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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: | |
60 | Powerpc_relobj(const std::string& name, Input_file* input_file, off_t offset, | |
61 | const typename elfcpp::Ehdr<size, big_endian>& ehdr) | |
62 | : Sized_relobj_file<size, big_endian>(name, input_file, offset, ehdr), | |
63 | got2_section_(0) | |
64 | { } | |
65 | ||
66 | ~Powerpc_relobj() | |
67 | { } | |
68 | ||
69 | unsigned int | |
70 | got2_shndx() const | |
71 | { | |
72 | if (size == 32) | |
73 | return this->got2_section_; | |
74 | else | |
75 | return 0; | |
76 | } | |
77 | ||
cf43a2fe AM |
78 | bool |
79 | do_find_special_sections(Read_symbols_data* sd); | |
80 | ||
81 | private: | |
82 | unsigned int got2_section_; | |
83 | }; | |
84 | ||
42cacb20 DE |
85 | template<int size, bool big_endian> |
86 | class Target_powerpc : public Sized_target<size, big_endian> | |
87 | { | |
88 | public: | |
d83ce4e3 AM |
89 | typedef |
90 | Output_data_reloc<elfcpp::SHT_RELA, true, size, big_endian> Reloc_section; | |
42cacb20 DE |
91 | |
92 | Target_powerpc() | |
93 | : Sized_target<size, big_endian>(&powerpc_info), | |
cf43a2fe | 94 | got_(NULL), plt_(NULL), glink_(NULL), rela_dyn_(NULL), |
42cacb20 DE |
95 | copy_relocs_(elfcpp::R_POWERPC_COPY), |
96 | dynbss_(NULL), got_mod_index_offset_(-1U) | |
97 | { | |
98 | } | |
99 | ||
2e702c99 | 100 | // Process the relocations to determine unreferenced sections for |
6d03d481 ST |
101 | // garbage collection. |
102 | void | |
ad0f2072 | 103 | gc_process_relocs(Symbol_table* symtab, |
2e702c99 RM |
104 | Layout* layout, |
105 | Sized_relobj_file<size, big_endian>* object, | |
106 | unsigned int data_shndx, | |
107 | unsigned int sh_type, | |
108 | const unsigned char* prelocs, | |
109 | size_t reloc_count, | |
110 | Output_section* output_section, | |
111 | bool needs_special_offset_handling, | |
112 | size_t local_symbol_count, | |
113 | const unsigned char* plocal_symbols); | |
6d03d481 | 114 | |
42cacb20 DE |
115 | // Scan the relocations to look for symbol adjustments. |
116 | void | |
ad0f2072 | 117 | scan_relocs(Symbol_table* symtab, |
42cacb20 | 118 | Layout* layout, |
6fa2a40b | 119 | Sized_relobj_file<size, big_endian>* object, |
42cacb20 DE |
120 | unsigned int data_shndx, |
121 | unsigned int sh_type, | |
122 | const unsigned char* prelocs, | |
123 | size_t reloc_count, | |
124 | Output_section* output_section, | |
125 | bool needs_special_offset_handling, | |
126 | size_t local_symbol_count, | |
127 | const unsigned char* plocal_symbols); | |
921b5322 AM |
128 | |
129 | // Map input .toc section to output .got section. | |
130 | const char* | |
131 | do_output_section_name(const Relobj*, const char* name, size_t* plen) const | |
132 | { | |
133 | if (size == 64 && strcmp(name, ".toc") == 0) | |
134 | { | |
135 | *plen = 4; | |
136 | return ".got"; | |
137 | } | |
138 | return NULL; | |
139 | } | |
140 | ||
42cacb20 DE |
141 | // Finalize the sections. |
142 | void | |
f59f41f3 | 143 | do_finalize_sections(Layout*, const Input_objects*, Symbol_table*); |
42cacb20 DE |
144 | |
145 | // Return the value to use for a dynamic which requires special | |
146 | // treatment. | |
147 | uint64_t | |
148 | do_dynsym_value(const Symbol*) const; | |
149 | ||
150 | // Relocate a section. | |
151 | void | |
152 | relocate_section(const Relocate_info<size, big_endian>*, | |
153 | unsigned int sh_type, | |
154 | const unsigned char* prelocs, | |
155 | size_t reloc_count, | |
156 | Output_section* output_section, | |
157 | bool needs_special_offset_handling, | |
158 | unsigned char* view, | |
159 | typename elfcpp::Elf_types<size>::Elf_Addr view_address, | |
364c7fa5 ILT |
160 | section_size_type view_size, |
161 | const Reloc_symbol_changes*); | |
42cacb20 DE |
162 | |
163 | // Scan the relocs during a relocatable link. | |
164 | void | |
ad0f2072 | 165 | scan_relocatable_relocs(Symbol_table* symtab, |
42cacb20 | 166 | Layout* layout, |
6fa2a40b | 167 | Sized_relobj_file<size, big_endian>* object, |
42cacb20 DE |
168 | unsigned int data_shndx, |
169 | unsigned int sh_type, | |
170 | const unsigned char* prelocs, | |
171 | size_t reloc_count, | |
172 | Output_section* output_section, | |
173 | bool needs_special_offset_handling, | |
174 | size_t local_symbol_count, | |
175 | const unsigned char* plocal_symbols, | |
176 | Relocatable_relocs*); | |
177 | ||
178 | // Relocate a section during a relocatable link. | |
179 | void | |
180 | relocate_for_relocatable(const Relocate_info<size, big_endian>*, | |
181 | unsigned int sh_type, | |
182 | const unsigned char* prelocs, | |
183 | size_t reloc_count, | |
184 | Output_section* output_section, | |
185 | off_t offset_in_output_section, | |
186 | const Relocatable_relocs*, | |
cf43a2fe AM |
187 | unsigned char*, |
188 | typename elfcpp::Elf_types<size>::Elf_Addr, | |
189 | section_size_type, | |
42cacb20 DE |
190 | unsigned char* reloc_view, |
191 | section_size_type reloc_view_size); | |
192 | ||
193 | // Return whether SYM is defined by the ABI. | |
194 | bool | |
9c2d0ef9 | 195 | do_is_defined_by_abi(const Symbol* sym) const |
42cacb20 | 196 | { |
cf43a2fe | 197 | return strcmp(sym->name(), "__tls_get_addr") == 0; |
42cacb20 DE |
198 | } |
199 | ||
200 | // Return the size of the GOT section. | |
201 | section_size_type | |
0e70b911 | 202 | got_size() const |
42cacb20 DE |
203 | { |
204 | gold_assert(this->got_ != NULL); | |
205 | return this->got_->data_size(); | |
206 | } | |
207 | ||
cf43a2fe AM |
208 | // Get the PLT section. |
209 | const Output_data_plt_powerpc<size, big_endian>* | |
210 | plt_section() const | |
211 | { | |
212 | gold_assert(this->plt_ != NULL); | |
213 | return this->plt_; | |
214 | } | |
215 | ||
216 | // Get the .glink section. | |
217 | const Output_data_glink<size, big_endian>* | |
218 | glink_section() const | |
219 | { | |
220 | gold_assert(this->glink_ != NULL); | |
221 | return this->glink_; | |
222 | } | |
223 | ||
224 | // Get the GOT section. | |
225 | const Output_data_got_powerpc<size, big_endian>* | |
226 | got_section() const | |
227 | { | |
228 | gold_assert(this->got_ != NULL); | |
229 | return this->got_; | |
230 | } | |
231 | ||
232 | protected: | |
233 | Object* | |
234 | do_make_elf_object(const std::string&, Input_file*, off_t, | |
235 | const elfcpp::Ehdr<size, big_endian>&); | |
236 | ||
0e70b911 CC |
237 | // Return the number of entries in the GOT. |
238 | unsigned int | |
239 | got_entry_count() const | |
240 | { | |
241 | if (this->got_ == NULL) | |
242 | return 0; | |
243 | return this->got_size() / (size / 8); | |
244 | } | |
245 | ||
246 | // Return the number of entries in the PLT. | |
247 | unsigned int | |
248 | plt_entry_count() const; | |
249 | ||
250 | // Return the offset of the first non-reserved PLT entry. | |
251 | unsigned int | |
252 | first_plt_entry_offset() const; | |
253 | ||
254 | // Return the size of each PLT entry. | |
255 | unsigned int | |
256 | plt_entry_size() const; | |
257 | ||
42cacb20 DE |
258 | private: |
259 | ||
260 | // The class which scans relocations. | |
261 | class Scan | |
262 | { | |
263 | public: | |
264 | Scan() | |
265 | : issued_non_pic_error_(false) | |
266 | { } | |
267 | ||
95a2c8d6 RS |
268 | static inline int |
269 | get_reference_flags(unsigned int r_type); | |
270 | ||
42cacb20 | 271 | inline void |
ad0f2072 | 272 | local(Symbol_table* symtab, Layout* layout, Target_powerpc* target, |
6fa2a40b | 273 | Sized_relobj_file<size, big_endian>* object, |
42cacb20 DE |
274 | unsigned int data_shndx, |
275 | Output_section* output_section, | |
276 | const elfcpp::Rela<size, big_endian>& reloc, unsigned int r_type, | |
277 | const elfcpp::Sym<size, big_endian>& lsym); | |
278 | ||
279 | inline void | |
ad0f2072 | 280 | global(Symbol_table* symtab, Layout* layout, Target_powerpc* target, |
6fa2a40b | 281 | Sized_relobj_file<size, big_endian>* object, |
42cacb20 DE |
282 | unsigned int data_shndx, |
283 | Output_section* output_section, | |
284 | const elfcpp::Rela<size, big_endian>& reloc, unsigned int r_type, | |
285 | Symbol* gsym); | |
286 | ||
21bb3914 ST |
287 | inline bool |
288 | local_reloc_may_be_function_pointer(Symbol_table* , Layout* , | |
289 | Target_powerpc* , | |
2e702c99 | 290 | Sized_relobj_file<size, big_endian>* , |
21bb3914 | 291 | unsigned int , |
2e702c99 RM |
292 | Output_section* , |
293 | const elfcpp::Rela<size, big_endian>& , | |
294 | unsigned int , | |
295 | const elfcpp::Sym<size, big_endian>&) | |
21bb3914 ST |
296 | { return false; } |
297 | ||
298 | inline bool | |
299 | global_reloc_may_be_function_pointer(Symbol_table* , Layout* , | |
300 | Target_powerpc* , | |
2e702c99 RM |
301 | Sized_relobj_file<size, big_endian>* , |
302 | unsigned int , | |
303 | Output_section* , | |
304 | const elfcpp::Rela<size, | |
21bb3914 ST |
305 | big_endian>& , |
306 | unsigned int , Symbol*) | |
307 | { return false; } | |
308 | ||
42cacb20 DE |
309 | private: |
310 | static void | |
6fa2a40b | 311 | unsupported_reloc_local(Sized_relobj_file<size, big_endian>*, |
42cacb20 DE |
312 | unsigned int r_type); |
313 | ||
314 | static void | |
6fa2a40b | 315 | unsupported_reloc_global(Sized_relobj_file<size, big_endian>*, |
42cacb20 DE |
316 | unsigned int r_type, Symbol*); |
317 | ||
318 | static void | |
319 | generate_tls_call(Symbol_table* symtab, Layout* layout, | |
320 | Target_powerpc* target); | |
321 | ||
322 | void | |
323 | check_non_pic(Relobj*, unsigned int r_type); | |
324 | ||
325 | // Whether we have issued an error about a non-PIC compilation. | |
326 | bool issued_non_pic_error_; | |
327 | }; | |
328 | ||
329 | // The class which implements relocation. | |
330 | class Relocate | |
331 | { | |
332 | public: | |
333 | // Do a relocation. Return false if the caller should not issue | |
334 | // any warnings about this relocation. | |
335 | inline bool | |
336 | relocate(const Relocate_info<size, big_endian>*, Target_powerpc*, | |
031cdbed ILT |
337 | Output_section*, size_t relnum, |
338 | const elfcpp::Rela<size, big_endian>&, | |
42cacb20 DE |
339 | unsigned int r_type, const Sized_symbol<size>*, |
340 | const Symbol_value<size>*, | |
341 | unsigned char*, | |
342 | typename elfcpp::Elf_types<size>::Elf_Addr, | |
343 | section_size_type); | |
344 | ||
345 | private: | |
346 | // Do a TLS relocation. | |
347 | inline void | |
348 | relocate_tls(const Relocate_info<size, big_endian>*, | |
349 | Target_powerpc* target, | |
2e702c99 | 350 | size_t relnum, const elfcpp::Rela<size, big_endian>&, |
42cacb20 DE |
351 | unsigned int r_type, const Sized_symbol<size>*, |
352 | const Symbol_value<size>*, | |
353 | unsigned char*, | |
354 | typename elfcpp::Elf_types<size>::Elf_Addr, | |
355 | section_size_type); | |
356 | }; | |
357 | ||
358 | // A class which returns the size required for a relocation type, | |
359 | // used while scanning relocs during a relocatable link. | |
360 | class Relocatable_size_for_reloc | |
361 | { | |
362 | public: | |
363 | unsigned int | |
cf43a2fe AM |
364 | get_size_for_reloc(unsigned int, Relobj*) |
365 | { | |
366 | gold_unreachable(); | |
367 | return 0; | |
368 | } | |
42cacb20 DE |
369 | }; |
370 | ||
cf43a2fe AM |
371 | // Adjust TLS relocation type based on the options and whether this |
372 | // is a local symbol. | |
373 | static tls::Tls_optimization | |
374 | optimize_tls_reloc(bool is_final, int r_type); | |
375 | ||
42cacb20 | 376 | // Get the GOT section, creating it if necessary. |
cf43a2fe | 377 | Output_data_got_powerpc<size, big_endian>* |
42cacb20 DE |
378 | got_section(Symbol_table*, Layout*); |
379 | ||
cf43a2fe AM |
380 | // Create glink. |
381 | void | |
382 | make_glink_section(Layout*); | |
42cacb20 | 383 | |
cf43a2fe AM |
384 | // Create the PLT section. |
385 | void | |
386 | make_plt_section(Layout*); | |
42cacb20 DE |
387 | |
388 | // Create a PLT entry for a global symbol. | |
389 | void | |
cf43a2fe AM |
390 | make_plt_entry(Layout*, Symbol*, |
391 | const elfcpp::Rela<size, big_endian>&, | |
392 | const Sized_relobj<size, big_endian>* object); | |
42cacb20 DE |
393 | |
394 | // Create a GOT entry for the TLS module index. | |
395 | unsigned int | |
396 | got_mod_index_entry(Symbol_table* symtab, Layout* layout, | |
6fa2a40b | 397 | Sized_relobj_file<size, big_endian>* object); |
42cacb20 | 398 | |
42cacb20 DE |
399 | // Get the dynamic reloc section, creating it if necessary. |
400 | Reloc_section* | |
401 | rela_dyn_section(Layout*); | |
402 | ||
42cacb20 DE |
403 | // Copy a relocation against a global symbol. |
404 | void | |
ef9beddf | 405 | copy_reloc(Symbol_table* symtab, Layout* layout, |
2e702c99 | 406 | Sized_relobj_file<size, big_endian>* object, |
42cacb20 DE |
407 | unsigned int shndx, Output_section* output_section, |
408 | Symbol* sym, const elfcpp::Rela<size, big_endian>& reloc) | |
409 | { | |
410 | this->copy_relocs_.copy_reloc(symtab, layout, | |
411 | symtab->get_sized_symbol<size>(sym), | |
412 | object, shndx, output_section, | |
413 | reloc, this->rela_dyn_section(layout)); | |
414 | } | |
415 | ||
416 | // Information about this specific target which we pass to the | |
417 | // general Target structure. | |
418 | static Target::Target_info powerpc_info; | |
419 | ||
420 | // The types of GOT entries needed for this platform. | |
0e70b911 CC |
421 | // These values are exposed to the ABI in an incremental link. |
422 | // Do not renumber existing values without changing the version | |
