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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); | |
128 | // Finalize the sections. | |
129 | void | |
f59f41f3 | 130 | do_finalize_sections(Layout*, const Input_objects*, Symbol_table*); |
42cacb20 DE |
131 | |
132 | // Return the value to use for a dynamic which requires special | |
133 | // treatment. | |
134 | uint64_t | |
135 | do_dynsym_value(const Symbol*) const; | |
136 | ||
137 | // Relocate a section. | |
138 | void | |
139 | relocate_section(const Relocate_info<size, big_endian>*, | |
140 | unsigned int sh_type, | |
141 | const unsigned char* prelocs, | |
142 | size_t reloc_count, | |
143 | Output_section* output_section, | |
144 | bool needs_special_offset_handling, | |
145 | unsigned char* view, | |
146 | typename elfcpp::Elf_types<size>::Elf_Addr view_address, | |
364c7fa5 ILT |
147 | section_size_type view_size, |
148 | const Reloc_symbol_changes*); | |
42cacb20 DE |
149 | |
150 | // Scan the relocs during a relocatable link. | |
151 | void | |
ad0f2072 | 152 | scan_relocatable_relocs(Symbol_table* symtab, |
42cacb20 | 153 | Layout* layout, |
6fa2a40b | 154 | Sized_relobj_file<size, big_endian>* object, |
42cacb20 DE |
155 | unsigned int data_shndx, |
156 | unsigned int sh_type, | |
157 | const unsigned char* prelocs, | |
158 | size_t reloc_count, | |
159 | Output_section* output_section, | |
160 | bool needs_special_offset_handling, | |
161 | size_t local_symbol_count, | |
162 | const unsigned char* plocal_symbols, | |
163 | Relocatable_relocs*); | |
164 | ||
165 | // Relocate a section during a relocatable link. | |
166 | void | |
167 | relocate_for_relocatable(const Relocate_info<size, big_endian>*, | |
168 | unsigned int sh_type, | |
169 | const unsigned char* prelocs, | |
170 | size_t reloc_count, | |
171 | Output_section* output_section, | |
172 | off_t offset_in_output_section, | |
173 | const Relocatable_relocs*, | |
cf43a2fe AM |
174 | unsigned char*, |
175 | typename elfcpp::Elf_types<size>::Elf_Addr, | |
176 | section_size_type, | |
42cacb20 DE |
177 | unsigned char* reloc_view, |
178 | section_size_type reloc_view_size); | |
179 | ||
180 | // Return whether SYM is defined by the ABI. | |
181 | bool | |
9c2d0ef9 | 182 | do_is_defined_by_abi(const Symbol* sym) const |
42cacb20 | 183 | { |
cf43a2fe | 184 | return strcmp(sym->name(), "__tls_get_addr") == 0; |
42cacb20 DE |
185 | } |
186 | ||
187 | // Return the size of the GOT section. | |
188 | section_size_type | |
0e70b911 | 189 | got_size() const |
42cacb20 DE |
190 | { |
191 | gold_assert(this->got_ != NULL); | |
192 | return this->got_->data_size(); | |
193 | } | |
194 | ||
cf43a2fe AM |
195 | // Get the PLT section. |
196 | const Output_data_plt_powerpc<size, big_endian>* | |
197 | plt_section() const | |
198 | { | |
199 | gold_assert(this->plt_ != NULL); | |
200 | return this->plt_; | |
201 | } | |
202 | ||
203 | // Get the .glink section. | |
204 | const Output_data_glink<size, big_endian>* | |
205 | glink_section() const | |
206 | { | |
207 | gold_assert(this->glink_ != NULL); | |
208 | return this->glink_; | |
209 | } | |
210 | ||
211 | // Get the GOT section. | |
212 | const Output_data_got_powerpc<size, big_endian>* | |
213 | got_section() const | |
214 | { | |
215 | gold_assert(this->got_ != NULL); | |
216 | return this->got_; | |
217 | } | |
218 | ||
219 | protected: | |
220 | Object* | |
221 | do_make_elf_object(const std::string&, Input_file*, off_t, | |
222 | const elfcpp::Ehdr<size, big_endian>&); | |
223 | ||
0e70b911 CC |
224 | // Return the number of entries in the GOT. |
225 | unsigned int | |
226 | got_entry_count() const | |
227 | { | |
228 | if (this->got_ == NULL) | |
229 | return 0; | |
230 | return this->got_size() / (size / 8); | |
231 | } | |
232 | ||
233 | // Return the number of entries in the PLT. | |
234 | unsigned int | |
235 | plt_entry_count() const; | |
236 | ||
237 | // Return the offset of the first non-reserved PLT entry. | |
238 | unsigned int | |
239 | first_plt_entry_offset() const; | |
240 | ||
241 | // Return the size of each PLT entry. | |
242 | unsigned int | |
243 | plt_entry_size() const; | |
244 | ||
42cacb20 DE |
245 | private: |
246 | ||
247 | // The class which scans relocations. | |
248 | class Scan | |
249 | { | |
250 | public: | |
251 | Scan() | |
252 | : issued_non_pic_error_(false) | |
253 | { } | |
254 | ||
95a2c8d6 RS |
255 | static inline int |
256 | get_reference_flags(unsigned int r_type); | |
257 | ||
42cacb20 | 258 | inline void |
ad0f2072 | 259 | local(Symbol_table* symtab, Layout* layout, Target_powerpc* target, |
6fa2a40b | 260 | Sized_relobj_file<size, big_endian>* object, |
42cacb20 DE |
261 | unsigned int data_shndx, |
262 | Output_section* output_section, | |
263 | const elfcpp::Rela<size, big_endian>& reloc, unsigned int r_type, | |
264 | const elfcpp::Sym<size, big_endian>& lsym); | |
265 | ||
266 | inline void | |
ad0f2072 | 267 | global(Symbol_table* symtab, Layout* layout, Target_powerpc* target, |
6fa2a40b | 268 | Sized_relobj_file<size, big_endian>* object, |
42cacb20 DE |
269 | unsigned int data_shndx, |
270 | Output_section* output_section, | |
271 | const elfcpp::Rela<size, big_endian>& reloc, unsigned int r_type, | |
272 | Symbol* gsym); | |
273 | ||
21bb3914 ST |
274 | inline bool |
275 | local_reloc_may_be_function_pointer(Symbol_table* , Layout* , | |
276 | Target_powerpc* , | |
2e702c99 | 277 | Sized_relobj_file<size, big_endian>* , |
21bb3914 | 278 | unsigned int , |
2e702c99 RM |
279 | Output_section* , |
280 | const elfcpp::Rela<size, big_endian>& , | |
281 | unsigned int , | |
282 | const elfcpp::Sym<size, big_endian>&) | |
21bb3914 ST |
283 | { return false; } |
284 | ||
285 | inline bool | |
286 | global_reloc_may_be_function_pointer(Symbol_table* , Layout* , | |
287 | Target_powerpc* , | |
2e702c99 RM |
288 | Sized_relobj_file<size, big_endian>* , |
289 | unsigned int , | |
290 | Output_section* , | |
291 | const elfcpp::Rela<size, | |
21bb3914 ST |
292 | big_endian>& , |
293 | unsigned int , Symbol*) | |
294 | { return false; } | |
295 | ||
42cacb20 DE |
296 | private: |
297 | static void | |
6fa2a40b | 298 | unsupported_reloc_local(Sized_relobj_file<size, big_endian>*, |
42cacb20 DE |
299 | unsigned int r_type); |
300 | ||
301 | static void | |
6fa2a40b | 302 | unsupported_reloc_global(Sized_relobj_file<size, big_endian>*, |
42cacb20 DE |
303 | unsigned int r_type, Symbol*); |
304 | ||
305 | static void | |
306 | generate_tls_call(Symbol_table* symtab, Layout* layout, | |
307 | Target_powerpc* target); | |
308 | ||
309 | void | |
310 | check_non_pic(Relobj*, unsigned int r_type); | |
311 | ||
312 | // Whether we have issued an error about a non-PIC compilation. | |
313 | bool issued_non_pic_error_; | |
314 | }; | |
315 | ||
316 | // The class which implements relocation. | |
317 | class Relocate | |
318 | { | |
319 | public: | |
320 | // Do a relocation. Return false if the caller should not issue | |
321 | // any warnings about this relocation. | |
322 | inline bool | |
323 | relocate(const Relocate_info<size, big_endian>*, Target_powerpc*, | |
031cdbed ILT |
324 | Output_section*, size_t relnum, |
325 | const elfcpp::Rela<size, big_endian>&, | |
42cacb20 DE |
326 | unsigned int r_type, const Sized_symbol<size>*, |
327 | const Symbol_value<size>*, | |
328 | unsigned char*, | |
329 | typename elfcpp::Elf_types<size>::Elf_Addr, | |
330 | section_size_type); | |
331 | ||
332 | private: | |
333 | // Do a TLS relocation. | |
334 | inline void | |
335 | relocate_tls(const Relocate_info<size, big_endian>*, | |
336 | Target_powerpc* target, | |
2e702c99 | 337 | size_t relnum, const elfcpp::Rela<size, big_endian>&, |
42cacb20 DE |
338 | unsigned int r_type, const Sized_symbol<size>*, |
339 | const Symbol_value<size>*, | |
340 | unsigned char*, | |
341 | typename elfcpp::Elf_types<size>::Elf_Addr, | |
342 | section_size_type); | |
343 | }; | |
344 | ||
345 | // A class which returns the size required for a relocation type, | |
346 | // used while scanning relocs during a relocatable link. | |
347 | class Relocatable_size_for_reloc | |
348 | { | |
349 | public: | |
350 | unsigned int | |
cf43a2fe AM |
351 | get_size_for_reloc(unsigned int, Relobj*) |
352 | { | |
353 | gold_unreachable(); | |
354 | return 0; | |
355 | } | |
42cacb20 DE |
356 | }; |
357 | ||
cf43a2fe AM |
358 | // Adjust TLS relocation type based on the options and whether this |
359 | // is a local symbol. | |
360 | static tls::Tls_optimization | |
361 | optimize_tls_reloc(bool is_final, int r_type); | |
362 | ||
42cacb20 | 363 | // Get the GOT section, creating it if necessary. |
cf43a2fe | 364 | Output_data_got_powerpc<size, big_endian>* |
42cacb20 DE |
365 | got_section(Symbol_table*, Layout*); |
366 | ||
cf43a2fe AM |
367 | // Create glink. |
368 | void | |
369 | make_glink_section(Layout*); | |
42cacb20 | 370 | |
cf43a2fe AM |
371 | // Create the PLT section. |
372 | void | |
373 | make_plt_section(Layout*); | |
42cacb20 DE |
374 | |
375 | // Create a PLT entry for a global symbol. | |
376 | void | |
cf43a2fe AM |
377 | make_plt_entry(Layout*, Symbol*, |
378 | const elfcpp::Rela<size, big_endian>&, | |
379 | const Sized_relobj<size, big_endian>* object); | |
42cacb20 DE |
380 | |
381 | // Create a GOT entry for the TLS module index. | |
382 | unsigned int | |
383 | got_mod_index_entry(Symbol_table* symtab, Layout* layout, | |
6fa2a40b | 384 | Sized_relobj_file<size, big_endian>* object); |
42cacb20 | 385 | |
42cacb20 DE |
386 | // Get the dynamic reloc section, creating it if necessary. |
387 | Reloc_section* | |
388 | rela_dyn_section(Layout*); | |
389 | ||
42cacb20 DE |
390 | // Copy a relocation against a global symbol. |
391 | void | |
ef9beddf | 392 | copy_reloc(Symbol_table* symtab, Layout* layout, |
2e702c99 | 393 | Sized_relobj_file<size, big_endian>* object, |
42cacb20 DE |
394 | unsigned int shndx, Output_section* output_section, |
395 | Symbol* sym, const elfcpp::Rela<size, big_endian>& reloc) | |
396 | { | |
397 | this->copy_relocs_.copy_reloc(symtab, layout, | |
398 | symtab->get_sized_symbol<size>(sym), | |
399 | object, shndx, output_section, | |
400 | reloc, this->rela_dyn_section(layout)); | |
401 | } | |
402 | ||
403 | // Information about this specific target which we pass to the | |
404 | // general Target structure. | |
405 | static Target::Target_info powerpc_info; | |
406 | ||
407 | // The types of GOT entries needed for this platform. | |
0e70b911 CC |
408 | // These values are exposed to the ABI in an incremental link. |
409 | // Do not renumber existing values without changing the version | |
410 | // number of the .gnu_incremental_inputs section. | |
42cacb20 DE |
411 | enum Got_type |
412 | { | |
413 | GOT_TYPE_STANDARD = 0, // GOT entry for a regular symbol | |
414 | GOT_TYPE_TLS_OFFSET = 1, // GOT entry for TLS offset | |
415 | GOT_TYPE_TLS_PAIR = 2, // GOT entry for TLS module/offset pair | |
416 | }; | |
417 | ||
cf43a2fe AM |
418 | // The GOT output section. |
419 | Output_data_got_powerpc<size, big_endian>* got_; | |
420 | // The PLT output section. | |
42cacb20 | 421 | Output_data_plt_powerpc<size, big_endian>* plt_; |
cf43a2fe AM |
422 | // The .glink output section. |
423 | Output_data_glink<size, big_endian>* glink_; | |
424 | // The dynamic reloc output section. | |
42cacb20 DE |
425 | Reloc_section* rela_dyn_; |
426 | // Relocs saved to avoid a COPY reloc. | |
427 | Copy_relocs<elfcpp::SHT_RELA, size, big_endian> copy_relocs_; | |
428 | // Space for variables copied with a COPY reloc. | |
429 | Output_data_space* dynbss_; | |
430 | // Offset of the GOT entry for the TLS module index; | |
431 | unsigned int got_mod_index_offset_; | |
432 | }; | |
433 | ||
434 | template<> | |
435 | Target::Target_info Target_powerpc<32, true>::powerpc_info = | |
436 | { | |
437 | 32, // size | |
438 | true, // is_big_endian | |
439 | elfcpp::EM_PPC, // machine_code | |
440 | false, // has_make_symbol | |
441 | false, // has_resolve | |
442 | false, // has_code_fill | |
443 | true, // is_default_stack_executable | |
b3ce541e | 444 | false, // can_icf_inline_merge_sections |
42cacb20 DE |
445 | '\0', // wrap_char |
446 | "/usr/lib/ld.so.1", // dynamic_linker | |
447 | 0x10000000, // default_text_segment_address | |
448 | 64 * 1024, // abi_pagesize (overridable by -z max-page-size) | |
8a5e3e08 | 449 | 4 * 1024, // common_pagesize (overridable by -z common-page-size) |
2e702c99 RM |
450 | false, // isolate_execinstr |
451 | 0, // rosegment_gap | |
8a5e3e08 ILT |
452 | elfcpp::SHN_UNDEF, // small_common_shndx |
453 | elfcpp::SHN_UNDEF, // large_common_shndx | |
454 | 0, // small_common_section_flags | |
05a352e6 DK |
455 | 0, // large_common_section_flags |
456 | NULL, // attributes_section | |
457 | NULL // attributes_vendor | |
42cacb20 DE |
458 | }; |
459 | ||
460 | template<> | |
461 | Target::Target_info Target_powerpc<32, false>::powerpc_info = | |
462 | { | |
463 | 32, // size | |
464 | false, // is_big_endian | |
