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42cacb20 DE |
1 | // powerpc.cc -- powerpc target support for gold. |
2 | ||
2e702c99 | 3 | // Copyright 2008, 2009, 2010, 2011, 2012 Free Software Foundation, Inc. |
42cacb20 DE |
4 | // Written by David S. Miller <davem@davemloft.net> |
5 | // and David Edelsohn <edelsohn@gnu.org> | |
6 | ||
7 | // This file is part of gold. | |
8 | ||
9 | // This program is free software; you can redistribute it and/or modify | |
10 | // it under the terms of the GNU General Public License as published by | |
11 | // the Free Software Foundation; either version 3 of the License, or | |
12 | // (at your option) any later version. | |
13 | ||
14 | // This program is distributed in the hope that it will be useful, | |
15 | // but WITHOUT ANY WARRANTY; without even the implied warranty of | |
16 | // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
17 | // GNU General Public License for more details. | |
18 | ||
19 | // You should have received a copy of the GNU General Public License | |
20 | // along with this program; if not, write to the Free Software | |
21 | // Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston, | |
22 | // MA 02110-1301, USA. | |
23 | ||
24 | #include "gold.h" | |
25 | ||
26 | #include "elfcpp.h" | |
27 | #include "parameters.h" | |
28 | #include "reloc.h" | |
29 | #include "powerpc.h" | |
30 | #include "object.h" | |
31 | #include "symtab.h" | |
32 | #include "layout.h" | |
33 | #include "output.h" | |
34 | #include "copy-relocs.h" | |
35 | #include "target.h" | |
36 | #include "target-reloc.h" | |
37 | #include "target-select.h" | |
38 | #include "tls.h" | |
39 | #include "errors.h" | |
f345227a | 40 | #include "gc.h" |
42cacb20 DE |
41 | |
42 | namespace | |
43 | { | |
44 | ||
45 | using namespace gold; | |
46 | ||
47 | template<int size, bool big_endian> | |
48 | class Output_data_plt_powerpc; | |
49 | ||
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 | ||
2e702c99 | 65 | // Process the relocations to determine unreferenced sections for |
6d03d481 ST |
66 | // garbage collection. |
67 | void | |
ad0f2072 | 68 | gc_process_relocs(Symbol_table* symtab, |
2e702c99 RM |
69 | Layout* layout, |
70 | Sized_relobj_file<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); | |
6d03d481 | 79 | |
42cacb20 DE |
80 | // Scan the relocations to look for symbol adjustments. |
81 | void | |
ad0f2072 | 82 | scan_relocs(Symbol_table* symtab, |
42cacb20 | 83 | Layout* layout, |
6fa2a40b | 84 | Sized_relobj_file<size, big_endian>* object, |
42cacb20 DE |
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 | 118 | Layout* layout, |
6fa2a40b | 119 | Sized_relobj_file<size, big_endian>* object, |
42cacb20 DE |
120 | unsigned int data_shndx, |
121 | unsigned int sh_type, | |
122 | const unsigned char* prelocs, | |
123 | size_t reloc_count, | |
124 | Output_section* output_section, | |
125 | bool needs_special_offset_handling, | |
126 | size_t local_symbol_count, | |
127 | const unsigned char* plocal_symbols, | |
128 | 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 | |
0e70b911 | 154 | got_size() const |
42cacb20 DE |
155 | { |
156 | gold_assert(this->got_ != NULL); | |
157 | return this->got_->data_size(); | |
158 | } | |
159 | ||
0e70b911 CC |
160 | // Return the number of entries in the GOT. |
161 | unsigned int | |
162 | got_entry_count() const | |
163 | { | |
164 | if (this->got_ == NULL) | |
165 | return 0; | |
166 | return this->got_size() / (size / 8); | |
167 | } | |
168 | ||
169 | // Return the number of entries in the PLT. | |
170 | unsigned int | |
171 | plt_entry_count() const; | |
172 | ||
173 | // Return the offset of the first non-reserved PLT entry. | |
174 | unsigned int | |
175 | first_plt_entry_offset() const; | |
176 | ||
177 | // Return the size of each PLT entry. | |
178 | unsigned int | |
179 | plt_entry_size() const; | |
180 | ||
42cacb20 DE |
181 | private: |
182 | ||
183 | // The class which scans relocations. | |
184 | class Scan | |
185 | { | |
186 | public: | |
187 | Scan() | |
188 | : issued_non_pic_error_(false) | |
189 | { } | |
190 | ||
95a2c8d6 RS |
191 | static inline int |
192 | get_reference_flags(unsigned int r_type); | |
193 | ||
42cacb20 | 194 | inline void |
ad0f2072 | 195 | local(Symbol_table* symtab, Layout* layout, Target_powerpc* target, |
6fa2a40b | 196 | Sized_relobj_file<size, big_endian>* object, |
42cacb20 DE |
197 | unsigned int data_shndx, |
198 | Output_section* output_section, | |
199 | const elfcpp::Rela<size, big_endian>& reloc, unsigned int r_type, | |
200 | const elfcpp::Sym<size, big_endian>& lsym); | |
201 | ||
202 | inline void | |
ad0f2072 | 203 | global(Symbol_table* symtab, Layout* layout, Target_powerpc* target, |
6fa2a40b | 204 | Sized_relobj_file<size, big_endian>* object, |
42cacb20 DE |
205 | unsigned int data_shndx, |
206 | Output_section* output_section, | |
207 | const elfcpp::Rela<size, big_endian>& reloc, unsigned int r_type, | |
208 | Symbol* gsym); | |
209 | ||
21bb3914 ST |
210 | inline bool |
211 | local_reloc_may_be_function_pointer(Symbol_table* , Layout* , | |
212 | Target_powerpc* , | |
2e702c99 | 213 | Sized_relobj_file<size, big_endian>* , |
21bb3914 | 214 | unsigned int , |
2e702c99 RM |
215 | Output_section* , |
216 | const elfcpp::Rela<size, big_endian>& , | |
217 | unsigned int , | |
218 | const elfcpp::Sym<size, big_endian>&) | |
21bb3914 ST |
219 | { return false; } |
220 | ||
221 | inline bool | |
222 | global_reloc_may_be_function_pointer(Symbol_table* , Layout* , | |
223 | Target_powerpc* , | |
2e702c99 RM |
224 | Sized_relobj_file<size, big_endian>* , |
225 | unsigned int , | |
226 | Output_section* , | |
227 | const elfcpp::Rela<size, | |
21bb3914 ST |
228 | big_endian>& , |
229 | unsigned int , Symbol*) | |
230 | { return false; } | |
231 | ||
42cacb20 DE |
232 | private: |
233 | static void | |
6fa2a40b | 234 | unsupported_reloc_local(Sized_relobj_file<size, big_endian>*, |
42cacb20 DE |
235 | unsigned int r_type); |
236 | ||
237 | static void | |
6fa2a40b | 238 | unsupported_reloc_global(Sized_relobj_file<size, big_endian>*, |
42cacb20 DE |
239 | unsigned int r_type, Symbol*); |
240 | ||
241 | static void | |
242 | generate_tls_call(Symbol_table* symtab, Layout* layout, | |
243 | Target_powerpc* target); | |
244 | ||
245 | void | |
246 | check_non_pic(Relobj*, unsigned int r_type); | |
247 | ||
248 | // Whether we have issued an error about a non-PIC compilation. | |
249 | bool issued_non_pic_error_; | |
250 | }; | |
251 | ||
252 | // The class which implements relocation. | |
253 | class Relocate | |
254 | { | |
255 | public: | |
256 | // Do a relocation. Return false if the caller should not issue | |
257 | // any warnings about this relocation. | |
258 | inline bool | |
259 | relocate(const Relocate_info<size, big_endian>*, Target_powerpc*, | |
031cdbed ILT |
260 | Output_section*, size_t relnum, |
261 | const elfcpp::Rela<size, big_endian>&, | |
42cacb20 DE |
262 | unsigned int r_type, const Sized_symbol<size>*, |
263 | const Symbol_value<size>*, | |
264 | unsigned char*, | |
265 | typename elfcpp::Elf_types<size>::Elf_Addr, | |
266 | section_size_type); | |
267 | ||
268 | private: | |
269 | // Do a TLS relocation. | |
270 | inline void | |
271 | relocate_tls(const Relocate_info<size, big_endian>*, | |
272 | Target_powerpc* target, | |
2e702c99 | 273 | size_t relnum, const elfcpp::Rela<size, big_endian>&, |
42cacb20 DE |
274 | unsigned int r_type, const Sized_symbol<size>*, |
275 | const Symbol_value<size>*, | |
276 | unsigned char*, | |
277 | typename elfcpp::Elf_types<size>::Elf_Addr, | |
278 | section_size_type); | |
279 | }; | |
280 | ||
281 | // A class which returns the size required for a relocation type, | |
282 | // used while scanning relocs during a relocatable link. | |
283 | class Relocatable_size_for_reloc | |
284 | { | |
285 | public: | |
286 | unsigned int | |
287 | get_size_for_reloc(unsigned int, Relobj*); | |
288 | }; | |
289 | ||
290 | // Get the GOT section, creating it if necessary. | |
291 | Output_data_got<size, big_endian>* | |
292 | got_section(Symbol_table*, Layout*); | |
293 | ||
294 | Output_data_space* | |
295 | got2_section() const | |
296 | { | |
ca09d69a | 297 | gold_assert(this->got2_ != NULL); |
42cacb20 DE |
298 | return this->got2_; |
299 | } | |
300 | ||
301 | // Get the TOC section. | |
302 | Output_data_space* | |
303 | toc_section() const | |
304 | { | |
ca09d69a | 305 | gold_assert(this->toc_ != NULL); |
42cacb20 DE |
306 | return this->toc_; |
307 | } | |
308 | ||
309 | // Create a PLT entry for a global symbol. | |
310 | void | |
311 | make_plt_entry(Symbol_table*, Layout*, Symbol*); | |
312 | ||
313 | // Create a GOT entry for the TLS module index. | |
314 | unsigned int | |
315 | got_mod_index_entry(Symbol_table* symtab, Layout* layout, | |
6fa2a40b | 316 | Sized_relobj_file<size, big_endian>* object); |
42cacb20 DE |
317 | |
318 | // Get the PLT section. | |
319 | const Output_data_plt_powerpc<size, big_endian>* | |
320 | plt_section() const | |
321 | { | |
322 | gold_assert(this->plt_ != NULL); | |
323 | return this->plt_; | |
324 | } | |
325 | ||
326 | // Get the dynamic reloc section, creating it if necessary. | |
327 | Reloc_section* | |
328 | rela_dyn_section(Layout*); | |
329 | ||
42cacb20 DE |
330 | // Copy a relocation against a global symbol. |
331 | void | |
ef9beddf | 332 | copy_reloc(Symbol_table* symtab, Layout* layout, |
2e702c99 | 333 | Sized_relobj_file<size, big_endian>* object, |
42cacb20 DE |
334 | unsigned int shndx, Output_section* output_section, |
335 | Symbol* sym, const elfcpp::Rela<size, big_endian>& reloc) | |
336 | { | |
337 | this->copy_relocs_.copy_reloc(symtab, layout, | |
338 | symtab->get_sized_symbol<size>(sym), | |
339 | object, shndx, output_section, | |
340 | reloc, this->rela_dyn_section(layout)); | |
341 | } | |
342 | ||
343 | // Information about this specific target which we pass to the | |
344 | // general Target structure. | |
345 | static Target::Target_info powerpc_info; | |
346 | ||
347 | // The types of GOT entries needed for this platform. | |
