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* linux-low.c (linux_supports_tracefork_flag): Document.
[deliverable/binutils-gdb.git] / gold / powerpc.cc
CommitLineData
42cacb20
DE		 1// powerpc.cc -- powerpc target support for gold.
2
6d03d481 3// Copyright 2008, 2009 Free Software Foundation, Inc.
42cacb20
DE		 4// Written by David S. Miller <davem@davemloft.net>
5// and David Edelsohn <edelsohn@gnu.org>
6
7// This file is part of gold.
8
9// This program is free software; you can redistribute it and/or modify
10// it under the terms of the GNU General Public License as published by
11// the Free Software Foundation; either version 3 of the License, or
12// (at your option) any later version.
13
14// This program is distributed in the hope that it will be useful,
15// but WITHOUT ANY WARRANTY; without even the implied warranty of
16// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
17// GNU General Public License for more details.
18
19// You should have received a copy of the GNU General Public License
20// along with this program; if not, write to the Free Software
21// Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston,
22// MA 02110-1301, USA.
23
24#include "gold.h"
25
26#include "elfcpp.h"
27#include "parameters.h"
28#include "reloc.h"
29#include "powerpc.h"
30#include "object.h"
31#include "symtab.h"
32#include "layout.h"
33#include "output.h"
34#include "copy-relocs.h"
35#include "target.h"
36#include "target-reloc.h"
37#include "target-select.h"
38#include "tls.h"
39#include "errors.h"
f345227a 40#include "gc.h"
42cacb20
DE		 41
42namespace
43{
44
45using namespace gold;
46
47template<int size, bool big_endian>
48class Output_data_plt_powerpc;
49
50template<int size, bool big_endian>
51class Target_powerpc : public Sized_target<size, big_endian>
52{
53 public:
54 typedef Output_data_reloc<elfcpp::SHT_RELA, true, size, big_endian> Reloc_section;
55
56 Target_powerpc()
57 : Sized_target<size, big_endian>(&powerpc_info),
58 got_(NULL), got2_(NULL), toc_(NULL),
59 plt_(NULL), rela_dyn_(NULL),
60 copy_relocs_(elfcpp::R_POWERPC_COPY),
61 dynbss_(NULL), got_mod_index_offset_(-1U)
62 {
63 }
64
6d03d481
ST		 65 // Process the relocations to determine unreferenced sections for
66 // garbage collection.
67 void
ad0f2072 68 gc_process_relocs(Symbol_table* symtab,
6d03d481
ST		 69 Layout* layout,
70 Sized_relobj<size, big_endian>* object,
71 unsigned int data_shndx,
72 unsigned int sh_type,
73 const unsigned char* prelocs,
74 size_t reloc_count,
75 Output_section* output_section,
76 bool needs_special_offset_handling,
77 size_t local_symbol_count,
78 const unsigned char* plocal_symbols);
79
42cacb20
DE		 80 // Scan the relocations to look for symbol adjustments.
81 void
ad0f2072 82 scan_relocs(Symbol_table* symtab,
42cacb20
DE		 83 Layout* layout,
84 Sized_relobj<size, big_endian>* object,
85 unsigned int data_shndx,
86 unsigned int sh_type,
87 const unsigned char* prelocs,
88 size_t reloc_count,
89 Output_section* output_section,
90 bool needs_special_offset_handling,
91 size_t local_symbol_count,
92 const unsigned char* plocal_symbols);
93 // Finalize the sections.
94 void
f59f41f3 95 do_finalize_sections(Layout*, const Input_objects*, Symbol_table*);
42cacb20
DE		 96
97 // Return the value to use for a dynamic which requires special
98 // treatment.
99 uint64_t
100 do_dynsym_value(const Symbol*) const;
101
102 // Relocate a section.
103 void
104 relocate_section(const Relocate_info<size, big_endian>*,
105 unsigned int sh_type,
106 const unsigned char* prelocs,
107 size_t reloc_count,
108 Output_section* output_section,
109 bool needs_special_offset_handling,
110 unsigned char* view,
111 typename elfcpp::Elf_types<size>::Elf_Addr view_address,
364c7fa5
ILT		 112 section_size_type view_size,
113 const Reloc_symbol_changes*);
42cacb20
DE		 114
115 // Scan the relocs during a relocatable link.
116 void
ad0f2072 117 scan_relocatable_relocs(Symbol_table* symtab,
42cacb20
DE		 118 Layout* layout,
119 Sized_relobj<size, big_endian>* object,
120 unsigned int data_shndx,
121 unsigned int sh_type,
122 const unsigned char* prelocs,
123 size_t reloc_count,
124 Output_section* output_section,
125 bool needs_special_offset_handling,
126 size_t local_symbol_count,
127 const unsigned char* plocal_symbols,
128 Relocatable_relocs*);
129
130 // Relocate a section during a relocatable link.
131 void
132 relocate_for_relocatable(const Relocate_info<size, big_endian>*,
133 unsigned int sh_type,
134 const unsigned char* prelocs,
135 size_t reloc_count,
136 Output_section* output_section,
137 off_t offset_in_output_section,
138 const Relocatable_relocs*,
139 unsigned char* view,
140 typename elfcpp::Elf_types<size>::Elf_Addr view_address,
141 section_size_type view_size,
142 unsigned char* reloc_view,
143 section_size_type reloc_view_size);
144
145 // Return whether SYM is defined by the ABI.
146 bool
9c2d0ef9 147 do_is_defined_by_abi(const Symbol* sym) const
42cacb20
DE		 148 {
149 return strcmp(sym->name(), "___tls_get_addr") == 0;
150 }
151
152 // Return the size of the GOT section.
153 section_size_type
154 got_size()
155 {
156 gold_assert(this->got_ != NULL);
157 return this->got_->data_size();
158 }
159
160 private:
161
162 // The class which scans relocations.
163 class Scan
164 {
165 public:
166 Scan()
167 : issued_non_pic_error_(false)
168 { }
169
170 inline void
ad0f2072 171 local(Symbol_table* symtab, Layout* layout, Target_powerpc* target,
42cacb20
DE		 172 Sized_relobj<size, big_endian>* object,
173 unsigned int data_shndx,
174 Output_section* output_section,
175 const elfcpp::Rela<size, big_endian>& reloc, unsigned int r_type,
176 const elfcpp::Sym<size, big_endian>& lsym);
177
178 inline void
ad0f2072 179 global(Symbol_table* symtab, Layout* layout, Target_powerpc* target,
42cacb20
DE		 180 Sized_relobj<size, big_endian>* object,
181 unsigned int data_shndx,
182 Output_section* output_section,
183 const elfcpp::Rela<size, big_endian>& reloc, unsigned int r_type,
184 Symbol* gsym);
185
186 private:
187 static void
188 unsupported_reloc_local(Sized_relobj<size, big_endian>*,
189 unsigned int r_type);
190
191 static void
192 unsupported_reloc_global(Sized_relobj<size, big_endian>*,
193 unsigned int r_type, Symbol*);
194
195 static void
196 generate_tls_call(Symbol_table* symtab, Layout* layout,
197 Target_powerpc* target);
198
199 void
200 check_non_pic(Relobj*, unsigned int r_type);
201
202 // Whether we have issued an error about a non-PIC compilation.
203 bool issued_non_pic_error_;
204 };
205
206 // The class which implements relocation.
207 class Relocate
208 {
209 public:
210 // Do a relocation. Return false if the caller should not issue
211 // any warnings about this relocation.
212 inline bool
213 relocate(const Relocate_info<size, big_endian>*, Target_powerpc*,
031cdbed
ILT		 214 Output_section*, size_t relnum,
215 const elfcpp::Rela<size, big_endian>&,
42cacb20
DE		 216 unsigned int r_type, const Sized_symbol<size>*,
217 const Symbol_value<size>*,
218 unsigned char*,
219 typename elfcpp::Elf_types<size>::Elf_Addr,
220 section_size_type);
221
222 private:
223 // Do a TLS relocation.
224 inline void
225 relocate_tls(const Relocate_info<size, big_endian>*,
226 Target_powerpc* target,
227 size_t relnum, const elfcpp::Rela<size, big_endian>&,
228 unsigned int r_type, const Sized_symbol<size>*,
229 const Symbol_value<size>*,
230 unsigned char*,
231 typename elfcpp::Elf_types<size>::Elf_Addr,
232 section_size_type);
233 };
234
235 // A class which returns the size required for a relocation type,
236 // used while scanning relocs during a relocatable link.
237 class Relocatable_size_for_reloc
238 {
239 public:
240 unsigned int
241 get_size_for_reloc(unsigned int, Relobj*);
242 };
243
244 // Get the GOT section, creating it if necessary.
245 Output_data_got<size, big_endian>*
246 got_section(Symbol_table*, Layout*);
247
248 Output_data_space*
249 got2_section() const
250 {
251 gold_assert (this->got2_ != NULL);
252 return this->got2_;
253 }
254
255 // Get the TOC section.
256 Output_data_space*
257 toc_section() const
258 {
259 gold_assert (this->toc_ != NULL);
260 return this->toc_;
261 }
262
263 // Create a PLT entry for a global symbol.
264 void
265 make_plt_entry(Symbol_table*, Layout*, Symbol*);
266
267 // Create a GOT entry for the TLS module index.
268 unsigned int
269 got_mod_index_entry(Symbol_table* symtab, Layout* layout,
270 Sized_relobj<size, big_endian>* object);
271
272 // Get the PLT section.
273 const Output_data_plt_powerpc<size, big_endian>*
274 plt_section() const
275 {
276 gold_assert(this->plt_ != NULL);
277 return this->plt_;
278 }
279
280 // Get the dynamic reloc section, creating it if necessary.
281 Reloc_section*
282 rela_dyn_section(Layout*);
283
42cacb20
DE		 284 // Copy a relocation against a global symbol.
