Commit | Line | Data |
---|---|---|
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 | ||
21bb3914 ST |
186 | inline bool |
187 | local_reloc_may_be_function_pointer(Symbol_table* , Layout* , | |
188 | Target_powerpc* , | |
189 | Sized_relobj<size, big_endian>* , | |
190 | unsigned int , | |
191 | Output_section* , | |
192 | const elfcpp::Rela<size, big_endian>& , | |
193 | unsigned int , | |
194 | const elfcpp::Sym<size, big_endian>&) | |
195 | { return false; } | |
196 | ||
197 | inline bool | |
198 | global_reloc_may_be_function_pointer(Symbol_table* , Layout* , | |
199 | Target_powerpc* , | |
200 | Sized_relobj<size, big_endian>* , | |
201 | unsigned int , | |
202 | Output_section* , | |
203 | const elfcpp::Rela<size, | |
204 | big_endian>& , | |
205 | unsigned int , Symbol*) | |
206 | { return false; } | |
207 | ||
42cacb20 DE |
208 | private: |
209 | static void | |
210 | unsupported_reloc_local(Sized_relobj<size, big_endian>*, | |
211 | unsigned int r_type); | |
212 | ||
213 | static void | |
214 | unsupported_reloc_global(Sized_relobj<size, big_endian>*, | |
215 | unsigned int r_type, Symbol*); | |
216 | ||
217 | static void | |
218 | generate_tls_call(Symbol_table* symtab, Layout* layout, | |
219 | Target_powerpc* target); | |
220 | ||
221 | void | |
222 | check_non_pic(Relobj*, unsigned int r_type); | |
223 | ||
224 | // Whether we have issued an error about a non-PIC compilation. | |
225 | bool issued_non_pic_error_; | |
226 | }; | |
227 | ||
228 | // The class which implements relocation. | |
229 | class Relocate | |
230 | { | |
231 | public: | |
232 | // Do a relocation. Return false if the caller should not issue | |
233 | // any warnings about this relocation. | |
234 | inline bool | |
235 | relocate(const Relocate_info<size, big_endian>*, Target_powerpc*, | |
031cdbed ILT |
236 | Output_section*, size_t relnum, |
237 | const elfcpp::Rela<size, big_endian>&, | |
42cacb20 DE |
238 | unsigned int r_type, const Sized_symbol<size>*, |
239 | const Symbol_value<size>*, | |
240 | unsigned char*, | |
241 | typename elfcpp::Elf_types<size>::Elf_Addr, | |
242 | section_size_type); | |
243 | ||
244 | private: | |
245 | // Do a TLS relocation. | |
246 | inline void | |
247 | relocate_tls(const Relocate_info<size, big_endian>*, | |
248 | Target_powerpc* target, | |
249 | size_t relnum, const elfcpp::Rela<size, big_endian>&, | |
250 | unsigned int r_type, const Sized_symbol<size>*, | |
251 | const Symbol_value<size>*, | |
252 | unsigned char*, | |
253 | typename elfcpp::Elf_types<size>::Elf_Addr, | |
254 | section_size_type); | |
255 | }; | |
256 | ||
257 | // A class which returns the size required for a relocation type, | |
258 | // used while scanning relocs during a relocatable link. | |
259 | class Relocatable_size_for_reloc | |
260 | { | |
261 | public: | |
262 | unsigned int | |
263 | get_size_for_reloc(unsigned int, Relobj*); | |
264 | }; | |
265 | ||
266 | // Get the GOT section, creating it if necessary. | |
267 | Output_data_got<size, big_endian>* | |
268 | got_section(Symbol_table*, Layout*); | |
269 | ||
270 | Output_data_space* | |
271 | got2_section() const | |
272 | { | |
273 | gold_assert (this->got2_ != NULL); | |
274 | return this->got2_; | |
275 | } | |
276 | ||
277 | // Get the TOC section. | |
278 | Output_data_space* | |
279 | toc_section() const | |
280 | { | |
281 | gold_assert (this->toc_ != NULL); | |
282 | return this->toc_; | |
283 | } | |
284 | ||
285 | // Create a PLT entry for a global symbol. | |
286 | void | |
287 | make_plt_entry(Symbol_table*, Layout*, Symbol*); | |
288 | ||
289 | // Create a GOT entry for the TLS module index. | |
290 | unsigned int | |
291 | got_mod_index_entry(Symbol_table* symtab, Layout* layout, | |
292 | Sized_relobj<size, big_endian>* object); | |
293 | ||
294 | // Get the PLT section. | |
295 | const Output_data_plt_powerpc<size, big_endian>* | |
296 | plt_section() const | |
297 | { | |
298 | gold_assert(this->plt_ != NULL); | |
299 | return this->plt_; | |
300 | } | |
301 | ||
302 | // Get the dynamic reloc section, creating it if necessary. | |
303 | Reloc_section* | |
304 | rela_dyn_section(Layout*); | |
305 | ||
42cacb20 DE |
306 | // Copy a relocation against a global symbol. |
307 | void | |
ef9beddf ILT |
308 | copy_reloc(Symbol_table* symtab, Layout* layout, |
309 | Sized_relobj<size, big_endian>* object, | |
42cacb20 DE |
310 | unsigned int shndx, Output_section* output_section, |
311 | Symbol* sym, const elfcpp::Rela<size, big_endian>& reloc) | |
312 | { | |
313 | this->copy_relocs_.copy_reloc(symtab, layout, | |
314 | symtab->get_sized_symbol<size>(sym), | |
315 | object, shndx, output_section, | |
316 | reloc, this->rela_dyn_section(layout)); | |
317 | } | |
318 | ||
319 | // Information about this specific target which we pass to the | |
320 | // general Target structure. | |
321 | static Target::Target_info powerpc_info; | |
322 | ||
323 | // The types of GOT entries needed for this platform. | |
324 | enum Got_type | |
325 | { | |
326 | GOT_TYPE_STANDARD = 0, // GOT entry for a regular symbol | |
327 | GOT_TYPE_TLS_OFFSET = 1, // GOT entry for TLS offset | |
328 | GOT_TYPE_TLS_PAIR = 2, // GOT entry for TLS module/offset pair | |
329 | }; | |
330 | ||
331 | // The GOT section. | |
332 | Output_data_got<size, big_endian>* got_; | |
333 | // The GOT2 section. | |
334 | Output_data_space* got2_; | |
335 | // The TOC section. | |
336 | Output_data_space* toc_; | |
337 | // The PLT section. | |
338 | Output_data_plt_powerpc<size, big_endian>* plt_; | |
339 | // The dynamic reloc section. | |
340 | Reloc_section* rela_dyn_; | |
341 | // Relocs saved to avoid a COPY reloc. | |
342 | Copy_relocs<elfcpp::SHT_RELA, size, big_endian> copy_relocs_; | |
343 | // Space for variables copied with a COPY reloc. | |
344 | Output_data_space* dynbss_; | |
345 | // Offset of the GOT entry for the TLS module index; | |
346 | unsigned int got_mod_index_offset_; | |
347 | }; | |
348 | ||
349 | template<> | |
350 | Target::Target_info Target_powerpc<32, true>::powerpc_info = | |
351 | { | |
352 | 32, // size | |
353 | true, // is_big_endian | |
354 | elfcpp::EM_PPC, // machine_code | |
355 | false, // has_make_symbol | |
356 | false, // has_resolve | |
357 | false, // has_code_fill | |
358 | true, // is_default_stack_executable | |
359 | '\0', // wrap_char | |
360 | "/usr/lib/ld.so.1", // dynamic_linker | |
361 | 0x10000000, // default_text_segment_address | |
362 | 64 * 1024, // abi_pagesize (overridable by -z max-page-size) | |
8a5e3e08 ILT |
363 | 4 * 1024, // common_pagesize (overridable by -z common-page-size) |
364 | elfcpp::SHN_UNDEF, // small_common_shndx | |
365 | elfcpp::SHN_UNDEF, // large_common_shndx | |
366 | 0, // small_common_section_flags | |
05a352e6 DK |
367 | 0, // large_common_section_flags |
368 | NULL, // attributes_section | |
369 | NULL // attributes_vendor | |
42cacb20 DE |
370 | }; |
371 | ||
372 | template<> | |
373 | Target::Target_info Target_powerpc<32, false>::powerpc_info = | |
374 | { | |
375 | 32, // size | |
376 | false, // is_big_endian | |
377 | elfcpp::EM_PPC, // machine_code | |
378 | false, // has_make_symbol | |
379 | false, // has_resolve | |
380 | false, // has_code_fill | |
381 | true, // is_default_stack_executable | |
382 | '\0', // wrap_char | |
383 | "/usr/lib/ld.so.1", // dynamic_linker | |
384 | 0x10000000, // default_text_segment_address | |
385 | 64 * 1024, // abi_pagesize (overridable by -z max-page-size) | |
8a5e3e08 ILT |
386 | 4 * 1024, // common_pagesize (overridable by -z common-page-size) |
387 | elfcpp::SHN_UNDEF, // small_common_shndx | |
388 | elfcpp::SHN_UNDEF, // large_common_shndx | |
389 | 0, // small_common_section_flags | |
05a352e6 DK |
390 | 0, // large_common_section_flags |
391 | NULL, // attributes_section | |
392 | NULL // attributes_vendor | |
42cacb20 DE |
393 | }; |
394 | ||
395 | template<> | |
396 | Target::Target_info Target_powerpc<64, true>::powerpc_info = | |
397 | { | |
398 | 64, // size | |
399 | true, // is_big_endian | |
400 | elfcpp::EM_PPC64, // machine_code | |
401 | false, // has_make_symbol | |
402 | false, // has_resolve | |
403 | false, // has_code_fill | |
404 | true, // is_default_stack_executable | |
405 | '\0', // wrap_char | |
406 | "/usr/lib/ld.so.1", // dynamic_linker | |
407 | 0x10000000, // default_text_segment_address | |
408 | 64 * 1024, // abi_pagesize (overridable by -z max-page-size) | |
8a5e3e08 ILT |
409 | 8 * 1024, // common_pagesize (overridable by -z common-page-size) |
410 | elfcpp::SHN_UNDEF, // small_common_shndx | |
411 | elfcpp::SHN_UNDEF, // large_common_shndx | |
