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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 | |
d5b40221 | 95 | do_finalize_sections(Layout*, const Input_objects*); |
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 | |
345 | 0 // large_common_section_flags | |
42cacb20 DE |
346 | }; |
347 | ||
348 | template<> | |
349 | Target::Target_info Target_powerpc<32, false>::powerpc_info = | |
350 | { | |
351 | 32, // size | |
352 | false, // is_big_endian | |
353 | elfcpp::EM_PPC, // machine_code | |
354 | false, // has_make_symbol | |
355 | false, // has_resolve | |
356 | false, // has_code_fill | |
357 | true, // is_default_stack_executable | |
358 | '\0', // wrap_char | |
359 | "/usr/lib/ld.so.1", // dynamic_linker | |
360 | 0x10000000, // default_text_segment_address | |
361 | 64 * 1024, // abi_pagesize (overridable by -z max-page-size) | |
8a5e3e08 ILT |
362 | 4 * 1024, // common_pagesize (overridable by -z common-page-size) |
363 | elfcpp::SHN_UNDEF, // small_common_shndx | |
364 | elfcpp::SHN_UNDEF, // large_common_shndx | |
365 | 0, // small_common_section_flags | |
366 | 0 // large_common_section_flags | |
42cacb20 DE |
367 | }; |
368 | ||
369 | template<> | |
370 | Target::Target_info Target_powerpc<64, true>::powerpc_info = | |
371 | { | |
372 | 64, // size | |
373 | true, // is_big_endian | |
374 | elfcpp::EM_PPC64, // machine_code | |
375 | false, // has_make_symbol | |
376 | false, // has_resolve | |
377 | false, // has_code_fill | |
378 | true, // is_default_stack_executable | |
379 | '\0', // wrap_char | |
380 | "/usr/lib/ld.so.1", // dynamic_linker | |
381 | 0x10000000, // default_text_segment_address | |
382 | 64 * 1024, // abi_pagesize (overridable by -z max-page-size) | |
8a5e3e08 ILT |
383 | 8 * 1024, // common_pagesize (overridable by -z common-page-size) |
384 | elfcpp::SHN_UNDEF, // small_common_shndx | |
385 | elfcpp::SHN_UNDEF, // large_common_shndx | |
386 | 0, // small_common_section_flags | |
387 | 0 // large_common_section_flags | |
42cacb20 DE |
388 | }; |
389 | ||
390 | template<> | |
391 | Target::Target_info Target_powerpc<64, false>::powerpc_info = | |
392 | { | |
393 | 64, // size | |
394 | false, // is_big_endian | |
395 | elfcpp::EM_PPC64, // machine_code | |
396 | false, // has_make_symbol | |
397 | false, // has_resolve | |
398 | false, // has_code_fill | |
399 | true, // is_default_stack_executable | |
400 | '\0', // wrap_char | |
401 | "/usr/lib/ld.so.1", // dynamic_linker | |
402 | 0x10000000, // default_text_segment_address | |
403 | 64 * 1024, // abi_pagesize (overridable by -z max-page-size) | |
8a5e3e08 ILT |
404 | 8 * 1024, // common_pagesize (overridable by -z common-page-size) |
405 | elfcpp::SHN_UNDEF, // small_common_shndx | |
406 | elfcpp::SHN_UNDEF, // large_common_shndx | |
407 | 0, // small_common_section_flags | |
408 | 0 // large_common_section_flags | |
42cacb20 DE |
409 | }; |
410 | ||
411 | template<int size, bool big_endian> | |
412 | class Powerpc_relocate_functions | |
413 | { | |
414 | private: | |
415 | // Do a simple relocation with the addend in the relocation. | |
416 | template<int valsize> | |
417 | static inline void | |
418 | rela(unsigned char* view, | |
419 | unsigned int right_shift, | |
420 | elfcpp::Elf_Xword dst_mask, | |
421 | typename elfcpp::Swap<size, big_endian>::Valtype value, | |
422 | typename elfcpp::Swap<size, big_endian>::Valtype addend) | |
423 | { | |
424 | typedef typename elfcpp::Swap<valsize, big_endian>::Valtype Valtype; | |
425 | Valtype* wv = reinterpret_cast<Valtype*>(view); | |
426 | Valtype val = elfcpp::Swap<valsize, big_endian>::readval(wv); | |
427 | Valtype reloc = ((value + addend) >> right_shift); | |
428 | ||
429 | val &= ~dst_mask; | |
430 | reloc &= dst_mask; | |
431 | ||
432 | elfcpp::Swap<valsize, big_endian>::writeval(wv, val | reloc); | |
433 | } | |
434 | ||
435 | // Do a simple relocation using a symbol value with the addend in | |
436 | // the relocation. | |
437 | template<int valsize> | |
438 | static inline void | |
439 | rela(unsigned char* view, | |
440 | unsigned int right_shift, | |
441 | elfcpp::Elf_Xword dst_mask, | |
442 | const Sized_relobj<size, big_endian>* object, | |
443 | const Symbol_value<size>* psymval, | |
444 | typename elfcpp::Swap<valsize, big_endian>::Valtype addend) | |
445 | { | |
446 | typedef typename elfcpp::Swap<valsize, big_endian>::Valtype Valtype; | |
447 | Valtype* wv = reinterpret_cast<Valtype*>(view); | |
448 | Valtype val = elfcpp::Swap<valsize, big_endian>::readval(wv); | |
449 | Valtype reloc = (psymval->value(object, addend) >> right_shift); | |
450 | ||
451 | val &= ~dst_mask; | |
452 | reloc &= dst_mask; | |
453 | ||
454 | elfcpp::Swap<valsize, big_endian>::writeval(wv, val | reloc); | |
455 | } | |
456 | ||
457 | // Do a simple relocation using a symbol value with the addend in | |
458 | // the relocation, unaligned. | |
459 | template<int valsize> | |
460 | static inline void | |
461 | rela_ua(unsigned char* view, unsigned int right_shift, | |
462 | elfcpp::Elf_Xword dst_mask, | |
463 | const Sized_relobj<size, big_endian>* object, | |
464 | const Symbol_value<size>* psymval, | |
465 | typename elfcpp::Swap<size, big_endian>::Valtype addend) | |
466 | { | |
467 | typedef typename elfcpp::Swap_unaligned<valsize, | |
468 | big_endian>::Valtype Valtype; | |
469 | unsigned char* wv = view; | |
470 | Valtype val = elfcpp::Swap_unaligned<valsize, big_endian>::readval(wv); | |
471 | Valtype reloc = (psymval->value(object, addend) >> right_shift); | |
472 | ||
473 | val &= ~dst_mask; | |
474 | reloc &= dst_mask; | |
475 | ||
476 | elfcpp::Swap_unaligned<valsize, big_endian>::writeval(wv, val | reloc); | |
477 | } | |
478 | ||
479 | // Do a simple PC relative relocation with a Symbol_value with the | |
480 | // addend in the relocation. | |
481 | template<int valsize> | |
482 | static inline void | |
483 | pcrela(unsigned char* view, unsigned int right_shift, | |
484 | elfcpp::Elf_Xword dst_mask, | |
485 | const Sized_relobj<size, big_endian>* object, | |
486 | const Symbol_value<size>* psymval, | |
487 | typename elfcpp::Swap<size, big_endian>::Valtype addend, | |
488 | typename elfcpp::Elf_types<size>::Elf_Addr address) | |
489 | { | |
490 | typedef typename elfcpp::Swap<valsize, big_endian>::Valtype Valtype; | |
491 | Valtype* wv = reinterpret_cast<Valtype*>(view); | |
492 | Valtype val = elfcpp::Swap<valsize, big_endian>::readval(wv); | |
493 | Valtype reloc = ((psymval->value(object, addend) - address) | |
494 | >> right_shift); | |
495 | ||
496 | val &= ~dst_mask; | |
497 | reloc &= dst_mask; | |
498 | ||
499 | elfcpp::Swap<valsize, big_endian>::writeval(wv, val | reloc); | |
500 | } | |
501 | ||
502 | template<int valsize> | |
503 | static inline void | |
504 | pcrela_unaligned(unsigned char* view, | |
505 | const Sized_relobj<size, big_endian>* object, | |
506 | const Symbol_value<size>* psymval, | |
507 | typename elfcpp::Swap<size, big_endian>::Valtype addend, | |
508 | typename elfcpp::Elf_types<size>::Elf_Addr address) | |
509 | { | |
510 | typedef typename elfcpp::Swap_unaligned<valsize, | |
511 | big_endian>::Valtype Valtype; | |
512 | unsigned char* wv = view; | |
513 | Valtype reloc = (psymval->value(object, addend) - address); | |
514 | ||
515 | elfcpp::Swap_unaligned<valsize, big_endian>::writeval(wv, reloc); | |
516 | } | |
517 | ||
518 | typedef Powerpc_relocate_functions<size, big_endian> This; | |
519 | typedef Relocate_functions<size, big_endian> This_reloc; | |
520 | public: | |
521 | // R_POWERPC_REL32: (Symbol + Addend - Address) | |
522 | static inline void | |
523 | rel32(unsigned char* view, | |
524 | const Sized_relobj<size, big_endian>* object, | |
525 | const Symbol_value<size>* psymval, | |
526 | typename elfcpp::Elf_types<size>::Elf_Addr addend, | |
527 | typename elfcpp::Elf_types<size>::Elf_Addr address) | |