465 | elfcpp::EM_PPC, // machine_code | |
466 | false, // has_make_symbol | |
467 | false, // has_resolve | |
468 | false, // has_code_fill | |
469 | true, // is_default_stack_executable | |
b3ce541e | 470 | false, // can_icf_inline_merge_sections |
42cacb20 DE |
471 | '\0', // wrap_char |
472 | "/usr/lib/ld.so.1", // dynamic_linker | |
473 | 0x10000000, // default_text_segment_address | |
474 | 64 * 1024, // abi_pagesize (overridable by -z max-page-size) | |
8a5e3e08 | 475 | 4 * 1024, // common_pagesize (overridable by -z common-page-size) |
2e702c99 RM |
476 | false, // isolate_execinstr |
477 | 0, // rosegment_gap | |
8a5e3e08 ILT |
478 | elfcpp::SHN_UNDEF, // small_common_shndx |
479 | elfcpp::SHN_UNDEF, // large_common_shndx | |
480 | 0, // small_common_section_flags | |
05a352e6 DK |
481 | 0, // large_common_section_flags |
482 | NULL, // attributes_section | |
483 | NULL // attributes_vendor | |
42cacb20 DE |
484 | }; |
485 | ||
486 | template<> | |
487 | Target::Target_info Target_powerpc<64, true>::powerpc_info = | |
488 | { | |
489 | 64, // size | |
490 | true, // is_big_endian | |
491 | elfcpp::EM_PPC64, // machine_code | |
492 | false, // has_make_symbol | |
493 | false, // has_resolve | |
494 | false, // has_code_fill | |
495 | true, // is_default_stack_executable | |
b3ce541e | 496 | false, // can_icf_inline_merge_sections |
42cacb20 DE |
497 | '\0', // wrap_char |
498 | "/usr/lib/ld.so.1", // dynamic_linker | |
499 | 0x10000000, // default_text_segment_address | |
500 | 64 * 1024, // abi_pagesize (overridable by -z max-page-size) | |
8a5e3e08 | 501 | 8 * 1024, // common_pagesize (overridable by -z common-page-size) |
2e702c99 RM |
502 | false, // isolate_execinstr |
503 | 0, // rosegment_gap | |
8a5e3e08 ILT |
504 | elfcpp::SHN_UNDEF, // small_common_shndx |
505 | elfcpp::SHN_UNDEF, // large_common_shndx | |
506 | 0, // small_common_section_flags | |
05a352e6 DK |
507 | 0, // large_common_section_flags |
508 | NULL, // attributes_section | |
509 | NULL // attributes_vendor | |
42cacb20 DE |
510 | }; |
511 | ||
512 | template<> | |
513 | Target::Target_info Target_powerpc<64, false>::powerpc_info = | |
514 | { | |
515 | 64, // size | |
516 | false, // is_big_endian | |
517 | elfcpp::EM_PPC64, // machine_code | |
518 | false, // has_make_symbol | |
519 | false, // has_resolve | |
520 | false, // has_code_fill | |
521 | true, // is_default_stack_executable | |
b3ce541e | 522 | false, // can_icf_inline_merge_sections |
42cacb20 DE |
523 | '\0', // wrap_char |
524 | "/usr/lib/ld.so.1", // dynamic_linker | |
525 | 0x10000000, // default_text_segment_address | |
526 | 64 * 1024, // abi_pagesize (overridable by -z max-page-size) | |
8a5e3e08 | 527 | 8 * 1024, // common_pagesize (overridable by -z common-page-size) |
2e702c99 RM |
528 | false, // isolate_execinstr |
529 | 0, // rosegment_gap | |
8a5e3e08 ILT |
530 | elfcpp::SHN_UNDEF, // small_common_shndx |
531 | elfcpp::SHN_UNDEF, // large_common_shndx | |
532 | 0, // small_common_section_flags | |
05a352e6 DK |
533 | 0, // large_common_section_flags |
534 | NULL, // attributes_section | |
535 | NULL // attributes_vendor | |
42cacb20 DE |
536 | }; |
537 | ||
538 | template<int size, bool big_endian> | |
539 | class Powerpc_relocate_functions | |
540 | { | |
541 | private: | |
cf43a2fe | 542 | // Do a simple RELA relocation |
42cacb20 DE |
543 | template<int valsize> |
544 | static inline void | |
545 | rela(unsigned char* view, | |
546 | unsigned int right_shift, | |
547 | elfcpp::Elf_Xword dst_mask, | |
548 | typename elfcpp::Swap<size, big_endian>::Valtype value, | |
549 | typename elfcpp::Swap<size, big_endian>::Valtype addend) | |
550 | { | |
551 | typedef typename elfcpp::Swap<valsize, big_endian>::Valtype Valtype; | |
552 | Valtype* wv = reinterpret_cast<Valtype*>(view); | |
553 | Valtype val = elfcpp::Swap<valsize, big_endian>::readval(wv); | |
cf43a2fe | 554 | Valtype reloc = (value + addend) >> right_shift; |
42cacb20 DE |
555 | |
556 | val &= ~dst_mask; | |
557 | reloc &= dst_mask; | |
558 | ||
559 | elfcpp::Swap<valsize, big_endian>::writeval(wv, val | reloc); | |
560 | } | |
561 | ||
cf43a2fe | 562 | // Do a simple RELA relocation, unaligned. |
42cacb20 DE |
563 | template<int valsize> |
564 | static inline void | |
cf43a2fe AM |
565 | rela_ua(unsigned char* view, |
566 | unsigned int right_shift, | |
42cacb20 | 567 | elfcpp::Elf_Xword dst_mask, |
cf43a2fe | 568 | typename elfcpp::Swap<size, big_endian>::Valtype value, |
42cacb20 DE |
569 | typename elfcpp::Swap<size, big_endian>::Valtype addend) |
570 | { | |
571 | typedef typename elfcpp::Swap_unaligned<valsize, | |
cf43a2fe | 572 | big_endian>::Valtype Valtype; |
42cacb20 DE |
573 | Valtype* wv = reinterpret_cast<Valtype*>(view); |
574 | Valtype val = elfcpp::Swap<valsize, big_endian>::readval(wv); | |
cf43a2fe | 575 | Valtype reloc = (value + addend) >> right_shift; |
42cacb20 DE |
576 | |
577 | val &= ~dst_mask; | |
578 | reloc &= dst_mask; | |
579 | ||
cf43a2fe | 580 | elfcpp::Swap_unaligned<valsize, big_endian>::writeval(wv, val | reloc); |
42cacb20 DE |
581 | } |
582 | ||
583 | typedef Powerpc_relocate_functions<size, big_endian> This; | |
584 | typedef Relocate_functions<size, big_endian> This_reloc; | |
585 | public: | |
586 | // R_POWERPC_REL32: (Symbol + Addend - Address) | |
587 | static inline void | |
588 | rel32(unsigned char* view, | |
cf43a2fe | 589 | typename elfcpp::Elf_types<size>::Elf_Addr value, |
42cacb20 DE |
590 | typename elfcpp::Elf_types<size>::Elf_Addr addend, |
591 | typename elfcpp::Elf_types<size>::Elf_Addr address) | |
cf43a2fe | 592 | { This_reloc::pcrela32(view, value, addend, address); } |
42cacb20 DE |
593 | |
594 | // R_POWERPC_REL24: (Symbol + Addend - Address) & 0x3fffffc | |
595 | static inline void | |
596 | rel24(unsigned char* view, | |
cf43a2fe | 597 | typename elfcpp::Elf_types<size>::Elf_Addr value, |
42cacb20 DE |
598 | typename elfcpp::Elf_types<size>::Elf_Addr addend, |
599 | typename elfcpp::Elf_types<size>::Elf_Addr address) | |
600 | { | |
cf43a2fe | 601 | This::template rela<32>(view, 0, 0x03fffffc, value - address, addend); |
42cacb20 DE |
602 | } |
603 | ||
604 | // R_POWERPC_REL14: (Symbol + Addend - Address) & 0xfffc | |
605 | static inline void | |
606 | rel14(unsigned char* view, | |
cf43a2fe | 607 | typename elfcpp::Elf_types<size>::Elf_Addr value, |
42cacb20 DE |
608 | typename elfcpp::Elf_types<size>::Elf_Addr addend, |
609 | typename elfcpp::Elf_types<size>::Elf_Addr address) | |
610 | { | |
cf43a2fe | 611 | This::template rela<32>(view, 0, 0xfffc, value - address, addend); |
42cacb20 DE |
612 | } |
613 | ||
614 | // R_POWERPC_ADDR16: (Symbol + Addend) & 0xffff | |
615 | static inline void | |
616 | addr16(unsigned char* view, | |
617 | typename elfcpp::Elf_types<size>::Elf_Addr value, | |
618 | typename elfcpp::Elf_types<size>::Elf_Addr addend) | |
619 | { This_reloc::rela16(view, value, addend); } | |
620 | ||
42cacb20 DE |
621 | // R_POWERPC_ADDR16_DS: (Symbol + Addend) & 0xfffc |
622 | static inline void | |
623 | addr16_ds(unsigned char* view, | |
624 | typename elfcpp::Elf_types<size>::Elf_Addr value, | |
625 | typename elfcpp::Elf_types<size>::Elf_Addr addend) | |
626 | { | |
627 | This::template rela<16>(view, 0, 0xfffc, value, addend); | |
628 | } | |
629 | ||
630 | // R_POWERPC_ADDR16_LO: (Symbol + Addend) & 0xffff | |
631 | static inline void | |
632 | addr16_lo(unsigned char* view, | |
633 | typename elfcpp::Elf_types<size>::Elf_Addr value, | |
634 | typename elfcpp::Elf_types<size>::Elf_Addr addend) | |
635 | { This_reloc::rela16(view, value, addend); } | |
636 | ||
42cacb20 DE |
637 | // R_POWERPC_ADDR16_HI: ((Symbol + Addend) >> 16) & 0xffff |
638 | static inline void | |
639 | addr16_hi(unsigned char* view, | |
640 | typename elfcpp::Elf_types<size>::Elf_Addr value, | |
641 | typename elfcpp::Elf_types<size>::Elf_Addr addend) | |
642 | { | |
643 | This::template rela<16>(view, 16, 0xffff, value, addend); | |
644 | } | |
645 | ||
42cacb20 DE |
646 | // R_POWERPC_ADDR16_HA: Same as R_POWERPC_ADDR16_HI except that if the |
647 | // final value of the low 16 bits of the | |
648 | // relocation is negative, add one. | |
649 | static inline void | |
650 | addr16_ha(unsigned char* view, | |
651 | typename elfcpp::Elf_types<size>::Elf_Addr value, | |
652 | typename elfcpp::Elf_types<size>::Elf_Addr addend) | |
653 | { | |
cf43a2fe | 654 | This::addr16_hi(view, value + 0x8000, addend); |
42cacb20 DE |
655 | } |
656 | ||
657 | // R_PPC_REL16: (Symbol + Addend - Address) & 0xffff | |
658 | static inline void | |
659 | rel16(unsigned char* view, | |
cf43a2fe | 660 | typename elfcpp::Elf_types<size>::Elf_Addr value, |
42cacb20 DE |
661 | typename elfcpp::Elf_types<size>::Elf_Addr addend, |
662 | typename elfcpp::Elf_types<size>::Elf_Addr address) | |
cf43a2fe | 663 | { This_reloc::pcrela16(view, value, addend, address); } |
42cacb20 DE |
664 | |
665 | // R_PPC_REL16_LO: (Symbol + Addend - Address) & 0xffff | |
666 | static inline void | |
667 | rel16_lo(unsigned char* view, | |
cf43a2fe | 668 | typename elfcpp::Elf_types<size>::Elf_Addr value, |
42cacb20 DE |
669 | typename elfcpp::Elf_types<size>::Elf_Addr addend, |
670 | typename elfcpp::Elf_types<size>::Elf_Addr address) | |
cf43a2fe | 671 | { This_reloc::pcrela16(view, value, addend, address); } |
42cacb20 DE |
672 | |
673 | // R_PPC_REL16_HI: ((Symbol + Addend - Address) >> 16) & 0xffff | |
674 | static inline void | |
675 | rel16_hi(unsigned char* view, | |
cf43a2fe | 676 | typename elfcpp::Elf_types<size>::Elf_Addr value, |
42cacb20 DE |
677 | typename elfcpp::Elf_types<size>::Elf_Addr addend, |
678 | typename elfcpp::Elf_types<size>::Elf_Addr address) | |
d83ce4e3 | 679 | { |
cf43a2fe | 680 | This::template rela<16>(view, 16, 0xffff, value - address, addend); |
42cacb20 DE |
681 | } |
682 | ||
683 | // R_PPC_REL16_HA: Same as R_PPC_REL16_HI except that if the | |
684 | // final value of the low 16 bits of the | |
685 | // relocation is negative, add one. | |
686 | static inline void | |
687 | rel16_ha(unsigned char* view, | |
cf43a2fe | 688 | typename elfcpp::Elf_types<size>::Elf_Addr value, |
42cacb20 DE |
689 | typename elfcpp::Elf_types<size>::Elf_Addr addend, |
690 | typename elfcpp::Elf_types<size>::Elf_Addr address) | |
d83ce4e3 | 691 | { |
cf43a2fe AM |
692 | This::rel16_hi(view, value + 0x8000, addend, address); |
693 | } | |
694 | }; | |
695 | ||
696 | // Stash away the index of .got2 in a relocatable object, if such | |
697 | // a section exists. | |
698 | ||
699 | template<int size, bool big_endian> | |
700 | bool | |
701 | Powerpc_relobj<size, big_endian>::do_find_special_sections( | |
702 | Read_symbols_data* sd) | |
703 | { | |
704 | if (size == 32) | |
705 | { | |
706 | const unsigned char* const pshdrs = sd->section_headers->data(); | |
707 | const unsigned char* namesu = sd->section_names->data(); | |
708 | const char* names = reinterpret_cast<const char*>(namesu); | |
709 | section_size_type names_size = sd->section_names_size; | |
710 | const unsigned char* s; | |
711 | ||
712 | s = this->find_shdr(pshdrs, ".got2", names, names_size, NULL); | |
713 | if (s != NULL) | |
714 | { | |
715 | unsigned int ndx = (s - pshdrs) / elfcpp::Elf_sizes<size>::shdr_size; | |
d1a8cabd | 716 | this->got2_section_ = ndx; |
cf43a2fe AM |
717 | } |
718 | } | |
719 | return Sized_relobj_file<size, big_endian>::do_find_special_sections(sd); | |
720 | } | |
721 | ||
722 | // Set up PowerPC target specific relobj. | |
723 | ||
724 | template<int size, bool big_endian> | |
725 | Object* | |
726 | Target_powerpc<size, big_endian>::do_make_elf_object( | |
727 | const std::string& name, | |
728 | Input_file* input_file, | |
729 | off_t offset, const elfcpp::Ehdr<size, big_endian>& ehdr) | |
730 | { | |
731 | int et = ehdr.get_e_type(); | |
732 | if (et == elfcpp::ET_REL) | |
733 | { | |
734 | Powerpc_relobj<size, big_endian>* obj = | |
735 | new Powerpc_relobj<size, big_endian>(name, input_file, offset, ehdr); | |
736 | obj->setup(); | |
737 | return obj; | |
738 | } | |
739 | else if (et == elfcpp::ET_DYN) | |
740 | { | |
741 | Sized_dynobj<size, big_endian>* obj = | |
742 | new Sized_dynobj<size, big_endian>(name, input_file, offset, ehdr); | |
743 | obj->setup(); | |
744 | return obj; | |
745 | } | |
746 | else | |
747 | { | |
748 | gold_error(_("%s: unsupported ELF file type %d"), | |
749 | name.c_str(), et); | |
750 | return NULL; | |
751 | } | |
752 | } | |
753 | ||
754 | template<int size, bool big_endian> | |
755 | class Output_data_got_powerpc : public Output_data_got<size, big_endian> | |
756 | { | |
757 | public: | |
758 | typedef typename elfcpp::Elf_types<size>::Elf_Addr Valtype; | |
759 | typedef Output_data_reloc<elfcpp::SHT_RELA, true, size, big_endian> Rela_dyn; | |
760 | ||
761 | Output_data_got_powerpc(Symbol_table* symtab, Layout* layout) | |
762 | : Output_data_got<size, big_endian>(), | |
763 | symtab_(symtab), layout_(layout), | |
