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2010-06-16 Vincent Rivire <vincent.riviere@freesbee.fr>
[binutils.git] / gold / sparc.cc
blobe2d59b943a47fd99995b8e11fdfe71334c23cf87
1 // sparc.cc -- sparc target support for gold.
2
3 // Copyright 2008, 2009 Free Software Foundation, Inc.
4 // Written by David S. Miller <davem@davemloft.net>.
5
6 // This file is part of gold.
7
8 // This program is free software; you can redistribute it and/or modify
9 // it under the terms of the GNU General Public License as published by
10 // the Free Software Foundation; either version 3 of the License, or
11 // (at your option) any later version.
12
13 // This program is distributed in the hope that it will be useful,
14 // but WITHOUT ANY WARRANTY; without even the implied warranty of
15 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 // GNU General Public License for more details.
17
18 // You should have received a copy of the GNU General Public License
19 // along with this program; if not, write to the Free Software
20 // Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston,
21 // MA 02110-1301, USA.
22
23 #include "gold.h"
24
25 #include <cstdlib>
26 #include <cstdio>
27 #include <cstring>
28
29 #include "elfcpp.h"
30 #include "parameters.h"
31 #include "reloc.h"
32 #include "sparc.h"
33 #include "object.h"
34 #include "symtab.h"
35 #include "layout.h"
36 #include "output.h"
37 #include "copy-relocs.h"
38 #include "target.h"
39 #include "target-reloc.h"
40 #include "target-select.h"
41 #include "tls.h"
42 #include "errors.h"
43 #include "gc.h"
44
45 namespace
46 {
47
48 using namespace gold;
49
50 template<int size, bool big_endian>
51 class Output_data_plt_sparc;
52
53 template<int size, bool big_endian>
54 class Target_sparc : public Sized_target<size, big_endian>
55 {
56 public:
57 typedef Output_data_reloc<elfcpp::SHT_RELA, true, size, big_endian> Reloc_section;
58
59 Target_sparc()
60 : Sized_target<size, big_endian>(&sparc_info),
61 got_(NULL), plt_(NULL), rela_dyn_(NULL),
62 copy_relocs_(elfcpp::R_SPARC_COPY), dynbss_(NULL),
63 got_mod_index_offset_(-1U), tls_get_addr_sym_(NULL)
64 {
65 }
66
67 // Process the relocations to determine unreferenced sections for
68 // garbage collection.
69 void
70 gc_process_relocs(Symbol_table* symtab,
71 Layout* layout,
72 Sized_relobj<size, big_endian>* object,
73 unsigned int data_shndx,
74 unsigned int sh_type,
75 const unsigned char* prelocs,
76 size_t reloc_count,
77 Output_section* output_section,
78 bool needs_special_offset_handling,
79 size_t local_symbol_count,
80 const unsigned char* plocal_symbols);
81
82 // Scan the relocations to look for symbol adjustments.
83 void
84 scan_relocs(Symbol_table* symtab,
85 Layout* layout,
86 Sized_relobj<size, big_endian>* object,
87 unsigned int data_shndx,
88 unsigned int sh_type,
89 const unsigned char* prelocs,
90 size_t reloc_count,
91 Output_section* output_section,
92 bool needs_special_offset_handling,
93 size_t local_symbol_count,
94 const unsigned char* plocal_symbols);
95 // Finalize the sections.
96 void
97 do_finalize_sections(Layout*, const Input_objects*, Symbol_table*);
98
99 // Return the value to use for a dynamic which requires special
100 // treatment.
101 uint64_t
102 do_dynsym_value(const Symbol*) const;
103
104 // Relocate a section.
105 void
106 relocate_section(const Relocate_info<size, big_endian>*,
107 unsigned int sh_type,
108 const unsigned char* prelocs,
109 size_t reloc_count,
110 Output_section* output_section,
111 bool needs_special_offset_handling,
112 unsigned char* view,
113 typename elfcpp::Elf_types<size>::Elf_Addr view_address,
114 section_size_type view_size,
115 const Reloc_symbol_changes*);
116
117 // Scan the relocs during a relocatable link.
118 void
119 scan_relocatable_relocs(Symbol_table* symtab,
120 Layout* layout,
121 Sized_relobj<size, 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 Relocatable_relocs*);
131
132 // Relocate a section during a relocatable link.
133 void
134 relocate_for_relocatable(const Relocate_info<size, big_endian>*,
135 unsigned int sh_type,
136 const unsigned char* prelocs,
137 size_t reloc_count,
138 Output_section* output_section,
139 off_t offset_in_output_section,
140 const Relocatable_relocs*,
141 unsigned char* view,
142 typename elfcpp::Elf_types<size>::Elf_Addr view_address,
143 section_size_type view_size,
144 unsigned char* reloc_view,
145 section_size_type reloc_view_size);
146 // Return whether SYM is defined by the ABI.
147 bool
148 do_is_defined_by_abi(const Symbol* sym) const
149 {
150 // XXX Really need to support this better...
151 if (sym->type() == elfcpp::STT_SPARC_REGISTER)
152 return 1;
153
154 return strcmp(sym->name(), "___tls_get_addr") == 0;
155 }
156
157 // Return whether there is a GOT section.
158 bool
159 has_got_section() const
160 { return this->got_ != NULL; }
161
162 // Return the size of the GOT section.
163 section_size_type
164 got_size()
165 {
166 gold_assert(this->got_ != NULL);
167 return this->got_->data_size();
168 }
169
170 private:
171
172 // The class which scans relocations.
173 class Scan
174 {
175 public:
176 Scan()
177 : issued_non_pic_error_(false)
178 { }
179
180 inline void
181 local(Symbol_table* symtab, Layout* layout, Target_sparc* target,
182 Sized_relobj<size, big_endian>* object,
183 unsigned int data_shndx,
184 Output_section* output_section,
185 const elfcpp::Rela<size, big_endian>& reloc, unsigned int r_type,
186 const elfcpp::Sym<size, big_endian>& lsym);
187
188 inline void
189 global(Symbol_table* symtab, Layout* layout, Target_sparc* target,
190 Sized_relobj<size, big_endian>* object,
191 unsigned int data_shndx,
192 Output_section* output_section,
193 const elfcpp::Rela<size, big_endian>& reloc, unsigned int r_type,
194 Symbol* gsym);
195
196 inline bool
197 local_reloc_may_be_function_pointer(Symbol_table* , Layout* ,
198 Target_sparc* ,
199 Sized_relobj<size, big_endian>* ,
200 unsigned int ,
201 Output_section* ,
202 const elfcpp::Rela<size, big_endian>& ,
203 unsigned int ,
204 const elfcpp::Sym<size, big_endian>&)
205 { return false; }
206
207 inline bool
208 global_reloc_may_be_function_pointer(Symbol_table* , Layout* ,
209 Target_sparc* ,
210 Sized_relobj<size, big_endian>* ,
211 unsigned int ,
212 Output_section* ,
213 const elfcpp::Rela<size,
214 big_endian>& ,
215 unsigned int , Symbol*)
216 { return false; }
217
218
219 private:
220 static void
221 unsupported_reloc_local(Sized_relobj<size, big_endian>*,
222 unsigned int r_type);
223
224 static void
225 unsupported_reloc_global(Sized_relobj<size, big_endian>*,
226 unsigned int r_type, Symbol*);
227
228 static void
229 generate_tls_call(Symbol_table* symtab, Layout* layout,
230 Target_sparc* target);
231
232 void
233 check_non_pic(Relobj*, unsigned int r_type);
234
235 // Whether we have issued an error about a non-PIC compilation.
236 bool issued_non_pic_error_;
237 };
238
239 // The class which implements relocation.
240 class Relocate
241 {
242 public:
243 Relocate()
244 : ignore_gd_add_(false)
245 { }
246
247 ~Relocate()
248 {
249 if (this->ignore_gd_add_)
250 {
251 // FIXME: This needs to specify the location somehow.
252 gold_error(_("missing expected TLS relocation"));
253 }
254 }
255
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_sparc*,
260 Output_section*, size_t relnum,
261 const elfcpp::Rela<size, big_endian>&,
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>*, Target_sparc* target,
272 size_t relnum, const elfcpp::Rela<size, big_endian>&,
273 unsigned int r_type, const Sized_symbol<size>*,
274 const Symbol_value<size>*,
275 unsigned char*,
276 typename elfcpp::Elf_types<size>::Elf_Addr,
277 section_size_type);
278
279 // Ignore the next relocation which should be R_SPARC_TLS_GD_ADD
280 bool ignore_gd_add_;
281 };
282
283 // A class which returns the size required for a relocation type,
284 // used while scanning relocs during a relocatable link.
285 class Relocatable_size_for_reloc
286 {
287 public:
288 unsigned int
289 get_size_for_reloc(unsigned int, Relobj*);
290 };
291
292 // Get the GOT section, creating it if necessary.
293 Output_data_got<size, big_endian>*
294 got_section(Symbol_table*, Layout*);
295
296 // Create a PLT entry for a global symbol.
297 void
298 make_plt_entry(Symbol_table*, Layout*, Symbol*);
299
300 // Create a GOT entry for the TLS module index.
301 unsigned int
302 got_mod_index_entry(Symbol_table* symtab, Layout* layout,
303 Sized_relobj<size, big_endian>* object);
304
305 // Return the gsym for "__tls_get_addr". Cache if not already
306 // cached.
307 Symbol*
308 tls_get_addr_sym(Symbol_table* symtab)
309 {
310 if (!this->tls_get_addr_sym_)
311 this->tls_get_addr_sym_ = symtab->lookup("__tls_get_addr", NULL);
312 gold_assert(this->tls_get_addr_sym_);
313 return this->tls_get_addr_sym_;
314 }
315
316 // Get the PLT section.
317 const Output_data_plt_sparc<size, big_endian>*
318 plt_section() const
319 {
320 gold_assert(this->plt_ != NULL);
321 return this->plt_;
322 }
323
324 // Get the dynamic reloc section, creating it if necessary.
325 Reloc_section*
326 rela_dyn_section(Layout*);
327
328 // Copy a relocation against a global symbol.
329 void
330 copy_reloc(Symbol_table* symtab, Layout* layout,
331 Sized_relobj<size, big_endian>* object,
332 unsigned int shndx, Output_section* output_section,
333 Symbol* sym, const elfcpp::Rela<size, big_endian>& reloc)
334 {
335 this->copy_relocs_.copy_reloc(symtab, layout,
336 symtab->get_sized_symbol<size>(sym),
337 object, shndx, output_section,
338 reloc, this->rela_dyn_section(layout));
339 }
340
341 // Information about this specific target which we pass to the
342 // general Target structure.
343 static Target::Target_info sparc_info;
344
345 // The types of GOT entries needed for this platform.
346 enum Got_type
347 {
348 GOT_TYPE_STANDARD = 0, // GOT entry for a regular symbol
349 GOT_TYPE_TLS_OFFSET = 1, // GOT entry for TLS offset
350 GOT_TYPE_TLS_PAIR = 2, // GOT entry for TLS module/offset pair
351 };
352
353 // The GOT section.
354 Output_data_got<size, big_endian>* got_;
355 // The PLT section.
356 Output_data_plt_sparc<size, big_endian>* plt_;
357 // The dynamic reloc section.
358 Reloc_section* rela_dyn_;
359 // Relocs saved to avoid a COPY reloc.
360 Copy_relocs<elfcpp::SHT_RELA, size, big_endian> copy_relocs_;
361 // Space for variables copied with a COPY reloc.
362 Output_data_space* dynbss_;
363 // Offset of the GOT entry for the TLS module index;
364 unsigned int got_mod_index_offset_;
365 // Cached pointer to __tls_get_addr symbol
366 Symbol* tls_get_addr_sym_;
367 };
368
369 template<>
370 Target::Target_info Target_sparc<32, true>::sparc_info =
371 {
372 32, // size
373 true, // is_big_endian
374 elfcpp::EM_SPARC, // machine_code
375 false, // has_make_symbol
376 false, // has_resolve
377 false, // has_code_fill
378 true, // is_default_stack_executable
379 '\0', // wrap_char
380 "/usr/lib/ld.so.1", // dynamic_linker
381 0x00010000, // default_text_segment_address
382 64 * 1024, // abi_pagesize (overridable by -z max-page-size)
383 8 * 1024, // common_pagesize (overridable by -z common-page-size)
384 elfcpp::SHN_UNDEF, // small_common_shndx
385 elfcpp::SHN_UNDEF, // large_common_shndx
386 0, // small_common_section_flags
387 0, // large_common_section_flags
388 NULL, // attributes_section
389 NULL // attributes_vendor
390 };
391
392 template<>
393 Target::Target_info Target_sparc<64, true>::sparc_info =
394 {
395 64, // size
396 true, // is_big_endian
397 elfcpp::EM_SPARCV9, // machine_code
398 false, // has_make_symbol
399 false, // has_resolve
400 false, // has_code_fill
401 true, // is_default_stack_executable
402 '\0', // wrap_char
403 "/usr/lib/sparcv9/ld.so.1", // dynamic_linker
404 0x100000, // default_text_segment_address
405 64 * 1024, // abi_pagesize (overridable by -z max-page-size)
406 8 * 1024, // common_pagesize (overridable by -z common-page-size)
407 elfcpp::SHN_UNDEF, // small_common_shndx
408 elfcpp::SHN_UNDEF, // large_common_shndx
409 0, // small_common_section_flags
410 0, // large_common_section_flags
411 NULL, // attributes_section
412 NULL // attributes_vendor
413 };
414
415 // We have to take care here, even when operating in little-endian
416 // mode, sparc instructions are still big endian.
417 template<int size, bool big_endian>
418 class Sparc_relocate_functions
419 {
420 private:
421 // Do a simple relocation with the addend in the relocation.
422 template<int valsize>
423 static inline void
424 rela(unsigned char* view,
425 unsigned int right_shift,
426 typename elfcpp::Elf_types<valsize>::Elf_Addr dst_mask,
427 typename elfcpp::Swap<size, big_endian>::Valtype value,
428 typename elfcpp::Swap<size, big_endian>::Valtype addend)
429 {
430 typedef typename elfcpp::Swap<valsize, big_endian>::Valtype Valtype;
431 Valtype* wv = reinterpret_cast<Valtype*>(view);
432 Valtype val = elfcpp::Swap<valsize, big_endian>::readval(wv);
433 Valtype reloc = ((value + addend) >> right_shift);
434
435 val &= ~dst_mask;
436 reloc &= dst_mask;
437
438 elfcpp::Swap<valsize, big_endian>::writeval(wv, val | reloc);
439 }
440
441 // Do a simple relocation using a symbol value with the addend in
442 // the relocation.
443 template<int valsize>
444 static inline void
445 rela(unsigned char* view,
446 unsigned int right_shift,
447 typename elfcpp::Elf_types<valsize>::Elf_Addr dst_mask,
448 const Sized_relobj<size, big_endian>* object,
449 const Symbol_value<size>* psymval,
450 typename elfcpp::Swap<valsize, big_endian>::Valtype addend)
451 {
452 typedef typename elfcpp::Swap<valsize, big_endian>::Valtype Valtype;
453 Valtype* wv = reinterpret_cast<Valtype*>(view);
454 Valtype val = elfcpp::Swap<valsize, big_endian>::readval(wv);
455 Valtype reloc = (psymval->value(object, addend) >> right_shift);
456
457 val &= ~dst_mask;
458 reloc &= dst_mask;
459
460 elfcpp::Swap<valsize, big_endian>::writeval(wv, val | reloc);
461 }
462
463 // Do a simple relocation using a symbol value with the addend in
464 // the relocation, unaligned.
465 template<int valsize>
466 static inline void
467 rela_ua(unsigned char* view,
468 unsigned int right_shift, elfcpp::Elf_Xword dst_mask,
469 const Sized_relobj<size, big_endian>* object,
470 const Symbol_value<size>* psymval,
471 typename elfcpp::Swap<size, big_endian>::Valtype addend)
472 {
473 typedef typename elfcpp::Swap_unaligned<valsize,
474 big_endian>::Valtype Valtype;
475 unsigned char* wv = view;
476 Valtype val = elfcpp::Swap_unaligned<valsize, big_endian>::readval(wv);
477 Valtype reloc = (psymval->value(object, addend) >> right_shift);
478
479 val &= ~dst_mask;
480 reloc &= dst_mask;
481
482 elfcpp::Swap_unaligned<valsize, big_endian>::writeval(wv, val | reloc);
483 }
484
485 // Do a simple PC relative relocation with a Symbol_value with the
486 // addend in the relocation.
