1 // mips.cc -- mips target support for gold.
3 // Copyright (C) 2011-2017 Free Software Foundation, Inc.
4 // Written by Sasa Stankovic <sasa.stankovic@imgtec.com>
5 // and Aleksandar Simeonov <aleksandar.simeonov@rt-rk.com>.
6 // This file contains borrowed and adapted code from bfd/elfxx-mips.c.
8 // This file is part of gold.
10 // This program is free software; you can redistribute it and/or modify
11 // it under the terms of the GNU General Public License as published by
12 // the Free Software Foundation; either version 3 of the License, or
13 // (at your option) any later version.
15 // This program is distributed in the hope that it will be useful,
16 // but WITHOUT ANY WARRANTY; without even the implied warranty of
17 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
18 // GNU General Public License for more details.
20 // You should have received a copy of the GNU General Public License
21 // along with this program; if not, write to the Free Software
22 // Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston,
23 // MA 02110-1301, USA.
33 #include "parameters.h"
40 #include "copy-relocs.h"
42 #include "target-reloc.h"
43 #include "target-select.h"
47 #include "attributes.h"
54 template<int size
, bool big_endian
>
55 class Mips_output_data_plt
;
57 template<int size
, bool big_endian
>
58 class Mips_output_data_got
;
60 template<int size
, bool big_endian
>
63 template<int size
, bool big_endian
>
64 class Mips_output_section_reginfo
;
66 template<int size
, bool big_endian
>
67 class Mips_output_data_la25_stub
;
69 template<int size
, bool big_endian
>
70 class Mips_output_data_mips_stubs
;
75 template<int size
, bool big_endian
>
78 template<int size
, bool big_endian
>
81 class Mips16_stub_section_base
;
83 template<int size
, bool big_endian
>
84 class Mips16_stub_section
;
86 // The ABI says that every symbol used by dynamic relocations must have
87 // a global GOT entry. Among other things, this provides the dynamic
88 // linker with a free, directly-indexed cache. The GOT can therefore
89 // contain symbols that are not referenced by GOT relocations themselves
90 // (in other words, it may have symbols that are not referenced by things
91 // like R_MIPS_GOT16 and R_MIPS_GOT_PAGE).
93 // GOT relocations are less likely to overflow if we put the associated
94 // GOT entries towards the beginning. We therefore divide the global
95 // GOT entries into two areas: "normal" and "reloc-only". Entries in
96 // the first area can be used for both dynamic relocations and GP-relative
97 // accesses, while those in the "reloc-only" area are for dynamic
100 // These GGA_* ("Global GOT Area") values are organised so that lower
101 // values are more general than higher values. Also, non-GGA_NONE
102 // values are ordered by the position of the area in the GOT.
111 // The types of GOT entries needed for this platform.
112 // These values are exposed to the ABI in an incremental link.
113 // Do not renumber existing values without changing the version
114 // number of the .gnu_incremental_inputs section.
117 GOT_TYPE_STANDARD
= 0, // GOT entry for a regular symbol
118 GOT_TYPE_TLS_OFFSET
= 1, // GOT entry for TLS offset
119 GOT_TYPE_TLS_PAIR
= 2, // GOT entry for TLS module/offset pair
121 // GOT entries for multi-GOT. We support up to 1024 GOTs in multi-GOT links.
122 GOT_TYPE_STANDARD_MULTIGOT
= 3,
123 GOT_TYPE_TLS_OFFSET_MULTIGOT
= GOT_TYPE_STANDARD_MULTIGOT
+ 1024,
124 GOT_TYPE_TLS_PAIR_MULTIGOT
= GOT_TYPE_TLS_OFFSET_MULTIGOT
+ 1024
127 // TLS type of GOT entry.
136 // Values found in the r_ssym field of a relocation entry.
137 enum Special_relocation_symbol
139 RSS_UNDEF
= 0, // None - value is zero.
140 RSS_GP
= 1, // Value of GP.
141 RSS_GP0
= 2, // Value of GP in object being relocated.
142 RSS_LOC
= 3 // Address of location being relocated.
145 // Whether the section is readonly.
147 is_readonly_section(Output_section
* output_section
)
149 elfcpp::Elf_Xword section_flags
= output_section
->flags();
150 elfcpp::Elf_Word section_type
= output_section
->type();
152 if (section_type
== elfcpp::SHT_NOBITS
)
155 if (section_flags
& elfcpp::SHF_WRITE
)
161 // Return TRUE if a relocation of type R_TYPE from OBJECT might
162 // require an la25 stub. See also local_pic_function, which determines
163 // whether the destination function ever requires a stub.
164 template<int size
, bool big_endian
>
166 relocation_needs_la25_stub(Mips_relobj
<size
, big_endian
>* object
,
167 unsigned int r_type
, bool target_is_16_bit_code
)
169 // We specifically ignore branches and jumps from EF_PIC objects,
170 // where the onus is on the compiler or programmer to perform any
171 // necessary initialization of $25. Sometimes such initialization
172 // is unnecessary; for example, -mno-shared functions do not use
173 // the incoming value of $25, and may therefore be called directly.
174 if (object
->is_pic())
179 case elfcpp::R_MIPS_26
:
180 case elfcpp::R_MIPS_PC16
:
181 case elfcpp::R_MIPS_PC21_S2
:
182 case elfcpp::R_MIPS_PC26_S2
:
183 case elfcpp::R_MICROMIPS_26_S1
:
184 case elfcpp::R_MICROMIPS_PC7_S1
:
185 case elfcpp::R_MICROMIPS_PC10_S1
:
186 case elfcpp::R_MICROMIPS_PC16_S1
:
187 case elfcpp::R_MICROMIPS_PC23_S2
:
190 case elfcpp::R_MIPS16_26
:
191 return !target_is_16_bit_code
;
198 // Return true if SYM is a locally-defined PIC function, in the sense
199 // that it or its fn_stub might need $25 to be valid on entry.
200 // Note that MIPS16 functions set up $gp using PC-relative instructions,
201 // so they themselves never need $25 to be valid. Only non-MIPS16
202 // entry points are of interest here.
203 template<int size
, bool big_endian
>
205 local_pic_function(Mips_symbol
<size
>* sym
)
207 bool def_regular
= (sym
->source() == Symbol::FROM_OBJECT
208 && !sym
->object()->is_dynamic()
209 && !sym
->is_undefined());
211 if (sym
->is_defined() && def_regular
)
213 Mips_relobj
<size
, big_endian
>* object
=
214 static_cast<Mips_relobj
<size
, big_endian
>*>(sym
->object());
216 if ((object
->is_pic() || sym
->is_pic())
217 && (!sym
->is_mips16()
218 || (sym
->has_mips16_fn_stub() && sym
->need_fn_stub())))
225 hi16_reloc(int r_type
)
227 return (r_type
== elfcpp::R_MIPS_HI16
228 || r_type
== elfcpp::R_MIPS16_HI16
229 || r_type
== elfcpp::R_MICROMIPS_HI16
230 || r_type
== elfcpp::R_MIPS_PCHI16
);
234 lo16_reloc(int r_type
)
236 return (r_type
== elfcpp::R_MIPS_LO16
237 || r_type
== elfcpp::R_MIPS16_LO16
238 || r_type
== elfcpp::R_MICROMIPS_LO16
239 || r_type
== elfcpp::R_MIPS_PCLO16
);
243 got16_reloc(unsigned int r_type
)
245 return (r_type
== elfcpp::R_MIPS_GOT16
246 || r_type
== elfcpp::R_MIPS16_GOT16
247 || r_type
== elfcpp::R_MICROMIPS_GOT16
);
251 call_lo16_reloc(unsigned int r_type
)
253 return (r_type
== elfcpp::R_MIPS_CALL_LO16
254 || r_type
== elfcpp::R_MICROMIPS_CALL_LO16
);
258 got_lo16_reloc(unsigned int r_type
)
260 return (r_type
== elfcpp::R_MIPS_GOT_LO16
261 || r_type
== elfcpp::R_MICROMIPS_GOT_LO16
);
265 eh_reloc(unsigned int r_type
)
267 return (r_type
== elfcpp::R_MIPS_EH
);
271 got_disp_reloc(unsigned int r_type
)
273 return (r_type
== elfcpp::R_MIPS_GOT_DISP
274 || r_type
== elfcpp::R_MICROMIPS_GOT_DISP
);
278 got_page_reloc(unsigned int r_type
)
280 return (r_type
== elfcpp::R_MIPS_GOT_PAGE
281 || r_type
== elfcpp::R_MICROMIPS_GOT_PAGE
);
285 tls_gd_reloc(unsigned int r_type
)
287 return (r_type
== elfcpp::R_MIPS_TLS_GD
288 || r_type
== elfcpp::R_MIPS16_TLS_GD
289 || r_type
== elfcpp::R_MICROMIPS_TLS_GD
);
293 tls_gottprel_reloc(unsigned int r_type
)
295 return (r_type
== elfcpp::R_MIPS_TLS_GOTTPREL
296 || r_type
== elfcpp::R_MIPS16_TLS_GOTTPREL
297 || r_type
== elfcpp::R_MICROMIPS_TLS_GOTTPREL
);
301 tls_ldm_reloc(unsigned int r_type
)
303 return (r_type
== elfcpp::R_MIPS_TLS_LDM
304 || r_type
== elfcpp::R_MIPS16_TLS_LDM
305 || r_type
== elfcpp::R_MICROMIPS_TLS_LDM
);
309 mips16_call_reloc(unsigned int r_type
)
311 return (r_type
== elfcpp::R_MIPS16_26
312 || r_type
== elfcpp::R_MIPS16_CALL16
);
316 jal_reloc(unsigned int r_type
)
318 return (r_type
== elfcpp::R_MIPS_26
319 || r_type
== elfcpp::R_MIPS16_26
320 || r_type
== elfcpp::R_MICROMIPS_26_S1
);
324 micromips_branch_reloc(unsigned int r_type
)
326 return (r_type
== elfcpp::R_MICROMIPS_26_S1
327 || r_type
== elfcpp::R_MICROMIPS_PC16_S1
328 || r_type
== elfcpp::R_MICROMIPS_PC10_S1
329 || r_type
== elfcpp::R_MICROMIPS_PC7_S1
);
332 // Check if R_TYPE is a MIPS16 reloc.
334 mips16_reloc(unsigned int r_type
)
338 case elfcpp::R_MIPS16_26
:
339 case elfcpp::R_MIPS16_GPREL
:
340 case elfcpp::R_MIPS16_GOT16
:
341 case elfcpp::R_MIPS16_CALL16
:
342 case elfcpp::R_MIPS16_HI16
:
343 case elfcpp::R_MIPS16_LO16
:
344 case elfcpp::R_MIPS16_TLS_GD
:
345 case elfcpp::R_MIPS16_TLS_LDM
:
346 case elfcpp::R_MIPS16_TLS_DTPREL_HI16
:
347 case elfcpp::R_MIPS16_TLS_DTPREL_LO16
:
348 case elfcpp::R_MIPS16_TLS_GOTTPREL
:
349 case elfcpp::R_MIPS16_TLS_TPREL_HI16
:
350 case elfcpp::R_MIPS16_TLS_TPREL_LO16
:
358 // Check if R_TYPE is a microMIPS reloc.
360 micromips_reloc(unsigned int r_type
)
364 case elfcpp::R_MICROMIPS_26_S1
:
365 case elfcpp::R_MICROMIPS_HI16
:
366 case elfcpp::R_MICROMIPS_LO16
:
367 case elfcpp::R_MICROMIPS_GPREL16
:
368 case elfcpp::R_MICROMIPS_LITERAL
:
369 case elfcpp::R_MICROMIPS_GOT16
:
370 case elfcpp::R_MICROMIPS_PC7_S1
:
371 case elfcpp::R_MICROMIPS_PC10_S1
:
372 case elfcpp::R_MICROMIPS_PC16_S1
:
373 case elfcpp::R_MICROMIPS_CALL16
:
374 case elfcpp::R_MICROMIPS_GOT_DISP
:
375 case elfcpp::R_MICROMIPS_GOT_PAGE
:
376 case elfcpp::R_MICROMIPS_GOT_OFST
:
377 case elfcpp::R_MICROMIPS_GOT_HI16
:
378 case elfcpp::R_MICROMIPS_GOT_LO16
:
379 case elfcpp::R_MICROMIPS_SUB
:
380 case elfcpp::R_MICROMIPS_HIGHER
:
381 case elfcpp::R_MICROMIPS_HIGHEST
:
382 case elfcpp::R_MICROMIPS_CALL_HI16
:
383 case elfcpp::R_MICROMIPS_CALL_LO16
:
384 case elfcpp::R_MICROMIPS_SCN_DISP
:
385 case elfcpp::R_MICROMIPS_JALR
:
386 case elfcpp::R_MICROMIPS_HI0_LO16
:
387 case elfcpp::R_MICROMIPS_TLS_GD
:
388 case elfcpp::R_MICROMIPS_TLS_LDM
:
389 case elfcpp::R_MICROMIPS_TLS_DTPREL_HI16
:
390 case elfcpp::R_MICROMIPS_TLS_DTPREL_LO16
:
391 case elfcpp::R_MICROMIPS_TLS_GOTTPREL
:
392 case elfcpp::R_MICROMIPS_TLS_TPREL_HI16
:
393 case elfcpp::R_MICROMIPS_TLS_TPREL_LO16
:
394 case elfcpp::R_MICROMIPS_GPREL7_S2
:
395 case elfcpp::R_MICROMIPS_PC23_S2
:
404 is_matching_lo16_reloc(unsigned int high_reloc
, unsigned int lo16_reloc
)
408 case elfcpp::R_MIPS_HI16
:
409 case elfcpp::R_MIPS_GOT16
:
410 return lo16_reloc
== elfcpp::R_MIPS_LO16
;
411 case elfcpp::R_MIPS_PCHI16
:
412 return lo16_reloc
== elfcpp::R_MIPS_PCLO16
;
413 case elfcpp::R_MIPS16_HI16
:
414 case elfcpp::R_MIPS16_GOT16
:
415 return lo16_reloc
== elfcpp::R_MIPS16_LO16
;
416 case elfcpp::R_MICROMIPS_HI16
:
417 case elfcpp::R_MICROMIPS_GOT16
:
418 return lo16_reloc
== elfcpp::R_MICROMIPS_LO16
;
424 // This class is used to hold information about one GOT entry.
425 // There are three types of entry:
427 // (1) a SYMBOL + OFFSET address, where SYMBOL is local to an input object
428 // (object != NULL, symndx >= 0, tls_type != GOT_TLS_LDM)
429 // (2) a SYMBOL address, where SYMBOL is not local to an input object
430 // (sym != NULL, symndx == -1)
431 // (3) a TLS LDM slot (there's only one of these per GOT.)
432 // (object != NULL, symndx == 0, tls_type == GOT_TLS_LDM)
434 template<int size
, bool big_endian
>
437 typedef typename
elfcpp::Elf_types
<size
>::Elf_Addr Mips_address
;
440 Mips_got_entry(Mips_relobj
<size
, big_endian
>* object
, unsigned int symndx
,
441 Mips_address addend
, unsigned char tls_type
,
442 unsigned int shndx
, bool is_section_symbol
)
443 : addend_(addend
), symndx_(symndx
), tls_type_(tls_type
),
444 is_section_symbol_(is_section_symbol
), shndx_(shndx
)
445 { this->d
.object
= object
; }
447 Mips_got_entry(Mips_symbol
<size
>* sym
, unsigned char tls_type
)
448 : addend_(0), symndx_(-1U), tls_type_(tls_type
),
449 is_section_symbol_(false), shndx_(-1U)
450 { this->d
.sym
= sym
; }
452 // Return whether this entry is for a local symbol.
454 is_for_local_symbol() const
455 { return this->symndx_
!= -1U; }
457 // Return whether this entry is for a global symbol.
459 is_for_global_symbol() const
460 { return this->symndx_
== -1U; }
462 // Return the hash of this entry.
466 if (this->tls_type_
== GOT_TLS_LDM
)
467 return this->symndx_
+ (1 << 18);
469 size_t name_hash_value
= gold::string_hash
<char>(
470 (this->symndx_
!= -1U)
471 ? this->d
.object
->name().c_str()
472 : this->d
.sym
->name());
473 size_t addend
= this->addend_
;
474 return name_hash_value
^ this->symndx_
^ addend
;
477 // Return whether this entry is equal to OTHER.
479 equals(Mips_got_entry
<size
, big_endian
>* other
) const
481 if (this->tls_type_
== GOT_TLS_LDM
)
484 return ((this->tls_type_
== other
->tls_type_
)
485 && (this->symndx_
== other
->symndx_
)
486 && ((this->symndx_
!= -1U)
487 ? (this->d
.object
== other
->d
.object
)
488 : (this->d
.sym
== other
->d
.sym
))
489 && (this->addend_
== other
->addend_
));
492 // Return input object that needs this GOT entry.
493 Mips_relobj
<size
, big_endian
>*
496 gold_assert(this->symndx_
!= -1U);
497 return this->d
.object
;
500 // Return local symbol index for local GOT entries.
504 gold_assert(this->symndx_
!= -1U);
505 return this->symndx_
;
508 // Return the relocation addend for local GOT entries.
511 { return this->addend_
; }
513 // Return global symbol for global GOT entries.
517 gold_assert(this->symndx_
== -1U);
521 // Return whether this is a TLS GOT entry.
524 { return this->tls_type_
!= GOT_TLS_NONE
; }
526 // Return TLS type of this GOT entry.
529 { return this->tls_type_
; }
531 // Return section index of the local symbol for local GOT entries.
534 { return this->shndx_
; }
536 // Return whether this is a STT_SECTION symbol.
538 is_section_symbol() const
539 { return this->is_section_symbol_
; }
543 Mips_address addend_
;
545 // The index of the symbol if we have a local symbol; -1 otherwise.
546 unsigned int symndx_
;
550 // The input object for local symbols that needs the GOT entry.
551 Mips_relobj
<size
, big_endian
>* object
;
552 // If symndx == -1, the global symbol corresponding to this GOT entry. The
553 // symbol's entry is in the local area if mips_sym->global_got_area is
554 // GGA_NONE, otherwise it is in the global area.
555 Mips_symbol
<size
>* sym
;
558 // The TLS type of this GOT entry. An LDM GOT entry will be a local
559 // symbol entry with r_symndx == 0.
560 unsigned char tls_type_
;
562 // Whether this is a STT_SECTION symbol.
563 bool is_section_symbol_
;
565 // For local GOT entries, section index of the local symbol.
569 // Hash for Mips_got_entry.
571 template<int size
, bool big_endian
>
572 class Mips_got_entry_hash
576 operator()(Mips_got_entry
<size
, big_endian
>* entry
) const
577 { return entry
->hash(); }
580 // Equality for Mips_got_entry.
582 template<int size
, bool big_endian
>
583 class Mips_got_entry_eq
587 operator()(Mips_got_entry
<size
, big_endian
>* e1
,
588 Mips_got_entry
<size
, big_endian
>* e2
) const
589 { return e1
->equals(e2
); }
592 // Hash for Mips_symbol.
595 class Mips_symbol_hash
599 operator()(Mips_symbol
<size
>* sym
) const
600 { return sym
->hash(); }
603 // Got_page_range. This class describes a range of addends: [MIN_ADDEND,
604 // MAX_ADDEND]. The instances form a non-overlapping list that is sorted by
605 // increasing MIN_ADDEND.
607 struct Got_page_range
610 : next(NULL
), min_addend(0), max_addend(0)
613 Got_page_range
* next
;
617 // Return the maximum number of GOT page entries required.
620 { return (this->max_addend
- this->min_addend
+ 0x1ffff) >> 16; }
623 // Got_page_entry. This class describes the range of addends that are applied
624 // to page relocations against a given symbol.
626 struct Got_page_entry
629 : object(NULL
), symndx(-1U), ranges(NULL
), num_pages(0)
632 Got_page_entry(Object
* object_
, unsigned int symndx_
)
633 : object(object_
), symndx(symndx_
), ranges(NULL
), num_pages(0)
636 // The input object that needs the GOT page entry.
638 // The index of the symbol, as stored in the relocation r_info.
640 // The ranges for this page entry.
641 Got_page_range
* ranges
;
642 // The maximum number of page entries needed for RANGES.
643 unsigned int num_pages
;
646 // Hash for Got_page_entry.
648 struct Got_page_entry_hash
651 operator()(Got_page_entry
* entry
) const
652 { return reinterpret_cast<uintptr_t>(entry
->object
) + entry
->symndx
; }
655 // Equality for Got_page_entry.
657 struct Got_page_entry_eq
660 operator()(Got_page_entry
* entry1
, Got_page_entry
* entry2
) const
662 return entry1
->object
== entry2
->object
&& entry1
->symndx
== entry2
->symndx
;
666 // This class is used to hold .got information when linking.
668 template<int size
, bool big_endian
>
671 typedef typename
elfcpp::Elf_types
<size
>::Elf_Addr Mips_address
;
672 typedef Output_data_reloc
<elfcpp::SHT_REL
, true, size
, big_endian
>
674 typedef Unordered_map
<unsigned int, unsigned int> Got_page_offsets
;
676 // Unordered set of GOT entries.
677 typedef Unordered_set
<Mips_got_entry
<size
, big_endian
>*,
678 Mips_got_entry_hash
<size
, big_endian
>,
679 Mips_got_entry_eq
<size
, big_endian
> > Got_entry_set
;
681 // Unordered set of GOT page entries.
682 typedef Unordered_set
<Got_page_entry
*,
683 Got_page_entry_hash
, Got_page_entry_eq
> Got_page_entry_set
;
685 // Unordered set of global GOT entries.
686 typedef Unordered_set
<Mips_symbol
<size
>*, Mips_symbol_hash
<size
> >
687 Global_got_entry_set
;
691 : local_gotno_(0), page_gotno_(0), global_gotno_(0), reloc_only_gotno_(0),
692 tls_gotno_(0), tls_ldm_offset_(-1U), global_got_symbols_(),
693 got_entries_(), got_page_entries_(), got_page_offset_start_(0),
694 got_page_offset_next_(0), got_page_offsets_(), next_(NULL
), index_(-1U),
698 // Reserve GOT entry for a GOT relocation of type R_TYPE against symbol
699 // SYMNDX + ADDEND, where SYMNDX is a local symbol in section SHNDX in OBJECT.
701 record_local_got_symbol(Mips_relobj
<size
, big_endian
>* object
,
702 unsigned int symndx
, Mips_address addend
,
703 unsigned int r_type
, unsigned int shndx
,
704 bool is_section_symbol
);
706 // Reserve GOT entry for a GOT relocation of type R_TYPE against MIPS_SYM,
707 // in OBJECT. FOR_CALL is true if the caller is only interested in
708 // using the GOT entry for calls. DYN_RELOC is true if R_TYPE is a dynamic
711 record_global_got_symbol(Mips_symbol
<size
>* mips_sym
,
712 Mips_relobj
<size
, big_endian
>* object
,
713 unsigned int r_type
, bool dyn_reloc
, bool for_call
);
715 // Add ENTRY to master GOT and to OBJECT's GOT.
717 record_got_entry(Mips_got_entry
<size
, big_endian
>* entry
,
718 Mips_relobj
<size
, big_endian
>* object
);
720 // Record that OBJECT has a page relocation against symbol SYMNDX and
721 // that ADDEND is the addend for that relocation.
723 record_got_page_entry(Mips_relobj
<size
, big_endian
>* object
,
724 unsigned int symndx
, int addend
);
726 // Create all entries that should be in the local part of the GOT.
728 add_local_entries(Target_mips
<size
, big_endian
>* target
, Layout
* layout
);
730 // Create GOT page entries.
732 add_page_entries(Target_mips
<size
, big_endian
>* target
, Layout
* layout
);
734 // Create global GOT entries, both GGA_NORMAL and GGA_RELOC_ONLY.
736 add_global_entries(Target_mips
<size
, big_endian
>* target
, Layout
* layout
,
737 unsigned int non_reloc_only_global_gotno
);
739 // Create global GOT entries that should be in the GGA_RELOC_ONLY area.
741 add_reloc_only_entries(Mips_output_data_got
<size
, big_endian
>* got
);
743 // Create TLS GOT entries.
745 add_tls_entries(Target_mips
<size
, big_endian
>* target
, Layout
* layout
);
747 // Decide whether the symbol needs an entry in the global part of the primary
748 // GOT, setting global_got_area accordingly. Count the number of global
749 // symbols that are in the primary GOT only because they have dynamic
750 // relocations R_MIPS_REL32 against them (reloc_only_gotno).
752 count_got_symbols(Symbol_table
* symtab
);
754 // Return the offset of GOT page entry for VALUE.
756 get_got_page_offset(Mips_address value
,
757 Mips_output_data_got
<size
, big_endian
>* got
);
759 // Count the number of GOT entries required.
763 // Count the number of GOT entries required by ENTRY. Accumulate the result.
765 count_got_entry(Mips_got_entry
<size
, big_endian
>* entry
);
767 // Add FROM's GOT entries.
769 add_got_entries(Mips_got_info
<size
, big_endian
>* from
);
771 // Add FROM's GOT page entries.
773 add_got_page_entries(Mips_got_info
<size
, big_endian
>* from
);
778 { return ((2 + this->local_gotno_
+ this->page_gotno_
+ this->global_gotno_
779 + this->tls_gotno_
) * size
/8);
782 // Return the number of local GOT entries.
785 { return this->local_gotno_
; }
787 // Return the maximum number of page GOT entries needed.
790 { return this->page_gotno_
; }
792 // Return the number of global GOT entries.
795 { return this->global_gotno_
; }
797 // Set the number of global GOT entries.
799 set_global_gotno(unsigned int global_gotno
)
800 { this->global_gotno_
= global_gotno
; }
802 // Return the number of GGA_RELOC_ONLY global GOT entries.
804 reloc_only_gotno() const
805 { return this->reloc_only_gotno_
; }
807 // Return the number of TLS GOT entries.
810 { return this->tls_gotno_
; }
812 // Return the GOT type for this GOT. Used for multi-GOT links only.
814 multigot_got_type(unsigned int got_type
) const
818 case GOT_TYPE_STANDARD
:
819 return GOT_TYPE_STANDARD_MULTIGOT
+ this->index_
;
820 case GOT_TYPE_TLS_OFFSET
:
821 return GOT_TYPE_TLS_OFFSET_MULTIGOT
+ this->index_
;
822 case GOT_TYPE_TLS_PAIR
:
823 return GOT_TYPE_TLS_PAIR_MULTIGOT
+ this->index_
;
829 // Remove lazy-binding stubs for global symbols in this GOT.
831 remove_lazy_stubs(Target_mips
<size
, big_endian
>* target
);
833 // Return offset of this GOT from the start of .got section.
836 { return this->offset_
; }
838 // Set offset of this GOT from the start of .got section.
840 set_offset(unsigned int offset
)
841 { this->offset_
= offset
; }
843 // Set index of this GOT in multi-GOT links.
845 set_index(unsigned int index
)
846 { this->index_
= index
; }
848 // Return next GOT in multi-GOT links.
849 Mips_got_info
<size
, big_endian
>*
851 { return this->next_
; }
853 // Set next GOT in multi-GOT links.
855 set_next(Mips_got_info
<size
, big_endian
>* next
)
856 { this->next_
= next
; }
858 // Return the offset of TLS LDM entry for this GOT.
860 tls_ldm_offset() const
861 { return this->tls_ldm_offset_
; }
863 // Set the offset of TLS LDM entry for this GOT.
865 set_tls_ldm_offset(unsigned int tls_ldm_offset
)
866 { this->tls_ldm_offset_
= tls_ldm_offset
; }
868 Global_got_entry_set
&
870 { return this->global_got_symbols_
; }
872 // Return the GOT_TLS_* type required by relocation type R_TYPE.
874 mips_elf_reloc_tls_type(unsigned int r_type
)
876 if (tls_gd_reloc(r_type
))
879 if (tls_ldm_reloc(r_type
))
882 if (tls_gottprel_reloc(r_type
))
888 // Return the number of GOT slots needed for GOT TLS type TYPE.
890 mips_tls_got_entries(unsigned int type
)
910 // The number of local GOT entries.
911 unsigned int local_gotno_
;
912 // The maximum number of page GOT entries needed.
913 unsigned int page_gotno_
;
914 // The number of global GOT entries.
915 unsigned int global_gotno_
;
916 // The number of global GOT entries that are in the GGA_RELOC_ONLY area.
917 unsigned int reloc_only_gotno_
;
918 // The number of TLS GOT entries.
919 unsigned int tls_gotno_
;
920 // The offset of TLS LDM entry for this GOT.
921 unsigned int tls_ldm_offset_
;
922 // All symbols that have global GOT entry.
923 Global_got_entry_set global_got_symbols_
;
924 // A hash table holding GOT entries.
925 Got_entry_set got_entries_
;
926 // A hash table of GOT page entries.
927 Got_page_entry_set got_page_entries_
;
928 // The offset of first GOT page entry for this GOT.
929 unsigned int got_page_offset_start_
;
930 // The offset of next available GOT page entry for this GOT.
931 unsigned int got_page_offset_next_
;
932 // A hash table that maps GOT page entry value to the GOT offset where
933 // the entry is located.
934 Got_page_offsets got_page_offsets_
;
935 // In multi-GOT links, a pointer to the next GOT.
936 Mips_got_info
<size
, big_endian
>* next_
;
937 // Index of this GOT in multi-GOT links.
939 // The offset of this GOT in multi-GOT links.
940 unsigned int offset_
;
943 // This is a helper class used during relocation scan. It records GOT16 addend.
945 template<int size
, bool big_endian
>
948 typedef typename
elfcpp::Elf_types
<size
>::Elf_Addr Mips_address
;
950 got16_addend(const Sized_relobj_file
<size
, big_endian
>* _object
,
951 unsigned int _shndx
, unsigned int _r_type
, unsigned int _r_sym
,
952 Mips_address _addend
)
953 : object(_object
), shndx(_shndx
), r_type(_r_type
), r_sym(_r_sym
),
957 const Sized_relobj_file
<size
, big_endian
>* object
;
964 // .MIPS.abiflags section content
966 template<bool big_endian
>
969 typedef typename
elfcpp::Swap
<8, big_endian
>::Valtype Valtype8
;
970 typedef typename
elfcpp::Swap
<16, big_endian
>::Valtype Valtype16
;
971 typedef typename
elfcpp::Swap
<32, big_endian
>::Valtype Valtype32
;
974 : version(0), isa_level(0), isa_rev(0), gpr_size(0), cpr1_size(0),
975 cpr2_size(0), fp_abi(0), isa_ext(0), ases(0), flags1(0), flags2(0)
978 // Version of flags structure.
980 // The level of the ISA: 1-5, 32, 64.
982 // The revision of ISA: 0 for MIPS V and below, 1-n otherwise.
984 // The size of general purpose registers.
986 // The size of co-processor 1 registers.
988 // The size of co-processor 2 registers.
990 // The floating-point ABI.
992 // Processor-specific extension.
994 // Mask of ASEs used.
996 // Mask of general flags.
1001 // Mips_symbol class. Holds additional symbol information needed for Mips.
1004 class Mips_symbol
: public Sized_symbol
<size
>
1008 : need_fn_stub_(false), has_nonpic_branches_(false), la25_stub_offset_(-1U),
1009 has_static_relocs_(false), no_lazy_stub_(false), lazy_stub_offset_(0),
1010 pointer_equality_needed_(false), global_got_area_(GGA_NONE
),
1011 global_gotoffset_(-1U), got_only_for_calls_(true), has_lazy_stub_(false),
1012 needs_mips_plt_(false), needs_comp_plt_(false), mips_plt_offset_(-1U),
1013 comp_plt_offset_(-1U), mips16_fn_stub_(NULL
), mips16_call_stub_(NULL
),
1014 mips16_call_fp_stub_(NULL
), applied_secondary_got_fixup_(false)
1017 // Return whether this is a MIPS16 symbol.
1021 // (st_other & STO_MIPS16) == STO_MIPS16
1022 return ((this->nonvis() & (elfcpp::STO_MIPS16
>> 2))
1023 == elfcpp::STO_MIPS16
>> 2);
1026 // Return whether this is a microMIPS symbol.
1028 is_micromips() const
1030 // (st_other & STO_MIPS_ISA) == STO_MICROMIPS
1031 return ((this->nonvis() & (elfcpp::STO_MIPS_ISA
>> 2))
1032 == elfcpp::STO_MICROMIPS
>> 2);
1035 // Return whether the symbol needs MIPS16 fn_stub.
1037 need_fn_stub() const
1038 { return this->need_fn_stub_
; }
1040 // Set that the symbol needs MIPS16 fn_stub.
1043 { this->need_fn_stub_
= true; }
1045 // Return whether this symbol is referenced by branch relocations from
1046 // any non-PIC input file.
1048 has_nonpic_branches() const
1049 { return this->has_nonpic_branches_
; }
1051 // Set that this symbol is referenced by branch relocations from
1052 // any non-PIC input file.
1054 set_has_nonpic_branches()
1055 { this->has_nonpic_branches_
= true; }
1057 // Return the offset of the la25 stub for this symbol from the start of the
1058 // la25 stub section.
1060 la25_stub_offset() const
1061 { return this->la25_stub_offset_
; }
1063 // Set the offset of the la25 stub for this symbol from the start of the
1064 // la25 stub section.
1066 set_la25_stub_offset(unsigned int offset
)
1067 { this->la25_stub_offset_
= offset
; }
1069 // Return whether the symbol has la25 stub. This is true if this symbol is
1070 // for a PIC function, and there are non-PIC branches and jumps to it.
1072 has_la25_stub() const
1073 { return this->la25_stub_offset_
!= -1U; }
1075 // Return whether there is a relocation against this symbol that must be
1076 // resolved by the static linker (that is, the relocation cannot possibly
1077 // be made dynamic).
1079 has_static_relocs() const
1080 { return this->has_static_relocs_
; }
1082 // Set that there is a relocation against this symbol that must be resolved
1083 // by the static linker (that is, the relocation cannot possibly be made
1086 set_has_static_relocs()
1087 { this->has_static_relocs_
= true; }
1089 // Return whether we must not create a lazy-binding stub for this symbol.
1091 no_lazy_stub() const
1092 { return this->no_lazy_stub_
; }
1094 // Set that we must not create a lazy-binding stub for this symbol.
1097 { this->no_lazy_stub_
= true; }
1099 // Return the offset of the lazy-binding stub for this symbol from the start
1100 // of .MIPS.stubs section.
1102 lazy_stub_offset() const
1103 { return this->lazy_stub_offset_
; }
1105 // Set the offset of the lazy-binding stub for this symbol from the start
1106 // of .MIPS.stubs section.
1108 set_lazy_stub_offset(unsigned int offset
)
1109 { this->lazy_stub_offset_
= offset
; }
1111 // Return whether there are any relocations for this symbol where
1112 // pointer equality matters.
1114 pointer_equality_needed() const
1115 { return this->pointer_equality_needed_
; }
1117 // Set that there are relocations for this symbol where pointer equality
1120 set_pointer_equality_needed()
1121 { this->pointer_equality_needed_
= true; }
1123 // Return global GOT area where this symbol in located.
1125 global_got_area() const
1126 { return this->global_got_area_
; }
1128 // Set global GOT area where this symbol in located.
1130 set_global_got_area(Global_got_area global_got_area
)
1131 { this->global_got_area_
= global_got_area
; }
1133 // Return the global GOT offset for this symbol. For multi-GOT links, this
1134 // returns the offset from the start of .got section to the first GOT entry
1135 // for the symbol. Note that in multi-GOT links the symbol can have entry
1136 // in more than one GOT.
1138 global_gotoffset() const
1139 { return this->global_gotoffset_
; }
1141 // Set the global GOT offset for this symbol. Note that in multi-GOT links
1142 // the symbol can have entry in more than one GOT. This method will set
1143 // the offset only if it is less than current offset.
1145 set_global_gotoffset(unsigned int offset
)
1147 if (this->global_gotoffset_
== -1U || offset
< this->global_gotoffset_
)
1148 this->global_gotoffset_
= offset
;
1151 // Return whether all GOT relocations for this symbol are for calls.
1153 got_only_for_calls() const
1154 { return this->got_only_for_calls_
; }
1156 // Set that there is a GOT relocation for this symbol that is not for call.
1158 set_got_not_only_for_calls()
1159 { this->got_only_for_calls_
= false; }
1161 // Return whether this is a PIC symbol.
1165 // (st_other & STO_MIPS_FLAGS) == STO_MIPS_PIC
1166 return ((this->nonvis() & (elfcpp::STO_MIPS_FLAGS
>> 2))
1167 == (elfcpp::STO_MIPS_PIC
>> 2));
1170 // Set the flag in st_other field that marks this symbol as PIC.
1174 if (this->is_mips16())
1175 // (st_other & ~(STO_MIPS16 | STO_MIPS_FLAGS)) | STO_MIPS_PIC
1176 this->set_nonvis((this->nonvis()
1177 & ~((elfcpp::STO_MIPS16
>> 2)
1178 | (elfcpp::STO_MIPS_FLAGS
>> 2)))
1179 | (elfcpp::STO_MIPS_PIC
>> 2));
1181 // (other & ~STO_MIPS_FLAGS) | STO_MIPS_PIC
1182 this->set_nonvis((this->nonvis() & ~(elfcpp::STO_MIPS_FLAGS
>> 2))
1183 | (elfcpp::STO_MIPS_PIC
>> 2));
1186 // Set the flag in st_other field that marks this symbol as PLT.
1190 if (this->is_mips16())
1191 // (st_other & (STO_MIPS16 | ~STO_MIPS_FLAGS)) | STO_MIPS_PLT
1192 this->set_nonvis((this->nonvis()
1193 & ((elfcpp::STO_MIPS16
>> 2)
1194 | ~(elfcpp::STO_MIPS_FLAGS
>> 2)))
1195 | (elfcpp::STO_MIPS_PLT
>> 2));
1198 // (st_other & ~STO_MIPS_FLAGS) | STO_MIPS_PLT
1199 this->set_nonvis((this->nonvis() & ~(elfcpp::STO_MIPS_FLAGS
>> 2))
1200 | (elfcpp::STO_MIPS_PLT
>> 2));
1203 // Downcast a base pointer to a Mips_symbol pointer.
1204 static Mips_symbol
<size
>*
1205 as_mips_sym(Symbol
* sym
)
1206 { return static_cast<Mips_symbol
<size
>*>(sym
); }
1208 // Downcast a base pointer to a Mips_symbol pointer.
1209 static const Mips_symbol
<size
>*
1210 as_mips_sym(const Symbol
* sym
)
1211 { return static_cast<const Mips_symbol
<size
>*>(sym
); }
1213 // Return whether the symbol has lazy-binding stub.
1215 has_lazy_stub() const
1216 { return this->has_lazy_stub_
; }
1218 // Set whether the symbol has lazy-binding stub.
1220 set_has_lazy_stub(bool has_lazy_stub
)
1221 { this->has_lazy_stub_
= has_lazy_stub
; }
1223 // Return whether the symbol needs a standard PLT entry.
1225 needs_mips_plt() const
1226 { return this->needs_mips_plt_
; }
1228 // Set whether the symbol needs a standard PLT entry.
1230 set_needs_mips_plt(bool needs_mips_plt
)
1231 { this->needs_mips_plt_
= needs_mips_plt
; }
1233 // Return whether the symbol needs a compressed (MIPS16 or microMIPS) PLT
1236 needs_comp_plt() const
1237 { return this->needs_comp_plt_
; }
1239 // Set whether the symbol needs a compressed (MIPS16 or microMIPS) PLT entry.
1241 set_needs_comp_plt(bool needs_comp_plt
)
1242 { this->needs_comp_plt_
= needs_comp_plt
; }
1244 // Return standard PLT entry offset, or -1 if none.
1246 mips_plt_offset() const
1247 { return this->mips_plt_offset_
; }
1249 // Set standard PLT entry offset.
1251 set_mips_plt_offset(unsigned int mips_plt_offset
)
1252 { this->mips_plt_offset_
= mips_plt_offset
; }
1254 // Return whether the symbol has standard PLT entry.
1256 has_mips_plt_offset() const
1257 { return this->mips_plt_offset_
!= -1U; }
1259 // Return compressed (MIPS16 or microMIPS) PLT entry offset, or -1 if none.
1261 comp_plt_offset() const
1262 { return this->comp_plt_offset_
; }
1264 // Set compressed (MIPS16 or microMIPS) PLT entry offset.
1266 set_comp_plt_offset(unsigned int comp_plt_offset
)
1267 { this->comp_plt_offset_
= comp_plt_offset
; }
1269 // Return whether the symbol has compressed (MIPS16 or microMIPS) PLT entry.
1271 has_comp_plt_offset() const
1272 { return this->comp_plt_offset_
!= -1U; }
1274 // Return MIPS16 fn stub for a symbol.
1275 template<bool big_endian
>
1276 Mips16_stub_section
<size
, big_endian
>*
1277 get_mips16_fn_stub() const
1279 return static_cast<Mips16_stub_section
<size
, big_endian
>*>(mips16_fn_stub_
);
1282 // Set MIPS16 fn stub for a symbol.
1284 set_mips16_fn_stub(Mips16_stub_section_base
* stub
)
1285 { this->mips16_fn_stub_
= stub
; }
1287 // Return whether symbol has MIPS16 fn stub.
1289 has_mips16_fn_stub() const
1290 { return this->mips16_fn_stub_
!= NULL
; }
1292 // Return MIPS16 call stub for a symbol.
1293 template<bool big_endian
>
1294 Mips16_stub_section
<size
, big_endian
>*
1295 get_mips16_call_stub() const
1297 return static_cast<Mips16_stub_section
<size
, big_endian
>*>(
1301 // Set MIPS16 call stub for a symbol.
1303 set_mips16_call_stub(Mips16_stub_section_base
* stub
)
1304 { this->mips16_call_stub_
= stub
; }
1306 // Return whether symbol has MIPS16 call stub.
1308 has_mips16_call_stub() const
1309 { return this->mips16_call_stub_
!= NULL
; }
1311 // Return MIPS16 call_fp stub for a symbol.
1312 template<bool big_endian
>
1313 Mips16_stub_section
<size
, big_endian
>*
1314 get_mips16_call_fp_stub() const
1316 return static_cast<Mips16_stub_section
<size
, big_endian
>*>(
1317 mips16_call_fp_stub_
);
1320 // Set MIPS16 call_fp stub for a symbol.
1322 set_mips16_call_fp_stub(Mips16_stub_section_base
* stub
)
1323 { this->mips16_call_fp_stub_
= stub
; }
1325 // Return whether symbol has MIPS16 call_fp stub.
1327 has_mips16_call_fp_stub() const
1328 { return this->mips16_call_fp_stub_
!= NULL
; }
1331 get_applied_secondary_got_fixup() const
1332 { return applied_secondary_got_fixup_
; }
1335 set_applied_secondary_got_fixup()
1336 { this->applied_secondary_got_fixup_
= true; }
1338 // Return the hash of this symbol.
1342 return gold::string_hash
<char>(this->name());
1346 // Whether the symbol needs MIPS16 fn_stub. This is true if this symbol
1347 // appears in any relocs other than a 16 bit call.
1350 // True if this symbol is referenced by branch relocations from
1351 // any non-PIC input file. This is used to determine whether an
1352 // la25 stub is required.
1353 bool has_nonpic_branches_
;
1355 // The offset of the la25 stub for this symbol from the start of the
1356 // la25 stub section.
1357 unsigned int la25_stub_offset_
;
1359 // True if there is a relocation against this symbol that must be
1360 // resolved by the static linker (that is, the relocation cannot
1361 // possibly be made dynamic).
1362 bool has_static_relocs_
;
1364 // Whether we must not create a lazy-binding stub for this symbol.
1365 // This is true if the symbol has relocations related to taking the
1366 // function's address.
1369 // The offset of the lazy-binding stub for this symbol from the start of
1370 // .MIPS.stubs section.
1371 unsigned int lazy_stub_offset_
;
1373 // True if there are any relocations for this symbol where pointer equality
1375 bool pointer_equality_needed_
;
1377 // Global GOT area where this symbol in located, or GGA_NONE if symbol is not
1378 // in the global part of the GOT.
1379 Global_got_area global_got_area_
;
1381 // The global GOT offset for this symbol. For multi-GOT links, this is offset
1382 // from the start of .got section to the first GOT entry for the symbol.
1383 // Note that in multi-GOT links the symbol can have entry in more than one GOT.
1384 unsigned int global_gotoffset_
;
1386 // Whether all GOT relocations for this symbol are for calls.
1387 bool got_only_for_calls_
;
1388 // Whether the symbol has lazy-binding stub.
1389 bool has_lazy_stub_
;
1390 // Whether the symbol needs a standard PLT entry.
1391 bool needs_mips_plt_
;
1392 // Whether the symbol needs a compressed (MIPS16 or microMIPS) PLT entry.
1393 bool needs_comp_plt_
;
1394 // Standard PLT entry offset, or -1 if none.
1395 unsigned int mips_plt_offset_
;
1396 // Compressed (MIPS16 or microMIPS) PLT entry offset, or -1 if none.
1397 unsigned int comp_plt_offset_
;
1398 // MIPS16 fn stub for a symbol.
1399 Mips16_stub_section_base
* mips16_fn_stub_
;
1400 // MIPS16 call stub for a symbol.
1401 Mips16_stub_section_base
* mips16_call_stub_
;
1402 // MIPS16 call_fp stub for a symbol.
1403 Mips16_stub_section_base
* mips16_call_fp_stub_
;
1405 bool applied_secondary_got_fixup_
;
1408 // Mips16_stub_section class.
1410 // The mips16 compiler uses a couple of special sections to handle
1411 // floating point arguments.
1413 // Section names that look like .mips16.fn.FNNAME contain stubs that
1414 // copy floating point arguments from the fp regs to the gp regs and
1415 // then jump to FNNAME. If any 32 bit function calls FNNAME, the
1416 // call should be redirected to the stub instead. If no 32 bit
1417 // function calls FNNAME, the stub should be discarded. We need to
1418 // consider any reference to the function, not just a call, because
1419 // if the address of the function is taken we will need the stub,
1420 // since the address might be passed to a 32 bit function.
1422 // Section names that look like .mips16.call.FNNAME contain stubs
1423 // that copy floating point arguments from the gp regs to the fp
1424 // regs and then jump to FNNAME. If FNNAME is a 32 bit function,
1425 // then any 16 bit function that calls FNNAME should be redirected
1426 // to the stub instead. If FNNAME is not a 32 bit function, the
1427 // stub should be discarded.
1429 // .mips16.call.fp.FNNAME sections are similar, but contain stubs
1430 // which call FNNAME and then copy the return value from the fp regs
1431 // to the gp regs. These stubs store the return address in $18 while
1432 // calling FNNAME; any function which might call one of these stubs
1433 // must arrange to save $18 around the call. (This case is not
1434 // needed for 32 bit functions that call 16 bit functions, because
1435 // 16 bit functions always return floating point values in both
1436 // $f0/$f1 and $2/$3.)
1438 // Note that in all cases FNNAME might be defined statically.
1439 // Therefore, FNNAME is not used literally. Instead, the relocation
1440 // information will indicate which symbol the section is for.
1442 // We record any stubs that we find in the symbol table.
1444 // TODO(sasa): All mips16 stub sections should be emitted in the .text section.
1446 class Mips16_stub_section_base
{ };
1448 template<int size
, bool big_endian
>
1449 class Mips16_stub_section
: public Mips16_stub_section_base
1451 typedef typename
elfcpp::Elf_types
<size
>::Elf_Addr Mips_address
;
1454 Mips16_stub_section(Mips_relobj
<size
, big_endian
>* object
, unsigned int shndx
)
1455 : object_(object
), shndx_(shndx
), r_sym_(0), gsym_(NULL
),
1456 found_r_mips_none_(false)
1458 gold_assert(object
->is_mips16_fn_stub_section(shndx
)
1459 || object
->is_mips16_call_stub_section(shndx
)
1460 || object
->is_mips16_call_fp_stub_section(shndx
));
1463 // Return the object of this stub section.
1464 Mips_relobj
<size
, big_endian
>*
1466 { return this->object_
; }
1468 // Return the size of a section.
1470 section_size() const
1471 { return this->object_
->section_size(this->shndx_
); }
1473 // Return section index of this stub section.
1476 { return this->shndx_
; }
1478 // Return symbol index, if stub is for a local function.
1481 { return this->r_sym_
; }
1483 // Return symbol, if stub is for a global function.
1486 { return this->gsym_
; }
1488 // Return whether stub is for a local function.
1490 is_for_local_function() const
1491 { return this->gsym_
== NULL
; }
1493 // This method is called when a new relocation R_TYPE for local symbol R_SYM
1494 // is found in the stub section. Try to find stub target.
1496 new_local_reloc_found(unsigned int r_type
, unsigned int r_sym
)
1498 // To find target symbol for this stub, trust the first R_MIPS_NONE
1499 // relocation, if any. Otherwise trust the first relocation, whatever
1501 if (this->found_r_mips_none_
)
1503 if (r_type
== elfcpp::R_MIPS_NONE
)
1505 this->r_sym_
= r_sym
;
1507 this->found_r_mips_none_
= true;
1509 else if (!is_target_found())
1510 this->r_sym_
= r_sym
;
1513 // This method is called when a new relocation R_TYPE for global symbol GSYM
1514 // is found in the stub section. Try to find stub target.
1516 new_global_reloc_found(unsigned int r_type
, Mips_symbol
<size
>* gsym
)
1518 // To find target symbol for this stub, trust the first R_MIPS_NONE
1519 // relocation, if any. Otherwise trust the first relocation, whatever
1521 if (this->found_r_mips_none_
)
1523 if (r_type
== elfcpp::R_MIPS_NONE
)
1527 this->found_r_mips_none_
= true;
1529 else if (!is_target_found())
1533 // Return whether we found the stub target.
1535 is_target_found() const
1536 { return this->r_sym_
!= 0 || this->gsym_
!= NULL
; }
1538 // Return whether this is a fn stub.
1541 { return this->object_
->is_mips16_fn_stub_section(this->shndx_
); }
1543 // Return whether this is a call stub.
1545 is_call_stub() const
1546 { return this->object_
->is_mips16_call_stub_section(this->shndx_
); }
1548 // Return whether this is a call_fp stub.
1550 is_call_fp_stub() const
1551 { return this->object_
->is_mips16_call_fp_stub_section(this->shndx_
); }
1553 // Return the output address.
1555 output_address() const
1557 return (this->object_
->output_section(this->shndx_
)->address()
1558 + this->object_
->output_section_offset(this->shndx_
));
1562 // The object of this stub section.
1563 Mips_relobj
<size
, big_endian
>* object_
;
1564 // The section index of this stub section.
1565 unsigned int shndx_
;
1566 // The symbol index, if stub is for a local function.
1567 unsigned int r_sym_
;
1568 // The symbol, if stub is for a global function.
1569 Mips_symbol
<size
>* gsym_
;
1570 // True if we found R_MIPS_NONE relocation in this stub.
1571 bool found_r_mips_none_
;
1574 // Mips_relobj class.
1576 template<int size
, bool big_endian
>
1577 class Mips_relobj
: public Sized_relobj_file
<size
, big_endian
>
1579 typedef typename
elfcpp::Elf_types
<size
>::Elf_Addr Mips_address
;
1580 typedef std::map
<unsigned int, Mips16_stub_section
<size
, big_endian
>*>
1581 Mips16_stubs_int_map
;
1582 typedef typename
elfcpp::Swap
<size
, big_endian
>::Valtype Valtype
;
1585 Mips_relobj(const std::string
& name
, Input_file
* input_file
, off_t offset
,
1586 const typename
elfcpp::Ehdr
<size
, big_endian
>& ehdr
)
1587 : Sized_relobj_file
<size
, big_endian
>(name
, input_file
, offset
, ehdr
),
1588 processor_specific_flags_(0), local_symbol_is_mips16_(),
1589 local_symbol_is_micromips_(), mips16_stub_sections_(),
1590 local_non_16bit_calls_(), local_16bit_calls_(), local_mips16_fn_stubs_(),
1591 local_mips16_call_stubs_(), gp_(0), has_reginfo_section_(false),
1592 got_info_(NULL
), section_is_mips16_fn_stub_(),
1593 section_is_mips16_call_stub_(), section_is_mips16_call_fp_stub_(),
1594 pdr_shndx_(-1U), attributes_section_data_(NULL
), abiflags_(NULL
),
1595 gprmask_(0), cprmask1_(0), cprmask2_(0), cprmask3_(0), cprmask4_(0)
1597 this->is_pic_
= (ehdr
.get_e_flags() & elfcpp::EF_MIPS_PIC
) != 0;
1598 this->is_n32_
= elfcpp::abi_n32(ehdr
.get_e_flags());
1602 { delete this->attributes_section_data_
; }
1604 // Downcast a base pointer to a Mips_relobj pointer. This is
1605 // not type-safe but we only use Mips_relobj not the base class.
1606 static Mips_relobj
<size
, big_endian
>*
1607 as_mips_relobj(Relobj
* relobj
)
1608 { return static_cast<Mips_relobj
<size
, big_endian
>*>(relobj
); }
1610 // Downcast a base pointer to a Mips_relobj pointer. This is
1611 // not type-safe but we only use Mips_relobj not the base class.
1612 static const Mips_relobj
<size
, big_endian
>*
1613 as_mips_relobj(const Relobj
* relobj
)
1614 { return static_cast<const Mips_relobj
<size
, big_endian
>*>(relobj
); }
1616 // Processor-specific flags in ELF file header. This is valid only after
1619 processor_specific_flags() const
1620 { return this->processor_specific_flags_
; }
1622 // Whether a local symbol is MIPS16 symbol. R_SYM is the symbol table
1623 // index. This is only valid after do_count_local_symbol is called.
1625 local_symbol_is_mips16(unsigned int r_sym
) const
1627 gold_assert(r_sym
< this->local_symbol_is_mips16_
.size());
1628 return this->local_symbol_is_mips16_
[r_sym
];
1631 // Whether a local symbol is microMIPS symbol. R_SYM is the symbol table
1632 // index. This is only valid after do_count_local_symbol is called.
1634 local_symbol_is_micromips(unsigned int r_sym
) const
1636 gold_assert(r_sym
< this->local_symbol_is_micromips_
.size());
1637 return this->local_symbol_is_micromips_
[r_sym
];
1640 // Get or create MIPS16 stub section.
1641 Mips16_stub_section
<size
, big_endian
>*
1642 get_mips16_stub_section(unsigned int shndx
)
1644 typename
Mips16_stubs_int_map::const_iterator it
=
1645 this->mips16_stub_sections_
.find(shndx
);
1646 if (it
!= this->mips16_stub_sections_
.end())
1647 return (*it
).second
;
1649 Mips16_stub_section
<size
, big_endian
>* stub_section
=
1650 new Mips16_stub_section
<size
, big_endian
>(this, shndx
);
1651 this->mips16_stub_sections_
.insert(
1652 std::pair
<unsigned int, Mips16_stub_section
<size
, big_endian
>*>(
1653 stub_section
->shndx(), stub_section
));
1654 return stub_section
;
1657 // Return MIPS16 fn stub section for local symbol R_SYM, or NULL if this
1658 // object doesn't have fn stub for R_SYM.
1659 Mips16_stub_section
<size
, big_endian
>*
1660 get_local_mips16_fn_stub(unsigned int r_sym
) const
1662 typename
Mips16_stubs_int_map::const_iterator it
=
1663 this->local_mips16_fn_stubs_
.find(r_sym
);
1664 if (it
!= this->local_mips16_fn_stubs_
.end())
1665 return (*it
).second
;
1669 // Record that this object has MIPS16 fn stub for local symbol. This method
1670 // is only called if we decided not to discard the stub.
1672 add_local_mips16_fn_stub(Mips16_stub_section
<size
, big_endian
>* stub
)
1674 gold_assert(stub
->is_for_local_function());
1675 unsigned int r_sym
= stub
->r_sym();
1676 this->local_mips16_fn_stubs_
.insert(
1677 std::pair
<unsigned int, Mips16_stub_section
<size
, big_endian
>*>(
1681 // Return MIPS16 call stub section for local symbol R_SYM, or NULL if this
1682 // object doesn't have call stub for R_SYM.
1683 Mips16_stub_section
<size
, big_endian
>*
1684 get_local_mips16_call_stub(unsigned int r_sym
) const
1686 typename
Mips16_stubs_int_map::const_iterator it
=
1687 this->local_mips16_call_stubs_
.find(r_sym
);
1688 if (it
!= this->local_mips16_call_stubs_
.end())
1689 return (*it
).second
;
1693 // Record that this object has MIPS16 call stub for local symbol. This method
1694 // is only called if we decided not to discard the stub.
1696 add_local_mips16_call_stub(Mips16_stub_section
<size
, big_endian
>* stub
)
1698 gold_assert(stub
->is_for_local_function());
1699 unsigned int r_sym
= stub
->r_sym();
1700 this->local_mips16_call_stubs_
.insert(
1701 std::pair
<unsigned int, Mips16_stub_section
<size
, big_endian
>*>(
1705 // Record that we found "non 16-bit" call relocation against local symbol
1706 // SYMNDX. This reloc would need to refer to a MIPS16 fn stub, if there
1709 add_local_non_16bit_call(unsigned int symndx
)
1710 { this->local_non_16bit_calls_
.insert(symndx
); }
1712 // Return true if there is any "non 16-bit" call relocation against local
1713 // symbol SYMNDX in this object.
1715 has_local_non_16bit_call_relocs(unsigned int symndx
)
1717 return (this->local_non_16bit_calls_
.find(symndx
)
1718 != this->local_non_16bit_calls_
.end());
1721 // Record that we found 16-bit call relocation R_MIPS16_26 against local
1722 // symbol SYMNDX. Local MIPS16 call or call_fp stubs will only be needed
1723 // if there is some R_MIPS16_26 relocation that refers to the stub symbol.
1725 add_local_16bit_call(unsigned int symndx
)
1726 { this->local_16bit_calls_
.insert(symndx
); }
1728 // Return true if there is any 16-bit call relocation R_MIPS16_26 against local
1729 // symbol SYMNDX in this object.
1731 has_local_16bit_call_relocs(unsigned int symndx
)
1733 return (this->local_16bit_calls_
.find(symndx
)
1734 != this->local_16bit_calls_
.end());
1737 // Get gp value that was used to create this object.
1740 { return this->gp_
; }
1742 // Return whether the object is a PIC object.
1745 { return this->is_pic_
; }
1747 // Return whether the object uses N32 ABI.
1750 { return this->is_n32_
; }
1752 // Return whether the object uses N64 ABI.
1755 { return size
== 64; }
1757 // Return whether the object uses NewABI conventions.
1760 { return this->is_n32() || this->is_n64(); }
1762 // Return Mips_got_info for this object.
1763 Mips_got_info
<size
, big_endian
>*
1764 get_got_info() const
1765 { return this->got_info_
; }
1767 // Return Mips_got_info for this object. Create new info if it doesn't exist.
1768 Mips_got_info
<size
, big_endian
>*
1769 get_or_create_got_info()
1771 if (!this->got_info_
)
1772 this->got_info_
= new Mips_got_info
<size
, big_endian
>();
1773 return this->got_info_
;
1776 // Set Mips_got_info for this object.
1778 set_got_info(Mips_got_info
<size
, big_endian
>* got_info
)
1779 { this->got_info_
= got_info
; }
1781 // Whether a section SHDNX is a MIPS16 stub section. This is only valid
1782 // after do_read_symbols is called.