764 | header_ent_cnt_(size == 32 ? 3 : 1), | |
765 | header_index_(size == 32 ? 0x2000 : 0) | |
766 | {} | |
767 | ||
768 | class Got_entry; | |
769 | ||
770 | // Create a new GOT entry and return its offset. | |
771 | unsigned int | |
772 | add_got_entry(Got_entry got_entry) | |
42cacb20 | 773 | { |
cf43a2fe AM |
774 | this->reserve_ent(); |
775 | return Output_data_got<size, big_endian>::add_got_entry(got_entry); | |
776 | } | |
42cacb20 | 777 | |
cf43a2fe AM |
778 | // Create a pair of new GOT entries and return the offset of the first. |
779 | unsigned int | |
780 | add_got_entry_pair(Got_entry got_entry_1, Got_entry got_entry_2) | |
781 | { | |
782 | this->reserve_ent(2); | |
783 | return Output_data_got<size, big_endian>::add_got_entry_pair(got_entry_1, | |
784 | got_entry_2); | |
785 | } | |
42cacb20 | 786 | |
cf43a2fe AM |
787 | // Value of _GLOBAL_OFFSET_TABLE_ |
788 | unsigned int | |
789 | g_o_t() const | |
790 | { | |
791 | return this->got_offset(this->header_index_); | |
42cacb20 | 792 | } |
cf43a2fe AM |
793 | |
794 | // Ensure our GOT has a header. | |
795 | void | |
796 | set_final_data_size() | |
797 | { | |
798 | if (this->header_ent_cnt_ != 0) | |
799 | this->make_header(); | |
800 | Output_data_got<size, big_endian>::set_final_data_size(); | |
801 | } | |
802 | ||
803 | // First word of GOT header needs some values that are not | |
804 | // handled by Output_data_got so poke them in here. | |
805 | // For 32-bit, address of .dynamic, for 64-bit, address of TOCbase. | |
806 | void | |
807 | do_write(Output_file* of) | |
808 | { | |
809 | replace_constant(this->header_index_, | |
810 | (size == 32 | |
811 | ? this->layout_->dynamic_section()->address() | |
812 | : this->address() + 0x8000)); | |
813 | ||
814 | Output_data_got<size, big_endian>::do_write(of); | |
815 | } | |
816 | ||
817 | private: | |
818 | void | |
819 | reserve_ent(unsigned int cnt = 1) | |
820 | { | |
821 | if (this->header_ent_cnt_ == 0) | |
822 | return; | |
823 | if (this->num_entries() + cnt > this->header_index_) | |
824 | this->make_header(); | |
825 | } | |
826 | ||
827 | void | |
828 | make_header() | |
829 | { | |
830 | this->header_ent_cnt_ = 0; | |
831 | this->header_index_ = this->num_entries(); | |
832 | if (size == 32) | |
833 | { | |
834 | Output_data_got<size, big_endian>::add_constant(0); | |
835 | Output_data_got<size, big_endian>::add_constant(0); | |
836 | Output_data_got<size, big_endian>::add_constant(0); | |
837 | ||
838 | // Define _GLOBAL_OFFSET_TABLE_ at the header | |
839 | this->symtab_->define_in_output_data("_GLOBAL_OFFSET_TABLE_", NULL, | |
840 | Symbol_table::PREDEFINED, | |
841 | this, this->g_o_t(), 0, | |
842 | elfcpp::STT_OBJECT, | |
843 | elfcpp::STB_LOCAL, | |
844 | elfcpp::STV_HIDDEN, | |
845 | 0, false, false); | |
846 | } | |
847 | else | |
848 | Output_data_got<size, big_endian>::add_constant(0); | |
849 | } | |
850 | ||
851 | // Stashed pointers. | |
852 | Symbol_table* symtab_; | |
853 | Layout* layout_; | |
854 | ||
855 | // GOT header size. | |
856 | unsigned int header_ent_cnt_; | |
857 | // GOT header index. | |
858 | unsigned int header_index_; | |
42cacb20 DE |
859 | }; |
860 | ||
861 | // Get the GOT section, creating it if necessary. | |
862 | ||
863 | template<int size, bool big_endian> | |
cf43a2fe | 864 | Output_data_got_powerpc<size, big_endian>* |
42cacb20 DE |
865 | Target_powerpc<size, big_endian>::got_section(Symbol_table* symtab, |
866 | Layout* layout) | |
867 | { | |
868 | if (this->got_ == NULL) | |
869 | { | |
870 | gold_assert(symtab != NULL && layout != NULL); | |
871 | ||
cf43a2fe AM |
872 | this->got_ |
873 | = new Output_data_got_powerpc<size, big_endian>(symtab, layout); | |
42cacb20 DE |
874 | |
875 | layout->add_output_section_data(".got", elfcpp::SHT_PROGBITS, | |
876 | elfcpp::SHF_ALLOC | elfcpp::SHF_WRITE, | |
22f0da72 | 877 | this->got_, ORDER_DATA, false); |
42cacb20 DE |
878 | } |
879 | ||
880 | return this->got_; | |
881 | } | |
882 | ||
883 | // Get the dynamic reloc section, creating it if necessary. | |
884 | ||
885 | template<int size, bool big_endian> | |
886 | typename Target_powerpc<size, big_endian>::Reloc_section* | |
887 | Target_powerpc<size, big_endian>::rela_dyn_section(Layout* layout) | |
888 | { | |
889 | if (this->rela_dyn_ == NULL) | |
890 | { | |
891 | gold_assert(layout != NULL); | |
892 | this->rela_dyn_ = new Reloc_section(parameters->options().combreloc()); | |
893 | layout->add_output_section_data(".rela.dyn", elfcpp::SHT_RELA, | |
22f0da72 ILT |
894 | elfcpp::SHF_ALLOC, this->rela_dyn_, |
895 | ORDER_DYNAMIC_RELOCS, false); | |
42cacb20 DE |
896 | } |
897 | return this->rela_dyn_; | |
898 | } | |
899 | ||
900 | // A class to handle the PLT data. | |
901 | ||
902 | template<int size, bool big_endian> | |
cf43a2fe | 903 | class Output_data_plt_powerpc : public Output_section_data_build |
42cacb20 DE |
904 | { |
905 | public: | |
906 | typedef Output_data_reloc<elfcpp::SHT_RELA, true, | |
907 | size, big_endian> Reloc_section; | |
908 | ||
cf43a2fe | 909 | Output_data_plt_powerpc(Layout*, Target_powerpc<size, big_endian>*); |
42cacb20 DE |
910 | |
911 | // Add an entry to the PLT. | |
cf43a2fe AM |
912 | void |
913 | add_entry(Symbol*); | |
42cacb20 DE |
914 | |
915 | // Return the .rela.plt section data. | |
cf43a2fe AM |
916 | const Reloc_section* |
917 | rel_plt() const | |
918 | { | |
42cacb20 DE |
919 | return this->rel_; |
920 | } | |
921 | ||
0e70b911 CC |
922 | // Return the number of PLT entries. |
923 | unsigned int | |
924 | entry_count() const | |
d83ce4e3 AM |
925 | { |
926 | return ((this->current_data_size() - initial_plt_entry_size) | |
927 | / plt_entry_size); | |
928 | } | |
0e70b911 CC |
929 | |
930 | // Return the offset of the first non-reserved PLT entry. | |
931 | static unsigned int | |
932 | first_plt_entry_offset() | |
cf43a2fe | 933 | { return initial_plt_entry_size; } |
0e70b911 CC |
934 | |
935 | // Return the size of a PLT entry. | |
936 | static unsigned int | |
937 | get_plt_entry_size() | |
cf43a2fe | 938 | { return plt_entry_size; } |
0e70b911 | 939 | |
42cacb20 | 940 | protected: |
42cacb20 | 941 | void |
cf43a2fe | 942 | do_adjust_output_section(Output_section* os) |
42cacb20 | 943 | { |
cf43a2fe | 944 | os->set_entsize(0); |
42cacb20 DE |
945 | } |
946 | ||
cf43a2fe AM |
947 | private: |
948 | // The size of an entry in the PLT. | |
949 | static const int plt_entry_size = size == 32 ? 4 : 24; | |
950 | // The size of the first reserved entry. | |
951 | static const int initial_plt_entry_size = size == 32 ? 0 : 24; | |
952 | ||
42cacb20 DE |
953 | // Write out the PLT data. |
954 | void | |
955 | do_write(Output_file*); | |
956 | ||
957 | // The reloc section. | |
958 | Reloc_section* rel_; | |
cf43a2fe AM |
959 | // Allows access to .glink for do_write. |
960 | Target_powerpc<size, big_endian>* targ_; | |
42cacb20 DE |
961 | }; |
962 | ||
cf43a2fe | 963 | // Create the PLT section. |
42cacb20 DE |
964 | |
965 | template<int size, bool big_endian> | |
d83ce4e3 AM |
966 | Output_data_plt_powerpc<size, big_endian>::Output_data_plt_powerpc( |
967 | Layout* layout, | |
968 | Target_powerpc<size, big_endian>* targ) | |
cf43a2fe AM |
969 | : Output_section_data_build(size == 32 ? 4 : 8), |
970 | targ_(targ) | |
42cacb20 DE |
971 | { |
972 | this->rel_ = new Reloc_section(false); | |
973 | layout->add_output_section_data(".rela.plt", elfcpp::SHT_RELA, | |
22f0da72 ILT |
974 | elfcpp::SHF_ALLOC, this->rel_, |
975 | ORDER_DYNAMIC_PLT_RELOCS, false); | |
42cacb20 DE |
976 | } |
977 | ||
42cacb20 DE |
978 | // Add an entry to the PLT. |
979 | ||
980 | template<int size, bool big_endian> | |
981 | void | |
982 | Output_data_plt_powerpc<size, big_endian>::add_entry(Symbol* gsym) | |
983 | { | |
cf43a2fe AM |
984 | if (!gsym->has_plt_offset()) |
985 | { | |
986 | off_t off = this->current_data_size(); | |
987 | ||
988 | if (off == 0) | |
989 | off += initial_plt_entry_size; | |
990 | gsym->set_plt_offset(off); | |
991 | gsym->set_needs_dynsym_entry(); | |
992 | this->rel_->add_global(gsym, elfcpp::R_POWERPC_JMP_SLOT, this, off, 0); | |
993 | off += plt_entry_size; | |
994 | this->set_current_data_size(off); | |
995 | } | |
42cacb20 DE |
996 | } |
997 | ||
d83ce4e3 AM |
998 | static const uint32_t addis_11_11 = 0x3d6b0000; |
999 | static const uint32_t addis_11_30 = 0x3d7e0000; | |
1000 | static const uint32_t addis_12_12 = 0x3d8c0000; | |
1001 | static const uint32_t addi_11_11 = 0x396b0000; | |
1002 | static const uint32_t add_0_11_11 = 0x7c0b5a14; | |
1003 | static const uint32_t add_11_0_11 = 0x7d605a14; | |
1004 | static const uint32_t b = 0x48000000; | |
1005 | static const uint32_t bcl_20_31 = 0x429f0005; | |
1006 | static const uint32_t bctr = 0x4e800420; | |
1007 | static const uint32_t blrl = 0x4e800021; | |
1008 | static const uint32_t lis_11 = 0x3d600000; | |
1009 | static const uint32_t lis_12 = 0x3d800000; | |
1010 | static const uint32_t lwzu_0_12 = 0x840c0000; | |
1011 | static const uint32_t lwz_0_12 = 0x800c0000; | |
1012 | static const uint32_t lwz_11_11 = 0x816b0000; | |
1013 | static const uint32_t lwz_11_30 = 0x817e0000; | |
1014 | static const uint32_t lwz_12_12 = 0x818c0000; | |
1015 | static const uint32_t mflr_0 = 0x7c0802a6; | |
1016 | static const uint32_t mflr_12 = 0x7d8802a6; | |
1017 | static const uint32_t mtctr_0 = 0x7c0903a6; | |
1018 | static const uint32_t mtctr_11 = 0x7d6903a6; | |
1019 | static const uint32_t mtlr_0 = 0x7c0803a6; | |
1020 | static const uint32_t nop = 0x60000000; | |
1021 | static const uint32_t sub_11_11_12 = 0x7d6c5850; | |
1022 | static const uint32_t addis_12_2 = 0x3d820000; | |
1023 | static const uint32_t std_2_1 = 0xf8410000; | |
1024 | static const uint32_t ld_11_12 = 0xe96c0000; | |
1025 | static const uint32_t ld_2_12 = 0xe84c0000; | |
1026 | static const uint32_t addi_12_12 = 0x398c0000; | |
1027 | static const uint32_t ld_11_2 = 0xe9620000; | |
1028 | static const uint32_t addi_2_2 = 0x38420000; | |
1029 | static const uint32_t ld_2_2 = 0xe8420000; | |
1030 | static const uint32_t mflr_11 = 0x7d6802a6; | |
1031 | static const uint32_t ld_2_11 = 0xe84b0000; | |
1032 | static const uint32_t mtlr_12 = 0x7d8803a6; | |
1033 | static const uint32_t add_12_2_11 = 0x7d825a14; | |
1034 | static const uint32_t li_0_0 = 0x38000000; | |
1035 | static const uint32_t lis_0_0 = 0x3c000000; | |
1036 | static const uint32_t ori_0_0_0 = 0x60000000; | |
42cacb20 DE |
1037 | |
1038 | // Write out the PLT. | |
1039 | ||
1040 | template<int size, bool big_endian> | |
1041 | void | |
1042 | Output_data_plt_powerpc<size, big_endian>::do_write(Output_file* of) | |
1043 | { | |
cf43a2fe AM |
1044 | if (size == 32) |
1045 | { | |
1046 | const off_t offset = this->offset(); | |
1047 | const section_size_type oview_size | |
1048 | = convert_to_section_size_type(this->data_size()); | |
1049 | unsigned char* const oview = of->get_output_view(offset, oview_size); | |
1050 | unsigned char* pov = oview; | |
1051 | unsigned char* endpov = oview + oview_size; | |
1052 | ||
1053 | // The address the .glink branch table | |
1054 | const Output_data_glink<size, big_endian>* glink | |
1055 | = this->targ_->glink_section(); | |
1056 | elfcpp::Elf_types<32>::Elf_Addr branch_tab | |
1057 | = glink->address() + glink->pltresolve(); | |
1058 | ||
1059 | while (pov < endpov) | |
1060 | { | |
1061 | elfcpp::Swap<32, big_endian>::writeval(pov, branch_tab); | |
1062 | pov += 4; | |
1063 | branch_tab += 4; | |
1064 | } | |
1065 | ||
1066 | of->write_output_view(offset, oview_size, oview); | |
1067 | } | |
1068 | } | |
1069 | ||
1070 | // Create the PLT section. | |
1071 | ||
1072 | template<int size, bool big_endian> | |
1073 | void | |
1074 | Target_powerpc<size, big_endian>::make_plt_section(Layout* layout) | |
1075 | { | |
1076 | if (this->plt_ == NULL) | |
1077 | { | |
1078 | if (this->glink_ == NULL) | |
1079 | make_glink_section(layout); | |
1080 | ||
1081 | // Ensure that .rela.dyn always appears before .rela.plt This is | |
1082 | // necessary due to how, on PowerPC and some other targets, .rela.dyn | |
1083 | // needs to include .rela.plt in it's range. | |
1084 | this->rela_dyn_section(layout); | |
1085 | ||
1086 | this->plt_ = new Output_data_plt_powerpc<size, big_endian>(layout, this); | |
1087 | layout->add_output_section_data(".plt", | |
1088 | (size == 32 | |
1089 | ? elfcpp::SHT_PROGBITS | |
1090 | : elfcpp::SHT_NOBITS), | |
1091 | elfcpp::SHF_ALLOC | elfcpp::SHF_WRITE, | |
1092 | this->plt_, | |
1093 | (size == 32 | |
1094 | ? ORDER_SMALL_DATA | |
1095 | : ORDER_SMALL_BSS), | |
1096 | false); | |
1097 | } | |
1098 | } | |
1099 | ||
1100 | // A class to handle .glink. | |
1101 | ||
1102 | template<int size, bool big_endian> | |
1103 | class Output_data_glink : public Output_section_data | |
1104 | { | |
1105 | public: | |
1106 | Output_data_glink(Target_powerpc<size, big_endian>*); | |
1107 | ||
1108 | // Add an entry | |
1109 | void | |
1110 | add_entry(const Symbol*, const elfcpp::Rela<size, big_endian>&, | |