487 template<int valsize>
488 static inline void
489 pcrela(unsigned char* view,
490 unsigned int right_shift,
491 typename elfcpp::Elf_types<valsize>::Elf_Addr dst_mask,
492 const Sized_relobj<size, big_endian>* object,
493 const Symbol_value<size>* psymval,
494 typename elfcpp::Swap<size, big_endian>::Valtype addend,
495 typename elfcpp::Elf_types<size>::Elf_Addr address)
496 {
497 typedef typename elfcpp::Swap<valsize, big_endian>::Valtype Valtype;
498 Valtype* wv = reinterpret_cast<Valtype*>(view);
499 Valtype val = elfcpp::Swap<valsize, big_endian>::readval(wv);
500 Valtype reloc = ((psymval->value(object, addend) - address)
501 >> right_shift);
502
503 val &= ~dst_mask;
504 reloc &= dst_mask;
505
506 elfcpp::Swap<valsize, big_endian>::writeval(wv, val | reloc);
507 }
508
509 template<int valsize>
510 static inline void
511 pcrela_unaligned(unsigned char* view,
512 const Sized_relobj<size, big_endian>* object,
513 const Symbol_value<size>* psymval,
514 typename elfcpp::Swap<size, big_endian>::Valtype addend,
515 typename elfcpp::Elf_types<size>::Elf_Addr address)
516 {
517 typedef typename elfcpp::Swap_unaligned<valsize,
518 big_endian>::Valtype Valtype;
519 unsigned char* wv = view;
520 Valtype reloc = (psymval->value(object, addend) - address);
521
522 elfcpp::Swap_unaligned<valsize, big_endian>::writeval(wv, reloc);
523 }
524
525 typedef Sparc_relocate_functions<size, big_endian> This;
526 typedef Sparc_relocate_functions<size, true> This_insn;
527
528 public:
529 // R_SPARC_WDISP30: (Symbol + Addend - Address) >> 2
530 static inline void
531 wdisp30(unsigned char* view,
532 const Sized_relobj<size, big_endian>* object,
533 const Symbol_value<size>* psymval,
534 typename elfcpp::Elf_types<size>::Elf_Addr addend,
535 typename elfcpp::Elf_types<size>::Elf_Addr address)
536 {
537 This_insn::template pcrela<32>(view, 2, 0x3fffffff, object,
538 psymval, addend, address);
539 }
540
541 // R_SPARC_WDISP22: (Symbol + Addend - Address) >> 2
542 static inline void
543 wdisp22(unsigned char* view,
544 const Sized_relobj<size, big_endian>* object,
545 const Symbol_value<size>* psymval,
546 typename elfcpp::Elf_types<size>::Elf_Addr addend,
547 typename elfcpp::Elf_types<size>::Elf_Addr address)
548 {
549 This_insn::template pcrela<32>(view, 2, 0x003fffff, object,
550 psymval, addend, address);
551 }
552
553 // R_SPARC_WDISP19: (Symbol + Addend - Address) >> 2
554 static inline void
555 wdisp19(unsigned char* view,
556 const Sized_relobj<size, big_endian>* object,
557 const Symbol_value<size>* psymval,
558 typename elfcpp::Elf_types<size>::Elf_Addr addend,
559 typename elfcpp::Elf_types<size>::Elf_Addr address)
560 {
561 This_insn::template pcrela<32>(view, 2, 0x0007ffff, object,
562 psymval, addend, address);
563 }
564
565 // R_SPARC_WDISP16: (Symbol + Addend - Address) >> 2
566 static inline void
567 wdisp16(unsigned char* view,
568 const Sized_relobj<size, big_endian>* object,
569 const Symbol_value<size>* psymval,
570 typename elfcpp::Elf_types<size>::Elf_Addr addend,
571 typename elfcpp::Elf_types<size>::Elf_Addr address)
572 {
573 typedef typename elfcpp::Swap<32, true>::Valtype Valtype;
574 Valtype* wv = reinterpret_cast<Valtype*>(view);
575 Valtype val = elfcpp::Swap<32, true>::readval(wv);
576 Valtype reloc = ((psymval->value(object, addend) - address)
577 >> 2);
578
579 // The relocation value is split between the low 14 bits,
580 // and bits 20-21.
581 val &= ~((0x3 << 20) | 0x3fff);
582 reloc = (((reloc & 0xc000) << (20 - 14))
583 | (reloc & 0x3ffff));
584
585 elfcpp::Swap<32, true>::writeval(wv, val | reloc);
586 }
587
588 // R_SPARC_PC22: (Symbol + Addend - Address) >> 10
589 static inline void
590 pc22(unsigned char* view,
591 const Sized_relobj<size, big_endian>* object,
592 const Symbol_value<size>* psymval,
593 typename elfcpp::Elf_types<size>::Elf_Addr addend,
594 typename elfcpp::Elf_types<size>::Elf_Addr address)
595 {
596 This_insn::template pcrela<32>(view, 10, 0x003fffff, object,
597 psymval, addend, address);
598 }
599
600 // R_SPARC_PC10: (Symbol + Addend - Address) & 0x3ff
601 static inline void
602 pc10(unsigned char* view,
603 const Sized_relobj<size, big_endian>* object,
604 const Symbol_value<size>* psymval,
605 typename elfcpp::Elf_types<size>::Elf_Addr addend,
606 typename elfcpp::Elf_types<size>::Elf_Addr address)
607 {
608 This_insn::template pcrela<32>(view, 0, 0x000003ff, object,
609 psymval, addend, address);
610 }
611
612 // R_SPARC_HI22: (Symbol + Addend) >> 10
613 static inline void
614 hi22(unsigned char* view,
615 typename elfcpp::Elf_types<size>::Elf_Addr value,
616 typename elfcpp::Elf_types<size>::Elf_Addr addend)
617 {
618 This_insn::template rela<32>(view, 10, 0x003fffff, value, addend);
619 }
620
621 // R_SPARC_HI22: (Symbol + Addend) >> 10
622 static inline void
623 hi22(unsigned char* view,
624 const Sized_relobj<size, big_endian>* object,
625 const Symbol_value<size>* psymval,
626 typename elfcpp::Elf_types<size>::Elf_Addr addend)
627 {
628 This_insn::template rela<32>(view, 10, 0x003fffff, object, psymval, addend);
629 }
630
631 // R_SPARC_PCPLT22: (Symbol + Addend - Address) >> 10
632 static inline void
633 pcplt22(unsigned char* view,
634 const Sized_relobj<size, big_endian>* object,
635 const Symbol_value<size>* psymval,
636 typename elfcpp::Elf_types<size>::Elf_Addr addend,
637 typename elfcpp::Elf_types<size>::Elf_Addr address)
638 {
639 This_insn::template pcrela<32>(view, 10, 0x003fffff, object,
640 psymval, addend, address);
641 }
642
643 // R_SPARC_LO10: (Symbol + Addend) & 0x3ff
644 static inline void
645 lo10(unsigned char* view,
646 typename elfcpp::Elf_types<size>::Elf_Addr value,
647 typename elfcpp::Elf_types<size>::Elf_Addr addend)
648 {
649 This_insn::template rela<32>(view, 0, 0x000003ff, value, addend);
650 }
651
652 // R_SPARC_LO10: (Symbol + Addend) & 0x3ff
653 static inline void
654 lo10(unsigned char* view,
655 const Sized_relobj<size, big_endian>* object,
656 const Symbol_value<size>* psymval,
657 typename elfcpp::Elf_types<size>::Elf_Addr addend)
658 {
659 This_insn::template rela<32>(view, 0, 0x000003ff, object, psymval, addend);
660 }
661
662 // R_SPARC_LO10: (Symbol + Addend) & 0x3ff
663 static inline void
664 lo10(unsigned char* view,
665 const Sized_relobj<size, big_endian>* object,
666 const Symbol_value<size>* psymval,
667 typename elfcpp::Elf_types<size>::Elf_Addr addend,
668 typename elfcpp::Elf_types<size>::Elf_Addr address)
669 {
670 This_insn::template pcrela<32>(view, 0, 0x000003ff, object,
671 psymval, addend, address);
672 }
673
674 // R_SPARC_OLO10: ((Symbol + Addend) & 0x3ff) + Addend2
675 static inline void
676 olo10(unsigned char* view,
677 const Sized_relobj<size, big_endian>* object,
678 const Symbol_value<size>* psymval,
679 typename elfcpp::Elf_types<size>::Elf_Addr addend,
680 typename elfcpp::Elf_types<size>::Elf_Addr addend2)
681 {
682 typedef typename elfcpp::Swap<32, true>::Valtype Valtype;
683 Valtype* wv = reinterpret_cast<Valtype*>(view);
684 Valtype val = elfcpp::Swap<32, true>::readval(wv);
685 Valtype reloc = psymval->value(object, addend);
686
687 val &= ~0x1fff;
688 reloc &= 0x3ff;
689 reloc += addend2;
690 reloc &= 0x1fff;
691
692 elfcpp::Swap<32, true>::writeval(wv, val | reloc);
693 }
694
695 // R_SPARC_22: (Symbol + Addend)
696 static inline void
697 rela32_22(unsigned char* view,
698 const Sized_relobj<size, big_endian>* object,
699 const Symbol_value<size>* psymval,
700 typename elfcpp::Elf_types<size>::Elf_Addr addend)
701 {
702 This_insn::template rela<32>(view, 0, 0x003fffff, object, psymval, addend);
703 }
704
705 // R_SPARC_13: (Symbol + Addend)
706 static inline void
707 rela32_13(unsigned char* view,
708 typename elfcpp::Elf_types<size>::Elf_Addr value,
709 typename elfcpp::Elf_types<size>::Elf_Addr addend)
710 {
711 This_insn::template rela<32>(view, 0, 0x00001fff, value, addend);
712 }
713
714 // R_SPARC_13: (Symbol + Addend)
715 static inline void
716 rela32_13(unsigned char* view,
717 const Sized_relobj<size, big_endian>* object,
718 const Symbol_value<size>* psymval,
719 typename elfcpp::Elf_types<size>::Elf_Addr addend)
720 {
721 This_insn::template rela<32>(view, 0, 0x00001fff, object, psymval, addend);
722 }
723
724 // R_SPARC_UA16: (Symbol + Addend)
725 static inline void
726 ua16(unsigned char* view,
727 const Sized_relobj<size, big_endian>* object,
728 const Symbol_value<size>* psymval,
729 typename elfcpp::Elf_types<size>::Elf_Addr addend)
730 {
731 This::template rela_ua<16>(view, 0, 0xffff, object, psymval, addend);
732 }
733
734 // R_SPARC_UA32: (Symbol + Addend)
735 static inline void
736 ua32(unsigned char* view,
737 const Sized_relobj<size, big_endian>* object,
738 const Symbol_value<size>* psymval,
739 typename elfcpp::Elf_types<size>::Elf_Addr addend)
740 {
741 This::template rela_ua<32>(view, 0, 0xffffffff, object, psymval, addend);
742 }
743
744 // R_SPARC_UA64: (Symbol + Addend)
745 static inline void
746 ua64(unsigned char* view,
747 const Sized_relobj<size, big_endian>* object,
748 const Symbol_value<size>* psymval,
749 typename elfcpp::Elf_types<size>::Elf_Addr addend)
750 {
751 This::template rela_ua<64>(view, 0, ~(elfcpp::Elf_Xword) 0,
752 object, psymval, addend);
753 }
754
755 // R_SPARC_DISP8: (Symbol + Addend - Address)
756 static inline void
757 disp8(unsigned char* view,
758 const Sized_relobj<size, big_endian>* object,
759 const Symbol_value<size>* psymval,
760 typename elfcpp::Elf_types<size>::Elf_Addr addend,
761 typename elfcpp::Elf_types<size>::Elf_Addr address)
762 {
763 This::template pcrela_unaligned<8>(view, object, psymval,
764 addend, address);
765 }
766
767 // R_SPARC_DISP16: (Symbol + Addend - Address)
768 static inline void
769 disp16(unsigned char* view,
770 const Sized_relobj<size, big_endian>* object,
771 const Symbol_value<size>* psymval,
772 typename elfcpp::Elf_types<size>::Elf_Addr addend,
773 typename elfcpp::Elf_types<size>::Elf_Addr address)
774 {
775 This::template pcrela_unaligned<16>(view, object, psymval,
776 addend, address);
777 }
778
779 // R_SPARC_DISP32: (Symbol + Addend - Address)
780 static inline void
781 disp32(unsigned char* view,
782 const Sized_relobj<size, big_endian>* object,
783 const Symbol_value<size>* psymval,
784 typename elfcpp::Elf_types<size>::Elf_Addr addend,
785 typename elfcpp::Elf_types<size>::Elf_Addr address)
786 {
787 This::template pcrela_unaligned<32>(view, object, psymval,
788 addend, address);
789 }
790
791 // R_SPARC_DISP64: (Symbol + Addend - Address)
792 static inline void
793 disp64(unsigned char* view,
794 const Sized_relobj<size, big_endian>* object,
795 const Symbol_value<size>* psymval,
796 elfcpp::Elf_Xword addend,
797 typename elfcpp::Elf_types<size>::Elf_Addr address)
798 {
799 This::template pcrela_unaligned<64>(view, object, psymval,
800 addend, address);
801 }
802
803 // R_SPARC_H44: (Symbol + Addend) >> 22
804 static inline void
805 h44(unsigned char* view,
806 const Sized_relobj<size, big_endian>* object,
807 const Symbol_value<size>* psymval,
808 typename elfcpp::Elf_types<size>::Elf_Addr addend)
809 {
810 This_insn::template rela<32>(view, 22, 0x003fffff, object, psymval, addend);
811 }
812
813 // R_SPARC_M44: ((Symbol + Addend) >> 12) & 0x3ff
814 static inline void
815 m44(unsigned char* view,
816 const Sized_relobj<size, big_endian>* object,
817 const Symbol_value<size>* psymval,
818 typename elfcpp::Elf_types<size>::Elf_Addr addend)
819 {
820 This_insn::template rela<32>(view, 12, 0x000003ff, object, psymval, addend);
821 }
822
823 // R_SPARC_L44: (Symbol + Addend) & 0xfff
824 static inline void
825 l44(unsigned char* view,
826 const Sized_relobj<size, big_endian>* object,
827 const Symbol_value<size>* psymval,
828 typename elfcpp::Elf_types<size>::Elf_Addr addend)
829 {
830 This_insn::template rela<32>(view, 0, 0x00000fff, object, psymval, addend);
831 }
832
833 // R_SPARC_HH22: (Symbol + Addend) >> 42
834 static inline void
835 hh22(unsigned char* view,
836 const Sized_relobj<size, big_endian>* object,
837 const Symbol_value<size>* psymval,
838 typename elfcpp::Elf_types<size>::Elf_Addr addend)
839 {
840 This_insn::template rela<32>(view, 42, 0x003fffff, object, psymval, addend);
841 }
842
843 // R_SPARC_PC_HH22: (Symbol + Addend - Address) >> 42
844 static inline void
845 pc_hh22(unsigned char* view,
846 const Sized_relobj<size, big_endian>* object,
847 const Symbol_value<size>* psymval,
848 typename elfcpp::Elf_types<size>::Elf_Addr addend,
849 typename elfcpp::Elf_types<size>::Elf_Addr address)
850 {
851 This_insn::template pcrela<32>(view, 42, 0x003fffff, object,
852 psymval, addend, address);
853 }
854
855 // R_SPARC_HM10: ((Symbol + Addend) >> 32) & 0x3ff
856 static inline void
857 hm10(unsigned char* view,
858 const Sized_relobj<size, big_endian>* object,
859 const Symbol_value<size>* psymval,
860 typename elfcpp::Elf_types<size>::Elf_Addr addend)
861 {
862 This_insn::template rela<32>(view, 32, 0x000003ff, object, psymval, addend);
863 }
864
865 // R_SPARC_PC_HM10: ((Symbol + Addend - Address) >> 32) & 0x3ff
866 static inline void
867 pc_hm10(unsigned char* view,
868 const Sized_relobj<size, big_endian>* object,
869 const Symbol_value<size>* psymval,
870 typename elfcpp::Elf_types<size>::Elf_Addr addend,
871 typename elfcpp::Elf_types<size>::Elf_Addr address)
872 {
873 This_insn::template pcrela<32>(view, 32, 0x000003ff, object,
874 psymval, addend, address);
875 }
876
877 // R_SPARC_11: (Symbol + Addend)
878 static inline void
879 rela32_11(unsigned char* view,
880 const Sized_relobj<size, big_endian>* object,
881 const Symbol_value<size>* psymval,
882 typename elfcpp::Elf_types<size>::Elf_Addr addend)
883 {
884 This_insn::template rela<32>(view, 0, 0x000007ff, object, psymval, addend);
885 }
886
887 // R_SPARC_10: (Symbol + Addend)
888 static inline void
889 rela32_10(unsigned char* view,
890 const Sized_relobj<size, big_endian>* object,
891 const Symbol_value<size>* psymval,
892 typename elfcpp::Elf_types<size>::Elf_Addr addend)
893 {
894 This_insn::template rela<32>(view, 0, 0x000003ff, object, psymval, addend);
895 }
896
897 // R_SPARC_7: (Symbol + Addend)
898 static inline void
899 rela32_7(unsigned char* view,
900 const Sized_relobj<size, big_endian>* object,
901 const Symbol_value<size>* psymval,
902 typename elfcpp::Elf_types<size>::Elf_Addr addend)
903 {
904 This_insn::template rela<32>(view, 0, 0x0000007f, object, psymval, addend);
905 }
906
907 // R_SPARC_6: (Symbol + Addend)
908 static inline void
909 rela32_6(unsigned char* view,
910 const Sized_relobj<size, big_endian>* object,
911 const Symbol_value<size>* psymval,
912 typename elfcpp::Elf_types<size>::Elf_Addr addend)