0e70b911 CC |
348 | // These values are exposed to the ABI in an incremental link. |
349 | // Do not renumber existing values without changing the version | |
350 | // number of the .gnu_incremental_inputs section. | |
42cacb20 DE |
351 | enum Got_type |
352 | { | |
353 | GOT_TYPE_STANDARD = 0, // GOT entry for a regular symbol | |
354 | GOT_TYPE_TLS_OFFSET = 1, // GOT entry for TLS offset | |
355 | GOT_TYPE_TLS_PAIR = 2, // GOT entry for TLS module/offset pair | |
356 | }; | |
357 | ||
358 | // The GOT section. | |
359 | Output_data_got<size, big_endian>* got_; | |
360 | // The GOT2 section. | |
361 | Output_data_space* got2_; | |
362 | // The TOC section. | |
363 | Output_data_space* toc_; | |
364 | // The PLT section. | |
365 | Output_data_plt_powerpc<size, big_endian>* plt_; | |
366 | // The dynamic reloc section. | |
367 | Reloc_section* rela_dyn_; | |
368 | // Relocs saved to avoid a COPY reloc. | |
369 | Copy_relocs<elfcpp::SHT_RELA, size, big_endian> copy_relocs_; | |
370 | // Space for variables copied with a COPY reloc. | |
371 | Output_data_space* dynbss_; | |
372 | // Offset of the GOT entry for the TLS module index; | |
373 | unsigned int got_mod_index_offset_; | |
374 | }; | |
375 | ||
376 | template<> | |
377 | Target::Target_info Target_powerpc<32, true>::powerpc_info = | |
378 | { | |
379 | 32, // size | |
380 | true, // is_big_endian | |
381 | elfcpp::EM_PPC, // machine_code | |
382 | false, // has_make_symbol | |
383 | false, // has_resolve | |
384 | false, // has_code_fill | |
385 | true, // is_default_stack_executable | |
b3ce541e | 386 | false, // can_icf_inline_merge_sections |
42cacb20 DE |
387 | '\0', // wrap_char |
388 | "/usr/lib/ld.so.1", // dynamic_linker | |
389 | 0x10000000, // default_text_segment_address | |
390 | 64 * 1024, // abi_pagesize (overridable by -z max-page-size) | |
8a5e3e08 | 391 | 4 * 1024, // common_pagesize (overridable by -z common-page-size) |
2e702c99 RM |
392 | false, // isolate_execinstr |
393 | 0, // rosegment_gap | |
8a5e3e08 ILT |
394 | elfcpp::SHN_UNDEF, // small_common_shndx |
395 | elfcpp::SHN_UNDEF, // large_common_shndx | |
396 | 0, // small_common_section_flags | |
05a352e6 DK |
397 | 0, // large_common_section_flags |
398 | NULL, // attributes_section | |
399 | NULL // attributes_vendor | |
42cacb20 DE |
400 | }; |
401 | ||
402 | template<> | |
403 | Target::Target_info Target_powerpc<32, false>::powerpc_info = | |
404 | { | |
405 | 32, // size | |
406 | false, // is_big_endian | |
407 | elfcpp::EM_PPC, // machine_code | |
408 | false, // has_make_symbol | |
409 | false, // has_resolve | |
410 | false, // has_code_fill | |
411 | true, // is_default_stack_executable | |
b3ce541e | 412 | false, // can_icf_inline_merge_sections |
42cacb20 DE |
413 | '\0', // wrap_char |
414 | "/usr/lib/ld.so.1", // dynamic_linker | |
415 | 0x10000000, // default_text_segment_address | |
416 | 64 * 1024, // abi_pagesize (overridable by -z max-page-size) | |
8a5e3e08 | 417 | 4 * 1024, // common_pagesize (overridable by -z common-page-size) |
2e702c99 RM |
418 | false, // isolate_execinstr |
419 | 0, // rosegment_gap | |
8a5e3e08 ILT |
420 | elfcpp::SHN_UNDEF, // small_common_shndx |
421 | elfcpp::SHN_UNDEF, // large_common_shndx | |
422 | 0, // small_common_section_flags | |
05a352e6 DK |
423 | 0, // large_common_section_flags |
424 | NULL, // attributes_section | |
425 | NULL // attributes_vendor | |
42cacb20 DE |
426 | }; |
427 | ||
428 | template<> | |
429 | Target::Target_info Target_powerpc<64, true>::powerpc_info = | |
430 | { | |
431 | 64, // size | |
432 | true, // is_big_endian | |
433 | elfcpp::EM_PPC64, // machine_code | |
434 | false, // has_make_symbol | |
435 | false, // has_resolve | |
436 | false, // has_code_fill | |
437 | true, // is_default_stack_executable | |
b3ce541e | 438 | false, // can_icf_inline_merge_sections |
42cacb20 DE |
439 | '\0', // wrap_char |
440 | "/usr/lib/ld.so.1", // dynamic_linker | |
441 | 0x10000000, // default_text_segment_address | |
442 | 64 * 1024, // abi_pagesize (overridable by -z max-page-size) | |
8a5e3e08 | 443 | 8 * 1024, // common_pagesize (overridable by -z common-page-size) |
2e702c99 RM |
444 | false, // isolate_execinstr |
445 | 0, // rosegment_gap | |
8a5e3e08 ILT |
446 | elfcpp::SHN_UNDEF, // small_common_shndx |
447 | elfcpp::SHN_UNDEF, // large_common_shndx | |
448 | 0, // small_common_section_flags | |
05a352e6 DK |
449 | 0, // large_common_section_flags |
450 | NULL, // attributes_section | |
451 | NULL // attributes_vendor | |
42cacb20 DE |
452 | }; |
453 | ||
454 | template<> | |
455 | Target::Target_info Target_powerpc<64, false>::powerpc_info = | |
456 | { | |
457 | 64, // size | |
458 | false, // is_big_endian | |
459 | elfcpp::EM_PPC64, // machine_code | |
460 | false, // has_make_symbol | |
461 | false, // has_resolve | |
462 | false, // has_code_fill | |
463 | true, // is_default_stack_executable | |
b3ce541e | 464 | false, // can_icf_inline_merge_sections |
42cacb20 DE |
465 | '\0', // wrap_char |
466 | "/usr/lib/ld.so.1", // dynamic_linker | |
467 | 0x10000000, // default_text_segment_address | |
468 | 64 * 1024, // abi_pagesize (overridable by -z max-page-size) | |
8a5e3e08 | 469 | 8 * 1024, // common_pagesize (overridable by -z common-page-size) |
2e702c99 RM |
470 | false, // isolate_execinstr |
471 | 0, // rosegment_gap | |
8a5e3e08 ILT |
472 | elfcpp::SHN_UNDEF, // small_common_shndx |
473 | elfcpp::SHN_UNDEF, // large_common_shndx | |
474 | 0, // small_common_section_flags | |
05a352e6 DK |
475 | 0, // large_common_section_flags |
476 | NULL, // attributes_section | |
477 | NULL // attributes_vendor | |
42cacb20 DE |
478 | }; |
479 | ||
480 | template<int size, bool big_endian> | |
481 | class Powerpc_relocate_functions | |
482 | { | |
483 | private: | |
484 | // Do a simple relocation with the addend in the relocation. | |
485 | template<int valsize> | |
486 | static inline void | |
487 | rela(unsigned char* view, | |
488 | unsigned int right_shift, | |
489 | elfcpp::Elf_Xword dst_mask, | |
490 | typename elfcpp::Swap<size, big_endian>::Valtype value, | |
491 | typename elfcpp::Swap<size, big_endian>::Valtype addend) | |
492 | { | |
493 | typedef typename elfcpp::Swap<valsize, big_endian>::Valtype Valtype; | |
494 | Valtype* wv = reinterpret_cast<Valtype*>(view); | |
495 | Valtype val = elfcpp::Swap<valsize, big_endian>::readval(wv); | |
496 | Valtype reloc = ((value + addend) >> right_shift); | |
497 | ||
498 | val &= ~dst_mask; | |
499 | reloc &= dst_mask; | |
500 | ||
501 | elfcpp::Swap<valsize, big_endian>::writeval(wv, val | reloc); | |
502 | } | |
503 | ||
504 | // Do a simple relocation using a symbol value with the addend in | |
505 | // the relocation. | |
506 | template<int valsize> | |
507 | static inline void | |
508 | rela(unsigned char* view, | |
509 | unsigned int right_shift, | |
510 | elfcpp::Elf_Xword dst_mask, | |
6fa2a40b | 511 | const Sized_relobj_file<size, big_endian>* object, |
42cacb20 DE |
512 | const Symbol_value<size>* psymval, |
513 | typename elfcpp::Swap<valsize, big_endian>::Valtype addend) | |
514 | { | |
515 | typedef typename elfcpp::Swap<valsize, big_endian>::Valtype Valtype; | |
516 | Valtype* wv = reinterpret_cast<Valtype*>(view); | |
517 | Valtype val = elfcpp::Swap<valsize, big_endian>::readval(wv); | |
518 | Valtype reloc = (psymval->value(object, addend) >> right_shift); | |
519 | ||
520 | val &= ~dst_mask; | |
521 | reloc &= dst_mask; | |
522 | ||
523 | elfcpp::Swap<valsize, big_endian>::writeval(wv, val | reloc); | |
524 | } | |
525 | ||
526 | // Do a simple relocation using a symbol value with the addend in | |
527 | // the relocation, unaligned. | |
528 | template<int valsize> | |
529 | static inline void | |
530 | rela_ua(unsigned char* view, unsigned int right_shift, | |
531 | elfcpp::Elf_Xword dst_mask, | |
6fa2a40b | 532 | const Sized_relobj_file<size, big_endian>* object, |
42cacb20 DE |
533 | const Symbol_value<size>* psymval, |
534 | typename elfcpp::Swap<size, big_endian>::Valtype addend) | |
535 | { | |
536 | typedef typename elfcpp::Swap_unaligned<valsize, | |
537 | big_endian>::Valtype Valtype; | |
538 | unsigned char* wv = view; | |
539 | Valtype val = elfcpp::Swap_unaligned<valsize, big_endian>::readval(wv); | |
540 | Valtype reloc = (psymval->value(object, addend) >> right_shift); | |
541 | ||
542 | val &= ~dst_mask; | |
543 | reloc &= dst_mask; | |
544 | ||
545 | elfcpp::Swap_unaligned<valsize, big_endian>::writeval(wv, val | reloc); | |
546 | } | |
547 | ||
548 | // Do a simple PC relative relocation with a Symbol_value with the | |
549 | // addend in the relocation. | |
550 | template<int valsize> | |
551 | static inline void | |
552 | pcrela(unsigned char* view, unsigned int right_shift, | |
553 | elfcpp::Elf_Xword dst_mask, | |
6fa2a40b | 554 | const Sized_relobj_file<size, big_endian>* object, |
42cacb20 DE |
555 | const Symbol_value<size>* psymval, |
556 | typename elfcpp::Swap<size, big_endian>::Valtype addend, | |
557 | typename elfcpp::Elf_types<size>::Elf_Addr address) | |
558 | { | |
559 | typedef typename elfcpp::Swap<valsize, big_endian>::Valtype Valtype; | |
560 | Valtype* wv = reinterpret_cast<Valtype*>(view); | |
561 | Valtype val = elfcpp::Swap<valsize, big_endian>::readval(wv); | |
562 | Valtype reloc = ((psymval->value(object, addend) - address) | |
563 | >> right_shift); | |
564 | ||
565 | val &= ~dst_mask; | |
566 | reloc &= dst_mask; | |
567 | ||
568 | elfcpp::Swap<valsize, big_endian>::writeval(wv, val | reloc); | |
569 | } | |
570 | ||
571 | template<int valsize> | |
572 | static inline void | |
573 | pcrela_unaligned(unsigned char* view, | |
6fa2a40b | 574 | const Sized_relobj_file<size, big_endian>* object, |
42cacb20 DE |
575 | const Symbol_value<size>* psymval, |
576 | typename elfcpp::Swap<size, big_endian>::Valtype addend, | |
577 | typename elfcpp::Elf_types<size>::Elf_Addr address) | |
578 | { | |
579 | typedef typename elfcpp::Swap_unaligned<valsize, | |
580 | big_endian>::Valtype Valtype; | |
581 | unsigned char* wv = view; | |
