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[deliverable/binutils-gdb.git] / gold / powerpc.cc
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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
21bb3914
ST		 186 inline bool
187 local_reloc_may_be_function_pointer(Symbol_table* , Layout* ,
188 Target_powerpc* ,
189 Sized_relobj<size, big_endian>* ,
190 unsigned int ,
191 Output_section* ,
192 const elfcpp::Rela<size, big_endian>& ,
193 unsigned int ,
194 const elfcpp::Sym<size, big_endian>&)
195 { return false; }
196
197 inline bool
198 global_reloc_may_be_function_pointer(Symbol_table* , Layout* ,
199 Target_powerpc* ,
200 Sized_relobj<size, big_endian>* ,
201 unsigned int ,
202 Output_section* ,
203 const elfcpp::Rela<size,
204 big_endian>& ,
205 unsigned int , Symbol*)
206 { return false; }
207
42cacb20
DE		 208 private:
209 static void
210 unsupported_reloc_local(Sized_relobj<size, big_endian>*,
211 unsigned int r_type);
212
213 static void
214 unsupported_reloc_global(Sized_relobj<size, big_endian>*,
215 unsigned int r_type, Symbol*);
216
217 static void
218 generate_tls_call(Symbol_table* symtab, Layout* layout,
219 Target_powerpc* target);
220
221 void
222 check_non_pic(Relobj*, unsigned int r_type);
223
224 // Whether we have issued an error about a non-PIC compilation.
225 bool issued_non_pic_error_;
226 };
227
228 // The class which implements relocation.
229 class Relocate
230 {
231 public:
232 // Do a relocation. Return false if the caller should not issue
233 // any warnings about this relocation.
234 inline bool
235 relocate(const Relocate_info<size, big_endian>*, Target_powerpc*,
031cdbed
ILT		 236 Output_section*, size_t relnum,
237 const elfcpp::Rela<size, big_endian>&,
42cacb20
DE		 238 unsigned int r_type, const Sized_symbol<size>*,
239 const Symbol_value<size>*,
240 unsigned char*,
241 typename elfcpp::Elf_types<size>::Elf_Addr,
242 section_size_type);
243
244 private:
245 // Do a TLS relocation.
246 inline void
247 relocate_tls(const Relocate_info<size, big_endian>*,
248 Target_powerpc* target,
249 size_t relnum, const elfcpp::Rela<size, big_endian>&,
250 unsigned int r_type, const Sized_symbol<size>*,
251 const Symbol_value<size>*,
252 unsigned char*,
253 typename elfcpp::Elf_types<size>::Elf_Addr,
254 section_size_type);
255 };
256
257 // A class which returns the size required for a relocation type,
258 // used while scanning relocs during a relocatable link.
259 class Relocatable_size_for_reloc
260 {
261 public:
262 unsigned int
263 get_size_for_reloc(unsigned int, Relobj*);
264 };
265
266 // Get the GOT section, creating it if necessary.
267 Output_data_got<size, big_endian>*
268 got_section(Symbol_table*, Layout*);
269
270 Output_data_space*
271 got2_section() const
272 {
273 gold_assert (this->got2_ != NULL);
274 return this->got2_;
275 }
276
277 // Get the TOC section.
278 Output_data_space*
279 toc_section() const
280 {
281 gold_assert (this->toc_ != NULL);
282 return this->toc_;
283 }
284
285 // Create a PLT entry for a global symbol.
286 void
287 make_plt_entry(Symbol_table*, Layout*, Symbol*);
288
289 // Create a GOT entry for the TLS module index.
290 unsigned int
291 got_mod_index_entry(Symbol_table* symtab, Layout* layout,
292 Sized_relobj<size, big_endian>* object);
293
294 // Get the PLT section.
295 const Output_data_plt_powerpc<size, big_endian>*
296 plt_section() const
297 {
298 gold_assert(this->plt_ != NULL);
299 return this->plt_;
300 }
301
302 // Get the dynamic reloc section, creating it if necessary.
303 Reloc_section*
304 rela_dyn_section(Layout*);
305
42cacb20
DE		 306 // Copy a relocation against a global symbol.
307 void
ef9beddf
ILT		 308 copy_reloc(Symbol_table* symtab, Layout* layout,
309 Sized_relobj<size, big_endian>* object,
42cacb20
DE		 310 unsigned int shndx, Output_section* output_section,
311 Symbol* sym, const elfcpp::Rela<size, big_endian>& reloc)
312 {
313 this->copy_relocs_.copy_reloc(symtab, layout,
314 symtab->get_sized_symbol<size>(sym),
315 object, shndx, output_section,
316 reloc, this->rela_dyn_section(layout));
317 }
318
319 // Information about this specific target which we pass to the
320 // general Target structure.
321 static Target::Target_info powerpc_info;
322
323 // The types of GOT entries needed for this platform.
324 enum Got_type
325 {
326 GOT_TYPE_STANDARD = 0, // GOT entry for a regular symbol
327 GOT_TYPE_TLS_OFFSET = 1, // GOT entry for TLS offset
328 GOT_TYPE_TLS_PAIR = 2, // GOT entry for TLS module/offset pair
329 };
330
331 // The GOT section.
332 Output_data_got<size, big_endian>* got_;
333 // The GOT2 section.
334 Output_data_space* got2_;
335 // The TOC section.
336 Output_data_space* toc_;
337 // The PLT section.
338 Output_data_plt_powerpc<size, big_endian>* plt_;
339 // The dynamic reloc section.
340 Reloc_section* rela_dyn_;
341 // Relocs saved to avoid a COPY reloc.
342 Copy_relocs<elfcpp::SHT_RELA, size, big_endian> copy_relocs_;
343 // Space for variables copied with a COPY reloc.
344 Output_data_space* dynbss_;
345 // Offset of the GOT entry for the TLS module index;
346 unsigned int got_mod_index_offset_;
347};
348
349template<>
350Target::Target_info Target_powerpc<32, true>::powerpc_info =
351{
352 32, // size
353 true, // is_big_endian
354 elfcpp::EM_PPC, // machine_code
355 false, // has_make_symbol
356 false, // has_resolve
357 false, // has_code_fill
358 true, // is_default_stack_executable
359 '\0', // wrap_char
360 "/usr/lib/ld.so.1", // dynamic_linker
361 0x10000000, // default_text_segment_address
362 64 * 1024, // abi_pagesize (overridable by -z max-page-size)
8a5e3e08
ILT		 363 4 * 1024, // common_pagesize (overridable by -z common-page-size)
364 elfcpp::SHN_UNDEF, // small_common_shndx
365 elfcpp::SHN_UNDEF, // large_common_shndx
366 0, // small_common_section_flags
05a352e6
DK		 367 0, // large_common_section_flags
368 NULL, // attributes_section
369 NULL // attributes_vendor
42cacb20
DE		 370};
371
372template<>
373Target::Target_info Target_powerpc<32, false>::powerpc_info =
374{
375 32, // size
376 false, // is_big_endian
377 elfcpp::EM_PPC, // machine_code
378 false, // has_make_symbol
379 false, // has_resolve
380 false, // has_code_fill
381 true, // is_default_stack_executable
382 '\0', // wrap_char
383 "/usr/lib/ld.so.1", // dynamic_linker
384 0x10000000, // default_text_segment_address
385 64 * 1024, // abi_pagesize (overridable by -z max-page-size)
8a5e3e08
ILT		 386 4 * 1024, // common_pagesize (overridable by -z common-page-size)
387 elfcpp::SHN_UNDEF, // small_common_shndx
388 elfcpp::SHN_UNDEF, // large_common_shndx
389 0, // small_common_section_flags
05a352e6
DK		 390 0, // large_common_section_flags
391 NULL, // attributes_section
392 NULL // attributes_vendor
42cacb20
DE		 393};
394
395template<>
396Target::Target_info Target_powerpc<64, true>::powerpc_info =
397{
398 64, // size
399 true, // is_big_endian
400 elfcpp::EM_PPC64, // machine_code
401 false, // has_make_symbol
402 false, // has_resolve
403 false, // has_code_fill
404 true, // is_default_stack_executable
405 '\0', // wrap_char
406 "/usr/lib/ld.so.1", // dynamic_linker
407 0x10000000, // default_text_segment_address
408 64 * 1024, // abi_pagesize (overridable by -z max-page-size)
8a5e3e08
ILT		 409 8 * 1024, // common_pagesize (overridable by -z common-page-size)
410 elfcpp::SHN_UNDEF, // small_common_shndx
411 elfcpp::SHN_UNDEF, // large_common_shndx
412 0, // small_common_section_flags
05a352e6
DK		 413 0, // large_common_section_flags
414 NULL, // attributes_section
415 NULL // attributes_vendor
42cacb20
DE		 416};
417
418template<>
419Target::Target_info Target_powerpc<64, false>::powerpc_info =
420{
421 64, // size
422 false, // is_big_endian
423 elfcpp::EM_PPC64, // machine_code
424 false, // has_make_symbol
425 false, // has_resolve
426 false, // has_code_fill
427 true, // is_default_stack_executable
428 '\0', // wrap_char
429 "/usr/lib/ld.so.1", // dynamic_linker
430 0x10000000, // default_text_segment_address
431 64 * 1024, // abi_pagesize (overridable by -z max-page-size)
8a5e3e08
ILT		 432 8 * 1024, // common_pagesize (overridable by -z common-page-size)
433 elfcpp::SHN_UNDEF, // small_common_shndx
434 elfcpp::SHN_UNDEF, // large_common_shndx
435 0, // small_common_section_flags
05a352e6
DK		 436 0, // large_common_section_flags
437 NULL, // attributes_section
438 NULL // attributes_vendor
42cacb20
DE		 439};
440
441template<int size, bool big_endian>
442class Powerpc_relocate_functions
443{
444private:
445 // Do a simple relocation with the addend in the relocation.