913 {
914 This_insn::template rela<32>(view, 0, 0x0000003f, object, psymval, addend);
915 }
916
917 // R_SPARC_5: (Symbol + Addend)
918 static inline void
919 rela32_5(unsigned char* view,
920 const Sized_relobj<size, big_endian>* object,
921 const Symbol_value<size>* psymval,
922 typename elfcpp::Elf_types<size>::Elf_Addr addend)
923 {
924 This_insn::template rela<32>(view, 0, 0x0000001f, object, psymval, addend);
925 }
926
927 // R_SPARC_TLS_LDO_HIX22: @dtpoff(Symbol + Addend) >> 10
928 static inline void
929 ldo_hix22(unsigned char* view,
930 typename elfcpp::Elf_types<size>::Elf_Addr value,
931 typename elfcpp::Elf_types<size>::Elf_Addr addend)
932 {
933 This_insn::hi22(view, value, addend);
934 }
935
936 // R_SPARC_TLS_LDO_LOX10: @dtpoff(Symbol + Addend) & 0x3ff
937 static inline void
938 ldo_lox10(unsigned char* view,
939 typename elfcpp::Elf_types<size>::Elf_Addr value,
940 typename elfcpp::Elf_types<size>::Elf_Addr addend)
941 {
942 typedef typename elfcpp::Swap<32, true>::Valtype Valtype;
943 Valtype* wv = reinterpret_cast<Valtype*>(view);
944 Valtype val = elfcpp::Swap<32, true>::readval(wv);
945 Valtype reloc = (value + addend);
946
947 val &= ~0x1fff;
948 reloc &= 0x3ff;
949
950 elfcpp::Swap<32, true>::writeval(wv, val | reloc);
951 }
952
953 // R_SPARC_TLS_LE_HIX22: (@tpoff(Symbol + Addend) ^ 0xffffffffffffffff) >> 10
954 static inline void
955 hix22(unsigned char* view,
956 typename elfcpp::Elf_types<size>::Elf_Addr value,
957 typename elfcpp::Elf_types<size>::Elf_Addr addend)
958 {
959 typedef typename elfcpp::Swap<32, true>::Valtype Valtype;
960 Valtype* wv = reinterpret_cast<Valtype*>(view);
961 Valtype val = elfcpp::Swap<32, true>::readval(wv);
962 Valtype reloc = (value + addend);
963
964 val &= ~0x3fffff;
965
966 reloc ^= ~(Valtype)0;
967 reloc >>= 10;
968
969 reloc &= 0x3fffff;
970
971 elfcpp::Swap<32, true>::writeval(wv, val | reloc);
972 }
973
974 // R_SPARC_HIX22: ((Symbol + Addend) ^ 0xffffffffffffffff) >> 10
975 static inline void
976 hix22(unsigned char* view,
977 const Sized_relobj<size, big_endian>* object,
978 const Symbol_value<size>* psymval,
979 typename elfcpp::Elf_types<size>::Elf_Addr addend)
980 {
981 typedef typename elfcpp::Swap<32, true>::Valtype Valtype;
982 Valtype* wv = reinterpret_cast<Valtype*>(view);
983 Valtype val = elfcpp::Swap<32, true>::readval(wv);
984 Valtype reloc = psymval->value(object, addend);
985
986 val &= ~0x3fffff;
987
988 reloc ^= ~(Valtype)0;
989 reloc >>= 10;
990
991 reloc &= 0x3fffff;
992
993 elfcpp::Swap<32, true>::writeval(wv, val | reloc);
994 }
995
996
997 // R_SPARC_TLS_LE_LOX10: (@tpoff(Symbol + Addend) & 0x3ff) | 0x1c00
998 static inline void
999 lox10(unsigned char* view,
1000 typename elfcpp::Elf_types<size>::Elf_Addr value,
1001 typename elfcpp::Elf_types<size>::Elf_Addr addend)
1002 {
1003 typedef typename elfcpp::Swap<32, true>::Valtype Valtype;
1004 Valtype* wv = reinterpret_cast<Valtype*>(view);
1005 Valtype val = elfcpp::Swap<32, true>::readval(wv);
1006 Valtype reloc = (value + addend);
1007
1008 val &= ~0x1fff;
1009 reloc &= 0x3ff;
1010 reloc |= 0x1c00;
1011
1012 elfcpp::Swap<32, true>::writeval(wv, val | reloc);
1013 }
1014
1015 // R_SPARC_LOX10: ((Symbol + Addend) & 0x3ff) | 0x1c00
1016 static inline void
1017 lox10(unsigned char* view,
1018 const Sized_relobj<size, big_endian>* object,
1019 const Symbol_value<size>* psymval,
1020 typename elfcpp::Elf_types<size>::Elf_Addr addend)
1021 {
1022 typedef typename elfcpp::Swap<32, true>::Valtype Valtype;
1023 Valtype* wv = reinterpret_cast<Valtype*>(view);
1024 Valtype val = elfcpp::Swap<32, true>::readval(wv);
1025 Valtype reloc = psymval->value(object, addend);
1026
1027 val &= ~0x1fff;
1028 reloc &= 0x3ff;
1029 reloc |= 0x1c00;
1030
1031 elfcpp::Swap<32, true>::writeval(wv, val | reloc);
1032 }
1033 };
1034
1035 // Get the GOT section, creating it if necessary.
1036
1037 template<int size, bool big_endian>
1038 Output_data_got<size, big_endian>*
1039 Target_sparc<size, big_endian>::got_section(Symbol_table* symtab,
1040 Layout* layout)
1041 {
1042 if (this->got_ == NULL)
1043 {
1044 gold_assert(symtab != NULL && layout != NULL);
1045
1046 this->got_ = new Output_data_got<size, big_endian>();
1047
1048 Output_section* os;
1049 os = layout->add_output_section_data(".got", elfcpp::SHT_PROGBITS,
1050 (elfcpp::SHF_ALLOC
1051 | elfcpp::SHF_WRITE),
1052 this->got_, false, true, false,
1053 false);
1054
1055 // Define _GLOBAL_OFFSET_TABLE_ at the start of the .got section.
1056 symtab->define_in_output_data("_GLOBAL_OFFSET_TABLE_", NULL,
1057 Symbol_table::PREDEFINED,
1058 this->got_,
1059 0, 0, elfcpp::STT_OBJECT,
1060 elfcpp::STB_LOCAL,
1061 elfcpp::STV_HIDDEN, 0,
1062 false, false);
1063 }
1064
1065 return this->got_;
1066 }
1067
1068 // Get the dynamic reloc section, creating it if necessary.
1069
1070 template<int size, bool big_endian>
1071 typename Target_sparc<size, big_endian>::Reloc_section*
1072 Target_sparc<size, big_endian>::rela_dyn_section(Layout* layout)
1073 {
1074 if (this->rela_dyn_ == NULL)
1075 {
1076 gold_assert(layout != NULL);
1077 this->rela_dyn_ = new Reloc_section(parameters->options().combreloc());
1078 layout->add_output_section_data(".rela.dyn", elfcpp::SHT_RELA,
1079 elfcpp::SHF_ALLOC, this->rela_dyn_, true,
1080 false, false, false);
1081 }
1082 return this->rela_dyn_;
1083 }
1084
1085 // A class to handle the PLT data.
1086
1087 template<int size, bool big_endian>
1088 class Output_data_plt_sparc : public Output_section_data
1089 {
1090 public:
1091 typedef Output_data_reloc<elfcpp::SHT_RELA, true,
1092 size, big_endian> Reloc_section;
1093
1094 Output_data_plt_sparc(Layout*);
1095
1096 // Add an entry to the PLT.
1097 void add_entry(Symbol* gsym);
1098
1099 // Return the .rela.plt section data.
1100 const Reloc_section* rel_plt() const
1101 {
1102 return this->rel_;
1103 }
1104
1105 protected:
1106 void do_adjust_output_section(Output_section* os);
1107
1108 // Write to a map file.
1109 void
1110 do_print_to_mapfile(Mapfile* mapfile) const
1111 { mapfile->print_output_data(this, _("** PLT")); }
1112
1113 private:
1114 // The size of an entry in the PLT.
1115 static const int base_plt_entry_size = (size == 32 ? 12 : 32);
1116
1117 static const unsigned int plt_entries_per_block = 160;
1118 static const unsigned int plt_insn_chunk_size = 24;
1119 static const unsigned int plt_pointer_chunk_size = 8;
1120 static const unsigned int plt_block_size =
1121 (plt_entries_per_block
1122 * (plt_insn_chunk_size + plt_pointer_chunk_size));
1123
1124 // Set the final size.
1125 void
1126 set_final_data_size()
1127 {
1128 unsigned int full_count = this->count_ + 4;
1129 unsigned int extra = (size == 32 ? 4 : 0);
1130
1131 if (size == 32 || full_count < 32768)
1132 this->set_data_size((full_count * base_plt_entry_size) + extra);
1133 else
1134 {
1135 unsigned int ext_cnt = full_count - 32768;
1136
1137 this->set_data_size((32768 * base_plt_entry_size)
1138 + (ext_cnt
1139 * (plt_insn_chunk_size
1140 + plt_pointer_chunk_size)));
1141 }
1142 }
1143
1144 // Write out the PLT data.
1145 void
1146 do_write(Output_file*);
1147
1148 // The reloc section.
1149 Reloc_section* rel_;
1150 // The number of PLT entries.
1151 unsigned int count_;
1152 };
1153
1154 // Define the constants as required by C++ standard.
1155
1156 template<int size, bool big_endian>
1157 const int Output_data_plt_sparc<size, big_endian>::base_plt_entry_size;
1158
1159 template<int size, bool big_endian>
1160 const unsigned int
1161 Output_data_plt_sparc<size, big_endian>::plt_entries_per_block;
1162
1163 template<int size, bool big_endian>
1164 const unsigned int Output_data_plt_sparc<size, big_endian>::plt_insn_chunk_size;
1165
1166 template<int size, bool big_endian>
1167 const unsigned int
1168 Output_data_plt_sparc<size, big_endian>::plt_pointer_chunk_size;
1169
1170 template<int size, bool big_endian>
1171 const unsigned int Output_data_plt_sparc<size, big_endian>::plt_block_size;
1172
1173 // Create the PLT section. The ordinary .got section is an argument,
1174 // since we need to refer to the start.
1175
1176 template<int size, bool big_endian>
1177 Output_data_plt_sparc<size, big_endian>::Output_data_plt_sparc(Layout* layout)
1178 : Output_section_data(size == 32 ? 4 : 8), count_(0)
1179 {
1180 this->rel_ = new Reloc_section(false);
1181 layout->add_output_section_data(".rela.plt", elfcpp::SHT_RELA,
1182 elfcpp::SHF_ALLOC, this->rel_, true,
1183 false, false, false);
1184 }
1185
1186 template<int size, bool big_endian>
1187 void
1188 Output_data_plt_sparc<size, big_endian>::do_adjust_output_section(Output_section* os)
1189 {
1190 os->set_entsize(0);
1191 }
1192
1193 // Add an entry to the PLT.
1194
1195 template<int size, bool big_endian>
1196 void
1197 Output_data_plt_sparc<size, big_endian>::add_entry(Symbol* gsym)
1198 {
1199 gold_assert(!gsym->has_plt_offset());
1200
1201 unsigned int index = this->count_ + 4;
1202 section_offset_type plt_offset;
1203
1204 if (size == 32 || index < 32768)
1205 plt_offset = index * base_plt_entry_size;
1206 else
1207 {
1208 unsigned int ext_index = index - 32768;
1209
1210 plt_offset = (32768 * base_plt_entry_size)
1211 + ((ext_index / plt_entries_per_block)
1212 * plt_block_size)
1213 + ((ext_index % plt_entries_per_block)
1214 * plt_insn_chunk_size);
1215 }
1216
1217 gsym->set_plt_offset(plt_offset);
1218
1219 ++this->count_;
1220
1221 // Every PLT entry needs a reloc.
1222 gsym->set_needs_dynsym_entry();
1223 this->rel_->add_global(gsym, elfcpp::R_SPARC_JMP_SLOT, this,
1224 plt_offset, 0);
1225
1226 // Note that we don't need to save the symbol. The contents of the
1227 // PLT are independent of which symbols are used. The symbols only
1228 // appear in the relocations.
1229 }
1230
1231 static const unsigned int sparc_nop = 0x01000000;
1232 static const unsigned int sparc_sethi_g1 = 0x03000000;
1233 static const unsigned int sparc_branch_always = 0x30800000;
1234 static const unsigned int sparc_branch_always_pt = 0x30680000;
1235 static const unsigned int sparc_mov = 0x80100000;
1236 static const unsigned int sparc_mov_g0_o0 = 0x90100000;
1237 static const unsigned int sparc_mov_o7_g5 = 0x8a10000f;
1238 static const unsigned int sparc_call_plus_8 = 0x40000002;
1239 static const unsigned int sparc_ldx_o7_imm_g1 = 0xc25be000;
1240 static const unsigned int sparc_jmpl_o7_g1_g1 = 0x83c3c001;
1241 static const unsigned int sparc_mov_g5_o7 = 0x9e100005;
1242
1243 // Write out the PLT.
1244
1245 template<int size, bool big_endian>
1246 void
1247 Output_data_plt_sparc<size, big_endian>::do_write(Output_file* of)
1248 {
1249 const off_t offset = this->offset();
1250 const section_size_type oview_size =
1251 convert_to_section_size_type(this->data_size());
1252 unsigned char* const oview = of->get_output_view(offset, oview_size);
1253 unsigned char* pov = oview;
1254
1255 memset(pov, 0, base_plt_entry_size * 4);
1256 pov += base_plt_entry_size * 4;
1257
1258 unsigned int plt_offset = base_plt_entry_size * 4;
1259 const unsigned int count = this->count_;
1260
1261 if (size == 64)
1262 {
1263 unsigned int limit;
1264
1265 limit = (count > 32768 ? 32768 : count);
1266
1267 for (unsigned int i = 0; i < limit; ++i)
1268 {
1269 elfcpp::Swap<32, true>::writeval(pov + 0x00,
1270 sparc_sethi_g1 + plt_offset);
1271 elfcpp::Swap<32, true>::writeval(pov + 0x04,
1272 sparc_branch_always_pt +
1273 (((base_plt_entry_size -
1274 (plt_offset + 4)) >> 2) &
1275 0x7ffff));
1276 elfcpp::Swap<32, true>::writeval(pov + 0x08, sparc_nop);
1277 elfcpp::Swap<32, true>::writeval(pov + 0x0c, sparc_nop);
1278 elfcpp::Swap<32, true>::writeval(pov + 0x10, sparc_nop);
1279 elfcpp::Swap<32, true>::writeval(pov + 0x14, sparc_nop);
1280 elfcpp::Swap<32, true>::writeval(pov + 0x18, sparc_nop);
1281 elfcpp::Swap<32, true>::writeval(pov + 0x1c, sparc_nop);
1282
1283 pov += base_plt_entry_size;
1284 plt_offset += base_plt_entry_size;
1285 }
1286
1287 if (count > 32768)
1288 {
1289 unsigned int ext_cnt = count - 32768;
1290 unsigned int blks = ext_cnt / plt_entries_per_block;
1291
1292 for (unsigned int i = 0; i < blks; ++i)
1293 {
1294 unsigned int data_off = (plt_entries_per_block
1295 * plt_insn_chunk_size) - 4;
1296
1297 for (unsigned int j = 0; j < plt_entries_per_block; ++j)
1298 {
1299 elfcpp::Swap<32, true>::writeval(pov + 0x00,
1300 sparc_mov_o7_g5);
1301 elfcpp::Swap<32, true>::writeval(pov + 0x04,
1302 sparc_call_plus_8);
1303 elfcpp::Swap<32, true>::writeval(pov + 0x08,
1304 sparc_nop);
1305 elfcpp::Swap<32, true>::writeval(pov + 0x0c,
1306 sparc_ldx_o7_imm_g1 +
1307 (data_off & 0x1fff));
1308 elfcpp::Swap<32, true>::writeval(pov + 0x10,
1309 sparc_jmpl_o7_g1_g1);
1310 elfcpp::Swap<32, true>::writeval(pov + 0x14,
1311 sparc_mov_g5_o7);
1312
1313 elfcpp::Swap<64, big_endian>::writeval(
1314 pov + 0x4 + data_off,
1315 (elfcpp::Elf_Xword) (oview - (pov + 0x04)));
1316
1317 pov += plt_insn_chunk_size;
1318 data_off -= 16;
1319 }
1320 }
1321
1322 unsigned int sub_blk_cnt = ext_cnt % plt_entries_per_block;
1323 for (unsigned int i = 0; i < sub_blk_cnt; ++i)
1324 {
1325 unsigned int data_off = (sub_blk_cnt
1326 * plt_insn_chunk_size) - 4;
1327
1328 for (unsigned int j = 0; j < plt_entries_per_block; ++j)
1329 {
1330 elfcpp::Swap<32, true>::writeval(pov + 0x00,
1331 sparc_mov_o7_g5);
1332 elfcpp::Swap<32, true>::writeval(pov + 0x04,
1333 sparc_call_plus_8);
1334 elfcpp::Swap<32, true>::writeval(pov + 0x08,
1335 sparc_nop);
1336 elfcpp::Swap<32, true>::writeval(pov + 0x0c,
1337 sparc_ldx_o7_imm_g1 +
1338 (data_off & 0x1fff));
1339 elfcpp::Swap<32, true>::writeval(pov + 0x10,
1340 sparc_jmpl_o7_g1_g1);
1341 elfcpp::Swap<32, true>::writeval(pov + 0x14,
1342 sparc_mov_g5_o7);
1343
1344 elfcpp::Swap<64, big_endian>::writeval(
1345 pov + 0x4 + data_off,
1346 (elfcpp::Elf_Xword) (oview - (pov + 0x04)));
1347
1348 pov += plt_insn_chunk_size;
1349 data_off -= 16;
1350 }
1351 }
1352 }
1353 }
1354 else
1355 {
1356 for (unsigned int i = 0; i < count; ++i)
1357 {
1358 elfcpp::Swap<32, true>::writeval(pov + 0x00,
1359 sparc_sethi_g1 + plt_offset);
1360 elfcpp::Swap<32, true>::writeval(pov + 0x04,
1361 sparc_branch_always +
1362 (((- (plt_offset + 4)) >> 2) &
1363 0x003fffff));
1364 elfcpp::Swap<32, true>::writeval(pov + 0x08, sparc_nop);
1365
1366 pov += base_plt_entry_size;
1367 plt_offset += base_plt_entry_size;
1368 }
1369
1370 elfcpp::Swap<32, true>::writeval(pov, sparc_nop);
1371 pov += 4;
1372 }
1373
1374 gold_assert(static_cast<section_size_type>(pov - oview) == oview_size);
1375
1376 of->write_output_view(offset, oview_size, oview);
1377 }
1378
1379 // Create a PLT entry for a global symbol.