582 | Valtype reloc = (psymval->value(object, addend) - address); | |
583 | ||
584 | elfcpp::Swap_unaligned<valsize, big_endian>::writeval(wv, reloc); | |
585 | } | |
586 | ||
587 | typedef Powerpc_relocate_functions<size, big_endian> This; | |
588 | typedef Relocate_functions<size, big_endian> This_reloc; | |
589 | public: | |
590 | // R_POWERPC_REL32: (Symbol + Addend - Address) | |
591 | static inline void | |
592 | rel32(unsigned char* view, | |
6fa2a40b | 593 | const Sized_relobj_file<size, big_endian>* object, |
42cacb20 DE |
594 | const Symbol_value<size>* psymval, |
595 | typename elfcpp::Elf_types<size>::Elf_Addr addend, | |
596 | typename elfcpp::Elf_types<size>::Elf_Addr address) | |
597 | { This_reloc::pcrela32(view, object, psymval, addend, address); } | |
598 | ||
599 | // R_POWERPC_REL24: (Symbol + Addend - Address) & 0x3fffffc | |
600 | static inline void | |
601 | rel24(unsigned char* view, | |
6fa2a40b | 602 | const Sized_relobj_file<size, big_endian>* object, |
42cacb20 DE |
603 | const Symbol_value<size>* psymval, |
604 | typename elfcpp::Elf_types<size>::Elf_Addr addend, | |
605 | typename elfcpp::Elf_types<size>::Elf_Addr address) | |
606 | { | |
607 | This::template pcrela<32>(view, 0, 0x03fffffc, object, | |
608 | psymval, addend, address); | |
609 | } | |
610 | ||
611 | // R_POWERPC_REL14: (Symbol + Addend - Address) & 0xfffc | |
612 | static inline void | |
613 | rel14(unsigned char* view, | |
6fa2a40b | 614 | const Sized_relobj_file<size, big_endian>* object, |
42cacb20 DE |
615 | const Symbol_value<size>* psymval, |
616 | typename elfcpp::Elf_types<size>::Elf_Addr addend, | |
617 | typename elfcpp::Elf_types<size>::Elf_Addr address) | |
618 | { | |
619 | This::template pcrela<32>(view, 0, 0x0000fffc, object, | |
620 | psymval, addend, address); | |
621 | } | |
622 | ||
623 | // R_POWERPC_ADDR16: (Symbol + Addend) & 0xffff | |
624 | static inline void | |
625 | addr16(unsigned char* view, | |
626 | typename elfcpp::Elf_types<size>::Elf_Addr value, | |
627 | typename elfcpp::Elf_types<size>::Elf_Addr addend) | |
628 | { This_reloc::rela16(view, value, addend); } | |
629 | ||
630 | static inline void | |
631 | addr16(unsigned char* view, | |
6fa2a40b | 632 | const Sized_relobj_file<size, big_endian>* object, |
42cacb20 DE |
633 | const Symbol_value<size>* psymval, |
634 | typename elfcpp::Elf_types<size>::Elf_Addr addend) | |
635 | { This_reloc::rela16(view, object, psymval, addend); } | |
636 | ||
637 | // R_POWERPC_ADDR16_DS: (Symbol + Addend) & 0xfffc | |
638 | static inline void | |
639 | addr16_ds(unsigned char* view, | |
640 | typename elfcpp::Elf_types<size>::Elf_Addr value, | |
641 | typename elfcpp::Elf_types<size>::Elf_Addr addend) | |
642 | { | |
643 | This::template rela<16>(view, 0, 0xfffc, value, addend); | |
644 | } | |
645 | ||
646 | // R_POWERPC_ADDR16_LO: (Symbol + Addend) & 0xffff | |
647 | static inline void | |
648 | addr16_lo(unsigned char* view, | |
649 | typename elfcpp::Elf_types<size>::Elf_Addr value, | |
650 | typename elfcpp::Elf_types<size>::Elf_Addr addend) | |
651 | { This_reloc::rela16(view, value, addend); } | |
652 | ||
653 | static inline void | |
654 | addr16_lo(unsigned char* view, | |
6fa2a40b | 655 | const Sized_relobj_file<size, big_endian>* object, |
42cacb20 DE |
656 | const Symbol_value<size>* psymval, |
657 | typename elfcpp::Elf_types<size>::Elf_Addr addend) | |
658 | { This_reloc::rela16(view, object, psymval, addend); } | |
659 | ||
660 | // R_POWERPC_ADDR16_HI: ((Symbol + Addend) >> 16) & 0xffff | |
661 | static inline void | |
662 | addr16_hi(unsigned char* view, | |
663 | typename elfcpp::Elf_types<size>::Elf_Addr value, | |
664 | typename elfcpp::Elf_types<size>::Elf_Addr addend) | |
665 | { | |
666 | This::template rela<16>(view, 16, 0xffff, value, addend); | |
667 | } | |
668 | ||
669 | static inline void | |
670 | addr16_hi(unsigned char* view, | |
6fa2a40b | 671 | const Sized_relobj_file<size, big_endian>* object, |
42cacb20 DE |
672 | const Symbol_value<size>* psymval, |
673 | typename elfcpp::Elf_types<size>::Elf_Addr addend) | |
674 | { | |
675 | This::template rela<16>(view, 16, 0xffff, object, psymval, addend); | |
676 | } | |
677 | ||
678 | // R_POWERPC_ADDR16_HA: Same as R_POWERPC_ADDR16_HI except that if the | |
679 | // final value of the low 16 bits of the | |
680 | // relocation is negative, add one. | |
681 | static inline void | |
682 | addr16_ha(unsigned char* view, | |
683 | typename elfcpp::Elf_types<size>::Elf_Addr value, | |
684 | typename elfcpp::Elf_types<size>::Elf_Addr addend) | |
685 | { | |
42cacb20 DE |
686 | typename elfcpp::Elf_types<size>::Elf_Addr reloc; |
687 | ||
688 | reloc = value + addend; | |
689 | ||
690 | if (reloc & 0x8000) | |
691 | reloc += 0x10000; | |
692 | reloc >>= 16; | |
693 | ||
e6fde208 | 694 | elfcpp::Swap<16, big_endian>::writeval(view, reloc); |
42cacb20 DE |
695 | } |
696 | ||
697 | static inline void | |
698 | addr16_ha(unsigned char* view, | |
6fa2a40b | 699 | const Sized_relobj_file<size, big_endian>* object, |
42cacb20 DE |
700 | const Symbol_value<size>* psymval, |
701 | typename elfcpp::Elf_types<size>::Elf_Addr addend) | |
702 | { | |
42cacb20 DE |
703 | typename elfcpp::Elf_types<size>::Elf_Addr reloc; |
704 | ||
705 | reloc = psymval->value(object, addend); | |
706 | ||
707 | if (reloc & 0x8000) | |
708 | reloc += 0x10000; | |
709 | reloc >>= 16; | |
710 | ||
e6fde208 | 711 | elfcpp::Swap<16, big_endian>::writeval(view, reloc); |
42cacb20 DE |
712 | } |
713 | ||
714 | // R_PPC_REL16: (Symbol + Addend - Address) & 0xffff | |
715 | static inline void | |
716 | rel16(unsigned char* view, | |
6fa2a40b | 717 | const Sized_relobj_file<size, big_endian>* object, |
42cacb20 DE |
718 | const Symbol_value<size>* psymval, |
719 | typename elfcpp::Elf_types<size>::Elf_Addr addend, | |
720 | typename elfcpp::Elf_types<size>::Elf_Addr address) | |
721 | { This_reloc::pcrela16(view, object, psymval, addend, address); } | |
722 | ||
723 | // R_PPC_REL16_LO: (Symbol + Addend - Address) & 0xffff | |
724 | static inline void | |
725 | rel16_lo(unsigned char* view, | |
6fa2a40b | 726 | const Sized_relobj_file<size, big_endian>* object, |
42cacb20 DE |
727 | const Symbol_value<size>* psymval, |
728 | typename elfcpp::Elf_types<size>::Elf_Addr addend, | |
729 | typename elfcpp::Elf_types<size>::Elf_Addr address) | |
730 | { This_reloc::pcrela16(view, object, psymval, addend, address); } | |
731 | ||
732 | // R_PPC_REL16_HI: ((Symbol + Addend - Address) >> 16) & 0xffff | |
733 | static inline void | |
734 | rel16_hi(unsigned char* view, | |
6fa2a40b | 735 | const Sized_relobj_file<size, big_endian>* object, |
42cacb20 DE |
736 | const Symbol_value<size>* psymval, |
737 | typename elfcpp::Elf_types<size>::Elf_Addr addend, | |
738 | typename elfcpp::Elf_types<size>::Elf_Addr address) | |
739 | { | |
740 | This::template pcrela<16>(view, 16, 0xffff, object, | |
741 | psymval, addend, address); | |
742 | } | |
743 | ||
744 | // R_PPC_REL16_HA: Same as R_PPC_REL16_HI except that if the | |
745 | // final value of the low 16 bits of the | |
746 | // relocation is negative, add one. | |
747 | static inline void | |
748 | rel16_ha(unsigned char* view, | |
6fa2a40b | 749 | const Sized_relobj_file<size, big_endian>* object, |
42cacb20 DE |
750 | const Symbol_value<size>* psymval, |
751 | typename elfcpp::Elf_types<size>::Elf_Addr addend, | |
752 | typename elfcpp::Elf_types<size>::Elf_Addr address) | |
753 | { | |
42cacb20 DE |
754 | typename elfcpp::Elf_types<size>::Elf_Addr reloc; |
755 | ||
756 | reloc = (psymval->value(object, addend) - address); | |
757 | if (reloc & 0x8000) | |
758 | reloc += 0x10000; | |
759 | reloc >>= 16; | |
760 | ||
83d22aa8 | 761 | elfcpp::Swap<16, big_endian>::writeval(view, reloc); |
42cacb20 DE |
762 | } |
763 | }; | |
764 | ||
765 | // Get the GOT section, creating it if necessary. | |
766 | ||
767 | template<int size, bool big_endian> | |
768 | Output_data_got<size, big_endian>* | |
769 | Target_powerpc<size, big_endian>::got_section(Symbol_table* symtab, | |
770 | Layout* layout) | |
771 | { | |
772 | if (this->got_ == NULL) | |
773 | { | |
774 | gold_assert(symtab != NULL && layout != NULL); | |
775 | ||
776 | this->got_ = new Output_data_got<size, big_endian>(); | |
777 | ||
778 | layout->add_output_section_data(".got", elfcpp::SHT_PROGBITS, | |
779 | elfcpp::SHF_ALLOC | elfcpp::SHF_WRITE, | |
22f0da72 | 780 | this->got_, ORDER_DATA, false); |
42cacb20 DE |
781 | |
782 | // Create the GOT2 or TOC in the .got section. | |
783 | if (size == 32) | |
784 | { | |
785 | this->got2_ = new Output_data_space(4, "** GOT2"); | |
786 | layout->add_output_section_data(".got2", elfcpp::SHT_PROGBITS, | |
787 | elfcpp::SHF_ALLOC | |
788 | | elfcpp::SHF_WRITE, | |
22f0da72 | 789 | this->got2_, ORDER_DATA, false); |
42cacb20 DE |
790 | } |
791 | else | |
792 | { | |
793 | this->toc_ = new Output_data_space(8, "** TOC"); | |
794 | layout->add_output_section_data(".toc", elfcpp::SHT_PROGBITS, | |
795 | elfcpp::SHF_ALLOC | |
796 | | elfcpp::SHF_WRITE, | |
22f0da72 | 797 | this->toc_, ORDER_DATA, false); |
42cacb20 DE |
798 | } |
799 | ||
800 | // Define _GLOBAL_OFFSET_TABLE_ at the start of the .got section. | |
801 | symtab->define_in_output_data("_GLOBAL_OFFSET_TABLE_", NULL, | |
99fff23b | 802 | Symbol_table::PREDEFINED, |
42cacb20 DE |
803 | this->got_, |
804 | 0, 0, elfcpp::STT_OBJECT, | |
805 | elfcpp::STB_LOCAL, | |
806 | elfcpp::STV_HIDDEN, 0, | |
807 | false, false); | |
808 | } | |
809 | ||
810 | return this->got_; | |
811 | } | |
812 | ||
813 | // Get the dynamic reloc section, creating it if necessary. | |
814 | ||
815 | template<int size, bool big_endian> | |
816 | typename Target_powerpc<size, big_endian>::Reloc_section* | |
817 | Target_powerpc<size, big_endian>::rela_dyn_section(Layout* layout) | |
818 | { | |
819 | if (this->rela_dyn_ == NULL) | |
820 | { | |
821 | gold_assert(layout != NULL); | |
822 | this->rela_dyn_ = new Reloc_section(parameters->options().combreloc()); | |
823 | layout->add_output_section_data(".rela.dyn", elfcpp::SHT_RELA, | |
22f0da72 ILT |