1784 is_mips16_stub_section(unsigned int shndx
)
1786 return (is_mips16_fn_stub_section(shndx
)
1787 || is_mips16_call_stub_section(shndx
)
1788 || is_mips16_call_fp_stub_section(shndx
));
1791 // Return TRUE if relocations in section SHNDX can refer directly to a
1792 // MIPS16 function rather than to a hard-float stub. This is only valid
1793 // after do_read_symbols is called.
1795 section_allows_mips16_refs(unsigned int shndx
)
1797 return (this->is_mips16_stub_section(shndx
) || shndx
== this->pdr_shndx_
);
1800 // Whether a section SHDNX is a MIPS16 fn stub section. This is only valid
1801 // after do_read_symbols is called.
1803 is_mips16_fn_stub_section(unsigned int shndx
)
1805 gold_assert(shndx
< this->section_is_mips16_fn_stub_
.size());
1806 return this->section_is_mips16_fn_stub_
[shndx
];
1809 // Whether a section SHDNX is a MIPS16 call stub section. This is only valid
1810 // after do_read_symbols is called.
1812 is_mips16_call_stub_section(unsigned int shndx
)
1814 gold_assert(shndx
< this->section_is_mips16_call_stub_
.size());
1815 return this->section_is_mips16_call_stub_
[shndx
];
1818 // Whether a section SHDNX is a MIPS16 call_fp stub section. This is only
1819 // valid after do_read_symbols is called.
1821 is_mips16_call_fp_stub_section(unsigned int shndx
)
1823 gold_assert(shndx
< this->section_is_mips16_call_fp_stub_
.size());
1824 return this->section_is_mips16_call_fp_stub_
[shndx
];
1827 // Discard MIPS16 stub secions that are not needed.
1829 discard_mips16_stub_sections(Symbol_table
* symtab
);
1831 // Return whether there is a .reginfo section.
1833 has_reginfo_section() const
1834 { return this->has_reginfo_section_
; }
1836 // Return gprmask from the .reginfo section of this object.
1839 { return this->gprmask_
; }
1841 // Return cprmask1 from the .reginfo section of this object.
1844 { return this->cprmask1_
; }
1846 // Return cprmask2 from the .reginfo section of this object.
1849 { return this->cprmask2_
; }
1851 // Return cprmask3 from the .reginfo section of this object.
1854 { return this->cprmask3_
; }
1856 // Return cprmask4 from the .reginfo section of this object.
1859 { return this->cprmask4_
; }
1861 // This is the contents of the .MIPS.abiflags section if there is one.
1862 Mips_abiflags
<big_endian
>*
1864 { return this->abiflags_
; }
1866 // This is the contents of the .gnu.attribute section if there is one.
1867 const Attributes_section_data
*
1868 attributes_section_data() const
1869 { return this->attributes_section_data_
; }
1872 // Count the local symbols.
1874 do_count_local_symbols(Stringpool_template
<char>*,
1875 Stringpool_template
<char>*);
1877 // Read the symbol information.
1879 do_read_symbols(Read_symbols_data
* sd
);
1882 // The name of the options section.
1883 const char* mips_elf_options_section_name()
1884 { return this->is_newabi() ? ".MIPS.options" : ".options"; }
1886 // processor-specific flags in ELF file header.
1887 elfcpp::Elf_Word processor_specific_flags_
;
1889 // Bit vector to tell if a local symbol is a MIPS16 symbol or not.
1890 // This is only valid after do_count_local_symbol is called.
1891 std::vector
<bool> local_symbol_is_mips16_
;
1893 // Bit vector to tell if a local symbol is a microMIPS symbol or not.
1894 // This is only valid after do_count_local_symbol is called.
1895 std::vector
<bool> local_symbol_is_micromips_
;
1897 // Map from section index to the MIPS16 stub for that section. This contains
1898 // all stubs found in this object.
1899 Mips16_stubs_int_map mips16_stub_sections_
;
1901 // Local symbols that have "non 16-bit" call relocation. This relocation
1902 // would need to refer to a MIPS16 fn stub, if there is one.
1903 std::set
<unsigned int> local_non_16bit_calls_
;
1905 // Local symbols that have 16-bit call relocation R_MIPS16_26. Local MIPS16
1906 // call or call_fp stubs will only be needed if there is some R_MIPS16_26
1907 // relocation that refers to the stub symbol.
1908 std::set
<unsigned int> local_16bit_calls_
;
1910 // Map from local symbol index to the MIPS16 fn stub for that symbol.
1911 // This contains only the stubs that we decided not to discard.
1912 Mips16_stubs_int_map local_mips16_fn_stubs_
;
1914 // Map from local symbol index to the MIPS16 call stub for that symbol.
1915 // This contains only the stubs that we decided not to discard.
1916 Mips16_stubs_int_map local_mips16_call_stubs_
;
1918 // gp value that was used to create this object.
1920 // Whether the object is a PIC object.
1922 // Whether the object uses N32 ABI.
1924 // Whether the object contains a .reginfo section.
1925 bool has_reginfo_section_
: 1;
1926 // The Mips_got_info for this object.
1927 Mips_got_info
<size
, big_endian
>* got_info_
;
1929 // Bit vector to tell if a section is a MIPS16 fn stub section or not.
1930 // This is only valid after do_read_symbols is called.
1931 std::vector
<bool> section_is_mips16_fn_stub_
;
1933 // Bit vector to tell if a section is a MIPS16 call stub section or not.
1934 // This is only valid after do_read_symbols is called.
1935 std::vector
<bool> section_is_mips16_call_stub_
;
1937 // Bit vector to tell if a section is a MIPS16 call_fp stub section or not.
1938 // This is only valid after do_read_symbols is called.
1939 std::vector
<bool> section_is_mips16_call_fp_stub_
;
1941 // .pdr section index.
1942 unsigned int pdr_shndx_
;
1944 // Object attributes if there is a .gnu.attributes section or NULL.
1945 Attributes_section_data
* attributes_section_data_
;
1947 // Object abiflags if there is a .MIPS.abiflags section or NULL.
1948 Mips_abiflags
<big_endian
>* abiflags_
;
1950 // gprmask from the .reginfo section of this object.
1952 // cprmask1 from the .reginfo section of this object.
1954 // cprmask2 from the .reginfo section of this object.
1956 // cprmask3 from the .reginfo section of this object.
1958 // cprmask4 from the .reginfo section of this object.
1962 // Mips_output_data_got class.
1964 template<int size
, bool big_endian
>
1965 class Mips_output_data_got
: public Output_data_got
<size
, big_endian
>
1967 typedef typename
elfcpp::Elf_types
<size
>::Elf_Addr Mips_address
;
1968 typedef Output_data_reloc
<elfcpp::SHT_REL
, true, size
, big_endian
>
1970 typedef typename
elfcpp::Swap
<size
, big_endian
>::Valtype Valtype
;
1973 Mips_output_data_got(Target_mips
<size
, big_endian
>* target
,
1974 Symbol_table
* symtab
, Layout
* layout
)
1975 : Output_data_got
<size
, big_endian
>(), target_(target
),
1976 symbol_table_(symtab
), layout_(layout
), static_relocs_(), got_view_(NULL
),
1977 first_global_got_dynsym_index_(-1U), primary_got_(NULL
),
1978 secondary_got_relocs_()
1980 this->master_got_info_
= new Mips_got_info
<size
, big_endian
>();
1981 this->set_addralign(16);
1984 // Reserve GOT entry for a GOT relocation of type R_TYPE against symbol
1985 // SYMNDX + ADDEND, where SYMNDX is a local symbol in section SHNDX in OBJECT.
1987 record_local_got_symbol(Mips_relobj
<size
, big_endian
>* object
,
1988 unsigned int symndx
, Mips_address addend
,
1989 unsigned int r_type
, unsigned int shndx
,
1990 bool is_section_symbol
)
1992 this->master_got_info_
->record_local_got_symbol(object
, symndx
, addend
,
1997 // Reserve GOT entry for a GOT relocation of type R_TYPE against MIPS_SYM,
1998 // in OBJECT. FOR_CALL is true if the caller is only interested in
1999 // using the GOT entry for calls. DYN_RELOC is true if R_TYPE is a dynamic
2002 record_global_got_symbol(Mips_symbol
<size
>* mips_sym
,
2003 Mips_relobj
<size
, big_endian
>* object
,
2004 unsigned int r_type
, bool dyn_reloc
, bool for_call
)
2006 this->master_got_info_
->record_global_got_symbol(mips_sym
, object
, r_type
,
2007 dyn_reloc
, for_call
);
2010 // Record that OBJECT has a page relocation against symbol SYMNDX and
2011 // that ADDEND is the addend for that relocation.
2013 record_got_page_entry(Mips_relobj
<size
, big_endian
>* object
,
2014 unsigned int symndx
, int addend
)
2015 { this->master_got_info_
->record_got_page_entry(object
, symndx
, addend
); }
2017 // Add a static entry for the GOT entry at OFFSET. GSYM is a global
2018 // symbol and R_TYPE is the code of a dynamic relocation that needs to be
2019 // applied in a static link.
2021 add_static_reloc(unsigned int got_offset
, unsigned int r_type
,
2022 Mips_symbol
<size
>* gsym
)
2023 { this->static_relocs_
.push_back(Static_reloc(got_offset
, r_type
, gsym
)); }
2025 // Add a static reloc for the GOT entry at OFFSET. RELOBJ is an object
2026 // defining a local symbol with INDEX. R_TYPE is the code of a dynamic
2027 // relocation that needs to be applied in a static link.
2029 add_static_reloc(unsigned int got_offset
, unsigned int r_type
,
2030 Sized_relobj_file
<size
, big_endian
>* relobj
,
2033 this->static_relocs_
.push_back(Static_reloc(got_offset
, r_type
, relobj
,
2037 // Record that global symbol GSYM has R_TYPE dynamic relocation in the
2038 // secondary GOT at OFFSET.
2040 add_secondary_got_reloc(unsigned int got_offset
, unsigned int r_type
,
2041 Mips_symbol
<size
>* gsym
)
2043 this->secondary_got_relocs_
.push_back(Static_reloc(got_offset
,
2047 // Update GOT entry at OFFSET with VALUE.
2049 update_got_entry(unsigned int offset
, Mips_address value
)
2051 elfcpp::Swap
<size
, big_endian
>::writeval(this->got_view_
+ offset
, value
);
2054 // Return the number of entries in local part of the GOT. This includes
2055 // local entries, page entries and 2 reserved entries.
2057 get_local_gotno() const
2059 if (!this->multi_got())
2061 return (2 + this->master_got_info_
->local_gotno()
2062 + this->master_got_info_
->page_gotno());
2065 return 2 + this->primary_got_
->local_gotno() + this->primary_got_
->page_gotno();
2068 // Return dynamic symbol table index of the first symbol with global GOT
2071 first_global_got_dynsym_index() const
2072 { return this->first_global_got_dynsym_index_
; }
2074 // Set dynamic symbol table index of the first symbol with global GOT entry.
2076 set_first_global_got_dynsym_index(unsigned int index
)
2077 { this->first_global_got_dynsym_index_
= index
; }
2079 // Lay out the GOT. Add local, global and TLS entries. If GOT is
2080 // larger than 64K, create multi-GOT.
2082 lay_out_got(Layout
* layout
, Symbol_table
* symtab
,
2083 const Input_objects
* input_objects
);
2085 // Create multi-GOT. For every GOT, add local, global and TLS entries.
2087 lay_out_multi_got(Layout
* layout
, const Input_objects
* input_objects
);
2089 // Attempt to merge GOTs of different input objects.
2091 merge_gots(const Input_objects
* input_objects
);
2093 // Consider merging FROM, which is OBJECT's GOT, into TO. Return false if
2094 // this would lead to overflow, true if they were merged successfully.
2096 merge_got_with(Mips_got_info
<size
, big_endian
>* from
,
2097 Mips_relobj
<size
, big_endian
>* object
,
2098 Mips_got_info
<size
, big_endian
>* to
);
2100 // Return the offset of GOT page entry for VALUE. For multi-GOT links,
2101 // use OBJECT's GOT.
2103 get_got_page_offset(Mips_address value
,
2104 const Mips_relobj
<size
, big_endian
>* object
)
2106 Mips_got_info
<size
, big_endian
>* g
= (!this->multi_got()
2107 ? this->master_got_info_
2108 : object
->get_got_info());
2109 gold_assert(g
!= NULL
);
2110 return g
->get_got_page_offset(value
, this);
2113 // Return the GOT offset of type GOT_TYPE of the global symbol
2114 // GSYM. For multi-GOT links, use OBJECT's GOT.
2115 unsigned int got_offset(const Symbol
* gsym
, unsigned int got_type
,
2116 Mips_relobj
<size
, big_endian
>* object
) const
2118 if (!this->multi_got())
2119 return gsym
->got_offset(got_type
);
2122 Mips_got_info
<size
, big_endian
>* g
= object
->get_got_info();
2123 gold_assert(g
!= NULL
);
2124 return gsym
->got_offset(g
->multigot_got_type(got_type
));
2128 // Return the GOT offset of type GOT_TYPE of the local symbol
2131 got_offset(unsigned int symndx
, unsigned int got_type
,
2132 Sized_relobj_file
<size
, big_endian
>* object
,
2133 uint64_t addend
) const
2134 { return object
->local_got_offset(symndx
, got_type
, addend
); }
2136 // Return the offset of TLS LDM entry. For multi-GOT links, use OBJECT's GOT.
2138 tls_ldm_offset(Mips_relobj
<size
, big_endian
>* object
) const
2140 Mips_got_info
<size
, big_endian
>* g
= (!this->multi_got()
2141 ? this->master_got_info_
2142 : object
->get_got_info());
2143 gold_assert(g
!= NULL
);
2144 return g
->tls_ldm_offset();
2147 // Set the offset of TLS LDM entry. For multi-GOT links, use OBJECT's GOT.
2149 set_tls_ldm_offset(unsigned int tls_ldm_offset
,
2150 Mips_relobj
<size
, big_endian
>* object
)
2152 Mips_got_info
<size
, big_endian
>* g
= (!this->multi_got()
2153 ? this->master_got_info_
2154 : object
->get_got_info());
2155 gold_assert(g
!= NULL
);
2156 g
->set_tls_ldm_offset(tls_ldm_offset
);
2159 // Return true for multi-GOT links.
2162 { return this->primary_got_
!= NULL
; }
2164 // Return the offset of OBJECT's GOT from the start of .got section.
2166 get_got_offset(const Mips_relobj
<size
, big_endian
>* object
)
2168 if (!this->multi_got())
2172 Mips_got_info
<size
, big_endian
>* g
= object
->get_got_info();
2173 return g
!= NULL
? g
->offset() : 0;
2177 // Create global GOT entries that should be in the GGA_RELOC_ONLY area.
2179 add_reloc_only_entries()
2180 { this->master_got_info_
->add_reloc_only_entries(this); }
2182 // Return offset of the primary GOT's entry for global symbol.
2184 get_primary_got_offset(const Mips_symbol
<size
>* sym
) const
2186 gold_assert(sym
->global_got_area() != GGA_NONE
);
2187 return (this->get_local_gotno() + sym
->dynsym_index()
2188 - this->first_global_got_dynsym_index()) * size
/8;
2191 // For the entry at offset GOT_OFFSET, return its offset from the gp.
2192 // Input argument GOT_OFFSET is always global offset from the start of
2193 // .got section, for both single and multi-GOT links.
2194 // For single GOT links, this returns GOT_OFFSET - 0x7FF0. For multi-GOT
2195 // links, the return value is object_got_offset - 0x7FF0, where
2196 // object_got_offset is offset in the OBJECT's GOT.
2198 gp_offset(unsigned int got_offset
,
2199 const Mips_relobj
<size
, big_endian
>* object
) const
2201 return (this->address() + got_offset
2202 - this->target_
->adjusted_gp_value(object
));
2206 // Write out the GOT table.
2208 do_write(Output_file
*);
2212 // This class represent dynamic relocations that need to be applied by
2213 // gold because we are using TLS relocations in a static link.
2217 Static_reloc(unsigned int got_offset
, unsigned int r_type
,
2218 Mips_symbol
<size
>* gsym
)
2219 : got_offset_(got_offset
), r_type_(r_type
), symbol_is_global_(true)
2220 { this->u_
.global
.symbol
= gsym
; }
2222 Static_reloc(unsigned int got_offset
, unsigned int r_type
,
2223 Sized_relobj_file
<size
, big_endian
>* relobj
, unsigned int index
)
2224 : got_offset_(got_offset
), r_type_(r_type
), symbol_is_global_(false)
2226 this->u_
.local
.relobj
= relobj
;
2227 this->u_
.local
.index
= index
;
2230 // Return the GOT offset.
2233 { return this->got_offset_
; }
2238 { return this->r_type_
; }
2240 // Whether the symbol is global or not.
2242 symbol_is_global() const
2243 { return this->symbol_is_global_
; }
2245 // For a relocation against a global symbol, the global symbol.
2249 gold_assert(this->symbol_is_global_
);
2250 return this->u_
.global
.symbol
;
2253 // For a relocation against a local symbol, the defining object.
2254 Sized_relobj_file
<size
, big_endian
>*
2257 gold_assert(!this->symbol_is_global_
);
2258 return this->u_
.local
.relobj
;
2261 // For a relocation against a local symbol, the local symbol index.
2265 gold_assert(!this->symbol_is_global_
);
2266 return this->u_
.local
.index
;
2270 // GOT offset of the entry to which this relocation is applied.
2271 unsigned int got_offset_
;
2272 // Type of relocation.
2273 unsigned int r_type_
;
2274 // Whether this relocation is against a global symbol.
2275 bool symbol_is_global_
;
2276 // A global or local symbol.
2281 // For a global symbol, the symbol itself.
2282 Mips_symbol
<size
>* symbol
;
2286 // For a local symbol, the object defining object.
2287 Sized_relobj_file
<size
, big_endian
>* relobj
;
2288 // For a local symbol, the symbol index.
2295 Target_mips
<size
, big_endian
>* target_
;
2296 // The symbol table.
2297 Symbol_table
* symbol_table_
;
2300 // Static relocs to be applied to the GOT.
2301 std::vector
<Static_reloc
> static_relocs_
;
2302 // .got section view.
2303 unsigned char* got_view_
;
2304 // The dynamic symbol table index of the first symbol with global GOT entry.
2305 unsigned int first_global_got_dynsym_index_
;
2306 // The master GOT information.
2307 Mips_got_info
<size
, big_endian
>* master_got_info_
;
2308 // The primary GOT information.
2309 Mips_got_info
<size
, big_endian
>* primary_got_
;
2310 // Secondary GOT fixups.
2311 std::vector
<Static_reloc
> secondary_got_relocs_
;
2314 // A class to handle LA25 stubs - non-PIC interface to a PIC function. There are
2315 // two ways of creating these interfaces. The first is to add:
2317 // lui $25,%hi(func)
2319 // addiu $25,$25,%lo(func)
2321 // to a separate trampoline section. The second is to add:
2323 // lui $25,%hi(func)
2324 // addiu $25,$25,%lo(func)
2326 // immediately before a PIC function "func", but only if a function is at the
2327 // beginning of the section, and the section is not too heavily aligned (i.e we
2328 // would need to add no more than 2 nops before the stub.)
2330 // We only create stubs of the first type.
2332 template<int size
, bool big_endian
>
2333 class Mips_output_data_la25_stub
: public Output_section_data
2335 typedef typename
elfcpp::Elf_types
<size
>::Elf_Addr Mips_address
;
2338 Mips_output_data_la25_stub()
2339 : Output_section_data(size
== 32 ? 4 : 8), symbols_()
2342 // Create LA25 stub for a symbol.
2344 create_la25_stub(Symbol_table
* symtab
, Target_mips
<size
, big_endian
>* target
,
2345 Mips_symbol
<size
>* gsym
);
2347 // Return output address of a stub.
2349 stub_address(const Mips_symbol
<size
>* sym
) const
2351 gold_assert(sym
->has_la25_stub());
2352 return this->address() + sym
->la25_stub_offset();
2357 do_adjust_output_section(Output_section
* os
)
2358 { os
->set_entsize(0); }
2361 // Template for standard LA25 stub.
2362 static const uint32_t la25_stub_entry
[];
2363 // Template for microMIPS LA25 stub.
2364 static const uint32_t la25_stub_micromips_entry
[];
2366 // Set the final size.
2368 set_final_data_size()
2369 { this->set_data_size(this->symbols_
.size() * 16); }
2371 // Create a symbol for SYM stub's value and size, to help make the
2372 // disassembly easier to read.
2374 create_stub_symbol(Mips_symbol
<size
>* sym
, Symbol_table
* symtab
,
2375 Target_mips
<size
, big_endian
>* target
, uint64_t symsize
);
2377 // Write to a map file.
2379 do_print_to_mapfile(Mapfile
* mapfile
) const
2380 { mapfile
->print_output_data(this, _(".LA25.stubs")); }
2382 // Write out the LA25 stub section.
2384 do_write(Output_file
*);
2386 // Symbols that have LA25 stubs.
2387 std::vector
<Mips_symbol
<size
>*> symbols_
;
2390 // MIPS-specific relocation writer.
2392 template<int sh_type
, bool dynamic
, int size
, bool big_endian
>
2393 struct Mips_output_reloc_writer
;
2395 template<int sh_type
, bool dynamic
, bool big_endian
>
2396 struct Mips_output_reloc_writer
<sh_type
, dynamic
, 32, big_endian
>
2398 typedef Output_reloc
<sh_type
, dynamic
, 32, big_endian
> Output_reloc_type
;
2399 typedef std::vector
<Output_reloc_type
> Relocs
;
2402 write(typename
Relocs::const_iterator p
, unsigned char* pov
)
2406 template<int sh_type
, bool dynamic
, bool big_endian
>
2407 struct Mips_output_reloc_writer
<sh_type
, dynamic
, 64, big_endian
>
2409 typedef Output_reloc
<sh_type
, dynamic
, 64, big_endian
> Output_reloc_type
;
2410 typedef std::vector
<Output_reloc_type
> Relocs
;
2413 write(typename
Relocs::const_iterator p
, unsigned char* pov
)
2415 elfcpp::Mips64_rel_write
<big_endian
> orel(pov
);
2416 orel
.put_r_offset(p
->get_address());
2417 orel
.put_r_sym(p
->get_symbol_index());
2418 orel
.put_r_ssym(RSS_UNDEF
);
2419 orel
.put_r_type(p
->type());
2420 if (p
->type() == elfcpp::R_MIPS_REL32
)
2421 orel
.put_r_type2(elfcpp::R_MIPS_64
);
2423 orel
.put_r_type2(elfcpp::R_MIPS_NONE
);
2424 orel
.put_r_type3(elfcpp::R_MIPS_NONE
);
2428 template<int sh_type
, bool dynamic
, int size
, bool big_endian
>
2429 class Mips_output_data_reloc
: public Output_data_reloc
<sh_type
, dynamic
,
2433 Mips_output_data_reloc(bool sort_relocs
)
2434 : Output_data_reloc
<sh_type
, dynamic
, size
, big_endian
>(sort_relocs
)
2438 // Write out the data.
2440 do_write(Output_file
* of
)
2442 typedef Mips_output_reloc_writer
<sh_type
, dynamic
, size
,
2444 this->template do_write_generic
<Writer
>(of
);
2449 // A class to handle the PLT data.
2451 template<int size
, bool big_endian
>
2452 class Mips_output_data_plt
: public Output_section_data
2454 typedef typename
elfcpp::Elf_types
<size
>::Elf_Addr Mips_address
;
2455 typedef Mips_output_data_reloc
<elfcpp::SHT_REL
, true,
2456 size
, big_endian
> Reloc_section
;
2459 // Create the PLT section. The ordinary .got section is an argument,
2460 // since we need to refer to the start.
2461 Mips_output_data_plt(Layout
* layout
, Output_data_space
* got_plt
,
2462 Target_mips
<size
, big_endian
>* target
)
2463 : Output_section_data(size
== 32 ? 4 : 8), got_plt_(got_plt
), symbols_(),
2464 plt_mips_offset_(0), plt_comp_offset_(0), plt_header_size_(0),
2467 this->rel_
= new Reloc_section(false);
2468 layout
->add_output_section_data(".rel.plt", elfcpp::SHT_REL
,
2469 elfcpp::SHF_ALLOC
, this->rel_
,
2470 ORDER_DYNAMIC_PLT_RELOCS
, false);
2473 // Add an entry to the PLT for a symbol referenced by r_type relocation.
2475 add_entry(Mips_symbol
<size
>* gsym
, unsigned int r_type
);
2477 // Return the .rel.plt section data.
2480 { return this->rel_
; }
2482 // Return the number of PLT entries.
2485 { return this->symbols_
.size(); }
2487 // Return the offset of the first non-reserved PLT entry.
2489 first_plt_entry_offset() const
2490 { return sizeof(plt0_entry_o32
); }
2492 // Return the size of a PLT entry.
2494 plt_entry_size() const
2495 { return sizeof(plt_entry
); }
2497 // Set final PLT offsets. For each symbol, determine whether standard or
2498 // compressed (MIPS16 or microMIPS) PLT entry is used.
2502 // Return the offset of the first standard PLT entry.
2504 first_mips_plt_offset() const
2505 { return this->plt_header_size_
; }
2507 // Return the offset of the first compressed PLT entry.
2509 first_comp_plt_offset() const
2510 { return this->plt_header_size_
+ this->plt_mips_offset_
; }
2512 // Return whether there are any standard PLT entries.
2514 has_standard_entries() const
2515 { return this->plt_mips_offset_
> 0; }
2517 // Return the output address of standard PLT entry.
2519 mips_entry_address(const Mips_symbol
<size
>* sym
) const
2521 gold_assert (sym
->has_mips_plt_offset());
2522 return (this->address() + this->first_mips_plt_offset()
2523 + sym
->mips_plt_offset());
2526 // Return the output address of compressed (MIPS16 or microMIPS) PLT entry.
2528 comp_entry_address(const Mips_symbol
<size
>* sym
) const
2530 gold_assert (sym
->has_comp_plt_offset());
2531 return (this->address() + this->first_comp_plt_offset()
2532 + sym
->comp_plt_offset());
2537 do_adjust_output_section(Output_section
* os
)
2538 { os
->set_entsize(0); }
2540 // Write to a map file.
2542 do_print_to_mapfile(Mapfile
* mapfile
) const
2543 { mapfile
->print_output_data(this, _(".plt")); }
2546 // Template for the first PLT entry.
2547 static const uint32_t plt0_entry_o32
[];
2548 static const uint32_t plt0_entry_n32
[];
2549 static const uint32_t plt0_entry_n64
[];
2550 static const uint32_t plt0_entry_micromips_o32
[];
2551 static const uint32_t plt0_entry_micromips32_o32
[];
2553 // Template for subsequent PLT entries.
2554 static const uint32_t plt_entry
[];
2555 static const uint32_t plt_entry_r6
[];
2556 static const uint32_t plt_entry_mips16_o32
[];
2557 static const uint32_t plt_entry_micromips_o32
[];
2558 static const uint32_t plt_entry_micromips32_o32
[];
2560 // Set the final size.
2562 set_final_data_size()
2564 this->set_data_size(this->plt_header_size_
+ this->plt_mips_offset_
2565 + this->plt_comp_offset_
);
2568 // Write out the PLT data.
2570 do_write(Output_file
*);
2572 // Return whether the plt header contains microMIPS code. For the sake of
2573 // cache alignment always use a standard header whenever any standard entries
2574 // are present even if microMIPS entries are present as well. This also lets
2575 // the microMIPS header rely on the value of $v0 only set by microMIPS
2576 // entries, for a small size reduction.
2578 is_plt_header_compressed() const
2580 gold_assert(this->plt_mips_offset_
+ this->plt_comp_offset_
!= 0);
2581 return this->target_
->is_output_micromips() && this->plt_mips_offset_
== 0;
2584 // Return the size of the PLT header.
2586 get_plt_header_size() const
2588 if (this->target_
->is_output_n64())
2589 return 4 * sizeof(plt0_entry_n64
) / sizeof(plt0_entry_n64
[0]);
2590 else if (this->target_
->is_output_n32())
2591 return 4 * sizeof(plt0_entry_n32
) / sizeof(plt0_entry_n32
[0]);
2592 else if (!this->is_plt_header_compressed())
2593 return 4 * sizeof(plt0_entry_o32
) / sizeof(plt0_entry_o32
[0]);
2594 else if (this->target_
->use_32bit_micromips_instructions())
2595 return (2 * sizeof(plt0_entry_micromips32_o32
)
2596 / sizeof(plt0_entry_micromips32_o32
[0]));
2598 return (2 * sizeof(plt0_entry_micromips_o32
)
2599 / sizeof(plt0_entry_micromips_o32
[0]));
2602 // Return the PLT header entry.
2604 get_plt_header_entry() const
2606 if (this->target_
->is_output_n64())
2607 return plt0_entry_n64
;
2608 else if (this->target_
->is_output_n32())
2609 return plt0_entry_n32
;
2610 else if (!this->is_plt_header_compressed())
2611 return plt0_entry_o32
;
2612 else if (this->target_
->use_32bit_micromips_instructions())
2613 return plt0_entry_micromips32_o32
;
2615 return plt0_entry_micromips_o32
;
2618 // Return the size of the standard PLT entry.
2620 standard_plt_entry_size() const
2621 { return 4 * sizeof(plt_entry
) / sizeof(plt_entry
[0]); }
2623 // Return the size of the compressed PLT entry.
2625 compressed_plt_entry_size() const
2627 gold_assert(!this->target_
->is_output_newabi());
2629 if (!this->target_
->is_output_micromips())
2630 return (2 * sizeof(plt_entry_mips16_o32
)
2631 / sizeof(plt_entry_mips16_o32
[0]));
2632 else if (this->target_
->use_32bit_micromips_instructions())
2633 return (2 * sizeof(plt_entry_micromips32_o32
)
2634 / sizeof(plt_entry_micromips32_o32
[0]));
2636 return (2 * sizeof(plt_entry_micromips_o32
)
2637 / sizeof(plt_entry_micromips_o32
[0]));
2640 // The reloc section.
2641 Reloc_section
* rel_
;
2642 // The .got.plt section.
2643 Output_data_space
* got_plt_
;
2644 // Symbols that have PLT entry.
2645 std::vector
<Mips_symbol
<size
>*> symbols_
;
2646 // The offset of the next standard PLT entry to create.
2647 unsigned int plt_mips_offset_
;
2648 // The offset of the next compressed PLT entry to create.
2649 unsigned int plt_comp_offset_
;
2650 // The size of the PLT header in bytes.
2651 unsigned int plt_header_size_
;
2653 Target_mips
<size
, big_endian
>* target_
;
2656 // A class to handle the .MIPS.stubs data.
2658 template<int size
, bool big_endian
>
2659 class Mips_output_data_mips_stubs
: public Output_section_data
2661 typedef typename
elfcpp::Elf_types
<size
>::Elf_Addr Mips_address
;
2663 // Unordered set of .MIPS.stubs entries.
2664 typedef Unordered_set
<Mips_symbol
<size
>*, Mips_symbol_hash
<size
> >
2665 Mips_stubs_entry_set
;
2668 Mips_output_data_mips_stubs(Target_mips
<size
, big_endian
>* target
)
2669 : Output_section_data(size
== 32 ? 4 : 8), symbols_(), dynsym_count_(-1U),
2670 stub_offsets_are_set_(false), target_(target
)
2673 // Create entry for a symbol.
2675 make_entry(Mips_symbol
<size
>*);
2677 // Remove entry for a symbol.
2679 remove_entry(Mips_symbol
<size
>* gsym
);
2681 // Set stub offsets for symbols. This method expects that the number of
2682 // entries in dynamic symbol table is set.
2684 set_lazy_stub_offsets();
2687 set_needs_dynsym_value();
2689 // Set the number of entries in dynamic symbol table.
2691 set_dynsym_count(unsigned int dynsym_count
)
2692 { this->dynsym_count_
= dynsym_count
; }
2694 // Return maximum size of the stub, ie. the stub size if the dynamic symbol
2695 // count is greater than 0x10000. If the dynamic symbol count is less than
2696 // 0x10000, the stub will be 4 bytes smaller.
2697 // There's no disadvantage from using microMIPS code here, so for the sake of
2698 // pure-microMIPS binaries we prefer it whenever there's any microMIPS code in
2699 // output produced at all. This has a benefit of stubs being shorter by
2700 // 4 bytes each too, unless in the insn32 mode.
2702 stub_max_size() const
2704 if (!this->target_
->is_output_micromips()
2705 || this->target_
->use_32bit_micromips_instructions())
2711 // Return the size of the stub. This method expects that the final dynsym
2716 gold_assert(this->dynsym_count_
!= -1U);
2717 if (this->dynsym_count_
> 0x10000)
2718 return this->stub_max_size();
2720 return this->stub_max_size() - 4;
2723 // Return output address of a stub.
2725 stub_address(const Mips_symbol
<size
>* sym
) const
2727 gold_assert(sym
->has_lazy_stub());
2728 return this->address() + sym
->lazy_stub_offset();
2733 do_adjust_output_section(Output_section
* os
)
2734 { os
->set_entsize(0); }
2736 // Write to a map file.
2738 do_print_to_mapfile(Mapfile
* mapfile
) const
2739 { mapfile
->print_output_data(this, _(".MIPS.stubs")); }
2742 static const uint32_t lazy_stub_normal_1
[];
2743 static const uint32_t lazy_stub_normal_1_n64
[];
2744 static const uint32_t lazy_stub_normal_2
[];
2745 static const uint32_t lazy_stub_normal_2_n64
[];
2746 static const uint32_t lazy_stub_big
[];
2747 static const uint32_t lazy_stub_big_n64
[];
2749 static const uint32_t lazy_stub_micromips_normal_1
[];
2750 static const uint32_t lazy_stub_micromips_normal_1_n64
[];
2751 static const uint32_t lazy_stub_micromips_normal_2
[];
2752 static const uint32_t lazy_stub_micromips_normal_2_n64
[];
2753 static const uint32_t lazy_stub_micromips_big
[];
2754 static const uint32_t lazy_stub_micromips_big_n64
[];
2756 static const uint32_t lazy_stub_micromips32_normal_1
[];
2757 static const uint32_t lazy_stub_micromips32_normal_1_n64
[];
2758 static const uint32_t lazy_stub_micromips32_normal_2
[];
2759 static const uint32_t lazy_stub_micromips32_normal_2_n64
[];
2760 static const uint32_t lazy_stub_micromips32_big
[];
2761 static const uint32_t lazy_stub_micromips32_big_n64
[];
2763 // Set the final size.
2765 set_final_data_size()
2766 { this->set_data_size(this->symbols_
.size() * this->stub_max_size()); }
2768 // Write out the .MIPS.stubs data.
2770 do_write(Output_file
*);
2772 // .MIPS.stubs symbols
2773 Mips_stubs_entry_set symbols_
;
2774 // Number of entries in dynamic symbol table.
2775 unsigned int dynsym_count_
;
2776 // Whether the stub offsets are set.
2777 bool stub_offsets_are_set_
;
2779 Target_mips
<size
, big_endian
>* target_
;
2782 // This class handles Mips .reginfo output section.
2784 template<int size
, bool big_endian
>
2785 class Mips_output_section_reginfo
: public Output_section_data
2787 typedef typename
elfcpp::Swap
<size
, big_endian
>::Valtype Valtype
;
2790 Mips_output_section_reginfo(Target_mips
<size
, big_endian
>* target
,
2791 Valtype gprmask
, Valtype cprmask1
,
2792 Valtype cprmask2
, Valtype cprmask3
,
2794 : Output_section_data(24, 4, true), target_(target
),
2795 gprmask_(gprmask
), cprmask1_(cprmask1
), cprmask2_(cprmask2
),
2796 cprmask3_(cprmask3
), cprmask4_(cprmask4
)
2800 // Write to a map file.
2802 do_print_to_mapfile(Mapfile
* mapfile
) const
2803 { mapfile
->print_output_data(this, _(".reginfo")); }
2805 // Write out reginfo section.
2807 do_write(Output_file
* of
);
2810 Target_mips
<size
, big_endian
>* target_
;
2812 // gprmask of the output .reginfo section.
2814 // cprmask1 of the output .reginfo section.
2816 // cprmask2 of the output .reginfo section.
2818 // cprmask3 of the output .reginfo section.
2820 // cprmask4 of the output .reginfo section.
2824 // This class handles .MIPS.abiflags output section.
2826 template<int size
, bool big_endian
>
2827 class Mips_output_section_abiflags
: public Output_section_data
2830 Mips_output_section_abiflags(const Mips_abiflags
<big_endian
>& abiflags
)
2831 : Output_section_data(24, 8, true), abiflags_(abiflags
)
2835 // Write to a map file.
2837 do_print_to_mapfile(Mapfile
* mapfile
) const
2838 { mapfile
->print_output_data(this, _(".MIPS.abiflags")); }
2841 do_write(Output_file
* of
);
2844 const Mips_abiflags
<big_endian
>& abiflags_
;
2847 // The MIPS target has relocation types which default handling of relocatable
2848 // relocation cannot process. So we have to extend the default code.
2850 template<bool big_endian
, typename Classify_reloc
>
2851 class Mips_scan_relocatable_relocs
:
2852 public Default_scan_relocatable_relocs
<Classify_reloc
>
2855 // Return the strategy to use for a local symbol which is a section
2856 // symbol, given the relocation type.
2857 inline Relocatable_relocs::Reloc_strategy
2858 local_section_strategy(unsigned int r_type
, Relobj
* object
)
2860 if (Classify_reloc::sh_type
== elfcpp::SHT_RELA
)
2861 return Relocatable_relocs::RELOC_ADJUST_FOR_SECTION_RELA
;
2866 case elfcpp::R_MIPS_26
:
2867 return Relocatable_relocs::RELOC_SPECIAL
;
2870 return Default_scan_relocatable_relocs
<Classify_reloc
>::
2871 local_section_strategy(r_type
, object
);
2877 // Mips_copy_relocs class. The only difference from the base class is the
2878 // method emit_mips, which should be called instead of Copy_reloc_entry::emit.
2879 // Mips cannot convert all relocation types to dynamic relocs. If a reloc
2880 // cannot be made dynamic, a COPY reloc is emitted.
2882 template<int sh_type
, int size
, bool big_endian
>
2883 class Mips_copy_relocs
: public Copy_relocs
<sh_type
, size
, big_endian
>
2887 : Copy_relocs
<sh_type
, size
, big_endian
>(elfcpp::R_MIPS_COPY
)
2890 // Emit any saved relocations which turn out to be needed. This is
2891 // called after all the relocs have been scanned.
2893 emit_mips(Output_data_reloc
<sh_type
, true, size
, big_endian
>*,
2894 Symbol_table
*, Layout
*, Target_mips
<size
, big_endian
>*);
2897 typedef typename Copy_relocs
<sh_type
, size
, big_endian
>::Copy_reloc_entry
2900 // Emit this reloc if appropriate. This is called after we have
2901 // scanned all the relocations, so we know whether we emitted a
2902 // COPY relocation for SYM_.
2904 emit_entry(Copy_reloc_entry
& entry
,
2905 Output_data_reloc
<sh_type
, true, size
, big_endian
>* reloc_section
,
2906 Symbol_table
* symtab
, Layout
* layout
,
2907 Target_mips
<size
, big_endian
>* target
);
2911 // Return true if the symbol SYM should be considered to resolve local
2912 // to the current module, and false otherwise. The logic is taken from
2913 // GNU ld's method _bfd_elf_symbol_refs_local_p.
2915 symbol_refs_local(const Symbol
* sym
, bool has_dynsym_entry
,
2916 bool local_protected
)
2918 // If it's a local sym, of course we resolve locally.
2922 // STV_HIDDEN or STV_INTERNAL ones must be local.
2923 if (sym
->visibility() == elfcpp::STV_HIDDEN
2924 || sym
->visibility() == elfcpp::STV_INTERNAL
)
2927 // If we don't have a definition in a regular file, then we can't
2928 // resolve locally. The sym is either undefined or dynamic.
2929 if (sym
->is_from_dynobj() || sym
->is_undefined())
2932 // Forced local symbols resolve locally.
2933 if (sym
->is_forced_local())
2936 // As do non-dynamic symbols.
2937 if (!has_dynsym_entry
)
2940 // At this point, we know the symbol is defined and dynamic. In an
2941 // executable it must resolve locally, likewise when building symbolic
2942 // shared libraries.
2943 if (parameters
->options().output_is_executable()
2944 || parameters
->options().Bsymbolic())
2947 // Now deal with defined dynamic symbols in shared libraries. Ones
2948 // with default visibility might not resolve locally.
2949 if (sym
->visibility() == elfcpp::STV_DEFAULT
)
2952 // STV_PROTECTED non-function symbols are local.
2953 if (sym
->type() != elfcpp::STT_FUNC
)
2956 // Function pointer equality tests may require that STV_PROTECTED
2957 // symbols be treated as dynamic symbols. If the address of a
2958 // function not defined in an executable is set to that function's
2959 // plt entry in the executable, then the address of the function in
2960 // a shared library must also be the plt entry in the executable.
2961 return local_protected
;
2964 // Return TRUE if references to this symbol always reference the symbol in this
2967 symbol_references_local(const Symbol
* sym
, bool has_dynsym_entry
)
2969 return symbol_refs_local(sym
, has_dynsym_entry
, false);
2972 // Return TRUE if calls to this symbol always call the version in this object.
2974 symbol_calls_local(const Symbol
* sym
, bool has_dynsym_entry
)
2976 return symbol_refs_local(sym
, has_dynsym_entry
, true);
2979 // Compare GOT offsets of two symbols.
2981 template<int size
, bool big_endian
>
2983 got_offset_compare(Symbol
* sym1
, Symbol
* sym2
)
2985 Mips_symbol
<size
>* mips_sym1
= Mips_symbol
<size
>::as_mips_sym(sym1
);
2986 Mips_symbol
<size
>* mips_sym2
= Mips_symbol
<size
>::as_mips_sym(sym2
);
2987 unsigned int area1
= mips_sym1
->global_got_area();
2988 unsigned int area2
= mips_sym2
->global_got_area();
2989 gold_assert(area1
!= GGA_NONE
&& area1
!= GGA_NONE
);
2991 // GGA_NORMAL entries always come before GGA_RELOC_ONLY.
2993 return area1
< area2
;
2995 return mips_sym1
->global_gotoffset() < mips_sym2
->global_gotoffset();
2998 // This method divides dynamic symbols into symbols that have GOT entry, and
2999 // symbols that don't have GOT entry. It also sorts symbols with the GOT entry.
3000 // Mips ABI requires that symbols with the GOT entry must be at the end of
3001 // dynamic symbol table, and the order in dynamic symbol table must match the
3004 template<int size
, bool big_endian
>
3006 reorder_dyn_symbols(std::vector
<Symbol
*>* dyn_symbols
,
3007 std::vector
<Symbol
*>* non_got_symbols
,
3008 std::vector
<Symbol
*>* got_symbols
)
3010 for (std::vector
<Symbol
*>::iterator p
= dyn_symbols
->begin();
3011 p
!= dyn_symbols
->end();
3014 Mips_symbol
<size
>* mips_sym
= Mips_symbol
<size
>::as_mips_sym(*p
);
3015 if (mips_sym
->global_got_area() == GGA_NORMAL
3016 || mips_sym
->global_got_area() == GGA_RELOC_ONLY
)
3017 got_symbols
->push_back(mips_sym
);
3019 non_got_symbols
->push_back(mips_sym
);
3022 std::sort(got_symbols
->begin(), got_symbols
->end(),
3023 got_offset_compare
<size
, big_endian
>);
3026 // Functor class for processing the global symbol table.
3028 template<int size
, bool big_endian
>
3029 class Symbol_visitor_check_symbols
3032 Symbol_visitor_check_symbols(Target_mips
<size
, big_endian
>* target
,
3033 Layout
* layout
, Symbol_table
* symtab
)
3034 : target_(target
), layout_(layout
), symtab_(symtab
)
3038 operator()(Sized_symbol
<size
>* sym
)
3040 Mips_symbol
<size
>* mips_sym
= Mips_symbol
<size
>::as_mips_sym(sym
);
3041 if (local_pic_function
<size
, big_endian
>(mips_sym
))
3043 // SYM is a function that might need $25 to be valid on entry.
3044 // If we're creating a non-PIC relocatable object, mark SYM as
3045 // being PIC. If we're creating a non-relocatable object with
3046 // non-PIC branches and jumps to SYM, make sure that SYM has an la25
3048 if (parameters
->options().relocatable())
3050 if (!parameters
->options().output_is_position_independent())
3051 mips_sym
->set_pic();
3053 else if (mips_sym
->has_nonpic_branches())
3055 this->target_
->la25_stub_section(layout_
)
3056 ->create_la25_stub(this->symtab_
, this->target_
, mips_sym
);
3062 Target_mips
<size
, big_endian
>* target_
;
3064 Symbol_table
* symtab_
;
3067 // Relocation types, parameterized by SHT_REL vs. SHT_RELA, size,
3068 // and endianness. The relocation format for MIPS-64 is non-standard.
3070 template<int sh_type
, int size
, bool big_endian
>
3071 struct Mips_reloc_types
;
3073 template<bool big_endian
>
3074 struct Mips_reloc_types
<elfcpp::SHT_REL
, 32, big_endian
>
3076 typedef typename
elfcpp::Rel
<32, big_endian
> Reloc
;
3077 typedef typename
elfcpp::Rel_write
<32, big_endian
> Reloc_write
;
3079 static typename
elfcpp::Elf_types
<32>::Elf_Swxword
3080 get_r_addend(const Reloc
*)
3084 set_reloc_addend(Reloc_write
*,
3085 typename
elfcpp::Elf_types
<32>::Elf_Swxword
)
3086 { gold_unreachable(); }
3089 template<bool big_endian
>
3090 struct Mips_reloc_types
<elfcpp::SHT_RELA
, 32, big_endian
>
3092 typedef typename
elfcpp::Rela
<32, big_endian
> Reloc
;
3093 typedef typename
elfcpp::Rela_write
<32, big_endian
> Reloc_write
;
3095 static typename
elfcpp::Elf_types
<32>::Elf_Swxword
3096 get_r_addend(const Reloc
* reloc
)
3097 { return reloc
->get_r_addend(); }
3100 set_reloc_addend(Reloc_write
* p
,
3101 typename
elfcpp::Elf_types
<32>::Elf_Swxword val
)
3102 { p
->put_r_addend(val
); }
3105 template<bool big_endian
>
3106 struct Mips_reloc_types
<elfcpp::SHT_REL
, 64, big_endian
>
3108 typedef typename
elfcpp::Mips64_rel
<big_endian
> Reloc
;
3109 typedef typename
elfcpp::Mips64_rel_write
<big_endian
> Reloc_write
;
3111 static typename
elfcpp::Elf_types
<64>::Elf_Swxword
3112 get_r_addend(const Reloc
*)
3116 set_reloc_addend(Reloc_write
*,
3117 typename
elfcpp::Elf_types
<64>::Elf_Swxword
)
3118 { gold_unreachable(); }
3121 template<bool big_endian
>
3122 struct Mips_reloc_types
<elfcpp::SHT_RELA
, 64, big_endian
>
3124 typedef typename
elfcpp::Mips64_rela
<big_endian
> Reloc
;
3125 typedef typename
elfcpp::Mips64_rela_write
<big_endian
> Reloc_write
;
3127 static typename
elfcpp::Elf_types
<64>::Elf_Swxword
3128 get_r_addend(const Reloc
* reloc
)
3129 { return reloc
->get_r_addend(); }
3132 set_reloc_addend(Reloc_write
* p
,
3133 typename
elfcpp::Elf_types
<64>::Elf_Swxword val
)
3134 { p
->put_r_addend(val
); }
3137 // Forward declaration.
3139 mips_get_size_for_reloc(unsigned int, Relobj
*);
3141 // A class for inquiring about properties of a relocation,
3142 // used while scanning relocs during a relocatable link and
3143 // garbage collection.
3145 template<int sh_type_
, int size
, bool big_endian
>
3146 class Mips_classify_reloc
;
3148 template<int sh_type_
, bool big_endian
>
3149 class Mips_classify_reloc
<sh_type_
, 32, big_endian
> :
3150 public gold::Default_classify_reloc
<sh_type_
, 32, big_endian
>
3153 typedef typename Mips_reloc_types
<sh_type_
, 32, big_endian
>::Reloc
3155 typedef typename Mips_reloc_types
<sh_type_
, 32, big_endian
>::Reloc_write
3158 // Return the symbol referred to by the relocation.
3159 static inline unsigned int
3160 get_r_sym(const Reltype
* reloc
)
3161 { return elfcpp::elf_r_sym
<32>(reloc
->get_r_info()); }
3163 // Return the type of the relocation.
3164 static inline unsigned int
3165 get_r_type(const Reltype
* reloc
)
3166 { return elfcpp::elf_r_type
<32>(reloc
->get_r_info()); }
3168 static inline unsigned int
3169 get_r_type2(const Reltype
*)
3172 static inline unsigned int
3173 get_r_type3(const Reltype
*)
3176 static inline unsigned int
3177 get_r_ssym(const Reltype
*)
3180 // Return the explicit addend of the relocation (return 0 for SHT_REL).
3181 static inline unsigned int
3182 get_r_addend(const Reltype
* reloc
)
3184 if (sh_type_
== elfcpp::SHT_REL
)
3186 return Mips_reloc_types
<sh_type_
, 32, big_endian
>::get_r_addend(reloc
);
3189 // Write the r_info field to a new reloc, using the r_info field from
3190 // the original reloc, replacing the r_sym field with R_SYM.
3192 put_r_info(Reltype_write
* new_reloc
, Reltype
* reloc
, unsigned int r_sym
)
3194 unsigned int r_type
= elfcpp::elf_r_type
<32>(reloc
->get_r_info());
3195 new_reloc
->put_r_info(elfcpp::elf_r_info
<32>(r_sym
, r_type
));
3198 // Write the r_addend field to a new reloc.
3200 put_r_addend(Reltype_write
* to
,
3201 typename
elfcpp::Elf_types
<32>::Elf_Swxword addend
)
3202 { Mips_reloc_types
<sh_type_
, 32, big_endian
>::set_reloc_addend(to
, addend
); }
3204 // Return the size of the addend of the relocation (only used for SHT_REL).
3206 get_size_for_reloc(unsigned int r_type
, Relobj
* obj
)
3207 { return mips_get_size_for_reloc(r_type
, obj
); }
3210 template<int sh_type_
, bool big_endian
>
3211 class Mips_classify_reloc
<sh_type_
, 64, big_endian
> :
3212 public gold::Default_classify_reloc
<sh_type_
, 64, big_endian
>
3215 typedef typename Mips_reloc_types
<sh_type_
, 64, big_endian
>::Reloc
3217 typedef typename Mips_reloc_types
<sh_type_
, 64, big_endian
>::Reloc_write
3220 // Return the symbol referred to by the relocation.
3221 static inline unsigned int
3222 get_r_sym(const Reltype
* reloc
)
3223 { return reloc
->get_r_sym(); }
3225 // Return the r_type of the relocation.
3226 static inline unsigned int
3227 get_r_type(const Reltype
* reloc
)
3228 { return reloc
->get_r_type(); }
3230 // Return the r_type2 of the relocation.
3231 static inline unsigned int
3232 get_r_type2(const Reltype
* reloc
)
3233 { return reloc
->get_r_type2(); }
3235 // Return the r_type3 of the relocation.
3236 static inline unsigned int
3237 get_r_type3(const Reltype
* reloc
)
3238 { return reloc
->get_r_type3(); }
3240 // Return the special symbol of the relocation.
3241 static inline unsigned int
3242 get_r_ssym(const Reltype
* reloc
)
3243 { return reloc
->get_r_ssym(); }
3245 // Return the explicit addend of the relocation (return 0 for SHT_REL).
3246 static inline typename
elfcpp::Elf_types
<64>::Elf_Swxword
3247 get_r_addend(const Reltype
* reloc
)
3249 if (sh_type_
== elfcpp::SHT_REL
)
3251 return Mips_reloc_types
<sh_type_
, 64, big_endian
>::get_r_addend(reloc
);
3254 // Write the r_info field to a new reloc, using the r_info field from
3255 // the original reloc, replacing the r_sym field with R_SYM.
3257 put_r_info(Reltype_write
* new_reloc
, Reltype
* reloc
, unsigned int r_sym
)
3259 new_reloc
->put_r_sym(r_sym
);
3260 new_reloc
->put_r_ssym(reloc
->get_r_ssym());
3261 new_reloc
->put_r_type3(reloc
->get_r_type3());
3262 new_reloc
->put_r_type2(reloc
->get_r_type2());
3263 new_reloc
->put_r_type(reloc
->get_r_type());
3266 // Write the r_addend field to a new reloc.
3268 put_r_addend(Reltype_write
* to
,
3269 typename
elfcpp::Elf_types
<64>::Elf_Swxword addend
)
3270 { Mips_reloc_types
<sh_type_
, 64, big_endian
>::set_reloc_addend(to
, addend
); }
3272 // Return the size of the addend of the relocation (only used for SHT_REL).
3274 get_size_for_reloc(unsigned int r_type
, Relobj
* obj
)
3275 { return mips_get_size_for_reloc(r_type
, obj
); }
3278 template<int size
, bool big_endian
>
3279 class Target_mips
: public Sized_target
<size
, big_endian
>
3281 typedef typename
elfcpp::Elf_types
<size
>::Elf_Addr Mips_address
;
3282 typedef Mips_output_data_reloc
<elfcpp::SHT_REL
, true, size
, big_endian
>
3284 typedef typename
elfcpp::Swap
<32, big_endian
>::Valtype Valtype32
;
3285 typedef typename
elfcpp::Swap
<size
, big_endian
>::Valtype Valtype
;
3286 typedef typename Mips_reloc_types
<elfcpp::SHT_REL
, size
, big_endian
>::Reloc
3288 typedef typename Mips_reloc_types
<elfcpp::SHT_RELA
, size
, big_endian
>::Reloc
3292 Target_mips(const Target::Target_info
* info
= &mips_info
)
3293 : Sized_target
<size
, big_endian
>(info
), got_(NULL
), gp_(NULL
), plt_(NULL
),
3294 got_plt_(NULL
), rel_dyn_(NULL
), rld_map_(NULL
), copy_relocs_(),
3295 dyn_relocs_(), la25_stub_(NULL
), mips_mach_extensions_(),
3296 mips_stubs_(NULL
), attributes_section_data_(NULL
), abiflags_(NULL
),
3297 mach_(0), layout_(NULL
), got16_addends_(), has_abiflags_section_(false),
3298 entry_symbol_is_compressed_(false), insn32_(false)
3300 this->add_machine_extensions();
3303 // The offset of $gp from the beginning of the .got section.
3304 static const unsigned int MIPS_GP_OFFSET
= 0x7ff0;
3306 // The maximum size of the GOT for it to be addressable using 16-bit
3307 // offsets from $gp.
3308 static const unsigned int MIPS_GOT_MAX_SIZE
= MIPS_GP_OFFSET
+ 0x7fff;
3310 // Make a new symbol table entry for the Mips target.
3312 make_symbol(const char*, elfcpp::STT
, Object
*, unsigned int, uint64_t)
3313 { return new Mips_symbol
<size
>(); }
3315 // Process the relocations to determine unreferenced sections for
3316 // garbage collection.
3318 gc_process_relocs(Symbol_table
* symtab
,
3320 Sized_relobj_file
<size
, big_endian
>* object
,
3321 unsigned int data_shndx
,
3322 unsigned int sh_type
,
3323 const unsigned char* prelocs
,
3325 Output_section
* output_section
,
3326 bool needs_special_offset_handling
,
3327 size_t local_symbol_count
,
3328 const unsigned char* plocal_symbols
);
3330 // Scan the relocations to look for symbol adjustments.
3332 scan_relocs(Symbol_table
* symtab
,
3334 Sized_relobj_file
<size
, big_endian
>* object
,
3335 unsigned int data_shndx
,
3336 unsigned int sh_type
,
3337 const unsigned char* prelocs
,
3339 Output_section
* output_section
,
3340 bool needs_special_offset_handling
,
3341 size_t local_symbol_count
,
3342 const unsigned char* plocal_symbols
);
3344 // Finalize the sections.
3346 do_finalize_sections(Layout
*, const Input_objects
*, Symbol_table
*);
3348 // Relocate a section.
3350 relocate_section(const Relocate_info
<size
, big_endian
>*,
3351 unsigned int sh_type
,
3352 const unsigned char* prelocs
,
3354 Output_section
* output_section
,
3355 bool needs_special_offset_handling
,
3356 unsigned char* view
,
3357 Mips_address view_address
,
3358 section_size_type view_size
,
3359 const Reloc_symbol_changes
*);
3361 // Scan the relocs during a relocatable link.
3363 scan_relocatable_relocs(Symbol_table
* symtab
,
3365 Sized_relobj_file
<size
, big_endian
>* object
,
3366 unsigned int data_shndx
,
3367 unsigned int sh_type
,
3368 const unsigned char* prelocs
,
3370 Output_section
* output_section
,
3371 bool needs_special_offset_handling
,
3372 size_t local_symbol_count
,
3373 const unsigned char* plocal_symbols
,
3374 Relocatable_relocs
*);
3376 // Scan the relocs for --emit-relocs.
3378 emit_relocs_scan(Symbol_table
* symtab
,
3380 Sized_relobj_file
<size
, big_endian
>* object
,
3381 unsigned int data_shndx
,
3382 unsigned int sh_type
,
3383 const unsigned char* prelocs
,
3385 Output_section
* output_section
,
3386 bool needs_special_offset_handling
,
3387 size_t local_symbol_count
,
3388 const unsigned char* plocal_syms
,
3389 Relocatable_relocs
* rr
);
3391 // Emit relocations for a section.
3393 relocate_relocs(const Relocate_info
<size
, big_endian
>*,
3394 unsigned int sh_type
,
3395 const unsigned char* prelocs
,
3397 Output_section
* output_section
,
3398 typename
elfcpp::Elf_types
<size
>::Elf_Off
3399 offset_in_output_section
,
3400 unsigned char* view
,
3401 Mips_address view_address
,
3402 section_size_type view_size
,
3403 unsigned char* reloc_view
,
3404 section_size_type reloc_view_size
);
3406 // Perform target-specific processing in a relocatable link. This is
3407 // only used if we use the relocation strategy RELOC_SPECIAL.
3409 relocate_special_relocatable(const Relocate_info
<size
, big_endian
>* relinfo
,
3410 unsigned int sh_type
,
3411 const unsigned char* preloc_in
,
3413 Output_section
* output_section
,
3414 typename
elfcpp::Elf_types
<size
>::Elf_Off
3415 offset_in_output_section
,
3416 unsigned char* view
,
3417 Mips_address view_address
,
3418 section_size_type view_size
,
3419 unsigned char* preloc_out
);
3421 // Return whether SYM is defined by the ABI.
3423 do_is_defined_by_abi(const Symbol
* sym
) const
3425 return ((strcmp(sym
->name(), "__gnu_local_gp") == 0)
3426 || (strcmp(sym
->name(), "_gp_disp") == 0)
3427 || (strcmp(sym
->name(), "___tls_get_addr") == 0));
3430 // Return the number of entries in the GOT.
