?  search:
summary | log | graphiclog1 | graphiclog2 | commit | commitdiff | tree | refs | edit | fork
blame | history | raw | HEAD
[PATCH 25/57][Arm][GAS] Add support for MVE instruction: vmvn, vqabs and vqneg
[binutils-gdb.git] / gold / sparc.cc
blobfce72404596407b75df6684e74121f8dd770fd32
1 // sparc.cc -- sparc target support for gold.
2
3 // Copyright (C) 2008-2019 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), rela_ifunc_(NULL),
62 copy_relocs_(elfcpp::R_SPARC_COPY),
63 got_mod_index_offset_(-1U), tls_get_addr_sym_(NULL),
64 elf_machine_(sparc_info.machine_code), elf_flags_(0),
65 elf_flags_set_(false), register_syms_()
66 {
67 }
68
69 // Make a new symbol table entry.
70 Sized_symbol<size>*
71 make_symbol(const char*, elfcpp::STT, Object*, unsigned int, uint64_t);
72
73 // Process the relocations to determine unreferenced sections for
74 // garbage collection.
75 void
76 gc_process_relocs(Symbol_table* symtab,
77 Layout* layout,
78 Sized_relobj_file<size, big_endian>* object,
79 unsigned int data_shndx,
80 unsigned int sh_type,
81 const unsigned char* prelocs,
82 size_t reloc_count,
83 Output_section* output_section,
84 bool needs_special_offset_handling,
85 size_t local_symbol_count,
86 const unsigned char* plocal_symbols);
87
88 // Scan the relocations to look for symbol adjustments.
89 void
90 scan_relocs(Symbol_table* symtab,
91 Layout* layout,
92 Sized_relobj_file<size, big_endian>* object,
93 unsigned int data_shndx,
94 unsigned int sh_type,
95 const unsigned char* prelocs,
96 size_t reloc_count,
97 Output_section* output_section,
98 bool needs_special_offset_handling,
99 size_t local_symbol_count,
100 const unsigned char* plocal_symbols);
101 // Finalize the sections.
102 void
103 do_finalize_sections(Layout*, const Input_objects*, Symbol_table*);
104
105 // Return the value to use for a dynamic which requires special
106 // treatment.
107 uint64_t
108 do_dynsym_value(const Symbol*) const;
109
110 // Relocate a section.
111 void
112 relocate_section(const Relocate_info<size, big_endian>*,
113 unsigned int sh_type,
114 const unsigned char* prelocs,
115 size_t reloc_count,
116 Output_section* output_section,
117 bool needs_special_offset_handling,
118 unsigned char* view,
119 typename elfcpp::Elf_types<size>::Elf_Addr view_address,
120 section_size_type view_size,
121 const Reloc_symbol_changes*);
122
123 // Scan the relocs during a relocatable link.
124 void
125 scan_relocatable_relocs(Symbol_table* symtab,
126 Layout* layout,
127 Sized_relobj_file<size, big_endian>* object,
128 unsigned int data_shndx,
129 unsigned int sh_type,
130 const unsigned char* prelocs,
131 size_t reloc_count,
132 Output_section* output_section,
133 bool needs_special_offset_handling,
134 size_t local_symbol_count,
135 const unsigned char* plocal_symbols,
136 Relocatable_relocs*);
137
138 // Scan the relocs for --emit-relocs.
139 void
140 emit_relocs_scan(Symbol_table* symtab,
141 Layout* layout,
142 Sized_relobj_file<size, big_endian>* object,
143 unsigned int data_shndx,
144 unsigned int sh_type,
145 const unsigned char* prelocs,
146 size_t reloc_count,
147 Output_section* output_section,
148 bool needs_special_offset_handling,
149 size_t local_symbol_count,
150 const unsigned char* plocal_syms,
151 Relocatable_relocs* rr);
152
153 // Emit relocations for a section.
154 void
155 relocate_relocs(const Relocate_info<size, big_endian>*,
156 unsigned int sh_type,
157 const unsigned char* prelocs,
158 size_t reloc_count,
159 Output_section* output_section,
160 typename elfcpp::Elf_types<size>::Elf_Off
161 offset_in_output_section,
162 unsigned char* view,
163 typename elfcpp::Elf_types<size>::Elf_Addr view_address,
164 section_size_type view_size,
165 unsigned char* reloc_view,
166 section_size_type reloc_view_size);
167
168 // Return whether SYM is defined by the ABI.
169 bool
170 do_is_defined_by_abi(const Symbol* sym) const
171 { return strcmp(sym->name(), "___tls_get_addr") == 0; }
172
173 // Return the PLT address to use for a global symbol.
174 uint64_t
175 do_plt_address_for_global(const Symbol* gsym) const
176 { return this->plt_section()->address_for_global(gsym); }
177
178 uint64_t
179 do_plt_address_for_local(const Relobj* relobj, unsigned int symndx) const
180 { return this->plt_section()->address_for_local(relobj, symndx); }
181
182 // Return whether there is a GOT section.
183 bool
184 has_got_section() const
185 { return this->got_ != NULL; }
186
187 // Return the size of the GOT section.
188 section_size_type
189 got_size() const
190 {
191 gold_assert(this->got_ != NULL);
192 return this->got_->data_size();
193 }
194
195 // Return the number of entries in the GOT.
196 unsigned int
197 got_entry_count() const
198 {
199 if (this->got_ == NULL)
200 return 0;
201 return this->got_size() / (size / 8);
202 }
203
204 // Return the address of the GOT.
205 uint64_t
206 got_address() const
207 {
208 if (this->got_ == NULL)
209 return 0;
210 return this->got_->address();
211 }
212
213 // Return the number of entries in the PLT.
214 unsigned int
215 plt_entry_count() const;
216
217 // Return the offset of the first non-reserved PLT entry.
218 unsigned int
219 first_plt_entry_offset() const;
220
221 // Return the size of each PLT entry.
222 unsigned int
223 plt_entry_size() const;
224
225 protected:
226 // Make an ELF object.
227 Object*
228 do_make_elf_object(const std::string&, Input_file*, off_t,
229 const elfcpp::Ehdr<size, big_endian>& ehdr);
230
231 void
232 do_adjust_elf_header(unsigned char* view, int len);
233
234 private:
235
236 // The class which scans relocations.
237 class Scan
238 {
239 public:
240 Scan()
241 : issued_non_pic_error_(false)
242 { }
243
244 static inline int
245 get_reference_flags(unsigned int r_type);
246
247 inline void
248 local(Symbol_table* symtab, Layout* layout, Target_sparc* target,
249 Sized_relobj_file<size, big_endian>* object,
250 unsigned int data_shndx,
251 Output_section* output_section,
252 const elfcpp::Rela<size, big_endian>& reloc, unsigned int r_type,
253 const elfcpp::Sym<size, big_endian>& lsym,
254 bool is_discarded);
255
256 inline void
257 global(Symbol_table* symtab, Layout* layout, Target_sparc* target,
258 Sized_relobj_file<size, big_endian>* object,
259 unsigned int data_shndx,
260 Output_section* output_section,
261 const elfcpp::Rela<size, big_endian>& reloc, unsigned int r_type,
262 Symbol* gsym);
263
264 inline bool
265 local_reloc_may_be_function_pointer(Symbol_table* , Layout* ,
266 Target_sparc* ,
267 Sized_relobj_file<size, big_endian>* ,
268 unsigned int ,
269 Output_section* ,
270 const elfcpp::Rela<size, big_endian>& ,
271 unsigned int ,
272 const elfcpp::Sym<size, big_endian>&)
273 { return false; }
274
275 inline bool
276 global_reloc_may_be_function_pointer(Symbol_table* , Layout* ,
277 Target_sparc* ,
278 Sized_relobj_file<size, big_endian>* ,
279 unsigned int ,
280 Output_section* ,
281 const elfcpp::Rela<size,
282 big_endian>& ,
283 unsigned int , Symbol*)
284 { return false; }
285
286
287 private:
288 static void
289 unsupported_reloc_local(Sized_relobj_file<size, big_endian>*,
290 unsigned int r_type);
291
292 static void
293 unsupported_reloc_global(Sized_relobj_file<size, big_endian>*,
294 unsigned int r_type, Symbol*);
295
296 static void
297 generate_tls_call(Symbol_table* symtab, Layout* layout,
298 Target_sparc* target);
299
300 void
301 check_non_pic(Relobj*, unsigned int r_type);
302
303 bool
304 reloc_needs_plt_for_ifunc(Sized_relobj_file<size, big_endian>*,
305 unsigned int r_type);
306
307 // Whether we have issued an error about a non-PIC compilation.
308 bool issued_non_pic_error_;
309 };
310
311 // The class which implements relocation.
312 class Relocate
313 {
314 public:
315 Relocate()
316 : ignore_gd_add_(false), reloc_adjust_addr_(NULL)
317 { }
318
319 ~Relocate()
320 {
321 if (this->ignore_gd_add_)
322 {
323 // FIXME: This needs to specify the location somehow.
324 gold_error(_("missing expected TLS relocation"));
325 }
326 }
327
328 // Do a relocation. Return false if the caller should not issue
329 // any warnings about this relocation.
330 inline bool
331 relocate(const Relocate_info<size, big_endian>*, unsigned int,
332 Target_sparc*, Output_section*, size_t, const unsigned char*,
333 const Sized_symbol<size>*, const Symbol_value<size>*,
334 unsigned char*, typename elfcpp::Elf_types<size>::Elf_Addr,
335 section_size_type);
336
337 private:
338 // Do a TLS relocation.
339 inline void
340 relocate_tls(const Relocate_info<size, big_endian>*, Target_sparc* target,
341 size_t relnum, const elfcpp::Rela<size, big_endian>&,
342 unsigned int r_type, const Sized_symbol<size>*,
343 const Symbol_value<size>*,
344 unsigned char*,
345 typename elfcpp::Elf_types<size>::Elf_Addr,
346 section_size_type);
347
348 inline void
349 relax_call(Target_sparc<size, big_endian>* target,
350 unsigned char* view,
351 const elfcpp::Rela<size, big_endian>& rela,
352 section_size_type view_size);
353
354 // Ignore the next relocation which should be R_SPARC_TLS_GD_ADD
355 bool ignore_gd_add_;
356
357 // If we hit a reloc at this view address, adjust it back by 4 bytes.
358 unsigned char *reloc_adjust_addr_;
359 };
360
361 // Get the GOT section, creating it if necessary.
362 Output_data_got<size, big_endian>*
363 got_section(Symbol_table*, Layout*);
364
365 // Create the PLT section.
366 void
367 make_plt_section(Symbol_table* symtab, Layout* layout);
368
369 // Create a PLT entry for a global symbol.
370 void
371 make_plt_entry(Symbol_table*, Layout*, Symbol*);
372
373 // Create a PLT entry for a local STT_GNU_IFUNC symbol.
374 void
375 make_local_ifunc_plt_entry(Symbol_table*, Layout*,
376 Sized_relobj_file<size, big_endian>* relobj,
377 unsigned int local_sym_index);
378
379 // Create a GOT entry for the TLS module index.
380 unsigned int
381 got_mod_index_entry(Symbol_table* symtab, Layout* layout,
382 Sized_relobj_file<size, big_endian>* object);
383
384 // Return the gsym for "__tls_get_addr". Cache if not already
385 // cached.
386 Symbol*
387 tls_get_addr_sym(Symbol_table* symtab)
388 {
389 if (!this->tls_get_addr_sym_)
390 this->tls_get_addr_sym_ = symtab->lookup("__tls_get_addr", NULL);
391 gold_assert(this->tls_get_addr_sym_);
392 return this->tls_get_addr_sym_;
393 }
394
395 // Get the PLT section.
396 Output_data_plt_sparc<size, big_endian>*
397 plt_section() const
398 {
399 gold_assert(this->plt_ != NULL);
400 return this->plt_;
401 }
402
403 // Get the dynamic reloc section, creating it if necessary.
404 Reloc_section*
405 rela_dyn_section(Layout*);
406
407 // Get the section to use for IFUNC relocations.
408 Reloc_section*
409 rela_ifunc_section(Layout*);
410
411 // Copy a relocation against a global symbol.
412 void
413 copy_reloc(Symbol_table* symtab, Layout* layout,
414 Sized_relobj_file<size, big_endian>* object,
415 unsigned int shndx, Output_section* output_section,
416 Symbol* sym, const elfcpp::Rela<size, big_endian>& reloc)
417 {
418 unsigned int r_type = elfcpp::elf_r_type<size>(reloc.get_r_info());
419 this->copy_relocs_.copy_reloc(symtab, layout,
420 symtab->get_sized_symbol<size>(sym),
421 object, shndx, output_section,
422 r_type, reloc.get_r_offset(),
423 reloc.get_r_addend(),
424 this->rela_dyn_section(layout));
425 }
426
427 // Information about this specific target which we pass to the
428 // general Target structure.
429 static Target::Target_info sparc_info;
430
431 // The types of GOT entries needed for this platform.
432 // These values are exposed to the ABI in an incremental link.
433 // Do not renumber existing values without changing the version
434 // number of the .gnu_incremental_inputs section.
435 enum Got_type
436 {
437 GOT_TYPE_STANDARD = 0, // GOT entry for a regular symbol
438 GOT_TYPE_TLS_OFFSET = 1, // GOT entry for TLS offset
439 GOT_TYPE_TLS_PAIR = 2, // GOT entry for TLS module/offset pair
440 };
441
442 struct Register_symbol
443 {
444 Register_symbol()
445 : name(NULL), shndx(0), obj(NULL)
446 { }
447 const char* name;
448 unsigned int shndx;
449 Object* obj;
450 };
451
452 // The GOT section.
453 Output_data_got<size, big_endian>* got_;
454 // The PLT section.
455 Output_data_plt_sparc<size, big_endian>* plt_;
456 // The dynamic reloc section.
457 Reloc_section* rela_dyn_;
458 // The section to use for IFUNC relocs.
459 Reloc_section* rela_ifunc_;
460 // Relocs saved to avoid a COPY reloc.
461 Copy_relocs<elfcpp::SHT_RELA, size, big_endian> copy_relocs_;
462 // Offset of the GOT entry for the TLS module index;
463 unsigned int got_mod_index_offset_;
464 // Cached pointer to __tls_get_addr symbol
465 Symbol* tls_get_addr_sym_;
466 // Accumulated elf machine type
467 elfcpp::Elf_Half elf_machine_;
468 // Accumulated elf header flags
469 elfcpp::Elf_Word elf_flags_;
470 // Whether elf_flags_ has been set for the first time yet
471 bool elf_flags_set_;
472 // STT_SPARC_REGISTER symbols (%g2, %g3, %g6, %g7).
473 Register_symbol register_syms_[4];
474 };
475
476 template<>
477 Target::Target_info Target_sparc<32, true>::sparc_info =
478 {
479 32, // size
480 true, // is_big_endian
481 elfcpp::EM_SPARC, // machine_code
482 false, // has_make_symbol
483 false, // has_resolve
484 false, // has_code_fill
485 true, // is_default_stack_executable
486 false, // can_icf_inline_merge_sections
487 '\0', // wrap_char
488 "/usr/lib/ld.so.1", // dynamic_linker
489 0x00010000, // default_text_segment_address
490 64 * 1024, // abi_pagesize (overridable by -z max-page-size)
491 8 * 1024, // common_pagesize (overridable by -z common-page-size)
492 false, // isolate_execinstr
493 0, // rosegment_gap
494 elfcpp::SHN_UNDEF, // small_common_shndx
495 elfcpp::SHN_UNDEF, // large_common_shndx
496 0, // small_common_section_flags
497 0, // large_common_section_flags
498 NULL, // attributes_section
499 NULL, // attributes_vendor
500 "_start", // entry_symbol_name
501 32, // hash_entry_size
502 elfcpp::SHT_PROGBITS, // unwind_section_type
503 };
504
505 template<>
506 Target::Target_info Target_sparc<64, true>::sparc_info =
507 {
508 64, // size
509 true, // is_big_endian
510 elfcpp::EM_SPARCV9, // machine_code
511 true, // has_make_symbol
512 false, // has_resolve
513 false, // has_code_fill
514 true, // is_default_stack_executable
515 false, // can_icf_inline_merge_sections
516 '\0', // wrap_char
517 "/usr/lib/sparcv9/ld.so.1", // dynamic_linker
518 0x100000, // default_text_segment_address
519 64 * 1024, // abi_pagesize (overridable by -z max-page-size)
520 8 * 1024, // common_pagesize (overridable by -z common-page-size)
521 false, // isolate_execinstr
522 0, // rosegment_gap
523 elfcpp::SHN_UNDEF, // small_common_shndx
524 elfcpp::SHN_UNDEF, // large_common_shndx
525 0, // small_common_section_flags
526 0, // large_common_section_flags
527 NULL, // attributes_section
528 NULL, // attributes_vendor
529 "_start", // entry_symbol_name
530 32, // hash_entry_size
531 elfcpp::SHT_PROGBITS, // unwind_section_type
532 };
533
534 // We have to take care here, even when operating in little-endian
535 // mode, sparc instructions are still big endian.
536 template<int size, bool big_endian>
537 class Sparc_relocate_functions
538 {
539 private:
540 // Do a simple relocation with the addend in the relocation.
541 template<int valsize>
542 static inline void
543 rela(unsigned char* view,
544 unsigned int right_shift,
545 typename elfcpp::Elf_types<valsize>::Elf_Addr dst_mask,
546 typename elfcpp::Swap<size, big_endian>::Valtype value,
547 typename elfcpp::Swap<size, big_endian>::Valtype addend)
548 {
549 typedef typename elfcpp::Swap<valsize, big_endian>::Valtype Valtype;
550 Valtype* wv = reinterpret_cast<Valtype*>(view);
551 Valtype val = elfcpp::Swap<valsize, big_endian>::readval(wv);
552 Valtype reloc = ((value + addend) >> right_shift);
553
554 val &= ~dst_mask;
555 reloc &= dst_mask;
556
557 elfcpp::Swap<valsize, big_endian>::writeval(wv, val | reloc);
558 }
559
560 // Do a simple relocation using a symbol value with the addend in
561 // the relocation.
562 template<int valsize>
563 static inline void
564 rela(unsigned char* view,
565 unsigned int right_shift,
566 typename elfcpp::Elf_types<valsize>::Elf_Addr dst_mask,
567 const Sized_relobj_file<size, big_endian>* object,
568 const Symbol_value<size>* psymval,
569 typename elfcpp::Swap<valsize, big_endian>::Valtype addend)
570 {
571 typedef typename elfcpp::Swap<valsize, big_endian>::Valtype Valtype;
572 Valtype* wv = reinterpret_cast<Valtype*>(view);
573 Valtype val = elfcpp::Swap<valsize, big_endian>::readval(wv);
574 Valtype reloc = (psymval->value(object, addend) >> right_shift);
575
576 val &= ~dst_mask;
577 reloc &= dst_mask;
578
579 elfcpp::Swap<valsize, big_endian>::writeval(wv, val | reloc);
580 }
581
582 // Do a simple relocation using a symbol value with the addend in
583 // the relocation, unaligned.
584 template<int valsize>
585 static inline void
586 rela_ua(unsigned char* view,
587 unsigned int right_shift, elfcpp::Elf_Xword dst_mask,
588 const Sized_relobj_file<size, big_endian>* object,
589 const Symbol_value<size>* psymval,
590 typename elfcpp::Swap<size, big_endian>::Valtype addend)
591 {
592 typedef typename elfcpp::Swap_unaligned<valsize,
593 big_endian>::Valtype Valtype;
594 unsigned char* wv = view;
595 Valtype val = elfcpp::Swap_unaligned<valsize, big_endian>::readval(wv);
596 Valtype reloc = (psymval->value(object, addend) >> right_shift);
597
598 val &= ~dst_mask;
599 reloc &= dst_mask;
600
601 elfcpp::Swap_unaligned<valsize, big_endian>::writeval(wv, val | reloc);
602 }
603
604 // Do a simple PC relative relocation with a Symbol_value with the
605 // addend in the relocation.
606 template<int valsize>
607 static inline void
608 pcrela(unsigned char* view,
609 unsigned int right_shift,
610 typename elfcpp::Elf_types<valsize>::Elf_Addr dst_mask,
611 const Sized_relobj_file<size, big_endian>* object,
612 const Symbol_value<size>* psymval,
613 typename elfcpp::Swap<size, big_endian>::Valtype addend,
614 typename elfcpp::Elf_types<size>::Elf_Addr address)
615 {
616 typedef typename elfcpp::Swap<valsize, big_endian>::Valtype Valtype;
617 Valtype* wv = reinterpret_cast<Valtype*>(view);
618 Valtype val = elfcpp::Swap<valsize, big_endian>::readval(wv);
619 Valtype reloc = ((psymval->value(object, addend) - address)
620 >> right_shift);
621
622 val &= ~dst_mask;
623 reloc &= dst_mask;
624
625 elfcpp::Swap<valsize, big_endian>::writeval(wv, val | reloc);
626 }
627
628 template<int valsize>
629 static inline void
630 pcrela_unaligned(unsigned char* view,
631 const Sized_relobj_file<size, big_endian>* object,
632 const Symbol_value<size>* psymval,
633 typename elfcpp::Swap<size, big_endian>::Valtype addend,
634 typename elfcpp::Elf_types<size>::Elf_Addr address)
635 {
636 typedef typename elfcpp::Swap_unaligned<valsize,
637 big_endian>::Valtype Valtype;
638 unsigned char* wv = view;
639 Valtype reloc = (psymval->value(object, addend) - address);
640
641 elfcpp::Swap_unaligned<valsize, big_endian>::writeval(wv, reloc);
642 }
643
644 typedef Sparc_relocate_functions<size, big_endian> This;
645 typedef Sparc_relocate_functions<size, true> This_insn;
646
647 public:
648 // R_SPARC_WDISP30: (Symbol + Addend - Address) >> 2
649 static inline void
650 wdisp30(unsigned char* view,
651 const Sized_relobj_file<size, big_endian>* object,
652 const Symbol_value<size>* psymval,
653 typename elfcpp::Elf_types<size>::Elf_Addr addend,
654 typename elfcpp::Elf_types<size>::Elf_Addr address)
655 {
656 This_insn::template pcrela<32>(view, 2, 0x3fffffff, object,
657 psymval, addend, address);
658 }
659
660 // R_SPARC_WDISP22: (Symbol + Addend - Address) >> 2
661 static inline void
662 wdisp22(unsigned char* view,
663 const Sized_relobj_file<size, big_endian>* object,
664 const Symbol_value<size>* psymval,
665 typename elfcpp::Elf_types<size>::Elf_Addr addend,
666 typename elfcpp::Elf_types<size>::Elf_Addr address)
667 {
668 This_insn::template pcrela<32>(view, 2, 0x003fffff, object,
669 psymval, addend, address);
670 }
671
672 // R_SPARC_WDISP19: (Symbol + Addend - Address) >> 2
673 static inline void
674 wdisp19(unsigned char* view,
675 const Sized_relobj_file<size, big_endian>* object,
676 const Symbol_value<size>* psymval,
677 typename elfcpp::Elf_types<size>::Elf_Addr addend,
678 typename elfcpp::Elf_types<size>::Elf_Addr address)
679 {
680 This_insn::template pcrela<32>(view, 2, 0x0007ffff, object,
681 psymval, addend, address);
682 }
683
684 // R_SPARC_WDISP16: (Symbol + Addend - Address) >> 2
685 static inline void
686 wdisp16(unsigned char* view,
687 const Sized_relobj_file<size, big_endian>* object,
688 const Symbol_value<size>* psymval,
689 typename elfcpp::Elf_types<size>::Elf_Addr addend,
690 typename elfcpp::Elf_types<size>::Elf_Addr address)
691 {
692 typedef typename elfcpp::Swap<32, true>::Valtype Valtype;
693 Valtype* wv = reinterpret_cast<Valtype*>(view);
694 Valtype val = elfcpp::Swap<32, true>::readval(wv);
695 Valtype reloc = ((psymval->value(object, addend) - address)
696 >> 2);
697
698 // The relocation value is split between the low 14 bits,
699 // and bits 20-21.
