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())
4596 if ((x
>> 26) != ((address
+ 4) >> (26 + shift
)))
4598 gold_error(_("relocation truncated to fit: %u against '%s'"),
4599 r_type
, gsym
->name());
4600 return This::STATUS_OVERFLOW
;
4604 val
= Bits
<32>::bit_select32(val
, x
, 0x03ffffff);
4606 // If required, turn JAL into JALX.
4607 if (cross_mode_jump
)
4610 Valtype32 opcode
= val
>> 26;
4611 Valtype32 jalx_opcode
;
4613 // Check to see if the opcode is already JAL or JALX.
4614 if (r_type
== elfcpp::R_MIPS16_26
)
4616 ok
= (opcode
== 0x6) || (opcode
== 0x7);
4619 else if (r_type
== elfcpp::R_MICROMIPS_26_S1
)
4621 ok
= (opcode
== 0x3d) || (opcode
== 0x3c);
4626 ok
= (opcode
== 0x3) || (opcode
== 0x1d);
4630 // If the opcode is not JAL or JALX, there's a problem. We cannot
4631 // convert J or JALS to JALX.
4632 if (!calculate_only
&& !ok
)
4634 gold_error(_("Unsupported jump between ISA modes; consider "
4635 "recompiling with interlinking enabled."));
4636 return This::STATUS_BAD_RELOC
;
4639 // Make this the JALX opcode.
4640 val
= (val
& ~(0x3f << 26)) | (jalx_opcode
<< 26);
4643 // Try converting JAL to BAL, if the target is in range.
4644 if (!parameters
->options().relocatable()
4647 && r_type
== elfcpp::R_MIPS_26
4648 && (val
>> 26) == 0x3))) // jal addr
4650 Valtype32 dest
= (x
<< 2) | (((address
+ 4) >> 28) << 28);
4651 int offset
= dest
- (address
+ 4);
4652 if (!Bits
<18>::has_overflow32(offset
))
4654 if (val
== 0x03200008) // jr t9
4655 val
= 0x10000000 | (((Valtype32
)offset
>> 2) & 0xffff); // b addr
4657 val
= 0x04110000 | (((Valtype32
)offset
>> 2) & 0xffff); //bal addr
4662 *calculated_value
= val
;
4664 elfcpp::Swap
<32, big_endian
>::writeval(wv
, val
);
4666 return This::STATUS_OKAY
;
4670 static inline typename
This::Status
4671 relpc16(unsigned char* view
, const Mips_relobj
<size
, big_endian
>* object
,
4672 const Symbol_value
<size
>* psymval
, Mips_address address
,
4673 Mips_address addend_a
, bool extract_addend
, bool calculate_only
,
4674 Valtype
* calculated_value
)
4676 Valtype32
* wv
= reinterpret_cast<Valtype32
*>(view
);
4677 Valtype32 val
= elfcpp::Swap
<32, big_endian
>::readval(wv
);
4679 Valtype addend
= (extract_addend
4680 ? Bits
<18>::sign_extend32((val
& 0xffff) << 2)
4683 Valtype x
= psymval
->value(object
, addend
) - address
;
4684 val
= Bits
<16>::bit_select32(val
, x
>> 2, 0xffff);
4688 *calculated_value
= x
>> 2;
4689 return This::STATUS_OKAY
;
4692 elfcpp::Swap
<32, big_endian
>::writeval(wv
, val
);
4694 if (psymval
->value(object
, addend
) & 3)
4695 return This::STATUS_PCREL_UNALIGNED
;
4697 return check_overflow
<18>(x
);
4701 static inline typename
This::Status
4702 relpc21(unsigned char* view
, const Mips_relobj
<size
, big_endian
>* object
,
4703 const Symbol_value
<size
>* psymval
, Mips_address address
,
4704 Mips_address addend_a
, bool extract_addend
, bool calculate_only
,
4705 Valtype
* calculated_value
)
4707 Valtype32
* wv
= reinterpret_cast<Valtype32
*>(view
);
4708 Valtype32 val
= elfcpp::Swap
<32, big_endian
>::readval(wv
);
4710 Valtype addend
= (extract_addend
4711 ? Bits
<23>::sign_extend32((val
& 0x1fffff) << 2)
4714 Valtype x
= psymval
->value(object
, addend
) - address
;
4715 val
= Bits
<21>::bit_select32(val
, x
>> 2, 0x1fffff);
4719 *calculated_value
= x
>> 2;
4720 return This::STATUS_OKAY
;
4723 elfcpp::Swap
<32, big_endian
>::writeval(wv
, val
);
4725 if (psymval
->value(object
, addend
) & 3)
4726 return This::STATUS_PCREL_UNALIGNED
;
4728 return check_overflow
<23>(x
);
4732 static inline typename
This::Status
4733 relpc26(unsigned char* view
, const Mips_relobj
<size
, big_endian
>* object
,
4734 const Symbol_value
<size
>* psymval
, Mips_address address
,
4735 Mips_address addend_a
, bool extract_addend
, bool calculate_only
,
4736 Valtype
* calculated_value
)
4738 Valtype32
* wv
= reinterpret_cast<Valtype32
*>(view
);
4739 Valtype32 val
= elfcpp::Swap
<32, big_endian
>::readval(wv
);
4741 Valtype addend
= (extract_addend
4742 ? Bits
<28>::sign_extend32((val
& 0x3ffffff) << 2)
4745 Valtype x
= psymval
->value(object
, addend
) - address
;
4746 val
= Bits
<26>::bit_select32(val
, x
>> 2, 0x3ffffff);
4750 *calculated_value
= x
>> 2;
4751 return This::STATUS_OKAY
;
4754 elfcpp::Swap
<32, big_endian
>::writeval(wv
, val
);
4756 if (psymval
->value(object
, addend
) & 3)
4757 return This::STATUS_PCREL_UNALIGNED
;
4759 return check_overflow
<28>(x
);
4763 static inline typename
This::Status
4764 relpc18(unsigned char* view
, const Mips_relobj
<size
, big_endian
>* object
,
4765 const Symbol_value
<size
>* psymval
, Mips_address address
,
4766 Mips_address addend_a
, bool extract_addend
, bool calculate_only
,
4767 Valtype
* calculated_value
)
4769 Valtype32
* wv
= reinterpret_cast<Valtype32
*>(view
);
4770 Valtype32 val
= elfcpp::Swap
<32, big_endian
>::readval(wv
);
4772 Valtype addend
= (extract_addend
4773 ? Bits
<21>::sign_extend32((val
& 0x3ffff) << 3)
4776 Valtype x
= psymval
->value(object
, addend
) - ((address
| 7) ^ 7);
4777 val
= Bits
<18>::bit_select32(val
, x
>> 3, 0x3ffff);
4781 *calculated_value
= x
>> 3;
4782 return This::STATUS_OKAY
;
4785 elfcpp::Swap
<32, big_endian
>::writeval(wv
, val
);
4787 if (psymval
->value(object
, addend
) & 7)
4788 return This::STATUS_PCREL_UNALIGNED
;
4790 return check_overflow
<21>(x
);
4794 static inline typename
This::Status
4795 relpc19(unsigned char* view
, const Mips_relobj
<size
, big_endian
>* object
,
4796 const Symbol_value
<size
>* psymval
, Mips_address address
,
4797 Mips_address addend_a
, bool extract_addend
, bool calculate_only
,
4798 Valtype
* calculated_value
)
4800 Valtype32
* wv
= reinterpret_cast<Valtype32
*>(view
);
4801 Valtype32 val
= elfcpp::Swap
<32, big_endian
>::readval(wv
);
4803 Valtype addend
= (extract_addend
4804 ? Bits
<21>::sign_extend32((val
& 0x7ffff) << 2)
4807 Valtype x
= psymval
->value(object
, addend
) - address
;
4808 val
= Bits
<19>::bit_select32(val
, x
>> 2, 0x7ffff);
4812 *calculated_value
= x
>> 2;
4813 return This::STATUS_OKAY
;
4816 elfcpp::Swap
<32, big_endian
>::writeval(wv
, val
);
4818 if (psymval
->value(object
, addend
) & 3)
4819 return This::STATUS_PCREL_UNALIGNED
;
4821 return check_overflow
<21>(x
);
4825 static inline typename
This::Status
4826 relpchi16(unsigned char* view
, const Mips_relobj
<size
, big_endian
>* object
,
4827 const Symbol_value
<size
>* psymval
, Mips_address addend
,
4828 Mips_address address
, unsigned int r_sym
, bool extract_addend
)
4830 // Record the relocation. It will be resolved when we find pclo16 part.
4831 pchi16_relocs
.push_back(reloc_high
<size
, big_endian
>(view
, object
, psymval
,
4832 addend
, 0, r_sym
, extract_addend
, address
));
4833 return This::STATUS_OKAY
;
4837 static inline typename
This::Status
4838 do_relpchi16(unsigned char* view
, const Mips_relobj
<size
, big_endian
>* object
,
4839 const Symbol_value
<size
>* psymval
, Mips_address addend_hi
,
4840 Mips_address address
, bool extract_addend
, Valtype32 addend_lo
,
4841 bool calculate_only
, Valtype
* calculated_value
)
4843 Valtype32
* wv
= reinterpret_cast<Valtype32
*>(view
);
4844 Valtype32 val
= elfcpp::Swap
<32, big_endian
>::readval(wv
);
4846 Valtype addend
= (extract_addend
? ((val
& 0xffff) << 16) + addend_lo
4849 Valtype value
= psymval
->value(object
, addend
) - address
;
4850 Valtype x
= ((value
+ 0x8000) >> 16) & 0xffff;
4851 val
= Bits
<32>::bit_select32(val
, x
, 0xffff);
4854 *calculated_value
= x
;
4856 elfcpp::Swap
<32, big_endian
>::writeval(wv
, val
);
4858 return This::STATUS_OKAY
;
4862 static inline typename
This::Status
4863 relpclo16(unsigned char* view
, const Mips_relobj
<size
, big_endian
>* object
,
4864 const Symbol_value
<size
>* psymval
, Mips_address addend_a
,
4865 bool extract_addend
, Mips_address address
, unsigned int r_sym
,
4866 unsigned int rel_type
, bool calculate_only
,
4867 Valtype
* calculated_value
)
4869 Valtype32
* wv
= reinterpret_cast<Valtype32
*>(view
);
4870 Valtype32 val
= elfcpp::Swap
<32, big_endian
>::readval(wv
);
4872 Valtype addend
= (extract_addend
? Bits
<16>::sign_extend32(val
& 0xffff)
4875 if (rel_type
== elfcpp::SHT_REL
)
4877 // Resolve pending R_MIPS_PCHI16 relocations.
4878 typename
std::list
<reloc_high
<size
, big_endian
> >::iterator it
=
4879 pchi16_relocs
.begin();
4880 while (it
!= pchi16_relocs
.end())
4882 reloc_high
<size
, big_endian
> pchi16
= *it
;
4883 if (pchi16
.r_sym
== r_sym
)
4885 do_relpchi16(pchi16
.view
, pchi16
.object
, pchi16
.psymval
,
4886 pchi16
.addend
, pchi16
.address
,
4887 pchi16
.extract_addend
, addend
, calculate_only
,
4889 it
= pchi16_relocs
.erase(it
);
4896 // Resolve R_MIPS_PCLO16 relocation.
4897 Valtype x
= psymval
->value(object
, addend
) - address
;
4898 val
= Bits
<32>::bit_select32(val
, x
, 0xffff);
4901 *calculated_value
= x
;
4903 elfcpp::Swap
<32, big_endian
>::writeval(wv
, val
);
4905 return This::STATUS_OKAY
;
4908 // R_MICROMIPS_PC7_S1
4909 static inline typename
This::Status
4910 relmicromips_pc7_s1(unsigned char* view
,
4911 const Mips_relobj
<size
, big_endian
>* object
,
4912 const Symbol_value
<size
>* psymval
, Mips_address address
,
4913 Mips_address addend_a
, bool extract_addend
,
4914 bool calculate_only
, Valtype
* calculated_value
)
4916 Valtype32
* wv
= reinterpret_cast<Valtype32
*>(view
);
4917 Valtype32 val
= elfcpp::Swap
<32, big_endian
>::readval(wv
);
4919 Valtype addend
= extract_addend
? Bits
<8>::sign_extend32((val
& 0x7f) << 1)
4922 Valtype x
= psymval
->value(object
, addend
) - address
;
4923 val
= Bits
<16>::bit_select32(val
, x
>> 1, 0x7f);
4927 *calculated_value
= x
>> 1;
4928 return This::STATUS_OKAY
;
4931 elfcpp::Swap
<32, big_endian
>::writeval(wv
, val
);
4933 return check_overflow
<8>(x
);
4936 // R_MICROMIPS_PC10_S1
4937 static inline typename
This::Status
4938 relmicromips_pc10_s1(unsigned char* view
,
4939 const Mips_relobj
<size
, big_endian
>* object
,
4940 const Symbol_value
<size
>* psymval
, Mips_address address
,
4941 Mips_address addend_a
, bool extract_addend
,
4942 bool calculate_only
, Valtype
* calculated_value
)
4944 Valtype32
* wv
= reinterpret_cast<Valtype32
*>(view
);
4945 Valtype32 val
= elfcpp::Swap
<32, big_endian
>::readval(wv
);
4947 Valtype addend
= (extract_addend
4948 ? Bits
<11>::sign_extend32((val
& 0x3ff) << 1)
4951 Valtype x
= psymval
->value(object
, addend
) - address
;
4952 val
= Bits
<16>::bit_select32(val
, x
>> 1, 0x3ff);
4956 *calculated_value
= x
>> 1;
4957 return This::STATUS_OKAY
;
4960 elfcpp::Swap
<32, big_endian
>::writeval(wv
, val
);
4962 return check_overflow
<11>(x
);
4965 // R_MICROMIPS_PC16_S1
4966 static inline typename
This::Status
4967 relmicromips_pc16_s1(unsigned char* view
,
4968 const Mips_relobj
<size
, big_endian
>* object
,
4969 const Symbol_value
<size
>* psymval
, Mips_address address
,
4970 Mips_address addend_a
, bool extract_addend
,
4971 bool calculate_only
, Valtype
* calculated_value
)
4973 Valtype32
* wv
= reinterpret_cast<Valtype32
*>(view
);
4974 Valtype32 val
= elfcpp::Swap
<32, big_endian
>::readval(wv
);
4976 Valtype addend
= (extract_addend
4977 ? Bits
<17>::sign_extend32((val
& 0xffff) << 1)
4980 Valtype x
= psymval
->value(object
, addend
) - address
;
4981 val
= Bits
<16>::bit_select32(val
, x
>> 1, 0xffff);
4985 *calculated_value
= x
>> 1;
4986 return This::STATUS_OKAY
;
4989 elfcpp::Swap
<32, big_endian
>::writeval(wv
, val
);
4991 return check_overflow
<17>(x
);
4994 // R_MIPS_HI16, R_MIPS16_HI16, R_MICROMIPS_HI16,
4995 static inline typename
This::Status
4996 relhi16(unsigned char* view
, const Mips_relobj
<size
, big_endian
>* object
,
4997 const Symbol_value
<size
>* psymval
, Mips_address addend
,
4998 Mips_address address
, bool gp_disp
, unsigned int r_type
,
4999 unsigned int r_sym
, bool extract_addend
)
5001 // Record the relocation. It will be resolved when we find lo16 part.
5002 hi16_relocs
.push_back(reloc_high
<size
, big_endian
>(view
, object
, psymval
,
5003 addend
, r_type
, r_sym
, extract_addend
, address
,
5005 return This::STATUS_OKAY
;
5008 // R_MIPS_HI16, R_MIPS16_HI16, R_MICROMIPS_HI16,
5009 static inline typename
This::Status
5010 do_relhi16(unsigned char* view
, const Mips_relobj
<size
, big_endian
>* object
,
5011 const Symbol_value
<size
>* psymval
, Mips_address addend_hi
,
5012 Mips_address address
, bool is_gp_disp
, unsigned int r_type
,
5013 bool extract_addend
, Valtype32 addend_lo
,
5014 Target_mips
<size
, big_endian
>* target
, bool calculate_only
,
5015 Valtype
* calculated_value
)
5017 Valtype32
* wv
= reinterpret_cast<Valtype32
*>(view
);
5018 Valtype32 val
= elfcpp::Swap
<32, big_endian
>::readval(wv
);
5020 Valtype addend
= (extract_addend
? ((val
& 0xffff) << 16) + addend_lo
5025 value
= psymval
->value(object
, addend
);
5028 // For MIPS16 ABI code we generate this sequence
5029 // 0: li $v0,%hi(_gp_disp)
5030 // 4: addiupc $v1,%lo(_gp_disp)
5034 // So the offsets of hi and lo relocs are the same, but the
5035 // base $pc is that used by the ADDIUPC instruction at $t9 + 4.
5036 // ADDIUPC clears the low two bits of the instruction address,
5037 // so the base is ($t9 + 4) & ~3.
5039 if (r_type
== elfcpp::R_MIPS16_HI16
)
5040 gp_disp
= (target
->adjusted_gp_value(object
)
5041 - ((address
+ 4) & ~0x3));
5042 // The microMIPS .cpload sequence uses the same assembly
5043 // instructions as the traditional psABI version, but the
5044 // incoming $t9 has the low bit set.
5045 else if (r_type
== elfcpp::R_MICROMIPS_HI16
)
5046 gp_disp
= target
->adjusted_gp_value(object
) - address
- 1;
5048 gp_disp
= target
->adjusted_gp_value(object
) - address
;
5049 value
= gp_disp
+ addend
;
5051 Valtype x
= ((value
+ 0x8000) >> 16) & 0xffff;
5052 val
= Bits
<32>::bit_select32(val
, x
, 0xffff);
5056 *calculated_value
= x
;
5057 return This::STATUS_OKAY
;
5060 elfcpp::Swap
<32, big_endian
>::writeval(wv
, val
);
5062 return (is_gp_disp
? check_overflow
<16>(x
)
5063 : This::STATUS_OKAY
);
5066 // R_MIPS_GOT16, R_MIPS16_GOT16, R_MICROMIPS_GOT16
5067 static inline typename
This::Status
5068 relgot16_local(unsigned char* view
,
5069 const Mips_relobj
<size
, big_endian
>* object
,
5070 const Symbol_value
<size
>* psymval
, Mips_address addend_a
,
5071 bool extract_addend
, unsigned int r_type
, unsigned int r_sym
)
5073 // Record the relocation. It will be resolved when we find lo16 part.
5074 got16_relocs
.push_back(reloc_high
<size
, big_endian
>(view
, object
, psymval
,
5075 addend_a
, r_type
, r_sym
, extract_addend
));
5076 return This::STATUS_OKAY
;
5079 // R_MIPS_GOT16, R_MIPS16_GOT16, R_MICROMIPS_GOT16
5080 static inline typename
This::Status
5081 do_relgot16_local(unsigned char* view
,
5082 const Mips_relobj
<size
, big_endian
>* object
,
5083 const Symbol_value
<size
>* psymval
, Mips_address addend_hi
,
5084 bool extract_addend
, Valtype32 addend_lo
,
5085 Target_mips
<size
, big_endian
>* target
, bool calculate_only
,
5086 Valtype
* calculated_value
)
5088 Valtype32
* wv
= reinterpret_cast<Valtype32
*>(view
);
5089 Valtype32 val
= elfcpp::Swap
<32, big_endian
>::readval(wv
);
5091 Valtype addend
= (extract_addend
? ((val
& 0xffff) << 16) + addend_lo
5094 // Find GOT page entry.
5095 Mips_address value
= ((psymval
->value(object
, addend
) + 0x8000) >> 16)
5098 unsigned int got_offset
=
5099 target
->got_section()->get_got_page_offset(value
, object
);
5101 // Resolve the relocation.
5102 Valtype x
= target
->got_section()->gp_offset(got_offset
, object
);
5103 val
= Bits
<32>::bit_select32(val
, x
, 0xffff);
5107 *calculated_value
= x
;
5108 return This::STATUS_OKAY
;
5111 elfcpp::Swap
<32, big_endian
>::writeval(wv
, val
);
5113 return check_overflow
<16>(x
);
5116 // R_MIPS_LO16, R_MIPS16_LO16, R_MICROMIPS_LO16, R_MICROMIPS_HI0_LO16
5117 static inline typename
This::Status
5118 rello16(Target_mips
<size
, big_endian
>* target
, unsigned char* view
,
5119 const Mips_relobj
<size
, big_endian
>* object
,
5120 const Symbol_value
<size
>* psymval
, Mips_address addend_a
,
5121 bool extract_addend
, Mips_address address
, bool is_gp_disp
,
5122 unsigned int r_type
, unsigned int r_sym
, unsigned int rel_type
,
5123 bool calculate_only
, Valtype
* calculated_value
)
5125 Valtype32
* wv
= reinterpret_cast<Valtype32
*>(view
);
5126 Valtype32 val
= elfcpp::Swap
<32, big_endian
>::readval(wv
);
5128 Valtype addend
= (extract_addend
? Bits
<16>::sign_extend32(val
& 0xffff)
5131 if (rel_type
== elfcpp::SHT_REL
)
5133 typename
This::Status reloc_status
= This::STATUS_OKAY
;
5134 // Resolve pending R_MIPS_HI16 relocations.
5135 typename
std::list
<reloc_high
<size
, big_endian
> >::iterator it
=
5136 hi16_relocs
.begin();
5137 while (it
!= hi16_relocs
.end())
5139 reloc_high
<size
, big_endian
> hi16
= *it
;
5140 if (hi16
.r_sym
== r_sym
5141 && is_matching_lo16_reloc(hi16
.r_type
, r_type
))
5143 mips_reloc_unshuffle(hi16
.view
, hi16
.r_type
, false);
5144 reloc_status
= do_relhi16(hi16
.view
, hi16
.object
, hi16
.psymval
,
5145 hi16
.addend
, hi16
.address
, hi16
.gp_disp
,
5146 hi16
.r_type
, hi16
.extract_addend
, addend
,
5147 target
, calculate_only
, calculated_value
);
5148 mips_reloc_shuffle(hi16
.view
, hi16
.r_type
, false);
5149 if (reloc_status
== This::STATUS_OVERFLOW
)
5150 return This::STATUS_OVERFLOW
;
5151 it
= hi16_relocs
.erase(it
);
5157 // Resolve pending local R_MIPS_GOT16 relocations.
5158 typename
std::list
<reloc_high
<size
, big_endian
> >::iterator it2
=
5159 got16_relocs
.begin();
5160 while (it2
!= got16_relocs
.end())
5162 reloc_high
<size
, big_endian
> got16
= *it2
;
5163 if (got16
.r_sym
== r_sym
5164 && is_matching_lo16_reloc(got16
.r_type
, r_type
))
5166 mips_reloc_unshuffle(got16
.view
, got16
.r_type
, false);
5168 reloc_status
= do_relgot16_local(got16
.view
, got16
.object
,
5169 got16
.psymval
, got16
.addend
,
5170 got16
.extract_addend
, addend
, target
,
5171 calculate_only
, calculated_value
);
5173 mips_reloc_shuffle(got16
.view
, got16
.r_type
, false);
5174 if (reloc_status
== This::STATUS_OVERFLOW
)
5175 return This::STATUS_OVERFLOW
;
5176 it2
= got16_relocs
.erase(it2
);
5183 // Resolve R_MIPS_LO16 relocation.
5186 x
= psymval
->value(object
, addend
);
5189 // See the comment for R_MIPS16_HI16 above for the reason
5190 // for this conditional.
5192 if (r_type
== elfcpp::R_MIPS16_LO16
)
5193 gp_disp
= target
->adjusted_gp_value(object
) - (address
& ~0x3);
5194 else if (r_type
== elfcpp::R_MICROMIPS_LO16
5195 || r_type
== elfcpp::R_MICROMIPS_HI0_LO16
)
5196 gp_disp
= target
->adjusted_gp_value(object
) - address
+ 3;
5198 gp_disp
= target
->adjusted_gp_value(object
) - address
+ 4;
5199 // The MIPS ABI requires checking the R_MIPS_LO16 relocation
5200 // for overflow. Relocations against _gp_disp are normally
5201 // generated from the .cpload pseudo-op. It generates code
5202 // that normally looks like this:
5204 // lui $gp,%hi(_gp_disp)
5205 // addiu $gp,$gp,%lo(_gp_disp)
5208 // Here $t9 holds the address of the function being called,
5209 // as required by the MIPS ELF ABI. The R_MIPS_LO16
5210 // relocation can easily overflow in this situation, but the
5211 // R_MIPS_HI16 relocation will handle the overflow.
5212 // Therefore, we consider this a bug in the MIPS ABI, and do
5213 // not check for overflow here.
5214 x
= gp_disp
+ addend
;
5216 val
= Bits
<32>::bit_select32(val
, x
, 0xffff);
5219 *calculated_value
= x
;
5221 elfcpp::Swap
<32, big_endian
>::writeval(wv
, val
);
5223 return This::STATUS_OKAY
;
5226 // R_MIPS_CALL16, R_MIPS16_CALL16, R_MICROMIPS_CALL16
5227 // R_MIPS_GOT16, R_MIPS16_GOT16, R_MICROMIPS_GOT16
5228 // R_MIPS_TLS_GD, R_MIPS16_TLS_GD, R_MICROMIPS_TLS_GD
5229 // R_MIPS_TLS_GOTTPREL, R_MIPS16_TLS_GOTTPREL, R_MICROMIPS_TLS_GOTTPREL
5230 // R_MIPS_TLS_LDM, R_MIPS16_TLS_LDM, R_MICROMIPS_TLS_LDM
5231 // R_MIPS_GOT_DISP, R_MICROMIPS_GOT_DISP
5232 static inline typename
This::Status
5233 relgot(unsigned char* view
, int gp_offset
, bool calculate_only
,
5234 Valtype
* calculated_value
)
5236 Valtype32
* wv
= reinterpret_cast<Valtype32
*>(view
);
5237 Valtype32 val
= elfcpp::Swap
<32, big_endian
>::readval(wv
);
5238 Valtype x
= gp_offset
;
5239 val
= Bits
<32>::bit_select32(val
, x
, 0xffff);
5243 *calculated_value
= x
;
5244 return This::STATUS_OKAY
;
5247 elfcpp::Swap
<32, big_endian
>::writeval(wv
, val
);
5249 return check_overflow
<16>(x
);
5253 static inline typename
This::Status
5254 releh(unsigned char* view
, int gp_offset
, bool calculate_only
,
5255 Valtype
* calculated_value
)
5257 Valtype32
* wv
= reinterpret_cast<Valtype32
*>(view
);
5258 Valtype x
= gp_offset
;
5262 *calculated_value
= x
;
5263 return This::STATUS_OKAY
;
5266 elfcpp::Swap
<32, big_endian
>::writeval(wv
, x
);
5268 return check_overflow
<32>(x
);
5271 // R_MIPS_GOT_PAGE, R_MICROMIPS_GOT_PAGE
5272 static inline typename
This::Status
5273 relgotpage(Target_mips
<size
, big_endian
>* target
, unsigned char* view
,
5274 const Mips_relobj
<size
, big_endian
>* object
,
5275 const Symbol_value
<size
>* psymval
, Mips_address addend_a
,
5276 bool extract_addend
, bool calculate_only
,
5277 Valtype
* calculated_value
)
5279 Valtype32
* wv
= reinterpret_cast<Valtype32
*>(view
);
5280 Valtype32 val
= elfcpp::Swap
<32, big_endian
>::readval(view
);
5281 Valtype addend
= extract_addend
? val
& 0xffff : addend_a
;
5283 // Find a GOT page entry that points to within 32KB of symbol + addend.
5284 Mips_address value
= (psymval
->value(object
, addend
) + 0x8000) & ~0xffff;
5285 unsigned int got_offset
=
5286 target
->got_section()->get_got_page_offset(value
, object
);
5288 Valtype x
= target
->got_section()->gp_offset(got_offset
, object
);
5289 val
= Bits
<32>::bit_select32(val
, x
, 0xffff);
5293 *calculated_value
= x
;
5294 return This::STATUS_OKAY
;
5297 elfcpp::Swap
<32, big_endian
>::writeval(wv
, val
);
5299 return check_overflow
<16>(x
);
5302 // R_MIPS_GOT_OFST, R_MICROMIPS_GOT_OFST
5303 static inline typename
This::Status
5304 relgotofst(Target_mips
<size
, big_endian
>* target
, unsigned char* view
,
5305 const Mips_relobj
<size
, big_endian
>* object
,
5306 const Symbol_value
<size
>* psymval
, Mips_address addend_a
,
5307 bool extract_addend
, bool local
, bool calculate_only
,
5308 Valtype
* calculated_value
)
5310 Valtype32
* wv
= reinterpret_cast<Valtype32
*>(view
);
5311 Valtype32 val
= elfcpp::Swap
<32, big_endian
>::readval(view
);
5312 Valtype addend
= extract_addend
? val
& 0xffff : addend_a
;
5314 // For a local symbol, find a GOT page entry that points to within 32KB of
5315 // symbol + addend. Relocation value is the offset of the GOT page entry's
5316 // value from symbol + addend.
5317 // For a global symbol, relocation value is addend.
5321 // Find GOT page entry.
5322 Mips_address value
= ((psymval
->value(object
, addend
) + 0x8000)
5324 target
->got_section()->get_got_page_offset(value
, object
);
5326 x
= psymval
->value(object
, addend
) - value
;
5330 val
= Bits
<32>::bit_select32(val
, x
, 0xffff);
5334 *calculated_value
= x
;
5335 return This::STATUS_OKAY
;
5338 elfcpp::Swap
<32, big_endian
>::writeval(wv
, val
);
5340 return check_overflow
<16>(x
);
5343 // R_MIPS_GOT_HI16, R_MIPS_CALL_HI16,
5344 // R_MICROMIPS_GOT_HI16, R_MICROMIPS_CALL_HI16
5345 static inline typename
This::Status
5346 relgot_hi16(unsigned char* view
, int gp_offset
, bool calculate_only
,
5347 Valtype
* calculated_value
)
5349 Valtype32
* wv
= reinterpret_cast<Valtype32
*>(view
);
5350 Valtype32 val
= elfcpp::Swap
<32, big_endian
>::readval(wv
);
5351 Valtype x
= gp_offset
;
5352 x
= ((x
+ 0x8000) >> 16) & 0xffff;
5353 val
= Bits
<32>::bit_select32(val
, x
, 0xffff);
5356 *calculated_value
= x
;
5358 elfcpp::Swap
<32, big_endian
>::writeval(wv
, val
);
5360 return This::STATUS_OKAY
;
5363 // R_MIPS_GOT_LO16, R_MIPS_CALL_LO16,
5364 // R_MICROMIPS_GOT_LO16, R_MICROMIPS_CALL_LO16
5365 static inline typename
This::Status
5366 relgot_lo16(unsigned char* view
, int gp_offset
, bool calculate_only
,
5367 Valtype
* calculated_value
)
5369 Valtype32
* wv
= reinterpret_cast<Valtype32
*>(view
);
5370 Valtype32 val
= elfcpp::Swap
<32, big_endian
>::readval(wv
);
5371 Valtype x
= gp_offset
;
5372 val
= Bits
<32>::bit_select32(val
, x
, 0xffff);
5375 *calculated_value
= x
;
5377 elfcpp::Swap
<32, big_endian
>::writeval(wv
, val
);
5379 return This::STATUS_OKAY
;
5382 // R_MIPS_GPREL16, R_MIPS16_GPREL, R_MIPS_LITERAL, R_MICROMIPS_LITERAL
5383 // R_MICROMIPS_GPREL7_S2, R_MICROMIPS_GPREL16
5384 static inline typename
This::Status
5385 relgprel(unsigned char* view
, const Mips_relobj
<size
, big_endian
>* object
,
5386 const Symbol_value
<size
>* psymval
, Mips_address gp
,
5387 Mips_address addend_a
, bool extract_addend
, bool local
,
5388 unsigned int r_type
, bool calculate_only
,
5389 Valtype
* calculated_value
)
5391 Valtype32
* wv
= reinterpret_cast<Valtype32
*>(view
);
5392 Valtype32 val
= elfcpp::Swap
<32, big_endian
>::readval(wv
);
5397 if (r_type
== elfcpp::R_MICROMIPS_GPREL7_S2
)
5398 addend
= (val
& 0x7f) << 2;
5400 addend
= val
& 0xffff;
5401 // Only sign-extend the addend if it was extracted from the
5402 // instruction. If the addend was separate, leave it alone,
5403 // otherwise we may lose significant bits.
5404 addend
= Bits
<16>::sign_extend32(addend
);
5409 Valtype x
= psymval
->value(object
, addend
) - gp
;
5411 // If the symbol was local, any earlier relocatable links will
5412 // have adjusted its addend with the gp offset, so compensate
5413 // for that now. Don't do it for symbols forced local in this
5414 // link, though, since they won't have had the gp offset applied
5417 x
+= object
->gp_value();
5419 if (r_type
== elfcpp::R_MICROMIPS_GPREL7_S2
)
5420 val
= Bits
<32>::bit_select32(val
, x
, 0x7f);
5422 val
= Bits
<32>::bit_select32(val
, x
, 0xffff);
5426 *calculated_value
= x
;
5427 return This::STATUS_OKAY
;
5430 elfcpp::Swap
<32, big_endian
>::writeval(wv
, val
);
5432 if (check_overflow
<16>(x
) == This::STATUS_OVERFLOW
)
5434 gold_error(_("small-data section exceeds 64KB; lower small-data size "
5435 "limit (see option -G)"));
5436 return This::STATUS_OVERFLOW
;
5438 return This::STATUS_OKAY
;
5442 static inline typename
This::Status
5443 relgprel32(unsigned char* view
, const Mips_relobj
<size
, big_endian
>* object
,
5444 const Symbol_value
<size
>* psymval
, Mips_address gp
,
5445 Mips_address addend_a
, bool extract_addend
, bool calculate_only
,
5446 Valtype
* calculated_value
)
5448 Valtype32
* wv
= reinterpret_cast<Valtype32
*>(view
);
5449 Valtype32 val
= elfcpp::Swap
<32, big_endian
>::readval(wv
);
5450 Valtype addend
= extract_addend
? val
: addend_a
;
5452 // R_MIPS_GPREL32 relocations are defined for local symbols only.
5453 Valtype x
= psymval
->value(object
, addend
) + object
->gp_value() - gp
;
5456 *calculated_value
= x
;
5458 elfcpp::Swap
<32, big_endian
>::writeval(wv
, x
);
5460 return This::STATUS_OKAY
;
5463 // R_MIPS_TLS_TPREL_HI16, R_MIPS16_TLS_TPREL_HI16, R_MICROMIPS_TLS_TPREL_HI16
5464 // R_MIPS_TLS_DTPREL_HI16, R_MIPS16_TLS_DTPREL_HI16,
5465 // R_MICROMIPS_TLS_DTPREL_HI16
5466 static inline typename
This::Status
5467 tlsrelhi16(unsigned char* view
, const Mips_relobj
<size
, big_endian
>* object
,
5468 const Symbol_value
<size
>* psymval
, Valtype32 tp_offset
,
5469 Mips_address addend_a
, bool extract_addend
, bool calculate_only
,
5470 Valtype
* calculated_value
)
5472 Valtype32
* wv
= reinterpret_cast<Valtype32
*>(view
);
5473 Valtype32 val
= elfcpp::Swap
<32, big_endian
>::readval(wv
);
5474 Valtype addend
= extract_addend
? val
& 0xffff : addend_a
;
5476 // tls symbol values are relative to tls_segment()->vaddr()
5477 Valtype x
= ((psymval
->value(object
, addend
) - tp_offset
) + 0x8000) >> 16;
5478 val
= Bits
<32>::bit_select32(val
, x
, 0xffff);
5481 *calculated_value
= x
;
5483 elfcpp::Swap
<32, big_endian
>::writeval(wv
, val
);
5485 return This::STATUS_OKAY
;
5488 // R_MIPS_TLS_TPREL_LO16, R_MIPS16_TLS_TPREL_LO16, R_MICROMIPS_TLS_TPREL_LO16,
5489 // R_MIPS_TLS_DTPREL_LO16, R_MIPS16_TLS_DTPREL_LO16,
5490 // R_MICROMIPS_TLS_DTPREL_LO16,
5491 static inline typename
This::Status
5492 tlsrello16(unsigned char* view
, const Mips_relobj
<size
, big_endian
>* object
,
5493 const Symbol_value
<size
>* psymval
, Valtype32 tp_offset
,
5494 Mips_address addend_a
, bool extract_addend
, bool calculate_only
,
5495 Valtype
* calculated_value
)
5497 Valtype32
* wv
= reinterpret_cast<Valtype32
*>(view
);
5498 Valtype32 val
= elfcpp::Swap
<32, big_endian
>::readval(wv
);
5499 Valtype addend
= extract_addend
? val
& 0xffff : addend_a
;
5501 // tls symbol values are relative to tls_segment()->vaddr()
5502 Valtype x
= psymval
->value(object
, addend
) - tp_offset
;
5503 val
= Bits
<32>::bit_select32(val
, x
, 0xffff);
5506 *calculated_value
= x
;
5508 elfcpp::Swap
<32, big_endian
>::writeval(wv
, val
);
5510 return This::STATUS_OKAY
;
5513 // R_MIPS_TLS_TPREL32, R_MIPS_TLS_TPREL64,
5514 // R_MIPS_TLS_DTPREL32, R_MIPS_TLS_DTPREL64
5515 static inline typename
This::Status
5516 tlsrel32(unsigned char* view
, const Mips_relobj
<size
, big_endian
>* object
,
5517 const Symbol_value
<size
>* psymval
, Valtype32 tp_offset
,
5518 Mips_address addend_a
, bool extract_addend
, bool calculate_only
,
5519 Valtype
* calculated_value
)
5521 Valtype32
* wv
= reinterpret_cast<Valtype32
*>(view
);
5522 Valtype32 val
= elfcpp::Swap
<32, big_endian
>::readval(wv
);
5523 Valtype addend
= extract_addend
? val
: addend_a
;
5525 // tls symbol values are relative to tls_segment()->vaddr()
5526 Valtype x
= psymval
->value(object
, addend
) - tp_offset
;
5529 *calculated_value
= x
;
5531 elfcpp::Swap
<32, big_endian
>::writeval(wv
, x
);
5533 return This::STATUS_OKAY
;
5536 // R_MIPS_SUB, R_MICROMIPS_SUB
5537 static inline typename
This::Status
5538 relsub(unsigned char* view
, const Mips_relobj
<size
, big_endian
>* object
,
5539 const Symbol_value
<size
>* psymval
, Mips_address addend_a
,
5540 bool extract_addend
, bool calculate_only
, Valtype
* calculated_value
)
5542 Valtype64
* wv
= reinterpret_cast<Valtype64
*>(view
);
5543 Valtype64 addend
= (extract_addend
5544 ? elfcpp::Swap
<64, big_endian
>::readval(wv
)
5547 Valtype64 x
= psymval
->value(object
, -addend
);
5549 *calculated_value
= x
;
5551 elfcpp::Swap
<64, big_endian
>::writeval(wv
, x
);
5553 return This::STATUS_OKAY
;
5557 static inline typename
This::Status
5558 rel64(unsigned char* view
, const Mips_relobj
<size
, big_endian
>* object
,
5559 const Symbol_value
<size
>* psymval
, Mips_address addend_a
,
5560 bool extract_addend
, bool calculate_only
, Valtype
* calculated_value
,
5561 bool apply_addend_only
)
5563 Valtype64
* wv
= reinterpret_cast<Valtype64
*>(view
);
5564 Valtype64 addend
= (extract_addend
5565 ? elfcpp::Swap
<64, big_endian
>::readval(wv
)
5568 Valtype64 x
= psymval
->value(object
, addend
);
5570 *calculated_value
= x
;
5573 if (apply_addend_only
)
5575 elfcpp::Swap
<64, big_endian
>::writeval(wv
, x
);
5578 return This::STATUS_OKAY
;
5581 // R_MIPS_HIGHER, R_MICROMIPS_HIGHER
5582 static inline typename
This::Status
5583 relhigher(unsigned char* view
, const Mips_relobj
<size
, big_endian
>* object
,
5584 const Symbol_value
<size
>* psymval
, Mips_address addend_a
,
5585 bool extract_addend
, bool calculate_only
, Valtype
* calculated_value
)
5587 Valtype32
* wv
= reinterpret_cast<Valtype32
*>(view
);
5588 Valtype32 val
= elfcpp::Swap
<32, big_endian
>::readval(wv
);
5589 Valtype addend
= (extract_addend
? Bits
<16>::sign_extend32(val
& 0xffff)
5592 Valtype x
= psymval
->value(object
, addend
);
5593 x
= ((x
+ (uint64_t) 0x80008000) >> 32) & 0xffff;
5594 val
= Bits
<32>::bit_select32(val
, x
, 0xffff);
5597 *calculated_value
= x
;
5599 elfcpp::Swap
<32, big_endian
>::writeval(wv
, val
);
5601 return This::STATUS_OKAY
;
5604 // R_MIPS_HIGHEST, R_MICROMIPS_HIGHEST
5605 static inline typename
This::Status
5606 relhighest(unsigned char* view
, const Mips_relobj
<size
, big_endian
>* object
,
5607 const Symbol_value
<size
>* psymval
, Mips_address addend_a
,
5608 bool extract_addend
, bool calculate_only
,
5609 Valtype
* calculated_value
)
5611 Valtype32
* wv
= reinterpret_cast<Valtype32
*>(view
);
5612 Valtype32 val
= elfcpp::Swap
<32, big_endian
>::readval(wv
);
5613 Valtype addend
= (extract_addend
? Bits
<16>::sign_extend32(val
& 0xffff)
5616 Valtype x
= psymval
->value(object
, addend
);
5617 x
= ((x
+ (uint64_t) 0x800080008000) >> 48) & 0xffff;
5618 val
= Bits
<32>::bit_select32(val
, x
, 0xffff);
5621 *calculated_value
= x
;
5623 elfcpp::Swap
<32, big_endian
>::writeval(wv
, val
);
5625 return This::STATUS_OKAY
;
5629 template<int size
, bool big_endian
>
5630 typename
std::list
<reloc_high
<size
, big_endian
> >
5631 Mips_relocate_functions
<size
, big_endian
>::hi16_relocs
;
5633 template<int size
, bool big_endian
>
5634 typename
std::list
<reloc_high
<size
, big_endian
> >
5635 Mips_relocate_functions
<size
, big_endian
>::got16_relocs
;
5637 template<int size
, bool big_endian
>
5638 typename
std::list
<reloc_high
<size
, big_endian
> >
5639 Mips_relocate_functions
<size
, big_endian
>::pchi16_relocs
;
5641 // Mips_got_info methods.
