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42cacb20 DE |
1 | // powerpc.cc -- powerpc target support for gold. |
2 | ||
6d03d481 | 3 | // Copyright 2008, 2009 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" | |
40 | ||
41 | namespace | |
42 | { | |
43 | ||
44 | using namespace gold; | |
45 | ||
46 | template<int size, bool big_endian> | |
47 | class Output_data_plt_powerpc; | |
48 | ||
49 | template<int size, bool big_endian> | |
50 | class Target_powerpc : public Sized_target<size, big_endian> | |
51 | { | |
52 | public: | |
53 | typedef Output_data_reloc<elfcpp::SHT_RELA, true, size, big_endian> Reloc_section; | |
54 | ||
55 | Target_powerpc() | |
56 | : Sized_target<size, big_endian>(&powerpc_info), | |
57 | got_(NULL), got2_(NULL), toc_(NULL), | |
58 | plt_(NULL), rela_dyn_(NULL), | |
59 | copy_relocs_(elfcpp::R_POWERPC_COPY), | |
60 | dynbss_(NULL), got_mod_index_offset_(-1U) | |
61 | { | |
62 | } | |
63 | ||
6d03d481 ST |
64 | // Process the relocations to determine unreferenced sections for |
65 | // garbage collection. | |
66 | void | |
67 | gc_process_relocs(const General_options& options, | |
68 | Symbol_table* symtab, | |
69 | Layout* layout, | |
70 | Sized_relobj<size, big_endian>* object, | |
71 | unsigned int data_shndx, | |
72 | unsigned int sh_type, | |
73 | const unsigned char* prelocs, | |
74 | size_t reloc_count, | |
75 | Output_section* output_section, | |
76 | bool needs_special_offset_handling, | |
77 | size_t local_symbol_count, | |
78 | const unsigned char* plocal_symbols); | |
79 | ||
42cacb20 DE |
80 | // Scan the relocations to look for symbol adjustments. |
81 | void | |
82 | scan_relocs(const General_options& options, | |
83 | Symbol_table* symtab, | |
84 | Layout* layout, | |
85 | Sized_relobj<size, big_endian>* object, | |
86 | unsigned int data_shndx, | |
87 | unsigned int sh_type, | |
88 | const unsigned char* prelocs, | |
89 | size_t reloc_count, | |
90 | Output_section* output_section, | |
91 | bool needs_special_offset_handling, | |
92 | size_t local_symbol_count, | |
93 | const unsigned char* plocal_symbols); | |
94 | // Finalize the sections. | |
95 | void | |
96 | do_finalize_sections(Layout*); | |
97 | ||
98 | // Return the value to use for a dynamic which requires special | |
99 | // treatment. | |
100 | uint64_t | |
101 | do_dynsym_value(const Symbol*) const; | |
102 | ||
103 | // Relocate a section. | |
104 | void | |
105 | relocate_section(const Relocate_info<size, big_endian>*, | |
106 | unsigned int sh_type, | |
107 | const unsigned char* prelocs, | |
108 | size_t reloc_count, | |
109 | Output_section* output_section, | |
110 | bool needs_special_offset_handling, | |
111 | unsigned char* view, | |
112 | typename elfcpp::Elf_types<size>::Elf_Addr view_address, | |
113 | section_size_type view_size); | |
114 | ||
115 | // Scan the relocs during a relocatable link. | |
116 | void | |
117 | scan_relocatable_relocs(const General_options& options, | |
118 | Symbol_table* symtab, | |
119 | Layout* layout, | |
120 | Sized_relobj<size, big_endian>* object, | |
121 | unsigned int data_shndx, | |
122 | unsigned int sh_type, | |
123 | const unsigned char* prelocs, | |
124 | size_t reloc_count, | |
125 | Output_section* output_section, | |
126 | bool needs_special_offset_handling, | |
127 | size_t local_symbol_count, | |
128 | const unsigned char* plocal_symbols, | |
129 | Relocatable_relocs*); | |
130 | ||
131 | // Relocate a section during a relocatable link. | |
132 | void | |
133 | relocate_for_relocatable(const Relocate_info<size, big_endian>*, | |
134 | unsigned int sh_type, | |
135 | const unsigned char* prelocs, | |
136 | size_t reloc_count, | |
137 | Output_section* output_section, | |
138 | off_t offset_in_output_section, | |
139 | const Relocatable_relocs*, | |
140 | unsigned char* view, | |
141 | typename elfcpp::Elf_types<size>::Elf_Addr view_address, | |
142 | section_size_type view_size, | |
143 | unsigned char* reloc_view, | |
144 | section_size_type reloc_view_size); | |
145 | ||
146 | // Return whether SYM is defined by the ABI. | |
147 | bool | |
9c2d0ef9 | 148 | do_is_defined_by_abi(const Symbol* sym) const |
42cacb20 DE |
149 | { |
150 | return strcmp(sym->name(), "___tls_get_addr") == 0; | |
151 | } | |
152 | ||
153 | // Return the size of the GOT section. | |
154 | section_size_type | |
155 | got_size() | |
156 | { | |
157 | gold_assert(this->got_ != NULL); | |
158 | return this->got_->data_size(); | |
159 | } | |
160 | ||
161 | private: | |
162 | ||
163 | // The class which scans relocations. | |
164 | class Scan | |
165 | { | |
166 | public: | |
167 | Scan() | |
168 | : issued_non_pic_error_(false) | |
169 | { } | |
170 | ||
171 | inline void | |
172 | local(const General_options& options, Symbol_table* symtab, | |
173 | Layout* layout, Target_powerpc* target, | |
174 | Sized_relobj<size, big_endian>* object, | |
175 | unsigned int data_shndx, | |
176 | Output_section* output_section, | |
177 | const elfcpp::Rela<size, big_endian>& reloc, unsigned int r_type, | |
178 | const elfcpp::Sym<size, big_endian>& lsym); | |
179 | ||
180 | inline void | |
181 | global(const General_options& options, Symbol_table* symtab, | |
182 | Layout* layout, Target_powerpc* target, | |
183 | Sized_relobj<size, big_endian>* object, | |
184 | unsigned int data_shndx, | |
185 | Output_section* output_section, | |
186 | const elfcpp::Rela<size, big_endian>& reloc, unsigned int r_type, | |
187 | Symbol* gsym); | |
188 | ||
189 | private: | |
190 | static void | |
191 | unsupported_reloc_local(Sized_relobj<size, big_endian>*, | |
192 | unsigned int r_type); | |
193 | ||
194 | static void | |
195 | unsupported_reloc_global(Sized_relobj<size, big_endian>*, | |
196 | unsigned int r_type, Symbol*); | |
197 | ||
198 | static void | |
199 | generate_tls_call(Symbol_table* symtab, Layout* layout, | |
200 | Target_powerpc* target); | |
201 | ||
202 | void | |
203 | check_non_pic(Relobj*, unsigned int r_type); | |
204 | ||
205 | // Whether we have issued an error about a non-PIC compilation. | |
206 | bool issued_non_pic_error_; | |
207 | }; | |
208 | ||
209 | // The class which implements relocation. | |
210 | class Relocate | |
211 | { | |
212 | public: | |
213 | // Do a relocation. Return false if the caller should not issue | |
214 | // any warnings about this relocation. | |
215 | inline bool | |
216 | relocate(const Relocate_info<size, big_endian>*, Target_powerpc*, | |
031cdbed ILT |
217 | Output_section*, size_t relnum, |
218 | const elfcpp::Rela<size, big_endian>&, | |
42cacb20 DE |
219 | unsigned int r_type, const Sized_symbol<size>*, |
220 | const Symbol_value<size>*, | |
221 | unsigned char*, | |
222 | typename elfcpp::Elf_types<size>::Elf_Addr, | |
223 | section_size_type); | |
224 | ||
225 | private: | |
226 | // Do a TLS relocation. | |
227 | inline void | |
228 | relocate_tls(const Relocate_info<size, big_endian>*, | |
229 | Target_powerpc* target, | |
230 | size_t relnum, const elfcpp::Rela<size, big_endian>&, | |
231 | unsigned int r_type, const Sized_symbol<size>*, | |
232 | const Symbol_value<size>*, | |
233 | unsigned char*, | |
234 | typename elfcpp::Elf_types<size>::Elf_Addr, | |
235 | section_size_type); | |
236 | }; | |
237 | ||
238 | // A class which returns the size required for a relocation type, | |
239 | // used while scanning relocs during a relocatable link. | |
240 | class Relocatable_size_for_reloc | |
241 | { | |
242 | public: | |
243 | unsigned int | |
244 | get_size_for_reloc(unsigned int, Relobj*); | |
245 | }; | |
246 | ||
247 | // Get the GOT section, creating it if necessary. | |
248 | Output_data_got<size, big_endian>* | |
249 | got_section(Symbol_table*, Layout*); | |
250 | ||
251 | Output_data_space* | |
252 | got2_section() const | |
253 | { | |
254 | gold_assert (this->got2_ != NULL); | |
255 | return this->got2_; | |
256 | } | |
257 | ||
258 | // Get the TOC section. | |
259 | Output_data_space* | |
260 | toc_section() const | |
261 | { | |
262 | gold_assert (this->toc_ != NULL); | |
263 | return this->toc_; | |
264 | } | |
265 | ||
266 | // Create a PLT entry for a global symbol. | |
267 | void | |
268 | make_plt_entry(Symbol_table*, Layout*, Symbol*); | |
269 | ||
270 | // Create a GOT entry for the TLS module index. | |
271 | unsigned int | |
272 | got_mod_index_entry(Symbol_table* symtab, Layout* layout, | |
273 | Sized_relobj<size, big_endian>* object); | |
274 | ||
275 | // Get the PLT section. | |
276 | const Output_data_plt_powerpc<size, big_endian>* | |
277 | plt_section() const | |
278 | { | |
279 | gold_assert(this->plt_ != NULL); | |
280 | return this->plt_; | |
281 | } | |
282 | ||
283 | // Get the dynamic reloc section, creating it if necessary. | |
284 | Reloc_section* | |
285 | rela_dyn_section(Layout*); | |
286 | ||
287 | // Return true if the symbol may need a COPY relocation. | |
288 | // References from an executable object to non-function symbols | |
289 | // defined in a dynamic object may need a COPY relocation. | |
290 | bool | |
291 | may_need_copy_reloc(Symbol* gsym) | |
292 | { | |
293 | return (!parameters->options().shared() | |
294 | && gsym->is_from_dynobj() | |
295 | && gsym->type() != elfcpp::STT_FUNC); | |
296 | } | |
297 | ||
298 | // Copy a relocation against a global symbol. | |
