1 /* MIPS-specific support for ELF
2 Copyright (C) 1993-2016 Free Software Foundation, Inc.
4 Most of the information added by Ian Lance Taylor, Cygnus Support,
6 N32/64 ABI support added by Mark Mitchell, CodeSourcery, LLC.
7 <mark@codesourcery.com>
8 Traditional MIPS targets support added by Koundinya.K, Dansk Data
9 Elektronik & Operations Research Group. <kk@ddeorg.soft.net>
11 This file is part of BFD, the Binary File Descriptor library.
13 This program is free software; you can redistribute it and/or modify
14 it under the terms of the GNU General Public License as published by
15 the Free Software Foundation; either version 3 of the License, or
16 (at your option) any later version.
18 This program is distributed in the hope that it will be useful,
19 but WITHOUT ANY WARRANTY; without even the implied warranty of
20 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
21 GNU General Public License for more details.
23 You should have received a copy of the GNU General Public License
24 along with this program; if not, write to the Free Software
25 Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston,
26 MA 02110-1301, USA. */
29 /* This file handles functionality common to the different MIPS ABI's. */
34 #include "libiberty.h"
36 #include "elfxx-mips.h"
38 #include "elf-vxworks.h"
41 /* Get the ECOFF swapping routines. */
43 #include "coff/symconst.h"
44 #include "coff/ecoff.h"
45 #include "coff/mips.h"
49 /* Types of TLS GOT entry. */
50 enum mips_got_tls_type {
57 /* This structure is used to hold information about one GOT entry.
58 There are four types of entry:
60 (1) an absolute address
61 requires: abfd == NULL
64 (2) a SYMBOL + OFFSET address, where SYMBOL is local to an input bfd
65 requires: abfd != NULL, symndx >= 0, tls_type != GOT_TLS_LDM
66 fields: abfd, symndx, d.addend, tls_type
68 (3) a SYMBOL address, where SYMBOL is not local to an input bfd
69 requires: abfd != NULL, symndx == -1
73 requires: abfd != NULL, symndx == 0, tls_type == GOT_TLS_LDM
74 fields: none; there's only one of these per GOT. */
77 /* One input bfd that needs the GOT entry. */
79 /* The index of the symbol, as stored in the relocation r_info, if
80 we have a local symbol; -1 otherwise. */
84 /* If abfd == NULL, an address that must be stored in the got. */
86 /* If abfd != NULL && symndx != -1, the addend of the relocation
87 that should be added to the symbol value. */
89 /* If abfd != NULL && symndx == -1, the hash table entry
90 corresponding to a symbol in the GOT. The symbol's entry
91 is in the local area if h->global_got_area is GGA_NONE,
92 otherwise it is in the global area. */
93 struct mips_elf_link_hash_entry *h;
96 /* The TLS type of this GOT entry. An LDM GOT entry will be a local
97 symbol entry with r_symndx == 0. */
98 unsigned char tls_type;
100 /* True if we have filled in the GOT contents for a TLS entry,
101 and created the associated relocations. */
102 unsigned char tls_initialized;
104 /* The offset from the beginning of the .got section to the entry
105 corresponding to this symbol+addend. If it's a global symbol
106 whose offset is yet to be decided, it's going to be -1. */
110 /* This structure represents a GOT page reference from an input bfd.
111 Each instance represents a symbol + ADDEND, where the representation
112 of the symbol depends on whether it is local to the input bfd.
113 If it is, then SYMNDX >= 0, and the symbol has index SYMNDX in U.ABFD.
114 Otherwise, SYMNDX < 0 and U.H points to the symbol's hash table entry.
116 Page references with SYMNDX >= 0 always become page references
117 in the output. Page references with SYMNDX < 0 only become page
118 references if the symbol binds locally; in other cases, the page
119 reference decays to a global GOT reference. */
120 struct mips_got_page_ref
125 struct mips_elf_link_hash_entry *h;
131 /* This structure describes a range of addends: [MIN_ADDEND, MAX_ADDEND].
132 The structures form a non-overlapping list that is sorted by increasing
134 struct mips_got_page_range
136 struct mips_got_page_range *next;
137 bfd_signed_vma min_addend;
138 bfd_signed_vma max_addend;
141 /* This structure describes the range of addends that are applied to page
142 relocations against a given section. */
143 struct mips_got_page_entry
145 /* The section that these entries are based on. */
147 /* The ranges for this page entry. */
148 struct mips_got_page_range *ranges;
149 /* The maximum number of page entries needed for RANGES. */
153 /* This structure is used to hold .got information when linking. */
157 /* The number of global .got entries. */
158 unsigned int global_gotno;
159 /* The number of global .got entries that are in the GGA_RELOC_ONLY area. */
160 unsigned int reloc_only_gotno;
161 /* The number of .got slots used for TLS. */
162 unsigned int tls_gotno;
163 /* The first unused TLS .got entry. Used only during
164 mips_elf_initialize_tls_index. */
165 unsigned int tls_assigned_gotno;
166 /* The number of local .got entries, eventually including page entries. */
167 unsigned int local_gotno;
168 /* The maximum number of page entries needed. */
169 unsigned int page_gotno;
170 /* The number of relocations needed for the GOT entries. */
172 /* The first unused local .got entry. */
173 unsigned int assigned_low_gotno;
174 /* The last unused local .got entry. */
175 unsigned int assigned_high_gotno;
176 /* A hash table holding members of the got. */
177 struct htab *got_entries;
178 /* A hash table holding mips_got_page_ref structures. */
179 struct htab *got_page_refs;
180 /* A hash table of mips_got_page_entry structures. */
181 struct htab *got_page_entries;
182 /* In multi-got links, a pointer to the next got (err, rather, most
183 of the time, it points to the previous got). */
184 struct mips_got_info *next;
187 /* Structure passed when merging bfds' gots. */
189 struct mips_elf_got_per_bfd_arg
191 /* The output bfd. */
193 /* The link information. */
194 struct bfd_link_info *info;
195 /* A pointer to the primary got, i.e., the one that's going to get
196 the implicit relocations from DT_MIPS_LOCAL_GOTNO and
198 struct mips_got_info *primary;
199 /* A non-primary got we're trying to merge with other input bfd's
201 struct mips_got_info *current;
202 /* The maximum number of got entries that can be addressed with a
204 unsigned int max_count;
205 /* The maximum number of page entries needed by each got. */
206 unsigned int max_pages;
207 /* The total number of global entries which will live in the
208 primary got and be automatically relocated. This includes
209 those not referenced by the primary GOT but included in
211 unsigned int global_count;
214 /* A structure used to pass information to htab_traverse callbacks
215 when laying out the GOT. */
217 struct mips_elf_traverse_got_arg
219 struct bfd_link_info *info;
220 struct mips_got_info *g;
224 struct _mips_elf_section_data
226 struct bfd_elf_section_data elf;
233 #define mips_elf_section_data(sec) \
234 ((struct _mips_elf_section_data *) elf_section_data (sec))
236 #define is_mips_elf(bfd) \
237 (bfd_get_flavour (bfd) == bfd_target_elf_flavour \
238 && elf_tdata (bfd) != NULL \
239 && elf_object_id (bfd) == MIPS_ELF_DATA)
241 /* The ABI says that every symbol used by dynamic relocations must have
242 a global GOT entry. Among other things, this provides the dynamic
243 linker with a free, directly-indexed cache. The GOT can therefore
244 contain symbols that are not referenced by GOT relocations themselves
245 (in other words, it may have symbols that are not referenced by things
246 like R_MIPS_GOT16 and R_MIPS_GOT_PAGE).
248 GOT relocations are less likely to overflow if we put the associated
249 GOT entries towards the beginning. We therefore divide the global
250 GOT entries into two areas: "normal" and "reloc-only". Entries in
251 the first area can be used for both dynamic relocations and GP-relative
252 accesses, while those in the "reloc-only" area are for dynamic
255 These GGA_* ("Global GOT Area") values are organised so that lower
256 values are more general than higher values. Also, non-GGA_NONE
257 values are ordered by the position of the area in the GOT. */
259 #define GGA_RELOC_ONLY 1
262 /* Information about a non-PIC interface to a PIC function. There are
263 two ways of creating these interfaces. The first is to add:
266 addiu $25,$25,%lo(func)
268 immediately before a PIC function "func". The second is to add:
272 addiu $25,$25,%lo(func)
274 to a separate trampoline section.
276 Stubs of the first kind go in a new section immediately before the
277 target function. Stubs of the second kind go in a single section
278 pointed to by the hash table's "strampoline" field. */
279 struct mips_elf_la25_stub {
280 /* The generated section that contains this stub. */
281 asection *stub_section;
283 /* The offset of the stub from the start of STUB_SECTION. */
286 /* One symbol for the original function. Its location is available
287 in H->root.root.u.def. */
288 struct mips_elf_link_hash_entry *h;
291 /* Macros for populating a mips_elf_la25_stub. */
293 #define LA25_LUI(VAL) (0x3c190000 | (VAL)) /* lui t9,VAL */
294 #define LA25_J(VAL) (0x08000000 | (((VAL) >> 2) & 0x3ffffff)) /* j VAL */
295 #define LA25_ADDIU(VAL) (0x27390000 | (VAL)) /* addiu t9,t9,VAL */
296 #define LA25_LUI_MICROMIPS(VAL) \
297 (0x41b90000 | (VAL)) /* lui t9,VAL */
298 #define LA25_J_MICROMIPS(VAL) \
299 (0xd4000000 | (((VAL) >> 1) & 0x3ffffff)) /* j VAL */
300 #define LA25_ADDIU_MICROMIPS(VAL) \
301 (0x33390000 | (VAL)) /* addiu t9,t9,VAL */
303 /* This structure is passed to mips_elf_sort_hash_table_f when sorting
304 the dynamic symbols. */
306 struct mips_elf_hash_sort_data
308 /* The symbol in the global GOT with the lowest dynamic symbol table
310 struct elf_link_hash_entry *low;
311 /* The least dynamic symbol table index corresponding to a non-TLS
312 symbol with a GOT entry. */
313 long min_got_dynindx;
314 /* The greatest dynamic symbol table index corresponding to a symbol
315 with a GOT entry that is not referenced (e.g., a dynamic symbol
316 with dynamic relocations pointing to it from non-primary GOTs). */
317 long max_unref_got_dynindx;
318 /* The greatest dynamic symbol table index not corresponding to a
319 symbol without a GOT entry. */
320 long max_non_got_dynindx;
323 /* We make up to two PLT entries if needed, one for standard MIPS code
324 and one for compressed code, either a MIPS16 or microMIPS one. We
325 keep a separate record of traditional lazy-binding stubs, for easier
330 /* Traditional SVR4 stub offset, or -1 if none. */
333 /* Standard PLT entry offset, or -1 if none. */
336 /* Compressed PLT entry offset, or -1 if none. */
339 /* The corresponding .got.plt index, or -1 if none. */
340 bfd_vma gotplt_index;
342 /* Whether we need a standard PLT entry. */
343 unsigned int need_mips : 1;
345 /* Whether we need a compressed PLT entry. */
346 unsigned int need_comp : 1;
349 /* The MIPS ELF linker needs additional information for each symbol in
350 the global hash table. */
352 struct mips_elf_link_hash_entry
354 struct elf_link_hash_entry root;
356 /* External symbol information. */
359 /* The la25 stub we have created for ths symbol, if any. */
360 struct mips_elf_la25_stub *la25_stub;
362 /* Number of R_MIPS_32, R_MIPS_REL32, or R_MIPS_64 relocs against
364 unsigned int possibly_dynamic_relocs;
366 /* If there is a stub that 32 bit functions should use to call this
367 16 bit function, this points to the section containing the stub. */
370 /* If there is a stub that 16 bit functions should use to call this
371 32 bit function, this points to the section containing the stub. */
374 /* This is like the call_stub field, but it is used if the function
375 being called returns a floating point value. */
376 asection *call_fp_stub;
378 /* The highest GGA_* value that satisfies all references to this symbol. */
379 unsigned int global_got_area : 2;
381 /* True if all GOT relocations against this symbol are for calls. This is
382 a looser condition than no_fn_stub below, because there may be other
383 non-call non-GOT relocations against the symbol. */
384 unsigned int got_only_for_calls : 1;
386 /* True if one of the relocations described by possibly_dynamic_relocs
387 is against a readonly section. */
388 unsigned int readonly_reloc : 1;
390 /* True if there is a relocation against this symbol that must be
391 resolved by the static linker (in other words, if the relocation
392 cannot possibly be made dynamic). */
393 unsigned int has_static_relocs : 1;
395 /* True if we must not create a .MIPS.stubs entry for this symbol.
396 This is set, for example, if there are relocations related to
397 taking the function's address, i.e. any but R_MIPS_CALL*16 ones.
398 See "MIPS ABI Supplement, 3rd Edition", p. 4-20. */
399 unsigned int no_fn_stub : 1;
401 /* Whether we need the fn_stub; this is true if this symbol appears
402 in any relocs other than a 16 bit call. */
403 unsigned int need_fn_stub : 1;
405 /* True if this symbol is referenced by branch relocations from
406 any non-PIC input file. This is used to determine whether an
407 la25 stub is required. */
408 unsigned int has_nonpic_branches : 1;
410 /* Does this symbol need a traditional MIPS lazy-binding stub
411 (as opposed to a PLT entry)? */
412 unsigned int needs_lazy_stub : 1;
414 /* Does this symbol resolve to a PLT entry? */
415 unsigned int use_plt_entry : 1;
418 /* MIPS ELF linker hash table. */
420 struct mips_elf_link_hash_table
422 struct elf_link_hash_table root;
424 /* The number of .rtproc entries. */
425 bfd_size_type procedure_count;
427 /* The size of the .compact_rel section (if SGI_COMPAT). */
428 bfd_size_type compact_rel_size;
430 /* This flag indicates that the value of DT_MIPS_RLD_MAP dynamic entry
431 is set to the address of __rld_obj_head as in IRIX5 and IRIX6. */
432 bfd_boolean use_rld_obj_head;
434 /* The __rld_map or __rld_obj_head symbol. */
435 struct elf_link_hash_entry *rld_symbol;
437 /* This is set if we see any mips16 stub sections. */
438 bfd_boolean mips16_stubs_seen;
440 /* True if we can generate copy relocs and PLTs. */
441 bfd_boolean use_plts_and_copy_relocs;
443 /* True if we can only use 32-bit microMIPS instructions. */
446 /* True if we're generating code for VxWorks. */
447 bfd_boolean is_vxworks;
449 /* True if we already reported the small-data section overflow. */
450 bfd_boolean small_data_overflow_reported;
452 /* Shortcuts to some dynamic sections, or NULL if they are not
463 /* The master GOT information. */
464 struct mips_got_info *got_info;
466 /* The global symbol in the GOT with the lowest index in the dynamic
468 struct elf_link_hash_entry *global_gotsym;
470 /* The size of the PLT header in bytes. */
471 bfd_vma plt_header_size;
473 /* The size of a standard PLT entry in bytes. */
474 bfd_vma plt_mips_entry_size;
476 /* The size of a compressed PLT entry in bytes. */
477 bfd_vma plt_comp_entry_size;
479 /* The offset of the next standard PLT entry to create. */
480 bfd_vma plt_mips_offset;
482 /* The offset of the next compressed PLT entry to create. */
483 bfd_vma plt_comp_offset;
485 /* The index of the next .got.plt entry to create. */
486 bfd_vma plt_got_index;
488 /* The number of functions that need a lazy-binding stub. */
489 bfd_vma lazy_stub_count;
491 /* The size of a function stub entry in bytes. */
492 bfd_vma function_stub_size;
494 /* The number of reserved entries at the beginning of the GOT. */
495 unsigned int reserved_gotno;
497 /* The section used for mips_elf_la25_stub trampolines.
498 See the comment above that structure for details. */
499 asection *strampoline;
501 /* A table of mips_elf_la25_stubs, indexed by (input_section, offset)
505 /* A function FN (NAME, IS, OS) that creates a new input section
506 called NAME and links it to output section OS. If IS is nonnull,
507 the new section should go immediately before it, otherwise it
508 should go at the (current) beginning of OS.
510 The function returns the new section on success, otherwise it
512 asection *(*add_stub_section) (const char *, asection *, asection *);
514 /* Small local sym cache. */
515 struct sym_cache sym_cache;
517 /* Is the PLT header compressed? */
518 unsigned int plt_header_is_comp : 1;
521 /* Get the MIPS ELF linker hash table from a link_info structure. */
523 #define mips_elf_hash_table(p) \
524 (elf_hash_table_id ((struct elf_link_hash_table *) ((p)->hash)) \
525 == MIPS_ELF_DATA ? ((struct mips_elf_link_hash_table *) ((p)->hash)) : NULL)
527 /* A structure used to communicate with htab_traverse callbacks. */
528 struct mips_htab_traverse_info
530 /* The usual link-wide information. */
531 struct bfd_link_info *info;
534 /* Starts off FALSE and is set to TRUE if the link should be aborted. */
538 /* MIPS ELF private object data. */
540 struct mips_elf_obj_tdata
542 /* Generic ELF private object data. */
543 struct elf_obj_tdata root;
545 /* Input BFD providing Tag_GNU_MIPS_ABI_FP attribute for output. */
548 /* Input BFD providing Tag_GNU_MIPS_ABI_MSA attribute for output. */
551 /* The abiflags for this object. */
552 Elf_Internal_ABIFlags_v0 abiflags;
553 bfd_boolean abiflags_valid;
555 /* The GOT requirements of input bfds. */
556 struct mips_got_info *got;
558 /* Used by _bfd_mips_elf_find_nearest_line. The structure could be
559 included directly in this one, but there's no point to wasting
560 the memory just for the infrequently called find_nearest_line. */
561 struct mips_elf_find_line *find_line_info;
563 /* An array of stub sections indexed by symbol number. */
564 asection **local_stubs;
565 asection **local_call_stubs;
567 /* The Irix 5 support uses two virtual sections, which represent
568 text/data symbols defined in dynamic objects. */
569 asymbol *elf_data_symbol;
570 asymbol *elf_text_symbol;
571 asection *elf_data_section;
572 asection *elf_text_section;
575 /* Get MIPS ELF private object data from BFD's tdata. */
577 #define mips_elf_tdata(bfd) \
578 ((struct mips_elf_obj_tdata *) (bfd)->tdata.any)
580 #define TLS_RELOC_P(r_type) \
581 (r_type == R_MIPS_TLS_DTPMOD32 \
582 || r_type == R_MIPS_TLS_DTPMOD64 \
583 || r_type == R_MIPS_TLS_DTPREL32 \
584 || r_type == R_MIPS_TLS_DTPREL64 \
585 || r_type == R_MIPS_TLS_GD \
586 || r_type == R_MIPS_TLS_LDM \
587 || r_type == R_MIPS_TLS_DTPREL_HI16 \
588 || r_type == R_MIPS_TLS_DTPREL_LO16 \
589 || r_type == R_MIPS_TLS_GOTTPREL \
590 || r_type == R_MIPS_TLS_TPREL32 \
591 || r_type == R_MIPS_TLS_TPREL64 \
592 || r_type == R_MIPS_TLS_TPREL_HI16 \
593 || r_type == R_MIPS_TLS_TPREL_LO16 \
594 || r_type == R_MIPS16_TLS_GD \
595 || r_type == R_MIPS16_TLS_LDM \
596 || r_type == R_MIPS16_TLS_DTPREL_HI16 \
597 || r_type == R_MIPS16_TLS_DTPREL_LO16 \
598 || r_type == R_MIPS16_TLS_GOTTPREL \
599 || r_type == R_MIPS16_TLS_TPREL_HI16 \
600 || r_type == R_MIPS16_TLS_TPREL_LO16 \
601 || r_type == R_MICROMIPS_TLS_GD \
602 || r_type == R_MICROMIPS_TLS_LDM \
603 || r_type == R_MICROMIPS_TLS_DTPREL_HI16 \
604 || r_type == R_MICROMIPS_TLS_DTPREL_LO16 \
605 || r_type == R_MICROMIPS_TLS_GOTTPREL \
606 || r_type == R_MICROMIPS_TLS_TPREL_HI16 \
607 || r_type == R_MICROMIPS_TLS_TPREL_LO16)
609 /* Structure used to pass information to mips_elf_output_extsym. */
614 struct bfd_link_info *info;
615 struct ecoff_debug_info *debug;
616 const struct ecoff_debug_swap *swap;
620 /* The names of the runtime procedure table symbols used on IRIX5. */
622 static const char * const mips_elf_dynsym_rtproc_names[] =
625 "_procedure_string_table",
626 "_procedure_table_size",
630 /* These structures are used to generate the .compact_rel section on
635 unsigned long id1; /* Always one? */
636 unsigned long num; /* Number of compact relocation entries. */
637 unsigned long id2; /* Always two? */
638 unsigned long offset; /* The file offset of the first relocation. */
639 unsigned long reserved0; /* Zero? */
640 unsigned long reserved1; /* Zero? */
649 bfd_byte reserved0[4];
650 bfd_byte reserved1[4];
651 } Elf32_External_compact_rel;
655 unsigned int ctype : 1; /* 1: long 0: short format. See below. */
656 unsigned int rtype : 4; /* Relocation types. See below. */
657 unsigned int dist2to : 8;
658 unsigned int relvaddr : 19; /* (VADDR - vaddr of the previous entry)/ 4 */
659 unsigned long konst; /* KONST field. See below. */
660 unsigned long vaddr; /* VADDR to be relocated. */
665 unsigned int ctype : 1; /* 1: long 0: short format. See below. */
666 unsigned int rtype : 4; /* Relocation types. See below. */
667 unsigned int dist2to : 8;
668 unsigned int relvaddr : 19; /* (VADDR - vaddr of the previous entry)/ 4 */
669 unsigned long konst; /* KONST field. See below. */
677 } Elf32_External_crinfo;
683 } Elf32_External_crinfo2;
685 /* These are the constants used to swap the bitfields in a crinfo. */
687 #define CRINFO_CTYPE (0x1)
688 #define CRINFO_CTYPE_SH (31)
689 #define CRINFO_RTYPE (0xf)
690 #define CRINFO_RTYPE_SH (27)
691 #define CRINFO_DIST2TO (0xff)
692 #define CRINFO_DIST2TO_SH (19)
693 #define CRINFO_RELVADDR (0x7ffff)
694 #define CRINFO_RELVADDR_SH (0)
696 /* A compact relocation info has long (3 words) or short (2 words)
697 formats. A short format doesn't have VADDR field and relvaddr
698 fields contains ((VADDR - vaddr of the previous entry) >> 2). */
699 #define CRF_MIPS_LONG 1
700 #define CRF_MIPS_SHORT 0
702 /* There are 4 types of compact relocation at least. The value KONST
703 has different meaning for each type:
706 CT_MIPS_REL32 Address in data
707 CT_MIPS_WORD Address in word (XXX)
708 CT_MIPS_GPHI_LO GP - vaddr
709 CT_MIPS_JMPAD Address to jump
712 #define CRT_MIPS_REL32 0xa
713 #define CRT_MIPS_WORD 0xb
714 #define CRT_MIPS_GPHI_LO 0xc
715 #define CRT_MIPS_JMPAD 0xd
717 #define mips_elf_set_cr_format(x,format) ((x).ctype = (format))
718 #define mips_elf_set_cr_type(x,type) ((x).rtype = (type))
719 #define mips_elf_set_cr_dist2to(x,v) ((x).dist2to = (v))
720 #define mips_elf_set_cr_relvaddr(x,d) ((x).relvaddr = (d)<<2)
722 /* The structure of the runtime procedure descriptor created by the
723 loader for use by the static exception system. */
725 typedef struct runtime_pdr {
726 bfd_vma adr; /* Memory address of start of procedure. */
727 long regmask; /* Save register mask. */
728 long regoffset; /* Save register offset. */
729 long fregmask; /* Save floating point register mask. */
730 long fregoffset; /* Save floating point register offset. */
731 long frameoffset; /* Frame size. */
732 short framereg; /* Frame pointer register. */
733 short pcreg; /* Offset or reg of return pc. */
734 long irpss; /* Index into the runtime string table. */
736 struct exception_info *exception_info;/* Pointer to exception array. */
738 #define cbRPDR sizeof (RPDR)
739 #define rpdNil ((pRPDR) 0)
741 static struct mips_got_entry *mips_elf_create_local_got_entry
742 (bfd *, struct bfd_link_info *, bfd *, bfd_vma, unsigned long,
743 struct mips_elf_link_hash_entry *, int);
744 static bfd_boolean mips_elf_sort_hash_table_f
745 (struct mips_elf_link_hash_entry *, void *);
746 static bfd_vma mips_elf_high
748 static bfd_boolean mips_elf_create_dynamic_relocation
749 (bfd *, struct bfd_link_info *, const Elf_Internal_Rela *,
750 struct mips_elf_link_hash_entry *, asection *, bfd_vma,
751 bfd_vma *, asection *);
752 static bfd_vma mips_elf_adjust_gp
753 (bfd *, struct mips_got_info *, bfd *);
755 /* This will be used when we sort the dynamic relocation records. */
756 static bfd *reldyn_sorting_bfd;
758 /* True if ABFD is for CPUs with load interlocking that include
759 non-MIPS1 CPUs and R3900. */
760 #define LOAD_INTERLOCKS_P(abfd) \
761 ( ((elf_elfheader (abfd)->e_flags & EF_MIPS_ARCH) != E_MIPS_ARCH_1) \
762 || ((elf_elfheader (abfd)->e_flags & EF_MIPS_MACH) == E_MIPS_MACH_3900))
764 /* True if ABFD is for CPUs that are faster if JAL is converted to BAL.
765 This should be safe for all architectures. We enable this predicate
766 for RM9000 for now. */
767 #define JAL_TO_BAL_P(abfd) \
768 ((elf_elfheader (abfd)->e_flags & EF_MIPS_MACH) == E_MIPS_MACH_9000)
770 /* True if ABFD is for CPUs that are faster if JALR is converted to BAL.
771 This should be safe for all architectures. We enable this predicate for
773 #define JALR_TO_BAL_P(abfd) 1
775 /* True if ABFD is for CPUs that are faster if JR is converted to B.
776 This should be safe for all architectures. We enable this predicate for
778 #define JR_TO_B_P(abfd) 1
780 /* True if ABFD is a PIC object. */
781 #define PIC_OBJECT_P(abfd) \
782 ((elf_elfheader (abfd)->e_flags & EF_MIPS_PIC) != 0)
784 /* Nonzero if ABFD is using the O32 ABI. */
785 #define ABI_O32_P(abfd) \
786 ((elf_elfheader (abfd)->e_flags & EF_MIPS_ABI) == E_MIPS_ABI_O32)
788 /* Nonzero if ABFD is using the N32 ABI. */
789 #define ABI_N32_P(abfd) \
790 ((elf_elfheader (abfd)->e_flags & EF_MIPS_ABI2) != 0)
792 /* Nonzero if ABFD is using the N64 ABI. */
793 #define ABI_64_P(abfd) \
794 (get_elf_backend_data (abfd)->s->elfclass == ELFCLASS64)
796 /* Nonzero if ABFD is using NewABI conventions. */
797 #define NEWABI_P(abfd) (ABI_N32_P (abfd) || ABI_64_P (abfd))
799 /* Nonzero if ABFD has microMIPS code. */
800 #define MICROMIPS_P(abfd) \
801 ((elf_elfheader (abfd)->e_flags & EF_MIPS_ARCH_ASE_MICROMIPS) != 0)
803 /* Nonzero if ABFD is MIPS R6. */
804 #define MIPSR6_P(abfd) \
805 ((elf_elfheader (abfd)->e_flags & EF_MIPS_ARCH) == E_MIPS_ARCH_32R6 \
806 || (elf_elfheader (abfd)->e_flags & EF_MIPS_ARCH) == E_MIPS_ARCH_64R6)
808 /* The IRIX compatibility level we are striving for. */
809 #define IRIX_COMPAT(abfd) \
810 (get_elf_backend_data (abfd)->elf_backend_mips_irix_compat (abfd))
812 /* Whether we are trying to be compatible with IRIX at all. */
813 #define SGI_COMPAT(abfd) \
814 (IRIX_COMPAT (abfd) != ict_none)
816 /* The name of the options section. */
817 #define MIPS_ELF_OPTIONS_SECTION_NAME(abfd) \
818 (NEWABI_P (abfd) ? ".MIPS.options" : ".options")
820 /* True if NAME is the recognized name of any SHT_MIPS_OPTIONS section.
821 Some IRIX system files do not use MIPS_ELF_OPTIONS_SECTION_NAME. */
822 #define MIPS_ELF_OPTIONS_SECTION_NAME_P(NAME) \
823 (strcmp (NAME, ".MIPS.options") == 0 || strcmp (NAME, ".options") == 0)
825 /* True if NAME is the recognized name of any SHT_MIPS_ABIFLAGS section. */
826 #define MIPS_ELF_ABIFLAGS_SECTION_NAME_P(NAME) \
827 (strcmp (NAME, ".MIPS.abiflags") == 0)
829 /* Whether the section is readonly. */
830 #define MIPS_ELF_READONLY_SECTION(sec) \
831 ((sec->flags & (SEC_ALLOC | SEC_LOAD | SEC_READONLY)) \
832 == (SEC_ALLOC | SEC_LOAD | SEC_READONLY))
834 /* The name of the stub section. */
835 #define MIPS_ELF_STUB_SECTION_NAME(abfd) ".MIPS.stubs"
837 /* The size of an external REL relocation. */
838 #define MIPS_ELF_REL_SIZE(abfd) \
839 (get_elf_backend_data (abfd)->s->sizeof_rel)
841 /* The size of an external RELA relocation. */
842 #define MIPS_ELF_RELA_SIZE(abfd) \
843 (get_elf_backend_data (abfd)->s->sizeof_rela)
845 /* The size of an external dynamic table entry. */
846 #define MIPS_ELF_DYN_SIZE(abfd) \
847 (get_elf_backend_data (abfd)->s->sizeof_dyn)
849 /* The size of a GOT entry. */
850 #define MIPS_ELF_GOT_SIZE(abfd) \
851 (get_elf_backend_data (abfd)->s->arch_size / 8)
853 /* The size of the .rld_map section. */
854 #define MIPS_ELF_RLD_MAP_SIZE(abfd) \
855 (get_elf_backend_data (abfd)->s->arch_size / 8)
857 /* The size of a symbol-table entry. */
858 #define MIPS_ELF_SYM_SIZE(abfd) \
859 (get_elf_backend_data (abfd)->s->sizeof_sym)
861 /* The default alignment for sections, as a power of two. */
862 #define MIPS_ELF_LOG_FILE_ALIGN(abfd) \
863 (get_elf_backend_data (abfd)->s->log_file_align)
865 /* Get word-sized data. */
866 #define MIPS_ELF_GET_WORD(abfd, ptr) \
867 (ABI_64_P (abfd) ? bfd_get_64 (abfd, ptr) : bfd_get_32 (abfd, ptr))
869 /* Put out word-sized data. */
870 #define MIPS_ELF_PUT_WORD(abfd, val, ptr) \
872 ? bfd_put_64 (abfd, val, ptr) \
873 : bfd_put_32 (abfd, val, ptr))
875 /* The opcode for word-sized loads (LW or LD). */
876 #define MIPS_ELF_LOAD_WORD(abfd) \
877 (ABI_64_P (abfd) ? 0xdc000000 : 0x8c000000)
879 /* Add a dynamic symbol table-entry. */
880 #define MIPS_ELF_ADD_DYNAMIC_ENTRY(info, tag, val) \
881 _bfd_elf_add_dynamic_entry (info, tag, val)
883 #define MIPS_ELF_RTYPE_TO_HOWTO(abfd, rtype, rela) \
884 (get_elf_backend_data (abfd)->elf_backend_mips_rtype_to_howto (rtype, rela))
886 /* The name of the dynamic relocation section. */
887 #define MIPS_ELF_REL_DYN_NAME(INFO) \
888 (mips_elf_hash_table (INFO)->is_vxworks ? ".rela.dyn" : ".rel.dyn")
890 /* In case we're on a 32-bit machine, construct a 64-bit "-1" value
891 from smaller values. Start with zero, widen, *then* decrement. */
892 #define MINUS_ONE (((bfd_vma)0) - 1)
893 #define MINUS_TWO (((bfd_vma)0) - 2)
895 /* The value to write into got[1] for SVR4 targets, to identify it is
896 a GNU object. The dynamic linker can then use got[1] to store the
898 #define MIPS_ELF_GNU_GOT1_MASK(abfd) \
899 ((bfd_vma) 1 << (ABI_64_P (abfd) ? 63 : 31))
901 /* The offset of $gp from the beginning of the .got section. */
902 #define ELF_MIPS_GP_OFFSET(INFO) \
903 (mips_elf_hash_table (INFO)->is_vxworks ? 0x0 : 0x7ff0)
905 /* The maximum size of the GOT for it to be addressable using 16-bit
907 #define MIPS_ELF_GOT_MAX_SIZE(INFO) (ELF_MIPS_GP_OFFSET (INFO) + 0x7fff)
909 /* Instructions which appear in a stub. */
910 #define STUB_LW(abfd) \
912 ? 0xdf998010 /* ld t9,0x8010(gp) */ \
913 : 0x8f998010)) /* lw t9,0x8010(gp) */
914 #define STUB_MOVE 0x03e07825 /* or t7,ra,zero */
915 #define STUB_LUI(VAL) (0x3c180000 + (VAL)) /* lui t8,VAL */
916 #define STUB_JALR 0x0320f809 /* jalr t9,ra */
917 #define STUB_ORI(VAL) (0x37180000 + (VAL)) /* ori t8,t8,VAL */
918 #define STUB_LI16U(VAL) (0x34180000 + (VAL)) /* ori t8,zero,VAL unsigned */
919 #define STUB_LI16S(abfd, VAL) \
921 ? (0x64180000 + (VAL)) /* daddiu t8,zero,VAL sign extended */ \
922 : (0x24180000 + (VAL)))) /* addiu t8,zero,VAL sign extended */
924 /* Likewise for the microMIPS ASE. */
925 #define STUB_LW_MICROMIPS(abfd) \
927 ? 0xdf3c8010 /* ld t9,0x8010(gp) */ \
928 : 0xff3c8010) /* lw t9,0x8010(gp) */
929 #define STUB_MOVE_MICROMIPS 0x0dff /* move t7,ra */
930 #define STUB_MOVE32_MICROMIPS 0x001f7a90 /* or t7,ra,zero */
931 #define STUB_LUI_MICROMIPS(VAL) \
932 (0x41b80000 + (VAL)) /* lui t8,VAL */
933 #define STUB_JALR_MICROMIPS 0x45d9 /* jalr t9 */
934 #define STUB_JALR32_MICROMIPS 0x03f90f3c /* jalr ra,t9 */
935 #define STUB_ORI_MICROMIPS(VAL) \
936 (0x53180000 + (VAL)) /* ori t8,t8,VAL */
937 #define STUB_LI16U_MICROMIPS(VAL) \
938 (0x53000000 + (VAL)) /* ori t8,zero,VAL unsigned */
939 #define STUB_LI16S_MICROMIPS(abfd, VAL) \
941 ? 0x5f000000 + (VAL) /* daddiu t8,zero,VAL sign extended */ \
942 : 0x33000000 + (VAL)) /* addiu t8,zero,VAL sign extended */
944 #define MIPS_FUNCTION_STUB_NORMAL_SIZE 16
945 #define MIPS_FUNCTION_STUB_BIG_SIZE 20
946 #define MICROMIPS_FUNCTION_STUB_NORMAL_SIZE 12
947 #define MICROMIPS_FUNCTION_STUB_BIG_SIZE 16
948 #define MICROMIPS_INSN32_FUNCTION_STUB_NORMAL_SIZE 16
949 #define MICROMIPS_INSN32_FUNCTION_STUB_BIG_SIZE 20
951 /* The name of the dynamic interpreter. This is put in the .interp
954 #define ELF_DYNAMIC_INTERPRETER(abfd) \
955 (ABI_N32_P (abfd) ? "/usr/lib32/libc.so.1" \
956 : ABI_64_P (abfd) ? "/usr/lib64/libc.so.1" \
957 : "/usr/lib/libc.so.1")
960 #define MNAME(bfd,pre,pos) \
961 (ABI_64_P (bfd) ? CONCAT4 (pre,64,_,pos) : CONCAT4 (pre,32,_,pos))
962 #define ELF_R_SYM(bfd, i) \
963 (ABI_64_P (bfd) ? ELF64_R_SYM (i) : ELF32_R_SYM (i))
964 #define ELF_R_TYPE(bfd, i) \
965 (ABI_64_P (bfd) ? ELF64_MIPS_R_TYPE (i) : ELF32_R_TYPE (i))
966 #define ELF_R_INFO(bfd, s, t) \
967 (ABI_64_P (bfd) ? ELF64_R_INFO (s, t) : ELF32_R_INFO (s, t))
969 #define MNAME(bfd,pre,pos) CONCAT4 (pre,32,_,pos)
970 #define ELF_R_SYM(bfd, i) \
972 #define ELF_R_TYPE(bfd, i) \
974 #define ELF_R_INFO(bfd, s, t) \
975 (ELF32_R_INFO (s, t))
978 /* The mips16 compiler uses a couple of special sections to handle
979 floating point arguments.
981 Section names that look like .mips16.fn.FNNAME contain stubs that
982 copy floating point arguments from the fp regs to the gp regs and
983 then jump to FNNAME. If any 32 bit function calls FNNAME, the
984 call should be redirected to the stub instead. If no 32 bit
985 function calls FNNAME, the stub should be discarded. We need to
986 consider any reference to the function, not just a call, because
987 if the address of the function is taken we will need the stub,
988 since the address might be passed to a 32 bit function.
990 Section names that look like .mips16.call.FNNAME contain stubs
991 that copy floating point arguments from the gp regs to the fp
992 regs and then jump to FNNAME. If FNNAME is a 32 bit function,
993 then any 16 bit function that calls FNNAME should be redirected
994 to the stub instead. If FNNAME is not a 32 bit function, the
995 stub should be discarded.
997 .mips16.call.fp.FNNAME sections are similar, but contain stubs
998 which call FNNAME and then copy the return value from the fp regs
999 to the gp regs. These stubs store the return value in $18 while
1000 calling FNNAME; any function which might call one of these stubs
1001 must arrange to save $18 around the call. (This case is not
1002 needed for 32 bit functions that call 16 bit functions, because
1003 16 bit functions always return floating point values in both
1006 Note that in all cases FNNAME might be defined statically.
1007 Therefore, FNNAME is not used literally. Instead, the relocation
1008 information will indicate which symbol the section is for.
1010 We record any stubs that we find in the symbol table. */
1012 #define FN_STUB ".mips16.fn."
1013 #define CALL_STUB ".mips16.call."
1014 #define CALL_FP_STUB ".mips16.call.fp."
1016 #define FN_STUB_P(name) CONST_STRNEQ (name, FN_STUB)
1017 #define CALL_STUB_P(name) CONST_STRNEQ (name, CALL_STUB)
1018 #define CALL_FP_STUB_P(name) CONST_STRNEQ (name, CALL_FP_STUB)
1020 /* The format of the first PLT entry in an O32 executable. */
1021 static const bfd_vma mips_o32_exec_plt0_entry[] =
1023 0x3c1c0000, /* lui $28, %hi(&GOTPLT[0]) */
1024 0x8f990000, /* lw $25, %lo(&GOTPLT[0])($28) */
1025 0x279c0000, /* addiu $28, $28, %lo(&GOTPLT[0]) */
1026 0x031cc023, /* subu $24, $24, $28 */
1027 0x03e07825, /* or t7, ra, zero */
1028 0x0018c082, /* srl $24, $24, 2 */
1029 0x0320f809, /* jalr $25 */
1030 0x2718fffe /* subu $24, $24, 2 */
1033 /* The format of the first PLT entry in an N32 executable. Different
1034 because gp ($28) is not available; we use t2 ($14) instead. */
1035 static const bfd_vma mips_n32_exec_plt0_entry[] =
1037 0x3c0e0000, /* lui $14, %hi(&GOTPLT[0]) */
1038 0x8dd90000, /* lw $25, %lo(&GOTPLT[0])($14) */
1039 0x25ce0000, /* addiu $14, $14, %lo(&GOTPLT[0]) */
1040 0x030ec023, /* subu $24, $24, $14 */
1041 0x03e07825, /* or t7, ra, zero */
1042 0x0018c082, /* srl $24, $24, 2 */
1043 0x0320f809, /* jalr $25 */
1044 0x2718fffe /* subu $24, $24, 2 */
1047 /* The format of the first PLT entry in an N64 executable. Different
1048 from N32 because of the increased size of GOT entries. */
1049 static const bfd_vma mips_n64_exec_plt0_entry[] =
1051 0x3c0e0000, /* lui $14, %hi(&GOTPLT[0]) */
1052 0xddd90000, /* ld $25, %lo(&GOTPLT[0])($14) */
1053 0x25ce0000, /* addiu $14, $14, %lo(&GOTPLT[0]) */
1054 0x030ec023, /* subu $24, $24, $14 */
1055 0x03e07825, /* or t7, ra, zero */
1056 0x0018c0c2, /* srl $24, $24, 3 */
1057 0x0320f809, /* jalr $25 */
1058 0x2718fffe /* subu $24, $24, 2 */
1061 /* The format of the microMIPS first PLT entry in an O32 executable.
1062 We rely on v0 ($2) rather than t8 ($24) to contain the address
1063 of the GOTPLT entry handled, so this stub may only be used when
1064 all the subsequent PLT entries are microMIPS code too.