700 val &= ~((0x3 << 20) | 0x3fff);
701 reloc = (((reloc & 0xc000) << (20 - 14))
702 | (reloc & 0x3ffff));
703
704 elfcpp::Swap<32, true>::writeval(wv, val | reloc);
705 }
706
707 // R_SPARC_WDISP10: (Symbol + Addend - Address) >> 2
708 static inline void
709 wdisp10(unsigned char* view,
710 const Sized_relobj_file<size, big_endian>* object,
711 const Symbol_value<size>* psymval,
712 typename elfcpp::Elf_types<size>::Elf_Addr addend,
713 typename elfcpp::Elf_types<size>::Elf_Addr address)
714 {
715 typedef typename elfcpp::Swap<32, true>::Valtype Valtype;
716 Valtype* wv = reinterpret_cast<Valtype*>(view);
717 Valtype val = elfcpp::Swap<32, true>::readval(wv);
718 Valtype reloc = ((psymval->value(object, addend) - address)
719 >> 2);
720
721 // The relocation value is split between the low bits 5-12,
722 // and high bits 19-20.
723 val &= ~((0x3 << 19) | (0xff << 5));
724 reloc = (((reloc & 0x300) << (19 - 8))
725 | ((reloc & 0xff) << (5 - 0)));
726
727 elfcpp::Swap<32, true>::writeval(wv, val | reloc);
728 }
729
730 // R_SPARC_PC22: (Symbol + Addend - Address) >> 10
731 static inline void
732 pc22(unsigned char* view,
733 const Sized_relobj_file<size, big_endian>* object,
734 const Symbol_value<size>* psymval,
735 typename elfcpp::Elf_types<size>::Elf_Addr addend,
736 typename elfcpp::Elf_types<size>::Elf_Addr address)
737 {
738 This_insn::template pcrela<32>(view, 10, 0x003fffff, object,
739 psymval, addend, address);
740 }
741
742 // R_SPARC_PC10: (Symbol + Addend - Address) & 0x3ff
743 static inline void
744 pc10(unsigned char* view,
745 const Sized_relobj_file<size, big_endian>* object,
746 const Symbol_value<size>* psymval,
747 typename elfcpp::Elf_types<size>::Elf_Addr addend,
748 typename elfcpp::Elf_types<size>::Elf_Addr address)
749 {
750 This_insn::template pcrela<32>(view, 0, 0x000003ff, object,
751 psymval, addend, address);
752 }
753
754 // R_SPARC_HI22: (Symbol + Addend) >> 10
755 static inline void
756 hi22(unsigned char* view,
757 typename elfcpp::Elf_types<size>::Elf_Addr value,
758 typename elfcpp::Elf_types<size>::Elf_Addr addend)
759 {
760 This_insn::template rela<32>(view, 10, 0x003fffff, value, addend);
761 }
762
763 // R_SPARC_HI22: (Symbol + Addend) >> 10
764 static inline void
765 hi22(unsigned char* view,
766 const Sized_relobj_file<size, big_endian>* object,
767 const Symbol_value<size>* psymval,
768 typename elfcpp::Elf_types<size>::Elf_Addr addend)
769 {
770 This_insn::template rela<32>(view, 10, 0x003fffff, object, psymval, addend);
771 }
772
773 // R_SPARC_PCPLT22: (Symbol + Addend - Address) >> 10
774 static inline void
775 pcplt22(unsigned char* view,
776 const Sized_relobj_file<size, big_endian>* object,
777 const Symbol_value<size>* psymval,
778 typename elfcpp::Elf_types<size>::Elf_Addr addend,
779 typename elfcpp::Elf_types<size>::Elf_Addr address)
780 {
781 This_insn::template pcrela<32>(view, 10, 0x003fffff, object,
782 psymval, addend, address);
783 }
784
785 // R_SPARC_LO10: (Symbol + Addend) & 0x3ff
786 static inline void
787 lo10(unsigned char* view,
788 typename elfcpp::Elf_types<size>::Elf_Addr value,
789 typename elfcpp::Elf_types<size>::Elf_Addr addend)
790 {
791 This_insn::template rela<32>(view, 0, 0x000003ff, value, addend);
792 }
793
794 // R_SPARC_LO10: (Symbol + Addend) & 0x3ff
795 static inline void
796 lo10(unsigned char* view,
797 const Sized_relobj_file<size, big_endian>* object,
798 const Symbol_value<size>* psymval,
799 typename elfcpp::Elf_types<size>::Elf_Addr addend)
800 {
801 This_insn::template rela<32>(view, 0, 0x000003ff, object, psymval, addend);
802 }
803
804 // R_SPARC_LO10: (Symbol + Addend) & 0x3ff
805 static inline void
806 lo10(unsigned char* view,
807 const Sized_relobj_file<size, big_endian>* object,
808 const Symbol_value<size>* psymval,
809 typename elfcpp::Elf_types<size>::Elf_Addr addend,
810 typename elfcpp::Elf_types<size>::Elf_Addr address)
811 {
812 This_insn::template pcrela<32>(view, 0, 0x000003ff, object,
813 psymval, addend, address);
814 }
815
816 // R_SPARC_OLO10: ((Symbol + Addend) & 0x3ff) + Addend2
817 static inline void
818 olo10(unsigned char* view,
819 const Sized_relobj_file<size, big_endian>* object,
820 const Symbol_value<size>* psymval,
821 typename elfcpp::Elf_types<size>::Elf_Addr addend,
822 typename elfcpp::Elf_types<size>::Elf_Addr addend2)
823 {
824 typedef typename elfcpp::Swap<32, true>::Valtype Valtype;
825 Valtype* wv = reinterpret_cast<Valtype*>(view);
826 Valtype val = elfcpp::Swap<32, true>::readval(wv);
827 Valtype reloc = psymval->value(object, addend);
828
829 val &= ~0x1fff;
830 reloc &= 0x3ff;
831 reloc += addend2;
832 reloc &= 0x1fff;
833
834 elfcpp::Swap<32, true>::writeval(wv, val | reloc);
835 }
836
837 // R_SPARC_22: (Symbol + Addend)
838 static inline void
839 rela32_22(unsigned char* view,
840 const Sized_relobj_file<size, big_endian>* object,
841 const Symbol_value<size>* psymval,
842 typename elfcpp::Elf_types<size>::Elf_Addr addend)
843 {
844 This_insn::template rela<32>(view, 0, 0x003fffff, object, psymval, addend);
845 }
846
847 // R_SPARC_13: (Symbol + Addend)
848 static inline void
849 rela32_13(unsigned char* view,
850 typename elfcpp::Elf_types<size>::Elf_Addr value,
851 typename elfcpp::Elf_types<size>::Elf_Addr addend)
852 {
853 This_insn::template rela<32>(view, 0, 0x00001fff, value, addend);
854 }
855
856 // R_SPARC_13: (Symbol + Addend)
857 static inline void
858 rela32_13(unsigned char* view,
859 const Sized_relobj_file<size, big_endian>* object,
860 const Symbol_value<size>* psymval,
861 typename elfcpp::Elf_types<size>::Elf_Addr addend)
862 {
863 This_insn::template rela<32>(view, 0, 0x00001fff, object, psymval, addend);
864 }
865
866 // R_SPARC_UA16: (Symbol + Addend)
867 static inline void
868 ua16(unsigned char* view,
869 const Sized_relobj_file<size, big_endian>* object,
870 const Symbol_value<size>* psymval,
871 typename elfcpp::Elf_types<size>::Elf_Addr addend)
872 {
873 This::template rela_ua<16>(view, 0, 0xffff, object, psymval, addend);
874 }
875
876 // R_SPARC_UA32: (Symbol + Addend)
877 static inline void
878 ua32(unsigned char* view,
879 const Sized_relobj_file<size, big_endian>* object,
880 const Symbol_value<size>* psymval,
881 typename elfcpp::Elf_types<size>::Elf_Addr addend)
882 {
883 This::template rela_ua<32>(view, 0, 0xffffffff, object, psymval, addend);
884 }
885
886 // R_SPARC_UA64: (Symbol + Addend)
887 static inline void
888 ua64(unsigned char* view,
889 const Sized_relobj_file<size, big_endian>* object,
890 const Symbol_value<size>* psymval,
891 typename elfcpp::Elf_types<size>::Elf_Addr addend)
892 {
893 This::template rela_ua<64>(view, 0, ~(elfcpp::Elf_Xword) 0,
894 object, psymval, addend);
895 }
896
897 // R_SPARC_DISP8: (Symbol + Addend - Address)
898 static inline void
899 disp8(unsigned char* view,
900 const Sized_relobj_file<size, big_endian>* object,
901 const Symbol_value<size>* psymval,
902 typename elfcpp::Elf_types<size>::Elf_Addr addend,
903 typename elfcpp::Elf_types<size>::Elf_Addr address)
904 {
905 This::template pcrela_unaligned<8>(view, object, psymval,
906 addend, address);
907 }
908
909 // R_SPARC_DISP16: (Symbol + Addend - Address)
910 static inline void
911 disp16(unsigned char* view,
912 const Sized_relobj_file<size, big_endian>* object,
913 const Symbol_value<size>* psymval,
914 typename elfcpp::Elf_types<size>::Elf_Addr addend,
915 typename elfcpp::Elf_types<size>::Elf_Addr address)
916 {
917 This::template pcrela_unaligned<16>(view, object, psymval,
918 addend, address);
919 }
920
921 // R_SPARC_DISP32: (Symbol + Addend - Address)
922 static inline void
923 disp32(unsigned char* view,
924 const Sized_relobj_file<size, big_endian>* object,
925 const Symbol_value<size>* psymval,
926 typename elfcpp::Elf_types<size>::Elf_Addr addend,
927 typename elfcpp::Elf_types<size>::Elf_Addr address)
928 {
929 This::template pcrela_unaligned<32>(view, object, psymval,
930 addend, address);
931 }
932
933 // R_SPARC_DISP64: (Symbol + Addend - Address)
934 static inline void
935 disp64(unsigned char* view,
936 const Sized_relobj_file<size, big_endian>* object,
937 const Symbol_value<size>* psymval,
938 elfcpp::Elf_Xword addend,
939 typename elfcpp::Elf_types<size>::Elf_Addr address)
940 {
941 This::template pcrela_unaligned<64>(view, object, psymval,
942 addend, address);
943 }
944
945 // R_SPARC_H34: (Symbol + Addend) >> 12
946 static inline void
947 h34(unsigned char* view,
948 const Sized_relobj_file<size, big_endian>* object,
949 const Symbol_value<size>* psymval,
950 typename elfcpp::Elf_types<size>::Elf_Addr addend)
951 {
952 This_insn::template rela<32>(view, 12, 0x003fffff, object, psymval, addend);
953 }
954
955 // R_SPARC_H44: (Symbol + Addend) >> 22
956 static inline void
957 h44(unsigned char* view,
958 const Sized_relobj_file<size, big_endian>* object,
959 const Symbol_value<size>* psymval,
960 typename elfcpp::Elf_types<size>::Elf_Addr addend)
961 {
962 This_insn::template rela<32>(view, 22, 0x003fffff, object, psymval, addend);
963 }
964
965 // R_SPARC_M44: ((Symbol + Addend) >> 12) & 0x3ff
966 static inline void
967 m44(unsigned char* view,
968 const Sized_relobj_file<size, big_endian>* object,
969 const Symbol_value<size>* psymval,
970 typename elfcpp::Elf_types<size>::Elf_Addr addend)
971 {
972 This_insn::template rela<32>(view, 12, 0x000003ff, object, psymval, addend);
973 }
974
975 // R_SPARC_L44: (Symbol + Addend) & 0xfff
976 static inline void
977 l44(unsigned char* view,
978 const Sized_relobj_file<size, big_endian>* object,
979 const Symbol_value<size>* psymval,
980 typename elfcpp::Elf_types<size>::Elf_Addr addend)
981 {
982 This_insn::template rela<32>(view, 0, 0x00000fff, object, psymval, addend);
983 }
984
985 // R_SPARC_HH22: (Symbol + Addend) >> 42
986 static inline void
987 hh22(unsigned char* view,
988 const Sized_relobj_file<size, big_endian>* object,
989 const Symbol_value<size>* psymval,
990 typename elfcpp::Elf_types<size>::Elf_Addr addend)
991 {
992 This_insn::template rela<32>(view, 42, 0x003fffff, object, psymval, addend);
993 }
994
995 // R_SPARC_PC_HH22: (Symbol + Addend - Address) >> 42
996 static inline void
997 pc_hh22(unsigned char* view,
998 const Sized_relobj_file<size, big_endian>* object,
999 const Symbol_value<size>* psymval,
1000 typename elfcpp::Elf_types<size>::Elf_Addr addend,
1001 typename elfcpp::Elf_types<size>::Elf_Addr address)
1002 {
1003 This_insn::template pcrela<32>(view, 42, 0x003fffff, object,
1004 psymval, addend, address);
1005 }
1006
1007 // R_SPARC_HM10: ((Symbol + Addend) >> 32) & 0x3ff
1008 static inline void
1009 hm10(unsigned char* view,
1010 const Sized_relobj_file<size, big_endian>* object,
1011 const Symbol_value<size>* psymval,
1012 typename elfcpp::Elf_types<size>::Elf_Addr addend)
1013 {
1014 This_insn::template rela<32>(view, 32, 0x000003ff, object, psymval, addend);
1015 }
1016
1017 // R_SPARC_PC_HM10: ((Symbol + Addend - Address) >> 32) & 0x3ff
1018 static inline void
1019 pc_hm10(unsigned char* view,
1020 const Sized_relobj_file<size, big_endian>* object,
1021 const Symbol_value<size>* psymval,
1022 typename elfcpp::Elf_types<size>::Elf_Addr addend,
1023 typename elfcpp::Elf_types<size>::Elf_Addr address)
1024 {
1025 This_insn::template pcrela<32>(view, 32, 0x000003ff, object,
1026 psymval, addend, address);
1027 }
1028
1029 // R_SPARC_11: (Symbol + Addend)
1030 static inline void
1031 rela32_11(unsigned char* view,
1032 const Sized_relobj_file<size, big_endian>* object,
1033 const Symbol_value<size>* psymval,
1034 typename elfcpp::Elf_types<size>::Elf_Addr addend)
1035 {
1036 This_insn::template rela<32>(view, 0, 0x000007ff, object, psymval, addend);
1037 }
1038
1039 // R_SPARC_10: (Symbol + Addend)
1040 static inline void
1041 rela32_10(unsigned char* view,
1042 const Sized_relobj_file<size, big_endian>* object,
1043 const Symbol_value<size>* psymval,
1044 typename elfcpp::Elf_types<size>::Elf_Addr addend)
1045 {
1046 This_insn::template rela<32>(view, 0, 0x000003ff, object, psymval, addend);
1047 }
1048
1049 // R_SPARC_7: (Symbol + Addend)
1050 static inline void
1051 rela32_7(unsigned char* view,
1052 const Sized_relobj_file<size, big_endian>* object,
1053 const Symbol_value<size>* psymval,
1054 typename elfcpp::Elf_types<size>::Elf_Addr addend)
1055 {
1056 This_insn::template rela<32>(view, 0, 0x0000007f, object, psymval, addend);
1057 }
1058
1059 // R_SPARC_6: (Symbol + Addend)
1060 static inline void
1061 rela32_6(unsigned char* view,
1062 const Sized_relobj_file<size, big_endian>* object,
1063 const Symbol_value<size>* psymval,
1064 typename elfcpp::Elf_types<size>::Elf_Addr addend)
1065 {
1066 This_insn::template rela<32>(view, 0, 0x0000003f, object, psymval, addend);
1067 }
1068
1069 // R_SPARC_5: (Symbol + Addend)
1070 static inline void
1071 rela32_5(unsigned char* view,
1072 const Sized_relobj_file<size, big_endian>* object,
1073 const Symbol_value<size>* psymval,
1074 typename elfcpp::Elf_types<size>::Elf_Addr addend)
1075 {
1076 This_insn::template rela<32>(view, 0, 0x0000001f, object, psymval, addend);
1077 }
1078
1079 // R_SPARC_TLS_LDO_HIX22: @dtpoff(Symbol + Addend) >> 10
1080 static inline void
1081 ldo_hix22(unsigned char* view,
1082 typename elfcpp::Elf_types<size>::Elf_Addr value,
1083 typename elfcpp::Elf_types<size>::Elf_Addr addend)
1084 {
1085 This_insn::hi22(view, value, addend);
1086 }
1087
1088 // R_SPARC_TLS_LDO_LOX10: @dtpoff(Symbol + Addend) & 0x3ff
1089 static inline void
1090 ldo_lox10(unsigned char* view,
1091 typename elfcpp::Elf_types<size>::Elf_Addr value,
1092 typename elfcpp::Elf_types<size>::Elf_Addr addend)
1093 {
1094 typedef typename elfcpp::Swap<32, true>::Valtype Valtype;
1095 Valtype* wv = reinterpret_cast<Valtype*>(view);
1096 Valtype val = elfcpp::Swap<32, true>::readval(wv);
1097 Valtype reloc = (value + addend);
1098
1099 val &= ~0x1fff;
1100 reloc &= 0x3ff;
1101
1102 elfcpp::Swap<32, true>::writeval(wv, val | reloc);
1103 }
1104
1105 // R_SPARC_TLS_LE_HIX22: (@tpoff(Symbol + Addend) ^ 0xffffffffffffffff) >> 10
1106 static inline void
1107 hix22(unsigned char* view,
1108 typename elfcpp::Elf_types<size>::Elf_Addr value,
1109 typename elfcpp::Elf_types<size>::Elf_Addr addend)
1110 {
1111 typedef typename elfcpp::Swap<32, true>::Valtype Valtype;
1112 Valtype* wv = reinterpret_cast<Valtype*>(view);
1113 Valtype val = elfcpp::Swap<32, true>::readval(wv);
1114 Valtype reloc = (value + addend);
1115
1116 val &= ~0x3fffff;
1117
1118 reloc ^= ~(Valtype)0;
1119 reloc >>= 10;
1120
1121 reloc &= 0x3fffff;
1122
1123 elfcpp::Swap<32, true>::writeval(wv, val | reloc);
1124 }
1125
1126 // R_SPARC_GOTDATA_OP_HIX22: @gdopoff(Symbol + Addend) >> 10
1127 static inline void
1128 gdop_hix22(unsigned char* view,
1129 typename elfcpp::Elf_types<size>::Elf_Addr value)
1130 {
1131 typedef typename elfcpp::Swap<32, true>::Valtype Valtype;
1132 Valtype* wv = reinterpret_cast<Valtype*>(view);
1133 Valtype val = elfcpp::Swap<32, true>::readval(wv);
1134 int32_t reloc = static_cast<int32_t>(value);
1135
1136 val &= ~0x3fffff;
1137
1138 if (reloc < 0)
1139 reloc ^= ~static_cast<int32_t>(0);
1140 reloc >>= 10;
1141
1142 reloc &= 0x3fffff;
1143
1144 elfcpp::Swap<32, true>::writeval(wv, val | reloc);
1145 }
1146
1147 // R_SPARC_HIX22: ((Symbol + Addend) ^ 0xffffffffffffffff) >> 10
1148 static inline void
1149 hix22(unsigned char* view,
1150 const Sized_relobj_file<size, big_endian>* object,
1151 const Symbol_value<size>* psymval,
1152 typename elfcpp::Elf_types<size>::Elf_Addr addend)
1153 {
1154 typedef typename elfcpp::Swap<32, true>::Valtype Valtype;
1155 Valtype* wv = reinterpret_cast<Valtype*>(view);
1156 Valtype val = elfcpp::Swap<32, true>::readval(wv);
1157 Valtype reloc = psymval->value(object, addend);
1158
1159 val &= ~0x3fffff;
1160
1161 reloc ^= ~(Valtype)0;
1162 reloc >>= 10;
1163
1164 reloc &= 0x3fffff;
1165
1166 elfcpp::Swap<32, true>::writeval(wv, val | reloc);
1167 }
1168
1169
1170 // R_SPARC_TLS_LE_LOX10: (@tpoff(Symbol + Addend) & 0x3ff) | 0x1c00
1171 static inline void
1172 lox10(unsigned char* view,
1173 typename elfcpp::Elf_types<size>::Elf_Addr value,
1174 typename elfcpp::Elf_types<size>::Elf_Addr addend)
1175 {
1176 typedef typename elfcpp::Swap<32, true>::Valtype Valtype;
1177 Valtype* wv = reinterpret_cast<Valtype*>(view);
1178 Valtype val = elfcpp::Swap<32, true>::readval(wv);
1179 Valtype reloc = (value + addend);
1180
1181 val &= ~0x1fff;
1182 reloc &= 0x3ff;
1183 reloc |= 0x1c00;
1184
1185 elfcpp::Swap<32, true>::writeval(wv, val | reloc);
1186 }
1187
1188 // R_SPARC_GOTDATA_OP_LOX10: (@gdopoff(Symbol + Addend) & 0x3ff) | 0x1c00
1189 static inline void
1190 gdop_lox10(unsigned char* view,
1191 typename elfcpp::Elf_types<size>::Elf_Addr value)
1192 {
1193 typedef typename elfcpp::Swap<32, true>::Valtype Valtype;
1194 Valtype* wv = reinterpret_cast<Valtype*>(view);
1195 Valtype val = elfcpp::Swap<32, true>::readval(wv);
1196 int32_t reloc = static_cast<int32_t>(value);
1197
1198 if (reloc < 0)
1199 reloc = (reloc & 0x3ff) | 0x1c00;
1200 else
1201 reloc = (reloc & 0x3ff);
1202
1203 val &= ~0x1fff;
1204 elfcpp::Swap<32, true>::writeval(wv, val | reloc);
1205 }
1206
1207 // R_SPARC_LOX10: ((Symbol + Addend) & 0x3ff) | 0x1c00
1208 static inline void
1209 lox10(unsigned char* view,
1210 const Sized_relobj_file<size, big_endian>* object,
1211 const Symbol_value<size>* psymval,
1212 typename elfcpp::Elf_types<size>::Elf_Addr addend)
1213 {
1214 typedef typename elfcpp::Swap<32, true>::Valtype Valtype;
1215 Valtype* wv = reinterpret_cast<Valtype*>(view);
1216 Valtype val = elfcpp::Swap<32, true>::readval(wv);
1217 Valtype reloc = psymval->value(object, addend);
1218
1219 val &= ~0x1fff;
1220 reloc &= 0x3ff;
1221 reloc |= 0x1c00;
1222
1223 elfcpp::Swap<32, true>::writeval(wv, val | reloc);
1224 }
1225 };
1226
1227 // Get the GOT section, creating it if necessary.