299 | void | |
ef9beddf ILT |
300 | copy_reloc(Symbol_table* symtab, Layout* layout, |
301 | Sized_relobj<size, big_endian>* object, | |
42cacb20 DE |
302 | unsigned int shndx, Output_section* output_section, |
303 | Symbol* sym, const elfcpp::Rela<size, big_endian>& reloc) | |
304 | { | |
305 | this->copy_relocs_.copy_reloc(symtab, layout, | |
306 | symtab->get_sized_symbol<size>(sym), | |
307 | object, shndx, output_section, | |
308 | reloc, this->rela_dyn_section(layout)); | |
309 | } | |
310 | ||
311 | // Information about this specific target which we pass to the | |
312 | // general Target structure. | |
313 | static Target::Target_info powerpc_info; | |
314 | ||
315 | // The types of GOT entries needed for this platform. | |
316 | enum Got_type | |
317 | { | |
318 | GOT_TYPE_STANDARD = 0, // GOT entry for a regular symbol | |
319 | GOT_TYPE_TLS_OFFSET = 1, // GOT entry for TLS offset | |
320 | GOT_TYPE_TLS_PAIR = 2, // GOT entry for TLS module/offset pair | |
321 | }; | |
322 | ||
323 | // The GOT section. | |
324 | Output_data_got<size, big_endian>* got_; | |
325 | // The GOT2 section. | |
326 | Output_data_space* got2_; | |
327 | // The TOC section. | |
328 | Output_data_space* toc_; | |
329 | // The PLT section. | |
330 | Output_data_plt_powerpc<size, big_endian>* plt_; | |
331 | // The dynamic reloc section. | |
332 | Reloc_section* rela_dyn_; | |
333 | // Relocs saved to avoid a COPY reloc. | |
334 | Copy_relocs<elfcpp::SHT_RELA, size, big_endian> copy_relocs_; | |
335 | // Space for variables copied with a COPY reloc. | |
336 | Output_data_space* dynbss_; | |
337 | // Offset of the GOT entry for the TLS module index; | |
338 | unsigned int got_mod_index_offset_; | |
339 | }; | |
340 | ||
341 | template<> | |
342 | Target::Target_info Target_powerpc<32, true>::powerpc_info = | |
343 | { | |
344 | 32, // size | |
345 | true, // is_big_endian | |
346 | elfcpp::EM_PPC, // machine_code | |
347 | false, // has_make_symbol | |
348 | false, // has_resolve | |
349 | false, // has_code_fill | |
350 | true, // is_default_stack_executable | |
351 | '\0', // wrap_char | |
352 | "/usr/lib/ld.so.1", // dynamic_linker | |
353 | 0x10000000, // default_text_segment_address | |
354 | 64 * 1024, // abi_pagesize (overridable by -z max-page-size) | |
8a5e3e08 ILT |
355 | 4 * 1024, // common_pagesize (overridable by -z common-page-size) |
356 | elfcpp::SHN_UNDEF, // small_common_shndx | |
357 | elfcpp::SHN_UNDEF, // large_common_shndx | |
358 | 0, // small_common_section_flags | |
359 | 0 // large_common_section_flags | |
42cacb20 DE |
360 | }; |
361 | ||
362 | template<> | |
363 | Target::Target_info Target_powerpc<32, false>::powerpc_info = | |
364 | { | |
365 | 32, // size | |
366 | false, // is_big_endian | |
367 | elfcpp::EM_PPC, // machine_code | |
368 | false, // has_make_symbol | |
369 | false, // has_resolve | |
370 | false, // has_code_fill | |
371 | true, // is_default_stack_executable | |
372 | '\0', // wrap_char | |
373 | "/usr/lib/ld.so.1", // dynamic_linker | |
374 | 0x10000000, // default_text_segment_address | |
375 | 64 * 1024, // abi_pagesize (overridable by -z max-page-size) | |
8a5e3e08 ILT |
376 | 4 * 1024, // common_pagesize (overridable by -z common-page-size) |
377 | elfcpp::SHN_UNDEF, // small_common_shndx | |
378 | elfcpp::SHN_UNDEF, // large_common_shndx | |
379 | 0, // small_common_section_flags | |
380 | 0 // large_common_section_flags | |
42cacb20 DE |
381 | }; |
382 | ||
383 | template<> | |
384 | Target::Target_info Target_powerpc<64, true>::powerpc_info = | |
385 | { | |
386 | 64, // size | |
387 | true, // is_big_endian | |
388 | elfcpp::EM_PPC64, // machine_code | |
389 | false, // has_make_symbol | |
390 | false, // has_resolve | |
391 | false, // has_code_fill | |
392 | true, // is_default_stack_executable | |
393 | '\0', // wrap_char | |
394 | "/usr/lib/ld.so.1", // dynamic_linker | |
395 | 0x10000000, // default_text_segment_address | |
396 | 64 * 1024, // abi_pagesize (overridable by -z max-page-size) | |
8a5e3e08 ILT |
397 | 8 * 1024, // common_pagesize (overridable by -z common-page-size) |
398 | elfcpp::SHN_UNDEF, // small_common_shndx | |
399 | elfcpp::SHN_UNDEF, // large_common_shndx | |
400 | 0, // small_common_section_flags | |
401 | 0 // large_common_section_flags | |
42cacb20 DE |
402 | }; |
403 | ||
404 | template<> | |
405 | Target::Target_info Target_powerpc<64, false>::powerpc_info = | |
406 | { | |
407 | 64, // size | |
408 | false, // is_big_endian | |
409 | elfcpp::EM_PPC64, // machine_code | |
410 | false, // has_make_symbol | |
411 | false, // has_resolve | |
412 | false, // has_code_fill | |
413 | true, // is_default_stack_executable | |
414 | '\0', // wrap_char | |
415 | "/usr/lib/ld.so.1", // dynamic_linker | |
416 | 0x10000000, // default_text_segment_address | |
417 | 64 * 1024, // abi_pagesize (overridable by -z max-page-size) | |
8a5e3e08 ILT |
418 | 8 * 1024, // common_pagesize (overridable by -z common-page-size) |
419 | elfcpp::SHN_UNDEF, // small_common_shndx | |
420 | elfcpp::SHN_UNDEF, // large_common_shndx | |
421 | 0, // small_common_section_flags | |
422 | 0 // large_common_section_flags | |
42cacb20 DE |
423 | }; |
424 | ||
425 | template<int size, bool big_endian> | |
426 | class Powerpc_relocate_functions | |
427 | { | |
428 | private: | |
429 | // Do a simple relocation with the addend in the relocation. | |
430 | template<int valsize> | |
431 | static inline void | |
432 | rela(unsigned char* view, | |
433 | unsigned int right_shift, | |
434 | elfcpp::Elf_Xword dst_mask, | |
435 | typename elfcpp::Swap<size, big_endian>::Valtype value, | |
436 | typename elfcpp::Swap<size, big_endian>::Valtype addend) | |
437 | { | |
438 | typedef typename elfcpp::Swap<valsize, big_endian>::Valtype Valtype; | |
439 | Valtype* wv = reinterpret_cast<Valtype*>(view); | |
440 | Valtype val = elfcpp::Swap<valsize, big_endian>::readval(wv); | |
441 | Valtype reloc = ((value + addend) >> right_shift); | |
442 | ||
443 | val &= ~dst_mask; | |
444 | reloc &= dst_mask; | |
445 | ||
446 | elfcpp::Swap<valsize, big_endian>::writeval(wv, val | reloc); | |
447 | } | |
448 | ||
449 | // Do a simple relocation using a symbol value with the addend in | |
450 | // the relocation. | |
451 | template<int valsize> | |
452 | static inline void | |
453 | rela(unsigned char* view, | |
454 | unsigned int right_shift, | |
455 | elfcpp::Elf_Xword dst_mask, | |
456 | const Sized_relobj<size, big_endian>* object, | |
457 | const Symbol_value<size>* psymval, | |
458 | typename elfcpp::Swap<valsize, big_endian>::Valtype addend) | |
459 | { | |
460 | typedef typename elfcpp::Swap<valsize, big_endian>::Valtype Valtype; | |
461 | Valtype* wv = reinterpret_cast<Valtype*>(view); | |
462 | Valtype val = elfcpp::Swap<valsize, big_endian>::readval(wv); | |
463 | Valtype reloc = (psymval->value(object, addend) >> right_shift); | |
464 | ||
465 | val &= ~dst_mask; | |
466 | reloc &= dst_mask; | |
467 | ||
468 | elfcpp::Swap<valsize, big_endian>::writeval(wv, val | reloc); | |
469 | } | |
470 | ||
471 | // Do a simple relocation using a symbol value with the addend in | |
472 | // the relocation, unaligned. | |
473 | template<int valsize> | |
474 | static inline void | |
475 | rela_ua(unsigned char* view, unsigned int right_shift, | |
476 | elfcpp::Elf_Xword dst_mask, | |
477 | const Sized_relobj<size, big_endian>* object, | |
478 | const Symbol_value<size>* psymval, | |
479 | typename elfcpp::Swap<size, big_endian>::Valtype addend) | |
480 | { | |
481 | typedef typename elfcpp::Swap_unaligned<valsize, | |
482 | big_endian>::Valtype Valtype; | |
483 | unsigned char* wv = view; | |
484 | Valtype val = elfcpp::Swap_unaligned<valsize, big_endian>::readval(wv); | |
485 | Valtype reloc = (psymval->value(object, addend) >> right_shift); | |
486 | ||
487 | val &= ~dst_mask; | |
488 | reloc &= dst_mask; | |
489 | ||
490 | elfcpp::Swap_unaligned<valsize, big_endian>::writeval(wv, val | reloc); | |
491 | } | |
492 | ||
493 | // Do a simple PC relative relocation with a Symbol_value with the | |
494 | // addend in the relocation. | |
495 | template<int valsize> | |
496 | static inline void | |
497 | pcrela(unsigned char* view, unsigned int right_shift, | |
498 | elfcpp::Elf_Xword dst_mask, | |
499 | const Sized_relobj<size, big_endian>* object, | |
500 | const Symbol_value<size>* psymval, | |
501 | typename elfcpp::Swap<size, big_endian>::Valtype addend, | |
502 | typename elfcpp::Elf_types<size>::Elf_Addr address) | |
503 | { | |
504 | typedef typename elfcpp::Swap<valsize, big_endian>::Valtype Valtype; | |
505 | Valtype* wv = reinterpret_cast<Valtype*>(view); | |
506 | Valtype val = elfcpp::Swap<valsize, big_endian>::readval(wv); | |
507 | Valtype reloc = ((psymval->value(object, addend) - address) | |
508 | >> right_shift); | |
509 | ||
510 | val &= ~dst_mask; | |
511 | reloc &= dst_mask; | |
512 | ||
513 | elfcpp::Swap<valsize, big_endian>::writeval(wv, val | reloc); | |
514 | } | |
515 | ||
516 | template<int valsize> | |
517 | static inline void | |
518 | pcrela_unaligned(unsigned char* view, | |
519 | const Sized_relobj<size, big_endian>* object, | |
520 | const Symbol_value<size>* psymval, | |
521 | typename elfcpp::Swap<size, big_endian>::Valtype addend, | |
