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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" | |
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 | ||
50 | template<int size, bool big_endian> | |
51 | class Target_powerpc : public Sized_target<size, big_endian> | |
52 | { | |
53 | public: | |
54 | typedef Output_data_reloc<elfcpp::SHT_RELA, true, size, big_endian> Reloc_section; | |
55 | ||
56 | Target_powerpc() | |
57 | : Sized_target<size, big_endian>(&powerpc_info), | |
58 | got_(NULL), got2_(NULL), toc_(NULL), | |
59 | plt_(NULL), rela_dyn_(NULL), | |
60 | copy_relocs_(elfcpp::R_POWERPC_COPY), | |
61 | dynbss_(NULL), got_mod_index_offset_(-1U) | |
62 | { | |
63 | } | |
64 | ||
6d03d481 ST |
65 | // Process the relocations to determine unreferenced sections for |
66 | // garbage collection. | |
67 | void | |
ad0f2072 | 68 | gc_process_relocs(Symbol_table* symtab, |
6d03d481 ST |
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 | |
ad0f2072 | 82 | scan_relocs(Symbol_table* symtab, |
42cacb20 DE |
83 | Layout* layout, |
84 | Sized_relobj<size, big_endian>* object, | |
85 | unsigned int data_shndx, | |
86 | unsigned int sh_type, | |
87 | const unsigned char* prelocs, | |
88 | size_t reloc_count, | |
89 | Output_section* output_section, | |
90 | bool needs_special_offset_handling, | |
91 | size_t local_symbol_count, | |
92 | const unsigned char* plocal_symbols); | |
93 | // Finalize the sections. | |
94 | void | |
f59f41f3 | 95 | do_finalize_sections(Layout*, const Input_objects*, Symbol_table*); |
42cacb20 DE |
96 | |
97 | // Return the value to use for a dynamic which requires special | |
98 | // treatment. | |
99 | uint64_t | |
100 | do_dynsym_value(const Symbol*) const; | |
101 | ||
102 | // Relocate a section. | |
103 | void | |
104 | relocate_section(const Relocate_info<size, big_endian>*, | |
105 | unsigned int sh_type, | |
106 | const unsigned char* prelocs, | |
107 | size_t reloc_count, | |
108 | Output_section* output_section, | |
109 | bool needs_special_offset_handling, | |
110 | unsigned char* view, | |
111 | typename elfcpp::Elf_types<size>::Elf_Addr view_address, | |
364c7fa5 ILT |
112 | section_size_type view_size, |
113 | const Reloc_symbol_changes*); | |
42cacb20 DE |
114 | |
115 | // Scan the relocs during a relocatable link. | |
116 | void | |
ad0f2072 | 117 | scan_relocatable_relocs(Symbol_table* symtab, |
42cacb20 DE |
118 | Layout* layout, |
119 | Sized_relobj<size, big_endian>* object, | |
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 | Relocatable_relocs*); | |
129 | ||
130 | // Relocate a section during a relocatable link. | |
131 | void | |
132 | relocate_for_relocatable(const Relocate_info<size, big_endian>*, | |
133 | unsigned int sh_type, | |
134 | const unsigned char* prelocs, | |
135 | size_t reloc_count, | |
136 | Output_section* output_section, | |
137 | off_t offset_in_output_section, | |
138 | const Relocatable_relocs*, | |
139 | unsigned char* view, | |
140 | typename elfcpp::Elf_types<size>::Elf_Addr view_address, | |
141 | section_size_type view_size, | |
142 | unsigned char* reloc_view, | |
143 | section_size_type reloc_view_size); | |
144 | ||
145 | // Return whether SYM is defined by the ABI. | |
146 | bool | |
9c2d0ef9 | 147 | do_is_defined_by_abi(const Symbol* sym) const |
42cacb20 DE |
148 | { |
149 | return strcmp(sym->name(), "___tls_get_addr") == 0; | |
150 | } | |
151 | ||
152 | // Return the size of the GOT section. | |
153 | section_size_type | |
154 | got_size() | |
155 | { | |
156 | gold_assert(this->got_ != NULL); | |
157 | return this->got_->data_size(); | |
158 | } | |
159 | ||
160 | private: | |
161 | ||
162 | // The class which scans relocations. | |
163 | class Scan | |
164 | { | |
165 | public: | |
166 | Scan() | |
167 | : issued_non_pic_error_(false) | |
168 | { } | |
169 | ||
170 | inline void | |
ad0f2072 | 171 | local(Symbol_table* symtab, Layout* layout, Target_powerpc* target, |
42cacb20 DE |
172 | Sized_relobj<size, big_endian>* object, |
173 | unsigned int data_shndx, | |
174 | Output_section* output_section, | |
175 | const elfcpp::Rela<size, big_endian>& reloc, unsigned int r_type, | |
176 | const elfcpp::Sym<size, big_endian>& lsym); | |
177 | ||
178 | inline void | |
ad0f2072 | 179 | global(Symbol_table* symtab, Layout* layout, Target_powerpc* target, |
42cacb20 DE |
180 | Sized_relobj<size, big_endian>* object, |
181 | unsigned int data_shndx, | |
182 | Output_section* output_section, | |
183 | const elfcpp::Rela<size, big_endian>& reloc, unsigned int r_type, | |
184 | Symbol* gsym); | |
185 | ||
186 | private: | |
187 | static void | |
188 | unsupported_reloc_local(Sized_relobj<size, big_endian>*, | |
189 | unsigned int r_type); | |
190 | ||
191 | static void | |
192 | unsupported_reloc_global(Sized_relobj<size, big_endian>*, | |
193 | unsigned int r_type, Symbol*); | |
194 | ||
195 | static void | |
196 | generate_tls_call(Symbol_table* symtab, Layout* layout, | |
197 | Target_powerpc* target); | |
198 | ||
199 | void | |
200 | check_non_pic(Relobj*, unsigned int r_type); | |
201 | ||
202 | // Whether we have issued an error about a non-PIC compilation. | |
203 | bool issued_non_pic_error_; | |
204 | }; | |
205 | ||
206 | // The class which implements relocation. | |
207 | class Relocate | |
208 | { | |
209 | public: | |
210 | // Do a relocation. Return false if the caller should not issue | |
211 | // any warnings about this relocation. | |
212 | inline bool | |
213 | relocate(const Relocate_info<size, big_endian>*, Target_powerpc*, | |
031cdbed ILT |
214 | Output_section*, size_t relnum, |
215 | const elfcpp::Rela<size, big_endian>&, | |
42cacb20 DE |
216 | unsigned int r_type, const Sized_symbol<size>*, |
217 | const Symbol_value<size>*, | |
218 | unsigned char*, | |
219 | typename elfcpp::Elf_types<size>::Elf_Addr, | |
220 | section_size_type); | |
221 | ||
222 | private: | |
223 | // Do a TLS relocation. | |
224 | inline void | |
225 | relocate_tls(const Relocate_info<size, big_endian>*, | |
226 | Target_powerpc* target, | |
227 | size_t relnum, const elfcpp::Rela<size, big_endian>&, | |
228 | unsigned int r_type, const Sized_symbol<size>*, | |
229 | const Symbol_value<size>*, | |
230 | unsigned char*, | |
231 | typename elfcpp::Elf_types<size>::Elf_Addr, | |
232 | section_size_type); | |
233 | }; | |
234 | ||
235 | // A class which returns the size required for a relocation type, | |
236 | // used while scanning relocs during a relocatable link. | |
237 | class Relocatable_size_for_reloc | |
238 | { | |
239 | public: | |
240 | unsigned int | |
241 | get_size_for_reloc(unsigned int, Relobj*); | |
242 | }; | |
243 | ||
244 | // Get the GOT section, creating it if necessary. | |
245 | Output_data_got<size, big_endian>* | |
246 | got_section(Symbol_table*, Layout*); | |
247 | ||
248 | Output_data_space* | |
249 | got2_section() const | |
250 | { | |
251 | gold_assert (this->got2_ != NULL); | |
252 | return this->got2_; | |
253 | } | |
254 | ||
255 | // Get the TOC section. | |
256 | Output_data_space* | |
257 | toc_section() const | |
258 | { | |
259 | gold_assert (this->toc_ != NULL); | |
260 | return this->toc_; | |
261 | } | |
262 | ||
263 | // Create a PLT entry for a global symbol. | |
264 | void | |
265 | make_plt_entry(Symbol_table*, Layout*, Symbol*); | |
266 | ||
267 | // Create a GOT entry for the TLS module index. | |
268 | unsigned int | |
269 | got_mod_index_entry(Symbol_table* symtab, Layout* layout, | |
270 | Sized_relobj<size, big_endian>* object); | |
271 | ||
272 | // Get the PLT section. | |
273 | const Output_data_plt_powerpc<size, big_endian>* | |
274 | plt_section() const | |
275 | { | |
276 | gold_assert(this->plt_ != NULL); | |
277 | return this->plt_; | |
278 | } | |
279 | ||
280 | // Get the dynamic reloc section, creating it if necessary. | |
281 | Reloc_section* | |
282 | rela_dyn_section(Layout*); | |
283 | ||
42cacb20 DE |
284 | // Copy a relocation against a global symbol. |
285 | void | |
ef9beddf ILT |
286 | copy_reloc(Symbol_table* symtab, Layout* layout, |
287 | Sized_relobj<size, big_endian>* object, | |
42cacb20 DE |
288 | unsigned int shndx, Output_section* output_section, |
289 | Symbol* sym, const elfcpp::Rela<size, big_endian>& reloc) | |
290 | { | |
291 | this->copy_relocs_.copy_reloc(symtab, layout, | |
292 | symtab->get_sized_symbol<size>(sym), | |
293 | object, shndx, output_section, | |
294 | reloc, this->rela_dyn_section(layout)); | |
295 | } | |
296 | ||
297 | // Information about this specific target which we pass to the | |
298 | // general Target structure. | |
299 | static Target::Target_info powerpc_info; | |
300 | ||
301 | // The types of GOT entries needed for this platform. | |
302 | enum Got_type | |
303 | { | |
304 | GOT_TYPE_STANDARD = 0, // GOT entry for a regular symbol | |
305 | GOT_TYPE_TLS_OFFSET = 1, // GOT entry for TLS offset | |
306 | GOT_TYPE_TLS_PAIR = 2, // GOT entry for TLS module/offset pair | |
307 | }; | |
308 | ||
309 | // The GOT section. | |
310 | Output_data_got<size, big_endian>* got_; | |
311 | // The GOT2 section. | |
312 | Output_data_space* got2_; | |
313 | // The TOC section. | |
314 | Output_data_space* toc_; | |
