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42cacb20 DE |
1 | // powerpc.cc -- powerpc target support for gold. |
2 | ||
2e702c99 | 3 | // Copyright 2008, 2009, 2010, 2011, 2012 Free Software Foundation, Inc. |
42cacb20 DE |
4 | // Written by David S. Miller <davem@davemloft.net> |
5 | // and David Edelsohn <edelsohn@gnu.org> | |
6 | ||
7 | // This file is part of gold. | |
8 | ||
9 | // This program is free software; you can redistribute it and/or modify | |
10 | // it under the terms of the GNU General Public License as published by | |
11 | // the Free Software Foundation; either version 3 of the License, or | |
12 | // (at your option) any later version. | |
13 | ||
14 | // This program is distributed in the hope that it will be useful, | |
15 | // but WITHOUT ANY WARRANTY; without even the implied warranty of | |
16 | // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
17 | // GNU General Public License for more details. | |
18 | ||
19 | // You should have received a copy of the GNU General Public License | |
20 | // along with this program; if not, write to the Free Software | |
21 | // Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston, | |
22 | // MA 02110-1301, USA. | |
23 | ||
24 | #include "gold.h" | |
25 | ||
26 | #include "elfcpp.h" | |
27 | #include "parameters.h" | |
28 | #include "reloc.h" | |
29 | #include "powerpc.h" | |
30 | #include "object.h" | |
31 | #include "symtab.h" | |
32 | #include "layout.h" | |
33 | #include "output.h" | |
34 | #include "copy-relocs.h" | |
35 | #include "target.h" | |
36 | #include "target-reloc.h" | |
37 | #include "target-select.h" | |
38 | #include "tls.h" | |
39 | #include "errors.h" | |
f345227a | 40 | #include "gc.h" |
42cacb20 DE |
41 | |
42 | namespace | |
43 | { | |
44 | ||
45 | using namespace gold; | |
46 | ||
47 | template<int size, bool big_endian> | |
48 | class Output_data_plt_powerpc; | |
49 | ||
cf43a2fe AM |
50 | template<int size, bool big_endian> |
51 | class Output_data_got_powerpc; | |
52 | ||
53 | template<int size, bool big_endian> | |
54 | class Output_data_glink; | |
55 | ||
56 | template<int size, bool big_endian> | |
57 | class Powerpc_relobj : public Sized_relobj_file<size, big_endian> | |
58 | { | |
59 | public: | |
dd93cd0a | 60 | typedef typename elfcpp::Elf_types<size>::Elf_Addr Address; |
c9269dff | 61 | typedef typename elfcpp::Elf_types<size>::Elf_Off Offset; |
e81fea4d AM |
62 | typedef Unordered_set<Section_id, Section_id_hash> Section_refs; |
63 | typedef Unordered_map<Address, Section_refs> Access_from; | |
c9269dff | 64 | |
cf43a2fe AM |
65 | Powerpc_relobj(const std::string& name, Input_file* input_file, off_t offset, |
66 | const typename elfcpp::Ehdr<size, big_endian>& ehdr) | |
67 | : Sized_relobj_file<size, big_endian>(name, input_file, offset, ehdr), | |
bfdfa4cd | 68 | special_(0), opd_valid_(false), opd_ent_(), access_from_map_() |
cf43a2fe AM |
69 | { } |
70 | ||
71 | ~Powerpc_relobj() | |
72 | { } | |
73 | ||
c9269dff | 74 | // The .got2 section shndx. |
cf43a2fe AM |
75 | unsigned int |
76 | got2_shndx() const | |
77 | { | |
78 | if (size == 32) | |
c9269dff | 79 | return this->special_; |
cf43a2fe AM |
80 | else |
81 | return 0; | |
82 | } | |
83 | ||
c9269dff AM |
84 | // The .opd section shndx. |
85 | unsigned int | |
86 | opd_shndx() const | |
87 | { | |
88 | if (size == 32) | |
89 | return 0; | |
90 | else | |
91 | return this->special_; | |
92 | } | |
93 | ||
94 | // Init OPD entry arrays. | |
95 | void | |
96 | init_opd(size_t opd_size) | |
97 | { | |
98 | size_t count = this->opd_ent_ndx(opd_size); | |
bfdfa4cd | 99 | this->opd_ent_.resize(count); |
c9269dff AM |
100 | } |
101 | ||
102 | // Return section and offset of function entry for .opd + R_OFF. | |
e81fea4d AM |
103 | unsigned int |
104 | get_opd_ent(Address r_off, Address* value = NULL) const | |
c9269dff AM |
105 | { |
106 | size_t ndx = this->opd_ent_ndx(r_off); | |
bfdfa4cd AM |
107 | gold_assert(ndx < this->opd_ent_.size()); |
108 | gold_assert(this->opd_ent_[ndx].shndx != 0); | |
e81fea4d | 109 | if (value != NULL) |
bfdfa4cd AM |
110 | *value = this->opd_ent_[ndx].off; |
111 | return this->opd_ent_[ndx].shndx; | |
c9269dff AM |
112 | } |
113 | ||
114 | // Set section and offset of function entry for .opd + R_OFF. | |
115 | void | |
dd93cd0a | 116 | set_opd_ent(Address r_off, unsigned int shndx, Address value) |
c9269dff AM |
117 | { |
118 | size_t ndx = this->opd_ent_ndx(r_off); | |
bfdfa4cd AM |
119 | gold_assert(ndx < this->opd_ent_.size()); |
120 | this->opd_ent_[ndx].shndx = shndx; | |
121 | this->opd_ent_[ndx].off = value; | |
122 | } | |
123 | ||
124 | // Return discard flag for .opd + R_OFF. | |
125 | bool | |
126 | get_opd_discard(Address r_off) const | |
127 | { | |
128 | size_t ndx = this->opd_ent_ndx(r_off); | |
129 | gold_assert(ndx < this->opd_ent_.size()); | |
130 | return this->opd_ent_[ndx].discard; | |
131 | } | |
132 | ||
133 | // Set discard flag for .opd + R_OFF. | |
134 | void | |
135 | set_opd_discard(Address r_off) | |
136 | { | |
137 | size_t ndx = this->opd_ent_ndx(r_off); | |
138 | gold_assert(ndx < this->opd_ent_.size()); | |
139 | this->opd_ent_[ndx].discard = true; | |
c9269dff AM |
140 | } |
141 | ||
e81fea4d AM |
142 | Access_from* |
143 | access_from_map() | |
144 | { return &this->access_from_map_; } | |
145 | ||
146 | // Add a reference from SRC_OBJ, SRC_INDX to this object's .opd | |
147 | // section at DST_OFF. | |
148 | void | |
149 | add_reference(Object* src_obj, | |
150 | unsigned int src_indx, | |
151 | typename elfcpp::Elf_types<size>::Elf_Addr dst_off) | |
152 | { | |
153 | Section_id src_id(src_obj, src_indx); | |
154 | this->access_from_map_[dst_off].insert(src_id); | |
155 | } | |
156 | ||
157 | bool | |
158 | opd_valid() const | |
159 | { return this->opd_valid_; } | |
160 | ||
161 | void | |
162 | set_opd_valid() | |
163 | { this->opd_valid_ = true; } | |
164 | ||
c9269dff AM |
165 | // Examine .rela.opd to build info about function entry points. |
166 | void | |
167 | scan_opd_relocs(size_t reloc_count, | |
168 | const unsigned char* prelocs, | |
169 | const unsigned char* plocal_syms); | |
170 | ||
171 | void | |
172 | do_read_relocs(Read_relocs_data*); | |
173 | ||
cf43a2fe AM |
174 | bool |
175 | do_find_special_sections(Read_symbols_data* sd); | |
176 | ||
dd93cd0a AM |
177 | // Return offset in output GOT section that this object will use |
178 | // as a TOC pointer. Won't be just a constant with multi-toc support. | |
179 | Address | |
180 | toc_base_offset() const | |
181 | { return 0x8000; } | |
182 | ||
cf43a2fe | 183 | private: |
bfdfa4cd AM |
184 | struct Opd_ent |
185 | { | |
186 | unsigned int shndx; | |
187 | bool discard; | |
188 | Offset off; | |
189 | }; | |
190 | ||
191 | // Return index into opd_ent_ array for .opd entry at OFF. | |
192 | // .opd entries are 24 bytes long, but they can be spaced 16 bytes | |
193 | // apart when the language doesn't use the last 8-byte word, the | |
194 | // environment pointer. Thus dividing the entry section offset by | |
195 | // 16 will give an index into opd_ent_ that works for either layout | |
196 | // of .opd. (It leaves some elements of the vector unused when .opd | |
197 | // entries are spaced 24 bytes apart, but we don't know the spacing | |
198 | // until relocations are processed, and in any case it is possible | |
199 | // for an object to have some entries spaced 16 bytes apart and | |
200 | // others 24 bytes apart.) | |
c9269dff AM |
201 | size_t |
202 | opd_ent_ndx(size_t off) const | |
203 | { return off >> 4;} | |
204 | ||
205 | // For 32-bit the .got2 section shdnx, for 64-bit the .opd section shndx. | |
206 | unsigned int special_; | |
bfdfa4cd AM |
207 | |
208 | // Set at the start of gc_process_relocs, when we know opd_ent_ | |
209 | // vector is valid. The flag could be made atomic and set in | |
210 | // do_read_relocs with memory_order_release and then tested with | |
211 | // memory_order_acquire, potentially resulting in fewer entries in | |
212 | // access_from_map_. | |
213 | bool opd_valid_; | |
214 | ||
c9269dff AM |
215 | // The first 8-byte word of an OPD entry gives the address of the |
216 | // entry point of the function. Relocatable object files have a | |
bfdfa4cd | 217 | // relocation on this word. The following vector records the |
c9269dff | 218 | // section and offset specified by these relocations. |
bfdfa4cd AM |
219 | std::vector<Opd_ent> opd_ent_; |
220 | ||
e81fea4d | 221 | // References made to this object's .opd section when running |
bfdfa4cd AM |
222 | // gc_process_relocs for another object, before the opd_ent_ vector |
223 | // is valid for this object. | |
e81fea4d | 224 | Access_from access_from_map_; |
cf43a2fe AM |
225 | }; |
226 | ||
42cacb20 DE |
227 | template<int size, bool big_endian> |
228 | class Target_powerpc : public Sized_target<size, big_endian> | |
229 | { | |
230 | public: | |
d83ce4e3 AM |
231 | typedef |
232 | Output_data_reloc<elfcpp::SHT_RELA, true, size, big_endian> Reloc_section; | |
c9269dff | 233 | typedef typename elfcpp::Elf_types<size>::Elf_Addr Address; |
dd93cd0a | 234 | typedef typename elfcpp::Elf_types<size>::Elf_Swxword Signed_address; |
c9269dff | 235 | static const Address invalid_address = static_cast<Address>(0) - 1; |
dd93cd0a AM |
236 | // Offset of tp and dtp pointers from start of TLS block. |
237 | static const Address tp_offset = 0x7000; | |
238 | static const Address dtp_offset = 0x8000; | |
42cacb20 DE |
239 | |
240 | Target_powerpc() | |
241 | : Sized_target<size, big_endian>(&powerpc_info), | |
cf43a2fe | 242 | got_(NULL), plt_(NULL), glink_(NULL), rela_dyn_(NULL), |
42cacb20 | 243 | copy_relocs_(elfcpp::R_POWERPC_COPY), |
dd93cd0a | 244 | dynbss_(NULL), tlsld_got_offset_(-1U) |
42cacb20 DE |
245 | { |
246 | } | |
247 | ||
2e702c99 | 248 | // Process the relocations to determine unreferenced sections for |
6d03d481 ST |
249 | // garbage collection. |
250 | void | |
ad0f2072 | 251 | gc_process_relocs(Symbol_table* symtab, |
2e702c99 RM |
252 | Layout* layout, |
253 | Sized_relobj_file<size, big_endian>* object, | |
254 | unsigned int data_shndx, | |
255 | unsigned int sh_type, | |
256 | const unsigned char* prelocs, | |
257 | size_t reloc_count, | |
258 | Output_section* output_section, | |
259 | bool needs_special_offset_handling, | |
260 | size_t local_symbol_count, | |
261 | const unsigned char* plocal_symbols); | |
6d03d481 | 262 | |
42cacb20 DE |
263 | // Scan the relocations to look for symbol adjustments. |
264 | void | |
ad0f2072 | 265 | scan_relocs(Symbol_table* symtab, |
42cacb20 | 266 | Layout* layout, |
6fa2a40b | 267 | Sized_relobj_file<size, big_endian>* object, |
42cacb20 DE |
268 | unsigned int data_shndx, |
269 | unsigned int sh_type, | |
270 | const unsigned char* prelocs, | |
271 | size_t reloc_count, | |
272 | Output_section* output_section, | |
273 | bool needs_special_offset_handling, | |
274 | size_t local_symbol_count, | |
275 | const unsigned char* plocal_symbols); | |
921b5322 AM |
276 | |
277 | // Map input .toc section to output .got section. | |
278 | const char* | |
279 | do_output_section_name(const Relobj*, const char* name, size_t* plen) const | |
280 | { | |
281 | if (size == 64 && strcmp(name, ".toc") == 0) | |
282 | { | |
283 | *plen = 4; | |
284 | return ".got"; | |
285 | } | |
286 | return NULL; | |
287 | } | |
288 | ||
42cacb20 DE |
289 | // Finalize the sections. |
290 | void | |
f59f41f3 | 291 | do_finalize_sections(Layout*, const Input_objects*, Symbol_table*); |
42cacb20 DE |
292 | |
293 | // Return the value to use for a dynamic which requires special | |
294 | // treatment. | |
295 | uint64_t | |
296 | do_dynsym_value(const Symbol*) const; | |
297 | ||
bd73a62d AM |
298 | // Return the offset to use for the GOT_INDX'th got entry which is |
299 | // for a local tls symbol specified by OBJECT, SYMNDX. | |
300 | int64_t | |
301 | do_tls_offset_for_local(const Relobj* object, | |
302 | unsigned int symndx, | |
303 | unsigned int got_indx) const; | |
304 | ||
305 | // Return the offset to use for the GOT_INDX'th got entry which is | |
306 | // for global tls symbol GSYM. | |
307 | int64_t | |
308 | do_tls_offset_for_global(Symbol* gsym, unsigned int got_indx) const; | |
309 | ||
42cacb20 DE |
310 | // Relocate a section. |
311 | void | |
312 | relocate_section(const Relocate_info<size, big_endian>*, | |
313 | unsigned int sh_type, | |
314 | const unsigned char* prelocs, | |
315 | size_t reloc_count, | |
316 | Output_section* output_section, | |
317 | bool needs_special_offset_handling, | |
318 | unsigned char* view, | |
c9269dff | 319 | Address view_address, |
364c7fa5 ILT |
320 | section_size_type view_size, |
321 | const Reloc_symbol_changes*); | |
42cacb20 DE |
322 | |
323 | // Scan the relocs during a relocatable link. | |
324 | void | |
ad0f2072 | 325 | scan_relocatable_relocs(Symbol_table* symtab, |
42cacb20 | 326 | Layout* layout, |
6fa2a40b | 327 | Sized_relobj_file<size, big_endian>* object, |
42cacb20 DE |
328 | unsigned int data_shndx, |
329 | unsigned int sh_type, | |
330 | const unsigned char* prelocs, | |
331 | size_t reloc_count, | |
332 | Output_section* output_section, | |
333 | bool needs_special_offset_handling, | |
334 | size_t local_symbol_count, | |
335 | const unsigned char* plocal_symbols, | |
336 | Relocatable_relocs*); | |
337 | ||
7404fe1b | 338 | // Emit relocations for a section. |
42cacb20 | 339 | void |
7404fe1b AM |
340 | relocate_relocs(const Relocate_info<size, big_endian>*, |
341 | unsigned int sh_type, | |
342 | const unsigned char* prelocs, | |
343 | size_t reloc_count, | |
344 | Output_section* output_section, | |
345 | off_t offset_in_output_section, | |
346 | const Relocatable_relocs*, | |
347 | unsigned char*, | |
348 | Address view_address, | |
349 | section_size_type, | |
350 | unsigned char* reloc_view, | |
351 | section_size_type reloc_view_size); | |
42cacb20 DE |
352 | |
353 | // Return whether SYM is defined by the ABI. | |
354 | bool | |
9c2d0ef9 | 355 | do_is_defined_by_abi(const Symbol* sym) const |
42cacb20 | 356 | { |
cf43a2fe | 357 | return strcmp(sym->name(), "__tls_get_addr") == 0; |
42cacb20 DE |
358 | } |
359 | ||
360 | // Return the size of the GOT section. | |
361 | section_size_type | |
0e70b911 | 362 | got_size() const |
42cacb20 DE |
363 | { |
364 | gold_assert(this->got_ != NULL); | |
365 | return this->got_->data_size(); | |
366 | } | |
367 | ||
cf43a2fe AM |
368 | // Get the PLT section. |
369 | const Output_data_plt_powerpc<size, big_endian>* | |
370 | plt_section() const | |
371 | { | |
372 | gold_assert(this->plt_ != NULL); | |
373 | return this->plt_; | |
374 | } | |
375 | ||
376 | // Get the .glink section. | |
377 | const Output_data_glink<size, big_endian>* | |
378 | glink_section() const | |
379 | { | |
380 | gold_assert(this->glink_ != NULL); | |
381 | return this->glink_; | |
382 | } | |
383 | ||
384 | // Get the GOT section. | |
385 | const Output_data_got_powerpc<size, big_endian>* | |
386 | got_section() const | |
387 | { | |
388 | gold_assert(this->got_ != NULL); | |
389 | return this->got_; | |
390 | } | |
391 | ||
cf43a2fe AM |
392 | Object* |
393 | do_make_elf_object(const std::string&, Input_file*, off_t, | |
394 | const elfcpp::Ehdr<size, big_endian>&); | |
395 | ||
0e70b911 CC |
396 | // Return the number of entries in the GOT. |
397 | unsigned int | |
398 | got_entry_count() const | |
399 | { | |
400 | if (this->got_ == NULL) | |
401 | return 0; | |
402 | return this->got_size() / (size / 8); | |
403 | } | |
404 | ||
405 | // Return the number of entries in the PLT. | |
406 | unsigned int | |
407 | plt_entry_count() const; | |
408 | ||
409 | // Return the offset of the first non-reserved PLT entry. | |
410 | unsigned int | |
411 | first_plt_entry_offset() const; | |
412 | ||
413 | // Return the size of each PLT entry. | |
414 | unsigned int | |
415 | plt_entry_size() const; | |
416 | ||
e81fea4d AM |
417 | // Add any special sections for this symbol to the gc work list. |
418 | // For powerpc64, this adds the code section of a function | |
419 | // descriptor. | |
420 | void | |
421 | do_gc_mark_symbol(Symbol_table* symtab, Symbol* sym) const; | |
422 | ||
423 | // Handle target specific gc actions when adding a gc reference from | |
424 | // SRC_OBJ, SRC_SHNDX to a location specified by DST_OBJ, DST_SHNDX | |
425 | // and DST_OFF. For powerpc64, this adds a referenc to the code | |
426 | // section of a function descriptor. | |
427 | void | |
428 | do_gc_add_reference(Symbol_table* symtab, | |
429 | Object* src_obj, | |
430 | unsigned int src_shndx, | |
431 | Object* dst_obj, | |
432 | unsigned int dst_shndx, | |
433 | Address dst_off) const; | |
434 | ||
42cacb20 DE |
435 | private: |
436 | ||
437 | // The class which scans relocations. | |
438 | class Scan | |
439 | { | |
440 | public: | |
bfdfa4cd AM |
441 | typedef typename elfcpp::Elf_types<size>::Elf_Addr Address; |
442 | ||
42cacb20 DE |
443 | Scan() |
444 | : issued_non_pic_error_(false) | |
445 | { } | |
446 | ||
95a2c8d6 RS |
447 | static inline int |
448 | get_reference_flags(unsigned int r_type); | |
449 | ||
42cacb20 | 450 | inline void |
ad0f2072 | 451 | local(Symbol_table* symtab, Layout* layout, Target_powerpc* target, |
6fa2a40b | 452 | Sized_relobj_file<size, big_endian>* object, |
42cacb20 DE |
453 | unsigned int data_shndx, |
454 | Output_section* output_section, | |
455 | const elfcpp::Rela<size, big_endian>& reloc, unsigned int r_type, | |
bfdfa4cd AM |
456 | const elfcpp::Sym<size, big_endian>& lsym, |
457 | bool is_discarded); | |
42cacb20 DE |
458 | |
459 | inline void | |
ad0f2072 | 460 | global(Symbol_table* symtab, Layout* layout, Target_powerpc* target, |
6fa2a40b | 461 | Sized_relobj_file<size, big_endian>* object, |
42cacb20 DE |
462 | unsigned int data_shndx, |
463 | Output_section* output_section, | |
464 | const elfcpp::Rela<size, big_endian>& reloc, unsigned int r_type, | |
465 | Symbol* gsym); | |
466 | ||
21bb3914 ST |
467 | inline bool |
468 | local_reloc_may_be_function_pointer(Symbol_table* , Layout* , | |
469 | Target_powerpc* , | |
2e702c99 | 470 | Sized_relobj_file<size, big_endian>* , |
21bb3914 | 471 | unsigned int , |
2e702c99 RM |
472 | Output_section* , |
473 | const elfcpp::Rela<size, big_endian>& , | |
474 | unsigned int , | |
475 | const elfcpp::Sym<size, big_endian>&) | |
21bb3914 ST |
476 | { return false; } |
477 | ||
478 | inline bool | |
479 | global_reloc_may_be_function_pointer(Symbol_table* , Layout* , | |
480 | Target_powerpc* , | |
2e702c99 RM |
481 | Sized_relobj_file<size, big_endian>* , |
482 | unsigned int , | |
483 | Output_section* , | |
484 | const elfcpp::Rela<size, | |
21bb3914 ST |
485 | big_endian>& , |
486 | unsigned int , Symbol*) | |
487 | { return false; } | |
488 | ||
42cacb20 DE |
489 | private: |
490 | static void | |
6fa2a40b | 491 | unsupported_reloc_local(Sized_relobj_file<size, big_endian>*, |
42cacb20 DE |
492 | unsigned int r_type); |
493 | ||
494 | static void | |
6fa2a40b | 495 | unsupported_reloc_global(Sized_relobj_file<size, big_endian>*, |
42cacb20 DE |
496 | unsigned int r_type, Symbol*); |
497 | ||
498 | static void | |
499 | generate_tls_call(Symbol_table* symtab, Layout* layout, | |
500 | Target_powerpc* target); | |
501 | ||
502 | void | |
503 | check_non_pic(Relobj*, unsigned int r_type); | |
504 | ||
505 | // Whether we have issued an error about a non-PIC compilation. | |
506 | bool issued_non_pic_error_; | |
507 | }; | |
508 | ||
3ea0a085 AM |
509 | Address |
510 | symval_for_branch(Address value, const Sized_symbol<size>* gsym, | |
511 | Powerpc_relobj<size, big_endian>* object, | |
512 | unsigned int *dest_shndx); | |
513 | ||
42cacb20 DE |
514 | // The class which implements relocation. |
515 | class Relocate | |
516 | { | |
517 | public: | |
dd93cd0a AM |
518 | // Use 'at' branch hints when true, 'y' when false. |
519 | // FIXME maybe: set this with an option. | |
520 | static const bool is_isa_v2 = true; | |
521 | ||
522 | enum skip_tls | |
523 | { | |
524 | CALL_NOT_EXPECTED = 0, | |
525 | CALL_EXPECTED = 1, | |
526 | CALL_SKIP = 2 | |
527 | }; | |
528 | ||
529 | Relocate() | |
530 | : call_tls_get_addr_(CALL_NOT_EXPECTED) | |
531 | { } | |
532 | ||
533 | ~Relocate() | |
534 | { | |
535 | if (this->call_tls_get_addr_ != CALL_NOT_EXPECTED) | |
536 | { | |
537 | // FIXME: This needs to specify the location somehow. | |
538 | gold_error(_("missing expected __tls_get_addr call")); | |
539 | } | |
540 | } | |
541 | ||
42cacb20 DE |
542 | // Do a relocation. Return false if the caller should not issue |
543 | // any warnings about this relocation. | |
544 | inline bool | |
545 | relocate(const Relocate_info<size, big_endian>*, Target_powerpc*, | |
031cdbed ILT |
546 | Output_section*, size_t relnum, |
547 | const elfcpp::Rela<size, big_endian>&, | |
42cacb20 DE |
548 | unsigned int r_type, const Sized_symbol<size>*, |
549 | const Symbol_value<size>*, | |
550 | unsigned char*, | |
551 | typename elfcpp::Elf_types<size>::Elf_Addr, | |
552 | section_size_type); | |
553 | ||
dd93cd0a AM |
554 | // This is set if we should skip the next reloc, which should be a |
555 | // call to __tls_get_addr. | |
556 | enum skip_tls call_tls_get_addr_; | |
42cacb20 DE |
557 | }; |
558 | ||
559 | // A class which returns the size required for a relocation type, | |
560 | // used while scanning relocs during a relocatable link. | |
561 | class Relocatable_size_for_reloc | |
562 | { | |
563 | public: | |
564 | unsigned int | |
cf43a2fe AM |
565 | get_size_for_reloc(unsigned int, Relobj*) |
566 | { | |
567 | gold_unreachable(); | |
568 | return 0; | |
569 | } | |
42cacb20 DE |
570 | }; |
571 | ||
dd93cd0a AM |
572 | // Optimize the TLS relocation type based on what we know about the |
573 | // symbol. IS_FINAL is true if the final address of this symbol is | |
574 | // known at link time. | |
575 | ||
576 | tls::Tls_optimization | |
577 | optimize_tls_gd(bool is_final) | |
578 | { | |
579 | // If we are generating a shared library, then we can't do anything | |
580 | // in the linker. | |
581 | if (parameters->options().shared()) | |
582 | return tls::TLSOPT_NONE; | |
583 | ||
584 | if (!is_final) | |
585 | return tls::TLSOPT_TO_IE; | |
586 | return tls::TLSOPT_TO_LE; | |
587 | } | |
588 | ||
589 | tls::Tls_optimization | |
590 | optimize_tls_ld() | |
591 | { | |
592 | if (parameters->options().shared()) | |
593 | return tls::TLSOPT_NONE; | |
594 | ||
595 | return tls::TLSOPT_TO_LE; | |
596 | } | |
597 | ||
598 | tls::Tls_optimization | |
599 | optimize_tls_ie(bool is_final) | |
600 | { | |
601 | if (!is_final || parameters->options().shared()) | |
602 | return tls::TLSOPT_NONE; | |
603 | ||
604 | return tls::TLSOPT_TO_LE; | |
605 | } | |
cf43a2fe | 606 | |
42cacb20 | 607 | // Get the GOT section, creating it if necessary. |
cf43a2fe | 608 | Output_data_got_powerpc<size, big_endian>* |
42cacb20 DE |
609 | got_section(Symbol_table*, Layout*); |
610 | ||
cf43a2fe AM |
611 | // Create glink. |
612 | void | |
613 | make_glink_section(Layout*); | |
42cacb20 | 614 | |
cf43a2fe AM |
615 | // Create the PLT section. |
616 | void | |
617 | make_plt_section(Layout*); | |
42cacb20 DE |
618 | |
619 | // Create a PLT entry for a global symbol. | |
620 | void | |
cf43a2fe AM |
621 | make_plt_entry(Layout*, Symbol*, |