1228
1229 template<int size, bool big_endian>
1230 Output_data_got<size, big_endian>*
1231 Target_sparc<size, big_endian>::got_section(Symbol_table* symtab,
1232 Layout* layout)
1233 {
1234 if (this->got_ == NULL)
1235 {
1236 gold_assert(symtab != NULL && layout != NULL);
1237
1238 this->got_ = new Output_data_got<size, big_endian>();
1239
1240 layout->add_output_section_data(".got", elfcpp::SHT_PROGBITS,
1241 (elfcpp::SHF_ALLOC
1242 | elfcpp::SHF_WRITE),
1243 this->got_, ORDER_RELRO, true);
1244
1245 // Define _GLOBAL_OFFSET_TABLE_ at the start of the .got section.
1246 symtab->define_in_output_data("_GLOBAL_OFFSET_TABLE_", NULL,
1247 Symbol_table::PREDEFINED,
1248 this->got_,
1249 0, 0, elfcpp::STT_OBJECT,
1250 elfcpp::STB_LOCAL,
1251 elfcpp::STV_HIDDEN, 0,
1252 false, false);
1253 }
1254
1255 return this->got_;
1256 }
1257
1258 // Get the dynamic reloc section, creating it if necessary.
1259
1260 template<int size, bool big_endian>
1261 typename Target_sparc<size, big_endian>::Reloc_section*
1262 Target_sparc<size, big_endian>::rela_dyn_section(Layout* layout)
1263 {
1264 if (this->rela_dyn_ == NULL)
1265 {
1266 gold_assert(layout != NULL);
1267 this->rela_dyn_ = new Reloc_section(parameters->options().combreloc());
1268 layout->add_output_section_data(".rela.dyn", elfcpp::SHT_RELA,
1269 elfcpp::SHF_ALLOC, this->rela_dyn_,
1270 ORDER_DYNAMIC_RELOCS, false);
1271 }
1272 return this->rela_dyn_;
1273 }
1274
1275 // Get the section to use for IFUNC relocs, creating it if
1276 // necessary. These go in .rela.dyn, but only after all other dynamic
1277 // relocations. They need to follow the other dynamic relocations so
1278 // that they can refer to global variables initialized by those
1279 // relocs.
1280
1281 template<int size, bool big_endian>
1282 typename Target_sparc<size, big_endian>::Reloc_section*
1283 Target_sparc<size, big_endian>::rela_ifunc_section(Layout* layout)
1284 {
1285 if (this->rela_ifunc_ == NULL)
1286 {
1287 // Make sure we have already created the dynamic reloc section.
1288 this->rela_dyn_section(layout);
1289 this->rela_ifunc_ = new Reloc_section(false);
1290 layout->add_output_section_data(".rela.dyn", elfcpp::SHT_RELA,
1291 elfcpp::SHF_ALLOC, this->rela_ifunc_,
1292 ORDER_DYNAMIC_RELOCS, false);
1293 gold_assert(this->rela_dyn_->output_section()
1294 == this->rela_ifunc_->output_section());
1295 }
1296 return this->rela_ifunc_;
1297 }
1298
1299 // A class to handle the PLT data.
1300
1301 template<int size, bool big_endian>
1302 class Output_data_plt_sparc : public Output_section_data
1303 {
1304 public:
1305 typedef Output_data_reloc<elfcpp::SHT_RELA, true,
1306 size, big_endian> Reloc_section;
1307
1308 Output_data_plt_sparc(Layout*);
1309
1310 // Add an entry to the PLT.
1311 void add_entry(Symbol_table* symtab, Layout* layout, Symbol* gsym);
1312
1313 // Add an entry to the PLT for a local STT_GNU_IFUNC symbol.
1314 unsigned int
1315 add_local_ifunc_entry(Symbol_table*, Layout*,
1316 Sized_relobj_file<size, big_endian>* relobj,
1317 unsigned int local_sym_index);
1318
1319 // Return the .rela.plt section data.
1320 const Reloc_section* rel_plt() const
1321 {
1322 return this->rel_;
1323 }
1324
1325 // Return where the IFUNC relocations should go.
1326 Reloc_section*
1327 rela_ifunc(Symbol_table*, Layout*);
1328
1329 void
1330 emit_pending_ifunc_relocs();
1331
1332 // Return whether we created a section for IFUNC relocations.
1333 bool
1334 has_ifunc_section() const
1335 { return this->ifunc_rel_ != NULL; }
1336
1337 // Return the number of PLT entries.
1338 unsigned int
1339 entry_count() const
1340 { return this->count_ + this->ifunc_count_; }
1341
1342 // Return the offset of the first non-reserved PLT entry.
1343 static unsigned int
1344 first_plt_entry_offset()
1345 { return 4 * base_plt_entry_size; }
1346
1347 // Return the size of a PLT entry.
1348 static unsigned int
1349 get_plt_entry_size()
1350 { return base_plt_entry_size; }
1351
1352 // Return the PLT address to use for a global symbol.
1353 uint64_t
1354 address_for_global(const Symbol*);
1355
1356 // Return the PLT address to use for a local symbol.
1357 uint64_t
1358 address_for_local(const Relobj*, unsigned int symndx);
1359
1360 protected:
1361 void do_adjust_output_section(Output_section* os);
1362
1363 // Write to a map file.
1364 void
1365 do_print_to_mapfile(Mapfile* mapfile) const
1366 { mapfile->print_output_data(this, _("** PLT")); }
1367
1368 private:
1369 // The size of an entry in the PLT.
1370 static const int base_plt_entry_size = (size == 32 ? 12 : 32);
1371
1372 static const unsigned int plt_entries_per_block = 160;
1373 static const unsigned int plt_insn_chunk_size = 24;
1374 static const unsigned int plt_pointer_chunk_size = 8;
1375 static const unsigned int plt_block_size =
1376 (plt_entries_per_block
1377 * (plt_insn_chunk_size + plt_pointer_chunk_size));
1378
1379 section_offset_type
1380 plt_index_to_offset(unsigned int index)
1381 {
1382 section_offset_type offset;
1383
1384 if (size == 32 || index < 32768)
1385 offset = index * base_plt_entry_size;
1386 else
1387 {
1388 unsigned int ext_index = index - 32768;
1389
1390 offset = (32768 * base_plt_entry_size)
1391 + ((ext_index / plt_entries_per_block)
1392 * plt_block_size)
1393 + ((ext_index % plt_entries_per_block)
1394 * plt_insn_chunk_size);
1395 }
1396 return offset;
1397 }
1398
1399 // Set the final size.
1400 void
1401 set_final_data_size()
1402 {
1403 unsigned int full_count = this->entry_count() + 4;
1404 unsigned int extra = (size == 32 ? 4 : 0);
1405 section_offset_type sz = plt_index_to_offset(full_count) + extra;
1406
1407 return this->set_data_size(sz);
1408 }
1409
1410 // Write out the PLT data.
1411 void
1412 do_write(Output_file*);
1413
1414 struct Global_ifunc
1415 {
1416 Reloc_section* rel;
1417 Symbol* gsym;
1418 unsigned int plt_index;
1419 };
1420
1421 struct Local_ifunc
1422 {
1423 Reloc_section* rel;
1424 Sized_relobj_file<size, big_endian>* object;
1425 unsigned int local_sym_index;
1426 unsigned int plt_index;
1427 };
1428
1429 // The reloc section.
1430 Reloc_section* rel_;
1431 // The IFUNC relocations, if necessary. These must follow the
1432 // regular relocations.
1433 Reloc_section* ifunc_rel_;
1434 // The number of PLT entries.
1435 unsigned int count_;
1436 // The number of PLT entries for IFUNC symbols.
1437 unsigned int ifunc_count_;
1438 // Global STT_GNU_IFUNC symbols.
1439 std::vector<Global_ifunc> global_ifuncs_;
1440 // Local STT_GNU_IFUNC symbols.
1441 std::vector<Local_ifunc> local_ifuncs_;
1442 };
1443
1444 // Define the constants as required by C++ standard.
1445
1446 template<int size, bool big_endian>
1447 const int Output_data_plt_sparc<size, big_endian>::base_plt_entry_size;
1448
1449 template<int size, bool big_endian>
1450 const unsigned int
1451 Output_data_plt_sparc<size, big_endian>::plt_entries_per_block;
1452
1453 template<int size, bool big_endian>
1454 const unsigned int Output_data_plt_sparc<size, big_endian>::plt_insn_chunk_size;
1455
1456 template<int size, bool big_endian>
1457 const unsigned int
1458 Output_data_plt_sparc<size, big_endian>::plt_pointer_chunk_size;
1459
1460 template<int size, bool big_endian>
1461 const unsigned int Output_data_plt_sparc<size, big_endian>::plt_block_size;
1462
1463 // Create the PLT section. The ordinary .got section is an argument,
1464 // since we need to refer to the start.
1465
1466 template<int size, bool big_endian>
1467 Output_data_plt_sparc<size, big_endian>::Output_data_plt_sparc(Layout* layout)
1468 : Output_section_data(size == 32 ? 4 : 8), ifunc_rel_(NULL),
1469 count_(0), ifunc_count_(0), global_ifuncs_(), local_ifuncs_()
1470 {
1471 this->rel_ = new Reloc_section(false);
1472 layout->add_output_section_data(".rela.plt", elfcpp::SHT_RELA,
1473 elfcpp::SHF_ALLOC, this->rel_,
1474 ORDER_DYNAMIC_PLT_RELOCS, false);
1475 }
1476
1477 template<int size, bool big_endian>
1478 void
1479 Output_data_plt_sparc<size, big_endian>::do_adjust_output_section(Output_section* os)
1480 {
1481 os->set_entsize(0);
1482 }
1483
1484 // Add an entry to the PLT.
1485
1486 template<int size, bool big_endian>
1487 void
1488 Output_data_plt_sparc<size, big_endian>::add_entry(Symbol_table* symtab,
1489 Layout* layout,
1490 Symbol* gsym)
1491 {
1492 gold_assert(!gsym->has_plt_offset());
1493
1494 section_offset_type plt_offset;
1495 unsigned int index;
1496
1497 if (gsym->type() == elfcpp::STT_GNU_IFUNC
1498 && gsym->can_use_relative_reloc(false))
1499 {
1500 index = this->ifunc_count_;
1501 plt_offset = plt_index_to_offset(index);
1502 gsym->set_plt_offset(plt_offset);
1503 ++this->ifunc_count_;
1504 Reloc_section* rel = this->rela_ifunc(symtab, layout);
1505
1506 struct Global_ifunc gi;
1507 gi.rel = rel;
1508 gi.gsym = gsym;
1509 gi.plt_index = index;
1510 this->global_ifuncs_.push_back(gi);
1511 }
1512 else
1513 {
1514 plt_offset = plt_index_to_offset(this->count_ + 4);
1515 gsym->set_plt_offset(plt_offset);
1516 ++this->count_;
1517 gsym->set_needs_dynsym_entry();
1518 this->rel_->add_global(gsym, elfcpp::R_SPARC_JMP_SLOT, this,
1519 plt_offset, 0);
1520 }
1521
1522 // Note that we don't need to save the symbol. The contents of the
1523 // PLT are independent of which symbols are used. The symbols only
1524 // appear in the relocations.
1525 }
1526
1527 template<int size, bool big_endian>
1528 unsigned int
1529 Output_data_plt_sparc<size, big_endian>::add_local_ifunc_entry(
1530 Symbol_table* symtab,
1531 Layout* layout,
1532 Sized_relobj_file<size, big_endian>* relobj,
1533 unsigned int local_sym_index)
1534 {
1535 unsigned int index = this->ifunc_count_;
1536 section_offset_type plt_offset;
1537
1538 plt_offset = plt_index_to_offset(index);
1539 ++this->ifunc_count_;
1540
1541 Reloc_section* rel = this->rela_ifunc(symtab, layout);
1542
1543 struct Local_ifunc li;
1544 li.rel = rel;
1545 li.object = relobj;
1546 li.local_sym_index = local_sym_index;
1547 li.plt_index = index;
1548 this->local_ifuncs_.push_back(li);
1549
1550 return plt_offset;
1551 }
1552
1553 // Emit any pending IFUNC plt relocations.
1554
1555 template<int size, bool big_endian>
1556 void
1557 Output_data_plt_sparc<size, big_endian>::emit_pending_ifunc_relocs()
1558 {
1559 // Emit any pending IFUNC relocs.
1560 for (typename std::vector<Global_ifunc>::const_iterator p =
1561 this->global_ifuncs_.begin();
1562 p != this->global_ifuncs_.end();
1563 ++p)
1564 {
1565 section_offset_type plt_offset;
1566 unsigned int index;
1567
1568 index = this->count_ + p->plt_index + 4;
1569 plt_offset = this->plt_index_to_offset(index);
1570 p->rel->add_symbolless_global_addend(p->gsym, elfcpp::R_SPARC_JMP_IREL,
1571 this, plt_offset, 0);
1572 }
1573
1574 for (typename std::vector<Local_ifunc>::const_iterator p =
1575 this->local_ifuncs_.begin();
1576 p != this->local_ifuncs_.end();
1577 ++p)
1578 {
1579 section_offset_type plt_offset;
1580 unsigned int index;
1581
1582 index = this->count_ + p->plt_index + 4;
1583 plt_offset = this->plt_index_to_offset(index);
1584 p->rel->add_symbolless_local_addend(p->object, p->local_sym_index,
1585 elfcpp::R_SPARC_JMP_IREL,
1586 this, plt_offset, 0);
1587 }
1588 }
1589
1590 // Return where the IFUNC relocations should go in the PLT. These
1591 // follow the non-IFUNC relocations.
1592
1593 template<int size, bool big_endian>
1594 typename Output_data_plt_sparc<size, big_endian>::Reloc_section*
1595 Output_data_plt_sparc<size, big_endian>::rela_ifunc(
1596 Symbol_table* symtab,
1597 Layout* layout)
1598 {
1599 if (this->ifunc_rel_ == NULL)
1600 {
1601 this->ifunc_rel_ = new Reloc_section(false);
1602 layout->add_output_section_data(".rela.plt", elfcpp::SHT_RELA,
1603 elfcpp::SHF_ALLOC, this->ifunc_rel_,
1604 ORDER_DYNAMIC_PLT_RELOCS, false);
1605 gold_assert(this->ifunc_rel_->output_section()
1606 == this->rel_->output_section());
1607
1608 if (parameters->doing_static_link())
1609 {
1610 // A statically linked executable will only have a .rel.plt
1611 // section to hold R_SPARC_IRELATIVE and R_SPARC_JMP_IREL
1612 // relocs for STT_GNU_IFUNC symbols. The library will use
1613 // these symbols to locate the IRELATIVE and JMP_IREL relocs
1614 // at program startup time.
1615 symtab->define_in_output_data("__rela_iplt_start", NULL,
1616 Symbol_table::PREDEFINED,
1617 this->ifunc_rel_, 0, 0,
1618 elfcpp::STT_NOTYPE, elfcpp::STB_GLOBAL,
1619 elfcpp::STV_HIDDEN, 0, false, true);
1620 symtab->define_in_output_data("__rela_iplt_end", NULL,
1621 Symbol_table::PREDEFINED,
1622 this->ifunc_rel_, 0, 0,
1623 elfcpp::STT_NOTYPE, elfcpp::STB_GLOBAL,
1624 elfcpp::STV_HIDDEN, 0, true, true);
1625 }
1626 }
1627 return this->ifunc_rel_;
1628 }
1629
1630 // Return the PLT address to use for a global symbol.
1631
1632 template<int size, bool big_endian>
1633 uint64_t
1634 Output_data_plt_sparc<size, big_endian>::address_for_global(const Symbol* gsym)
1635 {
1636 uint64_t offset = 0;
1637 if (gsym->type() == elfcpp::STT_GNU_IFUNC
1638 && gsym->can_use_relative_reloc(false))
1639 offset = plt_index_to_offset(this->count_ + 4);
1640 return this->address() + offset + gsym->plt_offset();
1641 }
1642
1643 // Return the PLT address to use for a local symbol. These are always
1644 // IRELATIVE relocs.
1645
1646 template<int size, bool big_endian>
1647 uint64_t
1648 Output_data_plt_sparc<size, big_endian>::address_for_local(
1649 const Relobj* object,
1650 unsigned int r_sym)
1651 {
1652 return (this->address()
1653 + plt_index_to_offset(this->count_ + 4)
1654 + object->local_plt_offset(r_sym));
1655 }
1656
1657 static const unsigned int sparc_nop = 0x01000000;
1658 static const unsigned int sparc_sethi_g1 = 0x03000000;
1659 static const unsigned int sparc_branch_always = 0x30800000;
1660 static const unsigned int sparc_branch_always_pt = 0x30680000;
1661 static const unsigned int sparc_mov = 0x80100000;
1662 static const unsigned int sparc_mov_g0_o0 = 0x90100000;
1663 static const unsigned int sparc_mov_o7_g5 = 0x8a10000f;
1664 static const unsigned int sparc_call_plus_8 = 0x40000002;
1665 static const unsigned int sparc_ldx_o7_imm_g1 = 0xc25be000;
1666 static const unsigned int sparc_jmpl_o7_g1_g1 = 0x83c3c001;
1667 static const unsigned int sparc_mov_g5_o7 = 0x9e100005;
1668
1669 // Write out the PLT.
1670
1671 template<int size, bool big_endian>
1672 void
1673 Output_data_plt_sparc<size, big_endian>::do_write(Output_file* of)
1674 {
1675 const off_t offset = this->offset();
1676 const section_size_type oview_size =
1677 convert_to_section_size_type(this->data_size());
1678 unsigned char* const oview = of->get_output_view(offset, oview_size);
1679 unsigned char* pov = oview;
1680
1681 memset(pov, 0, base_plt_entry_size * 4);
1682 pov += this->first_plt_entry_offset();
1683
1684 unsigned int plt_offset = base_plt_entry_size * 4;
1685 const unsigned int count = this->entry_count();
1686
1687 if (size == 64)
1688 {
1689 unsigned int limit;
1690
1691 limit = (count > 32768 ? 32768 : count);
1692
1693 for (unsigned int i = 0; i < limit; ++i)
1694 {
1695 elfcpp::Swap<32, true>::writeval(pov + 0x00,
1696 sparc_sethi_g1 + plt_offset);
1697 elfcpp::Swap<32, true>::writeval(pov + 0x04,
1698 sparc_branch_always_pt +
1699 (((base_plt_entry_size -
1700 (plt_offset + 4)) >> 2) &
1701 0x7ffff));
1702 elfcpp::Swap<32, true>::writeval(pov + 0x08, sparc_nop);
1703 elfcpp::Swap<32, true>::writeval(pov + 0x0c, sparc_nop);
1704 elfcpp::Swap<32, true>::writeval(pov + 0x10, sparc_nop);
1705 elfcpp::Swap<32, true>::writeval(pov + 0x14, sparc_nop);
1706 elfcpp::Swap<32, true>::writeval(pov + 0x18, sparc_nop);
1707 elfcpp::Swap<32, true>::writeval(pov + 0x1c, sparc_nop);
1708
1709 pov += base_plt_entry_size;
1710 plt_offset += base_plt_entry_size;
1711 }
1712
1713 if (count > 32768)
1714 {
1715 unsigned int ext_cnt = count - 32768;
1716 unsigned int blks = ext_cnt / plt_entries_per_block;
1717
1718 for (unsigned int i = 0; i < blks; ++i)
1719 {
1720 unsigned int data_off = (plt_entries_per_block
1721 * plt_insn_chunk_size) - 4;
1722
1723 for (unsigned int j = 0; j < plt_entries_per_block; ++j)
1724 {
1725 elfcpp::Swap<32, true>::writeval(pov + 0x00,
1726 sparc_mov_o7_g5);
1727 elfcpp::Swap<32, true>::writeval(pov + 0x04,
1728 sparc_call_plus_8);
1729 elfcpp::Swap<32, true>::writeval(pov + 0x08,
1730 sparc_nop);
1731 elfcpp::Swap<32, true>::writeval(pov + 0x0c,
1732 sparc_ldx_o7_imm_g1 +
1733 (data_off & 0x1fff));
1734 elfcpp::Swap<32, true>::writeval(pov + 0x10,
1735 sparc_jmpl_o7_g1_g1);
1736 elfcpp::Swap<32, true>::writeval(pov + 0x14,
1737 sparc_mov_g5_o7);
1738
1739 elfcpp::Swap<64, big_endian>::writeval(
1740 pov + 0x4 + data_off,
1741 (elfcpp::Elf_Xword) (oview - (pov + 0x04)));
1742
1743 pov += plt_insn_chunk_size;
1744 data_off -= 16;
1745 }
1746 }
1747
1748 unsigned int sub_blk_cnt = ext_cnt % plt_entries_per_block;
1749 for (unsigned int i = 0; i < sub_blk_cnt; ++i)
1750 {
1751 unsigned int data_off = (sub_blk_cnt
1752 * plt_insn_chunk_size) - 4;
1753
1754 for (unsigned int j = 0; j < plt_entries_per_block; ++j)
1755 {
1756 elfcpp::Swap<32, true>::writeval(pov + 0x00,
1757 sparc_mov_o7_g5);
1758 elfcpp::Swap<32, true>::writeval(pov + 0x04,
1759 sparc_call_plus_8);
1760 elfcpp::Swap<32, true>::writeval(pov + 0x08,
1761 sparc_nop);
1762 elfcpp::Swap<32, true>::writeval(pov + 0x0c,
1763 sparc_ldx_o7_imm_g1 +
1764 (data_off & 0x1fff));
1765 elfcpp::Swap<32, true>::writeval(pov + 0x10,
1766 sparc_jmpl_o7_g1_g1);
1767 elfcpp::Swap<32, true>::writeval(pov + 0x14,
1768 sparc_mov_g5_o7);
1769
1770 elfcpp::Swap<64, big_endian>::writeval(
1771 pov + 0x4 + data_off,
1772 (elfcpp::Elf_Xword) (oview - (pov + 0x04)));
1773
1774 pov += plt_insn_chunk_size;
1775 data_off -= 16;
1776 }
1777 }
1778 }
1779 }
1780 else
1781 {
1782 for (unsigned int i = 0; i < count; ++i)
1783 {
1784 elfcpp::Swap<32, true>::writeval(pov + 0x00,
1785 sparc_sethi_g1 + plt_offset);
1786 elfcpp::Swap<32, true>::writeval(pov + 0x04,
1787 sparc_branch_always +
1788 (((- (plt_offset + 4)) >> 2) &
1789 0x003fffff));
1790 elfcpp::Swap<32, true>::writeval(pov + 0x08, sparc_nop);
1791
1792 pov += base_plt_entry_size;
1793 plt_offset += base_plt_entry_size;
1794 }
1795
1796 elfcpp::Swap<32, true>::writeval(pov, sparc_nop);
1797 pov += 4;
1798 }
1799
1800 gold_assert(static_cast<section_size_type>(pov - oview) == oview_size);
1801
1802 of->write_output_view(offset, oview_size, oview);
1803 }
1804
1805 // Create the PLT section.