1380
1381 template<int size, bool big_endian>
1382 void
1383 Target_sparc<size, big_endian>::make_plt_entry(Symbol_table* symtab,
1384 Layout* layout,
1385 Symbol* gsym)
1386 {
1387 if (gsym->has_plt_offset())
1388 return;
1389
1390 if (this->plt_ == NULL)
1391 {
1392 // Create the GOT sections first.
1393 this->got_section(symtab, layout);
1394
1395 // Ensure that .rela.dyn always appears before .rela.plt This is
1396 // necessary due to how, on Sparc and some other targets, .rela.dyn
1397 // needs to include .rela.plt in it's range.
1398 this->rela_dyn_section(layout);
1399
1400 this->plt_ = new Output_data_plt_sparc<size, big_endian>(layout);
1401 layout->add_output_section_data(".plt", elfcpp::SHT_PROGBITS,
1402 (elfcpp::SHF_ALLOC
1403 | elfcpp::SHF_EXECINSTR
1404 | elfcpp::SHF_WRITE),
1405 this->plt_, false, false, false, false);
1406
1407 // Define _PROCEDURE_LINKAGE_TABLE_ at the start of the .plt section.
1408 symtab->define_in_output_data("_PROCEDURE_LINKAGE_TABLE_", NULL,
1409 Symbol_table::PREDEFINED,
1410 this->plt_,
1411 0, 0, elfcpp::STT_OBJECT,
1412 elfcpp::STB_LOCAL,
1413 elfcpp::STV_HIDDEN, 0,
1414 false, false);
1415 }
1416
1417 this->plt_->add_entry(gsym);
1418 }
1419
1420 // Create a GOT entry for the TLS module index.
1421
1422 template<int size, bool big_endian>
1423 unsigned int
1424 Target_sparc<size, big_endian>::got_mod_index_entry(Symbol_table* symtab,
1425 Layout* layout,
1426 Sized_relobj<size, big_endian>* object)
1427 {
1428 if (this->got_mod_index_offset_ == -1U)
1429 {
1430 gold_assert(symtab != NULL && layout != NULL && object != NULL);
1431 Reloc_section* rela_dyn = this->rela_dyn_section(layout);
1432 Output_data_got<size, big_endian>* got;
1433 unsigned int got_offset;
1434
1435 got = this->got_section(symtab, layout);
1436 got_offset = got->add_constant(0);
1437 rela_dyn->add_local(object, 0,
1438 (size == 64 ?
1439 elfcpp::R_SPARC_TLS_DTPMOD64 :
1440 elfcpp::R_SPARC_TLS_DTPMOD32), got,
1441 got_offset, 0);
1442 got->add_constant(0);
1443 this->got_mod_index_offset_ = got_offset;
1444 }
1445 return this->got_mod_index_offset_;
1446 }
1447
1448 // Optimize the TLS relocation type based on what we know about the
1449 // symbol. IS_FINAL is true if the final address of this symbol is
1450 // known at link time.
1451
1452 static tls::Tls_optimization
1453 optimize_tls_reloc(bool is_final, int r_type)
1454 {
1455 // If we are generating a shared library, then we can't do anything
1456 // in the linker.
1457 if (parameters->options().shared())
1458 return tls::TLSOPT_NONE;
1459
1460 switch (r_type)
1461 {
1462 case elfcpp::R_SPARC_TLS_GD_HI22: // Global-dynamic
1463 case elfcpp::R_SPARC_TLS_GD_LO10:
1464 case elfcpp::R_SPARC_TLS_GD_ADD:
1465 case elfcpp::R_SPARC_TLS_GD_CALL:
1466 // These are General-Dynamic which permits fully general TLS
1467 // access. Since we know that we are generating an executable,
1468 // we can convert this to Initial-Exec. If we also know that
1469 // this is a local symbol, we can further switch to Local-Exec.
1470 if (is_final)
1471 return tls::TLSOPT_TO_LE;
1472 return tls::TLSOPT_TO_IE;
1473
1474 case elfcpp::R_SPARC_TLS_LDM_HI22: // Local-dynamic
1475 case elfcpp::R_SPARC_TLS_LDM_LO10:
1476 case elfcpp::R_SPARC_TLS_LDM_ADD:
1477 case elfcpp::R_SPARC_TLS_LDM_CALL:
1478 // This is Local-Dynamic, which refers to a local symbol in the
1479 // dynamic TLS block. Since we know that we generating an
1480 // executable, we can switch to Local-Exec.
1481 return tls::TLSOPT_TO_LE;
1482
1483 case elfcpp::R_SPARC_TLS_LDO_HIX22: // Alternate local-dynamic
1484 case elfcpp::R_SPARC_TLS_LDO_LOX10:
1485 case elfcpp::R_SPARC_TLS_LDO_ADD:
1486 // Another type of Local-Dynamic relocation.
1487 return tls::TLSOPT_TO_LE;
1488
1489 case elfcpp::R_SPARC_TLS_IE_HI22: // Initial-exec
1490 case elfcpp::R_SPARC_TLS_IE_LO10:
1491 case elfcpp::R_SPARC_TLS_IE_LD:
1492 case elfcpp::R_SPARC_TLS_IE_LDX:
1493 case elfcpp::R_SPARC_TLS_IE_ADD:
1494 // These are Initial-Exec relocs which get the thread offset
1495 // from the GOT. If we know that we are linking against the
1496 // local symbol, we can switch to Local-Exec, which links the
1497 // thread offset into the instruction.
1498 if (is_final)
1499 return tls::TLSOPT_TO_LE;
1500 return tls::TLSOPT_NONE;
1501
1502 case elfcpp::R_SPARC_TLS_LE_HIX22: // Local-exec
1503 case elfcpp::R_SPARC_TLS_LE_LOX10:
1504 // When we already have Local-Exec, there is nothing further we
1505 // can do.
1506 return tls::TLSOPT_NONE;
1507
1508 default:
1509 gold_unreachable();
1510 }
1511 }
1512
1513 // Generate a PLT entry slot for a call to __tls_get_addr
1514 template<int size, bool big_endian>
1515 void
1516 Target_sparc<size, big_endian>::Scan::generate_tls_call(Symbol_table* symtab,
1517 Layout* layout,
1518 Target_sparc<size, big_endian>* target)
1519 {
1520 Symbol* gsym = target->tls_get_addr_sym(symtab);
1521
1522 target->make_plt_entry(symtab, layout, gsym);
1523 }
1524
1525 // Report an unsupported relocation against a local symbol.
1526
1527 template<int size, bool big_endian>
1528 void
1529 Target_sparc<size, big_endian>::Scan::unsupported_reloc_local(
1530 Sized_relobj<size, big_endian>* object,
1531 unsigned int r_type)
1532 {
1533 gold_error(_("%s: unsupported reloc %u against local symbol"),
1534 object->name().c_str(), r_type);
1535 }
1536
1537 // We are about to emit a dynamic relocation of type R_TYPE. If the
1538 // dynamic linker does not support it, issue an error.
1539
1540 template<int size, bool big_endian>
1541 void
1542 Target_sparc<size, big_endian>::Scan::check_non_pic(Relobj* object, unsigned int r_type)
1543 {
1544 gold_assert(r_type != elfcpp::R_SPARC_NONE);
1545
1546 if (size == 64)
1547 {
1548 switch (r_type)
1549 {
1550 // These are the relocation types supported by glibc for sparc 64-bit.
1551 case elfcpp::R_SPARC_RELATIVE:
1552 case elfcpp::R_SPARC_COPY:
1553 case elfcpp::R_SPARC_64:
1554 case elfcpp::R_SPARC_GLOB_DAT:
1555 case elfcpp::R_SPARC_JMP_SLOT:
1556 case elfcpp::R_SPARC_TLS_DTPMOD64:
1557 case elfcpp::R_SPARC_TLS_DTPOFF64:
1558 case elfcpp::R_SPARC_TLS_TPOFF64:
1559 case elfcpp::R_SPARC_TLS_LE_HIX22:
1560 case elfcpp::R_SPARC_TLS_LE_LOX10:
1561 case elfcpp::R_SPARC_8:
1562 case elfcpp::R_SPARC_16:
1563 case elfcpp::R_SPARC_DISP8:
1564 case elfcpp::R_SPARC_DISP16:
1565 case elfcpp::R_SPARC_DISP32:
1566 case elfcpp::R_SPARC_WDISP30:
1567 case elfcpp::R_SPARC_LO10:
1568 case elfcpp::R_SPARC_HI22:
1569 case elfcpp::R_SPARC_OLO10:
1570 case elfcpp::R_SPARC_H44:
1571 case elfcpp::R_SPARC_M44:
1572 case elfcpp::R_SPARC_L44:
1573 case elfcpp::R_SPARC_HH22:
1574 case elfcpp::R_SPARC_HM10:
1575 case elfcpp::R_SPARC_LM22:
1576 case elfcpp::R_SPARC_UA16:
1577 case elfcpp::R_SPARC_UA32:
1578 case elfcpp::R_SPARC_UA64:
1579 return;
1580
1581 default:
1582 break;
1583 }
1584 }
1585 else
1586 {
1587 switch (r_type)
1588 {
1589 // These are the relocation types supported by glibc for sparc 32-bit.
1590 case elfcpp::R_SPARC_RELATIVE:
1591 case elfcpp::R_SPARC_COPY:
1592 case elfcpp::R_SPARC_GLOB_DAT:
1593 case elfcpp::R_SPARC_32:
1594 case elfcpp::R_SPARC_JMP_SLOT:
1595 case elfcpp::R_SPARC_TLS_DTPMOD32:
1596 case elfcpp::R_SPARC_TLS_DTPOFF32:
1597 case elfcpp::R_SPARC_TLS_TPOFF32:
1598 case elfcpp::R_SPARC_TLS_LE_HIX22:
1599 case elfcpp::R_SPARC_TLS_LE_LOX10:
1600 case elfcpp::R_SPARC_8:
1601 case elfcpp::R_SPARC_16:
1602 case elfcpp::R_SPARC_DISP8:
1603 case elfcpp::R_SPARC_DISP16:
1604 case elfcpp::R_SPARC_DISP32:
1605 case elfcpp::R_SPARC_LO10:
1606 case elfcpp::R_SPARC_WDISP30:
1607 case elfcpp::R_SPARC_HI22:
1608 case elfcpp::R_SPARC_UA16:
1609 case elfcpp::R_SPARC_UA32:
1610 return;
1611
1612 default:
1613 break;
1614 }
1615 }
1616
1617 // This prevents us from issuing more than one error per reloc
1618 // section. But we can still wind up issuing more than one
1619 // error per object file.
1620 if (this->issued_non_pic_error_)
1621 return;
1622 gold_assert(parameters->options().output_is_position_independent());
1623 object->error(_("requires unsupported dynamic reloc; "
1624 "recompile with -fPIC"));
1625 this->issued_non_pic_error_ = true;
1626 return;
1627 }
1628
1629 // Scan a relocation for a local symbol.
1630
1631 template<int size, bool big_endian>
1632 inline void
1633 Target_sparc<size, big_endian>::Scan::local(
1634 Symbol_table* symtab,
1635 Layout* layout,
1636 Target_sparc<size, big_endian>* target,
1637 Sized_relobj<size, big_endian>* object,
1638 unsigned int data_shndx,
1639 Output_section* output_section,
1640 const elfcpp::Rela<size, big_endian>& reloc,
1641 unsigned int r_type,
1642 const elfcpp::Sym<size, big_endian>& lsym)
1643 {
1644 unsigned int orig_r_type = r_type;
1645
1646 r_type &= 0xff;
1647 switch (r_type)
1648 {
1649 case elfcpp::R_SPARC_NONE:
1650 case elfcpp::R_SPARC_REGISTER:
1651 case elfcpp::R_SPARC_GNU_VTINHERIT:
1652 case elfcpp::R_SPARC_GNU_VTENTRY:
1653 break;
1654
1655 case elfcpp::R_SPARC_64:
1656 case elfcpp::R_SPARC_32:
1657 // If building a shared library (or a position-independent
1658 // executable), we need to create a dynamic relocation for
1659 // this location. The relocation applied at link time will
1660 // apply the link-time value, so we flag the location with
1661 // an R_SPARC_RELATIVE relocation so the dynamic loader can
1662 // relocate it easily.
1663 if (parameters->options().output_is_position_independent())
1664 {
1665 Reloc_section* rela_dyn = target->rela_dyn_section(layout);
1666 unsigned int r_sym = elfcpp::elf_r_sym<size>(reloc.get_r_info());
1667 rela_dyn->add_local_relative(object, r_sym, elfcpp::R_SPARC_RELATIVE,
1668 output_section, data_shndx,
1669 reloc.get_r_offset(),
1670 reloc.get_r_addend());
1671 }
1672 break;
1673
1674 case elfcpp::R_SPARC_HIX22:
1675 case elfcpp::R_SPARC_LOX10:
1676 case elfcpp::R_SPARC_H44:
1677 case elfcpp::R_SPARC_M44:
1678 case elfcpp::R_SPARC_L44:
1679 case elfcpp::R_SPARC_HH22:
1680 case elfcpp::R_SPARC_HM10:
1681 case elfcpp::R_SPARC_LM22:
1682 case elfcpp::R_SPARC_UA64:
1683 case elfcpp::R_SPARC_UA32:
1684 case elfcpp::R_SPARC_UA16:
1685 case elfcpp::R_SPARC_HI22:
1686 case elfcpp::R_SPARC_LO10:
1687 case elfcpp::R_SPARC_OLO10:
1688 case elfcpp::R_SPARC_16:
1689 case elfcpp::R_SPARC_11:
1690 case elfcpp::R_SPARC_10:
1691 case elfcpp::R_SPARC_8:
1692 case elfcpp::R_SPARC_7:
1693 case elfcpp::R_SPARC_6:
1694 case elfcpp::R_SPARC_5:
1695 // If building a shared library (or a position-independent
1696 // executable), we need to create a dynamic relocation for
1697 // this location.