522 | typename elfcpp::Elf_types<size>::Elf_Addr address) | |
523 | { | |
524 | typedef typename elfcpp::Swap_unaligned<valsize, | |
525 | big_endian>::Valtype Valtype; | |
526 | unsigned char* wv = view; | |
527 | Valtype reloc = (psymval->value(object, addend) - address); | |
528 | ||
529 | elfcpp::Swap_unaligned<valsize, big_endian>::writeval(wv, reloc); | |
530 | } | |
531 | ||
532 | typedef Powerpc_relocate_functions<size, big_endian> This; | |
533 | typedef Relocate_functions<size, big_endian> This_reloc; | |
534 | public: | |
535 | // R_POWERPC_REL32: (Symbol + Addend - Address) | |
536 | static inline void | |
537 | rel32(unsigned char* view, | |
538 | const Sized_relobj<size, big_endian>* object, | |
539 | const Symbol_value<size>* psymval, | |
540 | typename elfcpp::Elf_types<size>::Elf_Addr addend, | |
541 | typename elfcpp::Elf_types<size>::Elf_Addr address) | |
542 | { This_reloc::pcrela32(view, object, psymval, addend, address); } | |
543 | ||
544 | // R_POWERPC_REL24: (Symbol + Addend - Address) & 0x3fffffc | |
545 | static inline void | |
546 | rel24(unsigned char* view, | |
547 | const Sized_relobj<size, big_endian>* object, | |
548 | const Symbol_value<size>* psymval, | |
549 | typename elfcpp::Elf_types<size>::Elf_Addr addend, | |
550 | typename elfcpp::Elf_types<size>::Elf_Addr address) | |
551 | { | |
552 | This::template pcrela<32>(view, 0, 0x03fffffc, object, | |
553 | psymval, addend, address); | |
554 | } | |
555 | ||
556 | // R_POWERPC_REL14: (Symbol + Addend - Address) & 0xfffc | |
557 | static inline void | |
558 | rel14(unsigned char* view, | |
559 | const Sized_relobj<size, big_endian>* object, | |
560 | const Symbol_value<size>* psymval, | |
561 | typename elfcpp::Elf_types<size>::Elf_Addr addend, | |
562 | typename elfcpp::Elf_types<size>::Elf_Addr address) | |
563 | { | |
564 | This::template pcrela<32>(view, 0, 0x0000fffc, object, | |
565 | psymval, addend, address); | |
566 | } | |
567 | ||
568 | // R_POWERPC_ADDR16: (Symbol + Addend) & 0xffff | |
569 | static inline void | |
570 | addr16(unsigned char* view, | |
571 | typename elfcpp::Elf_types<size>::Elf_Addr value, | |
572 | typename elfcpp::Elf_types<size>::Elf_Addr addend) | |
573 | { This_reloc::rela16(view, value, addend); } | |
574 | ||
575 | static inline void | |
576 | addr16(unsigned char* view, | |
577 | const Sized_relobj<size, big_endian>* object, | |
578 | const Symbol_value<size>* psymval, | |
579 | typename elfcpp::Elf_types<size>::Elf_Addr addend) | |
580 | { This_reloc::rela16(view, object, psymval, addend); } | |
581 | ||
582 | // R_POWERPC_ADDR16_DS: (Symbol + Addend) & 0xfffc | |
583 | static inline void | |
584 | addr16_ds(unsigned char* view, | |
585 | typename elfcpp::Elf_types<size>::Elf_Addr value, | |
586 | typename elfcpp::Elf_types<size>::Elf_Addr addend) | |
587 | { | |
588 | This::template rela<16>(view, 0, 0xfffc, value, addend); | |
589 | } | |
590 | ||
591 | // R_POWERPC_ADDR16_LO: (Symbol + Addend) & 0xffff | |
592 | static inline void | |
593 | addr16_lo(unsigned char* view, | |
594 | typename elfcpp::Elf_types<size>::Elf_Addr value, | |
595 | typename elfcpp::Elf_types<size>::Elf_Addr addend) | |
596 | { This_reloc::rela16(view, value, addend); } | |
597 | ||
598 | static inline void | |
599 | addr16_lo(unsigned char* view, | |
600 | const Sized_relobj<size, big_endian>* object, | |
601 | const Symbol_value<size>* psymval, | |
602 | typename elfcpp::Elf_types<size>::Elf_Addr addend) | |
603 | { This_reloc::rela16(view, object, psymval, addend); } | |
604 | ||
605 | // R_POWERPC_ADDR16_HI: ((Symbol + Addend) >> 16) & 0xffff | |
606 | static inline void | |
607 | addr16_hi(unsigned char* view, | |
608 | typename elfcpp::Elf_types<size>::Elf_Addr value, | |
609 | typename elfcpp::Elf_types<size>::Elf_Addr addend) | |
610 | { | |
611 | This::template rela<16>(view, 16, 0xffff, value, addend); | |
612 | } | |
613 | ||
614 | static inline void | |
615 | addr16_hi(unsigned char* view, | |
616 | const Sized_relobj<size, big_endian>* object, | |
617 | const Symbol_value<size>* psymval, | |
618 | typename elfcpp::Elf_types<size>::Elf_Addr addend) | |
619 | { | |
620 | This::template rela<16>(view, 16, 0xffff, object, psymval, addend); | |
621 | } | |
622 | ||
623 | // R_POWERPC_ADDR16_HA: Same as R_POWERPC_ADDR16_HI except that if the | |
624 | // final value of the low 16 bits of the | |
625 | // relocation is negative, add one. | |
626 | static inline void | |
627 | addr16_ha(unsigned char* view, | |
628 | typename elfcpp::Elf_types<size>::Elf_Addr value, | |
629 | typename elfcpp::Elf_types<size>::Elf_Addr addend) | |
630 | { | |
42cacb20 DE |
631 | typename elfcpp::Elf_types<size>::Elf_Addr reloc; |
632 | ||
633 | reloc = value + addend; | |
634 | ||
635 | if (reloc & 0x8000) | |
636 | reloc += 0x10000; | |
637 | reloc >>= 16; | |
638 | ||
e6fde208 | 639 | elfcpp::Swap<16, big_endian>::writeval(view, reloc); |
42cacb20 DE |
640 | } |
641 | ||
642 | static inline void | |
643 | addr16_ha(unsigned char* view, | |
644 | const Sized_relobj<size, big_endian>* object, | |
645 | const Symbol_value<size>* psymval, | |
646 | typename elfcpp::Elf_types<size>::Elf_Addr addend) | |
647 | { | |
42cacb20 DE |
648 | typename elfcpp::Elf_types<size>::Elf_Addr reloc; |
649 | ||
650 | reloc = psymval->value(object, addend); | |
651 | ||
652 | if (reloc & 0x8000) | |
653 | reloc += 0x10000; | |
654 | reloc >>= 16; | |
655 | ||
e6fde208 | 656 | elfcpp::Swap<16, big_endian>::writeval(view, reloc); |
42cacb20 DE |
657 | } |
658 | ||
659 | // R_PPC_REL16: (Symbol + Addend - Address) & 0xffff | |
660 | static inline void | |
661 | rel16(unsigned char* view, | |
662 | const Sized_relobj<size, big_endian>* object, | |
663 | const Symbol_value<size>* psymval, | |
664 | typename elfcpp::Elf_types<size>::Elf_Addr addend, | |
665 | typename elfcpp::Elf_types<size>::Elf_Addr address) | |
666 | { This_reloc::pcrela16(view, object, psymval, addend, address); } | |
667 | ||
668 | // R_PPC_REL16_LO: (Symbol + Addend - Address) & 0xffff | |
669 | static inline void | |
670 | rel16_lo(unsigned char* view, | |
671 | const Sized_relobj<size, big_endian>* object, | |
672 | const Symbol_value<size>* psymval, | |
673 | typename elfcpp::Elf_types<size>::Elf_Addr addend, | |
674 | typename elfcpp::Elf_types<size>::Elf_Addr address) | |
675 | { This_reloc::pcrela16(view, object, psymval, addend, address); } | |
676 | ||
677 | // R_PPC_REL16_HI: ((Symbol + Addend - Address) >> 16) & 0xffff | |
678 | static inline void | |
679 | rel16_hi(unsigned char* view, | |
680 | const Sized_relobj<size, big_endian>* object, | |
681 | const Symbol_value<size>* psymval, | |
682 | typename elfcpp::Elf_types<size>::Elf_Addr addend, | |
683 | typename elfcpp::Elf_types<size>::Elf_Addr address) | |
684 | { | |
685 | This::template pcrela<16>(view, 16, 0xffff, object, | |
686 | psymval, addend, address); | |
687 | } | |
688 | ||
689 | // R_PPC_REL16_HA: Same as R_PPC_REL16_HI except that if the | |
690 | // final value of the low 16 bits of the | |
691 | // relocation is negative, add one. | |
692 | static inline void | |
693 | rel16_ha(unsigned char* view, | |
694 | const Sized_relobj<size, big_endian>* object, | |
695 | const Symbol_value<size>* psymval, | |
696 | typename elfcpp::Elf_types<size>::Elf_Addr addend, | |
697 | typename elfcpp::Elf_types<size>::Elf_Addr address) | |
698 | { | |
42cacb20 DE |
699 | typename elfcpp::Elf_types<size>::Elf_Addr reloc; |
700 | ||
701 | reloc = (psymval->value(object, addend) - address); | |
702 | if (reloc & 0x8000) | |
703 | reloc += 0x10000; | |
704 | reloc >>= 16; | |
705 | ||
83d22aa8 | 706 | elfcpp::Swap<16, big_endian>::writeval(view, reloc); |
42cacb20 DE |
707 | } |
708 | }; | |
709 | ||
710 | // Get the GOT section, creating it if necessary. | |
711 | ||
712 | template<int size, bool big_endian> | |
713 | Output_data_got<size, big_endian>* | |
714 | Target_powerpc<size, big_endian>::got_section(Symbol_table* symtab, | |
715 | Layout* layout) | |
716 | { | |
717 | if (this->got_ == NULL) | |
718 | { | |
719 | gold_assert(symtab != NULL && layout != NULL); | |
720 | ||
721 | this->got_ = new Output_data_got<size, big_endian>(); | |
722 | ||
723 | layout->add_output_section_data(".got", elfcpp::SHT_PROGBITS, | |
724 | elfcpp::SHF_ALLOC | elfcpp::SHF_WRITE, | |
725 | this->got_); | |
726 | ||
727 | // Create the GOT2 or TOC in the .got section. | |
728 | if (size == 32) | |
729 | { | |
730 | this->got2_ = new Output_data_space(4, "** GOT2"); | |
731 | layout->add_output_section_data(".got2", elfcpp::SHT_PROGBITS, | |
732 | elfcpp::SHF_ALLOC | |
733 | | elfcpp::SHF_WRITE, | |
734 | this->got2_); | |
735 | } | |
736 | else | |
737 | { | |
738 | this->toc_ = new Output_data_space(8, "** TOC"); | |
739 | layout->add_output_section_data(".toc", elfcpp::SHT_PROGBITS, | |
740 | elfcpp::SHF_ALLOC | |
741 | | elfcpp::SHF_WRITE, | |
742 | this->toc_); | |
743 | } | |
744 | ||
745 | // Define _GLOBAL_OFFSET_TABLE_ at the start of the .got section. | |
746 | symtab->define_in_output_data("_GLOBAL_OFFSET_TABLE_", NULL, | |
747 | this->got_, | |
748 | 0, 0, elfcpp::STT_OBJECT, | |
749 | elfcpp::STB_LOCAL, | |
750 | elfcpp::STV_HIDDEN, 0, | |
751 | false, false); | |
752 | } | |
753 | ||