3432 got_entry_count() const
3434 if (!this->has_got_section())
3436 return this->got_size() / (size
/8);
3439 // Return the number of entries in the PLT.
3441 plt_entry_count() const
3443 if (this->plt_
== NULL
)
3445 return this->plt_
->entry_count();
3448 // Return the offset of the first non-reserved PLT entry.
3450 first_plt_entry_offset() const
3451 { return this->plt_
->first_plt_entry_offset(); }
3453 // Return the size of each PLT entry.
3455 plt_entry_size() const
3456 { return this->plt_
->plt_entry_size(); }
3458 // Get the GOT section, creating it if necessary.
3459 Mips_output_data_got
<size
, big_endian
>*
3460 got_section(Symbol_table
*, Layout
*);
3462 // Get the GOT section.
3463 Mips_output_data_got
<size
, big_endian
>*
3466 gold_assert(this->got_
!= NULL
);
3470 // Get the .MIPS.stubs section, creating it if necessary.
3471 Mips_output_data_mips_stubs
<size
, big_endian
>*
3472 mips_stubs_section(Layout
* layout
);
3474 // Get the .MIPS.stubs section.
3475 Mips_output_data_mips_stubs
<size
, big_endian
>*
3476 mips_stubs_section() const
3478 gold_assert(this->mips_stubs_
!= NULL
);
3479 return this->mips_stubs_
;
3482 // Get the LA25 stub section, creating it if necessary.
3483 Mips_output_data_la25_stub
<size
, big_endian
>*
3484 la25_stub_section(Layout
*);
3486 // Get the LA25 stub section.
3487 Mips_output_data_la25_stub
<size
, big_endian
>*
3490 gold_assert(this->la25_stub_
!= NULL
);
3491 return this->la25_stub_
;
3494 // Get gp value. It has the value of .got + 0x7FF0.
3498 if (this->gp_
!= NULL
)
3499 return this->gp_
->value();
3503 // Get gp value. It has the value of .got + 0x7FF0. Adjust it for
3504 // multi-GOT links so that OBJECT's GOT + 0x7FF0 is returned.
3506 adjusted_gp_value(const Mips_relobj
<size
, big_endian
>* object
)
3508 if (this->gp_
== NULL
)
3511 bool multi_got
= false;
3512 if (this->has_got_section())
3513 multi_got
= this->got_section()->multi_got();
3515 return this->gp_
->value();
3517 return this->gp_
->value() + this->got_section()->get_got_offset(object
);
3520 // Get the dynamic reloc section, creating it if necessary.
3522 rel_dyn_section(Layout
*);
3525 do_has_custom_set_dynsym_indexes() const
3528 // Don't emit input .reginfo/.MIPS.abiflags sections to
3529 // output .reginfo/.MIPS.abiflags.
3531 do_should_include_section(elfcpp::Elf_Word sh_type
) const
3533 return ((sh_type
!= elfcpp::SHT_MIPS_REGINFO
)
3534 && (sh_type
!= elfcpp::SHT_MIPS_ABIFLAGS
));
3537 // Set the dynamic symbol indexes. INDEX is the index of the first
3538 // global dynamic symbol. Pointers to the symbols are stored into the
3539 // vector SYMS. The names are added to DYNPOOL. This returns an
3540 // updated dynamic symbol index.
3542 do_set_dynsym_indexes(std::vector
<Symbol
*>* dyn_symbols
, unsigned int index
,
3543 std::vector
<Symbol
*>* syms
, Stringpool
* dynpool
,
3544 Versions
* versions
, Symbol_table
* symtab
) const;
3546 // Remove .MIPS.stubs entry for a symbol.
3548 remove_lazy_stub_entry(Mips_symbol
<size
>* sym
)
3550 if (this->mips_stubs_
!= NULL
)
3551 this->mips_stubs_
->remove_entry(sym
);
3554 // The value to write into got[1] for SVR4 targets, to identify it is
3555 // a GNU object. The dynamic linker can then use got[1] to store the
3558 mips_elf_gnu_got1_mask()
3560 if (this->is_output_n64())
3561 return (uint64_t)1 << 63;
3566 // Whether the output has microMIPS code. This is valid only after
3567 // merge_obj_e_flags() is called.
3569 is_output_micromips() const
3571 gold_assert(this->are_processor_specific_flags_set());
3572 return elfcpp::is_micromips(this->processor_specific_flags());
3575 // Whether the output uses N32 ABI. This is valid only after
3576 // merge_obj_e_flags() is called.
3578 is_output_n32() const
3580 gold_assert(this->are_processor_specific_flags_set());
3581 return elfcpp::abi_n32(this->processor_specific_flags());
3584 // Whether the output uses R6 ISA. This is valid only after
3585 // merge_obj_e_flags() is called.
3587 is_output_r6() const
3589 gold_assert(this->are_processor_specific_flags_set());
3590 return elfcpp::r6_isa(this->processor_specific_flags());
3593 // Whether the output uses N64 ABI.
3595 is_output_n64() const
3596 { return size
== 64; }
3598 // Whether the output uses NEWABI. This is valid only after
3599 // merge_obj_e_flags() is called.
3601 is_output_newabi() const
3602 { return this->is_output_n32() || this->is_output_n64(); }
3604 // Whether we can only use 32-bit microMIPS instructions.
3606 use_32bit_micromips_instructions() const
3607 { return this->insn32_
; }
3609 // Return the r_sym field from a relocation.
3611 get_r_sym(const unsigned char* preloc
) const
3613 // Since REL and RELA relocs share the same structure through
3614 // the r_info field, we can just use REL here.
3615 Reltype
rel(preloc
);
3616 return Mips_classify_reloc
<elfcpp::SHT_REL
, size
, big_endian
>::
3621 // Return the value to use for a dynamic symbol which requires special
3622 // treatment. This is how we support equality comparisons of function
3623 // pointers across shared library boundaries, as described in the
3624 // processor specific ABI supplement.
3626 do_dynsym_value(const Symbol
* gsym
) const;
3628 // Make an ELF object.
3630 do_make_elf_object(const std::string
&, Input_file
*, off_t
,
3631 const elfcpp::Ehdr
<size
, big_endian
>& ehdr
);
3634 do_make_elf_object(const std::string
&, Input_file
*, off_t
,
3635 const elfcpp::Ehdr
<size
, !big_endian
>&)
3636 { gold_unreachable(); }
3638 // Adjust ELF file header.
3640 do_adjust_elf_header(unsigned char* view
, int len
);
3642 // Get the custom dynamic tag value.
3644 do_dynamic_tag_custom_value(elfcpp::DT
) const;
3646 // Adjust the value written to the dynamic symbol table.
3648 do_adjust_dyn_symbol(const Symbol
* sym
, unsigned char* view
) const
3650 elfcpp::Sym
<size
, big_endian
> isym(view
);
3651 elfcpp::Sym_write
<size
, big_endian
> osym(view
);
3652 const Mips_symbol
<size
>* mips_sym
= Mips_symbol
<size
>::as_mips_sym(sym
);
3654 // Keep dynamic compressed symbols odd. This allows the dynamic linker
3655 // to treat compressed symbols like any other.
3656 Mips_address value
= isym
.get_st_value();
3657 if (mips_sym
->is_mips16() && value
!= 0)
3659 if (!mips_sym
->has_mips16_fn_stub())
3663 // If we have a MIPS16 function with a stub, the dynamic symbol
3664 // must refer to the stub, since only the stub uses the standard
3665 // calling conventions. Stub contains MIPS32 code, so don't add +1
3668 // There is a code which does this in the method
3669 // Target_mips::do_dynsym_value, but that code will only be
3670 // executed if the symbol is from dynobj.
3671 // TODO(sasa): GNU ld also changes the value in non-dynamic symbol
3674 Mips16_stub_section
<size
, big_endian
>* fn_stub
=
3675 mips_sym
->template get_mips16_fn_stub
<big_endian
>();
3676 value
= fn_stub
->output_address();
3677 osym
.put_st_size(fn_stub
->section_size());
3680 osym
.put_st_value(value
);
3681 osym
.put_st_other(elfcpp::elf_st_other(sym
->visibility(),
3682 mips_sym
->nonvis() - (elfcpp::STO_MIPS16
>> 2)));
3684 else if ((mips_sym
->is_micromips()
3685 // Stubs are always microMIPS if there is any microMIPS code in
3687 || (this->is_output_micromips() && mips_sym
->has_lazy_stub()))
3690 osym
.put_st_value(value
| 1);
3691 osym
.put_st_other(elfcpp::elf_st_other(sym
->visibility(),
3692 mips_sym
->nonvis() - (elfcpp::STO_MICROMIPS
>> 2)));
3697 // The class which scans relocations.
3705 get_reference_flags(unsigned int r_type
);
3708 local(Symbol_table
* symtab
, Layout
* layout
, Target_mips
* target
,
3709 Sized_relobj_file
<size
, big_endian
>* object
,
3710 unsigned int data_shndx
,
3711 Output_section
* output_section
,
3712 const Reltype
& reloc
, unsigned int r_type
,
3713 const elfcpp::Sym
<size
, big_endian
>& lsym
,
3717 local(Symbol_table
* symtab
, Layout
* layout
, Target_mips
* target
,
3718 Sized_relobj_file
<size
, big_endian
>* object
,
3719 unsigned int data_shndx
,
3720 Output_section
* output_section
,
3721 const Relatype
& reloc
, unsigned int r_type
,
3722 const elfcpp::Sym
<size
, big_endian
>& lsym
,
3726 local(Symbol_table
* symtab
, Layout
* layout
, Target_mips
* target
,
3727 Sized_relobj_file
<size
, big_endian
>* object
,
3728 unsigned int data_shndx
,
3729 Output_section
* output_section
,
3730 const Relatype
* rela
,
3732 unsigned int rel_type
,
3733 unsigned int r_type
,
3734 const elfcpp::Sym
<size
, big_endian
>& lsym
,
3738 global(Symbol_table
* symtab
, Layout
* layout
, Target_mips
* target
,
3739 Sized_relobj_file
<size
, big_endian
>* object
,
3740 unsigned int data_shndx
,
3741 Output_section
* output_section
,
3742 const Reltype
& reloc
, unsigned int r_type
,
3746 global(Symbol_table
* symtab
, Layout
* layout
, Target_mips
* target
,
3747 Sized_relobj_file
<size
, big_endian
>* object
,
3748 unsigned int data_shndx
,
3749 Output_section
* output_section
,
3750 const Relatype
& reloc
, unsigned int r_type
,
3754 global(Symbol_table
* symtab
, Layout
* layout
, Target_mips
* target
,
3755 Sized_relobj_file
<size
, big_endian
>* object
,
3756 unsigned int data_shndx
,
3757 Output_section
* output_section
,
3758 const Relatype
* rela
,
3760 unsigned int rel_type
,
3761 unsigned int r_type
,
3765 local_reloc_may_be_function_pointer(Symbol_table
* , Layout
*,
3767 Sized_relobj_file
<size
, big_endian
>*,
3772 const elfcpp::Sym
<size
, big_endian
>&)
3776 global_reloc_may_be_function_pointer(Symbol_table
*, Layout
*,
3778 Sized_relobj_file
<size
, big_endian
>*,
3782 unsigned int, Symbol
*)
3786 local_reloc_may_be_function_pointer(Symbol_table
*, Layout
*,
3788 Sized_relobj_file
<size
, big_endian
>*,
3793 const elfcpp::Sym
<size
, big_endian
>&)
3797 global_reloc_may_be_function_pointer(Symbol_table
*, Layout
*,
3799 Sized_relobj_file
<size
, big_endian
>*,
3803 unsigned int, Symbol
*)
3807 unsupported_reloc_local(Sized_relobj_file
<size
, big_endian
>*,
3808 unsigned int r_type
);
3811 unsupported_reloc_global(Sized_relobj_file
<size
, big_endian
>*,
3812 unsigned int r_type
, Symbol
*);
3815 // The class which implements relocation.
3825 // Return whether a R_MIPS_32/R_MIPS_64 relocation needs to be applied.
3827 should_apply_static_reloc(const Mips_symbol
<size
>* gsym
,
3828 unsigned int r_type
,
3829 Output_section
* output_section
,
3830 Target_mips
* target
);
3832 // Do a relocation. Return false if the caller should not issue
3833 // any warnings about this relocation.
3835 relocate(const Relocate_info
<size
, big_endian
>*, unsigned int,
3836 Target_mips
*, Output_section
*, size_t, const unsigned char*,
3837 const Sized_symbol
<size
>*, const Symbol_value
<size
>*,
3838 unsigned char*, Mips_address
, section_size_type
);
3841 // This POD class holds the dynamic relocations that should be emitted instead
3842 // of R_MIPS_32, R_MIPS_REL32 and R_MIPS_64 relocations. We will emit these
3843 // relocations if it turns out that the symbol does not have static
3848 Dyn_reloc(Mips_symbol
<size
>* sym
, unsigned int r_type
,
3849 Mips_relobj
<size
, big_endian
>* relobj
, unsigned int shndx
,
3850 Output_section
* output_section
, Mips_address r_offset
)
3851 : sym_(sym
), r_type_(r_type
), relobj_(relobj
),
3852 shndx_(shndx
), output_section_(output_section
),
3856 // Emit this reloc if appropriate. This is called after we have
3857 // scanned all the relocations, so we know whether the symbol has
3858 // static relocations.
3860 emit(Reloc_section
* rel_dyn
, Mips_output_data_got
<size
, big_endian
>* got
,
3861 Symbol_table
* symtab
)
3863 if (!this->sym_
->has_static_relocs())
3865 got
->record_global_got_symbol(this->sym_
, this->relobj_
,
3866 this->r_type_
, true, false);
3867 if (!symbol_references_local(this->sym_
,
3868 this->sym_
->should_add_dynsym_entry(symtab
)))
3869 rel_dyn
->add_global(this->sym_
, this->r_type_
,
3870 this->output_section_
, this->relobj_
,
3871 this->shndx_
, this->r_offset_
);
3873 rel_dyn
->add_symbolless_global_addend(this->sym_
, this->r_type_
,
3874 this->output_section_
, this->relobj_
,
3875 this->shndx_
, this->r_offset_
);
3880 Mips_symbol
<size
>* sym_
;
3881 unsigned int r_type_
;
3882 Mips_relobj
<size
, big_endian
>* relobj_
;
3883 unsigned int shndx_
;
3884 Output_section
* output_section_
;
3885 Mips_address r_offset_
;
3888 // Adjust TLS relocation type based on the options and whether this
3889 // is a local symbol.
3890 static tls::Tls_optimization
3891 optimize_tls_reloc(bool is_final
, int r_type
);
3893 // Return whether there is a GOT section.
3895 has_got_section() const
3896 { return this->got_
!= NULL
; }
3898 // Check whether the given ELF header flags describe a 32-bit binary.
3900 mips_32bit_flags(elfcpp::Elf_Word
);
3903 mach_mips3000
= 3000,
3904 mach_mips3900
= 3900,
3905 mach_mips4000
= 4000,
3906 mach_mips4010
= 4010,
3907 mach_mips4100
= 4100,
3908 mach_mips4111
= 4111,
3909 mach_mips4120
= 4120,
3910 mach_mips4300
= 4300,
3911 mach_mips4400
= 4400,
3912 mach_mips4600
= 4600,
3913 mach_mips4650
= 4650,
3914 mach_mips5000
= 5000,
3915 mach_mips5400
= 5400,
3916 mach_mips5500
= 5500,
3917 mach_mips5900
= 5900,
3918 mach_mips6000
= 6000,
3919 mach_mips7000
= 7000,
3920 mach_mips8000
= 8000,
3921 mach_mips9000
= 9000,
3922 mach_mips10000
= 10000,
3923 mach_mips12000
= 12000,
3924 mach_mips14000
= 14000,
3925 mach_mips16000
= 16000,
3928 mach_mips_loongson_2e
= 3001,
3929 mach_mips_loongson_2f
= 3002,
3930 mach_mips_loongson_3a
= 3003,
3931 mach_mips_sb1
= 12310201, // octal 'SB', 01
3932 mach_mips_octeon
= 6501,
3933 mach_mips_octeonp
= 6601,
3934 mach_mips_octeon2
= 6502,
3935 mach_mips_octeon3
= 6503,
3936 mach_mips_xlr
= 887682, // decimal 'XLR'
3937 mach_mipsisa32
= 32,
3938 mach_mipsisa32r2
= 33,
3939 mach_mipsisa32r3
= 34,
3940 mach_mipsisa32r5
= 36,
3941 mach_mipsisa32r6
= 37,
3942 mach_mipsisa64
= 64,
3943 mach_mipsisa64r2
= 65,
3944 mach_mipsisa64r3
= 66,
3945 mach_mipsisa64r5
= 68,
3946 mach_mipsisa64r6
= 69,
3947 mach_mips_micromips
= 96
3950 // Return the MACH for a MIPS e_flags value.
3952 elf_mips_mach(elfcpp::Elf_Word
);
3954 // Return the MACH for each .MIPS.abiflags ISA Extension.
3956 mips_isa_ext_mach(unsigned int);
3958 // Return the .MIPS.abiflags value representing each ISA Extension.
3960 mips_isa_ext(unsigned int);
3962 // Update the isa_level, isa_rev, isa_ext fields of abiflags.
3964 update_abiflags_isa(const std::string
&, elfcpp::Elf_Word
,
3965 Mips_abiflags
<big_endian
>*);
3967 // Infer the content of the ABI flags based on the elf header.
3969 infer_abiflags(Mips_relobj
<size
, big_endian
>*, Mips_abiflags
<big_endian
>*);
3971 // Create abiflags from elf header or from .MIPS.abiflags section.
3973 create_abiflags(Mips_relobj
<size
, big_endian
>*, Mips_abiflags
<big_endian
>*);
3975 // Return the meaning of fp_abi, or "unknown" if not known.
3981 select_fp_abi(const std::string
&, int, int);
3983 // Merge attributes from input object.
3985 merge_obj_attributes(const std::string
&, const Attributes_section_data
*);
3987 // Merge abiflags from input object.
3989 merge_obj_abiflags(const std::string
&, Mips_abiflags
<big_endian
>*);
3991 // Check whether machine EXTENSION is an extension of machine BASE.
3993 mips_mach_extends(unsigned int, unsigned int);
3995 // Merge file header flags from input object.
3997 merge_obj_e_flags(const std::string
&, elfcpp::Elf_Word
);
3999 // Encode ISA level and revision as a single value.
4001 level_rev(unsigned char isa_level
, unsigned char isa_rev
) const
4002 { return (isa_level
<< 3) | isa_rev
; }
4004 // True if we are linking for CPUs that are faster if JAL is converted to BAL.
4009 // True if we are linking for CPUs that are faster if JALR is converted to
4010 // BAL. This should be safe for all architectures. We enable this predicate
4016 // True if we are linking for CPUs that are faster if JR is converted to B.
4017 // This should be safe for all architectures. We enable this predicate for
4023 // Return the size of the GOT section.
4027 gold_assert(this->got_
!= NULL
);
4028 return this->got_
->data_size();
4031 // Create a PLT entry for a global symbol referenced by r_type relocation.
4033 make_plt_entry(Symbol_table
*, Layout
*, Mips_symbol
<size
>*,
4034 unsigned int r_type
);
4036 // Get the PLT section.
4037 Mips_output_data_plt
<size
, big_endian
>*
4040 gold_assert(this->plt_
!= NULL
);
4044 // Get the GOT PLT section.
4045 const Mips_output_data_plt
<size
, big_endian
>*
4046 got_plt_section() const
4048 gold_assert(this->got_plt_
!= NULL
);
4049 return this->got_plt_
;
4052 // Copy a relocation against a global symbol.
4054 copy_reloc(Symbol_table
* symtab
, Layout
* layout
,
4055 Sized_relobj_file
<size
, big_endian
>* object
,
4056 unsigned int shndx
, Output_section
* output_section
,
4057 Symbol
* sym
, unsigned int r_type
, Mips_address r_offset
)
4059 this->copy_relocs_
.copy_reloc(symtab
, layout
,
4060 symtab
->get_sized_symbol
<size
>(sym
),
4061 object
, shndx
, output_section
,
4062 r_type
, r_offset
, 0,
4063 this->rel_dyn_section(layout
));
4067 dynamic_reloc(Mips_symbol
<size
>* sym
, unsigned int r_type
,
4068 Mips_relobj
<size
, big_endian
>* relobj
,
4069 unsigned int shndx
, Output_section
* output_section
,
4070 Mips_address r_offset
)
4072 this->dyn_relocs_
.push_back(Dyn_reloc(sym
, r_type
, relobj
, shndx
,
4073 output_section
, r_offset
));
4076 // Calculate value of _gp symbol.
4078 set_gp(Layout
*, Symbol_table
*);
4081 elf_mips_abi_name(elfcpp::Elf_Word e_flags
);
4083 elf_mips_mach_name(elfcpp::Elf_Word e_flags
);
4085 // Adds entries that describe how machines relate to one another. The entries
4086 // are ordered topologically with MIPS I extensions listed last. First
4087 // element is extension, second element is base.
4089 add_machine_extensions()
4091 // MIPS64r2 extensions.
4092 this->add_extension(mach_mips_octeon3
, mach_mips_octeon2
);
4093 this->add_extension(mach_mips_octeon2
, mach_mips_octeonp
);
4094 this->add_extension(mach_mips_octeonp
, mach_mips_octeon
);
4095 this->add_extension(mach_mips_octeon
, mach_mipsisa64r2
);
4096 this->add_extension(mach_mips_loongson_3a
, mach_mipsisa64r2
);
4098 // MIPS64 extensions.
4099 this->add_extension(mach_mipsisa64r2
, mach_mipsisa64
);
4100 this->add_extension(mach_mips_sb1
, mach_mipsisa64
);
4101 this->add_extension(mach_mips_xlr
, mach_mipsisa64
);
4103 // MIPS V extensions.
4104 this->add_extension(mach_mipsisa64
, mach_mips5
);
4106 // R10000 extensions.
4107 this->add_extension(mach_mips12000
, mach_mips10000
);
4108 this->add_extension(mach_mips14000
, mach_mips10000
);
4109 this->add_extension(mach_mips16000
, mach_mips10000
);
4111 // R5000 extensions. Note: the vr5500 ISA is an extension of the core
4112 // vr5400 ISA, but doesn't include the multimedia stuff. It seems
4113 // better to allow vr5400 and vr5500 code to be merged anyway, since
4114 // many libraries will just use the core ISA. Perhaps we could add
4115 // some sort of ASE flag if this ever proves a problem.
4116 this->add_extension(mach_mips5500
, mach_mips5400
);
4117 this->add_extension(mach_mips5400
, mach_mips5000
);
4119 // MIPS IV extensions.
4120 this->add_extension(mach_mips5
, mach_mips8000
);
4121 this->add_extension(mach_mips10000
, mach_mips8000
);
4122 this->add_extension(mach_mips5000
, mach_mips8000
);
4123 this->add_extension(mach_mips7000
, mach_mips8000
);
4124 this->add_extension(mach_mips9000
, mach_mips8000
);
4126 // VR4100 extensions.
4127 this->add_extension(mach_mips4120
, mach_mips4100
);
4128 this->add_extension(mach_mips4111
, mach_mips4100
);
4130 // MIPS III extensions.
4131 this->add_extension(mach_mips_loongson_2e
, mach_mips4000
);
4132 this->add_extension(mach_mips_loongson_2f
, mach_mips4000
);
4133 this->add_extension(mach_mips8000
, mach_mips4000
);
4134 this->add_extension(mach_mips4650
, mach_mips4000
);
4135 this->add_extension(mach_mips4600
, mach_mips4000
);
4136 this->add_extension(mach_mips4400
, mach_mips4000
);
4137 this->add_extension(mach_mips4300
, mach_mips4000
);
4138 this->add_extension(mach_mips4100
, mach_mips4000
);
4139 this->add_extension(mach_mips4010
, mach_mips4000
);
4140 this->add_extension(mach_mips5900
, mach_mips4000
);
4142 // MIPS32 extensions.
4143 this->add_extension(mach_mipsisa32r2
, mach_mipsisa32
);
4145 // MIPS II extensions.
4146 this->add_extension(mach_mips4000
, mach_mips6000
);
4147 this->add_extension(mach_mipsisa32
, mach_mips6000
);
4149 // MIPS I extensions.
4150 this->add_extension(mach_mips6000
, mach_mips3000
);
4151 this->add_extension(mach_mips3900
, mach_mips3000
);
4154 // Add value to MIPS extenstions.
4156 add_extension(unsigned int base
, unsigned int extension
)
4158 std::pair
<unsigned int, unsigned int> ext(base
, extension
);
4159 this->mips_mach_extensions_
.push_back(ext
);
4162 // Return the number of entries in the .dynsym section.
4163 unsigned int get_dt_mips_symtabno() const
4165 return ((unsigned int)(this->layout_
->dynsym_section()->data_size()
4166 / elfcpp::Elf_sizes
<size
>::sym_size
));
4167 // TODO(sasa): Entry size is MIPS_ELF_SYM_SIZE.
4170 // Information about this specific target which we pass to the
4171 // general Target structure.
4172 static const Target::Target_info mips_info
;
4174 Mips_output_data_got
<size
, big_endian
>* got_
;
4175 // gp symbol. It has the value of .got + 0x7FF0.
4176 Sized_symbol
<size
>* gp_
;
4178 Mips_output_data_plt
<size
, big_endian
>* plt_
;
4179 // The GOT PLT section.
4180 Output_data_space
* got_plt_
;
4181 // The dynamic reloc section.
4182 Reloc_section
* rel_dyn_
;
4183 // The .rld_map section.
4184 Output_data_zero_fill
* rld_map_
;
4185 // Relocs saved to avoid a COPY reloc.
4186 Mips_copy_relocs
<elfcpp::SHT_REL
, size
, big_endian
> copy_relocs_
;
4188 // A list of dyn relocs to be saved.
4189 std::vector
<Dyn_reloc
> dyn_relocs_
;
4191 // The LA25 stub section.
4192 Mips_output_data_la25_stub
<size
, big_endian
>* la25_stub_
;
4193 // Architecture extensions.
4194 std::vector
<std::pair
<unsigned int, unsigned int> > mips_mach_extensions_
;
4196 Mips_output_data_mips_stubs
<size
, big_endian
>* mips_stubs_
;
4198 // Attributes section data in output.
4199 Attributes_section_data
* attributes_section_data_
;
4200 // .MIPS.abiflags section data in output.
4201 Mips_abiflags
<big_endian
>* abiflags_
;
4206 typename
std::list
<got16_addend
<size
, big_endian
> > got16_addends_
;
4208 // Whether there is an input .MIPS.abiflags section.
4209 bool has_abiflags_section_
;
4211 // Whether the entry symbol is mips16 or micromips.
4212 bool entry_symbol_is_compressed_
;
4214 // Whether we can use only 32-bit microMIPS instructions.
4215 // TODO(sasa): This should be a linker option.
4219 // Helper structure for R_MIPS*_HI16/LO16 and R_MIPS*_GOT16/LO16 relocations.
4220 // It records high part of the relocation pair.
4222 template<int size
, bool big_endian
>
4225 typedef typename
elfcpp::Elf_types
<size
>::Elf_Addr Mips_address
;
4227 reloc_high(unsigned char* _view
, const Mips_relobj
<size
, big_endian
>* _object
,
4228 const Symbol_value
<size
>* _psymval
, Mips_address _addend
,
4229 unsigned int _r_type
, unsigned int _r_sym
, bool _extract_addend
,
4230 Mips_address _address
= 0, bool _gp_disp
= false)
4231 : view(_view
), object(_object
), psymval(_psymval
), addend(_addend
),
4232 r_type(_r_type
), r_sym(_r_sym
), extract_addend(_extract_addend
),
4233 address(_address
), gp_disp(_gp_disp
)
4236 unsigned char* view
;
4237 const Mips_relobj
<size
, big_endian
>* object
;
4238 const Symbol_value
<size
>* psymval
;
4239 Mips_address addend
;
4240 unsigned int r_type
;
4242 bool extract_addend
;
4243 Mips_address address
;
4247 template<int size
, bool big_endian
>
4248 class Mips_relocate_functions
: public Relocate_functions
<size
, big_endian
>
4250 typedef typename
elfcpp::Elf_types
<size
>::Elf_Addr Mips_address
;
4251 typedef typename
elfcpp::Swap
<size
, big_endian
>::Valtype Valtype
;
4252 typedef typename
elfcpp::Swap
<16, big_endian
>::Valtype Valtype16
;
4253 typedef typename
elfcpp::Swap
<32, big_endian
>::Valtype Valtype32
;
4254 typedef typename
elfcpp::Swap
<64, big_endian
>::Valtype Valtype64
;
4259 STATUS_OKAY
, // No error during relocation.
4260 STATUS_OVERFLOW
, // Relocation overflow.
4261 STATUS_BAD_RELOC
, // Relocation cannot be applied.
4262 STATUS_PCREL_UNALIGNED
// Unaligned PC-relative relocation.
4266 typedef Relocate_functions
<size
, big_endian
> Base
;
4267 typedef Mips_relocate_functions
<size
, big_endian
> This
;
4269 static typename
std::list
<reloc_high
<size
, big_endian
> > hi16_relocs
;
4270 static typename
std::list
<reloc_high
<size
, big_endian
> > got16_relocs
;
4271 static typename
std::list
<reloc_high
<size
, big_endian
> > pchi16_relocs
;
4273 template<int valsize
>
4274 static inline typename
This::Status
4275 check_overflow(Valtype value
)
4278 return (Bits
<valsize
>::has_overflow32(value
)
4279 ? This::STATUS_OVERFLOW
4280 : This::STATUS_OKAY
);
4282 return (Bits
<valsize
>::has_overflow(value
)
4283 ? This::STATUS_OVERFLOW
4284 : This::STATUS_OKAY
);
4288 should_shuffle_micromips_reloc(unsigned int r_type
)
4290 return (micromips_reloc(r_type
)
4291 && r_type
!= elfcpp::R_MICROMIPS_PC7_S1
4292 && r_type
!= elfcpp::R_MICROMIPS_PC10_S1
);
4296 // R_MIPS16_26 is used for the mips16 jal and jalx instructions.
4297 // Most mips16 instructions are 16 bits, but these instructions
4300 // The format of these instructions is:
4302 // +--------------+--------------------------------+
4303 // | JALX | X| Imm 20:16 | Imm 25:21 |
4304 // +--------------+--------------------------------+
4305 // | Immediate 15:0 |
4306 // +-----------------------------------------------+
4308 // JALX is the 5-bit value 00011. X is 0 for jal, 1 for jalx.
4309 // Note that the immediate value in the first word is swapped.
4311 // When producing a relocatable object file, R_MIPS16_26 is
4312 // handled mostly like R_MIPS_26. In particular, the addend is
4313 // stored as a straight 26-bit value in a 32-bit instruction.
4314 // (gas makes life simpler for itself by never adjusting a
4315 // R_MIPS16_26 reloc to be against a section, so the addend is
4316 // always zero). However, the 32 bit instruction is stored as 2
4317 // 16-bit values, rather than a single 32-bit value. In a
4318 // big-endian file, the result is the same; in a little-endian
4319 // file, the two 16-bit halves of the 32 bit value are swapped.
4320 // This is so that a disassembler can recognize the jal
4323 // When doing a final link, R_MIPS16_26 is treated as a 32 bit
4324 // instruction stored as two 16-bit values. The addend A is the
4325 // contents of the targ26 field. The calculation is the same as
4326 // R_MIPS_26. When storing the calculated value, reorder the
4327 // immediate value as shown above, and don't forget to store the
4328 // value as two 16-bit values.
4330 // To put it in MIPS ABI terms, the relocation field is T-targ26-16,
4334 // +--------+----------------------+
4338 // +--------+----------------------+
4341 // +----------+------+-------------+
4343 // | sub1 | | sub2 |
4344 // |0 9|10 15|16 31|
4345 // +----------+--------------------+
4346 // where targ26-16 is sub1 followed by sub2 (i.e., the addend field A is
4347 // ((sub1 << 16) | sub2)).
4349 // When producing a relocatable object file, the calculation is
4350 // (((A < 2) | ((P + 4) & 0xf0000000) + S) >> 2)
4351 // When producing a fully linked file, the calculation is
4352 // let R = (((A < 2) | ((P + 4) & 0xf0000000) + S) >> 2)
4353 // ((R & 0x1f0000) << 5) | ((R & 0x3e00000) >> 5) | (R & 0xffff)
4355 // The table below lists the other MIPS16 instruction relocations.
4356 // Each one is calculated in the same way as the non-MIPS16 relocation
4357 // given on the right, but using the extended MIPS16 layout of 16-bit
4358 // immediate fields:
4360 // R_MIPS16_GPREL R_MIPS_GPREL16
4361 // R_MIPS16_GOT16 R_MIPS_GOT16
4362 // R_MIPS16_CALL16 R_MIPS_CALL16
4363 // R_MIPS16_HI16 R_MIPS_HI16
4364 // R_MIPS16_LO16 R_MIPS_LO16
4366 // A typical instruction will have a format like this:
4368 // +--------------+--------------------------------+
4369 // | EXTEND | Imm 10:5 | Imm 15:11 |
4370 // +--------------+--------------------------------+
4371 // | Major | rx | ry | Imm 4:0 |
4372 // +--------------+--------------------------------+
4374 // EXTEND is the five bit value 11110. Major is the instruction
4377 // All we need to do here is shuffle the bits appropriately.
4378 // As above, the two 16-bit halves must be swapped on a
4379 // little-endian system.
4381 // Similar to MIPS16, the two 16-bit halves in microMIPS must be swapped
4382 // on a little-endian system. This does not apply to R_MICROMIPS_PC7_S1
4383 // and R_MICROMIPS_PC10_S1 relocs that apply to 16-bit instructions.
4386 mips_reloc_unshuffle(unsigned char* view
, unsigned int r_type
,
4389 if (!mips16_reloc(r_type
)
4390 && !should_shuffle_micromips_reloc(r_type
))
4393 // Pick up the first and second halfwords of the instruction.
4394 Valtype16 first
= elfcpp::Swap
<16, big_endian
>::readval(view
);
4395 Valtype16 second
= elfcpp::Swap
<16, big_endian
>::readval(view
+ 2);
4398 if (micromips_reloc(r_type
)
4399 || (r_type
== elfcpp::R_MIPS16_26
&& !jal_shuffle
))
4400 val
= first
<< 16 | second
;
4401 else if (r_type
!= elfcpp::R_MIPS16_26
)
4402 val
= (((first
& 0xf800) << 16) | ((second
& 0xffe0) << 11)
4403 | ((first
& 0x1f) << 11) | (first
& 0x7e0) | (second
& 0x1f));
4405 val
= (((first
& 0xfc00) << 16) | ((first
& 0x3e0) << 11)
4406 | ((first
& 0x1f) << 21) | second
);
4408 elfcpp::Swap
<32, big_endian
>::writeval(view
, val
);
4412 mips_reloc_shuffle(unsigned char* view
, unsigned int r_type
, bool jal_shuffle
)
4414 if (!mips16_reloc(r_type
)
4415 && !should_shuffle_micromips_reloc(r_type
))
4418 Valtype32 val
= elfcpp::Swap
<32, big_endian
>::readval(view
);
4419 Valtype16 first
, second
;
4421 if (micromips_reloc(r_type
)
4422 || (r_type
== elfcpp::R_MIPS16_26
&& !jal_shuffle
))
4424 second
= val
& 0xffff;
4427 else if (r_type
!= elfcpp::R_MIPS16_26
)
4429 second
= ((val
>> 11) & 0xffe0) | (val
& 0x1f);
4430 first
= ((val
>> 16) & 0xf800) | ((val
>> 11) & 0x1f) | (val
& 0x7e0);
4434 second
= val
& 0xffff;
4435 first
= ((val
>> 16) & 0xfc00) | ((val
>> 11) & 0x3e0)
4436 | ((val
>> 21) & 0x1f);
4439 elfcpp::Swap
<16, big_endian
>::writeval(view
+ 2, second
);
4440 elfcpp::Swap
<16, big_endian
>::writeval(view
, first
);
4443 // R_MIPS_16: S + sign-extend(A)
4444 static inline typename
This::Status
4445 rel16(unsigned char* view
, const Mips_relobj
<size
, big_endian
>* object
,
4446 const Symbol_value
<size
>* psymval
, Mips_address addend_a
,
4447 bool extract_addend
, bool calculate_only
, Valtype
* calculated_value
)
4449 Valtype16
* wv
= reinterpret_cast<Valtype16
*>(view
);
4450 Valtype16 val
= elfcpp::Swap
<16, big_endian
>::readval(wv
);
4452 Valtype addend
= (extract_addend
? Bits
<16>::sign_extend32(val
)
4455 Valtype x
= psymval
->value(object
, addend
);
4456 val
= Bits
<16>::bit_select32(val
, x
, 0xffffU
);
4460 *calculated_value
= x
;
4461 return This::STATUS_OKAY
;
4464 elfcpp::Swap
<16, big_endian
>::writeval(wv
, val
);
4466 return check_overflow
<16>(x
);
4470 static inline typename
This::Status
4471 rel32(unsigned char* view
, const Mips_relobj
<size
, big_endian
>* object
,
4472 const Symbol_value
<size
>* psymval
, Mips_address addend_a
,
4473 bool extract_addend
, bool calculate_only
, Valtype
* calculated_value
)
4475 Valtype32
* wv
= reinterpret_cast<Valtype32
*>(view
);
4476 Valtype addend
= (extract_addend
4477 ? elfcpp::Swap
<32, big_endian
>::readval(wv
)
4479 Valtype x
= psymval
->value(object
, addend
);
4482 *calculated_value
= x
;
4484 elfcpp::Swap
<32, big_endian
>::writeval(wv
, x
);
4486 return This::STATUS_OKAY
;
4489 // R_MIPS_JALR, R_MICROMIPS_JALR
4490 static inline typename
This::Status
4491 reljalr(unsigned char* view
, const Mips_relobj
<size
, big_endian
>* object
,
4492 const Symbol_value
<size
>* psymval
, Mips_address address
,
4493 Mips_address addend_a
, bool extract_addend
, bool cross_mode_jump
,
4494 unsigned int r_type
, bool jalr_to_bal
, bool jr_to_b
,
4495 bool calculate_only
, Valtype
* calculated_value
)
4497 Valtype32
* wv
= reinterpret_cast<Valtype32
*>(view
);
4498 Valtype addend
= extract_addend
? 0 : addend_a
;
4499 Valtype32 val
= elfcpp::Swap
<32, big_endian
>::readval(wv
);
4501 // Try converting J(AL)R to B(AL), if the target is in range.
4502 if (!parameters
->options().relocatable()
4503 && r_type
== elfcpp::R_MIPS_JALR
4505 && ((jalr_to_bal
&& val
== 0x0320f809) // jalr t9
4506 || (jr_to_b
&& val
== 0x03200008))) // jr t9
4508 int offset
= psymval
->value(object
, addend
) - (address
+ 4);
4509 if (!Bits
<18>::has_overflow32(offset
))
4511 if (val
== 0x03200008) // jr t9
4512 val
= 0x10000000 | (((Valtype32
)offset
>> 2) & 0xffff); // b addr
4514 val
= 0x04110000 | (((Valtype32
)offset
>> 2) & 0xffff); //bal addr
4519 *calculated_value
= val
;
4521 elfcpp::Swap
<32, big_endian
>::writeval(wv
, val
);
4523 return This::STATUS_OKAY
;
4526 // R_MIPS_PC32: S + A - P
4527 static inline typename
This::Status
4528 relpc32(unsigned char* view
, const Mips_relobj
<size
, big_endian
>* object
,
4529 const Symbol_value
<size
>* psymval
, Mips_address address
,
4530 Mips_address addend_a
, bool extract_addend
, bool calculate_only
,
4531 Valtype
* calculated_value
)
4533 Valtype32
* wv
= reinterpret_cast<Valtype32
*>(view
);
4534 Valtype addend
= (extract_addend
4535 ? elfcpp::Swap
<32, big_endian
>::readval(wv
)
4537 Valtype x
= psymval
->value(object
, addend
) - address
;
4540 *calculated_value
= x
;
4542 elfcpp::Swap
<32, big_endian
>::writeval(wv
, x
);
4544 return This::STATUS_OKAY
;
4547 // R_MIPS_26, R_MIPS16_26, R_MICROMIPS_26_S1
4548 static inline typename
This::Status
4549 rel26(unsigned char* view
, const Mips_relobj
<size
, big_endian
>* object
,
4550 const Symbol_value
<size
>* psymval
, Mips_address address
,
4551 bool local
, Mips_address addend_a
, bool extract_addend
,
4552 const Symbol
* gsym
, bool cross_mode_jump
, unsigned int r_type
,
4553 bool jal_to_bal
, bool calculate_only
, Valtype
* calculated_value
)
4555 Valtype32
* wv
= reinterpret_cast<Valtype32
*>(view
);
4556 Valtype32 val
= elfcpp::Swap
<32, big_endian
>::readval(wv
);
4561 if (r_type
== elfcpp::R_MICROMIPS_26_S1
)
4562 addend
= (val
& 0x03ffffff) << 1;
4564 addend
= (val
& 0x03ffffff) << 2;
4569 // Make sure the target of JALX is word-aligned. Bit 0 must be
4570 // the correct ISA mode selector and bit 1 must be 0.
4571 if (!calculate_only
&& cross_mode_jump
4572 && (psymval
->value(object
, 0) & 3) != (r_type
== elfcpp::R_MIPS_26
))
4574 gold_warning(_("JALX to a non-word-aligned address"));
4575 return This::STATUS_BAD_RELOC
;
4578 // Shift is 2, unusually, for microMIPS JALX.
4579 unsigned int shift
=
4580 (!cross_mode_jump
&& r_type
== elfcpp::R_MICROMIPS_26_S1
) ? 1 : 2;
4584 x
= addend
| ((address
+ 4) & (0xfc000000 << shift
));
4588 x
= Bits
<27>::sign_extend32(addend
);
4590 x
= Bits
<28>::sign_extend32(addend
);
4592 x
= psymval
->value(object
, x
) >> shift
;
4594 if (!calculate_only
&& !local
&& !gsym
->is_weak_undefined()
4595 && ((x
>> 26) != ((address
+ 4) >> (26 + shift
))))
4596 return This::STATUS_OVERFLOW
;
4598 val
= Bits
<32>::bit_select32(val
, x
, 0x03ffffff);
4600 // If required, turn JAL into JALX.
4601 if (cross_mode_jump
)
4604 Valtype32 opcode
= val
>> 26;
4605 Valtype32 jalx_opcode
;
4607 // Check to see if the opcode is already JAL or JALX.
4608 if (r_type
== elfcpp::R_MIPS16_26
)
4610 ok
= (opcode
== 0x6) || (opcode
== 0x7);
4613 else if (r_type
== elfcpp::R_MICROMIPS_26_S1
)
4615 ok
= (opcode
== 0x3d) || (opcode
== 0x3c);
4620 ok
= (opcode
== 0x3) || (opcode
== 0x1d);
4624 // If the opcode is not JAL or JALX, there's a problem. We cannot
4625 // convert J or JALS to JALX.
4626 if (!calculate_only
&& !ok
)
4628 gold_error(_("Unsupported jump between ISA modes; consider "
4629 "recompiling with interlinking enabled."));
4630 return This::STATUS_BAD_RELOC
;
4633 // Make this the JALX opcode.
4634 val
= (val
& ~(0x3f << 26)) | (jalx_opcode
<< 26);
4637 // Try converting JAL to BAL, if the target is in range.
4638 if (!parameters
->options().relocatable()
4641 && r_type
== elfcpp::R_MIPS_26
4642 && (val
>> 26) == 0x3))) // jal addr
4644 Valtype32 dest
= (x
<< 2) | (((address
+ 4) >> 28) << 28);
4645 int offset
= dest
- (address
+ 4);
4646 if (!Bits
<18>::has_overflow32(offset
))
4648 if (val
== 0x03200008) // jr t9
4649 val
= 0x10000000 | (((Valtype32
)offset
>> 2) & 0xffff); // b addr
4651 val
= 0x04110000 | (((Valtype32
)offset
>> 2) & 0xffff); //bal addr
4656 *calculated_value
= val
;
4658 elfcpp::Swap
<32, big_endian
>::writeval(wv
, val
);
4660 return This::STATUS_OKAY
;
4664 static inline typename
This::Status
4665 relpc16(unsigned char* view
, const Mips_relobj
<size
, big_endian
>* object
,
4666 const Symbol_value
<size
>* psymval
, Mips_address address
,
4667 Mips_address addend_a
, bool extract_addend
, bool calculate_only
,
4668 Valtype
* calculated_value
)
4670 Valtype32
* wv
= reinterpret_cast<Valtype32
*>(view
);
4671 Valtype32 val
= elfcpp::Swap
<32, big_endian
>::readval(wv
);
4673 Valtype addend
= (extract_addend
4674 ? Bits
<18>::sign_extend32((val
& 0xffff) << 2)
4677 Valtype x
= psymval
->value(object
, addend
) - address
;
4678 val
= Bits
<16>::bit_select32(val
, x
>> 2, 0xffff);
4682 *calculated_value
= x
>> 2;
4683 return This::STATUS_OKAY
;
4686 elfcpp::Swap
<32, big_endian
>::writeval(wv
, val
);
4688 if (psymval
->value(object
, addend
) & 3)
4689 return This::STATUS_PCREL_UNALIGNED
;
4691 return check_overflow
<18>(x
);
4695 static inline typename
This::Status
4696 relpc21(unsigned char* view
, const Mips_relobj
<size
, big_endian
>* object
,
4697 const Symbol_value
<size
>* psymval
, Mips_address address
,
4698 Mips_address addend_a
, bool extract_addend
, bool calculate_only
,
4699 Valtype
* calculated_value
)
4701 Valtype32
* wv
= reinterpret_cast<Valtype32
*>(view
);
4702 Valtype32 val
= elfcpp::Swap
<32, big_endian
>::readval(wv
);
4704 Valtype addend
= (extract_addend
4705 ? Bits
<23>::sign_extend32((val
& 0x1fffff) << 2)
4708 Valtype x
= psymval
->value(object
, addend
) - address
;
4709 val
= Bits
<21>::bit_select32(val
, x
>> 2, 0x1fffff);
4713 *calculated_value
= x
>> 2;
4714 return This::STATUS_OKAY
;
4717 elfcpp::Swap
<32, big_endian
>::writeval(wv
, val
);
4719 if (psymval
->value(object
, addend
) & 3)
4720 return This::STATUS_PCREL_UNALIGNED
;
4722 return check_overflow
<23>(x
);
4726 static inline typename
This::Status
4727 relpc26(unsigned char* view
, const Mips_relobj
<size
, big_endian
>* object
,
4728 const Symbol_value
<size
>* psymval
, Mips_address address
,
4729 Mips_address addend_a
, bool extract_addend
, bool calculate_only
,
4730 Valtype
* calculated_value
)
4732 Valtype32
* wv
= reinterpret_cast<Valtype32
*>(view
);
4733 Valtype32 val
= elfcpp::Swap
<32, big_endian
>::readval(wv
);
4735 Valtype addend
= (extract_addend
4736 ? Bits
<28>::sign_extend32((val
& 0x3ffffff) << 2)
4739 Valtype x
= psymval
->value(object
, addend
) - address
;
4740 val
= Bits
<26>::bit_select32(val
, x
>> 2, 0x3ffffff);
4744 *calculated_value
= x
>> 2;
4745 return This::STATUS_OKAY
;
4748 elfcpp::Swap
<32, big_endian
>::writeval(wv
, val
);
4750 if (psymval
->value(object
, addend
) & 3)
4751 return This::STATUS_PCREL_UNALIGNED
;
4753 return check_overflow
<28>(x
);
4757 static inline typename
This::Status
4758 relpc18(unsigned char* view
, const Mips_relobj
<size
, big_endian
>* object
,
4759 const Symbol_value
<size
>* psymval
, Mips_address address
,
4760 Mips_address addend_a
, bool extract_addend
, bool calculate_only
,
4761 Valtype
* calculated_value
)
4763 Valtype32
* wv
= reinterpret_cast<Valtype32
*>(view
);
4764 Valtype32 val
= elfcpp::Swap
<32, big_endian
>::readval(wv
);
4766 Valtype addend
= (extract_addend
4767 ? Bits
<21>::sign_extend32((val
& 0x3ffff) << 3)
4770 Valtype x
= psymval
->value(object
, addend
) - ((address
| 7) ^ 7);
4771 val
= Bits
<18>::bit_select32(val
, x
>> 3, 0x3ffff);
4775 *calculated_value
= x
>> 3;
4776 return This::STATUS_OKAY
;
4779 elfcpp::Swap
<32, big_endian
>::writeval(wv
, val
);
4781 if (psymval
->value(object
, addend
) & 7)
4782 return This::STATUS_PCREL_UNALIGNED
;
4784 return check_overflow
<21>(x
);
4788 static inline typename
This::Status
4789 relpc19(unsigned char* view
, const Mips_relobj
<size
, big_endian
>* object
,
4790 const Symbol_value
<size
>* psymval
, Mips_address address
,
4791 Mips_address addend_a
, bool extract_addend
, bool calculate_only
,
4792 Valtype
* calculated_value
)
4794 Valtype32
* wv
= reinterpret_cast<Valtype32
*>(view
);
4795 Valtype32 val
= elfcpp::Swap
<32, big_endian
>::readval(wv
);
4797 Valtype addend
= (extract_addend
4798 ? Bits
<21>::sign_extend32((val
& 0x7ffff) << 2)
4801 Valtype x
= psymval
->value(object
, addend
) - address
;
4802 val
= Bits
<19>::bit_select32(val
, x
>> 2, 0x7ffff);
4806 *calculated_value
= x
>> 2;
4807 return This::STATUS_OKAY
;
4810 elfcpp::Swap
<32, big_endian
>::writeval(wv
, val
);
4812 if (psymval
->value(object
, addend
) & 3)
4813 return This::STATUS_PCREL_UNALIGNED
;
4815 return check_overflow
<21>(x
);
4819 static inline typename
This::Status
4820 relpchi16(unsigned char* view
, const Mips_relobj
<size
, big_endian
>* object
,
4821 const Symbol_value
<size
>* psymval
, Mips_address addend
,
4822 Mips_address address
, unsigned int r_sym
, bool extract_addend
)
4824 // Record the relocation. It will be resolved when we find pclo16 part.
4825 pchi16_relocs
.push_back(reloc_high
<size
, big_endian
>(view
, object
, psymval
,
4826 addend
, 0, r_sym
, extract_addend
, address
));
4827 return This::STATUS_OKAY
;
4831 static inline typename
This::Status
4832 do_relpchi16(unsigned char* view
, const Mips_relobj
<size
, big_endian
>* object
,
4833 const Symbol_value
<size
>* psymval
, Mips_address addend_hi
,
4834 Mips_address address
, bool extract_addend
, Valtype32 addend_lo
,
4835 bool calculate_only
, Valtype
* calculated_value
)
4837 Valtype32
* wv
= reinterpret_cast<Valtype32
*>(view
);
4838 Valtype32 val
= elfcpp::Swap
<32, big_endian
>::readval(wv
);
4840 Valtype addend
= (extract_addend
? ((val
& 0xffff) << 16) + addend_lo
4843 Valtype value
= psymval
->value(object
, addend
) - address
;
4844 Valtype x
= ((value
+ 0x8000) >> 16) & 0xffff;
4845 val
= Bits
<32>::bit_select32(val
, x
, 0xffff);
4848 *calculated_value
= x
;
4850 elfcpp::Swap
<32, big_endian
>::writeval(wv
, val
);
4852 return This::STATUS_OKAY
;
4856 static inline typename
This::Status
4857 relpclo16(unsigned char* view
, const Mips_relobj
<size
, big_endian
>* object
,
4858 const Symbol_value
<size
>* psymval
, Mips_address addend_a
,
4859 bool extract_addend
, Mips_address address
, unsigned int r_sym
,
4860 unsigned int rel_type
, bool calculate_only
,
4861 Valtype
* calculated_value
)
4863 Valtype32
* wv
= reinterpret_cast<Valtype32
*>(view
);
4864 Valtype32 val
= elfcpp::Swap
<32, big_endian
>::readval(wv
);
4866 Valtype addend
= (extract_addend
? Bits
<16>::sign_extend32(val
& 0xffff)
4869 if (rel_type
== elfcpp::SHT_REL
)
4871 // Resolve pending R_MIPS_PCHI16 relocations.
4872 typename
std::list
<reloc_high
<size
, big_endian
> >::iterator it
=
4873 pchi16_relocs
.begin();
4874 while (it
!= pchi16_relocs
.end())
4876 reloc_high
<size
, big_endian
> pchi16
= *it
;
4877 if (pchi16
.r_sym
== r_sym
)
4879 do_relpchi16(pchi16
.view
, pchi16
.object
, pchi16
.psymval
,
4880 pchi16
.addend
, pchi16
.address
,
4881 pchi16
.extract_addend
, addend
, calculate_only
,
4883 it
= pchi16_relocs
.erase(it
);
4890 // Resolve R_MIPS_PCLO16 relocation.
4891 Valtype x
= psymval
->value(object
, addend
) - address
;
4892 val
= Bits
<32>::bit_select32(val
, x
, 0xffff);
4895 *calculated_value
= x
;
4897 elfcpp::Swap
<32, big_endian
>::writeval(wv
, val
);
4899 return This::STATUS_OKAY
;
4902 // R_MICROMIPS_PC7_S1
4903 static inline typename
This::Status
4904 relmicromips_pc7_s1(unsigned char* view
,
4905 const Mips_relobj
<size
, big_endian
>* object
,
4906 const Symbol_value
<size
>* psymval
, Mips_address address
,
4907 Mips_address addend_a
, bool extract_addend
,
4908 bool calculate_only
, Valtype
* calculated_value
)
4910 Valtype32
* wv
= reinterpret_cast<Valtype32
*>(view
);
4911 Valtype32 val
= elfcpp::Swap
<32, big_endian
>::readval(wv
);
4913 Valtype addend
= extract_addend
? Bits
<8>::sign_extend32((val
& 0x7f) << 1)
4916 Valtype x
= psymval
->value(object
, addend
) - address
;
4917 val
= Bits
<16>::bit_select32(val
, x
>> 1, 0x7f);
4921 *calculated_value
= x
>> 1;
4922 return This::STATUS_OKAY
;
4925 elfcpp::Swap
<32, big_endian
>::writeval(wv
, val
);
4927 return check_overflow
<8>(x
);
4930 // R_MICROMIPS_PC10_S1
4931 static inline typename
This::Status
4932 relmicromips_pc10_s1(unsigned char* view
,
4933 const Mips_relobj
<size
, big_endian
>* object
,
4934 const Symbol_value
<size
>* psymval
, Mips_address address
,
4935 Mips_address addend_a
, bool extract_addend
,
4936 bool calculate_only
, Valtype
* calculated_value
)
4938 Valtype32
* wv
= reinterpret_cast<Valtype32
*>(view
);
4939 Valtype32 val
= elfcpp::Swap
<32, big_endian
>::readval(wv
);
4941 Valtype addend
= (extract_addend
4942 ? Bits
<11>::sign_extend32((val
& 0x3ff) << 1)
4945 Valtype x
= psymval
->value(object
, addend
) - address
;
4946 val
= Bits
<16>::bit_select32(val
, x
>> 1, 0x3ff);
4950 *calculated_value
= x
>> 1;
4951 return This::STATUS_OKAY
;
4954 elfcpp::Swap
<32, big_endian
>::writeval(wv
, val
);
4956 return check_overflow
<11>(x
);
4959 // R_MICROMIPS_PC16_S1
4960 static inline typename
This::Status
4961 relmicromips_pc16_s1(unsigned char* view
,
4962 const Mips_relobj
<size
, big_endian
>* object
,
4963 const Symbol_value
<size
>* psymval
, Mips_address address
,
4964 Mips_address addend_a
, bool extract_addend
,
4965 bool calculate_only
, Valtype
* calculated_value
)
4967 Valtype32
* wv
= reinterpret_cast<Valtype32
*>(view
);
4968 Valtype32 val
= elfcpp::Swap
<32, big_endian
>::readval(wv
);
4970 Valtype addend
= (extract_addend
4971 ? Bits
<17>::sign_extend32((val
& 0xffff) << 1)
4974 Valtype x
= psymval
->value(object
, addend
) - address
;
4975 val
= Bits
<16>::bit_select32(val
, x
>> 1, 0xffff);
4979 *calculated_value
= x
>> 1;
4980 return This::STATUS_OKAY
;
4983 elfcpp::Swap
<32, big_endian
>::writeval(wv
, val
);
4985 return check_overflow
<17>(x
);
4988 // R_MIPS_HI16, R_MIPS16_HI16, R_MICROMIPS_HI16,
4989 static inline typename
This::Status
4990 relhi16(unsigned char* view
, const Mips_relobj
<size
, big_endian
>* object
,
4991 const Symbol_value
<size
>* psymval
, Mips_address addend
,
4992 Mips_address address
, bool gp_disp
, unsigned int r_type
,
4993 unsigned int r_sym
, bool extract_addend
)
4995 // Record the relocation. It will be resolved when we find lo16 part.
4996 hi16_relocs
.push_back(reloc_high
<size
, big_endian
>(view
, object
, psymval
,
4997 addend
, r_type
, r_sym
, extract_addend
, address
,
4999 return This::STATUS_OKAY
;
5002 // R_MIPS_HI16, R_MIPS16_HI16, R_MICROMIPS_HI16,
5003 static inline typename
This::Status
5004 do_relhi16(unsigned char* view
, const Mips_relobj
<size
, big_endian
>* object
,
5005 const Symbol_value
<size
>* psymval
, Mips_address addend_hi
,
5006 Mips_address address
, bool is_gp_disp
, unsigned int r_type
,
5007 bool extract_addend
, Valtype32 addend_lo
,
5008 Target_mips
<size
, big_endian
>* target
, bool calculate_only
,
5009 Valtype
* calculated_value
)
5011 Valtype32
* wv
= reinterpret_cast<Valtype32
*>(view
);
5012 Valtype32 val
= elfcpp::Swap
<32, big_endian
>::readval(wv
);
5014 Valtype addend
= (extract_addend
? ((val
& 0xffff) << 16) + addend_lo
5019 value
= psymval
->value(object
, addend
);
5022 // For MIPS16 ABI code we generate this sequence
5023 // 0: li $v0,%hi(_gp_disp)
5024 // 4: addiupc $v1,%lo(_gp_disp)
5028 // So the offsets of hi and lo relocs are the same, but the
5029 // base $pc is that used by the ADDIUPC instruction at $t9 + 4.
5030 // ADDIUPC clears the low two bits of the instruction address,
5031 // so the base is ($t9 + 4) & ~3.
5033 if (r_type
== elfcpp::R_MIPS16_HI16
)
5034 gp_disp
= (target
->adjusted_gp_value(object
)
5035 - ((address
+ 4) & ~0x3));
5036 // The microMIPS .cpload sequence uses the same assembly
5037 // instructions as the traditional psABI version, but the
5038 // incoming $t9 has the low bit set.