1698 if (parameters->options().output_is_position_independent())
1699 {
1700 Reloc_section* rela_dyn = target->rela_dyn_section(layout);
1701 unsigned int r_sym = elfcpp::elf_r_sym<size>(reloc.get_r_info());
1702
1703 check_non_pic(object, r_type);
1704 if (lsym.get_st_type() != elfcpp::STT_SECTION)
1705 {
1706 rela_dyn->add_local(object, r_sym, orig_r_type, output_section,
1707 data_shndx, reloc.get_r_offset(),
1708 reloc.get_r_addend());
1709 }
1710 else
1711 {
1712 gold_assert(lsym.get_st_value() == 0);
1713 rela_dyn->add_symbolless_local_addend(object, r_sym, orig_r_type,
1714 output_section, data_shndx,
1715 reloc.get_r_offset(),
1716 reloc.get_r_addend());
1717 }
1718 }
1719 break;
1720
1721 case elfcpp::R_SPARC_WDISP30:
1722 case elfcpp::R_SPARC_WPLT30:
1723 case elfcpp::R_SPARC_WDISP22:
1724 case elfcpp::R_SPARC_WDISP19:
1725 case elfcpp::R_SPARC_WDISP16:
1726 case elfcpp::R_SPARC_DISP8:
1727 case elfcpp::R_SPARC_DISP16:
1728 case elfcpp::R_SPARC_DISP32:
1729 case elfcpp::R_SPARC_DISP64:
1730 case elfcpp::R_SPARC_PC10:
1731 case elfcpp::R_SPARC_PC22:
1732 break;
1733
1734 case elfcpp::R_SPARC_GOTDATA_OP:
1735 case elfcpp::R_SPARC_GOTDATA_OP_HIX22:
1736 case elfcpp::R_SPARC_GOTDATA_OP_LOX10:
1737 case elfcpp::R_SPARC_GOT10:
1738 case elfcpp::R_SPARC_GOT13:
1739 case elfcpp::R_SPARC_GOT22:
1740 {
1741 // The symbol requires a GOT entry.
1742 Output_data_got<size, big_endian>* got;
1743 unsigned int r_sym;
1744
1745 got = target->got_section(symtab, layout);
1746 r_sym = elfcpp::elf_r_sym<size>(reloc.get_r_info());
1747
1748 // If we are generating a shared object, we need to add a
1749 // dynamic relocation for this symbol's GOT entry.
1750 if (parameters->options().output_is_position_independent())
1751 {
1752 if (!object->local_has_got_offset(r_sym, GOT_TYPE_STANDARD))
1753 {
1754 Reloc_section* rela_dyn = target->rela_dyn_section(layout);
1755 unsigned int off;
1756
1757 off = got->add_constant(0);
1758 object->set_local_got_offset(r_sym, GOT_TYPE_STANDARD, off);
1759 rela_dyn->add_local_relative(object, r_sym,
1760 elfcpp::R_SPARC_RELATIVE,
1761 got, off, 0);
1762 }
1763 }
1764 else
1765 got->add_local(object, r_sym, GOT_TYPE_STANDARD);
1766 }
1767 break;
1768
1769 // These are initial TLS relocs, which are expected when
1770 // linking.
1771 case elfcpp::R_SPARC_TLS_GD_HI22: // Global-dynamic
1772 case elfcpp::R_SPARC_TLS_GD_LO10:
1773 case elfcpp::R_SPARC_TLS_GD_ADD:
1774 case elfcpp::R_SPARC_TLS_GD_CALL:
1775 case elfcpp::R_SPARC_TLS_LDM_HI22 : // Local-dynamic
1776 case elfcpp::R_SPARC_TLS_LDM_LO10:
1777 case elfcpp::R_SPARC_TLS_LDM_ADD:
1778 case elfcpp::R_SPARC_TLS_LDM_CALL:
1779 case elfcpp::R_SPARC_TLS_LDO_HIX22: // Alternate local-dynamic
1780 case elfcpp::R_SPARC_TLS_LDO_LOX10:
1781 case elfcpp::R_SPARC_TLS_LDO_ADD:
1782 case elfcpp::R_SPARC_TLS_IE_HI22: // Initial-exec
1783 case elfcpp::R_SPARC_TLS_IE_LO10:
1784 case elfcpp::R_SPARC_TLS_IE_LD:
1785 case elfcpp::R_SPARC_TLS_IE_LDX:
1786 case elfcpp::R_SPARC_TLS_IE_ADD:
1787 case elfcpp::R_SPARC_TLS_LE_HIX22: // Local-exec
1788 case elfcpp::R_SPARC_TLS_LE_LOX10:
1789 {
1790 bool output_is_shared = parameters->options().shared();
1791 const tls::Tls_optimization optimized_type
1792 = optimize_tls_reloc(!output_is_shared, r_type);
1793 switch (r_type)
1794 {
1795 case elfcpp::R_SPARC_TLS_GD_HI22: // Global-dynamic
1796 case elfcpp::R_SPARC_TLS_GD_LO10:
1797 case elfcpp::R_SPARC_TLS_GD_ADD:
1798 case elfcpp::R_SPARC_TLS_GD_CALL:
1799 if (optimized_type == tls::TLSOPT_NONE)
1800 {
1801 // Create a pair of GOT entries for the module index and
1802 // dtv-relative offset.
1803 Output_data_got<size, big_endian>* got
1804 = target->got_section(symtab, layout);
1805 unsigned int r_sym = elfcpp::elf_r_sym<size>(reloc.get_r_info());
1806 unsigned int shndx = lsym.get_st_shndx();
1807 bool is_ordinary;
1808 shndx = object->adjust_sym_shndx(r_sym, shndx, &is_ordinary);
1809 if (!is_ordinary)
1810 object->error(_("local symbol %u has bad shndx %u"),
1811 r_sym, shndx);
1812 else
1813 got->add_local_pair_with_rela(object, r_sym,
1814 lsym.get_st_shndx(),
1815 GOT_TYPE_TLS_PAIR,
1816 target->rela_dyn_section(layout),
1817 (size == 64
1818 ? elfcpp::R_SPARC_TLS_DTPMOD64
1819 : elfcpp::R_SPARC_TLS_DTPMOD32),
1820 0);
1821 if (r_type == elfcpp::R_SPARC_TLS_GD_CALL)
1822 generate_tls_call(symtab, layout, target);
1823 }
1824 else if (optimized_type != tls::TLSOPT_TO_LE)
1825 unsupported_reloc_local(object, r_type);
1826 break;
1827
1828 case elfcpp::R_SPARC_TLS_LDM_HI22 : // Local-dynamic
1829 case elfcpp::R_SPARC_TLS_LDM_LO10:
1830 case elfcpp::R_SPARC_TLS_LDM_ADD:
1831 case elfcpp::R_SPARC_TLS_LDM_CALL:
1832 if (optimized_type == tls::TLSOPT_NONE)
1833 {
1834 // Create a GOT entry for the module index.
1835 target->got_mod_index_entry(symtab, layout, object);
1836
1837 if (r_type == elfcpp::R_SPARC_TLS_LDM_CALL)
1838 generate_tls_call(symtab, layout, target);
1839 }
1840 else if (optimized_type != tls::TLSOPT_TO_LE)
1841 unsupported_reloc_local(object, r_type);
1842 break;
1843
1844 case elfcpp::R_SPARC_TLS_LDO_HIX22: // Alternate local-dynamic
1845 case elfcpp::R_SPARC_TLS_LDO_LOX10:
1846 case elfcpp::R_SPARC_TLS_LDO_ADD:
1847 break;
1848
1849 case elfcpp::R_SPARC_TLS_IE_HI22: // Initial-exec
1850 case elfcpp::R_SPARC_TLS_IE_LO10:
1851 case elfcpp::R_SPARC_TLS_IE_LD:
1852 case elfcpp::R_SPARC_TLS_IE_LDX:
1853 case elfcpp::R_SPARC_TLS_IE_ADD:
1854 layout->set_has_static_tls();
1855 if (optimized_type == tls::TLSOPT_NONE)
1856 {
1857 // Create a GOT entry for the tp-relative offset.
1858 Output_data_got<size, big_endian>* got
1859 = target->got_section(symtab, layout);
1860 unsigned int r_sym = elfcpp::elf_r_sym<size>(reloc.get_r_info());
1861
1862 if (!object->local_has_got_offset(r_sym, GOT_TYPE_TLS_OFFSET))
1863 {
1864 Reloc_section* rela_dyn = target->rela_dyn_section(layout);
1865 unsigned int off = got->add_constant(0);
1866
1867 object->set_local_got_offset(r_sym, GOT_TYPE_TLS_OFFSET, off);
1868
1869 rela_dyn->add_symbolless_local_addend(object, r_sym,
1870 (size == 64 ?
1871 elfcpp::R_SPARC_TLS_TPOFF64 :
1872 elfcpp::R_SPARC_TLS_TPOFF32),
1873 got, off, 0);
1874 }
1875 }
1876 else if (optimized_type != tls::TLSOPT_TO_LE)
1877 unsupported_reloc_local(object, r_type);
1878 break;
1879
1880 case elfcpp::R_SPARC_TLS_LE_HIX22: // Local-exec
1881 case elfcpp::R_SPARC_TLS_LE_LOX10:
1882 layout->set_has_static_tls();
1883 if (output_is_shared)
1884 {
1885 // We need to create a dynamic relocation.
1886 gold_assert(lsym.get_st_type() != elfcpp::STT_SECTION);
1887 unsigned int r_sym = elfcpp::elf_r_sym<size>(reloc.get_r_info());
1888 Reloc_section* rela_dyn = target->rela_dyn_section(layout);
1889 rela_dyn->add_symbolless_local_addend(object, r_sym, r_type,
1890 output_section, data_shndx,
1891 reloc.get_r_offset(), 0);
1892 }
1893 break;
1894 }
1895 }
1896 break;
1897
1898 // These are relocations which should only be seen by the
1899 // dynamic linker, and should never be seen here.
1900 case elfcpp::R_SPARC_COPY:
1901 case elfcpp::R_SPARC_GLOB_DAT:
1902 case elfcpp::R_SPARC_JMP_SLOT:
1903 case elfcpp::R_SPARC_RELATIVE:
1904 case elfcpp::R_SPARC_TLS_DTPMOD64:
1905 case elfcpp::R_SPARC_TLS_DTPMOD32:
1906 case elfcpp::R_SPARC_TLS_DTPOFF64:
1907 case elfcpp::R_SPARC_TLS_DTPOFF32:
1908 case elfcpp::R_SPARC_TLS_TPOFF64:
1909 case elfcpp::R_SPARC_TLS_TPOFF32:
1910 gold_error(_("%s: unexpected reloc %u in object file"),
1911 object->name().c_str(), r_type);
1912 break;
1913
1914 default:
1915 unsupported_reloc_local(object, r_type);
1916 break;
1917 }
1918 }
1919
1920 // Report an unsupported relocation against a global symbol.
1921
1922 template<int size, bool big_endian>
1923 void
1924 Target_sparc<size, big_endian>::Scan::unsupported_reloc_global(
1925 Sized_relobj<size, big_endian>* object,
1926 unsigned int r_type,
1927 Symbol* gsym)
1928 {
1929 gold_error(_("%s: unsupported reloc %u against global symbol %s"),
1930 object->name().c_str(), r_type, gsym->demangled_name().c_str());
1931 }
1932
1933 // Scan a relocation for a global symbol.
1934
1935 template<int size, bool big_endian>
1936 inline void
1937 Target_sparc<size, big_endian>::Scan::global(
1938 Symbol_table* symtab,
1939 Layout* layout,
1940 Target_sparc<size, big_endian>* target,
1941 Sized_relobj<size, big_endian>* object,
1942 unsigned int data_shndx,
1943 Output_section* output_section,
1944 const elfcpp::Rela<size, big_endian>& reloc,
1945 unsigned int r_type,
1946 Symbol* gsym)
1947 {
1948 unsigned int orig_r_type = r_type;
1949
1950 // A reference to _GLOBAL_OFFSET_TABLE_ implies that we need a got
1951 // section. We check here to avoid creating a dynamic reloc against
1952 // _GLOBAL_OFFSET_TABLE_.
1953 if (!target->has_got_section()
1954 && strcmp(gsym->name(), "_GLOBAL_OFFSET_TABLE_") == 0)
1955 target->got_section(symtab, layout);
1956
1957 r_type &= 0xff;
1958 switch (r_type)
1959 {
1960 case elfcpp::R_SPARC_NONE:
1961 case elfcpp::R_SPARC_REGISTER:
1962 case elfcpp::R_SPARC_GNU_VTINHERIT:
1963 case elfcpp::R_SPARC_GNU_VTENTRY:
1964 break;
1965
1966 case elfcpp::R_SPARC_PLT64:
1967 case elfcpp::R_SPARC_PLT32:
1968 case elfcpp::R_SPARC_HIPLT22:
1969 case elfcpp::R_SPARC_LOPLT10:
1970 case elfcpp::R_SPARC_PCPLT32:
1971 case elfcpp::R_SPARC_PCPLT22:
1972 case elfcpp::R_SPARC_PCPLT10:
1973 case elfcpp::R_SPARC_WPLT30:
1974 // If the symbol is fully resolved, this is just a PC32 reloc.
1975 // Otherwise we need a PLT entry.
1976 if (gsym->final_value_is_known())
1977 break;
1978 // If building a shared library, we can also skip the PLT entry
1979 // if the symbol is defined in the output file and is protected
1980 // or hidden.
1981 if (gsym->is_defined()
1982 && !gsym->is_from_dynobj()
1983 && !gsym->is_preemptible())
1984 break;
1985 target->make_plt_entry(symtab, layout, gsym);
1986 break;
1987
1988 case elfcpp::R_SPARC_DISP8:
1989 case elfcpp::R_SPARC_DISP16:
1990 case elfcpp::R_SPARC_DISP32:
1991 case elfcpp::R_SPARC_DISP64:
1992 case elfcpp::R_SPARC_PC_HH22:
1993 case elfcpp::R_SPARC_PC_HM10:
1994 case elfcpp::R_SPARC_PC_LM22:
1995 case elfcpp::R_SPARC_PC10:
1996 case elfcpp::R_SPARC_PC22:
1997 case elfcpp::R_SPARC_WDISP30:
1998 case elfcpp::R_SPARC_WDISP22:
1999 case elfcpp::R_SPARC_WDISP19:
2000 case elfcpp::R_SPARC_WDISP16:
2001 {
2002 if (gsym->needs_plt_entry())
2003 target->make_plt_entry(symtab, layout, gsym);
2004 // Make a dynamic relocation if necessary.
2005 int flags = Symbol::NON_PIC_REF;
2006 if (gsym->type() == elfcpp::STT_FUNC)
2007 flags |= Symbol::FUNCTION_CALL;
2008 if (gsym->needs_dynamic_reloc(flags))
2009 {
2010 if (gsym->may_need_copy_reloc())
2011 {
2012 target->copy_reloc(symtab, layout, object,
2013 data_shndx, output_section, gsym,
2014 reloc);
2015 }
2016 else
2017 {
2018 Reloc_section* rela_dyn = target->rela_dyn_section(layout);
2019 check_non_pic(object, r_type);
2020 rela_dyn->add_global(gsym, orig_r_type, output_section, object,
2021 data_shndx, reloc.get_r_offset(),
2022 reloc.get_r_addend());
2023 }
2024 }
2025 }
2026 break;
2027
2028 case elfcpp::R_SPARC_UA64:
2029 case elfcpp::R_SPARC_64:
2030 case elfcpp::R_SPARC_HIX22:
2031 case elfcpp::R_SPARC_LOX10:
2032 case elfcpp::R_SPARC_H44:
2033 case elfcpp::R_SPARC_M44:
2034 case elfcpp::R_SPARC_L44:
2035 case elfcpp::R_SPARC_HH22:
2036 case elfcpp::R_SPARC_HM10:
2037 case elfcpp::R_SPARC_LM22:
2038 case elfcpp::R_SPARC_HI22:
2039 case elfcpp::R_SPARC_LO10:
2040 case elfcpp::R_SPARC_OLO10:
2041 case elfcpp::R_SPARC_UA32:
2042 case elfcpp::R_SPARC_32:
2043 case elfcpp::R_SPARC_UA16:
2044 case elfcpp::R_SPARC_16:
2045 case elfcpp::R_SPARC_11:
2046 case elfcpp::R_SPARC_10:
2047 case elfcpp::R_SPARC_8:
2048 case elfcpp::R_SPARC_7:
2049 case elfcpp::R_SPARC_6:
2050 case elfcpp::R_SPARC_5:
2051 {
2052 // Make a PLT entry if necessary.
2053 if (gsym->needs_plt_entry())
2054 {
2055 target->make_plt_entry(symtab, layout, gsym);
2056 // Since this is not a PC-relative relocation, we may be
2057 // taking the address of a function. In that case we need to
2058 // set the entry in the dynamic symbol table to the address of
2059 // the PLT entry.
2060 if (gsym->is_from_dynobj() && !parameters->options().shared())
2061 gsym->set_needs_dynsym_value();
2062 }
2063 // Make a dynamic relocation if necessary.
2064 if (gsym->needs_dynamic_reloc(Symbol::ABSOLUTE_REF))
2065 {
2066 unsigned int r_off = reloc.get_r_offset();
2067
2068 // The assembler can sometimes emit unaligned relocations
2069 // for dwarf2 cfi directives.