412 | 0, // small_common_section_flags | |
05a352e6 DK |
413 | 0, // large_common_section_flags |
414 | NULL, // attributes_section | |
415 | NULL // attributes_vendor | |
42cacb20 DE |
416 | }; |
417 | ||
418 | template<> | |
419 | Target::Target_info Target_powerpc<64, false>::powerpc_info = | |
420 | { | |
421 | 64, // size | |
422 | false, // is_big_endian | |
423 | elfcpp::EM_PPC64, // machine_code | |
424 | false, // has_make_symbol | |
425 | false, // has_resolve | |
426 | false, // has_code_fill | |
427 | true, // is_default_stack_executable | |
428 | '\0', // wrap_char | |
429 | "/usr/lib/ld.so.1", // dynamic_linker | |
430 | 0x10000000, // default_text_segment_address | |
431 | 64 * 1024, // abi_pagesize (overridable by -z max-page-size) | |
8a5e3e08 ILT |
432 | 8 * 1024, // common_pagesize (overridable by -z common-page-size) |
433 | elfcpp::SHN_UNDEF, // small_common_shndx | |
434 | elfcpp::SHN_UNDEF, // large_common_shndx | |
435 | 0, // small_common_section_flags | |
05a352e6 DK |
436 | 0, // large_common_section_flags |
437 | NULL, // attributes_section | |
438 | NULL // attributes_vendor | |
42cacb20 DE |
439 | }; |
440 | ||
441 | template<int size, bool big_endian> | |
442 | class Powerpc_relocate_functions | |
443 | { | |
444 | private: | |
445 | // Do a simple relocation with the addend in the relocation. | |
446 | template<int valsize> | |
447 | static inline void | |
448 | rela(unsigned char* view, | |
449 | unsigned int right_shift, | |
450 | elfcpp::Elf_Xword dst_mask, | |
451 | typename elfcpp::Swap<size, big_endian>::Valtype value, | |
452 | typename elfcpp::Swap<size, 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 = ((value + 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. | |
467 | template<int valsize> | |
468 | static inline void | |
469 | rela(unsigned char* view, | |
470 | unsigned int right_shift, | |
471 | elfcpp::Elf_Xword dst_mask, | |
472 | const Sized_relobj<size, big_endian>* object, | |
473 | const Symbol_value<size>* psymval, | |
474 | typename elfcpp::Swap<valsize, big_endian>::Valtype addend) | |
475 | { | |
476 | typedef typename elfcpp::Swap<valsize, big_endian>::Valtype Valtype; | |
477 | Valtype* wv = reinterpret_cast<Valtype*>(view); | |
478 | Valtype val = elfcpp::Swap<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<valsize, big_endian>::writeval(wv, val | reloc); | |
485 | } | |
486 | ||
487 | // Do a simple relocation using a symbol value with the addend in | |
488 | // the relocation, unaligned. | |
489 | template<int valsize> | |
490 | static inline void | |
491 | rela_ua(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 | { | |
497 | typedef typename elfcpp::Swap_unaligned<valsize, | |
498 | big_endian>::Valtype Valtype; | |
499 | unsigned char* wv = view; | |
500 | Valtype val = elfcpp::Swap_unaligned<valsize, big_endian>::readval(wv); | |
501 | Valtype reloc = (psymval->value(object, addend) >> right_shift); | |
502 | ||
503 | val &= ~dst_mask; | |
504 | reloc &= dst_mask; | |
505 | ||
506 | elfcpp::Swap_unaligned<valsize, big_endian>::writeval(wv, val | reloc); | |
507 | } | |
508 | ||
509 | // Do a simple PC relative relocation with a Symbol_value with the | |
510 | // addend in the relocation. | |
511 | template<int valsize> | |
512 | static inline void | |
513 | pcrela(unsigned char* view, unsigned int right_shift, | |
514 | elfcpp::Elf_Xword dst_mask, | |
515 | const Sized_relobj<size, big_endian>* object, | |
516 | const Symbol_value<size>* psymval, | |
517 | typename elfcpp::Swap<size, big_endian>::Valtype addend, | |
518 | typename elfcpp::Elf_types<size>::Elf_Addr address) | |
519 | { | |
520 | typedef typename elfcpp::Swap<valsize, big_endian>::Valtype Valtype; | |
521 | Valtype* wv = reinterpret_cast<Valtype*>(view); | |
522 | Valtype val = elfcpp::Swap<valsize, big_endian>::readval(wv); | |
523 | Valtype reloc = ((psymval->value(object, addend) - address) | |
524 | >> right_shift); | |
525 | ||
526 | val &= ~dst_mask; | |
527 | reloc &= dst_mask; | |
528 | ||
529 | elfcpp::Swap<valsize, big_endian>::writeval(wv, val | reloc); | |
530 | } | |
531 | ||
532 | template<int valsize> | |
533 | static inline void | |
534 | pcrela_unaligned(unsigned char* view, | |
535 | const Sized_relobj<size, big_endian>* object, | |
536 | const Symbol_value<size>* psymval, | |
537 | typename elfcpp::Swap<size, big_endian>::Valtype addend, | |
538 | typename elfcpp::Elf_types<size>::Elf_Addr address) | |
539 | { | |
540 | typedef typename elfcpp::Swap_unaligned<valsize, | |
541 | big_endian>::Valtype Valtype; | |
542 | unsigned char* wv = view; | |
543 | Valtype reloc = (psymval->value(object, addend) - address); | |
544 | ||
545 | elfcpp::Swap_unaligned<valsize, big_endian>::writeval(wv, reloc); | |
546 | } | |
547 | ||
548 | typedef Powerpc_relocate_functions<size, big_endian> This; | |
549 | typedef Relocate_functions<size, big_endian> This_reloc; | |
550 | public: | |
551 | // R_POWERPC_REL32: (Symbol + Addend - Address) | |
552 | static inline void | |
553 | rel32(unsigned char* view, | |
554 | const Sized_relobj<size, big_endian>* object, | |
555 | const Symbol_value<size>* psymval, | |
556 | typename elfcpp::Elf_types<size>::Elf_Addr addend, | |
557 | typename elfcpp::Elf_types<size>::Elf_Addr address) | |
558 | { This_reloc::pcrela32(view, object, psymval, addend, address); } | |
559 | ||
560 | // R_POWERPC_REL24: (Symbol + Addend - Address) & 0x3fffffc | |
561 | static inline void | |
562 | rel24(unsigned char* view, | |
563 | const Sized_relobj<size, big_endian>* object, | |
564 | const Symbol_value<size>* psymval, | |
565 | typename elfcpp::Elf_types<size>::Elf_Addr addend, | |
566 | typename elfcpp::Elf_types<size>::Elf_Addr address) | |
567 | { | |
568 | This::template pcrela<32>(view, 0, 0x03fffffc, object, | |
569 | psymval, addend, address); | |
570 | } | |
571 | ||
572 | // R_POWERPC_REL14: (Symbol + Addend - Address) & 0xfffc | |
573 | static inline void | |
574 | rel14(unsigned char* view, | |
575 | const Sized_relobj<size, big_endian>* object, | |
576 | const Symbol_value<size>* psymval, | |
577 | typename elfcpp::Elf_types<size>::Elf_Addr addend, | |
578 | typename elfcpp::Elf_types<size>::Elf_Addr address) | |
579 | { | |
580 | This::template pcrela<32>(view, 0, 0x0000fffc, object, | |
581 | psymval, addend, address); | |
582 | } | |
583 | ||
584 | // R_POWERPC_ADDR16: (Symbol + Addend) & 0xffff | |
585 | static inline void | |
586 | addr16(unsigned char* view, | |
587 | typename elfcpp::Elf_types<size>::Elf_Addr value, | |
588 | typename elfcpp::Elf_types<size>::Elf_Addr addend) | |
589 | { This_reloc::rela16(view, value, addend); } | |
590 | ||
591 | static inline void | |
592 | addr16(unsigned char* view, | |
593 | const Sized_relobj<size, big_endian>* object, | |
594 | const Symbol_value<size>* psymval, | |
595 | typename elfcpp::Elf_types<size>::Elf_Addr addend) | |
596 | { This_reloc::rela16(view, object, psymval, addend); } | |
597 | ||
598 | // R_POWERPC_ADDR16_DS: (Symbol + Addend) & 0xfffc | |
599 | static inline void | |
600 | addr16_ds(unsigned char* view, | |
601 | typename elfcpp::Elf_types<size>::Elf_Addr value, | |
602 | typename elfcpp::Elf_types<size>::Elf_Addr addend) | |
603 | { | |
604 | This::template rela<16>(view, 0, 0xfffc, value, addend); | |
605 | } | |
606 | ||
607 | // R_POWERPC_ADDR16_LO: (Symbol + Addend) & 0xffff | |
608 | static inline void | |
609 | addr16_lo(unsigned char* view, | |
610 | typename elfcpp::Elf_types<size>::Elf_Addr value, | |
611 | typename elfcpp::Elf_types<size>::Elf_Addr addend) | |
612 | { This_reloc::rela16(view, value, addend); } | |
613 | ||
614 | static inline void | |
615 | addr16_lo(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 | { This_reloc::rela16(view, object, psymval, addend); } | |
620 | ||
621 | // R_POWERPC_ADDR16_HI: ((Symbol + Addend) >> 16) & 0xffff | |
622 | static inline void | |
623 | addr16_hi(unsigned char* view, | |
624 | typename elfcpp::Elf_types<size>::Elf_Addr value, | |
625 | typename elfcpp::Elf_types<size>::Elf_Addr addend) | |
626 | { | |
627 | This::template rela<16>(view, 16, 0xffff, value, addend); | |
628 | } | |
629 | ||
630 | static inline void | |
631 | addr16_hi(unsigned char* view, | |
632 | const Sized_relobj<size, big_endian>* object, | |
633 | const Symbol_value<size>* psymval, | |
634 | typename elfcpp::Elf_types<size>::Elf_Addr addend) | |
635 | { | |
636 | This::template rela<16>(view, 16, 0xffff, object, psymval, addend); | |
637 | } | |
638 | ||
639 | // R_POWERPC_ADDR16_HA: Same as R_POWERPC_ADDR16_HI except that if the | |