5643 // Reserve GOT entry for a GOT relocation of type R_TYPE against symbol
5644 // SYMNDX + ADDEND, where SYMNDX is a local symbol in section SHNDX in OBJECT.
5646 template<int size
, bool big_endian
>
5648 Mips_got_info
<size
, big_endian
>::record_local_got_symbol(
5649 Mips_relobj
<size
, big_endian
>* object
, unsigned int symndx
,
5650 Mips_address addend
, unsigned int r_type
, unsigned int shndx
,
5651 bool is_section_symbol
)
5653 Mips_got_entry
<size
, big_endian
>* entry
=
5654 new Mips_got_entry
<size
, big_endian
>(object
, symndx
, addend
,
5655 mips_elf_reloc_tls_type(r_type
),
5656 shndx
, is_section_symbol
);
5657 this->record_got_entry(entry
, object
);
5660 // Reserve GOT entry for a GOT relocation of type R_TYPE against MIPS_SYM,
5661 // in OBJECT. FOR_CALL is true if the caller is only interested in
5662 // using the GOT entry for calls. DYN_RELOC is true if R_TYPE is a dynamic
5665 template<int size
, bool big_endian
>
5667 Mips_got_info
<size
, big_endian
>::record_global_got_symbol(
5668 Mips_symbol
<size
>* mips_sym
, Mips_relobj
<size
, big_endian
>* object
,
5669 unsigned int r_type
, bool dyn_reloc
, bool for_call
)
5672 mips_sym
->set_got_not_only_for_calls();
5674 // A global symbol in the GOT must also be in the dynamic symbol table.
5675 if (!mips_sym
->needs_dynsym_entry() && !mips_sym
->is_forced_local())
5677 switch (mips_sym
->visibility())
5679 case elfcpp::STV_INTERNAL
:
5680 case elfcpp::STV_HIDDEN
:
5681 mips_sym
->set_is_forced_local();
5684 mips_sym
->set_needs_dynsym_entry();
5689 unsigned char tls_type
= mips_elf_reloc_tls_type(r_type
);
5690 if (tls_type
== GOT_TLS_NONE
)
5691 this->global_got_symbols_
.insert(mips_sym
);
5695 if (mips_sym
->global_got_area() == GGA_NONE
)
5696 mips_sym
->set_global_got_area(GGA_RELOC_ONLY
);
5700 Mips_got_entry
<size
, big_endian
>* entry
=
5701 new Mips_got_entry
<size
, big_endian
>(mips_sym
, tls_type
);
5703 this->record_got_entry(entry
, object
);
5706 // Add ENTRY to master GOT and to OBJECT's GOT.
5708 template<int size
, bool big_endian
>
5710 Mips_got_info
<size
, big_endian
>::record_got_entry(
5711 Mips_got_entry
<size
, big_endian
>* entry
,
5712 Mips_relobj
<size
, big_endian
>* object
)
5714 this->got_entries_
.insert(entry
);
5716 // Create the GOT entry for the OBJECT's GOT.
5717 Mips_got_info
<size
, big_endian
>* g
= object
->get_or_create_got_info();
5718 Mips_got_entry
<size
, big_endian
>* entry2
=
5719 new Mips_got_entry
<size
, big_endian
>(*entry
);
5721 g
->got_entries_
.insert(entry2
);
5724 // Record that OBJECT has a page relocation against symbol SYMNDX and
5725 // that ADDEND is the addend for that relocation.
5726 // This function creates an upper bound on the number of GOT slots
5727 // required; no attempt is made to combine references to non-overridable
5728 // global symbols across multiple input files.
5730 template<int size
, bool big_endian
>
5732 Mips_got_info
<size
, big_endian
>::record_got_page_entry(
5733 Mips_relobj
<size
, big_endian
>* object
, unsigned int symndx
, int addend
)
5735 struct Got_page_range
**range_ptr
, *range
;
5736 int old_pages
, new_pages
;
5738 // Find the Got_page_entry for this symbol.
5739 Got_page_entry
* entry
= new Got_page_entry(object
, symndx
);
5740 typename
Got_page_entry_set::iterator it
=
5741 this->got_page_entries_
.find(entry
);
5742 if (it
!= this->got_page_entries_
.end())
5745 this->got_page_entries_
.insert(entry
);
5747 // Add the same entry to the OBJECT's GOT.
5748 Got_page_entry
* entry2
= NULL
;
5749 Mips_got_info
<size
, big_endian
>* g2
= object
->get_or_create_got_info();
5750 if (g2
->got_page_entries_
.find(entry
) == g2
->got_page_entries_
.end())
5752 entry2
= new Got_page_entry(*entry
);
5753 g2
->got_page_entries_
.insert(entry2
);
5756 // Skip over ranges whose maximum extent cannot share a page entry
5758 range_ptr
= &entry
->ranges
;
5759 while (*range_ptr
&& addend
> (*range_ptr
)->max_addend
+ 0xffff)
5760 range_ptr
= &(*range_ptr
)->next
;
5762 // If we scanned to the end of the list, or found a range whose
5763 // minimum extent cannot share a page entry with ADDEND, create
5764 // a new singleton range.
5766 if (!range
|| addend
< range
->min_addend
- 0xffff)
5768 range
= new Got_page_range();
5769 range
->next
= *range_ptr
;
5770 range
->min_addend
= addend
;
5771 range
->max_addend
= addend
;
5776 ++entry2
->num_pages
;
5777 ++this->page_gotno_
;
5782 // Remember how many pages the old range contributed.
5783 old_pages
= range
->get_max_pages();
5785 // Update the ranges.
5786 if (addend
< range
->min_addend
)
5787 range
->min_addend
= addend
;
5788 else if (addend
> range
->max_addend
)
5790 if (range
->next
&& addend
>= range
->next
->min_addend
- 0xffff)
5792 old_pages
+= range
->next
->get_max_pages();
5793 range
->max_addend
= range
->next
->max_addend
;
5794 range
->next
= range
->next
->next
;
5797 range
->max_addend
= addend
;
5800 // Record any change in the total estimate.
5801 new_pages
= range
->get_max_pages();
5802 if (old_pages
!= new_pages
)
5804 entry
->num_pages
+= new_pages
- old_pages
;
5806 entry2
->num_pages
+= new_pages
- old_pages
;
5807 this->page_gotno_
+= new_pages
- old_pages
;
5808 g2
->page_gotno_
+= new_pages
- old_pages
;
5812 // Create all entries that should be in the local part of the GOT.
5814 template<int size
, bool big_endian
>
5816 Mips_got_info
<size
, big_endian
>::add_local_entries(
5817 Target_mips
<size
, big_endian
>* target
, Layout
* layout
)
5819 Mips_output_data_got
<size
, big_endian
>* got
= target
->got_section();
5820 // First two GOT entries are reserved. The first entry will be filled at
5821 // runtime. The second entry will be used by some runtime loaders.
5822 got
->add_constant(0);
5823 got
->add_constant(target
->mips_elf_gnu_got1_mask());
5825 for (typename
Got_entry_set::iterator
5826 p
= this->got_entries_
.begin();
5827 p
!= this->got_entries_
.end();
5830 Mips_got_entry
<size
, big_endian
>* entry
= *p
;
5831 if (entry
->is_for_local_symbol() && !entry
->is_tls_entry())
5833 got
->add_local(entry
->object(), entry
->symndx(),
5834 GOT_TYPE_STANDARD
, entry
->addend());
5835 unsigned int got_offset
= entry
->object()->local_got_offset(
5836 entry
->symndx(), GOT_TYPE_STANDARD
, entry
->addend());
5837 if (got
->multi_got() && this->index_
> 0
5838 && parameters
->options().output_is_position_independent())
5840 if (!entry
->is_section_symbol())
5841 target
->rel_dyn_section(layout
)->add_local(entry
->object(),
5842 entry
->symndx(), elfcpp::R_MIPS_REL32
, got
, got_offset
);
5844 target
->rel_dyn_section(layout
)->add_symbolless_local_addend(
5845 entry
->object(), entry
->symndx(), elfcpp::R_MIPS_REL32
,
5851 this->add_page_entries(target
, layout
);
5853 // Add global entries that should be in the local area.
5854 for (typename
Got_entry_set::iterator
5855 p
= this->got_entries_
.begin();
5856 p
!= this->got_entries_
.end();
5859 Mips_got_entry
<size
, big_endian
>* entry
= *p
;
5860 if (!entry
->is_for_global_symbol())
5863 Mips_symbol
<size
>* mips_sym
= entry
->sym();
5864 if (mips_sym
->global_got_area() == GGA_NONE
&& !entry
->is_tls_entry())
5866 unsigned int got_type
;
5867 if (!got
->multi_got())
5868 got_type
= GOT_TYPE_STANDARD
;
5870 got_type
= GOT_TYPE_STANDARD_MULTIGOT
+ this->index_
;
5871 if (got
->add_global(mips_sym
, got_type
))
5873 mips_sym
->set_global_gotoffset(mips_sym
->got_offset(got_type
));
5874 if (got
->multi_got() && this->index_
> 0
5875 && parameters
->options().output_is_position_independent())
5876 target
->rel_dyn_section(layout
)->add_symbolless_global_addend(
5877 mips_sym
, elfcpp::R_MIPS_REL32
, got
,
5878 mips_sym
->got_offset(got_type
));
5884 // Create GOT page entries.
5886 template<int size
, bool big_endian
>
5888 Mips_got_info
<size
, big_endian
>::add_page_entries(
5889 Target_mips
<size
, big_endian
>* target
, Layout
* layout
)
5891 if (this->page_gotno_
== 0)
5894 Mips_output_data_got
<size
, big_endian
>* got
= target
->got_section();
5895 this->got_page_offset_start_
= got
->add_constant(0);
5896 if (got
->multi_got() && this->index_
> 0
5897 && parameters
->options().output_is_position_independent())
5898 target
->rel_dyn_section(layout
)->add_absolute(elfcpp::R_MIPS_REL32
, got
,
5899 this->got_page_offset_start_
);
5900 int num_entries
= this->page_gotno_
;
5901 unsigned int prev_offset
= this->got_page_offset_start_
;
5902 while (--num_entries
> 0)
5904 unsigned int next_offset
= got
->add_constant(0);
5905 if (got
->multi_got() && this->index_
> 0
5906 && parameters
->options().output_is_position_independent())
5907 target
->rel_dyn_section(layout
)->add_absolute(elfcpp::R_MIPS_REL32
, got
,
5909 gold_assert(next_offset
== prev_offset
+ size
/8);
5910 prev_offset
= next_offset
;
5912 this->got_page_offset_next_
= this->got_page_offset_start_
;
5915 // Create global GOT entries, both GGA_NORMAL and GGA_RELOC_ONLY.
5917 template<int size
, bool big_endian
>
5919 Mips_got_info
<size
, big_endian
>::add_global_entries(
5920 Target_mips
<size
, big_endian
>* target
, Layout
* layout
,
5921 unsigned int non_reloc_only_global_gotno
)
5923 Mips_output_data_got
<size
, big_endian
>* got
= target
->got_section();
5924 // Add GGA_NORMAL entries.
5925 unsigned int count
= 0;
5926 for (typename
Got_entry_set::iterator
5927 p
= this->got_entries_
.begin();
5928 p
!= this->got_entries_
.end();
5931 Mips_got_entry
<size
, big_endian
>* entry
= *p
;
5932 if (!entry
->is_for_global_symbol())
5935 Mips_symbol
<size
>* mips_sym
= entry
->sym();
5936 if (mips_sym
->global_got_area() != GGA_NORMAL
)
5939 unsigned int got_type
;
5940 if (!got
->multi_got())
5941 got_type
= GOT_TYPE_STANDARD
;
5943 // In multi-GOT links, global symbol can be in both primary and
5944 // secondary GOT(s). By creating custom GOT type
5945 // (GOT_TYPE_STANDARD_MULTIGOT + got_index) we ensure that symbol
5946 // is added to secondary GOT(s).
5947 got_type
= GOT_TYPE_STANDARD_MULTIGOT
+ this->index_
;
5948 if (!got
->add_global(mips_sym
, got_type
))
5951 mips_sym
->set_global_gotoffset(mips_sym
->got_offset(got_type
));
5952 if (got
->multi_got() && this->index_
== 0)
5954 if (got
->multi_got() && this->index_
> 0)
5956 if (parameters
->options().output_is_position_independent()
5957 || (!parameters
->doing_static_link()
5958 && mips_sym
->is_from_dynobj() && !mips_sym
->is_undefined()))
5960 target
->rel_dyn_section(layout
)->add_global(
5961 mips_sym
, elfcpp::R_MIPS_REL32
, got
,
5962 mips_sym
->got_offset(got_type
));
5963 got
->add_secondary_got_reloc(mips_sym
->got_offset(got_type
),
5964 elfcpp::R_MIPS_REL32
, mips_sym
);
5969 if (!got
->multi_got() || this->index_
== 0)
5971 if (got
->multi_got())
5973 // We need to allocate space in the primary GOT for GGA_NORMAL entries
5974 // of secondary GOTs, to ensure that GOT offsets of GGA_RELOC_ONLY
5975 // entries correspond to dynamic symbol indexes.
5976 while (count
< non_reloc_only_global_gotno
)
5978 got
->add_constant(0);
5983 // Add GGA_RELOC_ONLY entries.
5984 got
->add_reloc_only_entries();
5988 // Create global GOT entries that should be in the GGA_RELOC_ONLY area.
5990 template<int size
, bool big_endian
>
5992 Mips_got_info
<size
, big_endian
>::add_reloc_only_entries(
5993 Mips_output_data_got
<size
, big_endian
>* got
)
5995 for (typename
Global_got_entry_set::iterator
5996 p
= this->global_got_symbols_
.begin();
5997 p
!= this->global_got_symbols_
.end();
6000 Mips_symbol
<size
>* mips_sym
= *p
;
6001 if (mips_sym
->global_got_area() == GGA_RELOC_ONLY
)
6003 unsigned int got_type
;
6004 if (!got
->multi_got())
6005 got_type
= GOT_TYPE_STANDARD
;
6007 got_type
= GOT_TYPE_STANDARD_MULTIGOT
;
6008 if (got
->add_global(mips_sym
, got_type
))
6009 mips_sym
->set_global_gotoffset(mips_sym
->got_offset(got_type
));
6014 // Create TLS GOT entries.
6016 template<int size
, bool big_endian
>
6018 Mips_got_info
<size
, big_endian
>::add_tls_entries(
6019 Target_mips
<size
, big_endian
>* target
, Layout
* layout
)
6021 Mips_output_data_got
<size
, big_endian
>* got
= target
->got_section();
6022 // Add local tls entries.
6023 for (typename
Got_entry_set::iterator
6024 p
= this->got_entries_
.begin();
6025 p
!= this->got_entries_
.end();
6028 Mips_got_entry
<size
, big_endian
>* entry
= *p
;
6029 if (!entry
->is_tls_entry() || !entry
->is_for_local_symbol())
6032 if (entry
->tls_type() == GOT_TLS_GD
)
6034 unsigned int got_type
= GOT_TYPE_TLS_PAIR
;
6035 unsigned int r_type1
= (size
== 32 ? elfcpp::R_MIPS_TLS_DTPMOD32
6036 : elfcpp::R_MIPS_TLS_DTPMOD64
);
6037 unsigned int r_type2
= (size
== 32 ? elfcpp::R_MIPS_TLS_DTPREL32
6038 : elfcpp::R_MIPS_TLS_DTPREL64
);
6040 if (!parameters
->doing_static_link())
6042 got
->add_local_pair_with_rel(entry
->object(), entry
->symndx(),
6043 entry
->shndx(), got_type
,
6044 target
->rel_dyn_section(layout
),
6045 r_type1
, entry
->addend());
6046 unsigned int got_offset
=
6047 entry
->object()->local_got_offset(entry
->symndx(), got_type
,
6049 got
->add_static_reloc(got_offset
+ size
/8, r_type2
,
6050 entry
->object(), entry
->symndx());
6054 // We are doing a static link. Mark it as belong to module 1,
6056 unsigned int got_offset
= got
->add_constant(1);
6057 entry
->object()->set_local_got_offset(entry
->symndx(), got_type
,
6060 got
->add_constant(0);
6061 got
->add_static_reloc(got_offset
+ size
/8, r_type2
,
6062 entry
->object(), entry
->symndx());
6065 else if (entry
->tls_type() == GOT_TLS_IE
)
6067 unsigned int got_type
= GOT_TYPE_TLS_OFFSET
;
6068 unsigned int r_type
= (size
== 32 ? elfcpp::R_MIPS_TLS_TPREL32
6069 : elfcpp::R_MIPS_TLS_TPREL64
);
6070 if (!parameters
->doing_static_link())
6071 got
->add_local_with_rel(entry
->object(), entry
->symndx(), got_type
,
6072 target
->rel_dyn_section(layout
), r_type
,
6076 got
->add_local(entry
->object(), entry
->symndx(), got_type
,
6078 unsigned int got_offset
=
6079 entry
->object()->local_got_offset(entry
->symndx(), got_type
,
6081 got
->add_static_reloc(got_offset
, r_type
, entry
->object(),
6085 else if (entry
->tls_type() == GOT_TLS_LDM
)
6087 unsigned int r_type
= (size
== 32 ? elfcpp::R_MIPS_TLS_DTPMOD32
6088 : elfcpp::R_MIPS_TLS_DTPMOD64
);
6089 unsigned int got_offset
;
6090 if (!parameters
->doing_static_link())
6092 got_offset
= got
->add_constant(0);
6093 target
->rel_dyn_section(layout
)->add_local(
6094 entry
->object(), 0, r_type
, got
, got_offset
);
6097 // We are doing a static link. Just mark it as belong to module 1,
6099 got_offset
= got
->add_constant(1);
6101 got
->add_constant(0);
6102 got
->set_tls_ldm_offset(got_offset
, entry
->object());
6108 // Add global tls entries.
6109 for (typename
Got_entry_set::iterator
6110 p
= this->got_entries_
.begin();
6111 p
!= this->got_entries_
.end();
6114 Mips_got_entry
<size
, big_endian
>* entry
= *p
;
6115 if (!entry
->is_tls_entry() || !entry
->is_for_global_symbol())
6118 Mips_symbol
<size
>* mips_sym
= entry
->sym();
6119 if (entry
->tls_type() == GOT_TLS_GD
)
6121 unsigned int got_type
;
6122 if (!got
->multi_got())
6123 got_type
= GOT_TYPE_TLS_PAIR
;
6125 got_type
= GOT_TYPE_TLS_PAIR_MULTIGOT
+ this->index_
;
6126 unsigned int r_type1
= (size
== 32 ? elfcpp::R_MIPS_TLS_DTPMOD32
6127 : elfcpp::R_MIPS_TLS_DTPMOD64
);
6128 unsigned int r_type2
= (size
== 32 ? elfcpp::R_MIPS_TLS_DTPREL32
6129 : elfcpp::R_MIPS_TLS_DTPREL64
);
6130 if (!parameters
->doing_static_link())
6131 got
->add_global_pair_with_rel(mips_sym
, got_type
,
6132 target
->rel_dyn_section(layout
), r_type1
, r_type2
);
6135 // Add a GOT pair for for R_MIPS_TLS_GD. The creates a pair of
6136 // GOT entries. The first one is initialized to be 1, which is the
6137 // module index for the main executable and the second one 0. A
6138 // reloc of the type R_MIPS_TLS_DTPREL32/64 will be created for
6139 // the second GOT entry and will be applied by gold.
6140 unsigned int got_offset
= got
->add_constant(1);
6141 mips_sym
->set_got_offset(got_type
, got_offset
);
6142 got
->add_constant(0);
6143 got
->add_static_reloc(got_offset
+ size
/8, r_type2
, mips_sym
);
6146 else if (entry
->tls_type() == GOT_TLS_IE
)
6148 unsigned int got_type
;
6149 if (!got
->multi_got())
6150 got_type
= GOT_TYPE_TLS_OFFSET
;
6152 got_type
= GOT_TYPE_TLS_OFFSET_MULTIGOT
+ this->index_
;
6153 unsigned int r_type
= (size
== 32 ? elfcpp::R_MIPS_TLS_TPREL32
6154 : elfcpp::R_MIPS_TLS_TPREL64
);
6155 if (!parameters
->doing_static_link())
6156 got
->add_global_with_rel(mips_sym
, got_type
,
6157 target
->rel_dyn_section(layout
), r_type
);
6160 got
->add_global(mips_sym
, got_type
);
6161 unsigned int got_offset
= mips_sym
->got_offset(got_type
);
6162 got
->add_static_reloc(got_offset
, r_type
, mips_sym
);
6170 // Decide whether the symbol needs an entry in the global part of the primary
6171 // GOT, setting global_got_area accordingly. Count the number of global
6172 // symbols that are in the primary GOT only because they have dynamic
6173 // relocations R_MIPS_REL32 against them (reloc_only_gotno).
6175 template<int size
, bool big_endian
>
6177 Mips_got_info
<size
, big_endian
>::count_got_symbols(Symbol_table
* symtab
)
6179 for (typename
Global_got_entry_set::iterator
6180 p
= this->global_got_symbols_
.begin();
6181 p
!= this->global_got_symbols_
.end();
6184 Mips_symbol
<size
>* sym
= *p
;
6185 // Make a final decision about whether the symbol belongs in the
6186 // local or global GOT. Symbols that bind locally can (and in the
6187 // case of forced-local symbols, must) live in the local GOT.
6188 // Those that are aren't in the dynamic symbol table must also
6189 // live in the local GOT.
6191 if (!sym
->should_add_dynsym_entry(symtab
)
6192 || (sym
->got_only_for_calls()
6193 ? symbol_calls_local(sym
, sym
->should_add_dynsym_entry(symtab
))
6194 : symbol_references_local(sym
,
6195 sym
->should_add_dynsym_entry(symtab
))))
6196 // The symbol belongs in the local GOT. We no longer need this
6197 // entry if it was only used for relocations; those relocations
6198 // will be against the null or section symbol instead.
6199 sym
->set_global_got_area(GGA_NONE
);
6200 else if (sym
->global_got_area() == GGA_RELOC_ONLY
)
6202 ++this->reloc_only_gotno_
;
6203 ++this->global_gotno_
;
6208 // Return the offset of GOT page entry for VALUE. Initialize the entry with
6209 // VALUE if it is not initialized.
6211 template<int size
, bool big_endian
>
6213 Mips_got_info
<size
, big_endian
>::get_got_page_offset(Mips_address value
,
6214 Mips_output_data_got
<size
, big_endian
>* got
)
6216 typename
Got_page_offsets::iterator it
= this->got_page_offsets_
.find(value
);
6217 if (it
!= this->got_page_offsets_
.end())
6220 gold_assert(this->got_page_offset_next_
< this->got_page_offset_start_
6221 + (size
/8) * this->page_gotno_
);
6223 unsigned int got_offset
= this->got_page_offset_next_
;
6224 this->got_page_offsets_
[value
] = got_offset
;
6225 this->got_page_offset_next_
+= size
/8;
6226 got
->update_got_entry(got_offset
, value
);
6230 // Remove lazy-binding stubs for global symbols in this GOT.
6232 template<int size
, bool big_endian
>
6234 Mips_got_info
<size
, big_endian
>::remove_lazy_stubs(
6235 Target_mips
<size
, big_endian
>* target
)
6237 for (typename
Got_entry_set::iterator
6238 p
= this->got_entries_
.begin();
6239 p
!= this->got_entries_
.end();
6242 Mips_got_entry
<size
, big_endian
>* entry
= *p
;
6243 if (entry
->is_for_global_symbol())
6244 target
->remove_lazy_stub_entry(entry
->sym());
6248 // Count the number of GOT entries required.
6250 template<int size
, bool big_endian
>
6252 Mips_got_info
<size
, big_endian
>::count_got_entries()
6254 for (typename
Got_entry_set::iterator
6255 p
= this->got_entries_
.begin();
6256 p
!= this->got_entries_
.end();
6259 this->count_got_entry(*p
);
6263 // Count the number of GOT entries required by ENTRY. Accumulate the result.
6265 template<int size
, bool big_endian
>
6267 Mips_got_info
<size
, big_endian
>::count_got_entry(
6268 Mips_got_entry
<size
, big_endian
>* entry
)
6270 if (entry
->is_tls_entry())
6271 this->tls_gotno_
+= mips_tls_got_entries(entry
->tls_type());
6272 else if (entry
->is_for_local_symbol()
6273 || entry
->sym()->global_got_area() == GGA_NONE
)
6274 ++this->local_gotno_
;
6276 ++this->global_gotno_
;
6279 // Add FROM's GOT entries.
6281 template<int size
, bool big_endian
>
6283 Mips_got_info
<size
, big_endian
>::add_got_entries(
6284 Mips_got_info
<size
, big_endian
>* from
)
6286 for (typename
Got_entry_set::iterator
6287 p
= from
->got_entries_
.begin();
6288 p
!= from
->got_entries_
.end();
6291 Mips_got_entry
<size
, big_endian
>* entry
= *p
;
6292 if (this->got_entries_
.find(entry
) == this->got_entries_
.end())
6294 Mips_got_entry
<size
, big_endian
>* entry2
=
6295 new Mips_got_entry
<size
, big_endian
>(*entry
);
6296 this->got_entries_
.insert(entry2
);
6297 this->count_got_entry(entry
);
6302 // Add FROM's GOT page entries.
6304 template<int size
, bool big_endian
>
6306 Mips_got_info
<size
, big_endian
>::add_got_page_entries(
6307 Mips_got_info
<size
, big_endian
>* from
)
6309 for (typename
Got_page_entry_set::iterator
6310 p
= from
->got_page_entries_
.begin();
6311 p
!= from
->got_page_entries_
.end();
6314 Got_page_entry
* entry
= *p
;
6315 if (this->got_page_entries_
.find(entry
) == this->got_page_entries_
.end())
6317 Got_page_entry
* entry2
= new Got_page_entry(*entry
);
6318 this->got_page_entries_
.insert(entry2
);
6319 this->page_gotno_
+= entry
->num_pages
;
6324 // Mips_output_data_got methods.
6326 // Lay out the GOT. Add local, global and TLS entries. If GOT is
6327 // larger than 64K, create multi-GOT.
6329 template<int size
, bool big_endian
>
6331 Mips_output_data_got
<size
, big_endian
>::lay_out_got(Layout
* layout
,
6332 Symbol_table
* symtab
, const Input_objects
* input_objects
)
6334 // Decide which symbols need to go in the global part of the GOT and
6335 // count the number of reloc-only GOT symbols.
6336 this->master_got_info_
->count_got_symbols(symtab
);
6338 // Count the number of GOT entries.
6339 this->master_got_info_
->count_got_entries();
6341 unsigned int got_size
= this->master_got_info_
->got_size();
6342 if (got_size
> Target_mips
<size
, big_endian
>::MIPS_GOT_MAX_SIZE
)
6343 this->lay_out_multi_got(layout
, input_objects
);
6346 // Record that all objects use single GOT.
6347 for (Input_objects::Relobj_iterator p
= input_objects
->relobj_begin();
6348 p
!= input_objects
->relobj_end();
6351 Mips_relobj
<size
, big_endian
>* object
=
6352 Mips_relobj
<size
, big_endian
>::as_mips_relobj(*p
);
6353 if (object
->get_got_info() != NULL
)
6354 object
->set_got_info(this->master_got_info_
);
6357 this->master_got_info_
->add_local_entries(this->target_
, layout
);
6358 this->master_got_info_
->add_global_entries(this->target_
, layout
,
6360 this->master_got_info_
->add_tls_entries(this->target_
, layout
);
6364 // Create multi-GOT. For every GOT, add local, global and TLS entries.
6366 template<int size
, bool big_endian
>
6368 Mips_output_data_got
<size
, big_endian
>::lay_out_multi_got(Layout
* layout
,
6369 const Input_objects
* input_objects
)
6371 // Try to merge the GOTs of input objects together, as long as they
6372 // don't seem to exceed the maximum GOT size, choosing one of them
6373 // to be the primary GOT.
6374 this->merge_gots(input_objects
);
6376 // Every symbol that is referenced in a dynamic relocation must be
6377 // present in the primary GOT.
6378 this->primary_got_
->set_global_gotno(this->master_got_info_
->global_gotno());
6382 unsigned int offset
= 0;
6383 Mips_got_info
<size
, big_endian
>* g
= this->primary_got_
;
6387 g
->set_offset(offset
);
6389 g
->add_local_entries(this->target_
, layout
);
6391 g
->add_global_entries(this->target_
, layout
,
6392 (this->master_got_info_
->global_gotno()
6393 - this->master_got_info_
->reloc_only_gotno()));
6395 g
->add_global_entries(this->target_
, layout
, /*not used*/-1U);
6396 g
->add_tls_entries(this->target_
, layout
);
6398 // Forbid global symbols in every non-primary GOT from having
6399 // lazy-binding stubs.
6401 g
->remove_lazy_stubs(this->target_
);
6404 offset
+= g
->got_size();
6410 // Attempt to merge GOTs of different input objects. Try to use as much as
6411 // possible of the primary GOT, since it doesn't require explicit dynamic
6412 // relocations, but don't use objects that would reference global symbols
6413 // out of the addressable range. Failing the primary GOT, attempt to merge
6414 // with the current GOT, or finish the current GOT and then make make the new
6417 template<int size
, bool big_endian
>
6419 Mips_output_data_got
<size
, big_endian
>::merge_gots(
6420 const Input_objects
* input_objects
)
6422 gold_assert(this->primary_got_
== NULL
);
6423 Mips_got_info
<size
, big_endian
>* current
= NULL
;
6425 for (Input_objects::Relobj_iterator p
= input_objects
->relobj_begin();
6426 p
!= input_objects
->relobj_end();
6429 Mips_relobj
<size
, big_endian
>* object
=
6430 Mips_relobj
<size
, big_endian
>::as_mips_relobj(*p
);
6432 Mips_got_info
<size
, big_endian
>* g
= object
->get_got_info();
6436 g
->count_got_entries();
6438 // Work out the number of page, local and TLS entries.
6439 unsigned int estimate
= this->master_got_info_
->page_gotno();
6440 if (estimate
> g
->page_gotno())
6441 estimate
= g
->page_gotno();
6442 estimate
+= g
->local_gotno() + g
->tls_gotno();
6444 // We place TLS GOT entries after both locals and globals. The globals
6445 // for the primary GOT may overflow the normal GOT size limit, so be
6446 // sure not to merge a GOT which requires TLS with the primary GOT in that
6447 // case. This doesn't affect non-primary GOTs.
6448 estimate
+= (g
->tls_gotno() > 0 ? this->master_got_info_
->global_gotno()
6449 : g
->global_gotno());
6451 unsigned int max_count
=
6452 Target_mips
<size
, big_endian
>::MIPS_GOT_MAX_SIZE
/ (size
/8) - 2;
6453 if (estimate
<= max_count
)
6455 // If we don't have a primary GOT, use it as
6456 // a starting point for the primary GOT.
6457 if (!this->primary_got_
)
6459 this->primary_got_
= g
;
6463 // Try merging with the primary GOT.
6464 if (this->merge_got_with(g
, object
, this->primary_got_
))
6468 // If we can merge with the last-created GOT, do it.
6469 if (current
&& this->merge_got_with(g
, object
, current
))
6472 // Well, we couldn't merge, so create a new GOT. Don't check if it
6473 // fits; if it turns out that it doesn't, we'll get relocation
6474 // overflows anyway.
6475 g
->set_next(current
);
6479 // If we do not find any suitable primary GOT, create an empty one.
6480 if (this->primary_got_
== NULL
)
6481 this->primary_got_
= new Mips_got_info
<size
, big_endian
>();
6483 // Link primary GOT with secondary GOTs.
6484 this->primary_got_
->set_next(current
);
6487 // Consider merging FROM, which is OBJECT's GOT, into TO. Return false if
6488 // this would lead to overflow, true if they were merged successfully.
6490 template<int size
, bool big_endian
>
6492 Mips_output_data_got
<size
, big_endian
>::merge_got_with(
6493 Mips_got_info
<size
, big_endian
>* from
,
6494 Mips_relobj
<size
, big_endian
>* object
,
6495 Mips_got_info
<size
, big_endian
>* to
)
6497 // Work out how many page entries we would need for the combined GOT.
6498 unsigned int estimate
= this->master_got_info_
->page_gotno();
6499 if (estimate
>= from
->page_gotno() + to
->page_gotno())
6500 estimate
= from
->page_gotno() + to
->page_gotno();
6502 // Conservatively estimate how many local and TLS entries would be needed.
6503 estimate
+= from
->local_gotno() + to
->local_gotno();
6504 estimate
+= from
->tls_gotno() + to
->tls_gotno();
6506 // If we're merging with the primary got, any TLS relocations will
6507 // come after the full set of global entries. Otherwise estimate those
6508 // conservatively as well.
6509 if (to
== this->primary_got_
&& (from
->tls_gotno() + to
->tls_gotno()) > 0)
6510 estimate
+= this->master_got_info_
->global_gotno();
6512 estimate
+= from
->global_gotno() + to
->global_gotno();
6514 // Bail out if the combined GOT might be too big.
6515 unsigned int max_count
=
6516 Target_mips
<size
, big_endian
>::MIPS_GOT_MAX_SIZE
/ (size
/8) - 2;
6517 if (estimate
> max_count
)
6520 // Transfer the object's GOT information from FROM to TO.
6521 to
->add_got_entries(from
);
6522 to
->add_got_page_entries(from
);
6524 // Record that OBJECT should use output GOT TO.
6525 object
->set_got_info(to
);
6530 // Write out the GOT.
6532 template<int size
, bool big_endian
>
6534 Mips_output_data_got
<size
, big_endian
>::do_write(Output_file
* of
)
6536 typedef Unordered_set
<Mips_symbol
<size
>*, Mips_symbol_hash
<size
> >
6537 Mips_stubs_entry_set
;
6539 // Call parent to write out GOT.
6540 Output_data_got
<size
, big_endian
>::do_write(of
);
6542 const off_t offset
= this->offset();
6543 const section_size_type oview_size
=
6544 convert_to_section_size_type(this->data_size());
6545 unsigned char* const oview
= of
->get_output_view(offset
, oview_size
);
6547 // Needed for fixing values of .got section.
6548 this->got_view_
= oview
;
6550 // Write lazy stub addresses.
6551 for (typename
Mips_stubs_entry_set::iterator
6552 p
= this->master_got_info_
->global_got_symbols().begin();
6553 p
!= this->master_got_info_
->global_got_symbols().end();
6556 Mips_symbol
<size
>* mips_sym
= *p
;
6557 if (mips_sym
->has_lazy_stub())
6559 Valtype
* wv
= reinterpret_cast<Valtype
*>(
6560 oview
+ this->get_primary_got_offset(mips_sym
));
6562 this->target_
->mips_stubs_section()->stub_address(mips_sym
);
6563 elfcpp::Swap
<size
, big_endian
>::writeval(wv
, value
);
6567 // Add +1 to GGA_NONE nonzero MIPS16 and microMIPS entries.
6568 for (typename
Mips_stubs_entry_set::iterator
6569 p
= this->master_got_info_
->global_got_symbols().begin();
6570 p
!= this->master_got_info_
->global_got_symbols().end();
6573 Mips_symbol
<size
>* mips_sym
= *p
;
6574 if (!this->multi_got()
6575 && (mips_sym
->is_mips16() || mips_sym
->is_micromips())
6576 && mips_sym
->global_got_area() == GGA_NONE
6577 && mips_sym
->has_got_offset(GOT_TYPE_STANDARD
))
6579 Valtype
* wv
= reinterpret_cast<Valtype
*>(
6580 oview
+ mips_sym
->got_offset(GOT_TYPE_STANDARD
));
6581 Valtype value
= elfcpp::Swap
<size
, big_endian
>::readval(wv
);
6585 elfcpp::Swap
<size
, big_endian
>::writeval(wv
, value
);
6590 if (!this->secondary_got_relocs_
.empty())
6592 // Fixup for the secondary GOT R_MIPS_REL32 relocs. For global
6593 // secondary GOT entries with non-zero initial value copy the value
6594 // to the corresponding primary GOT entry, and set the secondary GOT
6596 // TODO(sasa): This is workaround. It needs to be investigated further.
