4482 | if (tls_type == tls::TLSOPT_NONE) | |
4483 | { | |
4484 | value = target->tlsld_got_offset(); | |
4485 | value -= target->got_section()->got_base_offset(object); | |
4486 | } | |
4487 | else | |
4488 | { | |
4489 | gold_assert(tls_type == tls::TLSOPT_TO_LE); | |
4490 | if (r_type == elfcpp::R_POWERPC_GOT_TLSLD16 | |
4491 | || r_type == elfcpp::R_POWERPC_GOT_TLSLD16_LO) | |
4492 | { | |
4493 | Insn* iview = reinterpret_cast<Insn*>(view - 2 * big_endian); | |
4494 | Insn insn = addis_3_13; | |
4495 | if (size == 32) | |
4496 | insn = addis_3_2; | |
4497 | elfcpp::Swap<32, big_endian>::writeval(iview, insn); | |
4498 | r_type = elfcpp::R_POWERPC_TPREL16_HA; | |
7404fe1b | 4499 | value = dtp_offset; |
dd93cd0a AM |
4500 | } |
4501 | else | |
4502 | { | |
4503 | Insn* iview = reinterpret_cast<Insn*>(view - 2 * big_endian); | |
4504 | Insn insn = nop; | |
4505 | elfcpp::Swap<32, big_endian>::writeval(iview, insn); | |
4506 | r_type = elfcpp::R_POWERPC_NONE; | |
4507 | } | |
4508 | } | |
4509 | } | |
4510 | else if (r_type == elfcpp::R_POWERPC_GOT_DTPREL16 | |
4511 | || r_type == elfcpp::R_POWERPC_GOT_DTPREL16_LO | |
4512 | || r_type == elfcpp::R_POWERPC_GOT_DTPREL16_HI | |
4513 | || r_type == elfcpp::R_POWERPC_GOT_DTPREL16_HA) | |
4514 | { | |
4515 | // Accesses relative to a local dynamic sequence address, | |
4516 | // no optimisation here. | |
4517 | if (gsym != NULL) | |
4518 | { | |
4519 | gold_assert(gsym->has_got_offset(GOT_TYPE_DTPREL)); | |
4520 | value = gsym->got_offset(GOT_TYPE_DTPREL); | |
4521 | } | |
4522 | else | |
4523 | { | |
4524 | unsigned int r_sym = elfcpp::elf_r_sym<size>(rela.get_r_info()); | |
4525 | gold_assert(object->local_has_got_offset(r_sym, GOT_TYPE_DTPREL)); | |
4526 | value = object->local_got_offset(r_sym, GOT_TYPE_DTPREL); | |
4527 | } | |
4528 | value -= target->got_section()->got_base_offset(object); | |
4529 | } | |
4530 | else if (r_type == elfcpp::R_POWERPC_GOT_TPREL16 | |
4531 | || r_type == elfcpp::R_POWERPC_GOT_TPREL16_LO | |
4532 | || r_type == elfcpp::R_POWERPC_GOT_TPREL16_HI | |
4533 | || r_type == elfcpp::R_POWERPC_GOT_TPREL16_HA) | |
4534 | { | |
4535 | // First instruction of initial exec sequence. | |
4536 | const bool final = gsym == NULL || gsym->final_value_is_known(); | |
4537 | const tls::Tls_optimization tls_type = target->optimize_tls_ie(final); | |
4538 | if (tls_type == tls::TLSOPT_NONE) | |
4539 | { | |
4540 | if (gsym != NULL) | |
4541 | { | |
4542 | gold_assert(gsym->has_got_offset(GOT_TYPE_TPREL)); | |
4543 | value = gsym->got_offset(GOT_TYPE_TPREL); | |
4544 | } | |
4545 | else | |
4546 | { | |
4547 | unsigned int r_sym = elfcpp::elf_r_sym<size>(rela.get_r_info()); | |
4548 | gold_assert(object->local_has_got_offset(r_sym, GOT_TYPE_TPREL)); | |
4549 | value = object->local_got_offset(r_sym, GOT_TYPE_TPREL); | |
4550 | } | |
4551 | value -= target->got_section()->got_base_offset(object); | |
4552 | } | |
4553 | else | |
4554 | { | |
4555 | gold_assert(tls_type == tls::TLSOPT_TO_LE); | |
4556 | if (r_type == elfcpp::R_POWERPC_GOT_TPREL16 | |
4557 | || r_type == elfcpp::R_POWERPC_GOT_TPREL16_LO) | |
4558 | { | |
4559 | Insn* iview = reinterpret_cast<Insn*>(view - 2 * big_endian); | |
4560 | Insn insn = elfcpp::Swap<32, big_endian>::readval(iview); | |
4561 | insn &= (1 << 26) - (1 << 21); // extract rt from ld | |
4562 | if (size == 32) | |
4563 | insn |= addis_0_2; | |
4564 | else | |
4565 | insn |= addis_0_13; | |
4566 | elfcpp::Swap<32, big_endian>::writeval(iview, insn); | |
4567 | r_type = elfcpp::R_POWERPC_TPREL16_HA; | |
4568 | value = psymval->value(object, rela.get_r_addend()); | |
4569 | } | |
4570 | else | |
4571 | { | |
4572 | Insn* iview = reinterpret_cast<Insn*>(view - 2 * big_endian); | |
4573 | Insn insn = nop; | |
4574 | elfcpp::Swap<32, big_endian>::writeval(iview, insn); | |
4575 | r_type = elfcpp::R_POWERPC_NONE; | |
4576 | } | |
4577 | } | |
4578 | } | |
4579 | else if ((size == 64 && r_type == elfcpp::R_PPC64_TLSGD) | |
4580 | || (size == 32 && r_type == elfcpp::R_PPC_TLSGD)) | |
4581 | { | |
4582 | // Second instruction of a global dynamic sequence, | |
4583 | // the __tls_get_addr call | |
4584 | this->call_tls_get_addr_ = CALL_EXPECTED; | |
4585 | const bool final = gsym == NULL || gsym->final_value_is_known(); | |
4586 | const tls::Tls_optimization tls_type = target->optimize_tls_gd(final); | |
4587 | if (tls_type != tls::TLSOPT_NONE) | |
4588 | { | |
4589 | if (tls_type == tls::TLSOPT_TO_IE) | |
4590 | { | |
4591 | Insn* iview = reinterpret_cast<Insn*>(view); | |
4592 | Insn insn = add_3_3_13; | |
4593 | if (size == 32) | |
4594 | insn = add_3_3_2; | |
4595 | elfcpp::Swap<32, big_endian>::writeval(iview, insn); | |
4596 | r_type = elfcpp::R_POWERPC_NONE; | |
4597 | } | |
4598 | else | |
4599 | { | |
4600 | Insn* iview = reinterpret_cast<Insn*>(view); | |
4601 | Insn insn = addi_3_3; | |
4602 | elfcpp::Swap<32, big_endian>::writeval(iview, insn); | |
4603 | r_type = elfcpp::R_POWERPC_TPREL16_LO; | |
4604 | view += 2 * big_endian; | |
4605 | value = psymval->value(object, rela.get_r_addend()); | |
4606 | } | |
4607 | this->call_tls_get_addr_ = CALL_SKIP; | |
4608 | } | |
4609 | } | |
4610 | else if ((size == 64 && r_type == elfcpp::R_PPC64_TLSLD) | |
4611 | || (size == 32 && r_type == elfcpp::R_PPC_TLSLD)) | |
4612 | { | |
4613 | // Second instruction of a local dynamic sequence, | |
4614 | // the __tls_get_addr call | |
4615 | this->call_tls_get_addr_ = CALL_EXPECTED; | |
4616 | const tls::Tls_optimization tls_type = target->optimize_tls_ld(); | |
4617 | if (tls_type == tls::TLSOPT_TO_LE) | |
4618 | { | |
4619 | Insn* iview = reinterpret_cast<Insn*>(view); | |
4620 | Insn insn = addi_3_3; | |
4621 | elfcpp::Swap<32, big_endian>::writeval(iview, insn); | |