446 template<int valsize>
447 static inline void
448 rela(unsigned char* view,
449 unsigned int right_shift,
450 elfcpp::Elf_Xword dst_mask,
451 typename elfcpp::Swap<size, big_endian>::Valtype value,
452 typename elfcpp::Swap<size, 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 = ((value + 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.
467 template<int valsize>
468 static inline void
469 rela(unsigned char* view,
470 unsigned int right_shift,
471 elfcpp::Elf_Xword dst_mask,
472 const Sized_relobj<size, big_endian>* object,
473 const Symbol_value<size>* psymval,
474 typename elfcpp::Swap<valsize, big_endian>::Valtype addend)
475 {
476 typedef typename elfcpp::Swap<valsize, big_endian>::Valtype Valtype;
477 Valtype* wv = reinterpret_cast<Valtype*>(view);
478 Valtype val = elfcpp::Swap<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<valsize, big_endian>::writeval(wv, val | reloc);
485 }
486
487 // Do a simple relocation using a symbol value with the addend in
488 // the relocation, unaligned.
489 template<int valsize>
490 static inline void
491 rela_ua(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 {
497 typedef typename elfcpp::Swap_unaligned<valsize,
498 big_endian>::Valtype Valtype;
499 unsigned char* wv = view;
500 Valtype val = elfcpp::Swap_unaligned<valsize, big_endian>::readval(wv);
501 Valtype reloc = (psymval->value(object, addend) >> right_shift);
502
503 val &= ~dst_mask;
504 reloc &= dst_mask;
505
506 elfcpp::Swap_unaligned<valsize, big_endian>::writeval(wv, val | reloc);
507 }
508
509 // Do a simple PC relative relocation with a Symbol_value with the
510 // addend in the relocation.
511 template<int valsize>
512 static inline void
513 pcrela(unsigned char* view, unsigned int right_shift,
514 elfcpp::Elf_Xword dst_mask,
515 const Sized_relobj<size, big_endian>* object,
516 const Symbol_value<size>* psymval,
517 typename elfcpp::Swap<size, big_endian>::Valtype addend,
518 typename elfcpp::Elf_types<size>::Elf_Addr address)
519 {
520 typedef typename elfcpp::Swap<valsize, big_endian>::Valtype Valtype;
521 Valtype* wv = reinterpret_cast<Valtype*>(view);
522 Valtype val = elfcpp::Swap<valsize, big_endian>::readval(wv);
523 Valtype reloc = ((psymval->value(object, addend) - address)
524 >> right_shift);
525
526 val &= ~dst_mask;
527 reloc &= dst_mask;
528
529 elfcpp::Swap<valsize, big_endian>::writeval(wv, val | reloc);
530 }
531
532 template<int valsize>
533 static inline void
534 pcrela_unaligned(unsigned char* view,
535 const Sized_relobj<size, big_endian>* object,
536 const Symbol_value<size>* psymval,
537 typename elfcpp::Swap<size, big_endian>::Valtype addend,
538 typename elfcpp::Elf_types<size>::Elf_Addr address)
539 {
540 typedef typename elfcpp::Swap_unaligned<valsize,
541 big_endian>::Valtype Valtype;
542 unsigned char* wv = view;
543 Valtype reloc = (psymval->value(object, addend) - address);
544
545 elfcpp::Swap_unaligned<valsize, big_endian>::writeval(wv, reloc);
546 }
547
548 typedef Powerpc_relocate_functions<size, big_endian> This;
549 typedef Relocate_functions<size, big_endian> This_reloc;
550public:
551 // R_POWERPC_REL32: (Symbol + Addend - Address)
552 static inline void
553 rel32(unsigned char* view,
554 const Sized_relobj<size, big_endian>* object,
555 const Symbol_value<size>* psymval,
556 typename elfcpp::Elf_types<size>::Elf_Addr addend,
557 typename elfcpp::Elf_types<size>::Elf_Addr address)
558 { This_reloc::pcrela32(view, object, psymval, addend, address); }
559
560 // R_POWERPC_REL24: (Symbol + Addend - Address) & 0x3fffffc
561 static inline void
562 rel24(unsigned char* view,
563 const Sized_relobj<size, big_endian>* object,
564 const Symbol_value<size>* psymval,
565 typename elfcpp::Elf_types<size>::Elf_Addr addend,
566 typename elfcpp::Elf_types<size>::Elf_Addr address)
567 {
568 This::template pcrela<32>(view, 0, 0x03fffffc, object,
569 psymval, addend, address);
570 }
571
572 // R_POWERPC_REL14: (Symbol + Addend - Address) & 0xfffc
573 static inline void
574 rel14(unsigned char* view,
575 const Sized_relobj<size, big_endian>* object,
576 const Symbol_value<size>* psymval,
577 typename elfcpp::Elf_types<size>::Elf_Addr addend,
578 typename elfcpp::Elf_types<size>::Elf_Addr address)
579 {
580 This::template pcrela<32>(view, 0, 0x0000fffc, object,
581 psymval, addend, address);
582 }
583
584 // R_POWERPC_ADDR16: (Symbol + Addend) & 0xffff
585 static inline void
586 addr16(unsigned char* view,
587 typename elfcpp::Elf_types<size>::Elf_Addr value,
588 typename elfcpp::Elf_types<size>::Elf_Addr addend)
589 { This_reloc::rela16(view, value, addend); }
590
591 static inline void
592 addr16(unsigned char* view,
593 const Sized_relobj<size, big_endian>* object,
594 const Symbol_value<size>* psymval,
595 typename elfcpp::Elf_types<size>::Elf_Addr addend)
596 { This_reloc::rela16(view, object, psymval, addend); }
597
598 // R_POWERPC_ADDR16_DS: (Symbol + Addend) & 0xfffc
599 static inline void
600 addr16_ds(unsigned char* view,
601 typename elfcpp::Elf_types<size>::Elf_Addr value,
602 typename elfcpp::Elf_types<size>::Elf_Addr addend)
603 {
604 This::template rela<16>(view, 0, 0xfffc, value, addend);
605 }
606
607 // R_POWERPC_ADDR16_LO: (Symbol + Addend) & 0xffff
608 static inline void
609 addr16_lo(unsigned char* view,
610 typename elfcpp::Elf_types<size>::Elf_Addr value,
611 typename elfcpp::Elf_types<size>::Elf_Addr addend)
612 { This_reloc::rela16(view, value, addend); }
613
614 static inline void
615 addr16_lo(unsigned char* view,
616 const Sized_relobj<size, big_endian>* object,
617 const Symbol_value<size>* psymval,
618 typename elfcpp::Elf_types<size>::Elf_Addr addend)
619 { This_reloc::rela16(view, object, psymval, addend); }
620
621 // R_POWERPC_ADDR16_HI: ((Symbol + Addend) >> 16) & 0xffff
622 static inline void
623 addr16_hi(unsigned char* view,
624 typename elfcpp::Elf_types<size>::Elf_Addr value,
625 typename elfcpp::Elf_types<size>::Elf_Addr addend)
626 {
627 This::template rela<16>(view, 16, 0xffff, value, addend);
628 }
629
630 static inline void
631 addr16_hi(unsigned char* view,
632 const Sized_relobj<size, big_endian>* object,
633 const Symbol_value<size>* psymval,
634 typename elfcpp::Elf_types<size>::Elf_Addr addend)
635 {
636 This::template rela<16>(view, 16, 0xffff, object, psymval, addend);
637 }
638
639 // R_POWERPC_ADDR16_HA: Same as R_POWERPC_ADDR16_HI except that if the
640 // final value of the low 16 bits of the
641 // relocation is negative, add one.