285 void
ef9beddf
ILT		 286 copy_reloc(Symbol_table* symtab, Layout* layout,
287 Sized_relobj<size, big_endian>* object,
42cacb20
DE		 288 unsigned int shndx, Output_section* output_section,
289 Symbol* sym, const elfcpp::Rela<size, big_endian>& reloc)
290 {
291 this->copy_relocs_.copy_reloc(symtab, layout,
292 symtab->get_sized_symbol<size>(sym),
293 object, shndx, output_section,
294 reloc, this->rela_dyn_section(layout));
295 }
296
297 // Information about this specific target which we pass to the
298 // general Target structure.
299 static Target::Target_info powerpc_info;
300
301 // The types of GOT entries needed for this platform.
302 enum Got_type
303 {
304 GOT_TYPE_STANDARD = 0, // GOT entry for a regular symbol
305 GOT_TYPE_TLS_OFFSET = 1, // GOT entry for TLS offset
306 GOT_TYPE_TLS_PAIR = 2, // GOT entry for TLS module/offset pair
307 };
308
309 // The GOT section.
310 Output_data_got<size, big_endian>* got_;
311 // The GOT2 section.
312 Output_data_space* got2_;
313 // The TOC section.
314 Output_data_space* toc_;
315 // The PLT section.
316 Output_data_plt_powerpc<size, big_endian>* plt_;
317 // The dynamic reloc section.
318 Reloc_section* rela_dyn_;
319 // Relocs saved to avoid a COPY reloc.
320 Copy_relocs<elfcpp::SHT_RELA, size, big_endian> copy_relocs_;
321 // Space for variables copied with a COPY reloc.
322 Output_data_space* dynbss_;
323 // Offset of the GOT entry for the TLS module index;
324 unsigned int got_mod_index_offset_;
325};
326
327template<>
328Target::Target_info Target_powerpc<32, true>::powerpc_info =
329{
330 32, // size
331 true, // is_big_endian
332 elfcpp::EM_PPC, // machine_code
333 false, // has_make_symbol
334 false, // has_resolve
335 false, // has_code_fill
336 true, // is_default_stack_executable
337 '\0', // wrap_char
338 "/usr/lib/ld.so.1", // dynamic_linker
339 0x10000000, // default_text_segment_address
340 64 * 1024, // abi_pagesize (overridable by -z max-page-size)
8a5e3e08
ILT		 341 4 * 1024, // common_pagesize (overridable by -z common-page-size)
342 elfcpp::SHN_UNDEF, // small_common_shndx
343 elfcpp::SHN_UNDEF, // large_common_shndx
344 0, // small_common_section_flags
05a352e6
DK		 345 0, // large_common_section_flags
346 NULL, // attributes_section
347 NULL // attributes_vendor
42cacb20
DE		 348};
349
350template<>
351Target::Target_info Target_powerpc<32, false>::powerpc_info =
352{
353 32, // size
354 false, // is_big_endian
355 elfcpp::EM_PPC, // machine_code
356 false, // has_make_symbol
357 false, // has_resolve
358 false, // has_code_fill
359 true, // is_default_stack_executable
360 '\0', // wrap_char
361 "/usr/lib/ld.so.1", // dynamic_linker
362 0x10000000, // default_text_segment_address
363 64 * 1024, // abi_pagesize (overridable by -z max-page-size)
8a5e3e08
ILT		 364 4 * 1024, // common_pagesize (overridable by -z common-page-size)
365 elfcpp::SHN_UNDEF, // small_common_shndx
366 elfcpp::SHN_UNDEF, // large_common_shndx
367 0, // small_common_section_flags
05a352e6
DK		 368 0, // large_common_section_flags
369 NULL, // attributes_section
370 NULL // attributes_vendor
42cacb20
DE		 371};
372
373template<>
374Target::Target_info Target_powerpc<64, true>::powerpc_info =
375{
376 64, // size
377 true, // is_big_endian
378 elfcpp::EM_PPC64, // machine_code
379 false, // has_make_symbol
380 false, // has_resolve
381 false, // has_code_fill
382 true, // is_default_stack_executable
383 '\0', // wrap_char
384 "/usr/lib/ld.so.1", // dynamic_linker
385 0x10000000, // default_text_segment_address
386 64 * 1024, // abi_pagesize (overridable by -z max-page-size)
8a5e3e08
ILT		 387 8 * 1024, // common_pagesize (overridable by -z common-page-size)
388 elfcpp::SHN_UNDEF, // small_common_shndx
389 elfcpp::SHN_UNDEF, // large_common_shndx
390 0, // small_common_section_flags
05a352e6
DK		 391 0, // large_common_section_flags
392 NULL, // attributes_section
393 NULL // attributes_vendor
42cacb20
DE		 394};
395
396template<>
397Target::Target_info Target_powerpc<64, false>::powerpc_info =
398{
399 64, // size
400 false, // is_big_endian
401 elfcpp::EM_PPC64, // machine_code
402 false, // has_make_symbol
403 false, // has_resolve
404 false, // has_code_fill
405 true, // is_default_stack_executable
406 '\0', // wrap_char
407 "/usr/lib/ld.so.1", // dynamic_linker
408 0x10000000, // default_text_segment_address
409 64 * 1024, // abi_pagesize (overridable by -z max-page-size)
8a5e3e08
ILT		 410 8 * 1024, // common_pagesize (overridable by -z common-page-size)
411 elfcpp::SHN_UNDEF, // small_common_shndx
412 elfcpp::SHN_UNDEF, // large_common_shndx
413 0, // small_common_section_flags
05a352e6
DK		 414 0, // large_common_section_flags
415 NULL, // attributes_section
416 NULL // attributes_vendor
42cacb20
DE		 417};
418
419template<int size, bool big_endian>
420class Powerpc_relocate_functions
421{
422private:
423 // Do a simple relocation with the addend in the relocation.
424 template<int valsize>
425 static inline void
426 rela(unsigned char* view,
427 unsigned int right_shift,
428 elfcpp::Elf_Xword dst_mask,
429 typename elfcpp::Swap<size, big_endian>::Valtype value,
430 typename elfcpp::Swap<size, big_endian>::Valtype addend)
431 {
432 typedef typename elfcpp::Swap<valsize, big_endian>::Valtype Valtype;
433 Valtype* wv = reinterpret_cast<Valtype*>(view);
434 Valtype val = elfcpp::Swap<valsize, big_endian>::readval(wv);
435 Valtype reloc = ((value + addend) >> right_shift);
436
437 val &= ~dst_mask;
438 reloc &= dst_mask;
439
440 elfcpp::Swap<valsize, big_endian>::writeval(wv, val | reloc);
441 }
442
443 // Do a simple relocation using a symbol value with the addend in
444 // the relocation.
445 template<int valsize>
446 static inline void
447 rela(unsigned char* view,
448 unsigned int right_shift,
449 elfcpp::Elf_Xword dst_mask,
450 const Sized_relobj<size, big_endian>* object,
451 const Symbol_value<size>* psymval,
452 typename elfcpp::Swap<valsize, big_endian>::Valtype addend)
453 {
454 typedef typename elfcpp::Swap<valsize, big_endian>::Valtype Valtype;
455 Valtype* wv = reinterpret_cast<Valtype*>(view);
456 Valtype val = elfcpp::Swap<valsize, big_endian>::readval(wv);
457 Valtype reloc = (psymval->value(object, addend) >> right_shift);
458
459 val &= ~dst_mask;
460 reloc &= dst_mask;
461
462 elfcpp::Swap<valsize, big_endian>::writeval(wv, val | reloc);
463 }
464
465 // Do a simple relocation using a symbol value with the addend in
466 // the relocation, unaligned.
467 template<int valsize>
468 static inline void
469 rela_ua(unsigned char* view, unsigned int right_shift,
470 elfcpp::Elf_Xword dst_mask,
471 const Sized_relobj<size, big_endian>* object,
472 const Symbol_value<size>* psymval,
473 typename elfcpp::Swap<size, big_endian>::Valtype addend)
474 {
475 typedef typename elfcpp::Swap_unaligned<valsize,
476 big_endian>::Valtype Valtype;
477 unsigned char* wv = view;
478 Valtype val = elfcpp::Swap_unaligned<valsize, big_endian>::readval(wv);
479 Valtype reloc = (psymval->value(object, addend) >> right_shift);
480
481 val &= ~dst_mask;
482 reloc &= dst_mask;
483
484 elfcpp::Swap_unaligned<valsize, big_endian>::writeval(wv, val | reloc);
485 }
486
487 // Do a simple PC relative relocation with a Symbol_value with the
488 // addend in the relocation.