754 | return this->got_; | |
755 | } | |
756 | ||
757 | // Get the dynamic reloc section, creating it if necessary. | |
758 | ||
759 | template<int size, bool big_endian> | |
760 | typename Target_powerpc<size, big_endian>::Reloc_section* | |
761 | Target_powerpc<size, big_endian>::rela_dyn_section(Layout* layout) | |
762 | { | |
763 | if (this->rela_dyn_ == NULL) | |
764 | { | |
765 | gold_assert(layout != NULL); | |
766 | this->rela_dyn_ = new Reloc_section(parameters->options().combreloc()); | |
767 | layout->add_output_section_data(".rela.dyn", elfcpp::SHT_RELA, | |
768 | elfcpp::SHF_ALLOC, this->rela_dyn_); | |
769 | } | |
770 | return this->rela_dyn_; | |
771 | } | |
772 | ||
773 | // A class to handle the PLT data. | |
774 | ||
775 | template<int size, bool big_endian> | |
776 | class Output_data_plt_powerpc : public Output_section_data | |
777 | { | |
778 | public: | |
779 | typedef Output_data_reloc<elfcpp::SHT_RELA, true, | |
780 | size, big_endian> Reloc_section; | |
781 | ||
782 | Output_data_plt_powerpc(Layout*); | |
783 | ||
784 | // Add an entry to the PLT. | |
785 | void add_entry(Symbol* gsym); | |
786 | ||
787 | // Return the .rela.plt section data. | |
788 | const Reloc_section* rel_plt() const | |
789 | { | |
790 | return this->rel_; | |
791 | } | |
792 | ||
793 | protected: | |
794 | void do_adjust_output_section(Output_section* os); | |
795 | ||
796 | private: | |
797 | // The size of an entry in the PLT. | |
798 | static const int base_plt_entry_size = (size == 32 ? 16 : 24); | |
799 | ||
800 | // Set the final size. | |
801 | void | |
802 | set_final_data_size() | |
803 | { | |
804 | unsigned int full_count = this->count_ + 4; | |
805 | ||
806 | this->set_data_size(full_count * base_plt_entry_size); | |
807 | } | |
808 | ||
809 | // Write out the PLT data. | |
810 | void | |
811 | do_write(Output_file*); | |
812 | ||
813 | // The reloc section. | |
814 | Reloc_section* rel_; | |
815 | // The number of PLT entries. | |
816 | unsigned int count_; | |
817 | }; | |
818 | ||
819 | // Create the PLT section. The ordinary .got section is an argument, | |
820 | // since we need to refer to the start. | |
821 | ||
822 | template<int size, bool big_endian> | |
823 | Output_data_plt_powerpc<size, big_endian>::Output_data_plt_powerpc(Layout* layout) | |
824 | : Output_section_data(size == 32 ? 4 : 8), count_(0) | |
825 | { | |
826 | this->rel_ = new Reloc_section(false); | |
827 | layout->add_output_section_data(".rela.plt", elfcpp::SHT_RELA, | |
828 | elfcpp::SHF_ALLOC, this->rel_); | |
829 | } | |
830 | ||
831 | template<int size, bool big_endian> | |
832 | void | |
833 | Output_data_plt_powerpc<size, big_endian>::do_adjust_output_section(Output_section* os) | |
834 | { | |
835 | os->set_entsize(0); | |
836 | } | |
837 | ||
838 | // Add an entry to the PLT. | |
839 | ||
840 | template<int size, bool big_endian> | |
841 | void | |
842 | Output_data_plt_powerpc<size, big_endian>::add_entry(Symbol* gsym) | |
843 | { | |
844 | gold_assert(!gsym->has_plt_offset()); | |
845 | unsigned int index = this->count_+ + 4; | |
846 | section_offset_type plt_offset; | |
847 | ||
848 | if (index < 8192) | |
849 | plt_offset = index * base_plt_entry_size; | |
850 | else | |
851 | gold_unreachable(); | |
852 | ||
853 | gsym->set_plt_offset(plt_offset); | |
854 | ||
855 | ++this->count_; | |
856 | ||
857 | gsym->set_needs_dynsym_entry(); | |
858 | this->rel_->add_global(gsym, elfcpp::R_POWERPC_JMP_SLOT, this, | |
859 | plt_offset, 0); | |
860 | } | |
861 | ||
862 | static const unsigned int addis_11_11 = 0x3d6b0000; | |
863 | static const unsigned int addis_11_30 = 0x3d7e0000; | |
864 | static const unsigned int addis_12_12 = 0x3d8c0000; | |
865 | static const unsigned int addi_11_11 = 0x396b0000; | |
866 | static const unsigned int add_0_11_11 = 0x7c0b5a14; | |
867 | static const unsigned int add_11_0_11 = 0x7d605a14; | |
868 | static const unsigned int b = 0x48000000; | |
869 | static const unsigned int bcl_20_31 = 0x429f0005; | |
870 | static const unsigned int bctr = 0x4e800420; | |
871 | static const unsigned int lis_11 = 0x3d600000; | |
872 | static const unsigned int lis_12 = 0x3d800000; | |
873 | static const unsigned int lwzu_0_12 = 0x840c0000; | |
874 | static const unsigned int lwz_0_12 = 0x800c0000; | |
875 | static const unsigned int lwz_11_11 = 0x816b0000; | |
876 | static const unsigned int lwz_11_30 = 0x817e0000; | |
877 | static const unsigned int lwz_12_12 = 0x818c0000; | |
878 | static const unsigned int mflr_0 = 0x7c0802a6; | |
879 | static const unsigned int mflr_12 = 0x7d8802a6; | |
880 | static const unsigned int mtctr_0 = 0x7c0903a6; | |
881 | static const unsigned int mtctr_11 = 0x7d6903a6; | |
882 | static const unsigned int mtlr_0 = 0x7c0803a6; | |
883 | static const unsigned int nop = 0x60000000; | |
884 | static const unsigned int sub_11_11_12 = 0x7d6c5850; | |
885 | ||
886 | static const unsigned int addis_r12_r2 = 0x3d820000; /* addis %r12,%r2,xxx@ha */ | |
887 | static const unsigned int std_r2_40r1 = 0xf8410028; /* std %r2,40(%r1) */ | |
888 | static const unsigned int ld_r11_0r12 = 0xe96c0000; /* ld %r11,xxx+0@l(%r12) */ | |
889 | static const unsigned int ld_r2_0r12 = 0xe84c0000; /* ld %r2,xxx+8@l(%r12) */ | |
890 | /* ld %r11,xxx+16@l(%r12) */ | |
891 | ||
892 | ||
893 | // Write out the PLT. | |
894 | ||
895 | template<int size, bool big_endian> | |
896 | void | |
897 | Output_data_plt_powerpc<size, big_endian>::do_write(Output_file* of) | |
898 | { | |
899 | const off_t offset = this->offset(); | |
900 | const section_size_type oview_size = | |
901 | convert_to_section_size_type(this->data_size()); | |
902 | unsigned char* const oview = of->get_output_view(offset, oview_size); | |
903 | unsigned char* pov = oview; | |
904 | ||
905 | memset(pov, 0, base_plt_entry_size * 4); | |
906 | pov += base_plt_entry_size * 4; | |
907 | ||
908 | unsigned int plt_offset = base_plt_entry_size * 4; | |
909 | const unsigned int count = this->count_; | |
910 | ||
911 | if (size == 64) | |
912 | { | |
913 | for (unsigned int i = 0; i < count; i++) | |
914 | { | |
915 | } | |
916 | } | |
917 | else | |
918 | { | |
919 | for (unsigned int i = 0; i < count; i++) | |
920 | { | |
921 | elfcpp::Swap<32, true>::writeval(pov + 0x00, | |
922 | lwz_11_30 + plt_offset); | |
923 | elfcpp::Swap<32, true>::writeval(pov + 0x04, mtctr_11); | |
924 | elfcpp::Swap<32, true>::writeval(pov + 0x08, bctr); | |
ce3ac18a | 925 | elfcpp::Swap<32, true>::writeval(pov + 0x0c, nop); |
42cacb20 DE |
926 | pov += base_plt_entry_size; |
927 | plt_offset += base_plt_entry_size; | |
928 | } | |
929 | } | |
930 | ||
931 | gold_assert(static_cast<section_size_type>(pov - oview) == oview_size); | |
932 | ||
933 | of->write_output_view(offset, oview_size, oview); | |
934 | } | |
935 | ||
936 | // Create a PLT entry for a global symbol. | |
937 | ||
938 | template<int size, bool big_endian> | |
939 | void | |
940 | Target_powerpc<size, big_endian>::make_plt_entry(Symbol_table* symtab, | |
941 | Layout* layout, | |
942 | Symbol* gsym) | |
943 | { | |
944 | if (gsym->has_plt_offset()) | |
945 | return; | |
946 | ||
947 | if (this->plt_ == NULL) | |
948 | { | |
949 | // Create the GOT section first. | |
950 | this->got_section(symtab, layout); | |
951 | ||
952 | this->plt_ = new Output_data_plt_powerpc<size, big_endian>(layout); | |
953 | layout->add_output_section_data(".plt", elfcpp::SHT_PROGBITS, | |
954 | (elfcpp::SHF_ALLOC | |
955 | | elfcpp::SHF_EXECINSTR | |
956 | | elfcpp::SHF_WRITE), | |
957 | this->plt_); | |
958 | ||
959 | // Define _PROCEDURE_LINKAGE_TABLE_ at the start of the .plt section. | |
960 | symtab->define_in_output_data("_PROCEDURE_LINKAGE_TABLE_", NULL, | |
961 | this->plt_, | |
962 | 0, 0, elfcpp::STT_OBJECT, | |
963 | elfcpp::STB_LOCAL, | |
964 | elfcpp::STV_HIDDEN, 0, | |
965 | false, false); | |
966 | } | |
967 | ||
968 | this->plt_->add_entry(gsym); | |
969 | } | |
970 | ||
971 | // Create a GOT entry for the TLS module index. | |
972 | ||
973 | template<int size, bool big_endian> | |
974 | unsigned int | |
975 | Target_powerpc<size, big_endian>::got_mod_index_entry(Symbol_table* symtab, | |
976 | Layout* layout, | |
977 | Sized_relobj<size, big_endian>* object) | |
978 | { | |
979 | if (this->got_mod_index_offset_ == -1U) | |
980 | { | |
981 | gold_assert(symtab != NULL && layout != NULL && object != NULL); | |
982 | Reloc_section* rela_dyn = this->rela_dyn_section(layout); | |
983 | Output_data_got<size, big_endian>* got; | |
984 | unsigned int got_offset; | |
985 | ||
986 | got = this->got_section(symtab, layout); | |
987 | got_offset = got->add_constant(0); | |
988 | rela_dyn->add_local(object, 0, elfcpp::R_POWERPC_DTPMOD, got, | |
989 | got_offset, 0); | |
990 | got->add_constant(0); | |
991 | this->got_mod_index_offset_ = got_offset; | |
992 | } | |
993 | return this->got_mod_index_offset_; | |
994 | } | |
995 | ||
996 | // Optimize the TLS relocation type based on what we know about the | |
997 | // symbol. IS_FINAL is true if the final address of this symbol is | |
998 | // known at link time. | |
999 | ||
1000 | static tls::Tls_optimization | |
1001 | optimize_tls_reloc(bool /* is_final */, int r_type) | |
1002 | { | |
1003 | // If we are generating a shared library, then we can't do anything | |