824 | elfcpp::SHF_ALLOC, this->rela_dyn_, |
825 | ORDER_DYNAMIC_RELOCS, false); | |
42cacb20 DE |
826 | } |
827 | return this->rela_dyn_; | |
828 | } | |
829 | ||
830 | // A class to handle the PLT data. | |
831 | ||
832 | template<int size, bool big_endian> | |
833 | class Output_data_plt_powerpc : public Output_section_data | |
834 | { | |
835 | public: | |
836 | typedef Output_data_reloc<elfcpp::SHT_RELA, true, | |
837 | size, big_endian> Reloc_section; | |
838 | ||
839 | Output_data_plt_powerpc(Layout*); | |
840 | ||
841 | // Add an entry to the PLT. | |
842 | void add_entry(Symbol* gsym); | |
843 | ||
844 | // Return the .rela.plt section data. | |
845 | const Reloc_section* rel_plt() const | |
846 | { | |
847 | return this->rel_; | |
848 | } | |
849 | ||
0e70b911 CC |
850 | // Return the number of PLT entries. |
851 | unsigned int | |
852 | entry_count() const | |
853 | { return this->count_; } | |
854 | ||
855 | // Return the offset of the first non-reserved PLT entry. | |
856 | static unsigned int | |
857 | first_plt_entry_offset() | |
858 | { return 4 * base_plt_entry_size; } | |
859 | ||
860 | // Return the size of a PLT entry. | |
861 | static unsigned int | |
862 | get_plt_entry_size() | |
863 | { return base_plt_entry_size; } | |
864 | ||
42cacb20 DE |
865 | protected: |
866 | void do_adjust_output_section(Output_section* os); | |
867 | ||
868 | private: | |
869 | // The size of an entry in the PLT. | |
870 | static const int base_plt_entry_size = (size == 32 ? 16 : 24); | |
871 | ||
872 | // Set the final size. | |
873 | void | |
874 | set_final_data_size() | |
875 | { | |
876 | unsigned int full_count = this->count_ + 4; | |
877 | ||
878 | this->set_data_size(full_count * base_plt_entry_size); | |
879 | } | |
880 | ||
881 | // Write out the PLT data. | |
882 | void | |
883 | do_write(Output_file*); | |
884 | ||
885 | // The reloc section. | |
886 | Reloc_section* rel_; | |
887 | // The number of PLT entries. | |
888 | unsigned int count_; | |
889 | }; | |
890 | ||
891 | // Create the PLT section. The ordinary .got section is an argument, | |
892 | // since we need to refer to the start. | |
893 | ||
894 | template<int size, bool big_endian> | |
895 | Output_data_plt_powerpc<size, big_endian>::Output_data_plt_powerpc(Layout* layout) | |
896 | : Output_section_data(size == 32 ? 4 : 8), count_(0) | |
897 | { | |
898 | this->rel_ = new Reloc_section(false); | |
899 | layout->add_output_section_data(".rela.plt", elfcpp::SHT_RELA, | |
22f0da72 ILT |
900 | elfcpp::SHF_ALLOC, this->rel_, |
901 | ORDER_DYNAMIC_PLT_RELOCS, false); | |
42cacb20 DE |
902 | } |
903 | ||
904 | template<int size, bool big_endian> | |
905 | void | |
906 | Output_data_plt_powerpc<size, big_endian>::do_adjust_output_section(Output_section* os) | |
907 | { | |
908 | os->set_entsize(0); | |
909 | } | |
910 | ||
911 | // Add an entry to the PLT. | |
912 | ||
913 | template<int size, bool big_endian> | |
914 | void | |
915 | Output_data_plt_powerpc<size, big_endian>::add_entry(Symbol* gsym) | |
916 | { | |
917 | gold_assert(!gsym->has_plt_offset()); | |
918 | unsigned int index = this->count_+ + 4; | |
919 | section_offset_type plt_offset; | |
920 | ||
921 | if (index < 8192) | |
922 | plt_offset = index * base_plt_entry_size; | |
923 | else | |
924 | gold_unreachable(); | |
925 | ||
926 | gsym->set_plt_offset(plt_offset); | |
927 | ||
928 | ++this->count_; | |
929 | ||
930 | gsym->set_needs_dynsym_entry(); | |
931 | this->rel_->add_global(gsym, elfcpp::R_POWERPC_JMP_SLOT, this, | |
932 | plt_offset, 0); | |
933 | } | |
934 | ||
935 | static const unsigned int addis_11_11 = 0x3d6b0000; | |
936 | static const unsigned int addis_11_30 = 0x3d7e0000; | |
937 | static const unsigned int addis_12_12 = 0x3d8c0000; | |
938 | static const unsigned int addi_11_11 = 0x396b0000; | |
939 | static const unsigned int add_0_11_11 = 0x7c0b5a14; | |
940 | static const unsigned int add_11_0_11 = 0x7d605a14; | |
941 | static const unsigned int b = 0x48000000; | |
942 | static const unsigned int bcl_20_31 = 0x429f0005; | |
943 | static const unsigned int bctr = 0x4e800420; | |
944 | static const unsigned int lis_11 = 0x3d600000; | |
945 | static const unsigned int lis_12 = 0x3d800000; | |
946 | static const unsigned int lwzu_0_12 = 0x840c0000; | |
947 | static const unsigned int lwz_0_12 = 0x800c0000; | |
948 | static const unsigned int lwz_11_11 = 0x816b0000; | |
949 | static const unsigned int lwz_11_30 = 0x817e0000; | |
950 | static const unsigned int lwz_12_12 = 0x818c0000; | |
951 | static const unsigned int mflr_0 = 0x7c0802a6; | |
952 | static const unsigned int mflr_12 = 0x7d8802a6; | |
953 | static const unsigned int mtctr_0 = 0x7c0903a6; | |
954 | static const unsigned int mtctr_11 = 0x7d6903a6; | |
955 | static const unsigned int mtlr_0 = 0x7c0803a6; | |
956 | static const unsigned int nop = 0x60000000; | |
957 | static const unsigned int sub_11_11_12 = 0x7d6c5850; | |
958 | ||
959 | static const unsigned int addis_r12_r2 = 0x3d820000; /* addis %r12,%r2,xxx@ha */ | |
960 | static const unsigned int std_r2_40r1 = 0xf8410028; /* std %r2,40(%r1) */ | |
961 | static const unsigned int ld_r11_0r12 = 0xe96c0000; /* ld %r11,xxx+0@l(%r12) */ | |
962 | static const unsigned int ld_r2_0r12 = 0xe84c0000; /* ld %r2,xxx+8@l(%r12) */ | |
2e702c99 | 963 | /* ld %r11,xxx+16@l(%r12) */ |
42cacb20 DE |
964 | |
965 | ||
966 | // Write out the PLT. | |
967 | ||
968 | template<int size, bool big_endian> | |
969 | void | |
970 | Output_data_plt_powerpc<size, big_endian>::do_write(Output_file* of) | |
971 | { | |
2ea97941 | 972 | const off_t offset = this->offset(); |
42cacb20 DE |
973 | const section_size_type oview_size = |
974 | convert_to_section_size_type(this->data_size()); | |
2ea97941 | 975 | unsigned char* const oview = of->get_output_view(offset, oview_size); |
42cacb20 DE |
976 | unsigned char* pov = oview; |
977 | ||
978 | memset(pov, 0, base_plt_entry_size * 4); | |
979 | pov += base_plt_entry_size * 4; | |
980 | ||
981 | unsigned int plt_offset = base_plt_entry_size * 4; | |
982 | const unsigned int count = this->count_; | |
983 | ||
984 | if (size == 64) | |
985 | { | |
986 | for (unsigned int i = 0; i < count; i++) | |
987 | { | |
988 | } | |
989 | } | |
990 | else | |
991 | { | |
992 | for (unsigned int i = 0; i < count; i++) | |
993 | { | |
994 | elfcpp::Swap<32, true>::writeval(pov + 0x00, | |
995 | lwz_11_30 + plt_offset); | |
996 | elfcpp::Swap<32, true>::writeval(pov + 0x04, mtctr_11); | |
997 | elfcpp::Swap<32, true>::writeval(pov + 0x08, bctr); | |
ce3ac18a | 998 | elfcpp::Swap<32, true>::writeval(pov + 0x0c, nop); |
42cacb20 DE |
999 | pov += base_plt_entry_size; |
1000 | plt_offset += base_plt_entry_size; | |
1001 | } | |
1002 | } | |
1003 | ||
1004 | gold_assert(static_cast<section_size_type>(pov - oview) == oview_size); | |
1005 | ||
2ea97941 | 1006 | of->write_output_view(offset, oview_size, oview); |
42cacb20 DE |
1007 | } |
1008 | ||
1009 | // Create a PLT entry for a global symbol. | |
1010 | ||
1011 | template<int size, bool big_endian> | |
1012 | void | |
1013 | Target_powerpc<size, big_endian>::make_plt_entry(Symbol_table* symtab, | |
1014 | Layout* layout, | |
1015 | Symbol* gsym) | |
1016 | { | |
1017 | if (gsym->has_plt_offset()) | |
1018 | return; | |
1019 | ||
1020 | if (this->plt_ == NULL) | |
1021 | { | |
1022 | // Create the GOT section first. | |
1023 | this->got_section(symtab, layout); | |
1024 | ||
612a8d3d DM |
1025 | // Ensure that .rela.dyn always appears before .rela.plt This is |
1026 | // necessary due to how, on PowerPC and some other targets, .rela.dyn | |
1027 | // needs to include .rela.plt in it's range. | |
1028 | this->rela_dyn_section(layout); | |
1029 | ||
42cacb20 DE |
1030 | this->plt_ = new Output_data_plt_powerpc<size, big_endian>(layout); |
1031 | layout->add_output_section_data(".plt", elfcpp::SHT_PROGBITS, | |
1032 | (elfcpp::SHF_ALLOC | |
1033 | | elfcpp::SHF_EXECINSTR | |
1034 | | elfcpp::SHF_WRITE), | |
22f0da72 | 1035 | this->plt_, ORDER_PLT, false); |
42cacb20 DE |
1036 | |
1037 | // Define _PROCEDURE_LINKAGE_TABLE_ at the start of the .plt section. | |
1038 | symtab->define_in_output_data("_PROCEDURE_LINKAGE_TABLE_", NULL, | |
99fff23b | 1039 | Symbol_table::PREDEFINED, |
42cacb20 DE |
1040 | this->plt_, |
1041 | 0, 0, elfcpp::STT_OBJECT, | |
1042 | elfcpp::STB_LOCAL, | |
1043 | elfcpp::STV_HIDDEN, 0, | |
1044 | false, false); | |
1045 | } | |
1046 | ||
1047 | this->plt_->add_entry(gsym); | |
1048 | } | |
1049 | ||
0e70b911 CC |
1050 | // Return the number of entries in the PLT. |
1051 | ||
1052 | template<int size, bool big_endian> | |
1053 | unsigned int | |
1054 | Target_powerpc<size, big_endian>::plt_entry_count() const | |
1055 | { | |
1056 | if (this->plt_ == NULL) | |
1057 | return 0; | |
1058 | return this->plt_->entry_count(); | |
1059 | } | |
1060 | ||
1061 | // Return the offset of the first non-reserved PLT entry. | |
1062 | ||
1063 | template<int size, bool big_endian> | |
1064 | unsigned int | |
1065 | Target_powerpc<size, big_endian>::first_plt_entry_offset() const | |
1066 | { | |
1067 | return Output_data_plt_powerpc<size, big_endian>::first_plt_entry_offset(); | |
1068 | } | |
1069 | ||
1070 | // Return the size of each PLT entry. | |
1071 | ||
1072 | template<int size, bool big_endian> | |
1073 | unsigned int | |
1074 | Target_powerpc<size, big_endian>::plt_entry_size() const | |
1075 | { | |
1076 | return Output_data_plt_powerpc<size, big_endian>::get_plt_entry_size(); | |
1077 | } | |
1078 | ||
42cacb20 DE |
1079 | // Create a GOT entry for the TLS module index. |
1080 | ||
1081 | template<int size, bool big_endian> | |
1082 | unsigned int | |
6fa2a40b CC |
1083 | Target_powerpc<size, big_endian>::got_mod_index_entry( |
1084 | Symbol_table* symtab, | |
1085 | Layout* layout, | |
1086 | Sized_relobj_file<size, big_endian>* object) | |
42cacb20 DE |
1087 | { |
1088 | if (this->got_mod_index_offset_ == -1U) | |
1089 | { | |
1090 | gold_assert(symtab != NULL && layout != NULL && object != NULL); | |
1091 | Reloc_section* rela_dyn = this->rela_dyn_section(layout); | |