642 static inline void
643 addr16_ha(unsigned char* view,
644 typename elfcpp::Elf_types<size>::Elf_Addr value,
645 typename elfcpp::Elf_types<size>::Elf_Addr addend)
646 {
42cacb20
DE		 647 typename elfcpp::Elf_types<size>::Elf_Addr reloc;
648
649 reloc = value + addend;
650
651 if (reloc & 0x8000)
652 reloc += 0x10000;
653 reloc >>= 16;
654
e6fde208 655 elfcpp::Swap<16, big_endian>::writeval(view, reloc);
42cacb20
DE		 656 }
657
658 static inline void
659 addr16_ha(unsigned char* view,
660 const Sized_relobj<size, big_endian>* object,
661 const Symbol_value<size>* psymval,
662 typename elfcpp::Elf_types<size>::Elf_Addr addend)
663 {
42cacb20
DE		 664 typename elfcpp::Elf_types<size>::Elf_Addr reloc;
665
666 reloc = psymval->value(object, addend);
667
668 if (reloc & 0x8000)
669 reloc += 0x10000;
670 reloc >>= 16;
671
e6fde208 672 elfcpp::Swap<16, big_endian>::writeval(view, reloc);
42cacb20
DE		 673 }
674
675 // R_PPC_REL16: (Symbol + Addend - Address) & 0xffff
676 static inline void
677 rel16(unsigned char* view,
678 const Sized_relobj<size, big_endian>* object,
679 const Symbol_value<size>* psymval,
680 typename elfcpp::Elf_types<size>::Elf_Addr addend,
681 typename elfcpp::Elf_types<size>::Elf_Addr address)
682 { This_reloc::pcrela16(view, object, psymval, addend, address); }
683
684 // R_PPC_REL16_LO: (Symbol + Addend - Address) & 0xffff
685 static inline void
686 rel16_lo(unsigned char* view,
687 const Sized_relobj<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 { This_reloc::pcrela16(view, object, psymval, addend, address); }
692
693 // R_PPC_REL16_HI: ((Symbol + Addend - Address) >> 16) & 0xffff
694 static inline void
695 rel16_hi(unsigned char* view,
696 const Sized_relobj<size, big_endian>* object,
697 const Symbol_value<size>* psymval,
698 typename elfcpp::Elf_types<size>::Elf_Addr addend,
699 typename elfcpp::Elf_types<size>::Elf_Addr address)
700 {
701 This::template pcrela<16>(view, 16, 0xffff, object,
702 psymval, addend, address);
703 }
704
705 // R_PPC_REL16_HA: Same as R_PPC_REL16_HI except that if the
706 // final value of the low 16 bits of the
707 // relocation is negative, add one.
708 static inline void
709 rel16_ha(unsigned char* view,
710 const Sized_relobj<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 {
42cacb20
DE		 715 typename elfcpp::Elf_types<size>::Elf_Addr reloc;
716
717 reloc = (psymval->value(object, addend) - address);
718 if (reloc & 0x8000)
719 reloc += 0x10000;
720 reloc >>= 16;
721
83d22aa8 722 elfcpp::Swap<16, big_endian>::writeval(view, reloc);
42cacb20
DE		 723 }
724};
725
726// Get the GOT section, creating it if necessary.
727
728template<int size, bool big_endian>
729Output_data_got<size, big_endian>*
730Target_powerpc<size, big_endian>::got_section(Symbol_table* symtab,
731 Layout* layout)
732{
733 if (this->got_ == NULL)
734 {
735 gold_assert(symtab != NULL && layout != NULL);
736
737 this->got_ = new Output_data_got<size, big_endian>();
738
739 layout->add_output_section_data(".got", elfcpp::SHT_PROGBITS,
740 elfcpp::SHF_ALLOC | elfcpp::SHF_WRITE,
1a2dff53 741 this->got_, false, false, false, false);
42cacb20
DE		 742
743 // Create the GOT2 or TOC in the .got section.
744 if (size == 32)
745 {
746 this->got2_ = new Output_data_space(4, "** GOT2");
747 layout->add_output_section_data(".got2", elfcpp::SHT_PROGBITS,
748 elfcpp::SHF_ALLOC
749 | elfcpp::SHF_WRITE,
1a2dff53
ILT		 750 this->got2_, false, false, false,
751 false);
42cacb20
DE		 752 }
753 else
754 {
755 this->toc_ = new Output_data_space(8, "** TOC");
756 layout->add_output_section_data(".toc", elfcpp::SHT_PROGBITS,
757 elfcpp::SHF_ALLOC
758 | elfcpp::SHF_WRITE,
1a2dff53
ILT		 759 this->toc_, false, false, false,
760 false);
42cacb20
DE		 761 }
762
763 // Define _GLOBAL_OFFSET_TABLE_ at the start of the .got section.
764 symtab->define_in_output_data("_GLOBAL_OFFSET_TABLE_", NULL,
99fff23b 765 Symbol_table::PREDEFINED,
42cacb20
DE		 766 this->got_,
767 0, 0, elfcpp::STT_OBJECT,
768 elfcpp::STB_LOCAL,
769 elfcpp::STV_HIDDEN, 0,
770 false, false);
771 }
772
773 return this->got_;
774}
775
776// Get the dynamic reloc section, creating it if necessary.
777
778template<int size, bool big_endian>
779typename Target_powerpc<size, big_endian>::Reloc_section*
780Target_powerpc<size, big_endian>::rela_dyn_section(Layout* layout)
781{
782 if (this->rela_dyn_ == NULL)
783 {
784 gold_assert(layout != NULL);
785 this->rela_dyn_ = new Reloc_section(parameters->options().combreloc());
786 layout->add_output_section_data(".rela.dyn", elfcpp::SHT_RELA,
1a2dff53
ILT		 787 elfcpp::SHF_ALLOC, this->rela_dyn_, true,
788 false, false, false);
42cacb20
DE		 789 }
790 return this->rela_dyn_;
791}
792
793// A class to handle the PLT data.
794
795template<int size, bool big_endian>
796class Output_data_plt_powerpc : public Output_section_data
797{
798 public:
799 typedef Output_data_reloc<elfcpp::SHT_RELA, true,
800 size, big_endian> Reloc_section;
801
802 Output_data_plt_powerpc(Layout*);
803
804 // Add an entry to the PLT.
805 void add_entry(Symbol* gsym);
806
807 // Return the .rela.plt section data.
808 const Reloc_section* rel_plt() const
809 {
810 return this->rel_;
811 }
812
813 protected:
814 void do_adjust_output_section(Output_section* os);
815
816 private:
817 // The size of an entry in the PLT.
818 static const int base_plt_entry_size = (size == 32 ? 16 : 24);
819
820 // Set the final size.
821 void
822 set_final_data_size()
823 {
824 unsigned int full_count = this->count_ + 4;
825
826 this->set_data_size(full_count * base_plt_entry_size);
827 }
828
829 // Write out the PLT data.
830 void
831 do_write(Output_file*);
832
833 // The reloc section.
834 Reloc_section* rel_;
835 // The number of PLT entries.
836 unsigned int count_;
837};
838
839// Create the PLT section. The ordinary .got section is an argument,
840// since we need to refer to the start.
841
842template<int size, bool big_endian>
843Output_data_plt_powerpc<size, big_endian>::Output_data_plt_powerpc(Layout* layout)
844 : Output_section_data(size == 32 ? 4 : 8), count_(0)
845{
846 this->rel_ = new Reloc_section(false);
847 layout->add_output_section_data(".rela.plt", elfcpp::SHT_RELA,
1a2dff53
ILT		 848 elfcpp::SHF_ALLOC, this->rel_, true, false,
849 false, false);
42cacb20
DE		 850}
851
852template<int size, bool big_endian>
853void
854Output_data_plt_powerpc<size, big_endian>::do_adjust_output_section(Output_section* os)
855{
856 os->set_entsize(0);
857}
858
859// Add an entry to the PLT.
860
861template<int size, bool big_endian>
862void
863Output_data_plt_powerpc<size, big_endian>::add_entry(Symbol* gsym)
864{
865 gold_assert(!gsym->has_plt_offset());
866 unsigned int index = this->count_+ + 4;
867 section_offset_type plt_offset;
868
869 if (index < 8192)
870 plt_offset = index * base_plt_entry_size;
871 else
872 gold_unreachable();
873
874 gsym->set_plt_offset(plt_offset);
875
876 ++this->count_;
877
878 gsym->set_needs_dynsym_entry();
879 this->rel_->add_global(gsym, elfcpp::R_POWERPC_JMP_SLOT, this,
880 plt_offset, 0);
881}
882
883static const unsigned int addis_11_11 = 0x3d6b0000;
884static const unsigned int addis_11_30 = 0x3d7e0000;
885static const unsigned int addis_12_12 = 0x3d8c0000;
886static const unsigned int addi_11_11 = 0x396b0000;
887static const unsigned int add_0_11_11 = 0x7c0b5a14;
888static const unsigned int add_11_0_11 = 0x7d605a14;
889static const unsigned int b = 0x48000000;
890static const unsigned int bcl_20_31 = 0x429f0005;
891static const unsigned int bctr = 0x4e800420;
892static const unsigned int lis_11 = 0x3d600000;
893static const unsigned int lis_12 = 0x3d800000;
894static const unsigned int lwzu_0_12 = 0x840c0000;
895static const unsigned int lwz_0_12 = 0x800c0000;
896static const unsigned int lwz_11_11 = 0x816b0000;
897static const unsigned int lwz_11_30 = 0x817e0000;
898static const unsigned int lwz_12_12 = 0x818c0000;
899static const unsigned int mflr_0 = 0x7c0802a6;
900static const unsigned int mflr_12 = 0x7d8802a6;
901static const unsigned int mtctr_0 = 0x7c0903a6;
902static const unsigned int mtctr_11 = 0x7d6903a6;
903static const unsigned int mtlr_0 = 0x7c0803a6;
904static const unsigned int nop = 0x60000000;
905static const unsigned int sub_11_11_12 = 0x7d6c5850;
906
907static const unsigned int addis_r12_r2 = 0x3d820000; /* addis %r12,%r2,xxx@ha */
908static const unsigned int std_r2_40r1 = 0xf8410028; /* std %r2,40(%r1) */
909static const unsigned int ld_r11_0r12 = 0xe96c0000; /* ld %r11,xxx+0@l(%r12) */
910static const unsigned int ld_r2_0r12 = 0xe84c0000; /* ld %r2,xxx+8@l(%r12) */
911 /* ld %r11,xxx+16@l(%r12) */
912
913
914// Write out the PLT.