528 | { This_reloc::pcrela32(view, object, psymval, addend, address); } | |
529 | ||
530 | // R_POWERPC_REL24: (Symbol + Addend - Address) & 0x3fffffc | |
531 | static inline void | |
532 | rel24(unsigned char* view, | |
533 | const Sized_relobj<size, big_endian>* object, | |
534 | const Symbol_value<size>* psymval, | |
535 | typename elfcpp::Elf_types<size>::Elf_Addr addend, | |
536 | typename elfcpp::Elf_types<size>::Elf_Addr address) | |
537 | { | |
538 | This::template pcrela<32>(view, 0, 0x03fffffc, object, | |
539 | psymval, addend, address); | |
540 | } | |
541 | ||
542 | // R_POWERPC_REL14: (Symbol + Addend - Address) & 0xfffc | |
543 | static inline void | |
544 | rel14(unsigned char* view, | |
545 | const Sized_relobj<size, big_endian>* object, | |
546 | const Symbol_value<size>* psymval, | |
547 | typename elfcpp::Elf_types<size>::Elf_Addr addend, | |
548 | typename elfcpp::Elf_types<size>::Elf_Addr address) | |
549 | { | |
550 | This::template pcrela<32>(view, 0, 0x0000fffc, object, | |
551 | psymval, addend, address); | |
552 | } | |
553 | ||
554 | // R_POWERPC_ADDR16: (Symbol + Addend) & 0xffff | |
555 | static inline void | |
556 | addr16(unsigned char* view, | |
557 | typename elfcpp::Elf_types<size>::Elf_Addr value, | |
558 | typename elfcpp::Elf_types<size>::Elf_Addr addend) | |
559 | { This_reloc::rela16(view, value, addend); } | |
560 | ||
561 | static inline void | |
562 | addr16(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 | { This_reloc::rela16(view, object, psymval, addend); } | |
567 | ||
568 | // R_POWERPC_ADDR16_DS: (Symbol + Addend) & 0xfffc | |
569 | static inline void | |
570 | addr16_ds(unsigned char* view, | |
571 | typename elfcpp::Elf_types<size>::Elf_Addr value, | |
572 | typename elfcpp::Elf_types<size>::Elf_Addr addend) | |
573 | { | |
574 | This::template rela<16>(view, 0, 0xfffc, value, addend); | |
575 | } | |
576 | ||
577 | // R_POWERPC_ADDR16_LO: (Symbol + Addend) & 0xffff | |
578 | static inline void | |
579 | addr16_lo(unsigned char* view, | |
580 | typename elfcpp::Elf_types<size>::Elf_Addr value, | |
581 | typename elfcpp::Elf_types<size>::Elf_Addr addend) | |
582 | { This_reloc::rela16(view, value, addend); } | |
583 | ||
584 | static inline void | |
585 | addr16_lo(unsigned char* view, | |
586 | const Sized_relobj<size, big_endian>* object, | |
587 | const Symbol_value<size>* psymval, | |
588 | typename elfcpp::Elf_types<size>::Elf_Addr addend) | |
589 | { This_reloc::rela16(view, object, psymval, addend); } | |
590 | ||
591 | // R_POWERPC_ADDR16_HI: ((Symbol + Addend) >> 16) & 0xffff | |
592 | static inline void | |
593 | addr16_hi(unsigned char* view, | |
594 | typename elfcpp::Elf_types<size>::Elf_Addr value, | |
595 | typename elfcpp::Elf_types<size>::Elf_Addr addend) | |
596 | { | |
597 | This::template rela<16>(view, 16, 0xffff, value, addend); | |
598 | } | |
599 | ||
600 | static inline void | |
601 | addr16_hi(unsigned char* view, | |
602 | const Sized_relobj<size, big_endian>* object, | |
603 | const Symbol_value<size>* psymval, | |
604 | typename elfcpp::Elf_types<size>::Elf_Addr addend) | |
605 | { | |
606 | This::template rela<16>(view, 16, 0xffff, object, psymval, addend); | |
607 | } | |
608 | ||
609 | // R_POWERPC_ADDR16_HA: Same as R_POWERPC_ADDR16_HI except that if the | |
610 | // final value of the low 16 bits of the | |
611 | // relocation is negative, add one. | |
612 | static inline void | |
613 | addr16_ha(unsigned char* view, | |
614 | typename elfcpp::Elf_types<size>::Elf_Addr value, | |
615 | typename elfcpp::Elf_types<size>::Elf_Addr addend) | |
616 | { | |
42cacb20 DE |
617 | typename elfcpp::Elf_types<size>::Elf_Addr reloc; |
618 | ||
619 | reloc = value + addend; | |
620 | ||
621 | if (reloc & 0x8000) | |
622 | reloc += 0x10000; | |
623 | reloc >>= 16; | |
624 | ||
e6fde208 | 625 | elfcpp::Swap<16, big_endian>::writeval(view, reloc); |
42cacb20 DE |
626 | } |
627 | ||
628 | static inline void | |
629 | addr16_ha(unsigned char* view, | |
630 | const Sized_relobj<size, big_endian>* object, | |
631 | const Symbol_value<size>* psymval, | |
632 | typename elfcpp::Elf_types<size>::Elf_Addr addend) | |
633 | { | |
42cacb20 DE |
634 | typename elfcpp::Elf_types<size>::Elf_Addr reloc; |
635 | ||
636 | reloc = psymval->value(object, addend); | |
637 | ||
638 | if (reloc & 0x8000) | |
639 | reloc += 0x10000; | |
640 | reloc >>= 16; | |
641 | ||
e6fde208 | 642 | elfcpp::Swap<16, big_endian>::writeval(view, reloc); |
42cacb20 DE |
643 | } |
644 | ||
645 | // R_PPC_REL16: (Symbol + Addend - Address) & 0xffff | |
646 | static inline void | |
647 | rel16(unsigned char* view, | |
648 | const Sized_relobj<size, big_endian>* object, | |
649 | const Symbol_value<size>* psymval, | |
650 | typename elfcpp::Elf_types<size>::Elf_Addr addend, | |
651 | typename elfcpp::Elf_types<size>::Elf_Addr address) | |
652 | { This_reloc::pcrela16(view, object, psymval, addend, address); } | |
653 | ||
654 | // R_PPC_REL16_LO: (Symbol + Addend - Address) & 0xffff | |
655 | static inline void | |
656 | rel16_lo(unsigned char* view, | |
657 | const Sized_relobj<size, big_endian>* object, | |
658 | const Symbol_value<size>* psymval, | |
659 | typename elfcpp::Elf_types<size>::Elf_Addr addend, | |
660 | typename elfcpp::Elf_types<size>::Elf_Addr address) | |
661 | { This_reloc::pcrela16(view, object, psymval, addend, address); } | |
662 | ||
663 | // R_PPC_REL16_HI: ((Symbol + Addend - Address) >> 16) & 0xffff | |
664 | static inline void | |
665 | rel16_hi(unsigned char* view, | |
666 | const Sized_relobj<size, big_endian>* object, | |
667 | const Symbol_value<size>* psymval, | |
668 | typename elfcpp::Elf_types<size>::Elf_Addr addend, | |
669 | typename elfcpp::Elf_types<size>::Elf_Addr address) | |
670 | { | |
671 | This::template pcrela<16>(view, 16, 0xffff, object, | |
672 | psymval, addend, address); | |
673 | } | |
674 | ||
675 | // R_PPC_REL16_HA: Same as R_PPC_REL16_HI except that if the | |
676 | // final value of the low 16 bits of the | |
677 | // relocation is negative, add one. | |
678 | static inline void | |
679 | rel16_ha(unsigned char* view, | |
680 | const Sized_relobj<size, big_endian>* object, | |
681 | const Symbol_value<size>* psymval, | |
682 | typename elfcpp::Elf_types<size>::Elf_Addr addend, | |
683 | typename elfcpp::Elf_types<size>::Elf_Addr address) | |
684 | { | |
42cacb20 DE |
685 | typename elfcpp::Elf_types<size>::Elf_Addr reloc; |
686 | ||
687 | reloc = (psymval->value(object, addend) - address); | |
688 | if (reloc & 0x8000) | |
689 | reloc += 0x10000; | |
690 | reloc >>= 16; | |
691 | ||
83d22aa8 | 692 | elfcpp::Swap<16, big_endian>::writeval(view, reloc); |
42cacb20 DE |
693 | } |
694 | }; | |
695 | ||
696 | // Get the GOT section, creating it if necessary. | |
697 | ||
698 | template<int size, bool big_endian> | |
699 | Output_data_got<size, big_endian>* | |
700 | Target_powerpc<size, big_endian>::got_section(Symbol_table* symtab, | |
701 | Layout* layout) | |
702 | { | |
703 | if (this->got_ == NULL) | |
704 | { | |
705 | gold_assert(symtab != NULL && layout != NULL); | |
706 | ||
707 | this->got_ = new Output_data_got<size, big_endian>(); | |
708 | ||
709 | layout->add_output_section_data(".got", elfcpp::SHT_PROGBITS, | |
710 | elfcpp::SHF_ALLOC | elfcpp::SHF_WRITE, | |
f5c870d2 | 711 | this->got_, false); |
42cacb20 DE |
712 | |
713 | // Create the GOT2 or TOC in the .got section. | |
714 | if (size == 32) | |
715 | { | |
716 | this->got2_ = new Output_data_space(4, "** GOT2"); | |
717 | layout->add_output_section_data(".got2", elfcpp::SHT_PROGBITS, | |
718 | elfcpp::SHF_ALLOC | |
719 | | elfcpp::SHF_WRITE, | |
f5c870d2 | 720 | this->got2_, false); |
42cacb20 DE |
721 | } |
722 | else | |
723 | { | |
724 | this->toc_ = new Output_data_space(8, "** TOC"); | |
725 | layout->add_output_section_data(".toc", elfcpp::SHT_PROGBITS, | |
