1 // mips.cc -- mips target support for gold.
3 // Copyright (C) 2011-2016 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"
53 template<int size
, bool big_endian
>
54 class Mips_output_data_plt
;
56 template<int size
, bool big_endian
>
57 class Mips_output_data_got
;
59 template<int size
, bool big_endian
>
62 template<int size
, bool big_endian
>
63 class Mips_output_section_reginfo
;
65 template<int size
, bool big_endian
>
66 class Mips_output_data_la25_stub
;
68 template<int size
, bool big_endian
>
69 class Mips_output_data_mips_stubs
;
74 template<int size
, bool big_endian
>
77 template<int size
, bool big_endian
>
80 class Mips16_stub_section_base
;
82 template<int size
, bool big_endian
>
83 class Mips16_stub_section
;
85 // The ABI says that every symbol used by dynamic relocations must have
86 // a global GOT entry. Among other things, this provides the dynamic
87 // linker with a free, directly-indexed cache. The GOT can therefore
88 // contain symbols that are not referenced by GOT relocations themselves
89 // (in other words, it may have symbols that are not referenced by things
90 // like R_MIPS_GOT16 and R_MIPS_GOT_PAGE).
92 // GOT relocations are less likely to overflow if we put the associated
93 // GOT entries towards the beginning. We therefore divide the global
94 // GOT entries into two areas: "normal" and "reloc-only". Entries in
95 // the first area can be used for both dynamic relocations and GP-relative
96 // accesses, while those in the "reloc-only" area are for dynamic
99 // These GGA_* ("Global GOT Area") values are organised so that lower
100 // values are more general than higher values. Also, non-GGA_NONE
101 // values are ordered by the position of the area in the GOT.
110 // The types of GOT entries needed for this platform.
111 // These values are exposed to the ABI in an incremental link.
112 // Do not renumber existing values without changing the version
113 // number of the .gnu_incremental_inputs section.
116 GOT_TYPE_STANDARD
= 0, // GOT entry for a regular symbol
117 GOT_TYPE_TLS_OFFSET
= 1, // GOT entry for TLS offset
118 GOT_TYPE_TLS_PAIR
= 2, // GOT entry for TLS module/offset pair
120 // GOT entries for multi-GOT. We support up to 1024 GOTs in multi-GOT links.
121 GOT_TYPE_STANDARD_MULTIGOT
= 3,
122 GOT_TYPE_TLS_OFFSET_MULTIGOT
= GOT_TYPE_STANDARD_MULTIGOT
+ 1024,
123 GOT_TYPE_TLS_PAIR_MULTIGOT
= GOT_TYPE_TLS_OFFSET_MULTIGOT
+ 1024
126 // TLS type of GOT entry.
135 // Return TRUE if a relocation of type R_TYPE from OBJECT might
136 // require an la25 stub. See also local_pic_function, which determines
137 // whether the destination function ever requires a stub.
138 template<int size
, bool big_endian
>
140 relocation_needs_la25_stub(Mips_relobj
<size
, big_endian
>* object
,
141 unsigned int r_type
, bool target_is_16_bit_code
)
143 // We specifically ignore branches and jumps from EF_PIC objects,
144 // where the onus is on the compiler or programmer to perform any
145 // necessary initialization of $25. Sometimes such initialization
146 // is unnecessary; for example, -mno-shared functions do not use
147 // the incoming value of $25, and may therefore be called directly.
148 if (object
->is_pic())
153 case elfcpp::R_MIPS_26
:
154 case elfcpp::R_MIPS_PC16
:
155 case elfcpp::R_MICROMIPS_26_S1
:
156 case elfcpp::R_MICROMIPS_PC7_S1
:
157 case elfcpp::R_MICROMIPS_PC10_S1
:
158 case elfcpp::R_MICROMIPS_PC16_S1
:
159 case elfcpp::R_MICROMIPS_PC23_S2
:
162 case elfcpp::R_MIPS16_26
:
163 return !target_is_16_bit_code
;
170 // Return true if SYM is a locally-defined PIC function, in the sense
171 // that it or its fn_stub might need $25 to be valid on entry.
172 // Note that MIPS16 functions set up $gp using PC-relative instructions,
173 // so they themselves never need $25 to be valid. Only non-MIPS16
174 // entry points are of interest here.
175 template<int size
, bool big_endian
>
177 local_pic_function(Mips_symbol
<size
>* sym
)
179 bool def_regular
= (sym
->source() == Symbol::FROM_OBJECT
180 && !sym
->object()->is_dynamic()
181 && !sym
->is_undefined());
183 if (sym
->is_defined() && def_regular
)
185 Mips_relobj
<size
, big_endian
>* object
=
186 static_cast<Mips_relobj
<size
, big_endian
>*>(sym
->object());
188 if ((object
->is_pic() || sym
->is_pic())
189 && (!sym
->is_mips16()
190 || (sym
->has_mips16_fn_stub() && sym
->need_fn_stub())))
197 hi16_reloc(int r_type
)
199 return (r_type
== elfcpp::R_MIPS_HI16
200 || r_type
== elfcpp::R_MIPS16_HI16
201 || r_type
== elfcpp::R_MICROMIPS_HI16
);
205 lo16_reloc(int r_type
)
207 return (r_type
== elfcpp::R_MIPS_LO16
208 || r_type
== elfcpp::R_MIPS16_LO16
209 || r_type
== elfcpp::R_MICROMIPS_LO16
);
213 got16_reloc(unsigned int r_type
)
215 return (r_type
== elfcpp::R_MIPS_GOT16
216 || r_type
== elfcpp::R_MIPS16_GOT16
217 || r_type
== elfcpp::R_MICROMIPS_GOT16
);
221 call_lo16_reloc(unsigned int r_type
)
223 return (r_type
== elfcpp::R_MIPS_CALL_LO16
224 || r_type
== elfcpp::R_MICROMIPS_CALL_LO16
);
228 got_lo16_reloc(unsigned int r_type
)
230 return (r_type
== elfcpp::R_MIPS_GOT_LO16
231 || r_type
== elfcpp::R_MICROMIPS_GOT_LO16
);
235 got_disp_reloc(unsigned int r_type
)
237 return (r_type
== elfcpp::R_MIPS_GOT_DISP
238 || r_type
== elfcpp::R_MICROMIPS_GOT_DISP
);
242 got_page_reloc(unsigned int r_type
)
244 return (r_type
== elfcpp::R_MIPS_GOT_PAGE
245 || r_type
== elfcpp::R_MICROMIPS_GOT_PAGE
);
249 tls_gd_reloc(unsigned int r_type
)
251 return (r_type
== elfcpp::R_MIPS_TLS_GD
252 || r_type
== elfcpp::R_MIPS16_TLS_GD
253 || r_type
== elfcpp::R_MICROMIPS_TLS_GD
);
257 tls_gottprel_reloc(unsigned int r_type
)
259 return (r_type
== elfcpp::R_MIPS_TLS_GOTTPREL
260 || r_type
== elfcpp::R_MIPS16_TLS_GOTTPREL
261 || r_type
== elfcpp::R_MICROMIPS_TLS_GOTTPREL
);
265 tls_ldm_reloc(unsigned int r_type
)
267 return (r_type
== elfcpp::R_MIPS_TLS_LDM
268 || r_type
== elfcpp::R_MIPS16_TLS_LDM
269 || r_type
== elfcpp::R_MICROMIPS_TLS_LDM
);
273 mips16_call_reloc(unsigned int r_type
)
275 return (r_type
== elfcpp::R_MIPS16_26
276 || r_type
== elfcpp::R_MIPS16_CALL16
);
280 jal_reloc(unsigned int r_type
)
282 return (r_type
== elfcpp::R_MIPS_26
283 || r_type
== elfcpp::R_MIPS16_26
284 || r_type
== elfcpp::R_MICROMIPS_26_S1
);
288 micromips_branch_reloc(unsigned int r_type
)
290 return (r_type
== elfcpp::R_MICROMIPS_26_S1
291 || r_type
== elfcpp::R_MICROMIPS_PC16_S1
292 || r_type
== elfcpp::R_MICROMIPS_PC10_S1
293 || r_type
== elfcpp::R_MICROMIPS_PC7_S1
);
296 // Check if R_TYPE is a MIPS16 reloc.
298 mips16_reloc(unsigned int r_type
)
302 case elfcpp::R_MIPS16_26
:
303 case elfcpp::R_MIPS16_GPREL
:
304 case elfcpp::R_MIPS16_GOT16
:
305 case elfcpp::R_MIPS16_CALL16
:
306 case elfcpp::R_MIPS16_HI16
:
307 case elfcpp::R_MIPS16_LO16
:
308 case elfcpp::R_MIPS16_TLS_GD
:
309 case elfcpp::R_MIPS16_TLS_LDM
:
310 case elfcpp::R_MIPS16_TLS_DTPREL_HI16
:
311 case elfcpp::R_MIPS16_TLS_DTPREL_LO16
:
312 case elfcpp::R_MIPS16_TLS_GOTTPREL
:
313 case elfcpp::R_MIPS16_TLS_TPREL_HI16
:
314 case elfcpp::R_MIPS16_TLS_TPREL_LO16
:
322 // Check if R_TYPE is a microMIPS reloc.
324 micromips_reloc(unsigned int r_type
)
328 case elfcpp::R_MICROMIPS_26_S1
:
329 case elfcpp::R_MICROMIPS_HI16
:
330 case elfcpp::R_MICROMIPS_LO16
:
331 case elfcpp::R_MICROMIPS_GPREL16
:
332 case elfcpp::R_MICROMIPS_LITERAL
:
333 case elfcpp::R_MICROMIPS_GOT16
:
334 case elfcpp::R_MICROMIPS_PC7_S1
:
335 case elfcpp::R_MICROMIPS_PC10_S1
:
336 case elfcpp::R_MICROMIPS_PC16_S1
:
337 case elfcpp::R_MICROMIPS_CALL16
:
338 case elfcpp::R_MICROMIPS_GOT_DISP
:
339 case elfcpp::R_MICROMIPS_GOT_PAGE
:
340 case elfcpp::R_MICROMIPS_GOT_OFST
:
341 case elfcpp::R_MICROMIPS_GOT_HI16
:
342 case elfcpp::R_MICROMIPS_GOT_LO16
:
343 case elfcpp::R_MICROMIPS_SUB
:
344 case elfcpp::R_MICROMIPS_HIGHER
:
345 case elfcpp::R_MICROMIPS_HIGHEST
:
346 case elfcpp::R_MICROMIPS_CALL_HI16
:
347 case elfcpp::R_MICROMIPS_CALL_LO16
:
348 case elfcpp::R_MICROMIPS_SCN_DISP
:
349 case elfcpp::R_MICROMIPS_JALR
:
350 case elfcpp::R_MICROMIPS_HI0_LO16
:
351 case elfcpp::R_MICROMIPS_TLS_GD
:
352 case elfcpp::R_MICROMIPS_TLS_LDM
:
353 case elfcpp::R_MICROMIPS_TLS_DTPREL_HI16
:
354 case elfcpp::R_MICROMIPS_TLS_DTPREL_LO16
:
355 case elfcpp::R_MICROMIPS_TLS_GOTTPREL
:
356 case elfcpp::R_MICROMIPS_TLS_TPREL_HI16
:
357 case elfcpp::R_MICROMIPS_TLS_TPREL_LO16
:
358 case elfcpp::R_MICROMIPS_GPREL7_S2
:
359 case elfcpp::R_MICROMIPS_PC23_S2
:
368 is_matching_lo16_reloc(unsigned int high_reloc
, unsigned int lo16_reloc
)
372 case elfcpp::R_MIPS_HI16
:
373 case elfcpp::R_MIPS_GOT16
:
374 return lo16_reloc
== elfcpp::R_MIPS_LO16
;
375 case elfcpp::R_MIPS16_HI16
:
376 case elfcpp::R_MIPS16_GOT16
:
377 return lo16_reloc
== elfcpp::R_MIPS16_LO16
;
378 case elfcpp::R_MICROMIPS_HI16
:
379 case elfcpp::R_MICROMIPS_GOT16
:
380 return lo16_reloc
== elfcpp::R_MICROMIPS_LO16
;
386 // This class is used to hold information about one GOT entry.
387 // There are three types of entry:
389 // (1) a SYMBOL + OFFSET address, where SYMBOL is local to an input object
390 // (object != NULL, symndx >= 0, tls_type != GOT_TLS_LDM)
391 // (2) a SYMBOL address, where SYMBOL is not local to an input object
392 // (object != NULL, symndx == -1)
393 // (3) a TLS LDM slot
394 // (object != NULL, symndx == 0, tls_type == GOT_TLS_LDM)
396 template<int size
, bool big_endian
>
399 typedef typename
elfcpp::Elf_types
<size
>::Elf_Addr Mips_address
;
402 Mips_got_entry(Mips_relobj
<size
, big_endian
>* object
, unsigned int symndx
,
403 Mips_address addend
, unsigned char tls_type
,
405 : object_(object
), symndx_(symndx
), tls_type_(tls_type
), shndx_(shndx
)
406 { this->d
.addend
= addend
; }
408 Mips_got_entry(Mips_relobj
<size
, big_endian
>* object
, Mips_symbol
<size
>* sym
,
409 unsigned char tls_type
)
410 : object_(object
), symndx_(-1U), tls_type_(tls_type
), shndx_(-1U)
411 { this->d
.sym
= sym
; }
413 // Return whether this entry is for a local symbol.
415 is_for_local_symbol() const
416 { return this->symndx_
!= -1U; }
418 // Return whether this entry is for a global symbol.
420 is_for_global_symbol() const
421 { return this->symndx_
== -1U; }
423 // Return the hash of this entry.
427 if (this->tls_type_
== GOT_TLS_LDM
)
428 return this->symndx_
+ (1 << 18);
429 if (this->symndx_
!= -1U)
431 uintptr_t object_id
= reinterpret_cast<uintptr_t>(this->object());
432 return this->symndx_
+ object_id
+ this->d
.addend
;
436 uintptr_t sym_id
= reinterpret_cast<uintptr_t>(this->d
.sym
);
437 return this->symndx_
+ sym_id
;
441 // Return whether this entry is equal to OTHER.
443 equals(Mips_got_entry
<size
, big_endian
>* other
) const
445 if (this->symndx_
!= other
->symndx_
446 || this->tls_type_
!= other
->tls_type_
)
448 if (this->tls_type_
== GOT_TLS_LDM
)
450 if (this->symndx_
!= -1U)
451 return (this->object() == other
->object()
452 && this->d
.addend
== other
->d
.addend
);
454 return this->d
.sym
== other
->d
.sym
;
457 // Return input object that needs this GOT entry.
458 Mips_relobj
<size
, big_endian
>*
461 gold_assert(this->object_
!= NULL
);
462 return this->object_
;
465 // Return local symbol index for local GOT entries.
469 gold_assert(this->symndx_
!= -1U);
470 return this->symndx_
;
473 // Return the relocation addend for local GOT entries.
477 gold_assert(this->symndx_
!= -1U);
478 return this->d
.addend
;
481 // Return global symbol for global GOT entries.
485 gold_assert(this->symndx_
== -1U);
489 // Return whether this is a TLS GOT entry.
492 { return this->tls_type_
!= GOT_TLS_NONE
; }
494 // Return TLS type of this GOT entry.
497 { return this->tls_type_
; }
499 // Return section index of the local symbol for local GOT entries.
502 { return this->shndx_
; }
505 // The input object that needs the GOT entry.
506 Mips_relobj
<size
, big_endian
>* object_
;
507 // The index of the symbol if we have a local symbol; -1 otherwise.
508 unsigned int symndx_
;
512 // If symndx != -1, the addend of the relocation that should be added to the
515 // If symndx == -1, the global symbol corresponding to this GOT entry. The
516 // symbol's entry is in the local area if mips_sym->global_got_area is
517 // GGA_NONE, otherwise it is in the global area.
518 Mips_symbol
<size
>* sym
;
521 // The TLS type of this GOT entry. An LDM GOT entry will be a local
522 // symbol entry with r_symndx == 0.
523 unsigned char tls_type_
;
525 // For local GOT entries, section index of the local symbol.
529 // Hash for Mips_got_entry.
531 template<int size
, bool big_endian
>
532 class Mips_got_entry_hash
536 operator()(Mips_got_entry
<size
, big_endian
>* entry
) const
537 { return entry
->hash(); }
540 // Equality for Mips_got_entry.
542 template<int size
, bool big_endian
>
543 class Mips_got_entry_eq
547 operator()(Mips_got_entry
<size
, big_endian
>* e1
,
548 Mips_got_entry
<size
, big_endian
>* e2
) const
549 { return e1
->equals(e2
); }
552 // Got_page_range. This class describes a range of addends: [MIN_ADDEND,
553 // MAX_ADDEND]. The instances form a non-overlapping list that is sorted by
554 // increasing MIN_ADDEND.
556 struct Got_page_range
559 : next(NULL
), min_addend(0), max_addend(0)
562 Got_page_range
* next
;
566 // Return the maximum number of GOT page entries required.
569 { return (this->max_addend
- this->min_addend
+ 0x1ffff) >> 16; }
572 // Got_page_entry. This class describes the range of addends that are applied
573 // to page relocations against a given symbol.
575 struct Got_page_entry
578 : object(NULL
), symndx(-1U), ranges(NULL
), num_pages(0)
581 Got_page_entry(Object
* object_
, unsigned int symndx_
)
582 : object(object_
), symndx(symndx_
), ranges(NULL
), num_pages(0)
585 // The input object that needs the GOT page entry.
587 // The index of the symbol, as stored in the relocation r_info.
589 // The ranges for this page entry.
590 Got_page_range
* ranges
;
591 // The maximum number of page entries needed for RANGES.
592 unsigned int num_pages
;
595 // Hash for Got_page_entry.
597 struct Got_page_entry_hash
600 operator()(Got_page_entry
* entry
) const
601 { return reinterpret_cast<uintptr_t>(entry
->object
) + entry
->symndx
; }
604 // Equality for Got_page_entry.
606 struct Got_page_entry_eq
609 operator()(Got_page_entry
* entry1
, Got_page_entry
* entry2
) const
611 return entry1
->object
== entry2
->object
&& entry1
->symndx
== entry2
->symndx
;
615 // This class is used to hold .got information when linking.
617 template<int size
, bool big_endian
>
620 typedef typename
elfcpp::Elf_types
<size
>::Elf_Addr Mips_address
;
621 typedef Output_data_reloc
<elfcpp::SHT_REL
, true, size
, big_endian
>
623 typedef Unordered_map
<unsigned int, unsigned int> Got_page_offsets
;
625 // Unordered set of GOT entries.
626 typedef Unordered_set
<Mips_got_entry
<size
, big_endian
>*,
627 Mips_got_entry_hash
<size
, big_endian
>,
628 Mips_got_entry_eq
<size
, big_endian
> > Got_entry_set
;
630 // Unordered set of GOT page entries.
631 typedef Unordered_set
<Got_page_entry
*,
632 Got_page_entry_hash
, Got_page_entry_eq
> Got_page_entry_set
;
636 : local_gotno_(0), page_gotno_(0), global_gotno_(0), reloc_only_gotno_(0),
637 tls_gotno_(0), tls_ldm_offset_(-1U), global_got_symbols_(),
638 got_entries_(), got_page_entries_(), got_page_offset_start_(0),
639 got_page_offset_next_(0), got_page_offsets_(), next_(NULL
), index_(-1U),
643 // Reserve GOT entry for a GOT relocation of type R_TYPE against symbol
644 // SYMNDX + ADDEND, where SYMNDX is a local symbol in section SHNDX in OBJECT.
646 record_local_got_symbol(Mips_relobj
<size
, big_endian
>* object
,
647 unsigned int symndx
, Mips_address addend
,
648 unsigned int r_type
, unsigned int shndx
);
650 // Reserve GOT entry for a GOT relocation of type R_TYPE against MIPS_SYM,
651 // in OBJECT. FOR_CALL is true if the caller is only interested in
652 // using the GOT entry for calls. DYN_RELOC is true if R_TYPE is a dynamic
655 record_global_got_symbol(Mips_symbol
<size
>* mips_sym
,
656 Mips_relobj
<size
, big_endian
>* object
,
657 unsigned int r_type
, bool dyn_reloc
, bool for_call
);
659 // Add ENTRY to master GOT and to OBJECT's GOT.
661 record_got_entry(Mips_got_entry
<size
, big_endian
>* entry
,
662 Mips_relobj
<size
, big_endian
>* object
);
664 // Record that OBJECT has a page relocation against symbol SYMNDX and
665 // that ADDEND is the addend for that relocation.
667 record_got_page_entry(Mips_relobj
<size
, big_endian
>* object
,
668 unsigned int symndx
, int addend
);
670 // Create all entries that should be in the local part of the GOT.
672 add_local_entries(Target_mips
<size
, big_endian
>* target
, Layout
* layout
);
674 // Create GOT page entries.
676 add_page_entries(Target_mips
<size
, big_endian
>* target
, Layout
* layout
);
678 // Create global GOT entries, both GGA_NORMAL and GGA_RELOC_ONLY.
680 add_global_entries(Target_mips
<size
, big_endian
>* target
, Layout
* layout
,
681 unsigned int non_reloc_only_global_gotno
);
683 // Create global GOT entries that should be in the GGA_RELOC_ONLY area.
685 add_reloc_only_entries(Mips_output_data_got
<size
, big_endian
>* got
);
687 // Create TLS GOT entries.
689 add_tls_entries(Target_mips
<size
, big_endian
>* target
, Layout
* layout
);
691 // Decide whether the symbol needs an entry in the global part of the primary
692 // GOT, setting global_got_area accordingly. Count the number of global
693 // symbols that are in the primary GOT only because they have dynamic
694 // relocations R_MIPS_REL32 against them (reloc_only_gotno).
696 count_got_symbols(Symbol_table
* symtab
);
698 // Return the offset of GOT page entry for VALUE.
700 get_got_page_offset(Mips_address value
,
701 Mips_output_data_got
<size
, big_endian
>* got
);
703 // Count the number of GOT entries required.
707 // Count the number of GOT entries required by ENTRY. Accumulate the result.
709 count_got_entry(Mips_got_entry
<size
, big_endian
>* entry
);
711 // Add FROM's GOT entries.
713 add_got_entries(Mips_got_info
<size
, big_endian
>* from
);
715 // Add FROM's GOT page entries.
717 add_got_page_entries(Mips_got_info
<size
, big_endian
>* from
);
722 { return ((2 + this->local_gotno_
+ this->page_gotno_
+ this->global_gotno_
723 + this->tls_gotno_
) * size
/8);
726 // Return the number of local GOT entries.
729 { return this->local_gotno_
; }
731 // Return the maximum number of page GOT entries needed.
734 { return this->page_gotno_
; }
736 // Return the number of global GOT entries.
739 { return this->global_gotno_
; }
741 // Set the number of global GOT entries.
743 set_global_gotno(unsigned int global_gotno
)
744 { this->global_gotno_
= global_gotno
; }
746 // Return the number of GGA_RELOC_ONLY global GOT entries.
748 reloc_only_gotno() const
749 { return this->reloc_only_gotno_
; }
751 // Return the number of TLS GOT entries.
754 { return this->tls_gotno_
; }
756 // Return the GOT type for this GOT. Used for multi-GOT links only.
758 multigot_got_type(unsigned int got_type
) const
762 case GOT_TYPE_STANDARD
:
763 return GOT_TYPE_STANDARD_MULTIGOT
+ this->index_
;
764 case GOT_TYPE_TLS_OFFSET
:
765 return GOT_TYPE_TLS_OFFSET_MULTIGOT
+ this->index_
;
766 case GOT_TYPE_TLS_PAIR
:
767 return GOT_TYPE_TLS_PAIR_MULTIGOT
+ this->index_
;
773 // Remove lazy-binding stubs for global symbols in this GOT.
775 remove_lazy_stubs(Target_mips
<size
, big_endian
>* target
);
777 // Return offset of this GOT from the start of .got section.
780 { return this->offset_
; }
782 // Set offset of this GOT from the start of .got section.
784 set_offset(unsigned int offset
)
785 { this->offset_
= offset
; }
787 // Set index of this GOT in multi-GOT links.
789 set_index(unsigned int index
)
790 { this->index_
= index
; }
792 // Return next GOT in multi-GOT links.
793 Mips_got_info
<size
, big_endian
>*
795 { return this->next_
; }
797 // Set next GOT in multi-GOT links.
799 set_next(Mips_got_info
<size
, big_endian
>* next
)
800 { this->next_
= next
; }
802 // Return the offset of TLS LDM entry for this GOT.
804 tls_ldm_offset() const
805 { return this->tls_ldm_offset_
; }
807 // Set the offset of TLS LDM entry for this GOT.
809 set_tls_ldm_offset(unsigned int tls_ldm_offset
)
810 { this->tls_ldm_offset_
= tls_ldm_offset
; }
812 Unordered_set
<Mips_symbol
<size
>*>&
814 { return this->global_got_symbols_
; }
816 // Return the GOT_TLS_* type required by relocation type R_TYPE.
818 mips_elf_reloc_tls_type(unsigned int r_type
)
820 if (tls_gd_reloc(r_type
))
823 if (tls_ldm_reloc(r_type
))
826 if (tls_gottprel_reloc(r_type
))
832 // Return the number of GOT slots needed for GOT TLS type TYPE.
834 mips_tls_got_entries(unsigned int type
)
854 // The number of local GOT entries.
855 unsigned int local_gotno_
;
856 // The maximum number of page GOT entries needed.
857 unsigned int page_gotno_
;
858 // The number of global GOT entries.
859 unsigned int global_gotno_
;
860 // The number of global GOT entries that are in the GGA_RELOC_ONLY area.
861 unsigned int reloc_only_gotno_
;
862 // The number of TLS GOT entries.
863 unsigned int tls_gotno_
;
864 // The offset of TLS LDM entry for this GOT.
865 unsigned int tls_ldm_offset_
;
866 // All symbols that have global GOT entry.
867 Unordered_set
<Mips_symbol
<size
>*> global_got_symbols_
;
868 // A hash table holding GOT entries.
869 Got_entry_set got_entries_
;
870 // A hash table of GOT page entries.
871 Got_page_entry_set got_page_entries_
;
872 // The offset of first GOT page entry for this GOT.
873 unsigned int got_page_offset_start_
;
874 // The offset of next available GOT page entry for this GOT.
875 unsigned int got_page_offset_next_
;
876 // A hash table that maps GOT page entry value to the GOT offset where
877 // the entry is located.
878 Got_page_offsets got_page_offsets_
;
879 // In multi-GOT links, a pointer to the next GOT.
880 Mips_got_info
<size
, big_endian
>* next_
;
881 // Index of this GOT in multi-GOT links.
883 // The offset of this GOT in multi-GOT links.
884 unsigned int offset_
;
887 // This is a helper class used during relocation scan. It records GOT16 addend.
889 template<int size
, bool big_endian
>
892 typedef typename
elfcpp::Elf_types
<size
>::Elf_Addr Mips_address
;
894 got16_addend(const Sized_relobj_file
<size
, big_endian
>* _object
,
895 unsigned int _shndx
, unsigned int _r_type
, unsigned int _r_sym
,
896 Mips_address _addend
)
897 : object(_object
), shndx(_shndx
), r_type(_r_type
), r_sym(_r_sym
),
901 const Sized_relobj_file
<size
, big_endian
>* object
;
908 // Mips_symbol class. Holds additional symbol information needed for Mips.
911 class Mips_symbol
: public Sized_symbol
<size
>
915 : need_fn_stub_(false), has_nonpic_branches_(false), la25_stub_offset_(-1U),
916 has_static_relocs_(false), no_lazy_stub_(false), lazy_stub_offset_(0),
917 pointer_equality_needed_(false), global_got_area_(GGA_NONE
),
918 global_gotoffset_(-1U), got_only_for_calls_(true), has_lazy_stub_(false),
919 needs_mips_plt_(false), needs_comp_plt_(false), mips_plt_offset_(-1U),
920 comp_plt_offset_(-1U), mips16_fn_stub_(NULL
), mips16_call_stub_(NULL
),
921 mips16_call_fp_stub_(NULL
), applied_secondary_got_fixup_(false)
924 // Return whether this is a MIPS16 symbol.
928 // (st_other & STO_MIPS16) == STO_MIPS16
929 return ((this->nonvis() & (elfcpp::STO_MIPS16
>> 2))
930 == elfcpp::STO_MIPS16
>> 2);
933 // Return whether this is a microMIPS symbol.
937 // (st_other & STO_MIPS_ISA) == STO_MICROMIPS
938 return ((this->nonvis() & (elfcpp::STO_MIPS_ISA
>> 2))
939 == elfcpp::STO_MICROMIPS
>> 2);
942 // Return whether the symbol needs MIPS16 fn_stub.
945 { return this->need_fn_stub_
; }
947 // Set that the symbol needs MIPS16 fn_stub.
950 { this->need_fn_stub_
= true; }
952 // Return whether this symbol is referenced by branch relocations from
953 // any non-PIC input file.
955 has_nonpic_branches() const
956 { return this->has_nonpic_branches_
; }
958 // Set that this symbol is referenced by branch relocations from
959 // any non-PIC input file.
961 set_has_nonpic_branches()
962 { this->has_nonpic_branches_
= true; }
964 // Return the offset of the la25 stub for this symbol from the start of the
965 // la25 stub section.
967 la25_stub_offset() const
968 { return this->la25_stub_offset_
; }
970 // Set the offset of the la25 stub for this symbol from the start of the
971 // la25 stub section.
973 set_la25_stub_offset(unsigned int offset
)
974 { this->la25_stub_offset_
= offset
; }
976 // Return whether the symbol has la25 stub. This is true if this symbol is
977 // for a PIC function, and there are non-PIC branches and jumps to it.
979 has_la25_stub() const
980 { return this->la25_stub_offset_
!= -1U; }
982 // Return whether there is a relocation against this symbol that must be
983 // resolved by the static linker (that is, the relocation cannot possibly
986 has_static_relocs() const
987 { return this->has_static_relocs_
; }
989 // Set that there is a relocation against this symbol that must be resolved
990 // by the static linker (that is, the relocation cannot possibly be made
993 set_has_static_relocs()
994 { this->has_static_relocs_
= true; }
996 // Return whether we must not create a lazy-binding stub for this symbol.
999 { return this->no_lazy_stub_
; }
1001 // Set that we must not create a lazy-binding stub for this symbol.
1004 { this->no_lazy_stub_
= true; }
1006 // Return the offset of the lazy-binding stub for this symbol from the start
1007 // of .MIPS.stubs section.
1009 lazy_stub_offset() const
1010 { return this->lazy_stub_offset_
; }
1012 // Set the offset of the lazy-binding stub for this symbol from the start
1013 // of .MIPS.stubs section.
1015 set_lazy_stub_offset(unsigned int offset
)
1016 { this->lazy_stub_offset_
= offset
; }
1018 // Return whether there are any relocations for this symbol where
1019 // pointer equality matters.
1021 pointer_equality_needed() const
1022 { return this->pointer_equality_needed_
; }
1024 // Set that there are relocations for this symbol where pointer equality
1027 set_pointer_equality_needed()
1028 { this->pointer_equality_needed_
= true; }
1030 // Return global GOT area where this symbol in located.
1032 global_got_area() const
1033 { return this->global_got_area_
; }
1035 // Set global GOT area where this symbol in located.
1037 set_global_got_area(Global_got_area global_got_area
)
1038 { this->global_got_area_
= global_got_area
; }
1040 // Return the global GOT offset for this symbol. For multi-GOT links, this
1041 // returns the offset from the start of .got section to the first GOT entry
1042 // for the symbol. Note that in multi-GOT links the symbol can have entry
1043 // in more than one GOT.
1045 global_gotoffset() const
1046 { return this->global_gotoffset_
; }
1048 // Set the global GOT offset for this symbol. Note that in multi-GOT links
1049 // the symbol can have entry in more than one GOT. This method will set
1050 // the offset only if it is less than current offset.
1052 set_global_gotoffset(unsigned int offset
)
1054 if (this->global_gotoffset_
== -1U || offset
< this->global_gotoffset_
)
1055 this->global_gotoffset_
= offset
;
1058 // Return whether all GOT relocations for this symbol are for calls.
1060 got_only_for_calls() const
1061 { return this->got_only_for_calls_
; }
1063 // Set that there is a GOT relocation for this symbol that is not for call.
1065 set_got_not_only_for_calls()
1066 { this->got_only_for_calls_
= false; }
1068 // Return whether this is a PIC symbol.
1072 // (st_other & STO_MIPS_FLAGS) == STO_MIPS_PIC
1073 return ((this->nonvis() & (elfcpp::STO_MIPS_FLAGS
>> 2))
1074 == (elfcpp::STO_MIPS_PIC
>> 2));
1077 // Set the flag in st_other field that marks this symbol as PIC.
1081 if (this->is_mips16())
1082 // (st_other & ~(STO_MIPS16 | STO_MIPS_FLAGS)) | STO_MIPS_PIC
1083 this->set_nonvis((this->nonvis()
1084 & ~((elfcpp::STO_MIPS16
>> 2)
1085 | (elfcpp::STO_MIPS_FLAGS
>> 2)))
1086 | (elfcpp::STO_MIPS_PIC
>> 2));
1088 // (other & ~STO_MIPS_FLAGS) | STO_MIPS_PIC
1089 this->set_nonvis((this->nonvis() & ~(elfcpp::STO_MIPS_FLAGS
>> 2))
1090 | (elfcpp::STO_MIPS_PIC
>> 2));
1093 // Set the flag in st_other field that marks this symbol as PLT.
1097 if (this->is_mips16())
1098 // (st_other & (STO_MIPS16 | ~STO_MIPS_FLAGS)) | STO_MIPS_PLT
1099 this->set_nonvis((this->nonvis()
1100 & ((elfcpp::STO_MIPS16
>> 2)
1101 | ~(elfcpp::STO_MIPS_FLAGS
>> 2)))
1102 | (elfcpp::STO_MIPS_PLT
>> 2));
1105 // (st_other & ~STO_MIPS_FLAGS) | STO_MIPS_PLT
1106 this->set_nonvis((this->nonvis() & ~(elfcpp::STO_MIPS_FLAGS
>> 2))
1107 | (elfcpp::STO_MIPS_PLT
>> 2));
1110 // Downcast a base pointer to a Mips_symbol pointer.
1111 static Mips_symbol
<size
>*
1112 as_mips_sym(Symbol
* sym
)
1113 { return static_cast<Mips_symbol
<size
>*>(sym
); }
1115 // Downcast a base pointer to a Mips_symbol pointer.
1116 static const Mips_symbol
<size
>*
1117 as_mips_sym(const Symbol
* sym
)
1118 { return static_cast<const Mips_symbol
<size
>*>(sym
); }
1120 // Return whether the symbol has lazy-binding stub.
1122 has_lazy_stub() const
1123 { return this->has_lazy_stub_
; }
1125 // Set whether the symbol has lazy-binding stub.
1127 set_has_lazy_stub(bool has_lazy_stub
)
1128 { this->has_lazy_stub_
= has_lazy_stub
; }
1130 // Return whether the symbol needs a standard PLT entry.
1132 needs_mips_plt() const
1133 { return this->needs_mips_plt_
; }
1135 // Set whether the symbol needs a standard PLT entry.
1137 set_needs_mips_plt(bool needs_mips_plt
)
1138 { this->needs_mips_plt_
= needs_mips_plt
; }
1140 // Return whether the symbol needs a compressed (MIPS16 or microMIPS) PLT
1143 needs_comp_plt() const
1144 { return this->needs_comp_plt_
; }
1146 // Set whether the symbol needs a compressed (MIPS16 or microMIPS) PLT entry.
1148 set_needs_comp_plt(bool needs_comp_plt
)
1149 { this->needs_comp_plt_
= needs_comp_plt
; }
1151 // Return standard PLT entry offset, or -1 if none.
1153 mips_plt_offset() const
1154 { return this->mips_plt_offset_
; }
1156 // Set standard PLT entry offset.
1158 set_mips_plt_offset(unsigned int mips_plt_offset
)
1159 { this->mips_plt_offset_
= mips_plt_offset
; }
1161 // Return whether the symbol has standard PLT entry.
1163 has_mips_plt_offset() const
1164 { return this->mips_plt_offset_
!= -1U; }
1166 // Return compressed (MIPS16 or microMIPS) PLT entry offset, or -1 if none.
1168 comp_plt_offset() const
1169 { return this->comp_plt_offset_
; }
1171 // Set compressed (MIPS16 or microMIPS) PLT entry offset.
1173 set_comp_plt_offset(unsigned int comp_plt_offset
)
1174 { this->comp_plt_offset_
= comp_plt_offset
; }
1176 // Return whether the symbol has compressed (MIPS16 or microMIPS) PLT entry.
1178 has_comp_plt_offset() const
1179 { return this->comp_plt_offset_
!= -1U; }
1181 // Return MIPS16 fn stub for a symbol.
1182 template<bool big_endian
>
1183 Mips16_stub_section
<size
, big_endian
>*
1184 get_mips16_fn_stub() const
1186 return static_cast<Mips16_stub_section
<size
, big_endian
>*>(mips16_fn_stub_
);
1189 // Set MIPS16 fn stub for a symbol.
1191 set_mips16_fn_stub(Mips16_stub_section_base
* stub
)
1192 { this->mips16_fn_stub_
= stub
; }
1194 // Return whether symbol has MIPS16 fn stub.
1196 has_mips16_fn_stub() const
1197 { return this->mips16_fn_stub_
!= NULL
; }
1199 // Return MIPS16 call stub for a symbol.
1200 template<bool big_endian
>
1201 Mips16_stub_section
<size
, big_endian
>*
1202 get_mips16_call_stub() const
1204 return static_cast<Mips16_stub_section
<size
, big_endian
>*>(
1208 // Set MIPS16 call stub for a symbol.
1210 set_mips16_call_stub(Mips16_stub_section_base
* stub
)
1211 { this->mips16_call_stub_
= stub
; }
1213 // Return whether symbol has MIPS16 call stub.
1215 has_mips16_call_stub() const
1216 { return this->mips16_call_stub_
!= NULL
; }
1218 // Return MIPS16 call_fp stub for a symbol.
1219 template<bool big_endian
>
1220 Mips16_stub_section
<size
, big_endian
>*
1221 get_mips16_call_fp_stub() const
1223 return static_cast<Mips16_stub_section
<size
, big_endian
>*>(
1224 mips16_call_fp_stub_
);
1227 // Set MIPS16 call_fp stub for a symbol.
1229 set_mips16_call_fp_stub(Mips16_stub_section_base
* stub
)
1230 { this->mips16_call_fp_stub_
= stub
; }
1232 // Return whether symbol has MIPS16 call_fp stub.
1234 has_mips16_call_fp_stub() const
1235 { return this->mips16_call_fp_stub_
!= NULL
; }
1238 get_applied_secondary_got_fixup() const
1239 { return applied_secondary_got_fixup_
; }
1242 set_applied_secondary_got_fixup()
1243 { this->applied_secondary_got_fixup_
= true; }
1246 // Whether the symbol needs MIPS16 fn_stub. This is true if this symbol
1247 // appears in any relocs other than a 16 bit call.
1250 // True if this symbol is referenced by branch relocations from
1251 // any non-PIC input file. This is used to determine whether an
1252 // la25 stub is required.
1253 bool has_nonpic_branches_
;
1255 // The offset of the la25 stub for this symbol from the start of the
1256 // la25 stub section.
1257 unsigned int la25_stub_offset_
;
1259 // True if there is a relocation against this symbol that must be
1260 // resolved by the static linker (that is, the relocation cannot
1261 // possibly be made dynamic).
1262 bool has_static_relocs_
;
1264 // Whether we must not create a lazy-binding stub for this symbol.
1265 // This is true if the symbol has relocations related to taking the
1266 // function's address.
1269 // The offset of the lazy-binding stub for this symbol from the start of
1270 // .MIPS.stubs section.
1271 unsigned int lazy_stub_offset_
;
1273 // True if there are any relocations for this symbol where pointer equality
1275 bool pointer_equality_needed_
;
1277 // Global GOT area where this symbol in located, or GGA_NONE if symbol is not
1278 // in the global part of the GOT.
1279 Global_got_area global_got_area_
;
1281 // The global GOT offset for this symbol. For multi-GOT links, this is offset
1282 // from the start of .got section to the first GOT entry for the symbol.
1283 // Note that in multi-GOT links the symbol can have entry in more than one GOT.
1284 unsigned int global_gotoffset_
;
1286 // Whether all GOT relocations for this symbol are for calls.
1287 bool got_only_for_calls_
;
1288 // Whether the symbol has lazy-binding stub.
1289 bool has_lazy_stub_
;
1290 // Whether the symbol needs a standard PLT entry.
1291 bool needs_mips_plt_
;
1292 // Whether the symbol needs a compressed (MIPS16 or microMIPS) PLT entry.
1293 bool needs_comp_plt_
;
1294 // Standard PLT entry offset, or -1 if none.
1295 unsigned int mips_plt_offset_
;
1296 // Compressed (MIPS16 or microMIPS) PLT entry offset, or -1 if none.
1297 unsigned int comp_plt_offset_
;
1298 // MIPS16 fn stub for a symbol.
1299 Mips16_stub_section_base
* mips16_fn_stub_
;
1300 // MIPS16 call stub for a symbol.
1301 Mips16_stub_section_base
* mips16_call_stub_
;
1302 // MIPS16 call_fp stub for a symbol.
1303 Mips16_stub_section_base
* mips16_call_fp_stub_
;
1305 bool applied_secondary_got_fixup_
;
1308 // Mips16_stub_section class.
1310 // The mips16 compiler uses a couple of special sections to handle
1311 // floating point arguments.
1313 // Section names that look like .mips16.fn.FNNAME contain stubs that
1314 // copy floating point arguments from the fp regs to the gp regs and
1315 // then jump to FNNAME. If any 32 bit function calls FNNAME, the
1316 // call should be redirected to the stub instead. If no 32 bit
1317 // function calls FNNAME, the stub should be discarded. We need to
1318 // consider any reference to the function, not just a call, because
1319 // if the address of the function is taken we will need the stub,
1320 // since the address might be passed to a 32 bit function.
1322 // Section names that look like .mips16.call.FNNAME contain stubs
1323 // that copy floating point arguments from the gp regs to the fp
1324 // regs and then jump to FNNAME. If FNNAME is a 32 bit function,
1325 // then any 16 bit function that calls FNNAME should be redirected
1326 // to the stub instead. If FNNAME is not a 32 bit function, the
1327 // stub should be discarded.
1329 // .mips16.call.fp.FNNAME sections are similar, but contain stubs
1330 // which call FNNAME and then copy the return value from the fp regs
1331 // to the gp regs. These stubs store the return address in $18 while
1332 // calling FNNAME; any function which might call one of these stubs
1333 // must arrange to save $18 around the call. (This case is not
1334 // needed for 32 bit functions that call 16 bit functions, because
1335 // 16 bit functions always return floating point values in both
1336 // $f0/$f1 and $2/$3.)
1338 // Note that in all cases FNNAME might be defined statically.
1339 // Therefore, FNNAME is not used literally. Instead, the relocation
1340 // information will indicate which symbol the section is for.
1342 // We record any stubs that we find in the symbol table.
1344 // TODO(sasa): All mips16 stub sections should be emitted in the .text section.
1346 class Mips16_stub_section_base
{ };
1348 template<int size
, bool big_endian
>
1349 class Mips16_stub_section
: public Mips16_stub_section_base
1351 typedef typename
elfcpp::Elf_types
<size
>::Elf_Addr Mips_address
;
1354 Mips16_stub_section(Mips_relobj
<size
, big_endian
>* object
, unsigned int shndx
)
1355 : object_(object
), shndx_(shndx
), r_sym_(0), gsym_(NULL
),
1356 found_r_mips_none_(false)
1358 gold_assert(object
->is_mips16_fn_stub_section(shndx
)
1359 || object
->is_mips16_call_stub_section(shndx
)
1360 || object
->is_mips16_call_fp_stub_section(shndx
));
1363 // Return the object of this stub section.
1364 Mips_relobj
<size
, big_endian
>*
1366 { return this->object_
; }
1368 // Return the size of a section.
1370 section_size() const
1371 { return this->object_
->section_size(this->shndx_
); }
1373 // Return section index of this stub section.
1376 { return this->shndx_
; }
1378 // Return symbol index, if stub is for a local function.
1381 { return this->r_sym_
; }
1383 // Return symbol, if stub is for a global function.
1386 { return this->gsym_
; }
1388 // Return whether stub is for a local function.
1390 is_for_local_function() const
1391 { return this->gsym_
== NULL
; }
1393 // This method is called when a new relocation R_TYPE for local symbol R_SYM
1394 // is found in the stub section. Try to find stub target.
1396 new_local_reloc_found(unsigned int r_type
, unsigned int r_sym
)
1398 // To find target symbol for this stub, trust the first R_MIPS_NONE
1399 // relocation, if any. Otherwise trust the first relocation, whatever
1401 if (this->found_r_mips_none_
)
1403 if (r_type
== elfcpp::R_MIPS_NONE
)
1405 this->r_sym_
= r_sym
;
1407 this->found_r_mips_none_
= true;
1409 else if (!is_target_found())
1410 this->r_sym_
= r_sym
;
1413 // This method is called when a new relocation R_TYPE for global symbol GSYM
1414 // is found in the stub section. Try to find stub target.
1416 new_global_reloc_found(unsigned int r_type
, Mips_symbol
<size
>* gsym
)
1418 // To find target symbol for this stub, trust the first R_MIPS_NONE
1419 // relocation, if any. Otherwise trust the first relocation, whatever
1421 if (this->found_r_mips_none_
)
1423 if (r_type
== elfcpp::R_MIPS_NONE
)
1427 this->found_r_mips_none_
= true;
1429 else if (!is_target_found())
1433 // Return whether we found the stub target.
1435 is_target_found() const
1436 { return this->r_sym_
!= 0 || this->gsym_
!= NULL
; }
1438 // Return whether this is a fn stub.
1441 { return this->object_
->is_mips16_fn_stub_section(this->shndx_
); }
1443 // Return whether this is a call stub.
1445 is_call_stub() const
1446 { return this->object_
->is_mips16_call_stub_section(this->shndx_
); }
1448 // Return whether this is a call_fp stub.
1450 is_call_fp_stub() const
1451 { return this->object_
->is_mips16_call_fp_stub_section(this->shndx_
); }
1453 // Return the output address.
1455 output_address() const
1457 return (this->object_
->output_section(this->shndx_
)->address()
1458 + this->object_
->output_section_offset(this->shndx_
));
1462 // The object of this stub section.
1463 Mips_relobj
<size
, big_endian
>* object_
;
1464 // The section index of this stub section.
1465 unsigned int shndx_
;
1466 // The symbol index, if stub is for a local function.
1467 unsigned int r_sym_
;
1468 // The symbol, if stub is for a global function.
1469 Mips_symbol
<size
>* gsym_
;
1470 // True if we found R_MIPS_NONE relocation in this stub.
1471 bool found_r_mips_none_
;
1474 // Mips_relobj class.
1476 template<int size
, bool big_endian
>
1477 class Mips_relobj
: public Sized_relobj_file
<size
, big_endian
>
1479 typedef typename
elfcpp::Elf_types
<size
>::Elf_Addr Mips_address
;
1480 typedef std::map
<unsigned int, Mips16_stub_section
<size
, big_endian
>*>
1481 Mips16_stubs_int_map
;
1482 typedef typename
elfcpp::Swap
<size
, big_endian
>::Valtype Valtype
;
1485 Mips_relobj(const std::string
& name
, Input_file
* input_file
, off_t offset
,
1486 const typename
elfcpp::Ehdr
<size
, big_endian
>& ehdr
)
1487 : Sized_relobj_file
<size
, big_endian
>(name
, input_file
, offset
, ehdr
),
1488 processor_specific_flags_(0), local_symbol_is_mips16_(),
1489 local_symbol_is_micromips_(), mips16_stub_sections_(),
1490 local_non_16bit_calls_(), local_16bit_calls_(), local_mips16_fn_stubs_(),
1491 local_mips16_call_stubs_(), gp_(0), got_info_(NULL
),
1492 section_is_mips16_fn_stub_(), section_is_mips16_call_stub_(),
1493 section_is_mips16_call_fp_stub_(), pdr_shndx_(-1U), gprmask_(0),
1494 cprmask1_(0), cprmask2_(0), cprmask3_(0), cprmask4_(0)
1496 this->is_pic_
= (ehdr
.get_e_flags() & elfcpp::EF_MIPS_PIC
) != 0;
1497 this->is_n32_
= elfcpp::abi_n32(ehdr
.get_e_flags());
1498 this->is_n64_
= elfcpp::abi_64(ehdr
.get_e_ident()[elfcpp::EI_CLASS
]);
1504 // Downcast a base pointer to a Mips_relobj pointer. This is
1505 // not type-safe but we only use Mips_relobj not the base class.
1506 static Mips_relobj
<size
, big_endian
>*
1507 as_mips_relobj(Relobj
* relobj
)
1508 { return static_cast<Mips_relobj
<size
, big_endian
>*>(relobj
); }
1510 // Downcast a base pointer to a Mips_relobj pointer. This is
1511 // not type-safe but we only use Mips_relobj not the base class.
1512 static const Mips_relobj
<size
, big_endian
>*
1513 as_mips_relobj(const Relobj
* relobj
)
1514 { return static_cast<const Mips_relobj
<size
, big_endian
>*>(relobj
); }
1516 // Processor-specific flags in ELF file header. This is valid only after
1519 processor_specific_flags() const
1520 { return this->processor_specific_flags_
; }
1522 // Whether a local symbol is MIPS16 symbol. R_SYM is the symbol table
1523 // index. This is only valid after do_count_local_symbol is called.
1525 local_symbol_is_mips16(unsigned int r_sym
) const
1527 gold_assert(r_sym
< this->local_symbol_is_mips16_
.size());
1528 return this->local_symbol_is_mips16_
[r_sym
];
1531 // Whether a local symbol is microMIPS symbol. R_SYM is the symbol table
1532 // index. This is only valid after do_count_local_symbol is called.
1534 local_symbol_is_micromips(unsigned int r_sym
) const
1536 gold_assert(r_sym
< this->local_symbol_is_micromips_
.size());
1537 return this->local_symbol_is_micromips_
[r_sym
];
1540 // Get or create MIPS16 stub section.
1541 Mips16_stub_section
<size
, big_endian
>*
1542 get_mips16_stub_section(unsigned int shndx
)
1544 typename
Mips16_stubs_int_map::const_iterator it
=
1545 this->mips16_stub_sections_
.find(shndx
);
1546 if (it
!= this->mips16_stub_sections_
.end())
1547 return (*it
).second
;
1549 Mips16_stub_section
<size
, big_endian
>* stub_section
=
1550 new Mips16_stub_section
<size
, big_endian
>(this, shndx
);
1551 this->mips16_stub_sections_
.insert(
1552 std::pair
<unsigned int, Mips16_stub_section
<size
, big_endian
>*>(
1553 stub_section
->shndx(), stub_section
));
1554 return stub_section
;
1557 // Return MIPS16 fn stub section for local symbol R_SYM, or NULL if this
1558 // object doesn't have fn stub for R_SYM.