489 template<int valsize>
490 static inline void
491 pcrela(unsigned char* view, unsigned int right_shift,
492 elfcpp::Elf_Xword dst_mask,
493 const Sized_relobj<size, big_endian>* object,
494 const Symbol_value<size>* psymval,
495 typename elfcpp::Swap<size, big_endian>::Valtype addend,
496 typename elfcpp::Elf_types<size>::Elf_Addr address)
497 {
498 typedef typename elfcpp::Swap<valsize, big_endian>::Valtype Valtype;
499 Valtype* wv = reinterpret_cast<Valtype*>(view);
500 Valtype val = elfcpp::Swap<valsize, big_endian>::readval(wv);
501 Valtype reloc = ((psymval->value(object, addend) - address)
502 >> right_shift);
503
504 val &= ~dst_mask;
505 reloc &= dst_mask;
506
507 elfcpp::Swap<valsize, big_endian>::writeval(wv, val | reloc);
508 }
509
510 template<int valsize>
511 static inline void
512 pcrela_unaligned(unsigned char* view,
513 const Sized_relobj<size, big_endian>* object,
514 const Symbol_value<size>* psymval,
515 typename elfcpp::Swap<size, big_endian>::Valtype addend,
516 typename elfcpp::Elf_types<size>::Elf_Addr address)
517 {
518 typedef typename elfcpp::Swap_unaligned<valsize,
519 big_endian>::Valtype Valtype;
520 unsigned char* wv = view;
521 Valtype reloc = (psymval->value(object, addend) - address);
522
523 elfcpp::Swap_unaligned<valsize, big_endian>::writeval(wv, reloc);
524 }
525
526 typedef Powerpc_relocate_functions<size, big_endian> This;
527 typedef Relocate_functions<size, big_endian> This_reloc;
528public:
529 // R_POWERPC_REL32: (Symbol + Addend - Address)
530 static inline void
531 rel32(unsigned char* view,
532 const Sized_relobj<size, big_endian>* object,
533 const Symbol_value<size>* psymval,
534 typename elfcpp::Elf_types<size>::Elf_Addr addend,
535 typename elfcpp::Elf_types<size>::Elf_Addr address)
536 { This_reloc::pcrela32(view, object, psymval, addend, address); }
537
538 // R_POWERPC_REL24: (Symbol + Addend - Address) & 0x3fffffc
539 static inline void
540 rel24(unsigned char* view,
541 const Sized_relobj<size, big_endian>* object,
542 const Symbol_value<size>* psymval,
543 typename elfcpp::Elf_types<size>::Elf_Addr addend,
544 typename elfcpp::Elf_types<size>::Elf_Addr address)
545 {
546 This::template pcrela<32>(view, 0, 0x03fffffc, object,
547 psymval, addend, address);
548 }
549
550 // R_POWERPC_REL14: (Symbol + Addend - Address) & 0xfffc
551 static inline void
552 rel14(unsigned char* view,
553 const Sized_relobj<size, big_endian>* object,
554 const Symbol_value<size>* psymval,
555 typename elfcpp::Elf_types<size>::Elf_Addr addend,
556 typename elfcpp::Elf_types<size>::Elf_Addr address)
557 {
558 This::template pcrela<32>(view, 0, 0x0000fffc, object,
559 psymval, addend, address);
560 }
561
562 // R_POWERPC_ADDR16: (Symbol + Addend) & 0xffff
563 static inline void
564 addr16(unsigned char* view,
565 typename elfcpp::Elf_types<size>::Elf_Addr value,
566 typename elfcpp::Elf_types<size>::Elf_Addr addend)
567 { This_reloc::rela16(view, value, addend); }
568
569 static inline void
570 addr16(unsigned char* view,
571 const Sized_relobj<size, big_endian>* object,
572 const Symbol_value<size>* psymval,
573 typename elfcpp::Elf_types<size>::Elf_Addr addend)
574 { This_reloc::rela16(view, object, psymval, addend); }
575
576 // R_POWERPC_ADDR16_DS: (Symbol + Addend) & 0xfffc
577 static inline void
578 addr16_ds(unsigned char* view,
579 typename elfcpp::Elf_types<size>::Elf_Addr value,
580 typename elfcpp::Elf_types<size>::Elf_Addr addend)
581 {
582 This::template rela<16>(view, 0, 0xfffc, value, addend);
583 }
584
585 // R_POWERPC_ADDR16_LO: (Symbol + Addend) & 0xffff
586 static inline void
587 addr16_lo(unsigned char* view,
588 typename elfcpp::Elf_types<size>::Elf_Addr value,
589 typename elfcpp::Elf_types<size>::Elf_Addr addend)
590 { This_reloc::rela16(view, value, addend); }
591
592 static inline void
593 addr16_lo(unsigned char* view,
594 const Sized_relobj<size, big_endian>* object,
595 const Symbol_value<size>* psymval,
596 typename elfcpp::Elf_types<size>::Elf_Addr addend)
597 { This_reloc::rela16(view, object, psymval, addend); }
598
599 // R_POWERPC_ADDR16_HI: ((Symbol + Addend) >> 16) & 0xffff
600 static inline void
601 addr16_hi(unsigned char* view,
602 typename elfcpp::Elf_types<size>::Elf_Addr value,
603 typename elfcpp::Elf_types<size>::Elf_Addr addend)
604 {
605 This::template rela<16>(view, 16, 0xffff, value, addend);
606 }
607
608 static inline void
609 addr16_hi(unsigned char* view,
610 const Sized_relobj<size, big_endian>* object,
611 const Symbol_value<size>* psymval,
612 typename elfcpp::Elf_types<size>::Elf_Addr addend)
613 {
614 This::template rela<16>(view, 16, 0xffff, object, psymval, addend);
615 }
616
617 // R_POWERPC_ADDR16_HA: Same as R_POWERPC_ADDR16_HI except that if the
618 // final value of the low 16 bits of the
619 // relocation is negative, add one.
620 static inline void
621 addr16_ha(unsigned char* view,
622 typename elfcpp::Elf_types<size>::Elf_Addr value,
623 typename elfcpp::Elf_types<size>::Elf_Addr addend)
624 {
42cacb20
DE		 625 typename elfcpp::Elf_types<size>::Elf_Addr reloc;
626
627 reloc = value + addend;
628
629 if (reloc & 0x8000)
630 reloc += 0x10000;
631 reloc >>= 16;
632
e6fde208 633 elfcpp::Swap<16, big_endian>::writeval(view, reloc);
42cacb20
DE		 634 }
635
636 static inline void
637 addr16_ha(unsigned char* view,
638 const Sized_relobj<size, big_endian>* object,
639 const Symbol_value<size>* psymval,
640 typename elfcpp::Elf_types<size>::Elf_Addr addend)
641 {
42cacb20
DE		 642 typename elfcpp::Elf_types<size>::Elf_Addr reloc;
643
644 reloc = psymval->value(object, addend);
645
646 if (reloc & 0x8000)
647 reloc += 0x10000;
648 reloc >>= 16;
649
e6fde208 650 elfcpp::Swap<16, big_endian>::writeval(view, reloc);
42cacb20
DE		 651 }
652
653 // R_PPC_REL16: (Symbol + Addend - Address) & 0xffff
654 static inline void
655 rel16(unsigned char* view,
656 const Sized_relobj<size, big_endian>* object,
657 const Symbol_value<size>* psymval,
658 typename elfcpp::Elf_types<size>::Elf_Addr addend,
659 typename elfcpp::Elf_types<size>::Elf_Addr address)
660 { This_reloc::pcrela16(view, object, psymval, addend, address); }
661
662 // R_PPC_REL16_LO: (Symbol + Addend - Address) & 0xffff
663 static inline void
664 rel16_lo(unsigned char* view,
665 const Sized_relobj<size, big_endian>* object,
666 const Symbol_value<size>* psymval,
667 typename elfcpp::Elf_types<size>::Elf_Addr addend,
668 typename elfcpp::Elf_types<size>::Elf_Addr address)
669 { This_reloc::pcrela16(view, object, psymval, addend, address); }
670
671 // R_PPC_REL16_HI: ((Symbol + Addend - Address) >> 16) & 0xffff
672 static inline void
673 rel16_hi(unsigned char* view,
674 const Sized_relobj<size, big_endian>* object,
675 const Symbol_value<size>* psymval,
676 typename elfcpp::Elf_types<size>::Elf_Addr addend,
677 typename elfcpp::Elf_types<size>::Elf_Addr address)
678 {
679 This::template pcrela<16>(view, 16, 0xffff, object,
680 psymval, addend, address);
681 }
682
683 // R_PPC_REL16_HA: Same as R_PPC_REL16_HI except that if the
684 // final value of the low 16 bits of the
685 // relocation is negative, add one.
686 static inline void
687 rel16_ha(unsigned char* view,
688 const Sized_relobj<size, big_endian>* object,
689 const Symbol_value<size>* psymval,
690 typename elfcpp::Elf_types<size>::Elf_Addr addend,
691 typename elfcpp::Elf_types<size>::Elf_Addr address)
692 {
42cacb20
DE		 693 typename elfcpp::Elf_types<size>::Elf_Addr reloc;
694
695 reloc = (psymval->value(object, addend) - address);
696 if (reloc & 0x8000)
697 reloc += 0x10000;
698 reloc >>= 16;
699
83d22aa8 700 elfcpp::Swap<16, big_endian>::writeval(view, reloc);
42cacb20
DE		 701 }
702};
703
704// Get the GOT section, creating it if necessary.
705
706template<int size, bool big_endian>
707Output_data_got<size, big_endian>*
708Target_powerpc<size, big_endian>::got_section(Symbol_table* symtab,
709 Layout* layout)
710{
711 if (this->got_ == NULL)
712 {
713 gold_assert(symtab != NULL && layout != NULL);
714
715 this->got_ = new Output_data_got<size, big_endian>();
716
717 layout->add_output_section_data(".got", elfcpp::SHT_PROGBITS,
718 elfcpp::SHF_ALLOC | elfcpp::SHF_WRITE,
1a2dff53 719 this->got_, false, false, false, false);
42cacb20
DE		 720
721 // Create the GOT2 or TOC in the .got section.
722 if (size == 32)
723 {
724 this->got2_ = new Output_data_space(4, "** GOT2");
725 layout->add_output_section_data(".got2", elfcpp::SHT_PROGBITS,
726 elfcpp::SHF_ALLOC
727 | elfcpp::SHF_WRITE,
1a2dff53
ILT		 728 this->got2_, false, false, false,
729 false);
42cacb20
DE		 730 }
731 else
732 {
733 this->toc_ = new Output_data_space(8, "** TOC");
734 layout->add_output_section_data(".toc", elfcpp::SHT_PROGBITS,
735 elfcpp::SHF_ALLOC
736 | elfcpp::SHF_WRITE,
1a2dff53
ILT		 737 this->toc_, false, false, false,
738 false);
42cacb20
DE		 739 }
740
741 // Define _GLOBAL_OFFSET_TABLE_ at the start of the .got section.
742 symtab->define_in_output_data("_GLOBAL_OFFSET_TABLE_", NULL,
99fff23b 743 Symbol_table::PREDEFINED,
42cacb20
DE		 744 this->got_,
745 0, 0, elfcpp::STT_OBJECT,
746 elfcpp::STB_LOCAL,
747 elfcpp::STV_HIDDEN, 0,
748 false, false);
749 }
750
751 return this->got_;
752}
753
754// Get the dynamic reloc section, creating it if necessary.