5039 else if (r_type
== elfcpp::R_MICROMIPS_HI16
)
5040 gp_disp
= target
->adjusted_gp_value(object
) - address
- 1;
5042 gp_disp
= target
->adjusted_gp_value(object
) - address
;
5043 value
= gp_disp
+ addend
;
5045 Valtype x
= ((value
+ 0x8000) >> 16) & 0xffff;
5046 val
= Bits
<32>::bit_select32(val
, x
, 0xffff);
5050 *calculated_value
= x
;
5051 return This::STATUS_OKAY
;
5054 elfcpp::Swap
<32, big_endian
>::writeval(wv
, val
);
5056 return (is_gp_disp
? check_overflow
<16>(x
)
5057 : This::STATUS_OKAY
);
5060 // R_MIPS_GOT16, R_MIPS16_GOT16, R_MICROMIPS_GOT16
5061 static inline typename
This::Status
5062 relgot16_local(unsigned char* view
,
5063 const Mips_relobj
<size
, big_endian
>* object
,
5064 const Symbol_value
<size
>* psymval
, Mips_address addend_a
,
5065 bool extract_addend
, unsigned int r_type
, unsigned int r_sym
)
5067 // Record the relocation. It will be resolved when we find lo16 part.
5068 got16_relocs
.push_back(reloc_high
<size
, big_endian
>(view
, object
, psymval
,
5069 addend_a
, r_type
, r_sym
, extract_addend
));
5070 return This::STATUS_OKAY
;
5073 // R_MIPS_GOT16, R_MIPS16_GOT16, R_MICROMIPS_GOT16
5074 static inline typename
This::Status
5075 do_relgot16_local(unsigned char* view
,
5076 const Mips_relobj
<size
, big_endian
>* object
,
5077 const Symbol_value
<size
>* psymval
, Mips_address addend_hi
,
5078 bool extract_addend
, Valtype32 addend_lo
,
5079 Target_mips
<size
, big_endian
>* target
, bool calculate_only
,
5080 Valtype
* calculated_value
)
5082 Valtype32
* wv
= reinterpret_cast<Valtype32
*>(view
);
5083 Valtype32 val
= elfcpp::Swap
<32, big_endian
>::readval(wv
);
5085 Valtype addend
= (extract_addend
? ((val
& 0xffff) << 16) + addend_lo
5088 // Find GOT page entry.
5089 Mips_address value
= ((psymval
->value(object
, addend
) + 0x8000) >> 16)
5092 unsigned int got_offset
=
5093 target
->got_section()->get_got_page_offset(value
, object
);
5095 // Resolve the relocation.
5096 Valtype x
= target
->got_section()->gp_offset(got_offset
, object
);
5097 val
= Bits
<32>::bit_select32(val
, x
, 0xffff);
5101 *calculated_value
= x
;
5102 return This::STATUS_OKAY
;
5105 elfcpp::Swap
<32, big_endian
>::writeval(wv
, val
);
5107 return check_overflow
<16>(x
);
5110 // R_MIPS_LO16, R_MIPS16_LO16, R_MICROMIPS_LO16, R_MICROMIPS_HI0_LO16
5111 static inline typename
This::Status
5112 rello16(Target_mips
<size
, big_endian
>* target
, unsigned char* view
,
5113 const Mips_relobj
<size
, big_endian
>* object
,
5114 const Symbol_value
<size
>* psymval
, Mips_address addend_a
,
5115 bool extract_addend
, Mips_address address
, bool is_gp_disp
,
5116 unsigned int r_type
, unsigned int r_sym
, unsigned int rel_type
,
5117 bool calculate_only
, Valtype
* calculated_value
)
5119 Valtype32
* wv
= reinterpret_cast<Valtype32
*>(view
);
5120 Valtype32 val
= elfcpp::Swap
<32, big_endian
>::readval(wv
);
5122 Valtype addend
= (extract_addend
? Bits
<16>::sign_extend32(val
& 0xffff)
5125 if (rel_type
== elfcpp::SHT_REL
)
5127 typename
This::Status reloc_status
= This::STATUS_OKAY
;
5128 // Resolve pending R_MIPS_HI16 relocations.
5129 typename
std::list
<reloc_high
<size
, big_endian
> >::iterator it
=
5130 hi16_relocs
.begin();
5131 while (it
!= hi16_relocs
.end())
5133 reloc_high
<size
, big_endian
> hi16
= *it
;
5134 if (hi16
.r_sym
== r_sym
5135 && is_matching_lo16_reloc(hi16
.r_type
, r_type
))
5137 mips_reloc_unshuffle(hi16
.view
, hi16
.r_type
, false);
5138 reloc_status
= do_relhi16(hi16
.view
, hi16
.object
, hi16
.psymval
,
5139 hi16
.addend
, hi16
.address
, hi16
.gp_disp
,
5140 hi16
.r_type
, hi16
.extract_addend
, addend
,
5141 target
, calculate_only
, calculated_value
);
5142 mips_reloc_shuffle(hi16
.view
, hi16
.r_type
, false);
5143 if (reloc_status
== This::STATUS_OVERFLOW
)
5144 return This::STATUS_OVERFLOW
;
5145 it
= hi16_relocs
.erase(it
);
5151 // Resolve pending local R_MIPS_GOT16 relocations.
5152 typename
std::list
<reloc_high
<size
, big_endian
> >::iterator it2
=
5153 got16_relocs
.begin();
5154 while (it2
!= got16_relocs
.end())
5156 reloc_high
<size
, big_endian
> got16
= *it2
;
5157 if (got16
.r_sym
== r_sym
5158 && is_matching_lo16_reloc(got16
.r_type
, r_type
))
5160 mips_reloc_unshuffle(got16
.view
, got16
.r_type
, false);
5162 reloc_status
= do_relgot16_local(got16
.view
, got16
.object
,
5163 got16
.psymval
, got16
.addend
,
5164 got16
.extract_addend
, addend
, target
,
5165 calculate_only
, calculated_value
);
5167 mips_reloc_shuffle(got16
.view
, got16
.r_type
, false);
5168 if (reloc_status
== This::STATUS_OVERFLOW
)
5169 return This::STATUS_OVERFLOW
;
5170 it2
= got16_relocs
.erase(it2
);
5177 // Resolve R_MIPS_LO16 relocation.
5180 x
= psymval
->value(object
, addend
);
5183 // See the comment for R_MIPS16_HI16 above for the reason
5184 // for this conditional.
5186 if (r_type
== elfcpp::R_MIPS16_LO16
)
5187 gp_disp
= target
->adjusted_gp_value(object
) - (address
& ~0x3);
5188 else if (r_type
== elfcpp::R_MICROMIPS_LO16
5189 || r_type
== elfcpp::R_MICROMIPS_HI0_LO16
)
5190 gp_disp
= target
->adjusted_gp_value(object
) - address
+ 3;
5192 gp_disp
= target
->adjusted_gp_value(object
) - address
+ 4;
5193 // The MIPS ABI requires checking the R_MIPS_LO16 relocation
5194 // for overflow. Relocations against _gp_disp are normally
5195 // generated from the .cpload pseudo-op. It generates code
5196 // that normally looks like this:
5198 // lui $gp,%hi(_gp_disp)
5199 // addiu $gp,$gp,%lo(_gp_disp)
5202 // Here $t9 holds the address of the function being called,
5203 // as required by the MIPS ELF ABI. The R_MIPS_LO16
5204 // relocation can easily overflow in this situation, but the
5205 // R_MIPS_HI16 relocation will handle the overflow.
5206 // Therefore, we consider this a bug in the MIPS ABI, and do
5207 // not check for overflow here.
5208 x
= gp_disp
+ addend
;
5210 val
= Bits
<32>::bit_select32(val
, x
, 0xffff);
5213 *calculated_value
= x
;
5215 elfcpp::Swap
<32, big_endian
>::writeval(wv
, val
);
5217 return This::STATUS_OKAY
;
5220 // R_MIPS_CALL16, R_MIPS16_CALL16, R_MICROMIPS_CALL16
5221 // R_MIPS_GOT16, R_MIPS16_GOT16, R_MICROMIPS_GOT16
5222 // R_MIPS_TLS_GD, R_MIPS16_TLS_GD, R_MICROMIPS_TLS_GD
5223 // R_MIPS_TLS_GOTTPREL, R_MIPS16_TLS_GOTTPREL, R_MICROMIPS_TLS_GOTTPREL
5224 // R_MIPS_TLS_LDM, R_MIPS16_TLS_LDM, R_MICROMIPS_TLS_LDM
5225 // R_MIPS_GOT_DISP, R_MICROMIPS_GOT_DISP
5226 static inline typename
This::Status
5227 relgot(unsigned char* view
, int gp_offset
, bool calculate_only
,
5228 Valtype
* calculated_value
)
5230 Valtype32
* wv
= reinterpret_cast<Valtype32
*>(view
);
5231 Valtype32 val
= elfcpp::Swap
<32, big_endian
>::readval(wv
);
5232 Valtype x
= gp_offset
;
5233 val
= Bits
<32>::bit_select32(val
, x
, 0xffff);
5237 *calculated_value
= x
;
5238 return This::STATUS_OKAY
;
5241 elfcpp::Swap
<32, big_endian
>::writeval(wv
, val
);
5243 return check_overflow
<16>(x
);
5247 static inline typename
This::Status
5248 releh(unsigned char* view
, int gp_offset
, bool calculate_only
,
5249 Valtype
* calculated_value
)
5251 Valtype32
* wv
= reinterpret_cast<Valtype32
*>(view
);
5252 Valtype x
= gp_offset
;
5256 *calculated_value
= x
;
5257 return This::STATUS_OKAY
;
5260 elfcpp::Swap
<32, big_endian
>::writeval(wv
, x
);
5262 return check_overflow
<32>(x
);
5265 // R_MIPS_GOT_PAGE, R_MICROMIPS_GOT_PAGE
5266 static inline typename
This::Status
5267 relgotpage(Target_mips
<size
, big_endian
>* target
, unsigned char* view
,
5268 const Mips_relobj
<size
, big_endian
>* object
,
5269 const Symbol_value
<size
>* psymval
, Mips_address addend_a
,
5270 bool extract_addend
, bool calculate_only
,
5271 Valtype
* calculated_value
)
5273 Valtype32
* wv
= reinterpret_cast<Valtype32
*>(view
);
5274 Valtype32 val
= elfcpp::Swap
<32, big_endian
>::readval(view
);
5275 Valtype addend
= extract_addend
? val
& 0xffff : addend_a
;
5277 // Find a GOT page entry that points to within 32KB of symbol + addend.
5278 Mips_address value
= (psymval
->value(object
, addend
) + 0x8000) & ~0xffff;
5279 unsigned int got_offset
=
5280 target
->got_section()->get_got_page_offset(value
, object
);
5282 Valtype x
= target
->got_section()->gp_offset(got_offset
, object
);
5283 val
= Bits
<32>::bit_select32(val
, x
, 0xffff);
5287 *calculated_value
= x
;
5288 return This::STATUS_OKAY
;
5291 elfcpp::Swap
<32, big_endian
>::writeval(wv
, val
);
5293 return check_overflow
<16>(x
);
5296 // R_MIPS_GOT_OFST, R_MICROMIPS_GOT_OFST
5297 static inline typename
This::Status
5298 relgotofst(Target_mips
<size
, big_endian
>* target
, unsigned char* view
,
5299 const Mips_relobj
<size
, big_endian
>* object
,
5300 const Symbol_value
<size
>* psymval
, Mips_address addend_a
,
5301 bool extract_addend
, bool local
, bool calculate_only
,
5302 Valtype
* calculated_value
)
5304 Valtype32
* wv
= reinterpret_cast<Valtype32
*>(view
);
5305 Valtype32 val
= elfcpp::Swap
<32, big_endian
>::readval(view
);
5306 Valtype addend
= extract_addend
? val
& 0xffff : addend_a
;
5308 // For a local symbol, find a GOT page entry that points to within 32KB of
5309 // symbol + addend. Relocation value is the offset of the GOT page entry's
5310 // value from symbol + addend.
5311 // For a global symbol, relocation value is addend.
5315 // Find GOT page entry.
5316 Mips_address value
= ((psymval
->value(object
, addend
) + 0x8000)
5318 target
->got_section()->get_got_page_offset(value
, object
);
5320 x
= psymval
->value(object
, addend
) - value
;
5324 val
= Bits
<32>::bit_select32(val
, x
, 0xffff);
5328 *calculated_value
= x
;
5329 return This::STATUS_OKAY
;
5332 elfcpp::Swap
<32, big_endian
>::writeval(wv
, val
);
5334 return check_overflow
<16>(x
);
5337 // R_MIPS_GOT_HI16, R_MIPS_CALL_HI16,
5338 // R_MICROMIPS_GOT_HI16, R_MICROMIPS_CALL_HI16
5339 static inline typename
This::Status
5340 relgot_hi16(unsigned char* view
, int gp_offset
, bool calculate_only
,
5341 Valtype
* calculated_value
)
5343 Valtype32
* wv
= reinterpret_cast<Valtype32
*>(view
);
5344 Valtype32 val
= elfcpp::Swap
<32, big_endian
>::readval(wv
);
5345 Valtype x
= gp_offset
;
5346 x
= ((x
+ 0x8000) >> 16) & 0xffff;
5347 val
= Bits
<32>::bit_select32(val
, x
, 0xffff);
5350 *calculated_value
= x
;
5352 elfcpp::Swap
<32, big_endian
>::writeval(wv
, val
);
5354 return This::STATUS_OKAY
;
5357 // R_MIPS_GOT_LO16, R_MIPS_CALL_LO16,
5358 // R_MICROMIPS_GOT_LO16, R_MICROMIPS_CALL_LO16
5359 static inline typename
This::Status
5360 relgot_lo16(unsigned char* view
, int gp_offset
, bool calculate_only
,
5361 Valtype
* calculated_value
)
5363 Valtype32
* wv
= reinterpret_cast<Valtype32
*>(view
);
5364 Valtype32 val
= elfcpp::Swap
<32, big_endian
>::readval(wv
);
5365 Valtype x
= gp_offset
;
5366 val
= Bits
<32>::bit_select32(val
, x
, 0xffff);
5369 *calculated_value
= x
;
5371 elfcpp::Swap
<32, big_endian
>::writeval(wv
, val
);
5373 return This::STATUS_OKAY
;
5376 // R_MIPS_GPREL16, R_MIPS16_GPREL, R_MIPS_LITERAL, R_MICROMIPS_LITERAL
5377 // R_MICROMIPS_GPREL7_S2, R_MICROMIPS_GPREL16
5378 static inline typename
This::Status
5379 relgprel(unsigned char* view
, const Mips_relobj
<size
, big_endian
>* object
,
5380 const Symbol_value
<size
>* psymval
, Mips_address gp
,
5381 Mips_address addend_a
, bool extract_addend
, bool local
,
5382 unsigned int r_type
, bool calculate_only
,
5383 Valtype
* calculated_value
)
5385 Valtype32
* wv
= reinterpret_cast<Valtype32
*>(view
);
5386 Valtype32 val
= elfcpp::Swap
<32, big_endian
>::readval(wv
);
5391 if (r_type
== elfcpp::R_MICROMIPS_GPREL7_S2
)
5392 addend
= (val
& 0x7f) << 2;
5394 addend
= val
& 0xffff;
5395 // Only sign-extend the addend if it was extracted from the
5396 // instruction. If the addend was separate, leave it alone,
5397 // otherwise we may lose significant bits.
5398 addend
= Bits
<16>::sign_extend32(addend
);
5403 Valtype x
= psymval
->value(object
, addend
) - gp
;
5405 // If the symbol was local, any earlier relocatable links will
5406 // have adjusted its addend with the gp offset, so compensate
5407 // for that now. Don't do it for symbols forced local in this
5408 // link, though, since they won't have had the gp offset applied
5411 x
+= object
->gp_value();
5413 if (r_type
== elfcpp::R_MICROMIPS_GPREL7_S2
)
5414 val
= Bits
<32>::bit_select32(val
, x
, 0x7f);
5416 val
= Bits
<32>::bit_select32(val
, x
, 0xffff);
5420 *calculated_value
= x
;
5421 return This::STATUS_OKAY
;
5424 elfcpp::Swap
<32, big_endian
>::writeval(wv
, val
);
5426 if (check_overflow
<16>(x
) == This::STATUS_OVERFLOW
)
5428 gold_error(_("small-data section exceeds 64KB; lower small-data size "
5429 "limit (see option -G)"));
5430 return This::STATUS_OVERFLOW
;
5432 return This::STATUS_OKAY
;
5436 static inline typename
This::Status
5437 relgprel32(unsigned char* view
, const Mips_relobj
<size
, big_endian
>* object
,
5438 const Symbol_value
<size
>* psymval
, Mips_address gp
,
5439 Mips_address addend_a
, bool extract_addend
, bool calculate_only
,
5440 Valtype
* calculated_value
)
5442 Valtype32
* wv
= reinterpret_cast<Valtype32
*>(view
);
5443 Valtype32 val
= elfcpp::Swap
<32, big_endian
>::readval(wv
);
5444 Valtype addend
= extract_addend
? val
: addend_a
;
5446 // R_MIPS_GPREL32 relocations are defined for local symbols only.
5447 Valtype x
= psymval
->value(object
, addend
) + object
->gp_value() - gp
;
5450 *calculated_value
= x
;
5452 elfcpp::Swap
<32, big_endian
>::writeval(wv
, x
);
5454 return This::STATUS_OKAY
;
5457 // R_MIPS_TLS_TPREL_HI16, R_MIPS16_TLS_TPREL_HI16, R_MICROMIPS_TLS_TPREL_HI16
5458 // R_MIPS_TLS_DTPREL_HI16, R_MIPS16_TLS_DTPREL_HI16,
5459 // R_MICROMIPS_TLS_DTPREL_HI16
5460 static inline typename
This::Status
5461 tlsrelhi16(unsigned char* view
, const Mips_relobj
<size
, big_endian
>* object
,
5462 const Symbol_value
<size
>* psymval
, Valtype32 tp_offset
,
5463 Mips_address addend_a
, bool extract_addend
, bool calculate_only
,
5464 Valtype
* calculated_value
)
5466 Valtype32
* wv
= reinterpret_cast<Valtype32
*>(view
);
5467 Valtype32 val
= elfcpp::Swap
<32, big_endian
>::readval(wv
);
5468 Valtype addend
= extract_addend
? val
& 0xffff : addend_a
;
5470 // tls symbol values are relative to tls_segment()->vaddr()
5471 Valtype x
= ((psymval
->value(object
, addend
) - tp_offset
) + 0x8000) >> 16;
5472 val
= Bits
<32>::bit_select32(val
, x
, 0xffff);
5475 *calculated_value
= x
;
5477 elfcpp::Swap
<32, big_endian
>::writeval(wv
, val
);
5479 return This::STATUS_OKAY
;
5482 // R_MIPS_TLS_TPREL_LO16, R_MIPS16_TLS_TPREL_LO16, R_MICROMIPS_TLS_TPREL_LO16,
5483 // R_MIPS_TLS_DTPREL_LO16, R_MIPS16_TLS_DTPREL_LO16,
5484 // R_MICROMIPS_TLS_DTPREL_LO16,
5485 static inline typename
This::Status
5486 tlsrello16(unsigned char* view
, const Mips_relobj
<size
, big_endian
>* object
,
5487 const Symbol_value
<size
>* psymval
, Valtype32 tp_offset
,
5488 Mips_address addend_a
, bool extract_addend
, bool calculate_only
,
5489 Valtype
* calculated_value
)
5491 Valtype32
* wv
= reinterpret_cast<Valtype32
*>(view
);
5492 Valtype32 val
= elfcpp::Swap
<32, big_endian
>::readval(wv
);
5493 Valtype addend
= extract_addend
? val
& 0xffff : addend_a
;
5495 // tls symbol values are relative to tls_segment()->vaddr()
5496 Valtype x
= psymval
->value(object
, addend
) - tp_offset
;
5497 val
= Bits
<32>::bit_select32(val
, x
, 0xffff);
5500 *calculated_value
= x
;
5502 elfcpp::Swap
<32, big_endian
>::writeval(wv
, val
);
5504 return This::STATUS_OKAY
;
5507 // R_MIPS_TLS_TPREL32, R_MIPS_TLS_TPREL64,
5508 // R_MIPS_TLS_DTPREL32, R_MIPS_TLS_DTPREL64
5509 static inline typename
This::Status
5510 tlsrel32(unsigned char* view
, const Mips_relobj
<size
, big_endian
>* object
,
5511 const Symbol_value
<size
>* psymval
, Valtype32 tp_offset
,
5512 Mips_address addend_a
, bool extract_addend
, bool calculate_only
,
5513 Valtype
* calculated_value
)
5515 Valtype32
* wv
= reinterpret_cast<Valtype32
*>(view
);
5516 Valtype32 val
= elfcpp::Swap
<32, big_endian
>::readval(wv
);
5517 Valtype addend
= extract_addend
? val
: addend_a
;
5519 // tls symbol values are relative to tls_segment()->vaddr()
5520 Valtype x
= psymval
->value(object
, addend
) - tp_offset
;
5523 *calculated_value
= x
;
5525 elfcpp::Swap
<32, big_endian
>::writeval(wv
, x
);
5527 return This::STATUS_OKAY
;
5530 // R_MIPS_SUB, R_MICROMIPS_SUB
5531 static inline typename
This::Status
5532 relsub(unsigned char* view
, const Mips_relobj
<size
, big_endian
>* object
,
5533 const Symbol_value
<size
>* psymval
, Mips_address addend_a
,
5534 bool extract_addend
, bool calculate_only
, Valtype
* calculated_value
)
5536 Valtype64
* wv
= reinterpret_cast<Valtype64
*>(view
);
5537 Valtype64 addend
= (extract_addend
5538 ? elfcpp::Swap
<64, big_endian
>::readval(wv
)
5541 Valtype64 x
= psymval
->value(object
, -addend
);
5543 *calculated_value
= x
;
5545 elfcpp::Swap
<64, big_endian
>::writeval(wv
, x
);
5547 return This::STATUS_OKAY
;
5551 static inline typename
This::Status
5552 rel64(unsigned char* view
, const Mips_relobj
<size
, big_endian
>* object
,
5553 const Symbol_value
<size
>* psymval
, Mips_address addend_a
,
5554 bool extract_addend
, bool calculate_only
, Valtype
* calculated_value
,
5555 bool apply_addend_only
)
5557 Valtype64
* wv
= reinterpret_cast<Valtype64
*>(view
);
5558 Valtype64 addend
= (extract_addend
5559 ? elfcpp::Swap
<64, big_endian
>::readval(wv
)
5562 Valtype64 x
= psymval
->value(object
, addend
);
5564 *calculated_value
= x
;
5567 if (apply_addend_only
)
5569 elfcpp::Swap
<64, big_endian
>::writeval(wv
, x
);
5572 return This::STATUS_OKAY
;
5575 // R_MIPS_HIGHER, R_MICROMIPS_HIGHER
5576 static inline typename
This::Status
5577 relhigher(unsigned char* view
, const Mips_relobj
<size
, big_endian
>* object
,
5578 const Symbol_value
<size
>* psymval
, Mips_address addend_a
,
5579 bool extract_addend
, bool calculate_only
, Valtype
* calculated_value
)
5581 Valtype32
* wv
= reinterpret_cast<Valtype32
*>(view
);
5582 Valtype32 val
= elfcpp::Swap
<32, big_endian
>::readval(wv
);
5583 Valtype addend
= (extract_addend
? Bits
<16>::sign_extend32(val
& 0xffff)
5586 Valtype x
= psymval
->value(object
, addend
);
5587 x
= ((x
+ (uint64_t) 0x80008000) >> 32) & 0xffff;
5588 val
= Bits
<32>::bit_select32(val
, x
, 0xffff);
5591 *calculated_value
= x
;
5593 elfcpp::Swap
<32, big_endian
>::writeval(wv
, val
);
5595 return This::STATUS_OKAY
;
5598 // R_MIPS_HIGHEST, R_MICROMIPS_HIGHEST
5599 static inline typename
This::Status
5600 relhighest(unsigned char* view
, const Mips_relobj
<size
, big_endian
>* object
,
5601 const Symbol_value
<size
>* psymval
, Mips_address addend_a
,
5602 bool extract_addend
, bool calculate_only
,
5603 Valtype
* calculated_value
)
5605 Valtype32
* wv
= reinterpret_cast<Valtype32
*>(view
);
5606 Valtype32 val
= elfcpp::Swap
<32, big_endian
>::readval(wv
);
5607 Valtype addend
= (extract_addend
? Bits
<16>::sign_extend32(val
& 0xffff)
5610 Valtype x
= psymval
->value(object
, addend
);
5611 x
= ((x
+ (uint64_t) 0x800080008000) >> 48) & 0xffff;
5612 val
= Bits
<32>::bit_select32(val
, x
, 0xffff);
5615 *calculated_value
= x
;
5617 elfcpp::Swap
<32, big_endian
>::writeval(wv
, val
);
5619 return This::STATUS_OKAY
;
5623 template<int size
, bool big_endian
>
5624 typename
std::list
<reloc_high
<size
, big_endian
> >
5625 Mips_relocate_functions
<size
, big_endian
>::hi16_relocs
;
5627 template<int size
, bool big_endian
>
5628 typename
std::list
<reloc_high
<size
, big_endian
> >
5629 Mips_relocate_functions
<size
, big_endian
>::got16_relocs
;
5631 template<int size
, bool big_endian
>
5632 typename
std::list
<reloc_high
<size
, big_endian
> >
5633 Mips_relocate_functions
<size
, big_endian
>::pchi16_relocs
;
5635 // Mips_got_info methods.
5637 // Reserve GOT entry for a GOT relocation of type R_TYPE against symbol
5638 // SYMNDX + ADDEND, where SYMNDX is a local symbol in section SHNDX in OBJECT.
5640 template<int size
, bool big_endian
>
5642 Mips_got_info
<size
, big_endian
>::record_local_got_symbol(
5643 Mips_relobj
<size
, big_endian
>* object
, unsigned int symndx
,
5644 Mips_address addend
, unsigned int r_type
, unsigned int shndx
,
5645 bool is_section_symbol
)
5647 Mips_got_entry
<size
, big_endian
>* entry
=
5648 new Mips_got_entry
<size
, big_endian
>(object
, symndx
, addend
,
5649 mips_elf_reloc_tls_type(r_type
),
5650 shndx
, is_section_symbol
);
5651 this->record_got_entry(entry
, object
);
5654 // Reserve GOT entry for a GOT relocation of type R_TYPE against MIPS_SYM,
5655 // in OBJECT. FOR_CALL is true if the caller is only interested in
5656 // using the GOT entry for calls. DYN_RELOC is true if R_TYPE is a dynamic
5659 template<int size
, bool big_endian
>
5661 Mips_got_info
<size
, big_endian
>::record_global_got_symbol(
5662 Mips_symbol
<size
>* mips_sym
, Mips_relobj
<size
, big_endian
>* object
,
5663 unsigned int r_type
, bool dyn_reloc
, bool for_call
)
5666 mips_sym
->set_got_not_only_for_calls();
5668 // A global symbol in the GOT must also be in the dynamic symbol table.
5669 if (!mips_sym
->needs_dynsym_entry() && !mips_sym
->is_forced_local())
5671 switch (mips_sym
->visibility())
5673 case elfcpp::STV_INTERNAL
:
5674 case elfcpp::STV_HIDDEN
:
5675 mips_sym
->set_is_forced_local();
5678 mips_sym
->set_needs_dynsym_entry();
5683 unsigned char tls_type
= mips_elf_reloc_tls_type(r_type
);
5684 if (tls_type
== GOT_TLS_NONE
)
5685 this->global_got_symbols_
.insert(mips_sym
);
5689 if (mips_sym
->global_got_area() == GGA_NONE
)
5690 mips_sym
->set_global_got_area(GGA_RELOC_ONLY
);
5694 Mips_got_entry
<size
, big_endian
>* entry
=
5695 new Mips_got_entry
<size
, big_endian
>(mips_sym
, tls_type
);
5697 this->record_got_entry(entry
, object
);
5700 // Add ENTRY to master GOT and to OBJECT's GOT.
5702 template<int size
, bool big_endian
>
5704 Mips_got_info
<size
, big_endian
>::record_got_entry(
5705 Mips_got_entry
<size
, big_endian
>* entry
,
5706 Mips_relobj
<size
, big_endian
>* object
)
5708 this->got_entries_
.insert(entry
);
5710 // Create the GOT entry for the OBJECT's GOT.
5711 Mips_got_info
<size
, big_endian
>* g
= object
->get_or_create_got_info();
5712 Mips_got_entry
<size
, big_endian
>* entry2
=
5713 new Mips_got_entry
<size
, big_endian
>(*entry
);
5715 g
->got_entries_
.insert(entry2
);
5718 // Record that OBJECT has a page relocation against symbol SYMNDX and
5719 // that ADDEND is the addend for that relocation.
5720 // This function creates an upper bound on the number of GOT slots
5721 // required; no attempt is made to combine references to non-overridable
5722 // global symbols across multiple input files.
5724 template<int size
, bool big_endian
>
5726 Mips_got_info
<size
, big_endian
>::record_got_page_entry(
5727 Mips_relobj
<size
, big_endian
>* object
, unsigned int symndx
, int addend
)
5729 struct Got_page_range
**range_ptr
, *range
;
5730 int old_pages
, new_pages
;
5732 // Find the Got_page_entry for this symbol.
5733 Got_page_entry
* entry
= new Got_page_entry(object
, symndx
);
5734 typename
Got_page_entry_set::iterator it
=
5735 this->got_page_entries_
.find(entry
);
5736 if (it
!= this->got_page_entries_
.end())
5739 this->got_page_entries_
.insert(entry
);
5741 // Add the same entry to the OBJECT's GOT.
5742 Got_page_entry
* entry2
= NULL
;
5743 Mips_got_info
<size
, big_endian
>* g2
= object
->get_or_create_got_info();
5744 if (g2
->got_page_entries_
.find(entry
) == g2
->got_page_entries_
.end())
5746 entry2
= new Got_page_entry(*entry
);
5747 g2
->got_page_entries_
.insert(entry2
);
5750 // Skip over ranges whose maximum extent cannot share a page entry
5752 range_ptr
= &entry
->ranges
;
5753 while (*range_ptr
&& addend
> (*range_ptr
)->max_addend
+ 0xffff)
5754 range_ptr
= &(*range_ptr
)->next
;
5756 // If we scanned to the end of the list, or found a range whose
5757 // minimum extent cannot share a page entry with ADDEND, create
5758 // a new singleton range.
5760 if (!range
|| addend
< range
->min_addend
- 0xffff)
5762 range
= new Got_page_range();
5763 range
->next
= *range_ptr
;
5764 range
->min_addend
= addend
;
5765 range
->max_addend
= addend
;
5770 ++entry2
->num_pages
;
5771 ++this->page_gotno_
;
5776 // Remember how many pages the old range contributed.
5777 old_pages
= range
->get_max_pages();
5779 // Update the ranges.
5780 if (addend
< range
->min_addend
)
5781 range
->min_addend
= addend
;
5782 else if (addend
> range
->max_addend
)
5784 if (range
->next
&& addend
>= range
->next
->min_addend
- 0xffff)
5786 old_pages
+= range
->next
->get_max_pages();
5787 range
->max_addend
= range
->next
->max_addend
;
5788 range
->next
= range
->next
->next
;
5791 range
->max_addend
= addend
;
5794 // Record any change in the total estimate.
5795 new_pages
= range
->get_max_pages();
5796 if (old_pages
!= new_pages
)
5798 entry
->num_pages
+= new_pages
- old_pages
;
5800 entry2
->num_pages
+= new_pages
- old_pages
;
5801 this->page_gotno_
+= new_pages
- old_pages
;
5802 g2
->page_gotno_
+= new_pages
- old_pages
;
5806 // Create all entries that should be in the local part of the GOT.
5808 template<int size
, bool big_endian
>
5810 Mips_got_info
<size
, big_endian
>::add_local_entries(
5811 Target_mips
<size
, big_endian
>* target
, Layout
* layout
)
5813 Mips_output_data_got
<size
, big_endian
>* got
= target
->got_section();
5814 // First two GOT entries are reserved. The first entry will be filled at
5815 // runtime. The second entry will be used by some runtime loaders.
5816 got
->add_constant(0);
5817 got
->add_constant(target
->mips_elf_gnu_got1_mask());
5819 for (typename
Got_entry_set::iterator
5820 p
= this->got_entries_
.begin();
5821 p
!= this->got_entries_
.end();
5824 Mips_got_entry
<size
, big_endian
>* entry
= *p
;
5825 if (entry
->is_for_local_symbol() && !entry
->is_tls_entry())
5827 got
->add_local(entry
->object(), entry
->symndx(),
5828 GOT_TYPE_STANDARD
, entry
->addend());
5829 unsigned int got_offset
= entry
->object()->local_got_offset(
5830 entry
->symndx(), GOT_TYPE_STANDARD
, entry
->addend());
5831 if (got
->multi_got() && this->index_
> 0
5832 && parameters
->options().output_is_position_independent())
5834 if (!entry
->is_section_symbol())
5835 target
->rel_dyn_section(layout
)->add_local(entry
->object(),
5836 entry
->symndx(), elfcpp::R_MIPS_REL32
, got
, got_offset
);
5838 target
->rel_dyn_section(layout
)->add_symbolless_local_addend(
5839 entry
->object(), entry
->symndx(), elfcpp::R_MIPS_REL32
,
5845 this->add_page_entries(target
, layout
);
5847 // Add global entries that should be in the local area.
5848 for (typename
Got_entry_set::iterator
5849 p
= this->got_entries_
.begin();
5850 p
!= this->got_entries_
.end();
5853 Mips_got_entry
<size
, big_endian
>* entry
= *p
;
5854 if (!entry
->is_for_global_symbol())
5857 Mips_symbol
<size
>* mips_sym
= entry
->sym();
5858 if (mips_sym
->global_got_area() == GGA_NONE
&& !entry
->is_tls_entry())
5860 unsigned int got_type
;
5861 if (!got
->multi_got())
5862 got_type
= GOT_TYPE_STANDARD
;
5864 got_type
= GOT_TYPE_STANDARD_MULTIGOT
+ this->index_
;
5865 if (got
->add_global(mips_sym
, got_type
))
5867 mips_sym
->set_global_gotoffset(mips_sym
->got_offset(got_type
));
5868 if (got
->multi_got() && this->index_
> 0
5869 && parameters
->options().output_is_position_independent())
5870 target
->rel_dyn_section(layout
)->add_symbolless_global_addend(
5871 mips_sym
, elfcpp::R_MIPS_REL32
, got
,
5872 mips_sym
->got_offset(got_type
));
5878 // Create GOT page entries.
5880 template<int size
, bool big_endian
>
5882 Mips_got_info
<size
, big_endian
>::add_page_entries(
5883 Target_mips
<size
, big_endian
>* target
, Layout
* layout
)
5885 if (this->page_gotno_
== 0)
5888 Mips_output_data_got
<size
, big_endian
>* got
= target
->got_section();
5889 this->got_page_offset_start_
= got
->add_constant(0);
5890 if (got
->multi_got() && this->index_
> 0
5891 && parameters
->options().output_is_position_independent())
5892 target
->rel_dyn_section(layout
)->add_absolute(elfcpp::R_MIPS_REL32
, got
,
5893 this->got_page_offset_start_
);
5894 int num_entries
= this->page_gotno_
;
5895 unsigned int prev_offset
= this->got_page_offset_start_
;
5896 while (--num_entries
> 0)
5898 unsigned int next_offset
= got
->add_constant(0);
5899 if (got
->multi_got() && this->index_
> 0
5900 && parameters
->options().output_is_position_independent())
5901 target
->rel_dyn_section(layout
)->add_absolute(elfcpp::R_MIPS_REL32
, got
,
5903 gold_assert(next_offset
== prev_offset
+ size
/8);
5904 prev_offset
= next_offset
;
5906 this->got_page_offset_next_
= this->got_page_offset_start_
;
5909 // Create global GOT entries, both GGA_NORMAL and GGA_RELOC_ONLY.
5911 template<int size
, bool big_endian
>
5913 Mips_got_info
<size
, big_endian
>::add_global_entries(
5914 Target_mips
<size
, big_endian
>* target
, Layout
* layout
,
5915 unsigned int non_reloc_only_global_gotno
)
5917 Mips_output_data_got
<size
, big_endian
>* got
= target
->got_section();
5918 // Add GGA_NORMAL entries.
5919 unsigned int count
= 0;
5920 for (typename
Got_entry_set::iterator
5921 p
= this->got_entries_
.begin();
5922 p
!= this->got_entries_
.end();
5925 Mips_got_entry
<size
, big_endian
>* entry
= *p
;
5926 if (!entry
->is_for_global_symbol())
5929 Mips_symbol
<size
>* mips_sym
= entry
->sym();
5930 if (mips_sym
->global_got_area() != GGA_NORMAL
)
5933 unsigned int got_type
;
5934 if (!got
->multi_got())
5935 got_type
= GOT_TYPE_STANDARD
;
5937 // In multi-GOT links, global symbol can be in both primary and
5938 // secondary GOT(s). By creating custom GOT type
5939 // (GOT_TYPE_STANDARD_MULTIGOT + got_index) we ensure that symbol
5940 // is added to secondary GOT(s).
5941 got_type
= GOT_TYPE_STANDARD_MULTIGOT
+ this->index_
;
5942 if (!got
->add_global(mips_sym
, got_type
))
5945 mips_sym
->set_global_gotoffset(mips_sym
->got_offset(got_type
));
5946 if (got
->multi_got() && this->index_
== 0)
5948 if (got
->multi_got() && this->index_
> 0)
5950 if (parameters
->options().output_is_position_independent()
5951 || (!parameters
->doing_static_link()
5952 && mips_sym
->is_from_dynobj() && !mips_sym
->is_undefined()))
5954 target
->rel_dyn_section(layout
)->add_global(
5955 mips_sym
, elfcpp::R_MIPS_REL32
, got
,
5956 mips_sym
->got_offset(got_type
));
5957 got
->add_secondary_got_reloc(mips_sym
->got_offset(got_type
),
5958 elfcpp::R_MIPS_REL32
, mips_sym
);
5963 if (!got
->multi_got() || this->index_
== 0)
5965 if (got
->multi_got())
5967 // We need to allocate space in the primary GOT for GGA_NORMAL entries
5968 // of secondary GOTs, to ensure that GOT offsets of GGA_RELOC_ONLY
5969 // entries correspond to dynamic symbol indexes.
5970 while (count
< non_reloc_only_global_gotno
)
5972 got
->add_constant(0);
5977 // Add GGA_RELOC_ONLY entries.
5978 got
->add_reloc_only_entries();
5982 // Create global GOT entries that should be in the GGA_RELOC_ONLY area.
5984 template<int size
, bool big_endian
>
5986 Mips_got_info
<size
, big_endian
>::add_reloc_only_entries(
5987 Mips_output_data_got
<size
, big_endian
>* got
)
5989 for (typename
Global_got_entry_set::iterator
5990 p
= this->global_got_symbols_
.begin();
5991 p
!= this->global_got_symbols_
.end();
5994 Mips_symbol
<size
>* mips_sym
= *p
;
5995 if (mips_sym
->global_got_area() == GGA_RELOC_ONLY
)
5997 unsigned int got_type
;
5998 if (!got
->multi_got())
5999 got_type
= GOT_TYPE_STANDARD
;
6001 got_type
= GOT_TYPE_STANDARD_MULTIGOT
;
6002 if (got
->add_global(mips_sym
, got_type
))
6003 mips_sym
->set_global_gotoffset(mips_sym
->got_offset(got_type
));
6008 // Create TLS GOT entries.
6010 template<int size
, bool big_endian
>
6012 Mips_got_info
<size
, big_endian
>::add_tls_entries(
6013 Target_mips
<size
, big_endian
>* target
, Layout
* layout
)
6015 Mips_output_data_got
<size
, big_endian
>* got
= target
->got_section();
6016 // Add local tls entries.
6017 for (typename
Got_entry_set::iterator
6018 p
= this->got_entries_
.begin();
6019 p
!= this->got_entries_
.end();
6022 Mips_got_entry
<size
, big_endian
>* entry
= *p
;
6023 if (!entry
->is_tls_entry() || !entry
->is_for_local_symbol())
6026 if (entry
->tls_type() == GOT_TLS_GD
)
6028 unsigned int got_type
= GOT_TYPE_TLS_PAIR
;
6029 unsigned int r_type1
= (size
== 32 ? elfcpp::R_MIPS_TLS_DTPMOD32
6030 : elfcpp::R_MIPS_TLS_DTPMOD64
);
6031 unsigned int r_type2
= (size
== 32 ? elfcpp::R_MIPS_TLS_DTPREL32
6032 : elfcpp::R_MIPS_TLS_DTPREL64
);
6034 if (!parameters
->doing_static_link())
6036 got
->add_local_pair_with_rel(entry
->object(), entry
->symndx(),
6037 entry
->shndx(), got_type
,
6038 target
->rel_dyn_section(layout
),
6039 r_type1
, entry
->addend());
6040 unsigned int got_offset
=
6041 entry
->object()->local_got_offset(entry
->symndx(), got_type
,
6043 got
->add_static_reloc(got_offset
+ size
/8, r_type2
,
6044 entry
->object(), entry
->symndx());
6048 // We are doing a static link. Mark it as belong to module 1,
6050 unsigned int got_offset
= got
->add_constant(1);
6051 entry
->object()->set_local_got_offset(entry
->symndx(), got_type
,
6054 got
->add_constant(0);
6055 got
->add_static_reloc(got_offset
+ size
/8, r_type2
,
6056 entry
->object(), entry
->symndx());
6059 else if (entry
->tls_type() == GOT_TLS_IE
)
6061 unsigned int got_type
= GOT_TYPE_TLS_OFFSET
;
6062 unsigned int r_type
= (size
== 32 ? elfcpp::R_MIPS_TLS_TPREL32
6063 : elfcpp::R_MIPS_TLS_TPREL64
);
6064 if (!parameters
->doing_static_link())
6065 got
->add_local_with_rel(entry
->object(), entry
->symndx(), got_type
,
6066 target
->rel_dyn_section(layout
), r_type
,
6070 got
->add_local(entry
->object(), entry
->symndx(), got_type
,
6072 unsigned int got_offset
=
6073 entry
->object()->local_got_offset(entry
->symndx(), got_type
,
6075 got
->add_static_reloc(got_offset
, r_type
, entry
->object(),
6079 else if (entry
->tls_type() == GOT_TLS_LDM
)
6081 unsigned int r_type
= (size
== 32 ? elfcpp::R_MIPS_TLS_DTPMOD32
6082 : elfcpp::R_MIPS_TLS_DTPMOD64
);
6083 unsigned int got_offset
;
6084 if (!parameters
->doing_static_link())
6086 got_offset
= got
->add_constant(0);
6087 target
->rel_dyn_section(layout
)->add_local(
6088 entry
->object(), 0, r_type
, got
, got_offset
);
6091 // We are doing a static link. Just mark it as belong to module 1,
6093 got_offset
= got
->add_constant(1);
6095 got
->add_constant(0);
6096 got
->set_tls_ldm_offset(got_offset
, entry
->object());
6102 // Add global tls entries.
6103 for (typename
Got_entry_set::iterator
6104 p
= this->got_entries_
.begin();
6105 p
!= this->got_entries_
.end();
6108 Mips_got_entry
<size
, big_endian
>* entry
= *p
;
6109 if (!entry
->is_tls_entry() || !entry
->is_for_global_symbol())
6112 Mips_symbol
<size
>* mips_sym
= entry
->sym();
6113 if (entry
->tls_type() == GOT_TLS_GD
)
6115 unsigned int got_type
;
6116 if (!got
->multi_got())
6117 got_type
= GOT_TYPE_TLS_PAIR
;
6119 got_type
= GOT_TYPE_TLS_PAIR_MULTIGOT
+ this->index_
;
6120 unsigned int r_type1
= (size
== 32 ? elfcpp::R_MIPS_TLS_DTPMOD32
6121 : elfcpp::R_MIPS_TLS_DTPMOD64
);
6122 unsigned int r_type2
= (size
== 32 ? elfcpp::R_MIPS_TLS_DTPREL32
6123 : elfcpp::R_MIPS_TLS_DTPREL64
);
6124 if (!parameters
->doing_static_link())
6125 got
->add_global_pair_with_rel(mips_sym
, got_type
,
6126 target
->rel_dyn_section(layout
), r_type1
, r_type2
);
6129 // Add a GOT pair for for R_MIPS_TLS_GD. The creates a pair of
6130 // GOT entries. The first one is initialized to be 1, which is the
6131 // module index for the main executable and the second one 0. A
6132 // reloc of the type R_MIPS_TLS_DTPREL32/64 will be created for
6133 // the second GOT entry and will be applied by gold.
6134 unsigned int got_offset
= got
->add_constant(1);
6135 mips_sym
->set_got_offset(got_type
, got_offset
);
6136 got
->add_constant(0);
6137 got
->add_static_reloc(got_offset
+ size
/8, r_type2
, mips_sym
);
6140 else if (entry
->tls_type() == GOT_TLS_IE
)
6142 unsigned int got_type
;
6143 if (!got
->multi_got())
6144 got_type
= GOT_TYPE_TLS_OFFSET
;
6146 got_type
= GOT_TYPE_TLS_OFFSET_MULTIGOT
+ this->index_
;
6147 unsigned int r_type
= (size
== 32 ? elfcpp::R_MIPS_TLS_TPREL32
6148 : elfcpp::R_MIPS_TLS_TPREL64
);
6149 if (!parameters
->doing_static_link())
6150 got
->add_global_with_rel(mips_sym
, got_type
,
6151 target
->rel_dyn_section(layout
), r_type
);
6154 got
->add_global(mips_sym
, got_type
);
6155 unsigned int got_offset
= mips_sym
->got_offset(got_type
);
6156 got
->add_static_reloc(got_offset
, r_type
, mips_sym
);
6164 // Decide whether the symbol needs an entry in the global part of the primary
6165 // GOT, setting global_got_area accordingly. Count the number of global
6166 // symbols that are in the primary GOT only because they have dynamic
6167 // relocations R_MIPS_REL32 against them (reloc_only_gotno).
6169 template<int size
, bool big_endian
>
6171 Mips_got_info
<size
, big_endian
>::count_got_symbols(Symbol_table
* symtab
)
6173 for (typename
Global_got_entry_set::iterator
6174 p
= this->global_got_symbols_
.begin();
6175 p
!= this->global_got_symbols_
.end();
6178 Mips_symbol
<size
>* sym
= *p
;
6179 // Make a final decision about whether the symbol belongs in the
6180 // local or global GOT. Symbols that bind locally can (and in the
6181 // case of forced-local symbols, must) live in the local GOT.
6182 // Those that are aren't in the dynamic symbol table must also
6183 // live in the local GOT.
6185 if (!sym
->should_add_dynsym_entry(symtab
)
6186 || (sym
->got_only_for_calls()
6187 ? symbol_calls_local(sym
, sym
->should_add_dynsym_entry(symtab
))
6188 : symbol_references_local(sym
,
6189 sym
->should_add_dynsym_entry(symtab
))))
6190 // The symbol belongs in the local GOT. We no longer need this
6191 // entry if it was only used for relocations; those relocations
6192 // will be against the null or section symbol instead.
6193 sym
->set_global_got_area(GGA_NONE
);
6194 else if (sym
->global_got_area() == GGA_RELOC_ONLY
)
6196 ++this->reloc_only_gotno_
;
6197 ++this->global_gotno_
;
6202 // Return the offset of GOT page entry for VALUE. Initialize the entry with
6203 // VALUE if it is not initialized.
6205 template<int size
, bool big_endian
>
6207 Mips_got_info
<size
, big_endian
>::get_got_page_offset(Mips_address value
,
6208 Mips_output_data_got
<size
, big_endian
>* got
)
6210 typename
Got_page_offsets::iterator it
= this->got_page_offsets_
.find(value
);
6211 if (it
!= this->got_page_offsets_
.end())
6214 gold_assert(this->got_page_offset_next_
< this->got_page_offset_start_
6215 + (size
/8) * this->page_gotno_
);
6217 unsigned int got_offset
= this->got_page_offset_next_
;
6218 this->got_page_offsets_
[value
] = got_offset
;
6219 this->got_page_offset_next_
+= size
/8;
6220 got
->update_got_entry(got_offset
, value
);
6224 // Remove lazy-binding stubs for global symbols in this GOT.
6226 template<int size
, bool big_endian
>
6228 Mips_got_info
<size
, big_endian
>::remove_lazy_stubs(
6229 Target_mips
<size
, big_endian
>* target
)
6231 for (typename
Got_entry_set::iterator
6232 p
= this->got_entries_
.begin();
6233 p
!= this->got_entries_
.end();
6236 Mips_got_entry
<size
, big_endian
>* entry
= *p
;
6237 if (entry
->is_for_global_symbol())
6238 target
->remove_lazy_stub_entry(entry
->sym());
6242 // Count the number of GOT entries required.
6244 template<int size
, bool big_endian
>
6246 Mips_got_info
<size
, big_endian
>::count_got_entries()
6248 for (typename
Got_entry_set::iterator
6249 p
= this->got_entries_
.begin();
6250 p
!= this->got_entries_
.end();
6253 this->count_got_entry(*p
);
6257 // Count the number of GOT entries required by ENTRY. Accumulate the result.
6259 template<int size
, bool big_endian
>
6261 Mips_got_info
<size
, big_endian
>::count_got_entry(
6262 Mips_got_entry
<size
, big_endian
>* entry
)
6264 if (entry
->is_tls_entry())
6265 this->tls_gotno_
+= mips_tls_got_entries(entry
->tls_type());
6266 else if (entry
->is_for_local_symbol()
6267 || entry
->sym()->global_got_area() == GGA_NONE
)
6268 ++this->local_gotno_
;
6270 ++this->global_gotno_
;
6273 // Add FROM's GOT entries.
6275 template<int size
, bool big_endian
>
6277 Mips_got_info
<size
, big_endian
>::add_got_entries(
6278 Mips_got_info
<size
, big_endian
>* from
)
6280 for (typename
Got_entry_set::iterator
6281 p
= from
->got_entries_
.begin();
6282 p
!= from
->got_entries_
.end();
6285 Mips_got_entry
<size
, big_endian
>* entry
= *p
;
6286 if (this->got_entries_
.find(entry
) == this->got_entries_
.end())
6288 Mips_got_entry
<size
, big_endian
>* entry2
=
6289 new Mips_got_entry
<size
, big_endian
>(*entry
);
6290 this->got_entries_
.insert(entry2
);
6291 this->count_got_entry(entry
);
6296 // Add FROM's GOT page entries.
6298 template<int size
, bool big_endian
>
6300 Mips_got_info
<size
, big_endian
>::add_got_page_entries(
6301 Mips_got_info
<size
, big_endian
>* from
)
6303 for (typename
Got_page_entry_set::iterator
6304 p
= from
->got_page_entries_
.begin();
6305 p
!= from
->got_page_entries_
.end();
6308 Got_page_entry
* entry
= *p
;
6309 if (this->got_page_entries_
.find(entry
) == this->got_page_entries_
.end())
6311 Got_page_entry
* entry2
= new Got_page_entry(*entry
);
6312 this->got_page_entries_
.insert(entry2
);
6313 this->page_gotno_
+= entry
->num_pages
;
6318 // Mips_output_data_got methods.
6320 // Lay out the GOT. Add local, global and TLS entries. If GOT is
6321 // larger than 64K, create multi-GOT.
6323 template<int size
, bool big_endian
>
6325 Mips_output_data_got
<size
, big_endian
>::lay_out_got(Layout
* layout
,
6326 Symbol_table
* symtab
, const Input_objects
* input_objects
)
6328 // Decide which symbols need to go in the global part of the GOT and
6329 // count the number of reloc-only GOT symbols.
6330 this->master_got_info_
->count_got_symbols(symtab
);
6332 // Count the number of GOT entries.
6333 this->master_got_info_
->count_got_entries();
6335 unsigned int got_size
= this->master_got_info_
->got_size();
6336 if (got_size
> Target_mips
<size
, big_endian
>::MIPS_GOT_MAX_SIZE
)
6337 this->lay_out_multi_got(layout
, input_objects
);
6340 // Record that all objects use single GOT.
6341 for (Input_objects::Relobj_iterator p
= input_objects
->relobj_begin();
6342 p
!= input_objects
->relobj_end();
6345 Mips_relobj
<size
, big_endian
>* object
=
6346 Mips_relobj
<size
, big_endian
>::as_mips_relobj(*p
);
6347 if (object
->get_got_info() != NULL
)
6348 object
->set_got_info(this->master_got_info_
);
6351 this->master_got_info_
->add_local_entries(this->target_
, layout
);
6352 this->master_got_info_
->add_global_entries(this->target_
, layout
,
6354 this->master_got_info_
->add_tls_entries(this->target_
, layout
);
6358 // Create multi-GOT. For every GOT, add local, global and TLS entries.
6360 template<int size
, bool big_endian
>
6362 Mips_output_data_got
<size
, big_endian
>::lay_out_multi_got(Layout
* layout
,
6363 const Input_objects
* input_objects
)
6365 // Try to merge the GOTs of input objects together, as long as they
6366 // don't seem to exceed the maximum GOT size, choosing one of them
6367 // to be the primary GOT.
6368 this->merge_gots(input_objects
);
6370 // Every symbol that is referenced in a dynamic relocation must be
6371 // present in the primary GOT.
6372 this->primary_got_
->set_global_gotno(this->master_got_info_
->global_gotno());
6376 unsigned int offset
= 0;
6377 Mips_got_info
<size
, big_endian
>* g
= this->primary_got_
;
6381 g
->set_offset(offset
);
6383 g
->add_local_entries(this->target_
, layout
);
6385 g
->add_global_entries(this->target_
, layout
,
6386 (this->master_got_info_
->global_gotno()
6387 - this->master_got_info_
->reloc_only_gotno()));
6389 g
->add_global_entries(this->target_
, layout
, /*not used*/-1U);
6390 g
->add_tls_entries(this->target_
, layout
);
6392 // Forbid global symbols in every non-primary GOT from having
6393 // lazy-binding stubs.
6395 g
->remove_lazy_stubs(this->target_
);
6398 offset
+= g
->got_size();
6404 // Attempt to merge GOTs of different input objects. Try to use as much as
6405 // possible of the primary GOT, since it doesn't require explicit dynamic
6406 // relocations, but don't use objects that would reference global symbols
6407 // out of the addressable range. Failing the primary GOT, attempt to merge
6408 // with the current GOT, or finish the current GOT and then make make the new
6411 template<int size
, bool big_endian
>
6413 Mips_output_data_got
<size
, big_endian
>::merge_gots(
6414 const Input_objects
* input_objects
)
6416 gold_assert(this->primary_got_
== NULL
);
6417 Mips_got_info
<size
, big_endian
>* current
= NULL
;
6419 for (Input_objects::Relobj_iterator p
= input_objects
->relobj_begin();
6420 p
!= input_objects
->relobj_end();
6423 Mips_relobj
<size
, big_endian
>* object
=
6424 Mips_relobj
<size
, big_endian
>::as_mips_relobj(*p
);
6426 Mips_got_info
<size
, big_endian
>* g
= object
->get_got_info();
6430 g
->count_got_entries();
6432 // Work out the number of page, local and TLS entries.
6433 unsigned int estimate
= this->master_got_info_
->page_gotno();
6434 if (estimate
> g
->page_gotno())
6435 estimate
= g
->page_gotno();
6436 estimate
+= g
->local_gotno() + g
->tls_gotno();
6438 // We place TLS GOT entries after both locals and globals. The globals
6439 // for the primary GOT may overflow the normal GOT size limit, so be
6440 // sure not to merge a GOT which requires TLS with the primary GOT in that
6441 // case. This doesn't affect non-primary GOTs.
6442 estimate
+= (g
->tls_gotno() > 0 ? this->master_got_info_
->global_gotno()
6443 : g
->global_gotno());
6445 unsigned int max_count
=
6446 Target_mips
<size
, big_endian
>::MIPS_GOT_MAX_SIZE
/ (size
/8) - 2;
6447 if (estimate
<= max_count
)
6449 // If we don't have a primary GOT, use it as
6450 // a starting point for the primary GOT.
6451 if (!this->primary_got_
)
6453 this->primary_got_
= g
;
6457 // Try merging with the primary GOT.
6458 if (this->merge_got_with(g
, object
, this->primary_got_
))
6462 // If we can merge with the last-created GOT, do it.
6463 if (current
&& this->merge_got_with(g
, object
, current
))
6466 // Well, we couldn't merge, so create a new GOT. Don't check if it
6467 // fits; if it turns out that it doesn't, we'll get relocation
6468 // overflows anyway.
6469 g
->set_next(current
);
6473 // If we do not find any suitable primary GOT, create an empty one.
6474 if (this->primary_got_
== NULL
)
6475 this->primary_got_
= new Mips_got_info
<size
, big_endian
>();
6477 // Link primary GOT with secondary GOTs.
6478 this->primary_got_
->set_next(current
);
6481 // Consider merging FROM, which is OBJECT's GOT, into TO. Return false if
6482 // this would lead to overflow, true if they were merged successfully.
6484 template<int size
, bool big_endian
>
6486 Mips_output_data_got
<size
, big_endian
>::merge_got_with(
6487 Mips_got_info
<size
, big_endian
>* from
,
6488 Mips_relobj
<size
, big_endian
>* object
,
6489 Mips_got_info
<size
, big_endian
>* to
)
6491 // Work out how many page entries we would need for the combined GOT.
6492 unsigned int estimate
= this->master_got_info_
->page_gotno();
6493 if (estimate
>= from
->page_gotno() + to
->page_gotno())
6494 estimate
= from
->page_gotno() + to
->page_gotno();
6496 // Conservatively estimate how many local and TLS entries would be needed.
6497 estimate
+= from
->local_gotno() + to
->local_gotno();
6498 estimate
+= from
->tls_gotno() + to
->tls_gotno();
6500 // If we're merging with the primary got, any TLS relocations will
6501 // come after the full set of global entries. Otherwise estimate those
6502 // conservatively as well.
6503 if (to
== this->primary_got_
&& (from
->tls_gotno() + to
->tls_gotno()) > 0)
6504 estimate
+= this->master_got_info_
->global_gotno();
6506 estimate
+= from
->global_gotno() + to
->global_gotno();
6508 // Bail out if the combined GOT might be too big.
6509 unsigned int max_count
=
6510 Target_mips
<size
, big_endian
>::MIPS_GOT_MAX_SIZE
/ (size
/8) - 2;
6511 if (estimate
> max_count
)
6514 // Transfer the object's GOT information from FROM to TO.
6515 to
->add_got_entries(from
);
6516 to
->add_got_page_entries(from
);
6518 // Record that OBJECT should use output GOT TO.
6519 object
->set_got_info(to
);
6524 // Write out the GOT.
6526 template<int size
, bool big_endian
>
6528 Mips_output_data_got
<size
, big_endian
>::do_write(Output_file
* of
)
6530 typedef Unordered_set
<Mips_symbol
<size
>*, Mips_symbol_hash
<size
> >
6531 Mips_stubs_entry_set
;
6533 // Call parent to write out GOT.
6534 Output_data_got
<size
, big_endian
>::do_write(of
);
6536 const off_t offset
= this->offset();
6537 const section_size_type oview_size
=
6538 convert_to_section_size_type(this->data_size());
6539 unsigned char* const oview
= of
->get_output_view(offset
, oview_size
);
6541 // Needed for fixing values of .got section.
6542 this->got_view_
= oview
;
6544 // Write lazy stub addresses.