1092 | Output_data_got<size, big_endian>* got; | |
1093 | unsigned int got_offset; | |
1094 | ||
1095 | got = this->got_section(symtab, layout); | |
1096 | got_offset = got->add_constant(0); | |
1097 | rela_dyn->add_local(object, 0, elfcpp::R_POWERPC_DTPMOD, got, | |
1098 | got_offset, 0); | |
1099 | got->add_constant(0); | |
1100 | this->got_mod_index_offset_ = got_offset; | |
1101 | } | |
1102 | return this->got_mod_index_offset_; | |
1103 | } | |
1104 | ||
1105 | // Optimize the TLS relocation type based on what we know about the | |
1106 | // symbol. IS_FINAL is true if the final address of this symbol is | |
1107 | // known at link time. | |
1108 | ||
1109 | static tls::Tls_optimization | |
1110 | optimize_tls_reloc(bool /* is_final */, int r_type) | |
1111 | { | |
1112 | // If we are generating a shared library, then we can't do anything | |
1113 | // in the linker. | |
1114 | if (parameters->options().shared()) | |
1115 | return tls::TLSOPT_NONE; | |
1116 | switch (r_type) | |
1117 | { | |
1118 | // XXX | |
1119 | default: | |
1120 | gold_unreachable(); | |
1121 | } | |
1122 | } | |
1123 | ||
95a2c8d6 RS |
1124 | // Get the Reference_flags for a particular relocation. |
1125 | ||
1126 | template<int size, bool big_endian> | |
1127 | int | |
1128 | Target_powerpc<size, big_endian>::Scan::get_reference_flags( | |
1129 | unsigned int r_type) | |
1130 | { | |
1131 | switch (r_type) | |
1132 | { | |
1133 | case elfcpp::R_POWERPC_NONE: | |
1134 | case elfcpp::R_POWERPC_GNU_VTINHERIT: | |
1135 | case elfcpp::R_POWERPC_GNU_VTENTRY: | |
1136 | case elfcpp::R_PPC64_TOC: | |
1137 | // No symbol reference. | |
1138 | return 0; | |
1139 | ||
1140 | case elfcpp::R_POWERPC_ADDR16: | |
1141 | case elfcpp::R_POWERPC_ADDR16_LO: | |
1142 | case elfcpp::R_POWERPC_ADDR16_HI: | |
1143 | case elfcpp::R_POWERPC_ADDR16_HA: | |
1144 | case elfcpp::R_POWERPC_ADDR32: | |
1145 | case elfcpp::R_PPC64_ADDR64: | |
1146 | return Symbol::ABSOLUTE_REF; | |
1147 | ||
1148 | case elfcpp::R_POWERPC_REL24: | |
1149 | case elfcpp::R_PPC_LOCAL24PC: | |
1150 | case elfcpp::R_PPC_REL16: | |
1151 | case elfcpp::R_PPC_REL16_LO: | |
1152 | case elfcpp::R_PPC_REL16_HI: | |
1153 | case elfcpp::R_PPC_REL16_HA: | |
1154 | return Symbol::RELATIVE_REF; | |
1155 | ||
1156 | case elfcpp::R_PPC_PLTREL24: | |
1157 | return Symbol::FUNCTION_CALL | Symbol::RELATIVE_REF; | |
1158 | ||
1159 | case elfcpp::R_POWERPC_GOT16: | |
1160 | case elfcpp::R_POWERPC_GOT16_LO: | |
1161 | case elfcpp::R_POWERPC_GOT16_HI: | |
1162 | case elfcpp::R_POWERPC_GOT16_HA: | |
1163 | case elfcpp::R_PPC64_TOC16: | |
1164 | case elfcpp::R_PPC64_TOC16_LO: | |
1165 | case elfcpp::R_PPC64_TOC16_HI: | |
1166 | case elfcpp::R_PPC64_TOC16_HA: | |
1167 | case elfcpp::R_PPC64_TOC16_DS: | |
1168 | case elfcpp::R_PPC64_TOC16_LO_DS: | |
1169 | // Absolute in GOT. | |
1170 | return Symbol::ABSOLUTE_REF; | |
1171 | ||
1172 | case elfcpp::R_POWERPC_GOT_TPREL16: | |
1173 | case elfcpp::R_POWERPC_TLS: | |
1174 | return Symbol::TLS_REF; | |
1175 | ||
1176 | case elfcpp::R_POWERPC_COPY: | |
1177 | case elfcpp::R_POWERPC_GLOB_DAT: | |
1178 | case elfcpp::R_POWERPC_JMP_SLOT: | |
1179 | case elfcpp::R_POWERPC_RELATIVE: | |
1180 | case elfcpp::R_POWERPC_DTPMOD: | |
1181 | default: | |
1182 | // Not expected. We will give an error later. | |
1183 | return 0; | |
1184 | } | |
1185 | } | |
1186 | ||
42cacb20 DE |
1187 | // Report an unsupported relocation against a local symbol. |
1188 | ||
1189 | template<int size, bool big_endian> | |
1190 | void | |
1191 | Target_powerpc<size, big_endian>::Scan::unsupported_reloc_local( | |
6fa2a40b | 1192 | Sized_relobj_file<size, big_endian>* object, |
42cacb20 DE |
1193 | unsigned int r_type) |
1194 | { | |
1195 | gold_error(_("%s: unsupported reloc %u against local symbol"), | |
1196 | object->name().c_str(), r_type); | |
1197 | } | |
1198 | ||
1199 | // We are about to emit a dynamic relocation of type R_TYPE. If the | |
1200 | // dynamic linker does not support it, issue an error. | |
1201 | ||
1202 | template<int size, bool big_endian> | |
1203 | void | |
1204 | Target_powerpc<size, big_endian>::Scan::check_non_pic(Relobj* object, | |
1205 | unsigned int r_type) | |
1206 | { | |
1207 | gold_assert(r_type != elfcpp::R_POWERPC_NONE); | |
1208 | ||
1209 | // These are the relocation types supported by glibc for both 32-bit | |
1210 | // and 64-bit powerpc. | |
1211 | switch (r_type) | |
1212 | { | |
1213 | case elfcpp::R_POWERPC_RELATIVE: | |
1214 | case elfcpp::R_POWERPC_GLOB_DAT: | |
1215 | case elfcpp::R_POWERPC_DTPMOD: | |
1216 | case elfcpp::R_POWERPC_DTPREL: | |
1217 | case elfcpp::R_POWERPC_TPREL: | |
1218 | case elfcpp::R_POWERPC_JMP_SLOT: | |
1219 | case elfcpp::R_POWERPC_COPY: | |
1220 | case elfcpp::R_POWERPC_ADDR32: | |
1221 | case elfcpp::R_POWERPC_ADDR24: | |
1222 | case elfcpp::R_POWERPC_REL24: | |
1223 | return; | |
1224 | ||
1225 | default: | |
1226 | break; | |
1227 | } | |
1228 | ||
1229 | if (size == 64) | |
1230 | { | |
1231 | switch (r_type) | |
1232 | { | |
1233 | // These are the relocation types supported only on 64-bit. | |
1234 | case elfcpp::R_PPC64_ADDR64: | |
1235 | case elfcpp::R_PPC64_TPREL16_LO_DS: | |
1236 | case elfcpp::R_PPC64_TPREL16_DS: | |
1237 | case elfcpp::R_POWERPC_TPREL16: | |
1238 | case elfcpp::R_POWERPC_TPREL16_LO: | |
1239 | case elfcpp::R_POWERPC_TPREL16_HI: | |
1240 | case elfcpp::R_POWERPC_TPREL16_HA: | |
1241 | case elfcpp::R_PPC64_TPREL16_HIGHER: | |
1242 | case elfcpp::R_PPC64_TPREL16_HIGHEST: | |
1243 | case elfcpp::R_PPC64_TPREL16_HIGHERA: | |
1244 | case elfcpp::R_PPC64_TPREL16_HIGHESTA: | |
1245 | case elfcpp::R_PPC64_ADDR16_LO_DS: | |
1246 | case elfcpp::R_POWERPC_ADDR16_LO: | |
1247 | case elfcpp::R_POWERPC_ADDR16_HI: | |
1248 | case elfcpp::R_POWERPC_ADDR16_HA: | |
1249 | case elfcpp::R_POWERPC_ADDR30: | |
1250 | case elfcpp::R_PPC64_UADDR64: | |
1251 | case elfcpp::R_POWERPC_UADDR32: | |
1252 | case elfcpp::R_POWERPC_ADDR16: | |
1253 | case elfcpp::R_POWERPC_UADDR16: | |
1254 | case elfcpp::R_PPC64_ADDR16_DS: | |
1255 | case elfcpp::R_PPC64_ADDR16_HIGHER: | |
1256 | case elfcpp::R_PPC64_ADDR16_HIGHEST: | |
1257 | case elfcpp::R_PPC64_ADDR16_HIGHERA: | |
1258 | case elfcpp::R_PPC64_ADDR16_HIGHESTA: | |
1259 | case elfcpp::R_POWERPC_ADDR14_BRTAKEN: | |
1260 | case elfcpp::R_POWERPC_ADDR14_BRNTAKEN: | |
1261 | case elfcpp::R_POWERPC_REL32: | |
1262 | case elfcpp::R_PPC64_REL64: | |
1263 | return; | |
1264 | ||
1265 | default: | |
1266 | break; | |
1267 | } | |
1268 | } | |
1269 | else | |
1270 | { | |
1271 | switch (r_type) | |
1272 | { | |
1273 | // These are the relocation types supported only on 32-bit. | |
1274 | ||
1275 | default: | |
1276 | break; | |
1277 | } | |
1278 | } | |
1279 | ||
1280 | // This prevents us from issuing more than one error per reloc | |
1281 | // section. But we can still wind up issuing more than one | |
1282 | // error per object file. | |
1283 | if (this->issued_non_pic_error_) | |
1284 | return; | |
33aea2fd | 1285 | gold_assert(parameters->options().output_is_position_independent()); |
42cacb20 DE |
1286 | object->error(_("requires unsupported dynamic reloc; " |
1287 | "recompile with -fPIC")); | |
1288 | this->issued_non_pic_error_ = true; | |
1289 | return; | |
1290 | } | |
1291 | ||
1292 | // Scan a relocation for a local symbol. | |
1293 | ||
1294 | template<int size, bool big_endian> | |
1295 | inline void | |
1296 | Target_powerpc<size, big_endian>::Scan::local( | |
42cacb20 DE |
1297 | Symbol_table* symtab, |
1298 | Layout* layout, | |
1299 | Target_powerpc<size, big_endian>* target, | |
6fa2a40b | 1300 | Sized_relobj_file<size, big_endian>* object, |
42cacb20 DE |
1301 | unsigned int data_shndx, |
1302 | Output_section* output_section, | |
1303 | const elfcpp::Rela<size, big_endian>& reloc, | |
1304 | unsigned int r_type, | |
1305 | const elfcpp::Sym<size, big_endian>& lsym) | |
1306 | { | |
1307 | switch (r_type) | |
1308 | { | |
1309 | case elfcpp::R_POWERPC_NONE: | |
1310 | case elfcpp::R_POWERPC_GNU_VTINHERIT: | |
1311 | case elfcpp::R_POWERPC_GNU_VTENTRY: | |
1312 | break; | |
1313 | ||
1314 | case elfcpp::R_PPC64_ADDR64: | |
1315 | case elfcpp::R_POWERPC_ADDR32: | |
1316 | case elfcpp::R_POWERPC_ADDR16_HA: | |
1317 | case elfcpp::R_POWERPC_ADDR16_LO: | |
1318 | // If building a shared library (or a position-independent | |
1319 | // executable), we need to create a dynamic relocation for | |
1320 | // this location. | |
1321 | if (parameters->options().output_is_position_independent()) | |
2e702c99 RM |
1322 | { |
1323 | Reloc_section* rela_dyn = target->rela_dyn_section(layout); | |
42cacb20 DE |
1324 | |
1325 | check_non_pic(object, r_type); | |
2e702c99 RM |
1326 | if (lsym.get_st_type() != elfcpp::STT_SECTION) |
1327 | { | |
1328 | unsigned int r_sym = elfcpp::elf_r_sym<size>(reloc.get_r_info()); | |
1329 | rela_dyn->add_local(object, r_sym, r_type, output_section, | |
42cacb20 DE |
1330 | data_shndx, reloc.get_r_offset(), |
1331 | reloc.get_r_addend()); | |
2e702c99 RM |
1332 | } |
1333 | else | |
1334 | { | |
42cacb20 | 1335 | unsigned int r_sym = elfcpp::elf_r_sym<size>(reloc.get_r_info()); |
2e702c99 RM |
1336 | gold_assert(lsym.get_st_value() == 0); |
1337 | rela_dyn->add_local_relative(object, r_sym, r_type, | |
42cacb20 DE |
1338 | output_section, data_shndx, |
1339 | reloc.get_r_offset(), | |
397b129b | 1340 | reloc.get_r_addend(), false); |
2e702c99 RM |
1341 | } |
1342 | } | |
42cacb20 DE |
1343 | break; |
1344 | ||
1345 | case elfcpp::R_POWERPC_REL24: | |
1346 | case elfcpp::R_PPC_LOCAL24PC: | |
1347 | case elfcpp::R_POWERPC_REL32: | |
1348 | case elfcpp::R_PPC_REL16_LO: | |
1349 | case elfcpp::R_PPC_REL16_HA: | |
1350 | break; | |
1351 | ||
1352 | case elfcpp::R_POWERPC_GOT16: | |
1353 | case elfcpp::R_POWERPC_GOT16_LO: | |
1354 | case elfcpp::R_POWERPC_GOT16_HI: | |
1355 | case elfcpp::R_POWERPC_GOT16_HA: | |
1356 | case elfcpp::R_PPC64_TOC16: | |
1357 | case elfcpp::R_PPC64_TOC16_LO: | |
1358 | case elfcpp::R_PPC64_TOC16_HI: | |
1359 | case elfcpp::R_PPC64_TOC16_HA: | |
1360 | case elfcpp::R_PPC64_TOC16_DS: | |