1806
1807 template<int size, bool big_endian>
1808 void
1809 Target_sparc<size, big_endian>::make_plt_section(Symbol_table* symtab,
1810 Layout* layout)
1811 {
1812 // Create the GOT sections first.
1813 this->got_section(symtab, layout);
1814
1815 // Ensure that .rela.dyn always appears before .rela.plt This is
1816 // necessary due to how, on Sparc and some other targets, .rela.dyn
1817 // needs to include .rela.plt in it's range.
1818 this->rela_dyn_section(layout);
1819
1820 this->plt_ = new Output_data_plt_sparc<size, big_endian>(layout);
1821 layout->add_output_section_data(".plt", elfcpp::SHT_PROGBITS,
1822 (elfcpp::SHF_ALLOC
1823 | elfcpp::SHF_EXECINSTR
1824 | elfcpp::SHF_WRITE),
1825 this->plt_, ORDER_NON_RELRO_FIRST, false);
1826
1827 // Define _PROCEDURE_LINKAGE_TABLE_ at the start of the .plt section.
1828 symtab->define_in_output_data("_PROCEDURE_LINKAGE_TABLE_", NULL,
1829 Symbol_table::PREDEFINED,
1830 this->plt_,
1831 0, 0, elfcpp::STT_OBJECT,
1832 elfcpp::STB_LOCAL,
1833 elfcpp::STV_HIDDEN, 0,
1834 false, false);
1835 }
1836
1837 // Create a PLT entry for a global symbol.
1838
1839 template<int size, bool big_endian>
1840 void
1841 Target_sparc<size, big_endian>::make_plt_entry(Symbol_table* symtab,
1842 Layout* layout,
1843 Symbol* gsym)
1844 {
1845 if (gsym->has_plt_offset())
1846 return;
1847
1848 if (this->plt_ == NULL)
1849 this->make_plt_section(symtab, layout);
1850
1851 this->plt_->add_entry(symtab, layout, gsym);
1852 }
1853
1854 // Make a PLT entry for a local STT_GNU_IFUNC symbol.
1855
1856 template<int size, bool big_endian>
1857 void
1858 Target_sparc<size, big_endian>::make_local_ifunc_plt_entry(
1859 Symbol_table* symtab,
1860 Layout* layout,
1861 Sized_relobj_file<size, big_endian>* relobj,
1862 unsigned int local_sym_index)
1863 {
1864 if (relobj->local_has_plt_offset(local_sym_index))
1865 return;
1866 if (this->plt_ == NULL)
1867 this->make_plt_section(symtab, layout);
1868 unsigned int plt_offset = this->plt_->add_local_ifunc_entry(symtab, layout,
1869 relobj,
1870 local_sym_index);
1871 relobj->set_local_plt_offset(local_sym_index, plt_offset);
1872 }
1873
1874 // Return the number of entries in the PLT.
1875
1876 template<int size, bool big_endian>
1877 unsigned int
1878 Target_sparc<size, big_endian>::plt_entry_count() const
1879 {
1880 if (this->plt_ == NULL)
1881 return 0;
1882 return this->plt_->entry_count();
1883 }
1884
1885 // Return the offset of the first non-reserved PLT entry.
1886
1887 template<int size, bool big_endian>
1888 unsigned int
1889 Target_sparc<size, big_endian>::first_plt_entry_offset() const
1890 {
1891 return Output_data_plt_sparc<size, big_endian>::first_plt_entry_offset();
1892 }
1893
1894 // Return the size of each PLT entry.
1895
1896 template<int size, bool big_endian>
1897 unsigned int
1898 Target_sparc<size, big_endian>::plt_entry_size() const
1899 {
1900 return Output_data_plt_sparc<size, big_endian>::get_plt_entry_size();
1901 }
1902
1903 // Create a GOT entry for the TLS module index.
1904
1905 template<int size, bool big_endian>
1906 unsigned int
1907 Target_sparc<size, big_endian>::got_mod_index_entry(
1908 Symbol_table* symtab,
1909 Layout* layout,
1910 Sized_relobj_file<size, big_endian>* object)
1911 {
1912 if (this->got_mod_index_offset_ == -1U)
1913 {
1914 gold_assert(symtab != NULL && layout != NULL && object != NULL);
1915 Reloc_section* rela_dyn = this->rela_dyn_section(layout);
1916 Output_data_got<size, big_endian>* got;
1917 unsigned int got_offset;
1918
1919 got = this->got_section(symtab, layout);
1920 got_offset = got->add_constant(0);
1921 rela_dyn->add_local(object, 0,
1922 (size == 64 ?
1923 elfcpp::R_SPARC_TLS_DTPMOD64 :
1924 elfcpp::R_SPARC_TLS_DTPMOD32), got,
1925 got_offset, 0);
1926 got->add_constant(0);
1927 this->got_mod_index_offset_ = got_offset;
1928 }
1929 return this->got_mod_index_offset_;
1930 }
1931
1932 // Optimize the TLS relocation type based on what we know about the
1933 // symbol. IS_FINAL is true if the final address of this symbol is
1934 // known at link time.
1935
1936 static tls::Tls_optimization
1937 optimize_tls_reloc(bool is_final, int r_type)
1938 {
1939 // If we are generating a shared library, then we can't do anything
1940 // in the linker.
1941 if (parameters->options().shared())
1942 return tls::TLSOPT_NONE;
1943
1944 switch (r_type)
1945 {
1946 case elfcpp::R_SPARC_TLS_GD_HI22: // Global-dynamic
1947 case elfcpp::R_SPARC_TLS_GD_LO10:
1948 case elfcpp::R_SPARC_TLS_GD_ADD:
1949 case elfcpp::R_SPARC_TLS_GD_CALL:
1950 // These are General-Dynamic which permits fully general TLS
1951 // access. Since we know that we are generating an executable,
1952 // we can convert this to Initial-Exec. If we also know that
1953 // this is a local symbol, we can further switch to Local-Exec.
1954 if (is_final)
1955 return tls::TLSOPT_TO_LE;
1956 return tls::TLSOPT_TO_IE;
1957
1958 case elfcpp::R_SPARC_TLS_LDM_HI22: // Local-dynamic
1959 case elfcpp::R_SPARC_TLS_LDM_LO10:
1960 case elfcpp::R_SPARC_TLS_LDM_ADD:
1961 case elfcpp::R_SPARC_TLS_LDM_CALL:
1962 // This is Local-Dynamic, which refers to a local symbol in the
1963 // dynamic TLS block. Since we know that we generating an
1964 // executable, we can switch to Local-Exec.
1965 return tls::TLSOPT_TO_LE;
1966
1967 case elfcpp::R_SPARC_TLS_LDO_HIX22: // Alternate local-dynamic
1968 case elfcpp::R_SPARC_TLS_LDO_LOX10:
1969 case elfcpp::R_SPARC_TLS_LDO_ADD:
1970 // Another type of Local-Dynamic relocation.
1971 return tls::TLSOPT_TO_LE;
1972
1973 case elfcpp::R_SPARC_TLS_IE_HI22: // Initial-exec
1974 case elfcpp::R_SPARC_TLS_IE_LO10:
1975 case elfcpp::R_SPARC_TLS_IE_LD:
1976 case elfcpp::R_SPARC_TLS_IE_LDX:
1977 case elfcpp::R_SPARC_TLS_IE_ADD:
1978 // These are Initial-Exec relocs which get the thread offset
1979 // from the GOT. If we know that we are linking against the
1980 // local symbol, we can switch to Local-Exec, which links the
1981 // thread offset into the instruction.
1982 if (is_final)
1983 return tls::TLSOPT_TO_LE;
1984 return tls::TLSOPT_NONE;
1985
1986 case elfcpp::R_SPARC_TLS_LE_HIX22: // Local-exec
1987 case elfcpp::R_SPARC_TLS_LE_LOX10:
1988 // When we already have Local-Exec, there is nothing further we
1989 // can do.
1990 return tls::TLSOPT_NONE;
1991
1992 default:
1993 gold_unreachable();
1994 }
1995 }
1996
1997 // Get the Reference_flags for a particular relocation.
1998
1999 template<int size, bool big_endian>
2000 int
2001 Target_sparc<size, big_endian>::Scan::get_reference_flags(unsigned int r_type)
2002 {
2003 r_type &= 0xff;
2004 switch (r_type)
2005 {
2006 case elfcpp::R_SPARC_NONE:
2007 case elfcpp::R_SPARC_REGISTER:
2008 case elfcpp::R_SPARC_GNU_VTINHERIT:
2009 case elfcpp::R_SPARC_GNU_VTENTRY:
2010 // No symbol reference.
2011 return 0;
2012
2013 case elfcpp::R_SPARC_UA64:
2014 case elfcpp::R_SPARC_64:
2015 case elfcpp::R_SPARC_HIX22:
2016 case elfcpp::R_SPARC_LOX10:
2017 case elfcpp::R_SPARC_H34:
2018 case elfcpp::R_SPARC_H44:
2019 case elfcpp::R_SPARC_M44:
2020 case elfcpp::R_SPARC_L44:
2021 case elfcpp::R_SPARC_HH22:
2022 case elfcpp::R_SPARC_HM10:
2023 case elfcpp::R_SPARC_LM22:
2024 case elfcpp::R_SPARC_HI22:
2025 case elfcpp::R_SPARC_LO10:
2026 case elfcpp::R_SPARC_OLO10:
2027 case elfcpp::R_SPARC_UA32:
2028 case elfcpp::R_SPARC_32:
2029 case elfcpp::R_SPARC_UA16:
2030 case elfcpp::R_SPARC_16:
2031 case elfcpp::R_SPARC_11:
2032 case elfcpp::R_SPARC_10:
2033 case elfcpp::R_SPARC_8:
2034 case elfcpp::R_SPARC_7:
2035 case elfcpp::R_SPARC_6:
2036 case elfcpp::R_SPARC_5:
2037 return Symbol::ABSOLUTE_REF;
2038
2039 case elfcpp::R_SPARC_DISP8:
2040 case elfcpp::R_SPARC_DISP16:
2041 case elfcpp::R_SPARC_DISP32:
2042 case elfcpp::R_SPARC_DISP64:
2043 case elfcpp::R_SPARC_PC_HH22:
2044 case elfcpp::R_SPARC_PC_HM10:
2045 case elfcpp::R_SPARC_PC_LM22:
2046 case elfcpp::R_SPARC_PC10:
2047 case elfcpp::R_SPARC_PC22:
2048 case elfcpp::R_SPARC_WDISP30:
2049 case elfcpp::R_SPARC_WDISP22:
2050 case elfcpp::R_SPARC_WDISP19:
2051 case elfcpp::R_SPARC_WDISP16:
2052 case elfcpp::R_SPARC_WDISP10:
2053 return Symbol::RELATIVE_REF;
2054
2055 case elfcpp::R_SPARC_PLT64:
2056 case elfcpp::R_SPARC_PLT32:
2057 case elfcpp::R_SPARC_HIPLT22:
2058 case elfcpp::R_SPARC_LOPLT10:
2059 case elfcpp::R_SPARC_PCPLT10:
2060 return Symbol::FUNCTION_CALL | Symbol::ABSOLUTE_REF;
2061
2062 case elfcpp::R_SPARC_PCPLT32:
2063 case elfcpp::R_SPARC_PCPLT22:
2064 case elfcpp::R_SPARC_WPLT30:
2065 return Symbol::FUNCTION_CALL | Symbol::RELATIVE_REF;
2066
2067 case elfcpp::R_SPARC_GOTDATA_OP:
2068 case elfcpp::R_SPARC_GOTDATA_OP_HIX22:
2069 case elfcpp::R_SPARC_GOTDATA_OP_LOX10:
2070 case elfcpp::R_SPARC_GOT10:
2071 case elfcpp::R_SPARC_GOT13:
2072 case elfcpp::R_SPARC_GOT22:
2073 // Absolute in GOT.
2074 return Symbol::ABSOLUTE_REF;
2075
2076 case elfcpp::R_SPARC_TLS_GD_HI22: // Global-dynamic
2077 case elfcpp::R_SPARC_TLS_GD_LO10:
2078 case elfcpp::R_SPARC_TLS_GD_ADD:
2079 case elfcpp::R_SPARC_TLS_GD_CALL:
2080 case elfcpp::R_SPARC_TLS_LDM_HI22: // Local-dynamic
2081 case elfcpp::R_SPARC_TLS_LDM_LO10:
2082 case elfcpp::R_SPARC_TLS_LDM_ADD:
2083 case elfcpp::R_SPARC_TLS_LDM_CALL:
2084 case elfcpp::R_SPARC_TLS_LDO_HIX22: // Alternate local-dynamic
2085 case elfcpp::R_SPARC_TLS_LDO_LOX10:
2086 case elfcpp::R_SPARC_TLS_LDO_ADD:
2087 case elfcpp::R_SPARC_TLS_LE_HIX22:
2088 case elfcpp::R_SPARC_TLS_LE_LOX10:
2089 case elfcpp::R_SPARC_TLS_IE_HI22: // Initial-exec
2090 case elfcpp::R_SPARC_TLS_IE_LO10:
2091 case elfcpp::R_SPARC_TLS_IE_LD:
2092 case elfcpp::R_SPARC_TLS_IE_LDX:
2093 case elfcpp::R_SPARC_TLS_IE_ADD:
2094 return Symbol::TLS_REF;
2095
2096 case elfcpp::R_SPARC_COPY:
2097 case elfcpp::R_SPARC_GLOB_DAT:
2098 case elfcpp::R_SPARC_JMP_SLOT:
2099 case elfcpp::R_SPARC_JMP_IREL:
2100 case elfcpp::R_SPARC_RELATIVE:
2101 case elfcpp::R_SPARC_IRELATIVE:
2102 case elfcpp::R_SPARC_TLS_DTPMOD64:
2103 case elfcpp::R_SPARC_TLS_DTPMOD32:
2104 case elfcpp::R_SPARC_TLS_DTPOFF64:
2105 case elfcpp::R_SPARC_TLS_DTPOFF32:
2106 case elfcpp::R_SPARC_TLS_TPOFF64:
2107 case elfcpp::R_SPARC_TLS_TPOFF32:
2108 default:
2109 // Not expected. We will give an error later.
2110 return 0;
2111 }
2112 }
2113
2114 // Generate a PLT entry slot for a call to __tls_get_addr
2115 template<int size, bool big_endian>
2116 void
2117 Target_sparc<size, big_endian>::Scan::generate_tls_call(Symbol_table* symtab,
2118 Layout* layout,
2119 Target_sparc<size, big_endian>* target)
2120 {
2121 Symbol* gsym = target->tls_get_addr_sym(symtab);
2122
2123 target->make_plt_entry(symtab, layout, gsym);
2124 }
2125
2126 // Report an unsupported relocation against a local symbol.
2127
2128 template<int size, bool big_endian>
2129 void
2130 Target_sparc<size, big_endian>::Scan::unsupported_reloc_local(
2131 Sized_relobj_file<size, big_endian>* object,
2132 unsigned int r_type)
2133 {
2134 gold_error(_("%s: unsupported reloc %u against local symbol"),
2135 object->name().c_str(), r_type);
2136 }
2137
2138 // We are about to emit a dynamic relocation of type R_TYPE. If the
2139 // dynamic linker does not support it, issue an error.
2140
2141 template<int size, bool big_endian>
2142 void
2143 Target_sparc<size, big_endian>::Scan::check_non_pic(Relobj* object, unsigned int r_type)
2144 {
2145 gold_assert(r_type != elfcpp::R_SPARC_NONE);
2146
2147 if (size == 64)
2148 {
2149 switch (r_type)
2150 {
2151 // These are the relocation types supported by glibc for sparc 64-bit.
2152 case elfcpp::R_SPARC_RELATIVE:
2153 case elfcpp::R_SPARC_IRELATIVE:
2154 case elfcpp::R_SPARC_COPY:
2155 case elfcpp::R_SPARC_32:
2156 case elfcpp::R_SPARC_64:
2157 case elfcpp::R_SPARC_GLOB_DAT:
2158 case elfcpp::R_SPARC_JMP_SLOT:
2159 case elfcpp::R_SPARC_JMP_IREL:
2160 case elfcpp::R_SPARC_TLS_DTPMOD64:
2161 case elfcpp::R_SPARC_TLS_DTPOFF64:
2162 case elfcpp::R_SPARC_TLS_TPOFF64:
2163 case elfcpp::R_SPARC_TLS_LE_HIX22:
2164 case elfcpp::R_SPARC_TLS_LE_LOX10:
2165 case elfcpp::R_SPARC_8:
2166 case elfcpp::R_SPARC_16:
2167 case elfcpp::R_SPARC_DISP8:
2168 case elfcpp::R_SPARC_DISP16:
2169 case elfcpp::R_SPARC_DISP32:
2170 case elfcpp::R_SPARC_WDISP30:
2171 case elfcpp::R_SPARC_LO10:
2172 case elfcpp::R_SPARC_HI22:
2173 case elfcpp::R_SPARC_OLO10:
2174 case elfcpp::R_SPARC_H34:
2175 case elfcpp::R_SPARC_H44:
2176 case elfcpp::R_SPARC_M44:
2177 case elfcpp::R_SPARC_L44:
2178 case elfcpp::R_SPARC_HH22:
2179 case elfcpp::R_SPARC_HM10:
2180 case elfcpp::R_SPARC_LM22:
2181 case elfcpp::R_SPARC_UA16:
2182 case elfcpp::R_SPARC_UA32:
2183 case elfcpp::R_SPARC_UA64:
2184 return;
2185
2186 default:
2187 break;
2188 }
2189 }
2190 else
2191 {
2192 switch (r_type)
2193 {
2194 // These are the relocation types supported by glibc for sparc 32-bit.
2195 case elfcpp::R_SPARC_RELATIVE:
2196 case elfcpp::R_SPARC_IRELATIVE:
2197 case elfcpp::R_SPARC_COPY:
2198 case elfcpp::R_SPARC_GLOB_DAT:
2199 case elfcpp::R_SPARC_32:
2200 case elfcpp::R_SPARC_JMP_SLOT:
2201 case elfcpp::R_SPARC_JMP_IREL:
2202 case elfcpp::R_SPARC_TLS_DTPMOD32:
2203 case elfcpp::R_SPARC_TLS_DTPOFF32:
2204 case elfcpp::R_SPARC_TLS_TPOFF32:
2205 case elfcpp::R_SPARC_TLS_LE_HIX22:
2206 case elfcpp::R_SPARC_TLS_LE_LOX10:
2207 case elfcpp::R_SPARC_8:
2208 case elfcpp::R_SPARC_16:
2209 case elfcpp::R_SPARC_DISP8:
2210 case elfcpp::R_SPARC_DISP16:
2211 case elfcpp::R_SPARC_DISP32:
2212 case elfcpp::R_SPARC_LO10:
2213 case elfcpp::R_SPARC_WDISP30:
2214 case elfcpp::R_SPARC_HI22:
2215 case elfcpp::R_SPARC_UA16:
2216 case elfcpp::R_SPARC_UA32:
2217 return;
2218
2219 default:
2220 break;
2221 }
2222 }
2223
2224 // This prevents us from issuing more than one error per reloc
2225 // section. But we can still wind up issuing more than one
2226 // error per object file.
2227 if (this->issued_non_pic_error_)
2228 return;
2229 gold_assert(parameters->options().output_is_position_independent());
2230 object->error(_("requires unsupported dynamic reloc; "
2231 "recompile with -fPIC"));
2232 this->issued_non_pic_error_ = true;
2233 return;
2234 }
2235
2236 // Return whether we need to make a PLT entry for a relocation of the
2237 // given type against a STT_GNU_IFUNC symbol.
2238
2239 template<int size, bool big_endian>
2240 bool
2241 Target_sparc<size, big_endian>::Scan::reloc_needs_plt_for_ifunc(
2242 Sized_relobj_file<size, big_endian>* object,
2243 unsigned int r_type)
2244 {
2245 int flags = Scan::get_reference_flags(r_type);
2246 if (flags & Symbol::TLS_REF)
2247 gold_error(_("%s: unsupported TLS reloc %u for IFUNC symbol"),
2248 object->name().c_str(), r_type);
2249 return flags != 0;
2250 }
2251
2252 // Scan a relocation for a local symbol.
2253
2254 template<int size, bool big_endian>
2255 inline void
2256 Target_sparc<size, big_endian>::Scan::local(
2257 Symbol_table* symtab,
2258 Layout* layout,
2259 Target_sparc<size, big_endian>* target,
2260 Sized_relobj_file<size, big_endian>* object,
2261 unsigned int data_shndx,
2262 Output_section* output_section,
2263 const elfcpp::Rela<size, big_endian>& reloc,
2264 unsigned int r_type,
2265 const elfcpp::Sym<size, big_endian>& lsym,
2266 bool is_discarded)
2267 {
2268 if (is_discarded)
2269 return;
2270
2271 bool is_ifunc = lsym.get_st_type() == elfcpp::STT_GNU_IFUNC;
2272 unsigned int orig_r_type = r_type;
2273 r_type &= 0xff;
2274
2275 if (is_ifunc
2276 && this->reloc_needs_plt_for_ifunc(object, r_type))
2277 {
2278 unsigned int r_sym = elfcpp::elf_r_sym<size>(reloc.get_r_info());
2279 target->make_local_ifunc_plt_entry(symtab, layout, object, r_sym);
2280 }
2281
2282 switch (r_type)
2283 {
2284 case elfcpp::R_SPARC_NONE:
2285 case elfcpp::R_SPARC_REGISTER:
2286 case elfcpp::R_SPARC_GNU_VTINHERIT:
2287 case elfcpp::R_SPARC_GNU_VTENTRY:
2288 break;
2289
2290 case elfcpp::R_SPARC_64:
2291 case elfcpp::R_SPARC_32:
2292 // If building a shared library (or a position-independent
2293 // executable), we need to create a dynamic relocation for
2294 // this location. The relocation applied at link time will
2295 // apply the link-time value, so we flag the location with
2296 // an R_SPARC_RELATIVE relocation so the dynamic loader can
2297 // relocate it easily.