6598 for (size_t i
= 0; i
< this->secondary_got_relocs_
.size(); ++i
)
6600 Static_reloc
& reloc(this->secondary_got_relocs_
[i
]);
6601 if (reloc
.symbol_is_global())
6603 Mips_symbol
<size
>* gsym
= reloc
.symbol();
6604 gold_assert(gsym
!= NULL
);
6606 unsigned got_offset
= reloc
.got_offset();
6607 gold_assert(got_offset
< oview_size
);
6609 // Find primary GOT entry.
6610 Valtype
* wv_prim
= reinterpret_cast<Valtype
*>(
6611 oview
+ this->get_primary_got_offset(gsym
));
6613 // Find secondary GOT entry.
6614 Valtype
* wv_sec
= reinterpret_cast<Valtype
*>(oview
+ got_offset
);
6616 Valtype value
= elfcpp::Swap
<size
, big_endian
>::readval(wv_sec
);
6619 elfcpp::Swap
<size
, big_endian
>::writeval(wv_prim
, value
);
6620 elfcpp::Swap
<size
, big_endian
>::writeval(wv_sec
, 0);
6621 gsym
->set_applied_secondary_got_fixup();
6626 of
->write_output_view(offset
, oview_size
, oview
);
6629 // We are done if there is no fix up.
6630 if (this->static_relocs_
.empty())
6633 Output_segment
* tls_segment
= this->layout_
->tls_segment();
6634 gold_assert(tls_segment
!= NULL
);
6636 for (size_t i
= 0; i
< this->static_relocs_
.size(); ++i
)
6638 Static_reloc
& reloc(this->static_relocs_
[i
]);
6641 if (!reloc
.symbol_is_global())
6643 Sized_relobj_file
<size
, big_endian
>* object
= reloc
.relobj();
6644 const Symbol_value
<size
>* psymval
=
6645 object
->local_symbol(reloc
.index());
6647 // We are doing static linking. Issue an error and skip this
6648 // relocation if the symbol is undefined or in a discarded_section.
6650 unsigned int shndx
= psymval
->input_shndx(&is_ordinary
);
6651 if ((shndx
== elfcpp::SHN_UNDEF
)
6653 && shndx
!= elfcpp::SHN_UNDEF
6654 && !object
->is_section_included(shndx
)
6655 && !this->symbol_table_
->is_section_folded(object
, shndx
)))
6657 gold_error(_("undefined or discarded local symbol %u from "
6658 " object %s in GOT"),
6659 reloc
.index(), reloc
.relobj()->name().c_str());
6663 value
= psymval
->value(object
, 0);
6667 const Mips_symbol
<size
>* gsym
= reloc
.symbol();
6668 gold_assert(gsym
!= NULL
);
6670 // We are doing static linking. Issue an error and skip this
6671 // relocation if the symbol is undefined or in a discarded_section
6672 // unless it is a weakly_undefined symbol.
6673 if ((gsym
->is_defined_in_discarded_section() || gsym
->is_undefined())
6674 && !gsym
->is_weak_undefined())
6676 gold_error(_("undefined or discarded symbol %s in GOT"),
6681 if (!gsym
->is_weak_undefined())
6682 value
= gsym
->value();
6687 unsigned got_offset
= reloc
.got_offset();
6688 gold_assert(got_offset
< oview_size
);
6690 Valtype
* wv
= reinterpret_cast<Valtype
*>(oview
+ got_offset
);
6693 switch (reloc
.r_type())
6695 case elfcpp::R_MIPS_TLS_DTPMOD32
:
6696 case elfcpp::R_MIPS_TLS_DTPMOD64
:
6699 case elfcpp::R_MIPS_TLS_DTPREL32
:
6700 case elfcpp::R_MIPS_TLS_DTPREL64
:
6701 x
= value
- elfcpp::DTP_OFFSET
;
6703 case elfcpp::R_MIPS_TLS_TPREL32
:
6704 case elfcpp::R_MIPS_TLS_TPREL64
:
6705 x
= value
- elfcpp::TP_OFFSET
;
6712 elfcpp::Swap
<size
, big_endian
>::writeval(wv
, x
);
6715 of
->write_output_view(offset
, oview_size
, oview
);
6718 // Mips_relobj methods.
6720 // Count the local symbols. The Mips backend needs to know if a symbol
6721 // is a MIPS16 or microMIPS function or not. For global symbols, it is easy
6722 // because the Symbol object keeps the ELF symbol type and st_other field.
6723 // For local symbol it is harder because we cannot access this information.
6724 // So we override the do_count_local_symbol in parent and scan local symbols to
6725 // mark MIPS16 and microMIPS functions. This is not the most efficient way but
6726 // I do not want to slow down other ports by calling a per symbol target hook
6727 // inside Sized_relobj_file<size, big_endian>::do_count_local_symbols.
6729 template<int size
, bool big_endian
>
6731 Mips_relobj
<size
, big_endian
>::do_count_local_symbols(
6732 Stringpool_template
<char>* pool
,
6733 Stringpool_template
<char>* dynpool
)
6735 // Ask parent to count the local symbols.
6736 Sized_relobj_file
<size
, big_endian
>::do_count_local_symbols(pool
, dynpool
);
6737 const unsigned int loccount
= this->local_symbol_count();
6741 // Initialize the mips16 and micromips function bit-vector.
6742 this->local_symbol_is_mips16_
.resize(loccount
, false);
6743 this->local_symbol_is_micromips_
.resize(loccount
, false);
6745 // Read the symbol table section header.
6746 const unsigned int symtab_shndx
= this->symtab_shndx();
6747 elfcpp::Shdr
<size
, big_endian
>
6748 symtabshdr(this, this->elf_file()->section_header(symtab_shndx
));
6749 gold_assert(symtabshdr
.get_sh_type() == elfcpp::SHT_SYMTAB
);
6751 // Read the local symbols.
6752 const int sym_size
= elfcpp::Elf_sizes
<size
>::sym_size
;
6753 gold_assert(loccount
== symtabshdr
.get_sh_info());
6754 off_t locsize
= loccount
* sym_size
;
6755 const unsigned char* psyms
= this->get_view(symtabshdr
.get_sh_offset(),
6756 locsize
, true, true);
6758 // Loop over the local symbols and mark any MIPS16 or microMIPS local symbols.
6760 // Skip the first dummy symbol.
6762 for (unsigned int i
= 1; i
< loccount
; ++i
, psyms
+= sym_size
)
6764 elfcpp::Sym
<size
, big_endian
> sym(psyms
);
6765 unsigned char st_other
= sym
.get_st_other();
6766 this->local_symbol_is_mips16_
[i
] = elfcpp::elf_st_is_mips16(st_other
);
6767 this->local_symbol_is_micromips_
[i
] =
6768 elfcpp::elf_st_is_micromips(st_other
);
6772 // Read the symbol information.
6774 template<int size
, bool big_endian
>
6776 Mips_relobj
<size
, big_endian
>::do_read_symbols(Read_symbols_data
* sd
)
6778 // Call parent class to read symbol information.
6779 this->base_read_symbols(sd
);
6781 // Read processor-specific flags in ELF file header.
6782 const unsigned char* pehdr
= this->get_view(elfcpp::file_header_offset
,
6783 elfcpp::Elf_sizes
<size
>::ehdr_size
,
6785 elfcpp::Ehdr
<size
, big_endian
> ehdr(pehdr
);
6786 this->processor_specific_flags_
= ehdr
.get_e_flags();
6788 // Get the section names.
6789 const unsigned char* pnamesu
= sd
->section_names
->data();
6790 const char* pnames
= reinterpret_cast<const char*>(pnamesu
);
6792 // Initialize the mips16 stub section bit-vectors.
6793 this->section_is_mips16_fn_stub_
.resize(this->shnum(), false);
6794 this->section_is_mips16_call_stub_
.resize(this->shnum(), false);
6795 this->section_is_mips16_call_fp_stub_
.resize(this->shnum(), false);
6797 const size_t shdr_size
= elfcpp::Elf_sizes
<size
>::shdr_size
;
6798 const unsigned char* pshdrs
= sd
->section_headers
->data();
6799 const unsigned char* ps
= pshdrs
+ shdr_size
;
6800 for (unsigned int i
= 1; i
< this->shnum(); ++i
, ps
+= shdr_size
)
6802 elfcpp::Shdr
<size
, big_endian
> shdr(ps
);
6804 if (shdr
.get_sh_type() == elfcpp::SHT_MIPS_REGINFO
)
6806 this->has_reginfo_section_
= true;
6807 // Read the gp value that was used to create this object. We need the
6808 // gp value while processing relocs. The .reginfo section is not used
6809 // in the 64-bit MIPS ELF ABI.
6810 section_offset_type section_offset
= shdr
.get_sh_offset();
6811 section_size_type section_size
=
6812 convert_to_section_size_type(shdr
.get_sh_size());
6813 const unsigned char* view
=
6814 this->get_view(section_offset
, section_size
, true, false);
6816 this->gp_
= elfcpp::Swap
<size
, big_endian
>::readval(view
+ 20);
6818 // Read the rest of .reginfo.
6819 this->gprmask_
= elfcpp::Swap
<size
, big_endian
>::readval(view
);
6820 this->cprmask1_
= elfcpp::Swap
<size
, big_endian
>::readval(view
+ 4);
6821 this->cprmask2_
= elfcpp::Swap
<size
, big_endian
>::readval(view
+ 8);
6822 this->cprmask3_
= elfcpp::Swap
<size
, big_endian
>::readval(view
+ 12);
6823 this->cprmask4_
= elfcpp::Swap
<size
, big_endian
>::readval(view
+ 16);
6826 if (shdr
.get_sh_type() == elfcpp::SHT_GNU_ATTRIBUTES
)
6828 gold_assert(this->attributes_section_data_
== NULL
);
6829 section_offset_type section_offset
= shdr
.get_sh_offset();
6830 section_size_type section_size
=
6831 convert_to_section_size_type(shdr
.get_sh_size());
6832 const unsigned char* view
=
6833 this->get_view(section_offset
, section_size
, true, false);
6834 this->attributes_section_data_
=
6835 new Attributes_section_data(view
, section_size
);
6838 if (shdr
.get_sh_type() == elfcpp::SHT_MIPS_ABIFLAGS
)
6840 gold_assert(this->abiflags_
== NULL
);
6841 section_offset_type section_offset
= shdr
.get_sh_offset();
6842 section_size_type section_size
=
6843 convert_to_section_size_type(shdr
.get_sh_size());
6844 const unsigned char* view
=
6845 this->get_view(section_offset
, section_size
, true, false);
6846 this->abiflags_
= new Mips_abiflags
<big_endian
>();
6848 this->abiflags_
->version
=
6849 elfcpp::Swap
<16, big_endian
>::readval(view
);
6850 if (this->abiflags_
->version
!= 0)
6852 gold_error(_("%s: .MIPS.abiflags section has "
6853 "unsupported version %u"),
6854 this->name().c_str(),
6855 this->abiflags_
->version
);
6858 this->abiflags_
->isa_level
=
6859 elfcpp::Swap
<8, big_endian
>::readval(view
+ 2);
6860 this->abiflags_
->isa_rev
=
6861 elfcpp::Swap
<8, big_endian
>::readval(view
+ 3);
6862 this->abiflags_
->gpr_size
=
6863 elfcpp::Swap
<8, big_endian
>::readval(view
+ 4);
6864 this->abiflags_
->cpr1_size
=
6865 elfcpp::Swap
<8, big_endian
>::readval(view
+ 5);
6866 this->abiflags_
->cpr2_size
=
6867 elfcpp::Swap
<8, big_endian
>::readval(view
+ 6);
6868 this->abiflags_
->fp_abi
=
6869 elfcpp::Swap
<8, big_endian
>::readval(view
+ 7);
6870 this->abiflags_
->isa_ext
=
6871 elfcpp::Swap
<32, big_endian
>::readval(view
+ 8);
6872 this->abiflags_
->ases
=
6873 elfcpp::Swap
<32, big_endian
>::readval(view
+ 12);
6874 this->abiflags_
->flags1
=
6875 elfcpp::Swap
<32, big_endian
>::readval(view
+ 16);
6876 this->abiflags_
->flags2
=
6877 elfcpp::Swap
<32, big_endian
>::readval(view
+ 20);
6880 // In the 64-bit ABI, .MIPS.options section holds register information.
6881 // A SHT_MIPS_OPTIONS section contains a series of options, each of which
6882 // starts with this header:
6886 // // Type of option.
6887 // unsigned char kind[1];
6888 // // Size of option descriptor, including header.
6889 // unsigned char size[1];
6890 // // Section index of affected section, or 0 for global option.
6891 // unsigned char section[2];
6892 // // Information specific to this kind of option.
6893 // unsigned char info[4];
6896 // For a SHT_MIPS_OPTIONS section, look for a ODK_REGINFO entry, and set
6897 // the gp value based on what we find. We may see both SHT_MIPS_REGINFO
6898 // and SHT_MIPS_OPTIONS/ODK_REGINFO; in that case, they should agree.
6900 if (shdr
.get_sh_type() == elfcpp::SHT_MIPS_OPTIONS
)
6902 section_offset_type section_offset
= shdr
.get_sh_offset();
6903 section_size_type section_size
=
6904 convert_to_section_size_type(shdr
.get_sh_size());
6905 const unsigned char* view
=
6906 this->get_view(section_offset
, section_size
, true, false);
6907 const unsigned char* end
= view
+ section_size
;
6909 while (view
+ 8 <= end
)
6911 unsigned char kind
= elfcpp::Swap
<8, big_endian
>::readval(view
);
6912 unsigned char sz
= elfcpp::Swap
<8, big_endian
>::readval(view
+ 1);
6915 gold_error(_("%s: Warning: bad `%s' option size %u smaller "
6917 this->name().c_str(),
6918 this->mips_elf_options_section_name(), sz
);
6922 if (this->is_n64() && kind
== elfcpp::ODK_REGINFO
)
6924 // In the 64 bit ABI, an ODK_REGINFO option is the following
6925 // structure. The info field of the options header is not
6930 // // Mask of general purpose registers used.
6931 // unsigned char ri_gprmask[4];
6933 // unsigned char ri_pad[4];
6934 // // Mask of co-processor registers used.
6935 // unsigned char ri_cprmask[4][4];
6936 // // GP register value for this object file.
6937 // unsigned char ri_gp_value[8];
6940 this->gp_
= elfcpp::Swap
<size
, big_endian
>::readval(view
6943 else if (kind
== elfcpp::ODK_REGINFO
)
6945 // In the 32 bit ABI, an ODK_REGINFO option is the following
6946 // structure. The info field of the options header is not
6947 // used. The same structure is used in .reginfo section.
6951 // unsigned char ri_gprmask[4];
6952 // unsigned char ri_cprmask[4][4];
6953 // unsigned char ri_gp_value[4];
6956 this->gp_
= elfcpp::Swap
<size
, big_endian
>::readval(view
6963 const char* name
= pnames
+ shdr
.get_sh_name();
6964 this->section_is_mips16_fn_stub_
[i
] = is_prefix_of(".mips16.fn", name
);
6965 this->section_is_mips16_call_stub_
[i
] =
6966 is_prefix_of(".mips16.call.", name
);
6967 this->section_is_mips16_call_fp_stub_
[i
] =
6968 is_prefix_of(".mips16.call.fp.", name
);
6970 if (strcmp(name
, ".pdr") == 0)
6972 gold_assert(this->pdr_shndx_
== -1U);
6973 this->pdr_shndx_
= i
;
6978 // Discard MIPS16 stub secions that are not needed.
6980 template<int size
, bool big_endian
>
6982 Mips_relobj
<size
, big_endian
>::discard_mips16_stub_sections(Symbol_table
* symtab
)
6984 for (typename
Mips16_stubs_int_map::const_iterator
6985 it
= this->mips16_stub_sections_
.begin();
6986 it
!= this->mips16_stub_sections_
.end(); ++it
)
6988 Mips16_stub_section
<size
, big_endian
>* stub_section
= it
->second
;
6989 if (!stub_section
->is_target_found())
6991 gold_error(_("no relocation found in mips16 stub section '%s'"),
6992 stub_section
->object()
6993 ->section_name(stub_section
->shndx()).c_str());
6996 bool discard
= false;
6997 if (stub_section
->is_for_local_function())
6999 if (stub_section
->is_fn_stub())
7001 // This stub is for a local symbol. This stub will only
7002 // be needed if there is some relocation in this object,
7003 // other than a 16 bit function call, which refers to this
7005 if (!this->has_local_non_16bit_call_relocs(stub_section
->r_sym()))
7008 this->add_local_mips16_fn_stub(stub_section
);
7012 // This stub is for a local symbol. This stub will only
7013 // be needed if there is some relocation (R_MIPS16_26) in
7014 // this object that refers to this symbol.
7015 gold_assert(stub_section
->is_call_stub()
7016 || stub_section
->is_call_fp_stub());
7017 if (!this->has_local_16bit_call_relocs(stub_section
->r_sym()))
7020 this->add_local_mips16_call_stub(stub_section
);
7025 Mips_symbol
<size
>* gsym
= stub_section
->gsym();
7026 if (stub_section
->is_fn_stub())
7028 if (gsym
->has_mips16_fn_stub())
7029 // We already have a stub for this function.
7033 gsym
->set_mips16_fn_stub(stub_section
);
7034 if (gsym
->should_add_dynsym_entry(symtab
))
7036 // If we have a MIPS16 function with a stub, the
7037 // dynamic symbol must refer to the stub, since only
7038 // the stub uses the standard calling conventions.
7039 gsym
->set_need_fn_stub();
7040 if (gsym
->is_from_dynobj())
7041 gsym
->set_needs_dynsym_value();
7044 if (!gsym
->need_fn_stub())
7047 else if (stub_section
->is_call_stub())
7049 if (gsym
->is_mips16())
7050 // We don't need the call_stub; this is a 16 bit
7051 // function, so calls from other 16 bit functions are
7054 else if (gsym
->has_mips16_call_stub())
7055 // We already have a stub for this function.
7058 gsym
->set_mips16_call_stub(stub_section
);
7062 gold_assert(stub_section
->is_call_fp_stub());
7063 if (gsym
->is_mips16())
7064 // We don't need the call_stub; this is a 16 bit
7065 // function, so calls from other 16 bit functions are
7068 else if (gsym
->has_mips16_call_fp_stub())
7069 // We already have a stub for this function.
7072 gsym
->set_mips16_call_fp_stub(stub_section
);
7076 this->set_output_section(stub_section
->shndx(), NULL
);
7080 // Mips_output_data_la25_stub methods.
7082 // Template for standard LA25 stub.
7083 template<int size
, bool big_endian
>
7085 Mips_output_data_la25_stub
<size
, big_endian
>::la25_stub_entry
[] =
7087 0x3c190000, // lui $25,%hi(func)
7088 0x08000000, // j func
7089 0x27390000, // add $25,$25,%lo(func)
7093 // Template for microMIPS LA25 stub.
7094 template<int size
, bool big_endian
>
7096 Mips_output_data_la25_stub
<size
, big_endian
>::la25_stub_micromips_entry
[] =
7098 0x41b9, 0x0000, // lui t9,%hi(func)
7099 0xd400, 0x0000, // j func
7100 0x3339, 0x0000, // addiu t9,t9,%lo(func)
7101 0x0000, 0x0000 // nop
7104 // Create la25 stub for a symbol.
7106 template<int size
, bool big_endian
>
7108 Mips_output_data_la25_stub
<size
, big_endian
>::create_la25_stub(
7109 Symbol_table
* symtab
, Target_mips
<size
, big_endian
>* target
,
7110 Mips_symbol
<size
>* gsym
)
7112 if (!gsym
->has_la25_stub())
7114 gsym
->set_la25_stub_offset(this->symbols_
.size() * 16);
7115 this->symbols_
.push_back(gsym
);
7116 this->create_stub_symbol(gsym
, symtab
, target
, 16);
7120 // Create a symbol for SYM stub's value and size, to help make the disassembly
7123 template<int size
, bool big_endian
>
7125 Mips_output_data_la25_stub
<size
, big_endian
>::create_stub_symbol(
7126 Mips_symbol
<size
>* sym
, Symbol_table
* symtab
,
7127 Target_mips
<size
, big_endian
>* target
, uint64_t symsize
)
7129 std::string
name(".pic.");
7130 name
+= sym
->name();
7132 unsigned int offset
= sym
->la25_stub_offset();
7133 if (sym
->is_micromips())
7136 // Make it a local function.
7137 Symbol
* new_sym
= symtab
->define_in_output_data(name
.c_str(), NULL
,
7138 Symbol_table::PREDEFINED
,
7139 target
->la25_stub_section(),
7140 offset
, symsize
, elfcpp::STT_FUNC
,
7142 elfcpp::STV_DEFAULT
, 0,
7144 new_sym
->set_is_forced_local();
7147 // Write out la25 stubs. This uses the hand-coded instructions above,
7148 // and adjusts them as needed.
7150 template<int size
, bool big_endian
>
7152 Mips_output_data_la25_stub
<size
, big_endian
>::do_write(Output_file
* of
)
7154 const off_t offset
= this->offset();
7155 const section_size_type oview_size
=
7156 convert_to_section_size_type(this->data_size());
7157 unsigned char* const oview
= of
->get_output_view(offset
, oview_size
);
7159 for (typename
std::vector
<Mips_symbol
<size
>*>::iterator
7160 p
= this->symbols_
.begin();
7161 p
!= this->symbols_
.end();
7164 Mips_symbol
<size
>* sym
= *p
;
7165 unsigned char* pov
= oview
+ sym
->la25_stub_offset();
7167 Mips_address target
= sym
->value();
7168 if (!sym
->is_micromips())
7170 elfcpp::Swap
<32, big_endian
>::writeval(pov
,
7171 la25_stub_entry
[0] | (((target
+ 0x8000) >> 16) & 0xffff));
7172 elfcpp::Swap
<32, big_endian
>::writeval(pov
+ 4,
7173 la25_stub_entry
[1] | ((target
>> 2) & 0x3ffffff));
7174 elfcpp::Swap
<32, big_endian
>::writeval(pov
+ 8,
7175 la25_stub_entry
[2] | (target
& 0xffff));
7176 elfcpp::Swap
<32, big_endian
>::writeval(pov
+ 12, la25_stub_entry
[3]);
7181 // First stub instruction. Paste high 16-bits of the target.
7182 elfcpp::Swap
<16, big_endian
>::writeval(pov
,
7183 la25_stub_micromips_entry
[0]);
7184 elfcpp::Swap
<16, big_endian
>::writeval(pov
+ 2,
7185 ((target
+ 0x8000) >> 16) & 0xffff);
7186 // Second stub instruction. Paste low 26-bits of the target, shifted
7188 elfcpp::Swap
<16, big_endian
>::writeval(pov
+ 4,
7189 la25_stub_micromips_entry
[2] | ((target
>> 17) & 0x3ff));
7190 elfcpp::Swap
<16, big_endian
>::writeval(pov
+ 6,
7191 la25_stub_micromips_entry
[3] | ((target
>> 1) & 0xffff));
7192 // Third stub instruction. Paste low 16-bits of the target.
7193 elfcpp::Swap
<16, big_endian
>::writeval(pov
+ 8,
7194 la25_stub_micromips_entry
[4]);
7195 elfcpp::Swap
<16, big_endian
>::writeval(pov
+ 10, target
& 0xffff);
7196 // Fourth stub instruction.
7197 elfcpp::Swap
<16, big_endian
>::writeval(pov
+ 12,
7198 la25_stub_micromips_entry
[6]);
7199 elfcpp::Swap
<16, big_endian
>::writeval(pov
+ 14,
7200 la25_stub_micromips_entry
[7]);
7204 of
->write_output_view(offset
, oview_size
, oview
);
7207 // Mips_output_data_plt methods.
7209 // The format of the first PLT entry in an O32 executable.
7210 template<int size
, bool big_endian
>
7211 const uint32_t Mips_output_data_plt
<size
, big_endian
>::plt0_entry_o32
[] =
7213 0x3c1c0000, // lui $28, %hi(&GOTPLT[0])
7214 0x8f990000, // lw $25, %lo(&GOTPLT[0])($28)
7215 0x279c0000, // addiu $28, $28, %lo(&GOTPLT[0])
7216 0x031cc023, // subu $24, $24, $28
7217 0x03e07825, // or $15, $31, zero
7218 0x0018c082, // srl $24, $24, 2
7219 0x0320f809, // jalr $25
7220 0x2718fffe // subu $24, $24, 2
7223 // The format of the first PLT entry in an N32 executable. Different
7224 // because gp ($28) is not available; we use t2 ($14) instead.
7225 template<int size
, bool big_endian
>
7226 const uint32_t Mips_output_data_plt
<size
, big_endian
>::plt0_entry_n32
[] =
7228 0x3c0e0000, // lui $14, %hi(&GOTPLT[0])
7229 0x8dd90000, // lw $25, %lo(&GOTPLT[0])($14)
7230 0x25ce0000, // addiu $14, $14, %lo(&GOTPLT[0])
7231 0x030ec023, // subu $24, $24, $14
7232 0x03e07825, // or $15, $31, zero
7233 0x0018c082, // srl $24, $24, 2
7234 0x0320f809, // jalr $25
7235 0x2718fffe // subu $24, $24, 2
7238 // The format of the first PLT entry in an N64 executable. Different
7239 // from N32 because of the increased size of GOT entries.
7240 template<int size
, bool big_endian
>
7241 const uint32_t Mips_output_data_plt
<size
, big_endian
>::plt0_entry_n64
[] =
7243 0x3c0e0000, // lui $14, %hi(&GOTPLT[0])
7244 0xddd90000, // ld $25, %lo(&GOTPLT[0])($14)
7245 0x25ce0000, // addiu $14, $14, %lo(&GOTPLT[0])
7246 0x030ec023, // subu $24, $24, $14
7247 0x03e07825, // or $15, $31, zero
7248 0x0018c0c2, // srl $24, $24, 3
7249 0x0320f809, // jalr $25
7250 0x2718fffe // subu $24, $24, 2
7253 // The format of the microMIPS first PLT entry in an O32 executable.
7254 // We rely on v0 ($2) rather than t8 ($24) to contain the address
7255 // of the GOTPLT entry handled, so this stub may only be used when
7256 // all the subsequent PLT entries are microMIPS code too.
7258 // The trailing NOP is for alignment and correct disassembly only.
7259 template<int size
, bool big_endian
>
7260 const uint32_t Mips_output_data_plt
<size
, big_endian
>::
7261 plt0_entry_micromips_o32
[] =
7263 0x7980, 0x0000, // addiupc $3, (&GOTPLT[0]) - .
7264 0xff23, 0x0000, // lw $25, 0($3)
7265 0x0535, // subu $2, $2, $3
7266 0x2525, // srl $2, $2, 2
7267 0x3302, 0xfffe, // subu $24, $2, 2
7268 0x0dff, // move $15, $31
7269 0x45f9, // jalrs $25
7270 0x0f83, // move $28, $3
7274 // The format of the microMIPS first PLT entry in an O32 executable
7275 // in the insn32 mode.
7276 template<int size
, bool big_endian
>
7277 const uint32_t Mips_output_data_plt
<size
, big_endian
>::
7278 plt0_entry_micromips32_o32
[] =
7280 0x41bc, 0x0000, // lui $28, %hi(&GOTPLT[0])
7281 0xff3c, 0x0000, // lw $25, %lo(&GOTPLT[0])($28)
7282 0x339c, 0x0000, // addiu $28, $28, %lo(&GOTPLT[0])
7283 0x0398, 0xc1d0, // subu $24, $24, $28
7284 0x001f, 0x7a90, // or $15, $31, zero
7285 0x0318, 0x1040, // srl $24, $24, 2
7286 0x03f9, 0x0f3c, // jalr $25
7287 0x3318, 0xfffe // subu $24, $24, 2
7290 // The format of subsequent standard entries in the PLT.
7291 template<int size
, bool big_endian
>
7292 const uint32_t Mips_output_data_plt
<size
, big_endian
>::plt_entry
[] =
7294 0x3c0f0000, // lui $15, %hi(.got.plt entry)
7295 0x01f90000, // l[wd] $25, %lo(.got.plt entry)($15)
7296 0x03200008, // jr $25
7297 0x25f80000 // addiu $24, $15, %lo(.got.plt entry)
7300 // The format of subsequent R6 PLT entries.
7301 template<int size
, bool big_endian
>
7302 const uint32_t Mips_output_data_plt
<size
, big_endian
>::plt_entry_r6
[] =
7304 0x3c0f0000, // lui $15, %hi(.got.plt entry)
7305 0x01f90000, // l[wd] $25, %lo(.got.plt entry)($15)
7306 0x03200009, // jr $25
7307 0x25f80000 // addiu $24, $15, %lo(.got.plt entry)
7310 // The format of subsequent MIPS16 o32 PLT entries. We use v1 ($3) as a
7311 // temporary because t8 ($24) and t9 ($25) are not directly addressable.
7312 // Note that this differs from the GNU ld which uses both v0 ($2) and v1 ($3).
7313 // We cannot use v0 because MIPS16 call stubs from the CS toolchain expect
7314 // target function address in register v0.
7315 template<int size
, bool big_endian
>
7316 const uint32_t Mips_output_data_plt
<size
, big_endian
>::plt_entry_mips16_o32
[] =
7318 0xb303, // lw $3, 12($pc)
7319 0x651b, // move $24, $3
7320 0x9b60, // lw $3, 0($3)
7322 0x653b, // move $25, $3
7324 0x0000, 0x0000 // .word (.got.plt entry)
7327 // The format of subsequent microMIPS o32 PLT entries. We use v0 ($2)
7328 // as a temporary because t8 ($24) is not addressable with ADDIUPC.
7329 template<int size
, bool big_endian
>
7330 const uint32_t Mips_output_data_plt
<size
, big_endian
>::
7331 plt_entry_micromips_o32
[] =
7333 0x7900, 0x0000, // addiupc $2, (.got.plt entry) - .
7334 0xff22, 0x0000, // lw $25, 0($2)
7336 0x0f02 // move $24, $2
7339 // The format of subsequent microMIPS o32 PLT entries in the insn32 mode.
7340 template<int size
, bool big_endian
>
7341 const uint32_t Mips_output_data_plt
<size
, big_endian
>::
7342 plt_entry_micromips32_o32
[] =
7344 0x41af, 0x0000, // lui $15, %hi(.got.plt entry)
7345 0xff2f, 0x0000, // lw $25, %lo(.got.plt entry)($15)
7346 0x0019, 0x0f3c, // jr $25
7347 0x330f, 0x0000 // addiu $24, $15, %lo(.got.plt entry)
7350 // Add an entry to the PLT for a symbol referenced by r_type relocation.
7352 template<int size
, bool big_endian
>
7354 Mips_output_data_plt
<size
, big_endian
>::add_entry(Mips_symbol
<size
>* gsym
,
7355 unsigned int r_type
)
7357 gold_assert(!gsym
->has_plt_offset());
7359 // Final PLT offset for a symbol will be set in method set_plt_offsets().
7360 gsym
->set_plt_offset(this->entry_count() * sizeof(plt_entry
)
7361 + sizeof(plt0_entry_o32
));
7362 this->symbols_
.push_back(gsym
);
7364 // Record whether the relocation requires a standard MIPS
7365 // or a compressed code entry.
7366 if (jal_reloc(r_type
))
7368 if (r_type
== elfcpp::R_MIPS_26
)
7369 gsym
->set_needs_mips_plt(true);
7371 gsym
->set_needs_comp_plt(true);
7374 section_offset_type got_offset
= this->got_plt_
->current_data_size();
7376 // Every PLT entry needs a GOT entry which points back to the PLT
7377 // entry (this will be changed by the dynamic linker, normally
7378 // lazily when the function is called).
7379 this->got_plt_
->set_current_data_size(got_offset
+ size
/8);
7381 gsym
->set_needs_dynsym_entry();
7382 this->rel_
->add_global(gsym
, elfcpp::R_MIPS_JUMP_SLOT
, this->got_plt_
,
7386 // Set final PLT offsets. For each symbol, determine whether standard or
7387 // compressed (MIPS16 or microMIPS) PLT entry is used.
7389 template<int size
, bool big_endian
>
7391 Mips_output_data_plt
<size
, big_endian
>::set_plt_offsets()
7393 // The sizes of individual PLT entries.
7394 unsigned int plt_mips_entry_size
= this->standard_plt_entry_size();
7395 unsigned int plt_comp_entry_size
= (!this->target_
->is_output_newabi()
7396 ? this->compressed_plt_entry_size() : 0);
7398 for (typename
std::vector
<Mips_symbol
<size
>*>::const_iterator
7399 p
= this->symbols_
.begin(); p
!= this->symbols_
.end(); ++p
)
7401 Mips_symbol
<size
>* mips_sym
= *p
;
7403 // There are no defined MIPS16 or microMIPS PLT entries for n32 or n64,
7404 // so always use a standard entry there.
7406 // If the symbol has a MIPS16 call stub and gets a PLT entry, then
7407 // all MIPS16 calls will go via that stub, and there is no benefit
7408 // to having a MIPS16 entry. And in the case of call_stub a
7409 // standard entry actually has to be used as the stub ends with a J
7411 if (this->target_
->is_output_newabi()
7412 || mips_sym
->has_mips16_call_stub()
7413 || mips_sym
->has_mips16_call_fp_stub())
7415 mips_sym
->set_needs_mips_plt(true);
7416 mips_sym
->set_needs_comp_plt(false);
7419 // Otherwise, if there are no direct calls to the function, we
7420 // have a free choice of whether to use standard or compressed
7421 // entries. Prefer microMIPS entries if the object is known to
7422 // contain microMIPS code, so that it becomes possible to create
7423 // pure microMIPS binaries. Prefer standard entries otherwise,
7424 // because MIPS16 ones are no smaller and are usually slower.
7425 if (!mips_sym
->needs_mips_plt() && !mips_sym
->needs_comp_plt())
7427 if (this->target_
->is_output_micromips())
7428 mips_sym
->set_needs_comp_plt(true);
7430 mips_sym
->set_needs_mips_plt(true);
7433 if (mips_sym
->needs_mips_plt())
7435 mips_sym
->set_mips_plt_offset(this->plt_mips_offset_
);
7436 this->plt_mips_offset_
+= plt_mips_entry_size
;
7438 if (mips_sym
->needs_comp_plt())
7440 mips_sym
->set_comp_plt_offset(this->plt_comp_offset_
);
7441 this->plt_comp_offset_
+= plt_comp_entry_size
;
7445 // Figure out the size of the PLT header if we know that we are using it.
7446 if (this->plt_mips_offset_
+ this->plt_comp_offset_
!= 0)
7447 this->plt_header_size_
= this->get_plt_header_size();
7450 // Write out the PLT. This uses the hand-coded instructions above,
7451 // and adjusts them as needed.
7453 template<int size
, bool big_endian
>
7455 Mips_output_data_plt
<size
, big_endian
>::do_write(Output_file
* of
)
7457 const off_t offset
= this->offset();
7458 const section_size_type oview_size
=
7459 convert_to_section_size_type(this->data_size());
7460 unsigned char* const oview
= of
->get_output_view(offset
, oview_size
);
7462 const off_t gotplt_file_offset
= this->got_plt_
->offset();
7463 const section_size_type gotplt_size
=
7464 convert_to_section_size_type(this->got_plt_
->data_size());
7465 unsigned char* const gotplt_view
= of
->get_output_view(gotplt_file_offset
,
7467 unsigned char* pov
= oview
;
7469 Mips_address plt_address
= this->address();
7471 // Calculate the address of .got.plt.
7472 Mips_address gotplt_addr
= this->got_plt_
->address();
7473 Mips_address gotplt_addr_high
= ((gotplt_addr
+ 0x8000) >> 16) & 0xffff;
7474 Mips_address gotplt_addr_low
= gotplt_addr
& 0xffff;
7476 // The PLT sequence is not safe for N64 if .got.plt's address can
7477 // not be loaded in two instructions.
7478 gold_assert((gotplt_addr
& ~(Mips_address
) 0x7fffffff) == 0
7479 || ~(gotplt_addr
| 0x7fffffff) == 0);
7481 // Write the PLT header.
7482 const uint32_t* plt0_entry
= this->get_plt_header_entry();
7483 if (plt0_entry
== plt0_entry_micromips_o32
)
7485 // Write microMIPS PLT header.
7486 gold_assert(gotplt_addr
% 4 == 0);
7488 Mips_address gotpc_offset
= gotplt_addr
- ((plt_address
| 3) ^ 3);
7490 // ADDIUPC has a span of +/-16MB, check we're in range.
7491 if (gotpc_offset
+ 0x1000000 >= 0x2000000)
7493 gold_error(_(".got.plt offset of %ld from .plt beyond the range of "
7494 "ADDIUPC"), (long)gotpc_offset
);
7498 elfcpp::Swap
<16, big_endian
>::writeval(pov
,
7499 plt0_entry
[0] | ((gotpc_offset
>> 18) & 0x7f));
7500 elfcpp::Swap
<16, big_endian
>::writeval(pov
+ 2,
7501 (gotpc_offset
>> 2) & 0xffff);
7503 for (unsigned int i
= 2;
7504 i
< (sizeof(plt0_entry_micromips_o32
)
7505 / sizeof(plt0_entry_micromips_o32
[0]));
7508 elfcpp::Swap
<16, big_endian
>::writeval(pov
, plt0_entry
[i
]);
7512 else if (plt0_entry
== plt0_entry_micromips32_o32
)
7514 // Write microMIPS PLT header in insn32 mode.
7515 elfcpp::Swap
<16, big_endian
>::writeval(pov
, plt0_entry
[0]);
7516 elfcpp::Swap
<16, big_endian
>::writeval(pov
+ 2, gotplt_addr_high
);
7517 elfcpp::Swap
<16, big_endian
>::writeval(pov
+ 4, plt0_entry
[2]);
7518 elfcpp::Swap
<16, big_endian
>::writeval(pov
+ 6, gotplt_addr_low
);
7519 elfcpp::Swap
<16, big_endian
>::writeval(pov
+ 8, plt0_entry
[4]);
7520 elfcpp::Swap
<16, big_endian
>::writeval(pov
+ 10, gotplt_addr_low
);
7522 for (unsigned int i
= 6;
7523 i
< (sizeof(plt0_entry_micromips32_o32
)
7524 / sizeof(plt0_entry_micromips32_o32
[0]));
7527 elfcpp::Swap
<16, big_endian
>::writeval(pov
, plt0_entry
[i
]);
7533 // Write standard PLT header.
7534 elfcpp::Swap
<32, big_endian
>::writeval(pov
,
7535 plt0_entry
[0] | gotplt_addr_high
);
7536 elfcpp::Swap
<32, big_endian
>::writeval(pov
+ 4,
7537 plt0_entry
[1] | gotplt_addr_low
);
7538 elfcpp::Swap
<32, big_endian
>::writeval(pov
+ 8,
7539 plt0_entry
[2] | gotplt_addr_low
);
7541 for (int i
= 3; i
< 8; i
++)
7543 elfcpp::Swap
<32, big_endian
>::writeval(pov
, plt0_entry
[i
]);
7549 unsigned char* gotplt_pov
= gotplt_view
;
7550 unsigned int got_entry_size
= size
/8; // TODO(sasa): MIPS_ELF_GOT_SIZE
7552 // The first two entries in .got.plt are reserved.