d1a8cabd | 1111 | const Sized_relobj<size, big_endian>*); |
cf43a2fe AM |
1112 | |
1113 | unsigned int | |
1114 | find_entry(const Symbol*, const elfcpp::Rela<size, big_endian>&, | |
d1a8cabd | 1115 | const Sized_relobj<size, big_endian>*) const; |
cf43a2fe AM |
1116 | |
1117 | unsigned int | |
1118 | glink_entry_size() const | |
1119 | { | |
1120 | if (size == 32) | |
1121 | return 4 * 4; | |
1122 | else | |
1123 | // FIXME: We should be using multiple glink sections for | |
1124 | // stubs to support > 33M applications. | |
1125 | return 8 * 4; | |
1126 | } | |
1127 | ||
1128 | off_t | |
1129 | pltresolve() const | |
1130 | { | |
1131 | return this->pltresolve_; | |
1132 | } | |
1133 | ||
1134 | private: | |
1135 | static const int pltresolve_size = 16*4; | |
1136 | ||
1137 | void | |
1138 | set_final_data_size(); | |
1139 | ||
1140 | // Write out .glink | |
1141 | void | |
1142 | do_write(Output_file*); | |
1143 | ||
d1a8cabd | 1144 | class Glink_sym_ent |
cf43a2fe | 1145 | { |
d1a8cabd AM |
1146 | public: |
1147 | Glink_sym_ent(const Symbol* sym, | |
cf43a2fe | 1148 | const elfcpp::Rela<size, big_endian>& reloc, |
d1a8cabd AM |
1149 | const Sized_relobj<size, big_endian>* object) |
1150 | : sym_(sym), object_(0), addend_(0) | |
cf43a2fe AM |
1151 | { |
1152 | if (size != 32) | |
1153 | this->addend_ = reloc.get_r_addend(); | |
d1a8cabd AM |
1154 | else if (parameters->options().output_is_position_independent() |
1155 | && (elfcpp::elf_r_type<size>(reloc.get_r_info()) | |
1156 | == elfcpp::R_PPC_PLTREL24)) | |
cf43a2fe | 1157 | { |
d1a8cabd | 1158 | this->addend_ = reloc.get_r_addend(); |
cf43a2fe | 1159 | if (this->addend_ != 0) |
d1a8cabd | 1160 | this->object_ = object; |
cf43a2fe AM |
1161 | } |
1162 | } | |
1163 | ||
d1a8cabd | 1164 | const Symbol* sym_; |
cf43a2fe | 1165 | const Sized_relobj<size, big_endian>* object_; |
cf43a2fe AM |
1166 | unsigned int addend_; |
1167 | ||
1168 | bool operator==(const Glink_sym_ent& that) const | |
1169 | { | |
1170 | return (this->sym_ == that.sym_ | |
1171 | && this->object_ == that.object_ | |
d1a8cabd | 1172 | && this->addend_ == that.addend_); |
cf43a2fe AM |
1173 | } |
1174 | }; | |
1175 | ||
d1a8cabd | 1176 | class Glink_sym_ent_hash |
cf43a2fe | 1177 | { |
d1a8cabd | 1178 | public: |
cf43a2fe AM |
1179 | size_t operator()(const Glink_sym_ent& ent) const |
1180 | { | |
1181 | return (reinterpret_cast<uintptr_t>(ent.sym_) | |
1182 | ^ reinterpret_cast<uintptr_t>(ent.object_) | |
cf43a2fe AM |
1183 | ^ ent.addend_); |
1184 | } | |
1185 | }; | |
1186 | ||
d1a8cabd | 1187 | // Map sym/object/addend to index. |
cf43a2fe AM |
1188 | typedef Unordered_map<Glink_sym_ent, unsigned int, |
1189 | Glink_sym_ent_hash> Glink_entries; | |
1190 | Glink_entries glink_entries_; | |
1191 | ||
1192 | // Offset of pltresolve stub (actually, branch table for 32-bit) | |
1193 | off_t pltresolve_; | |
1194 | ||
1195 | // Allows access to .got and .plt for do_write. | |
1196 | Target_powerpc<size, big_endian>* targ_; | |
1197 | }; | |
1198 | ||
1199 | // Create the glink section. | |
1200 | ||
1201 | template<int size, bool big_endian> | |
d83ce4e3 AM |
1202 | Output_data_glink<size, big_endian>::Output_data_glink( |
1203 | Target_powerpc<size, big_endian>* targ) | |
cf43a2fe AM |
1204 | : Output_section_data(16), |
1205 | pltresolve_(0), targ_(targ) | |
1206 | { | |
1207 | } | |
1208 | ||
1209 | // Add an entry to glink, if we do not already have one for this | |
d1a8cabd | 1210 | // sym/object/addend combo. |
cf43a2fe AM |
1211 | |
1212 | template<int size, bool big_endian> | |
1213 | void | |
d83ce4e3 AM |
1214 | Output_data_glink<size, big_endian>::add_entry( |
1215 | const Symbol* gsym, | |
1216 | const elfcpp::Rela<size, big_endian>& reloc, | |
d1a8cabd | 1217 | const Sized_relobj<size, big_endian>* object) |
cf43a2fe | 1218 | { |
d1a8cabd | 1219 | Glink_sym_ent ent(gsym, reloc, object); |
cf43a2fe | 1220 | unsigned int indx = this->glink_entries_.size(); |
d83ce4e3 | 1221 | this->glink_entries_.insert(std::make_pair(ent, indx)); |
cf43a2fe AM |
1222 | } |
1223 | ||
1224 | template<int size, bool big_endian> | |
1225 | unsigned int | |
d83ce4e3 AM |
1226 | Output_data_glink<size, big_endian>::find_entry( |
1227 | const Symbol* gsym, | |
1228 | const elfcpp::Rela<size, big_endian>& reloc, | |
d1a8cabd | 1229 | const Sized_relobj<size, big_endian>* object) const |
cf43a2fe | 1230 | { |
d1a8cabd | 1231 | Glink_sym_ent ent(gsym, reloc, object); |
cf43a2fe AM |
1232 | typename Glink_entries::const_iterator p = this->glink_entries_.find(ent); |
1233 | gold_assert(p != this->glink_entries_.end()); | |
1234 | return p->second; | |
1235 | } | |
1236 | ||
1237 | template<int size, bool big_endian> | |
1238 | void | |
1239 | Output_data_glink<size, big_endian>::set_final_data_size() | |
1240 | { | |
1241 | unsigned int count = this->glink_entries_.size(); | |
1242 | off_t total = count; | |
1243 | ||
1244 | if (count != 0) | |
1245 | { | |
1246 | if (size == 32) | |
1247 | { | |
1248 | total *= 16; | |
1249 | this->pltresolve_ = total; | |
1250 | ||
1251 | // space for branch table | |
1252 | total += 4 * (count - 1); | |
1253 | ||
1254 | total += -total & 15; | |
1255 | total += this->pltresolve_size; | |
1256 | } | |
1257 | else | |
1258 | { | |
1259 | total *= 32; | |
1260 | this->pltresolve_ = total; | |
1261 | total += this->pltresolve_size; | |
1262 | ||
1263 | // space for branch table | |
1264 | total += 8 * count; | |
1265 | if (count > 0x8000) | |
1266 | total += 4 * (count - 0x8000); | |
1267 | } | |
1268 | } | |
1269 | ||
1270 | this->set_data_size(total); | |
1271 | } | |
1272 | ||
1273 | static inline uint32_t | |
1274 | l(uint32_t a) | |
1275 | { | |
1276 | return a & 0xffff; | |
1277 | } | |
1278 | ||
1279 | static inline uint32_t | |
1280 | hi(uint32_t a) | |
1281 | { | |
1282 | return l(a >> 16); | |
1283 | } | |
1284 | ||
1285 | static inline uint32_t | |
1286 | ha(uint32_t a) | |
1287 | { | |
1288 | return hi(a + 0x8000); | |
1289 | } | |
1290 | ||
1291 | template<bool big_endian> | |
1292 | static inline void | |
1293 | write_insn(unsigned char *p, uint32_t v) | |
1294 | { | |
1295 | elfcpp::Swap<32, big_endian>::writeval(p, v); | |
1296 | } | |
1297 | ||
1298 | // Write out .glink. | |
1299 | ||
1300 | template<int size, bool big_endian> | |
1301 | void | |
1302 | Output_data_glink<size, big_endian>::do_write(Output_file* of) | |
1303 | { | |
1304 | const off_t off = this->offset(); | |
42cacb20 DE |
1305 | const section_size_type oview_size = |
1306 | convert_to_section_size_type(this->data_size()); | |
cf43a2fe AM |
1307 | unsigned char* const oview = of->get_output_view(off, oview_size); |
1308 | unsigned char *p; | |
42cacb20 | 1309 | |
cf43a2fe AM |
1310 | // The base address of the .plt section. |
1311 | uint32_t plt_base = this->targ_->plt_section()->address(); | |
1312 | ||
1313 | // The address of _GLOBAL_OFFSET_TABLE_. | |
1314 | const Output_data_got_powerpc<size, big_endian> *got; | |
1315 | typename elfcpp::Elf_types<size>::Elf_Addr g_o_t; | |
1316 | got = this->targ_->got_section(); | |
1317 | g_o_t = got->address() + got->g_o_t(); | |
1318 | ||
1319 | if (size == 64) | |
1320 | { | |
1321 | // Write out call stubs. | |
1322 | typename Glink_entries::const_iterator g; | |
1323 | for (g = this->glink_entries_.begin(); | |
1324 | g != this->glink_entries_.end(); | |
1325 | ++g) | |
1326 | { | |
1327 | uint64_t plt_addr = plt_base + g->first.sym_->plt_offset(); | |
1328 | uint64_t got_addr = g_o_t; | |
1329 | uint64_t pltoff = plt_addr - got_addr; | |
1330 | ||
1331 | if (pltoff + 0x80008000 > 0xffffffff || (pltoff & 7) != 0) | |
1332 | gold_error(_("%s: linkage table error against `%s'"), | |
1333 | g->first.object_->name().c_str(), | |
1334 | g->first.sym_->demangled_name().c_str()); | |
1335 | ||
1336 | p = oview + g->second * this->glink_entry_size(); | |
1337 | if (ha(pltoff) != 0) | |
1338 | { | |
1339 | write_insn<big_endian>(p, addis_12_2 + ha(pltoff)), p += 4; | |
1340 | write_insn<big_endian>(p, std_2_1 + 40), p += 4; | |
1341 | write_insn<big_endian>(p, ld_11_12 + l(pltoff)), p += 4; | |
1342 | if (ha(pltoff + 16) != ha(pltoff)) | |
1343 | { | |
1344 | write_insn<big_endian>(p, addi_12_12 + l(pltoff)), p += 4; | |
1345 | pltoff = 0; | |
1346 | } | |
1347 | write_insn<big_endian>(p, mtctr_11), p += 4; | |
1348 | write_insn<big_endian>(p, ld_2_12 + l(pltoff + 8)), p += 4; | |
1349 | write_insn<big_endian>(p, ld_11_12 + l(pltoff + 16)), p += 4; | |
1350 | write_insn<big_endian>(p, bctr), p += 4; | |
1351 | } | |
1352 | else | |
1353 | { | |
1354 | write_insn<big_endian>(p, std_2_1 + 40), p += 4; | |
1355 | write_insn<big_endian>(p, ld_11_2 + l(pltoff)), p += 4; | |
1356 | if (ha(pltoff + 16) != ha(pltoff)) | |
1357 | { | |
1358 | write_insn<big_endian>(p, addi_2_2 + l(pltoff)), p += 4; | |
1359 | pltoff = 0; | |
1360 | } | |
1361 | write_insn<big_endian>(p, mtctr_11), p += 4; | |
1362 | write_insn<big_endian>(p, ld_11_2 + l(pltoff + 16)), p += 4; | |
1363 | write_insn<big_endian>(p, ld_2_2 + l(pltoff + 8)), p += 4; | |
1364 | write_insn<big_endian>(p, bctr), p += 4; | |
1365 | } | |
1366 | } | |
1367 | ||
1368 | // Write pltresolve stub. | |
1369 | p = oview + this->pltresolve_; | |
1370 | uint64_t after_bcl = this->address() + this->pltresolve_ + 16; | |
1371 | uint64_t pltoff = plt_base - after_bcl; | |
1372 | ||
1373 | elfcpp::Swap<64, big_endian>::writeval(p, pltoff), p += 8; | |
1374 | ||
1375 | write_insn<big_endian>(p, mflr_12), p += 4; | |
1376 | write_insn<big_endian>(p, bcl_20_31), p += 4; | |
1377 | write_insn<big_endian>(p, mflr_11), p += 4; | |
1378 | write_insn<big_endian>(p, ld_2_11 + l(-16)), p += 4; | |
1379 | write_insn<big_endian>(p, mtlr_12), p += 4; | |
1380 | write_insn<big_endian>(p, add_12_2_11), p += 4; | |
1381 | write_insn<big_endian>(p, ld_11_12 + 0), p += 4; | |
1382 | write_insn<big_endian>(p, ld_2_12 + 8), p += 4; | |
1383 | write_insn<big_endian>(p, mtctr_11), p += 4; | |
1384 | write_insn<big_endian>(p, ld_11_12 + 16), p += 4; | |
1385 | write_insn<big_endian>(p, bctr), p += 4; | |
1386 | while (p < oview + this->pltresolve_ + this->pltresolve_size) | |
1387 | write_insn<big_endian>(p, nop), p += 4; | |
1388 | ||
1389 | // Write lazy link call stubs. | |
1390 | uint32_t indx = 0; | |
1391 | while (p < oview + oview_size) | |
1392 | { | |
1393 | if (indx < 0x8000) | |
1394 | { | |
1395 | write_insn<big_endian>(p, li_0_0 + indx), p += 4; | |
1396 | } | |
1397 | else | |
1398 | { | |
1399 | write_insn<big_endian>(p, lis_0_0 + hi(indx)), p += 4; | |
1400 | write_insn<big_endian>(p, ori_0_0_0 + l(indx)), p += 4; | |
1401 | } | |
1402 | uint16_t branch_off = this->pltresolve_ + 8 - (p - oview); | |
1403 | write_insn<big_endian>(p, b + (branch_off & 0x3fffffc)), p += 4; | |
1404 | indx++; | |
1405 | } | |
1406 | } | |
1407 | else | |
1408 | { | |
1409 | // Write out call stubs. | |
1410 | typename Glink_entries::const_iterator g; | |
1411 | for (g = this->glink_entries_.begin(); | |
1412 | g != this->glink_entries_.end(); | |
1413 | ++g) | |
1414 | { | |
1415 | uint32_t plt_addr = plt_base + g->first.sym_->plt_offset(); | |
1416 | uint32_t got_addr; | |
1417 | ||
1418 | p = oview + g->second * this->glink_entry_size(); | |
1419 | if (parameters->options().output_is_position_independent()) | |
1420 | { | |
d1a8cabd AM |
1421 | const Powerpc_relobj<size, big_endian>* object = static_cast |
1422 | <const Powerpc_relobj<size, big_endian>*>(g->first.object_); | |
1423 | if (object != NULL) | |
1424 | { | |
1425 | unsigned int got2 = object->got2_shndx(); | |
1426 | got_addr = (g->first.object_->output_section(got2)->address() | |
1427 | + g->first.object_->output_section_offset(got2) | |
1428 | + g->first.addend_); | |
1429 | } | |
cf43a2fe AM |
1430 | else |
1431 | got_addr = g_o_t; | |
1432 | ||
1433 | uint32_t pltoff = plt_addr - got_addr; | |
1434 | if (ha(pltoff) == 0) | |
1435 | { | |
1436 | write_insn<big_endian>(p + 0, lwz_11_30 + l(pltoff)); | |
1437 | write_insn<big_endian>(p + 4, mtctr_11); | |
1438 | write_insn<big_endian>(p + 8, bctr); | |
1439 | } | |
1440 | else | |
1441 | { | |
1442 | write_insn<big_endian>(p + 0, addis_11_30 + ha(pltoff)); | |
1443 | write_insn<big_endian>(p + 4, lwz_11_11 + l(pltoff)); | |
1444 | write_insn<big_endian>(p + 8, mtctr_11); | |
1445 | write_insn<big_endian>(p + 12, bctr); | |
1446 | } | |
1447 | } | |
1448 | else | |
1449 | { | |
1450 | write_insn<big_endian>(p + 0, lis_11 + ha(plt_addr)); | |
1451 | write_insn<big_endian>(p + 4, lwz_11_11 + l(plt_addr)); | |
1452 | write_insn<big_endian>(p + 8, mtctr_11); | |
1453 | write_insn<big_endian>(p + 12, bctr); | |
1454 | } | |
1455 | } | |
42cacb20 | 1456 | |
cf43a2fe AM |
1457 | // Write out pltresolve branch table. |
1458 | p = oview + this->pltresolve_; | |
1459 | unsigned int the_end = oview_size - this->pltresolve_size; | |
1460 | unsigned char *end_p = oview + the_end; | |
1461 | while (p < end_p - 8 * 4) | |