6545 for (typename
Mips_stubs_entry_set::iterator
6546 p
= this->master_got_info_
->global_got_symbols().begin();
6547 p
!= this->master_got_info_
->global_got_symbols().end();
6550 Mips_symbol
<size
>* mips_sym
= *p
;
6551 if (mips_sym
->has_lazy_stub())
6553 Valtype
* wv
= reinterpret_cast<Valtype
*>(
6554 oview
+ this->get_primary_got_offset(mips_sym
));
6556 this->target_
->mips_stubs_section()->stub_address(mips_sym
);
6557 elfcpp::Swap
<size
, big_endian
>::writeval(wv
, value
);
6561 // Add +1 to GGA_NONE nonzero MIPS16 and microMIPS entries.
6562 for (typename
Mips_stubs_entry_set::iterator
6563 p
= this->master_got_info_
->global_got_symbols().begin();
6564 p
!= this->master_got_info_
->global_got_symbols().end();
6567 Mips_symbol
<size
>* mips_sym
= *p
;
6568 if (!this->multi_got()
6569 && (mips_sym
->is_mips16() || mips_sym
->is_micromips())
6570 && mips_sym
->global_got_area() == GGA_NONE
6571 && mips_sym
->has_got_offset(GOT_TYPE_STANDARD
))
6573 Valtype
* wv
= reinterpret_cast<Valtype
*>(
6574 oview
+ mips_sym
->got_offset(GOT_TYPE_STANDARD
));
6575 Valtype value
= elfcpp::Swap
<size
, big_endian
>::readval(wv
);
6579 elfcpp::Swap
<size
, big_endian
>::writeval(wv
, value
);
6584 if (!this->secondary_got_relocs_
.empty())
6586 // Fixup for the secondary GOT R_MIPS_REL32 relocs. For global
6587 // secondary GOT entries with non-zero initial value copy the value
6588 // to the corresponding primary GOT entry, and set the secondary GOT
6590 // TODO(sasa): This is workaround. It needs to be investigated further.
6592 for (size_t i
= 0; i
< this->secondary_got_relocs_
.size(); ++i
)
6594 Static_reloc
& reloc(this->secondary_got_relocs_
[i
]);
6595 if (reloc
.symbol_is_global())
6597 Mips_symbol
<size
>* gsym
= reloc
.symbol();
6598 gold_assert(gsym
!= NULL
);
6600 unsigned got_offset
= reloc
.got_offset();
6601 gold_assert(got_offset
< oview_size
);
6603 // Find primary GOT entry.
6604 Valtype
* wv_prim
= reinterpret_cast<Valtype
*>(
6605 oview
+ this->get_primary_got_offset(gsym
));
6607 // Find secondary GOT entry.
6608 Valtype
* wv_sec
= reinterpret_cast<Valtype
*>(oview
+ got_offset
);
6610 Valtype value
= elfcpp::Swap
<size
, big_endian
>::readval(wv_sec
);
6613 elfcpp::Swap
<size
, big_endian
>::writeval(wv_prim
, value
);
6614 elfcpp::Swap
<size
, big_endian
>::writeval(wv_sec
, 0);
6615 gsym
->set_applied_secondary_got_fixup();
6620 of
->write_output_view(offset
, oview_size
, oview
);
6623 // We are done if there is no fix up.
6624 if (this->static_relocs_
.empty())
6627 Output_segment
* tls_segment
= this->layout_
->tls_segment();
6628 gold_assert(tls_segment
!= NULL
);
6630 for (size_t i
= 0; i
< this->static_relocs_
.size(); ++i
)
6632 Static_reloc
& reloc(this->static_relocs_
[i
]);
6635 if (!reloc
.symbol_is_global())
6637 Sized_relobj_file
<size
, big_endian
>* object
= reloc
.relobj();
6638 const Symbol_value
<size
>* psymval
=
6639 object
->local_symbol(reloc
.index());
6641 // We are doing static linking. Issue an error and skip this
6642 // relocation if the symbol is undefined or in a discarded_section.
6644 unsigned int shndx
= psymval
->input_shndx(&is_ordinary
);
6645 if ((shndx
== elfcpp::SHN_UNDEF
)
6647 && shndx
!= elfcpp::SHN_UNDEF
6648 && !object
->is_section_included(shndx
)
6649 && !this->symbol_table_
->is_section_folded(object
, shndx
)))
6651 gold_error(_("undefined or discarded local symbol %u from "
6652 " object %s in GOT"),
6653 reloc
.index(), reloc
.relobj()->name().c_str());
6657 value
= psymval
->value(object
, 0);
6661 const Mips_symbol
<size
>* gsym
= reloc
.symbol();
6662 gold_assert(gsym
!= NULL
);
6664 // We are doing static linking. Issue an error and skip this
6665 // relocation if the symbol is undefined or in a discarded_section
6666 // unless it is a weakly_undefined symbol.
6667 if ((gsym
->is_defined_in_discarded_section() || gsym
->is_undefined())
6668 && !gsym
->is_weak_undefined())
6670 gold_error(_("undefined or discarded symbol %s in GOT"),
6675 if (!gsym
->is_weak_undefined())
6676 value
= gsym
->value();
6681 unsigned got_offset
= reloc
.got_offset();
6682 gold_assert(got_offset
< oview_size
);
6684 Valtype
* wv
= reinterpret_cast<Valtype
*>(oview
+ got_offset
);
6687 switch (reloc
.r_type())
6689 case elfcpp::R_MIPS_TLS_DTPMOD32
:
6690 case elfcpp::R_MIPS_TLS_DTPMOD64
:
6693 case elfcpp::R_MIPS_TLS_DTPREL32
:
6694 case elfcpp::R_MIPS_TLS_DTPREL64
:
6695 x
= value
- elfcpp::DTP_OFFSET
;
6697 case elfcpp::R_MIPS_TLS_TPREL32
:
6698 case elfcpp::R_MIPS_TLS_TPREL64
:
6699 x
= value
- elfcpp::TP_OFFSET
;
6706 elfcpp::Swap
<size
, big_endian
>::writeval(wv
, x
);
6709 of
->write_output_view(offset
, oview_size
, oview
);
6712 // Mips_relobj methods.
6714 // Count the local symbols. The Mips backend needs to know if a symbol
6715 // is a MIPS16 or microMIPS function or not. For global symbols, it is easy
6716 // because the Symbol object keeps the ELF symbol type and st_other field.
6717 // For local symbol it is harder because we cannot access this information.
6718 // So we override the do_count_local_symbol in parent and scan local symbols to
6719 // mark MIPS16 and microMIPS functions. This is not the most efficient way but
6720 // I do not want to slow down other ports by calling a per symbol target hook
6721 // inside Sized_relobj_file<size, big_endian>::do_count_local_symbols.
6723 template<int size
, bool big_endian
>
6725 Mips_relobj
<size
, big_endian
>::do_count_local_symbols(
6726 Stringpool_template
<char>* pool
,
6727 Stringpool_template
<char>* dynpool
)
6729 // Ask parent to count the local symbols.
6730 Sized_relobj_file
<size
, big_endian
>::do_count_local_symbols(pool
, dynpool
);
6731 const unsigned int loccount
= this->local_symbol_count();
6735 // Initialize the mips16 and micromips function bit-vector.
6736 this->local_symbol_is_mips16_
.resize(loccount
, false);
6737 this->local_symbol_is_micromips_
.resize(loccount
, false);
6739 // Read the symbol table section header.
6740 const unsigned int symtab_shndx
= this->symtab_shndx();
6741 elfcpp::Shdr
<size
, big_endian
>
6742 symtabshdr(this, this->elf_file()->section_header(symtab_shndx
));
6743 gold_assert(symtabshdr
.get_sh_type() == elfcpp::SHT_SYMTAB
);
6745 // Read the local symbols.
6746 const int sym_size
= elfcpp::Elf_sizes
<size
>::sym_size
;
6747 gold_assert(loccount
== symtabshdr
.get_sh_info());
6748 off_t locsize
= loccount
* sym_size
;
6749 const unsigned char* psyms
= this->get_view(symtabshdr
.get_sh_offset(),
6750 locsize
, true, true);
6752 // Loop over the local symbols and mark any MIPS16 or microMIPS local symbols.
6754 // Skip the first dummy symbol.
6756 for (unsigned int i
= 1; i
< loccount
; ++i
, psyms
+= sym_size
)
6758 elfcpp::Sym
<size
, big_endian
> sym(psyms
);
6759 unsigned char st_other
= sym
.get_st_other();
6760 this->local_symbol_is_mips16_
[i
] = elfcpp::elf_st_is_mips16(st_other
);
6761 this->local_symbol_is_micromips_
[i
] =
6762 elfcpp::elf_st_is_micromips(st_other
);
6766 // Read the symbol information.
6768 template<int size
, bool big_endian
>
6770 Mips_relobj
<size
, big_endian
>::do_read_symbols(Read_symbols_data
* sd
)
6772 // Call parent class to read symbol information.
6773 this->base_read_symbols(sd
);
6775 // Read processor-specific flags in ELF file header.
6776 const unsigned char* pehdr
= this->get_view(elfcpp::file_header_offset
,
6777 elfcpp::Elf_sizes
<size
>::ehdr_size
,
6779 elfcpp::Ehdr
<size
, big_endian
> ehdr(pehdr
);
6780 this->processor_specific_flags_
= ehdr
.get_e_flags();
6782 // Get the section names.
6783 const unsigned char* pnamesu
= sd
->section_names
->data();
6784 const char* pnames
= reinterpret_cast<const char*>(pnamesu
);
6786 // Initialize the mips16 stub section bit-vectors.
6787 this->section_is_mips16_fn_stub_
.resize(this->shnum(), false);
6788 this->section_is_mips16_call_stub_
.resize(this->shnum(), false);
6789 this->section_is_mips16_call_fp_stub_
.resize(this->shnum(), false);
6791 const size_t shdr_size
= elfcpp::Elf_sizes
<size
>::shdr_size
;
6792 const unsigned char* pshdrs
= sd
->section_headers
->data();
6793 const unsigned char* ps
= pshdrs
+ shdr_size
;
6794 for (unsigned int i
= 1; i
< this->shnum(); ++i
, ps
+= shdr_size
)
6796 elfcpp::Shdr
<size
, big_endian
> shdr(ps
);
6798 if (shdr
.get_sh_type() == elfcpp::SHT_MIPS_REGINFO
)
6800 this->has_reginfo_section_
= true;
6801 // Read the gp value that was used to create this object. We need the
6802 // gp value while processing relocs. The .reginfo section is not used
6803 // in the 64-bit MIPS ELF ABI.
6804 section_offset_type section_offset
= shdr
.get_sh_offset();
6805 section_size_type section_size
=
6806 convert_to_section_size_type(shdr
.get_sh_size());
6807 const unsigned char* view
=
6808 this->get_view(section_offset
, section_size
, true, false);
6810 this->gp_
= elfcpp::Swap
<size
, big_endian
>::readval(view
+ 20);
6812 // Read the rest of .reginfo.
6813 this->gprmask_
= elfcpp::Swap
<size
, big_endian
>::readval(view
);
6814 this->cprmask1_
= elfcpp::Swap
<size
, big_endian
>::readval(view
+ 4);
6815 this->cprmask2_
= elfcpp::Swap
<size
, big_endian
>::readval(view
+ 8);
6816 this->cprmask3_
= elfcpp::Swap
<size
, big_endian
>::readval(view
+ 12);
6817 this->cprmask4_
= elfcpp::Swap
<size
, big_endian
>::readval(view
+ 16);
6820 if (shdr
.get_sh_type() == elfcpp::SHT_GNU_ATTRIBUTES
)
6822 gold_assert(this->attributes_section_data_
== NULL
);
6823 section_offset_type section_offset
= shdr
.get_sh_offset();
6824 section_size_type section_size
=
6825 convert_to_section_size_type(shdr
.get_sh_size());
6826 const unsigned char* view
=
6827 this->get_view(section_offset
, section_size
, true, false);
6828 this->attributes_section_data_
=
6829 new Attributes_section_data(view
, section_size
);
6832 if (shdr
.get_sh_type() == elfcpp::SHT_MIPS_ABIFLAGS
)
6834 gold_assert(this->abiflags_
== NULL
);
6835 section_offset_type section_offset
= shdr
.get_sh_offset();
6836 section_size_type section_size
=
6837 convert_to_section_size_type(shdr
.get_sh_size());
6838 const unsigned char* view
=
6839 this->get_view(section_offset
, section_size
, true, false);
6840 this->abiflags_
= new Mips_abiflags
<big_endian
>();
6842 this->abiflags_
->version
=
6843 elfcpp::Swap
<16, big_endian
>::readval(view
);
6844 if (this->abiflags_
->version
!= 0)
6846 gold_error(_("%s: .MIPS.abiflags section has "
6847 "unsupported version %u"),
6848 this->name().c_str(),
6849 this->abiflags_
->version
);
6852 this->abiflags_
->isa_level
=
6853 elfcpp::Swap
<8, big_endian
>::readval(view
+ 2);
6854 this->abiflags_
->isa_rev
=
6855 elfcpp::Swap
<8, big_endian
>::readval(view
+ 3);
6856 this->abiflags_
->gpr_size
=
6857 elfcpp::Swap
<8, big_endian
>::readval(view
+ 4);
6858 this->abiflags_
->cpr1_size
=
6859 elfcpp::Swap
<8, big_endian
>::readval(view
+ 5);
6860 this->abiflags_
->cpr2_size
=
6861 elfcpp::Swap
<8, big_endian
>::readval(view
+ 6);
6862 this->abiflags_
->fp_abi
=
6863 elfcpp::Swap
<8, big_endian
>::readval(view
+ 7);
6864 this->abiflags_
->isa_ext
=
6865 elfcpp::Swap
<32, big_endian
>::readval(view
+ 8);
6866 this->abiflags_
->ases
=
6867 elfcpp::Swap
<32, big_endian
>::readval(view
+ 12);
6868 this->abiflags_
->flags1
=
6869 elfcpp::Swap
<32, big_endian
>::readval(view
+ 16);
6870 this->abiflags_
->flags2
=
6871 elfcpp::Swap
<32, big_endian
>::readval(view
+ 20);
6874 // In the 64-bit ABI, .MIPS.options section holds register information.
6875 // A SHT_MIPS_OPTIONS section contains a series of options, each of which
6876 // starts with this header:
6880 // // Type of option.
6881 // unsigned char kind[1];
6882 // // Size of option descriptor, including header.
6883 // unsigned char size[1];
6884 // // Section index of affected section, or 0 for global option.
6885 // unsigned char section[2];
6886 // // Information specific to this kind of option.
6887 // unsigned char info[4];
6890 // For a SHT_MIPS_OPTIONS section, look for a ODK_REGINFO entry, and set
6891 // the gp value based on what we find. We may see both SHT_MIPS_REGINFO
6892 // and SHT_MIPS_OPTIONS/ODK_REGINFO; in that case, they should agree.
6894 if (shdr
.get_sh_type() == elfcpp::SHT_MIPS_OPTIONS
)
6896 section_offset_type section_offset
= shdr
.get_sh_offset();
6897 section_size_type section_size
=
6898 convert_to_section_size_type(shdr
.get_sh_size());
6899 const unsigned char* view
=
6900 this->get_view(section_offset
, section_size
, true, false);
6901 const unsigned char* end
= view
+ section_size
;
6903 while (view
+ 8 <= end
)
6905 unsigned char kind
= elfcpp::Swap
<8, big_endian
>::readval(view
);
6906 unsigned char sz
= elfcpp::Swap
<8, big_endian
>::readval(view
+ 1);
6909 gold_error(_("%s: Warning: bad `%s' option size %u smaller "
6911 this->name().c_str(),
6912 this->mips_elf_options_section_name(), sz
);
6916 if (this->is_n64() && kind
== elfcpp::ODK_REGINFO
)
6918 // In the 64 bit ABI, an ODK_REGINFO option is the following
6919 // structure. The info field of the options header is not
6924 // // Mask of general purpose registers used.
6925 // unsigned char ri_gprmask[4];
6927 // unsigned char ri_pad[4];
6928 // // Mask of co-processor registers used.
6929 // unsigned char ri_cprmask[4][4];
6930 // // GP register value for this object file.
6931 // unsigned char ri_gp_value[8];
6934 this->gp_
= elfcpp::Swap
<size
, big_endian
>::readval(view
6937 else if (kind
== elfcpp::ODK_REGINFO
)
6939 // In the 32 bit ABI, an ODK_REGINFO option is the following
6940 // structure. The info field of the options header is not
6941 // used. The same structure is used in .reginfo section.
6945 // unsigned char ri_gprmask[4];
6946 // unsigned char ri_cprmask[4][4];
6947 // unsigned char ri_gp_value[4];
6950 this->gp_
= elfcpp::Swap
<size
, big_endian
>::readval(view
6957 const char* name
= pnames
+ shdr
.get_sh_name();
6958 this->section_is_mips16_fn_stub_
[i
] = is_prefix_of(".mips16.fn", name
);
6959 this->section_is_mips16_call_stub_
[i
] =
6960 is_prefix_of(".mips16.call.", name
);
6961 this->section_is_mips16_call_fp_stub_
[i
] =
6962 is_prefix_of(".mips16.call.fp.", name
);
6964 if (strcmp(name
, ".pdr") == 0)
6966 gold_assert(this->pdr_shndx_
== -1U);
6967 this->pdr_shndx_
= i
;
6972 // Discard MIPS16 stub secions that are not needed.
6974 template<int size
, bool big_endian
>
6976 Mips_relobj
<size
, big_endian
>::discard_mips16_stub_sections(Symbol_table
* symtab
)
6978 for (typename
Mips16_stubs_int_map::const_iterator
6979 it
= this->mips16_stub_sections_
.begin();
6980 it
!= this->mips16_stub_sections_
.end(); ++it
)
6982 Mips16_stub_section
<size
, big_endian
>* stub_section
= it
->second
;
6983 if (!stub_section
->is_target_found())
6985 gold_error(_("no relocation found in mips16 stub section '%s'"),
6986 stub_section
->object()
6987 ->section_name(stub_section
->shndx()).c_str());
6990 bool discard
= false;
6991 if (stub_section
->is_for_local_function())
6993 if (stub_section
->is_fn_stub())
6995 // This stub is for a local symbol. This stub will only
6996 // be needed if there is some relocation in this object,
6997 // other than a 16 bit function call, which refers to this
6999 if (!this->has_local_non_16bit_call_relocs(stub_section
->r_sym()))
7002 this->add_local_mips16_fn_stub(stub_section
);
7006 // This stub is for a local symbol. This stub will only
7007 // be needed if there is some relocation (R_MIPS16_26) in
7008 // this object that refers to this symbol.
7009 gold_assert(stub_section
->is_call_stub()
7010 || stub_section
->is_call_fp_stub());
7011 if (!this->has_local_16bit_call_relocs(stub_section
->r_sym()))
7014 this->add_local_mips16_call_stub(stub_section
);
7019 Mips_symbol
<size
>* gsym
= stub_section
->gsym();
7020 if (stub_section
->is_fn_stub())
7022 if (gsym
->has_mips16_fn_stub())
7023 // We already have a stub for this function.
7027 gsym
->set_mips16_fn_stub(stub_section
);
7028 if (gsym
->should_add_dynsym_entry(symtab
))
7030 // If we have a MIPS16 function with a stub, the
7031 // dynamic symbol must refer to the stub, since only
7032 // the stub uses the standard calling conventions.
7033 gsym
->set_need_fn_stub();
7034 if (gsym
->is_from_dynobj())
7035 gsym
->set_needs_dynsym_value();
7038 if (!gsym
->need_fn_stub())
7041 else if (stub_section
->is_call_stub())
7043 if (gsym
->is_mips16())
7044 // We don't need the call_stub; this is a 16 bit
7045 // function, so calls from other 16 bit functions are
7048 else if (gsym
->has_mips16_call_stub())
7049 // We already have a stub for this function.
7052 gsym
->set_mips16_call_stub(stub_section
);
7056 gold_assert(stub_section
->is_call_fp_stub());
7057 if (gsym
->is_mips16())
7058 // We don't need the call_stub; this is a 16 bit
7059 // function, so calls from other 16 bit functions are
7062 else if (gsym
->has_mips16_call_fp_stub())
7063 // We already have a stub for this function.
7066 gsym
->set_mips16_call_fp_stub(stub_section
);
7070 this->set_output_section(stub_section
->shndx(), NULL
);
7074 // Mips_output_data_la25_stub methods.
7076 // Template for standard LA25 stub.
7077 template<int size
, bool big_endian
>
7079 Mips_output_data_la25_stub
<size
, big_endian
>::la25_stub_entry
[] =
7081 0x3c190000, // lui $25,%hi(func)
7082 0x08000000, // j func
7083 0x27390000, // add $25,$25,%lo(func)
7087 // Template for microMIPS LA25 stub.
7088 template<int size
, bool big_endian
>
7090 Mips_output_data_la25_stub
<size
, big_endian
>::la25_stub_micromips_entry
[] =
7092 0x41b9, 0x0000, // lui t9,%hi(func)
7093 0xd400, 0x0000, // j func
7094 0x3339, 0x0000, // addiu t9,t9,%lo(func)
7095 0x0000, 0x0000 // nop
7098 // Create la25 stub for a symbol.
7100 template<int size
, bool big_endian
>
7102 Mips_output_data_la25_stub
<size
, big_endian
>::create_la25_stub(
7103 Symbol_table
* symtab
, Target_mips
<size
, big_endian
>* target
,
7104 Mips_symbol
<size
>* gsym
)
7106 if (!gsym
->has_la25_stub())
7108 gsym
->set_la25_stub_offset(this->symbols_
.size() * 16);
7109 this->symbols_
.push_back(gsym
);
7110 this->create_stub_symbol(gsym
, symtab
, target
, 16);
7114 // Create a symbol for SYM stub's value and size, to help make the disassembly
7117 template<int size
, bool big_endian
>
7119 Mips_output_data_la25_stub
<size
, big_endian
>::create_stub_symbol(
7120 Mips_symbol
<size
>* sym
, Symbol_table
* symtab
,
7121 Target_mips
<size
, big_endian
>* target
, uint64_t symsize
)
7123 std::string
name(".pic.");
7124 name
+= sym
->name();
7126 unsigned int offset
= sym
->la25_stub_offset();
7127 if (sym
->is_micromips())
7130 // Make it a local function.
7131 Symbol
* new_sym
= symtab
->define_in_output_data(name
.c_str(), NULL
,
7132 Symbol_table::PREDEFINED
,
7133 target
->la25_stub_section(),
7134 offset
, symsize
, elfcpp::STT_FUNC
,
7136 elfcpp::STV_DEFAULT
, 0,
7138 new_sym
->set_is_forced_local();
7141 // Write out la25 stubs. This uses the hand-coded instructions above,
7142 // and adjusts them as needed.
7144 template<int size
, bool big_endian
>
7146 Mips_output_data_la25_stub
<size
, big_endian
>::do_write(Output_file
* of
)
7148 const off_t offset
= this->offset();
7149 const section_size_type oview_size
=
7150 convert_to_section_size_type(this->data_size());
7151 unsigned char* const oview
= of
->get_output_view(offset
, oview_size
);
7153 for (typename
std::vector
<Mips_symbol
<size
>*>::iterator
7154 p
= this->symbols_
.begin();
7155 p
!= this->symbols_
.end();
7158 Mips_symbol
<size
>* sym
= *p
;
7159 unsigned char* pov
= oview
+ sym
->la25_stub_offset();
7161 Mips_address target
= sym
->value();
7162 if (!sym
->is_micromips())
7164 elfcpp::Swap
<32, big_endian
>::writeval(pov
,
7165 la25_stub_entry
[0] | (((target
+ 0x8000) >> 16) & 0xffff));
7166 elfcpp::Swap
<32, big_endian
>::writeval(pov
+ 4,
7167 la25_stub_entry
[1] | ((target
>> 2) & 0x3ffffff));
7168 elfcpp::Swap
<32, big_endian
>::writeval(pov
+ 8,
7169 la25_stub_entry
[2] | (target
& 0xffff));
7170 elfcpp::Swap
<32, big_endian
>::writeval(pov
+ 12, la25_stub_entry
[3]);
7175 // First stub instruction. Paste high 16-bits of the target.
7176 elfcpp::Swap
<16, big_endian
>::writeval(pov
,
7177 la25_stub_micromips_entry
[0]);
7178 elfcpp::Swap
<16, big_endian
>::writeval(pov
+ 2,
7179 ((target
+ 0x8000) >> 16) & 0xffff);
7180 // Second stub instruction. Paste low 26-bits of the target, shifted
7182 elfcpp::Swap
<16, big_endian
>::writeval(pov
+ 4,
7183 la25_stub_micromips_entry
[2] | ((target
>> 17) & 0x3ff));
7184 elfcpp::Swap
<16, big_endian
>::writeval(pov
+ 6,
7185 la25_stub_micromips_entry
[3] | ((target
>> 1) & 0xffff));
7186 // Third stub instruction. Paste low 16-bits of the target.
7187 elfcpp::Swap
<16, big_endian
>::writeval(pov
+ 8,
7188 la25_stub_micromips_entry
[4]);
7189 elfcpp::Swap
<16, big_endian
>::writeval(pov
+ 10, target
& 0xffff);
7190 // Fourth stub instruction.
7191 elfcpp::Swap
<16, big_endian
>::writeval(pov
+ 12,
7192 la25_stub_micromips_entry
[6]);
7193 elfcpp::Swap
<16, big_endian
>::writeval(pov
+ 14,
7194 la25_stub_micromips_entry
[7]);
7198 of
->write_output_view(offset
, oview_size
, oview
);
7201 // Mips_output_data_plt methods.
7203 // The format of the first PLT entry in an O32 executable.
7204 template<int size
, bool big_endian
>
7205 const uint32_t Mips_output_data_plt
<size
, big_endian
>::plt0_entry_o32
[] =
7207 0x3c1c0000, // lui $28, %hi(&GOTPLT[0])
7208 0x8f990000, // lw $25, %lo(&GOTPLT[0])($28)
7209 0x279c0000, // addiu $28, $28, %lo(&GOTPLT[0])
7210 0x031cc023, // subu $24, $24, $28
7211 0x03e07825, // or $15, $31, zero
7212 0x0018c082, // srl $24, $24, 2
7213 0x0320f809, // jalr $25
7214 0x2718fffe // subu $24, $24, 2
7217 // The format of the first PLT entry in an N32 executable. Different
7218 // because gp ($28) is not available; we use t2 ($14) instead.
7219 template<int size
, bool big_endian
>
7220 const uint32_t Mips_output_data_plt
<size
, big_endian
>::plt0_entry_n32
[] =
7222 0x3c0e0000, // lui $14, %hi(&GOTPLT[0])
7223 0x8dd90000, // lw $25, %lo(&GOTPLT[0])($14)
7224 0x25ce0000, // addiu $14, $14, %lo(&GOTPLT[0])
7225 0x030ec023, // subu $24, $24, $14
7226 0x03e07825, // or $15, $31, zero
7227 0x0018c082, // srl $24, $24, 2
7228 0x0320f809, // jalr $25
7229 0x2718fffe // subu $24, $24, 2
7232 // The format of the first PLT entry in an N64 executable. Different
7233 // from N32 because of the increased size of GOT entries.
7234 template<int size
, bool big_endian
>
7235 const uint32_t Mips_output_data_plt
<size
, big_endian
>::plt0_entry_n64
[] =
7237 0x3c0e0000, // lui $14, %hi(&GOTPLT[0])
7238 0xddd90000, // ld $25, %lo(&GOTPLT[0])($14)
7239 0x25ce0000, // addiu $14, $14, %lo(&GOTPLT[0])
7240 0x030ec023, // subu $24, $24, $14
7241 0x03e07825, // or $15, $31, zero
7242 0x0018c0c2, // srl $24, $24, 3
7243 0x0320f809, // jalr $25
7244 0x2718fffe // subu $24, $24, 2
7247 // The format of the microMIPS first PLT entry in an O32 executable.
7248 // We rely on v0 ($2) rather than t8 ($24) to contain the address
7249 // of the GOTPLT entry handled, so this stub may only be used when
7250 // all the subsequent PLT entries are microMIPS code too.
7252 // The trailing NOP is for alignment and correct disassembly only.
7253 template<int size
, bool big_endian
>
7254 const uint32_t Mips_output_data_plt
<size
, big_endian
>::
7255 plt0_entry_micromips_o32
[] =
7257 0x7980, 0x0000, // addiupc $3, (&GOTPLT[0]) - .
7258 0xff23, 0x0000, // lw $25, 0($3)
7259 0x0535, // subu $2, $2, $3
7260 0x2525, // srl $2, $2, 2
7261 0x3302, 0xfffe, // subu $24, $2, 2
7262 0x0dff, // move $15, $31
7263 0x45f9, // jalrs $25
7264 0x0f83, // move $28, $3
7268 // The format of the microMIPS first PLT entry in an O32 executable
7269 // in the insn32 mode.
7270 template<int size
, bool big_endian
>
7271 const uint32_t Mips_output_data_plt
<size
, big_endian
>::
7272 plt0_entry_micromips32_o32
[] =
7274 0x41bc, 0x0000, // lui $28, %hi(&GOTPLT[0])
7275 0xff3c, 0x0000, // lw $25, %lo(&GOTPLT[0])($28)
7276 0x339c, 0x0000, // addiu $28, $28, %lo(&GOTPLT[0])
7277 0x0398, 0xc1d0, // subu $24, $24, $28
7278 0x001f, 0x7a90, // or $15, $31, zero
7279 0x0318, 0x1040, // srl $24, $24, 2
7280 0x03f9, 0x0f3c, // jalr $25
7281 0x3318, 0xfffe // subu $24, $24, 2
7284 // The format of subsequent standard entries in the PLT.
7285 template<int size
, bool big_endian
>
7286 const uint32_t Mips_output_data_plt
<size
, big_endian
>::plt_entry
[] =
7288 0x3c0f0000, // lui $15, %hi(.got.plt entry)
7289 0x01f90000, // l[wd] $25, %lo(.got.plt entry)($15)
7290 0x03200008, // jr $25
7291 0x25f80000 // addiu $24, $15, %lo(.got.plt entry)
7294 // The format of subsequent R6 PLT entries.
7295 template<int size
, bool big_endian
>
7296 const uint32_t Mips_output_data_plt
<size
, big_endian
>::plt_entry_r6
[] =
7298 0x3c0f0000, // lui $15, %hi(.got.plt entry)
7299 0x01f90000, // l[wd] $25, %lo(.got.plt entry)($15)
7300 0x03200009, // jr $25
7301 0x25f80000 // addiu $24, $15, %lo(.got.plt entry)
7304 // The format of subsequent MIPS16 o32 PLT entries. We use v1 ($3) as a
7305 // temporary because t8 ($24) and t9 ($25) are not directly addressable.
7306 // Note that this differs from the GNU ld which uses both v0 ($2) and v1 ($3).
7307 // We cannot use v0 because MIPS16 call stubs from the CS toolchain expect
7308 // target function address in register v0.
7309 template<int size
, bool big_endian
>
7310 const uint32_t Mips_output_data_plt
<size
, big_endian
>::plt_entry_mips16_o32
[] =
7312 0xb303, // lw $3, 12($pc)
7313 0x651b, // move $24, $3
7314 0x9b60, // lw $3, 0($3)
7316 0x653b, // move $25, $3
7318 0x0000, 0x0000 // .word (.got.plt entry)
7321 // The format of subsequent microMIPS o32 PLT entries. We use v0 ($2)
7322 // as a temporary because t8 ($24) is not addressable with ADDIUPC.
7323 template<int size
, bool big_endian
>
7324 const uint32_t Mips_output_data_plt
<size
, big_endian
>::
7325 plt_entry_micromips_o32
[] =
7327 0x7900, 0x0000, // addiupc $2, (.got.plt entry) - .
7328 0xff22, 0x0000, // lw $25, 0($2)
7330 0x0f02 // move $24, $2
7333 // The format of subsequent microMIPS o32 PLT entries in the insn32 mode.
7334 template<int size
, bool big_endian
>
7335 const uint32_t Mips_output_data_plt
<size
, big_endian
>::
7336 plt_entry_micromips32_o32
[] =
7338 0x41af, 0x0000, // lui $15, %hi(.got.plt entry)
7339 0xff2f, 0x0000, // lw $25, %lo(.got.plt entry)($15)
7340 0x0019, 0x0f3c, // jr $25
7341 0x330f, 0x0000 // addiu $24, $15, %lo(.got.plt entry)
7344 // Add an entry to the PLT for a symbol referenced by r_type relocation.
7346 template<int size
, bool big_endian
>
7348 Mips_output_data_plt
<size
, big_endian
>::add_entry(Mips_symbol
<size
>* gsym
,
7349 unsigned int r_type
)
7351 gold_assert(!gsym
->has_plt_offset());
7353 // Final PLT offset for a symbol will be set in method set_plt_offsets().
7354 gsym
->set_plt_offset(this->entry_count() * sizeof(plt_entry
)
7355 + sizeof(plt0_entry_o32
));
7356 this->symbols_
.push_back(gsym
);
7358 // Record whether the relocation requires a standard MIPS
7359 // or a compressed code entry.
7360 if (jal_reloc(r_type
))
7362 if (r_type
== elfcpp::R_MIPS_26
)
7363 gsym
->set_needs_mips_plt(true);
7365 gsym
->set_needs_comp_plt(true);
7368 section_offset_type got_offset
= this->got_plt_
->current_data_size();
7370 // Every PLT entry needs a GOT entry which points back to the PLT
7371 // entry (this will be changed by the dynamic linker, normally
7372 // lazily when the function is called).
7373 this->got_plt_
->set_current_data_size(got_offset
+ size
/8);
7375 gsym
->set_needs_dynsym_entry();
7376 this->rel_
->add_global(gsym
, elfcpp::R_MIPS_JUMP_SLOT
, this->got_plt_
,
7380 // Set final PLT offsets. For each symbol, determine whether standard or
7381 // compressed (MIPS16 or microMIPS) PLT entry is used.
7383 template<int size
, bool big_endian
>
7385 Mips_output_data_plt
<size
, big_endian
>::set_plt_offsets()
7387 // The sizes of individual PLT entries.
7388 unsigned int plt_mips_entry_size
= this->standard_plt_entry_size();
7389 unsigned int plt_comp_entry_size
= (!this->target_
->is_output_newabi()
7390 ? this->compressed_plt_entry_size() : 0);
7392 for (typename
std::vector
<Mips_symbol
<size
>*>::const_iterator
7393 p
= this->symbols_
.begin(); p
!= this->symbols_
.end(); ++p
)
7395 Mips_symbol
<size
>* mips_sym
= *p
;
7397 // There are no defined MIPS16 or microMIPS PLT entries for n32 or n64,
7398 // so always use a standard entry there.
7400 // If the symbol has a MIPS16 call stub and gets a PLT entry, then
7401 // all MIPS16 calls will go via that stub, and there is no benefit
7402 // to having a MIPS16 entry. And in the case of call_stub a
7403 // standard entry actually has to be used as the stub ends with a J
7405 if (this->target_
->is_output_newabi()
7406 || mips_sym
->has_mips16_call_stub()
7407 || mips_sym
->has_mips16_call_fp_stub())
7409 mips_sym
->set_needs_mips_plt(true);
7410 mips_sym
->set_needs_comp_plt(false);
7413 // Otherwise, if there are no direct calls to the function, we
7414 // have a free choice of whether to use standard or compressed
7415 // entries. Prefer microMIPS entries if the object is known to
7416 // contain microMIPS code, so that it becomes possible to create
7417 // pure microMIPS binaries. Prefer standard entries otherwise,
7418 // because MIPS16 ones are no smaller and are usually slower.
7419 if (!mips_sym
->needs_mips_plt() && !mips_sym
->needs_comp_plt())
7421 if (this->target_
->is_output_micromips())
7422 mips_sym
->set_needs_comp_plt(true);
7424 mips_sym
->set_needs_mips_plt(true);
7427 if (mips_sym
->needs_mips_plt())
7429 mips_sym
->set_mips_plt_offset(this->plt_mips_offset_
);
7430 this->plt_mips_offset_
+= plt_mips_entry_size
;
7432 if (mips_sym
->needs_comp_plt())
7434 mips_sym
->set_comp_plt_offset(this->plt_comp_offset_
);
7435 this->plt_comp_offset_
+= plt_comp_entry_size
;
7439 // Figure out the size of the PLT header if we know that we are using it.
7440 if (this->plt_mips_offset_
+ this->plt_comp_offset_
!= 0)
7441 this->plt_header_size_
= this->get_plt_header_size();
7444 // Write out the PLT. This uses the hand-coded instructions above,
7445 // and adjusts them as needed.
7447 template<int size
, bool big_endian
>
7449 Mips_output_data_plt
<size
, big_endian
>::do_write(Output_file
* of
)
7451 const off_t offset
= this->offset();
7452 const section_size_type oview_size
=
7453 convert_to_section_size_type(this->data_size());
7454 unsigned char* const oview
= of
->get_output_view(offset
, oview_size
);
7456 const off_t gotplt_file_offset
= this->got_plt_
->offset();
7457 const section_size_type gotplt_size
=
7458 convert_to_section_size_type(this->got_plt_
->data_size());
7459 unsigned char* const gotplt_view
= of
->get_output_view(gotplt_file_offset
,
7461 unsigned char* pov
= oview
;
7463 Mips_address plt_address
= this->address();
7465 // Calculate the address of .got.plt.
7466 Mips_address gotplt_addr
= this->got_plt_
->address();
7467 Mips_address gotplt_addr_high
= ((gotplt_addr
+ 0x8000) >> 16) & 0xffff;
7468 Mips_address gotplt_addr_low
= gotplt_addr
& 0xffff;
7470 // The PLT sequence is not safe for N64 if .got.plt's address can
7471 // not be loaded in two instructions.
7472 gold_assert((gotplt_addr
& ~(Mips_address
) 0x7fffffff) == 0
7473 || ~(gotplt_addr
| 0x7fffffff) == 0);
7475 // Write the PLT header.
7476 const uint32_t* plt0_entry
= this->get_plt_header_entry();
7477 if (plt0_entry
== plt0_entry_micromips_o32
)
7479 // Write microMIPS PLT header.
7480 gold_assert(gotplt_addr
% 4 == 0);
7482 Mips_address gotpc_offset
= gotplt_addr
- ((plt_address
| 3) ^ 3);
7484 // ADDIUPC has a span of +/-16MB, check we're in range.
7485 if (gotpc_offset
+ 0x1000000 >= 0x2000000)
7487 gold_error(_(".got.plt offset of %ld from .plt beyond the range of "
7488 "ADDIUPC"), (long)gotpc_offset
);
7492 elfcpp::Swap
<16, big_endian
>::writeval(pov
,
7493 plt0_entry
[0] | ((gotpc_offset
>> 18) & 0x7f));
7494 elfcpp::Swap
<16, big_endian
>::writeval(pov
+ 2,
7495 (gotpc_offset
>> 2) & 0xffff);
7497 for (unsigned int i
= 2;
7498 i
< (sizeof(plt0_entry_micromips_o32
)
7499 / sizeof(plt0_entry_micromips_o32
[0]));
7502 elfcpp::Swap
<16, big_endian
>::writeval(pov
, plt0_entry
[i
]);
7506 else if (plt0_entry
== plt0_entry_micromips32_o32
)
7508 // Write microMIPS PLT header in insn32 mode.
7509 elfcpp::Swap
<16, big_endian
>::writeval(pov
, plt0_entry
[0]);
7510 elfcpp::Swap
<16, big_endian
>::writeval(pov
+ 2, gotplt_addr_high
);
7511 elfcpp::Swap
<16, big_endian
>::writeval(pov
+ 4, plt0_entry
[2]);
7512 elfcpp::Swap
<16, big_endian
>::writeval(pov
+ 6, gotplt_addr_low
);
7513 elfcpp::Swap
<16, big_endian
>::writeval(pov
+ 8, plt0_entry
[4]);
7514 elfcpp::Swap
<16, big_endian
>::writeval(pov
+ 10, gotplt_addr_low
);
7516 for (unsigned int i
= 6;
7517 i
< (sizeof(plt0_entry_micromips32_o32
)
7518 / sizeof(plt0_entry_micromips32_o32
[0]));
7521 elfcpp::Swap
<16, big_endian
>::writeval(pov
, plt0_entry
[i
]);
7527 // Write standard PLT header.
7528 elfcpp::Swap
<32, big_endian
>::writeval(pov
,
7529 plt0_entry
[0] | gotplt_addr_high
);
7530 elfcpp::Swap
<32, big_endian
>::writeval(pov
+ 4,
7531 plt0_entry
[1] | gotplt_addr_low
);
7532 elfcpp::Swap
<32, big_endian
>::writeval(pov
+ 8,
7533 plt0_entry
[2] | gotplt_addr_low
);
7535 for (int i
= 3; i
< 8; i
++)
7537 elfcpp::Swap
<32, big_endian
>::writeval(pov
, plt0_entry
[i
]);
7543 unsigned char* gotplt_pov
= gotplt_view
;
7544 unsigned int got_entry_size
= size
/8; // TODO(sasa): MIPS_ELF_GOT_SIZE
7546 // The first two entries in .got.plt are reserved.
7547 elfcpp::Swap
<size
, big_endian
>::writeval(gotplt_pov
, 0);
7548 elfcpp::Swap
<size
, big_endian
>::writeval(gotplt_pov
+ got_entry_size
, 0);
7550 unsigned int gotplt_offset
= 2 * got_entry_size
;
7551 gotplt_pov
+= 2 * got_entry_size
;
7553 // Calculate the address of the PLT header.
7554 Mips_address header_address
= (plt_address
7555 + (this->is_plt_header_compressed() ? 1 : 0));
7557 // Initialize compressed PLT area view.
7558 unsigned char* pov2
= pov
+ this->plt_mips_offset_
;
7560 // Write the PLT entries.
7561 for (typename
std::vector
<Mips_symbol
<size
>*>::const_iterator
7562 p
= this->symbols_
.begin();
7563 p
!= this->symbols_
.end();
7564 ++p
, gotplt_pov
+= got_entry_size
, gotplt_offset
+= got_entry_size
)
7566 Mips_symbol
<size
>* mips_sym
= *p
;
7568 // Calculate the address of the .got.plt entry.
7569 uint32_t gotplt_entry_addr
= (gotplt_addr
+ gotplt_offset
);
7570 uint32_t gotplt_entry_addr_hi
= (((gotplt_entry_addr
+ 0x8000) >> 16)
7572 uint32_t gotplt_entry_addr_lo
= gotplt_entry_addr
& 0xffff;
7574 // Initially point the .got.plt entry at the PLT header.
7575 if (this->target_
->is_output_n64())
7576 elfcpp::Swap
<64, big_endian
>::writeval(gotplt_pov
, header_address
);
7578 elfcpp::Swap
<32, big_endian
>::writeval(gotplt_pov
, header_address
);
7580 // Now handle the PLT itself. First the standard entry.
7581 if (mips_sym
->has_mips_plt_offset())
7583 // Pick the load opcode (LW or LD).
7584 uint64_t load
= this->target_
->is_output_n64() ? 0xdc000000
7587 const uint32_t* entry
= this->target_
->is_output_r6() ? plt_entry_r6
7590 // Fill in the PLT entry itself.
7591 elfcpp::Swap
<32, big_endian
>::writeval(pov
,
7592 entry
[0] | gotplt_entry_addr_hi
);
7593 elfcpp::Swap
<32, big_endian
>::writeval(pov
+ 4,
7594 entry
[1] | gotplt_entry_addr_lo
| load
);
7595 elfcpp::Swap
<32, big_endian
>::writeval(pov
+ 8, entry
[2]);
7596 elfcpp::Swap
<32, big_endian
>::writeval(pov
+ 12,
7597 entry
[3] | gotplt_entry_addr_lo
);
7601 // Now the compressed entry. They come after any standard ones.
7602 if (mips_sym
->has_comp_plt_offset())
7604 if (!this->target_
->is_output_micromips())
7606 // Write MIPS16 PLT entry.
7607 const uint32_t* plt_entry
= plt_entry_mips16_o32
;
7609 elfcpp::Swap
<16, big_endian
>::writeval(pov2
, plt_entry
[0]);
7610 elfcpp::Swap
<16, big_endian
>::writeval(pov2
+ 2, plt_entry
[1]);
7611 elfcpp::Swap
<16, big_endian
>::writeval(pov2
+ 4, plt_entry
[2]);
7612 elfcpp::Swap
<16, big_endian
>::writeval(pov2
+ 6, plt_entry
[3]);
7613 elfcpp::Swap
<16, big_endian
>::writeval(pov2
+ 8, plt_entry
[4]);
7614 elfcpp::Swap
<16, big_endian
>::writeval(pov2
+ 10, plt_entry
[5]);
7615 elfcpp::Swap
<32, big_endian
>::writeval(pov2
+ 12,
7619 else if (this->target_
->use_32bit_micromips_instructions())
7621 // Write microMIPS PLT entry in insn32 mode.
7622 const uint32_t* plt_entry
= plt_entry_micromips32_o32
;
7624 elfcpp::Swap
<16, big_endian
>::writeval(pov2
, plt_entry
[0]);
7625 elfcpp::Swap
<16, big_endian
>::writeval(pov2
+ 2,
7626 gotplt_entry_addr_hi
);
7627 elfcpp::Swap
<16, big_endian
>::writeval(pov2
+ 4, plt_entry
[2]);
7628 elfcpp::Swap
<16, big_endian
>::writeval(pov2
+ 6,
7629 gotplt_entry_addr_lo
);
7630 elfcpp::Swap
<16, big_endian
>::writeval(pov2
+ 8, plt_entry
[4]);
7631 elfcpp::Swap
<16, big_endian
>::writeval(pov2
+ 10, plt_entry
[5]);
7632 elfcpp::Swap
<16, big_endian
>::writeval(pov2
+ 12, plt_entry
[6]);
7633 elfcpp::Swap
<16, big_endian
>::writeval(pov2
+ 14,
7634 gotplt_entry_addr_lo
);
7639 // Write microMIPS PLT entry.
7640 const uint32_t* plt_entry
= plt_entry_micromips_o32
;
7642 gold_assert(gotplt_entry_addr
% 4 == 0);
7644 Mips_address loc_address
= plt_address
+ pov2
- oview
;
7645 int gotpc_offset
= gotplt_entry_addr
- ((loc_address
| 3) ^ 3);
7647 // ADDIUPC has a span of +/-16MB, check we're in range.
7648 if (gotpc_offset
+ 0x1000000 >= 0x2000000)
7650 gold_error(_(".got.plt offset of %ld from .plt beyond the "
7651 "range of ADDIUPC"), (long)gotpc_offset
);
7655 elfcpp::Swap
<16, big_endian
>::writeval(pov2
,
7656 plt_entry
[0] | ((gotpc_offset
>> 18) & 0x7f));
7657 elfcpp::Swap
<16, big_endian
>::writeval(
7658 pov2
+ 2, (gotpc_offset
>> 2) & 0xffff);
7659 elfcpp::Swap
<16, big_endian
>::writeval(pov2
+ 4, plt_entry
[2]);
7660 elfcpp::Swap
<16, big_endian
>::writeval(pov2
+ 6, plt_entry
[3]);
7661 elfcpp::Swap
<16, big_endian
>::writeval(pov2
+ 8, plt_entry
[4]);
7662 elfcpp::Swap
<16, big_endian
>::writeval(pov2
+ 10, plt_entry
[5]);
7668 // Check the number of bytes written for standard entries.
7669 gold_assert(static_cast<section_size_type
>(
7670 pov
- oview
- this->plt_header_size_
) == this->plt_mips_offset_
);
7671 // Check the number of bytes written for compressed entries.
7672 gold_assert((static_cast<section_size_type
>(pov2
- pov
)
7673 == this->plt_comp_offset_
));
7674 // Check the total number of bytes written.
7675 gold_assert(static_cast<section_size_type
>(pov2
- oview
) == oview_size
);
7677 gold_assert(static_cast<section_size_type
>(gotplt_pov
- gotplt_view
)
7680 of
->write_output_view(offset
, oview_size
, oview
);
7681 of
->write_output_view(gotplt_file_offset
, gotplt_size
, gotplt_view
);
7684 // Mips_output_data_mips_stubs methods.
7686 // The format of the lazy binding stub when dynamic symbol count is less than
7687 // 64K, dynamic symbol index is less than 32K, and ABI is not N64.
7688 template<int size
, bool big_endian
>
7690 Mips_output_data_mips_stubs
<size
, big_endian
>::lazy_stub_normal_1
[4] =
7692 0x8f998010, // lw t9,0x8010(gp)
7693 0x03e07825, // or t7,ra,zero
7694 0x0320f809, // jalr t9,ra
7695 0x24180000 // addiu t8,zero,DYN_INDEX sign extended
7698 // The format of the lazy binding stub when dynamic symbol count is less than
7699 // 64K, dynamic symbol index is less than 32K, and ABI is N64.
7700 template<int size
, bool big_endian
>
7702 Mips_output_data_mips_stubs
<size
, big_endian
>::lazy_stub_normal_1_n64
[4] =
7704 0xdf998010, // ld t9,0x8010(gp)
7705 0x03e07825, // or t7,ra,zero
7706 0x0320f809, // jalr t9,ra
7707 0x64180000 // daddiu t8,zero,DYN_INDEX sign extended
7710 // The format of the lazy binding stub when dynamic symbol count is less than
7711 // 64K, dynamic symbol index is between 32K and 64K, and ABI is not N64.
7712 template<int size
, bool big_endian
>
7714 Mips_output_data_mips_stubs
<size
, big_endian
>::lazy_stub_normal_2
[4] =
7716 0x8f998010, // lw t9,0x8010(gp)
7717 0x03e07825, // or t7,ra,zero
7718 0x0320f809, // jalr t9,ra
7719 0x34180000 // ori t8,zero,DYN_INDEX unsigned
7722 // The format of the lazy binding stub when dynamic symbol count is less than
7723 // 64K, dynamic symbol index is between 32K and 64K, and ABI is N64.
7724 template<int size
, bool big_endian
>
7726 Mips_output_data_mips_stubs
<size
, big_endian
>::lazy_stub_normal_2_n64
[4] =
7728 0xdf998010, // ld t9,0x8010(gp)
7729 0x03e07825, // or t7,ra,zero
7730 0x0320f809, // jalr t9,ra
7731 0x34180000 // ori t8,zero,DYN_INDEX unsigned
7734 // The format of the lazy binding stub when dynamic symbol count is greater than
7735 // 64K, and ABI is not N64.
7736 template<int size
, bool big_endian
>
7737 const uint32_t Mips_output_data_mips_stubs
<size
, big_endian
>::lazy_stub_big
[5] =
7739 0x8f998010, // lw t9,0x8010(gp)
7740 0x03e07825, // or t7,ra,zero
7741 0x3c180000, // lui t8,DYN_INDEX
7742 0x0320f809, // jalr t9,ra
7743 0x37180000 // ori t8,t8,DYN_INDEX
7746 // The format of the lazy binding stub when dynamic symbol count is greater than
7747 // 64K, and ABI is N64.
7748 template<int size
, bool big_endian
>
7750 Mips_output_data_mips_stubs
<size
, big_endian
>::lazy_stub_big_n64
[5] =
7752 0xdf998010, // ld t9,0x8010(gp)
7753 0x03e07825, // or t7,ra,zero
7754 0x3c180000, // lui t8,DYN_INDEX
7755 0x0320f809, // jalr t9,ra
7756 0x37180000 // ori t8,t8,DYN_INDEX
7761 // The format of the microMIPS lazy binding stub when dynamic symbol count is
7762 // less than 64K, dynamic symbol index is less than 32K, and ABI is not N64.
7763 template<int size
, bool big_endian
>
7765 Mips_output_data_mips_stubs
<size
, big_endian
>::lazy_stub_micromips_normal_1
[] =
7767 0xff3c, 0x8010, // lw t9,0x8010(gp)
7768 0x0dff, // move t7,ra
7770 0x3300, 0x0000 // addiu t8,zero,DYN_INDEX sign extended
7773 // The format of the microMIPS lazy binding stub when dynamic symbol count is
7774 // less than 64K, dynamic symbol index is less than 32K, and ABI is N64.
7775 template<int size
, bool big_endian
>
7777 Mips_output_data_mips_stubs
<size
, big_endian
>::
7778 lazy_stub_micromips_normal_1_n64
[] =
7780 0xdf3c, 0x8010, // ld t9,0x8010(gp)
7781 0x0dff, // move t7,ra
7783 0x5f00, 0x0000 // daddiu t8,zero,DYN_INDEX sign extended
7786 // The format of the microMIPS lazy binding stub when dynamic symbol
7787 // count is less than 64K, dynamic symbol index is between 32K and 64K,
7788 // and ABI is not N64.
7789 template<int size
, bool big_endian
>
7791 Mips_output_data_mips_stubs
<size
, big_endian
>::lazy_stub_micromips_normal_2
[] =
7793 0xff3c, 0x8010, // lw t9,0x8010(gp)
7794 0x0dff, // move t7,ra
7796 0x5300, 0x0000 // ori t8,zero,DYN_INDEX unsigned
7799 // The format of the microMIPS lazy binding stub when dynamic symbol
7800 // count is less than 64K, dynamic symbol index is between 32K and 64K,
7802 template<int size
, bool big_endian
>
7804 Mips_output_data_mips_stubs
<size
, big_endian
>::
7805 lazy_stub_micromips_normal_2_n64
[] =
7807 0xdf3c, 0x8010, // ld t9,0x8010(gp)
7808 0x0dff, // move t7,ra
7810 0x5300, 0x0000 // ori t8,zero,DYN_INDEX unsigned
7813 // The format of the microMIPS lazy binding stub when dynamic symbol count is
7814 // greater than 64K, and ABI is not N64.
7815 template<int size
, bool big_endian
>
7817 Mips_output_data_mips_stubs
<size
, big_endian
>::lazy_stub_micromips_big
[] =
7819 0xff3c, 0x8010, // lw t9,0x8010(gp)
7820 0x0dff, // move t7,ra
7821 0x41b8, 0x0000, // lui t8,DYN_INDEX
7823 0x5318, 0x0000 // ori t8,t8,DYN_INDEX
7826 // The format of the microMIPS lazy binding stub when dynamic symbol count is
7827 // greater than 64K, and ABI is N64.
7828 template<int size
, bool big_endian
>
7830 Mips_output_data_mips_stubs
<size
, big_endian
>::lazy_stub_micromips_big_n64
[] =
7832 0xdf3c, 0x8010, // ld t9,0x8010(gp)
7833 0x0dff, // move t7,ra
7834 0x41b8, 0x0000, // lui t8,DYN_INDEX
7836 0x5318, 0x0000 // ori t8,t8,DYN_INDEX
7839 // 32-bit microMIPS stubs.
7841 // The format of the microMIPS lazy binding stub when dynamic symbol count is
7842 // less than 64K, dynamic symbol index is less than 32K, ABI is not N64, and we
7843 // can use only 32-bit instructions.
7844 template<int size
, bool big_endian
>
7846 Mips_output_data_mips_stubs
<size
, big_endian
>::
7847 lazy_stub_micromips32_normal_1
[] =
7849 0xff3c, 0x8010, // lw t9,0x8010(gp)
7850 0x001f, 0x7a90, // or t7,ra,zero
7851 0x03f9, 0x0f3c, // jalr ra,t9
7852 0x3300, 0x0000 // addiu t8,zero,DYN_INDEX sign extended
7855 // The format of the microMIPS lazy binding stub when dynamic symbol count is
7856 // less than 64K, dynamic symbol index is less than 32K, ABI is N64, and we can
7857 // use only 32-bit instructions.
7858 template<int size
, bool big_endian
>
7860 Mips_output_data_mips_stubs
<size
, big_endian
>::
7861 lazy_stub_micromips32_normal_1_n64
[] =
7863 0xdf3c, 0x8010, // ld t9,0x8010(gp)
7864 0x001f, 0x7a90, // or t7,ra,zero
7865 0x03f9, 0x0f3c, // jalr ra,t9
7866 0x5f00, 0x0000 // daddiu t8,zero,DYN_INDEX sign extended
7869 // The format of the microMIPS lazy binding stub when dynamic symbol
7870 // count is less than 64K, dynamic symbol index is between 32K and 64K,
7871 // ABI is not N64, and we can use only 32-bit instructions.
7872 template<int size
, bool big_endian
>
7874 Mips_output_data_mips_stubs
<size
, big_endian
>::
7875 lazy_stub_micromips32_normal_2
[] =
7877 0xff3c, 0x8010, // lw t9,0x8010(gp)
7878 0x001f, 0x7a90, // or t7,ra,zero
7879 0x03f9, 0x0f3c, // jalr ra,t9
7880 0x5300, 0x0000 // ori t8,zero,DYN_INDEX unsigned
7883 // The format of the microMIPS lazy binding stub when dynamic symbol
7884 // count is less than 64K, dynamic symbol index is between 32K and 64K,
7885 // ABI is N64, and we can use only 32-bit instructions.
7886 template<int size
, bool big_endian
>
7888 Mips_output_data_mips_stubs
<size
, big_endian
>::
7889 lazy_stub_micromips32_normal_2_n64
[] =
7891 0xdf3c, 0x8010, // ld t9,0x8010(gp)
7892 0x001f, 0x7a90, // or t7,ra,zero
7893 0x03f9, 0x0f3c, // jalr ra,t9
7894 0x5300, 0x0000 // ori t8,zero,DYN_INDEX unsigned
7897 // The format of the microMIPS lazy binding stub when dynamic symbol count is
7898 // greater than 64K, ABI is not N64, and we can use only 32-bit instructions.
7899 template<int size
, bool big_endian
>
7901 Mips_output_data_mips_stubs
<size
, big_endian
>::lazy_stub_micromips32_big
[] =
7903 0xff3c, 0x8010, // lw t9,0x8010(gp)
7904 0x001f, 0x7a90, // or t7,ra,zero
7905 0x41b8, 0x0000, // lui t8,DYN_INDEX
7906 0x03f9, 0x0f3c, // jalr ra,t9
7907 0x5318, 0x0000 // ori t8,t8,DYN_INDEX
7910 // The format of the microMIPS lazy binding stub when dynamic symbol count is
7911 // greater than 64K, ABI is N64, and we can use only 32-bit instructions.
7912 template<int size
, bool big_endian
>
7914 Mips_output_data_mips_stubs
<size
, big_endian
>::lazy_stub_micromips32_big_n64
[] =
7916 0xdf3c, 0x8010, // ld t9,0x8010(gp)
7917 0x001f, 0x7a90, // or t7,ra,zero
7918 0x41b8, 0x0000, // lui t8,DYN_INDEX
7919 0x03f9, 0x0f3c, // jalr ra,t9
7920 0x5318, 0x0000 // ori t8,t8,DYN_INDEX
7923 // Create entry for a symbol.
7925 template<int size
, bool big_endian
>
7927 Mips_output_data_mips_stubs
<size
, big_endian
>::make_entry(
7928 Mips_symbol
<size
>* gsym
)
7930 if (!gsym
->has_lazy_stub() && !gsym
->has_plt_offset())
7932 this->symbols_
.insert(gsym
);
7933 gsym
->set_has_lazy_stub(true);
7937 // Remove entry for a symbol.