7553 elfcpp::Swap
<size
, big_endian
>::writeval(gotplt_pov
, 0);
7554 elfcpp::Swap
<size
, big_endian
>::writeval(gotplt_pov
+ got_entry_size
, 0);
7556 unsigned int gotplt_offset
= 2 * got_entry_size
;
7557 gotplt_pov
+= 2 * got_entry_size
;
7559 // Calculate the address of the PLT header.
7560 Mips_address header_address
= (plt_address
7561 + (this->is_plt_header_compressed() ? 1 : 0));
7563 // Initialize compressed PLT area view.
7564 unsigned char* pov2
= pov
+ this->plt_mips_offset_
;
7566 // Write the PLT entries.
7567 for (typename
std::vector
<Mips_symbol
<size
>*>::const_iterator
7568 p
= this->symbols_
.begin();
7569 p
!= this->symbols_
.end();
7570 ++p
, gotplt_pov
+= got_entry_size
, gotplt_offset
+= got_entry_size
)
7572 Mips_symbol
<size
>* mips_sym
= *p
;
7574 // Calculate the address of the .got.plt entry.
7575 uint32_t gotplt_entry_addr
= (gotplt_addr
+ gotplt_offset
);
7576 uint32_t gotplt_entry_addr_hi
= (((gotplt_entry_addr
+ 0x8000) >> 16)
7578 uint32_t gotplt_entry_addr_lo
= gotplt_entry_addr
& 0xffff;
7580 // Initially point the .got.plt entry at the PLT header.
7581 if (this->target_
->is_output_n64())
7582 elfcpp::Swap
<64, big_endian
>::writeval(gotplt_pov
, header_address
);
7584 elfcpp::Swap
<32, big_endian
>::writeval(gotplt_pov
, header_address
);
7586 // Now handle the PLT itself. First the standard entry.
7587 if (mips_sym
->has_mips_plt_offset())
7589 // Pick the load opcode (LW or LD).
7590 uint64_t load
= this->target_
->is_output_n64() ? 0xdc000000
7593 const uint32_t* entry
= this->target_
->is_output_r6() ? plt_entry_r6
7596 // Fill in the PLT entry itself.
7597 elfcpp::Swap
<32, big_endian
>::writeval(pov
,
7598 entry
[0] | gotplt_entry_addr_hi
);
7599 elfcpp::Swap
<32, big_endian
>::writeval(pov
+ 4,
7600 entry
[1] | gotplt_entry_addr_lo
| load
);
7601 elfcpp::Swap
<32, big_endian
>::writeval(pov
+ 8, entry
[2]);
7602 elfcpp::Swap
<32, big_endian
>::writeval(pov
+ 12,
7603 entry
[3] | gotplt_entry_addr_lo
);
7607 // Now the compressed entry. They come after any standard ones.
7608 if (mips_sym
->has_comp_plt_offset())
7610 if (!this->target_
->is_output_micromips())
7612 // Write MIPS16 PLT entry.
7613 const uint32_t* plt_entry
= plt_entry_mips16_o32
;
7615 elfcpp::Swap
<16, big_endian
>::writeval(pov2
, plt_entry
[0]);
7616 elfcpp::Swap
<16, big_endian
>::writeval(pov2
+ 2, plt_entry
[1]);
7617 elfcpp::Swap
<16, big_endian
>::writeval(pov2
+ 4, plt_entry
[2]);
7618 elfcpp::Swap
<16, big_endian
>::writeval(pov2
+ 6, plt_entry
[3]);
7619 elfcpp::Swap
<16, big_endian
>::writeval(pov2
+ 8, plt_entry
[4]);
7620 elfcpp::Swap
<16, big_endian
>::writeval(pov2
+ 10, plt_entry
[5]);
7621 elfcpp::Swap
<32, big_endian
>::writeval(pov2
+ 12,
7625 else if (this->target_
->use_32bit_micromips_instructions())
7627 // Write microMIPS PLT entry in insn32 mode.
7628 const uint32_t* plt_entry
= plt_entry_micromips32_o32
;
7630 elfcpp::Swap
<16, big_endian
>::writeval(pov2
, plt_entry
[0]);
7631 elfcpp::Swap
<16, big_endian
>::writeval(pov2
+ 2,
7632 gotplt_entry_addr_hi
);
7633 elfcpp::Swap
<16, big_endian
>::writeval(pov2
+ 4, plt_entry
[2]);
7634 elfcpp::Swap
<16, big_endian
>::writeval(pov2
+ 6,
7635 gotplt_entry_addr_lo
);
7636 elfcpp::Swap
<16, big_endian
>::writeval(pov2
+ 8, plt_entry
[4]);
7637 elfcpp::Swap
<16, big_endian
>::writeval(pov2
+ 10, plt_entry
[5]);
7638 elfcpp::Swap
<16, big_endian
>::writeval(pov2
+ 12, plt_entry
[6]);
7639 elfcpp::Swap
<16, big_endian
>::writeval(pov2
+ 14,
7640 gotplt_entry_addr_lo
);
7645 // Write microMIPS PLT entry.
7646 const uint32_t* plt_entry
= plt_entry_micromips_o32
;
7648 gold_assert(gotplt_entry_addr
% 4 == 0);
7650 Mips_address loc_address
= plt_address
+ pov2
- oview
;
7651 int gotpc_offset
= gotplt_entry_addr
- ((loc_address
| 3) ^ 3);
7653 // ADDIUPC has a span of +/-16MB, check we're in range.
7654 if (gotpc_offset
+ 0x1000000 >= 0x2000000)
7656 gold_error(_(".got.plt offset of %ld from .plt beyond the "
7657 "range of ADDIUPC"), (long)gotpc_offset
);
7661 elfcpp::Swap
<16, big_endian
>::writeval(pov2
,
7662 plt_entry
[0] | ((gotpc_offset
>> 18) & 0x7f));
7663 elfcpp::Swap
<16, big_endian
>::writeval(
7664 pov2
+ 2, (gotpc_offset
>> 2) & 0xffff);
7665 elfcpp::Swap
<16, big_endian
>::writeval(pov2
+ 4, plt_entry
[2]);
7666 elfcpp::Swap
<16, big_endian
>::writeval(pov2
+ 6, plt_entry
[3]);
7667 elfcpp::Swap
<16, big_endian
>::writeval(pov2
+ 8, plt_entry
[4]);
7668 elfcpp::Swap
<16, big_endian
>::writeval(pov2
+ 10, plt_entry
[5]);
7674 // Check the number of bytes written for standard entries.
7675 gold_assert(static_cast<section_size_type
>(
7676 pov
- oview
- this->plt_header_size_
) == this->plt_mips_offset_
);
7677 // Check the number of bytes written for compressed entries.
7678 gold_assert((static_cast<section_size_type
>(pov2
- pov
)
7679 == this->plt_comp_offset_
));
7680 // Check the total number of bytes written.
7681 gold_assert(static_cast<section_size_type
>(pov2
- oview
) == oview_size
);
7683 gold_assert(static_cast<section_size_type
>(gotplt_pov
- gotplt_view
)
7686 of
->write_output_view(offset
, oview_size
, oview
);
7687 of
->write_output_view(gotplt_file_offset
, gotplt_size
, gotplt_view
);
7690 // Mips_output_data_mips_stubs methods.
7692 // The format of the lazy binding stub when dynamic symbol count is less than
7693 // 64K, dynamic symbol index is less than 32K, and ABI is not N64.
7694 template<int size
, bool big_endian
>
7696 Mips_output_data_mips_stubs
<size
, big_endian
>::lazy_stub_normal_1
[4] =
7698 0x8f998010, // lw t9,0x8010(gp)
7699 0x03e07825, // or t7,ra,zero
7700 0x0320f809, // jalr t9,ra
7701 0x24180000 // addiu t8,zero,DYN_INDEX sign extended
7704 // The format of the lazy binding stub when dynamic symbol count is less than
7705 // 64K, dynamic symbol index is less than 32K, and ABI is N64.
7706 template<int size
, bool big_endian
>
7708 Mips_output_data_mips_stubs
<size
, big_endian
>::lazy_stub_normal_1_n64
[4] =
7710 0xdf998010, // ld t9,0x8010(gp)
7711 0x03e07825, // or t7,ra,zero
7712 0x0320f809, // jalr t9,ra
7713 0x64180000 // daddiu t8,zero,DYN_INDEX sign extended
7716 // The format of the lazy binding stub when dynamic symbol count is less than
7717 // 64K, dynamic symbol index is between 32K and 64K, and ABI is not N64.
7718 template<int size
, bool big_endian
>
7720 Mips_output_data_mips_stubs
<size
, big_endian
>::lazy_stub_normal_2
[4] =
7722 0x8f998010, // lw t9,0x8010(gp)
7723 0x03e07825, // or t7,ra,zero
7724 0x0320f809, // jalr t9,ra
7725 0x34180000 // ori t8,zero,DYN_INDEX unsigned
7728 // The format of the lazy binding stub when dynamic symbol count is less than
7729 // 64K, dynamic symbol index is between 32K and 64K, and ABI is N64.
7730 template<int size
, bool big_endian
>
7732 Mips_output_data_mips_stubs
<size
, big_endian
>::lazy_stub_normal_2_n64
[4] =
7734 0xdf998010, // ld t9,0x8010(gp)
7735 0x03e07825, // or t7,ra,zero
7736 0x0320f809, // jalr t9,ra
7737 0x34180000 // ori t8,zero,DYN_INDEX unsigned
7740 // The format of the lazy binding stub when dynamic symbol count is greater than
7741 // 64K, and ABI is not N64.
7742 template<int size
, bool big_endian
>
7743 const uint32_t Mips_output_data_mips_stubs
<size
, big_endian
>::lazy_stub_big
[5] =
7745 0x8f998010, // lw t9,0x8010(gp)
7746 0x03e07825, // or t7,ra,zero
7747 0x3c180000, // lui t8,DYN_INDEX
7748 0x0320f809, // jalr t9,ra
7749 0x37180000 // ori t8,t8,DYN_INDEX
7752 // The format of the lazy binding stub when dynamic symbol count is greater than
7753 // 64K, and ABI is N64.
7754 template<int size
, bool big_endian
>
7756 Mips_output_data_mips_stubs
<size
, big_endian
>::lazy_stub_big_n64
[5] =
7758 0xdf998010, // ld t9,0x8010(gp)
7759 0x03e07825, // or t7,ra,zero
7760 0x3c180000, // lui t8,DYN_INDEX
7761 0x0320f809, // jalr t9,ra
7762 0x37180000 // ori t8,t8,DYN_INDEX
7767 // The format of the microMIPS lazy binding stub when dynamic symbol count is
7768 // less than 64K, dynamic symbol index is less than 32K, and ABI is not N64.
7769 template<int size
, bool big_endian
>
7771 Mips_output_data_mips_stubs
<size
, big_endian
>::lazy_stub_micromips_normal_1
[] =
7773 0xff3c, 0x8010, // lw t9,0x8010(gp)
7774 0x0dff, // move t7,ra
7776 0x3300, 0x0000 // addiu t8,zero,DYN_INDEX sign extended
7779 // The format of the microMIPS lazy binding stub when dynamic symbol count is
7780 // less than 64K, dynamic symbol index is less than 32K, and ABI is N64.
7781 template<int size
, bool big_endian
>
7783 Mips_output_data_mips_stubs
<size
, big_endian
>::
7784 lazy_stub_micromips_normal_1_n64
[] =
7786 0xdf3c, 0x8010, // ld t9,0x8010(gp)
7787 0x0dff, // move t7,ra
7789 0x5f00, 0x0000 // daddiu t8,zero,DYN_INDEX sign extended
7792 // The format of the microMIPS lazy binding stub when dynamic symbol
7793 // count is less than 64K, dynamic symbol index is between 32K and 64K,
7794 // and ABI is not N64.
7795 template<int size
, bool big_endian
>
7797 Mips_output_data_mips_stubs
<size
, big_endian
>::lazy_stub_micromips_normal_2
[] =
7799 0xff3c, 0x8010, // lw t9,0x8010(gp)
7800 0x0dff, // move t7,ra
7802 0x5300, 0x0000 // ori t8,zero,DYN_INDEX unsigned
7805 // The format of the microMIPS lazy binding stub when dynamic symbol
7806 // count is less than 64K, dynamic symbol index is between 32K and 64K,
7808 template<int size
, bool big_endian
>
7810 Mips_output_data_mips_stubs
<size
, big_endian
>::
7811 lazy_stub_micromips_normal_2_n64
[] =
7813 0xdf3c, 0x8010, // ld t9,0x8010(gp)
7814 0x0dff, // move t7,ra
7816 0x5300, 0x0000 // ori t8,zero,DYN_INDEX unsigned
7819 // The format of the microMIPS lazy binding stub when dynamic symbol count is
7820 // greater than 64K, and ABI is not N64.
7821 template<int size
, bool big_endian
>
7823 Mips_output_data_mips_stubs
<size
, big_endian
>::lazy_stub_micromips_big
[] =
7825 0xff3c, 0x8010, // lw t9,0x8010(gp)
7826 0x0dff, // move t7,ra
7827 0x41b8, 0x0000, // lui t8,DYN_INDEX
7829 0x5318, 0x0000 // ori t8,t8,DYN_INDEX
7832 // The format of the microMIPS lazy binding stub when dynamic symbol count is
7833 // greater than 64K, and ABI is N64.
7834 template<int size
, bool big_endian
>
7836 Mips_output_data_mips_stubs
<size
, big_endian
>::lazy_stub_micromips_big_n64
[] =
7838 0xdf3c, 0x8010, // ld t9,0x8010(gp)
7839 0x0dff, // move t7,ra
7840 0x41b8, 0x0000, // lui t8,DYN_INDEX
7842 0x5318, 0x0000 // ori t8,t8,DYN_INDEX
7845 // 32-bit microMIPS stubs.
7847 // The format of the microMIPS lazy binding stub when dynamic symbol count is
7848 // less than 64K, dynamic symbol index is less than 32K, ABI is not N64, and we
7849 // can use only 32-bit instructions.
7850 template<int size
, bool big_endian
>
7852 Mips_output_data_mips_stubs
<size
, big_endian
>::
7853 lazy_stub_micromips32_normal_1
[] =
7855 0xff3c, 0x8010, // lw t9,0x8010(gp)
7856 0x001f, 0x7a90, // or t7,ra,zero
7857 0x03f9, 0x0f3c, // jalr ra,t9
7858 0x3300, 0x0000 // addiu t8,zero,DYN_INDEX sign extended
7861 // The format of the microMIPS lazy binding stub when dynamic symbol count is
7862 // less than 64K, dynamic symbol index is less than 32K, ABI is N64, and we can
7863 // use only 32-bit instructions.
7864 template<int size
, bool big_endian
>
7866 Mips_output_data_mips_stubs
<size
, big_endian
>::
7867 lazy_stub_micromips32_normal_1_n64
[] =
7869 0xdf3c, 0x8010, // ld t9,0x8010(gp)
7870 0x001f, 0x7a90, // or t7,ra,zero
7871 0x03f9, 0x0f3c, // jalr ra,t9
7872 0x5f00, 0x0000 // daddiu t8,zero,DYN_INDEX sign extended
7875 // The format of the microMIPS lazy binding stub when dynamic symbol
7876 // count is less than 64K, dynamic symbol index is between 32K and 64K,
7877 // ABI is not N64, and we can use only 32-bit instructions.
7878 template<int size
, bool big_endian
>
7880 Mips_output_data_mips_stubs
<size
, big_endian
>::
7881 lazy_stub_micromips32_normal_2
[] =
7883 0xff3c, 0x8010, // lw t9,0x8010(gp)
7884 0x001f, 0x7a90, // or t7,ra,zero
7885 0x03f9, 0x0f3c, // jalr ra,t9
7886 0x5300, 0x0000 // ori t8,zero,DYN_INDEX unsigned
7889 // The format of the microMIPS lazy binding stub when dynamic symbol
7890 // count is less than 64K, dynamic symbol index is between 32K and 64K,
7891 // ABI is N64, and we can use only 32-bit instructions.
7892 template<int size
, bool big_endian
>
7894 Mips_output_data_mips_stubs
<size
, big_endian
>::
7895 lazy_stub_micromips32_normal_2_n64
[] =
7897 0xdf3c, 0x8010, // ld t9,0x8010(gp)
7898 0x001f, 0x7a90, // or t7,ra,zero
7899 0x03f9, 0x0f3c, // jalr ra,t9
7900 0x5300, 0x0000 // ori t8,zero,DYN_INDEX unsigned
7903 // The format of the microMIPS lazy binding stub when dynamic symbol count is
7904 // greater than 64K, ABI is not N64, and we can use only 32-bit instructions.
7905 template<int size
, bool big_endian
>
7907 Mips_output_data_mips_stubs
<size
, big_endian
>::lazy_stub_micromips32_big
[] =
7909 0xff3c, 0x8010, // lw t9,0x8010(gp)
7910 0x001f, 0x7a90, // or t7,ra,zero
7911 0x41b8, 0x0000, // lui t8,DYN_INDEX
7912 0x03f9, 0x0f3c, // jalr ra,t9
7913 0x5318, 0x0000 // ori t8,t8,DYN_INDEX
7916 // The format of the microMIPS lazy binding stub when dynamic symbol count is
7917 // greater than 64K, ABI is N64, and we can use only 32-bit instructions.
7918 template<int size
, bool big_endian
>
7920 Mips_output_data_mips_stubs
<size
, big_endian
>::lazy_stub_micromips32_big_n64
[] =
7922 0xdf3c, 0x8010, // ld t9,0x8010(gp)
7923 0x001f, 0x7a90, // or t7,ra,zero
7924 0x41b8, 0x0000, // lui t8,DYN_INDEX
7925 0x03f9, 0x0f3c, // jalr ra,t9
7926 0x5318, 0x0000 // ori t8,t8,DYN_INDEX
7929 // Create entry for a symbol.
7931 template<int size
, bool big_endian
>
7933 Mips_output_data_mips_stubs
<size
, big_endian
>::make_entry(
7934 Mips_symbol
<size
>* gsym
)
7936 if (!gsym
->has_lazy_stub() && !gsym
->has_plt_offset())
7938 this->symbols_
.insert(gsym
);
7939 gsym
->set_has_lazy_stub(true);
7943 // Remove entry for a symbol.
7945 template<int size
, bool big_endian
>
7947 Mips_output_data_mips_stubs
<size
, big_endian
>::remove_entry(
7948 Mips_symbol
<size
>* gsym
)
7950 if (gsym
->has_lazy_stub())
7952 this->symbols_
.erase(gsym
);
7953 gsym
->set_has_lazy_stub(false);
7957 // Set stub offsets for symbols. This method expects that the number of
7958 // entries in dynamic symbol table is set.
7960 template<int size
, bool big_endian
>
7962 Mips_output_data_mips_stubs
<size
, big_endian
>::set_lazy_stub_offsets()
7964 gold_assert(this->dynsym_count_
!= -1U);
7966 if (this->stub_offsets_are_set_
)
7969 unsigned int stub_size
= this->stub_size();
7970 unsigned int offset
= 0;
7971 for (typename
Mips_stubs_entry_set::const_iterator
7972 p
= this->symbols_
.begin();
7973 p
!= this->symbols_
.end();
7974 ++p
, offset
+= stub_size
)
7976 Mips_symbol
<size
>* mips_sym
= *p
;
7977 mips_sym
->set_lazy_stub_offset(offset
);
7979 this->stub_offsets_are_set_
= true;
7982 template<int size
, bool big_endian
>
7984 Mips_output_data_mips_stubs
<size
, big_endian
>::set_needs_dynsym_value()
7986 for (typename
Mips_stubs_entry_set::const_iterator
7987 p
= this->symbols_
.begin(); p
!= this->symbols_
.end(); ++p
)
7989 Mips_symbol
<size
>* sym
= *p
;
7990 if (sym
->is_from_dynobj())
7991 sym
->set_needs_dynsym_value();
7995 // Write out the .MIPS.stubs. This uses the hand-coded instructions and
7996 // adjusts them as needed.
7998 template<int size
, bool big_endian
>
8000 Mips_output_data_mips_stubs
<size
, big_endian
>::do_write(Output_file
* of
)
8002 const off_t offset
= this->offset();
8003 const section_size_type oview_size
=
8004 convert_to_section_size_type(this->data_size());
8005 unsigned char* const oview
= of
->get_output_view(offset
, oview_size
);
8007 bool big_stub
= this->dynsym_count_
> 0x10000;
8009 unsigned char* pov
= oview
;
8010 for (typename
Mips_stubs_entry_set::const_iterator
8011 p
= this->symbols_
.begin(); p
!= this->symbols_
.end(); ++p
)
8013 Mips_symbol
<size
>* sym
= *p
;
8014 const uint32_t* lazy_stub
;
8015 bool n64
= this->target_
->is_output_n64();
8017 if (!this->target_
->is_output_micromips())
8019 // Write standard (non-microMIPS) stub.
8022 if (sym
->dynsym_index() & ~0x7fff)
8023 // Dynsym index is between 32K and 64K.
8024 lazy_stub
= n64
? lazy_stub_normal_2_n64
: lazy_stub_normal_2
;
8026 // Dynsym index is less than 32K.
8027 lazy_stub
= n64
? lazy_stub_normal_1_n64
: lazy_stub_normal_1
;
8030 lazy_stub
= n64
? lazy_stub_big_n64
: lazy_stub_big
;
8033 elfcpp::Swap
<32, big_endian
>::writeval(pov
, lazy_stub
[i
]);
8034 elfcpp::Swap
<32, big_endian
>::writeval(pov
+ 4, lazy_stub
[i
+ 1]);
8040 // LUI instruction of the big stub. Paste high 16 bits of the
8042 elfcpp::Swap
<32, big_endian
>::writeval(pov
,
8043 lazy_stub
[i
] | ((sym
->dynsym_index() >> 16) & 0x7fff));
8047 elfcpp::Swap
<32, big_endian
>::writeval(pov
, lazy_stub
[i
]);
8048 // Last stub instruction. Paste low 16 bits of the dynsym index.
8049 elfcpp::Swap
<32, big_endian
>::writeval(pov
+ 4,
8050 lazy_stub
[i
+ 1] | (sym
->dynsym_index() & 0xffff));
8053 else if (this->target_
->use_32bit_micromips_instructions())
8055 // Write microMIPS stub in insn32 mode.
8058 if (sym
->dynsym_index() & ~0x7fff)
8059 // Dynsym index is between 32K and 64K.
8060 lazy_stub
= n64
? lazy_stub_micromips32_normal_2_n64
8061 : lazy_stub_micromips32_normal_2
;
8063 // Dynsym index is less than 32K.
8064 lazy_stub
= n64
? lazy_stub_micromips32_normal_1_n64
8065 : lazy_stub_micromips32_normal_1
;
8068 lazy_stub
= n64
? lazy_stub_micromips32_big_n64
8069 : lazy_stub_micromips32_big
;
8072 // First stub instruction. We emit 32-bit microMIPS instructions by
8073 // emitting two 16-bit parts because on microMIPS the 16-bit part of
8074 // the instruction where the opcode is must always come first, for
8075 // both little and big endian.
8076 elfcpp::Swap
<16, big_endian
>::writeval(pov
, lazy_stub
[i
]);
8077 elfcpp::Swap
<16, big_endian
>::writeval(pov
+ 2, lazy_stub
[i
+ 1]);
8078 // Second stub instruction.
8079 elfcpp::Swap
<16, big_endian
>::writeval(pov
+ 4, lazy_stub
[i
+ 2]);
8080 elfcpp::Swap
<16, big_endian
>::writeval(pov
+ 6, lazy_stub
[i
+ 3]);
8085 // LUI instruction of the big stub. Paste high 16 bits of the
8087 elfcpp::Swap
<16, big_endian
>::writeval(pov
, lazy_stub
[i
]);
8088 elfcpp::Swap
<16, big_endian
>::writeval(pov
+ 2,
8089 (sym
->dynsym_index() >> 16) & 0x7fff);
8093 elfcpp::Swap
<16, big_endian
>::writeval(pov
, lazy_stub
[i
]);
8094 elfcpp::Swap
<16, big_endian
>::writeval(pov
+ 2, lazy_stub
[i
+ 1]);
8095 // Last stub instruction. Paste low 16 bits of the dynsym index.
8096 elfcpp::Swap
<16, big_endian
>::writeval(pov
+ 4, lazy_stub
[i
+ 2]);
8097 elfcpp::Swap
<16, big_endian
>::writeval(pov
+ 6,
8098 sym
->dynsym_index() & 0xffff);
8103 // Write microMIPS stub.
8106 if (sym
->dynsym_index() & ~0x7fff)
8107 // Dynsym index is between 32K and 64K.
8108 lazy_stub
= n64
? lazy_stub_micromips_normal_2_n64
8109 : lazy_stub_micromips_normal_2
;
8111 // Dynsym index is less than 32K.
8112 lazy_stub
= n64
? lazy_stub_micromips_normal_1_n64
8113 : lazy_stub_micromips_normal_1
;
8116 lazy_stub
= n64
? lazy_stub_micromips_big_n64
8117 : lazy_stub_micromips_big
;
8120 // First stub instruction. We emit 32-bit microMIPS instructions by
8121 // emitting two 16-bit parts because on microMIPS the 16-bit part of
8122 // the instruction where the opcode is must always come first, for
8123 // both little and big endian.
8124 elfcpp::Swap
<16, big_endian
>::writeval(pov
, lazy_stub
[i
]);
8125 elfcpp::Swap
<16, big_endian
>::writeval(pov
+ 2, lazy_stub
[i
+ 1]);
8126 // Second stub instruction.
8127 elfcpp::Swap
<16, big_endian
>::writeval(pov
+ 4, lazy_stub
[i
+ 2]);
8132 // LUI instruction of the big stub. Paste high 16 bits of the
8134 elfcpp::Swap
<16, big_endian
>::writeval(pov
, lazy_stub
[i
]);
8135 elfcpp::Swap
<16, big_endian
>::writeval(pov
+ 2,
8136 (sym
->dynsym_index() >> 16) & 0x7fff);
8140 elfcpp::Swap
<16, big_endian
>::writeval(pov
, lazy_stub
[i
]);
8141 // Last stub instruction. Paste low 16 bits of the dynsym index.
8142 elfcpp::Swap
<16, big_endian
>::writeval(pov
+ 2, lazy_stub
[i
+ 1]);
8143 elfcpp::Swap
<16, big_endian
>::writeval(pov
+ 4,
8144 sym
->dynsym_index() & 0xffff);
8149 // We always allocate 20 bytes for every stub, because final dynsym count is
8150 // not known in method do_finalize_sections. There are 4 unused bytes per
8151 // stub if final dynsym count is less than 0x10000.
8152 unsigned int used
= pov
- oview
;
8153 unsigned int unused
= big_stub
? 0 : this->symbols_
.size() * 4;
8154 gold_assert(static_cast<section_size_type
>(used
+ unused
) == oview_size
);
8156 // Fill the unused space with zeroes.
8157 // TODO(sasa): Can we strip unused bytes during the relaxation?
8159 memset(pov
, 0, unused
);
8161 of
->write_output_view(offset
, oview_size
, oview
);
8164 // Mips_output_section_reginfo methods.
8166 template<int size
, bool big_endian
>
8168 Mips_output_section_reginfo
<size
, big_endian
>::do_write(Output_file
* of
)
8170 off_t offset
= this->offset();
8171 off_t data_size
= this->data_size();
8173 unsigned char* view
= of
->get_output_view(offset
, data_size
);
8174 elfcpp::Swap
<size
, big_endian
>::writeval(view
, this->gprmask_
);
8175 elfcpp::Swap
<size
, big_endian
>::writeval(view
+ 4, this->cprmask1_
);
8176 elfcpp::Swap
<size
, big_endian
>::writeval(view
+ 8, this->cprmask2_
);
8177 elfcpp::Swap
<size
, big_endian
>::writeval(view
+ 12, this->cprmask3_
);
8178 elfcpp::Swap
<size
, big_endian
>::writeval(view
+ 16, this->cprmask4_
);
8179 // Write the gp value.
8180 elfcpp::Swap
<size
, big_endian
>::writeval(view
+ 20,
8181 this->target_
->gp_value());
8183 of
->write_output_view(offset
, data_size
, view
);
8186 // Mips_output_section_abiflags methods.
8188 template<int size
, bool big_endian
>
8190 Mips_output_section_abiflags
<size
, big_endian
>::do_write(Output_file
* of
)
8192 off_t offset
= this->offset();
8193 off_t data_size
= this->data_size();
8195 unsigned char* view
= of
->get_output_view(offset
, data_size
);
8196 elfcpp::Swap
<16, big_endian
>::writeval(view
, this->abiflags_
.version
);
8197 elfcpp::Swap
<8, big_endian
>::writeval(view
+ 2, this->abiflags_
.isa_level
);
8198 elfcpp::Swap
<8, big_endian
>::writeval(view
+ 3, this->abiflags_
.isa_rev
);
8199 elfcpp::Swap
<8, big_endian
>::writeval(view
+ 4, this->abiflags_
.gpr_size
);
8200 elfcpp::Swap
<8, big_endian
>::writeval(view
+ 5, this->abiflags_
.cpr1_size
);
8201 elfcpp::Swap
<8, big_endian
>::writeval(view
+ 6, this->abiflags_
.cpr2_size
);
8202 elfcpp::Swap
<8, big_endian
>::writeval(view
+ 7, this->abiflags_
.fp_abi
);
8203 elfcpp::Swap
<32, big_endian
>::writeval(view
+ 8, this->abiflags_
.isa_ext
);
8204 elfcpp::Swap
<32, big_endian
>::writeval(view
+ 12, this->abiflags_
.ases
);
8205 elfcpp::Swap
<32, big_endian
>::writeval(view
+ 16, this->abiflags_
.flags1
);
8206 elfcpp::Swap
<32, big_endian
>::writeval(view
+ 20, this->abiflags_
.flags2
);
8208 of
->write_output_view(offset
, data_size
, view
);
8211 // Mips_copy_relocs methods.
8213 // Emit any saved relocs.
8215 template<int sh_type
, int size
, bool big_endian
>
8217 Mips_copy_relocs
<sh_type
, size
, big_endian
>::emit_mips(
8218 Output_data_reloc
<sh_type
, true, size
, big_endian
>* reloc_section
,
8219 Symbol_table
* symtab
, Layout
* layout
, Target_mips
<size
, big_endian
>* target
)
8221 for (typename Copy_relocs
<sh_type
, size
, big_endian
>::
8222 Copy_reloc_entries::iterator p
= this->entries_
.begin();
8223 p
!= this->entries_
.end();
8225 emit_entry(*p
, reloc_section
, symtab
, layout
, target
);
8227 // We no longer need the saved information.
8228 this->entries_
.clear();
8231 // Emit the reloc if appropriate.
8233 template<int sh_type
, int size
, bool big_endian
>
8235 Mips_copy_relocs
<sh_type
, size
, big_endian
>::emit_entry(
8236 Copy_reloc_entry
& entry
,
8237 Output_data_reloc
<sh_type
, true, size
, big_endian
>* reloc_section
,
8238 Symbol_table
* symtab
, Layout
* layout
, Target_mips
<size
, big_endian
>* target
)
8240 // If the symbol is no longer defined in a dynamic object, then we
8241 // emitted a COPY relocation, and we do not want to emit this
8242 // dynamic relocation.
8243 if (!entry
.sym_
->is_from_dynobj())
8246 bool can_make_dynamic
= (entry
.reloc_type_
== elfcpp::R_MIPS_32
8247 || entry
.reloc_type_
== elfcpp::R_MIPS_REL32
8248 || entry
.reloc_type_
== elfcpp::R_MIPS_64
);
8250 Mips_symbol
<size
>* sym
= Mips_symbol
<size
>::as_mips_sym(entry
.sym_
);
8251 if (can_make_dynamic
&& !sym
->has_static_relocs())
8253 Mips_relobj
<size
, big_endian
>* object
=
8254 Mips_relobj
<size
, big_endian
>::as_mips_relobj(entry
.relobj_
);
8255 target
->got_section(symtab
, layout
)->record_global_got_symbol(
8256 sym
, object
, entry
.reloc_type_
, true, false);
8257 if (!symbol_references_local(sym
, sym
->should_add_dynsym_entry(symtab
)))
8258 target
->rel_dyn_section(layout
)->add_global(sym
, elfcpp::R_MIPS_REL32
,
8259 entry
.output_section_
, entry
.relobj_
, entry
.shndx_
, entry
.address_
);
8261 target
->rel_dyn_section(layout
)->add_symbolless_global_addend(
8262 sym
, elfcpp::R_MIPS_REL32
, entry
.output_section_
, entry
.relobj_
,
8263 entry
.shndx_
, entry
.address_
);
8266 this->make_copy_reloc(symtab
, layout
,
8267 static_cast<Sized_symbol
<size
>*>(entry
.sym_
),
8272 // Target_mips methods.
8274 // Return the value to use for a dynamic symbol which requires special
8275 // treatment. This is how we support equality comparisons of function
8276 // pointers across shared library boundaries, as described in the
8277 // processor specific ABI supplement.
8279 template<int size
, bool big_endian
>
8281 Target_mips
<size
, big_endian
>::do_dynsym_value(const Symbol
* gsym
) const
8284 const Mips_symbol
<size
>* mips_sym
= Mips_symbol
<size
>::as_mips_sym(gsym
);
8286 if (!mips_sym
->has_lazy_stub())
8288 if (mips_sym
->has_plt_offset())
8290 // We distinguish between PLT entries and lazy-binding stubs by
8291 // giving the former an st_other value of STO_MIPS_PLT. Set the
8292 // value to the stub address if there are any relocations in the
8293 // binary where pointer equality matters.
8294 if (mips_sym
->pointer_equality_needed())
8296 // Prefer a standard MIPS PLT entry.
8297 if (mips_sym
->has_mips_plt_offset())
8298 value
= this->plt_section()->mips_entry_address(mips_sym
);
8300 value
= this->plt_section()->comp_entry_address(mips_sym
) + 1;
8308 // First, set stub offsets for symbols. This method expects that the
8309 // number of entries in dynamic symbol table is set.
8310 this->mips_stubs_section()->set_lazy_stub_offsets();
8312 // The run-time linker uses the st_value field of the symbol
8313 // to reset the global offset table entry for this external
8314 // to its stub address when unlinking a shared object.
8315 value
= this->mips_stubs_section()->stub_address(mips_sym
);
8318 if (mips_sym
->has_mips16_fn_stub())
8320 // If we have a MIPS16 function with a stub, the dynamic symbol must
8321 // refer to the stub, since only the stub uses the standard calling
8323 value
= mips_sym
->template
8324 get_mips16_fn_stub
<big_endian
>()->output_address();
8330 // Get the dynamic reloc section, creating it if necessary. It's always
8331 // .rel.dyn, even for MIPS64.
8333 template<int size
, bool big_endian
>
8334 typename Target_mips
<size
, big_endian
>::Reloc_section
*
8335 Target_mips
<size
, big_endian
>::rel_dyn_section(Layout
* layout
)
8337 if (this->rel_dyn_
== NULL
)
8339 gold_assert(layout
!= NULL
);
8340 this->rel_dyn_
= new Reloc_section(parameters
->options().combreloc());
8341 layout
->add_output_section_data(".rel.dyn", elfcpp::SHT_REL
,
8342 elfcpp::SHF_ALLOC
, this->rel_dyn_
,
8343 ORDER_DYNAMIC_RELOCS
, false);
8345 // First entry in .rel.dyn has to be null.
8346 // This is hack - we define dummy output data and set its address to 0,
8347 // and define absolute R_MIPS_NONE relocation with offset 0 against it.
8348 // This ensures that the entry is null.
8349 Output_data
* od
= new Output_data_zero_fill(0, 0);
8351 this->rel_dyn_
->add_absolute(elfcpp::R_MIPS_NONE
, od
, 0);
8353 return this->rel_dyn_
;
8356 // Get the GOT section, creating it if necessary.
8358 template<int size
, bool big_endian
>
8359 Mips_output_data_got
<size
, big_endian
>*
8360 Target_mips
<size
, big_endian
>::got_section(Symbol_table
* symtab
,
8363 if (this->got_
== NULL
)
8365 gold_assert(symtab
!= NULL
&& layout
!= NULL
);
8367 this->got_
= new Mips_output_data_got
<size
, big_endian
>(this, symtab
,
8369 layout
->add_output_section_data(".got", elfcpp::SHT_PROGBITS
,
8370 (elfcpp::SHF_ALLOC
| elfcpp::SHF_WRITE
|
8371 elfcpp::SHF_MIPS_GPREL
),
8372 this->got_
, ORDER_DATA
, false);
8374 // Define _GLOBAL_OFFSET_TABLE_ at the start of the .got section.
8375 symtab
->define_in_output_data("_GLOBAL_OFFSET_TABLE_", NULL
,
8376 Symbol_table::PREDEFINED
,
8378 0, 0, elfcpp::STT_OBJECT
,
8380 elfcpp::STV_HIDDEN
, 0,
8387 // Calculate value of _gp symbol.
8389 template<int size
, bool big_endian
>
8391 Target_mips
<size
, big_endian
>::set_gp(Layout
* layout
, Symbol_table
* symtab
)
8393 gold_assert(this->gp_
== NULL
);
8395 Sized_symbol
<size
>* gp
=
8396 static_cast<Sized_symbol
<size
>*>(symtab
->lookup("_gp"));
8398 // Set _gp symbol if the linker script hasn't created it.
8399 if (gp
== NULL
|| gp
->source() != Symbol::IS_CONSTANT
)
8401 // If there is no .got section, gp should be based on .sdata.
8402 Output_data
* gp_section
= (this->got_
!= NULL
8403 ? this->got_
->output_section()
8404 : layout
->find_output_section(".sdata"));
8406 if (gp_section
!= NULL
)
8407 gp
= static_cast<Sized_symbol
<size
>*>(symtab
->define_in_output_data(
8408 "_gp", NULL
, Symbol_table::PREDEFINED
,
8409 gp_section
, MIPS_GP_OFFSET
, 0,
8412 elfcpp::STV_DEFAULT
,
8419 // Set the dynamic symbol indexes. INDEX is the index of the first
8420 // global dynamic symbol. Pointers to the symbols are stored into the
8421 // vector SYMS. The names are added to DYNPOOL. This returns an
8422 // updated dynamic symbol index.
8424 template<int size
, bool big_endian
>
8426 Target_mips
<size
, big_endian
>::do_set_dynsym_indexes(
8427 std::vector
<Symbol
*>* dyn_symbols
, unsigned int index
,
8428 std::vector
<Symbol
*>* syms
, Stringpool
* dynpool
,
8429 Versions
* versions
, Symbol_table
* symtab
) const
8431 std::vector
<Symbol
*> non_got_symbols
;
8432 std::vector
<Symbol
*> got_symbols
;
8434 reorder_dyn_symbols
<size
, big_endian
>(dyn_symbols
, &non_got_symbols
,
8437 for (std::vector
<Symbol
*>::iterator p
= non_got_symbols
.begin();
8438 p
!= non_got_symbols
.end();
8443 // Note that SYM may already have a dynamic symbol index, since
8444 // some symbols appear more than once in the symbol table, with
8445 // and without a version.