640 | // final value of the low 16 bits of the | |
641 | // relocation is negative, add one. | |
642 | static inline void | |
643 | addr16_ha(unsigned char* view, | |
644 | typename elfcpp::Elf_types<size>::Elf_Addr value, | |
645 | typename elfcpp::Elf_types<size>::Elf_Addr addend) | |
646 | { | |
42cacb20 DE |
647 | typename elfcpp::Elf_types<size>::Elf_Addr reloc; |
648 | ||
649 | reloc = value + addend; | |
650 | ||
651 | if (reloc & 0x8000) | |
652 | reloc += 0x10000; | |
653 | reloc >>= 16; | |
654 | ||
e6fde208 | 655 | elfcpp::Swap<16, big_endian>::writeval(view, reloc); |
42cacb20 DE |
656 | } |
657 | ||
658 | static inline void | |
659 | addr16_ha(unsigned char* view, | |
660 | const Sized_relobj<size, big_endian>* object, | |
661 | const Symbol_value<size>* psymval, | |
662 | typename elfcpp::Elf_types<size>::Elf_Addr addend) | |
663 | { | |
42cacb20 DE |
664 | typename elfcpp::Elf_types<size>::Elf_Addr reloc; |
665 | ||
666 | reloc = psymval->value(object, addend); | |
667 | ||
668 | if (reloc & 0x8000) | |
669 | reloc += 0x10000; | |
670 | reloc >>= 16; | |
671 | ||
e6fde208 | 672 | elfcpp::Swap<16, big_endian>::writeval(view, reloc); |
42cacb20 DE |
673 | } |
674 | ||
675 | // R_PPC_REL16: (Symbol + Addend - Address) & 0xffff | |
676 | static inline void | |
677 | rel16(unsigned char* view, | |
678 | const Sized_relobj<size, big_endian>* object, | |
679 | const Symbol_value<size>* psymval, | |
680 | typename elfcpp::Elf_types<size>::Elf_Addr addend, | |
681 | typename elfcpp::Elf_types<size>::Elf_Addr address) | |
682 | { This_reloc::pcrela16(view, object, psymval, addend, address); } | |
683 | ||
684 | // R_PPC_REL16_LO: (Symbol + Addend - Address) & 0xffff | |
685 | static inline void | |
686 | rel16_lo(unsigned char* view, | |
687 | const Sized_relobj<size, big_endian>* object, | |
688 | const Symbol_value<size>* psymval, | |
689 | typename elfcpp::Elf_types<size>::Elf_Addr addend, | |
690 | typename elfcpp::Elf_types<size>::Elf_Addr address) | |
691 | { This_reloc::pcrela16(view, object, psymval, addend, address); } | |
692 | ||
693 | // R_PPC_REL16_HI: ((Symbol + Addend - Address) >> 16) & 0xffff | |
694 | static inline void | |
695 | rel16_hi(unsigned char* view, | |
696 | const Sized_relobj<size, big_endian>* object, | |
697 | const Symbol_value<size>* psymval, | |
698 | typename elfcpp::Elf_types<size>::Elf_Addr addend, | |
699 | typename elfcpp::Elf_types<size>::Elf_Addr address) | |
700 | { | |
701 | This::template pcrela<16>(view, 16, 0xffff, object, | |
702 | psymval, addend, address); | |
703 | } | |
704 | ||
705 | // R_PPC_REL16_HA: Same as R_PPC_REL16_HI except that if the | |
706 | // final value of the low 16 bits of the | |
707 | // relocation is negative, add one. | |
708 | static inline void | |
709 | rel16_ha(unsigned char* view, | |
710 | const Sized_relobj<size, big_endian>* object, | |
711 | const Symbol_value<size>* psymval, | |
712 | typename elfcpp::Elf_types<size>::Elf_Addr addend, | |
713 | typename elfcpp::Elf_types<size>::Elf_Addr address) | |
714 | { | |
42cacb20 DE |
715 | typename elfcpp::Elf_types<size>::Elf_Addr reloc; |
716 | ||
717 | reloc = (psymval->value(object, addend) - address); | |
718 | if (reloc & 0x8000) | |
719 | reloc += 0x10000; | |
720 | reloc >>= 16; | |
721 | ||
83d22aa8 | 722 | elfcpp::Swap<16, big_endian>::writeval(view, reloc); |
42cacb20 DE |
723 | } |
724 | }; | |
725 | ||
726 | // Get the GOT section, creating it if necessary. | |
727 | ||
728 | template<int size, bool big_endian> | |
729 | Output_data_got<size, big_endian>* | |
730 | Target_powerpc<size, big_endian>::got_section(Symbol_table* symtab, | |
731 | Layout* layout) | |
732 | { | |
733 | if (this->got_ == NULL) | |
734 | { | |
735 | gold_assert(symtab != NULL && layout != NULL); | |
736 | ||
737 | this->got_ = new Output_data_got<size, big_endian>(); | |
738 | ||
739 | layout->add_output_section_data(".got", elfcpp::SHT_PROGBITS, | |
740 | elfcpp::SHF_ALLOC | elfcpp::SHF_WRITE, | |
1a2dff53 | 741 | this->got_, false, false, false, false); |
42cacb20 DE |
742 | |
743 | // Create the GOT2 or TOC in the .got section. | |
744 | if (size == 32) | |
745 | { | |
746 | this->got2_ = new Output_data_space(4, "** GOT2"); | |
747 | layout->add_output_section_data(".got2", elfcpp::SHT_PROGBITS, | |
748 | elfcpp::SHF_ALLOC | |
749 | | elfcpp::SHF_WRITE, | |
1a2dff53 ILT |
750 | this->got2_, false, false, false, |
751 | false); | |
42cacb20 DE |
752 | } |
753 | else | |
754 | { | |
755 | this->toc_ = new Output_data_space(8, "** TOC"); | |
756 | layout->add_output_section_data(".toc", elfcpp::SHT_PROGBITS, | |
757 | elfcpp::SHF_ALLOC | |
758 | | elfcpp::SHF_WRITE, | |
1a2dff53 ILT |
759 | this->toc_, false, false, false, |
760 | false); | |
42cacb20 DE |
761 | } |
762 | ||
763 | // Define _GLOBAL_OFFSET_TABLE_ at the start of the .got section. | |
764 | symtab->define_in_output_data("_GLOBAL_OFFSET_TABLE_", NULL, | |
99fff23b | 765 | Symbol_table::PREDEFINED, |
42cacb20 DE |
766 | this->got_, |
767 | 0, 0, elfcpp::STT_OBJECT, | |
768 | elfcpp::STB_LOCAL, | |
769 | elfcpp::STV_HIDDEN, 0, | |
770 | false, false); | |
771 | } | |
772 | ||
773 | return this->got_; | |
774 | } | |
775 | ||
776 | // Get the dynamic reloc section, creating it if necessary. | |
777 | ||
778 | template<int size, bool big_endian> | |
779 | typename Target_powerpc<size, big_endian>::Reloc_section* | |
780 | Target_powerpc<size, big_endian>::rela_dyn_section(Layout* layout) | |
781 | { | |
782 | if (this->rela_dyn_ == NULL) | |
783 | { | |
784 | gold_assert(layout != NULL); | |
785 | this->rela_dyn_ = new Reloc_section(parameters->options().combreloc()); | |
786 | layout->add_output_section_data(".rela.dyn", elfcpp::SHT_RELA, | |
1a2dff53 ILT |
787 | elfcpp::SHF_ALLOC, this->rela_dyn_, true, |
788 | false, false, false); | |
42cacb20 DE |
789 | } |
790 | return this->rela_dyn_; | |
791 | } | |
792 | ||
793 | // A class to handle the PLT data. | |
794 | ||
795 | template<int size, bool big_endian> | |
796 | class Output_data_plt_powerpc : public Output_section_data | |
797 | { | |
798 | public: | |
799 | typedef Output_data_reloc<elfcpp::SHT_RELA, true, | |
800 | size, big_endian> Reloc_section; | |
801 | ||
802 | Output_data_plt_powerpc(Layout*); | |
803 | ||
804 | // Add an entry to the PLT. | |
805 | void add_entry(Symbol* gsym); | |
806 | ||
807 | // Return the .rela.plt section data. | |
808 | const Reloc_section* rel_plt() const | |
809 | { | |
810 | return this->rel_; | |
811 | } | |
812 | ||
813 | protected: | |
814 | void do_adjust_output_section(Output_section* os); | |
815 | ||
816 | private: | |
817 | // The size of an entry in the PLT. | |
818 | static const int base_plt_entry_size = (size == 32 ? 16 : 24); | |
819 | ||
820 | // Set the final size. | |
821 | void | |
822 | set_final_data_size() | |
823 | { | |
824 | unsigned int full_count = this->count_ + 4; | |
825 | ||
826 | this->set_data_size(full_count * base_plt_entry_size); | |
827 | } | |
828 | ||
829 | // Write out the PLT data. | |
830 | void | |
831 | do_write(Output_file*); | |
832 | ||
833 | // The reloc section. | |
834 | Reloc_section* rel_; | |
835 | // The number of PLT entries. | |
836 | unsigned int count_; | |
837 | }; | |
838 | ||
839 | // Create the PLT section. The ordinary .got section is an argument, | |
840 | // since we need to refer to the start. | |
841 | ||
842 | template<int size, bool big_endian> | |
843 | Output_data_plt_powerpc<size, big_endian>::Output_data_plt_powerpc(Layout* layout) | |
844 | : Output_section_data(size == 32 ? 4 : 8), count_(0) | |
845 | { | |
846 | this->rel_ = new Reloc_section(false); | |
847 | layout->add_output_section_data(".rela.plt", elfcpp::SHT_RELA, | |
1a2dff53 ILT |
848 | elfcpp::SHF_ALLOC, this->rel_, true, false, |
849 | false, false); | |
42cacb20 DE |
850 | } |
851 | ||
852 | template<int size, bool big_endian> | |
853 | void | |
854 | Output_data_plt_powerpc<size, big_endian>::do_adjust_output_section(Output_section* os) | |
855 | { | |
856 | os->set_entsize(0); | |
857 | } | |
858 | ||
859 | // Add an entry to the PLT. | |
860 | ||
861 | template<int size, bool big_endian> | |
862 | void | |
863 | Output_data_plt_powerpc<size, big_endian>::add_entry(Symbol* gsym) | |
864 | { | |
865 | gold_assert(!gsym->has_plt_offset()); | |
866 | unsigned int index = this->count_+ + 4; | |
867 | section_offset_type plt_offset; | |
868 | ||
869 | if (index < 8192) | |
870 | plt_offset = index * base_plt_entry_size; | |
871 | else | |
872 | gold_unreachable(); | |
873 | ||
874 | gsym->set_plt_offset(plt_offset); | |