1559 Mips16_stub_section
<size
, big_endian
>*
1560 get_local_mips16_fn_stub(unsigned int r_sym
) const
1562 typename
Mips16_stubs_int_map::const_iterator it
=
1563 this->local_mips16_fn_stubs_
.find(r_sym
);
1564 if (it
!= this->local_mips16_fn_stubs_
.end())
1565 return (*it
).second
;
1569 // Record that this object has MIPS16 fn stub for local symbol. This method
1570 // is only called if we decided not to discard the stub.
1572 add_local_mips16_fn_stub(Mips16_stub_section
<size
, big_endian
>* stub
)
1574 gold_assert(stub
->is_for_local_function());
1575 unsigned int r_sym
= stub
->r_sym();
1576 this->local_mips16_fn_stubs_
.insert(
1577 std::pair
<unsigned int, Mips16_stub_section
<size
, big_endian
>*>(
1581 // Return MIPS16 call stub section for local symbol R_SYM, or NULL if this
1582 // object doesn't have call stub for R_SYM.
1583 Mips16_stub_section
<size
, big_endian
>*
1584 get_local_mips16_call_stub(unsigned int r_sym
) const
1586 typename
Mips16_stubs_int_map::const_iterator it
=
1587 this->local_mips16_call_stubs_
.find(r_sym
);
1588 if (it
!= this->local_mips16_call_stubs_
.end())
1589 return (*it
).second
;
1593 // Record that this object has MIPS16 call stub for local symbol. This method
1594 // is only called if we decided not to discard the stub.
1596 add_local_mips16_call_stub(Mips16_stub_section
<size
, big_endian
>* stub
)
1598 gold_assert(stub
->is_for_local_function());
1599 unsigned int r_sym
= stub
->r_sym();
1600 this->local_mips16_call_stubs_
.insert(
1601 std::pair
<unsigned int, Mips16_stub_section
<size
, big_endian
>*>(
1605 // Record that we found "non 16-bit" call relocation against local symbol
1606 // SYMNDX. This reloc would need to refer to a MIPS16 fn stub, if there
1609 add_local_non_16bit_call(unsigned int symndx
)
1610 { this->local_non_16bit_calls_
.insert(symndx
); }
1612 // Return true if there is any "non 16-bit" call relocation against local
1613 // symbol SYMNDX in this object.
1615 has_local_non_16bit_call_relocs(unsigned int symndx
)
1617 return (this->local_non_16bit_calls_
.find(symndx
)
1618 != this->local_non_16bit_calls_
.end());
1621 // Record that we found 16-bit call relocation R_MIPS16_26 against local
1622 // symbol SYMNDX. Local MIPS16 call or call_fp stubs will only be needed
1623 // if there is some R_MIPS16_26 relocation that refers to the stub symbol.
1625 add_local_16bit_call(unsigned int symndx
)
1626 { this->local_16bit_calls_
.insert(symndx
); }
1628 // Return true if there is any 16-bit call relocation R_MIPS16_26 against local
1629 // symbol SYMNDX in this object.
1631 has_local_16bit_call_relocs(unsigned int symndx
)
1633 return (this->local_16bit_calls_
.find(symndx
)
1634 != this->local_16bit_calls_
.end());
1637 // Get gp value that was used to create this object.
1640 { return this->gp_
; }
1642 // Return whether the object is a PIC object.
1645 { return this->is_pic_
; }
1647 // Return whether the object uses N32 ABI.
1650 { return this->is_n32_
; }
1652 // Return whether the object uses N64 ABI.
1655 { return this->is_n64_
; }
1657 // Return whether the object uses NewABI conventions.
1660 { return this->is_n32_
|| this->is_n64_
; }
1662 // Return Mips_got_info for this object.
1663 Mips_got_info
<size
, big_endian
>*
1664 get_got_info() const
1665 { return this->got_info_
; }
1667 // Return Mips_got_info for this object. Create new info if it doesn't exist.
1668 Mips_got_info
<size
, big_endian
>*
1669 get_or_create_got_info()
1671 if (!this->got_info_
)
1672 this->got_info_
= new Mips_got_info
<size
, big_endian
>();
1673 return this->got_info_
;
1676 // Set Mips_got_info for this object.
1678 set_got_info(Mips_got_info
<size
, big_endian
>* got_info
)
1679 { this->got_info_
= got_info
; }
1681 // Whether a section SHDNX is a MIPS16 stub section. This is only valid
1682 // after do_read_symbols is called.
1684 is_mips16_stub_section(unsigned int shndx
)
1686 return (is_mips16_fn_stub_section(shndx
)
1687 || is_mips16_call_stub_section(shndx
)
1688 || is_mips16_call_fp_stub_section(shndx
));
1691 // Return TRUE if relocations in section SHNDX can refer directly to a
1692 // MIPS16 function rather than to a hard-float stub. This is only valid
1693 // after do_read_symbols is called.
1695 section_allows_mips16_refs(unsigned int shndx
)
1697 return (this->is_mips16_stub_section(shndx
) || shndx
== this->pdr_shndx_
);
1700 // Whether a section SHDNX is a MIPS16 fn stub section. This is only valid
1701 // after do_read_symbols is called.
1703 is_mips16_fn_stub_section(unsigned int shndx
)
1705 gold_assert(shndx
< this->section_is_mips16_fn_stub_
.size());
1706 return this->section_is_mips16_fn_stub_
[shndx
];
1709 // Whether a section SHDNX is a MIPS16 call stub section. This is only valid
1710 // after do_read_symbols is called.
1712 is_mips16_call_stub_section(unsigned int shndx
)
1714 gold_assert(shndx
< this->section_is_mips16_call_stub_
.size());
1715 return this->section_is_mips16_call_stub_
[shndx
];
1718 // Whether a section SHDNX is a MIPS16 call_fp stub section. This is only
1719 // valid after do_read_symbols is called.
1721 is_mips16_call_fp_stub_section(unsigned int shndx
)
1723 gold_assert(shndx
< this->section_is_mips16_call_fp_stub_
.size());
1724 return this->section_is_mips16_call_fp_stub_
[shndx
];
1727 // Discard MIPS16 stub secions that are not needed.
1729 discard_mips16_stub_sections(Symbol_table
* symtab
);
1731 // Return gprmask from the .reginfo section of this object.
1734 { return this->gprmask_
; }
1736 // Return cprmask1 from the .reginfo section of this object.
1739 { return this->cprmask1_
; }
1741 // Return cprmask2 from the .reginfo section of this object.
1744 { return this->cprmask2_
; }
1746 // Return cprmask3 from the .reginfo section of this object.
1749 { return this->cprmask3_
; }
1751 // Return cprmask4 from the .reginfo section of this object.
1754 { return this->cprmask4_
; }
1757 // Count the local symbols.
1759 do_count_local_symbols(Stringpool_template
<char>*,
1760 Stringpool_template
<char>*);
1762 // Read the symbol information.
1764 do_read_symbols(Read_symbols_data
* sd
);
1767 // processor-specific flags in ELF file header.
1768 elfcpp::Elf_Word processor_specific_flags_
;
1770 // Bit vector to tell if a local symbol is a MIPS16 symbol or not.
1771 // This is only valid after do_count_local_symbol is called.
1772 std::vector
<bool> local_symbol_is_mips16_
;
1774 // Bit vector to tell if a local symbol is a microMIPS symbol or not.
1775 // This is only valid after do_count_local_symbol is called.
1776 std::vector
<bool> local_symbol_is_micromips_
;
1778 // Map from section index to the MIPS16 stub for that section. This contains
1779 // all stubs found in this object.
1780 Mips16_stubs_int_map mips16_stub_sections_
;
1782 // Local symbols that have "non 16-bit" call relocation. This relocation
1783 // would need to refer to a MIPS16 fn stub, if there is one.
1784 std::set
<unsigned int> local_non_16bit_calls_
;
1786 // Local symbols that have 16-bit call relocation R_MIPS16_26. Local MIPS16
1787 // call or call_fp stubs will only be needed if there is some R_MIPS16_26
1788 // relocation that refers to the stub symbol.
1789 std::set
<unsigned int> local_16bit_calls_
;
1791 // Map from local symbol index to the MIPS16 fn stub for that symbol.
1792 // This contains only the stubs that we decided not to discard.
1793 Mips16_stubs_int_map local_mips16_fn_stubs_
;
1795 // Map from local symbol index to the MIPS16 call stub for that symbol.
1796 // This contains only the stubs that we decided not to discard.
1797 Mips16_stubs_int_map local_mips16_call_stubs_
;
1799 // gp value that was used to create this object.
1801 // Whether the object is a PIC object.
1803 // Whether the object uses N32 ABI.
1805 // Whether the object uses N64 ABI.
1807 // The Mips_got_info for this object.
1808 Mips_got_info
<size
, big_endian
>* got_info_
;
1810 // Bit vector to tell if a section is a MIPS16 fn stub section or not.
1811 // This is only valid after do_read_symbols is called.
1812 std::vector
<bool> section_is_mips16_fn_stub_
;
1814 // Bit vector to tell if a section is a MIPS16 call stub section or not.
1815 // This is only valid after do_read_symbols is called.
1816 std::vector
<bool> section_is_mips16_call_stub_
;
1818 // Bit vector to tell if a section is a MIPS16 call_fp stub section or not.
1819 // This is only valid after do_read_symbols is called.
1820 std::vector
<bool> section_is_mips16_call_fp_stub_
;
1822 // .pdr section index.
1823 unsigned int pdr_shndx_
;
1825 // gprmask from the .reginfo section of this object.
1827 // cprmask1 from the .reginfo section of this object.
1829 // cprmask2 from the .reginfo section of this object.
1831 // cprmask3 from the .reginfo section of this object.
1833 // cprmask4 from the .reginfo section of this object.
1837 // Mips_output_data_got class.
1839 template<int size
, bool big_endian
>
1840 class Mips_output_data_got
: public Output_data_got
<size
, big_endian
>
1842 typedef typename
elfcpp::Elf_types
<size
>::Elf_Addr Mips_address
;
1843 typedef Output_data_reloc
<elfcpp::SHT_REL
, true, size
, big_endian
>
1845 typedef typename
elfcpp::Swap
<size
, big_endian
>::Valtype Valtype
;
1848 Mips_output_data_got(Target_mips
<size
, big_endian
>* target
,
1849 Symbol_table
* symtab
, Layout
* layout
)
1850 : Output_data_got
<size
, big_endian
>(), target_(target
),
1851 symbol_table_(symtab
), layout_(layout
), static_relocs_(), got_view_(NULL
),
1852 first_global_got_dynsym_index_(-1U), primary_got_(NULL
),
1853 secondary_got_relocs_()
1855 this->master_got_info_
= new Mips_got_info
<size
, big_endian
>();
1856 this->set_addralign(16);
1859 // Reserve GOT entry for a GOT relocation of type R_TYPE against symbol
1860 // SYMNDX + ADDEND, where SYMNDX is a local symbol in section SHNDX in OBJECT.
1862 record_local_got_symbol(Mips_relobj
<size
, big_endian
>* object
,
1863 unsigned int symndx
, Mips_address addend
,
1864 unsigned int r_type
, unsigned int shndx
)
1866 this->master_got_info_
->record_local_got_symbol(object
, symndx
, addend
,
1870 // Reserve GOT entry for a GOT relocation of type R_TYPE against MIPS_SYM,
1871 // in OBJECT. FOR_CALL is true if the caller is only interested in
1872 // using the GOT entry for calls. DYN_RELOC is true if R_TYPE is a dynamic
1875 record_global_got_symbol(Mips_symbol
<size
>* mips_sym
,
1876 Mips_relobj
<size
, big_endian
>* object
,
1877 unsigned int r_type
, bool dyn_reloc
, bool for_call
)
1879 this->master_got_info_
->record_global_got_symbol(mips_sym
, object
, r_type
,
1880 dyn_reloc
, for_call
);
1883 // Record that OBJECT has a page relocation against symbol SYMNDX and
1884 // that ADDEND is the addend for that relocation.
1886 record_got_page_entry(Mips_relobj
<size
, big_endian
>* object
,
1887 unsigned int symndx
, int addend
)
1888 { this->master_got_info_
->record_got_page_entry(object
, symndx
, addend
); }
1890 // Add a static entry for the GOT entry at OFFSET. GSYM is a global
1891 // symbol and R_TYPE is the code of a dynamic relocation that needs to be
1892 // applied in a static link.
1894 add_static_reloc(unsigned int got_offset
, unsigned int r_type
,
1895 Mips_symbol
<size
>* gsym
)
1896 { this->static_relocs_
.push_back(Static_reloc(got_offset
, r_type
, gsym
)); }
1898 // Add a static reloc for the GOT entry at OFFSET. RELOBJ is an object
1899 // defining a local symbol with INDEX. R_TYPE is the code of a dynamic
1900 // relocation that needs to be applied in a static link.
1902 add_static_reloc(unsigned int got_offset
, unsigned int r_type
,
1903 Sized_relobj_file
<size
, big_endian
>* relobj
,
1906 this->static_relocs_
.push_back(Static_reloc(got_offset
, r_type
, relobj
,
1910 // Record that global symbol GSYM has R_TYPE dynamic relocation in the
1911 // secondary GOT at OFFSET.
1913 add_secondary_got_reloc(unsigned int got_offset
, unsigned int r_type
,
1914 Mips_symbol
<size
>* gsym
)
1916 this->secondary_got_relocs_
.push_back(Static_reloc(got_offset
,
1920 // Update GOT entry at OFFSET with VALUE.
1922 update_got_entry(unsigned int offset
, Mips_address value
)
1924 elfcpp::Swap
<size
, big_endian
>::writeval(this->got_view_
+ offset
, value
);
1927 // Return the number of entries in local part of the GOT. This includes
1928 // local entries, page entries and 2 reserved entries.
1930 get_local_gotno() const
1932 if (!this->multi_got())
1934 return (2 + this->master_got_info_
->local_gotno()
1935 + this->master_got_info_
->page_gotno());
1938 return 2 + this->primary_got_
->local_gotno() + this->primary_got_
->page_gotno();
1941 // Return dynamic symbol table index of the first symbol with global GOT
1944 first_global_got_dynsym_index() const
1945 { return this->first_global_got_dynsym_index_
; }
1947 // Set dynamic symbol table index of the first symbol with global GOT entry.
1949 set_first_global_got_dynsym_index(unsigned int index
)
1950 { this->first_global_got_dynsym_index_
= index
; }
1952 // Lay out the GOT. Add local, global and TLS entries. If GOT is
1953 // larger than 64K, create multi-GOT.
1955 lay_out_got(Layout
* layout
, Symbol_table
* symtab
,
1956 const Input_objects
* input_objects
);
1958 // Create multi-GOT. For every GOT, add local, global and TLS entries.
1960 lay_out_multi_got(Layout
* layout
, const Input_objects
* input_objects
);
1962 // Attempt to merge GOTs of different input objects.
1964 merge_gots(const Input_objects
* input_objects
);
1966 // Consider merging FROM, which is OBJECT's GOT, into TO. Return false if
1967 // this would lead to overflow, true if they were merged successfully.
1969 merge_got_with(Mips_got_info
<size
, big_endian
>* from
,
1970 Mips_relobj
<size
, big_endian
>* object
,
1971 Mips_got_info
<size
, big_endian
>* to
);
1973 // Return the offset of GOT page entry for VALUE. For multi-GOT links,
1974 // use OBJECT's GOT.
1976 get_got_page_offset(Mips_address value
,
1977 const Mips_relobj
<size
, big_endian
>* object
)
1979 Mips_got_info
<size
, big_endian
>* g
= (!this->multi_got()
1980 ? this->master_got_info_
1981 : object
->get_got_info());
1982 gold_assert(g
!= NULL
);
1983 return g
->get_got_page_offset(value
, this);
1986 // Return the GOT offset of type GOT_TYPE of the global symbol
1987 // GSYM. For multi-GOT links, use OBJECT's GOT.
1988 unsigned int got_offset(const Symbol
* gsym
, unsigned int got_type
,
1989 Mips_relobj
<size
, big_endian
>* object
) const
1991 if (!this->multi_got())
1992 return gsym
->got_offset(got_type
);
1995 Mips_got_info
<size
, big_endian
>* g
= object
->get_got_info();
1996 gold_assert(g
!= NULL
);
1997 return gsym
->got_offset(g
->multigot_got_type(got_type
));
2001 // Return the GOT offset of type GOT_TYPE of the local symbol
2004 got_offset(unsigned int symndx
, unsigned int got_type
,
2005 Sized_relobj_file
<size
, big_endian
>* object
) const
2006 { return object
->local_got_offset(symndx
, got_type
); }
2008 // Return the offset of TLS LDM entry. For multi-GOT links, use OBJECT's GOT.
2010 tls_ldm_offset(Mips_relobj
<size
, big_endian
>* object
) const
2012 Mips_got_info
<size
, big_endian
>* g
= (!this->multi_got()
2013 ? this->master_got_info_
2014 : object
->get_got_info());
2015 gold_assert(g
!= NULL
);
2016 return g
->tls_ldm_offset();
2019 // Set the offset of TLS LDM entry. For multi-GOT links, use OBJECT's GOT.
2021 set_tls_ldm_offset(unsigned int tls_ldm_offset
,
2022 Mips_relobj
<size
, big_endian
>* object
)
2024 Mips_got_info
<size
, big_endian
>* g
= (!this->multi_got()
2025 ? this->master_got_info_
2026 : object
->get_got_info());
2027 gold_assert(g
!= NULL
);
2028 g
->set_tls_ldm_offset(tls_ldm_offset
);
2031 // Return true for multi-GOT links.
2034 { return this->primary_got_
!= NULL
; }
2036 // Return the offset of OBJECT's GOT from the start of .got section.
2038 get_got_offset(const Mips_relobj
<size
, big_endian
>* object
)
2040 if (!this->multi_got())
2044 Mips_got_info
<size
, big_endian
>* g
= object
->get_got_info();
2045 return g
!= NULL
? g
->offset() : 0;
2049 // Create global GOT entries that should be in the GGA_RELOC_ONLY area.
2051 add_reloc_only_entries()
2052 { this->master_got_info_
->add_reloc_only_entries(this); }
2054 // Return offset of the primary GOT's entry for global symbol.
2056 get_primary_got_offset(const Mips_symbol
<size
>* sym
) const
2058 gold_assert(sym
->global_got_area() != GGA_NONE
);
2059 return (this->get_local_gotno() + sym
->dynsym_index()
2060 - this->first_global_got_dynsym_index()) * size
/8;
2063 // For the entry at offset GOT_OFFSET, return its offset from the gp.
2064 // Input argument GOT_OFFSET is always global offset from the start of
2065 // .got section, for both single and multi-GOT links.
2066 // For single GOT links, this returns GOT_OFFSET - 0x7FF0. For multi-GOT
2067 // links, the return value is object_got_offset - 0x7FF0, where
2068 // object_got_offset is offset in the OBJECT's GOT.
2070 gp_offset(unsigned int got_offset
,
2071 const Mips_relobj
<size
, big_endian
>* object
) const
2073 return (this->address() + got_offset
2074 - this->target_
->adjusted_gp_value(object
));
2078 // Write out the GOT table.
2080 do_write(Output_file
*);
2084 // This class represent dynamic relocations that need to be applied by
2085 // gold because we are using TLS relocations in a static link.
2089 Static_reloc(unsigned int got_offset
, unsigned int r_type
,
2090 Mips_symbol
<size
>* gsym
)
2091 : got_offset_(got_offset
), r_type_(r_type
), symbol_is_global_(true)
2092 { this->u_
.global
.symbol
= gsym
; }
2094 Static_reloc(unsigned int got_offset
, unsigned int r_type
,
2095 Sized_relobj_file
<size
, big_endian
>* relobj
, unsigned int index
)
2096 : got_offset_(got_offset
), r_type_(r_type
), symbol_is_global_(false)
2098 this->u_
.local
.relobj
= relobj
;
2099 this->u_
.local
.index
= index
;
2102 // Return the GOT offset.
2105 { return this->got_offset_
; }
2110 { return this->r_type_
; }
2112 // Whether the symbol is global or not.
2114 symbol_is_global() const
2115 { return this->symbol_is_global_
; }
2117 // For a relocation against a global symbol, the global symbol.
2121 gold_assert(this->symbol_is_global_
);
2122 return this->u_
.global
.symbol
;
2125 // For a relocation against a local symbol, the defining object.
2126 Sized_relobj_file
<size
, big_endian
>*
2129 gold_assert(!this->symbol_is_global_
);
2130 return this->u_
.local
.relobj
;
2133 // For a relocation against a local symbol, the local symbol index.
2137 gold_assert(!this->symbol_is_global_
);
2138 return this->u_
.local
.index
;
2142 // GOT offset of the entry to which this relocation is applied.
2143 unsigned int got_offset_
;
2144 // Type of relocation.
2145 unsigned int r_type_
;
2146 // Whether this relocation is against a global symbol.
2147 bool symbol_is_global_
;
2148 // A global or local symbol.
2153 // For a global symbol, the symbol itself.
2154 Mips_symbol
<size
>* symbol
;
2158 // For a local symbol, the object defining object.
2159 Sized_relobj_file
<size
, big_endian
>* relobj
;
2160 // For a local symbol, the symbol index.
2167 Target_mips
<size
, big_endian
>* target_
;
2168 // The symbol table.
2169 Symbol_table
* symbol_table_
;
2172 // Static relocs to be applied to the GOT.
2173 std::vector
<Static_reloc
> static_relocs_
;
2174 // .got section view.
2175 unsigned char* got_view_
;
2176 // The dynamic symbol table index of the first symbol with global GOT entry.
2177 unsigned int first_global_got_dynsym_index_
;
2178 // The master GOT information.
2179 Mips_got_info
<size
, big_endian
>* master_got_info_
;
2180 // The primary GOT information.
2181 Mips_got_info
<size
, big_endian
>* primary_got_
;
2182 // Secondary GOT fixups.
2183 std::vector
<Static_reloc
> secondary_got_relocs_
;
2186 // A class to handle LA25 stubs - non-PIC interface to a PIC function. There are
2187 // two ways of creating these interfaces. The first is to add:
2189 // lui $25,%hi(func)
2191 // addiu $25,$25,%lo(func)
2193 // to a separate trampoline section. The second is to add:
2195 // lui $25,%hi(func)
2196 // addiu $25,$25,%lo(func)
2198 // immediately before a PIC function "func", but only if a function is at the
2199 // beginning of the section, and the section is not too heavily aligned (i.e we
2200 // would need to add no more than 2 nops before the stub.)
2202 // We only create stubs of the first type.
2204 template<int size
, bool big_endian
>
2205 class Mips_output_data_la25_stub
: public Output_section_data
2207 typedef typename
elfcpp::Elf_types
<size
>::Elf_Addr Mips_address
;
2210 Mips_output_data_la25_stub()
2211 : Output_section_data(size
== 32 ? 4 : 8), symbols_()
2214 // Create LA25 stub for a symbol.
2216 create_la25_stub(Symbol_table
* symtab
, Target_mips
<size
, big_endian
>* target
,
2217 Mips_symbol
<size
>* gsym
);
2219 // Return output address of a stub.
2221 stub_address(const Mips_symbol
<size
>* sym
) const
2223 gold_assert(sym
->has_la25_stub());
2224 return this->address() + sym
->la25_stub_offset();
2229 do_adjust_output_section(Output_section
* os
)
2230 { os
->set_entsize(0); }
2233 // Template for standard LA25 stub.
2234 static const uint32_t la25_stub_entry
[];
2235 // Template for microMIPS LA25 stub.
2236 static const uint32_t la25_stub_micromips_entry
[];
2238 // Set the final size.
2240 set_final_data_size()
2241 { this->set_data_size(this->symbols_
.size() * 16); }
2243 // Create a symbol for SYM stub's value and size, to help make the
2244 // disassembly easier to read.
2246 create_stub_symbol(Mips_symbol
<size
>* sym
, Symbol_table
* symtab
,
2247 Target_mips
<size
, big_endian
>* target
, uint64_t symsize
);
2249 // Write out the LA25 stub section.
2251 do_write(Output_file
*);
2253 // Symbols that have LA25 stubs.
2254 Unordered_set
<Mips_symbol
<size
>*> symbols_
;
2257 // A class to handle the PLT data.
2259 template<int size
, bool big_endian
>
2260 class Mips_output_data_plt
: public Output_section_data
2262 typedef typename
elfcpp::Elf_types
<size
>::Elf_Addr Mips_address
;
2263 typedef Output_data_reloc
<elfcpp::SHT_REL
, true,
2264 size
, big_endian
> Reloc_section
;
2267 // Create the PLT section. The ordinary .got section is an argument,
2268 // since we need to refer to the start.
2269 Mips_output_data_plt(Layout
* layout
, Output_data_space
* got_plt
,
2270 Target_mips
<size
, big_endian
>* target
)
2271 : Output_section_data(size
== 32 ? 4 : 8), got_plt_(got_plt
), symbols_(),
2272 plt_mips_offset_(0), plt_comp_offset_(0), plt_header_size_(0),
2275 this->rel_
= new Reloc_section(false);
2276 layout
->add_output_section_data(".rel.plt", elfcpp::SHT_REL
,
2277 elfcpp::SHF_ALLOC
, this->rel_
,
2278 ORDER_DYNAMIC_PLT_RELOCS
, false);
2281 // Add an entry to the PLT for a symbol referenced by r_type relocation.
2283 add_entry(Mips_symbol
<size
>* gsym
, unsigned int r_type
);
2285 // Return the .rel.plt section data.
2286 const Reloc_section
*
2288 { return this->rel_
; }
2290 // Return the number of PLT entries.
2293 { return this->symbols_
.size(); }
2295 // Return the offset of the first non-reserved PLT entry.
2297 first_plt_entry_offset() const
2298 { return sizeof(plt0_entry_o32
); }
2300 // Return the size of a PLT entry.
2302 plt_entry_size() const
2303 { return sizeof(plt_entry
); }
2305 // Set final PLT offsets. For each symbol, determine whether standard or
2306 // compressed (MIPS16 or microMIPS) PLT entry is used.
2310 // Return the offset of the first standard PLT entry.
2312 first_mips_plt_offset() const
2313 { return this->plt_header_size_
; }
2315 // Return the offset of the first compressed PLT entry.
2317 first_comp_plt_offset() const
2318 { return this->plt_header_size_
+ this->plt_mips_offset_
; }
2320 // Return whether there are any standard PLT entries.
2322 has_standard_entries() const
2323 { return this->plt_mips_offset_
> 0; }
2325 // Return the output address of standard PLT entry.
2327 mips_entry_address(const Mips_symbol
<size
>* sym
) const
2329 gold_assert (sym
->has_mips_plt_offset());
2330 return (this->address() + this->first_mips_plt_offset()
2331 + sym
->mips_plt_offset());
2334 // Return the output address of compressed (MIPS16 or microMIPS) PLT entry.
2336 comp_entry_address(const Mips_symbol
<size
>* sym
) const
2338 gold_assert (sym
->has_comp_plt_offset());
2339 return (this->address() + this->first_comp_plt_offset()
2340 + sym
->comp_plt_offset());
2345 do_adjust_output_section(Output_section
* os
)
2346 { os
->set_entsize(0); }
2348 // Write to a map file.
2350 do_print_to_mapfile(Mapfile
* mapfile
) const
2351 { mapfile
->print_output_data(this, _(".plt")); }
2354 // Template for the first PLT entry.
2355 static const uint32_t plt0_entry_o32
[];
2356 static const uint32_t plt0_entry_n32
[];
2357 static const uint32_t plt0_entry_n64
[];
2358 static const uint32_t plt0_entry_micromips_o32
[];
2359 static const uint32_t plt0_entry_micromips32_o32
[];
2361 // Template for subsequent PLT entries.
2362 static const uint32_t plt_entry
[];
2363 static const uint32_t plt_entry_mips16_o32
[];
2364 static const uint32_t plt_entry_micromips_o32
[];
2365 static const uint32_t plt_entry_micromips32_o32
[];
2367 // Set the final size.
2369 set_final_data_size()
2371 this->set_data_size(this->plt_header_size_
+ this->plt_mips_offset_
2372 + this->plt_comp_offset_
);
2375 // Write out the PLT data.
2377 do_write(Output_file
*);
2379 // Return whether the plt header contains microMIPS code. For the sake of
2380 // cache alignment always use a standard header whenever any standard entries
2381 // are present even if microMIPS entries are present as well. This also lets
2382 // the microMIPS header rely on the value of $v0 only set by microMIPS
2383 // entries, for a small size reduction.
2385 is_plt_header_compressed() const
2387 gold_assert(this->plt_mips_offset_
+ this->plt_comp_offset_
!= 0);
2388 return this->target_
->is_output_micromips() && this->plt_mips_offset_
== 0;
2391 // Return the size of the PLT header.
2393 get_plt_header_size() const
2395 if (this->target_
->is_output_n64())
2396 return 4 * sizeof(plt0_entry_n64
) / sizeof(plt0_entry_n64
[0]);
2397 else if (this->target_
->is_output_n32())
2398 return 4 * sizeof(plt0_entry_n32
) / sizeof(plt0_entry_n32
[0]);
2399 else if (!this->is_plt_header_compressed())
2400 return 4 * sizeof(plt0_entry_o32
) / sizeof(plt0_entry_o32
[0]);
2401 else if (this->target_
->use_32bit_micromips_instructions())
2402 return (2 * sizeof(plt0_entry_micromips32_o32
)
2403 / sizeof(plt0_entry_micromips32_o32
[0]));
2405 return (2 * sizeof(plt0_entry_micromips_o32
)
2406 / sizeof(plt0_entry_micromips_o32
[0]));
2409 // Return the PLT header entry.
2411 get_plt_header_entry() const
2413 if (this->target_
->is_output_n64())
2414 return plt0_entry_n64
;
2415 else if (this->target_
->is_output_n32())
2416 return plt0_entry_n32
;
2417 else if (!this->is_plt_header_compressed())
2418 return plt0_entry_o32
;
2419 else if (this->target_
->use_32bit_micromips_instructions())
2420 return plt0_entry_micromips32_o32
;
2422 return plt0_entry_micromips_o32
;
2425 // Return the size of the standard PLT entry.
2427 standard_plt_entry_size() const
2428 { return 4 * sizeof(plt_entry
) / sizeof(plt_entry
[0]); }
2430 // Return the size of the compressed PLT entry.
2432 compressed_plt_entry_size() const
2434 gold_assert(!this->target_
->is_output_newabi());
2436 if (!this->target_
->is_output_micromips())
2437 return (2 * sizeof(plt_entry_mips16_o32
)
2438 / sizeof(plt_entry_mips16_o32
[0]));
2439 else if (this->target_
->use_32bit_micromips_instructions())
2440 return (2 * sizeof(plt_entry_micromips32_o32
)
2441 / sizeof(plt_entry_micromips32_o32
[0]));
2443 return (2 * sizeof(plt_entry_micromips_o32
)
2444 / sizeof(plt_entry_micromips_o32
[0]));
2447 // The reloc section.
2448 Reloc_section
* rel_
;
2449 // The .got.plt section.
2450 Output_data_space
* got_plt_
;
2451 // Symbols that have PLT entry.
2452 std::vector
<Mips_symbol
<size
>*> symbols_
;
2453 // The offset of the next standard PLT entry to create.
2454 unsigned int plt_mips_offset_
;
2455 // The offset of the next compressed PLT entry to create.
2456 unsigned int plt_comp_offset_
;
2457 // The size of the PLT header in bytes.
2458 unsigned int plt_header_size_
;
2460 Target_mips
<size
, big_endian
>* target_
;
2463 // A class to handle the .MIPS.stubs data.
2465 template<int size
, bool big_endian
>
2466 class Mips_output_data_mips_stubs
: public Output_section_data
2468 typedef typename
elfcpp::Elf_types
<size
>::Elf_Addr Mips_address
;
2471 Mips_output_data_mips_stubs(Target_mips
<size
, big_endian
>* target
)
2472 : Output_section_data(size
== 32 ? 4 : 8), symbols_(), dynsym_count_(-1U),
2473 stub_offsets_are_set_(false), target_(target
)
2476 // Create entry for a symbol.
2478 make_entry(Mips_symbol
<size
>*);
2480 // Remove entry for a symbol.
2482 remove_entry(Mips_symbol
<size
>* gsym
);
2484 // Set stub offsets for symbols. This method expects that the number of
2485 // entries in dynamic symbol table is set.
2487 set_lazy_stub_offsets();
2490 set_needs_dynsym_value();
2492 // Set the number of entries in dynamic symbol table.
2494 set_dynsym_count(unsigned int dynsym_count
)
2495 { this->dynsym_count_
= dynsym_count
; }
2497 // Return maximum size of the stub, ie. the stub size if the dynamic symbol
2498 // count is greater than 0x10000. If the dynamic symbol count is less than
2499 // 0x10000, the stub will be 4 bytes smaller.
2500 // There's no disadvantage from using microMIPS code here, so for the sake of
2501 // pure-microMIPS binaries we prefer it whenever there's any microMIPS code in
2502 // output produced at all. This has a benefit of stubs being shorter by
2503 // 4 bytes each too, unless in the insn32 mode.
2505 stub_max_size() const
2507 if (!this->target_
->is_output_micromips()
2508 || this->target_
->use_32bit_micromips_instructions())
2514 // Return the size of the stub. This method expects that the final dynsym
2519 gold_assert(this->dynsym_count_
!= -1U);
2520 if (this->dynsym_count_
> 0x10000)
2521 return this->stub_max_size();
2523 return this->stub_max_size() - 4;
2526 // Return output address of a stub.
2528 stub_address(const Mips_symbol
<size
>* sym
) const
2530 gold_assert(sym
->has_lazy_stub());
2531 return this->address() + sym
->lazy_stub_offset();
2536 do_adjust_output_section(Output_section
* os
)
2537 { os
->set_entsize(0); }
2539 // Write to a map file.
2541 do_print_to_mapfile(Mapfile
* mapfile
) const
2542 { mapfile
->print_output_data(this, _(".MIPS.stubs")); }
2545 static const uint32_t lazy_stub_normal_1
[];
2546 static const uint32_t lazy_stub_normal_1_n64
[];
2547 static const uint32_t lazy_stub_normal_2
[];
2548 static const uint32_t lazy_stub_normal_2_n64
[];
2549 static const uint32_t lazy_stub_big
[];
2550 static const uint32_t lazy_stub_big_n64
[];
2552 static const uint32_t lazy_stub_micromips_normal_1
[];
2553 static const uint32_t lazy_stub_micromips_normal_1_n64
[];
2554 static const uint32_t lazy_stub_micromips_normal_2
[];
2555 static const uint32_t lazy_stub_micromips_normal_2_n64
[];
2556 static const uint32_t lazy_stub_micromips_big
[];
2557 static const uint32_t lazy_stub_micromips_big_n64
[];
2559 static const uint32_t lazy_stub_micromips32_normal_1
[];
2560 static const uint32_t lazy_stub_micromips32_normal_1_n64
[];
2561 static const uint32_t lazy_stub_micromips32_normal_2
[];
2562 static const uint32_t lazy_stub_micromips32_normal_2_n64
[];
2563 static const uint32_t lazy_stub_micromips32_big
[];
2564 static const uint32_t lazy_stub_micromips32_big_n64
[];
2566 // Set the final size.
2568 set_final_data_size()
2569 { this->set_data_size(this->symbols_
.size() * this->stub_max_size()); }
2571 // Write out the .MIPS.stubs data.
2573 do_write(Output_file
*);
2575 // .MIPS.stubs symbols
2576 Unordered_set
<Mips_symbol
<size
>*> symbols_
;
2577 // Number of entries in dynamic symbol table.
2578 unsigned int dynsym_count_
;
2579 // Whether the stub offsets are set.
2580 bool stub_offsets_are_set_
;
2582 Target_mips
<size
, big_endian
>* target_
;
2585 // This class handles Mips .reginfo output section.
2587 template<int size
, bool big_endian
>
2588 class Mips_output_section_reginfo
: public Output_section
2590 typedef typename
elfcpp::Swap
<size
, big_endian
>::Valtype Valtype
;
2593 Mips_output_section_reginfo(const char* name
, elfcpp::Elf_Word type
,
2594 elfcpp::Elf_Xword flags
,
2595 Target_mips
<size
, big_endian
>* target
)
2596 : Output_section(name
, type
, flags
), target_(target
), gprmask_(0),
2597 cprmask1_(0), cprmask2_(0), cprmask3_(0), cprmask4_(0)
2600 // Downcast a base pointer to a Mips_output_section_reginfo pointer.
2601 static Mips_output_section_reginfo
<size
, big_endian
>*
2602 as_mips_output_section_reginfo(Output_section
* os
)
2603 { return static_cast<Mips_output_section_reginfo
<size
, big_endian
>*>(os
); }
2605 // Set masks of the output .reginfo section.
2607 set_masks(Valtype gprmask
, Valtype cprmask1
, Valtype cprmask2
,
2608 Valtype cprmask3
, Valtype cprmask4
)
2610 this->gprmask_
= gprmask
;
2611 this->cprmask1_
= cprmask1
;
2612 this->cprmask2_
= cprmask2
;
2613 this->cprmask3_
= cprmask3
;
2614 this->cprmask4_
= cprmask4
;
2618 // Set the final data size.
2620 set_final_data_size()
2621 { this->set_data_size(24); }
2623 // Write out reginfo section.
2625 do_write(Output_file
* of
);
2628 Target_mips
<size
, big_endian
>* target_
;
2630 // gprmask of the output .reginfo section.
2632 // cprmask1 of the output .reginfo section.
2634 // cprmask2 of the output .reginfo section.
2636 // cprmask3 of the output .reginfo section.
2638 // cprmask4 of the output .reginfo section.
2642 // The MIPS target has relocation types which default handling of relocatable
2643 // relocation cannot process. So we have to extend the default code.
2645 template<bool big_endian
, typename Classify_reloc
>
2646 class Mips_scan_relocatable_relocs
:
2647 public Default_scan_relocatable_relocs
<Classify_reloc
>
2650 // Return the strategy to use for a local symbol which is a section
2651 // symbol, given the relocation type.
2652 inline Relocatable_relocs::Reloc_strategy
2653 local_section_strategy(unsigned int r_type
, Relobj
* object
)
2655 if (Classify_reloc::sh_type
== elfcpp::SHT_RELA
)
2656 return Relocatable_relocs::RELOC_ADJUST_FOR_SECTION_RELA
;
2661 case elfcpp::R_MIPS_26
:
2662 return Relocatable_relocs::RELOC_SPECIAL
;
2665 return Default_scan_relocatable_relocs
<Classify_reloc
>::
2666 local_section_strategy(r_type
, object
);
2672 // Mips_copy_relocs class. The only difference from the base class is the
2673 // method emit_mips, which should be called instead of Copy_reloc_entry::emit.
2674 // Mips cannot convert all relocation types to dynamic relocs. If a reloc
2675 // cannot be made dynamic, a COPY reloc is emitted.
2677 template<int sh_type
, int size
, bool big_endian
>
2678 class Mips_copy_relocs
: public Copy_relocs
<sh_type
, size
, big_endian
>
2682 : Copy_relocs
<sh_type
, size
, big_endian
>(elfcpp::R_MIPS_COPY
)
2685 // Emit any saved relocations which turn out to be needed. This is
2686 // called after all the relocs have been scanned.
2688 emit_mips(Output_data_reloc
<sh_type
, true, size
, big_endian
>*,
2689 Symbol_table
*, Layout
*, Target_mips
<size
, big_endian
>*);
2692 typedef typename Copy_relocs
<sh_type
, size
, big_endian
>::Copy_reloc_entry
2695 // Emit this reloc if appropriate. This is called after we have
2696 // scanned all the relocations, so we know whether we emitted a
2697 // COPY relocation for SYM_.
2699 emit_entry(Copy_reloc_entry
& entry
,
2700 Output_data_reloc
<sh_type
, true, size
, big_endian
>* reloc_section
,
2701 Symbol_table
* symtab
, Layout
* layout
,
2702 Target_mips
<size
, big_endian
>* target
);
2706 // Return true if the symbol SYM should be considered to resolve local
2707 // to the current module, and false otherwise. The logic is taken from
2708 // GNU ld's method _bfd_elf_symbol_refs_local_p.
2710 symbol_refs_local(const Symbol
* sym
, bool has_dynsym_entry
,
2711 bool local_protected
)
2713 // If it's a local sym, of course we resolve locally.
2717 // STV_HIDDEN or STV_INTERNAL ones must be local.
2718 if (sym
->visibility() == elfcpp::STV_HIDDEN
2719 || sym
->visibility() == elfcpp::STV_INTERNAL
)
2722 // If we don't have a definition in a regular file, then we can't
2723 // resolve locally. The sym is either undefined or dynamic.
2724 if (sym
->source() != Symbol::FROM_OBJECT
|| sym
->object()->is_dynamic()
2725 || sym
->is_undefined())
2728 // Forced local symbols resolve locally.
2729 if (sym
->is_forced_local())
2732 // As do non-dynamic symbols.
2733 if (!has_dynsym_entry
)
2736 // At this point, we know the symbol is defined and dynamic. In an
2737 // executable it must resolve locally, likewise when building symbolic
2738 // shared libraries.
2739 if (parameters
->options().output_is_executable()
2740 || parameters
->options().Bsymbolic())
2743 // Now deal with defined dynamic symbols in shared libraries. Ones
2744 // with default visibility might not resolve locally.
2745 if (sym
->visibility() == elfcpp::STV_DEFAULT
)
2748 // STV_PROTECTED non-function symbols are local.
2749 if (sym
->type() != elfcpp::STT_FUNC
)
2752 // Function pointer equality tests may require that STV_PROTECTED
2753 // symbols be treated as dynamic symbols. If the address of a
2754 // function not defined in an executable is set to that function's
2755 // plt entry in the executable, then the address of the function in
2756 // a shared library must also be the plt entry in the executable.
2757 return local_protected
;
2760 // Return TRUE if references to this symbol always reference the symbol in this
2763 symbol_references_local(const Symbol
* sym
, bool has_dynsym_entry
)
2765 return symbol_refs_local(sym
, has_dynsym_entry
, false);
2768 // Return TRUE if calls to this symbol always call the version in this object.
2770 symbol_calls_local(const Symbol
* sym
, bool has_dynsym_entry
)
2772 return symbol_refs_local(sym
, has_dynsym_entry
, true);
2775 // Compare GOT offsets of two symbols.
2777 template<int size
, bool big_endian
>
2779 got_offset_compare(Symbol
* sym1
, Symbol
* sym2
)
2781 Mips_symbol
<size
>* mips_sym1
= Mips_symbol
<size
>::as_mips_sym(sym1
);
2782 Mips_symbol
<size
>* mips_sym2
= Mips_symbol
<size
>::as_mips_sym(sym2
);
2783 unsigned int area1
= mips_sym1
->global_got_area();
2784 unsigned int area2
= mips_sym2
->global_got_area();
2785 gold_assert(area1
!= GGA_NONE
&& area1
!= GGA_NONE
);
2787 // GGA_NORMAL entries always come before GGA_RELOC_ONLY.
2789 return area1
< area2
;
2791 return mips_sym1
->global_gotoffset() < mips_sym2
->global_gotoffset();
2794 // This method divides dynamic symbols into symbols that have GOT entry, and
2795 // symbols that don't have GOT entry. It also sorts symbols with the GOT entry.
2796 // Mips ABI requires that symbols with the GOT entry must be at the end of
2797 // dynamic symbol table, and the order in dynamic symbol table must match the
2800 template<int size
, bool big_endian
>
2802 reorder_dyn_symbols(std::vector
<Symbol
*>* dyn_symbols
,
2803 std::vector
<Symbol
*>* non_got_symbols
,
2804 std::vector
<Symbol
*>* got_symbols
)
2806 for (std::vector
<Symbol
*>::iterator p
= dyn_symbols
->begin();
2807 p
!= dyn_symbols
->end();
2810 Mips_symbol
<size
>* mips_sym
= Mips_symbol
<size
>::as_mips_sym(*p
);
2811 if (mips_sym
->global_got_area() == GGA_NORMAL
2812 || mips_sym
->global_got_area() == GGA_RELOC_ONLY
)
2813 got_symbols
->push_back(mips_sym
);
2815 non_got_symbols
->push_back(mips_sym
);
2818 std::sort(got_symbols
->begin(), got_symbols
->end(),
2819 got_offset_compare
<size
, big_endian
>);
2822 // Functor class for processing the global symbol table.
2824 template<int size
, bool big_endian
>
2825 class Symbol_visitor_check_symbols
2828 Symbol_visitor_check_symbols(Target_mips
<size
, big_endian
>* target
,
2829 Layout
* layout
, Symbol_table
* symtab
)
2830 : target_(target
), layout_(layout
), symtab_(symtab
)
2834 operator()(Sized_symbol
<size
>* sym
)
2836 Mips_symbol
<size
>* mips_sym
= Mips_symbol
<size
>::as_mips_sym(sym
);
2837 if (local_pic_function
<size
, big_endian
>(mips_sym
))
2839 // SYM is a function that might need $25 to be valid on entry.
2840 // If we're creating a non-PIC relocatable object, mark SYM as
2841 // being PIC. If we're creating a non-relocatable object with
2842 // non-PIC branches and jumps to SYM, make sure that SYM has an la25
2844 if (parameters
->options().relocatable())
2846 if (!parameters
->options().output_is_position_independent())
2847 mips_sym
->set_pic();
2849 else if (mips_sym
->has_nonpic_branches())
2851 this->target_
->la25_stub_section(layout_
)
2852 ->create_la25_stub(this->symtab_
, this->target_
, mips_sym
);
2858 Target_mips
<size
, big_endian
>* target_
;
2860 Symbol_table
* symtab_
;
2863 // Relocation types, parameterized by SHT_REL vs. SHT_RELA, size,
2864 // and endianness. The relocation format for MIPS-64 is non-standard.
2866 template<int sh_type
, int size
, bool big_endian
>
2867 struct Mips_reloc_types
;
2869 template<bool big_endian
>
2870 struct Mips_reloc_types
<elfcpp::SHT_REL
, 32, big_endian
>
2872 typedef typename
elfcpp::Rel
<32, big_endian
> Reloc
;
2873 typedef typename
elfcpp::Rel_write
<32, big_endian
> Reloc_write
;
2875 static unsigned typename
elfcpp::Elf_types
<32>::Elf_Swxword
2876 get_r_addend(const Reloc
*)
2880 set_reloc_addend(Reloc_write
*,
2881 typename
elfcpp::Elf_types
<32>::Elf_Swxword
)
2882 { gold_unreachable(); }
2885 template<bool big_endian
>
2886 struct Mips_reloc_types
<elfcpp::SHT_RELA
, 32, big_endian
>
2888 typedef typename
elfcpp::Rela
<32, big_endian
> Reloc
;
2889 typedef typename
elfcpp::Rela_write
<32, big_endian
> Reloc_write
;
2891 static unsigned typename
elfcpp::Elf_types
<32>::Elf_Swxword
2892 get_r_addend(const Reloc
* reloc
)
2893 { return reloc
->get_r_addend(); }
2896 set_reloc_addend(Reloc_write
* p
,
2897 typename
elfcpp::Elf_types
<32>::Elf_Swxword val
)
2898 { p
->put_r_addend(val
); }
2901 template<bool big_endian
>
2902 struct Mips_reloc_types
<elfcpp::SHT_REL
, 64, big_endian
>
2904 typedef typename
elfcpp::Mips64_rel
<big_endian
> Reloc
;
2905 typedef typename
elfcpp::Mips64_rel_write
<big_endian
> Reloc_write
;
2907 static unsigned typename
elfcpp::Elf_types
<64>::Elf_Swxword
2908 get_r_addend(const Reloc
*)
2912 set_reloc_addend(Reloc_write
*,
2913 typename
elfcpp::Elf_types
<64>::Elf_Swxword
)
2914 { gold_unreachable(); }
2917 template<bool big_endian
>
2918 struct Mips_reloc_types
<elfcpp::SHT_RELA
, 64, big_endian
>
2920 typedef typename
elfcpp::Mips64_rela
<big_endian
> Reloc
;
2921 typedef typename
elfcpp::Mips64_rela_write
<big_endian
> Reloc_write
;
2923 static unsigned typename
elfcpp::Elf_types
<64>::Elf_Swxword
2924 get_r_addend(const Reloc
* reloc
)
2925 { return reloc
->get_r_addend(); }
2928 set_reloc_addend(Reloc_write
* p
,
2929 typename
elfcpp::Elf_types
<64>::Elf_Swxword val
)
2930 { p
->put_r_addend(val
); }
2933 // Forward declaration.
2935 mips_get_size_for_reloc(unsigned int, Relobj
*);
2937 // A class for inquiring about properties of a relocation,
2938 // used while scanning relocs during a relocatable link and
2939 // garbage collection.
2941 template<int sh_type_
, int size
, bool big_endian
>
2942 class Mips_classify_reloc
;
2944 template<int sh_type_
, bool big_endian
>
2945 class Mips_classify_reloc
<sh_type_
, 32, big_endian
> :
2946 public gold::Default_classify_reloc
<sh_type_
, 32, big_endian
>
2949 typedef typename Mips_reloc_types
<sh_type_
, 32, big_endian
>::Reloc
2951 typedef typename Mips_reloc_types
<sh_type_
, 32, big_endian
>::Reloc_write
2954 // Return the symbol referred to by the relocation.
2955 static inline unsigned int
2956 get_r_sym(const Reltype
* reloc
)
2957 { return elfcpp::elf_r_sym
<32>(reloc
->get_r_info()); }
2959 // Return the type of the relocation.
2960 static inline unsigned int
2961 get_r_type(const Reltype
* reloc
)
2962 { return elfcpp::elf_r_type
<32>(reloc
->get_r_info()); }
2964 // Return the explicit addend of the relocation (return 0 for SHT_REL).
2965 static inline unsigned int
2966 get_r_addend(const Reltype
* reloc
)
2967 { return Mips_reloc_types
<sh_type_
, 32, big_endian
>::get_r_addend(reloc
); }
2969 // Write the r_info field to a new reloc, using the r_info field from
2970 // the original reloc, replacing the r_sym field with R_SYM.
2972 put_r_info(Reltype_write
* new_reloc
, Reltype
* reloc
, unsigned int r_sym
)
2974 unsigned int r_type
= elfcpp::elf_r_type
<32>(reloc
->get_r_info());
2975 new_reloc
->put_r_info(elfcpp::elf_r_info
<64>(r_sym
, r_type
));
2978 // Write the r_addend field to a new reloc.
2980 put_r_addend(Reltype_write
* to
,
2981 typename
elfcpp::Elf_types
<32>::Elf_Swxword addend
)
2982 { Mips_reloc_types
<sh_type_
, 32, big_endian
>::set_reloc_addend(to
, addend
); }
2984 // Return the size of the addend of the relocation (only used for SHT_REL).
2986 get_size_for_reloc(unsigned int r_type
, Relobj
* obj
)
2987 { return mips_get_size_for_reloc(r_type
, obj
); }
2990 template<int sh_type_
, bool big_endian
>
2991 class Mips_classify_reloc
<sh_type_
, 64, big_endian
> :
2992 public gold::Default_classify_reloc
<sh_type_
, 64, big_endian
>
2995 typedef typename Mips_reloc_types
<sh_type_
, 64, big_endian
>::Reloc
2997 typedef typename Mips_reloc_types
<sh_type_
, 64, big_endian
>::Reloc_write
3000 // Return the symbol referred to by the relocation.
3001 static inline unsigned int
3002 get_r_sym(const Reltype
* reloc
)
3003 { return reloc
->get_r_sym(); }
3005 // Return the type of the relocation.