1361 | case elfcpp::R_PPC64_TOC16_LO_DS: | |
1362 | { | |
2e702c99 RM |
1363 | // The symbol requires a GOT entry. |
1364 | Output_data_got<size, big_endian>* got; | |
42cacb20 DE |
1365 | unsigned int r_sym; |
1366 | ||
1367 | got = target->got_section(symtab, layout); | |
1368 | r_sym = elfcpp::elf_r_sym<size>(reloc.get_r_info()); | |
1369 | ||
1370 | // If we are generating a shared object, we need to add a | |
1371 | // dynamic relocation for this symbol's GOT entry. | |
1372 | if (parameters->options().output_is_position_independent()) | |
1373 | { | |
1374 | if (!object->local_has_got_offset(r_sym, GOT_TYPE_STANDARD)) | |
1375 | { | |
1376 | Reloc_section* rela_dyn = target->rela_dyn_section(layout); | |
1377 | unsigned int off; | |
1378 | ||
1379 | off = got->add_constant(0); | |
1380 | object->set_local_got_offset(r_sym, GOT_TYPE_STANDARD, off); | |
1381 | rela_dyn->add_local_relative(object, r_sym, | |
1382 | elfcpp::R_POWERPC_RELATIVE, | |
397b129b | 1383 | got, off, 0, false); |
42cacb20 | 1384 | } |
2e702c99 | 1385 | } |
42cacb20 DE |
1386 | else |
1387 | got->add_local(object, r_sym, GOT_TYPE_STANDARD); | |
1388 | } | |
1389 | break; | |
1390 | ||
1391 | case elfcpp::R_PPC64_TOC: | |
1392 | // We need a GOT section. | |
1393 | target->got_section(symtab, layout); | |
1394 | break; | |
1395 | ||
1396 | // These are relocations which should only be seen by the | |
1397 | // dynamic linker, and should never be seen here. | |
1398 | case elfcpp::R_POWERPC_COPY: | |
1399 | case elfcpp::R_POWERPC_GLOB_DAT: | |
1400 | case elfcpp::R_POWERPC_JMP_SLOT: | |
1401 | case elfcpp::R_POWERPC_RELATIVE: | |
1402 | case elfcpp::R_POWERPC_DTPMOD: | |
1403 | gold_error(_("%s: unexpected reloc %u in object file"), | |
1404 | object->name().c_str(), r_type); | |
1405 | break; | |
1406 | ||
1407 | default: | |
1408 | unsupported_reloc_local(object, r_type); | |
1409 | break; | |
1410 | } | |
1411 | } | |
1412 | ||
1413 | // Report an unsupported relocation against a global symbol. | |
1414 | ||
1415 | template<int size, bool big_endian> | |
1416 | void | |
1417 | Target_powerpc<size, big_endian>::Scan::unsupported_reloc_global( | |
6fa2a40b | 1418 | Sized_relobj_file<size, big_endian>* object, |
42cacb20 DE |
1419 | unsigned int r_type, |
1420 | Symbol* gsym) | |
1421 | { | |
1422 | gold_error(_("%s: unsupported reloc %u against global symbol %s"), | |
1423 | object->name().c_str(), r_type, gsym->demangled_name().c_str()); | |
1424 | } | |
1425 | ||
1426 | // Scan a relocation for a global symbol. | |
1427 | ||
1428 | template<int size, bool big_endian> | |
1429 | inline void | |
1430 | Target_powerpc<size, big_endian>::Scan::global( | |
42cacb20 DE |
1431 | Symbol_table* symtab, |
1432 | Layout* layout, | |
1433 | Target_powerpc<size, big_endian>* target, | |
6fa2a40b | 1434 | Sized_relobj_file<size, big_endian>* object, |
42cacb20 DE |
1435 | unsigned int data_shndx, |
1436 | Output_section* output_section, | |
1437 | const elfcpp::Rela<size, big_endian>& reloc, | |
1438 | unsigned int r_type, | |
1439 | Symbol* gsym) | |
1440 | { | |
1441 | switch (r_type) | |
1442 | { | |
1443 | case elfcpp::R_POWERPC_NONE: | |
1444 | case elfcpp::R_POWERPC_GNU_VTINHERIT: | |
1445 | case elfcpp::R_POWERPC_GNU_VTENTRY: | |
1446 | break; | |
1447 | ||
1448 | case elfcpp::R_PPC_PLTREL24: | |
1449 | // If the symbol is fully resolved, this is just a PC32 reloc. | |
1450 | // Otherwise we need a PLT entry. | |
1451 | if (gsym->final_value_is_known()) | |
1452 | break; | |
1453 | // If building a shared library, we can also skip the PLT entry | |
1454 | // if the symbol is defined in the output file and is protected | |
1455 | // or hidden. | |
1456 | if (gsym->is_defined() | |
2e702c99 RM |
1457 | && !gsym->is_from_dynobj() |
1458 | && !gsym->is_preemptible()) | |
42cacb20 DE |
1459 | break; |
1460 | target->make_plt_entry(symtab, layout, gsym); | |
1461 | break; | |
1462 | ||
1463 | case elfcpp::R_POWERPC_ADDR16: | |
1464 | case elfcpp::R_POWERPC_ADDR16_LO: | |
1465 | case elfcpp::R_POWERPC_ADDR16_HI: | |
1466 | case elfcpp::R_POWERPC_ADDR16_HA: | |
1467 | case elfcpp::R_POWERPC_ADDR32: | |
1468 | case elfcpp::R_PPC64_ADDR64: | |
1469 | { | |
2e702c99 RM |
1470 | // Make a PLT entry if necessary. |
1471 | if (gsym->needs_plt_entry()) | |
1472 | { | |
1473 | target->make_plt_entry(symtab, layout, gsym); | |
1474 | // Since this is not a PC-relative relocation, we may be | |
1475 | // taking the address of a function. In that case we need to | |
1476 | // set the entry in the dynamic symbol table to the address of | |
1477 | // the PLT entry. | |
1478 | if (gsym->is_from_dynobj() && !parameters->options().shared()) | |
1479 | gsym->set_needs_dynsym_value(); | |
1480 | } | |
1481 | // Make a dynamic relocation if necessary. | |
1482 | if (gsym->needs_dynamic_reloc(Scan::get_reference_flags(r_type))) | |
1483 | { | |
1484 | if (gsym->may_need_copy_reloc()) | |
1485 | { | |
1486 | target->copy_reloc(symtab, layout, object, | |
1487 | data_shndx, output_section, gsym, reloc); | |
1488 | } | |
1489 | else if ((r_type == elfcpp::R_POWERPC_ADDR32 | |
42cacb20 | 1490 | || r_type == elfcpp::R_PPC64_ADDR64) |
2e702c99 RM |
1491 | && gsym->can_use_relative_reloc(false)) |
1492 | { | |
1493 | Reloc_section* rela_dyn = target->rela_dyn_section(layout); | |
1494 | rela_dyn->add_global_relative(gsym, elfcpp::R_POWERPC_RELATIVE, | |
42cacb20 DE |
1495 | output_section, object, |
1496 | data_shndx, reloc.get_r_offset(), | |
13cf9988 | 1497 | reloc.get_r_addend(), false); |
2e702c99 RM |
1498 | } |
1499 | else | |
1500 | { | |
1501 | Reloc_section* rela_dyn = target->rela_dyn_section(layout); | |
42cacb20 DE |
1502 | |
1503 | check_non_pic(object, r_type); | |
1504 | if (gsym->is_from_dynobj() | |
1505 | || gsym->is_undefined() | |
1506 | || gsym->is_preemptible()) | |
1507 | rela_dyn->add_global(gsym, r_type, output_section, | |
1508 | object, data_shndx, | |
1509 | reloc.get_r_offset(), | |
1510 | reloc.get_r_addend()); | |
1511 | else | |
1512 | rela_dyn->add_global_relative(gsym, r_type, | |
1513 | output_section, object, | |
1514 | data_shndx, | |
1515 | reloc.get_r_offset(), | |
13cf9988 | 1516 | reloc.get_r_addend(), false); |
2e702c99 RM |
1517 | } |
1518 | } | |
42cacb20 DE |
1519 | } |
1520 | break; | |
1521 | ||
1522 | case elfcpp::R_POWERPC_REL24: | |
1523 | case elfcpp::R_PPC_LOCAL24PC: | |
1524 | case elfcpp::R_PPC_REL16: | |
1525 | case elfcpp::R_PPC_REL16_LO: | |
1526 | case elfcpp::R_PPC_REL16_HI: | |
1527 | case elfcpp::R_PPC_REL16_HA: | |
1528 | { | |
1529 | if (gsym->needs_plt_entry()) | |
1530 | target->make_plt_entry(symtab, layout, gsym); | |
1531 | // Make a dynamic relocation if necessary. | |
95a2c8d6 | 1532 | if (gsym->needs_dynamic_reloc(Scan::get_reference_flags(r_type))) |
42cacb20 | 1533 | { |
966d4097 | 1534 | if (gsym->may_need_copy_reloc()) |
42cacb20 DE |
1535 | { |
1536 | target->copy_reloc(symtab, layout, object, | |
1537 | data_shndx, output_section, gsym, | |
1538 | reloc); | |
1539 | } | |
1540 | else | |
1541 | { | |
1542 | Reloc_section* rela_dyn = target->rela_dyn_section(layout); | |
1543 | check_non_pic(object, r_type); | |
1544 | rela_dyn->add_global(gsym, r_type, output_section, object, | |
1545 | data_shndx, reloc.get_r_offset(), | |
1546 | reloc.get_r_addend()); | |
1547 | } | |
1548 | } | |
1549 | } | |
1550 | break; | |
1551 | ||
1552 | case elfcpp::R_POWERPC_GOT16: | |
1553 | case elfcpp::R_POWERPC_GOT16_LO: | |
1554 | case elfcpp::R_POWERPC_GOT16_HI: | |
1555 | case elfcpp::R_POWERPC_GOT16_HA: | |
1556 | case elfcpp::R_PPC64_TOC16: | |
1557 | case elfcpp::R_PPC64_TOC16_LO: | |
1558 | case elfcpp::R_PPC64_TOC16_HI: | |
1559 | case elfcpp::R_PPC64_TOC16_HA: | |
1560 | case elfcpp::R_PPC64_TOC16_DS: | |
1561 | case elfcpp::R_PPC64_TOC16_LO_DS: | |
1562 | { | |
2e702c99 RM |
1563 | // The symbol requires a GOT entry. |
1564 | Output_data_got<size, big_endian>* got; | |
42cacb20 DE |
1565 | |
1566 | got = target->got_section(symtab, layout); | |
2e702c99 RM |
1567 | if (gsym->final_value_is_known()) |
1568 | got->add_global(gsym, GOT_TYPE_STANDARD); | |
1569 | else | |
1570 | { | |
1571 | // If this symbol is not fully resolved, we need to add a | |
1572 | // dynamic relocation for it. | |
1573 | Reloc_section* rela_dyn = target->rela_dyn_section(layout); | |
1574 | if (gsym->is_from_dynobj() | |
1575 | || gsym->is_undefined() | |
1576 | || gsym->is_preemptible()) | |
1577 | got->add_global_with_rel(gsym, GOT_TYPE_STANDARD, rela_dyn, | |
83896202 | 1578 | elfcpp::R_POWERPC_GLOB_DAT); |
2e702c99 RM |
1579 | else if (!gsym->has_got_offset(GOT_TYPE_STANDARD)) |
1580 | { | |
42cacb20 DE |
1581 | unsigned int off = got->add_constant(0); |
1582 | ||
1583 | gsym->set_got_offset(GOT_TYPE_STANDARD, off); | |
1584 | rela_dyn->add_global_relative(gsym, elfcpp::R_POWERPC_RELATIVE, | |
13cf9988 | 1585 | got, off, 0, false); |
42cacb20 | 1586 | } |
2e702c99 | 1587 | } |
42cacb20 DE |
1588 | } |
1589 | break; | |
1590 | ||
1591 | case elfcpp::R_PPC64_TOC: | |
1592 | // We need a GOT section. | |
1593 | target->got_section(symtab, layout); | |
1594 | break; | |
1595 | ||
1596 | case elfcpp::R_POWERPC_GOT_TPREL16: | |
1597 | case elfcpp::R_POWERPC_TLS: | |
1598 | // XXX TLS | |
1599 | break; | |
1600 | ||
1601 | // These are relocations which should only be seen by the | |
1602 | // dynamic linker, and should never be seen here. | |
1603 | case elfcpp::R_POWERPC_COPY: | |
1604 | case elfcpp::R_POWERPC_GLOB_DAT: | |
1605 | case elfcpp::R_POWERPC_JMP_SLOT: | |
1606 | case elfcpp::R_POWERPC_RELATIVE: | |
1607 | case elfcpp::R_POWERPC_DTPMOD: | |
1608 | gold_error(_("%s: unexpected reloc %u in object file"), | |
1609 | object->name().c_str(), r_type); | |
1610 | break; | |
1611 | ||
1612 | default: | |
1613 | unsupported_reloc_global(object, r_type, gsym); | |
1614 | break; | |
1615 | } | |
1616 | } | |
1617 | ||
6d03d481 ST |
1618 | // Process relocations for gc. |
1619 | ||
1620 | template<int size, bool big_endian> | |
1621 | void | |
1622 | Target_powerpc<size, big_endian>::gc_process_relocs( | |