423 | // number of the .gnu_incremental_inputs section. | |
42cacb20 DE |
424 | enum Got_type |
425 | { | |
426 | GOT_TYPE_STANDARD = 0, // GOT entry for a regular symbol | |
427 | GOT_TYPE_TLS_OFFSET = 1, // GOT entry for TLS offset | |
428 | GOT_TYPE_TLS_PAIR = 2, // GOT entry for TLS module/offset pair | |
429 | }; | |
430 | ||
cf43a2fe AM |
431 | // The GOT output section. |
432 | Output_data_got_powerpc<size, big_endian>* got_; | |
433 | // The PLT output section. | |
42cacb20 | 434 | Output_data_plt_powerpc<size, big_endian>* plt_; |
cf43a2fe AM |
435 | // The .glink output section. |
436 | Output_data_glink<size, big_endian>* glink_; | |
437 | // The dynamic reloc output section. | |
42cacb20 DE |
438 | Reloc_section* rela_dyn_; |
439 | // Relocs saved to avoid a COPY reloc. | |
440 | Copy_relocs<elfcpp::SHT_RELA, size, big_endian> copy_relocs_; | |
441 | // Space for variables copied with a COPY reloc. | |
442 | Output_data_space* dynbss_; | |
443 | // Offset of the GOT entry for the TLS module index; | |
444 | unsigned int got_mod_index_offset_; | |
445 | }; | |
446 | ||
447 | template<> | |
448 | Target::Target_info Target_powerpc<32, true>::powerpc_info = | |
449 | { | |
450 | 32, // size | |
451 | true, // is_big_endian | |
452 | elfcpp::EM_PPC, // machine_code | |
453 | false, // has_make_symbol | |
454 | false, // has_resolve | |
455 | false, // has_code_fill | |
456 | true, // is_default_stack_executable | |
b3ce541e | 457 | false, // can_icf_inline_merge_sections |
42cacb20 DE |
458 | '\0', // wrap_char |
459 | "/usr/lib/ld.so.1", // dynamic_linker | |
460 | 0x10000000, // default_text_segment_address | |
461 | 64 * 1024, // abi_pagesize (overridable by -z max-page-size) | |
8a5e3e08 | 462 | 4 * 1024, // common_pagesize (overridable by -z common-page-size) |
2e702c99 RM |
463 | false, // isolate_execinstr |
464 | 0, // rosegment_gap | |
8a5e3e08 ILT |
465 | elfcpp::SHN_UNDEF, // small_common_shndx |
466 | elfcpp::SHN_UNDEF, // large_common_shndx | |
467 | 0, // small_common_section_flags | |
05a352e6 DK |
468 | 0, // large_common_section_flags |
469 | NULL, // attributes_section | |
470 | NULL // attributes_vendor | |
42cacb20 DE |
471 | }; |
472 | ||
473 | template<> | |
474 | Target::Target_info Target_powerpc<32, false>::powerpc_info = | |
475 | { | |
476 | 32, // size | |
477 | false, // is_big_endian | |
478 | elfcpp::EM_PPC, // machine_code | |
479 | false, // has_make_symbol | |
480 | false, // has_resolve | |
481 | false, // has_code_fill | |
482 | true, // is_default_stack_executable | |
b3ce541e | 483 | false, // can_icf_inline_merge_sections |
42cacb20 DE |
484 | '\0', // wrap_char |
485 | "/usr/lib/ld.so.1", // dynamic_linker | |
486 | 0x10000000, // default_text_segment_address | |
487 | 64 * 1024, // abi_pagesize (overridable by -z max-page-size) | |
8a5e3e08 | 488 | 4 * 1024, // common_pagesize (overridable by -z common-page-size) |
2e702c99 RM |
489 | false, // isolate_execinstr |
490 | 0, // rosegment_gap | |
8a5e3e08 ILT |
491 | elfcpp::SHN_UNDEF, // small_common_shndx |
492 | elfcpp::SHN_UNDEF, // large_common_shndx | |
493 | 0, // small_common_section_flags | |
05a352e6 DK |
494 | 0, // large_common_section_flags |
495 | NULL, // attributes_section | |
496 | NULL // attributes_vendor | |
42cacb20 DE |
497 | }; |
498 | ||
499 | template<> | |
500 | Target::Target_info Target_powerpc<64, true>::powerpc_info = | |
501 | { | |
502 | 64, // size | |
503 | true, // is_big_endian | |
504 | elfcpp::EM_PPC64, // machine_code | |
505 | false, // has_make_symbol | |
506 | false, // has_resolve | |
507 | false, // has_code_fill | |
508 | true, // is_default_stack_executable | |
b3ce541e | 509 | false, // can_icf_inline_merge_sections |
42cacb20 DE |
510 | '\0', // wrap_char |
511 | "/usr/lib/ld.so.1", // dynamic_linker | |
512 | 0x10000000, // default_text_segment_address | |
513 | 64 * 1024, // abi_pagesize (overridable by -z max-page-size) | |
8a5e3e08 | 514 | 8 * 1024, // common_pagesize (overridable by -z common-page-size) |
2e702c99 RM |
515 | false, // isolate_execinstr |
516 | 0, // rosegment_gap | |
8a5e3e08 ILT |
517 | elfcpp::SHN_UNDEF, // small_common_shndx |
518 | elfcpp::SHN_UNDEF, // large_common_shndx | |
519 | 0, // small_common_section_flags | |
05a352e6 DK |
520 | 0, // large_common_section_flags |
521 | NULL, // attributes_section | |
522 | NULL // attributes_vendor | |
42cacb20 DE |
523 | }; |
524 | ||
525 | template<> | |
526 | Target::Target_info Target_powerpc<64, false>::powerpc_info = | |
527 | { | |
528 | 64, // size | |
529 | false, // is_big_endian | |
530 | elfcpp::EM_PPC64, // machine_code | |
531 | false, // has_make_symbol | |
532 | false, // has_resolve | |
533 | false, // has_code_fill | |
534 | true, // is_default_stack_executable | |
b3ce541e | 535 | false, // can_icf_inline_merge_sections |
42cacb20 DE |
536 | '\0', // wrap_char |
537 | "/usr/lib/ld.so.1", // dynamic_linker | |
538 | 0x10000000, // default_text_segment_address | |
539 | 64 * 1024, // abi_pagesize (overridable by -z max-page-size) | |
8a5e3e08 | 540 | 8 * 1024, // common_pagesize (overridable by -z common-page-size) |
2e702c99 RM |
541 | false, // isolate_execinstr |
542 | 0, // rosegment_gap | |
8a5e3e08 ILT |
543 | elfcpp::SHN_UNDEF, // small_common_shndx |
544 | elfcpp::SHN_UNDEF, // large_common_shndx | |
545 | 0, // small_common_section_flags | |
05a352e6 DK |
546 | 0, // large_common_section_flags |
547 | NULL, // attributes_section | |
548 | NULL // attributes_vendor | |
42cacb20 DE |
549 | }; |
550 | ||
551 | template<int size, bool big_endian> | |
552 | class Powerpc_relocate_functions | |
553 | { | |
554 | private: | |
cf43a2fe | 555 | // Do a simple RELA relocation |
42cacb20 DE |
556 | template<int valsize> |
557 | static inline void | |
558 | rela(unsigned char* view, | |
559 | unsigned int right_shift, | |
560 | elfcpp::Elf_Xword dst_mask, | |
561 | typename elfcpp::Swap<size, big_endian>::Valtype value, | |
562 | typename elfcpp::Swap<size, big_endian>::Valtype addend) | |
563 | { | |
564 | typedef typename elfcpp::Swap<valsize, big_endian>::Valtype Valtype; | |
565 | Valtype* wv = reinterpret_cast<Valtype*>(view); | |
566 | Valtype val = elfcpp::Swap<valsize, big_endian>::readval(wv); | |
cf43a2fe | 567 | Valtype reloc = (value + addend) >> right_shift; |
42cacb20 DE |
568 | |
569 | val &= ~dst_mask; | |
570 | reloc &= dst_mask; | |
571 | ||
572 | elfcpp::Swap<valsize, big_endian>::writeval(wv, val | reloc); | |
573 | } | |
574 | ||
cf43a2fe | 575 | // Do a simple RELA relocation, unaligned. |
42cacb20 DE |
576 | template<int valsize> |
577 | static inline void | |
cf43a2fe AM |
578 | rela_ua(unsigned char* view, |
579 | unsigned int right_shift, | |
42cacb20 | 580 | elfcpp::Elf_Xword dst_mask, |
cf43a2fe | 581 | typename elfcpp::Swap<size, big_endian>::Valtype value, |
42cacb20 DE |
582 | typename elfcpp::Swap<size, big_endian>::Valtype addend) |
583 | { | |
584 | typedef typename elfcpp::Swap_unaligned<valsize, | |
cf43a2fe | 585 | big_endian>::Valtype Valtype; |
42cacb20 DE |
586 | Valtype* wv = reinterpret_cast<Valtype*>(view); |
587 | Valtype val = elfcpp::Swap<valsize, big_endian>::readval(wv); | |
cf43a2fe | 588 | Valtype reloc = (value + addend) >> right_shift; |
42cacb20 DE |
589 | |
590 | val &= ~dst_mask; | |
591 | reloc &= dst_mask; | |
592 | ||
cf43a2fe | 593 | elfcpp::Swap_unaligned<valsize, big_endian>::writeval(wv, val | reloc); |
42cacb20 DE |
594 | } |
595 | ||
596 | typedef Powerpc_relocate_functions<size, big_endian> This; | |
597 | typedef Relocate_functions<size, big_endian> This_reloc; | |
598 | public: | |
599 | // R_POWERPC_REL32: (Symbol + Addend - Address) | |
600 | static inline void | |
601 | rel32(unsigned char* view, | |
cf43a2fe | 602 | typename elfcpp::Elf_types<size>::Elf_Addr value, |
42cacb20 DE |
603 | typename elfcpp::Elf_types<size>::Elf_Addr addend, |
604 | typename elfcpp::Elf_types<size>::Elf_Addr address) | |
cf43a2fe | 605 | { This_reloc::pcrela32(view, value, addend, address); } |
42cacb20 DE |
606 | |
607 | // R_POWERPC_REL24: (Symbol + Addend - Address) & 0x3fffffc | |
608 | static inline void | |
609 | rel24(unsigned char* view, | |
cf43a2fe | 610 | typename elfcpp::Elf_types<size>::Elf_Addr value, |
42cacb20 DE |
611 | typename elfcpp::Elf_types<size>::Elf_Addr addend, |
612 | typename elfcpp::Elf_types<size>::Elf_Addr address) | |
613 | { | |
cf43a2fe | 614 | This::template rela<32>(view, 0, 0x03fffffc, value - address, addend); |
42cacb20 DE |
615 | } |
616 | ||
617 | // R_POWERPC_REL14: (Symbol + Addend - Address) & 0xfffc | |
618 | static inline void | |
619 | rel14(unsigned char* view, | |
cf43a2fe | 620 | typename elfcpp::Elf_types<size>::Elf_Addr value, |
42cacb20 DE |
621 | typename elfcpp::Elf_types<size>::Elf_Addr addend, |
622 | typename elfcpp::Elf_types<size>::Elf_Addr address) | |
623 | { | |
cf43a2fe | 624 | This::template rela<32>(view, 0, 0xfffc, value - address, addend); |
42cacb20 DE |
625 | } |
626 | ||
627 | // R_POWERPC_ADDR16: (Symbol + Addend) & 0xffff | |
628 | static inline void | |
629 | addr16(unsigned char* view, | |
630 | typename elfcpp::Elf_types<size>::Elf_Addr value, | |
631 | typename elfcpp::Elf_types<size>::Elf_Addr addend) | |
632 | { This_reloc::rela16(view, value, addend); } | |
633 | ||
42cacb20 DE |
634 | // R_POWERPC_ADDR16_DS: (Symbol + Addend) & 0xfffc |
635 | static inline void | |
636 | addr16_ds(unsigned char* view, | |
637 | typename elfcpp::Elf_types<size>::Elf_Addr value, | |
638 | typename elfcpp::Elf_types<size>::Elf_Addr addend) | |
639 | { | |
640 | This::template rela<16>(view, 0, 0xfffc, value, addend); | |
641 | } | |
642 | ||
643 | // R_POWERPC_ADDR16_LO: (Symbol + Addend) & 0xffff | |
644 | static inline void | |
645 | addr16_lo(unsigned char* view, | |
646 | typename elfcpp::Elf_types<size>::Elf_Addr value, | |
647 | typename elfcpp::Elf_types<size>::Elf_Addr addend) | |
648 | { This_reloc::rela16(view, value, addend); } | |
649 | ||
42cacb20 DE |
650 | // R_POWERPC_ADDR16_HI: ((Symbol + Addend) >> 16) & 0xffff |
651 | static inline void | |
652 | addr16_hi(unsigned char* view, | |
653 | typename elfcpp::Elf_types<size>::Elf_Addr value, | |
654 | typename elfcpp::Elf_types<size>::Elf_Addr addend) | |
655 | { | |
656 | This::template rela<16>(view, 16, 0xffff, value, addend); | |
657 | } | |
658 | ||
42cacb20 DE |
659 | // R_POWERPC_ADDR16_HA: Same as R_POWERPC_ADDR16_HI except that if the |
660 | // final value of the low 16 bits of the | |
661 | // relocation is negative, add one. | |
662 | static inline void | |
663 | addr16_ha(unsigned char* view, | |
664 | typename elfcpp::Elf_types<size>::Elf_Addr value, | |
665 | typename elfcpp::Elf_types<size>::Elf_Addr addend) | |
666 | { | |
cf43a2fe | 667 | This::addr16_hi(view, value + 0x8000, addend); |
42cacb20 DE |
668 | } |
669 | ||
6ce78956 | 670 | // R_POWERPC_REL16: (Symbol + Addend - Address) & 0xffff |
42cacb20 DE |
671 | static inline void |
672 | rel16(unsigned char* view, | |
cf43a2fe | 673 | typename elfcpp::Elf_types<size>::Elf_Addr value, |
42cacb20 DE |
674 | typename elfcpp::Elf_types<size>::Elf_Addr addend, |
675 | typename elfcpp::Elf_types<size>::Elf_Addr address) | |
cf43a2fe | 676 | { This_reloc::pcrela16(view, value, addend, address); } |
42cacb20 | 677 | |
6ce78956 | 678 | // R_POWERPC_REL16_LO: (Symbol + Addend - Address) & 0xffff |
42cacb20 DE |
679 | static inline void |
680 | rel16_lo(unsigned char* view, | |
cf43a2fe | 681 | typename elfcpp::Elf_types<size>::Elf_Addr value, |
42cacb20 DE |
682 | typename elfcpp::Elf_types<size>::Elf_Addr addend, |
683 | typename elfcpp::Elf_types<size>::Elf_Addr address) | |
cf43a2fe | 684 | { This_reloc::pcrela16(view, value, addend, address); } |
42cacb20 | 685 | |
6ce78956 | 686 | // R_POWERPC_REL16_HI: ((Symbol + Addend - Address) >> 16) & 0xffff |
42cacb20 DE |
687 | static inline void |
688 | rel16_hi(unsigned char* view, | |
cf43a2fe | 689 | typename elfcpp::Elf_types<size>::Elf_Addr value, |
42cacb20 DE |
690 | typename elfcpp::Elf_types<size>::Elf_Addr addend, |
691 | typename elfcpp::Elf_types<size>::Elf_Addr address) | |
d83ce4e3 | 692 | { |
cf43a2fe | 693 | This::template rela<16>(view, 16, 0xffff, value - address, addend); |
42cacb20 DE |
694 | } |
695 | ||
6ce78956 | 696 | // R_POWERPC_REL16_HA: Same as R_POWERPC_REL16_HI except that if the |
42cacb20 DE |
697 | // final value of the low 16 bits of the |
698 | // relocation is negative, add one. | |
699 | static inline void | |
700 | rel16_ha(unsigned char* view, | |
cf43a2fe | 701 | typename elfcpp::Elf_types<size>::Elf_Addr value, |
42cacb20 DE |
702 | typename elfcpp::Elf_types<size>::Elf_Addr addend, |
703 | typename elfcpp::Elf_types<size>::Elf_Addr address) | |
d83ce4e3 | 704 | { |
cf43a2fe AM |
705 | This::rel16_hi(view, value + 0x8000, addend, address); |
706 | } | |
707 | }; | |
708 | ||
709 | // Stash away the index of .got2 in a relocatable object, if such | |
710 | // a section exists. | |
711 | ||
712 | template<int size, bool big_endian> | |
713 | bool | |
714 | Powerpc_relobj<size, big_endian>::do_find_special_sections( | |
715 | Read_symbols_data* sd) | |
716 | { | |
717 | if (size == 32) | |
718 | { | |
719 | const unsigned char* const pshdrs = sd->section_headers->data(); | |
720 | const unsigned char* namesu = sd->section_names->data(); | |
721 | const char* names = reinterpret_cast<const char*>(namesu); | |