315 | // The PLT section. | |
316 | Output_data_plt_powerpc<size, big_endian>* plt_; | |
317 | // The dynamic reloc section. | |
318 | Reloc_section* rela_dyn_; | |
319 | // Relocs saved to avoid a COPY reloc. | |
320 | Copy_relocs<elfcpp::SHT_RELA, size, big_endian> copy_relocs_; | |
321 | // Space for variables copied with a COPY reloc. | |
322 | Output_data_space* dynbss_; | |
323 | // Offset of the GOT entry for the TLS module index; | |
324 | unsigned int got_mod_index_offset_; | |
325 | }; | |
326 | ||
327 | template<> | |
328 | Target::Target_info Target_powerpc<32, true>::powerpc_info = | |
329 | { | |
330 | 32, // size | |
331 | true, // is_big_endian | |
332 | elfcpp::EM_PPC, // machine_code | |
333 | false, // has_make_symbol | |
334 | false, // has_resolve | |
335 | false, // has_code_fill | |
336 | true, // is_default_stack_executable | |
337 | '\0', // wrap_char | |
338 | "/usr/lib/ld.so.1", // dynamic_linker | |
339 | 0x10000000, // default_text_segment_address | |
340 | 64 * 1024, // abi_pagesize (overridable by -z max-page-size) | |
8a5e3e08 ILT |
341 | 4 * 1024, // common_pagesize (overridable by -z common-page-size) |
342 | elfcpp::SHN_UNDEF, // small_common_shndx | |
343 | elfcpp::SHN_UNDEF, // large_common_shndx | |
344 | 0, // small_common_section_flags | |
05a352e6 DK |
345 | 0, // large_common_section_flags |
346 | NULL, // attributes_section | |
347 | NULL // attributes_vendor | |
42cacb20 DE |
348 | }; |
349 | ||
350 | template<> | |
351 | Target::Target_info Target_powerpc<32, false>::powerpc_info = | |
352 | { | |
353 | 32, // size | |
354 | false, // is_big_endian | |
355 | elfcpp::EM_PPC, // machine_code | |
356 | false, // has_make_symbol | |
357 | false, // has_resolve | |
358 | false, // has_code_fill | |
359 | true, // is_default_stack_executable | |
360 | '\0', // wrap_char | |
361 | "/usr/lib/ld.so.1", // dynamic_linker | |
362 | 0x10000000, // default_text_segment_address | |
363 | 64 * 1024, // abi_pagesize (overridable by -z max-page-size) | |
8a5e3e08 ILT |
364 | 4 * 1024, // common_pagesize (overridable by -z common-page-size) |
365 | elfcpp::SHN_UNDEF, // small_common_shndx | |
366 | elfcpp::SHN_UNDEF, // large_common_shndx | |
367 | 0, // small_common_section_flags | |
05a352e6 DK |
368 | 0, // large_common_section_flags |
369 | NULL, // attributes_section | |
370 | NULL // attributes_vendor | |
42cacb20 DE |
371 | }; |
372 | ||
373 | template<> | |
374 | Target::Target_info Target_powerpc<64, true>::powerpc_info = | |
375 | { | |
376 | 64, // size | |
377 | true, // is_big_endian | |
378 | elfcpp::EM_PPC64, // machine_code | |
379 | false, // has_make_symbol | |
380 | false, // has_resolve | |
381 | false, // has_code_fill | |
382 | true, // is_default_stack_executable | |
383 | '\0', // wrap_char | |
384 | "/usr/lib/ld.so.1", // dynamic_linker | |
385 | 0x10000000, // default_text_segment_address | |
386 | 64 * 1024, // abi_pagesize (overridable by -z max-page-size) | |
8a5e3e08 ILT |
387 | 8 * 1024, // common_pagesize (overridable by -z common-page-size) |
388 | elfcpp::SHN_UNDEF, // small_common_shndx | |
389 | elfcpp::SHN_UNDEF, // large_common_shndx | |
390 | 0, // small_common_section_flags | |
05a352e6 DK |
391 | 0, // large_common_section_flags |
392 | NULL, // attributes_section | |
393 | NULL // attributes_vendor | |
42cacb20 DE |
394 | }; |
395 | ||
396 | template<> | |
397 | Target::Target_info Target_powerpc<64, false>::powerpc_info = | |
398 | { | |
399 | 64, // size | |
400 | false, // is_big_endian | |
401 | elfcpp::EM_PPC64, // machine_code | |
402 | false, // has_make_symbol | |
403 | false, // has_resolve | |
404 | false, // has_code_fill | |
405 | true, // is_default_stack_executable | |
406 | '\0', // wrap_char | |
407 | "/usr/lib/ld.so.1", // dynamic_linker | |
408 | 0x10000000, // default_text_segment_address | |
409 | 64 * 1024, // abi_pagesize (overridable by -z max-page-size) | |
8a5e3e08 ILT |
410 | 8 * 1024, // common_pagesize (overridable by -z common-page-size) |
411 | elfcpp::SHN_UNDEF, // small_common_shndx | |
412 | elfcpp::SHN_UNDEF, // large_common_shndx | |
413 | 0, // small_common_section_flags | |
05a352e6 DK |
414 | 0, // large_common_section_flags |
415 | NULL, // attributes_section | |
416 | NULL // attributes_vendor | |
42cacb20 DE |
417 | }; |
418 | ||
419 | template<int size, bool big_endian> | |
420 | class Powerpc_relocate_functions | |
421 | { | |
422 | private: | |
423 | // Do a simple relocation with the addend in the relocation. | |
424 | template<int valsize> | |
425 | static inline void | |
426 | rela(unsigned char* view, | |
427 | unsigned int right_shift, | |
428 | elfcpp::Elf_Xword dst_mask, | |
429 | typename elfcpp::Swap<size, big_endian>::Valtype value, | |
430 | typename elfcpp::Swap<size, big_endian>::Valtype addend) | |
431 | { | |
432 | typedef typename elfcpp::Swap<valsize, big_endian>::Valtype Valtype; | |
433 | Valtype* wv = reinterpret_cast<Valtype*>(view); | |
434 | Valtype val = elfcpp::Swap<valsize, big_endian>::readval(wv); | |
435 | Valtype reloc = ((value + addend) >> right_shift); | |
436 | ||
437 | val &= ~dst_mask; | |
438 | reloc &= dst_mask; | |
439 | ||
440 | elfcpp::Swap<valsize, big_endian>::writeval(wv, val | reloc); | |
441 | } | |
442 | ||
443 | // Do a simple relocation using a symbol value with the addend in | |
444 | // the relocation. | |
445 | template<int valsize> | |
446 | static inline void | |
447 | rela(unsigned char* view, | |
448 | unsigned int right_shift, | |
449 | elfcpp::Elf_Xword dst_mask, | |
450 | const Sized_relobj<size, big_endian>* object, | |
451 | const Symbol_value<size>* psymval, | |
452 | typename elfcpp::Swap<valsize, big_endian>::Valtype addend) | |
453 | { | |
454 | typedef typename elfcpp::Swap<valsize, big_endian>::Valtype Valtype; | |
455 | Valtype* wv = reinterpret_cast<Valtype*>(view); | |
456 | Valtype val = elfcpp::Swap<valsize, big_endian>::readval(wv); | |
457 | Valtype reloc = (psymval->value(object, addend) >> right_shift); | |
458 | ||
459 | val &= ~dst_mask; | |
460 | reloc &= dst_mask; | |
461 | ||
462 | elfcpp::Swap<valsize, big_endian>::writeval(wv, val | reloc); | |
463 | } | |
464 | ||
465 | // Do a simple relocation using a symbol value with the addend in | |
466 | // the relocation, unaligned. | |
467 | template<int valsize> | |
468 | static inline void | |
469 | rela_ua(unsigned char* view, unsigned int right_shift, | |
470 | elfcpp::Elf_Xword dst_mask, | |
471 | const Sized_relobj<size, big_endian>* object, | |
472 | const Symbol_value<size>* psymval, | |
473 | typename elfcpp::Swap<size, big_endian>::Valtype addend) | |
474 | { | |
475 | typedef typename elfcpp::Swap_unaligned<valsize, | |
476 | big_endian>::Valtype Valtype; | |
477 | unsigned char* wv = view; | |
478 | Valtype val = elfcpp::Swap_unaligned<valsize, big_endian>::readval(wv); | |
479 | Valtype reloc = (psymval->value(object, addend) >> right_shift); | |
480 | ||
481 | val &= ~dst_mask; | |
482 | reloc &= dst_mask; | |
483 | ||
484 | elfcpp::Swap_unaligned<valsize, big_endian>::writeval(wv, val | reloc); | |
485 | } | |
486 | ||
487 | // Do a simple PC relative relocation with a Symbol_value with the | |
488 | // addend in the relocation. | |
489 | template<int valsize> | |
490 | static inline void | |
491 | pcrela(unsigned char* view, unsigned int right_shift, | |
492 | elfcpp::Elf_Xword dst_mask, | |
493 | const Sized_relobj<size, big_endian>* object, | |
494 | const Symbol_value<size>* psymval, | |
495 | typename elfcpp::Swap<size, big_endian>::Valtype addend, | |
496 | typename elfcpp::Elf_types<size>::Elf_Addr address) | |
497 | { | |
498 | typedef typename elfcpp::Swap<valsize, big_endian>::Valtype Valtype; | |
499 | Valtype* wv = reinterpret_cast<Valtype*>(view); | |
500 | Valtype val = elfcpp::Swap<valsize, big_endian>::readval(wv); | |
501 | Valtype reloc = ((psymval->value(object, addend) - address) | |
502 | >> right_shift); | |
503 | ||
504 | val &= ~dst_mask; | |
505 | reloc &= dst_mask; | |
506 | ||
507 | elfcpp::Swap<valsize, big_endian>::writeval(wv, val | reloc); | |
508 | } | |
509 | ||
510 | template<int valsize> | |
511 | static inline void | |
512 | pcrela_unaligned(unsigned char* view, | |
513 | const Sized_relobj<size, big_endian>* object, | |
514 | const Symbol_value<size>* psymval, | |
515 | typename elfcpp::Swap<size, big_endian>::Valtype addend, | |
516 | typename elfcpp::Elf_types<size>::Elf_Addr address) | |
517 | { | |
518 | typedef typename elfcpp::Swap_unaligned<valsize, | |
519 | big_endian>::Valtype Valtype; | |
520 | unsigned char* wv = view; | |
521 | Valtype reloc = (psymval->value(object, addend) - address); | |
522 | ||
523 | elfcpp::Swap_unaligned<valsize, big_endian>::writeval(wv, reloc); | |
524 | } | |
525 | ||
526 | typedef Powerpc_relocate_functions<size, big_endian> This; | |
527 | typedef Relocate_functions<size, big_endian> This_reloc; | |
528 | public: | |
529 | // R_POWERPC_REL32: (Symbol + Addend - Address) | |
530 | static inline void | |
531 | rel32(unsigned char* view, | |
532 | const Sized_relobj<size, big_endian>* object, | |
533 | const Symbol_value<size>* psymval, | |
