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