755
756template<int size, bool big_endian>
757typename Target_powerpc<size, big_endian>::Reloc_section*
758Target_powerpc<size, big_endian>::rela_dyn_section(Layout* layout)
759{
760 if (this->rela_dyn_ == NULL)
761 {
762 gold_assert(layout != NULL);
763 this->rela_dyn_ = new Reloc_section(parameters->options().combreloc());
764 layout->add_output_section_data(".rela.dyn", elfcpp::SHT_RELA,
1a2dff53
ILT		 765 elfcpp::SHF_ALLOC, this->rela_dyn_, true,
766 false, false, false);
42cacb20
DE		 767 }
768 return this->rela_dyn_;
769}
770
771// A class to handle the PLT data.
772
773template<int size, bool big_endian>
774class Output_data_plt_powerpc : public Output_section_data
775{
776 public:
777 typedef Output_data_reloc<elfcpp::SHT_RELA, true,
778 size, big_endian> Reloc_section;
779
780 Output_data_plt_powerpc(Layout*);
781
782 // Add an entry to the PLT.
783 void add_entry(Symbol* gsym);
784
785 // Return the .rela.plt section data.
786 const Reloc_section* rel_plt() const
787 {
788 return this->rel_;
789 }
790
791 protected:
792 void do_adjust_output_section(Output_section* os);
793
794 private:
795 // The size of an entry in the PLT.
796 static const int base_plt_entry_size = (size == 32 ? 16 : 24);
797
798 // Set the final size.
799 void
800 set_final_data_size()
801 {
802 unsigned int full_count = this->count_ + 4;
803
804 this->set_data_size(full_count * base_plt_entry_size);
805 }
806
807 // Write out the PLT data.
808 void
809 do_write(Output_file*);
810
811 // The reloc section.
812 Reloc_section* rel_;
813 // The number of PLT entries.
814 unsigned int count_;
815};
816
817// Create the PLT section. The ordinary .got section is an argument,
818// since we need to refer to the start.
819
820template<int size, bool big_endian>
821Output_data_plt_powerpc<size, big_endian>::Output_data_plt_powerpc(Layout* layout)
822 : Output_section_data(size == 32 ? 4 : 8), count_(0)
823{
824 this->rel_ = new Reloc_section(false);
825 layout->add_output_section_data(".rela.plt", elfcpp::SHT_RELA,
1a2dff53
ILT		 826 elfcpp::SHF_ALLOC, this->rel_, true, false,
827 false, false);
42cacb20
DE		 828}
829
830template<int size, bool big_endian>
831void
832Output_data_plt_powerpc<size, big_endian>::do_adjust_output_section(Output_section* os)
833{
834 os->set_entsize(0);
835}
836
837// Add an entry to the PLT.
838
839template<int size, bool big_endian>
840void
841Output_data_plt_powerpc<size, big_endian>::add_entry(Symbol* gsym)
842{
843 gold_assert(!gsym->has_plt_offset());
844 unsigned int index = this->count_+ + 4;
845 section_offset_type plt_offset;
846
847 if (index < 8192)
848 plt_offset = index * base_plt_entry_size;
849 else
850 gold_unreachable();
851
852 gsym->set_plt_offset(plt_offset);
853
854 ++this->count_;
855
856 gsym->set_needs_dynsym_entry();
857 this->rel_->add_global(gsym, elfcpp::R_POWERPC_JMP_SLOT, this,
858 plt_offset, 0);
859}
860
861static const unsigned int addis_11_11 = 0x3d6b0000;
862static const unsigned int addis_11_30 = 0x3d7e0000;
863static const unsigned int addis_12_12 = 0x3d8c0000;
864static const unsigned int addi_11_11 = 0x396b0000;
865static const unsigned int add_0_11_11 = 0x7c0b5a14;
866static const unsigned int add_11_0_11 = 0x7d605a14;
867static const unsigned int b = 0x48000000;
868static const unsigned int bcl_20_31 = 0x429f0005;
869static const unsigned int bctr = 0x4e800420;
870static const unsigned int lis_11 = 0x3d600000;
871static const unsigned int lis_12 = 0x3d800000;
872static const unsigned int lwzu_0_12 = 0x840c0000;
873static const unsigned int lwz_0_12 = 0x800c0000;
874static const unsigned int lwz_11_11 = 0x816b0000;
875static const unsigned int lwz_11_30 = 0x817e0000;
876static const unsigned int lwz_12_12 = 0x818c0000;
877static const unsigned int mflr_0 = 0x7c0802a6;
878static const unsigned int mflr_12 = 0x7d8802a6;
879static const unsigned int mtctr_0 = 0x7c0903a6;
880static const unsigned int mtctr_11 = 0x7d6903a6;
881static const unsigned int mtlr_0 = 0x7c0803a6;
882static const unsigned int nop = 0x60000000;
883static const unsigned int sub_11_11_12 = 0x7d6c5850;
884
885static const unsigned int addis_r12_r2 = 0x3d820000; /* addis %r12,%r2,xxx@ha */
886static const unsigned int std_r2_40r1 = 0xf8410028; /* std %r2,40(%r1) */
887static const unsigned int ld_r11_0r12 = 0xe96c0000; /* ld %r11,xxx+0@l(%r12) */
888static const unsigned int ld_r2_0r12 = 0xe84c0000; /* ld %r2,xxx+8@l(%r12) */
889 /* ld %r11,xxx+16@l(%r12) */
890
891
892// Write out the PLT.
893
894template<int size, bool big_endian>
895void
896Output_data_plt_powerpc<size, big_endian>::do_write(Output_file* of)
897{
2ea97941 898 const off_t offset = this->offset();
42cacb20
DE		 899 const section_size_type oview_size =
900 convert_to_section_size_type(this->data_size());
2ea97941 901 unsigned char* const oview = of->get_output_view(offset, oview_size);
42cacb20
DE		 902 unsigned char* pov = oview;
903
904 memset(pov, 0, base_plt_entry_size * 4);
905 pov += base_plt_entry_size * 4;
906
907 unsigned int plt_offset = base_plt_entry_size * 4;
908 const unsigned int count = this->count_;
909
910 if (size == 64)
911 {
912 for (unsigned int i = 0; i < count; i++)
913 {
914 }
915 }
916 else
917 {
918 for (unsigned int i = 0; i < count; i++)
919 {
920 elfcpp::Swap<32, true>::writeval(pov + 0x00,
921 lwz_11_30 + plt_offset);
922 elfcpp::Swap<32, true>::writeval(pov + 0x04, mtctr_11);
923 elfcpp::Swap<32, true>::writeval(pov + 0x08, bctr);
ce3ac18a 924 elfcpp::Swap<32, true>::writeval(pov + 0x0c, nop);
42cacb20
DE		 925 pov += base_plt_entry_size;
926 plt_offset += base_plt_entry_size;
927 }
928 }
929
930 gold_assert(static_cast<section_size_type>(pov - oview) == oview_size);
931
2ea97941 932 of->write_output_view(offset, oview_size, oview);
42cacb20
DE		 933}
934
935// Create a PLT entry for a global symbol.
936
937template<int size, bool big_endian>
938void
939Target_powerpc<size, big_endian>::make_plt_entry(Symbol_table* symtab,
940 Layout* layout,
941 Symbol* gsym)
942{
943 if (gsym->has_plt_offset())
944 return;
945
946 if (this->plt_ == NULL)
947 {
948 // Create the GOT section first.
949 this->got_section(symtab, layout);
950
612a8d3d
DM		 951 // Ensure that .rela.dyn always appears before .rela.plt This is
952 // necessary due to how, on PowerPC and some other targets, .rela.dyn
953 // needs to include .rela.plt in it's range.
954 this->rela_dyn_section(layout);
955
42cacb20
DE		 956 this->plt_ = new Output_data_plt_powerpc<size, big_endian>(layout);
957 layout->add_output_section_data(".plt", elfcpp::SHT_PROGBITS,
958 (elfcpp::SHF_ALLOC
959 | elfcpp::SHF_EXECINSTR
960 | elfcpp::SHF_WRITE),
1a2dff53 961 this->plt_, false, false, false, false);
42cacb20
DE		 962
963 // Define _PROCEDURE_LINKAGE_TABLE_ at the start of the .plt section.
964 symtab->define_in_output_data("_PROCEDURE_LINKAGE_TABLE_", NULL,
99fff23b 965 Symbol_table::PREDEFINED,
42cacb20
DE		 966 this->plt_,
967 0, 0, elfcpp::STT_OBJECT,
968 elfcpp::STB_LOCAL,
969 elfcpp::STV_HIDDEN, 0,
970 false, false);
971 }
972
973 this->plt_->add_entry(gsym);
974}
975
976// Create a GOT entry for the TLS module index.
977
978template<int size, bool big_endian>
979unsigned int
980Target_powerpc<size, big_endian>::got_mod_index_entry(Symbol_table* symtab,
981 Layout* layout,
982 Sized_relobj<size, big_endian>* object)
983{
984 if (this->got_mod_index_offset_ == -1U)
985 {
986 gold_assert(symtab != NULL && layout != NULL && object != NULL);
987 Reloc_section* rela_dyn = this->rela_dyn_section(layout);
988 Output_data_got<size, big_endian>* got;
989 unsigned int got_offset;
990
991 got = this->got_section(symtab, layout);
992 got_offset = got->add_constant(0);
993 rela_dyn->add_local(object, 0, elfcpp::R_POWERPC_DTPMOD, got,
994 got_offset, 0);
995 got->add_constant(0);
996 this->got_mod_index_offset_ = got_offset;
997 }
998 return this->got_mod_index_offset_;
999}
1000
1001// Optimize the TLS relocation type based on what we know about the
1002// symbol. IS_FINAL is true if the final address of this symbol is
1003// known at link time.
1004
1005static tls::Tls_optimization
1006optimize_tls_reloc(bool /* is_final */, int r_type)
1007{
1008 // If we are generating a shared library, then we can't do anything
1009 // in the linker.
