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1 | // arm.cc -- arm target support for gold. |
2 | ||
3 | // Copyright 2009 Free Software Foundation, Inc. | |
4 | // Written by Doug Kwan <dougkwan@google.com> based on the i386 code | |
5 | // by Ian Lance Taylor <iant@google.com>. | |
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 <cstring> | |
27 | #include <limits> | |
28 | #include <cstdio> | |
29 | #include <string> | |
30 | ||
31 | #include "elfcpp.h" | |
32 | #include "parameters.h" | |
33 | #include "reloc.h" | |
34 | #include "arm.h" | |
35 | #include "object.h" | |
36 | #include "symtab.h" | |
37 | #include "layout.h" | |
38 | #include "output.h" | |
39 | #include "copy-relocs.h" | |
40 | #include "target.h" | |
41 | #include "target-reloc.h" | |
42 | #include "target-select.h" | |
43 | #include "tls.h" | |
44 | #include "defstd.h" | |
45 | ||
46 | namespace | |
47 | { | |
48 | ||
49 | using namespace gold; | |
50 | ||
51 | // The arm target class. | |
52 | // | |
53 | // This is a very simple port of gold for ARM-EABI. It is intended for | |
54 | // supporting Android only for the time being. Only these relocation types | |
55 | // are supported. | |
56 | // | |
57 | // R_ARM_NONE | |
58 | // R_ARM_ABS32 | |
59 | // R_ARM_REL32 | |
60 | // R_ARM_THM_CALL | |
61 | // R_ARM_COPY | |
62 | // R_ARM_GLOB_DAT | |
63 | // R_ARM_BASE_PREL | |
64 | // R_ARM_JUMP_SLOT | |
65 | // R_ARM_RELATIVE | |
66 | // R_ARM_GOTOFF32 | |
67 | // R_ARM_GOT_BREL | |
68 | // R_ARM_PLT32 | |
69 | // R_ARM_CALL | |
70 | // R_ARM_JUMP24 | |
71 | // R_ARM_TARGET1 | |
72 | // R_ARM_PREL31 | |
73 | // | |
74 | // Coming soon (pending patches): | |
75 | // - Support for dynamic symbols (GOT, PLT and etc). | |
76 | // - Local scanner | |
77 | // - Global scanner | |
78 | // - Relocation | |
79 | // - Defining section symbols __exidx_start and __exidx_stop. | |
80 | // - Support interworking. | |
81 | // - Mergeing all .ARM.xxx.yyy sections into .ARM.xxx. Currently, they | |
82 | // are incorrectly merged into an .ARM section. | |
83 | // | |
84 | // TODOs: | |
85 | // - Create a PT_ARM_EXIDX program header for a shared object that | |
86 | // might throw an exception. | |
87 | // - Support more relocation types as needed. | |
88 | ||
89 | template<bool big_endian> | |
90 | class Target_arm : public Sized_target<32, big_endian> | |
91 | { | |
92 | public: | |
93 | typedef Output_data_reloc<elfcpp::SHT_REL, true, 32, big_endian> | |
94 | Reloc_section; | |
95 | ||
96 | Target_arm() | |
97 | : Sized_target<32, big_endian>(&arm_info) | |
98 | { } | |
99 | ||
100 | // Process the relocations to determine unreferenced sections for | |
101 | // garbage collection. | |
102 | void | |
103 | gc_process_relocs(const General_options& options, | |
104 | Symbol_table* symtab, | |
105 | Layout* layout, | |
106 | Sized_relobj<32, big_endian>* object, | |
107 | unsigned int data_shndx, | |
108 | unsigned int sh_type, | |
109 | const unsigned char* prelocs, | |
110 | size_t reloc_count, | |
111 | Output_section* output_section, | |
112 | bool needs_special_offset_handling, | |
113 | size_t local_symbol_count, | |
114 | const unsigned char* plocal_symbols); | |
115 | ||
116 | // Scan the relocations to look for symbol adjustments. | |
117 | void | |
118 | scan_relocs(const General_options& options, | |
119 | Symbol_table* symtab, | |
120 | Layout* layout, | |
121 | Sized_relobj<32, big_endian>* object, | |
122 | unsigned int data_shndx, | |
123 | unsigned int sh_type, | |
124 | const unsigned char* prelocs, | |
125 | size_t reloc_count, | |