4622 | this->call_tls_get_addr_ = CALL_SKIP; | |
4623 | r_type = elfcpp::R_POWERPC_TPREL16_LO; | |
4624 | view += 2 * big_endian; | |
7404fe1b | 4625 | value = dtp_offset; |
dd93cd0a AM |
4626 | } |
4627 | } | |
4628 | else if (r_type == elfcpp::R_POWERPC_TLS) | |
4629 | { | |
4630 | // Second instruction of an initial exec sequence | |
4631 | const bool final = gsym == NULL || gsym->final_value_is_known(); | |
4632 | const tls::Tls_optimization tls_type = target->optimize_tls_ie(final); | |
4633 | if (tls_type == tls::TLSOPT_TO_LE) | |
4634 | { | |
4635 | Insn* iview = reinterpret_cast<Insn*>(view); | |
4636 | Insn insn = elfcpp::Swap<32, big_endian>::readval(iview); | |
4637 | unsigned int reg = size == 32 ? 2 : 13; | |
4638 | insn = at_tls_transform(insn, reg); | |
4639 | gold_assert(insn != 0); | |
4640 | elfcpp::Swap<32, big_endian>::writeval(iview, insn); | |
4641 | r_type = elfcpp::R_POWERPC_TPREL16_LO; | |
4642 | view += 2 * big_endian; | |
4643 | value = psymval->value(object, rela.get_r_addend()); | |
4644 | } | |
4645 | } | |
c9824451 | 4646 | else if (!has_plt_value) |
cf43a2fe | 4647 | { |
dd93cd0a | 4648 | Address addend = 0; |
3ea0a085 | 4649 | unsigned int dest_shndx; |
cf43a2fe AM |
4650 | if (r_type != elfcpp::R_PPC_PLTREL24) |
4651 | addend = rela.get_r_addend(); | |
c9824451 | 4652 | value = psymval->value(object, addend); |
dd93cd0a | 4653 | if (size == 64 && is_branch_reloc(r_type)) |
3ea0a085 | 4654 | value = target->symval_for_branch(value, gsym, object, &dest_shndx); |
42cacb20 DE |
4655 | } |
4656 | ||
42cacb20 DE |
4657 | switch (r_type) |
4658 | { | |
dd93cd0a AM |
4659 | case elfcpp::R_PPC64_REL64: |
4660 | case elfcpp::R_POWERPC_REL32: | |
4661 | case elfcpp::R_POWERPC_REL24: | |
4662 | case elfcpp::R_PPC_PLTREL24: | |
4663 | case elfcpp::R_PPC_LOCAL24PC: | |
4664 | case elfcpp::R_POWERPC_REL16: | |
4665 | case elfcpp::R_POWERPC_REL16_LO: | |
4666 | case elfcpp::R_POWERPC_REL16_HI: | |
4667 | case elfcpp::R_POWERPC_REL16_HA: | |
4668 | case elfcpp::R_POWERPC_REL14: | |
4669 | case elfcpp::R_POWERPC_REL14_BRTAKEN: | |
4670 | case elfcpp::R_POWERPC_REL14_BRNTAKEN: | |
4671 | value -= address; | |
4672 | break; | |
4673 | ||
42cacb20 DE |
4674 | case elfcpp::R_PPC64_TOC16: |
4675 | case elfcpp::R_PPC64_TOC16_LO: | |
4676 | case elfcpp::R_PPC64_TOC16_HI: | |
4677 | case elfcpp::R_PPC64_TOC16_HA: | |
4678 | case elfcpp::R_PPC64_TOC16_DS: | |
4679 | case elfcpp::R_PPC64_TOC16_LO_DS: | |
cf43a2fe | 4680 | // Subtract the TOC base address. |
c9269dff | 4681 | value -= (target->got_section()->output_section()->address() |
dd93cd0a | 4682 | + object->toc_base_offset()); |
42cacb20 DE |
4683 | break; |
4684 | ||
cf43a2fe AM |
4685 | case elfcpp::R_POWERPC_SECTOFF: |
4686 | case elfcpp::R_POWERPC_SECTOFF_LO: | |
4687 | case elfcpp::R_POWERPC_SECTOFF_HI: | |
4688 | case elfcpp::R_POWERPC_SECTOFF_HA: | |
4689 | case elfcpp::R_PPC64_SECTOFF_DS: | |
4690 | case elfcpp::R_PPC64_SECTOFF_LO_DS: | |
4691 | if (os != NULL) | |
4692 | value -= os->address(); | |
42cacb20 DE |
4693 | break; |
4694 | ||
dd93cd0a AM |
4695 | case elfcpp::R_PPC64_TPREL16_DS: |
4696 | case elfcpp::R_PPC64_TPREL16_LO_DS: | |
4697 | if (size != 64) | |
4698 | // R_PPC_TLSGD and R_PPC_TLSLD | |
4699 | break; | |
4700 | case elfcpp::R_POWERPC_TPREL16: | |
4701 | case elfcpp::R_POWERPC_TPREL16_LO: | |
4702 | case elfcpp::R_POWERPC_TPREL16_HI: | |
4703 | case elfcpp::R_POWERPC_TPREL16_HA: | |
4704 | case elfcpp::R_POWERPC_TPREL: | |
4705 | case elfcpp::R_PPC64_TPREL16_HIGHER: | |
4706 | case elfcpp::R_PPC64_TPREL16_HIGHERA: | |
4707 | case elfcpp::R_PPC64_TPREL16_HIGHEST: | |
4708 | case elfcpp::R_PPC64_TPREL16_HIGHESTA: | |
4709 | // tls symbol values are relative to tls_segment()->vaddr() | |
4710 | value -= tp_offset; | |
4711 | break; | |
4712 | ||
4713 | case elfcpp::R_PPC64_DTPREL16_DS: | |
4714 | case elfcpp::R_PPC64_DTPREL16_LO_DS: | |
4715 | case elfcpp::R_PPC64_DTPREL16_HIGHER: | |
4716 | case elfcpp::R_PPC64_DTPREL16_HIGHERA: | |
4717 | case elfcpp::R_PPC64_DTPREL16_HIGHEST: | |
4718 | case elfcpp::R_PPC64_DTPREL16_HIGHESTA: | |
4719 | if (size != 64) | |
4720 | // R_PPC_EMB_NADDR32, R_PPC_EMB_NADDR16, R_PPC_EMB_NADDR16_LO | |
4721 | // R_PPC_EMB_NADDR16_HI, R_PPC_EMB_NADDR16_HA, R_PPC_EMB_SDAI16 | |
4722 | break; | |
4723 | case elfcpp::R_POWERPC_DTPREL16: | |
4724 | case elfcpp::R_POWERPC_DTPREL16_LO: | |
4725 | case elfcpp::R_POWERPC_DTPREL16_HI: | |
4726 | case elfcpp::R_POWERPC_DTPREL16_HA: | |
4727 | case elfcpp::R_POWERPC_DTPREL: | |
4728 | // tls symbol values are relative to tls_segment()->vaddr() | |
4729 | value -= dtp_offset; | |
4730 | break; | |
4731 | ||
42cacb20 DE |
4732 | default: |
4733 | break; | |
4734 | } | |
4735 | ||
dd93cd0a | 4736 | Insn branch_bit = 0; |
42cacb20 DE |
4737 | switch (r_type) |
4738 | { | |
dd93cd0a AM |
4739 | case elfcpp::R_POWERPC_ADDR14_BRTAKEN: |
4740 | case elfcpp::R_POWERPC_REL14_BRTAKEN: | |
4741 | branch_bit = 1 << 21; | |
4742 | case elfcpp::R_POWERPC_ADDR14_BRNTAKEN: | |
4743 | case elfcpp::R_POWERPC_REL14_BRNTAKEN: | |
4744 | { | |
4745 | Insn* iview = reinterpret_cast<Insn*>(view); | |
4746 | Insn insn = elfcpp::Swap<32, big_endian>::readval(iview); | |
4747 | insn &= ~(1 << 21); | |
4748 | insn |= branch_bit; | |
4749 | if (this->is_isa_v2) | |
4750 | { | |
4751 | // Set 'a' bit. This is 0b00010 in BO field for branch | |
4752 | // on CR(BI) insns (BO == 001at or 011at), and 0b01000 | |
4753 | // for branch on CTR insns (BO == 1a00t or 1a01t). | |
4754 | if ((insn & (0x14 << 21)) == (0x04 << 21)) | |
4755 | insn |= 0x02 << 21; | |
4756 | else if ((insn & (0x14 << 21)) == (0x10 << 21)) | |
4757 | insn |= 0x08 << 21; | |
4758 | else | |
4759 | break; | |