726 | elfcpp::SHF_ALLOC | |
727 | | elfcpp::SHF_WRITE, | |
f5c870d2 | 728 | this->toc_, false); |
42cacb20 DE |
729 | } |
730 | ||
731 | // Define _GLOBAL_OFFSET_TABLE_ at the start of the .got section. | |
732 | symtab->define_in_output_data("_GLOBAL_OFFSET_TABLE_", NULL, | |
733 | this->got_, | |
734 | 0, 0, elfcpp::STT_OBJECT, | |
735 | elfcpp::STB_LOCAL, | |
736 | elfcpp::STV_HIDDEN, 0, | |
737 | false, false); | |
738 | } | |
739 | ||
740 | return this->got_; | |
741 | } | |
742 | ||
743 | // Get the dynamic reloc section, creating it if necessary. | |
744 | ||
745 | template<int size, bool big_endian> | |
746 | typename Target_powerpc<size, big_endian>::Reloc_section* | |
747 | Target_powerpc<size, big_endian>::rela_dyn_section(Layout* layout) | |
748 | { | |
749 | if (this->rela_dyn_ == NULL) | |
750 | { | |
751 | gold_assert(layout != NULL); | |
752 | this->rela_dyn_ = new Reloc_section(parameters->options().combreloc()); | |
753 | layout->add_output_section_data(".rela.dyn", elfcpp::SHT_RELA, | |
f5c870d2 | 754 | elfcpp::SHF_ALLOC, this->rela_dyn_, true); |
42cacb20 DE |
755 | } |
756 | return this->rela_dyn_; | |
757 | } | |
758 | ||
759 | // A class to handle the PLT data. | |
760 | ||
761 | template<int size, bool big_endian> | |
762 | class Output_data_plt_powerpc : public Output_section_data | |
763 | { | |
764 | public: | |
765 | typedef Output_data_reloc<elfcpp::SHT_RELA, true, | |
766 | size, big_endian> Reloc_section; | |
767 | ||
768 | Output_data_plt_powerpc(Layout*); | |
769 | ||
770 | // Add an entry to the PLT. | |
771 | void add_entry(Symbol* gsym); | |
772 | ||
773 | // Return the .rela.plt section data. | |
774 | const Reloc_section* rel_plt() const | |
775 | { | |
776 | return this->rel_; | |
777 | } | |
778 | ||
779 | protected: | |
780 | void do_adjust_output_section(Output_section* os); | |
781 | ||
782 | private: | |
783 | // The size of an entry in the PLT. | |
784 | static const int base_plt_entry_size = (size == 32 ? 16 : 24); | |
785 | ||
786 | // Set the final size. | |
787 | void | |
788 | set_final_data_size() | |
789 | { | |
790 | unsigned int full_count = this->count_ + 4; | |
791 | ||
792 | this->set_data_size(full_count * base_plt_entry_size); | |
793 | } | |
794 | ||
795 | // Write out the PLT data. | |
796 | void | |
797 | do_write(Output_file*); | |
798 | ||
799 | // The reloc section. | |
800 | Reloc_section* rel_; | |
801 | // The number of PLT entries. | |
802 | unsigned int count_; | |
803 | }; | |
804 | ||
805 | // Create the PLT section. The ordinary .got section is an argument, | |
806 | // since we need to refer to the start. | |
807 | ||
808 | template<int size, bool big_endian> | |
809 | Output_data_plt_powerpc<size, big_endian>::Output_data_plt_powerpc(Layout* layout) | |
810 | : Output_section_data(size == 32 ? 4 : 8), count_(0) | |
811 | { | |
812 | this->rel_ = new Reloc_section(false); | |
813 | layout->add_output_section_data(".rela.plt", elfcpp::SHT_RELA, | |
f5c870d2 | 814 | elfcpp::SHF_ALLOC, this->rel_, true); |
42cacb20 DE |
815 | } |
816 | ||
817 | template<int size, bool big_endian> | |
818 | void | |
819 | Output_data_plt_powerpc<size, big_endian>::do_adjust_output_section(Output_section* os) | |
820 | { | |
821 | os->set_entsize(0); | |
822 | } | |
823 | ||
824 | // Add an entry to the PLT. | |
825 | ||
826 | template<int size, bool big_endian> | |
827 | void | |
828 | Output_data_plt_powerpc<size, big_endian>::add_entry(Symbol* gsym) | |
829 | { | |
830 | gold_assert(!gsym->has_plt_offset()); | |
831 | unsigned int index = this->count_+ + 4; | |
832 | section_offset_type plt_offset; | |
833 | ||
834 | if (index < 8192) | |
835 | plt_offset = index * base_plt_entry_size; | |
836 | else | |
837 | gold_unreachable(); | |
838 | ||
839 | gsym->set_plt_offset(plt_offset); | |
840 | ||
841 | ++this->count_; | |
842 | ||
843 | gsym->set_needs_dynsym_entry(); | |
844 | this->rel_->add_global(gsym, elfcpp::R_POWERPC_JMP_SLOT, this, | |
845 | plt_offset, 0); | |
846 | } | |
847 | ||
848 | static const unsigned int addis_11_11 = 0x3d6b0000; | |
849 | static const unsigned int addis_11_30 = 0x3d7e0000; | |
850 | static const unsigned int addis_12_12 = 0x3d8c0000; | |
851 | static const unsigned int addi_11_11 = 0x396b0000; | |
852 | static const unsigned int add_0_11_11 = 0x7c0b5a14; | |
853 | static const unsigned int add_11_0_11 = 0x7d605a14; | |
854 | static const unsigned int b = 0x48000000; | |
855 | static const unsigned int bcl_20_31 = 0x429f0005; | |
856 | static const unsigned int bctr = 0x4e800420; | |
857 | static const unsigned int lis_11 = 0x3d600000; | |
858 | static const unsigned int lis_12 = 0x3d800000; | |
859 | static const unsigned int lwzu_0_12 = 0x840c0000; | |
860 | static const unsigned int lwz_0_12 = 0x800c0000; | |
861 | static const unsigned int lwz_11_11 = 0x816b0000; | |
862 | static const unsigned int lwz_11_30 = 0x817e0000; | |
863 | static const unsigned int lwz_12_12 = 0x818c0000; | |
864 | static const unsigned int mflr_0 = 0x7c0802a6; | |
865 | static const unsigned int mflr_12 = 0x7d8802a6; | |
866 | static const unsigned int mtctr_0 = 0x7c0903a6; | |
867 | static const unsigned int mtctr_11 = 0x7d6903a6; | |
868 | static const unsigned int mtlr_0 = 0x7c0803a6; | |
869 | static const unsigned int nop = 0x60000000; | |
870 | static const unsigned int sub_11_11_12 = 0x7d6c5850; | |
871 | ||
872 | static const unsigned int addis_r12_r2 = 0x3d820000; /* addis %r12,%r2,xxx@ha */ | |
873 | static const unsigned int std_r2_40r1 = 0xf8410028; /* std %r2,40(%r1) */ | |
874 | static const unsigned int ld_r11_0r12 = 0xe96c0000; /* ld %r11,xxx+0@l(%r12) */ | |
875 | static const unsigned int ld_r2_0r12 = 0xe84c0000; /* ld %r2,xxx+8@l(%r12) */ | |
876 | /* ld %r11,xxx+16@l(%r12) */ | |
877 | ||
878 | ||
879 | // Write out the PLT. | |
880 | ||
881 | template<int size, bool big_endian> | |
882 | void | |
883 | Output_data_plt_powerpc<size, big_endian>::do_write(Output_file* of) | |
884 | { | |
885 | const off_t offset = this->offset(); | |
886 | const section_size_type oview_size = | |
887 | convert_to_section_size_type(this->data_size()); | |
888 | unsigned char* const oview = of->get_output_view(offset, oview_size); | |
889 | unsigned char* pov = oview; | |
890 | ||
891 | memset(pov, 0, base_plt_entry_size * 4); | |
892 | pov += base_plt_entry_size * 4; | |
893 | ||
894 | unsigned int plt_offset = base_plt_entry_size * 4; | |
895 | const unsigned int count = this->count_; | |
896 | ||
897 | if (size == 64) | |
898 | { | |
899 | for (unsigned int i = 0; i < count; i++) | |
900 | { | |
901 | } | |
902 | } | |
903 | else | |
904 | { | |
905 | for (unsigned int i = 0; i < count; i++) | |
906 | { | |
907 | elfcpp::Swap<32, true>::writeval(pov + 0x00, | |
908 | lwz_11_30 + plt_offset); | |
909 | elfcpp::Swap<32, true>::writeval(pov + 0x04, mtctr_11); | |
910 | elfcpp::Swap<32, true>::writeval(pov + 0x08, bctr); | |
ce3ac18a | 911 | elfcpp::Swap<32, true>::writeval(pov + 0x0c, nop); |
42cacb20 DE |
912 | pov += base_plt_entry_size; |
913 | plt_offset += base_plt_entry_size; | |
914 | } | |
915 | } | |
916 | ||
917 | gold_assert(static_cast<section_size_type>(pov - oview) == oview_size); | |
918 | ||
919 | of->write_output_view(offset, oview_size, oview); | |
920 | } | |
921 | ||
922 | // Create a PLT entry for a global symbol. | |
923 | ||
924 | template<int size, bool big_endian> | |
925 | void | |
926 | Target_powerpc<size, big_endian>::make_plt_entry(Symbol_table* symtab, | |
927 | Layout* layout, | |
928 | Symbol* gsym) | |
929 | { | |
930 | if (gsym->has_plt_offset()) | |
931 | return; | |
932 | ||
933 | if (this->plt_ == NULL) | |
934 | { | |
935 | // Create the GOT section first. | |
936 | this->got_section(symtab, layout); | |
937 | ||
938 | this->plt_ = new Output_data_plt_powerpc<size, big_endian>(layout); | |