534 | typename elfcpp::Elf_types<size>::Elf_Addr addend, | |
535 | typename elfcpp::Elf_types<size>::Elf_Addr address) | |
536 | { This_reloc::pcrela32(view, object, psymval, addend, address); } | |
537 | ||
538 | // R_POWERPC_REL24: (Symbol + Addend - Address) & 0x3fffffc | |
539 | static inline void | |
540 | rel24(unsigned char* view, | |
541 | const Sized_relobj<size, big_endian>* object, | |
542 | const Symbol_value<size>* psymval, | |
543 | typename elfcpp::Elf_types<size>::Elf_Addr addend, | |
544 | typename elfcpp::Elf_types<size>::Elf_Addr address) | |
545 | { | |
546 | This::template pcrela<32>(view, 0, 0x03fffffc, object, | |
547 | psymval, addend, address); | |
548 | } | |
549 | ||
550 | // R_POWERPC_REL14: (Symbol + Addend - Address) & 0xfffc | |
551 | static inline void | |
552 | rel14(unsigned char* view, | |
553 | const Sized_relobj<size, big_endian>* object, | |
554 | const Symbol_value<size>* psymval, | |
555 | typename elfcpp::Elf_types<size>::Elf_Addr addend, | |
556 | typename elfcpp::Elf_types<size>::Elf_Addr address) | |
557 | { | |
558 | This::template pcrela<32>(view, 0, 0x0000fffc, object, | |
559 | psymval, addend, address); | |
560 | } | |
561 | ||
562 | // R_POWERPC_ADDR16: (Symbol + Addend) & 0xffff | |
563 | static inline void | |
564 | addr16(unsigned char* view, | |
565 | typename elfcpp::Elf_types<size>::Elf_Addr value, | |
566 | typename elfcpp::Elf_types<size>::Elf_Addr addend) | |
567 | { This_reloc::rela16(view, value, addend); } | |
568 | ||
569 | static inline void | |
570 | addr16(unsigned char* view, | |
571 | const Sized_relobj<size, big_endian>* object, | |
572 | const Symbol_value<size>* psymval, | |
573 | typename elfcpp::Elf_types<size>::Elf_Addr addend) | |
574 | { This_reloc::rela16(view, object, psymval, addend); } | |
575 | ||
576 | // R_POWERPC_ADDR16_DS: (Symbol + Addend) & 0xfffc | |
577 | static inline void | |
578 | addr16_ds(unsigned char* view, | |
579 | typename elfcpp::Elf_types<size>::Elf_Addr value, | |
580 | typename elfcpp::Elf_types<size>::Elf_Addr addend) | |
581 | { | |
582 | This::template rela<16>(view, 0, 0xfffc, value, addend); | |
583 | } | |
584 | ||
585 | // R_POWERPC_ADDR16_LO: (Symbol + Addend) & 0xffff | |
586 | static inline void | |
587 | addr16_lo(unsigned char* view, | |
588 | typename elfcpp::Elf_types<size>::Elf_Addr value, | |
589 | typename elfcpp::Elf_types<size>::Elf_Addr addend) | |
590 | { This_reloc::rela16(view, value, addend); } | |
591 | ||
592 | static inline void | |
593 | addr16_lo(unsigned char* view, | |
594 | const Sized_relobj<size, big_endian>* object, | |
595 | const Symbol_value<size>* psymval, | |
596 | typename elfcpp::Elf_types<size>::Elf_Addr addend) | |
597 | { This_reloc::rela16(view, object, psymval, addend); } | |
598 | ||
599 | // R_POWERPC_ADDR16_HI: ((Symbol + Addend) >> 16) & 0xffff | |
600 | static inline void | |
601 | addr16_hi(unsigned char* view, | |
602 | typename elfcpp::Elf_types<size>::Elf_Addr value, | |
603 | typename elfcpp::Elf_types<size>::Elf_Addr addend) | |
604 | { | |
605 | This::template rela<16>(view, 16, 0xffff, value, addend); | |
606 | } | |
607 | ||
608 | static inline void | |
609 | addr16_hi(unsigned char* view, | |
610 | const Sized_relobj<size, big_endian>* object, | |
611 | const Symbol_value<size>* psymval, | |
612 | typename elfcpp::Elf_types<size>::Elf_Addr addend) | |
613 | { | |
614 | This::template rela<16>(view, 16, 0xffff, object, psymval, addend); | |
615 | } | |
616 | ||
617 | // R_POWERPC_ADDR16_HA: Same as R_POWERPC_ADDR16_HI except that if the | |
618 | // final value of the low 16 bits of the | |
619 | // relocation is negative, add one. | |
620 | static inline void | |
621 | addr16_ha(unsigned char* view, | |
622 | typename elfcpp::Elf_types<size>::Elf_Addr value, | |
623 | typename elfcpp::Elf_types<size>::Elf_Addr addend) | |
624 | { | |
42cacb20 DE |
625 | typename elfcpp::Elf_types<size>::Elf_Addr reloc; |
626 | ||
627 | reloc = value + addend; | |
628 | ||
629 | if (reloc & 0x8000) | |
630 | reloc += 0x10000; | |
631 | reloc >>= 16; | |
632 | ||
e6fde208 | 633 | elfcpp::Swap<16, big_endian>::writeval(view, reloc); |
42cacb20 DE |
634 | } |
635 | ||
636 | static inline void | |
637 | addr16_ha(unsigned char* view, | |
638 | const Sized_relobj<size, big_endian>* object, | |
639 | const Symbol_value<size>* psymval, | |
640 | typename elfcpp::Elf_types<size>::Elf_Addr addend) | |
641 | { | |
42cacb20 DE |
642 | typename elfcpp::Elf_types<size>::Elf_Addr reloc; |
643 | ||
644 | reloc = psymval->value(object, addend); | |
645 | ||
646 | if (reloc & 0x8000) | |
647 | reloc += 0x10000; | |
648 | reloc >>= 16; | |
649 | ||
e6fde208 | 650 | elfcpp::Swap<16, big_endian>::writeval(view, reloc); |
42cacb20 DE |
651 | } |
652 | ||
653 | // R_PPC_REL16: (Symbol + Addend - Address) & 0xffff | |
654 | static inline void | |
655 | rel16(unsigned char* view, | |
656 | const Sized_relobj<size, big_endian>* object, | |
657 | const Symbol_value<size>* psymval, | |
658 | typename elfcpp::Elf_types<size>::Elf_Addr addend, | |
659 | typename elfcpp::Elf_types<size>::Elf_Addr address) | |
660 | { This_reloc::pcrela16(view, object, psymval, addend, address); } | |
661 | ||
662 | // R_PPC_REL16_LO: (Symbol + Addend - Address) & 0xffff | |
663 | static inline void | |
664 | rel16_lo(unsigned char* view, | |
665 | const Sized_relobj<size, big_endian>* object, | |
666 | const Symbol_value<size>* psymval, | |
667 | typename elfcpp::Elf_types<size>::Elf_Addr addend, | |
668 | typename elfcpp::Elf_types<size>::Elf_Addr address) | |
669 | { This_reloc::pcrela16(view, object, psymval, addend, address); } | |
670 | ||
671 | // R_PPC_REL16_HI: ((Symbol + Addend - Address) >> 16) & 0xffff | |
672 | static inline void | |
673 | rel16_hi(unsigned char* view, | |
674 | const Sized_relobj<size, big_endian>* object, | |
675 | const Symbol_value<size>* psymval, | |
676 | typename elfcpp::Elf_types<size>::Elf_Addr addend, | |
677 | typename elfcpp::Elf_types<size>::Elf_Addr address) | |
678 | { | |
679 | This::template pcrela<16>(view, 16, 0xffff, object, | |
680 | psymval, addend, address); | |
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, | |
688 | const Sized_relobj<size, big_endian>* object, | |
689 | const Symbol_value<size>* psymval, | |
690 | typename elfcpp::Elf_types<size>::Elf_Addr addend, | |
691 | typename elfcpp::Elf_types<size>::Elf_Addr address) | |
692 | { | |
42cacb20 DE |
693 | typename elfcpp::Elf_types<size>::Elf_Addr reloc; |
694 | ||
695 | reloc = (psymval->value(object, addend) - address); | |
696 | if (reloc & 0x8000) | |
697 | reloc += 0x10000; | |
698 | reloc >>= 16; | |
699 | ||
83d22aa8 | 700 | elfcpp::Swap<16, big_endian>::writeval(view, reloc); |
42cacb20 DE |
701 | } |
702 | }; | |
703 | ||
704 | // Get the GOT section, creating it if necessary. | |
705 | ||
706 | template<int size, bool big_endian> | |
707 | Output_data_got<size, big_endian>* | |
708 | Target_powerpc<size, big_endian>::got_section(Symbol_table* symtab, | |
709 | Layout* layout) | |
710 | { | |
711 | if (this->got_ == NULL) | |
712 | { | |
713 | gold_assert(symtab != NULL && layout != NULL); | |
714 | ||
715 | this->got_ = new Output_data_got<size, big_endian>(); | |
716 | ||
717 | layout->add_output_section_data(".got", elfcpp::SHT_PROGBITS, | |
718 | elfcpp::SHF_ALLOC | elfcpp::SHF_WRITE, | |
f5c870d2 | 719 | this->got_, false); |
42cacb20 DE |
720 | |
721 | // Create the GOT2 or TOC in the .got section. | |
722 | if (size == 32) | |
723 | { | |
724 | this->got2_ = new Output_data_space(4, "** GOT2"); | |
725 | layout->add_output_section_data(".got2", elfcpp::SHT_PROGBITS, | |
726 | elfcpp::SHF_ALLOC | |
727 | | elfcpp::SHF_WRITE, | |
f5c870d2 | 728 | this->got2_, false); |
42cacb20 DE |
729 | } |
730 | else | |
731 | { | |
732 | this->toc_ = new Output_data_space(8, "** TOC"); | |
733 | layout->add_output_section_data(".toc", elfcpp::SHT_PROGBITS, | |
734 | elfcpp::SHF_ALLOC | |
735 | | elfcpp::SHF_WRITE, | |
f5c870d2 | 736 | this->toc_, false); |
42cacb20 DE |
737 | } |
738 | ||
739 | // Define _GLOBAL_OFFSET_TABLE_ at the start of the .got section. | |
740 | symtab->define_in_output_data("_GLOBAL_OFFSET_TABLE_", NULL, | |
741 | this->got_, | |
742 | 0, 0, elfcpp::STT_OBJECT, | |
743 | elfcpp::STB_LOCAL, | |
744 | elfcpp::STV_HIDDEN, 0, | |
745 | false, false); | |
746 | } | |
747 | ||
748 | return this->got_; | |
749 | } | |
750 | ||
751 | // Get the dynamic reloc section, creating it if necessary. | |
752 | ||
753 | template<int size, bool big_endian> | |
754 | typename Target_powerpc<size, big_endian>::Reloc_section* | |
755 | Target_powerpc<size, big_endian>::rela_dyn_section(Layout* layout) | |
756 | { | |
757 | if (this->rela_dyn_ == NULL) | |
758 | { | |
759 | gold_assert(layout != NULL); | |
760 | this->rela_dyn_ = new Reloc_section(parameters->options().combreloc()); | |
761 | layout->add_output_section_data(".rela.dyn", elfcpp::SHT_RELA, | |
f5c870d2 | 762 | elfcpp::SHF_ALLOC, this->rela_dyn_, true); |
42cacb20 DE |
763 | } |
764 | return this->rela_dyn_; | |
765 | } | |
766 | ||
767 | // A class to handle the PLT data. | |
768 | ||
769 | template<int size, bool big_endian> | |