2070 switch (r_type)
2071 {
2072 case elfcpp::R_SPARC_16:
2073 if (r_off & 0x1)
2074 orig_r_type = r_type = elfcpp::R_SPARC_UA16;
2075 break;
2076 case elfcpp::R_SPARC_32:
2077 if (r_off & 0x3)
2078 orig_r_type = r_type = elfcpp::R_SPARC_UA32;
2079 break;
2080 case elfcpp::R_SPARC_64:
2081 if (r_off & 0x7)
2082 orig_r_type = r_type = elfcpp::R_SPARC_UA64;
2083 break;
2084 case elfcpp::R_SPARC_UA16:
2085 if (!(r_off & 0x1))
2086 orig_r_type = r_type = elfcpp::R_SPARC_16;
2087 break;
2088 case elfcpp::R_SPARC_UA32:
2089 if (!(r_off & 0x3))
2090 orig_r_type = r_type = elfcpp::R_SPARC_32;
2091 break;
2092 case elfcpp::R_SPARC_UA64:
2093 if (!(r_off & 0x7))
2094 orig_r_type = r_type = elfcpp::R_SPARC_64;
2095 break;
2096 }
2097
2098 if (gsym->may_need_copy_reloc())
2099 {
2100 target->copy_reloc(symtab, layout, object,
2101 data_shndx, output_section, gsym, reloc);
2102 }
2103 else if ((r_type == elfcpp::R_SPARC_32
2104 || r_type == elfcpp::R_SPARC_64)
2105 && gsym->can_use_relative_reloc(false))
2106 {
2107 Reloc_section* rela_dyn = target->rela_dyn_section(layout);
2108 rela_dyn->add_global_relative(gsym, elfcpp::R_SPARC_RELATIVE,
2109 output_section, object,
2110 data_shndx, reloc.get_r_offset(),
2111 reloc.get_r_addend());
2112 }
2113 else
2114 {
2115 Reloc_section* rela_dyn = target->rela_dyn_section(layout);
2116
2117 check_non_pic(object, r_type);
2118 if (gsym->is_from_dynobj()
2119 || gsym->is_undefined()
2120 || gsym->is_preemptible())
2121 rela_dyn->add_global(gsym, orig_r_type, output_section,
2122 object, data_shndx,
2123 reloc.get_r_offset(),
2124 reloc.get_r_addend());
2125 else
2126 rela_dyn->add_symbolless_global_addend(gsym, orig_r_type,
2127 output_section,
2128 object, data_shndx,
2129 reloc.get_r_offset(),
2130 reloc.get_r_addend());
2131 }
2132 }
2133 }
2134 break;
2135
2136 case elfcpp::R_SPARC_GOTDATA_OP:
2137 case elfcpp::R_SPARC_GOTDATA_OP_HIX22:
2138 case elfcpp::R_SPARC_GOTDATA_OP_LOX10:
2139 case elfcpp::R_SPARC_GOT10:
2140 case elfcpp::R_SPARC_GOT13:
2141 case elfcpp::R_SPARC_GOT22:
2142 {
2143 // The symbol requires a GOT entry.
2144 Output_data_got<size, big_endian>* got;
2145
2146 got = target->got_section(symtab, layout);
2147 if (gsym->final_value_is_known())
2148 got->add_global(gsym, GOT_TYPE_STANDARD);
2149 else
2150 {
2151 // If this symbol is not fully resolved, we need to add a
2152 // dynamic relocation for it.
2153 Reloc_section* rela_dyn = target->rela_dyn_section(layout);
2154 if (gsym->is_from_dynobj()
2155 || gsym->is_undefined()
2156 || gsym->is_preemptible())
2157 got->add_global_with_rela(gsym, GOT_TYPE_STANDARD, rela_dyn,
2158 elfcpp::R_SPARC_GLOB_DAT);
2159 else if (!gsym->has_got_offset(GOT_TYPE_STANDARD))
2160 {
2161 unsigned int off = got->add_constant(0);
2162
2163 gsym->set_got_offset(GOT_TYPE_STANDARD, off);
2164 rela_dyn->add_global_relative(gsym, elfcpp::R_SPARC_RELATIVE,
2165 got, off, 0);
2166 }
2167 }
2168 }
2169 break;
2170
2171 // These are initial tls relocs, which are expected when
2172 // linking.
2173 case elfcpp::R_SPARC_TLS_GD_HI22: // Global-dynamic
2174 case elfcpp::R_SPARC_TLS_GD_LO10:
2175 case elfcpp::R_SPARC_TLS_GD_ADD:
2176 case elfcpp::R_SPARC_TLS_GD_CALL:
2177 case elfcpp::R_SPARC_TLS_LDM_HI22: // Local-dynamic
2178 case elfcpp::R_SPARC_TLS_LDM_LO10:
2179 case elfcpp::R_SPARC_TLS_LDM_ADD:
2180 case elfcpp::R_SPARC_TLS_LDM_CALL:
2181 case elfcpp::R_SPARC_TLS_LDO_HIX22: // Alternate local-dynamic
2182 case elfcpp::R_SPARC_TLS_LDO_LOX10:
2183 case elfcpp::R_SPARC_TLS_LDO_ADD:
2184 case elfcpp::R_SPARC_TLS_LE_HIX22:
2185 case elfcpp::R_SPARC_TLS_LE_LOX10:
2186 case elfcpp::R_SPARC_TLS_IE_HI22: // Initial-exec
2187 case elfcpp::R_SPARC_TLS_IE_LO10:
2188 case elfcpp::R_SPARC_TLS_IE_LD:
2189 case elfcpp::R_SPARC_TLS_IE_LDX:
2190 case elfcpp::R_SPARC_TLS_IE_ADD:
2191 {
2192 const bool is_final = gsym->final_value_is_known();
2193 const tls::Tls_optimization optimized_type
2194 = optimize_tls_reloc(is_final, r_type);
2195 switch (r_type)
2196 {
2197 case elfcpp::R_SPARC_TLS_GD_HI22: // Global-dynamic
2198 case elfcpp::R_SPARC_TLS_GD_LO10:
2199 case elfcpp::R_SPARC_TLS_GD_ADD:
2200 case elfcpp::R_SPARC_TLS_GD_CALL:
2201 if (optimized_type == tls::TLSOPT_NONE)
2202 {
2203 // Create a pair of GOT entries for the module index and
2204 // dtv-relative offset.
2205 Output_data_got<size, big_endian>* got
2206 = target->got_section(symtab, layout);
2207 got->add_global_pair_with_rela(gsym, GOT_TYPE_TLS_PAIR,
2208 target->rela_dyn_section(layout),
2209 (size == 64 ?
2210 elfcpp::R_SPARC_TLS_DTPMOD64 :
2211 elfcpp::R_SPARC_TLS_DTPMOD32),
2212 (size == 64 ?
2213 elfcpp::R_SPARC_TLS_DTPOFF64 :
2214 elfcpp::R_SPARC_TLS_DTPOFF32));
2215
2216 // Emit R_SPARC_WPLT30 against "__tls_get_addr"
2217 if (r_type == elfcpp::R_SPARC_TLS_GD_CALL)
2218 generate_tls_call(symtab, layout, target);
2219 }
2220 else if (optimized_type == tls::TLSOPT_TO_IE)
2221 {
2222 // Create a GOT entry for the tp-relative offset.
2223 Output_data_got<size, big_endian>* got
2224 = target->got_section(symtab, layout);
2225 got->add_global_with_rela(gsym, GOT_TYPE_TLS_OFFSET,
2226 target->rela_dyn_section(layout),
2227 (size == 64 ?
2228 elfcpp::R_SPARC_TLS_TPOFF64 :
2229 elfcpp::R_SPARC_TLS_TPOFF32));
2230 }
2231 else if (optimized_type != tls::TLSOPT_TO_LE)
2232 unsupported_reloc_global(object, r_type, gsym);
2233 break;
2234
2235 case elfcpp::R_SPARC_TLS_LDM_HI22: // Local-dynamic
2236 case elfcpp::R_SPARC_TLS_LDM_LO10:
2237 case elfcpp::R_SPARC_TLS_LDM_ADD:
2238 case elfcpp::R_SPARC_TLS_LDM_CALL:
2239 if (optimized_type == tls::TLSOPT_NONE)
2240 {
2241 // Create a GOT entry for the module index.
2242 target->got_mod_index_entry(symtab, layout, object);
2243
2244 if (r_type == elfcpp::R_SPARC_TLS_LDM_CALL)
2245 generate_tls_call(symtab, layout, target);
2246 }
2247 else if (optimized_type != tls::TLSOPT_TO_LE)
2248 unsupported_reloc_global(object, r_type, gsym);
2249 break;
2250
2251 case elfcpp::R_SPARC_TLS_LDO_HIX22: // Alternate local-dynamic
2252 case elfcpp::R_SPARC_TLS_LDO_LOX10:
2253 case elfcpp::R_SPARC_TLS_LDO_ADD:
2254 break;
2255
2256 case elfcpp::R_SPARC_TLS_LE_HIX22:
2257 case elfcpp::R_SPARC_TLS_LE_LOX10:
2258 layout->set_has_static_tls();
2259 if (parameters->options().shared())
2260 {
2261 Reloc_section* rela_dyn = target->rela_dyn_section(layout);
2262 rela_dyn->add_symbolless_global_addend(gsym, orig_r_type,
2263 output_section, object,
2264 data_shndx, reloc.get_r_offset(),
2265 0);
2266 }
2267 break;
2268
2269 case elfcpp::R_SPARC_TLS_IE_HI22: // Initial-exec
2270 case elfcpp::R_SPARC_TLS_IE_LO10:
2271 case elfcpp::R_SPARC_TLS_IE_LD:
2272 case elfcpp::R_SPARC_TLS_IE_LDX:
2273 case elfcpp::R_SPARC_TLS_IE_ADD:
2274 layout->set_has_static_tls();
2275 if (optimized_type == tls::TLSOPT_NONE)
2276 {
2277 // Create a GOT entry for the tp-relative offset.
2278 Output_data_got<size, big_endian>* got
2279 = target->got_section(symtab, layout);
2280 got->add_global_with_rela(gsym, GOT_TYPE_TLS_OFFSET,
2281 target->rela_dyn_section(layout),
2282 (size == 64 ?
2283 elfcpp::R_SPARC_TLS_TPOFF64 :
2284 elfcpp::R_SPARC_TLS_TPOFF32));
2285 }
2286 else if (optimized_type != tls::TLSOPT_TO_LE)
2287 unsupported_reloc_global(object, r_type, gsym);
2288 break;
2289 }
2290 }
2291 break;
2292
2293 // These are relocations which should only be seen by the
2294 // dynamic linker, and should never be seen here.
2295 case elfcpp::R_SPARC_COPY:
2296 case elfcpp::R_SPARC_GLOB_DAT:
2297 case elfcpp::R_SPARC_JMP_SLOT:
2298 case elfcpp::R_SPARC_RELATIVE:
2299 case elfcpp::R_SPARC_TLS_DTPMOD64:
2300 case elfcpp::R_SPARC_TLS_DTPMOD32:
2301 case elfcpp::R_SPARC_TLS_DTPOFF64:
2302 case elfcpp::R_SPARC_TLS_DTPOFF32:
2303 case elfcpp::R_SPARC_TLS_TPOFF64:
2304 case elfcpp::R_SPARC_TLS_TPOFF32:
2305 gold_error(_("%s: unexpected reloc %u in object file"),
2306 object->name().c_str(), r_type);
2307 break;
2308
2309 default:
2310 unsupported_reloc_global(object, r_type, gsym);
2311 break;
2312 }
2313 }
2314
2315 // Process relocations for gc.
2316
2317 template<int size, bool big_endian>
2318 void
2319 Target_sparc<size, big_endian>::gc_process_relocs(
2320 Symbol_table* symtab,
2321 Layout* layout,
2322 Sized_relobj<size, big_endian>* object,
2323 unsigned int data_shndx,
2324 unsigned int,
2325 const unsigned char* prelocs,
2326 size_t reloc_count,
2327 Output_section* output_section,
2328 bool needs_special_offset_handling,
2329 size_t local_symbol_count,
2330 const unsigned char* plocal_symbols)
2331 {
2332 typedef Target_sparc<size, big_endian> Sparc;
2333 typedef typename Target_sparc<size, big_endian>::Scan Scan;
2334
2335 gold::gc_process_relocs<size, big_endian, Sparc, elfcpp::SHT_RELA, Scan>(
2336 symtab,
2337 layout,
2338 this,
2339 object,
2340 data_shndx,
2341 prelocs,
2342 reloc_count,
2343 output_section,
2344 needs_special_offset_handling,
2345 local_symbol_count,
2346 plocal_symbols);
2347 }
2348
2349 // Scan relocations for a section.
2350
2351 template<int size, bool big_endian>
2352 void
2353 Target_sparc<size, big_endian>::scan_relocs(
2354 Symbol_table* symtab,
2355 Layout* layout,
2356 Sized_relobj<size, big_endian>* object,
2357 unsigned int data_shndx,
2358 unsigned int sh_type,
2359 const unsigned char* prelocs,
2360 size_t reloc_count,
2361 Output_section* output_section,
2362 bool needs_special_offset_handling,
2363 size_t local_symbol_count,
2364 const unsigned char* plocal_symbols)
2365 {
2366 typedef Target_sparc<size, big_endian> Sparc;
2367 typedef typename Target_sparc<size, big_endian>::Scan Scan;
2368
2369 if (sh_type == elfcpp::SHT_REL)
2370 {
2371 gold_error(_("%s: unsupported REL reloc section"),
2372 object->name().c_str());
2373 return;
2374 }
2375
2376 gold::scan_relocs<size, big_endian, Sparc, elfcpp::SHT_RELA, Scan>(
2377 symtab,
2378 layout,
2379 this,
2380 object,
2381 data_shndx,
2382 prelocs,
2383 reloc_count,
2384 output_section,
2385 needs_special_offset_handling,
2386 local_symbol_count,
2387 plocal_symbols);
2388 }
2389
2390 // Finalize the sections.
2391
2392 template<int size, bool big_endian>
2393 void
2394 Target_sparc<size, big_endian>::do_finalize_sections(
2395 Layout* layout,
2396 const Input_objects*,
2397 Symbol_table*)
2398 {
2399 // Fill in some more dynamic tags.
2400 const Reloc_section* rel_plt = (this->plt_ == NULL
2401 ? NULL
2402 : this->plt_->rel_plt());
2403 layout->add_target_dynamic_tags(false, this->plt_, rel_plt,
2404 this->rela_dyn_, true, true);
2405
2406 // Emit any relocs we saved in an attempt to avoid generating COPY
2407 // relocs.
2408 if (this->copy_relocs_.any_saved_relocs())
2409 this->copy_relocs_.emit(this->rela_dyn_section(layout));
2410 }
2411
2412 // Perform a relocation.
2413
2414 template<int size, bool big_endian>
2415 inline bool
2416 Target_sparc<size, big_endian>::Relocate::relocate(
2417 const Relocate_info<size, big_endian>* relinfo,
2418 Target_sparc* target,
2419 Output_section*,
2420 size_t relnum,
2421 const elfcpp::Rela<size, big_endian>& rela,
2422 unsigned int r_type,
2423 const Sized_symbol<size>* gsym,
2424 const Symbol_value<size>* psymval,
2425 unsigned char* view,
2426 typename elfcpp::Elf_types<size>::Elf_Addr address,
2427 section_size_type view_size)
2428 {
2429 r_type &= 0xff;
2430
2431 if (this->ignore_gd_add_)
2432 {
2433 if (r_type != elfcpp::R_SPARC_TLS_GD_ADD)
2434 gold_error_at_location(relinfo, relnum, rela.get_r_offset(),
2435 _("missing expected TLS relocation"));
2436 else
2437 {
2438 this->ignore_gd_add_ = false;
2439 return false;
2440 }
2441 }
2442
2443 typedef Sparc_relocate_functions<size, big_endian> Reloc;
2444
2445 // Pick the value to use for symbols defined in shared objects.
2446 Symbol_value<size> symval;
2447 if (gsym != NULL
2448 && gsym->use_plt_offset(r_type == elfcpp::R_SPARC_DISP8
2449 || r_type == elfcpp::R_SPARC_DISP16
2450 || r_type == elfcpp::R_SPARC_DISP32
2451 || r_type == elfcpp::R_SPARC_DISP64
2452 || r_type == elfcpp::R_SPARC_PC_HH22
2453 || r_type == elfcpp::R_SPARC_PC_HM10
2454 || r_type == elfcpp::R_SPARC_PC_LM22
2455 || r_type == elfcpp::R_SPARC_PC10
2456 || r_type == elfcpp::R_SPARC_PC22
2457 || r_type == elfcpp::R_SPARC_WDISP30
2458 || r_type == elfcpp::R_SPARC_WDISP22
2459 || r_type == elfcpp::R_SPARC_WDISP19
2460 || r_type == elfcpp::R_SPARC_WDISP16))
2461 {
2462 elfcpp::Elf_Xword value;
2463
2464 value = target->plt_section()->address() + gsym->plt_offset();
2465
2466 symval.set_output_value(value);
2467
2468 psymval = &symval;
2469 }
2470
2471 const Sized_relobj<size, big_endian>* object = relinfo->object;
2472 const elfcpp::Elf_Xword addend = rela.get_r_addend();
2473
2474 // Get the GOT offset if needed. Unlike i386 and x86_64, our GOT
2475 // pointer points to the beginning, not the end, of the table.