939 | layout->add_output_section_data(".plt", elfcpp::SHT_PROGBITS, | |
940 | (elfcpp::SHF_ALLOC | |
941 | | elfcpp::SHF_EXECINSTR | |
942 | | elfcpp::SHF_WRITE), | |
f5c870d2 | 943 | this->plt_, false); |
42cacb20 DE |
944 | |
945 | // Define _PROCEDURE_LINKAGE_TABLE_ at the start of the .plt section. | |
946 | symtab->define_in_output_data("_PROCEDURE_LINKAGE_TABLE_", NULL, | |
947 | this->plt_, | |
948 | 0, 0, elfcpp::STT_OBJECT, | |
949 | elfcpp::STB_LOCAL, | |
950 | elfcpp::STV_HIDDEN, 0, | |
951 | false, false); | |
952 | } | |
953 | ||
954 | this->plt_->add_entry(gsym); | |
955 | } | |
956 | ||
957 | // Create a GOT entry for the TLS module index. | |
958 | ||
959 | template<int size, bool big_endian> | |
960 | unsigned int | |
961 | Target_powerpc<size, big_endian>::got_mod_index_entry(Symbol_table* symtab, | |
962 | Layout* layout, | |
963 | Sized_relobj<size, big_endian>* object) | |
964 | { | |
965 | if (this->got_mod_index_offset_ == -1U) | |
966 | { | |
967 | gold_assert(symtab != NULL && layout != NULL && object != NULL); | |
968 | Reloc_section* rela_dyn = this->rela_dyn_section(layout); | |
969 | Output_data_got<size, big_endian>* got; | |
970 | unsigned int got_offset; | |
971 | ||
972 | got = this->got_section(symtab, layout); | |
973 | got_offset = got->add_constant(0); | |
974 | rela_dyn->add_local(object, 0, elfcpp::R_POWERPC_DTPMOD, got, | |
975 | got_offset, 0); | |
976 | got->add_constant(0); | |
977 | this->got_mod_index_offset_ = got_offset; | |
978 | } | |
979 | return this->got_mod_index_offset_; | |
980 | } | |
981 | ||
982 | // Optimize the TLS relocation type based on what we know about the | |
983 | // symbol. IS_FINAL is true if the final address of this symbol is | |
984 | // known at link time. | |
985 | ||
986 | static tls::Tls_optimization | |
987 | optimize_tls_reloc(bool /* is_final */, int r_type) | |
988 | { | |
989 | // If we are generating a shared library, then we can't do anything | |
990 | // in the linker. | |
991 | if (parameters->options().shared()) | |
992 | return tls::TLSOPT_NONE; | |
993 | switch (r_type) | |
994 | { | |
995 | // XXX | |
996 | default: | |
997 | gold_unreachable(); | |
998 | } | |
999 | } | |
1000 | ||
1001 | // Report an unsupported relocation against a local symbol. | |
1002 | ||
1003 | template<int size, bool big_endian> | |
1004 | void | |
1005 | Target_powerpc<size, big_endian>::Scan::unsupported_reloc_local( | |
1006 | Sized_relobj<size, big_endian>* object, | |
1007 | unsigned int r_type) | |
1008 | { | |
1009 | gold_error(_("%s: unsupported reloc %u against local symbol"), | |
1010 | object->name().c_str(), r_type); | |
1011 | } | |
1012 | ||
1013 | // We are about to emit a dynamic relocation of type R_TYPE. If the | |
1014 | // dynamic linker does not support it, issue an error. | |
1015 | ||
1016 | template<int size, bool big_endian> | |
1017 | void | |
1018 | Target_powerpc<size, big_endian>::Scan::check_non_pic(Relobj* object, | |
1019 | unsigned int r_type) | |
1020 | { | |
1021 | gold_assert(r_type != elfcpp::R_POWERPC_NONE); | |
1022 | ||
1023 | // These are the relocation types supported by glibc for both 32-bit | |
1024 | // and 64-bit powerpc. | |
1025 | switch (r_type) | |
1026 | { | |
1027 | case elfcpp::R_POWERPC_RELATIVE: | |
1028 | case elfcpp::R_POWERPC_GLOB_DAT: | |
1029 | case elfcpp::R_POWERPC_DTPMOD: | |
1030 | case elfcpp::R_POWERPC_DTPREL: | |
1031 | case elfcpp::R_POWERPC_TPREL: | |
1032 | case elfcpp::R_POWERPC_JMP_SLOT: | |
1033 | case elfcpp::R_POWERPC_COPY: | |
1034 | case elfcpp::R_POWERPC_ADDR32: | |
1035 | case elfcpp::R_POWERPC_ADDR24: | |
1036 | case elfcpp::R_POWERPC_REL24: | |
1037 | return; | |
1038 | ||
1039 | default: | |
1040 | break; | |
1041 | } | |
1042 | ||
1043 | if (size == 64) | |
1044 | { | |
1045 | switch (r_type) | |
1046 | { | |
1047 | // These are the relocation types supported only on 64-bit. | |
1048 | case elfcpp::R_PPC64_ADDR64: | |
1049 | case elfcpp::R_PPC64_TPREL16_LO_DS: | |
1050 | case elfcpp::R_PPC64_TPREL16_DS: | |
1051 | case elfcpp::R_POWERPC_TPREL16: | |
1052 | case elfcpp::R_POWERPC_TPREL16_LO: | |
1053 | case elfcpp::R_POWERPC_TPREL16_HI: | |
1054 | case elfcpp::R_POWERPC_TPREL16_HA: | |
1055 | case elfcpp::R_PPC64_TPREL16_HIGHER: | |
1056 | case elfcpp::R_PPC64_TPREL16_HIGHEST: | |
1057 | case elfcpp::R_PPC64_TPREL16_HIGHERA: | |
1058 | case elfcpp::R_PPC64_TPREL16_HIGHESTA: | |
1059 | case elfcpp::R_PPC64_ADDR16_LO_DS: | |
1060 | case elfcpp::R_POWERPC_ADDR16_LO: | |
1061 | case elfcpp::R_POWERPC_ADDR16_HI: | |
1062 | case elfcpp::R_POWERPC_ADDR16_HA: | |
1063 | case elfcpp::R_POWERPC_ADDR30: | |
1064 | case elfcpp::R_PPC64_UADDR64: | |
1065 | case elfcpp::R_POWERPC_UADDR32: | |
1066 | case elfcpp::R_POWERPC_ADDR16: | |
1067 | case elfcpp::R_POWERPC_UADDR16: | |
1068 | case elfcpp::R_PPC64_ADDR16_DS: | |
1069 | case elfcpp::R_PPC64_ADDR16_HIGHER: | |
1070 | case elfcpp::R_PPC64_ADDR16_HIGHEST: | |
1071 | case elfcpp::R_PPC64_ADDR16_HIGHERA: | |
1072 | case elfcpp::R_PPC64_ADDR16_HIGHESTA: | |
1073 | case elfcpp::R_POWERPC_ADDR14_BRTAKEN: | |
1074 | case elfcpp::R_POWERPC_ADDR14_BRNTAKEN: | |
1075 | case elfcpp::R_POWERPC_REL32: | |
1076 | case elfcpp::R_PPC64_REL64: | |
1077 | return; | |
1078 | ||
1079 | default: | |
1080 | break; | |
1081 | } | |
1082 | } | |
1083 | else | |
1084 | { | |
1085 | switch (r_type) | |
1086 | { | |
1087 | // These are the relocation types supported only on 32-bit. | |
1088 | ||
1089 | default: | |
1090 | break; | |
1091 | } | |
1092 | } | |
1093 | ||
1094 | // This prevents us from issuing more than one error per reloc | |
1095 | // section. But we can still wind up issuing more than one | |
1096 | // error per object file. | |
1097 | if (this->issued_non_pic_error_) | |
1098 | return; | |
33aea2fd | 1099 | gold_assert(parameters->options().output_is_position_independent()); |
42cacb20 DE |
1100 | object->error(_("requires unsupported dynamic reloc; " |
1101 | "recompile with -fPIC")); | |
1102 | this->issued_non_pic_error_ = true; | |
1103 | return; | |
1104 | } | |
1105 | ||
1106 | // Scan a relocation for a local symbol. | |
1107 | ||
1108 | template<int size, bool big_endian> | |
1109 | inline void | |
1110 | Target_powerpc<size, big_endian>::Scan::local( | |
42cacb20 DE |
1111 | Symbol_table* symtab, |
1112 | Layout* layout, | |
1113 | Target_powerpc<size, big_endian>* target, | |
1114 | Sized_relobj<size, big_endian>* object, | |
1115 | unsigned int data_shndx, | |
1116 | Output_section* output_section, | |
1117 | const elfcpp::Rela<size, big_endian>& reloc, | |
1118 | unsigned int r_type, | |
1119 | const elfcpp::Sym<size, big_endian>& lsym) | |
1120 | { | |
1121 | switch (r_type) | |
1122 | { | |
1123 | case elfcpp::R_POWERPC_NONE: | |
1124 | case elfcpp::R_POWERPC_GNU_VTINHERIT: | |
1125 | case elfcpp::R_POWERPC_GNU_VTENTRY: | |
1126 | break; | |
1127 | ||
1128 | case elfcpp::R_PPC64_ADDR64: | |
1129 | case elfcpp::R_POWERPC_ADDR32: | |
1130 | case elfcpp::R_POWERPC_ADDR16_HA: | |
1131 | case elfcpp::R_POWERPC_ADDR16_LO: | |
1132 | // If building a shared library (or a position-independent | |
1133 | // executable), we need to create a dynamic relocation for | |
1134 | // this location. | |
1135 | if (parameters->options().output_is_position_independent()) | |
1136 | { | |
1137 | Reloc_section* rela_dyn = target->rela_dyn_section(layout); | |
1138 | ||
1139 | check_non_pic(object, r_type); | |
1140 | if (lsym.get_st_type() != elfcpp::STT_SECTION) | |
1141 | { | |
1142 | unsigned int r_sym = elfcpp::elf_r_sym<size>(reloc.get_r_info()); | |
1143 | rela_dyn->add_local(object, r_sym, r_type, output_section, | |
1144 | data_shndx, reloc.get_r_offset(), | |
1145 | reloc.get_r_addend()); | |
1146 | } | |
1147 | else | |
1148 | { | |
1149 | unsigned int r_sym = elfcpp::elf_r_sym<size>(reloc.get_r_info()); | |