722 | section_size_type names_size = sd->section_names_size; | |
723 | const unsigned char* s; | |
724 | ||
725 | s = this->find_shdr(pshdrs, ".got2", names, names_size, NULL); | |
726 | if (s != NULL) | |
727 | { | |
728 | unsigned int ndx = (s - pshdrs) / elfcpp::Elf_sizes<size>::shdr_size; | |
d1a8cabd | 729 | this->got2_section_ = ndx; |
cf43a2fe AM |
730 | } |
731 | } | |
732 | return Sized_relobj_file<size, big_endian>::do_find_special_sections(sd); | |
733 | } | |
734 | ||
735 | // Set up PowerPC target specific relobj. | |
736 | ||
737 | template<int size, bool big_endian> | |
738 | Object* | |
739 | Target_powerpc<size, big_endian>::do_make_elf_object( | |
740 | const std::string& name, | |
741 | Input_file* input_file, | |
742 | off_t offset, const elfcpp::Ehdr<size, big_endian>& ehdr) | |
743 | { | |
744 | int et = ehdr.get_e_type(); | |
745 | if (et == elfcpp::ET_REL) | |
746 | { | |
747 | Powerpc_relobj<size, big_endian>* obj = | |
748 | new Powerpc_relobj<size, big_endian>(name, input_file, offset, ehdr); | |
749 | obj->setup(); | |
750 | return obj; | |
751 | } | |
752 | else if (et == elfcpp::ET_DYN) | |
753 | { | |
754 | Sized_dynobj<size, big_endian>* obj = | |
755 | new Sized_dynobj<size, big_endian>(name, input_file, offset, ehdr); | |
756 | obj->setup(); | |
757 | return obj; | |
758 | } | |
759 | else | |
760 | { | |
761 | gold_error(_("%s: unsupported ELF file type %d"), | |
762 | name.c_str(), et); | |
763 | return NULL; | |
764 | } | |
765 | } | |
766 | ||
767 | template<int size, bool big_endian> | |
768 | class Output_data_got_powerpc : public Output_data_got<size, big_endian> | |
769 | { | |
770 | public: | |
771 | typedef typename elfcpp::Elf_types<size>::Elf_Addr Valtype; | |
772 | typedef Output_data_reloc<elfcpp::SHT_RELA, true, size, big_endian> Rela_dyn; | |
773 | ||
774 | Output_data_got_powerpc(Symbol_table* symtab, Layout* layout) | |
775 | : Output_data_got<size, big_endian>(), | |
776 | symtab_(symtab), layout_(layout), | |
777 | header_ent_cnt_(size == 32 ? 3 : 1), | |
778 | header_index_(size == 32 ? 0x2000 : 0) | |
779 | {} | |
780 | ||
781 | class Got_entry; | |
782 | ||
783 | // Create a new GOT entry and return its offset. | |
784 | unsigned int | |
785 | add_got_entry(Got_entry got_entry) | |
42cacb20 | 786 | { |
cf43a2fe AM |
787 | this->reserve_ent(); |
788 | return Output_data_got<size, big_endian>::add_got_entry(got_entry); | |
789 | } | |
42cacb20 | 790 | |
cf43a2fe AM |
791 | // Create a pair of new GOT entries and return the offset of the first. |
792 | unsigned int | |
793 | add_got_entry_pair(Got_entry got_entry_1, Got_entry got_entry_2) | |
794 | { | |
795 | this->reserve_ent(2); | |
796 | return Output_data_got<size, big_endian>::add_got_entry_pair(got_entry_1, | |
797 | got_entry_2); | |
798 | } | |
42cacb20 | 799 | |
cf43a2fe AM |
800 | // Value of _GLOBAL_OFFSET_TABLE_ |
801 | unsigned int | |
802 | g_o_t() const | |
803 | { | |
804 | return this->got_offset(this->header_index_); | |
42cacb20 | 805 | } |
cf43a2fe AM |
806 | |
807 | // Ensure our GOT has a header. | |
808 | void | |
809 | set_final_data_size() | |
810 | { | |
811 | if (this->header_ent_cnt_ != 0) | |
812 | this->make_header(); | |
813 | Output_data_got<size, big_endian>::set_final_data_size(); | |
814 | } | |
815 | ||
816 | // First word of GOT header needs some values that are not | |
817 | // handled by Output_data_got so poke them in here. | |
818 | // For 32-bit, address of .dynamic, for 64-bit, address of TOCbase. | |
819 | void | |
820 | do_write(Output_file* of) | |
821 | { | |
6ce78956 AM |
822 | this->replace_constant(this->header_index_, |
823 | (size == 32 | |
824 | ? this->layout_->dynamic_section()->address() | |
825 | : this->address() + 0x8000)); | |
cf43a2fe AM |
826 | |
827 | Output_data_got<size, big_endian>::do_write(of); | |
828 | } | |
829 | ||
830 | private: | |
831 | void | |
832 | reserve_ent(unsigned int cnt = 1) | |
833 | { | |
834 | if (this->header_ent_cnt_ == 0) | |
835 | return; | |
836 | if (this->num_entries() + cnt > this->header_index_) | |
837 | this->make_header(); | |
838 | } | |
839 | ||
840 | void | |
841 | make_header() | |
842 | { | |
843 | this->header_ent_cnt_ = 0; | |
844 | this->header_index_ = this->num_entries(); | |
845 | if (size == 32) | |
846 | { | |
847 | Output_data_got<size, big_endian>::add_constant(0); | |
848 | Output_data_got<size, big_endian>::add_constant(0); | |
849 | Output_data_got<size, big_endian>::add_constant(0); | |
850 | ||
851 | // Define _GLOBAL_OFFSET_TABLE_ at the header | |
852 | this->symtab_->define_in_output_data("_GLOBAL_OFFSET_TABLE_", NULL, | |
853 | Symbol_table::PREDEFINED, | |
854 | this, this->g_o_t(), 0, | |
855 | elfcpp::STT_OBJECT, | |
856 | elfcpp::STB_LOCAL, | |
857 | elfcpp::STV_HIDDEN, | |
858 | 0, false, false); | |
859 | } | |
860 | else | |
861 | Output_data_got<size, big_endian>::add_constant(0); | |
862 | } | |
863 | ||
864 | // Stashed pointers. | |
865 | Symbol_table* symtab_; | |
866 | Layout* layout_; | |
867 | ||
868 | // GOT header size. | |
869 | unsigned int header_ent_cnt_; | |
870 | // GOT header index. | |
871 | unsigned int header_index_; | |
42cacb20 DE |
872 | }; |
873 | ||
874 | // Get the GOT section, creating it if necessary. | |
875 | ||
876 | template<int size, bool big_endian> | |
cf43a2fe | 877 | Output_data_got_powerpc<size, big_endian>* |
42cacb20 DE |
878 | Target_powerpc<size, big_endian>::got_section(Symbol_table* symtab, |
879 | Layout* layout) | |
880 | { | |
881 | if (this->got_ == NULL) | |
882 | { | |
883 | gold_assert(symtab != NULL && layout != NULL); | |
884 | ||
cf43a2fe AM |
885 | this->got_ |
886 | = new Output_data_got_powerpc<size, big_endian>(symtab, layout); | |
42cacb20 DE |
887 | |
888 | layout->add_output_section_data(".got", elfcpp::SHT_PROGBITS, | |
889 | elfcpp::SHF_ALLOC | elfcpp::SHF_WRITE, | |
22f0da72 | 890 | this->got_, ORDER_DATA, false); |
42cacb20 DE |
891 | } |
892 | ||
893 | return this->got_; | |
894 | } | |
895 | ||
896 | // Get the dynamic reloc section, creating it if necessary. | |
897 | ||
898 | template<int size, bool big_endian> | |
899 | typename Target_powerpc<size, big_endian>::Reloc_section* | |
900 | Target_powerpc<size, big_endian>::rela_dyn_section(Layout* layout) | |
901 | { | |
902 | if (this->rela_dyn_ == NULL) | |
903 | { | |
904 | gold_assert(layout != NULL); | |
905 | this->rela_dyn_ = new Reloc_section(parameters->options().combreloc()); | |
906 | layout->add_output_section_data(".rela.dyn", elfcpp::SHT_RELA, | |
22f0da72 ILT |
907 | elfcpp::SHF_ALLOC, this->rela_dyn_, |
908 | ORDER_DYNAMIC_RELOCS, false); | |
42cacb20 DE |
909 | } |
910 | return this->rela_dyn_; | |
911 | } | |
912 | ||
913 | // A class to handle the PLT data. | |
914 | ||
915 | template<int size, bool big_endian> | |
cf43a2fe | 916 | class Output_data_plt_powerpc : public Output_section_data_build |
42cacb20 DE |
917 | { |
918 | public: | |
919 | typedef Output_data_reloc<elfcpp::SHT_RELA, true, | |
920 | size, big_endian> Reloc_section; | |
921 | ||
cf43a2fe | 922 | Output_data_plt_powerpc(Layout*, Target_powerpc<size, big_endian>*); |
42cacb20 DE |
923 | |
924 | // Add an entry to the PLT. | |
cf43a2fe AM |
925 | void |
926 | add_entry(Symbol*); | |
42cacb20 DE |
927 | |
928 | // Return the .rela.plt section data. | |
cf43a2fe AM |
929 | const Reloc_section* |
930 | rel_plt() const | |
931 | { | |
42cacb20 DE |
932 | return this->rel_; |
933 | } | |
934 | ||
0e70b911 CC |
935 | // Return the number of PLT entries. |
936 | unsigned int | |
937 | entry_count() const | |
d83ce4e3 AM |
938 | { |
939 | return ((this->current_data_size() - initial_plt_entry_size) | |
940 | / plt_entry_size); | |
941 | } | |
0e70b911 CC |
942 | |
943 | // Return the offset of the first non-reserved PLT entry. | |
944 | static unsigned int | |
945 | first_plt_entry_offset() | |
cf43a2fe | 946 | { return initial_plt_entry_size; } |
0e70b911 CC |
947 | |
948 | // Return the size of a PLT entry. | |
949 | static unsigned int | |
950 | get_plt_entry_size() | |
cf43a2fe | 951 | { return plt_entry_size; } |
0e70b911 | 952 | |
42cacb20 | 953 | protected: |
42cacb20 | 954 | void |
cf43a2fe | 955 | do_adjust_output_section(Output_section* os) |
42cacb20 | 956 | { |
cf43a2fe | 957 | os->set_entsize(0); |
42cacb20 DE |
958 | } |
959 | ||
6ce78956 AM |
960 | // Write to a map file. |
961 | void | |
962 | do_print_to_mapfile(Mapfile* mapfile) const | |
963 | { mapfile->print_output_data(this, _("** PLT")); } | |
964 | ||
cf43a2fe AM |
965 | private: |
966 | // The size of an entry in the PLT. | |
967 | static const int plt_entry_size = size == 32 ? 4 : 24; | |
968 | // The size of the first reserved entry. | |
969 | static const int initial_plt_entry_size = size == 32 ? 0 : 24; | |
970 | ||
42cacb20 DE |
971 | // Write out the PLT data. |
972 | void | |
973 | do_write(Output_file*); | |
974 | ||
975 | // The reloc section. | |
976 | Reloc_section* rel_; | |
cf43a2fe AM |
977 | // Allows access to .glink for do_write. |
978 | Target_powerpc<size, big_endian>* targ_; | |
42cacb20 DE |
979 | }; |
980 | ||
cf43a2fe | 981 | // Create the PLT section. |
42cacb20 DE |
982 | |
983 | template<int size, bool big_endian> | |
d83ce4e3 AM |
984 | Output_data_plt_powerpc<size, big_endian>::Output_data_plt_powerpc( |
985 | Layout* layout, | |
986 | Target_powerpc<size, big_endian>* targ) | |
cf43a2fe AM |
987 | : Output_section_data_build(size == 32 ? 4 : 8), |
988 | targ_(targ) | |
42cacb20 DE |
989 | { |
990 | this->rel_ = new Reloc_section(false); | |
991 | layout->add_output_section_data(".rela.plt", elfcpp::SHT_RELA, | |
22f0da72 ILT |
992 | elfcpp::SHF_ALLOC, this->rel_, |
993 | ORDER_DYNAMIC_PLT_RELOCS, false); | |
42cacb20 DE |
994 | } |
995 | ||
42cacb20 DE |
996 | // Add an entry to the PLT. |
997 | ||
998 | template<int size, bool big_endian> | |
999 | void | |
1000 | Output_data_plt_powerpc<size, big_endian>::add_entry(Symbol* gsym) | |
1001 | { | |
cf43a2fe AM |
1002 | if (!gsym->has_plt_offset()) |
1003 | { | |
1004 | off_t off = this->current_data_size(); | |
1005 | ||
1006 | if (off == 0) | |
1007 | off += initial_plt_entry_size; | |
1008 | gsym->set_plt_offset(off); | |
1009 | gsym->set_needs_dynsym_entry(); | |
1010 | this->rel_->add_global(gsym, elfcpp::R_POWERPC_JMP_SLOT, this, off, 0); | |
1011 | off += plt_entry_size; | |
1012 | this->set_current_data_size(off); | |
1013 | } | |
42cacb20 DE |
1014 | } |
1015 | ||
d83ce4e3 AM |
1016 | static const uint32_t addis_11_11 = 0x3d6b0000; |
1017 | static const uint32_t addis_11_30 = 0x3d7e0000; | |
1018 | static const uint32_t addis_12_12 = 0x3d8c0000; | |
1019 | static const uint32_t addi_11_11 = 0x396b0000; | |
1020 | static const uint32_t add_0_11_11 = 0x7c0b5a14; | |
1021 | static const uint32_t add_11_0_11 = 0x7d605a14; | |
1022 | static const uint32_t b = 0x48000000; | |
1023 | static const uint32_t bcl_20_31 = 0x429f0005; | |
1024 | static const uint32_t bctr = 0x4e800420; | |
1025 | static const uint32_t blrl = 0x4e800021; | |
1026 | static const uint32_t lis_11 = 0x3d600000; | |
1027 | static const uint32_t lis_12 = 0x3d800000; | |
1028 | static const uint32_t lwzu_0_12 = 0x840c0000; | |
1029 | static const uint32_t lwz_0_12 = 0x800c0000; | |
1030 | static const uint32_t lwz_11_11 = 0x816b0000; | |
1031 | static const uint32_t lwz_11_30 = 0x817e0000; | |
1032 | static const uint32_t lwz_12_12 = 0x818c0000; | |
1033 | static const uint32_t mflr_0 = 0x7c0802a6; | |
1034 | static const uint32_t mflr_12 = 0x7d8802a6; | |
1035 | static const uint32_t mtctr_0 = 0x7c0903a6; | |
1036 | static const uint32_t mtctr_11 = 0x7d6903a6; | |
1037 | static const uint32_t mtlr_0 = 0x7c0803a6; | |
1038 | static const uint32_t nop = 0x60000000; | |
1039 | static const uint32_t sub_11_11_12 = 0x7d6c5850; | |
1040 | static const uint32_t addis_12_2 = 0x3d820000; | |
1041 | static const uint32_t std_2_1 = 0xf8410000; | |
1042 | static const uint32_t ld_11_12 = 0xe96c0000; | |
1043 | static const uint32_t ld_2_12 = 0xe84c0000; | |
1044 | static const uint32_t addi_12_12 = 0x398c0000; | |
1045 | static const uint32_t ld_11_2 = 0xe9620000; | |
1046 | static const uint32_t addi_2_2 = 0x38420000; | |
1047 | static const uint32_t ld_2_2 = 0xe8420000; | |
1048 | static const uint32_t mflr_11 = 0x7d6802a6; | |
1049 | static const uint32_t ld_2_11 = 0xe84b0000; | |
1050 | static const uint32_t mtlr_12 = 0x7d8803a6; | |
1051 | static const uint32_t add_12_2_11 = 0x7d825a14; | |
1052 | static const uint32_t li_0_0 = 0x38000000; | |
1053 | static const uint32_t lis_0_0 = 0x3c000000; | |
1054 | static const uint32_t ori_0_0_0 = 0x60000000; | |
42cacb20 DE |
1055 | |
1056 | // Write out the PLT. | |
1057 | ||
1058 | template<int size, bool big_endian> | |
1059 | void | |
1060 | Output_data_plt_powerpc<size, big_endian>::do_write(Output_file* of) | |
1061 | { | |
cf43a2fe AM |
1062 | if (size == 32) |
1063 | { | |
1064 | const off_t offset = this->offset(); | |
1065 | const section_size_type oview_size | |
1066 | = convert_to_section_size_type(this->data_size()); | |
1067 | unsigned char* const oview = of->get_output_view(offset, oview_size); | |
1068 | unsigned char* pov = oview; | |
1069 | unsigned char* endpov = oview + oview_size; | |
1070 | ||
1071 | // The address the .glink branch table | |
1072 | const Output_data_glink<size, big_endian>* glink | |
1073 | = this->targ_->glink_section(); | |
1074 | elfcpp::Elf_types<32>::Elf_Addr branch_tab | |