770 | class Output_data_plt_powerpc : public Output_section_data | |
771 | { | |
772 | public: | |
773 | typedef Output_data_reloc<elfcpp::SHT_RELA, true, | |
774 | size, big_endian> Reloc_section; | |
775 | ||
776 | Output_data_plt_powerpc(Layout*); | |
777 | ||
778 | // Add an entry to the PLT. | |
779 | void add_entry(Symbol* gsym); | |
780 | ||
781 | // Return the .rela.plt section data. | |
782 | const Reloc_section* rel_plt() const | |
783 | { | |
784 | return this->rel_; | |
785 | } | |
786 | ||
787 | protected: | |
788 | void do_adjust_output_section(Output_section* os); | |
789 | ||
790 | private: | |
791 | // The size of an entry in the PLT. | |
792 | static const int base_plt_entry_size = (size == 32 ? 16 : 24); | |
793 | ||
794 | // Set the final size. | |
795 | void | |
796 | set_final_data_size() | |
797 | { | |
798 | unsigned int full_count = this->count_ + 4; | |
799 | ||
800 | this->set_data_size(full_count * base_plt_entry_size); | |
801 | } | |
802 | ||
803 | // Write out the PLT data. | |
804 | void | |
805 | do_write(Output_file*); | |
806 | ||
807 | // The reloc section. | |
808 | Reloc_section* rel_; | |
809 | // The number of PLT entries. | |
810 | unsigned int count_; | |
811 | }; | |
812 | ||
813 | // Create the PLT section. The ordinary .got section is an argument, | |
814 | // since we need to refer to the start. | |
815 | ||
816 | template<int size, bool big_endian> | |
817 | Output_data_plt_powerpc<size, big_endian>::Output_data_plt_powerpc(Layout* layout) | |
818 | : Output_section_data(size == 32 ? 4 : 8), count_(0) | |
819 | { | |
820 | this->rel_ = new Reloc_section(false); | |
821 | layout->add_output_section_data(".rela.plt", elfcpp::SHT_RELA, | |
f5c870d2 | 822 | elfcpp::SHF_ALLOC, this->rel_, true); |
42cacb20 DE |
823 | } |
824 | ||
825 | template<int size, bool big_endian> | |
826 | void | |
827 | Output_data_plt_powerpc<size, big_endian>::do_adjust_output_section(Output_section* os) | |
828 | { | |
829 | os->set_entsize(0); | |
830 | } | |
831 | ||
832 | // Add an entry to the PLT. | |
833 | ||
834 | template<int size, bool big_endian> | |
835 | void | |
836 | Output_data_plt_powerpc<size, big_endian>::add_entry(Symbol* gsym) | |
837 | { | |
838 | gold_assert(!gsym->has_plt_offset()); | |
839 | unsigned int index = this->count_+ + 4; | |
840 | section_offset_type plt_offset; | |
841 | ||
842 | if (index < 8192) | |
843 | plt_offset = index * base_plt_entry_size; | |
844 | else | |
845 | gold_unreachable(); | |
846 | ||
847 | gsym->set_plt_offset(plt_offset); | |
848 | ||
849 | ++this->count_; | |
850 | ||
851 | gsym->set_needs_dynsym_entry(); | |
852 | this->rel_->add_global(gsym, elfcpp::R_POWERPC_JMP_SLOT, this, | |
853 | plt_offset, 0); | |
854 | } | |
855 | ||
856 | static const unsigned int addis_11_11 = 0x3d6b0000; | |
857 | static const unsigned int addis_11_30 = 0x3d7e0000; | |
858 | static const unsigned int addis_12_12 = 0x3d8c0000; | |
859 | static const unsigned int addi_11_11 = 0x396b0000; | |
860 | static const unsigned int add_0_11_11 = 0x7c0b5a14; | |
861 | static const unsigned int add_11_0_11 = 0x7d605a14; | |
862 | static const unsigned int b = 0x48000000; | |
863 | static const unsigned int bcl_20_31 = 0x429f0005; | |
864 | static const unsigned int bctr = 0x4e800420; | |
865 | static const unsigned int lis_11 = 0x3d600000; | |
866 | static const unsigned int lis_12 = 0x3d800000; | |
867 | static const unsigned int lwzu_0_12 = 0x840c0000; | |
868 | static const unsigned int lwz_0_12 = 0x800c0000; | |
869 | static const unsigned int lwz_11_11 = 0x816b0000; | |
870 | static const unsigned int lwz_11_30 = 0x817e0000; | |
871 | static const unsigned int lwz_12_12 = 0x818c0000; | |
872 | static const unsigned int mflr_0 = 0x7c0802a6; | |
873 | static const unsigned int mflr_12 = 0x7d8802a6; | |
874 | static const unsigned int mtctr_0 = 0x7c0903a6; | |
875 | static const unsigned int mtctr_11 = 0x7d6903a6; | |
876 | static const unsigned int mtlr_0 = 0x7c0803a6; | |
877 | static const unsigned int nop = 0x60000000; | |
878 | static const unsigned int sub_11_11_12 = 0x7d6c5850; | |
879 | ||
880 | static const unsigned int addis_r12_r2 = 0x3d820000; /* addis %r12,%r2,xxx@ha */ | |
881 | static const unsigned int std_r2_40r1 = 0xf8410028; /* std %r2,40(%r1) */ | |
882 | static const unsigned int ld_r11_0r12 = 0xe96c0000; /* ld %r11,xxx+0@l(%r12) */ | |
883 | static const unsigned int ld_r2_0r12 = 0xe84c0000; /* ld %r2,xxx+8@l(%r12) */ | |
884 | /* ld %r11,xxx+16@l(%r12) */ | |
885 | ||
886 | ||
887 | // Write out the PLT. | |
888 | ||
889 | template<int size, bool big_endian> | |
890 | void | |
891 | Output_data_plt_powerpc<size, big_endian>::do_write(Output_file* of) | |
892 | { | |
893 | const off_t offset = this->offset(); | |
894 | const section_size_type oview_size = | |
895 | convert_to_section_size_type(this->data_size()); | |
896 | unsigned char* const oview = of->get_output_view(offset, oview_size); | |
897 | unsigned char* pov = oview; | |
898 | ||
899 | memset(pov, 0, base_plt_entry_size * 4); | |
900 | pov += base_plt_entry_size * 4; | |
901 | ||
902 | unsigned int plt_offset = base_plt_entry_size * 4; | |
903 | const unsigned int count = this->count_; | |
904 | ||
905 | if (size == 64) | |
906 | { | |
907 | for (unsigned int i = 0; i < count; i++) | |
908 | { | |
909 | } | |
910 | } | |
911 | else | |
912 | { | |
913 | for (unsigned int i = 0; i < count; i++) | |
914 | { | |
915 | elfcpp::Swap<32, true>::writeval(pov + 0x00, | |
916 | lwz_11_30 + plt_offset); | |
917 | elfcpp::Swap<32, true>::writeval(pov + 0x04, mtctr_11); | |
918 | elfcpp::Swap<32, true>::writeval(pov + 0x08, bctr); | |
ce3ac18a | 919 | elfcpp::Swap<32, true>::writeval(pov + 0x0c, nop); |
42cacb20 DE |
920 | pov += base_plt_entry_size; |
921 | plt_offset += base_plt_entry_size; | |
922 | } | |
923 | } | |
924 | ||
925 | gold_assert(static_cast<section_size_type>(pov - oview) == oview_size); | |
926 | ||
927 | of->write_output_view(offset, oview_size, oview); | |
928 | } | |
929 | ||
930 | // Create a PLT entry for a global symbol. | |
931 | ||
932 | template<int size, bool big_endian> | |
933 | void | |
934 | Target_powerpc<size, big_endian>::make_plt_entry(Symbol_table* symtab, | |
935 | Layout* layout, | |
936 | Symbol* gsym) | |
937 | { | |
938 | if (gsym->has_plt_offset()) | |
939 | return; | |
940 | ||
941 | if (this->plt_ == NULL) | |
942 | { | |
943 | // Create the GOT section first. | |
944 | this->got_section(symtab, layout); | |
945 | ||
946 | this->plt_ = new Output_data_plt_powerpc<size, big_endian>(layout); | |
947 | layout->add_output_section_data(".plt", elfcpp::SHT_PROGBITS, | |
948 | (elfcpp::SHF_ALLOC | |
949 | | elfcpp::SHF_EXECINSTR | |
950 | | elfcpp::SHF_WRITE), | |
f5c870d2 | 951 | this->plt_, false); |
42cacb20 DE |
952 | |
953 | // Define _PROCEDURE_LINKAGE_TABLE_ at the start of the .plt section. | |
954 | symtab->define_in_output_data("_PROCEDURE_LINKAGE_TABLE_", NULL, | |
955 | this->plt_, | |
956 | 0, 0, elfcpp::STT_OBJECT, | |
957 | elfcpp::STB_LOCAL, | |
958 | elfcpp::STV_HIDDEN, 0, | |
959 | false, false); | |
960 | } | |
961 | ||
962 | this->plt_->add_entry(gsym); | |
963 | } | |
964 | ||
965 | // Create a GOT entry for the TLS module index. | |
966 | ||
967 | template<int size, bool big_endian> | |
968 | unsigned int | |
969 | Target_powerpc<size, big_endian>::got_mod_index_entry(Symbol_table* symtab, | |
970 | Layout* layout, | |
971 | Sized_relobj<size, big_endian>* object) | |
972 | { | |
973 | if (this->got_mod_index_offset_ == -1U) | |
974 | { | |
975 | gold_assert(symtab != NULL && layout != NULL && object != NULL); | |
976 | Reloc_section* rela_dyn = this->rela_dyn_section(layout); | |
977 | Output_data_got<size, big_endian>* got; | |
978 | unsigned int got_offset; | |
979 | ||
980 | got = this->got_section(symtab, layout); | |
981 | got_offset = got->add_constant(0); | |
982 | rela_dyn->add_local(object, 0, elfcpp::R_POWERPC_DTPMOD, got, | |
983 | got_offset, 0); | |
984 | got->add_constant(0); | |
985 | this->got_mod_index_offset_ = got_offset; | |
986 | } | |
987 | return this->got_mod_index_offset_; | |
988 | } | |
989 | ||
990 | // Optimize the TLS relocation type based on what we know about the | |
991 | // symbol. IS_FINAL is true if the final address of this symbol is | |
992 | // known at link time. | |
993 | ||
994 | static tls::Tls_optimization | |
995 | optimize_tls_reloc(bool /* is_final */, int r_type) | |
996 | { | |
997 | // If we are generating a shared library, then we can't do anything | |
998 | // in the linker. | |
999 | if (parameters->options().shared()) | |
1000 | return tls::TLSOPT_NONE; | |
1001 | switch (r_type) | |
1002 | { | |
1003 | // XXX | |
1004 | default: | |
1005 | gold_unreachable(); | |
1006 | } | |
1007 | } | |
1008 | ||
1009 | // Report an unsupported relocation against a local symbol. | |
1010 | ||
1011 | template<int size, bool big_endian> | |
1012 | void | |
1013 | Target_powerpc<size, big_endian>::Scan::unsupported_reloc_local( | |
1014 | Sized_relobj<size, big_endian>* object, | |
1015 | unsigned int r_type) | |
1016 | { | |
1017 | gold_error(_("%s: unsupported reloc %u against local symbol"), | |