1150 | gold_assert(lsym.get_st_value() == 0); | |
1151 | rela_dyn->add_local_relative(object, r_sym, r_type, | |
1152 | output_section, data_shndx, | |
1153 | reloc.get_r_offset(), | |
1154 | reloc.get_r_addend()); | |
1155 | } | |
1156 | } | |
1157 | break; | |
1158 | ||
1159 | case elfcpp::R_POWERPC_REL24: | |
1160 | case elfcpp::R_PPC_LOCAL24PC: | |
1161 | case elfcpp::R_POWERPC_REL32: | |
1162 | case elfcpp::R_PPC_REL16_LO: | |
1163 | case elfcpp::R_PPC_REL16_HA: | |
1164 | break; | |
1165 | ||
1166 | case elfcpp::R_POWERPC_GOT16: | |
1167 | case elfcpp::R_POWERPC_GOT16_LO: | |
1168 | case elfcpp::R_POWERPC_GOT16_HI: | |
1169 | case elfcpp::R_POWERPC_GOT16_HA: | |
1170 | case elfcpp::R_PPC64_TOC16: | |
1171 | case elfcpp::R_PPC64_TOC16_LO: | |
1172 | case elfcpp::R_PPC64_TOC16_HI: | |
1173 | case elfcpp::R_PPC64_TOC16_HA: | |
1174 | case elfcpp::R_PPC64_TOC16_DS: | |
1175 | case elfcpp::R_PPC64_TOC16_LO_DS: | |
1176 | { | |
1177 | // The symbol requires a GOT entry. | |
1178 | Output_data_got<size, big_endian>* got; | |
1179 | unsigned int r_sym; | |
1180 | ||
1181 | got = target->got_section(symtab, layout); | |
1182 | r_sym = elfcpp::elf_r_sym<size>(reloc.get_r_info()); | |
1183 | ||
1184 | // If we are generating a shared object, we need to add a | |
1185 | // dynamic relocation for this symbol's GOT entry. | |
1186 | if (parameters->options().output_is_position_independent()) | |
1187 | { | |
1188 | if (!object->local_has_got_offset(r_sym, GOT_TYPE_STANDARD)) | |
1189 | { | |
1190 | Reloc_section* rela_dyn = target->rela_dyn_section(layout); | |
1191 | unsigned int off; | |
1192 | ||
1193 | off = got->add_constant(0); | |
1194 | object->set_local_got_offset(r_sym, GOT_TYPE_STANDARD, off); | |
1195 | rela_dyn->add_local_relative(object, r_sym, | |
1196 | elfcpp::R_POWERPC_RELATIVE, | |
1197 | got, off, 0); | |
1198 | } | |
1199 | } | |
1200 | else | |
1201 | got->add_local(object, r_sym, GOT_TYPE_STANDARD); | |
1202 | } | |
1203 | break; | |
1204 | ||
1205 | case elfcpp::R_PPC64_TOC: | |
1206 | // We need a GOT section. | |
1207 | target->got_section(symtab, layout); | |
1208 | break; | |
1209 | ||
1210 | // These are relocations which should only be seen by the | |
1211 | // dynamic linker, and should never be seen here. | |
1212 | case elfcpp::R_POWERPC_COPY: | |
1213 | case elfcpp::R_POWERPC_GLOB_DAT: | |
1214 | case elfcpp::R_POWERPC_JMP_SLOT: | |
1215 | case elfcpp::R_POWERPC_RELATIVE: | |
1216 | case elfcpp::R_POWERPC_DTPMOD: | |
1217 | gold_error(_("%s: unexpected reloc %u in object file"), | |
1218 | object->name().c_str(), r_type); | |
1219 | break; | |
1220 | ||
1221 | default: | |
1222 | unsupported_reloc_local(object, r_type); | |
1223 | break; | |
1224 | } | |
1225 | } | |
1226 | ||
1227 | // Report an unsupported relocation against a global symbol. | |
1228 | ||
1229 | template<int size, bool big_endian> | |
1230 | void | |
1231 | Target_powerpc<size, big_endian>::Scan::unsupported_reloc_global( | |
1232 | Sized_relobj<size, big_endian>* object, | |
1233 | unsigned int r_type, | |
1234 | Symbol* gsym) | |
1235 | { | |
1236 | gold_error(_("%s: unsupported reloc %u against global symbol %s"), | |
1237 | object->name().c_str(), r_type, gsym->demangled_name().c_str()); | |
1238 | } | |
1239 | ||
1240 | // Scan a relocation for a global symbol. | |
1241 | ||
1242 | template<int size, bool big_endian> | |
1243 | inline void | |
1244 | Target_powerpc<size, big_endian>::Scan::global( | |
42cacb20 DE |
1245 | Symbol_table* symtab, |
1246 | Layout* layout, | |
1247 | Target_powerpc<size, big_endian>* target, | |
1248 | Sized_relobj<size, big_endian>* object, | |
1249 | unsigned int data_shndx, | |
1250 | Output_section* output_section, | |
1251 | const elfcpp::Rela<size, big_endian>& reloc, | |
1252 | unsigned int r_type, | |
1253 | Symbol* gsym) | |
1254 | { | |
1255 | switch (r_type) | |
1256 | { | |
1257 | case elfcpp::R_POWERPC_NONE: | |
1258 | case elfcpp::R_POWERPC_GNU_VTINHERIT: | |
1259 | case elfcpp::R_POWERPC_GNU_VTENTRY: | |
1260 | break; | |
1261 | ||
1262 | case elfcpp::R_PPC_PLTREL24: | |
1263 | // If the symbol is fully resolved, this is just a PC32 reloc. | |
1264 | // Otherwise we need a PLT entry. | |
1265 | if (gsym->final_value_is_known()) | |
1266 | break; | |
1267 | // If building a shared library, we can also skip the PLT entry | |
1268 | // if the symbol is defined in the output file and is protected | |
1269 | // or hidden. | |
1270 | if (gsym->is_defined() | |
1271 | && !gsym->is_from_dynobj() | |
1272 | && !gsym->is_preemptible()) | |
1273 | break; | |
1274 | target->make_plt_entry(symtab, layout, gsym); | |
1275 | break; | |
1276 | ||
1277 | case elfcpp::R_POWERPC_ADDR16: | |
1278 | case elfcpp::R_POWERPC_ADDR16_LO: | |
1279 | case elfcpp::R_POWERPC_ADDR16_HI: | |
1280 | case elfcpp::R_POWERPC_ADDR16_HA: | |
1281 | case elfcpp::R_POWERPC_ADDR32: | |
1282 | case elfcpp::R_PPC64_ADDR64: | |
1283 | { | |
1284 | // Make a PLT entry if necessary. | |
1285 | if (gsym->needs_plt_entry()) | |
1286 | { | |
1287 | target->make_plt_entry(symtab, layout, gsym); | |
1288 | // Since this is not a PC-relative relocation, we may be | |
1289 | // taking the address of a function. In that case we need to | |
1290 | // set the entry in the dynamic symbol table to the address of | |
1291 | // the PLT entry. | |
1292 | if (gsym->is_from_dynobj() && !parameters->options().shared()) | |
1293 | gsym->set_needs_dynsym_value(); | |
1294 | } | |
1295 | // Make a dynamic relocation if necessary. | |
1296 | if (gsym->needs_dynamic_reloc(Symbol::ABSOLUTE_REF)) | |
1297 | { | |
966d4097 | 1298 | if (gsym->may_need_copy_reloc()) |
42cacb20 DE |
1299 | { |
1300 | target->copy_reloc(symtab, layout, object, | |
1301 | data_shndx, output_section, gsym, reloc); | |
1302 | } | |
1303 | else if ((r_type == elfcpp::R_POWERPC_ADDR32 | |
1304 | || r_type == elfcpp::R_PPC64_ADDR64) | |
1305 | && gsym->can_use_relative_reloc(false)) | |
1306 | { | |
1307 | Reloc_section* rela_dyn = target->rela_dyn_section(layout); | |
1308 | rela_dyn->add_global_relative(gsym, elfcpp::R_POWERPC_RELATIVE, | |
1309 | output_section, object, | |
1310 | data_shndx, reloc.get_r_offset(), | |
1311 | reloc.get_r_addend()); | |
1312 | } | |
1313 | else | |
1314 | { | |
1315 | Reloc_section* rela_dyn = target->rela_dyn_section(layout); | |
1316 | ||
1317 | check_non_pic(object, r_type); | |
1318 | if (gsym->is_from_dynobj() | |
1319 | || gsym->is_undefined() | |
1320 | || gsym->is_preemptible()) | |
1321 | rela_dyn->add_global(gsym, r_type, output_section, | |
1322 | object, data_shndx, | |
1323 | reloc.get_r_offset(), | |
1324 | reloc.get_r_addend()); | |
1325 | else | |
1326 | rela_dyn->add_global_relative(gsym, r_type, | |
1327 | output_section, object, | |
1328 | data_shndx, | |
1329 | reloc.get_r_offset(), | |
1330 | reloc.get_r_addend()); | |
1331 | } | |
1332 | } | |
1333 | } | |
1334 | break; | |
1335 | ||
1336 | case elfcpp::R_POWERPC_REL24: | |
1337 | case elfcpp::R_PPC_LOCAL24PC: | |
1338 | case elfcpp::R_PPC_REL16: | |
1339 | case elfcpp::R_PPC_REL16_LO: | |
1340 | case elfcpp::R_PPC_REL16_HI: | |
1341 | case elfcpp::R_PPC_REL16_HA: | |
1342 | { | |
1343 | if (gsym->needs_plt_entry()) | |
1344 | target->make_plt_entry(symtab, layout, gsym); | |
1345 | // Make a dynamic relocation if necessary. | |
1346 | int flags = Symbol::NON_PIC_REF; | |
1347 | if (gsym->type() == elfcpp::STT_FUNC) | |
1348 | flags |= Symbol::FUNCTION_CALL; | |
1349 | if (gsym->needs_dynamic_reloc(flags)) | |
1350 | { | |
966d4097 | 1351 | if (gsym->may_need_copy_reloc()) |
42cacb20 DE |
1352 | { |
1353 | target->copy_reloc(symtab, layout, object, | |
1354 | data_shndx, output_section, gsym, | |
1355 | reloc); | |
1356 | } | |
1357 | else | |
1358 | { | |
1359 | Reloc_section* rela_dyn = target->rela_dyn_section(layout); | |