1066 The trailing NOP is for alignment and correct disassembly only. */
1067 static const bfd_vma micromips_o32_exec_plt0_entry[] =
1069 0x7980, 0x0000, /* addiupc $3, (&GOTPLT[0]) - . */
1070 0xff23, 0x0000, /* lw $25, 0($3) */
1071 0x0535, /* subu $2, $2, $3 */
1072 0x2525, /* srl $2, $2, 2 */
1073 0x3302, 0xfffe, /* subu $24, $2, 2 */
1074 0x0dff, /* move $15, $31 */
1075 0x45f9, /* jalrs $25 */
1076 0x0f83, /* move $28, $3 */
1080 /* The format of the microMIPS first PLT entry in an O32 executable
1081 in the insn32 mode. */
1082 static const bfd_vma micromips_insn32_o32_exec_plt0_entry[] =
1084 0x41bc, 0x0000, /* lui $28, %hi(&GOTPLT[0]) */
1085 0xff3c, 0x0000, /* lw $25, %lo(&GOTPLT[0])($28) */
1086 0x339c, 0x0000, /* addiu $28, $28, %lo(&GOTPLT[0]) */
1087 0x0398, 0xc1d0, /* subu $24, $24, $28 */
1088 0x001f, 0x7a90, /* or $15, $31, zero */
1089 0x0318, 0x1040, /* srl $24, $24, 2 */
1090 0x03f9, 0x0f3c, /* jalr $25 */
1091 0x3318, 0xfffe /* subu $24, $24, 2 */
1094 /* The format of subsequent standard PLT entries. */
1095 static const bfd_vma mips_exec_plt_entry[] =
1097 0x3c0f0000, /* lui $15, %hi(.got.plt entry) */
1098 0x01f90000, /* l[wd] $25, %lo(.got.plt entry)($15) */
1099 0x25f80000, /* addiu $24, $15, %lo(.got.plt entry) */
1100 0x03200008 /* jr $25 */
1103 /* In the following PLT entry the JR and ADDIU instructions will
1104 be swapped in _bfd_mips_elf_finish_dynamic_symbol because
1105 LOAD_INTERLOCKS_P will be true for MIPS R6. */
1106 static const bfd_vma mipsr6_exec_plt_entry[] =
1108 0x3c0f0000, /* lui $15, %hi(.got.plt entry) */
1109 0x01f90000, /* l[wd] $25, %lo(.got.plt entry)($15) */
1110 0x25f80000, /* addiu $24, $15, %lo(.got.plt entry) */
1111 0x03200009 /* jr $25 */
1114 /* The format of subsequent MIPS16 o32 PLT entries. We use v0 ($2)
1115 and v1 ($3) as temporaries because t8 ($24) and t9 ($25) are not
1116 directly addressable. */
1117 static const bfd_vma mips16_o32_exec_plt_entry[] =
1119 0xb203, /* lw $2, 12($pc) */
1120 0x9a60, /* lw $3, 0($2) */
1121 0x651a, /* move $24, $2 */
1123 0x653b, /* move $25, $3 */
1125 0x0000, 0x0000 /* .word (.got.plt entry) */
1128 /* The format of subsequent microMIPS o32 PLT entries. We use v0 ($2)
1129 as a temporary because t8 ($24) is not addressable with ADDIUPC. */
1130 static const bfd_vma micromips_o32_exec_plt_entry[] =
1132 0x7900, 0x0000, /* addiupc $2, (.got.plt entry) - . */
1133 0xff22, 0x0000, /* lw $25, 0($2) */
1134 0x4599, /* jr $25 */
1135 0x0f02 /* move $24, $2 */
1138 /* The format of subsequent microMIPS o32 PLT entries in the insn32 mode. */
1139 static const bfd_vma micromips_insn32_o32_exec_plt_entry[] =
1141 0x41af, 0x0000, /* lui $15, %hi(.got.plt entry) */
1142 0xff2f, 0x0000, /* lw $25, %lo(.got.plt entry)($15) */
1143 0x0019, 0x0f3c, /* jr $25 */
1144 0x330f, 0x0000 /* addiu $24, $15, %lo(.got.plt entry) */
1147 /* The format of the first PLT entry in a VxWorks executable. */
1148 static const bfd_vma mips_vxworks_exec_plt0_entry[] =
1150 0x3c190000, /* lui t9, %hi(_GLOBAL_OFFSET_TABLE_) */
1151 0x27390000, /* addiu t9, t9, %lo(_GLOBAL_OFFSET_TABLE_) */
1152 0x8f390008, /* lw t9, 8(t9) */
1153 0x00000000, /* nop */
1154 0x03200008, /* jr t9 */
1155 0x00000000 /* nop */
1158 /* The format of subsequent PLT entries. */
1159 static const bfd_vma mips_vxworks_exec_plt_entry[] =
1161 0x10000000, /* b .PLT_resolver */
1162 0x24180000, /* li t8, <pltindex> */
1163 0x3c190000, /* lui t9, %hi(<.got.plt slot>) */
1164 0x27390000, /* addiu t9, t9, %lo(<.got.plt slot>) */
1165 0x8f390000, /* lw t9, 0(t9) */
1166 0x00000000, /* nop */
1167 0x03200008, /* jr t9 */
1168 0x00000000 /* nop */
1171 /* The format of the first PLT entry in a VxWorks shared object. */
1172 static const bfd_vma mips_vxworks_shared_plt0_entry[] =
1174 0x8f990008, /* lw t9, 8(gp) */
1175 0x00000000, /* nop */
1176 0x03200008, /* jr t9 */
1177 0x00000000, /* nop */
1178 0x00000000, /* nop */
1179 0x00000000 /* nop */
1182 /* The format of subsequent PLT entries. */
1183 static const bfd_vma mips_vxworks_shared_plt_entry[] =
1185 0x10000000, /* b .PLT_resolver */
1186 0x24180000 /* li t8, <pltindex> */
1189 /* microMIPS 32-bit opcode helper installer. */
1192 bfd_put_micromips_32 (const bfd *abfd, bfd_vma opcode, bfd_byte *ptr)
1194 bfd_put_16 (abfd, (opcode >> 16) & 0xffff, ptr);
1195 bfd_put_16 (abfd, opcode & 0xffff, ptr + 2);
1198 /* microMIPS 32-bit opcode helper retriever. */
1201 bfd_get_micromips_32 (const bfd *abfd, const bfd_byte *ptr)
1203 return (bfd_get_16 (abfd, ptr) << 16) | bfd_get_16 (abfd, ptr + 2);
1206 /* Look up an entry in a MIPS ELF linker hash table. */
1208 #define mips_elf_link_hash_lookup(table, string, create, copy, follow) \
1209 ((struct mips_elf_link_hash_entry *) \
1210 elf_link_hash_lookup (&(table)->root, (string), (create), \
1213 /* Traverse a MIPS ELF linker hash table. */
1215 #define mips_elf_link_hash_traverse(table, func, info) \
1216 (elf_link_hash_traverse \
1218 (bfd_boolean (*) (struct elf_link_hash_entry *, void *)) (func), \
1221 /* Find the base offsets for thread-local storage in this object,
1222 for GD/LD and IE/LE respectively. */
1224 #define TP_OFFSET 0x7000
1225 #define DTP_OFFSET 0x8000
1228 dtprel_base (struct bfd_link_info *info)
1230 /* If tls_sec is NULL, we should have signalled an error already. */
1231 if (elf_hash_table (info)->tls_sec == NULL)
1233 return elf_hash_table (info)->tls_sec->vma + DTP_OFFSET;
1237 tprel_base (struct bfd_link_info *info)
1239 /* If tls_sec is NULL, we should have signalled an error already. */
1240 if (elf_hash_table (info)->tls_sec == NULL)
1242 return elf_hash_table (info)->tls_sec->vma + TP_OFFSET;
1245 /* Create an entry in a MIPS ELF linker hash table. */
1247 static struct bfd_hash_entry *
1248 mips_elf_link_hash_newfunc (struct bfd_hash_entry *entry,
1249 struct bfd_hash_table *table, const char *string)
1251 struct mips_elf_link_hash_entry *ret =
1252 (struct mips_elf_link_hash_entry *) entry;
1254 /* Allocate the structure if it has not already been allocated by a
1257 ret = bfd_hash_allocate (table, sizeof (struct mips_elf_link_hash_entry));
1259 return (struct bfd_hash_entry *) ret;
1261 /* Call the allocation method of the superclass. */
1262 ret = ((struct mips_elf_link_hash_entry *)
1263 _bfd_elf_link_hash_newfunc ((struct bfd_hash_entry *) ret,
1267 /* Set local fields. */
1268 memset (&ret->esym, 0, sizeof (EXTR));
1269 /* We use -2 as a marker to indicate that the information has
1270 not been set. -1 means there is no associated ifd. */
1273 ret->possibly_dynamic_relocs = 0;
1274 ret->fn_stub = NULL;
1275 ret->call_stub = NULL;
1276 ret->call_fp_stub = NULL;
1277 ret->global_got_area = GGA_NONE;
1278 ret->got_only_for_calls = TRUE;
1279 ret->readonly_reloc = FALSE;
1280 ret->has_static_relocs = FALSE;
1281 ret->no_fn_stub = FALSE;
1282 ret->need_fn_stub = FALSE;
1283 ret->has_nonpic_branches = FALSE;
1284 ret->needs_lazy_stub = FALSE;
1285 ret->use_plt_entry = FALSE;
1288 return (struct bfd_hash_entry *) ret;
1291 /* Allocate MIPS ELF private object data. */
1294 _bfd_mips_elf_mkobject (bfd *abfd)
1296 return bfd_elf_allocate_object (abfd, sizeof (struct mips_elf_obj_tdata),
1301 _bfd_mips_elf_new_section_hook (bfd *abfd, asection *sec)
1303 if (!sec->used_by_bfd)
1305 struct _mips_elf_section_data *sdata;
1306 bfd_size_type amt = sizeof (*sdata);
1308 sdata = bfd_zalloc (abfd, amt);
1311 sec->used_by_bfd = sdata;
1314 return _bfd_elf_new_section_hook (abfd, sec);
1317 /* Read ECOFF debugging information from a .mdebug section into a
1318 ecoff_debug_info structure. */
1321 _bfd_mips_elf_read_ecoff_info (bfd *abfd, asection *section,
1322 struct ecoff_debug_info *debug)
1325 const struct ecoff_debug_swap *swap;
1328 swap = get_elf_backend_data (abfd)->elf_backend_ecoff_debug_swap;
1329 memset (debug, 0, sizeof (*debug));
1331 ext_hdr = bfd_malloc (swap->external_hdr_size);
1332 if (ext_hdr == NULL && swap->external_hdr_size != 0)
1335 if (! bfd_get_section_contents (abfd, section, ext_hdr, 0,
1336 swap->external_hdr_size))
1339 symhdr = &debug->symbolic_header;
1340 (*swap->swap_hdr_in) (abfd, ext_hdr, symhdr);
1342 /* The symbolic header contains absolute file offsets and sizes to
1344 #define READ(ptr, offset, count, size, type) \
1345 if (symhdr->count == 0) \
1346 debug->ptr = NULL; \
1349 bfd_size_type amt = (bfd_size_type) size * symhdr->count; \
1350 debug->ptr = bfd_malloc (amt); \
1351 if (debug->ptr == NULL) \
1352 goto error_return; \
1353 if (bfd_seek (abfd, symhdr->offset, SEEK_SET) != 0 \
1354 || bfd_bread (debug->ptr, amt, abfd) != amt) \
1355 goto error_return; \
1358 READ (line, cbLineOffset, cbLine, sizeof (unsigned char), unsigned char *);
1359 READ (external_dnr, cbDnOffset, idnMax, swap->external_dnr_size, void *);
1360 READ (external_pdr, cbPdOffset, ipdMax, swap->external_pdr_size, void *);
1361 READ (external_sym, cbSymOffset, isymMax, swap->external_sym_size, void *);
1362 READ (external_opt, cbOptOffset, ioptMax, swap->external_opt_size, void *);
1363 READ (external_aux, cbAuxOffset, iauxMax, sizeof (union aux_ext),
1365 READ (ss, cbSsOffset, issMax, sizeof (char), char *);
1366 READ (ssext, cbSsExtOffset, issExtMax, sizeof (char), char *);
1367 READ (external_fdr, cbFdOffset, ifdMax, swap->external_fdr_size, void *);
1368 READ (external_rfd, cbRfdOffset, crfd, swap->external_rfd_size, void *);
1369 READ (external_ext, cbExtOffset, iextMax, swap->external_ext_size, void *);
1377 if (ext_hdr != NULL)
1379 if (debug->line != NULL)
1381 if (debug->external_dnr != NULL)
1382 free (debug->external_dnr);
1383 if (debug->external_pdr != NULL)
1384 free (debug->external_pdr);
1385 if (debug->external_sym != NULL)
1386 free (debug->external_sym);
1387 if (debug->external_opt != NULL)
1388 free (debug->external_opt);
1389 if (debug->external_aux != NULL)
1390 free (debug->external_aux);
1391 if (debug->ss != NULL)
1393 if (debug->ssext != NULL)
1394 free (debug->ssext);
1395 if (debug->external_fdr != NULL)
1396 free (debug->external_fdr);
1397 if (debug->external_rfd != NULL)
1398 free (debug->external_rfd);
1399 if (debug->external_ext != NULL)
1400 free (debug->external_ext);
1404 /* Swap RPDR (runtime procedure table entry) for output. */
1407 ecoff_swap_rpdr_out (bfd *abfd, const RPDR *in, struct rpdr_ext *ex)
1409 H_PUT_S32 (abfd, in->adr, ex->p_adr);
1410 H_PUT_32 (abfd, in->regmask, ex->p_regmask);
1411 H_PUT_32 (abfd, in->regoffset, ex->p_regoffset);
1412 H_PUT_32 (abfd, in->fregmask, ex->p_fregmask);
1413 H_PUT_32 (abfd, in->fregoffset, ex->p_fregoffset);
1414 H_PUT_32 (abfd, in->frameoffset, ex->p_frameoffset);
1416 H_PUT_16 (abfd, in->framereg, ex->p_framereg);
1417 H_PUT_16 (abfd, in->pcreg, ex->p_pcreg);
1419 H_PUT_32 (abfd, in->irpss, ex->p_irpss);
1422 /* Create a runtime procedure table from the .mdebug section. */
1425 mips_elf_create_procedure_table (void *handle, bfd *abfd,
1426 struct bfd_link_info *info, asection *s,
1427 struct ecoff_debug_info *debug)
1429 const struct ecoff_debug_swap *swap;
1430 HDRR *hdr = &debug->symbolic_header;
1432 struct rpdr_ext *erp;
1434 struct pdr_ext *epdr;
1435 struct sym_ext *esym;
1439 bfd_size_type count;
1440 unsigned long sindex;
1444 const char *no_name_func = _("static procedure (no name)");
1452 swap = get_elf_backend_data (abfd)->elf_backend_ecoff_debug_swap;
1454 sindex = strlen (no_name_func) + 1;
1455 count = hdr->ipdMax;
1458 size = swap->external_pdr_size;
1460 epdr = bfd_malloc (size * count);
1464 if (! _bfd_ecoff_get_accumulated_pdr (handle, (bfd_byte *) epdr))
1467 size = sizeof (RPDR);
1468 rp = rpdr = bfd_malloc (size * count);
1472 size = sizeof (char *);
1473 sv = bfd_malloc (size * count);
1477 count = hdr->isymMax;
1478 size = swap->external_sym_size;
1479 esym = bfd_malloc (size * count);
1483 if (! _bfd_ecoff_get_accumulated_sym (handle, (bfd_byte *) esym))
1486 count = hdr->issMax;
1487 ss = bfd_malloc (count);
1490 if (! _bfd_ecoff_get_accumulated_ss (handle, (bfd_byte *) ss))
1493 count = hdr->ipdMax;
1494 for (i = 0; i < (unsigned long) count; i++, rp++)
1496 (*swap->swap_pdr_in) (abfd, epdr + i, &pdr);
1497 (*swap->swap_sym_in) (abfd, &esym[pdr.isym], &sym);
1498 rp->adr = sym.value;
1499 rp->regmask = pdr.regmask;
1500 rp->regoffset = pdr.regoffset;
1501 rp->fregmask = pdr.fregmask;
1502 rp->fregoffset = pdr.fregoffset;
1503 rp->frameoffset = pdr.frameoffset;
1504 rp->framereg = pdr.framereg;
1505 rp->pcreg = pdr.pcreg;
1507 sv[i] = ss + sym.iss;
1508 sindex += strlen (sv[i]) + 1;
1512 size = sizeof (struct rpdr_ext) * (count + 2) + sindex;
1513 size = BFD_ALIGN (size, 16);
1514 rtproc = bfd_alloc (abfd, size);
1517 mips_elf_hash_table (info)->procedure_count = 0;
1521 mips_elf_hash_table (info)->procedure_count = count + 2;
1524 memset (erp, 0, sizeof (struct rpdr_ext));
1526 str = (char *) rtproc + sizeof (struct rpdr_ext) * (count + 2);
1527 strcpy (str, no_name_func);
1528 str += strlen (no_name_func) + 1;
1529 for (i = 0; i < count; i++)
1531 ecoff_swap_rpdr_out (abfd, rpdr + i, erp + i);
1532 strcpy (str, sv[i]);
1533 str += strlen (sv[i]) + 1;
1535 H_PUT_S32 (abfd, -1, (erp + count)->p_adr);
1537 /* Set the size and contents of .rtproc section. */
1539 s->contents = rtproc;
1541 /* Skip this section later on (I don't think this currently
1542 matters, but someday it might). */
1543 s->map_head.link_order = NULL;
1572 /* We're going to create a stub for H. Create a symbol for the stub's
1573 value and size, to help make the disassembly easier to read. */
1576 mips_elf_create_stub_symbol (struct bfd_link_info *info,
1577 struct mips_elf_link_hash_entry *h,
1578 const char *prefix, asection *s, bfd_vma value,
1581 struct bfd_link_hash_entry *bh;
1582 struct elf_link_hash_entry *elfh;
1586 if (ELF_ST_IS_MICROMIPS (h->root.other))
1589 /* Create a new symbol. */
1590 name = concat (prefix, h->root.root.root.string, NULL);
1592 res = _bfd_generic_link_add_one_symbol (info, s->owner, name,
1593 BSF_LOCAL, s, value, NULL,
1599 /* Make it a local function. */
1600 elfh = (struct elf_link_hash_entry *) bh;
1601 elfh->type = ELF_ST_INFO (STB_LOCAL, STT_FUNC);
1603 elfh->forced_local = 1;
1607 /* We're about to redefine H. Create a symbol to represent H's
1608 current value and size, to help make the disassembly easier
1612 mips_elf_create_shadow_symbol (struct bfd_link_info *info,
1613 struct mips_elf_link_hash_entry *h,
1616 struct bfd_link_hash_entry *bh;
1617 struct elf_link_hash_entry *elfh;
1623 /* Read the symbol's value. */
1624 BFD_ASSERT (h->root.root.type == bfd_link_hash_defined
1625 || h->root.root.type == bfd_link_hash_defweak);
1626 s = h->root.root.u.def.section;
1627 value = h->root.root.u.def.value;
1629 /* Create a new symbol. */
1630 name = concat (prefix, h->root.root.root.string, NULL);
1632 res = _bfd_generic_link_add_one_symbol (info, s->owner, name,
1633 BSF_LOCAL, s, value, NULL,
1639 /* Make it local and copy the other attributes from H. */
1640 elfh = (struct elf_link_hash_entry *) bh;
1641 elfh->type = ELF_ST_INFO (STB_LOCAL, ELF_ST_TYPE (h->root.type));
1642 elfh->other = h->root.other;
1643 elfh->size = h->root.size;
1644 elfh->forced_local = 1;
1648 /* Return TRUE if relocations in SECTION can refer directly to a MIPS16
1649 function rather than to a hard-float stub. */
1652 section_allows_mips16_refs_p (asection *section)
1656 name = bfd_get_section_name (section->owner, section);
1657 return (FN_STUB_P (name)
1658 || CALL_STUB_P (name)
1659 || CALL_FP_STUB_P (name)
1660 || strcmp (name, ".pdr") == 0);
1663 /* [RELOCS, RELEND) are the relocations against SEC, which is a MIPS16
1664 stub section of some kind. Return the R_SYMNDX of the target
1665 function, or 0 if we can't decide which function that is. */
1667 static unsigned long
1668 mips16_stub_symndx (const struct elf_backend_data *bed,
1669 asection *sec ATTRIBUTE_UNUSED,
1670 const Elf_Internal_Rela *relocs,
1671 const Elf_Internal_Rela *relend)
1673 int int_rels_per_ext_rel = bed->s->int_rels_per_ext_rel;
1674 const Elf_Internal_Rela *rel;
1676 /* Trust the first R_MIPS_NONE relocation, if any, but not a subsequent
1677 one in a compound relocation. */
1678 for (rel = relocs; rel < relend; rel += int_rels_per_ext_rel)
1679 if (ELF_R_TYPE (sec->owner, rel->r_info) == R_MIPS_NONE)
1680 return ELF_R_SYM (sec->owner, rel->r_info);
1682 /* Otherwise trust the first relocation, whatever its kind. This is
1683 the traditional behavior. */
1684 if (relocs < relend)
1685 return ELF_R_SYM (sec->owner, relocs->r_info);
1690 /* Check the mips16 stubs for a particular symbol, and see if we can
1694 mips_elf_check_mips16_stubs (struct bfd_link_info *info,
1695 struct mips_elf_link_hash_entry *h)
1697 /* Dynamic symbols must use the standard call interface, in case other
1698 objects try to call them. */
1699 if (h->fn_stub != NULL
1700 && h->root.dynindx != -1)
1702 mips_elf_create_shadow_symbol (info, h, ".mips16.");
1703 h->need_fn_stub = TRUE;
1706 if (h->fn_stub != NULL
1707 && ! h->need_fn_stub)
1709 /* We don't need the fn_stub; the only references to this symbol
1710 are 16 bit calls. Clobber the size to 0 to prevent it from
1711 being included in the link. */
1712 h->fn_stub->size = 0;
1713 h->fn_stub->flags &= ~SEC_RELOC;
1714 h->fn_stub->reloc_count = 0;
1715 h->fn_stub->flags |= SEC_EXCLUDE;
1716 h->fn_stub->output_section = bfd_abs_section_ptr;
1719 if (h->call_stub != NULL
1720 && ELF_ST_IS_MIPS16 (h->root.other))
1722 /* We don't need the call_stub; this is a 16 bit function, so
1723 calls from other 16 bit functions are OK. Clobber the size
1724 to 0 to prevent it from being included in the link. */
1725 h->call_stub->size = 0;
1726 h->call_stub->flags &= ~SEC_RELOC;
1727 h->call_stub->reloc_count = 0;
1728 h->call_stub->flags |= SEC_EXCLUDE;
1729 h->call_stub->output_section = bfd_abs_section_ptr;
1732 if (h->call_fp_stub != NULL
1733 && ELF_ST_IS_MIPS16 (h->root.other))
1735 /* We don't need the call_stub; this is a 16 bit function, so
1736 calls from other 16 bit functions are OK. Clobber the size
1737 to 0 to prevent it from being included in the link. */
1738 h->call_fp_stub->size = 0;
1739 h->call_fp_stub->flags &= ~SEC_RELOC;
1740 h->call_fp_stub->reloc_count = 0;
1741 h->call_fp_stub->flags |= SEC_EXCLUDE;
1742 h->call_fp_stub->output_section = bfd_abs_section_ptr;
1746 /* Hashtable callbacks for mips_elf_la25_stubs. */
1749 mips_elf_la25_stub_hash (const void *entry_)
1751 const struct mips_elf_la25_stub *entry;
1753 entry = (struct mips_elf_la25_stub *) entry_;
1754 return entry->h->root.root.u.def.section->id
1755 + entry->h->root.root.u.def.value;
1759 mips_elf_la25_stub_eq (const void *entry1_, const void *entry2_)
1761 const struct mips_elf_la25_stub *entry1, *entry2;
1763 entry1 = (struct mips_elf_la25_stub *) entry1_;
1764 entry2 = (struct mips_elf_la25_stub *) entry2_;
1765 return ((entry1->h->root.root.u.def.section
1766 == entry2->h->root.root.u.def.section)
1767 && (entry1->h->root.root.u.def.value
1768 == entry2->h->root.root.u.def.value));
1771 /* Called by the linker to set up the la25 stub-creation code. FN is
1772 the linker's implementation of add_stub_function. Return true on
1776 _bfd_mips_elf_init_stubs (struct bfd_link_info *info,
1777 asection *(*fn) (const char *, asection *,
1780 struct mips_elf_link_hash_table *htab;
1782 htab = mips_elf_hash_table (info);
1786 htab->add_stub_section = fn;
1787 htab->la25_stubs = htab_try_create (1, mips_elf_la25_stub_hash,
1788 mips_elf_la25_stub_eq, NULL);
1789 if (htab->la25_stubs == NULL)
1795 /* Return true if H is a locally-defined PIC function, in the sense
1796 that it or its fn_stub might need $25 to be valid on entry.
1797 Note that MIPS16 functions set up $gp using PC-relative instructions,
1798 so they themselves never need $25 to be valid. Only non-MIPS16
1799 entry points are of interest here. */
1802 mips_elf_local_pic_function_p (struct mips_elf_link_hash_entry *h)
1804 return ((h->root.root.type == bfd_link_hash_defined
1805 || h->root.root.type == bfd_link_hash_defweak)
1806 && h->root.def_regular
1807 && !bfd_is_abs_section (h->root.root.u.def.section)
1808 && (!ELF_ST_IS_MIPS16 (h->root.other)
1809 || (h->fn_stub && h->need_fn_stub))
1810 && (PIC_OBJECT_P (h->root.root.u.def.section->owner)
1811 || ELF_ST_IS_MIPS_PIC (h->root.other)));
1814 /* Set *SEC to the input section that contains the target of STUB.
1815 Return the offset of the target from the start of that section. */
1818 mips_elf_get_la25_target (struct mips_elf_la25_stub *stub,
1821 if (ELF_ST_IS_MIPS16 (stub->h->root.other))
1823 BFD_ASSERT (stub->h->need_fn_stub);
1824 *sec = stub->h->fn_stub;
1829 *sec = stub->h->root.root.u.def.section;
1830 return stub->h->root.root.u.def.value;
1834 /* STUB describes an la25 stub that we have decided to implement
1835 by inserting an LUI/ADDIU pair before the target function.
1836 Create the section and redirect the function symbol to it. */
1839 mips_elf_add_la25_intro (struct mips_elf_la25_stub *stub,
1840 struct bfd_link_info *info)
1842 struct mips_elf_link_hash_table *htab;
1844 asection *s, *input_section;
1847 htab = mips_elf_hash_table (info);
1851 /* Create a unique name for the new section. */
1852 name = bfd_malloc (11 + sizeof (".text.stub."));
1855 sprintf (name, ".text.stub.%d", (int) htab_elements (htab->la25_stubs));
1857 /* Create the section. */
1858 mips_elf_get_la25_target (stub, &input_section);
1859 s = htab->add_stub_section (name, input_section,
1860 input_section->output_section);
1864 /* Make sure that any padding goes before the stub. */
1865 align = input_section->alignment_power;
1866 if (!bfd_set_section_alignment (s->owner, s, align))
1869 s->size = (1 << align) - 8;
1871 /* Create a symbol for the stub. */
1872 mips_elf_create_stub_symbol (info, stub->h, ".pic.", s, s->size, 8);
1873 stub->stub_section = s;
1874 stub->offset = s->size;
1876 /* Allocate room for it. */
1881 /* STUB describes an la25 stub that we have decided to implement
1882 with a separate trampoline. Allocate room for it and redirect
1883 the function symbol to it. */
1886 mips_elf_add_la25_trampoline (struct mips_elf_la25_stub *stub,
1887 struct bfd_link_info *info)
1889 struct mips_elf_link_hash_table *htab;
1892 htab = mips_elf_hash_table (info);
1896 /* Create a trampoline section, if we haven't already. */
1897 s = htab->strampoline;
1900 asection *input_section = stub->h->root.root.u.def.section;
1901 s = htab->add_stub_section (".text", NULL,
1902 input_section->output_section);
1903 if (s == NULL || !bfd_set_section_alignment (s->owner, s, 4))
1905 htab->strampoline = s;
1908 /* Create a symbol for the stub. */
1909 mips_elf_create_stub_symbol (info, stub->h, ".pic.", s, s->size, 16);
1910 stub->stub_section = s;
1911 stub->offset = s->size;
1913 /* Allocate room for it. */
1918 /* H describes a symbol that needs an la25 stub. Make sure that an
1919 appropriate stub exists and point H at it. */
1922 mips_elf_add_la25_stub (struct bfd_link_info *info,
1923 struct mips_elf_link_hash_entry *h)
1925 struct mips_elf_link_hash_table *htab;
1926 struct mips_elf_la25_stub search, *stub;
1927 bfd_boolean use_trampoline_p;
1932 /* Describe the stub we want. */
1933 search.stub_section = NULL;
1937 /* See if we've already created an equivalent stub. */
1938 htab = mips_elf_hash_table (info);
1942 slot = htab_find_slot (htab->la25_stubs, &search, INSERT);
1946 stub = (struct mips_elf_la25_stub *) *slot;
1949 /* We can reuse the existing stub. */
1950 h->la25_stub = stub;
1954 /* Create a permanent copy of ENTRY and add it to the hash table. */
1955 stub = bfd_malloc (sizeof (search));
1961 /* Prefer to use LUI/ADDIU stubs if the function is at the beginning
1962 of the section and if we would need no more than 2 nops. */
1963 value = mips_elf_get_la25_target (stub, &s);
1964 use_trampoline_p = (value != 0 || s->alignment_power > 4);
1966 h->la25_stub = stub;
1967 return (use_trampoline_p
1968 ? mips_elf_add_la25_trampoline (stub, info)
1969 : mips_elf_add_la25_intro (stub, info));
1972 /* A mips_elf_link_hash_traverse callback that is called before sizing
1973 sections. DATA points to a mips_htab_traverse_info structure. */
1976 mips_elf_check_symbols (struct mips_elf_link_hash_entry *h, void *data)
1978 struct mips_htab_traverse_info *hti;
1980 hti = (struct mips_htab_traverse_info *) data;
1981 if (!bfd_link_relocatable (hti->info))
1982 mips_elf_check_mips16_stubs (hti->info, h);
1984 if (mips_elf_local_pic_function_p (h))
1986 /* PR 12845: If H is in a section that has been garbage
1987 collected it will have its output section set to *ABS*. */
1988 if (bfd_is_abs_section (h->root.root.u.def.section->output_section))
1991 /* H is a function that might need $25 to be valid on entry.
1992 If we're creating a non-PIC relocatable object, mark H as
1993 being PIC. If we're creating a non-relocatable object with
1994 non-PIC branches and jumps to H, make sure that H has an la25
1996 if (bfd_link_relocatable (hti->info))
1998 if (!PIC_OBJECT_P (hti->output_bfd))
1999 h->root.other = ELF_ST_SET_MIPS_PIC (h->root.other);
2001 else if (h->has_nonpic_branches && !mips_elf_add_la25_stub (hti->info, h))
2010 /* R_MIPS16_26 is used for the mips16 jal and jalx instructions.
2011 Most mips16 instructions are 16 bits, but these instructions
2014 The format of these instructions is:
2016 +--------------+--------------------------------+
2017 | JALX | X| Imm 20:16 | Imm 25:21 |
2018 +--------------+--------------------------------+
2020 +-----------------------------------------------+
2022 JALX is the 5-bit value 00011. X is 0 for jal, 1 for jalx.
2023 Note that the immediate value in the first word is swapped.
2025 When producing a relocatable object file, R_MIPS16_26 is
2026 handled mostly like R_MIPS_26. In particular, the addend is
2027 stored as a straight 26-bit value in a 32-bit instruction.
2028 (gas makes life simpler for itself by never adjusting a
2029 R_MIPS16_26 reloc to be against a section, so the addend is
2030 always zero). However, the 32 bit instruction is stored as 2
2031 16-bit values, rather than a single 32-bit value. In a
2032 big-endian file, the result is the same; in a little-endian
2033 file, the two 16-bit halves of the 32 bit value are swapped.
2034 This is so that a disassembler can recognize the jal
2037 When doing a final link, R_MIPS16_26 is treated as a 32 bit
2038 instruction stored as two 16-bit values. The addend A is the
2039 contents of the targ26 field. The calculation is the same as
2040 R_MIPS_26. When storing the calculated value, reorder the
2041 immediate value as shown above, and don't forget to store the
2042 value as two 16-bit values.
2044 To put it in MIPS ABI terms, the relocation field is T-targ26-16,
2048 +--------+----------------------+
2052 +--------+----------------------+
2055 +----------+------+-------------+
2059 +----------+--------------------+
2060 where targ26-16 is sub1 followed by sub2 (i.e., the addend field A is
2061 ((sub1 << 16) | sub2)).
2063 When producing a relocatable object file, the calculation is
2064 (((A < 2) | ((P + 4) & 0xf0000000) + S) >> 2)
2065 When producing a fully linked file, the calculation is
2066 let R = (((A < 2) | ((P + 4) & 0xf0000000) + S) >> 2)
2067 ((R & 0x1f0000) << 5) | ((R & 0x3e00000) >> 5) | (R & 0xffff)
2069 The table below lists the other MIPS16 instruction relocations.
2070 Each one is calculated in the same way as the non-MIPS16 relocation
2071 given on the right, but using the extended MIPS16 layout of 16-bit
2074 R_MIPS16_GPREL R_MIPS_GPREL16
2075 R_MIPS16_GOT16 R_MIPS_GOT16
2076 R_MIPS16_CALL16 R_MIPS_CALL16
2077 R_MIPS16_HI16 R_MIPS_HI16
2078 R_MIPS16_LO16 R_MIPS_LO16
2080 A typical instruction will have a format like this:
2082 +--------------+--------------------------------+
2083 | EXTEND | Imm 10:5 | Imm 15:11 |
2084 +--------------+--------------------------------+
2085 | Major | rx | ry | Imm 4:0 |
2086 +--------------+--------------------------------+
2088 EXTEND is the five bit value 11110. Major is the instruction
2091 All we need to do here is shuffle the bits appropriately.
2092 As above, the two 16-bit halves must be swapped on a
2093 little-endian system. */
2095 static inline bfd_boolean
2096 mips16_reloc_p (int r_type)
2101 case R_MIPS16_GPREL:
2102 case R_MIPS16_GOT16:
2103 case R_MIPS16_CALL16:
2106 case R_MIPS16_TLS_GD:
2107 case R_MIPS16_TLS_LDM:
2108 case R_MIPS16_TLS_DTPREL_HI16:
2109 case R_MIPS16_TLS_DTPREL_LO16:
2110 case R_MIPS16_TLS_GOTTPREL:
2111 case R_MIPS16_TLS_TPREL_HI16:
2112 case R_MIPS16_TLS_TPREL_LO16:
2120 /* Check if a microMIPS reloc. */
2122 static inline bfd_boolean
2123 micromips_reloc_p (unsigned int r_type)
2125 return r_type >= R_MICROMIPS_min && r_type < R_MICROMIPS_max;
2128 /* Similar to MIPS16, the two 16-bit halves in microMIPS must be swapped
2129 on a little-endian system. This does not apply to R_MICROMIPS_PC7_S1
2130 and R_MICROMIPS_PC10_S1 relocs that apply to 16-bit instructions. */
2132 static inline bfd_boolean
2133 micromips_reloc_shuffle_p (unsigned int r_type)
2135 return (micromips_reloc_p (r_type)
2136 && r_type != R_MICROMIPS_PC7_S1
2137 && r_type != R_MICROMIPS_PC10_S1);
2140 static inline bfd_boolean
2141 got16_reloc_p (int r_type)
2143 return (r_type == R_MIPS_GOT16
2144 || r_type == R_MIPS16_GOT16
2145 || r_type == R_MICROMIPS_GOT16);
2148 static inline bfd_boolean
2149 call16_reloc_p (int r_type)
2151 return (r_type == R_MIPS_CALL16
2152 || r_type == R_MIPS16_CALL16
2153 || r_type == R_MICROMIPS_CALL16);
2156 static inline bfd_boolean
2157 got_disp_reloc_p (unsigned int r_type)
2159 return r_type == R_MIPS_GOT_DISP || r_type == R_MICROMIPS_GOT_DISP;
2162 static inline bfd_boolean
2163 got_page_reloc_p (unsigned int r_type)
2165 return r_type == R_MIPS_GOT_PAGE || r_type == R_MICROMIPS_GOT_PAGE;
2168 static inline bfd_boolean
2169 got_lo16_reloc_p (unsigned int r_type)
2171 return r_type == R_MIPS_GOT_LO16 || r_type == R_MICROMIPS_GOT_LO16;
2174 static inline bfd_boolean
2175 call_hi16_reloc_p (unsigned int r_type)
2177 return r_type == R_MIPS_CALL_HI16 || r_type == R_MICROMIPS_CALL_HI16;
2180 static inline bfd_boolean
2181 call_lo16_reloc_p (unsigned int r_type)
2183 return r_type == R_MIPS_CALL_LO16 || r_type == R_MICROMIPS_CALL_LO16;
2186 static inline bfd_boolean
2187 hi16_reloc_p (int r_type)
2189 return (r_type == R_MIPS_HI16
2190 || r_type == R_MIPS16_HI16
2191 || r_type == R_MICROMIPS_HI16
2192 || r_type == R_MIPS_PCHI16);
2195 static inline bfd_boolean
2196 lo16_reloc_p (int r_type)
2198 return (r_type == R_MIPS_LO16
2199 || r_type == R_MIPS16_LO16
2200 || r_type == R_MICROMIPS_LO16
2201 || r_type == R_MIPS_PCLO16);
2204 static inline bfd_boolean
2205 mips16_call_reloc_p (int r_type)
2207 return r_type == R_MIPS16_26 || r_type == R_MIPS16_CALL16;
2210 static inline bfd_boolean
2211 jal_reloc_p (int r_type)
2213 return (r_type == R_MIPS_26
2214 || r_type == R_MIPS16_26
2215 || r_type == R_MICROMIPS_26_S1);
2218 static inline bfd_boolean
2219 aligned_pcrel_reloc_p (int r_type)
2221 return (r_type == R_MIPS_PC18_S3
2222 || r_type == R_MIPS_PC19_S2);
2225 static inline bfd_boolean
2226 micromips_branch_reloc_p (int r_type)
2228 return (r_type == R_MICROMIPS_26_S1
2229 || r_type == R_MICROMIPS_PC16_S1
2230 || r_type == R_MICROMIPS_PC10_S1
2231 || r_type == R_MICROMIPS_PC7_S1);
2234 static inline bfd_boolean
2235 tls_gd_reloc_p (unsigned int r_type)
2237 return (r_type == R_MIPS_TLS_GD
2238 || r_type == R_MIPS16_TLS_GD
2239 || r_type == R_MICROMIPS_TLS_GD);
2242 static inline bfd_boolean
2243 tls_ldm_reloc_p (unsigned int r_type)
2245 return (r_type == R_MIPS_TLS_LDM
2246 || r_type == R_MIPS16_TLS_LDM
2247 || r_type == R_MICROMIPS_TLS_LDM);
2250 static inline bfd_boolean
2251 tls_gottprel_reloc_p (unsigned int r_type)
2253 return (r_type == R_MIPS_TLS_GOTTPREL
2254 || r_type == R_MIPS16_TLS_GOTTPREL
2255 || r_type == R_MICROMIPS_TLS_GOTTPREL);
2259 _bfd_mips_elf_reloc_unshuffle (bfd *abfd, int r_type,
2260 bfd_boolean jal_shuffle, bfd_byte *data)
2262 bfd_vma first, second, val;
2264 if (!mips16_reloc_p (r_type) && !micromips_reloc_shuffle_p (r_type))
2267 /* Pick up the first and second halfwords of the instruction. */
2268 first = bfd_get_16 (abfd, data);
2269 second = bfd_get_16 (abfd, data + 2);
2270 if (micromips_reloc_p (r_type) || (r_type == R_MIPS16_26 && !jal_shuffle))
2271 val = first << 16 | second;
2272 else if (r_type != R_MIPS16_26)
2273 val = (((first & 0xf800) << 16) | ((second & 0xffe0) << 11)
2274 | ((first & 0x1f) << 11) | (first & 0x7e0) | (second & 0x1f));
2276 val = (((first & 0xfc00) << 16) | ((first & 0x3e0) << 11)
2277 | ((first & 0x1f) << 21) | second);
2278 bfd_put_32 (abfd, val, data);
2282 _bfd_mips_elf_reloc_shuffle (bfd *abfd, int r_type,
2283 bfd_boolean jal_shuffle, bfd_byte *data)
2285 bfd_vma first, second, val;
2287 if (!mips16_reloc_p (r_type) && !micromips_reloc_shuffle_p (r_type))
2290 val = bfd_get_32 (abfd, data);
2291 if (micromips_reloc_p (r_type) || (r_type == R_MIPS16_26 && !jal_shuffle))
2293 second = val & 0xffff;
2296 else if (r_type != R_MIPS16_26)
2298 second = ((val >> 11) & 0xffe0) | (val & 0x1f);
2299 first = ((val >> 16) & 0xf800) | ((val >> 11) & 0x1f) | (val & 0x7e0);
2303 second = val & 0xffff;
2304 first = ((val >> 16) & 0xfc00) | ((val >> 11) & 0x3e0)
2305 | ((val >> 21) & 0x1f);
2307 bfd_put_16 (abfd, second, data + 2);
2308 bfd_put_16 (abfd, first, data);
2311 bfd_reloc_status_type
2312 _bfd_mips_elf_gprel16_with_gp (bfd *abfd, asymbol *symbol,
2313 arelent *reloc_entry, asection *input_section,
2314 bfd_boolean relocatable, void *data, bfd_vma gp)
2318 bfd_reloc_status_type status;
2320 if (bfd_is_com_section (symbol->section))
2323 relocation = symbol->value;
2325 relocation += symbol->section->output_section->vma;
2326 relocation += symbol->section->output_offset;
2328 if (reloc_entry->address > bfd_get_section_limit (abfd, input_section))
2329 return bfd_reloc_outofrange;
2331 /* Set val to the offset into the section or symbol. */
2332 val = reloc_entry->addend;
2334 _bfd_mips_elf_sign_extend (val, 16);
2336 /* Adjust val for the final section location and GP value. If we
2337 are producing relocatable output, we don't want to do this for
2338 an external symbol. */
2340 || (symbol->flags & BSF_SECTION_SYM) != 0)
2341 val += relocation - gp;
2343 if (reloc_entry->howto->partial_inplace)
2345 status = _bfd_relocate_contents (reloc_entry->howto, abfd, val,
2347 + reloc_entry->address);
2348 if (status != bfd_reloc_ok)
2352 reloc_entry->addend = val;
2355 reloc_entry->address += input_section->output_offset;
2357 return bfd_reloc_ok;
2360 /* Used to store a REL high-part relocation such as R_MIPS_HI16 or
2361 R_MIPS_GOT16. REL is the relocation, INPUT_SECTION is the section
2362 that contains the relocation field and DATA points to the start of
2367 struct mips_hi16 *next;
2369 asection *input_section;
2373 /* FIXME: This should not be a static variable. */
2375 static struct mips_hi16 *mips_hi16_list;
2377 /* A howto special_function for REL *HI16 relocations. We can only
2378 calculate the correct value once we've seen the partnering
2379 *LO16 relocation, so just save the information for later.
2381 The ABI requires that the *LO16 immediately follow the *HI16.
2382 However, as a GNU extension, we permit an arbitrary number of
2383 *HI16s to be associated with a single *LO16. This significantly
2384 simplies the relocation handling in gcc. */
2386 bfd_reloc_status_type
2387 _bfd_mips_elf_hi16_reloc (bfd *abfd ATTRIBUTE_UNUSED, arelent *reloc_entry,
2388 asymbol *symbol ATTRIBUTE_UNUSED, void *data,
2389 asection *input_section, bfd *output_bfd,
2390 char **error_message ATTRIBUTE_UNUSED)
2392 struct mips_hi16 *n;
2394 if (reloc_entry->address > bfd_get_section_limit (abfd, input_section))
2395 return bfd_reloc_outofrange;
2397 n = bfd_malloc (sizeof *n);
2399 return bfd_reloc_outofrange;
2401 n->next = mips_hi16_list;
2403 n->input_section = input_section;
2404 n->rel = *reloc_entry;
2407 if (output_bfd != NULL)
2408 reloc_entry->address += input_section->output_offset;
2410 return bfd_reloc_ok;
2413 /* A howto special_function for REL R_MIPS*_GOT16 relocations. This is just
2414 like any other 16-bit relocation when applied to global symbols, but is
2415 treated in the same as R_MIPS_HI16 when applied to local symbols. */
2417 bfd_reloc_status_type
2418 _bfd_mips_elf_got16_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol,
2419 void *data, asection *input_section,
2420 bfd *output_bfd, char **error_message)
2422 if ((symbol->flags & (BSF_GLOBAL | BSF_WEAK)) != 0
2423 || bfd_is_und_section (bfd_get_section (symbol))
2424 || bfd_is_com_section (bfd_get_section (symbol)))
2425 /* The relocation is against a global symbol. */
2426 return _bfd_mips_elf_generic_reloc (abfd, reloc_entry, symbol, data,
2427 input_section, output_bfd,
2430 return _bfd_mips_elf_hi16_reloc (abfd, reloc_entry, symbol, data,
2431 input_section, output_bfd, error_message);
2434 /* A howto special_function for REL *LO16 relocations. The *LO16 itself
2435 is a straightforward 16 bit inplace relocation, but we must deal with
2436 any partnering high-part relocations as well. */
2438 bfd_reloc_status_type
2439 _bfd_mips_elf_lo16_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol,
2440 void *data, asection *input_section,
2441 bfd *output_bfd, char **error_message)
2444 bfd_byte *location = (bfd_byte *) data + reloc_entry->address;
2446 if (reloc_entry->address > bfd_get_section_limit (abfd, input_section))
2447 return bfd_reloc_outofrange;
2449 _bfd_mips_elf_reloc_unshuffle (abfd, reloc_entry->howto->type, FALSE,
2451 vallo = bfd_get_32 (abfd, location);
2452 _bfd_mips_elf_reloc_shuffle (abfd, reloc_entry->howto->type, FALSE,
2455 while (mips_hi16_list != NULL)
2457 bfd_reloc_status_type ret;
2458 struct mips_hi16 *hi;
2460 hi = mips_hi16_list;
2462 /* R_MIPS*_GOT16 relocations are something of a special case. We
2463 want to install the addend in the same way as for a R_MIPS*_HI16
2464 relocation (with a rightshift of 16). However, since GOT16
2465 relocations can also be used with global symbols, their howto
2466 has a rightshift of 0. */
2467 if (hi->rel.howto->type == R_MIPS_GOT16)
2468 hi->rel.howto = MIPS_ELF_RTYPE_TO_HOWTO (abfd, R_MIPS_HI16, FALSE);
2469 else if (hi->rel.howto->type == R_MIPS16_GOT16)
2470 hi->rel.howto = MIPS_ELF_RTYPE_TO_HOWTO (abfd, R_MIPS16_HI16, FALSE);
2471 else if (hi->rel.howto->type == R_MICROMIPS_GOT16)
2472 hi->rel.howto = MIPS_ELF_RTYPE_TO_HOWTO (abfd, R_MICROMIPS_HI16, FALSE);
2474 /* VALLO is a signed 16-bit number. Bias it by 0x8000 so that any
2475 carry or borrow will induce a change of +1 or -1 in the high part. */
2476 hi->rel.addend += (vallo + 0x8000) & 0xffff;
2478 ret = _bfd_mips_elf_generic_reloc (abfd, &hi->rel, symbol, hi->data,
2479 hi->input_section, output_bfd,
2481 if (ret != bfd_reloc_ok)
2484 mips_hi16_list = hi->next;
2488 return _bfd_mips_elf_generic_reloc (abfd, reloc_entry, symbol, data,
2489 input_section, output_bfd,
2493 /* A generic howto special_function. This calculates and installs the
2494 relocation itself, thus avoiding the oft-discussed problems in
2495 bfd_perform_relocation and bfd_install_relocation. */
2497 bfd_reloc_status_type
2498 _bfd_mips_elf_generic_reloc (bfd *abfd ATTRIBUTE_UNUSED, arelent *reloc_entry,
2499 asymbol *symbol, void *data ATTRIBUTE_UNUSED,
2500 asection *input_section, bfd *output_bfd,
2501 char **error_message ATTRIBUTE_UNUSED)
2504 bfd_reloc_status_type status;
2505 bfd_boolean relocatable;
2507 relocatable = (output_bfd != NULL);
2509 if (reloc_entry->address > bfd_get_section_limit (abfd, input_section))
2510 return bfd_reloc_outofrange;
2512 /* Build up the field adjustment in VAL. */
2514 if (!relocatable || (symbol->flags & BSF_SECTION_SYM) != 0)
2516 /* Either we're calculating the final field value or we have a
2517 relocation against a section symbol. Add in the section's
2518 offset or address. */
2519 val += symbol->section->output_section->vma;
2520 val += symbol->section->output_offset;
2525 /* We're calculating the final field value. Add in the symbol's value
2526 and, if pc-relative, subtract the address of the field itself. */
2527 val += symbol->value;
2528 if (reloc_entry->howto->pc_relative)
2530 val -= input_section->output_section->vma;
2531 val -= input_section->output_offset;
2532 val -= reloc_entry->address;
2536 /* VAL is now the final adjustment. If we're keeping this relocation
2537 in the output file, and if the relocation uses a separate addend,
2538 we just need to add VAL to that addend. Otherwise we need to add
2539 VAL to the relocation field itself. */
2540 if (relocatable && !reloc_entry->howto->partial_inplace)
2541 reloc_entry->addend += val;
2544 bfd_byte *location = (bfd_byte *) data + reloc_entry->address;
2546 /* Add in the separate addend, if any. */
2547 val += reloc_entry->addend;
2549 /* Add VAL to the relocation field. */
2550 _bfd_mips_elf_reloc_unshuffle (abfd, reloc_entry->howto->type, FALSE,
2552 status = _bfd_relocate_contents (reloc_entry->howto, abfd, val,
2554 _bfd_mips_elf_reloc_shuffle (abfd, reloc_entry->howto->type, FALSE,
2557 if (status != bfd_reloc_ok)
2562 reloc_entry->address += input_section->output_offset;
2564 return bfd_reloc_ok;
2567 /* Swap an entry in a .gptab section. Note that these routines rely
2568 on the equivalence of the two elements of the union. */
2571 bfd_mips_elf32_swap_gptab_in (bfd *abfd, const Elf32_External_gptab *ex,
2574 in->gt_entry.gt_g_value = H_GET_32 (abfd, ex->gt_entry.gt_g_value);
2575 in->gt_entry.gt_bytes = H_GET_32 (abfd, ex->gt_entry.gt_bytes);
2579 bfd_mips_elf32_swap_gptab_out (bfd *abfd, const Elf32_gptab *in,
2580 Elf32_External_gptab *ex)
2582 H_PUT_32 (abfd, in->gt_entry.gt_g_value, ex->gt_entry.gt_g_value);
2583 H_PUT_32 (abfd, in->gt_entry.gt_bytes, ex->gt_entry.gt_bytes);
2587 bfd_elf32_swap_compact_rel_out (bfd *abfd, const Elf32_compact_rel *in,
2588 Elf32_External_compact_rel *ex)
2590 H_PUT_32 (abfd, in->id1, ex->id1);
2591 H_PUT_32 (abfd, in->num, ex->num);
2592 H_PUT_32 (abfd, in->id2, ex->id2);
2593 H_PUT_32 (abfd, in->offset, ex->offset);
2594 H_PUT_32 (abfd, in->reserved0, ex->reserved0);
2595 H_PUT_32 (abfd, in->reserved1, ex->reserved1);
2599 bfd_elf32_swap_crinfo_out (bfd *abfd, const Elf32_crinfo *in,
2600 Elf32_External_crinfo *ex)
2604 l = (((in->ctype & CRINFO_CTYPE) << CRINFO_CTYPE_SH)
2605 | ((in->rtype & CRINFO_RTYPE) << CRINFO_RTYPE_SH)
2606 | ((in->dist2to & CRINFO_DIST2TO) << CRINFO_DIST2TO_SH)
2607 | ((in->relvaddr & CRINFO_RELVADDR) << CRINFO_RELVADDR_SH));
2608 H_PUT_32 (abfd, l, ex->info);
2609 H_PUT_32 (abfd, in->konst, ex->konst);
2610 H_PUT_32 (abfd, in->vaddr, ex->vaddr);
2613 /* A .reginfo section holds a single Elf32_RegInfo structure. These
2614 routines swap this structure in and out. They are used outside of
2615 BFD, so they are globally visible. */
2618 bfd_mips_elf32_swap_reginfo_in (bfd *abfd, const Elf32_External_RegInfo *ex,
2621 in->ri_gprmask = H_GET_32 (abfd, ex->ri_gprmask);
2622 in->ri_cprmask[0] = H_GET_32 (abfd, ex->ri_cprmask[0]);
2623 in->ri_cprmask[1] = H_GET_32 (abfd, ex->ri_cprmask[1]);
2624 in->ri_cprmask[2] = H_GET_32 (abfd, ex->ri_cprmask[2]);
2625 in->ri_cprmask[3] = H_GET_32 (abfd, ex->ri_cprmask[3]);
2626 in->ri_gp_value = H_GET_32 (abfd, ex->ri_gp_value);
2630 bfd_mips_elf32_swap_reginfo_out (bfd *abfd, const Elf32_RegInfo *in,
2631 Elf32_External_RegInfo *ex)
2633 H_PUT_32 (abfd, in->ri_gprmask, ex->ri_gprmask);
2634 H_PUT_32 (abfd, in->ri_cprmask[0], ex->ri_cprmask[0]);
2635 H_PUT_32 (abfd, in->ri_cprmask[1], ex->ri_cprmask[1]);
2636 H_PUT_32 (abfd, in->ri_cprmask[2], ex->ri_cprmask[2]);
2637 H_PUT_32 (abfd, in->ri_cprmask[3], ex->ri_cprmask[3]);
2638 H_PUT_32 (abfd, in->ri_gp_value, ex->ri_gp_value);
2641 /* In the 64 bit ABI, the .MIPS.options section holds register
2642 information in an Elf64_Reginfo structure. These routines swap
2643 them in and out. They are globally visible because they are used
2644 outside of BFD. These routines are here so that gas can call them
2645 without worrying about whether the 64 bit ABI has been included. */
2648 bfd_mips_elf64_swap_reginfo_in (bfd *abfd, const Elf64_External_RegInfo *ex,
2649 Elf64_Internal_RegInfo *in)
2651 in->ri_gprmask = H_GET_32 (abfd, ex->ri_gprmask);
2652 in->ri_pad = H_GET_32 (abfd, ex->ri_pad);
2653 in->ri_cprmask[0] = H_GET_32 (abfd, ex->ri_cprmask[0]);
2654 in->ri_cprmask[1] = H_GET_32 (abfd, ex->ri_cprmask[1]);
2655 in->ri_cprmask[2] = H_GET_32 (abfd, ex->ri_cprmask[2]);
2656 in->ri_cprmask[3] = H_GET_32 (abfd, ex->ri_cprmask[3]);
2657 in->ri_gp_value = H_GET_64 (abfd, ex->ri_gp_value);
2661 bfd_mips_elf64_swap_reginfo_out (bfd *abfd, const Elf64_Internal_RegInfo *in,
2662 Elf64_External_RegInfo *ex)
2664 H_PUT_32 (abfd, in->ri_gprmask, ex->ri_gprmask);
2665 H_PUT_32 (abfd, in->ri_pad, ex->ri_pad);
2666 H_PUT_32 (abfd, in->ri_cprmask[0], ex->ri_cprmask[0]);
2667 H_PUT_32 (abfd, in->ri_cprmask[1], ex->ri_cprmask[1]);
2668 H_PUT_32 (abfd, in->ri_cprmask[2], ex->ri_cprmask[2]);
2669 H_PUT_32 (abfd, in->ri_cprmask[3], ex->ri_cprmask[3]);
2670 H_PUT_64 (abfd, in->ri_gp_value, ex->ri_gp_value);
2673 /* Swap in an options header. */
2676 bfd_mips_elf_swap_options_in (bfd *abfd, const Elf_External_Options *ex,
2677 Elf_Internal_Options *in)
2679 in->kind = H_GET_8 (abfd, ex->kind);
2680 in->size = H_GET_8 (abfd, ex->size);
2681 in->section = H_GET_16 (abfd, ex->section);
2682 in->info = H_GET_32 (abfd, ex->info);
2685 /* Swap out an options header. */
2688 bfd_mips_elf_swap_options_out (bfd *abfd, const Elf_Internal_Options *in,
2689 Elf_External_Options *ex)
2691 H_PUT_8 (abfd, in->kind, ex->kind);
2692 H_PUT_8 (abfd, in->size, ex->size);
2693 H_PUT_16 (abfd, in->section, ex->section);
2694 H_PUT_32 (abfd, in->info, ex->info);
2697 /* Swap in an abiflags structure. */
2700 bfd_mips_elf_swap_abiflags_v0_in (bfd *abfd,
2701 const Elf_External_ABIFlags_v0 *ex,
2702 Elf_Internal_ABIFlags_v0 *in)
2704 in->version = H_GET_16 (abfd, ex->version);
2705 in->isa_level = H_GET_8 (abfd, ex->isa_level);
2706 in->isa_rev = H_GET_8 (abfd, ex->isa_rev);
2707 in->gpr_size = H_GET_8 (abfd, ex->gpr_size);
2708 in->cpr1_size = H_GET_8 (abfd, ex->cpr1_size);
2709 in->cpr2_size = H_GET_8 (abfd, ex->cpr2_size);
2710 in->fp_abi = H_GET_8 (abfd, ex->fp_abi);
2711 in->isa_ext = H_GET_32 (abfd, ex->isa_ext);
2712 in->ases = H_GET_32 (abfd, ex->ases);
2713 in->flags1 = H_GET_32 (abfd, ex->flags1);
2714 in->flags2 = H_GET_32 (abfd, ex->flags2);
2717 /* Swap out an abiflags structure. */
2720 bfd_mips_elf_swap_abiflags_v0_out (bfd *abfd,
2721 const Elf_Internal_ABIFlags_v0 *in,
2722 Elf_External_ABIFlags_v0 *ex)
2724 H_PUT_16 (abfd, in->version, ex->version);
2725 H_PUT_8 (abfd, in->isa_level, ex->isa_level);
2726 H_PUT_8 (abfd, in->isa_rev, ex->isa_rev);
2727 H_PUT_8 (abfd, in->gpr_size, ex->gpr_size);
2728 H_PUT_8 (abfd, in->cpr1_size, ex->cpr1_size);
2729 H_PUT_8 (abfd, in->cpr2_size, ex->cpr2_size);
2730 H_PUT_8 (abfd, in->fp_abi, ex->fp_abi);
2731 H_PUT_32 (abfd, in->isa_ext, ex->isa_ext);
2732 H_PUT_32 (abfd, in->ases, ex->ases);
2733 H_PUT_32 (abfd, in->flags1, ex->flags1);
2734 H_PUT_32 (abfd, in->flags2, ex->flags2);
2737 /* This function is called via qsort() to sort the dynamic relocation
2738 entries by increasing r_symndx value. */
2741 sort_dynamic_relocs (const void *arg1, const void *arg2)
2743 Elf_Internal_Rela int_reloc1;
2744 Elf_Internal_Rela int_reloc2;
2747 bfd_elf32_swap_reloc_in (reldyn_sorting_bfd, arg1, &int_reloc1);
2748 bfd_elf32_swap_reloc_in (reldyn_sorting_bfd, arg2, &int_reloc2);
2750 diff = ELF32_R_SYM (int_reloc1.r_info) - ELF32_R_SYM (int_reloc2.r_info);
2754 if (int_reloc1.r_offset < int_reloc2.r_offset)
2756 if (int_reloc1.r_offset > int_reloc2.r_offset)
2761 /* Like sort_dynamic_relocs, but used for elf64 relocations. */
2764 sort_dynamic_relocs_64 (const void *arg1 ATTRIBUTE_UNUSED,
2765 const void *arg2 ATTRIBUTE_UNUSED)
2768 Elf_Internal_Rela int_reloc1[3];
2769 Elf_Internal_Rela int_reloc2[3];
2771 (*get_elf_backend_data (reldyn_sorting_bfd)->s->swap_reloc_in)
2772 (reldyn_sorting_bfd, arg1, int_reloc1);
2773 (*get_elf_backend_data (reldyn_sorting_bfd)->s->swap_reloc_in)
2774 (reldyn_sorting_bfd, arg2, int_reloc2);
2776 if (ELF64_R_SYM (int_reloc1[0].r_info) < ELF64_R_SYM (int_reloc2[0].r_info))
2778 if (ELF64_R_SYM (int_reloc1[0].r_info) > ELF64_R_SYM (int_reloc2[0].r_info))
2781 if (int_reloc1[0].r_offset < int_reloc2[0].r_offset)
2783 if (int_reloc1[0].r_offset > int_reloc2[0].r_offset)
2792 /* This routine is used to write out ECOFF debugging external symbol
2793 information. It is called via mips_elf_link_hash_traverse. The
2794 ECOFF external symbol information must match the ELF external
2795 symbol information. Unfortunately, at this point we don't know
2796 whether a symbol is required by reloc information, so the two
2797 tables may wind up being different. We must sort out the external
2798 symbol information before we can set the final size of the .mdebug
2799 section, and we must set the size of the .mdebug section before we
2800 can relocate any sections, and we can't know which symbols are
2801 required by relocation until we relocate the sections.