622 | const elfcpp::Rela<size, big_endian>&, | |
623 | const Sized_relobj<size, big_endian>* object); | |
42cacb20 | 624 | |
dd93cd0a AM |
625 | // Create a GOT entry for local dynamic __tls_get_addr. |
626 | unsigned int | |
627 | tlsld_got_offset(Symbol_table* symtab, Layout* layout, | |
628 | Sized_relobj_file<size, big_endian>* object); | |
629 | ||
42cacb20 | 630 | unsigned int |
dd93cd0a AM |
631 | tlsld_got_offset() const |
632 | { | |
633 | return this->tlsld_got_offset_; | |
634 | } | |
42cacb20 | 635 | |
42cacb20 DE |
636 | // Get the dynamic reloc section, creating it if necessary. |
637 | Reloc_section* | |
638 | rela_dyn_section(Layout*); | |
639 | ||
42cacb20 DE |
640 | // Copy a relocation against a global symbol. |
641 | void | |
ef9beddf | 642 | copy_reloc(Symbol_table* symtab, Layout* layout, |
2e702c99 | 643 | Sized_relobj_file<size, big_endian>* object, |
42cacb20 DE |
644 | unsigned int shndx, Output_section* output_section, |
645 | Symbol* sym, const elfcpp::Rela<size, big_endian>& reloc) | |
646 | { | |
647 | this->copy_relocs_.copy_reloc(symtab, layout, | |
648 | symtab->get_sized_symbol<size>(sym), | |
649 | object, shndx, output_section, | |
650 | reloc, this->rela_dyn_section(layout)); | |
651 | } | |
652 | ||
653 | // Information about this specific target which we pass to the | |
654 | // general Target structure. | |
655 | static Target::Target_info powerpc_info; | |
656 | ||
657 | // The types of GOT entries needed for this platform. | |
0e70b911 CC |
658 | // These values are exposed to the ABI in an incremental link. |
659 | // Do not renumber existing values without changing the version | |
660 | // number of the .gnu_incremental_inputs section. | |
42cacb20 DE |
661 | enum Got_type |
662 | { | |
dd93cd0a AM |
663 | GOT_TYPE_STANDARD, |
664 | GOT_TYPE_TLSGD, // double entry for @got@tlsgd | |
665 | GOT_TYPE_DTPREL, // entry for @got@dtprel | |
666 | GOT_TYPE_TPREL // entry for @got@tprel | |
42cacb20 DE |
667 | }; |
668 | ||
cf43a2fe AM |
669 | // The GOT output section. |
670 | Output_data_got_powerpc<size, big_endian>* got_; | |
671 | // The PLT output section. | |
42cacb20 | 672 | Output_data_plt_powerpc<size, big_endian>* plt_; |
cf43a2fe AM |
673 | // The .glink output section. |
674 | Output_data_glink<size, big_endian>* glink_; | |
675 | // The dynamic reloc output section. | |
42cacb20 DE |
676 | Reloc_section* rela_dyn_; |
677 | // Relocs saved to avoid a COPY reloc. | |
678 | Copy_relocs<elfcpp::SHT_RELA, size, big_endian> copy_relocs_; | |
679 | // Space for variables copied with a COPY reloc. | |
680 | Output_data_space* dynbss_; | |
dd93cd0a AM |
681 | // Offset of the GOT entry for local dynamic __tls_get_addr calls. |
682 | unsigned int tlsld_got_offset_; | |
42cacb20 DE |
683 | }; |
684 | ||
685 | template<> | |
686 | Target::Target_info Target_powerpc<32, true>::powerpc_info = | |
687 | { | |
688 | 32, // size | |
689 | true, // is_big_endian | |
690 | elfcpp::EM_PPC, // machine_code | |
691 | false, // has_make_symbol | |
692 | false, // has_resolve | |
693 | false, // has_code_fill | |
694 | true, // is_default_stack_executable | |
b3ce541e | 695 | false, // can_icf_inline_merge_sections |
42cacb20 DE |
696 | '\0', // wrap_char |
697 | "/usr/lib/ld.so.1", // dynamic_linker | |
698 | 0x10000000, // default_text_segment_address | |
699 | 64 * 1024, // abi_pagesize (overridable by -z max-page-size) | |
8a5e3e08 | 700 | 4 * 1024, // common_pagesize (overridable by -z common-page-size) |
c9269dff AM |
701 | false, // isolate_execinstr |
702 | 0, // rosegment_gap | |
8a5e3e08 ILT |
703 | elfcpp::SHN_UNDEF, // small_common_shndx |
704 | elfcpp::SHN_UNDEF, // large_common_shndx | |
705 | 0, // small_common_section_flags | |
05a352e6 DK |
706 | 0, // large_common_section_flags |
707 | NULL, // attributes_section | |
708 | NULL // attributes_vendor | |
42cacb20 DE |
709 | }; |
710 | ||
711 | template<> | |
712 | Target::Target_info Target_powerpc<32, false>::powerpc_info = | |
713 | { | |
714 | 32, // size | |
715 | false, // is_big_endian | |
716 | elfcpp::EM_PPC, // machine_code | |
717 | false, // has_make_symbol | |
718 | false, // has_resolve | |
719 | false, // has_code_fill | |
720 | true, // is_default_stack_executable | |
b3ce541e | 721 | false, // can_icf_inline_merge_sections |
42cacb20 DE |
722 | '\0', // wrap_char |
723 | "/usr/lib/ld.so.1", // dynamic_linker | |
724 | 0x10000000, // default_text_segment_address | |
725 | 64 * 1024, // abi_pagesize (overridable by -z max-page-size) | |
8a5e3e08 | 726 | 4 * 1024, // common_pagesize (overridable by -z common-page-size) |
c9269dff AM |
727 | false, // isolate_execinstr |
728 | 0, // rosegment_gap | |
8a5e3e08 ILT |
729 | elfcpp::SHN_UNDEF, // small_common_shndx |
730 | elfcpp::SHN_UNDEF, // large_common_shndx | |
731 | 0, // small_common_section_flags | |
05a352e6 DK |
732 | 0, // large_common_section_flags |
733 | NULL, // attributes_section | |
734 | NULL // attributes_vendor | |
42cacb20 DE |
735 | }; |
736 | ||
737 | template<> | |
738 | Target::Target_info Target_powerpc<64, true>::powerpc_info = | |
739 | { | |
740 | 64, // size | |
741 | true, // is_big_endian | |
742 | elfcpp::EM_PPC64, // machine_code | |
743 | false, // has_make_symbol | |
744 | false, // has_resolve | |
745 | false, // has_code_fill | |
746 | true, // is_default_stack_executable | |
b3ce541e | 747 | false, // can_icf_inline_merge_sections |
42cacb20 DE |
748 | '\0', // wrap_char |
749 | "/usr/lib/ld.so.1", // dynamic_linker | |
750 | 0x10000000, // default_text_segment_address | |
751 | 64 * 1024, // abi_pagesize (overridable by -z max-page-size) | |
dd93cd0a | 752 | 4 * 1024, // common_pagesize (overridable by -z common-page-size) |
c9269dff AM |
753 | false, // isolate_execinstr |
754 | 0, // rosegment_gap | |
8a5e3e08 ILT |
755 | elfcpp::SHN_UNDEF, // small_common_shndx |
756 | elfcpp::SHN_UNDEF, // large_common_shndx | |
757 | 0, // small_common_section_flags | |
05a352e6 DK |
758 | 0, // large_common_section_flags |
759 | NULL, // attributes_section | |
760 | NULL // attributes_vendor | |
42cacb20 DE |
761 | }; |
762 | ||
763 | template<> | |
764 | Target::Target_info Target_powerpc<64, false>::powerpc_info = | |
765 | { | |
766 | 64, // size | |
767 | false, // is_big_endian | |
768 | elfcpp::EM_PPC64, // machine_code | |
769 | false, // has_make_symbol | |
770 | false, // has_resolve | |
771 | false, // has_code_fill | |
772 | true, // is_default_stack_executable | |
b3ce541e | 773 | false, // can_icf_inline_merge_sections |
42cacb20 DE |
774 | '\0', // wrap_char |
775 | "/usr/lib/ld.so.1", // dynamic_linker | |
776 | 0x10000000, // default_text_segment_address | |
777 | 64 * 1024, // abi_pagesize (overridable by -z max-page-size) | |
dd93cd0a | 778 | 4 * 1024, // common_pagesize (overridable by -z common-page-size) |
c9269dff AM |
779 | false, // isolate_execinstr |
780 | 0, // rosegment_gap | |
8a5e3e08 ILT |
781 | elfcpp::SHN_UNDEF, // small_common_shndx |
782 | elfcpp::SHN_UNDEF, // large_common_shndx | |
783 | 0, // small_common_section_flags | |
05a352e6 DK |
784 | 0, // large_common_section_flags |
785 | NULL, // attributes_section | |
786 | NULL // attributes_vendor | |
42cacb20 DE |
787 | }; |
788 | ||
dd93cd0a AM |
789 | inline bool |
790 | is_branch_reloc(unsigned int r_type) | |
791 | { | |
792 | return (r_type == elfcpp::R_POWERPC_REL24 | |
793 | || r_type == elfcpp::R_PPC_PLTREL24 | |
794 | || r_type == elfcpp::R_PPC_LOCAL24PC | |
795 | || r_type == elfcpp::R_POWERPC_REL14 | |
796 | || r_type == elfcpp::R_POWERPC_REL14_BRTAKEN | |
797 | || r_type == elfcpp::R_POWERPC_REL14_BRNTAKEN | |
798 | || r_type == elfcpp::R_POWERPC_ADDR24 | |
799 | || r_type == elfcpp::R_POWERPC_ADDR14 | |
800 | || r_type == elfcpp::R_POWERPC_ADDR14_BRTAKEN | |
801 | || r_type == elfcpp::R_POWERPC_ADDR14_BRNTAKEN); | |
802 | } | |
803 | ||
804 | // If INSN is an opcode that may be used with an @tls operand, return | |
805 | // the transformed insn for TLS optimisation, otherwise return 0. If | |
806 | // REG is non-zero only match an insn with RB or RA equal to REG. | |
807 | uint32_t | |
808 | at_tls_transform(uint32_t insn, unsigned int reg) | |
809 | { | |
810 | if ((insn & (0x3f << 26)) != 31 << 26) | |
811 | return 0; | |
812 | ||
813 | unsigned int rtra; | |
814 | if (reg == 0 || ((insn >> 11) & 0x1f) == reg) | |
815 | rtra = insn & ((1 << 26) - (1 << 16)); | |
816 | else if (((insn >> 16) & 0x1f) == reg) | |
817 | rtra = (insn & (0x1f << 21)) | ((insn & (0x1f << 11)) << 5); | |
818 | else | |
819 | return 0; | |
820 | ||
821 | if ((insn & (0x3ff << 1)) == 266 << 1) | |
822 | // add -> addi | |
823 | insn = 14 << 26; | |
824 | else if ((insn & (0x1f << 1)) == 23 << 1 | |
825 | && ((insn & (0x1f << 6)) < 14 << 6 | |
826 | || ((insn & (0x1f << 6)) >= 16 << 6 | |
827 | && (insn & (0x1f << 6)) < 24 << 6))) | |
828 | // load and store indexed -> dform | |
829 | insn = (32 | ((insn >> 6) & 0x1f)) << 26; | |
830 | else if ((insn & (((0x1a << 5) | 0x1f) << 1)) == 21 << 1) | |
831 | // ldx, ldux, stdx, stdux -> ld, ldu, std, stdu | |
832 | insn = ((58 | ((insn >> 6) & 4)) << 26) | ((insn >> 6) & 1); | |
833 | else if ((insn & (((0x1f << 5) | 0x1f) << 1)) == 341 << 1) | |
834 | // lwax -> lwa | |
835 | insn = (58 << 26) | 2; | |
836 | else | |
837 | return 0; | |
838 | insn |= rtra; | |
839 | return insn; | |
840 | } | |
841 | ||
842 | // Modified version of symtab.h class Symbol member | |
843 | // Given a direct absolute or pc-relative static relocation against | |
844 | // the global symbol, this function returns whether a dynamic relocation | |
845 | // is needed. | |
846 | ||
847 | template<int size> | |
848 | bool | |
849 | needs_dynamic_reloc(const Symbol* gsym, int flags) | |
850 | { | |
851 | // No dynamic relocations in a static link! | |
852 | if (parameters->doing_static_link()) | |
853 | return false; | |
854 | ||
855 | // A reference to an undefined symbol from an executable should be | |
856 | // statically resolved to 0, and does not need a dynamic relocation. | |
857 | // This matches gnu ld behavior. | |
858 | if (gsym->is_undefined() && !parameters->options().shared()) | |
859 | return false; | |
860 | ||
861 | // A reference to an absolute symbol does not need a dynamic relocation. | |
862 | if (gsym->is_absolute()) | |
863 | return false; | |
864 | ||
865 | // An absolute reference within a position-independent output file | |
866 | // will need a dynamic relocation. | |
867 | if ((flags & Symbol::ABSOLUTE_REF) | |
868 | && parameters->options().output_is_position_independent()) | |
869 | return true; | |
870 | ||
871 | // A function call that can branch to a local PLT entry does not need | |
872 | // a dynamic relocation. | |
873 | if ((flags & Symbol::FUNCTION_CALL) && gsym->has_plt_offset()) | |
874 | return false; | |
875 | ||
876 | // A reference to any PLT entry in a non-position-independent executable | |
877 | // does not need a dynamic relocation. | |
878 | // Except due to having function descriptors on powerpc64 we don't define | |
879 | // functions to their plt code in an executable, so this doesn't apply. | |
880 | if (size == 32 | |
881 | && !parameters->options().output_is_position_independent() | |
882 | && gsym->has_plt_offset()) | |
883 | return false; | |
884 | ||
885 | // A reference to a symbol defined in a dynamic object or to a | |
886 | // symbol that is preemptible will need a dynamic relocation. | |
887 | if (gsym->is_from_dynobj() | |
888 | || gsym->is_undefined() | |
889 | || gsym->is_preemptible()) | |
890 | return true; | |
891 | ||
892 | // For all other cases, return FALSE. | |
893 | return false; | |
894 | } | |
895 | ||
896 | // Modified version of symtab.h class Symbol member | |
897 | // Whether we should use the PLT offset associated with a symbol for | |
898 | // a relocation. FLAGS is a set of Reference_flags. | |
899 | ||
900 | template<int size> | |
901 | bool | |
902 | use_plt_offset(const Symbol* gsym, int flags) | |
903 | { | |
904 | // If the symbol doesn't have a PLT offset, then naturally we | |
905 | // don't want to use it. | |
906 | if (!gsym->has_plt_offset()) | |
907 | return false; | |
908 | ||
909 | // For a STT_GNU_IFUNC symbol we always have to use the PLT entry. | |
910 | if (gsym->type() == elfcpp::STT_GNU_IFUNC) | |
911 | return true; | |
912 | ||
913 | // If we are going to generate a dynamic relocation, then we will | |
914 | // wind up using that, so no need to use the PLT entry. | |
915 | if (needs_dynamic_reloc<size>(gsym, flags)) | |
916 | return false; | |
917 | ||
918 | // If the symbol is from a dynamic object, we need to use the PLT | |
919 | // entry. | |
920 | if (gsym->is_from_dynobj()) | |
921 | return true; | |
922 | ||
923 | // If we are generating a shared object, and gsym symbol is | |
924 | // undefined or preemptible, we need to use the PLT entry. | |
925 | if (parameters->options().shared() | |
926 | && (gsym->is_undefined() || gsym->is_preemptible())) | |
927 | return true; | |
928 | ||
929 | // If gsym is a call to a weak undefined symbol, we need to use | |
930 | // the PLT entry; the symbol may be defined by a library loaded | |
931 | // at runtime. | |
932 | if ((flags & Symbol::FUNCTION_CALL) && gsym->is_weak_undefined()) | |
933 | return true; | |
934 | ||
935 | // Otherwise we can use the regular definition. | |
936 | return false; | |
937 | } | |
938 | ||
42cacb20 DE |
939 | template<int size, bool big_endian> |
940 | class Powerpc_relocate_functions | |
941 | { | |
dd93cd0a | 942 | public: |
f4baf0d4 | 943 | enum Overflow_check |
dd93cd0a | 944 | { |
f4baf0d4 AM |
945 | CHECK_NONE, |
946 | CHECK_SIGNED, | |
947 | CHECK_BITFIELD | |
dd93cd0a AM |
948 | }; |
949 | ||
f4baf0d4 | 950 | enum Status |
dd93cd0a | 951 | { |
f4baf0d4 AM |
952 | STATUS_OK, |
953 | STATUS_OVERFLOW | |
954 | }; | |
dd93cd0a | 955 | |
42cacb20 | 956 | private: |
c9269dff | 957 | typedef Powerpc_relocate_functions<size, big_endian> This; |
c9269dff AM |
958 | typedef typename elfcpp::Elf_types<size>::Elf_Addr Address; |
959 | ||
dd93cd0a AM |
960 | template<int valsize> |
961 | static inline bool | |
962 | has_overflow_signed(Address value) | |
963 | { | |
964 | // limit = 1 << (valsize - 1) without shift count exceeding size of type | |
965 | Address limit = static_cast<Address>(1) << ((valsize - 1) >> 1); | |
966 | limit <<= ((valsize - 1) >> 1); | |
967 | limit <<= ((valsize - 1) - 2 * ((valsize - 1) >> 1)); | |
968 | return value + limit > (limit << 1) - 1; | |
969 | } | |
970 | ||
971 | template<int valsize> | |
972 | static inline bool | |
973 | has_overflow_bitfield(Address value) | |
974 | { | |
975 | Address limit = static_cast<Address>(1) << ((valsize - 1) >> 1); | |
976 | limit <<= ((valsize - 1) >> 1); | |
977 | limit <<= ((valsize - 1) - 2 * ((valsize - 1) >> 1)); | |
978 | return value > (limit << 1) - 1 && value + limit > (limit << 1) - 1; | |
979 | } | |
980 | ||
981 | template<int valsize> | |
f4baf0d4 AM |
982 | static inline Status |
983 | overflowed(Address value, Overflow_check overflow) | |
dd93cd0a | 984 | { |
f4baf0d4 | 985 | if (overflow == CHECK_SIGNED) |
dd93cd0a AM |
986 | { |
987 | if (has_overflow_signed<valsize>(value)) | |
f4baf0d4 | 988 | return STATUS_OVERFLOW; |
dd93cd0a | 989 | } |
f4baf0d4 | 990 | else if (overflow == CHECK_BITFIELD) |
dd93cd0a AM |
991 | { |
992 | if (has_overflow_bitfield<valsize>(value)) | |
f4baf0d4 | 993 | return STATUS_OVERFLOW; |
dd93cd0a | 994 | } |
f4baf0d4 | 995 | return STATUS_OK; |
dd93cd0a AM |
996 | } |
997 | ||
cf43a2fe | 998 | // Do a simple RELA relocation |
42cacb20 | 999 | template<int valsize> |
f4baf0d4 AM |
1000 | static inline Status |
1001 | rela(unsigned char* view, Address value, Overflow_check overflow) | |
dd93cd0a AM |
1002 | { |
1003 | typedef typename elfcpp::Swap<valsize, big_endian>::Valtype Valtype; | |
1004 | Valtype* wv = reinterpret_cast<Valtype*>(view); | |
1005 | elfcpp::Swap<valsize, big_endian>::writeval(wv, value); | |
1006 | return overflowed<valsize>(value, overflow); | |
1007 | } | |
1008 | ||
1009 | template<int valsize> | |
f4baf0d4 | 1010 | static inline Status |
42cacb20 DE |
1011 | rela(unsigned char* view, |
1012 | unsigned int right_shift, | |
c9269dff AM |
1013 | typename elfcpp::Valtype_base<valsize>::Valtype dst_mask, |
1014 | Address value, | |
f4baf0d4 | 1015 | Overflow_check overflow) |
42cacb20 DE |
1016 | { |
1017 | typedef typename elfcpp::Swap<valsize, big_endian>::Valtype Valtype; | |
1018 | Valtype* wv = reinterpret_cast<Valtype*>(view); | |
1019 | Valtype val = elfcpp::Swap<valsize, big_endian>::readval(wv); | |
dd93cd0a | 1020 | Valtype reloc = value >> right_shift; |
42cacb20 DE |
1021 | val &= ~dst_mask; |
1022 | reloc &= dst_mask; | |
42cacb20 | 1023 | elfcpp::Swap<valsize, big_endian>::writeval(wv, val | reloc); |
dd93cd0a | 1024 | return overflowed<valsize>(value >> right_shift, overflow); |
42cacb20 DE |
1025 | } |
1026 | ||
cf43a2fe | 1027 | // Do a simple RELA relocation, unaligned. |
42cacb20 | 1028 | template<int valsize> |
f4baf0d4 AM |
1029 | static inline Status |
1030 | rela_ua(unsigned char* view, Address value, Overflow_check overflow) | |
dd93cd0a AM |
1031 | { |
1032 | elfcpp::Swap_unaligned<valsize, big_endian>::writeval(view, value); | |
1033 | return overflowed<valsize>(value, overflow); | |
1034 | } | |
1035 | ||
1036 | template<int valsize> | |
f4baf0d4 | 1037 | static inline Status |
cf43a2fe AM |
1038 | rela_ua(unsigned char* view, |
1039 | unsigned int right_shift, | |
c9269dff AM |
1040 | typename elfcpp::Valtype_base<valsize>::Valtype dst_mask, |
1041 | Address value, | |
f4baf0d4 | 1042 | Overflow_check overflow) |
42cacb20 | 1043 | { |
c9269dff AM |
1044 | typedef typename elfcpp::Swap_unaligned<valsize, big_endian>::Valtype |
1045 | Valtype; | |
dd93cd0a AM |
1046 | Valtype val = elfcpp::Swap<valsize, big_endian>::readval(view); |
1047 | Valtype reloc = value >> right_shift; | |
42cacb20 DE |
1048 | val &= ~dst_mask; |
1049 | reloc &= dst_mask; | |
dd93cd0a AM |
1050 | elfcpp::Swap_unaligned<valsize, big_endian>::writeval(view, val | reloc); |
1051 | return overflowed<valsize>(value >> right_shift, overflow); | |
42cacb20 DE |
1052 | } |
1053 | ||
42cacb20 | 1054 | public: |
dd93cd0a | 1055 | // R_PPC64_ADDR64: (Symbol + Addend) |
42cacb20 | 1056 | static inline void |
dd93cd0a | 1057 | addr64(unsigned char* view, Address value) |
f4baf0d4 | 1058 | { This::template rela<64>(view, value, CHECK_NONE); } |
42cacb20 | 1059 | |
dd93cd0a | 1060 | // R_PPC64_UADDR64: (Symbol + Addend) unaligned |
42cacb20 | 1061 | static inline void |
dd93cd0a | 1062 | addr64_u(unsigned char* view, Address value) |
f4baf0d4 | 1063 | { This::template rela_ua<64>(view, value, CHECK_NONE); } |
dd93cd0a AM |
1064 | |
1065 | // R_POWERPC_ADDR32: (Symbol + Addend) | |
f4baf0d4 AM |
1066 | static inline Status |
1067 | addr32(unsigned char* view, Address value, Overflow_check overflow) | |
dd93cd0a AM |
1068 | { return This::template rela<32>(view, value, overflow); } |
1069 | ||
1070 | // R_POWERPC_UADDR32: (Symbol + Addend) unaligned | |
f4baf0d4 AM |
1071 | static inline Status |
1072 | addr32_u(unsigned char* view, Address value, Overflow_check overflow) | |
dd93cd0a AM |
1073 | { return This::template rela_ua<32>(view, value, overflow); } |
1074 | ||
1075 | // R_POWERPC_ADDR24: (Symbol + Addend) & 0x3fffffc | |
f4baf0d4 AM |
1076 | static inline Status |
1077 | addr24(unsigned char* view, Address value, Overflow_check overflow) | |
dd93cd0a | 1078 | { |
f4baf0d4 AM |
1079 | Status stat = This::template rela<32>(view, 0, 0x03fffffc, value, overflow); |
1080 | if (overflow != CHECK_NONE && (value & 3) != 0) | |
1081 | stat = STATUS_OVERFLOW; | |
dd93cd0a AM |
1082 | return stat; |
1083 | } | |
42cacb20 DE |
1084 | |
1085 | // R_POWERPC_ADDR16: (Symbol + Addend) & 0xffff | |
f4baf0d4 AM |
1086 | static inline Status |
1087 | addr16(unsigned char* view, Address value, Overflow_check overflow) | |
dd93cd0a | 1088 | { return This::template rela<16>(view, value, overflow); } |
42cacb20 | 1089 | |
dd93cd0a | 1090 | // R_POWERPC_ADDR16: (Symbol + Addend) & 0xffff, unaligned |
f4baf0d4 AM |
1091 | static inline Status |
1092 | addr16_u(unsigned char* view, Address value, Overflow_check overflow) | |
dd93cd0a | 1093 | { return This::template rela_ua<16>(view, value, overflow); } |
42cacb20 | 1094 | |
dd93cd0a | 1095 | // R_POWERPC_ADDR16_DS: (Symbol + Addend) & 0xfffc |
f4baf0d4 AM |
1096 | static inline Status |
1097 | addr16_ds(unsigned char* view, Address value, Overflow_check overflow) | |
dd93cd0a | 1098 | { |
f4baf0d4 AM |
1099 | Status stat = This::template rela<16>(view, 0, 0xfffc, value, overflow); |
1100 | if (overflow != CHECK_NONE && (value & 3) != 0) | |
1101 | stat = STATUS_OVERFLOW; | |
dd93cd0a AM |
1102 | return stat; |
1103 | } | |
42cacb20 | 1104 | |
42cacb20 DE |
1105 | // R_POWERPC_ADDR16_HI: ((Symbol + Addend) >> 16) & 0xffff |
1106 | static inline void | |
dd93cd0a | 1107 | addr16_hi(unsigned char* view, Address value) |
f4baf0d4 | 1108 | { This::template rela<16>(view, 16, 0xffff, value, CHECK_NONE); } |
42cacb20 | 1109 | |
c9269dff | 1110 | // R_POWERPC_ADDR16_HA: ((Symbol + Addend + 0x8000) >> 16) & 0xffff |
42cacb20 | 1111 | static inline void |
dd93cd0a AM |
1112 | addr16_ha(unsigned char* view, Address value) |
1113 | { This::addr16_hi(view, value + 0x8000); } | |
42cacb20 | 1114 | |
dd93cd0a | 1115 | // R_POWERPC_ADDR16_HIGHER: ((Symbol + Addend) >> 32) & 0xffff |
42cacb20 | 1116 | static inline void |
dd93cd0a | 1117 | addr16_hi2(unsigned char* view, Address value) |
f4baf0d4 | 1118 | { This::template rela<16>(view, 32, 0xffff, value, CHECK_NONE); } |
42cacb20 | 1119 | |
dd93cd0a | 1120 | // R_POWERPC_ADDR16_HIGHERA: ((Symbol + Addend + 0x8000) >> 32) & 0xffff |
42cacb20 | 1121 | static inline void |
dd93cd0a AM |
1122 | addr16_ha2(unsigned char* view, Address value) |
1123 | { This::addr16_hi2(view, value + 0x8000); } | |
42cacb20 | 1124 | |
dd93cd0a | 1125 | // R_POWERPC_ADDR16_HIGHEST: ((Symbol + Addend) >> 48) & 0xffff |
42cacb20 | 1126 | static inline void |
dd93cd0a | 1127 | addr16_hi3(unsigned char* view, Address value) |
f4baf0d4 | 1128 | { This::template rela<16>(view, 48, 0xffff, value, CHECK_NONE); } |
42cacb20 | 1129 | |
dd93cd0a | 1130 | // R_POWERPC_ADDR16_HIGHESTA: ((Symbol + Addend + 0x8000) >> 48) & 0xffff |
42cacb20 | 1131 | static inline void |
dd93cd0a AM |
1132 | addr16_ha3(unsigned char* view, Address value) |
1133 | { This::addr16_hi3(view, value + 0x8000); } | |
1134 | ||
1135 | // R_POWERPC_ADDR14: (Symbol + Addend) & 0xfffc | |
f4baf0d4 AM |
1136 | static inline Status |
1137 | addr14(unsigned char* view, Address value, Overflow_check overflow) | |
dd93cd0a | 1138 | { |
f4baf0d4 AM |
1139 | Status stat = This::template rela<32>(view, 0, 0xfffc, value, overflow); |
1140 | if (overflow != CHECK_NONE && (value & 3) != 0) | |
1141 | stat = STATUS_OVERFLOW; | |
dd93cd0a AM |
1142 | return stat; |
1143 | } | |
cf43a2fe AM |
1144 | }; |
1145 | ||
c9269dff AM |
1146 | // Stash away the index of .got2 or .opd in a relocatable object, if |
1147 | // such a section exists. | |
cf43a2fe AM |
1148 | |
1149 | template<int size, bool big_endian> | |
1150 | bool | |
1151 | Powerpc_relobj<size, big_endian>::do_find_special_sections( | |