875 | ||
876 | ++this->count_; | |
877 | ||
878 | gsym->set_needs_dynsym_entry(); | |
879 | this->rel_->add_global(gsym, elfcpp::R_POWERPC_JMP_SLOT, this, | |
880 | plt_offset, 0); | |
881 | } | |
882 | ||
883 | static const unsigned int addis_11_11 = 0x3d6b0000; | |
884 | static const unsigned int addis_11_30 = 0x3d7e0000; | |
885 | static const unsigned int addis_12_12 = 0x3d8c0000; | |
886 | static const unsigned int addi_11_11 = 0x396b0000; | |
887 | static const unsigned int add_0_11_11 = 0x7c0b5a14; | |
888 | static const unsigned int add_11_0_11 = 0x7d605a14; | |
889 | static const unsigned int b = 0x48000000; | |
890 | static const unsigned int bcl_20_31 = 0x429f0005; | |
891 | static const unsigned int bctr = 0x4e800420; | |
892 | static const unsigned int lis_11 = 0x3d600000; | |
893 | static const unsigned int lis_12 = 0x3d800000; | |
894 | static const unsigned int lwzu_0_12 = 0x840c0000; | |
895 | static const unsigned int lwz_0_12 = 0x800c0000; | |
896 | static const unsigned int lwz_11_11 = 0x816b0000; | |
897 | static const unsigned int lwz_11_30 = 0x817e0000; | |
898 | static const unsigned int lwz_12_12 = 0x818c0000; | |
899 | static const unsigned int mflr_0 = 0x7c0802a6; | |
900 | static const unsigned int mflr_12 = 0x7d8802a6; | |
901 | static const unsigned int mtctr_0 = 0x7c0903a6; | |
902 | static const unsigned int mtctr_11 = 0x7d6903a6; | |
903 | static const unsigned int mtlr_0 = 0x7c0803a6; | |
904 | static const unsigned int nop = 0x60000000; | |
905 | static const unsigned int sub_11_11_12 = 0x7d6c5850; | |
906 | ||
907 | static const unsigned int addis_r12_r2 = 0x3d820000; /* addis %r12,%r2,xxx@ha */ | |
908 | static const unsigned int std_r2_40r1 = 0xf8410028; /* std %r2,40(%r1) */ | |
909 | static const unsigned int ld_r11_0r12 = 0xe96c0000; /* ld %r11,xxx+0@l(%r12) */ | |
910 | static const unsigned int ld_r2_0r12 = 0xe84c0000; /* ld %r2,xxx+8@l(%r12) */ | |
911 | /* ld %r11,xxx+16@l(%r12) */ | |
912 | ||
913 | ||
914 | // Write out the PLT. | |
915 | ||
916 | template<int size, bool big_endian> | |
917 | void | |
918 | Output_data_plt_powerpc<size, big_endian>::do_write(Output_file* of) | |
919 | { | |
2ea97941 | 920 | const off_t offset = this->offset(); |
42cacb20 DE |
921 | const section_size_type oview_size = |
922 | convert_to_section_size_type(this->data_size()); | |
2ea97941 | 923 | unsigned char* const oview = of->get_output_view(offset, oview_size); |
42cacb20 DE |
924 | unsigned char* pov = oview; |
925 | ||
926 | memset(pov, 0, base_plt_entry_size * 4); | |
927 | pov += base_plt_entry_size * 4; | |
928 | ||
929 | unsigned int plt_offset = base_plt_entry_size * 4; | |
930 | const unsigned int count = this->count_; | |
931 | ||
932 | if (size == 64) | |
933 | { | |
934 | for (unsigned int i = 0; i < count; i++) | |
935 | { | |
936 | } | |
937 | } | |
938 | else | |
939 | { | |
940 | for (unsigned int i = 0; i < count; i++) | |
941 | { | |
942 | elfcpp::Swap<32, true>::writeval(pov + 0x00, | |
943 | lwz_11_30 + plt_offset); | |
944 | elfcpp::Swap<32, true>::writeval(pov + 0x04, mtctr_11); | |
945 | elfcpp::Swap<32, true>::writeval(pov + 0x08, bctr); | |
ce3ac18a | 946 | elfcpp::Swap<32, true>::writeval(pov + 0x0c, nop); |
42cacb20 DE |
947 | pov += base_plt_entry_size; |
948 | plt_offset += base_plt_entry_size; | |
949 | } | |
950 | } | |
951 | ||
952 | gold_assert(static_cast<section_size_type>(pov - oview) == oview_size); | |
953 | ||
2ea97941 | 954 | of->write_output_view(offset, oview_size, oview); |
42cacb20 DE |
955 | } |
956 | ||
957 | // Create a PLT entry for a global symbol. | |
958 | ||
959 | template<int size, bool big_endian> | |
960 | void | |
961 | Target_powerpc<size, big_endian>::make_plt_entry(Symbol_table* symtab, | |
962 | Layout* layout, | |
963 | Symbol* gsym) | |
964 | { | |
965 | if (gsym->has_plt_offset()) | |
966 | return; | |
967 | ||
968 | if (this->plt_ == NULL) | |
969 | { | |
970 | // Create the GOT section first. | |
971 | this->got_section(symtab, layout); | |
972 | ||
612a8d3d DM |
973 | // Ensure that .rela.dyn always appears before .rela.plt This is |
974 | // necessary due to how, on PowerPC and some other targets, .rela.dyn | |
975 | // needs to include .rela.plt in it's range. | |
976 | this->rela_dyn_section(layout); | |
977 | ||
42cacb20 DE |
978 | this->plt_ = new Output_data_plt_powerpc<size, big_endian>(layout); |
979 | layout->add_output_section_data(".plt", elfcpp::SHT_PROGBITS, | |
980 | (elfcpp::SHF_ALLOC | |
981 | | elfcpp::SHF_EXECINSTR | |
982 | | elfcpp::SHF_WRITE), | |
1a2dff53 | 983 | this->plt_, false, false, false, false); |
42cacb20 DE |
984 | |
985 | // Define _PROCEDURE_LINKAGE_TABLE_ at the start of the .plt section. | |
986 | symtab->define_in_output_data("_PROCEDURE_LINKAGE_TABLE_", NULL, | |
99fff23b | 987 | Symbol_table::PREDEFINED, |
42cacb20 DE |
988 | this->plt_, |
989 | 0, 0, elfcpp::STT_OBJECT, | |
990 | elfcpp::STB_LOCAL, | |
991 | elfcpp::STV_HIDDEN, 0, | |
992 | false, false); | |
993 | } | |
994 | ||
995 | this->plt_->add_entry(gsym); | |
996 | } | |
997 | ||
998 | // Create a GOT entry for the TLS module index. | |
999 | ||
1000 | template<int size, bool big_endian> | |
1001 | unsigned int | |
1002 | Target_powerpc<size, big_endian>::got_mod_index_entry(Symbol_table* symtab, | |
1003 | Layout* layout, | |
1004 | Sized_relobj<size, big_endian>* object) | |
1005 | { | |
1006 | if (this->got_mod_index_offset_ == -1U) | |
1007 | { | |
1008 | gold_assert(symtab != NULL && layout != NULL && object != NULL); | |
1009 | Reloc_section* rela_dyn = this->rela_dyn_section(layout); | |
1010 | Output_data_got<size, big_endian>* got; | |
1011 | unsigned int got_offset; | |
1012 | ||
1013 | got = this->got_section(symtab, layout); | |
1014 | got_offset = got->add_constant(0); | |
1015 | rela_dyn->add_local(object, 0, elfcpp::R_POWERPC_DTPMOD, got, | |
1016 | got_offset, 0); | |
1017 | got->add_constant(0); | |
1018 | this->got_mod_index_offset_ = got_offset; | |
1019 | } | |
1020 | return this->got_mod_index_offset_; | |
1021 | } | |
1022 | ||
1023 | // Optimize the TLS relocation type based on what we know about the | |
1024 | // symbol. IS_FINAL is true if the final address of this symbol is | |
1025 | // known at link time. | |
1026 | ||
1027 | static tls::Tls_optimization | |
1028 | optimize_tls_reloc(bool /* is_final */, int r_type) | |
1029 | { | |
1030 | // If we are generating a shared library, then we can't do anything | |
1031 | // in the linker. | |
1032 | if (parameters->options().shared()) | |
1033 | return tls::TLSOPT_NONE; | |
1034 | switch (r_type) | |
1035 | { | |
1036 | // XXX | |
1037 | default: | |
1038 | gold_unreachable(); | |
1039 | } | |
1040 | } | |
1041 | ||
1042 | // Report an unsupported relocation against a local symbol. | |
1043 | ||
1044 | template<int size, bool big_endian> | |
1045 | void | |
1046 | Target_powerpc<size, big_endian>::Scan::unsupported_reloc_local( | |
1047 | Sized_relobj<size, big_endian>* object, | |
1048 | unsigned int r_type) | |
1049 | { | |
1050 | gold_error(_("%s: unsupported reloc %u against local symbol"), | |
1051 | object->name().c_str(), r_type); | |
1052 | } | |
1053 | ||
1054 | // We are about to emit a dynamic relocation of type R_TYPE. If the | |
1055 | // dynamic linker does not support it, issue an error. | |
1056 | ||
1057 | template<int size, bool big_endian> | |
1058 | void | |
1059 | Target_powerpc<size, big_endian>::Scan::check_non_pic(Relobj* object, | |
1060 | unsigned int r_type) | |
1061 | { | |
1062 | gold_assert(r_type != elfcpp::R_POWERPC_NONE); | |
1063 | ||
1064 | // These are the relocation types supported by glibc for both 32-bit | |
1065 | // and 64-bit powerpc. | |
1066 | switch (r_type) | |
1067 | { | |
1068 | case elfcpp::R_POWERPC_RELATIVE: | |
1069 | case elfcpp::R_POWERPC_GLOB_DAT: | |
1070 | case elfcpp::R_POWERPC_DTPMOD: | |
1071 | case elfcpp::R_POWERPC_DTPREL: | |
1072 | case elfcpp::R_POWERPC_TPREL: | |
1073 | case elfcpp::R_POWERPC_JMP_SLOT: | |
1074 | case elfcpp::R_POWERPC_COPY: | |
1075 | case elfcpp::R_POWERPC_ADDR32: | |
1076 | case elfcpp::R_POWERPC_ADDR24: | |
1077 | case elfcpp::R_POWERPC_REL24: | |
1078 | return; | |
1079 | ||
1080 | default: | |
1081 | break; | |
1082 | } | |
1083 | ||
1084 | if (size == 64) | |
1085 | { | |
1086 | switch (r_type) | |
1087 | { | |
1088 | // These are the relocation types supported only on 64-bit. | |
1089 | case elfcpp::R_PPC64_ADDR64: | |
1090 | case elfcpp::R_PPC64_TPREL16_LO_DS: | |
1091 | case elfcpp::R_PPC64_TPREL16_DS: | |
1092 | case elfcpp::R_POWERPC_TPREL16: | |