1004 | // in the linker. | |
1005 | if (parameters->options().shared()) | |
1006 | return tls::TLSOPT_NONE; | |
1007 | switch (r_type) | |
1008 | { | |
1009 | // XXX | |
1010 | default: | |
1011 | gold_unreachable(); | |
1012 | } | |
1013 | } | |
1014 | ||
1015 | // Report an unsupported relocation against a local symbol. | |
1016 | ||
1017 | template<int size, bool big_endian> | |
1018 | void | |
1019 | Target_powerpc<size, big_endian>::Scan::unsupported_reloc_local( | |
1020 | Sized_relobj<size, big_endian>* object, | |
1021 | unsigned int r_type) | |
1022 | { | |
1023 | gold_error(_("%s: unsupported reloc %u against local symbol"), | |
1024 | object->name().c_str(), r_type); | |
1025 | } | |
1026 | ||
1027 | // We are about to emit a dynamic relocation of type R_TYPE. If the | |
1028 | // dynamic linker does not support it, issue an error. | |
1029 | ||
1030 | template<int size, bool big_endian> | |
1031 | void | |
1032 | Target_powerpc<size, big_endian>::Scan::check_non_pic(Relobj* object, | |
1033 | unsigned int r_type) | |
1034 | { | |
1035 | gold_assert(r_type != elfcpp::R_POWERPC_NONE); | |
1036 | ||
1037 | // These are the relocation types supported by glibc for both 32-bit | |
1038 | // and 64-bit powerpc. | |
1039 | switch (r_type) | |
1040 | { | |
1041 | case elfcpp::R_POWERPC_RELATIVE: | |
1042 | case elfcpp::R_POWERPC_GLOB_DAT: | |
1043 | case elfcpp::R_POWERPC_DTPMOD: | |
1044 | case elfcpp::R_POWERPC_DTPREL: | |
1045 | case elfcpp::R_POWERPC_TPREL: | |
1046 | case elfcpp::R_POWERPC_JMP_SLOT: | |
1047 | case elfcpp::R_POWERPC_COPY: | |
1048 | case elfcpp::R_POWERPC_ADDR32: | |
1049 | case elfcpp::R_POWERPC_ADDR24: | |
1050 | case elfcpp::R_POWERPC_REL24: | |
1051 | return; | |
1052 | ||
1053 | default: | |
1054 | break; | |
1055 | } | |
1056 | ||
1057 | if (size == 64) | |
1058 | { | |
1059 | switch (r_type) | |
1060 | { | |
1061 | // These are the relocation types supported only on 64-bit. | |
1062 | case elfcpp::R_PPC64_ADDR64: | |
1063 | case elfcpp::R_PPC64_TPREL16_LO_DS: | |
1064 | case elfcpp::R_PPC64_TPREL16_DS: | |
1065 | case elfcpp::R_POWERPC_TPREL16: | |
1066 | case elfcpp::R_POWERPC_TPREL16_LO: | |
1067 | case elfcpp::R_POWERPC_TPREL16_HI: | |
1068 | case elfcpp::R_POWERPC_TPREL16_HA: | |
1069 | case elfcpp::R_PPC64_TPREL16_HIGHER: | |
1070 | case elfcpp::R_PPC64_TPREL16_HIGHEST: | |
1071 | case elfcpp::R_PPC64_TPREL16_HIGHERA: | |
1072 | case elfcpp::R_PPC64_TPREL16_HIGHESTA: | |
1073 | case elfcpp::R_PPC64_ADDR16_LO_DS: | |
1074 | case elfcpp::R_POWERPC_ADDR16_LO: | |
1075 | case elfcpp::R_POWERPC_ADDR16_HI: | |
1076 | case elfcpp::R_POWERPC_ADDR16_HA: | |
1077 | case elfcpp::R_POWERPC_ADDR30: | |
1078 | case elfcpp::R_PPC64_UADDR64: | |
1079 | case elfcpp::R_POWERPC_UADDR32: | |
1080 | case elfcpp::R_POWERPC_ADDR16: | |
1081 | case elfcpp::R_POWERPC_UADDR16: | |
1082 | case elfcpp::R_PPC64_ADDR16_DS: | |
1083 | case elfcpp::R_PPC64_ADDR16_HIGHER: | |
1084 | case elfcpp::R_PPC64_ADDR16_HIGHEST: | |
1085 | case elfcpp::R_PPC64_ADDR16_HIGHERA: | |
1086 | case elfcpp::R_PPC64_ADDR16_HIGHESTA: | |
1087 | case elfcpp::R_POWERPC_ADDR14_BRTAKEN: | |
1088 | case elfcpp::R_POWERPC_ADDR14_BRNTAKEN: | |
1089 | case elfcpp::R_POWERPC_REL32: | |
1090 | case elfcpp::R_PPC64_REL64: | |
1091 | return; | |
1092 | ||
1093 | default: | |
1094 | break; | |
1095 | } | |
1096 | } | |
1097 | else | |
1098 | { | |
1099 | switch (r_type) | |
1100 | { | |
1101 | // These are the relocation types supported only on 32-bit. | |
1102 | ||
1103 | default: | |
1104 | break; | |
1105 | } | |
1106 | } | |
1107 | ||
1108 | // This prevents us from issuing more than one error per reloc | |
1109 | // section. But we can still wind up issuing more than one | |
1110 | // error per object file. | |
1111 | if (this->issued_non_pic_error_) | |
1112 | return; | |
33aea2fd | 1113 | gold_assert(parameters->options().output_is_position_independent()); |
42cacb20 DE |
1114 | object->error(_("requires unsupported dynamic reloc; " |
1115 | "recompile with -fPIC")); | |
1116 | this->issued_non_pic_error_ = true; | |
1117 | return; | |
1118 | } | |
1119 | ||
1120 | // Scan a relocation for a local symbol. | |
1121 | ||
1122 | template<int size, bool big_endian> | |
1123 | inline void | |
1124 | Target_powerpc<size, big_endian>::Scan::local( | |
1125 | const General_options&, | |
1126 | Symbol_table* symtab, | |
1127 | Layout* layout, | |
1128 | Target_powerpc<size, big_endian>* target, | |
1129 | Sized_relobj<size, big_endian>* object, | |
1130 | unsigned int data_shndx, | |
1131 | Output_section* output_section, | |
1132 | const elfcpp::Rela<size, big_endian>& reloc, | |
1133 | unsigned int r_type, | |
1134 | const elfcpp::Sym<size, big_endian>& lsym) | |
1135 | { | |
1136 | switch (r_type) | |
1137 | { | |
1138 | case elfcpp::R_POWERPC_NONE: | |
1139 | case elfcpp::R_POWERPC_GNU_VTINHERIT: | |
1140 | case elfcpp::R_POWERPC_GNU_VTENTRY: | |
1141 | break; | |
1142 | ||
1143 | case elfcpp::R_PPC64_ADDR64: | |
1144 | case elfcpp::R_POWERPC_ADDR32: | |
1145 | case elfcpp::R_POWERPC_ADDR16_HA: | |
1146 | case elfcpp::R_POWERPC_ADDR16_LO: | |
1147 | // If building a shared library (or a position-independent | |
1148 | // executable), we need to create a dynamic relocation for | |
1149 | // this location. | |
1150 | if (parameters->options().output_is_position_independent()) | |
1151 | { | |
1152 | Reloc_section* rela_dyn = target->rela_dyn_section(layout); | |
1153 | ||
1154 | check_non_pic(object, r_type); | |
1155 | if (lsym.get_st_type() != elfcpp::STT_SECTION) | |
1156 | { | |
1157 | unsigned int r_sym = elfcpp::elf_r_sym<size>(reloc.get_r_info()); | |
1158 | rela_dyn->add_local(object, r_sym, r_type, output_section, | |
1159 | data_shndx, reloc.get_r_offset(), | |
1160 | reloc.get_r_addend()); | |
1161 | } | |
1162 | else | |
1163 | { | |
1164 | unsigned int r_sym = elfcpp::elf_r_sym<size>(reloc.get_r_info()); | |
1165 | gold_assert(lsym.get_st_value() == 0); | |
1166 | rela_dyn->add_local_relative(object, r_sym, r_type, | |
1167 | output_section, data_shndx, | |
1168 | reloc.get_r_offset(), | |
1169 | reloc.get_r_addend()); | |
1170 | } | |
1171 | } | |
1172 | break; | |
1173 | ||
1174 | case elfcpp::R_POWERPC_REL24: | |
1175 | case elfcpp::R_PPC_LOCAL24PC: | |
1176 | case elfcpp::R_POWERPC_REL32: | |
1177 | case elfcpp::R_PPC_REL16_LO: | |
1178 | case elfcpp::R_PPC_REL16_HA: | |
1179 | break; | |
1180 | ||
1181 | case elfcpp::R_POWERPC_GOT16: | |
1182 | case elfcpp::R_POWERPC_GOT16_LO: | |
1183 | case elfcpp::R_POWERPC_GOT16_HI: | |
1184 | case elfcpp::R_POWERPC_GOT16_HA: | |
1185 | case elfcpp::R_PPC64_TOC16: | |
1186 | case elfcpp::R_PPC64_TOC16_LO: | |
1187 | case elfcpp::R_PPC64_TOC16_HI: | |
1188 | case elfcpp::R_PPC64_TOC16_HA: | |
1189 | case elfcpp::R_PPC64_TOC16_DS: | |
1190 | case elfcpp::R_PPC64_TOC16_LO_DS: | |
1191 | { | |
1192 | // The symbol requires a GOT entry. | |
1193 | Output_data_got<size, big_endian>* got; | |
1194 | unsigned int r_sym; | |
1195 | ||
1196 | got = target->got_section(symtab, layout); | |
1197 | r_sym = elfcpp::elf_r_sym<size>(reloc.get_r_info()); | |
1198 | ||
1199 | // If we are generating a shared object, we need to add a | |
1200 | // dynamic relocation for this symbol's GOT entry. | |
1201 | if (parameters->options().output_is_position_independent()) | |
1202 | { | |
1203 | if (!object->local_has_got_offset(r_sym, GOT_TYPE_STANDARD)) | |
1204 | { | |
1205 | Reloc_section* rela_dyn = target->rela_dyn_section(layout); | |
1206 | unsigned int off; | |
1207 | ||
1208 | off = got->add_constant(0); | |
1209 | object->set_local_got_offset(r_sym, GOT_TYPE_STANDARD, off); | |
1210 | rela_dyn->add_local_relative(object, r_sym, | |
1211 | elfcpp::R_POWERPC_RELATIVE, | |
1212 | got, off, 0); | |
1213 | } | |
1214 | } | |
1215 | else | |
1216 | got->add_local(object, r_sym, GOT_TYPE_STANDARD); | |
1217 | } | |
1218 | break; | |
1219 | ||
1220 | case elfcpp::R_PPC64_TOC: | |
1221 | // We need a GOT section. | |
1222 | target->got_section(symtab, layout); | |
1223 | break; | |
1224 | ||
1225 | // These are relocations which should only be seen by the | |
1226 | // dynamic linker, and should never be seen here. | |
1227 | case elfcpp::R_POWERPC_COPY: | |
1228 | case elfcpp::R_POWERPC_GLOB_DAT: | |
1229 | case elfcpp::R_POWERPC_JMP_SLOT: | |
1230 | case elfcpp::R_POWERPC_RELATIVE: | |
1231 | case elfcpp::R_POWERPC_DTPMOD: | |
1232 | gold_error(_("%s: unexpected reloc %u in object file"), | |
1233 | object->name().c_str(), r_type); | |
1234 | break; | |
1235 | ||
1236 | default: | |
1237 | unsupported_reloc_local(object, r_type); | |
1238 | break; | |
1239 | } | |
1240 | } | |
1241 | ||
1242 | // Report an unsupported relocation against a global symbol. | |
1243 | ||
1244 | template<int size, bool big_endian> | |
1245 | void | |
1246 | Target_powerpc<size, big_endian>::Scan::unsupported_reloc_global( | |
1247 | Sized_relobj<size, big_endian>* object, | |
1248 | unsigned int r_type, | |
1249 | Symbol* gsym) | |
1250 | { | |
1251 | gold_error(_("%s: unsupported reloc %u against global symbol %s"), | |
1252 | object->name().c_str(), r_type, gsym->demangled_name().c_str()); | |
1253 | } | |
1254 | ||
1255 | // Scan a relocation for a global symbol. | |