1152 | Read_symbols_data* sd) | |
1153 | { | |
c9269dff AM |
1154 | const unsigned char* const pshdrs = sd->section_headers->data(); |
1155 | const unsigned char* namesu = sd->section_names->data(); | |
1156 | const char* names = reinterpret_cast<const char*>(namesu); | |
1157 | section_size_type names_size = sd->section_names_size; | |
1158 | const unsigned char* s; | |
1159 | ||
1160 | s = this->find_shdr(pshdrs, size == 32 ? ".got2" : ".opd", | |
1161 | names, names_size, NULL); | |
1162 | if (s != NULL) | |
1163 | { | |
1164 | unsigned int ndx = (s - pshdrs) / elfcpp::Elf_sizes<size>::shdr_size; | |
1165 | this->special_ = ndx; | |
1166 | } | |
1167 | return Sized_relobj_file<size, big_endian>::do_find_special_sections(sd); | |
1168 | } | |
1169 | ||
1170 | // Examine .rela.opd to build info about function entry points. | |
1171 | ||
1172 | template<int size, bool big_endian> | |
1173 | void | |
1174 | Powerpc_relobj<size, big_endian>::scan_opd_relocs( | |
1175 | size_t reloc_count, | |
1176 | const unsigned char* prelocs, | |
1177 | const unsigned char* plocal_syms) | |
1178 | { | |
1179 | if (size == 64) | |
cf43a2fe | 1180 | { |
c9269dff AM |
1181 | typedef typename Reloc_types<elfcpp::SHT_RELA, size, big_endian>::Reloc |
1182 | Reltype; | |
1183 | const int reloc_size | |
1184 | = Reloc_types<elfcpp::SHT_RELA, size, big_endian>::reloc_size; | |
1185 | const int sym_size = elfcpp::Elf_sizes<size>::sym_size; | |
1186 | ||
1187 | for (size_t i = 0; i < reloc_count; ++i, prelocs += reloc_size) | |
cf43a2fe | 1188 | { |
c9269dff AM |
1189 | Reltype reloc(prelocs); |
1190 | typename elfcpp::Elf_types<size>::Elf_WXword r_info | |
1191 | = reloc.get_r_info(); | |
1192 | unsigned int r_type = elfcpp::elf_r_type<size>(r_info); | |
1193 | if (r_type == elfcpp::R_PPC64_ADDR64) | |
1194 | { | |
1195 | unsigned int r_sym = elfcpp::elf_r_sym<size>(r_info); | |
1196 | typename elfcpp::Elf_types<size>::Elf_Addr value; | |
1197 | bool is_ordinary; | |
1198 | unsigned int shndx; | |
1199 | if (r_sym < this->local_symbol_count()) | |
1200 | { | |
1201 | typename elfcpp::Sym<size, big_endian> | |
1202 | lsym(plocal_syms + r_sym * sym_size); | |
1203 | shndx = lsym.get_st_shndx(); | |
1204 | shndx = this->adjust_sym_shndx(r_sym, shndx, &is_ordinary); | |
1205 | value = lsym.get_st_value(); | |
1206 | } | |
1207 | else | |
1208 | shndx = this->symbol_section_and_value(r_sym, &value, | |
1209 | &is_ordinary); | |
1210 | this->set_opd_ent(reloc.get_r_offset(), shndx, | |
1211 | value + reloc.get_r_addend()); | |
1212 | } | |
1213 | } | |
1214 | } | |
1215 | } | |
1216 | ||
1217 | template<int size, bool big_endian> | |
1218 | void | |
1219 | Powerpc_relobj<size, big_endian>::do_read_relocs(Read_relocs_data* rd) | |
1220 | { | |
1221 | Sized_relobj_file<size, big_endian>::do_read_relocs(rd); | |
1222 | if (size == 64) | |
1223 | { | |
1224 | for (Read_relocs_data::Relocs_list::iterator p = rd->relocs.begin(); | |
1225 | p != rd->relocs.end(); | |
1226 | ++p) | |
1227 | { | |
1228 | if (p->data_shndx == this->opd_shndx()) | |
1229 | { | |
1230 | this->init_opd(this->section_size(this->opd_shndx())); | |
1231 | this->scan_opd_relocs(p->reloc_count, p->contents->data(), | |
1232 | rd->local_symbols->data()); | |
1233 | break; | |
1234 | } | |
cf43a2fe AM |
1235 | } |
1236 | } | |
cf43a2fe AM |
1237 | } |
1238 | ||
1239 | // Set up PowerPC target specific relobj. | |
1240 | ||
1241 | template<int size, bool big_endian> | |
1242 | Object* | |
1243 | Target_powerpc<size, big_endian>::do_make_elf_object( | |
1244 | const std::string& name, | |
1245 | Input_file* input_file, | |
1246 | off_t offset, const elfcpp::Ehdr<size, big_endian>& ehdr) | |
1247 | { | |
1248 | int et = ehdr.get_e_type(); | |
957564c9 AS |
1249 | // ET_EXEC files are valid input for --just-symbols/-R, |
1250 | // and we treat them as relocatable objects. | |
1251 | if (et == elfcpp::ET_REL | |
1252 | || (et == elfcpp::ET_EXEC && input_file->just_symbols())) | |
cf43a2fe AM |
1253 | { |
1254 | Powerpc_relobj<size, big_endian>* obj = | |
c9269dff | 1255 | new Powerpc_relobj<size, big_endian>(name, input_file, offset, ehdr); |
cf43a2fe AM |
1256 | obj->setup(); |
1257 | return obj; | |
1258 | } | |
1259 | else if (et == elfcpp::ET_DYN) | |
1260 | { | |
1261 | Sized_dynobj<size, big_endian>* obj = | |
c9269dff | 1262 | new Sized_dynobj<size, big_endian>(name, input_file, offset, ehdr); |
cf43a2fe AM |
1263 | obj->setup(); |
1264 | return obj; | |
1265 | } | |
1266 | else | |
1267 | { | |
c9269dff | 1268 | gold_error(_("%s: unsupported ELF file type %d"), name.c_str(), et); |
cf43a2fe AM |
1269 | return NULL; |
1270 | } | |
1271 | } | |
1272 | ||
1273 | template<int size, bool big_endian> | |
1274 | class Output_data_got_powerpc : public Output_data_got<size, big_endian> | |
1275 | { | |
1276 | public: | |
1277 | typedef typename elfcpp::Elf_types<size>::Elf_Addr Valtype; | |
1278 | typedef Output_data_reloc<elfcpp::SHT_RELA, true, size, big_endian> Rela_dyn; | |
1279 | ||
1280 | Output_data_got_powerpc(Symbol_table* symtab, Layout* layout) | |
1281 | : Output_data_got<size, big_endian>(), | |
1282 | symtab_(symtab), layout_(layout), | |
1283 | header_ent_cnt_(size == 32 ? 3 : 1), | |
1284 | header_index_(size == 32 ? 0x2000 : 0) | |
1285 | {} | |
1286 | ||
1287 | class Got_entry; | |
1288 | ||
1289 | // Create a new GOT entry and return its offset. | |
1290 | unsigned int | |
1291 | add_got_entry(Got_entry got_entry) | |
42cacb20 | 1292 | { |
cf43a2fe AM |
1293 | this->reserve_ent(); |
1294 | return Output_data_got<size, big_endian>::add_got_entry(got_entry); | |
1295 | } | |
42cacb20 | 1296 | |
cf43a2fe AM |
1297 | // Create a pair of new GOT entries and return the offset of the first. |
1298 | unsigned int | |
1299 | add_got_entry_pair(Got_entry got_entry_1, Got_entry got_entry_2) | |
1300 | { | |
1301 | this->reserve_ent(2); | |
1302 | return Output_data_got<size, big_endian>::add_got_entry_pair(got_entry_1, | |
1303 | got_entry_2); | |
1304 | } | |
42cacb20 | 1305 | |
dd93cd0a AM |
1306 | unsigned int |
1307 | add_constant_pair(Valtype c1, Valtype c2) | |
1308 | { | |
1309 | this->reserve_ent(2); | |
1310 | unsigned int got_offset = this->add_constant(c1); | |
1311 | this->add_constant(c2); | |
1312 | return got_offset; | |
1313 | } | |
1314 | ||
1315 | // Offset of _GLOBAL_OFFSET_TABLE_. | |
cf43a2fe AM |
1316 | unsigned int |
1317 | g_o_t() const | |
1318 | { | |
1319 | return this->got_offset(this->header_index_); | |
42cacb20 | 1320 | } |
cf43a2fe | 1321 | |
dd93cd0a AM |
1322 | // Offset of base used to access the GOT/TOC. |
1323 | // The got/toc pointer reg will be set to this value. | |
1324 | typename elfcpp::Elf_types<size>::Elf_Off | |
1325 | got_base_offset(const Powerpc_relobj<size, big_endian>* object) const | |
1326 | { | |
1327 | if (size == 32) | |
1328 | return this->g_o_t(); | |
1329 | else | |
1330 | return (this->output_section()->address() | |
1331 | + object->toc_base_offset() | |
1332 | - this->address()); | |
1333 | } | |
1334 | ||
cf43a2fe AM |
1335 | // Ensure our GOT has a header. |
1336 | void | |
1337 | set_final_data_size() | |
1338 | { | |
1339 | if (this->header_ent_cnt_ != 0) | |
1340 | this->make_header(); | |
1341 | Output_data_got<size, big_endian>::set_final_data_size(); | |
1342 | } | |
1343 | ||
1344 | // First word of GOT header needs some values that are not | |
1345 | // handled by Output_data_got so poke them in here. | |
1346 | // For 32-bit, address of .dynamic, for 64-bit, address of TOCbase. | |
1347 | void | |
1348 | do_write(Output_file* of) | |
1349 | { | |
6ce78956 AM |
1350 | this->replace_constant(this->header_index_, |
1351 | (size == 32 | |
1352 | ? this->layout_->dynamic_section()->address() | |
dd93cd0a | 1353 | : this->output_section()->address() + 0x8000)); |
cf43a2fe AM |
1354 | |
1355 | Output_data_got<size, big_endian>::do_write(of); | |
1356 | } | |
1357 | ||
1358 | private: | |
1359 | void | |
1360 | reserve_ent(unsigned int cnt = 1) | |
1361 | { | |
1362 | if (this->header_ent_cnt_ == 0) | |
1363 | return; | |
1364 | if (this->num_entries() + cnt > this->header_index_) | |
1365 | this->make_header(); | |
1366 | } | |
1367 | ||
1368 | void | |
1369 | make_header() | |
1370 | { | |
1371 | this->header_ent_cnt_ = 0; | |
1372 | this->header_index_ = this->num_entries(); | |
1373 | if (size == 32) | |
1374 | { | |
1375 | Output_data_got<size, big_endian>::add_constant(0); | |
1376 | Output_data_got<size, big_endian>::add_constant(0); | |
1377 | Output_data_got<size, big_endian>::add_constant(0); | |
1378 | ||
1379 | // Define _GLOBAL_OFFSET_TABLE_ at the header | |
1380 | this->symtab_->define_in_output_data("_GLOBAL_OFFSET_TABLE_", NULL, | |
1381 | Symbol_table::PREDEFINED, | |
1382 | this, this->g_o_t(), 0, | |
1383 | elfcpp::STT_OBJECT, | |
1384 | elfcpp::STB_LOCAL, | |
1385 | elfcpp::STV_HIDDEN, | |
1386 | 0, false, false); | |
1387 | } | |
1388 | else | |
1389 | Output_data_got<size, big_endian>::add_constant(0); | |
1390 | } | |
1391 | ||
1392 | // Stashed pointers. | |
1393 | Symbol_table* symtab_; | |
1394 | Layout* layout_; | |
1395 | ||
1396 | // GOT header size. | |
1397 | unsigned int header_ent_cnt_; | |
1398 | // GOT header index. | |
1399 | unsigned int header_index_; | |
42cacb20 DE |
1400 | }; |
1401 | ||
1402 | // Get the GOT section, creating it if necessary. | |
1403 | ||
1404 | template<int size, bool big_endian> | |
cf43a2fe | 1405 | Output_data_got_powerpc<size, big_endian>* |
42cacb20 DE |
1406 | Target_powerpc<size, big_endian>::got_section(Symbol_table* symtab, |
1407 | Layout* layout) | |
1408 | { | |
1409 | if (this->got_ == NULL) | |
1410 | { | |
1411 | gold_assert(symtab != NULL && layout != NULL); | |
1412 | ||
cf43a2fe AM |
1413 | this->got_ |
1414 | = new Output_data_got_powerpc<size, big_endian>(symtab, layout); | |
42cacb20 DE |
1415 | |
1416 | layout->add_output_section_data(".got", elfcpp::SHT_PROGBITS, | |
1417 | elfcpp::SHF_ALLOC | elfcpp::SHF_WRITE, | |
22f0da72 | 1418 | this->got_, ORDER_DATA, false); |
42cacb20 DE |
1419 | } |
1420 | ||
1421 | return this->got_; | |
1422 | } | |
1423 | ||
1424 | // Get the dynamic reloc section, creating it if necessary. | |
1425 | ||
1426 | template<int size, bool big_endian> | |
1427 | typename Target_powerpc<size, big_endian>::Reloc_section* | |
1428 | Target_powerpc<size, big_endian>::rela_dyn_section(Layout* layout) | |
1429 | { | |
1430 | if (this->rela_dyn_ == NULL) | |
1431 | { | |
1432 | gold_assert(layout != NULL); | |
1433 | this->rela_dyn_ = new Reloc_section(parameters->options().combreloc()); | |
1434 | layout->add_output_section_data(".rela.dyn", elfcpp::SHT_RELA, | |
22f0da72 ILT |
1435 | elfcpp::SHF_ALLOC, this->rela_dyn_, |
1436 | ORDER_DYNAMIC_RELOCS, false); | |
42cacb20 DE |
1437 | } |
1438 | return this->rela_dyn_; | |
1439 | } | |
1440 | ||
1441 | // A class to handle the PLT data. | |
1442 | ||
1443 | template<int size, bool big_endian> | |
cf43a2fe | 1444 | class Output_data_plt_powerpc : public Output_section_data_build |
42cacb20 DE |
1445 | { |
1446 | public: | |
1447 | typedef Output_data_reloc<elfcpp::SHT_RELA, true, | |
1448 | size, big_endian> Reloc_section; | |
1449 | ||
cf43a2fe | 1450 | Output_data_plt_powerpc(Layout*, Target_powerpc<size, big_endian>*); |
42cacb20 DE |
1451 | |
1452 | // Add an entry to the PLT. | |
cf43a2fe AM |
1453 | void |
1454 | add_entry(Symbol*); | |
42cacb20 DE |
1455 | |
1456 | // Return the .rela.plt section data. | |
cf43a2fe AM |
1457 | const Reloc_section* |
1458 | rel_plt() const | |
1459 | { | |
42cacb20 DE |
1460 | return this->rel_; |
1461 | } | |
1462 | ||
0e70b911 CC |
1463 | // Return the number of PLT entries. |
1464 | unsigned int | |
1465 | entry_count() const | |
d83ce4e3 AM |
1466 | { |
1467 | return ((this->current_data_size() - initial_plt_entry_size) | |
1468 | / plt_entry_size); | |
1469 | } | |
0e70b911 CC |
1470 | |
1471 | // Return the offset of the first non-reserved PLT entry. | |
1472 | static unsigned int | |
1473 | first_plt_entry_offset() | |
cf43a2fe | 1474 | { return initial_plt_entry_size; } |
0e70b911 CC |
1475 | |
1476 | // Return the size of a PLT entry. | |
1477 | static unsigned int | |
1478 | get_plt_entry_size() | |
cf43a2fe | 1479 | { return plt_entry_size; } |
0e70b911 | 1480 | |
42cacb20 | 1481 | protected: |
42cacb20 | 1482 | void |
cf43a2fe | 1483 | do_adjust_output_section(Output_section* os) |
42cacb20 | 1484 | { |
cf43a2fe | 1485 | os->set_entsize(0); |
42cacb20 DE |
1486 | } |
1487 | ||
6ce78956 AM |
1488 | // Write to a map file. |
1489 | void | |
1490 | do_print_to_mapfile(Mapfile* mapfile) const | |
1491 | { mapfile->print_output_data(this, _("** PLT")); } | |
1492 | ||
cf43a2fe AM |
1493 | private: |
1494 | // The size of an entry in the PLT. | |
1495 | static const int plt_entry_size = size == 32 ? 4 : 24; | |
1496 | // The size of the first reserved entry. | |
1497 | static const int initial_plt_entry_size = size == 32 ? 0 : 24; | |
1498 | ||
42cacb20 DE |
1499 | // Write out the PLT data. |
1500 | void | |
1501 | do_write(Output_file*); | |
1502 | ||
1503 | // The reloc section. | |
1504 | Reloc_section* rel_; | |
cf43a2fe AM |
1505 | // Allows access to .glink for do_write. |
1506 | Target_powerpc<size, big_endian>* targ_; | |
42cacb20 DE |
1507 | }; |
1508 | ||
cf43a2fe | 1509 | // Create the PLT section. |
42cacb20 DE |
1510 | |
1511 | template<int size, bool big_endian> | |
d83ce4e3 AM |
1512 | Output_data_plt_powerpc<size, big_endian>::Output_data_plt_powerpc( |
1513 | Layout* layout, | |
1514 | Target_powerpc<size, big_endian>* targ) | |
cf43a2fe AM |
1515 | : Output_section_data_build(size == 32 ? 4 : 8), |
1516 | targ_(targ) | |
42cacb20 DE |
1517 | { |
1518 | this->rel_ = new Reloc_section(false); | |
1519 | layout->add_output_section_data(".rela.plt", elfcpp::SHT_RELA, | |
22f0da72 ILT |
1520 | elfcpp::SHF_ALLOC, this->rel_, |
1521 | ORDER_DYNAMIC_PLT_RELOCS, false); | |
42cacb20 DE |
1522 | } |
1523 | ||
42cacb20 DE |
1524 | // Add an entry to the PLT. |
1525 | ||
1526 | template<int size, bool big_endian> | |
1527 | void | |
1528 | Output_data_plt_powerpc<size, big_endian>::add_entry(Symbol* gsym) | |
1529 | { | |
cf43a2fe AM |
1530 | if (!gsym->has_plt_offset()) |
1531 | { | |
1532 | off_t off = this->current_data_size(); | |
1533 | ||
1534 | if (off == 0) | |
1535 | off += initial_plt_entry_size; | |
1536 | gsym->set_plt_offset(off); | |
1537 | gsym->set_needs_dynsym_entry(); | |
1538 | this->rel_->add_global(gsym, elfcpp::R_POWERPC_JMP_SLOT, this, off, 0); | |
1539 | off += plt_entry_size; | |
1540 | this->set_current_data_size(off); | |
1541 | } | |
42cacb20 DE |
1542 | } |
1543 | ||
dd93cd0a AM |
1544 | static const uint32_t add_0_11_11 = 0x7c0b5a14; |
1545 | static const uint32_t add_3_3_2 = 0x7c631214; | |
1546 | static const uint32_t add_3_3_13 = 0x7c636a14; | |
1547 | static const uint32_t add_11_0_11 = 0x7d605a14; | |
1548 | static const uint32_t add_12_2_11 = 0x7d825a14; | |
1549 | static const uint32_t addi_11_11 = 0x396b0000; | |
1550 | static const uint32_t addi_12_12 = 0x398c0000; | |
1551 | static const uint32_t addi_2_2 = 0x38420000; | |
1552 | static const uint32_t addi_3_2 = 0x38620000; | |
1553 | static const uint32_t addi_3_3 = 0x38630000; | |
1554 | static const uint32_t addis_0_2 = 0x3c020000; | |
1555 | static const uint32_t addis_0_13 = 0x3c0d0000; | |
c9269dff AM |
1556 | static const uint32_t addis_11_11 = 0x3d6b0000; |
1557 | static const uint32_t addis_11_30 = 0x3d7e0000; | |
1558 | static const uint32_t addis_12_12 = 0x3d8c0000; | |
dd93cd0a AM |
1559 | static const uint32_t addis_12_2 = 0x3d820000; |
1560 | static const uint32_t addis_3_2 = 0x3c620000; | |
1561 | static const uint32_t addis_3_13 = 0x3c6d0000; | |
c9269dff AM |
1562 | static const uint32_t b = 0x48000000; |
1563 | static const uint32_t bcl_20_31 = 0x429f0005; | |
1564 | static const uint32_t bctr = 0x4e800420; | |
1565 | static const uint32_t blrl = 0x4e800021; | |
dd93cd0a AM |
1566 | static const uint32_t cror_15_15_15 = 0x4def7b82; |
1567 | static const uint32_t cror_31_31_31 = 0x4ffffb82; | |
1568 | static const uint32_t ld_11_12 = 0xe96c0000; | |
1569 | static const uint32_t ld_11_2 = 0xe9620000; | |
1570 | static const uint32_t ld_2_1 = 0xe8410000; | |
1571 | static const uint32_t ld_2_11 = 0xe84b0000; | |
1572 | static const uint32_t ld_2_12 = 0xe84c0000; | |
1573 | static const uint32_t ld_2_2 = 0xe8420000; | |
1574 | static const uint32_t li_0_0 = 0x38000000; | |
1575 | static const uint32_t lis_0_0 = 0x3c000000; | |
c9269dff AM |
1576 | static const uint32_t lis_11 = 0x3d600000; |
1577 | static const uint32_t lis_12 = 0x3d800000; | |
c9269dff AM |
1578 | static const uint32_t lwz_0_12 = 0x800c0000; |
1579 | static const uint32_t lwz_11_11 = 0x816b0000; | |
1580 | static const uint32_t lwz_11_30 = 0x817e0000; | |
1581 | static const uint32_t lwz_12_12 = 0x818c0000; | |
dd93cd0a | 1582 | static const uint32_t lwzu_0_12 = 0x840c0000; |
c9269dff | 1583 | static const uint32_t mflr_0 = 0x7c0802a6; |
dd93cd0a | 1584 | static const uint32_t mflr_11 = 0x7d6802a6; |
c9269dff AM |
1585 | static const uint32_t mflr_12 = 0x7d8802a6; |
1586 | static const uint32_t mtctr_0 = 0x7c0903a6; | |
1587 | static const uint32_t mtctr_11 = 0x7d6903a6; | |
1588 | static const uint32_t mtlr_0 = 0x7c0803a6; | |
c9269dff | 1589 | static const uint32_t mtlr_12 = 0x7d8803a6; |
dd93cd0a | 1590 | static const uint32_t nop = 0x60000000; |
c9269dff | 1591 | static const uint32_t ori_0_0_0 = 0x60000000; |
dd93cd0a AM |
1592 | static const uint32_t std_2_1 = 0xf8410000; |
1593 | static const uint32_t sub_11_11_12 = 0x7d6c5850; | |
42cacb20 DE |
1594 | |
1595 | // Write out the PLT. | |
1596 | ||
1597 | template<int size, bool big_endian> | |
1598 | void | |
1599 | Output_data_plt_powerpc<size, big_endian>::do_write(Output_file* of) | |
1600 | { | |
cf43a2fe AM |
1601 | if (size == 32) |
1602 | { | |
1603 | const off_t offset = this->offset(); | |
1604 | const section_size_type oview_size | |
1605 | = convert_to_section_size_type(this->data_size()); | |
1606 | unsigned char* const oview = of->get_output_view(offset, oview_size); | |
1607 | unsigned char* pov = oview; | |
1608 | unsigned char* endpov = oview + oview_size; | |
1609 | ||
1610 | // The address the .glink branch table | |
1611 | const Output_data_glink<size, big_endian>* glink | |
1612 | = this->targ_->glink_section(); | |
1613 | elfcpp::Elf_types<32>::Elf_Addr branch_tab | |
1614 | = glink->address() + glink->pltresolve(); | |
1615 | ||
1616 | while (pov < endpov) | |
1617 | { | |
1618 | elfcpp::Swap<32, big_endian>::writeval(pov, branch_tab); | |
1619 | pov += 4; | |
1620 | branch_tab += 4; | |
1621 | } | |
1622 | ||
1623 | of->write_output_view(offset, oview_size, oview); | |
1624 | } | |
1625 | } | |
1626 | ||
1627 | // Create the PLT section. | |
1628 | ||
1629 | template<int size, bool big_endian> | |
1630 | void | |
1631 | Target_powerpc<size, big_endian>::make_plt_section(Layout* layout) | |
1632 | { | |
1633 | if (this->plt_ == NULL) | |
1634 | { | |
1635 | if (this->glink_ == NULL) | |
1636 | make_glink_section(layout); | |
1637 | ||
1638 | // Ensure that .rela.dyn always appears before .rela.plt This is | |
1639 | // necessary due to how, on PowerPC and some other targets, .rela.dyn | |
1640 | // needs to include .rela.plt in it's range. | |
1641 | this->rela_dyn_section(layout); | |
1642 | ||
1643 | this->plt_ = new Output_data_plt_powerpc<size, big_endian>(layout, this); | |
1644 | layout->add_output_section_data(".plt", | |
1645 | (size == 32 | |
1646 | ? elfcpp::SHT_PROGBITS | |
1647 | : elfcpp::SHT_NOBITS), | |
1648 | elfcpp::SHF_ALLOC | elfcpp::SHF_WRITE, | |
1649 | this->plt_, | |
1650 | (size == 32 | |
1651 | ? ORDER_SMALL_DATA | |
1652 | : ORDER_SMALL_BSS), | |
1653 | false); | |
1654 | } | |
1655 | } | |
1656 | ||
1657 | // A class to handle .glink. | |
1658 | ||
1659 | template<int size, bool big_endian> | |
1660 | class Output_data_glink : public Output_section_data | |
1661 | { | |
1662 | public: | |
c9269dff AM |
1663 | static const int pltresolve_size = 16*4; |
1664 | ||
cf43a2fe AM |
1665 | Output_data_glink(Target_powerpc<size, big_endian>*); |
1666 | ||
1667 | // Add an entry | |
1668 | void | |
1669 | add_entry(const Symbol*, const elfcpp::Rela<size, big_endian>&, | |
d1a8cabd | 1670 | const Sized_relobj<size, big_endian>*); |
cf43a2fe AM |
1671 | |
1672 | unsigned int | |
1673 | find_entry(const Symbol*, const elfcpp::Rela<size, big_endian>&, | |
d1a8cabd | 1674 | const Sized_relobj<size, big_endian>*) const; |
cf43a2fe AM |
1675 | |
1676 | unsigned int | |
1677 | glink_entry_size() const | |
1678 | { | |
1679 | if (size == 32) | |
1680 | return 4 * 4; | |
1681 | else | |
1682 | // FIXME: We should be using multiple glink sections for | |
1683 | // stubs to support > 33M applications. | |
1684 | return 8 * 4; | |
1685 | } | |
1686 | ||
1687 | off_t | |
1688 | pltresolve() const | |
1689 | { | |
1690 | return this->pltresolve_; | |
1691 | } | |
1692 | ||
6ce78956 AM |
1693 | protected: |
1694 | // Write to a map file. | |
1695 | void | |
1696 | do_print_to_mapfile(Mapfile* mapfile) const | |
1697 | { mapfile->print_output_data(this, _("** glink")); } | |
1698 | ||
cf43a2fe | 1699 | private: |
cf43a2fe AM |
1700 | void |
1701 | set_final_data_size(); | |
1702 | ||
1703 | // Write out .glink | |
1704 | void | |
1705 | do_write(Output_file*); | |
1706 | ||
d1a8cabd | 1707 | class Glink_sym_ent |
cf43a2fe | 1708 | { |
d1a8cabd AM |
1709 | public: |
1710 | Glink_sym_ent(const Symbol* sym, | |
cf43a2fe | 1711 | const elfcpp::Rela<size, big_endian>& reloc, |
d1a8cabd | 1712 | const Sized_relobj<size, big_endian>* object) |
c9269dff | 1713 | : sym_(sym), addend_(0), object_(0) |
cf43a2fe AM |
1714 | { |
1715 | if (size != 32) | |
1716 | this->addend_ = reloc.get_r_addend(); | |
d1a8cabd AM |
1717 | else if (parameters->options().output_is_position_independent() |
1718 | && (elfcpp::elf_r_type<size>(reloc.get_r_info()) | |
1719 | == elfcpp::R_PPC_PLTREL24)) | |
cf43a2fe | 1720 | { |
d1a8cabd | 1721 | this->addend_ = reloc.get_r_addend(); |
cf43a2fe | 1722 | if (this->addend_ != 0) |
d1a8cabd | 1723 | this->object_ = object; |
cf43a2fe AM |
1724 | } |
1725 | } | |
1726 | ||
cf43a2fe AM |
1727 | bool operator==(const Glink_sym_ent& that) const |
1728 | { | |
1729 | return (this->sym_ == that.sym_ | |
1730 | && this->object_ == that.object_ | |
d1a8cabd | 1731 | && this->addend_ == that.addend_); |
cf43a2fe | 1732 | } |
c9269dff AM |
1733 | |
1734 | const Symbol* sym_; | |
1735 | unsigned int addend_; | |
1736 | const Sized_relobj<size, big_endian>* object_; | |
cf43a2fe AM |
1737 | }; |
1738 | ||
d1a8cabd | 1739 | class Glink_sym_ent_hash |
cf43a2fe | 1740 | { |
d1a8cabd | 1741 | public: |
cf43a2fe AM |
1742 | size_t operator()(const Glink_sym_ent& ent) const |
1743 | { | |
1744 | return (reinterpret_cast<uintptr_t>(ent.sym_) | |
1745 | ^ reinterpret_cast<uintptr_t>(ent.object_) | |
cf43a2fe AM |
1746 | ^ ent.addend_); |
1747 | } | |
1748 | }; | |
1749 | ||
d1a8cabd | 1750 | // Map sym/object/addend to index. |
cf43a2fe AM |
1751 | typedef Unordered_map<Glink_sym_ent, unsigned int, |
1752 | Glink_sym_ent_hash> Glink_entries; | |
1753 | Glink_entries glink_entries_; | |
1754 | ||