1093 | case elfcpp::R_POWERPC_TPREL16_LO: | |
1094 | case elfcpp::R_POWERPC_TPREL16_HI: | |
1095 | case elfcpp::R_POWERPC_TPREL16_HA: | |
1096 | case elfcpp::R_PPC64_TPREL16_HIGHER: | |
1097 | case elfcpp::R_PPC64_TPREL16_HIGHEST: | |
1098 | case elfcpp::R_PPC64_TPREL16_HIGHERA: | |
1099 | case elfcpp::R_PPC64_TPREL16_HIGHESTA: | |
1100 | case elfcpp::R_PPC64_ADDR16_LO_DS: | |
1101 | case elfcpp::R_POWERPC_ADDR16_LO: | |
1102 | case elfcpp::R_POWERPC_ADDR16_HI: | |
1103 | case elfcpp::R_POWERPC_ADDR16_HA: | |
1104 | case elfcpp::R_POWERPC_ADDR30: | |
1105 | case elfcpp::R_PPC64_UADDR64: | |
1106 | case elfcpp::R_POWERPC_UADDR32: | |
1107 | case elfcpp::R_POWERPC_ADDR16: | |
1108 | case elfcpp::R_POWERPC_UADDR16: | |
1109 | case elfcpp::R_PPC64_ADDR16_DS: | |
1110 | case elfcpp::R_PPC64_ADDR16_HIGHER: | |
1111 | case elfcpp::R_PPC64_ADDR16_HIGHEST: | |
1112 | case elfcpp::R_PPC64_ADDR16_HIGHERA: | |
1113 | case elfcpp::R_PPC64_ADDR16_HIGHESTA: | |
1114 | case elfcpp::R_POWERPC_ADDR14_BRTAKEN: | |
1115 | case elfcpp::R_POWERPC_ADDR14_BRNTAKEN: | |
1116 | case elfcpp::R_POWERPC_REL32: | |
1117 | case elfcpp::R_PPC64_REL64: | |
1118 | return; | |
1119 | ||
1120 | default: | |
1121 | break; | |
1122 | } | |
1123 | } | |
1124 | else | |
1125 | { | |
1126 | switch (r_type) | |
1127 | { | |
1128 | // These are the relocation types supported only on 32-bit. | |
1129 | ||
1130 | default: | |
1131 | break; | |
1132 | } | |
1133 | } | |
1134 | ||
1135 | // This prevents us from issuing more than one error per reloc | |
1136 | // section. But we can still wind up issuing more than one | |
1137 | // error per object file. | |
1138 | if (this->issued_non_pic_error_) | |
1139 | return; | |
33aea2fd | 1140 | gold_assert(parameters->options().output_is_position_independent()); |
42cacb20 DE |
1141 | object->error(_("requires unsupported dynamic reloc; " |
1142 | "recompile with -fPIC")); | |
1143 | this->issued_non_pic_error_ = true; | |
1144 | return; | |
1145 | } | |
1146 | ||
1147 | // Scan a relocation for a local symbol. | |
1148 | ||
1149 | template<int size, bool big_endian> | |
1150 | inline void | |
1151 | Target_powerpc<size, big_endian>::Scan::local( | |
42cacb20 DE |
1152 | Symbol_table* symtab, |
1153 | Layout* layout, | |
1154 | Target_powerpc<size, big_endian>* target, | |
1155 | Sized_relobj<size, big_endian>* object, | |
1156 | unsigned int data_shndx, | |
1157 | Output_section* output_section, | |
1158 | const elfcpp::Rela<size, big_endian>& reloc, | |
1159 | unsigned int r_type, | |
1160 | const elfcpp::Sym<size, big_endian>& lsym) | |
1161 | { | |
1162 | switch (r_type) | |
1163 | { | |
1164 | case elfcpp::R_POWERPC_NONE: | |
1165 | case elfcpp::R_POWERPC_GNU_VTINHERIT: | |
1166 | case elfcpp::R_POWERPC_GNU_VTENTRY: | |
1167 | break; | |
1168 | ||
1169 | case elfcpp::R_PPC64_ADDR64: | |
1170 | case elfcpp::R_POWERPC_ADDR32: | |
1171 | case elfcpp::R_POWERPC_ADDR16_HA: | |
1172 | case elfcpp::R_POWERPC_ADDR16_LO: | |
1173 | // If building a shared library (or a position-independent | |
1174 | // executable), we need to create a dynamic relocation for | |
1175 | // this location. | |
1176 | if (parameters->options().output_is_position_independent()) | |
1177 | { | |
1178 | Reloc_section* rela_dyn = target->rela_dyn_section(layout); | |
1179 | ||
1180 | check_non_pic(object, r_type); | |
1181 | if (lsym.get_st_type() != elfcpp::STT_SECTION) | |
1182 | { | |
1183 | unsigned int r_sym = elfcpp::elf_r_sym<size>(reloc.get_r_info()); | |
1184 | rela_dyn->add_local(object, r_sym, r_type, output_section, | |
1185 | data_shndx, reloc.get_r_offset(), | |
1186 | reloc.get_r_addend()); | |
1187 | } | |
1188 | else | |
1189 | { | |
1190 | unsigned int r_sym = elfcpp::elf_r_sym<size>(reloc.get_r_info()); | |
1191 | gold_assert(lsym.get_st_value() == 0); | |
1192 | rela_dyn->add_local_relative(object, r_sym, r_type, | |
1193 | output_section, data_shndx, | |
1194 | reloc.get_r_offset(), | |
1195 | reloc.get_r_addend()); | |
1196 | } | |
1197 | } | |
1198 | break; | |
1199 | ||
1200 | case elfcpp::R_POWERPC_REL24: | |
1201 | case elfcpp::R_PPC_LOCAL24PC: | |
1202 | case elfcpp::R_POWERPC_REL32: | |
1203 | case elfcpp::R_PPC_REL16_LO: | |
1204 | case elfcpp::R_PPC_REL16_HA: | |
1205 | break; | |
1206 | ||
1207 | case elfcpp::R_POWERPC_GOT16: | |
1208 | case elfcpp::R_POWERPC_GOT16_LO: | |
1209 | case elfcpp::R_POWERPC_GOT16_HI: | |
1210 | case elfcpp::R_POWERPC_GOT16_HA: | |
1211 | case elfcpp::R_PPC64_TOC16: | |
1212 | case elfcpp::R_PPC64_TOC16_LO: | |
1213 | case elfcpp::R_PPC64_TOC16_HI: | |
1214 | case elfcpp::R_PPC64_TOC16_HA: | |
1215 | case elfcpp::R_PPC64_TOC16_DS: | |
1216 | case elfcpp::R_PPC64_TOC16_LO_DS: | |
1217 | { | |
1218 | // The symbol requires a GOT entry. | |
1219 | Output_data_got<size, big_endian>* got; | |
1220 | unsigned int r_sym; | |
1221 | ||
1222 | got = target->got_section(symtab, layout); | |
1223 | r_sym = elfcpp::elf_r_sym<size>(reloc.get_r_info()); | |
1224 | ||
1225 | // If we are generating a shared object, we need to add a | |
1226 | // dynamic relocation for this symbol's GOT entry. | |
1227 | if (parameters->options().output_is_position_independent()) | |
1228 | { | |
1229 | if (!object->local_has_got_offset(r_sym, GOT_TYPE_STANDARD)) | |
1230 | { | |
1231 | Reloc_section* rela_dyn = target->rela_dyn_section(layout); | |
1232 | unsigned int off; | |
1233 | ||
1234 | off = got->add_constant(0); | |
1235 | object->set_local_got_offset(r_sym, GOT_TYPE_STANDARD, off); | |
1236 | rela_dyn->add_local_relative(object, r_sym, | |
1237 | elfcpp::R_POWERPC_RELATIVE, | |
1238 | got, off, 0); | |
1239 | } | |
1240 | } | |
1241 | else | |
1242 | got->add_local(object, r_sym, GOT_TYPE_STANDARD); | |
1243 | } | |
1244 | break; | |
1245 | ||
1246 | case elfcpp::R_PPC64_TOC: | |
1247 | // We need a GOT section. | |
1248 | target->got_section(symtab, layout); | |
1249 | break; | |
1250 | ||
1251 | // These are relocations which should only be seen by the | |
1252 | // dynamic linker, and should never be seen here. | |
1253 | case elfcpp::R_POWERPC_COPY: | |
1254 | case elfcpp::R_POWERPC_GLOB_DAT: | |
1255 | case elfcpp::R_POWERPC_JMP_SLOT: | |
1256 | case elfcpp::R_POWERPC_RELATIVE: | |
1257 | case elfcpp::R_POWERPC_DTPMOD: | |
1258 | gold_error(_("%s: unexpected reloc %u in object file"), | |
1259 | object->name().c_str(), r_type); | |
1260 | break; | |
1261 | ||
1262 | default: | |
1263 | unsupported_reloc_local(object, r_type); | |
1264 | break; | |
1265 | } | |
1266 | } | |
1267 | ||
1268 | // Report an unsupported relocation against a global symbol. | |
1269 | ||
1270 | template<int size, bool big_endian> | |
1271 | void | |
1272 | Target_powerpc<size, big_endian>::Scan::unsupported_reloc_global( | |
1273 | Sized_relobj<size, big_endian>* object, | |
1274 | unsigned int r_type, | |
1275 | Symbol* gsym) | |
1276 | { | |
1277 | gold_error(_("%s: unsupported reloc %u against global symbol %s"), | |
1278 | object->name().c_str(), r_type, gsym->demangled_name().c_str()); | |
1279 | } | |
1280 | ||
1281 | // Scan a relocation for a global symbol. | |
1282 | ||
1283 | template<int size, bool big_endian> | |
1284 | inline void | |
1285 | Target_powerpc<size, big_endian>::Scan::global( | |
42cacb20 DE |
1286 | Symbol_table* symtab, |
1287 | Layout* layout, | |
1288 | Target_powerpc<size, big_endian>* target, | |
1289 | Sized_relobj<size, big_endian>* object, | |
1290 | unsigned int data_shndx, | |
1291 | Output_section* output_section, | |
1292 | const elfcpp::Rela<size, big_endian>& reloc, | |
1293 | unsigned int r_type, | |
1294 | Symbol* gsym) | |
1295 | { | |
1296 | switch (r_type) | |
1297 | { | |
1298 | case elfcpp::R_POWERPC_NONE: | |
1299 | case elfcpp::R_POWERPC_GNU_VTINHERIT: | |
1300 | case elfcpp::R_POWERPC_GNU_VTENTRY: | |
1301 | break; | |
1302 | ||
1303 | case elfcpp::R_PPC_PLTREL24: | |
1304 | // If the symbol is fully resolved, this is just a PC32 reloc. | |
1305 | // Otherwise we need a PLT entry. | |
1306 | if (gsym->final_value_is_known()) | |
1307 | break; | |
1308 | // If building a shared library, we can also skip the PLT entry | |
1309 | // if the symbol is defined in the output file and is protected | |
1310 | // or hidden. | |
1311 | if (gsym->is_defined() | |
1312 | && !gsym->is_from_dynobj() | |
1313 | && !gsym->is_preemptible()) | |
1314 | break; | |
1315 | target->make_plt_entry(symtab, layout, gsym); | |
1316 | break; | |
1317 | ||
1318 | case elfcpp::R_POWERPC_ADDR16: | |
1319 | case elfcpp::R_POWERPC_ADDR16_LO: | |
1320 | case elfcpp::R_POWERPC_ADDR16_HI: | |
1321 | case elfcpp::R_POWERPC_ADDR16_HA: | |