1256 | ||
1257 | template<int size, bool big_endian> | |
1258 | inline void | |
1259 | Target_powerpc<size, big_endian>::Scan::global( | |
1260 | const General_options&, | |
1261 | Symbol_table* symtab, | |
1262 | Layout* layout, | |
1263 | Target_powerpc<size, big_endian>* target, | |
1264 | Sized_relobj<size, big_endian>* object, | |
1265 | unsigned int data_shndx, | |
1266 | Output_section* output_section, | |
1267 | const elfcpp::Rela<size, big_endian>& reloc, | |
1268 | unsigned int r_type, | |
1269 | Symbol* gsym) | |
1270 | { | |
1271 | switch (r_type) | |
1272 | { | |
1273 | case elfcpp::R_POWERPC_NONE: | |
1274 | case elfcpp::R_POWERPC_GNU_VTINHERIT: | |
1275 | case elfcpp::R_POWERPC_GNU_VTENTRY: | |
1276 | break; | |
1277 | ||
1278 | case elfcpp::R_PPC_PLTREL24: | |
1279 | // If the symbol is fully resolved, this is just a PC32 reloc. | |
1280 | // Otherwise we need a PLT entry. | |
1281 | if (gsym->final_value_is_known()) | |
1282 | break; | |
1283 | // If building a shared library, we can also skip the PLT entry | |
1284 | // if the symbol is defined in the output file and is protected | |
1285 | // or hidden. | |
1286 | if (gsym->is_defined() | |
1287 | && !gsym->is_from_dynobj() | |
1288 | && !gsym->is_preemptible()) | |
1289 | break; | |
1290 | target->make_plt_entry(symtab, layout, gsym); | |
1291 | break; | |
1292 | ||
1293 | case elfcpp::R_POWERPC_ADDR16: | |
1294 | case elfcpp::R_POWERPC_ADDR16_LO: | |
1295 | case elfcpp::R_POWERPC_ADDR16_HI: | |
1296 | case elfcpp::R_POWERPC_ADDR16_HA: | |
1297 | case elfcpp::R_POWERPC_ADDR32: | |
1298 | case elfcpp::R_PPC64_ADDR64: | |
1299 | { | |
1300 | // Make a PLT entry if necessary. | |
1301 | if (gsym->needs_plt_entry()) | |
1302 | { | |
1303 | target->make_plt_entry(symtab, layout, gsym); | |
1304 | // Since this is not a PC-relative relocation, we may be | |
1305 | // taking the address of a function. In that case we need to | |
1306 | // set the entry in the dynamic symbol table to the address of | |
1307 | // the PLT entry. | |
1308 | if (gsym->is_from_dynobj() && !parameters->options().shared()) | |
1309 | gsym->set_needs_dynsym_value(); | |
1310 | } | |
1311 | // Make a dynamic relocation if necessary. | |
1312 | if (gsym->needs_dynamic_reloc(Symbol::ABSOLUTE_REF)) | |
1313 | { | |
1314 | if (target->may_need_copy_reloc(gsym)) | |
1315 | { | |
1316 | target->copy_reloc(symtab, layout, object, | |
1317 | data_shndx, output_section, gsym, reloc); | |
1318 | } | |
1319 | else if ((r_type == elfcpp::R_POWERPC_ADDR32 | |
1320 | || r_type == elfcpp::R_PPC64_ADDR64) | |
1321 | && gsym->can_use_relative_reloc(false)) | |
1322 | { | |
1323 | Reloc_section* rela_dyn = target->rela_dyn_section(layout); | |
1324 | rela_dyn->add_global_relative(gsym, elfcpp::R_POWERPC_RELATIVE, | |
1325 | output_section, object, | |
1326 | data_shndx, reloc.get_r_offset(), | |
1327 | reloc.get_r_addend()); | |
1328 | } | |
1329 | else | |
1330 | { | |
1331 | Reloc_section* rela_dyn = target->rela_dyn_section(layout); | |
1332 | ||
1333 | check_non_pic(object, r_type); | |
1334 | if (gsym->is_from_dynobj() | |
1335 | || gsym->is_undefined() | |
1336 | || gsym->is_preemptible()) | |
1337 | rela_dyn->add_global(gsym, r_type, output_section, | |
1338 | object, data_shndx, | |
1339 | reloc.get_r_offset(), | |
1340 | reloc.get_r_addend()); | |
1341 | else | |
1342 | rela_dyn->add_global_relative(gsym, r_type, | |
1343 | output_section, object, | |
1344 | data_shndx, | |
1345 | reloc.get_r_offset(), | |
1346 | reloc.get_r_addend()); | |
1347 | } | |
1348 | } | |
1349 | } | |
1350 | break; | |
1351 | ||
1352 | case elfcpp::R_POWERPC_REL24: | |
1353 | case elfcpp::R_PPC_LOCAL24PC: | |
1354 | case elfcpp::R_PPC_REL16: | |
1355 | case elfcpp::R_PPC_REL16_LO: | |
1356 | case elfcpp::R_PPC_REL16_HI: | |
1357 | case elfcpp::R_PPC_REL16_HA: | |
1358 | { | |
1359 | if (gsym->needs_plt_entry()) | |
1360 | target->make_plt_entry(symtab, layout, gsym); | |
1361 | // Make a dynamic relocation if necessary. | |
1362 | int flags = Symbol::NON_PIC_REF; | |
1363 | if (gsym->type() == elfcpp::STT_FUNC) | |
1364 | flags |= Symbol::FUNCTION_CALL; | |
1365 | if (gsym->needs_dynamic_reloc(flags)) | |
1366 | { | |
1367 | if (target->may_need_copy_reloc(gsym)) | |
1368 | { | |
1369 | target->copy_reloc(symtab, layout, object, | |
1370 | data_shndx, output_section, gsym, | |
1371 | reloc); | |
1372 | } | |
1373 | else | |
1374 | { | |
1375 | Reloc_section* rela_dyn = target->rela_dyn_section(layout); | |
1376 | check_non_pic(object, r_type); | |
1377 | rela_dyn->add_global(gsym, r_type, output_section, object, | |
1378 | data_shndx, reloc.get_r_offset(), | |
1379 | reloc.get_r_addend()); | |
1380 | } | |
1381 | } | |
1382 | } | |
1383 | break; | |
1384 | ||
1385 | case elfcpp::R_POWERPC_GOT16: | |
1386 | case elfcpp::R_POWERPC_GOT16_LO: | |
1387 | case elfcpp::R_POWERPC_GOT16_HI: | |
1388 | case elfcpp::R_POWERPC_GOT16_HA: | |
1389 | case elfcpp::R_PPC64_TOC16: | |
1390 | case elfcpp::R_PPC64_TOC16_LO: | |
1391 | case elfcpp::R_PPC64_TOC16_HI: | |
1392 | case elfcpp::R_PPC64_TOC16_HA: | |
1393 | case elfcpp::R_PPC64_TOC16_DS: | |
1394 | case elfcpp::R_PPC64_TOC16_LO_DS: | |
1395 | { | |
1396 | // The symbol requires a GOT entry. | |
1397 | Output_data_got<size, big_endian>* got; | |
1398 | ||
1399 | got = target->got_section(symtab, layout); | |
1400 | if (gsym->final_value_is_known()) | |
1401 | got->add_global(gsym, GOT_TYPE_STANDARD); | |
1402 | else | |
1403 | { | |
1404 | // If this symbol is not fully resolved, we need to add a | |
1405 | // dynamic relocation for it. | |
1406 | Reloc_section* rela_dyn = target->rela_dyn_section(layout); | |
1407 | if (gsym->is_from_dynobj() | |
1408 | || gsym->is_undefined() | |
1409 | || gsym->is_preemptible()) | |
1410 | got->add_global_with_rela(gsym, GOT_TYPE_STANDARD, rela_dyn, | |
1411 | elfcpp::R_POWERPC_GLOB_DAT); | |
1412 | else if (!gsym->has_got_offset(GOT_TYPE_STANDARD)) | |
1413 | { | |
1414 | unsigned int off = got->add_constant(0); | |
1415 | ||
1416 | gsym->set_got_offset(GOT_TYPE_STANDARD, off); | |
1417 | rela_dyn->add_global_relative(gsym, elfcpp::R_POWERPC_RELATIVE, | |
1418 | got, off, 0); | |
1419 | } | |
1420 | } | |
1421 | } | |
1422 | break; | |
1423 | ||
1424 | case elfcpp::R_PPC64_TOC: | |
1425 | // We need a GOT section. | |
1426 | target->got_section(symtab, layout); | |
1427 | break; | |
1428 | ||
1429 | case elfcpp::R_POWERPC_GOT_TPREL16: | |
1430 | case elfcpp::R_POWERPC_TLS: | |
1431 | // XXX TLS | |
1432 | break; | |
1433 | ||
1434 | // These are relocations which should only be seen by the | |
1435 | // dynamic linker, and should never be seen here. | |
1436 | case elfcpp::R_POWERPC_COPY: | |
1437 | case elfcpp::R_POWERPC_GLOB_DAT: | |
1438 | case elfcpp::R_POWERPC_JMP_SLOT: | |
1439 | case elfcpp::R_POWERPC_RELATIVE: | |
1440 | case elfcpp::R_POWERPC_DTPMOD: | |
1441 | gold_error(_("%s: unexpected reloc %u in object file"), | |
1442 | object->name().c_str(), r_type); | |
1443 | break; | |
1444 | ||
1445 | default: | |
1446 | unsupported_reloc_global(object, r_type, gsym); | |
1447 | break; | |
1448 | } | |
1449 | } | |
1450 | ||
6d03d481 ST |
1451 | // Process relocations for gc. |
1452 | ||
1453 | template<int size, bool big_endian> | |
1454 | void | |
1455 | Target_powerpc<size, big_endian>::gc_process_relocs( | |
1456 | const General_options& options, | |
1457 | Symbol_table* symtab, | |
1458 | Layout* layout, | |
1459 | Sized_relobj<size, big_endian>* object, | |
1460 | unsigned int data_shndx, | |
1461 | unsigned int, | |
1462 | const unsigned char* prelocs, | |
1463 | size_t reloc_count, | |
1464 | Output_section* output_section, | |
1465 | bool needs_special_offset_handling, | |
1466 | size_t local_symbol_count, | |
1467 | const unsigned char* plocal_symbols) | |
1468 | { | |
1469 | typedef Target_powerpc<size, big_endian> Powerpc; | |
1470 | typedef typename Target_powerpc<size, big_endian>::Scan Scan; | |
1471 | ||
1472 | gold::gc_process_relocs<size, big_endian, Powerpc, elfcpp::SHT_RELA, Scan>( | |
1473 | options, | |
1474 | symtab, | |
1475 | layout, | |
1476 | this, | |
1477 | object, | |
1478 | data_shndx, | |
1479 | prelocs, | |
1480 | reloc_count, | |
1481 | output_section, | |
1482 | needs_special_offset_handling, | |
1483 | local_symbol_count, | |
1484 | plocal_symbols); | |
1485 | } | |
1486 | ||
42cacb20 DE |
1487 | // Scan relocations for a section. |
1488 | ||
1489 | template<int size, bool big_endian> | |
1490 | void | |
1491 | Target_powerpc<size, big_endian>::scan_relocs( | |
1492 | const General_options& options, | |
1493 | Symbol_table* symtab, | |
1494 | Layout* layout, | |
1495 | Sized_relobj<size, big_endian>* object, | |
1496 | unsigned int data_shndx, | |
1497 | unsigned int sh_type, | |
1498 | const unsigned char* prelocs, | |
1499 | size_t reloc_count, | |
1500 | Output_section* output_section, | |
1501 | bool needs_special_offset_handling, | |
1502 | size_t local_symbol_count, | |
1503 | const unsigned char* plocal_symbols) | |
1504 | { | |
1505 | typedef Target_powerpc<size, big_endian> Powerpc; | |
1506 | typedef typename Target_powerpc<size, big_endian>::Scan Scan; | |
1507 | static Output_data_space* sdata; | |
1508 | ||
1509 | if (sh_type == elfcpp::SHT_REL) | |