1755 | // Offset of pltresolve stub (actually, branch table for 32-bit) | |
1756 | off_t pltresolve_; | |
1757 | ||
1758 | // Allows access to .got and .plt for do_write. | |
1759 | Target_powerpc<size, big_endian>* targ_; | |
1760 | }; | |
1761 | ||
1762 | // Create the glink section. | |
1763 | ||
1764 | template<int size, bool big_endian> | |
d83ce4e3 AM |
1765 | Output_data_glink<size, big_endian>::Output_data_glink( |
1766 | Target_powerpc<size, big_endian>* targ) | |
cf43a2fe AM |
1767 | : Output_section_data(16), |
1768 | pltresolve_(0), targ_(targ) | |
1769 | { | |
1770 | } | |
1771 | ||
1772 | // Add an entry to glink, if we do not already have one for this | |
d1a8cabd | 1773 | // sym/object/addend combo. |
cf43a2fe AM |
1774 | |
1775 | template<int size, bool big_endian> | |
1776 | void | |
d83ce4e3 AM |
1777 | Output_data_glink<size, big_endian>::add_entry( |
1778 | const Symbol* gsym, | |
1779 | const elfcpp::Rela<size, big_endian>& reloc, | |
d1a8cabd | 1780 | const Sized_relobj<size, big_endian>* object) |
cf43a2fe | 1781 | { |
d1a8cabd | 1782 | Glink_sym_ent ent(gsym, reloc, object); |
cf43a2fe | 1783 | unsigned int indx = this->glink_entries_.size(); |
d83ce4e3 | 1784 | this->glink_entries_.insert(std::make_pair(ent, indx)); |
cf43a2fe AM |
1785 | } |
1786 | ||
1787 | template<int size, bool big_endian> | |
1788 | unsigned int | |
d83ce4e3 AM |
1789 | Output_data_glink<size, big_endian>::find_entry( |
1790 | const Symbol* gsym, | |
1791 | const elfcpp::Rela<size, big_endian>& reloc, | |
d1a8cabd | 1792 | const Sized_relobj<size, big_endian>* object) const |
cf43a2fe | 1793 | { |
d1a8cabd | 1794 | Glink_sym_ent ent(gsym, reloc, object); |
cf43a2fe AM |
1795 | typename Glink_entries::const_iterator p = this->glink_entries_.find(ent); |
1796 | gold_assert(p != this->glink_entries_.end()); | |
1797 | return p->second; | |
1798 | } | |
1799 | ||
1800 | template<int size, bool big_endian> | |
1801 | void | |
1802 | Output_data_glink<size, big_endian>::set_final_data_size() | |
1803 | { | |
1804 | unsigned int count = this->glink_entries_.size(); | |
1805 | off_t total = count; | |
1806 | ||
1807 | if (count != 0) | |
1808 | { | |
1809 | if (size == 32) | |
1810 | { | |
1811 | total *= 16; | |
1812 | this->pltresolve_ = total; | |
1813 | ||
1814 | // space for branch table | |
1815 | total += 4 * (count - 1); | |
1816 | ||
1817 | total += -total & 15; | |
1818 | total += this->pltresolve_size; | |
1819 | } | |
1820 | else | |
1821 | { | |
1822 | total *= 32; | |
1823 | this->pltresolve_ = total; | |
1824 | total += this->pltresolve_size; | |
1825 | ||
1826 | // space for branch table | |
1827 | total += 8 * count; | |
1828 | if (count > 0x8000) | |
1829 | total += 4 * (count - 0x8000); | |
1830 | } | |
1831 | } | |
1832 | ||
1833 | this->set_data_size(total); | |
1834 | } | |
1835 | ||
1836 | static inline uint32_t | |
1837 | l(uint32_t a) | |
1838 | { | |
1839 | return a & 0xffff; | |
1840 | } | |
1841 | ||
1842 | static inline uint32_t | |
1843 | hi(uint32_t a) | |
1844 | { | |
1845 | return l(a >> 16); | |
1846 | } | |
1847 | ||
1848 | static inline uint32_t | |
1849 | ha(uint32_t a) | |
1850 | { | |
1851 | return hi(a + 0x8000); | |
1852 | } | |
1853 | ||
1854 | template<bool big_endian> | |
1855 | static inline void | |
c9269dff | 1856 | write_insn(unsigned char* p, uint32_t v) |
cf43a2fe AM |
1857 | { |
1858 | elfcpp::Swap<32, big_endian>::writeval(p, v); | |
1859 | } | |
1860 | ||
1861 | // Write out .glink. | |
1862 | ||
1863 | template<int size, bool big_endian> | |
1864 | void | |
1865 | Output_data_glink<size, big_endian>::do_write(Output_file* of) | |
1866 | { | |
1867 | const off_t off = this->offset(); | |
42cacb20 DE |
1868 | const section_size_type oview_size = |
1869 | convert_to_section_size_type(this->data_size()); | |
cf43a2fe | 1870 | unsigned char* const oview = of->get_output_view(off, oview_size); |
c9269dff | 1871 | unsigned char* p; |
42cacb20 | 1872 | |
cf43a2fe | 1873 | // The base address of the .plt section. |
dd93cd0a AM |
1874 | typedef typename elfcpp::Elf_types<size>::Elf_Addr Address; |
1875 | Address plt_base = this->targ_->plt_section()->address(); | |
cf43a2fe | 1876 | |
dd93cd0a AM |
1877 | const Output_data_got_powerpc<size, big_endian>* got |
1878 | = this->targ_->got_section(); | |
cf43a2fe AM |
1879 | |
1880 | if (size == 64) | |
1881 | { | |
dd93cd0a | 1882 | Address got_os_addr = got->output_section()->address(); |
c9269dff | 1883 | |
cf43a2fe AM |
1884 | // Write out call stubs. |
1885 | typename Glink_entries::const_iterator g; | |
1886 | for (g = this->glink_entries_.begin(); | |
1887 | g != this->glink_entries_.end(); | |
1888 | ++g) | |
1889 | { | |
dd93cd0a AM |
1890 | Address plt_addr = plt_base + g->first.sym_->plt_offset(); |
1891 | const Powerpc_relobj<size, big_endian>* ppcobj = static_cast | |
1892 | <const Powerpc_relobj<size, big_endian>*>(g->first.object_); | |
1893 | Address got_addr = got_os_addr + ppcobj->toc_base_offset(); | |
1894 | Address pltoff = plt_addr - got_addr; | |
cf43a2fe AM |
1895 | |
1896 | if (pltoff + 0x80008000 > 0xffffffff || (pltoff & 7) != 0) | |
1897 | gold_error(_("%s: linkage table error against `%s'"), | |
1898 | g->first.object_->name().c_str(), | |
1899 | g->first.sym_->demangled_name().c_str()); | |
1900 | ||
1901 | p = oview + g->second * this->glink_entry_size(); | |
1902 | if (ha(pltoff) != 0) | |
1903 | { | |
1904 | write_insn<big_endian>(p, addis_12_2 + ha(pltoff)), p += 4; | |
1905 | write_insn<big_endian>(p, std_2_1 + 40), p += 4; | |
1906 | write_insn<big_endian>(p, ld_11_12 + l(pltoff)), p += 4; | |
1907 | if (ha(pltoff + 16) != ha(pltoff)) | |
1908 | { | |
1909 | write_insn<big_endian>(p, addi_12_12 + l(pltoff)), p += 4; | |
1910 | pltoff = 0; | |
1911 | } | |
1912 | write_insn<big_endian>(p, mtctr_11), p += 4; | |
1913 | write_insn<big_endian>(p, ld_2_12 + l(pltoff + 8)), p += 4; | |
1914 | write_insn<big_endian>(p, ld_11_12 + l(pltoff + 16)), p += 4; | |
1915 | write_insn<big_endian>(p, bctr), p += 4; | |
1916 | } | |
1917 | else | |
1918 | { | |
1919 | write_insn<big_endian>(p, std_2_1 + 40), p += 4; | |
1920 | write_insn<big_endian>(p, ld_11_2 + l(pltoff)), p += 4; | |
1921 | if (ha(pltoff + 16) != ha(pltoff)) | |
1922 | { | |
1923 | write_insn<big_endian>(p, addi_2_2 + l(pltoff)), p += 4; | |
1924 | pltoff = 0; | |
1925 | } | |
1926 | write_insn<big_endian>(p, mtctr_11), p += 4; | |
1927 | write_insn<big_endian>(p, ld_11_2 + l(pltoff + 16)), p += 4; | |
1928 | write_insn<big_endian>(p, ld_2_2 + l(pltoff + 8)), p += 4; | |
1929 | write_insn<big_endian>(p, bctr), p += 4; | |
1930 | } | |
1931 | } | |
1932 | ||
1933 | // Write pltresolve stub. | |
1934 | p = oview + this->pltresolve_; | |
dd93cd0a AM |
1935 | Address after_bcl = this->address() + this->pltresolve_ + 16; |
1936 | Address pltoff = plt_base - after_bcl; | |
cf43a2fe AM |
1937 | |
1938 | elfcpp::Swap<64, big_endian>::writeval(p, pltoff), p += 8; | |
1939 | ||
1940 | write_insn<big_endian>(p, mflr_12), p += 4; | |
1941 | write_insn<big_endian>(p, bcl_20_31), p += 4; | |
1942 | write_insn<big_endian>(p, mflr_11), p += 4; | |
1943 | write_insn<big_endian>(p, ld_2_11 + l(-16)), p += 4; | |
1944 | write_insn<big_endian>(p, mtlr_12), p += 4; | |
1945 | write_insn<big_endian>(p, add_12_2_11), p += 4; | |
1946 | write_insn<big_endian>(p, ld_11_12 + 0), p += 4; | |
1947 | write_insn<big_endian>(p, ld_2_12 + 8), p += 4; | |
1948 | write_insn<big_endian>(p, mtctr_11), p += 4; | |
1949 | write_insn<big_endian>(p, ld_11_12 + 16), p += 4; | |
1950 | write_insn<big_endian>(p, bctr), p += 4; | |
1951 | while (p < oview + this->pltresolve_ + this->pltresolve_size) | |
1952 | write_insn<big_endian>(p, nop), p += 4; | |
1953 | ||
1954 | // Write lazy link call stubs. | |
1955 | uint32_t indx = 0; | |
1956 | while (p < oview + oview_size) | |
1957 | { | |
1958 | if (indx < 0x8000) | |
1959 | { | |
1960 | write_insn<big_endian>(p, li_0_0 + indx), p += 4; | |
1961 | } | |
1962 | else | |
1963 | { | |
1964 | write_insn<big_endian>(p, lis_0_0 + hi(indx)), p += 4; | |
1965 | write_insn<big_endian>(p, ori_0_0_0 + l(indx)), p += 4; | |
1966 | } | |
c9269dff | 1967 | uint32_t branch_off = this->pltresolve_ + 8 - (p - oview); |
cf43a2fe AM |
1968 | write_insn<big_endian>(p, b + (branch_off & 0x3fffffc)), p += 4; |
1969 | indx++; | |
1970 | } | |
1971 | } | |
1972 | else | |
1973 | { | |
dd93cd0a AM |
1974 | // The address of _GLOBAL_OFFSET_TABLE_. |
1975 | Address g_o_t = got->address() + got->g_o_t(); | |
c9269dff | 1976 | |
cf43a2fe AM |
1977 | // Write out call stubs. |
1978 | typename Glink_entries::const_iterator g; | |
1979 | for (g = this->glink_entries_.begin(); | |
1980 | g != this->glink_entries_.end(); | |
1981 | ++g) | |
1982 | { | |
dd93cd0a AM |
1983 | Address plt_addr = plt_base + g->first.sym_->plt_offset(); |
1984 | Address got_addr; | |
1985 | const Address invalid_address = static_cast<Address>(-1); | |
cf43a2fe AM |
1986 | |
1987 | p = oview + g->second * this->glink_entry_size(); | |
1988 | if (parameters->options().output_is_position_independent()) | |
1989 | { | |
d1a8cabd AM |
1990 | const Powerpc_relobj<size, big_endian>* object = static_cast |
1991 | <const Powerpc_relobj<size, big_endian>*>(g->first.object_); | |
1992 | if (object != NULL) | |
1993 | { | |
1994 | unsigned int got2 = object->got2_shndx(); | |
c9269dff AM |
1995 | got_addr = g->first.object_->get_output_section_offset(got2); |
1996 | gold_assert(got_addr != invalid_address); | |
1997 | got_addr += (g->first.object_->output_section(got2)->address() | |
1998 | + g->first.addend_); | |
d1a8cabd | 1999 | } |
cf43a2fe AM |
2000 | else |
2001 | got_addr = g_o_t; | |
2002 | ||
dd93cd0a | 2003 | Address pltoff = plt_addr - got_addr; |
cf43a2fe AM |
2004 | if (ha(pltoff) == 0) |
2005 | { | |
2006 | write_insn<big_endian>(p + 0, lwz_11_30 + l(pltoff)); | |
2007 | write_insn<big_endian>(p + 4, mtctr_11); | |
2008 | write_insn<big_endian>(p + 8, bctr); | |
2009 | } | |
2010 | else | |
2011 | { | |
2012 | write_insn<big_endian>(p + 0, addis_11_30 + ha(pltoff)); | |
2013 | write_insn<big_endian>(p + 4, lwz_11_11 + l(pltoff)); | |
2014 | write_insn<big_endian>(p + 8, mtctr_11); | |
2015 | write_insn<big_endian>(p + 12, bctr); | |
2016 | } | |
2017 | } | |
2018 | else | |
2019 | { | |
2020 | write_insn<big_endian>(p + 0, lis_11 + ha(plt_addr)); | |
2021 | write_insn<big_endian>(p + 4, lwz_11_11 + l(plt_addr)); | |
2022 | write_insn<big_endian>(p + 8, mtctr_11); | |
2023 | write_insn<big_endian>(p + 12, bctr); | |
2024 | } | |
2025 | } | |
42cacb20 | 2026 | |
cf43a2fe AM |
2027 | // Write out pltresolve branch table. |
2028 | p = oview + this->pltresolve_; | |
2029 | unsigned int the_end = oview_size - this->pltresolve_size; | |
c9269dff | 2030 | unsigned char* end_p = oview + the_end; |
cf43a2fe AM |
2031 | while (p < end_p - 8 * 4) |
2032 | write_insn<big_endian>(p, b + end_p - p), p += 4; | |
2033 | while (p < end_p) | |
2034 | write_insn<big_endian>(p, nop), p += 4; | |
42cacb20 | 2035 | |
cf43a2fe AM |
2036 | // Write out pltresolve call stub. |
2037 | if (parameters->options().output_is_position_independent()) | |
42cacb20 | 2038 | { |
dd93cd0a AM |
2039 | Address res0_off = this->pltresolve_; |
2040 | Address after_bcl_off = the_end + 12; | |
2041 | Address bcl_res0 = after_bcl_off - res0_off; | |
cf43a2fe AM |
2042 | |
2043 | write_insn<big_endian>(p + 0, addis_11_11 + ha(bcl_res0)); | |
2044 | write_insn<big_endian>(p + 4, mflr_0); | |
2045 | write_insn<big_endian>(p + 8, bcl_20_31); | |
2046 | write_insn<big_endian>(p + 12, addi_11_11 + l(bcl_res0)); | |
2047 | write_insn<big_endian>(p + 16, mflr_12); | |
2048 | write_insn<big_endian>(p + 20, mtlr_0); | |
2049 | write_insn<big_endian>(p + 24, sub_11_11_12); | |
2050 | ||
dd93cd0a | 2051 | Address got_bcl = g_o_t + 4 - (after_bcl_off + this->address()); |
cf43a2fe AM |
2052 | |
2053 | write_insn<big_endian>(p + 28, addis_12_12 + ha(got_bcl)); | |
2054 | if (ha(got_bcl) == ha(got_bcl + 4)) | |
2055 | { | |
2056 | write_insn<big_endian>(p + 32, lwz_0_12 + l(got_bcl)); | |
2057 | write_insn<big_endian>(p + 36, lwz_12_12 + l(got_bcl + 4)); | |
2058 | } | |
2059 | else | |
2060 | { | |
2061 | write_insn<big_endian>(p + 32, lwzu_0_12 + l(got_bcl)); | |
2062 | write_insn<big_endian>(p + 36, lwz_12_12 + 4); | |
2063 | } | |
2064 | write_insn<big_endian>(p + 40, mtctr_0); | |
2065 | write_insn<big_endian>(p + 44, add_0_11_11); | |
2066 | write_insn<big_endian>(p + 48, add_11_0_11); | |
2067 | write_insn<big_endian>(p + 52, bctr); | |
2068 | write_insn<big_endian>(p + 56, nop); | |
2069 | write_insn<big_endian>(p + 60, nop); | |
42cacb20 | 2070 | } |
cf43a2fe | 2071 | else |
42cacb20 | 2072 | { |
dd93cd0a | 2073 | Address res0 = this->pltresolve_ + this->address(); |
cf43a2fe AM |
2074 | |
2075 | write_insn<big_endian>(p + 0, lis_12 + ha(g_o_t + 4)); | |
2076 | write_insn<big_endian>(p + 4, addis_11_11 + ha(-res0)); | |
2077 | if (ha(g_o_t + 4) == ha(g_o_t + 8)) | |
2078 | write_insn<big_endian>(p + 8, lwz_0_12 + l(g_o_t + 4)); | |
2079 | else | |
2080 | write_insn<big_endian>(p + 8, lwzu_0_12 + l(g_o_t + 4)); | |
2081 | write_insn<big_endian>(p + 12, addi_11_11 + l(-res0)); | |
2082 | write_insn<big_endian>(p + 16, mtctr_0); | |
2083 | write_insn<big_endian>(p + 20, add_0_11_11); | |
2084 | if (ha(g_o_t + 4) == ha(g_o_t + 8)) | |
2085 | write_insn<big_endian>(p + 24, lwz_12_12 + l(g_o_t + 8)); | |
2086 | else | |
2087 | write_insn<big_endian>(p + 24, lwz_12_12 + 4); | |
2088 | write_insn<big_endian>(p + 28, add_11_0_11); | |
2089 | write_insn<big_endian>(p + 32, bctr); | |
2090 | write_insn<big_endian>(p + 36, nop); | |
2091 | write_insn<big_endian>(p + 40, nop); | |
2092 | write_insn<big_endian>(p + 44, nop); | |
2093 | write_insn<big_endian>(p + 48, nop); | |
2094 | write_insn<big_endian>(p + 52, nop); | |
2095 | write_insn<big_endian>(p + 56, nop); | |
2096 | write_insn<big_endian>(p + 60, nop); | |
42cacb20 | 2097 | } |
cf43a2fe | 2098 | p += 64; |
42cacb20 DE |
2099 | } |
2100 | ||
cf43a2fe AM |
2101 | of->write_output_view(off, oview_size, oview); |
2102 | } | |
2103 | ||
2104 | // Create the glink section. | |
42cacb20 | 2105 | |
cf43a2fe AM |
2106 | template<int size, bool big_endian> |
2107 | void | |
2108 | Target_powerpc<size, big_endian>::make_glink_section(Layout* layout) | |
2109 | { | |
2110 | if (this->glink_ == NULL) | |
2111 | { | |
2112 | this->glink_ = new Output_data_glink<size, big_endian>(this); | |
2113 | layout->add_output_section_data(".text", elfcpp::SHT_PROGBITS, | |
2114 | elfcpp::SHF_ALLOC | elfcpp::SHF_EXECINSTR, | |
2115 | this->glink_, ORDER_TEXT, false); | |
2116 | } | |
42cacb20 DE |
2117 | } |
2118 | ||
2119 | // Create a PLT entry for a global symbol. | |
2120 | ||
2121 | template<int size, bool big_endian> | |
2122 | void | |
d83ce4e3 AM |
2123 | Target_powerpc<size, big_endian>::make_plt_entry( |
2124 | Layout* layout, | |
2125 | Symbol* gsym, | |
2126 | const elfcpp::Rela<size, big_endian>& reloc, | |
2127 | const Sized_relobj<size, big_endian>* object) | |
42cacb20 | 2128 | { |
42cacb20 | 2129 | if (this->plt_ == NULL) |
cf43a2fe | 2130 | this->make_plt_section(layout); |
42cacb20 | 2131 | |
cf43a2fe | 2132 | this->plt_->add_entry(gsym); |
612a8d3d | 2133 | |
d1a8cabd | 2134 | this->glink_->add_entry(gsym, reloc, object); |
42cacb20 DE |
2135 | } |
2136 | ||
0e70b911 CC |
2137 | // Return the number of entries in the PLT. |
2138 | ||
2139 | template<int size, bool big_endian> | |
2140 | unsigned int | |
2141 | Target_powerpc<size, big_endian>::plt_entry_count() const | |
2142 | { | |
2143 | if (this->plt_ == NULL) | |
2144 | return 0; | |
2145 | return this->plt_->entry_count(); | |
2146 | } | |
2147 | ||
2148 | // Return the offset of the first non-reserved PLT entry. | |
2149 | ||
2150 | template<int size, bool big_endian> | |
2151 | unsigned int | |
2152 | Target_powerpc<size, big_endian>::first_plt_entry_offset() const | |
2153 | { | |
2154 | return Output_data_plt_powerpc<size, big_endian>::first_plt_entry_offset(); | |
2155 | } | |
2156 | ||
2157 | // Return the size of each PLT entry. | |
2158 | ||
2159 | template<int size, bool big_endian> | |
2160 | unsigned int | |
2161 | Target_powerpc<size, big_endian>::plt_entry_size() const | |
2162 | { | |
2163 | return Output_data_plt_powerpc<size, big_endian>::get_plt_entry_size(); | |
2164 | } | |
2165 | ||
dd93cd0a | 2166 | // Create a GOT entry for local dynamic __tls_get_addr calls. |
42cacb20 DE |
2167 | |
2168 | template<int size, bool big_endian> | |
2169 | unsigned int | |
dd93cd0a | 2170 | Target_powerpc<size, big_endian>::tlsld_got_offset( |
6fa2a40b CC |
2171 | Symbol_table* symtab, |
2172 | Layout* layout, | |
2173 | Sized_relobj_file<size, big_endian>* object) | |
42cacb20 | 2174 | { |
dd93cd0a | 2175 | if (this->tlsld_got_offset_ == -1U) |
42cacb20 DE |
2176 | { |
2177 | gold_assert(symtab != NULL && layout != NULL && object != NULL); | |
2178 | Reloc_section* rela_dyn = this->rela_dyn_section(layout); | |
dd93cd0a AM |
2179 | Output_data_got_powerpc<size, big_endian>* got |
2180 | = this->got_section(symtab, layout); | |
2181 | unsigned int got_offset = got->add_constant_pair(0, 0); | |
42cacb20 DE |
2182 | rela_dyn->add_local(object, 0, elfcpp::R_POWERPC_DTPMOD, got, |
2183 | got_offset, 0); | |
dd93cd0a | 2184 | this->tlsld_got_offset_ = got_offset; |
42cacb20 | 2185 | } |
dd93cd0a | 2186 | return this->tlsld_got_offset_; |
42cacb20 DE |
2187 | } |
2188 | ||
95a2c8d6 RS |
2189 | // Get the Reference_flags for a particular relocation. |
2190 | ||
2191 | template<int size, bool big_endian> | |
2192 | int | |
d83ce4e3 | 2193 | Target_powerpc<size, big_endian>::Scan::get_reference_flags(unsigned int r_type) |
95a2c8d6 RS |
2194 | { |
2195 | switch (r_type) | |
2196 | { | |
2197 | case elfcpp::R_POWERPC_NONE: | |
2198 | case elfcpp::R_POWERPC_GNU_VTINHERIT: | |
2199 | case elfcpp::R_POWERPC_GNU_VTENTRY: | |
2200 | case elfcpp::R_PPC64_TOC: | |
2201 | // No symbol reference. | |
2202 | return 0; | |
2203 | ||
dd93cd0a AM |
2204 | case elfcpp::R_PPC64_ADDR64: |
2205 | case elfcpp::R_PPC64_UADDR64: | |
2206 | case elfcpp::R_POWERPC_ADDR32: | |
2207 | case elfcpp::R_POWERPC_UADDR32: | |
95a2c8d6 | 2208 | case elfcpp::R_POWERPC_ADDR16: |
dd93cd0a | 2209 | case elfcpp::R_POWERPC_UADDR16: |
95a2c8d6 RS |
2210 | case elfcpp::R_POWERPC_ADDR16_LO: |
2211 | case elfcpp::R_POWERPC_ADDR16_HI: | |
2212 | case elfcpp::R_POWERPC_ADDR16_HA: | |
95a2c8d6 RS |
2213 | return Symbol::ABSOLUTE_REF; |
2214 | ||
dd93cd0a AM |
2215 | case elfcpp::R_POWERPC_ADDR24: |
2216 | case elfcpp::R_POWERPC_ADDR14: | |
2217 | case elfcpp::R_POWERPC_ADDR14_BRTAKEN: | |
2218 | case elfcpp::R_POWERPC_ADDR14_BRNTAKEN: | |
2219 | return Symbol::FUNCTION_CALL | Symbol::ABSOLUTE_REF; | |
2220 | ||
2221 | case elfcpp::R_POWERPC_REL32: | |
95a2c8d6 | 2222 | case elfcpp::R_PPC_LOCAL24PC: |
6ce78956 AM |
2223 | case elfcpp::R_POWERPC_REL16: |
2224 | case elfcpp::R_POWERPC_REL16_LO: | |
2225 | case elfcpp::R_POWERPC_REL16_HI: | |
2226 | case elfcpp::R_POWERPC_REL16_HA: | |
95a2c8d6 RS |
2227 | return Symbol::RELATIVE_REF; |
2228 | ||
dd93cd0a | 2229 | case elfcpp::R_POWERPC_REL24: |
95a2c8d6 | 2230 | case elfcpp::R_PPC_PLTREL24: |
dd93cd0a AM |
2231 | case elfcpp::R_POWERPC_REL14: |
2232 | case elfcpp::R_POWERPC_REL14_BRTAKEN: | |
2233 | case elfcpp::R_POWERPC_REL14_BRNTAKEN: | |
95a2c8d6 RS |
2234 | return Symbol::FUNCTION_CALL | Symbol::RELATIVE_REF; |
2235 | ||
2236 | case elfcpp::R_POWERPC_GOT16: | |
2237 | case elfcpp::R_POWERPC_GOT16_LO: | |
2238 | case elfcpp::R_POWERPC_GOT16_HI: | |
2239 | case elfcpp::R_POWERPC_GOT16_HA: | |
2240 | case elfcpp::R_PPC64_TOC16: | |
2241 | case elfcpp::R_PPC64_TOC16_LO: | |
2242 | case elfcpp::R_PPC64_TOC16_HI: | |
2243 | case elfcpp::R_PPC64_TOC16_HA: | |
2244 | case elfcpp::R_PPC64_TOC16_DS: | |
2245 | case elfcpp::R_PPC64_TOC16_LO_DS: | |
2246 | // Absolute in GOT. | |
2247 | return Symbol::ABSOLUTE_REF; | |
2248 | ||
2249 | case elfcpp::R_POWERPC_GOT_TPREL16: | |
2250 | case elfcpp::R_POWERPC_TLS: | |
2251 | return Symbol::TLS_REF; | |
2252 | ||
2253 | case elfcpp::R_POWERPC_COPY: | |
2254 | case elfcpp::R_POWERPC_GLOB_DAT: | |
2255 | case elfcpp::R_POWERPC_JMP_SLOT: | |
2256 | case elfcpp::R_POWERPC_RELATIVE: | |
2257 | case elfcpp::R_POWERPC_DTPMOD: | |
2258 | default: | |
2259 | // Not expected. We will give an error later. | |
2260 | return 0; | |
2261 | } | |
2262 | } | |
2263 | ||
42cacb20 DE |
2264 | // Report an unsupported relocation against a local symbol. |
2265 | ||
2266 | template<int size, bool big_endian> | |
2267 | void | |
2268 | Target_powerpc<size, big_endian>::Scan::unsupported_reloc_local( | |
d83ce4e3 AM |
2269 | Sized_relobj_file<size, big_endian>* object, |
2270 | unsigned int r_type) | |
42cacb20 DE |
2271 | { |
2272 | gold_error(_("%s: unsupported reloc %u against local symbol"), | |
2273 | object->name().c_str(), r_type); | |
2274 | } | |
2275 | ||
2276 | // We are about to emit a dynamic relocation of type R_TYPE. If the | |
2277 | // dynamic linker does not support it, issue an error. | |
2278 | ||
2279 | template<int size, bool big_endian> | |
2280 | void | |
2281 | Target_powerpc<size, big_endian>::Scan::check_non_pic(Relobj* object, | |
2282 | unsigned int r_type) | |
2283 | { | |
2284 | gold_assert(r_type != elfcpp::R_POWERPC_NONE); | |
2285 | ||
2286 | // These are the relocation types supported by glibc for both 32-bit | |
2287 | // and 64-bit powerpc. | |
2288 | switch (r_type) | |
2289 | { | |
3ea0a085 | 2290 | case elfcpp::R_POWERPC_NONE: |
42cacb20 DE |
2291 | case elfcpp::R_POWERPC_RELATIVE: |
2292 | case elfcpp::R_POWERPC_GLOB_DAT: | |
2293 | case elfcpp::R_POWERPC_DTPMOD: | |
2294 | case elfcpp::R_POWERPC_DTPREL: | |
2295 | case elfcpp::R_POWERPC_TPREL: | |
2296 | case elfcpp::R_POWERPC_JMP_SLOT: | |
2297 | case elfcpp::R_POWERPC_COPY: | |
3ea0a085 | 2298 | case elfcpp::R_POWERPC_IRELATIVE: |
42cacb20 | 2299 | case elfcpp::R_POWERPC_ADDR32: |
3ea0a085 | 2300 | case elfcpp::R_POWERPC_UADDR32: |
42cacb20 | 2301 | case elfcpp::R_POWERPC_ADDR24: |
3ea0a085 AM |
2302 | case elfcpp::R_POWERPC_ADDR16: |
2303 | case elfcpp::R_POWERPC_UADDR16: | |
2304 | case elfcpp::R_POWERPC_ADDR16_LO: | |
2305 | case elfcpp::R_POWERPC_ADDR16_HI: | |
2306 | case elfcpp::R_POWERPC_ADDR16_HA: | |
2307 | case elfcpp::R_POWERPC_ADDR14: | |
2308 | case elfcpp::R_POWERPC_ADDR14_BRTAKEN: | |
2309 | case elfcpp::R_POWERPC_ADDR14_BRNTAKEN: | |
2310 | case elfcpp::R_POWERPC_REL32: | |
42cacb20 | 2311 | case elfcpp::R_POWERPC_REL24: |
3ea0a085 AM |
2312 | case elfcpp::R_POWERPC_TPREL16: |
2313 | case elfcpp::R_POWERPC_TPREL16_LO: | |
2314 | case elfcpp::R_POWERPC_TPREL16_HI: | |
2315 | case elfcpp::R_POWERPC_TPREL16_HA: | |
42cacb20 DE |
2316 | return; |
2317 | ||
2318 | default: | |
2319 | break; | |
2320 | } | |
2321 | ||
2322 | if (size == 64) | |
2323 | { | |
2324 | switch (r_type) | |
2325 | { | |
2326 | // These are the relocation types supported only on 64-bit. | |
2327 | case elfcpp::R_PPC64_ADDR64: | |
42cacb20 | 2328 | case elfcpp::R_PPC64_UADDR64: |
3ea0a085 | 2329 | case elfcpp::R_PPC64_JMP_IREL: |
42cacb20 | 2330 | case elfcpp::R_PPC64_ADDR16_DS: |
3ea0a085 | 2331 | case elfcpp::R_PPC64_ADDR16_LO_DS: |
42cacb20 DE |
2332 | case elfcpp::R_PPC64_ADDR16_HIGHER: |