126 | Output_section* output_section, | |
127 | bool needs_special_offset_handling, | |
128 | size_t local_symbol_count, | |
129 | const unsigned char* plocal_symbols); | |
130 | ||
131 | // Finalize the sections. | |
132 | void | |
133 | do_finalize_sections(Layout*); | |
134 | ||
135 | // Return the value to use for a dynamic which requires special | |
136 | // treatment. | |
137 | uint64_t | |
138 | do_dynsym_value(const Symbol*) const; | |
139 | ||
140 | // Relocate a section. | |
141 | void | |
142 | relocate_section(const Relocate_info<32, big_endian>*, | |
143 | unsigned int sh_type, | |
144 | const unsigned char* prelocs, | |
145 | size_t reloc_count, | |
146 | Output_section* output_section, | |
147 | bool needs_special_offset_handling, | |
148 | unsigned char* view, | |
149 | elfcpp::Elf_types<32>::Elf_Addr view_address, | |
150 | section_size_type view_size); | |
151 | ||
152 | // Scan the relocs during a relocatable link. | |
153 | void | |
154 | scan_relocatable_relocs(const General_options& options, | |
155 | Symbol_table* symtab, | |
156 | Layout* layout, | |
157 | Sized_relobj<32, big_endian>* object, | |
158 | unsigned int data_shndx, | |
159 | unsigned int sh_type, | |
160 | const unsigned char* prelocs, | |
161 | size_t reloc_count, | |
162 | Output_section* output_section, | |
163 | bool needs_special_offset_handling, | |
164 | size_t local_symbol_count, | |
165 | const unsigned char* plocal_symbols, | |
166 | Relocatable_relocs*); | |
167 | ||
168 | // Relocate a section during a relocatable link. | |
169 | void | |
170 | relocate_for_relocatable(const Relocate_info<32, big_endian>*, | |
171 | unsigned int sh_type, | |
172 | const unsigned char* prelocs, | |
173 | size_t reloc_count, | |
174 | Output_section* output_section, | |
175 | off_t offset_in_output_section, | |
176 | const Relocatable_relocs*, | |
177 | unsigned char* view, | |
178 | elfcpp::Elf_types<32>::Elf_Addr view_address, | |
179 | section_size_type view_size, | |
180 | unsigned char* reloc_view, | |
181 | section_size_type reloc_view_size); | |
182 | ||
183 | // Return whether SYM is defined by the ABI. | |
184 | bool | |
185 | do_is_defined_by_abi(Symbol* sym) const | |
186 | { return strcmp(sym->name(), "__tls_get_addr") == 0; } | |
187 | ||
188 | // Map platform-specific reloc types | |
189 | static unsigned int | |
190 | get_real_reloc_type (unsigned int r_type); | |
191 | ||
192 | private: | |
193 | // The class which scans relocations. | |
194 | class Scan | |
195 | { | |
196 | public: | |
197 | Scan() | |
198 | { } | |
199 | ||
200 | inline void | |
201 | local(const General_options& options, Symbol_table* symtab, | |
202 | Layout* layout, Target_arm* target, | |
203 | Sized_relobj<32, big_endian>* object, | |
204 | unsigned int data_shndx, | |
205 | Output_section* output_section, | |
206 | const elfcpp::Rel<32, big_endian>& reloc, unsigned int r_type, | |
207 | const elfcpp::Sym<32, big_endian>& lsym); | |
208 | ||
209 | inline void | |
210 | global(const General_options& options, Symbol_table* symtab, | |
211 | Layout* layout, Target_arm* target, | |
212 | Sized_relobj<32, big_endian>* object, | |
213 | unsigned int data_shndx, | |
214 | Output_section* output_section, | |
215 | const elfcpp::Rel<32, big_endian>& reloc, unsigned int r_type, | |
216 | Symbol* gsym); | |
217 | ||
218 | private: | |
219 | static void | |
220 | unsupported_reloc_local(Sized_relobj<32, big_endian>*, | |
221 | unsigned int r_type); | |
222 | ||
223 | static void | |
224 | unsupported_reloc_global(Sized_relobj<32, big_endian>*, | |
225 | unsigned int r_type, Symbol*); | |