2802 Fortunately, it is relatively unlikely that any symbol will be
2803 stripped but required by a reloc. In particular, it can not happen
2804 when generating a final executable. */
2807 mips_elf_output_extsym (struct mips_elf_link_hash_entry *h, void *data)
2809 struct extsym_info *einfo = data;
2811 asection *sec, *output_section;
2813 if (h->root.indx == -2)
2815 else if ((h->root.def_dynamic
2816 || h->root.ref_dynamic
2817 || h->root.type == bfd_link_hash_new)
2818 && !h->root.def_regular
2819 && !h->root.ref_regular)
2821 else if (einfo->info->strip == strip_all
2822 || (einfo->info->strip == strip_some
2823 && bfd_hash_lookup (einfo->info->keep_hash,
2824 h->root.root.root.string,
2825 FALSE, FALSE) == NULL))
2833 if (h->esym.ifd == -2)
2836 h->esym.cobol_main = 0;
2837 h->esym.weakext = 0;
2838 h->esym.reserved = 0;
2839 h->esym.ifd = ifdNil;
2840 h->esym.asym.value = 0;
2841 h->esym.asym.st = stGlobal;
2843 if (h->root.root.type == bfd_link_hash_undefined
2844 || h->root.root.type == bfd_link_hash_undefweak)
2848 /* Use undefined class. Also, set class and type for some
2850 name = h->root.root.root.string;
2851 if (strcmp (name, mips_elf_dynsym_rtproc_names[0]) == 0
2852 || strcmp (name, mips_elf_dynsym_rtproc_names[1]) == 0)
2854 h->esym.asym.sc = scData;
2855 h->esym.asym.st = stLabel;
2856 h->esym.asym.value = 0;
2858 else if (strcmp (name, mips_elf_dynsym_rtproc_names[2]) == 0)
2860 h->esym.asym.sc = scAbs;
2861 h->esym.asym.st = stLabel;
2862 h->esym.asym.value =
2863 mips_elf_hash_table (einfo->info)->procedure_count;
2865 else if (strcmp (name, "_gp_disp") == 0 && ! NEWABI_P (einfo->abfd))
2867 h->esym.asym.sc = scAbs;
2868 h->esym.asym.st = stLabel;
2869 h->esym.asym.value = elf_gp (einfo->abfd);
2872 h->esym.asym.sc = scUndefined;
2874 else if (h->root.root.type != bfd_link_hash_defined
2875 && h->root.root.type != bfd_link_hash_defweak)
2876 h->esym.asym.sc = scAbs;
2881 sec = h->root.root.u.def.section;
2882 output_section = sec->output_section;
2884 /* When making a shared library and symbol h is the one from
2885 the another shared library, OUTPUT_SECTION may be null. */
2886 if (output_section == NULL)
2887 h->esym.asym.sc = scUndefined;
2890 name = bfd_section_name (output_section->owner, output_section);
2892 if (strcmp (name, ".text") == 0)
2893 h->esym.asym.sc = scText;
2894 else if (strcmp (name, ".data") == 0)
2895 h->esym.asym.sc = scData;
2896 else if (strcmp (name, ".sdata") == 0)
2897 h->esym.asym.sc = scSData;
2898 else if (strcmp (name, ".rodata") == 0
2899 || strcmp (name, ".rdata") == 0)
2900 h->esym.asym.sc = scRData;
2901 else if (strcmp (name, ".bss") == 0)
2902 h->esym.asym.sc = scBss;
2903 else if (strcmp (name, ".sbss") == 0)
2904 h->esym.asym.sc = scSBss;
2905 else if (strcmp (name, ".init") == 0)
2906 h->esym.asym.sc = scInit;
2907 else if (strcmp (name, ".fini") == 0)
2908 h->esym.asym.sc = scFini;
2910 h->esym.asym.sc = scAbs;
2914 h->esym.asym.reserved = 0;
2915 h->esym.asym.index = indexNil;
2918 if (h->root.root.type == bfd_link_hash_common)
2919 h->esym.asym.value = h->root.root.u.c.size;
2920 else if (h->root.root.type == bfd_link_hash_defined
2921 || h->root.root.type == bfd_link_hash_defweak)
2923 if (h->esym.asym.sc == scCommon)
2924 h->esym.asym.sc = scBss;
2925 else if (h->esym.asym.sc == scSCommon)
2926 h->esym.asym.sc = scSBss;
2928 sec = h->root.root.u.def.section;
2929 output_section = sec->output_section;
2930 if (output_section != NULL)
2931 h->esym.asym.value = (h->root.root.u.def.value
2932 + sec->output_offset
2933 + output_section->vma);
2935 h->esym.asym.value = 0;
2939 struct mips_elf_link_hash_entry *hd = h;
2941 while (hd->root.root.type == bfd_link_hash_indirect)
2942 hd = (struct mips_elf_link_hash_entry *)h->root.root.u.i.link;
2944 if (hd->needs_lazy_stub)
2946 BFD_ASSERT (hd->root.plt.plist != NULL);
2947 BFD_ASSERT (hd->root.plt.plist->stub_offset != MINUS_ONE);
2948 /* Set type and value for a symbol with a function stub. */
2949 h->esym.asym.st = stProc;
2950 sec = hd->root.root.u.def.section;
2952 h->esym.asym.value = 0;
2955 output_section = sec->output_section;
2956 if (output_section != NULL)
2957 h->esym.asym.value = (hd->root.plt.plist->stub_offset
2958 + sec->output_offset
2959 + output_section->vma);
2961 h->esym.asym.value = 0;
2966 if (! bfd_ecoff_debug_one_external (einfo->abfd, einfo->debug, einfo->swap,
2967 h->root.root.root.string,
2970 einfo->failed = TRUE;
2977 /* A comparison routine used to sort .gptab entries. */
2980 gptab_compare (const void *p1, const void *p2)
2982 const Elf32_gptab *a1 = p1;
2983 const Elf32_gptab *a2 = p2;
2985 return a1->gt_entry.gt_g_value - a2->gt_entry.gt_g_value;
2988 /* Functions to manage the got entry hash table. */
2990 /* Use all 64 bits of a bfd_vma for the computation of a 32-bit
2993 static INLINE hashval_t
2994 mips_elf_hash_bfd_vma (bfd_vma addr)
2997 return addr + (addr >> 32);
3004 mips_elf_got_entry_hash (const void *entry_)
3006 const struct mips_got_entry *entry = (struct mips_got_entry *)entry_;
3008 return (entry->symndx
3009 + ((entry->tls_type == GOT_TLS_LDM) << 18)
3010 + (entry->tls_type == GOT_TLS_LDM ? 0
3011 : !entry->abfd ? mips_elf_hash_bfd_vma (entry->d.address)
3012 : entry->symndx >= 0 ? (entry->abfd->id
3013 + mips_elf_hash_bfd_vma (entry->d.addend))
3014 : entry->d.h->root.root.root.hash));
3018 mips_elf_got_entry_eq (const void *entry1, const void *entry2)
3020 const struct mips_got_entry *e1 = (struct mips_got_entry *)entry1;
3021 const struct mips_got_entry *e2 = (struct mips_got_entry *)entry2;
3023 return (e1->symndx == e2->symndx
3024 && e1->tls_type == e2->tls_type
3025 && (e1->tls_type == GOT_TLS_LDM ? TRUE
3026 : !e1->abfd ? !e2->abfd && e1->d.address == e2->d.address
3027 : e1->symndx >= 0 ? (e1->abfd == e2->abfd
3028 && e1->d.addend == e2->d.addend)
3029 : e2->abfd && e1->d.h == e2->d.h));
3033 mips_got_page_ref_hash (const void *ref_)
3035 const struct mips_got_page_ref *ref;
3037 ref = (const struct mips_got_page_ref *) ref_;
3038 return ((ref->symndx >= 0
3039 ? (hashval_t) (ref->u.abfd->id + ref->symndx)
3040 : ref->u.h->root.root.root.hash)
3041 + mips_elf_hash_bfd_vma (ref->addend));
3045 mips_got_page_ref_eq (const void *ref1_, const void *ref2_)
3047 const struct mips_got_page_ref *ref1, *ref2;
3049 ref1 = (const struct mips_got_page_ref *) ref1_;
3050 ref2 = (const struct mips_got_page_ref *) ref2_;
3051 return (ref1->symndx == ref2->symndx
3052 && (ref1->symndx < 0
3053 ? ref1->u.h == ref2->u.h
3054 : ref1->u.abfd == ref2->u.abfd)
3055 && ref1->addend == ref2->addend);
3059 mips_got_page_entry_hash (const void *entry_)
3061 const struct mips_got_page_entry *entry;
3063 entry = (const struct mips_got_page_entry *) entry_;
3064 return entry->sec->id;
3068 mips_got_page_entry_eq (const void *entry1_, const void *entry2_)
3070 const struct mips_got_page_entry *entry1, *entry2;
3072 entry1 = (const struct mips_got_page_entry *) entry1_;
3073 entry2 = (const struct mips_got_page_entry *) entry2_;
3074 return entry1->sec == entry2->sec;
3077 /* Create and return a new mips_got_info structure. */
3079 static struct mips_got_info *
3080 mips_elf_create_got_info (bfd *abfd)
3082 struct mips_got_info *g;
3084 g = bfd_zalloc (abfd, sizeof (struct mips_got_info));
3088 g->got_entries = htab_try_create (1, mips_elf_got_entry_hash,
3089 mips_elf_got_entry_eq, NULL);
3090 if (g->got_entries == NULL)
3093 g->got_page_refs = htab_try_create (1, mips_got_page_ref_hash,
3094 mips_got_page_ref_eq, NULL);
3095 if (g->got_page_refs == NULL)
3101 /* Return the GOT info for input bfd ABFD, trying to create a new one if
3102 CREATE_P and if ABFD doesn't already have a GOT. */
3104 static struct mips_got_info *
3105 mips_elf_bfd_got (bfd *abfd, bfd_boolean create_p)
3107 struct mips_elf_obj_tdata *tdata;
3109 if (!is_mips_elf (abfd))
3112 tdata = mips_elf_tdata (abfd);
3113 if (!tdata->got && create_p)
3114 tdata->got = mips_elf_create_got_info (abfd);
3118 /* Record that ABFD should use output GOT G. */
3121 mips_elf_replace_bfd_got (bfd *abfd, struct mips_got_info *g)
3123 struct mips_elf_obj_tdata *tdata;
3125 BFD_ASSERT (is_mips_elf (abfd));
3126 tdata = mips_elf_tdata (abfd);
3129 /* The GOT structure itself and the hash table entries are
3130 allocated to a bfd, but the hash tables aren't. */
3131 htab_delete (tdata->got->got_entries);
3132 htab_delete (tdata->got->got_page_refs);
3133 if (tdata->got->got_page_entries)
3134 htab_delete (tdata->got->got_page_entries);
3139 /* Return the dynamic relocation section. If it doesn't exist, try to
3140 create a new it if CREATE_P, otherwise return NULL. Also return NULL
3141 if creation fails. */
3144 mips_elf_rel_dyn_section (struct bfd_link_info *info, bfd_boolean create_p)
3150 dname = MIPS_ELF_REL_DYN_NAME (info);
3151 dynobj = elf_hash_table (info)->dynobj;
3152 sreloc = bfd_get_linker_section (dynobj, dname);
3153 if (sreloc == NULL && create_p)
3155 sreloc = bfd_make_section_anyway_with_flags (dynobj, dname,
3160 | SEC_LINKER_CREATED
3163 || ! bfd_set_section_alignment (dynobj, sreloc,
3164 MIPS_ELF_LOG_FILE_ALIGN (dynobj)))
3170 /* Return the GOT_TLS_* type required by relocation type R_TYPE. */
3173 mips_elf_reloc_tls_type (unsigned int r_type)
3175 if (tls_gd_reloc_p (r_type))
3178 if (tls_ldm_reloc_p (r_type))
3181 if (tls_gottprel_reloc_p (r_type))
3184 return GOT_TLS_NONE;
3187 /* Return the number of GOT slots needed for GOT TLS type TYPE. */
3190 mips_tls_got_entries (unsigned int type)
3207 /* Count the number of relocations needed for a TLS GOT entry, with
3208 access types from TLS_TYPE, and symbol H (or a local symbol if H
3212 mips_tls_got_relocs (struct bfd_link_info *info, unsigned char tls_type,
3213 struct elf_link_hash_entry *h)
3216 bfd_boolean need_relocs = FALSE;
3217 bfd_boolean dyn = elf_hash_table (info)->dynamic_sections_created;
3219 if (h && WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, bfd_link_pic (info), h)
3220 && (!bfd_link_pic (info) || !SYMBOL_REFERENCES_LOCAL (info, h)))
3223 if ((bfd_link_pic (info) || indx != 0)
3225 || ELF_ST_VISIBILITY (h->other) == STV_DEFAULT
3226 || h->root.type != bfd_link_hash_undefweak))
3235 return indx != 0 ? 2 : 1;
3241 return bfd_link_pic (info) ? 1 : 0;
3248 /* Add the number of GOT entries and TLS relocations required by ENTRY
3252 mips_elf_count_got_entry (struct bfd_link_info *info,
3253 struct mips_got_info *g,
3254 struct mips_got_entry *entry)
3256 if (entry->tls_type)
3258 g->tls_gotno += mips_tls_got_entries (entry->tls_type);
3259 g->relocs += mips_tls_got_relocs (info, entry->tls_type,
3261 ? &entry->d.h->root : NULL);
3263 else if (entry->symndx >= 0 || entry->d.h->global_got_area == GGA_NONE)
3264 g->local_gotno += 1;
3266 g->global_gotno += 1;
3269 /* Output a simple dynamic relocation into SRELOC. */
3272 mips_elf_output_dynamic_relocation (bfd *output_bfd,
3274 unsigned long reloc_index,
3279 Elf_Internal_Rela rel[3];
3281 memset (rel, 0, sizeof (rel));
3283 rel[0].r_info = ELF_R_INFO (output_bfd, indx, r_type);
3284 rel[0].r_offset = rel[1].r_offset = rel[2].r_offset = offset;
3286 if (ABI_64_P (output_bfd))
3288 (*get_elf_backend_data (output_bfd)->s->swap_reloc_out)
3289 (output_bfd, &rel[0],
3291 + reloc_index * sizeof (Elf64_Mips_External_Rel)));
3294 bfd_elf32_swap_reloc_out
3295 (output_bfd, &rel[0],
3297 + reloc_index * sizeof (Elf32_External_Rel)));
3300 /* Initialize a set of TLS GOT entries for one symbol. */
3303 mips_elf_initialize_tls_slots (bfd *abfd, struct bfd_link_info *info,
3304 struct mips_got_entry *entry,
3305 struct mips_elf_link_hash_entry *h,
3308 struct mips_elf_link_hash_table *htab;
3310 asection *sreloc, *sgot;
3311 bfd_vma got_offset, got_offset2;
3312 bfd_boolean need_relocs = FALSE;
3314 htab = mips_elf_hash_table (info);
3323 bfd_boolean dyn = elf_hash_table (info)->dynamic_sections_created;
3325 if (WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, bfd_link_pic (info),
3327 && (!bfd_link_pic (info)
3328 || !SYMBOL_REFERENCES_LOCAL (info, &h->root)))
3329 indx = h->root.dynindx;
3332 if (entry->tls_initialized)
3335 if ((bfd_link_pic (info) || indx != 0)
3337 || ELF_ST_VISIBILITY (h->root.other) == STV_DEFAULT
3338 || h->root.type != bfd_link_hash_undefweak))
3341 /* MINUS_ONE means the symbol is not defined in this object. It may not
3342 be defined at all; assume that the value doesn't matter in that
3343 case. Otherwise complain if we would use the value. */
3344 BFD_ASSERT (value != MINUS_ONE || (indx != 0 && need_relocs)
3345 || h->root.root.type == bfd_link_hash_undefweak);
3347 /* Emit necessary relocations. */
3348 sreloc = mips_elf_rel_dyn_section (info, FALSE);
3349 got_offset = entry->gotidx;
3351 switch (entry->tls_type)
3354 /* General Dynamic. */
3355 got_offset2 = got_offset + MIPS_ELF_GOT_SIZE (abfd);
3359 mips_elf_output_dynamic_relocation
3360 (abfd, sreloc, sreloc->reloc_count++, indx,
3361 ABI_64_P (abfd) ? R_MIPS_TLS_DTPMOD64 : R_MIPS_TLS_DTPMOD32,
3362 sgot->output_offset + sgot->output_section->vma + got_offset);
3365 mips_elf_output_dynamic_relocation
3366 (abfd, sreloc, sreloc->reloc_count++, indx,
3367 ABI_64_P (abfd) ? R_MIPS_TLS_DTPREL64 : R_MIPS_TLS_DTPREL32,
3368 sgot->output_offset + sgot->output_section->vma + got_offset2);
3370 MIPS_ELF_PUT_WORD (abfd, value - dtprel_base (info),
3371 sgot->contents + got_offset2);
3375 MIPS_ELF_PUT_WORD (abfd, 1,
3376 sgot->contents + got_offset);
3377 MIPS_ELF_PUT_WORD (abfd, value - dtprel_base (info),
3378 sgot->contents + got_offset2);
3383 /* Initial Exec model. */
3387 MIPS_ELF_PUT_WORD (abfd, value - elf_hash_table (info)->tls_sec->vma,
3388 sgot->contents + got_offset);
3390 MIPS_ELF_PUT_WORD (abfd, 0,
3391 sgot->contents + got_offset);
3393 mips_elf_output_dynamic_relocation
3394 (abfd, sreloc, sreloc->reloc_count++, indx,
3395 ABI_64_P (abfd) ? R_MIPS_TLS_TPREL64 : R_MIPS_TLS_TPREL32,
3396 sgot->output_offset + sgot->output_section->vma + got_offset);
3399 MIPS_ELF_PUT_WORD (abfd, value - tprel_base (info),
3400 sgot->contents + got_offset);
3404 /* The initial offset is zero, and the LD offsets will include the
3405 bias by DTP_OFFSET. */
3406 MIPS_ELF_PUT_WORD (abfd, 0,
3407 sgot->contents + got_offset
3408 + MIPS_ELF_GOT_SIZE (abfd));
3410 if (!bfd_link_pic (info))
3411 MIPS_ELF_PUT_WORD (abfd, 1,
3412 sgot->contents + got_offset);
3414 mips_elf_output_dynamic_relocation
3415 (abfd, sreloc, sreloc->reloc_count++, indx,
3416 ABI_64_P (abfd) ? R_MIPS_TLS_DTPMOD64 : R_MIPS_TLS_DTPMOD32,
3417 sgot->output_offset + sgot->output_section->vma + got_offset);
3424 entry->tls_initialized = TRUE;
3427 /* Return the offset from _GLOBAL_OFFSET_TABLE_ of the .got.plt entry
3428 for global symbol H. .got.plt comes before the GOT, so the offset
3429 will be negative. */
3432 mips_elf_gotplt_index (struct bfd_link_info *info,
3433 struct elf_link_hash_entry *h)
3435 bfd_vma got_address, got_value;
3436 struct mips_elf_link_hash_table *htab;
3438 htab = mips_elf_hash_table (info);
3439 BFD_ASSERT (htab != NULL);
3441 BFD_ASSERT (h->plt.plist != NULL);
3442 BFD_ASSERT (h->plt.plist->gotplt_index != MINUS_ONE);
3444 /* Calculate the address of the associated .got.plt entry. */
3445 got_address = (htab->sgotplt->output_section->vma
3446 + htab->sgotplt->output_offset
3447 + (h->plt.plist->gotplt_index
3448 * MIPS_ELF_GOT_SIZE (info->output_bfd)));
3450 /* Calculate the value of _GLOBAL_OFFSET_TABLE_. */
3451 got_value = (htab->root.hgot->root.u.def.section->output_section->vma
3452 + htab->root.hgot->root.u.def.section->output_offset
3453 + htab->root.hgot->root.u.def.value);
3455 return got_address - got_value;
3458 /* Return the GOT offset for address VALUE. If there is not yet a GOT
3459 entry for this value, create one. If R_SYMNDX refers to a TLS symbol,
3460 create a TLS GOT entry instead. Return -1 if no satisfactory GOT
3461 offset can be found. */
3464 mips_elf_local_got_index (bfd *abfd, bfd *ibfd, struct bfd_link_info *info,
3465 bfd_vma value, unsigned long r_symndx,
3466 struct mips_elf_link_hash_entry *h, int r_type)
3468 struct mips_elf_link_hash_table *htab;
3469 struct mips_got_entry *entry;
3471 htab = mips_elf_hash_table (info);
3472 BFD_ASSERT (htab != NULL);
3474 entry = mips_elf_create_local_got_entry (abfd, info, ibfd, value,
3475 r_symndx, h, r_type);
3479 if (entry->tls_type)
3480 mips_elf_initialize_tls_slots (abfd, info, entry, h, value);
3481 return entry->gotidx;
3484 /* Return the GOT index of global symbol H in the primary GOT. */
3487 mips_elf_primary_global_got_index (bfd *obfd, struct bfd_link_info *info,
3488 struct elf_link_hash_entry *h)
3490 struct mips_elf_link_hash_table *htab;
3491 long global_got_dynindx;
3492 struct mips_got_info *g;
3495 htab = mips_elf_hash_table (info);
3496 BFD_ASSERT (htab != NULL);
3498 global_got_dynindx = 0;
3499 if (htab->global_gotsym != NULL)
3500 global_got_dynindx = htab->global_gotsym->dynindx;
3502 /* Once we determine the global GOT entry with the lowest dynamic
3503 symbol table index, we must put all dynamic symbols with greater
3504 indices into the primary GOT. That makes it easy to calculate the
3506 BFD_ASSERT (h->dynindx >= global_got_dynindx);
3507 g = mips_elf_bfd_got (obfd, FALSE);
3508 got_index = ((h->dynindx - global_got_dynindx + g->local_gotno)
3509 * MIPS_ELF_GOT_SIZE (obfd));
3510 BFD_ASSERT (got_index < htab->sgot->size);
3515 /* Return the GOT index for the global symbol indicated by H, which is
3516 referenced by a relocation of type R_TYPE in IBFD. */
3519 mips_elf_global_got_index (bfd *obfd, struct bfd_link_info *info, bfd *ibfd,
3520 struct elf_link_hash_entry *h, int r_type)
3522 struct mips_elf_link_hash_table *htab;
3523 struct mips_got_info *g;
3524 struct mips_got_entry lookup, *entry;
3527 htab = mips_elf_hash_table (info);
3528 BFD_ASSERT (htab != NULL);
3530 g = mips_elf_bfd_got (ibfd, FALSE);
3533 lookup.tls_type = mips_elf_reloc_tls_type (r_type);
3534 if (!lookup.tls_type && g == mips_elf_bfd_got (obfd, FALSE))
3535 return mips_elf_primary_global_got_index (obfd, info, h);
3539 lookup.d.h = (struct mips_elf_link_hash_entry *) h;
3540 entry = htab_find (g->got_entries, &lookup);
3543 gotidx = entry->gotidx;
3544 BFD_ASSERT (gotidx > 0 && gotidx < htab->sgot->size);
3546 if (lookup.tls_type)
3548 bfd_vma value = MINUS_ONE;
3550 if ((h->root.type == bfd_link_hash_defined
3551 || h->root.type == bfd_link_hash_defweak)
3552 && h->root.u.def.section->output_section)
3553 value = (h->root.u.def.value
3554 + h->root.u.def.section->output_offset
3555 + h->root.u.def.section->output_section->vma);
3557 mips_elf_initialize_tls_slots (obfd, info, entry, lookup.d.h, value);
3562 /* Find a GOT page entry that points to within 32KB of VALUE. These
3563 entries are supposed to be placed at small offsets in the GOT, i.e.,
3564 within 32KB of GP. Return the index of the GOT entry, or -1 if no
3565 entry could be created. If OFFSETP is nonnull, use it to return the
3566 offset of the GOT entry from VALUE. */
3569 mips_elf_got_page (bfd *abfd, bfd *ibfd, struct bfd_link_info *info,
3570 bfd_vma value, bfd_vma *offsetp)
3572 bfd_vma page, got_index;
3573 struct mips_got_entry *entry;
3575 page = (value + 0x8000) & ~(bfd_vma) 0xffff;
3576 entry = mips_elf_create_local_got_entry (abfd, info, ibfd, page, 0,
3577 NULL, R_MIPS_GOT_PAGE);
3582 got_index = entry->gotidx;
3585 *offsetp = value - entry->d.address;
3590 /* Find a local GOT entry for an R_MIPS*_GOT16 relocation against VALUE.
3591 EXTERNAL is true if the relocation was originally against a global
3592 symbol that binds locally. */
3595 mips_elf_got16_entry (bfd *abfd, bfd *ibfd, struct bfd_link_info *info,
3596 bfd_vma value, bfd_boolean external)
3598 struct mips_got_entry *entry;
3600 /* GOT16 relocations against local symbols are followed by a LO16
3601 relocation; those against global symbols are not. Thus if the
3602 symbol was originally local, the GOT16 relocation should load the
3603 equivalent of %hi(VALUE), otherwise it should load VALUE itself. */
3605 value = mips_elf_high (value) << 16;
3607 /* It doesn't matter whether the original relocation was R_MIPS_GOT16,
3608 R_MIPS16_GOT16, R_MIPS_CALL16, etc. The format of the entry is the
3609 same in all cases. */
3610 entry = mips_elf_create_local_got_entry (abfd, info, ibfd, value, 0,
3611 NULL, R_MIPS_GOT16);
3613 return entry->gotidx;
3618 /* Returns the offset for the entry at the INDEXth position
3622 mips_elf_got_offset_from_index (struct bfd_link_info *info, bfd *output_bfd,
3623 bfd *input_bfd, bfd_vma got_index)
3625 struct mips_elf_link_hash_table *htab;
3629 htab = mips_elf_hash_table (info);
3630 BFD_ASSERT (htab != NULL);
3633 gp = _bfd_get_gp_value (output_bfd)
3634 + mips_elf_adjust_gp (output_bfd, htab->got_info, input_bfd);
3636 return sgot->output_section->vma + sgot->output_offset + got_index - gp;
3639 /* Create and return a local GOT entry for VALUE, which was calculated
3640 from a symbol belonging to INPUT_SECTON. Return NULL if it could not
3641 be created. If R_SYMNDX refers to a TLS symbol, create a TLS entry
3644 static struct mips_got_entry *
3645 mips_elf_create_local_got_entry (bfd *abfd, struct bfd_link_info *info,
3646 bfd *ibfd, bfd_vma value,
3647 unsigned long r_symndx,
3648 struct mips_elf_link_hash_entry *h,
3651 struct mips_got_entry lookup, *entry;
3653 struct mips_got_info *g;
3654 struct mips_elf_link_hash_table *htab;
3657 htab = mips_elf_hash_table (info);
3658 BFD_ASSERT (htab != NULL);
3660 g = mips_elf_bfd_got (ibfd, FALSE);
3663 g = mips_elf_bfd_got (abfd, FALSE);
3664 BFD_ASSERT (g != NULL);
3667 /* This function shouldn't be called for symbols that live in the global
3669 BFD_ASSERT (h == NULL || h->global_got_area == GGA_NONE);
3671 lookup.tls_type = mips_elf_reloc_tls_type (r_type);
3672 if (lookup.tls_type)
3675 if (tls_ldm_reloc_p (r_type))
3678 lookup.d.addend = 0;
3682 lookup.symndx = r_symndx;
3683 lookup.d.addend = 0;
3691 entry = (struct mips_got_entry *) htab_find (g->got_entries, &lookup);
3694 gotidx = entry->gotidx;
3695 BFD_ASSERT (gotidx > 0 && gotidx < htab->sgot->size);
3702 lookup.d.address = value;
3703 loc = htab_find_slot (g->got_entries, &lookup, INSERT);
3707 entry = (struct mips_got_entry *) *loc;
3711 if (g->assigned_low_gotno > g->assigned_high_gotno)
3713 /* We didn't allocate enough space in the GOT. */
3714 (*_bfd_error_handler)
3715 (_("not enough GOT space for local GOT entries"));
3716 bfd_set_error (bfd_error_bad_value);
3720 entry = (struct mips_got_entry *) bfd_alloc (abfd, sizeof (*entry));
3724 if (got16_reloc_p (r_type)
3725 || call16_reloc_p (r_type)
3726 || got_page_reloc_p (r_type)
3727 || got_disp_reloc_p (r_type))
3728 lookup.gotidx = MIPS_ELF_GOT_SIZE (abfd) * g->assigned_low_gotno++;
3730 lookup.gotidx = MIPS_ELF_GOT_SIZE (abfd) * g->assigned_high_gotno--;
3735 MIPS_ELF_PUT_WORD (abfd, value, htab->sgot->contents + entry->gotidx);
3737 /* These GOT entries need a dynamic relocation on VxWorks. */
3738 if (htab->is_vxworks)
3740 Elf_Internal_Rela outrel;
3743 bfd_vma got_address;
3745 s = mips_elf_rel_dyn_section (info, FALSE);
3746 got_address = (htab->sgot->output_section->vma
3747 + htab->sgot->output_offset
3750 rloc = s->contents + (s->reloc_count++ * sizeof (Elf32_External_Rela));
3751 outrel.r_offset = got_address;
3752 outrel.r_info = ELF32_R_INFO (STN_UNDEF, R_MIPS_32);
3753 outrel.r_addend = value;
3754 bfd_elf32_swap_reloca_out (abfd, &outrel, rloc);
3760 /* Return the number of dynamic section symbols required by OUTPUT_BFD.
3761 The number might be exact or a worst-case estimate, depending on how
3762 much information is available to elf_backend_omit_section_dynsym at
3763 the current linking stage. */
3765 static bfd_size_type
3766 count_section_dynsyms (bfd *output_bfd, struct bfd_link_info *info)
3768 bfd_size_type count;
3771 if (bfd_link_pic (info)
3772 || elf_hash_table (info)->is_relocatable_executable)
3775 const struct elf_backend_data *bed;
3777 bed = get_elf_backend_data (output_bfd);
3778 for (p = output_bfd->sections; p ; p = p->next)
3779 if ((p->flags & SEC_EXCLUDE) == 0
3780 && (p->flags & SEC_ALLOC) != 0
3781 && !(*bed->elf_backend_omit_section_dynsym) (output_bfd, info, p))
3787 /* Sort the dynamic symbol table so that symbols that need GOT entries
3788 appear towards the end. */
3791 mips_elf_sort_hash_table (bfd *abfd, struct bfd_link_info *info)
3793 struct mips_elf_link_hash_table *htab;
3794 struct mips_elf_hash_sort_data hsd;
3795 struct mips_got_info *g;
3797 if (elf_hash_table (info)->dynsymcount == 0)
3800 htab = mips_elf_hash_table (info);
3801 BFD_ASSERT (htab != NULL);
3808 hsd.max_unref_got_dynindx
3809 = hsd.min_got_dynindx
3810 = (elf_hash_table (info)->dynsymcount - g->reloc_only_gotno);
3811 hsd.max_non_got_dynindx = count_section_dynsyms (abfd, info) + 1;
3812 mips_elf_link_hash_traverse (((struct mips_elf_link_hash_table *)
3813 elf_hash_table (info)),
3814 mips_elf_sort_hash_table_f,
3817 /* There should have been enough room in the symbol table to
3818 accommodate both the GOT and non-GOT symbols. */
3819 BFD_ASSERT (hsd.max_non_got_dynindx <= hsd.min_got_dynindx);
3820 BFD_ASSERT ((unsigned long) hsd.max_unref_got_dynindx
3821 == elf_hash_table (info)->dynsymcount);
3822 BFD_ASSERT (elf_hash_table (info)->dynsymcount - hsd.min_got_dynindx
3823 == g->global_gotno);
3825 /* Now we know which dynamic symbol has the lowest dynamic symbol
3826 table index in the GOT. */
3827 htab->global_gotsym = hsd.low;
3832 /* If H needs a GOT entry, assign it the highest available dynamic
3833 index. Otherwise, assign it the lowest available dynamic
3837 mips_elf_sort_hash_table_f (struct mips_elf_link_hash_entry *h, void *data)
3839 struct mips_elf_hash_sort_data *hsd = data;
3841 /* Symbols without dynamic symbol table entries aren't interesting
3843 if (h->root.dynindx == -1)
3846 switch (h->global_got_area)
3849 h->root.dynindx = hsd->max_non_got_dynindx++;
3853 h->root.dynindx = --hsd->min_got_dynindx;
3854 hsd->low = (struct elf_link_hash_entry *) h;
3857 case GGA_RELOC_ONLY:
3858 if (hsd->max_unref_got_dynindx == hsd->min_got_dynindx)
3859 hsd->low = (struct elf_link_hash_entry *) h;
3860 h->root.dynindx = hsd->max_unref_got_dynindx++;
3867 /* Record that input bfd ABFD requires a GOT entry like *LOOKUP
3868 (which is owned by the caller and shouldn't be added to the
3869 hash table directly). */
3872 mips_elf_record_got_entry (struct bfd_link_info *info, bfd *abfd,
3873 struct mips_got_entry *lookup)
3875 struct mips_elf_link_hash_table *htab;
3876 struct mips_got_entry *entry;
3877 struct mips_got_info *g;
3878 void **loc, **bfd_loc;
3880 /* Make sure there's a slot for this entry in the master GOT. */
3881 htab = mips_elf_hash_table (info);
3883 loc = htab_find_slot (g->got_entries, lookup, INSERT);
3887 /* Populate the entry if it isn't already. */
3888 entry = (struct mips_got_entry *) *loc;
3891 entry = (struct mips_got_entry *) bfd_alloc (abfd, sizeof (*entry));
3895 lookup->tls_initialized = FALSE;
3896 lookup->gotidx = -1;
3901 /* Reuse the same GOT entry for the BFD's GOT. */
3902 g = mips_elf_bfd_got (abfd, TRUE);
3906 bfd_loc = htab_find_slot (g->got_entries, lookup, INSERT);
3915 /* ABFD has a GOT relocation of type R_TYPE against H. Reserve a GOT
3916 entry for it. FOR_CALL is true if the caller is only interested in
3917 using the GOT entry for calls. */
3920 mips_elf_record_global_got_symbol (struct elf_link_hash_entry *h,
3921 bfd *abfd, struct bfd_link_info *info,
3922 bfd_boolean for_call, int r_type)
3924 struct mips_elf_link_hash_table *htab;
3925 struct mips_elf_link_hash_entry *hmips;
3926 struct mips_got_entry entry;
3927 unsigned char tls_type;
3929 htab = mips_elf_hash_table (info);
3930 BFD_ASSERT (htab != NULL);
3932 hmips = (struct mips_elf_link_hash_entry *) h;
3934 hmips->got_only_for_calls = FALSE;
3936 /* A global symbol in the GOT must also be in the dynamic symbol
3938 if (h->dynindx == -1)
3940 switch (ELF_ST_VISIBILITY (h->other))
3944 _bfd_elf_link_hash_hide_symbol (info, h, TRUE);
3947 if (!bfd_elf_link_record_dynamic_symbol (info, h))
3951 tls_type = mips_elf_reloc_tls_type (r_type);
3952 if (tls_type == GOT_TLS_NONE && hmips->global_got_area > GGA_NORMAL)
3953 hmips->global_got_area = GGA_NORMAL;
3957 entry.d.h = (struct mips_elf_link_hash_entry *) h;
3958 entry.tls_type = tls_type;
3959 return mips_elf_record_got_entry (info, abfd, &entry);
3962 /* ABFD has a GOT relocation of type R_TYPE against symbol SYMNDX + ADDEND,
3963 where SYMNDX is a local symbol. Reserve a GOT entry for it. */
3966 mips_elf_record_local_got_symbol (bfd *abfd, long symndx, bfd_vma addend,
3967 struct bfd_link_info *info, int r_type)
3969 struct mips_elf_link_hash_table *htab;
3970 struct mips_got_info *g;
3971 struct mips_got_entry entry;
3973 htab = mips_elf_hash_table (info);
3974 BFD_ASSERT (htab != NULL);
3977 BFD_ASSERT (g != NULL);
3980 entry.symndx = symndx;
3981 entry.d.addend = addend;
3982 entry.tls_type = mips_elf_reloc_tls_type (r_type);
3983 return mips_elf_record_got_entry (info, abfd, &entry);
3986 /* Record that ABFD has a page relocation against SYMNDX + ADDEND.
3987 H is the symbol's hash table entry, or null if SYMNDX is local
3991 mips_elf_record_got_page_ref (struct bfd_link_info *info, bfd *abfd,
3992 long symndx, struct elf_link_hash_entry *h,
3993 bfd_signed_vma addend)
3995 struct mips_elf_link_hash_table *htab;
3996 struct mips_got_info *g1, *g2;
3997 struct mips_got_page_ref lookup, *entry;
3998 void **loc, **bfd_loc;
4000 htab = mips_elf_hash_table (info);
4001 BFD_ASSERT (htab != NULL);
4003 g1 = htab->got_info;
4004 BFD_ASSERT (g1 != NULL);
4009 lookup.u.h = (struct mips_elf_link_hash_entry *) h;
4013 lookup.symndx = symndx;
4014 lookup.u.abfd = abfd;
4016 lookup.addend = addend;
4017 loc = htab_find_slot (g1->got_page_refs, &lookup, INSERT);
4021 entry = (struct mips_got_page_ref *) *loc;
4024 entry = bfd_alloc (abfd, sizeof (*entry));
4032 /* Add the same entry to the BFD's GOT. */
4033 g2 = mips_elf_bfd_got (abfd, TRUE);
4037 bfd_loc = htab_find_slot (g2->got_page_refs, &lookup, INSERT);
4047 /* Add room for N relocations to the .rel(a).dyn section in ABFD. */
4050 mips_elf_allocate_dynamic_relocations (bfd *abfd, struct bfd_link_info *info,
4054 struct mips_elf_link_hash_table *htab;
4056 htab = mips_elf_hash_table (info);
4057 BFD_ASSERT (htab != NULL);
4059 s = mips_elf_rel_dyn_section (info, FALSE);
4060 BFD_ASSERT (s != NULL);
4062 if (htab->is_vxworks)
4063 s->size += n * MIPS_ELF_RELA_SIZE (abfd);
4068 /* Make room for a null element. */
4069 s->size += MIPS_ELF_REL_SIZE (abfd);
4072 s->size += n * MIPS_ELF_REL_SIZE (abfd);
4076 /* A htab_traverse callback for GOT entries, with DATA pointing to a
4077 mips_elf_traverse_got_arg structure. Count the number of GOT
4078 entries and TLS relocs. Set DATA->value to true if we need
4079 to resolve indirect or warning symbols and then recreate the GOT. */
4082 mips_elf_check_recreate_got (void **entryp, void *data)
4084 struct mips_got_entry *entry;
4085 struct mips_elf_traverse_got_arg *arg;
4087 entry = (struct mips_got_entry *) *entryp;
4088 arg = (struct mips_elf_traverse_got_arg *) data;
4089 if (entry->abfd != NULL && entry->symndx == -1)
4091 struct mips_elf_link_hash_entry *h;
4094 if (h->root.root.type == bfd_link_hash_indirect
4095 || h->root.root.type == bfd_link_hash_warning)
4101 mips_elf_count_got_entry (arg->info, arg->g, entry);
4105 /* A htab_traverse callback for GOT entries, with DATA pointing to a
4106 mips_elf_traverse_got_arg structure. Add all entries to DATA->g,
4107 converting entries for indirect and warning symbols into entries
4108 for the target symbol. Set DATA->g to null on error. */
4111 mips_elf_recreate_got (void **entryp, void *data)
4113 struct mips_got_entry new_entry, *entry;
4114 struct mips_elf_traverse_got_arg *arg;
4117 entry = (struct mips_got_entry *) *entryp;
4118 arg = (struct mips_elf_traverse_got_arg *) data;
4119 if (entry->abfd != NULL
4120 && entry->symndx == -1
4121 && (entry->d.h->root.root.type == bfd_link_hash_indirect
4122 || entry->d.h->root.root.type == bfd_link_hash_warning))
4124 struct mips_elf_link_hash_entry *h;
4131 BFD_ASSERT (h->global_got_area == GGA_NONE);
4132 h = (struct mips_elf_link_hash_entry *) h->root.root.u.i.link;
4134 while (h->root.root.type == bfd_link_hash_indirect
4135 || h->root.root.type == bfd_link_hash_warning);
4138 slot = htab_find_slot (arg->g->got_entries, entry, INSERT);
4146 if (entry == &new_entry)
4148 entry = bfd_alloc (entry->abfd, sizeof (*entry));
4157 mips_elf_count_got_entry (arg->info, arg->g, entry);
4162 /* Return the maximum number of GOT page entries required for RANGE. */
4165 mips_elf_pages_for_range (const struct mips_got_page_range *range)
4167 return (range->max_addend - range->min_addend + 0x1ffff) >> 16;
4170 /* Record that G requires a page entry that can reach SEC + ADDEND. */
4173 mips_elf_record_got_page_entry (struct mips_elf_traverse_got_arg *arg,
4174 asection *sec, bfd_signed_vma addend)
4176 struct mips_got_info *g = arg->g;
4177 struct mips_got_page_entry lookup, *entry;
4178 struct mips_got_page_range **range_ptr, *range;
4179 bfd_vma old_pages, new_pages;
4182 /* Find the mips_got_page_entry hash table entry for this section. */
4184 loc = htab_find_slot (g->got_page_entries, &lookup, INSERT);
4188 /* Create a mips_got_page_entry if this is the first time we've
4189 seen the section. */
4190 entry = (struct mips_got_page_entry *) *loc;
4193 entry = bfd_zalloc (arg->info->output_bfd, sizeof (*entry));
4201 /* Skip over ranges whose maximum extent cannot share a page entry
4203 range_ptr = &entry->ranges;
4204 while (*range_ptr && addend > (*range_ptr)->max_addend + 0xffff)
4205 range_ptr = &(*range_ptr)->next;
4207 /* If we scanned to the end of the list, or found a range whose
4208 minimum extent cannot share a page entry with ADDEND, create
4209 a new singleton range. */
4211 if (!range || addend < range->min_addend - 0xffff)
4213 range = bfd_zalloc (arg->info->output_bfd, sizeof (*range));
4217 range->next = *range_ptr;
4218 range->min_addend = addend;
4219 range->max_addend = addend;
4227 /* Remember how many pages the old range contributed. */
4228 old_pages = mips_elf_pages_for_range (range);
4230 /* Update the ranges. */
4231 if (addend < range->min_addend)
4232 range->min_addend = addend;
4233 else if (addend > range->max_addend)
4235 if (range->next && addend >= range->next->min_addend - 0xffff)
4237 old_pages += mips_elf_pages_for_range (range->next);
4238 range->max_addend = range->next->max_addend;
4239 range->next = range->next->next;
4242 range->max_addend = addend;
4245 /* Record any change in the total estimate. */
4246 new_pages = mips_elf_pages_for_range (range);
4247 if (old_pages != new_pages)
4249 entry->num_pages += new_pages - old_pages;
4250 g->page_gotno += new_pages - old_pages;
4256 /* A htab_traverse callback for which *REFP points to a mips_got_page_ref
4257 and for which DATA points to a mips_elf_traverse_got_arg. Work out
4258 whether the page reference described by *REFP needs a GOT page entry,
4259 and record that entry in DATA->g if so. Set DATA->g to null on failure. */
4262 mips_elf_resolve_got_page_ref (void **refp, void *data)
4264 struct mips_got_page_ref *ref;
4265 struct mips_elf_traverse_got_arg *arg;
4266 struct mips_elf_link_hash_table *htab;
4270 ref = (struct mips_got_page_ref *) *refp;
4271 arg = (struct mips_elf_traverse_got_arg *) data;
4272 htab = mips_elf_hash_table (arg->info);
4274 if (ref->symndx < 0)
4276 struct mips_elf_link_hash_entry *h;
4278 /* Global GOT_PAGEs decay to GOT_DISP and so don't need page entries. */
4280 if (!SYMBOL_REFERENCES_LOCAL (arg->info, &h->root))
4283 /* Ignore undefined symbols; we'll issue an error later if
4285 if (!((h->root.root.type == bfd_link_hash_defined
4286 || h->root.root.type == bfd_link_hash_defweak)
4287 && h->root.root.u.def.section))
4290 sec = h->root.root.u.def.section;
4291 addend = h->root.root.u.def.value + ref->addend;
4295 Elf_Internal_Sym *isym;
4297 /* Read in the symbol. */
4298 isym = bfd_sym_from_r_symndx (&htab->sym_cache, ref->u.abfd,
4306 /* Get the associated input section. */
4307 sec = bfd_section_from_elf_index (ref->u.abfd, isym->st_shndx);
4314 /* If this is a mergable section, work out the section and offset
4315 of the merged data. For section symbols, the addend specifies
4316 of the offset _of_ the first byte in the data, otherwise it
4317 specifies the offset _from_ the first byte. */
4318 if (sec->flags & SEC_MERGE)
4322 secinfo = elf_section_data (sec)->sec_info;
4323 if (ELF_ST_TYPE (isym->st_info) == STT_SECTION)
4324 addend = _bfd_merged_section_offset (ref->u.abfd, &sec, secinfo,
4325 isym->st_value + ref->addend);
4327 addend = _bfd_merged_section_offset (ref->u.abfd, &sec, secinfo,
4328 isym->st_value) + ref->addend;
4331 addend = isym->st_value + ref->addend;
4333 if (!mips_elf_record_got_page_entry (arg, sec, addend))
4341 /* If any entries in G->got_entries are for indirect or warning symbols,
4342 replace them with entries for the target symbol. Convert g->got_page_refs
4343 into got_page_entry structures and estimate the number of page entries
4344 that they require. */
4347 mips_elf_resolve_final_got_entries (struct bfd_link_info *info,
4348 struct mips_got_info *g)
4350 struct mips_elf_traverse_got_arg tga;
4351 struct mips_got_info oldg;
4358 htab_traverse (g->got_entries, mips_elf_check_recreate_got, &tga);
4362 g->got_entries = htab_create (htab_size (oldg.got_entries),
4363 mips_elf_got_entry_hash,
4364 mips_elf_got_entry_eq, NULL);
4365 if (!g->got_entries)
4368 htab_traverse (oldg.got_entries, mips_elf_recreate_got, &tga);
4372 htab_delete (oldg.got_entries);
4375 g->got_page_entries = htab_try_create (1, mips_got_page_entry_hash,
4376 mips_got_page_entry_eq, NULL);
4377 if (g->got_page_entries == NULL)
4382 htab_traverse (g->got_page_refs, mips_elf_resolve_got_page_ref, &tga);
4387 /* Return true if a GOT entry for H should live in the local rather than
4391 mips_use_local_got_p (struct bfd_link_info *info,
4392 struct mips_elf_link_hash_entry *h)
4394 /* Symbols that aren't in the dynamic symbol table must live in the
4395 local GOT. This includes symbols that are completely undefined
4396 and which therefore don't bind locally. We'll report undefined
4397 symbols later if appropriate. */
4398 if (h->root.dynindx == -1)
4401 /* Symbols that bind locally can (and in the case of forced-local
4402 symbols, must) live in the local GOT. */
4403 if (h->got_only_for_calls
4404 ? SYMBOL_CALLS_LOCAL (info, &h->root)
4405 : SYMBOL_REFERENCES_LOCAL (info, &h->root))
4408 /* If this is an executable that must provide a definition of the symbol,
4409 either though PLTs or copy relocations, then that address should go in
4410 the local rather than global GOT. */
4411 if (bfd_link_executable (info) && h->has_static_relocs)
4417 /* A mips_elf_link_hash_traverse callback for which DATA points to the
4418 link_info structure. Decide whether the hash entry needs an entry in
4419 the global part of the primary GOT, setting global_got_area accordingly.