1510 | { | |
1511 | gold_error(_("%s: unsupported REL reloc section"), | |
1512 | object->name().c_str()); | |
1513 | return; | |
1514 | } | |
1515 | ||
1516 | // Define _SDA_BASE_ at the start of the .sdata section. | |
1517 | if (sdata == NULL) | |
1518 | { | |
1519 | // layout->find_output_section(".sdata") == NULL | |
1520 | sdata = new Output_data_space(4, "** sdata"); | |
1521 | Output_section* os = layout->add_output_section_data(".sdata", 0, | |
1522 | elfcpp::SHF_ALLOC | |
1523 | | elfcpp::SHF_WRITE, | |
1524 | sdata); | |
1525 | symtab->define_in_output_data("_SDA_BASE_", NULL, | |
1526 | os, | |
1527 | 32768, 0, | |
1528 | elfcpp::STT_OBJECT, | |
1529 | elfcpp::STB_LOCAL, | |
1530 | elfcpp::STV_HIDDEN, 0, | |
1531 | false, false); | |
1532 | } | |
1533 | ||
1534 | gold::scan_relocs<size, big_endian, Powerpc, elfcpp::SHT_RELA, Scan>( | |
1535 | options, | |
1536 | symtab, | |
1537 | layout, | |
1538 | this, | |
1539 | object, | |
1540 | data_shndx, | |
1541 | prelocs, | |
1542 | reloc_count, | |
1543 | output_section, | |
1544 | needs_special_offset_handling, | |
1545 | local_symbol_count, | |
1546 | plocal_symbols); | |
1547 | } | |
1548 | ||
1549 | // Finalize the sections. | |
1550 | ||
1551 | template<int size, bool big_endian> | |
1552 | void | |
1553 | Target_powerpc<size, big_endian>::do_finalize_sections(Layout* layout) | |
1554 | { | |
1555 | // Fill in some more dynamic tags. | |
1556 | Output_data_dynamic* const odyn = layout->dynamic_data(); | |
1557 | if (odyn != NULL) | |
1558 | { | |
1559 | if (this->plt_ != NULL) | |
1560 | { | |
1561 | const Output_data* od = this->plt_->rel_plt(); | |
1562 | odyn->add_section_size(elfcpp::DT_PLTRELSZ, od); | |
1563 | odyn->add_section_address(elfcpp::DT_JMPREL, od); | |
1564 | odyn->add_constant(elfcpp::DT_PLTREL, elfcpp::DT_RELA); | |
1565 | ||
1566 | odyn->add_section_address(elfcpp::DT_PLTGOT, this->plt_); | |
1567 | } | |
1568 | ||
1569 | if (this->rela_dyn_ != NULL) | |
1570 | { | |
1571 | const Output_data* od = this->rela_dyn_; | |
1572 | odyn->add_section_address(elfcpp::DT_RELA, od); | |
1573 | odyn->add_section_size(elfcpp::DT_RELASZ, od); | |
1574 | odyn->add_constant(elfcpp::DT_RELAENT, | |
1575 | elfcpp::Elf_sizes<size>::rela_size); | |
1576 | } | |
1577 | ||
1578 | if (!parameters->options().shared()) | |
1579 | { | |
1580 | // The value of the DT_DEBUG tag is filled in by the dynamic | |
1581 | // linker at run time, and used by the debugger. | |
1582 | odyn->add_constant(elfcpp::DT_DEBUG, 0); | |
1583 | } | |
1584 | } | |
1585 | ||
1586 | // Emit any relocs we saved in an attempt to avoid generating COPY | |
1587 | // relocs. | |
1588 | if (this->copy_relocs_.any_saved_relocs()) | |
1589 | this->copy_relocs_.emit(this->rela_dyn_section(layout)); | |
1590 | } | |
1591 | ||
1592 | // Perform a relocation. | |
1593 | ||
1594 | template<int size, bool big_endian> | |
1595 | inline bool | |
1596 | Target_powerpc<size, big_endian>::Relocate::relocate( | |
1597 | const Relocate_info<size, big_endian>* relinfo, | |
1598 | Target_powerpc* target, | |
031cdbed | 1599 | Output_section*, |
42cacb20 DE |
1600 | size_t relnum, |
1601 | const elfcpp::Rela<size, big_endian>& rela, | |
1602 | unsigned int r_type, | |
1603 | const Sized_symbol<size>* gsym, | |
1604 | const Symbol_value<size>* psymval, | |
1605 | unsigned char* view, | |
1606 | typename elfcpp::Elf_types<size>::Elf_Addr address, | |
1607 | section_size_type /* view_size */) | |
1608 | { | |
1609 | const unsigned int toc_base_offset = 0x8000; | |
1610 | typedef Powerpc_relocate_functions<size, big_endian> Reloc; | |
1611 | ||
1612 | // Pick the value to use for symbols defined in shared objects. | |
1613 | Symbol_value<size> symval; | |
1614 | if (gsym != NULL | |
de4c45bd ILT |
1615 | && gsym->use_plt_offset(r_type == elfcpp::R_POWERPC_REL24 |
1616 | || r_type == elfcpp::R_PPC_LOCAL24PC | |
1617 | || r_type == elfcpp::R_PPC_REL16 | |
1618 | || r_type == elfcpp::R_PPC_REL16_LO | |
1619 | || r_type == elfcpp::R_PPC_REL16_HI | |
1620 | || r_type == elfcpp::R_PPC_REL16_HA)) | |
42cacb20 DE |
1621 | { |
1622 | elfcpp::Elf_Xword value; | |
1623 | ||
1624 | value = target->plt_section()->address() + gsym->plt_offset(); | |
1625 | ||
1626 | symval.set_output_value(value); | |
1627 | ||
1628 | psymval = &symval; | |
1629 | } | |
1630 | ||
1631 | const Sized_relobj<size, big_endian>* object = relinfo->object; | |
1632 | elfcpp::Elf_Xword addend = rela.get_r_addend(); | |
1633 | ||
1634 | // Get the GOT offset if needed. Unlike i386 and x86_64, our GOT | |
1635 | // pointer points to the beginning, not the end, of the table. | |
1636 | // So we just use the plain offset. | |
1637 | bool have_got_offset = false; | |
1638 | unsigned int got_offset = 0; | |
1639 | unsigned int got2_offset = 0; | |
1640 | switch (r_type) | |
1641 | { | |
1642 | case elfcpp::R_PPC64_TOC16: | |
1643 | case elfcpp::R_PPC64_TOC16_LO: | |
1644 | case elfcpp::R_PPC64_TOC16_HI: | |
1645 | case elfcpp::R_PPC64_TOC16_HA: | |
1646 | case elfcpp::R_PPC64_TOC16_DS: | |
1647 | case elfcpp::R_PPC64_TOC16_LO_DS: | |
1648 | // Subtract the TOC base address. | |
1649 | addend -= target->toc_section()->address() + toc_base_offset; | |
1650 | /* FALLTHRU */ | |
1651 | ||
1652 | case elfcpp::R_POWERPC_GOT16: | |
1653 | case elfcpp::R_POWERPC_GOT16_LO: | |
1654 | case elfcpp::R_POWERPC_GOT16_HI: | |
1655 | case elfcpp::R_POWERPC_GOT16_HA: | |
1656 | case elfcpp::R_PPC64_GOT16_DS: | |
1657 | case elfcpp::R_PPC64_GOT16_LO_DS: | |
1658 | if (gsym != NULL) | |
1659 | { | |
1660 | gold_assert(gsym->has_got_offset(GOT_TYPE_STANDARD)); | |
1661 | got_offset = gsym->got_offset(GOT_TYPE_STANDARD); | |
1662 | } | |
1663 | else | |
1664 | { | |
1665 | unsigned int r_sym = elfcpp::elf_r_sym<size>(rela.get_r_info()); | |
1666 | gold_assert(object->local_has_got_offset(r_sym, GOT_TYPE_STANDARD)); | |
1667 | got_offset = object->local_got_offset(r_sym, GOT_TYPE_STANDARD); | |
1668 | } | |
1669 | have_got_offset = true; | |
1670 | break; | |
1671 | ||
1672 | // R_PPC_PLTREL24 is rather special. If non-zero, | |
1673 | // the addend specifies the GOT pointer offset within .got2. | |
1674 | case elfcpp::R_PPC_PLTREL24: | |
1675 | if (addend >= 32768) | |
1676 | { | |
1677 | Output_data_space* got2; | |
1678 | got2 = target->got2_section(); | |
1679 | got2_offset = got2->offset(); | |
1680 | addend += got2_offset; | |
1681 | } | |
1682 | have_got_offset = true; | |
1683 | break; | |
1684 | ||
1685 | default: | |
1686 | break; | |
1687 | } | |
1688 | ||
1689 | switch (r_type) | |
1690 | { | |
1691 | case elfcpp::R_POWERPC_NONE: | |
1692 | case elfcpp::R_POWERPC_GNU_VTINHERIT: | |
1693 | case elfcpp::R_POWERPC_GNU_VTENTRY: | |
1694 | break; | |
1695 | ||
1696 | case elfcpp::R_POWERPC_REL32: | |
1697 | Reloc::rel32(view, object, psymval, addend, address); | |
1698 | break; | |
1699 | ||
1700 | case elfcpp::R_POWERPC_REL24: | |
1701 | Reloc::rel24(view, object, psymval, addend, address); | |
1702 | break; | |
1703 | ||
1704 | case elfcpp::R_POWERPC_REL14: | |
1705 | Reloc::rel14(view, object, psymval, addend, address); | |
1706 | break; | |
1707 | ||
1708 | case elfcpp::R_PPC_PLTREL24: | |
1709 | Reloc::rel24(view, object, psymval, addend, address); | |
1710 | break; | |
1711 | ||
1712 | case elfcpp::R_PPC_LOCAL24PC: | |
1713 | Reloc::rel24(view, object, psymval, addend, address); | |
1714 | break; | |
1715 | ||
1716 | case elfcpp::R_PPC64_ADDR64: | |
1717 | if (!parameters->options().output_is_position_independent()) | |
1718 | Relocate_functions<size, big_endian>::rela64(view, object, | |
1719 | psymval, addend); | |
1720 | break; | |
1721 | ||
1722 | case elfcpp::R_POWERPC_ADDR32: | |
1723 | if (!parameters->options().output_is_position_independent()) | |
1724 | Relocate_functions<size, big_endian>::rela32(view, object, | |
1725 | psymval, addend); | |
1726 | break; | |
1727 | ||
1728 | case elfcpp::R_POWERPC_ADDR16_LO: | |
1729 | Reloc::addr16_lo(view, object, psymval, addend); | |
1730 | break; | |
1731 | ||
1732 | case elfcpp::R_POWERPC_ADDR16_HI: | |
1733 | Reloc::addr16_hi(view, object, psymval, addend); | |
1734 | break; | |
1735 | ||
1736 | case elfcpp::R_POWERPC_ADDR16_HA: | |
1737 | Reloc::addr16_ha(view, object, psymval, addend); | |
1738 | break; | |
1739 | ||
1740 | case elfcpp::R_PPC_REL16_LO: | |
1741 | Reloc::rel16_lo(view, object, psymval, addend, address); | |
1742 | break; | |
1743 | ||
1744 | case elfcpp::R_PPC_REL16_HI: | |
1745 | Reloc::rel16_lo(view, object, psymval, addend, address); | |
1746 | break; | |
1747 | ||
1748 | case elfcpp::R_PPC_REL16_HA: | |
83d22aa8 | 1749 | Reloc::rel16_ha(view, object, psymval, addend, address); |
42cacb20 DE |
1750 | break; |
1751 | ||
1752 | case elfcpp::R_POWERPC_GOT16: | |
1753 | Reloc::addr16(view, got_offset, addend); | |
1754 | break; | |
1755 | ||
1756 | case elfcpp::R_POWERPC_GOT16_LO: | |
1757 | Reloc::addr16_lo(view, got_offset, addend); | |
1758 | break; | |
1759 | ||
1760 | case elfcpp::R_POWERPC_GOT16_HI: | |
1761 | Reloc::addr16_hi(view, got_offset, addend); | |
1762 | break; | |
1763 | ||
1764 | case elfcpp::R_POWERPC_GOT16_HA: | |
1765 | Reloc::addr16_ha(view, got_offset, addend); | |
1766 | break; | |
1767 | ||
1768 | case elfcpp::R_PPC64_TOC16: | |