1322 | case elfcpp::R_POWERPC_ADDR32: | |
1323 | case elfcpp::R_PPC64_ADDR64: | |
1324 | { | |
1325 | // Make a PLT entry if necessary. | |
1326 | if (gsym->needs_plt_entry()) | |
1327 | { | |
1328 | target->make_plt_entry(symtab, layout, gsym); | |
1329 | // Since this is not a PC-relative relocation, we may be | |
1330 | // taking the address of a function. In that case we need to | |
1331 | // set the entry in the dynamic symbol table to the address of | |
1332 | // the PLT entry. | |
1333 | if (gsym->is_from_dynobj() && !parameters->options().shared()) | |
1334 | gsym->set_needs_dynsym_value(); | |
1335 | } | |
1336 | // Make a dynamic relocation if necessary. | |
1337 | if (gsym->needs_dynamic_reloc(Symbol::ABSOLUTE_REF)) | |
1338 | { | |
966d4097 | 1339 | if (gsym->may_need_copy_reloc()) |
42cacb20 DE |
1340 | { |
1341 | target->copy_reloc(symtab, layout, object, | |
1342 | data_shndx, output_section, gsym, reloc); | |
1343 | } | |
1344 | else if ((r_type == elfcpp::R_POWERPC_ADDR32 | |
1345 | || r_type == elfcpp::R_PPC64_ADDR64) | |
1346 | && gsym->can_use_relative_reloc(false)) | |
1347 | { | |
1348 | Reloc_section* rela_dyn = target->rela_dyn_section(layout); | |
1349 | rela_dyn->add_global_relative(gsym, elfcpp::R_POWERPC_RELATIVE, | |
1350 | output_section, object, | |
1351 | data_shndx, reloc.get_r_offset(), | |
1352 | reloc.get_r_addend()); | |
1353 | } | |
1354 | else | |
1355 | { | |
1356 | Reloc_section* rela_dyn = target->rela_dyn_section(layout); | |
1357 | ||
1358 | check_non_pic(object, r_type); | |
1359 | if (gsym->is_from_dynobj() | |
1360 | || gsym->is_undefined() | |
1361 | || gsym->is_preemptible()) | |
1362 | rela_dyn->add_global(gsym, r_type, output_section, | |
1363 | object, data_shndx, | |
1364 | reloc.get_r_offset(), | |
1365 | reloc.get_r_addend()); | |
1366 | else | |
1367 | rela_dyn->add_global_relative(gsym, r_type, | |
1368 | output_section, object, | |
1369 | data_shndx, | |
1370 | reloc.get_r_offset(), | |
1371 | reloc.get_r_addend()); | |
1372 | } | |
1373 | } | |
1374 | } | |
1375 | break; | |
1376 | ||
1377 | case elfcpp::R_POWERPC_REL24: | |
1378 | case elfcpp::R_PPC_LOCAL24PC: | |
1379 | case elfcpp::R_PPC_REL16: | |
1380 | case elfcpp::R_PPC_REL16_LO: | |
1381 | case elfcpp::R_PPC_REL16_HI: | |
1382 | case elfcpp::R_PPC_REL16_HA: | |
1383 | { | |
1384 | if (gsym->needs_plt_entry()) | |
1385 | target->make_plt_entry(symtab, layout, gsym); | |
1386 | // Make a dynamic relocation if necessary. | |
1387 | int flags = Symbol::NON_PIC_REF; | |
1388 | if (gsym->type() == elfcpp::STT_FUNC) | |
1389 | flags |= Symbol::FUNCTION_CALL; | |
1390 | if (gsym->needs_dynamic_reloc(flags)) | |
1391 | { | |
966d4097 | 1392 | if (gsym->may_need_copy_reloc()) |
42cacb20 DE |
1393 | { |
1394 | target->copy_reloc(symtab, layout, object, | |
1395 | data_shndx, output_section, gsym, | |
1396 | reloc); | |
1397 | } | |
1398 | else | |
1399 | { | |
1400 | Reloc_section* rela_dyn = target->rela_dyn_section(layout); | |
1401 | check_non_pic(object, r_type); | |
1402 | rela_dyn->add_global(gsym, r_type, output_section, object, | |
1403 | data_shndx, reloc.get_r_offset(), | |
1404 | reloc.get_r_addend()); | |
1405 | } | |
1406 | } | |
1407 | } | |
1408 | break; | |
1409 | ||
1410 | case elfcpp::R_POWERPC_GOT16: | |
1411 | case elfcpp::R_POWERPC_GOT16_LO: | |
1412 | case elfcpp::R_POWERPC_GOT16_HI: | |
1413 | case elfcpp::R_POWERPC_GOT16_HA: | |
1414 | case elfcpp::R_PPC64_TOC16: | |
1415 | case elfcpp::R_PPC64_TOC16_LO: | |
1416 | case elfcpp::R_PPC64_TOC16_HI: | |
1417 | case elfcpp::R_PPC64_TOC16_HA: | |
1418 | case elfcpp::R_PPC64_TOC16_DS: | |
1419 | case elfcpp::R_PPC64_TOC16_LO_DS: | |
1420 | { | |
1421 | // The symbol requires a GOT entry. | |
1422 | Output_data_got<size, big_endian>* got; | |
1423 | ||
1424 | got = target->got_section(symtab, layout); | |
1425 | if (gsym->final_value_is_known()) | |
1426 | got->add_global(gsym, GOT_TYPE_STANDARD); | |
1427 | else | |
1428 | { | |
1429 | // If this symbol is not fully resolved, we need to add a | |
1430 | // dynamic relocation for it. | |
1431 | Reloc_section* rela_dyn = target->rela_dyn_section(layout); | |
1432 | if (gsym->is_from_dynobj() | |
1433 | || gsym->is_undefined() | |
1434 | || gsym->is_preemptible()) | |
1435 | got->add_global_with_rela(gsym, GOT_TYPE_STANDARD, rela_dyn, | |
1436 | elfcpp::R_POWERPC_GLOB_DAT); | |
1437 | else if (!gsym->has_got_offset(GOT_TYPE_STANDARD)) | |
1438 | { | |
1439 | unsigned int off = got->add_constant(0); | |
1440 | ||
1441 | gsym->set_got_offset(GOT_TYPE_STANDARD, off); | |
1442 | rela_dyn->add_global_relative(gsym, elfcpp::R_POWERPC_RELATIVE, | |
1443 | got, off, 0); | |
1444 | } | |
1445 | } | |
1446 | } | |
1447 | break; | |
1448 | ||
1449 | case elfcpp::R_PPC64_TOC: | |
1450 | // We need a GOT section. | |
1451 | target->got_section(symtab, layout); | |
1452 | break; | |
1453 | ||
1454 | case elfcpp::R_POWERPC_GOT_TPREL16: | |
1455 | case elfcpp::R_POWERPC_TLS: | |
1456 | // XXX TLS | |
1457 | break; | |
1458 | ||
1459 | // These are relocations which should only be seen by the | |
1460 | // dynamic linker, and should never be seen here. | |
1461 | case elfcpp::R_POWERPC_COPY: | |
1462 | case elfcpp::R_POWERPC_GLOB_DAT: | |
1463 | case elfcpp::R_POWERPC_JMP_SLOT: | |
1464 | case elfcpp::R_POWERPC_RELATIVE: | |
1465 | case elfcpp::R_POWERPC_DTPMOD: | |
1466 | gold_error(_("%s: unexpected reloc %u in object file"), | |
1467 | object->name().c_str(), r_type); | |
1468 | break; | |
1469 | ||
1470 | default: | |
1471 | unsupported_reloc_global(object, r_type, gsym); | |
1472 | break; | |
1473 | } | |
1474 | } | |
1475 | ||
6d03d481 ST |
1476 | // Process relocations for gc. |
1477 | ||
1478 | template<int size, bool big_endian> | |
1479 | void | |
1480 | Target_powerpc<size, big_endian>::gc_process_relocs( | |
6d03d481 ST |
1481 | Symbol_table* symtab, |
1482 | Layout* layout, | |
1483 | Sized_relobj<size, big_endian>* object, | |
1484 | unsigned int data_shndx, | |
1485 | unsigned int, | |
1486 | const unsigned char* prelocs, | |
1487 | size_t reloc_count, | |
1488 | Output_section* output_section, | |
1489 | bool needs_special_offset_handling, | |
1490 | size_t local_symbol_count, | |
1491 | const unsigned char* plocal_symbols) | |
1492 | { | |
1493 | typedef Target_powerpc<size, big_endian> Powerpc; | |
2ea97941 | 1494 | typedef typename Target_powerpc<size, big_endian>::Scan Scan; |
6d03d481 | 1495 | |
2ea97941 | 1496 | gold::gc_process_relocs<size, big_endian, Powerpc, elfcpp::SHT_RELA, Scan>( |
6d03d481 ST |
1497 | symtab, |
1498 | layout, | |
1499 | this, | |
1500 | object, | |
1501 | data_shndx, | |
1502 | prelocs, | |
1503 | reloc_count, | |
1504 | output_section, | |
1505 | needs_special_offset_handling, | |
1506 | local_symbol_count, | |
1507 | plocal_symbols); | |
1508 | } | |
1509 | ||
42cacb20 DE |
1510 | // Scan relocations for a section. |
1511 | ||
1512 | template<int size, bool big_endian> | |
1513 | void | |
1514 | Target_powerpc<size, big_endian>::scan_relocs( | |
42cacb20 DE |
1515 | Symbol_table* symtab, |
1516 | Layout* layout, | |
1517 | Sized_relobj<size, big_endian>* object, | |
1518 | unsigned int data_shndx, | |
1519 | unsigned int sh_type, | |
1520 | const unsigned char* prelocs, | |
1521 | size_t reloc_count, | |
1522 | Output_section* output_section, | |
1523 | bool needs_special_offset_handling, | |
1524 | size_t local_symbol_count, | |
1525 | const unsigned char* plocal_symbols) | |
1526 | { | |
1527 | typedef Target_powerpc<size, big_endian> Powerpc; | |
2ea97941 | 1528 | typedef typename Target_powerpc<size, big_endian>::Scan Scan; |
42cacb20 DE |
1529 | static Output_data_space* sdata; |
1530 | ||
1531 | if (sh_type == elfcpp::SHT_REL) | |
1532 | { | |
1533 | gold_error(_("%s: unsupported REL reloc section"), | |
1534 | object->name().c_str()); | |
1535 | return; | |
1536 | } | |
1537 | ||
1538 | // Define _SDA_BASE_ at the start of the .sdata section. | |
1539 | if (sdata == NULL) | |
1540 | { | |
1541 | // layout->find_output_section(".sdata") == NULL | |
1542 | sdata = new Output_data_space(4, "** sdata"); | |
1543 | Output_section* os = layout->add_output_section_data(".sdata", 0, | |
1544 | elfcpp::SHF_ALLOC | |
1545 | | elfcpp::SHF_WRITE, | |
1a2dff53 ILT |
1546 | sdata, false, |
1547 | false, false, false); | |
42cacb20 | 1548 | symtab->define_in_output_data("_SDA_BASE_", NULL, |
99fff23b | 1549 | Symbol_table::PREDEFINED, |
42cacb20 DE |
1550 | os, |
1551 | 32768, 0, | |
1552 | elfcpp::STT_OBJECT, | |
1553 | elfcpp::STB_LOCAL, | |
1554 | elfcpp::STV_HIDDEN, 0, | |
1555 | false, false); | |