1462 | write_insn<big_endian>(p, b + end_p - p), p += 4; | |
1463 | while (p < end_p) | |
1464 | write_insn<big_endian>(p, nop), p += 4; | |
42cacb20 | 1465 | |
cf43a2fe AM |
1466 | // Write out pltresolve call stub. |
1467 | if (parameters->options().output_is_position_independent()) | |
42cacb20 | 1468 | { |
cf43a2fe AM |
1469 | uint32_t res0_off = this->pltresolve_; |
1470 | uint32_t after_bcl_off = the_end + 12; | |
1471 | uint32_t bcl_res0 = after_bcl_off - res0_off; | |
1472 | ||
1473 | write_insn<big_endian>(p + 0, addis_11_11 + ha(bcl_res0)); | |
1474 | write_insn<big_endian>(p + 4, mflr_0); | |
1475 | write_insn<big_endian>(p + 8, bcl_20_31); | |
1476 | write_insn<big_endian>(p + 12, addi_11_11 + l(bcl_res0)); | |
1477 | write_insn<big_endian>(p + 16, mflr_12); | |
1478 | write_insn<big_endian>(p + 20, mtlr_0); | |
1479 | write_insn<big_endian>(p + 24, sub_11_11_12); | |
1480 | ||
1481 | uint32_t got_bcl = g_o_t + 4 - (after_bcl_off + this->address()); | |
1482 | ||
1483 | write_insn<big_endian>(p + 28, addis_12_12 + ha(got_bcl)); | |
1484 | if (ha(got_bcl) == ha(got_bcl + 4)) | |
1485 | { | |
1486 | write_insn<big_endian>(p + 32, lwz_0_12 + l(got_bcl)); | |
1487 | write_insn<big_endian>(p + 36, lwz_12_12 + l(got_bcl + 4)); | |
1488 | } | |
1489 | else | |
1490 | { | |
1491 | write_insn<big_endian>(p + 32, lwzu_0_12 + l(got_bcl)); | |
1492 | write_insn<big_endian>(p + 36, lwz_12_12 + 4); | |
1493 | } | |
1494 | write_insn<big_endian>(p + 40, mtctr_0); | |
1495 | write_insn<big_endian>(p + 44, add_0_11_11); | |
1496 | write_insn<big_endian>(p + 48, add_11_0_11); | |
1497 | write_insn<big_endian>(p + 52, bctr); | |
1498 | write_insn<big_endian>(p + 56, nop); | |
1499 | write_insn<big_endian>(p + 60, nop); | |
42cacb20 | 1500 | } |
cf43a2fe | 1501 | else |
42cacb20 | 1502 | { |
cf43a2fe AM |
1503 | uint32_t res0 = this->pltresolve_ + this->address(); |
1504 | ||
1505 | write_insn<big_endian>(p + 0, lis_12 + ha(g_o_t + 4)); | |
1506 | write_insn<big_endian>(p + 4, addis_11_11 + ha(-res0)); | |
1507 | if (ha(g_o_t + 4) == ha(g_o_t + 8)) | |
1508 | write_insn<big_endian>(p + 8, lwz_0_12 + l(g_o_t + 4)); | |
1509 | else | |
1510 | write_insn<big_endian>(p + 8, lwzu_0_12 + l(g_o_t + 4)); | |
1511 | write_insn<big_endian>(p + 12, addi_11_11 + l(-res0)); | |
1512 | write_insn<big_endian>(p + 16, mtctr_0); | |
1513 | write_insn<big_endian>(p + 20, add_0_11_11); | |
1514 | if (ha(g_o_t + 4) == ha(g_o_t + 8)) | |
1515 | write_insn<big_endian>(p + 24, lwz_12_12 + l(g_o_t + 8)); | |
1516 | else | |
1517 | write_insn<big_endian>(p + 24, lwz_12_12 + 4); | |
1518 | write_insn<big_endian>(p + 28, add_11_0_11); | |
1519 | write_insn<big_endian>(p + 32, bctr); | |
1520 | write_insn<big_endian>(p + 36, nop); | |
1521 | write_insn<big_endian>(p + 40, nop); | |
1522 | write_insn<big_endian>(p + 44, nop); | |
1523 | write_insn<big_endian>(p + 48, nop); | |
1524 | write_insn<big_endian>(p + 52, nop); | |
1525 | write_insn<big_endian>(p + 56, nop); | |
1526 | write_insn<big_endian>(p + 60, nop); | |
42cacb20 | 1527 | } |
cf43a2fe | 1528 | p += 64; |
42cacb20 DE |
1529 | } |
1530 | ||
cf43a2fe AM |
1531 | of->write_output_view(off, oview_size, oview); |
1532 | } | |
1533 | ||
1534 | // Create the glink section. | |
42cacb20 | 1535 | |
cf43a2fe AM |
1536 | template<int size, bool big_endian> |
1537 | void | |
1538 | Target_powerpc<size, big_endian>::make_glink_section(Layout* layout) | |
1539 | { | |
1540 | if (this->glink_ == NULL) | |
1541 | { | |
1542 | this->glink_ = new Output_data_glink<size, big_endian>(this); | |
1543 | layout->add_output_section_data(".text", elfcpp::SHT_PROGBITS, | |
1544 | elfcpp::SHF_ALLOC | elfcpp::SHF_EXECINSTR, | |
1545 | this->glink_, ORDER_TEXT, false); | |
1546 | } | |
42cacb20 DE |
1547 | } |
1548 | ||
1549 | // Create a PLT entry for a global symbol. | |
1550 | ||
1551 | template<int size, bool big_endian> | |
1552 | void | |
d83ce4e3 AM |
1553 | Target_powerpc<size, big_endian>::make_plt_entry( |
1554 | Layout* layout, | |
1555 | Symbol* gsym, | |
1556 | const elfcpp::Rela<size, big_endian>& reloc, | |
1557 | const Sized_relobj<size, big_endian>* object) | |
42cacb20 | 1558 | { |
42cacb20 | 1559 | if (this->plt_ == NULL) |
cf43a2fe | 1560 | this->make_plt_section(layout); |
42cacb20 | 1561 | |
cf43a2fe | 1562 | this->plt_->add_entry(gsym); |
612a8d3d | 1563 | |
d1a8cabd | 1564 | this->glink_->add_entry(gsym, reloc, object); |
42cacb20 DE |
1565 | } |
1566 | ||
0e70b911 CC |
1567 | // Return the number of entries in the PLT. |
1568 | ||
1569 | template<int size, bool big_endian> | |
1570 | unsigned int | |
1571 | Target_powerpc<size, big_endian>::plt_entry_count() const | |
1572 | { | |
1573 | if (this->plt_ == NULL) | |
1574 | return 0; | |
1575 | return this->plt_->entry_count(); | |
1576 | } | |
1577 | ||
1578 | // Return the offset of the first non-reserved PLT entry. | |
1579 | ||
1580 | template<int size, bool big_endian> | |
1581 | unsigned int | |
1582 | Target_powerpc<size, big_endian>::first_plt_entry_offset() const | |
1583 | { | |
1584 | return Output_data_plt_powerpc<size, big_endian>::first_plt_entry_offset(); | |
1585 | } | |
1586 | ||
1587 | // Return the size of each PLT entry. | |
1588 | ||
1589 | template<int size, bool big_endian> | |
1590 | unsigned int | |
1591 | Target_powerpc<size, big_endian>::plt_entry_size() const | |
1592 | { | |
1593 | return Output_data_plt_powerpc<size, big_endian>::get_plt_entry_size(); | |
1594 | } | |
1595 | ||
42cacb20 DE |
1596 | // Create a GOT entry for the TLS module index. |
1597 | ||
1598 | template<int size, bool big_endian> | |
1599 | unsigned int | |
6fa2a40b CC |
1600 | Target_powerpc<size, big_endian>::got_mod_index_entry( |
1601 | Symbol_table* symtab, | |
1602 | Layout* layout, | |
1603 | Sized_relobj_file<size, big_endian>* object) | |
42cacb20 DE |
1604 | { |
1605 | if (this->got_mod_index_offset_ == -1U) | |
1606 | { | |
1607 | gold_assert(symtab != NULL && layout != NULL && object != NULL); | |
1608 | Reloc_section* rela_dyn = this->rela_dyn_section(layout); | |
cf43a2fe | 1609 | Output_data_got_powerpc<size, big_endian>* got; |
42cacb20 DE |
1610 | unsigned int got_offset; |
1611 | ||
1612 | got = this->got_section(symtab, layout); | |
cf43a2fe | 1613 | got->reserve_ent(2); |
42cacb20 DE |
1614 | got_offset = got->add_constant(0); |
1615 | rela_dyn->add_local(object, 0, elfcpp::R_POWERPC_DTPMOD, got, | |
1616 | got_offset, 0); | |
1617 | got->add_constant(0); | |
1618 | this->got_mod_index_offset_ = got_offset; | |
1619 | } | |
1620 | return this->got_mod_index_offset_; | |
1621 | } | |
1622 | ||
1623 | // Optimize the TLS relocation type based on what we know about the | |
1624 | // symbol. IS_FINAL is true if the final address of this symbol is | |
1625 | // known at link time. | |
1626 | ||
cf43a2fe AM |
1627 | template<int size, bool big_endian> |
1628 | tls::Tls_optimization | |
1629 | Target_powerpc<size, big_endian>::optimize_tls_reloc(bool, int) | |
42cacb20 DE |
1630 | { |
1631 | // If we are generating a shared library, then we can't do anything | |
1632 | // in the linker. | |
1633 | if (parameters->options().shared()) | |
1634 | return tls::TLSOPT_NONE; | |
cf43a2fe AM |
1635 | // FIXME |
1636 | return tls::TLSOPT_NONE; | |
42cacb20 DE |
1637 | } |
1638 | ||
95a2c8d6 RS |
1639 | // Get the Reference_flags for a particular relocation. |
1640 | ||
1641 | template<int size, bool big_endian> | |
1642 | int | |
d83ce4e3 | 1643 | Target_powerpc<size, big_endian>::Scan::get_reference_flags(unsigned int r_type) |
95a2c8d6 RS |
1644 | { |
1645 | switch (r_type) | |
1646 | { | |
1647 | case elfcpp::R_POWERPC_NONE: | |
1648 | case elfcpp::R_POWERPC_GNU_VTINHERIT: | |
1649 | case elfcpp::R_POWERPC_GNU_VTENTRY: | |
1650 | case elfcpp::R_PPC64_TOC: | |
1651 | // No symbol reference. | |
1652 | return 0; | |
1653 | ||
1654 | case elfcpp::R_POWERPC_ADDR16: | |
1655 | case elfcpp::R_POWERPC_ADDR16_LO: | |
1656 | case elfcpp::R_POWERPC_ADDR16_HI: | |
1657 | case elfcpp::R_POWERPC_ADDR16_HA: | |
1658 | case elfcpp::R_POWERPC_ADDR32: | |
1659 | case elfcpp::R_PPC64_ADDR64: | |
1660 | return Symbol::ABSOLUTE_REF; | |
1661 | ||
1662 | case elfcpp::R_POWERPC_REL24: | |
1663 | case elfcpp::R_PPC_LOCAL24PC: | |
1664 | case elfcpp::R_PPC_REL16: | |
1665 | case elfcpp::R_PPC_REL16_LO: | |
1666 | case elfcpp::R_PPC_REL16_HI: | |
1667 | case elfcpp::R_PPC_REL16_HA: | |
1668 | return Symbol::RELATIVE_REF; | |
1669 | ||
1670 | case elfcpp::R_PPC_PLTREL24: | |
1671 | return Symbol::FUNCTION_CALL | Symbol::RELATIVE_REF; | |
1672 | ||
1673 | case elfcpp::R_POWERPC_GOT16: | |
1674 | case elfcpp::R_POWERPC_GOT16_LO: | |
1675 | case elfcpp::R_POWERPC_GOT16_HI: | |
1676 | case elfcpp::R_POWERPC_GOT16_HA: | |
1677 | case elfcpp::R_PPC64_TOC16: | |
1678 | case elfcpp::R_PPC64_TOC16_LO: | |
1679 | case elfcpp::R_PPC64_TOC16_HI: | |
1680 | case elfcpp::R_PPC64_TOC16_HA: | |
1681 | case elfcpp::R_PPC64_TOC16_DS: | |
1682 | case elfcpp::R_PPC64_TOC16_LO_DS: | |
1683 | // Absolute in GOT. | |
1684 | return Symbol::ABSOLUTE_REF; | |
1685 | ||
1686 | case elfcpp::R_POWERPC_GOT_TPREL16: | |
1687 | case elfcpp::R_POWERPC_TLS: | |
1688 | return Symbol::TLS_REF; | |
1689 | ||
1690 | case elfcpp::R_POWERPC_COPY: | |
1691 | case elfcpp::R_POWERPC_GLOB_DAT: | |
1692 | case elfcpp::R_POWERPC_JMP_SLOT: | |
1693 | case elfcpp::R_POWERPC_RELATIVE: | |
1694 | case elfcpp::R_POWERPC_DTPMOD: | |
1695 | default: | |
1696 | // Not expected. We will give an error later. | |
1697 | return 0; | |
1698 | } | |
1699 | } | |
1700 | ||
42cacb20 DE |
1701 | // Report an unsupported relocation against a local symbol. |
1702 | ||
1703 | template<int size, bool big_endian> | |
1704 | void | |
1705 | Target_powerpc<size, big_endian>::Scan::unsupported_reloc_local( | |
d83ce4e3 AM |
1706 | Sized_relobj_file<size, big_endian>* object, |
1707 | unsigned int r_type) | |
42cacb20 DE |
1708 | { |
1709 | gold_error(_("%s: unsupported reloc %u against local symbol"), | |
1710 | object->name().c_str(), r_type); | |
1711 | } | |
1712 | ||
1713 | // We are about to emit a dynamic relocation of type R_TYPE. If the | |
1714 | // dynamic linker does not support it, issue an error. | |
1715 | ||
1716 | template<int size, bool big_endian> | |
1717 | void | |
1718 | Target_powerpc<size, big_endian>::Scan::check_non_pic(Relobj* object, | |
1719 | unsigned int r_type) | |
1720 | { | |
1721 | gold_assert(r_type != elfcpp::R_POWERPC_NONE); | |
1722 | ||
1723 | // These are the relocation types supported by glibc for both 32-bit | |
1724 | // and 64-bit powerpc. | |
1725 | switch (r_type) | |
1726 | { | |
1727 | case elfcpp::R_POWERPC_RELATIVE: | |
1728 | case elfcpp::R_POWERPC_GLOB_DAT: | |
1729 | case elfcpp::R_POWERPC_DTPMOD: | |
1730 | case elfcpp::R_POWERPC_DTPREL: | |
1731 | case elfcpp::R_POWERPC_TPREL: | |
1732 | case elfcpp::R_POWERPC_JMP_SLOT: | |
1733 | case elfcpp::R_POWERPC_COPY: | |
1734 | case elfcpp::R_POWERPC_ADDR32: | |
1735 | case elfcpp::R_POWERPC_ADDR24: | |
1736 | case elfcpp::R_POWERPC_REL24: | |
1737 | return; | |
1738 | ||
1739 | default: | |
1740 | break; | |
1741 | } | |
1742 | ||
1743 | if (size == 64) | |
1744 | { | |
1745 | switch (r_type) | |
1746 | { | |
1747 | // These are the relocation types supported only on 64-bit. | |
1748 | case elfcpp::R_PPC64_ADDR64: | |
1749 | case elfcpp::R_PPC64_TPREL16_LO_DS: | |
1750 | case elfcpp::R_PPC64_TPREL16_DS: | |
1751 | case elfcpp::R_POWERPC_TPREL16: | |
1752 | case elfcpp::R_POWERPC_TPREL16_LO: | |
1753 | case elfcpp::R_POWERPC_TPREL16_HI: | |
1754 | case elfcpp::R_POWERPC_TPREL16_HA: | |
1755 | case elfcpp::R_PPC64_TPREL16_HIGHER: | |
1756 | case elfcpp::R_PPC64_TPREL16_HIGHEST: | |
1757 | case elfcpp::R_PPC64_TPREL16_HIGHERA: | |
1758 | case elfcpp::R_PPC64_TPREL16_HIGHESTA: | |
1759 | case elfcpp::R_PPC64_ADDR16_LO_DS: | |
1760 | case elfcpp::R_POWERPC_ADDR16_LO: | |
1761 | case elfcpp::R_POWERPC_ADDR16_HI: | |
1762 | case elfcpp::R_POWERPC_ADDR16_HA: | |
1763 | case elfcpp::R_POWERPC_ADDR30: | |
1764 | case elfcpp::R_PPC64_UADDR64: | |
1765 | case elfcpp::R_POWERPC_UADDR32: | |
1766 | case elfcpp::R_POWERPC_ADDR16: | |
1767 | case elfcpp::R_POWERPC_UADDR16: | |
1768 | case elfcpp::R_PPC64_ADDR16_DS: | |
1769 | case elfcpp::R_PPC64_ADDR16_HIGHER: | |
1770 | case elfcpp::R_PPC64_ADDR16_HIGHEST: | |
1771 | case elfcpp::R_PPC64_ADDR16_HIGHERA: | |
1772 | case elfcpp::R_PPC64_ADDR16_HIGHESTA: | |
1773 | case elfcpp::R_POWERPC_ADDR14_BRTAKEN: | |
1774 | case elfcpp::R_POWERPC_ADDR14_BRNTAKEN: | |
1775 | case elfcpp::R_POWERPC_REL32: | |
1776 | case elfcpp::R_PPC64_REL64: | |
1777 | return; | |
1778 | ||
1779 | default: | |
1780 | break; | |
1781 | } | |
1782 | } | |
1783 | else | |
1784 | { | |
1785 | switch (r_type) | |
1786 | { | |
1787 | // These are the relocation types supported only on 32-bit. | |
1788 | ||
1789 | default: | |
1790 | break; | |
1791 | } | |
1792 | } | |
1793 | ||
1794 | // This prevents us from issuing more than one error per reloc | |