2333 | case elfcpp::R_PPC64_ADDR16_HIGHEST: | |
2334 | case elfcpp::R_PPC64_ADDR16_HIGHERA: | |
2335 | case elfcpp::R_PPC64_ADDR16_HIGHESTA: | |
42cacb20 | 2336 | case elfcpp::R_PPC64_REL64: |
3ea0a085 AM |
2337 | case elfcpp::R_POWERPC_ADDR30: |
2338 | case elfcpp::R_PPC64_TPREL16_DS: | |
2339 | case elfcpp::R_PPC64_TPREL16_LO_DS: | |
2340 | case elfcpp::R_PPC64_TPREL16_HIGHER: | |
2341 | case elfcpp::R_PPC64_TPREL16_HIGHEST: | |
2342 | case elfcpp::R_PPC64_TPREL16_HIGHERA: | |
2343 | case elfcpp::R_PPC64_TPREL16_HIGHESTA: | |
42cacb20 DE |
2344 | return; |
2345 | ||
2346 | default: | |
2347 | break; | |
2348 | } | |
2349 | } | |
2350 | else | |
2351 | { | |
2352 | switch (r_type) | |
2353 | { | |
2354 | // These are the relocation types supported only on 32-bit. | |
3ea0a085 AM |
2355 | // ??? glibc ld.so doesn't need to support these. |
2356 | case elfcpp::R_POWERPC_DTPREL16: | |
2357 | case elfcpp::R_POWERPC_DTPREL16_LO: | |
2358 | case elfcpp::R_POWERPC_DTPREL16_HI: | |
2359 | case elfcpp::R_POWERPC_DTPREL16_HA: | |
2360 | return; | |
42cacb20 DE |
2361 | |
2362 | default: | |
2363 | break; | |
2364 | } | |
2365 | } | |
2366 | ||
2367 | // This prevents us from issuing more than one error per reloc | |
2368 | // section. But we can still wind up issuing more than one | |
2369 | // error per object file. | |
2370 | if (this->issued_non_pic_error_) | |
2371 | return; | |
33aea2fd | 2372 | gold_assert(parameters->options().output_is_position_independent()); |
42cacb20 DE |
2373 | object->error(_("requires unsupported dynamic reloc; " |
2374 | "recompile with -fPIC")); | |
2375 | this->issued_non_pic_error_ = true; | |
2376 | return; | |
2377 | } | |
2378 | ||
2379 | // Scan a relocation for a local symbol. | |
2380 | ||
2381 | template<int size, bool big_endian> | |
2382 | inline void | |
2383 | Target_powerpc<size, big_endian>::Scan::local( | |
d83ce4e3 AM |
2384 | Symbol_table* symtab, |
2385 | Layout* layout, | |
2386 | Target_powerpc<size, big_endian>* target, | |
2387 | Sized_relobj_file<size, big_endian>* object, | |
2388 | unsigned int data_shndx, | |
2389 | Output_section* output_section, | |
2390 | const elfcpp::Rela<size, big_endian>& reloc, | |
2391 | unsigned int r_type, | |
bfdfa4cd AM |
2392 | const elfcpp::Sym<size, big_endian>& /* lsym */, |
2393 | bool is_discarded) | |
42cacb20 | 2394 | { |
dd93cd0a AM |
2395 | Powerpc_relobj<size, big_endian>* ppc_object |
2396 | = static_cast<Powerpc_relobj<size, big_endian>*>(object); | |
2397 | ||
bfdfa4cd AM |
2398 | if (is_discarded) |
2399 | { | |
2400 | if (size == 64 | |
2401 | && data_shndx == ppc_object->opd_shndx() | |
2402 | && r_type == elfcpp::R_PPC64_ADDR64) | |
2403 | ppc_object->set_opd_discard(reloc.get_r_offset()); | |
2404 | return; | |
2405 | } | |
2406 | ||
42cacb20 DE |
2407 | switch (r_type) |
2408 | { | |
2409 | case elfcpp::R_POWERPC_NONE: | |
2410 | case elfcpp::R_POWERPC_GNU_VTINHERIT: | |
2411 | case elfcpp::R_POWERPC_GNU_VTENTRY: | |
6ce78956 | 2412 | case elfcpp::R_PPC64_TOCSAVE: |
dd93cd0a | 2413 | case elfcpp::R_PPC_EMB_MRKREF: |
7404fe1b | 2414 | case elfcpp::R_POWERPC_TLS: |
dd93cd0a AM |
2415 | break; |
2416 | ||
2417 | case elfcpp::R_PPC64_TOC: | |
2418 | { | |
2419 | Output_data_got_powerpc<size, big_endian>* got | |
2420 | = target->got_section(symtab, layout); | |
2421 | if (parameters->options().output_is_position_independent()) | |
2422 | { | |
bfdfa4cd AM |
2423 | Address off = reloc.get_r_offset(); |
2424 | if (size == 64 | |
2425 | && data_shndx == ppc_object->opd_shndx() | |
2426 | && ppc_object->get_opd_discard(off - 8)) | |
2427 | break; | |
2428 | ||
dd93cd0a | 2429 | Reloc_section* rela_dyn = target->rela_dyn_section(layout); |
bfdfa4cd | 2430 | Powerpc_relobj<size, big_endian>* symobj = ppc_object; |
dd93cd0a AM |
2431 | rela_dyn->add_output_section_relative(got->output_section(), |
2432 | elfcpp::R_POWERPC_RELATIVE, | |
2433 | output_section, | |
bfdfa4cd AM |
2434 | object, data_shndx, off, |
2435 | symobj->toc_base_offset()); | |
dd93cd0a AM |
2436 | } |
2437 | } | |
42cacb20 DE |
2438 | break; |
2439 | ||
2440 | case elfcpp::R_PPC64_ADDR64: | |
dd93cd0a | 2441 | case elfcpp::R_PPC64_UADDR64: |
42cacb20 | 2442 | case elfcpp::R_POWERPC_ADDR32: |
dd93cd0a AM |
2443 | case elfcpp::R_POWERPC_UADDR32: |
2444 | case elfcpp::R_POWERPC_ADDR24: | |
c9269dff | 2445 | case elfcpp::R_POWERPC_ADDR16: |
42cacb20 | 2446 | case elfcpp::R_POWERPC_ADDR16_LO: |
c9269dff AM |
2447 | case elfcpp::R_POWERPC_ADDR16_HI: |
2448 | case elfcpp::R_POWERPC_ADDR16_HA: | |
dd93cd0a AM |
2449 | case elfcpp::R_POWERPC_UADDR16: |
2450 | case elfcpp::R_PPC64_ADDR16_HIGHER: | |
2451 | case elfcpp::R_PPC64_ADDR16_HIGHERA: | |
2452 | case elfcpp::R_PPC64_ADDR16_HIGHEST: | |
2453 | case elfcpp::R_PPC64_ADDR16_HIGHESTA: | |
2454 | case elfcpp::R_PPC64_ADDR16_DS: | |
2455 | case elfcpp::R_PPC64_ADDR16_LO_DS: | |
2456 | case elfcpp::R_POWERPC_ADDR14: | |
2457 | case elfcpp::R_POWERPC_ADDR14_BRTAKEN: | |
2458 | case elfcpp::R_POWERPC_ADDR14_BRNTAKEN: | |
42cacb20 DE |
2459 | // If building a shared library (or a position-independent |
2460 | // executable), we need to create a dynamic relocation for | |
2461 | // this location. | |
2462 | if (parameters->options().output_is_position_independent()) | |
2e702c99 RM |
2463 | { |
2464 | Reloc_section* rela_dyn = target->rela_dyn_section(layout); | |
42cacb20 | 2465 | |
dd93cd0a AM |
2466 | if ((size == 32 && r_type == elfcpp::R_POWERPC_ADDR32) |
2467 | || (size == 64 && r_type == elfcpp::R_PPC64_ADDR64)) | |
2e702c99 RM |
2468 | { |
2469 | unsigned int r_sym = elfcpp::elf_r_sym<size>(reloc.get_r_info()); | |
dd93cd0a AM |
2470 | rela_dyn->add_local_relative(object, r_sym, |
2471 | elfcpp::R_POWERPC_RELATIVE, | |
2472 | output_section, data_shndx, | |
2473 | reloc.get_r_offset(), | |
2474 | reloc.get_r_addend(), false); | |
2e702c99 RM |
2475 | } |
2476 | else | |
2477 | { | |
dd93cd0a | 2478 | check_non_pic(object, r_type); |
42cacb20 | 2479 | unsigned int r_sym = elfcpp::elf_r_sym<size>(reloc.get_r_info()); |
dd93cd0a AM |
2480 | rela_dyn->add_local(object, r_sym, r_type, output_section, |
2481 | data_shndx, reloc.get_r_offset(), | |
2482 | reloc.get_r_addend()); | |
2e702c99 RM |
2483 | } |
2484 | } | |
42cacb20 DE |
2485 | break; |
2486 | ||
3ea0a085 | 2487 | case elfcpp::R_PPC64_REL64: |
dd93cd0a | 2488 | case elfcpp::R_POWERPC_REL32: |
42cacb20 DE |
2489 | case elfcpp::R_POWERPC_REL24: |
2490 | case elfcpp::R_PPC_LOCAL24PC: | |
dd93cd0a | 2491 | case elfcpp::R_POWERPC_REL16: |
6ce78956 | 2492 | case elfcpp::R_POWERPC_REL16_LO: |
dd93cd0a | 2493 | case elfcpp::R_POWERPC_REL16_HI: |
6ce78956 | 2494 | case elfcpp::R_POWERPC_REL16_HA: |
dd93cd0a AM |
2495 | case elfcpp::R_POWERPC_REL14: |
2496 | case elfcpp::R_POWERPC_REL14_BRTAKEN: | |
2497 | case elfcpp::R_POWERPC_REL14_BRNTAKEN: | |
2498 | case elfcpp::R_POWERPC_SECTOFF: | |
2499 | case elfcpp::R_POWERPC_TPREL16: | |
2500 | case elfcpp::R_POWERPC_DTPREL16: | |
2501 | case elfcpp::R_POWERPC_SECTOFF_LO: | |
2502 | case elfcpp::R_POWERPC_TPREL16_LO: | |
2503 | case elfcpp::R_POWERPC_DTPREL16_LO: | |
2504 | case elfcpp::R_POWERPC_SECTOFF_HI: | |
2505 | case elfcpp::R_POWERPC_TPREL16_HI: | |
2506 | case elfcpp::R_POWERPC_DTPREL16_HI: | |
2507 | case elfcpp::R_POWERPC_SECTOFF_HA: | |
2508 | case elfcpp::R_POWERPC_TPREL16_HA: | |
2509 | case elfcpp::R_POWERPC_DTPREL16_HA: | |
2510 | case elfcpp::R_PPC64_DTPREL16_HIGHER: | |
2511 | case elfcpp::R_PPC64_TPREL16_HIGHER: | |
2512 | case elfcpp::R_PPC64_DTPREL16_HIGHERA: | |
2513 | case elfcpp::R_PPC64_TPREL16_HIGHERA: | |
2514 | case elfcpp::R_PPC64_DTPREL16_HIGHEST: | |
2515 | case elfcpp::R_PPC64_TPREL16_HIGHEST: | |
2516 | case elfcpp::R_PPC64_DTPREL16_HIGHESTA: | |
2517 | case elfcpp::R_PPC64_TPREL16_HIGHESTA: | |
2518 | case elfcpp::R_PPC64_TPREL16_DS: | |
2519 | case elfcpp::R_PPC64_TPREL16_LO_DS: | |
2520 | case elfcpp::R_PPC64_DTPREL16_DS: | |
2521 | case elfcpp::R_PPC64_DTPREL16_LO_DS: | |
2522 | case elfcpp::R_PPC64_SECTOFF_DS: | |
2523 | case elfcpp::R_PPC64_SECTOFF_LO_DS: | |
2524 | case elfcpp::R_PPC64_TLSGD: | |
2525 | case elfcpp::R_PPC64_TLSLD: | |
42cacb20 DE |
2526 | break; |
2527 | ||
2528 | case elfcpp::R_POWERPC_GOT16: | |
2529 | case elfcpp::R_POWERPC_GOT16_LO: | |
2530 | case elfcpp::R_POWERPC_GOT16_HI: | |
2531 | case elfcpp::R_POWERPC_GOT16_HA: | |
dd93cd0a AM |
2532 | case elfcpp::R_PPC64_GOT16_DS: |
2533 | case elfcpp::R_PPC64_GOT16_LO_DS: | |
42cacb20 | 2534 | { |
c9269dff | 2535 | // The symbol requires a GOT entry. |
dd93cd0a AM |
2536 | Output_data_got_powerpc<size, big_endian>* got |
2537 | = target->got_section(symtab, layout); | |
2538 | unsigned int r_sym = elfcpp::elf_r_sym<size>(reloc.get_r_info()); | |
42cacb20 DE |
2539 | |
2540 | // If we are generating a shared object, we need to add a | |
2541 | // dynamic relocation for this symbol's GOT entry. | |
2542 | if (parameters->options().output_is_position_independent()) | |
2543 | { | |
2544 | if (!object->local_has_got_offset(r_sym, GOT_TYPE_STANDARD)) | |
2545 | { | |
2546 | Reloc_section* rela_dyn = target->rela_dyn_section(layout); | |
2547 | unsigned int off; | |
2548 | ||
2549 | off = got->add_constant(0); | |
2550 | object->set_local_got_offset(r_sym, GOT_TYPE_STANDARD, off); | |
2551 | rela_dyn->add_local_relative(object, r_sym, | |
2552 | elfcpp::R_POWERPC_RELATIVE, | |
397b129b | 2553 | got, off, 0, false); |
42cacb20 | 2554 | } |
2e702c99 | 2555 | } |
42cacb20 DE |
2556 | else |
2557 | got->add_local(object, r_sym, GOT_TYPE_STANDARD); | |
2558 | } | |
2559 | break; | |
2560 | ||
cf43a2fe AM |
2561 | case elfcpp::R_PPC64_TOC16: |
2562 | case elfcpp::R_PPC64_TOC16_LO: | |
2563 | case elfcpp::R_PPC64_TOC16_HI: | |
2564 | case elfcpp::R_PPC64_TOC16_HA: | |
2565 | case elfcpp::R_PPC64_TOC16_DS: | |
2566 | case elfcpp::R_PPC64_TOC16_LO_DS: | |
42cacb20 DE |
2567 | // We need a GOT section. |
2568 | target->got_section(symtab, layout); | |
2569 | break; | |
2570 | ||
dd93cd0a AM |
2571 | case elfcpp::R_POWERPC_GOT_TLSGD16: |
2572 | case elfcpp::R_POWERPC_GOT_TLSGD16_LO: | |
2573 | case elfcpp::R_POWERPC_GOT_TLSGD16_HI: | |
2574 | case elfcpp::R_POWERPC_GOT_TLSGD16_HA: | |
2575 | { | |
2576 | const tls::Tls_optimization tls_type = target->optimize_tls_gd(true); | |
2577 | if (tls_type == tls::TLSOPT_NONE) | |
2578 | { | |
2579 | Output_data_got_powerpc<size, big_endian>* got | |
2580 | = target->got_section(symtab, layout); | |
2581 | unsigned int r_sym = elfcpp::elf_r_sym<size>(reloc.get_r_info()); | |
bd73a62d AM |
2582 | Reloc_section* rela_dyn = target->rela_dyn_section(layout); |
2583 | got->add_local_tls_pair(object, r_sym, GOT_TYPE_TLSGD, | |
2584 | rela_dyn, elfcpp::R_POWERPC_DTPMOD); | |
dd93cd0a AM |
2585 | } |
2586 | else if (tls_type == tls::TLSOPT_TO_LE) | |
2587 | { | |
2588 | // no GOT relocs needed for Local Exec. | |
2589 | } | |
2590 | else | |
2591 | gold_unreachable(); | |
2592 | } | |
42cacb20 DE |
2593 | break; |
2594 | ||
dd93cd0a AM |
2595 | case elfcpp::R_POWERPC_GOT_TLSLD16: |
2596 | case elfcpp::R_POWERPC_GOT_TLSLD16_LO: | |
2597 | case elfcpp::R_POWERPC_GOT_TLSLD16_HI: | |
2598 | case elfcpp::R_POWERPC_GOT_TLSLD16_HA: | |
2599 | { | |
2600 | const tls::Tls_optimization tls_type = target->optimize_tls_ld(); | |
2601 | if (tls_type == tls::TLSOPT_NONE) | |
2602 | target->tlsld_got_offset(symtab, layout, object); | |
2603 | else if (tls_type == tls::TLSOPT_TO_LE) | |
2604 | { | |
2605 | // no GOT relocs needed for Local Exec. | |
7404fe1b AM |
2606 | if (parameters->options().emit_relocs()) |
2607 | { | |
2608 | Output_section* os = layout->tls_segment()->first_section(); | |
2609 | gold_assert(os != NULL); | |
2610 | os->set_needs_symtab_index(); | |
2611 | } | |
dd93cd0a AM |
2612 | } |
2613 | else | |
2614 | gold_unreachable(); | |
2615 | } | |
42cacb20 | 2616 | break; |
42cacb20 | 2617 | |
dd93cd0a AM |
2618 | case elfcpp::R_POWERPC_GOT_DTPREL16: |
2619 | case elfcpp::R_POWERPC_GOT_DTPREL16_LO: | |
2620 | case elfcpp::R_POWERPC_GOT_DTPREL16_HI: | |
2621 | case elfcpp::R_POWERPC_GOT_DTPREL16_HA: | |
2622 | { | |
2623 | Output_data_got_powerpc<size, big_endian>* got | |
2624 | = target->got_section(symtab, layout); | |
2625 | unsigned int r_sym = elfcpp::elf_r_sym<size>(reloc.get_r_info()); | |
bd73a62d | 2626 | got->add_local_tls(object, r_sym, GOT_TYPE_DTPREL); |
dd93cd0a AM |
2627 | } |
2628 | break; | |
42cacb20 | 2629 | |
dd93cd0a AM |
2630 | case elfcpp::R_POWERPC_GOT_TPREL16: |
2631 | case elfcpp::R_POWERPC_GOT_TPREL16_LO: | |
2632 | case elfcpp::R_POWERPC_GOT_TPREL16_HI: | |
2633 | case elfcpp::R_POWERPC_GOT_TPREL16_HA: | |
2634 | { | |
2635 | const tls::Tls_optimization tls_type = target->optimize_tls_ie(true); | |
2636 | if (tls_type == tls::TLSOPT_NONE) | |
2637 | { | |
2638 | Output_data_got_powerpc<size, big_endian>* got | |
2639 | = target->got_section(symtab, layout); | |
2640 | unsigned int r_sym = elfcpp::elf_r_sym<size>(reloc.get_r_info()); | |
bd73a62d | 2641 | got->add_local_tls(object, r_sym, GOT_TYPE_TPREL); |
dd93cd0a AM |
2642 | } |
2643 | else if (tls_type == tls::TLSOPT_TO_LE) | |
2644 | { | |
2645 | // no GOT relocs needed for Local Exec. | |
2646 | } | |
2647 | else | |
2648 | gold_unreachable(); | |
2649 | } | |
2650 | break; | |
2651 | ||
2652 | default: | |
2653 | unsupported_reloc_local(object, r_type); | |
2654 | break; | |
2655 | } | |
2656 | } | |
2657 | ||
2658 | // Report an unsupported relocation against a global symbol. | |
2659 | ||
2660 | template<int size, bool big_endian> | |
2661 | void | |
2662 | Target_powerpc<size, big_endian>::Scan::unsupported_reloc_global( | |
2663 | Sized_relobj_file<size, big_endian>* object, | |
2664 | unsigned int r_type, | |
2665 | Symbol* gsym) | |
2666 | { | |
42cacb20 DE |
2667 | gold_error(_("%s: unsupported reloc %u against global symbol %s"), |
2668 | object->name().c_str(), r_type, gsym->demangled_name().c_str()); | |
2669 | } | |
2670 | ||
2671 | // Scan a relocation for a global symbol. | |
2672 | ||
2673 | template<int size, bool big_endian> | |
2674 | inline void | |
2675 | Target_powerpc<size, big_endian>::Scan::global( | |
d83ce4e3 AM |
2676 | Symbol_table* symtab, |
2677 | Layout* layout, | |
2678 | Target_powerpc<size, big_endian>* target, | |
2679 | Sized_relobj_file<size, big_endian>* object, | |
2680 | unsigned int data_shndx, | |
2681 | Output_section* output_section, | |
2682 | const elfcpp::Rela<size, big_endian>& reloc, | |
2683 | unsigned int r_type, | |
2684 | Symbol* gsym) | |
42cacb20 | 2685 | { |
dd93cd0a AM |
2686 | Powerpc_relobj<size, big_endian>* ppc_object |
2687 | = static_cast<Powerpc_relobj<size, big_endian>*>(object); | |
2688 | ||
42cacb20 DE |
2689 | switch (r_type) |
2690 | { | |
2691 | case elfcpp::R_POWERPC_NONE: | |
2692 | case elfcpp::R_POWERPC_GNU_VTINHERIT: | |
2693 | case elfcpp::R_POWERPC_GNU_VTENTRY: | |
cf43a2fe | 2694 | case elfcpp::R_PPC_LOCAL24PC: |
dd93cd0a | 2695 | case elfcpp::R_PPC_EMB_MRKREF: |
7404fe1b | 2696 | case elfcpp::R_POWERPC_TLS: |
dd93cd0a AM |
2697 | break; |
2698 | ||
2699 | case elfcpp::R_PPC64_TOC: | |
2700 | { | |
2701 | Output_data_got_powerpc<size, big_endian>* got | |
2702 | = target->got_section(symtab, layout); | |
2703 | if (parameters->options().output_is_position_independent()) | |
2704 | { | |
bfdfa4cd AM |
2705 | Address off = reloc.get_r_offset(); |
2706 | if (size == 64 | |
2707 | && data_shndx == ppc_object->opd_shndx() | |
2708 | && ppc_object->get_opd_discard(off - 8)) | |
2709 | break; | |
2710 | ||
dd93cd0a AM |
2711 | Reloc_section* rela_dyn = target->rela_dyn_section(layout); |
2712 | Powerpc_relobj<size, big_endian>* symobj = ppc_object; | |
2713 | if (data_shndx != ppc_object->opd_shndx()) | |
2714 | symobj = static_cast | |
2715 | <Powerpc_relobj<size, big_endian>*>(gsym->object()); | |
2716 | rela_dyn->add_output_section_relative(got->output_section(), | |
2717 | elfcpp::R_POWERPC_RELATIVE, | |
2718 | output_section, | |
bfdfa4cd | 2719 | object, data_shndx, off, |
dd93cd0a AM |
2720 | symobj->toc_base_offset()); |
2721 | } | |
2722 | } | |
42cacb20 DE |
2723 | break; |
2724 | ||
c9269dff | 2725 | case elfcpp::R_PPC64_ADDR64: |
bfdfa4cd AM |
2726 | if (size == 64 |
2727 | && data_shndx == ppc_object->opd_shndx() | |
2728 | && (gsym->is_defined_in_discarded_section() | |
2729 | || gsym->object() != object)) | |
2730 | { | |
2731 | ppc_object->set_opd_discard(reloc.get_r_offset()); | |
2732 | break; | |
2733 | } | |
2734 | // Fall thru | |
dd93cd0a | 2735 | case elfcpp::R_PPC64_UADDR64: |
c9269dff | 2736 | case elfcpp::R_POWERPC_ADDR32: |
dd93cd0a AM |
2737 | case elfcpp::R_POWERPC_UADDR32: |
2738 | case elfcpp::R_POWERPC_ADDR24: | |
42cacb20 DE |
2739 | case elfcpp::R_POWERPC_ADDR16: |
2740 | case elfcpp::R_POWERPC_ADDR16_LO: | |
2741 | case elfcpp::R_POWERPC_ADDR16_HI: | |
2742 | case elfcpp::R_POWERPC_ADDR16_HA: | |
dd93cd0a AM |
2743 | case elfcpp::R_POWERPC_UADDR16: |
2744 | case elfcpp::R_PPC64_ADDR16_HIGHER: | |
2745 | case elfcpp::R_PPC64_ADDR16_HIGHERA: | |
2746 | case elfcpp::R_PPC64_ADDR16_HIGHEST: | |
2747 | case elfcpp::R_PPC64_ADDR16_HIGHESTA: | |
2748 | case elfcpp::R_PPC64_ADDR16_DS: | |
2749 | case elfcpp::R_PPC64_ADDR16_LO_DS: | |
2750 | case elfcpp::R_POWERPC_ADDR14: | |
2751 | case elfcpp::R_POWERPC_ADDR14_BRTAKEN: | |
2752 | case elfcpp::R_POWERPC_ADDR14_BRNTAKEN: | |
42cacb20 | 2753 | { |
c9269dff AM |
2754 | // Make a PLT entry if necessary. |
2755 | if (gsym->needs_plt_entry()) | |
2756 | { | |
cf43a2fe | 2757 | target->make_plt_entry(layout, gsym, reloc, 0); |
2e702c99 RM |
2758 | // Since this is not a PC-relative relocation, we may be |
2759 | // taking the address of a function. In that case we need to | |
2760 | // set the entry in the dynamic symbol table to the address of | |
2761 | // the PLT entry. | |
cf43a2fe AM |
2762 | if (size == 32 |
2763 | && gsym->is_from_dynobj() && !parameters->options().shared()) | |
2e702c99 | 2764 | gsym->set_needs_dynsym_value(); |
c9269dff AM |
2765 | } |
2766 | // Make a dynamic relocation if necessary. | |
dd93cd0a | 2767 | if (needs_dynamic_reloc<size>(gsym, Scan::get_reference_flags(r_type))) |
c9269dff AM |
2768 | { |
2769 | if (gsym->may_need_copy_reloc()) | |
2770 | { | |
2771 | target->copy_reloc(symtab, layout, object, | |
2772 | data_shndx, output_section, gsym, reloc); | |
2773 | } | |
dd93cd0a AM |
2774 | else if (((size == 32 && r_type == elfcpp::R_POWERPC_ADDR32) |
2775 | || (size == 64 && r_type == elfcpp::R_PPC64_ADDR64)) | |
2776 | && (gsym->can_use_relative_reloc(false) | |
2777 | || data_shndx == ppc_object->opd_shndx())) | |
2e702c99 RM |
2778 | { |
2779 | Reloc_section* rela_dyn = target->rela_dyn_section(layout); | |
2780 | rela_dyn->add_global_relative(gsym, elfcpp::R_POWERPC_RELATIVE, | |
42cacb20 DE |
2781 | output_section, object, |
2782 | data_shndx, reloc.get_r_offset(), | |
13cf9988 | 2783 | reloc.get_r_addend(), false); |
2e702c99 RM |
2784 | } |
2785 | else | |
2786 | { | |
2787 | Reloc_section* rela_dyn = target->rela_dyn_section(layout); | |
42cacb20 | 2788 | check_non_pic(object, r_type); |
dd93cd0a AM |
2789 | rela_dyn->add_global(gsym, r_type, output_section, |
2790 | object, data_shndx, | |
2791 | reloc.get_r_offset(), | |
2792 | reloc.get_r_addend()); | |
2e702c99 RM |
2793 | } |
2794 | } | |
42cacb20 DE |
2795 | } |
2796 | break; | |
2797 | ||
cf43a2fe | 2798 | case elfcpp::R_PPC_PLTREL24: |
42cacb20 | 2799 | case elfcpp::R_POWERPC_REL24: |
3ea0a085 AM |
2800 | if (gsym->needs_plt_entry() |
2801 | || (!gsym->final_value_is_known() | |
2802 | && (gsym->is_undefined() | |
2803 | || gsym->is_from_dynobj() | |
2804 | || gsym->is_preemptible()))) | |
2805 | target->make_plt_entry(layout, gsym, reloc, object); | |
2806 | // Fall thru | |
42cacb20 | 2807 | |
3ea0a085 | 2808 | case elfcpp::R_PPC64_REL64: |
dd93cd0a | 2809 | case elfcpp::R_POWERPC_REL32: |
3ea0a085 AM |
2810 | // Make a dynamic relocation if necessary. |
2811 | if (needs_dynamic_reloc<size>(gsym, Scan::get_reference_flags(r_type))) | |
2812 | { | |
2813 | if (gsym->may_need_copy_reloc()) | |
2814 | { | |
2815 | target->copy_reloc(symtab, layout, object, | |
2816 | data_shndx, output_section, gsym, | |
2817 | reloc); | |
2818 | } | |
2819 | else | |
2820 | { | |
2821 | Reloc_section* rela_dyn = target->rela_dyn_section(layout); | |
2822 | check_non_pic(object, r_type); | |
2823 | rela_dyn->add_global(gsym, r_type, output_section, object, | |
2824 | data_shndx, reloc.get_r_offset(), | |
2825 | reloc.get_r_addend()); | |
2826 | } | |
2827 | } | |
2828 | break; | |
2829 | ||
6ce78956 AM |
2830 | case elfcpp::R_POWERPC_REL16: |
2831 | case elfcpp::R_POWERPC_REL16_LO: | |
2832 | case elfcpp::R_POWERPC_REL16_HI: | |
2833 | case elfcpp::R_POWERPC_REL16_HA: | |
dd93cd0a AM |
2834 | case elfcpp::R_POWERPC_REL14: |
2835 | case elfcpp::R_POWERPC_REL14_BRTAKEN: | |
2836 | case elfcpp::R_POWERPC_REL14_BRNTAKEN: | |
2837 | case elfcpp::R_POWERPC_SECTOFF: | |
2838 | case elfcpp::R_POWERPC_TPREL16: | |
2839 | case elfcpp::R_POWERPC_DTPREL16: | |
2840 | case elfcpp::R_POWERPC_SECTOFF_LO: | |
2841 | case elfcpp::R_POWERPC_TPREL16_LO: | |
2842 | case elfcpp::R_POWERPC_DTPREL16_LO: | |
2843 | case elfcpp::R_POWERPC_SECTOFF_HI: | |
2844 | case elfcpp::R_POWERPC_TPREL16_HI: | |
2845 | case elfcpp::R_POWERPC_DTPREL16_HI: | |
2846 | case elfcpp::R_POWERPC_SECTOFF_HA: | |
2847 | case elfcpp::R_POWERPC_TPREL16_HA: | |
2848 | case elfcpp::R_POWERPC_DTPREL16_HA: | |
2849 | case elfcpp::R_PPC64_DTPREL16_HIGHER: | |
2850 | case elfcpp::R_PPC64_TPREL16_HIGHER: | |
2851 | case elfcpp::R_PPC64_DTPREL16_HIGHERA: | |
2852 | case elfcpp::R_PPC64_TPREL16_HIGHERA: | |
2853 | case elfcpp::R_PPC64_DTPREL16_HIGHEST: | |
2854 | case elfcpp::R_PPC64_TPREL16_HIGHEST: | |
2855 | case elfcpp::R_PPC64_DTPREL16_HIGHESTA: | |
2856 | case elfcpp::R_PPC64_TPREL16_HIGHESTA: | |
2857 | case elfcpp::R_PPC64_TPREL16_DS: | |
2858 | case elfcpp::R_PPC64_TPREL16_LO_DS: | |
2859 | case elfcpp::R_PPC64_DTPREL16_DS: | |
2860 | case elfcpp::R_PPC64_DTPREL16_LO_DS: | |
2861 | case elfcpp::R_PPC64_SECTOFF_DS: | |
2862 | case elfcpp::R_PPC64_SECTOFF_LO_DS: | |
2863 | case elfcpp::R_PPC64_TLSGD: | |
2864 | case elfcpp::R_PPC64_TLSLD: | |
cf43a2fe AM |
2865 | break; |
2866 | ||
42cacb20 DE |
2867 | case elfcpp::R_POWERPC_GOT16: |
2868 | case elfcpp::R_POWERPC_GOT16_LO: | |
2869 | case elfcpp::R_POWERPC_GOT16_HI: | |
2870 | case elfcpp::R_POWERPC_GOT16_HA: | |
dd93cd0a AM |
2871 | case elfcpp::R_PPC64_GOT16_DS: |
2872 | case elfcpp::R_PPC64_GOT16_LO_DS: | |
42cacb20 | 2873 | { |
c9269dff AM |
2874 | // The symbol requires a GOT entry. |
2875 | Output_data_got_powerpc<size, big_endian>* got; | |
42cacb20 DE |
2876 | |
2877 | got = target->got_section(symtab, layout); | |
2e702c99 RM |
2878 | if (gsym->final_value_is_known()) |
2879 | got->add_global(gsym, GOT_TYPE_STANDARD); | |
2880 | else | |
2881 | { | |
2882 | // If this symbol is not fully resolved, we need to add a | |
2883 | // dynamic relocation for it. | |
2884 | Reloc_section* rela_dyn = target->rela_dyn_section(layout); | |
2885 | if (gsym->is_from_dynobj() | |
2886 | || gsym->is_undefined() | |
2887 | || gsym->is_preemptible()) | |
2888 | got->add_global_with_rel(gsym, GOT_TYPE_STANDARD, rela_dyn, | |
83896202 | 2889 | elfcpp::R_POWERPC_GLOB_DAT); |
2e702c99 RM |
2890 | else if (!gsym->has_got_offset(GOT_TYPE_STANDARD)) |
2891 | { | |