4760 | } | |
4761 | else | |
4762 | { | |
4763 | // Invert 'y' bit if not the default. | |
4764 | if (static_cast<Signed_address>(value) < 0) | |
4765 | insn ^= 1 << 21; | |
4766 | } | |
4767 | elfcpp::Swap<32, big_endian>::writeval(iview, insn); | |
4768 | } | |
4769 | break; | |
4770 | ||
4771 | default: | |
4772 | break; | |
4773 | } | |
4774 | ||
f4baf0d4 | 4775 | typename Reloc::Overflow_check overflow = Reloc::CHECK_NONE; |
dd93cd0a AM |
4776 | switch (r_type) |
4777 | { | |
4778 | case elfcpp::R_POWERPC_ADDR32: | |
4779 | case elfcpp::R_POWERPC_UADDR32: | |
4780 | if (size == 64) | |
f4baf0d4 | 4781 | overflow = Reloc::CHECK_BITFIELD; |
42cacb20 DE |
4782 | break; |
4783 | ||
4784 | case elfcpp::R_POWERPC_REL32: | |
dd93cd0a | 4785 | if (size == 64) |
f4baf0d4 | 4786 | overflow = Reloc::CHECK_SIGNED; |
dd93cd0a AM |
4787 | break; |
4788 | ||
4789 | case elfcpp::R_POWERPC_ADDR24: | |
4790 | case elfcpp::R_POWERPC_ADDR16: | |
4791 | case elfcpp::R_POWERPC_UADDR16: | |
4792 | case elfcpp::R_PPC64_ADDR16_DS: | |
4793 | case elfcpp::R_POWERPC_ADDR14: | |
4794 | case elfcpp::R_POWERPC_ADDR14_BRTAKEN: | |
4795 | case elfcpp::R_POWERPC_ADDR14_BRNTAKEN: | |
f4baf0d4 | 4796 | overflow = Reloc::CHECK_BITFIELD; |
42cacb20 DE |
4797 | break; |
4798 | ||
4799 | case elfcpp::R_POWERPC_REL24: | |
42cacb20 | 4800 | case elfcpp::R_PPC_PLTREL24: |
cf43a2fe | 4801 | case elfcpp::R_PPC_LOCAL24PC: |
dd93cd0a AM |
4802 | case elfcpp::R_POWERPC_REL16: |
4803 | case elfcpp::R_PPC64_TOC16: | |
4804 | case elfcpp::R_POWERPC_GOT16: | |
4805 | case elfcpp::R_POWERPC_SECTOFF: | |
4806 | case elfcpp::R_POWERPC_TPREL16: | |
4807 | case elfcpp::R_POWERPC_DTPREL16: | |
4808 | case elfcpp::R_PPC64_TPREL16_DS: | |
4809 | case elfcpp::R_PPC64_DTPREL16_DS: | |
4810 | case elfcpp::R_PPC64_TOC16_DS: | |
4811 | case elfcpp::R_PPC64_GOT16_DS: | |
4812 | case elfcpp::R_PPC64_SECTOFF_DS: | |
4813 | case elfcpp::R_POWERPC_REL14: | |
4814 | case elfcpp::R_POWERPC_REL14_BRTAKEN: | |
4815 | case elfcpp::R_POWERPC_REL14_BRNTAKEN: | |
4816 | case elfcpp::R_POWERPC_GOT_TLSGD16: | |
4817 | case elfcpp::R_POWERPC_GOT_TLSLD16: | |
4818 | case elfcpp::R_POWERPC_GOT_TPREL16: | |
4819 | case elfcpp::R_POWERPC_GOT_DTPREL16: | |
f4baf0d4 | 4820 | overflow = Reloc::CHECK_SIGNED; |
42cacb20 | 4821 | break; |
dd93cd0a | 4822 | } |
42cacb20 | 4823 | |
3ea0a085 | 4824 | typename Powerpc_relocate_functions<size, big_endian>::Status status |
f4baf0d4 | 4825 | = Powerpc_relocate_functions<size, big_endian>::STATUS_OK; |
dd93cd0a AM |
4826 | switch (r_type) |
4827 | { | |
4828 | case elfcpp::R_POWERPC_NONE: | |
4829 | case elfcpp::R_POWERPC_TLS: | |
4830 | case elfcpp::R_POWERPC_GNU_VTINHERIT: | |
4831 | case elfcpp::R_POWERPC_GNU_VTENTRY: | |
4832 | case elfcpp::R_PPC_EMB_MRKREF: | |
42cacb20 DE |
4833 | break; |
4834 | ||
4835 | case elfcpp::R_PPC64_ADDR64: | |
dd93cd0a | 4836 | case elfcpp::R_PPC64_REL64: |
cf43a2fe | 4837 | case elfcpp::R_PPC64_TOC: |
dd93cd0a AM |
4838 | Reloc::addr64(view, value); |
4839 | break; | |
4840 | ||
4841 | case elfcpp::R_POWERPC_TPREL: | |
4842 | case elfcpp::R_POWERPC_DTPREL: | |
4843 | if (size == 64) | |
4844 | Reloc::addr64(view, value); | |
4845 | else | |
3ea0a085 | 4846 | status = Reloc::addr32(view, value, overflow); |
dd93cd0a AM |
4847 | break; |
4848 | ||
4849 | case elfcpp::R_PPC64_UADDR64: | |
4850 | Reloc::addr64_u(view, value); | |
42cacb20 DE |
4851 | break; |
4852 | ||
4853 | case elfcpp::R_POWERPC_ADDR32: | |
3ea0a085 | 4854 | status = Reloc::addr32(view, value, overflow); |
dd93cd0a AM |
4855 | break; |
4856 | ||
acc276d8 | 4857 | case elfcpp::R_POWERPC_REL32: |
dd93cd0a | 4858 | case elfcpp::R_POWERPC_UADDR32: |
3ea0a085 | 4859 | status = Reloc::addr32_u(view, value, overflow); |
dd93cd0a AM |
4860 | break; |
4861 | ||
4862 | case elfcpp::R_POWERPC_ADDR24: | |
4863 | case elfcpp::R_POWERPC_REL24: | |
4864 | case elfcpp::R_PPC_PLTREL24: | |
4865 | case elfcpp::R_PPC_LOCAL24PC: | |
3ea0a085 | 4866 | status = Reloc::addr24(view, value, overflow); |
42cacb20 DE |
4867 | break; |
4868 | ||
dd93cd0a AM |
4869 | case elfcpp::R_POWERPC_GOT_DTPREL16: |
4870 | case elfcpp::R_POWERPC_GOT_DTPREL16_LO: | |
4871 | if (size == 64) | |
4872 | { | |
3ea0a085 | 4873 | status = Reloc::addr16_ds(view, value, overflow); |
dd93cd0a AM |
4874 | break; |
4875 | } | |
cf43a2fe | 4876 | case elfcpp::R_POWERPC_ADDR16: |
dd93cd0a | 4877 | case elfcpp::R_POWERPC_REL16: |
cf43a2fe | 4878 | case elfcpp::R_PPC64_TOC16: |
42cacb20 | 4879 | case elfcpp::R_POWERPC_GOT16: |
cf43a2fe | 4880 | case elfcpp::R_POWERPC_SECTOFF: |
dd93cd0a AM |
4881 | case elfcpp::R_POWERPC_TPREL16: |
4882 | case elfcpp::R_POWERPC_DTPREL16: | |
4883 | case elfcpp::R_POWERPC_GOT_TLSGD16: | |
4884 | case elfcpp::R_POWERPC_GOT_TLSLD16: | |
4885 | case elfcpp::R_POWERPC_GOT_TPREL16: | |
cf43a2fe | 4886 | case elfcpp::R_POWERPC_ADDR16_LO: |
dd93cd0a | 4887 | case elfcpp::R_POWERPC_REL16_LO: |
cf43a2fe | 4888 | case elfcpp::R_PPC64_TOC16_LO: |
42cacb20 | 4889 | case elfcpp::R_POWERPC_GOT16_LO: |
cf43a2fe | 4890 | case elfcpp::R_POWERPC_SECTOFF_LO: |
dd93cd0a AM |
4891 | case elfcpp::R_POWERPC_TPREL16_LO: |
4892 | case elfcpp::R_POWERPC_DTPREL16_LO: | |
4893 | case elfcpp::R_POWERPC_GOT_TLSGD16_LO: | |
4894 | case elfcpp::R_POWERPC_GOT_TLSLD16_LO: | |
4895 | case elfcpp::R_POWERPC_GOT_TPREL16_LO: | |
3ea0a085 | 4896 | status = Reloc::addr16(view, value, overflow); |
dd93cd0a AM |
4897 | break; |
4898 | ||
4899 | case elfcpp::R_POWERPC_UADDR16: | |
3ea0a085 | 4900 | status = Reloc::addr16_u(view, value, overflow); |
42cacb20 DE |
4901 | break; |
4902 | ||
cf43a2fe | 4903 | case elfcpp::R_POWERPC_ADDR16_HI: |
dd93cd0a | 4904 | case elfcpp::R_POWERPC_REL16_HI: |
cf43a2fe | 4905 | case elfcpp::R_PPC64_TOC16_HI: |