3006 static inline unsigned int
3007 get_r_type(const Reltype
* reloc
)
3008 { return reloc
->get_r_type(); }
3010 // Return the explicit addend of the relocation (return 0 for SHT_REL).
3011 static inline typename
elfcpp::Elf_types
<64>::Elf_Swxword
3012 get_r_addend(const Reltype
* reloc
)
3013 { return Mips_reloc_types
<sh_type_
, 64, big_endian
>::get_r_addend(reloc
); }
3015 // Write the r_info field to a new reloc, using the r_info field from
3016 // the original reloc, replacing the r_sym field with R_SYM.
3018 put_r_info(Reltype_write
* new_reloc
, Reltype
* reloc
, unsigned int r_sym
)
3020 new_reloc
->put_r_sym(r_sym
);
3021 new_reloc
->put_r_ssym(reloc
->get_r_ssym());
3022 new_reloc
->put_r_type3(reloc
->get_r_type3());
3023 new_reloc
->put_r_type2(reloc
->get_r_type2());
3024 new_reloc
->put_r_type(reloc
->get_r_type());
3027 // Write the r_addend field to a new reloc.
3029 put_r_addend(Reltype_write
* to
,
3030 typename
elfcpp::Elf_types
<64>::Elf_Swxword addend
)
3031 { Mips_reloc_types
<sh_type_
, 64, big_endian
>::set_reloc_addend(to
, addend
); }
3033 // Return the size of the addend of the relocation (only used for SHT_REL).
3035 get_size_for_reloc(unsigned int r_type
, Relobj
* obj
)
3036 { return mips_get_size_for_reloc(r_type
, obj
); }
3039 template<int size
, bool big_endian
>
3040 class Target_mips
: public Sized_target
<size
, big_endian
>
3042 typedef typename
elfcpp::Elf_types
<size
>::Elf_Addr Mips_address
;
3043 typedef Output_data_reloc
<elfcpp::SHT_REL
, true, size
, big_endian
>
3045 typedef Output_data_reloc
<elfcpp::SHT_RELA
, true, size
, big_endian
>
3047 typedef typename
elfcpp::Swap
<32, big_endian
>::Valtype Valtype32
;
3048 typedef typename
elfcpp::Swap
<size
, big_endian
>::Valtype Valtype
;
3049 typedef typename Mips_reloc_types
<elfcpp::SHT_REL
, size
, big_endian
>::Reloc
3051 typedef typename Mips_reloc_types
<elfcpp::SHT_RELA
, size
, big_endian
>::Reloc
3055 Target_mips(const Target::Target_info
* info
= &mips_info
)
3056 : Sized_target
<size
, big_endian
>(info
), got_(NULL
), gp_(NULL
), plt_(NULL
),
3057 got_plt_(NULL
), rel_dyn_(NULL
), copy_relocs_(),
3058 dyn_relocs_(), la25_stub_(NULL
), mips_mach_extensions_(),
3059 mips_stubs_(NULL
), ei_class_(0), mach_(0), layout_(NULL
),
3060 got16_addends_(), entry_symbol_is_compressed_(false), insn32_(false)
3062 this->add_machine_extensions();
3065 // The offset of $gp from the beginning of the .got section.
3066 static const unsigned int MIPS_GP_OFFSET
= 0x7ff0;
3068 // The maximum size of the GOT for it to be addressable using 16-bit
3069 // offsets from $gp.
3070 static const unsigned int MIPS_GOT_MAX_SIZE
= MIPS_GP_OFFSET
+ 0x7fff;
3072 // Make a new symbol table entry for the Mips target.
3075 { return new Mips_symbol
<size
>(); }
3077 // Process the relocations to determine unreferenced sections for
3078 // garbage collection.
3080 gc_process_relocs(Symbol_table
* symtab
,
3082 Sized_relobj_file
<size
, big_endian
>* object
,
3083 unsigned int data_shndx
,
3084 unsigned int sh_type
,
3085 const unsigned char* prelocs
,
3087 Output_section
* output_section
,
3088 bool needs_special_offset_handling
,
3089 size_t local_symbol_count
,
3090 const unsigned char* plocal_symbols
);
3092 // Scan the relocations to look for symbol adjustments.
3094 scan_relocs(Symbol_table
* symtab
,
3096 Sized_relobj_file
<size
, big_endian
>* object
,
3097 unsigned int data_shndx
,
3098 unsigned int sh_type
,
3099 const unsigned char* prelocs
,
3101 Output_section
* output_section
,
3102 bool needs_special_offset_handling
,
3103 size_t local_symbol_count
,
3104 const unsigned char* plocal_symbols
);
3106 // Finalize the sections.
3108 do_finalize_sections(Layout
*, const Input_objects
*, Symbol_table
*);
3110 // Relocate a section.
3112 relocate_section(const Relocate_info
<size
, big_endian
>*,
3113 unsigned int sh_type
,
3114 const unsigned char* prelocs
,
3116 Output_section
* output_section
,
3117 bool needs_special_offset_handling
,
3118 unsigned char* view
,
3119 Mips_address view_address
,
3120 section_size_type view_size
,
3121 const Reloc_symbol_changes
*);
3123 // Scan the relocs during a relocatable link.
3125 scan_relocatable_relocs(Symbol_table
* symtab
,
3127 Sized_relobj_file
<size
, big_endian
>* object
,
3128 unsigned int data_shndx
,
3129 unsigned int sh_type
,
3130 const unsigned char* prelocs
,
3132 Output_section
* output_section
,
3133 bool needs_special_offset_handling
,
3134 size_t local_symbol_count
,
3135 const unsigned char* plocal_symbols
,
3136 Relocatable_relocs
*);
3138 // Scan the relocs for --emit-relocs.
3140 emit_relocs_scan(Symbol_table
* symtab
,
3142 Sized_relobj_file
<size
, big_endian
>* object
,
3143 unsigned int data_shndx
,
3144 unsigned int sh_type
,
3145 const unsigned char* prelocs
,
3147 Output_section
* output_section
,
3148 bool needs_special_offset_handling
,
3149 size_t local_symbol_count
,
3150 const unsigned char* plocal_syms
,
3151 Relocatable_relocs
* rr
);
3153 // Emit relocations for a section.
3155 relocate_relocs(const Relocate_info
<size
, big_endian
>*,
3156 unsigned int sh_type
,
3157 const unsigned char* prelocs
,
3159 Output_section
* output_section
,
3160 typename
elfcpp::Elf_types
<size
>::Elf_Off
3161 offset_in_output_section
,
3162 unsigned char* view
,
3163 Mips_address view_address
,
3164 section_size_type view_size
,
3165 unsigned char* reloc_view
,
3166 section_size_type reloc_view_size
);
3168 // Perform target-specific processing in a relocatable link. This is
3169 // only used if we use the relocation strategy RELOC_SPECIAL.
3171 relocate_special_relocatable(const Relocate_info
<size
, big_endian
>* relinfo
,
3172 unsigned int sh_type
,
3173 const unsigned char* preloc_in
,
3175 Output_section
* output_section
,
3176 typename
elfcpp::Elf_types
<size
>::Elf_Off
3177 offset_in_output_section
,
3178 unsigned char* view
,
3179 Mips_address view_address
,
3180 section_size_type view_size
,
3181 unsigned char* preloc_out
);
3183 // Return whether SYM is defined by the ABI.
3185 do_is_defined_by_abi(const Symbol
* sym
) const
3187 return ((strcmp(sym
->name(), "__gnu_local_gp") == 0)
3188 || (strcmp(sym
->name(), "_gp_disp") == 0)
3189 || (strcmp(sym
->name(), "___tls_get_addr") == 0));
3192 // Return the number of entries in the GOT.
3194 got_entry_count() const
3196 if (!this->has_got_section())
3198 return this->got_size() / (size
/8);
3201 // Return the number of entries in the PLT.
3203 plt_entry_count() const
3205 if (this->plt_
== NULL
)
3207 return this->plt_
->entry_count();
3210 // Return the offset of the first non-reserved PLT entry.
3212 first_plt_entry_offset() const
3213 { return this->plt_
->first_plt_entry_offset(); }
3215 // Return the size of each PLT entry.
3217 plt_entry_size() const
3218 { return this->plt_
->plt_entry_size(); }
3220 // Get the GOT section, creating it if necessary.
3221 Mips_output_data_got
<size
, big_endian
>*
3222 got_section(Symbol_table
*, Layout
*);
3224 // Get the GOT section.
3225 Mips_output_data_got
<size
, big_endian
>*
3228 gold_assert(this->got_
!= NULL
);
3232 // Get the .MIPS.stubs section, creating it if necessary.
3233 Mips_output_data_mips_stubs
<size
, big_endian
>*
3234 mips_stubs_section(Layout
* layout
);
3236 // Get the .MIPS.stubs section.
3237 Mips_output_data_mips_stubs
<size
, big_endian
>*
3238 mips_stubs_section() const
3240 gold_assert(this->mips_stubs_
!= NULL
);
3241 return this->mips_stubs_
;
3244 // Get the LA25 stub section, creating it if necessary.
3245 Mips_output_data_la25_stub
<size
, big_endian
>*
3246 la25_stub_section(Layout
*);
3248 // Get the LA25 stub section.
3249 Mips_output_data_la25_stub
<size
, big_endian
>*
3252 gold_assert(this->la25_stub_
!= NULL
);
3253 return this->la25_stub_
;
3256 // Get gp value. It has the value of .got + 0x7FF0.
3260 if (this->gp_
!= NULL
)
3261 return this->gp_
->value();
3265 // Get gp value. It has the value of .got + 0x7FF0. Adjust it for
3266 // multi-GOT links so that OBJECT's GOT + 0x7FF0 is returned.
3268 adjusted_gp_value(const Mips_relobj
<size
, big_endian
>* object
)
3270 if (this->gp_
== NULL
)
3273 bool multi_got
= false;
3274 if (this->has_got_section())
3275 multi_got
= this->got_section()->multi_got();
3277 return this->gp_
->value();
3279 return this->gp_
->value() + this->got_section()->get_got_offset(object
);
3282 // Get the dynamic reloc section, creating it if necessary.
3284 rel_dyn_section(Layout
*);
3287 do_has_custom_set_dynsym_indexes() const
3290 // Don't emit input .reginfo sections to output .reginfo.
3292 do_should_include_section(elfcpp::Elf_Word sh_type
) const
3293 { return sh_type
!= elfcpp::SHT_MIPS_REGINFO
; }
3295 // Set the dynamic symbol indexes. INDEX is the index of the first
3296 // global dynamic symbol. Pointers to the symbols are stored into the
3297 // vector SYMS. The names are added to DYNPOOL. This returns an
3298 // updated dynamic symbol index.
3300 do_set_dynsym_indexes(std::vector
<Symbol
*>* dyn_symbols
, unsigned int index
,
3301 std::vector
<Symbol
*>* syms
, Stringpool
* dynpool
,
3302 Versions
* versions
, Symbol_table
* symtab
) const;
3304 // Remove .MIPS.stubs entry for a symbol.
3306 remove_lazy_stub_entry(Mips_symbol
<size
>* sym
)
3308 if (this->mips_stubs_
!= NULL
)
3309 this->mips_stubs_
->remove_entry(sym
);
3312 // The value to write into got[1] for SVR4 targets, to identify it is
3313 // a GNU object. The dynamic linker can then use got[1] to store the
3316 mips_elf_gnu_got1_mask()
3318 if (this->is_output_n64())
3319 return (uint64_t)1 << 63;
3324 // Whether the output has microMIPS code. This is valid only after
3325 // merge_processor_specific_flags() is called.
3327 is_output_micromips() const
3329 gold_assert(this->are_processor_specific_flags_set());
3330 return elfcpp::is_micromips(this->processor_specific_flags());
3333 // Whether the output uses N32 ABI. This is valid only after
3334 // merge_processor_specific_flags() is called.
3336 is_output_n32() const
3338 gold_assert(this->are_processor_specific_flags_set());
3339 return elfcpp::abi_n32(this->processor_specific_flags());
3342 // Whether the output uses N64 ABI. This is valid only after
3343 // merge_processor_specific_flags() is called.
3345 is_output_n64() const
3347 gold_assert(this->are_processor_specific_flags_set());
3348 return elfcpp::abi_64(this->ei_class_
);
3351 // Whether the output uses NEWABI. This is valid only after
3352 // merge_processor_specific_flags() is called.
3354 is_output_newabi() const
3355 { return this->is_output_n32() || this->is_output_n64(); }
3357 // Whether we can only use 32-bit microMIPS instructions.
3359 use_32bit_micromips_instructions() const
3360 { return this->insn32_
; }
3362 // Return the r_sym field from a relocation.
3364 get_r_sym(const unsigned char* preloc
) const
3366 // Since REL and RELA relocs share the same structure through
3367 // the r_info field, we can just use REL here.
3368 Reltype
rel(preloc
);
3369 return Mips_classify_reloc
<elfcpp::SHT_REL
, size
, big_endian
>::
3374 // Return the value to use for a dynamic symbol which requires special
3375 // treatment. This is how we support equality comparisons of function
3376 // pointers across shared library boundaries, as described in the
3377 // processor specific ABI supplement.
3379 do_dynsym_value(const Symbol
* gsym
) const;
3381 // Make an ELF object.
3383 do_make_elf_object(const std::string
&, Input_file
*, off_t
,
3384 const elfcpp::Ehdr
<size
, big_endian
>& ehdr
);
3387 do_make_elf_object(const std::string
&, Input_file
*, off_t
,
3388 const elfcpp::Ehdr
<size
, !big_endian
>&)
3389 { gold_unreachable(); }
3391 // Make an output section.
3393 do_make_output_section(const char* name
, elfcpp::Elf_Word type
,
3394 elfcpp::Elf_Xword flags
)
3396 if (type
== elfcpp::SHT_MIPS_REGINFO
)
3397 return new Mips_output_section_reginfo
<size
, big_endian
>(name
, type
,
3400 return new Output_section(name
, type
, flags
);
3403 // Adjust ELF file header.
3405 do_adjust_elf_header(unsigned char* view
, int len
);
3407 // Get the custom dynamic tag value.
3409 do_dynamic_tag_custom_value(elfcpp::DT
) const;
3411 // Adjust the value written to the dynamic symbol table.
3413 do_adjust_dyn_symbol(const Symbol
* sym
, unsigned char* view
) const
3415 elfcpp::Sym
<size
, big_endian
> isym(view
);
3416 elfcpp::Sym_write
<size
, big_endian
> osym(view
);
3417 const Mips_symbol
<size
>* mips_sym
= Mips_symbol
<size
>::as_mips_sym(sym
);
3419 // Keep dynamic compressed symbols odd. This allows the dynamic linker
3420 // to treat compressed symbols like any other.
3421 Mips_address value
= isym
.get_st_value();
3422 if (mips_sym
->is_mips16() && value
!= 0)
3424 if (!mips_sym
->has_mips16_fn_stub())
3428 // If we have a MIPS16 function with a stub, the dynamic symbol
3429 // must refer to the stub, since only the stub uses the standard
3430 // calling conventions. Stub contains MIPS32 code, so don't add +1
3433 // There is a code which does this in the method
3434 // Target_mips::do_dynsym_value, but that code will only be
3435 // executed if the symbol is from dynobj.
3436 // TODO(sasa): GNU ld also changes the value in non-dynamic symbol
3439 Mips16_stub_section
<size
, big_endian
>* fn_stub
=
3440 mips_sym
->template get_mips16_fn_stub
<big_endian
>();
3441 value
= fn_stub
->output_address();
3442 osym
.put_st_size(fn_stub
->section_size());
3445 osym
.put_st_value(value
);
3446 osym
.put_st_other(elfcpp::elf_st_other(sym
->visibility(),
3447 mips_sym
->nonvis() - (elfcpp::STO_MIPS16
>> 2)));
3449 else if ((mips_sym
->is_micromips()
3450 // Stubs are always microMIPS if there is any microMIPS code in
3452 || (this->is_output_micromips() && mips_sym
->has_lazy_stub()))
3455 osym
.put_st_value(value
| 1);
3456 osym
.put_st_other(elfcpp::elf_st_other(sym
->visibility(),
3457 mips_sym
->nonvis() - (elfcpp::STO_MICROMIPS
>> 2)));
3462 // The class which scans relocations.
3470 get_reference_flags(unsigned int r_type
);
3473 local(Symbol_table
* symtab
, Layout
* layout
, Target_mips
* target
,
3474 Sized_relobj_file
<size
, big_endian
>* object
,
3475 unsigned int data_shndx
,
3476 Output_section
* output_section
,
3477 const Reltype
& reloc
, unsigned int r_type
,
3478 const elfcpp::Sym
<size
, big_endian
>& lsym
,
3482 local(Symbol_table
* symtab
, Layout
* layout
, Target_mips
* target
,
3483 Sized_relobj_file
<size
, big_endian
>* object
,
3484 unsigned int data_shndx
,
3485 Output_section
* output_section
,
3486 const Relatype
& reloc
, unsigned int r_type
,
3487 const elfcpp::Sym
<size
, big_endian
>& lsym
,
3491 local(Symbol_table
* symtab
, Layout
* layout
, Target_mips
* target
,
3492 Sized_relobj_file
<size
, big_endian
>* object
,
3493 unsigned int data_shndx
,
3494 Output_section
* output_section
,
3495 const Relatype
* rela
,
3497 unsigned int rel_type
,
3498 unsigned int r_type
,
3499 const elfcpp::Sym
<size
, big_endian
>& lsym
,
3503 global(Symbol_table
* symtab
, Layout
* layout
, Target_mips
* target
,
3504 Sized_relobj_file
<size
, big_endian
>* object
,
3505 unsigned int data_shndx
,
3506 Output_section
* output_section
,
3507 const Reltype
& reloc
, unsigned int r_type
,
3511 global(Symbol_table
* symtab
, Layout
* layout
, Target_mips
* target
,
3512 Sized_relobj_file
<size
, big_endian
>* object
,
3513 unsigned int data_shndx
,
3514 Output_section
* output_section
,
3515 const Relatype
& reloc
, unsigned int r_type
,
3519 global(Symbol_table
* symtab
, Layout
* layout
, Target_mips
* target
,
3520 Sized_relobj_file
<size
, big_endian
>* object
,
3521 unsigned int data_shndx
,
3522 Output_section
* output_section
,
3523 const Relatype
* rela
,
3525 unsigned int rel_type
,
3526 unsigned int r_type
,
3530 local_reloc_may_be_function_pointer(Symbol_table
* , Layout
*,
3532 Sized_relobj_file
<size
, big_endian
>*,
3537 const elfcpp::Sym
<size
, big_endian
>&)
3541 global_reloc_may_be_function_pointer(Symbol_table
*, Layout
*,
3543 Sized_relobj_file
<size
, big_endian
>*,
3547 unsigned int, Symbol
*)
3551 local_reloc_may_be_function_pointer(Symbol_table
*, Layout
*,
3553 Sized_relobj_file
<size
, big_endian
>*,
3558 const elfcpp::Sym
<size
, big_endian
>&)
3562 global_reloc_may_be_function_pointer(Symbol_table
*, Layout
*,
3564 Sized_relobj_file
<size
, big_endian
>*,
3568 unsigned int, Symbol
*)
3572 unsupported_reloc_local(Sized_relobj_file
<size
, big_endian
>*,
3573 unsigned int r_type
);
3576 unsupported_reloc_global(Sized_relobj_file
<size
, big_endian
>*,
3577 unsigned int r_type
, Symbol
*);
3580 // The class which implements relocation.
3590 // Return whether the R_MIPS_32 relocation needs to be applied.
3592 should_apply_r_mips_32_reloc(const Mips_symbol
<size
>* gsym
,
3593 unsigned int r_type
,
3594 Output_section
* output_section
,
3595 Target_mips
* target
);
3597 // Do a relocation. Return false if the caller should not issue
3598 // any warnings about this relocation.
3600 relocate(const Relocate_info
<size
, big_endian
>*, unsigned int,
3601 Target_mips
*, Output_section
*, size_t, const unsigned char*,
3602 const Sized_symbol
<size
>*, const Symbol_value
<size
>*,
3603 unsigned char*, Mips_address
, section_size_type
);
3606 // This POD class holds the dynamic relocations that should be emitted instead
3607 // of R_MIPS_32, R_MIPS_REL32 and R_MIPS_64 relocations. We will emit these
3608 // relocations if it turns out that the symbol does not have static
3613 Dyn_reloc(Mips_symbol
<size
>* sym
, unsigned int r_type
,
3614 Mips_relobj
<size
, big_endian
>* relobj
, unsigned int shndx
,
3615 Output_section
* output_section
, Mips_address r_offset
)
3616 : sym_(sym
), r_type_(r_type
), relobj_(relobj
),
3617 shndx_(shndx
), output_section_(output_section
),
3621 // Emit this reloc if appropriate. This is called after we have
3622 // scanned all the relocations, so we know whether the symbol has
3623 // static relocations.
3625 emit(Reloc_section
* rel_dyn
, Mips_output_data_got
<size
, big_endian
>* got
,
3626 Symbol_table
* symtab
)
3628 if (!this->sym_
->has_static_relocs())
3630 got
->record_global_got_symbol(this->sym_
, this->relobj_
,
3631 this->r_type_
, true, false);
3632 if (!symbol_references_local(this->sym_
,
3633 this->sym_
->should_add_dynsym_entry(symtab
)))
3634 rel_dyn
->add_global(this->sym_
, this->r_type_
,
3635 this->output_section_
, this->relobj_
,
3636 this->shndx_
, this->r_offset_
);
3638 rel_dyn
->add_symbolless_global_addend(this->sym_
, this->r_type_
,
3639 this->output_section_
, this->relobj_
,
3640 this->shndx_
, this->r_offset_
);
3645 Mips_symbol
<size
>* sym_
;
3646 unsigned int r_type_
;
3647 Mips_relobj
<size
, big_endian
>* relobj_
;
3648 unsigned int shndx_
;
3649 Output_section
* output_section_
;
3650 Mips_address r_offset_
;
3653 // Adjust TLS relocation type based on the options and whether this
3654 // is a local symbol.
3655 static tls::Tls_optimization
3656 optimize_tls_reloc(bool is_final
, int r_type
);
3658 // Return whether there is a GOT section.
3660 has_got_section() const
3661 { return this->got_
!= NULL
; }
3663 // Check whether the given ELF header flags describe a 32-bit binary.
3665 mips_32bit_flags(elfcpp::Elf_Word
);
3668 mach_mips3000
= 3000,
3669 mach_mips3900
= 3900,
3670 mach_mips4000
= 4000,
3671 mach_mips4010
= 4010,
3672 mach_mips4100
= 4100,
3673 mach_mips4111
= 4111,
3674 mach_mips4120
= 4120,
3675 mach_mips4300
= 4300,
3676 mach_mips4400
= 4400,
3677 mach_mips4600
= 4600,
3678 mach_mips4650
= 4650,
3679 mach_mips5000
= 5000,
3680 mach_mips5400
= 5400,
3681 mach_mips5500
= 5500,
3682 mach_mips6000
= 6000,
3683 mach_mips7000
= 7000,
3684 mach_mips8000
= 8000,
3685 mach_mips9000
= 9000,
3686 mach_mips10000
= 10000,
3687 mach_mips12000
= 12000,
3688 mach_mips14000
= 14000,
3689 mach_mips16000
= 16000,
3692 mach_mips_loongson_2e
= 3001,
3693 mach_mips_loongson_2f
= 3002,
3694 mach_mips_loongson_3a
= 3003,
3695 mach_mips_sb1
= 12310201, // octal 'SB', 01
3696 mach_mips_octeon
= 6501,
3697 mach_mips_octeonp
= 6601,
3698 mach_mips_octeon2
= 6502,
3699 mach_mips_xlr
= 887682, // decimal 'XLR'
3700 mach_mipsisa32
= 32,
3701 mach_mipsisa32r2
= 33,
3702 mach_mipsisa64
= 64,
3703 mach_mipsisa64r2
= 65,
3704 mach_mips_micromips
= 96
3707 // Return the MACH for a MIPS e_flags value.
3709 elf_mips_mach(elfcpp::Elf_Word
);
3711 // Check whether machine EXTENSION is an extension of machine BASE.
3713 mips_mach_extends(unsigned int, unsigned int);
3715 // Merge processor specific flags.
3717 merge_processor_specific_flags(const std::string
&, elfcpp::Elf_Word
,
3718 unsigned char, bool);
3720 // True if we are linking for CPUs that are faster if JAL is converted to BAL.
3725 // True if we are linking for CPUs that are faster if JALR is converted to
3726 // BAL. This should be safe for all architectures. We enable this predicate
3732 // True if we are linking for CPUs that are faster if JR is converted to B.
3733 // This should be safe for all architectures. We enable this predicate for
3739 // Return the size of the GOT section.
3743 gold_assert(this->got_
!= NULL
);
3744 return this->got_
->data_size();
3747 // Create a PLT entry for a global symbol referenced by r_type relocation.
3749 make_plt_entry(Symbol_table
*, Layout
*, Mips_symbol
<size
>*,
3750 unsigned int r_type
);
3752 // Get the PLT section.
3753 Mips_output_data_plt
<size
, big_endian
>*
3756 gold_assert(this->plt_
!= NULL
);
3760 // Get the GOT PLT section.
3761 const Mips_output_data_plt
<size
, big_endian
>*
3762 got_plt_section() const
3764 gold_assert(this->got_plt_
!= NULL
);
3765 return this->got_plt_
;
3768 // Copy a relocation against a global symbol.
3770 copy_reloc(Symbol_table
* symtab
, Layout
* layout
,
3771 Sized_relobj_file
<size
, big_endian
>* object
,
3772 unsigned int shndx
, Output_section
* output_section
,
3773 Symbol
* sym
, const Reltype
& reloc
)
3775 unsigned int r_type
=
3776 Mips_classify_reloc
<elfcpp::SHT_REL
, size
, big_endian
>::
3778 this->copy_relocs_
.copy_reloc(symtab
, layout
,
3779 symtab
->get_sized_symbol
<size
>(sym
),
3780 object
, shndx
, output_section
,
3781 r_type
, reloc
.get_r_offset(), 0,
3782 this->rel_dyn_section(layout
));
3786 dynamic_reloc(Mips_symbol
<size
>* sym
, unsigned int r_type
,
3787 Mips_relobj
<size
, big_endian
>* relobj
,
3788 unsigned int shndx
, Output_section
* output_section
,
3789 Mips_address r_offset
)
3791 this->dyn_relocs_
.push_back(Dyn_reloc(sym
, r_type
, relobj
, shndx
,
3792 output_section
, r_offset
));
3795 // Calculate value of _gp symbol.
3797 set_gp(Layout
*, Symbol_table
*);
3800 elf_mips_abi_name(elfcpp::Elf_Word e_flags
, unsigned char ei_class
);
3802 elf_mips_mach_name(elfcpp::Elf_Word e_flags
);
3804 // Adds entries that describe how machines relate to one another. The entries
3805 // are ordered topologically with MIPS I extensions listed last. First
3806 // element is extension, second element is base.
3808 add_machine_extensions()
3810 // MIPS64r2 extensions.
3811 this->add_extension(mach_mips_octeon2
, mach_mips_octeonp
);
3812 this->add_extension(mach_mips_octeonp
, mach_mips_octeon
);
3813 this->add_extension(mach_mips_octeon
, mach_mipsisa64r2
);
3815 // MIPS64 extensions.
3816 this->add_extension(mach_mipsisa64r2
, mach_mipsisa64
);
3817 this->add_extension(mach_mips_sb1
, mach_mipsisa64
);
3818 this->add_extension(mach_mips_xlr
, mach_mipsisa64
);
3819 this->add_extension(mach_mips_loongson_3a
, mach_mipsisa64
);
3821 // MIPS V extensions.
3822 this->add_extension(mach_mipsisa64
, mach_mips5
);
3824 // R10000 extensions.
3825 this->add_extension(mach_mips12000
, mach_mips10000
);
3826 this->add_extension(mach_mips14000
, mach_mips10000
);
3827 this->add_extension(mach_mips16000
, mach_mips10000
);
3829 // R5000 extensions. Note: the vr5500 ISA is an extension of the core
3830 // vr5400 ISA, but doesn't include the multimedia stuff. It seems
3831 // better to allow vr5400 and vr5500 code to be merged anyway, since
3832 // many libraries will just use the core ISA. Perhaps we could add
3833 // some sort of ASE flag if this ever proves a problem.
3834 this->add_extension(mach_mips5500
, mach_mips5400
);
3835 this->add_extension(mach_mips5400
, mach_mips5000
);
3837 // MIPS IV extensions.
3838 this->add_extension(mach_mips5
, mach_mips8000
);
3839 this->add_extension(mach_mips10000
, mach_mips8000
);
3840 this->add_extension(mach_mips5000
, mach_mips8000
);
3841 this->add_extension(mach_mips7000
, mach_mips8000
);
3842 this->add_extension(mach_mips9000
, mach_mips8000
);
3844 // VR4100 extensions.
3845 this->add_extension(mach_mips4120
, mach_mips4100
);
3846 this->add_extension(mach_mips4111
, mach_mips4100
);
3848 // MIPS III extensions.
3849 this->add_extension(mach_mips_loongson_2e
, mach_mips4000
);
3850 this->add_extension(mach_mips_loongson_2f
, mach_mips4000
);
3851 this->add_extension(mach_mips8000
, mach_mips4000
);
3852 this->add_extension(mach_mips4650
, mach_mips4000
);
3853 this->add_extension(mach_mips4600
, mach_mips4000
);
3854 this->add_extension(mach_mips4400
, mach_mips4000
);
3855 this->add_extension(mach_mips4300
, mach_mips4000
);
3856 this->add_extension(mach_mips4100
, mach_mips4000
);
3857 this->add_extension(mach_mips4010
, mach_mips4000
);
3859 // MIPS32 extensions.
3860 this->add_extension(mach_mipsisa32r2
, mach_mipsisa32
);
3862 // MIPS II extensions.
3863 this->add_extension(mach_mips4000
, mach_mips6000
);
3864 this->add_extension(mach_mipsisa32
, mach_mips6000
);
3866 // MIPS I extensions.
3867 this->add_extension(mach_mips6000
, mach_mips3000
);
3868 this->add_extension(mach_mips3900
, mach_mips3000
);
3871 // Add value to MIPS extenstions.
3873 add_extension(unsigned int base
, unsigned int extension
)
3875 std::pair
<unsigned int, unsigned int> ext(base
, extension
);
3876 this->mips_mach_extensions_
.push_back(ext
);
3879 // Return the number of entries in the .dynsym section.
3880 unsigned int get_dt_mips_symtabno() const
3882 return ((unsigned int)(this->layout_
->dynsym_section()->data_size()
3883 / elfcpp::Elf_sizes
<size
>::sym_size
));
3884 // TODO(sasa): Entry size is MIPS_ELF_SYM_SIZE.
3887 // Information about this specific target which we pass to the
3888 // general Target structure.
3889 static const Target::Target_info mips_info
;
3891 Mips_output_data_got
<size
, big_endian
>* got_
;
3892 // gp symbol. It has the value of .got + 0x7FF0.
3893 Sized_symbol
<size
>* gp_
;
3895 Mips_output_data_plt
<size
, big_endian
>* plt_
;
3896 // The GOT PLT section.
3897 Output_data_space
* got_plt_
;
3898 // The dynamic reloc section.
3899 Reloc_section
* rel_dyn_
;
3900 // Relocs saved to avoid a COPY reloc.
3901 Mips_copy_relocs
<elfcpp::SHT_REL
, size
, big_endian
> copy_relocs_
;
3903 // A list of dyn relocs to be saved.
3904 std::vector
<Dyn_reloc
> dyn_relocs_
;
3906 // The LA25 stub section.
3907 Mips_output_data_la25_stub
<size
, big_endian
>* la25_stub_
;
3908 // Architecture extensions.
3909 std::vector
<std::pair
<unsigned int, unsigned int> > mips_mach_extensions_
;
3911 Mips_output_data_mips_stubs
<size
, big_endian
>* mips_stubs_
;
3913 unsigned char ei_class_
;
3917 typename
std::list
<got16_addend
<size
, big_endian
> > got16_addends_
;
3919 // Whether the entry symbol is mips16 or micromips.
3920 bool entry_symbol_is_compressed_
;
3922 // Whether we can use only 32-bit microMIPS instructions.
3923 // TODO(sasa): This should be a linker option.
3927 // Helper structure for R_MIPS*_HI16/LO16 and R_MIPS*_GOT16/LO16 relocations.
3928 // It records high part of the relocation pair.
3930 template<int size
, bool big_endian
>
3933 typedef typename
elfcpp::Elf_types
<size
>::Elf_Addr Mips_address
;
3935 reloc_high(unsigned char* _view
, const Mips_relobj
<size
, big_endian
>* _object
,
3936 const Symbol_value
<size
>* _psymval
, Mips_address _addend
,
3937 unsigned int _r_type
, unsigned int _r_sym
, bool _extract_addend
,
3938 Mips_address _address
= 0, bool _gp_disp
= false)
3939 : view(_view
), object(_object
), psymval(_psymval
), addend(_addend
),
3940 r_type(_r_type
), r_sym(_r_sym
), extract_addend(_extract_addend
),
3941 address(_address
), gp_disp(_gp_disp
)
3944 unsigned char* view
;
3945 const Mips_relobj
<size
, big_endian
>* object
;
3946 const Symbol_value
<size
>* psymval
;
3947 Mips_address addend
;
3948 unsigned int r_type
;
3950 bool extract_addend
;
3951 Mips_address address
;
3955 template<int size
, bool big_endian
>
3956 class Mips_relocate_functions
: public Relocate_functions
<size
, big_endian
>
3958 typedef typename
elfcpp::Elf_types
<size
>::Elf_Addr Mips_address
;
3959 typedef typename
elfcpp::Swap
<16, big_endian
>::Valtype Valtype16
;
3960 typedef typename
elfcpp::Swap
<32, big_endian
>::Valtype Valtype32
;
3965 STATUS_OKAY
, // No error during relocation.
3966 STATUS_OVERFLOW
, // Relocation overflow.
3967 STATUS_BAD_RELOC
// Relocation cannot be applied.
3971 typedef Relocate_functions
<size
, big_endian
> Base
;
3972 typedef Mips_relocate_functions
<size
, big_endian
> This
;
3974 static typename
std::list
<reloc_high
<size
, big_endian
> > hi16_relocs
;
3975 static typename
std::list
<reloc_high
<size
, big_endian
> > got16_relocs
;
3977 // R_MIPS16_26 is used for the mips16 jal and jalx instructions.
3978 // Most mips16 instructions are 16 bits, but these instructions
3981 // The format of these instructions is:
3983 // +--------------+--------------------------------+
3984 // | JALX | X| Imm 20:16 | Imm 25:21 |
3985 // +--------------+--------------------------------+
3986 // | Immediate 15:0 |
3987 // +-----------------------------------------------+
3989 // JALX is the 5-bit value 00011. X is 0 for jal, 1 for jalx.
3990 // Note that the immediate value in the first word is swapped.
3992 // When producing a relocatable object file, R_MIPS16_26 is
3993 // handled mostly like R_MIPS_26. In particular, the addend is
3994 // stored as a straight 26-bit value in a 32-bit instruction.
3995 // (gas makes life simpler for itself by never adjusting a
3996 // R_MIPS16_26 reloc to be against a section, so the addend is
3997 // always zero). However, the 32 bit instruction is stored as 2
3998 // 16-bit values, rather than a single 32-bit value. In a
3999 // big-endian file, the result is the same; in a little-endian
4000 // file, the two 16-bit halves of the 32 bit value are swapped.
4001 // This is so that a disassembler can recognize the jal
4004 // When doing a final link, R_MIPS16_26 is treated as a 32 bit
4005 // instruction stored as two 16-bit values. The addend A is the
4006 // contents of the targ26 field. The calculation is the same as
4007 // R_MIPS_26. When storing the calculated value, reorder the
4008 // immediate value as shown above, and don't forget to store the
4009 // value as two 16-bit values.
4011 // To put it in MIPS ABI terms, the relocation field is T-targ26-16,
4015 // +--------+----------------------+
4019 // +--------+----------------------+
4022 // +----------+------+-------------+
4024 // | sub1 | | sub2 |
4025 // |0 9|10 15|16 31|
4026 // +----------+--------------------+
4027 // where targ26-16 is sub1 followed by sub2 (i.e., the addend field A is
4028 // ((sub1 << 16) | sub2)).
4030 // When producing a relocatable object file, the calculation is
4031 // (((A < 2) | ((P + 4) & 0xf0000000) + S) >> 2)
4032 // When producing a fully linked file, the calculation is
4033 // let R = (((A < 2) | ((P + 4) & 0xf0000000) + S) >> 2)
4034 // ((R & 0x1f0000) << 5) | ((R & 0x3e00000) >> 5) | (R & 0xffff)
4036 // The table below lists the other MIPS16 instruction relocations.
4037 // Each one is calculated in the same way as the non-MIPS16 relocation
4038 // given on the right, but using the extended MIPS16 layout of 16-bit
4039 // immediate fields:
4041 // R_MIPS16_GPREL R_MIPS_GPREL16
4042 // R_MIPS16_GOT16 R_MIPS_GOT16
4043 // R_MIPS16_CALL16 R_MIPS_CALL16
4044 // R_MIPS16_HI16 R_MIPS_HI16
4045 // R_MIPS16_LO16 R_MIPS_LO16
4047 // A typical instruction will have a format like this:
4049 // +--------------+--------------------------------+
4050 // | EXTEND | Imm 10:5 | Imm 15:11 |
4051 // +--------------+--------------------------------+
4052 // | Major | rx | ry | Imm 4:0 |
4053 // +--------------+--------------------------------+
4055 // EXTEND is the five bit value 11110. Major is the instruction
4058 // All we need to do here is shuffle the bits appropriately.
4059 // As above, the two 16-bit halves must be swapped on a
4060 // little-endian system.
4062 // Similar to MIPS16, the two 16-bit halves in microMIPS must be swapped
4063 // on a little-endian system. This does not apply to R_MICROMIPS_PC7_S1
4064 // and R_MICROMIPS_PC10_S1 relocs that apply to 16-bit instructions.
4067 should_shuffle_micromips_reloc(unsigned int r_type
)
4069 return (micromips_reloc(r_type
)
4070 && r_type
!= elfcpp::R_MICROMIPS_PC7_S1
4071 && r_type
!= elfcpp::R_MICROMIPS_PC10_S1
);
4075 mips_reloc_unshuffle(unsigned char* view
, unsigned int r_type
,
4078 if (!mips16_reloc(r_type
)
4079 && !should_shuffle_micromips_reloc(r_type
))
4082 // Pick up the first and second halfwords of the instruction.
4083 Valtype16 first
= elfcpp::Swap
<16, big_endian
>::readval(view
);
4084 Valtype16 second
= elfcpp::Swap
<16, big_endian
>::readval(view
+ 2);
4087 if (micromips_reloc(r_type
)
4088 || (r_type
== elfcpp::R_MIPS16_26
&& !jal_shuffle
))
4089 val
= first
<< 16 | second
;
4090 else if (r_type
!= elfcpp::R_MIPS16_26
)
4091 val
= (((first
& 0xf800) << 16) | ((second
& 0xffe0) << 11)
4092 | ((first
& 0x1f) << 11) | (first
& 0x7e0) | (second
& 0x1f));
4094 val
= (((first
& 0xfc00) << 16) | ((first
& 0x3e0) << 11)
4095 | ((first
& 0x1f) << 21) | second
);
4097 elfcpp::Swap
<32, big_endian
>::writeval(view
, val
);
4101 mips_reloc_shuffle(unsigned char* view
, unsigned int r_type
, bool jal_shuffle
)
4103 if (!mips16_reloc(r_type
)
4104 && !should_shuffle_micromips_reloc(r_type
))
4107 Valtype32 val
= elfcpp::Swap
<32, big_endian
>::readval(view
);
4108 Valtype16 first
, second
;
4110 if (micromips_reloc(r_type
)
4111 || (r_type
== elfcpp::R_MIPS16_26
&& !jal_shuffle
))
4113 second
= val
& 0xffff;
4116 else if (r_type
!= elfcpp::R_MIPS16_26
)
4118 second
= ((val
>> 11) & 0xffe0) | (val
& 0x1f);
4119 first
= ((val
>> 16) & 0xf800) | ((val
>> 11) & 0x1f) | (val
& 0x7e0);
4123 second
= val
& 0xffff;
4124 first
= ((val
>> 16) & 0xfc00) | ((val
>> 11) & 0x3e0)
4125 | ((val
>> 21) & 0x1f);
4128 elfcpp::Swap
<16, big_endian
>::writeval(view
+ 2, second
);
4129 elfcpp::Swap
<16, big_endian
>::writeval(view
, first
);
4133 // R_MIPS_16: S + sign-extend(A)
4134 static inline typename
This::Status
4135 rel16(unsigned char* view
, const Mips_relobj
<size
, big_endian
>* object
,
4136 const Symbol_value
<size
>* psymval
, Mips_address addend_a
,
4137 bool extract_addend
, unsigned int r_type
)
4139 mips_reloc_unshuffle(view
, r_type
, false);
4140 Valtype16
* wv
= reinterpret_cast<Valtype16
*>(view
);
4141 Valtype16 val
= elfcpp::Swap
<16, big_endian
>::readval(wv
);
4143 Valtype32 addend
= (extract_addend
? Bits
<16>::sign_extend32(val
)
4144 : Bits
<16>::sign_extend32(addend_a
));
4146 Valtype32 x
= psymval
->value(object
, addend
);
4147 val
= Bits
<16>::bit_select32(val
, x
, 0xffffU
);
4148 elfcpp::Swap
<16, big_endian
>::writeval(wv
, val
);
4149 mips_reloc_shuffle(view
, r_type
, false);
4150 return (Bits
<16>::has_overflow32(x
)
4151 ? This::STATUS_OVERFLOW
4152 : This::STATUS_OKAY
);
4156 static inline typename
This::Status
4157 rel32(unsigned char* view
, const Mips_relobj
<size
, big_endian
>* object
,
4158 const Symbol_value
<size
>* psymval
, Mips_address addend_a
,
4159 bool extract_addend
, unsigned int r_type
)
4161 mips_reloc_unshuffle(view
, r_type
, false);
4162 Valtype32
* wv
= reinterpret_cast<Valtype32
*>(view
);
4163 Valtype32 addend
= (extract_addend
4164 ? elfcpp::Swap
<32, big_endian
>::readval(wv
)
4165 : Bits
<32>::sign_extend32(addend_a
));
4166 Valtype32 x
= psymval
->value(object
, addend
);
4167 elfcpp::Swap
<32, big_endian
>::writeval(wv
, x
);
4168 mips_reloc_shuffle(view
, r_type
, false);
4169 return This::STATUS_OKAY
;
4172 // R_MIPS_JALR, R_MICROMIPS_JALR
4173 static inline typename
This::Status
4174 reljalr(unsigned char* view
, const Mips_relobj
<size
, big_endian
>* object
,
4175 const Symbol_value
<size
>* psymval
, Mips_address address
,
4176 Mips_address addend_a
, bool extract_addend
, bool cross_mode_jump
,
4177 unsigned int r_type
, bool jalr_to_bal
, bool jr_to_b
)
4179 mips_reloc_unshuffle(view
, r_type
, false);
4180 Valtype32
* wv
= reinterpret_cast<Valtype32
*>(view
);
4181 Valtype32 addend
= extract_addend
? 0 : addend_a
;
4182 Valtype32 val
= elfcpp::Swap
<32, big_endian
>::readval(wv
);
4184 // Try converting J(AL)R to B(AL), if the target is in range.
4185 if (!parameters
->options().relocatable()
4186 && r_type
== elfcpp::R_MIPS_JALR
4188 && ((jalr_to_bal
&& val
== 0x0320f809) // jalr t9
4189 || (jr_to_b
&& val
== 0x03200008))) // jr t9
4191 int offset
= psymval
->value(object
, addend
) - (address
+ 4);
4192 if (!Bits
<18>::has_overflow32(offset
))
4194 if (val
== 0x03200008) // jr t9
4195 val
= 0x10000000 | (((Valtype32
)offset
>> 2) & 0xffff); // b addr
4197 val
= 0x04110000 | (((Valtype32
)offset
>> 2) & 0xffff); //bal addr
4201 elfcpp::Swap
<32, big_endian
>::writeval(wv
, val
);
4202 mips_reloc_shuffle(view
, r_type
, false);
4203 return This::STATUS_OKAY
;
4206 // R_MIPS_PC32: S + A - P
4207 static inline typename
This::Status
4208 relpc32(unsigned char* view
, const Mips_relobj
<size
, big_endian
>* object
,
4209 const Symbol_value
<size
>* psymval
, Mips_address address
,
4210 Mips_address addend_a
, bool extract_addend
, unsigned int r_type
)
4212 mips_reloc_unshuffle(view
, r_type
, false);
4213 Valtype32
* wv
= reinterpret_cast<Valtype32
*>(view
);
4214 Valtype32 addend
= (extract_addend
4215 ? elfcpp::Swap
<32, big_endian
>::readval(wv
)
4216 : Bits
<32>::sign_extend32(addend_a
));
4217 Valtype32 x
= psymval
->value(object
, addend
) - address
;
4218 elfcpp::Swap
<32, big_endian
>::writeval(wv
, x
);
4219 mips_reloc_shuffle(view
, r_type
, false);
4220 return This::STATUS_OKAY
;
4223 // R_MIPS_26, R_MIPS16_26, R_MICROMIPS_26_S1
4224 static inline typename
This::Status
4225 rel26(unsigned char* view
, const Mips_relobj
<size
, big_endian
>* object
,
4226 const Symbol_value
<size
>* psymval
, Mips_address address
,
4227 bool local
, Mips_address addend_a
, bool extract_addend
,
4228 const Symbol
* gsym
, bool cross_mode_jump
, unsigned int r_type
,
4231 mips_reloc_unshuffle(view
, r_type
, false);
4232 Valtype32
* wv
= reinterpret_cast<Valtype32
*>(view
);
4233 Valtype32 val
= elfcpp::Swap
<32, big_endian
>::readval(wv
);
4238 if (r_type
== elfcpp::R_MICROMIPS_26_S1
)
4239 addend
= (val
& 0x03ffffff) << 1;
4241 addend
= (val
& 0x03ffffff) << 2;
4246 // Make sure the target of JALX is word-aligned. Bit 0 must be
4247 // the correct ISA mode selector and bit 1 must be 0.
4249 && (psymval
->value(object
, 0) & 3) != (r_type
== elfcpp::R_MIPS_26
))
4251 gold_warning(_("JALX to a non-word-aligned address"));
4252 mips_reloc_shuffle(view
, r_type
, !parameters
->options().relocatable());
4253 return This::STATUS_BAD_RELOC
;
4256 // Shift is 2, unusually, for microMIPS JALX.
4257 unsigned int shift
=
4258 (!cross_mode_jump
&& r_type
== elfcpp::R_MICROMIPS_26_S1
) ? 1 : 2;
4262 x
= addend
| ((address
+ 4) & (0xfc000000 << shift
));
4266 x
= Bits
<27>::sign_extend32(addend
);
4268 x
= Bits
<28>::sign_extend32(addend
);
4270 x
= psymval
->value(object
, x
) >> shift
;
4272 if (!local
&& !gsym
->is_weak_undefined())
4274 if ((x
>> 26) != ((address
+ 4) >> (26 + shift
)))
4276 gold_error(_("relocation truncated to fit: %u against '%s'"),
4277 r_type
, gsym
->name());
4278 return This::STATUS_OVERFLOW
;
4282 val
= Bits
<32>::bit_select32(val
, x
, 0x03ffffff);
4284 // If required, turn JAL into JALX.
4285 if (cross_mode_jump
)
4288 Valtype32 opcode
= val
>> 26;
4289 Valtype32 jalx_opcode
;
4291 // Check to see if the opcode is already JAL or JALX.
4292 if (r_type
== elfcpp::R_MIPS16_26
)
4294 ok
= (opcode
== 0x6) || (opcode
== 0x7);
4297 else if (r_type
== elfcpp::R_MICROMIPS_26_S1
)
4299 ok
= (opcode
== 0x3d) || (opcode
== 0x3c);
4304 ok
= (opcode
== 0x3) || (opcode
== 0x1d);
4308 // If the opcode is not JAL or JALX, there's a problem. We cannot
4309 // convert J or JALS to JALX.
4312 gold_error(_("Unsupported jump between ISA modes; consider "
4313 "recompiling with interlinking enabled."));
4314 return This::STATUS_BAD_RELOC
;
4317 // Make this the JALX opcode.
4318 val
= (val
& ~(0x3f << 26)) | (jalx_opcode
<< 26);
4321 // Try converting JAL to BAL, if the target is in range.