4420 Count the number of global symbols that are in the primary GOT only
4421 because they have relocations against them (reloc_only_gotno). */
4424 mips_elf_count_got_symbols (struct mips_elf_link_hash_entry *h, void *data)
4426 struct bfd_link_info *info;
4427 struct mips_elf_link_hash_table *htab;
4428 struct mips_got_info *g;
4430 info = (struct bfd_link_info *) data;
4431 htab = mips_elf_hash_table (info);
4433 if (h->global_got_area != GGA_NONE)
4435 /* Make a final decision about whether the symbol belongs in the
4436 local or global GOT. */
4437 if (mips_use_local_got_p (info, h))
4438 /* The symbol belongs in the local GOT. We no longer need this
4439 entry if it was only used for relocations; those relocations
4440 will be against the null or section symbol instead of H. */
4441 h->global_got_area = GGA_NONE;
4442 else if (htab->is_vxworks
4443 && h->got_only_for_calls
4444 && h->root.plt.plist->mips_offset != MINUS_ONE)
4445 /* On VxWorks, calls can refer directly to the .got.plt entry;
4446 they don't need entries in the regular GOT. .got.plt entries
4447 will be allocated by _bfd_mips_elf_adjust_dynamic_symbol. */
4448 h->global_got_area = GGA_NONE;
4449 else if (h->global_got_area == GGA_RELOC_ONLY)
4451 g->reloc_only_gotno++;
4458 /* A htab_traverse callback for GOT entries. Add each one to the GOT
4459 given in mips_elf_traverse_got_arg DATA. Clear DATA->G on error. */
4462 mips_elf_add_got_entry (void **entryp, void *data)
4464 struct mips_got_entry *entry;
4465 struct mips_elf_traverse_got_arg *arg;
4468 entry = (struct mips_got_entry *) *entryp;
4469 arg = (struct mips_elf_traverse_got_arg *) data;
4470 slot = htab_find_slot (arg->g->got_entries, entry, INSERT);
4479 mips_elf_count_got_entry (arg->info, arg->g, entry);
4484 /* A htab_traverse callback for GOT page entries. Add each one to the GOT
4485 given in mips_elf_traverse_got_arg DATA. Clear DATA->G on error. */
4488 mips_elf_add_got_page_entry (void **entryp, void *data)
4490 struct mips_got_page_entry *entry;
4491 struct mips_elf_traverse_got_arg *arg;
4494 entry = (struct mips_got_page_entry *) *entryp;
4495 arg = (struct mips_elf_traverse_got_arg *) data;
4496 slot = htab_find_slot (arg->g->got_page_entries, entry, INSERT);
4505 arg->g->page_gotno += entry->num_pages;
4510 /* Consider merging FROM, which is ABFD's GOT, into TO. Return -1 if
4511 this would lead to overflow, 1 if they were merged successfully,
4512 and 0 if a merge failed due to lack of memory. (These values are chosen
4513 so that nonnegative return values can be returned by a htab_traverse
4517 mips_elf_merge_got_with (bfd *abfd, struct mips_got_info *from,
4518 struct mips_got_info *to,
4519 struct mips_elf_got_per_bfd_arg *arg)
4521 struct mips_elf_traverse_got_arg tga;
4522 unsigned int estimate;
4524 /* Work out how many page entries we would need for the combined GOT. */
4525 estimate = arg->max_pages;
4526 if (estimate >= from->page_gotno + to->page_gotno)
4527 estimate = from->page_gotno + to->page_gotno;
4529 /* And conservatively estimate how many local and TLS entries
4531 estimate += from->local_gotno + to->local_gotno;
4532 estimate += from->tls_gotno + to->tls_gotno;
4534 /* If we're merging with the primary got, any TLS relocations will
4535 come after the full set of global entries. Otherwise estimate those
4536 conservatively as well. */
4537 if (to == arg->primary && from->tls_gotno + to->tls_gotno)
4538 estimate += arg->global_count;
4540 estimate += from->global_gotno + to->global_gotno;
4542 /* Bail out if the combined GOT might be too big. */
4543 if (estimate > arg->max_count)
4546 /* Transfer the bfd's got information from FROM to TO. */
4547 tga.info = arg->info;
4549 htab_traverse (from->got_entries, mips_elf_add_got_entry, &tga);
4553 htab_traverse (from->got_page_entries, mips_elf_add_got_page_entry, &tga);
4557 mips_elf_replace_bfd_got (abfd, to);
4561 /* Attempt to merge GOT G, which belongs to ABFD. Try to use as much
4562 as possible of the primary got, since it doesn't require explicit
4563 dynamic relocations, but don't use bfds that would reference global
4564 symbols out of the addressable range. Failing the primary got,
4565 attempt to merge with the current got, or finish the current got
4566 and then make make the new got current. */
4569 mips_elf_merge_got (bfd *abfd, struct mips_got_info *g,
4570 struct mips_elf_got_per_bfd_arg *arg)
4572 unsigned int estimate;
4575 if (!mips_elf_resolve_final_got_entries (arg->info, g))
4578 /* Work out the number of page, local and TLS entries. */
4579 estimate = arg->max_pages;
4580 if (estimate > g->page_gotno)
4581 estimate = g->page_gotno;
4582 estimate += g->local_gotno + g->tls_gotno;
4584 /* We place TLS GOT entries after both locals and globals. The globals
4585 for the primary GOT may overflow the normal GOT size limit, so be
4586 sure not to merge a GOT which requires TLS with the primary GOT in that
4587 case. This doesn't affect non-primary GOTs. */
4588 estimate += (g->tls_gotno > 0 ? arg->global_count : g->global_gotno);
4590 if (estimate <= arg->max_count)
4592 /* If we don't have a primary GOT, use it as
4593 a starting point for the primary GOT. */
4600 /* Try merging with the primary GOT. */
4601 result = mips_elf_merge_got_with (abfd, g, arg->primary, arg);
4606 /* If we can merge with the last-created got, do it. */
4609 result = mips_elf_merge_got_with (abfd, g, arg->current, arg);
4614 /* Well, we couldn't merge, so create a new GOT. Don't check if it
4615 fits; if it turns out that it doesn't, we'll get relocation
4616 overflows anyway. */
4617 g->next = arg->current;
4623 /* ENTRYP is a hash table entry for a mips_got_entry. Set its gotidx
4624 to GOTIDX, duplicating the entry if it has already been assigned
4625 an index in a different GOT. */
4628 mips_elf_set_gotidx (void **entryp, long gotidx)
4630 struct mips_got_entry *entry;
4632 entry = (struct mips_got_entry *) *entryp;
4633 if (entry->gotidx > 0)
4635 struct mips_got_entry *new_entry;
4637 new_entry = bfd_alloc (entry->abfd, sizeof (*entry));
4641 *new_entry = *entry;
4642 *entryp = new_entry;
4645 entry->gotidx = gotidx;
4649 /* Set the TLS GOT index for the GOT entry in ENTRYP. DATA points to a
4650 mips_elf_traverse_got_arg in which DATA->value is the size of one
4651 GOT entry. Set DATA->g to null on failure. */
4654 mips_elf_initialize_tls_index (void **entryp, void *data)
4656 struct mips_got_entry *entry;
4657 struct mips_elf_traverse_got_arg *arg;
4659 /* We're only interested in TLS symbols. */
4660 entry = (struct mips_got_entry *) *entryp;
4661 if (entry->tls_type == GOT_TLS_NONE)
4664 arg = (struct mips_elf_traverse_got_arg *) data;
4665 if (!mips_elf_set_gotidx (entryp, arg->value * arg->g->tls_assigned_gotno))
4671 /* Account for the entries we've just allocated. */
4672 arg->g->tls_assigned_gotno += mips_tls_got_entries (entry->tls_type);
4676 /* A htab_traverse callback for GOT entries, where DATA points to a
4677 mips_elf_traverse_got_arg. Set the global_got_area of each global
4678 symbol to DATA->value. */
4681 mips_elf_set_global_got_area (void **entryp, void *data)
4683 struct mips_got_entry *entry;
4684 struct mips_elf_traverse_got_arg *arg;
4686 entry = (struct mips_got_entry *) *entryp;
4687 arg = (struct mips_elf_traverse_got_arg *) data;
4688 if (entry->abfd != NULL
4689 && entry->symndx == -1
4690 && entry->d.h->global_got_area != GGA_NONE)
4691 entry->d.h->global_got_area = arg->value;
4695 /* A htab_traverse callback for secondary GOT entries, where DATA points
4696 to a mips_elf_traverse_got_arg. Assign GOT indices to global entries
4697 and record the number of relocations they require. DATA->value is
4698 the size of one GOT entry. Set DATA->g to null on failure. */
4701 mips_elf_set_global_gotidx (void **entryp, void *data)
4703 struct mips_got_entry *entry;
4704 struct mips_elf_traverse_got_arg *arg;
4706 entry = (struct mips_got_entry *) *entryp;
4707 arg = (struct mips_elf_traverse_got_arg *) data;
4708 if (entry->abfd != NULL
4709 && entry->symndx == -1
4710 && entry->d.h->global_got_area != GGA_NONE)
4712 if (!mips_elf_set_gotidx (entryp, arg->value * arg->g->assigned_low_gotno))
4717 arg->g->assigned_low_gotno += 1;
4719 if (bfd_link_pic (arg->info)
4720 || (elf_hash_table (arg->info)->dynamic_sections_created
4721 && entry->d.h->root.def_dynamic
4722 && !entry->d.h->root.def_regular))
4723 arg->g->relocs += 1;
4729 /* A htab_traverse callback for GOT entries for which DATA is the
4730 bfd_link_info. Forbid any global symbols from having traditional
4731 lazy-binding stubs. */
4734 mips_elf_forbid_lazy_stubs (void **entryp, void *data)
4736 struct bfd_link_info *info;
4737 struct mips_elf_link_hash_table *htab;
4738 struct mips_got_entry *entry;
4740 entry = (struct mips_got_entry *) *entryp;
4741 info = (struct bfd_link_info *) data;
4742 htab = mips_elf_hash_table (info);
4743 BFD_ASSERT (htab != NULL);
4745 if (entry->abfd != NULL
4746 && entry->symndx == -1
4747 && entry->d.h->needs_lazy_stub)
4749 entry->d.h->needs_lazy_stub = FALSE;
4750 htab->lazy_stub_count--;
4756 /* Return the offset of an input bfd IBFD's GOT from the beginning of
4759 mips_elf_adjust_gp (bfd *abfd, struct mips_got_info *g, bfd *ibfd)
4764 g = mips_elf_bfd_got (ibfd, FALSE);
4768 BFD_ASSERT (g->next);
4772 return (g->local_gotno + g->global_gotno + g->tls_gotno)
4773 * MIPS_ELF_GOT_SIZE (abfd);
4776 /* Turn a single GOT that is too big for 16-bit addressing into
4777 a sequence of GOTs, each one 16-bit addressable. */
4780 mips_elf_multi_got (bfd *abfd, struct bfd_link_info *info,
4781 asection *got, bfd_size_type pages)
4783 struct mips_elf_link_hash_table *htab;
4784 struct mips_elf_got_per_bfd_arg got_per_bfd_arg;
4785 struct mips_elf_traverse_got_arg tga;
4786 struct mips_got_info *g, *gg;
4787 unsigned int assign, needed_relocs;
4790 dynobj = elf_hash_table (info)->dynobj;
4791 htab = mips_elf_hash_table (info);
4792 BFD_ASSERT (htab != NULL);
4796 got_per_bfd_arg.obfd = abfd;
4797 got_per_bfd_arg.info = info;
4798 got_per_bfd_arg.current = NULL;
4799 got_per_bfd_arg.primary = NULL;
4800 got_per_bfd_arg.max_count = ((MIPS_ELF_GOT_MAX_SIZE (info)
4801 / MIPS_ELF_GOT_SIZE (abfd))
4802 - htab->reserved_gotno);
4803 got_per_bfd_arg.max_pages = pages;
4804 /* The number of globals that will be included in the primary GOT.
4805 See the calls to mips_elf_set_global_got_area below for more
4807 got_per_bfd_arg.global_count = g->global_gotno;
4809 /* Try to merge the GOTs of input bfds together, as long as they
4810 don't seem to exceed the maximum GOT size, choosing one of them
4811 to be the primary GOT. */
4812 for (ibfd = info->input_bfds; ibfd; ibfd = ibfd->link.next)
4814 gg = mips_elf_bfd_got (ibfd, FALSE);
4815 if (gg && !mips_elf_merge_got (ibfd, gg, &got_per_bfd_arg))
4819 /* If we do not find any suitable primary GOT, create an empty one. */
4820 if (got_per_bfd_arg.primary == NULL)
4821 g->next = mips_elf_create_got_info (abfd);
4823 g->next = got_per_bfd_arg.primary;
4824 g->next->next = got_per_bfd_arg.current;
4826 /* GG is now the master GOT, and G is the primary GOT. */
4830 /* Map the output bfd to the primary got. That's what we're going
4831 to use for bfds that use GOT16 or GOT_PAGE relocations that we
4832 didn't mark in check_relocs, and we want a quick way to find it.
4833 We can't just use gg->next because we're going to reverse the
4835 mips_elf_replace_bfd_got (abfd, g);
4837 /* Every symbol that is referenced in a dynamic relocation must be
4838 present in the primary GOT, so arrange for them to appear after
4839 those that are actually referenced. */
4840 gg->reloc_only_gotno = gg->global_gotno - g->global_gotno;
4841 g->global_gotno = gg->global_gotno;
4844 tga.value = GGA_RELOC_ONLY;
4845 htab_traverse (gg->got_entries, mips_elf_set_global_got_area, &tga);
4846 tga.value = GGA_NORMAL;
4847 htab_traverse (g->got_entries, mips_elf_set_global_got_area, &tga);
4849 /* Now go through the GOTs assigning them offset ranges.
4850 [assigned_low_gotno, local_gotno[ will be set to the range of local
4851 entries in each GOT. We can then compute the end of a GOT by
4852 adding local_gotno to global_gotno. We reverse the list and make
4853 it circular since then we'll be able to quickly compute the
4854 beginning of a GOT, by computing the end of its predecessor. To
4855 avoid special cases for the primary GOT, while still preserving
4856 assertions that are valid for both single- and multi-got links,
4857 we arrange for the main got struct to have the right number of
4858 global entries, but set its local_gotno such that the initial
4859 offset of the primary GOT is zero. Remember that the primary GOT
4860 will become the last item in the circular linked list, so it
4861 points back to the master GOT. */
4862 gg->local_gotno = -g->global_gotno;
4863 gg->global_gotno = g->global_gotno;
4870 struct mips_got_info *gn;
4872 assign += htab->reserved_gotno;
4873 g->assigned_low_gotno = assign;
4874 g->local_gotno += assign;
4875 g->local_gotno += (pages < g->page_gotno ? pages : g->page_gotno);
4876 g->assigned_high_gotno = g->local_gotno - 1;
4877 assign = g->local_gotno + g->global_gotno + g->tls_gotno;
4879 /* Take g out of the direct list, and push it onto the reversed
4880 list that gg points to. g->next is guaranteed to be nonnull after
4881 this operation, as required by mips_elf_initialize_tls_index. */
4886 /* Set up any TLS entries. We always place the TLS entries after
4887 all non-TLS entries. */
4888 g->tls_assigned_gotno = g->local_gotno + g->global_gotno;
4890 tga.value = MIPS_ELF_GOT_SIZE (abfd);
4891 htab_traverse (g->got_entries, mips_elf_initialize_tls_index, &tga);
4894 BFD_ASSERT (g->tls_assigned_gotno == assign);
4896 /* Move onto the next GOT. It will be a secondary GOT if nonull. */
4899 /* Forbid global symbols in every non-primary GOT from having
4900 lazy-binding stubs. */
4902 htab_traverse (g->got_entries, mips_elf_forbid_lazy_stubs, info);
4906 got->size = assign * MIPS_ELF_GOT_SIZE (abfd);
4909 for (g = gg->next; g && g->next != gg; g = g->next)
4911 unsigned int save_assign;
4913 /* Assign offsets to global GOT entries and count how many
4914 relocations they need. */
4915 save_assign = g->assigned_low_gotno;
4916 g->assigned_low_gotno = g->local_gotno;
4918 tga.value = MIPS_ELF_GOT_SIZE (abfd);
4920 htab_traverse (g->got_entries, mips_elf_set_global_gotidx, &tga);
4923 BFD_ASSERT (g->assigned_low_gotno == g->local_gotno + g->global_gotno);
4924 g->assigned_low_gotno = save_assign;
4926 if (bfd_link_pic (info))
4928 g->relocs += g->local_gotno - g->assigned_low_gotno;
4929 BFD_ASSERT (g->assigned_low_gotno == g->next->local_gotno
4930 + g->next->global_gotno
4931 + g->next->tls_gotno
4932 + htab->reserved_gotno);
4934 needed_relocs += g->relocs;
4936 needed_relocs += g->relocs;
4939 mips_elf_allocate_dynamic_relocations (dynobj, info,
4946 /* Returns the first relocation of type r_type found, beginning with
4947 RELOCATION. RELEND is one-past-the-end of the relocation table. */
4949 static const Elf_Internal_Rela *
4950 mips_elf_next_relocation (bfd *abfd ATTRIBUTE_UNUSED, unsigned int r_type,
4951 const Elf_Internal_Rela *relocation,
4952 const Elf_Internal_Rela *relend)
4954 unsigned long r_symndx = ELF_R_SYM (abfd, relocation->r_info);
4956 while (relocation < relend)
4958 if (ELF_R_TYPE (abfd, relocation->r_info) == r_type
4959 && ELF_R_SYM (abfd, relocation->r_info) == r_symndx)
4965 /* We didn't find it. */
4969 /* Return whether an input relocation is against a local symbol. */
4972 mips_elf_local_relocation_p (bfd *input_bfd,
4973 const Elf_Internal_Rela *relocation,
4974 asection **local_sections)
4976 unsigned long r_symndx;
4977 Elf_Internal_Shdr *symtab_hdr;
4980 r_symndx = ELF_R_SYM (input_bfd, relocation->r_info);
4981 symtab_hdr = &elf_tdata (input_bfd)->symtab_hdr;
4982 extsymoff = (elf_bad_symtab (input_bfd)) ? 0 : symtab_hdr->sh_info;
4984 if (r_symndx < extsymoff)
4986 if (elf_bad_symtab (input_bfd) && local_sections[r_symndx] != NULL)
4992 /* Sign-extend VALUE, which has the indicated number of BITS. */
4995 _bfd_mips_elf_sign_extend (bfd_vma value, int bits)
4997 if (value & ((bfd_vma) 1 << (bits - 1)))
4998 /* VALUE is negative. */
4999 value |= ((bfd_vma) - 1) << bits;
5004 /* Return non-zero if the indicated VALUE has overflowed the maximum
5005 range expressible by a signed number with the indicated number of
5009 mips_elf_overflow_p (bfd_vma value, int bits)
5011 bfd_signed_vma svalue = (bfd_signed_vma) value;
5013 if (svalue > (1 << (bits - 1)) - 1)
5014 /* The value is too big. */
5016 else if (svalue < -(1 << (bits - 1)))
5017 /* The value is too small. */
5024 /* Calculate the %high function. */
5027 mips_elf_high (bfd_vma value)
5029 return ((value + (bfd_vma) 0x8000) >> 16) & 0xffff;
5032 /* Calculate the %higher function. */
5035 mips_elf_higher (bfd_vma value ATTRIBUTE_UNUSED)
5038 return ((value + (bfd_vma) 0x80008000) >> 32) & 0xffff;
5045 /* Calculate the %highest function. */
5048 mips_elf_highest (bfd_vma value ATTRIBUTE_UNUSED)
5051 return ((value + (((bfd_vma) 0x8000 << 32) | 0x80008000)) >> 48) & 0xffff;
5058 /* Create the .compact_rel section. */
5061 mips_elf_create_compact_rel_section
5062 (bfd *abfd, struct bfd_link_info *info ATTRIBUTE_UNUSED)
5065 register asection *s;
5067 if (bfd_get_linker_section (abfd, ".compact_rel") == NULL)
5069 flags = (SEC_HAS_CONTENTS | SEC_IN_MEMORY | SEC_LINKER_CREATED
5072 s = bfd_make_section_anyway_with_flags (abfd, ".compact_rel", flags);
5074 || ! bfd_set_section_alignment (abfd, s,
5075 MIPS_ELF_LOG_FILE_ALIGN (abfd)))
5078 s->size = sizeof (Elf32_External_compact_rel);
5084 /* Create the .got section to hold the global offset table. */
5087 mips_elf_create_got_section (bfd *abfd, struct bfd_link_info *info)
5090 register asection *s;
5091 struct elf_link_hash_entry *h;
5092 struct bfd_link_hash_entry *bh;
5093 struct mips_elf_link_hash_table *htab;
5095 htab = mips_elf_hash_table (info);
5096 BFD_ASSERT (htab != NULL);
5098 /* This function may be called more than once. */
5102 flags = (SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS | SEC_IN_MEMORY
5103 | SEC_LINKER_CREATED);
5105 /* We have to use an alignment of 2**4 here because this is hardcoded
5106 in the function stub generation and in the linker script. */
5107 s = bfd_make_section_anyway_with_flags (abfd, ".got", flags);
5109 || ! bfd_set_section_alignment (abfd, s, 4))
5113 /* Define the symbol _GLOBAL_OFFSET_TABLE_. We don't do this in the
5114 linker script because we don't want to define the symbol if we
5115 are not creating a global offset table. */
5117 if (! (_bfd_generic_link_add_one_symbol
5118 (info, abfd, "_GLOBAL_OFFSET_TABLE_", BSF_GLOBAL, s,
5119 0, NULL, FALSE, get_elf_backend_data (abfd)->collect, &bh)))
5122 h = (struct elf_link_hash_entry *) bh;
5125 h->type = STT_OBJECT;
5126 h->other = (h->other & ~ELF_ST_VISIBILITY (-1)) | STV_HIDDEN;
5127 elf_hash_table (info)->hgot = h;
5129 if (bfd_link_pic (info)
5130 && ! bfd_elf_link_record_dynamic_symbol (info, h))
5133 htab->got_info = mips_elf_create_got_info (abfd);
5134 mips_elf_section_data (s)->elf.this_hdr.sh_flags
5135 |= SHF_ALLOC | SHF_WRITE | SHF_MIPS_GPREL;
5137 /* We also need a .got.plt section when generating PLTs. */
5138 s = bfd_make_section_anyway_with_flags (abfd, ".got.plt",
5139 SEC_ALLOC | SEC_LOAD
5142 | SEC_LINKER_CREATED);
5150 /* Return true if H refers to the special VxWorks __GOTT_BASE__ or
5151 __GOTT_INDEX__ symbols. These symbols are only special for
5152 shared objects; they are not used in executables. */
5155 is_gott_symbol (struct bfd_link_info *info, struct elf_link_hash_entry *h)
5157 return (mips_elf_hash_table (info)->is_vxworks
5158 && bfd_link_pic (info)
5159 && (strcmp (h->root.root.string, "__GOTT_BASE__") == 0
5160 || strcmp (h->root.root.string, "__GOTT_INDEX__") == 0));
5163 /* Return TRUE if a relocation of type R_TYPE from INPUT_BFD might
5164 require an la25 stub. See also mips_elf_local_pic_function_p,
5165 which determines whether the destination function ever requires a
5169 mips_elf_relocation_needs_la25_stub (bfd *input_bfd, int r_type,
5170 bfd_boolean target_is_16_bit_code_p)
5172 /* We specifically ignore branches and jumps from EF_PIC objects,
5173 where the onus is on the compiler or programmer to perform any
5174 necessary initialization of $25. Sometimes such initialization
5175 is unnecessary; for example, -mno-shared functions do not use
5176 the incoming value of $25, and may therefore be called directly. */
5177 if (PIC_OBJECT_P (input_bfd))
5184 case R_MIPS_PC21_S2:
5185 case R_MIPS_PC26_S2:
5186 case R_MICROMIPS_26_S1:
5187 case R_MICROMIPS_PC7_S1:
5188 case R_MICROMIPS_PC10_S1:
5189 case R_MICROMIPS_PC16_S1:
5190 case R_MICROMIPS_PC23_S2:
5194 return !target_is_16_bit_code_p;
5201 /* Calculate the value produced by the RELOCATION (which comes from
5202 the INPUT_BFD). The ADDEND is the addend to use for this
5203 RELOCATION; RELOCATION->R_ADDEND is ignored.
5205 The result of the relocation calculation is stored in VALUEP.
5206 On exit, set *CROSS_MODE_JUMP_P to true if the relocation field
5207 is a MIPS16 or microMIPS jump to standard MIPS code, or vice versa.
5209 This function returns bfd_reloc_continue if the caller need take no
5210 further action regarding this relocation, bfd_reloc_notsupported if
5211 something goes dramatically wrong, bfd_reloc_overflow if an
5212 overflow occurs, and bfd_reloc_ok to indicate success. */
5214 static bfd_reloc_status_type
5215 mips_elf_calculate_relocation (bfd *abfd, bfd *input_bfd,
5216 asection *input_section,
5217 struct bfd_link_info *info,
5218 const Elf_Internal_Rela *relocation,
5219 bfd_vma addend, reloc_howto_type *howto,
5220 Elf_Internal_Sym *local_syms,
5221 asection **local_sections, bfd_vma *valuep,
5223 bfd_boolean *cross_mode_jump_p,
5224 bfd_boolean save_addend)
5226 /* The eventual value we will return. */
5228 /* The address of the symbol against which the relocation is
5231 /* The final GP value to be used for the relocatable, executable, or
5232 shared object file being produced. */
5234 /* The place (section offset or address) of the storage unit being
5237 /* The value of GP used to create the relocatable object. */
5239 /* The offset into the global offset table at which the address of
5240 the relocation entry symbol, adjusted by the addend, resides
5241 during execution. */
5242 bfd_vma g = MINUS_ONE;
5243 /* The section in which the symbol referenced by the relocation is
5245 asection *sec = NULL;
5246 struct mips_elf_link_hash_entry *h = NULL;
5247 /* TRUE if the symbol referred to by this relocation is a local
5249 bfd_boolean local_p, was_local_p;
5250 /* TRUE if the symbol referred to by this relocation is "_gp_disp". */
5251 bfd_boolean gp_disp_p = FALSE;
5252 /* TRUE if the symbol referred to by this relocation is
5253 "__gnu_local_gp". */
5254 bfd_boolean gnu_local_gp_p = FALSE;
5255 Elf_Internal_Shdr *symtab_hdr;
5257 unsigned long r_symndx;
5259 /* TRUE if overflow occurred during the calculation of the
5260 relocation value. */
5261 bfd_boolean overflowed_p;
5262 /* TRUE if this relocation refers to a MIPS16 function. */
5263 bfd_boolean target_is_16_bit_code_p = FALSE;
5264 bfd_boolean target_is_micromips_code_p = FALSE;
5265 struct mips_elf_link_hash_table *htab;
5268 dynobj = elf_hash_table (info)->dynobj;
5269 htab = mips_elf_hash_table (info);
5270 BFD_ASSERT (htab != NULL);
5272 /* Parse the relocation. */
5273 r_symndx = ELF_R_SYM (input_bfd, relocation->r_info);
5274 r_type = ELF_R_TYPE (input_bfd, relocation->r_info);
5275 p = (input_section->output_section->vma
5276 + input_section->output_offset
5277 + relocation->r_offset);
5279 /* Assume that there will be no overflow. */
5280 overflowed_p = FALSE;
5282 /* Figure out whether or not the symbol is local, and get the offset
5283 used in the array of hash table entries. */
5284 symtab_hdr = &elf_tdata (input_bfd)->symtab_hdr;
5285 local_p = mips_elf_local_relocation_p (input_bfd, relocation,
5287 was_local_p = local_p;
5288 if (! elf_bad_symtab (input_bfd))
5289 extsymoff = symtab_hdr->sh_info;
5292 /* The symbol table does not follow the rule that local symbols
5293 must come before globals. */
5297 /* Figure out the value of the symbol. */
5300 Elf_Internal_Sym *sym;
5302 sym = local_syms + r_symndx;
5303 sec = local_sections[r_symndx];
5305 symbol = sec->output_section->vma + sec->output_offset;
5306 if (ELF_ST_TYPE (sym->st_info) != STT_SECTION
5307 || (sec->flags & SEC_MERGE))
5308 symbol += sym->st_value;
5309 if ((sec->flags & SEC_MERGE)
5310 && ELF_ST_TYPE (sym->st_info) == STT_SECTION)
5312 addend = _bfd_elf_rel_local_sym (abfd, sym, &sec, addend);
5314 addend += sec->output_section->vma + sec->output_offset;
5317 /* MIPS16/microMIPS text labels should be treated as odd. */
5318 if (ELF_ST_IS_COMPRESSED (sym->st_other))
5321 /* Record the name of this symbol, for our caller. */
5322 *namep = bfd_elf_string_from_elf_section (input_bfd,
5323 symtab_hdr->sh_link,
5326 *namep = bfd_section_name (input_bfd, sec);
5328 target_is_16_bit_code_p = ELF_ST_IS_MIPS16 (sym->st_other);
5329 target_is_micromips_code_p = ELF_ST_IS_MICROMIPS (sym->st_other);
5333 /* ??? Could we use RELOC_FOR_GLOBAL_SYMBOL here ? */
5335 /* For global symbols we look up the symbol in the hash-table. */
5336 h = ((struct mips_elf_link_hash_entry *)
5337 elf_sym_hashes (input_bfd) [r_symndx - extsymoff]);
5338 /* Find the real hash-table entry for this symbol. */
5339 while (h->root.root.type == bfd_link_hash_indirect
5340 || h->root.root.type == bfd_link_hash_warning)
5341 h = (struct mips_elf_link_hash_entry *) h->root.root.u.i.link;
5343 /* Record the name of this symbol, for our caller. */
5344 *namep = h->root.root.root.string;
5346 /* See if this is the special _gp_disp symbol. Note that such a
5347 symbol must always be a global symbol. */
5348 if (strcmp (*namep, "_gp_disp") == 0
5349 && ! NEWABI_P (input_bfd))
5351 /* Relocations against _gp_disp are permitted only with
5352 R_MIPS_HI16 and R_MIPS_LO16 relocations. */
5353 if (!hi16_reloc_p (r_type) && !lo16_reloc_p (r_type))
5354 return bfd_reloc_notsupported;
5358 /* See if this is the special _gp symbol. Note that such a
5359 symbol must always be a global symbol. */
5360 else if (strcmp (*namep, "__gnu_local_gp") == 0)
5361 gnu_local_gp_p = TRUE;
5364 /* If this symbol is defined, calculate its address. Note that
5365 _gp_disp is a magic symbol, always implicitly defined by the
5366 linker, so it's inappropriate to check to see whether or not
5368 else if ((h->root.root.type == bfd_link_hash_defined
5369 || h->root.root.type == bfd_link_hash_defweak)
5370 && h->root.root.u.def.section)
5372 sec = h->root.root.u.def.section;
5373 if (sec->output_section)
5374 symbol = (h->root.root.u.def.value
5375 + sec->output_section->vma
5376 + sec->output_offset);
5378 symbol = h->root.root.u.def.value;
5380 else if (h->root.root.type == bfd_link_hash_undefweak)
5381 /* We allow relocations against undefined weak symbols, giving
5382 it the value zero, so that you can undefined weak functions
5383 and check to see if they exist by looking at their
5386 else if (info->unresolved_syms_in_objects == RM_IGNORE
5387 && ELF_ST_VISIBILITY (h->root.other) == STV_DEFAULT)
5389 else if (strcmp (*namep, SGI_COMPAT (input_bfd)
5390 ? "_DYNAMIC_LINK" : "_DYNAMIC_LINKING") == 0)
5392 /* If this is a dynamic link, we should have created a
5393 _DYNAMIC_LINK symbol or _DYNAMIC_LINKING(for normal mips) symbol
5394 in in _bfd_mips_elf_create_dynamic_sections.
5395 Otherwise, we should define the symbol with a value of 0.
5396 FIXME: It should probably get into the symbol table
5398 BFD_ASSERT (! bfd_link_pic (info));
5399 BFD_ASSERT (bfd_get_section_by_name (abfd, ".dynamic") == NULL);
5402 else if (ELF_MIPS_IS_OPTIONAL (h->root.other))
5404 /* This is an optional symbol - an Irix specific extension to the
5405 ELF spec. Ignore it for now.
5406 XXX - FIXME - there is more to the spec for OPTIONAL symbols
5407 than simply ignoring them, but we do not handle this for now.
5408 For information see the "64-bit ELF Object File Specification"
5409 which is available from here:
5410 http://techpubs.sgi.com/library/manuals/4000/007-4658-001/pdf/007-4658-001.pdf */
5413 else if ((*info->callbacks->undefined_symbol)
5414 (info, h->root.root.root.string, input_bfd,
5415 input_section, relocation->r_offset,
5416 (info->unresolved_syms_in_objects == RM_GENERATE_ERROR)
5417 || ELF_ST_VISIBILITY (h->root.other)))
5419 return bfd_reloc_undefined;
5423 return bfd_reloc_notsupported;
5426 target_is_16_bit_code_p = ELF_ST_IS_MIPS16 (h->root.other);
5427 target_is_micromips_code_p = ELF_ST_IS_MICROMIPS (h->root.other);
5430 /* If this is a reference to a 16-bit function with a stub, we need
5431 to redirect the relocation to the stub unless:
5433 (a) the relocation is for a MIPS16 JAL;
5435 (b) the relocation is for a MIPS16 PIC call, and there are no
5436 non-MIPS16 uses of the GOT slot; or
5438 (c) the section allows direct references to MIPS16 functions. */
5439 if (r_type != R_MIPS16_26
5440 && !bfd_link_relocatable (info)
5442 && h->fn_stub != NULL
5443 && (r_type != R_MIPS16_CALL16 || h->need_fn_stub))
5445 && mips_elf_tdata (input_bfd)->local_stubs != NULL
5446 && mips_elf_tdata (input_bfd)->local_stubs[r_symndx] != NULL))
5447 && !section_allows_mips16_refs_p (input_section))
5449 /* This is a 32- or 64-bit call to a 16-bit function. We should
5450 have already noticed that we were going to need the
5454 sec = mips_elf_tdata (input_bfd)->local_stubs[r_symndx];
5459 BFD_ASSERT (h->need_fn_stub);
5462 /* If a LA25 header for the stub itself exists, point to the
5463 prepended LUI/ADDIU sequence. */
5464 sec = h->la25_stub->stub_section;
5465 value = h->la25_stub->offset;
5474 symbol = sec->output_section->vma + sec->output_offset + value;
5475 /* The target is 16-bit, but the stub isn't. */
5476 target_is_16_bit_code_p = FALSE;
5478 /* If this is a MIPS16 call with a stub, that is made through the PLT or
5479 to a standard MIPS function, we need to redirect the call to the stub.
5480 Note that we specifically exclude R_MIPS16_CALL16 from this behavior;
5481 indirect calls should use an indirect stub instead. */
5482 else if (r_type == R_MIPS16_26 && !bfd_link_relocatable (info)
5483 && ((h != NULL && (h->call_stub != NULL || h->call_fp_stub != NULL))
5485 && mips_elf_tdata (input_bfd)->local_call_stubs != NULL
5486 && mips_elf_tdata (input_bfd)->local_call_stubs[r_symndx] != NULL))
5487 && ((h != NULL && h->use_plt_entry) || !target_is_16_bit_code_p))
5490 sec = mips_elf_tdata (input_bfd)->local_call_stubs[r_symndx];
5493 /* If both call_stub and call_fp_stub are defined, we can figure
5494 out which one to use by checking which one appears in the input
5496 if (h->call_stub != NULL && h->call_fp_stub != NULL)
5501 for (o = input_bfd->sections; o != NULL; o = o->next)
5503 if (CALL_FP_STUB_P (bfd_get_section_name (input_bfd, o)))
5505 sec = h->call_fp_stub;
5512 else if (h->call_stub != NULL)
5515 sec = h->call_fp_stub;
5518 BFD_ASSERT (sec->size > 0);
5519 symbol = sec->output_section->vma + sec->output_offset;
5521 /* If this is a direct call to a PIC function, redirect to the
5523 else if (h != NULL && h->la25_stub
5524 && mips_elf_relocation_needs_la25_stub (input_bfd, r_type,
5525 target_is_16_bit_code_p))
5526 symbol = (h->la25_stub->stub_section->output_section->vma
5527 + h->la25_stub->stub_section->output_offset
5528 + h->la25_stub->offset);
5529 /* For direct MIPS16 and microMIPS calls make sure the compressed PLT
5530 entry is used if a standard PLT entry has also been made. In this
5531 case the symbol will have been set by mips_elf_set_plt_sym_value
5532 to point to the standard PLT entry, so redirect to the compressed
5534 else if ((r_type == R_MIPS16_26 || r_type == R_MICROMIPS_26_S1)
5535 && !bfd_link_relocatable (info)
5538 && h->root.plt.plist->comp_offset != MINUS_ONE
5539 && h->root.plt.plist->mips_offset != MINUS_ONE)
5541 bfd_boolean micromips_p = MICROMIPS_P (abfd);
5544 symbol = (sec->output_section->vma
5545 + sec->output_offset
5546 + htab->plt_header_size
5547 + htab->plt_mips_offset
5548 + h->root.plt.plist->comp_offset
5551 target_is_16_bit_code_p = !micromips_p;
5552 target_is_micromips_code_p = micromips_p;
5555 /* Make sure MIPS16 and microMIPS are not used together. */
5556 if ((r_type == R_MIPS16_26 && target_is_micromips_code_p)
5557 || (micromips_branch_reloc_p (r_type) && target_is_16_bit_code_p))
5559 (*_bfd_error_handler)
5560 (_("MIPS16 and microMIPS functions cannot call each other"));
5561 return bfd_reloc_notsupported;
5564 /* Calls from 16-bit code to 32-bit code and vice versa require the
5565 mode change. However, we can ignore calls to undefined weak symbols,
5566 which should never be executed at runtime. This exception is important
5567 because the assembly writer may have "known" that any definition of the
5568 symbol would be 16-bit code, and that direct jumps were therefore
5570 *cross_mode_jump_p = (!bfd_link_relocatable (info)
5571 && !(h && h->root.root.type == bfd_link_hash_undefweak)
5572 && ((r_type == R_MIPS16_26 && !target_is_16_bit_code_p)
5573 || (r_type == R_MICROMIPS_26_S1
5574 && !target_is_micromips_code_p)
5575 || ((r_type == R_MIPS_26 || r_type == R_MIPS_JALR)
5576 && (target_is_16_bit_code_p
5577 || target_is_micromips_code_p))));
5579 local_p = (h == NULL || mips_use_local_got_p (info, h));
5581 gp0 = _bfd_get_gp_value (input_bfd);
5582 gp = _bfd_get_gp_value (abfd);
5584 gp += mips_elf_adjust_gp (abfd, htab->got_info, input_bfd);
5589 /* Global R_MIPS_GOT_PAGE/R_MICROMIPS_GOT_PAGE relocations are equivalent
5590 to R_MIPS_GOT_DISP/R_MICROMIPS_GOT_DISP. The addend is applied by the
5591 corresponding R_MIPS_GOT_OFST/R_MICROMIPS_GOT_OFST. */
5592 if (got_page_reloc_p (r_type) && !local_p)
5594 r_type = (micromips_reloc_p (r_type)
5595 ? R_MICROMIPS_GOT_DISP : R_MIPS_GOT_DISP);
5599 /* If we haven't already determined the GOT offset, and we're going
5600 to need it, get it now. */
5603 case R_MIPS16_CALL16:
5604 case R_MIPS16_GOT16:
5607 case R_MIPS_GOT_DISP:
5608 case R_MIPS_GOT_HI16:
5609 case R_MIPS_CALL_HI16:
5610 case R_MIPS_GOT_LO16:
5611 case R_MIPS_CALL_LO16:
5612 case R_MICROMIPS_CALL16:
5613 case R_MICROMIPS_GOT16:
5614 case R_MICROMIPS_GOT_DISP:
5615 case R_MICROMIPS_GOT_HI16:
5616 case R_MICROMIPS_CALL_HI16:
5617 case R_MICROMIPS_GOT_LO16:
5618 case R_MICROMIPS_CALL_LO16:
5620 case R_MIPS_TLS_GOTTPREL:
5621 case R_MIPS_TLS_LDM:
5622 case R_MIPS16_TLS_GD:
5623 case R_MIPS16_TLS_GOTTPREL:
5624 case R_MIPS16_TLS_LDM:
5625 case R_MICROMIPS_TLS_GD:
5626 case R_MICROMIPS_TLS_GOTTPREL:
5627 case R_MICROMIPS_TLS_LDM:
5628 /* Find the index into the GOT where this value is located. */
5629 if (tls_ldm_reloc_p (r_type))
5631 g = mips_elf_local_got_index (abfd, input_bfd, info,
5632 0, 0, NULL, r_type);
5634 return bfd_reloc_outofrange;
5638 /* On VxWorks, CALL relocations should refer to the .got.plt
5639 entry, which is initialized to point at the PLT stub. */
5640 if (htab->is_vxworks
5641 && (call_hi16_reloc_p (r_type)
5642 || call_lo16_reloc_p (r_type)
5643 || call16_reloc_p (r_type)))
5645 BFD_ASSERT (addend == 0);
5646 BFD_ASSERT (h->root.needs_plt);
5647 g = mips_elf_gotplt_index (info, &h->root);
5651 BFD_ASSERT (addend == 0);
5652 g = mips_elf_global_got_index (abfd, info, input_bfd,
5654 if (!TLS_RELOC_P (r_type)
5655 && !elf_hash_table (info)->dynamic_sections_created)
5656 /* This is a static link. We must initialize the GOT entry. */
5657 MIPS_ELF_PUT_WORD (dynobj, symbol, htab->sgot->contents + g);
5660 else if (!htab->is_vxworks
5661 && (call16_reloc_p (r_type) || got16_reloc_p (r_type)))
5662 /* The calculation below does not involve "g". */
5666 g = mips_elf_local_got_index (abfd, input_bfd, info,
5667 symbol + addend, r_symndx, h, r_type);
5669 return bfd_reloc_outofrange;
5672 /* Convert GOT indices to actual offsets. */
5673 g = mips_elf_got_offset_from_index (info, abfd, input_bfd, g);
5677 /* Relocations against the VxWorks __GOTT_BASE__ and __GOTT_INDEX__
5678 symbols are resolved by the loader. Add them to .rela.dyn. */
5679 if (h != NULL && is_gott_symbol (info, &h->root))
5681 Elf_Internal_Rela outrel;
5685 s = mips_elf_rel_dyn_section (info, FALSE);
5686 loc = s->contents + s->reloc_count++ * sizeof (Elf32_External_Rela);
5688 outrel.r_offset = (input_section->output_section->vma
5689 + input_section->output_offset
5690 + relocation->r_offset);
5691 outrel.r_info = ELF32_R_INFO (h->root.dynindx, r_type);
5692 outrel.r_addend = addend;
5693 bfd_elf32_swap_reloca_out (abfd, &outrel, loc);
5695 /* If we've written this relocation for a readonly section,
5696 we need to set DF_TEXTREL again, so that we do not delete the
5698 if (MIPS_ELF_READONLY_SECTION (input_section))
5699 info->flags |= DF_TEXTREL;
5702 return bfd_reloc_ok;
5705 /* Figure out what kind of relocation is being performed. */
5709 return bfd_reloc_continue;
5712 if (howto->partial_inplace)
5713 addend = _bfd_mips_elf_sign_extend (addend, 16);
5714 value = symbol + addend;
5715 overflowed_p = mips_elf_overflow_p (value, 16);
5721 if ((bfd_link_pic (info)
5722 || (htab->root.dynamic_sections_created
5724 && h->root.def_dynamic
5725 && !h->root.def_regular
5726 && !h->has_static_relocs))
5727 && r_symndx != STN_UNDEF
5729 || h->root.root.type != bfd_link_hash_undefweak
5730 || ELF_ST_VISIBILITY (h->root.other) == STV_DEFAULT)
5731 && (input_section->flags & SEC_ALLOC) != 0)
5733 /* If we're creating a shared library, then we can't know
5734 where the symbol will end up. So, we create a relocation
5735 record in the output, and leave the job up to the dynamic
5736 linker. We must do the same for executable references to
5737 shared library symbols, unless we've decided to use copy
5738 relocs or PLTs instead. */
5740 if (!mips_elf_create_dynamic_relocation (abfd,
5748 return bfd_reloc_undefined;
5752 if (r_type != R_MIPS_REL32)
5753 value = symbol + addend;
5757 value &= howto->dst_mask;
5761 value = symbol + addend - p;
5762 value &= howto->dst_mask;
5766 /* The calculation for R_MIPS16_26 is just the same as for an
5767 R_MIPS_26. It's only the storage of the relocated field into
5768 the output file that's different. That's handled in
5769 mips_elf_perform_relocation. So, we just fall through to the
5770 R_MIPS_26 case here. */
5772 case R_MICROMIPS_26_S1:
5776 /* Make sure the target of JALX is word-aligned. Bit 0 must be
5777 the correct ISA mode selector and bit 1 must be 0. */
5778 if (*cross_mode_jump_p && (symbol & 3) != (r_type == R_MIPS_26))
5779 return bfd_reloc_outofrange;
5781 /* Shift is 2, unusually, for microMIPS JALX. */
5782 shift = (!*cross_mode_jump_p && r_type == R_MICROMIPS_26_S1) ? 1 : 2;
5785 value = addend | ((p + 4) & (0xfc000000 << shift));
5786 else if (howto->partial_inplace)
5787 value = _bfd_mips_elf_sign_extend (addend, 26 + shift);
5790 value = (value + symbol) >> shift;
5791 if (!was_local_p && h->root.root.type != bfd_link_hash_undefweak)
5792 overflowed_p = (value >> 26) != ((p + 4) >> (26 + shift));
5793 value &= howto->dst_mask;
5797 case R_MIPS_TLS_DTPREL_HI16:
5798 case R_MIPS16_TLS_DTPREL_HI16:
5799 case R_MICROMIPS_TLS_DTPREL_HI16:
5800 value = (mips_elf_high (addend + symbol - dtprel_base (info))
5804 case R_MIPS_TLS_DTPREL_LO16:
5805 case R_MIPS_TLS_DTPREL32:
5806 case R_MIPS_TLS_DTPREL64:
5807 case R_MIPS16_TLS_DTPREL_LO16:
5808 case R_MICROMIPS_TLS_DTPREL_LO16:
5809 value = (symbol + addend - dtprel_base (info)) & howto->dst_mask;
5812 case R_MIPS_TLS_TPREL_HI16:
5813 case R_MIPS16_TLS_TPREL_HI16:
5814 case R_MICROMIPS_TLS_TPREL_HI16:
5815 value = (mips_elf_high (addend + symbol - tprel_base (info))
5819 case R_MIPS_TLS_TPREL_LO16:
5820 case R_MIPS_TLS_TPREL32:
5821 case R_MIPS_TLS_TPREL64:
5822 case R_MIPS16_TLS_TPREL_LO16:
5823 case R_MICROMIPS_TLS_TPREL_LO16:
5824 value = (symbol + addend - tprel_base (info)) & howto->dst_mask;
5829 case R_MICROMIPS_HI16:
5832 value = mips_elf_high (addend + symbol);
5833 value &= howto->dst_mask;
5837 /* For MIPS16 ABI code we generate this sequence
5838 0: li $v0,%hi(_gp_disp)
5839 4: addiupc $v1,%lo(_gp_disp)
5843 So the offsets of hi and lo relocs are the same, but the
5844 base $pc is that used by the ADDIUPC instruction at $t9 + 4.