42cacb20 | 4906 | case elfcpp::R_POWERPC_GOT16_HI: |
cf43a2fe | 4907 | case elfcpp::R_POWERPC_SECTOFF_HI: |
dd93cd0a AM |
4908 | case elfcpp::R_POWERPC_TPREL16_HI: |
4909 | case elfcpp::R_POWERPC_DTPREL16_HI: | |
4910 | case elfcpp::R_POWERPC_GOT_TLSGD16_HI: | |
4911 | case elfcpp::R_POWERPC_GOT_TLSLD16_HI: | |
4912 | case elfcpp::R_POWERPC_GOT_TPREL16_HI: | |
4913 | case elfcpp::R_POWERPC_GOT_DTPREL16_HI: | |
4914 | Reloc::addr16_hi(view, value); | |
42cacb20 DE |
4915 | break; |
4916 | ||
cf43a2fe | 4917 | case elfcpp::R_POWERPC_ADDR16_HA: |
dd93cd0a | 4918 | case elfcpp::R_POWERPC_REL16_HA: |
cf43a2fe | 4919 | case elfcpp::R_PPC64_TOC16_HA: |
42cacb20 | 4920 | case elfcpp::R_POWERPC_GOT16_HA: |
cf43a2fe | 4921 | case elfcpp::R_POWERPC_SECTOFF_HA: |
dd93cd0a AM |
4922 | case elfcpp::R_POWERPC_TPREL16_HA: |
4923 | case elfcpp::R_POWERPC_DTPREL16_HA: | |
4924 | case elfcpp::R_POWERPC_GOT_TLSGD16_HA: | |
4925 | case elfcpp::R_POWERPC_GOT_TLSLD16_HA: | |
4926 | case elfcpp::R_POWERPC_GOT_TPREL16_HA: | |
4927 | case elfcpp::R_POWERPC_GOT_DTPREL16_HA: | |
4928 | Reloc::addr16_ha(view, value); | |
42cacb20 DE |
4929 | break; |
4930 | ||
dd93cd0a AM |
4931 | case elfcpp::R_PPC64_DTPREL16_HIGHER: |
4932 | if (size == 32) | |
4933 | // R_PPC_EMB_NADDR16_LO | |
4934 | goto unsupp; | |
4935 | case elfcpp::R_PPC64_ADDR16_HIGHER: | |
4936 | case elfcpp::R_PPC64_TPREL16_HIGHER: | |
4937 | Reloc::addr16_hi2(view, value); | |
42cacb20 DE |
4938 | break; |
4939 | ||
dd93cd0a AM |
4940 | case elfcpp::R_PPC64_DTPREL16_HIGHERA: |
4941 | if (size == 32) | |
4942 | // R_PPC_EMB_NADDR16_HI | |
4943 | goto unsupp; | |
4944 | case elfcpp::R_PPC64_ADDR16_HIGHERA: | |
4945 | case elfcpp::R_PPC64_TPREL16_HIGHERA: | |
4946 | Reloc::addr16_ha2(view, value); | |
42cacb20 DE |
4947 | break; |
4948 | ||
dd93cd0a AM |
4949 | case elfcpp::R_PPC64_DTPREL16_HIGHEST: |
4950 | if (size == 32) | |
4951 | // R_PPC_EMB_NADDR16_HA | |
4952 | goto unsupp; | |
4953 | case elfcpp::R_PPC64_ADDR16_HIGHEST: | |
4954 | case elfcpp::R_PPC64_TPREL16_HIGHEST: | |
4955 | Reloc::addr16_hi3(view, value); | |
42cacb20 DE |
4956 | break; |
4957 | ||
dd93cd0a AM |
4958 | case elfcpp::R_PPC64_DTPREL16_HIGHESTA: |
4959 | if (size == 32) | |
4960 | // R_PPC_EMB_SDAI16 | |
4961 | goto unsupp; | |
4962 | case elfcpp::R_PPC64_ADDR16_HIGHESTA: | |
4963 | case elfcpp::R_PPC64_TPREL16_HIGHESTA: | |
4964 | Reloc::addr16_ha3(view, value); | |
4965 | break; | |
4966 | ||
4967 | case elfcpp::R_PPC64_DTPREL16_DS: | |
4968 | case elfcpp::R_PPC64_DTPREL16_LO_DS: | |
4969 | if (size == 32) | |
4970 | // R_PPC_EMB_NADDR32, R_PPC_EMB_NADDR16 | |
4971 | goto unsupp; | |
4972 | case elfcpp::R_PPC64_TPREL16_DS: | |
4973 | case elfcpp::R_PPC64_TPREL16_LO_DS: | |
4974 | if (size == 32) | |
4975 | // R_PPC_TLSGD, R_PPC_TLSLD | |
4976 | break; | |
cf43a2fe AM |
4977 | case elfcpp::R_PPC64_ADDR16_DS: |
4978 | case elfcpp::R_PPC64_ADDR16_LO_DS: | |
42cacb20 DE |
4979 | case elfcpp::R_PPC64_TOC16_DS: |
4980 | case elfcpp::R_PPC64_TOC16_LO_DS: | |
cf43a2fe AM |
4981 | case elfcpp::R_PPC64_GOT16_DS: |
4982 | case elfcpp::R_PPC64_GOT16_LO_DS: | |
4983 | case elfcpp::R_PPC64_SECTOFF_DS: | |
4984 | case elfcpp::R_PPC64_SECTOFF_LO_DS: | |
3ea0a085 | 4985 | status = Reloc::addr16_ds(view, value, overflow); |
dd93cd0a AM |
4986 | break; |
4987 | ||
4988 | case elfcpp::R_POWERPC_ADDR14: | |
4989 | case elfcpp::R_POWERPC_ADDR14_BRTAKEN: | |
4990 | case elfcpp::R_POWERPC_ADDR14_BRNTAKEN: | |
4991 | case elfcpp::R_POWERPC_REL14: | |
4992 | case elfcpp::R_POWERPC_REL14_BRTAKEN: | |
4993 | case elfcpp::R_POWERPC_REL14_BRNTAKEN: | |
3ea0a085 | 4994 | status = Reloc::addr14(view, value, overflow); |
42cacb20 DE |
4995 | break; |
4996 | ||
4997 | case elfcpp::R_POWERPC_COPY: | |
4998 | case elfcpp::R_POWERPC_GLOB_DAT: | |
4999 | case elfcpp::R_POWERPC_JMP_SLOT: | |
5000 | case elfcpp::R_POWERPC_RELATIVE: | |
42cacb20 | 5001 | case elfcpp::R_POWERPC_DTPMOD: |
dd93cd0a AM |
5002 | case elfcpp::R_PPC64_JMP_IREL: |
5003 | case elfcpp::R_POWERPC_IRELATIVE: | |
42cacb20 DE |
5004 | gold_error_at_location(relinfo, relnum, rela.get_r_offset(), |
5005 | _("unexpected reloc %u in object file"), | |
5006 | r_type); | |
5007 | break; | |
5008 | ||
dd93cd0a AM |
5009 | case elfcpp::R_PPC_EMB_SDA21: |
5010 | if (size == 32) | |
5011 | goto unsupp; | |
5012 | else | |
5013 | { | |
5014 | // R_PPC64_TOCSAVE. For the time being this can be ignored. | |
5015 | } | |
5016 | break; | |
5017 | ||
5018 | case elfcpp::R_PPC_EMB_SDA2I16: | |
5019 | case elfcpp::R_PPC_EMB_SDA2REL: | |
5020 | if (size == 32) | |
5021 | goto unsupp; | |
5022 | // R_PPC64_TLSGD, R_PPC64_TLSLD | |
6ce78956 AM |
5023 | break; |
5024 | ||
dd93cd0a AM |
5025 | case elfcpp::R_POWERPC_PLT32: |
5026 | case elfcpp::R_POWERPC_PLTREL32: | |
5027 | case elfcpp::R_POWERPC_PLT16_LO: | |
5028 | case elfcpp::R_POWERPC_PLT16_HI: | |
5029 | case elfcpp::R_POWERPC_PLT16_HA: | |
5030 | case elfcpp::R_PPC_SDAREL16: | |
5031 | case elfcpp::R_POWERPC_ADDR30: | |
5032 | case elfcpp::R_PPC64_PLT64: | |
5033 | case elfcpp::R_PPC64_PLTREL64: | |
5034 | case elfcpp::R_PPC64_PLTGOT16: | |
5035 | case elfcpp::R_PPC64_PLTGOT16_LO: | |
5036 | case elfcpp::R_PPC64_PLTGOT16_HI: | |
5037 | case elfcpp::R_PPC64_PLTGOT16_HA: | |
5038 | case elfcpp::R_PPC64_PLT16_LO_DS: | |
5039 | case elfcpp::R_PPC64_PLTGOT16_DS: | |
5040 | case elfcpp::R_PPC64_PLTGOT16_LO_DS: | |
5041 | case elfcpp::R_PPC_EMB_RELSEC16: | |
5042 | case elfcpp::R_PPC_EMB_RELST_LO: | |
5043 | case elfcpp::R_PPC_EMB_RELST_HI: | |
5044 | case elfcpp::R_PPC_EMB_RELST_HA: | |
5045 | case elfcpp::R_PPC_EMB_BIT_FLD: | |
5046 | case elfcpp::R_PPC_EMB_RELSDA: | |
5047 | case elfcpp::R_PPC_TOC16: | |
42cacb20 | 5048 | default: |