2298 if (parameters->options().output_is_position_independent()
2299 && ((size == 64 && r_type == elfcpp::R_SPARC_64)
2300 || (size == 32 && r_type == elfcpp::R_SPARC_32)))
2301 {
2302 Reloc_section* rela_dyn = target->rela_dyn_section(layout);
2303 unsigned int r_sym = elfcpp::elf_r_sym<size>(reloc.get_r_info());
2304 rela_dyn->add_local_relative(object, r_sym, elfcpp::R_SPARC_RELATIVE,
2305 output_section, data_shndx,
2306 reloc.get_r_offset(),
2307 reloc.get_r_addend(), is_ifunc);
2308 break;
2309 }
2310 // Fall through.
2311
2312 case elfcpp::R_SPARC_HIX22:
2313 case elfcpp::R_SPARC_LOX10:
2314 case elfcpp::R_SPARC_H34:
2315 case elfcpp::R_SPARC_H44:
2316 case elfcpp::R_SPARC_M44:
2317 case elfcpp::R_SPARC_L44:
2318 case elfcpp::R_SPARC_HH22:
2319 case elfcpp::R_SPARC_HM10:
2320 case elfcpp::R_SPARC_LM22:
2321 case elfcpp::R_SPARC_UA64:
2322 case elfcpp::R_SPARC_UA32:
2323 case elfcpp::R_SPARC_UA16:
2324 case elfcpp::R_SPARC_HI22:
2325 case elfcpp::R_SPARC_LO10:
2326 case elfcpp::R_SPARC_OLO10:
2327 case elfcpp::R_SPARC_16:
2328 case elfcpp::R_SPARC_11:
2329 case elfcpp::R_SPARC_10:
2330 case elfcpp::R_SPARC_8:
2331 case elfcpp::R_SPARC_7:
2332 case elfcpp::R_SPARC_6:
2333 case elfcpp::R_SPARC_5:
2334 // If building a shared library (or a position-independent
2335 // executable), we need to create a dynamic relocation for
2336 // this location.
2337 if (parameters->options().output_is_position_independent())
2338 {
2339 Reloc_section* rela_dyn = target->rela_dyn_section(layout);
2340 unsigned int r_sym = elfcpp::elf_r_sym<size>(reloc.get_r_info());
2341
2342 check_non_pic(object, r_type);
2343 if (lsym.get_st_type() != elfcpp::STT_SECTION)
2344 {
2345 rela_dyn->add_local(object, r_sym, orig_r_type, output_section,
2346 data_shndx, reloc.get_r_offset(),
2347 reloc.get_r_addend());
2348 }
2349 else
2350 {
2351 gold_assert(lsym.get_st_value() == 0);
2352 rela_dyn->add_symbolless_local_addend(object, r_sym, orig_r_type,
2353 output_section, data_shndx,
2354 reloc.get_r_offset(),
2355 reloc.get_r_addend());
2356 }
2357 }
2358 break;
2359
2360 case elfcpp::R_SPARC_WDISP30:
2361 case elfcpp::R_SPARC_WPLT30:
2362 case elfcpp::R_SPARC_WDISP22:
2363 case elfcpp::R_SPARC_WDISP19:
2364 case elfcpp::R_SPARC_WDISP16:
2365 case elfcpp::R_SPARC_WDISP10:
2366 case elfcpp::R_SPARC_DISP8:
2367 case elfcpp::R_SPARC_DISP16:
2368 case elfcpp::R_SPARC_DISP32:
2369 case elfcpp::R_SPARC_DISP64:
2370 case elfcpp::R_SPARC_PC10:
2371 case elfcpp::R_SPARC_PC22:
2372 break;
2373
2374 case elfcpp::R_SPARC_GOTDATA_OP:
2375 case elfcpp::R_SPARC_GOTDATA_OP_HIX22:
2376 case elfcpp::R_SPARC_GOTDATA_OP_LOX10:
2377 // We will optimize this into a GOT relative relocation
2378 // and code transform the GOT load into an addition.
2379 break;
2380
2381 case elfcpp::R_SPARC_GOT10:
2382 case elfcpp::R_SPARC_GOT13:
2383 case elfcpp::R_SPARC_GOT22:
2384 {
2385 // The symbol requires a GOT entry.
2386 Output_data_got<size, big_endian>* got;
2387 unsigned int r_sym;
2388
2389 got = target->got_section(symtab, layout);
2390 r_sym = elfcpp::elf_r_sym<size>(reloc.get_r_info());
2391
2392 // If we are generating a shared object, we need to add a
2393 // dynamic relocation for this symbol's GOT entry.
2394 if (parameters->options().output_is_position_independent())
2395 {
2396 if (!object->local_has_got_offset(r_sym, GOT_TYPE_STANDARD))
2397 {
2398 Reloc_section* rela_dyn = target->rela_dyn_section(layout);
2399 unsigned int off = got->add_constant(0);
2400 object->set_local_got_offset(r_sym, GOT_TYPE_STANDARD, off);
2401 rela_dyn->add_local_relative(object, r_sym,
2402 elfcpp::R_SPARC_RELATIVE,
2403 got, off, 0, is_ifunc);
2404 }
2405 }
2406 else
2407 got->add_local(object, r_sym, GOT_TYPE_STANDARD);
2408 }
2409 break;
2410
2411 // These are initial TLS relocs, which are expected when
2412 // linking.
2413 case elfcpp::R_SPARC_TLS_GD_HI22: // Global-dynamic
2414 case elfcpp::R_SPARC_TLS_GD_LO10:
2415 case elfcpp::R_SPARC_TLS_GD_ADD:
2416 case elfcpp::R_SPARC_TLS_GD_CALL:
2417 case elfcpp::R_SPARC_TLS_LDM_HI22 : // Local-dynamic
2418 case elfcpp::R_SPARC_TLS_LDM_LO10:
2419 case elfcpp::R_SPARC_TLS_LDM_ADD:
2420 case elfcpp::R_SPARC_TLS_LDM_CALL:
2421 case elfcpp::R_SPARC_TLS_LDO_HIX22: // Alternate local-dynamic
2422 case elfcpp::R_SPARC_TLS_LDO_LOX10:
2423 case elfcpp::R_SPARC_TLS_LDO_ADD:
2424 case elfcpp::R_SPARC_TLS_IE_HI22: // Initial-exec
2425 case elfcpp::R_SPARC_TLS_IE_LO10:
2426 case elfcpp::R_SPARC_TLS_IE_LD:
2427 case elfcpp::R_SPARC_TLS_IE_LDX:
2428 case elfcpp::R_SPARC_TLS_IE_ADD:
2429 case elfcpp::R_SPARC_TLS_LE_HIX22: // Local-exec
2430 case elfcpp::R_SPARC_TLS_LE_LOX10:
2431 {
2432 bool output_is_shared = parameters->options().shared();
2433 const tls::Tls_optimization optimized_type
2434 = optimize_tls_reloc(!output_is_shared, r_type);
2435 switch (r_type)
2436 {
2437 case elfcpp::R_SPARC_TLS_GD_HI22: // Global-dynamic
2438 case elfcpp::R_SPARC_TLS_GD_LO10:
2439 case elfcpp::R_SPARC_TLS_GD_ADD:
2440 case elfcpp::R_SPARC_TLS_GD_CALL:
2441 if (optimized_type == tls::TLSOPT_NONE)
2442 {
2443 // Create a pair of GOT entries for the module index and
2444 // dtv-relative offset.
2445 Output_data_got<size, big_endian>* got
2446 = target->got_section(symtab, layout);
2447 unsigned int r_sym = elfcpp::elf_r_sym<size>(reloc.get_r_info());
2448 unsigned int shndx = lsym.get_st_shndx();
2449 bool is_ordinary;
2450 shndx = object->adjust_sym_shndx(r_sym, shndx, &is_ordinary);
2451 if (!is_ordinary)
2452 object->error(_("local symbol %u has bad shndx %u"),
2453 r_sym, shndx);
2454 else
2455 got->add_local_pair_with_rel(object, r_sym,
2456 lsym.get_st_shndx(),
2457 GOT_TYPE_TLS_PAIR,
2458 target->rela_dyn_section(layout),
2459 (size == 64
2460 ? elfcpp::R_SPARC_TLS_DTPMOD64
2461 : elfcpp::R_SPARC_TLS_DTPMOD32));
2462 if (r_type == elfcpp::R_SPARC_TLS_GD_CALL)
2463 generate_tls_call(symtab, layout, target);
2464 }
2465 else if (optimized_type != tls::TLSOPT_TO_LE)
2466 unsupported_reloc_local(object, r_type);
2467 break;
2468
2469 case elfcpp::R_SPARC_TLS_LDM_HI22 : // Local-dynamic
2470 case elfcpp::R_SPARC_TLS_LDM_LO10:
2471 case elfcpp::R_SPARC_TLS_LDM_ADD:
2472 case elfcpp::R_SPARC_TLS_LDM_CALL:
2473 if (optimized_type == tls::TLSOPT_NONE)
2474 {
2475 // Create a GOT entry for the module index.
2476 target->got_mod_index_entry(symtab, layout, object);
2477
2478 if (r_type == elfcpp::R_SPARC_TLS_LDM_CALL)
2479 generate_tls_call(symtab, layout, target);
2480 }
2481 else if (optimized_type != tls::TLSOPT_TO_LE)
2482 unsupported_reloc_local(object, r_type);
2483 break;
2484
2485 case elfcpp::R_SPARC_TLS_LDO_HIX22: // Alternate local-dynamic
2486 case elfcpp::R_SPARC_TLS_LDO_LOX10:
2487 case elfcpp::R_SPARC_TLS_LDO_ADD:
2488 break;
2489
2490 case elfcpp::R_SPARC_TLS_IE_HI22: // Initial-exec
2491 case elfcpp::R_SPARC_TLS_IE_LO10:
2492 case elfcpp::R_SPARC_TLS_IE_LD:
2493 case elfcpp::R_SPARC_TLS_IE_LDX:
2494 case elfcpp::R_SPARC_TLS_IE_ADD:
2495 layout->set_has_static_tls();
2496 if (optimized_type == tls::TLSOPT_NONE)
2497 {
2498 // Create a GOT entry for the tp-relative offset.
2499 Output_data_got<size, big_endian>* got
2500 = target->got_section(symtab, layout);
2501 unsigned int r_sym = elfcpp::elf_r_sym<size>(reloc.get_r_info());
2502
2503 if (!object->local_has_got_offset(r_sym, GOT_TYPE_TLS_OFFSET))
2504 {
2505 Reloc_section* rela_dyn = target->rela_dyn_section(layout);
2506 unsigned int off = got->add_constant(0);
2507
2508 object->set_local_got_offset(r_sym, GOT_TYPE_TLS_OFFSET, off);
2509
2510 rela_dyn->add_symbolless_local_addend(object, r_sym,
2511 (size == 64 ?
2512 elfcpp::R_SPARC_TLS_TPOFF64 :
2513 elfcpp::R_SPARC_TLS_TPOFF32),
2514 got, off, 0);
2515 }
2516 }
2517 else if (optimized_type != tls::TLSOPT_TO_LE)
2518 unsupported_reloc_local(object, r_type);
2519 break;
2520
2521 case elfcpp::R_SPARC_TLS_LE_HIX22: // Local-exec
2522 case elfcpp::R_SPARC_TLS_LE_LOX10:
2523 layout->set_has_static_tls();
2524 if (output_is_shared)
2525 {
2526 // We need to create a dynamic relocation.
2527 gold_assert(lsym.get_st_type() != elfcpp::STT_SECTION);
2528 unsigned int r_sym = elfcpp::elf_r_sym<size>(reloc.get_r_info());
2529 Reloc_section* rela_dyn = target->rela_dyn_section(layout);
2530 rela_dyn->add_symbolless_local_addend(object, r_sym, r_type,
2531 output_section, data_shndx,
2532 reloc.get_r_offset(), 0);
2533 }
2534 break;
2535 }
2536 }
2537 break;
2538
2539 // These are relocations which should only be seen by the
2540 // dynamic linker, and should never be seen here.
2541 case elfcpp::R_SPARC_COPY:
2542 case elfcpp::R_SPARC_GLOB_DAT:
2543 case elfcpp::R_SPARC_JMP_SLOT:
2544 case elfcpp::R_SPARC_JMP_IREL:
2545 case elfcpp::R_SPARC_RELATIVE:
2546 case elfcpp::R_SPARC_IRELATIVE:
2547 case elfcpp::R_SPARC_TLS_DTPMOD64:
2548 case elfcpp::R_SPARC_TLS_DTPMOD32:
2549 case elfcpp::R_SPARC_TLS_DTPOFF64:
2550 case elfcpp::R_SPARC_TLS_DTPOFF32:
2551 case elfcpp::R_SPARC_TLS_TPOFF64:
2552 case elfcpp::R_SPARC_TLS_TPOFF32:
2553 gold_error(_("%s: unexpected reloc %u in object file"),
2554 object->name().c_str(), r_type);
2555 break;
2556
2557 default:
2558 unsupported_reloc_local(object, r_type);
2559 break;
2560 }
2561 }
2562
2563 // Report an unsupported relocation against a global symbol.
2564
2565 template<int size, bool big_endian>
2566 void
2567 Target_sparc<size, big_endian>::Scan::unsupported_reloc_global(
2568 Sized_relobj_file<size, big_endian>* object,
2569 unsigned int r_type,
2570 Symbol* gsym)
2571 {
2572 gold_error(_("%s: unsupported reloc %u against global symbol %s"),
2573 object->name().c_str(), r_type, gsym->demangled_name().c_str());
2574 }
2575
2576 // Scan a relocation for a global symbol.
2577
2578 template<int size, bool big_endian>
2579 inline void
2580 Target_sparc<size, big_endian>::Scan::global(
2581 Symbol_table* symtab,
2582 Layout* layout,
2583 Target_sparc<size, big_endian>* target,
2584 Sized_relobj_file<size, big_endian>* object,
2585 unsigned int data_shndx,
2586 Output_section* output_section,
2587 const elfcpp::Rela<size, big_endian>& reloc,
2588 unsigned int r_type,
2589 Symbol* gsym)
2590 {
2591 unsigned int orig_r_type = r_type;
2592 bool is_ifunc = gsym->type() == elfcpp::STT_GNU_IFUNC;
2593
2594 // A reference to _GLOBAL_OFFSET_TABLE_ implies that we need a got
2595 // section. We check here to avoid creating a dynamic reloc against
2596 // _GLOBAL_OFFSET_TABLE_.
2597 if (!target->has_got_section()
2598 && strcmp(gsym->name(), "_GLOBAL_OFFSET_TABLE_") == 0)
2599 target->got_section(symtab, layout);
2600
2601 r_type &= 0xff;
2602
2603 // A STT_GNU_IFUNC symbol may require a PLT entry.
2604 if (is_ifunc
2605 && this->reloc_needs_plt_for_ifunc(object, r_type))
2606 target->make_plt_entry(symtab, layout, gsym);
2607
2608 switch (r_type)
2609 {
2610 case elfcpp::R_SPARC_NONE:
2611 case elfcpp::R_SPARC_REGISTER:
2612 case elfcpp::R_SPARC_GNU_VTINHERIT:
2613 case elfcpp::R_SPARC_GNU_VTENTRY:
2614 break;
2615
2616 case elfcpp::R_SPARC_PLT64:
2617 case elfcpp::R_SPARC_PLT32:
2618 case elfcpp::R_SPARC_HIPLT22:
2619 case elfcpp::R_SPARC_LOPLT10:
2620 case elfcpp::R_SPARC_PCPLT32:
2621 case elfcpp::R_SPARC_PCPLT22:
2622 case elfcpp::R_SPARC_PCPLT10:
2623 case elfcpp::R_SPARC_WPLT30:
2624 // If the symbol is fully resolved, this is just a PC32 reloc.
2625 // Otherwise we need a PLT entry.
2626 if (gsym->final_value_is_known())
2627 break;
2628 // If building a shared library, we can also skip the PLT entry
2629 // if the symbol is defined in the output file and is protected
2630 // or hidden.
2631 if (gsym->is_defined()
2632 && !gsym->is_from_dynobj()
2633 && !gsym->is_preemptible())
2634 break;
2635 target->make_plt_entry(symtab, layout, gsym);
2636 break;
2637
2638 case elfcpp::R_SPARC_DISP8:
2639 case elfcpp::R_SPARC_DISP16:
2640 case elfcpp::R_SPARC_DISP32:
2641 case elfcpp::R_SPARC_DISP64:
2642 case elfcpp::R_SPARC_PC_HH22:
2643 case elfcpp::R_SPARC_PC_HM10:
2644 case elfcpp::R_SPARC_PC_LM22:
2645 case elfcpp::R_SPARC_PC10:
2646 case elfcpp::R_SPARC_PC22:
2647 case elfcpp::R_SPARC_WDISP30:
2648 case elfcpp::R_SPARC_WDISP22:
2649 case elfcpp::R_SPARC_WDISP19:
2650 case elfcpp::R_SPARC_WDISP16:
2651 case elfcpp::R_SPARC_WDISP10:
2652 {
2653 if (gsym->needs_plt_entry())
2654 target->make_plt_entry(symtab, layout, gsym);
2655 // Make a dynamic relocation if necessary.
2656 if (gsym->needs_dynamic_reloc(Scan::get_reference_flags(r_type)))
2657 {
2658 if (parameters->options().output_is_executable()
2659 && gsym->may_need_copy_reloc())
2660 {
2661 target->copy_reloc(symtab, layout, object,
2662 data_shndx, output_section, gsym,
2663 reloc);
2664 }
2665 else
2666 {
2667 Reloc_section* rela_dyn = target->rela_dyn_section(layout);
2668 check_non_pic(object, r_type);
2669 rela_dyn->add_global(gsym, orig_r_type, output_section, object,
2670 data_shndx, reloc.get_r_offset(),
2671 reloc.get_r_addend());
2672 }
2673 }
2674 }
2675 break;
2676
2677 case elfcpp::R_SPARC_UA64:
2678 case elfcpp::R_SPARC_64:
2679 case elfcpp::R_SPARC_HIX22:
2680 case elfcpp::R_SPARC_LOX10:
2681 case elfcpp::R_SPARC_H34:
2682 case elfcpp::R_SPARC_H44:
2683 case elfcpp::R_SPARC_M44:
2684 case elfcpp::R_SPARC_L44:
2685 case elfcpp::R_SPARC_HH22:
2686 case elfcpp::R_SPARC_HM10:
2687 case elfcpp::R_SPARC_LM22:
2688 case elfcpp::R_SPARC_HI22:
2689 case elfcpp::R_SPARC_LO10:
2690 case elfcpp::R_SPARC_OLO10:
2691 case elfcpp::R_SPARC_UA32:
2692 case elfcpp::R_SPARC_32:
2693 case elfcpp::R_SPARC_UA16:
2694 case elfcpp::R_SPARC_16:
2695 case elfcpp::R_SPARC_11:
2696 case elfcpp::R_SPARC_10:
2697 case elfcpp::R_SPARC_8:
2698 case elfcpp::R_SPARC_7:
2699 case elfcpp::R_SPARC_6:
2700 case elfcpp::R_SPARC_5:
2701 {
2702 // Make a PLT entry if necessary.
2703 if (gsym->needs_plt_entry())
2704 {
2705 target->make_plt_entry(symtab, layout, gsym);
2706 // Since this is not a PC-relative relocation, we may be
2707 // taking the address of a function. In that case we need to
2708 // set the entry in the dynamic symbol table to the address of
2709 // the PLT entry.
2710 if (gsym->is_from_dynobj() && !parameters->options().shared())
2711 gsym->set_needs_dynsym_value();
2712 }
2713 // Make a dynamic relocation if necessary.
2714 if (gsym->needs_dynamic_reloc(Scan::get_reference_flags(r_type)))
2715 {
2716 unsigned int r_off = reloc.get_r_offset();
2717
2718 // The assembler can sometimes emit unaligned relocations
2719 // for dwarf2 cfi directives.
2720 switch (r_type)
2721 {
2722 case elfcpp::R_SPARC_16:
2723 if (r_off & 0x1)
2724 orig_r_type = r_type = elfcpp::R_SPARC_UA16;
2725 break;
2726 case elfcpp::R_SPARC_32:
2727 if (r_off & 0x3)
2728 orig_r_type = r_type = elfcpp::R_SPARC_UA32;
2729 break;
2730 case elfcpp::R_SPARC_64:
2731 if (r_off & 0x7)
2732 orig_r_type = r_type = elfcpp::R_SPARC_UA64;
2733 break;
2734 case elfcpp::R_SPARC_UA16:
2735 if (!(r_off & 0x1))
2736 orig_r_type = r_type = elfcpp::R_SPARC_16;
2737 break;
2738 case elfcpp::R_SPARC_UA32:
2739 if (!(r_off & 0x3))
2740 orig_r_type = r_type = elfcpp::R_SPARC_32;
2741 break;
2742 case elfcpp::R_SPARC_UA64:
2743 if (!(r_off & 0x7))
2744 orig_r_type = r_type = elfcpp::R_SPARC_64;
2745 break;
2746 }
2747
2748 if (!parameters->options().output_is_position_independent()
2749 && gsym->may_need_copy_reloc())
2750 {
2751 target->copy_reloc(symtab, layout, object,
2752 data_shndx, output_section, gsym, reloc);
2753 }
2754 else if (((size == 64 && r_type == elfcpp::R_SPARC_64)
2755 || (size == 32 && r_type == elfcpp::R_SPARC_32))
2756 && gsym->type() == elfcpp::STT_GNU_IFUNC
2757 && gsym->can_use_relative_reloc(false)
2758 && !gsym->is_from_dynobj()
2759 && !gsym->is_undefined()
2760 && !gsym->is_preemptible())
2761 {
2762 // Use an IRELATIVE reloc for a locally defined
2763 // STT_GNU_IFUNC symbol. This makes a function
2764 // address in a PIE executable match the address in a
2765 // shared library that it links against.