42cacb20 DE |
2892 | unsigned int off = got->add_constant(0); |
2893 | ||
2894 | gsym->set_got_offset(GOT_TYPE_STANDARD, off); | |
2895 | rela_dyn->add_global_relative(gsym, elfcpp::R_POWERPC_RELATIVE, | |
13cf9988 | 2896 | got, off, 0, false); |
42cacb20 | 2897 | } |
2e702c99 | 2898 | } |
42cacb20 DE |
2899 | } |
2900 | break; | |
2901 | ||
cf43a2fe AM |
2902 | case elfcpp::R_PPC64_TOC16: |
2903 | case elfcpp::R_PPC64_TOC16_LO: | |
2904 | case elfcpp::R_PPC64_TOC16_HI: | |
2905 | case elfcpp::R_PPC64_TOC16_HA: | |
2906 | case elfcpp::R_PPC64_TOC16_DS: | |
2907 | case elfcpp::R_PPC64_TOC16_LO_DS: | |
42cacb20 DE |
2908 | // We need a GOT section. |
2909 | target->got_section(symtab, layout); | |
2910 | break; | |
2911 | ||
dd93cd0a AM |
2912 | case elfcpp::R_POWERPC_GOT_TLSGD16: |
2913 | case elfcpp::R_POWERPC_GOT_TLSGD16_LO: | |
2914 | case elfcpp::R_POWERPC_GOT_TLSGD16_HI: | |
2915 | case elfcpp::R_POWERPC_GOT_TLSGD16_HA: | |
2916 | { | |
2917 | const bool final = gsym->final_value_is_known(); | |
2918 | const tls::Tls_optimization tls_type = target->optimize_tls_gd(final); | |
2919 | if (tls_type == tls::TLSOPT_NONE) | |
2920 | { | |
2921 | Output_data_got_powerpc<size, big_endian>* got | |
2922 | = target->got_section(symtab, layout); | |
2923 | got->add_global_pair_with_rel(gsym, GOT_TYPE_TLSGD, | |
2924 | target->rela_dyn_section(layout), | |
2925 | elfcpp::R_POWERPC_DTPMOD, | |
2926 | elfcpp::R_POWERPC_DTPREL); | |
2927 | } | |
2928 | else if (tls_type == tls::TLSOPT_TO_IE) | |
2929 | { | |
2930 | Output_data_got_powerpc<size, big_endian>* got | |
2931 | = target->got_section(symtab, layout); | |
2932 | got->add_global_with_rel(gsym, GOT_TYPE_TPREL, | |
2933 | target->rela_dyn_section(layout), | |
2934 | elfcpp::R_POWERPC_TPREL); | |
2935 | } | |
2936 | else if (tls_type == tls::TLSOPT_TO_LE) | |
2937 | { | |
2938 | // no GOT relocs needed for Local Exec. | |
2939 | } | |
2940 | else | |
2941 | gold_unreachable(); | |
2942 | } | |
42cacb20 DE |
2943 | break; |
2944 | ||
dd93cd0a AM |
2945 | case elfcpp::R_POWERPC_GOT_TLSLD16: |
2946 | case elfcpp::R_POWERPC_GOT_TLSLD16_LO: | |
2947 | case elfcpp::R_POWERPC_GOT_TLSLD16_HI: | |
2948 | case elfcpp::R_POWERPC_GOT_TLSLD16_HA: | |
2949 | { | |
2950 | const tls::Tls_optimization tls_type = target->optimize_tls_ld(); | |
2951 | if (tls_type == tls::TLSOPT_NONE) | |
2952 | target->tlsld_got_offset(symtab, layout, object); | |
2953 | else if (tls_type == tls::TLSOPT_TO_LE) | |
2954 | { | |
2955 | // no GOT relocs needed for Local Exec. | |
7404fe1b AM |
2956 | if (parameters->options().emit_relocs()) |
2957 | { | |
2958 | Output_section* os = layout->tls_segment()->first_section(); | |
2959 | gold_assert(os != NULL); | |
2960 | os->set_needs_symtab_index(); | |
2961 | } | |
dd93cd0a AM |
2962 | } |
2963 | else | |
2964 | gold_unreachable(); | |
2965 | } | |
2966 | break; | |
2967 | ||
2968 | case elfcpp::R_POWERPC_GOT_DTPREL16: | |
2969 | case elfcpp::R_POWERPC_GOT_DTPREL16_LO: | |
2970 | case elfcpp::R_POWERPC_GOT_DTPREL16_HI: | |
2971 | case elfcpp::R_POWERPC_GOT_DTPREL16_HA: | |
2972 | { | |
2973 | Output_data_got_powerpc<size, big_endian>* got | |
2974 | = target->got_section(symtab, layout); | |
bd73a62d AM |
2975 | if (!gsym->final_value_is_known() |
2976 | && (gsym->is_from_dynobj() | |
2977 | || gsym->is_undefined() | |
2978 | || gsym->is_preemptible())) | |
2979 | got->add_global_with_rel(gsym, GOT_TYPE_DTPREL, | |
2980 | target->rela_dyn_section(layout), | |
2981 | elfcpp::R_POWERPC_DTPREL); | |
2982 | else | |
2983 | got->add_global_tls(gsym, GOT_TYPE_DTPREL); | |
dd93cd0a AM |
2984 | } |
2985 | break; | |
2986 | ||
2987 | case elfcpp::R_POWERPC_GOT_TPREL16: | |
2988 | case elfcpp::R_POWERPC_GOT_TPREL16_LO: | |
2989 | case elfcpp::R_POWERPC_GOT_TPREL16_HI: | |
2990 | case elfcpp::R_POWERPC_GOT_TPREL16_HA: | |
2991 | { | |
2992 | const bool final = gsym->final_value_is_known(); | |
2993 | const tls::Tls_optimization tls_type = target->optimize_tls_ie(final); | |
2994 | if (tls_type == tls::TLSOPT_NONE) | |
2995 | { | |
2996 | Output_data_got_powerpc<size, big_endian>* got | |
2997 | = target->got_section(symtab, layout); | |
bd73a62d AM |
2998 | if (!gsym->final_value_is_known() |
2999 | && (gsym->is_from_dynobj() | |
3000 | || gsym->is_undefined() | |
3001 | || gsym->is_preemptible())) | |
3002 | got->add_global_with_rel(gsym, GOT_TYPE_TPREL, | |
3003 | target->rela_dyn_section(layout), | |
3004 | elfcpp::R_POWERPC_TPREL); | |
3005 | else | |
3006 | got->add_global_tls(gsym, GOT_TYPE_TPREL); | |
dd93cd0a AM |
3007 | } |
3008 | else if (tls_type == tls::TLSOPT_TO_LE) | |
3009 | { | |
3010 | // no GOT relocs needed for Local Exec. | |
3011 | } | |
3012 | else | |
3013 | gold_unreachable(); | |
3014 | } | |
42cacb20 DE |
3015 | break; |
3016 | ||
3017 | default: | |
3018 | unsupported_reloc_global(object, r_type, gsym); | |
3019 | break; | |
3020 | } | |
3021 | } | |
3022 | ||
6d03d481 ST |
3023 | // Process relocations for gc. |
3024 | ||
3025 | template<int size, bool big_endian> | |
3026 | void | |
3027 | Target_powerpc<size, big_endian>::gc_process_relocs( | |
d83ce4e3 AM |
3028 | Symbol_table* symtab, |
3029 | Layout* layout, | |
3030 | Sized_relobj_file<size, big_endian>* object, | |
3031 | unsigned int data_shndx, | |
3032 | unsigned int, | |
3033 | const unsigned char* prelocs, | |
3034 | size_t reloc_count, | |
3035 | Output_section* output_section, | |
3036 | bool needs_special_offset_handling, | |
3037 | size_t local_symbol_count, | |
3038 | const unsigned char* plocal_symbols) | |
6d03d481 ST |
3039 | { |
3040 | typedef Target_powerpc<size, big_endian> Powerpc; | |
2ea97941 | 3041 | typedef typename Target_powerpc<size, big_endian>::Scan Scan; |
e81fea4d AM |
3042 | Powerpc_relobj<size, big_endian>* ppc_object |
3043 | = static_cast<Powerpc_relobj<size, big_endian>*>(object); | |
3044 | if (size == 64) | |
3045 | ppc_object->set_opd_valid(); | |
3046 | if (size == 64 && data_shndx == ppc_object->opd_shndx()) | |
3047 | { | |
3048 | typename Powerpc_relobj<size, big_endian>::Access_from::iterator p; | |
3049 | for (p = ppc_object->access_from_map()->begin(); | |
3050 | p != ppc_object->access_from_map()->end(); | |
3051 | ++p) | |
3052 | { | |
3053 | Address dst_off = p->first; | |
3054 | unsigned int dst_indx = ppc_object->get_opd_ent(dst_off); | |
3055 | typename Powerpc_relobj<size, big_endian>::Section_refs::iterator s; | |
3056 | for (s = p->second.begin(); s != p->second.end(); ++s) | |
3057 | { | |
3058 | Object* src_obj = s->first; | |
3059 | unsigned int src_indx = s->second; | |
3060 | symtab->gc()->add_reference(src_obj, src_indx, | |
3061 | ppc_object, dst_indx); | |
3062 | } | |
3063 | p->second.clear(); | |
3064 | } | |
3065 | ppc_object->access_from_map()->clear(); | |
3066 | // Don't look at .opd relocs as .opd will reference everything. | |
3067 | return; | |
3068 | } | |
6d03d481 | 3069 | |
41cbeecc | 3070 | gold::gc_process_relocs<size, big_endian, Powerpc, elfcpp::SHT_RELA, Scan, |
3ff2ccb0 | 3071 | typename Target_powerpc::Relocatable_size_for_reloc>( |
6d03d481 ST |
3072 | symtab, |
3073 | layout, | |
3074 | this, | |
3075 | object, | |
3076 | data_shndx, | |
3077 | prelocs, | |
3078 | reloc_count, | |
3079 | output_section, | |
3080 | needs_special_offset_handling, | |
3081 | local_symbol_count, | |
3082 | plocal_symbols); | |
3083 | } | |
3084 | ||
e81fea4d AM |
3085 | // Handle target specific gc actions when adding a gc reference from |
3086 | // SRC_OBJ, SRC_SHNDX to a location specified by DST_OBJ, DST_SHNDX | |
3087 | // and DST_OFF. For powerpc64, this adds a referenc to the code | |
3088 | // section of a function descriptor. | |
3089 | ||
3090 | template<int size, bool big_endian> | |
3091 | void | |
3092 | Target_powerpc<size, big_endian>::do_gc_add_reference( | |
3093 | Symbol_table* symtab, | |
3094 | Object* src_obj, | |
3095 | unsigned int src_shndx, | |
3096 | Object* dst_obj, | |
3097 | unsigned int dst_shndx, | |
3098 | Address dst_off) const | |
3099 | { | |
3100 | Powerpc_relobj<size, big_endian>* ppc_object | |
3101 | = static_cast<Powerpc_relobj<size, big_endian>*>(dst_obj); | |
3102 | if (size == 64 && dst_shndx == ppc_object->opd_shndx()) | |
3103 | { | |
3104 | if (ppc_object->opd_valid()) | |
3105 | { | |
3106 | dst_shndx = ppc_object->get_opd_ent(dst_off); | |
3107 | symtab->gc()->add_reference(src_obj, src_shndx, dst_obj, dst_shndx); | |
3108 | } | |
3109 | else | |
3110 | { | |
3111 | // If we haven't run scan_opd_relocs, we must delay | |
3112 | // processing this function descriptor reference. | |
3113 | ppc_object->add_reference(src_obj, src_shndx, dst_off); | |
3114 | } | |
3115 | } | |
3116 | } | |
3117 | ||
3118 | // Add any special sections for this symbol to the gc work list. | |
3119 | // For powerpc64, this adds the code section of a function | |
3120 | // descriptor. | |
3121 | ||
3122 | template<int size, bool big_endian> | |
3123 | void | |
3124 | Target_powerpc<size, big_endian>::do_gc_mark_symbol( | |
3125 | Symbol_table* symtab, | |
3126 | Symbol* sym) const | |
3127 | { | |
3128 | if (size == 64) | |
3129 | { | |
3130 | Powerpc_relobj<size, big_endian>* ppc_object | |
3131 | = static_cast<Powerpc_relobj<size, big_endian>*>(sym->object()); | |
3132 | bool is_ordinary; | |
3133 | unsigned int shndx = sym->shndx(&is_ordinary); | |
3134 | if (is_ordinary && shndx == ppc_object->opd_shndx()) | |
3135 | { | |
3136 | Sized_symbol<size>* gsym = symtab->get_sized_symbol<size>(sym); | |
3137 | Address dst_off = gsym->value(); | |
3138 | unsigned int dst_indx = ppc_object->get_opd_ent(dst_off); | |
3139 | symtab->gc()->worklist().push(Section_id(ppc_object, dst_indx)); | |
3140 | } | |
3141 | } | |
3142 | } | |
3143 | ||
42cacb20 DE |
3144 | // Scan relocations for a section. |
3145 | ||
3146 | template<int size, bool big_endian> | |
3147 | void | |
3148 | Target_powerpc<size, big_endian>::scan_relocs( | |
d83ce4e3 AM |
3149 | Symbol_table* symtab, |
3150 | Layout* layout, | |
3151 | Sized_relobj_file<size, big_endian>* object, | |
3152 | unsigned int data_shndx, | |
3153 | unsigned int sh_type, | |
3154 | const unsigned char* prelocs, | |
3155 | size_t reloc_count, | |
3156 | Output_section* output_section, | |
3157 | bool needs_special_offset_handling, | |
3158 | size_t local_symbol_count, | |
3159 | const unsigned char* plocal_symbols) | |
42cacb20 DE |
3160 | { |
3161 | typedef Target_powerpc<size, big_endian> Powerpc; | |
2ea97941 | 3162 | typedef typename Target_powerpc<size, big_endian>::Scan Scan; |
42cacb20 DE |
3163 | |
3164 | if (sh_type == elfcpp::SHT_REL) | |
3165 | { | |
3166 | gold_error(_("%s: unsupported REL reloc section"), | |
3167 | object->name().c_str()); | |
3168 | return; | |
3169 | } | |
3170 | ||
cf43a2fe AM |
3171 | if (size == 32) |
3172 | { | |
3173 | static Output_data_space* sdata; | |
3174 | ||
3175 | // Define _SDA_BASE_ at the start of the .sdata section. | |
3176 | if (sdata == NULL) | |
3177 | { | |
3178 | // layout->find_output_section(".sdata") == NULL | |
3179 | sdata = new Output_data_space(4, "** sdata"); | |
3180 | Output_section* os | |
3181 | = layout->add_output_section_data(".sdata", 0, | |
3182 | elfcpp::SHF_ALLOC | |
3183 | | elfcpp::SHF_WRITE, | |
3184 | sdata, ORDER_SMALL_DATA, false); | |
3185 | symtab->define_in_output_data("_SDA_BASE_", NULL, | |
3186 | Symbol_table::PREDEFINED, | |
3187 | os, 32768, 0, elfcpp::STT_OBJECT, | |
3188 | elfcpp::STB_LOCAL, elfcpp::STV_HIDDEN, | |
3189 | 0, false, false); | |
3190 | } | |
3191 | } | |
42cacb20 | 3192 | |
2ea97941 | 3193 | gold::scan_relocs<size, big_endian, Powerpc, elfcpp::SHT_RELA, Scan>( |
42cacb20 DE |
3194 | symtab, |
3195 | layout, | |
3196 | this, | |
3197 | object, | |
3198 | data_shndx, | |
3199 | prelocs, | |
3200 | reloc_count, | |
3201 | output_section, | |
3202 | needs_special_offset_handling, | |
3203 | local_symbol_count, | |
3204 | plocal_symbols); | |
3205 | } | |
3206 | ||
3207 | // Finalize the sections. | |
3208 | ||
3209 | template<int size, bool big_endian> | |
3210 | void | |
d5b40221 DK |
3211 | Target_powerpc<size, big_endian>::do_finalize_sections( |
3212 | Layout* layout, | |
f59f41f3 DK |
3213 | const Input_objects*, |
3214 | Symbol_table*) | |
42cacb20 DE |
3215 | { |
3216 | // Fill in some more dynamic tags. | |
ea715a34 ILT |
3217 | const Reloc_section* rel_plt = (this->plt_ == NULL |
3218 | ? NULL | |
3219 | : this->plt_->rel_plt()); | |
3220 | layout->add_target_dynamic_tags(false, this->plt_, rel_plt, | |
612a8d3d | 3221 | this->rela_dyn_, true, size == 32); |
42cacb20 | 3222 | |
c9269dff | 3223 | Output_data_dynamic* odyn = layout->dynamic_data(); |
cf43a2fe AM |
3224 | if (size == 32) |
3225 | { | |
dd93cd0a AM |
3226 | if (this->got_ != NULL) |
3227 | { | |
3228 | this->got_->finalize_data_size(); | |
3229 | odyn->add_section_plus_offset(elfcpp::DT_PPC_GOT, | |
3230 | this->got_, this->got_->g_o_t()); | |
3231 | } | |
cf43a2fe | 3232 | } |
c9269dff AM |
3233 | else |
3234 | { | |
dd93cd0a AM |
3235 | if (this->glink_ != NULL) |
3236 | { | |
3237 | this->glink_->finalize_data_size(); | |
3238 | odyn->add_section_plus_offset(elfcpp::DT_PPC64_GLINK, | |
3239 | this->glink_, | |
3240 | (this->glink_->pltresolve() | |
3241 | + this->glink_->pltresolve_size - 32)); | |
3242 | } | |
c9269dff | 3243 | } |
cf43a2fe | 3244 | |
42cacb20 DE |
3245 | // Emit any relocs we saved in an attempt to avoid generating COPY |
3246 | // relocs. | |
3247 | if (this->copy_relocs_.any_saved_relocs()) | |
3248 | this->copy_relocs_.emit(this->rela_dyn_section(layout)); | |
3249 | } | |
3250 | ||
3ea0a085 AM |
3251 | // Return the value to use for a branch relocation. |
3252 | ||
3253 | template<int size, bool big_endian> | |
3254 | typename elfcpp::Elf_types<size>::Elf_Addr | |
3255 | Target_powerpc<size, big_endian>::symval_for_branch( | |
3256 | Address value, | |
3257 | const Sized_symbol<size>* gsym, | |
3258 | Powerpc_relobj<size, big_endian>* object, | |
3259 | unsigned int *dest_shndx) | |
3260 | { | |
3261 | *dest_shndx = 0; | |
3262 | if (size == 32) | |
3263 | return value; | |
3264 | ||
3265 | // If the symbol is defined in an opd section, ie. is a function | |
3266 | // descriptor, use the function descriptor code entry address | |
3267 | Powerpc_relobj<size, big_endian>* symobj = object; | |
3268 | if (gsym != NULL) | |
3269 | symobj = static_cast<Powerpc_relobj<size, big_endian>*>(gsym->object()); | |
3270 | unsigned int shndx = symobj->opd_shndx(); | |
3271 | if (shndx == 0) | |
3272 | return value; | |
3273 | Address opd_addr = symobj->get_output_section_offset(shndx); | |
3274 | gold_assert(opd_addr != invalid_address); | |
3275 | opd_addr += symobj->output_section(shndx)->address(); | |
3276 | if (value >= opd_addr && value < opd_addr + symobj->section_size(shndx)) | |
3277 | { | |
3278 | Address sec_off; | |
e81fea4d | 3279 | *dest_shndx = symobj->get_opd_ent(value - opd_addr, &sec_off); |
3ea0a085 AM |
3280 | Address sec_addr = symobj->get_output_section_offset(*dest_shndx); |
3281 | gold_assert(sec_addr != invalid_address); | |
3282 | sec_addr += symobj->output_section(*dest_shndx)->address(); | |
3283 | value = sec_addr + sec_off; | |
3284 | } | |
3285 | return value; | |
3286 | } | |
3287 | ||
42cacb20 DE |
3288 | // Perform a relocation. |
3289 | ||
3290 | template<int size, bool big_endian> | |
3291 | inline bool | |
3292 | Target_powerpc<size, big_endian>::Relocate::relocate( | |
d83ce4e3 AM |
3293 | const Relocate_info<size, big_endian>* relinfo, |
3294 | Target_powerpc* target, | |
3295 | Output_section* os, | |
3296 | size_t relnum, | |
3297 | const elfcpp::Rela<size, big_endian>& rela, | |
3298 | unsigned int r_type, | |
3299 | const Sized_symbol<size>* gsym, | |
3300 | const Symbol_value<size>* psymval, | |
3301 | unsigned char* view, | |
c9269dff AM |
3302 | Address address, |
3303 | section_size_type view_size) | |
42cacb20 | 3304 | { |
dd93cd0a AM |
3305 | |
3306 | bool is_tls_call = ((r_type == elfcpp::R_POWERPC_REL24 | |
3307 | || r_type == elfcpp::R_PPC_PLTREL24) | |
3308 | && gsym != NULL | |
3309 | && strcmp(gsym->name(), "__tls_get_addr") == 0); | |
3310 | enum skip_tls last_tls = this->call_tls_get_addr_; | |
3311 | this->call_tls_get_addr_ = CALL_NOT_EXPECTED; | |
3312 | if (is_tls_call) | |
3313 | { | |
3314 | if (last_tls == CALL_NOT_EXPECTED) | |
3315 | gold_error_at_location(relinfo, relnum, rela.get_r_offset(), | |
3316 | _("__tls_get_addr call lacks marker reloc")); | |
3317 | else if (last_tls == CALL_SKIP) | |
3318 | return false; | |
3319 | } | |
3320 | else if (last_tls != CALL_NOT_EXPECTED) | |
3321 | gold_error_at_location(relinfo, relnum, rela.get_r_offset(), | |
3322 | _("missing expected __tls_get_addr call")); | |
3323 | ||
42cacb20 | 3324 | typedef Powerpc_relocate_functions<size, big_endian> Reloc; |
dd93cd0a | 3325 | typedef typename elfcpp::Swap<32, big_endian>::Valtype Insn; |
3ea0a085 AM |
3326 | Powerpc_relobj<size, big_endian>* const object |
3327 | = static_cast<Powerpc_relobj<size, big_endian>*>(relinfo->object); | |
dd93cd0a AM |
3328 | Address value = 0; |
3329 | bool has_plt_value = false; | |
3330 | if (gsym != NULL | |
3331 | && use_plt_offset<size>(gsym, Scan::get_reference_flags(r_type))) | |
3332 | { | |
3333 | const Output_data_glink<size, big_endian>* glink | |
3334 | = target->glink_section(); | |
3335 | unsigned int glink_index = glink->find_entry(gsym, rela, object); | |
3336 | value = glink->address() + glink_index * glink->glink_entry_size(); | |
3337 | has_plt_value = true; | |
3338 | } | |
cf43a2fe AM |
3339 | |
3340 | if (r_type == elfcpp::R_POWERPC_GOT16 | |
3341 | || r_type == elfcpp::R_POWERPC_GOT16_LO | |
3342 | || r_type == elfcpp::R_POWERPC_GOT16_HI | |
3343 | || r_type == elfcpp::R_POWERPC_GOT16_HA | |
3344 | || r_type == elfcpp::R_PPC64_GOT16_DS | |
3345 | || r_type == elfcpp::R_PPC64_GOT16_LO_DS) | |
42cacb20 | 3346 | { |
cf43a2fe AM |
3347 | if (gsym != NULL) |
3348 | { | |
3349 | gold_assert(gsym->has_got_offset(GOT_TYPE_STANDARD)); | |
3350 | value = gsym->got_offset(GOT_TYPE_STANDARD); | |
3351 | } | |
3352 | else | |
3353 | { | |
3354 | unsigned int r_sym = elfcpp::elf_r_sym<size>(rela.get_r_info()); | |
3355 | gold_assert(object->local_has_got_offset(r_sym, GOT_TYPE_STANDARD)); | |
3356 | value = object->local_got_offset(r_sym, GOT_TYPE_STANDARD); | |
3357 | } | |
dd93cd0a | 3358 | value -= target->got_section()->got_base_offset(object); |
cf43a2fe AM |
3359 | } |
3360 | else if (r_type == elfcpp::R_PPC64_TOC) | |
3361 | { | |
c9269dff | 3362 | value = (target->got_section()->output_section()->address() |
dd93cd0a | 3363 | + object->toc_base_offset()); |
cf43a2fe AM |
3364 | } |
3365 | else if (gsym != NULL | |
3366 | && (r_type == elfcpp::R_POWERPC_REL24 | |
3367 | || r_type == elfcpp::R_PPC_PLTREL24) | |
dd93cd0a | 3368 | && has_plt_value) |
cf43a2fe | 3369 | { |
c9269dff AM |
3370 | if (size == 64) |
3371 | { | |
3372 | typedef typename elfcpp::Swap<32, big_endian>::Valtype Valtype; | |
3373 | Valtype* wv = reinterpret_cast<Valtype*>(view); | |
3374 | bool can_plt_call = false; | |
3375 | if (rela.get_r_offset() + 8 <= view_size) | |
3376 | { | |
3ea0a085 | 3377 | Valtype insn = elfcpp::Swap<32, big_endian>::readval(wv); |
c9269dff | 3378 | Valtype insn2 = elfcpp::Swap<32, big_endian>::readval(wv + 1); |
3ea0a085 AM |
3379 | if ((insn & 1) != 0 |
3380 | && (insn2 == nop | |
3381 | || insn2 == cror_15_15_15 || insn2 == cror_31_31_31)) | |
c9269dff AM |
3382 | { |
3383 | elfcpp::Swap<32, big_endian>::writeval(wv + 1, ld_2_1 + 40); | |
3384 | can_plt_call = true; | |
3385 | } | |
3386 | } | |
3387 | if (!can_plt_call) | |
3ea0a085 AM |
3388 | { |
3389 | // If we don't have a branch and link followed by a nop, | |
3390 | // we can't go via the plt because there is no place to | |
3391 | // put a toc restoring instruction. | |
3392 | // Unless we know we won't be returning. | |
3393 | if (strcmp(gsym->name(), "__libc_start_main") == 0) | |
3394 | can_plt_call = true; | |
3395 | } | |
3396 | if (!can_plt_call) | |
3397 | { | |
3398 | // This is not an error in one special case: A self | |
3399 | // call. It isn't possible to cheaply verify we have | |
3400 | // such a call so just check for a call to the same | |
3401 | // section. | |
3402 | bool ok = false; | |
3403 | if (gsym->source() == Symbol::FROM_OBJECT | |
3404 | && gsym->object() == object) | |
3405 | { | |
3406 | Address addend = rela.get_r_addend(); | |
3407 | unsigned int dest_shndx; | |
3408 | value = psymval->value(object, addend); | |
3409 | value = target->symval_for_branch(value, gsym, object, | |
3410 | &dest_shndx); | |
3411 | bool is_ordinary; | |
3412 | if (dest_shndx == 0) | |
3413 | dest_shndx = gsym->shndx(&is_ordinary); | |
3414 | ok = dest_shndx == relinfo->data_shndx; | |
3415 | } | |
3416 | if (!ok) | |
3417 | gold_error_at_location(relinfo, relnum, rela.get_r_offset(), | |
3418 | _("call lacks nop, can't restore toc; " | |
3419 | "recompile with -fPIC")); | |
3420 | } | |
c9269dff | 3421 | } |
cf43a2fe | 3422 | } |
dd93cd0a AM |
3423 | else if (r_type == elfcpp::R_POWERPC_GOT_TLSGD16 |
3424 | || r_type == elfcpp::R_POWERPC_GOT_TLSGD16_LO | |
3425 | || r_type == elfcpp::R_POWERPC_GOT_TLSGD16_HI | |
3426 | || r_type == elfcpp::R_POWERPC_GOT_TLSGD16_HA) | |
3427 | { | |
3428 | // First instruction of a global dynamic sequence, arg setup insn. | |
3429 | const bool final = gsym == NULL || gsym->final_value_is_known(); | |
3430 | const tls::Tls_optimization tls_type = target->optimize_tls_gd(final); | |
3431 | enum Got_type got_type = GOT_TYPE_STANDARD; | |
3432 | if (tls_type == tls::TLSOPT_NONE) | |
3433 | got_type = GOT_TYPE_TLSGD; | |
3434 | else if (tls_type == tls::TLSOPT_TO_IE) | |
3435 | got_type = GOT_TYPE_TPREL; | |
3436 | if (got_type != GOT_TYPE_STANDARD) | |
3437 | { | |
3438 | if (gsym != NULL) | |
3439 | { | |
3440 | gold_assert(gsym->has_got_offset(got_type)); | |
3441 | value = gsym->got_offset(got_type); | |
3442 | } | |
3443 | else | |
3444 | { | |
3445 | unsigned int r_sym = elfcpp::elf_r_sym<size>(rela.get_r_info()); | |
3446 | gold_assert(object->local_has_got_offset(r_sym, got_type)); | |
3447 | value = object->local_got_offset(r_sym, got_type); | |
3448 | } | |
3449 | value -= target->got_section()->got_base_offset(object); | |
3450 | } | |
3451 | if (tls_type == tls::TLSOPT_TO_IE) | |
3452 | { | |
3453 | if (r_type == elfcpp::R_POWERPC_GOT_TLSGD16 | |
3454 | || r_type == elfcpp::R_POWERPC_GOT_TLSGD16_LO) | |
3455 | { | |
3456 | Insn* iview = reinterpret_cast<Insn*>(view - 2 * big_endian); | |
3457 | Insn insn = elfcpp::Swap<32, big_endian>::readval(iview); | |
3458 | insn &= (1 << 26) - (1 << 16); // extract rt,ra from addi | |
3459 | if (size == 32) | |
3460 | insn |= 32 << 26; // lwz | |
3461 | else | |
3462 | insn |= 58 << 26; // ld | |
3463 | elfcpp::Swap<32, big_endian>::writeval(iview, insn); | |
3464 | } | |
3465 | r_type += (elfcpp::R_POWERPC_GOT_TPREL16 | |
3466 | - elfcpp::R_POWERPC_GOT_TLSGD16); | |
3467 | } | |
3468 | else if (tls_type == tls::TLSOPT_TO_LE) | |
3469 | { | |
3470 | if (r_type == elfcpp::R_POWERPC_GOT_TLSGD16 | |
3471 | || r_type == elfcpp::R_POWERPC_GOT_TLSGD16_LO) | |
3472 | { | |
3473 | Insn* iview = reinterpret_cast<Insn*>(view - 2 * big_endian); | |
3474 | Insn insn = addis_3_13; | |