1075 | = glink->address() + glink->pltresolve(); | |
1076 | ||
1077 | while (pov < endpov) | |
1078 | { | |
1079 | elfcpp::Swap<32, big_endian>::writeval(pov, branch_tab); | |
1080 | pov += 4; | |
1081 | branch_tab += 4; | |
1082 | } | |
1083 | ||
1084 | of->write_output_view(offset, oview_size, oview); | |
1085 | } | |
1086 | } | |
1087 | ||
1088 | // Create the PLT section. | |
1089 | ||
1090 | template<int size, bool big_endian> | |
1091 | void | |
1092 | Target_powerpc<size, big_endian>::make_plt_section(Layout* layout) | |
1093 | { | |
1094 | if (this->plt_ == NULL) | |
1095 | { | |
1096 | if (this->glink_ == NULL) | |
1097 | make_glink_section(layout); | |
1098 | ||
1099 | // Ensure that .rela.dyn always appears before .rela.plt This is | |
1100 | // necessary due to how, on PowerPC and some other targets, .rela.dyn | |
1101 | // needs to include .rela.plt in it's range. | |
1102 | this->rela_dyn_section(layout); | |
1103 | ||
1104 | this->plt_ = new Output_data_plt_powerpc<size, big_endian>(layout, this); | |
1105 | layout->add_output_section_data(".plt", | |
1106 | (size == 32 | |
1107 | ? elfcpp::SHT_PROGBITS | |
1108 | : elfcpp::SHT_NOBITS), | |
1109 | elfcpp::SHF_ALLOC | elfcpp::SHF_WRITE, | |
1110 | this->plt_, | |
1111 | (size == 32 | |
1112 | ? ORDER_SMALL_DATA | |
1113 | : ORDER_SMALL_BSS), | |
1114 | false); | |
1115 | } | |
1116 | } | |
1117 | ||
1118 | // A class to handle .glink. | |
1119 | ||
1120 | template<int size, bool big_endian> | |
1121 | class Output_data_glink : public Output_section_data | |
1122 | { | |
1123 | public: | |
1124 | Output_data_glink(Target_powerpc<size, big_endian>*); | |
1125 | ||
1126 | // Add an entry | |
1127 | void | |
1128 | add_entry(const Symbol*, const elfcpp::Rela<size, big_endian>&, | |
d1a8cabd | 1129 | const Sized_relobj<size, big_endian>*); |
cf43a2fe AM |
1130 | |
1131 | unsigned int | |
1132 | find_entry(const Symbol*, const elfcpp::Rela<size, big_endian>&, | |
d1a8cabd | 1133 | const Sized_relobj<size, big_endian>*) const; |
cf43a2fe AM |
1134 | |
1135 | unsigned int | |
1136 | glink_entry_size() const | |
1137 | { | |
1138 | if (size == 32) | |
1139 | return 4 * 4; | |
1140 | else | |
1141 | // FIXME: We should be using multiple glink sections for | |
1142 | // stubs to support > 33M applications. | |
1143 | return 8 * 4; | |
1144 | } | |
1145 | ||
1146 | off_t | |
1147 | pltresolve() const | |
1148 | { | |
1149 | return this->pltresolve_; | |
1150 | } | |
1151 | ||
6ce78956 AM |
1152 | protected: |
1153 | // Write to a map file. | |
1154 | void | |
1155 | do_print_to_mapfile(Mapfile* mapfile) const | |
1156 | { mapfile->print_output_data(this, _("** glink")); } | |
1157 | ||
cf43a2fe AM |
1158 | private: |
1159 | static const int pltresolve_size = 16*4; | |
1160 | ||
1161 | void | |
1162 | set_final_data_size(); | |
1163 | ||
1164 | // Write out .glink | |
1165 | void | |
1166 | do_write(Output_file*); | |
1167 | ||
d1a8cabd | 1168 | class Glink_sym_ent |
cf43a2fe | 1169 | { |
d1a8cabd AM |
1170 | public: |
1171 | Glink_sym_ent(const Symbol* sym, | |
cf43a2fe | 1172 | const elfcpp::Rela<size, big_endian>& reloc, |
d1a8cabd AM |
1173 | const Sized_relobj<size, big_endian>* object) |
1174 | : sym_(sym), object_(0), addend_(0) | |
cf43a2fe AM |
1175 | { |
1176 | if (size != 32) | |
1177 | this->addend_ = reloc.get_r_addend(); | |
d1a8cabd AM |
1178 | else if (parameters->options().output_is_position_independent() |
1179 | && (elfcpp::elf_r_type<size>(reloc.get_r_info()) | |
1180 | == elfcpp::R_PPC_PLTREL24)) | |
cf43a2fe | 1181 | { |
d1a8cabd | 1182 | this->addend_ = reloc.get_r_addend(); |
cf43a2fe | 1183 | if (this->addend_ != 0) |
d1a8cabd | 1184 | this->object_ = object; |
cf43a2fe AM |
1185 | } |
1186 | } | |
1187 | ||
d1a8cabd | 1188 | const Symbol* sym_; |
cf43a2fe | 1189 | const Sized_relobj<size, big_endian>* object_; |
cf43a2fe AM |
1190 | unsigned int addend_; |
1191 | ||
1192 | bool operator==(const Glink_sym_ent& that) const | |
1193 | { | |
1194 | return (this->sym_ == that.sym_ | |
1195 | && this->object_ == that.object_ | |
d1a8cabd | 1196 | && this->addend_ == that.addend_); |
cf43a2fe AM |
1197 | } |
1198 | }; | |
1199 | ||
d1a8cabd | 1200 | class Glink_sym_ent_hash |
cf43a2fe | 1201 | { |
d1a8cabd | 1202 | public: |
cf43a2fe AM |
1203 | size_t operator()(const Glink_sym_ent& ent) const |
1204 | { | |
1205 | return (reinterpret_cast<uintptr_t>(ent.sym_) | |
1206 | ^ reinterpret_cast<uintptr_t>(ent.object_) | |
cf43a2fe AM |
1207 | ^ ent.addend_); |
1208 | } | |
1209 | }; | |
1210 | ||
d1a8cabd | 1211 | // Map sym/object/addend to index. |
cf43a2fe AM |
1212 | typedef Unordered_map<Glink_sym_ent, unsigned int, |
1213 | Glink_sym_ent_hash> Glink_entries; | |
1214 | Glink_entries glink_entries_; | |
1215 | ||
1216 | // Offset of pltresolve stub (actually, branch table for 32-bit) | |
1217 | off_t pltresolve_; | |
1218 | ||
1219 | // Allows access to .got and .plt for do_write. | |
1220 | Target_powerpc<size, big_endian>* targ_; | |
1221 | }; | |
1222 | ||
1223 | // Create the glink section. | |
1224 | ||
1225 | template<int size, bool big_endian> | |
d83ce4e3 AM |
1226 | Output_data_glink<size, big_endian>::Output_data_glink( |
1227 | Target_powerpc<size, big_endian>* targ) | |
cf43a2fe AM |
1228 | : Output_section_data(16), |
1229 | pltresolve_(0), targ_(targ) | |
1230 | { | |
1231 | } | |
1232 | ||
1233 | // Add an entry to glink, if we do not already have one for this | |
d1a8cabd | 1234 | // sym/object/addend combo. |
cf43a2fe AM |
1235 | |
1236 | template<int size, bool big_endian> | |
1237 | void | |
d83ce4e3 AM |
1238 | Output_data_glink<size, big_endian>::add_entry( |
1239 | const Symbol* gsym, | |
1240 | const elfcpp::Rela<size, big_endian>& reloc, | |
d1a8cabd | 1241 | const Sized_relobj<size, big_endian>* object) |
cf43a2fe | 1242 | { |
d1a8cabd | 1243 | Glink_sym_ent ent(gsym, reloc, object); |
cf43a2fe | 1244 | unsigned int indx = this->glink_entries_.size(); |
d83ce4e3 | 1245 | this->glink_entries_.insert(std::make_pair(ent, indx)); |
cf43a2fe AM |
1246 | } |
1247 | ||
1248 | template<int size, bool big_endian> | |
1249 | unsigned int | |
d83ce4e3 AM |
1250 | Output_data_glink<size, big_endian>::find_entry( |
1251 | const Symbol* gsym, | |
1252 | const elfcpp::Rela<size, big_endian>& reloc, | |
d1a8cabd | 1253 | const Sized_relobj<size, big_endian>* object) const |
cf43a2fe | 1254 | { |
d1a8cabd | 1255 | Glink_sym_ent ent(gsym, reloc, object); |
cf43a2fe AM |
1256 | typename Glink_entries::const_iterator p = this->glink_entries_.find(ent); |
1257 | gold_assert(p != this->glink_entries_.end()); | |
1258 | return p->second; | |
1259 | } | |
1260 | ||
1261 | template<int size, bool big_endian> | |
1262 | void | |
1263 | Output_data_glink<size, big_endian>::set_final_data_size() | |
1264 | { | |
1265 | unsigned int count = this->glink_entries_.size(); | |
1266 | off_t total = count; | |
1267 | ||
1268 | if (count != 0) | |
1269 | { | |
1270 | if (size == 32) | |
1271 | { | |
1272 | total *= 16; | |
1273 | this->pltresolve_ = total; | |
1274 | ||
1275 | // space for branch table | |
1276 | total += 4 * (count - 1); | |
1277 | ||
1278 | total += -total & 15; | |
1279 | total += this->pltresolve_size; | |
1280 | } | |
1281 | else | |
1282 | { | |
1283 | total *= 32; | |
1284 | this->pltresolve_ = total; | |
1285 | total += this->pltresolve_size; | |
1286 | ||
1287 | // space for branch table | |
1288 | total += 8 * count; | |
1289 | if (count > 0x8000) | |
1290 | total += 4 * (count - 0x8000); | |
1291 | } | |
1292 | } | |
1293 | ||
1294 | this->set_data_size(total); | |
1295 | } | |
1296 | ||
1297 | static inline uint32_t | |
1298 | l(uint32_t a) | |
1299 | { | |
1300 | return a & 0xffff; | |
1301 | } | |
1302 | ||
1303 | static inline uint32_t | |
1304 | hi(uint32_t a) | |
1305 | { | |
1306 | return l(a >> 16); | |
1307 | } | |
1308 | ||
1309 | static inline uint32_t | |
1310 | ha(uint32_t a) | |
1311 | { | |
1312 | return hi(a + 0x8000); | |
1313 | } | |
1314 | ||
1315 | template<bool big_endian> | |
1316 | static inline void | |
1317 | write_insn(unsigned char *p, uint32_t v) | |
1318 | { | |
1319 | elfcpp::Swap<32, big_endian>::writeval(p, v); | |
1320 | } | |
1321 | ||
1322 | // Write out .glink. | |
1323 | ||
1324 | template<int size, bool big_endian> | |
1325 | void | |
1326 | Output_data_glink<size, big_endian>::do_write(Output_file* of) | |
1327 | { | |
1328 | const off_t off = this->offset(); | |
42cacb20 DE |
1329 | const section_size_type oview_size = |
1330 | convert_to_section_size_type(this->data_size()); | |
cf43a2fe AM |
1331 | unsigned char* const oview = of->get_output_view(off, oview_size); |
1332 | unsigned char *p; | |
42cacb20 | 1333 | |
cf43a2fe AM |
1334 | // The base address of the .plt section. |
1335 | uint32_t plt_base = this->targ_->plt_section()->address(); | |
1336 | ||
1337 | // The address of _GLOBAL_OFFSET_TABLE_. | |
1338 | const Output_data_got_powerpc<size, big_endian> *got; | |
1339 | typename elfcpp::Elf_types<size>::Elf_Addr g_o_t; | |
1340 | got = this->targ_->got_section(); | |
1341 | g_o_t = got->address() + got->g_o_t(); | |
1342 | ||
1343 | if (size == 64) | |
1344 | { | |
1345 | // Write out call stubs. | |
1346 | typename Glink_entries::const_iterator g; | |
1347 | for (g = this->glink_entries_.begin(); | |
1348 | g != this->glink_entries_.end(); | |
1349 | ++g) | |
1350 | { | |
1351 | uint64_t plt_addr = plt_base + g->first.sym_->plt_offset(); | |
1352 | uint64_t got_addr = g_o_t; | |
1353 | uint64_t pltoff = plt_addr - got_addr; | |
1354 | ||
1355 | if (pltoff + 0x80008000 > 0xffffffff || (pltoff & 7) != 0) | |
1356 | gold_error(_("%s: linkage table error against `%s'"), | |
1357 | g->first.object_->name().c_str(), | |
1358 | g->first.sym_->demangled_name().c_str()); | |
1359 | ||
1360 | p = oview + g->second * this->glink_entry_size(); | |
1361 | if (ha(pltoff) != 0) | |
1362 | { | |
1363 | write_insn<big_endian>(p, addis_12_2 + ha(pltoff)), p += 4; | |
1364 | write_insn<big_endian>(p, std_2_1 + 40), p += 4; | |
1365 | write_insn<big_endian>(p, ld_11_12 + l(pltoff)), p += 4; | |
1366 | if (ha(pltoff + 16) != ha(pltoff)) | |
1367 | { | |
1368 | write_insn<big_endian>(p, addi_12_12 + l(pltoff)), p += 4; | |
1369 | pltoff = 0; | |
1370 | } | |
1371 | write_insn<big_endian>(p, mtctr_11), p += 4; | |
1372 | write_insn<big_endian>(p, ld_2_12 + l(pltoff + 8)), p += 4; | |
1373 | write_insn<big_endian>(p, ld_11_12 + l(pltoff + 16)), p += 4; | |
1374 | write_insn<big_endian>(p, bctr), p += 4; | |
1375 | } | |
1376 | else | |
1377 | { | |
1378 | write_insn<big_endian>(p, std_2_1 + 40), p += 4; | |
1379 | write_insn<big_endian>(p, ld_11_2 + l(pltoff)), p += 4; | |
1380 | if (ha(pltoff + 16) != ha(pltoff)) | |
1381 | { | |
1382 | write_insn<big_endian>(p, addi_2_2 + l(pltoff)), p += 4; | |
1383 | pltoff = 0; | |
1384 | } | |
1385 | write_insn<big_endian>(p, mtctr_11), p += 4; | |
1386 | write_insn<big_endian>(p, ld_11_2 + l(pltoff + 16)), p += 4; | |
1387 | write_insn<big_endian>(p, ld_2_2 + l(pltoff + 8)), p += 4; | |
1388 | write_insn<big_endian>(p, bctr), p += 4; | |
1389 | } | |
1390 | } | |
1391 | ||
1392 | // Write pltresolve stub. | |
1393 | p = oview + this->pltresolve_; | |
1394 | uint64_t after_bcl = this->address() + this->pltresolve_ + 16; | |
1395 | uint64_t pltoff = plt_base - after_bcl; | |
1396 | ||
1397 | elfcpp::Swap<64, big_endian>::writeval(p, pltoff), p += 8; | |
1398 | ||
1399 | write_insn<big_endian>(p, mflr_12), p += 4; | |
1400 | write_insn<big_endian>(p, bcl_20_31), p += 4; | |
1401 | write_insn<big_endian>(p, mflr_11), p += 4; | |
1402 | write_insn<big_endian>(p, ld_2_11 + l(-16)), p += 4; | |
1403 | write_insn<big_endian>(p, mtlr_12), p += 4; | |
1404 | write_insn<big_endian>(p, add_12_2_11), p += 4; | |
1405 | write_insn<big_endian>(p, ld_11_12 + 0), p += 4; | |
1406 | write_insn<big_endian>(p, ld_2_12 + 8), p += 4; | |
1407 | write_insn<big_endian>(p, mtctr_11), p += 4; | |
1408 | write_insn<big_endian>(p, ld_11_12 + 16), p += 4; | |
1409 | write_insn<big_endian>(p, bctr), p += 4; | |
1410 | while (p < oview + this->pltresolve_ + this->pltresolve_size) | |
1411 | write_insn<big_endian>(p, nop), p += 4; | |
1412 | ||
1413 | // Write lazy link call stubs. | |
1414 | uint32_t indx = 0; | |
1415 | while (p < oview + oview_size) | |
1416 | { | |
1417 | if (indx < 0x8000) | |
1418 | { | |
1419 | write_insn<big_endian>(p, li_0_0 + indx), p += 4; | |
1420 | } | |
1421 | else | |
1422 | { | |
1423 | write_insn<big_endian>(p, lis_0_0 + hi(indx)), p += 4; | |
1424 | write_insn<big_endian>(p, ori_0_0_0 + l(indx)), p += 4; | |
1425 | } | |
1426 | uint16_t branch_off = this->pltresolve_ + 8 - (p - oview); | |
1427 | write_insn<big_endian>(p, b + (branch_off & 0x3fffffc)), p += 4; | |
1428 | indx++; | |
1429 | } | |
1430 | } | |
1431 | else | |
1432 | { | |
1433 | // Write out call stubs. | |
1434 | typename Glink_entries::const_iterator g; | |
1435 | for (g = this->glink_entries_.begin(); | |
1436 | g != this->glink_entries_.end(); | |
1437 | ++g) | |
1438 | { | |
1439 | uint32_t plt_addr = plt_base + g->first.sym_->plt_offset(); | |
1440 | uint32_t got_addr; | |
1441 | ||
1442 | p = oview + g->second * this->glink_entry_size(); | |
1443 | if (parameters->options().output_is_position_independent()) | |
1444 | { | |
d1a8cabd AM |
1445 | const Powerpc_relobj<size, big_endian>* object = static_cast |
1446 | <const Powerpc_relobj<size, big_endian>*>(g->first.object_); | |