dd93cd0a | 5049 | unsupp: |
42cacb20 DE |
5050 | gold_error_at_location(relinfo, relnum, rela.get_r_offset(), |
5051 | _("unsupported reloc %u"), | |
5052 | r_type); | |
5053 | break; | |
5054 | } | |
f4baf0d4 | 5055 | if (status != Powerpc_relocate_functions<size, big_endian>::STATUS_OK) |
3ea0a085 AM |
5056 | gold_error_at_location(relinfo, relnum, rela.get_r_offset(), |
5057 | _("relocation overflow")); | |
42cacb20 DE |
5058 | |
5059 | return true; | |
5060 | } | |
5061 | ||
42cacb20 DE |
5062 | // Relocate section data. |
5063 | ||
5064 | template<int size, bool big_endian> | |
5065 | void | |
5066 | Target_powerpc<size, big_endian>::relocate_section( | |
d83ce4e3 AM |
5067 | const Relocate_info<size, big_endian>* relinfo, |
5068 | unsigned int sh_type, | |
5069 | const unsigned char* prelocs, | |
5070 | size_t reloc_count, | |
5071 | Output_section* output_section, | |
5072 | bool needs_special_offset_handling, | |
5073 | unsigned char* view, | |
c9269dff | 5074 | Address address, |
d83ce4e3 AM |
5075 | section_size_type view_size, |
5076 | const Reloc_symbol_changes* reloc_symbol_changes) | |
42cacb20 DE |
5077 | { |
5078 | typedef Target_powerpc<size, big_endian> Powerpc; | |
5079 | typedef typename Target_powerpc<size, big_endian>::Relocate Powerpc_relocate; | |
168a4726 AM |
5080 | typedef typename Target_powerpc<size, big_endian>::Relocate_comdat_behavior |
5081 | Powerpc_comdat_behavior; | |
42cacb20 DE |
5082 | |
5083 | gold_assert(sh_type == elfcpp::SHT_RELA); | |
5084 | ||
5085 | gold::relocate_section<size, big_endian, Powerpc, elfcpp::SHT_RELA, | |
168a4726 | 5086 | Powerpc_relocate, Powerpc_comdat_behavior>( |
42cacb20 DE |
5087 | relinfo, |
5088 | this, | |
5089 | prelocs, | |
5090 | reloc_count, | |
5091 | output_section, | |
5092 | needs_special_offset_handling, | |
5093 | view, | |
5094 | address, | |
364c7fa5 ILT |
5095 | view_size, |
5096 | reloc_symbol_changes); | |
42cacb20 DE |
5097 | } |
5098 | ||
cf43a2fe | 5099 | class Powerpc_scan_relocatable_reloc |
42cacb20 | 5100 | { |
cf43a2fe AM |
5101 | public: |
5102 | // Return the strategy to use for a local symbol which is not a | |
5103 | // section symbol, given the relocation type. | |
5104 | inline Relocatable_relocs::Reloc_strategy | |
5105 | local_non_section_strategy(unsigned int r_type, Relobj*, unsigned int r_sym) | |
5106 | { | |
5107 | if (r_type == 0 && r_sym == 0) | |
5108 | return Relocatable_relocs::RELOC_DISCARD; | |
5109 | return Relocatable_relocs::RELOC_COPY; | |
5110 | } | |
5111 | ||
5112 | // Return the strategy to use for a local symbol which is a section | |
5113 | // symbol, given the relocation type. | |
5114 | inline Relocatable_relocs::Reloc_strategy | |
5115 | local_section_strategy(unsigned int, Relobj*) | |
5116 | { | |
5117 | return Relocatable_relocs::RELOC_ADJUST_FOR_SECTION_RELA; | |
5118 | } | |
5119 | ||
5120 | // Return the strategy to use for a global symbol, given the | |
5121 | // relocation type, the object, and the symbol index. | |
5122 | inline Relocatable_relocs::Reloc_strategy | |
5123 | global_strategy(unsigned int r_type, Relobj*, unsigned int) | |
5124 | { | |
5125 | if (r_type == elfcpp::R_PPC_PLTREL24) | |
5126 | return Relocatable_relocs::RELOC_SPECIAL; | |
5127 | return Relocatable_relocs::RELOC_COPY; | |
5128 | } | |
5129 | }; | |
42cacb20 DE |
5130 | |
5131 | // Scan the relocs during a relocatable link. | |
5132 | ||
5133 | template<int size, bool big_endian> | |
5134 | void | |
5135 | Target_powerpc<size, big_endian>::scan_relocatable_relocs( | |
d83ce4e3 AM |
5136 | Symbol_table* symtab, |
5137 | Layout* layout, | |
5138 | Sized_relobj_file<size, big_endian>* object, | |
5139 | unsigned int data_shndx, | |
5140 | unsigned int sh_type, | |
5141 | const unsigned char* prelocs, | |
5142 | size_t reloc_count, | |
5143 | Output_section* output_section, | |
5144 | bool needs_special_offset_handling, | |
5145 | size_t local_symbol_count, | |
5146 | const unsigned char* plocal_symbols, | |
5147 | Relocatable_relocs* rr) | |
42cacb20 DE |
5148 | { |
5149 | gold_assert(sh_type == elfcpp::SHT_RELA); | |
5150 | ||
42cacb20 | 5151 | gold::scan_relocatable_relocs<size, big_endian, elfcpp::SHT_RELA, |
d83ce4e3 | 5152 | Powerpc_scan_relocatable_reloc>( |
42cacb20 DE |
5153 | symtab, |
5154 | layout, | |
5155 | object, | |
5156 | data_shndx, | |
5157 | prelocs, | |
5158 | reloc_count, | |
5159 | output_section, | |
5160 | needs_special_offset_handling, | |
5161 | local_symbol_count, | |
5162 | plocal_symbols, | |
5163 | rr); | |
5164 | } | |
5165 | ||
7404fe1b | 5166 | // Emit relocations for a section. |
dd93cd0a AM |
5167 | // This is a modified version of the function by the same name in |
5168 | // target-reloc.h. Using relocate_special_relocatable for | |
5169 | // R_PPC_PLTREL24 would require duplication of the entire body of the | |
5170 | // loop, so we may as well duplicate the whole thing. | |
42cacb20 DE |
5171 | |
5172 | template<int size, bool big_endian> | |
5173 | void | |
7404fe1b | 5174 | Target_powerpc<size, big_endian>::relocate_relocs( |
42cacb20 DE |
5175 | const Relocate_info<size, big_endian>* relinfo, |
5176 | unsigned int sh_type, | |
5177 | const unsigned char* prelocs, | |
5178 | size_t reloc_count, | |
5179 | Output_section* output_section, | |
5180 | off_t offset_in_output_section, | |
5181 | const Relocatable_relocs* rr, | |
cf43a2fe | 5182 | unsigned char*, |
dd93cd0a | 5183 | Address view_address, |
cf43a2fe | 5184 | section_size_type, |
42cacb20 DE |
5185 | unsigned char* reloc_view, |
5186 | section_size_type reloc_view_size) | |
5187 | { | |
5188 | gold_assert(sh_type == elfcpp::SHT_RELA); | |
5189 | ||
cf43a2fe AM |
5190 | typedef typename Reloc_types<elfcpp::SHT_RELA, size, big_endian>::Reloc |