3475 | if (size == 32) | |
3476 | insn = addis_3_2; | |
3477 | elfcpp::Swap<32, big_endian>::writeval(iview, insn); | |
3478 | r_type = elfcpp::R_POWERPC_TPREL16_HA; | |
3479 | value = psymval->value(object, rela.get_r_addend()); | |
3480 | } | |
3481 | else | |
3482 | { | |
3483 | Insn* iview = reinterpret_cast<Insn*>(view - 2 * big_endian); | |
3484 | Insn insn = nop; | |
3485 | elfcpp::Swap<32, big_endian>::writeval(iview, insn); | |
3486 | r_type = elfcpp::R_POWERPC_NONE; | |
3487 | } | |
3488 | } | |
3489 | } | |
3490 | else if (r_type == elfcpp::R_POWERPC_GOT_TLSLD16 | |
3491 | || r_type == elfcpp::R_POWERPC_GOT_TLSLD16_LO | |
3492 | || r_type == elfcpp::R_POWERPC_GOT_TLSLD16_HI | |
3493 | || r_type == elfcpp::R_POWERPC_GOT_TLSLD16_HA) | |
3494 | { | |
3495 | // First instruction of a local dynamic sequence, arg setup insn. | |
3496 | const tls::Tls_optimization tls_type = target->optimize_tls_ld(); | |
3497 | if (tls_type == tls::TLSOPT_NONE) | |
3498 | { | |
3499 | value = target->tlsld_got_offset(); | |
3500 | value -= target->got_section()->got_base_offset(object); | |
3501 | } | |
3502 | else | |
3503 | { | |
3504 | gold_assert(tls_type == tls::TLSOPT_TO_LE); | |
3505 | if (r_type == elfcpp::R_POWERPC_GOT_TLSLD16 | |
3506 | || r_type == elfcpp::R_POWERPC_GOT_TLSLD16_LO) | |
3507 | { | |
3508 | Insn* iview = reinterpret_cast<Insn*>(view - 2 * big_endian); | |
3509 | Insn insn = addis_3_13; | |
3510 | if (size == 32) | |
3511 | insn = addis_3_2; | |
3512 | elfcpp::Swap<32, big_endian>::writeval(iview, insn); | |
3513 | r_type = elfcpp::R_POWERPC_TPREL16_HA; | |
7404fe1b | 3514 | value = dtp_offset; |
dd93cd0a AM |
3515 | } |
3516 | else | |
3517 | { | |
3518 | Insn* iview = reinterpret_cast<Insn*>(view - 2 * big_endian); | |
3519 | Insn insn = nop; | |
3520 | elfcpp::Swap<32, big_endian>::writeval(iview, insn); | |
3521 | r_type = elfcpp::R_POWERPC_NONE; | |
3522 | } | |
3523 | } | |
3524 | } | |
3525 | else if (r_type == elfcpp::R_POWERPC_GOT_DTPREL16 | |
3526 | || r_type == elfcpp::R_POWERPC_GOT_DTPREL16_LO | |
3527 | || r_type == elfcpp::R_POWERPC_GOT_DTPREL16_HI | |
3528 | || r_type == elfcpp::R_POWERPC_GOT_DTPREL16_HA) | |
3529 | { | |
3530 | // Accesses relative to a local dynamic sequence address, | |
3531 | // no optimisation here. | |
3532 | if (gsym != NULL) | |
3533 | { | |
3534 | gold_assert(gsym->has_got_offset(GOT_TYPE_DTPREL)); | |
3535 | value = gsym->got_offset(GOT_TYPE_DTPREL); | |
3536 | } | |
3537 | else | |
3538 | { | |
3539 | unsigned int r_sym = elfcpp::elf_r_sym<size>(rela.get_r_info()); | |
3540 | gold_assert(object->local_has_got_offset(r_sym, GOT_TYPE_DTPREL)); | |
3541 | value = object->local_got_offset(r_sym, GOT_TYPE_DTPREL); | |
3542 | } | |
3543 | value -= target->got_section()->got_base_offset(object); | |
3544 | } | |
3545 | else if (r_type == elfcpp::R_POWERPC_GOT_TPREL16 | |
3546 | || r_type == elfcpp::R_POWERPC_GOT_TPREL16_LO | |
3547 | || r_type == elfcpp::R_POWERPC_GOT_TPREL16_HI | |
3548 | || r_type == elfcpp::R_POWERPC_GOT_TPREL16_HA) | |
3549 | { | |
3550 | // First instruction of initial exec sequence. | |
3551 | const bool final = gsym == NULL || gsym->final_value_is_known(); | |
3552 | const tls::Tls_optimization tls_type = target->optimize_tls_ie(final); | |
3553 | if (tls_type == tls::TLSOPT_NONE) | |
3554 | { | |
3555 | if (gsym != NULL) | |
3556 | { | |
3557 | gold_assert(gsym->has_got_offset(GOT_TYPE_TPREL)); | |
3558 | value = gsym->got_offset(GOT_TYPE_TPREL); | |
3559 | } | |
3560 | else | |
3561 | { | |
3562 | unsigned int r_sym = elfcpp::elf_r_sym<size>(rela.get_r_info()); | |
3563 | gold_assert(object->local_has_got_offset(r_sym, GOT_TYPE_TPREL)); | |
3564 | value = object->local_got_offset(r_sym, GOT_TYPE_TPREL); | |
3565 | } | |
3566 | value -= target->got_section()->got_base_offset(object); | |
3567 | } | |
3568 | else | |
3569 | { | |
3570 | gold_assert(tls_type == tls::TLSOPT_TO_LE); | |
3571 | if (r_type == elfcpp::R_POWERPC_GOT_TPREL16 | |
3572 | || r_type == elfcpp::R_POWERPC_GOT_TPREL16_LO) | |
3573 | { | |
3574 | Insn* iview = reinterpret_cast<Insn*>(view - 2 * big_endian); | |
3575 | Insn insn = elfcpp::Swap<32, big_endian>::readval(iview); | |
3576 | insn &= (1 << 26) - (1 << 21); // extract rt from ld | |
3577 | if (size == 32) | |
3578 | insn |= addis_0_2; | |
3579 | else | |
3580 | insn |= addis_0_13; | |
3581 | elfcpp::Swap<32, big_endian>::writeval(iview, insn); | |
3582 | r_type = elfcpp::R_POWERPC_TPREL16_HA; | |
3583 | value = psymval->value(object, rela.get_r_addend()); | |
3584 | } | |
3585 | else | |
3586 | { | |
3587 | Insn* iview = reinterpret_cast<Insn*>(view - 2 * big_endian); | |
3588 | Insn insn = nop; | |
3589 | elfcpp::Swap<32, big_endian>::writeval(iview, insn); | |
3590 | r_type = elfcpp::R_POWERPC_NONE; | |
3591 | } | |
3592 | } | |
3593 | } | |
3594 | else if ((size == 64 && r_type == elfcpp::R_PPC64_TLSGD) | |
3595 | || (size == 32 && r_type == elfcpp::R_PPC_TLSGD)) | |
3596 | { | |
3597 | // Second instruction of a global dynamic sequence, | |
3598 | // the __tls_get_addr call | |
3599 | this->call_tls_get_addr_ = CALL_EXPECTED; | |
3600 | const bool final = gsym == NULL || gsym->final_value_is_known(); | |
3601 | const tls::Tls_optimization tls_type = target->optimize_tls_gd(final); | |
3602 | if (tls_type != tls::TLSOPT_NONE) | |
3603 | { | |
3604 | if (tls_type == tls::TLSOPT_TO_IE) | |
3605 | { | |
3606 | Insn* iview = reinterpret_cast<Insn*>(view); | |
3607 | Insn insn = add_3_3_13; | |
3608 | if (size == 32) | |
3609 | insn = add_3_3_2; | |
3610 | elfcpp::Swap<32, big_endian>::writeval(iview, insn); | |
3611 | r_type = elfcpp::R_POWERPC_NONE; | |
3612 | } | |
3613 | else | |
3614 | { | |
3615 | Insn* iview = reinterpret_cast<Insn*>(view); | |
3616 | Insn insn = addi_3_3; | |
3617 | elfcpp::Swap<32, big_endian>::writeval(iview, insn); | |
3618 | r_type = elfcpp::R_POWERPC_TPREL16_LO; | |
3619 | view += 2 * big_endian; | |
3620 | value = psymval->value(object, rela.get_r_addend()); | |
3621 | } | |
3622 | this->call_tls_get_addr_ = CALL_SKIP; | |
3623 | } | |
3624 | } | |
3625 | else if ((size == 64 && r_type == elfcpp::R_PPC64_TLSLD) | |
3626 | || (size == 32 && r_type == elfcpp::R_PPC_TLSLD)) | |
3627 | { | |
3628 | // Second instruction of a local dynamic sequence, | |
3629 | // the __tls_get_addr call | |
3630 | this->call_tls_get_addr_ = CALL_EXPECTED; | |
3631 | const tls::Tls_optimization tls_type = target->optimize_tls_ld(); | |
3632 | if (tls_type == tls::TLSOPT_TO_LE) | |
3633 | { | |
3634 | Insn* iview = reinterpret_cast<Insn*>(view); | |
3635 | Insn insn = addi_3_3; | |
3636 | elfcpp::Swap<32, big_endian>::writeval(iview, insn); | |
3637 | this->call_tls_get_addr_ = CALL_SKIP; | |
3638 | r_type = elfcpp::R_POWERPC_TPREL16_LO; | |
3639 | view += 2 * big_endian; | |
7404fe1b | 3640 | value = dtp_offset; |
dd93cd0a AM |
3641 | } |
3642 | } | |
3643 | else if (r_type == elfcpp::R_POWERPC_TLS) | |
3644 | { | |
3645 | // Second instruction of an initial exec sequence | |
3646 | const bool final = gsym == NULL || gsym->final_value_is_known(); | |
3647 | const tls::Tls_optimization tls_type = target->optimize_tls_ie(final); | |
3648 | if (tls_type == tls::TLSOPT_TO_LE) | |
3649 | { | |
3650 | Insn* iview = reinterpret_cast<Insn*>(view); | |
3651 | Insn insn = elfcpp::Swap<32, big_endian>::readval(iview); | |
3652 | unsigned int reg = size == 32 ? 2 : 13; | |
3653 | insn = at_tls_transform(insn, reg); | |
3654 | gold_assert(insn != 0); | |
3655 | elfcpp::Swap<32, big_endian>::writeval(iview, insn); | |
3656 | r_type = elfcpp::R_POWERPC_TPREL16_LO; | |
3657 | view += 2 * big_endian; | |
3658 | value = psymval->value(object, rela.get_r_addend()); | |
3659 | } | |
3660 | } | |
cf43a2fe AM |
3661 | else |
3662 | { | |
dd93cd0a | 3663 | Address addend = 0; |
3ea0a085 | 3664 | unsigned int dest_shndx; |
cf43a2fe AM |
3665 | if (r_type != elfcpp::R_PPC_PLTREL24) |
3666 | addend = rela.get_r_addend(); | |
dd93cd0a AM |
3667 | if (size == 64 || !has_plt_value) |
3668 | value = psymval->value(object, addend); | |
3669 | if (size == 64 && is_branch_reloc(r_type)) | |
3ea0a085 | 3670 | value = target->symval_for_branch(value, gsym, object, &dest_shndx); |
42cacb20 DE |
3671 | } |
3672 | ||
42cacb20 DE |
3673 | switch (r_type) |
3674 | { | |
dd93cd0a AM |
3675 | case elfcpp::R_PPC64_REL64: |
3676 | case elfcpp::R_POWERPC_REL32: | |
3677 | case elfcpp::R_POWERPC_REL24: | |
3678 | case elfcpp::R_PPC_PLTREL24: | |
3679 | case elfcpp::R_PPC_LOCAL24PC: | |
3680 | case elfcpp::R_POWERPC_REL16: | |
3681 | case elfcpp::R_POWERPC_REL16_LO: | |
3682 | case elfcpp::R_POWERPC_REL16_HI: | |
3683 | case elfcpp::R_POWERPC_REL16_HA: | |
3684 | case elfcpp::R_POWERPC_REL14: | |
3685 | case elfcpp::R_POWERPC_REL14_BRTAKEN: | |
3686 | case elfcpp::R_POWERPC_REL14_BRNTAKEN: | |
3687 | value -= address; | |
3688 | break; | |
3689 | ||
42cacb20 DE |
3690 | case elfcpp::R_PPC64_TOC16: |
3691 | case elfcpp::R_PPC64_TOC16_LO: | |
3692 | case elfcpp::R_PPC64_TOC16_HI: | |
3693 | case elfcpp::R_PPC64_TOC16_HA: | |
3694 | case elfcpp::R_PPC64_TOC16_DS: | |
3695 | case elfcpp::R_PPC64_TOC16_LO_DS: | |
cf43a2fe | 3696 | // Subtract the TOC base address. |
c9269dff | 3697 | value -= (target->got_section()->output_section()->address() |
dd93cd0a | 3698 | + object->toc_base_offset()); |
42cacb20 DE |
3699 | break; |
3700 | ||
cf43a2fe AM |
3701 | case elfcpp::R_POWERPC_SECTOFF: |
3702 | case elfcpp::R_POWERPC_SECTOFF_LO: | |
3703 | case elfcpp::R_POWERPC_SECTOFF_HI: | |
3704 | case elfcpp::R_POWERPC_SECTOFF_HA: | |
3705 | case elfcpp::R_PPC64_SECTOFF_DS: | |
3706 | case elfcpp::R_PPC64_SECTOFF_LO_DS: | |
3707 | if (os != NULL) | |
3708 | value -= os->address(); | |
42cacb20 DE |
3709 | break; |
3710 | ||
dd93cd0a AM |
3711 | case elfcpp::R_PPC64_TPREL16_DS: |
3712 | case elfcpp::R_PPC64_TPREL16_LO_DS: | |
3713 | if (size != 64) | |
3714 | // R_PPC_TLSGD and R_PPC_TLSLD | |
3715 | break; | |
3716 | case elfcpp::R_POWERPC_TPREL16: | |
3717 | case elfcpp::R_POWERPC_TPREL16_LO: | |
3718 | case elfcpp::R_POWERPC_TPREL16_HI: | |
3719 | case elfcpp::R_POWERPC_TPREL16_HA: | |
3720 | case elfcpp::R_POWERPC_TPREL: | |
3721 | case elfcpp::R_PPC64_TPREL16_HIGHER: | |
3722 | case elfcpp::R_PPC64_TPREL16_HIGHERA: | |
3723 | case elfcpp::R_PPC64_TPREL16_HIGHEST: | |
3724 | case elfcpp::R_PPC64_TPREL16_HIGHESTA: | |
3725 | // tls symbol values are relative to tls_segment()->vaddr() | |
3726 | value -= tp_offset; | |
3727 | break; | |
3728 | ||
3729 | case elfcpp::R_PPC64_DTPREL16_DS: | |
3730 | case elfcpp::R_PPC64_DTPREL16_LO_DS: | |
3731 | case elfcpp::R_PPC64_DTPREL16_HIGHER: | |
3732 | case elfcpp::R_PPC64_DTPREL16_HIGHERA: | |
3733 | case elfcpp::R_PPC64_DTPREL16_HIGHEST: | |
3734 | case elfcpp::R_PPC64_DTPREL16_HIGHESTA: | |
3735 | if (size != 64) | |
3736 | // R_PPC_EMB_NADDR32, R_PPC_EMB_NADDR16, R_PPC_EMB_NADDR16_LO | |
3737 | // R_PPC_EMB_NADDR16_HI, R_PPC_EMB_NADDR16_HA, R_PPC_EMB_SDAI16 | |
3738 | break; | |
3739 | case elfcpp::R_POWERPC_DTPREL16: | |
3740 | case elfcpp::R_POWERPC_DTPREL16_LO: | |
3741 | case elfcpp::R_POWERPC_DTPREL16_HI: | |
3742 | case elfcpp::R_POWERPC_DTPREL16_HA: | |
3743 | case elfcpp::R_POWERPC_DTPREL: | |
3744 | // tls symbol values are relative to tls_segment()->vaddr() | |
3745 | value -= dtp_offset; | |
3746 | break; | |
3747 | ||
42cacb20 DE |
3748 | default: |
3749 | break; | |
3750 | } | |
3751 | ||
dd93cd0a | 3752 | Insn branch_bit = 0; |
42cacb20 DE |
3753 | switch (r_type) |
3754 | { | |
dd93cd0a AM |
3755 | case elfcpp::R_POWERPC_ADDR14_BRTAKEN: |
3756 | case elfcpp::R_POWERPC_REL14_BRTAKEN: | |
3757 | branch_bit = 1 << 21; | |
3758 | case elfcpp::R_POWERPC_ADDR14_BRNTAKEN: | |
3759 | case elfcpp::R_POWERPC_REL14_BRNTAKEN: | |
3760 | { | |
3761 | Insn* iview = reinterpret_cast<Insn*>(view); | |
3762 | Insn insn = elfcpp::Swap<32, big_endian>::readval(iview); | |
3763 | insn &= ~(1 << 21); | |
3764 | insn |= branch_bit; | |
3765 | if (this->is_isa_v2) | |
3766 | { | |
3767 | // Set 'a' bit. This is 0b00010 in BO field for branch | |
3768 | // on CR(BI) insns (BO == 001at or 011at), and 0b01000 | |
3769 | // for branch on CTR insns (BO == 1a00t or 1a01t). | |
3770 | if ((insn & (0x14 << 21)) == (0x04 << 21)) | |
3771 | insn |= 0x02 << 21; | |
3772 | else if ((insn & (0x14 << 21)) == (0x10 << 21)) | |
3773 | insn |= 0x08 << 21; | |
3774 | else | |
3775 | break; | |
3776 | } | |
3777 | else | |
3778 | { | |
3779 | // Invert 'y' bit if not the default. | |
3780 | if (static_cast<Signed_address>(value) < 0) | |
3781 | insn ^= 1 << 21; | |
3782 | } | |
3783 | elfcpp::Swap<32, big_endian>::writeval(iview, insn); | |
3784 | } | |
3785 | break; | |
3786 | ||
3787 | default: | |
3788 | break; | |
3789 | } | |
3790 | ||
f4baf0d4 | 3791 | typename Reloc::Overflow_check overflow = Reloc::CHECK_NONE; |
dd93cd0a AM |
3792 | switch (r_type) |
3793 | { | |
3794 | case elfcpp::R_POWERPC_ADDR32: | |
3795 | case elfcpp::R_POWERPC_UADDR32: | |
3796 | if (size == 64) | |
f4baf0d4 | 3797 | overflow = Reloc::CHECK_BITFIELD; |
42cacb20 DE |
3798 | break; |
3799 | ||
3800 | case elfcpp::R_POWERPC_REL32: | |
dd93cd0a | 3801 | if (size == 64) |
f4baf0d4 | 3802 | overflow = Reloc::CHECK_SIGNED; |
dd93cd0a AM |
3803 | break; |
3804 | ||
3805 | case elfcpp::R_POWERPC_ADDR24: | |
3806 | case elfcpp::R_POWERPC_ADDR16: | |
3807 | case elfcpp::R_POWERPC_UADDR16: | |
3808 | case elfcpp::R_PPC64_ADDR16_DS: | |
3809 | case elfcpp::R_POWERPC_ADDR14: | |
3810 | case elfcpp::R_POWERPC_ADDR14_BRTAKEN: | |
3811 | case elfcpp::R_POWERPC_ADDR14_BRNTAKEN: | |
f4baf0d4 | 3812 | overflow = Reloc::CHECK_BITFIELD; |
42cacb20 DE |
3813 | break; |
3814 | ||
3815 | case elfcpp::R_POWERPC_REL24: | |
42cacb20 | 3816 | case elfcpp::R_PPC_PLTREL24: |
cf43a2fe | 3817 | case elfcpp::R_PPC_LOCAL24PC: |
dd93cd0a AM |
3818 | case elfcpp::R_POWERPC_REL16: |
3819 | case elfcpp::R_PPC64_TOC16: | |
3820 | case elfcpp::R_POWERPC_GOT16: | |
3821 | case elfcpp::R_POWERPC_SECTOFF: | |
3822 | case elfcpp::R_POWERPC_TPREL16: | |
3823 | case elfcpp::R_POWERPC_DTPREL16: | |
3824 | case elfcpp::R_PPC64_TPREL16_DS: | |
3825 | case elfcpp::R_PPC64_DTPREL16_DS: | |
3826 | case elfcpp::R_PPC64_TOC16_DS: | |
3827 | case elfcpp::R_PPC64_GOT16_DS: | |
3828 | case elfcpp::R_PPC64_SECTOFF_DS: | |
3829 | case elfcpp::R_POWERPC_REL14: | |
3830 | case elfcpp::R_POWERPC_REL14_BRTAKEN: | |
3831 | case elfcpp::R_POWERPC_REL14_BRNTAKEN: | |
3832 | case elfcpp::R_POWERPC_GOT_TLSGD16: | |
3833 | case elfcpp::R_POWERPC_GOT_TLSLD16: | |
3834 | case elfcpp::R_POWERPC_GOT_TPREL16: | |
3835 | case elfcpp::R_POWERPC_GOT_DTPREL16: | |
f4baf0d4 | 3836 | overflow = Reloc::CHECK_SIGNED; |
42cacb20 | 3837 | break; |
dd93cd0a | 3838 | } |
42cacb20 | 3839 | |
3ea0a085 | 3840 | typename Powerpc_relocate_functions<size, big_endian>::Status status |
f4baf0d4 | 3841 | = Powerpc_relocate_functions<size, big_endian>::STATUS_OK; |
dd93cd0a AM |
3842 | switch (r_type) |
3843 | { | |
3844 | case elfcpp::R_POWERPC_NONE: | |
3845 | case elfcpp::R_POWERPC_TLS: | |
3846 | case elfcpp::R_POWERPC_GNU_VTINHERIT: | |
3847 | case elfcpp::R_POWERPC_GNU_VTENTRY: | |
3848 | case elfcpp::R_PPC_EMB_MRKREF: | |
42cacb20 DE |
3849 | break; |
3850 | ||
3851 | case elfcpp::R_PPC64_ADDR64: | |
dd93cd0a | 3852 | case elfcpp::R_PPC64_REL64: |
cf43a2fe | 3853 | case elfcpp::R_PPC64_TOC: |
dd93cd0a AM |
3854 | Reloc::addr64(view, value); |
3855 | break; | |
3856 | ||
3857 | case elfcpp::R_POWERPC_TPREL: | |
3858 | case elfcpp::R_POWERPC_DTPREL: | |
3859 | if (size == 64) | |
3860 | Reloc::addr64(view, value); | |
3861 | else | |
3ea0a085 | 3862 | status = Reloc::addr32(view, value, overflow); |
dd93cd0a AM |
3863 | break; |
3864 | ||
3865 | case elfcpp::R_PPC64_UADDR64: | |
3866 | Reloc::addr64_u(view, value); | |
42cacb20 DE |
3867 | break; |
3868 | ||
3869 | case elfcpp::R_POWERPC_ADDR32: | |
dd93cd0a | 3870 | case elfcpp::R_POWERPC_REL32: |
3ea0a085 | 3871 | status = Reloc::addr32(view, value, overflow); |
dd93cd0a AM |
3872 | break; |
3873 | ||
3874 | case elfcpp::R_POWERPC_UADDR32: | |
3ea0a085 | 3875 | status = Reloc::addr32_u(view, value, overflow); |
dd93cd0a AM |
3876 | break; |
3877 | ||
3878 | case elfcpp::R_POWERPC_ADDR24: | |
3879 | case elfcpp::R_POWERPC_REL24: | |
3880 | case elfcpp::R_PPC_PLTREL24: | |
3881 | case elfcpp::R_PPC_LOCAL24PC: | |
3ea0a085 | 3882 | status = Reloc::addr24(view, value, overflow); |
42cacb20 DE |
3883 | break; |
3884 | ||
dd93cd0a AM |
3885 | case elfcpp::R_POWERPC_GOT_DTPREL16: |
3886 | case elfcpp::R_POWERPC_GOT_DTPREL16_LO: | |
3887 | if (size == 64) | |
3888 | { | |
3ea0a085 | 3889 | status = Reloc::addr16_ds(view, value, overflow); |
dd93cd0a AM |
3890 | break; |
3891 | } | |
cf43a2fe | 3892 | case elfcpp::R_POWERPC_ADDR16: |
dd93cd0a | 3893 | case elfcpp::R_POWERPC_REL16: |
cf43a2fe | 3894 | case elfcpp::R_PPC64_TOC16: |
42cacb20 | 3895 | case elfcpp::R_POWERPC_GOT16: |
cf43a2fe | 3896 | case elfcpp::R_POWERPC_SECTOFF: |
dd93cd0a AM |
3897 | case elfcpp::R_POWERPC_TPREL16: |
3898 | case elfcpp::R_POWERPC_DTPREL16: | |
3899 | case elfcpp::R_POWERPC_GOT_TLSGD16: | |
3900 | case elfcpp::R_POWERPC_GOT_TLSLD16: | |
3901 | case elfcpp::R_POWERPC_GOT_TPREL16: | |
cf43a2fe | 3902 | case elfcpp::R_POWERPC_ADDR16_LO: |
dd93cd0a | 3903 | case elfcpp::R_POWERPC_REL16_LO: |
cf43a2fe | 3904 | case elfcpp::R_PPC64_TOC16_LO: |
42cacb20 | 3905 | case elfcpp::R_POWERPC_GOT16_LO: |
cf43a2fe | 3906 | case elfcpp::R_POWERPC_SECTOFF_LO: |
dd93cd0a AM |
3907 | case elfcpp::R_POWERPC_TPREL16_LO: |
3908 | case elfcpp::R_POWERPC_DTPREL16_LO: | |
3909 | case elfcpp::R_POWERPC_GOT_TLSGD16_LO: | |
3910 | case elfcpp::R_POWERPC_GOT_TLSLD16_LO: | |
3911 | case elfcpp::R_POWERPC_GOT_TPREL16_LO: | |
3ea0a085 | 3912 | status = Reloc::addr16(view, value, overflow); |
dd93cd0a AM |
3913 | break; |
3914 | ||
3915 | case elfcpp::R_POWERPC_UADDR16: | |
3ea0a085 | 3916 | status = Reloc::addr16_u(view, value, overflow); |
42cacb20 DE |
3917 | break; |
3918 | ||
cf43a2fe | 3919 | case elfcpp::R_POWERPC_ADDR16_HI: |
dd93cd0a | 3920 | case elfcpp::R_POWERPC_REL16_HI: |
cf43a2fe | 3921 | case elfcpp::R_PPC64_TOC16_HI: |
42cacb20 | 3922 | case elfcpp::R_POWERPC_GOT16_HI: |
cf43a2fe | 3923 | case elfcpp::R_POWERPC_SECTOFF_HI: |
dd93cd0a AM |
3924 | case elfcpp::R_POWERPC_TPREL16_HI: |
3925 | case elfcpp::R_POWERPC_DTPREL16_HI: | |
3926 | case elfcpp::R_POWERPC_GOT_TLSGD16_HI: | |
3927 | case elfcpp::R_POWERPC_GOT_TLSLD16_HI: | |
3928 | case elfcpp::R_POWERPC_GOT_TPREL16_HI: | |
3929 | case elfcpp::R_POWERPC_GOT_DTPREL16_HI: | |
3930 | Reloc::addr16_hi(view, value); | |
42cacb20 DE |
3931 | break; |
3932 | ||
cf43a2fe | 3933 | case elfcpp::R_POWERPC_ADDR16_HA: |
dd93cd0a | 3934 | case elfcpp::R_POWERPC_REL16_HA: |
cf43a2fe | 3935 | case elfcpp::R_PPC64_TOC16_HA: |
42cacb20 | 3936 | case elfcpp::R_POWERPC_GOT16_HA: |
cf43a2fe | 3937 | case elfcpp::R_POWERPC_SECTOFF_HA: |
dd93cd0a AM |
3938 | case elfcpp::R_POWERPC_TPREL16_HA: |
3939 | case elfcpp::R_POWERPC_DTPREL16_HA: | |
3940 | case elfcpp::R_POWERPC_GOT_TLSGD16_HA: | |
3941 | case elfcpp::R_POWERPC_GOT_TLSLD16_HA: | |
3942 | case elfcpp::R_POWERPC_GOT_TPREL16_HA: | |
3943 | case elfcpp::R_POWERPC_GOT_DTPREL16_HA: | |
3944 | Reloc::addr16_ha(view, value); | |
42cacb20 DE |
3945 | break; |
3946 | ||
dd93cd0a AM |
3947 | case elfcpp::R_PPC64_DTPREL16_HIGHER: |
3948 | if (size == 32) | |
3949 | // R_PPC_EMB_NADDR16_LO | |
3950 | goto unsupp; | |
3951 | case elfcpp::R_PPC64_ADDR16_HIGHER: | |
3952 | case elfcpp::R_PPC64_TPREL16_HIGHER: | |
3953 | Reloc::addr16_hi2(view, value); | |
42cacb20 DE |
3954 | break; |
3955 | ||
dd93cd0a AM |
3956 | case elfcpp::R_PPC64_DTPREL16_HIGHERA: |
3957 | if (size == 32) | |
3958 | // R_PPC_EMB_NADDR16_HI | |
3959 | goto unsupp; | |
3960 | case elfcpp::R_PPC64_ADDR16_HIGHERA: | |
3961 | case elfcpp::R_PPC64_TPREL16_HIGHERA: | |
3962 | Reloc::addr16_ha2(view, value); | |
42cacb20 DE |
3963 | break; |
3964 | ||
dd93cd0a AM |
3965 | case elfcpp::R_PPC64_DTPREL16_HIGHEST: |
3966 | if (size == 32) | |
3967 | // R_PPC_EMB_NADDR16_HA | |
3968 | goto unsupp; | |
3969 | case elfcpp::R_PPC64_ADDR16_HIGHEST: | |
3970 | case elfcpp::R_PPC64_TPREL16_HIGHEST: | |
3971 | Reloc::addr16_hi3(view, value); | |
42cacb20 DE |
3972 | break; |
3973 | ||
dd93cd0a AM |
3974 | case elfcpp::R_PPC64_DTPREL16_HIGHESTA: |
3975 | if (size == 32) | |
3976 | // R_PPC_EMB_SDAI16 | |
3977 | goto unsupp; | |
3978 | case elfcpp::R_PPC64_ADDR16_HIGHESTA: | |
3979 | case elfcpp::R_PPC64_TPREL16_HIGHESTA: | |
3980 | Reloc::addr16_ha3(view, value); | |
3981 | break; | |
3982 | ||
3983 | case elfcpp::R_PPC64_DTPREL16_DS: | |
3984 | case elfcpp::R_PPC64_DTPREL16_LO_DS: | |
3985 | if (size == 32) | |
3986 | // R_PPC_EMB_NADDR32, R_PPC_EMB_NADDR16 | |
3987 | goto unsupp; | |
3988 | case elfcpp::R_PPC64_TPREL16_DS: | |
3989 | case elfcpp::R_PPC64_TPREL16_LO_DS: | |
3990 | if (size == 32) | |
3991 | // R_PPC_TLSGD, R_PPC_TLSLD | |
3992 | break; | |
cf43a2fe AM |
3993 | case elfcpp::R_PPC64_ADDR16_DS: |
3994 | case elfcpp::R_PPC64_ADDR16_LO_DS: | |
42cacb20 DE |
3995 | case elfcpp::R_PPC64_TOC16_DS: |
3996 | case elfcpp::R_PPC64_TOC16_LO_DS: | |
cf43a2fe AM |
3997 | case elfcpp::R_PPC64_GOT16_DS: |
3998 | case elfcpp::R_PPC64_GOT16_LO_DS: | |
3999 | case elfcpp::R_PPC64_SECTOFF_DS: | |
4000 | case elfcpp::R_PPC64_SECTOFF_LO_DS: | |
3ea0a085 | 4001 | status = Reloc::addr16_ds(view, value, overflow); |
dd93cd0a AM |
4002 | break; |
4003 | ||
4004 | case elfcpp::R_POWERPC_ADDR14: | |
4005 | case elfcpp::R_POWERPC_ADDR14_BRTAKEN: | |
4006 | case elfcpp::R_POWERPC_ADDR14_BRNTAKEN: | |
4007 | case elfcpp::R_POWERPC_REL14: | |
4008 | case elfcpp::R_POWERPC_REL14_BRTAKEN: | |
4009 | case elfcpp::R_POWERPC_REL14_BRNTAKEN: | |
3ea0a085 | 4010 | status = Reloc::addr14(view, value, overflow); |
42cacb20 DE |
4011 | break; |
4012 | ||
4013 | case elfcpp::R_POWERPC_COPY: | |
4014 | case elfcpp::R_POWERPC_GLOB_DAT: | |
4015 | case elfcpp::R_POWERPC_JMP_SLOT: | |
4016 | case elfcpp::R_POWERPC_RELATIVE: | |
42cacb20 | 4017 | case elfcpp::R_POWERPC_DTPMOD: |
dd93cd0a AM |
4018 | case elfcpp::R_PPC64_JMP_IREL: |
4019 | case elfcpp::R_POWERPC_IRELATIVE: | |
42cacb20 DE |
4020 | gold_error_at_location(relinfo, relnum, rela.get_r_offset(), |
4021 | _("unexpected reloc %u in object file"), | |
4022 | r_type); | |
4023 | break; | |
4024 | ||
dd93cd0a AM |
4025 | case elfcpp::R_PPC_EMB_SDA21: |
4026 | if (size == 32) | |
4027 | goto unsupp; | |
4028 | else | |
4029 | { | |
4030 | // R_PPC64_TOCSAVE. For the time being this can be ignored. | |
4031 | } | |
4032 | break; | |
4033 | ||
4034 | case elfcpp::R_PPC_EMB_SDA2I16: | |
4035 | case elfcpp::R_PPC_EMB_SDA2REL: | |
4036 | if (size == 32) | |
4037 | goto unsupp; | |
4038 | // R_PPC64_TLSGD, R_PPC64_TLSLD | |
6ce78956 AM |
4039 | break; |
4040 | ||
dd93cd0a AM |
4041 | case elfcpp::R_POWERPC_PLT32: |
4042 | case elfcpp::R_POWERPC_PLTREL32: | |
4043 | case elfcpp::R_POWERPC_PLT16_LO: | |
4044 | case elfcpp::R_POWERPC_PLT16_HI: | |
4045 | case elfcpp::R_POWERPC_PLT16_HA: | |
4046 | case elfcpp::R_PPC_SDAREL16: | |
4047 | case elfcpp::R_POWERPC_ADDR30: | |
4048 | case elfcpp::R_PPC64_PLT64: | |
4049 | case elfcpp::R_PPC64_PLTREL64: | |
4050 | case elfcpp::R_PPC64_PLTGOT16: | |
4051 | case elfcpp::R_PPC64_PLTGOT16_LO: | |