6d03d481 ST |
1623 | Symbol_table* symtab, |
1624 | Layout* layout, | |
6fa2a40b | 1625 | Sized_relobj_file<size, big_endian>* object, |
6d03d481 ST |
1626 | unsigned int data_shndx, |
1627 | unsigned int, | |
1628 | const unsigned char* prelocs, | |
1629 | size_t reloc_count, | |
1630 | Output_section* output_section, | |
1631 | bool needs_special_offset_handling, | |
1632 | size_t local_symbol_count, | |
1633 | const unsigned char* plocal_symbols) | |
1634 | { | |
1635 | typedef Target_powerpc<size, big_endian> Powerpc; | |
2ea97941 | 1636 | typedef typename Target_powerpc<size, big_endian>::Scan Scan; |
6d03d481 | 1637 | |
41cbeecc | 1638 | gold::gc_process_relocs<size, big_endian, Powerpc, elfcpp::SHT_RELA, Scan, |
3ff2ccb0 | 1639 | typename Target_powerpc::Relocatable_size_for_reloc>( |
6d03d481 ST |
1640 | symtab, |
1641 | layout, | |
1642 | this, | |
1643 | object, | |
1644 | data_shndx, | |
1645 | prelocs, | |
1646 | reloc_count, | |
1647 | output_section, | |
1648 | needs_special_offset_handling, | |
1649 | local_symbol_count, | |
1650 | plocal_symbols); | |
1651 | } | |
1652 | ||
42cacb20 DE |
1653 | // Scan relocations for a section. |
1654 | ||
1655 | template<int size, bool big_endian> | |
1656 | void | |
1657 | Target_powerpc<size, big_endian>::scan_relocs( | |
42cacb20 DE |
1658 | Symbol_table* symtab, |
1659 | Layout* layout, | |
6fa2a40b | 1660 | Sized_relobj_file<size, big_endian>* object, |
42cacb20 DE |
1661 | unsigned int data_shndx, |
1662 | unsigned int sh_type, | |
1663 | const unsigned char* prelocs, | |
1664 | size_t reloc_count, | |
1665 | Output_section* output_section, | |
1666 | bool needs_special_offset_handling, | |
1667 | size_t local_symbol_count, | |
1668 | const unsigned char* plocal_symbols) | |
1669 | { | |
1670 | typedef Target_powerpc<size, big_endian> Powerpc; | |
2ea97941 | 1671 | typedef typename Target_powerpc<size, big_endian>::Scan Scan; |
42cacb20 DE |
1672 | static Output_data_space* sdata; |
1673 | ||
1674 | if (sh_type == elfcpp::SHT_REL) | |
1675 | { | |
1676 | gold_error(_("%s: unsupported REL reloc section"), | |
1677 | object->name().c_str()); | |
1678 | return; | |
1679 | } | |
1680 | ||
1681 | // Define _SDA_BASE_ at the start of the .sdata section. | |
1682 | if (sdata == NULL) | |
1683 | { | |
1684 | // layout->find_output_section(".sdata") == NULL | |
1685 | sdata = new Output_data_space(4, "** sdata"); | |
1686 | Output_section* os = layout->add_output_section_data(".sdata", 0, | |
1687 | elfcpp::SHF_ALLOC | |
1688 | | elfcpp::SHF_WRITE, | |
22f0da72 ILT |
1689 | sdata, |
1690 | ORDER_SMALL_DATA, | |
1691 | false); | |
42cacb20 | 1692 | symtab->define_in_output_data("_SDA_BASE_", NULL, |
99fff23b | 1693 | Symbol_table::PREDEFINED, |
42cacb20 DE |
1694 | os, |
1695 | 32768, 0, | |
1696 | elfcpp::STT_OBJECT, | |
1697 | elfcpp::STB_LOCAL, | |
1698 | elfcpp::STV_HIDDEN, 0, | |
1699 | false, false); | |
1700 | } | |
1701 | ||
2ea97941 | 1702 | gold::scan_relocs<size, big_endian, Powerpc, elfcpp::SHT_RELA, Scan>( |
42cacb20 DE |
1703 | symtab, |
1704 | layout, | |
1705 | this, | |
1706 | object, | |
1707 | data_shndx, | |
1708 | prelocs, | |
1709 | reloc_count, | |
1710 | output_section, | |
1711 | needs_special_offset_handling, | |
1712 | local_symbol_count, | |
1713 | plocal_symbols); | |
1714 | } | |
1715 | ||
1716 | // Finalize the sections. | |
1717 | ||
1718 | template<int size, bool big_endian> | |
1719 | void | |
d5b40221 DK |
1720 | Target_powerpc<size, big_endian>::do_finalize_sections( |
1721 | Layout* layout, | |
f59f41f3 DK |
1722 | const Input_objects*, |
1723 | Symbol_table*) | |
42cacb20 DE |
1724 | { |
1725 | // Fill in some more dynamic tags. | |
ea715a34 ILT |
1726 | const Reloc_section* rel_plt = (this->plt_ == NULL |
1727 | ? NULL | |
1728 | : this->plt_->rel_plt()); | |
1729 | layout->add_target_dynamic_tags(false, this->plt_, rel_plt, | |
612a8d3d | 1730 | this->rela_dyn_, true, size == 32); |
42cacb20 DE |
1731 | |
1732 | // Emit any relocs we saved in an attempt to avoid generating COPY | |
1733 | // relocs. | |
1734 | if (this->copy_relocs_.any_saved_relocs()) | |
1735 | this->copy_relocs_.emit(this->rela_dyn_section(layout)); | |
1736 | } | |
1737 | ||
1738 | // Perform a relocation. | |
1739 | ||
1740 | template<int size, bool big_endian> | |
1741 | inline bool | |
1742 | Target_powerpc<size, big_endian>::Relocate::relocate( | |
1743 | const Relocate_info<size, big_endian>* relinfo, | |
1744 | Target_powerpc* target, | |
031cdbed | 1745 | Output_section*, |
42cacb20 DE |
1746 | size_t relnum, |
1747 | const elfcpp::Rela<size, big_endian>& rela, | |
1748 | unsigned int r_type, | |
1749 | const Sized_symbol<size>* gsym, | |
1750 | const Symbol_value<size>* psymval, | |
1751 | unsigned char* view, | |
1752 | typename elfcpp::Elf_types<size>::Elf_Addr address, | |
1753 | section_size_type /* view_size */) | |
1754 | { | |
1755 | const unsigned int toc_base_offset = 0x8000; | |
1756 | typedef Powerpc_relocate_functions<size, big_endian> Reloc; | |
1757 | ||
1758 | // Pick the value to use for symbols defined in shared objects. | |
1759 | Symbol_value<size> symval; | |
1760 | if (gsym != NULL | |
95a2c8d6 | 1761 | && gsym->use_plt_offset(Scan::get_reference_flags(r_type))) |
42cacb20 DE |
1762 | { |
1763 | elfcpp::Elf_Xword value; | |
1764 | ||
1765 | value = target->plt_section()->address() + gsym->plt_offset(); | |
1766 | ||
1767 | symval.set_output_value(value); | |
1768 | ||
1769 | psymval = &symval; | |
1770 | } | |
1771 | ||
6fa2a40b | 1772 | const Sized_relobj_file<size, big_endian>* object = relinfo->object; |
42cacb20 DE |
1773 | elfcpp::Elf_Xword addend = rela.get_r_addend(); |
1774 | ||
1775 | // Get the GOT offset if needed. Unlike i386 and x86_64, our GOT | |
1776 | // pointer points to the beginning, not the end, of the table. | |
1777 | // So we just use the plain offset. | |
42cacb20 DE |
1778 | unsigned int got_offset = 0; |
1779 | unsigned int got2_offset = 0; | |
1780 | switch (r_type) | |
1781 | { | |
1782 | case elfcpp::R_PPC64_TOC16: | |
1783 | case elfcpp::R_PPC64_TOC16_LO: | |
1784 | case elfcpp::R_PPC64_TOC16_HI: | |
1785 | case elfcpp::R_PPC64_TOC16_HA: | |
1786 | case elfcpp::R_PPC64_TOC16_DS: | |
1787 | case elfcpp::R_PPC64_TOC16_LO_DS: | |
1788 | // Subtract the TOC base address. | |
1789 | addend -= target->toc_section()->address() + toc_base_offset; | |
1790 | /* FALLTHRU */ | |
1791 | ||
1792 | case elfcpp::R_POWERPC_GOT16: | |
1793 | case elfcpp::R_POWERPC_GOT16_LO: | |
1794 | case elfcpp::R_POWERPC_GOT16_HI: | |
1795 | case elfcpp::R_POWERPC_GOT16_HA: | |
1796 | case elfcpp::R_PPC64_GOT16_DS: | |
1797 | case elfcpp::R_PPC64_GOT16_LO_DS: | |
1798 | if (gsym != NULL) | |
2e702c99 RM |
1799 | { |
1800 | gold_assert(gsym->has_got_offset(GOT_TYPE_STANDARD)); | |
1801 | got_offset = gsym->got_offset(GOT_TYPE_STANDARD); | |
1802 | } | |
42cacb20 | 1803 | else |
2e702c99 RM |
1804 | { |
1805 | unsigned int r_sym = elfcpp::elf_r_sym<size>(rela.get_r_info()); | |
1806 | gold_assert(object->local_has_got_offset(r_sym, GOT_TYPE_STANDARD)); | |
1807 | got_offset = object->local_got_offset(r_sym, GOT_TYPE_STANDARD); | |
1808 | } | |
42cacb20 DE |
1809 | break; |
1810 | ||
1811 | // R_PPC_PLTREL24 is rather special. If non-zero, | |
2e702c99 | 1812 | // the addend specifies the GOT pointer offset within .got2. |
42cacb20 DE |
1813 | case elfcpp::R_PPC_PLTREL24: |
1814 | if (addend >= 32768) | |
1815 | { | |
1816 | Output_data_space* got2; | |
1817 | got2 = target->got2_section(); | |
1818 | got2_offset = got2->offset(); | |
1819 | addend += got2_offset; | |
1820 | } | |
42cacb20 DE |
1821 | break; |
1822 | ||
1823 | default: | |
1824 | break; | |
1825 | } | |
1826 | ||
1827 | switch (r_type) | |
1828 | { | |
1829 | case elfcpp::R_POWERPC_NONE: | |
1830 | case elfcpp::R_POWERPC_GNU_VTINHERIT: | |
1831 | case elfcpp::R_POWERPC_GNU_VTENTRY: | |
1832 | break; | |
1833 | ||
1834 | case elfcpp::R_POWERPC_REL32: | |
1835 | Reloc::rel32(view, object, psymval, addend, address); | |
1836 | break; | |
1837 | ||
1838 | case elfcpp::R_POWERPC_REL24: | |
1839 | Reloc::rel24(view, object, psymval, addend, address); | |
1840 | break; | |
1841 | ||
1842 | case elfcpp::R_POWERPC_REL14: | |
1843 | Reloc::rel14(view, object, psymval, addend, address); | |
1844 | break; | |
1845 | ||
1846 | case elfcpp::R_PPC_PLTREL24: | |
1847 | Reloc::rel24(view, object, psymval, addend, address); | |
1848 | break; | |
1849 | ||
1850 | case elfcpp::R_PPC_LOCAL24PC: | |
1851 | Reloc::rel24(view, object, psymval, addend, address); | |
1852 | break; | |
1853 | ||
1854 | case elfcpp::R_PPC64_ADDR64: | |
1855 | if (!parameters->options().output_is_position_independent()) | |
1856 | Relocate_functions<size, big_endian>::rela64(view, object, | |
1857 | psymval, addend); | |
1858 | break; | |
1859 | ||
1860 | case elfcpp::R_POWERPC_ADDR32: | |
1861 | if (!parameters->options().output_is_position_independent()) | |
1862 | Relocate_functions<size, big_endian>::rela32(view, object, | |
1863 | psymval, addend); | |
1864 | break; | |
1865 | ||
1866 | case elfcpp::R_POWERPC_ADDR16_LO: | |
1867 | Reloc::addr16_lo(view, object, psymval, addend); | |
1868 | break; | |
1869 | ||
1870 | case elfcpp::R_POWERPC_ADDR16_HI: | |
1871 | Reloc::addr16_hi(view, object, psymval, addend); | |
1872 | break; | |
1873 | ||
1874 | case elfcpp::R_POWERPC_ADDR16_HA: | |
1875 | Reloc::addr16_ha(view, object, psymval, addend); | |
1876 | break; | |
1877 | ||
1878 | case elfcpp::R_PPC_REL16_LO: | |
1879 | Reloc::rel16_lo(view, object, psymval, addend, address); | |
1880 | break; | |
1881 | ||
1882 | case elfcpp::R_PPC_REL16_HI: | |
1883 | Reloc::rel16_lo(view, object, psymval, addend, address); | |
1884 | break; | |
1885 | ||
1886 | case elfcpp::R_PPC_REL16_HA: | |
83d22aa8 | 1887 | Reloc::rel16_ha(view, object, psymval, addend, address); |
42cacb20 DE |
1888 | break; |
1889 | ||
1890 | case elfcpp::R_POWERPC_GOT16: | |
1891 | Reloc::addr16(view, got_offset, addend); | |
1892 | break; | |
1893 | ||
1894 | case elfcpp::R_POWERPC_GOT16_LO: | |