5845 ADDIUPC clears the low two bits of the instruction address,
5846 so the base is ($t9 + 4) & ~3. */
5847 if (r_type == R_MIPS16_HI16)
5848 value = mips_elf_high (addend + gp - ((p + 4) & ~(bfd_vma) 0x3));
5849 /* The microMIPS .cpload sequence uses the same assembly
5850 instructions as the traditional psABI version, but the
5851 incoming $t9 has the low bit set. */
5852 else if (r_type == R_MICROMIPS_HI16)
5853 value = mips_elf_high (addend + gp - p - 1);
5855 value = mips_elf_high (addend + gp - p);
5856 overflowed_p = mips_elf_overflow_p (value, 16);
5862 case R_MICROMIPS_LO16:
5863 case R_MICROMIPS_HI0_LO16:
5865 value = (symbol + addend) & howto->dst_mask;
5868 /* See the comment for R_MIPS16_HI16 above for the reason
5869 for this conditional. */
5870 if (r_type == R_MIPS16_LO16)
5871 value = addend + gp - (p & ~(bfd_vma) 0x3);
5872 else if (r_type == R_MICROMIPS_LO16
5873 || r_type == R_MICROMIPS_HI0_LO16)
5874 value = addend + gp - p + 3;
5876 value = addend + gp - p + 4;
5877 /* The MIPS ABI requires checking the R_MIPS_LO16 relocation
5878 for overflow. But, on, say, IRIX5, relocations against
5879 _gp_disp are normally generated from the .cpload
5880 pseudo-op. It generates code that normally looks like
5883 lui $gp,%hi(_gp_disp)
5884 addiu $gp,$gp,%lo(_gp_disp)
5887 Here $t9 holds the address of the function being called,
5888 as required by the MIPS ELF ABI. The R_MIPS_LO16
5889 relocation can easily overflow in this situation, but the
5890 R_MIPS_HI16 relocation will handle the overflow.
5891 Therefore, we consider this a bug in the MIPS ABI, and do
5892 not check for overflow here. */
5896 case R_MIPS_LITERAL:
5897 case R_MICROMIPS_LITERAL:
5898 /* Because we don't merge literal sections, we can handle this
5899 just like R_MIPS_GPREL16. In the long run, we should merge
5900 shared literals, and then we will need to additional work
5905 case R_MIPS16_GPREL:
5906 /* The R_MIPS16_GPREL performs the same calculation as
5907 R_MIPS_GPREL16, but stores the relocated bits in a different
5908 order. We don't need to do anything special here; the
5909 differences are handled in mips_elf_perform_relocation. */
5910 case R_MIPS_GPREL16:
5911 case R_MICROMIPS_GPREL7_S2:
5912 case R_MICROMIPS_GPREL16:
5913 /* Only sign-extend the addend if it was extracted from the
5914 instruction. If the addend was separate, leave it alone,
5915 otherwise we may lose significant bits. */
5916 if (howto->partial_inplace)
5917 addend = _bfd_mips_elf_sign_extend (addend, 16);
5918 value = symbol + addend - gp;
5919 /* If the symbol was local, any earlier relocatable links will
5920 have adjusted its addend with the gp offset, so compensate
5921 for that now. Don't do it for symbols forced local in this
5922 link, though, since they won't have had the gp offset applied
5926 if (was_local_p || h->root.root.type != bfd_link_hash_undefweak)
5927 overflowed_p = mips_elf_overflow_p (value, 16);
5930 case R_MIPS16_GOT16:
5931 case R_MIPS16_CALL16:
5934 case R_MICROMIPS_GOT16:
5935 case R_MICROMIPS_CALL16:
5936 /* VxWorks does not have separate local and global semantics for
5937 R_MIPS*_GOT16; every relocation evaluates to "G". */
5938 if (!htab->is_vxworks && local_p)
5940 value = mips_elf_got16_entry (abfd, input_bfd, info,
5941 symbol + addend, !was_local_p);
5942 if (value == MINUS_ONE)
5943 return bfd_reloc_outofrange;
5945 = mips_elf_got_offset_from_index (info, abfd, input_bfd, value);
5946 overflowed_p = mips_elf_overflow_p (value, 16);
5953 case R_MIPS_TLS_GOTTPREL:
5954 case R_MIPS_TLS_LDM:
5955 case R_MIPS_GOT_DISP:
5956 case R_MIPS16_TLS_GD:
5957 case R_MIPS16_TLS_GOTTPREL:
5958 case R_MIPS16_TLS_LDM:
5959 case R_MICROMIPS_TLS_GD:
5960 case R_MICROMIPS_TLS_GOTTPREL:
5961 case R_MICROMIPS_TLS_LDM:
5962 case R_MICROMIPS_GOT_DISP:
5964 overflowed_p = mips_elf_overflow_p (value, 16);
5967 case R_MIPS_GPREL32:
5968 value = (addend + symbol + gp0 - gp);
5970 value &= howto->dst_mask;
5974 case R_MIPS_GNU_REL16_S2:
5975 if (howto->partial_inplace)
5976 addend = _bfd_mips_elf_sign_extend (addend, 18);
5978 if ((symbol + addend) & 3)
5979 return bfd_reloc_outofrange;
5981 value = symbol + addend - p;
5982 if (was_local_p || h->root.root.type != bfd_link_hash_undefweak)
5983 overflowed_p = mips_elf_overflow_p (value, 18);
5984 value >>= howto->rightshift;
5985 value &= howto->dst_mask;
5988 case R_MIPS_PC21_S2:
5989 if (howto->partial_inplace)
5990 addend = _bfd_mips_elf_sign_extend (addend, 23);
5992 if ((symbol + addend) & 3)
5993 return bfd_reloc_outofrange;
5995 value = symbol + addend - p;
5996 if (was_local_p || h->root.root.type != bfd_link_hash_undefweak)
5997 overflowed_p = mips_elf_overflow_p (value, 23);
5998 value >>= howto->rightshift;
5999 value &= howto->dst_mask;
6002 case R_MIPS_PC26_S2:
6003 if (howto->partial_inplace)
6004 addend = _bfd_mips_elf_sign_extend (addend, 28);
6006 if ((symbol + addend) & 3)
6007 return bfd_reloc_outofrange;
6009 value = symbol + addend - p;
6010 if (was_local_p || h->root.root.type != bfd_link_hash_undefweak)
6011 overflowed_p = mips_elf_overflow_p (value, 28);
6012 value >>= howto->rightshift;
6013 value &= howto->dst_mask;
6016 case R_MIPS_PC18_S3:
6017 if (howto->partial_inplace)
6018 addend = _bfd_mips_elf_sign_extend (addend, 21);
6020 if ((symbol + addend) & 7)
6021 return bfd_reloc_outofrange;
6023 value = symbol + addend - ((p | 7) ^ 7);
6024 if (was_local_p || h->root.root.type != bfd_link_hash_undefweak)
6025 overflowed_p = mips_elf_overflow_p (value, 21);
6026 value >>= howto->rightshift;
6027 value &= howto->dst_mask;
6030 case R_MIPS_PC19_S2:
6031 if (howto->partial_inplace)
6032 addend = _bfd_mips_elf_sign_extend (addend, 21);
6034 if ((symbol + addend) & 3)
6035 return bfd_reloc_outofrange;
6037 value = symbol + addend - p;
6038 if (was_local_p || h->root.root.type != bfd_link_hash_undefweak)
6039 overflowed_p = mips_elf_overflow_p (value, 21);
6040 value >>= howto->rightshift;
6041 value &= howto->dst_mask;
6045 value = mips_elf_high (symbol + addend - p);
6046 if (was_local_p || h->root.root.type != bfd_link_hash_undefweak)
6047 overflowed_p = mips_elf_overflow_p (value, 16);
6048 value &= howto->dst_mask;
6052 if (howto->partial_inplace)
6053 addend = _bfd_mips_elf_sign_extend (addend, 16);
6054 value = symbol + addend - p;
6055 value &= howto->dst_mask;
6058 case R_MICROMIPS_PC7_S1:
6059 if (howto->partial_inplace)
6060 addend = _bfd_mips_elf_sign_extend (addend, 8);
6061 value = symbol + addend - p;
6062 if (was_local_p || h->root.root.type != bfd_link_hash_undefweak)
6063 overflowed_p = mips_elf_overflow_p (value, 8);
6064 value >>= howto->rightshift;
6065 value &= howto->dst_mask;
6068 case R_MICROMIPS_PC10_S1:
6069 if (howto->partial_inplace)
6070 addend = _bfd_mips_elf_sign_extend (addend, 11);
6071 value = symbol + addend - p;
6072 if (was_local_p || h->root.root.type != bfd_link_hash_undefweak)
6073 overflowed_p = mips_elf_overflow_p (value, 11);
6074 value >>= howto->rightshift;
6075 value &= howto->dst_mask;
6078 case R_MICROMIPS_PC16_S1:
6079 if (howto->partial_inplace)
6080 addend = _bfd_mips_elf_sign_extend (addend, 17);
6081 value = symbol + addend - p;
6082 if (was_local_p || h->root.root.type != bfd_link_hash_undefweak)
6083 overflowed_p = mips_elf_overflow_p (value, 17);
6084 value >>= howto->rightshift;
6085 value &= howto->dst_mask;
6088 case R_MICROMIPS_PC23_S2:
6089 if (howto->partial_inplace)
6090 addend = _bfd_mips_elf_sign_extend (addend, 25);
6091 value = symbol + addend - ((p | 3) ^ 3);
6092 if (was_local_p || h->root.root.type != bfd_link_hash_undefweak)
6093 overflowed_p = mips_elf_overflow_p (value, 25);
6094 value >>= howto->rightshift;
6095 value &= howto->dst_mask;
6098 case R_MIPS_GOT_HI16:
6099 case R_MIPS_CALL_HI16:
6100 case R_MICROMIPS_GOT_HI16:
6101 case R_MICROMIPS_CALL_HI16:
6102 /* We're allowed to handle these two relocations identically.
6103 The dynamic linker is allowed to handle the CALL relocations
6104 differently by creating a lazy evaluation stub. */
6106 value = mips_elf_high (value);
6107 value &= howto->dst_mask;
6110 case R_MIPS_GOT_LO16:
6111 case R_MIPS_CALL_LO16:
6112 case R_MICROMIPS_GOT_LO16:
6113 case R_MICROMIPS_CALL_LO16:
6114 value = g & howto->dst_mask;
6117 case R_MIPS_GOT_PAGE:
6118 case R_MICROMIPS_GOT_PAGE:
6119 value = mips_elf_got_page (abfd, input_bfd, info, symbol + addend, NULL);
6120 if (value == MINUS_ONE)
6121 return bfd_reloc_outofrange;
6122 value = mips_elf_got_offset_from_index (info, abfd, input_bfd, value);
6123 overflowed_p = mips_elf_overflow_p (value, 16);
6126 case R_MIPS_GOT_OFST:
6127 case R_MICROMIPS_GOT_OFST:
6129 mips_elf_got_page (abfd, input_bfd, info, symbol + addend, &value);
6132 overflowed_p = mips_elf_overflow_p (value, 16);
6136 case R_MICROMIPS_SUB:
6137 value = symbol - addend;
6138 value &= howto->dst_mask;
6142 case R_MICROMIPS_HIGHER:
6143 value = mips_elf_higher (addend + symbol);
6144 value &= howto->dst_mask;
6147 case R_MIPS_HIGHEST:
6148 case R_MICROMIPS_HIGHEST:
6149 value = mips_elf_highest (addend + symbol);
6150 value &= howto->dst_mask;
6153 case R_MIPS_SCN_DISP:
6154 case R_MICROMIPS_SCN_DISP:
6155 value = symbol + addend - sec->output_offset;
6156 value &= howto->dst_mask;
6160 case R_MICROMIPS_JALR:
6161 /* This relocation is only a hint. In some cases, we optimize
6162 it into a bal instruction. But we don't try to optimize
6163 when the symbol does not resolve locally. */
6164 if (h != NULL && !SYMBOL_CALLS_LOCAL (info, &h->root))
6165 return bfd_reloc_continue;
6166 value = symbol + addend;
6170 case R_MIPS_GNU_VTINHERIT:
6171 case R_MIPS_GNU_VTENTRY:
6172 /* We don't do anything with these at present. */
6173 return bfd_reloc_continue;
6176 /* An unrecognized relocation type. */
6177 return bfd_reloc_notsupported;
6180 /* Store the VALUE for our caller. */
6182 return overflowed_p ? bfd_reloc_overflow : bfd_reloc_ok;
6185 /* Obtain the field relocated by RELOCATION. */
6188 mips_elf_obtain_contents (reloc_howto_type *howto,
6189 const Elf_Internal_Rela *relocation,
6190 bfd *input_bfd, bfd_byte *contents)
6193 bfd_byte *location = contents + relocation->r_offset;
6194 unsigned int size = bfd_get_reloc_size (howto);
6196 /* Obtain the bytes. */
6198 x = bfd_get (8 * size, input_bfd, location);
6203 /* It has been determined that the result of the RELOCATION is the
6204 VALUE. Use HOWTO to place VALUE into the output file at the
6205 appropriate position. The SECTION is the section to which the
6207 CROSS_MODE_JUMP_P is true if the relocation field
6208 is a MIPS16 or microMIPS jump to standard MIPS code, or vice versa.
6210 Returns FALSE if anything goes wrong. */
6213 mips_elf_perform_relocation (struct bfd_link_info *info,
6214 reloc_howto_type *howto,
6215 const Elf_Internal_Rela *relocation,
6216 bfd_vma value, bfd *input_bfd,
6217 asection *input_section, bfd_byte *contents,
6218 bfd_boolean cross_mode_jump_p)
6222 int r_type = ELF_R_TYPE (input_bfd, relocation->r_info);
6225 /* Figure out where the relocation is occurring. */
6226 location = contents + relocation->r_offset;
6228 _bfd_mips_elf_reloc_unshuffle (input_bfd, r_type, FALSE, location);
6230 /* Obtain the current value. */
6231 x = mips_elf_obtain_contents (howto, relocation, input_bfd, contents);
6233 /* Clear the field we are setting. */
6234 x &= ~howto->dst_mask;
6236 /* Set the field. */
6237 x |= (value & howto->dst_mask);
6239 /* If required, turn JAL into JALX. */
6240 if (cross_mode_jump_p && jal_reloc_p (r_type))
6243 bfd_vma opcode = x >> 26;
6244 bfd_vma jalx_opcode;
6246 /* Check to see if the opcode is already JAL or JALX. */
6247 if (r_type == R_MIPS16_26)
6249 ok = ((opcode == 0x6) || (opcode == 0x7));
6252 else if (r_type == R_MICROMIPS_26_S1)
6254 ok = ((opcode == 0x3d) || (opcode == 0x3c));
6259 ok = ((opcode == 0x3) || (opcode == 0x1d));
6263 /* If the opcode is not JAL or JALX, there's a problem. We cannot
6264 convert J or JALS to JALX. */
6267 (*_bfd_error_handler)
6268 (_("%B: %A+0x%lx: Unsupported jump between ISA modes; consider recompiling with interlinking enabled."),
6271 (unsigned long) relocation->r_offset);
6272 bfd_set_error (bfd_error_bad_value);
6276 /* Make this the JALX opcode. */
6277 x = (x & ~(0x3f << 26)) | (jalx_opcode << 26);
6280 /* Try converting JAL to BAL and J(AL)R to B(AL), if the target is in
6282 if (!bfd_link_relocatable (info)
6283 && !cross_mode_jump_p
6284 && ((JAL_TO_BAL_P (input_bfd)
6285 && r_type == R_MIPS_26
6286 && (x >> 26) == 0x3) /* jal addr */
6287 || (JALR_TO_BAL_P (input_bfd)
6288 && r_type == R_MIPS_JALR
6289 && x == 0x0320f809) /* jalr t9 */
6290 || (JR_TO_B_P (input_bfd)
6291 && r_type == R_MIPS_JALR
6292 && x == 0x03200008))) /* jr t9 */
6298 addr = (input_section->output_section->vma
6299 + input_section->output_offset
6300 + relocation->r_offset
6302 if (r_type == R_MIPS_26)
6303 dest = (value << 2) | ((addr >> 28) << 28);
6307 if (off <= 0x1ffff && off >= -0x20000)
6309 if (x == 0x03200008) /* jr t9 */
6310 x = 0x10000000 | (((bfd_vma) off >> 2) & 0xffff); /* b addr */
6312 x = 0x04110000 | (((bfd_vma) off >> 2) & 0xffff); /* bal addr */
6316 /* Put the value into the output. */
6317 size = bfd_get_reloc_size (howto);
6319 bfd_put (8 * size, input_bfd, x, location);
6321 _bfd_mips_elf_reloc_shuffle (input_bfd, r_type, !bfd_link_relocatable (info),
6327 /* Create a rel.dyn relocation for the dynamic linker to resolve. REL
6328 is the original relocation, which is now being transformed into a
6329 dynamic relocation. The ADDENDP is adjusted if necessary; the
6330 caller should store the result in place of the original addend. */
6333 mips_elf_create_dynamic_relocation (bfd *output_bfd,
6334 struct bfd_link_info *info,
6335 const Elf_Internal_Rela *rel,
6336 struct mips_elf_link_hash_entry *h,
6337 asection *sec, bfd_vma symbol,
6338 bfd_vma *addendp, asection *input_section)
6340 Elf_Internal_Rela outrel[3];
6345 bfd_boolean defined_p;
6346 struct mips_elf_link_hash_table *htab;
6348 htab = mips_elf_hash_table (info);
6349 BFD_ASSERT (htab != NULL);
6351 r_type = ELF_R_TYPE (output_bfd, rel->r_info);
6352 dynobj = elf_hash_table (info)->dynobj;
6353 sreloc = mips_elf_rel_dyn_section (info, FALSE);
6354 BFD_ASSERT (sreloc != NULL);
6355 BFD_ASSERT (sreloc->contents != NULL);
6356 BFD_ASSERT (sreloc->reloc_count * MIPS_ELF_REL_SIZE (output_bfd)
6359 outrel[0].r_offset =
6360 _bfd_elf_section_offset (output_bfd, info, input_section, rel[0].r_offset);
6361 if (ABI_64_P (output_bfd))
6363 outrel[1].r_offset =
6364 _bfd_elf_section_offset (output_bfd, info, input_section, rel[1].r_offset);
6365 outrel[2].r_offset =
6366 _bfd_elf_section_offset (output_bfd, info, input_section, rel[2].r_offset);
6369 if (outrel[0].r_offset == MINUS_ONE)
6370 /* The relocation field has been deleted. */
6373 if (outrel[0].r_offset == MINUS_TWO)
6375 /* The relocation field has been converted into a relative value of
6376 some sort. Functions like _bfd_elf_write_section_eh_frame expect
6377 the field to be fully relocated, so add in the symbol's value. */
6382 /* We must now calculate the dynamic symbol table index to use
6383 in the relocation. */
6384 if (h != NULL && ! SYMBOL_REFERENCES_LOCAL (info, &h->root))
6386 BFD_ASSERT (htab->is_vxworks || h->global_got_area != GGA_NONE);
6387 indx = h->root.dynindx;
6388 if (SGI_COMPAT (output_bfd))
6389 defined_p = h->root.def_regular;
6391 /* ??? glibc's ld.so just adds the final GOT entry to the
6392 relocation field. It therefore treats relocs against
6393 defined symbols in the same way as relocs against
6394 undefined symbols. */
6399 if (sec != NULL && bfd_is_abs_section (sec))
6401 else if (sec == NULL || sec->owner == NULL)
6403 bfd_set_error (bfd_error_bad_value);
6408 indx = elf_section_data (sec->output_section)->dynindx;
6411 asection *osec = htab->root.text_index_section;
6412 indx = elf_section_data (osec)->dynindx;
6418 /* Instead of generating a relocation using the section
6419 symbol, we may as well make it a fully relative
6420 relocation. We want to avoid generating relocations to
6421 local symbols because we used to generate them
6422 incorrectly, without adding the original symbol value,
6423 which is mandated by the ABI for section symbols. In
6424 order to give dynamic loaders and applications time to
6425 phase out the incorrect use, we refrain from emitting
6426 section-relative relocations. It's not like they're
6427 useful, after all. This should be a bit more efficient
6429 /* ??? Although this behavior is compatible with glibc's ld.so,
6430 the ABI says that relocations against STN_UNDEF should have
6431 a symbol value of 0. Irix rld honors this, so relocations
6432 against STN_UNDEF have no effect. */
6433 if (!SGI_COMPAT (output_bfd))
6438 /* If the relocation was previously an absolute relocation and
6439 this symbol will not be referred to by the relocation, we must
6440 adjust it by the value we give it in the dynamic symbol table.
6441 Otherwise leave the job up to the dynamic linker. */
6442 if (defined_p && r_type != R_MIPS_REL32)
6445 if (htab->is_vxworks)
6446 /* VxWorks uses non-relative relocations for this. */
6447 outrel[0].r_info = ELF32_R_INFO (indx, R_MIPS_32);
6449 /* The relocation is always an REL32 relocation because we don't
6450 know where the shared library will wind up at load-time. */
6451 outrel[0].r_info = ELF_R_INFO (output_bfd, (unsigned long) indx,
6454 /* For strict adherence to the ABI specification, we should
6455 generate a R_MIPS_64 relocation record by itself before the
6456 _REL32/_64 record as well, such that the addend is read in as
6457 a 64-bit value (REL32 is a 32-bit relocation, after all).
6458 However, since none of the existing ELF64 MIPS dynamic
6459 loaders seems to care, we don't waste space with these
6460 artificial relocations. If this turns out to not be true,
6461 mips_elf_allocate_dynamic_relocation() should be tweaked so
6462 as to make room for a pair of dynamic relocations per
6463 invocation if ABI_64_P, and here we should generate an
6464 additional relocation record with R_MIPS_64 by itself for a
6465 NULL symbol before this relocation record. */
6466 outrel[1].r_info = ELF_R_INFO (output_bfd, 0,
6467 ABI_64_P (output_bfd)
6470 outrel[2].r_info = ELF_R_INFO (output_bfd, 0, R_MIPS_NONE);
6472 /* Adjust the output offset of the relocation to reference the
6473 correct location in the output file. */
6474 outrel[0].r_offset += (input_section->output_section->vma
6475 + input_section->output_offset);
6476 outrel[1].r_offset += (input_section->output_section->vma
6477 + input_section->output_offset);
6478 outrel[2].r_offset += (input_section->output_section->vma
6479 + input_section->output_offset);
6481 /* Put the relocation back out. We have to use the special
6482 relocation outputter in the 64-bit case since the 64-bit
6483 relocation format is non-standard. */
6484 if (ABI_64_P (output_bfd))
6486 (*get_elf_backend_data (output_bfd)->s->swap_reloc_out)
6487 (output_bfd, &outrel[0],
6489 + sreloc->reloc_count * sizeof (Elf64_Mips_External_Rel)));
6491 else if (htab->is_vxworks)
6493 /* VxWorks uses RELA rather than REL dynamic relocations. */
6494 outrel[0].r_addend = *addendp;
6495 bfd_elf32_swap_reloca_out
6496 (output_bfd, &outrel[0],
6498 + sreloc->reloc_count * sizeof (Elf32_External_Rela)));
6501 bfd_elf32_swap_reloc_out
6502 (output_bfd, &outrel[0],
6503 (sreloc->contents + sreloc->reloc_count * sizeof (Elf32_External_Rel)));
6505 /* We've now added another relocation. */
6506 ++sreloc->reloc_count;
6508 /* Make sure the output section is writable. The dynamic linker
6509 will be writing to it. */
6510 elf_section_data (input_section->output_section)->this_hdr.sh_flags
6513 /* On IRIX5, make an entry of compact relocation info. */
6514 if (IRIX_COMPAT (output_bfd) == ict_irix5)
6516 asection *scpt = bfd_get_linker_section (dynobj, ".compact_rel");
6521 Elf32_crinfo cptrel;
6523 mips_elf_set_cr_format (cptrel, CRF_MIPS_LONG);
6524 cptrel.vaddr = (rel->r_offset
6525 + input_section->output_section->vma
6526 + input_section->output_offset);
6527 if (r_type == R_MIPS_REL32)
6528 mips_elf_set_cr_type (cptrel, CRT_MIPS_REL32);
6530 mips_elf_set_cr_type (cptrel, CRT_MIPS_WORD);
6531 mips_elf_set_cr_dist2to (cptrel, 0);
6532 cptrel.konst = *addendp;
6534 cr = (scpt->contents
6535 + sizeof (Elf32_External_compact_rel));
6536 mips_elf_set_cr_relvaddr (cptrel, 0);
6537 bfd_elf32_swap_crinfo_out (output_bfd, &cptrel,
6538 ((Elf32_External_crinfo *) cr
6539 + scpt->reloc_count));
6540 ++scpt->reloc_count;
6544 /* If we've written this relocation for a readonly section,
6545 we need to set DF_TEXTREL again, so that we do not delete the
6547 if (MIPS_ELF_READONLY_SECTION (input_section))
6548 info->flags |= DF_TEXTREL;
6553 /* Return the MACH for a MIPS e_flags value. */
6556 _bfd_elf_mips_mach (flagword flags)
6558 switch (flags & EF_MIPS_MACH)
6560 case E_MIPS_MACH_3900:
6561 return bfd_mach_mips3900;
6563 case E_MIPS_MACH_4010:
6564 return bfd_mach_mips4010;
6566 case E_MIPS_MACH_4100:
6567 return bfd_mach_mips4100;
6569 case E_MIPS_MACH_4111:
6570 return bfd_mach_mips4111;
6572 case E_MIPS_MACH_4120:
6573 return bfd_mach_mips4120;
6575 case E_MIPS_MACH_4650:
6576 return bfd_mach_mips4650;
6578 case E_MIPS_MACH_5400:
6579 return bfd_mach_mips5400;
6581 case E_MIPS_MACH_5500:
6582 return bfd_mach_mips5500;
6584 case E_MIPS_MACH_5900:
6585 return bfd_mach_mips5900;
6587 case E_MIPS_MACH_9000:
6588 return bfd_mach_mips9000;
6590 case E_MIPS_MACH_SB1:
6591 return bfd_mach_mips_sb1;
6593 case E_MIPS_MACH_LS2E:
6594 return bfd_mach_mips_loongson_2e;
6596 case E_MIPS_MACH_LS2F:
6597 return bfd_mach_mips_loongson_2f;
6599 case E_MIPS_MACH_LS3A:
6600 return bfd_mach_mips_loongson_3a;
6602 case E_MIPS_MACH_OCTEON3:
6603 return bfd_mach_mips_octeon3;
6605 case E_MIPS_MACH_OCTEON2:
6606 return bfd_mach_mips_octeon2;
6608 case E_MIPS_MACH_OCTEON:
6609 return bfd_mach_mips_octeon;
6611 case E_MIPS_MACH_XLR:
6612 return bfd_mach_mips_xlr;
6615 switch (flags & EF_MIPS_ARCH)
6619 return bfd_mach_mips3000;
6622 return bfd_mach_mips6000;
6625 return bfd_mach_mips4000;
6628 return bfd_mach_mips8000;
6631 return bfd_mach_mips5;
6633 case E_MIPS_ARCH_32:
6634 return bfd_mach_mipsisa32;
6636 case E_MIPS_ARCH_64:
6637 return bfd_mach_mipsisa64;
6639 case E_MIPS_ARCH_32R2:
6640 return bfd_mach_mipsisa32r2;
6642 case E_MIPS_ARCH_64R2:
6643 return bfd_mach_mipsisa64r2;
6645 case E_MIPS_ARCH_32R6:
6646 return bfd_mach_mipsisa32r6;
6648 case E_MIPS_ARCH_64R6:
6649 return bfd_mach_mipsisa64r6;
6656 /* Return printable name for ABI. */
6658 static INLINE char *
6659 elf_mips_abi_name (bfd *abfd)
6663 flags = elf_elfheader (abfd)->e_flags;
6664 switch (flags & EF_MIPS_ABI)
6667 if (ABI_N32_P (abfd))
6669 else if (ABI_64_P (abfd))
6673 case E_MIPS_ABI_O32:
6675 case E_MIPS_ABI_O64:
6677 case E_MIPS_ABI_EABI32:
6679 case E_MIPS_ABI_EABI64:
6682 return "unknown abi";
6686 /* MIPS ELF uses two common sections. One is the usual one, and the
6687 other is for small objects. All the small objects are kept
6688 together, and then referenced via the gp pointer, which yields
6689 faster assembler code. This is what we use for the small common
6690 section. This approach is copied from ecoff.c. */
6691 static asection mips_elf_scom_section;
6692 static asymbol mips_elf_scom_symbol;
6693 static asymbol *mips_elf_scom_symbol_ptr;
6695 /* MIPS ELF also uses an acommon section, which represents an
6696 allocated common symbol which may be overridden by a
6697 definition in a shared library. */
6698 static asection mips_elf_acom_section;
6699 static asymbol mips_elf_acom_symbol;
6700 static asymbol *mips_elf_acom_symbol_ptr;
6702 /* This is used for both the 32-bit and the 64-bit ABI. */
6705 _bfd_mips_elf_symbol_processing (bfd *abfd, asymbol *asym)
6707 elf_symbol_type *elfsym;
6709 /* Handle the special MIPS section numbers that a symbol may use. */
6710 elfsym = (elf_symbol_type *) asym;
6711 switch (elfsym->internal_elf_sym.st_shndx)
6713 case SHN_MIPS_ACOMMON:
6714 /* This section is used in a dynamically linked executable file.
6715 It is an allocated common section. The dynamic linker can
6716 either resolve these symbols to something in a shared
6717 library, or it can just leave them here. For our purposes,
6718 we can consider these symbols to be in a new section. */
6719 if (mips_elf_acom_section.name == NULL)
6721 /* Initialize the acommon section. */
6722 mips_elf_acom_section.name = ".acommon";
6723 mips_elf_acom_section.flags = SEC_ALLOC;
6724 mips_elf_acom_section.output_section = &mips_elf_acom_section;
6725 mips_elf_acom_section.symbol = &mips_elf_acom_symbol;
6726 mips_elf_acom_section.symbol_ptr_ptr = &mips_elf_acom_symbol_ptr;
6727 mips_elf_acom_symbol.name = ".acommon";
6728 mips_elf_acom_symbol.flags = BSF_SECTION_SYM;
6729 mips_elf_acom_symbol.section = &mips_elf_acom_section;
6730 mips_elf_acom_symbol_ptr = &mips_elf_acom_symbol;
6732 asym->section = &mips_elf_acom_section;
6736 /* Common symbols less than the GP size are automatically
6737 treated as SHN_MIPS_SCOMMON symbols on IRIX5. */
6738 if (asym->value > elf_gp_size (abfd)
6739 || ELF_ST_TYPE (elfsym->internal_elf_sym.st_info) == STT_TLS
6740 || IRIX_COMPAT (abfd) == ict_irix6)
6743 case SHN_MIPS_SCOMMON:
6744 if (mips_elf_scom_section.name == NULL)
6746 /* Initialize the small common section. */
6747 mips_elf_scom_section.name = ".scommon";
6748 mips_elf_scom_section.flags = SEC_IS_COMMON;
6749 mips_elf_scom_section.output_section = &mips_elf_scom_section;
6750 mips_elf_scom_section.symbol = &mips_elf_scom_symbol;
6751 mips_elf_scom_section.symbol_ptr_ptr = &mips_elf_scom_symbol_ptr;
6752 mips_elf_scom_symbol.name = ".scommon";
6753 mips_elf_scom_symbol.flags = BSF_SECTION_SYM;
6754 mips_elf_scom_symbol.section = &mips_elf_scom_section;
6755 mips_elf_scom_symbol_ptr = &mips_elf_scom_symbol;
6757 asym->section = &mips_elf_scom_section;
6758 asym->value = elfsym->internal_elf_sym.st_size;
6761 case SHN_MIPS_SUNDEFINED:
6762 asym->section = bfd_und_section_ptr;
6767 asection *section = bfd_get_section_by_name (abfd, ".text");
6769 if (section != NULL)
6771 asym->section = section;
6772 /* MIPS_TEXT is a bit special, the address is not an offset
6773 to the base of the .text section. So substract the section
6774 base address to make it an offset. */
6775 asym->value -= section->vma;
6782 asection *section = bfd_get_section_by_name (abfd, ".data");
6784 if (section != NULL)
6786 asym->section = section;
6787 /* MIPS_DATA is a bit special, the address is not an offset
6788 to the base of the .data section. So substract the section
6789 base address to make it an offset. */
6790 asym->value -= section->vma;
6796 /* If this is an odd-valued function symbol, assume it's a MIPS16
6797 or microMIPS one. */
6798 if (ELF_ST_TYPE (elfsym->internal_elf_sym.st_info) == STT_FUNC
6799 && (asym->value & 1) != 0)
6802 if (MICROMIPS_P (abfd))
6803 elfsym->internal_elf_sym.st_other
6804 = ELF_ST_SET_MICROMIPS (elfsym->internal_elf_sym.st_other);
6806 elfsym->internal_elf_sym.st_other
6807 = ELF_ST_SET_MIPS16 (elfsym->internal_elf_sym.st_other);
6811 /* Implement elf_backend_eh_frame_address_size. This differs from
6812 the default in the way it handles EABI64.
6814 EABI64 was originally specified as an LP64 ABI, and that is what
6815 -mabi=eabi normally gives on a 64-bit target. However, gcc has
6816 historically accepted the combination of -mabi=eabi and -mlong32,
6817 and this ILP32 variation has become semi-official over time.
6818 Both forms use elf32 and have pointer-sized FDE addresses.
6820 If an EABI object was generated by GCC 4.0 or above, it will have
6821 an empty .gcc_compiled_longXX section, where XX is the size of longs
6822 in bits. Unfortunately, ILP32 objects generated by earlier compilers
6823 have no special marking to distinguish them from LP64 objects.
6825 We don't want users of the official LP64 ABI to be punished for the
6826 existence of the ILP32 variant, but at the same time, we don't want
6827 to mistakenly interpret pre-4.0 ILP32 objects as being LP64 objects.
6828 We therefore take the following approach:
6830 - If ABFD contains a .gcc_compiled_longXX section, use it to
6831 determine the pointer size.
6833 - Otherwise check the type of the first relocation. Assume that
6834 the LP64 ABI is being used if the relocation is of type R_MIPS_64.
6838 The second check is enough to detect LP64 objects generated by pre-4.0
6839 compilers because, in the kind of output generated by those compilers,
6840 the first relocation will be associated with either a CIE personality
6841 routine or an FDE start address. Furthermore, the compilers never
6842 used a special (non-pointer) encoding for this ABI.
6844 Checking the relocation type should also be safe because there is no
6845 reason to use R_MIPS_64 in an ILP32 object. Pre-4.0 compilers never
6849 _bfd_mips_elf_eh_frame_address_size (bfd *abfd, asection *sec)
6851 if (elf_elfheader (abfd)->e_ident[EI_CLASS] == ELFCLASS64)
6853 if ((elf_elfheader (abfd)->e_flags & EF_MIPS_ABI) == E_MIPS_ABI_EABI64)
6855 bfd_boolean long32_p, long64_p;
6857 long32_p = bfd_get_section_by_name (abfd, ".gcc_compiled_long32") != 0;
6858 long64_p = bfd_get_section_by_name (abfd, ".gcc_compiled_long64") != 0;
6859 if (long32_p && long64_p)
6866 if (sec->reloc_count > 0
6867 && elf_section_data (sec)->relocs != NULL
6868 && (ELF32_R_TYPE (elf_section_data (sec)->relocs[0].r_info)
6877 /* There appears to be a bug in the MIPSpro linker that causes GOT_DISP
6878 relocations against two unnamed section symbols to resolve to the
6879 same address. For example, if we have code like:
6881 lw $4,%got_disp(.data)($gp)
6882 lw $25,%got_disp(.text)($gp)
6885 then the linker will resolve both relocations to .data and the program
6886 will jump there rather than to .text.
6888 We can work around this problem by giving names to local section symbols.
6889 This is also what the MIPSpro tools do. */
6892 _bfd_mips_elf_name_local_section_symbols (bfd *abfd)
6894 return SGI_COMPAT (abfd);
6897 /* Work over a section just before writing it out. This routine is
6898 used by both the 32-bit and the 64-bit ABI. FIXME: We recognize
6899 sections that need the SHF_MIPS_GPREL flag by name; there has to be
6903 _bfd_mips_elf_section_processing (bfd *abfd, Elf_Internal_Shdr *hdr)
6905 if (hdr->sh_type == SHT_MIPS_REGINFO
6906 && hdr->sh_size > 0)
6910 BFD_ASSERT (hdr->sh_size == sizeof (Elf32_External_RegInfo));
6911 BFD_ASSERT (hdr->contents == NULL);
6914 hdr->sh_offset + sizeof (Elf32_External_RegInfo) - 4,
6917 H_PUT_32 (abfd, elf_gp (abfd), buf);
6918 if (bfd_bwrite (buf, 4, abfd) != 4)
6922 if (hdr->sh_type == SHT_MIPS_OPTIONS
6923 && hdr->bfd_section != NULL
6924 && mips_elf_section_data (hdr->bfd_section) != NULL
6925 && mips_elf_section_data (hdr->bfd_section)->u.tdata != NULL)
6927 bfd_byte *contents, *l, *lend;
6929 /* We stored the section contents in the tdata field in the
6930 set_section_contents routine. We save the section contents
6931 so that we don't have to read them again.
6932 At this point we know that elf_gp is set, so we can look
6933 through the section contents to see if there is an
6934 ODK_REGINFO structure. */
6936 contents = mips_elf_section_data (hdr->bfd_section)->u.tdata;
6938 lend = contents + hdr->sh_size;
6939 while (l + sizeof (Elf_External_Options) <= lend)
6941 Elf_Internal_Options intopt;
6943 bfd_mips_elf_swap_options_in (abfd, (Elf_External_Options *) l,
6945 if (intopt.size < sizeof (Elf_External_Options))
6947 (*_bfd_error_handler)
6948 (_("%B: Warning: bad `%s' option size %u smaller than its header"),
6949 abfd, MIPS_ELF_OPTIONS_SECTION_NAME (abfd), intopt.size);
6952 if (ABI_64_P (abfd) && intopt.kind == ODK_REGINFO)
6959 + sizeof (Elf_External_Options)
6960 + (sizeof (Elf64_External_RegInfo) - 8)),
6963 H_PUT_64 (abfd, elf_gp (abfd), buf);
6964 if (bfd_bwrite (buf, 8, abfd) != 8)
6967 else if (intopt.kind == ODK_REGINFO)
6974 + sizeof (Elf_External_Options)
6975 + (sizeof (Elf32_External_RegInfo) - 4)),
6978 H_PUT_32 (abfd, elf_gp (abfd), buf);
6979 if (bfd_bwrite (buf, 4, abfd) != 4)
6986 if (hdr->bfd_section != NULL)
6988 const char *name = bfd_get_section_name (abfd, hdr->bfd_section);
6990 /* .sbss is not handled specially here because the GNU/Linux
6991 prelinker can convert .sbss from NOBITS to PROGBITS and
6992 changing it back to NOBITS breaks the binary. The entry in
6993 _bfd_mips_elf_special_sections will ensure the correct flags
6994 are set on .sbss if BFD creates it without reading it from an
6995 input file, and without special handling here the flags set
6996 on it in an input file will be followed. */
6997 if (strcmp (name, ".sdata") == 0
6998 || strcmp (name, ".lit8") == 0
6999 || strcmp (name, ".lit4") == 0)
7000 hdr->sh_flags |= SHF_ALLOC | SHF_WRITE | SHF_MIPS_GPREL;
7001 else if (strcmp (name, ".srdata") == 0)
7002 hdr->sh_flags |= SHF_ALLOC | SHF_MIPS_GPREL;
7003 else if (strcmp (name, ".compact_rel") == 0)
7005 else if (strcmp (name, ".rtproc") == 0)
7007 if (hdr->sh_addralign != 0 && hdr->sh_entsize == 0)
7009 unsigned int adjust;
7011 adjust = hdr->sh_size % hdr->sh_addralign;
7013 hdr->sh_size += hdr->sh_addralign - adjust;
7021 /* Handle a MIPS specific section when reading an object file. This
7022 is called when elfcode.h finds a section with an unknown type.
7023 This routine supports both the 32-bit and 64-bit ELF ABI.
7025 FIXME: We need to handle the SHF_MIPS_GPREL flag, but I'm not sure
7029 _bfd_mips_elf_section_from_shdr (bfd *abfd,
7030 Elf_Internal_Shdr *hdr,
7036 /* There ought to be a place to keep ELF backend specific flags, but
7037 at the moment there isn't one. We just keep track of the
7038 sections by their name, instead. Fortunately, the ABI gives
7039 suggested names for all the MIPS specific sections, so we will
7040 probably get away with this. */
7041 switch (hdr->sh_type)
7043 case SHT_MIPS_LIBLIST:
7044 if (strcmp (name, ".liblist") != 0)
7048 if (strcmp (name, ".msym") != 0)
7051 case SHT_MIPS_CONFLICT:
7052 if (strcmp (name, ".conflict") != 0)
7055 case SHT_MIPS_GPTAB:
7056 if (! CONST_STRNEQ (name, ".gptab."))
7059 case SHT_MIPS_UCODE:
7060 if (strcmp (name, ".ucode") != 0)
7063 case SHT_MIPS_DEBUG:
7064 if (strcmp (name, ".mdebug") != 0)
7066 flags = SEC_DEBUGGING;
7068 case SHT_MIPS_REGINFO:
7069 if (strcmp (name, ".reginfo") != 0
7070 || hdr->sh_size != sizeof (Elf32_External_RegInfo))
7072 flags = (SEC_LINK_ONCE | SEC_LINK_DUPLICATES_SAME_SIZE);
7074 case SHT_MIPS_IFACE:
7075 if (strcmp (name, ".MIPS.interfaces") != 0)
7078 case SHT_MIPS_CONTENT:
7079 if (! CONST_STRNEQ (name, ".MIPS.content"))
7082 case SHT_MIPS_OPTIONS:
7083 if (!MIPS_ELF_OPTIONS_SECTION_NAME_P (name))
7086 case SHT_MIPS_ABIFLAGS:
7087 if (!MIPS_ELF_ABIFLAGS_SECTION_NAME_P (name))
7089 flags = (SEC_LINK_ONCE | SEC_LINK_DUPLICATES_SAME_SIZE);
7091 case SHT_MIPS_DWARF:
7092 if (! CONST_STRNEQ (name, ".debug_")
7093 && ! CONST_STRNEQ (name, ".zdebug_"))
7096 case SHT_MIPS_SYMBOL_LIB:
7097 if (strcmp (name, ".MIPS.symlib") != 0)
7100 case SHT_MIPS_EVENTS:
7101 if (! CONST_STRNEQ (name, ".MIPS.events")
7102 && ! CONST_STRNEQ (name, ".MIPS.post_rel"))
7109 if (! _bfd_elf_make_section_from_shdr (abfd, hdr, name, shindex))
7114 if (! bfd_set_section_flags (abfd, hdr->bfd_section,
7115 (bfd_get_section_flags (abfd,
7121 if (hdr->sh_type == SHT_MIPS_ABIFLAGS)
7123 Elf_External_ABIFlags_v0 ext;
7125 if (! bfd_get_section_contents (abfd, hdr->bfd_section,
7126 &ext, 0, sizeof ext))
7128 bfd_mips_elf_swap_abiflags_v0_in (abfd, &ext,
7129 &mips_elf_tdata (abfd)->abiflags);
7130 if (mips_elf_tdata (abfd)->abiflags.version != 0)
7132 mips_elf_tdata (abfd)->abiflags_valid = TRUE;
7135 /* FIXME: We should record sh_info for a .gptab section. */
7137 /* For a .reginfo section, set the gp value in the tdata information
7138 from the contents of this section. We need the gp value while
7139 processing relocs, so we just get it now. The .reginfo section
7140 is not used in the 64-bit MIPS ELF ABI. */
7141 if (hdr->sh_type == SHT_MIPS_REGINFO)
7143 Elf32_External_RegInfo ext;
7146 if (! bfd_get_section_contents (abfd, hdr->bfd_section,
7147 &ext, 0, sizeof ext))
7149 bfd_mips_elf32_swap_reginfo_in (abfd, &ext, &s);
7150 elf_gp (abfd) = s.ri_gp_value;
7153 /* For a SHT_MIPS_OPTIONS section, look for a ODK_REGINFO entry, and
7154 set the gp value based on what we find. We may see both
7155 SHT_MIPS_REGINFO and SHT_MIPS_OPTIONS/ODK_REGINFO; in that case,
7156 they should agree. */
7157 if (hdr->sh_type == SHT_MIPS_OPTIONS)
7159 bfd_byte *contents, *l, *lend;
7161 contents = bfd_malloc (hdr->sh_size);
7162 if (contents == NULL)
7164 if (! bfd_get_section_contents (abfd, hdr->bfd_section, contents,
7171 lend = contents + hdr->sh_size;
7172 while (l + sizeof (Elf_External_Options) <= lend)
7174 Elf_Internal_Options intopt;
7176 bfd_mips_elf_swap_options_in (abfd, (Elf_External_Options *) l,
7178 if (intopt.size < sizeof (Elf_External_Options))
7180 (*_bfd_error_handler)
7181 (_("%B: Warning: bad `%s' option size %u smaller than its header"),
7182 abfd, MIPS_ELF_OPTIONS_SECTION_NAME (abfd), intopt.size);
7185 if (ABI_64_P (abfd) && intopt.kind == ODK_REGINFO)
7187 Elf64_Internal_RegInfo intreg;
7189 bfd_mips_elf64_swap_reginfo_in
7191 ((Elf64_External_RegInfo *)
7192 (l + sizeof (Elf_External_Options))),
7194 elf_gp (abfd) = intreg.ri_gp_value;
7196 else if (intopt.kind == ODK_REGINFO)
7198 Elf32_RegInfo intreg;
7200 bfd_mips_elf32_swap_reginfo_in
7202 ((Elf32_External_RegInfo *)
7203 (l + sizeof (Elf_External_Options))),
7205 elf_gp (abfd) = intreg.ri_gp_value;
7215 /* Set the correct type for a MIPS ELF section. We do this by the
7216 section name, which is a hack, but ought to work. This routine is
7217 used by both the 32-bit and the 64-bit ABI. */
7220 _bfd_mips_elf_fake_sections (bfd *abfd, Elf_Internal_Shdr *hdr, asection *sec)
7222 const char *name = bfd_get_section_name (abfd, sec);
7224 if (strcmp (name, ".liblist") == 0)
7226 hdr->sh_type = SHT_MIPS_LIBLIST;
7227 hdr->sh_info = sec->size / sizeof (Elf32_Lib);
7228 /* The sh_link field is set in final_write_processing. */
7230 else if (strcmp (name, ".conflict") == 0)
7231 hdr->sh_type = SHT_MIPS_CONFLICT;
7232 else if (CONST_STRNEQ (name, ".gptab."))
7234 hdr->sh_type = SHT_MIPS_GPTAB;
7235 hdr->sh_entsize = sizeof (Elf32_External_gptab);
7236 /* The sh_info field is set in final_write_processing. */
7238 else if (strcmp (name, ".ucode") == 0)
7239 hdr->sh_type = SHT_MIPS_UCODE;
7240 else if (strcmp (name, ".mdebug") == 0)
7242 hdr->sh_type = SHT_MIPS_DEBUG;
7243 /* In a shared object on IRIX 5.3, the .mdebug section has an
7244 entsize of 0. FIXME: Does this matter? */
7245 if (SGI_COMPAT (abfd) && (abfd->flags & DYNAMIC) != 0)
7246 hdr->sh_entsize = 0;
7248 hdr->sh_entsize = 1;
7250 else if (strcmp (name, ".reginfo") == 0)
7252 hdr->sh_type = SHT_MIPS_REGINFO;
7253 /* In a shared object on IRIX 5.3, the .reginfo section has an
7254 entsize of 0x18. FIXME: Does this matter? */
7255 if (SGI_COMPAT (abfd))
7257 if ((abfd->flags & DYNAMIC) != 0)
7258 hdr->sh_entsize = sizeof (Elf32_External_RegInfo);
7260 hdr->sh_entsize = 1;
7263 hdr->sh_entsize = sizeof (Elf32_External_RegInfo);
7265 else if (SGI_COMPAT (abfd)
7266 && (strcmp (name, ".hash") == 0
7267 || strcmp (name, ".dynamic") == 0
7268 || strcmp (name, ".dynstr") == 0))
7270 if (SGI_COMPAT (abfd))
7271 hdr->sh_entsize = 0;
7273 /* This isn't how the IRIX6 linker behaves. */
7274 hdr->sh_info = SIZEOF_MIPS_DYNSYM_SECNAMES;
7277 else if (strcmp (name, ".got") == 0
7278 || strcmp (name, ".srdata") == 0
7279 || strcmp (name, ".sdata") == 0
7280 || strcmp (name, ".sbss") == 0
7281 || strcmp (name, ".lit4") == 0
7282 || strcmp (name, ".lit8") == 0)
7283 hdr->sh_flags |= SHF_MIPS_GPREL;
7284 else if (strcmp (name, ".MIPS.interfaces") == 0)
7286 hdr->sh_type = SHT_MIPS_IFACE;
7287 hdr->sh_flags |= SHF_MIPS_NOSTRIP;
7289 else if (CONST_STRNEQ (name, ".MIPS.content"))
7291 hdr->sh_type = SHT_MIPS_CONTENT;
7292 hdr->sh_flags |= SHF_MIPS_NOSTRIP;
7293 /* The sh_info field is set in final_write_processing. */
7295 else if (MIPS_ELF_OPTIONS_SECTION_NAME_P (name))
7297 hdr->sh_type = SHT_MIPS_OPTIONS;
7298 hdr->sh_entsize = 1;
7299 hdr->sh_flags |= SHF_MIPS_NOSTRIP;
7301 else if (CONST_STRNEQ (name, ".MIPS.abiflags"))
7303 hdr->sh_type = SHT_MIPS_ABIFLAGS;
7304 hdr->sh_entsize = sizeof (Elf_External_ABIFlags_v0);
7306 else if (CONST_STRNEQ (name, ".debug_")
7307 || CONST_STRNEQ (name, ".zdebug_"))
7309 hdr->sh_type = SHT_MIPS_DWARF;
7311 /* Irix facilities such as libexc expect a single .debug_frame
7312 per executable, the system ones have NOSTRIP set and the linker
7313 doesn't merge sections with different flags so ... */
7314 if (SGI_COMPAT (abfd) && CONST_STRNEQ (name, ".debug_frame"))
7315 hdr->sh_flags |= SHF_MIPS_NOSTRIP;
7317 else if (strcmp (name, ".MIPS.symlib") == 0)
7319 hdr->sh_type = SHT_MIPS_SYMBOL_LIB;
7320 /* The sh_link and sh_info fields are set in
7321 final_write_processing. */
7323 else if (CONST_STRNEQ (name, ".MIPS.events")
7324 || CONST_STRNEQ (name, ".MIPS.post_rel"))
7326 hdr->sh_type = SHT_MIPS_EVENTS;
7327 hdr->sh_flags |= SHF_MIPS_NOSTRIP;
7328 /* The sh_link field is set in final_write_processing. */
7330 else if (strcmp (name, ".msym") == 0)
7332 hdr->sh_type = SHT_MIPS_MSYM;
7333 hdr->sh_flags |= SHF_ALLOC;
7334 hdr->sh_entsize = 8;
7337 /* The generic elf_fake_sections will set up REL_HDR using the default
7338 kind of relocations. We used to set up a second header for the
7339 non-default kind of relocations here, but only NewABI would use
7340 these, and the IRIX ld doesn't like resulting empty RELA sections.
7341 Thus we create those header only on demand now. */
7346 /* Given a BFD section, try to locate the corresponding ELF section
7347 index. This is used by both the 32-bit and the 64-bit ABI.