1010 if (parameters->options().shared())
1011 return tls::TLSOPT_NONE;
1012 switch (r_type)
1013 {
1014 // XXX
1015 default:
1016 gold_unreachable();
1017 }
1018}
1019
1020// Report an unsupported relocation against a local symbol.
1021
1022template<int size, bool big_endian>
1023void
1024Target_powerpc<size, big_endian>::Scan::unsupported_reloc_local(
1025 Sized_relobj<size, big_endian>* object,
1026 unsigned int r_type)
1027{
1028 gold_error(_("%s: unsupported reloc %u against local symbol"),
1029 object->name().c_str(), r_type);
1030}
1031
1032// We are about to emit a dynamic relocation of type R_TYPE. If the
1033// dynamic linker does not support it, issue an error.
1034
1035template<int size, bool big_endian>
1036void
1037Target_powerpc<size, big_endian>::Scan::check_non_pic(Relobj* object,
1038 unsigned int r_type)
1039{
1040 gold_assert(r_type != elfcpp::R_POWERPC_NONE);
1041
1042 // These are the relocation types supported by glibc for both 32-bit
1043 // and 64-bit powerpc.
1044 switch (r_type)
1045 {
1046 case elfcpp::R_POWERPC_RELATIVE:
1047 case elfcpp::R_POWERPC_GLOB_DAT:
1048 case elfcpp::R_POWERPC_DTPMOD:
1049 case elfcpp::R_POWERPC_DTPREL:
1050 case elfcpp::R_POWERPC_TPREL:
1051 case elfcpp::R_POWERPC_JMP_SLOT:
1052 case elfcpp::R_POWERPC_COPY:
1053 case elfcpp::R_POWERPC_ADDR32:
1054 case elfcpp::R_POWERPC_ADDR24:
1055 case elfcpp::R_POWERPC_REL24:
1056 return;
1057
1058 default:
1059 break;
1060 }
1061
1062 if (size == 64)
1063 {
1064 switch (r_type)
1065 {
1066 // These are the relocation types supported only on 64-bit.
1067 case elfcpp::R_PPC64_ADDR64:
1068 case elfcpp::R_PPC64_TPREL16_LO_DS:
1069 case elfcpp::R_PPC64_TPREL16_DS:
1070 case elfcpp::R_POWERPC_TPREL16:
1071 case elfcpp::R_POWERPC_TPREL16_LO:
1072 case elfcpp::R_POWERPC_TPREL16_HI:
1073 case elfcpp::R_POWERPC_TPREL16_HA:
1074 case elfcpp::R_PPC64_TPREL16_HIGHER:
1075 case elfcpp::R_PPC64_TPREL16_HIGHEST:
1076 case elfcpp::R_PPC64_TPREL16_HIGHERA:
1077 case elfcpp::R_PPC64_TPREL16_HIGHESTA:
1078 case elfcpp::R_PPC64_ADDR16_LO_DS:
1079 case elfcpp::R_POWERPC_ADDR16_LO:
1080 case elfcpp::R_POWERPC_ADDR16_HI:
1081 case elfcpp::R_POWERPC_ADDR16_HA:
1082 case elfcpp::R_POWERPC_ADDR30:
1083 case elfcpp::R_PPC64_UADDR64:
1084 case elfcpp::R_POWERPC_UADDR32:
1085 case elfcpp::R_POWERPC_ADDR16:
1086 case elfcpp::R_POWERPC_UADDR16:
1087 case elfcpp::R_PPC64_ADDR16_DS:
1088 case elfcpp::R_PPC64_ADDR16_HIGHER:
1089 case elfcpp::R_PPC64_ADDR16_HIGHEST:
1090 case elfcpp::R_PPC64_ADDR16_HIGHERA:
1091 case elfcpp::R_PPC64_ADDR16_HIGHESTA:
1092 case elfcpp::R_POWERPC_ADDR14_BRTAKEN:
1093 case elfcpp::R_POWERPC_ADDR14_BRNTAKEN:
1094 case elfcpp::R_POWERPC_REL32:
1095 case elfcpp::R_PPC64_REL64:
1096 return;
1097
1098 default:
1099 break;
1100 }
1101 }
1102 else
1103 {
1104 switch (r_type)
1105 {
1106 // These are the relocation types supported only on 32-bit.
1107
1108 default:
1109 break;
1110 }
1111 }
1112
1113 // This prevents us from issuing more than one error per reloc
1114 // section. But we can still wind up issuing more than one
1115 // error per object file.
1116 if (this->issued_non_pic_error_)
1117 return;
33aea2fd 1118 gold_assert(parameters->options().output_is_position_independent());
42cacb20
DE		 1119 object->error(_("requires unsupported dynamic reloc; "
1120 "recompile with -fPIC"));
1121 this->issued_non_pic_error_ = true;
1122 return;
1123}
1124
1125// Scan a relocation for a local symbol.
1126
1127template<int size, bool big_endian>
1128inline void
1129Target_powerpc<size, big_endian>::Scan::local(
42cacb20
DE		 1130 Symbol_table* symtab,
1131 Layout* layout,
1132 Target_powerpc<size, big_endian>* target,
1133 Sized_relobj<size, big_endian>* object,
1134 unsigned int data_shndx,
1135 Output_section* output_section,
1136 const elfcpp::Rela<size, big_endian>& reloc,
1137 unsigned int r_type,
1138 const elfcpp::Sym<size, big_endian>& lsym)
1139{
1140 switch (r_type)
1141 {
1142 case elfcpp::R_POWERPC_NONE:
1143 case elfcpp::R_POWERPC_GNU_VTINHERIT:
1144 case elfcpp::R_POWERPC_GNU_VTENTRY:
1145 break;
1146
1147 case elfcpp::R_PPC64_ADDR64:
1148 case elfcpp::R_POWERPC_ADDR32:
1149 case elfcpp::R_POWERPC_ADDR16_HA:
1150 case elfcpp::R_POWERPC_ADDR16_LO:
1151 // If building a shared library (or a position-independent
1152 // executable), we need to create a dynamic relocation for
1153 // this location.
1154 if (parameters->options().output_is_position_independent())
1155 {
1156 Reloc_section* rela_dyn = target->rela_dyn_section(layout);
1157
1158 check_non_pic(object, r_type);
1159 if (lsym.get_st_type() != elfcpp::STT_SECTION)
1160 {
1161 unsigned int r_sym = elfcpp::elf_r_sym<size>(reloc.get_r_info());
1162 rela_dyn->add_local(object, r_sym, r_type, output_section,
1163 data_shndx, reloc.get_r_offset(),
1164 reloc.get_r_addend());
1165 }
1166 else
1167 {
1168 unsigned int r_sym = elfcpp::elf_r_sym<size>(reloc.get_r_info());
1169 gold_assert(lsym.get_st_value() == 0);
1170 rela_dyn->add_local_relative(object, r_sym, r_type,
1171 output_section, data_shndx,
1172 reloc.get_r_offset(),
1173 reloc.get_r_addend());
1174 }
1175 }
1176 break;
1177
1178 case elfcpp::R_POWERPC_REL24:
1179 case elfcpp::R_PPC_LOCAL24PC:
1180 case elfcpp::R_POWERPC_REL32:
1181 case elfcpp::R_PPC_REL16_LO:
1182 case elfcpp::R_PPC_REL16_HA:
1183 break;
1184
1185 case elfcpp::R_POWERPC_GOT16:
1186 case elfcpp::R_POWERPC_GOT16_LO:
1187 case elfcpp::R_POWERPC_GOT16_HI:
1188 case elfcpp::R_POWERPC_GOT16_HA:
1189 case elfcpp::R_PPC64_TOC16:
1190 case elfcpp::R_PPC64_TOC16_LO:
1191 case elfcpp::R_PPC64_TOC16_HI:
1192 case elfcpp::R_PPC64_TOC16_HA:
1193 case elfcpp::R_PPC64_TOC16_DS:
1194 case elfcpp::R_PPC64_TOC16_LO_DS:
1195 {
1196 // The symbol requires a GOT entry.
1197 Output_data_got<size, big_endian>* got;
1198 unsigned int r_sym;
1199
1200 got = target->got_section(symtab, layout);
1201 r_sym = elfcpp::elf_r_sym<size>(reloc.get_r_info());
1202
1203 // If we are generating a shared object, we need to add a
1204 // dynamic relocation for this symbol's GOT entry.
1205 if (parameters->options().output_is_position_independent())
1206 {
1207 if (!object->local_has_got_offset(r_sym, GOT_TYPE_STANDARD))
1208 {
1209 Reloc_section* rela_dyn = target->rela_dyn_section(layout);
1210 unsigned int off;
1211
1212 off = got->add_constant(0);
1213 object->set_local_got_offset(r_sym, GOT_TYPE_STANDARD, off);
1214 rela_dyn->add_local_relative(object, r_sym,
1215 elfcpp::R_POWERPC_RELATIVE,
1216 got, off, 0);
1217 }
1218 }
1219 else
1220 got->add_local(object, r_sym, GOT_TYPE_STANDARD);
1221 }
1222 break;
1223
1224 case elfcpp::R_PPC64_TOC:
1225 // We need a GOT section.
1226 target->got_section(symtab, layout);
1227 break;
1228
1229 // These are relocations which should only be seen by the
1230 // dynamic linker, and should never be seen here.
1231 case elfcpp::R_POWERPC_COPY:
1232 case elfcpp::R_POWERPC_GLOB_DAT:
1233 case elfcpp::R_POWERPC_JMP_SLOT:
1234 case elfcpp::R_POWERPC_RELATIVE:
1235 case elfcpp::R_POWERPC_DTPMOD:
1236 gold_error(_("%s: unexpected reloc %u in object file"),
1237 object->name().c_str(), r_type);
1238 break;
1239
1240 default:
1241 unsupported_reloc_local(object, r_type);
1242 break;
1243 }
1244}
1245
1246// Report an unsupported relocation against a global symbol.