2766 Reloc_section* rela_dyn =
2767 target->rela_ifunc_section(layout);
2768 unsigned int r_type = elfcpp::R_SPARC_IRELATIVE;
2769 rela_dyn->add_symbolless_global_addend(gsym, r_type,
2770 output_section, object,
2771 data_shndx,
2772 reloc.get_r_offset(),
2773 reloc.get_r_addend());
2774 }
2775 else if (((size == 64 && r_type == elfcpp::R_SPARC_64)
2776 || (size == 32 && r_type == elfcpp::R_SPARC_32))
2777 && gsym->can_use_relative_reloc(false))
2778 {
2779 Reloc_section* rela_dyn = target->rela_dyn_section(layout);
2780 rela_dyn->add_global_relative(gsym, elfcpp::R_SPARC_RELATIVE,
2781 output_section, object,
2782 data_shndx, reloc.get_r_offset(),
2783 reloc.get_r_addend(), is_ifunc);
2784 }
2785 else
2786 {
2787 Reloc_section* rela_dyn = target->rela_dyn_section(layout);
2788
2789 check_non_pic(object, r_type);
2790 if (gsym->is_from_dynobj()
2791 || gsym->is_undefined()
2792 || gsym->is_preemptible())
2793 rela_dyn->add_global(gsym, orig_r_type, output_section,
2794 object, data_shndx,
2795 reloc.get_r_offset(),
2796 reloc.get_r_addend());
2797 else
2798 rela_dyn->add_symbolless_global_addend(gsym, orig_r_type,
2799 output_section,
2800 object, data_shndx,
2801 reloc.get_r_offset(),
2802 reloc.get_r_addend());
2803 }
2804 }
2805 }
2806 break;
2807
2808 case elfcpp::R_SPARC_GOTDATA_OP:
2809 case elfcpp::R_SPARC_GOTDATA_OP_HIX22:
2810 case elfcpp::R_SPARC_GOTDATA_OP_LOX10:
2811 if (gsym->is_defined()
2812 && !gsym->is_from_dynobj()
2813 && !gsym->is_preemptible()
2814 && !is_ifunc)
2815 {
2816 // We will optimize this into a GOT relative relocation
2817 // and code transform the GOT load into an addition.
2818 break;
2819 }
2820 // Fall through.
2821 case elfcpp::R_SPARC_GOT10:
2822 case elfcpp::R_SPARC_GOT13:
2823 case elfcpp::R_SPARC_GOT22:
2824 {
2825 // The symbol requires a GOT entry.
2826 Output_data_got<size, big_endian>* got;
2827
2828 got = target->got_section(symtab, layout);
2829 if (gsym->final_value_is_known())
2830 {
2831 // For a STT_GNU_IFUNC symbol we want the PLT address.
2832 if (gsym->type() == elfcpp::STT_GNU_IFUNC)
2833 got->add_global_plt(gsym, GOT_TYPE_STANDARD);
2834 else
2835 got->add_global(gsym, GOT_TYPE_STANDARD);
2836 }
2837 else
2838 {
2839 // If this symbol is not fully resolved, we need to add a
2840 // GOT entry with a dynamic relocation.
2841 bool is_ifunc = gsym->type() == elfcpp::STT_GNU_IFUNC;
2842
2843 // Use a GLOB_DAT rather than a RELATIVE reloc if:
2844 //
2845 // 1) The symbol may be defined in some other module.
2846 //
2847 // 2) We are building a shared library and this is a
2848 // protected symbol; using GLOB_DAT means that the dynamic
2849 // linker can use the address of the PLT in the main
2850 // executable when appropriate so that function address
2851 // comparisons work.
2852 //
2853 // 3) This is a STT_GNU_IFUNC symbol in position dependent
2854 // code, again so that function address comparisons work.
2855 Reloc_section* rela_dyn = target->rela_dyn_section(layout);
2856 if (gsym->is_from_dynobj()
2857 || gsym->is_undefined()
2858 || gsym->is_preemptible()
2859 || (gsym->visibility() == elfcpp::STV_PROTECTED
2860 && parameters->options().shared())
2861 || (gsym->type() == elfcpp::STT_GNU_IFUNC
2862 && parameters->options().output_is_position_independent()
2863 && !gsym->is_forced_local()))
2864 {
2865 unsigned int r_type = elfcpp::R_SPARC_GLOB_DAT;
2866
2867 // If this symbol is forced local, this relocation will
2868 // not work properly. That's because ld.so on sparc
2869 // (and 32-bit powerpc) expects st_value in the r_addend
2870 // of relocations for STB_LOCAL symbols. Curiously the
2871 // BFD linker does not promote global hidden symbols to be
2872 // STB_LOCAL in the dynamic symbol table like Gold does.
2873 gold_assert(!gsym->is_forced_local());
2874 got->add_global_with_rel(gsym, GOT_TYPE_STANDARD, rela_dyn,
2875 r_type);
2876 }
2877 else if (!gsym->has_got_offset(GOT_TYPE_STANDARD))
2878 {
2879 unsigned int off = got->add_constant(0);
2880
2881 gsym->set_got_offset(GOT_TYPE_STANDARD, off);
2882 if (is_ifunc)
2883 {
2884 // Tell the dynamic linker to use the PLT address
2885 // when resolving relocations.
2886 if (gsym->is_from_dynobj()
2887 && !parameters->options().shared())
2888 gsym->set_needs_dynsym_value();
2889 }
2890 rela_dyn->add_global_relative(gsym, elfcpp::R_SPARC_RELATIVE,
2891 got, off, 0, is_ifunc);
2892 }
2893 }
2894 }
2895 break;
2896
2897 // These are initial tls relocs, which are expected when
2898 // linking.
2899 case elfcpp::R_SPARC_TLS_GD_HI22: // Global-dynamic
2900 case elfcpp::R_SPARC_TLS_GD_LO10:
2901 case elfcpp::R_SPARC_TLS_GD_ADD:
2902 case elfcpp::R_SPARC_TLS_GD_CALL:
2903 case elfcpp::R_SPARC_TLS_LDM_HI22: // Local-dynamic
2904 case elfcpp::R_SPARC_TLS_LDM_LO10:
2905 case elfcpp::R_SPARC_TLS_LDM_ADD:
2906 case elfcpp::R_SPARC_TLS_LDM_CALL:
2907 case elfcpp::R_SPARC_TLS_LDO_HIX22: // Alternate local-dynamic
2908 case elfcpp::R_SPARC_TLS_LDO_LOX10:
2909 case elfcpp::R_SPARC_TLS_LDO_ADD:
2910 case elfcpp::R_SPARC_TLS_LE_HIX22:
2911 case elfcpp::R_SPARC_TLS_LE_LOX10:
2912 case elfcpp::R_SPARC_TLS_IE_HI22: // Initial-exec
2913 case elfcpp::R_SPARC_TLS_IE_LO10:
2914 case elfcpp::R_SPARC_TLS_IE_LD:
2915 case elfcpp::R_SPARC_TLS_IE_LDX:
2916 case elfcpp::R_SPARC_TLS_IE_ADD:
2917 {
2918 const bool is_final = gsym->final_value_is_known();
2919 const tls::Tls_optimization optimized_type
2920 = optimize_tls_reloc(is_final, r_type);
2921 switch (r_type)
2922 {
2923 case elfcpp::R_SPARC_TLS_GD_HI22: // Global-dynamic
2924 case elfcpp::R_SPARC_TLS_GD_LO10:
2925 case elfcpp::R_SPARC_TLS_GD_ADD:
2926 case elfcpp::R_SPARC_TLS_GD_CALL:
2927 if (optimized_type == tls::TLSOPT_NONE)
2928 {
2929 // Create a pair of GOT entries for the module index and
2930 // dtv-relative offset.
2931 Output_data_got<size, big_endian>* got
2932 = target->got_section(symtab, layout);
2933 got->add_global_pair_with_rel(gsym, GOT_TYPE_TLS_PAIR,
2934 target->rela_dyn_section(layout),
2935 (size == 64
2936 ? elfcpp::R_SPARC_TLS_DTPMOD64
2937 : elfcpp::R_SPARC_TLS_DTPMOD32),
2938 (size == 64
2939 ? elfcpp::R_SPARC_TLS_DTPOFF64
2940 : elfcpp::R_SPARC_TLS_DTPOFF32));
2941
2942 // Emit R_SPARC_WPLT30 against "__tls_get_addr"
2943 if (r_type == elfcpp::R_SPARC_TLS_GD_CALL)
2944 generate_tls_call(symtab, layout, target);
2945 }
2946 else if (optimized_type == tls::TLSOPT_TO_IE)
2947 {
2948 // Create a GOT entry for the tp-relative offset.
2949 Output_data_got<size, big_endian>* got
2950 = target->got_section(symtab, layout);
2951 got->add_global_with_rel(gsym, GOT_TYPE_TLS_OFFSET,
2952 target->rela_dyn_section(layout),
2953 (size == 64 ?
2954 elfcpp::R_SPARC_TLS_TPOFF64 :
2955 elfcpp::R_SPARC_TLS_TPOFF32));
2956 }
2957 else if (optimized_type != tls::TLSOPT_TO_LE)
2958 unsupported_reloc_global(object, r_type, gsym);
2959 break;
2960
2961 case elfcpp::R_SPARC_TLS_LDM_HI22: // Local-dynamic
2962 case elfcpp::R_SPARC_TLS_LDM_LO10:
2963 case elfcpp::R_SPARC_TLS_LDM_ADD:
2964 case elfcpp::R_SPARC_TLS_LDM_CALL:
2965 if (optimized_type == tls::TLSOPT_NONE)
2966 {
2967 // Create a GOT entry for the module index.
2968 target->got_mod_index_entry(symtab, layout, object);
2969
2970 if (r_type == elfcpp::R_SPARC_TLS_LDM_CALL)
2971 generate_tls_call(symtab, layout, target);
2972 }
2973 else if (optimized_type != tls::TLSOPT_TO_LE)
2974 unsupported_reloc_global(object, r_type, gsym);
2975 break;
2976
2977 case elfcpp::R_SPARC_TLS_LDO_HIX22: // Alternate local-dynamic
2978 case elfcpp::R_SPARC_TLS_LDO_LOX10:
2979 case elfcpp::R_SPARC_TLS_LDO_ADD:
2980 break;
2981
2982 case elfcpp::R_SPARC_TLS_LE_HIX22:
2983 case elfcpp::R_SPARC_TLS_LE_LOX10:
2984 layout->set_has_static_tls();
2985 if (parameters->options().shared())
2986 {
2987 Reloc_section* rela_dyn = target->rela_dyn_section(layout);
2988 rela_dyn->add_symbolless_global_addend(gsym, orig_r_type,
2989 output_section, object,
2990 data_shndx, reloc.get_r_offset(),
2991 0);
2992 }
2993 break;
2994
2995 case elfcpp::R_SPARC_TLS_IE_HI22: // Initial-exec
2996 case elfcpp::R_SPARC_TLS_IE_LO10:
2997 case elfcpp::R_SPARC_TLS_IE_LD:
2998 case elfcpp::R_SPARC_TLS_IE_LDX:
2999 case elfcpp::R_SPARC_TLS_IE_ADD:
3000 layout->set_has_static_tls();
3001 if (optimized_type == tls::TLSOPT_NONE)
3002 {
3003 // Create a GOT entry for the tp-relative offset.
3004 Output_data_got<size, big_endian>* got
3005 = target->got_section(symtab, layout);
3006 got->add_global_with_rel(gsym, GOT_TYPE_TLS_OFFSET,
3007 target->rela_dyn_section(layout),
3008 (size == 64
3009 ? elfcpp::R_SPARC_TLS_TPOFF64
3010 : elfcpp::R_SPARC_TLS_TPOFF32));
3011 }
3012 else if (optimized_type != tls::TLSOPT_TO_LE)
3013 unsupported_reloc_global(object, r_type, gsym);
3014 break;
3015 }
3016 }
3017 break;
3018
3019 // These are relocations which should only be seen by the
3020 // dynamic linker, and should never be seen here.
3021 case elfcpp::R_SPARC_COPY:
3022 case elfcpp::R_SPARC_GLOB_DAT:
3023 case elfcpp::R_SPARC_JMP_SLOT:
3024 case elfcpp::R_SPARC_JMP_IREL:
3025 case elfcpp::R_SPARC_RELATIVE:
3026 case elfcpp::R_SPARC_IRELATIVE:
3027 case elfcpp::R_SPARC_TLS_DTPMOD64:
3028 case elfcpp::R_SPARC_TLS_DTPMOD32:
3029 case elfcpp::R_SPARC_TLS_DTPOFF64:
3030 case elfcpp::R_SPARC_TLS_DTPOFF32:
3031 case elfcpp::R_SPARC_TLS_TPOFF64:
3032 case elfcpp::R_SPARC_TLS_TPOFF32:
3033 gold_error(_("%s: unexpected reloc %u in object file"),
3034 object->name().c_str(), r_type);
3035 break;
3036
3037 default:
3038 unsupported_reloc_global(object, r_type, gsym);
3039 break;
3040 }
3041 }
3042
3043 // Make a new symbol table entry.
3044 // STT_SPARC_REGISTER symbols require special handling,
3045 // so we intercept these symbols and keep track of them separately.
3046 // We will resolve register symbols here and output them at symbol
3047 // finalization time.
3048
3049 template<int size, bool big_endian>
3050 Sized_symbol<size>*
3051 Target_sparc<size, big_endian>::make_symbol(const char* name,
3052 elfcpp::STT type,
3053 Object* object,
3054 unsigned int shndx,
3055 uint64_t value)
3056 {
3057 // REGISTER symbols are used only on SPARC-64.
3058 if (size == 64 && type == elfcpp::STT_SPARC_REGISTER)
3059 {
3060 // Ignore REGISTER symbols in dynamic objects.
3061 if (object->is_dynamic())
3062 return NULL;
3063 // Only registers 2, 3, 6, and 7 can be declared global.
3064 int reg = value;
3065 switch (reg)
3066 {
3067 case 2: case 3:
3068 reg -= 2;
3069 break;
3070 case 6: case 7:
3071 reg -= 4;
3072 break;
3073 default:
3074 gold_error(_("%s: only registers %%g[2367] can be declared "
3075 "using STT_REGISTER"),
3076 object->name().c_str());
3077 return NULL;
3078 }
3079 Register_symbol& rsym = this->register_syms_[reg];
3080 if (rsym.name == NULL)
3081 {
3082 rsym.name = name;
3083 rsym.shndx = shndx;
3084 rsym.obj = object;
3085 }
3086 else
3087 {
3088 if (strcmp(rsym.name, name) != 0)
3089 {
3090 gold_error(_("%s: register %%g%d declared as '%s'; "
3091 "previously declared as '%s' in %s"),
3092 object->name().c_str(),
3093 static_cast<int>(value),
3094 *name ? name : "#scratch",
3095 *rsym.name ? rsym.name : "#scratch",
3096 rsym.obj->name().c_str());
3097 return NULL;
3098 }
3099 }
3100 return NULL;
3101 }
3102 return new Sized_symbol<size>();
3103 }
3104
3105 // Process relocations for gc.
3106
3107 template<int size, bool big_endian>
3108 void
3109 Target_sparc<size, big_endian>::gc_process_relocs(
3110 Symbol_table* symtab,
3111 Layout* layout,
3112 Sized_relobj_file<size, big_endian>* object,
3113 unsigned int data_shndx,
3114 unsigned int,
3115 const unsigned char* prelocs,
3116 size_t reloc_count,
3117 Output_section* output_section,
3118 bool needs_special_offset_handling,
3119 size_t local_symbol_count,
3120 const unsigned char* plocal_symbols)
3121 {
3122 typedef Target_sparc<size, big_endian> Sparc;
3123 typedef typename Target_sparc<size, big_endian>::Scan Scan;
3124 typedef gold::Default_classify_reloc<elfcpp::SHT_RELA, size, big_endian>
3125 Classify_reloc;
3126
3127 gold::gc_process_relocs<size, big_endian, Sparc, Scan, Classify_reloc>(
3128 symtab,
3129 layout,
3130 this,
3131 object,
3132 data_shndx,
3133 prelocs,
3134 reloc_count,
3135 output_section,
3136 needs_special_offset_handling,
3137 local_symbol_count,
3138 plocal_symbols);
3139 }
3140
3141 // Scan relocations for a section.
3142
3143 template<int size, bool big_endian>
3144 void
3145 Target_sparc<size, big_endian>::scan_relocs(
3146 Symbol_table* symtab,
3147 Layout* layout,
3148 Sized_relobj_file<size, big_endian>* object,
3149 unsigned int data_shndx,
3150 unsigned int sh_type,
3151 const unsigned char* prelocs,
3152 size_t reloc_count,
3153 Output_section* output_section,
3154 bool needs_special_offset_handling,
3155 size_t local_symbol_count,
3156 const unsigned char* plocal_symbols)
3157 {
3158 typedef Target_sparc<size, big_endian> Sparc;
3159 typedef gold::Default_classify_reloc<elfcpp::SHT_RELA, size, big_endian>
3160 Classify_reloc;
3161
3162 if (sh_type == elfcpp::SHT_REL)
3163 {
3164 gold_error(_("%s: unsupported REL reloc section"),
3165 object->name().c_str());
3166 return;
3167 }
3168
3169 gold::scan_relocs<size, big_endian, Sparc, Scan, Classify_reloc>(
3170 symtab,
3171 layout,
3172 this,
3173 object,
3174 data_shndx,
3175 prelocs,
3176 reloc_count,
3177 output_section,
3178 needs_special_offset_handling,
3179 local_symbol_count,
3180 plocal_symbols);
3181 }
3182
3183 // Finalize the sections.
3184
3185 template<int size, bool big_endian>
3186 void
3187 Target_sparc<size, big_endian>::do_finalize_sections(
3188 Layout* layout,
3189 const Input_objects*,
3190 Symbol_table* symtab)
3191 {
3192 if (this->plt_)
3193 this->plt_->emit_pending_ifunc_relocs();
3194
3195 // Fill in some more dynamic tags.
3196 const Reloc_section* rel_plt = (this->plt_ == NULL
3197 ? NULL
3198 : this->plt_->rel_plt());
3199 layout->add_target_dynamic_tags(false, this->plt_, rel_plt,
3200 this->rela_dyn_, true, true);
3201
3202 // Emit any relocs we saved in an attempt to avoid generating COPY
3203 // relocs.
3204 if (this->copy_relocs_.any_saved_relocs())
3205 this->copy_relocs_.emit(this->rela_dyn_section(layout));
3206
3207 if (parameters->doing_static_link()
3208 && (this->plt_ == NULL || !this->plt_->has_ifunc_section()))
3209 {
3210 // If linking statically, make sure that the __rela_iplt symbols
3211 // were defined if necessary, even if we didn't create a PLT.
3212 static const Define_symbol_in_segment syms[] =
3213 {
3214 {
3215 "__rela_iplt_start", // name
3216 elfcpp::PT_LOAD, // segment_type
3217 elfcpp::PF_W, // segment_flags_set
3218 elfcpp::PF(0), // segment_flags_clear
3219 0, // value
3220 0, // size
3221 elfcpp::STT_NOTYPE, // type
3222 elfcpp::STB_GLOBAL, // binding
3223 elfcpp::STV_HIDDEN, // visibility
3224 0, // nonvis
3225 Symbol::SEGMENT_START, // offset_from_base
3226 true // only_if_ref
3227 },
3228 {
3229 "__rela_iplt_end", // name
3230 elfcpp::PT_LOAD, // segment_type
3231 elfcpp::PF_W, // segment_flags_set
3232 elfcpp::PF(0), // segment_flags_clear
3233 0, // value
3234 0, // size
3235 elfcpp::STT_NOTYPE, // type
3236 elfcpp::STB_GLOBAL, // binding
3237 elfcpp::STV_HIDDEN, // visibility
3238 0, // nonvis
3239 Symbol::SEGMENT_START, // offset_from_base
3240 true // only_if_ref
3241 }
3242 };
3243
3244 symtab->define_symbols(layout, 2, syms,
3245 layout->script_options()->saw_sections_clause());
3246 }
3247
3248 for (int reg = 0; reg < 4; ++reg)
3249 {
3250 Register_symbol& rsym = this->register_syms_[reg];
3251 if (rsym.name != NULL)
3252 {
3253 int value = reg < 3 ? reg + 2 : reg + 4;
3254 Sized_symbol<size>* sym = new Sized_symbol<size>();
3255 if (rsym.shndx == elfcpp::SHN_UNDEF)
3256 sym->init_undefined(rsym.name, NULL, value,
3257 elfcpp::STT_SPARC_REGISTER, elfcpp::STB_GLOBAL,
3258 elfcpp::STV_DEFAULT, 0);
3259 else
3260 sym->init_constant(rsym.name, NULL, value, 0,
3261 elfcpp::STT_SPARC_REGISTER, elfcpp::STB_GLOBAL,
3262 elfcpp::STV_DEFAULT, 0, false);
3263 symtab->add_target_global_symbol(sym);
3264 layout->add_target_specific_dynamic_tag(elfcpp::DT_SPARC_REGISTER,
3265 value);
3266 }
3267 }
3268 }
3269
3270 // Perform a relocation.
3271
3272 template<int size, bool big_endian>
3273 inline bool
3274 Target_sparc<size, big_endian>::Relocate::relocate(
3275 const Relocate_info<size, big_endian>* relinfo,
3276 unsigned int,
3277 Target_sparc* target,
3278 Output_section*,
3279 size_t relnum,
3280 const unsigned char* preloc,
3281 const Sized_symbol<size>* gsym,
3282 const Symbol_value<size>* psymval,
3283 unsigned char* view,
3284 typename elfcpp::Elf_types<size>::Elf_Addr address,
3285 section_size_type view_size)
3286 {
3287 const elfcpp::Rela<size, big_endian> rela(preloc);
3288 unsigned int r_type = elfcpp::elf_r_type<size>(rela.get_r_info());
3289 bool orig_is_ifunc = psymval->is_ifunc_symbol();
3290 r_type &= 0xff;
3291
3292 if (this->ignore_gd_add_)
3293 {
3294 if (r_type != elfcpp::R_SPARC_TLS_GD_ADD)
3295 gold_error_at_location(relinfo, relnum, rela.get_r_offset(),
3296 _("missing expected TLS relocation"));
3297 else
3298 {
3299 this->ignore_gd_add_ = false;
3300 return false;
3301 }
3302 }
3303
3304 if (view == NULL)
3305 return true;
3306
3307 if (this->reloc_adjust_addr_ == view)
3308 view -= 4;
3309
3310 typedef Sparc_relocate_functions<size, big_endian> Reloc;
3311 const Sized_relobj_file<size, big_endian>* object = relinfo->object;
3312
3313 // Pick the value to use for symbols defined in shared objects.
3314 Symbol_value<size> symval;
3315 if (gsym != NULL
3316 && gsym->use_plt_offset(Scan::get_reference_flags(r_type)))
3317 {
3318 elfcpp::Elf_Xword value;
3319
3320 value = target->plt_address_for_global(gsym);
3321
3322 symval.set_output_value(value);
3323
3324 psymval = &symval;
3325 }
3326 else if (gsym == NULL && orig_is_ifunc)
3327 {
3328 unsigned int r_sym = elfcpp::elf_r_sym<size>(rela.get_r_info());
3329 if (object->local_has_plt_offset(r_sym))
3330 {
3331 symval.set_output_value(target->plt_address_for_local(object, r_sym));
3332 psymval = &symval;
3333 }
3334 }
3335
3336 const elfcpp::Elf_Xword addend = rela.get_r_addend();
3337
3338 // Get the GOT offset if needed. Unlike i386 and x86_64, our GOT
3339 // pointer points to the beginning, not the end, of the table.