8447 if (!sym
->has_dynsym_index())
8449 sym
->set_dynsym_index(index
);
8451 syms
->push_back(sym
);
8452 dynpool
->add(sym
->name(), false, NULL
);
8454 // Record any version information.
8455 if (sym
->version() != NULL
)
8456 versions
->record_version(symtab
, dynpool
, sym
);
8458 // If the symbol is defined in a dynamic object and is
8459 // referenced in a regular object, then mark the dynamic
8460 // object as needed. This is used to implement --as-needed.
8461 if (sym
->is_from_dynobj() && sym
->in_reg())
8462 sym
->object()->set_is_needed();
8466 for (std::vector
<Symbol
*>::iterator p
= got_symbols
.begin();
8467 p
!= got_symbols
.end();
8471 if (!sym
->has_dynsym_index())
8473 // Record any version information.
8474 if (sym
->version() != NULL
)
8475 versions
->record_version(symtab
, dynpool
, sym
);
8479 index
= versions
->finalize(symtab
, index
, syms
);
8481 int got_sym_count
= 0;
8482 for (std::vector
<Symbol
*>::iterator p
= got_symbols
.begin();
8483 p
!= got_symbols
.end();
8488 if (!sym
->has_dynsym_index())
8491 sym
->set_dynsym_index(index
);
8493 syms
->push_back(sym
);
8494 dynpool
->add(sym
->name(), false, NULL
);
8496 // If the symbol is defined in a dynamic object and is
8497 // referenced in a regular object, then mark the dynamic
8498 // object as needed. This is used to implement --as-needed.
8499 if (sym
->is_from_dynobj() && sym
->in_reg())
8500 sym
->object()->set_is_needed();
8504 // Set index of the first symbol that has .got entry.
8505 this->got_
->set_first_global_got_dynsym_index(
8506 got_sym_count
> 0 ? index
- got_sym_count
: -1U);
8508 if (this->mips_stubs_
!= NULL
)
8509 this->mips_stubs_
->set_dynsym_count(index
);
8514 // Create a PLT entry for a global symbol referenced by r_type relocation.
8516 template<int size
, bool big_endian
>
8518 Target_mips
<size
, big_endian
>::make_plt_entry(Symbol_table
* symtab
,
8520 Mips_symbol
<size
>* gsym
,
8521 unsigned int r_type
)
8523 if (gsym
->has_lazy_stub() || gsym
->has_plt_offset())
8526 if (this->plt_
== NULL
)
8528 // Create the GOT section first.
8529 this->got_section(symtab
, layout
);
8531 this->got_plt_
= new Output_data_space(4, "** GOT PLT");
8532 layout
->add_output_section_data(".got.plt", elfcpp::SHT_PROGBITS
,
8533 (elfcpp::SHF_ALLOC
| elfcpp::SHF_WRITE
),
8534 this->got_plt_
, ORDER_DATA
, false);
8536 // The first two entries are reserved.
8537 this->got_plt_
->set_current_data_size(2 * size
/8);
8539 this->plt_
= new Mips_output_data_plt
<size
, big_endian
>(layout
,
8542 layout
->add_output_section_data(".plt", elfcpp::SHT_PROGBITS
,
8544 | elfcpp::SHF_EXECINSTR
),
8545 this->plt_
, ORDER_PLT
, false);
8547 // Make the sh_info field of .rel.plt point to .plt.
8548 Output_section
* rel_plt_os
= this->plt_
->rel_plt()->output_section();
8549 rel_plt_os
->set_info_section(this->plt_
->output_section());
8552 this->plt_
->add_entry(gsym
, r_type
);
8556 // Get the .MIPS.stubs section, creating it if necessary.
8558 template<int size
, bool big_endian
>
8559 Mips_output_data_mips_stubs
<size
, big_endian
>*
8560 Target_mips
<size
, big_endian
>::mips_stubs_section(Layout
* layout
)
8562 if (this->mips_stubs_
== NULL
)
8565 new Mips_output_data_mips_stubs
<size
, big_endian
>(this);
8566 layout
->add_output_section_data(".MIPS.stubs", elfcpp::SHT_PROGBITS
,
8568 | elfcpp::SHF_EXECINSTR
),
8569 this->mips_stubs_
, ORDER_PLT
, false);
8571 return this->mips_stubs_
;
8574 // Get the LA25 stub section, creating it if necessary.
8576 template<int size
, bool big_endian
>
8577 Mips_output_data_la25_stub
<size
, big_endian
>*
8578 Target_mips
<size
, big_endian
>::la25_stub_section(Layout
* layout
)
8580 if (this->la25_stub_
== NULL
)
8582 this->la25_stub_
= new Mips_output_data_la25_stub
<size
, big_endian
>();
8583 layout
->add_output_section_data(".text", elfcpp::SHT_PROGBITS
,
8585 | elfcpp::SHF_EXECINSTR
),
8586 this->la25_stub_
, ORDER_TEXT
, false);
8588 return this->la25_stub_
;
8591 // Process the relocations to determine unreferenced sections for
8592 // garbage collection.
8594 template<int size
, bool big_endian
>
8596 Target_mips
<size
, big_endian
>::gc_process_relocs(
8597 Symbol_table
* symtab
,
8599 Sized_relobj_file
<size
, big_endian
>* object
,
8600 unsigned int data_shndx
,
8601 unsigned int sh_type
,
8602 const unsigned char* prelocs
,
8604 Output_section
* output_section
,
8605 bool needs_special_offset_handling
,
8606 size_t local_symbol_count
,
8607 const unsigned char* plocal_symbols
)
8609 typedef Target_mips
<size
, big_endian
> Mips
;
8611 if (sh_type
== elfcpp::SHT_REL
)
8613 typedef Mips_classify_reloc
<elfcpp::SHT_REL
, size
, big_endian
>
8616 gold::gc_process_relocs
<size
, big_endian
, Mips
, Scan
, Classify_reloc
>(
8625 needs_special_offset_handling
,
8629 else if (sh_type
== elfcpp::SHT_RELA
)
8631 typedef Mips_classify_reloc
<elfcpp::SHT_RELA
, size
, big_endian
>
8634 gold::gc_process_relocs
<size
, big_endian
, Mips
, Scan
, Classify_reloc
>(
8643 needs_special_offset_handling
,
8651 // Scan relocations for a section.
8653 template<int size
, bool big_endian
>
8655 Target_mips
<size
, big_endian
>::scan_relocs(
8656 Symbol_table
* symtab
,
8658 Sized_relobj_file
<size
, big_endian
>* object
,
8659 unsigned int data_shndx
,
8660 unsigned int sh_type
,
8661 const unsigned char* prelocs
,
8663 Output_section
* output_section
,
8664 bool needs_special_offset_handling
,
8665 size_t local_symbol_count
,
8666 const unsigned char* plocal_symbols
)
8668 typedef Target_mips
<size
, big_endian
> Mips
;
8670 if (sh_type
== elfcpp::SHT_REL
)
8672 typedef Mips_classify_reloc
<elfcpp::SHT_REL
, size
, big_endian
>
8675 gold::scan_relocs
<size
, big_endian
, Mips
, Scan
, Classify_reloc
>(
8684 needs_special_offset_handling
,
8688 else if (sh_type
== elfcpp::SHT_RELA
)
8690 typedef Mips_classify_reloc
<elfcpp::SHT_RELA
, size
, big_endian
>
8693 gold::scan_relocs
<size
, big_endian
, Mips
, Scan
, Classify_reloc
>(
8702 needs_special_offset_handling
,
8708 template<int size
, bool big_endian
>
8710 Target_mips
<size
, big_endian
>::mips_32bit_flags(elfcpp::Elf_Word flags
)
8712 return ((flags
& elfcpp::EF_MIPS_32BITMODE
) != 0
8713 || (flags
& elfcpp::EF_MIPS_ABI
) == elfcpp::E_MIPS_ABI_O32
8714 || (flags
& elfcpp::EF_MIPS_ABI
) == elfcpp::E_MIPS_ABI_EABI32
8715 || (flags
& elfcpp::EF_MIPS_ARCH
) == elfcpp::E_MIPS_ARCH_1
8716 || (flags
& elfcpp::EF_MIPS_ARCH
) == elfcpp::E_MIPS_ARCH_2
8717 || (flags
& elfcpp::EF_MIPS_ARCH
) == elfcpp::E_MIPS_ARCH_32
8718 || (flags
& elfcpp::EF_MIPS_ARCH
) == elfcpp::E_MIPS_ARCH_32R2
8719 || (flags
& elfcpp::EF_MIPS_ARCH
) == elfcpp::E_MIPS_ARCH_32R6
);
8722 // Return the MACH for a MIPS e_flags value.
8723 template<int size
, bool big_endian
>
8725 Target_mips
<size
, big_endian
>::elf_mips_mach(elfcpp::Elf_Word flags
)
8727 switch (flags
& elfcpp::EF_MIPS_MACH
)
8729 case elfcpp::E_MIPS_MACH_3900
:
8730 return mach_mips3900
;
8732 case elfcpp::E_MIPS_MACH_4010
:
8733 return mach_mips4010
;
8735 case elfcpp::E_MIPS_MACH_4100
:
8736 return mach_mips4100
;
8738 case elfcpp::E_MIPS_MACH_4111
:
8739 return mach_mips4111
;
8741 case elfcpp::E_MIPS_MACH_4120
:
8742 return mach_mips4120
;
8744 case elfcpp::E_MIPS_MACH_4650
:
8745 return mach_mips4650
;
8747 case elfcpp::E_MIPS_MACH_5400
:
8748 return mach_mips5400
;
8750 case elfcpp::E_MIPS_MACH_5500
:
8751 return mach_mips5500
;
8753 case elfcpp::E_MIPS_MACH_5900
:
8754 return mach_mips5900
;
8756 case elfcpp::E_MIPS_MACH_9000
:
8757 return mach_mips9000
;
8759 case elfcpp::E_MIPS_MACH_SB1
:
8760 return mach_mips_sb1
;
8762 case elfcpp::E_MIPS_MACH_LS2E
:
8763 return mach_mips_loongson_2e
;
8765 case elfcpp::E_MIPS_MACH_LS2F
:
8766 return mach_mips_loongson_2f
;
8768 case elfcpp::E_MIPS_MACH_LS3A
:
8769 return mach_mips_loongson_3a
;
8771 case elfcpp::E_MIPS_MACH_OCTEON3
:
8772 return mach_mips_octeon3
;
8774 case elfcpp::E_MIPS_MACH_OCTEON2
:
8775 return mach_mips_octeon2
;
8777 case elfcpp::E_MIPS_MACH_OCTEON
:
8778 return mach_mips_octeon
;
8780 case elfcpp::E_MIPS_MACH_XLR
:
8781 return mach_mips_xlr
;
8784 switch (flags
& elfcpp::EF_MIPS_ARCH
)
8787 case elfcpp::E_MIPS_ARCH_1
:
8788 return mach_mips3000
;
8790 case elfcpp::E_MIPS_ARCH_2
:
8791 return mach_mips6000
;
8793 case elfcpp::E_MIPS_ARCH_3
:
8794 return mach_mips4000
;
8796 case elfcpp::E_MIPS_ARCH_4
:
8797 return mach_mips8000
;
8799 case elfcpp::E_MIPS_ARCH_5
:
8802 case elfcpp::E_MIPS_ARCH_32
:
8803 return mach_mipsisa32
;
8805 case elfcpp::E_MIPS_ARCH_64
:
8806 return mach_mipsisa64
;
8808 case elfcpp::E_MIPS_ARCH_32R2
:
8809 return mach_mipsisa32r2
;
8811 case elfcpp::E_MIPS_ARCH_32R6
:
8812 return mach_mipsisa32r6
;
8814 case elfcpp::E_MIPS_ARCH_64R2
:
8815 return mach_mipsisa64r2
;
8817 case elfcpp::E_MIPS_ARCH_64R6
:
8818 return mach_mipsisa64r6
;
8825 // Return the MACH for each .MIPS.abiflags ISA Extension.
8827 template<int size
, bool big_endian
>
8829 Target_mips
<size
, big_endian
>::mips_isa_ext_mach(unsigned int isa_ext
)
8833 case elfcpp::AFL_EXT_3900
:
8834 return mach_mips3900
;
8836 case elfcpp::AFL_EXT_4010
:
8837 return mach_mips4010
;
8839 case elfcpp::AFL_EXT_4100
:
8840 return mach_mips4100
;
8842 case elfcpp::AFL_EXT_4111
:
8843 return mach_mips4111
;
8845 case elfcpp::AFL_EXT_4120
:
8846 return mach_mips4120
;
8848 case elfcpp::AFL_EXT_4650
:
8849 return mach_mips4650
;
8851 case elfcpp::AFL_EXT_5400
:
8852 return mach_mips5400
;
8854 case elfcpp::AFL_EXT_5500
:
8855 return mach_mips5500
;
8857 case elfcpp::AFL_EXT_5900
:
8858 return mach_mips5900
;
8860 case elfcpp::AFL_EXT_10000
:
8861 return mach_mips10000
;
8863 case elfcpp::AFL_EXT_LOONGSON_2E
:
8864 return mach_mips_loongson_2e
;
8866 case elfcpp::AFL_EXT_LOONGSON_2F
:
8867 return mach_mips_loongson_2f
;
8869 case elfcpp::AFL_EXT_LOONGSON_3A
:
8870 return mach_mips_loongson_3a
;
8872 case elfcpp::AFL_EXT_SB1
:
8873 return mach_mips_sb1
;
8875 case elfcpp::AFL_EXT_OCTEON
:
8876 return mach_mips_octeon
;
8878 case elfcpp::AFL_EXT_OCTEONP
:
8879 return mach_mips_octeonp
;
8881 case elfcpp::AFL_EXT_OCTEON2
:
8882 return mach_mips_octeon2
;
8884 case elfcpp::AFL_EXT_XLR
:
8885 return mach_mips_xlr
;
8888 return mach_mips3000
;
8892 // Return the .MIPS.abiflags value representing each ISA Extension.
8894 template<int size
, bool big_endian
>
8896 Target_mips
<size
, big_endian
>::mips_isa_ext(unsigned int mips_mach
)
8901 return elfcpp::AFL_EXT_3900
;
8904 return elfcpp::AFL_EXT_4010
;
8907 return elfcpp::AFL_EXT_4100
;
8910 return elfcpp::AFL_EXT_4111
;
8913 return elfcpp::AFL_EXT_4120
;
8916 return elfcpp::AFL_EXT_4650
;
8919 return elfcpp::AFL_EXT_5400
;
8922 return elfcpp::AFL_EXT_5500
;
8925 return elfcpp::AFL_EXT_5900
;
8927 case mach_mips10000
:
8928 return elfcpp::AFL_EXT_10000
;
8930 case mach_mips_loongson_2e
:
8931 return elfcpp::AFL_EXT_LOONGSON_2E
;
8933 case mach_mips_loongson_2f
:
8934 return elfcpp::AFL_EXT_LOONGSON_2F
;
8936 case mach_mips_loongson_3a
:
8937 return elfcpp::AFL_EXT_LOONGSON_3A
;
8940 return elfcpp::AFL_EXT_SB1
;
8942 case mach_mips_octeon
:
8943 return elfcpp::AFL_EXT_OCTEON
;
8945 case mach_mips_octeonp
:
8946 return elfcpp::AFL_EXT_OCTEONP
;
8948 case mach_mips_octeon3
:
8949 return elfcpp::AFL_EXT_OCTEON3
;
8951 case mach_mips_octeon2
:
8952 return elfcpp::AFL_EXT_OCTEON2
;
8955 return elfcpp::AFL_EXT_XLR
;
8962 // Update the isa_level, isa_rev, isa_ext fields of abiflags.
8964 template<int size
, bool big_endian
>
8966 Target_mips
<size
, big_endian
>::update_abiflags_isa(const std::string
& name
,
8967 elfcpp::Elf_Word e_flags
, Mips_abiflags
<big_endian
>* abiflags
)
8970 switch (e_flags
& elfcpp::EF_MIPS_ARCH
)
8972 case elfcpp::E_MIPS_ARCH_1
:
8973 new_isa
= this->level_rev(1, 0);
8975 case elfcpp::E_MIPS_ARCH_2
:
8976 new_isa
= this->level_rev(2, 0);
8978 case elfcpp::E_MIPS_ARCH_3
:
8979 new_isa
= this->level_rev(3, 0);
8981 case elfcpp::E_MIPS_ARCH_4
:
8982 new_isa
= this->level_rev(4, 0);
8984 case elfcpp::E_MIPS_ARCH_5
:
8985 new_isa
= this->level_rev(5, 0);
8987 case elfcpp::E_MIPS_ARCH_32
:
8988 new_isa
= this->level_rev(32, 1);
8990 case elfcpp::E_MIPS_ARCH_32R2
:
8991 new_isa
= this->level_rev(32, 2);
8993 case elfcpp::E_MIPS_ARCH_32R6
:
8994 new_isa
= this->level_rev(32, 6);
8996 case elfcpp::E_MIPS_ARCH_64
:
8997 new_isa
= this->level_rev(64, 1);
8999 case elfcpp::E_MIPS_ARCH_64R2
:
9000 new_isa
= this->level_rev(64, 2);
9002 case elfcpp::E_MIPS_ARCH_64R6
:
9003 new_isa
= this->level_rev(64, 6);
9006 gold_error(_("%s: Unknown architecture %s"), name
.c_str(),
9007 this->elf_mips_mach_name(e_flags
));
9010 if (new_isa
> this->level_rev(abiflags
->isa_level
, abiflags
->isa_rev
))
9012 // Decode a single value into level and revision.
9013 abiflags
->isa_level
= new_isa
>> 3;
9014 abiflags
->isa_rev
= new_isa
& 0x7;
9017 // Update the isa_ext if needed.
9018 if (this->mips_mach_extends(this->mips_isa_ext_mach(abiflags
->isa_ext
),
9019 this->elf_mips_mach(e_flags
)))
9020 abiflags
->isa_ext
= this->mips_isa_ext(this->elf_mips_mach(e_flags
));
9023 // Infer the content of the ABI flags based on the elf header.
9025 template<int size
, bool big_endian
>
9027 Target_mips
<size
, big_endian
>::infer_abiflags(
9028 Mips_relobj
<size
, big_endian
>* relobj
, Mips_abiflags
<big_endian
>* abiflags
)
9030 const Attributes_section_data
* pasd
= relobj
->attributes_section_data();
9031 int attr_fp_abi
= elfcpp::Val_GNU_MIPS_ABI_FP_ANY
;
9032 elfcpp::Elf_Word e_flags
= relobj
->processor_specific_flags();
9034 this->update_abiflags_isa(relobj
->name(), e_flags
, abiflags
);
9037 // Read fp_abi from the .gnu.attribute section.
9038 const Object_attribute
* attr
=
9039 pasd
->known_attributes(Object_attribute::OBJ_ATTR_GNU
);
9040 attr_fp_abi
= attr
[elfcpp::Tag_GNU_MIPS_ABI_FP
].int_value();
9043 abiflags
->fp_abi
= attr_fp_abi
;
9044 abiflags
->cpr1_size
= elfcpp::AFL_REG_NONE
;
9045 abiflags
->cpr2_size
= elfcpp::AFL_REG_NONE
;
9046 abiflags
->gpr_size
= this->mips_32bit_flags(e_flags
) ? elfcpp::AFL_REG_32
9047 : elfcpp::AFL_REG_64
;
9049 if (abiflags
->fp_abi
== elfcpp::Val_GNU_MIPS_ABI_FP_SINGLE
9050 || abiflags
->fp_abi
== elfcpp::Val_GNU_MIPS_ABI_FP_XX
9051 || (abiflags
->fp_abi
== elfcpp::Val_GNU_MIPS_ABI_FP_DOUBLE
9052 && abiflags
->gpr_size
== elfcpp::AFL_REG_32
))
9053 abiflags
->cpr1_size
= elfcpp::AFL_REG_32
;
9054 else if (abiflags
->fp_abi
== elfcpp::Val_GNU_MIPS_ABI_FP_DOUBLE
9055 || abiflags
->fp_abi
== elfcpp::Val_GNU_MIPS_ABI_FP_64
9056 || abiflags
->fp_abi
== elfcpp::Val_GNU_MIPS_ABI_FP_64A
)
9057 abiflags
->cpr1_size
= elfcpp::AFL_REG_64
;
9059 if (e_flags
& elfcpp::EF_MIPS_ARCH_ASE_MDMX
)
9060 abiflags
->ases
|= elfcpp::AFL_ASE_MDMX
;
9061 if (e_flags
& elfcpp::EF_MIPS_ARCH_ASE_M16
)
9062 abiflags
->ases
|= elfcpp::AFL_ASE_MIPS16
;
9063 if (e_flags
& elfcpp::EF_MIPS_ARCH_ASE_MICROMIPS
)
9064 abiflags
->ases
|= elfcpp::AFL_ASE_MICROMIPS
;
9066 if (abiflags
->fp_abi
!= elfcpp::Val_GNU_MIPS_ABI_FP_ANY
9067 && abiflags
->fp_abi
!= elfcpp::Val_GNU_MIPS_ABI_FP_SOFT
9068 && abiflags
->fp_abi
!= elfcpp::Val_GNU_MIPS_ABI_FP_64A
9069 && abiflags
->isa_level
>= 32
9070 && abiflags
->isa_ext
!= elfcpp::AFL_EXT_LOONGSON_3A
)
9071 abiflags
->flags1
|= elfcpp::AFL_FLAGS1_ODDSPREG
;
9074 // Create abiflags from elf header or from .MIPS.abiflags section.
9076 template<int size
, bool big_endian
>
9078 Target_mips
<size
, big_endian
>::create_abiflags(
9079 Mips_relobj
<size
, big_endian
>* relobj
,
9080 Mips_abiflags
<big_endian
>* abiflags
)
9082 Mips_abiflags
<big_endian
>* sec_abiflags
= relobj
->abiflags();
9083 Mips_abiflags
<big_endian
> header_abiflags
;
9085 this->infer_abiflags(relobj
, &header_abiflags
);
9087 if (sec_abiflags
== NULL
)
9089 // If there is no input .MIPS.abiflags section, use abiflags created
9091 *abiflags
= header_abiflags
;
9095 this->has_abiflags_section_
= true;
9097 // It is not possible to infer the correct ISA revision for R3 or R5
9098 // so drop down to R2 for the checks.
9099 unsigned char isa_rev
= sec_abiflags
->isa_rev
;
9100 if (isa_rev
== 3 || isa_rev
== 5)
9103 // Check compatibility between abiflags created from elf header
9104 // and abiflags from .MIPS.abiflags section in this object file.
9105 if (this->level_rev(sec_abiflags
->isa_level
, isa_rev
)
9106 < this->level_rev(header_abiflags
.isa_level
, header_abiflags
.isa_rev
))
9107 gold_warning(_("%s: Inconsistent ISA between e_flags and .MIPS.abiflags"),
9108 relobj
->name().c_str());
9109 if (header_abiflags
.fp_abi
!= elfcpp::Val_GNU_MIPS_ABI_FP_ANY
9110 && sec_abiflags
->fp_abi
!= header_abiflags
.fp_abi
)
9111 gold_warning(_("%s: Inconsistent FP ABI between .gnu.attributes and "
9112 ".MIPS.abiflags"), relobj
->name().c_str());
9113 if ((sec_abiflags
->ases
& header_abiflags
.ases
) != header_abiflags
.ases
)
9114 gold_warning(_("%s: Inconsistent ASEs between e_flags and .MIPS.abiflags"),
9115 relobj
->name().c_str());
9116 // The isa_ext is allowed to be an extension of what can be inferred
9118 if (!this->mips_mach_extends(this->mips_isa_ext_mach(header_abiflags
.isa_ext
),
9119 this->mips_isa_ext_mach(sec_abiflags
->isa_ext
)))
9120 gold_warning(_("%s: Inconsistent ISA extensions between e_flags and "
9121 ".MIPS.abiflags"), relobj
->name().c_str());
9122 if (sec_abiflags
->flags2
!= 0)
9123 gold_warning(_("%s: Unexpected flag in the flags2 field of "
9124 ".MIPS.abiflags (0x%x)"), relobj
->name().c_str(),
9125 sec_abiflags
->flags2
);
9126 // Use abiflags from .MIPS.abiflags section.
9127 *abiflags
= *sec_abiflags
;
9130 // Return the meaning of fp_abi, or "unknown" if not known.
9132 template<int size
, bool big_endian
>
9134 Target_mips
<size
, big_endian
>::fp_abi_string(int fp
)
9138 case elfcpp::Val_GNU_MIPS_ABI_FP_DOUBLE
:
9139 return "-mdouble-float";
9140 case elfcpp::Val_GNU_MIPS_ABI_FP_SINGLE
:
9141 return "-msingle-float";
9142 case elfcpp::Val_GNU_MIPS_ABI_FP_SOFT
:
9143 return "-msoft-float";
9144 case elfcpp::Val_GNU_MIPS_ABI_FP_OLD_64
:
9145 return _("-mips32r2 -mfp64 (12 callee-saved)");
9146 case elfcpp::Val_GNU_MIPS_ABI_FP_XX
:
9148 case elfcpp::Val_GNU_MIPS_ABI_FP_64
:
9149 return "-mgp32 -mfp64";
9150 case elfcpp::Val_GNU_MIPS_ABI_FP_64A
:
9151 return "-mgp32 -mfp64 -mno-odd-spreg";
9159 template<int size
, bool big_endian
>
9161 Target_mips
<size
, big_endian
>::select_fp_abi(const std::string
& name
, int in_fp
,
9164 if (in_fp
== out_fp
)
9167 if (out_fp
== elfcpp::Val_GNU_MIPS_ABI_FP_ANY
)
9169 else if (out_fp
== elfcpp::Val_GNU_MIPS_ABI_FP_XX
9170 && (in_fp
== elfcpp::Val_GNU_MIPS_ABI_FP_DOUBLE
9171 || in_fp
== elfcpp::Val_GNU_MIPS_ABI_FP_64
9172 || in_fp
== elfcpp::Val_GNU_MIPS_ABI_FP_64A
))
9174 else if (in_fp
== elfcpp::Val_GNU_MIPS_ABI_FP_XX
9175 && (out_fp
== elfcpp::Val_GNU_MIPS_ABI_FP_DOUBLE
9176 || out_fp
== elfcpp::Val_GNU_MIPS_ABI_FP_64
9177 || out_fp
== elfcpp::Val_GNU_MIPS_ABI_FP_64A
))
9178 return out_fp
; // Keep the current setting.
9179 else if (out_fp
== elfcpp::Val_GNU_MIPS_ABI_FP_64A
9180 && in_fp
== elfcpp::Val_GNU_MIPS_ABI_FP_64
)
9182 else if (in_fp
== elfcpp::Val_GNU_MIPS_ABI_FP_64A
9183 && out_fp
== elfcpp::Val_GNU_MIPS_ABI_FP_64
)
9184 return out_fp
; // Keep the current setting.
9185 else if (in_fp
!= elfcpp::Val_GNU_MIPS_ABI_FP_ANY
)
9186 gold_warning(_("%s: FP ABI %s is incompatible with %s"), name
.c_str(),
9187 fp_abi_string(in_fp
), fp_abi_string(out_fp
));
9191 // Merge attributes from input object.
9193 template<int size
, bool big_endian
>
9195 Target_mips
<size
, big_endian
>::merge_obj_attributes(const std::string
& name
,
9196 const Attributes_section_data
* pasd
)
9198 // Return if there is no attributes section data.
9202 // If output has no object attributes, just copy.
9203 if (this->attributes_section_data_
== NULL
)
9205 this->attributes_section_data_
= new Attributes_section_data(*pasd
);
9209 Object_attribute
* out_attr
= this->attributes_section_data_
->known_attributes(
9210 Object_attribute::OBJ_ATTR_GNU
);
9212 out_attr
[elfcpp::Tag_GNU_MIPS_ABI_FP
].set_type(1);
9213 out_attr
[elfcpp::Tag_GNU_MIPS_ABI_FP
].set_int_value(this->abiflags_
->fp_abi
);
9215 // Merge Tag_compatibility attributes and any common GNU ones.
9216 this->attributes_section_data_
->merge(name
.c_str(), pasd
);
9219 // Merge abiflags from input object.
9221 template<int size
, bool big_endian
>
9223 Target_mips
<size
, big_endian
>::merge_obj_abiflags(const std::string
& name
,
9224 Mips_abiflags
<big_endian
>* in_abiflags
)
9226 // If output has no abiflags, just copy.
9227 if (this->abiflags_
== NULL
)
9229 this->abiflags_
= new Mips_abiflags
<big_endian
>(*in_abiflags
);
9233 this->abiflags_
->fp_abi
= this->select_fp_abi(name
, in_abiflags
->fp_abi
,
9234 this->abiflags_
->fp_abi
);
9237 this->abiflags_
->isa_level
= std::max(this->abiflags_
->isa_level
,
9238 in_abiflags
->isa_level
);
9239 this->abiflags_
->isa_rev
= std::max(this->abiflags_
->isa_rev
,
9240 in_abiflags
->isa_rev
);
9241 this->abiflags_
->gpr_size
= std::max(this->abiflags_
->gpr_size
,
9242 in_abiflags
->gpr_size
);
9243 this->abiflags_
->cpr1_size
= std::max(this->abiflags_
->cpr1_size
,
9244 in_abiflags
->cpr1_size
);
9245 this->abiflags_
->cpr2_size
= std::max(this->abiflags_
->cpr2_size
,
9246 in_abiflags
->cpr2_size
);
9247 this->abiflags_
->ases
|= in_abiflags
->ases
;
9248 this->abiflags_
->flags1
|= in_abiflags
->flags1
;
9251 // Check whether machine EXTENSION is an extension of machine BASE.
9252 template<int size
, bool big_endian
>
9254 Target_mips
<size
, big_endian
>::mips_mach_extends(unsigned int base
,
9255 unsigned int extension
)
9257 if (extension
== base
)
9260 if ((base
== mach_mipsisa32
)
9261 && this->mips_mach_extends(mach_mipsisa64
, extension
))
9264 if ((base
== mach_mipsisa32r2
)
9265 && this->mips_mach_extends(mach_mipsisa64r2
, extension
))
9268 for (unsigned int i
= 0; i
< this->mips_mach_extensions_
.size(); ++i
)
9269 if (extension
== this->mips_mach_extensions_
[i
].first
)
9271 extension
= this->mips_mach_extensions_
[i
].second
;
9272 if (extension
== base
)
9279 // Merge file header flags from input object.
9281 template<int size
, bool big_endian
>
9283 Target_mips
<size
, big_endian
>::merge_obj_e_flags(const std::string
& name
,
9284 elfcpp::Elf_Word in_flags
)
9286 // If flags are not set yet, just copy them.
9287 if (!this->are_processor_specific_flags_set())
9289 this->set_processor_specific_flags(in_flags
);
9290 this->mach_
= this->elf_mips_mach(in_flags
);
9294 elfcpp::Elf_Word new_flags
= in_flags
;
9295 elfcpp::Elf_Word old_flags
= this->processor_specific_flags();
9296 elfcpp::Elf_Word merged_flags
= this->processor_specific_flags();
9297 merged_flags
|= new_flags
& elfcpp::EF_MIPS_NOREORDER
;
9299 // Check flag compatibility.
9300 new_flags
&= ~elfcpp::EF_MIPS_NOREORDER
;
9301 old_flags
&= ~elfcpp::EF_MIPS_NOREORDER
;
9303 // Some IRIX 6 BSD-compatibility objects have this bit set. It
9304 // doesn't seem to matter.
9305 new_flags
&= ~elfcpp::EF_MIPS_XGOT
;
9306 old_flags
&= ~elfcpp::EF_MIPS_XGOT
;
9308 // MIPSpro generates ucode info in n64 objects. Again, we should
9309 // just be able to ignore this.
9310 new_flags
&= ~elfcpp::EF_MIPS_UCODE
;
9311 old_flags
&= ~elfcpp::EF_MIPS_UCODE
;
9313 if (new_flags
== old_flags
)
9315 this->set_processor_specific_flags(merged_flags
);
9319 if (((new_flags
& (elfcpp::EF_MIPS_PIC
| elfcpp::EF_MIPS_CPIC
)) != 0)
9320 != ((old_flags
& (elfcpp::EF_MIPS_PIC
| elfcpp::EF_MIPS_CPIC
)) != 0))
9321 gold_warning(_("%s: linking abicalls files with non-abicalls files"),
9324 if (new_flags
& (elfcpp::EF_MIPS_PIC
| elfcpp::EF_MIPS_CPIC
))
9325 merged_flags
|= elfcpp::EF_MIPS_CPIC
;
9326 if (!(new_flags
& elfcpp::EF_MIPS_PIC
))
9327 merged_flags
&= ~elfcpp::EF_MIPS_PIC
;
9329 new_flags
&= ~(elfcpp::EF_MIPS_PIC
| elfcpp::EF_MIPS_CPIC
);
9330 old_flags
&= ~(elfcpp::EF_MIPS_PIC
| elfcpp::EF_MIPS_CPIC
);
9332 // Compare the ISAs.
9333 if (mips_32bit_flags(old_flags
) != mips_32bit_flags(new_flags
))
9334 gold_error(_("%s: linking 32-bit code with 64-bit code"), name
.c_str());
9335 else if (!this->mips_mach_extends(this->elf_mips_mach(in_flags
), this->mach_
))
9337 // Output ISA isn't the same as, or an extension of, input ISA.
9338 if (this->mips_mach_extends(this->mach_
, this->elf_mips_mach(in_flags
)))
9340 // Copy the architecture info from input object to output. Also copy
9341 // the 32-bit flag (if set) so that we continue to recognise
9342 // output as a 32-bit binary.
9343 this->mach_
= this->elf_mips_mach(in_flags
);
9344 merged_flags
&= ~(elfcpp::EF_MIPS_ARCH
| elfcpp::EF_MIPS_MACH
);
9345 merged_flags
|= (new_flags
& (elfcpp::EF_MIPS_ARCH
9346 | elfcpp::EF_MIPS_MACH
| elfcpp::EF_MIPS_32BITMODE
));
9348 // Update the ABI flags isa_level, isa_rev, isa_ext fields.
9349 this->update_abiflags_isa(name
, merged_flags
, this->abiflags_
);
9351 // Copy across the ABI flags if output doesn't use them
9352 // and if that was what caused us to treat input object as 32-bit.
9353 if ((old_flags
& elfcpp::EF_MIPS_ABI
) == 0
9354 && this->mips_32bit_flags(new_flags
)
9355 && !this->mips_32bit_flags(new_flags
& ~elfcpp::EF_MIPS_ABI
))
9356 merged_flags
|= new_flags
& elfcpp::EF_MIPS_ABI
;
9359 // The ISAs aren't compatible.
9360 gold_error(_("%s: linking %s module with previous %s modules"),
9361 name
.c_str(), this->elf_mips_mach_name(in_flags
),
9362 this->elf_mips_mach_name(merged_flags
));
9365 new_flags
&= (~(elfcpp::EF_MIPS_ARCH
| elfcpp::EF_MIPS_MACH
9366 | elfcpp::EF_MIPS_32BITMODE
));
9367 old_flags
&= (~(elfcpp::EF_MIPS_ARCH
| elfcpp::EF_MIPS_MACH
9368 | elfcpp::EF_MIPS_32BITMODE
));
9371 if ((new_flags
& elfcpp::EF_MIPS_ABI
) != (old_flags
& elfcpp::EF_MIPS_ABI
))
9373 // Only error if both are set (to different values).
9374 if ((new_flags
& elfcpp::EF_MIPS_ABI
)
9375 && (old_flags
& elfcpp::EF_MIPS_ABI
))
9376 gold_error(_("%s: ABI mismatch: linking %s module with "
9377 "previous %s modules"), name
.c_str(),
9378 this->elf_mips_abi_name(in_flags
),
9379 this->elf_mips_abi_name(merged_flags
));
9381 new_flags
&= ~elfcpp::EF_MIPS_ABI
;
9382 old_flags
&= ~elfcpp::EF_MIPS_ABI
;
9385 // Compare ASEs. Forbid linking MIPS16 and microMIPS ASE modules together
9386 // and allow arbitrary mixing of the remaining ASEs (retain the union).
9387 if ((new_flags
& elfcpp::EF_MIPS_ARCH_ASE
)
9388 != (old_flags
& elfcpp::EF_MIPS_ARCH_ASE
))
9390 int old_micro
= old_flags
& elfcpp::EF_MIPS_ARCH_ASE_MICROMIPS
;
9391 int new_micro
= new_flags
& elfcpp::EF_MIPS_ARCH_ASE_MICROMIPS
;
9392 int old_m16
= old_flags
& elfcpp::EF_MIPS_ARCH_ASE_M16
;
9393 int new_m16
= new_flags
& elfcpp::EF_MIPS_ARCH_ASE_M16
;
9394 int micro_mis
= old_m16
&& new_micro
;
9395 int m16_mis
= old_micro
&& new_m16
;
9397 if (m16_mis
|| micro_mis
)
9398 gold_error(_("%s: ASE mismatch: linking %s module with "
9399 "previous %s modules"), name
.c_str(),
9400 m16_mis
? "MIPS16" : "microMIPS",
9401 m16_mis
? "microMIPS" : "MIPS16");
9403 merged_flags
|= new_flags
& elfcpp::EF_MIPS_ARCH_ASE
;
9405 new_flags
&= ~ elfcpp::EF_MIPS_ARCH_ASE
;
9406 old_flags
&= ~ elfcpp::EF_MIPS_ARCH_ASE
;
9409 // Compare NaN encodings.
9410 if ((new_flags
& elfcpp::EF_MIPS_NAN2008
) != (old_flags
& elfcpp::EF_MIPS_NAN2008
))
9412 gold_error(_("%s: linking %s module with previous %s modules"),
9414 (new_flags
& elfcpp::EF_MIPS_NAN2008
9415 ? "-mnan=2008" : "-mnan=legacy"),
9416 (old_flags
& elfcpp::EF_MIPS_NAN2008
9417 ? "-mnan=2008" : "-mnan=legacy"));
9419 new_flags
&= ~elfcpp::EF_MIPS_NAN2008
;
9420 old_flags
&= ~elfcpp::EF_MIPS_NAN2008
;
9423 // Compare FP64 state.
9424 if ((new_flags
& elfcpp::EF_MIPS_FP64
) != (old_flags
& elfcpp::EF_MIPS_FP64
))
9426 gold_error(_("%s: linking %s module with previous %s modules"),
9428 (new_flags
& elfcpp::EF_MIPS_FP64
9429 ? "-mfp64" : "-mfp32"),
9430 (old_flags
& elfcpp::EF_MIPS_FP64
9431 ? "-mfp64" : "-mfp32"));
9433 new_flags
&= ~elfcpp::EF_MIPS_FP64
;
9434 old_flags
&= ~elfcpp::EF_MIPS_FP64
;
9437 // Warn about any other mismatches.
9438 if (new_flags
!= old_flags
)
9439 gold_error(_("%s: uses different e_flags (0x%x) fields than previous "
9440 "modules (0x%x)"), name
.c_str(), new_flags
, old_flags
);
9442 this->set_processor_specific_flags(merged_flags
);
9445 // Adjust ELF file header.