7939 template<int size
, bool big_endian
>
7941 Mips_output_data_mips_stubs
<size
, big_endian
>::remove_entry(
7942 Mips_symbol
<size
>* gsym
)
7944 if (gsym
->has_lazy_stub())
7946 this->symbols_
.erase(gsym
);
7947 gsym
->set_has_lazy_stub(false);
7951 // Set stub offsets for symbols. This method expects that the number of
7952 // entries in dynamic symbol table is set.
7954 template<int size
, bool big_endian
>
7956 Mips_output_data_mips_stubs
<size
, big_endian
>::set_lazy_stub_offsets()
7958 gold_assert(this->dynsym_count_
!= -1U);
7960 if (this->stub_offsets_are_set_
)
7963 unsigned int stub_size
= this->stub_size();
7964 unsigned int offset
= 0;
7965 for (typename
Mips_stubs_entry_set::const_iterator
7966 p
= this->symbols_
.begin();
7967 p
!= this->symbols_
.end();
7968 ++p
, offset
+= stub_size
)
7970 Mips_symbol
<size
>* mips_sym
= *p
;
7971 mips_sym
->set_lazy_stub_offset(offset
);
7973 this->stub_offsets_are_set_
= true;
7976 template<int size
, bool big_endian
>
7978 Mips_output_data_mips_stubs
<size
, big_endian
>::set_needs_dynsym_value()
7980 for (typename
Mips_stubs_entry_set::const_iterator
7981 p
= this->symbols_
.begin(); p
!= this->symbols_
.end(); ++p
)
7983 Mips_symbol
<size
>* sym
= *p
;
7984 if (sym
->is_from_dynobj())
7985 sym
->set_needs_dynsym_value();
7989 // Write out the .MIPS.stubs. This uses the hand-coded instructions and
7990 // adjusts them as needed.
7992 template<int size
, bool big_endian
>
7994 Mips_output_data_mips_stubs
<size
, big_endian
>::do_write(Output_file
* of
)
7996 const off_t offset
= this->offset();
7997 const section_size_type oview_size
=
7998 convert_to_section_size_type(this->data_size());
7999 unsigned char* const oview
= of
->get_output_view(offset
, oview_size
);
8001 bool big_stub
= this->dynsym_count_
> 0x10000;
8003 unsigned char* pov
= oview
;
8004 for (typename
Mips_stubs_entry_set::const_iterator
8005 p
= this->symbols_
.begin(); p
!= this->symbols_
.end(); ++p
)
8007 Mips_symbol
<size
>* sym
= *p
;
8008 const uint32_t* lazy_stub
;
8009 bool n64
= this->target_
->is_output_n64();
8011 if (!this->target_
->is_output_micromips())
8013 // Write standard (non-microMIPS) stub.
8016 if (sym
->dynsym_index() & ~0x7fff)
8017 // Dynsym index is between 32K and 64K.
8018 lazy_stub
= n64
? lazy_stub_normal_2_n64
: lazy_stub_normal_2
;
8020 // Dynsym index is less than 32K.
8021 lazy_stub
= n64
? lazy_stub_normal_1_n64
: lazy_stub_normal_1
;
8024 lazy_stub
= n64
? lazy_stub_big_n64
: lazy_stub_big
;
8027 elfcpp::Swap
<32, big_endian
>::writeval(pov
, lazy_stub
[i
]);
8028 elfcpp::Swap
<32, big_endian
>::writeval(pov
+ 4, lazy_stub
[i
+ 1]);
8034 // LUI instruction of the big stub. Paste high 16 bits of the
8036 elfcpp::Swap
<32, big_endian
>::writeval(pov
,
8037 lazy_stub
[i
] | ((sym
->dynsym_index() >> 16) & 0x7fff));
8041 elfcpp::Swap
<32, big_endian
>::writeval(pov
, lazy_stub
[i
]);
8042 // Last stub instruction. Paste low 16 bits of the dynsym index.
8043 elfcpp::Swap
<32, big_endian
>::writeval(pov
+ 4,
8044 lazy_stub
[i
+ 1] | (sym
->dynsym_index() & 0xffff));
8047 else if (this->target_
->use_32bit_micromips_instructions())
8049 // Write microMIPS stub in insn32 mode.
8052 if (sym
->dynsym_index() & ~0x7fff)
8053 // Dynsym index is between 32K and 64K.
8054 lazy_stub
= n64
? lazy_stub_micromips32_normal_2_n64
8055 : lazy_stub_micromips32_normal_2
;
8057 // Dynsym index is less than 32K.
8058 lazy_stub
= n64
? lazy_stub_micromips32_normal_1_n64
8059 : lazy_stub_micromips32_normal_1
;
8062 lazy_stub
= n64
? lazy_stub_micromips32_big_n64
8063 : lazy_stub_micromips32_big
;
8066 // First stub instruction. We emit 32-bit microMIPS instructions by
8067 // emitting two 16-bit parts because on microMIPS the 16-bit part of
8068 // the instruction where the opcode is must always come first, for
8069 // both little and big endian.
8070 elfcpp::Swap
<16, big_endian
>::writeval(pov
, lazy_stub
[i
]);
8071 elfcpp::Swap
<16, big_endian
>::writeval(pov
+ 2, lazy_stub
[i
+ 1]);
8072 // Second stub instruction.
8073 elfcpp::Swap
<16, big_endian
>::writeval(pov
+ 4, lazy_stub
[i
+ 2]);
8074 elfcpp::Swap
<16, big_endian
>::writeval(pov
+ 6, lazy_stub
[i
+ 3]);
8079 // LUI instruction of the big stub. Paste high 16 bits of the
8081 elfcpp::Swap
<16, big_endian
>::writeval(pov
, lazy_stub
[i
]);
8082 elfcpp::Swap
<16, big_endian
>::writeval(pov
+ 2,
8083 (sym
->dynsym_index() >> 16) & 0x7fff);
8087 elfcpp::Swap
<16, big_endian
>::writeval(pov
, lazy_stub
[i
]);
8088 elfcpp::Swap
<16, big_endian
>::writeval(pov
+ 2, lazy_stub
[i
+ 1]);
8089 // Last stub instruction. Paste low 16 bits of the dynsym index.
8090 elfcpp::Swap
<16, big_endian
>::writeval(pov
+ 4, lazy_stub
[i
+ 2]);
8091 elfcpp::Swap
<16, big_endian
>::writeval(pov
+ 6,
8092 sym
->dynsym_index() & 0xffff);
8097 // Write microMIPS stub.
8100 if (sym
->dynsym_index() & ~0x7fff)
8101 // Dynsym index is between 32K and 64K.
8102 lazy_stub
= n64
? lazy_stub_micromips_normal_2_n64
8103 : lazy_stub_micromips_normal_2
;
8105 // Dynsym index is less than 32K.
8106 lazy_stub
= n64
? lazy_stub_micromips_normal_1_n64
8107 : lazy_stub_micromips_normal_1
;
8110 lazy_stub
= n64
? lazy_stub_micromips_big_n64
8111 : lazy_stub_micromips_big
;
8114 // First stub instruction. We emit 32-bit microMIPS instructions by
8115 // emitting two 16-bit parts because on microMIPS the 16-bit part of
8116 // the instruction where the opcode is must always come first, for
8117 // both little and big endian.
8118 elfcpp::Swap
<16, big_endian
>::writeval(pov
, lazy_stub
[i
]);
8119 elfcpp::Swap
<16, big_endian
>::writeval(pov
+ 2, lazy_stub
[i
+ 1]);
8120 // Second stub instruction.
8121 elfcpp::Swap
<16, big_endian
>::writeval(pov
+ 4, lazy_stub
[i
+ 2]);
8126 // LUI instruction of the big stub. Paste high 16 bits of the
8128 elfcpp::Swap
<16, big_endian
>::writeval(pov
, lazy_stub
[i
]);
8129 elfcpp::Swap
<16, big_endian
>::writeval(pov
+ 2,
8130 (sym
->dynsym_index() >> 16) & 0x7fff);
8134 elfcpp::Swap
<16, big_endian
>::writeval(pov
, lazy_stub
[i
]);
8135 // Last stub instruction. Paste low 16 bits of the dynsym index.
8136 elfcpp::Swap
<16, big_endian
>::writeval(pov
+ 2, lazy_stub
[i
+ 1]);
8137 elfcpp::Swap
<16, big_endian
>::writeval(pov
+ 4,
8138 sym
->dynsym_index() & 0xffff);
8143 // We always allocate 20 bytes for every stub, because final dynsym count is
8144 // not known in method do_finalize_sections. There are 4 unused bytes per
8145 // stub if final dynsym count is less than 0x10000.
8146 unsigned int used
= pov
- oview
;
8147 unsigned int unused
= big_stub
? 0 : this->symbols_
.size() * 4;
8148 gold_assert(static_cast<section_size_type
>(used
+ unused
) == oview_size
);
8150 // Fill the unused space with zeroes.
8151 // TODO(sasa): Can we strip unused bytes during the relaxation?
8153 memset(pov
, 0, unused
);
8155 of
->write_output_view(offset
, oview_size
, oview
);
8158 // Mips_output_section_reginfo methods.
8160 template<int size
, bool big_endian
>
8162 Mips_output_section_reginfo
<size
, big_endian
>::do_write(Output_file
* of
)
8164 off_t offset
= this->offset();
8165 off_t data_size
= this->data_size();
8167 unsigned char* view
= of
->get_output_view(offset
, data_size
);
8168 elfcpp::Swap
<size
, big_endian
>::writeval(view
, this->gprmask_
);
8169 elfcpp::Swap
<size
, big_endian
>::writeval(view
+ 4, this->cprmask1_
);
8170 elfcpp::Swap
<size
, big_endian
>::writeval(view
+ 8, this->cprmask2_
);
8171 elfcpp::Swap
<size
, big_endian
>::writeval(view
+ 12, this->cprmask3_
);
8172 elfcpp::Swap
<size
, big_endian
>::writeval(view
+ 16, this->cprmask4_
);
8173 // Write the gp value.
8174 elfcpp::Swap
<size
, big_endian
>::writeval(view
+ 20,
8175 this->target_
->gp_value());
8177 of
->write_output_view(offset
, data_size
, view
);
8180 // Mips_output_section_abiflags methods.
8182 template<int size
, bool big_endian
>
8184 Mips_output_section_abiflags
<size
, big_endian
>::do_write(Output_file
* of
)
8186 off_t offset
= this->offset();
8187 off_t data_size
= this->data_size();
8189 unsigned char* view
= of
->get_output_view(offset
, data_size
);
8190 elfcpp::Swap
<16, big_endian
>::writeval(view
, this->abiflags_
.version
);
8191 elfcpp::Swap
<8, big_endian
>::writeval(view
+ 2, this->abiflags_
.isa_level
);
8192 elfcpp::Swap
<8, big_endian
>::writeval(view
+ 3, this->abiflags_
.isa_rev
);
8193 elfcpp::Swap
<8, big_endian
>::writeval(view
+ 4, this->abiflags_
.gpr_size
);
8194 elfcpp::Swap
<8, big_endian
>::writeval(view
+ 5, this->abiflags_
.cpr1_size
);
8195 elfcpp::Swap
<8, big_endian
>::writeval(view
+ 6, this->abiflags_
.cpr2_size
);
8196 elfcpp::Swap
<8, big_endian
>::writeval(view
+ 7, this->abiflags_
.fp_abi
);
8197 elfcpp::Swap
<32, big_endian
>::writeval(view
+ 8, this->abiflags_
.isa_ext
);
8198 elfcpp::Swap
<32, big_endian
>::writeval(view
+ 12, this->abiflags_
.ases
);
8199 elfcpp::Swap
<32, big_endian
>::writeval(view
+ 16, this->abiflags_
.flags1
);
8200 elfcpp::Swap
<32, big_endian
>::writeval(view
+ 20, this->abiflags_
.flags2
);
8202 of
->write_output_view(offset
, data_size
, view
);
8205 // Mips_copy_relocs methods.
8207 // Emit any saved relocs.
8209 template<int sh_type
, int size
, bool big_endian
>
8211 Mips_copy_relocs
<sh_type
, size
, big_endian
>::emit_mips(
8212 Output_data_reloc
<sh_type
, true, size
, big_endian
>* reloc_section
,
8213 Symbol_table
* symtab
, Layout
* layout
, Target_mips
<size
, big_endian
>* target
)
8215 for (typename Copy_relocs
<sh_type
, size
, big_endian
>::
8216 Copy_reloc_entries::iterator p
= this->entries_
.begin();
8217 p
!= this->entries_
.end();
8219 emit_entry(*p
, reloc_section
, symtab
, layout
, target
);
8221 // We no longer need the saved information.
8222 this->entries_
.clear();
8225 // Emit the reloc if appropriate.
8227 template<int sh_type
, int size
, bool big_endian
>
8229 Mips_copy_relocs
<sh_type
, size
, big_endian
>::emit_entry(
8230 Copy_reloc_entry
& entry
,
8231 Output_data_reloc
<sh_type
, true, size
, big_endian
>* reloc_section
,
8232 Symbol_table
* symtab
, Layout
* layout
, Target_mips
<size
, big_endian
>* target
)
8234 // If the symbol is no longer defined in a dynamic object, then we
8235 // emitted a COPY relocation, and we do not want to emit this
8236 // dynamic relocation.
8237 if (!entry
.sym_
->is_from_dynobj())
8240 bool can_make_dynamic
= (entry
.reloc_type_
== elfcpp::R_MIPS_32
8241 || entry
.reloc_type_
== elfcpp::R_MIPS_REL32
8242 || entry
.reloc_type_
== elfcpp::R_MIPS_64
);
8244 Mips_symbol
<size
>* sym
= Mips_symbol
<size
>::as_mips_sym(entry
.sym_
);
8245 if (can_make_dynamic
&& !sym
->has_static_relocs())
8247 Mips_relobj
<size
, big_endian
>* object
=
8248 Mips_relobj
<size
, big_endian
>::as_mips_relobj(entry
.relobj_
);
8249 target
->got_section(symtab
, layout
)->record_global_got_symbol(
8250 sym
, object
, entry
.reloc_type_
, true, false);
8251 if (!symbol_references_local(sym
, sym
->should_add_dynsym_entry(symtab
)))
8252 target
->rel_dyn_section(layout
)->add_global(sym
, elfcpp::R_MIPS_REL32
,
8253 entry
.output_section_
, entry
.relobj_
, entry
.shndx_
, entry
.address_
);
8255 target
->rel_dyn_section(layout
)->add_symbolless_global_addend(
8256 sym
, elfcpp::R_MIPS_REL32
, entry
.output_section_
, entry
.relobj_
,
8257 entry
.shndx_
, entry
.address_
);
8260 this->make_copy_reloc(symtab
, layout
,
8261 static_cast<Sized_symbol
<size
>*>(entry
.sym_
),
8266 // Target_mips methods.
8268 // Return the value to use for a dynamic symbol which requires special
8269 // treatment. This is how we support equality comparisons of function
8270 // pointers across shared library boundaries, as described in the
8271 // processor specific ABI supplement.
8273 template<int size
, bool big_endian
>
8275 Target_mips
<size
, big_endian
>::do_dynsym_value(const Symbol
* gsym
) const
8278 const Mips_symbol
<size
>* mips_sym
= Mips_symbol
<size
>::as_mips_sym(gsym
);
8280 if (!mips_sym
->has_lazy_stub())
8282 if (mips_sym
->has_plt_offset())
8284 // We distinguish between PLT entries and lazy-binding stubs by
8285 // giving the former an st_other value of STO_MIPS_PLT. Set the
8286 // value to the stub address if there are any relocations in the
8287 // binary where pointer equality matters.
8288 if (mips_sym
->pointer_equality_needed())
8290 // Prefer a standard MIPS PLT entry.
8291 if (mips_sym
->has_mips_plt_offset())
8292 value
= this->plt_section()->mips_entry_address(mips_sym
);
8294 value
= this->plt_section()->comp_entry_address(mips_sym
) + 1;
8302 // First, set stub offsets for symbols. This method expects that the
8303 // number of entries in dynamic symbol table is set.
8304 this->mips_stubs_section()->set_lazy_stub_offsets();
8306 // The run-time linker uses the st_value field of the symbol
8307 // to reset the global offset table entry for this external
8308 // to its stub address when unlinking a shared object.
8309 value
= this->mips_stubs_section()->stub_address(mips_sym
);
8312 if (mips_sym
->has_mips16_fn_stub())
8314 // If we have a MIPS16 function with a stub, the dynamic symbol must
8315 // refer to the stub, since only the stub uses the standard calling
8317 value
= mips_sym
->template
8318 get_mips16_fn_stub
<big_endian
>()->output_address();
8324 // Get the dynamic reloc section, creating it if necessary. It's always
8325 // .rel.dyn, even for MIPS64.
8327 template<int size
, bool big_endian
>
8328 typename Target_mips
<size
, big_endian
>::Reloc_section
*
8329 Target_mips
<size
, big_endian
>::rel_dyn_section(Layout
* layout
)
8331 if (this->rel_dyn_
== NULL
)
8333 gold_assert(layout
!= NULL
);
8334 this->rel_dyn_
= new Reloc_section(parameters
->options().combreloc());
8335 layout
->add_output_section_data(".rel.dyn", elfcpp::SHT_REL
,
8336 elfcpp::SHF_ALLOC
, this->rel_dyn_
,
8337 ORDER_DYNAMIC_RELOCS
, false);
8339 // First entry in .rel.dyn has to be null.
8340 // This is hack - we define dummy output data and set its address to 0,
8341 // and define absolute R_MIPS_NONE relocation with offset 0 against it.
8342 // This ensures that the entry is null.
8343 Output_data
* od
= new Output_data_zero_fill(0, 0);
8345 this->rel_dyn_
->add_absolute(elfcpp::R_MIPS_NONE
, od
, 0);
8347 return this->rel_dyn_
;
8350 // Get the GOT section, creating it if necessary.
8352 template<int size
, bool big_endian
>
8353 Mips_output_data_got
<size
, big_endian
>*
8354 Target_mips
<size
, big_endian
>::got_section(Symbol_table
* symtab
,
8357 if (this->got_
== NULL
)
8359 gold_assert(symtab
!= NULL
&& layout
!= NULL
);
8361 this->got_
= new Mips_output_data_got
<size
, big_endian
>(this, symtab
,
8363 layout
->add_output_section_data(".got", elfcpp::SHT_PROGBITS
,
8364 (elfcpp::SHF_ALLOC
| elfcpp::SHF_WRITE
|
8365 elfcpp::SHF_MIPS_GPREL
),
8366 this->got_
, ORDER_DATA
, false);
8368 // Define _GLOBAL_OFFSET_TABLE_ at the start of the .got section.
8369 symtab
->define_in_output_data("_GLOBAL_OFFSET_TABLE_", NULL
,
8370 Symbol_table::PREDEFINED
,
8372 0, 0, elfcpp::STT_OBJECT
,
8374 elfcpp::STV_HIDDEN
, 0,
8381 // Calculate value of _gp symbol.
8383 template<int size
, bool big_endian
>
8385 Target_mips
<size
, big_endian
>::set_gp(Layout
* layout
, Symbol_table
* symtab
)
8387 gold_assert(this->gp_
== NULL
);
8389 Sized_symbol
<size
>* gp
=
8390 static_cast<Sized_symbol
<size
>*>(symtab
->lookup("_gp"));
8392 // Set _gp symbol if the linker script hasn't created it.
8393 if (gp
== NULL
|| gp
->source() != Symbol::IS_CONSTANT
)
8395 // If there is no .got section, gp should be based on .sdata.
8396 Output_data
* gp_section
= (this->got_
!= NULL
8397 ? this->got_
->output_section()
8398 : layout
->find_output_section(".sdata"));
8400 if (gp_section
!= NULL
)
8401 gp
= static_cast<Sized_symbol
<size
>*>(symtab
->define_in_output_data(
8402 "_gp", NULL
, Symbol_table::PREDEFINED
,
8403 gp_section
, MIPS_GP_OFFSET
, 0,
8406 elfcpp::STV_DEFAULT
,
8413 // Set the dynamic symbol indexes. INDEX is the index of the first
8414 // global dynamic symbol. Pointers to the symbols are stored into the
8415 // vector SYMS. The names are added to DYNPOOL. This returns an
8416 // updated dynamic symbol index.
8418 template<int size
, bool big_endian
>
8420 Target_mips
<size
, big_endian
>::do_set_dynsym_indexes(
8421 std::vector
<Symbol
*>* dyn_symbols
, unsigned int index
,
8422 std::vector
<Symbol
*>* syms
, Stringpool
* dynpool
,
8423 Versions
* versions
, Symbol_table
* symtab
) const
8425 std::vector
<Symbol
*> non_got_symbols
;
8426 std::vector
<Symbol
*> got_symbols
;
8428 reorder_dyn_symbols
<size
, big_endian
>(dyn_symbols
, &non_got_symbols
,
8431 for (std::vector
<Symbol
*>::iterator p
= non_got_symbols
.begin();
8432 p
!= non_got_symbols
.end();
8437 // Note that SYM may already have a dynamic symbol index, since
8438 // some symbols appear more than once in the symbol table, with
8439 // and without a version.
8441 if (!sym
->has_dynsym_index())
8443 sym
->set_dynsym_index(index
);
8445 syms
->push_back(sym
);
8446 dynpool
->add(sym
->name(), false, NULL
);
8448 // Record any version information.
8449 if (sym
->version() != NULL
)
8450 versions
->record_version(symtab
, dynpool
, sym
);
8452 // If the symbol is defined in a dynamic object and is
8453 // referenced in a regular object, then mark the dynamic
8454 // object as needed. This is used to implement --as-needed.
8455 if (sym
->is_from_dynobj() && sym
->in_reg())
8456 sym
->object()->set_is_needed();
8460 for (std::vector
<Symbol
*>::iterator p
= got_symbols
.begin();
8461 p
!= got_symbols
.end();
8465 if (!sym
->has_dynsym_index())
8467 // Record any version information.
8468 if (sym
->version() != NULL
)
8469 versions
->record_version(symtab
, dynpool
, sym
);
8473 index
= versions
->finalize(symtab
, index
, syms
);
8475 int got_sym_count
= 0;
8476 for (std::vector
<Symbol
*>::iterator p
= got_symbols
.begin();
8477 p
!= got_symbols
.end();
8482 if (!sym
->has_dynsym_index())
8485 sym
->set_dynsym_index(index
);
8487 syms
->push_back(sym
);
8488 dynpool
->add(sym
->name(), false, NULL
);
8490 // If the symbol is defined in a dynamic object and is
8491 // referenced in a regular object, then mark the dynamic
8492 // object as needed. This is used to implement --as-needed.
8493 if (sym
->is_from_dynobj() && sym
->in_reg())
8494 sym
->object()->set_is_needed();
8498 // Set index of the first symbol that has .got entry.
8499 this->got_
->set_first_global_got_dynsym_index(
8500 got_sym_count
> 0 ? index
- got_sym_count
: -1U);
8502 if (this->mips_stubs_
!= NULL
)
8503 this->mips_stubs_
->set_dynsym_count(index
);
8508 // Create a PLT entry for a global symbol referenced by r_type relocation.
8510 template<int size
, bool big_endian
>
8512 Target_mips
<size
, big_endian
>::make_plt_entry(Symbol_table
* symtab
,
8514 Mips_symbol
<size
>* gsym
,
8515 unsigned int r_type
)
8517 if (gsym
->has_lazy_stub() || gsym
->has_plt_offset())
8520 if (this->plt_
== NULL
)
8522 // Create the GOT section first.
8523 this->got_section(symtab
, layout
);
8525 this->got_plt_
= new Output_data_space(4, "** GOT PLT");
8526 layout
->add_output_section_data(".got.plt", elfcpp::SHT_PROGBITS
,
8527 (elfcpp::SHF_ALLOC
| elfcpp::SHF_WRITE
),
8528 this->got_plt_
, ORDER_DATA
, false);
8530 // The first two entries are reserved.
8531 this->got_plt_
->set_current_data_size(2 * size
/8);
8533 this->plt_
= new Mips_output_data_plt
<size
, big_endian
>(layout
,
8536 layout
->add_output_section_data(".plt", elfcpp::SHT_PROGBITS
,
8538 | elfcpp::SHF_EXECINSTR
),
8539 this->plt_
, ORDER_PLT
, false);
8541 // Make the sh_info field of .rel.plt point to .plt.
8542 Output_section
* rel_plt_os
= this->plt_
->rel_plt()->output_section();
8543 rel_plt_os
->set_info_section(this->plt_
->output_section());
8546 this->plt_
->add_entry(gsym
, r_type
);
8550 // Get the .MIPS.stubs section, creating it if necessary.
8552 template<int size
, bool big_endian
>
8553 Mips_output_data_mips_stubs
<size
, big_endian
>*
8554 Target_mips
<size
, big_endian
>::mips_stubs_section(Layout
* layout
)
8556 if (this->mips_stubs_
== NULL
)
8559 new Mips_output_data_mips_stubs
<size
, big_endian
>(this);
8560 layout
->add_output_section_data(".MIPS.stubs", elfcpp::SHT_PROGBITS
,
8562 | elfcpp::SHF_EXECINSTR
),
8563 this->mips_stubs_
, ORDER_PLT
, false);
8565 return this->mips_stubs_
;
8568 // Get the LA25 stub section, creating it if necessary.
8570 template<int size
, bool big_endian
>
8571 Mips_output_data_la25_stub
<size
, big_endian
>*
8572 Target_mips
<size
, big_endian
>::la25_stub_section(Layout
* layout
)
8574 if (this->la25_stub_
== NULL
)
8576 this->la25_stub_
= new Mips_output_data_la25_stub
<size
, big_endian
>();
8577 layout
->add_output_section_data(".text", elfcpp::SHT_PROGBITS
,
8579 | elfcpp::SHF_EXECINSTR
),
8580 this->la25_stub_
, ORDER_TEXT
, false);
8582 return this->la25_stub_
;
8585 // Process the relocations to determine unreferenced sections for
8586 // garbage collection.
8588 template<int size
, bool big_endian
>
8590 Target_mips
<size
, big_endian
>::gc_process_relocs(
8591 Symbol_table
* symtab
,
8593 Sized_relobj_file
<size
, big_endian
>* object
,
8594 unsigned int data_shndx
,
8595 unsigned int sh_type
,
8596 const unsigned char* prelocs
,
8598 Output_section
* output_section
,
8599 bool needs_special_offset_handling
,
8600 size_t local_symbol_count
,
8601 const unsigned char* plocal_symbols
)
8603 typedef Target_mips
<size
, big_endian
> Mips
;
8605 if (sh_type
== elfcpp::SHT_REL
)
8607 typedef Mips_classify_reloc
<elfcpp::SHT_REL
, size
, big_endian
>
8610 gold::gc_process_relocs
<size
, big_endian
, Mips
, Scan
, Classify_reloc
>(
8619 needs_special_offset_handling
,
8623 else if (sh_type
== elfcpp::SHT_RELA
)
8625 typedef Mips_classify_reloc
<elfcpp::SHT_RELA
, size
, big_endian
>
8628 gold::gc_process_relocs
<size
, big_endian
, Mips
, Scan
, Classify_reloc
>(
8637 needs_special_offset_handling
,
8645 // Scan relocations for a section.
8647 template<int size
, bool big_endian
>
8649 Target_mips
<size
, big_endian
>::scan_relocs(
8650 Symbol_table
* symtab
,
8652 Sized_relobj_file
<size
, big_endian
>* object
,
8653 unsigned int data_shndx
,
8654 unsigned int sh_type
,
8655 const unsigned char* prelocs
,
8657 Output_section
* output_section
,
8658 bool needs_special_offset_handling
,
8659 size_t local_symbol_count
,
8660 const unsigned char* plocal_symbols
)
8662 typedef Target_mips
<size
, big_endian
> Mips
;
8664 if (sh_type
== elfcpp::SHT_REL
)
8666 typedef Mips_classify_reloc
<elfcpp::SHT_REL
, size
, big_endian
>
8669 gold::scan_relocs
<size
, big_endian
, Mips
, Scan
, Classify_reloc
>(
8678 needs_special_offset_handling
,
8682 else if (sh_type
== elfcpp::SHT_RELA
)
8684 typedef Mips_classify_reloc
<elfcpp::SHT_RELA
, size
, big_endian
>
8687 gold::scan_relocs
<size
, big_endian
, Mips
, Scan
, Classify_reloc
>(
8696 needs_special_offset_handling
,
8702 template<int size
, bool big_endian
>
8704 Target_mips
<size
, big_endian
>::mips_32bit_flags(elfcpp::Elf_Word flags
)
8706 return ((flags
& elfcpp::EF_MIPS_32BITMODE
) != 0
8707 || (flags
& elfcpp::EF_MIPS_ABI
) == elfcpp::E_MIPS_ABI_O32
8708 || (flags
& elfcpp::EF_MIPS_ABI
) == elfcpp::E_MIPS_ABI_EABI32
8709 || (flags
& elfcpp::EF_MIPS_ARCH
) == elfcpp::E_MIPS_ARCH_1
8710 || (flags
& elfcpp::EF_MIPS_ARCH
) == elfcpp::E_MIPS_ARCH_2
8711 || (flags
& elfcpp::EF_MIPS_ARCH
) == elfcpp::E_MIPS_ARCH_32
8712 || (flags
& elfcpp::EF_MIPS_ARCH
) == elfcpp::E_MIPS_ARCH_32R2
8713 || (flags
& elfcpp::EF_MIPS_ARCH
) == elfcpp::E_MIPS_ARCH_32R6
);
8716 // Return the MACH for a MIPS e_flags value.
8717 template<int size
, bool big_endian
>
8719 Target_mips
<size
, big_endian
>::elf_mips_mach(elfcpp::Elf_Word flags
)
8721 switch (flags
& elfcpp::EF_MIPS_MACH
)
8723 case elfcpp::E_MIPS_MACH_3900
:
8724 return mach_mips3900
;
8726 case elfcpp::E_MIPS_MACH_4010
:
8727 return mach_mips4010
;
8729 case elfcpp::E_MIPS_MACH_4100
:
8730 return mach_mips4100
;
8732 case elfcpp::E_MIPS_MACH_4111
:
8733 return mach_mips4111
;
8735 case elfcpp::E_MIPS_MACH_4120
:
8736 return mach_mips4120
;
8738 case elfcpp::E_MIPS_MACH_4650
:
8739 return mach_mips4650
;
8741 case elfcpp::E_MIPS_MACH_5400
:
8742 return mach_mips5400
;
8744 case elfcpp::E_MIPS_MACH_5500
:
8745 return mach_mips5500
;
8747 case elfcpp::E_MIPS_MACH_5900
:
8748 return mach_mips5900
;
8750 case elfcpp::E_MIPS_MACH_9000
:
8751 return mach_mips9000
;
8753 case elfcpp::E_MIPS_MACH_SB1
:
8754 return mach_mips_sb1
;
8756 case elfcpp::E_MIPS_MACH_LS2E
:
8757 return mach_mips_loongson_2e
;
8759 case elfcpp::E_MIPS_MACH_LS2F
:
8760 return mach_mips_loongson_2f
;
8762 case elfcpp::E_MIPS_MACH_LS3A
:
8763 return mach_mips_loongson_3a
;
8765 case elfcpp::E_MIPS_MACH_OCTEON3
:
8766 return mach_mips_octeon3
;
8768 case elfcpp::E_MIPS_MACH_OCTEON2
:
8769 return mach_mips_octeon2
;
8771 case elfcpp::E_MIPS_MACH_OCTEON
:
8772 return mach_mips_octeon
;
8774 case elfcpp::E_MIPS_MACH_XLR
:
8775 return mach_mips_xlr
;
8778 switch (flags
& elfcpp::EF_MIPS_ARCH
)
8781 case elfcpp::E_MIPS_ARCH_1
:
8782 return mach_mips3000
;
8784 case elfcpp::E_MIPS_ARCH_2
:
8785 return mach_mips6000
;
8787 case elfcpp::E_MIPS_ARCH_3
:
8788 return mach_mips4000
;
8790 case elfcpp::E_MIPS_ARCH_4
:
8791 return mach_mips8000
;
8793 case elfcpp::E_MIPS_ARCH_5
:
8796 case elfcpp::E_MIPS_ARCH_32
:
8797 return mach_mipsisa32
;
8799 case elfcpp::E_MIPS_ARCH_64
:
8800 return mach_mipsisa64
;
8802 case elfcpp::E_MIPS_ARCH_32R2
:
8803 return mach_mipsisa32r2
;
8805 case elfcpp::E_MIPS_ARCH_32R6
:
8806 return mach_mipsisa32r6
;
8808 case elfcpp::E_MIPS_ARCH_64R2
:
8809 return mach_mipsisa64r2
;
8811 case elfcpp::E_MIPS_ARCH_64R6
:
8812 return mach_mipsisa64r6
;
8819 // Return the MACH for each .MIPS.abiflags ISA Extension.
8821 template<int size
, bool big_endian
>
8823 Target_mips
<size
, big_endian
>::mips_isa_ext_mach(unsigned int isa_ext
)
8827 case elfcpp::AFL_EXT_3900
:
8828 return mach_mips3900
;
8830 case elfcpp::AFL_EXT_4010
:
8831 return mach_mips4010
;
8833 case elfcpp::AFL_EXT_4100
:
8834 return mach_mips4100
;
8836 case elfcpp::AFL_EXT_4111
:
8837 return mach_mips4111
;
8839 case elfcpp::AFL_EXT_4120
:
8840 return mach_mips4120
;
8842 case elfcpp::AFL_EXT_4650
:
8843 return mach_mips4650
;
8845 case elfcpp::AFL_EXT_5400
:
8846 return mach_mips5400
;
8848 case elfcpp::AFL_EXT_5500
:
8849 return mach_mips5500
;
8851 case elfcpp::AFL_EXT_5900
:
8852 return mach_mips5900
;
8854 case elfcpp::AFL_EXT_10000
:
8855 return mach_mips10000
;
8857 case elfcpp::AFL_EXT_LOONGSON_2E
:
8858 return mach_mips_loongson_2e
;
8860 case elfcpp::AFL_EXT_LOONGSON_2F
:
8861 return mach_mips_loongson_2f
;
8863 case elfcpp::AFL_EXT_LOONGSON_3A
:
8864 return mach_mips_loongson_3a
;
8866 case elfcpp::AFL_EXT_SB1
:
8867 return mach_mips_sb1
;
8869 case elfcpp::AFL_EXT_OCTEON
:
8870 return mach_mips_octeon
;
8872 case elfcpp::AFL_EXT_OCTEONP
:
8873 return mach_mips_octeonp
;
8875 case elfcpp::AFL_EXT_OCTEON2
:
8876 return mach_mips_octeon2
;
8878 case elfcpp::AFL_EXT_XLR
:
8879 return mach_mips_xlr
;
8882 return mach_mips3000
;
8886 // Return the .MIPS.abiflags value representing each ISA Extension.
8888 template<int size
, bool big_endian
>
8890 Target_mips
<size
, big_endian
>::mips_isa_ext(unsigned int mips_mach
)
8895 return elfcpp::AFL_EXT_3900
;
8898 return elfcpp::AFL_EXT_4010
;
8901 return elfcpp::AFL_EXT_4100
;
8904 return elfcpp::AFL_EXT_4111
;
8907 return elfcpp::AFL_EXT_4120
;
8910 return elfcpp::AFL_EXT_4650
;
8913 return elfcpp::AFL_EXT_5400
;
8916 return elfcpp::AFL_EXT_5500
;
8919 return elfcpp::AFL_EXT_5900
;
8921 case mach_mips10000
:
8922 return elfcpp::AFL_EXT_10000
;
8924 case mach_mips_loongson_2e
:
8925 return elfcpp::AFL_EXT_LOONGSON_2E
;
8927 case mach_mips_loongson_2f
:
8928 return elfcpp::AFL_EXT_LOONGSON_2F
;
8930 case mach_mips_loongson_3a
:
8931 return elfcpp::AFL_EXT_LOONGSON_3A
;
8934 return elfcpp::AFL_EXT_SB1
;
8936 case mach_mips_octeon
:
8937 return elfcpp::AFL_EXT_OCTEON
;
8939 case mach_mips_octeonp
:
8940 return elfcpp::AFL_EXT_OCTEONP
;
8942 case mach_mips_octeon3
:
8943 return elfcpp::AFL_EXT_OCTEON3
;
8945 case mach_mips_octeon2
:
8946 return elfcpp::AFL_EXT_OCTEON2
;
8949 return elfcpp::AFL_EXT_XLR
;
8956 // Update the isa_level, isa_rev, isa_ext fields of abiflags.
8958 template<int size
, bool big_endian
>
8960 Target_mips
<size
, big_endian
>::update_abiflags_isa(const std::string
& name
,
8961 elfcpp::Elf_Word e_flags
, Mips_abiflags
<big_endian
>* abiflags
)
8964 switch (e_flags
& elfcpp::EF_MIPS_ARCH
)
8966 case elfcpp::E_MIPS_ARCH_1
:
8967 new_isa
= this->level_rev(1, 0);
8969 case elfcpp::E_MIPS_ARCH_2
:
8970 new_isa
= this->level_rev(2, 0);
8972 case elfcpp::E_MIPS_ARCH_3
:
8973 new_isa
= this->level_rev(3, 0);
8975 case elfcpp::E_MIPS_ARCH_4
:
8976 new_isa
= this->level_rev(4, 0);
8978 case elfcpp::E_MIPS_ARCH_5
:
8979 new_isa
= this->level_rev(5, 0);
8981 case elfcpp::E_MIPS_ARCH_32
:
8982 new_isa
= this->level_rev(32, 1);
8984 case elfcpp::E_MIPS_ARCH_32R2
:
8985 new_isa
= this->level_rev(32, 2);
8987 case elfcpp::E_MIPS_ARCH_32R6
:
8988 new_isa
= this->level_rev(32, 6);
8990 case elfcpp::E_MIPS_ARCH_64
:
8991 new_isa
= this->level_rev(64, 1);
8993 case elfcpp::E_MIPS_ARCH_64R2
:
8994 new_isa
= this->level_rev(64, 2);
8996 case elfcpp::E_MIPS_ARCH_64R6
:
8997 new_isa
= this->level_rev(64, 6);
9000 gold_error(_("%s: Unknown architecture %s"), name
.c_str(),
9001 this->elf_mips_mach_name(e_flags
));
9004 if (new_isa
> this->level_rev(abiflags
->isa_level
, abiflags
->isa_rev
))
9006 // Decode a single value into level and revision.
9007 abiflags
->isa_level
= new_isa
>> 3;
9008 abiflags
->isa_rev
= new_isa
& 0x7;
9011 // Update the isa_ext if needed.
9012 if (this->mips_mach_extends(this->mips_isa_ext_mach(abiflags
->isa_ext
),
9013 this->elf_mips_mach(e_flags
)))
9014 abiflags
->isa_ext
= this->mips_isa_ext(this->elf_mips_mach(e_flags
));
9017 // Infer the content of the ABI flags based on the elf header.
9019 template<int size
, bool big_endian
>
9021 Target_mips
<size
, big_endian
>::infer_abiflags(
9022 Mips_relobj
<size
, big_endian
>* relobj
, Mips_abiflags
<big_endian
>* abiflags
)
9024 const Attributes_section_data
* pasd
= relobj
->attributes_section_data();
9025 int attr_fp_abi
= elfcpp::Val_GNU_MIPS_ABI_FP_ANY
;
9026 elfcpp::Elf_Word e_flags
= relobj
->processor_specific_flags();
9028 this->update_abiflags_isa(relobj
->name(), e_flags
, abiflags
);
9031 // Read fp_abi from the .gnu.attribute section.
9032 const Object_attribute
* attr
=
9033 pasd
->known_attributes(Object_attribute::OBJ_ATTR_GNU
);
9034 attr_fp_abi
= attr
[elfcpp::Tag_GNU_MIPS_ABI_FP
].int_value();
9037 abiflags
->fp_abi
= attr_fp_abi
;
9038 abiflags
->cpr1_size
= elfcpp::AFL_REG_NONE
;
9039 abiflags
->cpr2_size
= elfcpp::AFL_REG_NONE
;
9040 abiflags
->gpr_size
= this->mips_32bit_flags(e_flags
) ? elfcpp::AFL_REG_32
9041 : elfcpp::AFL_REG_64
;
9043 if (abiflags
->fp_abi
== elfcpp::Val_GNU_MIPS_ABI_FP_SINGLE
9044 || abiflags
->fp_abi
== elfcpp::Val_GNU_MIPS_ABI_FP_XX
9045 || (abiflags
->fp_abi
== elfcpp::Val_GNU_MIPS_ABI_FP_DOUBLE
9046 && abiflags
->gpr_size
== elfcpp::AFL_REG_32
))
9047 abiflags
->cpr1_size
= elfcpp::AFL_REG_32
;
9048 else if (abiflags
->fp_abi
== elfcpp::Val_GNU_MIPS_ABI_FP_DOUBLE
9049 || abiflags
->fp_abi
== elfcpp::Val_GNU_MIPS_ABI_FP_64
9050 || abiflags
->fp_abi
== elfcpp::Val_GNU_MIPS_ABI_FP_64A
)
9051 abiflags
->cpr1_size
= elfcpp::AFL_REG_64
;
9053 if (e_flags
& elfcpp::EF_MIPS_ARCH_ASE_MDMX
)
9054 abiflags
->ases
|= elfcpp::AFL_ASE_MDMX
;
9055 if (e_flags
& elfcpp::EF_MIPS_ARCH_ASE_M16
)
9056 abiflags
->ases
|= elfcpp::AFL_ASE_MIPS16
;
9057 if (e_flags
& elfcpp::EF_MIPS_ARCH_ASE_MICROMIPS
)
9058 abiflags
->ases
|= elfcpp::AFL_ASE_MICROMIPS
;
9060 if (abiflags
->fp_abi
!= elfcpp::Val_GNU_MIPS_ABI_FP_ANY
9061 && abiflags
->fp_abi
!= elfcpp::Val_GNU_MIPS_ABI_FP_SOFT
9062 && abiflags
->fp_abi
!= elfcpp::Val_GNU_MIPS_ABI_FP_64A
9063 && abiflags
->isa_level
>= 32
9064 && abiflags
->isa_ext
!= elfcpp::AFL_EXT_LOONGSON_3A
)
9065 abiflags
->flags1
|= elfcpp::AFL_FLAGS1_ODDSPREG
;
9068 // Create abiflags from elf header or from .MIPS.abiflags section.
9070 template<int size
, bool big_endian
>
9072 Target_mips
<size
, big_endian
>::create_abiflags(
9073 Mips_relobj
<size
, big_endian
>* relobj
,
9074 Mips_abiflags
<big_endian
>* abiflags
)
9076 Mips_abiflags
<big_endian
>* sec_abiflags
= relobj
->abiflags();
9077 Mips_abiflags
<big_endian
> header_abiflags
;
9079 this->infer_abiflags(relobj
, &header_abiflags
);
9081 if (sec_abiflags
== NULL
)
9083 // If there is no input .MIPS.abiflags section, use abiflags created
9085 *abiflags
= header_abiflags
;
9089 this->has_abiflags_section_
= true;
9091 // It is not possible to infer the correct ISA revision for R3 or R5
9092 // so drop down to R2 for the checks.
9093 unsigned char isa_rev
= sec_abiflags
->isa_rev
;
9094 if (isa_rev
== 3 || isa_rev
== 5)
9097 // Check compatibility between abiflags created from elf header
9098 // and abiflags from .MIPS.abiflags section in this object file.
9099 if (this->level_rev(sec_abiflags
->isa_level
, isa_rev
)
9100 < this->level_rev(header_abiflags
.isa_level
, header_abiflags
.isa_rev
))
9101 gold_warning(_("%s: Inconsistent ISA between e_flags and .MIPS.abiflags"),
9102 relobj
->name().c_str());
9103 if (header_abiflags
.fp_abi
!= elfcpp::Val_GNU_MIPS_ABI_FP_ANY
9104 && sec_abiflags
->fp_abi
!= header_abiflags
.fp_abi
)
9105 gold_warning(_("%s: Inconsistent FP ABI between .gnu.attributes and "
9106 ".MIPS.abiflags"), relobj
->name().c_str());
9107 if ((sec_abiflags
->ases
& header_abiflags
.ases
) != header_abiflags
.ases
)
9108 gold_warning(_("%s: Inconsistent ASEs between e_flags and .MIPS.abiflags"),
9109 relobj
->name().c_str());
9110 // The isa_ext is allowed to be an extension of what can be inferred
9112 if (!this->mips_mach_extends(this->mips_isa_ext_mach(header_abiflags
.isa_ext
),
9113 this->mips_isa_ext_mach(sec_abiflags
->isa_ext
)))
9114 gold_warning(_("%s: Inconsistent ISA extensions between e_flags and "
9115 ".MIPS.abiflags"), relobj
->name().c_str());
9116 if (sec_abiflags
->flags2
!= 0)
9117 gold_warning(_("%s: Unexpected flag in the flags2 field of "
9118 ".MIPS.abiflags (0x%x)"), relobj
->name().c_str(),
9119 sec_abiflags
->flags2
);
9120 // Use abiflags from .MIPS.abiflags section.
9121 *abiflags
= *sec_abiflags
;
9124 // Return the meaning of fp_abi, or "unknown" if not known.
9126 template<int size
, bool big_endian
>
9128 Target_mips
<size
, big_endian
>::fp_abi_string(int fp
)
9132 case elfcpp::Val_GNU_MIPS_ABI_FP_DOUBLE
:
9133 return "-mdouble-float";
9134 case elfcpp::Val_GNU_MIPS_ABI_FP_SINGLE
:
9135 return "-msingle-float";
9136 case elfcpp::Val_GNU_MIPS_ABI_FP_SOFT
:
9137 return "-msoft-float";
9138 case elfcpp::Val_GNU_MIPS_ABI_FP_OLD_64
:
9139 return _("-mips32r2 -mfp64 (12 callee-saved)");
9140 case elfcpp::Val_GNU_MIPS_ABI_FP_XX
:
9142 case elfcpp::Val_GNU_MIPS_ABI_FP_64
:
9143 return "-mgp32 -mfp64";
9144 case elfcpp::Val_GNU_MIPS_ABI_FP_64A
:
9145 return "-mgp32 -mfp64 -mno-odd-spreg";
9153 template<int size
, bool big_endian
>
9155 Target_mips
<size
, big_endian
>::select_fp_abi(const std::string
& name
, int in_fp
,
9158 if (in_fp
== out_fp
)
9161 if (out_fp
== elfcpp::Val_GNU_MIPS_ABI_FP_ANY
)
9163 else if (out_fp
== elfcpp::Val_GNU_MIPS_ABI_FP_XX
9164 && (in_fp
== elfcpp::Val_GNU_MIPS_ABI_FP_DOUBLE
9165 || in_fp
== elfcpp::Val_GNU_MIPS_ABI_FP_64
9166 || in_fp
== elfcpp::Val_GNU_MIPS_ABI_FP_64A
))
9168 else if (in_fp
== elfcpp::Val_GNU_MIPS_ABI_FP_XX
9169 && (out_fp
== elfcpp::Val_GNU_MIPS_ABI_FP_DOUBLE
9170 || out_fp
== elfcpp::Val_GNU_MIPS_ABI_FP_64
9171 || out_fp
== elfcpp::Val_GNU_MIPS_ABI_FP_64A
))
9172 return out_fp
; // Keep the current setting.
9173 else if (out_fp
== elfcpp::Val_GNU_MIPS_ABI_FP_64A
9174 && in_fp
== elfcpp::Val_GNU_MIPS_ABI_FP_64
)
9176 else if (in_fp
== elfcpp::Val_GNU_MIPS_ABI_FP_64A
9177 && out_fp
== elfcpp::Val_GNU_MIPS_ABI_FP_64
)
9178 return out_fp
; // Keep the current setting.
9179 else if (in_fp
!= elfcpp::Val_GNU_MIPS_ABI_FP_ANY
)
9180 gold_warning(_("%s: FP ABI %s is incompatible with %s"), name
.c_str(),
9181 fp_abi_string(in_fp
), fp_abi_string(out_fp
));
9185 // Merge attributes from input object.
9187 template<int size
, bool big_endian
>
9189 Target_mips
<size
, big_endian
>::merge_obj_attributes(const std::string
& name
,
9190 const Attributes_section_data
* pasd
)
9192 // Return if there is no attributes section data.
9196 // If output has no object attributes, just copy.
9197 if (this->attributes_section_data_
== NULL
)
9199 this->attributes_section_data_
= new Attributes_section_data(*pasd
);
9203 Object_attribute
* out_attr
= this->attributes_section_data_
->known_attributes(
9204 Object_attribute::OBJ_ATTR_GNU
);
9206 out_attr
[elfcpp::Tag_GNU_MIPS_ABI_FP
].set_type(1);
9207 out_attr
[elfcpp::Tag_GNU_MIPS_ABI_FP
].set_int_value(this->abiflags_
->fp_abi
);
9209 // Merge Tag_compatibility attributes and any common GNU ones.
9210 this->attributes_section_data_
->merge(name
.c_str(), pasd
);
9213 // Merge abiflags from input object.
9215 template<int size
, bool big_endian
>
9217 Target_mips
<size
, big_endian
>::merge_obj_abiflags(const std::string
& name
,
9218 Mips_abiflags
<big_endian
>* in_abiflags
)
9220 // If output has no abiflags, just copy.
9221 if (this->abiflags_
== NULL
)
9223 this->abiflags_
= new Mips_abiflags
<big_endian
>(*in_abiflags
);
9227 this->abiflags_
->fp_abi
= this->select_fp_abi(name
, in_abiflags
->fp_abi
,
9228 this->abiflags_
->fp_abi
);
9231 this->abiflags_
->isa_level
= std::max(this->abiflags_
->isa_level
,
9232 in_abiflags
->isa_level
);
9233 this->abiflags_
->isa_rev
= std::max(this->abiflags_
->isa_rev
,
9234 in_abiflags
->isa_rev
);
9235 this->abiflags_
->gpr_size
= std::max(this->abiflags_
->gpr_size
,
9236 in_abiflags
->gpr_size
);
9237 this->abiflags_
->cpr1_size
= std::max(this->abiflags_
->cpr1_size
,
9238 in_abiflags
->cpr1_size
);
9239 this->abiflags_
->cpr2_size
= std::max(this->abiflags_
->cpr2_size
,
9240 in_abiflags
->cpr2_size
);
9241 this->abiflags_
->ases
|= in_abiflags
->ases
;
9242 this->abiflags_
->flags1
|= in_abiflags
->flags1
;
9245 // Check whether machine EXTENSION is an extension of machine BASE.
9246 template<int size
, bool big_endian
>
9248 Target_mips
<size
, big_endian
>::mips_mach_extends(unsigned int base
,
9249 unsigned int extension
)
9251 if (extension
== base
)
9254 if ((base
== mach_mipsisa32
)
9255 && this->mips_mach_extends(mach_mipsisa64
, extension
))
9258 if ((base
== mach_mipsisa32r2
)
9259 && this->mips_mach_extends(mach_mipsisa64r2
, extension
))
9262 for (unsigned int i
= 0; i
< this->mips_mach_extensions_
.size(); ++i
)
9263 if (extension
== this->mips_mach_extensions_
[i
].first
)
9265 extension
= this->mips_mach_extensions_
[i
].second
;
9266 if (extension
== base
)
9273 // Merge file header flags from input object.
9275 template<int size
, bool big_endian
>
9277 Target_mips
<size
, big_endian
>::merge_obj_e_flags(const std::string
& name
,
9278 elfcpp::Elf_Word in_flags
)
9280 // If flags are not set yet, just copy them.
9281 if (!this->are_processor_specific_flags_set())
9283 this->set_processor_specific_flags(in_flags
);
9284 this->mach_
= this->elf_mips_mach(in_flags
);
9288 elfcpp::Elf_Word new_flags
= in_flags
;
9289 elfcpp::Elf_Word old_flags
= this->processor_specific_flags();
9290 elfcpp::Elf_Word merged_flags
= this->processor_specific_flags();
9291 merged_flags
|= new_flags
& elfcpp::EF_MIPS_NOREORDER
;
9293 // Check flag compatibility.
9294 new_flags
&= ~elfcpp::EF_MIPS_NOREORDER
;
9295 old_flags
&= ~elfcpp::EF_MIPS_NOREORDER
;
9297 // Some IRIX 6 BSD-compatibility objects have this bit set. It
9298 // doesn't seem to matter.
9299 new_flags
&= ~elfcpp::EF_MIPS_XGOT
;
9300 old_flags
&= ~elfcpp::EF_MIPS_XGOT
;
9302 // MIPSpro generates ucode info in n64 objects. Again, we should
9303 // just be able to ignore this.
9304 new_flags
&= ~elfcpp::EF_MIPS_UCODE
;
9305 old_flags
&= ~elfcpp::EF_MIPS_UCODE
;
9307 if (new_flags
== old_flags
)
9309 this->set_processor_specific_flags(merged_flags
);
9313 if (((new_flags
& (elfcpp::EF_MIPS_PIC
| elfcpp::EF_MIPS_CPIC
)) != 0)
9314 != ((old_flags
& (elfcpp::EF_MIPS_PIC
| elfcpp::EF_MIPS_CPIC
)) != 0))
9315 gold_warning(_("%s: linking abicalls files with non-abicalls files"),
9318 if (new_flags
& (elfcpp::EF_MIPS_PIC
| elfcpp::EF_MIPS_CPIC
))
9319 merged_flags
|= elfcpp::EF_MIPS_CPIC
;
9320 if (!(new_flags
& elfcpp::EF_MIPS_PIC
))
9321 merged_flags
&= ~elfcpp::EF_MIPS_PIC
;
9323 new_flags
&= ~(elfcpp::EF_MIPS_PIC
| elfcpp::EF_MIPS_CPIC
);
9324 old_flags
&= ~(elfcpp::EF_MIPS_PIC
| elfcpp::EF_MIPS_CPIC
);
9326 // Compare the ISAs.
9327 if (mips_32bit_flags(old_flags
) != mips_32bit_flags(new_flags
))
9328 gold_error(_("%s: linking 32-bit code with 64-bit code"), name
.c_str());
9329 else if (!this->mips_mach_extends(this->elf_mips_mach(in_flags
), this->mach_
))
9331 // Output ISA isn't the same as, or an extension of, input ISA.
9332 if (this->mips_mach_extends(this->mach_
, this->elf_mips_mach(in_flags
)))
9334 // Copy the architecture info from input object to output. Also copy
9335 // the 32-bit flag (if set) so that we continue to recognise
9336 // output as a 32-bit binary.
9337 this->mach_
= this->elf_mips_mach(in_flags
);
9338 merged_flags
&= ~(elfcpp::EF_MIPS_ARCH
| elfcpp::EF_MIPS_MACH
);
9339 merged_flags
|= (new_flags
& (elfcpp::EF_MIPS_ARCH
9340 | elfcpp::EF_MIPS_MACH
| elfcpp::EF_MIPS_32BITMODE
));
9342 // Update the ABI flags isa_level, isa_rev, isa_ext fields.
9343 this->update_abiflags_isa(name
, merged_flags
, this->abiflags_
);
9345 // Copy across the ABI flags if output doesn't use them
9346 // and if that was what caused us to treat input object as 32-bit.
9347 if ((old_flags
& elfcpp::EF_MIPS_ABI
) == 0
9348 && this->mips_32bit_flags(new_flags
)
9349 && !this->mips_32bit_flags(new_flags
& ~elfcpp::EF_MIPS_ABI
))
9350 merged_flags
|= new_flags
& elfcpp::EF_MIPS_ABI
;
9353 // The ISAs aren't compatible.
9354 gold_error(_("%s: linking %s module with previous %s modules"),
9355 name
.c_str(), this->elf_mips_mach_name(in_flags
),
9356 this->elf_mips_mach_name(merged_flags
));
9359 new_flags
&= (~(elfcpp::EF_MIPS_ARCH
| elfcpp::EF_MIPS_MACH
9360 | elfcpp::EF_MIPS_32BITMODE
));
9361 old_flags
&= (~(elfcpp::EF_MIPS_ARCH
| elfcpp::EF_MIPS_MACH
9362 | elfcpp::EF_MIPS_32BITMODE
));
9365 if ((new_flags
& elfcpp::EF_MIPS_ABI
) != (old_flags
& elfcpp::EF_MIPS_ABI
))
9367 // Only error if both are set (to different values).
9368 if ((new_flags
& elfcpp::EF_MIPS_ABI
)
9369 && (old_flags
& elfcpp::EF_MIPS_ABI
))
9370 gold_error(_("%s: ABI mismatch: linking %s module with "
9371 "previous %s modules"), name
.c_str(),
9372 this->elf_mips_abi_name(in_flags
),
9373 this->elf_mips_abi_name(merged_flags
));
9375 new_flags
&= ~elfcpp::EF_MIPS_ABI
;
9376 old_flags
&= ~elfcpp::EF_MIPS_ABI
;
9379 // Compare ASEs. Forbid linking MIPS16 and microMIPS ASE modules together
9380 // and allow arbitrary mixing of the remaining ASEs (retain the union).
9381 if ((new_flags
& elfcpp::EF_MIPS_ARCH_ASE
)
9382 != (old_flags
& elfcpp::EF_MIPS_ARCH_ASE
))
9384 int old_micro
= old_flags
& elfcpp::EF_MIPS_ARCH_ASE_MICROMIPS
;
9385 int new_micro
= new_flags
& elfcpp::EF_MIPS_ARCH_ASE_MICROMIPS
;
9386 int old_m16
= old_flags
& elfcpp::EF_MIPS_ARCH_ASE_M16
;
9387 int new_m16
= new_flags
& elfcpp::EF_MIPS_ARCH_ASE_M16
;
9388 int micro_mis
= old_m16
&& new_micro
;
9389 int m16_mis
= old_micro
&& new_m16
;
9391 if (m16_mis
|| micro_mis
)
9392 gold_error(_("%s: ASE mismatch: linking %s module with "
9393 "previous %s modules"), name
.c_str(),
9394 m16_mis
? "MIPS16" : "microMIPS",
9395 m16_mis
? "microMIPS" : "MIPS16");
9397 merged_flags
|= new_flags
& elfcpp::EF_MIPS_ARCH_ASE
;
9399 new_flags
&= ~ elfcpp::EF_MIPS_ARCH_ASE
;
9400 old_flags
&= ~ elfcpp::EF_MIPS_ARCH_ASE
;
9403 // Compare NaN encodings.
9404 if ((new_flags
& elfcpp::EF_MIPS_NAN2008
) != (old_flags
& elfcpp::EF_MIPS_NAN2008
))
9406 gold_error(_("%s: linking %s module with previous %s modules"),
9408 (new_flags
& elfcpp::EF_MIPS_NAN2008
9409 ? "-mnan=2008" : "-mnan=legacy"),
9410 (old_flags
& elfcpp::EF_MIPS_NAN2008
9411 ? "-mnan=2008" : "-mnan=legacy"));
9413 new_flags
&= ~elfcpp::EF_MIPS_NAN2008
;
9414 old_flags
&= ~elfcpp::EF_MIPS_NAN2008
;
9417 // Compare FP64 state.
9418 if ((new_flags
& elfcpp::EF_MIPS_FP64
) != (old_flags
& elfcpp::EF_MIPS_FP64
))
9420 gold_error(_("%s: linking %s module with previous %s modules"),
9422 (new_flags
& elfcpp::EF_MIPS_FP64
9423 ? "-mfp64" : "-mfp32"),
9424 (old_flags
& elfcpp::EF_MIPS_FP64
9425 ? "-mfp64" : "-mfp32"));
9427 new_flags
&= ~elfcpp::EF_MIPS_FP64
;
9428 old_flags
&= ~elfcpp::EF_MIPS_FP64
;
9431 // Warn about any other mismatches.