7348 Actually, it's not clear to me that the 64-bit ABI supports these,
7349 but for non-PIC objects we will certainly want support for at least
7350 the .scommon section. */
7353 _bfd_mips_elf_section_from_bfd_section (bfd *abfd ATTRIBUTE_UNUSED,
7354 asection *sec, int *retval)
7356 if (strcmp (bfd_get_section_name (abfd, sec), ".scommon") == 0)
7358 *retval = SHN_MIPS_SCOMMON;
7361 if (strcmp (bfd_get_section_name (abfd, sec), ".acommon") == 0)
7363 *retval = SHN_MIPS_ACOMMON;
7369 /* Hook called by the linker routine which adds symbols from an object
7370 file. We must handle the special MIPS section numbers here. */
7373 _bfd_mips_elf_add_symbol_hook (bfd *abfd, struct bfd_link_info *info,
7374 Elf_Internal_Sym *sym, const char **namep,
7375 flagword *flagsp ATTRIBUTE_UNUSED,
7376 asection **secp, bfd_vma *valp)
7378 if (SGI_COMPAT (abfd)
7379 && (abfd->flags & DYNAMIC) != 0
7380 && strcmp (*namep, "_rld_new_interface") == 0)
7382 /* Skip IRIX5 rld entry name. */
7387 /* Shared objects may have a dynamic symbol '_gp_disp' defined as
7388 a SECTION *ABS*. This causes ld to think it can resolve _gp_disp
7389 by setting a DT_NEEDED for the shared object. Since _gp_disp is
7390 a magic symbol resolved by the linker, we ignore this bogus definition
7391 of _gp_disp. New ABI objects do not suffer from this problem so this
7392 is not done for them. */
7394 && (sym->st_shndx == SHN_ABS)
7395 && (strcmp (*namep, "_gp_disp") == 0))
7401 switch (sym->st_shndx)
7404 /* Common symbols less than the GP size are automatically
7405 treated as SHN_MIPS_SCOMMON symbols. */
7406 if (sym->st_size > elf_gp_size (abfd)
7407 || ELF_ST_TYPE (sym->st_info) == STT_TLS
7408 || IRIX_COMPAT (abfd) == ict_irix6)
7411 case SHN_MIPS_SCOMMON:
7412 *secp = bfd_make_section_old_way (abfd, ".scommon");
7413 (*secp)->flags |= SEC_IS_COMMON;
7414 *valp = sym->st_size;
7418 /* This section is used in a shared object. */
7419 if (mips_elf_tdata (abfd)->elf_text_section == NULL)
7421 asymbol *elf_text_symbol;
7422 asection *elf_text_section;
7423 bfd_size_type amt = sizeof (asection);
7425 elf_text_section = bfd_zalloc (abfd, amt);
7426 if (elf_text_section == NULL)
7429 amt = sizeof (asymbol);
7430 elf_text_symbol = bfd_zalloc (abfd, amt);
7431 if (elf_text_symbol == NULL)
7434 /* Initialize the section. */
7436 mips_elf_tdata (abfd)->elf_text_section = elf_text_section;
7437 mips_elf_tdata (abfd)->elf_text_symbol = elf_text_symbol;
7439 elf_text_section->symbol = elf_text_symbol;
7440 elf_text_section->symbol_ptr_ptr = &mips_elf_tdata (abfd)->elf_text_symbol;
7442 elf_text_section->name = ".text";
7443 elf_text_section->flags = SEC_NO_FLAGS;
7444 elf_text_section->output_section = NULL;
7445 elf_text_section->owner = abfd;
7446 elf_text_symbol->name = ".text";
7447 elf_text_symbol->flags = BSF_SECTION_SYM | BSF_DYNAMIC;
7448 elf_text_symbol->section = elf_text_section;
7450 /* This code used to do *secp = bfd_und_section_ptr if
7451 bfd_link_pic (info). I don't know why, and that doesn't make sense,
7452 so I took it out. */
7453 *secp = mips_elf_tdata (abfd)->elf_text_section;
7456 case SHN_MIPS_ACOMMON:
7457 /* Fall through. XXX Can we treat this as allocated data? */
7459 /* This section is used in a shared object. */
7460 if (mips_elf_tdata (abfd)->elf_data_section == NULL)
7462 asymbol *elf_data_symbol;
7463 asection *elf_data_section;
7464 bfd_size_type amt = sizeof (asection);
7466 elf_data_section = bfd_zalloc (abfd, amt);
7467 if (elf_data_section == NULL)
7470 amt = sizeof (asymbol);
7471 elf_data_symbol = bfd_zalloc (abfd, amt);
7472 if (elf_data_symbol == NULL)
7475 /* Initialize the section. */
7477 mips_elf_tdata (abfd)->elf_data_section = elf_data_section;
7478 mips_elf_tdata (abfd)->elf_data_symbol = elf_data_symbol;
7480 elf_data_section->symbol = elf_data_symbol;
7481 elf_data_section->symbol_ptr_ptr = &mips_elf_tdata (abfd)->elf_data_symbol;
7483 elf_data_section->name = ".data";
7484 elf_data_section->flags = SEC_NO_FLAGS;
7485 elf_data_section->output_section = NULL;
7486 elf_data_section->owner = abfd;
7487 elf_data_symbol->name = ".data";
7488 elf_data_symbol->flags = BSF_SECTION_SYM | BSF_DYNAMIC;
7489 elf_data_symbol->section = elf_data_section;
7491 /* This code used to do *secp = bfd_und_section_ptr if
7492 bfd_link_pic (info). I don't know why, and that doesn't make sense,
7493 so I took it out. */
7494 *secp = mips_elf_tdata (abfd)->elf_data_section;
7497 case SHN_MIPS_SUNDEFINED:
7498 *secp = bfd_und_section_ptr;
7502 if (SGI_COMPAT (abfd)
7503 && ! bfd_link_pic (info)
7504 && info->output_bfd->xvec == abfd->xvec
7505 && strcmp (*namep, "__rld_obj_head") == 0)
7507 struct elf_link_hash_entry *h;
7508 struct bfd_link_hash_entry *bh;
7510 /* Mark __rld_obj_head as dynamic. */
7512 if (! (_bfd_generic_link_add_one_symbol
7513 (info, abfd, *namep, BSF_GLOBAL, *secp, *valp, NULL, FALSE,
7514 get_elf_backend_data (abfd)->collect, &bh)))
7517 h = (struct elf_link_hash_entry *) bh;
7520 h->type = STT_OBJECT;
7522 if (! bfd_elf_link_record_dynamic_symbol (info, h))
7525 mips_elf_hash_table (info)->use_rld_obj_head = TRUE;
7526 mips_elf_hash_table (info)->rld_symbol = h;
7529 /* If this is a mips16 text symbol, add 1 to the value to make it
7530 odd. This will cause something like .word SYM to come up with
7531 the right value when it is loaded into the PC. */
7532 if (ELF_ST_IS_COMPRESSED (sym->st_other))
7538 /* This hook function is called before the linker writes out a global
7539 symbol. We mark symbols as small common if appropriate. This is
7540 also where we undo the increment of the value for a mips16 symbol. */
7543 _bfd_mips_elf_link_output_symbol_hook
7544 (struct bfd_link_info *info ATTRIBUTE_UNUSED,
7545 const char *name ATTRIBUTE_UNUSED, Elf_Internal_Sym *sym,
7546 asection *input_sec, struct elf_link_hash_entry *h ATTRIBUTE_UNUSED)
7548 /* If we see a common symbol, which implies a relocatable link, then
7549 if a symbol was small common in an input file, mark it as small
7550 common in the output file. */
7551 if (sym->st_shndx == SHN_COMMON
7552 && strcmp (input_sec->name, ".scommon") == 0)
7553 sym->st_shndx = SHN_MIPS_SCOMMON;
7555 if (ELF_ST_IS_COMPRESSED (sym->st_other))
7556 sym->st_value &= ~1;
7561 /* Functions for the dynamic linker. */
7563 /* Create dynamic sections when linking against a dynamic object. */
7566 _bfd_mips_elf_create_dynamic_sections (bfd *abfd, struct bfd_link_info *info)
7568 struct elf_link_hash_entry *h;
7569 struct bfd_link_hash_entry *bh;
7571 register asection *s;
7572 const char * const *namep;
7573 struct mips_elf_link_hash_table *htab;
7575 htab = mips_elf_hash_table (info);
7576 BFD_ASSERT (htab != NULL);
7578 flags = (SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS | SEC_IN_MEMORY
7579 | SEC_LINKER_CREATED | SEC_READONLY);
7581 /* The psABI requires a read-only .dynamic section, but the VxWorks
7583 if (!htab->is_vxworks)
7585 s = bfd_get_linker_section (abfd, ".dynamic");
7588 if (! bfd_set_section_flags (abfd, s, flags))
7593 /* We need to create .got section. */
7594 if (!mips_elf_create_got_section (abfd, info))
7597 if (! mips_elf_rel_dyn_section (info, TRUE))
7600 /* Create .stub section. */
7601 s = bfd_make_section_anyway_with_flags (abfd,
7602 MIPS_ELF_STUB_SECTION_NAME (abfd),
7605 || ! bfd_set_section_alignment (abfd, s,
7606 MIPS_ELF_LOG_FILE_ALIGN (abfd)))
7610 if (!mips_elf_hash_table (info)->use_rld_obj_head
7611 && bfd_link_executable (info)
7612 && bfd_get_linker_section (abfd, ".rld_map") == NULL)
7614 s = bfd_make_section_anyway_with_flags (abfd, ".rld_map",
7615 flags &~ (flagword) SEC_READONLY);
7617 || ! bfd_set_section_alignment (abfd, s,
7618 MIPS_ELF_LOG_FILE_ALIGN (abfd)))
7622 /* On IRIX5, we adjust add some additional symbols and change the
7623 alignments of several sections. There is no ABI documentation
7624 indicating that this is necessary on IRIX6, nor any evidence that
7625 the linker takes such action. */
7626 if (IRIX_COMPAT (abfd) == ict_irix5)
7628 for (namep = mips_elf_dynsym_rtproc_names; *namep != NULL; namep++)
7631 if (! (_bfd_generic_link_add_one_symbol
7632 (info, abfd, *namep, BSF_GLOBAL, bfd_und_section_ptr, 0,
7633 NULL, FALSE, get_elf_backend_data (abfd)->collect, &bh)))
7636 h = (struct elf_link_hash_entry *) bh;
7639 h->type = STT_SECTION;
7641 if (! bfd_elf_link_record_dynamic_symbol (info, h))
7645 /* We need to create a .compact_rel section. */
7646 if (SGI_COMPAT (abfd))
7648 if (!mips_elf_create_compact_rel_section (abfd, info))
7652 /* Change alignments of some sections. */
7653 s = bfd_get_linker_section (abfd, ".hash");
7655 (void) bfd_set_section_alignment (abfd, s, MIPS_ELF_LOG_FILE_ALIGN (abfd));
7657 s = bfd_get_linker_section (abfd, ".dynsym");
7659 (void) bfd_set_section_alignment (abfd, s, MIPS_ELF_LOG_FILE_ALIGN (abfd));
7661 s = bfd_get_linker_section (abfd, ".dynstr");
7663 (void) bfd_set_section_alignment (abfd, s, MIPS_ELF_LOG_FILE_ALIGN (abfd));
7666 s = bfd_get_section_by_name (abfd, ".reginfo");
7668 (void) bfd_set_section_alignment (abfd, s, MIPS_ELF_LOG_FILE_ALIGN (abfd));
7670 s = bfd_get_linker_section (abfd, ".dynamic");
7672 (void) bfd_set_section_alignment (abfd, s, MIPS_ELF_LOG_FILE_ALIGN (abfd));
7675 if (bfd_link_executable (info))
7679 name = SGI_COMPAT (abfd) ? "_DYNAMIC_LINK" : "_DYNAMIC_LINKING";
7681 if (!(_bfd_generic_link_add_one_symbol
7682 (info, abfd, name, BSF_GLOBAL, bfd_abs_section_ptr, 0,
7683 NULL, FALSE, get_elf_backend_data (abfd)->collect, &bh)))
7686 h = (struct elf_link_hash_entry *) bh;
7689 h->type = STT_SECTION;
7691 if (! bfd_elf_link_record_dynamic_symbol (info, h))
7694 if (! mips_elf_hash_table (info)->use_rld_obj_head)
7696 /* __rld_map is a four byte word located in the .data section
7697 and is filled in by the rtld to contain a pointer to
7698 the _r_debug structure. Its symbol value will be set in
7699 _bfd_mips_elf_finish_dynamic_symbol. */
7700 s = bfd_get_linker_section (abfd, ".rld_map");
7701 BFD_ASSERT (s != NULL);
7703 name = SGI_COMPAT (abfd) ? "__rld_map" : "__RLD_MAP";
7705 if (!(_bfd_generic_link_add_one_symbol
7706 (info, abfd, name, BSF_GLOBAL, s, 0, NULL, FALSE,
7707 get_elf_backend_data (abfd)->collect, &bh)))
7710 h = (struct elf_link_hash_entry *) bh;
7713 h->type = STT_OBJECT;
7715 if (! bfd_elf_link_record_dynamic_symbol (info, h))
7717 mips_elf_hash_table (info)->rld_symbol = h;
7721 /* Create the .plt, .rel(a).plt, .dynbss and .rel(a).bss sections.
7722 Also, on VxWorks, create the _PROCEDURE_LINKAGE_TABLE_ symbol. */
7723 if (!_bfd_elf_create_dynamic_sections (abfd, info))
7726 /* Cache the sections created above. */
7727 htab->splt = bfd_get_linker_section (abfd, ".plt");
7728 htab->sdynbss = bfd_get_linker_section (abfd, ".dynbss");
7729 if (htab->is_vxworks)
7731 htab->srelbss = bfd_get_linker_section (abfd, ".rela.bss");
7732 htab->srelplt = bfd_get_linker_section (abfd, ".rela.plt");
7735 htab->srelplt = bfd_get_linker_section (abfd, ".rel.plt");
7737 || (htab->is_vxworks && !htab->srelbss && !bfd_link_pic (info))
7742 /* Do the usual VxWorks handling. */
7743 if (htab->is_vxworks
7744 && !elf_vxworks_create_dynamic_sections (abfd, info, &htab->srelplt2))
7750 /* Return true if relocation REL against section SEC is a REL rather than
7751 RELA relocation. RELOCS is the first relocation in the section and
7752 ABFD is the bfd that contains SEC. */
7755 mips_elf_rel_relocation_p (bfd *abfd, asection *sec,
7756 const Elf_Internal_Rela *relocs,
7757 const Elf_Internal_Rela *rel)
7759 Elf_Internal_Shdr *rel_hdr;
7760 const struct elf_backend_data *bed;
7762 /* To determine which flavor of relocation this is, we depend on the
7763 fact that the INPUT_SECTION's REL_HDR is read before RELA_HDR. */
7764 rel_hdr = elf_section_data (sec)->rel.hdr;
7765 if (rel_hdr == NULL)
7767 bed = get_elf_backend_data (abfd);
7768 return ((size_t) (rel - relocs)
7769 < NUM_SHDR_ENTRIES (rel_hdr) * bed->s->int_rels_per_ext_rel);
7772 /* Read the addend for REL relocation REL, which belongs to bfd ABFD.
7773 HOWTO is the relocation's howto and CONTENTS points to the contents
7774 of the section that REL is against. */
7777 mips_elf_read_rel_addend (bfd *abfd, const Elf_Internal_Rela *rel,
7778 reloc_howto_type *howto, bfd_byte *contents)
7781 unsigned int r_type;
7785 r_type = ELF_R_TYPE (abfd, rel->r_info);
7786 location = contents + rel->r_offset;
7788 /* Get the addend, which is stored in the input file. */
7789 _bfd_mips_elf_reloc_unshuffle (abfd, r_type, FALSE, location);
7790 bytes = mips_elf_obtain_contents (howto, rel, abfd, contents);
7791 _bfd_mips_elf_reloc_shuffle (abfd, r_type, FALSE, location);
7793 addend = bytes & howto->src_mask;
7795 /* Shift is 2, unusually, for microMIPS JALX. Adjust the addend
7797 if (r_type == R_MICROMIPS_26_S1 && (bytes >> 26) == 0x3c)
7803 /* REL is a relocation in ABFD that needs a partnering LO16 relocation
7804 and *ADDEND is the addend for REL itself. Look for the LO16 relocation
7805 and update *ADDEND with the final addend. Return true on success
7806 or false if the LO16 could not be found. RELEND is the exclusive
7807 upper bound on the relocations for REL's section. */
7810 mips_elf_add_lo16_rel_addend (bfd *abfd,
7811 const Elf_Internal_Rela *rel,
7812 const Elf_Internal_Rela *relend,
7813 bfd_byte *contents, bfd_vma *addend)
7815 unsigned int r_type, lo16_type;
7816 const Elf_Internal_Rela *lo16_relocation;
7817 reloc_howto_type *lo16_howto;
7820 r_type = ELF_R_TYPE (abfd, rel->r_info);
7821 if (mips16_reloc_p (r_type))
7822 lo16_type = R_MIPS16_LO16;
7823 else if (micromips_reloc_p (r_type))
7824 lo16_type = R_MICROMIPS_LO16;
7825 else if (r_type == R_MIPS_PCHI16)
7826 lo16_type = R_MIPS_PCLO16;
7828 lo16_type = R_MIPS_LO16;
7830 /* The combined value is the sum of the HI16 addend, left-shifted by
7831 sixteen bits, and the LO16 addend, sign extended. (Usually, the
7832 code does a `lui' of the HI16 value, and then an `addiu' of the
7835 Scan ahead to find a matching LO16 relocation.
7837 According to the MIPS ELF ABI, the R_MIPS_LO16 relocation must
7838 be immediately following. However, for the IRIX6 ABI, the next
7839 relocation may be a composed relocation consisting of several
7840 relocations for the same address. In that case, the R_MIPS_LO16
7841 relocation may occur as one of these. We permit a similar
7842 extension in general, as that is useful for GCC.
7844 In some cases GCC dead code elimination removes the LO16 but keeps
7845 the corresponding HI16. This is strictly speaking a violation of
7846 the ABI but not immediately harmful. */
7847 lo16_relocation = mips_elf_next_relocation (abfd, lo16_type, rel, relend);
7848 if (lo16_relocation == NULL)
7851 /* Obtain the addend kept there. */
7852 lo16_howto = MIPS_ELF_RTYPE_TO_HOWTO (abfd, lo16_type, FALSE);
7853 l = mips_elf_read_rel_addend (abfd, lo16_relocation, lo16_howto, contents);
7855 l <<= lo16_howto->rightshift;
7856 l = _bfd_mips_elf_sign_extend (l, 16);
7863 /* Try to read the contents of section SEC in bfd ABFD. Return true and
7864 store the contents in *CONTENTS on success. Assume that *CONTENTS
7865 already holds the contents if it is nonull on entry. */
7868 mips_elf_get_section_contents (bfd *abfd, asection *sec, bfd_byte **contents)
7873 /* Get cached copy if it exists. */
7874 if (elf_section_data (sec)->this_hdr.contents != NULL)
7876 *contents = elf_section_data (sec)->this_hdr.contents;
7880 return bfd_malloc_and_get_section (abfd, sec, contents);
7883 /* Make a new PLT record to keep internal data. */
7885 static struct plt_entry *
7886 mips_elf_make_plt_record (bfd *abfd)
7888 struct plt_entry *entry;
7890 entry = bfd_zalloc (abfd, sizeof (*entry));
7894 entry->stub_offset = MINUS_ONE;
7895 entry->mips_offset = MINUS_ONE;
7896 entry->comp_offset = MINUS_ONE;
7897 entry->gotplt_index = MINUS_ONE;
7901 /* Look through the relocs for a section during the first phase, and
7902 allocate space in the global offset table and record the need for
7903 standard MIPS and compressed procedure linkage table entries. */
7906 _bfd_mips_elf_check_relocs (bfd *abfd, struct bfd_link_info *info,
7907 asection *sec, const Elf_Internal_Rela *relocs)
7911 Elf_Internal_Shdr *symtab_hdr;
7912 struct elf_link_hash_entry **sym_hashes;
7914 const Elf_Internal_Rela *rel;
7915 const Elf_Internal_Rela *rel_end;
7917 const struct elf_backend_data *bed;
7918 struct mips_elf_link_hash_table *htab;
7921 reloc_howto_type *howto;
7923 if (bfd_link_relocatable (info))
7926 htab = mips_elf_hash_table (info);
7927 BFD_ASSERT (htab != NULL);
7929 dynobj = elf_hash_table (info)->dynobj;
7930 symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
7931 sym_hashes = elf_sym_hashes (abfd);
7932 extsymoff = (elf_bad_symtab (abfd)) ? 0 : symtab_hdr->sh_info;
7934 bed = get_elf_backend_data (abfd);
7935 rel_end = relocs + sec->reloc_count * bed->s->int_rels_per_ext_rel;
7937 /* Check for the mips16 stub sections. */
7939 name = bfd_get_section_name (abfd, sec);
7940 if (FN_STUB_P (name))
7942 unsigned long r_symndx;
7944 /* Look at the relocation information to figure out which symbol
7947 r_symndx = mips16_stub_symndx (bed, sec, relocs, rel_end);
7950 (*_bfd_error_handler)
7951 (_("%B: Warning: cannot determine the target function for"
7952 " stub section `%s'"),
7954 bfd_set_error (bfd_error_bad_value);
7958 if (r_symndx < extsymoff
7959 || sym_hashes[r_symndx - extsymoff] == NULL)
7963 /* This stub is for a local symbol. This stub will only be
7964 needed if there is some relocation in this BFD, other
7965 than a 16 bit function call, which refers to this symbol. */
7966 for (o = abfd->sections; o != NULL; o = o->next)
7968 Elf_Internal_Rela *sec_relocs;
7969 const Elf_Internal_Rela *r, *rend;
7971 /* We can ignore stub sections when looking for relocs. */
7972 if ((o->flags & SEC_RELOC) == 0
7973 || o->reloc_count == 0
7974 || section_allows_mips16_refs_p (o))
7978 = _bfd_elf_link_read_relocs (abfd, o, NULL, NULL,
7980 if (sec_relocs == NULL)
7983 rend = sec_relocs + o->reloc_count;
7984 for (r = sec_relocs; r < rend; r++)
7985 if (ELF_R_SYM (abfd, r->r_info) == r_symndx
7986 && !mips16_call_reloc_p (ELF_R_TYPE (abfd, r->r_info)))
7989 if (elf_section_data (o)->relocs != sec_relocs)
7998 /* There is no non-call reloc for this stub, so we do
7999 not need it. Since this function is called before
8000 the linker maps input sections to output sections, we
8001 can easily discard it by setting the SEC_EXCLUDE
8003 sec->flags |= SEC_EXCLUDE;
8007 /* Record this stub in an array of local symbol stubs for
8009 if (mips_elf_tdata (abfd)->local_stubs == NULL)
8011 unsigned long symcount;
8015 if (elf_bad_symtab (abfd))
8016 symcount = NUM_SHDR_ENTRIES (symtab_hdr);
8018 symcount = symtab_hdr->sh_info;
8019 amt = symcount * sizeof (asection *);
8020 n = bfd_zalloc (abfd, amt);
8023 mips_elf_tdata (abfd)->local_stubs = n;
8026 sec->flags |= SEC_KEEP;
8027 mips_elf_tdata (abfd)->local_stubs[r_symndx] = sec;
8029 /* We don't need to set mips16_stubs_seen in this case.
8030 That flag is used to see whether we need to look through
8031 the global symbol table for stubs. We don't need to set
8032 it here, because we just have a local stub. */
8036 struct mips_elf_link_hash_entry *h;
8038 h = ((struct mips_elf_link_hash_entry *)
8039 sym_hashes[r_symndx - extsymoff]);
8041 while (h->root.root.type == bfd_link_hash_indirect
8042 || h->root.root.type == bfd_link_hash_warning)
8043 h = (struct mips_elf_link_hash_entry *) h->root.root.u.i.link;
8045 /* H is the symbol this stub is for. */
8047 /* If we already have an appropriate stub for this function, we
8048 don't need another one, so we can discard this one. Since
8049 this function is called before the linker maps input sections
8050 to output sections, we can easily discard it by setting the
8051 SEC_EXCLUDE flag. */
8052 if (h->fn_stub != NULL)
8054 sec->flags |= SEC_EXCLUDE;
8058 sec->flags |= SEC_KEEP;
8060 mips_elf_hash_table (info)->mips16_stubs_seen = TRUE;
8063 else if (CALL_STUB_P (name) || CALL_FP_STUB_P (name))
8065 unsigned long r_symndx;
8066 struct mips_elf_link_hash_entry *h;
8069 /* Look at the relocation information to figure out which symbol
8072 r_symndx = mips16_stub_symndx (bed, sec, relocs, rel_end);
8075 (*_bfd_error_handler)
8076 (_("%B: Warning: cannot determine the target function for"
8077 " stub section `%s'"),
8079 bfd_set_error (bfd_error_bad_value);
8083 if (r_symndx < extsymoff
8084 || sym_hashes[r_symndx - extsymoff] == NULL)
8088 /* This stub is for a local symbol. This stub will only be
8089 needed if there is some relocation (R_MIPS16_26) in this BFD
8090 that refers to this symbol. */
8091 for (o = abfd->sections; o != NULL; o = o->next)
8093 Elf_Internal_Rela *sec_relocs;
8094 const Elf_Internal_Rela *r, *rend;
8096 /* We can ignore stub sections when looking for relocs. */
8097 if ((o->flags & SEC_RELOC) == 0
8098 || o->reloc_count == 0
8099 || section_allows_mips16_refs_p (o))
8103 = _bfd_elf_link_read_relocs (abfd, o, NULL, NULL,
8105 if (sec_relocs == NULL)
8108 rend = sec_relocs + o->reloc_count;
8109 for (r = sec_relocs; r < rend; r++)
8110 if (ELF_R_SYM (abfd, r->r_info) == r_symndx
8111 && ELF_R_TYPE (abfd, r->r_info) == R_MIPS16_26)
8114 if (elf_section_data (o)->relocs != sec_relocs)
8123 /* There is no non-call reloc for this stub, so we do
8124 not need it. Since this function is called before
8125 the linker maps input sections to output sections, we
8126 can easily discard it by setting the SEC_EXCLUDE
8128 sec->flags |= SEC_EXCLUDE;
8132 /* Record this stub in an array of local symbol call_stubs for
8134 if (mips_elf_tdata (abfd)->local_call_stubs == NULL)
8136 unsigned long symcount;
8140 if (elf_bad_symtab (abfd))
8141 symcount = NUM_SHDR_ENTRIES (symtab_hdr);
8143 symcount = symtab_hdr->sh_info;
8144 amt = symcount * sizeof (asection *);
8145 n = bfd_zalloc (abfd, amt);
8148 mips_elf_tdata (abfd)->local_call_stubs = n;
8151 sec->flags |= SEC_KEEP;
8152 mips_elf_tdata (abfd)->local_call_stubs[r_symndx] = sec;
8154 /* We don't need to set mips16_stubs_seen in this case.
8155 That flag is used to see whether we need to look through
8156 the global symbol table for stubs. We don't need to set
8157 it here, because we just have a local stub. */
8161 h = ((struct mips_elf_link_hash_entry *)
8162 sym_hashes[r_symndx - extsymoff]);
8164 /* H is the symbol this stub is for. */
8166 if (CALL_FP_STUB_P (name))
8167 loc = &h->call_fp_stub;
8169 loc = &h->call_stub;
8171 /* If we already have an appropriate stub for this function, we
8172 don't need another one, so we can discard this one. Since
8173 this function is called before the linker maps input sections
8174 to output sections, we can easily discard it by setting the
8175 SEC_EXCLUDE flag. */
8178 sec->flags |= SEC_EXCLUDE;
8182 sec->flags |= SEC_KEEP;
8184 mips_elf_hash_table (info)->mips16_stubs_seen = TRUE;
8190 for (rel = relocs; rel < rel_end; ++rel)
8192 unsigned long r_symndx;
8193 unsigned int r_type;
8194 struct elf_link_hash_entry *h;
8195 bfd_boolean can_make_dynamic_p;
8196 bfd_boolean call_reloc_p;
8197 bfd_boolean constrain_symbol_p;
8199 r_symndx = ELF_R_SYM (abfd, rel->r_info);
8200 r_type = ELF_R_TYPE (abfd, rel->r_info);
8202 if (r_symndx < extsymoff)
8204 else if (r_symndx >= extsymoff + NUM_SHDR_ENTRIES (symtab_hdr))
8206 (*_bfd_error_handler)
8207 (_("%B: Malformed reloc detected for section %s"),
8209 bfd_set_error (bfd_error_bad_value);
8214 h = sym_hashes[r_symndx - extsymoff];
8217 while (h->root.type == bfd_link_hash_indirect
8218 || h->root.type == bfd_link_hash_warning)
8219 h = (struct elf_link_hash_entry *) h->root.u.i.link;
8221 /* PR15323, ref flags aren't set for references in the
8223 h->root.non_ir_ref = 1;
8227 /* Set CAN_MAKE_DYNAMIC_P to true if we can convert this
8228 relocation into a dynamic one. */
8229 can_make_dynamic_p = FALSE;
8231 /* Set CALL_RELOC_P to true if the relocation is for a call,
8232 and if pointer equality therefore doesn't matter. */
8233 call_reloc_p = FALSE;
8235 /* Set CONSTRAIN_SYMBOL_P if we need to take the relocation
8236 into account when deciding how to define the symbol.
8237 Relocations in nonallocatable sections such as .pdr and
8238 .debug* should have no effect. */
8239 constrain_symbol_p = ((sec->flags & SEC_ALLOC) != 0);
8244 case R_MIPS_CALL_HI16:
8245 case R_MIPS_CALL_LO16:
8246 case R_MIPS16_CALL16:
8247 case R_MICROMIPS_CALL16:
8248 case R_MICROMIPS_CALL_HI16:
8249 case R_MICROMIPS_CALL_LO16:
8250 call_reloc_p = TRUE;
8254 case R_MIPS_GOT_HI16:
8255 case R_MIPS_GOT_LO16:
8256 case R_MIPS_GOT_PAGE:
8257 case R_MIPS_GOT_OFST:
8258 case R_MIPS_GOT_DISP:
8259 case R_MIPS_TLS_GOTTPREL:
8261 case R_MIPS_TLS_LDM:
8262 case R_MIPS16_GOT16:
8263 case R_MIPS16_TLS_GOTTPREL:
8264 case R_MIPS16_TLS_GD:
8265 case R_MIPS16_TLS_LDM:
8266 case R_MICROMIPS_GOT16:
8267 case R_MICROMIPS_GOT_HI16:
8268 case R_MICROMIPS_GOT_LO16:
8269 case R_MICROMIPS_GOT_PAGE:
8270 case R_MICROMIPS_GOT_OFST:
8271 case R_MICROMIPS_GOT_DISP:
8272 case R_MICROMIPS_TLS_GOTTPREL:
8273 case R_MICROMIPS_TLS_GD:
8274 case R_MICROMIPS_TLS_LDM:
8276 elf_hash_table (info)->dynobj = dynobj = abfd;
8277 if (!mips_elf_create_got_section (dynobj, info))
8279 if (htab->is_vxworks && !bfd_link_pic (info))
8281 (*_bfd_error_handler)
8282 (_("%B: GOT reloc at 0x%lx not expected in executables"),
8283 abfd, (unsigned long) rel->r_offset);
8284 bfd_set_error (bfd_error_bad_value);
8287 can_make_dynamic_p = TRUE;
8292 case R_MICROMIPS_JALR:
8293 /* These relocations have empty fields and are purely there to
8294 provide link information. The symbol value doesn't matter. */
8295 constrain_symbol_p = FALSE;
8298 case R_MIPS_GPREL16:
8299 case R_MIPS_GPREL32:
8300 case R_MIPS16_GPREL:
8301 case R_MICROMIPS_GPREL16:
8302 /* GP-relative relocations always resolve to a definition in a
8303 regular input file, ignoring the one-definition rule. This is
8304 important for the GP setup sequence in NewABI code, which
8305 always resolves to a local function even if other relocations
8306 against the symbol wouldn't. */
8307 constrain_symbol_p = FALSE;
8313 /* In VxWorks executables, references to external symbols
8314 must be handled using copy relocs or PLT entries; it is not
8315 possible to convert this relocation into a dynamic one.
8317 For executables that use PLTs and copy-relocs, we have a
8318 choice between converting the relocation into a dynamic
8319 one or using copy relocations or PLT entries. It is
8320 usually better to do the former, unless the relocation is
8321 against a read-only section. */
8322 if ((bfd_link_pic (info)
8324 && !htab->is_vxworks
8325 && strcmp (h->root.root.string, "__gnu_local_gp") != 0
8326 && !(!info->nocopyreloc
8327 && !PIC_OBJECT_P (abfd)
8328 && MIPS_ELF_READONLY_SECTION (sec))))
8329 && (sec->flags & SEC_ALLOC) != 0)
8331 can_make_dynamic_p = TRUE;
8333 elf_hash_table (info)->dynobj = dynobj = abfd;
8339 case R_MIPS_PC21_S2:
8340 case R_MIPS_PC26_S2:
8342 case R_MICROMIPS_26_S1:
8343 case R_MICROMIPS_PC7_S1:
8344 case R_MICROMIPS_PC10_S1:
8345 case R_MICROMIPS_PC16_S1:
8346 case R_MICROMIPS_PC23_S2:
8347 call_reloc_p = TRUE;
8353 if (constrain_symbol_p)
8355 if (!can_make_dynamic_p)
8356 ((struct mips_elf_link_hash_entry *) h)->has_static_relocs = 1;
8359 h->pointer_equality_needed = 1;
8361 /* We must not create a stub for a symbol that has
8362 relocations related to taking the function's address.
8363 This doesn't apply to VxWorks, where CALL relocs refer
8364 to a .got.plt entry instead of a normal .got entry. */
8365 if (!htab->is_vxworks && (!can_make_dynamic_p || !call_reloc_p))
8366 ((struct mips_elf_link_hash_entry *) h)->no_fn_stub = TRUE;
8369 /* Relocations against the special VxWorks __GOTT_BASE__ and
8370 __GOTT_INDEX__ symbols must be left to the loader. Allocate
8371 room for them in .rela.dyn. */
8372 if (is_gott_symbol (info, h))
8376 sreloc = mips_elf_rel_dyn_section (info, TRUE);
8380 mips_elf_allocate_dynamic_relocations (dynobj, info, 1);
8381 if (MIPS_ELF_READONLY_SECTION (sec))
8382 /* We tell the dynamic linker that there are
8383 relocations against the text segment. */
8384 info->flags |= DF_TEXTREL;
8387 else if (call_lo16_reloc_p (r_type)
8388 || got_lo16_reloc_p (r_type)
8389 || got_disp_reloc_p (r_type)
8390 || (got16_reloc_p (r_type) && htab->is_vxworks))
8392 /* We may need a local GOT entry for this relocation. We
8393 don't count R_MIPS_GOT_PAGE because we can estimate the
8394 maximum number of pages needed by looking at the size of
8395 the segment. Similar comments apply to R_MIPS*_GOT16 and
8396 R_MIPS*_CALL16, except on VxWorks, where GOT relocations
8397 always evaluate to "G". We don't count R_MIPS_GOT_HI16, or
8398 R_MIPS_CALL_HI16 because these are always followed by an
8399 R_MIPS_GOT_LO16 or R_MIPS_CALL_LO16. */
8400 if (!mips_elf_record_local_got_symbol (abfd, r_symndx,
8401 rel->r_addend, info, r_type))
8406 && mips_elf_relocation_needs_la25_stub (abfd, r_type,
8407 ELF_ST_IS_MIPS16 (h->other)))
8408 ((struct mips_elf_link_hash_entry *) h)->has_nonpic_branches = TRUE;
8413 case R_MIPS16_CALL16:
8414 case R_MICROMIPS_CALL16:
8417 (*_bfd_error_handler)
8418 (_("%B: CALL16 reloc at 0x%lx not against global symbol"),
8419 abfd, (unsigned long) rel->r_offset);
8420 bfd_set_error (bfd_error_bad_value);
8425 case R_MIPS_CALL_HI16:
8426 case R_MIPS_CALL_LO16:
8427 case R_MICROMIPS_CALL_HI16:
8428 case R_MICROMIPS_CALL_LO16:
8431 /* Make sure there is room in the regular GOT to hold the
8432 function's address. We may eliminate it in favour of
8433 a .got.plt entry later; see mips_elf_count_got_symbols. */
8434 if (!mips_elf_record_global_got_symbol (h, abfd, info, TRUE,
8438 /* We need a stub, not a plt entry for the undefined
8439 function. But we record it as if it needs plt. See
8440 _bfd_elf_adjust_dynamic_symbol. */
8446 case R_MIPS_GOT_PAGE:
8447 case R_MICROMIPS_GOT_PAGE:
8448 case R_MIPS16_GOT16:
8450 case R_MIPS_GOT_HI16:
8451 case R_MIPS_GOT_LO16:
8452 case R_MICROMIPS_GOT16:
8453 case R_MICROMIPS_GOT_HI16:
8454 case R_MICROMIPS_GOT_LO16:
8455 if (!h || got_page_reloc_p (r_type))
8457 /* This relocation needs (or may need, if h != NULL) a
8458 page entry in the GOT. For R_MIPS_GOT_PAGE we do not
8459 know for sure until we know whether the symbol is
8461 if (mips_elf_rel_relocation_p (abfd, sec, relocs, rel))
8463 if (!mips_elf_get_section_contents (abfd, sec, &contents))
8465 howto = MIPS_ELF_RTYPE_TO_HOWTO (abfd, r_type, FALSE);
8466 addend = mips_elf_read_rel_addend (abfd, rel,
8468 if (got16_reloc_p (r_type))
8469 mips_elf_add_lo16_rel_addend (abfd, rel, rel_end,
8472 addend <<= howto->rightshift;
8475 addend = rel->r_addend;
8476 if (!mips_elf_record_got_page_ref (info, abfd, r_symndx,
8482 struct mips_elf_link_hash_entry *hmips =
8483 (struct mips_elf_link_hash_entry *) h;
8485 /* This symbol is definitely not overridable. */
8486 if (hmips->root.def_regular
8487 && ! (bfd_link_pic (info) && ! info->symbolic
8488 && ! hmips->root.forced_local))
8492 /* If this is a global, overridable symbol, GOT_PAGE will
8493 decay to GOT_DISP, so we'll need a GOT entry for it. */
8496 case R_MIPS_GOT_DISP:
8497 case R_MICROMIPS_GOT_DISP:
8498 if (h && !mips_elf_record_global_got_symbol (h, abfd, info,
8503 case R_MIPS_TLS_GOTTPREL:
8504 case R_MIPS16_TLS_GOTTPREL:
8505 case R_MICROMIPS_TLS_GOTTPREL:
8506 if (bfd_link_pic (info))
8507 info->flags |= DF_STATIC_TLS;
8510 case R_MIPS_TLS_LDM:
8511 case R_MIPS16_TLS_LDM:
8512 case R_MICROMIPS_TLS_LDM:
8513 if (tls_ldm_reloc_p (r_type))
8515 r_symndx = STN_UNDEF;
8521 case R_MIPS16_TLS_GD:
8522 case R_MICROMIPS_TLS_GD:
8523 /* This symbol requires a global offset table entry, or two
8524 for TLS GD relocations. */
8527 if (!mips_elf_record_global_got_symbol (h, abfd, info,
8533 if (!mips_elf_record_local_got_symbol (abfd, r_symndx,
8543 /* In VxWorks executables, references to external symbols
8544 are handled using copy relocs or PLT stubs, so there's
8545 no need to add a .rela.dyn entry for this relocation. */
8546 if (can_make_dynamic_p)
8550 sreloc = mips_elf_rel_dyn_section (info, TRUE);
8554 if (bfd_link_pic (info) && h == NULL)
8556 /* When creating a shared object, we must copy these
8557 reloc types into the output file as R_MIPS_REL32
8558 relocs. Make room for this reloc in .rel(a).dyn. */
8559 mips_elf_allocate_dynamic_relocations (dynobj, info, 1);
8560 if (MIPS_ELF_READONLY_SECTION (sec))
8561 /* We tell the dynamic linker that there are
8562 relocations against the text segment. */
8563 info->flags |= DF_TEXTREL;
8567 struct mips_elf_link_hash_entry *hmips;
8569 /* For a shared object, we must copy this relocation
8570 unless the symbol turns out to be undefined and
8571 weak with non-default visibility, in which case
8572 it will be left as zero.
8574 We could elide R_MIPS_REL32 for locally binding symbols
8575 in shared libraries, but do not yet do so.
8577 For an executable, we only need to copy this
8578 reloc if the symbol is defined in a dynamic
8580 hmips = (struct mips_elf_link_hash_entry *) h;
8581 ++hmips->possibly_dynamic_relocs;
8582 if (MIPS_ELF_READONLY_SECTION (sec))
8583 /* We need it to tell the dynamic linker if there
8584 are relocations against the text segment. */
8585 hmips->readonly_reloc = TRUE;
8589 if (SGI_COMPAT (abfd))
8590 mips_elf_hash_table (info)->compact_rel_size +=
8591 sizeof (Elf32_External_crinfo);
8595 case R_MIPS_GPREL16:
8596 case R_MIPS_LITERAL:
8597 case R_MIPS_GPREL32:
8598 case R_MICROMIPS_26_S1:
8599 case R_MICROMIPS_GPREL16:
8600 case R_MICROMIPS_LITERAL:
8601 case R_MICROMIPS_GPREL7_S2:
8602 if (SGI_COMPAT (abfd))
8603 mips_elf_hash_table (info)->compact_rel_size +=
8604 sizeof (Elf32_External_crinfo);
8607 /* This relocation describes the C++ object vtable hierarchy.
8608 Reconstruct it for later use during GC. */
8609 case R_MIPS_GNU_VTINHERIT:
8610 if (!bfd_elf_gc_record_vtinherit (abfd, sec, h, rel->r_offset))
8614 /* This relocation describes which C++ vtable entries are actually
8615 used. Record for later use during GC. */
8616 case R_MIPS_GNU_VTENTRY:
8617 BFD_ASSERT (h != NULL);
8619 && !bfd_elf_gc_record_vtentry (abfd, sec, h, rel->r_offset))
8627 /* Record the need for a PLT entry. At this point we don't know
8628 yet if we are going to create a PLT in the first place, but
8629 we only record whether the relocation requires a standard MIPS
8630 or a compressed code entry anyway. If we don't make a PLT after
8631 all, then we'll just ignore these arrangements. Likewise if
8632 a PLT entry is not created because the symbol is satisfied
8635 && jal_reloc_p (r_type)
8636 && !SYMBOL_CALLS_LOCAL (info, h))
8638 if (h->plt.plist == NULL)
8639 h->plt.plist = mips_elf_make_plt_record (abfd);
8640 if (h->plt.plist == NULL)
8643 if (r_type == R_MIPS_26)
8644 h->plt.plist->need_mips = TRUE;
8646 h->plt.plist->need_comp = TRUE;
8649 /* See if this reloc would need to refer to a MIPS16 hard-float stub,
8650 if there is one. We only need to handle global symbols here;
8651 we decide whether to keep or delete stubs for local symbols
8652 when processing the stub's relocations. */
8654 && !mips16_call_reloc_p (r_type)
8655 && !section_allows_mips16_refs_p (sec))
8657 struct mips_elf_link_hash_entry *mh;
8659 mh = (struct mips_elf_link_hash_entry *) h;
8660 mh->need_fn_stub = TRUE;
8663 /* Refuse some position-dependent relocations when creating a
8664 shared library. Do not refuse R_MIPS_32 / R_MIPS_64; they're
8665 not PIC, but we can create dynamic relocations and the result
8666 will be fine. Also do not refuse R_MIPS_LO16, which can be
8667 combined with R_MIPS_GOT16. */
8668 if (bfd_link_pic (info))
8675 case R_MIPS_HIGHEST:
8676 case R_MICROMIPS_HI16:
8677 case R_MICROMIPS_HIGHER:
8678 case R_MICROMIPS_HIGHEST:
8679 /* Don't refuse a high part relocation if it's against
8680 no symbol (e.g. part of a compound relocation). */
8681 if (r_symndx == STN_UNDEF)
8684 /* R_MIPS_HI16 against _gp_disp is used for $gp setup,
8685 and has a special meaning. */
8686 if (!NEWABI_P (abfd) && h != NULL
8687 && strcmp (h->root.root.string, "_gp_disp") == 0)
8690 /* Likewise __GOTT_BASE__ and __GOTT_INDEX__ on VxWorks. */
8691 if (is_gott_symbol (info, h))
8698 case R_MICROMIPS_26_S1:
8699 howto = MIPS_ELF_RTYPE_TO_HOWTO (abfd, r_type, FALSE);
8700 (*_bfd_error_handler)
8701 (_("%B: relocation %s against `%s' can not be used when making a shared object; recompile with -fPIC"),
8703 (h) ? h->root.root.string : "a local symbol");
8704 bfd_set_error (bfd_error_bad_value);
8716 _bfd_mips_relax_section (bfd *abfd, asection *sec,
8717 struct bfd_link_info *link_info,
8720 Elf_Internal_Rela *internal_relocs;
8721 Elf_Internal_Rela *irel, *irelend;
8722 Elf_Internal_Shdr *symtab_hdr;
8723 bfd_byte *contents = NULL;
8725 bfd_boolean changed_contents = FALSE;
8726 bfd_vma sec_start = sec->output_section->vma + sec->output_offset;
8727 Elf_Internal_Sym *isymbuf = NULL;
8729 /* We are not currently changing any sizes, so only one pass. */
8732 if (bfd_link_relocatable (link_info))
8735 internal_relocs = _bfd_elf_link_read_relocs (abfd, sec, NULL, NULL,
8736 link_info->keep_memory);
8737 if (internal_relocs == NULL)
8740 irelend = internal_relocs + sec->reloc_count
8741 * get_elf_backend_data (abfd)->s->int_rels_per_ext_rel;
8742 symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
8743 extsymoff = (elf_bad_symtab (abfd)) ? 0 : symtab_hdr->sh_info;
8745 for (irel = internal_relocs; irel < irelend; irel++)
8748 bfd_signed_vma sym_offset;
8749 unsigned int r_type;
8750 unsigned long r_symndx;
8752 unsigned long instruction;
8754 /* Turn jalr into bgezal, and jr into beq, if they're marked
8755 with a JALR relocation, that indicate where they jump to.
8756 This saves some pipeline bubbles. */
8757 r_type = ELF_R_TYPE (abfd, irel->r_info);
8758 if (r_type != R_MIPS_JALR)
8761 r_symndx = ELF_R_SYM (abfd, irel->r_info);
8762 /* Compute the address of the jump target. */
8763 if (r_symndx >= extsymoff)
8765 struct mips_elf_link_hash_entry *h
8766 = ((struct mips_elf_link_hash_entry *)
8767 elf_sym_hashes (abfd) [r_symndx - extsymoff]);
8769 while (h->root.root.type == bfd_link_hash_indirect
8770 || h->root.root.type == bfd_link_hash_warning)
8771 h = (struct mips_elf_link_hash_entry *) h->root.root.u.i.link;
8773 /* If a symbol is undefined, or if it may be overridden,
8775 if (! ((h->root.root.type == bfd_link_hash_defined
8776 || h->root.root.type == bfd_link_hash_defweak)
8777 && h->root.root.u.def.section)
8778 || (bfd_link_pic (link_info) && ! link_info->symbolic
8779 && !h->root.forced_local))
8782 sym_sec = h->root.root.u.def.section;
8783 if (sym_sec->output_section)
8784 symval = (h->root.root.u.def.value
8785 + sym_sec->output_section->vma
8786 + sym_sec->output_offset);
8788 symval = h->root.root.u.def.value;
8792 Elf_Internal_Sym *isym;
8794 /* Read this BFD's symbols if we haven't done so already. */
8795 if (isymbuf == NULL && symtab_hdr->sh_info != 0)
8797 isymbuf = (Elf_Internal_Sym *) symtab_hdr->contents;
8798 if (isymbuf == NULL)
8799 isymbuf = bfd_elf_get_elf_syms (abfd, symtab_hdr,
8800 symtab_hdr->sh_info, 0,
8802 if (isymbuf == NULL)
8806 isym = isymbuf + r_symndx;
8807 if (isym->st_shndx == SHN_UNDEF)
8809 else if (isym->st_shndx == SHN_ABS)
8810 sym_sec = bfd_abs_section_ptr;
8811 else if (isym->st_shndx == SHN_COMMON)
8812 sym_sec = bfd_com_section_ptr;
8815 = bfd_section_from_elf_index (abfd, isym->st_shndx);
8816 symval = isym->st_value
8817 + sym_sec->output_section->vma
8818 + sym_sec->output_offset;
8821 /* Compute branch offset, from delay slot of the jump to the
8823 sym_offset = (symval + irel->r_addend)
8824 - (sec_start + irel->r_offset + 4);
8826 /* Branch offset must be properly aligned. */
8827 if ((sym_offset & 3) != 0)
8832 /* Check that it's in range. */
8833 if (sym_offset < -0x8000 || sym_offset >= 0x8000)
8836 /* Get the section contents if we haven't done so already. */
8837 if (!mips_elf_get_section_contents (abfd, sec, &contents))
8840 instruction = bfd_get_32 (abfd, contents + irel->r_offset);
8842 /* If it was jalr <reg>, turn it into bgezal $zero, <target>. */
8843 if ((instruction & 0xfc1fffff) == 0x0000f809)
8844 instruction = 0x04110000;
8845 /* If it was jr <reg>, turn it into b <target>. */
8846 else if ((instruction & 0xfc1fffff) == 0x00000008)
8847 instruction = 0x10000000;
8851 instruction |= (sym_offset & 0xffff);
8852 bfd_put_32 (abfd, instruction, contents + irel->r_offset);
8853 changed_contents = TRUE;
8856 if (contents != NULL
8857 && elf_section_data (sec)->this_hdr.contents != contents)
8859 if (!changed_contents && !link_info->keep_memory)
8863 /* Cache the section contents for elf_link_input_bfd. */
8864 elf_section_data (sec)->this_hdr.contents = contents;
8870 if (contents != NULL
8871 && elf_section_data (sec)->this_hdr.contents != contents)
8876 /* Allocate space for global sym dynamic relocs. */
8879 allocate_dynrelocs (struct elf_link_hash_entry *h, void *inf)
8881 struct bfd_link_info *info = inf;
8883 struct mips_elf_link_hash_entry *hmips;
8884 struct mips_elf_link_hash_table *htab;
8886 htab = mips_elf_hash_table (info);
8887 BFD_ASSERT (htab != NULL);
8889 dynobj = elf_hash_table (info)->dynobj;
8890 hmips = (struct mips_elf_link_hash_entry *) h;
8892 /* VxWorks executables are handled elsewhere; we only need to
8893 allocate relocations in shared objects. */
8894 if (htab->is_vxworks && !bfd_link_pic (info))
8897 /* Ignore indirect symbols. All relocations against such symbols
8898 will be redirected to the target symbol. */
8899 if (h->root.type == bfd_link_hash_indirect)
8902 /* If this symbol is defined in a dynamic object, or we are creating
8903 a shared library, we will need to copy any R_MIPS_32 or
8904 R_MIPS_REL32 relocs against it into the output file. */
8905 if (! bfd_link_relocatable (info)
8906 && hmips->possibly_dynamic_relocs != 0
8907 && (h->root.type == bfd_link_hash_defweak
8908 || (!h->def_regular && !ELF_COMMON_DEF_P (h))
8909 || bfd_link_pic (info)))
8911 bfd_boolean do_copy = TRUE;
8913 if (h->root.type == bfd_link_hash_undefweak)
8915 /* Do not copy relocations for undefined weak symbols with
8916 non-default visibility. */
8917 if (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT)
8920 /* Make sure undefined weak symbols are output as a dynamic
8922 else if (h->dynindx == -1 && !h->forced_local)
8924 if (! bfd_elf_link_record_dynamic_symbol (info, h))
8931 /* Even though we don't directly need a GOT entry for this symbol,
8932 the SVR4 psABI requires it to have a dynamic symbol table
8933 index greater that DT_MIPS_GOTSYM if there are dynamic
8934 relocations against it.