9447 template<int size
, bool big_endian
>
9449 Target_mips
<size
, big_endian
>::do_adjust_elf_header(
9450 unsigned char* view
,
9453 gold_assert(len
== elfcpp::Elf_sizes
<size
>::ehdr_size
);
9455 elfcpp::Ehdr
<size
, big_endian
> ehdr(view
);
9456 unsigned char e_ident
[elfcpp::EI_NIDENT
];
9457 elfcpp::Elf_Word flags
= this->processor_specific_flags();
9458 memcpy(e_ident
, ehdr
.get_e_ident(), elfcpp::EI_NIDENT
);
9460 unsigned char ei_abiversion
= 0;
9461 elfcpp::Elf_Half type
= ehdr
.get_e_type();
9462 if (type
== elfcpp::ET_EXEC
9463 && parameters
->options().copyreloc()
9464 && (flags
& (elfcpp::EF_MIPS_PIC
| elfcpp::EF_MIPS_CPIC
))
9465 == elfcpp::EF_MIPS_CPIC
)
9468 if (this->abiflags_
!= NULL
9469 && (this->abiflags_
->fp_abi
== elfcpp::Val_GNU_MIPS_ABI_FP_64
9470 || this->abiflags_
->fp_abi
== elfcpp::Val_GNU_MIPS_ABI_FP_64A
))
9473 e_ident
[elfcpp::EI_ABIVERSION
] = ei_abiversion
;
9474 elfcpp::Ehdr_write
<size
, big_endian
> oehdr(view
);
9475 oehdr
.put_e_ident(e_ident
);
9477 if (this->entry_symbol_is_compressed_
)
9478 oehdr
.put_e_entry(ehdr
.get_e_entry() + 1);
9481 // do_make_elf_object to override the same function in the base class.
9482 // We need to use a target-specific sub-class of
9483 // Sized_relobj_file<size, big_endian> to store Mips specific information.
9484 // Hence we need to have our own ELF object creation.
9486 template<int size
, bool big_endian
>
9488 Target_mips
<size
, big_endian
>::do_make_elf_object(
9489 const std::string
& name
,
9490 Input_file
* input_file
,
9491 off_t offset
, const elfcpp::Ehdr
<size
, big_endian
>& ehdr
)
9493 int et
= ehdr
.get_e_type();
9494 // ET_EXEC files are valid input for --just-symbols/-R,
9495 // and we treat them as relocatable objects.
9496 if (et
== elfcpp::ET_REL
9497 || (et
== elfcpp::ET_EXEC
&& input_file
->just_symbols()))
9499 Mips_relobj
<size
, big_endian
>* obj
=
9500 new Mips_relobj
<size
, big_endian
>(name
, input_file
, offset
, ehdr
);
9504 else if (et
== elfcpp::ET_DYN
)
9506 // TODO(sasa): Should we create Mips_dynobj?
9507 return Target::do_make_elf_object(name
, input_file
, offset
, ehdr
);
9511 gold_error(_("%s: unsupported ELF file type %d"),
9517 // Finalize the sections.
9519 template <int size
, bool big_endian
>
9521 Target_mips
<size
, big_endian
>::do_finalize_sections(Layout
* layout
,
9522 const Input_objects
* input_objects
,
9523 Symbol_table
* symtab
)
9525 // Add +1 to MIPS16 and microMIPS init_ and _fini symbols so that DT_INIT and
9526 // DT_FINI have correct values.
9527 Mips_symbol
<size
>* init
= static_cast<Mips_symbol
<size
>*>(
9528 symtab
->lookup(parameters
->options().init()));
9529 if (init
!= NULL
&& (init
->is_mips16() || init
->is_micromips()))
9530 init
->set_value(init
->value() | 1);
9531 Mips_symbol
<size
>* fini
= static_cast<Mips_symbol
<size
>*>(
9532 symtab
->lookup(parameters
->options().fini()));
9533 if (fini
!= NULL
&& (fini
->is_mips16() || fini
->is_micromips()))
9534 fini
->set_value(fini
->value() | 1);
9536 // Check whether the entry symbol is mips16 or micromips. This is needed to
9537 // adjust entry address in ELF header.
9538 Mips_symbol
<size
>* entry
=
9539 static_cast<Mips_symbol
<size
>*>(symtab
->lookup(this->entry_symbol_name()));
9540 this->entry_symbol_is_compressed_
= (entry
!= NULL
&& (entry
->is_mips16()
9541 || entry
->is_micromips()));
9543 if (!parameters
->doing_static_link()
9544 && (strcmp(parameters
->options().hash_style(), "gnu") == 0
9545 || strcmp(parameters
->options().hash_style(), "both") == 0))
9547 // .gnu.hash and the MIPS ABI require .dynsym to be sorted in different
9548 // ways. .gnu.hash needs symbols to be grouped by hash code whereas the
9549 // MIPS ABI requires a mapping between the GOT and the symbol table.
9550 gold_error(".gnu.hash is incompatible with the MIPS ABI");
9553 // Check whether the final section that was scanned has HI16 or GOT16
9554 // relocations without the corresponding LO16 part.
9555 if (this->got16_addends_
.size() > 0)
9556 gold_error("Can't find matching LO16 reloc");
9558 // Check for any mips16 stub sections that we can discard.
9559 if (!parameters
->options().relocatable())
9561 for (Input_objects::Relobj_iterator p
= input_objects
->relobj_begin();
9562 p
!= input_objects
->relobj_end();
9565 Mips_relobj
<size
, big_endian
>* object
=
9566 Mips_relobj
<size
, big_endian
>::as_mips_relobj(*p
);
9567 object
->discard_mips16_stub_sections(symtab
);
9571 Valtype gprmask
= 0;
9572 Valtype cprmask1
= 0;
9573 Valtype cprmask2
= 0;
9574 Valtype cprmask3
= 0;
9575 Valtype cprmask4
= 0;
9576 bool has_reginfo_section
= false;
9578 for (Input_objects::Relobj_iterator p
= input_objects
->relobj_begin();
9579 p
!= input_objects
->relobj_end();
9582 Mips_relobj
<size
, big_endian
>* relobj
=
9583 Mips_relobj
<size
, big_endian
>::as_mips_relobj(*p
);
9585 // Merge .reginfo contents of input objects.
9586 if (relobj
->has_reginfo_section())
9588 has_reginfo_section
= true;
9589 gprmask
|= relobj
->gprmask();
9590 cprmask1
|= relobj
->cprmask1();
9591 cprmask2
|= relobj
->cprmask2();
9592 cprmask3
|= relobj
->cprmask3();
9593 cprmask4
|= relobj
->cprmask4();
9596 Input_file::Format format
= relobj
->input_file()->format();
9597 if (format
!= Input_file::FORMAT_ELF
)
9600 // If all input sections will be discarded, don't use this object
9601 // file for merging processor specific flags.
9602 bool should_merge_processor_specific_flags
= false;
9604 for (unsigned int i
= 1; i
< relobj
->shnum(); ++i
)
9605 if (relobj
->output_section(i
) != NULL
)
9607 should_merge_processor_specific_flags
= true;
9611 if (!should_merge_processor_specific_flags
)
9614 // Merge processor specific flags.
9615 Mips_abiflags
<big_endian
> in_abiflags
;
9617 this->create_abiflags(relobj
, &in_abiflags
);
9618 this->merge_obj_e_flags(relobj
->name(),
9619 relobj
->processor_specific_flags());
9620 this->merge_obj_abiflags(relobj
->name(), &in_abiflags
);
9621 this->merge_obj_attributes(relobj
->name(),
9622 relobj
->attributes_section_data());
9625 // Create a .gnu.attributes section if we have merged any attributes
9627 if (this->attributes_section_data_
!= NULL
)
9629 Output_attributes_section_data
* attributes_section
=
9630 new Output_attributes_section_data(*this->attributes_section_data_
);
9631 layout
->add_output_section_data(".gnu.attributes",
9632 elfcpp::SHT_GNU_ATTRIBUTES
, 0,
9633 attributes_section
, ORDER_INVALID
, false);
9636 // Create .MIPS.abiflags output section if there is an input section.
9637 if (this->has_abiflags_section_
)
9639 Mips_output_section_abiflags
<size
, big_endian
>* abiflags_section
=
9640 new Mips_output_section_abiflags
<size
, big_endian
>(*this->abiflags_
);
9642 Output_section
* os
=
9643 layout
->add_output_section_data(".MIPS.abiflags",
9644 elfcpp::SHT_MIPS_ABIFLAGS
,
9646 abiflags_section
, ORDER_INVALID
, false);
9648 if (!parameters
->options().relocatable() && os
!= NULL
)
9650 Output_segment
* abiflags_segment
=
9651 layout
->make_output_segment(elfcpp::PT_MIPS_ABIFLAGS
, elfcpp::PF_R
);
9652 abiflags_segment
->add_output_section_to_nonload(os
, elfcpp::PF_R
);
9656 if (has_reginfo_section
&& !parameters
->options().gc_sections())
9658 // Create .reginfo output section.
9659 Mips_output_section_reginfo
<size
, big_endian
>* reginfo_section
=
9660 new Mips_output_section_reginfo
<size
, big_endian
>(this, gprmask
,
9662 cprmask3
, cprmask4
);
9664 Output_section
* os
=
9665 layout
->add_output_section_data(".reginfo", elfcpp::SHT_MIPS_REGINFO
,
9666 elfcpp::SHF_ALLOC
, reginfo_section
,
9667 ORDER_INVALID
, false);
9669 if (!parameters
->options().relocatable() && os
!= NULL
)
9671 Output_segment
* reginfo_segment
=
9672 layout
->make_output_segment(elfcpp::PT_MIPS_REGINFO
,
9674 reginfo_segment
->add_output_section_to_nonload(os
, elfcpp::PF_R
);
9678 if (this->plt_
!= NULL
)
9680 // Set final PLT offsets for symbols.
9681 this->plt_section()->set_plt_offsets();
9683 // Define _PROCEDURE_LINKAGE_TABLE_ at the start of the .plt section.
9684 // Set STO_MICROMIPS flag if the output has microMIPS code, but only if
9685 // there are no standard PLT entries present.
9686 unsigned char nonvis
= 0;
9687 if (this->is_output_micromips()
9688 && !this->plt_section()->has_standard_entries())
9689 nonvis
= elfcpp::STO_MICROMIPS
>> 2;
9690 symtab
->define_in_output_data("_PROCEDURE_LINKAGE_TABLE_", NULL
,
9691 Symbol_table::PREDEFINED
,
9693 0, 0, elfcpp::STT_FUNC
,
9695 elfcpp::STV_DEFAULT
, nonvis
,
9699 if (this->mips_stubs_
!= NULL
)
9701 // Define _MIPS_STUBS_ at the start of the .MIPS.stubs section.
9702 unsigned char nonvis
= 0;
9703 if (this->is_output_micromips())
9704 nonvis
= elfcpp::STO_MICROMIPS
>> 2;
9705 symtab
->define_in_output_data("_MIPS_STUBS_", NULL
,
9706 Symbol_table::PREDEFINED
,
9708 0, 0, elfcpp::STT_FUNC
,
9710 elfcpp::STV_DEFAULT
, nonvis
,
9714 if (!parameters
->options().relocatable() && !parameters
->doing_static_link())
9715 // In case there is no .got section, create one.
9716 this->got_section(symtab
, layout
);
9718 // Emit any relocs we saved in an attempt to avoid generating COPY
9720 if (this->copy_relocs_
.any_saved_relocs())
9721 this->copy_relocs_
.emit_mips(this->rel_dyn_section(layout
), symtab
, layout
,
9725 this->set_gp(layout
, symtab
);
9727 // Emit dynamic relocs.
9728 for (typename
std::vector
<Dyn_reloc
>::iterator p
= this->dyn_relocs_
.begin();
9729 p
!= this->dyn_relocs_
.end();
9731 p
->emit(this->rel_dyn_section(layout
), this->got_section(), symtab
);
9733 if (this->has_got_section())
9734 this->got_section()->lay_out_got(layout
, symtab
, input_objects
);
9736 if (this->mips_stubs_
!= NULL
)
9737 this->mips_stubs_
->set_needs_dynsym_value();
9739 // Check for functions that might need $25 to be valid on entry.
9740 // TODO(sasa): Can we do this without iterating over all symbols?
9741 typedef Symbol_visitor_check_symbols
<size
, big_endian
> Symbol_visitor
;
9742 symtab
->for_all_symbols
<size
, Symbol_visitor
>(Symbol_visitor(this, layout
,
9745 // Add NULL segment.
9746 if (!parameters
->options().relocatable())
9747 layout
->make_output_segment(elfcpp::PT_NULL
, 0);
9749 // Fill in some more dynamic tags.
9750 // TODO(sasa): Add more dynamic tags.
9751 const Reloc_section
* rel_plt
= (this->plt_
== NULL
9752 ? NULL
: this->plt_
->rel_plt());
9753 layout
->add_target_dynamic_tags(true, this->got_
, rel_plt
,
9754 this->rel_dyn_
, true, false);
9756 Output_data_dynamic
* const odyn
= layout
->dynamic_data();
9758 && !parameters
->options().relocatable()
9759 && !parameters
->doing_static_link())
9762 // This element holds a 32-bit version id for the Runtime
9763 // Linker Interface. This will start at integer value 1.
9765 odyn
->add_constant(elfcpp::DT_MIPS_RLD_VERSION
, d_val
);
9768 d_val
= elfcpp::RHF_NOTPOT
;
9769 odyn
->add_constant(elfcpp::DT_MIPS_FLAGS
, d_val
);
9771 // Save layout for using when emitting custom dynamic tags.
9772 this->layout_
= layout
;
9774 // This member holds the base address of the segment.
9775 odyn
->add_custom(elfcpp::DT_MIPS_BASE_ADDRESS
);
9777 // This member holds the number of entries in the .dynsym section.
9778 odyn
->add_custom(elfcpp::DT_MIPS_SYMTABNO
);
9780 // This member holds the index of the first dynamic symbol
9781 // table entry that corresponds to an entry in the global offset table.
9782 odyn
->add_custom(elfcpp::DT_MIPS_GOTSYM
);
9784 // This member holds the number of local GOT entries.
9785 odyn
->add_constant(elfcpp::DT_MIPS_LOCAL_GOTNO
,
9786 this->got_
->get_local_gotno());
9788 if (this->plt_
!= NULL
)
9789 // DT_MIPS_PLTGOT dynamic tag
9790 odyn
->add_section_address(elfcpp::DT_MIPS_PLTGOT
, this->got_plt_
);
9792 if (!parameters
->options().shared())
9794 this->rld_map_
= new Output_data_zero_fill(size
/ 8, size
/ 8);
9796 layout
->add_output_section_data(".rld_map", elfcpp::SHT_PROGBITS
,
9797 (elfcpp::SHF_ALLOC
| elfcpp::SHF_WRITE
),
9798 this->rld_map_
, ORDER_INVALID
, false);
9800 // __RLD_MAP will be filled in by the runtime loader to contain
9801 // a pointer to the _r_debug structure.
9802 Symbol
* rld_map
= symtab
->define_in_output_data("__RLD_MAP", NULL
,
9803 Symbol_table::PREDEFINED
,
9805 0, 0, elfcpp::STT_OBJECT
,
9807 elfcpp::STV_DEFAULT
, 0,
9810 if (!rld_map
->is_forced_local())
9811 rld_map
->set_needs_dynsym_entry();
9813 if (!parameters
->options().pie())
9814 // This member holds the absolute address of the debug pointer.
9815 odyn
->add_section_address(elfcpp::DT_MIPS_RLD_MAP
, this->rld_map_
);
9817 // This member holds the offset to the debug pointer,
9818 // relative to the address of the tag.
9819 odyn
->add_custom(elfcpp::DT_MIPS_RLD_MAP_REL
);
9824 // Get the custom dynamic tag value.
9825 template<int size
, bool big_endian
>
9827 Target_mips
<size
, big_endian
>::do_dynamic_tag_custom_value(elfcpp::DT tag
) const
9831 case elfcpp::DT_MIPS_BASE_ADDRESS
:
9833 // The base address of the segment.
9834 // At this point, the segment list has been sorted into final order,
9835 // so just return vaddr of the first readable PT_LOAD segment.
9836 Output_segment
* seg
=
9837 this->layout_
->find_output_segment(elfcpp::PT_LOAD
, elfcpp::PF_R
, 0);
9838 gold_assert(seg
!= NULL
);
9839 return seg
->vaddr();
9842 case elfcpp::DT_MIPS_SYMTABNO
:
9843 // The number of entries in the .dynsym section.
9844 return this->get_dt_mips_symtabno();
9846 case elfcpp::DT_MIPS_GOTSYM
:
9848 // The index of the first dynamic symbol table entry that corresponds
9849 // to an entry in the GOT.
9850 if (this->got_
->first_global_got_dynsym_index() != -1U)
9851 return this->got_
->first_global_got_dynsym_index();
9853 // In case if we don't have global GOT symbols we default to setting
9854 // DT_MIPS_GOTSYM to the same value as DT_MIPS_SYMTABNO.
9855 return this->get_dt_mips_symtabno();
9858 case elfcpp::DT_MIPS_RLD_MAP_REL
:
9860 // The MIPS_RLD_MAP_REL tag stores the offset to the debug pointer,
9861 // relative to the address of the tag.
9862 Output_data_dynamic
* const odyn
= this->layout_
->dynamic_data();
9863 unsigned int entry_offset
=
9864 odyn
->get_entry_offset(elfcpp::DT_MIPS_RLD_MAP_REL
);
9865 gold_assert(entry_offset
!= -1U);
9866 return this->rld_map_
->address() - (odyn
->address() + entry_offset
);
9869 gold_error(_("Unknown dynamic tag 0x%x"), (unsigned int)tag
);
9872 return (unsigned int)-1;
9875 // Relocate section data.
9877 template<int size
, bool big_endian
>
9879 Target_mips
<size
, big_endian
>::relocate_section(
9880 const Relocate_info
<size
, big_endian
>* relinfo
,
9881 unsigned int sh_type
,
9882 const unsigned char* prelocs
,
9884 Output_section
* output_section
,
9885 bool needs_special_offset_handling
,
9886 unsigned char* view
,
9887 Mips_address address
,
9888 section_size_type view_size
,
9889 const Reloc_symbol_changes
* reloc_symbol_changes
)
9891 typedef Target_mips
<size
, big_endian
> Mips
;
9892 typedef typename Target_mips
<size
, big_endian
>::Relocate Mips_relocate
;
9894 if (sh_type
== elfcpp::SHT_REL
)
9896 typedef Mips_classify_reloc
<elfcpp::SHT_REL
, size
, big_endian
>
9899 gold::relocate_section
<size
, big_endian
, Mips
, Mips_relocate
,
9900 gold::Default_comdat_behavior
, Classify_reloc
>(
9906 needs_special_offset_handling
,
9910 reloc_symbol_changes
);
9912 else if (sh_type
== elfcpp::SHT_RELA
)
9914 typedef Mips_classify_reloc
<elfcpp::SHT_RELA
, size
, big_endian
>
9917 gold::relocate_section
<size
, big_endian
, Mips
, Mips_relocate
,
9918 gold::Default_comdat_behavior
, Classify_reloc
>(
9924 needs_special_offset_handling
,
9928 reloc_symbol_changes
);
9932 // Return the size of a relocation while scanning during a relocatable
9936 mips_get_size_for_reloc(unsigned int r_type
, Relobj
* object
)
9940 case elfcpp::R_MIPS_NONE
:
9941 case elfcpp::R_MIPS_TLS_DTPMOD64
:
9942 case elfcpp::R_MIPS_TLS_DTPREL64
:
9943 case elfcpp::R_MIPS_TLS_TPREL64
:
9946 case elfcpp::R_MIPS_32
:
9947 case elfcpp::R_MIPS_TLS_DTPMOD32
:
9948 case elfcpp::R_MIPS_TLS_DTPREL32
:
9949 case elfcpp::R_MIPS_TLS_TPREL32
:
9950 case elfcpp::R_MIPS_REL32
:
9951 case elfcpp::R_MIPS_PC32
:
9952 case elfcpp::R_MIPS_GPREL32
:
9953 case elfcpp::R_MIPS_JALR
:
9954 case elfcpp::R_MIPS_EH
:
9957 case elfcpp::R_MIPS_16
:
9958 case elfcpp::R_MIPS_HI16
:
9959 case elfcpp::R_MIPS_LO16
:
9960 case elfcpp::R_MIPS_HIGHER
:
9961 case elfcpp::R_MIPS_HIGHEST
:
9962 case elfcpp::R_MIPS_GPREL16
:
9963 case elfcpp::R_MIPS16_HI16
:
9964 case elfcpp::R_MIPS16_LO16
:
9965 case elfcpp::R_MIPS_PC16
:
9966 case elfcpp::R_MIPS_PCHI16
:
9967 case elfcpp::R_MIPS_PCLO16
:
9968 case elfcpp::R_MIPS_GOT16
:
9969 case elfcpp::R_MIPS16_GOT16
:
9970 case elfcpp::R_MIPS_CALL16
:
9971 case elfcpp::R_MIPS16_CALL16
:
9972 case elfcpp::R_MIPS_GOT_HI16
:
9973 case elfcpp::R_MIPS_CALL_HI16
:
9974 case elfcpp::R_MIPS_GOT_LO16
:
9975 case elfcpp::R_MIPS_CALL_LO16
:
9976 case elfcpp::R_MIPS_TLS_DTPREL_HI16
:
9977 case elfcpp::R_MIPS_TLS_DTPREL_LO16
:
9978 case elfcpp::R_MIPS_TLS_TPREL_HI16
:
9979 case elfcpp::R_MIPS_TLS_TPREL_LO16
:
9980 case elfcpp::R_MIPS16_GPREL
:
9981 case elfcpp::R_MIPS_GOT_DISP
:
9982 case elfcpp::R_MIPS_LITERAL
:
9983 case elfcpp::R_MIPS_GOT_PAGE
:
9984 case elfcpp::R_MIPS_GOT_OFST
:
9985 case elfcpp::R_MIPS_TLS_GD
:
9986 case elfcpp::R_MIPS_TLS_LDM
:
9987 case elfcpp::R_MIPS_TLS_GOTTPREL
:
9990 // These relocations are not byte sized
9991 case elfcpp::R_MIPS_26
:
9992 case elfcpp::R_MIPS16_26
:
9993 case elfcpp::R_MIPS_PC21_S2
:
9994 case elfcpp::R_MIPS_PC26_S2
:
9995 case elfcpp::R_MIPS_PC18_S3
:
9996 case elfcpp::R_MIPS_PC19_S2
:
9999 case elfcpp::R_MIPS_COPY
:
10000 case elfcpp::R_MIPS_JUMP_SLOT
:
10001 object
->error(_("unexpected reloc %u in object file"), r_type
);
10005 object
->error(_("unsupported reloc %u in object file"), r_type
);
10010 // Scan the relocs during a relocatable link.
10012 template<int size
, bool big_endian
>
10014 Target_mips
<size
, big_endian
>::scan_relocatable_relocs(
10015 Symbol_table
* symtab
,
10017 Sized_relobj_file
<size
, big_endian
>* object
,
10018 unsigned int data_shndx
,
10019 unsigned int sh_type
,
10020 const unsigned char* prelocs
,
10021 size_t reloc_count
,
10022 Output_section
* output_section
,
10023 bool needs_special_offset_handling
,
10024 size_t local_symbol_count
,
10025 const unsigned char* plocal_symbols
,
10026 Relocatable_relocs
* rr
)
10028 if (sh_type
== elfcpp::SHT_REL
)
10030 typedef Mips_classify_reloc
<elfcpp::SHT_REL
, size
, big_endian
>
10032 typedef Mips_scan_relocatable_relocs
<big_endian
, Classify_reloc
>
10033 Scan_relocatable_relocs
;
10035 gold::scan_relocatable_relocs
<size
, big_endian
, Scan_relocatable_relocs
>(
10043 needs_special_offset_handling
,
10044 local_symbol_count
,
10048 else if (sh_type
== elfcpp::SHT_RELA
)
10050 typedef Mips_classify_reloc
<elfcpp::SHT_RELA
, size
, big_endian
>
10052 typedef Mips_scan_relocatable_relocs
<big_endian
, Classify_reloc
>
10053 Scan_relocatable_relocs
;
10055 gold::scan_relocatable_relocs
<size
, big_endian
, Scan_relocatable_relocs
>(
10063 needs_special_offset_handling
,
10064 local_symbol_count
,
10069 gold_unreachable();
10072 // Scan the relocs for --emit-relocs.
10074 template<int size
, bool big_endian
>
10076 Target_mips
<size
, big_endian
>::emit_relocs_scan(
10077 Symbol_table
* symtab
,
10079 Sized_relobj_file
<size
, big_endian
>* object
,
10080 unsigned int data_shndx
,
10081 unsigned int sh_type
,
10082 const unsigned char* prelocs
,
10083 size_t reloc_count
,
10084 Output_section
* output_section
,
10085 bool needs_special_offset_handling
,
10086 size_t local_symbol_count
,
10087 const unsigned char* plocal_syms
,
10088 Relocatable_relocs
* rr
)
10090 if (sh_type
== elfcpp::SHT_REL
)
10092 typedef Mips_classify_reloc
<elfcpp::SHT_REL
, size
, big_endian
>
10094 typedef gold::Default_emit_relocs_strategy
<Classify_reloc
>
10095 Emit_relocs_strategy
;
10097 gold::scan_relocatable_relocs
<size
, big_endian
, Emit_relocs_strategy
>(
10105 needs_special_offset_handling
,
10106 local_symbol_count
,
10110 else if (sh_type
== elfcpp::SHT_RELA
)
10112 typedef Mips_classify_reloc
<elfcpp::SHT_RELA
, size
, big_endian
>
10114 typedef gold::Default_emit_relocs_strategy
<Classify_reloc
>
10115 Emit_relocs_strategy
;
10117 gold::scan_relocatable_relocs
<size
, big_endian
, Emit_relocs_strategy
>(
10125 needs_special_offset_handling
,
10126 local_symbol_count
,
10131 gold_unreachable();
10134 // Emit relocations for a section.
10136 template<int size
, bool big_endian
>
10138 Target_mips
<size
, big_endian
>::relocate_relocs(
10139 const Relocate_info
<size
, big_endian
>* relinfo
,
10140 unsigned int sh_type
,
10141 const unsigned char* prelocs
,
10142 size_t reloc_count
,
10143 Output_section
* output_section
,
10144 typename
elfcpp::Elf_types
<size
>::Elf_Off
10145 offset_in_output_section
,
10146 unsigned char* view
,
10147 Mips_address view_address
,
10148 section_size_type view_size
,
10149 unsigned char* reloc_view
,
10150 section_size_type reloc_view_size
)
10152 if (sh_type
== elfcpp::SHT_REL
)
10154 typedef Mips_classify_reloc
<elfcpp::SHT_REL
, size
, big_endian
>
10157 gold::relocate_relocs
<size
, big_endian
, Classify_reloc
>(
10162 offset_in_output_section
,
10169 else if (sh_type
== elfcpp::SHT_RELA
)
10171 typedef Mips_classify_reloc
<elfcpp::SHT_RELA
, size
, big_endian
>
10174 gold::relocate_relocs
<size
, big_endian
, Classify_reloc
>(
10179 offset_in_output_section
,
10187 gold_unreachable();
10190 // Perform target-specific processing in a relocatable link. This is
10191 // only used if we use the relocation strategy RELOC_SPECIAL.
10193 template<int size
, bool big_endian
>
10195 Target_mips
<size
, big_endian
>::relocate_special_relocatable(
10196 const Relocate_info
<size
, big_endian
>* relinfo
,
10197 unsigned int sh_type
,
10198 const unsigned char* preloc_in
,
10200 Output_section
* output_section
,
10201 typename
elfcpp::Elf_types
<size
>::Elf_Off offset_in_output_section
,
10202 unsigned char* view
,
10203 Mips_address view_address
,
10205 unsigned char* preloc_out
)
10207 // We can only handle REL type relocation sections.
10208 gold_assert(sh_type
== elfcpp::SHT_REL
);
10210 typedef typename Reloc_types
<elfcpp::SHT_REL
, size
, big_endian
>::Reloc
10212 typedef typename Reloc_types
<elfcpp::SHT_REL
, size
, big_endian
>::Reloc_write
10215 typedef Mips_relocate_functions
<size
, big_endian
> Reloc_funcs
;
10217 const Mips_address invalid_address
= static_cast<Mips_address
>(0) - 1;
10219 Mips_relobj
<size
, big_endian
>* object
=
10220 Mips_relobj
<size
, big_endian
>::as_mips_relobj(relinfo
->object
);
10221 const unsigned int local_count
= object
->local_symbol_count();
10223 Reltype
reloc(preloc_in
);
10224 Reltype_write
reloc_write(preloc_out
);
10226 elfcpp::Elf_types
<32>::Elf_WXword r_info
= reloc
.get_r_info();
10227 const unsigned int r_sym
= elfcpp::elf_r_sym
<size
>(r_info
);
10228 const unsigned int r_type
= elfcpp::elf_r_type
<size
>(r_info
);
10230 // Get the new symbol index.
10231 // We only use RELOC_SPECIAL strategy in local relocations.
10232 gold_assert(r_sym
< local_count
);
10234 // We are adjusting a section symbol. We need to find
10235 // the symbol table index of the section symbol for
10236 // the output section corresponding to input section
10237 // in which this symbol is defined.
10239 unsigned int shndx
= object
->local_symbol_input_shndx(r_sym
, &is_ordinary
);
10240 gold_assert(is_ordinary
);
10241 Output_section
* os
= object
->output_section(shndx
);
10242 gold_assert(os
!= NULL
);
10243 gold_assert(os
->needs_symtab_index());
10244 unsigned int new_symndx
= os
->symtab_index();
10246 // Get the new offset--the location in the output section where
10247 // this relocation should be applied.
10249 Mips_address offset
= reloc
.get_r_offset();
10250 Mips_address new_offset
;
10251 if (offset_in_output_section
!= invalid_address
)
10252 new_offset
= offset
+ offset_in_output_section
;
10255 section_offset_type sot_offset
=
10256 convert_types
<section_offset_type
, Mips_address
>(offset
);
10257 section_offset_type new_sot_offset
=
10258 output_section
->output_offset(object
, relinfo
->data_shndx
,
10260 gold_assert(new_sot_offset
!= -1);
10261 new_offset
= new_sot_offset
;
10264 // In an object file, r_offset is an offset within the section.
10265 // In an executable or dynamic object, generated by
10266 // --emit-relocs, r_offset is an absolute address.
10267 if (!parameters
->options().relocatable())
10269 new_offset
+= view_address
;
10270 if (offset_in_output_section
!= invalid_address
)
10271 new_offset
-= offset_in_output_section
;
10274 reloc_write
.put_r_offset(new_offset
);
10275 reloc_write
.put_r_info(elfcpp::elf_r_info
<32>(new_symndx
, r_type
));
10277 // Handle the reloc addend.
10278 // The relocation uses a section symbol in the input file.
10279 // We are adjusting it to use a section symbol in the output
10280 // file. The input section symbol refers to some address in
10281 // the input section. We need the relocation in the output
10282 // file to refer to that same address. This adjustment to
10283 // the addend is the same calculation we use for a simple
10284 // absolute relocation for the input section symbol.
10285 Valtype calculated_value
= 0;
10286 const Symbol_value
<size
>* psymval
= object
->local_symbol(r_sym
);
10288 unsigned char* paddend
= view
+ offset
;
10289 typename
Reloc_funcs::Status reloc_status
= Reloc_funcs::STATUS_OKAY
;
10292 case elfcpp::R_MIPS_26
:
10293 reloc_status
= Reloc_funcs::rel26(paddend
, object
, psymval
,
10294 offset_in_output_section
, true, 0, sh_type
== elfcpp::SHT_REL
, NULL
,
10295 false /*TODO(sasa): cross mode jump*/, r_type
, this->jal_to_bal(),
10296 false, &calculated_value
);
10300 gold_unreachable();
10303 // Report any errors.
10304 switch (reloc_status
)
10306 case Reloc_funcs::STATUS_OKAY
:
10308 case Reloc_funcs::STATUS_OVERFLOW
:
10309 gold_error_at_location(relinfo
, relnum
, reloc
.get_r_offset(),
10310 _("relocation overflow"));
10312 case Reloc_funcs::STATUS_BAD_RELOC
:
10313 gold_error_at_location(relinfo
, relnum
, reloc
.get_r_offset(),
10314 _("unexpected opcode while processing relocation"));
10317 gold_unreachable();
10321 // Optimize the TLS relocation type based on what we know about the
10322 // symbol. IS_FINAL is true if the final address of this symbol is
10323 // known at link time.
10325 template<int size
, bool big_endian
>
10326 tls::Tls_optimization
10327 Target_mips
<size
, big_endian
>::optimize_tls_reloc(bool, int)
10329 // FIXME: Currently we do not do any TLS optimization.
10330 return tls::TLSOPT_NONE
;
10333 // Scan a relocation for a local symbol.
10335 template<int size
, bool big_endian
>
10337 Target_mips
<size
, big_endian
>::Scan::local(
10338 Symbol_table
* symtab
,
10340 Target_mips
<size
, big_endian
>* target
,
10341 Sized_relobj_file
<size
, big_endian
>* object
,
10342 unsigned int data_shndx
,
10343 Output_section
* output_section
,
10344 const Relatype
* rela
,
10345 const Reltype
* rel
,
10346 unsigned int rel_type
,
10347 unsigned int r_type
,
10348 const elfcpp::Sym
<size
, big_endian
>& lsym
,
10354 Mips_address r_offset
;
10355 unsigned int r_sym
;
10356 typename
elfcpp::Elf_types
<size
>::Elf_Swxword r_addend
;
10358 if (rel_type
== elfcpp::SHT_RELA
)
10360 r_offset
= rela
->get_r_offset();
10361 r_sym
= Mips_classify_reloc
<elfcpp::SHT_RELA
, size
, big_endian
>::
10363 r_addend
= rela
->get_r_addend();
10367 r_offset
= rel
->get_r_offset();
10368 r_sym
= Mips_classify_reloc
<elfcpp::SHT_REL
, size
, big_endian
>::
10373 Mips_relobj
<size
, big_endian
>* mips_obj
=
10374 Mips_relobj
<size
, big_endian
>::as_mips_relobj(object
);
10376 if (mips_obj
->is_mips16_stub_section(data_shndx
))
10378 mips_obj
->get_mips16_stub_section(data_shndx
)
10379 ->new_local_reloc_found(r_type
, r_sym
);
10382 if (r_type
== elfcpp::R_MIPS_NONE
)
10383 // R_MIPS_NONE is used in mips16 stub sections, to define the target of the
10387 if (!mips16_call_reloc(r_type
)
10388 && !mips_obj
->section_allows_mips16_refs(data_shndx
))
10389 // This reloc would need to refer to a MIPS16 hard-float stub, if
10390 // there is one. We ignore MIPS16 stub sections and .pdr section when
10391 // looking for relocs that would need to refer to MIPS16 stubs.
10392 mips_obj
->add_local_non_16bit_call(r_sym
);
10394 if (r_type
== elfcpp::R_MIPS16_26
10395 && !mips_obj
->section_allows_mips16_refs(data_shndx
))
10396 mips_obj
->add_local_16bit_call(r_sym
);
10400 case elfcpp::R_MIPS_GOT16
:
10401 case elfcpp::R_MIPS_CALL16
:
10402 case elfcpp::R_MIPS_CALL_HI16
:
10403 case elfcpp::R_MIPS_CALL_LO16
:
10404 case elfcpp::R_MIPS_GOT_HI16
:
10405 case elfcpp::R_MIPS_GOT_LO16
:
10406 case elfcpp::R_MIPS_GOT_PAGE
:
10407 case elfcpp::R_MIPS_GOT_OFST
:
10408 case elfcpp::R_MIPS_GOT_DISP
:
10409 case elfcpp::R_MIPS_TLS_GOTTPREL
:
10410 case elfcpp::R_MIPS_TLS_GD
:
10411 case elfcpp::R_MIPS_TLS_LDM
:
10412 case elfcpp::R_MIPS16_GOT16
:
10413 case elfcpp::R_MIPS16_CALL16
:
10414 case elfcpp::R_MIPS16_TLS_GOTTPREL
:
10415 case elfcpp::R_MIPS16_TLS_GD
:
10416 case elfcpp::R_MIPS16_TLS_LDM
:
10417 case elfcpp::R_MICROMIPS_GOT16
:
10418 case elfcpp::R_MICROMIPS_CALL16
:
10419 case elfcpp::R_MICROMIPS_CALL_HI16
:
10420 case elfcpp::R_MICROMIPS_CALL_LO16
:
10421 case elfcpp::R_MICROMIPS_GOT_HI16
:
10422 case elfcpp::R_MICROMIPS_GOT_LO16
:
10423 case elfcpp::R_MICROMIPS_GOT_PAGE
:
10424 case elfcpp::R_MICROMIPS_GOT_OFST
:
10425 case elfcpp::R_MICROMIPS_GOT_DISP
:
10426 case elfcpp::R_MICROMIPS_TLS_GOTTPREL
:
10427 case elfcpp::R_MICROMIPS_TLS_GD
:
10428 case elfcpp::R_MICROMIPS_TLS_LDM
:
10429 case elfcpp::R_MIPS_EH
:
10430 // We need a GOT section.
10431 target
->got_section(symtab
, layout
);
10438 if (call_lo16_reloc(r_type
)
10439 || got_lo16_reloc(r_type
)
10440 || got_disp_reloc(r_type
)
10441 || eh_reloc(r_type
))
10443 // We may need a local GOT entry for this relocation. We
10444 // don't count R_MIPS_GOT_PAGE because we can estimate the
10445 // maximum number of pages needed by looking at the size of
10446 // the segment. Similar comments apply to R_MIPS*_GOT16 and
10447 // R_MIPS*_CALL16. We don't count R_MIPS_GOT_HI16, or
10448 // R_MIPS_CALL_HI16 because these are always followed by an
10449 // R_MIPS_GOT_LO16 or R_MIPS_CALL_LO16.
10450 Mips_output_data_got
<size
, big_endian
>* got
=
10451 target
->got_section(symtab
, layout
);
10452 bool is_section_symbol
= lsym
.get_st_type() == elfcpp::STT_SECTION
;
10453 got
->record_local_got_symbol(mips_obj
, r_sym
, r_addend
, r_type
, -1U,
10454 is_section_symbol
);
10459 case elfcpp::R_MIPS_CALL16
:
10460 case elfcpp::R_MIPS16_CALL16
:
10461 case elfcpp::R_MICROMIPS_CALL16
:
10462 gold_error(_("CALL16 reloc at 0x%lx not against global symbol "),
10463 (unsigned long)r_offset
);
10466 case elfcpp::R_MIPS_GOT_PAGE
:
10467 case elfcpp::R_MICROMIPS_GOT_PAGE
:
10468 case elfcpp::R_MIPS16_GOT16
:
10469 case elfcpp::R_MIPS_GOT16
:
10470 case elfcpp::R_MIPS_GOT_HI16
:
10471 case elfcpp::R_MIPS_GOT_LO16
:
10472 case elfcpp::R_MICROMIPS_GOT16
:
10473 case elfcpp::R_MICROMIPS_GOT_HI16
:
10474 case elfcpp::R_MICROMIPS_GOT_LO16
:
10476 // This relocation needs a page entry in the GOT.