5191 | Reltype; | |
5192 | typedef typename Reloc_types<elfcpp::SHT_RELA, size, big_endian>::Reloc_write | |
5193 | Reltype_write; | |
5194 | const int reloc_size | |
5195 | = Reloc_types<elfcpp::SHT_RELA, size, big_endian>::reloc_size; | |
cf43a2fe AM |
5196 | |
5197 | Powerpc_relobj<size, big_endian>* const object | |
5198 | = static_cast<Powerpc_relobj<size, big_endian>*>(relinfo->object); | |
5199 | const unsigned int local_count = object->local_symbol_count(); | |
5200 | unsigned int got2_shndx = object->got2_shndx(); | |
c9269dff | 5201 | Address got2_addend = 0; |
cf43a2fe | 5202 | if (got2_shndx != 0) |
c9269dff AM |
5203 | { |
5204 | got2_addend = object->get_output_section_offset(got2_shndx); | |
5205 | gold_assert(got2_addend != invalid_address); | |
5206 | } | |
cf43a2fe AM |
5207 | |
5208 | unsigned char* pwrite = reloc_view; | |
7404fe1b | 5209 | bool zap_next = false; |
cf43a2fe AM |
5210 | for (size_t i = 0; i < reloc_count; ++i, prelocs += reloc_size) |
5211 | { | |
5212 | Relocatable_relocs::Reloc_strategy strategy = rr->strategy(i); | |
5213 | if (strategy == Relocatable_relocs::RELOC_DISCARD) | |
5214 | continue; | |
5215 | ||
5216 | Reltype reloc(prelocs); | |
5217 | Reltype_write reloc_write(pwrite); | |
5218 | ||
7404fe1b | 5219 | Address offset = reloc.get_r_offset(); |
cf43a2fe | 5220 | typename elfcpp::Elf_types<size>::Elf_WXword r_info = reloc.get_r_info(); |
7404fe1b AM |
5221 | unsigned int r_sym = elfcpp::elf_r_sym<size>(r_info); |
5222 | unsigned int r_type = elfcpp::elf_r_type<size>(r_info); | |
5223 | const unsigned int orig_r_sym = r_sym; | |
5224 | typename elfcpp::Elf_types<size>::Elf_Swxword addend | |
5225 | = reloc.get_r_addend(); | |
5226 | const Symbol* gsym = NULL; | |
5227 | ||
5228 | if (zap_next) | |
5229 | { | |
5230 | // We could arrange to discard these and other relocs for | |
5231 | // tls optimised sequences in the strategy methods, but for | |
5232 | // now do as BFD ld does. | |
5233 | r_type = elfcpp::R_POWERPC_NONE; | |
5234 | zap_next = false; | |
5235 | } | |
cf43a2fe AM |
5236 | |
5237 | // Get the new symbol index. | |
cf43a2fe AM |
5238 | if (r_sym < local_count) |
5239 | { | |
5240 | switch (strategy) | |
5241 | { | |
5242 | case Relocatable_relocs::RELOC_COPY: | |
5243 | case Relocatable_relocs::RELOC_SPECIAL: | |
7404fe1b | 5244 | if (r_sym != 0) |
dd93cd0a | 5245 | { |
7404fe1b AM |
5246 | r_sym = object->symtab_index(r_sym); |
5247 | gold_assert(r_sym != -1U); | |
dd93cd0a | 5248 | } |
cf43a2fe AM |
5249 | break; |
5250 | ||
5251 | case Relocatable_relocs::RELOC_ADJUST_FOR_SECTION_RELA: | |
5252 | { | |
5253 | // We are adjusting a section symbol. We need to find | |
5254 | // the symbol table index of the section symbol for | |
5255 | // the output section corresponding to input section | |
5256 | // in which this symbol is defined. | |
5257 | gold_assert(r_sym < local_count); | |
5258 | bool is_ordinary; | |
5259 | unsigned int shndx = | |
5260 | object->local_symbol_input_shndx(r_sym, &is_ordinary); | |
5261 | gold_assert(is_ordinary); | |
5262 | Output_section* os = object->output_section(shndx); | |
5263 | gold_assert(os != NULL); | |
5264 | gold_assert(os->needs_symtab_index()); | |
7404fe1b | 5265 | r_sym = os->symtab_index(); |
cf43a2fe AM |
5266 | } |
5267 | break; | |
5268 | ||
5269 | default: | |
5270 | gold_unreachable(); | |
5271 | } | |
5272 | } | |
5273 | else | |
5274 | { | |
7404fe1b | 5275 | gsym = object->global_symbol(r_sym); |
cf43a2fe AM |
5276 | gold_assert(gsym != NULL); |
5277 | if (gsym->is_forwarder()) | |
5278 | gsym = relinfo->symtab->resolve_forwards(gsym); | |
5279 | ||
5280 | gold_assert(gsym->has_symtab_index()); | |
7404fe1b | 5281 | r_sym = gsym->symtab_index(); |
cf43a2fe AM |
5282 | } |
5283 | ||
5284 | // Get the new offset--the location in the output section where | |
5285 | // this relocation should be applied. | |
cf43a2fe | 5286 | if (static_cast<Address>(offset_in_output_section) != invalid_address) |
7404fe1b | 5287 | offset += offset_in_output_section; |
cf43a2fe AM |
5288 | else |
5289 | { | |
c9269dff AM |
5290 | section_offset_type sot_offset = |
5291 | convert_types<section_offset_type, Address>(offset); | |
cf43a2fe | 5292 | section_offset_type new_sot_offset = |
c9269dff AM |
5293 | output_section->output_offset(object, relinfo->data_shndx, |
5294 | sot_offset); | |
cf43a2fe | 5295 | gold_assert(new_sot_offset != -1); |
7404fe1b | 5296 | offset = new_sot_offset; |
cf43a2fe AM |
5297 | } |
5298 | ||
dd93cd0a AM |
5299 | // In an object file, r_offset is an offset within the section. |
5300 | // In an executable or dynamic object, generated by | |
5301 | // --emit-relocs, r_offset is an absolute address. | |
7404fe1b | 5302 | if (!parameters->options().relocatable()) |
dd93cd0a | 5303 | { |
7404fe1b | 5304 | offset += view_address; |
dd93cd0a | 5305 | if (static_cast<Address>(offset_in_output_section) != invalid_address) |
7404fe1b | 5306 | offset -= offset_in_output_section; |
dd93cd0a AM |
5307 | } |
5308 | ||
cf43a2fe | 5309 | // Handle the reloc addend based on the strategy. |
cf43a2fe AM |
5310 | if (strategy == Relocatable_relocs::RELOC_COPY) |
5311 | ; | |
5312 | else if (strategy == Relocatable_relocs::RELOC_ADJUST_FOR_SECTION_RELA) | |
5313 | { | |
7404fe1b | 5314 | const Symbol_value<size>* psymval = object->local_symbol(orig_r_sym); |
cf43a2fe AM |
5315 | addend = psymval->value(object, addend); |
5316 | } | |
5317 | else if (strategy == Relocatable_relocs::RELOC_SPECIAL) | |
5318 | { | |
5319 | if (addend >= 32768) | |
5320 | addend += got2_addend; | |
5321 | } | |
5322 | else | |
5323 | gold_unreachable(); | |
5324 | ||
7404fe1b AM |
5325 | if (!parameters->options().relocatable()) |