8936 VxWorks does not enforce the same mapping between the GOT
8937 and the symbol table, so the same requirement does not
8939 if (!htab->is_vxworks)
8941 if (hmips->global_got_area > GGA_RELOC_ONLY)
8942 hmips->global_got_area = GGA_RELOC_ONLY;
8943 hmips->got_only_for_calls = FALSE;
8946 mips_elf_allocate_dynamic_relocations
8947 (dynobj, info, hmips->possibly_dynamic_relocs);
8948 if (hmips->readonly_reloc)
8949 /* We tell the dynamic linker that there are relocations
8950 against the text segment. */
8951 info->flags |= DF_TEXTREL;
8958 /* Adjust a symbol defined by a dynamic object and referenced by a
8959 regular object. The current definition is in some section of the
8960 dynamic object, but we're not including those sections. We have to
8961 change the definition to something the rest of the link can
8965 _bfd_mips_elf_adjust_dynamic_symbol (struct bfd_link_info *info,
8966 struct elf_link_hash_entry *h)
8969 struct mips_elf_link_hash_entry *hmips;
8970 struct mips_elf_link_hash_table *htab;
8972 htab = mips_elf_hash_table (info);
8973 BFD_ASSERT (htab != NULL);
8975 dynobj = elf_hash_table (info)->dynobj;
8976 hmips = (struct mips_elf_link_hash_entry *) h;
8978 /* Make sure we know what is going on here. */
8979 BFD_ASSERT (dynobj != NULL
8981 || h->u.weakdef != NULL
8984 && !h->def_regular)));
8986 hmips = (struct mips_elf_link_hash_entry *) h;
8988 /* If there are call relocations against an externally-defined symbol,
8989 see whether we can create a MIPS lazy-binding stub for it. We can
8990 only do this if all references to the function are through call
8991 relocations, and in that case, the traditional lazy-binding stubs
8992 are much more efficient than PLT entries.
8994 Traditional stubs are only available on SVR4 psABI-based systems;
8995 VxWorks always uses PLTs instead. */
8996 if (!htab->is_vxworks && h->needs_plt && !hmips->no_fn_stub)
8998 if (! elf_hash_table (info)->dynamic_sections_created)
9001 /* If this symbol is not defined in a regular file, then set
9002 the symbol to the stub location. This is required to make
9003 function pointers compare as equal between the normal
9004 executable and the shared library. */
9005 if (!h->def_regular)
9007 hmips->needs_lazy_stub = TRUE;
9008 htab->lazy_stub_count++;
9012 /* As above, VxWorks requires PLT entries for externally-defined
9013 functions that are only accessed through call relocations.
9015 Both VxWorks and non-VxWorks targets also need PLT entries if there
9016 are static-only relocations against an externally-defined function.
9017 This can technically occur for shared libraries if there are
9018 branches to the symbol, although it is unlikely that this will be
9019 used in practice due to the short ranges involved. It can occur
9020 for any relative or absolute relocation in executables; in that
9021 case, the PLT entry becomes the function's canonical address. */
9022 else if (((h->needs_plt && !hmips->no_fn_stub)
9023 || (h->type == STT_FUNC && hmips->has_static_relocs))
9024 && htab->use_plts_and_copy_relocs
9025 && !SYMBOL_CALLS_LOCAL (info, h)
9026 && !(ELF_ST_VISIBILITY (h->other) != STV_DEFAULT
9027 && h->root.type == bfd_link_hash_undefweak))
9029 bfd_boolean micromips_p = MICROMIPS_P (info->output_bfd);
9030 bfd_boolean newabi_p = NEWABI_P (info->output_bfd);
9032 /* If this is the first symbol to need a PLT entry, then make some
9033 basic setup. Also work out PLT entry sizes. We'll need them
9034 for PLT offset calculations. */
9035 if (htab->plt_mips_offset + htab->plt_comp_offset == 0)
9037 BFD_ASSERT (htab->sgotplt->size == 0);
9038 BFD_ASSERT (htab->plt_got_index == 0);
9040 /* If we're using the PLT additions to the psABI, each PLT
9041 entry is 16 bytes and the PLT0 entry is 32 bytes.
9042 Encourage better cache usage by aligning. We do this
9043 lazily to avoid pessimizing traditional objects. */
9044 if (!htab->is_vxworks
9045 && !bfd_set_section_alignment (dynobj, htab->splt, 5))
9048 /* Make sure that .got.plt is word-aligned. We do this lazily
9049 for the same reason as above. */
9050 if (!bfd_set_section_alignment (dynobj, htab->sgotplt,
9051 MIPS_ELF_LOG_FILE_ALIGN (dynobj)))
9054 /* On non-VxWorks targets, the first two entries in .got.plt
9056 if (!htab->is_vxworks)
9058 += (get_elf_backend_data (dynobj)->got_header_size
9059 / MIPS_ELF_GOT_SIZE (dynobj));
9061 /* On VxWorks, also allocate room for the header's
9062 .rela.plt.unloaded entries. */
9063 if (htab->is_vxworks && !bfd_link_pic (info))
9064 htab->srelplt2->size += 2 * sizeof (Elf32_External_Rela);
9066 /* Now work out the sizes of individual PLT entries. */
9067 if (htab->is_vxworks && bfd_link_pic (info))
9068 htab->plt_mips_entry_size
9069 = 4 * ARRAY_SIZE (mips_vxworks_shared_plt_entry);
9070 else if (htab->is_vxworks)
9071 htab->plt_mips_entry_size
9072 = 4 * ARRAY_SIZE (mips_vxworks_exec_plt_entry);
9074 htab->plt_mips_entry_size
9075 = 4 * ARRAY_SIZE (mips_exec_plt_entry);
9076 else if (!micromips_p)
9078 htab->plt_mips_entry_size
9079 = 4 * ARRAY_SIZE (mips_exec_plt_entry);
9080 htab->plt_comp_entry_size
9081 = 2 * ARRAY_SIZE (mips16_o32_exec_plt_entry);
9083 else if (htab->insn32)
9085 htab->plt_mips_entry_size
9086 = 4 * ARRAY_SIZE (mips_exec_plt_entry);
9087 htab->plt_comp_entry_size
9088 = 2 * ARRAY_SIZE (micromips_insn32_o32_exec_plt_entry);
9092 htab->plt_mips_entry_size
9093 = 4 * ARRAY_SIZE (mips_exec_plt_entry);
9094 htab->plt_comp_entry_size
9095 = 2 * ARRAY_SIZE (micromips_o32_exec_plt_entry);
9099 if (h->plt.plist == NULL)
9100 h->plt.plist = mips_elf_make_plt_record (dynobj);
9101 if (h->plt.plist == NULL)
9104 /* There are no defined MIPS16 or microMIPS PLT entries for VxWorks,
9105 n32 or n64, so always use a standard entry there.
9107 If the symbol has a MIPS16 call stub and gets a PLT entry, then
9108 all MIPS16 calls will go via that stub, and there is no benefit
9109 to having a MIPS16 entry. And in the case of call_stub a
9110 standard entry actually has to be used as the stub ends with a J
9115 || hmips->call_fp_stub)
9117 h->plt.plist->need_mips = TRUE;
9118 h->plt.plist->need_comp = FALSE;
9121 /* Otherwise, if there are no direct calls to the function, we
9122 have a free choice of whether to use standard or compressed
9123 entries. Prefer microMIPS entries if the object is known to
9124 contain microMIPS code, so that it becomes possible to create
9125 pure microMIPS binaries. Prefer standard entries otherwise,
9126 because MIPS16 ones are no smaller and are usually slower. */
9127 if (!h->plt.plist->need_mips && !h->plt.plist->need_comp)
9130 h->plt.plist->need_comp = TRUE;
9132 h->plt.plist->need_mips = TRUE;
9135 if (h->plt.plist->need_mips)
9137 h->plt.plist->mips_offset = htab->plt_mips_offset;
9138 htab->plt_mips_offset += htab->plt_mips_entry_size;
9140 if (h->plt.plist->need_comp)
9142 h->plt.plist->comp_offset = htab->plt_comp_offset;
9143 htab->plt_comp_offset += htab->plt_comp_entry_size;
9146 /* Reserve the corresponding .got.plt entry now too. */
9147 h->plt.plist->gotplt_index = htab->plt_got_index++;
9149 /* If the output file has no definition of the symbol, set the
9150 symbol's value to the address of the stub. */
9151 if (!bfd_link_pic (info) && !h->def_regular)
9152 hmips->use_plt_entry = TRUE;
9154 /* Make room for the R_MIPS_JUMP_SLOT relocation. */
9155 htab->srelplt->size += (htab->is_vxworks
9156 ? MIPS_ELF_RELA_SIZE (dynobj)
9157 : MIPS_ELF_REL_SIZE (dynobj));
9159 /* Make room for the .rela.plt.unloaded relocations. */
9160 if (htab->is_vxworks && !bfd_link_pic (info))
9161 htab->srelplt2->size += 3 * sizeof (Elf32_External_Rela);
9163 /* All relocations against this symbol that could have been made
9164 dynamic will now refer to the PLT entry instead. */
9165 hmips->possibly_dynamic_relocs = 0;
9170 /* If this is a weak symbol, and there is a real definition, the
9171 processor independent code will have arranged for us to see the
9172 real definition first, and we can just use the same value. */
9173 if (h->u.weakdef != NULL)
9175 BFD_ASSERT (h->u.weakdef->root.type == bfd_link_hash_defined
9176 || h->u.weakdef->root.type == bfd_link_hash_defweak);
9177 h->root.u.def.section = h->u.weakdef->root.u.def.section;
9178 h->root.u.def.value = h->u.weakdef->root.u.def.value;
9182 /* Otherwise, there is nothing further to do for symbols defined
9183 in regular objects. */
9187 /* There's also nothing more to do if we'll convert all relocations
9188 against this symbol into dynamic relocations. */
9189 if (!hmips->has_static_relocs)
9192 /* We're now relying on copy relocations. Complain if we have
9193 some that we can't convert. */
9194 if (!htab->use_plts_and_copy_relocs || bfd_link_pic (info))
9196 (*_bfd_error_handler) (_("non-dynamic relocations refer to "
9197 "dynamic symbol %s"),
9198 h->root.root.string);
9199 bfd_set_error (bfd_error_bad_value);
9203 /* We must allocate the symbol in our .dynbss section, which will
9204 become part of the .bss section of the executable. There will be
9205 an entry for this symbol in the .dynsym section. The dynamic
9206 object will contain position independent code, so all references
9207 from the dynamic object to this symbol will go through the global
9208 offset table. The dynamic linker will use the .dynsym entry to
9209 determine the address it must put in the global offset table, so
9210 both the dynamic object and the regular object will refer to the
9211 same memory location for the variable. */
9213 if ((h->root.u.def.section->flags & SEC_ALLOC) != 0)
9215 if (htab->is_vxworks)
9216 htab->srelbss->size += sizeof (Elf32_External_Rela);
9218 mips_elf_allocate_dynamic_relocations (dynobj, info, 1);
9222 /* All relocations against this symbol that could have been made
9223 dynamic will now refer to the local copy instead. */
9224 hmips->possibly_dynamic_relocs = 0;
9226 return _bfd_elf_adjust_dynamic_copy (info, h, htab->sdynbss);
9229 /* This function is called after all the input files have been read,
9230 and the input sections have been assigned to output sections. We
9231 check for any mips16 stub sections that we can discard. */
9234 _bfd_mips_elf_always_size_sections (bfd *output_bfd,
9235 struct bfd_link_info *info)
9238 struct mips_elf_link_hash_table *htab;
9239 struct mips_htab_traverse_info hti;
9241 htab = mips_elf_hash_table (info);
9242 BFD_ASSERT (htab != NULL);
9244 /* The .reginfo section has a fixed size. */
9245 sect = bfd_get_section_by_name (output_bfd, ".reginfo");
9247 bfd_set_section_size (output_bfd, sect, sizeof (Elf32_External_RegInfo));
9249 /* The .MIPS.abiflags section has a fixed size. */
9250 sect = bfd_get_section_by_name (output_bfd, ".MIPS.abiflags");
9252 bfd_set_section_size (output_bfd, sect, sizeof (Elf_External_ABIFlags_v0));
9255 hti.output_bfd = output_bfd;
9257 mips_elf_link_hash_traverse (mips_elf_hash_table (info),
9258 mips_elf_check_symbols, &hti);
9265 /* If the link uses a GOT, lay it out and work out its size. */
9268 mips_elf_lay_out_got (bfd *output_bfd, struct bfd_link_info *info)
9272 struct mips_got_info *g;
9273 bfd_size_type loadable_size = 0;
9274 bfd_size_type page_gotno;
9276 struct mips_elf_traverse_got_arg tga;
9277 struct mips_elf_link_hash_table *htab;
9279 htab = mips_elf_hash_table (info);
9280 BFD_ASSERT (htab != NULL);
9286 dynobj = elf_hash_table (info)->dynobj;
9289 /* Allocate room for the reserved entries. VxWorks always reserves
9290 3 entries; other objects only reserve 2 entries. */
9291 BFD_ASSERT (g->assigned_low_gotno == 0);
9292 if (htab->is_vxworks)
9293 htab->reserved_gotno = 3;
9295 htab->reserved_gotno = 2;
9296 g->local_gotno += htab->reserved_gotno;
9297 g->assigned_low_gotno = htab->reserved_gotno;
9299 /* Decide which symbols need to go in the global part of the GOT and
9300 count the number of reloc-only GOT symbols. */
9301 mips_elf_link_hash_traverse (htab, mips_elf_count_got_symbols, info);
9303 if (!mips_elf_resolve_final_got_entries (info, g))
9306 /* Calculate the total loadable size of the output. That
9307 will give us the maximum number of GOT_PAGE entries
9309 for (ibfd = info->input_bfds; ibfd; ibfd = ibfd->link.next)
9311 asection *subsection;
9313 for (subsection = ibfd->sections;
9315 subsection = subsection->next)
9317 if ((subsection->flags & SEC_ALLOC) == 0)
9319 loadable_size += ((subsection->size + 0xf)
9320 &~ (bfd_size_type) 0xf);
9324 if (htab->is_vxworks)
9325 /* There's no need to allocate page entries for VxWorks; R_MIPS*_GOT16
9326 relocations against local symbols evaluate to "G", and the EABI does
9327 not include R_MIPS_GOT_PAGE. */
9330 /* Assume there are two loadable segments consisting of contiguous
9331 sections. Is 5 enough? */
9332 page_gotno = (loadable_size >> 16) + 5;
9334 /* Choose the smaller of the two page estimates; both are intended to be
9336 if (page_gotno > g->page_gotno)
9337 page_gotno = g->page_gotno;
9339 g->local_gotno += page_gotno;
9340 g->assigned_high_gotno = g->local_gotno - 1;
9342 s->size += g->local_gotno * MIPS_ELF_GOT_SIZE (output_bfd);
9343 s->size += g->global_gotno * MIPS_ELF_GOT_SIZE (output_bfd);
9344 s->size += g->tls_gotno * MIPS_ELF_GOT_SIZE (output_bfd);
9346 /* VxWorks does not support multiple GOTs. It initializes $gp to
9347 __GOTT_BASE__[__GOTT_INDEX__], the value of which is set by the
9349 if (!htab->is_vxworks && s->size > MIPS_ELF_GOT_MAX_SIZE (info))
9351 if (!mips_elf_multi_got (output_bfd, info, s, page_gotno))
9356 /* Record that all bfds use G. This also has the effect of freeing
9357 the per-bfd GOTs, which we no longer need. */
9358 for (ibfd = info->input_bfds; ibfd; ibfd = ibfd->link.next)
9359 if (mips_elf_bfd_got (ibfd, FALSE))
9360 mips_elf_replace_bfd_got (ibfd, g);
9361 mips_elf_replace_bfd_got (output_bfd, g);
9363 /* Set up TLS entries. */
9364 g->tls_assigned_gotno = g->global_gotno + g->local_gotno;
9367 tga.value = MIPS_ELF_GOT_SIZE (output_bfd);
9368 htab_traverse (g->got_entries, mips_elf_initialize_tls_index, &tga);
9371 BFD_ASSERT (g->tls_assigned_gotno
9372 == g->global_gotno + g->local_gotno + g->tls_gotno);
9374 /* Each VxWorks GOT entry needs an explicit relocation. */
9375 if (htab->is_vxworks && bfd_link_pic (info))
9376 g->relocs += g->global_gotno + g->local_gotno - htab->reserved_gotno;
9378 /* Allocate room for the TLS relocations. */
9380 mips_elf_allocate_dynamic_relocations (dynobj, info, g->relocs);
9386 /* Estimate the size of the .MIPS.stubs section. */
9389 mips_elf_estimate_stub_size (bfd *output_bfd, struct bfd_link_info *info)
9391 struct mips_elf_link_hash_table *htab;
9392 bfd_size_type dynsymcount;
9394 htab = mips_elf_hash_table (info);
9395 BFD_ASSERT (htab != NULL);
9397 if (htab->lazy_stub_count == 0)
9400 /* IRIX rld assumes that a function stub isn't at the end of the .text
9401 section, so add a dummy entry to the end. */
9402 htab->lazy_stub_count++;
9404 /* Get a worst-case estimate of the number of dynamic symbols needed.
9405 At this point, dynsymcount does not account for section symbols
9406 and count_section_dynsyms may overestimate the number that will
9408 dynsymcount = (elf_hash_table (info)->dynsymcount
9409 + count_section_dynsyms (output_bfd, info));
9411 /* Determine the size of one stub entry. There's no disadvantage
9412 from using microMIPS code here, so for the sake of pure-microMIPS
9413 binaries we prefer it whenever there's any microMIPS code in
9414 output produced at all. This has a benefit of stubs being
9415 shorter by 4 bytes each too, unless in the insn32 mode. */
9416 if (!MICROMIPS_P (output_bfd))
9417 htab->function_stub_size = (dynsymcount > 0x10000
9418 ? MIPS_FUNCTION_STUB_BIG_SIZE
9419 : MIPS_FUNCTION_STUB_NORMAL_SIZE);
9420 else if (htab->insn32)
9421 htab->function_stub_size = (dynsymcount > 0x10000
9422 ? MICROMIPS_INSN32_FUNCTION_STUB_BIG_SIZE
9423 : MICROMIPS_INSN32_FUNCTION_STUB_NORMAL_SIZE);
9425 htab->function_stub_size = (dynsymcount > 0x10000
9426 ? MICROMIPS_FUNCTION_STUB_BIG_SIZE
9427 : MICROMIPS_FUNCTION_STUB_NORMAL_SIZE);
9429 htab->sstubs->size = htab->lazy_stub_count * htab->function_stub_size;
9432 /* A mips_elf_link_hash_traverse callback for which DATA points to a
9433 mips_htab_traverse_info. If H needs a traditional MIPS lazy-binding
9434 stub, allocate an entry in the stubs section. */
9437 mips_elf_allocate_lazy_stub (struct mips_elf_link_hash_entry *h, void *data)
9439 struct mips_htab_traverse_info *hti = data;
9440 struct mips_elf_link_hash_table *htab;
9441 struct bfd_link_info *info;
9445 output_bfd = hti->output_bfd;
9446 htab = mips_elf_hash_table (info);
9447 BFD_ASSERT (htab != NULL);
9449 if (h->needs_lazy_stub)
9451 bfd_boolean micromips_p = MICROMIPS_P (output_bfd);
9452 unsigned int other = micromips_p ? STO_MICROMIPS : 0;
9453 bfd_vma isa_bit = micromips_p;
9455 BFD_ASSERT (htab->root.dynobj != NULL);
9456 if (h->root.plt.plist == NULL)
9457 h->root.plt.plist = mips_elf_make_plt_record (htab->sstubs->owner);
9458 if (h->root.plt.plist == NULL)
9463 h->root.root.u.def.section = htab->sstubs;
9464 h->root.root.u.def.value = htab->sstubs->size + isa_bit;
9465 h->root.plt.plist->stub_offset = htab->sstubs->size;
9466 h->root.other = other;
9467 htab->sstubs->size += htab->function_stub_size;
9472 /* Allocate offsets in the stubs section to each symbol that needs one.
9473 Set the final size of the .MIPS.stub section. */
9476 mips_elf_lay_out_lazy_stubs (struct bfd_link_info *info)
9478 bfd *output_bfd = info->output_bfd;
9479 bfd_boolean micromips_p = MICROMIPS_P (output_bfd);
9480 unsigned int other = micromips_p ? STO_MICROMIPS : 0;
9481 bfd_vma isa_bit = micromips_p;
9482 struct mips_elf_link_hash_table *htab;
9483 struct mips_htab_traverse_info hti;
9484 struct elf_link_hash_entry *h;
9487 htab = mips_elf_hash_table (info);
9488 BFD_ASSERT (htab != NULL);
9490 if (htab->lazy_stub_count == 0)
9493 htab->sstubs->size = 0;
9495 hti.output_bfd = output_bfd;
9497 mips_elf_link_hash_traverse (htab, mips_elf_allocate_lazy_stub, &hti);
9500 htab->sstubs->size += htab->function_stub_size;
9501 BFD_ASSERT (htab->sstubs->size
9502 == htab->lazy_stub_count * htab->function_stub_size);
9504 dynobj = elf_hash_table (info)->dynobj;
9505 BFD_ASSERT (dynobj != NULL);
9506 h = _bfd_elf_define_linkage_sym (dynobj, info, htab->sstubs, "_MIPS_STUBS_");
9509 h->root.u.def.value = isa_bit;
9516 /* A mips_elf_link_hash_traverse callback for which DATA points to a
9517 bfd_link_info. If H uses the address of a PLT entry as the value
9518 of the symbol, then set the entry in the symbol table now. Prefer
9519 a standard MIPS PLT entry. */
9522 mips_elf_set_plt_sym_value (struct mips_elf_link_hash_entry *h, void *data)
9524 struct bfd_link_info *info = data;
9525 bfd_boolean micromips_p = MICROMIPS_P (info->output_bfd);
9526 struct mips_elf_link_hash_table *htab;
9531 htab = mips_elf_hash_table (info);
9532 BFD_ASSERT (htab != NULL);
9534 if (h->use_plt_entry)
9536 BFD_ASSERT (h->root.plt.plist != NULL);
9537 BFD_ASSERT (h->root.plt.plist->mips_offset != MINUS_ONE
9538 || h->root.plt.plist->comp_offset != MINUS_ONE);
9540 val = htab->plt_header_size;
9541 if (h->root.plt.plist->mips_offset != MINUS_ONE)
9544 val += h->root.plt.plist->mips_offset;
9550 val += htab->plt_mips_offset + h->root.plt.plist->comp_offset;
9551 other = micromips_p ? STO_MICROMIPS : STO_MIPS16;
9554 /* For VxWorks, point at the PLT load stub rather than the lazy
9555 resolution stub; this stub will become the canonical function
9557 if (htab->is_vxworks)
9560 h->root.root.u.def.section = htab->splt;
9561 h->root.root.u.def.value = val;
9562 h->root.other = other;
9568 /* Set the sizes of the dynamic sections. */
9571 _bfd_mips_elf_size_dynamic_sections (bfd *output_bfd,
9572 struct bfd_link_info *info)
9575 asection *s, *sreldyn;
9576 bfd_boolean reltext;
9577 struct mips_elf_link_hash_table *htab;
9579 htab = mips_elf_hash_table (info);
9580 BFD_ASSERT (htab != NULL);
9581 dynobj = elf_hash_table (info)->dynobj;
9582 BFD_ASSERT (dynobj != NULL);
9584 if (elf_hash_table (info)->dynamic_sections_created)
9586 /* Set the contents of the .interp section to the interpreter. */
9587 if (bfd_link_executable (info) && !info->nointerp)
9589 s = bfd_get_linker_section (dynobj, ".interp");
9590 BFD_ASSERT (s != NULL);
9592 = strlen (ELF_DYNAMIC_INTERPRETER (output_bfd)) + 1;
9594 = (bfd_byte *) ELF_DYNAMIC_INTERPRETER (output_bfd);
9597 /* Figure out the size of the PLT header if we know that we
9598 are using it. For the sake of cache alignment always use
9599 a standard header whenever any standard entries are present
9600 even if microMIPS entries are present as well. This also
9601 lets the microMIPS header rely on the value of $v0 only set
9602 by microMIPS entries, for a small size reduction.
9604 Set symbol table entry values for symbols that use the
9605 address of their PLT entry now that we can calculate it.
9607 Also create the _PROCEDURE_LINKAGE_TABLE_ symbol if we
9608 haven't already in _bfd_elf_create_dynamic_sections. */
9609 if (htab->splt && htab->plt_mips_offset + htab->plt_comp_offset != 0)
9611 bfd_boolean micromips_p = (MICROMIPS_P (output_bfd)
9612 && !htab->plt_mips_offset);
9613 unsigned int other = micromips_p ? STO_MICROMIPS : 0;
9614 bfd_vma isa_bit = micromips_p;
9615 struct elf_link_hash_entry *h;
9618 BFD_ASSERT (htab->use_plts_and_copy_relocs);
9619 BFD_ASSERT (htab->sgotplt->size == 0);
9620 BFD_ASSERT (htab->splt->size == 0);
9622 if (htab->is_vxworks && bfd_link_pic (info))
9623 size = 4 * ARRAY_SIZE (mips_vxworks_shared_plt0_entry);
9624 else if (htab->is_vxworks)
9625 size = 4 * ARRAY_SIZE (mips_vxworks_exec_plt0_entry);
9626 else if (ABI_64_P (output_bfd))
9627 size = 4 * ARRAY_SIZE (mips_n64_exec_plt0_entry);
9628 else if (ABI_N32_P (output_bfd))
9629 size = 4 * ARRAY_SIZE (mips_n32_exec_plt0_entry);
9630 else if (!micromips_p)
9631 size = 4 * ARRAY_SIZE (mips_o32_exec_plt0_entry);
9632 else if (htab->insn32)
9633 size = 2 * ARRAY_SIZE (micromips_insn32_o32_exec_plt0_entry);
9635 size = 2 * ARRAY_SIZE (micromips_o32_exec_plt0_entry);
9637 htab->plt_header_is_comp = micromips_p;
9638 htab->plt_header_size = size;
9639 htab->splt->size = (size
9640 + htab->plt_mips_offset
9641 + htab->plt_comp_offset);
9642 htab->sgotplt->size = (htab->plt_got_index
9643 * MIPS_ELF_GOT_SIZE (dynobj));
9645 mips_elf_link_hash_traverse (htab, mips_elf_set_plt_sym_value, info);
9647 if (htab->root.hplt == NULL)
9649 h = _bfd_elf_define_linkage_sym (dynobj, info, htab->splt,
9650 "_PROCEDURE_LINKAGE_TABLE_");
9651 htab->root.hplt = h;
9656 h = htab->root.hplt;
9657 h->root.u.def.value = isa_bit;
9663 /* Allocate space for global sym dynamic relocs. */
9664 elf_link_hash_traverse (&htab->root, allocate_dynrelocs, info);
9666 mips_elf_estimate_stub_size (output_bfd, info);
9668 if (!mips_elf_lay_out_got (output_bfd, info))
9671 mips_elf_lay_out_lazy_stubs (info);
9673 /* The check_relocs and adjust_dynamic_symbol entry points have
9674 determined the sizes of the various dynamic sections. Allocate
9677 for (s = dynobj->sections; s != NULL; s = s->next)
9681 /* It's OK to base decisions on the section name, because none
9682 of the dynobj section names depend upon the input files. */
9683 name = bfd_get_section_name (dynobj, s);
9685 if ((s->flags & SEC_LINKER_CREATED) == 0)
9688 if (CONST_STRNEQ (name, ".rel"))
9692 const char *outname;
9695 /* If this relocation section applies to a read only
9696 section, then we probably need a DT_TEXTREL entry.
9697 If the relocation section is .rel(a).dyn, we always
9698 assert a DT_TEXTREL entry rather than testing whether
9699 there exists a relocation to a read only section or
9701 outname = bfd_get_section_name (output_bfd,
9703 target = bfd_get_section_by_name (output_bfd, outname + 4);
9705 && (target->flags & SEC_READONLY) != 0
9706 && (target->flags & SEC_ALLOC) != 0)
9707 || strcmp (outname, MIPS_ELF_REL_DYN_NAME (info)) == 0)
9710 /* We use the reloc_count field as a counter if we need
9711 to copy relocs into the output file. */
9712 if (strcmp (name, MIPS_ELF_REL_DYN_NAME (info)) != 0)
9715 /* If combreloc is enabled, elf_link_sort_relocs() will
9716 sort relocations, but in a different way than we do,
9717 and before we're done creating relocations. Also, it
9718 will move them around between input sections'
9719 relocation's contents, so our sorting would be
9720 broken, so don't let it run. */
9721 info->combreloc = 0;
9724 else if (bfd_link_executable (info)
9725 && ! mips_elf_hash_table (info)->use_rld_obj_head
9726 && CONST_STRNEQ (name, ".rld_map"))
9728 /* We add a room for __rld_map. It will be filled in by the
9729 rtld to contain a pointer to the _r_debug structure. */
9730 s->size += MIPS_ELF_RLD_MAP_SIZE (output_bfd);
9732 else if (SGI_COMPAT (output_bfd)
9733 && CONST_STRNEQ (name, ".compact_rel"))
9734 s->size += mips_elf_hash_table (info)->compact_rel_size;
9735 else if (s == htab->splt)
9737 /* If the last PLT entry has a branch delay slot, allocate
9738 room for an extra nop to fill the delay slot. This is
9739 for CPUs without load interlocking. */
9740 if (! LOAD_INTERLOCKS_P (output_bfd)
9741 && ! htab->is_vxworks && s->size > 0)
9744 else if (! CONST_STRNEQ (name, ".init")
9746 && s != htab->sgotplt
9747 && s != htab->sstubs
9748 && s != htab->sdynbss)
9750 /* It's not one of our sections, so don't allocate space. */
9756 s->flags |= SEC_EXCLUDE;
9760 if ((s->flags & SEC_HAS_CONTENTS) == 0)
9763 /* Allocate memory for the section contents. */
9764 s->contents = bfd_zalloc (dynobj, s->size);
9765 if (s->contents == NULL)
9767 bfd_set_error (bfd_error_no_memory);
9772 if (elf_hash_table (info)->dynamic_sections_created)
9774 /* Add some entries to the .dynamic section. We fill in the
9775 values later, in _bfd_mips_elf_finish_dynamic_sections, but we
9776 must add the entries now so that we get the correct size for
9777 the .dynamic section. */
9779 /* SGI object has the equivalence of DT_DEBUG in the
9780 DT_MIPS_RLD_MAP entry. This must come first because glibc
9781 only fills in DT_MIPS_RLD_MAP (not DT_DEBUG) and some tools
9782 may only look at the first one they see. */
9783 if (!bfd_link_pic (info)
9784 && !MIPS_ELF_ADD_DYNAMIC_ENTRY (info, DT_MIPS_RLD_MAP, 0))
9787 if (bfd_link_executable (info)
9788 && !MIPS_ELF_ADD_DYNAMIC_ENTRY (info, DT_MIPS_RLD_MAP_REL, 0))
9791 /* The DT_DEBUG entry may be filled in by the dynamic linker and
9792 used by the debugger. */
9793 if (bfd_link_executable (info)
9794 && !SGI_COMPAT (output_bfd)
9795 && !MIPS_ELF_ADD_DYNAMIC_ENTRY (info, DT_DEBUG, 0))
9798 if (reltext && (SGI_COMPAT (output_bfd) || htab->is_vxworks))
9799 info->flags |= DF_TEXTREL;
9801 if ((info->flags & DF_TEXTREL) != 0)
9803 if (! MIPS_ELF_ADD_DYNAMIC_ENTRY (info, DT_TEXTREL, 0))
9806 /* Clear the DF_TEXTREL flag. It will be set again if we
9807 write out an actual text relocation; we may not, because
9808 at this point we do not know whether e.g. any .eh_frame
9809 absolute relocations have been converted to PC-relative. */
9810 info->flags &= ~DF_TEXTREL;
9813 if (! MIPS_ELF_ADD_DYNAMIC_ENTRY (info, DT_PLTGOT, 0))
9816 sreldyn = mips_elf_rel_dyn_section (info, FALSE);
9817 if (htab->is_vxworks)
9819 /* VxWorks uses .rela.dyn instead of .rel.dyn. It does not
9820 use any of the DT_MIPS_* tags. */
9821 if (sreldyn && sreldyn->size > 0)
9823 if (! MIPS_ELF_ADD_DYNAMIC_ENTRY (info, DT_RELA, 0))
9826 if (! MIPS_ELF_ADD_DYNAMIC_ENTRY (info, DT_RELASZ, 0))
9829 if (! MIPS_ELF_ADD_DYNAMIC_ENTRY (info, DT_RELAENT, 0))
9835 if (sreldyn && sreldyn->size > 0)
9837 if (! MIPS_ELF_ADD_DYNAMIC_ENTRY (info, DT_REL, 0))
9840 if (! MIPS_ELF_ADD_DYNAMIC_ENTRY (info, DT_RELSZ, 0))
9843 if (! MIPS_ELF_ADD_DYNAMIC_ENTRY (info, DT_RELENT, 0))
9847 if (! MIPS_ELF_ADD_DYNAMIC_ENTRY (info, DT_MIPS_RLD_VERSION, 0))
9850 if (! MIPS_ELF_ADD_DYNAMIC_ENTRY (info, DT_MIPS_FLAGS, 0))
9853 if (! MIPS_ELF_ADD_DYNAMIC_ENTRY (info, DT_MIPS_BASE_ADDRESS, 0))
9856 if (! MIPS_ELF_ADD_DYNAMIC_ENTRY (info, DT_MIPS_LOCAL_GOTNO, 0))
9859 if (! MIPS_ELF_ADD_DYNAMIC_ENTRY (info, DT_MIPS_SYMTABNO, 0))
9862 if (! MIPS_ELF_ADD_DYNAMIC_ENTRY (info, DT_MIPS_UNREFEXTNO, 0))
9865 if (! MIPS_ELF_ADD_DYNAMIC_ENTRY (info, DT_MIPS_GOTSYM, 0))
9868 if (IRIX_COMPAT (dynobj) == ict_irix5
9869 && ! MIPS_ELF_ADD_DYNAMIC_ENTRY (info, DT_MIPS_HIPAGENO, 0))
9872 if (IRIX_COMPAT (dynobj) == ict_irix6
9873 && (bfd_get_section_by_name
9874 (output_bfd, MIPS_ELF_OPTIONS_SECTION_NAME (dynobj)))
9875 && !MIPS_ELF_ADD_DYNAMIC_ENTRY (info, DT_MIPS_OPTIONS, 0))
9878 if (htab->splt->size > 0)
9880 if (! MIPS_ELF_ADD_DYNAMIC_ENTRY (info, DT_PLTREL, 0))
9883 if (! MIPS_ELF_ADD_DYNAMIC_ENTRY (info, DT_JMPREL, 0))
9886 if (! MIPS_ELF_ADD_DYNAMIC_ENTRY (info, DT_PLTRELSZ, 0))
9889 if (! MIPS_ELF_ADD_DYNAMIC_ENTRY (info, DT_MIPS_PLTGOT, 0))
9892 if (htab->is_vxworks
9893 && !elf_vxworks_add_dynamic_entries (output_bfd, info))
9900 /* REL is a relocation in INPUT_BFD that is being copied to OUTPUT_BFD.
9901 Adjust its R_ADDEND field so that it is correct for the output file.
9902 LOCAL_SYMS and LOCAL_SECTIONS are arrays of INPUT_BFD's local symbols
9903 and sections respectively; both use symbol indexes. */
9906 mips_elf_adjust_addend (bfd *output_bfd, struct bfd_link_info *info,
9907 bfd *input_bfd, Elf_Internal_Sym *local_syms,
9908 asection **local_sections, Elf_Internal_Rela *rel)
9910 unsigned int r_type, r_symndx;
9911 Elf_Internal_Sym *sym;
9914 if (mips_elf_local_relocation_p (input_bfd, rel, local_sections))
9916 r_type = ELF_R_TYPE (output_bfd, rel->r_info);
9917 if (gprel16_reloc_p (r_type)
9918 || r_type == R_MIPS_GPREL32
9919 || literal_reloc_p (r_type))
9921 rel->r_addend += _bfd_get_gp_value (input_bfd);
9922 rel->r_addend -= _bfd_get_gp_value (output_bfd);
9925 r_symndx = ELF_R_SYM (output_bfd, rel->r_info);
9926 sym = local_syms + r_symndx;
9928 /* Adjust REL's addend to account for section merging. */
9929 if (!bfd_link_relocatable (info))
9931 sec = local_sections[r_symndx];
9932 _bfd_elf_rela_local_sym (output_bfd, sym, &sec, rel);
9935 /* This would normally be done by the rela_normal code in elflink.c. */
9936 if (ELF_ST_TYPE (sym->st_info) == STT_SECTION)
9937 rel->r_addend += local_sections[r_symndx]->output_offset;
9941 /* Handle relocations against symbols from removed linkonce sections,
9942 or sections discarded by a linker script. We use this wrapper around
9943 RELOC_AGAINST_DISCARDED_SECTION to handle triplets of compound relocs
9944 on 64-bit ELF targets. In this case for any relocation handled, which
9945 always be the first in a triplet, the remaining two have to be processed
9946 together with the first, even if they are R_MIPS_NONE. It is the symbol
9947 index referred by the first reloc that applies to all the three and the
9948 remaining two never refer to an object symbol. And it is the final
9949 relocation (the last non-null one) that determines the output field of
9950 the whole relocation so retrieve the corresponding howto structure for
9951 the relocatable field to be cleared by RELOC_AGAINST_DISCARDED_SECTION.