4322 if (!parameters
->options().relocatable()
4325 && r_type
== elfcpp::R_MIPS_26
4326 && (val
>> 26) == 0x3))) // jal addr
4328 Valtype32 dest
= (x
<< 2) | (((address
+ 4) >> 28) << 28);
4329 int offset
= dest
- (address
+ 4);
4330 if (!Bits
<18>::has_overflow32(offset
))
4332 if (val
== 0x03200008) // jr t9
4333 val
= 0x10000000 | (((Valtype32
)offset
>> 2) & 0xffff); // b addr
4335 val
= 0x04110000 | (((Valtype32
)offset
>> 2) & 0xffff); //bal addr
4339 elfcpp::Swap
<32, big_endian
>::writeval(wv
, val
);
4340 mips_reloc_shuffle(view
, r_type
, !parameters
->options().relocatable());
4341 return This::STATUS_OKAY
;
4345 static inline typename
This::Status
4346 relpc16(unsigned char* view
, const Mips_relobj
<size
, big_endian
>* object
,
4347 const Symbol_value
<size
>* psymval
, Mips_address address
,
4348 Mips_address addend_a
, bool extract_addend
, unsigned int r_type
)
4350 mips_reloc_unshuffle(view
, r_type
, false);
4351 Valtype32
* wv
= reinterpret_cast<Valtype32
*>(view
);
4352 Valtype32 val
= elfcpp::Swap
<32, big_endian
>::readval(wv
);
4354 Valtype32 addend
= extract_addend
? (val
& 0xffff) << 2 : addend_a
;
4355 addend
= Bits
<18>::sign_extend32(addend
);
4357 Valtype32 x
= psymval
->value(object
, addend
) - address
;
4358 val
= Bits
<16>::bit_select32(val
, x
>> 2, 0xffff);
4359 elfcpp::Swap
<32, big_endian
>::writeval(wv
, val
);
4360 mips_reloc_shuffle(view
, r_type
, false);
4361 return (Bits
<18>::has_overflow32(x
)
4362 ? This::STATUS_OVERFLOW
4363 : This::STATUS_OKAY
);
4366 // R_MICROMIPS_PC7_S1
4367 static inline typename
This::Status
4368 relmicromips_pc7_s1(unsigned char* view
,
4369 const Mips_relobj
<size
, big_endian
>* object
,
4370 const Symbol_value
<size
>* psymval
, Mips_address address
,
4371 Mips_address addend_a
, bool extract_addend
,
4372 unsigned int r_type
)
4374 mips_reloc_unshuffle(view
, r_type
, false);
4375 Valtype32
* wv
= reinterpret_cast<Valtype32
*>(view
);
4376 Valtype32 val
= elfcpp::Swap
<32, big_endian
>::readval(wv
);
4378 Valtype32 addend
= extract_addend
? (val
& 0x7f) << 1 : addend_a
;
4379 addend
= Bits
<8>::sign_extend32(addend
);
4381 Valtype32 x
= psymval
->value(object
, addend
) - address
;
4382 val
= Bits
<16>::bit_select32(val
, x
>> 1, 0x7f);
4383 elfcpp::Swap
<32, big_endian
>::writeval(wv
, val
);
4384 mips_reloc_shuffle(view
, r_type
, false);
4385 return (Bits
<8>::has_overflow32(x
)
4386 ? This::STATUS_OVERFLOW
4387 : This::STATUS_OKAY
);
4390 // R_MICROMIPS_PC10_S1
4391 static inline typename
This::Status
4392 relmicromips_pc10_s1(unsigned char* view
,
4393 const Mips_relobj
<size
, big_endian
>* object
,
4394 const Symbol_value
<size
>* psymval
, Mips_address address
,
4395 Mips_address addend_a
, bool extract_addend
,
4396 unsigned int r_type
)
4398 mips_reloc_unshuffle(view
, r_type
, false);
4399 Valtype32
* wv
= reinterpret_cast<Valtype32
*>(view
);
4400 Valtype32 val
= elfcpp::Swap
<32, big_endian
>::readval(wv
);
4402 Valtype32 addend
= extract_addend
? (val
& 0x3ff) << 1 : addend_a
;
4403 addend
= Bits
<11>::sign_extend32(addend
);
4405 Valtype32 x
= psymval
->value(object
, addend
) - address
;
4406 val
= Bits
<16>::bit_select32(val
, x
>> 1, 0x3ff);
4407 elfcpp::Swap
<32, big_endian
>::writeval(wv
, val
);
4408 mips_reloc_shuffle(view
, r_type
, false);
4409 return (Bits
<11>::has_overflow32(x
)
4410 ? This::STATUS_OVERFLOW
4411 : This::STATUS_OKAY
);
4414 // R_MICROMIPS_PC16_S1
4415 static inline typename
This::Status
4416 relmicromips_pc16_s1(unsigned char* view
,
4417 const Mips_relobj
<size
, big_endian
>* object
,
4418 const Symbol_value
<size
>* psymval
, Mips_address address
,
4419 Mips_address addend_a
, bool extract_addend
,
4420 unsigned int r_type
)
4422 mips_reloc_unshuffle(view
, r_type
, false);
4423 Valtype32
* wv
= reinterpret_cast<Valtype32
*>(view
);
4424 Valtype32 val
= elfcpp::Swap
<32, big_endian
>::readval(wv
);
4426 Valtype32 addend
= extract_addend
? (val
& 0xffff) << 1 : addend_a
;
4427 addend
= Bits
<17>::sign_extend32(addend
);
4429 Valtype32 x
= psymval
->value(object
, addend
) - address
;
4430 val
= Bits
<16>::bit_select32(val
, x
>> 1, 0xffff);
4431 elfcpp::Swap
<32, big_endian
>::writeval(wv
, val
);
4432 mips_reloc_shuffle(view
, r_type
, false);
4433 return (Bits
<17>::has_overflow32(x
)
4434 ? This::STATUS_OVERFLOW
4435 : This::STATUS_OKAY
);
4438 // R_MIPS_HI16, R_MIPS16_HI16, R_MICROMIPS_HI16,
4439 static inline typename
This::Status
4440 relhi16(unsigned char* view
, const Mips_relobj
<size
, big_endian
>* object
,
4441 const Symbol_value
<size
>* psymval
, Mips_address addend
,
4442 Mips_address address
, bool gp_disp
, unsigned int r_type
,
4443 unsigned int r_sym
, bool extract_addend
)
4445 // Record the relocation. It will be resolved when we find lo16 part.
4446 hi16_relocs
.push_back(reloc_high
<size
, big_endian
>(view
, object
, psymval
,
4447 addend
, r_type
, r_sym
, extract_addend
, address
,
4449 return This::STATUS_OKAY
;
4452 // R_MIPS_HI16, R_MIPS16_HI16, R_MICROMIPS_HI16,
4453 static inline typename
This::Status
4454 do_relhi16(unsigned char* view
, const Mips_relobj
<size
, big_endian
>* object
,
4455 const Symbol_value
<size
>* psymval
, Mips_address addend_hi
,
4456 Mips_address address
, bool is_gp_disp
, unsigned int r_type
,
4457 bool extract_addend
, Valtype32 addend_lo
,
4458 Target_mips
<size
, big_endian
>* target
)
4460 mips_reloc_unshuffle(view
, r_type
, false);
4461 Valtype32
* wv
= reinterpret_cast<Valtype32
*>(view
);
4462 Valtype32 val
= elfcpp::Swap
<32, big_endian
>::readval(wv
);
4464 Valtype32 addend
= (extract_addend
? ((val
& 0xffff) << 16) + addend_lo
4469 value
= psymval
->value(object
, addend
);
4472 // For MIPS16 ABI code we generate this sequence
4473 // 0: li $v0,%hi(_gp_disp)
4474 // 4: addiupc $v1,%lo(_gp_disp)
4478 // So the offsets of hi and lo relocs are the same, but the
4479 // base $pc is that used by the ADDIUPC instruction at $t9 + 4.
4480 // ADDIUPC clears the low two bits of the instruction address,
4481 // so the base is ($t9 + 4) & ~3.
4483 if (r_type
== elfcpp::R_MIPS16_HI16
)
4484 gp_disp
= (target
->adjusted_gp_value(object
)
4485 - ((address
+ 4) & ~0x3));
4486 // The microMIPS .cpload sequence uses the same assembly
4487 // instructions as the traditional psABI version, but the
4488 // incoming $t9 has the low bit set.
4489 else if (r_type
== elfcpp::R_MICROMIPS_HI16
)
4490 gp_disp
= target
->adjusted_gp_value(object
) - address
- 1;
4492 gp_disp
= target
->adjusted_gp_value(object
) - address
;
4493 value
= gp_disp
+ addend
;
4495 Valtype32 x
= ((value
+ 0x8000) >> 16) & 0xffff;
4496 val
= Bits
<32>::bit_select32(val
, x
, 0xffff);
4497 elfcpp::Swap
<32, big_endian
>::writeval(wv
, val
);
4498 mips_reloc_shuffle(view
, r_type
, false);
4499 return (is_gp_disp
&& Bits
<16>::has_overflow32(x
)
4500 ? This::STATUS_OVERFLOW
4501 : This::STATUS_OKAY
);
4504 // R_MIPS_GOT16, R_MIPS16_GOT16, R_MICROMIPS_GOT16
4505 static inline typename
This::Status
4506 relgot16_local(unsigned char* view
,
4507 const Mips_relobj
<size
, big_endian
>* object
,
4508 const Symbol_value
<size
>* psymval
, Mips_address addend_a
,
4509 bool extract_addend
, unsigned int r_type
, unsigned int r_sym
)
4511 // Record the relocation. It will be resolved when we find lo16 part.
4512 got16_relocs
.push_back(reloc_high
<size
, big_endian
>(view
, object
, psymval
,
4513 addend_a
, r_type
, r_sym
, extract_addend
));
4514 return This::STATUS_OKAY
;
4517 // R_MIPS_GOT16, R_MIPS16_GOT16, R_MICROMIPS_GOT16
4518 static inline typename
This::Status
4519 do_relgot16_local(unsigned char* view
,
4520 const Mips_relobj
<size
, big_endian
>* object
,
4521 const Symbol_value
<size
>* psymval
, Mips_address addend_hi
,
4522 unsigned int r_type
, bool extract_addend
,
4523 Valtype32 addend_lo
, Target_mips
<size
, big_endian
>* target
)
4525 mips_reloc_unshuffle(view
, r_type
, false);
4526 Valtype32
* wv
= reinterpret_cast<Valtype32
*>(view
);
4527 Valtype32 val
= elfcpp::Swap
<32, big_endian
>::readval(wv
);
4529 Valtype32 addend
= (extract_addend
? ((val
& 0xffff) << 16) + addend_lo
4532 // Find GOT page entry.
4533 Mips_address value
= ((psymval
->value(object
, addend
) + 0x8000) >> 16)
4536 unsigned int got_offset
=
4537 target
->got_section()->get_got_page_offset(value
, object
);
4539 // Resolve the relocation.
4540 Valtype32 x
= target
->got_section()->gp_offset(got_offset
, object
);
4541 val
= Bits
<32>::bit_select32(val
, x
, 0xffff);
4542 elfcpp::Swap
<32, big_endian
>::writeval(wv
, val
);
4543 mips_reloc_shuffle(view
, r_type
, false);
4544 return (Bits
<16>::has_overflow32(x
)
4545 ? This::STATUS_OVERFLOW
4546 : This::STATUS_OKAY
);
4549 // R_MIPS_LO16, R_MIPS16_LO16, R_MICROMIPS_LO16, R_MICROMIPS_HI0_LO16
4550 static inline typename
This::Status
4551 rello16(Target_mips
<size
, big_endian
>* target
, unsigned char* view
,
4552 const Mips_relobj
<size
, big_endian
>* object
,
4553 const Symbol_value
<size
>* psymval
, Mips_address addend_a
,
4554 bool extract_addend
, Mips_address address
, bool is_gp_disp
,
4555 unsigned int r_type
, unsigned int r_sym
)
4557 mips_reloc_unshuffle(view
, r_type
, false);
4558 Valtype32
* wv
= reinterpret_cast<Valtype32
*>(view
);
4559 Valtype32 val
= elfcpp::Swap
<32, big_endian
>::readval(wv
);
4561 Valtype32 addend
= (extract_addend
? Bits
<16>::sign_extend32(val
& 0xffff)
4564 // Resolve pending R_MIPS_HI16 relocations.
4565 typename
std::list
<reloc_high
<size
, big_endian
> >::iterator it
=
4566 hi16_relocs
.begin();
4567 while (it
!= hi16_relocs
.end())
4569 reloc_high
<size
, big_endian
> hi16
= *it
;
4570 if (hi16
.r_sym
== r_sym
4571 && is_matching_lo16_reloc(hi16
.r_type
, r_type
))
4573 if (do_relhi16(hi16
.view
, hi16
.object
, hi16
.psymval
, hi16
.addend
,
4574 hi16
.address
, hi16
.gp_disp
, hi16
.r_type
,
4575 hi16
.extract_addend
, addend
, target
)
4576 == This::STATUS_OVERFLOW
)
4577 return This::STATUS_OVERFLOW
;
4578 it
= hi16_relocs
.erase(it
);
4584 // Resolve pending local R_MIPS_GOT16 relocations.
4585 typename
std::list
<reloc_high
<size
, big_endian
> >::iterator it2
=
4586 got16_relocs
.begin();
4587 while (it2
!= got16_relocs
.end())
4589 reloc_high
<size
, big_endian
> got16
= *it2
;
4590 if (got16
.r_sym
== r_sym
4591 && is_matching_lo16_reloc(got16
.r_type
, r_type
))
4593 if (do_relgot16_local(got16
.view
, got16
.object
, got16
.psymval
,
4594 got16
.addend
, got16
.r_type
,
4595 got16
.extract_addend
, addend
,
4596 target
) == This::STATUS_OVERFLOW
)
4597 return This::STATUS_OVERFLOW
;
4598 it2
= got16_relocs
.erase(it2
);
4604 // Resolve R_MIPS_LO16 relocation.
4607 x
= psymval
->value(object
, addend
);
4610 // See the comment for R_MIPS16_HI16 above for the reason
4611 // for this conditional.
4613 if (r_type
== elfcpp::R_MIPS16_LO16
)
4614 gp_disp
= target
->adjusted_gp_value(object
) - (address
& ~0x3);
4615 else if (r_type
== elfcpp::R_MICROMIPS_LO16
4616 || r_type
== elfcpp::R_MICROMIPS_HI0_LO16
)
4617 gp_disp
= target
->adjusted_gp_value(object
) - address
+ 3;
4619 gp_disp
= target
->adjusted_gp_value(object
) - address
+ 4;
4620 // The MIPS ABI requires checking the R_MIPS_LO16 relocation
4621 // for overflow. Relocations against _gp_disp are normally
4622 // generated from the .cpload pseudo-op. It generates code
4623 // that normally looks like this:
4625 // lui $gp,%hi(_gp_disp)
4626 // addiu $gp,$gp,%lo(_gp_disp)
4629 // Here $t9 holds the address of the function being called,
4630 // as required by the MIPS ELF ABI. The R_MIPS_LO16
4631 // relocation can easily overflow in this situation, but the
4632 // R_MIPS_HI16 relocation will handle the overflow.
4633 // Therefore, we consider this a bug in the MIPS ABI, and do
4634 // not check for overflow here.
4635 x
= gp_disp
+ addend
;
4637 val
= Bits
<32>::bit_select32(val
, x
, 0xffff);
4638 elfcpp::Swap
<32, big_endian
>::writeval(wv
, val
);
4639 mips_reloc_shuffle(view
, r_type
, false);
4640 return This::STATUS_OKAY
;
4643 // R_MIPS_CALL16, R_MIPS16_CALL16, R_MICROMIPS_CALL16
4644 // R_MIPS_GOT16, R_MIPS16_GOT16, R_MICROMIPS_GOT16
4645 // R_MIPS_TLS_GD, R_MIPS16_TLS_GD, R_MICROMIPS_TLS_GD
4646 // R_MIPS_TLS_GOTTPREL, R_MIPS16_TLS_GOTTPREL, R_MICROMIPS_TLS_GOTTPREL
4647 // R_MIPS_TLS_LDM, R_MIPS16_TLS_LDM, R_MICROMIPS_TLS_LDM
4648 // R_MIPS_GOT_DISP, R_MICROMIPS_GOT_DISP
4649 static inline typename
This::Status
4650 relgot(unsigned char* view
, int gp_offset
, unsigned int r_type
)
4652 mips_reloc_unshuffle(view
, r_type
, false);
4653 Valtype32
* wv
= reinterpret_cast<Valtype32
*>(view
);
4654 Valtype32 val
= elfcpp::Swap
<32, big_endian
>::readval(wv
);
4655 Valtype32 x
= gp_offset
;
4656 val
= Bits
<32>::bit_select32(val
, x
, 0xffff);
4657 elfcpp::Swap
<32, big_endian
>::writeval(wv
, val
);
4658 mips_reloc_shuffle(view
, r_type
, false);
4659 return (Bits
<16>::has_overflow32(x
)
4660 ? This::STATUS_OVERFLOW
4661 : This::STATUS_OKAY
);
4664 // R_MIPS_GOT_PAGE, R_MICROMIPS_GOT_PAGE
4665 static inline typename
This::Status
4666 relgotpage(Target_mips
<size
, big_endian
>* target
, unsigned char* view
,
4667 const Mips_relobj
<size
, big_endian
>* object
,
4668 const Symbol_value
<size
>* psymval
, Mips_address addend_a
,
4669 bool extract_addend
, unsigned int r_type
)
4671 mips_reloc_unshuffle(view
, r_type
, false);
4672 Valtype32
* wv
= reinterpret_cast<Valtype32
*>(view
);
4673 Valtype32 val
= elfcpp::Swap
<32, big_endian
>::readval(view
);
4674 Valtype32 addend
= extract_addend
? val
& 0xffff : addend_a
;
4676 // Find a GOT page entry that points to within 32KB of symbol + addend.
4677 Mips_address value
= (psymval
->value(object
, addend
) + 0x8000) & ~0xffff;
4678 unsigned int got_offset
=
4679 target
->got_section()->get_got_page_offset(value
, object
);
4681 Valtype32 x
= target
->got_section()->gp_offset(got_offset
, object
);
4682 val
= Bits
<32>::bit_select32(val
, x
, 0xffff);
4683 elfcpp::Swap
<32, big_endian
>::writeval(wv
, val
);
4684 mips_reloc_shuffle(view
, r_type
, false);
4685 return (Bits
<16>::has_overflow32(x
)
4686 ? This::STATUS_OVERFLOW
4687 : This::STATUS_OKAY
);
4690 // R_MIPS_GOT_OFST, R_MICROMIPS_GOT_OFST
4691 static inline typename
This::Status
4692 relgotofst(Target_mips
<size
, big_endian
>* target
, unsigned char* view
,
4693 const Mips_relobj
<size
, big_endian
>* object
,
4694 const Symbol_value
<size
>* psymval
, Mips_address addend_a
,
4695 bool extract_addend
, bool local
, unsigned int r_type
)
4697 mips_reloc_unshuffle(view
, r_type
, false);
4698 Valtype32
* wv
= reinterpret_cast<Valtype32
*>(view
);
4699 Valtype32 val
= elfcpp::Swap
<32, big_endian
>::readval(view
);
4700 Valtype32 addend
= extract_addend
? val
& 0xffff : addend_a
;
4702 // For a local symbol, find a GOT page entry that points to within 32KB of
4703 // symbol + addend. Relocation value is the offset of the GOT page entry's
4704 // value from symbol + addend.
4705 // For a global symbol, relocation value is addend.
4709 // Find GOT page entry.
4710 Mips_address value
= ((psymval
->value(object
, addend
) + 0x8000)
4712 target
->got_section()->get_got_page_offset(value
, object
);
4714 x
= psymval
->value(object
, addend
) - value
;
4718 val
= Bits
<32>::bit_select32(val
, x
, 0xffff);
4719 elfcpp::Swap
<32, big_endian
>::writeval(wv
, val
);
4720 mips_reloc_shuffle(view
, r_type
, false);
4721 return (Bits
<16>::has_overflow32(x
)
4722 ? This::STATUS_OVERFLOW
4723 : This::STATUS_OKAY
);
4726 // R_MIPS_GOT_HI16, R_MIPS_CALL_HI16,
4727 // R_MICROMIPS_GOT_HI16, R_MICROMIPS_CALL_HI16
4728 static inline typename
This::Status
4729 relgot_hi16(unsigned char* view
, int gp_offset
, unsigned int r_type
)
4731 mips_reloc_unshuffle(view
, r_type
, false);
4732 Valtype32
* wv
= reinterpret_cast<Valtype32
*>(view
);
4733 Valtype32 val
= elfcpp::Swap
<32, big_endian
>::readval(wv
);
4734 Valtype32 x
= gp_offset
;
4735 x
= ((x
+ 0x8000) >> 16) & 0xffff;
4736 val
= Bits
<32>::bit_select32(val
, x
, 0xffff);
4737 elfcpp::Swap
<32, big_endian
>::writeval(wv
, val
);
4738 mips_reloc_shuffle(view
, r_type
, false);
4739 return This::STATUS_OKAY
;
4742 // R_MIPS_GOT_LO16, R_MIPS_CALL_LO16,
4743 // R_MICROMIPS_GOT_LO16, R_MICROMIPS_CALL_LO16
4744 static inline typename
This::Status
4745 relgot_lo16(unsigned char* view
, int gp_offset
, unsigned int r_type
)
4747 mips_reloc_unshuffle(view
, r_type
, false);
4748 Valtype32
* wv
= reinterpret_cast<Valtype32
*>(view
);
4749 Valtype32 val
= elfcpp::Swap
<32, big_endian
>::readval(wv
);
4750 Valtype32 x
= gp_offset
;
4751 val
= Bits
<32>::bit_select32(val
, x
, 0xffff);
4752 elfcpp::Swap
<32, big_endian
>::writeval(wv
, val
);
4753 mips_reloc_shuffle(view
, r_type
, false);
4754 return This::STATUS_OKAY
;
4757 // R_MIPS_GPREL16, R_MIPS16_GPREL, R_MIPS_LITERAL, R_MICROMIPS_LITERAL
4758 // R_MICROMIPS_GPREL7_S2, R_MICROMIPS_GPREL16
4759 static inline typename
This::Status
4760 relgprel(unsigned char* view
, const Mips_relobj
<size
, big_endian
>* object
,
4761 const Symbol_value
<size
>* psymval
, Mips_address gp
,
4762 Mips_address addend_a
, bool extract_addend
, bool local
,
4763 unsigned int r_type
)
4765 mips_reloc_unshuffle(view
, r_type
, false);
4766 Valtype32
* wv
= reinterpret_cast<Valtype32
*>(view
);
4767 Valtype32 val
= elfcpp::Swap
<32, big_endian
>::readval(wv
);
4772 if (r_type
== elfcpp::R_MICROMIPS_GPREL7_S2
)
4773 addend
= (val
& 0x7f) << 2;
4775 addend
= val
& 0xffff;
4776 // Only sign-extend the addend if it was extracted from the
4777 // instruction. If the addend was separate, leave it alone,
4778 // otherwise we may lose significant bits.
4779 addend
= Bits
<16>::sign_extend32(addend
);
4784 Valtype32 x
= psymval
->value(object
, addend
) - gp
;
4786 // If the symbol was local, any earlier relocatable links will
4787 // have adjusted its addend with the gp offset, so compensate
4788 // for that now. Don't do it for symbols forced local in this
4789 // link, though, since they won't have had the gp offset applied
4792 x
+= object
->gp_value();
4794 if (r_type
== elfcpp::R_MICROMIPS_GPREL7_S2
)
4795 val
= Bits
<32>::bit_select32(val
, x
, 0x7f);
4797 val
= Bits
<32>::bit_select32(val
, x
, 0xffff);
4798 elfcpp::Swap
<32, big_endian
>::writeval(wv
, val
);
4799 mips_reloc_shuffle(view
, r_type
, false);
4800 if (Bits
<16>::has_overflow32(x
))
4802 gold_error(_("small-data section exceeds 64KB; lower small-data size "
4803 "limit (see option -G)"));
4804 return This::STATUS_OVERFLOW
;
4806 return This::STATUS_OKAY
;
4810 static inline typename
This::Status
4811 relgprel32(unsigned char* view
, const Mips_relobj
<size
, big_endian
>* object
,
4812 const Symbol_value
<size
>* psymval
, Mips_address gp
,
4813 Mips_address addend_a
, bool extract_addend
, unsigned int r_type
)
4815 mips_reloc_unshuffle(view
, r_type
, false);
4816 Valtype32
* wv
= reinterpret_cast<Valtype32
*>(view
);
4817 Valtype32 val
= elfcpp::Swap
<32, big_endian
>::readval(wv
);
4818 Valtype32 addend
= extract_addend
? val
: addend_a
;
4820 // R_MIPS_GPREL32 relocations are defined for local symbols only.
4821 Valtype32 x
= psymval
->value(object
, addend
) + object
->gp_value() - gp
;
4822 elfcpp::Swap
<32, big_endian
>::writeval(wv
, x
);
4823 mips_reloc_shuffle(view
, r_type
, false);
4824 return This::STATUS_OKAY
;
4827 // R_MIPS_TLS_TPREL_HI16, R_MIPS16_TLS_TPREL_HI16, R_MICROMIPS_TLS_TPREL_HI16
4828 // R_MIPS_TLS_DTPREL_HI16, R_MIPS16_TLS_DTPREL_HI16,
4829 // R_MICROMIPS_TLS_DTPREL_HI16
4830 static inline typename
This::Status
4831 tlsrelhi16(unsigned char* view
, const Mips_relobj
<size
, big_endian
>* object
,
4832 const Symbol_value
<size
>* psymval
, Valtype32 tp_offset
,
4833 Mips_address addend_a
, bool extract_addend
, unsigned int r_type
)
4835 mips_reloc_unshuffle(view
, r_type
, false);
4836 Valtype32
* wv
= reinterpret_cast<Valtype32
*>(view
);
4837 Valtype32 val
= elfcpp::Swap
<32, big_endian
>::readval(wv
);
4838 Valtype32 addend
= extract_addend
? val
& 0xffff : addend_a
;
4840 // tls symbol values are relative to tls_segment()->vaddr()
4841 Valtype32 x
= ((psymval
->value(object
, addend
) - tp_offset
) + 0x8000) >> 16;
4842 val
= Bits
<32>::bit_select32(val
, x
, 0xffff);
4843 elfcpp::Swap
<32, big_endian
>::writeval(wv
, val
);
4844 mips_reloc_shuffle(view
, r_type
, false);
4845 return This::STATUS_OKAY
;
4848 // R_MIPS_TLS_TPREL_LO16, R_MIPS16_TLS_TPREL_LO16, R_MICROMIPS_TLS_TPREL_LO16,
4849 // R_MIPS_TLS_DTPREL_LO16, R_MIPS16_TLS_DTPREL_LO16,
4850 // R_MICROMIPS_TLS_DTPREL_LO16,
4851 static inline typename
This::Status
4852 tlsrello16(unsigned char* view
, const Mips_relobj
<size
, big_endian
>* object
,
4853 const Symbol_value
<size
>* psymval
, Valtype32 tp_offset
,
4854 Mips_address addend_a
, bool extract_addend
, unsigned int r_type
)
4856 mips_reloc_unshuffle(view
, r_type
, false);
4857 Valtype32
* wv
= reinterpret_cast<Valtype32
*>(view
);
4858 Valtype32 val
= elfcpp::Swap
<32, big_endian
>::readval(wv
);
4859 Valtype32 addend
= extract_addend
? val
& 0xffff : addend_a
;
4861 // tls symbol values are relative to tls_segment()->vaddr()
4862 Valtype32 x
= psymval
->value(object
, addend
) - tp_offset
;
4863 val
= Bits
<32>::bit_select32(val
, x
, 0xffff);
4864 elfcpp::Swap
<32, big_endian
>::writeval(wv
, val
);
4865 mips_reloc_shuffle(view
, r_type
, false);
4866 return This::STATUS_OKAY
;
4869 // R_MIPS_TLS_TPREL32, R_MIPS_TLS_TPREL64,
4870 // R_MIPS_TLS_DTPREL32, R_MIPS_TLS_DTPREL64
4871 static inline typename
This::Status
4872 tlsrel32(unsigned char* view
, const Mips_relobj
<size
, big_endian
>* object
,
4873 const Symbol_value
<size
>* psymval
, Valtype32 tp_offset
,
4874 Mips_address addend_a
, bool extract_addend
, unsigned int r_type
)
4876 mips_reloc_unshuffle(view
, r_type
, false);
4877 Valtype32
* wv
= reinterpret_cast<Valtype32
*>(view
);
4878 Valtype32 val
= elfcpp::Swap
<32, big_endian
>::readval(wv
);
4879 Valtype32 addend
= extract_addend
? val
: addend_a
;
4881 // tls symbol values are relative to tls_segment()->vaddr()
4882 Valtype32 x
= psymval
->value(object
, addend
) - tp_offset
;
4883 elfcpp::Swap
<32, big_endian
>::writeval(wv
, x
);
4884 mips_reloc_shuffle(view
, r_type
, false);
4885 return This::STATUS_OKAY
;
4888 // R_MIPS_SUB, R_MICROMIPS_SUB
4889 static inline typename
This::Status
4890 relsub(unsigned char* view
, const Mips_relobj
<size
, big_endian
>* object
,
4891 const Symbol_value
<size
>* psymval
, Mips_address addend_a
,
4892 bool extract_addend
, unsigned int r_type
)
4894 mips_reloc_unshuffle(view
, r_type
, false);
4895 Valtype32
* wv
= reinterpret_cast<Valtype32
*>(view
);
4896 Valtype32 val
= elfcpp::Swap
<32, big_endian
>::readval(wv
);
4897 Valtype32 addend
= extract_addend
? val
: addend_a
;
4899 Valtype32 x
= psymval
->value(object
, -addend
);
4900 elfcpp::Swap
<32, big_endian
>::writeval(wv
, x
);
4901 mips_reloc_shuffle(view
, r_type
, false);
4902 return This::STATUS_OKAY
;
4906 template<int size
, bool big_endian
>
4907 typename
std::list
<reloc_high
<size
, big_endian
> >
4908 Mips_relocate_functions
<size
, big_endian
>::hi16_relocs
;
4910 template<int size
, bool big_endian
>
4911 typename
std::list
<reloc_high
<size
, big_endian
> >
4912 Mips_relocate_functions
<size
, big_endian
>::got16_relocs
;
4914 // Mips_got_info methods.
4916 // Reserve GOT entry for a GOT relocation of type R_TYPE against symbol
4917 // SYMNDX + ADDEND, where SYMNDX is a local symbol in section SHNDX in OBJECT.
4919 template<int size
, bool big_endian
>
4921 Mips_got_info
<size
, big_endian
>::record_local_got_symbol(
4922 Mips_relobj
<size
, big_endian
>* object
, unsigned int symndx
,
4923 Mips_address addend
, unsigned int r_type
, unsigned int shndx
)
4925 Mips_got_entry
<size
, big_endian
>* entry
=
4926 new Mips_got_entry
<size
, big_endian
>(object
, symndx
, addend
,
4927 mips_elf_reloc_tls_type(r_type
),
4929 this->record_got_entry(entry
, object
);
4932 // Reserve GOT entry for a GOT relocation of type R_TYPE against MIPS_SYM,
4933 // in OBJECT. FOR_CALL is true if the caller is only interested in
4934 // using the GOT entry for calls. DYN_RELOC is true if R_TYPE is a dynamic
4937 template<int size
, bool big_endian
>
4939 Mips_got_info
<size
, big_endian
>::record_global_got_symbol(
4940 Mips_symbol
<size
>* mips_sym
, Mips_relobj
<size
, big_endian
>* object
,
4941 unsigned int r_type
, bool dyn_reloc
, bool for_call
)
4944 mips_sym
->set_got_not_only_for_calls();
4946 // A global symbol in the GOT must also be in the dynamic symbol table.
4947 if (!mips_sym
->needs_dynsym_entry())
4949 switch (mips_sym
->visibility())
4951 case elfcpp::STV_INTERNAL
:
4952 case elfcpp::STV_HIDDEN
:
4953 mips_sym
->set_is_forced_local();
4956 mips_sym
->set_needs_dynsym_entry();
4961 unsigned char tls_type
= mips_elf_reloc_tls_type(r_type
);
4962 if (tls_type
== GOT_TLS_NONE
)
4963 this->global_got_symbols_
.insert(mips_sym
);
4967 if (mips_sym
->global_got_area() == GGA_NONE
)
4968 mips_sym
->set_global_got_area(GGA_RELOC_ONLY
);
4972 Mips_got_entry
<size
, big_endian
>* entry
=
4973 new Mips_got_entry
<size
, big_endian
>(object
, mips_sym
, tls_type
);
4975 this->record_got_entry(entry
, object
);
4978 // Add ENTRY to master GOT and to OBJECT's GOT.
4980 template<int size
, bool big_endian
>
4982 Mips_got_info
<size
, big_endian
>::record_got_entry(
4983 Mips_got_entry
<size
, big_endian
>* entry
,
4984 Mips_relobj
<size
, big_endian
>* object
)
4986 if (this->got_entries_
.find(entry
) == this->got_entries_
.end())
4987 this->got_entries_
.insert(entry
);
4989 // Create the GOT entry for the OBJECT's GOT.
4990 Mips_got_info
<size
, big_endian
>* g
= object
->get_or_create_got_info();
4991 Mips_got_entry
<size
, big_endian
>* entry2
=
4992 new Mips_got_entry
<size
, big_endian
>(*entry
);
4994 if (g
->got_entries_
.find(entry2
) == g
->got_entries_
.end())
4995 g
->got_entries_
.insert(entry2
);
4998 // Record that OBJECT has a page relocation against symbol SYMNDX and
4999 // that ADDEND is the addend for that relocation.
5000 // This function creates an upper bound on the number of GOT slots
5001 // required; no attempt is made to combine references to non-overridable
5002 // global symbols across multiple input files.
5004 template<int size
, bool big_endian
>
5006 Mips_got_info
<size
, big_endian
>::record_got_page_entry(
5007 Mips_relobj
<size
, big_endian
>* object
, unsigned int symndx
, int addend
)
5009 struct Got_page_range
**range_ptr
, *range
;
5010 int old_pages
, new_pages
;
5012 // Find the Got_page_entry for this symbol.
5013 Got_page_entry
* entry
= new Got_page_entry(object
, symndx
);
5014 typename
Got_page_entry_set::iterator it
=
5015 this->got_page_entries_
.find(entry
);
5016 if (it
!= this->got_page_entries_
.end())
5019 this->got_page_entries_
.insert(entry
);
5021 // Add the same entry to the OBJECT's GOT.
5022 Got_page_entry
* entry2
= NULL
;
5023 Mips_got_info
<size
, big_endian
>* g2
= object
->get_or_create_got_info();
5024 if (g2
->got_page_entries_
.find(entry
) == g2
->got_page_entries_
.end())
5026 entry2
= new Got_page_entry(*entry
);
5027 g2
->got_page_entries_
.insert(entry2
);
5030 // Skip over ranges whose maximum extent cannot share a page entry
5032 range_ptr
= &entry
->ranges
;
5033 while (*range_ptr
&& addend
> (*range_ptr
)->max_addend
+ 0xffff)
5034 range_ptr
= &(*range_ptr
)->next
;
5036 // If we scanned to the end of the list, or found a range whose
5037 // minimum extent cannot share a page entry with ADDEND, create
5038 // a new singleton range.
5040 if (!range
|| addend
< range
->min_addend
- 0xffff)
5042 range
= new Got_page_range();
5043 range
->next
= *range_ptr
;
5044 range
->min_addend
= addend
;
5045 range
->max_addend
= addend
;
5050 ++entry2
->num_pages
;
5051 ++this->page_gotno_
;
5056 // Remember how many pages the old range contributed.
5057 old_pages
= range
->get_max_pages();
5059 // Update the ranges.
5060 if (addend
< range
->min_addend
)
5061 range
->min_addend
= addend
;
5062 else if (addend
> range
->max_addend
)
5064 if (range
->next
&& addend
>= range
->next
->min_addend
- 0xffff)
5066 old_pages
+= range
->next
->get_max_pages();
5067 range
->max_addend
= range
->next
->max_addend
;
5068 range
->next
= range
->next
->next
;
5071 range
->max_addend
= addend
;
5074 // Record any change in the total estimate.
5075 new_pages
= range
->get_max_pages();
5076 if (old_pages
!= new_pages
)
5078 entry
->num_pages
+= new_pages
- old_pages
;
5080 entry2
->num_pages
+= new_pages
- old_pages
;
5081 this->page_gotno_
+= new_pages
- old_pages
;
5082 g2
->page_gotno_
+= new_pages
- old_pages
;
5086 // Create all entries that should be in the local part of the GOT.
5088 template<int size
, bool big_endian
>
5090 Mips_got_info
<size
, big_endian
>::add_local_entries(
5091 Target_mips
<size
, big_endian
>* target
, Layout
* layout
)
5093 Mips_output_data_got
<size
, big_endian
>* got
= target
->got_section();
5094 // First two GOT entries are reserved. The first entry will be filled at
5095 // runtime. The second entry will be used by some runtime loaders.
5096 got
->add_constant(0);
5097 got
->add_constant(target
->mips_elf_gnu_got1_mask());
5099 for (typename
Got_entry_set::iterator
5100 p
= this->got_entries_
.begin();
5101 p
!= this->got_entries_
.end();
5104 Mips_got_entry
<size
, big_endian
>* entry
= *p
;
5105 if (entry
->is_for_local_symbol() && !entry
->is_tls_entry())
5107 got
->add_local(entry
->object(), entry
->symndx(),
5109 unsigned int got_offset
= entry
->object()->local_got_offset(
5110 entry
->symndx(), GOT_TYPE_STANDARD
);
5111 if (got
->multi_got() && this->index_
> 0
5112 && parameters
->options().output_is_position_independent())
5113 target
->rel_dyn_section(layout
)->add_local(entry
->object(),
5114 entry
->symndx(), elfcpp::R_MIPS_REL32
, got
, got_offset
);
5118 this->add_page_entries(target
, layout
);
5120 // Add global entries that should be in the local area.
5121 for (typename
Got_entry_set::iterator
5122 p
= this->got_entries_
.begin();
5123 p
!= this->got_entries_
.end();
5126 Mips_got_entry
<size
, big_endian
>* entry
= *p
;
5127 if (!entry
->is_for_global_symbol())
5130 Mips_symbol
<size
>* mips_sym
= entry
->sym();
5131 if (mips_sym
->global_got_area() == GGA_NONE
&& !entry
->is_tls_entry())
5133 unsigned int got_type
;
5134 if (!got
->multi_got())
5135 got_type
= GOT_TYPE_STANDARD
;
5137 got_type
= GOT_TYPE_STANDARD_MULTIGOT
+ this->index_
;
5138 if (got
->add_global(mips_sym
, got_type
))
5140 mips_sym
->set_global_gotoffset(mips_sym
->got_offset(got_type
));
5141 if (got
->multi_got() && this->index_
> 0
5142 && parameters
->options().output_is_position_independent())
5143 target
->rel_dyn_section(layout
)->add_symbolless_global_addend(
5144 mips_sym
, elfcpp::R_MIPS_REL32
, got
,
5145 mips_sym
->got_offset(got_type
));
5151 // Create GOT page entries.
5153 template<int size
, bool big_endian
>
5155 Mips_got_info
<size
, big_endian
>::add_page_entries(
5156 Target_mips
<size
, big_endian
>* target
, Layout
* layout
)
5158 if (this->page_gotno_
== 0)
5161 Mips_output_data_got
<size
, big_endian
>* got
= target
->got_section();
5162 this->got_page_offset_start_
= got
->add_constant(0);
5163 if (got
->multi_got() && this->index_
> 0
5164 && parameters
->options().output_is_position_independent())
5165 target
->rel_dyn_section(layout
)->add_absolute(elfcpp::R_MIPS_REL32
, got
,
5166 this->got_page_offset_start_
);
5167 int num_entries
= this->page_gotno_
;
5168 unsigned int prev_offset
= this->got_page_offset_start_
;
5169 while (--num_entries
> 0)
5171 unsigned int next_offset
= got
->add_constant(0);
5172 if (got
->multi_got() && this->index_
> 0
5173 && parameters
->options().output_is_position_independent())
5174 target
->rel_dyn_section(layout
)->add_absolute(elfcpp::R_MIPS_REL32
, got
,
5176 gold_assert(next_offset
== prev_offset
+ size
/8);
5177 prev_offset
= next_offset
;
5179 this->got_page_offset_next_
= this->got_page_offset_start_
;
5182 // Create global GOT entries, both GGA_NORMAL and GGA_RELOC_ONLY.
5184 template<int size
, bool big_endian
>
5186 Mips_got_info
<size
, big_endian
>::add_global_entries(
5187 Target_mips
<size
, big_endian
>* target
, Layout
* layout
,
5188 unsigned int non_reloc_only_global_gotno
)
5190 Mips_output_data_got
<size
, big_endian
>* got
= target
->got_section();
5191 // Add GGA_NORMAL entries.
5192 unsigned int count
= 0;
5193 for (typename
Got_entry_set::iterator
5194 p
= this->got_entries_
.begin();
5195 p
!= this->got_entries_
.end();
5198 Mips_got_entry
<size
, big_endian
>* entry
= *p
;
5199 if (!entry
->is_for_global_symbol())
5202 Mips_symbol
<size
>* mips_sym
= entry
->sym();
5203 if (mips_sym
->global_got_area() != GGA_NORMAL
)
5206 unsigned int got_type
;
5207 if (!got
->multi_got())
5208 got_type
= GOT_TYPE_STANDARD
;
5210 // In multi-GOT links, global symbol can be in both primary and
5211 // secondary GOT(s). By creating custom GOT type
5212 // (GOT_TYPE_STANDARD_MULTIGOT + got_index) we ensure that symbol
5213 // is added to secondary GOT(s).
5214 got_type
= GOT_TYPE_STANDARD_MULTIGOT
+ this->index_
;
5215 if (!got
->add_global(mips_sym
, got_type
))
5218 mips_sym
->set_global_gotoffset(mips_sym
->got_offset(got_type
));
5219 if (got
->multi_got() && this->index_
== 0)
5221 if (got
->multi_got() && this->index_
> 0)
5223 if (parameters
->options().output_is_position_independent()
5224 || (!parameters
->doing_static_link()
5225 && mips_sym
->is_from_dynobj() && !mips_sym
->is_undefined()))
5227 target
->rel_dyn_section(layout
)->add_global(
5228 mips_sym
, elfcpp::R_MIPS_REL32
, got
,
5229 mips_sym
->got_offset(got_type
));
5230 got
->add_secondary_got_reloc(mips_sym
->got_offset(got_type
),
5231 elfcpp::R_MIPS_REL32
, mips_sym
);
5236 if (!got
->multi_got() || this->index_
== 0)
5238 if (got
->multi_got())
5240 // We need to allocate space in the primary GOT for GGA_NORMAL entries
5241 // of secondary GOTs, to ensure that GOT offsets of GGA_RELOC_ONLY
5242 // entries correspond to dynamic symbol indexes.
5243 while (count
< non_reloc_only_global_gotno
)
5245 got
->add_constant(0);
5250 // Add GGA_RELOC_ONLY entries.
5251 got
->add_reloc_only_entries();
5255 // Create global GOT entries that should be in the GGA_RELOC_ONLY area.
5257 template<int size
, bool big_endian
>
5259 Mips_got_info
<size
, big_endian
>::add_reloc_only_entries(
5260 Mips_output_data_got
<size
, big_endian
>* got
)
5262 for (typename Unordered_set
<Mips_symbol
<size
>*>::iterator
5263 p
= this->global_got_symbols_
.begin();
5264 p
!= this->global_got_symbols_
.end();
5267 Mips_symbol
<size
>* mips_sym
= *p
;
5268 if (mips_sym
->global_got_area() == GGA_RELOC_ONLY
)
5270 unsigned int got_type
;
5271 if (!got
->multi_got())
5272 got_type
= GOT_TYPE_STANDARD
;
5274 got_type
= GOT_TYPE_STANDARD_MULTIGOT
;
5275 if (got
->add_global(mips_sym
, got_type
))
5276 mips_sym
->set_global_gotoffset(mips_sym
->got_offset(got_type
));
5281 // Create TLS GOT entries.
5283 template<int size
, bool big_endian
>
5285 Mips_got_info
<size
, big_endian
>::add_tls_entries(
5286 Target_mips
<size
, big_endian
>* target
, Layout
* layout
)
5288 Mips_output_data_got
<size
, big_endian
>* got
= target
->got_section();
5289 // Add local tls entries.
5290 for (typename
Got_entry_set::iterator
5291 p
= this->got_entries_
.begin();
5292 p
!= this->got_entries_
.end();
5295 Mips_got_entry
<size
, big_endian
>* entry
= *p
;
5296 if (!entry
->is_tls_entry() || !entry
->is_for_local_symbol())
5299 if (entry
->tls_type() == GOT_TLS_GD
)
5301 unsigned int got_type
= GOT_TYPE_TLS_PAIR
;
5302 unsigned int r_type1
= (size
== 32 ? elfcpp::R_MIPS_TLS_DTPMOD32
5303 : elfcpp::R_MIPS_TLS_DTPMOD64
);
5304 unsigned int r_type2
= (size
== 32 ? elfcpp::R_MIPS_TLS_DTPREL32
5305 : elfcpp::R_MIPS_TLS_DTPREL64
);
5307 if (!parameters
->doing_static_link())
5309 got
->add_local_pair_with_rel(entry
->object(), entry
->symndx(),
5310 entry
->shndx(), got_type
,
5311 target
->rel_dyn_section(layout
),
5313 unsigned int got_offset
=
5314 entry
->object()->local_got_offset(entry
->symndx(), got_type
);
5315 got
->add_static_reloc(got_offset
+ size
/8, r_type2
,
5316 entry
->object(), entry
->symndx());
5320 // We are doing a static link. Mark it as belong to module 1,
5322 unsigned int got_offset
= got
->add_constant(1);
5323 entry
->object()->set_local_got_offset(entry
->symndx(), got_type
,
5325 got
->add_constant(0);
5326 got
->add_static_reloc(got_offset
+ size
/8, r_type2
,
5327 entry
->object(), entry
->symndx());
5330 else if (entry
->tls_type() == GOT_TLS_IE
)
5332 unsigned int got_type
= GOT_TYPE_TLS_OFFSET
;
5333 unsigned int r_type
= (size
== 32 ? elfcpp::R_MIPS_TLS_TPREL32
5334 : elfcpp::R_MIPS_TLS_TPREL64
);
5335 if (!parameters
->doing_static_link())
5336 got
->add_local_with_rel(entry
->object(), entry
->symndx(), got_type
,
5337 target
->rel_dyn_section(layout
), r_type
);
5340 got
->add_local(entry
->object(), entry
->symndx(), got_type
);
5341 unsigned int got_offset
=
5342 entry
->object()->local_got_offset(entry
->symndx(), got_type
);
5343 got
->add_static_reloc(got_offset
, r_type
, entry
->object(),
5347 else if (entry
->tls_type() == GOT_TLS_LDM
)
5349 unsigned int r_type
= (size
== 32 ? elfcpp::R_MIPS_TLS_DTPMOD32
5350 : elfcpp::R_MIPS_TLS_DTPMOD64
);
5351 unsigned int got_offset
;
5352 if (!parameters
->doing_static_link())
5354 got_offset
= got
->add_constant(0);
5355 target
->rel_dyn_section(layout
)->add_local(
5356 entry
->object(), 0, r_type
, got
, got_offset
);
5359 // We are doing a static link. Just mark it as belong to module 1,
5361 got_offset
= got
->add_constant(1);
5363 got
->add_constant(0);
5364 got
->set_tls_ldm_offset(got_offset
, entry
->object());
5370 // Add global tls entries.
5371 for (typename
Got_entry_set::iterator
5372 p
= this->got_entries_
.begin();
5373 p
!= this->got_entries_
.end();
5376 Mips_got_entry
<size
, big_endian
>* entry
= *p
;
5377 if (!entry
->is_tls_entry() || !entry
->is_for_global_symbol())
5380 Mips_symbol
<size
>* mips_sym
= entry
->sym();
5381 if (entry
->tls_type() == GOT_TLS_GD
)
5383 unsigned int got_type
;
5384 if (!got
->multi_got())
5385 got_type
= GOT_TYPE_TLS_PAIR
;
5387 got_type
= GOT_TYPE_TLS_PAIR_MULTIGOT
+ this->index_
;
5388 unsigned int r_type1
= (size
== 32 ? elfcpp::R_MIPS_TLS_DTPMOD32
5389 : elfcpp::R_MIPS_TLS_DTPMOD64
);
5390 unsigned int r_type2
= (size
== 32 ? elfcpp::R_MIPS_TLS_DTPREL32
5391 : elfcpp::R_MIPS_TLS_DTPREL64
);
5392 if (!parameters
->doing_static_link())
5393 got
->add_global_pair_with_rel(mips_sym
, got_type
,
5394 target
->rel_dyn_section(layout
), r_type1
, r_type2
);
5397 // Add a GOT pair for for R_MIPS_TLS_GD. The creates a pair of
5398 // GOT entries. The first one is initialized to be 1, which is the
5399 // module index for the main executable and the second one 0. A
5400 // reloc of the type R_MIPS_TLS_DTPREL32/64 will be created for
5401 // the second GOT entry and will be applied by gold.
5402 unsigned int got_offset
= got
->add_constant(1);
5403 mips_sym
->set_got_offset(got_type
, got_offset
);
5404 got
->add_constant(0);
5405 got
->add_static_reloc(got_offset
+ size
/8, r_type2
, mips_sym
);
5408 else if (entry
->tls_type() == GOT_TLS_IE
)
5410 unsigned int got_type
;
5411 if (!got
->multi_got())
5412 got_type
= GOT_TYPE_TLS_OFFSET
;
5414 got_type
= GOT_TYPE_TLS_OFFSET_MULTIGOT
+ this->index_
;
5415 unsigned int r_type
= (size
== 32 ? elfcpp::R_MIPS_TLS_TPREL32
5416 : elfcpp::R_MIPS_TLS_TPREL64
);
5417 if (!parameters
->doing_static_link())
5418 got
->add_global_with_rel(mips_sym
, got_type
,
5419 target
->rel_dyn_section(layout
), r_type
);
5422 got
->add_global(mips_sym
, got_type
);
5423 unsigned int got_offset
= mips_sym
->got_offset(got_type
);
5424 got
->add_static_reloc(got_offset
, r_type
, mips_sym
);
5432 // Decide whether the symbol needs an entry in the global part of the primary
5433 // GOT, setting global_got_area accordingly. Count the number of global
5434 // symbols that are in the primary GOT only because they have dynamic
5435 // relocations R_MIPS_REL32 against them (reloc_only_gotno).
5437 template<int size
, bool big_endian
>
5439 Mips_got_info
<size
, big_endian
>::count_got_symbols(Symbol_table
* symtab
)
5441 for (typename Unordered_set
<Mips_symbol
<size
>*>::iterator
5442 p
= this->global_got_symbols_
.begin();
5443 p
!= this->global_got_symbols_
.end();
5446 Mips_symbol
<size
>* sym
= *p
;
5447 // Make a final decision about whether the symbol belongs in the
5448 // local or global GOT. Symbols that bind locally can (and in the
5449 // case of forced-local symbols, must) live in the local GOT.
5450 // Those that are aren't in the dynamic symbol table must also
5451 // live in the local GOT.
5453 if (!sym
->should_add_dynsym_entry(symtab
)
5454 || (sym
->got_only_for_calls()
5455 ? symbol_calls_local(sym
, sym
->should_add_dynsym_entry(symtab
))
5456 : symbol_references_local(sym
,
5457 sym
->should_add_dynsym_entry(symtab
))))
5458 // The symbol belongs in the local GOT. We no longer need this
5459 // entry if it was only used for relocations; those relocations
5460 // will be against the null or section symbol instead.
5461 sym
->set_global_got_area(GGA_NONE
);
5462 else if (sym
->global_got_area() == GGA_RELOC_ONLY
)
5464 ++this->reloc_only_gotno_
;
5465 ++this->global_gotno_
;
5470 // Return the offset of GOT page entry for VALUE. Initialize the entry with
5471 // VALUE if it is not initialized.
5473 template<int size
, bool big_endian
>
5475 Mips_got_info
<size
, big_endian
>::get_got_page_offset(Mips_address value
,
5476 Mips_output_data_got
<size
, big_endian
>* got
)
5478 typename
Got_page_offsets::iterator it
= this->got_page_offsets_
.find(value
);
5479 if (it
!= this->got_page_offsets_
.end())
5482 gold_assert(this->got_page_offset_next_
< this->got_page_offset_start_
5483 + (size
/8) * this->page_gotno_
);
5485 unsigned int got_offset
= this->got_page_offset_next_
;
5486 this->got_page_offsets_
[value
] = got_offset
;
5487 this->got_page_offset_next_
+= size
/8;
5488 got
->update_got_entry(got_offset
, value
);
5492 // Remove lazy-binding stubs for global symbols in this GOT.
5494 template<int size
, bool big_endian
>
5496 Mips_got_info
<size
, big_endian
>::remove_lazy_stubs(
5497 Target_mips
<size
, big_endian
>* target
)
5499 for (typename
Got_entry_set::iterator
5500 p
= this->got_entries_
.begin();
5501 p
!= this->got_entries_
.end();
5504 Mips_got_entry
<size
, big_endian
>* entry
= *p
;
5505 if (entry
->is_for_global_symbol())
5506 target
->remove_lazy_stub_entry(entry
->sym());
5510 // Count the number of GOT entries required.
5512 template<int size
, bool big_endian
>
5514 Mips_got_info
<size
, big_endian
>::count_got_entries()
5516 for (typename
Got_entry_set::iterator
5517 p
= this->got_entries_
.begin();
5518 p
!= this->got_entries_
.end();
5521 this->count_got_entry(*p
);
5525 // Count the number of GOT entries required by ENTRY. Accumulate the result.