5326 | { | |
5327 | if (r_type == elfcpp::R_POWERPC_GOT_TLSGD16 | |
5328 | || r_type == elfcpp::R_POWERPC_GOT_TLSGD16_LO | |
5329 | || r_type == elfcpp::R_POWERPC_GOT_TLSGD16_HI | |
5330 | || r_type == elfcpp::R_POWERPC_GOT_TLSGD16_HA) | |
5331 | { | |
5332 | // First instruction of a global dynamic sequence, | |
5333 | // arg setup insn. | |
5334 | const bool final = gsym == NULL || gsym->final_value_is_known(); | |
5335 | switch (this->optimize_tls_gd(final)) | |
5336 | { | |
5337 | case tls::TLSOPT_TO_IE: | |
5338 | r_type += (elfcpp::R_POWERPC_GOT_TPREL16 | |
5339 | - elfcpp::R_POWERPC_GOT_TLSGD16); | |
5340 | break; | |
5341 | case tls::TLSOPT_TO_LE: | |
5342 | if (r_type == elfcpp::R_POWERPC_GOT_TLSGD16 | |
5343 | || r_type == elfcpp::R_POWERPC_GOT_TLSGD16_LO) | |
5344 | r_type = elfcpp::R_POWERPC_TPREL16_HA; | |
5345 | else | |
5346 | { | |
5347 | r_type = elfcpp::R_POWERPC_NONE; | |
5348 | offset -= 2 * big_endian; | |
5349 | } | |
5350 | break; | |
5351 | default: | |
5352 | break; | |
5353 | } | |
5354 | } | |
5355 | else if (r_type == elfcpp::R_POWERPC_GOT_TLSLD16 | |
5356 | || r_type == elfcpp::R_POWERPC_GOT_TLSLD16_LO | |
5357 | || r_type == elfcpp::R_POWERPC_GOT_TLSLD16_HI | |
5358 | || r_type == elfcpp::R_POWERPC_GOT_TLSLD16_HA) | |
5359 | { | |
5360 | // First instruction of a local dynamic sequence, | |
5361 | // arg setup insn. | |
5362 | if (this->optimize_tls_ld() == tls::TLSOPT_TO_LE) | |
5363 | { | |
5364 | if (r_type == elfcpp::R_POWERPC_GOT_TLSLD16 | |
5365 | || r_type == elfcpp::R_POWERPC_GOT_TLSLD16_LO) | |
5366 | { | |
5367 | r_type = elfcpp::R_POWERPC_TPREL16_HA; | |
5368 | const Output_section* os = relinfo->layout->tls_segment() | |
5369 | ->first_section(); | |
5370 | gold_assert(os != NULL); | |
5371 | gold_assert(os->needs_symtab_index()); | |
5372 | r_sym = os->symtab_index(); | |
5373 | addend = dtp_offset; | |
5374 | } | |
5375 | else | |
5376 | { | |
5377 | r_type = elfcpp::R_POWERPC_NONE; | |
5378 | offset -= 2 * big_endian; | |
5379 | } | |
5380 | } | |
5381 | } | |
5382 | else if (r_type == elfcpp::R_POWERPC_GOT_TPREL16 | |
5383 | || r_type == elfcpp::R_POWERPC_GOT_TPREL16_LO | |
5384 | || r_type == elfcpp::R_POWERPC_GOT_TPREL16_HI | |
5385 | || r_type == elfcpp::R_POWERPC_GOT_TPREL16_HA) | |
5386 | { | |
5387 | // First instruction of initial exec sequence. | |
5388 | const bool final = gsym == NULL || gsym->final_value_is_known(); | |
5389 | if (this->optimize_tls_ie(final) == tls::TLSOPT_TO_LE) | |
5390 | { | |
5391 | if (r_type == elfcpp::R_POWERPC_GOT_TPREL16 | |
5392 | || r_type == elfcpp::R_POWERPC_GOT_TPREL16_LO) | |
5393 | r_type = elfcpp::R_POWERPC_TPREL16_HA; | |
5394 | else | |
5395 | { | |
5396 | r_type = elfcpp::R_POWERPC_NONE; | |
5397 | offset -= 2 * big_endian; | |
5398 | } | |
5399 | } | |
5400 | } | |
5401 | else if ((size == 64 && r_type == elfcpp::R_PPC64_TLSGD) | |
5402 | || (size == 32 && r_type == elfcpp::R_PPC_TLSGD)) | |
5403 | { | |
5404 | // Second instruction of a global dynamic sequence, | |
5405 | // the __tls_get_addr call | |
5406 | const bool final = gsym == NULL || gsym->final_value_is_known(); | |
5407 | switch (this->optimize_tls_gd(final)) | |
5408 | { | |
5409 | case tls::TLSOPT_TO_IE: | |
5410 | r_type = elfcpp::R_POWERPC_NONE; | |
5411 | zap_next = true; | |
5412 | break; | |
5413 | case tls::TLSOPT_TO_LE: | |
5414 | r_type = elfcpp::R_POWERPC_TPREL16_LO; | |
5415 | offset += 2 * big_endian; | |
5416 | zap_next = true; | |
5417 | break; | |
5418 | default: | |
5419 | break; | |
5420 | } | |
5421 | } | |
5422 | else if ((size == 64 && r_type == elfcpp::R_PPC64_TLSLD) | |
5423 | || (size == 32 && r_type == elfcpp::R_PPC_TLSLD)) | |
5424 | { | |
5425 | // Second instruction of a local dynamic sequence, | |
5426 | // the __tls_get_addr call | |
5427 | if (this->optimize_tls_ld() == tls::TLSOPT_TO_LE) | |
5428 | { | |
5429 | const Output_section* os = relinfo->layout->tls_segment() | |
5430 | ->first_section(); | |
5431 | gold_assert(os != NULL); | |
5432 | gold_assert(os->needs_symtab_index()); | |
5433 | r_sym = os->symtab_index(); | |
5434 | addend = dtp_offset; | |
5435 | r_type = elfcpp::R_POWERPC_TPREL16_LO; | |
5436 | offset += 2 * big_endian; | |
5437 | zap_next = true; | |
5438 | } | |
5439 | } | |
5440 | else if (r_type == elfcpp::R_POWERPC_TLS) | |
5441 | { | |
5442 | // Second instruction of an initial exec sequence | |
5443 | const bool final = gsym == NULL || gsym->final_value_is_known(); | |
5444 | if (this->optimize_tls_ie(final) == tls::TLSOPT_TO_LE) | |
5445 | { | |
5446 | r_type = elfcpp::R_POWERPC_TPREL16_LO; | |
5447 | offset += 2 * big_endian; | |
5448 | } | |
5449 | } | |
5450 | } | |
5451 | ||
5452 | reloc_write.put_r_offset(offset); | |
5453 | reloc_write.put_r_info(elfcpp::elf_r_info<size>(r_sym, r_type)); | |
5454 | reloc_write.put_r_addend(addend); | |
cf43a2fe AM |
5455 | |
5456 | pwrite += reloc_size; | |
5457 | } | |
5458 | ||
5459 | gold_assert(static_cast<section_size_type>(pwrite - reloc_view) | |
5460 | == reloc_view_size); | |
42cacb20 DE |
5461 | } |
5462 | ||
5463 | // Return the value to use for a dynamic which requires special | |
5464 | // treatment. This is how we support equality comparisons of function | |
5465 | // pointers across shared library boundaries, as described in the | |
5466 | // processor specific ABI supplement. | |
5467 | ||
5468 | template<int size, bool big_endian> | |
5469 | uint64_t | |
5470 | Target_powerpc<size, big_endian>::do_dynsym_value(const Symbol* gsym) const | |
5471 | { | |
cf43a2fe AM |
5472 | if (size == 32) |
5473 | { | |
5474 | gold_assert(gsym->is_from_dynobj() && gsym->has_plt_offset()); | |
e5d5f5ed | 5475 | const Output_data_glink<size, big_endian>* glink = this->glink_section(); |