1447 | if (object != NULL) | |
1448 | { | |
1449 | unsigned int got2 = object->got2_shndx(); | |
1450 | got_addr = (g->first.object_->output_section(got2)->address() | |
1451 | + g->first.object_->output_section_offset(got2) | |
1452 | + g->first.addend_); | |
1453 | } | |
cf43a2fe AM |
1454 | else |
1455 | got_addr = g_o_t; | |
1456 | ||
1457 | uint32_t pltoff = plt_addr - got_addr; | |
1458 | if (ha(pltoff) == 0) | |
1459 | { | |
1460 | write_insn<big_endian>(p + 0, lwz_11_30 + l(pltoff)); | |
1461 | write_insn<big_endian>(p + 4, mtctr_11); | |
1462 | write_insn<big_endian>(p + 8, bctr); | |
1463 | } | |
1464 | else | |
1465 | { | |
1466 | write_insn<big_endian>(p + 0, addis_11_30 + ha(pltoff)); | |
1467 | write_insn<big_endian>(p + 4, lwz_11_11 + l(pltoff)); | |
1468 | write_insn<big_endian>(p + 8, mtctr_11); | |
1469 | write_insn<big_endian>(p + 12, bctr); | |
1470 | } | |
1471 | } | |
1472 | else | |
1473 | { | |
1474 | write_insn<big_endian>(p + 0, lis_11 + ha(plt_addr)); | |
1475 | write_insn<big_endian>(p + 4, lwz_11_11 + l(plt_addr)); | |
1476 | write_insn<big_endian>(p + 8, mtctr_11); | |
1477 | write_insn<big_endian>(p + 12, bctr); | |
1478 | } | |
1479 | } | |
42cacb20 | 1480 | |
cf43a2fe AM |
1481 | // Write out pltresolve branch table. |
1482 | p = oview + this->pltresolve_; | |
1483 | unsigned int the_end = oview_size - this->pltresolve_size; | |
1484 | unsigned char *end_p = oview + the_end; | |
1485 | while (p < end_p - 8 * 4) | |
1486 | write_insn<big_endian>(p, b + end_p - p), p += 4; | |
1487 | while (p < end_p) | |
1488 | write_insn<big_endian>(p, nop), p += 4; | |
42cacb20 | 1489 | |
cf43a2fe AM |
1490 | // Write out pltresolve call stub. |
1491 | if (parameters->options().output_is_position_independent()) | |
42cacb20 | 1492 | { |
cf43a2fe AM |
1493 | uint32_t res0_off = this->pltresolve_; |
1494 | uint32_t after_bcl_off = the_end + 12; | |
1495 | uint32_t bcl_res0 = after_bcl_off - res0_off; | |
1496 | ||
1497 | write_insn<big_endian>(p + 0, addis_11_11 + ha(bcl_res0)); | |
1498 | write_insn<big_endian>(p + 4, mflr_0); | |
1499 | write_insn<big_endian>(p + 8, bcl_20_31); | |
1500 | write_insn<big_endian>(p + 12, addi_11_11 + l(bcl_res0)); | |
1501 | write_insn<big_endian>(p + 16, mflr_12); | |
1502 | write_insn<big_endian>(p + 20, mtlr_0); | |
1503 | write_insn<big_endian>(p + 24, sub_11_11_12); | |
1504 | ||
1505 | uint32_t got_bcl = g_o_t + 4 - (after_bcl_off + this->address()); | |
1506 | ||
1507 | write_insn<big_endian>(p + 28, addis_12_12 + ha(got_bcl)); | |
1508 | if (ha(got_bcl) == ha(got_bcl + 4)) | |
1509 | { | |
1510 | write_insn<big_endian>(p + 32, lwz_0_12 + l(got_bcl)); | |
1511 | write_insn<big_endian>(p + 36, lwz_12_12 + l(got_bcl + 4)); | |
1512 | } | |
1513 | else | |
1514 | { | |
1515 | write_insn<big_endian>(p + 32, lwzu_0_12 + l(got_bcl)); | |
1516 | write_insn<big_endian>(p + 36, lwz_12_12 + 4); | |
1517 | } | |
1518 | write_insn<big_endian>(p + 40, mtctr_0); | |
1519 | write_insn<big_endian>(p + 44, add_0_11_11); | |
1520 | write_insn<big_endian>(p + 48, add_11_0_11); | |
1521 | write_insn<big_endian>(p + 52, bctr); | |
1522 | write_insn<big_endian>(p + 56, nop); | |
1523 | write_insn<big_endian>(p + 60, nop); | |
42cacb20 | 1524 | } |
cf43a2fe | 1525 | else |
42cacb20 | 1526 | { |
cf43a2fe AM |
1527 | uint32_t res0 = this->pltresolve_ + this->address(); |
1528 | ||
1529 | write_insn<big_endian>(p + 0, lis_12 + ha(g_o_t + 4)); | |
1530 | write_insn<big_endian>(p + 4, addis_11_11 + ha(-res0)); | |
1531 | if (ha(g_o_t + 4) == ha(g_o_t + 8)) | |
1532 | write_insn<big_endian>(p + 8, lwz_0_12 + l(g_o_t + 4)); | |
1533 | else | |
1534 | write_insn<big_endian>(p + 8, lwzu_0_12 + l(g_o_t + 4)); | |
1535 | write_insn<big_endian>(p + 12, addi_11_11 + l(-res0)); | |
1536 | write_insn<big_endian>(p + 16, mtctr_0); | |
1537 | write_insn<big_endian>(p + 20, add_0_11_11); | |
1538 | if (ha(g_o_t + 4) == ha(g_o_t + 8)) | |
1539 | write_insn<big_endian>(p + 24, lwz_12_12 + l(g_o_t + 8)); | |
1540 | else | |
1541 | write_insn<big_endian>(p + 24, lwz_12_12 + 4); | |
1542 | write_insn<big_endian>(p + 28, add_11_0_11); | |
1543 | write_insn<big_endian>(p + 32, bctr); | |
1544 | write_insn<big_endian>(p + 36, nop); | |
1545 | write_insn<big_endian>(p + 40, nop); | |
1546 | write_insn<big_endian>(p + 44, nop); | |
1547 | write_insn<big_endian>(p + 48, nop); | |
1548 | write_insn<big_endian>(p + 52, nop); | |
1549 | write_insn<big_endian>(p + 56, nop); | |
1550 | write_insn<big_endian>(p + 60, nop); | |
42cacb20 | 1551 | } |
cf43a2fe | 1552 | p += 64; |
42cacb20 DE |
1553 | } |
1554 | ||
cf43a2fe AM |
1555 | of->write_output_view(off, oview_size, oview); |
1556 | } | |
1557 | ||
1558 | // Create the glink section. | |
42cacb20 | 1559 | |
cf43a2fe AM |
1560 | template<int size, bool big_endian> |
1561 | void | |
1562 | Target_powerpc<size, big_endian>::make_glink_section(Layout* layout) | |
1563 | { | |
1564 | if (this->glink_ == NULL) | |
1565 | { | |
1566 | this->glink_ = new Output_data_glink<size, big_endian>(this); | |
1567 | layout->add_output_section_data(".text", elfcpp::SHT_PROGBITS, | |
1568 | elfcpp::SHF_ALLOC | elfcpp::SHF_EXECINSTR, | |
1569 | this->glink_, ORDER_TEXT, false); | |
1570 | } | |
42cacb20 DE |
1571 | } |
1572 | ||
1573 | // Create a PLT entry for a global symbol. | |
1574 | ||
1575 | template<int size, bool big_endian> | |
1576 | void | |
d83ce4e3 AM |
1577 | Target_powerpc<size, big_endian>::make_plt_entry( |
1578 | Layout* layout, | |
1579 | Symbol* gsym, | |
1580 | const elfcpp::Rela<size, big_endian>& reloc, | |
1581 | const Sized_relobj<size, big_endian>* object) | |
42cacb20 | 1582 | { |
42cacb20 | 1583 | if (this->plt_ == NULL) |
cf43a2fe | 1584 | this->make_plt_section(layout); |
42cacb20 | 1585 | |
cf43a2fe | 1586 | this->plt_->add_entry(gsym); |
612a8d3d | 1587 | |
d1a8cabd | 1588 | this->glink_->add_entry(gsym, reloc, object); |
42cacb20 DE |
1589 | } |
1590 | ||
0e70b911 CC |
1591 | // Return the number of entries in the PLT. |
1592 | ||
1593 | template<int size, bool big_endian> | |
1594 | unsigned int | |
1595 | Target_powerpc<size, big_endian>::plt_entry_count() const | |
1596 | { | |
1597 | if (this->plt_ == NULL) | |
1598 | return 0; | |
1599 | return this->plt_->entry_count(); | |
1600 | } | |
1601 | ||
1602 | // Return the offset of the first non-reserved PLT entry. | |
1603 | ||
1604 | template<int size, bool big_endian> | |
1605 | unsigned int | |
1606 | Target_powerpc<size, big_endian>::first_plt_entry_offset() const | |
1607 | { | |
1608 | return Output_data_plt_powerpc<size, big_endian>::first_plt_entry_offset(); | |
1609 | } | |
1610 | ||
1611 | // Return the size of each PLT entry. | |
1612 | ||
1613 | template<int size, bool big_endian> | |
1614 | unsigned int | |
1615 | Target_powerpc<size, big_endian>::plt_entry_size() const | |
1616 | { | |
1617 | return Output_data_plt_powerpc<size, big_endian>::get_plt_entry_size(); | |
1618 | } | |
1619 | ||
42cacb20 DE |
1620 | // Create a GOT entry for the TLS module index. |
1621 | ||
1622 | template<int size, bool big_endian> | |
1623 | unsigned int | |
6fa2a40b CC |
1624 | Target_powerpc<size, big_endian>::got_mod_index_entry( |
1625 | Symbol_table* symtab, | |
1626 | Layout* layout, | |
1627 | Sized_relobj_file<size, big_endian>* object) | |
42cacb20 DE |
1628 | { |
1629 | if (this->got_mod_index_offset_ == -1U) | |
1630 | { | |
1631 | gold_assert(symtab != NULL && layout != NULL && object != NULL); | |
1632 | Reloc_section* rela_dyn = this->rela_dyn_section(layout); | |
cf43a2fe | 1633 | Output_data_got_powerpc<size, big_endian>* got; |
42cacb20 DE |
1634 | unsigned int got_offset; |
1635 | ||
1636 | got = this->got_section(symtab, layout); | |
cf43a2fe | 1637 | got->reserve_ent(2); |
42cacb20 DE |
1638 | got_offset = got->add_constant(0); |
1639 | rela_dyn->add_local(object, 0, elfcpp::R_POWERPC_DTPMOD, got, | |
1640 | got_offset, 0); | |
1641 | got->add_constant(0); | |
1642 | this->got_mod_index_offset_ = got_offset; | |
1643 | } | |
1644 | return this->got_mod_index_offset_; | |
1645 | } | |
1646 | ||
1647 | // Optimize the TLS relocation type based on what we know about the | |
1648 | // symbol. IS_FINAL is true if the final address of this symbol is | |
1649 | // known at link time. | |
1650 | ||
cf43a2fe AM |
1651 | template<int size, bool big_endian> |
1652 | tls::Tls_optimization | |
1653 | Target_powerpc<size, big_endian>::optimize_tls_reloc(bool, int) | |
42cacb20 DE |
1654 | { |
1655 | // If we are generating a shared library, then we can't do anything | |
1656 | // in the linker. | |
1657 | if (parameters->options().shared()) | |
1658 | return tls::TLSOPT_NONE; | |
cf43a2fe AM |
1659 | // FIXME |
1660 | return tls::TLSOPT_NONE; | |
42cacb20 DE |
1661 | } |
1662 | ||
95a2c8d6 RS |
1663 | // Get the Reference_flags for a particular relocation. |
1664 | ||
1665 | template<int size, bool big_endian> | |
1666 | int | |
d83ce4e3 | 1667 | Target_powerpc<size, big_endian>::Scan::get_reference_flags(unsigned int r_type) |
95a2c8d6 RS |
1668 | { |
1669 | switch (r_type) | |
1670 | { | |
1671 | case elfcpp::R_POWERPC_NONE: | |
1672 | case elfcpp::R_POWERPC_GNU_VTINHERIT: | |
1673 | case elfcpp::R_POWERPC_GNU_VTENTRY: | |
1674 | case elfcpp::R_PPC64_TOC: | |
1675 | // No symbol reference. | |
1676 | return 0; | |
1677 | ||
1678 | case elfcpp::R_POWERPC_ADDR16: | |
1679 | case elfcpp::R_POWERPC_ADDR16_LO: | |
1680 | case elfcpp::R_POWERPC_ADDR16_HI: | |
1681 | case elfcpp::R_POWERPC_ADDR16_HA: | |
1682 | case elfcpp::R_POWERPC_ADDR32: | |
1683 | case elfcpp::R_PPC64_ADDR64: | |
1684 | return Symbol::ABSOLUTE_REF; | |
1685 | ||
1686 | case elfcpp::R_POWERPC_REL24: | |
1687 | case elfcpp::R_PPC_LOCAL24PC: | |
6ce78956 AM |
1688 | case elfcpp::R_POWERPC_REL16: |
1689 | case elfcpp::R_POWERPC_REL16_LO: | |
1690 | case elfcpp::R_POWERPC_REL16_HI: | |
1691 | case elfcpp::R_POWERPC_REL16_HA: | |
95a2c8d6 RS |
1692 | return Symbol::RELATIVE_REF; |
1693 | ||
1694 | case elfcpp::R_PPC_PLTREL24: | |
1695 | return Symbol::FUNCTION_CALL | Symbol::RELATIVE_REF; | |
1696 | ||
1697 | case elfcpp::R_POWERPC_GOT16: | |
1698 | case elfcpp::R_POWERPC_GOT16_LO: | |
1699 | case elfcpp::R_POWERPC_GOT16_HI: | |
1700 | case elfcpp::R_POWERPC_GOT16_HA: | |
1701 | case elfcpp::R_PPC64_TOC16: | |
1702 | case elfcpp::R_PPC64_TOC16_LO: | |
1703 | case elfcpp::R_PPC64_TOC16_HI: | |
1704 | case elfcpp::R_PPC64_TOC16_HA: | |
1705 | case elfcpp::R_PPC64_TOC16_DS: | |
1706 | case elfcpp::R_PPC64_TOC16_LO_DS: | |
1707 | // Absolute in GOT. | |
1708 | return Symbol::ABSOLUTE_REF; | |
1709 | ||
1710 | case elfcpp::R_POWERPC_GOT_TPREL16: | |
1711 | case elfcpp::R_POWERPC_TLS: | |
1712 | return Symbol::TLS_REF; | |
1713 | ||
1714 | case elfcpp::R_POWERPC_COPY: | |
1715 | case elfcpp::R_POWERPC_GLOB_DAT: | |
1716 | case elfcpp::R_POWERPC_JMP_SLOT: | |
1717 | case elfcpp::R_POWERPC_RELATIVE: | |
1718 | case elfcpp::R_POWERPC_DTPMOD: | |
1719 | default: | |
1720 | // Not expected. We will give an error later. | |
1721 | return 0; | |
1722 | } | |
1723 | } | |
1724 | ||
42cacb20 DE |
1725 | // Report an unsupported relocation against a local symbol. |
1726 | ||
1727 | template<int size, bool big_endian> | |
1728 | void | |
1729 | Target_powerpc<size, big_endian>::Scan::unsupported_reloc_local( | |
d83ce4e3 AM |
1730 | Sized_relobj_file<size, big_endian>* object, |
1731 | unsigned int r_type) | |
42cacb20 DE |
1732 | { |
1733 | gold_error(_("%s: unsupported reloc %u against local symbol"), | |
1734 | object->name().c_str(), r_type); | |
1735 | } | |
1736 | ||
1737 | // We are about to emit a dynamic relocation of type R_TYPE. If the | |
1738 | // dynamic linker does not support it, issue an error. | |
1739 | ||
1740 | template<int size, bool big_endian> | |
1741 | void | |
1742 | Target_powerpc<size, big_endian>::Scan::check_non_pic(Relobj* object, | |
1743 | unsigned int r_type) | |
1744 | { | |
1745 | gold_assert(r_type != elfcpp::R_POWERPC_NONE); | |
1746 | ||
1747 | // These are the relocation types supported by glibc for both 32-bit | |
1748 | // and 64-bit powerpc. | |
1749 | switch (r_type) | |
1750 | { | |
1751 | case elfcpp::R_POWERPC_RELATIVE: | |
1752 | case elfcpp::R_POWERPC_GLOB_DAT: | |
1753 | case elfcpp::R_POWERPC_DTPMOD: | |
1754 | case elfcpp::R_POWERPC_DTPREL: | |
1755 | case elfcpp::R_POWERPC_TPREL: | |
1756 | case elfcpp::R_POWERPC_JMP_SLOT: | |
1757 | case elfcpp::R_POWERPC_COPY: | |
1758 | case elfcpp::R_POWERPC_ADDR32: | |
1759 | case elfcpp::R_POWERPC_ADDR24: | |
1760 | case elfcpp::R_POWERPC_REL24: | |
1761 | return; | |
1762 | ||
1763 | default: | |
1764 | break; | |
1765 | } | |
1766 | ||
1767 | if (size == 64) | |
1768 | { | |
1769 | switch (r_type) | |
1770 | { | |
1771 | // These are the relocation types supported only on 64-bit. | |
1772 | case elfcpp::R_PPC64_ADDR64: | |
1773 | case elfcpp::R_PPC64_TPREL16_LO_DS: | |
1774 | case elfcpp::R_PPC64_TPREL16_DS: | |
1775 | case elfcpp::R_POWERPC_TPREL16: | |
1776 | case elfcpp::R_POWERPC_TPREL16_LO: | |
1777 | case elfcpp::R_POWERPC_TPREL16_HI: | |
1778 | case elfcpp::R_POWERPC_TPREL16_HA: | |
1779 | case elfcpp::R_PPC64_TPREL16_HIGHER: | |
1780 | case elfcpp::R_PPC64_TPREL16_HIGHEST: | |
1781 | case elfcpp::R_PPC64_TPREL16_HIGHERA: | |
1782 | case elfcpp::R_PPC64_TPREL16_HIGHESTA: | |
1783 | case elfcpp::R_PPC64_ADDR16_LO_DS: | |
1784 | case elfcpp::R_POWERPC_ADDR16_LO: | |