5527 template<int size
, bool big_endian
>
5529 Mips_got_info
<size
, big_endian
>::count_got_entry(
5530 Mips_got_entry
<size
, big_endian
>* entry
)
5532 if (entry
->is_tls_entry())
5533 this->tls_gotno_
+= mips_tls_got_entries(entry
->tls_type());
5534 else if (entry
->is_for_local_symbol()
5535 || entry
->sym()->global_got_area() == GGA_NONE
)
5536 ++this->local_gotno_
;
5538 ++this->global_gotno_
;
5541 // Add FROM's GOT entries.
5543 template<int size
, bool big_endian
>
5545 Mips_got_info
<size
, big_endian
>::add_got_entries(
5546 Mips_got_info
<size
, big_endian
>* from
)
5548 for (typename
Got_entry_set::iterator
5549 p
= from
->got_entries_
.begin();
5550 p
!= from
->got_entries_
.end();
5553 Mips_got_entry
<size
, big_endian
>* entry
= *p
;
5554 if (this->got_entries_
.find(entry
) == this->got_entries_
.end())
5556 Mips_got_entry
<size
, big_endian
>* entry2
=
5557 new Mips_got_entry
<size
, big_endian
>(*entry
);
5558 this->got_entries_
.insert(entry2
);
5559 this->count_got_entry(entry
);
5564 // Add FROM's GOT page entries.
5566 template<int size
, bool big_endian
>
5568 Mips_got_info
<size
, big_endian
>::add_got_page_entries(
5569 Mips_got_info
<size
, big_endian
>* from
)
5571 for (typename
Got_page_entry_set::iterator
5572 p
= from
->got_page_entries_
.begin();
5573 p
!= from
->got_page_entries_
.end();
5576 Got_page_entry
* entry
= *p
;
5577 if (this->got_page_entries_
.find(entry
) == this->got_page_entries_
.end())
5579 Got_page_entry
* entry2
= new Got_page_entry(*entry
);
5580 this->got_page_entries_
.insert(entry2
);
5581 this->page_gotno_
+= entry
->num_pages
;
5586 // Mips_output_data_got methods.
5588 // Lay out the GOT. Add local, global and TLS entries. If GOT is
5589 // larger than 64K, create multi-GOT.
5591 template<int size
, bool big_endian
>
5593 Mips_output_data_got
<size
, big_endian
>::lay_out_got(Layout
* layout
,
5594 Symbol_table
* symtab
, const Input_objects
* input_objects
)
5596 // Decide which symbols need to go in the global part of the GOT and
5597 // count the number of reloc-only GOT symbols.
5598 this->master_got_info_
->count_got_symbols(symtab
);
5600 // Count the number of GOT entries.
5601 this->master_got_info_
->count_got_entries();
5603 unsigned int got_size
= this->master_got_info_
->got_size();
5604 if (got_size
> Target_mips
<size
, big_endian
>::MIPS_GOT_MAX_SIZE
)
5605 this->lay_out_multi_got(layout
, input_objects
);
5608 // Record that all objects use single GOT.
5609 for (Input_objects::Relobj_iterator p
= input_objects
->relobj_begin();
5610 p
!= input_objects
->relobj_end();
5613 Mips_relobj
<size
, big_endian
>* object
=
5614 Mips_relobj
<size
, big_endian
>::as_mips_relobj(*p
);
5615 if (object
->get_got_info() != NULL
)
5616 object
->set_got_info(this->master_got_info_
);
5619 this->master_got_info_
->add_local_entries(this->target_
, layout
);
5620 this->master_got_info_
->add_global_entries(this->target_
, layout
,
5622 this->master_got_info_
->add_tls_entries(this->target_
, layout
);
5626 // Create multi-GOT. For every GOT, add local, global and TLS entries.
5628 template<int size
, bool big_endian
>
5630 Mips_output_data_got
<size
, big_endian
>::lay_out_multi_got(Layout
* layout
,
5631 const Input_objects
* input_objects
)
5633 // Try to merge the GOTs of input objects together, as long as they
5634 // don't seem to exceed the maximum GOT size, choosing one of them
5635 // to be the primary GOT.
5636 this->merge_gots(input_objects
);
5638 // Every symbol that is referenced in a dynamic relocation must be
5639 // present in the primary GOT.
5640 this->primary_got_
->set_global_gotno(this->master_got_info_
->global_gotno());
5644 unsigned int offset
= 0;
5645 Mips_got_info
<size
, big_endian
>* g
= this->primary_got_
;
5649 g
->set_offset(offset
);
5651 g
->add_local_entries(this->target_
, layout
);
5653 g
->add_global_entries(this->target_
, layout
,
5654 (this->master_got_info_
->global_gotno()
5655 - this->master_got_info_
->reloc_only_gotno()));
5657 g
->add_global_entries(this->target_
, layout
, /*not used*/-1U);
5658 g
->add_tls_entries(this->target_
, layout
);
5660 // Forbid global symbols in every non-primary GOT from having
5661 // lazy-binding stubs.
5663 g
->remove_lazy_stubs(this->target_
);
5666 offset
+= g
->got_size();
5672 // Attempt to merge GOTs of different input objects. Try to use as much as
5673 // possible of the primary GOT, since it doesn't require explicit dynamic
5674 // relocations, but don't use objects that would reference global symbols
5675 // out of the addressable range. Failing the primary GOT, attempt to merge
5676 // with the current GOT, or finish the current GOT and then make make the new
5679 template<int size
, bool big_endian
>
5681 Mips_output_data_got
<size
, big_endian
>::merge_gots(
5682 const Input_objects
* input_objects
)
5684 gold_assert(this->primary_got_
== NULL
);
5685 Mips_got_info
<size
, big_endian
>* current
= NULL
;
5687 for (Input_objects::Relobj_iterator p
= input_objects
->relobj_begin();
5688 p
!= input_objects
->relobj_end();
5691 Mips_relobj
<size
, big_endian
>* object
=
5692 Mips_relobj
<size
, big_endian
>::as_mips_relobj(*p
);
5694 Mips_got_info
<size
, big_endian
>* g
= object
->get_got_info();
5698 g
->count_got_entries();
5700 // Work out the number of page, local and TLS entries.
5701 unsigned int estimate
= this->master_got_info_
->page_gotno();
5702 if (estimate
> g
->page_gotno())
5703 estimate
= g
->page_gotno();
5704 estimate
+= g
->local_gotno() + g
->tls_gotno();
5706 // We place TLS GOT entries after both locals and globals. The globals
5707 // for the primary GOT may overflow the normal GOT size limit, so be
5708 // sure not to merge a GOT which requires TLS with the primary GOT in that
5709 // case. This doesn't affect non-primary GOTs.
5710 estimate
+= (g
->tls_gotno() > 0 ? this->master_got_info_
->global_gotno()
5711 : g
->global_gotno());
5713 unsigned int max_count
=
5714 Target_mips
<size
, big_endian
>::MIPS_GOT_MAX_SIZE
/ (size
/8) - 2;
5715 if (estimate
<= max_count
)
5717 // If we don't have a primary GOT, use it as
5718 // a starting point for the primary GOT.
5719 if (!this->primary_got_
)
5721 this->primary_got_
= g
;
5725 // Try merging with the primary GOT.
5726 if (this->merge_got_with(g
, object
, this->primary_got_
))
5730 // If we can merge with the last-created GOT, do it.
5731 if (current
&& this->merge_got_with(g
, object
, current
))
5734 // Well, we couldn't merge, so create a new GOT. Don't check if it
5735 // fits; if it turns out that it doesn't, we'll get relocation
5736 // overflows anyway.
5737 g
->set_next(current
);
5741 // If we do not find any suitable primary GOT, create an empty one.
5742 if (this->primary_got_
== NULL
)
5743 this->primary_got_
= new Mips_got_info
<size
, big_endian
>();
5745 // Link primary GOT with secondary GOTs.
5746 this->primary_got_
->set_next(current
);
5749 // Consider merging FROM, which is OBJECT's GOT, into TO. Return false if
5750 // this would lead to overflow, true if they were merged successfully.
5752 template<int size
, bool big_endian
>
5754 Mips_output_data_got
<size
, big_endian
>::merge_got_with(
5755 Mips_got_info
<size
, big_endian
>* from
,
5756 Mips_relobj
<size
, big_endian
>* object
,
5757 Mips_got_info
<size
, big_endian
>* to
)
5759 // Work out how many page entries we would need for the combined GOT.
5760 unsigned int estimate
= this->master_got_info_
->page_gotno();
5761 if (estimate
>= from
->page_gotno() + to
->page_gotno())
5762 estimate
= from
->page_gotno() + to
->page_gotno();
5764 // Conservatively estimate how many local and TLS entries would be needed.
5765 estimate
+= from
->local_gotno() + to
->local_gotno();
5766 estimate
+= from
->tls_gotno() + to
->tls_gotno();
5768 // If we're merging with the primary got, any TLS relocations will
5769 // come after the full set of global entries. Otherwise estimate those
5770 // conservatively as well.
5771 if (to
== this->primary_got_
&& (from
->tls_gotno() + to
->tls_gotno()) > 0)
5772 estimate
+= this->master_got_info_
->global_gotno();
5774 estimate
+= from
->global_gotno() + to
->global_gotno();
5776 // Bail out if the combined GOT might be too big.
5777 unsigned int max_count
=
5778 Target_mips
<size
, big_endian
>::MIPS_GOT_MAX_SIZE
/ (size
/8) - 2;
5779 if (estimate
> max_count
)
5782 // Transfer the object's GOT information from FROM to TO.
5783 to
->add_got_entries(from
);
5784 to
->add_got_page_entries(from
);
5786 // Record that OBJECT should use output GOT TO.
5787 object
->set_got_info(to
);
5792 // Write out the GOT.
5794 template<int size
, bool big_endian
>
5796 Mips_output_data_got
<size
, big_endian
>::do_write(Output_file
* of
)
5798 // Call parent to write out GOT.
5799 Output_data_got
<size
, big_endian
>::do_write(of
);
5801 const off_t offset
= this->offset();
5802 const section_size_type oview_size
=
5803 convert_to_section_size_type(this->data_size());
5804 unsigned char* const oview
= of
->get_output_view(offset
, oview_size
);
5806 // Needed for fixing values of .got section.
5807 this->got_view_
= oview
;
5809 // Write lazy stub addresses.
5810 for (typename Unordered_set
<Mips_symbol
<size
>*>::iterator
5811 p
= this->master_got_info_
->global_got_symbols().begin();
5812 p
!= this->master_got_info_
->global_got_symbols().end();
5815 Mips_symbol
<size
>* mips_sym
= *p
;
5816 if (mips_sym
->has_lazy_stub())
5818 Valtype
* wv
= reinterpret_cast<Valtype
*>(
5819 oview
+ this->get_primary_got_offset(mips_sym
));
5821 this->target_
->mips_stubs_section()->stub_address(mips_sym
);
5822 elfcpp::Swap
<size
, big_endian
>::writeval(wv
, value
);
5826 // Add +1 to GGA_NONE nonzero MIPS16 and microMIPS entries.
5827 for (typename Unordered_set
<Mips_symbol
<size
>*>::iterator
5828 p
= this->master_got_info_
->global_got_symbols().begin();
5829 p
!= this->master_got_info_
->global_got_symbols().end();
5832 Mips_symbol
<size
>* mips_sym
= *p
;
5833 if (!this->multi_got()
5834 && (mips_sym
->is_mips16() || mips_sym
->is_micromips())
5835 && mips_sym
->global_got_area() == GGA_NONE
5836 && mips_sym
->has_got_offset(GOT_TYPE_STANDARD
))
5838 Valtype
* wv
= reinterpret_cast<Valtype
*>(
5839 oview
+ mips_sym
->got_offset(GOT_TYPE_STANDARD
));
5840 Valtype value
= elfcpp::Swap
<size
, big_endian
>::readval(wv
);
5844 elfcpp::Swap
<size
, big_endian
>::writeval(wv
, value
);
5849 if (!this->secondary_got_relocs_
.empty())
5851 // Fixup for the secondary GOT R_MIPS_REL32 relocs. For global
5852 // secondary GOT entries with non-zero initial value copy the value
5853 // to the corresponding primary GOT entry, and set the secondary GOT
5855 // TODO(sasa): This is workaround. It needs to be investigated further.
5857 for (size_t i
= 0; i
< this->secondary_got_relocs_
.size(); ++i
)
5859 Static_reloc
& reloc(this->secondary_got_relocs_
[i
]);
5860 if (reloc
.symbol_is_global())
5862 Mips_symbol
<size
>* gsym
= reloc
.symbol();
5863 gold_assert(gsym
!= NULL
);
5865 unsigned got_offset
= reloc
.got_offset();
5866 gold_assert(got_offset
< oview_size
);
5868 // Find primary GOT entry.
5869 Valtype
* wv_prim
= reinterpret_cast<Valtype
*>(
5870 oview
+ this->get_primary_got_offset(gsym
));
5872 // Find secondary GOT entry.
5873 Valtype
* wv_sec
= reinterpret_cast<Valtype
*>(oview
+ got_offset
);
5875 Valtype value
= elfcpp::Swap
<size
, big_endian
>::readval(wv_sec
);
5878 elfcpp::Swap
<size
, big_endian
>::writeval(wv_prim
, value
);
5879 elfcpp::Swap
<size
, big_endian
>::writeval(wv_sec
, 0);
5880 gsym
->set_applied_secondary_got_fixup();
5885 of
->write_output_view(offset
, oview_size
, oview
);
5888 // We are done if there is no fix up.
5889 if (this->static_relocs_
.empty())
5892 Output_segment
* tls_segment
= this->layout_
->tls_segment();
5893 gold_assert(tls_segment
!= NULL
);
5895 for (size_t i
= 0; i
< this->static_relocs_
.size(); ++i
)
5897 Static_reloc
& reloc(this->static_relocs_
[i
]);
5900 if (!reloc
.symbol_is_global())
5902 Sized_relobj_file
<size
, big_endian
>* object
= reloc
.relobj();
5903 const Symbol_value
<size
>* psymval
=
5904 object
->local_symbol(reloc
.index());
5906 // We are doing static linking. Issue an error and skip this
5907 // relocation if the symbol is undefined or in a discarded_section.
5909 unsigned int shndx
= psymval
->input_shndx(&is_ordinary
);
5910 if ((shndx
== elfcpp::SHN_UNDEF
)
5912 && shndx
!= elfcpp::SHN_UNDEF
5913 && !object
->is_section_included(shndx
)
5914 && !this->symbol_table_
->is_section_folded(object
, shndx
)))
5916 gold_error(_("undefined or discarded local symbol %u from "
5917 " object %s in GOT"),
5918 reloc
.index(), reloc
.relobj()->name().c_str());
5922 value
= psymval
->value(object
, 0);
5926 const Mips_symbol
<size
>* gsym
= reloc
.symbol();
5927 gold_assert(gsym
!= NULL
);
5929 // We are doing static linking. Issue an error and skip this
5930 // relocation if the symbol is undefined or in a discarded_section
5931 // unless it is a weakly_undefined symbol.
5932 if ((gsym
->is_defined_in_discarded_section() || gsym
->is_undefined())
5933 && !gsym
->is_weak_undefined())
5935 gold_error(_("undefined or discarded symbol %s in GOT"),
5940 if (!gsym
->is_weak_undefined())
5941 value
= gsym
->value();
5946 unsigned got_offset
= reloc
.got_offset();
5947 gold_assert(got_offset
< oview_size
);
5949 Valtype
* wv
= reinterpret_cast<Valtype
*>(oview
+ got_offset
);
5952 switch (reloc
.r_type())
5954 case elfcpp::R_MIPS_TLS_DTPMOD32
:
5955 case elfcpp::R_MIPS_TLS_DTPMOD64
:
5958 case elfcpp::R_MIPS_TLS_DTPREL32
:
5959 case elfcpp::R_MIPS_TLS_DTPREL64
:
5960 x
= value
- elfcpp::DTP_OFFSET
;
5962 case elfcpp::R_MIPS_TLS_TPREL32
:
5963 case elfcpp::R_MIPS_TLS_TPREL64
:
5964 x
= value
- elfcpp::TP_OFFSET
;
5971 elfcpp::Swap
<size
, big_endian
>::writeval(wv
, x
);
5974 of
->write_output_view(offset
, oview_size
, oview
);
5977 // Mips_relobj methods.
5979 // Count the local symbols. The Mips backend needs to know if a symbol
5980 // is a MIPS16 or microMIPS function or not. For global symbols, it is easy
5981 // because the Symbol object keeps the ELF symbol type and st_other field.
5982 // For local symbol it is harder because we cannot access this information.
5983 // So we override the do_count_local_symbol in parent and scan local symbols to
5984 // mark MIPS16 and microMIPS functions. This is not the most efficient way but
5985 // I do not want to slow down other ports by calling a per symbol target hook
5986 // inside Sized_relobj_file<size, big_endian>::do_count_local_symbols.
5988 template<int size
, bool big_endian
>
5990 Mips_relobj
<size
, big_endian
>::do_count_local_symbols(
5991 Stringpool_template
<char>* pool
,
5992 Stringpool_template
<char>* dynpool
)
5994 // Ask parent to count the local symbols.
5995 Sized_relobj_file
<size
, big_endian
>::do_count_local_symbols(pool
, dynpool
);
5996 const unsigned int loccount
= this->local_symbol_count();
6000 // Initialize the mips16 and micromips function bit-vector.
6001 this->local_symbol_is_mips16_
.resize(loccount
, false);
6002 this->local_symbol_is_micromips_
.resize(loccount
, false);
6004 // Read the symbol table section header.
6005 const unsigned int symtab_shndx
= this->symtab_shndx();
6006 elfcpp::Shdr
<size
, big_endian
>
6007 symtabshdr(this, this->elf_file()->section_header(symtab_shndx
));
6008 gold_assert(symtabshdr
.get_sh_type() == elfcpp::SHT_SYMTAB
);
6010 // Read the local symbols.
6011 const int sym_size
= elfcpp::Elf_sizes
<size
>::sym_size
;
6012 gold_assert(loccount
== symtabshdr
.get_sh_info());
6013 off_t locsize
= loccount
* sym_size
;
6014 const unsigned char* psyms
= this->get_view(symtabshdr
.get_sh_offset(),
6015 locsize
, true, true);
6017 // Loop over the local symbols and mark any MIPS16 or microMIPS local symbols.
6019 // Skip the first dummy symbol.
6021 for (unsigned int i
= 1; i
< loccount
; ++i
, psyms
+= sym_size
)
6023 elfcpp::Sym
<size
, big_endian
> sym(psyms
);
6024 unsigned char st_other
= sym
.get_st_other();
6025 this->local_symbol_is_mips16_
[i
] = elfcpp::elf_st_is_mips16(st_other
);
6026 this->local_symbol_is_micromips_
[i
] =
6027 elfcpp::elf_st_is_micromips(st_other
);
6031 // Read the symbol information.
6033 template<int size
, bool big_endian
>
6035 Mips_relobj
<size
, big_endian
>::do_read_symbols(Read_symbols_data
* sd
)
6037 // Call parent class to read symbol information.
6038 this->base_read_symbols(sd
);
6040 // Read processor-specific flags in ELF file header.
6041 const unsigned char* pehdr
= this->get_view(elfcpp::file_header_offset
,
6042 elfcpp::Elf_sizes
<size
>::ehdr_size
,
6044 elfcpp::Ehdr
<size
, big_endian
> ehdr(pehdr
);
6045 this->processor_specific_flags_
= ehdr
.get_e_flags();
6047 // Get the section names.
6048 const unsigned char* pnamesu
= sd
->section_names
->data();
6049 const char* pnames
= reinterpret_cast<const char*>(pnamesu
);
6051 // Initialize the mips16 stub section bit-vectors.
6052 this->section_is_mips16_fn_stub_
.resize(this->shnum(), false);
6053 this->section_is_mips16_call_stub_
.resize(this->shnum(), false);
6054 this->section_is_mips16_call_fp_stub_
.resize(this->shnum(), false);
6056 const size_t shdr_size
= elfcpp::Elf_sizes
<size
>::shdr_size
;
6057 const unsigned char* pshdrs
= sd
->section_headers
->data();
6058 const unsigned char* ps
= pshdrs
+ shdr_size
;
6059 for (unsigned int i
= 1; i
< this->shnum(); ++i
, ps
+= shdr_size
)
6061 elfcpp::Shdr
<size
, big_endian
> shdr(ps
);
6063 if (shdr
.get_sh_type() == elfcpp::SHT_MIPS_REGINFO
)
6065 // Read the gp value that was used to create this object. We need the
6066 // gp value while processing relocs. The .reginfo section is not used
6067 // in the 64-bit MIPS ELF ABI.
6068 section_offset_type section_offset
= shdr
.get_sh_offset();
6069 section_size_type section_size
=
6070 convert_to_section_size_type(shdr
.get_sh_size());
6071 const unsigned char* view
=
6072 this->get_view(section_offset
, section_size
, true, false);
6074 this->gp_
= elfcpp::Swap
<size
, big_endian
>::readval(view
+ 20);
6076 // Read the rest of .reginfo.
6077 this->gprmask_
= elfcpp::Swap
<size
, big_endian
>::readval(view
);
6078 this->cprmask1_
= elfcpp::Swap
<size
, big_endian
>::readval(view
+ 4);
6079 this->cprmask2_
= elfcpp::Swap
<size
, big_endian
>::readval(view
+ 8);
6080 this->cprmask3_
= elfcpp::Swap
<size
, big_endian
>::readval(view
+ 12);
6081 this->cprmask4_
= elfcpp::Swap
<size
, big_endian
>::readval(view
+ 16);
6084 const char* name
= pnames
+ shdr
.get_sh_name();
6085 this->section_is_mips16_fn_stub_
[i
] = is_prefix_of(".mips16.fn", name
);
6086 this->section_is_mips16_call_stub_
[i
] =
6087 is_prefix_of(".mips16.call.", name
);
6088 this->section_is_mips16_call_fp_stub_
[i
] =
6089 is_prefix_of(".mips16.call.fp.", name
);
6091 if (strcmp(name
, ".pdr") == 0)
6093 gold_assert(this->pdr_shndx_
== -1U);
6094 this->pdr_shndx_
= i
;
6099 // Discard MIPS16 stub secions that are not needed.
6101 template<int size
, bool big_endian
>
6103 Mips_relobj
<size
, big_endian
>::discard_mips16_stub_sections(Symbol_table
* symtab
)
6105 for (typename
Mips16_stubs_int_map::const_iterator
6106 it
= this->mips16_stub_sections_
.begin();
6107 it
!= this->mips16_stub_sections_
.end(); ++it
)
6109 Mips16_stub_section
<size
, big_endian
>* stub_section
= it
->second
;
6110 if (!stub_section
->is_target_found())
6112 gold_error(_("no relocation found in mips16 stub section '%s'"),
6113 stub_section
->object()
6114 ->section_name(stub_section
->shndx()).c_str());
6117 bool discard
= false;
6118 if (stub_section
->is_for_local_function())
6120 if (stub_section
->is_fn_stub())
6122 // This stub is for a local symbol. This stub will only
6123 // be needed if there is some relocation in this object,
6124 // other than a 16 bit function call, which refers to this
6126 if (!this->has_local_non_16bit_call_relocs(stub_section
->r_sym()))
6129 this->add_local_mips16_fn_stub(stub_section
);
6133 // This stub is for a local symbol. This stub will only
6134 // be needed if there is some relocation (R_MIPS16_26) in
6135 // this object that refers to this symbol.
6136 gold_assert(stub_section
->is_call_stub()
6137 || stub_section
->is_call_fp_stub());
6138 if (!this->has_local_16bit_call_relocs(stub_section
->r_sym()))
6141 this->add_local_mips16_call_stub(stub_section
);
6146 Mips_symbol
<size
>* gsym
= stub_section
->gsym();
6147 if (stub_section
->is_fn_stub())
6149 if (gsym
->has_mips16_fn_stub())
6150 // We already have a stub for this function.
6154 gsym
->set_mips16_fn_stub(stub_section
);
6155 if (gsym
->should_add_dynsym_entry(symtab
))
6157 // If we have a MIPS16 function with a stub, the
6158 // dynamic symbol must refer to the stub, since only
6159 // the stub uses the standard calling conventions.
6160 gsym
->set_need_fn_stub();
6161 if (gsym
->is_from_dynobj())
6162 gsym
->set_needs_dynsym_value();
6165 if (!gsym
->need_fn_stub())
6168 else if (stub_section
->is_call_stub())
6170 if (gsym
->is_mips16())
6171 // We don't need the call_stub; this is a 16 bit
6172 // function, so calls from other 16 bit functions are
6175 else if (gsym
->has_mips16_call_stub())
6176 // We already have a stub for this function.
6179 gsym
->set_mips16_call_stub(stub_section
);
6183 gold_assert(stub_section
->is_call_fp_stub());
6184 if (gsym
->is_mips16())
6185 // We don't need the call_stub; this is a 16 bit
6186 // function, so calls from other 16 bit functions are
6189 else if (gsym
->has_mips16_call_fp_stub())
6190 // We already have a stub for this function.
6193 gsym
->set_mips16_call_fp_stub(stub_section
);
6197 this->set_output_section(stub_section
->shndx(), NULL
);
6201 // Mips_output_data_la25_stub methods.
6203 // Template for standard LA25 stub.
6204 template<int size
, bool big_endian
>
6206 Mips_output_data_la25_stub
<size
, big_endian
>::la25_stub_entry
[] =
6208 0x3c190000, // lui $25,%hi(func)
6209 0x08000000, // j func
6210 0x27390000, // add $25,$25,%lo(func)
6214 // Template for microMIPS LA25 stub.
6215 template<int size
, bool big_endian
>
6217 Mips_output_data_la25_stub
<size
, big_endian
>::la25_stub_micromips_entry
[] =
6219 0x41b9, 0x0000, // lui t9,%hi(func)
6220 0xd400, 0x0000, // j func
6221 0x3339, 0x0000, // addiu t9,t9,%lo(func)
6222 0x0000, 0x0000 // nop
6225 // Create la25 stub for a symbol.
6227 template<int size
, bool big_endian
>
6229 Mips_output_data_la25_stub
<size
, big_endian
>::create_la25_stub(
6230 Symbol_table
* symtab
, Target_mips
<size
, big_endian
>* target
,
6231 Mips_symbol
<size
>* gsym
)
6233 if (!gsym
->has_la25_stub())
6235 gsym
->set_la25_stub_offset(this->symbols_
.size() * 16);
6236 this->symbols_
.insert(gsym
);
6237 this->create_stub_symbol(gsym
, symtab
, target
, 16);
6241 // Create a symbol for SYM stub's value and size, to help make the disassembly
6244 template<int size
, bool big_endian
>
6246 Mips_output_data_la25_stub
<size
, big_endian
>::create_stub_symbol(
6247 Mips_symbol
<size
>* sym
, Symbol_table
* symtab
,
6248 Target_mips
<size
, big_endian
>* target
, uint64_t symsize
)
6250 std::string
name(".pic.");
6251 name
+= sym
->name();
6253 unsigned int offset
= sym
->la25_stub_offset();
6254 if (sym
->is_micromips())
6257 // Make it a local function.
6258 Symbol
* new_sym
= symtab
->define_in_output_data(name
.c_str(), NULL
,
6259 Symbol_table::PREDEFINED
,
6260 target
->la25_stub_section(),
6261 offset
, symsize
, elfcpp::STT_FUNC
,
6263 elfcpp::STV_DEFAULT
, 0,
6265 new_sym
->set_is_forced_local();
6268 // Write out la25 stubs. This uses the hand-coded instructions above,
6269 // and adjusts them as needed.
6271 template<int size
, bool big_endian
>
6273 Mips_output_data_la25_stub
<size
, big_endian
>::do_write(Output_file
* of
)
6275 const off_t offset
= this->offset();
6276 const section_size_type oview_size
=
6277 convert_to_section_size_type(this->data_size());
6278 unsigned char* const oview
= of
->get_output_view(offset
, oview_size
);
6280 for (typename Unordered_set
<Mips_symbol
<size
>*>::iterator
6281 p
= this->symbols_
.begin();
6282 p
!= this->symbols_
.end();
6285 Mips_symbol
<size
>* sym
= *p
;
6286 unsigned char* pov
= oview
+ sym
->la25_stub_offset();
6288 Mips_address target
= sym
->value();
6289 if (!sym
->is_micromips())
6291 elfcpp::Swap
<32, big_endian
>::writeval(pov
,
6292 la25_stub_entry
[0] | (((target
+ 0x8000) >> 16) & 0xffff));
6293 elfcpp::Swap
<32, big_endian
>::writeval(pov
+ 4,
6294 la25_stub_entry
[1] | ((target
>> 2) & 0x3ffffff));
6295 elfcpp::Swap
<32, big_endian
>::writeval(pov
+ 8,
6296 la25_stub_entry
[2] | (target
& 0xffff));
6297 elfcpp::Swap
<32, big_endian
>::writeval(pov
+ 12, la25_stub_entry
[3]);
6302 // First stub instruction. Paste high 16-bits of the target.
6303 elfcpp::Swap
<16, big_endian
>::writeval(pov
,
6304 la25_stub_micromips_entry
[0]);
6305 elfcpp::Swap
<16, big_endian
>::writeval(pov
+ 2,
6306 ((target
+ 0x8000) >> 16) & 0xffff);
6307 // Second stub instruction. Paste low 26-bits of the target, shifted
6309 elfcpp::Swap
<16, big_endian
>::writeval(pov
+ 4,
6310 la25_stub_micromips_entry
[2] | ((target
>> 17) & 0x3ff));
6311 elfcpp::Swap
<16, big_endian
>::writeval(pov
+ 6,
6312 la25_stub_micromips_entry
[3] | ((target
>> 1) & 0xffff));
6313 // Third stub instruction. Paste low 16-bits of the target.
6314 elfcpp::Swap
<16, big_endian
>::writeval(pov
+ 8,
6315 la25_stub_micromips_entry
[4]);
6316 elfcpp::Swap
<16, big_endian
>::writeval(pov
+ 10, target
& 0xffff);
6317 // Fourth stub instruction.
6318 elfcpp::Swap
<16, big_endian
>::writeval(pov
+ 12,
6319 la25_stub_micromips_entry
[6]);
6320 elfcpp::Swap
<16, big_endian
>::writeval(pov
+ 14,
6321 la25_stub_micromips_entry
[7]);
6325 of
->write_output_view(offset
, oview_size
, oview
);
6328 // Mips_output_data_plt methods.
6330 // The format of the first PLT entry in an O32 executable.
6331 template<int size
, bool big_endian
>
6332 const uint32_t Mips_output_data_plt
<size
, big_endian
>::plt0_entry_o32
[] =
6334 0x3c1c0000, // lui $28, %hi(&GOTPLT[0])
6335 0x8f990000, // lw $25, %lo(&GOTPLT[0])($28)
6336 0x279c0000, // addiu $28, $28, %lo(&GOTPLT[0])
6337 0x031cc023, // subu $24, $24, $28
6338 0x03e07825, // or $15, $31, zero
6339 0x0018c082, // srl $24, $24, 2
6340 0x0320f809, // jalr $25
6341 0x2718fffe // subu $24, $24, 2
6344 // The format of the first PLT entry in an N32 executable. Different
6345 // because gp ($28) is not available; we use t2 ($14) instead.
6346 template<int size
, bool big_endian
>
6347 const uint32_t Mips_output_data_plt
<size
, big_endian
>::plt0_entry_n32
[] =
6349 0x3c0e0000, // lui $14, %hi(&GOTPLT[0])
6350 0x8dd90000, // lw $25, %lo(&GOTPLT[0])($14)
6351 0x25ce0000, // addiu $14, $14, %lo(&GOTPLT[0])
6352 0x030ec023, // subu $24, $24, $14
6353 0x03e07825, // or $15, $31, zero
6354 0x0018c082, // srl $24, $24, 2
6355 0x0320f809, // jalr $25
6356 0x2718fffe // subu $24, $24, 2
6359 // The format of the first PLT entry in an N64 executable. Different
6360 // from N32 because of the increased size of GOT entries.
6361 template<int size
, bool big_endian
>
6362 const uint32_t Mips_output_data_plt
<size
, big_endian
>::plt0_entry_n64
[] =
6364 0x3c0e0000, // lui $14, %hi(&GOTPLT[0])
6365 0xddd90000, // ld $25, %lo(&GOTPLT[0])($14)
6366 0x25ce0000, // addiu $14, $14, %lo(&GOTPLT[0])
6367 0x030ec023, // subu $24, $24, $14
6368 0x03e07825, // or $15, $31, zero
6369 0x0018c0c2, // srl $24, $24, 3
6370 0x0320f809, // jalr $25
6371 0x2718fffe // subu $24, $24, 2
6374 // The format of the microMIPS first PLT entry in an O32 executable.
6375 // We rely on v0 ($2) rather than t8 ($24) to contain the address
6376 // of the GOTPLT entry handled, so this stub may only be used when
6377 // all the subsequent PLT entries are microMIPS code too.
6379 // The trailing NOP is for alignment and correct disassembly only.
6380 template<int size
, bool big_endian
>
6381 const uint32_t Mips_output_data_plt
<size
, big_endian
>::
6382 plt0_entry_micromips_o32
[] =
6384 0x7980, 0x0000, // addiupc $3, (&GOTPLT[0]) - .
6385 0xff23, 0x0000, // lw $25, 0($3)
6386 0x0535, // subu $2, $2, $3
6387 0x2525, // srl $2, $2, 2
6388 0x3302, 0xfffe, // subu $24, $2, 2
6389 0x0dff, // move $15, $31
6390 0x45f9, // jalrs $25
6391 0x0f83, // move $28, $3
6395 // The format of the microMIPS first PLT entry in an O32 executable
6396 // in the insn32 mode.
6397 template<int size
, bool big_endian
>
6398 const uint32_t Mips_output_data_plt
<size
, big_endian
>::
6399 plt0_entry_micromips32_o32
[] =
6401 0x41bc, 0x0000, // lui $28, %hi(&GOTPLT[0])
6402 0xff3c, 0x0000, // lw $25, %lo(&GOTPLT[0])($28)
6403 0x339c, 0x0000, // addiu $28, $28, %lo(&GOTPLT[0])
6404 0x0398, 0xc1d0, // subu $24, $24, $28
6405 0x001f, 0x7a90, // or $15, $31, zero
6406 0x0318, 0x1040, // srl $24, $24, 2
6407 0x03f9, 0x0f3c, // jalr $25
6408 0x3318, 0xfffe // subu $24, $24, 2
6411 // The format of subsequent standard entries in the PLT.
6412 template<int size
, bool big_endian
>
6413 const uint32_t Mips_output_data_plt
<size
, big_endian
>::plt_entry
[] =
6415 0x3c0f0000, // lui $15, %hi(.got.plt entry)
6416 0x8df90000, // l[wd] $25, %lo(.got.plt entry)($15)
6417 0x03200008, // jr $25
6418 0x25f80000 // addiu $24, $15, %lo(.got.plt entry)
6421 // The format of subsequent MIPS16 o32 PLT entries. We use v1 ($3) as a
6422 // temporary because t8 ($24) and t9 ($25) are not directly addressable.
6423 // Note that this differs from the GNU ld which uses both v0 ($2) and v1 ($3).
6424 // We cannot use v0 because MIPS16 call stubs from the CS toolchain expect
6425 // target function address in register v0.
6426 template<int size
, bool big_endian
>
6427 const uint32_t Mips_output_data_plt
<size
, big_endian
>::plt_entry_mips16_o32
[] =
6429 0xb303, // lw $3, 12($pc)
6430 0x651b, // move $24, $3
6431 0x9b60, // lw $3, 0($3)
6433 0x653b, // move $25, $3
6435 0x0000, 0x0000 // .word (.got.plt entry)
6438 // The format of subsequent microMIPS o32 PLT entries. We use v0 ($2)
6439 // as a temporary because t8 ($24) is not addressable with ADDIUPC.
6440 template<int size
, bool big_endian
>
6441 const uint32_t Mips_output_data_plt
<size
, big_endian
>::
6442 plt_entry_micromips_o32
[] =
6444 0x7900, 0x0000, // addiupc $2, (.got.plt entry) - .
6445 0xff22, 0x0000, // lw $25, 0($2)
6447 0x0f02 // move $24, $2
6450 // The format of subsequent microMIPS o32 PLT entries in the insn32 mode.
6451 template<int size
, bool big_endian
>
6452 const uint32_t Mips_output_data_plt
<size
, big_endian
>::
6453 plt_entry_micromips32_o32
[] =
6455 0x41af, 0x0000, // lui $15, %hi(.got.plt entry)
6456 0xff2f, 0x0000, // lw $25, %lo(.got.plt entry)($15)
6457 0x0019, 0x0f3c, // jr $25
6458 0x330f, 0x0000 // addiu $24, $15, %lo(.got.plt entry)
6461 // Add an entry to the PLT for a symbol referenced by r_type relocation.
6463 template<int size
, bool big_endian
>
6465 Mips_output_data_plt
<size
, big_endian
>::add_entry(Mips_symbol
<size
>* gsym
,
6466 unsigned int r_type
)
6468 gold_assert(!gsym
->has_plt_offset());
6470 // Final PLT offset for a symbol will be set in method set_plt_offsets().
6471 gsym
->set_plt_offset(this->entry_count() * sizeof(plt_entry
)
6472 + sizeof(plt0_entry_o32
));
6473 this->symbols_
.push_back(gsym
);
6475 // Record whether the relocation requires a standard MIPS
6476 // or a compressed code entry.
6477 if (jal_reloc(r_type
))
6479 if (r_type
== elfcpp::R_MIPS_26
)
6480 gsym
->set_needs_mips_plt(true);
6482 gsym
->set_needs_comp_plt(true);
6485 section_offset_type got_offset
= this->got_plt_
->current_data_size();
6487 // Every PLT entry needs a GOT entry which points back to the PLT
6488 // entry (this will be changed by the dynamic linker, normally
6489 // lazily when the function is called).
6490 this->got_plt_
->set_current_data_size(got_offset
+ size
/8);
6492 gsym
->set_needs_dynsym_entry();
6493 this->rel_
->add_global(gsym
, elfcpp::R_MIPS_JUMP_SLOT
, this->got_plt_
,
6497 // Set final PLT offsets. For each symbol, determine whether standard or
6498 // compressed (MIPS16 or microMIPS) PLT entry is used.
6500 template<int size
, bool big_endian
>
6502 Mips_output_data_plt
<size
, big_endian
>::set_plt_offsets()
6504 // The sizes of individual PLT entries.
6505 unsigned int plt_mips_entry_size
= this->standard_plt_entry_size();
6506 unsigned int plt_comp_entry_size
= (!this->target_
->is_output_newabi()
6507 ? this->compressed_plt_entry_size() : 0);
6509 for (typename
std::vector
<Mips_symbol
<size
>*>::const_iterator
6510 p
= this->symbols_
.begin(); p
!= this->symbols_
.end(); ++p
)
6512 Mips_symbol
<size
>* mips_sym
= *p
;
6514 // There are no defined MIPS16 or microMIPS PLT entries for n32 or n64,
6515 // so always use a standard entry there.
6517 // If the symbol has a MIPS16 call stub and gets a PLT entry, then
6518 // all MIPS16 calls will go via that stub, and there is no benefit
6519 // to having a MIPS16 entry. And in the case of call_stub a
6520 // standard entry actually has to be used as the stub ends with a J
6522 if (this->target_
->is_output_newabi()
6523 || mips_sym
->has_mips16_call_stub()
6524 || mips_sym
->has_mips16_call_fp_stub())
6526 mips_sym
->set_needs_mips_plt(true);
6527 mips_sym
->set_needs_comp_plt(false);
6530 // Otherwise, if there are no direct calls to the function, we
6531 // have a free choice of whether to use standard or compressed
6532 // entries. Prefer microMIPS entries if the object is known to
6533 // contain microMIPS code, so that it becomes possible to create
6534 // pure microMIPS binaries. Prefer standard entries otherwise,
6535 // because MIPS16 ones are no smaller and are usually slower.
6536 if (!mips_sym
->needs_mips_plt() && !mips_sym
->needs_comp_plt())
6538 if (this->target_
->is_output_micromips())
6539 mips_sym
->set_needs_comp_plt(true);
6541 mips_sym
->set_needs_mips_plt(true);
6544 if (mips_sym
->needs_mips_plt())
6546 mips_sym
->set_mips_plt_offset(this->plt_mips_offset_
);
6547 this->plt_mips_offset_
+= plt_mips_entry_size
;
6549 if (mips_sym
->needs_comp_plt())
6551 mips_sym
->set_comp_plt_offset(this->plt_comp_offset_
);
6552 this->plt_comp_offset_
+= plt_comp_entry_size
;
6556 // Figure out the size of the PLT header if we know that we are using it.
6557 if (this->plt_mips_offset_
+ this->plt_comp_offset_
!= 0)
6558 this->plt_header_size_
= this->get_plt_header_size();
6561 // Write out the PLT. This uses the hand-coded instructions above,
6562 // and adjusts them as needed.
6564 template<int size
, bool big_endian
>
6566 Mips_output_data_plt
<size
, big_endian
>::do_write(Output_file
* of
)
6568 const off_t offset
= this->offset();
6569 const section_size_type oview_size
=
6570 convert_to_section_size_type(this->data_size());
6571 unsigned char* const oview
= of
->get_output_view(offset
, oview_size
);
6573 const off_t gotplt_file_offset
= this->got_plt_
->offset();
6574 const section_size_type gotplt_size
=
6575 convert_to_section_size_type(this->got_plt_
->data_size());
6576 unsigned char* const gotplt_view
= of
->get_output_view(gotplt_file_offset
,
6578 unsigned char* pov
= oview
;
6580 Mips_address plt_address
= this->address();
6582 // Calculate the address of .got.plt.
6583 Mips_address gotplt_addr
= this->got_plt_
->address();
6584 Mips_address gotplt_addr_high
= ((gotplt_addr
+ 0x8000) >> 16) & 0xffff;
6585 Mips_address gotplt_addr_low
= gotplt_addr
& 0xffff;
6587 // The PLT sequence is not safe for N64 if .got.plt's address can
6588 // not be loaded in two instructions.
6589 gold_assert((gotplt_addr
& ~(Mips_address
) 0x7fffffff) == 0
6590 || ~(gotplt_addr
| 0x7fffffff) == 0);
6592 // Write the PLT header.
6593 const uint32_t* plt0_entry
= this->get_plt_header_entry();
6594 if (plt0_entry
== plt0_entry_micromips_o32
)
6596 // Write microMIPS PLT header.
6597 gold_assert(gotplt_addr
% 4 == 0);
6599 Mips_address gotpc_offset
= gotplt_addr
- ((plt_address
| 3) ^ 3);
6601 // ADDIUPC has a span of +/-16MB, check we're in range.
6602 if (gotpc_offset
+ 0x1000000 >= 0x2000000)
6604 gold_error(_(".got.plt offset of %ld from .plt beyond the range of "
6605 "ADDIUPC"), (long)gotpc_offset
);
6609 elfcpp::Swap
<16, big_endian
>::writeval(pov
,
6610 plt0_entry
[0] | ((gotpc_offset
>> 18) & 0x7f));
6611 elfcpp::Swap
<16, big_endian
>::writeval(pov
+ 2,
6612 (gotpc_offset
>> 2) & 0xffff);
6614 for (unsigned int i
= 2;
6615 i
< (sizeof(plt0_entry_micromips_o32
)
6616 / sizeof(plt0_entry_micromips_o32
[0]));
6619 elfcpp::Swap
<16, big_endian
>::writeval(pov
, plt0_entry
[i
]);
6623 else if (plt0_entry
== plt0_entry_micromips32_o32
)
6625 // Write microMIPS PLT header in insn32 mode.
6626 elfcpp::Swap
<16, big_endian
>::writeval(pov
, plt0_entry
[0]);
6627 elfcpp::Swap
<16, big_endian
>::writeval(pov
+ 2, gotplt_addr_high
);
6628 elfcpp::Swap
<16, big_endian
>::writeval(pov
+ 4, plt0_entry
[2]);
6629 elfcpp::Swap
<16, big_endian
>::writeval(pov
+ 6, gotplt_addr_low
);
6630 elfcpp::Swap
<16, big_endian
>::writeval(pov
+ 8, plt0_entry
[4]);
6631 elfcpp::Swap
<16, big_endian
>::writeval(pov
+ 10, gotplt_addr_low
);
6633 for (unsigned int i
= 6;
6634 i
< (sizeof(plt0_entry_micromips32_o32
)
6635 / sizeof(plt0_entry_micromips32_o32
[0]));
6638 elfcpp::Swap
<16, big_endian
>::writeval(pov
, plt0_entry
[i
]);
6644 // Write standard PLT header.
6645 elfcpp::Swap
<32, big_endian
>::writeval(pov
,
6646 plt0_entry
[0] | gotplt_addr_high
);
6647 elfcpp::Swap
<32, big_endian
>::writeval(pov
+ 4,
6648 plt0_entry
[1] | gotplt_addr_low
);
6649 elfcpp::Swap
<32, big_endian
>::writeval(pov
+ 8,
6650 plt0_entry
[2] | gotplt_addr_low
);
6652 for (int i
= 3; i
< 8; i
++)
6654 elfcpp::Swap
<32, big_endian
>::writeval(pov
, plt0_entry
[i
]);
6660 unsigned char* gotplt_pov
= gotplt_view
;
6661 unsigned int got_entry_size
= size
/8; // TODO(sasa): MIPS_ELF_GOT_SIZE
6663 // The first two entries in .got.plt are reserved.
6664 elfcpp::Swap
<size
, big_endian
>::writeval(gotplt_pov
, 0);
6665 elfcpp::Swap
<size
, big_endian
>::writeval(gotplt_pov
+ got_entry_size
, 0);
6667 unsigned int gotplt_offset
= 2 * got_entry_size
;
6668 gotplt_pov
+= 2 * got_entry_size
;
6670 // Calculate the address of the PLT header.
6671 Mips_address header_address
= (plt_address
6672 + (this->is_plt_header_compressed() ? 1 : 0));
6674 // Initialize compressed PLT area view.
6675 unsigned char* pov2
= pov
+ this->plt_mips_offset_
;
6677 // Write the PLT entries.
6678 for (typename
std::vector
<Mips_symbol
<size
>*>::const_iterator
6679 p
= this->symbols_
.begin();
6680 p
!= this->symbols_
.end();
6681 ++p
, gotplt_pov
+= got_entry_size
, gotplt_offset
+= got_entry_size
)
6683 Mips_symbol
<size
>* mips_sym
= *p
;
6685 // Calculate the address of the .got.plt entry.
6686 uint32_t gotplt_entry_addr
= (gotplt_addr
+ gotplt_offset
);
6687 uint32_t gotplt_entry_addr_hi
= (((gotplt_entry_addr
+ 0x8000) >> 16)
6689 uint32_t gotplt_entry_addr_lo
= gotplt_entry_addr
& 0xffff;
6691 // Initially point the .got.plt entry at the PLT header.
6692 if (this->target_
->is_output_n64())
6693 elfcpp::Swap
<64, big_endian
>::writeval(gotplt_pov
, header_address
);
6695 elfcpp::Swap
<32, big_endian
>::writeval(gotplt_pov
, header_address
);
6697 // Now handle the PLT itself. First the standard entry.
6698 if (mips_sym
->has_mips_plt_offset())
6700 // Pick the load opcode (LW or LD).
6701 uint64_t load
= this->target_
->is_output_n64() ? 0xdc000000
6704 // Fill in the PLT entry itself.
6705 elfcpp::Swap
<32, big_endian
>::writeval(pov
,
6706 plt_entry
[0] | gotplt_entry_addr_hi
);
6707 elfcpp::Swap
<32, big_endian
>::writeval(pov
+ 4,
6708 plt_entry
[1] | gotplt_entry_addr_lo
| load
);
6709 elfcpp::Swap
<32, big_endian
>::writeval(pov
+ 8, plt_entry
[2]);
6710 elfcpp::Swap
<32, big_endian
>::writeval(pov
+ 12,
6711 plt_entry
[3] | gotplt_entry_addr_lo
);
6715 // Now the compressed entry. They come after any standard ones.
6716 if (mips_sym
->has_comp_plt_offset())
6718 if (!this->target_
->is_output_micromips())
6720 // Write MIPS16 PLT entry.
6721 const uint32_t* plt_entry
= plt_entry_mips16_o32
;
6723 elfcpp::Swap
<16, big_endian
>::writeval(pov2
, plt_entry
[0]);
6724 elfcpp::Swap
<16, big_endian
>::writeval(pov2
+ 2, plt_entry
[1]);
6725 elfcpp::Swap
<16, big_endian
>::writeval(pov2
+ 4, plt_entry
[2]);
6726 elfcpp::Swap
<16, big_endian
>::writeval(pov2
+ 6, plt_entry
[3]);
6727 elfcpp::Swap
<16, big_endian
>::writeval(pov2
+ 8, plt_entry
[4]);
6728 elfcpp::Swap
<16, big_endian
>::writeval(pov2
+ 10, plt_entry
[5]);
6729 elfcpp::Swap
<32, big_endian
>::writeval(pov2
+ 12,
6733 else if (this->target_
->use_32bit_micromips_instructions())
6735 // Write microMIPS PLT entry in insn32 mode.
6736 const uint32_t* plt_entry
= plt_entry_micromips32_o32
;
6738 elfcpp::Swap
<16, big_endian
>::writeval(pov2
, plt_entry
[0]);
6739 elfcpp::Swap
<16, big_endian
>::writeval(pov2
+ 2,
6740 gotplt_entry_addr_hi
);
6741 elfcpp::Swap
<16, big_endian
>::writeval(pov2
+ 4, plt_entry
[2]);
6742 elfcpp::Swap
<16, big_endian
>::writeval(pov2
+ 6,
6743 gotplt_entry_addr_lo
);
6744 elfcpp::Swap
<16, big_endian
>::writeval(pov2
+ 8, plt_entry
[4]);
6745 elfcpp::Swap
<16, big_endian
>::writeval(pov2
+ 10, plt_entry
[5]);
6746 elfcpp::Swap
<16, big_endian
>::writeval(pov2
+ 12, plt_entry
[6]);
6747 elfcpp::Swap
<16, big_endian
>::writeval(pov2
+ 14,
6748 gotplt_entry_addr_lo
);
6753 // Write microMIPS PLT entry.
6754 const uint32_t* plt_entry
= plt_entry_micromips_o32
;
6756 gold_assert(gotplt_entry_addr
% 4 == 0);
6758 Mips_address loc_address
= plt_address
+ pov2
- oview
;
6759 int gotpc_offset
= gotplt_entry_addr
- ((loc_address
| 3) ^ 3);
6761 // ADDIUPC has a span of +/-16MB, check we're in range.