915
916template<int size, bool big_endian>
917void
918Output_data_plt_powerpc<size, big_endian>::do_write(Output_file* of)
919{
2ea97941 920 const off_t offset = this->offset();
42cacb20
DE		 921 const section_size_type oview_size =
922 convert_to_section_size_type(this->data_size());
2ea97941 923 unsigned char* const oview = of->get_output_view(offset, oview_size);
42cacb20
DE		 924 unsigned char* pov = oview;
925
926 memset(pov, 0, base_plt_entry_size * 4);
927 pov += base_plt_entry_size * 4;
928
929 unsigned int plt_offset = base_plt_entry_size * 4;
930 const unsigned int count = this->count_;
931
932 if (size == 64)
933 {
934 for (unsigned int i = 0; i < count; i++)
935 {
936 }
937 }
938 else
939 {
940 for (unsigned int i = 0; i < count; i++)
941 {
942 elfcpp::Swap<32, true>::writeval(pov + 0x00,
943 lwz_11_30 + plt_offset);
944 elfcpp::Swap<32, true>::writeval(pov + 0x04, mtctr_11);
945 elfcpp::Swap<32, true>::writeval(pov + 0x08, bctr);
ce3ac18a 946 elfcpp::Swap<32, true>::writeval(pov + 0x0c, nop);
42cacb20
DE		 947 pov += base_plt_entry_size;
948 plt_offset += base_plt_entry_size;
949 }
950 }
951
952 gold_assert(static_cast<section_size_type>(pov - oview) == oview_size);
953
2ea97941 954 of->write_output_view(offset, oview_size, oview);
42cacb20
DE		 955}
956
957// Create a PLT entry for a global symbol.
958
959template<int size, bool big_endian>
960void
961Target_powerpc<size, big_endian>::make_plt_entry(Symbol_table* symtab,
962 Layout* layout,
963 Symbol* gsym)
964{
965 if (gsym->has_plt_offset())
966 return;
967
968 if (this->plt_ == NULL)
969 {
970 // Create the GOT section first.
971 this->got_section(symtab, layout);
972
612a8d3d
DM		 973 // Ensure that .rela.dyn always appears before .rela.plt This is
974 // necessary due to how, on PowerPC and some other targets, .rela.dyn
975 // needs to include .rela.plt in it's range.
976 this->rela_dyn_section(layout);
977
42cacb20
DE		 978 this->plt_ = new Output_data_plt_powerpc<size, big_endian>(layout);
979 layout->add_output_section_data(".plt", elfcpp::SHT_PROGBITS,
980 (elfcpp::SHF_ALLOC
981 | elfcpp::SHF_EXECINSTR
982 | elfcpp::SHF_WRITE),
1a2dff53 983 this->plt_, false, false, false, false);
42cacb20
DE		 984
985 // Define _PROCEDURE_LINKAGE_TABLE_ at the start of the .plt section.
986 symtab->define_in_output_data("_PROCEDURE_LINKAGE_TABLE_", NULL,
99fff23b 987 Symbol_table::PREDEFINED,
42cacb20
DE		 988 this->plt_,
989 0, 0, elfcpp::STT_OBJECT,
990 elfcpp::STB_LOCAL,
991 elfcpp::STV_HIDDEN, 0,
992 false, false);
993 }
994
995 this->plt_->add_entry(gsym);
996}
997
998// Create a GOT entry for the TLS module index.
999
1000template<int size, bool big_endian>
1001unsigned int
1002Target_powerpc<size, big_endian>::got_mod_index_entry(Symbol_table* symtab,
1003 Layout* layout,
1004 Sized_relobj<size, big_endian>* object)
1005{
1006 if (this->got_mod_index_offset_ == -1U)
1007 {
1008 gold_assert(symtab != NULL && layout != NULL && object != NULL);
1009 Reloc_section* rela_dyn = this->rela_dyn_section(layout);
1010 Output_data_got<size, big_endian>* got;
1011 unsigned int got_offset;
1012
1013 got = this->got_section(symtab, layout);
1014 got_offset = got->add_constant(0);
1015 rela_dyn->add_local(object, 0, elfcpp::R_POWERPC_DTPMOD, got,
1016 got_offset, 0);
1017 got->add_constant(0);
1018 this->got_mod_index_offset_ = got_offset;
1019 }
1020 return this->got_mod_index_offset_;
1021}
1022
1023// Optimize the TLS relocation type based on what we know about the
1024// symbol. IS_FINAL is true if the final address of this symbol is
1025// known at link time.
1026
1027static tls::Tls_optimization
1028optimize_tls_reloc(bool /* is_final */, int r_type)
1029{
1030 // If we are generating a shared library, then we can't do anything
1031 // in the linker.
1032 if (parameters->options().shared())
1033 return tls::TLSOPT_NONE;
1034 switch (r_type)
1035 {
1036 // XXX
1037 default:
1038 gold_unreachable();
1039 }
1040}
1041
1042// Report an unsupported relocation against a local symbol.
1043
1044template<int size, bool big_endian>
1045void
1046Target_powerpc<size, big_endian>::Scan::unsupported_reloc_local(
1047 Sized_relobj<size, big_endian>* object,
1048 unsigned int r_type)
1049{
1050 gold_error(_("%s: unsupported reloc %u against local symbol"),
1051 object->name().c_str(), r_type);
1052}
1053
1054// We are about to emit a dynamic relocation of type R_TYPE. If the
1055// dynamic linker does not support it, issue an error.
1056
1057template<int size, bool big_endian>
1058void
1059Target_powerpc<size, big_endian>::Scan::check_non_pic(Relobj* object,
1060 unsigned int r_type)
1061{
1062 gold_assert(r_type != elfcpp::R_POWERPC_NONE);
1063
1064 // These are the relocation types supported by glibc for both 32-bit
1065 // and 64-bit powerpc.
1066 switch (r_type)
1067 {
1068 case elfcpp::R_POWERPC_RELATIVE:
1069 case elfcpp::R_POWERPC_GLOB_DAT:
1070 case elfcpp::R_POWERPC_DTPMOD:
1071 case elfcpp::R_POWERPC_DTPREL:
1072 case elfcpp::R_POWERPC_TPREL:
1073 case elfcpp::R_POWERPC_JMP_SLOT:
1074 case elfcpp::R_POWERPC_COPY:
1075 case elfcpp::R_POWERPC_ADDR32:
1076 case elfcpp::R_POWERPC_ADDR24:
1077 case elfcpp::R_POWERPC_REL24:
1078 return;
1079
1080 default:
1081 break;
1082 }
1083
1084 if (size == 64)
1085 {
1086 switch (r_type)
1087 {
1088 // These are the relocation types supported only on 64-bit.
1089 case elfcpp::R_PPC64_ADDR64:
1090 case elfcpp::R_PPC64_TPREL16_LO_DS:
1091 case elfcpp::R_PPC64_TPREL16_DS:
1092 case elfcpp::R_POWERPC_TPREL16:
1093 case elfcpp::R_POWERPC_TPREL16_LO:
1094 case elfcpp::R_POWERPC_TPREL16_HI:
1095 case elfcpp::R_POWERPC_TPREL16_HA:
1096 case elfcpp::R_PPC64_TPREL16_HIGHER:
1097 case elfcpp::R_PPC64_TPREL16_HIGHEST:
1098 case elfcpp::R_PPC64_TPREL16_HIGHERA:
1099 case elfcpp::R_PPC64_TPREL16_HIGHESTA:
1100 case elfcpp::R_PPC64_ADDR16_LO_DS:
1101 case elfcpp::R_POWERPC_ADDR16_LO:
1102 case elfcpp::R_POWERPC_ADDR16_HI:
1103 case elfcpp::R_POWERPC_ADDR16_HA:
1104 case elfcpp::R_POWERPC_ADDR30:
1105 case elfcpp::R_PPC64_UADDR64:
1106 case elfcpp::R_POWERPC_UADDR32:
1107 case elfcpp::R_POWERPC_ADDR16:
1108 case elfcpp::R_POWERPC_UADDR16:
1109 case elfcpp::R_PPC64_ADDR16_DS:
1110 case elfcpp::R_PPC64_ADDR16_HIGHER:
1111 case elfcpp::R_PPC64_ADDR16_HIGHEST:
1112 case elfcpp::R_PPC64_ADDR16_HIGHERA:
1113 case elfcpp::R_PPC64_ADDR16_HIGHESTA:
1114 case elfcpp::R_POWERPC_ADDR14_BRTAKEN:
1115 case elfcpp::R_POWERPC_ADDR14_BRNTAKEN:
1116 case elfcpp::R_POWERPC_REL32:
1117 case elfcpp::R_PPC64_REL64:
1118 return;
1119
1120 default:
1121 break;
1122 }
1123 }
1124 else
1125 {
1126 switch (r_type)
1127 {
1128 // These are the relocation types supported only on 32-bit.