c9824451 AM |
5476 | unsigned int glink_index = glink->find_entry(gsym); |
5477 | return glink->address() + glink_index * glink->glink_entry_size(); | |
5478 | } | |
5479 | else | |
5480 | gold_unreachable(); | |
5481 | } | |
5482 | ||
5483 | // Return the PLT address to use for a local symbol. | |
5484 | template<int size, bool big_endian> | |
5485 | uint64_t | |
5486 | Target_powerpc<size, big_endian>::do_plt_address_for_local( | |
5487 | const Relobj* object, | |
5488 | unsigned int symndx) const | |
5489 | { | |
5490 | if (size == 32) | |
5491 | { | |
5492 | const Sized_relobj<size, big_endian>* relobj | |
5493 | = static_cast<const Sized_relobj<size, big_endian>*>(object); | |
5494 | const Output_data_glink<size, big_endian>* glink = this->glink_section(); | |
5495 | unsigned int glink_index = glink->find_entry(relobj->sized_relobj(), | |
5496 | symndx); | |
5497 | return glink->address() + glink_index * glink->glink_entry_size(); | |
5498 | } | |
5499 | else | |
5500 | gold_unreachable(); | |
5501 | } | |
5502 | ||
5503 | // Return the PLT address to use for a global symbol. | |
5504 | template<int size, bool big_endian> | |
5505 | uint64_t | |
5506 | Target_powerpc<size, big_endian>::do_plt_address_for_global( | |
5507 | const Symbol* gsym) const | |
5508 | { | |
5509 | if (size == 32) | |
5510 | { | |
5511 | const Output_data_glink<size, big_endian>* glink = this->glink_section(); | |
5512 | unsigned int glink_index = glink->find_entry(gsym); | |
e5d5f5ed | 5513 | return glink->address() + glink_index * glink->glink_entry_size(); |
cf43a2fe AM |
5514 | } |
5515 | else | |
5516 | gold_unreachable(); | |
42cacb20 DE |
5517 | } |
5518 | ||
bd73a62d AM |
5519 | // Return the offset to use for the GOT_INDX'th got entry which is |
5520 | // for a local tls symbol specified by OBJECT, SYMNDX. | |
5521 | template<int size, bool big_endian> | |
5522 | int64_t | |
5523 | Target_powerpc<size, big_endian>::do_tls_offset_for_local( | |
5524 | const Relobj* object, | |
5525 | unsigned int symndx, | |
5526 | unsigned int got_indx) const | |
5527 | { | |
5528 | const Powerpc_relobj<size, big_endian>* ppc_object | |
5529 | = static_cast<const Powerpc_relobj<size, big_endian>*>(object); | |
5530 | if (ppc_object->local_symbol(symndx)->is_tls_symbol()) | |
5531 | { | |
5532 | for (Got_type got_type = GOT_TYPE_TLSGD; | |
5533 | got_type <= GOT_TYPE_TPREL; | |
5534 | got_type = Got_type(got_type + 1)) | |
5535 | if (ppc_object->local_has_got_offset(symndx, got_type)) | |
5536 | { | |
5537 | unsigned int off = ppc_object->local_got_offset(symndx, got_type); | |
5538 | if (got_type == GOT_TYPE_TLSGD) | |
5539 | off += size / 8; | |
5540 | if (off == got_indx * (size / 8)) | |
5541 | { | |
5542 | if (got_type == GOT_TYPE_TPREL) | |
5543 | return -tp_offset; | |
5544 | else | |
5545 | return -dtp_offset; | |
5546 | } | |
5547 | } | |
5548 | } | |
5549 | gold_unreachable(); | |
5550 | } | |
5551 | ||
5552 | // Return the offset to use for the GOT_INDX'th got entry which is | |
5553 | // for global tls symbol GSYM. | |
5554 | template<int size, bool big_endian> | |
5555 | int64_t | |
5556 | Target_powerpc<size, big_endian>::do_tls_offset_for_global( | |
5557 | Symbol* gsym, | |
5558 | unsigned int got_indx) const | |
5559 | { | |
5560 | if (gsym->type() == elfcpp::STT_TLS) | |
5561 | { | |
5562 | for (Got_type got_type = GOT_TYPE_TLSGD; | |
5563 | got_type <= GOT_TYPE_TPREL; | |
5564 | got_type = Got_type(got_type + 1)) | |
5565 | if (gsym->has_got_offset(got_type)) | |
5566 | { | |
5567 | unsigned int off = gsym->got_offset(got_type); | |
5568 | if (got_type == GOT_TYPE_TLSGD) | |
5569 | off += size / 8; | |
5570 | if (off == got_indx * (size / 8)) | |
5571 | { | |
5572 | if (got_type == GOT_TYPE_TPREL) | |
5573 | return -tp_offset; | |
5574 | else | |
5575 | return -dtp_offset; | |
5576 | } | |
5577 | } | |
5578 | } | |
5579 | gold_unreachable(); | |
5580 | } | |
5581 | ||
42cacb20 DE |
5582 | // The selector for powerpc object files. |
5583 | ||
5584 | template<int size, bool big_endian> | |
5585 | class Target_selector_powerpc : public Target_selector | |
5586 | { | |
5587 | public: | |
5588 | Target_selector_powerpc() | |
5589 | : Target_selector(elfcpp::EM_NONE, size, big_endian, | |
03ef7571 ILT |
5590 | (size == 64 |
5591 | ? (big_endian ? "elf64-powerpc" : "elf64-powerpcle") | |
5592 | : (big_endian ? "elf32-powerpc" : "elf32-powerpcle")), | |
5593 | (size == 64 | |
5594 | ? (big_endian ? "elf64ppc" : "elf64lppc") | |
5595 | : (big_endian ? "elf32ppc" : "elf32lppc"))) | |
42cacb20 DE |
5596 | { } |
5597 | ||
2e702c99 RM |
5598 | virtual Target* |
5599 | do_recognize(Input_file*, off_t, int machine, int, int) | |
42cacb20 DE |
5600 | { |
5601 | switch (size) | |
5602 | { | |
5603 | case 64: | |
2ea97941 | 5604 | if (machine != elfcpp::EM_PPC64) |
42cacb20 DE |
5605 | return NULL; |
5606 | break; | |
5607 | ||
5608 | case 32: | |
2ea97941 | 5609 | if (machine != elfcpp::EM_PPC) |
42cacb20 DE |
5610 | return NULL; |
5611 | break; | |
5612 | ||
5613 | default: | |
5614 | return NULL; | |
5615 | } | |
5616 | ||
7f055c20 | 5617 | return this->instantiate_target(); |
42cacb20 DE |
5618 | } |
5619 | ||
2e702c99 RM |
5620 | virtual Target* |
5621 | do_instantiate_target() | |
7f055c20 | 5622 | { return new Target_powerpc<size, big_endian>(); } |
42cacb20 DE |
5623 | }; |
5624 | ||
5625 | Target_selector_powerpc<32, true> target_selector_ppc32; | |
5626 | Target_selector_powerpc<32, false> target_selector_ppc32le; | |
5627 | Target_selector_powerpc<64, true> target_selector_ppc64; | |
5628 | Target_selector_powerpc<64, false> target_selector_ppc64le; | |
5629 | ||
5630 | } // End anonymous namespace. |