226 | }; | |
227 | ||
228 | // The class which implements relocation. | |
229 | class Relocate | |
230 | { | |
231 | public: | |
232 | Relocate() | |
233 | { } | |
234 | ||
235 | ~Relocate() | |
236 | { } | |
237 | ||
238 | // Do a relocation. Return false if the caller should not issue | |
239 | // any warnings about this relocation. | |
240 | inline bool | |
241 | relocate(const Relocate_info<32, big_endian>*, Target_arm*, | |
242 | Output_section*, size_t relnum, | |
243 | const elfcpp::Rel<32, big_endian>&, | |
244 | unsigned int r_type, const Sized_symbol<32>*, | |
245 | const Symbol_value<32>*, | |
246 | unsigned char*, elfcpp::Elf_types<32>::Elf_Addr, | |
247 | section_size_type); | |
248 | }; | |
249 | ||
250 | // A class which returns the size required for a relocation type, | |
251 | // used while scanning relocs during a relocatable link. | |
252 | class Relocatable_size_for_reloc | |
253 | { | |
254 | public: | |
255 | unsigned int | |
256 | get_size_for_reloc(unsigned int, Relobj*); | |
257 | }; | |
258 | ||
259 | // Information about this specific target which we pass to the | |
260 | // general Target structure. | |
261 | static const Target::Target_info arm_info; | |
262 | }; | |
263 | ||
264 | template<bool big_endian> | |
265 | const Target::Target_info Target_arm<big_endian>::arm_info = | |
266 | { | |
267 | 32, // size | |
268 | big_endian, // is_big_endian | |
269 | elfcpp::EM_ARM, // machine_code | |
270 | false, // has_make_symbol | |
271 | false, // has_resolve | |
272 | false, // has_code_fill | |
273 | true, // is_default_stack_executable | |
274 | '\0', // wrap_char | |
275 | "/usr/lib/libc.so.1", // dynamic_linker | |
276 | 0x8000, // default_text_segment_address | |
277 | 0x1000, // abi_pagesize (overridable by -z max-page-size) | |
278 | 0x1000 // common_pagesize (overridable by -z common-page-size) | |
279 | }; | |
280 | ||
281 | // Report an unsupported relocation against a local symbol. | |
282 | ||
283 | template<bool big_endian> | |
284 | void | |
285 | Target_arm<big_endian>::Scan::unsupported_reloc_local( | |
286 | Sized_relobj<32, big_endian>* object, | |
287 | unsigned int r_type) | |
288 | { | |
289 | gold_error(_("%s: unsupported reloc %u against local symbol"), | |
290 | object->name().c_str(), r_type); | |
291 | } | |
292 | ||
293 | // Scan a relocation for a local symbol. | |
294 | ||
295 | template<bool big_endian> | |
296 | inline void | |
297 | Target_arm<big_endian>::Scan::local(const General_options&, | |
298 | Symbol_table* /* symtab */, | |
299 | Layout* /* layout */, | |
300 | Target_arm* /* target */, | |
301 | Sized_relobj<32, big_endian>* object, | |
302 | unsigned int /* data_shndx */, | |
303 | Output_section* /* output_section */, | |
304 | const elfcpp::Rel<32, big_endian>& /* reloc */, | |
305 | unsigned int r_type, | |
306 | const elfcpp::Sym<32, big_endian>&) | |
307 | { | |
308 | r_type = get_real_reloc_type(r_type); | |
309 | switch (r_type) | |
310 | { | |
311 | case elfcpp::R_ARM_NONE: | |
312 | break; | |
313 | ||
314 | default: | |
315 | unsupported_reloc_local(object, r_type); | |
316 | break; | |
317 | } | |
318 | } | |
319 | ||
320 | // Report an unsupported relocation against a global symbol. | |
321 | ||
322 | template<bool big_endian> | |
323 | void | |
324 | Target_arm<big_endian>::Scan::unsupported_reloc_global( | |
325 | Sized_relobj<32, big_endian>* object, | |
326 | unsigned int r_type, | |
327 | Symbol* gsym) | |
328 | { | |
329 | gold_error(_("%s: unsupported reloc %u against global symbol %s"), | |
330 | object->name().c_str(), r_type, gsym->demangled_name().c_str()); | |