1556 | } | |
1557 | ||
2ea97941 | 1558 | gold::scan_relocs<size, big_endian, Powerpc, elfcpp::SHT_RELA, Scan>( |
42cacb20 DE |
1559 | symtab, |
1560 | layout, | |
1561 | this, | |
1562 | object, | |
1563 | data_shndx, | |
1564 | prelocs, | |
1565 | reloc_count, | |
1566 | output_section, | |
1567 | needs_special_offset_handling, | |
1568 | local_symbol_count, | |
1569 | plocal_symbols); | |
1570 | } | |
1571 | ||
1572 | // Finalize the sections. | |
1573 | ||
1574 | template<int size, bool big_endian> | |
1575 | void | |
d5b40221 DK |
1576 | Target_powerpc<size, big_endian>::do_finalize_sections( |
1577 | Layout* layout, | |
f59f41f3 DK |
1578 | const Input_objects*, |
1579 | Symbol_table*) | |
42cacb20 DE |
1580 | { |
1581 | // Fill in some more dynamic tags. | |
ea715a34 ILT |
1582 | const Reloc_section* rel_plt = (this->plt_ == NULL |
1583 | ? NULL | |
1584 | : this->plt_->rel_plt()); | |
1585 | layout->add_target_dynamic_tags(false, this->plt_, rel_plt, | |
612a8d3d | 1586 | this->rela_dyn_, true, size == 32); |
42cacb20 DE |
1587 | |
1588 | // Emit any relocs we saved in an attempt to avoid generating COPY | |
1589 | // relocs. | |
1590 | if (this->copy_relocs_.any_saved_relocs()) | |
1591 | this->copy_relocs_.emit(this->rela_dyn_section(layout)); | |
1592 | } | |
1593 | ||
1594 | // Perform a relocation. | |
1595 | ||
1596 | template<int size, bool big_endian> | |
1597 | inline bool | |
1598 | Target_powerpc<size, big_endian>::Relocate::relocate( | |
1599 | const Relocate_info<size, big_endian>* relinfo, | |
1600 | Target_powerpc* target, | |
031cdbed | 1601 | Output_section*, |
42cacb20 DE |
1602 | size_t relnum, |
1603 | const elfcpp::Rela<size, big_endian>& rela, | |
1604 | unsigned int r_type, | |
1605 | const Sized_symbol<size>* gsym, | |
1606 | const Symbol_value<size>* psymval, | |
1607 | unsigned char* view, | |
1608 | typename elfcpp::Elf_types<size>::Elf_Addr address, | |
1609 | section_size_type /* view_size */) | |
1610 | { | |
1611 | const unsigned int toc_base_offset = 0x8000; | |
1612 | typedef Powerpc_relocate_functions<size, big_endian> Reloc; | |
1613 | ||
1614 | // Pick the value to use for symbols defined in shared objects. | |
1615 | Symbol_value<size> symval; | |
1616 | if (gsym != NULL | |
de4c45bd ILT |
1617 | && gsym->use_plt_offset(r_type == elfcpp::R_POWERPC_REL24 |
1618 | || r_type == elfcpp::R_PPC_LOCAL24PC | |
1619 | || r_type == elfcpp::R_PPC_REL16 | |
1620 | || r_type == elfcpp::R_PPC_REL16_LO | |
1621 | || r_type == elfcpp::R_PPC_REL16_HI | |
1622 | || r_type == elfcpp::R_PPC_REL16_HA)) | |
42cacb20 DE |
1623 | { |
1624 | elfcpp::Elf_Xword value; | |
1625 | ||
1626 | value = target->plt_section()->address() + gsym->plt_offset(); | |
1627 | ||
1628 | symval.set_output_value(value); | |
1629 | ||
1630 | psymval = &symval; | |
1631 | } | |
1632 | ||
1633 | const Sized_relobj<size, big_endian>* object = relinfo->object; | |
1634 | elfcpp::Elf_Xword addend = rela.get_r_addend(); | |
1635 | ||
1636 | // Get the GOT offset if needed. Unlike i386 and x86_64, our GOT | |
1637 | // pointer points to the beginning, not the end, of the table. | |
1638 | // So we just use the plain offset. | |
1639 | bool have_got_offset = false; | |
1640 | unsigned int got_offset = 0; | |
1641 | unsigned int got2_offset = 0; | |
1642 | switch (r_type) | |
1643 | { | |
1644 | case elfcpp::R_PPC64_TOC16: | |
1645 | case elfcpp::R_PPC64_TOC16_LO: | |
1646 | case elfcpp::R_PPC64_TOC16_HI: | |
1647 | case elfcpp::R_PPC64_TOC16_HA: | |
1648 | case elfcpp::R_PPC64_TOC16_DS: | |
1649 | case elfcpp::R_PPC64_TOC16_LO_DS: | |
1650 | // Subtract the TOC base address. | |
1651 | addend -= target->toc_section()->address() + toc_base_offset; | |
1652 | /* FALLTHRU */ | |
1653 | ||
1654 | case elfcpp::R_POWERPC_GOT16: | |
1655 | case elfcpp::R_POWERPC_GOT16_LO: | |
1656 | case elfcpp::R_POWERPC_GOT16_HI: | |
1657 | case elfcpp::R_POWERPC_GOT16_HA: | |
1658 | case elfcpp::R_PPC64_GOT16_DS: | |
1659 | case elfcpp::R_PPC64_GOT16_LO_DS: | |
1660 | if (gsym != NULL) | |
1661 | { | |
1662 | gold_assert(gsym->has_got_offset(GOT_TYPE_STANDARD)); | |
1663 | got_offset = gsym->got_offset(GOT_TYPE_STANDARD); | |
1664 | } | |
1665 | else | |
1666 | { | |
1667 | unsigned int r_sym = elfcpp::elf_r_sym<size>(rela.get_r_info()); | |
1668 | gold_assert(object->local_has_got_offset(r_sym, GOT_TYPE_STANDARD)); | |
1669 | got_offset = object->local_got_offset(r_sym, GOT_TYPE_STANDARD); | |
1670 | } | |
1671 | have_got_offset = true; | |
1672 | break; | |
1673 | ||
1674 | // R_PPC_PLTREL24 is rather special. If non-zero, | |
1675 | // the addend specifies the GOT pointer offset within .got2. | |
1676 | case elfcpp::R_PPC_PLTREL24: | |
1677 | if (addend >= 32768) | |
1678 | { | |
1679 | Output_data_space* got2; | |
1680 | got2 = target->got2_section(); | |
1681 | got2_offset = got2->offset(); | |
1682 | addend += got2_offset; | |
1683 | } | |
1684 | have_got_offset = true; | |
1685 | break; | |
1686 | ||
1687 | default: | |
1688 | break; | |
1689 | } | |
1690 | ||
1691 | switch (r_type) | |
1692 | { | |
1693 | case elfcpp::R_POWERPC_NONE: | |
1694 | case elfcpp::R_POWERPC_GNU_VTINHERIT: | |
1695 | case elfcpp::R_POWERPC_GNU_VTENTRY: | |
1696 | break; | |
1697 | ||
1698 | case elfcpp::R_POWERPC_REL32: | |
1699 | Reloc::rel32(view, object, psymval, addend, address); | |
1700 | break; | |
1701 | ||
1702 | case elfcpp::R_POWERPC_REL24: | |
1703 | Reloc::rel24(view, object, psymval, addend, address); | |
1704 | break; | |
1705 | ||
1706 | case elfcpp::R_POWERPC_REL14: | |
1707 | Reloc::rel14(view, object, psymval, addend, address); | |
1708 | break; | |
1709 | ||
1710 | case elfcpp::R_PPC_PLTREL24: | |
1711 | Reloc::rel24(view, object, psymval, addend, address); | |
1712 | break; | |
1713 | ||
1714 | case elfcpp::R_PPC_LOCAL24PC: | |
1715 | Reloc::rel24(view, object, psymval, addend, address); | |
1716 | break; | |
1717 | ||
1718 | case elfcpp::R_PPC64_ADDR64: | |
1719 | if (!parameters->options().output_is_position_independent()) | |
1720 | Relocate_functions<size, big_endian>::rela64(view, object, | |
1721 | psymval, addend); | |
1722 | break; | |
1723 | ||
1724 | case elfcpp::R_POWERPC_ADDR32: | |
1725 | if (!parameters->options().output_is_position_independent()) | |
1726 | Relocate_functions<size, big_endian>::rela32(view, object, | |
1727 | psymval, addend); | |
1728 | break; | |
1729 | ||
1730 | case elfcpp::R_POWERPC_ADDR16_LO: | |
1731 | Reloc::addr16_lo(view, object, psymval, addend); | |
1732 | break; | |
1733 | ||
1734 | case elfcpp::R_POWERPC_ADDR16_HI: | |
1735 | Reloc::addr16_hi(view, object, psymval, addend); | |
1736 | break; | |
1737 | ||
1738 | case elfcpp::R_POWERPC_ADDR16_HA: | |
1739 | Reloc::addr16_ha(view, object, psymval, addend); | |
1740 | break; | |
1741 | ||
1742 | case elfcpp::R_PPC_REL16_LO: | |
1743 | Reloc::rel16_lo(view, object, psymval, addend, address); | |
1744 | break; | |
1745 | ||
1746 | case elfcpp::R_PPC_REL16_HI: | |
1747 | Reloc::rel16_lo(view, object, psymval, addend, address); | |
1748 | break; | |
1749 | ||
1750 | case elfcpp::R_PPC_REL16_HA: | |
83d22aa8 | 1751 | Reloc::rel16_ha(view, object, psymval, addend, address); |
42cacb20 DE |
1752 | break; |
1753 | ||
1754 | case elfcpp::R_POWERPC_GOT16: | |
1755 | Reloc::addr16(view, got_offset, addend); | |
1756 | break; | |
1757 | ||
1758 | case elfcpp::R_POWERPC_GOT16_LO: | |
1759 | Reloc::addr16_lo(view, got_offset, addend); | |
1760 | break; | |
1761 | ||
1762 | case elfcpp::R_POWERPC_GOT16_HI: | |
1763 | Reloc::addr16_hi(view, got_offset, addend); | |
1764 | break; | |
1765 | ||
1766 | case elfcpp::R_POWERPC_GOT16_HA: | |
1767 | Reloc::addr16_ha(view, got_offset, addend); | |
1768 | break; | |
1769 | ||
1770 | case elfcpp::R_PPC64_TOC16: | |
1771 | Reloc::addr16(view, got_offset, addend); | |
1772 | break; | |
1773 | ||
1774 | case elfcpp::R_PPC64_TOC16_LO: | |
1775 | Reloc::addr16_lo(view, got_offset, addend); | |
1776 | break; | |
1777 | ||
1778 | case elfcpp::R_PPC64_TOC16_HI: | |
1779 | Reloc::addr16_hi(view, got_offset, addend); | |
1780 | break; | |
1781 | ||
1782 | case elfcpp::R_PPC64_TOC16_HA: | |
1783 | Reloc::addr16_ha(view, got_offset, addend); | |
1784 | break; | |
1785 | ||
1786 | case elfcpp::R_PPC64_TOC16_DS: | |
1787 | case elfcpp::R_PPC64_TOC16_LO_DS: | |
1788 | Reloc::addr16_ds(view, got_offset, addend); | |
1789 | break; | |
1790 | ||
1791 | case elfcpp::R_PPC64_TOC: | |
1792 | { | |
1793 | elfcpp::Elf_types<64>::Elf_Addr value; | |
1794 | value = target->toc_section()->address() + toc_base_offset; | |