1018 | object->name().c_str(), r_type); | |
1019 | } | |
1020 | ||
1021 | // We are about to emit a dynamic relocation of type R_TYPE. If the | |
1022 | // dynamic linker does not support it, issue an error. | |
1023 | ||
1024 | template<int size, bool big_endian> | |
1025 | void | |
1026 | Target_powerpc<size, big_endian>::Scan::check_non_pic(Relobj* object, | |
1027 | unsigned int r_type) | |
1028 | { | |
1029 | gold_assert(r_type != elfcpp::R_POWERPC_NONE); | |
1030 | ||
1031 | // These are the relocation types supported by glibc for both 32-bit | |
1032 | // and 64-bit powerpc. | |
1033 | switch (r_type) | |
1034 | { | |
1035 | case elfcpp::R_POWERPC_RELATIVE: | |
1036 | case elfcpp::R_POWERPC_GLOB_DAT: | |
1037 | case elfcpp::R_POWERPC_DTPMOD: | |
1038 | case elfcpp::R_POWERPC_DTPREL: | |
1039 | case elfcpp::R_POWERPC_TPREL: | |
1040 | case elfcpp::R_POWERPC_JMP_SLOT: | |
1041 | case elfcpp::R_POWERPC_COPY: | |
1042 | case elfcpp::R_POWERPC_ADDR32: | |
1043 | case elfcpp::R_POWERPC_ADDR24: | |
1044 | case elfcpp::R_POWERPC_REL24: | |
1045 | return; | |
1046 | ||
1047 | default: | |
1048 | break; | |
1049 | } | |
1050 | ||
1051 | if (size == 64) | |
1052 | { | |
1053 | switch (r_type) | |
1054 | { | |
1055 | // These are the relocation types supported only on 64-bit. | |
1056 | case elfcpp::R_PPC64_ADDR64: | |
1057 | case elfcpp::R_PPC64_TPREL16_LO_DS: | |
1058 | case elfcpp::R_PPC64_TPREL16_DS: | |
1059 | case elfcpp::R_POWERPC_TPREL16: | |
1060 | case elfcpp::R_POWERPC_TPREL16_LO: | |
1061 | case elfcpp::R_POWERPC_TPREL16_HI: | |
1062 | case elfcpp::R_POWERPC_TPREL16_HA: | |
1063 | case elfcpp::R_PPC64_TPREL16_HIGHER: | |
1064 | case elfcpp::R_PPC64_TPREL16_HIGHEST: | |
1065 | case elfcpp::R_PPC64_TPREL16_HIGHERA: | |
1066 | case elfcpp::R_PPC64_TPREL16_HIGHESTA: | |
1067 | case elfcpp::R_PPC64_ADDR16_LO_DS: | |
1068 | case elfcpp::R_POWERPC_ADDR16_LO: | |
1069 | case elfcpp::R_POWERPC_ADDR16_HI: | |
1070 | case elfcpp::R_POWERPC_ADDR16_HA: | |
1071 | case elfcpp::R_POWERPC_ADDR30: | |
1072 | case elfcpp::R_PPC64_UADDR64: | |
1073 | case elfcpp::R_POWERPC_UADDR32: | |
1074 | case elfcpp::R_POWERPC_ADDR16: | |
1075 | case elfcpp::R_POWERPC_UADDR16: | |
1076 | case elfcpp::R_PPC64_ADDR16_DS: | |
1077 | case elfcpp::R_PPC64_ADDR16_HIGHER: | |
1078 | case elfcpp::R_PPC64_ADDR16_HIGHEST: | |
1079 | case elfcpp::R_PPC64_ADDR16_HIGHERA: | |
1080 | case elfcpp::R_PPC64_ADDR16_HIGHESTA: | |
1081 | case elfcpp::R_POWERPC_ADDR14_BRTAKEN: | |
1082 | case elfcpp::R_POWERPC_ADDR14_BRNTAKEN: | |
1083 | case elfcpp::R_POWERPC_REL32: | |
1084 | case elfcpp::R_PPC64_REL64: | |
1085 | return; | |
1086 | ||
1087 | default: | |
1088 | break; | |
1089 | } | |
1090 | } | |
1091 | else | |
1092 | { | |
1093 | switch (r_type) | |
1094 | { | |
1095 | // These are the relocation types supported only on 32-bit. | |
1096 | ||
1097 | default: | |
1098 | break; | |
1099 | } | |
1100 | } | |
1101 | ||
1102 | // This prevents us from issuing more than one error per reloc | |
1103 | // section. But we can still wind up issuing more than one | |
1104 | // error per object file. | |
1105 | if (this->issued_non_pic_error_) | |
1106 | return; | |
33aea2fd | 1107 | gold_assert(parameters->options().output_is_position_independent()); |
42cacb20 DE |
1108 | object->error(_("requires unsupported dynamic reloc; " |
1109 | "recompile with -fPIC")); | |
1110 | this->issued_non_pic_error_ = true; | |
1111 | return; | |
1112 | } | |
1113 | ||
1114 | // Scan a relocation for a local symbol. | |
1115 | ||
1116 | template<int size, bool big_endian> | |
1117 | inline void | |
1118 | Target_powerpc<size, big_endian>::Scan::local( | |
42cacb20 DE |
1119 | Symbol_table* symtab, |
1120 | Layout* layout, | |
1121 | Target_powerpc<size, big_endian>* target, | |
1122 | Sized_relobj<size, big_endian>* object, | |
1123 | unsigned int data_shndx, | |
1124 | Output_section* output_section, | |
1125 | const elfcpp::Rela<size, big_endian>& reloc, | |
1126 | unsigned int r_type, | |
1127 | const elfcpp::Sym<size, big_endian>& lsym) | |
1128 | { | |
1129 | switch (r_type) | |
1130 | { | |
1131 | case elfcpp::R_POWERPC_NONE: | |
1132 | case elfcpp::R_POWERPC_GNU_VTINHERIT: | |
1133 | case elfcpp::R_POWERPC_GNU_VTENTRY: | |
1134 | break; | |
1135 | ||
1136 | case elfcpp::R_PPC64_ADDR64: | |
1137 | case elfcpp::R_POWERPC_ADDR32: | |
1138 | case elfcpp::R_POWERPC_ADDR16_HA: | |
1139 | case elfcpp::R_POWERPC_ADDR16_LO: | |
1140 | // If building a shared library (or a position-independent | |
1141 | // executable), we need to create a dynamic relocation for | |
1142 | // this location. | |
1143 | if (parameters->options().output_is_position_independent()) | |
1144 | { | |
1145 | Reloc_section* rela_dyn = target->rela_dyn_section(layout); | |
1146 | ||
1147 | check_non_pic(object, r_type); | |
1148 | if (lsym.get_st_type() != elfcpp::STT_SECTION) | |
1149 | { | |
1150 | unsigned int r_sym = elfcpp::elf_r_sym<size>(reloc.get_r_info()); | |
1151 | rela_dyn->add_local(object, r_sym, r_type, output_section, | |
1152 | data_shndx, reloc.get_r_offset(), | |
1153 | reloc.get_r_addend()); | |
1154 | } | |
1155 | else | |
1156 | { | |
1157 | unsigned int r_sym = elfcpp::elf_r_sym<size>(reloc.get_r_info()); | |
1158 | gold_assert(lsym.get_st_value() == 0); | |
1159 | rela_dyn->add_local_relative(object, r_sym, r_type, | |
1160 | output_section, data_shndx, | |
1161 | reloc.get_r_offset(), | |
1162 | reloc.get_r_addend()); | |
1163 | } | |
1164 | } | |
1165 | break; | |
1166 | ||
1167 | case elfcpp::R_POWERPC_REL24: | |
1168 | case elfcpp::R_PPC_LOCAL24PC: | |
1169 | case elfcpp::R_POWERPC_REL32: | |
1170 | case elfcpp::R_PPC_REL16_LO: | |
1171 | case elfcpp::R_PPC_REL16_HA: | |
1172 | break; | |
1173 | ||
1174 | case elfcpp::R_POWERPC_GOT16: | |
1175 | case elfcpp::R_POWERPC_GOT16_LO: | |
1176 | case elfcpp::R_POWERPC_GOT16_HI: | |
1177 | case elfcpp::R_POWERPC_GOT16_HA: | |
1178 | case elfcpp::R_PPC64_TOC16: | |
1179 | case elfcpp::R_PPC64_TOC16_LO: | |
1180 | case elfcpp::R_PPC64_TOC16_HI: | |
1181 | case elfcpp::R_PPC64_TOC16_HA: | |
1182 | case elfcpp::R_PPC64_TOC16_DS: | |
1183 | case elfcpp::R_PPC64_TOC16_LO_DS: | |
1184 | { | |
1185 | // The symbol requires a GOT entry. | |
1186 | Output_data_got<size, big_endian>* got; | |
1187 | unsigned int r_sym; | |
1188 | ||
1189 | got = target->got_section(symtab, layout); | |
1190 | r_sym = elfcpp::elf_r_sym<size>(reloc.get_r_info()); | |
1191 | ||
1192 | // If we are generating a shared object, we need to add a | |
1193 | // dynamic relocation for this symbol's GOT entry. | |
1194 | if (parameters->options().output_is_position_independent()) | |
1195 | { | |
1196 | if (!object->local_has_got_offset(r_sym, GOT_TYPE_STANDARD)) | |
1197 | { | |
1198 | Reloc_section* rela_dyn = target->rela_dyn_section(layout); | |
1199 | unsigned int off; | |
1200 | ||
1201 | off = got->add_constant(0); | |
1202 | object->set_local_got_offset(r_sym, GOT_TYPE_STANDARD, off); | |
1203 | rela_dyn->add_local_relative(object, r_sym, | |
1204 | elfcpp::R_POWERPC_RELATIVE, | |
1205 | got, off, 0); | |
1206 | } | |
1207 | } | |
1208 | else | |
1209 | got->add_local(object, r_sym, GOT_TYPE_STANDARD); | |
1210 | } | |
1211 | break; | |
1212 | ||
1213 | case elfcpp::R_PPC64_TOC: | |
1214 | // We need a GOT section. | |
1215 | target->got_section(symtab, layout); | |
1216 | break; | |
1217 | ||
1218 | // These are relocations which should only be seen by the | |
1219 | // dynamic linker, and should never be seen here. | |
1220 | case elfcpp::R_POWERPC_COPY: | |
1221 | case elfcpp::R_POWERPC_GLOB_DAT: | |
1222 | case elfcpp::R_POWERPC_JMP_SLOT: | |
1223 | case elfcpp::R_POWERPC_RELATIVE: | |
1224 | case elfcpp::R_POWERPC_DTPMOD: | |
1225 | gold_error(_("%s: unexpected reloc %u in object file"), | |
1226 | object->name().c_str(), r_type); | |
1227 | break; | |
1228 | ||
1229 | default: | |
1230 | unsupported_reloc_local(object, r_type); | |
1231 | break; | |
1232 | } | |
1233 | } | |
1234 | ||
1235 | // Report an unsupported relocation against a global symbol. | |
1236 | ||
1237 | template<int size, bool big_endian> | |
1238 | void | |
1239 | Target_powerpc<size, big_endian>::Scan::unsupported_reloc_global( | |
1240 | Sized_relobj<size, big_endian>* object, | |
1241 | unsigned int r_type, | |
1242 | Symbol* gsym) | |
1243 | { | |
1244 | gold_error(_("%s: unsupported reloc %u against global symbol %s"), | |
1245 | object->name().c_str(), r_type, gsym->demangled_name().c_str()); | |
1246 | } | |
1247 | ||
1248 | // Scan a relocation for a global symbol. | |
1249 | ||
1250 | template<int size, bool big_endian> | |
1251 | inline void | |
1252 | Target_powerpc<size, big_endian>::Scan::global( | |
42cacb20 DE |
1253 | Symbol_table* symtab, |
1254 | Layout* layout, | |
1255 | Target_powerpc<size, big_endian>* target, | |
1256 | Sized_relobj<size, big_endian>* object, | |
1257 | unsigned int data_shndx, | |
1258 | Output_section* output_section, | |
1259 | const elfcpp::Rela<size, big_endian>& reloc, | |
1260 | unsigned int r_type, | |
1261 | Symbol* gsym) | |
1262 | { | |
1263 | switch (r_type) | |
1264 | { | |
1265 | case elfcpp::R_POWERPC_NONE: | |