331 | } | |
332 | ||
333 | // Scan a relocation for a global symbol. | |
334 | ||
335 | template<bool big_endian> | |
336 | inline void | |
337 | Target_arm<big_endian>::Scan::global(const General_options&, | |
338 | Symbol_table* /* symtab */, | |
339 | Layout* /* layout */, | |
340 | Target_arm* /* target */, | |
341 | Sized_relobj<32, big_endian>* object, | |
342 | unsigned int /* data_shndx */, | |
343 | Output_section* /* output_section */, | |
344 | const elfcpp::Rel<32, big_endian>& /* reloc */, | |
345 | unsigned int r_type, | |
346 | Symbol* gsym) | |
347 | { | |
348 | r_type = get_real_reloc_type(r_type); | |
349 | switch (r_type) | |
350 | { | |
351 | case elfcpp::R_ARM_NONE: | |
352 | break; | |
353 | ||
354 | default: | |
355 | unsupported_reloc_global(object, r_type, gsym); | |
356 | break; | |
357 | } | |
358 | } | |
359 | ||
360 | // Process relocations for gc. | |
361 | ||
362 | template<bool big_endian> | |
363 | void | |
364 | Target_arm<big_endian>::gc_process_relocs(const General_options& options, | |
365 | Symbol_table* symtab, | |
366 | Layout* layout, | |
367 | Sized_relobj<32, big_endian>* object, | |
368 | unsigned int data_shndx, | |
369 | unsigned int, | |
370 | const unsigned char* prelocs, | |
371 | size_t reloc_count, | |
372 | Output_section* output_section, | |
373 | bool needs_special_offset_handling, | |
374 | size_t local_symbol_count, | |
375 | const unsigned char* plocal_symbols) | |
376 | { | |
377 | typedef Target_arm<big_endian> Arm; | |
378 | typedef typename Target_arm<big_endian>::Scan Scan; | |
379 | ||
380 | gold::gc_process_relocs<32, big_endian, Arm, elfcpp::SHT_REL, Scan>( | |
381 | options, | |
382 | symtab, | |
383 | layout, | |
384 | this, | |
385 | object, | |
386 | data_shndx, | |
387 | prelocs, | |
388 | reloc_count, | |
389 | output_section, | |
390 | needs_special_offset_handling, | |
391 | local_symbol_count, | |
392 | plocal_symbols); | |
393 | } | |
394 | ||
395 | // Scan relocations for a section. | |
396 | ||
397 | template<bool big_endian> | |
398 | void | |
399 | Target_arm<big_endian>::scan_relocs(const General_options& options, | |
400 | Symbol_table* symtab, | |
401 | Layout* layout, | |
402 | Sized_relobj<32, big_endian>* object, | |
403 | unsigned int data_shndx, | |
404 | unsigned int sh_type, | |
405 | const unsigned char* prelocs, | |
406 | size_t reloc_count, | |
407 | Output_section* output_section, | |
408 | bool needs_special_offset_handling, | |
409 | size_t local_symbol_count, | |
410 | const unsigned char* plocal_symbols) | |
411 | { | |
412 | typedef typename Target_arm<big_endian>::Scan Scan; | |
413 | if (sh_type == elfcpp::SHT_RELA) | |
414 | { | |
415 | gold_error(_("%s: unsupported RELA reloc section"), | |
416 | object->name().c_str()); | |
417 | return; | |
418 | } | |
419 | ||
420 | gold::scan_relocs<32, big_endian, Target_arm, elfcpp::SHT_REL, Scan>( | |
421 | options, | |
422 | symtab, | |
423 | layout, | |
424 | this, | |
425 | object, | |
426 | data_shndx, | |
427 | prelocs, | |
428 | reloc_count, | |
429 | output_section, | |
430 | needs_special_offset_handling, | |
431 | local_symbol_count, | |
432 | plocal_symbols); | |
433 | } | |
434 | ||
435 | // Finalize the sections. | |
436 | ||
437 | template<bool big_endian> | |
438 | void | |
439 | Target_arm<big_endian>::do_finalize_sections(Layout* /* layout */) | |
440 | { | |
441 | gold_unreachable (); | |
442 | } | |
443 | ||
444 | // Perform a relocation. | |
445 | ||
446 | template<bool big_endian> | |
447 | inline bool | |