1129
1130 default:
1131 break;
1132 }
1133 }
1134
1135 // This prevents us from issuing more than one error per reloc
1136 // section. But we can still wind up issuing more than one
1137 // error per object file.
1138 if (this->issued_non_pic_error_)
1139 return;
33aea2fd 1140 gold_assert(parameters->options().output_is_position_independent());
42cacb20
DE		 1141 object->error(_("requires unsupported dynamic reloc; "
1142 "recompile with -fPIC"));
1143 this->issued_non_pic_error_ = true;
1144 return;
1145}
1146
1147// Scan a relocation for a local symbol.
1148
1149template<int size, bool big_endian>
1150inline void
1151Target_powerpc<size, big_endian>::Scan::local(
42cacb20
DE		 1152 Symbol_table* symtab,
1153 Layout* layout,
1154 Target_powerpc<size, big_endian>* target,
1155 Sized_relobj<size, big_endian>* object,
1156 unsigned int data_shndx,
1157 Output_section* output_section,
1158 const elfcpp::Rela<size, big_endian>& reloc,
1159 unsigned int r_type,
1160 const elfcpp::Sym<size, big_endian>& lsym)
1161{
1162 switch (r_type)
1163 {
1164 case elfcpp::R_POWERPC_NONE:
1165 case elfcpp::R_POWERPC_GNU_VTINHERIT:
1166 case elfcpp::R_POWERPC_GNU_VTENTRY:
1167 break;
1168
1169 case elfcpp::R_PPC64_ADDR64:
1170 case elfcpp::R_POWERPC_ADDR32:
1171 case elfcpp::R_POWERPC_ADDR16_HA:
1172 case elfcpp::R_POWERPC_ADDR16_LO:
1173 // If building a shared library (or a position-independent
1174 // executable), we need to create a dynamic relocation for
1175 // this location.
1176 if (parameters->options().output_is_position_independent())
1177 {
1178 Reloc_section* rela_dyn = target->rela_dyn_section(layout);
1179
1180 check_non_pic(object, r_type);
1181 if (lsym.get_st_type() != elfcpp::STT_SECTION)
1182 {
1183 unsigned int r_sym = elfcpp::elf_r_sym<size>(reloc.get_r_info());
1184 rela_dyn->add_local(object, r_sym, r_type, output_section,
1185 data_shndx, reloc.get_r_offset(),
1186 reloc.get_r_addend());
1187 }
1188 else
1189 {
1190 unsigned int r_sym = elfcpp::elf_r_sym<size>(reloc.get_r_info());
1191 gold_assert(lsym.get_st_value() == 0);
1192 rela_dyn->add_local_relative(object, r_sym, r_type,
1193 output_section, data_shndx,
1194 reloc.get_r_offset(),
1195 reloc.get_r_addend());
1196 }
1197 }
1198 break;
1199
1200 case elfcpp::R_POWERPC_REL24:
1201 case elfcpp::R_PPC_LOCAL24PC:
1202 case elfcpp::R_POWERPC_REL32:
1203 case elfcpp::R_PPC_REL16_LO:
1204 case elfcpp::R_PPC_REL16_HA:
1205 break;
1206
1207 case elfcpp::R_POWERPC_GOT16:
1208 case elfcpp::R_POWERPC_GOT16_LO:
1209 case elfcpp::R_POWERPC_GOT16_HI:
1210 case elfcpp::R_POWERPC_GOT16_HA:
1211 case elfcpp::R_PPC64_TOC16:
1212 case elfcpp::R_PPC64_TOC16_LO:
1213 case elfcpp::R_PPC64_TOC16_HI:
1214 case elfcpp::R_PPC64_TOC16_HA:
1215 case elfcpp::R_PPC64_TOC16_DS:
1216 case elfcpp::R_PPC64_TOC16_LO_DS:
1217 {
1218 // The symbol requires a GOT entry.
1219 Output_data_got<size, big_endian>* got;
1220 unsigned int r_sym;
1221
1222 got = target->got_section(symtab, layout);
1223 r_sym = elfcpp::elf_r_sym<size>(reloc.get_r_info());
1224
1225 // If we are generating a shared object, we need to add a
1226 // dynamic relocation for this symbol's GOT entry.
1227 if (parameters->options().output_is_position_independent())
1228 {
1229 if (!object->local_has_got_offset(r_sym, GOT_TYPE_STANDARD))
1230 {
1231 Reloc_section* rela_dyn = target->rela_dyn_section(layout);
1232 unsigned int off;
1233
1234 off = got->add_constant(0);
1235 object->set_local_got_offset(r_sym, GOT_TYPE_STANDARD, off);
1236 rela_dyn->add_local_relative(object, r_sym,
1237 elfcpp::R_POWERPC_RELATIVE,
1238 got, off, 0);
1239 }
1240 }
1241 else
1242 got->add_local(object, r_sym, GOT_TYPE_STANDARD);
1243 }
1244 break;
1245
1246 case elfcpp::R_PPC64_TOC:
1247 // We need a GOT section.
1248 target->got_section(symtab, layout);
1249 break;
1250
1251 // These are relocations which should only be seen by the
1252 // dynamic linker, and should never be seen here.
1253 case elfcpp::R_POWERPC_COPY:
1254 case elfcpp::R_POWERPC_GLOB_DAT:
1255 case elfcpp::R_POWERPC_JMP_SLOT:
1256 case elfcpp::R_POWERPC_RELATIVE:
1257 case elfcpp::R_POWERPC_DTPMOD:
1258 gold_error(_("%s: unexpected reloc %u in object file"),
1259 object->name().c_str(), r_type);
1260 break;
1261
1262 default:
1263 unsupported_reloc_local(object, r_type);
1264 break;
1265 }
1266}
1267
1268// Report an unsupported relocation against a global symbol.
1269
1270template<int size, bool big_endian>
1271void
1272Target_powerpc<size, big_endian>::Scan::unsupported_reloc_global(
1273 Sized_relobj<size, big_endian>* object,
1274 unsigned int r_type,
1275 Symbol* gsym)
1276{
1277 gold_error(_("%s: unsupported reloc %u against global symbol %s"),
1278 object->name().c_str(), r_type, gsym->demangled_name().c_str());
1279}
1280
1281// Scan a relocation for a global symbol.
1282
1283template<int size, bool big_endian>
1284inline void
1285Target_powerpc<size, big_endian>::Scan::global(
42cacb20
DE		 1286 Symbol_table* symtab,
1287 Layout* layout,
1288 Target_powerpc<size, big_endian>* target,
1289 Sized_relobj<size, big_endian>* object,
1290 unsigned int data_shndx,
1291 Output_section* output_section,
1292 const elfcpp::Rela<size, big_endian>& reloc,
1293 unsigned int r_type,
1294 Symbol* gsym)
1295{
1296 switch (r_type)
1297 {
1298 case elfcpp::R_POWERPC_NONE:
1299 case elfcpp::R_POWERPC_GNU_VTINHERIT:
1300 case elfcpp::R_POWERPC_GNU_VTENTRY:
1301 break;
1302
1303 case elfcpp::R_PPC_PLTREL24:
1304 // If the symbol is fully resolved, this is just a PC32 reloc.
1305 // Otherwise we need a PLT entry.
1306 if (gsym->final_value_is_known())
1307 break;
1308 // If building a shared library, we can also skip the PLT entry
1309 // if the symbol is defined in the output file and is protected
1310 // or hidden.
1311 if (gsym->is_defined()
1312 && !gsym->is_from_dynobj()
1313 && !gsym->is_preemptible())
1314 break;
1315 target->make_plt_entry(symtab, layout, gsym);
1316 break;
1317
1318 case elfcpp::R_POWERPC_ADDR16:
1319 case elfcpp::R_POWERPC_ADDR16_LO:
1320 case elfcpp::R_POWERPC_ADDR16_HI:
1321 case elfcpp::R_POWERPC_ADDR16_HA:
1322 case elfcpp::R_POWERPC_ADDR32:
1323 case elfcpp::R_PPC64_ADDR64:
1324 {
1325 // Make a PLT entry if necessary.
1326 if (gsym->needs_plt_entry())
1327 {
1328 target->make_plt_entry(symtab, layout, gsym);
1329 // Since this is not a PC-relative relocation, we may be
1330 // taking the address of a function. In that case we need to
1331 // set the entry in the dynamic symbol table to the address of
1332 // the PLT entry.
1333 if (gsym->is_from_dynobj() && !parameters->options().shared())
1334 gsym->set_needs_dynsym_value();
1335 }
1336 // Make a dynamic relocation if necessary.