1360 | check_non_pic(object, r_type); | |
1361 | rela_dyn->add_global(gsym, r_type, output_section, object, | |
1362 | data_shndx, reloc.get_r_offset(), | |
1363 | reloc.get_r_addend()); | |
1364 | } | |
1365 | } | |
1366 | } | |
1367 | break; | |
1368 | ||
1369 | case elfcpp::R_POWERPC_GOT16: | |
1370 | case elfcpp::R_POWERPC_GOT16_LO: | |
1371 | case elfcpp::R_POWERPC_GOT16_HI: | |
1372 | case elfcpp::R_POWERPC_GOT16_HA: | |
1373 | case elfcpp::R_PPC64_TOC16: | |
1374 | case elfcpp::R_PPC64_TOC16_LO: | |
1375 | case elfcpp::R_PPC64_TOC16_HI: | |
1376 | case elfcpp::R_PPC64_TOC16_HA: | |
1377 | case elfcpp::R_PPC64_TOC16_DS: | |
1378 | case elfcpp::R_PPC64_TOC16_LO_DS: | |
1379 | { | |
1380 | // The symbol requires a GOT entry. | |
1381 | Output_data_got<size, big_endian>* got; | |
1382 | ||
1383 | got = target->got_section(symtab, layout); | |
1384 | if (gsym->final_value_is_known()) | |
1385 | got->add_global(gsym, GOT_TYPE_STANDARD); | |
1386 | else | |
1387 | { | |
1388 | // If this symbol is not fully resolved, we need to add a | |
1389 | // dynamic relocation for it. | |
1390 | Reloc_section* rela_dyn = target->rela_dyn_section(layout); | |
1391 | if (gsym->is_from_dynobj() | |
1392 | || gsym->is_undefined() | |
1393 | || gsym->is_preemptible()) | |
1394 | got->add_global_with_rela(gsym, GOT_TYPE_STANDARD, rela_dyn, | |
1395 | elfcpp::R_POWERPC_GLOB_DAT); | |
1396 | else if (!gsym->has_got_offset(GOT_TYPE_STANDARD)) | |
1397 | { | |
1398 | unsigned int off = got->add_constant(0); | |
1399 | ||
1400 | gsym->set_got_offset(GOT_TYPE_STANDARD, off); | |
1401 | rela_dyn->add_global_relative(gsym, elfcpp::R_POWERPC_RELATIVE, | |
1402 | got, off, 0); | |
1403 | } | |
1404 | } | |
1405 | } | |
1406 | break; | |
1407 | ||
1408 | case elfcpp::R_PPC64_TOC: | |
1409 | // We need a GOT section. | |
1410 | target->got_section(symtab, layout); | |
1411 | break; | |
1412 | ||
1413 | case elfcpp::R_POWERPC_GOT_TPREL16: | |
1414 | case elfcpp::R_POWERPC_TLS: | |
1415 | // XXX TLS | |
1416 | break; | |
1417 | ||
1418 | // These are relocations which should only be seen by the | |
1419 | // dynamic linker, and should never be seen here. | |
1420 | case elfcpp::R_POWERPC_COPY: | |
1421 | case elfcpp::R_POWERPC_GLOB_DAT: | |
1422 | case elfcpp::R_POWERPC_JMP_SLOT: | |
1423 | case elfcpp::R_POWERPC_RELATIVE: | |
1424 | case elfcpp::R_POWERPC_DTPMOD: | |
1425 | gold_error(_("%s: unexpected reloc %u in object file"), | |
1426 | object->name().c_str(), r_type); | |
1427 | break; | |
1428 | ||
1429 | default: | |
1430 | unsupported_reloc_global(object, r_type, gsym); | |
1431 | break; | |
1432 | } | |
1433 | } | |
1434 | ||
6d03d481 ST |
1435 | // Process relocations for gc. |
1436 | ||
1437 | template<int size, bool big_endian> | |
1438 | void | |
1439 | Target_powerpc<size, big_endian>::gc_process_relocs( | |
6d03d481 ST |
1440 | Symbol_table* symtab, |
1441 | Layout* layout, | |
1442 | Sized_relobj<size, big_endian>* object, | |
1443 | unsigned int data_shndx, | |
1444 | unsigned int, | |
1445 | const unsigned char* prelocs, | |
1446 | size_t reloc_count, | |
1447 | Output_section* output_section, | |
1448 | bool needs_special_offset_handling, | |
1449 | size_t local_symbol_count, | |
1450 | const unsigned char* plocal_symbols) | |
1451 | { | |
1452 | typedef Target_powerpc<size, big_endian> Powerpc; | |
1453 | typedef typename Target_powerpc<size, big_endian>::Scan Scan; | |
1454 | ||
1455 | gold::gc_process_relocs<size, big_endian, Powerpc, elfcpp::SHT_RELA, Scan>( | |
6d03d481 ST |
1456 | symtab, |
1457 | layout, | |
1458 | this, | |
1459 | object, | |
1460 | data_shndx, | |
1461 | prelocs, | |
1462 | reloc_count, | |
1463 | output_section, | |
1464 | needs_special_offset_handling, | |
1465 | local_symbol_count, | |
1466 | plocal_symbols); | |
1467 | } | |
1468 | ||
42cacb20 DE |
1469 | // Scan relocations for a section. |
1470 | ||
1471 | template<int size, bool big_endian> | |
1472 | void | |
1473 | Target_powerpc<size, big_endian>::scan_relocs( | |
42cacb20 DE |
1474 | Symbol_table* symtab, |
1475 | Layout* layout, | |
1476 | Sized_relobj<size, big_endian>* object, | |
1477 | unsigned int data_shndx, | |
1478 | unsigned int sh_type, | |
1479 | const unsigned char* prelocs, | |
1480 | size_t reloc_count, | |
1481 | Output_section* output_section, | |
1482 | bool needs_special_offset_handling, | |
1483 | size_t local_symbol_count, | |
1484 | const unsigned char* plocal_symbols) | |
1485 | { | |
1486 | typedef Target_powerpc<size, big_endian> Powerpc; | |
1487 | typedef typename Target_powerpc<size, big_endian>::Scan Scan; | |
1488 | static Output_data_space* sdata; | |
1489 | ||
1490 | if (sh_type == elfcpp::SHT_REL) | |
1491 | { | |
1492 | gold_error(_("%s: unsupported REL reloc section"), | |
1493 | object->name().c_str()); | |
1494 | return; | |
1495 | } | |
1496 | ||
1497 | // Define _SDA_BASE_ at the start of the .sdata section. | |
1498 | if (sdata == NULL) | |
1499 | { | |
1500 | // layout->find_output_section(".sdata") == NULL | |
1501 | sdata = new Output_data_space(4, "** sdata"); | |
1502 | Output_section* os = layout->add_output_section_data(".sdata", 0, | |
1503 | elfcpp::SHF_ALLOC | |
1504 | | elfcpp::SHF_WRITE, | |
f5c870d2 | 1505 | sdata, false); |
42cacb20 DE |
1506 | symtab->define_in_output_data("_SDA_BASE_", NULL, |
1507 | os, | |
1508 | 32768, 0, | |
1509 | elfcpp::STT_OBJECT, | |
1510 | elfcpp::STB_LOCAL, | |
1511 | elfcpp::STV_HIDDEN, 0, | |
1512 | false, false); | |
1513 | } | |
1514 | ||
1515 | gold::scan_relocs<size, big_endian, Powerpc, elfcpp::SHT_RELA, Scan>( | |
42cacb20 DE |
1516 | symtab, |
1517 | layout, | |
1518 | this, | |
1519 | object, | |
1520 | data_shndx, | |
1521 | prelocs, | |
1522 | reloc_count, | |
1523 | output_section, | |
1524 | needs_special_offset_handling, | |
1525 | local_symbol_count, | |
1526 | plocal_symbols); | |
1527 | } | |
1528 | ||
1529 | // Finalize the sections. | |
1530 | ||
1531 | template<int size, bool big_endian> | |
1532 | void | |
d5b40221 DK |
1533 | Target_powerpc<size, big_endian>::do_finalize_sections( |
1534 | Layout* layout, | |
1535 | const Input_objects*) | |
42cacb20 DE |
1536 | { |
1537 | // Fill in some more dynamic tags. | |
1538 | Output_data_dynamic* const odyn = layout->dynamic_data(); | |
1539 | if (odyn != NULL) | |
1540 | { | |
22b127cc ILT |
1541 | if (this->plt_ != NULL |
1542 | && this->plt_->output_section() != NULL) | |
42cacb20 DE |
1543 | { |
1544 | const Output_data* od = this->plt_->rel_plt(); | |
1545 | odyn->add_section_size(elfcpp::DT_PLTRELSZ, od); | |
1546 | odyn->add_section_address(elfcpp::DT_JMPREL, od); | |
1547 | odyn->add_constant(elfcpp::DT_PLTREL, elfcpp::DT_RELA); | |
1548 | ||
1549 | odyn->add_section_address(elfcpp::DT_PLTGOT, this->plt_); | |
1550 | } | |
1551 | ||
22b127cc ILT |
1552 | if (this->rela_dyn_ != NULL |
1553 | && this->rela_dyn_->output_section() != NULL) | |
42cacb20 DE |
1554 | { |
1555 | const Output_data* od = this->rela_dyn_; | |
1556 | odyn->add_section_address(elfcpp::DT_RELA, od); | |
1557 | odyn->add_section_size(elfcpp::DT_RELASZ, od); | |
1558 | odyn->add_constant(elfcpp::DT_RELAENT, | |
1559 | elfcpp::Elf_sizes<size>::rela_size); | |
1560 | } | |
1561 | ||
1562 | if (!parameters->options().shared()) | |
1563 | { | |
1564 | // The value of the DT_DEBUG tag is filled in by the dynamic | |
1565 | // linker at run time, and used by the debugger. | |
1566 | odyn->add_constant(elfcpp::DT_DEBUG, 0); | |
1567 | } | |
1568 | } | |
1569 | ||
1570 | // Emit any relocs we saved in an attempt to avoid generating COPY | |
1571 | // relocs. | |
1572 | if (this->copy_relocs_.any_saved_relocs()) | |
1573 | this->copy_relocs_.emit(this->rela_dyn_section(layout)); | |
1574 | } | |
1575 | ||
1576 | // Perform a relocation. | |
1577 | ||
1578 | template<int size, bool big_endian> | |
1579 | inline bool | |