1247
1248template<int size, bool big_endian>
1249void
1250Target_powerpc<size, big_endian>::Scan::unsupported_reloc_global(
1251 Sized_relobj<size, big_endian>* object,
1252 unsigned int r_type,
1253 Symbol* gsym)
1254{
1255 gold_error(_("%s: unsupported reloc %u against global symbol %s"),
1256 object->name().c_str(), r_type, gsym->demangled_name().c_str());
1257}
1258
1259// Scan a relocation for a global symbol.
1260
1261template<int size, bool big_endian>
1262inline void
1263Target_powerpc<size, big_endian>::Scan::global(
42cacb20
DE		 1264 Symbol_table* symtab,
1265 Layout* layout,
1266 Target_powerpc<size, big_endian>* target,
1267 Sized_relobj<size, big_endian>* object,
1268 unsigned int data_shndx,
1269 Output_section* output_section,
1270 const elfcpp::Rela<size, big_endian>& reloc,
1271 unsigned int r_type,
1272 Symbol* gsym)
1273{
1274 switch (r_type)
1275 {
1276 case elfcpp::R_POWERPC_NONE:
1277 case elfcpp::R_POWERPC_GNU_VTINHERIT:
1278 case elfcpp::R_POWERPC_GNU_VTENTRY:
1279 break;
1280
1281 case elfcpp::R_PPC_PLTREL24:
1282 // If the symbol is fully resolved, this is just a PC32 reloc.
1283 // Otherwise we need a PLT entry.
1284 if (gsym->final_value_is_known())
1285 break;
1286 // If building a shared library, we can also skip the PLT entry
1287 // if the symbol is defined in the output file and is protected
1288 // or hidden.
1289 if (gsym->is_defined()
1290 && !gsym->is_from_dynobj()
1291 && !gsym->is_preemptible())
1292 break;
1293 target->make_plt_entry(symtab, layout, gsym);
1294 break;
1295
1296 case elfcpp::R_POWERPC_ADDR16:
1297 case elfcpp::R_POWERPC_ADDR16_LO:
1298 case elfcpp::R_POWERPC_ADDR16_HI:
1299 case elfcpp::R_POWERPC_ADDR16_HA:
1300 case elfcpp::R_POWERPC_ADDR32:
1301 case elfcpp::R_PPC64_ADDR64:
1302 {
1303 // Make a PLT entry if necessary.
1304 if (gsym->needs_plt_entry())
1305 {
1306 target->make_plt_entry(symtab, layout, gsym);
1307 // Since this is not a PC-relative relocation, we may be
1308 // taking the address of a function. In that case we need to
1309 // set the entry in the dynamic symbol table to the address of
1310 // the PLT entry.
1311 if (gsym->is_from_dynobj() && !parameters->options().shared())
1312 gsym->set_needs_dynsym_value();
1313 }
1314 // Make a dynamic relocation if necessary.
1315 if (gsym->needs_dynamic_reloc(Symbol::ABSOLUTE_REF))
1316 {
966d4097 1317 if (gsym->may_need_copy_reloc())
42cacb20
DE		 1318 {
1319 target->copy_reloc(symtab, layout, object,
1320 data_shndx, output_section, gsym, reloc);
1321 }
1322 else if ((r_type == elfcpp::R_POWERPC_ADDR32
1323 || r_type == elfcpp::R_PPC64_ADDR64)
1324 && gsym->can_use_relative_reloc(false))
1325 {
1326 Reloc_section* rela_dyn = target->rela_dyn_section(layout);
1327 rela_dyn->add_global_relative(gsym, elfcpp::R_POWERPC_RELATIVE,
1328 output_section, object,
1329 data_shndx, reloc.get_r_offset(),
1330 reloc.get_r_addend());
1331 }
1332 else
1333 {
1334 Reloc_section* rela_dyn = target->rela_dyn_section(layout);
1335
1336 check_non_pic(object, r_type);
1337 if (gsym->is_from_dynobj()
1338 || gsym->is_undefined()
1339 || gsym->is_preemptible())
1340 rela_dyn->add_global(gsym, r_type, output_section,
1341 object, data_shndx,
1342 reloc.get_r_offset(),
1343 reloc.get_r_addend());
1344 else
1345 rela_dyn->add_global_relative(gsym, r_type,
1346 output_section, object,
1347 data_shndx,
1348 reloc.get_r_offset(),
1349 reloc.get_r_addend());
1350 }
1351 }
1352 }
1353 break;
1354
1355 case elfcpp::R_POWERPC_REL24:
1356 case elfcpp::R_PPC_LOCAL24PC:
1357 case elfcpp::R_PPC_REL16:
1358 case elfcpp::R_PPC_REL16_LO:
1359 case elfcpp::R_PPC_REL16_HI:
1360 case elfcpp::R_PPC_REL16_HA:
1361 {
1362 if (gsym->needs_plt_entry())
1363 target->make_plt_entry(symtab, layout, gsym);
1364 // Make a dynamic relocation if necessary.
1365 int flags = Symbol::NON_PIC_REF;
1366 if (gsym->type() == elfcpp::STT_FUNC)
1367 flags |= Symbol::FUNCTION_CALL;
1368 if (gsym->needs_dynamic_reloc(flags))
1369 {
966d4097 1370 if (gsym->may_need_copy_reloc())
42cacb20
DE		 1371 {
1372 target->copy_reloc(symtab, layout, object,
1373 data_shndx, output_section, gsym,
1374 reloc);
1375 }
1376 else
1377 {
1378 Reloc_section* rela_dyn = target->rela_dyn_section(layout);
1379 check_non_pic(object, r_type);
1380 rela_dyn->add_global(gsym, r_type, output_section, object,
1381 data_shndx, reloc.get_r_offset(),
1382 reloc.get_r_addend());
1383 }
1384 }
1385 }
1386 break;
1387
1388 case elfcpp::R_POWERPC_GOT16:
1389 case elfcpp::R_POWERPC_GOT16_LO:
1390 case elfcpp::R_POWERPC_GOT16_HI:
1391 case elfcpp::R_POWERPC_GOT16_HA:
1392 case elfcpp::R_PPC64_TOC16:
1393 case elfcpp::R_PPC64_TOC16_LO:
1394 case elfcpp::R_PPC64_TOC16_HI:
1395 case elfcpp::R_PPC64_TOC16_HA:
1396 case elfcpp::R_PPC64_TOC16_DS:
1397 case elfcpp::R_PPC64_TOC16_LO_DS:
1398 {
1399 // The symbol requires a GOT entry.
1400 Output_data_got<size, big_endian>* got;
1401
1402 got = target->got_section(symtab, layout);
1403 if (gsym->final_value_is_known())
1404 got->add_global(gsym, GOT_TYPE_STANDARD);
1405 else
1406 {
1407 // If this symbol is not fully resolved, we need to add a
1408 // dynamic relocation for it.
1409 Reloc_section* rela_dyn = target->rela_dyn_section(layout);
1410 if (gsym->is_from_dynobj()
1411 || gsym->is_undefined()
1412 || gsym->is_preemptible())
1413 got->add_global_with_rela(gsym, GOT_TYPE_STANDARD, rela_dyn,
1414 elfcpp::R_POWERPC_GLOB_DAT);
1415 else if (!gsym->has_got_offset(GOT_TYPE_STANDARD))
1416 {
1417 unsigned int off = got->add_constant(0);
1418
1419 gsym->set_got_offset(GOT_TYPE_STANDARD, off);
1420 rela_dyn->add_global_relative(gsym, elfcpp::R_POWERPC_RELATIVE,
1421 got, off, 0);
1422 }
1423 }
1424 }
1425 break;
1426
1427 case elfcpp::R_PPC64_TOC:
1428 // We need a GOT section.
1429 target->got_section(symtab, layout);
1430 break;
1431
1432 case elfcpp::R_POWERPC_GOT_TPREL16:
1433 case elfcpp::R_POWERPC_TLS:
1434 // XXX TLS
1435 break;
1436
1437 // These are relocations which should only be seen by the
1438 // dynamic linker, and should never be seen here.
1439 case elfcpp::R_POWERPC_COPY:
1440 case elfcpp::R_POWERPC_GLOB_DAT:
1441 case elfcpp::R_POWERPC_JMP_SLOT:
1442 case elfcpp::R_POWERPC_RELATIVE:
1443 case elfcpp::R_POWERPC_DTPMOD:
1444 gold_error(_("%s: unexpected reloc %u in object file"),
1445 object->name().c_str(), r_type);
1446 break;
1447
1448 default:
1449 unsupported_reloc_global(object, r_type, gsym);
1450 break;
1451 }
1452}
1453
6d03d481
ST		 1454// Process relocations for gc.
1455
1456template<int size, bool big_endian>
1457void
1458Target_powerpc<size, big_endian>::gc_process_relocs(
6d03d481
ST		 1459 Symbol_table* symtab,
1460 Layout* layout,
1461 Sized_relobj<size, big_endian>* object,
1462 unsigned int data_shndx,
1463 unsigned int,
1464 const unsigned char* prelocs,
1465 size_t reloc_count,
1466 Output_section* output_section,
1467 bool needs_special_offset_handling,
1468 size_t local_symbol_count,
1469 const unsigned char* plocal_symbols)
1470{
1471 typedef Target_powerpc<size, big_endian> Powerpc;
2ea97941 1472 typedef typename Target_powerpc<size, big_endian>::Scan Scan;
6d03d481 1473
2ea97941 1474 gold::gc_process_relocs<size, big_endian, Powerpc, elfcpp::SHT_RELA, Scan>(
6d03d481
ST		 1475 symtab,
1476 layout,
1477 this,
1478 object,
1479 data_shndx,
1480 prelocs,
1481 reloc_count,
1482 output_section,
1483 needs_special_offset_handling,
1484 local_symbol_count,
1485 plocal_symbols);
1486}
1487
42cacb20
DE		 1488// Scan relocations for a section.