2476 // So we just use the plain offset.
2477 bool have_got_offset = false;
2478 unsigned int got_offset = 0;
2479 switch (r_type)
2480 {
2481 case elfcpp::R_SPARC_GOTDATA_OP:
2482 case elfcpp::R_SPARC_GOTDATA_OP_HIX22:
2483 case elfcpp::R_SPARC_GOTDATA_OP_LOX10:
2484 case elfcpp::R_SPARC_GOT10:
2485 case elfcpp::R_SPARC_GOT13:
2486 case elfcpp::R_SPARC_GOT22:
2487 if (gsym != NULL)
2488 {
2489 gold_assert(gsym->has_got_offset(GOT_TYPE_STANDARD));
2490 got_offset = gsym->got_offset(GOT_TYPE_STANDARD);
2491 }
2492 else
2493 {
2494 unsigned int r_sym = elfcpp::elf_r_sym<size>(rela.get_r_info());
2495 gold_assert(object->local_has_got_offset(r_sym, GOT_TYPE_STANDARD));
2496 got_offset = object->local_got_offset(r_sym, GOT_TYPE_STANDARD);
2497 }
2498 have_got_offset = true;
2499 break;
2500
2501 default:
2502 break;
2503 }
2504
2505 switch (r_type)
2506 {
2507 case elfcpp::R_SPARC_NONE:
2508 case elfcpp::R_SPARC_REGISTER:
2509 case elfcpp::R_SPARC_GNU_VTINHERIT:
2510 case elfcpp::R_SPARC_GNU_VTENTRY:
2511 break;
2512
2513 case elfcpp::R_SPARC_8:
2514 Relocate_functions<size, big_endian>::rela8(view, object,
2515 psymval, addend);
2516 break;
2517
2518 case elfcpp::R_SPARC_16:
2519 if (rela.get_r_offset() & 0x1)
2520 {
2521 // The assembler can sometimes emit unaligned relocations
2522 // for dwarf2 cfi directives.
2523 Reloc::ua16(view, object, psymval, addend);
2524 }
2525 else
2526 Relocate_functions<size, big_endian>::rela16(view, object,
2527 psymval, addend);
2528 break;
2529
2530 case elfcpp::R_SPARC_32:
2531 if (!parameters->options().output_is_position_independent())
2532 {
2533 if (rela.get_r_offset() & 0x3)
2534 {
2535 // The assembler can sometimes emit unaligned relocations
2536 // for dwarf2 cfi directives.
2537 Reloc::ua32(view, object, psymval, addend);
2538 }
2539 else
2540 Relocate_functions<size, big_endian>::rela32(view, object,
2541 psymval, addend);
2542 }
2543 break;
2544
2545 case elfcpp::R_SPARC_DISP8:
2546 Reloc::disp8(view, object, psymval, addend, address);
2547 break;
2548
2549 case elfcpp::R_SPARC_DISP16:
2550 Reloc::disp16(view, object, psymval, addend, address);
2551 break;
2552
2553 case elfcpp::R_SPARC_DISP32:
2554 Reloc::disp32(view, object, psymval, addend, address);
2555 break;
2556
2557 case elfcpp::R_SPARC_DISP64:
2558 Reloc::disp64(view, object, psymval, addend, address);
2559 break;
2560
2561 case elfcpp::R_SPARC_WDISP30:
2562 case elfcpp::R_SPARC_WPLT30:
2563 Reloc::wdisp30(view, object, psymval, addend, address);
2564 break;
2565
2566 case elfcpp::R_SPARC_WDISP22:
2567 Reloc::wdisp22(view, object, psymval, addend, address);
2568 break;
2569
2570 case elfcpp::R_SPARC_WDISP19:
2571 Reloc::wdisp19(view, object, psymval, addend, address);
2572 break;
2573
2574 case elfcpp::R_SPARC_WDISP16:
2575 Reloc::wdisp16(view, object, psymval, addend, address);
2576 break;
2577
2578 case elfcpp::R_SPARC_HI22:
2579 Reloc::hi22(view, object, psymval, addend);
2580 break;
2581
2582 case elfcpp::R_SPARC_22:
2583 Reloc::rela32_22(view, object, psymval, addend);
2584 break;
2585
2586 case elfcpp::R_SPARC_13:
2587 Reloc::rela32_13(view, object, psymval, addend);
2588 break;
2589
2590 case elfcpp::R_SPARC_LO10:
2591 Reloc::lo10(view, object, psymval, addend);
2592 break;
2593
2594 case elfcpp::R_SPARC_GOT10:
2595 Reloc::lo10(view, got_offset, addend);
2596 break;
2597
2598 case elfcpp::R_SPARC_GOTDATA_OP:
2599 break;
2600
2601 case elfcpp::R_SPARC_GOTDATA_OP_LOX10:
2602 case elfcpp::R_SPARC_GOT13:
2603 Reloc::rela32_13(view, got_offset, addend);
2604 break;
2605
2606 case elfcpp::R_SPARC_GOTDATA_OP_HIX22:
2607 case elfcpp::R_SPARC_GOT22:
2608 Reloc::hi22(view, got_offset, addend);
2609 break;
2610
2611 case elfcpp::R_SPARC_PC10:
2612 Reloc::pc10(view, object, psymval, addend, address);
2613 break;
2614
2615 case elfcpp::R_SPARC_PC22:
2616 Reloc::pc22(view, object, psymval, addend, address);
2617 break;
2618
2619 case elfcpp::R_SPARC_TLS_DTPOFF32:
2620 case elfcpp::R_SPARC_UA32:
2621 Reloc::ua32(view, object, psymval, addend);
2622 break;
2623
2624 case elfcpp::R_SPARC_PLT64:
2625 Relocate_functions<size, big_endian>::rela64(view, object,
2626 psymval, addend);
2627 break;
2628
2629 case elfcpp::R_SPARC_PLT32:
2630 Relocate_functions<size, big_endian>::rela32(view, object,
2631 psymval, addend);
2632 break;
2633
2634 case elfcpp::R_SPARC_HIPLT22:
2635 Reloc::hi22(view, object, psymval, addend);
2636 break;
2637
2638 case elfcpp::R_SPARC_LOPLT10:
2639 Reloc::lo10(view, object, psymval, addend);
2640 break;
2641
2642 case elfcpp::R_SPARC_PCPLT32:
2643 Reloc::disp32(view, object, psymval, addend, address);
2644 break;
2645
2646 case elfcpp::R_SPARC_PCPLT22:
2647 Reloc::pcplt22(view, object, psymval, addend, address);
2648 break;
2649
2650 case elfcpp::R_SPARC_PCPLT10:
2651 Reloc::lo10(view, object, psymval, addend, address);
2652 break;
2653
2654 case elfcpp::R_SPARC_64:
2655 if (!parameters->options().output_is_position_independent())
2656 {
2657 if (rela.get_r_offset() & 0x7)
2658 {
2659 // The assembler can sometimes emit unaligned relocations
2660 // for dwarf2 cfi directives.
2661 Reloc::ua64(view, object, psymval, addend);
2662 }
2663 else
2664 Relocate_functions<size, big_endian>::rela64(view, object,
2665 psymval, addend);
2666 }
2667 break;
2668
2669 case elfcpp::R_SPARC_OLO10:
2670 {
2671 unsigned int addend2 = rela.get_r_info() & 0xffffffff;
2672 addend2 = ((addend2 >> 8) ^ 0x800000) - 0x800000;
2673 Reloc::olo10(view, object, psymval, addend, addend2);
2674 }
2675 break;
2676
2677 case elfcpp::R_SPARC_HH22:
2678 Reloc::hh22(view, object, psymval, addend);
2679 break;
2680
2681 case elfcpp::R_SPARC_PC_HH22:
2682 Reloc::pc_hh22(view, object, psymval, addend, address);
2683 break;
2684
2685 case elfcpp::R_SPARC_HM10:
2686 Reloc::hm10(view, object, psymval, addend);
2687 break;
2688
2689 case elfcpp::R_SPARC_PC_HM10:
2690 Reloc::pc_hm10(view, object, psymval, addend, address);
2691 break;
2692
2693 case elfcpp::R_SPARC_LM22:
2694 Reloc::hi22(view, object, psymval, addend);
2695 break;
2696
2697 case elfcpp::R_SPARC_PC_LM22:
2698 Reloc::pcplt22(view, object, psymval, addend, address);
2699 break;
2700
2701 case elfcpp::R_SPARC_11:
2702 Reloc::rela32_11(view, object, psymval, addend);
2703 break;
2704
2705 case elfcpp::R_SPARC_10:
2706 Reloc::rela32_10(view, object, psymval, addend);
2707 break;
2708
2709 case elfcpp::R_SPARC_7:
2710 Reloc::rela32_7(view, object, psymval, addend);
2711 break;
2712
2713 case elfcpp::R_SPARC_6:
2714 Reloc::rela32_6(view, object, psymval, addend);
2715 break;
2716
2717 case elfcpp::R_SPARC_5:
2718 Reloc::rela32_5(view, object, psymval, addend);
2719 break;
2720
2721 case elfcpp::R_SPARC_HIX22:
2722 Reloc::hix22(view, object, psymval, addend);
2723 break;
2724
2725 case elfcpp::R_SPARC_LOX10:
2726 Reloc::lox10(view, object, psymval, addend);
2727 break;
2728
2729 case elfcpp::R_SPARC_H44:
2730 Reloc::h44(view, object, psymval, addend);
2731 break;
2732
2733 case elfcpp::R_SPARC_M44:
2734 Reloc::m44(view, object, psymval, addend);
2735 break;
2736
2737 case elfcpp::R_SPARC_L44:
2738 Reloc::l44(view, object, psymval, addend);
2739 break;
2740
2741 case elfcpp::R_SPARC_TLS_DTPOFF64:
2742 case elfcpp::R_SPARC_UA64:
2743 Reloc::ua64(view, object, psymval, addend);
2744 break;
2745
2746 case elfcpp::R_SPARC_UA16:
2747 Reloc::ua16(view, object, psymval, addend);
2748 break;
2749
2750 case elfcpp::R_SPARC_TLS_GD_HI22:
2751 case elfcpp::R_SPARC_TLS_GD_LO10:
2752 case elfcpp::R_SPARC_TLS_GD_ADD:
2753 case elfcpp::R_SPARC_TLS_GD_CALL:
2754 case elfcpp::R_SPARC_TLS_LDM_HI22:
2755 case elfcpp::R_SPARC_TLS_LDM_LO10:
2756 case elfcpp::R_SPARC_TLS_LDM_ADD:
2757 case elfcpp::R_SPARC_TLS_LDM_CALL:
2758 case elfcpp::R_SPARC_TLS_LDO_HIX22:
2759 case elfcpp::R_SPARC_TLS_LDO_LOX10:
2760 case elfcpp::R_SPARC_TLS_LDO_ADD:
2761 case elfcpp::R_SPARC_TLS_IE_HI22:
2762 case elfcpp::R_SPARC_TLS_IE_LO10:
2763 case elfcpp::R_SPARC_TLS_IE_LD:
2764 case elfcpp::R_SPARC_TLS_IE_LDX:
2765 case elfcpp::R_SPARC_TLS_IE_ADD:
2766 case elfcpp::R_SPARC_TLS_LE_HIX22:
2767 case elfcpp::R_SPARC_TLS_LE_LOX10:
2768 this->relocate_tls(relinfo, target, relnum, rela,
2769 r_type, gsym, psymval, view,
2770 address, view_size);
2771 break;
2772
2773 case elfcpp::R_SPARC_COPY:
2774 case elfcpp::R_SPARC_GLOB_DAT:
2775 case elfcpp::R_SPARC_JMP_SLOT:
2776 case elfcpp::R_SPARC_RELATIVE:
2777 // These are outstanding tls relocs, which are unexpected when
2778 // linking.
2779 case elfcpp::R_SPARC_TLS_DTPMOD64:
2780 case elfcpp::R_SPARC_TLS_DTPMOD32:
2781 case elfcpp::R_SPARC_TLS_TPOFF64:
2782 case elfcpp::R_SPARC_TLS_TPOFF32:
2783 gold_error_at_location(relinfo, relnum, rela.get_r_offset(),
2784 _("unexpected reloc %u in object file"),
2785 r_type);
2786 break;
2787
2788 default:
2789 gold_error_at_location(relinfo, relnum, rela.get_r_offset(),
2790 _("unsupported reloc %u"),
2791 r_type);
2792 break;
2793 }
2794
2795 return true;
2796 }
2797
2798 // Perform a TLS relocation.
2799
2800 template<int size, bool big_endian>
2801 inline void
2802 Target_sparc<size, big_endian>::Relocate::relocate_tls(
2803 const Relocate_info<size, big_endian>* relinfo,
2804 Target_sparc<size, big_endian>* target,
2805 size_t relnum,
2806 const elfcpp::Rela<size, big_endian>& rela,
2807 unsigned int r_type,
2808 const Sized_symbol<size>* gsym,
2809 const Symbol_value<size>* psymval,
2810 unsigned char* view,
2811 typename elfcpp::Elf_types<size>::Elf_Addr address,
2812 section_size_type)
2813 {
2814 Output_segment* tls_segment = relinfo->layout->tls_segment();
2815 typedef Sparc_relocate_functions<size, big_endian> Reloc;
2816 const Sized_relobj<size, big_endian>* object = relinfo->object;
2817 typedef typename elfcpp::Swap<32, true>::Valtype Insntype;
2818
2819 const elfcpp::Elf_Xword addend = rela.get_r_addend();
2820 typename elfcpp::Elf_types<size>::Elf_Addr value = psymval->value(object, 0);
2821
2822 const bool is_final =
2823 (gsym == NULL
2824 ? !parameters->options().output_is_position_independent()
2825 : gsym->final_value_is_known());
2826 const tls::Tls_optimization optimized_type
2827 = optimize_tls_reloc(is_final, r_type);
2828
2829 switch (r_type)
2830 {
2831 case elfcpp::R_SPARC_TLS_GD_HI22:
2832 case elfcpp::R_SPARC_TLS_GD_LO10:
2833 case elfcpp::R_SPARC_TLS_GD_ADD:
2834 case elfcpp::R_SPARC_TLS_GD_CALL:
2835 if (optimized_type == tls::TLSOPT_TO_LE)
2836 {
2837 Insntype* wv = reinterpret_cast<Insntype*>(view);
2838 Insntype val;
2839
2840 value -= tls_segment->memsz();
2841
2842 switch (r_type)
2843 {
2844 case elfcpp::R_SPARC_TLS_GD_HI22:
2845 // TLS_GD_HI22 --> TLS_LE_HIX22
2846 Reloc::hix22(view, value, addend);
2847 break;
2848
2849 case elfcpp::R_SPARC_TLS_GD_LO10:
2850 // TLS_GD_LO10 --> TLS_LE_LOX10
2851 Reloc::lox10(view, value, addend);
2852 break;
2853
2854 case elfcpp::R_SPARC_TLS_GD_ADD:
2855 // add %reg1, %reg2, %reg3 --> mov %g7, %reg2, %reg3
2856 val = elfcpp::Swap<32, true>::readval(wv);
2857 val = (val & ~0x7c000) | 0x1c000;
2858 elfcpp::Swap<32, true>::writeval(wv, val);
2859 break;
2860 case elfcpp::R_SPARC_TLS_GD_CALL:
2861 // call __tls_get_addr --> nop
2862 elfcpp::Swap<32, true>::writeval(wv, sparc_nop);
2863 break;
2864 }
2865 break;
2866 }
2867 else
2868 {
2869 unsigned int got_type = (optimized_type == tls::TLSOPT_TO_IE
2870 ? GOT_TYPE_TLS_OFFSET
2871 : GOT_TYPE_TLS_PAIR);
2872 if (gsym != NULL)
2873 {
2874 gold_assert(gsym->has_got_offset(got_type));
2875 value = gsym->got_offset(got_type);
2876 }
2877 else
2878 {
2879 unsigned int r_sym = elfcpp::elf_r_sym<size>(rela.get_r_info());
2880 gold_assert(object->local_has_got_offset(r_sym, got_type));
2881 value = object->local_got_offset(r_sym, got_type);
2882 }
2883 if (optimized_type == tls::TLSOPT_TO_IE)
2884 {
2885 Insntype* wv = reinterpret_cast<Insntype*>(view);
2886 Insntype val;
2887
2888 switch (r_type)
2889 {
2890 case elfcpp::R_SPARC_TLS_GD_HI22:
2891 // TLS_GD_HI22 --> TLS_IE_HI22
2892 Reloc::hi22(view, value, addend);
2893 break;
2894
2895 case elfcpp::R_SPARC_TLS_GD_LO10:
2896 // TLS_GD_LO10 --> TLS_IE_LO10
2897 Reloc::lo10(view, value, addend);
2898 break;
2899
2900 case elfcpp::R_SPARC_TLS_GD_ADD:
2901 // add %reg1, %reg2, %reg3 --> ld [%reg1 + %reg2], %reg3
2902 val = elfcpp::Swap<32, true>::readval(wv);
2903
2904 if (size == 64)
2905 val |= 0xc0580000;
2906 else
2907 val |= 0xc0000000;
2908
2909 elfcpp::Swap<32, true>::writeval(wv, val);
2910 break;
2911
2912 case elfcpp::R_SPARC_TLS_GD_CALL:
2913 // The compiler can put the TLS_GD_ADD instruction
2914 // into the delay slot of the call. If so, we need
2915 // to transpose the two instructions so that the
2916 // the new sequence works properly.