3340 // So we just use the plain offset.
3341 unsigned int got_offset = 0;
3342 bool gdop_valid = false;
3343 switch (r_type)
3344 {
3345 case elfcpp::R_SPARC_GOTDATA_OP:
3346 case elfcpp::R_SPARC_GOTDATA_OP_HIX22:
3347 case elfcpp::R_SPARC_GOTDATA_OP_LOX10:
3348 // If this is local, we did not create a GOT entry because we
3349 // intend to transform this into a GOT relative relocation.
3350 if (gsym == NULL
3351 || (gsym->is_defined()
3352 && !gsym->is_from_dynobj()
3353 && !gsym->is_preemptible()
3354 && !orig_is_ifunc))
3355 {
3356 got_offset = psymval->value(object, addend) - target->got_address();
3357 gdop_valid = true;
3358 break;
3359 }
3360 // Fall through.
3361 case elfcpp::R_SPARC_GOT10:
3362 case elfcpp::R_SPARC_GOT13:
3363 case elfcpp::R_SPARC_GOT22:
3364 if (gsym != NULL)
3365 {
3366 gold_assert(gsym->has_got_offset(GOT_TYPE_STANDARD));
3367 got_offset = gsym->got_offset(GOT_TYPE_STANDARD);
3368 }
3369 else
3370 {
3371 unsigned int r_sym = elfcpp::elf_r_sym<size>(rela.get_r_info());
3372 gold_assert(object->local_has_got_offset(r_sym, GOT_TYPE_STANDARD));
3373 got_offset = object->local_got_offset(r_sym, GOT_TYPE_STANDARD);
3374 }
3375 break;
3376
3377 default:
3378 break;
3379 }
3380
3381 switch (r_type)
3382 {
3383 case elfcpp::R_SPARC_NONE:
3384 case elfcpp::R_SPARC_REGISTER:
3385 case elfcpp::R_SPARC_GNU_VTINHERIT:
3386 case elfcpp::R_SPARC_GNU_VTENTRY:
3387 break;
3388
3389 case elfcpp::R_SPARC_8:
3390 Relocate_functions<size, big_endian>::rela8(view, object,
3391 psymval, addend);
3392 break;
3393
3394 case elfcpp::R_SPARC_16:
3395 if (rela.get_r_offset() & 0x1)
3396 {
3397 // The assembler can sometimes emit unaligned relocations
3398 // for dwarf2 cfi directives.
3399 Reloc::ua16(view, object, psymval, addend);
3400 }
3401 else
3402 Relocate_functions<size, big_endian>::rela16(view, object,
3403 psymval, addend);
3404 break;
3405
3406 case elfcpp::R_SPARC_32:
3407 if (!parameters->options().output_is_position_independent())
3408 {
3409 if (rela.get_r_offset() & 0x3)
3410 {
3411 // The assembler can sometimes emit unaligned relocations
3412 // for dwarf2 cfi directives.
3413 Reloc::ua32(view, object, psymval, addend);
3414 }
3415 else
3416 Relocate_functions<size, big_endian>::rela32(view, object,
3417 psymval, addend);
3418 }
3419 break;
3420
3421 case elfcpp::R_SPARC_DISP8:
3422 Reloc::disp8(view, object, psymval, addend, address);
3423 break;
3424
3425 case elfcpp::R_SPARC_DISP16:
3426 Reloc::disp16(view, object, psymval, addend, address);
3427 break;
3428
3429 case elfcpp::R_SPARC_DISP32:
3430 Reloc::disp32(view, object, psymval, addend, address);
3431 break;
3432
3433 case elfcpp::R_SPARC_DISP64:
3434 Reloc::disp64(view, object, psymval, addend, address);
3435 break;
3436
3437 case elfcpp::R_SPARC_WDISP30:
3438 case elfcpp::R_SPARC_WPLT30:
3439 Reloc::wdisp30(view, object, psymval, addend, address);
3440 if (target->may_relax())
3441 relax_call(target, view, rela, view_size);
3442 break;
3443
3444 case elfcpp::R_SPARC_WDISP22:
3445 Reloc::wdisp22(view, object, psymval, addend, address);
3446 break;
3447
3448 case elfcpp::R_SPARC_WDISP19:
3449 Reloc::wdisp19(view, object, psymval, addend, address);
3450 break;
3451
3452 case elfcpp::R_SPARC_WDISP16:
3453 Reloc::wdisp16(view, object, psymval, addend, address);
3454 break;
3455
3456 case elfcpp::R_SPARC_WDISP10:
3457 Reloc::wdisp10(view, object, psymval, addend, address);
3458 break;
3459
3460 case elfcpp::R_SPARC_HI22:
3461 Reloc::hi22(view, object, psymval, addend);
3462 break;
3463
3464 case elfcpp::R_SPARC_22:
3465 Reloc::rela32_22(view, object, psymval, addend);
3466 break;
3467
3468 case elfcpp::R_SPARC_13:
3469 Reloc::rela32_13(view, object, psymval, addend);
3470 break;
3471
3472 case elfcpp::R_SPARC_LO10:
3473 Reloc::lo10(view, object, psymval, addend);
3474 break;
3475
3476 case elfcpp::R_SPARC_GOTDATA_OP_LOX10:
3477 if (gdop_valid)
3478 {
3479 Reloc::gdop_lox10(view, got_offset);
3480 break;
3481 }
3482 // Fall through.
3483 case elfcpp::R_SPARC_GOT10:
3484 Reloc::lo10(view, got_offset, addend);
3485 break;
3486
3487 case elfcpp::R_SPARC_GOTDATA_OP:
3488 if (gdop_valid)
3489 {
3490 typedef typename elfcpp::Swap<32, true>::Valtype Insntype;
3491 Insntype* wv = reinterpret_cast<Insntype*>(view);
3492 Insntype val;
3493
3494 // {ld,ldx} [%rs1 + %rs2], %rd --> add %rs1, %rs2, %rd
3495 val = elfcpp::Swap<32, true>::readval(wv);
3496 val = 0x80000000 | (val & 0x3e07c01f);
3497 elfcpp::Swap<32, true>::writeval(wv, val);
3498 }
3499 break;
3500
3501 case elfcpp::R_SPARC_GOT13:
3502 Reloc::rela32_13(view, got_offset, addend);
3503 break;
3504
3505 case elfcpp::R_SPARC_GOTDATA_OP_HIX22:
3506 if (gdop_valid)
3507 {
3508 Reloc::gdop_hix22(view, got_offset);
3509 break;
3510 }
3511 // Fall through.
3512 case elfcpp::R_SPARC_GOT22:
3513 Reloc::hi22(view, got_offset, addend);
3514 break;
3515
3516 case elfcpp::R_SPARC_PC10:
3517 Reloc::pc10(view, object, psymval, addend, address);
3518 break;
3519
3520 case elfcpp::R_SPARC_PC22:
3521 Reloc::pc22(view, object, psymval, addend, address);
3522 break;
3523
3524 case elfcpp::R_SPARC_TLS_DTPOFF32:
3525 case elfcpp::R_SPARC_UA32:
3526 Reloc::ua32(view, object, psymval, addend);
3527 break;
3528
3529 case elfcpp::R_SPARC_PLT64:
3530 Relocate_functions<size, big_endian>::rela64(view, object,
3531 psymval, addend);
3532 break;
3533
3534 case elfcpp::R_SPARC_PLT32:
3535 Relocate_functions<size, big_endian>::rela32(view, object,
3536 psymval, addend);
3537 break;
3538
3539 case elfcpp::R_SPARC_HIPLT22:
3540 Reloc::hi22(view, object, psymval, addend);
3541 break;
3542
3543 case elfcpp::R_SPARC_LOPLT10:
3544 Reloc::lo10(view, object, psymval, addend);
3545 break;
3546
3547 case elfcpp::R_SPARC_PCPLT32:
3548 Reloc::disp32(view, object, psymval, addend, address);
3549 break;
3550
3551 case elfcpp::R_SPARC_PCPLT22:
3552 Reloc::pcplt22(view, object, psymval, addend, address);
3553 break;
3554
3555 case elfcpp::R_SPARC_PCPLT10:
3556 Reloc::lo10(view, object, psymval, addend, address);
3557 break;
3558
3559 case elfcpp::R_SPARC_64:
3560 if (!parameters->options().output_is_position_independent())
3561 {
3562 if (rela.get_r_offset() & 0x7)
3563 {
3564 // The assembler can sometimes emit unaligned relocations
3565 // for dwarf2 cfi directives.
3566 Reloc::ua64(view, object, psymval, addend);
3567 }
3568 else
3569 Relocate_functions<size, big_endian>::rela64(view, object,
3570 psymval, addend);
3571 }
3572 break;
3573
3574 case elfcpp::R_SPARC_OLO10:
3575 {
3576 unsigned int addend2 = rela.get_r_info() & 0xffffffff;
3577 addend2 = ((addend2 >> 8) ^ 0x800000) - 0x800000;
3578 Reloc::olo10(view, object, psymval, addend, addend2);
3579 }
3580 break;
3581
3582 case elfcpp::R_SPARC_HH22:
3583 Reloc::hh22(view, object, psymval, addend);
3584 break;
3585
3586 case elfcpp::R_SPARC_PC_HH22:
3587 Reloc::pc_hh22(view, object, psymval, addend, address);
3588 break;
3589
3590 case elfcpp::R_SPARC_HM10:
3591 Reloc::hm10(view, object, psymval, addend);
3592 break;
3593
3594 case elfcpp::R_SPARC_PC_HM10:
3595 Reloc::pc_hm10(view, object, psymval, addend, address);
3596 break;
3597
3598 case elfcpp::R_SPARC_LM22:
3599 Reloc::hi22(view, object, psymval, addend);
3600 break;
3601
3602 case elfcpp::R_SPARC_PC_LM22:
3603 Reloc::pcplt22(view, object, psymval, addend, address);
3604 break;
3605
3606 case elfcpp::R_SPARC_11:
3607 Reloc::rela32_11(view, object, psymval, addend);
3608 break;
3609
3610 case elfcpp::R_SPARC_10:
3611 Reloc::rela32_10(view, object, psymval, addend);
3612 break;
3613
3614 case elfcpp::R_SPARC_7:
3615 Reloc::rela32_7(view, object, psymval, addend);
3616 break;
3617
3618 case elfcpp::R_SPARC_6:
3619 Reloc::rela32_6(view, object, psymval, addend);
3620 break;
3621
3622 case elfcpp::R_SPARC_5:
3623 Reloc::rela32_5(view, object, psymval, addend);
3624 break;
3625
3626 case elfcpp::R_SPARC_HIX22:
3627 Reloc::hix22(view, object, psymval, addend);
3628 break;
3629
3630 case elfcpp::R_SPARC_LOX10:
3631 Reloc::lox10(view, object, psymval, addend);
3632 break;
3633
3634 case elfcpp::R_SPARC_H34:
3635 Reloc::h34(view, object, psymval, addend);
3636 break;
3637
3638 case elfcpp::R_SPARC_H44:
3639 Reloc::h44(view, object, psymval, addend);
3640 break;
3641
3642 case elfcpp::R_SPARC_M44:
3643 Reloc::m44(view, object, psymval, addend);
3644 break;
3645
3646 case elfcpp::R_SPARC_L44:
3647 Reloc::l44(view, object, psymval, addend);
3648 break;
3649
3650 case elfcpp::R_SPARC_TLS_DTPOFF64:
3651 case elfcpp::R_SPARC_UA64:
3652 Reloc::ua64(view, object, psymval, addend);
3653 break;
3654
3655 case elfcpp::R_SPARC_UA16:
3656 Reloc::ua16(view, object, psymval, addend);
3657 break;
3658
3659 case elfcpp::R_SPARC_TLS_GD_HI22:
3660 case elfcpp::R_SPARC_TLS_GD_LO10:
3661 case elfcpp::R_SPARC_TLS_GD_ADD:
3662 case elfcpp::R_SPARC_TLS_GD_CALL:
3663 case elfcpp::R_SPARC_TLS_LDM_HI22:
3664 case elfcpp::R_SPARC_TLS_LDM_LO10:
3665 case elfcpp::R_SPARC_TLS_LDM_ADD:
3666 case elfcpp::R_SPARC_TLS_LDM_CALL:
3667 case elfcpp::R_SPARC_TLS_LDO_HIX22:
3668 case elfcpp::R_SPARC_TLS_LDO_LOX10:
3669 case elfcpp::R_SPARC_TLS_LDO_ADD:
3670 case elfcpp::R_SPARC_TLS_IE_HI22:
3671 case elfcpp::R_SPARC_TLS_IE_LO10:
3672 case elfcpp::R_SPARC_TLS_IE_LD:
3673 case elfcpp::R_SPARC_TLS_IE_LDX:
3674 case elfcpp::R_SPARC_TLS_IE_ADD:
3675 case elfcpp::R_SPARC_TLS_LE_HIX22:
3676 case elfcpp::R_SPARC_TLS_LE_LOX10:
3677 this->relocate_tls(relinfo, target, relnum, rela,
3678 r_type, gsym, psymval, view,
3679 address, view_size);
3680 break;
3681
3682 case elfcpp::R_SPARC_COPY:
3683 case elfcpp::R_SPARC_GLOB_DAT:
3684 case elfcpp::R_SPARC_JMP_SLOT:
3685 case elfcpp::R_SPARC_JMP_IREL:
3686 case elfcpp::R_SPARC_RELATIVE:
3687 case elfcpp::R_SPARC_IRELATIVE:
3688 // These are outstanding tls relocs, which are unexpected when
3689 // linking.
3690 case elfcpp::R_SPARC_TLS_DTPMOD64:
3691 case elfcpp::R_SPARC_TLS_DTPMOD32:
3692 case elfcpp::R_SPARC_TLS_TPOFF64:
3693 case elfcpp::R_SPARC_TLS_TPOFF32:
3694 gold_error_at_location(relinfo, relnum, rela.get_r_offset(),
3695 _("unexpected reloc %u in object file"),
3696 r_type);
3697 break;
3698
3699 default:
3700 gold_error_at_location(relinfo, relnum, rela.get_r_offset(),
3701 _("unsupported reloc %u"),
3702 r_type);
3703 break;
3704 }
3705
3706 return true;
3707 }
3708
3709 // Perform a TLS relocation.
3710
3711 template<int size, bool big_endian>
3712 inline void
3713 Target_sparc<size, big_endian>::Relocate::relocate_tls(
3714 const Relocate_info<size, big_endian>* relinfo,
3715 Target_sparc<size, big_endian>* target,
3716 size_t relnum,
3717 const elfcpp::Rela<size, big_endian>& rela,
3718 unsigned int r_type,
3719 const Sized_symbol<size>* gsym,
3720 const Symbol_value<size>* psymval,
3721 unsigned char* view,
3722 typename elfcpp::Elf_types<size>::Elf_Addr address,
3723 section_size_type)
3724 {
3725 Output_segment* tls_segment = relinfo->layout->tls_segment();
3726 typedef Sparc_relocate_functions<size, big_endian> Reloc;
3727 const Sized_relobj_file<size, big_endian>* object = relinfo->object;
3728 typedef typename elfcpp::Swap<32, true>::Valtype Insntype;
3729
3730 const elfcpp::Elf_Xword addend = rela.get_r_addend();
3731 typename elfcpp::Elf_types<size>::Elf_Addr value = psymval->value(object, 0);
3732
3733 const bool is_final =
3734 (gsym == NULL
3735 ? !parameters->options().shared()
3736 : gsym->final_value_is_known());
3737 const tls::Tls_optimization optimized_type
3738 = optimize_tls_reloc(is_final, r_type);
3739
3740 switch (r_type)
3741 {
3742 case elfcpp::R_SPARC_TLS_GD_HI22:
3743 case elfcpp::R_SPARC_TLS_GD_LO10:
3744 case elfcpp::R_SPARC_TLS_GD_ADD:
3745 case elfcpp::R_SPARC_TLS_GD_CALL:
3746 if (optimized_type == tls::TLSOPT_TO_LE)
3747 {
3748 Insntype* wv = reinterpret_cast<Insntype*>(view);
3749 Insntype val;
3750
3751 value -= tls_segment->memsz();
3752
3753 switch (r_type)
3754 {
3755 case elfcpp::R_SPARC_TLS_GD_HI22:
3756 // TLS_GD_HI22 --> TLS_LE_HIX22
3757 Reloc::hix22(view, value, addend);
3758 break;
3759
3760 case elfcpp::R_SPARC_TLS_GD_LO10:
3761 // TLS_GD_LO10 --> TLS_LE_LOX10
3762 Reloc::lox10(view, value, addend);
3763 break;
3764
3765 case elfcpp::R_SPARC_TLS_GD_ADD:
3766 // add %reg1, %reg2, %reg3 --> mov %g7, %reg2, %reg3
3767 val = elfcpp::Swap<32, true>::readval(wv);
3768 val = (val & ~0x7c000) | 0x1c000;
3769 elfcpp::Swap<32, true>::writeval(wv, val);
3770 break;
3771 case elfcpp::R_SPARC_TLS_GD_CALL:
3772 // call __tls_get_addr --> nop
3773 elfcpp::Swap<32, true>::writeval(wv, sparc_nop);
3774 break;
3775 }
3776 break;
3777 }
3778 else
3779 {
3780 unsigned int got_type = (optimized_type == tls::TLSOPT_TO_IE
3781 ? GOT_TYPE_TLS_OFFSET
3782 : GOT_TYPE_TLS_PAIR);
3783 if (gsym != NULL)
3784 {
3785 gold_assert(gsym->has_got_offset(got_type));
3786 value = gsym->got_offset(got_type);
3787 }
3788 else
3789 {
3790 unsigned int r_sym = elfcpp::elf_r_sym<size>(rela.get_r_info());
3791 gold_assert(object->local_has_got_offset(r_sym, got_type));
3792 value = object->local_got_offset(r_sym, got_type);
3793 }
3794 if (optimized_type == tls::TLSOPT_TO_IE)
3795 {
3796 Insntype* wv = reinterpret_cast<Insntype*>(view);
3797 Insntype val;
3798
3799 switch (r_type)
3800 {
3801 case elfcpp::R_SPARC_TLS_GD_HI22:
3802 // TLS_GD_HI22 --> TLS_IE_HI22
3803 Reloc::hi22(view, value, addend);
3804 break;
3805
3806 case elfcpp::R_SPARC_TLS_GD_LO10:
3807 // TLS_GD_LO10 --> TLS_IE_LO10
3808 Reloc::lo10(view, value, addend);
3809 break;
3810
3811 case elfcpp::R_SPARC_TLS_GD_ADD:
3812 // add %reg1, %reg2, %reg3 --> ld [%reg1 + %reg2], %reg3
3813 val = elfcpp::Swap<32, true>::readval(wv);
3814
3815 if (size == 64)
3816 val |= 0xc0580000;
3817 else
3818 val |= 0xc0000000;
3819
3820 elfcpp::Swap<32, true>::writeval(wv, val);
3821 break;
3822
3823 case elfcpp::R_SPARC_TLS_GD_CALL:
3824 // The compiler can put the TLS_GD_ADD instruction
3825 // into the delay slot of the call. If so, we need
3826 // to transpose the two instructions so that the
3827 // new sequence works properly.
3828 //
3829 // The test we use is if the instruction in the
3830 // delay slot is an add with destination register
3831 // equal to %o0
3832 val = elfcpp::Swap<32, true>::readval(wv + 1);
3833 if ((val & 0x81f80000) == 0x80000000
3834 && ((val >> 25) & 0x1f) == 0x8)
3835 {
3836 if (size == 64)
3837 val |= 0xc0580000;
3838 else
3839 val |= 0xc0000000;
3840
3841 elfcpp::Swap<32, true>::writeval(wv, val);
3842
3843 wv += 1;
3844 this->ignore_gd_add_ = true;
3845 }
3846 else
3847 {
3848 // Even if the delay slot isn't the TLS_GD_ADD
3849 // instruction, we still have to handle the case
3850 // where it sets up %o0 in some other way.
3851 elfcpp::Swap<32, true>::writeval(wv, val);
3852 wv += 1;
3853 this->reloc_adjust_addr_ = view + 4;
3854 }
3855 // call __tls_get_addr --> add %g7, %o0, %o0
3856 elfcpp::Swap<32, true>::writeval(wv, 0x9001c008);
3857 break;
3858 }
3859 break;
3860 }
3861 else if (optimized_type == tls::TLSOPT_NONE)
3862 {
3863 switch (r_type)
3864 {
3865 case elfcpp::R_SPARC_TLS_GD_HI22:
3866 Reloc::hi22(view, value, addend);
3867 break;
3868 case elfcpp::R_SPARC_TLS_GD_LO10:
3869 Reloc::lo10(view, value, addend);
3870 break;
3871 case elfcpp::R_SPARC_TLS_GD_ADD:
3872 break;
3873 case elfcpp::R_SPARC_TLS_GD_CALL:
3874 {
3875 Symbol_value<size> symval;
3876 elfcpp::Elf_Xword value;
3877 Symbol* tsym;
3878
3879 tsym = target->tls_get_addr_sym_;
3880 gold_assert(tsym);
3881 value = (target->plt_section()->address() +
3882 tsym->plt_offset());
3883 symval.set_output_value(value);
3884 Reloc::wdisp30(view, object, &symval, addend, address);
3885 }
3886 break;
3887 }
3888 break;
3889 }
3890 }
3891 gold_error_at_location(relinfo, relnum, rela.get_r_offset(),
3892 _("unsupported reloc %u"),
3893 r_type);
3894 break;
3895
3896 case elfcpp::R_SPARC_TLS_LDM_HI22:
3897 case elfcpp::R_SPARC_TLS_LDM_LO10:
3898 case elfcpp::R_SPARC_TLS_LDM_ADD:
3899 case elfcpp::R_SPARC_TLS_LDM_CALL:
3900 if (optimized_type == tls::TLSOPT_TO_LE)
3901 {
3902 Insntype* wv = reinterpret_cast<Insntype*>(view);
3903
3904 switch (r_type)
3905 {
3906 case elfcpp::R_SPARC_TLS_LDM_HI22:
3907 case elfcpp::R_SPARC_TLS_LDM_LO10:
3908 case elfcpp::R_SPARC_TLS_LDM_ADD:
3909 elfcpp::Swap<32, true>::writeval(wv, sparc_nop);
3910 break;
3911
3912 case elfcpp::R_SPARC_TLS_LDM_CALL:
3913 elfcpp::Swap<32, true>::writeval(wv, sparc_mov_g0_o0);
3914 break;
3915 }
3916 break;
3917 }
3918 else if (optimized_type == tls::TLSOPT_NONE)
3919 {
3920 // Relocate the field with the offset of the GOT entry for
3921 // the module index.