1489
1490template<int size, bool big_endian>
1491void
1492Target_powerpc<size, big_endian>::scan_relocs(
42cacb20
DE		 1493 Symbol_table* symtab,
1494 Layout* layout,
1495 Sized_relobj<size, big_endian>* object,
1496 unsigned int data_shndx,
1497 unsigned int sh_type,
1498 const unsigned char* prelocs,
1499 size_t reloc_count,
1500 Output_section* output_section,
1501 bool needs_special_offset_handling,
1502 size_t local_symbol_count,
1503 const unsigned char* plocal_symbols)
1504{
1505 typedef Target_powerpc<size, big_endian> Powerpc;
2ea97941 1506 typedef typename Target_powerpc<size, big_endian>::Scan Scan;
42cacb20
DE		 1507 static Output_data_space* sdata;
1508
1509 if (sh_type == elfcpp::SHT_REL)
1510 {
1511 gold_error(_("%s: unsupported REL reloc section"),
1512 object->name().c_str());
1513 return;
1514 }
1515
1516 // Define _SDA_BASE_ at the start of the .sdata section.
1517 if (sdata == NULL)
1518 {
1519 // layout->find_output_section(".sdata") == NULL
1520 sdata = new Output_data_space(4, "** sdata");
1521 Output_section* os = layout->add_output_section_data(".sdata", 0,
1522 elfcpp::SHF_ALLOC
1523 | elfcpp::SHF_WRITE,
1a2dff53
ILT		 1524 sdata, false,
1525 false, false, false);
42cacb20 1526 symtab->define_in_output_data("_SDA_BASE_", NULL,
99fff23b 1527 Symbol_table::PREDEFINED,
42cacb20
DE		 1528 os,
1529 32768, 0,
1530 elfcpp::STT_OBJECT,
1531 elfcpp::STB_LOCAL,
1532 elfcpp::STV_HIDDEN, 0,
1533 false, false);
1534 }
1535
2ea97941 1536 gold::scan_relocs<size, big_endian, Powerpc, elfcpp::SHT_RELA, Scan>(
42cacb20
DE		 1537 symtab,
1538 layout,
1539 this,
1540 object,
1541 data_shndx,
1542 prelocs,
1543 reloc_count,
1544 output_section,
1545 needs_special_offset_handling,
1546 local_symbol_count,
1547 plocal_symbols);
1548}
1549
1550// Finalize the sections.
1551
1552template<int size, bool big_endian>
1553void
d5b40221
DK		 1554Target_powerpc<size, big_endian>::do_finalize_sections(
1555 Layout* layout,
f59f41f3
DK		 1556 const Input_objects*,
1557 Symbol_table*)
42cacb20
DE		 1558{
1559 // Fill in some more dynamic tags.
ea715a34
ILT		 1560 const Reloc_section* rel_plt = (this->plt_ == NULL
1561 ? NULL
1562 : this->plt_->rel_plt());
1563 layout->add_target_dynamic_tags(false, this->plt_, rel_plt,
612a8d3d 1564 this->rela_dyn_, true, size == 32);
42cacb20
DE		 1565
1566 // Emit any relocs we saved in an attempt to avoid generating COPY
1567 // relocs.
1568 if (this->copy_relocs_.any_saved_relocs())
1569 this->copy_relocs_.emit(this->rela_dyn_section(layout));
1570}
1571
1572// Perform a relocation.
1573
1574template<int size, bool big_endian>
1575inline bool
1576Target_powerpc<size, big_endian>::Relocate::relocate(
1577 const Relocate_info<size, big_endian>* relinfo,
1578 Target_powerpc* target,
031cdbed 1579 Output_section*,
42cacb20
DE		 1580 size_t relnum,
1581 const elfcpp::Rela<size, big_endian>& rela,
1582 unsigned int r_type,
1583 const Sized_symbol<size>* gsym,
1584 const Symbol_value<size>* psymval,
1585 unsigned char* view,
1586 typename elfcpp::Elf_types<size>::Elf_Addr address,
1587 section_size_type /* view_size */)
1588{
1589 const unsigned int toc_base_offset = 0x8000;
1590 typedef Powerpc_relocate_functions<size, big_endian> Reloc;
1591
1592 // Pick the value to use for symbols defined in shared objects.
1593 Symbol_value<size> symval;
1594 if (gsym != NULL
de4c45bd
ILT		 1595 && gsym->use_plt_offset(r_type == elfcpp::R_POWERPC_REL24
1596 || r_type == elfcpp::R_PPC_LOCAL24PC
1597 || r_type == elfcpp::R_PPC_REL16
1598 || r_type == elfcpp::R_PPC_REL16_LO
1599 || r_type == elfcpp::R_PPC_REL16_HI
1600 || r_type == elfcpp::R_PPC_REL16_HA))
42cacb20
DE		 1601 {
1602 elfcpp::Elf_Xword value;
1603
1604 value = target->plt_section()->address() + gsym->plt_offset();
1605
1606 symval.set_output_value(value);
1607
1608 psymval = &symval;
1609 }
1610
1611 const Sized_relobj<size, big_endian>* object = relinfo->object;
1612 elfcpp::Elf_Xword addend = rela.get_r_addend();
1613
1614 // Get the GOT offset if needed. Unlike i386 and x86_64, our GOT
1615 // pointer points to the beginning, not the end, of the table.
1616 // So we just use the plain offset.
1617 bool have_got_offset = false;
1618 unsigned int got_offset = 0;
1619 unsigned int got2_offset = 0;
1620 switch (r_type)
1621 {
1622 case elfcpp::R_PPC64_TOC16:
1623 case elfcpp::R_PPC64_TOC16_LO:
1624 case elfcpp::R_PPC64_TOC16_HI:
1625 case elfcpp::R_PPC64_TOC16_HA:
1626 case elfcpp::R_PPC64_TOC16_DS:
1627 case elfcpp::R_PPC64_TOC16_LO_DS:
1628 // Subtract the TOC base address.
1629 addend -= target->toc_section()->address() + toc_base_offset;
1630 /* FALLTHRU */
1631
1632 case elfcpp::R_POWERPC_GOT16:
1633 case elfcpp::R_POWERPC_GOT16_LO:
1634 case elfcpp::R_POWERPC_GOT16_HI:
1635 case elfcpp::R_POWERPC_GOT16_HA:
1636 case elfcpp::R_PPC64_GOT16_DS:
1637 case elfcpp::R_PPC64_GOT16_LO_DS:
1638 if (gsym != NULL)
1639 {
1640 gold_assert(gsym->has_got_offset(GOT_TYPE_STANDARD));
1641 got_offset = gsym->got_offset(GOT_TYPE_STANDARD);
1642 }
1643 else
1644 {
1645 unsigned int r_sym = elfcpp::elf_r_sym<size>(rela.get_r_info());
1646 gold_assert(object->local_has_got_offset(r_sym, GOT_TYPE_STANDARD));
1647 got_offset = object->local_got_offset(r_sym, GOT_TYPE_STANDARD);
1648 }
1649 have_got_offset = true;
1650 break;
1651
1652 // R_PPC_PLTREL24 is rather special. If non-zero,
1653 // the addend specifies the GOT pointer offset within .got2.
1654 case elfcpp::R_PPC_PLTREL24:
1655 if (addend >= 32768)
1656 {
1657 Output_data_space* got2;
1658 got2 = target->got2_section();
1659 got2_offset = got2->offset();
1660 addend += got2_offset;
1661 }
1662 have_got_offset = true;
1663 break;
1664
1665 default:
1666 break;
1667 }
1668
1669 switch (r_type)
1670 {
1671 case elfcpp::R_POWERPC_NONE:
1672 case elfcpp::R_POWERPC_GNU_VTINHERIT:
1673 case elfcpp::R_POWERPC_GNU_VTENTRY:
1674 break;
1675
1676 case elfcpp::R_POWERPC_REL32:
1677 Reloc::rel32(view, object, psymval, addend, address);
1678 break;
1679
1680 case elfcpp::R_POWERPC_REL24:
1681 Reloc::rel24(view, object, psymval, addend, address);
1682 break;
1683
1684 case elfcpp::R_POWERPC_REL14:
1685 Reloc::rel14(view, object, psymval, addend, address);
1686 break;
1687
1688 case elfcpp::R_PPC_PLTREL24:
1689 Reloc::rel24(view, object, psymval, addend, address);
1690 break;
1691
1692 case elfcpp::R_PPC_LOCAL24PC:
1693 Reloc::rel24(view, object, psymval, addend, address);
1694 break;
1695
1696 case elfcpp::R_PPC64_ADDR64:
1697 if (!parameters->options().output_is_position_independent())
1698 Relocate_functions<size, big_endian>::rela64(view, object,
1699 psymval, addend);
1700 break;
1701
1702 case elfcpp::R_POWERPC_ADDR32:
1703 if (!parameters->options().output_is_position_independent())
1704 Relocate_functions<size, big_endian>::rela32(view, object,
1705 psymval, addend);
1706 break;
1707
1708 case elfcpp::R_POWERPC_ADDR16_LO:
1709 Reloc::addr16_lo(view, object, psymval, addend);
1710 break;
1711
1712 case elfcpp::R_POWERPC_ADDR16_HI:
1713 Reloc::addr16_hi(view, object, psymval, addend);
1714 break;
1715
1716 case elfcpp::R_POWERPC_ADDR16_HA:
1717 Reloc::addr16_ha(view, object, psymval, addend);
1718 break;
1719
1720 case elfcpp::R_PPC_REL16_LO:
1721 Reloc::rel16_lo(view, object, psymval, addend, address);
1722 break;
1723
1724 case elfcpp::R_PPC_REL16_HI:
1725 Reloc::rel16_lo(view, object, psymval, addend, address);
1726 break;
1727
1728 case elfcpp::R_PPC_REL16_HA:
83d22aa8 1729 Reloc::rel16_ha(view, object, psymval, addend, address);
42cacb20
DE		 1730 break;
1731
1732 case elfcpp::R_POWERPC_GOT16:
1733 Reloc::addr16(view, got_offset, addend);
1734 break;
1735
1736 case elfcpp::R_POWERPC_GOT16_LO:
1737 Reloc::addr16_lo(view, got_offset, addend);
1738 break;
1739
1740 case elfcpp::R_POWERPC_GOT16_HI:
1741 Reloc::addr16_hi(view, got_offset, addend);
1742 break;
1743
1744 case elfcpp::R_POWERPC_GOT16_HA:
1745 Reloc::addr16_ha(view, got_offset, addend);
1746 break;
1747
1748 case elfcpp::R_PPC64_TOC16:
1749 Reloc::addr16(view, got_offset, addend);
1750 break;
1751
1752 case elfcpp::R_PPC64_TOC16_LO:
1753 Reloc::addr16_lo(view, got_offset, addend);
1754 break;
1755
1756 case elfcpp::R_PPC64_TOC16_HI:
1757 Reloc::addr16_hi(view, got_offset, addend);
1758 break;
1759
1760 case elfcpp::R_PPC64_TOC16_HA:
1761 Reloc::addr16_ha(view, got_offset, addend);
1762 break;
1763
1764 case elfcpp::R_PPC64_TOC16_DS:
1765 case elfcpp::R_PPC64_TOC16_LO_DS:
1766 Reloc::addr16_ds(view, got_offset, addend);
1767 break;
1768
1769 case elfcpp::R_PPC64_TOC:
1770 {
1771 elfcpp::Elf_types<64>::Elf_Addr value;
1772 value = target->toc_section()->address() + toc_base_offset;
1773 Relocate_functions<64, false>::rela64(view, value, addend);
1774 }
1775 break;
1776
1777 case elfcpp::R_POWERPC_COPY:
1778 case elfcpp::R_POWERPC_GLOB_DAT:
1779 case elfcpp::R_POWERPC_JMP_SLOT:
1780 case elfcpp::R_POWERPC_RELATIVE:
1781 // This is an outstanding tls reloc, which is unexpected when
1782 // linking.