2917 //
2918 // The test we use is if the instruction in the
2919 // delay slot is an add with destination register
2920 // equal to %o0
2921 val = elfcpp::Swap<32, true>::readval(wv + 1);
2922 if ((val & 0x81f80000) == 0x80000000
2923 && ((val >> 25) & 0x1f) == 0x8)
2924 {
2925 if (size == 64)
2926 val |= 0xc0580000;
2927 else
2928 val |= 0xc0000000;
2929
2930 elfcpp::Swap<32, true>::writeval(wv, val);
2931
2932 wv += 1;
2933 this->ignore_gd_add_ = true;
2934 }
2935
2936 // call __tls_get_addr --> add %g7, %o0, %o0
2937 elfcpp::Swap<32, true>::writeval(wv, 0x9001c008);
2938 break;
2939 }
2940 break;
2941 }
2942 else if (optimized_type == tls::TLSOPT_NONE)
2943 {
2944 switch (r_type)
2945 {
2946 case elfcpp::R_SPARC_TLS_GD_HI22:
2947 Reloc::hi22(view, value, addend);
2948 break;
2949 case elfcpp::R_SPARC_TLS_GD_LO10:
2950 Reloc::lo10(view, value, addend);
2951 break;
2952 case elfcpp::R_SPARC_TLS_GD_ADD:
2953 break;
2954 case elfcpp::R_SPARC_TLS_GD_CALL:
2955 {
2956 Symbol_value<size> symval;
2957 elfcpp::Elf_Xword value;
2958 Symbol* tsym;
2959
2960 tsym = target->tls_get_addr_sym_;
2961 gold_assert(tsym);
2962 value = (target->plt_section()->address() +
2963 tsym->plt_offset());
2964 symval.set_output_value(value);
2965 Reloc::wdisp30(view, object, &symval, addend, address);
2966 }
2967 break;
2968 }
2969 break;
2970 }
2971 }
2972 gold_error_at_location(relinfo, relnum, rela.get_r_offset(),
2973 _("unsupported reloc %u"),
2974 r_type);
2975 break;
2976
2977 case elfcpp::R_SPARC_TLS_LDM_HI22:
2978 case elfcpp::R_SPARC_TLS_LDM_LO10:
2979 case elfcpp::R_SPARC_TLS_LDM_ADD:
2980 case elfcpp::R_SPARC_TLS_LDM_CALL:
2981 if (optimized_type == tls::TLSOPT_TO_LE)
2982 {
2983 Insntype* wv = reinterpret_cast<Insntype*>(view);
2984
2985 switch (r_type)
2986 {
2987 case elfcpp::R_SPARC_TLS_LDM_HI22:
2988 case elfcpp::R_SPARC_TLS_LDM_LO10:
2989 case elfcpp::R_SPARC_TLS_LDM_ADD:
2990 elfcpp::Swap<32, true>::writeval(wv, sparc_nop);
2991 break;
2992
2993 case elfcpp::R_SPARC_TLS_LDM_CALL:
2994 elfcpp::Swap<32, true>::writeval(wv, sparc_mov_g0_o0);
2995 break;
2996 }
2997 break;
2998 }
2999 else if (optimized_type == tls::TLSOPT_NONE)
3000 {
3001 // Relocate the field with the offset of the GOT entry for
3002 // the module index.
3003 unsigned int got_offset;
3004
3005 got_offset = target->got_mod_index_entry(NULL, NULL, NULL);
3006 switch (r_type)
3007 {
3008 case elfcpp::R_SPARC_TLS_LDM_HI22:
3009 Reloc::hi22(view, got_offset, addend);
3010 break;
3011 case elfcpp::R_SPARC_TLS_LDM_LO10:
3012 Reloc::lo10(view, got_offset, addend);
3013 break;
3014 case elfcpp::R_SPARC_TLS_LDM_ADD:
3015 break;
3016 case elfcpp::R_SPARC_TLS_LDM_CALL:
3017 {
3018 Symbol_value<size> symval;
3019 elfcpp::Elf_Xword value;
3020 Symbol* tsym;
3021
3022 tsym = target->tls_get_addr_sym_;
3023 gold_assert(tsym);
3024 value = (target->plt_section()->address() +
3025 tsym->plt_offset());
3026 symval.set_output_value(value);
3027 Reloc::wdisp30(view, object, &symval, addend, address);
3028 }
3029 break;
3030 }
3031 break;
3032 }
3033 gold_error_at_location(relinfo, relnum, rela.get_r_offset(),
3034 _("unsupported reloc %u"),
3035 r_type);
3036 break;
3037
3038 // These relocs can appear in debugging sections, in which case
3039 // we won't see the TLS_LDM relocs. The local_dynamic_type
3040 // field tells us this.
3041 case elfcpp::R_SPARC_TLS_LDO_HIX22:
3042 if (optimized_type == tls::TLSOPT_TO_LE)
3043 {
3044 value -= tls_segment->memsz();
3045 Reloc::hix22(view, value, addend);
3046 }
3047 else
3048 Reloc::ldo_hix22(view, value, addend);
3049 break;
3050 case elfcpp::R_SPARC_TLS_LDO_LOX10:
3051 if (optimized_type == tls::TLSOPT_TO_LE)
3052 {
3053 value -= tls_segment->memsz();
3054 Reloc::lox10(view, value, addend);
3055 }
3056 else
3057 Reloc::ldo_lox10(view, value, addend);
3058 break;
3059 case elfcpp::R_SPARC_TLS_LDO_ADD:
3060 if (optimized_type == tls::TLSOPT_TO_LE)
3061 {
3062 Insntype* wv = reinterpret_cast<Insntype*>(view);
3063 Insntype val;
3064
3065 // add %reg1, %reg2, %reg3 --> add %g7, %reg2, %reg3
3066 val = elfcpp::Swap<32, true>::readval(wv);
3067 val = (val & ~0x7c000) | 0x1c000;
3068 elfcpp::Swap<32, true>::writeval(wv, val);
3069 }
3070 break;
3071
3072 // When optimizing IE --> LE, the only relocation that is handled
3073 // differently is R_SPARC_TLS_IE_LD, it is rewritten from
3074 // 'ld{,x} [rs1 + rs2], rd' into 'mov rs2, rd' or simply a NOP is
3075 // rs2 and rd are the same.
3076 case elfcpp::R_SPARC_TLS_IE_LD:
3077 case elfcpp::R_SPARC_TLS_IE_LDX:
3078 if (optimized_type == tls::TLSOPT_TO_LE)
3079 {
3080 Insntype* wv = reinterpret_cast<Insntype*>(view);
3081 Insntype val = elfcpp::Swap<32, true>::readval(wv);
3082 Insntype rs2 = val & 0x1f;
3083 Insntype rd = (val >> 25) & 0x1f;
3084
3085 if (rs2 == rd)
3086 val = sparc_nop;
3087 else
3088 val = sparc_mov | (val & 0x3e00001f);
3089
3090 elfcpp::Swap<32, true>::writeval(wv, val);
3091 }
3092 break;
3093
3094 case elfcpp::R_SPARC_TLS_IE_HI22:
3095 case elfcpp::R_SPARC_TLS_IE_LO10:
3096 if (optimized_type == tls::TLSOPT_TO_LE)
3097 {
3098 value -= tls_segment->memsz();
3099 switch (r_type)
3100 {
3101 case elfcpp::R_SPARC_TLS_IE_HI22:
3102 // IE_HI22 --> LE_HIX22
3103 Reloc::hix22(view, value, addend);
3104 break;
3105 case elfcpp::R_SPARC_TLS_IE_LO10:
3106 // IE_LO10 --> LE_LOX10
3107 Reloc::lox10(view, value, addend);
3108 break;
3109 }
3110 break;
3111 }
3112 else if (optimized_type == tls::TLSOPT_NONE)
3113 {
3114 // Relocate the field with the offset of the GOT entry for
3115 // the tp-relative offset of the symbol.
3116 if (gsym != NULL)
3117 {
3118 gold_assert(gsym->has_got_offset(GOT_TYPE_TLS_OFFSET));
3119 value = gsym->got_offset(GOT_TYPE_TLS_OFFSET);
3120 }
3121 else
3122 {
3123 unsigned int r_sym = elfcpp::elf_r_sym<size>(rela.get_r_info());
3124 gold_assert(object->local_has_got_offset(r_sym,
3125 GOT_TYPE_TLS_OFFSET));
3126 value = object->local_got_offset(r_sym,
3127 GOT_TYPE_TLS_OFFSET);
3128 }
3129 switch (r_type)
3130 {
3131 case elfcpp::R_SPARC_TLS_IE_HI22:
3132 Reloc::hi22(view, value, addend);
3133 break;
3134 case elfcpp::R_SPARC_TLS_IE_LO10:
3135 Reloc::lo10(view, value, addend);
3136 break;
3137 }
3138 break;
3139 }
3140 gold_error_at_location(relinfo, relnum, rela.get_r_offset(),
3141 _("unsupported reloc %u"),
3142 r_type);
3143 break;
3144
3145 case elfcpp::R_SPARC_TLS_IE_ADD:
3146 // This seems to be mainly so that we can find the addition
3147 // instruction if there is one. There doesn't seem to be any
3148 // actual relocation to apply.
3149 break;
3150
3151 case elfcpp::R_SPARC_TLS_LE_HIX22:
3152 // If we're creating a shared library, a dynamic relocation will
3153 // have been created for this location, so do not apply it now.
3154 if (!parameters->options().shared())
3155 {
3156 value -= tls_segment->memsz();
3157 Reloc::hix22(view, value, addend);
3158 }
3159 break;
3160
3161 case elfcpp::R_SPARC_TLS_LE_LOX10:
3162 // If we're creating a shared library, a dynamic relocation will
3163 // have been created for this location, so do not apply it now.
3164 if (!parameters->options().shared())
3165 {
3166 value -= tls_segment->memsz();
3167 Reloc::lox10(view, value, addend);
3168 }
3169 break;
3170 }
3171 }
3172
3173 // Relocate section data.
3174
3175 template<int size, bool big_endian>
3176 void
3177 Target_sparc<size, big_endian>::relocate_section(
3178 const Relocate_info<size, big_endian>* relinfo,
3179 unsigned int sh_type,
3180 const unsigned char* prelocs,
3181 size_t reloc_count,
3182 Output_section* output_section,
3183 bool needs_special_offset_handling,
3184 unsigned char* view,
3185 typename elfcpp::Elf_types<size>::Elf_Addr address,
3186 section_size_type view_size,
3187 const Reloc_symbol_changes* reloc_symbol_changes)
3188 {
3189 typedef Target_sparc<size, big_endian> Sparc;
3190 typedef typename Target_sparc<size, big_endian>::Relocate Sparc_relocate;
3191
3192 gold_assert(sh_type == elfcpp::SHT_RELA);
3193
3194 gold::relocate_section<size, big_endian, Sparc, elfcpp::SHT_RELA,
3195 Sparc_relocate>(
3196 relinfo,
3197 this,
3198 prelocs,
3199 reloc_count,
3200 output_section,
3201 needs_special_offset_handling,
3202 view,
3203 address,
3204 view_size,
3205 reloc_symbol_changes);
3206 }
3207
3208 // Return the size of a relocation while scanning during a relocatable
3209 // link.
3210
3211 template<int size, bool big_endian>
3212 unsigned int
3213 Target_sparc<size, big_endian>::Relocatable_size_for_reloc::get_size_for_reloc(
3214 unsigned int,
3215 Relobj*)
3216 {
3217 // We are always SHT_RELA, so we should never get here.
3218 gold_unreachable();
3219 return 0;
3220 }
3221
3222 // Scan the relocs during a relocatable link.
3223
3224 template<int size, bool big_endian>
3225 void
3226 Target_sparc<size, big_endian>::scan_relocatable_relocs(
3227 Symbol_table* symtab,
3228 Layout* layout,
3229 Sized_relobj<size, big_endian>* object,
3230 unsigned int data_shndx,
3231 unsigned int sh_type,
3232 const unsigned char* prelocs,
3233 size_t reloc_count,
3234 Output_section* output_section,
3235 bool needs_special_offset_handling,
3236 size_t local_symbol_count,
3237 const unsigned char* plocal_symbols,
3238 Relocatable_relocs* rr)
3239 {
3240 gold_assert(sh_type == elfcpp::SHT_RELA);
3241
3242 typedef gold::Default_scan_relocatable_relocs<elfcpp::SHT_RELA,
3243 Relocatable_size_for_reloc> Scan_relocatable_relocs;
3244
3245 gold::scan_relocatable_relocs<size, big_endian, elfcpp::SHT_RELA,
3246 Scan_relocatable_relocs>(
3247 symtab,
3248 layout,
3249 object,
3250 data_shndx,
3251 prelocs,
3252 reloc_count,
3253 output_section,
3254 needs_special_offset_handling,
3255 local_symbol_count,
3256 plocal_symbols,
3257 rr);
3258 }
3259
3260 // Relocate a section during a relocatable link.
3261
3262 template<int size, bool big_endian>
3263 void
3264 Target_sparc<size, big_endian>::relocate_for_relocatable(
3265 const Relocate_info<size, big_endian>* relinfo,
3266 unsigned int sh_type,
3267 const unsigned char* prelocs,
3268 size_t reloc_count,
3269 Output_section* output_section,
3270 off_t offset_in_output_section,
3271 const Relocatable_relocs* rr,
3272 unsigned char* view,
3273 typename elfcpp::Elf_types<size>::Elf_Addr view_address,
3274 section_size_type view_size,
3275 unsigned char* reloc_view,
3276 section_size_type reloc_view_size)
3277 {
3278 gold_assert(sh_type == elfcpp::SHT_RELA);
3279
3280 gold::relocate_for_relocatable<size, big_endian, elfcpp::SHT_RELA>(
3281 relinfo,
3282 prelocs,
3283 reloc_count,
3284 output_section,
3285 offset_in_output_section,
3286 rr,
3287 view,
3288 view_address,
3289 view_size,
3290 reloc_view,
3291 reloc_view_size);
3292 }
3293
3294 // Return the value to use for a dynamic which requires special
3295 // treatment. This is how we support equality comparisons of function
3296 // pointers across shared library boundaries, as described in the
3297 // processor specific ABI supplement.
3298
3299 template<int size, bool big_endian>
3300 uint64_t
3301 Target_sparc<size, big_endian>::do_dynsym_value(const Symbol* gsym) const
3302 {
3303 gold_assert(gsym->is_from_dynobj() && gsym->has_plt_offset());
3304 return this->plt_section()->address() + gsym->plt_offset();
3305 }
3306
3307 // The selector for sparc object files.
3308
3309 template<int size, bool big_endian>
3310 class Target_selector_sparc : public Target_selector
3311 {
3312 public:
3313 Target_selector_sparc()
3314 : Target_selector(elfcpp::EM_NONE, size, big_endian,
3315 (size == 64 ? "elf64-sparc" : "elf32-sparc"))
3316 { }
3317
3318 Target* do_recognize(int machine, int, int)
3319 {
3320 switch (size)
3321 {
3322 case 64:
3323 if (machine != elfcpp::EM_SPARCV9)
3324 return NULL;
3325 break;
3326
3327 case 32:
3328 if (machine != elfcpp::EM_SPARC
3329 && machine != elfcpp::EM_SPARC32PLUS)
3330 return NULL;
3331 break;
3332
3333 default:
3334 return NULL;
3335 }
3336
3337 return this->instantiate_target();
3338 }
3339
3340 Target* do_instantiate_target()
3341 { return new Target_sparc<size, big_endian>(); }
3342 };
3343
3344 Target_selector_sparc<32, true> target_selector_sparc32;
3345 Target_selector_sparc<64, true> target_selector_sparc64;
3346
3347 } // End anonymous namespace.
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