1266 | case elfcpp::R_POWERPC_GNU_VTINHERIT: | |
1267 | case elfcpp::R_POWERPC_GNU_VTENTRY: | |
1268 | break; | |
1269 | ||
1270 | case elfcpp::R_PPC_PLTREL24: | |
1271 | // If the symbol is fully resolved, this is just a PC32 reloc. | |
1272 | // Otherwise we need a PLT entry. | |
1273 | if (gsym->final_value_is_known()) | |
1274 | break; | |
1275 | // If building a shared library, we can also skip the PLT entry | |
1276 | // if the symbol is defined in the output file and is protected | |
1277 | // or hidden. | |
1278 | if (gsym->is_defined() | |
1279 | && !gsym->is_from_dynobj() | |
1280 | && !gsym->is_preemptible()) | |
1281 | break; | |
1282 | target->make_plt_entry(symtab, layout, gsym); | |
1283 | break; | |
1284 | ||
1285 | case elfcpp::R_POWERPC_ADDR16: | |
1286 | case elfcpp::R_POWERPC_ADDR16_LO: | |
1287 | case elfcpp::R_POWERPC_ADDR16_HI: | |
1288 | case elfcpp::R_POWERPC_ADDR16_HA: | |
1289 | case elfcpp::R_POWERPC_ADDR32: | |
1290 | case elfcpp::R_PPC64_ADDR64: | |
1291 | { | |
1292 | // Make a PLT entry if necessary. | |
1293 | if (gsym->needs_plt_entry()) | |
1294 | { | |
1295 | target->make_plt_entry(symtab, layout, gsym); | |
1296 | // Since this is not a PC-relative relocation, we may be | |
1297 | // taking the address of a function. In that case we need to | |
1298 | // set the entry in the dynamic symbol table to the address of | |
1299 | // the PLT entry. | |
1300 | if (gsym->is_from_dynobj() && !parameters->options().shared()) | |
1301 | gsym->set_needs_dynsym_value(); | |
1302 | } | |
1303 | // Make a dynamic relocation if necessary. | |
1304 | if (gsym->needs_dynamic_reloc(Symbol::ABSOLUTE_REF)) | |
1305 | { | |
966d4097 | 1306 | if (gsym->may_need_copy_reloc()) |
42cacb20 DE |
1307 | { |
1308 | target->copy_reloc(symtab, layout, object, | |
1309 | data_shndx, output_section, gsym, reloc); | |
1310 | } | |
1311 | else if ((r_type == elfcpp::R_POWERPC_ADDR32 | |
1312 | || r_type == elfcpp::R_PPC64_ADDR64) | |
1313 | && gsym->can_use_relative_reloc(false)) | |
1314 | { | |
1315 | Reloc_section* rela_dyn = target->rela_dyn_section(layout); | |
1316 | rela_dyn->add_global_relative(gsym, elfcpp::R_POWERPC_RELATIVE, | |
1317 | output_section, object, | |
1318 | data_shndx, reloc.get_r_offset(), | |
1319 | reloc.get_r_addend()); | |
1320 | } | |
1321 | else | |
1322 | { | |
1323 | Reloc_section* rela_dyn = target->rela_dyn_section(layout); | |
1324 | ||
1325 | check_non_pic(object, r_type); | |
1326 | if (gsym->is_from_dynobj() | |
1327 | || gsym->is_undefined() | |
1328 | || gsym->is_preemptible()) | |
1329 | rela_dyn->add_global(gsym, r_type, output_section, | |
1330 | object, data_shndx, | |
1331 | reloc.get_r_offset(), | |
1332 | reloc.get_r_addend()); | |
1333 | else | |
1334 | rela_dyn->add_global_relative(gsym, r_type, | |
1335 | output_section, object, | |
1336 | data_shndx, | |
1337 | reloc.get_r_offset(), | |
1338 | reloc.get_r_addend()); | |
1339 | } | |
1340 | } | |
1341 | } | |
1342 | break; | |
1343 | ||
1344 | case elfcpp::R_POWERPC_REL24: | |
1345 | case elfcpp::R_PPC_LOCAL24PC: | |
1346 | case elfcpp::R_PPC_REL16: | |
1347 | case elfcpp::R_PPC_REL16_LO: | |
1348 | case elfcpp::R_PPC_REL16_HI: | |
1349 | case elfcpp::R_PPC_REL16_HA: | |
1350 | { | |
1351 | if (gsym->needs_plt_entry()) | |
1352 | target->make_plt_entry(symtab, layout, gsym); | |
1353 | // Make a dynamic relocation if necessary. | |
1354 | int flags = Symbol::NON_PIC_REF; | |
1355 | if (gsym->type() == elfcpp::STT_FUNC) | |
1356 | flags |= Symbol::FUNCTION_CALL; | |
1357 | if (gsym->needs_dynamic_reloc(flags)) | |
1358 | { | |
966d4097 | 1359 | if (gsym->may_need_copy_reloc()) |
42cacb20 DE |
1360 | { |
1361 | target->copy_reloc(symtab, layout, object, | |
1362 | data_shndx, output_section, gsym, | |
1363 | reloc); | |
1364 | } | |
1365 | else | |
1366 | { | |
1367 | Reloc_section* rela_dyn = target->rela_dyn_section(layout); | |
1368 | check_non_pic(object, r_type); | |
1369 | rela_dyn->add_global(gsym, r_type, output_section, object, | |
1370 | data_shndx, reloc.get_r_offset(), | |
1371 | reloc.get_r_addend()); | |
1372 | } | |
1373 | } | |
1374 | } | |
1375 | break; | |
1376 | ||
1377 | case elfcpp::R_POWERPC_GOT16: | |
1378 | case elfcpp::R_POWERPC_GOT16_LO: | |
1379 | case elfcpp::R_POWERPC_GOT16_HI: | |
1380 | case elfcpp::R_POWERPC_GOT16_HA: | |
1381 | case elfcpp::R_PPC64_TOC16: | |
1382 | case elfcpp::R_PPC64_TOC16_LO: | |
1383 | case elfcpp::R_PPC64_TOC16_HI: | |
1384 | case elfcpp::R_PPC64_TOC16_HA: | |
1385 | case elfcpp::R_PPC64_TOC16_DS: | |
1386 | case elfcpp::R_PPC64_TOC16_LO_DS: | |
1387 | { | |
1388 | // The symbol requires a GOT entry. | |
1389 | Output_data_got<size, big_endian>* got; | |
1390 | ||
1391 | got = target->got_section(symtab, layout); | |
1392 | if (gsym->final_value_is_known()) | |
1393 | got->add_global(gsym, GOT_TYPE_STANDARD); | |
1394 | else | |
1395 | { | |
1396 | // If this symbol is not fully resolved, we need to add a | |
1397 | // dynamic relocation for it. | |
1398 | Reloc_section* rela_dyn = target->rela_dyn_section(layout); | |
1399 | if (gsym->is_from_dynobj() | |
1400 | || gsym->is_undefined() | |
1401 | || gsym->is_preemptible()) | |
1402 | got->add_global_with_rela(gsym, GOT_TYPE_STANDARD, rela_dyn, | |
1403 | elfcpp::R_POWERPC_GLOB_DAT); | |
1404 | else if (!gsym->has_got_offset(GOT_TYPE_STANDARD)) | |
1405 | { | |
1406 | unsigned int off = got->add_constant(0); | |
1407 | ||
1408 | gsym->set_got_offset(GOT_TYPE_STANDARD, off); | |
1409 | rela_dyn->add_global_relative(gsym, elfcpp::R_POWERPC_RELATIVE, | |
1410 | got, off, 0); | |
1411 | } | |
1412 | } | |
1413 | } | |
1414 | break; | |
1415 | ||
1416 | case elfcpp::R_PPC64_TOC: | |
1417 | // We need a GOT section. | |
1418 | target->got_section(symtab, layout); | |
1419 | break; | |
1420 | ||
1421 | case elfcpp::R_POWERPC_GOT_TPREL16: | |
1422 | case elfcpp::R_POWERPC_TLS: | |
1423 | // XXX TLS | |
1424 | break; | |
1425 | ||
1426 | // These are relocations which should only be seen by the | |
1427 | // dynamic linker, and should never be seen here. | |
1428 | case elfcpp::R_POWERPC_COPY: | |
1429 | case elfcpp::R_POWERPC_GLOB_DAT: | |
1430 | case elfcpp::R_POWERPC_JMP_SLOT: | |
1431 | case elfcpp::R_POWERPC_RELATIVE: | |
1432 | case elfcpp::R_POWERPC_DTPMOD: | |
1433 | gold_error(_("%s: unexpected reloc %u in object file"), | |
1434 | object->name().c_str(), r_type); | |
1435 | break; | |
1436 | ||
1437 | default: | |
1438 | unsupported_reloc_global(object, r_type, gsym); | |
1439 | break; | |
1440 | } | |
1441 | } | |
1442 | ||
6d03d481 ST |
1443 | // Process relocations for gc. |
1444 | ||
1445 | template<int size, bool big_endian> | |
1446 | void | |
1447 | Target_powerpc<size, big_endian>::gc_process_relocs( | |
6d03d481 ST |
1448 | Symbol_table* symtab, |
1449 | Layout* layout, | |
1450 | Sized_relobj<size, big_endian>* object, | |
1451 | unsigned int data_shndx, | |
1452 | unsigned int, | |
1453 | const unsigned char* prelocs, | |
1454 | size_t reloc_count, | |
1455 | Output_section* output_section, | |
1456 | bool needs_special_offset_handling, | |
1457 | size_t local_symbol_count, | |
1458 | const unsigned char* plocal_symbols) | |
1459 | { | |
1460 | typedef Target_powerpc<size, big_endian> Powerpc; | |
1461 | typedef typename Target_powerpc<size, big_endian>::Scan Scan; | |
1462 | ||
1463 | gold::gc_process_relocs<size, big_endian, Powerpc, elfcpp::SHT_RELA, Scan>( | |
6d03d481 ST |
1464 | symtab, |
1465 | layout, | |
1466 | this, | |
1467 | object, | |
1468 | data_shndx, | |
1469 | prelocs, | |
1470 | reloc_count, | |
1471 | output_section, | |
1472 | needs_special_offset_handling, | |
1473 | local_symbol_count, | |
1474 | plocal_symbols); | |
1475 | } | |
1476 | ||
42cacb20 DE |
1477 | // Scan relocations for a section. |
1478 | ||
1479 | template<int size, bool big_endian> | |
1480 | void | |
1481 | Target_powerpc<size, big_endian>::scan_relocs( | |
42cacb20 DE |
1482 | Symbol_table* symtab, |
1483 | Layout* layout, | |
1484 | Sized_relobj<size, big_endian>* object, | |
1485 | unsigned int data_shndx, | |
1486 | unsigned int sh_type, | |
1487 | const unsigned char* prelocs, | |
1488 | size_t reloc_count, | |
1489 | Output_section* output_section, | |
1490 | bool needs_special_offset_handling, | |
1491 | size_t local_symbol_count, | |
1492 | const unsigned char* plocal_symbols) | |
1493 | { | |
1494 | typedef Target_powerpc<size, big_endian> Powerpc; | |
1495 | typedef typename Target_powerpc<size, big_endian>::Scan Scan; | |
1496 | static Output_data_space* sdata; | |
1497 | ||
1498 | if (sh_type == elfcpp::SHT_REL) | |
1499 | { | |
1500 | gold_error(_("%s: unsupported REL reloc section"), | |
1501 | object->name().c_str()); | |
1502 | return; | |
1503 | } | |
1504 | ||
1505 | // Define _SDA_BASE_ at the start of the .sdata section. | |
1506 | if (sdata == NULL) | |
1507 | { | |
1508 | // layout->find_output_section(".sdata") == NULL | |
1509 | sdata = new Output_data_space(4, "** sdata"); | |
1510 | Output_section* os = layout->add_output_section_data(".sdata", 0, | |
1511 | elfcpp::SHF_ALLOC | |
1512 | | elfcpp::SHF_WRITE, | |
f5c870d2 | 1513 | sdata, false); |
42cacb20 DE |