3922 unsigned int got_offset;
3923
3924 got_offset = target->got_mod_index_entry(NULL, NULL, NULL);
3925 switch (r_type)
3926 {
3927 case elfcpp::R_SPARC_TLS_LDM_HI22:
3928 Reloc::hi22(view, got_offset, addend);
3929 break;
3930 case elfcpp::R_SPARC_TLS_LDM_LO10:
3931 Reloc::lo10(view, got_offset, addend);
3932 break;
3933 case elfcpp::R_SPARC_TLS_LDM_ADD:
3934 break;
3935 case elfcpp::R_SPARC_TLS_LDM_CALL:
3936 {
3937 Symbol_value<size> symval;
3938 elfcpp::Elf_Xword value;
3939 Symbol* tsym;
3940
3941 tsym = target->tls_get_addr_sym_;
3942 gold_assert(tsym);
3943 value = (target->plt_section()->address() +
3944 tsym->plt_offset());
3945 symval.set_output_value(value);
3946 Reloc::wdisp30(view, object, &symval, addend, address);
3947 }
3948 break;
3949 }
3950 break;
3951 }
3952 gold_error_at_location(relinfo, relnum, rela.get_r_offset(),
3953 _("unsupported reloc %u"),
3954 r_type);
3955 break;
3956
3957 // These relocs can appear in debugging sections, in which case
3958 // we won't see the TLS_LDM relocs. The local_dynamic_type
3959 // field tells us this.
3960 case elfcpp::R_SPARC_TLS_LDO_HIX22:
3961 if (optimized_type == tls::TLSOPT_TO_LE)
3962 {
3963 value -= tls_segment->memsz();
3964 Reloc::hix22(view, value, addend);
3965 }
3966 else
3967 Reloc::ldo_hix22(view, value, addend);
3968 break;
3969 case elfcpp::R_SPARC_TLS_LDO_LOX10:
3970 if (optimized_type == tls::TLSOPT_TO_LE)
3971 {
3972 value -= tls_segment->memsz();
3973 Reloc::lox10(view, value, addend);
3974 }
3975 else
3976 Reloc::ldo_lox10(view, value, addend);
3977 break;
3978 case elfcpp::R_SPARC_TLS_LDO_ADD:
3979 if (optimized_type == tls::TLSOPT_TO_LE)
3980 {
3981 Insntype* wv = reinterpret_cast<Insntype*>(view);
3982 Insntype val;
3983
3984 // add %reg1, %reg2, %reg3 --> add %g7, %reg2, %reg3
3985 val = elfcpp::Swap<32, true>::readval(wv);
3986 val = (val & ~0x7c000) | 0x1c000;
3987 elfcpp::Swap<32, true>::writeval(wv, val);
3988 }
3989 break;
3990
3991 // When optimizing IE --> LE, the only relocation that is handled
3992 // differently is R_SPARC_TLS_IE_LD, it is rewritten from
3993 // 'ld{,x} [rs1 + rs2], rd' into 'mov rs2, rd' or simply a NOP is
3994 // rs2 and rd are the same.
3995 case elfcpp::R_SPARC_TLS_IE_LD:
3996 case elfcpp::R_SPARC_TLS_IE_LDX:
3997 if (optimized_type == tls::TLSOPT_TO_LE)
3998 {
3999 Insntype* wv = reinterpret_cast<Insntype*>(view);
4000 Insntype val = elfcpp::Swap<32, true>::readval(wv);
4001 Insntype rs2 = val & 0x1f;
4002 Insntype rd = (val >> 25) & 0x1f;
4003
4004 if (rs2 == rd)
4005 val = sparc_nop;
4006 else
4007 val = sparc_mov | (val & 0x3e00001f);
4008
4009 elfcpp::Swap<32, true>::writeval(wv, val);
4010 }
4011 break;
4012
4013 case elfcpp::R_SPARC_TLS_IE_HI22:
4014 case elfcpp::R_SPARC_TLS_IE_LO10:
4015 if (optimized_type == tls::TLSOPT_TO_LE)
4016 {
4017 value -= tls_segment->memsz();
4018 switch (r_type)
4019 {
4020 case elfcpp::R_SPARC_TLS_IE_HI22:
4021 // IE_HI22 --> LE_HIX22
4022 Reloc::hix22(view, value, addend);
4023 break;
4024 case elfcpp::R_SPARC_TLS_IE_LO10:
4025 // IE_LO10 --> LE_LOX10
4026 Reloc::lox10(view, value, addend);
4027 break;
4028 }
4029 break;
4030 }
4031 else if (optimized_type == tls::TLSOPT_NONE)
4032 {
4033 // Relocate the field with the offset of the GOT entry for
4034 // the tp-relative offset of the symbol.
4035 if (gsym != NULL)
4036 {
4037 gold_assert(gsym->has_got_offset(GOT_TYPE_TLS_OFFSET));
4038 value = gsym->got_offset(GOT_TYPE_TLS_OFFSET);
4039 }
4040 else
4041 {
4042 unsigned int r_sym = elfcpp::elf_r_sym<size>(rela.get_r_info());
4043 gold_assert(object->local_has_got_offset(r_sym,
4044 GOT_TYPE_TLS_OFFSET));
4045 value = object->local_got_offset(r_sym,
4046 GOT_TYPE_TLS_OFFSET);
4047 }
4048 switch (r_type)
4049 {
4050 case elfcpp::R_SPARC_TLS_IE_HI22:
4051 Reloc::hi22(view, value, addend);
4052 break;
4053 case elfcpp::R_SPARC_TLS_IE_LO10:
4054 Reloc::lo10(view, value, addend);
4055 break;
4056 }
4057 break;
4058 }
4059 gold_error_at_location(relinfo, relnum, rela.get_r_offset(),
4060 _("unsupported reloc %u"),
4061 r_type);
4062 break;
4063
4064 case elfcpp::R_SPARC_TLS_IE_ADD:
4065 // This seems to be mainly so that we can find the addition
4066 // instruction if there is one. There doesn't seem to be any
4067 // actual relocation to apply.
4068 break;
4069
4070 case elfcpp::R_SPARC_TLS_LE_HIX22:
4071 // If we're creating a shared library, a dynamic relocation will
4072 // have been created for this location, so do not apply it now.
4073 if (!parameters->options().shared())
4074 {
4075 value -= tls_segment->memsz();
4076 Reloc::hix22(view, value, addend);
4077 }
4078 break;
4079
4080 case elfcpp::R_SPARC_TLS_LE_LOX10:
4081 // If we're creating a shared library, a dynamic relocation will
4082 // have been created for this location, so do not apply it now.
4083 if (!parameters->options().shared())
4084 {
4085 value -= tls_segment->memsz();
4086 Reloc::lox10(view, value, addend);
4087 }
4088 break;
4089 }
4090 }
4091
4092 // Relax a call instruction.
4093
4094 template<int size, bool big_endian>
4095 inline void
4096 Target_sparc<size, big_endian>::Relocate::relax_call(
4097 Target_sparc<size, big_endian>* target,
4098 unsigned char* view,
4099 const elfcpp::Rela<size, big_endian>& rela,
4100 section_size_type view_size)
4101 {
4102 typedef typename elfcpp::Swap<32, true>::Valtype Insntype;
4103 Insntype *wv = reinterpret_cast<Insntype*>(view);
4104 Insntype call_insn, delay_insn, set_insn;
4105 uint32_t op3, reg, off;
4106
4107 // This code tries to relax call instructions that meet
4108 // certain criteria.
4109 //
4110 // The first criteria is that the call must be such that the return
4111 // address which the call writes into %o7 is unused. Two sequences
4112 // meet this criteria, and are used to implement tail calls.
4113 //
4114 // Leaf function tail call:
4115 //
4116 // or %o7, %g0, %ANY_REG
4117 // call FUNC
4118 // or %ANY_REG, %g0, %o7
4119 //
4120 // Non-leaf function tail call:
4121 //
4122 // call FUNC
4123 // restore
4124 //
4125 // The second criteria is that the call destination is close. If
4126 // the displacement can fit in a signed 22-bit immediate field of a
4127 // pre-V9 branch, we can do it. If we are generating a 64-bit
4128 // object or a 32-bit object with ELF machine type EF_SPARC32PLUS,
4129 // and the displacement fits in a signed 19-bit immediate field,
4130 // then we can use a V9 branch.
4131
4132 // Make sure the delay instruction can be safely accessed.
4133 if (rela.get_r_offset() + 8 > view_size)
4134 return;
4135
4136 call_insn = elfcpp::Swap<32, true>::readval(wv);
4137 delay_insn = elfcpp::Swap<32, true>::readval(wv + 1);
4138
4139 // Make sure it is really a call instruction.
4140 if (((call_insn >> 30) & 0x3) != 1)
4141 return;
4142
4143 if (((delay_insn >> 30) & 0x3) != 2)
4144 return;
4145
4146 // Accept only a restore or an integer arithmetic operation whose
4147 // sole side effect is to write the %o7 register (and perhaps set
4148 // the condition codes, which are considered clobbered across
4149 // function calls).
4150 //
4151 // For example, we don't want to match a tagged addition or
4152 // subtraction. We also don't want to match something like a
4153 // divide.
4154 //
4155 // Specifically we accept add{,cc}, and{,cc}, or{,cc},
4156 // xor{,cc}, sub{,cc}, andn{,cc}, orn{,cc}, and xnor{,cc}.
4157
4158 op3 = (delay_insn >> 19) & 0x3f;
4159 reg = (delay_insn >> 25) & 0x1f;
4160 if (op3 != 0x3d
4161 && ((op3 & 0x28) != 0 || reg != 15))
4162 return;
4163
4164 // For non-restore instructions, make sure %o7 isn't
4165 // an input.
4166 if (op3 != 0x3d)
4167 {
4168 // First check RS1
4169 reg = (delay_insn >> 14) & 0x1f;
4170 if (reg == 15)
4171 return;
4172
4173 // And if non-immediate, check RS2
4174 if (((delay_insn >> 13) & 1) == 0)
4175 {
4176 reg = (delay_insn & 0x1f);
4177 if (reg == 15)
4178 return;
4179 }
4180 }
4181
4182 // Now check the branch distance. We are called after the
4183 // call has been relocated, so we just have to peek at the
4184 // offset contained in the instruction.
4185 off = call_insn & 0x3fffffff;
4186 if ((off & 0x3fe00000) != 0
4187 && (off & 0x3fe00000) != 0x3fe00000)
4188 return;
4189
4190 if ((size == 64 || target->elf_machine_ == elfcpp::EM_SPARC32PLUS)
4191 && ((off & 0x3c0000) == 0
4192 || (off & 0x3c0000) == 0x3c0000))
4193 {
4194 // ba,pt %xcc, FUNC
4195 call_insn = 0x10680000 | (off & 0x07ffff);
4196 }
4197 else
4198 {
4199 // ba FUNC
4200 call_insn = 0x10800000 | (off & 0x3fffff);
4201 }
4202 elfcpp::Swap<32, true>::writeval(wv, call_insn);
4203
4204 // See if we can NOP out the delay slot instruction. We peek
4205 // at the instruction before the call to make sure we're dealing
4206 // with exactly the:
4207 //
4208 // or %o7, %g0, %ANY_REG
4209 // call
4210 // or %ANY_REG, %g0, %o7
4211 //
4212 // case. Otherwise this might be a tricky piece of hand written
4213 // assembler calculating %o7 in some non-trivial way, and therefore
4214 // we can't be sure that NOP'ing out the delay slot is safe.
4215 if (op3 == 0x02
4216 && rela.get_r_offset() >= 4)
4217 {
4218 if ((delay_insn & ~(0x1f << 14)) != 0x9e100000)
4219 return;
4220
4221 set_insn = elfcpp::Swap<32, true>::readval(wv - 1);
4222 if ((set_insn & ~(0x1f << 25)) != 0x8013c000)
4223 return;
4224
4225 reg = (set_insn >> 25) & 0x1f;
4226 if (reg == 0 || reg == 15)
4227 return;
4228 if (reg != ((delay_insn >> 14) & 0x1f))
4229 return;
4230
4231 // All tests pass, nop it out.
4232 elfcpp::Swap<32, true>::writeval(wv + 1, sparc_nop);
4233 }
4234 }
4235
4236 // Relocate section data.
4237
4238 template<int size, bool big_endian>
4239 void
4240 Target_sparc<size, big_endian>::relocate_section(
4241 const Relocate_info<size, big_endian>* relinfo,
4242 unsigned int sh_type,
4243 const unsigned char* prelocs,
4244 size_t reloc_count,
4245 Output_section* output_section,
4246 bool needs_special_offset_handling,
4247 unsigned char* view,
4248 typename elfcpp::Elf_types<size>::Elf_Addr address,
4249 section_size_type view_size,
4250 const Reloc_symbol_changes* reloc_symbol_changes)
4251 {
4252 typedef Target_sparc<size, big_endian> Sparc;
4253 typedef typename Target_sparc<size, big_endian>::Relocate Sparc_relocate;
4254 typedef gold::Default_classify_reloc<elfcpp::SHT_RELA, size, big_endian>
4255 Classify_reloc;
4256
4257 gold_assert(sh_type == elfcpp::SHT_RELA);
4258
4259 gold::relocate_section<size, big_endian, Sparc, Sparc_relocate,
4260 gold::Default_comdat_behavior, Classify_reloc>(
4261 relinfo,
4262 this,
4263 prelocs,
4264 reloc_count,
4265 output_section,
4266 needs_special_offset_handling,
4267 view,
4268 address,
4269 view_size,
4270 reloc_symbol_changes);
4271 }
4272
4273 // Scan the relocs during a relocatable link.
4274
4275 template<int size, bool big_endian>
4276 void
4277 Target_sparc<size, big_endian>::scan_relocatable_relocs(
4278 Symbol_table* symtab,
4279 Layout* layout,
4280 Sized_relobj_file<size, big_endian>* object,
4281 unsigned int data_shndx,
4282 unsigned int sh_type,
4283 const unsigned char* prelocs,
4284 size_t reloc_count,
4285 Output_section* output_section,
4286 bool needs_special_offset_handling,
4287 size_t local_symbol_count,
4288 const unsigned char* plocal_symbols,
4289 Relocatable_relocs* rr)
4290 {
4291 typedef gold::Default_classify_reloc<elfcpp::SHT_RELA, size, big_endian>
4292 Classify_reloc;
4293 typedef gold::Default_scan_relocatable_relocs<Classify_reloc>
4294 Scan_relocatable_relocs;
4295
4296 gold_assert(sh_type == elfcpp::SHT_RELA);
4297
4298 gold::scan_relocatable_relocs<size, big_endian, Scan_relocatable_relocs>(
4299 symtab,
4300 layout,
4301 object,
4302 data_shndx,
4303 prelocs,
4304 reloc_count,
4305 output_section,
4306 needs_special_offset_handling,
4307 local_symbol_count,
4308 plocal_symbols,
4309 rr);
4310 }
4311
4312 // Scan the relocs for --emit-relocs.
4313
4314 template<int size, bool big_endian>
4315 void
4316 Target_sparc<size, big_endian>::emit_relocs_scan(
4317 Symbol_table* symtab,
4318 Layout* layout,
4319 Sized_relobj_file<size, big_endian>* object,
4320 unsigned int data_shndx,
4321 unsigned int sh_type,
4322 const unsigned char* prelocs,
4323 size_t reloc_count,
4324 Output_section* output_section,
4325 bool needs_special_offset_handling,
4326 size_t local_symbol_count,
4327 const unsigned char* plocal_syms,
4328 Relocatable_relocs* rr)
4329 {
4330 typedef gold::Default_classify_reloc<elfcpp::SHT_RELA, size, big_endian>
4331 Classify_reloc;
4332 typedef gold::Default_emit_relocs_strategy<Classify_reloc>
4333 Emit_relocs_strategy;
4334
4335 gold_assert(sh_type == elfcpp::SHT_RELA);
4336
4337 gold::scan_relocatable_relocs<size, big_endian, Emit_relocs_strategy>(
4338 symtab,
4339 layout,
4340 object,
4341 data_shndx,
4342 prelocs,
4343 reloc_count,
4344 output_section,
4345 needs_special_offset_handling,
4346 local_symbol_count,
4347 plocal_syms,
4348 rr);
4349 }
4350
4351 // Emit relocations for a section.
4352
4353 template<int size, bool big_endian>
4354 void
4355 Target_sparc<size, big_endian>::relocate_relocs(
4356 const Relocate_info<size, big_endian>* relinfo,
4357 unsigned int sh_type,
4358 const unsigned char* prelocs,
4359 size_t reloc_count,
4360 Output_section* output_section,
4361 typename elfcpp::Elf_types<size>::Elf_Off offset_in_output_section,
4362 unsigned char* view,
4363 typename elfcpp::Elf_types<size>::Elf_Addr view_address,
4364 section_size_type view_size,
4365 unsigned char* reloc_view,
4366 section_size_type reloc_view_size)
4367 {
4368 typedef gold::Default_classify_reloc<elfcpp::SHT_RELA, size, big_endian>
4369 Classify_reloc;
4370
4371 gold_assert(sh_type == elfcpp::SHT_RELA);
4372
4373 gold::relocate_relocs<size, big_endian, Classify_reloc>(
4374 relinfo,
4375 prelocs,
4376 reloc_count,
4377 output_section,
4378 offset_in_output_section,
4379 view,
4380 view_address,
4381 view_size,
4382 reloc_view,
4383 reloc_view_size);
4384 }
4385
4386 // Return the value to use for a dynamic which requires special
4387 // treatment. This is how we support equality comparisons of function
4388 // pointers across shared library boundaries, as described in the
4389 // processor specific ABI supplement.
4390
4391 template<int size, bool big_endian>
4392 uint64_t
4393 Target_sparc<size, big_endian>::do_dynsym_value(const Symbol* gsym) const
4394 {
4395 gold_assert(gsym->is_from_dynobj() && gsym->has_plt_offset());
4396 return this->plt_section()->address() + gsym->plt_offset();
4397 }
4398
4399 // do_make_elf_object to override the same function in the base class.
4400 // We need to use a target-specific sub-class of
4401 // Sized_relobj_file<size, big_endian> to process SPARC specific bits
4402 // of the ELF headers. Hence we need to have our own ELF object creation.
4403
4404 template<int size, bool big_endian>
4405 Object*
4406 Target_sparc<size, big_endian>::do_make_elf_object(
4407 const std::string& name,
4408 Input_file* input_file,
4409 off_t offset, const elfcpp::Ehdr<size, big_endian>& ehdr)
4410 {
4411 elfcpp::Elf_Half machine = ehdr.get_e_machine();
4412 elfcpp::Elf_Word flags = ehdr.get_e_flags();
4413 elfcpp::Elf_Word omm, mm;
4414
4415 switch (machine)
4416 {
4417 case elfcpp::EM_SPARC32PLUS:
4418 this->elf_machine_ = elfcpp::EM_SPARC32PLUS;
4419 break;
4420
4421 case elfcpp::EM_SPARC:
4422 case elfcpp::EM_SPARCV9:
4423 break;
4424
4425 default:
4426 break;
4427 }
4428
4429 if (!this->elf_flags_set_)
4430 {
4431 this->elf_flags_ = flags;
4432 this->elf_flags_set_ = true;
4433 }
4434 else
4435 {
4436 // Accumulate cpu feature bits.
4437 this->elf_flags_ |= (flags & (elfcpp::EF_SPARC_32PLUS
4438 | elfcpp::EF_SPARC_SUN_US1
4439 | elfcpp::EF_SPARC_HAL_R1
4440 | elfcpp::EF_SPARC_SUN_US3));
4441
4442 // Bump the memory model setting to the most restrictive
4443 // one we encounter.
4444 omm = (this->elf_flags_ & elfcpp::EF_SPARCV9_MM);
4445 mm = (flags & elfcpp::EF_SPARCV9_MM);
4446 if (omm != mm)
4447 {
4448 if (mm == elfcpp::EF_SPARCV9_TSO)
4449 {
4450 this->elf_flags_ &= ~elfcpp::EF_SPARCV9_MM;
4451 this->elf_flags_ |= elfcpp::EF_SPARCV9_TSO;
4452 }
4453 else if (mm == elfcpp::EF_SPARCV9_PSO
4454 && omm == elfcpp::EF_SPARCV9_RMO)
4455 {
4456 this->elf_flags_ &= ~elfcpp::EF_SPARCV9_MM;
4457 this->elf_flags_ |= elfcpp::EF_SPARCV9_PSO;
4458 }
4459 }
4460 }
4461
4462 // Validate that the little-endian flag matches how we've
4463 // been instantiated.
4464 if (!(flags & elfcpp::EF_SPARC_LEDATA) != big_endian)
4465 {
4466 if (big_endian)
4467 gold_error(_("%s: little endian elf flag set on BE object"),
4468 name.c_str());
4469 else
4470 gold_error(_("%s: little endian elf flag clear on LE object"),
4471 name.c_str());
4472 }
4473
4474 return Target::do_make_elf_object(name, input_file, offset, ehdr);
4475 }
4476
4477 // Adjust ELF file header.
4478
4479 template<int size, bool big_endian>
4480 void
4481 Target_sparc<size, big_endian>::do_adjust_elf_header(
4482 unsigned char* view,
4483 int len)
4484 {
4485 elfcpp::Ehdr_write<size, big_endian> oehdr(view);
4486
4487 oehdr.put_e_machine(this->elf_machine_);
4488 oehdr.put_e_flags(this->elf_flags_);
4489
4490 Sized_target<size, big_endian>::do_adjust_elf_header(view, len);
4491 }
4492
4493 // The selector for sparc object files.
4494
4495 template<int size, bool big_endian>
4496 class Target_selector_sparc : public Target_selector
4497 {
4498 public:
4499 Target_selector_sparc()
4500 : Target_selector(elfcpp::EM_NONE, size, big_endian,
4501 (size == 64 ? "elf64-sparc" : "elf32-sparc"),
4502 (size == 64 ? "elf64_sparc" : "elf32_sparc"))
4503 { }
4504
4505 virtual Target*
4506 do_recognize(Input_file*, off_t, int machine, int, int)
4507 {
4508 switch (size)
4509 {
4510 case 64:
4511 if (machine != elfcpp::EM_SPARCV9)
4512 return NULL;
4513 break;
4514
4515 case 32:
4516 if (machine != elfcpp::EM_SPARC
4517 && machine != elfcpp::EM_SPARC32PLUS)
4518 return NULL;
4519 break;
4520
4521 default:
4522 return NULL;
4523 }
4524
4525 return this->instantiate_target();
4526 }
4527
4528 virtual Target*
4529 do_instantiate_target()
4530 { return new Target_sparc<size, big_endian>(); }
4531 };
4532
4533 Target_selector_sparc<32, true> target_selector_sparc32;
4534 Target_selector_sparc<64, true> target_selector_sparc64;
4535
4536 } // End anonymous namespace.
The GNU Binutils are a collection of binary tools.