1337 if (gsym->needs_dynamic_reloc(Symbol::ABSOLUTE_REF))
1338 {
966d4097 1339 if (gsym->may_need_copy_reloc())
42cacb20
DE		 1340 {
1341 target->copy_reloc(symtab, layout, object,
1342 data_shndx, output_section, gsym, reloc);
1343 }
1344 else if ((r_type == elfcpp::R_POWERPC_ADDR32
1345 || r_type == elfcpp::R_PPC64_ADDR64)
1346 && gsym->can_use_relative_reloc(false))
1347 {
1348 Reloc_section* rela_dyn = target->rela_dyn_section(layout);
1349 rela_dyn->add_global_relative(gsym, elfcpp::R_POWERPC_RELATIVE,
1350 output_section, object,
1351 data_shndx, reloc.get_r_offset(),
1352 reloc.get_r_addend());
1353 }
1354 else
1355 {
1356 Reloc_section* rela_dyn = target->rela_dyn_section(layout);
1357
1358 check_non_pic(object, r_type);
1359 if (gsym->is_from_dynobj()
1360 || gsym->is_undefined()
1361 || gsym->is_preemptible())
1362 rela_dyn->add_global(gsym, r_type, output_section,
1363 object, data_shndx,
1364 reloc.get_r_offset(),
1365 reloc.get_r_addend());
1366 else
1367 rela_dyn->add_global_relative(gsym, r_type,
1368 output_section, object,
1369 data_shndx,
1370 reloc.get_r_offset(),
1371 reloc.get_r_addend());
1372 }
1373 }
1374 }
1375 break;
1376
1377 case elfcpp::R_POWERPC_REL24:
1378 case elfcpp::R_PPC_LOCAL24PC:
1379 case elfcpp::R_PPC_REL16:
1380 case elfcpp::R_PPC_REL16_LO:
1381 case elfcpp::R_PPC_REL16_HI:
1382 case elfcpp::R_PPC_REL16_HA:
1383 {
1384 if (gsym->needs_plt_entry())
1385 target->make_plt_entry(symtab, layout, gsym);
1386 // Make a dynamic relocation if necessary.
1387 int flags = Symbol::NON_PIC_REF;
1388 if (gsym->type() == elfcpp::STT_FUNC)
1389 flags |= Symbol::FUNCTION_CALL;
1390 if (gsym->needs_dynamic_reloc(flags))
1391 {
966d4097 1392 if (gsym->may_need_copy_reloc())
42cacb20
DE		 1393 {
1394 target->copy_reloc(symtab, layout, object,
1395 data_shndx, output_section, gsym,
1396 reloc);
1397 }
1398 else
1399 {
1400 Reloc_section* rela_dyn = target->rela_dyn_section(layout);
1401 check_non_pic(object, r_type);
1402 rela_dyn->add_global(gsym, r_type, output_section, object,
1403 data_shndx, reloc.get_r_offset(),
1404 reloc.get_r_addend());
1405 }
1406 }
1407 }
1408 break;
1409
1410 case elfcpp::R_POWERPC_GOT16:
1411 case elfcpp::R_POWERPC_GOT16_LO:
1412 case elfcpp::R_POWERPC_GOT16_HI:
1413 case elfcpp::R_POWERPC_GOT16_HA:
1414 case elfcpp::R_PPC64_TOC16:
1415 case elfcpp::R_PPC64_TOC16_LO:
1416 case elfcpp::R_PPC64_TOC16_HI:
1417 case elfcpp::R_PPC64_TOC16_HA:
1418 case elfcpp::R_PPC64_TOC16_DS:
1419 case elfcpp::R_PPC64_TOC16_LO_DS:
1420 {
1421 // The symbol requires a GOT entry.
1422 Output_data_got<size, big_endian>* got;
1423
1424 got = target->got_section(symtab, layout);
1425 if (gsym->final_value_is_known())
1426 got->add_global(gsym, GOT_TYPE_STANDARD);
1427 else
1428 {
1429 // If this symbol is not fully resolved, we need to add a
1430 // dynamic relocation for it.
1431 Reloc_section* rela_dyn = target->rela_dyn_section(layout);
1432 if (gsym->is_from_dynobj()
1433 || gsym->is_undefined()
1434 || gsym->is_preemptible())
1435 got->add_global_with_rela(gsym, GOT_TYPE_STANDARD, rela_dyn,
1436 elfcpp::R_POWERPC_GLOB_DAT);
1437 else if (!gsym->has_got_offset(GOT_TYPE_STANDARD))
1438 {
1439 unsigned int off = got->add_constant(0);
1440
1441 gsym->set_got_offset(GOT_TYPE_STANDARD, off);
1442 rela_dyn->add_global_relative(gsym, elfcpp::R_POWERPC_RELATIVE,
1443 got, off, 0);
1444 }
1445 }
1446 }
1447 break;
1448
1449 case elfcpp::R_PPC64_TOC:
1450 // We need a GOT section.
1451 target->got_section(symtab, layout);
1452 break;
1453
1454 case elfcpp::R_POWERPC_GOT_TPREL16:
1455 case elfcpp::R_POWERPC_TLS:
1456 // XXX TLS
1457 break;
1458
1459 // These are relocations which should only be seen by the
1460 // dynamic linker, and should never be seen here.
1461 case elfcpp::R_POWERPC_COPY:
1462 case elfcpp::R_POWERPC_GLOB_DAT:
1463 case elfcpp::R_POWERPC_JMP_SLOT:
1464 case elfcpp::R_POWERPC_RELATIVE:
1465 case elfcpp::R_POWERPC_DTPMOD:
1466 gold_error(_("%s: unexpected reloc %u in object file"),
1467 object->name().c_str(), r_type);
1468 break;
1469
1470 default:
1471 unsupported_reloc_global(object, r_type, gsym);
1472 break;
1473 }
1474}
1475
6d03d481
ST		 1476// Process relocations for gc.
1477
1478template<int size, bool big_endian>
1479void
1480Target_powerpc<size, big_endian>::gc_process_relocs(
6d03d481
ST		 1481 Symbol_table* symtab,
1482 Layout* layout,
1483 Sized_relobj<size, big_endian>* object,
1484 unsigned int data_shndx,
1485 unsigned int,
1486 const unsigned char* prelocs,
1487 size_t reloc_count,
1488 Output_section* output_section,
1489 bool needs_special_offset_handling,
1490 size_t local_symbol_count,
1491 const unsigned char* plocal_symbols)
1492{
1493 typedef Target_powerpc<size, big_endian> Powerpc;
2ea97941 1494 typedef typename Target_powerpc<size, big_endian>::Scan Scan;
6d03d481 1495
2ea97941 1496 gold::gc_process_relocs<size, big_endian, Powerpc, elfcpp::SHT_RELA, Scan>(
6d03d481
ST		 1497 symtab,
1498 layout,
1499 this,
1500 object,
1501 data_shndx,
1502 prelocs,
1503 reloc_count,
1504 output_section,
1505 needs_special_offset_handling,
1506 local_symbol_count,
1507 plocal_symbols);
1508}
1509
42cacb20
DE		 1510// Scan relocations for a section.
1511
1512template<int size, bool big_endian>
1513void
1514Target_powerpc<size, big_endian>::scan_relocs(
42cacb20
DE		 1515 Symbol_table* symtab,
1516 Layout* layout,
1517 Sized_relobj<size, big_endian>* object,
1518 unsigned int data_shndx,
1519 unsigned int sh_type,
1520 const unsigned char* prelocs,
1521 size_t reloc_count,
1522 Output_section* output_section,
1523 bool needs_special_offset_handling,
1524 size_t local_symbol_count,
1525 const unsigned char* plocal_symbols)
1526{
1527 typedef Target_powerpc<size, big_endian> Powerpc;
2ea97941 1528 typedef typename Target_powerpc<size, big_endian>::Scan Scan;
42cacb20
DE		 1529 static Output_data_space* sdata;
1530
1531 if (sh_type == elfcpp::SHT_REL)
1532 {
1533 gold_error(_("%s: unsupported REL reloc section"),
1534 object->name().c_str());
1535 return;
1536 }
1537
1538 // Define _SDA_BASE_ at the start of the .sdata section.
1539 if (sdata == NULL)
1540 {
1541 // layout->find_output_section(".sdata") == NULL
1542 sdata = new Output_data_space(4, "** sdata");
1543 Output_section* os = layout->add_output_section_data(".sdata", 0,
1544 elfcpp::SHF_ALLOC
1545 | elfcpp::SHF_WRITE,
1a2dff53
ILT		 1546 sdata, false,
1547 false, false, false);
42cacb20 1548 symtab->define_in_output_data("_SDA_BASE_", NULL,
99fff23b 1549 Symbol_table::PREDEFINED,
42cacb20
DE		 1550 os,
1551 32768, 0,
1552 elfcpp::STT_OBJECT,
1553 elfcpp::STB_LOCAL,
1554 elfcpp::STV_HIDDEN, 0,
1555 false, false);
1556 }
1557
2ea97941 1558 gold::scan_relocs<size, big_endian, Powerpc, elfcpp::SHT_RELA, Scan>(
42cacb20
DE		 1559 symtab,
1560 layout,
1561 this,
1562 object,
1563 data_shndx,
1564 prelocs,
1565 reloc_count,
1566 output_section,
1567 needs_special_offset_handling,
1568 local_symbol_count,
1569 plocal_symbols);
1570}
1571
1572// Finalize the sections.