6762 if (gotpc_offset
+ 0x1000000 >= 0x2000000)
6764 gold_error(_(".got.plt offset of %ld from .plt beyond the "
6765 "range of ADDIUPC"), (long)gotpc_offset
);
6769 elfcpp::Swap
<16, big_endian
>::writeval(pov2
,
6770 plt_entry
[0] | ((gotpc_offset
>> 18) & 0x7f));
6771 elfcpp::Swap
<16, big_endian
>::writeval(
6772 pov2
+ 2, (gotpc_offset
>> 2) & 0xffff);
6773 elfcpp::Swap
<16, big_endian
>::writeval(pov2
+ 4, plt_entry
[2]);
6774 elfcpp::Swap
<16, big_endian
>::writeval(pov2
+ 6, plt_entry
[3]);
6775 elfcpp::Swap
<16, big_endian
>::writeval(pov2
+ 8, plt_entry
[4]);
6776 elfcpp::Swap
<16, big_endian
>::writeval(pov2
+ 10, plt_entry
[5]);
6782 // Check the number of bytes written for standard entries.
6783 gold_assert(static_cast<section_size_type
>(
6784 pov
- oview
- this->plt_header_size_
) == this->plt_mips_offset_
);
6785 // Check the number of bytes written for compressed entries.
6786 gold_assert((static_cast<section_size_type
>(pov2
- pov
)
6787 == this->plt_comp_offset_
));
6788 // Check the total number of bytes written.
6789 gold_assert(static_cast<section_size_type
>(pov2
- oview
) == oview_size
);
6791 gold_assert(static_cast<section_size_type
>(gotplt_pov
- gotplt_view
)
6794 of
->write_output_view(offset
, oview_size
, oview
);
6795 of
->write_output_view(gotplt_file_offset
, gotplt_size
, gotplt_view
);
6798 // Mips_output_data_mips_stubs methods.
6800 // The format of the lazy binding stub when dynamic symbol count is less than
6801 // 64K, dynamic symbol index is less than 32K, and ABI is not N64.
6802 template<int size
, bool big_endian
>
6804 Mips_output_data_mips_stubs
<size
, big_endian
>::lazy_stub_normal_1
[4] =
6806 0x8f998010, // lw t9,0x8010(gp)
6807 0x03e07825, // or t7,ra,zero
6808 0x0320f809, // jalr t9,ra
6809 0x24180000 // addiu t8,zero,DYN_INDEX sign extended
6812 // The format of the lazy binding stub when dynamic symbol count is less than
6813 // 64K, dynamic symbol index is less than 32K, and ABI is N64.
6814 template<int size
, bool big_endian
>
6816 Mips_output_data_mips_stubs
<size
, big_endian
>::lazy_stub_normal_1_n64
[4] =
6818 0xdf998010, // ld t9,0x8010(gp)
6819 0x03e07825, // or t7,ra,zero
6820 0x0320f809, // jalr t9,ra
6821 0x64180000 // daddiu t8,zero,DYN_INDEX sign extended
6824 // The format of the lazy binding stub when dynamic symbol count is less than
6825 // 64K, dynamic symbol index is between 32K and 64K, and ABI is not N64.
6826 template<int size
, bool big_endian
>
6828 Mips_output_data_mips_stubs
<size
, big_endian
>::lazy_stub_normal_2
[4] =
6830 0x8f998010, // lw t9,0x8010(gp)
6831 0x03e07825, // or t7,ra,zero
6832 0x0320f809, // jalr t9,ra
6833 0x34180000 // ori t8,zero,DYN_INDEX unsigned
6836 // The format of the lazy binding stub when dynamic symbol count is less than
6837 // 64K, dynamic symbol index is between 32K and 64K, and ABI is N64.
6838 template<int size
, bool big_endian
>
6840 Mips_output_data_mips_stubs
<size
, big_endian
>::lazy_stub_normal_2_n64
[4] =
6842 0xdf998010, // ld t9,0x8010(gp)
6843 0x03e07825, // or t7,ra,zero
6844 0x0320f809, // jalr t9,ra
6845 0x34180000 // ori t8,zero,DYN_INDEX unsigned
6848 // The format of the lazy binding stub when dynamic symbol count is greater than
6849 // 64K, and ABI is not N64.
6850 template<int size
, bool big_endian
>
6851 const uint32_t Mips_output_data_mips_stubs
<size
, big_endian
>::lazy_stub_big
[5] =
6853 0x8f998010, // lw t9,0x8010(gp)
6854 0x03e07825, // or t7,ra,zero
6855 0x3c180000, // lui t8,DYN_INDEX
6856 0x0320f809, // jalr t9,ra
6857 0x37180000 // ori t8,t8,DYN_INDEX
6860 // The format of the lazy binding stub when dynamic symbol count is greater than
6861 // 64K, and ABI is N64.
6862 template<int size
, bool big_endian
>
6864 Mips_output_data_mips_stubs
<size
, big_endian
>::lazy_stub_big_n64
[5] =
6866 0xdf998010, // ld t9,0x8010(gp)
6867 0x03e07825, // or t7,ra,zero
6868 0x3c180000, // lui t8,DYN_INDEX
6869 0x0320f809, // jalr t9,ra
6870 0x37180000 // ori t8,t8,DYN_INDEX
6875 // The format of the microMIPS lazy binding stub when dynamic symbol count is
6876 // less than 64K, dynamic symbol index is less than 32K, and ABI is not N64.
6877 template<int size
, bool big_endian
>
6879 Mips_output_data_mips_stubs
<size
, big_endian
>::lazy_stub_micromips_normal_1
[] =
6881 0xff3c, 0x8010, // lw t9,0x8010(gp)
6882 0x0dff, // move t7,ra
6884 0x3300, 0x0000 // addiu t8,zero,DYN_INDEX sign extended
6887 // The format of the microMIPS lazy binding stub when dynamic symbol count is
6888 // less than 64K, dynamic symbol index is less than 32K, and ABI is N64.
6889 template<int size
, bool big_endian
>
6891 Mips_output_data_mips_stubs
<size
, big_endian
>::
6892 lazy_stub_micromips_normal_1_n64
[] =
6894 0xdf3c, 0x8010, // ld t9,0x8010(gp)
6895 0x0dff, // move t7,ra
6897 0x5f00, 0x0000 // daddiu t8,zero,DYN_INDEX sign extended
6900 // The format of the microMIPS lazy binding stub when dynamic symbol
6901 // count is less than 64K, dynamic symbol index is between 32K and 64K,
6902 // and ABI is not N64.
6903 template<int size
, bool big_endian
>
6905 Mips_output_data_mips_stubs
<size
, big_endian
>::lazy_stub_micromips_normal_2
[] =
6907 0xff3c, 0x8010, // lw t9,0x8010(gp)
6908 0x0dff, // move t7,ra
6910 0x5300, 0x0000 // ori t8,zero,DYN_INDEX unsigned
6913 // The format of the microMIPS lazy binding stub when dynamic symbol
6914 // count is less than 64K, dynamic symbol index is between 32K and 64K,
6916 template<int size
, bool big_endian
>
6918 Mips_output_data_mips_stubs
<size
, big_endian
>::
6919 lazy_stub_micromips_normal_2_n64
[] =
6921 0xdf3c, 0x8010, // ld t9,0x8010(gp)
6922 0x0dff, // move t7,ra
6924 0x5300, 0x0000 // ori t8,zero,DYN_INDEX unsigned
6927 // The format of the microMIPS lazy binding stub when dynamic symbol count is
6928 // greater than 64K, and ABI is not N64.
6929 template<int size
, bool big_endian
>
6931 Mips_output_data_mips_stubs
<size
, big_endian
>::lazy_stub_micromips_big
[] =
6933 0xff3c, 0x8010, // lw t9,0x8010(gp)
6934 0x0dff, // move t7,ra
6935 0x41b8, 0x0000, // lui t8,DYN_INDEX
6937 0x5318, 0x0000 // ori t8,t8,DYN_INDEX
6940 // The format of the microMIPS lazy binding stub when dynamic symbol count is
6941 // greater than 64K, and ABI is N64.
6942 template<int size
, bool big_endian
>
6944 Mips_output_data_mips_stubs
<size
, big_endian
>::lazy_stub_micromips_big_n64
[] =
6946 0xdf3c, 0x8010, // ld t9,0x8010(gp)
6947 0x0dff, // move t7,ra
6948 0x41b8, 0x0000, // lui t8,DYN_INDEX
6950 0x5318, 0x0000 // ori t8,t8,DYN_INDEX
6953 // 32-bit microMIPS stubs.
6955 // The format of the microMIPS lazy binding stub when dynamic symbol count is
6956 // less than 64K, dynamic symbol index is less than 32K, ABI is not N64, and we
6957 // can use only 32-bit instructions.
6958 template<int size
, bool big_endian
>
6960 Mips_output_data_mips_stubs
<size
, big_endian
>::
6961 lazy_stub_micromips32_normal_1
[] =
6963 0xff3c, 0x8010, // lw t9,0x8010(gp)
6964 0x001f, 0x7a90, // or t7,ra,zero
6965 0x03f9, 0x0f3c, // jalr ra,t9
6966 0x3300, 0x0000 // addiu t8,zero,DYN_INDEX sign extended
6969 // The format of the microMIPS lazy binding stub when dynamic symbol count is
6970 // less than 64K, dynamic symbol index is less than 32K, ABI is N64, and we can
6971 // use only 32-bit instructions.
6972 template<int size
, bool big_endian
>
6974 Mips_output_data_mips_stubs
<size
, big_endian
>::
6975 lazy_stub_micromips32_normal_1_n64
[] =
6977 0xdf3c, 0x8010, // ld t9,0x8010(gp)
6978 0x001f, 0x7a90, // or t7,ra,zero
6979 0x03f9, 0x0f3c, // jalr ra,t9
6980 0x5f00, 0x0000 // daddiu t8,zero,DYN_INDEX sign extended
6983 // The format of the microMIPS lazy binding stub when dynamic symbol
6984 // count is less than 64K, dynamic symbol index is between 32K and 64K,
6985 // ABI is not N64, and we can use only 32-bit instructions.
6986 template<int size
, bool big_endian
>
6988 Mips_output_data_mips_stubs
<size
, big_endian
>::
6989 lazy_stub_micromips32_normal_2
[] =
6991 0xff3c, 0x8010, // lw t9,0x8010(gp)
6992 0x001f, 0x7a90, // or t7,ra,zero
6993 0x03f9, 0x0f3c, // jalr ra,t9
6994 0x5300, 0x0000 // ori t8,zero,DYN_INDEX unsigned
6997 // The format of the microMIPS lazy binding stub when dynamic symbol
6998 // count is less than 64K, dynamic symbol index is between 32K and 64K,
6999 // ABI is N64, and we can use only 32-bit instructions.
7000 template<int size
, bool big_endian
>
7002 Mips_output_data_mips_stubs
<size
, big_endian
>::
7003 lazy_stub_micromips32_normal_2_n64
[] =
7005 0xdf3c, 0x8010, // ld t9,0x8010(gp)
7006 0x001f, 0x7a90, // or t7,ra,zero
7007 0x03f9, 0x0f3c, // jalr ra,t9
7008 0x5300, 0x0000 // ori t8,zero,DYN_INDEX unsigned
7011 // The format of the microMIPS lazy binding stub when dynamic symbol count is
7012 // greater than 64K, ABI is not N64, and we can use only 32-bit instructions.
7013 template<int size
, bool big_endian
>
7015 Mips_output_data_mips_stubs
<size
, big_endian
>::lazy_stub_micromips32_big
[] =
7017 0xff3c, 0x8010, // lw t9,0x8010(gp)
7018 0x001f, 0x7a90, // or t7,ra,zero
7019 0x41b8, 0x0000, // lui t8,DYN_INDEX
7020 0x03f9, 0x0f3c, // jalr ra,t9
7021 0x5318, 0x0000 // ori t8,t8,DYN_INDEX
7024 // The format of the microMIPS lazy binding stub when dynamic symbol count is
7025 // greater than 64K, ABI is N64, and we can use only 32-bit instructions.
7026 template<int size
, bool big_endian
>
7028 Mips_output_data_mips_stubs
<size
, big_endian
>::lazy_stub_micromips32_big_n64
[] =
7030 0xdf3c, 0x8010, // ld t9,0x8010(gp)
7031 0x001f, 0x7a90, // or t7,ra,zero
7032 0x41b8, 0x0000, // lui t8,DYN_INDEX
7033 0x03f9, 0x0f3c, // jalr ra,t9
7034 0x5318, 0x0000 // ori t8,t8,DYN_INDEX
7037 // Create entry for a symbol.
7039 template<int size
, bool big_endian
>
7041 Mips_output_data_mips_stubs
<size
, big_endian
>::make_entry(
7042 Mips_symbol
<size
>* gsym
)
7044 if (!gsym
->has_lazy_stub() && !gsym
->has_plt_offset())
7046 this->symbols_
.insert(gsym
);
7047 gsym
->set_has_lazy_stub(true);
7051 // Remove entry for a symbol.
7053 template<int size
, bool big_endian
>
7055 Mips_output_data_mips_stubs
<size
, big_endian
>::remove_entry(
7056 Mips_symbol
<size
>* gsym
)
7058 if (gsym
->has_lazy_stub())
7060 this->symbols_
.erase(gsym
);
7061 gsym
->set_has_lazy_stub(false);
7065 // Set stub offsets for symbols. This method expects that the number of
7066 // entries in dynamic symbol table is set.
7068 template<int size
, bool big_endian
>
7070 Mips_output_data_mips_stubs
<size
, big_endian
>::set_lazy_stub_offsets()
7072 gold_assert(this->dynsym_count_
!= -1U);
7074 if (this->stub_offsets_are_set_
)
7077 unsigned int stub_size
= this->stub_size();
7078 unsigned int offset
= 0;
7079 for (typename Unordered_set
<Mips_symbol
<size
>*>::const_iterator
7080 p
= this->symbols_
.begin();
7081 p
!= this->symbols_
.end();
7082 ++p
, offset
+= stub_size
)
7084 Mips_symbol
<size
>* mips_sym
= *p
;
7085 mips_sym
->set_lazy_stub_offset(offset
);
7087 this->stub_offsets_are_set_
= true;
7090 template<int size
, bool big_endian
>
7092 Mips_output_data_mips_stubs
<size
, big_endian
>::set_needs_dynsym_value()
7094 for (typename Unordered_set
<Mips_symbol
<size
>*>::const_iterator
7095 p
= this->symbols_
.begin(); p
!= this->symbols_
.end(); ++p
)
7097 Mips_symbol
<size
>* sym
= *p
;
7098 if (sym
->is_from_dynobj())
7099 sym
->set_needs_dynsym_value();
7103 // Write out the .MIPS.stubs. This uses the hand-coded instructions and
7104 // adjusts them as needed.
7106 template<int size
, bool big_endian
>
7108 Mips_output_data_mips_stubs
<size
, big_endian
>::do_write(Output_file
* of
)
7110 const off_t offset
= this->offset();
7111 const section_size_type oview_size
=
7112 convert_to_section_size_type(this->data_size());
7113 unsigned char* const oview
= of
->get_output_view(offset
, oview_size
);
7115 bool big_stub
= this->dynsym_count_
> 0x10000;
7117 unsigned char* pov
= oview
;
7118 for (typename Unordered_set
<Mips_symbol
<size
>*>::const_iterator
7119 p
= this->symbols_
.begin(); p
!= this->symbols_
.end(); ++p
)
7121 Mips_symbol
<size
>* sym
= *p
;
7122 const uint32_t* lazy_stub
;
7123 bool n64
= this->target_
->is_output_n64();
7125 if (!this->target_
->is_output_micromips())
7127 // Write standard (non-microMIPS) stub.
7130 if (sym
->dynsym_index() & ~0x7fff)
7131 // Dynsym index is between 32K and 64K.
7132 lazy_stub
= n64
? lazy_stub_normal_2_n64
: lazy_stub_normal_2
;
7134 // Dynsym index is less than 32K.
7135 lazy_stub
= n64
? lazy_stub_normal_1_n64
: lazy_stub_normal_1
;
7138 lazy_stub
= n64
? lazy_stub_big_n64
: lazy_stub_big
;
7141 elfcpp::Swap
<32, big_endian
>::writeval(pov
, lazy_stub
[i
]);
7142 elfcpp::Swap
<32, big_endian
>::writeval(pov
+ 4, lazy_stub
[i
+ 1]);
7148 // LUI instruction of the big stub. Paste high 16 bits of the
7150 elfcpp::Swap
<32, big_endian
>::writeval(pov
,
7151 lazy_stub
[i
] | ((sym
->dynsym_index() >> 16) & 0x7fff));
7155 elfcpp::Swap
<32, big_endian
>::writeval(pov
, lazy_stub
[i
]);
7156 // Last stub instruction. Paste low 16 bits of the dynsym index.
7157 elfcpp::Swap
<32, big_endian
>::writeval(pov
+ 4,
7158 lazy_stub
[i
+ 1] | (sym
->dynsym_index() & 0xffff));
7161 else if (this->target_
->use_32bit_micromips_instructions())
7163 // Write microMIPS stub in insn32 mode.
7166 if (sym
->dynsym_index() & ~0x7fff)
7167 // Dynsym index is between 32K and 64K.
7168 lazy_stub
= n64
? lazy_stub_micromips32_normal_2_n64
7169 : lazy_stub_micromips32_normal_2
;
7171 // Dynsym index is less than 32K.
7172 lazy_stub
= n64
? lazy_stub_micromips32_normal_1_n64
7173 : lazy_stub_micromips32_normal_1
;
7176 lazy_stub
= n64
? lazy_stub_micromips32_big_n64
7177 : lazy_stub_micromips32_big
;
7180 // First stub instruction. We emit 32-bit microMIPS instructions by
7181 // emitting two 16-bit parts because on microMIPS the 16-bit part of
7182 // the instruction where the opcode is must always come first, for
7183 // both little and big endian.
7184 elfcpp::Swap
<16, big_endian
>::writeval(pov
, lazy_stub
[i
]);
7185 elfcpp::Swap
<16, big_endian
>::writeval(pov
+ 2, lazy_stub
[i
+ 1]);
7186 // Second stub instruction.
7187 elfcpp::Swap
<16, big_endian
>::writeval(pov
+ 4, lazy_stub
[i
+ 2]);
7188 elfcpp::Swap
<16, big_endian
>::writeval(pov
+ 6, lazy_stub
[i
+ 3]);
7193 // LUI instruction of the big stub. Paste high 16 bits of the
7195 elfcpp::Swap
<16, big_endian
>::writeval(pov
, lazy_stub
[i
]);
7196 elfcpp::Swap
<16, big_endian
>::writeval(pov
+ 2,
7197 (sym
->dynsym_index() >> 16) & 0x7fff);
7201 elfcpp::Swap
<16, big_endian
>::writeval(pov
, lazy_stub
[i
]);
7202 elfcpp::Swap
<16, big_endian
>::writeval(pov
+ 2, lazy_stub
[i
+ 1]);
7203 // Last stub instruction. Paste low 16 bits of the dynsym index.
7204 elfcpp::Swap
<16, big_endian
>::writeval(pov
+ 4, lazy_stub
[i
+ 2]);
7205 elfcpp::Swap
<16, big_endian
>::writeval(pov
+ 6,
7206 sym
->dynsym_index() & 0xffff);
7211 // Write microMIPS stub.
7214 if (sym
->dynsym_index() & ~0x7fff)
7215 // Dynsym index is between 32K and 64K.
7216 lazy_stub
= n64
? lazy_stub_micromips_normal_2_n64
7217 : lazy_stub_micromips_normal_2
;
7219 // Dynsym index is less than 32K.
7220 lazy_stub
= n64
? lazy_stub_micromips_normal_1_n64
7221 : lazy_stub_micromips_normal_1
;
7224 lazy_stub
= n64
? lazy_stub_micromips_big_n64
7225 : lazy_stub_micromips_big
;
7228 // First stub instruction. We emit 32-bit microMIPS instructions by
7229 // emitting two 16-bit parts because on microMIPS the 16-bit part of
7230 // the instruction where the opcode is must always come first, for
7231 // both little and big endian.
7232 elfcpp::Swap
<16, big_endian
>::writeval(pov
, lazy_stub
[i
]);
7233 elfcpp::Swap
<16, big_endian
>::writeval(pov
+ 2, lazy_stub
[i
+ 1]);
7234 // Second stub instruction.
7235 elfcpp::Swap
<16, big_endian
>::writeval(pov
+ 4, lazy_stub
[i
+ 2]);
7240 // LUI instruction of the big stub. Paste high 16 bits of the
7242 elfcpp::Swap
<16, big_endian
>::writeval(pov
, lazy_stub
[i
]);
7243 elfcpp::Swap
<16, big_endian
>::writeval(pov
+ 2,
7244 (sym
->dynsym_index() >> 16) & 0x7fff);
7248 elfcpp::Swap
<16, big_endian
>::writeval(pov
, lazy_stub
[i
]);
7249 // Last stub instruction. Paste low 16 bits of the dynsym index.
7250 elfcpp::Swap
<16, big_endian
>::writeval(pov
+ 2, lazy_stub
[i
+ 1]);
7251 elfcpp::Swap
<16, big_endian
>::writeval(pov
+ 4,
7252 sym
->dynsym_index() & 0xffff);
7257 // We always allocate 20 bytes for every stub, because final dynsym count is
7258 // not known in method do_finalize_sections. There are 4 unused bytes per
7259 // stub if final dynsym count is less than 0x10000.
7260 unsigned int used
= pov
- oview
;
7261 unsigned int unused
= big_stub
? 0 : this->symbols_
.size() * 4;
7262 gold_assert(static_cast<section_size_type
>(used
+ unused
) == oview_size
);
7264 // Fill the unused space with zeroes.
7265 // TODO(sasa): Can we strip unused bytes during the relaxation?
7267 memset(pov
, 0, unused
);
7269 of
->write_output_view(offset
, oview_size
, oview
);
7272 // Mips_output_section_reginfo methods.
7274 template<int size
, bool big_endian
>
7276 Mips_output_section_reginfo
<size
, big_endian
>::do_write(Output_file
* of
)
7278 off_t offset
= this->offset();
7279 off_t data_size
= this->data_size();
7281 unsigned char* view
= of
->get_output_view(offset
, data_size
);
7282 elfcpp::Swap
<size
, big_endian
>::writeval(view
, this->gprmask_
);
7283 elfcpp::Swap
<size
, big_endian
>::writeval(view
+ 4, this->cprmask1_
);
7284 elfcpp::Swap
<size
, big_endian
>::writeval(view
+ 8, this->cprmask2_
);
7285 elfcpp::Swap
<size
, big_endian
>::writeval(view
+ 12, this->cprmask3_
);
7286 elfcpp::Swap
<size
, big_endian
>::writeval(view
+ 16, this->cprmask4_
);
7287 // Write the gp value.
7288 elfcpp::Swap
<size
, big_endian
>::writeval(view
+ 20,
7289 this->target_
->gp_value());
7291 of
->write_output_view(offset
, data_size
, view
);
7294 // Mips_copy_relocs methods.
7296 // Emit any saved relocs.
7298 template<int sh_type
, int size
, bool big_endian
>
7300 Mips_copy_relocs
<sh_type
, size
, big_endian
>::emit_mips(
7301 Output_data_reloc
<sh_type
, true, size
, big_endian
>* reloc_section
,
7302 Symbol_table
* symtab
, Layout
* layout
, Target_mips
<size
, big_endian
>* target
)
7304 for (typename Copy_relocs
<sh_type
, size
, big_endian
>::
7305 Copy_reloc_entries::iterator p
= this->entries_
.begin();
7306 p
!= this->entries_
.end();
7308 emit_entry(*p
, reloc_section
, symtab
, layout
, target
);
7310 // We no longer need the saved information.
7311 this->entries_
.clear();
7314 // Emit the reloc if appropriate.
7316 template<int sh_type
, int size
, bool big_endian
>
7318 Mips_copy_relocs
<sh_type
, size
, big_endian
>::emit_entry(
7319 Copy_reloc_entry
& entry
,
7320 Output_data_reloc
<sh_type
, true, size
, big_endian
>* reloc_section
,
7321 Symbol_table
* symtab
, Layout
* layout
, Target_mips
<size
, big_endian
>* target
)
7323 // If the symbol is no longer defined in a dynamic object, then we
7324 // emitted a COPY relocation, and we do not want to emit this
7325 // dynamic relocation.
7326 if (!entry
.sym_
->is_from_dynobj())
7329 bool can_make_dynamic
= (entry
.reloc_type_
== elfcpp::R_MIPS_32
7330 || entry
.reloc_type_
== elfcpp::R_MIPS_REL32
7331 || entry
.reloc_type_
== elfcpp::R_MIPS_64
);
7333 Mips_symbol
<size
>* sym
= Mips_symbol
<size
>::as_mips_sym(entry
.sym_
);
7334 if (can_make_dynamic
&& !sym
->has_static_relocs())
7336 Mips_relobj
<size
, big_endian
>* object
=
7337 Mips_relobj
<size
, big_endian
>::as_mips_relobj(entry
.relobj_
);
7338 target
->got_section(symtab
, layout
)->record_global_got_symbol(
7339 sym
, object
, entry
.reloc_type_
, true, false);
7340 if (!symbol_references_local(sym
, sym
->should_add_dynsym_entry(symtab
)))
7341 target
->rel_dyn_section(layout
)->add_global(sym
, elfcpp::R_MIPS_REL32
,
7342 entry
.output_section_
, entry
.relobj_
, entry
.shndx_
, entry
.address_
);
7344 target
->rel_dyn_section(layout
)->add_symbolless_global_addend(
7345 sym
, elfcpp::R_MIPS_REL32
, entry
.output_section_
, entry
.relobj_
,
7346 entry
.shndx_
, entry
.address_
);
7349 this->make_copy_reloc(symtab
, layout
,
7350 static_cast<Sized_symbol
<size
>*>(entry
.sym_
),
7354 // Target_mips methods.
7356 // Return the value to use for a dynamic symbol which requires special
7357 // treatment. This is how we support equality comparisons of function
7358 // pointers across shared library boundaries, as described in the
7359 // processor specific ABI supplement.
7361 template<int size
, bool big_endian
>
7363 Target_mips
<size
, big_endian
>::do_dynsym_value(const Symbol
* gsym
) const
7366 const Mips_symbol
<size
>* mips_sym
= Mips_symbol
<size
>::as_mips_sym(gsym
);
7368 if (!mips_sym
->has_lazy_stub())
7370 if (mips_sym
->has_plt_offset())
7372 // We distinguish between PLT entries and lazy-binding stubs by
7373 // giving the former an st_other value of STO_MIPS_PLT. Set the
7374 // value to the stub address if there are any relocations in the
7375 // binary where pointer equality matters.
7376 if (mips_sym
->pointer_equality_needed())
7378 // Prefer a standard MIPS PLT entry.
7379 if (mips_sym
->has_mips_plt_offset())
7380 value
= this->plt_section()->mips_entry_address(mips_sym
);
7382 value
= this->plt_section()->comp_entry_address(mips_sym
) + 1;
7390 // First, set stub offsets for symbols. This method expects that the
7391 // number of entries in dynamic symbol table is set.
7392 this->mips_stubs_section()->set_lazy_stub_offsets();
7394 // The run-time linker uses the st_value field of the symbol
7395 // to reset the global offset table entry for this external
7396 // to its stub address when unlinking a shared object.
7397 value
= this->mips_stubs_section()->stub_address(mips_sym
);
7400 if (mips_sym
->has_mips16_fn_stub())
7402 // If we have a MIPS16 function with a stub, the dynamic symbol must
7403 // refer to the stub, since only the stub uses the standard calling
7405 value
= mips_sym
->template
7406 get_mips16_fn_stub
<big_endian
>()->output_address();
7412 // Get the dynamic reloc section, creating it if necessary. It's always
7413 // .rel.dyn, even for MIPS64.
7415 template<int size
, bool big_endian
>
7416 typename Target_mips
<size
, big_endian
>::Reloc_section
*
7417 Target_mips
<size
, big_endian
>::rel_dyn_section(Layout
* layout
)
7419 if (this->rel_dyn_
== NULL
)
7421 gold_assert(layout
!= NULL
);
7422 this->rel_dyn_
= new Reloc_section(parameters
->options().combreloc());
7423 layout
->add_output_section_data(".rel.dyn", elfcpp::SHT_REL
,
7424 elfcpp::SHF_ALLOC
, this->rel_dyn_
,
7425 ORDER_DYNAMIC_RELOCS
, false);
7427 // First entry in .rel.dyn has to be null.
7428 // This is hack - we define dummy output data and set its address to 0,
7429 // and define absolute R_MIPS_NONE relocation with offset 0 against it.
7430 // This ensures that the entry is null.
7431 Output_data
* od
= new Output_data_zero_fill(0, 0);
7433 this->rel_dyn_
->add_absolute(elfcpp::R_MIPS_NONE
, od
, 0);
7435 return this->rel_dyn_
;
7438 // Get the GOT section, creating it if necessary.
7440 template<int size
, bool big_endian
>
7441 Mips_output_data_got
<size
, big_endian
>*
7442 Target_mips
<size
, big_endian
>::got_section(Symbol_table
* symtab
,
7445 if (this->got_
== NULL
)
7447 gold_assert(symtab
!= NULL
&& layout
!= NULL
);
7449 this->got_
= new Mips_output_data_got
<size
, big_endian
>(this, symtab
,
7451 layout
->add_output_section_data(".got", elfcpp::SHT_PROGBITS
,
7452 (elfcpp::SHF_ALLOC
| elfcpp::SHF_WRITE
|
7453 elfcpp::SHF_MIPS_GPREL
),
7454 this->got_
, ORDER_DATA
, false);
7456 // Define _GLOBAL_OFFSET_TABLE_ at the start of the .got section.
7457 symtab
->define_in_output_data("_GLOBAL_OFFSET_TABLE_", NULL
,
7458 Symbol_table::PREDEFINED
,
7460 0, 0, elfcpp::STT_OBJECT
,
7462 elfcpp::STV_DEFAULT
, 0,
7469 // Calculate value of _gp symbol.
7471 template<int size
, bool big_endian
>
7473 Target_mips
<size
, big_endian
>::set_gp(Layout
* layout
, Symbol_table
* symtab
)
7475 if (this->gp_
!= NULL
)
7478 Output_data
* section
= layout
->find_output_section(".got");
7479 if (section
== NULL
)
7481 // If there is no .got section, gp should be based on .sdata.
7482 // TODO(sasa): This is probably not needed. This was needed for older
7483 // MIPS architectures which accessed both GOT and .sdata section using
7484 // gp-relative addressing. Modern Mips Linux ELF architectures don't
7485 // access .sdata using gp-relative addressing.
7486 for (Layout::Section_list::const_iterator
7487 p
= layout
->section_list().begin();
7488 p
!= layout
->section_list().end();
7491 if (strcmp((*p
)->name(), ".sdata") == 0)
7499 Sized_symbol
<size
>* gp
=
7500 static_cast<Sized_symbol
<size
>*>(symtab
->lookup("_gp"));
7503 if (gp
->source() != Symbol::IS_CONSTANT
&& section
!= NULL
)
7504 gp
->init_output_data(gp
->name(), NULL
, section
, MIPS_GP_OFFSET
, 0,
7507 elfcpp::STV_DEFAULT
, 0,
7511 else if (section
!= NULL
)
7513 gp
= static_cast<Sized_symbol
<size
>*>(symtab
->define_in_output_data(
7514 "_gp", NULL
, Symbol_table::PREDEFINED
,
7515 section
, MIPS_GP_OFFSET
, 0,
7518 elfcpp::STV_DEFAULT
,
7524 // Set the dynamic symbol indexes. INDEX is the index of the first
7525 // global dynamic symbol. Pointers to the symbols are stored into the
7526 // vector SYMS. The names are added to DYNPOOL. This returns an
7527 // updated dynamic symbol index.
7529 template<int size
, bool big_endian
>
7531 Target_mips
<size
, big_endian
>::do_set_dynsym_indexes(
7532 std::vector
<Symbol
*>* dyn_symbols
, unsigned int index
,
7533 std::vector
<Symbol
*>* syms
, Stringpool
* dynpool
,
7534 Versions
* versions
, Symbol_table
* symtab
) const
7536 std::vector
<Symbol
*> non_got_symbols
;
7537 std::vector
<Symbol
*> got_symbols
;
7539 reorder_dyn_symbols
<size
, big_endian
>(dyn_symbols
, &non_got_symbols
,
7542 for (std::vector
<Symbol
*>::iterator p
= non_got_symbols
.begin();
7543 p
!= non_got_symbols
.end();
7548 // Note that SYM may already have a dynamic symbol index, since
7549 // some symbols appear more than once in the symbol table, with
7550 // and without a version.
7552 if (!sym
->has_dynsym_index())
7554 sym
->set_dynsym_index(index
);
7556 syms
->push_back(sym
);
7557 dynpool
->add(sym
->name(), false, NULL
);
7559 // Record any version information.
7560 if (sym
->version() != NULL
)
7561 versions
->record_version(symtab
, dynpool
, sym
);
7563 // If the symbol is defined in a dynamic object and is
7564 // referenced in a regular object, then mark the dynamic
7565 // object as needed. This is used to implement --as-needed.
7566 if (sym
->is_from_dynobj() && sym
->in_reg())
7567 sym
->object()->set_is_needed();
7571 for (std::vector
<Symbol
*>::iterator p
= got_symbols
.begin();
7572 p
!= got_symbols
.end();
7576 if (!sym
->has_dynsym_index())
7578 // Record any version information.
7579 if (sym
->version() != NULL
)
7580 versions
->record_version(symtab
, dynpool
, sym
);
7584 index
= versions
->finalize(symtab
, index
, syms
);
7586 int got_sym_count
= 0;
7587 for (std::vector
<Symbol
*>::iterator p
= got_symbols
.begin();
7588 p
!= got_symbols
.end();
7593 if (!sym
->has_dynsym_index())
7596 sym
->set_dynsym_index(index
);
7598 syms
->push_back(sym
);
7599 dynpool
->add(sym
->name(), false, NULL
);
7601 // If the symbol is defined in a dynamic object and is
7602 // referenced in a regular object, then mark the dynamic
7603 // object as needed. This is used to implement --as-needed.
7604 if (sym
->is_from_dynobj() && sym
->in_reg())
7605 sym
->object()->set_is_needed();
7609 // Set index of the first symbol that has .got entry.
7610 this->got_
->set_first_global_got_dynsym_index(
7611 got_sym_count
> 0 ? index
- got_sym_count
: -1U);
7613 if (this->mips_stubs_
!= NULL
)
7614 this->mips_stubs_
->set_dynsym_count(index
);
7619 // Create a PLT entry for a global symbol referenced by r_type relocation.
7621 template<int size
, bool big_endian
>
7623 Target_mips
<size
, big_endian
>::make_plt_entry(Symbol_table
* symtab
,
7625 Mips_symbol
<size
>* gsym
,
7626 unsigned int r_type
)
7628 if (gsym
->has_lazy_stub() || gsym
->has_plt_offset())
7631 if (this->plt_
== NULL
)
7633 // Create the GOT section first.
7634 this->got_section(symtab
, layout
);
7636 this->got_plt_
= new Output_data_space(4, "** GOT PLT");
7637 layout
->add_output_section_data(".got.plt", elfcpp::SHT_PROGBITS
,
7638 (elfcpp::SHF_ALLOC
| elfcpp::SHF_WRITE
),
7639 this->got_plt_
, ORDER_DATA
, false);
7641 // The first two entries are reserved.
7642 this->got_plt_
->set_current_data_size(2 * size
/8);
7644 this->plt_
= new Mips_output_data_plt
<size
, big_endian
>(layout
,
7647 layout
->add_output_section_data(".plt", elfcpp::SHT_PROGBITS
,
7649 | elfcpp::SHF_EXECINSTR
),
7650 this->plt_
, ORDER_PLT
, false);
7653 this->plt_
->add_entry(gsym
, r_type
);
7657 // Get the .MIPS.stubs section, creating it if necessary.
7659 template<int size
, bool big_endian
>
7660 Mips_output_data_mips_stubs
<size
, big_endian
>*
7661 Target_mips
<size
, big_endian
>::mips_stubs_section(Layout
* layout
)
7663 if (this->mips_stubs_
== NULL
)
7666 new Mips_output_data_mips_stubs
<size
, big_endian
>(this);
7667 layout
->add_output_section_data(".MIPS.stubs", elfcpp::SHT_PROGBITS
,
7669 | elfcpp::SHF_EXECINSTR
),
7670 this->mips_stubs_
, ORDER_PLT
, false);
7672 return this->mips_stubs_
;
7675 // Get the LA25 stub section, creating it if necessary.
7677 template<int size
, bool big_endian
>
7678 Mips_output_data_la25_stub
<size
, big_endian
>*
7679 Target_mips
<size
, big_endian
>::la25_stub_section(Layout
* layout
)
7681 if (this->la25_stub_
== NULL
)
7683 this->la25_stub_
= new Mips_output_data_la25_stub
<size
, big_endian
>();
7684 layout
->add_output_section_data(".text", elfcpp::SHT_PROGBITS
,
7686 | elfcpp::SHF_EXECINSTR
),
7687 this->la25_stub_
, ORDER_TEXT
, false);
7689 return this->la25_stub_
;
7692 // Process the relocations to determine unreferenced sections for
7693 // garbage collection.
7695 template<int size
, bool big_endian
>
7697 Target_mips
<size
, big_endian
>::gc_process_relocs(
7698 Symbol_table
* symtab
,
7700 Sized_relobj_file
<size
, big_endian
>* object
,
7701 unsigned int data_shndx
,
7703 const unsigned char* prelocs
,
7705 Output_section
* output_section
,
7706 bool needs_special_offset_handling
,
7707 size_t local_symbol_count
,
7708 const unsigned char* plocal_symbols
)
7710 typedef Target_mips
<size
, big_endian
> Mips
;
7711 typedef Mips_classify_reloc
<elfcpp::SHT_REL
, size
, big_endian
>
7714 gold::gc_process_relocs
<size
, big_endian
, Mips
, Scan
, Classify_reloc
>(
7723 needs_special_offset_handling
,
7728 // Scan relocations for a section.
7730 template<int size
, bool big_endian
>
7732 Target_mips
<size
, big_endian
>::scan_relocs(
7733 Symbol_table
* symtab
,
7735 Sized_relobj_file
<size
, big_endian
>* object
,
7736 unsigned int data_shndx
,
7737 unsigned int sh_type
,
7738 const unsigned char* prelocs
,
7740 Output_section
* output_section
,
7741 bool needs_special_offset_handling
,
7742 size_t local_symbol_count
,
7743 const unsigned char* plocal_symbols
)
7745 typedef Target_mips
<size
, big_endian
> Mips
;
7747 if (sh_type
== elfcpp::SHT_REL
)
7749 typedef Mips_classify_reloc
<elfcpp::SHT_REL
, size
, big_endian
>
7752 gold::scan_relocs
<size
, big_endian
, Mips
, Scan
, Classify_reloc
>(
7761 needs_special_offset_handling
,
7765 else if (sh_type
== elfcpp::SHT_RELA
)
7767 typedef Mips_classify_reloc
<elfcpp::SHT_RELA
, size
, big_endian
>
7770 gold::scan_relocs
<size
, big_endian
, Mips
, Scan
, Classify_reloc
>(
7779 needs_special_offset_handling
,
7785 template<int size
, bool big_endian
>
7787 Target_mips
<size
, big_endian
>::mips_32bit_flags(elfcpp::Elf_Word flags
)
7789 return ((flags
& elfcpp::EF_MIPS_32BITMODE
) != 0
7790 || (flags
& elfcpp::EF_MIPS_ABI
) == elfcpp::E_MIPS_ABI_O32
7791 || (flags
& elfcpp::EF_MIPS_ABI
) == elfcpp::E_MIPS_ABI_EABI32
7792 || (flags
& elfcpp::EF_MIPS_ARCH
) == elfcpp::E_MIPS_ARCH_1
7793 || (flags
& elfcpp::EF_MIPS_ARCH
) == elfcpp::E_MIPS_ARCH_2
7794 || (flags
& elfcpp::EF_MIPS_ARCH
) == elfcpp::E_MIPS_ARCH_32
7795 || (flags
& elfcpp::EF_MIPS_ARCH
) == elfcpp::E_MIPS_ARCH_32R2
);
7798 // Return the MACH for a MIPS e_flags value.
7799 template<int size
, bool big_endian
>
7801 Target_mips
<size
, big_endian
>::elf_mips_mach(elfcpp::Elf_Word flags
)
7803 switch (flags
& elfcpp::EF_MIPS_MACH
)
7805 case elfcpp::E_MIPS_MACH_3900
:
7806 return mach_mips3900
;
7808 case elfcpp::E_MIPS_MACH_4010
:
7809 return mach_mips4010
;
7811 case elfcpp::E_MIPS_MACH_4100
:
7812 return mach_mips4100
;
7814 case elfcpp::E_MIPS_MACH_4111
:
7815 return mach_mips4111
;
7817 case elfcpp::E_MIPS_MACH_4120
:
7818 return mach_mips4120
;
7820 case elfcpp::E_MIPS_MACH_4650
:
7821 return mach_mips4650
;
7823 case elfcpp::E_MIPS_MACH_5400
:
7824 return mach_mips5400
;
7826 case elfcpp::E_MIPS_MACH_5500
:
7827 return mach_mips5500
;
7829 case elfcpp::E_MIPS_MACH_9000
:
7830 return mach_mips9000
;
7832 case elfcpp::E_MIPS_MACH_SB1
:
7833 return mach_mips_sb1
;
7835 case elfcpp::E_MIPS_MACH_LS2E
:
7836 return mach_mips_loongson_2e
;
7838 case elfcpp::E_MIPS_MACH_LS2F
:
7839 return mach_mips_loongson_2f
;
7841 case elfcpp::E_MIPS_MACH_LS3A
:
7842 return mach_mips_loongson_3a
;
7844 case elfcpp::E_MIPS_MACH_OCTEON2
:
7845 return mach_mips_octeon2
;
7847 case elfcpp::E_MIPS_MACH_OCTEON
:
7848 return mach_mips_octeon
;
7850 case elfcpp::E_MIPS_MACH_XLR
:
7851 return mach_mips_xlr
;
7854 switch (flags
& elfcpp::EF_MIPS_ARCH
)
7857 case elfcpp::E_MIPS_ARCH_1
:
7858 return mach_mips3000
;
7860 case elfcpp::E_MIPS_ARCH_2
:
7861 return mach_mips6000
;
7863 case elfcpp::E_MIPS_ARCH_3
:
7864 return mach_mips4000
;
7866 case elfcpp::E_MIPS_ARCH_4
:
7867 return mach_mips8000
;
7869 case elfcpp::E_MIPS_ARCH_5
:
7872 case elfcpp::E_MIPS_ARCH_32
:
7873 return mach_mipsisa32
;
7875 case elfcpp::E_MIPS_ARCH_64
:
7876 return mach_mipsisa64
;
7878 case elfcpp::E_MIPS_ARCH_32R2
:
7879 return mach_mipsisa32r2
;
7881 case elfcpp::E_MIPS_ARCH_64R2
:
7882 return mach_mipsisa64r2
;
7889 // Check whether machine EXTENSION is an extension of machine BASE.
7890 template<int size
, bool big_endian
>
7892 Target_mips
<size
, big_endian
>::mips_mach_extends(unsigned int base
,
7893 unsigned int extension
)
7895 if (extension
== base
)
7898 if ((base
== mach_mipsisa32
)
7899 && this->mips_mach_extends(mach_mipsisa64
, extension
))
7902 if ((base
== mach_mipsisa32r2
)
7903 && this->mips_mach_extends(mach_mipsisa64r2
, extension
))
7906 for (unsigned int i
= 0; i
< this->mips_mach_extensions_
.size(); ++i
)
7907 if (extension
== this->mips_mach_extensions_
[i
].first
)
7909 extension
= this->mips_mach_extensions_
[i
].second
;
7910 if (extension
== base
)
7917 template<int size
, bool big_endian
>
7919 Target_mips
<size
, big_endian
>::merge_processor_specific_flags(
7920 const std::string
& name
, elfcpp::Elf_Word in_flags
,
7921 unsigned char in_ei_class
, bool dyn_obj
)
7923 // If flags are not set yet, just copy them.
7924 if (!this->are_processor_specific_flags_set())
7926 this->set_processor_specific_flags(in_flags
);
7927 this->ei_class_
= in_ei_class
;
7928 this->mach_
= this->elf_mips_mach(in_flags
);
7932 elfcpp::Elf_Word new_flags
= in_flags
;
7933 elfcpp::Elf_Word old_flags
= this->processor_specific_flags();
7934 elfcpp::Elf_Word merged_flags
= this->processor_specific_flags();
7935 merged_flags
|= new_flags
& elfcpp::EF_MIPS_NOREORDER
;
7937 // Check flag compatibility.
7938 new_flags
&= ~elfcpp::EF_MIPS_NOREORDER
;
7939 old_flags
&= ~elfcpp::EF_MIPS_NOREORDER
;
7941 // Some IRIX 6 BSD-compatibility objects have this bit set. It
7942 // doesn't seem to matter.
7943 new_flags
&= ~elfcpp::EF_MIPS_XGOT
;
7944 old_flags
&= ~elfcpp::EF_MIPS_XGOT
;
7946 // MIPSpro generates ucode info in n64 objects. Again, we should
7947 // just be able to ignore this.
7948 new_flags
&= ~elfcpp::EF_MIPS_UCODE
;
7949 old_flags
&= ~elfcpp::EF_MIPS_UCODE
;
7951 // DSOs should only be linked with CPIC code.
7953 new_flags
|= elfcpp::EF_MIPS_PIC
| elfcpp::EF_MIPS_CPIC
;
7955 if (new_flags
== old_flags
)
7957 this->set_processor_specific_flags(merged_flags
);
7961 if (((new_flags
& (elfcpp::EF_MIPS_PIC
| elfcpp::EF_MIPS_CPIC
)) != 0)
7962 != ((old_flags
& (elfcpp::EF_MIPS_PIC
| elfcpp::EF_MIPS_CPIC
)) != 0))
7963 gold_warning(_("%s: linking abicalls files with non-abicalls files"),
7966 if (new_flags
& (elfcpp::EF_MIPS_PIC
| elfcpp::EF_MIPS_CPIC
))
7967 merged_flags
|= elfcpp::EF_MIPS_CPIC
;
7968 if (!(new_flags
& elfcpp::EF_MIPS_PIC
))
7969 merged_flags
&= ~elfcpp::EF_MIPS_PIC
;
7971 new_flags
&= ~(elfcpp::EF_MIPS_PIC
| elfcpp::EF_MIPS_CPIC
);
7972 old_flags
&= ~(elfcpp::EF_MIPS_PIC
| elfcpp::EF_MIPS_CPIC
);
7974 // Compare the ISAs.
7975 if (mips_32bit_flags(old_flags
) != mips_32bit_flags(new_flags
))
7976 gold_error(_("%s: linking 32-bit code with 64-bit code"), name
.c_str());
7977 else if (!this->mips_mach_extends(this->elf_mips_mach(in_flags
), this->mach_
))
7979 // Output ISA isn't the same as, or an extension of, input ISA.
7980 if (this->mips_mach_extends(this->mach_
, this->elf_mips_mach(in_flags
)))
7982 // Copy the architecture info from input object to output. Also copy
7983 // the 32-bit flag (if set) so that we continue to recognise
7984 // output as a 32-bit binary.
7985 this->mach_
= this->elf_mips_mach(in_flags
);
7986 merged_flags
&= ~(elfcpp::EF_MIPS_ARCH
| elfcpp::EF_MIPS_MACH
);
7987 merged_flags
|= (new_flags
& (elfcpp::EF_MIPS_ARCH
7988 | elfcpp::EF_MIPS_MACH
| elfcpp::EF_MIPS_32BITMODE
));
7990 // Copy across the ABI flags if output doesn't use them
7991 // and if that was what caused us to treat input object as 32-bit.
7992 if ((old_flags
& elfcpp::EF_MIPS_ABI
) == 0
7993 && this->mips_32bit_flags(new_flags
)
7994 && !this->mips_32bit_flags(new_flags
& ~elfcpp::EF_MIPS_ABI
))
7995 merged_flags
|= new_flags
& elfcpp::EF_MIPS_ABI
;
7998 // The ISAs aren't compatible.
7999 gold_error(_("%s: linking %s module with previous %s modules"),
8000 name
.c_str(), this->elf_mips_mach_name(in_flags
),
8001 this->elf_mips_mach_name(merged_flags
));
8004 new_flags
&= (~(elfcpp::EF_MIPS_ARCH
| elfcpp::EF_MIPS_MACH
8005 | elfcpp::EF_MIPS_32BITMODE
));
8006 old_flags
&= (~(elfcpp::EF_MIPS_ARCH
| elfcpp::EF_MIPS_MACH
8007 | elfcpp::EF_MIPS_32BITMODE
));
8009 // Compare ABIs. The 64-bit ABI does not use EF_MIPS_ABI. But, it does set
8010 // EI_CLASS differently from any 32-bit ABI.
8011 if ((new_flags
& elfcpp::EF_MIPS_ABI
) != (old_flags
& elfcpp::EF_MIPS_ABI
)
8012 || (in_ei_class
!= this->ei_class_
))
8014 // Only error if both are set (to different values).
8015 if (((new_flags
& elfcpp::EF_MIPS_ABI
)
8016 && (old_flags
& elfcpp::EF_MIPS_ABI
))
8017 || (in_ei_class
!= this->ei_class_
))
8018 gold_error(_("%s: ABI mismatch: linking %s module with "
8019 "previous %s modules"), name
.c_str(),
8020 this->elf_mips_abi_name(in_flags
, in_ei_class
),
8021 this->elf_mips_abi_name(merged_flags
, this->ei_class_
));
8023 new_flags
&= ~elfcpp::EF_MIPS_ABI
;
8024 old_flags
&= ~elfcpp::EF_MIPS_ABI
;
8027 // Compare ASEs. Forbid linking MIPS16 and microMIPS ASE modules together
8028 // and allow arbitrary mixing of the remaining ASEs (retain the union).
8029 if ((new_flags
& elfcpp::EF_MIPS_ARCH_ASE
)
8030 != (old_flags
& elfcpp::EF_MIPS_ARCH_ASE
))
8032 int old_micro
= old_flags
& elfcpp::EF_MIPS_ARCH_ASE_MICROMIPS
;
8033 int new_micro
= new_flags
& elfcpp::EF_MIPS_ARCH_ASE_MICROMIPS
;
8034 int old_m16
= old_flags
& elfcpp::EF_MIPS_ARCH_ASE_M16
;
8035 int new_m16
= new_flags
& elfcpp::EF_MIPS_ARCH_ASE_M16
;
8036 int micro_mis
= old_m16
&& new_micro
;
8037 int m16_mis
= old_micro
&& new_m16
;
8039 if (m16_mis
|| micro_mis
)
8040 gold_error(_("%s: ASE mismatch: linking %s module with "
8041 "previous %s modules"), name
.c_str(),
8042 m16_mis
? "MIPS16" : "microMIPS",
8043 m16_mis
? "microMIPS" : "MIPS16");
8045 merged_flags
|= new_flags
& elfcpp::EF_MIPS_ARCH_ASE
;
8047 new_flags
&= ~ elfcpp::EF_MIPS_ARCH_ASE
;
8048 old_flags
&= ~ elfcpp::EF_MIPS_ARCH_ASE
;
8051 // Warn about any other mismatches.
8052 if (new_flags
!= old_flags
)
8053 gold_error(_("%s: uses different e_flags (0x%x) fields than previous "
8054 "modules (0x%x)"), name
.c_str(), new_flags
, old_flags
);
8056 this->set_processor_specific_flags(merged_flags
);
8059 // Adjust ELF file header.