9432 if (new_flags
!= old_flags
)
9433 gold_error(_("%s: uses different e_flags (0x%x) fields than previous "
9434 "modules (0x%x)"), name
.c_str(), new_flags
, old_flags
);
9436 this->set_processor_specific_flags(merged_flags
);
9439 // Adjust ELF file header.
9441 template<int size
, bool big_endian
>
9443 Target_mips
<size
, big_endian
>::do_adjust_elf_header(
9444 unsigned char* view
,
9447 gold_assert(len
== elfcpp::Elf_sizes
<size
>::ehdr_size
);
9449 elfcpp::Ehdr
<size
, big_endian
> ehdr(view
);
9450 unsigned char e_ident
[elfcpp::EI_NIDENT
];
9451 elfcpp::Elf_Word flags
= this->processor_specific_flags();
9452 memcpy(e_ident
, ehdr
.get_e_ident(), elfcpp::EI_NIDENT
);
9454 unsigned char ei_abiversion
= 0;
9455 elfcpp::Elf_Half type
= ehdr
.get_e_type();
9456 if (type
== elfcpp::ET_EXEC
9457 && parameters
->options().copyreloc()
9458 && (flags
& (elfcpp::EF_MIPS_PIC
| elfcpp::EF_MIPS_CPIC
))
9459 == elfcpp::EF_MIPS_CPIC
)
9462 if (this->abiflags_
!= NULL
9463 && (this->abiflags_
->fp_abi
== elfcpp::Val_GNU_MIPS_ABI_FP_64
9464 || this->abiflags_
->fp_abi
== elfcpp::Val_GNU_MIPS_ABI_FP_64A
))
9467 e_ident
[elfcpp::EI_ABIVERSION
] = ei_abiversion
;
9468 elfcpp::Ehdr_write
<size
, big_endian
> oehdr(view
);
9469 oehdr
.put_e_ident(e_ident
);
9471 if (this->entry_symbol_is_compressed_
)
9472 oehdr
.put_e_entry(ehdr
.get_e_entry() + 1);
9475 // do_make_elf_object to override the same function in the base class.
9476 // We need to use a target-specific sub-class of
9477 // Sized_relobj_file<size, big_endian> to store Mips specific information.
9478 // Hence we need to have our own ELF object creation.
9480 template<int size
, bool big_endian
>
9482 Target_mips
<size
, big_endian
>::do_make_elf_object(
9483 const std::string
& name
,
9484 Input_file
* input_file
,
9485 off_t offset
, const elfcpp::Ehdr
<size
, big_endian
>& ehdr
)
9487 int et
= ehdr
.get_e_type();
9488 // ET_EXEC files are valid input for --just-symbols/-R,
9489 // and we treat them as relocatable objects.
9490 if (et
== elfcpp::ET_REL
9491 || (et
== elfcpp::ET_EXEC
&& input_file
->just_symbols()))
9493 Mips_relobj
<size
, big_endian
>* obj
=
9494 new Mips_relobj
<size
, big_endian
>(name
, input_file
, offset
, ehdr
);
9498 else if (et
== elfcpp::ET_DYN
)
9500 // TODO(sasa): Should we create Mips_dynobj?
9501 return Target::do_make_elf_object(name
, input_file
, offset
, ehdr
);
9505 gold_error(_("%s: unsupported ELF file type %d"),
9511 // Finalize the sections.
9513 template <int size
, bool big_endian
>
9515 Target_mips
<size
, big_endian
>::do_finalize_sections(Layout
* layout
,
9516 const Input_objects
* input_objects
,
9517 Symbol_table
* symtab
)
9519 // Add +1 to MIPS16 and microMIPS init_ and _fini symbols so that DT_INIT and
9520 // DT_FINI have correct values.
9521 Mips_symbol
<size
>* init
= static_cast<Mips_symbol
<size
>*>(
9522 symtab
->lookup(parameters
->options().init()));
9523 if (init
!= NULL
&& (init
->is_mips16() || init
->is_micromips()))
9524 init
->set_value(init
->value() | 1);
9525 Mips_symbol
<size
>* fini
= static_cast<Mips_symbol
<size
>*>(
9526 symtab
->lookup(parameters
->options().fini()));
9527 if (fini
!= NULL
&& (fini
->is_mips16() || fini
->is_micromips()))
9528 fini
->set_value(fini
->value() | 1);
9530 // Check whether the entry symbol is mips16 or micromips. This is needed to
9531 // adjust entry address in ELF header.
9532 Mips_symbol
<size
>* entry
=
9533 static_cast<Mips_symbol
<size
>*>(symtab
->lookup(this->entry_symbol_name()));
9534 this->entry_symbol_is_compressed_
= (entry
!= NULL
&& (entry
->is_mips16()
9535 || entry
->is_micromips()));
9537 if (!parameters
->doing_static_link()
9538 && (strcmp(parameters
->options().hash_style(), "gnu") == 0
9539 || strcmp(parameters
->options().hash_style(), "both") == 0))
9541 // .gnu.hash and the MIPS ABI require .dynsym to be sorted in different
9542 // ways. .gnu.hash needs symbols to be grouped by hash code whereas the
9543 // MIPS ABI requires a mapping between the GOT and the symbol table.
9544 gold_error(".gnu.hash is incompatible with the MIPS ABI");
9547 // Check whether the final section that was scanned has HI16 or GOT16
9548 // relocations without the corresponding LO16 part.
9549 if (this->got16_addends_
.size() > 0)
9550 gold_error("Can't find matching LO16 reloc");
9552 // Check for any mips16 stub sections that we can discard.
9553 if (!parameters
->options().relocatable())
9555 for (Input_objects::Relobj_iterator p
= input_objects
->relobj_begin();
9556 p
!= input_objects
->relobj_end();
9559 Mips_relobj
<size
, big_endian
>* object
=
9560 Mips_relobj
<size
, big_endian
>::as_mips_relobj(*p
);
9561 object
->discard_mips16_stub_sections(symtab
);
9565 Valtype gprmask
= 0;
9566 Valtype cprmask1
= 0;
9567 Valtype cprmask2
= 0;
9568 Valtype cprmask3
= 0;
9569 Valtype cprmask4
= 0;
9570 bool has_reginfo_section
= false;
9572 for (Input_objects::Relobj_iterator p
= input_objects
->relobj_begin();
9573 p
!= input_objects
->relobj_end();
9576 Mips_relobj
<size
, big_endian
>* relobj
=
9577 Mips_relobj
<size
, big_endian
>::as_mips_relobj(*p
);
9579 // Merge .reginfo contents of input objects.
9580 if (relobj
->has_reginfo_section())
9582 has_reginfo_section
= true;
9583 gprmask
|= relobj
->gprmask();
9584 cprmask1
|= relobj
->cprmask1();
9585 cprmask2
|= relobj
->cprmask2();
9586 cprmask3
|= relobj
->cprmask3();
9587 cprmask4
|= relobj
->cprmask4();
9590 Input_file::Format format
= relobj
->input_file()->format();
9591 if (format
!= Input_file::FORMAT_ELF
)
9594 // If all input sections will be discarded, don't use this object
9595 // file for merging processor specific flags.
9596 bool should_merge_processor_specific_flags
= false;
9598 for (unsigned int i
= 1; i
< relobj
->shnum(); ++i
)
9599 if (relobj
->output_section(i
) != NULL
)
9601 should_merge_processor_specific_flags
= true;
9605 if (!should_merge_processor_specific_flags
)
9608 // Merge processor specific flags.
9609 Mips_abiflags
<big_endian
> in_abiflags
;
9611 this->create_abiflags(relobj
, &in_abiflags
);
9612 this->merge_obj_e_flags(relobj
->name(),
9613 relobj
->processor_specific_flags());
9614 this->merge_obj_abiflags(relobj
->name(), &in_abiflags
);
9615 this->merge_obj_attributes(relobj
->name(),
9616 relobj
->attributes_section_data());
9619 // Create a .gnu.attributes section if we have merged any attributes
9621 if (this->attributes_section_data_
!= NULL
)
9623 Output_attributes_section_data
* attributes_section
=
9624 new Output_attributes_section_data(*this->attributes_section_data_
);
9625 layout
->add_output_section_data(".gnu.attributes",
9626 elfcpp::SHT_GNU_ATTRIBUTES
, 0,
9627 attributes_section
, ORDER_INVALID
, false);
9630 // Create .MIPS.abiflags output section if there is an input section.
9631 if (this->has_abiflags_section_
)
9633 Mips_output_section_abiflags
<size
, big_endian
>* abiflags_section
=
9634 new Mips_output_section_abiflags
<size
, big_endian
>(*this->abiflags_
);
9636 Output_section
* os
=
9637 layout
->add_output_section_data(".MIPS.abiflags",
9638 elfcpp::SHT_MIPS_ABIFLAGS
,
9640 abiflags_section
, ORDER_INVALID
, false);
9642 if (!parameters
->options().relocatable() && os
!= NULL
)
9644 Output_segment
* abiflags_segment
=
9645 layout
->make_output_segment(elfcpp::PT_MIPS_ABIFLAGS
, elfcpp::PF_R
);
9646 abiflags_segment
->add_output_section_to_nonload(os
, elfcpp::PF_R
);
9650 if (has_reginfo_section
&& !parameters
->options().gc_sections())
9652 // Create .reginfo output section.
9653 Mips_output_section_reginfo
<size
, big_endian
>* reginfo_section
=
9654 new Mips_output_section_reginfo
<size
, big_endian
>(this, gprmask
,
9656 cprmask3
, cprmask4
);
9658 Output_section
* os
=
9659 layout
->add_output_section_data(".reginfo", elfcpp::SHT_MIPS_REGINFO
,
9660 elfcpp::SHF_ALLOC
, reginfo_section
,
9661 ORDER_INVALID
, false);
9663 if (!parameters
->options().relocatable() && os
!= NULL
)
9665 Output_segment
* reginfo_segment
=
9666 layout
->make_output_segment(elfcpp::PT_MIPS_REGINFO
,
9668 reginfo_segment
->add_output_section_to_nonload(os
, elfcpp::PF_R
);
9672 if (this->plt_
!= NULL
)
9674 // Set final PLT offsets for symbols.
9675 this->plt_section()->set_plt_offsets();
9677 // Define _PROCEDURE_LINKAGE_TABLE_ at the start of the .plt section.
9678 // Set STO_MICROMIPS flag if the output has microMIPS code, but only if
9679 // there are no standard PLT entries present.
9680 unsigned char nonvis
= 0;
9681 if (this->is_output_micromips()
9682 && !this->plt_section()->has_standard_entries())
9683 nonvis
= elfcpp::STO_MICROMIPS
>> 2;
9684 symtab
->define_in_output_data("_PROCEDURE_LINKAGE_TABLE_", NULL
,
9685 Symbol_table::PREDEFINED
,
9687 0, 0, elfcpp::STT_FUNC
,
9689 elfcpp::STV_DEFAULT
, nonvis
,
9693 if (this->mips_stubs_
!= NULL
)
9695 // Define _MIPS_STUBS_ at the start of the .MIPS.stubs section.
9696 unsigned char nonvis
= 0;
9697 if (this->is_output_micromips())
9698 nonvis
= elfcpp::STO_MICROMIPS
>> 2;
9699 symtab
->define_in_output_data("_MIPS_STUBS_", NULL
,
9700 Symbol_table::PREDEFINED
,
9702 0, 0, elfcpp::STT_FUNC
,
9704 elfcpp::STV_DEFAULT
, nonvis
,
9708 if (!parameters
->options().relocatable() && !parameters
->doing_static_link())
9709 // In case there is no .got section, create one.
9710 this->got_section(symtab
, layout
);
9712 // Emit any relocs we saved in an attempt to avoid generating COPY
9714 if (this->copy_relocs_
.any_saved_relocs())
9715 this->copy_relocs_
.emit_mips(this->rel_dyn_section(layout
), symtab
, layout
,
9719 this->set_gp(layout
, symtab
);
9721 // Emit dynamic relocs.
9722 for (typename
std::vector
<Dyn_reloc
>::iterator p
= this->dyn_relocs_
.begin();
9723 p
!= this->dyn_relocs_
.end();
9725 p
->emit(this->rel_dyn_section(layout
), this->got_section(), symtab
);
9727 if (this->has_got_section())
9728 this->got_section()->lay_out_got(layout
, symtab
, input_objects
);
9730 if (this->mips_stubs_
!= NULL
)
9731 this->mips_stubs_
->set_needs_dynsym_value();
9733 // Check for functions that might need $25 to be valid on entry.
9734 // TODO(sasa): Can we do this without iterating over all symbols?
9735 typedef Symbol_visitor_check_symbols
<size
, big_endian
> Symbol_visitor
;
9736 symtab
->for_all_symbols
<size
, Symbol_visitor
>(Symbol_visitor(this, layout
,
9739 // Add NULL segment.
9740 if (!parameters
->options().relocatable())
9741 layout
->make_output_segment(elfcpp::PT_NULL
, 0);
9743 // Fill in some more dynamic tags.
9744 // TODO(sasa): Add more dynamic tags.
9745 const Reloc_section
* rel_plt
= (this->plt_
== NULL
9746 ? NULL
: this->plt_
->rel_plt());
9747 layout
->add_target_dynamic_tags(true, this->got_
, rel_plt
,
9748 this->rel_dyn_
, true, false);
9750 Output_data_dynamic
* const odyn
= layout
->dynamic_data();
9752 && !parameters
->options().relocatable()
9753 && !parameters
->doing_static_link())
9756 // This element holds a 32-bit version id for the Runtime
9757 // Linker Interface. This will start at integer value 1.
9759 odyn
->add_constant(elfcpp::DT_MIPS_RLD_VERSION
, d_val
);
9762 d_val
= elfcpp::RHF_NOTPOT
;
9763 odyn
->add_constant(elfcpp::DT_MIPS_FLAGS
, d_val
);
9765 // Save layout for using when emitting custom dynamic tags.
9766 this->layout_
= layout
;
9768 // This member holds the base address of the segment.
9769 odyn
->add_custom(elfcpp::DT_MIPS_BASE_ADDRESS
);
9771 // This member holds the number of entries in the .dynsym section.
9772 odyn
->add_custom(elfcpp::DT_MIPS_SYMTABNO
);
9774 // This member holds the index of the first dynamic symbol
9775 // table entry that corresponds to an entry in the global offset table.
9776 odyn
->add_custom(elfcpp::DT_MIPS_GOTSYM
);
9778 // This member holds the number of local GOT entries.
9779 odyn
->add_constant(elfcpp::DT_MIPS_LOCAL_GOTNO
,
9780 this->got_
->get_local_gotno());
9782 if (this->plt_
!= NULL
)
9783 // DT_MIPS_PLTGOT dynamic tag
9784 odyn
->add_section_address(elfcpp::DT_MIPS_PLTGOT
, this->got_plt_
);
9786 if (!parameters
->options().shared())
9788 this->rld_map_
= new Output_data_zero_fill(size
/ 8, size
/ 8);
9790 layout
->add_output_section_data(".rld_map", elfcpp::SHT_PROGBITS
,
9791 (elfcpp::SHF_ALLOC
| elfcpp::SHF_WRITE
),
9792 this->rld_map_
, ORDER_INVALID
, false);
9794 // __RLD_MAP will be filled in by the runtime loader to contain
9795 // a pointer to the _r_debug structure.
9796 Symbol
* rld_map
= symtab
->define_in_output_data("__RLD_MAP", NULL
,
9797 Symbol_table::PREDEFINED
,
9799 0, 0, elfcpp::STT_OBJECT
,
9801 elfcpp::STV_DEFAULT
, 0,
9804 if (!rld_map
->is_forced_local())
9805 rld_map
->set_needs_dynsym_entry();
9807 if (!parameters
->options().pie())
9808 // This member holds the absolute address of the debug pointer.
9809 odyn
->add_section_address(elfcpp::DT_MIPS_RLD_MAP
, this->rld_map_
);
9811 // This member holds the offset to the debug pointer,
9812 // relative to the address of the tag.
9813 odyn
->add_custom(elfcpp::DT_MIPS_RLD_MAP_REL
);
9818 // Get the custom dynamic tag value.
9819 template<int size
, bool big_endian
>
9821 Target_mips
<size
, big_endian
>::do_dynamic_tag_custom_value(elfcpp::DT tag
) const
9825 case elfcpp::DT_MIPS_BASE_ADDRESS
:
9827 // The base address of the segment.
9828 // At this point, the segment list has been sorted into final order,
9829 // so just return vaddr of the first readable PT_LOAD segment.
9830 Output_segment
* seg
=
9831 this->layout_
->find_output_segment(elfcpp::PT_LOAD
, elfcpp::PF_R
, 0);
9832 gold_assert(seg
!= NULL
);
9833 return seg
->vaddr();
9836 case elfcpp::DT_MIPS_SYMTABNO
:
9837 // The number of entries in the .dynsym section.
9838 return this->get_dt_mips_symtabno();
9840 case elfcpp::DT_MIPS_GOTSYM
:
9842 // The index of the first dynamic symbol table entry that corresponds
9843 // to an entry in the GOT.
9844 if (this->got_
->first_global_got_dynsym_index() != -1U)
9845 return this->got_
->first_global_got_dynsym_index();
9847 // In case if we don't have global GOT symbols we default to setting
9848 // DT_MIPS_GOTSYM to the same value as DT_MIPS_SYMTABNO.
9849 return this->get_dt_mips_symtabno();
9852 case elfcpp::DT_MIPS_RLD_MAP_REL
:
9854 // The MIPS_RLD_MAP_REL tag stores the offset to the debug pointer,
9855 // relative to the address of the tag.
9856 Output_data_dynamic
* const odyn
= this->layout_
->dynamic_data();
9857 unsigned int entry_offset
=
9858 odyn
->get_entry_offset(elfcpp::DT_MIPS_RLD_MAP_REL
);
9859 gold_assert(entry_offset
!= -1U);
9860 return this->rld_map_
->address() - (odyn
->address() + entry_offset
);
9863 gold_error(_("Unknown dynamic tag 0x%x"), (unsigned int)tag
);
9866 return (unsigned int)-1;
9869 // Relocate section data.
9871 template<int size
, bool big_endian
>
9873 Target_mips
<size
, big_endian
>::relocate_section(
9874 const Relocate_info
<size
, big_endian
>* relinfo
,
9875 unsigned int sh_type
,
9876 const unsigned char* prelocs
,
9878 Output_section
* output_section
,
9879 bool needs_special_offset_handling
,
9880 unsigned char* view
,
9881 Mips_address address
,
9882 section_size_type view_size
,
9883 const Reloc_symbol_changes
* reloc_symbol_changes
)
9885 typedef Target_mips
<size
, big_endian
> Mips
;
9886 typedef typename Target_mips
<size
, big_endian
>::Relocate Mips_relocate
;
9888 if (sh_type
== elfcpp::SHT_REL
)
9890 typedef Mips_classify_reloc
<elfcpp::SHT_REL
, size
, big_endian
>
9893 gold::relocate_section
<size
, big_endian
, Mips
, Mips_relocate
,
9894 gold::Default_comdat_behavior
, Classify_reloc
>(
9900 needs_special_offset_handling
,
9904 reloc_symbol_changes
);
9906 else if (sh_type
== elfcpp::SHT_RELA
)
9908 typedef Mips_classify_reloc
<elfcpp::SHT_RELA
, size
, big_endian
>
9911 gold::relocate_section
<size
, big_endian
, Mips
, Mips_relocate
,
9912 gold::Default_comdat_behavior
, Classify_reloc
>(
9918 needs_special_offset_handling
,
9922 reloc_symbol_changes
);
9926 // Return the size of a relocation while scanning during a relocatable
9930 mips_get_size_for_reloc(unsigned int r_type
, Relobj
* object
)
9934 case elfcpp::R_MIPS_NONE
:
9935 case elfcpp::R_MIPS_TLS_DTPMOD64
:
9936 case elfcpp::R_MIPS_TLS_DTPREL64
:
9937 case elfcpp::R_MIPS_TLS_TPREL64
:
9940 case elfcpp::R_MIPS_32
:
9941 case elfcpp::R_MIPS_TLS_DTPMOD32
:
9942 case elfcpp::R_MIPS_TLS_DTPREL32
:
9943 case elfcpp::R_MIPS_TLS_TPREL32
:
9944 case elfcpp::R_MIPS_REL32
:
9945 case elfcpp::R_MIPS_PC32
:
9946 case elfcpp::R_MIPS_GPREL32
:
9947 case elfcpp::R_MIPS_JALR
:
9948 case elfcpp::R_MIPS_EH
:
9951 case elfcpp::R_MIPS_16
:
9952 case elfcpp::R_MIPS_HI16
:
9953 case elfcpp::R_MIPS_LO16
:
9954 case elfcpp::R_MIPS_HIGHER
:
9955 case elfcpp::R_MIPS_HIGHEST
:
9956 case elfcpp::R_MIPS_GPREL16
:
9957 case elfcpp::R_MIPS16_HI16
:
9958 case elfcpp::R_MIPS16_LO16
:
9959 case elfcpp::R_MIPS_PC16
:
9960 case elfcpp::R_MIPS_PCHI16
:
9961 case elfcpp::R_MIPS_PCLO16
:
9962 case elfcpp::R_MIPS_GOT16
:
9963 case elfcpp::R_MIPS16_GOT16
:
9964 case elfcpp::R_MIPS_CALL16
:
9965 case elfcpp::R_MIPS16_CALL16
:
9966 case elfcpp::R_MIPS_GOT_HI16
:
9967 case elfcpp::R_MIPS_CALL_HI16
:
9968 case elfcpp::R_MIPS_GOT_LO16
:
9969 case elfcpp::R_MIPS_CALL_LO16
:
9970 case elfcpp::R_MIPS_TLS_DTPREL_HI16
:
9971 case elfcpp::R_MIPS_TLS_DTPREL_LO16
:
9972 case elfcpp::R_MIPS_TLS_TPREL_HI16
:
9973 case elfcpp::R_MIPS_TLS_TPREL_LO16
:
9974 case elfcpp::R_MIPS16_GPREL
:
9975 case elfcpp::R_MIPS_GOT_DISP
:
9976 case elfcpp::R_MIPS_LITERAL
:
9977 case elfcpp::R_MIPS_GOT_PAGE
:
9978 case elfcpp::R_MIPS_GOT_OFST
:
9979 case elfcpp::R_MIPS_TLS_GD
:
9980 case elfcpp::R_MIPS_TLS_LDM
:
9981 case elfcpp::R_MIPS_TLS_GOTTPREL
:
9984 // These relocations are not byte sized
9985 case elfcpp::R_MIPS_26
:
9986 case elfcpp::R_MIPS16_26
:
9987 case elfcpp::R_MIPS_PC21_S2
:
9988 case elfcpp::R_MIPS_PC26_S2
:
9989 case elfcpp::R_MIPS_PC18_S3
:
9990 case elfcpp::R_MIPS_PC19_S2
:
9993 case elfcpp::R_MIPS_COPY
:
9994 case elfcpp::R_MIPS_JUMP_SLOT
:
9995 object
->error(_("unexpected reloc %u in object file"), r_type
);
9999 object
->error(_("unsupported reloc %u in object file"), r_type
);
10004 // Scan the relocs during a relocatable link.
10006 template<int size
, bool big_endian
>
10008 Target_mips
<size
, big_endian
>::scan_relocatable_relocs(
10009 Symbol_table
* symtab
,
10011 Sized_relobj_file
<size
, big_endian
>* object
,
10012 unsigned int data_shndx
,
10013 unsigned int sh_type
,
10014 const unsigned char* prelocs
,
10015 size_t reloc_count
,
10016 Output_section
* output_section
,
10017 bool needs_special_offset_handling
,
10018 size_t local_symbol_count
,
10019 const unsigned char* plocal_symbols
,
10020 Relocatable_relocs
* rr
)
10022 if (sh_type
== elfcpp::SHT_REL
)
10024 typedef Mips_classify_reloc
<elfcpp::SHT_REL
, size
, big_endian
>
10026 typedef Mips_scan_relocatable_relocs
<big_endian
, Classify_reloc
>
10027 Scan_relocatable_relocs
;
10029 gold::scan_relocatable_relocs
<size
, big_endian
, Scan_relocatable_relocs
>(
10037 needs_special_offset_handling
,
10038 local_symbol_count
,
10042 else if (sh_type
== elfcpp::SHT_RELA
)
10044 typedef Mips_classify_reloc
<elfcpp::SHT_RELA
, size
, big_endian
>
10046 typedef Mips_scan_relocatable_relocs
<big_endian
, Classify_reloc
>
10047 Scan_relocatable_relocs
;
10049 gold::scan_relocatable_relocs
<size
, big_endian
, Scan_relocatable_relocs
>(
10057 needs_special_offset_handling
,
10058 local_symbol_count
,
10063 gold_unreachable();
10066 // Scan the relocs for --emit-relocs.
10068 template<int size
, bool big_endian
>
10070 Target_mips
<size
, big_endian
>::emit_relocs_scan(
10071 Symbol_table
* symtab
,
10073 Sized_relobj_file
<size
, big_endian
>* object
,
10074 unsigned int data_shndx
,
10075 unsigned int sh_type
,
10076 const unsigned char* prelocs
,
10077 size_t reloc_count
,
10078 Output_section
* output_section
,
10079 bool needs_special_offset_handling
,
10080 size_t local_symbol_count
,
10081 const unsigned char* plocal_syms
,
10082 Relocatable_relocs
* rr
)
10084 if (sh_type
== elfcpp::SHT_REL
)
10086 typedef Mips_classify_reloc
<elfcpp::SHT_REL
, size
, big_endian
>
10088 typedef gold::Default_emit_relocs_strategy
<Classify_reloc
>
10089 Emit_relocs_strategy
;
10091 gold::scan_relocatable_relocs
<size
, big_endian
, Emit_relocs_strategy
>(
10099 needs_special_offset_handling
,
10100 local_symbol_count
,
10104 else if (sh_type
== elfcpp::SHT_RELA
)
10106 typedef Mips_classify_reloc
<elfcpp::SHT_RELA
, size
, big_endian
>
10108 typedef gold::Default_emit_relocs_strategy
<Classify_reloc
>
10109 Emit_relocs_strategy
;
10111 gold::scan_relocatable_relocs
<size
, big_endian
, Emit_relocs_strategy
>(
10119 needs_special_offset_handling
,
10120 local_symbol_count
,
10125 gold_unreachable();
10128 // Emit relocations for a section.
10130 template<int size
, bool big_endian
>
10132 Target_mips
<size
, big_endian
>::relocate_relocs(
10133 const Relocate_info
<size
, big_endian
>* relinfo
,
10134 unsigned int sh_type
,
10135 const unsigned char* prelocs
,
10136 size_t reloc_count
,
10137 Output_section
* output_section
,
10138 typename
elfcpp::Elf_types
<size
>::Elf_Off
10139 offset_in_output_section
,
10140 unsigned char* view
,
10141 Mips_address view_address
,
10142 section_size_type view_size
,
10143 unsigned char* reloc_view
,
10144 section_size_type reloc_view_size
)
10146 if (sh_type
== elfcpp::SHT_REL
)
10148 typedef Mips_classify_reloc
<elfcpp::SHT_REL
, size
, big_endian
>
10151 gold::relocate_relocs
<size
, big_endian
, Classify_reloc
>(
10156 offset_in_output_section
,
10163 else if (sh_type
== elfcpp::SHT_RELA
)
10165 typedef Mips_classify_reloc
<elfcpp::SHT_RELA
, size
, big_endian
>
10168 gold::relocate_relocs
<size
, big_endian
, Classify_reloc
>(
10173 offset_in_output_section
,
10181 gold_unreachable();
10184 // Perform target-specific processing in a relocatable link. This is
10185 // only used if we use the relocation strategy RELOC_SPECIAL.
10187 template<int size
, bool big_endian
>
10189 Target_mips
<size
, big_endian
>::relocate_special_relocatable(
10190 const Relocate_info
<size
, big_endian
>* relinfo
,
10191 unsigned int sh_type
,
10192 const unsigned char* preloc_in
,
10194 Output_section
* output_section
,
10195 typename
elfcpp::Elf_types
<size
>::Elf_Off offset_in_output_section
,
10196 unsigned char* view
,
10197 Mips_address view_address
,
10199 unsigned char* preloc_out
)
10201 // We can only handle REL type relocation sections.
10202 gold_assert(sh_type
== elfcpp::SHT_REL
);
10204 typedef typename Reloc_types
<elfcpp::SHT_REL
, size
, big_endian
>::Reloc
10206 typedef typename Reloc_types
<elfcpp::SHT_REL
, size
, big_endian
>::Reloc_write
10209 typedef Mips_relocate_functions
<size
, big_endian
> Reloc_funcs
;
10211 const Mips_address invalid_address
= static_cast<Mips_address
>(0) - 1;
10213 Mips_relobj
<size
, big_endian
>* object
=
10214 Mips_relobj
<size
, big_endian
>::as_mips_relobj(relinfo
->object
);
10215 const unsigned int local_count
= object
->local_symbol_count();
10217 Reltype
reloc(preloc_in
);
10218 Reltype_write
reloc_write(preloc_out
);
10220 elfcpp::Elf_types
<32>::Elf_WXword r_info
= reloc
.get_r_info();
10221 const unsigned int r_sym
= elfcpp::elf_r_sym
<size
>(r_info
);
10222 const unsigned int r_type
= elfcpp::elf_r_type
<size
>(r_info
);
10224 // Get the new symbol index.
10225 // We only use RELOC_SPECIAL strategy in local relocations.
10226 gold_assert(r_sym
< local_count
);
10228 // We are adjusting a section symbol. We need to find
10229 // the symbol table index of the section symbol for
10230 // the output section corresponding to input section
10231 // in which this symbol is defined.
10233 unsigned int shndx
= object
->local_symbol_input_shndx(r_sym
, &is_ordinary
);
10234 gold_assert(is_ordinary
);
10235 Output_section
* os
= object
->output_section(shndx
);
10236 gold_assert(os
!= NULL
);
10237 gold_assert(os
->needs_symtab_index());
10238 unsigned int new_symndx
= os
->symtab_index();
10240 // Get the new offset--the location in the output section where
10241 // this relocation should be applied.
10243 Mips_address offset
= reloc
.get_r_offset();
10244 Mips_address new_offset
;
10245 if (offset_in_output_section
!= invalid_address
)
10246 new_offset
= offset
+ offset_in_output_section
;
10249 section_offset_type sot_offset
=
10250 convert_types
<section_offset_type
, Mips_address
>(offset
);
10251 section_offset_type new_sot_offset
=
10252 output_section
->output_offset(object
, relinfo
->data_shndx
,
10254 gold_assert(new_sot_offset
!= -1);
10255 new_offset
= new_sot_offset
;
10258 // In an object file, r_offset is an offset within the section.
10259 // In an executable or dynamic object, generated by
10260 // --emit-relocs, r_offset is an absolute address.
10261 if (!parameters
->options().relocatable())
10263 new_offset
+= view_address
;
10264 if (offset_in_output_section
!= invalid_address
)
10265 new_offset
-= offset_in_output_section
;
10268 reloc_write
.put_r_offset(new_offset
);
10269 reloc_write
.put_r_info(elfcpp::elf_r_info
<32>(new_symndx
, r_type
));
10271 // Handle the reloc addend.
10272 // The relocation uses a section symbol in the input file.
10273 // We are adjusting it to use a section symbol in the output
10274 // file. The input section symbol refers to some address in
10275 // the input section. We need the relocation in the output
10276 // file to refer to that same address. This adjustment to
10277 // the addend is the same calculation we use for a simple
10278 // absolute relocation for the input section symbol.
10279 Valtype calculated_value
= 0;
10280 const Symbol_value
<size
>* psymval
= object
->local_symbol(r_sym
);
10282 unsigned char* paddend
= view
+ offset
;
10283 typename
Reloc_funcs::Status reloc_status
= Reloc_funcs::STATUS_OKAY
;
10286 case elfcpp::R_MIPS_26
:
10287 reloc_status
= Reloc_funcs::rel26(paddend
, object
, psymval
,
10288 offset_in_output_section
, true, 0, sh_type
== elfcpp::SHT_REL
, NULL
,
10289 false /*TODO(sasa): cross mode jump*/, r_type
, this->jal_to_bal(),
10290 false, &calculated_value
);
10294 gold_unreachable();
10297 // Report any errors.
10298 switch (reloc_status
)
10300 case Reloc_funcs::STATUS_OKAY
:
10302 case Reloc_funcs::STATUS_OVERFLOW
:
10303 gold_error_at_location(relinfo
, relnum
, reloc
.get_r_offset(),
10304 _("relocation overflow: "
10305 "%u against local symbol %u in %s"),
10306 r_type
, r_sym
, object
->name().c_str());
10308 case Reloc_funcs::STATUS_BAD_RELOC
:
10309 gold_error_at_location(relinfo
, relnum
, reloc
.get_r_offset(),
10310 _("unexpected opcode while processing relocation"));
10313 gold_unreachable();
10317 // Optimize the TLS relocation type based on what we know about the
10318 // symbol. IS_FINAL is true if the final address of this symbol is
10319 // known at link time.
10321 template<int size
, bool big_endian
>
10322 tls::Tls_optimization
10323 Target_mips
<size
, big_endian
>::optimize_tls_reloc(bool, int)
10325 // FIXME: Currently we do not do any TLS optimization.
10326 return tls::TLSOPT_NONE
;
10329 // Scan a relocation for a local symbol.
10331 template<int size
, bool big_endian
>
10333 Target_mips
<size
, big_endian
>::Scan::local(
10334 Symbol_table
* symtab
,
10336 Target_mips
<size
, big_endian
>* target
,
10337 Sized_relobj_file
<size
, big_endian
>* object
,
10338 unsigned int data_shndx
,
10339 Output_section
* output_section
,
10340 const Relatype
* rela
,
10341 const Reltype
* rel
,
10342 unsigned int rel_type
,
10343 unsigned int r_type
,
10344 const elfcpp::Sym
<size
, big_endian
>& lsym
,
10350 Mips_address r_offset
;
10351 unsigned int r_sym
;
10352 typename
elfcpp::Elf_types
<size
>::Elf_Swxword r_addend
;
10354 if (rel_type
== elfcpp::SHT_RELA
)
10356 r_offset
= rela
->get_r_offset();
10357 r_sym
= Mips_classify_reloc
<elfcpp::SHT_RELA
, size
, big_endian
>::
10359 r_addend
= rela
->get_r_addend();
10363 r_offset
= rel
->get_r_offset();
10364 r_sym
= Mips_classify_reloc
<elfcpp::SHT_REL
, size
, big_endian
>::
10369 Mips_relobj
<size
, big_endian
>* mips_obj
=
10370 Mips_relobj
<size
, big_endian
>::as_mips_relobj(object
);
10372 if (mips_obj
->is_mips16_stub_section(data_shndx
))
10374 mips_obj
->get_mips16_stub_section(data_shndx
)
10375 ->new_local_reloc_found(r_type
, r_sym
);
10378 if (r_type
== elfcpp::R_MIPS_NONE
)
10379 // R_MIPS_NONE is used in mips16 stub sections, to define the target of the
10383 if (!mips16_call_reloc(r_type
)
10384 && !mips_obj
->section_allows_mips16_refs(data_shndx
))
10385 // This reloc would need to refer to a MIPS16 hard-float stub, if
10386 // there is one. We ignore MIPS16 stub sections and .pdr section when
10387 // looking for relocs that would need to refer to MIPS16 stubs.
10388 mips_obj
->add_local_non_16bit_call(r_sym
);
10390 if (r_type
== elfcpp::R_MIPS16_26
10391 && !mips_obj
->section_allows_mips16_refs(data_shndx
))
10392 mips_obj
->add_local_16bit_call(r_sym
);
10396 case elfcpp::R_MIPS_GOT16
:
10397 case elfcpp::R_MIPS_CALL16
:
10398 case elfcpp::R_MIPS_CALL_HI16
:
10399 case elfcpp::R_MIPS_CALL_LO16
:
10400 case elfcpp::R_MIPS_GOT_HI16
:
10401 case elfcpp::R_MIPS_GOT_LO16
:
10402 case elfcpp::R_MIPS_GOT_PAGE
:
10403 case elfcpp::R_MIPS_GOT_OFST
:
10404 case elfcpp::R_MIPS_GOT_DISP
:
10405 case elfcpp::R_MIPS_TLS_GOTTPREL
:
10406 case elfcpp::R_MIPS_TLS_GD
:
10407 case elfcpp::R_MIPS_TLS_LDM
:
10408 case elfcpp::R_MIPS16_GOT16
:
10409 case elfcpp::R_MIPS16_CALL16
:
10410 case elfcpp::R_MIPS16_TLS_GOTTPREL
:
10411 case elfcpp::R_MIPS16_TLS_GD
:
10412 case elfcpp::R_MIPS16_TLS_LDM
:
10413 case elfcpp::R_MICROMIPS_GOT16
:
10414 case elfcpp::R_MICROMIPS_CALL16
:
10415 case elfcpp::R_MICROMIPS_CALL_HI16
:
10416 case elfcpp::R_MICROMIPS_CALL_LO16
:
10417 case elfcpp::R_MICROMIPS_GOT_HI16
:
10418 case elfcpp::R_MICROMIPS_GOT_LO16
:
10419 case elfcpp::R_MICROMIPS_GOT_PAGE
:
10420 case elfcpp::R_MICROMIPS_GOT_OFST
:
10421 case elfcpp::R_MICROMIPS_GOT_DISP
:
10422 case elfcpp::R_MICROMIPS_TLS_GOTTPREL
:
10423 case elfcpp::R_MICROMIPS_TLS_GD
:
10424 case elfcpp::R_MICROMIPS_TLS_LDM
:
10425 case elfcpp::R_MIPS_EH
:
10426 // We need a GOT section.
10427 target
->got_section(symtab
, layout
);
10434 if (call_lo16_reloc(r_type
)
10435 || got_lo16_reloc(r_type
)
10436 || got_disp_reloc(r_type
)
10437 || eh_reloc(r_type
))
10439 // We may need a local GOT entry for this relocation. We
10440 // don't count R_MIPS_GOT_PAGE because we can estimate the
10441 // maximum number of pages needed by looking at the size of
10442 // the segment. Similar comments apply to R_MIPS*_GOT16 and
10443 // R_MIPS*_CALL16. We don't count R_MIPS_GOT_HI16, or
10444 // R_MIPS_CALL_HI16 because these are always followed by an
10445 // R_MIPS_GOT_LO16 or R_MIPS_CALL_LO16.
10446 Mips_output_data_got
<size
, big_endian
>* got
=
10447 target
->got_section(symtab
, layout
);
10448 bool is_section_symbol
= lsym
.get_st_type() == elfcpp::STT_SECTION
;
10449 got
->record_local_got_symbol(mips_obj
, r_sym
, r_addend
, r_type
, -1U,
10450 is_section_symbol
);
10455 case elfcpp::R_MIPS_CALL16
:
10456 case elfcpp::R_MIPS16_CALL16
:
10457 case elfcpp::R_MICROMIPS_CALL16
:
10458 gold_error(_("CALL16 reloc at 0x%lx not against global symbol "),
10459 (unsigned long)r_offset
);
10462 case elfcpp::R_MIPS_GOT_PAGE
:
10463 case elfcpp::R_MICROMIPS_GOT_PAGE
:
10464 case elfcpp::R_MIPS16_GOT16
:
10465 case elfcpp::R_MIPS_GOT16
:
10466 case elfcpp::R_MIPS_GOT_HI16
:
10467 case elfcpp::R_MIPS_GOT_LO16
:
10468 case elfcpp::R_MICROMIPS_GOT16
:
10469 case elfcpp::R_MICROMIPS_GOT_HI16
:
10470 case elfcpp::R_MICROMIPS_GOT_LO16
:
10472 // This relocation needs a page entry in the GOT.
10473 // Get the section contents.
10474 section_size_type view_size
= 0;
10475 const unsigned char* view
= object
->section_contents(data_shndx
,
10476 &view_size
, false);
10479 Valtype32 val
= elfcpp::Swap
<32, big_endian
>::readval(view
);
10480 Valtype32 addend
= (rel_type
== elfcpp::SHT_REL
? val
& 0xffff
10483 if (rel_type
== elfcpp::SHT_REL
&& got16_reloc(r_type
))
10484 target
->got16_addends_
.push_back(got16_addend
<size
, big_endian
>(
10485 object
, data_shndx
, r_type
, r_sym
, addend
));
10487 target
->got_section()->record_got_page_entry(mips_obj
, r_sym
, addend
);
10491 case elfcpp::R_MIPS_HI16
:
10492 case elfcpp::R_MIPS_PCHI16
:
10493 case elfcpp::R_MIPS16_HI16
:
10494 case elfcpp::R_MICROMIPS_HI16
:
10495 // Record the reloc so that we can check whether the corresponding LO16
10497 if (rel_type
== elfcpp::SHT_REL
)
10498 target
->got16_addends_
.push_back(got16_addend
<size
, big_endian
>(
10499 object
, data_shndx
, r_type
, r_sym
, 0));
10502 case elfcpp::R_MIPS_LO16
:
10503 case elfcpp::R_MIPS_PCLO16
:
10504 case elfcpp::R_MIPS16_LO16
:
10505 case elfcpp::R_MICROMIPS_LO16
:
10507 if (rel_type
!= elfcpp::SHT_REL
)
10510 // Find corresponding GOT16/HI16 relocation.
10512 // According to the MIPS ELF ABI, the R_MIPS_LO16 relocation must
10513 // be immediately following. However, for the IRIX6 ABI, the next
10514 // relocation may be a composed relocation consisting of several
10515 // relocations for the same address. In that case, the R_MIPS_LO16
10516 // relocation may occur as one of these. We permit a similar
10517 // extension in general, as that is useful for GCC.
10519 // In some cases GCC dead code elimination removes the LO16 but
10520 // keeps the corresponding HI16. This is strictly speaking a
10521 // violation of the ABI but not immediately harmful.
10523 typename
std::list
<got16_addend
<size
, big_endian
> >::iterator it
=
10524 target
->got16_addends_
.begin();
10525 while (it
!= target
->got16_addends_
.end())
10527 got16_addend
<size
, big_endian
> _got16_addend
= *it
;
10529 // TODO(sasa): Split got16_addends_ list into two lists - one for
10530 // GOT16 relocs and the other for HI16 relocs.
10532 // Report an error if we find HI16 or GOT16 reloc from the
10533 // previous section without the matching LO16 part.
10534 if (_got16_addend
.object
!= object
10535 || _got16_addend
.shndx
!= data_shndx
)
10537 gold_error("Can't find matching LO16 reloc");
10541 if (_got16_addend
.r_sym
!= r_sym
10542 || !is_matching_lo16_reloc(_got16_addend
.r_type
, r_type
))
10548 // We found a matching HI16 or GOT16 reloc for this LO16 reloc.
10549 // For GOT16, we need to calculate combined addend and record GOT page
10551 if (got16_reloc(_got16_addend
.r_type
))
10554 section_size_type view_size
= 0;
10555 const unsigned char* view
= object
->section_contents(data_shndx
,
10560 Valtype32 val
= elfcpp::Swap
<32, big_endian
>::readval(view
);
10561 int32_t addend
= Bits
<16>::sign_extend32(val
& 0xffff);
10563 addend
= (_got16_addend
.addend
<< 16) + addend
;
10564 target
->got_section()->record_got_page_entry(mips_obj
, r_sym
,
10568 it
= target
->got16_addends_
.erase(it
);
10576 case elfcpp::R_MIPS_32
:
10577 case elfcpp::R_MIPS_REL32
:
10578 case elfcpp::R_MIPS_64
:
10580 if (parameters
->options().output_is_position_independent())
10582 // If building a shared library (or a position-independent
10583 // executable), we need to create a dynamic relocation for
10585 if (is_readonly_section(output_section
))
10587 Reloc_section
* rel_dyn
= target
->rel_dyn_section(layout
);
10588 rel_dyn
->add_symbolless_local_addend(object
, r_sym
,
10589 elfcpp::R_MIPS_REL32
,
10590 output_section
, data_shndx
,
10596 case elfcpp::R_MIPS_TLS_GOTTPREL
:
10597 case elfcpp::R_MIPS16_TLS_GOTTPREL
:
10598 case elfcpp::R_MICROMIPS_TLS_GOTTPREL
:
10599 case elfcpp::R_MIPS_TLS_LDM
:
10600 case elfcpp::R_MIPS16_TLS_LDM
:
10601 case elfcpp::R_MICROMIPS_TLS_LDM
:
10602 case elfcpp::R_MIPS_TLS_GD
:
10603 case elfcpp::R_MIPS16_TLS_GD
:
10604 case elfcpp::R_MICROMIPS_TLS_GD
:
10606 bool output_is_shared
= parameters
->options().shared();
10607 const tls::Tls_optimization optimized_type
10608 = Target_mips
<size
, big_endian
>::optimize_tls_reloc(
10609 !output_is_shared
, r_type
);
10612 case elfcpp::R_MIPS_TLS_GD
:
10613 case elfcpp::R_MIPS16_TLS_GD
:
10614 case elfcpp::R_MICROMIPS_TLS_GD
:
10615 if (optimized_type
== tls::TLSOPT_NONE
)
10617 // Create a pair of GOT entries for the module index and
10618 // dtv-relative offset.
10619 Mips_output_data_got
<size
, big_endian
>* got
=
10620 target
->got_section(symtab
, layout
);
10621 unsigned int shndx
= lsym
.get_st_shndx();
10623 shndx
= object
->adjust_sym_shndx(r_sym
, shndx
, &is_ordinary
);
10626 object
->error(_("local symbol %u has bad shndx %u"),
10630 got
->record_local_got_symbol(mips_obj
, r_sym
, r_addend
, r_type
,
10635 // FIXME: TLS optimization not supported yet.
10636 gold_unreachable();
10640 case elfcpp::R_MIPS_TLS_LDM
:
10641 case elfcpp::R_MIPS16_TLS_LDM
:
10642 case elfcpp::R_MICROMIPS_TLS_LDM
:
10643 if (optimized_type
== tls::TLSOPT_NONE
)
10645 // We always record LDM symbols as local with index 0.
10646 target
->got_section()->record_local_got_symbol(mips_obj
, 0,
10652 // FIXME: TLS optimization not supported yet.
10653 gold_unreachable();
10656 case elfcpp::R_MIPS_TLS_GOTTPREL
:
10657 case elfcpp::R_MIPS16_TLS_GOTTPREL
:
10658 case elfcpp::R_MICROMIPS_TLS_GOTTPREL
:
10659 layout
->set_has_static_tls();
10660 if (optimized_type
== tls::TLSOPT_NONE
)
10662 // Create a GOT entry for the tp-relative offset.
10663 Mips_output_data_got
<size
, big_endian
>* got
=
10664 target
->got_section(symtab
, layout
);
10665 got
->record_local_got_symbol(mips_obj
, r_sym
, r_addend
, r_type
,
10670 // FIXME: TLS optimization not supported yet.
10671 gold_unreachable();
10676 gold_unreachable();
10685 // Refuse some position-dependent relocations when creating a
10686 // shared library. Do not refuse R_MIPS_32 / R_MIPS_64; they're
10687 // not PIC, but we can create dynamic relocations and the result
10688 // will be fine. Also do not refuse R_MIPS_LO16, which can be
10689 // combined with R_MIPS_GOT16.
10690 if (parameters
->options().shared())
10694 case elfcpp::R_MIPS16_HI16
:
10695 case elfcpp::R_MIPS_HI16
:
10696 case elfcpp::R_MIPS_HIGHER
:
10697 case elfcpp::R_MIPS_HIGHEST
:
10698 case elfcpp::R_MICROMIPS_HI16
:
10699 case elfcpp::R_MICROMIPS_HIGHER
:
10700 case elfcpp::R_MICROMIPS_HIGHEST
:
10701 // Don't refuse a high part relocation if it's against
10702 // no symbol (e.g. part of a compound relocation).
10707 case elfcpp::R_MIPS16_26
:
10708 case elfcpp::R_MIPS_26
:
10709 case elfcpp::R_MICROMIPS_26_S1
:
10710 gold_error(_("%s: relocation %u against `%s' can not be used when "
10711 "making a shared object; recompile with -fPIC"),
10712 object
->name().c_str(), r_type
, "a local symbol");
10719 template<int size
, bool big_endian
>
10721 Target_mips
<size
, big_endian
>::Scan::local(
10722 Symbol_table
* symtab
,
10724 Target_mips
<size
, big_endian
>* target
,
10725 Sized_relobj_file
<size
, big_endian
>* object
,
10726 unsigned int data_shndx
,
10727 Output_section
* output_section
,
10728 const Reltype
& reloc
,
10729 unsigned int r_type
,
10730 const elfcpp::Sym
<size
, big_endian
>& lsym
,
10743 (const Relatype
*) NULL
,
10747 lsym
, is_discarded
);
10751 template<int size
, bool big_endian
>
10753 Target_mips
<size
, big_endian
>::Scan::local(
10754 Symbol_table
* symtab
,
10756 Target_mips
<size
, big_endian
>* target
,
10757 Sized_relobj_file
<size
, big_endian
>* object
,
10758 unsigned int data_shndx
,
10759 Output_section
* output_section
,
10760 const Relatype
& reloc
,
10761 unsigned int r_type
,
10762 const elfcpp::Sym
<size
, big_endian
>& lsym
,
10776 (const Reltype
*) NULL
,
10779 lsym
, is_discarded
);
10782 // Scan a relocation for a global symbol.
10784 template<int size
, bool big_endian
>
10786 Target_mips
<size
, big_endian
>::Scan::global(
10787 Symbol_table
* symtab
,
10789 Target_mips
<size
, big_endian
>* target
,
10790 Sized_relobj_file
<size
, big_endian
>* object
,
10791 unsigned int data_shndx
,
10792 Output_section
* output_section
,
10793 const Relatype
* rela
,
10794 const Reltype
* rel
,
10795 unsigned int rel_type
,
10796 unsigned int r_type
,
10799 Mips_address r_offset
;
10800 unsigned int r_sym
;
10801 typename
elfcpp::Elf_types
<size
>::Elf_Swxword r_addend
;
10803 if (rel_type
== elfcpp::SHT_RELA
)
10805 r_offset
= rela
->get_r_offset();
10806 r_sym
= Mips_classify_reloc
<elfcpp::SHT_RELA
, size
, big_endian
>::
10808 r_addend
= rela
->get_r_addend();
10812 r_offset
= rel
->get_r_offset();
10813 r_sym
= Mips_classify_reloc
<elfcpp::SHT_REL
, size
, big_endian
>::
10818 Mips_relobj
<size
, big_endian
>* mips_obj
=
10819 Mips_relobj
<size
, big_endian
>::as_mips_relobj(object
);
10820 Mips_symbol
<size
>* mips_sym
= Mips_symbol
<size
>::as_mips_sym(gsym
);
10822 if (mips_obj
->is_mips16_stub_section(data_shndx
))
10824 mips_obj
->get_mips16_stub_section(data_shndx
)
10825 ->new_global_reloc_found(r_type
, mips_sym
);
10828 if (r_type
== elfcpp::R_MIPS_NONE
)
10829 // R_MIPS_NONE is used in mips16 stub sections, to define the target of the
10833 if (!mips16_call_reloc(r_type
)
10834 && !mips_obj
->section_allows_mips16_refs(data_shndx
))
10835 // This reloc would need to refer to a MIPS16 hard-float stub, if
10836 // there is one. We ignore MIPS16 stub sections and .pdr section when
10837 // looking for relocs that would need to refer to MIPS16 stubs.
10838 mips_sym
->set_need_fn_stub();
10840 // We need PLT entries if there are static-only relocations against
10841 // an externally-defined function. This can technically occur for
10842 // shared libraries if there are branches to the symbol, although it
10843 // is unlikely that this will be used in practice due to the short
10844 // ranges involved. It can occur for any relative or absolute relocation
10845 // in executables; in that case, the PLT entry becomes the function's
10846 // canonical address.
10847 bool static_reloc
= false;
10849 // Set CAN_MAKE_DYNAMIC to true if we can convert this
10850 // relocation into a dynamic one.
10851 bool can_make_dynamic
= false;
10854 case elfcpp::R_MIPS_GOT16
:
10855 case elfcpp::R_MIPS_CALL16
:
10856 case elfcpp::R_MIPS_CALL_HI16
:
10857 case elfcpp::R_MIPS_CALL_LO16
:
10858 case elfcpp::R_MIPS_GOT_HI16
:
10859 case elfcpp::R_MIPS_GOT_LO16
:
10860 case elfcpp::R_MIPS_GOT_PAGE
:
10861 case elfcpp::R_MIPS_GOT_OFST
:
10862 case elfcpp::R_MIPS_GOT_DISP
:
10863 case elfcpp::R_MIPS_TLS_GOTTPREL
:
10864 case elfcpp::R_MIPS_TLS_GD
:
10865 case elfcpp::R_MIPS_TLS_LDM
:
10866 case elfcpp::R_MIPS16_GOT16
:
10867 case elfcpp::R_MIPS16_CALL16
:
10868 case elfcpp::R_MIPS16_TLS_GOTTPREL
:
10869 case elfcpp::R_MIPS16_TLS_GD
:
10870 case elfcpp::R_MIPS16_TLS_LDM
:
10871 case elfcpp::R_MICROMIPS_GOT16
:
10872 case elfcpp::R_MICROMIPS_CALL16
:
10873 case elfcpp::R_MICROMIPS_CALL_HI16
:
10874 case elfcpp::R_MICROMIPS_CALL_LO16
:
10875 case elfcpp::R_MICROMIPS_GOT_HI16
:
10876 case elfcpp::R_MICROMIPS_GOT_LO16
:
10877 case elfcpp::R_MICROMIPS_GOT_PAGE
:
10878 case elfcpp::R_MICROMIPS_GOT_OFST
:
10879 case elfcpp::R_MICROMIPS_GOT_DISP
:
10880 case elfcpp::R_MICROMIPS_TLS_GOTTPREL
:
10881 case elfcpp::R_MICROMIPS_TLS_GD
:
10882 case elfcpp::R_MICROMIPS_TLS_LDM
:
10883 case elfcpp::R_MIPS_EH
:
10884 // We need a GOT section.
10885 target
->got_section(symtab
, layout
);
10888 // This is just a hint; it can safely be ignored. Don't set
10889 // has_static_relocs for the corresponding symbol.
10890 case elfcpp::R_MIPS_JALR
:
10891 case elfcpp::R_MICROMIPS_JALR
:
10894 case elfcpp::R_MIPS_GPREL16
:
10895 case elfcpp::R_MIPS_GPREL32
:
10896 case elfcpp::R_MIPS16_GPREL
:
10897 case elfcpp::R_MICROMIPS_GPREL16
:
10899 // GP-relative relocations always resolve to a definition in a
10900 // regular input file, ignoring the one-definition rule. This is
10901 // important for the GP setup sequence in NewABI code, which
10902 // always resolves to a local function even if other relocations
10903 // against the symbol wouldn't.
10904 //constrain_symbol_p = FALSE;
10907 case elfcpp::R_MIPS_32
:
10908 case elfcpp::R_MIPS_REL32
:
10909 case elfcpp::R_MIPS_64
:
10910 if ((parameters
->options().shared()
10911 || (strcmp(gsym
->name(), "__gnu_local_gp") != 0
10912 && (!is_readonly_section(output_section
)
10913 || mips_obj
->is_pic())))
10914 && (output_section
->flags() & elfcpp::SHF_ALLOC
) != 0)
10916 if (r_type
!= elfcpp::R_MIPS_REL32
)
10917 mips_sym
->set_pointer_equality_needed();
10918 can_make_dynamic
= true;
10924 // Most static relocations require pointer equality, except
10926 mips_sym
->set_pointer_equality_needed();
10929 case elfcpp::R_MIPS_26
:
10930 case elfcpp::R_MIPS_PC16
:
10931 case elfcpp::R_MIPS_PC21_S2
:
10932 case elfcpp::R_MIPS_PC26_S2
:
10933 case elfcpp::R_MIPS16_26
:
10934 case elfcpp::R_MICROMIPS_26_S1
:
10935 case elfcpp::R_MICROMIPS_PC7_S1
:
10936 case elfcpp::R_MICROMIPS_PC10_S1
:
10937 case elfcpp::R_MICROMIPS_PC16_S1
:
10938 case elfcpp::R_MICROMIPS_PC23_S2
:
10939 static_reloc
= true;
10940 mips_sym
->set_has_static_relocs();
10944 // If there are call relocations against an externally-defined symbol,
10945 // see whether we can create a MIPS lazy-binding stub for it. We can
10946 // only do this if all references to the function are through call
10947 // relocations, and in that case, the traditional lazy-binding stubs
10948 // are much more efficient than PLT entries.
10951 case elfcpp::R_MIPS16_CALL16
:
10952 case elfcpp::R_MIPS_CALL16
:
10953 case elfcpp::R_MIPS_CALL_HI16
:
10954 case elfcpp::R_MIPS_CALL_LO16
:
10955 case elfcpp::R_MIPS_JALR
:
10956 case elfcpp::R_MICROMIPS_CALL16
:
10957 case elfcpp::R_MICROMIPS_CALL_HI16
:
10958 case elfcpp::R_MICROMIPS_CALL_LO16
:
10959 case elfcpp::R_MICROMIPS_JALR
:
10960 if (!mips_sym
->no_lazy_stub())
10962 if ((mips_sym
->needs_plt_entry() && mips_sym
->is_from_dynobj())
10963 // Calls from shared objects to undefined symbols of type
10964 // STT_NOTYPE need lazy-binding stub.
10965 || (mips_sym
->is_undefined() && parameters
->options().shared()))
10966 target
->mips_stubs_section(layout
)->make_entry(mips_sym
);
10971 // We must not create a stub for a symbol that has relocations
10972 // related to taking the function's address.
10973 mips_sym
->set_no_lazy_stub();
10974 target
->remove_lazy_stub_entry(mips_sym
);
10979 if (relocation_needs_la25_stub
<size
, big_endian
>(mips_obj
, r_type
,
10980 mips_sym
->is_mips16()))
10981 mips_sym
->set_has_nonpic_branches();
10983 // R_MIPS_HI16 against _gp_disp is used for $gp setup,
10984 // and has a special meaning.
10985 bool gp_disp_against_hi16
= (!mips_obj
->is_newabi()
10986 && strcmp(gsym
->name(), "_gp_disp") == 0
10987 && (hi16_reloc(r_type
) || lo16_reloc(r_type
)));
10988 if (static_reloc
&& gsym
->needs_plt_entry())
10990 target
->make_plt_entry(symtab
, layout
, mips_sym
, r_type
);
10992 // Since this is not a PC-relative relocation, we may be
10993 // taking the address of a function. In that case we need to
10994 // set the entry in the dynamic symbol table to the address of
10996 if (gsym
->is_from_dynobj() && !parameters
->options().shared())
10998 gsym
->set_needs_dynsym_value();
10999 // We distinguish between PLT entries and lazy-binding stubs by
11000 // giving the former an st_other value of STO_MIPS_PLT. Set the
11001 // flag if there are any relocations in the binary where pointer
11002 // equality matters.