1785 | case elfcpp::R_POWERPC_ADDR16_HI: | |
1786 | case elfcpp::R_POWERPC_ADDR16_HA: | |
1787 | case elfcpp::R_POWERPC_ADDR30: | |
1788 | case elfcpp::R_PPC64_UADDR64: | |
1789 | case elfcpp::R_POWERPC_UADDR32: | |
1790 | case elfcpp::R_POWERPC_ADDR16: | |
1791 | case elfcpp::R_POWERPC_UADDR16: | |
1792 | case elfcpp::R_PPC64_ADDR16_DS: | |
1793 | case elfcpp::R_PPC64_ADDR16_HIGHER: | |
1794 | case elfcpp::R_PPC64_ADDR16_HIGHEST: | |
1795 | case elfcpp::R_PPC64_ADDR16_HIGHERA: | |
1796 | case elfcpp::R_PPC64_ADDR16_HIGHESTA: | |
1797 | case elfcpp::R_POWERPC_ADDR14_BRTAKEN: | |
1798 | case elfcpp::R_POWERPC_ADDR14_BRNTAKEN: | |
1799 | case elfcpp::R_POWERPC_REL32: | |
1800 | case elfcpp::R_PPC64_REL64: | |
1801 | return; | |
1802 | ||
1803 | default: | |
1804 | break; | |
1805 | } | |
1806 | } | |
1807 | else | |
1808 | { | |
1809 | switch (r_type) | |
1810 | { | |
1811 | // These are the relocation types supported only on 32-bit. | |
1812 | ||
1813 | default: | |
1814 | break; | |
1815 | } | |
1816 | } | |
1817 | ||
1818 | // This prevents us from issuing more than one error per reloc | |
1819 | // section. But we can still wind up issuing more than one | |
1820 | // error per object file. | |
1821 | if (this->issued_non_pic_error_) | |
1822 | return; | |
33aea2fd | 1823 | gold_assert(parameters->options().output_is_position_independent()); |
42cacb20 DE |
1824 | object->error(_("requires unsupported dynamic reloc; " |
1825 | "recompile with -fPIC")); | |
1826 | this->issued_non_pic_error_ = true; | |
1827 | return; | |
1828 | } | |
1829 | ||
1830 | // Scan a relocation for a local symbol. | |
1831 | ||
1832 | template<int size, bool big_endian> | |
1833 | inline void | |
1834 | Target_powerpc<size, big_endian>::Scan::local( | |
d83ce4e3 AM |
1835 | Symbol_table* symtab, |
1836 | Layout* layout, | |
1837 | Target_powerpc<size, big_endian>* target, | |
1838 | Sized_relobj_file<size, big_endian>* object, | |
1839 | unsigned int data_shndx, | |
1840 | Output_section* output_section, | |
1841 | const elfcpp::Rela<size, big_endian>& reloc, | |
1842 | unsigned int r_type, | |
1843 | const elfcpp::Sym<size, big_endian>& lsym) | |
42cacb20 DE |
1844 | { |
1845 | switch (r_type) | |
1846 | { | |
1847 | case elfcpp::R_POWERPC_NONE: | |
1848 | case elfcpp::R_POWERPC_GNU_VTINHERIT: | |
1849 | case elfcpp::R_POWERPC_GNU_VTENTRY: | |
6ce78956 | 1850 | case elfcpp::R_PPC64_TOCSAVE: |
42cacb20 DE |
1851 | break; |
1852 | ||
1853 | case elfcpp::R_PPC64_ADDR64: | |
1854 | case elfcpp::R_POWERPC_ADDR32: | |
1855 | case elfcpp::R_POWERPC_ADDR16_HA: | |
1856 | case elfcpp::R_POWERPC_ADDR16_LO: | |
1857 | // If building a shared library (or a position-independent | |
1858 | // executable), we need to create a dynamic relocation for | |
1859 | // this location. | |
1860 | if (parameters->options().output_is_position_independent()) | |
2e702c99 RM |
1861 | { |
1862 | Reloc_section* rela_dyn = target->rela_dyn_section(layout); | |
42cacb20 DE |
1863 | |
1864 | check_non_pic(object, r_type); | |
2e702c99 RM |
1865 | if (lsym.get_st_type() != elfcpp::STT_SECTION) |
1866 | { | |
1867 | unsigned int r_sym = elfcpp::elf_r_sym<size>(reloc.get_r_info()); | |
1868 | rela_dyn->add_local(object, r_sym, r_type, output_section, | |
42cacb20 DE |
1869 | data_shndx, reloc.get_r_offset(), |
1870 | reloc.get_r_addend()); | |
2e702c99 RM |
1871 | } |
1872 | else | |
1873 | { | |
42cacb20 | 1874 | unsigned int r_sym = elfcpp::elf_r_sym<size>(reloc.get_r_info()); |
2e702c99 RM |
1875 | gold_assert(lsym.get_st_value() == 0); |
1876 | rela_dyn->add_local_relative(object, r_sym, r_type, | |
42cacb20 DE |
1877 | output_section, data_shndx, |
1878 | reloc.get_r_offset(), | |
397b129b | 1879 | reloc.get_r_addend(), false); |
2e702c99 RM |
1880 | } |
1881 | } | |
42cacb20 DE |
1882 | break; |
1883 | ||
1884 | case elfcpp::R_POWERPC_REL24: | |
1885 | case elfcpp::R_PPC_LOCAL24PC: | |
1886 | case elfcpp::R_POWERPC_REL32: | |
6ce78956 AM |
1887 | case elfcpp::R_POWERPC_REL16_LO: |
1888 | case elfcpp::R_POWERPC_REL16_HA: | |
42cacb20 DE |
1889 | break; |
1890 | ||
1891 | case elfcpp::R_POWERPC_GOT16: | |
1892 | case elfcpp::R_POWERPC_GOT16_LO: | |
1893 | case elfcpp::R_POWERPC_GOT16_HI: | |
1894 | case elfcpp::R_POWERPC_GOT16_HA: | |
42cacb20 | 1895 | { |
cf43a2fe AM |
1896 | // The symbol requires a GOT entry. |
1897 | Output_data_got_powerpc<size, big_endian>* got; | |
42cacb20 DE |
1898 | unsigned int r_sym; |
1899 | ||
1900 | got = target->got_section(symtab, layout); | |
1901 | r_sym = elfcpp::elf_r_sym<size>(reloc.get_r_info()); | |
1902 | ||
1903 | // If we are generating a shared object, we need to add a | |
1904 | // dynamic relocation for this symbol's GOT entry. | |
1905 | if (parameters->options().output_is_position_independent()) | |
1906 | { | |
1907 | if (!object->local_has_got_offset(r_sym, GOT_TYPE_STANDARD)) | |
1908 | { | |
1909 | Reloc_section* rela_dyn = target->rela_dyn_section(layout); | |
1910 | unsigned int off; | |
1911 | ||
1912 | off = got->add_constant(0); | |
1913 | object->set_local_got_offset(r_sym, GOT_TYPE_STANDARD, off); | |
1914 | rela_dyn->add_local_relative(object, r_sym, | |
1915 | elfcpp::R_POWERPC_RELATIVE, | |
397b129b | 1916 | got, off, 0, false); |
42cacb20 | 1917 | } |
2e702c99 | 1918 | } |
42cacb20 DE |
1919 | else |
1920 | got->add_local(object, r_sym, GOT_TYPE_STANDARD); | |
1921 | } | |
1922 | break; | |
1923 | ||
cf43a2fe AM |
1924 | case elfcpp::R_PPC64_TOC16: |
1925 | case elfcpp::R_PPC64_TOC16_LO: | |
1926 | case elfcpp::R_PPC64_TOC16_HI: | |
1927 | case elfcpp::R_PPC64_TOC16_HA: | |
1928 | case elfcpp::R_PPC64_TOC16_DS: | |
1929 | case elfcpp::R_PPC64_TOC16_LO_DS: | |
42cacb20 DE |
1930 | case elfcpp::R_PPC64_TOC: |
1931 | // We need a GOT section. | |
1932 | target->got_section(symtab, layout); | |
1933 | break; | |
1934 | ||
1935 | // These are relocations which should only be seen by the | |
1936 | // dynamic linker, and should never be seen here. | |
1937 | case elfcpp::R_POWERPC_COPY: | |
1938 | case elfcpp::R_POWERPC_GLOB_DAT: | |
1939 | case elfcpp::R_POWERPC_JMP_SLOT: | |
1940 | case elfcpp::R_POWERPC_RELATIVE: | |
1941 | case elfcpp::R_POWERPC_DTPMOD: | |
1942 | gold_error(_("%s: unexpected reloc %u in object file"), | |
1943 | object->name().c_str(), r_type); | |
1944 | break; | |
1945 | ||
1946 | default: | |
1947 | unsupported_reloc_local(object, r_type); | |
1948 | break; | |
1949 | } | |
1950 | } | |
1951 | ||
1952 | // Report an unsupported relocation against a global symbol. | |
1953 | ||
1954 | template<int size, bool big_endian> | |
1955 | void | |
1956 | Target_powerpc<size, big_endian>::Scan::unsupported_reloc_global( | |
d83ce4e3 AM |
1957 | Sized_relobj_file<size, big_endian>* object, |
1958 | unsigned int r_type, | |
1959 | Symbol* gsym) | |
42cacb20 DE |
1960 | { |
1961 | gold_error(_("%s: unsupported reloc %u against global symbol %s"), | |
1962 | object->name().c_str(), r_type, gsym->demangled_name().c_str()); | |
1963 | } | |
1964 | ||
1965 | // Scan a relocation for a global symbol. | |
1966 | ||
1967 | template<int size, bool big_endian> | |
1968 | inline void | |
1969 | Target_powerpc<size, big_endian>::Scan::global( | |
d83ce4e3 AM |
1970 | Symbol_table* symtab, |
1971 | Layout* layout, | |
1972 | Target_powerpc<size, big_endian>* target, | |
1973 | Sized_relobj_file<size, big_endian>* object, | |
1974 | unsigned int data_shndx, | |
1975 | Output_section* output_section, | |
1976 | const elfcpp::Rela<size, big_endian>& reloc, | |
1977 | unsigned int r_type, | |
1978 | Symbol* gsym) | |
42cacb20 DE |
1979 | { |
1980 | switch (r_type) | |
1981 | { | |
1982 | case elfcpp::R_POWERPC_NONE: | |
1983 | case elfcpp::R_POWERPC_GNU_VTINHERIT: | |
1984 | case elfcpp::R_POWERPC_GNU_VTENTRY: | |
cf43a2fe | 1985 | case elfcpp::R_PPC_LOCAL24PC: |
42cacb20 DE |
1986 | break; |
1987 | ||
1988 | case elfcpp::R_POWERPC_ADDR16: | |
1989 | case elfcpp::R_POWERPC_ADDR16_LO: | |
1990 | case elfcpp::R_POWERPC_ADDR16_HI: | |
1991 | case elfcpp::R_POWERPC_ADDR16_HA: | |
1992 | case elfcpp::R_POWERPC_ADDR32: | |
1993 | case elfcpp::R_PPC64_ADDR64: | |
1994 | { | |
cf43a2fe AM |
1995 | // Make a PLT entry if necessary. |
1996 | if (gsym->needs_plt_entry()) | |
1997 | { | |
1998 | target->make_plt_entry(layout, gsym, reloc, 0); | |
2e702c99 RM |
1999 | // Since this is not a PC-relative relocation, we may be |
2000 | // taking the address of a function. In that case we need to | |
2001 | // set the entry in the dynamic symbol table to the address of | |
2002 | // the PLT entry. | |
cf43a2fe AM |
2003 | if (size == 32 |
2004 | && gsym->is_from_dynobj() && !parameters->options().shared()) | |
2e702c99 | 2005 | gsym->set_needs_dynsym_value(); |
cf43a2fe AM |
2006 | } |
2007 | // Make a dynamic relocation if necessary. | |
2008 | if (gsym->needs_dynamic_reloc(Scan::get_reference_flags(r_type))) | |
2009 | { | |
2010 | if (gsym->may_need_copy_reloc()) | |
2011 | { | |
2012 | target->copy_reloc(symtab, layout, object, | |
2013 | data_shndx, output_section, gsym, reloc); | |
2014 | } | |
2015 | else if ((r_type == elfcpp::R_POWERPC_ADDR32 | |
42cacb20 | 2016 | || r_type == elfcpp::R_PPC64_ADDR64) |
2e702c99 RM |
2017 | && gsym->can_use_relative_reloc(false)) |
2018 | { | |
2019 | Reloc_section* rela_dyn = target->rela_dyn_section(layout); | |
2020 | rela_dyn->add_global_relative(gsym, elfcpp::R_POWERPC_RELATIVE, | |
42cacb20 DE |
2021 | output_section, object, |
2022 | data_shndx, reloc.get_r_offset(), | |
13cf9988 | 2023 | reloc.get_r_addend(), false); |
2e702c99 RM |
2024 | } |
2025 | else | |
2026 | { | |
2027 | Reloc_section* rela_dyn = target->rela_dyn_section(layout); | |
42cacb20 DE |
2028 | |
2029 | check_non_pic(object, r_type); | |
2030 | if (gsym->is_from_dynobj() | |
2031 | || gsym->is_undefined() | |
2032 | || gsym->is_preemptible()) | |
2033 | rela_dyn->add_global(gsym, r_type, output_section, | |
2034 | object, data_shndx, | |
2035 | reloc.get_r_offset(), | |
2036 | reloc.get_r_addend()); | |
2037 | else | |
2038 | rela_dyn->add_global_relative(gsym, r_type, | |
2039 | output_section, object, | |
2040 | data_shndx, | |
2041 | reloc.get_r_offset(), | |
13cf9988 | 2042 | reloc.get_r_addend(), false); |
2e702c99 RM |
2043 | } |
2044 | } | |
42cacb20 DE |
2045 | } |
2046 | break; | |
2047 | ||
cf43a2fe | 2048 | case elfcpp::R_PPC_PLTREL24: |
42cacb20 | 2049 | case elfcpp::R_POWERPC_REL24: |
42cacb20 | 2050 | { |
cf43a2fe AM |
2051 | if (gsym->needs_plt_entry() |
2052 | || (!gsym->final_value_is_known() | |
2053 | && !(gsym->is_defined() | |
2054 | && !gsym->is_from_dynobj() | |
2055 | && !gsym->is_preemptible()))) | |
d1a8cabd | 2056 | target->make_plt_entry(layout, gsym, reloc, object); |
42cacb20 | 2057 | // Make a dynamic relocation if necessary. |
95a2c8d6 | 2058 | if (gsym->needs_dynamic_reloc(Scan::get_reference_flags(r_type))) |
42cacb20 | 2059 | { |
966d4097 | 2060 | if (gsym->may_need_copy_reloc()) |
42cacb20 DE |
2061 | { |
2062 | target->copy_reloc(symtab, layout, object, | |
2063 | data_shndx, output_section, gsym, | |
2064 | reloc); | |
2065 | } | |
2066 | else | |
2067 | { | |
2068 | Reloc_section* rela_dyn = target->rela_dyn_section(layout); | |
2069 | check_non_pic(object, r_type); | |
2070 | rela_dyn->add_global(gsym, r_type, output_section, object, | |
2071 | data_shndx, reloc.get_r_offset(), | |
2072 | reloc.get_r_addend()); | |
2073 | } | |
2074 | } | |
2075 | } | |
2076 | break; | |
2077 | ||
6ce78956 AM |
2078 | case elfcpp::R_POWERPC_REL16: |
2079 | case elfcpp::R_POWERPC_REL16_LO: | |
2080 | case elfcpp::R_POWERPC_REL16_HI: | |
2081 | case elfcpp::R_POWERPC_REL16_HA: | |
cf43a2fe AM |
2082 | break; |
2083 | ||
42cacb20 DE |
2084 | case elfcpp::R_POWERPC_GOT16: |
2085 | case elfcpp::R_POWERPC_GOT16_LO: | |
2086 | case elfcpp::R_POWERPC_GOT16_HI: | |
2087 | case elfcpp::R_POWERPC_GOT16_HA: | |
42cacb20 | 2088 | { |
cf43a2fe AM |
2089 | // The symbol requires a GOT entry. |
2090 | Output_data_got_powerpc<size, big_endian>* got; | |
42cacb20 DE |
2091 | |
2092 | got = target->got_section(symtab, layout); | |
2e702c99 RM |
2093 | if (gsym->final_value_is_known()) |
2094 | got->add_global(gsym, GOT_TYPE_STANDARD); | |
2095 | else | |
2096 | { | |
2097 | // If this symbol is not fully resolved, we need to add a | |
2098 | // dynamic relocation for it. | |
2099 | Reloc_section* rela_dyn = target->rela_dyn_section(layout); | |
2100 | if (gsym->is_from_dynobj() | |
2101 | || gsym->is_undefined() | |
2102 | || gsym->is_preemptible()) | |
2103 | got->add_global_with_rel(gsym, GOT_TYPE_STANDARD, rela_dyn, | |
83896202 | 2104 | elfcpp::R_POWERPC_GLOB_DAT); |
2e702c99 RM |
2105 | else if (!gsym->has_got_offset(GOT_TYPE_STANDARD)) |
2106 | { | |
42cacb20 DE |
2107 | unsigned int off = got->add_constant(0); |
2108 | ||
2109 | gsym->set_got_offset(GOT_TYPE_STANDARD, off); | |
2110 | rela_dyn->add_global_relative(gsym, elfcpp::R_POWERPC_RELATIVE, | |
13cf9988 | 2111 | got, off, 0, false); |
42cacb20 | 2112 | } |
2e702c99 | 2113 | } |
42cacb20 DE |
2114 | } |
2115 | break; | |
2116 | ||
2117 | case elfcpp::R_PPC64_TOC: | |
cf43a2fe AM |
2118 | case elfcpp::R_PPC64_TOC16: |
2119 | case elfcpp::R_PPC64_TOC16_LO: | |
2120 | case elfcpp::R_PPC64_TOC16_HI: | |
2121 | case elfcpp::R_PPC64_TOC16_HA: | |
2122 | case elfcpp::R_PPC64_TOC16_DS: | |
2123 | case elfcpp::R_PPC64_TOC16_LO_DS: | |
42cacb20 DE |
2124 | // We need a GOT section. |
2125 | target->got_section(symtab, layout); | |