1573
1574template<int size, bool big_endian>
1575void
d5b40221
DK		 1576Target_powerpc<size, big_endian>::do_finalize_sections(
1577 Layout* layout,
f59f41f3
DK		 1578 const Input_objects*,
1579 Symbol_table*)
42cacb20
DE		 1580{
1581 // Fill in some more dynamic tags.
ea715a34
ILT		 1582 const Reloc_section* rel_plt = (this->plt_ == NULL
1583 ? NULL
1584 : this->plt_->rel_plt());
1585 layout->add_target_dynamic_tags(false, this->plt_, rel_plt,
612a8d3d 1586 this->rela_dyn_, true, size == 32);
42cacb20
DE		 1587
1588 // Emit any relocs we saved in an attempt to avoid generating COPY
1589 // relocs.
1590 if (this->copy_relocs_.any_saved_relocs())
1591 this->copy_relocs_.emit(this->rela_dyn_section(layout));
1592}
1593
1594// Perform a relocation.
1595
1596template<int size, bool big_endian>
1597inline bool
1598Target_powerpc<size, big_endian>::Relocate::relocate(
1599 const Relocate_info<size, big_endian>* relinfo,
1600 Target_powerpc* target,
031cdbed 1601 Output_section*,
42cacb20
DE		 1602 size_t relnum,
1603 const elfcpp::Rela<size, big_endian>& rela,
1604 unsigned int r_type,
1605 const Sized_symbol<size>* gsym,
1606 const Symbol_value<size>* psymval,
1607 unsigned char* view,
1608 typename elfcpp::Elf_types<size>::Elf_Addr address,
1609 section_size_type /* view_size */)
1610{
1611 const unsigned int toc_base_offset = 0x8000;
1612 typedef Powerpc_relocate_functions<size, big_endian> Reloc;
1613
1614 // Pick the value to use for symbols defined in shared objects.
1615 Symbol_value<size> symval;
1616 if (gsym != NULL
de4c45bd
ILT		 1617 && gsym->use_plt_offset(r_type == elfcpp::R_POWERPC_REL24
1618 || r_type == elfcpp::R_PPC_LOCAL24PC
1619 || r_type == elfcpp::R_PPC_REL16
1620 || r_type == elfcpp::R_PPC_REL16_LO
1621 || r_type == elfcpp::R_PPC_REL16_HI
1622 || r_type == elfcpp::R_PPC_REL16_HA))
42cacb20
DE		 1623 {
1624 elfcpp::Elf_Xword value;
1625
1626 value = target->plt_section()->address() + gsym->plt_offset();
1627
1628 symval.set_output_value(value);
1629
1630 psymval = &symval;
1631 }
1632
1633 const Sized_relobj<size, big_endian>* object = relinfo->object;
1634 elfcpp::Elf_Xword addend = rela.get_r_addend();
1635
1636 // Get the GOT offset if needed. Unlike i386 and x86_64, our GOT
1637 // pointer points to the beginning, not the end, of the table.
1638 // So we just use the plain offset.
42cacb20
DE		 1639 unsigned int got_offset = 0;
1640 unsigned int got2_offset = 0;
1641 switch (r_type)
1642 {
1643 case elfcpp::R_PPC64_TOC16:
1644 case elfcpp::R_PPC64_TOC16_LO:
1645 case elfcpp::R_PPC64_TOC16_HI:
1646 case elfcpp::R_PPC64_TOC16_HA:
1647 case elfcpp::R_PPC64_TOC16_DS:
1648 case elfcpp::R_PPC64_TOC16_LO_DS:
1649 // Subtract the TOC base address.
1650 addend -= target->toc_section()->address() + toc_base_offset;
1651 /* FALLTHRU */
1652
1653 case elfcpp::R_POWERPC_GOT16:
1654 case elfcpp::R_POWERPC_GOT16_LO:
1655 case elfcpp::R_POWERPC_GOT16_HI:
1656 case elfcpp::R_POWERPC_GOT16_HA:
1657 case elfcpp::R_PPC64_GOT16_DS:
1658 case elfcpp::R_PPC64_GOT16_LO_DS:
1659 if (gsym != NULL)
1660 {
1661 gold_assert(gsym->has_got_offset(GOT_TYPE_STANDARD));
1662 got_offset = gsym->got_offset(GOT_TYPE_STANDARD);
1663 }
1664 else
1665 {
1666 unsigned int r_sym = elfcpp::elf_r_sym<size>(rela.get_r_info());
1667 gold_assert(object->local_has_got_offset(r_sym, GOT_TYPE_STANDARD));
1668 got_offset = object->local_got_offset(r_sym, GOT_TYPE_STANDARD);
1669 }
42cacb20
DE		 1670 break;
1671
1672 // R_PPC_PLTREL24 is rather special. If non-zero,
1673 // the addend specifies the GOT pointer offset within .got2.
1674 case elfcpp::R_PPC_PLTREL24:
1675 if (addend >= 32768)
1676 {
1677 Output_data_space* got2;
1678 got2 = target->got2_section();
1679 got2_offset = got2->offset();
1680 addend += got2_offset;
1681 }
42cacb20
DE		 1682 break;
1683
1684 default:
1685 break;
1686 }
1687
1688 switch (r_type)
1689 {
1690 case elfcpp::R_POWERPC_NONE:
1691 case elfcpp::R_POWERPC_GNU_VTINHERIT:
1692 case elfcpp::R_POWERPC_GNU_VTENTRY:
1693 break;
1694
1695 case elfcpp::R_POWERPC_REL32:
1696 Reloc::rel32(view, object, psymval, addend, address);
1697 break;
1698
1699 case elfcpp::R_POWERPC_REL24:
1700 Reloc::rel24(view, object, psymval, addend, address);
1701 break;
1702
1703 case elfcpp::R_POWERPC_REL14:
1704 Reloc::rel14(view, object, psymval, addend, address);
1705 break;
1706
1707 case elfcpp::R_PPC_PLTREL24:
1708 Reloc::rel24(view, object, psymval, addend, address);
1709 break;
1710
1711 case elfcpp::R_PPC_LOCAL24PC:
1712 Reloc::rel24(view, object, psymval, addend, address);
1713 break;
1714
1715 case elfcpp::R_PPC64_ADDR64:
1716 if (!parameters->options().output_is_position_independent())
1717 Relocate_functions<size, big_endian>::rela64(view, object,
1718 psymval, addend);
1719 break;
1720
1721 case elfcpp::R_POWERPC_ADDR32:
1722 if (!parameters->options().output_is_position_independent())
1723 Relocate_functions<size, big_endian>::rela32(view, object,
1724 psymval, addend);
1725 break;
1726
1727 case elfcpp::R_POWERPC_ADDR16_LO:
1728 Reloc::addr16_lo(view, object, psymval, addend);
1729 break;
1730
1731 case elfcpp::R_POWERPC_ADDR16_HI:
1732 Reloc::addr16_hi(view, object, psymval, addend);
1733 break;
1734
1735 case elfcpp::R_POWERPC_ADDR16_HA:
1736 Reloc::addr16_ha(view, object, psymval, addend);
1737 break;
1738
1739 case elfcpp::R_PPC_REL16_LO:
1740 Reloc::rel16_lo(view, object, psymval, addend, address);
1741 break;
1742
1743 case elfcpp::R_PPC_REL16_HI:
1744 Reloc::rel16_lo(view, object, psymval, addend, address);
1745 break;
1746
1747 case elfcpp::R_PPC_REL16_HA:
83d22aa8 1748 Reloc::rel16_ha(view, object, psymval, addend, address);
42cacb20
DE		 1749 break;
1750
1751 case elfcpp::R_POWERPC_GOT16:
1752 Reloc::addr16(view, got_offset, addend);
1753 break;
1754
1755 case elfcpp::R_POWERPC_GOT16_LO:
1756 Reloc::addr16_lo(view, got_offset, addend);
1757 break;
1758
1759 case elfcpp::R_POWERPC_GOT16_HI:
1760 Reloc::addr16_hi(view, got_offset, addend);
1761 break;
1762
1763 case elfcpp::R_POWERPC_GOT16_HA:
1764 Reloc::addr16_ha(view, got_offset, addend);
1765 break;
1766
1767 case elfcpp::R_PPC64_TOC16:
1768 Reloc::addr16(view, got_offset, addend);
1769 break;
1770
1771 case elfcpp::R_PPC64_TOC16_LO:
1772 Reloc::addr16_lo(view, got_offset, addend);
1773 break;
1774
1775 case elfcpp::R_PPC64_TOC16_HI:
1776 Reloc::addr16_hi(view, got_offset, addend);
1777 break;
1778
1779 case elfcpp::R_PPC64_TOC16_HA:
1780 Reloc::addr16_ha(view, got_offset, addend);
1781 break;
1782
1783 case elfcpp::R_PPC64_TOC16_DS:
1784 case elfcpp::R_PPC64_TOC16_LO_DS:
1785 Reloc::addr16_ds(view, got_offset, addend);
1786 break;
1787
1788 case elfcpp::R_PPC64_TOC:
1789 {
1790 elfcpp::Elf_types<64>::Elf_Addr value;
1791 value = target->toc_section()->address() + toc_base_offset;
1792 Relocate_functions<64, false>::rela64(view, value, addend);
1793 }
1794 break;
1795
1796 case elfcpp::R_POWERPC_COPY:
1797 case elfcpp::R_POWERPC_GLOB_DAT:
1798 case elfcpp::R_POWERPC_JMP_SLOT:
1799 case elfcpp::R_POWERPC_RELATIVE:
1800 // This is an outstanding tls reloc, which is unexpected when
1801 // linking.