4052 | case elfcpp::R_PPC64_PLTGOT16_HI: | |
4053 | case elfcpp::R_PPC64_PLTGOT16_HA: | |
4054 | case elfcpp::R_PPC64_PLT16_LO_DS: | |
4055 | case elfcpp::R_PPC64_PLTGOT16_DS: | |
4056 | case elfcpp::R_PPC64_PLTGOT16_LO_DS: | |
4057 | case elfcpp::R_PPC_EMB_RELSEC16: | |
4058 | case elfcpp::R_PPC_EMB_RELST_LO: | |
4059 | case elfcpp::R_PPC_EMB_RELST_HI: | |
4060 | case elfcpp::R_PPC_EMB_RELST_HA: | |
4061 | case elfcpp::R_PPC_EMB_BIT_FLD: | |
4062 | case elfcpp::R_PPC_EMB_RELSDA: | |
4063 | case elfcpp::R_PPC_TOC16: | |
42cacb20 | 4064 | default: |
dd93cd0a | 4065 | unsupp: |
42cacb20 DE |
4066 | gold_error_at_location(relinfo, relnum, rela.get_r_offset(), |
4067 | _("unsupported reloc %u"), | |
4068 | r_type); | |
4069 | break; | |
4070 | } | |
f4baf0d4 | 4071 | if (status != Powerpc_relocate_functions<size, big_endian>::STATUS_OK) |
3ea0a085 AM |
4072 | gold_error_at_location(relinfo, relnum, rela.get_r_offset(), |
4073 | _("relocation overflow")); | |
42cacb20 DE |
4074 | |
4075 | return true; | |
4076 | } | |
4077 | ||
42cacb20 DE |
4078 | // Relocate section data. |
4079 | ||
4080 | template<int size, bool big_endian> | |
4081 | void | |
4082 | Target_powerpc<size, big_endian>::relocate_section( | |
d83ce4e3 AM |
4083 | const Relocate_info<size, big_endian>* relinfo, |
4084 | unsigned int sh_type, | |
4085 | const unsigned char* prelocs, | |
4086 | size_t reloc_count, | |
4087 | Output_section* output_section, | |
4088 | bool needs_special_offset_handling, | |
4089 | unsigned char* view, | |
c9269dff | 4090 | Address address, |
d83ce4e3 AM |
4091 | section_size_type view_size, |
4092 | const Reloc_symbol_changes* reloc_symbol_changes) | |
42cacb20 DE |
4093 | { |
4094 | typedef Target_powerpc<size, big_endian> Powerpc; | |
4095 | typedef typename Target_powerpc<size, big_endian>::Relocate Powerpc_relocate; | |
4096 | ||
4097 | gold_assert(sh_type == elfcpp::SHT_RELA); | |
4098 | ||
bfdfa4cd AM |
4099 | unsigned char *opd_rel = NULL; |
4100 | Powerpc_relobj<size, big_endian>* const object | |
4101 | = static_cast<Powerpc_relobj<size, big_endian>*>(relinfo->object); | |
4102 | if (size == 64 | |
4103 | && relinfo->data_shndx == object->opd_shndx()) | |
4104 | { | |
4105 | // Rewrite opd relocs, omitting those for discarded sections | |
4106 | // to silence gold::relocate_section errors. | |
4107 | const int reloc_size | |
4108 | = Reloc_types<elfcpp::SHT_RELA, size, big_endian>::reloc_size; | |
4109 | opd_rel = new unsigned char[reloc_count * reloc_size]; | |
4110 | const unsigned char* rrel = prelocs; | |
4111 | unsigned char* wrel = opd_rel; | |
4112 | ||
4113 | for (size_t i = 0; | |
4114 | i < reloc_count; | |
4115 | ++i, rrel += reloc_size, wrel += reloc_size) | |
4116 | { | |
4117 | typename Reloc_types<elfcpp::SHT_RELA, size, big_endian>::Reloc | |
4118 | reloc(rrel); | |
4119 | typename elfcpp::Elf_types<size>::Elf_WXword r_info | |
4120 | = reloc.get_r_info(); | |
4121 | unsigned int r_type = elfcpp::elf_r_type<size>(r_info); | |
4122 | Address r_off = reloc.get_r_offset(); | |
4123 | if (r_type == elfcpp::R_PPC64_TOC) | |
4124 | r_off -= 8; | |
4125 | bool is_discarded = object->get_opd_discard(r_off); | |
4126 | ||
4127 | // Reloc number is reported in some errors, so keep all relocs. | |
4128 | if (is_discarded) | |
4129 | memset(wrel, 0, reloc_size); | |
4130 | else | |
4131 | memcpy(wrel, rrel, reloc_size); | |
4132 | } | |
4133 | prelocs = opd_rel; | |
4134 | } | |
4135 | ||
42cacb20 | 4136 | gold::relocate_section<size, big_endian, Powerpc, elfcpp::SHT_RELA, |
d83ce4e3 | 4137 | Powerpc_relocate>( |
42cacb20 DE |
4138 | relinfo, |
4139 | this, | |
4140 | prelocs, | |
4141 | reloc_count, | |
4142 | output_section, | |
4143 | needs_special_offset_handling, | |
4144 | view, | |
4145 | address, | |
364c7fa5 ILT |
4146 | view_size, |
4147 | reloc_symbol_changes); | |
bfdfa4cd AM |
4148 | |
4149 | if (opd_rel != NULL) | |
4150 | delete[] opd_rel; | |
42cacb20 DE |
4151 | } |
4152 | ||
cf43a2fe | 4153 | class Powerpc_scan_relocatable_reloc |
42cacb20 | 4154 | { |
cf43a2fe AM |
4155 | public: |
4156 | // Return the strategy to use for a local symbol which is not a | |
4157 | // section symbol, given the relocation type. | |
4158 | inline Relocatable_relocs::Reloc_strategy | |
4159 | local_non_section_strategy(unsigned int r_type, Relobj*, unsigned int r_sym) | |
4160 | { | |
4161 | if (r_type == 0 && r_sym == 0) | |
4162 | return Relocatable_relocs::RELOC_DISCARD; | |
4163 | return Relocatable_relocs::RELOC_COPY; | |
4164 | } | |
4165 | ||
4166 | // Return the strategy to use for a local symbol which is a section | |
4167 | // symbol, given the relocation type. | |
4168 | inline Relocatable_relocs::Reloc_strategy | |
4169 | local_section_strategy(unsigned int, Relobj*) | |
4170 | { | |
4171 | return Relocatable_relocs::RELOC_ADJUST_FOR_SECTION_RELA; | |
4172 | } | |
4173 | ||
4174 | // Return the strategy to use for a global symbol, given the | |
4175 | // relocation type, the object, and the symbol index. | |
4176 | inline Relocatable_relocs::Reloc_strategy | |
4177 | global_strategy(unsigned int r_type, Relobj*, unsigned int) | |
4178 | { | |
4179 | if (r_type == elfcpp::R_PPC_PLTREL24) | |
4180 | return Relocatable_relocs::RELOC_SPECIAL; | |
4181 | return Relocatable_relocs::RELOC_COPY; | |
4182 | } | |
4183 | }; | |
42cacb20 DE |
4184 | |
4185 | // Scan the relocs during a relocatable link. | |
4186 | ||
4187 | template<int size, bool big_endian> | |
4188 | void | |
4189 | Target_powerpc<size, big_endian>::scan_relocatable_relocs( | |
d83ce4e3 AM |
4190 | Symbol_table* symtab, |
4191 | Layout* layout, | |
4192 | Sized_relobj_file<size, big_endian>* object, | |
4193 | unsigned int data_shndx, | |
4194 | unsigned int sh_type, | |
4195 | const unsigned char* prelocs, | |
4196 | size_t reloc_count, | |
4197 | Output_section* output_section, | |
4198 | bool needs_special_offset_handling, | |
4199 | size_t local_symbol_count, | |
4200 | const unsigned char* plocal_symbols, | |
4201 | Relocatable_relocs* rr) | |
42cacb20 DE |
4202 | { |
4203 | gold_assert(sh_type == elfcpp::SHT_RELA); | |
4204 | ||
42cacb20 | 4205 | gold::scan_relocatable_relocs<size, big_endian, elfcpp::SHT_RELA, |
d83ce4e3 | 4206 | Powerpc_scan_relocatable_reloc>( |
42cacb20 DE |
4207 | symtab, |
4208 | layout, | |
4209 | object, | |
4210 | data_shndx, | |
4211 | prelocs, | |
4212 | reloc_count, | |
4213 | output_section, | |
4214 | needs_special_offset_handling, | |
4215 | local_symbol_count, | |
4216 | plocal_symbols, | |
4217 | rr); | |
4218 | } | |
4219 | ||
7404fe1b | 4220 | // Emit relocations for a section. |
dd93cd0a AM |
4221 | // This is a modified version of the function by the same name in |
4222 | // target-reloc.h. Using relocate_special_relocatable for | |
4223 | // R_PPC_PLTREL24 would require duplication of the entire body of the | |
4224 | // loop, so we may as well duplicate the whole thing. | |
42cacb20 DE |
4225 | |
4226 | template<int size, bool big_endian> | |
4227 | void | |
7404fe1b | 4228 | Target_powerpc<size, big_endian>::relocate_relocs( |
42cacb20 DE |
4229 | const Relocate_info<size, big_endian>* relinfo, |
4230 | unsigned int sh_type, | |
4231 | const unsigned char* prelocs, | |
4232 | size_t reloc_count, | |
4233 | Output_section* output_section, | |
4234 | off_t offset_in_output_section, | |
4235 | const Relocatable_relocs* rr, | |
cf43a2fe | 4236 | unsigned char*, |
dd93cd0a | 4237 | Address view_address, |
cf43a2fe | 4238 | section_size_type, |
42cacb20 DE |
4239 | unsigned char* reloc_view, |
4240 | section_size_type reloc_view_size) | |
4241 | { | |
4242 | gold_assert(sh_type == elfcpp::SHT_RELA); | |
4243 | ||
cf43a2fe AM |
4244 | typedef typename Reloc_types<elfcpp::SHT_RELA, size, big_endian>::Reloc |
4245 | Reltype; | |
4246 | typedef typename Reloc_types<elfcpp::SHT_RELA, size, big_endian>::Reloc_write | |
4247 | Reltype_write; | |
4248 | const int reloc_size | |
4249 | = Reloc_types<elfcpp::SHT_RELA, size, big_endian>::reloc_size; | |
cf43a2fe AM |
4250 | |
4251 | Powerpc_relobj<size, big_endian>* const object | |
4252 | = static_cast<Powerpc_relobj<size, big_endian>*>(relinfo->object); | |
4253 | const unsigned int local_count = object->local_symbol_count(); | |
4254 | unsigned int got2_shndx = object->got2_shndx(); | |
c9269dff | 4255 | Address got2_addend = 0; |
cf43a2fe | 4256 | if (got2_shndx != 0) |
c9269dff AM |
4257 | { |
4258 | got2_addend = object->get_output_section_offset(got2_shndx); | |
4259 | gold_assert(got2_addend != invalid_address); | |
4260 | } | |
cf43a2fe AM |
4261 | |
4262 | unsigned char* pwrite = reloc_view; | |
7404fe1b | 4263 | bool zap_next = false; |
cf43a2fe AM |
4264 | for (size_t i = 0; i < reloc_count; ++i, prelocs += reloc_size) |
4265 | { | |
4266 | Relocatable_relocs::Reloc_strategy strategy = rr->strategy(i); | |
4267 | if (strategy == Relocatable_relocs::RELOC_DISCARD) | |
4268 | continue; | |
4269 | ||
4270 | Reltype reloc(prelocs); | |
4271 | Reltype_write reloc_write(pwrite); | |
4272 | ||
7404fe1b | 4273 | Address offset = reloc.get_r_offset(); |
cf43a2fe | 4274 | typename elfcpp::Elf_types<size>::Elf_WXword r_info = reloc.get_r_info(); |
7404fe1b AM |
4275 | unsigned int r_sym = elfcpp::elf_r_sym<size>(r_info); |
4276 | unsigned int r_type = elfcpp::elf_r_type<size>(r_info); | |
4277 | const unsigned int orig_r_sym = r_sym; | |
4278 | typename elfcpp::Elf_types<size>::Elf_Swxword addend | |
4279 | = reloc.get_r_addend(); | |
4280 | const Symbol* gsym = NULL; | |
4281 | ||
4282 | if (zap_next) | |
4283 | { | |
4284 | // We could arrange to discard these and other relocs for | |
4285 | // tls optimised sequences in the strategy methods, but for | |
4286 | // now do as BFD ld does. | |
4287 | r_type = elfcpp::R_POWERPC_NONE; | |
4288 | zap_next = false; | |
4289 | } | |
cf43a2fe AM |
4290 | |
4291 | // Get the new symbol index. | |
cf43a2fe AM |
4292 | if (r_sym < local_count) |
4293 | { | |
4294 | switch (strategy) | |
4295 | { | |
4296 | case Relocatable_relocs::RELOC_COPY: | |
4297 | case Relocatable_relocs::RELOC_SPECIAL: | |
7404fe1b | 4298 | if (r_sym != 0) |
dd93cd0a | 4299 | { |
7404fe1b AM |
4300 | r_sym = object->symtab_index(r_sym); |
4301 | gold_assert(r_sym != -1U); | |
dd93cd0a | 4302 | } |
cf43a2fe AM |
4303 | break; |
4304 | ||
4305 | case Relocatable_relocs::RELOC_ADJUST_FOR_SECTION_RELA: | |
4306 | { | |
4307 | // We are adjusting a section symbol. We need to find | |
4308 | // the symbol table index of the section symbol for | |
4309 | // the output section corresponding to input section | |
4310 | // in which this symbol is defined. | |
4311 | gold_assert(r_sym < local_count); | |
4312 | bool is_ordinary; | |
4313 | unsigned int shndx = | |
4314 | object->local_symbol_input_shndx(r_sym, &is_ordinary); | |
4315 | gold_assert(is_ordinary); | |
4316 | Output_section* os = object->output_section(shndx); | |
4317 | gold_assert(os != NULL); | |
4318 | gold_assert(os->needs_symtab_index()); | |
7404fe1b | 4319 | r_sym = os->symtab_index(); |
cf43a2fe AM |
4320 | } |
4321 | break; | |
4322 | ||
4323 | default: | |
4324 | gold_unreachable(); | |
4325 | } | |
4326 | } | |
4327 | else | |
4328 | { | |
7404fe1b | 4329 | gsym = object->global_symbol(r_sym); |
cf43a2fe AM |
4330 | gold_assert(gsym != NULL); |
4331 | if (gsym->is_forwarder()) | |
4332 | gsym = relinfo->symtab->resolve_forwards(gsym); | |
4333 | ||
4334 | gold_assert(gsym->has_symtab_index()); | |
7404fe1b | 4335 | r_sym = gsym->symtab_index(); |
cf43a2fe AM |
4336 | } |
4337 | ||
4338 | // Get the new offset--the location in the output section where | |
4339 | // this relocation should be applied. | |
cf43a2fe | 4340 | if (static_cast<Address>(offset_in_output_section) != invalid_address) |
7404fe1b | 4341 | offset += offset_in_output_section; |
cf43a2fe AM |
4342 | else |
4343 | { | |
c9269dff AM |
4344 | section_offset_type sot_offset = |
4345 | convert_types<section_offset_type, Address>(offset); | |
cf43a2fe | 4346 | section_offset_type new_sot_offset = |
c9269dff AM |
4347 | output_section->output_offset(object, relinfo->data_shndx, |
4348 | sot_offset); | |
cf43a2fe | 4349 | gold_assert(new_sot_offset != -1); |
7404fe1b | 4350 | offset = new_sot_offset; |
cf43a2fe AM |
4351 | } |
4352 | ||
dd93cd0a AM |
4353 | // In an object file, r_offset is an offset within the section. |
4354 | // In an executable or dynamic object, generated by | |
4355 | // --emit-relocs, r_offset is an absolute address. | |
7404fe1b | 4356 | if (!parameters->options().relocatable()) |
dd93cd0a | 4357 | { |
7404fe1b | 4358 | offset += view_address; |
dd93cd0a | 4359 | if (static_cast<Address>(offset_in_output_section) != invalid_address) |
7404fe1b | 4360 | offset -= offset_in_output_section; |
dd93cd0a AM |
4361 | } |
4362 | ||
cf43a2fe | 4363 | // Handle the reloc addend based on the strategy. |
cf43a2fe AM |
4364 | if (strategy == Relocatable_relocs::RELOC_COPY) |
4365 | ; | |
4366 | else if (strategy == Relocatable_relocs::RELOC_ADJUST_FOR_SECTION_RELA) | |
4367 | { | |
7404fe1b | 4368 | const Symbol_value<size>* psymval = object->local_symbol(orig_r_sym); |
cf43a2fe AM |
4369 | addend = psymval->value(object, addend); |
4370 | } | |
4371 | else if (strategy == Relocatable_relocs::RELOC_SPECIAL) | |
4372 | { | |
4373 | if (addend >= 32768) | |
4374 | addend += got2_addend; | |
4375 | } | |
4376 | else | |
4377 | gold_unreachable(); | |
4378 | ||
7404fe1b AM |
4379 | if (!parameters->options().relocatable()) |
4380 | { | |
4381 | if (r_type == elfcpp::R_POWERPC_GOT_TLSGD16 | |
4382 | || r_type == elfcpp::R_POWERPC_GOT_TLSGD16_LO | |
4383 | || r_type == elfcpp::R_POWERPC_GOT_TLSGD16_HI | |
4384 | || r_type == elfcpp::R_POWERPC_GOT_TLSGD16_HA) | |
4385 | { | |
4386 | // First instruction of a global dynamic sequence, | |
4387 | // arg setup insn. | |
4388 | const bool final = gsym == NULL || gsym->final_value_is_known(); | |
4389 | switch (this->optimize_tls_gd(final)) | |
4390 | { | |
4391 | case tls::TLSOPT_TO_IE: | |
4392 | r_type += (elfcpp::R_POWERPC_GOT_TPREL16 | |
4393 | - elfcpp::R_POWERPC_GOT_TLSGD16); | |
4394 | break; | |
4395 | case tls::TLSOPT_TO_LE: | |
4396 | if (r_type == elfcpp::R_POWERPC_GOT_TLSGD16 | |
4397 | || r_type == elfcpp::R_POWERPC_GOT_TLSGD16_LO) | |
4398 | r_type = elfcpp::R_POWERPC_TPREL16_HA; | |
4399 | else | |
4400 | { | |
4401 | r_type = elfcpp::R_POWERPC_NONE; | |
4402 | offset -= 2 * big_endian; | |
4403 | } | |
4404 | break; | |
4405 | default: | |
4406 | break; | |
4407 | } | |
4408 | } | |
4409 | else if (r_type == elfcpp::R_POWERPC_GOT_TLSLD16 | |
4410 | || r_type == elfcpp::R_POWERPC_GOT_TLSLD16_LO | |
4411 | || r_type == elfcpp::R_POWERPC_GOT_TLSLD16_HI | |
4412 | || r_type == elfcpp::R_POWERPC_GOT_TLSLD16_HA) | |
4413 | { | |
4414 | // First instruction of a local dynamic sequence, | |
4415 | // arg setup insn. | |
4416 | if (this->optimize_tls_ld() == tls::TLSOPT_TO_LE) | |
4417 | { | |
4418 | if (r_type == elfcpp::R_POWERPC_GOT_TLSLD16 | |
4419 | || r_type == elfcpp::R_POWERPC_GOT_TLSLD16_LO) | |
4420 | { | |
4421 | r_type = elfcpp::R_POWERPC_TPREL16_HA; | |
4422 | const Output_section* os = relinfo->layout->tls_segment() | |
4423 | ->first_section(); | |
4424 | gold_assert(os != NULL); | |
4425 | gold_assert(os->needs_symtab_index()); | |
4426 | r_sym = os->symtab_index(); | |
4427 | addend = dtp_offset; | |
4428 | } | |
4429 | else | |
4430 | { | |
4431 | r_type = elfcpp::R_POWERPC_NONE; | |
4432 | offset -= 2 * big_endian; | |
4433 | } | |
4434 | } | |
4435 | } | |
4436 | else if (r_type == elfcpp::R_POWERPC_GOT_TPREL16 | |
4437 | || r_type == elfcpp::R_POWERPC_GOT_TPREL16_LO | |
4438 | || r_type == elfcpp::R_POWERPC_GOT_TPREL16_HI | |
4439 | || r_type == elfcpp::R_POWERPC_GOT_TPREL16_HA) | |
4440 | { | |
4441 | // First instruction of initial exec sequence. | |
4442 | const bool final = gsym == NULL || gsym->final_value_is_known(); | |
4443 | if (this->optimize_tls_ie(final) == tls::TLSOPT_TO_LE) | |
4444 | { | |
4445 | if (r_type == elfcpp::R_POWERPC_GOT_TPREL16 | |
4446 | || r_type == elfcpp::R_POWERPC_GOT_TPREL16_LO) | |
4447 | r_type = elfcpp::R_POWERPC_TPREL16_HA; | |
4448 | else | |
4449 | { | |
4450 | r_type = elfcpp::R_POWERPC_NONE; | |
4451 | offset -= 2 * big_endian; | |
4452 | } | |
4453 | } | |
4454 | } | |
4455 | else if ((size == 64 && r_type == elfcpp::R_PPC64_TLSGD) | |
4456 | || (size == 32 && r_type == elfcpp::R_PPC_TLSGD)) | |
4457 | { | |
4458 | // Second instruction of a global dynamic sequence, | |
4459 | // the __tls_get_addr call | |
4460 | const bool final = gsym == NULL || gsym->final_value_is_known(); | |
4461 | switch (this->optimize_tls_gd(final)) | |
4462 | { | |
4463 | case tls::TLSOPT_TO_IE: | |
4464 | r_type = elfcpp::R_POWERPC_NONE; | |
4465 | zap_next = true; | |
4466 | break; | |
4467 | case tls::TLSOPT_TO_LE: | |
4468 | r_type = elfcpp::R_POWERPC_TPREL16_LO; | |
4469 | offset += 2 * big_endian; | |
4470 | zap_next = true; | |
4471 | break; | |
4472 | default: | |
4473 | break; | |
4474 | } | |
4475 | } | |
4476 | else if ((size == 64 && r_type == elfcpp::R_PPC64_TLSLD) | |
4477 | || (size == 32 && r_type == elfcpp::R_PPC_TLSLD)) | |
4478 | { | |
4479 | // Second instruction of a local dynamic sequence, | |
4480 | // the __tls_get_addr call | |
4481 | if (this->optimize_tls_ld() == tls::TLSOPT_TO_LE) | |
4482 | { | |
4483 | const Output_section* os = relinfo->layout->tls_segment() | |
4484 | ->first_section(); | |
4485 | gold_assert(os != NULL); | |
4486 | gold_assert(os->needs_symtab_index()); | |
4487 | r_sym = os->symtab_index(); | |
4488 | addend = dtp_offset; | |
4489 | r_type = elfcpp::R_POWERPC_TPREL16_LO; | |
4490 | offset += 2 * big_endian; | |
4491 | zap_next = true; | |
4492 | } | |
4493 | } | |
4494 | else if (r_type == elfcpp::R_POWERPC_TLS) | |
4495 | { | |
4496 | // Second instruction of an initial exec sequence | |
4497 | const bool final = gsym == NULL || gsym->final_value_is_known(); | |
4498 | if (this->optimize_tls_ie(final) == tls::TLSOPT_TO_LE) | |
4499 | { | |
4500 | r_type = elfcpp::R_POWERPC_TPREL16_LO; | |
4501 | offset += 2 * big_endian; | |
4502 | } | |
4503 | } | |
4504 | } | |
4505 | ||
4506 | reloc_write.put_r_offset(offset); | |
4507 | reloc_write.put_r_info(elfcpp::elf_r_info<size>(r_sym, r_type)); | |
4508 | reloc_write.put_r_addend(addend); | |
cf43a2fe AM |
4509 | |
4510 | pwrite += reloc_size; | |
4511 | } | |
4512 | ||
4513 | gold_assert(static_cast<section_size_type>(pwrite - reloc_view) | |
4514 | == reloc_view_size); | |
42cacb20 DE |
4515 | } |
4516 | ||
4517 | // Return the value to use for a dynamic which requires special | |
4518 | // treatment. This is how we support equality comparisons of function | |
4519 | // pointers across shared library boundaries, as described in the | |
4520 | // processor specific ABI supplement. | |
4521 | ||
4522 | template<int size, bool big_endian> | |
4523 | uint64_t | |
4524 | Target_powerpc<size, big_endian>::do_dynsym_value(const Symbol* gsym) const | |
4525 | { | |
cf43a2fe AM |
4526 | if (size == 32) |
4527 | { | |
4528 | gold_assert(gsym->is_from_dynobj() && gsym->has_plt_offset()); | |
4529 | return this->plt_section()->address() + gsym->plt_offset(); | |
4530 | } | |
4531 | else | |
4532 | gold_unreachable(); | |
42cacb20 DE |
4533 | } |
4534 | ||
bd73a62d AM |
4535 | // Return the offset to use for the GOT_INDX'th got entry which is |
4536 | // for a local tls symbol specified by OBJECT, SYMNDX. | |
4537 | template<int size, bool big_endian> | |
4538 | int64_t | |
4539 | Target_powerpc<size, big_endian>::do_tls_offset_for_local( | |
4540 | const Relobj* object, | |
4541 | unsigned int symndx, | |
4542 | unsigned int got_indx) const | |
4543 | { | |
4544 | const Powerpc_relobj<size, big_endian>* ppc_object | |
4545 | = static_cast<const Powerpc_relobj<size, big_endian>*>(object); | |
4546 | if (ppc_object->local_symbol(symndx)->is_tls_symbol()) | |
4547 | { | |
4548 | for (Got_type got_type = GOT_TYPE_TLSGD; | |
4549 | got_type <= GOT_TYPE_TPREL; | |
4550 | got_type = Got_type(got_type + 1)) | |
4551 | if (ppc_object->local_has_got_offset(symndx, got_type)) | |
4552 | { | |
4553 | unsigned int off = ppc_object->local_got_offset(symndx, got_type); | |
4554 | if (got_type == GOT_TYPE_TLSGD) | |
4555 | off += size / 8; | |
4556 | if (off == got_indx * (size / 8)) | |
4557 | { | |
4558 | if (got_type == GOT_TYPE_TPREL) | |
4559 | return -tp_offset; | |
4560 | else | |
4561 | return -dtp_offset; | |
4562 | } | |
4563 | } | |
4564 | } | |
4565 | gold_unreachable(); | |
4566 | } | |
4567 | ||
4568 | // Return the offset to use for the GOT_INDX'th got entry which is | |
4569 | // for global tls symbol GSYM. | |
4570 | template<int size, bool big_endian> | |
4571 | int64_t | |
4572 | Target_powerpc<size, big_endian>::do_tls_offset_for_global( | |
4573 | Symbol* gsym, | |
4574 | unsigned int got_indx) const | |
4575 | { | |
4576 | if (gsym->type() == elfcpp::STT_TLS) | |
4577 | { | |
4578 | for (Got_type got_type = GOT_TYPE_TLSGD; | |
4579 | got_type <= GOT_TYPE_TPREL; | |
4580 | got_type = Got_type(got_type + 1)) | |
4581 | if (gsym->has_got_offset(got_type)) | |
4582 | { | |
4583 | unsigned int off = gsym->got_offset(got_type); | |
4584 | if (got_type == GOT_TYPE_TLSGD) | |
4585 | off += size / 8; | |
4586 | if (off == got_indx * (size / 8)) | |
4587 | { | |
4588 | if (got_type == GOT_TYPE_TPREL) | |
4589 | return -tp_offset; | |
4590 | else | |
4591 | return -dtp_offset; | |
4592 | } | |
4593 | } | |
4594 | } | |
4595 | gold_unreachable(); | |
4596 | } | |
4597 | ||
42cacb20 DE |
4598 | // The selector for powerpc object files. |
4599 | ||
4600 | template<int size, bool big_endian> | |
4601 | class Target_selector_powerpc : public Target_selector | |
4602 | { | |
4603 | public: | |
4604 | Target_selector_powerpc() | |
4605 | : Target_selector(elfcpp::EM_NONE, size, big_endian, | |
03ef7571 ILT |
4606 | (size == 64 |
4607 | ? (big_endian ? "elf64-powerpc" : "elf64-powerpcle") | |
4608 | : (big_endian ? "elf32-powerpc" : "elf32-powerpcle")), | |
4609 | (size == 64 | |
4610 | ? (big_endian ? "elf64ppc" : "elf64lppc") | |
4611 | : (big_endian ? "elf32ppc" : "elf32lppc"))) | |
42cacb20 DE |
4612 | { } |
4613 | ||
2e702c99 RM |
4614 | virtual Target* |
4615 | do_recognize(Input_file*, off_t, int machine, int, int) | |
42cacb20 DE |
4616 | { |
4617 | switch (size) | |
4618 | { | |
4619 | case 64: | |
2ea97941 | 4620 | if (machine != elfcpp::EM_PPC64) |
42cacb20 DE |
4621 | return NULL; |
4622 | break; | |
4623 | ||
4624 | case 32: | |
2ea97941 | 4625 | if (machine != elfcpp::EM_PPC) |
42cacb20 DE |
4626 | return NULL; |
4627 | break; | |
4628 | ||
4629 | default: | |
4630 | return NULL; | |
4631 | } | |
4632 | ||
7f055c20 | 4633 | return this->instantiate_target(); |
42cacb20 DE |
4634 | } |
4635 | ||
2e702c99 RM |
4636 | virtual Target* |
4637 | do_instantiate_target() | |
7f055c20 | 4638 | { return new Target_powerpc<size, big_endian>(); } |
42cacb20 DE |
4639 | }; |
4640 | ||
4641 | Target_selector_powerpc<32, true> target_selector_ppc32; | |
4642 | Target_selector_powerpc<32, false> target_selector_ppc32le; | |
4643 | Target_selector_powerpc<64, true> target_selector_ppc64; | |
4644 | Target_selector_powerpc<64, false> target_selector_ppc64le; | |
4645 | ||
4646 | } // End anonymous namespace. |