2126 | break; | |
2127 | ||
2128 | case elfcpp::R_POWERPC_GOT_TPREL16: | |
2129 | case elfcpp::R_POWERPC_TLS: | |
2130 | // XXX TLS | |
2131 | break; | |
2132 | ||
2133 | // These are relocations which should only be seen by the | |
2134 | // dynamic linker, and should never be seen here. | |
2135 | case elfcpp::R_POWERPC_COPY: | |
2136 | case elfcpp::R_POWERPC_GLOB_DAT: | |
2137 | case elfcpp::R_POWERPC_JMP_SLOT: | |
2138 | case elfcpp::R_POWERPC_RELATIVE: | |
2139 | case elfcpp::R_POWERPC_DTPMOD: | |
2140 | gold_error(_("%s: unexpected reloc %u in object file"), | |
2141 | object->name().c_str(), r_type); | |
2142 | break; | |
2143 | ||
2144 | default: | |
2145 | unsupported_reloc_global(object, r_type, gsym); | |
2146 | break; | |
2147 | } | |
2148 | } | |
2149 | ||
6d03d481 ST |
2150 | // Process relocations for gc. |
2151 | ||
2152 | template<int size, bool big_endian> | |
2153 | void | |
2154 | Target_powerpc<size, big_endian>::gc_process_relocs( | |
d83ce4e3 AM |
2155 | Symbol_table* symtab, |
2156 | Layout* layout, | |
2157 | Sized_relobj_file<size, big_endian>* object, | |
2158 | unsigned int data_shndx, | |
2159 | unsigned int, | |
2160 | const unsigned char* prelocs, | |
2161 | size_t reloc_count, | |
2162 | Output_section* output_section, | |
2163 | bool needs_special_offset_handling, | |
2164 | size_t local_symbol_count, | |
2165 | const unsigned char* plocal_symbols) | |
6d03d481 ST |
2166 | { |
2167 | typedef Target_powerpc<size, big_endian> Powerpc; | |
2ea97941 | 2168 | typedef typename Target_powerpc<size, big_endian>::Scan Scan; |
6d03d481 | 2169 | |
41cbeecc | 2170 | gold::gc_process_relocs<size, big_endian, Powerpc, elfcpp::SHT_RELA, Scan, |
3ff2ccb0 | 2171 | typename Target_powerpc::Relocatable_size_for_reloc>( |
6d03d481 ST |
2172 | symtab, |
2173 | layout, | |
2174 | this, | |
2175 | object, | |
2176 | data_shndx, | |
2177 | prelocs, | |
2178 | reloc_count, | |
2179 | output_section, | |
2180 | needs_special_offset_handling, | |
2181 | local_symbol_count, | |
2182 | plocal_symbols); | |
2183 | } | |
2184 | ||
42cacb20 DE |
2185 | // Scan relocations for a section. |
2186 | ||
2187 | template<int size, bool big_endian> | |
2188 | void | |
2189 | Target_powerpc<size, big_endian>::scan_relocs( | |
d83ce4e3 AM |
2190 | Symbol_table* symtab, |
2191 | Layout* layout, | |
2192 | Sized_relobj_file<size, big_endian>* object, | |
2193 | unsigned int data_shndx, | |
2194 | unsigned int sh_type, | |
2195 | const unsigned char* prelocs, | |
2196 | size_t reloc_count, | |
2197 | Output_section* output_section, | |
2198 | bool needs_special_offset_handling, | |
2199 | size_t local_symbol_count, | |
2200 | const unsigned char* plocal_symbols) | |
42cacb20 DE |
2201 | { |
2202 | typedef Target_powerpc<size, big_endian> Powerpc; | |
2ea97941 | 2203 | typedef typename Target_powerpc<size, big_endian>::Scan Scan; |
42cacb20 DE |
2204 | |
2205 | if (sh_type == elfcpp::SHT_REL) | |
2206 | { | |
2207 | gold_error(_("%s: unsupported REL reloc section"), | |
2208 | object->name().c_str()); | |
2209 | return; | |
2210 | } | |
2211 | ||
cf43a2fe AM |
2212 | if (size == 32) |
2213 | { | |
2214 | static Output_data_space* sdata; | |
2215 | ||
2216 | // Define _SDA_BASE_ at the start of the .sdata section. | |
2217 | if (sdata == NULL) | |
2218 | { | |
2219 | // layout->find_output_section(".sdata") == NULL | |
2220 | sdata = new Output_data_space(4, "** sdata"); | |
2221 | Output_section* os | |
2222 | = layout->add_output_section_data(".sdata", 0, | |
2223 | elfcpp::SHF_ALLOC | |
2224 | | elfcpp::SHF_WRITE, | |
2225 | sdata, ORDER_SMALL_DATA, false); | |
2226 | symtab->define_in_output_data("_SDA_BASE_", NULL, | |
2227 | Symbol_table::PREDEFINED, | |
2228 | os, 32768, 0, elfcpp::STT_OBJECT, | |
2229 | elfcpp::STB_LOCAL, elfcpp::STV_HIDDEN, | |
2230 | 0, false, false); | |
2231 | } | |
2232 | } | |
42cacb20 | 2233 | |
2ea97941 | 2234 | gold::scan_relocs<size, big_endian, Powerpc, elfcpp::SHT_RELA, Scan>( |
42cacb20 DE |
2235 | symtab, |
2236 | layout, | |
2237 | this, | |
2238 | object, | |
2239 | data_shndx, | |
2240 | prelocs, | |
2241 | reloc_count, | |
2242 | output_section, | |
2243 | needs_special_offset_handling, | |
2244 | local_symbol_count, | |
2245 | plocal_symbols); | |
2246 | } | |
2247 | ||
2248 | // Finalize the sections. | |
2249 | ||
2250 | template<int size, bool big_endian> | |
2251 | void | |
d5b40221 DK |
2252 | Target_powerpc<size, big_endian>::do_finalize_sections( |
2253 | Layout* layout, | |
f59f41f3 DK |
2254 | const Input_objects*, |
2255 | Symbol_table*) | |
42cacb20 DE |
2256 | { |
2257 | // Fill in some more dynamic tags. | |
ea715a34 ILT |
2258 | const Reloc_section* rel_plt = (this->plt_ == NULL |
2259 | ? NULL | |
2260 | : this->plt_->rel_plt()); | |
2261 | layout->add_target_dynamic_tags(false, this->plt_, rel_plt, | |
612a8d3d | 2262 | this->rela_dyn_, true, size == 32); |
42cacb20 | 2263 | |
cf43a2fe AM |
2264 | if (size == 32) |
2265 | { | |
2266 | this->got_->finalize_data_size(); | |
2267 | Output_data_dynamic* odyn = layout->dynamic_data(); | |
2268 | odyn->add_section_plus_offset(elfcpp::DT_PPC_GOT, | |
2269 | this->got_, this->got_->g_o_t()); | |
2270 | } | |
2271 | ||
42cacb20 DE |
2272 | // Emit any relocs we saved in an attempt to avoid generating COPY |
2273 | // relocs. | |
2274 | if (this->copy_relocs_.any_saved_relocs()) | |
2275 | this->copy_relocs_.emit(this->rela_dyn_section(layout)); | |
2276 | } | |
2277 | ||
2278 | // Perform a relocation. | |
2279 | ||
2280 | template<int size, bool big_endian> | |
2281 | inline bool | |
2282 | Target_powerpc<size, big_endian>::Relocate::relocate( | |
d83ce4e3 AM |
2283 | const Relocate_info<size, big_endian>* relinfo, |
2284 | Target_powerpc* target, | |
2285 | Output_section* os, | |
2286 | size_t relnum, | |
2287 | const elfcpp::Rela<size, big_endian>& rela, | |
2288 | unsigned int r_type, | |
2289 | const Sized_symbol<size>* gsym, | |
2290 | const Symbol_value<size>* psymval, | |
2291 | unsigned char* view, | |
2292 | typename elfcpp::Elf_types<size>::Elf_Addr address, | |
2293 | section_size_type /* view_size */) | |
42cacb20 DE |
2294 | { |
2295 | const unsigned int toc_base_offset = 0x8000; | |
2296 | typedef Powerpc_relocate_functions<size, big_endian> Reloc; | |
cf43a2fe AM |
2297 | const Powerpc_relobj<size, big_endian>* const object |
2298 | = static_cast<const Powerpc_relobj<size, big_endian>*>(relinfo->object); | |
2299 | elfcpp::Elf_Xword value; | |
2300 | ||
2301 | if (r_type == elfcpp::R_POWERPC_GOT16 | |
2302 | || r_type == elfcpp::R_POWERPC_GOT16_LO | |
2303 | || r_type == elfcpp::R_POWERPC_GOT16_HI | |
2304 | || r_type == elfcpp::R_POWERPC_GOT16_HA | |
2305 | || r_type == elfcpp::R_PPC64_GOT16_DS | |
2306 | || r_type == elfcpp::R_PPC64_GOT16_LO_DS) | |
42cacb20 | 2307 | { |
cf43a2fe AM |
2308 | if (gsym != NULL) |
2309 | { | |
2310 | gold_assert(gsym->has_got_offset(GOT_TYPE_STANDARD)); | |
2311 | value = gsym->got_offset(GOT_TYPE_STANDARD); | |
2312 | } | |
2313 | else | |
2314 | { | |
2315 | unsigned int r_sym = elfcpp::elf_r_sym<size>(rela.get_r_info()); | |
2316 | gold_assert(object->local_has_got_offset(r_sym, GOT_TYPE_STANDARD)); | |
2317 | value = object->local_got_offset(r_sym, GOT_TYPE_STANDARD); | |
2318 | } | |
2319 | value -= target->got_section()->g_o_t(); | |
2320 | } | |
2321 | else if (r_type == elfcpp::R_PPC64_TOC) | |
2322 | { | |
2323 | value = target->got_section()->address() + toc_base_offset; | |
2324 | } | |
2325 | else if (gsym != NULL | |
2326 | && (r_type == elfcpp::R_POWERPC_REL24 | |
2327 | || r_type == elfcpp::R_PPC_PLTREL24) | |
2328 | && gsym->use_plt_offset(Scan::get_reference_flags(r_type))) | |
2329 | { | |
2330 | const Output_data_glink<size, big_endian>* glink; | |
2331 | ||
2332 | glink = target->glink_section(); | |
d1a8cabd | 2333 | unsigned int glink_index = glink->find_entry(gsym, rela, object); |
cf43a2fe AM |
2334 | value = glink->address() + glink_index * glink->glink_entry_size(); |
2335 | } | |
2336 | else | |
2337 | { | |
2338 | elfcpp::Elf_Xword addend = 0; | |
2339 | if (r_type != elfcpp::R_PPC_PLTREL24) | |
2340 | addend = rela.get_r_addend(); | |
2341 | value = psymval->value(object, addend); | |
42cacb20 DE |
2342 | } |
2343 | ||
42cacb20 DE |
2344 | switch (r_type) |
2345 | { | |
2346 | case elfcpp::R_PPC64_TOC16: | |
2347 | case elfcpp::R_PPC64_TOC16_LO: | |
2348 | case elfcpp::R_PPC64_TOC16_HI: | |
2349 | case elfcpp::R_PPC64_TOC16_HA: | |
2350 | case elfcpp::R_PPC64_TOC16_DS: | |
2351 | case elfcpp::R_PPC64_TOC16_LO_DS: | |
cf43a2fe AM |
2352 | // Subtract the TOC base address. |
2353 | value -= target->got_section()->address() + toc_base_offset; | |
42cacb20 DE |
2354 | break; |
2355 | ||
cf43a2fe AM |
2356 | case elfcpp::R_POWERPC_SECTOFF: |
2357 | case elfcpp::R_POWERPC_SECTOFF_LO: | |
2358 | case elfcpp::R_POWERPC_SECTOFF_HI: | |
2359 | case elfcpp::R_POWERPC_SECTOFF_HA: | |
2360 | case elfcpp::R_PPC64_SECTOFF_DS: | |
2361 | case elfcpp::R_PPC64_SECTOFF_LO_DS: | |
2362 | if (os != NULL) | |
2363 | value -= os->address(); | |
42cacb20 DE |
2364 | break; |
2365 | ||
2366 | default: | |
2367 | break; | |
2368 | } | |
2369 | ||
2370 | switch (r_type) | |
2371 | { | |
2372 | case elfcpp::R_POWERPC_NONE: | |
2373 | case elfcpp::R_POWERPC_GNU_VTINHERIT: | |
2374 | case elfcpp::R_POWERPC_GNU_VTENTRY: | |
2375 | break; | |
2376 | ||
2377 | case elfcpp::R_POWERPC_REL32: | |
cf43a2fe | 2378 | Reloc::rel32(view, value, 0, address); |
42cacb20 DE |
2379 | break; |
2380 | ||
2381 | case elfcpp::R_POWERPC_REL24: | |
42cacb20 | 2382 | case elfcpp::R_PPC_PLTREL24: |
cf43a2fe AM |
2383 | case elfcpp::R_PPC_LOCAL24PC: |
2384 | Reloc::rel24(view, value, 0, address); | |
42cacb20 DE |
2385 | break; |
2386 | ||
cf43a2fe AM |
2387 | case elfcpp::R_POWERPC_REL14: |
2388 | Reloc::rel14(view, value, 0, address); | |
42cacb20 DE |
2389 | break; |
2390 | ||
2391 | case elfcpp::R_PPC64_ADDR64: | |
cf43a2fe AM |
2392 | case elfcpp::R_PPC64_TOC: |
2393 | Relocate_functions<size, big_endian>::rela64(view, value, 0); | |
42cacb20 DE |
2394 | break; |
2395 | ||
2396 | case elfcpp::R_POWERPC_ADDR32: | |
cf43a2fe | 2397 | Relocate_functions<size, big_endian>::rela32(view, value, 0); |
42cacb20 DE |
2398 | break; |
2399 | ||
cf43a2fe AM |
2400 | case elfcpp::R_POWERPC_ADDR16: |
2401 | case elfcpp::R_PPC64_TOC16: | |
42cacb20 | 2402 | case elfcpp::R_POWERPC_GOT16: |
cf43a2fe AM |
2403 | case elfcpp::R_POWERPC_SECTOFF: |
2404 | Reloc::addr16(view, value, 0); | |
42cacb20 DE |
2405 | break; |
2406 | ||
cf43a2fe AM |
2407 | case elfcpp::R_POWERPC_ADDR16_LO: |
2408 | case elfcpp::R_PPC64_TOC16_LO: | |
42cacb20 | 2409 | case elfcpp::R_POWERPC_GOT16_LO: |
cf43a2fe AM |
2410 | case elfcpp::R_POWERPC_SECTOFF_LO: |
2411 | Reloc::addr16_lo(view, value, 0); | |
42cacb20 DE |
2412 | break; |
2413 | ||
cf43a2fe AM |
2414 | case elfcpp::R_POWERPC_ADDR16_HI: |
2415 | case elfcpp::R_PPC64_TOC16_HI: | |
42cacb20 | 2416 | case elfcpp::R_POWERPC_GOT16_HI: |
cf43a2fe AM |
2417 | case elfcpp::R_POWERPC_SECTOFF_HI: |
2418 | Reloc::addr16_hi(view, value, 0); | |
42cacb20 DE |
2419 | break; |
2420 | ||
cf43a2fe AM |
2421 | case elfcpp::R_POWERPC_ADDR16_HA: |
2422 | case elfcpp::R_PPC64_TOC16_HA: | |
42cacb20 | 2423 | case elfcpp::R_POWERPC_GOT16_HA: |
cf43a2fe AM |
2424 | case elfcpp::R_POWERPC_SECTOFF_HA: |
2425 | Reloc::addr16_ha(view, value, 0); | |
42cacb20 DE |
2426 | break; |
2427 | ||
6ce78956 | 2428 | case elfcpp::R_POWERPC_REL16_LO: |
cf43a2fe | 2429 | Reloc::rel16_lo(view, value, 0, address); |
42cacb20 DE |
2430 | break; |
2431 | ||
6ce78956 | 2432 | case elfcpp::R_POWERPC_REL16_HI: |
cf43a2fe | 2433 | Reloc::rel16_hi(view, value, 0, address); |
42cacb20 DE |
2434 | break; |
2435 | ||
6ce78956 | 2436 | case elfcpp::R_POWERPC_REL16_HA: |
cf43a2fe | 2437 | Reloc::rel16_ha(view, value, 0, address); |
42cacb20 DE |
2438 | break; |
2439 | ||
cf43a2fe AM |
2440 | case elfcpp::R_PPC64_ADDR16_DS: |
2441 | case elfcpp::R_PPC64_ADDR16_LO_DS: | |
42cacb20 DE |
2442 | case elfcpp::R_PPC64_TOC16_DS: |
2443 | case elfcpp::R_PPC64_TOC16_LO_DS: | |
cf43a2fe AM |
2444 | case elfcpp::R_PPC64_GOT16_DS: |
2445 | case elfcpp::R_PPC64_GOT16_LO_DS: | |
2446 | case elfcpp::R_PPC64_SECTOFF_DS: | |
2447 | case elfcpp::R_PPC64_SECTOFF_LO_DS: | |
2448 | Reloc::addr16_ds(view, value, 0); | |
42cacb20 DE |
2449 | break; |
2450 | ||
2451 | case elfcpp::R_POWERPC_COPY: | |
2452 | case elfcpp::R_POWERPC_GLOB_DAT: | |
2453 | case elfcpp::R_POWERPC_JMP_SLOT: | |
2454 | case elfcpp::R_POWERPC_RELATIVE: | |
2455 | // This is an outstanding tls reloc, which is unexpected when | |
2456 | // linking. | |
2457 | case elfcpp::R_POWERPC_DTPMOD: | |
2458 | gold_error_at_location(relinfo, relnum, rela.get_r_offset(), | |
2459 | _("unexpected reloc %u in object file"), | |
2460 | r_type); | |
2461 | break; | |
2462 | ||
6ce78956 AM |
2463 | case elfcpp::R_PPC64_TOCSAVE: |
2464 | // For the time being this can be ignored. | |
2465 | break; | |
2466 | ||
42cacb20 DE |
2467 | default: |
2468 | gold_error_at_location(relinfo, relnum, rela.get_r_offset(), | |
2469 | _("unsupported reloc %u"), | |
2470 | r_type); | |
2471 | break; | |
2472 | } | |
2473 | ||
2474 | return true; | |
2475 | } | |
2476 | ||
2477 | // Perform a TLS relocation. | |
2478 | ||
2479 | template<int size, bool big_endian> | |
2480 | inline void | |
2481 | Target_powerpc<size, big_endian>::Relocate::relocate_tls( | |
d83ce4e3 AM |