448 | Target_arm<big_endian>::Relocate::relocate( | |
449 | const Relocate_info<32, big_endian>* /* relinfo */, | |
450 | Target_arm* /* target */, | |
451 | Output_section* /* output_section */, | |
452 | size_t /* relnum */, | |
453 | const elfcpp::Rel<32, big_endian>& /* rel */, | |
454 | unsigned int r_type, | |
455 | const Sized_symbol<32>* /* gsym */, | |
456 | const Symbol_value<32>* /* psymval */, | |
457 | unsigned char* /* view */, | |
458 | elfcpp::Elf_types<32>::Elf_Addr /* address */, | |
459 | section_size_type /* view_size */ ) | |
460 | { | |
461 | switch (r_type) | |
462 | { | |
463 | case elfcpp::R_ARM_NONE: | |
464 | break; | |
465 | ||
466 | default: | |
467 | gold_unreachable(); | |
468 | } | |
469 | ||
470 | return true; | |
471 | } | |
472 | ||
473 | // Relocate section data. | |
474 | ||
475 | template<bool big_endian> | |
476 | void | |
477 | Target_arm<big_endian>::relocate_section( | |
478 | const Relocate_info<32, big_endian>* relinfo, | |
479 | unsigned int sh_type, | |
480 | const unsigned char* prelocs, | |
481 | size_t reloc_count, | |
482 | Output_section* output_section, | |
483 | bool needs_special_offset_handling, | |
484 | unsigned char* view, | |
485 | elfcpp::Elf_types<32>::Elf_Addr address, | |
486 | section_size_type view_size) | |
487 | { | |
488 | typedef typename Target_arm<big_endian>::Relocate Arm_relocate; | |
489 | gold_assert(sh_type == elfcpp::SHT_REL); | |
490 | ||
491 | gold::relocate_section<32, big_endian, Target_arm, elfcpp::SHT_REL, | |
492 | Arm_relocate>( | |
493 | relinfo, | |
494 | this, | |
495 | prelocs, | |
496 | reloc_count, | |
497 | output_section, | |
498 | needs_special_offset_handling, | |
499 | view, | |
500 | address, | |
501 | view_size); | |
502 | } | |
503 | ||
504 | // Return the size of a relocation while scanning during a relocatable | |
505 | // link. | |
506 | ||
507 | template<bool big_endian> | |
508 | unsigned int | |
509 | Target_arm<big_endian>::Relocatable_size_for_reloc::get_size_for_reloc( | |
510 | unsigned int r_type, | |
511 | Relobj* object) | |
512 | { | |
513 | r_type = get_real_reloc_type(r_type); | |
514 | switch (r_type) | |
515 | { | |
516 | case elfcpp::R_ARM_NONE: | |
517 | return 0; | |
518 | ||
519 | case elfcpp::R_ARM_ABS32: | |
520 | case elfcpp::R_ARM_REL32: | |
521 | case elfcpp::R_ARM_THM_CALL: | |
522 | case elfcpp::R_ARM_GOTOFF32: | |
523 | case elfcpp::R_ARM_BASE_PREL: | |
524 | case elfcpp::R_ARM_GOT_BREL: | |
525 | case elfcpp::R_ARM_PLT32: | |
526 | case elfcpp::R_ARM_CALL: | |
527 | case elfcpp::R_ARM_JUMP24: | |
528 | case elfcpp::R_ARM_PREL31: | |
529 | return 4; | |
530 | ||
531 | case elfcpp::R_ARM_TARGET1: | |
532 | // This should have been mapped to another type already. | |
533 | // Fall through. | |
534 | case elfcpp::R_ARM_COPY: | |
535 | case elfcpp::R_ARM_GLOB_DAT: | |
536 | case elfcpp::R_ARM_JUMP_SLOT: | |
537 | case elfcpp::R_ARM_RELATIVE: | |
538 | // These are relocations which should only be seen by the | |
539 | // dynamic linker, and should never be seen here. | |
540 | gold_error(_("%s: unexpected reloc %u in object file"), | |
541 | object->name().c_str(), r_type); | |
542 | return 0; | |
543 | ||
544 | default: | |
545 | object->error(_("unsupported reloc %u in object file"), r_type); | |
546 | return 0; | |
547 | } | |
548 | } | |
549 | ||
550 | // Scan the relocs during a relocatable link. | |
551 | ||
552 | template<bool big_endian> | |
553 | void | |
554 | Target_arm<big_endian>::scan_relocatable_relocs( | |
555 | const General_options& options, | |
556 | Symbol_table* symtab, | |
557 | Layout* layout, | |