1802 case elfcpp::R_POWERPC_DTPMOD:
1803 gold_error_at_location(relinfo, relnum, rela.get_r_offset(),
1804 _("unexpected reloc %u in object file"),
1805 r_type);
1806 break;
1807
1808 default:
1809 gold_error_at_location(relinfo, relnum, rela.get_r_offset(),
1810 _("unsupported reloc %u"),
1811 r_type);
1812 break;
1813 }
1814
1815 return true;
1816}
1817
1818// Perform a TLS relocation.
1819
1820template<int size, bool big_endian>
1821inline void
1822Target_powerpc<size, big_endian>::Relocate::relocate_tls(
1823 const Relocate_info<size, big_endian>* relinfo,
1824 Target_powerpc<size, big_endian>* target,
1825 size_t relnum,
1826 const elfcpp::Rela<size, big_endian>& rela,
1827 unsigned int r_type,
1828 const Sized_symbol<size>* gsym,
1829 const Symbol_value<size>* psymval,
1830 unsigned char* view,
1831 typename elfcpp::Elf_types<size>::Elf_Addr address,
1832 section_size_type)
1833{
1834 Output_segment* tls_segment = relinfo->layout->tls_segment();
1835 typedef Powerpc_relocate_functions<size, big_endian> Reloc;
1836 const Sized_relobj<size, big_endian>* object = relinfo->object;
1837
1838 const elfcpp::Elf_Xword addend = rela.get_r_addend();
1839 typename elfcpp::Elf_types<size>::Elf_Addr value = psymval->value(object, 0);
1840
1841 const bool is_final =
1842 (gsym == NULL
1843 ? !parameters->options().output_is_position_independent()
1844 : gsym->final_value_is_known());
1845 const tls::Tls_optimization optimized_type
1846 = optimize_tls_reloc(is_final, r_type);
1847
1848 switch (r_type)
1849 {
1850 // XXX
1851 }
1852}
1853
1854// Relocate section data.
1855
1856template<int size, bool big_endian>
1857void
1858Target_powerpc<size, big_endian>::relocate_section(
1859 const Relocate_info<size, big_endian>* relinfo,
1860 unsigned int sh_type,
1861 const unsigned char* prelocs,
1862 size_t reloc_count,
1863 Output_section* output_section,
1864 bool needs_special_offset_handling,
1865 unsigned char* view,
1866 typename elfcpp::Elf_types<size>::Elf_Addr address,
364c7fa5
ILT		 1867 section_size_type view_size,
1868 const Reloc_symbol_changes* reloc_symbol_changes)
42cacb20
DE		 1869{
1870 typedef Target_powerpc<size, big_endian> Powerpc;
1871 typedef typename Target_powerpc<size, big_endian>::Relocate Powerpc_relocate;
1872
1873 gold_assert(sh_type == elfcpp::SHT_RELA);
1874
1875 gold::relocate_section<size, big_endian, Powerpc, elfcpp::SHT_RELA,
1876 Powerpc_relocate>(
1877 relinfo,
1878 this,
1879 prelocs,
1880 reloc_count,
1881 output_section,
1882 needs_special_offset_handling,
1883 view,
1884 address,
364c7fa5
ILT		 1885 view_size,
1886 reloc_symbol_changes);
42cacb20
DE		 1887}
1888
1889// Return the size of a relocation while scanning during a relocatable
1890// link.
1891
1892template<int size, bool big_endian>
1893unsigned int
1894Target_powerpc<size, big_endian>::Relocatable_size_for_reloc::get_size_for_reloc(
1895 unsigned int,
1896 Relobj*)
1897{
1898 // We are always SHT_RELA, so we should never get here.
1899 gold_unreachable();
1900 return 0;
1901}
1902
1903// Scan the relocs during a relocatable link.
1904
1905template<int size, bool big_endian>
1906void
1907Target_powerpc<size, big_endian>::scan_relocatable_relocs(
42cacb20
DE		 1908 Symbol_table* symtab,
1909 Layout* layout,
1910 Sized_relobj<size, big_endian>* object,
1911 unsigned int data_shndx,
1912 unsigned int sh_type,
1913 const unsigned char* prelocs,
1914 size_t reloc_count,
1915 Output_section* output_section,
1916 bool needs_special_offset_handling,
1917 size_t local_symbol_count,
1918 const unsigned char* plocal_symbols,
1919 Relocatable_relocs* rr)
1920{
1921 gold_assert(sh_type == elfcpp::SHT_RELA);
1922
1923 typedef gold::Default_scan_relocatable_relocs<elfcpp::SHT_RELA,
1924 Relocatable_size_for_reloc> Scan_relocatable_relocs;
1925
1926 gold::scan_relocatable_relocs<size, big_endian, elfcpp::SHT_RELA,
1927 Scan_relocatable_relocs>(
42cacb20
DE		 1928 symtab,
1929 layout,
1930 object,
1931 data_shndx,
1932 prelocs,
1933 reloc_count,
1934 output_section,
1935 needs_special_offset_handling,
1936 local_symbol_count,
1937 plocal_symbols,
1938 rr);
1939}
1940
1941// Relocate a section during a relocatable link.
1942
1943template<int size, bool big_endian>
1944void
1945Target_powerpc<size, big_endian>::relocate_for_relocatable(
1946 const Relocate_info<size, big_endian>* relinfo,
1947 unsigned int sh_type,
1948 const unsigned char* prelocs,
1949 size_t reloc_count,
1950 Output_section* output_section,
1951 off_t offset_in_output_section,
1952 const Relocatable_relocs* rr,
1953 unsigned char* view,
1954 typename elfcpp::Elf_types<size>::Elf_Addr view_address,
1955 section_size_type view_size,
1956 unsigned char* reloc_view,
1957 section_size_type reloc_view_size)
1958{
1959 gold_assert(sh_type == elfcpp::SHT_RELA);
1960
1961 gold::relocate_for_relocatable<size, big_endian, elfcpp::SHT_RELA>(
1962 relinfo,
1963 prelocs,
1964 reloc_count,
1965 output_section,
1966 offset_in_output_section,
1967 rr,
1968 view,
1969 view_address,
1970 view_size,
1971 reloc_view,
1972 reloc_view_size);
1973}
1974
1975// Return the value to use for a dynamic which requires special
1976// treatment. This is how we support equality comparisons of function
1977// pointers across shared library boundaries, as described in the
1978// processor specific ABI supplement.
1979
1980template<int size, bool big_endian>
1981uint64_t
1982Target_powerpc<size, big_endian>::do_dynsym_value(const Symbol* gsym) const
1983{
1984 gold_assert(gsym->is_from_dynobj() && gsym->has_plt_offset());
1985 return this->plt_section()->address() + gsym->plt_offset();
1986}
1987
1988// The selector for powerpc object files.
1989
1990template<int size, bool big_endian>
1991class Target_selector_powerpc : public Target_selector
1992{
1993public:
1994 Target_selector_powerpc()
1995 : Target_selector(elfcpp::EM_NONE, size, big_endian,
1996 (size == 64 ?
1997 (big_endian ? "elf64-powerpc" : "elf64-powerpcle") :
1998 (big_endian ? "elf32-powerpc" : "elf32-powerpcle")))
1999 { }
2000
2ea97941 2001 Target* do_recognize(int machine, int, int)
42cacb20
DE		 2002 {
2003 switch (size)
2004 {
2005 case 64:
2ea97941 2006 if (machine != elfcpp::EM_PPC64)
42cacb20
DE		 2007 return NULL;
2008 break;
2009
2010 case 32:
2ea97941 2011 if (machine != elfcpp::EM_PPC)
42cacb20
DE		 2012 return NULL;
2013 break;
2014
2015 default:
2016 return NULL;
2017 }
2018
7f055c20 2019 return this->instantiate_target();
42cacb20
DE		 2020 }
2021
2022 Target* do_instantiate_target()
7f055c20 2023 { return new Target_powerpc<size, big_endian>(); }
42cacb20
DE		 2024};
2025
2026Target_selector_powerpc<32, true> target_selector_ppc32;
2027Target_selector_powerpc<32, false> target_selector_ppc32le;
2028Target_selector_powerpc<64, true> target_selector_ppc64;
2029Target_selector_powerpc<64, false> target_selector_ppc64le;
2030
2031} // End anonymous namespace.
GDB Binutils - Deliverables
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