10477 // Get the section contents.
10478 section_size_type view_size
= 0;
10479 const unsigned char* view
= object
->section_contents(data_shndx
,
10480 &view_size
, false);
10483 Valtype32 val
= elfcpp::Swap
<32, big_endian
>::readval(view
);
10484 Valtype32 addend
= (rel_type
== elfcpp::SHT_REL
? val
& 0xffff
10487 if (rel_type
== elfcpp::SHT_REL
&& got16_reloc(r_type
))
10488 target
->got16_addends_
.push_back(got16_addend
<size
, big_endian
>(
10489 object
, data_shndx
, r_type
, r_sym
, addend
));
10491 target
->got_section()->record_got_page_entry(mips_obj
, r_sym
, addend
);
10495 case elfcpp::R_MIPS_HI16
:
10496 case elfcpp::R_MIPS_PCHI16
:
10497 case elfcpp::R_MIPS16_HI16
:
10498 case elfcpp::R_MICROMIPS_HI16
:
10499 // Record the reloc so that we can check whether the corresponding LO16
10501 if (rel_type
== elfcpp::SHT_REL
)
10502 target
->got16_addends_
.push_back(got16_addend
<size
, big_endian
>(
10503 object
, data_shndx
, r_type
, r_sym
, 0));
10506 case elfcpp::R_MIPS_LO16
:
10507 case elfcpp::R_MIPS_PCLO16
:
10508 case elfcpp::R_MIPS16_LO16
:
10509 case elfcpp::R_MICROMIPS_LO16
:
10511 if (rel_type
!= elfcpp::SHT_REL
)
10514 // Find corresponding GOT16/HI16 relocation.
10516 // According to the MIPS ELF ABI, the R_MIPS_LO16 relocation must
10517 // be immediately following. However, for the IRIX6 ABI, the next
10518 // relocation may be a composed relocation consisting of several
10519 // relocations for the same address. In that case, the R_MIPS_LO16
10520 // relocation may occur as one of these. We permit a similar
10521 // extension in general, as that is useful for GCC.
10523 // In some cases GCC dead code elimination removes the LO16 but
10524 // keeps the corresponding HI16. This is strictly speaking a
10525 // violation of the ABI but not immediately harmful.
10527 typename
std::list
<got16_addend
<size
, big_endian
> >::iterator it
=
10528 target
->got16_addends_
.begin();
10529 while (it
!= target
->got16_addends_
.end())
10531 got16_addend
<size
, big_endian
> _got16_addend
= *it
;
10533 // TODO(sasa): Split got16_addends_ list into two lists - one for
10534 // GOT16 relocs and the other for HI16 relocs.
10536 // Report an error if we find HI16 or GOT16 reloc from the
10537 // previous section without the matching LO16 part.
10538 if (_got16_addend
.object
!= object
10539 || _got16_addend
.shndx
!= data_shndx
)
10541 gold_error("Can't find matching LO16 reloc");
10545 if (_got16_addend
.r_sym
!= r_sym
10546 || !is_matching_lo16_reloc(_got16_addend
.r_type
, r_type
))
10552 // We found a matching HI16 or GOT16 reloc for this LO16 reloc.
10553 // For GOT16, we need to calculate combined addend and record GOT page
10555 if (got16_reloc(_got16_addend
.r_type
))
10558 section_size_type view_size
= 0;
10559 const unsigned char* view
= object
->section_contents(data_shndx
,
10564 Valtype32 val
= elfcpp::Swap
<32, big_endian
>::readval(view
);
10565 int32_t addend
= Bits
<16>::sign_extend32(val
& 0xffff);
10567 addend
= (_got16_addend
.addend
<< 16) + addend
;
10568 target
->got_section()->record_got_page_entry(mips_obj
, r_sym
,
10572 it
= target
->got16_addends_
.erase(it
);
10580 case elfcpp::R_MIPS_32
:
10581 case elfcpp::R_MIPS_REL32
:
10582 case elfcpp::R_MIPS_64
:
10584 if (parameters
->options().output_is_position_independent())
10586 // If building a shared library (or a position-independent
10587 // executable), we need to create a dynamic relocation for
10589 if (is_readonly_section(output_section
))
10591 Reloc_section
* rel_dyn
= target
->rel_dyn_section(layout
);
10592 rel_dyn
->add_symbolless_local_addend(object
, r_sym
,
10593 elfcpp::R_MIPS_REL32
,
10594 output_section
, data_shndx
,
10600 case elfcpp::R_MIPS_TLS_GOTTPREL
:
10601 case elfcpp::R_MIPS16_TLS_GOTTPREL
:
10602 case elfcpp::R_MICROMIPS_TLS_GOTTPREL
:
10603 case elfcpp::R_MIPS_TLS_LDM
:
10604 case elfcpp::R_MIPS16_TLS_LDM
:
10605 case elfcpp::R_MICROMIPS_TLS_LDM
:
10606 case elfcpp::R_MIPS_TLS_GD
:
10607 case elfcpp::R_MIPS16_TLS_GD
:
10608 case elfcpp::R_MICROMIPS_TLS_GD
:
10610 bool output_is_shared
= parameters
->options().shared();
10611 const tls::Tls_optimization optimized_type
10612 = Target_mips
<size
, big_endian
>::optimize_tls_reloc(
10613 !output_is_shared
, r_type
);
10616 case elfcpp::R_MIPS_TLS_GD
:
10617 case elfcpp::R_MIPS16_TLS_GD
:
10618 case elfcpp::R_MICROMIPS_TLS_GD
:
10619 if (optimized_type
== tls::TLSOPT_NONE
)
10621 // Create a pair of GOT entries for the module index and
10622 // dtv-relative offset.
10623 Mips_output_data_got
<size
, big_endian
>* got
=
10624 target
->got_section(symtab
, layout
);
10625 unsigned int shndx
= lsym
.get_st_shndx();
10627 shndx
= object
->adjust_sym_shndx(r_sym
, shndx
, &is_ordinary
);
10630 object
->error(_("local symbol %u has bad shndx %u"),
10634 got
->record_local_got_symbol(mips_obj
, r_sym
, r_addend
, r_type
,
10639 // FIXME: TLS optimization not supported yet.
10640 gold_unreachable();
10644 case elfcpp::R_MIPS_TLS_LDM
:
10645 case elfcpp::R_MIPS16_TLS_LDM
:
10646 case elfcpp::R_MICROMIPS_TLS_LDM
:
10647 if (optimized_type
== tls::TLSOPT_NONE
)
10649 // We always record LDM symbols as local with index 0.
10650 target
->got_section()->record_local_got_symbol(mips_obj
, 0,
10656 // FIXME: TLS optimization not supported yet.
10657 gold_unreachable();
10660 case elfcpp::R_MIPS_TLS_GOTTPREL
:
10661 case elfcpp::R_MIPS16_TLS_GOTTPREL
:
10662 case elfcpp::R_MICROMIPS_TLS_GOTTPREL
:
10663 layout
->set_has_static_tls();
10664 if (optimized_type
== tls::TLSOPT_NONE
)
10666 // Create a GOT entry for the tp-relative offset.
10667 Mips_output_data_got
<size
, big_endian
>* got
=
10668 target
->got_section(symtab
, layout
);
10669 got
->record_local_got_symbol(mips_obj
, r_sym
, r_addend
, r_type
,
10674 // FIXME: TLS optimization not supported yet.
10675 gold_unreachable();
10680 gold_unreachable();
10689 // Refuse some position-dependent relocations when creating a
10690 // shared library. Do not refuse R_MIPS_32 / R_MIPS_64; they're
10691 // not PIC, but we can create dynamic relocations and the result
10692 // will be fine. Also do not refuse R_MIPS_LO16, which can be
10693 // combined with R_MIPS_GOT16.
10694 if (parameters
->options().shared())
10698 case elfcpp::R_MIPS16_HI16
:
10699 case elfcpp::R_MIPS_HI16
:
10700 case elfcpp::R_MIPS_HIGHER
:
10701 case elfcpp::R_MIPS_HIGHEST
:
10702 case elfcpp::R_MICROMIPS_HI16
:
10703 case elfcpp::R_MICROMIPS_HIGHER
:
10704 case elfcpp::R_MICROMIPS_HIGHEST
:
10705 // Don't refuse a high part relocation if it's against
10706 // no symbol (e.g. part of a compound relocation).
10711 case elfcpp::R_MIPS16_26
:
10712 case elfcpp::R_MIPS_26
:
10713 case elfcpp::R_MICROMIPS_26_S1
:
10714 gold_error(_("%s: relocation %u against `%s' can not be used when "
10715 "making a shared object; recompile with -fPIC"),
10716 object
->name().c_str(), r_type
, "a local symbol");
10723 template<int size
, bool big_endian
>
10725 Target_mips
<size
, big_endian
>::Scan::local(
10726 Symbol_table
* symtab
,
10728 Target_mips
<size
, big_endian
>* target
,
10729 Sized_relobj_file
<size
, big_endian
>* object
,
10730 unsigned int data_shndx
,
10731 Output_section
* output_section
,
10732 const Reltype
& reloc
,
10733 unsigned int r_type
,
10734 const elfcpp::Sym
<size
, big_endian
>& lsym
,
10747 (const Relatype
*) NULL
,
10751 lsym
, is_discarded
);
10755 template<int size
, bool big_endian
>
10757 Target_mips
<size
, big_endian
>::Scan::local(
10758 Symbol_table
* symtab
,
10760 Target_mips
<size
, big_endian
>* target
,
10761 Sized_relobj_file
<size
, big_endian
>* object
,
10762 unsigned int data_shndx
,
10763 Output_section
* output_section
,
10764 const Relatype
& reloc
,
10765 unsigned int r_type
,
10766 const elfcpp::Sym
<size
, big_endian
>& lsym
,
10780 (const Reltype
*) NULL
,
10783 lsym
, is_discarded
);
10786 // Scan a relocation for a global symbol.
10788 template<int size
, bool big_endian
>
10790 Target_mips
<size
, big_endian
>::Scan::global(
10791 Symbol_table
* symtab
,
10793 Target_mips
<size
, big_endian
>* target
,
10794 Sized_relobj_file
<size
, big_endian
>* object
,
10795 unsigned int data_shndx
,
10796 Output_section
* output_section
,
10797 const Relatype
* rela
,
10798 const Reltype
* rel
,
10799 unsigned int rel_type
,
10800 unsigned int r_type
,
10803 Mips_address r_offset
;
10804 unsigned int r_sym
;
10805 typename
elfcpp::Elf_types
<size
>::Elf_Swxword r_addend
;
10807 if (rel_type
== elfcpp::SHT_RELA
)
10809 r_offset
= rela
->get_r_offset();
10810 r_sym
= Mips_classify_reloc
<elfcpp::SHT_RELA
, size
, big_endian
>::
10812 r_addend
= rela
->get_r_addend();
10816 r_offset
= rel
->get_r_offset();
10817 r_sym
= Mips_classify_reloc
<elfcpp::SHT_REL
, size
, big_endian
>::
10822 Mips_relobj
<size
, big_endian
>* mips_obj
=
10823 Mips_relobj
<size
, big_endian
>::as_mips_relobj(object
);
10824 Mips_symbol
<size
>* mips_sym
= Mips_symbol
<size
>::as_mips_sym(gsym
);
10826 if (mips_obj
->is_mips16_stub_section(data_shndx
))
10828 mips_obj
->get_mips16_stub_section(data_shndx
)
10829 ->new_global_reloc_found(r_type
, mips_sym
);
10832 if (r_type
== elfcpp::R_MIPS_NONE
)
10833 // R_MIPS_NONE is used in mips16 stub sections, to define the target of the
10837 if (!mips16_call_reloc(r_type
)
10838 && !mips_obj
->section_allows_mips16_refs(data_shndx
))
10839 // This reloc would need to refer to a MIPS16 hard-float stub, if
10840 // there is one. We ignore MIPS16 stub sections and .pdr section when
10841 // looking for relocs that would need to refer to MIPS16 stubs.
10842 mips_sym
->set_need_fn_stub();
10844 // We need PLT entries if there are static-only relocations against
10845 // an externally-defined function. This can technically occur for
10846 // shared libraries if there are branches to the symbol, although it
10847 // is unlikely that this will be used in practice due to the short
10848 // ranges involved. It can occur for any relative or absolute relocation
10849 // in executables; in that case, the PLT entry becomes the function's
10850 // canonical address.
10851 bool static_reloc
= false;
10853 // Set CAN_MAKE_DYNAMIC to true if we can convert this
10854 // relocation into a dynamic one.
10855 bool can_make_dynamic
= false;
10858 case elfcpp::R_MIPS_GOT16
:
10859 case elfcpp::R_MIPS_CALL16
:
10860 case elfcpp::R_MIPS_CALL_HI16
:
10861 case elfcpp::R_MIPS_CALL_LO16
:
10862 case elfcpp::R_MIPS_GOT_HI16
:
10863 case elfcpp::R_MIPS_GOT_LO16
:
10864 case elfcpp::R_MIPS_GOT_PAGE
:
10865 case elfcpp::R_MIPS_GOT_OFST
:
10866 case elfcpp::R_MIPS_GOT_DISP
:
10867 case elfcpp::R_MIPS_TLS_GOTTPREL
:
10868 case elfcpp::R_MIPS_TLS_GD
:
10869 case elfcpp::R_MIPS_TLS_LDM
:
10870 case elfcpp::R_MIPS16_GOT16
:
10871 case elfcpp::R_MIPS16_CALL16
:
10872 case elfcpp::R_MIPS16_TLS_GOTTPREL
:
10873 case elfcpp::R_MIPS16_TLS_GD
:
10874 case elfcpp::R_MIPS16_TLS_LDM
:
10875 case elfcpp::R_MICROMIPS_GOT16
:
10876 case elfcpp::R_MICROMIPS_CALL16
:
10877 case elfcpp::R_MICROMIPS_CALL_HI16
:
10878 case elfcpp::R_MICROMIPS_CALL_LO16
:
10879 case elfcpp::R_MICROMIPS_GOT_HI16
:
10880 case elfcpp::R_MICROMIPS_GOT_LO16
:
10881 case elfcpp::R_MICROMIPS_GOT_PAGE
:
10882 case elfcpp::R_MICROMIPS_GOT_OFST
:
10883 case elfcpp::R_MICROMIPS_GOT_DISP
:
10884 case elfcpp::R_MICROMIPS_TLS_GOTTPREL
:
10885 case elfcpp::R_MICROMIPS_TLS_GD
:
10886 case elfcpp::R_MICROMIPS_TLS_LDM
:
10887 case elfcpp::R_MIPS_EH
:
10888 // We need a GOT section.
10889 target
->got_section(symtab
, layout
);
10892 // This is just a hint; it can safely be ignored. Don't set
10893 // has_static_relocs for the corresponding symbol.
10894 case elfcpp::R_MIPS_JALR
:
10895 case elfcpp::R_MICROMIPS_JALR
:
10898 case elfcpp::R_MIPS_GPREL16
:
10899 case elfcpp::R_MIPS_GPREL32
:
10900 case elfcpp::R_MIPS16_GPREL
:
10901 case elfcpp::R_MICROMIPS_GPREL16
:
10903 // GP-relative relocations always resolve to a definition in a
10904 // regular input file, ignoring the one-definition rule. This is
10905 // important for the GP setup sequence in NewABI code, which
10906 // always resolves to a local function even if other relocations
10907 // against the symbol wouldn't.
10908 //constrain_symbol_p = FALSE;
10911 case elfcpp::R_MIPS_32
:
10912 case elfcpp::R_MIPS_REL32
:
10913 case elfcpp::R_MIPS_64
:
10914 if ((parameters
->options().shared()
10915 || (strcmp(gsym
->name(), "__gnu_local_gp") != 0
10916 && (!is_readonly_section(output_section
)
10917 || mips_obj
->is_pic())))
10918 && (output_section
->flags() & elfcpp::SHF_ALLOC
) != 0)
10920 if (r_type
!= elfcpp::R_MIPS_REL32
)
10921 mips_sym
->set_pointer_equality_needed();
10922 can_make_dynamic
= true;
10928 // Most static relocations require pointer equality, except
10930 mips_sym
->set_pointer_equality_needed();
10933 case elfcpp::R_MIPS_26
:
10934 case elfcpp::R_MIPS_PC16
:
10935 case elfcpp::R_MIPS_PC21_S2
:
10936 case elfcpp::R_MIPS_PC26_S2
:
10937 case elfcpp::R_MIPS16_26
:
10938 case elfcpp::R_MICROMIPS_26_S1
:
10939 case elfcpp::R_MICROMIPS_PC7_S1
:
10940 case elfcpp::R_MICROMIPS_PC10_S1
:
10941 case elfcpp::R_MICROMIPS_PC16_S1
:
10942 case elfcpp::R_MICROMIPS_PC23_S2
:
10943 static_reloc
= true;
10944 mips_sym
->set_has_static_relocs();
10948 // If there are call relocations against an externally-defined symbol,
10949 // see whether we can create a MIPS lazy-binding stub for it. We can
10950 // only do this if all references to the function are through call
10951 // relocations, and in that case, the traditional lazy-binding stubs
10952 // are much more efficient than PLT entries.
10955 case elfcpp::R_MIPS16_CALL16
:
10956 case elfcpp::R_MIPS_CALL16
:
10957 case elfcpp::R_MIPS_CALL_HI16
:
10958 case elfcpp::R_MIPS_CALL_LO16
:
10959 case elfcpp::R_MIPS_JALR
:
10960 case elfcpp::R_MICROMIPS_CALL16
:
10961 case elfcpp::R_MICROMIPS_CALL_HI16
:
10962 case elfcpp::R_MICROMIPS_CALL_LO16
:
10963 case elfcpp::R_MICROMIPS_JALR
:
10964 if (!mips_sym
->no_lazy_stub())
10966 if ((mips_sym
->needs_plt_entry() && mips_sym
->is_from_dynobj())
10967 // Calls from shared objects to undefined symbols of type
10968 // STT_NOTYPE need lazy-binding stub.
10969 || (mips_sym
->is_undefined() && parameters
->options().shared()))
10970 target
->mips_stubs_section(layout
)->make_entry(mips_sym
);
10975 // We must not create a stub for a symbol that has relocations
10976 // related to taking the function's address.
10977 mips_sym
->set_no_lazy_stub();
10978 target
->remove_lazy_stub_entry(mips_sym
);
10983 if (relocation_needs_la25_stub
<size
, big_endian
>(mips_obj
, r_type
,
10984 mips_sym
->is_mips16()))
10985 mips_sym
->set_has_nonpic_branches();
10987 // R_MIPS_HI16 against _gp_disp is used for $gp setup,
10988 // and has a special meaning.
10989 bool gp_disp_against_hi16
= (!mips_obj
->is_newabi()
10990 && strcmp(gsym
->name(), "_gp_disp") == 0
10991 && (hi16_reloc(r_type
) || lo16_reloc(r_type
)));
10992 if (static_reloc
&& gsym
->needs_plt_entry())
10994 target
->make_plt_entry(symtab
, layout
, mips_sym
, r_type
);
10996 // Since this is not a PC-relative relocation, we may be
10997 // taking the address of a function. In that case we need to
10998 // set the entry in the dynamic symbol table to the address of
11000 if (gsym
->is_from_dynobj() && !parameters
->options().shared())
11002 gsym
->set_needs_dynsym_value();
11003 // We distinguish between PLT entries and lazy-binding stubs by
11004 // giving the former an st_other value of STO_MIPS_PLT. Set the
11005 // flag if there are any relocations in the binary where pointer
11006 // equality matters.
11007 if (mips_sym
->pointer_equality_needed())
11008 mips_sym
->set_mips_plt();
11011 if ((static_reloc
|| can_make_dynamic
) && !gp_disp_against_hi16
)
11013 // Absolute addressing relocations.
11014 // Make a dynamic relocation if necessary.
11015 if (gsym
->needs_dynamic_reloc(Scan::get_reference_flags(r_type
)))
11017 if (gsym
->may_need_copy_reloc())
11019 target
->copy_reloc(symtab
, layout
, object
, data_shndx
,
11020 output_section
, gsym
, r_type
, r_offset
);
11022 else if (can_make_dynamic
)
11024 // Create .rel.dyn section.
11025 target
->rel_dyn_section(layout
);
11026 target
->dynamic_reloc(mips_sym
, elfcpp::R_MIPS_REL32
, mips_obj
,
11027 data_shndx
, output_section
, r_offset
);
11030 gold_error(_("non-dynamic relocations refer to dynamic symbol %s"),
11035 bool for_call
= false;
11038 case elfcpp::R_MIPS_CALL16
:
11039 case elfcpp::R_MIPS16_CALL16
:
11040 case elfcpp::R_MICROMIPS_CALL16
:
11041 case elfcpp::R_MIPS_CALL_HI16
:
11042 case elfcpp::R_MIPS_CALL_LO16
:
11043 case elfcpp::R_MICROMIPS_CALL_HI16
:
11044 case elfcpp::R_MICROMIPS_CALL_LO16
:
11048 case elfcpp::R_MIPS16_GOT16
:
11049 case elfcpp::R_MIPS_GOT16
:
11050 case elfcpp::R_MIPS_GOT_HI16
:
11051 case elfcpp::R_MIPS_GOT_LO16
:
11052 case elfcpp::R_MICROMIPS_GOT16
:
11053 case elfcpp::R_MICROMIPS_GOT_HI16
:
11054 case elfcpp::R_MICROMIPS_GOT_LO16
:
11055 case elfcpp::R_MIPS_GOT_DISP
:
11056 case elfcpp::R_MICROMIPS_GOT_DISP
:
11057 case elfcpp::R_MIPS_EH
:
11059 // The symbol requires a GOT entry.
11060 Mips_output_data_got
<size
, big_endian
>* got
=
11061 target
->got_section(symtab
, layout
);
11062 got
->record_global_got_symbol(mips_sym
, mips_obj
, r_type
, false,
11064 mips_sym
->set_global_got_area(GGA_NORMAL
);
11068 case elfcpp::R_MIPS_GOT_PAGE
:
11069 case elfcpp::R_MICROMIPS_GOT_PAGE
:
11071 // This relocation needs a page entry in the GOT.
11072 // Get the section contents.
11073 section_size_type view_size
= 0;
11074 const unsigned char* view
=
11075 object
->section_contents(data_shndx
, &view_size
, false);
11078 Valtype32 val
= elfcpp::Swap
<32, big_endian
>::readval(view
);
11079 Valtype32 addend
= (rel_type
== elfcpp::SHT_REL
? val
& 0xffff
11081 Mips_output_data_got
<size
, big_endian
>* got
=
11082 target
->got_section(symtab
, layout
);
11083 got
->record_got_page_entry(mips_obj
, r_sym
, addend
);
11085 // If this is a global, overridable symbol, GOT_PAGE will
11086 // decay to GOT_DISP, so we'll need a GOT entry for it.
11087 bool def_regular
= (mips_sym
->source() == Symbol::FROM_OBJECT
11088 && !mips_sym
->object()->is_dynamic()
11089 && !mips_sym
->is_undefined());
11091 || (parameters
->options().output_is_position_independent()
11092 && !parameters
->options().Bsymbolic()
11093 && !mips_sym
->is_forced_local()))
11095 got
->record_global_got_symbol(mips_sym
, mips_obj
, r_type
, false,
11097 mips_sym
->set_global_got_area(GGA_NORMAL
);
11102 case elfcpp::R_MIPS_TLS_GOTTPREL
:
11103 case elfcpp::R_MIPS16_TLS_GOTTPREL
:
11104 case elfcpp::R_MICROMIPS_TLS_GOTTPREL
:
11105 case elfcpp::R_MIPS_TLS_LDM
:
11106 case elfcpp::R_MIPS16_TLS_LDM
:
11107 case elfcpp::R_MICROMIPS_TLS_LDM
:
11108 case elfcpp::R_MIPS_TLS_GD
:
11109 case elfcpp::R_MIPS16_TLS_GD
:
11110 case elfcpp::R_MICROMIPS_TLS_GD
:
11112 const bool is_final
= gsym
->final_value_is_known();
11113 const tls::Tls_optimization optimized_type
=
11114 Target_mips
<size
, big_endian
>::optimize_tls_reloc(is_final
, r_type
);
11118 case elfcpp::R_MIPS_TLS_GD
:
11119 case elfcpp::R_MIPS16_TLS_GD
:
11120 case elfcpp::R_MICROMIPS_TLS_GD
:
11121 if (optimized_type
== tls::TLSOPT_NONE
)
11123 // Create a pair of GOT entries for the module index and
11124 // dtv-relative offset.
11125 Mips_output_data_got
<size
, big_endian
>* got
=
11126 target
->got_section(symtab
, layout
);
11127 got
->record_global_got_symbol(mips_sym
, mips_obj
, r_type
, false,
11132 // FIXME: TLS optimization not supported yet.
11133 gold_unreachable();
11137 case elfcpp::R_MIPS_TLS_LDM
:
11138 case elfcpp::R_MIPS16_TLS_LDM
:
11139 case elfcpp::R_MICROMIPS_TLS_LDM
:
11140 if (optimized_type
== tls::TLSOPT_NONE
)
11142 // We always record LDM symbols as local with index 0.
11143 target
->got_section()->record_local_got_symbol(mips_obj
, 0,
11149 // FIXME: TLS optimization not supported yet.
11150 gold_unreachable();
11153 case elfcpp::R_MIPS_TLS_GOTTPREL
:
11154 case elfcpp::R_MIPS16_TLS_GOTTPREL
:
11155 case elfcpp::R_MICROMIPS_TLS_GOTTPREL
:
11156 layout
->set_has_static_tls();
11157 if (optimized_type
== tls::TLSOPT_NONE
)
11159 // Create a GOT entry for the tp-relative offset.
11160 Mips_output_data_got
<size
, big_endian
>* got
=
11161 target
->got_section(symtab
, layout
);
11162 got
->record_global_got_symbol(mips_sym
, mips_obj
, r_type
, false,
11167 // FIXME: TLS optimization not supported yet.
11168 gold_unreachable();
11173 gold_unreachable();
11177 case elfcpp::R_MIPS_COPY
:
11178 case elfcpp::R_MIPS_JUMP_SLOT
:
11179 // These are relocations which should only be seen by the
11180 // dynamic linker, and should never be seen here.
11181 gold_error(_("%s: unexpected reloc %u in object file"),
11182 object
->name().c_str(), r_type
);
11189 // Refuse some position-dependent relocations when creating a
11190 // shared library. Do not refuse R_MIPS_32 / R_MIPS_64; they're
11191 // not PIC, but we can create dynamic relocations and the result
11192 // will be fine. Also do not refuse R_MIPS_LO16, which can be
11193 // combined with R_MIPS_GOT16.
11194 if (parameters
->options().shared())
11198 case elfcpp::R_MIPS16_HI16
:
11199 case elfcpp::R_MIPS_HI16
:
11200 case elfcpp::R_MIPS_HIGHER
:
11201 case elfcpp::R_MIPS_HIGHEST
:
11202 case elfcpp::R_MICROMIPS_HI16
:
11203 case elfcpp::R_MICROMIPS_HIGHER
:
11204 case elfcpp::R_MICROMIPS_HIGHEST
:
11205 // Don't refuse a high part relocation if it's against
11206 // no symbol (e.g. part of a compound relocation).
11210 // R_MIPS_HI16 against _gp_disp is used for $gp setup,
11211 // and has a special meaning.
11212 if (!mips_obj
->is_newabi() && strcmp(gsym
->name(), "_gp_disp") == 0)
11216 case elfcpp::R_MIPS16_26
:
11217 case elfcpp::R_MIPS_26
:
11218 case elfcpp::R_MICROMIPS_26_S1
:
11219 gold_error(_("%s: relocation %u against `%s' can not be used when "
11220 "making a shared object; recompile with -fPIC"),
11221 object
->name().c_str(), r_type
, gsym
->name());
11228 template<int size
, bool big_endian
>
11230 Target_mips
<size
, big_endian
>::Scan::global(
11231 Symbol_table
* symtab
,
11233 Target_mips
<size
, big_endian
>* target
,
11234 Sized_relobj_file
<size
, big_endian
>* object
,
11235 unsigned int data_shndx
,
11236 Output_section
* output_section
,
11237 const Relatype
& reloc
,
11238 unsigned int r_type
,
11249 (const Reltype
*) NULL
,
11255 template<int size
, bool big_endian
>
11257 Target_mips
<size
, big_endian
>::Scan::global(
11258 Symbol_table
* symtab
,
11260 Target_mips
<size
, big_endian
>* target
,
11261 Sized_relobj_file
<size
, big_endian
>* object
,
11262 unsigned int data_shndx
,
11263 Output_section
* output_section
,
11264 const Reltype
& reloc
,
11265 unsigned int r_type
,
11275 (const Relatype
*) NULL
,
11282 // Return whether a R_MIPS_32/R_MIPS64 relocation needs to be applied.
11283 // In cases where Scan::local() or Scan::global() has created
11284 // a dynamic relocation, the addend of the relocation is carried
11285 // in the data, and we must not apply the static relocation.
11287 template<int size
, bool big_endian
>
11289 Target_mips
<size
, big_endian
>::Relocate::should_apply_static_reloc(
11290 const Mips_symbol
<size
>* gsym
,
11291 unsigned int r_type
,
11292 Output_section
* output_section
,
11293 Target_mips
* target
)
11295 // If the output section is not allocated, then we didn't call
11296 // scan_relocs, we didn't create a dynamic reloc, and we must apply
11298 if ((output_section
->flags() & elfcpp::SHF_ALLOC
) == 0)
11305 // For global symbols, we use the same helper routines used in the
11307 if (gsym
->needs_dynamic_reloc(Scan::get_reference_flags(r_type
))
11308 && !gsym
->may_need_copy_reloc())
11310 // We have generated dynamic reloc (R_MIPS_REL32).
11312 bool multi_got
= false;
11313 if (target
->has_got_section())
11314 multi_got
= target
->got_section()->multi_got();
11315 bool has_got_offset
;
11317 has_got_offset
= gsym
->has_got_offset(GOT_TYPE_STANDARD
);
11319 has_got_offset
= gsym
->global_gotoffset() != -1U;
11320 if (!has_got_offset
)
11323 // Apply the relocation only if the symbol is in the local got.
11324 // Do not apply the relocation if the symbol is in the global
11326 return symbol_references_local(gsym
, gsym
->has_dynsym_index());
11329 // We have not generated dynamic reloc.
11334 // Perform a relocation.
11336 template<int size
, bool big_endian
>
11338 Target_mips
<size
, big_endian
>::Relocate::relocate(
11339 const Relocate_info
<size
, big_endian
>* relinfo
,
11340 unsigned int rel_type
,
11341 Target_mips
* target
,
11342 Output_section
* output_section
,
11344 const unsigned char* preloc
,
11345 const Sized_symbol
<size
>* gsym
,
11346 const Symbol_value
<size
>* psymval
,
11347 unsigned char* view
,
11348 Mips_address address
,
11351 Mips_address r_offset
;
11352 unsigned int r_sym
;
11353 unsigned int r_type
;
11354 unsigned int r_type2
;
11355 unsigned int r_type3
;
11356 unsigned char r_ssym
;
11357 typename
elfcpp::Elf_types
<size
>::Elf_Swxword r_addend
;
11359 if (rel_type
== elfcpp::SHT_RELA
)
11361 const Relatype
rela(preloc
);
11362 r_offset
= rela
.get_r_offset();
11363 r_sym
= Mips_classify_reloc
<elfcpp::SHT_RELA
, size
, big_endian
>::
11365 r_type
= Mips_classify_reloc
<elfcpp::SHT_RELA
, size
, big_endian
>::
11367 r_type2
= Mips_classify_reloc
<elfcpp::SHT_RELA
, size
, big_endian
>::
11368 get_r_type2(&rela
);
11369 r_type3
= Mips_classify_reloc
<elfcpp::SHT_RELA
, size
, big_endian
>::
11370 get_r_type3(&rela
);
11371 r_ssym
= Mips_classify_reloc
<elfcpp::SHT_RELA
, size
, big_endian
>::
11373 r_addend
= rela
.get_r_addend();
11377 const Reltype
rel(preloc
);
11378 r_offset
= rel
.get_r_offset();
11379 r_sym
= Mips_classify_reloc
<elfcpp::SHT_REL
, size
, big_endian
>::
11381 r_type
= Mips_classify_reloc
<elfcpp::SHT_REL
, size
, big_endian
>::
11389 typedef Mips_relocate_functions
<size
, big_endian
> Reloc_funcs
;
11390 typename
Reloc_funcs::Status reloc_status
= Reloc_funcs::STATUS_OKAY
;
11392 Mips_relobj
<size
, big_endian
>* object
=
11393 Mips_relobj
<size
, big_endian
>::as_mips_relobj(relinfo
->object
);
11395 bool target_is_16_bit_code
= false;
11396 bool target_is_micromips_code
= false;
11397 bool cross_mode_jump
;
11399 Symbol_value
<size
> symval
;
11401 const Mips_symbol
<size
>* mips_sym
= Mips_symbol
<size
>::as_mips_sym(gsym
);
11403 bool changed_symbol_value
= false;
11406 target_is_16_bit_code
= object
->local_symbol_is_mips16(r_sym
);
11407 target_is_micromips_code
= object
->local_symbol_is_micromips(r_sym
);
11408 if (target_is_16_bit_code
|| target_is_micromips_code
)
11410 // MIPS16/microMIPS text labels should be treated as odd.
11411 symval
.set_output_value(psymval
->value(object
, 1));
11413 changed_symbol_value
= true;
11418 target_is_16_bit_code
= mips_sym
->is_mips16();
11419 target_is_micromips_code
= mips_sym
->is_micromips();
11421 // If this is a mips16/microMIPS text symbol, add 1 to the value to make
11422 // it odd. This will cause something like .word SYM to come up with
11423 // the right value when it is loaded into the PC.
11425 if ((mips_sym
->is_mips16() || mips_sym
->is_micromips())
11426 && psymval
->value(object
, 0) != 0)
11428 symval
.set_output_value(psymval
->value(object
, 0) | 1);
11430 changed_symbol_value
= true;
11433 // Pick the value to use for symbols defined in shared objects.
11434 if (mips_sym
->use_plt_offset(Scan::get_reference_flags(r_type
))
11435 || mips_sym
->has_lazy_stub())
11437 Mips_address value
;
11438 if (!mips_sym
->has_lazy_stub())
11440 // Prefer a standard MIPS PLT entry.
11441 if (mips_sym
->has_mips_plt_offset())
11443 value
= target
->plt_section()->mips_entry_address(mips_sym
);
11444 target_is_micromips_code
= false;
11445 target_is_16_bit_code
= false;
11449 value
= (target
->plt_section()->comp_entry_address(mips_sym
)
11451 if (target
->is_output_micromips())
11452 target_is_micromips_code
= true;
11454 target_is_16_bit_code
= true;
11458 value
= target
->mips_stubs_section()->stub_address(mips_sym
);
11460 symval
.set_output_value(value
);
11465 // TRUE if the symbol referred to by this relocation is "_gp_disp".
11466 // Note that such a symbol must always be a global symbol.
11467 bool gp_disp
= (gsym
!= NULL
&& (strcmp(gsym
->name(), "_gp_disp") == 0)
11468 && !object
->is_newabi());
11470 // TRUE if the symbol referred to by this relocation is "__gnu_local_gp".
11471 // Note that such a symbol must always be a global symbol.
11472 bool gnu_local_gp
= gsym
&& (strcmp(gsym
->name(), "__gnu_local_gp") == 0);
11477 if (!hi16_reloc(r_type
) && !lo16_reloc(r_type
))
11478 gold_error_at_location(relinfo
, relnum
, r_offset
,
11479 _("relocations against _gp_disp are permitted only"
11480 " with R_MIPS_HI16 and R_MIPS_LO16 relocations."));
11482 else if (gnu_local_gp
)
11484 // __gnu_local_gp is _gp symbol.
11485 symval
.set_output_value(target
->adjusted_gp_value(object
));
11489 // If this is a reference to a 16-bit function with a stub, we need
11490 // to redirect the relocation to the stub unless:
11492 // (a) the relocation is for a MIPS16 JAL;
11494 // (b) the relocation is for a MIPS16 PIC call, and there are no
11495 // non-MIPS16 uses of the GOT slot; or
11497 // (c) the section allows direct references to MIPS16 functions.
11498 if (r_type
!= elfcpp::R_MIPS16_26
11499 && !parameters
->options().relocatable()
11500 && ((mips_sym
!= NULL
11501 && mips_sym
->has_mips16_fn_stub()
11502 && (r_type
!= elfcpp::R_MIPS16_CALL16
|| mips_sym
->need_fn_stub()))
11503 || (mips_sym
== NULL
11504 && object
->get_local_mips16_fn_stub(r_sym
) != NULL
))
11505 && !object
->section_allows_mips16_refs(relinfo
->data_shndx
))
11507 // This is a 32- or 64-bit call to a 16-bit function. We should
11508 // have already noticed that we were going to need the
11510 Mips_address value
;
11511 if (mips_sym
== NULL
)
11512 value
= object
->get_local_mips16_fn_stub(r_sym
)->output_address();
11515 gold_assert(mips_sym
->need_fn_stub());
11516 if (mips_sym
->has_la25_stub())
11517 value
= target
->la25_stub_section()->stub_address(mips_sym
);
11520 value
= mips_sym
->template
11521 get_mips16_fn_stub
<big_endian
>()->output_address();
11524 symval
.set_output_value(value
);
11526 changed_symbol_value
= true;
11528 // The target is 16-bit, but the stub isn't.
11529 target_is_16_bit_code
= false;
11531 // If this is a MIPS16 call with a stub, that is made through the PLT or
11532 // to a standard MIPS function, we need to redirect the call to the stub.
11533 // Note that we specifically exclude R_MIPS16_CALL16 from this behavior;
11534 // indirect calls should use an indirect stub instead.
11535 else if (r_type
== elfcpp::R_MIPS16_26
&& !parameters
->options().relocatable()
11536 && ((mips_sym
!= NULL
11537 && (mips_sym
->has_mips16_call_stub()
11538 || mips_sym
->has_mips16_call_fp_stub()))
11539 || (mips_sym
== NULL
11540 && object
->get_local_mips16_call_stub(r_sym
) != NULL
))
11541 && ((mips_sym
!= NULL
&& mips_sym
->has_plt_offset())
11542 || !target_is_16_bit_code
))
11544 Mips16_stub_section
<size
, big_endian
>* call_stub
;
11545 if (mips_sym
== NULL
)
11546 call_stub
= object
->get_local_mips16_call_stub(r_sym
);
11549 // If both call_stub and call_fp_stub are defined, we can figure
11550 // out which one to use by checking which one appears in the input
11552 if (mips_sym
->has_mips16_call_stub()
11553 && mips_sym
->has_mips16_call_fp_stub())
11556 for (unsigned int i
= 1; i
< object
->shnum(); ++i
)
11558 if (object
->is_mips16_call_fp_stub_section(i
))
11560 call_stub
= mips_sym
->template
11561 get_mips16_call_fp_stub
<big_endian
>();
11566 if (call_stub
== NULL
)
11568 mips_sym
->template get_mips16_call_stub
<big_endian
>();
11570 else if (mips_sym
->has_mips16_call_stub())
11571 call_stub
= mips_sym
->template get_mips16_call_stub
<big_endian
>();
11573 call_stub
= mips_sym
->template get_mips16_call_fp_stub
<big_endian
>();
11576 symval
.set_output_value(call_stub
->output_address());
11578 changed_symbol_value
= true;
11580 // If this is a direct call to a PIC function, redirect to the
11582 else if (mips_sym
!= NULL
11583 && mips_sym
->has_la25_stub()
11584 && relocation_needs_la25_stub
<size
, big_endian
>(
11585 object
, r_type
, target_is_16_bit_code
))
11587 Mips_address value
= target
->la25_stub_section()->stub_address(mips_sym
);
11588 if (mips_sym
->is_micromips())
11590 symval
.set_output_value(value
);
11593 // For direct MIPS16 and microMIPS calls make sure the compressed PLT
11594 // entry is used if a standard PLT entry has also been made.