1580 | Target_powerpc<size, big_endian>::Relocate::relocate( | |
1581 | const Relocate_info<size, big_endian>* relinfo, | |
1582 | Target_powerpc* target, | |
031cdbed | 1583 | Output_section*, |
42cacb20 DE |
1584 | size_t relnum, |
1585 | const elfcpp::Rela<size, big_endian>& rela, | |
1586 | unsigned int r_type, | |
1587 | const Sized_symbol<size>* gsym, | |
1588 | const Symbol_value<size>* psymval, | |
1589 | unsigned char* view, | |
1590 | typename elfcpp::Elf_types<size>::Elf_Addr address, | |
1591 | section_size_type /* view_size */) | |
1592 | { | |
1593 | const unsigned int toc_base_offset = 0x8000; | |
1594 | typedef Powerpc_relocate_functions<size, big_endian> Reloc; | |
1595 | ||
1596 | // Pick the value to use for symbols defined in shared objects. | |
1597 | Symbol_value<size> symval; | |
1598 | if (gsym != NULL | |
de4c45bd ILT |
1599 | && gsym->use_plt_offset(r_type == elfcpp::R_POWERPC_REL24 |
1600 | || r_type == elfcpp::R_PPC_LOCAL24PC | |
1601 | || r_type == elfcpp::R_PPC_REL16 | |
1602 | || r_type == elfcpp::R_PPC_REL16_LO | |
1603 | || r_type == elfcpp::R_PPC_REL16_HI | |
1604 | || r_type == elfcpp::R_PPC_REL16_HA)) | |
42cacb20 DE |
1605 | { |
1606 | elfcpp::Elf_Xword value; | |
1607 | ||
1608 | value = target->plt_section()->address() + gsym->plt_offset(); | |
1609 | ||
1610 | symval.set_output_value(value); | |
1611 | ||
1612 | psymval = &symval; | |
1613 | } | |
1614 | ||
1615 | const Sized_relobj<size, big_endian>* object = relinfo->object; | |
1616 | elfcpp::Elf_Xword addend = rela.get_r_addend(); | |
1617 | ||
1618 | // Get the GOT offset if needed. Unlike i386 and x86_64, our GOT | |
1619 | // pointer points to the beginning, not the end, of the table. | |
1620 | // So we just use the plain offset. | |
1621 | bool have_got_offset = false; | |
1622 | unsigned int got_offset = 0; | |
1623 | unsigned int got2_offset = 0; | |
1624 | switch (r_type) | |
1625 | { | |
1626 | case elfcpp::R_PPC64_TOC16: | |
1627 | case elfcpp::R_PPC64_TOC16_LO: | |
1628 | case elfcpp::R_PPC64_TOC16_HI: | |
1629 | case elfcpp::R_PPC64_TOC16_HA: | |
1630 | case elfcpp::R_PPC64_TOC16_DS: | |
1631 | case elfcpp::R_PPC64_TOC16_LO_DS: | |
1632 | // Subtract the TOC base address. | |
1633 | addend -= target->toc_section()->address() + toc_base_offset; | |
1634 | /* FALLTHRU */ | |
1635 | ||
1636 | case elfcpp::R_POWERPC_GOT16: | |
1637 | case elfcpp::R_POWERPC_GOT16_LO: | |
1638 | case elfcpp::R_POWERPC_GOT16_HI: | |
1639 | case elfcpp::R_POWERPC_GOT16_HA: | |
1640 | case elfcpp::R_PPC64_GOT16_DS: | |
1641 | case elfcpp::R_PPC64_GOT16_LO_DS: | |
1642 | if (gsym != NULL) | |
1643 | { | |
1644 | gold_assert(gsym->has_got_offset(GOT_TYPE_STANDARD)); | |
1645 | got_offset = gsym->got_offset(GOT_TYPE_STANDARD); | |
1646 | } | |
1647 | else | |
1648 | { | |
1649 | unsigned int r_sym = elfcpp::elf_r_sym<size>(rela.get_r_info()); | |
1650 | gold_assert(object->local_has_got_offset(r_sym, GOT_TYPE_STANDARD)); | |
1651 | got_offset = object->local_got_offset(r_sym, GOT_TYPE_STANDARD); | |
1652 | } | |
1653 | have_got_offset = true; | |
1654 | break; | |
1655 | ||
1656 | // R_PPC_PLTREL24 is rather special. If non-zero, | |
1657 | // the addend specifies the GOT pointer offset within .got2. | |
1658 | case elfcpp::R_PPC_PLTREL24: | |
1659 | if (addend >= 32768) | |
1660 | { | |
1661 | Output_data_space* got2; | |
1662 | got2 = target->got2_section(); | |
1663 | got2_offset = got2->offset(); | |
1664 | addend += got2_offset; | |
1665 | } | |
1666 | have_got_offset = true; | |
1667 | break; | |
1668 | ||
1669 | default: | |
1670 | break; | |
1671 | } | |
1672 | ||
1673 | switch (r_type) | |
1674 | { | |
1675 | case elfcpp::R_POWERPC_NONE: | |
1676 | case elfcpp::R_POWERPC_GNU_VTINHERIT: | |
1677 | case elfcpp::R_POWERPC_GNU_VTENTRY: | |
1678 | break; | |
1679 | ||
1680 | case elfcpp::R_POWERPC_REL32: | |
1681 | Reloc::rel32(view, object, psymval, addend, address); | |
1682 | break; | |
1683 | ||
1684 | case elfcpp::R_POWERPC_REL24: | |
1685 | Reloc::rel24(view, object, psymval, addend, address); | |
1686 | break; | |
1687 | ||
1688 | case elfcpp::R_POWERPC_REL14: | |
1689 | Reloc::rel14(view, object, psymval, addend, address); | |
1690 | break; | |
1691 | ||
1692 | case elfcpp::R_PPC_PLTREL24: | |
1693 | Reloc::rel24(view, object, psymval, addend, address); | |
1694 | break; | |
1695 | ||
1696 | case elfcpp::R_PPC_LOCAL24PC: | |
1697 | Reloc::rel24(view, object, psymval, addend, address); | |
1698 | break; | |
1699 | ||
1700 | case elfcpp::R_PPC64_ADDR64: | |
1701 | if (!parameters->options().output_is_position_independent()) | |
1702 | Relocate_functions<size, big_endian>::rela64(view, object, | |
1703 | psymval, addend); | |
1704 | break; | |
1705 | ||
1706 | case elfcpp::R_POWERPC_ADDR32: | |
1707 | if (!parameters->options().output_is_position_independent()) | |
1708 | Relocate_functions<size, big_endian>::rela32(view, object, | |
1709 | psymval, addend); | |
1710 | break; | |
1711 | ||
1712 | case elfcpp::R_POWERPC_ADDR16_LO: | |
1713 | Reloc::addr16_lo(view, object, psymval, addend); | |
1714 | break; | |
1715 | ||
1716 | case elfcpp::R_POWERPC_ADDR16_HI: | |
1717 | Reloc::addr16_hi(view, object, psymval, addend); | |
1718 | break; | |
1719 | ||
1720 | case elfcpp::R_POWERPC_ADDR16_HA: | |
1721 | Reloc::addr16_ha(view, object, psymval, addend); | |
1722 | break; | |
1723 | ||
1724 | case elfcpp::R_PPC_REL16_LO: | |
1725 | Reloc::rel16_lo(view, object, psymval, addend, address); | |
1726 | break; | |
1727 | ||
1728 | case elfcpp::R_PPC_REL16_HI: | |
1729 | Reloc::rel16_lo(view, object, psymval, addend, address); | |
1730 | break; | |
1731 | ||
1732 | case elfcpp::R_PPC_REL16_HA: | |
83d22aa8 | 1733 | Reloc::rel16_ha(view, object, psymval, addend, address); |
42cacb20 DE |
1734 | break; |
1735 | ||
1736 | case elfcpp::R_POWERPC_GOT16: | |
1737 | Reloc::addr16(view, got_offset, addend); | |
1738 | break; | |
1739 | ||
1740 | case elfcpp::R_POWERPC_GOT16_LO: | |
1741 | Reloc::addr16_lo(view, got_offset, addend); | |
1742 | break; | |
1743 | ||
1744 | case elfcpp::R_POWERPC_GOT16_HI: | |
1745 | Reloc::addr16_hi(view, got_offset, addend); | |
1746 | break; | |
1747 | ||
1748 | case elfcpp::R_POWERPC_GOT16_HA: | |
1749 | Reloc::addr16_ha(view, got_offset, addend); | |
1750 | break; | |
1751 | ||
1752 | case elfcpp::R_PPC64_TOC16: | |
1753 | Reloc::addr16(view, got_offset, addend); | |
1754 | break; | |
1755 | ||
1756 | case elfcpp::R_PPC64_TOC16_LO: | |
1757 | Reloc::addr16_lo(view, got_offset, addend); | |
1758 | break; | |
1759 | ||
1760 | case elfcpp::R_PPC64_TOC16_HI: | |
1761 | Reloc::addr16_hi(view, got_offset, addend); | |
1762 | break; | |
1763 | ||
1764 | case elfcpp::R_PPC64_TOC16_HA: | |
1765 | Reloc::addr16_ha(view, got_offset, addend); | |
1766 | break; | |
1767 | ||
1768 | case elfcpp::R_PPC64_TOC16_DS: | |
1769 | case elfcpp::R_PPC64_TOC16_LO_DS: | |
1770 | Reloc::addr16_ds(view, got_offset, addend); | |
1771 | break; | |
1772 | ||
1773 | case elfcpp::R_PPC64_TOC: | |
1774 | { | |
1775 | elfcpp::Elf_types<64>::Elf_Addr value; | |
1776 | value = target->toc_section()->address() + toc_base_offset; | |
1777 | Relocate_functions<64, false>::rela64(view, value, addend); | |
1778 | } | |
1779 | break; | |
1780 | ||
1781 | case elfcpp::R_POWERPC_COPY: | |
1782 | case elfcpp::R_POWERPC_GLOB_DAT: | |
1783 | case elfcpp::R_POWERPC_JMP_SLOT: | |
1784 | case elfcpp::R_POWERPC_RELATIVE: | |
1785 | // This is an outstanding tls reloc, which is unexpected when | |
1786 | // linking. | |
1787 | case elfcpp::R_POWERPC_DTPMOD: | |
1788 | gold_error_at_location(relinfo, relnum, rela.get_r_offset(), | |
1789 | _("unexpected reloc %u in object file"), | |
1790 | r_type); | |
1791 | break; | |
1792 | ||
1793 | default: | |
1794 | gold_error_at_location(relinfo, relnum, rela.get_r_offset(), | |
1795 | _("unsupported reloc %u"), | |