1795 | // section. But we can still wind up issuing more than one | |
1796 | // error per object file. | |
1797 | if (this->issued_non_pic_error_) | |
1798 | return; | |
33aea2fd | 1799 | gold_assert(parameters->options().output_is_position_independent()); |
42cacb20 DE |
1800 | object->error(_("requires unsupported dynamic reloc; " |
1801 | "recompile with -fPIC")); | |
1802 | this->issued_non_pic_error_ = true; | |
1803 | return; | |
1804 | } | |
1805 | ||
1806 | // Scan a relocation for a local symbol. | |
1807 | ||
1808 | template<int size, bool big_endian> | |
1809 | inline void | |
1810 | Target_powerpc<size, big_endian>::Scan::local( | |
d83ce4e3 AM |
1811 | Symbol_table* symtab, |
1812 | Layout* layout, | |
1813 | Target_powerpc<size, big_endian>* target, | |
1814 | Sized_relobj_file<size, big_endian>* object, | |
1815 | unsigned int data_shndx, | |
1816 | Output_section* output_section, | |
1817 | const elfcpp::Rela<size, big_endian>& reloc, | |
1818 | unsigned int r_type, | |
1819 | const elfcpp::Sym<size, big_endian>& lsym) | |
42cacb20 DE |
1820 | { |
1821 | switch (r_type) | |
1822 | { | |
1823 | case elfcpp::R_POWERPC_NONE: | |
1824 | case elfcpp::R_POWERPC_GNU_VTINHERIT: | |
1825 | case elfcpp::R_POWERPC_GNU_VTENTRY: | |
1826 | break; | |
1827 | ||
1828 | case elfcpp::R_PPC64_ADDR64: | |
1829 | case elfcpp::R_POWERPC_ADDR32: | |
1830 | case elfcpp::R_POWERPC_ADDR16_HA: | |
1831 | case elfcpp::R_POWERPC_ADDR16_LO: | |
1832 | // If building a shared library (or a position-independent | |
1833 | // executable), we need to create a dynamic relocation for | |
1834 | // this location. | |
1835 | if (parameters->options().output_is_position_independent()) | |
2e702c99 RM |
1836 | { |
1837 | Reloc_section* rela_dyn = target->rela_dyn_section(layout); | |
42cacb20 DE |
1838 | |
1839 | check_non_pic(object, r_type); | |
2e702c99 RM |
1840 | if (lsym.get_st_type() != elfcpp::STT_SECTION) |
1841 | { | |
1842 | unsigned int r_sym = elfcpp::elf_r_sym<size>(reloc.get_r_info()); | |
1843 | rela_dyn->add_local(object, r_sym, r_type, output_section, | |
42cacb20 DE |
1844 | data_shndx, reloc.get_r_offset(), |
1845 | reloc.get_r_addend()); | |
2e702c99 RM |
1846 | } |
1847 | else | |
1848 | { | |
42cacb20 | 1849 | unsigned int r_sym = elfcpp::elf_r_sym<size>(reloc.get_r_info()); |
2e702c99 RM |
1850 | gold_assert(lsym.get_st_value() == 0); |
1851 | rela_dyn->add_local_relative(object, r_sym, r_type, | |
42cacb20 DE |
1852 | output_section, data_shndx, |
1853 | reloc.get_r_offset(), | |
397b129b | 1854 | reloc.get_r_addend(), false); |
2e702c99 RM |
1855 | } |
1856 | } | |
42cacb20 DE |
1857 | break; |
1858 | ||
1859 | case elfcpp::R_POWERPC_REL24: | |
1860 | case elfcpp::R_PPC_LOCAL24PC: | |
1861 | case elfcpp::R_POWERPC_REL32: | |
1862 | case elfcpp::R_PPC_REL16_LO: | |
1863 | case elfcpp::R_PPC_REL16_HA: | |
1864 | break; | |
1865 | ||
1866 | case elfcpp::R_POWERPC_GOT16: | |
1867 | case elfcpp::R_POWERPC_GOT16_LO: | |
1868 | case elfcpp::R_POWERPC_GOT16_HI: | |
1869 | case elfcpp::R_POWERPC_GOT16_HA: | |
42cacb20 | 1870 | { |
cf43a2fe AM |
1871 | // The symbol requires a GOT entry. |
1872 | Output_data_got_powerpc<size, big_endian>* got; | |
42cacb20 DE |
1873 | unsigned int r_sym; |
1874 | ||
1875 | got = target->got_section(symtab, layout); | |
1876 | r_sym = elfcpp::elf_r_sym<size>(reloc.get_r_info()); | |
1877 | ||
1878 | // If we are generating a shared object, we need to add a | |
1879 | // dynamic relocation for this symbol's GOT entry. | |
1880 | if (parameters->options().output_is_position_independent()) | |
1881 | { | |
1882 | if (!object->local_has_got_offset(r_sym, GOT_TYPE_STANDARD)) | |
1883 | { | |
1884 | Reloc_section* rela_dyn = target->rela_dyn_section(layout); | |
1885 | unsigned int off; | |
1886 | ||
1887 | off = got->add_constant(0); | |
1888 | object->set_local_got_offset(r_sym, GOT_TYPE_STANDARD, off); | |
1889 | rela_dyn->add_local_relative(object, r_sym, | |
1890 | elfcpp::R_POWERPC_RELATIVE, | |
397b129b | 1891 | got, off, 0, false); |
42cacb20 | 1892 | } |
2e702c99 | 1893 | } |
42cacb20 DE |
1894 | else |
1895 | got->add_local(object, r_sym, GOT_TYPE_STANDARD); | |
1896 | } | |
1897 | break; | |
1898 | ||
cf43a2fe AM |
1899 | case elfcpp::R_PPC64_TOC16: |
1900 | case elfcpp::R_PPC64_TOC16_LO: | |
1901 | case elfcpp::R_PPC64_TOC16_HI: | |
1902 | case elfcpp::R_PPC64_TOC16_HA: | |
1903 | case elfcpp::R_PPC64_TOC16_DS: | |
1904 | case elfcpp::R_PPC64_TOC16_LO_DS: | |
42cacb20 DE |
1905 | case elfcpp::R_PPC64_TOC: |
1906 | // We need a GOT section. | |
1907 | target->got_section(symtab, layout); | |
1908 | break; | |
1909 | ||
1910 | // These are relocations which should only be seen by the | |
1911 | // dynamic linker, and should never be seen here. | |
1912 | case elfcpp::R_POWERPC_COPY: | |
1913 | case elfcpp::R_POWERPC_GLOB_DAT: | |
1914 | case elfcpp::R_POWERPC_JMP_SLOT: | |
1915 | case elfcpp::R_POWERPC_RELATIVE: | |
1916 | case elfcpp::R_POWERPC_DTPMOD: | |
1917 | gold_error(_("%s: unexpected reloc %u in object file"), | |
1918 | object->name().c_str(), r_type); | |
1919 | break; | |
1920 | ||
1921 | default: | |
1922 | unsupported_reloc_local(object, r_type); | |
1923 | break; | |
1924 | } | |
1925 | } | |
1926 | ||
1927 | // Report an unsupported relocation against a global symbol. | |
1928 | ||
1929 | template<int size, bool big_endian> | |
1930 | void | |
1931 | Target_powerpc<size, big_endian>::Scan::unsupported_reloc_global( | |
d83ce4e3 AM |
1932 | Sized_relobj_file<size, big_endian>* object, |
1933 | unsigned int r_type, | |
1934 | Symbol* gsym) | |
42cacb20 DE |
1935 | { |
1936 | gold_error(_("%s: unsupported reloc %u against global symbol %s"), | |
1937 | object->name().c_str(), r_type, gsym->demangled_name().c_str()); | |
1938 | } | |
1939 | ||
1940 | // Scan a relocation for a global symbol. | |
1941 | ||
1942 | template<int size, bool big_endian> | |
1943 | inline void | |
1944 | Target_powerpc<size, big_endian>::Scan::global( | |
d83ce4e3 AM |
1945 | Symbol_table* symtab, |
1946 | Layout* layout, | |
1947 | Target_powerpc<size, big_endian>* target, | |
1948 | Sized_relobj_file<size, big_endian>* object, | |
1949 | unsigned int data_shndx, | |
1950 | Output_section* output_section, | |
1951 | const elfcpp::Rela<size, big_endian>& reloc, | |
1952 | unsigned int r_type, | |
1953 | Symbol* gsym) | |
42cacb20 DE |
1954 | { |
1955 | switch (r_type) | |
1956 | { | |
1957 | case elfcpp::R_POWERPC_NONE: | |
1958 | case elfcpp::R_POWERPC_GNU_VTINHERIT: | |
1959 | case elfcpp::R_POWERPC_GNU_VTENTRY: | |
cf43a2fe | 1960 | case elfcpp::R_PPC_LOCAL24PC: |
42cacb20 DE |
1961 | break; |
1962 | ||
1963 | case elfcpp::R_POWERPC_ADDR16: | |
1964 | case elfcpp::R_POWERPC_ADDR16_LO: | |
1965 | case elfcpp::R_POWERPC_ADDR16_HI: | |
1966 | case elfcpp::R_POWERPC_ADDR16_HA: | |
1967 | case elfcpp::R_POWERPC_ADDR32: | |
1968 | case elfcpp::R_PPC64_ADDR64: | |
1969 | { | |
cf43a2fe AM |
1970 | // Make a PLT entry if necessary. |
1971 | if (gsym->needs_plt_entry()) | |
1972 | { | |
1973 | target->make_plt_entry(layout, gsym, reloc, 0); | |
2e702c99 RM |
1974 | // Since this is not a PC-relative relocation, we may be |
1975 | // taking the address of a function. In that case we need to | |
1976 | // set the entry in the dynamic symbol table to the address of | |
1977 | // the PLT entry. | |
cf43a2fe AM |
1978 | if (size == 32 |
1979 | && gsym->is_from_dynobj() && !parameters->options().shared()) | |
2e702c99 | 1980 | gsym->set_needs_dynsym_value(); |
cf43a2fe AM |
1981 | } |
1982 | // Make a dynamic relocation if necessary. | |
1983 | if (gsym->needs_dynamic_reloc(Scan::get_reference_flags(r_type))) | |
1984 | { | |
1985 | if (gsym->may_need_copy_reloc()) | |
1986 | { | |
1987 | target->copy_reloc(symtab, layout, object, | |
1988 | data_shndx, output_section, gsym, reloc); | |
1989 | } | |
1990 | else if ((r_type == elfcpp::R_POWERPC_ADDR32 | |
42cacb20 | 1991 | || r_type == elfcpp::R_PPC64_ADDR64) |
2e702c99 RM |
1992 | && gsym->can_use_relative_reloc(false)) |
1993 | { | |
1994 | Reloc_section* rela_dyn = target->rela_dyn_section(layout); | |
1995 | rela_dyn->add_global_relative(gsym, elfcpp::R_POWERPC_RELATIVE, | |
42cacb20 DE |
1996 | output_section, object, |
1997 | data_shndx, reloc.get_r_offset(), | |
13cf9988 | 1998 | reloc.get_r_addend(), false); |
2e702c99 RM |
1999 | } |
2000 | else | |
2001 | { | |
2002 | Reloc_section* rela_dyn = target->rela_dyn_section(layout); | |
42cacb20 DE |
2003 | |
2004 | check_non_pic(object, r_type); | |
2005 | if (gsym->is_from_dynobj() | |
2006 | || gsym->is_undefined() | |
2007 | || gsym->is_preemptible()) | |
2008 | rela_dyn->add_global(gsym, r_type, output_section, | |
2009 | object, data_shndx, | |
2010 | reloc.get_r_offset(), | |
2011 | reloc.get_r_addend()); | |
2012 | else | |
2013 | rela_dyn->add_global_relative(gsym, r_type, | |
2014 | output_section, object, | |
2015 | data_shndx, | |
2016 | reloc.get_r_offset(), | |
13cf9988 | 2017 | reloc.get_r_addend(), false); |
2e702c99 RM |
2018 | } |
2019 | } | |
42cacb20 DE |
2020 | } |
2021 | break; | |
2022 | ||
cf43a2fe | 2023 | case elfcpp::R_PPC_PLTREL24: |
42cacb20 | 2024 | case elfcpp::R_POWERPC_REL24: |
42cacb20 | 2025 | { |
cf43a2fe AM |
2026 | if (gsym->needs_plt_entry() |
2027 | || (!gsym->final_value_is_known() | |
2028 | && !(gsym->is_defined() | |
2029 | && !gsym->is_from_dynobj() | |
2030 | && !gsym->is_preemptible()))) | |
d1a8cabd | 2031 | target->make_plt_entry(layout, gsym, reloc, object); |
42cacb20 | 2032 | // Make a dynamic relocation if necessary. |
95a2c8d6 | 2033 | if (gsym->needs_dynamic_reloc(Scan::get_reference_flags(r_type))) |
42cacb20 | 2034 | { |
966d4097 | 2035 | if (gsym->may_need_copy_reloc()) |
42cacb20 DE |
2036 | { |
2037 | target->copy_reloc(symtab, layout, object, | |
2038 | data_shndx, output_section, gsym, | |
2039 | reloc); | |
2040 | } | |
2041 | else | |
2042 | { | |
2043 | Reloc_section* rela_dyn = target->rela_dyn_section(layout); | |
2044 | check_non_pic(object, r_type); | |
2045 | rela_dyn->add_global(gsym, r_type, output_section, object, | |
2046 | data_shndx, reloc.get_r_offset(), | |
2047 | reloc.get_r_addend()); | |
2048 | } | |
2049 | } | |
2050 | } | |
2051 | break; | |
2052 | ||
cf43a2fe AM |
2053 | case elfcpp::R_PPC_REL16: |
2054 | case elfcpp::R_PPC_REL16_LO: | |
2055 | case elfcpp::R_PPC_REL16_HI: | |
2056 | case elfcpp::R_PPC_REL16_HA: | |
2057 | break; | |
2058 | ||
42cacb20 DE |
2059 | case elfcpp::R_POWERPC_GOT16: |
2060 | case elfcpp::R_POWERPC_GOT16_LO: | |
2061 | case elfcpp::R_POWERPC_GOT16_HI: | |
2062 | case elfcpp::R_POWERPC_GOT16_HA: | |
42cacb20 | 2063 | { |
cf43a2fe AM |
2064 | // The symbol requires a GOT entry. |
2065 | Output_data_got_powerpc<size, big_endian>* got; | |
42cacb20 DE |
2066 | |
2067 | got = target->got_section(symtab, layout); | |
2e702c99 RM |
2068 | if (gsym->final_value_is_known()) |
2069 | got->add_global(gsym, GOT_TYPE_STANDARD); | |
2070 | else | |
2071 | { | |
2072 | // If this symbol is not fully resolved, we need to add a | |
2073 | // dynamic relocation for it. | |
2074 | Reloc_section* rela_dyn = target->rela_dyn_section(layout); | |
2075 | if (gsym->is_from_dynobj() | |
2076 | || gsym->is_undefined() | |
2077 | || gsym->is_preemptible()) | |
2078 | got->add_global_with_rel(gsym, GOT_TYPE_STANDARD, rela_dyn, | |
83896202 | 2079 | elfcpp::R_POWERPC_GLOB_DAT); |
2e702c99 RM |
2080 | else if (!gsym->has_got_offset(GOT_TYPE_STANDARD)) |
2081 | { | |
42cacb20 DE |
2082 | unsigned int off = got->add_constant(0); |
2083 | ||
2084 | gsym->set_got_offset(GOT_TYPE_STANDARD, off); | |
2085 | rela_dyn->add_global_relative(gsym, elfcpp::R_POWERPC_RELATIVE, | |
13cf9988 | 2086 | got, off, 0, false); |
42cacb20 | 2087 | } |
2e702c99 | 2088 | } |
42cacb20 DE |
2089 | } |
2090 | break; | |
2091 | ||
2092 | case elfcpp::R_PPC64_TOC: | |
cf43a2fe AM |
2093 | case elfcpp::R_PPC64_TOC16: |
2094 | case elfcpp::R_PPC64_TOC16_LO: | |
2095 | case elfcpp::R_PPC64_TOC16_HI: | |
2096 | case elfcpp::R_PPC64_TOC16_HA: | |
2097 | case elfcpp::R_PPC64_TOC16_DS: | |
2098 | case elfcpp::R_PPC64_TOC16_LO_DS: | |
42cacb20 DE |
2099 | // We need a GOT section. |
2100 | target->got_section(symtab, layout); | |
2101 | break; | |
2102 | ||
2103 | case elfcpp::R_POWERPC_GOT_TPREL16: | |
2104 | case elfcpp::R_POWERPC_TLS: | |
2105 | // XXX TLS | |
2106 | break; | |
2107 | ||
2108 | // These are relocations which should only be seen by the | |
2109 | // dynamic linker, and should never be seen here. | |
2110 | case elfcpp::R_POWERPC_COPY: | |
2111 | case elfcpp::R_POWERPC_GLOB_DAT: | |
2112 | case elfcpp::R_POWERPC_JMP_SLOT: | |
2113 | case elfcpp::R_POWERPC_RELATIVE: | |
2114 | case elfcpp::R_POWERPC_DTPMOD: | |
2115 | gold_error(_("%s: unexpected reloc %u in object file"), | |
2116 | object->name().c_str(), r_type); | |
2117 | break; | |
2118 | ||
2119 | default: | |
2120 | unsupported_reloc_global(object, r_type, gsym); | |
2121 | break; | |
2122 | } | |