1769 | Reloc::addr16(view, got_offset, addend); | |
1770 | break; | |
1771 | ||
1772 | case elfcpp::R_PPC64_TOC16_LO: | |
1773 | Reloc::addr16_lo(view, got_offset, addend); | |
1774 | break; | |
1775 | ||
1776 | case elfcpp::R_PPC64_TOC16_HI: | |
1777 | Reloc::addr16_hi(view, got_offset, addend); | |
1778 | break; | |
1779 | ||
1780 | case elfcpp::R_PPC64_TOC16_HA: | |
1781 | Reloc::addr16_ha(view, got_offset, addend); | |
1782 | break; | |
1783 | ||
1784 | case elfcpp::R_PPC64_TOC16_DS: | |
1785 | case elfcpp::R_PPC64_TOC16_LO_DS: | |
1786 | Reloc::addr16_ds(view, got_offset, addend); | |
1787 | break; | |
1788 | ||
1789 | case elfcpp::R_PPC64_TOC: | |
1790 | { | |
1791 | elfcpp::Elf_types<64>::Elf_Addr value; | |
1792 | value = target->toc_section()->address() + toc_base_offset; | |
1793 | Relocate_functions<64, false>::rela64(view, value, addend); | |
1794 | } | |
1795 | break; | |
1796 | ||
1797 | case elfcpp::R_POWERPC_COPY: | |
1798 | case elfcpp::R_POWERPC_GLOB_DAT: | |
1799 | case elfcpp::R_POWERPC_JMP_SLOT: | |
1800 | case elfcpp::R_POWERPC_RELATIVE: | |
1801 | // This is an outstanding tls reloc, which is unexpected when | |
1802 | // linking. | |
1803 | case elfcpp::R_POWERPC_DTPMOD: | |
1804 | gold_error_at_location(relinfo, relnum, rela.get_r_offset(), | |
1805 | _("unexpected reloc %u in object file"), | |
1806 | r_type); | |
1807 | break; | |
1808 | ||
1809 | default: | |
1810 | gold_error_at_location(relinfo, relnum, rela.get_r_offset(), | |
1811 | _("unsupported reloc %u"), | |
1812 | r_type); | |
1813 | break; | |
1814 | } | |
1815 | ||
1816 | return true; | |
1817 | } | |
1818 | ||
1819 | // Perform a TLS relocation. | |
1820 | ||
1821 | template<int size, bool big_endian> | |
1822 | inline void | |
1823 | Target_powerpc<size, big_endian>::Relocate::relocate_tls( | |
1824 | const Relocate_info<size, big_endian>* relinfo, | |
1825 | Target_powerpc<size, big_endian>* target, | |
1826 | size_t relnum, | |
1827 | const elfcpp::Rela<size, big_endian>& rela, | |
1828 | unsigned int r_type, | |
1829 | const Sized_symbol<size>* gsym, | |
1830 | const Symbol_value<size>* psymval, | |
1831 | unsigned char* view, | |
1832 | typename elfcpp::Elf_types<size>::Elf_Addr address, | |
1833 | section_size_type) | |
1834 | { | |
1835 | Output_segment* tls_segment = relinfo->layout->tls_segment(); | |
1836 | typedef Powerpc_relocate_functions<size, big_endian> Reloc; | |
1837 | const Sized_relobj<size, big_endian>* object = relinfo->object; | |
1838 | ||
1839 | const elfcpp::Elf_Xword addend = rela.get_r_addend(); | |
1840 | typename elfcpp::Elf_types<size>::Elf_Addr value = psymval->value(object, 0); | |
1841 | ||
1842 | const bool is_final = | |
1843 | (gsym == NULL | |
1844 | ? !parameters->options().output_is_position_independent() | |
1845 | : gsym->final_value_is_known()); | |
1846 | const tls::Tls_optimization optimized_type | |
1847 | = optimize_tls_reloc(is_final, r_type); | |
1848 | ||
1849 | switch (r_type) | |
1850 | { | |
1851 | // XXX | |
1852 | } | |
1853 | } | |
1854 | ||
1855 | // Relocate section data. | |
1856 | ||
1857 | template<int size, bool big_endian> | |
1858 | void | |
1859 | Target_powerpc<size, big_endian>::relocate_section( | |
1860 | const Relocate_info<size, big_endian>* relinfo, | |
1861 | unsigned int sh_type, | |
1862 | const unsigned char* prelocs, | |
1863 | size_t reloc_count, | |
1864 | Output_section* output_section, | |
1865 | bool needs_special_offset_handling, | |
1866 | unsigned char* view, | |
1867 | typename elfcpp::Elf_types<size>::Elf_Addr address, | |
1868 | section_size_type view_size) | |
1869 | { | |
1870 | typedef Target_powerpc<size, big_endian> Powerpc; | |
1871 | typedef typename Target_powerpc<size, big_endian>::Relocate Powerpc_relocate; | |
1872 | ||
1873 | gold_assert(sh_type == elfcpp::SHT_RELA); | |
1874 | ||
1875 | gold::relocate_section<size, big_endian, Powerpc, elfcpp::SHT_RELA, | |
1876 | Powerpc_relocate>( | |
1877 | relinfo, | |
1878 | this, | |
1879 | prelocs, | |
1880 | reloc_count, | |
1881 | output_section, | |
1882 | needs_special_offset_handling, | |
1883 | view, | |
1884 | address, | |
1885 | view_size); | |
1886 | } | |
1887 | ||
1888 | // Return the size of a relocation while scanning during a relocatable | |
1889 | // link. | |
1890 | ||
1891 | template<int size, bool big_endian> | |
1892 | unsigned int | |
1893 | Target_powerpc<size, big_endian>::Relocatable_size_for_reloc::get_size_for_reloc( | |
1894 | unsigned int, | |
1895 | Relobj*) | |
1896 | { | |
1897 | // We are always SHT_RELA, so we should never get here. | |
1898 | gold_unreachable(); | |
1899 | return 0; | |
1900 | } | |
1901 | ||
1902 | // Scan the relocs during a relocatable link. | |
1903 | ||
1904 | template<int size, bool big_endian> | |
1905 | void | |
1906 | Target_powerpc<size, big_endian>::scan_relocatable_relocs( | |
1907 | const General_options& options, | |
1908 | Symbol_table* symtab, | |
1909 | Layout* layout, | |
1910 | Sized_relobj<size, big_endian>* object, | |
1911 | unsigned int data_shndx, | |
1912 | unsigned int sh_type, | |
1913 | const unsigned char* prelocs, | |
1914 | size_t reloc_count, | |
1915 | Output_section* output_section, | |
1916 | bool needs_special_offset_handling, | |
1917 | size_t local_symbol_count, | |
1918 | const unsigned char* plocal_symbols, | |
1919 | Relocatable_relocs* rr) | |
1920 | { | |
1921 | gold_assert(sh_type == elfcpp::SHT_RELA); | |
1922 | ||
1923 | typedef gold::Default_scan_relocatable_relocs<elfcpp::SHT_RELA, | |
1924 | Relocatable_size_for_reloc> Scan_relocatable_relocs; | |
1925 | ||
1926 | gold::scan_relocatable_relocs<size, big_endian, elfcpp::SHT_RELA, | |
1927 | Scan_relocatable_relocs>( | |
1928 | options, | |
1929 | symtab, | |
1930 | layout, | |
1931 | object, | |
1932 | data_shndx, | |
1933 | prelocs, | |
1934 | reloc_count, | |
1935 | output_section, | |
1936 | needs_special_offset_handling, | |
1937 | local_symbol_count, | |
1938 | plocal_symbols, | |
1939 | rr); | |
1940 | } | |
1941 | ||
1942 | // Relocate a section during a relocatable link. | |
1943 | ||
1944 | template<int size, bool big_endian> | |
1945 | void | |
1946 | Target_powerpc<size, big_endian>::relocate_for_relocatable( | |
1947 | const Relocate_info<size, big_endian>* relinfo, | |
1948 | unsigned int sh_type, | |
1949 | const unsigned char* prelocs, | |
1950 | size_t reloc_count, | |
1951 | Output_section* output_section, | |
1952 | off_t offset_in_output_section, | |
1953 | const Relocatable_relocs* rr, | |
1954 | unsigned char* view, | |
1955 | typename elfcpp::Elf_types<size>::Elf_Addr view_address, | |
1956 | section_size_type view_size, | |
1957 | unsigned char* reloc_view, | |
1958 | section_size_type reloc_view_size) | |
1959 | { | |
1960 | gold_assert(sh_type == elfcpp::SHT_RELA); | |
1961 | ||
1962 | gold::relocate_for_relocatable<size, big_endian, elfcpp::SHT_RELA>( | |
1963 | relinfo, | |
1964 | prelocs, | |
1965 | reloc_count, | |
1966 | output_section, | |
1967 | offset_in_output_section, | |
1968 | rr, | |
1969 | view, | |
1970 | view_address, | |
1971 | view_size, | |
1972 | reloc_view, | |
1973 | reloc_view_size); | |
1974 | } | |
1975 | ||
1976 | // Return the value to use for a dynamic which requires special | |
1977 | // treatment. This is how we support equality comparisons of function | |
1978 | // pointers across shared library boundaries, as described in the | |
1979 | // processor specific ABI supplement. | |
1980 | ||
1981 | template<int size, bool big_endian> | |
1982 | uint64_t | |
1983 | Target_powerpc<size, big_endian>::do_dynsym_value(const Symbol* gsym) const | |
1984 | { | |
1985 | gold_assert(gsym->is_from_dynobj() && gsym->has_plt_offset()); | |
1986 | return this->plt_section()->address() + gsym->plt_offset(); | |
1987 | } | |
1988 | ||
1989 | // The selector for powerpc object files. | |
1990 | ||
1991 | template<int size, bool big_endian> | |
1992 | class Target_selector_powerpc : public Target_selector | |
1993 | { | |
1994 | public: | |
1995 | Target_selector_powerpc() | |
1996 | : Target_selector(elfcpp::EM_NONE, size, big_endian, | |
1997 | (size == 64 ? | |
1998 | (big_endian ? "elf64-powerpc" : "elf64-powerpcle") : | |
1999 | (big_endian ? "elf32-powerpc" : "elf32-powerpcle"))) | |
2000 | { } | |
2001 | ||
42cacb20 DE |
2002 | Target* do_recognize(int machine, int, int) |
2003 | { | |
2004 | switch (size) | |
2005 | { | |
2006 | case 64: | |
2007 | if (machine != elfcpp::EM_PPC64) | |
2008 | return NULL; | |
2009 | break; | |
2010 | ||
2011 | case 32: | |
2012 | if (machine != elfcpp::EM_PPC) | |
2013 | return NULL; | |
2014 | break; | |
2015 | ||
2016 | default: | |
2017 | return NULL; | |
2018 | } | |
2019 | ||
7f055c20 | 2020 | return this->instantiate_target(); |
42cacb20 DE |
2021 | } |
2022 | ||
2023 | Target* do_instantiate_target() | |
7f055c20 | 2024 | { return new Target_powerpc<size, big_endian>(); } |
42cacb20 DE |
2025 | }; |
2026 | ||
2027 | Target_selector_powerpc<32, true> target_selector_ppc32; | |
2028 | Target_selector_powerpc<32, false> target_selector_ppc32le; | |
2029 | Target_selector_powerpc<64, true> target_selector_ppc64; | |
2030 | Target_selector_powerpc<64, false> target_selector_ppc64le; | |
2031 | ||
2032 | } // End anonymous namespace. |