1795 | Relocate_functions<64, false>::rela64(view, value, addend); | |
1796 | } | |
1797 | break; | |
1798 | ||
1799 | case elfcpp::R_POWERPC_COPY: | |
1800 | case elfcpp::R_POWERPC_GLOB_DAT: | |
1801 | case elfcpp::R_POWERPC_JMP_SLOT: | |
1802 | case elfcpp::R_POWERPC_RELATIVE: | |
1803 | // This is an outstanding tls reloc, which is unexpected when | |
1804 | // linking. | |
1805 | case elfcpp::R_POWERPC_DTPMOD: | |
1806 | gold_error_at_location(relinfo, relnum, rela.get_r_offset(), | |
1807 | _("unexpected reloc %u in object file"), | |
1808 | r_type); | |
1809 | break; | |
1810 | ||
1811 | default: | |
1812 | gold_error_at_location(relinfo, relnum, rela.get_r_offset(), | |
1813 | _("unsupported reloc %u"), | |
1814 | r_type); | |
1815 | break; | |
1816 | } | |
1817 | ||
1818 | return true; | |
1819 | } | |
1820 | ||
1821 | // Perform a TLS relocation. | |
1822 | ||
1823 | template<int size, bool big_endian> | |
1824 | inline void | |
1825 | Target_powerpc<size, big_endian>::Relocate::relocate_tls( | |
1826 | const Relocate_info<size, big_endian>* relinfo, | |
1827 | Target_powerpc<size, big_endian>* target, | |
1828 | size_t relnum, | |
1829 | const elfcpp::Rela<size, big_endian>& rela, | |
1830 | unsigned int r_type, | |
1831 | const Sized_symbol<size>* gsym, | |
1832 | const Symbol_value<size>* psymval, | |
1833 | unsigned char* view, | |
1834 | typename elfcpp::Elf_types<size>::Elf_Addr address, | |
1835 | section_size_type) | |
1836 | { | |
1837 | Output_segment* tls_segment = relinfo->layout->tls_segment(); | |
1838 | typedef Powerpc_relocate_functions<size, big_endian> Reloc; | |
1839 | const Sized_relobj<size, big_endian>* object = relinfo->object; | |
1840 | ||
1841 | const elfcpp::Elf_Xword addend = rela.get_r_addend(); | |
1842 | typename elfcpp::Elf_types<size>::Elf_Addr value = psymval->value(object, 0); | |
1843 | ||
1844 | const bool is_final = | |
1845 | (gsym == NULL | |
1846 | ? !parameters->options().output_is_position_independent() | |
1847 | : gsym->final_value_is_known()); | |
1848 | const tls::Tls_optimization optimized_type | |
1849 | = optimize_tls_reloc(is_final, r_type); | |
1850 | ||
1851 | switch (r_type) | |
1852 | { | |
1853 | // XXX | |
1854 | } | |
1855 | } | |
1856 | ||
1857 | // Relocate section data. | |
1858 | ||
1859 | template<int size, bool big_endian> | |
1860 | void | |
1861 | Target_powerpc<size, big_endian>::relocate_section( | |
1862 | const Relocate_info<size, big_endian>* relinfo, | |
1863 | unsigned int sh_type, | |
1864 | const unsigned char* prelocs, | |
1865 | size_t reloc_count, | |
1866 | Output_section* output_section, | |
1867 | bool needs_special_offset_handling, | |
1868 | unsigned char* view, | |
1869 | typename elfcpp::Elf_types<size>::Elf_Addr address, | |
364c7fa5 ILT |
1870 | section_size_type view_size, |
1871 | const Reloc_symbol_changes* reloc_symbol_changes) | |
42cacb20 DE |
1872 | { |
1873 | typedef Target_powerpc<size, big_endian> Powerpc; | |
1874 | typedef typename Target_powerpc<size, big_endian>::Relocate Powerpc_relocate; | |
1875 | ||
1876 | gold_assert(sh_type == elfcpp::SHT_RELA); | |
1877 | ||
1878 | gold::relocate_section<size, big_endian, Powerpc, elfcpp::SHT_RELA, | |
1879 | Powerpc_relocate>( | |
1880 | relinfo, | |
1881 | this, | |
1882 | prelocs, | |
1883 | reloc_count, | |
1884 | output_section, | |
1885 | needs_special_offset_handling, | |
1886 | view, | |
1887 | address, | |
364c7fa5 ILT |
1888 | view_size, |
1889 | reloc_symbol_changes); | |
42cacb20 DE |
1890 | } |
1891 | ||
1892 | // Return the size of a relocation while scanning during a relocatable | |
1893 | // link. | |
1894 | ||
1895 | template<int size, bool big_endian> | |
1896 | unsigned int | |
1897 | Target_powerpc<size, big_endian>::Relocatable_size_for_reloc::get_size_for_reloc( | |
1898 | unsigned int, | |
1899 | Relobj*) | |
1900 | { | |
1901 | // We are always SHT_RELA, so we should never get here. | |
1902 | gold_unreachable(); | |
1903 | return 0; | |
1904 | } | |
1905 | ||
1906 | // Scan the relocs during a relocatable link. | |
1907 | ||
1908 | template<int size, bool big_endian> | |
1909 | void | |
1910 | Target_powerpc<size, big_endian>::scan_relocatable_relocs( | |
42cacb20 DE |
1911 | Symbol_table* symtab, |
1912 | Layout* layout, | |
1913 | Sized_relobj<size, big_endian>* object, | |
1914 | unsigned int data_shndx, | |
1915 | unsigned int sh_type, | |
1916 | const unsigned char* prelocs, | |
1917 | size_t reloc_count, | |
1918 | Output_section* output_section, | |
1919 | bool needs_special_offset_handling, | |
1920 | size_t local_symbol_count, | |
1921 | const unsigned char* plocal_symbols, | |
1922 | Relocatable_relocs* rr) | |
1923 | { | |
1924 | gold_assert(sh_type == elfcpp::SHT_RELA); | |
1925 | ||
1926 | typedef gold::Default_scan_relocatable_relocs<elfcpp::SHT_RELA, | |
1927 | Relocatable_size_for_reloc> Scan_relocatable_relocs; | |
1928 | ||
1929 | gold::scan_relocatable_relocs<size, big_endian, elfcpp::SHT_RELA, | |
1930 | Scan_relocatable_relocs>( | |
42cacb20 DE |
1931 | symtab, |
1932 | layout, | |
1933 | object, | |
1934 | data_shndx, | |
1935 | prelocs, | |
1936 | reloc_count, | |
1937 | output_section, | |
1938 | needs_special_offset_handling, | |
1939 | local_symbol_count, | |
1940 | plocal_symbols, | |
1941 | rr); | |
1942 | } | |
1943 | ||
1944 | // Relocate a section during a relocatable link. | |
1945 | ||
1946 | template<int size, bool big_endian> | |
1947 | void | |
1948 | Target_powerpc<size, big_endian>::relocate_for_relocatable( | |
1949 | const Relocate_info<size, big_endian>* relinfo, | |
1950 | unsigned int sh_type, | |
1951 | const unsigned char* prelocs, | |
1952 | size_t reloc_count, | |
1953 | Output_section* output_section, | |
1954 | off_t offset_in_output_section, | |
1955 | const Relocatable_relocs* rr, | |
1956 | unsigned char* view, | |
1957 | typename elfcpp::Elf_types<size>::Elf_Addr view_address, | |
1958 | section_size_type view_size, | |
1959 | unsigned char* reloc_view, | |
1960 | section_size_type reloc_view_size) | |
1961 | { | |
1962 | gold_assert(sh_type == elfcpp::SHT_RELA); | |
1963 | ||
1964 | gold::relocate_for_relocatable<size, big_endian, elfcpp::SHT_RELA>( | |
1965 | relinfo, | |
1966 | prelocs, | |
1967 | reloc_count, | |
1968 | output_section, | |
1969 | offset_in_output_section, | |
1970 | rr, | |
1971 | view, | |
1972 | view_address, | |
1973 | view_size, | |
1974 | reloc_view, | |
1975 | reloc_view_size); | |
1976 | } | |
1977 | ||
1978 | // Return the value to use for a dynamic which requires special | |
1979 | // treatment. This is how we support equality comparisons of function | |
1980 | // pointers across shared library boundaries, as described in the | |
1981 | // processor specific ABI supplement. | |
1982 | ||
1983 | template<int size, bool big_endian> | |
1984 | uint64_t | |
1985 | Target_powerpc<size, big_endian>::do_dynsym_value(const Symbol* gsym) const | |
1986 | { | |
1987 | gold_assert(gsym->is_from_dynobj() && gsym->has_plt_offset()); | |
1988 | return this->plt_section()->address() + gsym->plt_offset(); | |
1989 | } | |
1990 | ||
1991 | // The selector for powerpc object files. | |
1992 | ||
1993 | template<int size, bool big_endian> | |
1994 | class Target_selector_powerpc : public Target_selector | |
1995 | { | |
1996 | public: | |
1997 | Target_selector_powerpc() | |
1998 | : Target_selector(elfcpp::EM_NONE, size, big_endian, | |
1999 | (size == 64 ? | |
2000 | (big_endian ? "elf64-powerpc" : "elf64-powerpcle") : | |
2001 | (big_endian ? "elf32-powerpc" : "elf32-powerpcle"))) | |
2002 | { } | |
2003 | ||
2ea97941 | 2004 | Target* do_recognize(int machine, int, int) |
42cacb20 DE |
2005 | { |
2006 | switch (size) | |
2007 | { | |
2008 | case 64: | |
2ea97941 | 2009 | if (machine != elfcpp::EM_PPC64) |
42cacb20 DE |
2010 | return NULL; |
2011 | break; | |
2012 | ||
2013 | case 32: | |
2ea97941 | 2014 | if (machine != elfcpp::EM_PPC) |
42cacb20 DE |
2015 | return NULL; |
2016 | break; | |
2017 | ||
2018 | default: | |
2019 | return NULL; | |
2020 | } | |
2021 | ||
7f055c20 | 2022 | return this->instantiate_target(); |
42cacb20 DE |
2023 | } |
2024 | ||
2025 | Target* do_instantiate_target() | |
7f055c20 | 2026 | { return new Target_powerpc<size, big_endian>(); } |
42cacb20 DE |
2027 | }; |
2028 | ||
2029 | Target_selector_powerpc<32, true> target_selector_ppc32; | |
2030 | Target_selector_powerpc<32, false> target_selector_ppc32le; | |
2031 | Target_selector_powerpc<64, true> target_selector_ppc64; | |
2032 | Target_selector_powerpc<64, false> target_selector_ppc64le; | |
2033 | ||
2034 | } // End anonymous namespace. |