2123 | } | |
2124 | ||
6d03d481 ST |
2125 | // Process relocations for gc. |
2126 | ||
2127 | template<int size, bool big_endian> | |
2128 | void | |
2129 | Target_powerpc<size, big_endian>::gc_process_relocs( | |
d83ce4e3 AM |
2130 | Symbol_table* symtab, |
2131 | Layout* layout, | |
2132 | Sized_relobj_file<size, big_endian>* object, | |
2133 | unsigned int data_shndx, | |
2134 | unsigned int, | |
2135 | const unsigned char* prelocs, | |
2136 | size_t reloc_count, | |
2137 | Output_section* output_section, | |
2138 | bool needs_special_offset_handling, | |
2139 | size_t local_symbol_count, | |
2140 | const unsigned char* plocal_symbols) | |
6d03d481 ST |
2141 | { |
2142 | typedef Target_powerpc<size, big_endian> Powerpc; | |
2ea97941 | 2143 | typedef typename Target_powerpc<size, big_endian>::Scan Scan; |
6d03d481 | 2144 | |
41cbeecc | 2145 | gold::gc_process_relocs<size, big_endian, Powerpc, elfcpp::SHT_RELA, Scan, |
3ff2ccb0 | 2146 | typename Target_powerpc::Relocatable_size_for_reloc>( |
6d03d481 ST |
2147 | symtab, |
2148 | layout, | |
2149 | this, | |
2150 | object, | |
2151 | data_shndx, | |
2152 | prelocs, | |
2153 | reloc_count, | |
2154 | output_section, | |
2155 | needs_special_offset_handling, | |
2156 | local_symbol_count, | |
2157 | plocal_symbols); | |
2158 | } | |
2159 | ||
42cacb20 DE |
2160 | // Scan relocations for a section. |
2161 | ||
2162 | template<int size, bool big_endian> | |
2163 | void | |
2164 | Target_powerpc<size, big_endian>::scan_relocs( | |
d83ce4e3 AM |
2165 | Symbol_table* symtab, |
2166 | Layout* layout, | |
2167 | Sized_relobj_file<size, big_endian>* object, | |
2168 | unsigned int data_shndx, | |
2169 | unsigned int sh_type, | |
2170 | const unsigned char* prelocs, | |
2171 | size_t reloc_count, | |
2172 | Output_section* output_section, | |
2173 | bool needs_special_offset_handling, | |
2174 | size_t local_symbol_count, | |
2175 | const unsigned char* plocal_symbols) | |
42cacb20 DE |
2176 | { |
2177 | typedef Target_powerpc<size, big_endian> Powerpc; | |
2ea97941 | 2178 | typedef typename Target_powerpc<size, big_endian>::Scan Scan; |
42cacb20 DE |
2179 | |
2180 | if (sh_type == elfcpp::SHT_REL) | |
2181 | { | |
2182 | gold_error(_("%s: unsupported REL reloc section"), | |
2183 | object->name().c_str()); | |
2184 | return; | |
2185 | } | |
2186 | ||
cf43a2fe AM |
2187 | if (size == 32) |
2188 | { | |
2189 | static Output_data_space* sdata; | |
2190 | ||
2191 | // Define _SDA_BASE_ at the start of the .sdata section. | |
2192 | if (sdata == NULL) | |
2193 | { | |
2194 | // layout->find_output_section(".sdata") == NULL | |
2195 | sdata = new Output_data_space(4, "** sdata"); | |
2196 | Output_section* os | |
2197 | = layout->add_output_section_data(".sdata", 0, | |
2198 | elfcpp::SHF_ALLOC | |
2199 | | elfcpp::SHF_WRITE, | |
2200 | sdata, ORDER_SMALL_DATA, false); | |
2201 | symtab->define_in_output_data("_SDA_BASE_", NULL, | |
2202 | Symbol_table::PREDEFINED, | |
2203 | os, 32768, 0, elfcpp::STT_OBJECT, | |
2204 | elfcpp::STB_LOCAL, elfcpp::STV_HIDDEN, | |
2205 | 0, false, false); | |
2206 | } | |
2207 | } | |
42cacb20 | 2208 | |
2ea97941 | 2209 | gold::scan_relocs<size, big_endian, Powerpc, elfcpp::SHT_RELA, Scan>( |
42cacb20 DE |
2210 | symtab, |
2211 | layout, | |
2212 | this, | |
2213 | object, | |
2214 | data_shndx, | |
2215 | prelocs, | |
2216 | reloc_count, | |
2217 | output_section, | |
2218 | needs_special_offset_handling, | |
2219 | local_symbol_count, | |
2220 | plocal_symbols); | |
2221 | } | |
2222 | ||
2223 | // Finalize the sections. | |
2224 | ||
2225 | template<int size, bool big_endian> | |
2226 | void | |
d5b40221 DK |
2227 | Target_powerpc<size, big_endian>::do_finalize_sections( |
2228 | Layout* layout, | |
f59f41f3 DK |
2229 | const Input_objects*, |
2230 | Symbol_table*) | |
42cacb20 DE |
2231 | { |
2232 | // Fill in some more dynamic tags. | |
ea715a34 ILT |
2233 | const Reloc_section* rel_plt = (this->plt_ == NULL |
2234 | ? NULL | |
2235 | : this->plt_->rel_plt()); | |
2236 | layout->add_target_dynamic_tags(false, this->plt_, rel_plt, | |
612a8d3d | 2237 | this->rela_dyn_, true, size == 32); |
42cacb20 | 2238 | |
cf43a2fe AM |
2239 | if (size == 32) |
2240 | { | |
2241 | this->got_->finalize_data_size(); | |
2242 | Output_data_dynamic* odyn = layout->dynamic_data(); | |
2243 | odyn->add_section_plus_offset(elfcpp::DT_PPC_GOT, | |
2244 | this->got_, this->got_->g_o_t()); | |
2245 | } | |
2246 | ||
42cacb20 DE |
2247 | // Emit any relocs we saved in an attempt to avoid generating COPY |
2248 | // relocs. | |
2249 | if (this->copy_relocs_.any_saved_relocs()) | |
2250 | this->copy_relocs_.emit(this->rela_dyn_section(layout)); | |
2251 | } | |
2252 | ||
2253 | // Perform a relocation. | |
2254 | ||
2255 | template<int size, bool big_endian> | |
2256 | inline bool | |
2257 | Target_powerpc<size, big_endian>::Relocate::relocate( | |
d83ce4e3 AM |
2258 | const Relocate_info<size, big_endian>* relinfo, |
2259 | Target_powerpc* target, | |
2260 | Output_section* os, | |
2261 | size_t relnum, | |
2262 | const elfcpp::Rela<size, big_endian>& rela, | |
2263 | unsigned int r_type, | |
2264 | const Sized_symbol<size>* gsym, | |
2265 | const Symbol_value<size>* psymval, | |
2266 | unsigned char* view, | |
2267 | typename elfcpp::Elf_types<size>::Elf_Addr address, | |
2268 | section_size_type /* view_size */) | |
42cacb20 DE |
2269 | { |
2270 | const unsigned int toc_base_offset = 0x8000; | |
2271 | typedef Powerpc_relocate_functions<size, big_endian> Reloc; | |
cf43a2fe AM |
2272 | const Powerpc_relobj<size, big_endian>* const object |
2273 | = static_cast<const Powerpc_relobj<size, big_endian>*>(relinfo->object); | |
2274 | elfcpp::Elf_Xword value; | |
2275 | ||
2276 | if (r_type == elfcpp::R_POWERPC_GOT16 | |
2277 | || r_type == elfcpp::R_POWERPC_GOT16_LO | |
2278 | || r_type == elfcpp::R_POWERPC_GOT16_HI | |
2279 | || r_type == elfcpp::R_POWERPC_GOT16_HA | |
2280 | || r_type == elfcpp::R_PPC64_GOT16_DS | |
2281 | || r_type == elfcpp::R_PPC64_GOT16_LO_DS) | |
42cacb20 | 2282 | { |
cf43a2fe AM |
2283 | if (gsym != NULL) |
2284 | { | |
2285 | gold_assert(gsym->has_got_offset(GOT_TYPE_STANDARD)); | |
2286 | value = gsym->got_offset(GOT_TYPE_STANDARD); | |
2287 | } | |
2288 | else | |
2289 | { | |
2290 | unsigned int r_sym = elfcpp::elf_r_sym<size>(rela.get_r_info()); | |
2291 | gold_assert(object->local_has_got_offset(r_sym, GOT_TYPE_STANDARD)); | |
2292 | value = object->local_got_offset(r_sym, GOT_TYPE_STANDARD); | |
2293 | } | |
2294 | value -= target->got_section()->g_o_t(); | |
2295 | } | |
2296 | else if (r_type == elfcpp::R_PPC64_TOC) | |
2297 | { | |
2298 | value = target->got_section()->address() + toc_base_offset; | |
2299 | } | |
2300 | else if (gsym != NULL | |
2301 | && (r_type == elfcpp::R_POWERPC_REL24 | |
2302 | || r_type == elfcpp::R_PPC_PLTREL24) | |
2303 | && gsym->use_plt_offset(Scan::get_reference_flags(r_type))) | |
2304 | { | |
2305 | const Output_data_glink<size, big_endian>* glink; | |
2306 | ||
2307 | glink = target->glink_section(); | |
d1a8cabd | 2308 | unsigned int glink_index = glink->find_entry(gsym, rela, object); |
cf43a2fe AM |
2309 | value = glink->address() + glink_index * glink->glink_entry_size(); |
2310 | } | |
2311 | else | |
2312 | { | |
2313 | elfcpp::Elf_Xword addend = 0; | |
2314 | if (r_type != elfcpp::R_PPC_PLTREL24) | |
2315 | addend = rela.get_r_addend(); | |
2316 | value = psymval->value(object, addend); | |
42cacb20 DE |
2317 | } |
2318 | ||
42cacb20 DE |
2319 | switch (r_type) |
2320 | { | |
2321 | case elfcpp::R_PPC64_TOC16: | |
2322 | case elfcpp::R_PPC64_TOC16_LO: | |
2323 | case elfcpp::R_PPC64_TOC16_HI: | |
2324 | case elfcpp::R_PPC64_TOC16_HA: | |
2325 | case elfcpp::R_PPC64_TOC16_DS: | |
2326 | case elfcpp::R_PPC64_TOC16_LO_DS: | |
cf43a2fe AM |
2327 | // Subtract the TOC base address. |
2328 | value -= target->got_section()->address() + toc_base_offset; | |
42cacb20 DE |
2329 | break; |
2330 | ||
cf43a2fe AM |
2331 | case elfcpp::R_POWERPC_SECTOFF: |
2332 | case elfcpp::R_POWERPC_SECTOFF_LO: | |
2333 | case elfcpp::R_POWERPC_SECTOFF_HI: | |
2334 | case elfcpp::R_POWERPC_SECTOFF_HA: | |
2335 | case elfcpp::R_PPC64_SECTOFF_DS: | |
2336 | case elfcpp::R_PPC64_SECTOFF_LO_DS: | |
2337 | if (os != NULL) | |
2338 | value -= os->address(); | |
42cacb20 DE |
2339 | break; |
2340 | ||
2341 | default: | |
2342 | break; | |
2343 | } | |
2344 | ||
2345 | switch (r_type) | |
2346 | { | |
2347 | case elfcpp::R_POWERPC_NONE: | |
2348 | case elfcpp::R_POWERPC_GNU_VTINHERIT: | |
2349 | case elfcpp::R_POWERPC_GNU_VTENTRY: | |
2350 | break; | |
2351 | ||
2352 | case elfcpp::R_POWERPC_REL32: | |
cf43a2fe | 2353 | Reloc::rel32(view, value, 0, address); |
42cacb20 DE |
2354 | break; |
2355 | ||
2356 | case elfcpp::R_POWERPC_REL24: | |
42cacb20 | 2357 | case elfcpp::R_PPC_PLTREL24: |
cf43a2fe AM |
2358 | case elfcpp::R_PPC_LOCAL24PC: |
2359 | Reloc::rel24(view, value, 0, address); | |
42cacb20 DE |
2360 | break; |
2361 | ||
cf43a2fe AM |
2362 | case elfcpp::R_POWERPC_REL14: |
2363 | Reloc::rel14(view, value, 0, address); | |
42cacb20 DE |
2364 | break; |
2365 | ||
2366 | case elfcpp::R_PPC64_ADDR64: | |
cf43a2fe AM |
2367 | case elfcpp::R_PPC64_TOC: |
2368 | Relocate_functions<size, big_endian>::rela64(view, value, 0); | |
42cacb20 DE |
2369 | break; |
2370 | ||
2371 | case elfcpp::R_POWERPC_ADDR32: | |
cf43a2fe | 2372 | Relocate_functions<size, big_endian>::rela32(view, value, 0); |
42cacb20 DE |
2373 | break; |
2374 | ||
cf43a2fe AM |
2375 | case elfcpp::R_POWERPC_ADDR16: |
2376 | case elfcpp::R_PPC64_TOC16: | |
42cacb20 | 2377 | case elfcpp::R_POWERPC_GOT16: |
cf43a2fe AM |
2378 | case elfcpp::R_POWERPC_SECTOFF: |
2379 | Reloc::addr16(view, value, 0); | |
42cacb20 DE |
2380 | break; |
2381 | ||
cf43a2fe AM |
2382 | case elfcpp::R_POWERPC_ADDR16_LO: |
2383 | case elfcpp::R_PPC64_TOC16_LO: | |
42cacb20 | 2384 | case elfcpp::R_POWERPC_GOT16_LO: |
cf43a2fe AM |
2385 | case elfcpp::R_POWERPC_SECTOFF_LO: |
2386 | Reloc::addr16_lo(view, value, 0); | |
42cacb20 DE |
2387 | break; |
2388 | ||
cf43a2fe AM |
2389 | case elfcpp::R_POWERPC_ADDR16_HI: |
2390 | case elfcpp::R_PPC64_TOC16_HI: | |
42cacb20 | 2391 | case elfcpp::R_POWERPC_GOT16_HI: |
cf43a2fe AM |
2392 | case elfcpp::R_POWERPC_SECTOFF_HI: |
2393 | Reloc::addr16_hi(view, value, 0); | |
42cacb20 DE |
2394 | break; |
2395 | ||
cf43a2fe AM |
2396 | case elfcpp::R_POWERPC_ADDR16_HA: |
2397 | case elfcpp::R_PPC64_TOC16_HA: | |
42cacb20 | 2398 | case elfcpp::R_POWERPC_GOT16_HA: |
cf43a2fe AM |
2399 | case elfcpp::R_POWERPC_SECTOFF_HA: |
2400 | Reloc::addr16_ha(view, value, 0); | |
42cacb20 DE |
2401 | break; |
2402 | ||
cf43a2fe AM |
2403 | case elfcpp::R_PPC_REL16_LO: |
2404 | Reloc::rel16_lo(view, value, 0, address); | |
42cacb20 DE |
2405 | break; |
2406 | ||
cf43a2fe AM |
2407 | case elfcpp::R_PPC_REL16_HI: |
2408 | Reloc::rel16_hi(view, value, 0, address); | |
42cacb20 DE |
2409 | break; |
2410 | ||
cf43a2fe AM |
2411 | case elfcpp::R_PPC_REL16_HA: |
2412 | Reloc::rel16_ha(view, value, 0, address); | |
42cacb20 DE |
2413 | break; |
2414 | ||
cf43a2fe AM |
2415 | case elfcpp::R_PPC64_ADDR16_DS: |
2416 | case elfcpp::R_PPC64_ADDR16_LO_DS: | |
42cacb20 DE |
2417 | case elfcpp::R_PPC64_TOC16_DS: |
2418 | case elfcpp::R_PPC64_TOC16_LO_DS: | |
cf43a2fe AM |
2419 | case elfcpp::R_PPC64_GOT16_DS: |
2420 | case elfcpp::R_PPC64_GOT16_LO_DS: | |
2421 | case elfcpp::R_PPC64_SECTOFF_DS: | |
2422 | case elfcpp::R_PPC64_SECTOFF_LO_DS: | |
2423 | Reloc::addr16_ds(view, value, 0); | |
42cacb20 DE |
2424 | break; |
2425 | ||
2426 | case elfcpp::R_POWERPC_COPY: | |
2427 | case elfcpp::R_POWERPC_GLOB_DAT: | |
2428 | case elfcpp::R_POWERPC_JMP_SLOT: | |
2429 | case elfcpp::R_POWERPC_RELATIVE: | |
2430 | // This is an outstanding tls reloc, which is unexpected when | |
2431 | // linking. | |
2432 | case elfcpp::R_POWERPC_DTPMOD: | |
2433 | gold_error_at_location(relinfo, relnum, rela.get_r_offset(), | |
2434 | _("unexpected reloc %u in object file"), | |
2435 | r_type); | |
2436 | break; | |
2437 | ||
2438 | default: | |
2439 | gold_error_at_location(relinfo, relnum, rela.get_r_offset(), | |
2440 | _("unsupported reloc %u"), | |
2441 | r_type); | |
2442 | break; | |
2443 | } | |
2444 | ||
2445 | return true; | |
2446 | } | |
2447 | ||
2448 | // Perform a TLS relocation. | |
2449 | ||
2450 | template<int size, bool big_endian> | |
2451 | inline void | |
2452 | Target_powerpc<size, big_endian>::Relocate::relocate_tls( | |
d83ce4e3 AM |
2453 | const Relocate_info<size, big_endian>* relinfo, |
2454 | Target_powerpc<size, big_endian>* target, | |
2455 | size_t relnum, | |
2456 | const elfcpp::Rela<size, big_endian>& rela, | |
2457 | unsigned int r_type, | |
2458 | const Sized_symbol<size>* gsym, | |
2459 | const Symbol_value<size>* psymval, | |
2460 | unsigned char* view, | |
2461 | typename elfcpp::Elf_types<size>::Elf_Addr address, | |
2462 | section_size_type) | |
42cacb20 DE |
2463 | { |