2482 | const Relocate_info<size, big_endian>* relinfo, |
2483 | Target_powerpc<size, big_endian>* target, | |
2484 | size_t relnum, | |
2485 | const elfcpp::Rela<size, big_endian>& rela, | |
2486 | unsigned int r_type, | |
2487 | const Sized_symbol<size>* gsym, | |
2488 | const Symbol_value<size>* psymval, | |
2489 | unsigned char* view, | |
2490 | typename elfcpp::Elf_types<size>::Elf_Addr address, | |
2491 | section_size_type) | |
42cacb20 DE |
2492 | { |
2493 | Output_segment* tls_segment = relinfo->layout->tls_segment(); | |
6fa2a40b | 2494 | const Sized_relobj_file<size, big_endian>* object = relinfo->object; |
42cacb20 DE |
2495 | |
2496 | const elfcpp::Elf_Xword addend = rela.get_r_addend(); | |
2497 | typename elfcpp::Elf_types<size>::Elf_Addr value = psymval->value(object, 0); | |
2498 | ||
2499 | const bool is_final = | |
2500 | (gsym == NULL | |
2501 | ? !parameters->options().output_is_position_independent() | |
2502 | : gsym->final_value_is_known()); | |
42cacb20 DE |
2503 | |
2504 | switch (r_type) | |
2505 | { | |
2506 | // XXX | |
2507 | } | |
2508 | } | |
2509 | ||
2510 | // Relocate section data. | |
2511 | ||
2512 | template<int size, bool big_endian> | |
2513 | void | |
2514 | Target_powerpc<size, big_endian>::relocate_section( | |
d83ce4e3 AM |
2515 | const Relocate_info<size, big_endian>* relinfo, |
2516 | unsigned int sh_type, | |
2517 | const unsigned char* prelocs, | |
2518 | size_t reloc_count, | |
2519 | Output_section* output_section, | |
2520 | bool needs_special_offset_handling, | |
2521 | unsigned char* view, | |
2522 | typename elfcpp::Elf_types<size>::Elf_Addr address, | |
2523 | section_size_type view_size, | |
2524 | const Reloc_symbol_changes* reloc_symbol_changes) | |
42cacb20 DE |
2525 | { |
2526 | typedef Target_powerpc<size, big_endian> Powerpc; | |
2527 | typedef typename Target_powerpc<size, big_endian>::Relocate Powerpc_relocate; | |
2528 | ||
2529 | gold_assert(sh_type == elfcpp::SHT_RELA); | |
2530 | ||
2531 | gold::relocate_section<size, big_endian, Powerpc, elfcpp::SHT_RELA, | |
d83ce4e3 | 2532 | Powerpc_relocate>( |
42cacb20 DE |
2533 | relinfo, |
2534 | this, | |
2535 | prelocs, | |
2536 | reloc_count, | |
2537 | output_section, | |
2538 | needs_special_offset_handling, | |
2539 | view, | |
2540 | address, | |
364c7fa5 ILT |
2541 | view_size, |
2542 | reloc_symbol_changes); | |
42cacb20 DE |
2543 | } |
2544 | ||
cf43a2fe | 2545 | class Powerpc_scan_relocatable_reloc |
42cacb20 | 2546 | { |
cf43a2fe AM |
2547 | public: |
2548 | // Return the strategy to use for a local symbol which is not a | |
2549 | // section symbol, given the relocation type. | |
2550 | inline Relocatable_relocs::Reloc_strategy | |
2551 | local_non_section_strategy(unsigned int r_type, Relobj*, unsigned int r_sym) | |
2552 | { | |
2553 | if (r_type == 0 && r_sym == 0) | |
2554 | return Relocatable_relocs::RELOC_DISCARD; | |
2555 | return Relocatable_relocs::RELOC_COPY; | |
2556 | } | |
2557 | ||
2558 | // Return the strategy to use for a local symbol which is a section | |
2559 | // symbol, given the relocation type. | |
2560 | inline Relocatable_relocs::Reloc_strategy | |
2561 | local_section_strategy(unsigned int, Relobj*) | |
2562 | { | |
2563 | return Relocatable_relocs::RELOC_ADJUST_FOR_SECTION_RELA; | |
2564 | } | |
2565 | ||
2566 | // Return the strategy to use for a global symbol, given the | |
2567 | // relocation type, the object, and the symbol index. | |
2568 | inline Relocatable_relocs::Reloc_strategy | |
2569 | global_strategy(unsigned int r_type, Relobj*, unsigned int) | |
2570 | { | |
2571 | if (r_type == elfcpp::R_PPC_PLTREL24) | |
2572 | return Relocatable_relocs::RELOC_SPECIAL; | |
2573 | return Relocatable_relocs::RELOC_COPY; | |
2574 | } | |
2575 | }; | |
42cacb20 DE |
2576 | |
2577 | // Scan the relocs during a relocatable link. | |
2578 | ||
2579 | template<int size, bool big_endian> | |
2580 | void | |
2581 | Target_powerpc<size, big_endian>::scan_relocatable_relocs( | |
d83ce4e3 AM |
2582 | Symbol_table* symtab, |
2583 | Layout* layout, | |
2584 | Sized_relobj_file<size, big_endian>* object, | |
2585 | unsigned int data_shndx, | |
2586 | unsigned int sh_type, | |
2587 | const unsigned char* prelocs, | |
2588 | size_t reloc_count, | |
2589 | Output_section* output_section, | |
2590 | bool needs_special_offset_handling, | |
2591 | size_t local_symbol_count, | |
2592 | const unsigned char* plocal_symbols, | |
2593 | Relocatable_relocs* rr) | |
42cacb20 DE |
2594 | { |
2595 | gold_assert(sh_type == elfcpp::SHT_RELA); | |
2596 | ||
42cacb20 | 2597 | gold::scan_relocatable_relocs<size, big_endian, elfcpp::SHT_RELA, |
d83ce4e3 | 2598 | Powerpc_scan_relocatable_reloc>( |
42cacb20 DE |
2599 | symtab, |
2600 | layout, | |
2601 | object, | |
2602 | data_shndx, | |
2603 | prelocs, | |
2604 | reloc_count, | |
2605 | output_section, | |
2606 | needs_special_offset_handling, | |
2607 | local_symbol_count, | |
2608 | plocal_symbols, | |
2609 | rr); | |
2610 | } | |
2611 | ||
2612 | // Relocate a section during a relocatable link. | |
2613 | ||
2614 | template<int size, bool big_endian> | |
2615 | void | |
2616 | Target_powerpc<size, big_endian>::relocate_for_relocatable( | |
2617 | const Relocate_info<size, big_endian>* relinfo, | |
2618 | unsigned int sh_type, | |
2619 | const unsigned char* prelocs, | |
2620 | size_t reloc_count, | |
2621 | Output_section* output_section, | |
2622 | off_t offset_in_output_section, | |
2623 | const Relocatable_relocs* rr, | |
cf43a2fe AM |
2624 | unsigned char*, |
2625 | typename elfcpp::Elf_types<size>::Elf_Addr, | |
2626 | section_size_type, | |
42cacb20 DE |
2627 | unsigned char* reloc_view, |
2628 | section_size_type reloc_view_size) | |
2629 | { | |
2630 | gold_assert(sh_type == elfcpp::SHT_RELA); | |
2631 | ||
cf43a2fe AM |
2632 | typedef typename elfcpp::Elf_types<size>::Elf_Addr Address; |
2633 | typedef typename Reloc_types<elfcpp::SHT_RELA, size, big_endian>::Reloc | |
2634 | Reltype; | |
2635 | typedef typename Reloc_types<elfcpp::SHT_RELA, size, big_endian>::Reloc_write | |
2636 | Reltype_write; | |
2637 | const int reloc_size | |
2638 | = Reloc_types<elfcpp::SHT_RELA, size, big_endian>::reloc_size; | |
2639 | const Address invalid_address = static_cast<Address>(0) - 1; | |
2640 | ||
2641 | Powerpc_relobj<size, big_endian>* const object | |
2642 | = static_cast<Powerpc_relobj<size, big_endian>*>(relinfo->object); | |
2643 | const unsigned int local_count = object->local_symbol_count(); | |
2644 | unsigned int got2_shndx = object->got2_shndx(); | |
2645 | typename elfcpp::Elf_types<size>::Elf_Swxword got2_addend = 0; | |
2646 | if (got2_shndx != 0) | |
2647 | got2_addend = object->get_output_section_offset(got2_shndx); | |
2648 | ||
2649 | unsigned char* pwrite = reloc_view; | |
2650 | ||
2651 | for (size_t i = 0; i < reloc_count; ++i, prelocs += reloc_size) | |
2652 | { | |
2653 | Relocatable_relocs::Reloc_strategy strategy = rr->strategy(i); | |
2654 | if (strategy == Relocatable_relocs::RELOC_DISCARD) | |
2655 | continue; | |
2656 | ||
2657 | Reltype reloc(prelocs); | |
2658 | Reltype_write reloc_write(pwrite); | |
2659 | ||
2660 | typename elfcpp::Elf_types<size>::Elf_WXword r_info = reloc.get_r_info(); | |
2661 | const unsigned int r_sym = elfcpp::elf_r_sym<size>(r_info); | |
2662 | const unsigned int r_type = elfcpp::elf_r_type<size>(r_info); | |
2663 | ||
2664 | // Get the new symbol index. | |
2665 | ||
2666 | unsigned int new_symndx; | |
2667 | if (r_sym < local_count) | |
2668 | { | |
2669 | switch (strategy) | |
2670 | { | |
2671 | case Relocatable_relocs::RELOC_COPY: | |
2672 | case Relocatable_relocs::RELOC_SPECIAL: | |
2673 | new_symndx = object->symtab_index(r_sym); | |
2674 | gold_assert(new_symndx != -1U); | |
2675 | break; | |
2676 | ||
2677 | case Relocatable_relocs::RELOC_ADJUST_FOR_SECTION_RELA: | |
2678 | { | |
2679 | // We are adjusting a section symbol. We need to find | |
2680 | // the symbol table index of the section symbol for | |
2681 | // the output section corresponding to input section | |
2682 | // in which this symbol is defined. | |
2683 | gold_assert(r_sym < local_count); | |
2684 | bool is_ordinary; | |
2685 | unsigned int shndx = | |
2686 | object->local_symbol_input_shndx(r_sym, &is_ordinary); | |
2687 | gold_assert(is_ordinary); | |
2688 | Output_section* os = object->output_section(shndx); | |
2689 | gold_assert(os != NULL); | |
2690 | gold_assert(os->needs_symtab_index()); | |
2691 | new_symndx = os->symtab_index(); | |
2692 | } | |
2693 | break; | |
2694 | ||
2695 | default: | |
2696 | gold_unreachable(); | |
2697 | } | |
2698 | } | |
2699 | else | |
2700 | { | |
2701 | const Symbol* gsym = object->global_symbol(r_sym); | |
2702 | gold_assert(gsym != NULL); | |
2703 | if (gsym->is_forwarder()) | |
2704 | gsym = relinfo->symtab->resolve_forwards(gsym); | |
2705 | ||
2706 | gold_assert(gsym->has_symtab_index()); | |
2707 | new_symndx = gsym->symtab_index(); | |
2708 | } | |
2709 | ||
2710 | // Get the new offset--the location in the output section where | |
2711 | // this relocation should be applied. | |
2712 | ||
2713 | Address offset = reloc.get_r_offset(); | |
2714 | Address new_offset; | |
2715 | if (static_cast<Address>(offset_in_output_section) != invalid_address) | |
2716 | new_offset = offset + offset_in_output_section; | |
2717 | else | |
2718 | { | |
2719 | section_offset_type sot_offset = | |
2720 | convert_types<section_offset_type, Address>(offset); | |
2721 | section_offset_type new_sot_offset = | |
2722 | output_section->output_offset(object, relinfo->data_shndx, | |
2723 | sot_offset); | |
2724 | gold_assert(new_sot_offset != -1); | |
2725 | new_offset = new_sot_offset; | |
2726 | } | |
2727 | ||
2728 | reloc_write.put_r_offset(new_offset); | |
2729 | reloc_write.put_r_info(elfcpp::elf_r_info<size>(new_symndx, r_type)); | |
2730 | ||
2731 | // Handle the reloc addend based on the strategy. | |
2732 | typename elfcpp::Elf_types<size>::Elf_Swxword addend; | |
2733 | addend = Reloc_types<elfcpp::SHT_RELA, size, big_endian>:: | |
2734 | get_reloc_addend(&reloc); | |
2735 | ||
2736 | if (strategy == Relocatable_relocs::RELOC_COPY) | |
2737 | ; | |
2738 | else if (strategy == Relocatable_relocs::RELOC_ADJUST_FOR_SECTION_RELA) | |
2739 | { | |
2740 | const Symbol_value<size>* psymval = object->local_symbol(r_sym); | |
2741 | ||
2742 | addend = psymval->value(object, addend); | |
2743 | } | |
2744 | else if (strategy == Relocatable_relocs::RELOC_SPECIAL) | |
2745 | { | |
2746 | if (addend >= 32768) | |
2747 | addend += got2_addend; | |
2748 | } | |
2749 | else | |
2750 | gold_unreachable(); | |
2751 | ||
2752 | Reloc_types<elfcpp::SHT_RELA, size, big_endian>:: | |
2753 | set_reloc_addend(&reloc_write, addend); | |
2754 | ||
2755 | pwrite += reloc_size; | |
2756 | } | |
2757 | ||
2758 | gold_assert(static_cast<section_size_type>(pwrite - reloc_view) | |
2759 | == reloc_view_size); | |
42cacb20 DE |
2760 | } |
2761 | ||
2762 | // Return the value to use for a dynamic which requires special | |
2763 | // treatment. This is how we support equality comparisons of function | |
2764 | // pointers across shared library boundaries, as described in the | |
2765 | // processor specific ABI supplement. | |
2766 | ||
2767 | template<int size, bool big_endian> | |
2768 | uint64_t | |
2769 | Target_powerpc<size, big_endian>::do_dynsym_value(const Symbol* gsym) const | |
2770 | { | |
cf43a2fe AM |
2771 | if (size == 32) |
2772 | { | |
2773 | gold_assert(gsym->is_from_dynobj() && gsym->has_plt_offset()); | |
2774 | return this->plt_section()->address() + gsym->plt_offset(); | |
2775 | } | |
2776 | else | |
2777 | gold_unreachable(); | |
42cacb20 DE |
2778 | } |
2779 | ||
2780 | // The selector for powerpc object files. | |
2781 | ||
2782 | template<int size, bool big_endian> | |
2783 | class Target_selector_powerpc : public Target_selector | |
2784 | { | |
2785 | public: | |
2786 | Target_selector_powerpc() | |
2787 | : Target_selector(elfcpp::EM_NONE, size, big_endian, | |
03ef7571 ILT |
2788 | (size == 64 |
2789 | ? (big_endian ? "elf64-powerpc" : "elf64-powerpcle") | |
2790 | : (big_endian ? "elf32-powerpc" : "elf32-powerpcle")), | |
2791 | (size == 64 | |
2792 | ? (big_endian ? "elf64ppc" : "elf64lppc") | |
2793 | : (big_endian ? "elf32ppc" : "elf32lppc"))) | |
42cacb20 DE |
2794 | { } |
2795 | ||
2e702c99 RM |
2796 | virtual Target* |
2797 | do_recognize(Input_file*, off_t, int machine, int, int) | |
42cacb20 DE |
2798 | { |
2799 | switch (size) | |
2800 | { | |
2801 | case 64: | |
2ea97941 | 2802 | if (machine != elfcpp::EM_PPC64) |
42cacb20 DE |
2803 | return NULL; |
2804 | break; | |
2805 | ||
2806 | case 32: | |
2ea97941 | 2807 | if (machine != elfcpp::EM_PPC) |
42cacb20 DE |
2808 | return NULL; |
2809 | break; | |
2810 | ||
2811 | default: | |
2812 | return NULL; | |
2813 | } | |
2814 | ||
7f055c20 | 2815 | return this->instantiate_target(); |
42cacb20 DE |
2816 | } |
2817 | ||
2e702c99 RM |
2818 | virtual Target* |
2819 | do_instantiate_target() | |
7f055c20 | 2820 | { return new Target_powerpc<size, big_endian>(); } |
42cacb20 DE |
2821 | }; |
2822 | ||
2823 | Target_selector_powerpc<32, true> target_selector_ppc32; | |
2824 | Target_selector_powerpc<32, false> target_selector_ppc32le; | |
2825 | Target_selector_powerpc<64, true> target_selector_ppc64; | |
2826 | Target_selector_powerpc<64, false> target_selector_ppc64le; | |
2827 | ||
2828 | } // End anonymous namespace. |