1514 | symtab->define_in_output_data("_SDA_BASE_", NULL, |
1515 | os, | |
1516 | 32768, 0, | |
1517 | elfcpp::STT_OBJECT, | |
1518 | elfcpp::STB_LOCAL, | |
1519 | elfcpp::STV_HIDDEN, 0, | |
1520 | false, false); | |
1521 | } | |
1522 | ||
1523 | gold::scan_relocs<size, big_endian, Powerpc, elfcpp::SHT_RELA, Scan>( | |
42cacb20 DE |
1524 | symtab, |
1525 | layout, | |
1526 | this, | |
1527 | object, | |
1528 | data_shndx, | |
1529 | prelocs, | |
1530 | reloc_count, | |
1531 | output_section, | |
1532 | needs_special_offset_handling, | |
1533 | local_symbol_count, | |
1534 | plocal_symbols); | |
1535 | } | |
1536 | ||
1537 | // Finalize the sections. | |
1538 | ||
1539 | template<int size, bool big_endian> | |
1540 | void | |
d5b40221 DK |
1541 | Target_powerpc<size, big_endian>::do_finalize_sections( |
1542 | Layout* layout, | |
f59f41f3 DK |
1543 | const Input_objects*, |
1544 | Symbol_table*) | |
42cacb20 DE |
1545 | { |
1546 | // Fill in some more dynamic tags. | |
1547 | Output_data_dynamic* const odyn = layout->dynamic_data(); | |
1548 | if (odyn != NULL) | |
1549 | { | |
22b127cc ILT |
1550 | if (this->plt_ != NULL |
1551 | && this->plt_->output_section() != NULL) | |
42cacb20 DE |
1552 | { |
1553 | const Output_data* od = this->plt_->rel_plt(); | |
1554 | odyn->add_section_size(elfcpp::DT_PLTRELSZ, od); | |
1555 | odyn->add_section_address(elfcpp::DT_JMPREL, od); | |
1556 | odyn->add_constant(elfcpp::DT_PLTREL, elfcpp::DT_RELA); | |
1557 | ||
1558 | odyn->add_section_address(elfcpp::DT_PLTGOT, this->plt_); | |
1559 | } | |
1560 | ||
22b127cc ILT |
1561 | if (this->rela_dyn_ != NULL |
1562 | && this->rela_dyn_->output_section() != NULL) | |
42cacb20 DE |
1563 | { |
1564 | const Output_data* od = this->rela_dyn_; | |
1565 | odyn->add_section_address(elfcpp::DT_RELA, od); | |
1566 | odyn->add_section_size(elfcpp::DT_RELASZ, od); | |
1567 | odyn->add_constant(elfcpp::DT_RELAENT, | |
1568 | elfcpp::Elf_sizes<size>::rela_size); | |
1569 | } | |
1570 | ||
1571 | if (!parameters->options().shared()) | |
1572 | { | |
1573 | // The value of the DT_DEBUG tag is filled in by the dynamic | |
1574 | // linker at run time, and used by the debugger. | |
1575 | odyn->add_constant(elfcpp::DT_DEBUG, 0); | |
1576 | } | |
1577 | } | |
1578 | ||
1579 | // Emit any relocs we saved in an attempt to avoid generating COPY | |
1580 | // relocs. | |
1581 | if (this->copy_relocs_.any_saved_relocs()) | |
1582 | this->copy_relocs_.emit(this->rela_dyn_section(layout)); | |
1583 | } | |
1584 | ||
1585 | // Perform a relocation. | |
1586 | ||
1587 | template<int size, bool big_endian> | |
1588 | inline bool | |
1589 | Target_powerpc<size, big_endian>::Relocate::relocate( | |
1590 | const Relocate_info<size, big_endian>* relinfo, | |
1591 | Target_powerpc* target, | |
031cdbed | 1592 | Output_section*, |
42cacb20 DE |
1593 | size_t relnum, |
1594 | const elfcpp::Rela<size, big_endian>& rela, | |
1595 | unsigned int r_type, | |
1596 | const Sized_symbol<size>* gsym, | |
1597 | const Symbol_value<size>* psymval, | |
1598 | unsigned char* view, | |
1599 | typename elfcpp::Elf_types<size>::Elf_Addr address, | |
1600 | section_size_type /* view_size */) | |
1601 | { | |
1602 | const unsigned int toc_base_offset = 0x8000; | |
1603 | typedef Powerpc_relocate_functions<size, big_endian> Reloc; | |
1604 | ||
1605 | // Pick the value to use for symbols defined in shared objects. | |
1606 | Symbol_value<size> symval; | |
1607 | if (gsym != NULL | |
de4c45bd ILT |
1608 | && gsym->use_plt_offset(r_type == elfcpp::R_POWERPC_REL24 |
1609 | || r_type == elfcpp::R_PPC_LOCAL24PC | |
1610 | || r_type == elfcpp::R_PPC_REL16 | |
1611 | || r_type == elfcpp::R_PPC_REL16_LO | |
1612 | || r_type == elfcpp::R_PPC_REL16_HI | |
1613 | || r_type == elfcpp::R_PPC_REL16_HA)) | |
42cacb20 DE |
1614 | { |
1615 | elfcpp::Elf_Xword value; | |
1616 | ||
1617 | value = target->plt_section()->address() + gsym->plt_offset(); | |
1618 | ||
1619 | symval.set_output_value(value); | |
1620 | ||
1621 | psymval = &symval; | |
1622 | } | |
1623 | ||
1624 | const Sized_relobj<size, big_endian>* object = relinfo->object; | |
1625 | elfcpp::Elf_Xword addend = rela.get_r_addend(); | |
1626 | ||
1627 | // Get the GOT offset if needed. Unlike i386 and x86_64, our GOT | |
1628 | // pointer points to the beginning, not the end, of the table. | |
1629 | // So we just use the plain offset. | |
1630 | bool have_got_offset = false; | |
1631 | unsigned int got_offset = 0; | |
1632 | unsigned int got2_offset = 0; | |
1633 | switch (r_type) | |
1634 | { | |
1635 | case elfcpp::R_PPC64_TOC16: | |
1636 | case elfcpp::R_PPC64_TOC16_LO: | |
1637 | case elfcpp::R_PPC64_TOC16_HI: | |
1638 | case elfcpp::R_PPC64_TOC16_HA: | |
1639 | case elfcpp::R_PPC64_TOC16_DS: | |
1640 | case elfcpp::R_PPC64_TOC16_LO_DS: | |
1641 | // Subtract the TOC base address. | |
1642 | addend -= target->toc_section()->address() + toc_base_offset; | |
1643 | /* FALLTHRU */ | |
1644 | ||
1645 | case elfcpp::R_POWERPC_GOT16: | |
1646 | case elfcpp::R_POWERPC_GOT16_LO: | |
1647 | case elfcpp::R_POWERPC_GOT16_HI: | |
1648 | case elfcpp::R_POWERPC_GOT16_HA: | |
1649 | case elfcpp::R_PPC64_GOT16_DS: | |
1650 | case elfcpp::R_PPC64_GOT16_LO_DS: | |
1651 | if (gsym != NULL) | |
1652 | { | |
1653 | gold_assert(gsym->has_got_offset(GOT_TYPE_STANDARD)); | |
1654 | got_offset = gsym->got_offset(GOT_TYPE_STANDARD); | |
1655 | } | |
1656 | else | |
1657 | { | |
1658 | unsigned int r_sym = elfcpp::elf_r_sym<size>(rela.get_r_info()); | |
1659 | gold_assert(object->local_has_got_offset(r_sym, GOT_TYPE_STANDARD)); | |
1660 | got_offset = object->local_got_offset(r_sym, GOT_TYPE_STANDARD); | |
1661 | } | |
1662 | have_got_offset = true; | |
1663 | break; | |
1664 | ||
1665 | // R_PPC_PLTREL24 is rather special. If non-zero, | |
1666 | // the addend specifies the GOT pointer offset within .got2. | |
1667 | case elfcpp::R_PPC_PLTREL24: | |
1668 | if (addend >= 32768) | |
1669 | { | |
1670 | Output_data_space* got2; | |
1671 | got2 = target->got2_section(); | |
1672 | got2_offset = got2->offset(); | |
1673 | addend += got2_offset; | |
1674 | } | |
1675 | have_got_offset = true; | |
1676 | break; | |
1677 | ||
1678 | default: | |
1679 | break; | |
1680 | } | |
1681 | ||
1682 | switch (r_type) | |
1683 | { | |
1684 | case elfcpp::R_POWERPC_NONE: | |
1685 | case elfcpp::R_POWERPC_GNU_VTINHERIT: | |
1686 | case elfcpp::R_POWERPC_GNU_VTENTRY: | |
1687 | break; | |
1688 | ||
1689 | case elfcpp::R_POWERPC_REL32: | |
1690 | Reloc::rel32(view, object, psymval, addend, address); | |
1691 | break; | |
1692 | ||
1693 | case elfcpp::R_POWERPC_REL24: | |
1694 | Reloc::rel24(view, object, psymval, addend, address); | |
1695 | break; | |
1696 | ||
1697 | case elfcpp::R_POWERPC_REL14: | |
1698 | Reloc::rel14(view, object, psymval, addend, address); | |
1699 | break; | |
1700 | ||
1701 | case elfcpp::R_PPC_PLTREL24: | |
1702 | Reloc::rel24(view, object, psymval, addend, address); | |
1703 | break; | |
1704 | ||
1705 | case elfcpp::R_PPC_LOCAL24PC: | |
1706 | Reloc::rel24(view, object, psymval, addend, address); | |
1707 | break; | |
1708 | ||
1709 | case elfcpp::R_PPC64_ADDR64: | |
1710 | if (!parameters->options().output_is_position_independent()) | |
1711 | Relocate_functions<size, big_endian>::rela64(view, object, | |
1712 | psymval, addend); | |
1713 | break; | |
1714 | ||
1715 | case elfcpp::R_POWERPC_ADDR32: | |
1716 | if (!parameters->options().output_is_position_independent()) | |
1717 | Relocate_functions<size, big_endian>::rela32(view, object, | |
1718 | psymval, addend); | |
1719 | break; | |
1720 | ||
1721 | case elfcpp::R_POWERPC_ADDR16_LO: | |
1722 | Reloc::addr16_lo(view, object, psymval, addend); | |
1723 | break; | |
1724 | ||
1725 | case elfcpp::R_POWERPC_ADDR16_HI: | |
1726 | Reloc::addr16_hi(view, object, psymval, addend); | |
1727 | break; | |
1728 | ||
1729 | case elfcpp::R_POWERPC_ADDR16_HA: | |
1730 | Reloc::addr16_ha(view, object, psymval, addend); | |
1731 | break; | |
1732 | ||
1733 | case elfcpp::R_PPC_REL16_LO: | |
1734 | Reloc::rel16_lo(view, object, psymval, addend, address); | |
1735 | break; | |
1736 | ||
1737 | case elfcpp::R_PPC_REL16_HI: | |
1738 | Reloc::rel16_lo(view, object, psymval, addend, address); | |
1739 | break; | |
1740 | ||
1741 | case elfcpp::R_PPC_REL16_HA: | |
83d22aa8 | 1742 | Reloc::rel16_ha(view, object, psymval, addend, address); |
42cacb20 DE |
1743 | break; |
1744 | ||
1745 | case elfcpp::R_POWERPC_GOT16: | |
1746 | Reloc::addr16(view, got_offset, addend); | |
1747 | break; | |
1748 | ||
1749 | case elfcpp::R_POWERPC_GOT16_LO: | |
1750 | Reloc::addr16_lo(view, got_offset, addend); | |
1751 | break; | |
1752 | ||
1753 | case elfcpp::R_POWERPC_GOT16_HI: | |
1754 | Reloc::addr16_hi(view, got_offset, addend); | |
1755 | break; | |
1756 | ||
1757 | case elfcpp::R_POWERPC_GOT16_HA: | |
1758 | Reloc::addr16_ha(view, got_offset, addend); | |
1759 | break; | |
1760 | ||
1761 | case elfcpp::R_PPC64_TOC16: | |
1762 | Reloc::addr16(view, got_offset, addend); | |
1763 | break; | |
1764 | ||
1765 | case elfcpp::R_PPC64_TOC16_LO: | |
1766 | Reloc::addr16_lo(view, got_offset, addend); | |
1767 | break; | |