2464 | Output_segment* tls_segment = relinfo->layout->tls_segment(); | |
6fa2a40b | 2465 | const Sized_relobj_file<size, big_endian>* object = relinfo->object; |
42cacb20 DE |
2466 | |
2467 | const elfcpp::Elf_Xword addend = rela.get_r_addend(); | |
2468 | typename elfcpp::Elf_types<size>::Elf_Addr value = psymval->value(object, 0); | |
2469 | ||
2470 | const bool is_final = | |
2471 | (gsym == NULL | |
2472 | ? !parameters->options().output_is_position_independent() | |
2473 | : gsym->final_value_is_known()); | |
42cacb20 DE |
2474 | |
2475 | switch (r_type) | |
2476 | { | |
2477 | // XXX | |
2478 | } | |
2479 | } | |
2480 | ||
2481 | // Relocate section data. | |
2482 | ||
2483 | template<int size, bool big_endian> | |
2484 | void | |
2485 | Target_powerpc<size, big_endian>::relocate_section( | |
d83ce4e3 AM |
2486 | const Relocate_info<size, big_endian>* relinfo, |
2487 | unsigned int sh_type, | |
2488 | const unsigned char* prelocs, | |
2489 | size_t reloc_count, | |
2490 | Output_section* output_section, | |
2491 | bool needs_special_offset_handling, | |
2492 | unsigned char* view, | |
2493 | typename elfcpp::Elf_types<size>::Elf_Addr address, | |
2494 | section_size_type view_size, | |
2495 | const Reloc_symbol_changes* reloc_symbol_changes) | |
42cacb20 DE |
2496 | { |
2497 | typedef Target_powerpc<size, big_endian> Powerpc; | |
2498 | typedef typename Target_powerpc<size, big_endian>::Relocate Powerpc_relocate; | |
2499 | ||
2500 | gold_assert(sh_type == elfcpp::SHT_RELA); | |
2501 | ||
2502 | gold::relocate_section<size, big_endian, Powerpc, elfcpp::SHT_RELA, | |
d83ce4e3 | 2503 | Powerpc_relocate>( |
42cacb20 DE |
2504 | relinfo, |
2505 | this, | |
2506 | prelocs, | |
2507 | reloc_count, | |
2508 | output_section, | |
2509 | needs_special_offset_handling, | |
2510 | view, | |
2511 | address, | |
364c7fa5 ILT |
2512 | view_size, |
2513 | reloc_symbol_changes); | |
42cacb20 DE |
2514 | } |
2515 | ||
cf43a2fe | 2516 | class Powerpc_scan_relocatable_reloc |
42cacb20 | 2517 | { |
cf43a2fe AM |
2518 | public: |
2519 | // Return the strategy to use for a local symbol which is not a | |
2520 | // section symbol, given the relocation type. | |
2521 | inline Relocatable_relocs::Reloc_strategy | |
2522 | local_non_section_strategy(unsigned int r_type, Relobj*, unsigned int r_sym) | |
2523 | { | |
2524 | if (r_type == 0 && r_sym == 0) | |
2525 | return Relocatable_relocs::RELOC_DISCARD; | |
2526 | return Relocatable_relocs::RELOC_COPY; | |
2527 | } | |
2528 | ||
2529 | // Return the strategy to use for a local symbol which is a section | |
2530 | // symbol, given the relocation type. | |
2531 | inline Relocatable_relocs::Reloc_strategy | |
2532 | local_section_strategy(unsigned int, Relobj*) | |
2533 | { | |
2534 | return Relocatable_relocs::RELOC_ADJUST_FOR_SECTION_RELA; | |
2535 | } | |
2536 | ||
2537 | // Return the strategy to use for a global symbol, given the | |
2538 | // relocation type, the object, and the symbol index. | |
2539 | inline Relocatable_relocs::Reloc_strategy | |
2540 | global_strategy(unsigned int r_type, Relobj*, unsigned int) | |
2541 | { | |
2542 | if (r_type == elfcpp::R_PPC_PLTREL24) | |
2543 | return Relocatable_relocs::RELOC_SPECIAL; | |
2544 | return Relocatable_relocs::RELOC_COPY; | |
2545 | } | |
2546 | }; | |
42cacb20 DE |
2547 | |
2548 | // Scan the relocs during a relocatable link. | |
2549 | ||
2550 | template<int size, bool big_endian> | |
2551 | void | |
2552 | Target_powerpc<size, big_endian>::scan_relocatable_relocs( | |
d83ce4e3 AM |
2553 | Symbol_table* symtab, |
2554 | Layout* layout, | |
2555 | Sized_relobj_file<size, big_endian>* object, | |
2556 | unsigned int data_shndx, | |
2557 | unsigned int sh_type, | |
2558 | const unsigned char* prelocs, | |
2559 | size_t reloc_count, | |
2560 | Output_section* output_section, | |
2561 | bool needs_special_offset_handling, | |
2562 | size_t local_symbol_count, | |
2563 | const unsigned char* plocal_symbols, | |
2564 | Relocatable_relocs* rr) | |
42cacb20 DE |
2565 | { |
2566 | gold_assert(sh_type == elfcpp::SHT_RELA); | |
2567 | ||
42cacb20 | 2568 | gold::scan_relocatable_relocs<size, big_endian, elfcpp::SHT_RELA, |
d83ce4e3 | 2569 | Powerpc_scan_relocatable_reloc>( |
42cacb20 DE |
2570 | symtab, |
2571 | layout, | |
2572 | object, | |
2573 | data_shndx, | |
2574 | prelocs, | |
2575 | reloc_count, | |
2576 | output_section, | |
2577 | needs_special_offset_handling, | |
2578 | local_symbol_count, | |
2579 | plocal_symbols, | |
2580 | rr); | |
2581 | } | |
2582 | ||
2583 | // Relocate a section during a relocatable link. | |
2584 | ||
2585 | template<int size, bool big_endian> | |
2586 | void | |
2587 | Target_powerpc<size, big_endian>::relocate_for_relocatable( | |
2588 | const Relocate_info<size, big_endian>* relinfo, | |
2589 | unsigned int sh_type, | |
2590 | const unsigned char* prelocs, | |
2591 | size_t reloc_count, | |
2592 | Output_section* output_section, | |
2593 | off_t offset_in_output_section, | |
2594 | const Relocatable_relocs* rr, | |
cf43a2fe AM |
2595 | unsigned char*, |
2596 | typename elfcpp::Elf_types<size>::Elf_Addr, | |
2597 | section_size_type, | |
42cacb20 DE |
2598 | unsigned char* reloc_view, |
2599 | section_size_type reloc_view_size) | |
2600 | { | |
2601 | gold_assert(sh_type == elfcpp::SHT_RELA); | |
2602 | ||
cf43a2fe AM |
2603 | typedef typename elfcpp::Elf_types<size>::Elf_Addr Address; |
2604 | typedef typename Reloc_types<elfcpp::SHT_RELA, size, big_endian>::Reloc | |
2605 | Reltype; | |
2606 | typedef typename Reloc_types<elfcpp::SHT_RELA, size, big_endian>::Reloc_write | |
2607 | Reltype_write; | |
2608 | const int reloc_size | |
2609 | = Reloc_types<elfcpp::SHT_RELA, size, big_endian>::reloc_size; | |
2610 | const Address invalid_address = static_cast<Address>(0) - 1; | |
2611 | ||
2612 | Powerpc_relobj<size, big_endian>* const object | |
2613 | = static_cast<Powerpc_relobj<size, big_endian>*>(relinfo->object); | |
2614 | const unsigned int local_count = object->local_symbol_count(); | |
2615 | unsigned int got2_shndx = object->got2_shndx(); | |
2616 | typename elfcpp::Elf_types<size>::Elf_Swxword got2_addend = 0; | |
2617 | if (got2_shndx != 0) | |
2618 | got2_addend = object->get_output_section_offset(got2_shndx); | |
2619 | ||
2620 | unsigned char* pwrite = reloc_view; | |
2621 | ||
2622 | for (size_t i = 0; i < reloc_count; ++i, prelocs += reloc_size) | |
2623 | { | |
2624 | Relocatable_relocs::Reloc_strategy strategy = rr->strategy(i); | |
2625 | if (strategy == Relocatable_relocs::RELOC_DISCARD) | |
2626 | continue; | |
2627 | ||
2628 | Reltype reloc(prelocs); | |
2629 | Reltype_write reloc_write(pwrite); | |
2630 | ||
2631 | typename elfcpp::Elf_types<size>::Elf_WXword r_info = reloc.get_r_info(); | |
2632 | const unsigned int r_sym = elfcpp::elf_r_sym<size>(r_info); | |
2633 | const unsigned int r_type = elfcpp::elf_r_type<size>(r_info); | |
2634 | ||
2635 | // Get the new symbol index. | |
2636 | ||
2637 | unsigned int new_symndx; | |
2638 | if (r_sym < local_count) | |
2639 | { | |
2640 | switch (strategy) | |
2641 | { | |
2642 | case Relocatable_relocs::RELOC_COPY: | |
2643 | case Relocatable_relocs::RELOC_SPECIAL: | |
2644 | new_symndx = object->symtab_index(r_sym); | |
2645 | gold_assert(new_symndx != -1U); | |
2646 | break; | |
2647 | ||
2648 | case Relocatable_relocs::RELOC_ADJUST_FOR_SECTION_RELA: | |
2649 | { | |
2650 | // We are adjusting a section symbol. We need to find | |
2651 | // the symbol table index of the section symbol for | |
2652 | // the output section corresponding to input section | |
2653 | // in which this symbol is defined. | |
2654 | gold_assert(r_sym < local_count); | |
2655 | bool is_ordinary; | |
2656 | unsigned int shndx = | |
2657 | object->local_symbol_input_shndx(r_sym, &is_ordinary); | |
2658 | gold_assert(is_ordinary); | |
2659 | Output_section* os = object->output_section(shndx); | |
2660 | gold_assert(os != NULL); | |
2661 | gold_assert(os->needs_symtab_index()); | |
2662 | new_symndx = os->symtab_index(); | |
2663 | } | |
2664 | break; | |
2665 | ||
2666 | default: | |
2667 | gold_unreachable(); | |
2668 | } | |
2669 | } | |
2670 | else | |
2671 | { | |
2672 | const Symbol* gsym = object->global_symbol(r_sym); | |
2673 | gold_assert(gsym != NULL); | |
2674 | if (gsym->is_forwarder()) | |
2675 | gsym = relinfo->symtab->resolve_forwards(gsym); | |
2676 | ||
2677 | gold_assert(gsym->has_symtab_index()); | |
2678 | new_symndx = gsym->symtab_index(); | |
2679 | } | |
2680 | ||
2681 | // Get the new offset--the location in the output section where | |
2682 | // this relocation should be applied. | |
2683 | ||
2684 | Address offset = reloc.get_r_offset(); | |
2685 | Address new_offset; | |
2686 | if (static_cast<Address>(offset_in_output_section) != invalid_address) | |
2687 | new_offset = offset + offset_in_output_section; | |
2688 | else | |
2689 | { | |
2690 | section_offset_type sot_offset = | |
2691 | convert_types<section_offset_type, Address>(offset); | |
2692 | section_offset_type new_sot_offset = | |
2693 | output_section->output_offset(object, relinfo->data_shndx, | |
2694 | sot_offset); | |
2695 | gold_assert(new_sot_offset != -1); | |
2696 | new_offset = new_sot_offset; | |
2697 | } | |
2698 | ||
2699 | reloc_write.put_r_offset(new_offset); | |
2700 | reloc_write.put_r_info(elfcpp::elf_r_info<size>(new_symndx, r_type)); | |
2701 | ||
2702 | // Handle the reloc addend based on the strategy. | |
2703 | typename elfcpp::Elf_types<size>::Elf_Swxword addend; | |
2704 | addend = Reloc_types<elfcpp::SHT_RELA, size, big_endian>:: | |
2705 | get_reloc_addend(&reloc); | |
2706 | ||
2707 | if (strategy == Relocatable_relocs::RELOC_COPY) | |
2708 | ; | |
2709 | else if (strategy == Relocatable_relocs::RELOC_ADJUST_FOR_SECTION_RELA) | |
2710 | { | |
2711 | const Symbol_value<size>* psymval = object->local_symbol(r_sym); | |
2712 | ||
2713 | addend = psymval->value(object, addend); | |
2714 | } | |
2715 | else if (strategy == Relocatable_relocs::RELOC_SPECIAL) | |
2716 | { | |
2717 | if (addend >= 32768) | |
2718 | addend += got2_addend; | |
2719 | } | |
2720 | else | |
2721 | gold_unreachable(); | |
2722 | ||
2723 | Reloc_types<elfcpp::SHT_RELA, size, big_endian>:: | |
2724 | set_reloc_addend(&reloc_write, addend); | |
2725 | ||
2726 | pwrite += reloc_size; | |
2727 | } | |
2728 | ||
2729 | gold_assert(static_cast<section_size_type>(pwrite - reloc_view) | |
2730 | == reloc_view_size); | |
42cacb20 DE |
2731 | } |
2732 | ||
2733 | // Return the value to use for a dynamic which requires special | |
2734 | // treatment. This is how we support equality comparisons of function | |
2735 | // pointers across shared library boundaries, as described in the | |
2736 | // processor specific ABI supplement. | |
2737 | ||
2738 | template<int size, bool big_endian> | |
2739 | uint64_t | |
2740 | Target_powerpc<size, big_endian>::do_dynsym_value(const Symbol* gsym) const | |
2741 | { | |
cf43a2fe AM |
2742 | if (size == 32) |
2743 | { | |
2744 | gold_assert(gsym->is_from_dynobj() && gsym->has_plt_offset()); | |
2745 | return this->plt_section()->address() + gsym->plt_offset(); | |
2746 | } | |
2747 | else | |
2748 | gold_unreachable(); | |
42cacb20 DE |
2749 | } |
2750 | ||
2751 | // The selector for powerpc object files. | |
2752 | ||
2753 | template<int size, bool big_endian> | |
2754 | class Target_selector_powerpc : public Target_selector | |
2755 | { | |
2756 | public: | |
2757 | Target_selector_powerpc() | |
2758 | : Target_selector(elfcpp::EM_NONE, size, big_endian, | |
03ef7571 ILT |
2759 | (size == 64 |
2760 | ? (big_endian ? "elf64-powerpc" : "elf64-powerpcle") | |
2761 | : (big_endian ? "elf32-powerpc" : "elf32-powerpcle")), | |
2762 | (size == 64 | |
2763 | ? (big_endian ? "elf64ppc" : "elf64lppc") | |
2764 | : (big_endian ? "elf32ppc" : "elf32lppc"))) | |
42cacb20 DE |
2765 | { } |
2766 | ||
2e702c99 RM |
2767 | virtual Target* |
2768 | do_recognize(Input_file*, off_t, int machine, int, int) | |
42cacb20 DE |
2769 | { |
2770 | switch (size) | |
2771 | { | |
2772 | case 64: | |
2ea97941 | 2773 | if (machine != elfcpp::EM_PPC64) |
42cacb20 DE |
2774 | return NULL; |
2775 | break; | |
2776 | ||
2777 | case 32: | |
2ea97941 | 2778 | if (machine != elfcpp::EM_PPC) |
42cacb20 DE |
2779 | return NULL; |
2780 | break; | |
2781 | ||
2782 | default: | |
2783 | return NULL; | |
2784 | } | |
2785 | ||
7f055c20 | 2786 | return this->instantiate_target(); |
42cacb20 DE |
2787 | } |
2788 | ||
2e702c99 RM |
2789 | virtual Target* |
2790 | do_instantiate_target() | |
7f055c20 | 2791 | { return new Target_powerpc<size, big_endian>(); } |
42cacb20 DE |
2792 | }; |
2793 | ||
2794 | Target_selector_powerpc<32, true> target_selector_ppc32; | |
2795 | Target_selector_powerpc<32, false> target_selector_ppc32le; | |
2796 | Target_selector_powerpc<64, true> target_selector_ppc64; | |
2797 | Target_selector_powerpc<64, false> target_selector_ppc64le; | |
2798 | ||
2799 | } // End anonymous namespace. |