8061 template<int size
, bool big_endian
>
8063 Target_mips
<size
, big_endian
>::do_adjust_elf_header(
8064 unsigned char* view
,
8067 gold_assert(len
== elfcpp::Elf_sizes
<size
>::ehdr_size
);
8069 elfcpp::Ehdr
<size
, big_endian
> ehdr(view
);
8070 unsigned char e_ident
[elfcpp::EI_NIDENT
];
8071 memcpy(e_ident
, ehdr
.get_e_ident(), elfcpp::EI_NIDENT
);
8073 e_ident
[elfcpp::EI_CLASS
] = this->ei_class_
;
8075 elfcpp::Ehdr_write
<size
, big_endian
> oehdr(view
);
8076 oehdr
.put_e_ident(e_ident
);
8077 if (this->entry_symbol_is_compressed_
)
8078 oehdr
.put_e_entry(ehdr
.get_e_entry() + 1);
8081 // do_make_elf_object to override the same function in the base class.
8082 // We need to use a target-specific sub-class of
8083 // Sized_relobj_file<size, big_endian> to store Mips specific information.
8084 // Hence we need to have our own ELF object creation.
8086 template<int size
, bool big_endian
>
8088 Target_mips
<size
, big_endian
>::do_make_elf_object(
8089 const std::string
& name
,
8090 Input_file
* input_file
,
8091 off_t offset
, const elfcpp::Ehdr
<size
, big_endian
>& ehdr
)
8093 int et
= ehdr
.get_e_type();
8094 // ET_EXEC files are valid input for --just-symbols/-R,
8095 // and we treat them as relocatable objects.
8096 if (et
== elfcpp::ET_REL
8097 || (et
== elfcpp::ET_EXEC
&& input_file
->just_symbols()))
8099 Mips_relobj
<size
, big_endian
>* obj
=
8100 new Mips_relobj
<size
, big_endian
>(name
, input_file
, offset
, ehdr
);
8104 else if (et
== elfcpp::ET_DYN
)
8106 // TODO(sasa): Should we create Mips_dynobj?
8107 return Target::do_make_elf_object(name
, input_file
, offset
, ehdr
);
8111 gold_error(_("%s: unsupported ELF file type %d"),
8117 // Finalize the sections.
8119 template <int size
, bool big_endian
>
8121 Target_mips
<size
, big_endian
>::do_finalize_sections(Layout
* layout
,
8122 const Input_objects
* input_objects
,
8123 Symbol_table
* symtab
)
8125 // Add +1 to MIPS16 and microMIPS init_ and _fini symbols so that DT_INIT and
8126 // DT_FINI have correct values.
8127 Mips_symbol
<size
>* init
= static_cast<Mips_symbol
<size
>*>(
8128 symtab
->lookup(parameters
->options().init()));
8129 if (init
!= NULL
&& (init
->is_mips16() || init
->is_micromips()))
8130 init
->set_value(init
->value() | 1);
8131 Mips_symbol
<size
>* fini
= static_cast<Mips_symbol
<size
>*>(
8132 symtab
->lookup(parameters
->options().fini()));
8133 if (fini
!= NULL
&& (fini
->is_mips16() || fini
->is_micromips()))
8134 fini
->set_value(fini
->value() | 1);
8136 // Check whether the entry symbol is mips16 or micromips. This is needed to
8137 // adjust entry address in ELF header.
8138 Mips_symbol
<size
>* entry
=
8139 static_cast<Mips_symbol
<size
>*>(symtab
->lookup(this->entry_symbol_name()));
8140 this->entry_symbol_is_compressed_
= (entry
!= NULL
&& (entry
->is_mips16()
8141 || entry
->is_micromips()));
8143 if (!parameters
->doing_static_link()
8144 && (strcmp(parameters
->options().hash_style(), "gnu") == 0
8145 || strcmp(parameters
->options().hash_style(), "both") == 0))
8147 // .gnu.hash and the MIPS ABI require .dynsym to be sorted in different
8148 // ways. .gnu.hash needs symbols to be grouped by hash code whereas the
8149 // MIPS ABI requires a mapping between the GOT and the symbol table.
8150 gold_error(".gnu.hash is incompatible with the MIPS ABI");
8153 // Check whether the final section that was scanned has HI16 or GOT16
8154 // relocations without the corresponding LO16 part.
8155 if (this->got16_addends_
.size() > 0)
8156 gold_error("Can't find matching LO16 reloc");
8159 this->set_gp(layout
, symtab
);
8161 // Check for any mips16 stub sections that we can discard.
8162 if (!parameters
->options().relocatable())
8164 for (Input_objects::Relobj_iterator p
= input_objects
->relobj_begin();
8165 p
!= input_objects
->relobj_end();
8168 Mips_relobj
<size
, big_endian
>* object
=
8169 Mips_relobj
<size
, big_endian
>::as_mips_relobj(*p
);
8170 object
->discard_mips16_stub_sections(symtab
);
8174 // Merge processor-specific flags.
8175 for (Input_objects::Relobj_iterator p
= input_objects
->relobj_begin();
8176 p
!= input_objects
->relobj_end();
8179 Mips_relobj
<size
, big_endian
>* relobj
=
8180 Mips_relobj
<size
, big_endian
>::as_mips_relobj(*p
);
8182 Input_file::Format format
= relobj
->input_file()->format();
8183 if (format
== Input_file::FORMAT_ELF
)
8185 // Read processor-specific flags in ELF file header.
8186 const unsigned char* pehdr
= relobj
->get_view(
8187 elfcpp::file_header_offset
,
8188 elfcpp::Elf_sizes
<size
>::ehdr_size
,
8191 elfcpp::Ehdr
<size
, big_endian
> ehdr(pehdr
);
8192 elfcpp::Elf_Word in_flags
= ehdr
.get_e_flags();
8193 unsigned char ei_class
= ehdr
.get_e_ident()[elfcpp::EI_CLASS
];
8195 this->merge_processor_specific_flags(relobj
->name(), in_flags
,
8200 for (Input_objects::Dynobj_iterator p
= input_objects
->dynobj_begin();
8201 p
!= input_objects
->dynobj_end();
8204 Sized_dynobj
<size
, big_endian
>* dynobj
=
8205 static_cast<Sized_dynobj
<size
, big_endian
>*>(*p
);
8207 // Read processor-specific flags.
8208 const unsigned char* pehdr
= dynobj
->get_view(elfcpp::file_header_offset
,
8209 elfcpp::Elf_sizes
<size
>::ehdr_size
,
8212 elfcpp::Ehdr
<size
, big_endian
> ehdr(pehdr
);
8213 elfcpp::Elf_Word in_flags
= ehdr
.get_e_flags();
8214 unsigned char ei_class
= ehdr
.get_e_ident()[elfcpp::EI_CLASS
];
8216 this->merge_processor_specific_flags(dynobj
->name(), in_flags
, ei_class
,
8220 // Merge .reginfo contents of input objects.
8221 Valtype gprmask
= 0;
8222 Valtype cprmask1
= 0;
8223 Valtype cprmask2
= 0;
8224 Valtype cprmask3
= 0;
8225 Valtype cprmask4
= 0;
8226 for (Input_objects::Relobj_iterator p
= input_objects
->relobj_begin();
8227 p
!= input_objects
->relobj_end();
8230 Mips_relobj
<size
, big_endian
>* relobj
=
8231 Mips_relobj
<size
, big_endian
>::as_mips_relobj(*p
);
8233 gprmask
|= relobj
->gprmask();
8234 cprmask1
|= relobj
->cprmask1();
8235 cprmask2
|= relobj
->cprmask2();
8236 cprmask3
|= relobj
->cprmask3();
8237 cprmask4
|= relobj
->cprmask4();
8240 if (this->plt_
!= NULL
)
8242 // Set final PLT offsets for symbols.
8243 this->plt_section()->set_plt_offsets();
8245 // Define _PROCEDURE_LINKAGE_TABLE_ at the start of the .plt section.
8246 // Set STO_MICROMIPS flag if the output has microMIPS code, but only if
8247 // there are no standard PLT entries present.
8248 unsigned char nonvis
= 0;
8249 if (this->is_output_micromips()
8250 && !this->plt_section()->has_standard_entries())
8251 nonvis
= elfcpp::STO_MICROMIPS
>> 2;
8252 symtab
->define_in_output_data("_PROCEDURE_LINKAGE_TABLE_", NULL
,
8253 Symbol_table::PREDEFINED
,
8255 0, 0, elfcpp::STT_FUNC
,
8257 elfcpp::STV_DEFAULT
, nonvis
,
8261 if (this->mips_stubs_
!= NULL
)
8263 // Define _MIPS_STUBS_ at the start of the .MIPS.stubs section.
8264 unsigned char nonvis
= 0;
8265 if (this->is_output_micromips())
8266 nonvis
= elfcpp::STO_MICROMIPS
>> 2;
8267 symtab
->define_in_output_data("_MIPS_STUBS_", NULL
,
8268 Symbol_table::PREDEFINED
,
8270 0, 0, elfcpp::STT_FUNC
,
8272 elfcpp::STV_DEFAULT
, nonvis
,
8276 if (!parameters
->options().relocatable() && !parameters
->doing_static_link())
8277 // In case there is no .got section, create one.
8278 this->got_section(symtab
, layout
);
8280 // Emit any relocs we saved in an attempt to avoid generating COPY
8282 if (this->copy_relocs_
.any_saved_relocs())
8283 this->copy_relocs_
.emit_mips(this->rel_dyn_section(layout
), symtab
, layout
,
8286 // Emit dynamic relocs.
8287 for (typename
std::vector
<Dyn_reloc
>::iterator p
= this->dyn_relocs_
.begin();
8288 p
!= this->dyn_relocs_
.end();
8290 p
->emit(this->rel_dyn_section(layout
), this->got_section(), symtab
);
8292 if (this->has_got_section())
8293 this->got_section()->lay_out_got(layout
, symtab
, input_objects
);
8295 if (this->mips_stubs_
!= NULL
)
8296 this->mips_stubs_
->set_needs_dynsym_value();
8298 // Check for functions that might need $25 to be valid on entry.
8299 // TODO(sasa): Can we do this without iterating over all symbols?
8300 typedef Symbol_visitor_check_symbols
<size
, big_endian
> Symbol_visitor
;
8301 symtab
->for_all_symbols
<size
, Symbol_visitor
>(Symbol_visitor(this, layout
,
8304 // Add NULL segment.
8305 if (!parameters
->options().relocatable())
8306 layout
->make_output_segment(elfcpp::PT_NULL
, 0);
8308 for (Layout::Section_list::const_iterator p
= layout
->section_list().begin();
8309 p
!= layout
->section_list().end();
8312 if ((*p
)->type() == elfcpp::SHT_MIPS_REGINFO
)
8314 Mips_output_section_reginfo
<size
, big_endian
>* reginfo
=
8315 Mips_output_section_reginfo
<size
, big_endian
>::
8316 as_mips_output_section_reginfo(*p
);
8318 reginfo
->set_masks(gprmask
, cprmask1
, cprmask2
, cprmask3
, cprmask4
);
8320 if (!parameters
->options().relocatable())
8322 Output_segment
* reginfo_segment
=
8323 layout
->make_output_segment(elfcpp::PT_MIPS_REGINFO
,
8325 reginfo_segment
->add_output_section_to_nonload(reginfo
,
8331 // Fill in some more dynamic tags.
8332 // TODO(sasa): Add more dynamic tags.
8333 const Reloc_section
* rel_plt
= (this->plt_
== NULL
8334 ? NULL
: this->plt_
->rel_plt());
8335 layout
->add_target_dynamic_tags(true, this->got_
, rel_plt
,
8336 this->rel_dyn_
, true, false);
8338 Output_data_dynamic
* const odyn
= layout
->dynamic_data();
8340 && !parameters
->options().relocatable()
8341 && !parameters
->doing_static_link())
8344 // This element holds a 32-bit version id for the Runtime
8345 // Linker Interface. This will start at integer value 1.
8347 odyn
->add_constant(elfcpp::DT_MIPS_RLD_VERSION
, d_val
);
8350 d_val
= elfcpp::RHF_NOTPOT
;
8351 odyn
->add_constant(elfcpp::DT_MIPS_FLAGS
, d_val
);
8353 // Save layout for using when emiting custom dynamic tags.
8354 this->layout_
= layout
;
8356 // This member holds the base address of the segment.
8357 odyn
->add_custom(elfcpp::DT_MIPS_BASE_ADDRESS
);
8359 // This member holds the number of entries in the .dynsym section.
8360 odyn
->add_custom(elfcpp::DT_MIPS_SYMTABNO
);
8362 // This member holds the index of the first dynamic symbol
8363 // table entry that corresponds to an entry in the global offset table.
8364 odyn
->add_custom(elfcpp::DT_MIPS_GOTSYM
);
8366 // This member holds the number of local GOT entries.
8367 odyn
->add_constant(elfcpp::DT_MIPS_LOCAL_GOTNO
,
8368 this->got_
->get_local_gotno());
8370 if (this->plt_
!= NULL
)
8371 // DT_MIPS_PLTGOT dynamic tag
8372 odyn
->add_section_address(elfcpp::DT_MIPS_PLTGOT
, this->got_plt_
);
8376 // Get the custom dynamic tag value.
8377 template<int size
, bool big_endian
>
8379 Target_mips
<size
, big_endian
>::do_dynamic_tag_custom_value(elfcpp::DT tag
) const
8383 case elfcpp::DT_MIPS_BASE_ADDRESS
:
8385 // The base address of the segment.
8386 // At this point, the segment list has been sorted into final order,
8387 // so just return vaddr of the first readable PT_LOAD segment.
8388 Output_segment
* seg
=
8389 this->layout_
->find_output_segment(elfcpp::PT_LOAD
, elfcpp::PF_R
, 0);
8390 gold_assert(seg
!= NULL
);
8391 return seg
->vaddr();
8394 case elfcpp::DT_MIPS_SYMTABNO
:
8395 // The number of entries in the .dynsym section.
8396 return this->get_dt_mips_symtabno();
8398 case elfcpp::DT_MIPS_GOTSYM
:
8400 // The index of the first dynamic symbol table entry that corresponds
8401 // to an entry in the GOT.
8402 if (this->got_
->first_global_got_dynsym_index() != -1U)
8403 return this->got_
->first_global_got_dynsym_index();
8405 // In case if we don't have global GOT symbols we default to setting
8406 // DT_MIPS_GOTSYM to the same value as DT_MIPS_SYMTABNO.
8407 return this->get_dt_mips_symtabno();
8411 gold_error(_("Unknown dynamic tag 0x%x"), (unsigned int)tag
);
8414 return (unsigned int)-1;
8417 // Relocate section data.
8419 template<int size
, bool big_endian
>
8421 Target_mips
<size
, big_endian
>::relocate_section(
8422 const Relocate_info
<size
, big_endian
>* relinfo
,
8423 unsigned int sh_type
,
8424 const unsigned char* prelocs
,
8426 Output_section
* output_section
,
8427 bool needs_special_offset_handling
,
8428 unsigned char* view
,
8429 Mips_address address
,
8430 section_size_type view_size
,
8431 const Reloc_symbol_changes
* reloc_symbol_changes
)
8433 typedef Target_mips
<size
, big_endian
> Mips
;
8434 typedef typename Target_mips
<size
, big_endian
>::Relocate Mips_relocate
;
8436 if (sh_type
== elfcpp::SHT_REL
)
8438 typedef Mips_classify_reloc
<elfcpp::SHT_REL
, size
, big_endian
>
8441 gold::relocate_section
<size
, big_endian
, Mips
, Mips_relocate
,
8442 gold::Default_comdat_behavior
, Classify_reloc
>(
8448 needs_special_offset_handling
,
8452 reloc_symbol_changes
);
8454 else if (sh_type
== elfcpp::SHT_RELA
)
8456 typedef Mips_classify_reloc
<elfcpp::SHT_RELA
, size
, big_endian
>
8459 gold::relocate_section
<size
, big_endian
, Mips
, Mips_relocate
,
8460 gold::Default_comdat_behavior
, Classify_reloc
>(
8466 needs_special_offset_handling
,
8470 reloc_symbol_changes
);
8474 // Return the size of a relocation while scanning during a relocatable
8478 mips_get_size_for_reloc(unsigned int r_type
, Relobj
* object
)
8482 case elfcpp::R_MIPS_NONE
:
8483 case elfcpp::R_MIPS_TLS_DTPMOD64
:
8484 case elfcpp::R_MIPS_TLS_DTPREL64
:
8485 case elfcpp::R_MIPS_TLS_TPREL64
:
8488 case elfcpp::R_MIPS_32
:
8489 case elfcpp::R_MIPS_TLS_DTPMOD32
:
8490 case elfcpp::R_MIPS_TLS_DTPREL32
:
8491 case elfcpp::R_MIPS_TLS_TPREL32
:
8492 case elfcpp::R_MIPS_REL32
:
8493 case elfcpp::R_MIPS_PC32
:
8494 case elfcpp::R_MIPS_GPREL32
:
8495 case elfcpp::R_MIPS_JALR
:
8498 case elfcpp::R_MIPS_16
:
8499 case elfcpp::R_MIPS_HI16
:
8500 case elfcpp::R_MIPS_LO16
:
8501 case elfcpp::R_MIPS_GPREL16
:
8502 case elfcpp::R_MIPS16_HI16
:
8503 case elfcpp::R_MIPS16_LO16
:
8504 case elfcpp::R_MIPS_PC16
:
8505 case elfcpp::R_MIPS_GOT16
:
8506 case elfcpp::R_MIPS16_GOT16
:
8507 case elfcpp::R_MIPS_CALL16
:
8508 case elfcpp::R_MIPS16_CALL16
:
8509 case elfcpp::R_MIPS_GOT_HI16
:
8510 case elfcpp::R_MIPS_CALL_HI16
:
8511 case elfcpp::R_MIPS_GOT_LO16
:
8512 case elfcpp::R_MIPS_CALL_LO16
:
8513 case elfcpp::R_MIPS_TLS_DTPREL_HI16
:
8514 case elfcpp::R_MIPS_TLS_DTPREL_LO16
:
8515 case elfcpp::R_MIPS_TLS_TPREL_HI16
:
8516 case elfcpp::R_MIPS_TLS_TPREL_LO16
:
8517 case elfcpp::R_MIPS16_GPREL
:
8518 case elfcpp::R_MIPS_GOT_DISP
:
8519 case elfcpp::R_MIPS_LITERAL
:
8520 case elfcpp::R_MIPS_GOT_PAGE
:
8521 case elfcpp::R_MIPS_GOT_OFST
:
8522 case elfcpp::R_MIPS_TLS_GD
:
8523 case elfcpp::R_MIPS_TLS_LDM
:
8524 case elfcpp::R_MIPS_TLS_GOTTPREL
:
8527 // These relocations are not byte sized
8528 case elfcpp::R_MIPS_26
:
8529 case elfcpp::R_MIPS16_26
:
8532 case elfcpp::R_MIPS_COPY
:
8533 case elfcpp::R_MIPS_JUMP_SLOT
:
8534 object
->error(_("unexpected reloc %u in object file"), r_type
);
8538 object
->error(_("unsupported reloc %u in object file"), r_type
);
8543 // Scan the relocs during a relocatable link.
8545 template<int size
, bool big_endian
>
8547 Target_mips
<size
, big_endian
>::scan_relocatable_relocs(
8548 Symbol_table
* symtab
,
8550 Sized_relobj_file
<size
, big_endian
>* object
,
8551 unsigned int data_shndx
,
8552 unsigned int sh_type
,
8553 const unsigned char* prelocs
,
8555 Output_section
* output_section
,
8556 bool needs_special_offset_handling
,
8557 size_t local_symbol_count
,
8558 const unsigned char* plocal_symbols
,
8559 Relocatable_relocs
* rr
)
8561 typedef Mips_classify_reloc
<elfcpp::SHT_REL
, size
, big_endian
>
8563 typedef Mips_scan_relocatable_relocs
<big_endian
, Classify_reloc
>
8564 Scan_relocatable_relocs
;
8566 gold_assert(sh_type
== elfcpp::SHT_REL
);
8568 gold::scan_relocatable_relocs
<size
, big_endian
, Scan_relocatable_relocs
>(
8576 needs_special_offset_handling
,
8582 // Scan the relocs for --emit-relocs.
8584 template<int size
, bool big_endian
>
8586 Target_mips
<size
, big_endian
>::emit_relocs_scan(
8587 Symbol_table
* symtab
,
8589 Sized_relobj_file
<size
, big_endian
>* object
,
8590 unsigned int data_shndx
,
8591 unsigned int sh_type
,
8592 const unsigned char* prelocs
,
8594 Output_section
* output_section
,
8595 bool needs_special_offset_handling
,
8596 size_t local_symbol_count
,
8597 const unsigned char* plocal_syms
,
8598 Relocatable_relocs
* rr
)
8600 typedef Mips_classify_reloc
<elfcpp::SHT_REL
, size
, big_endian
>
8602 typedef gold::Default_emit_relocs_strategy
<Classify_reloc
>
8603 Emit_relocs_strategy
;
8605 gold_assert(sh_type
== elfcpp::SHT_REL
);
8607 gold::scan_relocatable_relocs
<size
, big_endian
, Emit_relocs_strategy
>(
8615 needs_special_offset_handling
,
8621 // Emit relocations for a section.
8623 template<int size
, bool big_endian
>
8625 Target_mips
<size
, big_endian
>::relocate_relocs(
8626 const Relocate_info
<size
, big_endian
>* relinfo
,
8627 unsigned int sh_type
,
8628 const unsigned char* prelocs
,
8630 Output_section
* output_section
,
8631 typename
elfcpp::Elf_types
<size
>::Elf_Off
8632 offset_in_output_section
,
8633 unsigned char* view
,
8634 Mips_address view_address
,
8635 section_size_type view_size
,
8636 unsigned char* reloc_view
,
8637 section_size_type reloc_view_size
)
8639 typedef Mips_classify_reloc
<elfcpp::SHT_REL
, size
, big_endian
>
8642 gold_assert(sh_type
== elfcpp::SHT_REL
);
8644 gold::relocate_relocs
<size
, big_endian
, Classify_reloc
>(
8649 offset_in_output_section
,
8657 // Perform target-specific processing in a relocatable link. This is
8658 // only used if we use the relocation strategy RELOC_SPECIAL.
8660 template<int size
, bool big_endian
>
8662 Target_mips
<size
, big_endian
>::relocate_special_relocatable(
8663 const Relocate_info
<size
, big_endian
>* relinfo
,
8664 unsigned int sh_type
,
8665 const unsigned char* preloc_in
,
8667 Output_section
* output_section
,
8668 typename
elfcpp::Elf_types
<size
>::Elf_Off offset_in_output_section
,
8669 unsigned char* view
,
8670 Mips_address view_address
,
8672 unsigned char* preloc_out
)
8674 // We can only handle REL type relocation sections.
8675 gold_assert(sh_type
== elfcpp::SHT_REL
);
8677 typedef typename Reloc_types
<elfcpp::SHT_REL
, size
, big_endian
>::Reloc
8679 typedef typename Reloc_types
<elfcpp::SHT_REL
, size
, big_endian
>::Reloc_write
8682 typedef Mips_relocate_functions
<size
, big_endian
> Reloc_funcs
;
8684 const Mips_address invalid_address
= static_cast<Mips_address
>(0) - 1;
8686 Mips_relobj
<size
, big_endian
>* object
=
8687 Mips_relobj
<size
, big_endian
>::as_mips_relobj(relinfo
->object
);
8688 const unsigned int local_count
= object
->local_symbol_count();
8690 Reltype
reloc(preloc_in
);
8691 Reltype_write
reloc_write(preloc_out
);
8693 elfcpp::Elf_types
<32>::Elf_WXword r_info
= reloc
.get_r_info();
8694 const unsigned int r_sym
= elfcpp::elf_r_sym
<size
>(r_info
);
8695 const unsigned int r_type
= elfcpp::elf_r_type
<size
>(r_info
);
8697 // Get the new symbol index.
8698 // We only use RELOC_SPECIAL strategy in local relocations.
8699 gold_assert(r_sym
< local_count
);
8701 // We are adjusting a section symbol. We need to find
8702 // the symbol table index of the section symbol for
8703 // the output section corresponding to input section
8704 // in which this symbol is defined.
8706 unsigned int shndx
= object
->local_symbol_input_shndx(r_sym
, &is_ordinary
);
8707 gold_assert(is_ordinary
);
8708 Output_section
* os
= object
->output_section(shndx
);
8709 gold_assert(os
!= NULL
);
8710 gold_assert(os
->needs_symtab_index());
8711 unsigned int new_symndx
= os
->symtab_index();
8713 // Get the new offset--the location in the output section where
8714 // this relocation should be applied.
8716 Mips_address offset
= reloc
.get_r_offset();
8717 Mips_address new_offset
;
8718 if (offset_in_output_section
!= invalid_address
)
8719 new_offset
= offset
+ offset_in_output_section
;
8722 section_offset_type sot_offset
=
8723 convert_types
<section_offset_type
, Mips_address
>(offset
);
8724 section_offset_type new_sot_offset
=
8725 output_section
->output_offset(object
, relinfo
->data_shndx
,
8727 gold_assert(new_sot_offset
!= -1);
8728 new_offset
= new_sot_offset
;
8731 // In an object file, r_offset is an offset within the section.
8732 // In an executable or dynamic object, generated by
8733 // --emit-relocs, r_offset is an absolute address.
8734 if (!parameters
->options().relocatable())
8736 new_offset
+= view_address
;
8737 if (offset_in_output_section
!= invalid_address
)
8738 new_offset
-= offset_in_output_section
;
8741 reloc_write
.put_r_offset(new_offset
);
8742 reloc_write
.put_r_info(elfcpp::elf_r_info
<32>(new_symndx
, r_type
));
8744 // Handle the reloc addend.
8745 // The relocation uses a section symbol in the input file.
8746 // We are adjusting it to use a section symbol in the output
8747 // file. The input section symbol refers to some address in
8748 // the input section. We need the relocation in the output
8749 // file to refer to that same address. This adjustment to
8750 // the addend is the same calculation we use for a simple
8751 // absolute relocation for the input section symbol.
8753 const Symbol_value
<size
>* psymval
= object
->local_symbol(r_sym
);
8755 unsigned char* paddend
= view
+ offset
;
8756 typename
Reloc_funcs::Status reloc_status
= Reloc_funcs::STATUS_OKAY
;
8759 case elfcpp::R_MIPS_26
:
8760 reloc_status
= Reloc_funcs::rel26(paddend
, object
, psymval
,
8761 offset_in_output_section
, true, 0, sh_type
== elfcpp::SHT_REL
, NULL
,
8762 false /*TODO(sasa): cross mode jump*/, r_type
, this->jal_to_bal());
8769 // Report any errors.
8770 switch (reloc_status
)
8772 case Reloc_funcs::STATUS_OKAY
:
8774 case Reloc_funcs::STATUS_OVERFLOW
:
8775 gold_error_at_location(relinfo
, relnum
, reloc
.get_r_offset(),
8776 _("relocation overflow"));
8778 case Reloc_funcs::STATUS_BAD_RELOC
:
8779 gold_error_at_location(relinfo
, relnum
, reloc
.get_r_offset(),
8780 _("unexpected opcode while processing relocation"));
8787 // Optimize the TLS relocation type based on what we know about the
8788 // symbol. IS_FINAL is true if the final address of this symbol is
8789 // known at link time.
8791 template<int size
, bool big_endian
>
8792 tls::Tls_optimization
8793 Target_mips
<size
, big_endian
>::optimize_tls_reloc(bool, int)
8795 // FIXME: Currently we do not do any TLS optimization.
8796 return tls::TLSOPT_NONE
;
8799 // Scan a relocation for a local symbol.
8801 template<int size
, bool big_endian
>
8803 Target_mips
<size
, big_endian
>::Scan::local(
8804 Symbol_table
* symtab
,
8806 Target_mips
<size
, big_endian
>* target
,
8807 Sized_relobj_file
<size
, big_endian
>* object
,
8808 unsigned int data_shndx
,
8809 Output_section
* output_section
,
8810 const Relatype
* rela
,
8812 unsigned int rel_type
,
8813 unsigned int r_type
,
8814 const elfcpp::Sym
<size
, big_endian
>& lsym
,
8820 Mips_address r_offset
;
8822 typename
elfcpp::Elf_types
<size
>::Elf_Swxword r_addend
;
8824 if (rel_type
== elfcpp::SHT_RELA
)
8826 r_offset
= rela
->get_r_offset();
8827 r_sym
= Mips_classify_reloc
<elfcpp::SHT_RELA
, size
, big_endian
>::
8829 r_addend
= rela
->get_r_addend();
8833 r_offset
= rel
->get_r_offset();
8834 r_sym
= Mips_classify_reloc
<elfcpp::SHT_REL
, size
, big_endian
>::
8839 Mips_relobj
<size
, big_endian
>* mips_obj
=
8840 Mips_relobj
<size
, big_endian
>::as_mips_relobj(object
);
8842 if (mips_obj
->is_mips16_stub_section(data_shndx
))
8844 mips_obj
->get_mips16_stub_section(data_shndx
)
8845 ->new_local_reloc_found(r_type
, r_sym
);
8848 if (r_type
== elfcpp::R_MIPS_NONE
)
8849 // R_MIPS_NONE is used in mips16 stub sections, to define the target of the
8853 if (!mips16_call_reloc(r_type
)
8854 && !mips_obj
->section_allows_mips16_refs(data_shndx
))
8855 // This reloc would need to refer to a MIPS16 hard-float stub, if
8856 // there is one. We ignore MIPS16 stub sections and .pdr section when
8857 // looking for relocs that would need to refer to MIPS16 stubs.
8858 mips_obj
->add_local_non_16bit_call(r_sym
);
8860 if (r_type
== elfcpp::R_MIPS16_26
8861 && !mips_obj
->section_allows_mips16_refs(data_shndx
))
8862 mips_obj
->add_local_16bit_call(r_sym
);
8866 case elfcpp::R_MIPS_GOT16
:
8867 case elfcpp::R_MIPS_CALL16
:
8868 case elfcpp::R_MIPS_CALL_HI16
:
8869 case elfcpp::R_MIPS_CALL_LO16
:
8870 case elfcpp::R_MIPS_GOT_HI16
:
8871 case elfcpp::R_MIPS_GOT_LO16
:
8872 case elfcpp::R_MIPS_GOT_PAGE
:
8873 case elfcpp::R_MIPS_GOT_OFST
:
8874 case elfcpp::R_MIPS_GOT_DISP
:
8875 case elfcpp::R_MIPS_TLS_GOTTPREL
:
8876 case elfcpp::R_MIPS_TLS_GD
:
8877 case elfcpp::R_MIPS_TLS_LDM
:
8878 case elfcpp::R_MIPS16_GOT16
:
8879 case elfcpp::R_MIPS16_CALL16
:
8880 case elfcpp::R_MIPS16_TLS_GOTTPREL
:
8881 case elfcpp::R_MIPS16_TLS_GD
:
8882 case elfcpp::R_MIPS16_TLS_LDM
:
8883 case elfcpp::R_MICROMIPS_GOT16
:
8884 case elfcpp::R_MICROMIPS_CALL16
:
8885 case elfcpp::R_MICROMIPS_CALL_HI16
:
8886 case elfcpp::R_MICROMIPS_CALL_LO16
:
8887 case elfcpp::R_MICROMIPS_GOT_HI16
:
8888 case elfcpp::R_MICROMIPS_GOT_LO16
:
8889 case elfcpp::R_MICROMIPS_GOT_PAGE
:
8890 case elfcpp::R_MICROMIPS_GOT_OFST
:
8891 case elfcpp::R_MICROMIPS_GOT_DISP
:
8892 case elfcpp::R_MICROMIPS_TLS_GOTTPREL
:
8893 case elfcpp::R_MICROMIPS_TLS_GD
:
8894 case elfcpp::R_MICROMIPS_TLS_LDM
:
8895 // We need a GOT section.
8896 target
->got_section(symtab
, layout
);
8903 if (call_lo16_reloc(r_type
)
8904 || got_lo16_reloc(r_type
)
8905 || got_disp_reloc(r_type
))
8907 // We may need a local GOT entry for this relocation. We
8908 // don't count R_MIPS_GOT_PAGE because we can estimate the
8909 // maximum number of pages needed by looking at the size of
8910 // the segment. Similar comments apply to R_MIPS*_GOT16 and
8911 // R_MIPS*_CALL16. We don't count R_MIPS_GOT_HI16, or
8912 // R_MIPS_CALL_HI16 because these are always followed by an
8913 // R_MIPS_GOT_LO16 or R_MIPS_CALL_LO16.
8914 Mips_output_data_got
<size
, big_endian
>* got
=
8915 target
->got_section(symtab
, layout
);
8916 got
->record_local_got_symbol(mips_obj
, r_sym
, r_addend
, r_type
, -1U);
8921 case elfcpp::R_MIPS_CALL16
:
8922 case elfcpp::R_MIPS16_CALL16
:
8923 case elfcpp::R_MICROMIPS_CALL16
:
8924 gold_error(_("CALL16 reloc at 0x%lx not against global symbol "),
8925 (unsigned long)r_offset
);
8928 case elfcpp::R_MIPS_GOT_PAGE
:
8929 case elfcpp::R_MICROMIPS_GOT_PAGE
:
8930 case elfcpp::R_MIPS16_GOT16
:
8931 case elfcpp::R_MIPS_GOT16
:
8932 case elfcpp::R_MIPS_GOT_HI16
:
8933 case elfcpp::R_MIPS_GOT_LO16
:
8934 case elfcpp::R_MICROMIPS_GOT16
:
8935 case elfcpp::R_MICROMIPS_GOT_HI16
:
8936 case elfcpp::R_MICROMIPS_GOT_LO16
:
8938 // This relocation needs a page entry in the GOT.
8939 // Get the section contents.
8940 section_size_type view_size
= 0;
8941 const unsigned char* view
= object
->section_contents(data_shndx
,
8945 Valtype32 val
= elfcpp::Swap
<32, big_endian
>::readval(view
);
8946 Valtype32 addend
= (rel_type
== elfcpp::SHT_REL
? val
& 0xffff
8949 if (rel_type
== elfcpp::SHT_REL
&& got16_reloc(r_type
))
8950 target
->got16_addends_
.push_back(got16_addend
<size
, big_endian
>(
8951 object
, data_shndx
, r_type
, r_sym
, addend
));
8953 target
->got_section()->record_got_page_entry(mips_obj
, r_sym
, addend
);
8957 case elfcpp::R_MIPS_HI16
:
8958 case elfcpp::R_MIPS16_HI16
:
8959 case elfcpp::R_MICROMIPS_HI16
:
8960 // Record the reloc so that we can check whether the corresponding LO16
8962 if (rel_type
== elfcpp::SHT_REL
)
8963 target
->got16_addends_
.push_back(got16_addend
<size
, big_endian
>(
8964 object
, data_shndx
, r_type
, r_sym
, 0));
8967 case elfcpp::R_MIPS_LO16
:
8968 case elfcpp::R_MIPS16_LO16
:
8969 case elfcpp::R_MICROMIPS_LO16
:
8971 if (rel_type
!= elfcpp::SHT_REL
)
8974 // Find corresponding GOT16/HI16 relocation.
8976 // According to the MIPS ELF ABI, the R_MIPS_LO16 relocation must
8977 // be immediately following. However, for the IRIX6 ABI, the next
8978 // relocation may be a composed relocation consisting of several
8979 // relocations for the same address. In that case, the R_MIPS_LO16
8980 // relocation may occur as one of these. We permit a similar
8981 // extension in general, as that is useful for GCC.
8983 // In some cases GCC dead code elimination removes the LO16 but
8984 // keeps the corresponding HI16. This is strictly speaking a
8985 // violation of the ABI but not immediately harmful.
8987 typename
std::list
<got16_addend
<size
, big_endian
> >::iterator it
=
8988 target
->got16_addends_
.begin();
8989 while (it
!= target
->got16_addends_
.end())
8991 got16_addend
<size
, big_endian
> _got16_addend
= *it
;
8993 // TODO(sasa): Split got16_addends_ list into two lists - one for
8994 // GOT16 relocs and the other for HI16 relocs.
8996 // Report an error if we find HI16 or GOT16 reloc from the
8997 // previous section without the matching LO16 part.
8998 if (_got16_addend
.object
!= object
8999 || _got16_addend
.shndx
!= data_shndx
)
9001 gold_error("Can't find matching LO16 reloc");
9005 if (_got16_addend
.r_sym
!= r_sym
9006 || !is_matching_lo16_reloc(_got16_addend
.r_type
, r_type
))
9012 // We found a matching HI16 or GOT16 reloc for this LO16 reloc.
9013 // For GOT16, we need to calculate combined addend and record GOT page
9015 if (got16_reloc(_got16_addend
.r_type
))
9018 section_size_type view_size
= 0;
9019 const unsigned char* view
= object
->section_contents(data_shndx
,
9024 Valtype32 val
= elfcpp::Swap
<32, big_endian
>::readval(view
);
9025 int32_t addend
= Bits
<16>::sign_extend32(val
& 0xffff);
9027 addend
= (_got16_addend
.addend
<< 16) + addend
;
9028 target
->got_section()->record_got_page_entry(mips_obj
, r_sym
,
9032 it
= target
->got16_addends_
.erase(it
);
9040 case elfcpp::R_MIPS_32
:
9041 case elfcpp::R_MIPS_REL32
:
9042 case elfcpp::R_MIPS_64
:
9044 if (parameters
->options().output_is_position_independent())
9046 // If building a shared library (or a position-independent
9047 // executable), we need to create a dynamic relocation for
9049 Reloc_section
* rel_dyn
= target
->rel_dyn_section(layout
);
9050 rel_dyn
->add_symbolless_local_addend(object
, r_sym
,
9051 elfcpp::R_MIPS_REL32
,
9052 output_section
, data_shndx
,
9058 case elfcpp::R_MIPS_TLS_GOTTPREL
:
9059 case elfcpp::R_MIPS16_TLS_GOTTPREL
:
9060 case elfcpp::R_MICROMIPS_TLS_GOTTPREL
:
9061 case elfcpp::R_MIPS_TLS_LDM
:
9062 case elfcpp::R_MIPS16_TLS_LDM
:
9063 case elfcpp::R_MICROMIPS_TLS_LDM
:
9064 case elfcpp::R_MIPS_TLS_GD
:
9065 case elfcpp::R_MIPS16_TLS_GD
:
9066 case elfcpp::R_MICROMIPS_TLS_GD
:
9068 bool output_is_shared
= parameters
->options().shared();
9069 const tls::Tls_optimization optimized_type
9070 = Target_mips
<size
, big_endian
>::optimize_tls_reloc(
9071 !output_is_shared
, r_type
);
9074 case elfcpp::R_MIPS_TLS_GD
:
9075 case elfcpp::R_MIPS16_TLS_GD
:
9076 case elfcpp::R_MICROMIPS_TLS_GD
:
9077 if (optimized_type
== tls::TLSOPT_NONE
)
9079 // Create a pair of GOT entries for the module index and
9080 // dtv-relative offset.
9081 Mips_output_data_got
<size
, big_endian
>* got
=
9082 target
->got_section(symtab
, layout
);
9083 unsigned int shndx
= lsym
.get_st_shndx();
9085 shndx
= object
->adjust_sym_shndx(r_sym
, shndx
, &is_ordinary
);
9088 object
->error(_("local symbol %u has bad shndx %u"),
9092 got
->record_local_got_symbol(mips_obj
, r_sym
, r_addend
, r_type
,
9097 // FIXME: TLS optimization not supported yet.
9102 case elfcpp::R_MIPS_TLS_LDM
:
9103 case elfcpp::R_MIPS16_TLS_LDM
:
9104 case elfcpp::R_MICROMIPS_TLS_LDM
:
9105 if (optimized_type
== tls::TLSOPT_NONE
)
9107 // We always record LDM symbols as local with index 0.
9108 target
->got_section()->record_local_got_symbol(mips_obj
, 0,
9114 // FIXME: TLS optimization not supported yet.
9118 case elfcpp::R_MIPS_TLS_GOTTPREL
:
9119 case elfcpp::R_MIPS16_TLS_GOTTPREL
:
9120 case elfcpp::R_MICROMIPS_TLS_GOTTPREL
:
9121 layout
->set_has_static_tls();
9122 if (optimized_type
== tls::TLSOPT_NONE
)
9124 // Create a GOT entry for the tp-relative offset.
9125 Mips_output_data_got
<size
, big_endian
>* got
=
9126 target
->got_section(symtab
, layout
);
9127 got
->record_local_got_symbol(mips_obj
, r_sym
, r_addend
, r_type
,
9132 // FIXME: TLS optimization not supported yet.
9147 // Refuse some position-dependent relocations when creating a
9148 // shared library. Do not refuse R_MIPS_32 / R_MIPS_64; they're
9149 // not PIC, but we can create dynamic relocations and the result
9150 // will be fine. Also do not refuse R_MIPS_LO16, which can be
9151 // combined with R_MIPS_GOT16.
9152 if (parameters
->options().shared())
9156 case elfcpp::R_MIPS16_HI16
:
9157 case elfcpp::R_MIPS_HI16
:
9158 case elfcpp::R_MICROMIPS_HI16
:
9159 // Don't refuse a high part relocation if it's against
9160 // no symbol (e.g. part of a compound relocation).
9166 case elfcpp::R_MIPS16_26
:
9167 case elfcpp::R_MIPS_26
:
9168 case elfcpp::R_MICROMIPS_26_S1
:
9169 gold_error(_("%s: relocation %u against `%s' can not be used when "
9170 "making a shared object; recompile with -fPIC"),
9171 object
->name().c_str(), r_type
, "a local symbol");
9178 template<int size
, bool big_endian
>
9180 Target_mips
<size
, big_endian
>::Scan::local(
9181 Symbol_table
* symtab
,
9183 Target_mips
<size
, big_endian
>* target
,
9184 Sized_relobj_file
<size
, big_endian
>* object
,
9185 unsigned int data_shndx
,
9186 Output_section
* output_section
,
9187 const Reltype
& reloc
,
9188 unsigned int r_type
,
9189 const elfcpp::Sym
<size
, big_endian
>& lsym
,
9202 (const Relatype
*) NULL
,
9206 lsym
, is_discarded
);
9210 template<int size
, bool big_endian
>
9212 Target_mips
<size
, big_endian
>::Scan::local(
9213 Symbol_table
* symtab
,
9215 Target_mips
<size
, big_endian
>* target
,
9216 Sized_relobj_file
<size
, big_endian
>* object
,
9217 unsigned int data_shndx
,
9218 Output_section
* output_section
,
9219 const Relatype
& reloc
,
9220 unsigned int r_type
,
9221 const elfcpp::Sym
<size
, big_endian
>& lsym
,
9235 (const Reltype
*) NULL
,
9238 lsym
, is_discarded
);
9241 // Scan a relocation for a global symbol.
9243 template<int size
, bool big_endian
>
9245 Target_mips
<size
, big_endian
>::Scan::global(
9246 Symbol_table
* symtab
,
9248 Target_mips
<size
, big_endian
>* target
,
9249 Sized_relobj_file
<size
, big_endian
>* object
,
9250 unsigned int data_shndx
,
9251 Output_section
* output_section
,
9252 const Relatype
* rela
,
9254 unsigned int rel_type
,
9255 unsigned int r_type
,
9258 Mips_address r_offset
;
9260 typename
elfcpp::Elf_types
<size
>::Elf_Swxword r_addend
;
9262 if (rel_type
== elfcpp::SHT_RELA
)
9264 r_offset
= rela
->get_r_offset();
9265 r_sym
= Mips_classify_reloc
<elfcpp::SHT_RELA
, size
, big_endian
>::
9267 r_addend
= rela
->get_r_addend();
9271 r_offset
= rel
->get_r_offset();
9272 r_sym
= Mips_classify_reloc
<elfcpp::SHT_REL
, size
, big_endian
>::
9277 Mips_relobj
<size
, big_endian
>* mips_obj
=
9278 Mips_relobj
<size
, big_endian
>::as_mips_relobj(object
);
9279 Mips_symbol
<size
>* mips_sym
= Mips_symbol
<size
>::as_mips_sym(gsym
);
9281 if (mips_obj
->is_mips16_stub_section(data_shndx
))
9283 mips_obj
->get_mips16_stub_section(data_shndx
)
9284 ->new_global_reloc_found(r_type
, mips_sym
);
9287 if (r_type
== elfcpp::R_MIPS_NONE
)
9288 // R_MIPS_NONE is used in mips16 stub sections, to define the target of the
9292 if (!mips16_call_reloc(r_type
)
9293 && !mips_obj
->section_allows_mips16_refs(data_shndx
))
9294 // This reloc would need to refer to a MIPS16 hard-float stub, if
9295 // there is one. We ignore MIPS16 stub sections and .pdr section when
9296 // looking for relocs that would need to refer to MIPS16 stubs.
9297 mips_sym
->set_need_fn_stub();
9299 // A reference to _GLOBAL_OFFSET_TABLE_ implies that we need a got
9300 // section. We check here to avoid creating a dynamic reloc against
9301 // _GLOBAL_OFFSET_TABLE_.
9302 if (!target
->has_got_section()
9303 && strcmp(gsym
->name(), "_GLOBAL_OFFSET_TABLE_") == 0)
9304 target
->got_section(symtab
, layout
);
9306 // We need PLT entries if there are static-only relocations against
9307 // an externally-defined function. This can technically occur for
9308 // shared libraries if there are branches to the symbol, although it
9309 // is unlikely that this will be used in practice due to the short
9310 // ranges involved. It can occur for any relative or absolute relocation
9311 // in executables; in that case, the PLT entry becomes the function's
9312 // canonical address.
9313 bool static_reloc
= false;
9315 // Set CAN_MAKE_DYNAMIC to true if we can convert this
9316 // relocation into a dynamic one.
9317 bool can_make_dynamic
= false;
9320 case elfcpp::R_MIPS_GOT16
:
9321 case elfcpp::R_MIPS_CALL16
:
9322 case elfcpp::R_MIPS_CALL_HI16
:
9323 case elfcpp::R_MIPS_CALL_LO16
:
9324 case elfcpp::R_MIPS_GOT_HI16
:
9325 case elfcpp::R_MIPS_GOT_LO16
:
9326 case elfcpp::R_MIPS_GOT_PAGE
:
9327 case elfcpp::R_MIPS_GOT_OFST
:
9328 case elfcpp::R_MIPS_GOT_DISP
:
9329 case elfcpp::R_MIPS_TLS_GOTTPREL
:
9330 case elfcpp::R_MIPS_TLS_GD
:
9331 case elfcpp::R_MIPS_TLS_LDM
:
9332 case elfcpp::R_MIPS16_GOT16
:
9333 case elfcpp::R_MIPS16_CALL16
:
9334 case elfcpp::R_MIPS16_TLS_GOTTPREL
:
9335 case elfcpp::R_MIPS16_TLS_GD
:
9336 case elfcpp::R_MIPS16_TLS_LDM
:
9337 case elfcpp::R_MICROMIPS_GOT16
:
9338 case elfcpp::R_MICROMIPS_CALL16
:
9339 case elfcpp::R_MICROMIPS_CALL_HI16
:
9340 case elfcpp::R_MICROMIPS_CALL_LO16
:
9341 case elfcpp::R_MICROMIPS_GOT_HI16
:
9342 case elfcpp::R_MICROMIPS_GOT_LO16
:
9343 case elfcpp::R_MICROMIPS_GOT_PAGE
:
9344 case elfcpp::R_MICROMIPS_GOT_OFST
:
9345 case elfcpp::R_MICROMIPS_GOT_DISP
:
9346 case elfcpp::R_MICROMIPS_TLS_GOTTPREL
:
9347 case elfcpp::R_MICROMIPS_TLS_GD
:
9348 case elfcpp::R_MICROMIPS_TLS_LDM
:
9349 // We need a GOT section.
9350 target
->got_section(symtab
, layout
);
9353 // This is just a hint; it can safely be ignored. Don't set
9354 // has_static_relocs for the corresponding symbol.
9355 case elfcpp::R_MIPS_JALR
:
9356 case elfcpp::R_MICROMIPS_JALR
:
9359 case elfcpp::R_MIPS_GPREL16
:
9360 case elfcpp::R_MIPS_GPREL32
:
9361 case elfcpp::R_MIPS16_GPREL
:
9362 case elfcpp::R_MICROMIPS_GPREL16
:
9364 // GP-relative relocations always resolve to a definition in a
9365 // regular input file, ignoring the one-definition rule. This is
9366 // important for the GP setup sequence in NewABI code, which
9367 // always resolves to a local function even if other relocations
9368 // against the symbol wouldn't.
9369 //constrain_symbol_p = FALSE;
9372 case elfcpp::R_MIPS_32
:
9373 case elfcpp::R_MIPS_REL32
:
9374 case elfcpp::R_MIPS_64
:
9375 if (parameters
->options().shared()
9376 || strcmp(gsym
->name(), "__gnu_local_gp") != 0)
9378 if (r_type
!= elfcpp::R_MIPS_REL32
)
9380 static_reloc
= true;
9381 mips_sym
->set_pointer_equality_needed();
9383 can_make_dynamic
= true;
9389 // Most static relocations require pointer equality, except
9391 mips_sym
->set_pointer_equality_needed();
9395 case elfcpp::R_MIPS_26
:
9396 case elfcpp::R_MIPS_PC16
:
9397 case elfcpp::R_MIPS16_26
:
9398 case elfcpp::R_MICROMIPS_26_S1
:
9399 case elfcpp::R_MICROMIPS_PC7_S1
:
9400 case elfcpp::R_MICROMIPS_PC10_S1
:
9401 case elfcpp::R_MICROMIPS_PC16_S1
:
9402 case elfcpp::R_MICROMIPS_PC23_S2
:
9403 static_reloc
= true;
9404 mips_sym
->set_has_static_relocs();
9408 // If there are call relocations against an externally-defined symbol,
9409 // see whether we can create a MIPS lazy-binding stub for it. We can
9410 // only do this if all references to the function are through call
9411 // relocations, and in that case, the traditional lazy-binding stubs
9412 // are much more efficient than PLT entries.
9415 case elfcpp::R_MIPS16_CALL16
:
9416 case elfcpp::R_MIPS_CALL16
:
9417 case elfcpp::R_MIPS_CALL_HI16
:
9418 case elfcpp::R_MIPS_CALL_LO16
:
9419 case elfcpp::R_MIPS_JALR
:
9420 case elfcpp::R_MICROMIPS_CALL16
:
9421 case elfcpp::R_MICROMIPS_CALL_HI16
:
9422 case elfcpp::R_MICROMIPS_CALL_LO16
:
9423 case elfcpp::R_MICROMIPS_JALR
:
9424 if (!mips_sym
->no_lazy_stub())
9426 if ((mips_sym
->needs_plt_entry() && mips_sym
->is_from_dynobj())
9427 // Calls from shared objects to undefined symbols of type
9428 // STT_NOTYPE need lazy-binding stub.
9429 || (mips_sym
->is_undefined() && parameters
->options().shared()))
9430 target
->mips_stubs_section(layout
)->make_entry(mips_sym
);
9435 // We must not create a stub for a symbol that has relocations
9436 // related to taking the function's address.
9437 mips_sym
->set_no_lazy_stub();
9438 target
->remove_lazy_stub_entry(mips_sym
);
9443 if (relocation_needs_la25_stub
<size
, big_endian
>(mips_obj
, r_type
,
9444 mips_sym
->is_mips16()))
9445 mips_sym
->set_has_nonpic_branches();
9447 // R_MIPS_HI16 against _gp_disp is used for $gp setup,
9448 // and has a special meaning.