1783 case elfcpp::R_POWERPC_DTPMOD:
1784 gold_error_at_location(relinfo, relnum, rela.get_r_offset(),
1785 _("unexpected reloc %u in object file"),
1786 r_type);
1787 break;
1788
1789 default:
1790 gold_error_at_location(relinfo, relnum, rela.get_r_offset(),
1791 _("unsupported reloc %u"),
1792 r_type);
1793 break;
1794 }
1795
1796 return true;
1797}
1798
1799// Perform a TLS relocation.
1800
1801template<int size, bool big_endian>
1802inline void
1803Target_powerpc<size, big_endian>::Relocate::relocate_tls(
1804 const Relocate_info<size, big_endian>* relinfo,
1805 Target_powerpc<size, big_endian>* target,
1806 size_t relnum,
1807 const elfcpp::Rela<size, big_endian>& rela,
1808 unsigned int r_type,
1809 const Sized_symbol<size>* gsym,
1810 const Symbol_value<size>* psymval,
1811 unsigned char* view,
1812 typename elfcpp::Elf_types<size>::Elf_Addr address,
1813 section_size_type)
1814{
1815 Output_segment* tls_segment = relinfo->layout->tls_segment();
1816 typedef Powerpc_relocate_functions<size, big_endian> Reloc;
1817 const Sized_relobj<size, big_endian>* object = relinfo->object;
1818
1819 const elfcpp::Elf_Xword addend = rela.get_r_addend();
1820 typename elfcpp::Elf_types<size>::Elf_Addr value = psymval->value(object, 0);
1821
1822 const bool is_final =
1823 (gsym == NULL
1824 ? !parameters->options().output_is_position_independent()
1825 : gsym->final_value_is_known());
1826 const tls::Tls_optimization optimized_type
1827 = optimize_tls_reloc(is_final, r_type);
1828
1829 switch (r_type)
1830 {
1831 // XXX
1832 }
1833}
1834
1835// Relocate section data.
1836
1837template<int size, bool big_endian>
1838void
1839Target_powerpc<size, big_endian>::relocate_section(
1840 const Relocate_info<size, big_endian>* relinfo,
1841 unsigned int sh_type,
1842 const unsigned char* prelocs,
1843 size_t reloc_count,
1844 Output_section* output_section,
1845 bool needs_special_offset_handling,
1846 unsigned char* view,
1847 typename elfcpp::Elf_types<size>::Elf_Addr address,
364c7fa5
ILT		 1848 section_size_type view_size,
1849 const Reloc_symbol_changes* reloc_symbol_changes)
42cacb20
DE		 1850{
1851 typedef Target_powerpc<size, big_endian> Powerpc;
1852 typedef typename Target_powerpc<size, big_endian>::Relocate Powerpc_relocate;
1853
1854 gold_assert(sh_type == elfcpp::SHT_RELA);
1855
1856 gold::relocate_section<size, big_endian, Powerpc, elfcpp::SHT_RELA,
1857 Powerpc_relocate>(
1858 relinfo,
1859 this,
1860 prelocs,
1861 reloc_count,
1862 output_section,
1863 needs_special_offset_handling,
1864 view,
1865 address,
364c7fa5
ILT		 1866 view_size,
1867 reloc_symbol_changes);
42cacb20
DE		 1868}
1869
1870// Return the size of a relocation while scanning during a relocatable
1871// link.
1872
1873template<int size, bool big_endian>
1874unsigned int
1875Target_powerpc<size, big_endian>::Relocatable_size_for_reloc::get_size_for_reloc(
1876 unsigned int,
1877 Relobj*)
1878{
1879 // We are always SHT_RELA, so we should never get here.
1880 gold_unreachable();
1881 return 0;
1882}
1883
1884// Scan the relocs during a relocatable link.
1885
1886template<int size, bool big_endian>
1887void
1888Target_powerpc<size, big_endian>::scan_relocatable_relocs(
42cacb20
DE		 1889 Symbol_table* symtab,
1890 Layout* layout,
1891 Sized_relobj<size, big_endian>* object,
1892 unsigned int data_shndx,
1893 unsigned int sh_type,
1894 const unsigned char* prelocs,
1895 size_t reloc_count,
1896 Output_section* output_section,
1897 bool needs_special_offset_handling,
1898 size_t local_symbol_count,
1899 const unsigned char* plocal_symbols,
1900 Relocatable_relocs* rr)
1901{
1902 gold_assert(sh_type == elfcpp::SHT_RELA);
1903
1904 typedef gold::Default_scan_relocatable_relocs<elfcpp::SHT_RELA,
1905 Relocatable_size_for_reloc> Scan_relocatable_relocs;
1906
1907 gold::scan_relocatable_relocs<size, big_endian, elfcpp::SHT_RELA,
1908 Scan_relocatable_relocs>(
42cacb20
DE		 1909 symtab,
1910 layout,
1911 object,
1912 data_shndx,
1913 prelocs,
1914 reloc_count,
1915 output_section,
1916 needs_special_offset_handling,
1917 local_symbol_count,
1918 plocal_symbols,
1919 rr);
1920}
1921
1922// Relocate a section during a relocatable link.
1923
1924template<int size, bool big_endian>
1925void
1926Target_powerpc<size, big_endian>::relocate_for_relocatable(
1927 const Relocate_info<size, big_endian>* relinfo,
1928 unsigned int sh_type,
1929 const unsigned char* prelocs,
1930 size_t reloc_count,
1931 Output_section* output_section,
1932 off_t offset_in_output_section,
1933 const Relocatable_relocs* rr,
1934 unsigned char* view,
1935 typename elfcpp::Elf_types<size>::Elf_Addr view_address,
1936 section_size_type view_size,
1937 unsigned char* reloc_view,
1938 section_size_type reloc_view_size)
1939{
1940 gold_assert(sh_type == elfcpp::SHT_RELA);
1941
1942 gold::relocate_for_relocatable<size, big_endian, elfcpp::SHT_RELA>(
1943 relinfo,
1944 prelocs,
1945 reloc_count,
1946 output_section,
1947 offset_in_output_section,
1948 rr,
1949 view,
1950 view_address,
1951 view_size,
1952 reloc_view,
1953 reloc_view_size);
1954}
1955
1956// Return the value to use for a dynamic which requires special
1957// treatment. This is how we support equality comparisons of function
1958// pointers across shared library boundaries, as described in the
1959// processor specific ABI supplement.
1960
1961template<int size, bool big_endian>
1962uint64_t
1963Target_powerpc<size, big_endian>::do_dynsym_value(const Symbol* gsym) const
1964{
1965 gold_assert(gsym->is_from_dynobj() && gsym->has_plt_offset());
1966 return this->plt_section()->address() + gsym->plt_offset();
1967}
1968
1969// The selector for powerpc object files.
1970
1971template<int size, bool big_endian>
1972class Target_selector_powerpc : public Target_selector
1973{
1974public:
1975 Target_selector_powerpc()
1976 : Target_selector(elfcpp::EM_NONE, size, big_endian,
1977 (size == 64 ?
1978 (big_endian ? "elf64-powerpc" : "elf64-powerpcle") :
1979 (big_endian ? "elf32-powerpc" : "elf32-powerpcle")))
1980 { }
1981
2ea97941 1982 Target* do_recognize(int machine, int, int)
42cacb20
DE		 1983 {
1984 switch (size)
1985 {
1986 case 64:
2ea97941 1987 if (machine != elfcpp::EM_PPC64)
42cacb20
DE		 1988 return NULL;
1989 break;
1990
1991 case 32:
2ea97941 1992 if (machine != elfcpp::EM_PPC)
42cacb20
DE		 1993 return NULL;
1994 break;
1995
1996 default:
1997 return NULL;
1998 }
1999
7f055c20 2000 return this->instantiate_target();
42cacb20
DE		 2001 }
2002
2003 Target* do_instantiate_target()
7f055c20 2004 { return new Target_powerpc<size, big_endian>(); }
42cacb20
DE		 2005};
2006
2007Target_selector_powerpc<32, true> target_selector_ppc32;
2008Target_selector_powerpc<32, false> target_selector_ppc32le;
2009Target_selector_powerpc<64, true> target_selector_ppc64;
2010Target_selector_powerpc<64, false> target_selector_ppc64le;
2011
2012} // End anonymous namespace.
GDB Binutils - Deliverables
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