1895 | Reloc::addr16_lo(view, got_offset, addend); | |
1896 | break; | |
1897 | ||
1898 | case elfcpp::R_POWERPC_GOT16_HI: | |
1899 | Reloc::addr16_hi(view, got_offset, addend); | |
1900 | break; | |
1901 | ||
1902 | case elfcpp::R_POWERPC_GOT16_HA: | |
1903 | Reloc::addr16_ha(view, got_offset, addend); | |
1904 | break; | |
1905 | ||
1906 | case elfcpp::R_PPC64_TOC16: | |
1907 | Reloc::addr16(view, got_offset, addend); | |
1908 | break; | |
1909 | ||
1910 | case elfcpp::R_PPC64_TOC16_LO: | |
1911 | Reloc::addr16_lo(view, got_offset, addend); | |
1912 | break; | |
1913 | ||
1914 | case elfcpp::R_PPC64_TOC16_HI: | |
1915 | Reloc::addr16_hi(view, got_offset, addend); | |
1916 | break; | |
1917 | ||
1918 | case elfcpp::R_PPC64_TOC16_HA: | |
1919 | Reloc::addr16_ha(view, got_offset, addend); | |
1920 | break; | |
1921 | ||
1922 | case elfcpp::R_PPC64_TOC16_DS: | |
1923 | case elfcpp::R_PPC64_TOC16_LO_DS: | |
1924 | Reloc::addr16_ds(view, got_offset, addend); | |
1925 | break; | |
1926 | ||
1927 | case elfcpp::R_PPC64_TOC: | |
1928 | { | |
1929 | elfcpp::Elf_types<64>::Elf_Addr value; | |
1930 | value = target->toc_section()->address() + toc_base_offset; | |
1931 | Relocate_functions<64, false>::rela64(view, value, addend); | |
1932 | } | |
1933 | break; | |
1934 | ||
1935 | case elfcpp::R_POWERPC_COPY: | |
1936 | case elfcpp::R_POWERPC_GLOB_DAT: | |
1937 | case elfcpp::R_POWERPC_JMP_SLOT: | |
1938 | case elfcpp::R_POWERPC_RELATIVE: | |
1939 | // This is an outstanding tls reloc, which is unexpected when | |
1940 | // linking. | |
1941 | case elfcpp::R_POWERPC_DTPMOD: | |
1942 | gold_error_at_location(relinfo, relnum, rela.get_r_offset(), | |
1943 | _("unexpected reloc %u in object file"), | |
1944 | r_type); | |
1945 | break; | |
1946 | ||
1947 | default: | |
1948 | gold_error_at_location(relinfo, relnum, rela.get_r_offset(), | |
1949 | _("unsupported reloc %u"), | |
1950 | r_type); | |
1951 | break; | |
1952 | } | |
1953 | ||
1954 | return true; | |
1955 | } | |
1956 | ||
1957 | // Perform a TLS relocation. | |
1958 | ||
1959 | template<int size, bool big_endian> | |
1960 | inline void | |
1961 | Target_powerpc<size, big_endian>::Relocate::relocate_tls( | |
1962 | const Relocate_info<size, big_endian>* relinfo, | |
1963 | Target_powerpc<size, big_endian>* target, | |
1964 | size_t relnum, | |
1965 | const elfcpp::Rela<size, big_endian>& rela, | |
1966 | unsigned int r_type, | |
1967 | const Sized_symbol<size>* gsym, | |
1968 | const Symbol_value<size>* psymval, | |
1969 | unsigned char* view, | |
1970 | typename elfcpp::Elf_types<size>::Elf_Addr address, | |
1971 | section_size_type) | |
1972 | { | |
1973 | Output_segment* tls_segment = relinfo->layout->tls_segment(); | |
1974 | typedef Powerpc_relocate_functions<size, big_endian> Reloc; | |
6fa2a40b | 1975 | const Sized_relobj_file<size, big_endian>* object = relinfo->object; |
42cacb20 DE |
1976 | |
1977 | const elfcpp::Elf_Xword addend = rela.get_r_addend(); | |
1978 | typename elfcpp::Elf_types<size>::Elf_Addr value = psymval->value(object, 0); | |
1979 | ||
1980 | const bool is_final = | |
1981 | (gsym == NULL | |
1982 | ? !parameters->options().output_is_position_independent() | |
1983 | : gsym->final_value_is_known()); | |
1984 | const tls::Tls_optimization optimized_type | |
1985 | = optimize_tls_reloc(is_final, r_type); | |
1986 | ||
1987 | switch (r_type) | |
1988 | { | |
1989 | // XXX | |
1990 | } | |
1991 | } | |
1992 | ||
1993 | // Relocate section data. | |
1994 | ||
1995 | template<int size, bool big_endian> | |
1996 | void | |
1997 | Target_powerpc<size, big_endian>::relocate_section( | |
1998 | const Relocate_info<size, big_endian>* relinfo, | |
1999 | unsigned int sh_type, | |
2000 | const unsigned char* prelocs, | |
2001 | size_t reloc_count, | |
2002 | Output_section* output_section, | |
2003 | bool needs_special_offset_handling, | |
2004 | unsigned char* view, | |
2005 | typename elfcpp::Elf_types<size>::Elf_Addr address, | |
364c7fa5 ILT |
2006 | section_size_type view_size, |
2007 | const Reloc_symbol_changes* reloc_symbol_changes) | |
42cacb20 DE |
2008 | { |
2009 | typedef Target_powerpc<size, big_endian> Powerpc; | |
2010 | typedef typename Target_powerpc<size, big_endian>::Relocate Powerpc_relocate; | |
2011 | ||
2012 | gold_assert(sh_type == elfcpp::SHT_RELA); | |
2013 | ||
2014 | gold::relocate_section<size, big_endian, Powerpc, elfcpp::SHT_RELA, | |
2015 | Powerpc_relocate>( | |
2016 | relinfo, | |
2017 | this, | |
2018 | prelocs, | |
2019 | reloc_count, | |
2020 | output_section, | |
2021 | needs_special_offset_handling, | |
2022 | view, | |
2023 | address, | |
364c7fa5 ILT |
2024 | view_size, |
2025 | reloc_symbol_changes); | |
42cacb20 DE |
2026 | } |
2027 | ||
2028 | // Return the size of a relocation while scanning during a relocatable | |
2029 | // link. | |
2030 | ||
2031 | template<int size, bool big_endian> | |
2032 | unsigned int | |
2033 | Target_powerpc<size, big_endian>::Relocatable_size_for_reloc::get_size_for_reloc( | |
2034 | unsigned int, | |
2035 | Relobj*) | |
2036 | { | |
2037 | // We are always SHT_RELA, so we should never get here. | |
2038 | gold_unreachable(); | |
2039 | return 0; | |
2040 | } | |
2041 | ||
2042 | // Scan the relocs during a relocatable link. | |
2043 | ||
2044 | template<int size, bool big_endian> | |
2045 | void | |
2046 | Target_powerpc<size, big_endian>::scan_relocatable_relocs( | |
42cacb20 DE |
2047 | Symbol_table* symtab, |
2048 | Layout* layout, | |
6fa2a40b | 2049 | Sized_relobj_file<size, big_endian>* object, |
42cacb20 DE |
2050 | unsigned int data_shndx, |
2051 | unsigned int sh_type, | |
2052 | const unsigned char* prelocs, | |
2053 | size_t reloc_count, | |
2054 | Output_section* output_section, | |
2055 | bool needs_special_offset_handling, | |
2056 | size_t local_symbol_count, | |
2057 | const unsigned char* plocal_symbols, | |
2058 | Relocatable_relocs* rr) | |
2059 | { | |
2060 | gold_assert(sh_type == elfcpp::SHT_RELA); | |
2061 | ||
2062 | typedef gold::Default_scan_relocatable_relocs<elfcpp::SHT_RELA, | |
2063 | Relocatable_size_for_reloc> Scan_relocatable_relocs; | |
2064 | ||
2065 | gold::scan_relocatable_relocs<size, big_endian, elfcpp::SHT_RELA, | |
2066 | Scan_relocatable_relocs>( | |
42cacb20 DE |
2067 | symtab, |
2068 | layout, | |
2069 | object, | |
2070 | data_shndx, | |
2071 | prelocs, | |
2072 | reloc_count, | |
2073 | output_section, | |
2074 | needs_special_offset_handling, | |
2075 | local_symbol_count, | |
2076 | plocal_symbols, | |
2077 | rr); | |
2078 | } | |
2079 | ||
2080 | // Relocate a section during a relocatable link. | |
2081 | ||
2082 | template<int size, bool big_endian> | |
2083 | void | |
2084 | Target_powerpc<size, big_endian>::relocate_for_relocatable( | |
2085 | const Relocate_info<size, big_endian>* relinfo, | |
2086 | unsigned int sh_type, | |
2087 | const unsigned char* prelocs, | |
2088 | size_t reloc_count, | |
2089 | Output_section* output_section, | |
2090 | off_t offset_in_output_section, | |
2091 | const Relocatable_relocs* rr, | |
2092 | unsigned char* view, | |
2093 | typename elfcpp::Elf_types<size>::Elf_Addr view_address, | |
2094 | section_size_type view_size, | |
2095 | unsigned char* reloc_view, | |
2096 | section_size_type reloc_view_size) | |
2097 | { | |
2098 | gold_assert(sh_type == elfcpp::SHT_RELA); | |
2099 | ||
2100 | gold::relocate_for_relocatable<size, big_endian, elfcpp::SHT_RELA>( | |
2101 | relinfo, | |
2102 | prelocs, | |
2103 | reloc_count, | |
2104 | output_section, | |
2105 | offset_in_output_section, | |
2106 | rr, | |
2107 | view, | |
2108 | view_address, | |
2109 | view_size, | |
2110 | reloc_view, | |
2111 | reloc_view_size); | |
2112 | } | |
2113 | ||
2114 | // Return the value to use for a dynamic which requires special | |
2115 | // treatment. This is how we support equality comparisons of function | |
2116 | // pointers across shared library boundaries, as described in the | |
2117 | // processor specific ABI supplement. | |
2118 | ||
2119 | template<int size, bool big_endian> | |
2120 | uint64_t | |
2121 | Target_powerpc<size, big_endian>::do_dynsym_value(const Symbol* gsym) const | |
2122 | { | |
2123 | gold_assert(gsym->is_from_dynobj() && gsym->has_plt_offset()); | |
2124 | return this->plt_section()->address() + gsym->plt_offset(); | |
2125 | } | |
2126 | ||
2127 | // The selector for powerpc object files. | |
2128 | ||
2129 | template<int size, bool big_endian> | |
2130 | class Target_selector_powerpc : public Target_selector | |
2131 | { | |
2132 | public: | |
2133 | Target_selector_powerpc() | |
2134 | : Target_selector(elfcpp::EM_NONE, size, big_endian, | |
03ef7571 ILT |
2135 | (size == 64 |
2136 | ? (big_endian ? "elf64-powerpc" : "elf64-powerpcle") | |
2137 | : (big_endian ? "elf32-powerpc" : "elf32-powerpcle")), | |
2138 | (size == 64 | |
2139 | ? (big_endian ? "elf64ppc" : "elf64lppc") | |
2140 | : (big_endian ? "elf32ppc" : "elf32lppc"))) | |
42cacb20 DE |
2141 | { } |
2142 | ||
2e702c99 RM |
2143 | virtual Target* |
2144 | do_recognize(Input_file*, off_t, int machine, int, int) | |
42cacb20 DE |
2145 | { |
2146 | switch (size) | |
2147 | { | |
2148 | case 64: | |
2ea97941 | 2149 | if (machine != elfcpp::EM_PPC64) |
42cacb20 DE |
2150 | return NULL; |
2151 | break; | |
2152 | ||
2153 | case 32: | |
2ea97941 | 2154 | if (machine != elfcpp::EM_PPC) |
42cacb20 DE |
2155 | return NULL; |
2156 | break; | |
2157 | ||
2158 | default: | |
2159 | return NULL; | |
2160 | } | |
2161 | ||
7f055c20 | 2162 | return this->instantiate_target(); |
42cacb20 DE |
2163 | } |
2164 | ||
2e702c99 RM |
2165 | virtual Target* |
2166 | do_instantiate_target() | |
7f055c20 | 2167 | { return new Target_powerpc<size, big_endian>(); } |
42cacb20 DE |
2168 | }; |
2169 | ||
2170 | Target_selector_powerpc<32, true> target_selector_ppc32; | |
2171 | Target_selector_powerpc<32, false> target_selector_ppc32le; | |
2172 | Target_selector_powerpc<64, true> target_selector_ppc64; | |
2173 | Target_selector_powerpc<64, false> target_selector_ppc64le; | |
2174 | ||
2175 | } // End anonymous namespace. |