11003 if (mips_sym
->pointer_equality_needed())
11004 mips_sym
->set_mips_plt();
11007 if ((static_reloc
|| can_make_dynamic
) && !gp_disp_against_hi16
)
11009 // Absolute addressing relocations.
11010 // Make a dynamic relocation if necessary.
11011 if (gsym
->needs_dynamic_reloc(Scan::get_reference_flags(r_type
)))
11013 if (gsym
->may_need_copy_reloc())
11015 target
->copy_reloc(symtab
, layout
, object
, data_shndx
,
11016 output_section
, gsym
, r_type
, r_offset
);
11018 else if (can_make_dynamic
)
11020 // Create .rel.dyn section.
11021 target
->rel_dyn_section(layout
);
11022 target
->dynamic_reloc(mips_sym
, elfcpp::R_MIPS_REL32
, mips_obj
,
11023 data_shndx
, output_section
, r_offset
);
11026 gold_error(_("non-dynamic relocations refer to dynamic symbol %s"),
11031 bool for_call
= false;
11034 case elfcpp::R_MIPS_CALL16
:
11035 case elfcpp::R_MIPS16_CALL16
:
11036 case elfcpp::R_MICROMIPS_CALL16
:
11037 case elfcpp::R_MIPS_CALL_HI16
:
11038 case elfcpp::R_MIPS_CALL_LO16
:
11039 case elfcpp::R_MICROMIPS_CALL_HI16
:
11040 case elfcpp::R_MICROMIPS_CALL_LO16
:
11044 case elfcpp::R_MIPS16_GOT16
:
11045 case elfcpp::R_MIPS_GOT16
:
11046 case elfcpp::R_MIPS_GOT_HI16
:
11047 case elfcpp::R_MIPS_GOT_LO16
:
11048 case elfcpp::R_MICROMIPS_GOT16
:
11049 case elfcpp::R_MICROMIPS_GOT_HI16
:
11050 case elfcpp::R_MICROMIPS_GOT_LO16
:
11051 case elfcpp::R_MIPS_GOT_DISP
:
11052 case elfcpp::R_MICROMIPS_GOT_DISP
:
11053 case elfcpp::R_MIPS_EH
:
11055 // The symbol requires a GOT entry.
11056 Mips_output_data_got
<size
, big_endian
>* got
=
11057 target
->got_section(symtab
, layout
);
11058 got
->record_global_got_symbol(mips_sym
, mips_obj
, r_type
, false,
11060 mips_sym
->set_global_got_area(GGA_NORMAL
);
11064 case elfcpp::R_MIPS_GOT_PAGE
:
11065 case elfcpp::R_MICROMIPS_GOT_PAGE
:
11067 // This relocation needs a page entry in the GOT.
11068 // Get the section contents.
11069 section_size_type view_size
= 0;
11070 const unsigned char* view
=
11071 object
->section_contents(data_shndx
, &view_size
, false);
11074 Valtype32 val
= elfcpp::Swap
<32, big_endian
>::readval(view
);
11075 Valtype32 addend
= (rel_type
== elfcpp::SHT_REL
? val
& 0xffff
11077 Mips_output_data_got
<size
, big_endian
>* got
=
11078 target
->got_section(symtab
, layout
);
11079 got
->record_got_page_entry(mips_obj
, r_sym
, addend
);
11081 // If this is a global, overridable symbol, GOT_PAGE will
11082 // decay to GOT_DISP, so we'll need a GOT entry for it.
11083 bool def_regular
= (mips_sym
->source() == Symbol::FROM_OBJECT
11084 && !mips_sym
->object()->is_dynamic()
11085 && !mips_sym
->is_undefined());
11087 || (parameters
->options().output_is_position_independent()
11088 && !parameters
->options().Bsymbolic()
11089 && !mips_sym
->is_forced_local()))
11091 got
->record_global_got_symbol(mips_sym
, mips_obj
, r_type
, false,
11093 mips_sym
->set_global_got_area(GGA_NORMAL
);
11098 case elfcpp::R_MIPS_TLS_GOTTPREL
:
11099 case elfcpp::R_MIPS16_TLS_GOTTPREL
:
11100 case elfcpp::R_MICROMIPS_TLS_GOTTPREL
:
11101 case elfcpp::R_MIPS_TLS_LDM
:
11102 case elfcpp::R_MIPS16_TLS_LDM
:
11103 case elfcpp::R_MICROMIPS_TLS_LDM
:
11104 case elfcpp::R_MIPS_TLS_GD
:
11105 case elfcpp::R_MIPS16_TLS_GD
:
11106 case elfcpp::R_MICROMIPS_TLS_GD
:
11108 const bool is_final
= gsym
->final_value_is_known();
11109 const tls::Tls_optimization optimized_type
=
11110 Target_mips
<size
, big_endian
>::optimize_tls_reloc(is_final
, r_type
);
11114 case elfcpp::R_MIPS_TLS_GD
:
11115 case elfcpp::R_MIPS16_TLS_GD
:
11116 case elfcpp::R_MICROMIPS_TLS_GD
:
11117 if (optimized_type
== tls::TLSOPT_NONE
)
11119 // Create a pair of GOT entries for the module index and
11120 // dtv-relative offset.
11121 Mips_output_data_got
<size
, big_endian
>* got
=
11122 target
->got_section(symtab
, layout
);
11123 got
->record_global_got_symbol(mips_sym
, mips_obj
, r_type
, false,
11128 // FIXME: TLS optimization not supported yet.
11129 gold_unreachable();
11133 case elfcpp::R_MIPS_TLS_LDM
:
11134 case elfcpp::R_MIPS16_TLS_LDM
:
11135 case elfcpp::R_MICROMIPS_TLS_LDM
:
11136 if (optimized_type
== tls::TLSOPT_NONE
)
11138 // We always record LDM symbols as local with index 0.
11139 target
->got_section()->record_local_got_symbol(mips_obj
, 0,
11145 // FIXME: TLS optimization not supported yet.
11146 gold_unreachable();
11149 case elfcpp::R_MIPS_TLS_GOTTPREL
:
11150 case elfcpp::R_MIPS16_TLS_GOTTPREL
:
11151 case elfcpp::R_MICROMIPS_TLS_GOTTPREL
:
11152 layout
->set_has_static_tls();
11153 if (optimized_type
== tls::TLSOPT_NONE
)
11155 // Create a GOT entry for the tp-relative offset.
11156 Mips_output_data_got
<size
, big_endian
>* got
=
11157 target
->got_section(symtab
, layout
);
11158 got
->record_global_got_symbol(mips_sym
, mips_obj
, r_type
, false,
11163 // FIXME: TLS optimization not supported yet.
11164 gold_unreachable();
11169 gold_unreachable();
11173 case elfcpp::R_MIPS_COPY
:
11174 case elfcpp::R_MIPS_JUMP_SLOT
:
11175 // These are relocations which should only be seen by the
11176 // dynamic linker, and should never be seen here.
11177 gold_error(_("%s: unexpected reloc %u in object file"),
11178 object
->name().c_str(), r_type
);
11185 // Refuse some position-dependent relocations when creating a
11186 // shared library. Do not refuse R_MIPS_32 / R_MIPS_64; they're
11187 // not PIC, but we can create dynamic relocations and the result
11188 // will be fine. Also do not refuse R_MIPS_LO16, which can be
11189 // combined with R_MIPS_GOT16.
11190 if (parameters
->options().shared())
11194 case elfcpp::R_MIPS16_HI16
:
11195 case elfcpp::R_MIPS_HI16
:
11196 case elfcpp::R_MIPS_HIGHER
:
11197 case elfcpp::R_MIPS_HIGHEST
:
11198 case elfcpp::R_MICROMIPS_HI16
:
11199 case elfcpp::R_MICROMIPS_HIGHER
:
11200 case elfcpp::R_MICROMIPS_HIGHEST
:
11201 // Don't refuse a high part relocation if it's against
11202 // no symbol (e.g. part of a compound relocation).
11206 // R_MIPS_HI16 against _gp_disp is used for $gp setup,
11207 // and has a special meaning.
11208 if (!mips_obj
->is_newabi() && strcmp(gsym
->name(), "_gp_disp") == 0)
11212 case elfcpp::R_MIPS16_26
:
11213 case elfcpp::R_MIPS_26
:
11214 case elfcpp::R_MICROMIPS_26_S1
:
11215 gold_error(_("%s: relocation %u against `%s' can not be used when "
11216 "making a shared object; recompile with -fPIC"),
11217 object
->name().c_str(), r_type
, gsym
->name());
11224 template<int size
, bool big_endian
>
11226 Target_mips
<size
, big_endian
>::Scan::global(
11227 Symbol_table
* symtab
,
11229 Target_mips
<size
, big_endian
>* target
,
11230 Sized_relobj_file
<size
, big_endian
>* object
,
11231 unsigned int data_shndx
,
11232 Output_section
* output_section
,
11233 const Relatype
& reloc
,
11234 unsigned int r_type
,
11245 (const Reltype
*) NULL
,
11251 template<int size
, bool big_endian
>
11253 Target_mips
<size
, big_endian
>::Scan::global(
11254 Symbol_table
* symtab
,
11256 Target_mips
<size
, big_endian
>* target
,
11257 Sized_relobj_file
<size
, big_endian
>* object
,
11258 unsigned int data_shndx
,
11259 Output_section
* output_section
,
11260 const Reltype
& reloc
,
11261 unsigned int r_type
,
11271 (const Relatype
*) NULL
,
11278 // Return whether a R_MIPS_32/R_MIPS64 relocation needs to be applied.
11279 // In cases where Scan::local() or Scan::global() has created
11280 // a dynamic relocation, the addend of the relocation is carried
11281 // in the data, and we must not apply the static relocation.
11283 template<int size
, bool big_endian
>
11285 Target_mips
<size
, big_endian
>::Relocate::should_apply_static_reloc(
11286 const Mips_symbol
<size
>* gsym
,
11287 unsigned int r_type
,
11288 Output_section
* output_section
,
11289 Target_mips
* target
)
11291 // If the output section is not allocated, then we didn't call
11292 // scan_relocs, we didn't create a dynamic reloc, and we must apply
11294 if ((output_section
->flags() & elfcpp::SHF_ALLOC
) == 0)
11301 // For global symbols, we use the same helper routines used in the
11303 if (gsym
->needs_dynamic_reloc(Scan::get_reference_flags(r_type
))
11304 && !gsym
->may_need_copy_reloc())
11306 // We have generated dynamic reloc (R_MIPS_REL32).
11308 bool multi_got
= false;
11309 if (target
->has_got_section())
11310 multi_got
= target
->got_section()->multi_got();
11311 bool has_got_offset
;
11313 has_got_offset
= gsym
->has_got_offset(GOT_TYPE_STANDARD
);
11315 has_got_offset
= gsym
->global_gotoffset() != -1U;
11316 if (!has_got_offset
)
11319 // Apply the relocation only if the symbol is in the local got.
11320 // Do not apply the relocation if the symbol is in the global
11322 return symbol_references_local(gsym
, gsym
->has_dynsym_index());
11325 // We have not generated dynamic reloc.
11330 // Perform a relocation.
11332 template<int size
, bool big_endian
>
11334 Target_mips
<size
, big_endian
>::Relocate::relocate(
11335 const Relocate_info
<size
, big_endian
>* relinfo
,
11336 unsigned int rel_type
,
11337 Target_mips
* target
,
11338 Output_section
* output_section
,
11340 const unsigned char* preloc
,
11341 const Sized_symbol
<size
>* gsym
,
11342 const Symbol_value
<size
>* psymval
,
11343 unsigned char* view
,
11344 Mips_address address
,
11347 Mips_address r_offset
;
11348 unsigned int r_sym
;
11349 unsigned int r_type
;
11350 unsigned int r_type2
;
11351 unsigned int r_type3
;
11352 unsigned char r_ssym
;
11353 typename
elfcpp::Elf_types
<size
>::Elf_Swxword r_addend
;
11355 if (rel_type
== elfcpp::SHT_RELA
)
11357 const Relatype
rela(preloc
);
11358 r_offset
= rela
.get_r_offset();
11359 r_sym
= Mips_classify_reloc
<elfcpp::SHT_RELA
, size
, big_endian
>::
11361 r_type
= Mips_classify_reloc
<elfcpp::SHT_RELA
, size
, big_endian
>::
11363 r_type2
= Mips_classify_reloc
<elfcpp::SHT_RELA
, size
, big_endian
>::
11364 get_r_type2(&rela
);
11365 r_type3
= Mips_classify_reloc
<elfcpp::SHT_RELA
, size
, big_endian
>::
11366 get_r_type3(&rela
);
11367 r_ssym
= Mips_classify_reloc
<elfcpp::SHT_RELA
, size
, big_endian
>::
11369 r_addend
= rela
.get_r_addend();
11373 const Reltype
rel(preloc
);
11374 r_offset
= rel
.get_r_offset();
11375 r_sym
= Mips_classify_reloc
<elfcpp::SHT_REL
, size
, big_endian
>::
11377 r_type
= Mips_classify_reloc
<elfcpp::SHT_REL
, size
, big_endian
>::
11385 typedef Mips_relocate_functions
<size
, big_endian
> Reloc_funcs
;
11386 typename
Reloc_funcs::Status reloc_status
= Reloc_funcs::STATUS_OKAY
;
11388 Mips_relobj
<size
, big_endian
>* object
=
11389 Mips_relobj
<size
, big_endian
>::as_mips_relobj(relinfo
->object
);
11391 bool target_is_16_bit_code
= false;
11392 bool target_is_micromips_code
= false;
11393 bool cross_mode_jump
;
11395 Symbol_value
<size
> symval
;
11397 const Mips_symbol
<size
>* mips_sym
= Mips_symbol
<size
>::as_mips_sym(gsym
);
11399 bool changed_symbol_value
= false;
11402 target_is_16_bit_code
= object
->local_symbol_is_mips16(r_sym
);
11403 target_is_micromips_code
= object
->local_symbol_is_micromips(r_sym
);
11404 if (target_is_16_bit_code
|| target_is_micromips_code
)
11406 // MIPS16/microMIPS text labels should be treated as odd.
11407 symval
.set_output_value(psymval
->value(object
, 1));
11409 changed_symbol_value
= true;
11414 target_is_16_bit_code
= mips_sym
->is_mips16();
11415 target_is_micromips_code
= mips_sym
->is_micromips();
11417 // If this is a mips16/microMIPS text symbol, add 1 to the value to make
11418 // it odd. This will cause something like .word SYM to come up with
11419 // the right value when it is loaded into the PC.
11421 if ((mips_sym
->is_mips16() || mips_sym
->is_micromips())
11422 && psymval
->value(object
, 0) != 0)
11424 symval
.set_output_value(psymval
->value(object
, 0) | 1);
11426 changed_symbol_value
= true;
11429 // Pick the value to use for symbols defined in shared objects.
11430 if (mips_sym
->use_plt_offset(Scan::get_reference_flags(r_type
))
11431 || mips_sym
->has_lazy_stub())
11433 Mips_address value
;
11434 if (!mips_sym
->has_lazy_stub())
11436 // Prefer a standard MIPS PLT entry.
11437 if (mips_sym
->has_mips_plt_offset())
11439 value
= target
->plt_section()->mips_entry_address(mips_sym
);
11440 target_is_micromips_code
= false;
11441 target_is_16_bit_code
= false;
11445 value
= (target
->plt_section()->comp_entry_address(mips_sym
)
11447 if (target
->is_output_micromips())
11448 target_is_micromips_code
= true;
11450 target_is_16_bit_code
= true;
11454 value
= target
->mips_stubs_section()->stub_address(mips_sym
);
11456 symval
.set_output_value(value
);
11461 // TRUE if the symbol referred to by this relocation is "_gp_disp".
11462 // Note that such a symbol must always be a global symbol.
11463 bool gp_disp
= (gsym
!= NULL
&& (strcmp(gsym
->name(), "_gp_disp") == 0)
11464 && !object
->is_newabi());
11466 // TRUE if the symbol referred to by this relocation is "__gnu_local_gp".
11467 // Note that such a symbol must always be a global symbol.
11468 bool gnu_local_gp
= gsym
&& (strcmp(gsym
->name(), "__gnu_local_gp") == 0);
11473 if (!hi16_reloc(r_type
) && !lo16_reloc(r_type
))
11474 gold_error_at_location(relinfo
, relnum
, r_offset
,
11475 _("relocations against _gp_disp are permitted only"
11476 " with R_MIPS_HI16 and R_MIPS_LO16 relocations."));
11478 else if (gnu_local_gp
)
11480 // __gnu_local_gp is _gp symbol.
11481 symval
.set_output_value(target
->adjusted_gp_value(object
));
11485 // If this is a reference to a 16-bit function with a stub, we need
11486 // to redirect the relocation to the stub unless:
11488 // (a) the relocation is for a MIPS16 JAL;
11490 // (b) the relocation is for a MIPS16 PIC call, and there are no
11491 // non-MIPS16 uses of the GOT slot; or
11493 // (c) the section allows direct references to MIPS16 functions.
11494 if (r_type
!= elfcpp::R_MIPS16_26
11495 && !parameters
->options().relocatable()
11496 && ((mips_sym
!= NULL
11497 && mips_sym
->has_mips16_fn_stub()
11498 && (r_type
!= elfcpp::R_MIPS16_CALL16
|| mips_sym
->need_fn_stub()))
11499 || (mips_sym
== NULL
11500 && object
->get_local_mips16_fn_stub(r_sym
) != NULL
))
11501 && !object
->section_allows_mips16_refs(relinfo
->data_shndx
))
11503 // This is a 32- or 64-bit call to a 16-bit function. We should
11504 // have already noticed that we were going to need the
11506 Mips_address value
;
11507 if (mips_sym
== NULL
)
11508 value
= object
->get_local_mips16_fn_stub(r_sym
)->output_address();
11511 gold_assert(mips_sym
->need_fn_stub());
11512 if (mips_sym
->has_la25_stub())
11513 value
= target
->la25_stub_section()->stub_address(mips_sym
);
11516 value
= mips_sym
->template
11517 get_mips16_fn_stub
<big_endian
>()->output_address();
11520 symval
.set_output_value(value
);
11522 changed_symbol_value
= true;
11524 // The target is 16-bit, but the stub isn't.
11525 target_is_16_bit_code
= false;
11527 // If this is a MIPS16 call with a stub, that is made through the PLT or
11528 // to a standard MIPS function, we need to redirect the call to the stub.
11529 // Note that we specifically exclude R_MIPS16_CALL16 from this behavior;
11530 // indirect calls should use an indirect stub instead.
11531 else if (r_type
== elfcpp::R_MIPS16_26
&& !parameters
->options().relocatable()
11532 && ((mips_sym
!= NULL
11533 && (mips_sym
->has_mips16_call_stub()
11534 || mips_sym
->has_mips16_call_fp_stub()))
11535 || (mips_sym
== NULL
11536 && object
->get_local_mips16_call_stub(r_sym
) != NULL
))
11537 && ((mips_sym
!= NULL
&& mips_sym
->has_plt_offset())
11538 || !target_is_16_bit_code
))
11540 Mips16_stub_section
<size
, big_endian
>* call_stub
;
11541 if (mips_sym
== NULL
)
11542 call_stub
= object
->get_local_mips16_call_stub(r_sym
);
11545 // If both call_stub and call_fp_stub are defined, we can figure
11546 // out which one to use by checking which one appears in the input
11548 if (mips_sym
->has_mips16_call_stub()
11549 && mips_sym
->has_mips16_call_fp_stub())
11552 for (unsigned int i
= 1; i
< object
->shnum(); ++i
)
11554 if (object
->is_mips16_call_fp_stub_section(i
))
11556 call_stub
= mips_sym
->template
11557 get_mips16_call_fp_stub
<big_endian
>();
11562 if (call_stub
== NULL
)
11564 mips_sym
->template get_mips16_call_stub
<big_endian
>();
11566 else if (mips_sym
->has_mips16_call_stub())
11567 call_stub
= mips_sym
->template get_mips16_call_stub
<big_endian
>();
11569 call_stub
= mips_sym
->template get_mips16_call_fp_stub
<big_endian
>();
11572 symval
.set_output_value(call_stub
->output_address());
11574 changed_symbol_value
= true;
11576 // If this is a direct call to a PIC function, redirect to the
11578 else if (mips_sym
!= NULL
11579 && mips_sym
->has_la25_stub()
11580 && relocation_needs_la25_stub
<size
, big_endian
>(
11581 object
, r_type
, target_is_16_bit_code
))
11583 Mips_address value
= target
->la25_stub_section()->stub_address(mips_sym
);
11584 if (mips_sym
->is_micromips())
11586 symval
.set_output_value(value
);
11589 // For direct MIPS16 and microMIPS calls make sure the compressed PLT
11590 // entry is used if a standard PLT entry has also been made.
11591 else if ((r_type
== elfcpp::R_MIPS16_26
11592 || r_type
== elfcpp::R_MICROMIPS_26_S1
)
11593 && !parameters
->options().relocatable()
11594 && mips_sym
!= NULL
11595 && mips_sym
->has_plt_offset()
11596 && mips_sym
->has_comp_plt_offset()
11597 && mips_sym
->has_mips_plt_offset())
11599 Mips_address value
= (target
->plt_section()->comp_entry_address(mips_sym
)
11601 symval
.set_output_value(value
);
11604 target_is_16_bit_code
= !target
->is_output_micromips();
11605 target_is_micromips_code
= target
->is_output_micromips();
11608 // Make sure MIPS16 and microMIPS are not used together.
11609 if ((r_type
== elfcpp::R_MIPS16_26
&& target_is_micromips_code
)
11610 || (micromips_branch_reloc(r_type
) && target_is_16_bit_code
))
11612 gold_error(_("MIPS16 and microMIPS functions cannot call each other"));
11615 // Calls from 16-bit code to 32-bit code and vice versa require the
11616 // mode change. However, we can ignore calls to undefined weak symbols,
11617 // which should never be executed at runtime. This exception is important
11618 // because the assembly writer may have "known" that any definition of the
11619 // symbol would be 16-bit code, and that direct jumps were therefore
11622 (!parameters
->options().relocatable()
11623 && !(gsym
!= NULL
&& gsym
->is_weak_undefined())
11624 && ((r_type
== elfcpp::R_MIPS16_26
&& !target_is_16_bit_code
)
11625 || (r_type
== elfcpp::R_MICROMIPS_26_S1
&& !target_is_micromips_code
)
11626 || ((r_type
== elfcpp::R_MIPS_26
|| r_type
== elfcpp::R_MIPS_JALR
)
11627 && (target_is_16_bit_code
|| target_is_micromips_code
))));
11629 bool local
= (mips_sym
== NULL
11630 || (mips_sym
->got_only_for_calls()
11631 ? symbol_calls_local(mips_sym
, mips_sym
->has_dynsym_index())
11632 : symbol_references_local(mips_sym
,
11633 mips_sym
->has_dynsym_index())));
11635 // Global R_MIPS_GOT_PAGE/R_MICROMIPS_GOT_PAGE relocations are equivalent
11636 // to R_MIPS_GOT_DISP/R_MICROMIPS_GOT_DISP. The addend is applied by the
11637 // corresponding R_MIPS_GOT_OFST/R_MICROMIPS_GOT_OFST.
11638 if (got_page_reloc(r_type
) && !local
)
11639 r_type
= (micromips_reloc(r_type
) ? elfcpp::R_MICROMIPS_GOT_DISP
11640 : elfcpp::R_MIPS_GOT_DISP
);
11642 unsigned int got_offset
= 0;
11645 bool calculate_only
= false;
11646 Valtype calculated_value
= 0;
11647 bool extract_addend
= rel_type
== elfcpp::SHT_REL
;
11648 unsigned int r_types
[3] = { r_type
, r_type2
, r_type3
};
11650 Reloc_funcs::mips_reloc_unshuffle(view
, r_type
, false);
11652 // For Mips64 N64 ABI, there may be up to three operations specified per
11653 // record, by the fields r_type, r_type2, and r_type3. The first operation
11654 // takes its addend from the relocation record. Each subsequent operation
11655 // takes as its addend the result of the previous operation.
11656 // The first operation in a record which references a symbol uses the symbol
11657 // implied by r_sym. The next operation in a record which references a symbol
11658 // uses the special symbol value given by the r_ssym field. A third operation
11659 // in a record which references a symbol will assume a NULL symbol,
11660 // i.e. value zero.
11663 // Check if a record references to a symbol.
11664 for (unsigned int i
= 0; i
< 3; ++i
)
11666 if (r_types
[i
] == elfcpp::R_MIPS_NONE
)
11670 // Check if the next relocation is for the same instruction.
11671 calculate_only
= i
== 2 ? false
11672 : r_types
[i
+1] != elfcpp::R_MIPS_NONE
;
11674 if (object
->is_n64())
11678 // Handle special symbol for r_type2 relocation type.
11682 symval
.set_output_value(0);
11685 symval
.set_output_value(target
->gp_value());
11688 symval
.set_output_value(object
->gp_value());
11691 symval
.set_output_value(address
);
11694 gold_unreachable();
11700 // For r_type3 symbol value is 0.
11701 symval
.set_output_value(0);
11705 bool update_got_entry
= false;
11706 switch (r_types
[i
])
11708 case elfcpp::R_MIPS_NONE
:
11710 case elfcpp::R_MIPS_16
:
11711 reloc_status
= Reloc_funcs::rel16(view
, object
, psymval
, r_addend
,
11712 extract_addend
, calculate_only
,
11713 &calculated_value
);
11716 case elfcpp::R_MIPS_32
:
11717 if (should_apply_static_reloc(mips_sym
, r_types
[i
], output_section
,
11719 reloc_status
= Reloc_funcs::rel32(view
, object
, psymval
, r_addend
,
11720 extract_addend
, calculate_only
,
11721 &calculated_value
);
11722 if (mips_sym
!= NULL
11723 && (mips_sym
->is_mips16() || mips_sym
->is_micromips())
11724 && mips_sym
->global_got_area() == GGA_RELOC_ONLY
)
11726 // If mips_sym->has_mips16_fn_stub() is false, symbol value is
11727 // already updated by adding +1.
11728 if (mips_sym
->has_mips16_fn_stub())
11730 gold_assert(mips_sym
->need_fn_stub());
11731 Mips16_stub_section
<size
, big_endian
>* fn_stub
=
11732 mips_sym
->template get_mips16_fn_stub
<big_endian
>();
11734 symval
.set_output_value(fn_stub
->output_address());
11737 got_offset
= mips_sym
->global_gotoffset();
11738 update_got_entry
= true;
11742 case elfcpp::R_MIPS_64
:
11743 if (should_apply_static_reloc(mips_sym
, r_types
[i
], output_section
,
11745 reloc_status
= Reloc_funcs::rel64(view
, object
, psymval
, r_addend
,
11746 extract_addend
, calculate_only
,
11747 &calculated_value
, false);
11748 else if (target
->is_output_n64() && r_addend
!= 0)
11749 // Only apply the addend. The static relocation was RELA, but the
11750 // dynamic relocation is REL, so we need to apply the addend.
11751 reloc_status
= Reloc_funcs::rel64(view
, object
, psymval
, r_addend
,
11752 extract_addend
, calculate_only
,
11753 &calculated_value
, true);
11755 case elfcpp::R_MIPS_REL32
:
11756 gold_unreachable();
11758 case elfcpp::R_MIPS_PC32
:
11759 reloc_status
= Reloc_funcs::relpc32(view
, object
, psymval
, address
,
11760 r_addend
, extract_addend
,
11762 &calculated_value
);
11765 case elfcpp::R_MIPS16_26
:
11766 // The calculation for R_MIPS16_26 is just the same as for an
11767 // R_MIPS_26. It's only the storage of the relocated field into
11768 // the output file that's different. So, we just fall through to the
11769 // R_MIPS_26 case here.
11770 case elfcpp::R_MIPS_26
:
11771 case elfcpp::R_MICROMIPS_26_S1
:
11772 reloc_status
= Reloc_funcs::rel26(view
, object
, psymval
, address
,
11773 gsym
== NULL
, r_addend
, extract_addend
, gsym
, cross_mode_jump
,
11774 r_types
[i
], target
->jal_to_bal(), calculate_only
,
11775 &calculated_value
);
11778 case elfcpp::R_MIPS_HI16
:
11779 case elfcpp::R_MIPS16_HI16
:
11780 case elfcpp::R_MICROMIPS_HI16
:
11781 if (rel_type
== elfcpp::SHT_RELA
)
11782 reloc_status
= Reloc_funcs::do_relhi16(view
, object
, psymval
,
11784 gp_disp
, r_types
[i
],
11786 target
, calculate_only
,
11787 &calculated_value
);
11788 else if (rel_type
== elfcpp::SHT_REL
)
11789 reloc_status
= Reloc_funcs::relhi16(view
, object
, psymval
, r_addend
,
11790 address
, gp_disp
, r_types
[i
],
11791 r_sym
, extract_addend
);
11793 gold_unreachable();
11796 case elfcpp::R_MIPS_LO16
:
11797 case elfcpp::R_MIPS16_LO16
:
11798 case elfcpp::R_MICROMIPS_LO16
:
11799 case elfcpp::R_MICROMIPS_HI0_LO16
:
11800 reloc_status
= Reloc_funcs::rello16(target
, view
, object
, psymval
,
11801 r_addend
, extract_addend
, address
,
11802 gp_disp
, r_types
[i
], r_sym
,
11803 rel_type
, calculate_only
,
11804 &calculated_value
);
11807 case elfcpp::R_MIPS_LITERAL
:
11808 case elfcpp::R_MICROMIPS_LITERAL
:
11809 // Because we don't merge literal sections, we can handle this
11810 // just like R_MIPS_GPREL16. In the long run, we should merge
11811 // shared literals, and then we will need to additional work
11816 case elfcpp::R_MIPS_GPREL16
:
11817 case elfcpp::R_MIPS16_GPREL
:
11818 case elfcpp::R_MICROMIPS_GPREL7_S2
:
11819 case elfcpp::R_MICROMIPS_GPREL16
:
11820 reloc_status
= Reloc_funcs::relgprel(view
, object
, psymval
,
11821 target
->adjusted_gp_value(object
),
11822 r_addend
, extract_addend
,
11823 gsym
== NULL
, r_types
[i
],
11824 calculate_only
, &calculated_value
);
11827 case elfcpp::R_MIPS_PC16
:
11828 reloc_status
= Reloc_funcs::relpc16(view
, object
, psymval
, address
,
11829 r_addend
, extract_addend
,
11831 &calculated_value
);
11834 case elfcpp::R_MIPS_PC21_S2
:
11835 reloc_status
= Reloc_funcs::relpc21(view
, object
, psymval
, address
,
11836 r_addend
, extract_addend
,
11838 &calculated_value
);
11841 case elfcpp::R_MIPS_PC26_S2
:
11842 reloc_status
= Reloc_funcs::relpc26(view
, object
, psymval
, address
,
11843 r_addend
, extract_addend
,
11845 &calculated_value
);
11848 case elfcpp::R_MIPS_PC18_S3
:
11849 reloc_status
= Reloc_funcs::relpc18(view
, object
, psymval
, address
,
11850 r_addend
, extract_addend
,
11852 &calculated_value
);
11855 case elfcpp::R_MIPS_PC19_S2
:
11856 reloc_status
= Reloc_funcs::relpc19(view
, object
, psymval
, address
,
11857 r_addend
, extract_addend
,
11859 &calculated_value
);
11862 case elfcpp::R_MIPS_PCHI16
:
11863 if (rel_type
== elfcpp::SHT_RELA
)
11864 reloc_status
= Reloc_funcs::do_relpchi16(view
, object
, psymval
,
11868 &calculated_value
);
11869 else if (rel_type
== elfcpp::SHT_REL
)
11870 reloc_status
= Reloc_funcs::relpchi16(view
, object
, psymval
,
11871 r_addend
, address
, r_sym
,
11874 gold_unreachable();
11877 case elfcpp::R_MIPS_PCLO16
:
11878 reloc_status
= Reloc_funcs::relpclo16(view
, object
, psymval
, r_addend
,
11879 extract_addend
, address
, r_sym
,
11880 rel_type
, calculate_only
,
11881 &calculated_value
);
11883 case elfcpp::R_MICROMIPS_PC7_S1
:
11884 reloc_status
= Reloc_funcs::relmicromips_pc7_s1(view
, object
, psymval
,
11888 &calculated_value
);
11890 case elfcpp::R_MICROMIPS_PC10_S1
:
11891 reloc_status
= Reloc_funcs::relmicromips_pc10_s1(view
, object
,
11893 r_addend
, extract_addend
,
11895 &calculated_value
);
11897 case elfcpp::R_MICROMIPS_PC16_S1
:
11898 reloc_status
= Reloc_funcs::relmicromips_pc16_s1(view
, object
,
11900 r_addend
, extract_addend
,
11902 &calculated_value
);
11904 case elfcpp::R_MIPS_GPREL32
:
11905 reloc_status
= Reloc_funcs::relgprel32(view
, object
, psymval
,
11906 target
->adjusted_gp_value(object
),
11907 r_addend
, extract_addend
,
11909 &calculated_value
);
11911 case elfcpp::R_MIPS_GOT_HI16
:
11912 case elfcpp::R_MIPS_CALL_HI16
:
11913 case elfcpp::R_MICROMIPS_GOT_HI16
:
11914 case elfcpp::R_MICROMIPS_CALL_HI16
:
11916 got_offset
= target
->got_section()->got_offset(gsym
,
11920 got_offset
= target
->got_section()->got_offset(r_sym
,
11923 gp_offset
= target
->got_section()->gp_offset(got_offset
, object
);
11924 reloc_status
= Reloc_funcs::relgot_hi16(view
, gp_offset
,
11926 &calculated_value
);
11927 update_got_entry
= changed_symbol_value
;
11930 case elfcpp::R_MIPS_GOT_LO16
:
11931 case elfcpp::R_MIPS_CALL_LO16
:
11932 case elfcpp::R_MICROMIPS_GOT_LO16
:
11933 case elfcpp::R_MICROMIPS_CALL_LO16
:
11935 got_offset
= target
->got_section()->got_offset(gsym
,
11939 got_offset
= target
->got_section()->got_offset(r_sym
,
11942 gp_offset
= target
->got_section()->gp_offset(got_offset
, object
);
11943 reloc_status
= Reloc_funcs::relgot_lo16(view
, gp_offset
,
11945 &calculated_value
);
11946 update_got_entry
= changed_symbol_value
;
11949 case elfcpp::R_MIPS_GOT_DISP
:
11950 case elfcpp::R_MICROMIPS_GOT_DISP
:
11951 case elfcpp::R_MIPS_EH
:
11953 got_offset
= target
->got_section()->got_offset(gsym
,
11957 got_offset
= target
->got_section()->got_offset(r_sym
,
11960 gp_offset
= target
->got_section()->gp_offset(got_offset
, object
);
11961 if (eh_reloc(r_types
[i
]))
11962 reloc_status
= Reloc_funcs::releh(view
, gp_offset
,
11964 &calculated_value
);
11966 reloc_status
= Reloc_funcs::relgot(view
, gp_offset
,
11968 &calculated_value
);
11970 case elfcpp::R_MIPS_CALL16
:
11971 case elfcpp::R_MIPS16_CALL16
:
11972 case elfcpp::R_MICROMIPS_CALL16
:
11973 gold_assert(gsym
!= NULL
);
11974 got_offset
= target
->got_section()->got_offset(gsym
,
11977 gp_offset
= target
->got_section()->gp_offset(got_offset
, object
);
11978 reloc_status
= Reloc_funcs::relgot(view
, gp_offset
,
11979 calculate_only
, &calculated_value
);
11980 // TODO(sasa): We should also initialize update_got_entry
11981 // in other place swhere relgot is called.
11982 update_got_entry
= changed_symbol_value
;
11985 case elfcpp::R_MIPS_GOT16
:
11986 case elfcpp::R_MIPS16_GOT16
:
11987 case elfcpp::R_MICROMIPS_GOT16
:
11990 got_offset
= target
->got_section()->got_offset(gsym
,
11993 gp_offset
= target
->got_section()->gp_offset(got_offset
, object
);
11994 reloc_status
= Reloc_funcs::relgot(view
, gp_offset
,
11996 &calculated_value
);
12000 if (rel_type
== elfcpp::SHT_RELA
)
12001 reloc_status
= Reloc_funcs::do_relgot16_local(view
, object
,
12006 &calculated_value
);
12007 else if (rel_type
== elfcpp::SHT_REL
)
12008 reloc_status
= Reloc_funcs::relgot16_local(view
, object
,
12011 r_types
[i
], r_sym
);
12013 gold_unreachable();
12015 update_got_entry
= changed_symbol_value
;
12018 case elfcpp::R_MIPS_TLS_GD
:
12019 case elfcpp::R_MIPS16_TLS_GD
:
12020 case elfcpp::R_MICROMIPS_TLS_GD
:
12022 got_offset
= target
->got_section()->got_offset(gsym
,
12026 got_offset
= target
->got_section()->got_offset(r_sym
,
12029 gp_offset
= target
->got_section()->gp_offset(got_offset
, object
);
12030 reloc_status
= Reloc_funcs::relgot(view
, gp_offset
, calculate_only
,
12031 &calculated_value
);
12034 case elfcpp::R_MIPS_TLS_GOTTPREL
:
12035 case elfcpp::R_MIPS16_TLS_GOTTPREL
:
12036 case elfcpp::R_MICROMIPS_TLS_GOTTPREL
:
12038 got_offset
= target
->got_section()->got_offset(gsym
,
12039 GOT_TYPE_TLS_OFFSET
,
12042 got_offset
= target
->got_section()->got_offset(r_sym
,
12043 GOT_TYPE_TLS_OFFSET
,
12045 gp_offset
= target
->got_section()->gp_offset(got_offset
, object
);
12046 reloc_status
= Reloc_funcs::relgot(view
, gp_offset
, calculate_only
,
12047 &calculated_value
);
12050 case elfcpp::R_MIPS_TLS_LDM
:
12051 case elfcpp::R_MIPS16_TLS_LDM
:
12052 case elfcpp::R_MICROMIPS_TLS_LDM
:
12053 // Relocate the field with the offset of the GOT entry for
12054 // the module index.
12055 got_offset
= target
->got_section()->tls_ldm_offset(object
);
12056 gp_offset
= target
->got_section()->gp_offset(got_offset
, object
);
12057 reloc_status
= Reloc_funcs::relgot(view
, gp_offset
, calculate_only
,
12058 &calculated_value
);
12061 case elfcpp::R_MIPS_GOT_PAGE
:
12062 case elfcpp::R_MICROMIPS_GOT_PAGE
:
12063 reloc_status
= Reloc_funcs::relgotpage(target
, view
, object
, psymval
,
12064 r_addend
, extract_addend
,
12066 &calculated_value
);
12069 case elfcpp::R_MIPS_GOT_OFST
:
12070 case elfcpp::R_MICROMIPS_GOT_OFST
:
12071 reloc_status
= Reloc_funcs::relgotofst(target
, view
, object
, psymval
,
12072 r_addend
, extract_addend
,
12073 local
, calculate_only
,
12074 &calculated_value
);
12077 case elfcpp::R_MIPS_JALR
:
12078 case elfcpp::R_MICROMIPS_JALR
:
12079 // This relocation is only a hint. In some cases, we optimize
12080 // it into a bal instruction. But we don't try to optimize
12081 // when the symbol does not resolve locally.
12083 || symbol_calls_local(gsym
, gsym
->has_dynsym_index()))
12084 reloc_status
= Reloc_funcs::reljalr(view
, object
, psymval
, address
,
12085 r_addend
, extract_addend
,
12086 cross_mode_jump
, r_types
[i
],
12087 target
->jalr_to_bal(),
12090 &calculated_value
);
12093 case elfcpp::R_MIPS_TLS_DTPREL_HI16
:
12094 case elfcpp::R_MIPS16_TLS_DTPREL_HI16
:
12095 case elfcpp::R_MICROMIPS_TLS_DTPREL_HI16
:
12096 reloc_status
= Reloc_funcs::tlsrelhi16(view
, object
, psymval
,
12097 elfcpp::DTP_OFFSET
, r_addend
,
12098 extract_addend
, calculate_only
,
12099 &calculated_value
);
12101 case elfcpp::R_MIPS_TLS_DTPREL_LO16
:
12102 case elfcpp::R_MIPS16_TLS_DTPREL_LO16
:
12103 case elfcpp::R_MICROMIPS_TLS_DTPREL_LO16
:
12104 reloc_status
= Reloc_funcs::tlsrello16(view
, object
, psymval
,
12105 elfcpp::DTP_OFFSET
, r_addend
,
12106 extract_addend
, calculate_only
,
12107 &calculated_value
);
12109 case elfcpp::R_MIPS_TLS_DTPREL32
:
12110 case elfcpp::R_MIPS_TLS_DTPREL64
:
12111 reloc_status
= Reloc_funcs::tlsrel32(view
, object
, psymval
,
12112 elfcpp::DTP_OFFSET
, r_addend
,
12113 extract_addend
, calculate_only
,
12114 &calculated_value
);
12116 case elfcpp::R_MIPS_TLS_TPREL_HI16
:
12117 case elfcpp::R_MIPS16_TLS_TPREL_HI16
:
12118 case elfcpp::R_MICROMIPS_TLS_TPREL_HI16
:
12119 reloc_status
= Reloc_funcs::tlsrelhi16(view
, object
, psymval
,
12120 elfcpp::TP_OFFSET
, r_addend
,
12121 extract_addend
, calculate_only
,
12122 &calculated_value
);
12124 case elfcpp::R_MIPS_TLS_TPREL_LO16
:
12125 case elfcpp::R_MIPS16_TLS_TPREL_LO16
:
12126 case elfcpp::R_MICROMIPS_TLS_TPREL_LO16
:
12127 reloc_status
= Reloc_funcs::tlsrello16(view
, object
, psymval
,
12128 elfcpp::TP_OFFSET
, r_addend
,
12129 extract_addend
, calculate_only
,
12130 &calculated_value
);
12132 case elfcpp::R_MIPS_TLS_TPREL32
:
12133 case elfcpp::R_MIPS_TLS_TPREL64
:
12134 reloc_status
= Reloc_funcs::tlsrel32(view
, object
, psymval
,
12135 elfcpp::TP_OFFSET
, r_addend
,
12136 extract_addend
, calculate_only
,
12137 &calculated_value
);
12139 case elfcpp::R_MIPS_SUB
:
12140 case elfcpp::R_MICROMIPS_SUB
:
12141 reloc_status
= Reloc_funcs::relsub(view
, object
, psymval
, r_addend
,
12143 calculate_only
, &calculated_value
);
12145 case elfcpp::R_MIPS_HIGHER
:
12146 case elfcpp::R_MICROMIPS_HIGHER
:
12147 reloc_status
= Reloc_funcs::relhigher(view
, object
, psymval
, r_addend
,
12148 extract_addend
, calculate_only
,
12149 &calculated_value
);
12151 case elfcpp::R_MIPS_HIGHEST
:
12152 case elfcpp::R_MICROMIPS_HIGHEST
:
12153 reloc_status
= Reloc_funcs::relhighest(view
, object
, psymval
,
12154 r_addend
, extract_addend
,
12156 &calculated_value
);
12159 gold_error_at_location(relinfo
, relnum
, r_offset
,
12160 _("unsupported reloc %u"), r_types
[i
]);
12164 if (update_got_entry
)
12166 Mips_output_data_got
<size
, big_endian
>* got
= target
->got_section();
12167 if (mips_sym
!= NULL
&& mips_sym
->get_applied_secondary_got_fixup())
12168 got
->update_got_entry(got
->get_primary_got_offset(mips_sym
),
12169 psymval
->value(object
, 0));
12171 got
->update_got_entry(got_offset
, psymval
->value(object
, 0));
12174 r_addend
= calculated_value
;
12177 bool jal_shuffle
= jal_reloc(r_type
) ? !parameters
->options().relocatable()
12179 Reloc_funcs::mips_reloc_shuffle(view
, r_type
, jal_shuffle
);
12181 // Report any errors.
12182 switch (reloc_status
)
12184 case Reloc_funcs::STATUS_OKAY
:
12186 case Reloc_funcs::STATUS_OVERFLOW
:
12188 gold_error_at_location(relinfo
, relnum
, r_offset
,
12189 _("relocation overflow: "
12190 "%u against local symbol %u in %s"),
12191 r_type
, r_sym
, object
->name().c_str());
12192 else if (gsym
->is_defined() && gsym
->source() == Symbol::FROM_OBJECT
)
12193 gold_error_at_location(relinfo
, relnum
, r_offset
,
12194 _("relocation overflow: "
12195 "%u against '%s' defined in %s"),
12196 r_type
, gsym
->demangled_name().c_str(),
12197 gsym
->object()->name().c_str());
12199 gold_error_at_location(relinfo
, relnum
, r_offset
,
12200 _("relocation overflow: %u against '%s'"),
12201 r_type
, gsym
->demangled_name().c_str());
12203 case Reloc_funcs::STATUS_BAD_RELOC
:
12204 gold_error_at_location(relinfo
, relnum
, r_offset
,
12205 _("unexpected opcode while processing relocation"));
12207 case Reloc_funcs::STATUS_PCREL_UNALIGNED
:
12208 gold_error_at_location(relinfo
, relnum
, r_offset
,
12209 _("unaligned PC-relative relocation"));
12212 gold_unreachable();
12218 // Get the Reference_flags for a particular relocation.
12220 template<int size
, bool big_endian
>
12222 Target_mips
<size
, big_endian
>::Scan::get_reference_flags(
12223 unsigned int r_type
)
12227 case elfcpp::R_MIPS_NONE
:
12228 // No symbol reference.
12231 case elfcpp::R_MIPS_16
:
12232 case elfcpp::R_MIPS_32
:
12233 case elfcpp::R_MIPS_64
:
12234 case elfcpp::R_MIPS_HI16
:
12235 case elfcpp::R_MIPS_LO16
:
12236 case elfcpp::R_MIPS_HIGHER
:
12237 case elfcpp::R_MIPS_HIGHEST
:
12238 case elfcpp::R_MIPS16_HI16
:
12239 case elfcpp::R_MIPS16_LO16
:
12240 case elfcpp::R_MICROMIPS_HI16
:
12241 case elfcpp::R_MICROMIPS_LO16
:
12242 case elfcpp::R_MICROMIPS_HIGHER
:
12243 case elfcpp::R_MICROMIPS_HIGHEST
:
12244 return Symbol::ABSOLUTE_REF
;
12246 case elfcpp::R_MIPS_26
:
12247 case elfcpp::R_MIPS16_26
:
12248 case elfcpp::R_MICROMIPS_26_S1
:
12249 return Symbol::FUNCTION_CALL
| Symbol::ABSOLUTE_REF
;
12251 case elfcpp::R_MIPS_PC18_S3
:
12252 case elfcpp::R_MIPS_PC19_S2
:
12253 case elfcpp::R_MIPS_PCHI16
:
12254 case elfcpp::R_MIPS_PCLO16
:
12255 case elfcpp::R_MIPS_GPREL32
:
12256 case elfcpp::R_MIPS_GPREL16
:
12257 case elfcpp::R_MIPS_REL32
:
12258 case elfcpp::R_MIPS16_GPREL
:
12259 return Symbol::RELATIVE_REF
;
12261 case elfcpp::R_MIPS_PC16
:
12262 case elfcpp::R_MIPS_PC32
:
12263 case elfcpp::R_MIPS_PC21_S2
:
12264 case elfcpp::R_MIPS_PC26_S2
:
12265 case elfcpp::R_MIPS_JALR
:
12266 case elfcpp::R_MICROMIPS_JALR
:
12267 return Symbol::FUNCTION_CALL
| Symbol::RELATIVE_REF
;
12269 case elfcpp::R_MIPS_GOT16
:
12270 case elfcpp::R_MIPS_CALL16
:
12271 case elfcpp::R_MIPS_GOT_DISP
:
12272 case elfcpp::R_MIPS_GOT_HI16
:
12273 case elfcpp::R_MIPS_GOT_LO16
:
12274 case elfcpp::R_MIPS_CALL_HI16
:
12275 case elfcpp::R_MIPS_CALL_LO16
:
12276 case elfcpp::R_MIPS_LITERAL
:
12277 case elfcpp::R_MIPS_GOT_PAGE
:
12278 case elfcpp::R_MIPS_GOT_OFST
:
12279 case elfcpp::R_MIPS16_GOT16
:
12280 case elfcpp::R_MIPS16_CALL16
:
12281 case elfcpp::R_MICROMIPS_GOT16
:
12282 case elfcpp::R_MICROMIPS_CALL16
:
12283 case elfcpp::R_MICROMIPS_GOT_HI16
:
12284 case elfcpp::R_MICROMIPS_GOT_LO16
:
12285 case elfcpp::R_MICROMIPS_CALL_HI16
:
12286 case elfcpp::R_MICROMIPS_CALL_LO16
:
12287 case elfcpp::R_MIPS_EH
:
12288 // Absolute in GOT.
12289 return Symbol::RELATIVE_REF
;
12291 case elfcpp::R_MIPS_TLS_DTPMOD32
:
12292 case elfcpp::R_MIPS_TLS_DTPREL32
:
12293 case elfcpp::R_MIPS_TLS_DTPMOD64
:
12294 case elfcpp::R_MIPS_TLS_DTPREL64
:
12295 case elfcpp::R_MIPS_TLS_GD
:
12296 case elfcpp::R_MIPS_TLS_LDM
:
12297 case elfcpp::R_MIPS_TLS_DTPREL_HI16
:
12298 case elfcpp::R_MIPS_TLS_DTPREL_LO16
:
12299 case elfcpp::R_MIPS_TLS_GOTTPREL
:
12300 case elfcpp::R_MIPS_TLS_TPREL32
:
12301 case elfcpp::R_MIPS_TLS_TPREL64
:
12302 case elfcpp::R_MIPS_TLS_TPREL_HI16
:
12303 case elfcpp::R_MIPS_TLS_TPREL_LO16
:
12304 case elfcpp::R_MIPS16_TLS_GD
:
12305 case elfcpp::R_MIPS16_TLS_GOTTPREL
:
12306 case elfcpp::R_MICROMIPS_TLS_GD
:
12307 case elfcpp::R_MICROMIPS_TLS_GOTTPREL
:
12308 case elfcpp::R_MICROMIPS_TLS_TPREL_HI16
:
12309 case elfcpp::R_MICROMIPS_TLS_TPREL_LO16
:
12310 return Symbol::TLS_REF
;
12312 case elfcpp::R_MIPS_COPY
:
12313 case elfcpp::R_MIPS_JUMP_SLOT
:
12315 // Not expected. We will give an error later.
12320 // Report an unsupported relocation against a local symbol.
12322 template<int size
, bool big_endian
>
12324 Target_mips
<size
, big_endian
>::Scan::unsupported_reloc_local(
12325 Sized_relobj_file
<size
, big_endian
>* object
,
12326 unsigned int r_type
)
12328 gold_error(_("%s: unsupported reloc %u against local symbol"),
12329 object
->name().c_str(), r_type
);
12332 // Report an unsupported relocation against a global symbol.
12334 template<int size
, bool big_endian
>
12336 Target_mips
<size
, big_endian
>::Scan::unsupported_reloc_global(
12337 Sized_relobj_file
<size
, big_endian
>* object
,
12338 unsigned int r_type
,
12341 gold_error(_("%s: unsupported reloc %u against global symbol %s"),
12342 object
->name().c_str(), r_type
, gsym
->demangled_name().c_str());
12345 // Return printable name for ABI.
12346 template<int size
, bool big_endian
>
12348 Target_mips
<size
, big_endian
>::elf_mips_abi_name(elfcpp::Elf_Word e_flags
)
12350 switch (e_flags
& elfcpp::EF_MIPS_ABI
)
12353 if ((e_flags
& elfcpp::EF_MIPS_ABI2
) != 0)
12355 else if (size
== 64)
12359 case elfcpp::E_MIPS_ABI_O32
:
12361 case elfcpp::E_MIPS_ABI_O64
:
12363 case elfcpp::E_MIPS_ABI_EABI32
:
12365 case elfcpp::E_MIPS_ABI_EABI64
:
12368 return "unknown abi";
12372 template<int size
, bool big_endian
>
12374 Target_mips
<size
, big_endian
>::elf_mips_mach_name(elfcpp::Elf_Word e_flags
)
12376 switch (e_flags
& elfcpp::EF_MIPS_MACH
)
12378 case elfcpp::E_MIPS_MACH_3900
:
12379 return "mips:3900";
12380 case elfcpp::E_MIPS_MACH_4010
:
12381 return "mips:4010";
12382 case elfcpp::E_MIPS_MACH_4100
:
12383 return "mips:4100";
12384 case elfcpp::E_MIPS_MACH_4111
:
12385 return "mips:4111";
12386 case elfcpp::E_MIPS_MACH_4120
:
12387 return "mips:4120";
12388 case elfcpp::E_MIPS_MACH_4650
:
12389 return "mips:4650";
12390 case elfcpp::E_MIPS_MACH_5400
:
12391 return "mips:5400";
12392 case elfcpp::E_MIPS_MACH_5500
:
12393 return "mips:5500";
12394 case elfcpp::E_MIPS_MACH_5900
:
12395 return "mips:5900";
12396 case elfcpp::E_MIPS_MACH_SB1
:
12398 case elfcpp::E_MIPS_MACH_9000
:
12399 return "mips:9000";
12400 case elfcpp::E_MIPS_MACH_LS2E
:
12401 return "mips:loongson_2e";
12402 case elfcpp::E_MIPS_MACH_LS2F
:
12403 return "mips:loongson_2f";
12404 case elfcpp::E_MIPS_MACH_LS3A
:
12405 return "mips:loongson_3a";
12406 case elfcpp::E_MIPS_MACH_OCTEON
:
12407 return "mips:octeon";
12408 case elfcpp::E_MIPS_MACH_OCTEON2
:
12409 return "mips:octeon2";
12410 case elfcpp::E_MIPS_MACH_OCTEON3
:
12411 return "mips:octeon3";
12412 case elfcpp::E_MIPS_MACH_XLR
:
12415 switch (e_flags
& elfcpp::EF_MIPS_ARCH
)
12418 case elfcpp::E_MIPS_ARCH_1
:
12419 return "mips:3000";
12421 case elfcpp::E_MIPS_ARCH_2
:
12422 return "mips:6000";
12424 case elfcpp::E_MIPS_ARCH_3
:
12425 return "mips:4000";
12427 case elfcpp::E_MIPS_ARCH_4
:
12428 return "mips:8000";
12430 case elfcpp::E_MIPS_ARCH_5
:
12431 return "mips:mips5";
12433 case elfcpp::E_MIPS_ARCH_32
:
12434 return "mips:isa32";
12436 case elfcpp::E_MIPS_ARCH_64
:
12437 return "mips:isa64";
12439 case elfcpp::E_MIPS_ARCH_32R2
:
12440 return "mips:isa32r2";
12442 case elfcpp::E_MIPS_ARCH_32R6
:
12443 return "mips:isa32r6";
12445 case elfcpp::E_MIPS_ARCH_64R2
:
12446 return "mips:isa64r2";
12448 case elfcpp::E_MIPS_ARCH_64R6
:
12449 return "mips:isa64r6";
12452 return "unknown CPU";
12455 template<int size
, bool big_endian
>
12456 const Target::Target_info Target_mips
<size
, big_endian
>::mips_info
=
12459 big_endian
, // is_big_endian
12460 elfcpp::EM_MIPS
, // machine_code
12461 true, // has_make_symbol
12462 false, // has_resolve
12463 false, // has_code_fill
12464 true, // is_default_stack_executable
12465 false, // can_icf_inline_merge_sections
12467 size
== 32 ? "/lib/ld.so.1" : "/lib64/ld.so.1", // dynamic_linker
12468 0x400000, // default_text_segment_address
12469 64 * 1024, // abi_pagesize (overridable by -z max-page-size)
12470 4 * 1024, // common_pagesize (overridable by -z common-page-size)
12471 false, // isolate_execinstr
12472 0, // rosegment_gap
12473 elfcpp::SHN_UNDEF
, // small_common_shndx
12474 elfcpp::SHN_UNDEF
, // large_common_shndx
12475 0, // small_common_section_flags
12476 0, // large_common_section_flags
12477 NULL
, // attributes_section
12478 NULL
, // attributes_vendor
12479 "__start", // entry_symbol_name
12480 32, // hash_entry_size
12483 template<int size
, bool big_endian
>
12484 class Target_mips_nacl
: public Target_mips
<size
, big_endian
>
12488 : Target_mips
<size
, big_endian
>(&mips_nacl_info
)
12492 static const Target::Target_info mips_nacl_info
;
12495 template<int size
, bool big_endian
>
12496 const Target::Target_info Target_mips_nacl
<size
, big_endian
>::mips_nacl_info
=
12499 big_endian
, // is_big_endian
12500 elfcpp::EM_MIPS
, // machine_code
12501 true, // has_make_symbol
12502 false, // has_resolve
12503 false, // has_code_fill
12504 true, // is_default_stack_executable
12505 false, // can_icf_inline_merge_sections
12507 "/lib/ld.so.1", // dynamic_linker
12508 0x20000, // default_text_segment_address
12509 0x10000, // abi_pagesize (overridable by -z max-page-size)
12510 0x10000, // common_pagesize (overridable by -z common-page-size)
12511 true, // isolate_execinstr
12512 0x10000000, // rosegment_gap
12513 elfcpp::SHN_UNDEF
, // small_common_shndx
12514 elfcpp::SHN_UNDEF
, // large_common_shndx
12515 0, // small_common_section_flags
12516 0, // large_common_section_flags
12517 NULL
, // attributes_section
12518 NULL
, // attributes_vendor
12519 "_start", // entry_symbol_name
12520 32, // hash_entry_size
12523 // Target selector for Mips. Note this is never instantiated directly.
12524 // It's only used in Target_selector_mips_nacl, below.
12526 template<int size
, bool big_endian
>
12527 class Target_selector_mips
: public Target_selector
12530 Target_selector_mips()
12531 : Target_selector(elfcpp::EM_MIPS
, size
, big_endian
,
12533 (big_endian
? "elf64-tradbigmips" : "elf64-tradlittlemips") :
12534 (big_endian
? "elf32-tradbigmips" : "elf32-tradlittlemips")),
12536 (big_endian
? "elf64btsmip" : "elf64ltsmip") :
12537 (big_endian
? "elf32btsmip" : "elf32ltsmip")))
12540 Target
* do_instantiate_target()
12541 { return new Target_mips
<size
, big_endian
>(); }
12544 template<int size
, bool big_endian
>
12545 class Target_selector_mips_nacl
12546 : public Target_selector_nacl
<Target_selector_mips
<size
, big_endian
>,
12547 Target_mips_nacl
<size
, big_endian
> >
12550 Target_selector_mips_nacl()
12551 : Target_selector_nacl
<Target_selector_mips
<size
, big_endian
>,
12552 Target_mips_nacl
<size
, big_endian
> >(
12553 // NaCl currently supports only MIPS32 little-endian.
12554 "mipsel", "elf32-tradlittlemips-nacl", "elf32-tradlittlemips-nacl")
12558 Target_selector_mips_nacl
<32, true> target_selector_mips32
;
12559 Target_selector_mips_nacl
<32, false> target_selector_mips32el
;
12560 Target_selector_mips_nacl
<64, true> target_selector_mips64
;
12561 Target_selector_mips_nacl
<64, false> target_selector_mips64el
;
12563 } // End anonymous namespace.