1796 | r_type); | |
1797 | break; | |
1798 | } | |
1799 | ||
1800 | return true; | |
1801 | } | |
1802 | ||
1803 | // Perform a TLS relocation. | |
1804 | ||
1805 | template<int size, bool big_endian> | |
1806 | inline void | |
1807 | Target_powerpc<size, big_endian>::Relocate::relocate_tls( | |
1808 | const Relocate_info<size, big_endian>* relinfo, | |
1809 | Target_powerpc<size, big_endian>* target, | |
1810 | size_t relnum, | |
1811 | const elfcpp::Rela<size, big_endian>& rela, | |
1812 | unsigned int r_type, | |
1813 | const Sized_symbol<size>* gsym, | |
1814 | const Symbol_value<size>* psymval, | |
1815 | unsigned char* view, | |
1816 | typename elfcpp::Elf_types<size>::Elf_Addr address, | |
1817 | section_size_type) | |
1818 | { | |
1819 | Output_segment* tls_segment = relinfo->layout->tls_segment(); | |
1820 | typedef Powerpc_relocate_functions<size, big_endian> Reloc; | |
1821 | const Sized_relobj<size, big_endian>* object = relinfo->object; | |
1822 | ||
1823 | const elfcpp::Elf_Xword addend = rela.get_r_addend(); | |
1824 | typename elfcpp::Elf_types<size>::Elf_Addr value = psymval->value(object, 0); | |
1825 | ||
1826 | const bool is_final = | |
1827 | (gsym == NULL | |
1828 | ? !parameters->options().output_is_position_independent() | |
1829 | : gsym->final_value_is_known()); | |
1830 | const tls::Tls_optimization optimized_type | |
1831 | = optimize_tls_reloc(is_final, r_type); | |
1832 | ||
1833 | switch (r_type) | |
1834 | { | |
1835 | // XXX | |
1836 | } | |
1837 | } | |
1838 | ||
1839 | // Relocate section data. | |
1840 | ||
1841 | template<int size, bool big_endian> | |
1842 | void | |
1843 | Target_powerpc<size, big_endian>::relocate_section( | |
1844 | const Relocate_info<size, big_endian>* relinfo, | |
1845 | unsigned int sh_type, | |
1846 | const unsigned char* prelocs, | |
1847 | size_t reloc_count, | |
1848 | Output_section* output_section, | |
1849 | bool needs_special_offset_handling, | |
1850 | unsigned char* view, | |
1851 | typename elfcpp::Elf_types<size>::Elf_Addr address, | |
364c7fa5 ILT |
1852 | section_size_type view_size, |
1853 | const Reloc_symbol_changes* reloc_symbol_changes) | |
42cacb20 DE |
1854 | { |
1855 | typedef Target_powerpc<size, big_endian> Powerpc; | |
1856 | typedef typename Target_powerpc<size, big_endian>::Relocate Powerpc_relocate; | |
1857 | ||
1858 | gold_assert(sh_type == elfcpp::SHT_RELA); | |
1859 | ||
1860 | gold::relocate_section<size, big_endian, Powerpc, elfcpp::SHT_RELA, | |
1861 | Powerpc_relocate>( | |
1862 | relinfo, | |
1863 | this, | |
1864 | prelocs, | |
1865 | reloc_count, | |
1866 | output_section, | |
1867 | needs_special_offset_handling, | |
1868 | view, | |
1869 | address, | |
364c7fa5 ILT |
1870 | view_size, |
1871 | reloc_symbol_changes); | |
42cacb20 DE |
1872 | } |
1873 | ||
1874 | // Return the size of a relocation while scanning during a relocatable | |
1875 | // link. | |
1876 | ||
1877 | template<int size, bool big_endian> | |
1878 | unsigned int | |
1879 | Target_powerpc<size, big_endian>::Relocatable_size_for_reloc::get_size_for_reloc( | |
1880 | unsigned int, | |
1881 | Relobj*) | |
1882 | { | |
1883 | // We are always SHT_RELA, so we should never get here. | |
1884 | gold_unreachable(); | |
1885 | return 0; | |
1886 | } | |
1887 | ||
1888 | // Scan the relocs during a relocatable link. | |
1889 | ||
1890 | template<int size, bool big_endian> | |
1891 | void | |
1892 | Target_powerpc<size, big_endian>::scan_relocatable_relocs( | |
42cacb20 DE |
1893 | Symbol_table* symtab, |
1894 | Layout* layout, | |
1895 | Sized_relobj<size, big_endian>* object, | |
1896 | unsigned int data_shndx, | |
1897 | unsigned int sh_type, | |
1898 | const unsigned char* prelocs, | |
1899 | size_t reloc_count, | |
1900 | Output_section* output_section, | |
1901 | bool needs_special_offset_handling, | |
1902 | size_t local_symbol_count, | |
1903 | const unsigned char* plocal_symbols, | |
1904 | Relocatable_relocs* rr) | |
1905 | { | |
1906 | gold_assert(sh_type == elfcpp::SHT_RELA); | |
1907 | ||
1908 | typedef gold::Default_scan_relocatable_relocs<elfcpp::SHT_RELA, | |
1909 | Relocatable_size_for_reloc> Scan_relocatable_relocs; | |
1910 | ||
1911 | gold::scan_relocatable_relocs<size, big_endian, elfcpp::SHT_RELA, | |
1912 | Scan_relocatable_relocs>( | |
42cacb20 DE |
1913 | symtab, |
1914 | layout, | |
1915 | object, | |
1916 | data_shndx, | |
1917 | prelocs, | |
1918 | reloc_count, | |
1919 | output_section, | |
1920 | needs_special_offset_handling, | |
1921 | local_symbol_count, | |
1922 | plocal_symbols, | |
1923 | rr); | |
1924 | } | |
1925 | ||
1926 | // Relocate a section during a relocatable link. | |
1927 | ||
1928 | template<int size, bool big_endian> | |
1929 | void | |
1930 | Target_powerpc<size, big_endian>::relocate_for_relocatable( | |
1931 | const Relocate_info<size, big_endian>* relinfo, | |
1932 | unsigned int sh_type, | |
1933 | const unsigned char* prelocs, | |
1934 | size_t reloc_count, | |
1935 | Output_section* output_section, | |
1936 | off_t offset_in_output_section, | |
1937 | const Relocatable_relocs* rr, | |
1938 | unsigned char* view, | |
1939 | typename elfcpp::Elf_types<size>::Elf_Addr view_address, | |
1940 | section_size_type view_size, | |
1941 | unsigned char* reloc_view, | |
1942 | section_size_type reloc_view_size) | |
1943 | { | |
1944 | gold_assert(sh_type == elfcpp::SHT_RELA); | |
1945 | ||
1946 | gold::relocate_for_relocatable<size, big_endian, elfcpp::SHT_RELA>( | |
1947 | relinfo, | |
1948 | prelocs, | |
1949 | reloc_count, | |
1950 | output_section, | |
1951 | offset_in_output_section, | |
1952 | rr, | |
1953 | view, | |
1954 | view_address, | |
1955 | view_size, | |
1956 | reloc_view, | |
1957 | reloc_view_size); | |
1958 | } | |
1959 | ||
1960 | // Return the value to use for a dynamic which requires special | |
1961 | // treatment. This is how we support equality comparisons of function | |
1962 | // pointers across shared library boundaries, as described in the | |
1963 | // processor specific ABI supplement. | |
1964 | ||
1965 | template<int size, bool big_endian> | |
1966 | uint64_t | |
1967 | Target_powerpc<size, big_endian>::do_dynsym_value(const Symbol* gsym) const | |
1968 | { | |
1969 | gold_assert(gsym->is_from_dynobj() && gsym->has_plt_offset()); | |
1970 | return this->plt_section()->address() + gsym->plt_offset(); | |
1971 | } | |
1972 | ||
1973 | // The selector for powerpc object files. | |
1974 | ||
1975 | template<int size, bool big_endian> | |
1976 | class Target_selector_powerpc : public Target_selector | |
1977 | { | |
1978 | public: | |
1979 | Target_selector_powerpc() | |
1980 | : Target_selector(elfcpp::EM_NONE, size, big_endian, | |
1981 | (size == 64 ? | |
1982 | (big_endian ? "elf64-powerpc" : "elf64-powerpcle") : | |
1983 | (big_endian ? "elf32-powerpc" : "elf32-powerpcle"))) | |
1984 | { } | |
1985 | ||
42cacb20 DE |
1986 | Target* do_recognize(int machine, int, int) |
1987 | { | |
1988 | switch (size) | |
1989 | { | |
1990 | case 64: | |
1991 | if (machine != elfcpp::EM_PPC64) | |
1992 | return NULL; | |
1993 | break; | |
1994 | ||
1995 | case 32: | |
1996 | if (machine != elfcpp::EM_PPC) | |
1997 | return NULL; | |
1998 | break; | |
1999 | ||
2000 | default: | |
2001 | return NULL; | |
2002 | } | |
2003 | ||
7f055c20 | 2004 | return this->instantiate_target(); |
42cacb20 DE |
2005 | } |
2006 | ||
2007 | Target* do_instantiate_target() | |
7f055c20 | 2008 | { return new Target_powerpc<size, big_endian>(); } |
42cacb20 DE |
2009 | }; |
2010 | ||
2011 | Target_selector_powerpc<32, true> target_selector_ppc32; | |
2012 | Target_selector_powerpc<32, false> target_selector_ppc32le; | |
2013 | Target_selector_powerpc<64, true> target_selector_ppc64; | |
2014 | Target_selector_powerpc<64, false> target_selector_ppc64le; | |
2015 | ||
2016 | } // End anonymous namespace. |