558 | Sized_relobj<32, big_endian>* object, | |
559 | unsigned int data_shndx, | |
560 | unsigned int sh_type, | |
561 | const unsigned char* prelocs, | |
562 | size_t reloc_count, | |
563 | Output_section* output_section, | |
564 | bool needs_special_offset_handling, | |
565 | size_t local_symbol_count, | |
566 | const unsigned char* plocal_symbols, | |
567 | Relocatable_relocs* rr) | |
568 | { | |
569 | gold_assert(sh_type == elfcpp::SHT_REL); | |
570 | ||
571 | typedef gold::Default_scan_relocatable_relocs<elfcpp::SHT_REL, | |
572 | Relocatable_size_for_reloc> Scan_relocatable_relocs; | |
573 | ||
574 | gold::scan_relocatable_relocs<32, big_endian, elfcpp::SHT_REL, | |
575 | Scan_relocatable_relocs>( | |
576 | options, | |
577 | symtab, | |
578 | layout, | |
579 | object, | |
580 | data_shndx, | |
581 | prelocs, | |
582 | reloc_count, | |
583 | output_section, | |
584 | needs_special_offset_handling, | |
585 | local_symbol_count, | |
586 | plocal_symbols, | |
587 | rr); | |
588 | } | |
589 | ||
590 | // Relocate a section during a relocatable link. | |
591 | ||
592 | template<bool big_endian> | |
593 | void | |
594 | Target_arm<big_endian>::relocate_for_relocatable( | |
595 | const Relocate_info<32, big_endian>* relinfo, | |
596 | unsigned int sh_type, | |
597 | const unsigned char* prelocs, | |
598 | size_t reloc_count, | |
599 | Output_section* output_section, | |
600 | off_t offset_in_output_section, | |
601 | const Relocatable_relocs* rr, | |
602 | unsigned char* view, | |
603 | elfcpp::Elf_types<32>::Elf_Addr view_address, | |
604 | section_size_type view_size, | |
605 | unsigned char* reloc_view, | |
606 | section_size_type reloc_view_size) | |
607 | { | |
608 | gold_assert(sh_type == elfcpp::SHT_REL); | |
609 | ||
610 | gold::relocate_for_relocatable<32, big_endian, elfcpp::SHT_REL>( | |
611 | relinfo, | |
612 | prelocs, | |
613 | reloc_count, | |
614 | output_section, | |
615 | offset_in_output_section, | |
616 | rr, | |
617 | view, | |
618 | view_address, | |
619 | view_size, | |
620 | reloc_view, | |
621 | reloc_view_size); | |
622 | } | |
623 | ||
624 | template<bool big_endian> | |
625 | uint64_t | |
626 | Target_arm<big_endian>::do_dynsym_value(const Symbol* /*gsym*/) const | |
627 | { | |
628 | gold_unreachable (); | |
629 | return 0; | |
630 | } | |
631 | ||
632 | // Map platform-specific relocs to real relocs | |
633 | // | |
634 | template<bool big_endian> | |
635 | unsigned int | |
636 | Target_arm<big_endian>::get_real_reloc_type (unsigned int r_type) | |
637 | { | |
638 | switch (r_type) | |
639 | { | |
640 | case elfcpp::R_ARM_TARGET1: | |
641 | // This is either R_ARM_ABS32 or R_ARM_REL32; | |
642 | return elfcpp::R_ARM_ABS32; | |
643 | ||
644 | case elfcpp::R_ARM_TARGET2: | |
645 | // This can be any reloc type but ususally is R_ARM_GOT_PREL | |
646 | return elfcpp::R_ARM_GOT_PREL; | |
647 | ||
648 | default: | |
649 | return r_type; | |
650 | } | |
651 | } | |
652 | ||
653 | // The selector for arm object files. | |
654 | ||
655 | template<bool big_endian> | |
656 | class Target_selector_arm : public Target_selector | |
657 | { | |
658 | public: | |
659 | Target_selector_arm() | |
660 | : Target_selector(elfcpp::EM_ARM, 32, big_endian, | |
661 | (big_endian ? "elf32-bigarm" : "elf32-littlearm")) | |
662 | { } | |
663 | ||
664 | Target* | |
665 | do_instantiate_target() | |
666 | { return new Target_arm<big_endian>(); } | |
667 | }; | |
668 | ||
669 | Target_selector_arm<false> target_selector_arm; | |
670 | Target_selector_arm<true> target_selector_armbe; | |
671 | ||
672 | } // End anonymous namespace. |