1768 | ||
1769 | case elfcpp::R_PPC64_TOC16_HI: | |
1770 | Reloc::addr16_hi(view, got_offset, addend); | |
1771 | break; | |
1772 | ||
1773 | case elfcpp::R_PPC64_TOC16_HA: | |
1774 | Reloc::addr16_ha(view, got_offset, addend); | |
1775 | break; | |
1776 | ||
1777 | case elfcpp::R_PPC64_TOC16_DS: | |
1778 | case elfcpp::R_PPC64_TOC16_LO_DS: | |
1779 | Reloc::addr16_ds(view, got_offset, addend); | |
1780 | break; | |
1781 | ||
1782 | case elfcpp::R_PPC64_TOC: | |
1783 | { | |
1784 | elfcpp::Elf_types<64>::Elf_Addr value; | |
1785 | value = target->toc_section()->address() + toc_base_offset; | |
1786 | Relocate_functions<64, false>::rela64(view, value, addend); | |
1787 | } | |
1788 | break; | |
1789 | ||
1790 | case elfcpp::R_POWERPC_COPY: | |
1791 | case elfcpp::R_POWERPC_GLOB_DAT: | |
1792 | case elfcpp::R_POWERPC_JMP_SLOT: | |
1793 | case elfcpp::R_POWERPC_RELATIVE: | |
1794 | // This is an outstanding tls reloc, which is unexpected when | |
1795 | // linking. | |
1796 | case elfcpp::R_POWERPC_DTPMOD: | |
1797 | gold_error_at_location(relinfo, relnum, rela.get_r_offset(), | |
1798 | _("unexpected reloc %u in object file"), | |
1799 | r_type); | |
1800 | break; | |
1801 | ||
1802 | default: | |
1803 | gold_error_at_location(relinfo, relnum, rela.get_r_offset(), | |
1804 | _("unsupported reloc %u"), | |
1805 | r_type); | |
1806 | break; | |
1807 | } | |
1808 | ||
1809 | return true; | |
1810 | } | |
1811 | ||
1812 | // Perform a TLS relocation. | |
1813 | ||
1814 | template<int size, bool big_endian> | |
1815 | inline void | |
1816 | Target_powerpc<size, big_endian>::Relocate::relocate_tls( | |
1817 | const Relocate_info<size, big_endian>* relinfo, | |
1818 | Target_powerpc<size, big_endian>* target, | |
1819 | size_t relnum, | |
1820 | const elfcpp::Rela<size, big_endian>& rela, | |
1821 | unsigned int r_type, | |
1822 | const Sized_symbol<size>* gsym, | |
1823 | const Symbol_value<size>* psymval, | |
1824 | unsigned char* view, | |
1825 | typename elfcpp::Elf_types<size>::Elf_Addr address, | |
1826 | section_size_type) | |
1827 | { | |
1828 | Output_segment* tls_segment = relinfo->layout->tls_segment(); | |
1829 | typedef Powerpc_relocate_functions<size, big_endian> Reloc; | |
1830 | const Sized_relobj<size, big_endian>* object = relinfo->object; | |
1831 | ||
1832 | const elfcpp::Elf_Xword addend = rela.get_r_addend(); | |
1833 | typename elfcpp::Elf_types<size>::Elf_Addr value = psymval->value(object, 0); | |
1834 | ||
1835 | const bool is_final = | |
1836 | (gsym == NULL | |
1837 | ? !parameters->options().output_is_position_independent() | |
1838 | : gsym->final_value_is_known()); | |
1839 | const tls::Tls_optimization optimized_type | |
1840 | = optimize_tls_reloc(is_final, r_type); | |
1841 | ||
1842 | switch (r_type) | |
1843 | { | |
1844 | // XXX | |
1845 | } | |
1846 | } | |
1847 | ||
1848 | // Relocate section data. | |
1849 | ||
1850 | template<int size, bool big_endian> | |
1851 | void | |
1852 | Target_powerpc<size, big_endian>::relocate_section( | |
1853 | const Relocate_info<size, big_endian>* relinfo, | |
1854 | unsigned int sh_type, | |
1855 | const unsigned char* prelocs, | |
1856 | size_t reloc_count, | |
1857 | Output_section* output_section, | |
1858 | bool needs_special_offset_handling, | |
1859 | unsigned char* view, | |
1860 | typename elfcpp::Elf_types<size>::Elf_Addr address, | |
364c7fa5 ILT |
1861 | section_size_type view_size, |
1862 | const Reloc_symbol_changes* reloc_symbol_changes) | |
42cacb20 DE |
1863 | { |
1864 | typedef Target_powerpc<size, big_endian> Powerpc; | |
1865 | typedef typename Target_powerpc<size, big_endian>::Relocate Powerpc_relocate; | |
1866 | ||
1867 | gold_assert(sh_type == elfcpp::SHT_RELA); | |
1868 | ||
1869 | gold::relocate_section<size, big_endian, Powerpc, elfcpp::SHT_RELA, | |
1870 | Powerpc_relocate>( | |
1871 | relinfo, | |
1872 | this, | |
1873 | prelocs, | |
1874 | reloc_count, | |
1875 | output_section, | |
1876 | needs_special_offset_handling, | |
1877 | view, | |
1878 | address, | |
364c7fa5 ILT |
1879 | view_size, |
1880 | reloc_symbol_changes); | |
42cacb20 DE |
1881 | } |
1882 | ||
1883 | // Return the size of a relocation while scanning during a relocatable | |
1884 | // link. | |
1885 | ||
1886 | template<int size, bool big_endian> | |
1887 | unsigned int | |
1888 | Target_powerpc<size, big_endian>::Relocatable_size_for_reloc::get_size_for_reloc( | |
1889 | unsigned int, | |
1890 | Relobj*) | |
1891 | { | |
1892 | // We are always SHT_RELA, so we should never get here. | |
1893 | gold_unreachable(); | |
1894 | return 0; | |
1895 | } | |
1896 | ||
1897 | // Scan the relocs during a relocatable link. | |
1898 | ||
1899 | template<int size, bool big_endian> | |
1900 | void | |
1901 | Target_powerpc<size, big_endian>::scan_relocatable_relocs( | |
42cacb20 DE |
1902 | Symbol_table* symtab, |
1903 | Layout* layout, | |
1904 | Sized_relobj<size, big_endian>* object, | |
1905 | unsigned int data_shndx, | |
1906 | unsigned int sh_type, | |
1907 | const unsigned char* prelocs, | |
1908 | size_t reloc_count, | |
1909 | Output_section* output_section, | |
1910 | bool needs_special_offset_handling, | |
1911 | size_t local_symbol_count, | |
1912 | const unsigned char* plocal_symbols, | |
1913 | Relocatable_relocs* rr) | |
1914 | { | |
1915 | gold_assert(sh_type == elfcpp::SHT_RELA); | |
1916 | ||
1917 | typedef gold::Default_scan_relocatable_relocs<elfcpp::SHT_RELA, | |
1918 | Relocatable_size_for_reloc> Scan_relocatable_relocs; | |
1919 | ||
1920 | gold::scan_relocatable_relocs<size, big_endian, elfcpp::SHT_RELA, | |
1921 | Scan_relocatable_relocs>( | |
42cacb20 DE |
1922 | symtab, |
1923 | layout, | |
1924 | object, | |
1925 | data_shndx, | |
1926 | prelocs, | |
1927 | reloc_count, | |
1928 | output_section, | |
1929 | needs_special_offset_handling, | |
1930 | local_symbol_count, | |
1931 | plocal_symbols, | |
1932 | rr); | |
1933 | } | |
1934 | ||
1935 | // Relocate a section during a relocatable link. | |
1936 | ||
1937 | template<int size, bool big_endian> | |
1938 | void | |
1939 | Target_powerpc<size, big_endian>::relocate_for_relocatable( | |
1940 | const Relocate_info<size, big_endian>* relinfo, | |
1941 | unsigned int sh_type, | |
1942 | const unsigned char* prelocs, | |
1943 | size_t reloc_count, | |
1944 | Output_section* output_section, | |
1945 | off_t offset_in_output_section, | |
1946 | const Relocatable_relocs* rr, | |
1947 | unsigned char* view, | |
1948 | typename elfcpp::Elf_types<size>::Elf_Addr view_address, | |
1949 | section_size_type view_size, | |
1950 | unsigned char* reloc_view, | |
1951 | section_size_type reloc_view_size) | |
1952 | { | |
1953 | gold_assert(sh_type == elfcpp::SHT_RELA); | |
1954 | ||
1955 | gold::relocate_for_relocatable<size, big_endian, elfcpp::SHT_RELA>( | |
1956 | relinfo, | |
1957 | prelocs, | |
1958 | reloc_count, | |
1959 | output_section, | |
1960 | offset_in_output_section, | |
1961 | rr, | |
1962 | view, | |
1963 | view_address, | |
1964 | view_size, | |
1965 | reloc_view, | |
1966 | reloc_view_size); | |
1967 | } | |
1968 | ||
1969 | // Return the value to use for a dynamic which requires special | |
1970 | // treatment. This is how we support equality comparisons of function | |
1971 | // pointers across shared library boundaries, as described in the | |
1972 | // processor specific ABI supplement. | |
1973 | ||
1974 | template<int size, bool big_endian> | |
1975 | uint64_t | |
1976 | Target_powerpc<size, big_endian>::do_dynsym_value(const Symbol* gsym) const | |
1977 | { | |
1978 | gold_assert(gsym->is_from_dynobj() && gsym->has_plt_offset()); | |
1979 | return this->plt_section()->address() + gsym->plt_offset(); | |
1980 | } | |
1981 | ||
1982 | // The selector for powerpc object files. | |
1983 | ||
1984 | template<int size, bool big_endian> | |
1985 | class Target_selector_powerpc : public Target_selector | |
1986 | { | |
1987 | public: | |
1988 | Target_selector_powerpc() | |
1989 | : Target_selector(elfcpp::EM_NONE, size, big_endian, | |
1990 | (size == 64 ? | |
1991 | (big_endian ? "elf64-powerpc" : "elf64-powerpcle") : | |
1992 | (big_endian ? "elf32-powerpc" : "elf32-powerpcle"))) | |
1993 | { } | |
1994 | ||
42cacb20 DE |
1995 | Target* do_recognize(int machine, int, int) |
1996 | { | |
1997 | switch (size) | |
1998 | { | |
1999 | case 64: | |
2000 | if (machine != elfcpp::EM_PPC64) | |
2001 | return NULL; | |
2002 | break; | |
2003 | ||
2004 | case 32: | |
2005 | if (machine != elfcpp::EM_PPC) | |
2006 | return NULL; | |
2007 | break; | |
2008 | ||
2009 | default: | |
2010 | return NULL; | |
2011 | } | |
2012 | ||
7f055c20 | 2013 | return this->instantiate_target(); |
42cacb20 DE |
2014 | } |
2015 | ||
2016 | Target* do_instantiate_target() | |
7f055c20 | 2017 | { return new Target_powerpc<size, big_endian>(); } |
42cacb20 DE |
2018 | }; |
2019 | ||
2020 | Target_selector_powerpc<32, true> target_selector_ppc32; | |
2021 | Target_selector_powerpc<32, false> target_selector_ppc32le; | |
2022 | Target_selector_powerpc<64, true> target_selector_ppc64; | |
2023 | Target_selector_powerpc<64, false> target_selector_ppc64le; | |
2024 | ||
2025 | } // End anonymous namespace. |