9449 bool gp_disp_against_hi16
= (!mips_obj
->is_newabi()
9450 && strcmp(gsym
->name(), "_gp_disp") == 0
9451 && (hi16_reloc(r_type
) || lo16_reloc(r_type
)));
9452 if (static_reloc
&& gsym
->needs_plt_entry())
9454 target
->make_plt_entry(symtab
, layout
, mips_sym
, r_type
);
9456 // Since this is not a PC-relative relocation, we may be
9457 // taking the address of a function. In that case we need to
9458 // set the entry in the dynamic symbol table to the address of
9460 if (gsym
->is_from_dynobj() && !parameters
->options().shared())
9462 gsym
->set_needs_dynsym_value();
9463 // We distinguish between PLT entries and lazy-binding stubs by
9464 // giving the former an st_other value of STO_MIPS_PLT. Set the
9465 // flag if there are any relocations in the binary where pointer
9466 // equality matters.
9467 if (mips_sym
->pointer_equality_needed())
9468 mips_sym
->set_mips_plt();
9471 if ((static_reloc
|| can_make_dynamic
) && !gp_disp_against_hi16
)
9473 // Absolute addressing relocations.
9474 // Make a dynamic relocation if necessary.
9475 if (gsym
->needs_dynamic_reloc(Scan::get_reference_flags(r_type
)))
9477 if (gsym
->may_need_copy_reloc())
9479 target
->copy_reloc(symtab
, layout
, object
,
9480 data_shndx
, output_section
, gsym
, *rel
);
9482 else if (can_make_dynamic
)
9484 // Create .rel.dyn section.
9485 target
->rel_dyn_section(layout
);
9486 target
->dynamic_reloc(mips_sym
, elfcpp::R_MIPS_REL32
, mips_obj
,
9487 data_shndx
, output_section
, r_offset
);
9490 gold_error(_("non-dynamic relocations refer to dynamic symbol %s"),
9495 bool for_call
= false;
9498 case elfcpp::R_MIPS_CALL16
:
9499 case elfcpp::R_MIPS16_CALL16
:
9500 case elfcpp::R_MICROMIPS_CALL16
:
9501 case elfcpp::R_MIPS_CALL_HI16
:
9502 case elfcpp::R_MIPS_CALL_LO16
:
9503 case elfcpp::R_MICROMIPS_CALL_HI16
:
9504 case elfcpp::R_MICROMIPS_CALL_LO16
:
9508 case elfcpp::R_MIPS16_GOT16
:
9509 case elfcpp::R_MIPS_GOT16
:
9510 case elfcpp::R_MIPS_GOT_HI16
:
9511 case elfcpp::R_MIPS_GOT_LO16
:
9512 case elfcpp::R_MICROMIPS_GOT16
:
9513 case elfcpp::R_MICROMIPS_GOT_HI16
:
9514 case elfcpp::R_MICROMIPS_GOT_LO16
:
9515 case elfcpp::R_MIPS_GOT_DISP
:
9516 case elfcpp::R_MICROMIPS_GOT_DISP
:
9518 // The symbol requires a GOT entry.
9519 Mips_output_data_got
<size
, big_endian
>* got
=
9520 target
->got_section(symtab
, layout
);
9521 got
->record_global_got_symbol(mips_sym
, mips_obj
, r_type
, false,
9523 mips_sym
->set_global_got_area(GGA_NORMAL
);
9527 case elfcpp::R_MIPS_GOT_PAGE
:
9528 case elfcpp::R_MICROMIPS_GOT_PAGE
:
9530 // This relocation needs a page entry in the GOT.
9531 // Get the section contents.
9532 section_size_type view_size
= 0;
9533 const unsigned char* view
=
9534 object
->section_contents(data_shndx
, &view_size
, false);
9537 Valtype32 val
= elfcpp::Swap
<32, big_endian
>::readval(view
);
9538 Valtype32 addend
= (rel_type
== elfcpp::SHT_REL
? val
& 0xffff
9540 Mips_output_data_got
<size
, big_endian
>* got
=
9541 target
->got_section(symtab
, layout
);
9542 got
->record_got_page_entry(mips_obj
, r_sym
, addend
);
9544 // If this is a global, overridable symbol, GOT_PAGE will
9545 // decay to GOT_DISP, so we'll need a GOT entry for it.
9546 bool def_regular
= (mips_sym
->source() == Symbol::FROM_OBJECT
9547 && !mips_sym
->object()->is_dynamic()
9548 && !mips_sym
->is_undefined());
9550 || (parameters
->options().output_is_position_independent()
9551 && !parameters
->options().Bsymbolic()
9552 && !mips_sym
->is_forced_local()))
9554 got
->record_global_got_symbol(mips_sym
, mips_obj
, r_type
, false,
9556 mips_sym
->set_global_got_area(GGA_NORMAL
);
9561 case elfcpp::R_MIPS_TLS_GOTTPREL
:
9562 case elfcpp::R_MIPS16_TLS_GOTTPREL
:
9563 case elfcpp::R_MICROMIPS_TLS_GOTTPREL
:
9564 case elfcpp::R_MIPS_TLS_LDM
:
9565 case elfcpp::R_MIPS16_TLS_LDM
:
9566 case elfcpp::R_MICROMIPS_TLS_LDM
:
9567 case elfcpp::R_MIPS_TLS_GD
:
9568 case elfcpp::R_MIPS16_TLS_GD
:
9569 case elfcpp::R_MICROMIPS_TLS_GD
:
9571 const bool is_final
= gsym
->final_value_is_known();
9572 const tls::Tls_optimization optimized_type
=
9573 Target_mips
<size
, big_endian
>::optimize_tls_reloc(is_final
, r_type
);
9577 case elfcpp::R_MIPS_TLS_GD
:
9578 case elfcpp::R_MIPS16_TLS_GD
:
9579 case elfcpp::R_MICROMIPS_TLS_GD
:
9580 if (optimized_type
== tls::TLSOPT_NONE
)
9582 // Create a pair of GOT entries for the module index and
9583 // dtv-relative offset.
9584 Mips_output_data_got
<size
, big_endian
>* got
=
9585 target
->got_section(symtab
, layout
);
9586 got
->record_global_got_symbol(mips_sym
, mips_obj
, r_type
, false,
9591 // FIXME: TLS optimization not supported yet.
9596 case elfcpp::R_MIPS_TLS_LDM
:
9597 case elfcpp::R_MIPS16_TLS_LDM
:
9598 case elfcpp::R_MICROMIPS_TLS_LDM
:
9599 if (optimized_type
== tls::TLSOPT_NONE
)
9601 // We always record LDM symbols as local with index 0.
9602 target
->got_section()->record_local_got_symbol(mips_obj
, 0,
9608 // FIXME: TLS optimization not supported yet.
9612 case elfcpp::R_MIPS_TLS_GOTTPREL
:
9613 case elfcpp::R_MIPS16_TLS_GOTTPREL
:
9614 case elfcpp::R_MICROMIPS_TLS_GOTTPREL
:
9615 layout
->set_has_static_tls();
9616 if (optimized_type
== tls::TLSOPT_NONE
)
9618 // Create a GOT entry for the tp-relative offset.
9619 Mips_output_data_got
<size
, big_endian
>* got
=
9620 target
->got_section(symtab
, layout
);
9621 got
->record_global_got_symbol(mips_sym
, mips_obj
, r_type
, false,
9626 // FIXME: TLS optimization not supported yet.
9636 case elfcpp::R_MIPS_COPY
:
9637 case elfcpp::R_MIPS_JUMP_SLOT
:
9638 // These are relocations which should only be seen by the
9639 // dynamic linker, and should never be seen here.
9640 gold_error(_("%s: unexpected reloc %u in object file"),
9641 object
->name().c_str(), r_type
);
9648 // Refuse some position-dependent relocations when creating a
9649 // shared library. Do not refuse R_MIPS_32 / R_MIPS_64; they're
9650 // not PIC, but we can create dynamic relocations and the result
9651 // will be fine. Also do not refuse R_MIPS_LO16, which can be
9652 // combined with R_MIPS_GOT16.
9653 if (parameters
->options().shared())
9657 case elfcpp::R_MIPS16_HI16
:
9658 case elfcpp::R_MIPS_HI16
:
9659 case elfcpp::R_MICROMIPS_HI16
:
9660 // Don't refuse a high part relocation if it's against
9661 // no symbol (e.g. part of a compound relocation).
9665 // R_MIPS_HI16 against _gp_disp is used for $gp setup,
9666 // and has a special meaning.
9667 if (!mips_obj
->is_newabi() && strcmp(gsym
->name(), "_gp_disp") == 0)
9672 case elfcpp::R_MIPS16_26
:
9673 case elfcpp::R_MIPS_26
:
9674 case elfcpp::R_MICROMIPS_26_S1
:
9675 gold_error(_("%s: relocation %u against `%s' can not be used when "
9676 "making a shared object; recompile with -fPIC"),
9677 object
->name().c_str(), r_type
, gsym
->name());
9684 template<int size
, bool big_endian
>
9686 Target_mips
<size
, big_endian
>::Scan::global(
9687 Symbol_table
* symtab
,
9689 Target_mips
<size
, big_endian
>* target
,
9690 Sized_relobj_file
<size
, big_endian
>* object
,
9691 unsigned int data_shndx
,
9692 Output_section
* output_section
,
9693 const Relatype
& reloc
,
9694 unsigned int r_type
,
9705 (const Reltype
*) NULL
,
9711 template<int size
, bool big_endian
>
9713 Target_mips
<size
, big_endian
>::Scan::global(
9714 Symbol_table
* symtab
,
9716 Target_mips
<size
, big_endian
>* target
,
9717 Sized_relobj_file
<size
, big_endian
>* object
,
9718 unsigned int data_shndx
,
9719 Output_section
* output_section
,
9720 const Reltype
& reloc
,
9721 unsigned int r_type
,
9731 (const Relatype
*) NULL
,
9738 // Return whether a R_MIPS_32 relocation needs to be applied.
9740 template<int size
, bool big_endian
>
9742 Target_mips
<size
, big_endian
>::Relocate::should_apply_r_mips_32_reloc(
9743 const Mips_symbol
<size
>* gsym
,
9744 unsigned int r_type
,
9745 Output_section
* output_section
,
9746 Target_mips
* target
)
9748 // If the output section is not allocated, then we didn't call
9749 // scan_relocs, we didn't create a dynamic reloc, and we must apply
9751 if ((output_section
->flags() & elfcpp::SHF_ALLOC
) == 0)
9758 // For global symbols, we use the same helper routines used in the
9760 if (gsym
->needs_dynamic_reloc(Scan::get_reference_flags(r_type
))
9761 && !gsym
->may_need_copy_reloc())
9763 // We have generated dynamic reloc (R_MIPS_REL32).
9765 bool multi_got
= false;
9766 if (target
->has_got_section())
9767 multi_got
= target
->got_section()->multi_got();
9768 bool has_got_offset
;
9770 has_got_offset
= gsym
->has_got_offset(GOT_TYPE_STANDARD
);
9772 has_got_offset
= gsym
->global_gotoffset() != -1U;
9773 if (!has_got_offset
)
9776 // Apply the relocation only if the symbol is in the local got.
9777 // Do not apply the relocation if the symbol is in the global
9779 return symbol_references_local(gsym
, gsym
->has_dynsym_index());
9782 // We have not generated dynamic reloc.
9787 // Perform a relocation.
9789 template<int size
, bool big_endian
>
9791 Target_mips
<size
, big_endian
>::Relocate::relocate(
9792 const Relocate_info
<size
, big_endian
>* relinfo
,
9793 unsigned int rel_type
,
9794 Target_mips
* target
,
9795 Output_section
* output_section
,
9797 const unsigned char* preloc
,
9798 const Sized_symbol
<size
>* gsym
,
9799 const Symbol_value
<size
>* psymval
,
9800 unsigned char* view
,
9801 Mips_address address
,
9804 Mips_address r_offset
;
9806 unsigned int r_type
;
9807 typename
elfcpp::Elf_types
<size
>::Elf_Swxword r_addend
;
9809 if (rel_type
== elfcpp::SHT_RELA
)
9811 const Relatype
rela(preloc
);
9812 r_offset
= rela
.get_r_offset();
9813 r_sym
= Mips_classify_reloc
<elfcpp::SHT_RELA
, size
, big_endian
>::
9815 r_type
= Mips_classify_reloc
<elfcpp::SHT_RELA
, size
, big_endian
>::
9817 r_addend
= rela
.get_r_addend();
9822 const Reltype
rel(preloc
);
9823 r_offset
= rel
.get_r_offset();
9824 r_sym
= Mips_classify_reloc
<elfcpp::SHT_REL
, size
, big_endian
>::
9826 r_type
= Mips_classify_reloc
<elfcpp::SHT_REL
, size
, big_endian
>::
9831 typedef Mips_relocate_functions
<size
, big_endian
> Reloc_funcs
;
9832 typename
Reloc_funcs::Status reloc_status
= Reloc_funcs::STATUS_OKAY
;
9834 Mips_relobj
<size
, big_endian
>* object
=
9835 Mips_relobj
<size
, big_endian
>::as_mips_relobj(relinfo
->object
);
9837 bool target_is_16_bit_code
= false;
9838 bool target_is_micromips_code
= false;
9839 bool cross_mode_jump
;
9841 Symbol_value
<size
> symval
;
9843 const Mips_symbol
<size
>* mips_sym
= Mips_symbol
<size
>::as_mips_sym(gsym
);
9845 bool changed_symbol_value
= false;
9848 target_is_16_bit_code
= object
->local_symbol_is_mips16(r_sym
);
9849 target_is_micromips_code
= object
->local_symbol_is_micromips(r_sym
);
9850 if (target_is_16_bit_code
|| target_is_micromips_code
)
9852 // MIPS16/microMIPS text labels should be treated as odd.
9853 symval
.set_output_value(psymval
->value(object
, 1));
9855 changed_symbol_value
= true;
9860 target_is_16_bit_code
= mips_sym
->is_mips16();
9861 target_is_micromips_code
= mips_sym
->is_micromips();
9863 // If this is a mips16/microMIPS text symbol, add 1 to the value to make
9864 // it odd. This will cause something like .word SYM to come up with
9865 // the right value when it is loaded into the PC.
9867 if ((mips_sym
->is_mips16() || mips_sym
->is_micromips())
9868 && psymval
->value(object
, 0) != 0)
9870 symval
.set_output_value(psymval
->value(object
, 0) | 1);
9872 changed_symbol_value
= true;
9875 // Pick the value to use for symbols defined in shared objects.
9876 if (mips_sym
->use_plt_offset(Scan::get_reference_flags(r_type
))
9877 || mips_sym
->has_lazy_stub())
9880 if (!mips_sym
->has_lazy_stub())
9882 // Prefer a standard MIPS PLT entry.
9883 if (mips_sym
->has_mips_plt_offset())
9885 value
= target
->plt_section()->mips_entry_address(mips_sym
);
9886 target_is_micromips_code
= false;
9887 target_is_16_bit_code
= false;
9891 value
= (target
->plt_section()->comp_entry_address(mips_sym
)
9893 if (target
->is_output_micromips())
9894 target_is_micromips_code
= true;
9896 target_is_16_bit_code
= true;
9900 value
= target
->mips_stubs_section()->stub_address(mips_sym
);
9902 symval
.set_output_value(value
);
9907 // TRUE if the symbol referred to by this relocation is "_gp_disp".
9908 // Note that such a symbol must always be a global symbol.
9909 bool gp_disp
= (gsym
!= NULL
&& (strcmp(gsym
->name(), "_gp_disp") == 0)
9910 && !object
->is_newabi());
9912 // TRUE if the symbol referred to by this relocation is "__gnu_local_gp".
9913 // Note that such a symbol must always be a global symbol.
9914 bool gnu_local_gp
= gsym
&& (strcmp(gsym
->name(), "__gnu_local_gp") == 0);
9919 if (!hi16_reloc(r_type
) && !lo16_reloc(r_type
))
9920 gold_error_at_location(relinfo
, relnum
, r_offset
,
9921 _("relocations against _gp_disp are permitted only"
9922 " with R_MIPS_HI16 and R_MIPS_LO16 relocations."));
9924 else if (gnu_local_gp
)
9926 // __gnu_local_gp is _gp symbol.
9927 symval
.set_output_value(target
->adjusted_gp_value(object
));
9931 // If this is a reference to a 16-bit function with a stub, we need
9932 // to redirect the relocation to the stub unless:
9934 // (a) the relocation is for a MIPS16 JAL;
9936 // (b) the relocation is for a MIPS16 PIC call, and there are no
9937 // non-MIPS16 uses of the GOT slot; or
9939 // (c) the section allows direct references to MIPS16 functions.
9940 if (r_type
!= elfcpp::R_MIPS16_26
9941 && !parameters
->options().relocatable()
9942 && ((mips_sym
!= NULL
9943 && mips_sym
->has_mips16_fn_stub()
9944 && (r_type
!= elfcpp::R_MIPS16_CALL16
|| mips_sym
->need_fn_stub()))
9945 || (mips_sym
== NULL
9946 && object
->get_local_mips16_fn_stub(r_sym
) != NULL
))
9947 && !object
->section_allows_mips16_refs(relinfo
->data_shndx
))
9949 // This is a 32- or 64-bit call to a 16-bit function. We should
9950 // have already noticed that we were going to need the
9953 if (mips_sym
== NULL
)
9954 value
= object
->get_local_mips16_fn_stub(r_sym
)->output_address();
9957 gold_assert(mips_sym
->need_fn_stub());
9958 if (mips_sym
->has_la25_stub())
9959 value
= target
->la25_stub_section()->stub_address(mips_sym
);
9962 value
= mips_sym
->template
9963 get_mips16_fn_stub
<big_endian
>()->output_address();
9966 symval
.set_output_value(value
);
9968 changed_symbol_value
= true;
9970 // The target is 16-bit, but the stub isn't.
9971 target_is_16_bit_code
= false;
9973 // If this is a MIPS16 call with a stub, that is made through the PLT or
9974 // to a standard MIPS function, we need to redirect the call to the stub.
9975 // Note that we specifically exclude R_MIPS16_CALL16 from this behavior;
9976 // indirect calls should use an indirect stub instead.
9977 else if (r_type
== elfcpp::R_MIPS16_26
&& !parameters
->options().relocatable()
9978 && ((mips_sym
!= NULL
9979 && (mips_sym
->has_mips16_call_stub()
9980 || mips_sym
->has_mips16_call_fp_stub()))
9981 || (mips_sym
== NULL
9982 && object
->get_local_mips16_call_stub(r_sym
) != NULL
))
9983 && ((mips_sym
!= NULL
&& mips_sym
->has_plt_offset())
9984 || !target_is_16_bit_code
))
9986 Mips16_stub_section
<size
, big_endian
>* call_stub
;
9987 if (mips_sym
== NULL
)
9988 call_stub
= object
->get_local_mips16_call_stub(r_sym
);
9991 // If both call_stub and call_fp_stub are defined, we can figure
9992 // out which one to use by checking which one appears in the input
9994 if (mips_sym
->has_mips16_call_stub()
9995 && mips_sym
->has_mips16_call_fp_stub())
9998 for (unsigned int i
= 1; i
< object
->shnum(); ++i
)
10000 if (object
->is_mips16_call_fp_stub_section(i
))
10002 call_stub
= mips_sym
->template
10003 get_mips16_call_fp_stub
<big_endian
>();
10008 if (call_stub
== NULL
)
10010 mips_sym
->template get_mips16_call_stub
<big_endian
>();
10012 else if (mips_sym
->has_mips16_call_stub())
10013 call_stub
= mips_sym
->template get_mips16_call_stub
<big_endian
>();
10015 call_stub
= mips_sym
->template get_mips16_call_fp_stub
<big_endian
>();
10018 symval
.set_output_value(call_stub
->output_address());
10020 changed_symbol_value
= true;
10022 // If this is a direct call to a PIC function, redirect to the
10024 else if (mips_sym
!= NULL
10025 && mips_sym
->has_la25_stub()
10026 && relocation_needs_la25_stub
<size
, big_endian
>(
10027 object
, r_type
, target_is_16_bit_code
))
10029 Mips_address value
= target
->la25_stub_section()->stub_address(mips_sym
);
10030 if (mips_sym
->is_micromips())
10032 symval
.set_output_value(value
);
10035 // For direct MIPS16 and microMIPS calls make sure the compressed PLT
10036 // entry is used if a standard PLT entry has also been made.
10037 else if ((r_type
== elfcpp::R_MIPS16_26
10038 || r_type
== elfcpp::R_MICROMIPS_26_S1
)
10039 && !parameters
->options().relocatable()
10040 && mips_sym
!= NULL
10041 && mips_sym
->has_plt_offset()
10042 && mips_sym
->has_comp_plt_offset()
10043 && mips_sym
->has_mips_plt_offset())
10045 Mips_address value
= (target
->plt_section()->comp_entry_address(mips_sym
)
10047 symval
.set_output_value(value
);
10050 target_is_16_bit_code
= !target
->is_output_micromips();
10051 target_is_micromips_code
= target
->is_output_micromips();
10054 // Make sure MIPS16 and microMIPS are not used together.
10055 if ((r_type
== elfcpp::R_MIPS16_26
&& target_is_micromips_code
)
10056 || (micromips_branch_reloc(r_type
) && target_is_16_bit_code
))
10058 gold_error(_("MIPS16 and microMIPS functions cannot call each other"));
10061 // Calls from 16-bit code to 32-bit code and vice versa require the
10062 // mode change. However, we can ignore calls to undefined weak symbols,
10063 // which should never be executed at runtime. This exception is important
10064 // because the assembly writer may have "known" that any definition of the
10065 // symbol would be 16-bit code, and that direct jumps were therefore
10068 (!parameters
->options().relocatable()
10069 && !(gsym
!= NULL
&& gsym
->is_weak_undefined())
10070 && ((r_type
== elfcpp::R_MIPS16_26
&& !target_is_16_bit_code
)
10071 || (r_type
== elfcpp::R_MICROMIPS_26_S1
&& !target_is_micromips_code
)
10072 || ((r_type
== elfcpp::R_MIPS_26
|| r_type
== elfcpp::R_MIPS_JALR
)
10073 && (target_is_16_bit_code
|| target_is_micromips_code
))));
10075 bool local
= (mips_sym
== NULL
10076 || (mips_sym
->got_only_for_calls()
10077 ? symbol_calls_local(mips_sym
, mips_sym
->has_dynsym_index())
10078 : symbol_references_local(mips_sym
,
10079 mips_sym
->has_dynsym_index())));
10081 // Global R_MIPS_GOT_PAGE/R_MICROMIPS_GOT_PAGE relocations are equivalent
10082 // to R_MIPS_GOT_DISP/R_MICROMIPS_GOT_DISP. The addend is applied by the
10083 // corresponding R_MIPS_GOT_OFST/R_MICROMIPS_GOT_OFST.
10084 if (got_page_reloc(r_type
) && !local
)
10085 r_type
= (micromips_reloc(r_type
) ? elfcpp::R_MICROMIPS_GOT_DISP
10086 : elfcpp::R_MIPS_GOT_DISP
);
10088 unsigned int got_offset
= 0;
10091 bool update_got_entry
= false;
10092 bool extract_addend
= rel_type
== elfcpp::SHT_REL
;
10095 case elfcpp::R_MIPS_NONE
:
10097 case elfcpp::R_MIPS_16
:
10098 reloc_status
= Reloc_funcs::rel16(view
, object
, psymval
, r_addend
,
10099 extract_addend
, r_type
);
10102 case elfcpp::R_MIPS_32
:
10103 if (should_apply_r_mips_32_reloc(mips_sym
, r_type
, output_section
,
10105 reloc_status
= Reloc_funcs::rel32(view
, object
, psymval
, r_addend
,
10106 extract_addend
, r_type
);
10107 if (mips_sym
!= NULL
10108 && (mips_sym
->is_mips16() || mips_sym
->is_micromips())
10109 && mips_sym
->global_got_area() == GGA_RELOC_ONLY
)
10111 // If mips_sym->has_mips16_fn_stub() is false, symbol value is
10112 // already updated by adding +1.
10113 if (mips_sym
->has_mips16_fn_stub())
10115 gold_assert(mips_sym
->need_fn_stub());
10116 Mips16_stub_section
<size
, big_endian
>* fn_stub
=
10117 mips_sym
->template get_mips16_fn_stub
<big_endian
>();
10119 symval
.set_output_value(fn_stub
->output_address());
10122 got_offset
= mips_sym
->global_gotoffset();
10123 update_got_entry
= true;
10127 case elfcpp::R_MIPS_REL32
:
10128 gold_unreachable();
10130 case elfcpp::R_MIPS_PC32
:
10131 reloc_status
= Reloc_funcs::relpc32(view
, object
, psymval
, address
,
10132 r_addend
, extract_addend
, r_type
);
10135 case elfcpp::R_MIPS16_26
:
10136 // The calculation for R_MIPS16_26 is just the same as for an
10137 // R_MIPS_26. It's only the storage of the relocated field into
10138 // the output file that's different. So, we just fall through to the
10139 // R_MIPS_26 case here.
10140 case elfcpp::R_MIPS_26
:
10141 case elfcpp::R_MICROMIPS_26_S1
:
10142 reloc_status
= Reloc_funcs::rel26(view
, object
, psymval
, address
,
10143 gsym
== NULL
, r_addend
, extract_addend
, gsym
, cross_mode_jump
, r_type
,
10144 target
->jal_to_bal());
10147 case elfcpp::R_MIPS_HI16
:
10148 case elfcpp::R_MIPS16_HI16
:
10149 case elfcpp::R_MICROMIPS_HI16
:
10150 reloc_status
= Reloc_funcs::relhi16(view
, object
, psymval
, r_addend
,
10151 address
, gp_disp
, r_type
, r_sym
,
10155 case elfcpp::R_MIPS_LO16
:
10156 case elfcpp::R_MIPS16_LO16
:
10157 case elfcpp::R_MICROMIPS_LO16
:
10158 case elfcpp::R_MICROMIPS_HI0_LO16
:
10159 reloc_status
= Reloc_funcs::rello16(target
, view
, object
, psymval
,
10160 r_addend
, extract_addend
, address
,
10161 gp_disp
, r_type
, r_sym
);
10164 case elfcpp::R_MIPS_LITERAL
:
10165 case elfcpp::R_MICROMIPS_LITERAL
:
10166 // Because we don't merge literal sections, we can handle this
10167 // just like R_MIPS_GPREL16. In the long run, we should merge
10168 // shared literals, and then we will need to additional work
10173 case elfcpp::R_MIPS_GPREL16
:
10174 case elfcpp::R_MIPS16_GPREL
:
10175 case elfcpp::R_MICROMIPS_GPREL7_S2
:
10176 case elfcpp::R_MICROMIPS_GPREL16
:
10177 reloc_status
= Reloc_funcs::relgprel(view
, object
, psymval
,
10178 target
->adjusted_gp_value(object
),
10179 r_addend
, extract_addend
,
10180 gsym
== NULL
, r_type
);
10183 case elfcpp::R_MIPS_PC16
:
10184 reloc_status
= Reloc_funcs::relpc16(view
, object
, psymval
, address
,
10185 r_addend
, extract_addend
, r_type
);
10187 case elfcpp::R_MICROMIPS_PC7_S1
:
10188 reloc_status
= Reloc_funcs::relmicromips_pc7_s1(view
, object
, psymval
,
10190 extract_addend
, r_type
);
10192 case elfcpp::R_MICROMIPS_PC10_S1
:
10193 reloc_status
= Reloc_funcs::relmicromips_pc10_s1(view
, object
, psymval
,
10195 extract_addend
, r_type
);
10197 case elfcpp::R_MICROMIPS_PC16_S1
:
10198 reloc_status
= Reloc_funcs::relmicromips_pc16_s1(view
, object
, psymval
,
10200 extract_addend
, r_type
);
10202 case elfcpp::R_MIPS_GPREL32
:
10203 reloc_status
= Reloc_funcs::relgprel32(view
, object
, psymval
,
10204 target
->adjusted_gp_value(object
),
10205 r_addend
, extract_addend
, r_type
);
10207 case elfcpp::R_MIPS_GOT_HI16
:
10208 case elfcpp::R_MIPS_CALL_HI16
:
10209 case elfcpp::R_MICROMIPS_GOT_HI16
:
10210 case elfcpp::R_MICROMIPS_CALL_HI16
:
10212 got_offset
= target
->got_section()->got_offset(gsym
, GOT_TYPE_STANDARD
,
10215 got_offset
= target
->got_section()->got_offset(r_sym
, GOT_TYPE_STANDARD
,
10217 gp_offset
= target
->got_section()->gp_offset(got_offset
, object
);
10218 reloc_status
= Reloc_funcs::relgot_hi16(view
, gp_offset
, r_type
);
10219 update_got_entry
= changed_symbol_value
;
10222 case elfcpp::R_MIPS_GOT_LO16
:
10223 case elfcpp::R_MIPS_CALL_LO16
:
10224 case elfcpp::R_MICROMIPS_GOT_LO16
:
10225 case elfcpp::R_MICROMIPS_CALL_LO16
:
10227 got_offset
= target
->got_section()->got_offset(gsym
, GOT_TYPE_STANDARD
,
10230 got_offset
= target
->got_section()->got_offset(r_sym
, GOT_TYPE_STANDARD
,
10232 gp_offset
= target
->got_section()->gp_offset(got_offset
, object
);
10233 reloc_status
= Reloc_funcs::relgot_lo16(view
, gp_offset
, r_type
);
10234 update_got_entry
= changed_symbol_value
;
10237 case elfcpp::R_MIPS_GOT_DISP
:
10238 case elfcpp::R_MICROMIPS_GOT_DISP
:
10240 got_offset
= target
->got_section()->got_offset(gsym
, GOT_TYPE_STANDARD
,
10243 got_offset
= target
->got_section()->got_offset(r_sym
, GOT_TYPE_STANDARD
,
10245 gp_offset
= target
->got_section()->gp_offset(got_offset
, object
);
10246 reloc_status
= Reloc_funcs::relgot(view
, gp_offset
, r_type
);
10249 case elfcpp::R_MIPS_CALL16
:
10250 case elfcpp::R_MIPS16_CALL16
:
10251 case elfcpp::R_MICROMIPS_CALL16
:
10252 gold_assert(gsym
!= NULL
);
10253 got_offset
= target
->got_section()->got_offset(gsym
, GOT_TYPE_STANDARD
,
10255 gp_offset
= target
->got_section()->gp_offset(got_offset
, object
);
10256 reloc_status
= Reloc_funcs::relgot(view
, gp_offset
, r_type
);
10257 // TODO(sasa): We should also initialize update_got_entry in other places
10258 // where relgot is called.
10259 update_got_entry
= changed_symbol_value
;
10262 case elfcpp::R_MIPS_GOT16
:
10263 case elfcpp::R_MIPS16_GOT16
:
10264 case elfcpp::R_MICROMIPS_GOT16
:
10267 got_offset
= target
->got_section()->got_offset(gsym
,
10270 gp_offset
= target
->got_section()->gp_offset(got_offset
, object
);
10271 reloc_status
= Reloc_funcs::relgot(view
, gp_offset
, r_type
);
10274 reloc_status
= Reloc_funcs::relgot16_local(view
, object
, psymval
,
10275 r_addend
, extract_addend
,
10277 update_got_entry
= changed_symbol_value
;
10280 case elfcpp::R_MIPS_TLS_GD
:
10281 case elfcpp::R_MIPS16_TLS_GD
:
10282 case elfcpp::R_MICROMIPS_TLS_GD
:
10284 got_offset
= target
->got_section()->got_offset(gsym
, GOT_TYPE_TLS_PAIR
,
10287 got_offset
= target
->got_section()->got_offset(r_sym
, GOT_TYPE_TLS_PAIR
,
10289 gp_offset
= target
->got_section()->gp_offset(got_offset
, object
);
10290 reloc_status
= Reloc_funcs::relgot(view
, gp_offset
, r_type
);
10293 case elfcpp::R_MIPS_TLS_GOTTPREL
:
10294 case elfcpp::R_MIPS16_TLS_GOTTPREL
:
10295 case elfcpp::R_MICROMIPS_TLS_GOTTPREL
:
10297 got_offset
= target
->got_section()->got_offset(gsym
,
10298 GOT_TYPE_TLS_OFFSET
,
10301 got_offset
= target
->got_section()->got_offset(r_sym
,
10302 GOT_TYPE_TLS_OFFSET
,
10304 gp_offset
= target
->got_section()->gp_offset(got_offset
, object
);
10305 reloc_status
= Reloc_funcs::relgot(view
, gp_offset
, r_type
);
10308 case elfcpp::R_MIPS_TLS_LDM
:
10309 case elfcpp::R_MIPS16_TLS_LDM
:
10310 case elfcpp::R_MICROMIPS_TLS_LDM
:
10311 // Relocate the field with the offset of the GOT entry for
10312 // the module index.
10313 got_offset
= target
->got_section()->tls_ldm_offset(object
);
10314 gp_offset
= target
->got_section()->gp_offset(got_offset
, object
);
10315 reloc_status
= Reloc_funcs::relgot(view
, gp_offset
, r_type
);
10318 case elfcpp::R_MIPS_GOT_PAGE
:
10319 case elfcpp::R_MICROMIPS_GOT_PAGE
:
10320 reloc_status
= Reloc_funcs::relgotpage(target
, view
, object
, psymval
,
10321 r_addend
, extract_addend
, r_type
);
10324 case elfcpp::R_MIPS_GOT_OFST
:
10325 case elfcpp::R_MICROMIPS_GOT_OFST
:
10326 reloc_status
= Reloc_funcs::relgotofst(target
, view
, object
, psymval
,
10327 r_addend
, extract_addend
, local
,
10331 case elfcpp::R_MIPS_JALR
:
10332 case elfcpp::R_MICROMIPS_JALR
:
10333 // This relocation is only a hint. In some cases, we optimize
10334 // it into a bal instruction. But we don't try to optimize
10335 // when the symbol does not resolve locally.
10336 if (gsym
== NULL
|| symbol_calls_local(gsym
, gsym
->has_dynsym_index()))
10337 reloc_status
= Reloc_funcs::reljalr(view
, object
, psymval
, address
,
10338 r_addend
, extract_addend
,
10339 cross_mode_jump
, r_type
,
10340 target
->jalr_to_bal(),
10341 target
->jr_to_b());
10344 case elfcpp::R_MIPS_TLS_DTPREL_HI16
:
10345 case elfcpp::R_MIPS16_TLS_DTPREL_HI16
:
10346 case elfcpp::R_MICROMIPS_TLS_DTPREL_HI16
:
10347 reloc_status
= Reloc_funcs::tlsrelhi16(view
, object
, psymval
,
10348 elfcpp::DTP_OFFSET
, r_addend
,
10349 extract_addend
, r_type
);
10351 case elfcpp::R_MIPS_TLS_DTPREL_LO16
:
10352 case elfcpp::R_MIPS16_TLS_DTPREL_LO16
:
10353 case elfcpp::R_MICROMIPS_TLS_DTPREL_LO16
:
10354 reloc_status
= Reloc_funcs::tlsrello16(view
, object
, psymval
,
10355 elfcpp::DTP_OFFSET
, r_addend
,
10356 extract_addend
, r_type
);
10358 case elfcpp::R_MIPS_TLS_DTPREL32
:
10359 case elfcpp::R_MIPS_TLS_DTPREL64
:
10360 reloc_status
= Reloc_funcs::tlsrel32(view
, object
, psymval
,
10361 elfcpp::DTP_OFFSET
, r_addend
,
10362 extract_addend
, r_type
);
10364 case elfcpp::R_MIPS_TLS_TPREL_HI16
:
10365 case elfcpp::R_MIPS16_TLS_TPREL_HI16
:
10366 case elfcpp::R_MICROMIPS_TLS_TPREL_HI16
:
10367 reloc_status
= Reloc_funcs::tlsrelhi16(view
, object
, psymval
,
10368 elfcpp::TP_OFFSET
, r_addend
,
10369 extract_addend
, r_type
);
10371 case elfcpp::R_MIPS_TLS_TPREL_LO16
:
10372 case elfcpp::R_MIPS16_TLS_TPREL_LO16
:
10373 case elfcpp::R_MICROMIPS_TLS_TPREL_LO16
:
10374 reloc_status
= Reloc_funcs::tlsrello16(view
, object
, psymval
,
10375 elfcpp::TP_OFFSET
, r_addend
,
10376 extract_addend
, r_type
);
10378 case elfcpp::R_MIPS_TLS_TPREL32
:
10379 case elfcpp::R_MIPS_TLS_TPREL64
:
10380 reloc_status
= Reloc_funcs::tlsrel32(view
, object
, psymval
,
10381 elfcpp::TP_OFFSET
, r_addend
,
10382 extract_addend
, r_type
);
10384 case elfcpp::R_MIPS_SUB
:
10385 case elfcpp::R_MICROMIPS_SUB
:
10386 reloc_status
= Reloc_funcs::relsub(view
, object
, psymval
, r_addend
,
10387 extract_addend
, r_type
);
10390 gold_error_at_location(relinfo
, relnum
, r_offset
,
10391 _("unsupported reloc %u"), r_type
);
10395 if (update_got_entry
)
10397 Mips_output_data_got
<size
, big_endian
>* got
= target
->got_section();
10398 if (mips_sym
!= NULL
&& mips_sym
->get_applied_secondary_got_fixup())
10399 got
->update_got_entry(got
->get_primary_got_offset(mips_sym
),
10400 psymval
->value(object
, 0));
10402 got
->update_got_entry(got_offset
, psymval
->value(object
, 0));
10405 // Report any errors.
10406 switch (reloc_status
)
10408 case Reloc_funcs::STATUS_OKAY
:
10410 case Reloc_funcs::STATUS_OVERFLOW
:
10411 gold_error_at_location(relinfo
, relnum
, r_offset
,
10412 _("relocation overflow"));
10414 case Reloc_funcs::STATUS_BAD_RELOC
:
10415 gold_error_at_location(relinfo
, relnum
, r_offset
,
10416 _("unexpected opcode while processing relocation"));
10419 gold_unreachable();
10425 // Get the Reference_flags for a particular relocation.
10427 template<int size
, bool big_endian
>
10429 Target_mips
<size
, big_endian
>::Scan::get_reference_flags(
10430 unsigned int r_type
)
10434 case elfcpp::R_MIPS_NONE
:
10435 // No symbol reference.
10438 case elfcpp::R_MIPS_16
:
10439 case elfcpp::R_MIPS_32
:
10440 case elfcpp::R_MIPS_64
:
10441 case elfcpp::R_MIPS_HI16
:
10442 case elfcpp::R_MIPS_LO16
:
10443 case elfcpp::R_MIPS16_HI16
:
10444 case elfcpp::R_MIPS16_LO16
:
10445 case elfcpp::R_MICROMIPS_HI16
:
10446 case elfcpp::R_MICROMIPS_LO16
:
10447 return Symbol::ABSOLUTE_REF
;
10449 case elfcpp::R_MIPS_26
:
10450 case elfcpp::R_MIPS16_26
:
10451 case elfcpp::R_MICROMIPS_26_S1
:
10452 return Symbol::FUNCTION_CALL
| Symbol::ABSOLUTE_REF
;
10454 case elfcpp::R_MIPS_GPREL32
:
10455 case elfcpp::R_MIPS_GPREL16
:
10456 case elfcpp::R_MIPS_REL32
:
10457 case elfcpp::R_MIPS16_GPREL
:
10458 return Symbol::RELATIVE_REF
;
10460 case elfcpp::R_MIPS_PC16
:
10461 case elfcpp::R_MIPS_PC32
:
10462 case elfcpp::R_MIPS_JALR
:
10463 case elfcpp::R_MICROMIPS_JALR
:
10464 return Symbol::FUNCTION_CALL
| Symbol::RELATIVE_REF
;
10466 case elfcpp::R_MIPS_GOT16
:
10467 case elfcpp::R_MIPS_CALL16
:
10468 case elfcpp::R_MIPS_GOT_DISP
:
10469 case elfcpp::R_MIPS_GOT_HI16
:
10470 case elfcpp::R_MIPS_GOT_LO16
:
10471 case elfcpp::R_MIPS_CALL_HI16
:
10472 case elfcpp::R_MIPS_CALL_LO16
:
10473 case elfcpp::R_MIPS_LITERAL
:
10474 case elfcpp::R_MIPS_GOT_PAGE
:
10475 case elfcpp::R_MIPS_GOT_OFST
:
10476 case elfcpp::R_MIPS16_GOT16
:
10477 case elfcpp::R_MIPS16_CALL16
:
10478 case elfcpp::R_MICROMIPS_GOT16
:
10479 case elfcpp::R_MICROMIPS_CALL16
:
10480 case elfcpp::R_MICROMIPS_GOT_HI16
:
10481 case elfcpp::R_MICROMIPS_GOT_LO16
:
10482 case elfcpp::R_MICROMIPS_CALL_HI16
:
10483 case elfcpp::R_MICROMIPS_CALL_LO16
:
10484 // Absolute in GOT.
10485 return Symbol::RELATIVE_REF
;
10487 case elfcpp::R_MIPS_TLS_DTPMOD32
:
10488 case elfcpp::R_MIPS_TLS_DTPREL32
:
10489 case elfcpp::R_MIPS_TLS_DTPMOD64
:
10490 case elfcpp::R_MIPS_TLS_DTPREL64
:
10491 case elfcpp::R_MIPS_TLS_GD
:
10492 case elfcpp::R_MIPS_TLS_LDM
:
10493 case elfcpp::R_MIPS_TLS_DTPREL_HI16
:
10494 case elfcpp::R_MIPS_TLS_DTPREL_LO16
:
10495 case elfcpp::R_MIPS_TLS_GOTTPREL
:
10496 case elfcpp::R_MIPS_TLS_TPREL32
:
10497 case elfcpp::R_MIPS_TLS_TPREL64
:
10498 case elfcpp::R_MIPS_TLS_TPREL_HI16
:
10499 case elfcpp::R_MIPS_TLS_TPREL_LO16
:
10500 case elfcpp::R_MIPS16_TLS_GD
:
10501 case elfcpp::R_MIPS16_TLS_GOTTPREL
:
10502 case elfcpp::R_MICROMIPS_TLS_GD
:
10503 case elfcpp::R_MICROMIPS_TLS_GOTTPREL
:
10504 case elfcpp::R_MICROMIPS_TLS_TPREL_HI16
:
10505 case elfcpp::R_MICROMIPS_TLS_TPREL_LO16
:
10506 return Symbol::TLS_REF
;
10508 case elfcpp::R_MIPS_COPY
:
10509 case elfcpp::R_MIPS_JUMP_SLOT
:
10511 gold_unreachable();
10512 // Not expected. We will give an error later.
10517 // Report an unsupported relocation against a local symbol.
10519 template<int size
, bool big_endian
>
10521 Target_mips
<size
, big_endian
>::Scan::unsupported_reloc_local(
10522 Sized_relobj_file
<size
, big_endian
>* object
,
10523 unsigned int r_type
)
10525 gold_error(_("%s: unsupported reloc %u against local symbol"),
10526 object
->name().c_str(), r_type
);
10529 // Report an unsupported relocation against a global symbol.
10531 template<int size
, bool big_endian
>
10533 Target_mips
<size
, big_endian
>::Scan::unsupported_reloc_global(
10534 Sized_relobj_file
<size
, big_endian
>* object
,
10535 unsigned int r_type
,
10538 gold_error(_("%s: unsupported reloc %u against global symbol %s"),
10539 object
->name().c_str(), r_type
, gsym
->demangled_name().c_str());
10542 // Return printable name for ABI.
10543 template<int size
, bool big_endian
>
10545 Target_mips
<size
, big_endian
>::elf_mips_abi_name(elfcpp::Elf_Word e_flags
,
10546 unsigned char ei_class
)
10548 switch (e_flags
& elfcpp::EF_MIPS_ABI
)
10551 if ((e_flags
& elfcpp::EF_MIPS_ABI2
) != 0)
10553 else if (elfcpp::abi_64(ei_class
))
10557 case elfcpp::E_MIPS_ABI_O32
:
10559 case elfcpp::E_MIPS_ABI_O64
:
10561 case elfcpp::E_MIPS_ABI_EABI32
:
10563 case elfcpp::E_MIPS_ABI_EABI64
:
10566 return "unknown abi";
10570 template<int size
, bool big_endian
>
10572 Target_mips
<size
, big_endian
>::elf_mips_mach_name(elfcpp::Elf_Word e_flags
)
10574 switch (e_flags
& elfcpp::EF_MIPS_MACH
)
10576 case elfcpp::E_MIPS_MACH_3900
:
10577 return "mips:3900";
10578 case elfcpp::E_MIPS_MACH_4010
:
10579 return "mips:4010";
10580 case elfcpp::E_MIPS_MACH_4100
:
10581 return "mips:4100";
10582 case elfcpp::E_MIPS_MACH_4111
:
10583 return "mips:4111";
10584 case elfcpp::E_MIPS_MACH_4120
:
10585 return "mips:4120";
10586 case elfcpp::E_MIPS_MACH_4650
:
10587 return "mips:4650";
10588 case elfcpp::E_MIPS_MACH_5400
:
10589 return "mips:5400";
10590 case elfcpp::E_MIPS_MACH_5500
:
10591 return "mips:5500";
10592 case elfcpp::E_MIPS_MACH_SB1
:
10594 case elfcpp::E_MIPS_MACH_9000
:
10595 return "mips:9000";
10596 case elfcpp::E_MIPS_MACH_LS2E
:
10597 return "mips:loongson-2e";
10598 case elfcpp::E_MIPS_MACH_LS2F
:
10599 return "mips:loongson-2f";
10600 case elfcpp::E_MIPS_MACH_LS3A
:
10601 return "mips:loongson-3a";
10602 case elfcpp::E_MIPS_MACH_OCTEON
:
10603 return "mips:octeon";
10604 case elfcpp::E_MIPS_MACH_OCTEON2
:
10605 return "mips:octeon2";
10606 case elfcpp::E_MIPS_MACH_XLR
:
10609 switch (e_flags
& elfcpp::EF_MIPS_ARCH
)
10612 case elfcpp::E_MIPS_ARCH_1
:
10613 return "mips:3000";
10615 case elfcpp::E_MIPS_ARCH_2
:
10616 return "mips:6000";
10618 case elfcpp::E_MIPS_ARCH_3
:
10619 return "mips:4000";
10621 case elfcpp::E_MIPS_ARCH_4
:
10622 return "mips:8000";
10624 case elfcpp::E_MIPS_ARCH_5
:
10625 return "mips:mips5";
10627 case elfcpp::E_MIPS_ARCH_32
:
10628 return "mips:isa32";
10630 case elfcpp::E_MIPS_ARCH_64
:
10631 return "mips:isa64";
10633 case elfcpp::E_MIPS_ARCH_32R2
:
10634 return "mips:isa32r2";
10636 case elfcpp::E_MIPS_ARCH_64R2
:
10637 return "mips:isa64r2";
10640 return "unknown CPU";
10643 template<int size
, bool big_endian
>
10644 const Target::Target_info Target_mips
<size
, big_endian
>::mips_info
=
10647 big_endian
, // is_big_endian
10648 elfcpp::EM_MIPS
, // machine_code
10649 true, // has_make_symbol
10650 false, // has_resolve
10651 false, // has_code_fill
10652 true, // is_default_stack_executable
10653 false, // can_icf_inline_merge_sections
10655 "/lib/ld.so.1", // dynamic_linker
10656 0x400000, // default_text_segment_address
10657 64 * 1024, // abi_pagesize (overridable by -z max-page-size)
10658 4 * 1024, // common_pagesize (overridable by -z common-page-size)
10659 false, // isolate_execinstr
10660 0, // rosegment_gap
10661 elfcpp::SHN_UNDEF
, // small_common_shndx
10662 elfcpp::SHN_UNDEF
, // large_common_shndx
10663 0, // small_common_section_flags
10664 0, // large_common_section_flags
10665 NULL
, // attributes_section
10666 NULL
, // attributes_vendor
10667 "__start", // entry_symbol_name
10668 32, // hash_entry_size
10671 template<int size
, bool big_endian
>
10672 class Target_mips_nacl
: public Target_mips
<size
, big_endian
>
10676 : Target_mips
<size
, big_endian
>(&mips_nacl_info
)
10680 static const Target::Target_info mips_nacl_info
;
10683 template<int size
, bool big_endian
>
10684 const Target::Target_info Target_mips_nacl
<size
, big_endian
>::mips_nacl_info
=
10687 big_endian
, // is_big_endian
10688 elfcpp::EM_MIPS
, // machine_code
10689 true, // has_make_symbol
10690 false, // has_resolve
10691 false, // has_code_fill
10692 true, // is_default_stack_executable
10693 false, // can_icf_inline_merge_sections
10695 "/lib/ld.so.1", // dynamic_linker
10696 0x20000, // default_text_segment_address
10697 0x10000, // abi_pagesize (overridable by -z max-page-size)
10698 0x10000, // common_pagesize (overridable by -z common-page-size)
10699 true, // isolate_execinstr
10700 0x10000000, // rosegment_gap
10701 elfcpp::SHN_UNDEF
, // small_common_shndx
10702 elfcpp::SHN_UNDEF
, // large_common_shndx
10703 0, // small_common_section_flags
10704 0, // large_common_section_flags
10705 NULL
, // attributes_section
10706 NULL
, // attributes_vendor
10707 "_start", // entry_symbol_name
10708 32, // hash_entry_size
10711 // Target selector for Mips. Note this is never instantiated directly.
10712 // It's only used in Target_selector_mips_nacl, below.
10714 template<int size
, bool big_endian
>
10715 class Target_selector_mips
: public Target_selector
10718 Target_selector_mips()
10719 : Target_selector(elfcpp::EM_MIPS
, size
, big_endian
,
10721 (big_endian
? "elf64-tradbigmips" : "elf64-tradlittlemips") :
10722 (big_endian
? "elf32-tradbigmips" : "elf32-tradlittlemips")),
10724 (big_endian
? "elf64-tradbigmips" : "elf64-tradlittlemips") :
10725 (big_endian
? "elf32-tradbigmips" : "elf32-tradlittlemips")))
10728 Target
* do_instantiate_target()
10729 { return new Target_mips
<size
, big_endian
>(); }
10732 template<int size
, bool big_endian
>
10733 class Target_selector_mips_nacl
10734 : public Target_selector_nacl
<Target_selector_mips
<size
, big_endian
>,
10735 Target_mips_nacl
<size
, big_endian
> >
10738 Target_selector_mips_nacl()
10739 : Target_selector_nacl
<Target_selector_mips
<size
, big_endian
>,
10740 Target_mips_nacl
<size
, big_endian
> >(
10741 // NaCl currently supports only MIPS32 little-endian.
10742 "mipsel", "elf32-tradlittlemips-nacl", "elf32-tradlittlemips-nacl")
10746 Target_selector_mips_nacl
<32, true> target_selector_mips32
;
10747 Target_selector_mips_nacl
<32, false> target_selector_mips32el
;
10748 Target_selector_mips_nacl
<64, true> target_selector_mips64
;
10749 Target_selector_mips_nacl
<64, false> target_selector_mips64el
;
10751 } // End anonymous namespace.