11595 else if ((r_type
== elfcpp::R_MIPS16_26
11596 || r_type
== elfcpp::R_MICROMIPS_26_S1
)
11597 && !parameters
->options().relocatable()
11598 && mips_sym
!= NULL
11599 && mips_sym
->has_plt_offset()
11600 && mips_sym
->has_comp_plt_offset()
11601 && mips_sym
->has_mips_plt_offset())
11603 Mips_address value
= (target
->plt_section()->comp_entry_address(mips_sym
)
11605 symval
.set_output_value(value
);
11608 target_is_16_bit_code
= !target
->is_output_micromips();
11609 target_is_micromips_code
= target
->is_output_micromips();
11612 // Make sure MIPS16 and microMIPS are not used together.
11613 if ((r_type
== elfcpp::R_MIPS16_26
&& target_is_micromips_code
)
11614 || (micromips_branch_reloc(r_type
) && target_is_16_bit_code
))
11616 gold_error(_("MIPS16 and microMIPS functions cannot call each other"));
11619 // Calls from 16-bit code to 32-bit code and vice versa require the
11620 // mode change. However, we can ignore calls to undefined weak symbols,
11621 // which should never be executed at runtime. This exception is important
11622 // because the assembly writer may have "known" that any definition of the
11623 // symbol would be 16-bit code, and that direct jumps were therefore
11626 (!parameters
->options().relocatable()
11627 && !(gsym
!= NULL
&& gsym
->is_weak_undefined())
11628 && ((r_type
== elfcpp::R_MIPS16_26
&& !target_is_16_bit_code
)
11629 || (r_type
== elfcpp::R_MICROMIPS_26_S1
&& !target_is_micromips_code
)
11630 || ((r_type
== elfcpp::R_MIPS_26
|| r_type
== elfcpp::R_MIPS_JALR
)
11631 && (target_is_16_bit_code
|| target_is_micromips_code
))));
11633 bool local
= (mips_sym
== NULL
11634 || (mips_sym
->got_only_for_calls()
11635 ? symbol_calls_local(mips_sym
, mips_sym
->has_dynsym_index())
11636 : symbol_references_local(mips_sym
,
11637 mips_sym
->has_dynsym_index())));
11639 // Global R_MIPS_GOT_PAGE/R_MICROMIPS_GOT_PAGE relocations are equivalent
11640 // to R_MIPS_GOT_DISP/R_MICROMIPS_GOT_DISP. The addend is applied by the
11641 // corresponding R_MIPS_GOT_OFST/R_MICROMIPS_GOT_OFST.
11642 if (got_page_reloc(r_type
) && !local
)
11643 r_type
= (micromips_reloc(r_type
) ? elfcpp::R_MICROMIPS_GOT_DISP
11644 : elfcpp::R_MIPS_GOT_DISP
);
11646 unsigned int got_offset
= 0;
11649 bool calculate_only
= false;
11650 Valtype calculated_value
= 0;
11651 bool extract_addend
= rel_type
== elfcpp::SHT_REL
;
11652 unsigned int r_types
[3] = { r_type
, r_type2
, r_type3
};
11654 Reloc_funcs::mips_reloc_unshuffle(view
, r_type
, false);
11656 // For Mips64 N64 ABI, there may be up to three operations specified per
11657 // record, by the fields r_type, r_type2, and r_type3. The first operation
11658 // takes its addend from the relocation record. Each subsequent operation
11659 // takes as its addend the result of the previous operation.
11660 // The first operation in a record which references a symbol uses the symbol
11661 // implied by r_sym. The next operation in a record which references a symbol
11662 // uses the special symbol value given by the r_ssym field. A third operation
11663 // in a record which references a symbol will assume a NULL symbol,
11664 // i.e. value zero.
11667 // Check if a record references to a symbol.
11668 for (unsigned int i
= 0; i
< 3; ++i
)
11670 if (r_types
[i
] == elfcpp::R_MIPS_NONE
)
11674 // Check if the next relocation is for the same instruction.
11675 calculate_only
= i
== 2 ? false
11676 : r_types
[i
+1] != elfcpp::R_MIPS_NONE
;
11678 if (object
->is_n64())
11682 // Handle special symbol for r_type2 relocation type.
11686 symval
.set_output_value(0);
11689 symval
.set_output_value(target
->gp_value());
11692 symval
.set_output_value(object
->gp_value());
11695 symval
.set_output_value(address
);
11698 gold_unreachable();
11704 // For r_type3 symbol value is 0.
11705 symval
.set_output_value(0);
11709 bool update_got_entry
= false;
11710 switch (r_types
[i
])
11712 case elfcpp::R_MIPS_NONE
:
11714 case elfcpp::R_MIPS_16
:
11715 reloc_status
= Reloc_funcs::rel16(view
, object
, psymval
, r_addend
,
11716 extract_addend
, calculate_only
,
11717 &calculated_value
);
11720 case elfcpp::R_MIPS_32
:
11721 if (should_apply_static_reloc(mips_sym
, r_types
[i
], output_section
,
11723 reloc_status
= Reloc_funcs::rel32(view
, object
, psymval
, r_addend
,
11724 extract_addend
, calculate_only
,
11725 &calculated_value
);
11726 if (mips_sym
!= NULL
11727 && (mips_sym
->is_mips16() || mips_sym
->is_micromips())
11728 && mips_sym
->global_got_area() == GGA_RELOC_ONLY
)
11730 // If mips_sym->has_mips16_fn_stub() is false, symbol value is
11731 // already updated by adding +1.
11732 if (mips_sym
->has_mips16_fn_stub())
11734 gold_assert(mips_sym
->need_fn_stub());
11735 Mips16_stub_section
<size
, big_endian
>* fn_stub
=
11736 mips_sym
->template get_mips16_fn_stub
<big_endian
>();
11738 symval
.set_output_value(fn_stub
->output_address());
11741 got_offset
= mips_sym
->global_gotoffset();
11742 update_got_entry
= true;
11746 case elfcpp::R_MIPS_64
:
11747 if (should_apply_static_reloc(mips_sym
, r_types
[i
], output_section
,
11749 reloc_status
= Reloc_funcs::rel64(view
, object
, psymval
, r_addend
,
11750 extract_addend
, calculate_only
,
11751 &calculated_value
, false);
11752 else if (target
->is_output_n64() && r_addend
!= 0)
11753 // Only apply the addend. The static relocation was RELA, but the
11754 // dynamic relocation is REL, so we need to apply the addend.
11755 reloc_status
= Reloc_funcs::rel64(view
, object
, psymval
, r_addend
,
11756 extract_addend
, calculate_only
,
11757 &calculated_value
, true);
11759 case elfcpp::R_MIPS_REL32
:
11760 gold_unreachable();
11762 case elfcpp::R_MIPS_PC32
:
11763 reloc_status
= Reloc_funcs::relpc32(view
, object
, psymval
, address
,
11764 r_addend
, extract_addend
,
11766 &calculated_value
);
11769 case elfcpp::R_MIPS16_26
:
11770 // The calculation for R_MIPS16_26 is just the same as for an
11771 // R_MIPS_26. It's only the storage of the relocated field into
11772 // the output file that's different. So, we just fall through to the
11773 // R_MIPS_26 case here.
11774 case elfcpp::R_MIPS_26
:
11775 case elfcpp::R_MICROMIPS_26_S1
:
11776 reloc_status
= Reloc_funcs::rel26(view
, object
, psymval
, address
,
11777 gsym
== NULL
, r_addend
, extract_addend
, gsym
, cross_mode_jump
,
11778 r_types
[i
], target
->jal_to_bal(), calculate_only
,
11779 &calculated_value
);
11782 case elfcpp::R_MIPS_HI16
:
11783 case elfcpp::R_MIPS16_HI16
:
11784 case elfcpp::R_MICROMIPS_HI16
:
11785 if (rel_type
== elfcpp::SHT_RELA
)
11786 reloc_status
= Reloc_funcs::do_relhi16(view
, object
, psymval
,
11788 gp_disp
, r_types
[i
],
11790 target
, calculate_only
,
11791 &calculated_value
);
11792 else if (rel_type
== elfcpp::SHT_REL
)
11793 reloc_status
= Reloc_funcs::relhi16(view
, object
, psymval
, r_addend
,
11794 address
, gp_disp
, r_types
[i
],
11795 r_sym
, extract_addend
);
11797 gold_unreachable();
11800 case elfcpp::R_MIPS_LO16
:
11801 case elfcpp::R_MIPS16_LO16
:
11802 case elfcpp::R_MICROMIPS_LO16
:
11803 case elfcpp::R_MICROMIPS_HI0_LO16
:
11804 reloc_status
= Reloc_funcs::rello16(target
, view
, object
, psymval
,
11805 r_addend
, extract_addend
, address
,
11806 gp_disp
, r_types
[i
], r_sym
,
11807 rel_type
, calculate_only
,
11808 &calculated_value
);
11811 case elfcpp::R_MIPS_LITERAL
:
11812 case elfcpp::R_MICROMIPS_LITERAL
:
11813 // Because we don't merge literal sections, we can handle this
11814 // just like R_MIPS_GPREL16. In the long run, we should merge
11815 // shared literals, and then we will need to additional work
11820 case elfcpp::R_MIPS_GPREL16
:
11821 case elfcpp::R_MIPS16_GPREL
:
11822 case elfcpp::R_MICROMIPS_GPREL7_S2
:
11823 case elfcpp::R_MICROMIPS_GPREL16
:
11824 reloc_status
= Reloc_funcs::relgprel(view
, object
, psymval
,
11825 target
->adjusted_gp_value(object
),
11826 r_addend
, extract_addend
,
11827 gsym
== NULL
, r_types
[i
],
11828 calculate_only
, &calculated_value
);
11831 case elfcpp::R_MIPS_PC16
:
11832 reloc_status
= Reloc_funcs::relpc16(view
, object
, psymval
, address
,
11833 r_addend
, extract_addend
,
11835 &calculated_value
);
11838 case elfcpp::R_MIPS_PC21_S2
:
11839 reloc_status
= Reloc_funcs::relpc21(view
, object
, psymval
, address
,
11840 r_addend
, extract_addend
,
11842 &calculated_value
);
11845 case elfcpp::R_MIPS_PC26_S2
:
11846 reloc_status
= Reloc_funcs::relpc26(view
, object
, psymval
, address
,
11847 r_addend
, extract_addend
,
11849 &calculated_value
);
11852 case elfcpp::R_MIPS_PC18_S3
:
11853 reloc_status
= Reloc_funcs::relpc18(view
, object
, psymval
, address
,
11854 r_addend
, extract_addend
,
11856 &calculated_value
);
11859 case elfcpp::R_MIPS_PC19_S2
:
11860 reloc_status
= Reloc_funcs::relpc19(view
, object
, psymval
, address
,
11861 r_addend
, extract_addend
,
11863 &calculated_value
);
11866 case elfcpp::R_MIPS_PCHI16
:
11867 if (rel_type
== elfcpp::SHT_RELA
)
11868 reloc_status
= Reloc_funcs::do_relpchi16(view
, object
, psymval
,
11872 &calculated_value
);
11873 else if (rel_type
== elfcpp::SHT_REL
)
11874 reloc_status
= Reloc_funcs::relpchi16(view
, object
, psymval
,
11875 r_addend
, address
, r_sym
,
11878 gold_unreachable();
11881 case elfcpp::R_MIPS_PCLO16
:
11882 reloc_status
= Reloc_funcs::relpclo16(view
, object
, psymval
, r_addend
,
11883 extract_addend
, address
, r_sym
,
11884 rel_type
, calculate_only
,
11885 &calculated_value
);
11887 case elfcpp::R_MICROMIPS_PC7_S1
:
11888 reloc_status
= Reloc_funcs::relmicromips_pc7_s1(view
, object
, psymval
,
11892 &calculated_value
);
11894 case elfcpp::R_MICROMIPS_PC10_S1
:
11895 reloc_status
= Reloc_funcs::relmicromips_pc10_s1(view
, object
,
11897 r_addend
, extract_addend
,
11899 &calculated_value
);
11901 case elfcpp::R_MICROMIPS_PC16_S1
:
11902 reloc_status
= Reloc_funcs::relmicromips_pc16_s1(view
, object
,
11904 r_addend
, extract_addend
,
11906 &calculated_value
);
11908 case elfcpp::R_MIPS_GPREL32
:
11909 reloc_status
= Reloc_funcs::relgprel32(view
, object
, psymval
,
11910 target
->adjusted_gp_value(object
),
11911 r_addend
, extract_addend
,
11913 &calculated_value
);
11915 case elfcpp::R_MIPS_GOT_HI16
:
11916 case elfcpp::R_MIPS_CALL_HI16
:
11917 case elfcpp::R_MICROMIPS_GOT_HI16
:
11918 case elfcpp::R_MICROMIPS_CALL_HI16
:
11920 got_offset
= target
->got_section()->got_offset(gsym
,
11924 got_offset
= target
->got_section()->got_offset(r_sym
,
11927 gp_offset
= target
->got_section()->gp_offset(got_offset
, object
);
11928 reloc_status
= Reloc_funcs::relgot_hi16(view
, gp_offset
,
11930 &calculated_value
);
11931 update_got_entry
= changed_symbol_value
;
11934 case elfcpp::R_MIPS_GOT_LO16
:
11935 case elfcpp::R_MIPS_CALL_LO16
:
11936 case elfcpp::R_MICROMIPS_GOT_LO16
:
11937 case elfcpp::R_MICROMIPS_CALL_LO16
:
11939 got_offset
= target
->got_section()->got_offset(gsym
,
11943 got_offset
= target
->got_section()->got_offset(r_sym
,
11946 gp_offset
= target
->got_section()->gp_offset(got_offset
, object
);
11947 reloc_status
= Reloc_funcs::relgot_lo16(view
, gp_offset
,
11949 &calculated_value
);
11950 update_got_entry
= changed_symbol_value
;
11953 case elfcpp::R_MIPS_GOT_DISP
:
11954 case elfcpp::R_MICROMIPS_GOT_DISP
:
11955 case elfcpp::R_MIPS_EH
:
11957 got_offset
= target
->got_section()->got_offset(gsym
,
11961 got_offset
= target
->got_section()->got_offset(r_sym
,
11964 gp_offset
= target
->got_section()->gp_offset(got_offset
, object
);
11965 if (eh_reloc(r_types
[i
]))
11966 reloc_status
= Reloc_funcs::releh(view
, gp_offset
,
11968 &calculated_value
);
11970 reloc_status
= Reloc_funcs::relgot(view
, gp_offset
,
11972 &calculated_value
);
11974 case elfcpp::R_MIPS_CALL16
:
11975 case elfcpp::R_MIPS16_CALL16
:
11976 case elfcpp::R_MICROMIPS_CALL16
:
11977 gold_assert(gsym
!= NULL
);
11978 got_offset
= target
->got_section()->got_offset(gsym
,
11981 gp_offset
= target
->got_section()->gp_offset(got_offset
, object
);
11982 reloc_status
= Reloc_funcs::relgot(view
, gp_offset
,
11983 calculate_only
, &calculated_value
);
11984 // TODO(sasa): We should also initialize update_got_entry
11985 // in other place swhere relgot is called.
11986 update_got_entry
= changed_symbol_value
;
11989 case elfcpp::R_MIPS_GOT16
:
11990 case elfcpp::R_MIPS16_GOT16
:
11991 case elfcpp::R_MICROMIPS_GOT16
:
11994 got_offset
= target
->got_section()->got_offset(gsym
,
11997 gp_offset
= target
->got_section()->gp_offset(got_offset
, object
);
11998 reloc_status
= Reloc_funcs::relgot(view
, gp_offset
,
12000 &calculated_value
);
12004 if (rel_type
== elfcpp::SHT_RELA
)
12005 reloc_status
= Reloc_funcs::do_relgot16_local(view
, object
,
12010 &calculated_value
);
12011 else if (rel_type
== elfcpp::SHT_REL
)
12012 reloc_status
= Reloc_funcs::relgot16_local(view
, object
,
12015 r_types
[i
], r_sym
);
12017 gold_unreachable();
12019 update_got_entry
= changed_symbol_value
;
12022 case elfcpp::R_MIPS_TLS_GD
:
12023 case elfcpp::R_MIPS16_TLS_GD
:
12024 case elfcpp::R_MICROMIPS_TLS_GD
:
12026 got_offset
= target
->got_section()->got_offset(gsym
,
12030 got_offset
= target
->got_section()->got_offset(r_sym
,
12033 gp_offset
= target
->got_section()->gp_offset(got_offset
, object
);
12034 reloc_status
= Reloc_funcs::relgot(view
, gp_offset
, calculate_only
,
12035 &calculated_value
);
12038 case elfcpp::R_MIPS_TLS_GOTTPREL
:
12039 case elfcpp::R_MIPS16_TLS_GOTTPREL
:
12040 case elfcpp::R_MICROMIPS_TLS_GOTTPREL
:
12042 got_offset
= target
->got_section()->got_offset(gsym
,
12043 GOT_TYPE_TLS_OFFSET
,
12046 got_offset
= target
->got_section()->got_offset(r_sym
,
12047 GOT_TYPE_TLS_OFFSET
,
12049 gp_offset
= target
->got_section()->gp_offset(got_offset
, object
);
12050 reloc_status
= Reloc_funcs::relgot(view
, gp_offset
, calculate_only
,
12051 &calculated_value
);
12054 case elfcpp::R_MIPS_TLS_LDM
:
12055 case elfcpp::R_MIPS16_TLS_LDM
:
12056 case elfcpp::R_MICROMIPS_TLS_LDM
:
12057 // Relocate the field with the offset of the GOT entry for
12058 // the module index.
12059 got_offset
= target
->got_section()->tls_ldm_offset(object
);
12060 gp_offset
= target
->got_section()->gp_offset(got_offset
, object
);
12061 reloc_status
= Reloc_funcs::relgot(view
, gp_offset
, calculate_only
,
12062 &calculated_value
);
12065 case elfcpp::R_MIPS_GOT_PAGE
:
12066 case elfcpp::R_MICROMIPS_GOT_PAGE
:
12067 reloc_status
= Reloc_funcs::relgotpage(target
, view
, object
, psymval
,
12068 r_addend
, extract_addend
,
12070 &calculated_value
);
12073 case elfcpp::R_MIPS_GOT_OFST
:
12074 case elfcpp::R_MICROMIPS_GOT_OFST
:
12075 reloc_status
= Reloc_funcs::relgotofst(target
, view
, object
, psymval
,
12076 r_addend
, extract_addend
,
12077 local
, calculate_only
,
12078 &calculated_value
);
12081 case elfcpp::R_MIPS_JALR
:
12082 case elfcpp::R_MICROMIPS_JALR
:
12083 // This relocation is only a hint. In some cases, we optimize
12084 // it into a bal instruction. But we don't try to optimize
12085 // when the symbol does not resolve locally.
12087 || symbol_calls_local(gsym
, gsym
->has_dynsym_index()))
12088 reloc_status
= Reloc_funcs::reljalr(view
, object
, psymval
, address
,
12089 r_addend
, extract_addend
,
12090 cross_mode_jump
, r_types
[i
],
12091 target
->jalr_to_bal(),
12094 &calculated_value
);
12097 case elfcpp::R_MIPS_TLS_DTPREL_HI16
:
12098 case elfcpp::R_MIPS16_TLS_DTPREL_HI16
:
12099 case elfcpp::R_MICROMIPS_TLS_DTPREL_HI16
:
12100 reloc_status
= Reloc_funcs::tlsrelhi16(view
, object
, psymval
,
12101 elfcpp::DTP_OFFSET
, r_addend
,
12102 extract_addend
, calculate_only
,
12103 &calculated_value
);
12105 case elfcpp::R_MIPS_TLS_DTPREL_LO16
:
12106 case elfcpp::R_MIPS16_TLS_DTPREL_LO16
:
12107 case elfcpp::R_MICROMIPS_TLS_DTPREL_LO16
:
12108 reloc_status
= Reloc_funcs::tlsrello16(view
, object
, psymval
,
12109 elfcpp::DTP_OFFSET
, r_addend
,
12110 extract_addend
, calculate_only
,
12111 &calculated_value
);
12113 case elfcpp::R_MIPS_TLS_DTPREL32
:
12114 case elfcpp::R_MIPS_TLS_DTPREL64
:
12115 reloc_status
= Reloc_funcs::tlsrel32(view
, object
, psymval
,
12116 elfcpp::DTP_OFFSET
, r_addend
,
12117 extract_addend
, calculate_only
,
12118 &calculated_value
);
12120 case elfcpp::R_MIPS_TLS_TPREL_HI16
:
12121 case elfcpp::R_MIPS16_TLS_TPREL_HI16
:
12122 case elfcpp::R_MICROMIPS_TLS_TPREL_HI16
:
12123 reloc_status
= Reloc_funcs::tlsrelhi16(view
, object
, psymval
,
12124 elfcpp::TP_OFFSET
, r_addend
,
12125 extract_addend
, calculate_only
,
12126 &calculated_value
);
12128 case elfcpp::R_MIPS_TLS_TPREL_LO16
:
12129 case elfcpp::R_MIPS16_TLS_TPREL_LO16
:
12130 case elfcpp::R_MICROMIPS_TLS_TPREL_LO16
:
12131 reloc_status
= Reloc_funcs::tlsrello16(view
, object
, psymval
,
12132 elfcpp::TP_OFFSET
, r_addend
,
12133 extract_addend
, calculate_only
,
12134 &calculated_value
);
12136 case elfcpp::R_MIPS_TLS_TPREL32
:
12137 case elfcpp::R_MIPS_TLS_TPREL64
:
12138 reloc_status
= Reloc_funcs::tlsrel32(view
, object
, psymval
,
12139 elfcpp::TP_OFFSET
, r_addend
,
12140 extract_addend
, calculate_only
,
12141 &calculated_value
);
12143 case elfcpp::R_MIPS_SUB
:
12144 case elfcpp::R_MICROMIPS_SUB
:
12145 reloc_status
= Reloc_funcs::relsub(view
, object
, psymval
, r_addend
,
12147 calculate_only
, &calculated_value
);
12149 case elfcpp::R_MIPS_HIGHER
:
12150 case elfcpp::R_MICROMIPS_HIGHER
:
12151 reloc_status
= Reloc_funcs::relhigher(view
, object
, psymval
, r_addend
,
12152 extract_addend
, calculate_only
,
12153 &calculated_value
);
12155 case elfcpp::R_MIPS_HIGHEST
:
12156 case elfcpp::R_MICROMIPS_HIGHEST
:
12157 reloc_status
= Reloc_funcs::relhighest(view
, object
, psymval
,
12158 r_addend
, extract_addend
,
12160 &calculated_value
);
12163 gold_error_at_location(relinfo
, relnum
, r_offset
,
12164 _("unsupported reloc %u"), r_types
[i
]);
12168 if (update_got_entry
)
12170 Mips_output_data_got
<size
, big_endian
>* got
= target
->got_section();
12171 if (mips_sym
!= NULL
&& mips_sym
->get_applied_secondary_got_fixup())
12172 got
->update_got_entry(got
->get_primary_got_offset(mips_sym
),
12173 psymval
->value(object
, 0));
12175 got
->update_got_entry(got_offset
, psymval
->value(object
, 0));
12178 r_addend
= calculated_value
;
12181 bool jal_shuffle
= jal_reloc(r_type
) ? !parameters
->options().relocatable()
12183 Reloc_funcs::mips_reloc_shuffle(view
, r_type
, jal_shuffle
);
12185 // Report any errors.
12186 switch (reloc_status
)
12188 case Reloc_funcs::STATUS_OKAY
:
12190 case Reloc_funcs::STATUS_OVERFLOW
:
12191 gold_error_at_location(relinfo
, relnum
, r_offset
,
12192 _("relocation overflow"));
12194 case Reloc_funcs::STATUS_BAD_RELOC
:
12195 gold_error_at_location(relinfo
, relnum
, r_offset
,
12196 _("unexpected opcode while processing relocation"));
12198 case Reloc_funcs::STATUS_PCREL_UNALIGNED
:
12199 gold_error_at_location(relinfo
, relnum
, r_offset
,
12200 _("unaligned PC-relative relocation"));
12203 gold_unreachable();
12209 // Get the Reference_flags for a particular relocation.
12211 template<int size
, bool big_endian
>
12213 Target_mips
<size
, big_endian
>::Scan::get_reference_flags(
12214 unsigned int r_type
)
12218 case elfcpp::R_MIPS_NONE
:
12219 // No symbol reference.
12222 case elfcpp::R_MIPS_16
:
12223 case elfcpp::R_MIPS_32
:
12224 case elfcpp::R_MIPS_64
:
12225 case elfcpp::R_MIPS_HI16
:
12226 case elfcpp::R_MIPS_LO16
:
12227 case elfcpp::R_MIPS_HIGHER
:
12228 case elfcpp::R_MIPS_HIGHEST
:
12229 case elfcpp::R_MIPS16_HI16
:
12230 case elfcpp::R_MIPS16_LO16
:
12231 case elfcpp::R_MICROMIPS_HI16
:
12232 case elfcpp::R_MICROMIPS_LO16
:
12233 case elfcpp::R_MICROMIPS_HIGHER
:
12234 case elfcpp::R_MICROMIPS_HIGHEST
:
12235 return Symbol::ABSOLUTE_REF
;
12237 case elfcpp::R_MIPS_26
:
12238 case elfcpp::R_MIPS16_26
:
12239 case elfcpp::R_MICROMIPS_26_S1
:
12240 return Symbol::FUNCTION_CALL
| Symbol::ABSOLUTE_REF
;
12242 case elfcpp::R_MIPS_PC18_S3
:
12243 case elfcpp::R_MIPS_PC19_S2
:
12244 case elfcpp::R_MIPS_PCHI16
:
12245 case elfcpp::R_MIPS_PCLO16
:
12246 case elfcpp::R_MIPS_GPREL32
:
12247 case elfcpp::R_MIPS_GPREL16
:
12248 case elfcpp::R_MIPS_REL32
:
12249 case elfcpp::R_MIPS16_GPREL
:
12250 return Symbol::RELATIVE_REF
;
12252 case elfcpp::R_MIPS_PC16
:
12253 case elfcpp::R_MIPS_PC32
:
12254 case elfcpp::R_MIPS_PC21_S2
:
12255 case elfcpp::R_MIPS_PC26_S2
:
12256 case elfcpp::R_MIPS_JALR
:
12257 case elfcpp::R_MICROMIPS_JALR
:
12258 return Symbol::FUNCTION_CALL
| Symbol::RELATIVE_REF
;
12260 case elfcpp::R_MIPS_GOT16
:
12261 case elfcpp::R_MIPS_CALL16
:
12262 case elfcpp::R_MIPS_GOT_DISP
:
12263 case elfcpp::R_MIPS_GOT_HI16
:
12264 case elfcpp::R_MIPS_GOT_LO16
:
12265 case elfcpp::R_MIPS_CALL_HI16
:
12266 case elfcpp::R_MIPS_CALL_LO16
:
12267 case elfcpp::R_MIPS_LITERAL
:
12268 case elfcpp::R_MIPS_GOT_PAGE
:
12269 case elfcpp::R_MIPS_GOT_OFST
:
12270 case elfcpp::R_MIPS16_GOT16
:
12271 case elfcpp::R_MIPS16_CALL16
:
12272 case elfcpp::R_MICROMIPS_GOT16
:
12273 case elfcpp::R_MICROMIPS_CALL16
:
12274 case elfcpp::R_MICROMIPS_GOT_HI16
:
12275 case elfcpp::R_MICROMIPS_GOT_LO16
:
12276 case elfcpp::R_MICROMIPS_CALL_HI16
:
12277 case elfcpp::R_MICROMIPS_CALL_LO16
:
12278 case elfcpp::R_MIPS_EH
:
12279 // Absolute in GOT.
12280 return Symbol::RELATIVE_REF
;
12282 case elfcpp::R_MIPS_TLS_DTPMOD32
:
12283 case elfcpp::R_MIPS_TLS_DTPREL32
:
12284 case elfcpp::R_MIPS_TLS_DTPMOD64
:
12285 case elfcpp::R_MIPS_TLS_DTPREL64
:
12286 case elfcpp::R_MIPS_TLS_GD
:
12287 case elfcpp::R_MIPS_TLS_LDM
:
12288 case elfcpp::R_MIPS_TLS_DTPREL_HI16
:
12289 case elfcpp::R_MIPS_TLS_DTPREL_LO16
:
12290 case elfcpp::R_MIPS_TLS_GOTTPREL
:
12291 case elfcpp::R_MIPS_TLS_TPREL32
:
12292 case elfcpp::R_MIPS_TLS_TPREL64
:
12293 case elfcpp::R_MIPS_TLS_TPREL_HI16
:
12294 case elfcpp::R_MIPS_TLS_TPREL_LO16
:
12295 case elfcpp::R_MIPS16_TLS_GD
:
12296 case elfcpp::R_MIPS16_TLS_GOTTPREL
:
12297 case elfcpp::R_MICROMIPS_TLS_GD
:
12298 case elfcpp::R_MICROMIPS_TLS_GOTTPREL
:
12299 case elfcpp::R_MICROMIPS_TLS_TPREL_HI16
:
12300 case elfcpp::R_MICROMIPS_TLS_TPREL_LO16
:
12301 return Symbol::TLS_REF
;
12303 case elfcpp::R_MIPS_COPY
:
12304 case elfcpp::R_MIPS_JUMP_SLOT
:
12306 // Not expected. We will give an error later.
12311 // Report an unsupported relocation against a local symbol.
12313 template<int size
, bool big_endian
>
12315 Target_mips
<size
, big_endian
>::Scan::unsupported_reloc_local(
12316 Sized_relobj_file
<size
, big_endian
>* object
,
12317 unsigned int r_type
)
12319 gold_error(_("%s: unsupported reloc %u against local symbol"),
12320 object
->name().c_str(), r_type
);
12323 // Report an unsupported relocation against a global symbol.
12325 template<int size
, bool big_endian
>
12327 Target_mips
<size
, big_endian
>::Scan::unsupported_reloc_global(
12328 Sized_relobj_file
<size
, big_endian
>* object
,
12329 unsigned int r_type
,
12332 gold_error(_("%s: unsupported reloc %u against global symbol %s"),
12333 object
->name().c_str(), r_type
, gsym
->demangled_name().c_str());
12336 // Return printable name for ABI.
12337 template<int size
, bool big_endian
>
12339 Target_mips
<size
, big_endian
>::elf_mips_abi_name(elfcpp::Elf_Word e_flags
)
12341 switch (e_flags
& elfcpp::EF_MIPS_ABI
)
12344 if ((e_flags
& elfcpp::EF_MIPS_ABI2
) != 0)
12346 else if (size
== 64)
12350 case elfcpp::E_MIPS_ABI_O32
:
12352 case elfcpp::E_MIPS_ABI_O64
:
12354 case elfcpp::E_MIPS_ABI_EABI32
:
12356 case elfcpp::E_MIPS_ABI_EABI64
:
12359 return "unknown abi";
12363 template<int size
, bool big_endian
>
12365 Target_mips
<size
, big_endian
>::elf_mips_mach_name(elfcpp::Elf_Word e_flags
)
12367 switch (e_flags
& elfcpp::EF_MIPS_MACH
)
12369 case elfcpp::E_MIPS_MACH_3900
:
12370 return "mips:3900";
12371 case elfcpp::E_MIPS_MACH_4010
:
12372 return "mips:4010";
12373 case elfcpp::E_MIPS_MACH_4100
:
12374 return "mips:4100";
12375 case elfcpp::E_MIPS_MACH_4111
:
12376 return "mips:4111";
12377 case elfcpp::E_MIPS_MACH_4120
:
12378 return "mips:4120";
12379 case elfcpp::E_MIPS_MACH_4650
:
12380 return "mips:4650";
12381 case elfcpp::E_MIPS_MACH_5400
:
12382 return "mips:5400";
12383 case elfcpp::E_MIPS_MACH_5500
:
12384 return "mips:5500";
12385 case elfcpp::E_MIPS_MACH_5900
:
12386 return "mips:5900";
12387 case elfcpp::E_MIPS_MACH_SB1
:
12389 case elfcpp::E_MIPS_MACH_9000
:
12390 return "mips:9000";
12391 case elfcpp::E_MIPS_MACH_LS2E
:
12392 return "mips:loongson_2e";
12393 case elfcpp::E_MIPS_MACH_LS2F
:
12394 return "mips:loongson_2f";
12395 case elfcpp::E_MIPS_MACH_LS3A
:
12396 return "mips:loongson_3a";
12397 case elfcpp::E_MIPS_MACH_OCTEON
:
12398 return "mips:octeon";
12399 case elfcpp::E_MIPS_MACH_OCTEON2
:
12400 return "mips:octeon2";
12401 case elfcpp::E_MIPS_MACH_OCTEON3
:
12402 return "mips:octeon3";
12403 case elfcpp::E_MIPS_MACH_XLR
:
12406 switch (e_flags
& elfcpp::EF_MIPS_ARCH
)
12409 case elfcpp::E_MIPS_ARCH_1
:
12410 return "mips:3000";
12412 case elfcpp::E_MIPS_ARCH_2
:
12413 return "mips:6000";
12415 case elfcpp::E_MIPS_ARCH_3
:
12416 return "mips:4000";
12418 case elfcpp::E_MIPS_ARCH_4
:
12419 return "mips:8000";
12421 case elfcpp::E_MIPS_ARCH_5
:
12422 return "mips:mips5";
12424 case elfcpp::E_MIPS_ARCH_32
:
12425 return "mips:isa32";
12427 case elfcpp::E_MIPS_ARCH_64
:
12428 return "mips:isa64";
12430 case elfcpp::E_MIPS_ARCH_32R2
:
12431 return "mips:isa32r2";
12433 case elfcpp::E_MIPS_ARCH_32R6
:
12434 return "mips:isa32r6";
12436 case elfcpp::E_MIPS_ARCH_64R2
:
12437 return "mips:isa64r2";
12439 case elfcpp::E_MIPS_ARCH_64R6
:
12440 return "mips:isa64r6";
12443 return "unknown CPU";
12446 template<int size
, bool big_endian
>
12447 const Target::Target_info Target_mips
<size
, big_endian
>::mips_info
=
12450 big_endian
, // is_big_endian
12451 elfcpp::EM_MIPS
, // machine_code
12452 true, // has_make_symbol
12453 false, // has_resolve
12454 false, // has_code_fill
12455 true, // is_default_stack_executable
12456 false, // can_icf_inline_merge_sections
12458 size
== 32 ? "/lib/ld.so.1" : "/lib64/ld.so.1", // dynamic_linker
12459 0x400000, // default_text_segment_address
12460 64 * 1024, // abi_pagesize (overridable by -z max-page-size)
12461 4 * 1024, // common_pagesize (overridable by -z common-page-size)
12462 false, // isolate_execinstr
12463 0, // rosegment_gap
12464 elfcpp::SHN_UNDEF
, // small_common_shndx
12465 elfcpp::SHN_UNDEF
, // large_common_shndx
12466 0, // small_common_section_flags
12467 0, // large_common_section_flags
12468 NULL
, // attributes_section
12469 NULL
, // attributes_vendor
12470 "__start", // entry_symbol_name
12471 32, // hash_entry_size
12474 template<int size
, bool big_endian
>
12475 class Target_mips_nacl
: public Target_mips
<size
, big_endian
>
12479 : Target_mips
<size
, big_endian
>(&mips_nacl_info
)
12483 static const Target::Target_info mips_nacl_info
;
12486 template<int size
, bool big_endian
>
12487 const Target::Target_info Target_mips_nacl
<size
, big_endian
>::mips_nacl_info
=
12490 big_endian
, // is_big_endian
12491 elfcpp::EM_MIPS
, // machine_code
12492 true, // has_make_symbol
12493 false, // has_resolve
12494 false, // has_code_fill
12495 true, // is_default_stack_executable
12496 false, // can_icf_inline_merge_sections
12498 "/lib/ld.so.1", // dynamic_linker
12499 0x20000, // default_text_segment_address
12500 0x10000, // abi_pagesize (overridable by -z max-page-size)
12501 0x10000, // common_pagesize (overridable by -z common-page-size)
12502 true, // isolate_execinstr
12503 0x10000000, // rosegment_gap
12504 elfcpp::SHN_UNDEF
, // small_common_shndx
12505 elfcpp::SHN_UNDEF
, // large_common_shndx
12506 0, // small_common_section_flags
12507 0, // large_common_section_flags
12508 NULL
, // attributes_section
12509 NULL
, // attributes_vendor
12510 "_start", // entry_symbol_name
12511 32, // hash_entry_size
12514 // Target selector for Mips. Note this is never instantiated directly.
12515 // It's only used in Target_selector_mips_nacl, below.
12517 template<int size
, bool big_endian
>
12518 class Target_selector_mips
: public Target_selector
12521 Target_selector_mips()
12522 : Target_selector(elfcpp::EM_MIPS
, size
, big_endian
,
12524 (big_endian
? "elf64-tradbigmips" : "elf64-tradlittlemips") :
12525 (big_endian
? "elf32-tradbigmips" : "elf32-tradlittlemips")),
12527 (big_endian
? "elf64btsmip" : "elf64ltsmip") :
12528 (big_endian
? "elf32btsmip" : "elf32ltsmip")))
12531 Target
* do_instantiate_target()
12532 { return new Target_mips
<size
, big_endian
>(); }
12535 template<int size
, bool big_endian
>
12536 class Target_selector_mips_nacl
12537 : public Target_selector_nacl
<Target_selector_mips
<size
, big_endian
>,
12538 Target_mips_nacl
<size
, big_endian
> >
12541 Target_selector_mips_nacl()
12542 : Target_selector_nacl
<Target_selector_mips
<size
, big_endian
>,
12543 Target_mips_nacl
<size
, big_endian
> >(
12544 // NaCl currently supports only MIPS32 little-endian.
12545 "mipsel", "elf32-tradlittlemips-nacl", "elf32-tradlittlemips-nacl")
12549 Target_selector_mips_nacl
<32, true> target_selector_mips32
;
12550 Target_selector_mips_nacl
<32, false> target_selector_mips32el
;
12551 Target_selector_mips_nacl
<64, true> target_selector_mips64
;
12552 Target_selector_mips_nacl
<64, false> target_selector_mips64el
;
12554 } // End anonymous namespace.