9953 Note that RELOC_AGAINST_DISCARDED_SECTION is a macro that uses "continue"
9954 and therefore requires to be pasted in a loop. It also defines a block
9955 and does not protect any of its arguments, hence the extra brackets. */
9958 mips_reloc_against_discarded_section (bfd *output_bfd,
9959 struct bfd_link_info *info,
9960 bfd *input_bfd, asection *input_section,
9961 Elf_Internal_Rela **rel,
9962 const Elf_Internal_Rela **relend,
9963 bfd_boolean rel_reloc,
9964 reloc_howto_type *howto,
9967 const struct elf_backend_data *bed = get_elf_backend_data (output_bfd);
9968 int count = bed->s->int_rels_per_ext_rel;
9969 unsigned int r_type;
9972 for (i = count - 1; i > 0; i--)
9974 r_type = ELF_R_TYPE (output_bfd, (*rel)[i].r_info);
9975 if (r_type != R_MIPS_NONE)
9977 howto = MIPS_ELF_RTYPE_TO_HOWTO (input_bfd, r_type, !rel_reloc);
9983 RELOC_AGAINST_DISCARDED_SECTION (info, input_bfd, input_section,
9984 (*rel), count, (*relend),
9985 howto, i, contents);
9990 /* Relocate a MIPS ELF section. */
9993 _bfd_mips_elf_relocate_section (bfd *output_bfd, struct bfd_link_info *info,
9994 bfd *input_bfd, asection *input_section,
9995 bfd_byte *contents, Elf_Internal_Rela *relocs,
9996 Elf_Internal_Sym *local_syms,
9997 asection **local_sections)
9999 Elf_Internal_Rela *rel;
10000 const Elf_Internal_Rela *relend;
10001 bfd_vma addend = 0;
10002 bfd_boolean use_saved_addend_p = FALSE;
10003 const struct elf_backend_data *bed;
10005 bed = get_elf_backend_data (output_bfd);
10006 relend = relocs + input_section->reloc_count * bed->s->int_rels_per_ext_rel;
10007 for (rel = relocs; rel < relend; ++rel)
10011 reloc_howto_type *howto;
10012 bfd_boolean cross_mode_jump_p = FALSE;
10013 /* TRUE if the relocation is a RELA relocation, rather than a
10015 bfd_boolean rela_relocation_p = TRUE;
10016 unsigned int r_type = ELF_R_TYPE (output_bfd, rel->r_info);
10018 unsigned long r_symndx;
10020 Elf_Internal_Shdr *symtab_hdr;
10021 struct elf_link_hash_entry *h;
10022 bfd_boolean rel_reloc;
10024 rel_reloc = (NEWABI_P (input_bfd)
10025 && mips_elf_rel_relocation_p (input_bfd, input_section,
10027 /* Find the relocation howto for this relocation. */
10028 howto = MIPS_ELF_RTYPE_TO_HOWTO (input_bfd, r_type, !rel_reloc);
10030 r_symndx = ELF_R_SYM (input_bfd, rel->r_info);
10031 symtab_hdr = &elf_tdata (input_bfd)->symtab_hdr;
10032 if (mips_elf_local_relocation_p (input_bfd, rel, local_sections))
10034 sec = local_sections[r_symndx];
10039 unsigned long extsymoff;
10042 if (!elf_bad_symtab (input_bfd))
10043 extsymoff = symtab_hdr->sh_info;
10044 h = elf_sym_hashes (input_bfd) [r_symndx - extsymoff];
10045 while (h->root.type == bfd_link_hash_indirect
10046 || h->root.type == bfd_link_hash_warning)
10047 h = (struct elf_link_hash_entry *) h->root.u.i.link;
10050 if (h->root.type == bfd_link_hash_defined
10051 || h->root.type == bfd_link_hash_defweak)
10052 sec = h->root.u.def.section;
10055 if (sec != NULL && discarded_section (sec))
10057 mips_reloc_against_discarded_section (output_bfd, info, input_bfd,
10058 input_section, &rel, &relend,
10059 rel_reloc, howto, contents);
10063 if (r_type == R_MIPS_64 && ! NEWABI_P (input_bfd))
10065 /* Some 32-bit code uses R_MIPS_64. In particular, people use
10066 64-bit code, but make sure all their addresses are in the
10067 lowermost or uppermost 32-bit section of the 64-bit address
10068 space. Thus, when they use an R_MIPS_64 they mean what is
10069 usually meant by R_MIPS_32, with the exception that the
10070 stored value is sign-extended to 64 bits. */
10071 howto = MIPS_ELF_RTYPE_TO_HOWTO (input_bfd, R_MIPS_32, FALSE);
10073 /* On big-endian systems, we need to lie about the position
10075 if (bfd_big_endian (input_bfd))
10076 rel->r_offset += 4;
10079 if (!use_saved_addend_p)
10081 /* If these relocations were originally of the REL variety,
10082 we must pull the addend out of the field that will be
10083 relocated. Otherwise, we simply use the contents of the
10084 RELA relocation. */
10085 if (mips_elf_rel_relocation_p (input_bfd, input_section,
10088 rela_relocation_p = FALSE;
10089 addend = mips_elf_read_rel_addend (input_bfd, rel,
10091 if (hi16_reloc_p (r_type)
10092 || (got16_reloc_p (r_type)
10093 && mips_elf_local_relocation_p (input_bfd, rel,
10096 if (!mips_elf_add_lo16_rel_addend (input_bfd, rel, relend,
10097 contents, &addend))
10100 name = h->root.root.string;
10102 name = bfd_elf_sym_name (input_bfd, symtab_hdr,
10103 local_syms + r_symndx,
10105 (*_bfd_error_handler)
10106 (_("%B: Can't find matching LO16 reloc against `%s' for %s at 0x%lx in section `%A'"),
10107 input_bfd, input_section, name, howto->name,
10112 addend <<= howto->rightshift;
10115 addend = rel->r_addend;
10116 mips_elf_adjust_addend (output_bfd, info, input_bfd,
10117 local_syms, local_sections, rel);
10120 if (bfd_link_relocatable (info))
10122 if (r_type == R_MIPS_64 && ! NEWABI_P (output_bfd)
10123 && bfd_big_endian (input_bfd))
10124 rel->r_offset -= 4;
10126 if (!rela_relocation_p && rel->r_addend)
10128 addend += rel->r_addend;
10129 if (hi16_reloc_p (r_type) || got16_reloc_p (r_type))
10130 addend = mips_elf_high (addend);
10131 else if (r_type == R_MIPS_HIGHER)
10132 addend = mips_elf_higher (addend);
10133 else if (r_type == R_MIPS_HIGHEST)
10134 addend = mips_elf_highest (addend);
10136 addend >>= howto->rightshift;
10138 /* We use the source mask, rather than the destination
10139 mask because the place to which we are writing will be
10140 source of the addend in the final link. */
10141 addend &= howto->src_mask;
10143 if (r_type == R_MIPS_64 && ! NEWABI_P (output_bfd))
10144 /* See the comment above about using R_MIPS_64 in the 32-bit
10145 ABI. Here, we need to update the addend. It would be
10146 possible to get away with just using the R_MIPS_32 reloc
10147 but for endianness. */
10153 if (addend & ((bfd_vma) 1 << 31))
10155 sign_bits = ((bfd_vma) 1 << 32) - 1;
10162 /* If we don't know that we have a 64-bit type,
10163 do two separate stores. */
10164 if (bfd_big_endian (input_bfd))
10166 /* Store the sign-bits (which are most significant)
10168 low_bits = sign_bits;
10169 high_bits = addend;
10174 high_bits = sign_bits;
10176 bfd_put_32 (input_bfd, low_bits,
10177 contents + rel->r_offset);
10178 bfd_put_32 (input_bfd, high_bits,
10179 contents + rel->r_offset + 4);
10183 if (! mips_elf_perform_relocation (info, howto, rel, addend,
10184 input_bfd, input_section,
10189 /* Go on to the next relocation. */
10193 /* In the N32 and 64-bit ABIs there may be multiple consecutive
10194 relocations for the same offset. In that case we are
10195 supposed to treat the output of each relocation as the addend
10197 if (rel + 1 < relend
10198 && rel->r_offset == rel[1].r_offset
10199 && ELF_R_TYPE (input_bfd, rel[1].r_info) != R_MIPS_NONE)
10200 use_saved_addend_p = TRUE;
10202 use_saved_addend_p = FALSE;
10204 /* Figure out what value we are supposed to relocate. */
10205 switch (mips_elf_calculate_relocation (output_bfd, input_bfd,
10206 input_section, info, rel,
10207 addend, howto, local_syms,
10208 local_sections, &value,
10209 &name, &cross_mode_jump_p,
10210 use_saved_addend_p))
10212 case bfd_reloc_continue:
10213 /* There's nothing to do. */
10216 case bfd_reloc_undefined:
10217 /* mips_elf_calculate_relocation already called the
10218 undefined_symbol callback. There's no real point in
10219 trying to perform the relocation at this point, so we
10220 just skip ahead to the next relocation. */
10223 case bfd_reloc_notsupported:
10224 msg = _("internal error: unsupported relocation error");
10225 info->callbacks->warning
10226 (info, msg, name, input_bfd, input_section, rel->r_offset);
10229 case bfd_reloc_overflow:
10230 if (use_saved_addend_p)
10231 /* Ignore overflow until we reach the last relocation for
10232 a given location. */
10236 struct mips_elf_link_hash_table *htab;
10238 htab = mips_elf_hash_table (info);
10239 BFD_ASSERT (htab != NULL);
10240 BFD_ASSERT (name != NULL);
10241 if (!htab->small_data_overflow_reported
10242 && (gprel16_reloc_p (howto->type)
10243 || literal_reloc_p (howto->type)))
10245 msg = _("small-data section exceeds 64KB;"
10246 " lower small-data size limit (see option -G)");
10248 htab->small_data_overflow_reported = TRUE;
10249 (*info->callbacks->einfo) ("%P: %s\n", msg);
10251 if (! ((*info->callbacks->reloc_overflow)
10252 (info, NULL, name, howto->name, (bfd_vma) 0,
10253 input_bfd, input_section, rel->r_offset)))
10261 case bfd_reloc_outofrange:
10263 if (jal_reloc_p (howto->type))
10264 msg = _("JALX to a non-word-aligned address");
10265 else if (aligned_pcrel_reloc_p (howto->type))
10266 msg = _("PC-relative load from unaligned address");
10269 info->callbacks->einfo
10270 ("%C: %s\n", input_bfd, input_section, rel->r_offset, msg);
10271 bfd_set_error (bfd_error_bad_value);
10274 /* Fall through. */
10281 /* If we've got another relocation for the address, keep going
10282 until we reach the last one. */
10283 if (use_saved_addend_p)
10289 if (r_type == R_MIPS_64 && ! NEWABI_P (output_bfd))
10290 /* See the comment above about using R_MIPS_64 in the 32-bit
10291 ABI. Until now, we've been using the HOWTO for R_MIPS_32;
10292 that calculated the right value. Now, however, we
10293 sign-extend the 32-bit result to 64-bits, and store it as a
10294 64-bit value. We are especially generous here in that we
10295 go to extreme lengths to support this usage on systems with
10296 only a 32-bit VMA. */
10302 if (value & ((bfd_vma) 1 << 31))
10304 sign_bits = ((bfd_vma) 1 << 32) - 1;
10311 /* If we don't know that we have a 64-bit type,
10312 do two separate stores. */
10313 if (bfd_big_endian (input_bfd))
10315 /* Undo what we did above. */
10316 rel->r_offset -= 4;
10317 /* Store the sign-bits (which are most significant)
10319 low_bits = sign_bits;
10325 high_bits = sign_bits;
10327 bfd_put_32 (input_bfd, low_bits,
10328 contents + rel->r_offset);
10329 bfd_put_32 (input_bfd, high_bits,
10330 contents + rel->r_offset + 4);
10334 /* Actually perform the relocation. */
10335 if (! mips_elf_perform_relocation (info, howto, rel, value,
10336 input_bfd, input_section,
10337 contents, cross_mode_jump_p))
10344 /* A function that iterates over each entry in la25_stubs and fills
10345 in the code for each one. DATA points to a mips_htab_traverse_info. */
10348 mips_elf_create_la25_stub (void **slot, void *data)
10350 struct mips_htab_traverse_info *hti;
10351 struct mips_elf_link_hash_table *htab;
10352 struct mips_elf_la25_stub *stub;
10355 bfd_vma offset, target, target_high, target_low;
10357 stub = (struct mips_elf_la25_stub *) *slot;
10358 hti = (struct mips_htab_traverse_info *) data;
10359 htab = mips_elf_hash_table (hti->info);
10360 BFD_ASSERT (htab != NULL);
10362 /* Create the section contents, if we haven't already. */
10363 s = stub->stub_section;
10367 loc = bfd_malloc (s->size);
10376 /* Work out where in the section this stub should go. */
10377 offset = stub->offset;
10379 /* Work out the target address. */
10380 target = mips_elf_get_la25_target (stub, &s);
10381 target += s->output_section->vma + s->output_offset;
10383 target_high = ((target + 0x8000) >> 16) & 0xffff;
10384 target_low = (target & 0xffff);
10386 if (stub->stub_section != htab->strampoline)
10388 /* This is a simple LUI/ADDIU stub. Zero out the beginning
10389 of the section and write the two instructions at the end. */
10390 memset (loc, 0, offset);
10392 if (ELF_ST_IS_MICROMIPS (stub->h->root.other))
10394 bfd_put_micromips_32 (hti->output_bfd,
10395 LA25_LUI_MICROMIPS (target_high),
10397 bfd_put_micromips_32 (hti->output_bfd,
10398 LA25_ADDIU_MICROMIPS (target_low),
10403 bfd_put_32 (hti->output_bfd, LA25_LUI (target_high), loc);
10404 bfd_put_32 (hti->output_bfd, LA25_ADDIU (target_low), loc + 4);
10409 /* This is trampoline. */
10411 if (ELF_ST_IS_MICROMIPS (stub->h->root.other))
10413 bfd_put_micromips_32 (hti->output_bfd,
10414 LA25_LUI_MICROMIPS (target_high), loc);
10415 bfd_put_micromips_32 (hti->output_bfd,
10416 LA25_J_MICROMIPS (target), loc + 4);
10417 bfd_put_micromips_32 (hti->output_bfd,
10418 LA25_ADDIU_MICROMIPS (target_low), loc + 8);
10419 bfd_put_32 (hti->output_bfd, 0, loc + 12);
10423 bfd_put_32 (hti->output_bfd, LA25_LUI (target_high), loc);
10424 bfd_put_32 (hti->output_bfd, LA25_J (target), loc + 4);
10425 bfd_put_32 (hti->output_bfd, LA25_ADDIU (target_low), loc + 8);
10426 bfd_put_32 (hti->output_bfd, 0, loc + 12);
10432 /* If NAME is one of the special IRIX6 symbols defined by the linker,
10433 adjust it appropriately now. */
10436 mips_elf_irix6_finish_dynamic_symbol (bfd *abfd ATTRIBUTE_UNUSED,
10437 const char *name, Elf_Internal_Sym *sym)
10439 /* The linker script takes care of providing names and values for
10440 these, but we must place them into the right sections. */
10441 static const char* const text_section_symbols[] = {
10444 "__dso_displacement",
10446 "__program_header_table",
10450 static const char* const data_section_symbols[] = {
10458 const char* const *p;
10461 for (i = 0; i < 2; ++i)
10462 for (p = (i == 0) ? text_section_symbols : data_section_symbols;
10465 if (strcmp (*p, name) == 0)
10467 /* All of these symbols are given type STT_SECTION by the
10469 sym->st_info = ELF_ST_INFO (STB_GLOBAL, STT_SECTION);
10470 sym->st_other = STO_PROTECTED;
10472 /* The IRIX linker puts these symbols in special sections. */
10474 sym->st_shndx = SHN_MIPS_TEXT;
10476 sym->st_shndx = SHN_MIPS_DATA;
10482 /* Finish up dynamic symbol handling. We set the contents of various
10483 dynamic sections here. */
10486 _bfd_mips_elf_finish_dynamic_symbol (bfd *output_bfd,
10487 struct bfd_link_info *info,
10488 struct elf_link_hash_entry *h,
10489 Elf_Internal_Sym *sym)
10493 struct mips_got_info *g, *gg;
10496 struct mips_elf_link_hash_table *htab;
10497 struct mips_elf_link_hash_entry *hmips;
10499 htab = mips_elf_hash_table (info);
10500 BFD_ASSERT (htab != NULL);
10501 dynobj = elf_hash_table (info)->dynobj;
10502 hmips = (struct mips_elf_link_hash_entry *) h;
10504 BFD_ASSERT (!htab->is_vxworks);
10506 if (h->plt.plist != NULL
10507 && (h->plt.plist->mips_offset != MINUS_ONE
10508 || h->plt.plist->comp_offset != MINUS_ONE))
10510 /* We've decided to create a PLT entry for this symbol. */
10512 bfd_vma header_address, got_address;
10513 bfd_vma got_address_high, got_address_low, load;
10517 got_index = h->plt.plist->gotplt_index;
10519 BFD_ASSERT (htab->use_plts_and_copy_relocs);
10520 BFD_ASSERT (h->dynindx != -1);
10521 BFD_ASSERT (htab->splt != NULL);
10522 BFD_ASSERT (got_index != MINUS_ONE);
10523 BFD_ASSERT (!h->def_regular);
10525 /* Calculate the address of the PLT header. */
10526 isa_bit = htab->plt_header_is_comp;
10527 header_address = (htab->splt->output_section->vma
10528 + htab->splt->output_offset + isa_bit);
10530 /* Calculate the address of the .got.plt entry. */
10531 got_address = (htab->sgotplt->output_section->vma
10532 + htab->sgotplt->output_offset
10533 + got_index * MIPS_ELF_GOT_SIZE (dynobj));
10535 got_address_high = ((got_address + 0x8000) >> 16) & 0xffff;
10536 got_address_low = got_address & 0xffff;
10538 /* Initially point the .got.plt entry at the PLT header. */
10539 loc = (htab->sgotplt->contents + got_index * MIPS_ELF_GOT_SIZE (dynobj));
10540 if (ABI_64_P (output_bfd))
10541 bfd_put_64 (output_bfd, header_address, loc);
10543 bfd_put_32 (output_bfd, header_address, loc);
10545 /* Now handle the PLT itself. First the standard entry (the order
10546 does not matter, we just have to pick one). */
10547 if (h->plt.plist->mips_offset != MINUS_ONE)
10549 const bfd_vma *plt_entry;
10550 bfd_vma plt_offset;
10552 plt_offset = htab->plt_header_size + h->plt.plist->mips_offset;
10554 BFD_ASSERT (plt_offset <= htab->splt->size);
10556 /* Find out where the .plt entry should go. */
10557 loc = htab->splt->contents + plt_offset;
10559 /* Pick the load opcode. */
10560 load = MIPS_ELF_LOAD_WORD (output_bfd);
10562 /* Fill in the PLT entry itself. */
10564 if (MIPSR6_P (output_bfd))
10565 plt_entry = mipsr6_exec_plt_entry;
10567 plt_entry = mips_exec_plt_entry;
10568 bfd_put_32 (output_bfd, plt_entry[0] | got_address_high, loc);
10569 bfd_put_32 (output_bfd, plt_entry[1] | got_address_low | load,
10572 if (! LOAD_INTERLOCKS_P (output_bfd))
10574 bfd_put_32 (output_bfd, plt_entry[2] | got_address_low, loc + 8);
10575 bfd_put_32 (output_bfd, plt_entry[3], loc + 12);
10579 bfd_put_32 (output_bfd, plt_entry[3], loc + 8);
10580 bfd_put_32 (output_bfd, plt_entry[2] | got_address_low,
10585 /* Now the compressed entry. They come after any standard ones. */
10586 if (h->plt.plist->comp_offset != MINUS_ONE)
10588 bfd_vma plt_offset;
10590 plt_offset = (htab->plt_header_size + htab->plt_mips_offset
10591 + h->plt.plist->comp_offset);
10593 BFD_ASSERT (plt_offset <= htab->splt->size);
10595 /* Find out where the .plt entry should go. */
10596 loc = htab->splt->contents + plt_offset;
10598 /* Fill in the PLT entry itself. */
10599 if (!MICROMIPS_P (output_bfd))
10601 const bfd_vma *plt_entry = mips16_o32_exec_plt_entry;
10603 bfd_put_16 (output_bfd, plt_entry[0], loc);
10604 bfd_put_16 (output_bfd, plt_entry[1], loc + 2);
10605 bfd_put_16 (output_bfd, plt_entry[2], loc + 4);
10606 bfd_put_16 (output_bfd, plt_entry[3], loc + 6);
10607 bfd_put_16 (output_bfd, plt_entry[4], loc + 8);
10608 bfd_put_16 (output_bfd, plt_entry[5], loc + 10);
10609 bfd_put_32 (output_bfd, got_address, loc + 12);
10611 else if (htab->insn32)
10613 const bfd_vma *plt_entry = micromips_insn32_o32_exec_plt_entry;
10615 bfd_put_16 (output_bfd, plt_entry[0], loc);
10616 bfd_put_16 (output_bfd, got_address_high, loc + 2);
10617 bfd_put_16 (output_bfd, plt_entry[2], loc + 4);
10618 bfd_put_16 (output_bfd, got_address_low, loc + 6);
10619 bfd_put_16 (output_bfd, plt_entry[4], loc + 8);
10620 bfd_put_16 (output_bfd, plt_entry[5], loc + 10);
10621 bfd_put_16 (output_bfd, plt_entry[6], loc + 12);
10622 bfd_put_16 (output_bfd, got_address_low, loc + 14);
10626 const bfd_vma *plt_entry = micromips_o32_exec_plt_entry;
10627 bfd_signed_vma gotpc_offset;
10628 bfd_vma loc_address;
10630 BFD_ASSERT (got_address % 4 == 0);
10632 loc_address = (htab->splt->output_section->vma
10633 + htab->splt->output_offset + plt_offset);
10634 gotpc_offset = got_address - ((loc_address | 3) ^ 3);
10636 /* ADDIUPC has a span of +/-16MB, check we're in range. */
10637 if (gotpc_offset + 0x1000000 >= 0x2000000)
10639 (*_bfd_error_handler)
10640 (_("%B: `%A' offset of %ld from `%A' "
10641 "beyond the range of ADDIUPC"),
10643 htab->sgotplt->output_section,
10644 htab->splt->output_section,
10645 (long) gotpc_offset);
10646 bfd_set_error (bfd_error_no_error);
10649 bfd_put_16 (output_bfd,
10650 plt_entry[0] | ((gotpc_offset >> 18) & 0x7f), loc);
10651 bfd_put_16 (output_bfd, (gotpc_offset >> 2) & 0xffff, loc + 2);
10652 bfd_put_16 (output_bfd, plt_entry[2], loc + 4);
10653 bfd_put_16 (output_bfd, plt_entry[3], loc + 6);
10654 bfd_put_16 (output_bfd, plt_entry[4], loc + 8);
10655 bfd_put_16 (output_bfd, plt_entry[5], loc + 10);
10659 /* Emit an R_MIPS_JUMP_SLOT relocation against the .got.plt entry. */
10660 mips_elf_output_dynamic_relocation (output_bfd, htab->srelplt,
10661 got_index - 2, h->dynindx,
10662 R_MIPS_JUMP_SLOT, got_address);
10664 /* We distinguish between PLT entries and lazy-binding stubs by
10665 giving the former an st_other value of STO_MIPS_PLT. Set the
10666 flag and leave the value if there are any relocations in the
10667 binary where pointer equality matters. */
10668 sym->st_shndx = SHN_UNDEF;
10669 if (h->pointer_equality_needed)
10670 sym->st_other = ELF_ST_SET_MIPS_PLT (sym->st_other);
10678 if (h->plt.plist != NULL && h->plt.plist->stub_offset != MINUS_ONE)
10680 /* We've decided to create a lazy-binding stub. */
10681 bfd_boolean micromips_p = MICROMIPS_P (output_bfd);
10682 unsigned int other = micromips_p ? STO_MICROMIPS : 0;
10683 bfd_vma stub_size = htab->function_stub_size;
10684 bfd_byte stub[MIPS_FUNCTION_STUB_BIG_SIZE];
10685 bfd_vma isa_bit = micromips_p;
10686 bfd_vma stub_big_size;
10689 stub_big_size = MIPS_FUNCTION_STUB_BIG_SIZE;
10690 else if (htab->insn32)
10691 stub_big_size = MICROMIPS_INSN32_FUNCTION_STUB_BIG_SIZE;
10693 stub_big_size = MICROMIPS_FUNCTION_STUB_BIG_SIZE;
10695 /* This symbol has a stub. Set it up. */
10697 BFD_ASSERT (h->dynindx != -1);
10699 BFD_ASSERT (stub_size == stub_big_size || h->dynindx <= 0xffff);
10701 /* Values up to 2^31 - 1 are allowed. Larger values would cause
10702 sign extension at runtime in the stub, resulting in a negative
10704 if (h->dynindx & ~0x7fffffff)
10707 /* Fill the stub. */
10711 bfd_put_micromips_32 (output_bfd, STUB_LW_MICROMIPS (output_bfd),
10716 bfd_put_micromips_32 (output_bfd,
10717 STUB_MOVE32_MICROMIPS, stub + idx);
10722 bfd_put_16 (output_bfd, STUB_MOVE_MICROMIPS, stub + idx);
10725 if (stub_size == stub_big_size)
10727 long dynindx_hi = (h->dynindx >> 16) & 0x7fff;
10729 bfd_put_micromips_32 (output_bfd,
10730 STUB_LUI_MICROMIPS (dynindx_hi),
10736 bfd_put_micromips_32 (output_bfd, STUB_JALR32_MICROMIPS,
10742 bfd_put_16 (output_bfd, STUB_JALR_MICROMIPS, stub + idx);
10746 /* If a large stub is not required and sign extension is not a
10747 problem, then use legacy code in the stub. */
10748 if (stub_size == stub_big_size)
10749 bfd_put_micromips_32 (output_bfd,
10750 STUB_ORI_MICROMIPS (h->dynindx & 0xffff),
10752 else if (h->dynindx & ~0x7fff)
10753 bfd_put_micromips_32 (output_bfd,
10754 STUB_LI16U_MICROMIPS (h->dynindx & 0xffff),
10757 bfd_put_micromips_32 (output_bfd,
10758 STUB_LI16S_MICROMIPS (output_bfd,
10765 bfd_put_32 (output_bfd, STUB_LW (output_bfd), stub + idx);
10767 bfd_put_32 (output_bfd, STUB_MOVE, stub + idx);
10769 if (stub_size == stub_big_size)
10771 bfd_put_32 (output_bfd, STUB_LUI ((h->dynindx >> 16) & 0x7fff),
10775 bfd_put_32 (output_bfd, STUB_JALR, stub + idx);
10778 /* If a large stub is not required and sign extension is not a
10779 problem, then use legacy code in the stub. */
10780 if (stub_size == stub_big_size)
10781 bfd_put_32 (output_bfd, STUB_ORI (h->dynindx & 0xffff),
10783 else if (h->dynindx & ~0x7fff)
10784 bfd_put_32 (output_bfd, STUB_LI16U (h->dynindx & 0xffff),
10787 bfd_put_32 (output_bfd, STUB_LI16S (output_bfd, h->dynindx),
10791 BFD_ASSERT (h->plt.plist->stub_offset <= htab->sstubs->size);
10792 memcpy (htab->sstubs->contents + h->plt.plist->stub_offset,
10795 /* Mark the symbol as undefined. stub_offset != -1 occurs
10796 only for the referenced symbol. */
10797 sym->st_shndx = SHN_UNDEF;
10799 /* The run-time linker uses the st_value field of the symbol
10800 to reset the global offset table entry for this external
10801 to its stub address when unlinking a shared object. */
10802 sym->st_value = (htab->sstubs->output_section->vma
10803 + htab->sstubs->output_offset
10804 + h->plt.plist->stub_offset
10806 sym->st_other = other;
10809 /* If we have a MIPS16 function with a stub, the dynamic symbol must
10810 refer to the stub, since only the stub uses the standard calling
10812 if (h->dynindx != -1 && hmips->fn_stub != NULL)
10814 BFD_ASSERT (hmips->need_fn_stub);
10815 sym->st_value = (hmips->fn_stub->output_section->vma
10816 + hmips->fn_stub->output_offset);
10817 sym->st_size = hmips->fn_stub->size;
10818 sym->st_other = ELF_ST_VISIBILITY (sym->st_other);
10821 BFD_ASSERT (h->dynindx != -1
10822 || h->forced_local);
10825 g = htab->got_info;
10826 BFD_ASSERT (g != NULL);
10828 /* Run through the global symbol table, creating GOT entries for all
10829 the symbols that need them. */
10830 if (hmips->global_got_area != GGA_NONE)
10835 value = sym->st_value;
10836 offset = mips_elf_primary_global_got_index (output_bfd, info, h);
10837 MIPS_ELF_PUT_WORD (output_bfd, value, sgot->contents + offset);
10840 if (hmips->global_got_area != GGA_NONE && g->next)
10842 struct mips_got_entry e, *p;
10848 e.abfd = output_bfd;
10851 e.tls_type = GOT_TLS_NONE;
10853 for (g = g->next; g->next != gg; g = g->next)
10856 && (p = (struct mips_got_entry *) htab_find (g->got_entries,
10859 offset = p->gotidx;
10860 BFD_ASSERT (offset > 0 && offset < htab->sgot->size);
10861 if (bfd_link_pic (info)
10862 || (elf_hash_table (info)->dynamic_sections_created
10864 && p->d.h->root.def_dynamic
10865 && !p->d.h->root.def_regular))
10867 /* Create an R_MIPS_REL32 relocation for this entry. Due to
10868 the various compatibility problems, it's easier to mock
10869 up an R_MIPS_32 or R_MIPS_64 relocation and leave
10870 mips_elf_create_dynamic_relocation to calculate the
10871 appropriate addend. */
10872 Elf_Internal_Rela rel[3];
10874 memset (rel, 0, sizeof (rel));
10875 if (ABI_64_P (output_bfd))
10876 rel[0].r_info = ELF_R_INFO (output_bfd, 0, R_MIPS_64);
10878 rel[0].r_info = ELF_R_INFO (output_bfd, 0, R_MIPS_32);
10879 rel[0].r_offset = rel[1].r_offset = rel[2].r_offset = offset;
10882 if (! (mips_elf_create_dynamic_relocation
10883 (output_bfd, info, rel,
10884 e.d.h, NULL, sym->st_value, &entry, sgot)))
10888 entry = sym->st_value;
10889 MIPS_ELF_PUT_WORD (output_bfd, entry, sgot->contents + offset);
10894 /* Mark _DYNAMIC and _GLOBAL_OFFSET_TABLE_ as absolute. */
10895 name = h->root.root.string;
10896 if (h == elf_hash_table (info)->hdynamic
10897 || h == elf_hash_table (info)->hgot)
10898 sym->st_shndx = SHN_ABS;
10899 else if (strcmp (name, "_DYNAMIC_LINK") == 0
10900 || strcmp (name, "_DYNAMIC_LINKING") == 0)
10902 sym->st_shndx = SHN_ABS;
10903 sym->st_info = ELF_ST_INFO (STB_GLOBAL, STT_SECTION);
10906 else if (strcmp (name, "_gp_disp") == 0 && ! NEWABI_P (output_bfd))
10908 sym->st_shndx = SHN_ABS;
10909 sym->st_info = ELF_ST_INFO (STB_GLOBAL, STT_SECTION);
10910 sym->st_value = elf_gp (output_bfd);
10912 else if (SGI_COMPAT (output_bfd))
10914 if (strcmp (name, mips_elf_dynsym_rtproc_names[0]) == 0
10915 || strcmp (name, mips_elf_dynsym_rtproc_names[1]) == 0)
10917 sym->st_info = ELF_ST_INFO (STB_GLOBAL, STT_SECTION);
10918 sym->st_other = STO_PROTECTED;
10920 sym->st_shndx = SHN_MIPS_DATA;
10922 else if (strcmp (name, mips_elf_dynsym_rtproc_names[2]) == 0)
10924 sym->st_info = ELF_ST_INFO (STB_GLOBAL, STT_SECTION);
10925 sym->st_other = STO_PROTECTED;
10926 sym->st_value = mips_elf_hash_table (info)->procedure_count;
10927 sym->st_shndx = SHN_ABS;
10929 else if (sym->st_shndx != SHN_UNDEF && sym->st_shndx != SHN_ABS)
10931 if (h->type == STT_FUNC)
10932 sym->st_shndx = SHN_MIPS_TEXT;
10933 else if (h->type == STT_OBJECT)
10934 sym->st_shndx = SHN_MIPS_DATA;
10938 /* Emit a copy reloc, if needed. */
10944 BFD_ASSERT (h->dynindx != -1);
10945 BFD_ASSERT (htab->use_plts_and_copy_relocs);
10947 s = mips_elf_rel_dyn_section (info, FALSE);
10948 symval = (h->root.u.def.section->output_section->vma
10949 + h->root.u.def.section->output_offset
10950 + h->root.u.def.value);
10951 mips_elf_output_dynamic_relocation (output_bfd, s, s->reloc_count++,
10952 h->dynindx, R_MIPS_COPY, symval);
10955 /* Handle the IRIX6-specific symbols. */
10956 if (IRIX_COMPAT (output_bfd) == ict_irix6)
10957 mips_elf_irix6_finish_dynamic_symbol (output_bfd, name, sym);
10959 /* Keep dynamic compressed symbols odd. This allows the dynamic linker
10960 to treat compressed symbols like any other. */
10961 if (ELF_ST_IS_MIPS16 (sym->st_other))
10963 BFD_ASSERT (sym->st_value & 1);
10964 sym->st_other -= STO_MIPS16;
10966 else if (ELF_ST_IS_MICROMIPS (sym->st_other))
10968 BFD_ASSERT (sym->st_value & 1);
10969 sym->st_other -= STO_MICROMIPS;
10975 /* Likewise, for VxWorks. */
10978 _bfd_mips_vxworks_finish_dynamic_symbol (bfd *output_bfd,
10979 struct bfd_link_info *info,
10980 struct elf_link_hash_entry *h,
10981 Elf_Internal_Sym *sym)
10985 struct mips_got_info *g;
10986 struct mips_elf_link_hash_table *htab;
10987 struct mips_elf_link_hash_entry *hmips;
10989 htab = mips_elf_hash_table (info);
10990 BFD_ASSERT (htab != NULL);
10991 dynobj = elf_hash_table (info)->dynobj;
10992 hmips = (struct mips_elf_link_hash_entry *) h;
10994 if (h->plt.plist != NULL && h->plt.plist->mips_offset != MINUS_ONE)
10997 bfd_vma plt_address, got_address, got_offset, branch_offset;
10998 Elf_Internal_Rela rel;
10999 static const bfd_vma *plt_entry;
11000 bfd_vma gotplt_index;
11001 bfd_vma plt_offset;
11003 plt_offset = htab->plt_header_size + h->plt.plist->mips_offset;
11004 gotplt_index = h->plt.plist->gotplt_index;
11006 BFD_ASSERT (h->dynindx != -1);
11007 BFD_ASSERT (htab->splt != NULL);
11008 BFD_ASSERT (gotplt_index != MINUS_ONE);
11009 BFD_ASSERT (plt_offset <= htab->splt->size);
11011 /* Calculate the address of the .plt entry. */
11012 plt_address = (htab->splt->output_section->vma
11013 + htab->splt->output_offset
11016 /* Calculate the address of the .got.plt entry. */
11017 got_address = (htab->sgotplt->output_section->vma
11018 + htab->sgotplt->output_offset
11019 + gotplt_index * MIPS_ELF_GOT_SIZE (output_bfd));
11021 /* Calculate the offset of the .got.plt entry from
11022 _GLOBAL_OFFSET_TABLE_. */
11023 got_offset = mips_elf_gotplt_index (info, h);
11025 /* Calculate the offset for the branch at the start of the PLT
11026 entry. The branch jumps to the beginning of .plt. */
11027 branch_offset = -(plt_offset / 4 + 1) & 0xffff;
11029 /* Fill in the initial value of the .got.plt entry. */
11030 bfd_put_32 (output_bfd, plt_address,
11031 (htab->sgotplt->contents
11032 + gotplt_index * MIPS_ELF_GOT_SIZE (output_bfd)));
11034 /* Find out where the .plt entry should go. */
11035 loc = htab->splt->contents + plt_offset;
11037 if (bfd_link_pic (info))
11039 plt_entry = mips_vxworks_shared_plt_entry;
11040 bfd_put_32 (output_bfd, plt_entry[0] | branch_offset, loc);
11041 bfd_put_32 (output_bfd, plt_entry[1] | gotplt_index, loc + 4);
11045 bfd_vma got_address_high, got_address_low;
11047 plt_entry = mips_vxworks_exec_plt_entry;
11048 got_address_high = ((got_address + 0x8000) >> 16) & 0xffff;
11049 got_address_low = got_address & 0xffff;
11051 bfd_put_32 (output_bfd, plt_entry[0] | branch_offset, loc);
11052 bfd_put_32 (output_bfd, plt_entry[1] | gotplt_index, loc + 4);
11053 bfd_put_32 (output_bfd, plt_entry[2] | got_address_high, loc + 8);
11054 bfd_put_32 (output_bfd, plt_entry[3] | got_address_low, loc + 12);
11055 bfd_put_32 (output_bfd, plt_entry[4], loc + 16);
11056 bfd_put_32 (output_bfd, plt_entry[5], loc + 20);
11057 bfd_put_32 (output_bfd, plt_entry[6], loc + 24);
11058 bfd_put_32 (output_bfd, plt_entry[7], loc + 28);
11060 loc = (htab->srelplt2->contents
11061 + (gotplt_index * 3 + 2) * sizeof (Elf32_External_Rela));
11063 /* Emit a relocation for the .got.plt entry. */
11064 rel.r_offset = got_address;
11065 rel.r_info = ELF32_R_INFO (htab->root.hplt->indx, R_MIPS_32);
11066 rel.r_addend = plt_offset;
11067 bfd_elf32_swap_reloca_out (output_bfd, &rel, loc);
11069 /* Emit a relocation for the lui of %hi(<.got.plt slot>). */
11070 loc += sizeof (Elf32_External_Rela);
11071 rel.r_offset = plt_address + 8;
11072 rel.r_info = ELF32_R_INFO (htab->root.hgot->indx, R_MIPS_HI16);
11073 rel.r_addend = got_offset;
11074 bfd_elf32_swap_reloca_out (output_bfd, &rel, loc);
11076 /* Emit a relocation for the addiu of %lo(<.got.plt slot>). */
11077 loc += sizeof (Elf32_External_Rela);
11079 rel.r_info = ELF32_R_INFO (htab->root.hgot->indx, R_MIPS_LO16);
11080 bfd_elf32_swap_reloca_out (output_bfd, &rel, loc);
11083 /* Emit an R_MIPS_JUMP_SLOT relocation against the .got.plt entry. */
11084 loc = (htab->srelplt->contents
11085 + gotplt_index * sizeof (Elf32_External_Rela));
11086 rel.r_offset = got_address;
11087 rel.r_info = ELF32_R_INFO (h->dynindx, R_MIPS_JUMP_SLOT);
11089 bfd_elf32_swap_reloca_out (output_bfd, &rel, loc);
11091 if (!h->def_regular)
11092 sym->st_shndx = SHN_UNDEF;
11095 BFD_ASSERT (h->dynindx != -1 || h->forced_local);
11098 g = htab->got_info;
11099 BFD_ASSERT (g != NULL);
11101 /* See if this symbol has an entry in the GOT. */
11102 if (hmips->global_got_area != GGA_NONE)
11105 Elf_Internal_Rela outrel;
11109 /* Install the symbol value in the GOT. */
11110 offset = mips_elf_primary_global_got_index (output_bfd, info, h);
11111 MIPS_ELF_PUT_WORD (output_bfd, sym->st_value, sgot->contents + offset);
11113 /* Add a dynamic relocation for it. */
11114 s = mips_elf_rel_dyn_section (info, FALSE);
11115 loc = s->contents + (s->reloc_count++ * sizeof (Elf32_External_Rela));
11116 outrel.r_offset = (sgot->output_section->vma
11117 + sgot->output_offset
11119 outrel.r_info = ELF32_R_INFO (h->dynindx, R_MIPS_32);
11120 outrel.r_addend = 0;
11121 bfd_elf32_swap_reloca_out (dynobj, &outrel, loc);
11124 /* Emit a copy reloc, if needed. */
11127 Elf_Internal_Rela rel;
11129 BFD_ASSERT (h->dynindx != -1);
11131 rel.r_offset = (h->root.u.def.section->output_section->vma
11132 + h->root.u.def.section->output_offset
11133 + h->root.u.def.value);
11134 rel.r_info = ELF32_R_INFO (h->dynindx, R_MIPS_COPY);
11136 bfd_elf32_swap_reloca_out (output_bfd, &rel,
11137 htab->srelbss->contents
11138 + (htab->srelbss->reloc_count
11139 * sizeof (Elf32_External_Rela)));
11140 ++htab->srelbss->reloc_count;
11143 /* If this is a mips16/microMIPS symbol, force the value to be even. */
11144 if (ELF_ST_IS_COMPRESSED (sym->st_other))
11145 sym->st_value &= ~1;
11150 /* Write out a plt0 entry to the beginning of .plt. */
11153 mips_finish_exec_plt (bfd *output_bfd, struct bfd_link_info *info)
11156 bfd_vma gotplt_value, gotplt_value_high, gotplt_value_low;
11157 static const bfd_vma *plt_entry;
11158 struct mips_elf_link_hash_table *htab;
11160 htab = mips_elf_hash_table (info);
11161 BFD_ASSERT (htab != NULL);
11163 if (ABI_64_P (output_bfd))
11164 plt_entry = mips_n64_exec_plt0_entry;
11165 else if (ABI_N32_P (output_bfd))
11166 plt_entry = mips_n32_exec_plt0_entry;
11167 else if (!htab->plt_header_is_comp)
11168 plt_entry = mips_o32_exec_plt0_entry;
11169 else if (htab->insn32)
11170 plt_entry = micromips_insn32_o32_exec_plt0_entry;
11172 plt_entry = micromips_o32_exec_plt0_entry;
11174 /* Calculate the value of .got.plt. */
11175 gotplt_value = (htab->sgotplt->output_section->vma
11176 + htab->sgotplt->output_offset);
11177 gotplt_value_high = ((gotplt_value + 0x8000) >> 16) & 0xffff;
11178 gotplt_value_low = gotplt_value & 0xffff;
11180 /* The PLT sequence is not safe for N64 if .got.plt's address can
11181 not be loaded in two instructions. */
11182 BFD_ASSERT ((gotplt_value & ~(bfd_vma) 0x7fffffff) == 0
11183 || ~(gotplt_value | 0x7fffffff) == 0);
11185 /* Install the PLT header. */
11186 loc = htab->splt->contents;
11187 if (plt_entry == micromips_o32_exec_plt0_entry)
11189 bfd_vma gotpc_offset;
11190 bfd_vma loc_address;
11193 BFD_ASSERT (gotplt_value % 4 == 0);
11195 loc_address = (htab->splt->output_section->vma
11196 + htab->splt->output_offset);
11197 gotpc_offset = gotplt_value - ((loc_address | 3) ^ 3);
11199 /* ADDIUPC has a span of +/-16MB, check we're in range. */
11200 if (gotpc_offset + 0x1000000 >= 0x2000000)
11202 (*_bfd_error_handler)
11203 (_("%B: `%A' offset of %ld from `%A' beyond the range of ADDIUPC"),
11205 htab->sgotplt->output_section,
11206 htab->splt->output_section,
11207 (long) gotpc_offset);
11208 bfd_set_error (bfd_error_no_error);
11211 bfd_put_16 (output_bfd,
11212 plt_entry[0] | ((gotpc_offset >> 18) & 0x7f), loc);
11213 bfd_put_16 (output_bfd, (gotpc_offset >> 2) & 0xffff, loc + 2);
11214 for (i = 2; i < ARRAY_SIZE (micromips_o32_exec_plt0_entry); i++)
11215 bfd_put_16 (output_bfd, plt_entry[i], loc + (i * 2));
11217 else if (plt_entry == micromips_insn32_o32_exec_plt0_entry)
11221 bfd_put_16 (output_bfd, plt_entry[0], loc);
11222 bfd_put_16 (output_bfd, gotplt_value_high, loc + 2);
11223 bfd_put_16 (output_bfd, plt_entry[2], loc + 4);
11224 bfd_put_16 (output_bfd, gotplt_value_low, loc + 6);
11225 bfd_put_16 (output_bfd, plt_entry[4], loc + 8);
11226 bfd_put_16 (output_bfd, gotplt_value_low, loc + 10);
11227 for (i = 6; i < ARRAY_SIZE (micromips_insn32_o32_exec_plt0_entry); i++)
11228 bfd_put_16 (output_bfd, plt_entry[i], loc + (i * 2));
11232 bfd_put_32 (output_bfd, plt_entry[0] | gotplt_value_high, loc);
11233 bfd_put_32 (output_bfd, plt_entry[1] | gotplt_value_low, loc + 4);
11234 bfd_put_32 (output_bfd, plt_entry[2] | gotplt_value_low, loc + 8);
11235 bfd_put_32 (output_bfd, plt_entry[3], loc + 12);
11236 bfd_put_32 (output_bfd, plt_entry[4], loc + 16);
11237 bfd_put_32 (output_bfd, plt_entry[5], loc + 20);
11238 bfd_put_32 (output_bfd, plt_entry[6], loc + 24);
11239 bfd_put_32 (output_bfd, plt_entry[7], loc + 28);
11245 /* Install the PLT header for a VxWorks executable and finalize the
11246 contents of .rela.plt.unloaded. */
11249 mips_vxworks_finish_exec_plt (bfd *output_bfd, struct bfd_link_info *info)
11251 Elf_Internal_Rela rela;
11253 bfd_vma got_value, got_value_high, got_value_low, plt_address;
11254 static const bfd_vma *plt_entry;
11255 struct mips_elf_link_hash_table *htab;
11257 htab = mips_elf_hash_table (info);
11258 BFD_ASSERT (htab != NULL);
11260 plt_entry = mips_vxworks_exec_plt0_entry;
11262 /* Calculate the value of _GLOBAL_OFFSET_TABLE_. */
11263 got_value = (htab->root.hgot->root.u.def.section->output_section->vma
11264 + htab->root.hgot->root.u.def.section->output_offset
11265 + htab->root.hgot->root.u.def.value);
11267 got_value_high = ((got_value + 0x8000) >> 16) & 0xffff;
11268 got_value_low = got_value & 0xffff;
11270 /* Calculate the address of the PLT header. */
11271 plt_address = htab->splt->output_section->vma + htab->splt->output_offset;
11273 /* Install the PLT header. */
11274 loc = htab->splt->contents;
11275 bfd_put_32 (output_bfd, plt_entry[0] | got_value_high, loc);
11276 bfd_put_32 (output_bfd, plt_entry[1] | got_value_low, loc + 4);
11277 bfd_put_32 (output_bfd, plt_entry[2], loc + 8);
11278 bfd_put_32 (output_bfd, plt_entry[3], loc + 12);
11279 bfd_put_32 (output_bfd, plt_entry[4], loc + 16);
11280 bfd_put_32 (output_bfd, plt_entry[5], loc + 20);
11282 /* Output the relocation for the lui of %hi(_GLOBAL_OFFSET_TABLE_). */
11283 loc = htab->srelplt2->contents;
11284 rela.r_offset = plt_address;
11285 rela.r_info = ELF32_R_INFO (htab->root.hgot->indx, R_MIPS_HI16);
11287 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
11288 loc += sizeof (Elf32_External_Rela);
11290 /* Output the relocation for the following addiu of
11291 %lo(_GLOBAL_OFFSET_TABLE_). */
11292 rela.r_offset += 4;
11293 rela.r_info = ELF32_R_INFO (htab->root.hgot->indx, R_MIPS_LO16);
11294 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
11295 loc += sizeof (Elf32_External_Rela);
11297 /* Fix up the remaining relocations. They may have the wrong
11298 symbol index for _G_O_T_ or _P_L_T_ depending on the order
11299 in which symbols were output. */
11300 while (loc < htab->srelplt2->contents + htab->srelplt2->size)
11302 Elf_Internal_Rela rel;
11304 bfd_elf32_swap_reloca_in (output_bfd, loc, &rel);
11305 rel.r_info = ELF32_R_INFO (htab->root.hplt->indx, R_MIPS_32);
11306 bfd_elf32_swap_reloca_out (output_bfd, &rel, loc);
11307 loc += sizeof (Elf32_External_Rela);
11309 bfd_elf32_swap_reloca_in (output_bfd, loc, &rel);
11310 rel.r_info = ELF32_R_INFO (htab->root.hgot->indx, R_MIPS_HI16);
11311 bfd_elf32_swap_reloca_out (output_bfd, &rel, loc);
11312 loc += sizeof (Elf32_External_Rela);
11314 bfd_elf32_swap_reloca_in (output_bfd, loc, &rel);
11315 rel.r_info = ELF32_R_INFO (htab->root.hgot->indx, R_MIPS_LO16);
11316 bfd_elf32_swap_reloca_out (output_bfd, &rel, loc);
11317 loc += sizeof (Elf32_External_Rela);
11321 /* Install the PLT header for a VxWorks shared library. */
11324 mips_vxworks_finish_shared_plt (bfd *output_bfd, struct bfd_link_info *info)
11327 struct mips_elf_link_hash_table *htab;
11329 htab = mips_elf_hash_table (info);
11330 BFD_ASSERT (htab != NULL);
11332 /* We just need to copy the entry byte-by-byte. */
11333 for (i = 0; i < ARRAY_SIZE (mips_vxworks_shared_plt0_entry); i++)
11334 bfd_put_32 (output_bfd, mips_vxworks_shared_plt0_entry[i],
11335 htab->splt->contents + i * 4);
11338 /* Finish up the dynamic sections. */
11341 _bfd_mips_elf_finish_dynamic_sections (bfd *output_bfd,
11342 struct bfd_link_info *info)
11347 struct mips_got_info *gg, *g;
11348 struct mips_elf_link_hash_table *htab;
11350 htab = mips_elf_hash_table (info);
11351 BFD_ASSERT (htab != NULL);
11353 dynobj = elf_hash_table (info)->dynobj;
11355 sdyn = bfd_get_linker_section (dynobj, ".dynamic");
11358 gg = htab->got_info;
11360 if (elf_hash_table (info)->dynamic_sections_created)
11363 int dyn_to_skip = 0, dyn_skipped = 0;
11365 BFD_ASSERT (sdyn != NULL);
11366 BFD_ASSERT (gg != NULL);
11368 g = mips_elf_bfd_got (output_bfd, FALSE);
11369 BFD_ASSERT (g != NULL);
11371 for (b = sdyn->contents;
11372 b < sdyn->contents + sdyn->size;
11373 b += MIPS_ELF_DYN_SIZE (dynobj))
11375 Elf_Internal_Dyn dyn;
11379 bfd_boolean swap_out_p;
11381 /* Read in the current dynamic entry. */
11382 (*get_elf_backend_data (dynobj)->s->swap_dyn_in) (dynobj, b, &dyn);
11384 /* Assume that we're going to modify it and write it out. */
11390 dyn.d_un.d_val = MIPS_ELF_REL_SIZE (dynobj);
11394 BFD_ASSERT (htab->is_vxworks);
11395 dyn.d_un.d_val = MIPS_ELF_RELA_SIZE (dynobj);
11399 /* Rewrite DT_STRSZ. */
11401 _bfd_elf_strtab_size (elf_hash_table (info)->dynstr);
11406 dyn.d_un.d_ptr = s->output_section->vma + s->output_offset;
11409 case DT_MIPS_PLTGOT:
11411 dyn.d_un.d_ptr = s->output_section->vma + s->output_offset;
11414 case DT_MIPS_RLD_VERSION:
11415 dyn.d_un.d_val = 1; /* XXX */
11418 case DT_MIPS_FLAGS:
11419 dyn.d_un.d_val = RHF_NOTPOT; /* XXX */
11422 case DT_MIPS_TIME_STAMP:
11426 dyn.d_un.d_val = t;
11430 case DT_MIPS_ICHECKSUM:
11432 swap_out_p = FALSE;
11435 case DT_MIPS_IVERSION:
11437 swap_out_p = FALSE;
11440 case DT_MIPS_BASE_ADDRESS:
11441 s = output_bfd->sections;
11442 BFD_ASSERT (s != NULL);
11443 dyn.d_un.d_ptr = s->vma & ~(bfd_vma) 0xffff;
11446 case DT_MIPS_LOCAL_GOTNO:
11447 dyn.d_un.d_val = g->local_gotno;
11450 case DT_MIPS_UNREFEXTNO:
11451 /* The index into the dynamic symbol table which is the
11452 entry of the first external symbol that is not
11453 referenced within the same object. */
11454 dyn.d_un.d_val = bfd_count_sections (output_bfd) + 1;
11457 case DT_MIPS_GOTSYM:
11458 if (htab->global_gotsym)
11460 dyn.d_un.d_val = htab->global_gotsym->dynindx;
11463 /* In case if we don't have global got symbols we default
11464 to setting DT_MIPS_GOTSYM to the same value as
11465 DT_MIPS_SYMTABNO, so we just fall through. */
11467 case DT_MIPS_SYMTABNO:
11469 elemsize = MIPS_ELF_SYM_SIZE (output_bfd);
11470 s = bfd_get_linker_section (dynobj, name);
11473 dyn.d_un.d_val = s->size / elemsize;
11475 dyn.d_un.d_val = 0;
11478 case DT_MIPS_HIPAGENO:
11479 dyn.d_un.d_val = g->local_gotno - htab->reserved_gotno;
11482 case DT_MIPS_RLD_MAP:
11484 struct elf_link_hash_entry *h;
11485 h = mips_elf_hash_table (info)->rld_symbol;
11488 dyn_to_skip = MIPS_ELF_DYN_SIZE (dynobj);
11489 swap_out_p = FALSE;
11492 s = h->root.u.def.section;
11494 /* The MIPS_RLD_MAP tag stores the absolute address of the
11496 dyn.d_un.d_ptr = (s->output_section->vma + s->output_offset
11497 + h->root.u.def.value);
11501 case DT_MIPS_RLD_MAP_REL:
11503 struct elf_link_hash_entry *h;
11504 bfd_vma dt_addr, rld_addr;
11505 h = mips_elf_hash_table (info)->rld_symbol;
11508 dyn_to_skip = MIPS_ELF_DYN_SIZE (dynobj);
11509 swap_out_p = FALSE;
11512 s = h->root.u.def.section;
11514 /* The MIPS_RLD_MAP_REL tag stores the offset to the debug
11515 pointer, relative to the address of the tag. */
11516 dt_addr = (sdyn->output_section->vma + sdyn->output_offset
11517 + (b - sdyn->contents));
11518 rld_addr = (s->output_section->vma + s->output_offset
11519 + h->root.u.def.value);
11520 dyn.d_un.d_ptr = rld_addr - dt_addr;
11524 case DT_MIPS_OPTIONS:
11525 s = (bfd_get_section_by_name
11526 (output_bfd, MIPS_ELF_OPTIONS_SECTION_NAME (output_bfd)));
11527 dyn.d_un.d_ptr = s->vma;
11531 BFD_ASSERT (htab->is_vxworks);
11532 /* The count does not include the JUMP_SLOT relocations. */
11534 dyn.d_un.d_val -= htab->srelplt->size;
11538 BFD_ASSERT (htab->use_plts_and_copy_relocs);
11539 if (htab->is_vxworks)
11540 dyn.d_un.d_val = DT_RELA;
11542 dyn.d_un.d_val = DT_REL;
11546 BFD_ASSERT (htab->use_plts_and_copy_relocs);
11547 dyn.d_un.d_val = htab->srelplt->size;
11551 BFD_ASSERT (htab->use_plts_and_copy_relocs);
11552 dyn.d_un.d_ptr = (htab->srelplt->output_section->vma
11553 + htab->srelplt->output_offset);
11557 /* If we didn't need any text relocations after all, delete
11558 the dynamic tag. */
11559 if (!(info->flags & DF_TEXTREL))
11561 dyn_to_skip = MIPS_ELF_DYN_SIZE (dynobj);
11562 swap_out_p = FALSE;
11567 /* If we didn't need any text relocations after all, clear
11568 DF_TEXTREL from DT_FLAGS. */
11569 if (!(info->flags & DF_TEXTREL))
11570 dyn.d_un.d_val &= ~DF_TEXTREL;
11572 swap_out_p = FALSE;
11576 swap_out_p = FALSE;
11577 if (htab->is_vxworks
11578 && elf_vxworks_finish_dynamic_entry (output_bfd, &dyn))
11583 if (swap_out_p || dyn_skipped)
11584 (*get_elf_backend_data (dynobj)->s->swap_dyn_out)
11585 (dynobj, &dyn, b - dyn_skipped);
11589 dyn_skipped += dyn_to_skip;
11594 /* Wipe out any trailing entries if we shifted down a dynamic tag. */
11595 if (dyn_skipped > 0)
11596 memset (b - dyn_skipped, 0, dyn_skipped);
11599 if (sgot != NULL && sgot->size > 0
11600 && !bfd_is_abs_section (sgot->output_section))
11602 if (htab->is_vxworks)
11604 /* The first entry of the global offset table points to the
11605 ".dynamic" section. The second is initialized by the
11606 loader and contains the shared library identifier.
11607 The third is also initialized by the loader and points
11608 to the lazy resolution stub. */
11609 MIPS_ELF_PUT_WORD (output_bfd,
11610 sdyn->output_offset + sdyn->output_section->vma,
11612 MIPS_ELF_PUT_WORD (output_bfd, 0,
11613 sgot->contents + MIPS_ELF_GOT_SIZE (output_bfd));
11614 MIPS_ELF_PUT_WORD (output_bfd, 0,
11616 + 2 * MIPS_ELF_GOT_SIZE (output_bfd));
11620 /* The first entry of the global offset table will be filled at
11621 runtime. The second entry will be used by some runtime loaders.
11622 This isn't the case of IRIX rld. */
11623 MIPS_ELF_PUT_WORD (output_bfd, (bfd_vma) 0, sgot->contents);
11624 MIPS_ELF_PUT_WORD (output_bfd, MIPS_ELF_GNU_GOT1_MASK (output_bfd),
11625 sgot->contents + MIPS_ELF_GOT_SIZE (output_bfd));
11628 elf_section_data (sgot->output_section)->this_hdr.sh_entsize
11629 = MIPS_ELF_GOT_SIZE (output_bfd);
11632 /* Generate dynamic relocations for the non-primary gots. */
11633 if (gg != NULL && gg->next)
11635 Elf_Internal_Rela rel[3];
11636 bfd_vma addend = 0;
11638 memset (rel, 0, sizeof (rel));
11639 rel[0].r_info = ELF_R_INFO (output_bfd, 0, R_MIPS_REL32);
11641 for (g = gg->next; g->next != gg; g = g->next)
11643 bfd_vma got_index = g->next->local_gotno + g->next->global_gotno
11644 + g->next->tls_gotno;
11646 MIPS_ELF_PUT_WORD (output_bfd, 0, sgot->contents
11647 + got_index++ * MIPS_ELF_GOT_SIZE (output_bfd));
11648 MIPS_ELF_PUT_WORD (output_bfd, MIPS_ELF_GNU_GOT1_MASK (output_bfd),
11650 + got_index++ * MIPS_ELF_GOT_SIZE (output_bfd));
11652 if (! bfd_link_pic (info))
11655 for (; got_index < g->local_gotno; got_index++)
11657 if (got_index >= g->assigned_low_gotno
11658 && got_index <= g->assigned_high_gotno)
11661 rel[0].r_offset = rel[1].r_offset = rel[2].r_offset
11662 = got_index * MIPS_ELF_GOT_SIZE (output_bfd);
11663 if (!(mips_elf_create_dynamic_relocation
11664 (output_bfd, info, rel, NULL,
11665 bfd_abs_section_ptr,
11666 0, &addend, sgot)))
11668 BFD_ASSERT (addend == 0);
11673 /* The generation of dynamic relocations for the non-primary gots
11674 adds more dynamic relocations. We cannot count them until
11677 if (elf_hash_table (info)->dynamic_sections_created)
11680 bfd_boolean swap_out_p;
11682 BFD_ASSERT (sdyn != NULL);
11684 for (b = sdyn->contents;
11685 b < sdyn->contents + sdyn->size;
11686 b += MIPS_ELF_DYN_SIZE (dynobj))
11688 Elf_Internal_Dyn dyn;
11691 /* Read in the current dynamic entry. */
11692 (*get_elf_backend_data (dynobj)->s->swap_dyn_in) (dynobj, b, &dyn);
11694 /* Assume that we're going to modify it and write it out. */
11700 /* Reduce DT_RELSZ to account for any relocations we
11701 decided not to make. This is for the n64 irix rld,
11702 which doesn't seem to apply any relocations if there
11703 are trailing null entries. */
11704 s = mips_elf_rel_dyn_section (info, FALSE);
11705 dyn.d_un.d_val = (s->reloc_count
11706 * (ABI_64_P (output_bfd)
11707 ? sizeof (Elf64_Mips_External_Rel)
11708 : sizeof (Elf32_External_Rel)));
11709 /* Adjust the section size too. Tools like the prelinker
11710 can reasonably expect the values to the same. */
11711 elf_section_data (s->output_section)->this_hdr.sh_size
11716 swap_out_p = FALSE;
11721 (*get_elf_backend_data (dynobj)->s->swap_dyn_out)
11728 Elf32_compact_rel cpt;
11730 if (SGI_COMPAT (output_bfd))
11732 /* Write .compact_rel section out. */
11733 s = bfd_get_linker_section (dynobj, ".compact_rel");
11737 cpt.num = s->reloc_count;
11739 cpt.offset = (s->output_section->filepos
11740 + sizeof (Elf32_External_compact_rel));
11743 bfd_elf32_swap_compact_rel_out (output_bfd, &cpt,
11744 ((Elf32_External_compact_rel *)
11747 /* Clean up a dummy stub function entry in .text. */
11748 if (htab->sstubs != NULL)
11750 file_ptr dummy_offset;
11752 BFD_ASSERT (htab->sstubs->size >= htab->function_stub_size);
11753 dummy_offset = htab->sstubs->size - htab->function_stub_size;
11754 memset (htab->sstubs->contents + dummy_offset, 0,
11755 htab->function_stub_size);
11760 /* The psABI says that the dynamic relocations must be sorted in
11761 increasing order of r_symndx. The VxWorks EABI doesn't require
11762 this, and because the code below handles REL rather than RELA
11763 relocations, using it for VxWorks would be outright harmful. */
11764 if (!htab->is_vxworks)
11766 s = mips_elf_rel_dyn_section (info, FALSE);
11768 && s->size > (bfd_vma)2 * MIPS_ELF_REL_SIZE (output_bfd))
11770 reldyn_sorting_bfd = output_bfd;
11772 if (ABI_64_P (output_bfd))
11773 qsort ((Elf64_External_Rel *) s->contents + 1,
11774 s->reloc_count - 1, sizeof (Elf64_Mips_External_Rel),
11775 sort_dynamic_relocs_64);
11777 qsort ((Elf32_External_Rel *) s->contents + 1,
11778 s->reloc_count - 1, sizeof (Elf32_External_Rel),
11779 sort_dynamic_relocs);
11784 if (htab->splt && htab->splt->size > 0)
11786 if (htab->is_vxworks)
11788 if (bfd_link_pic (info))
11789 mips_vxworks_finish_shared_plt (output_bfd, info);
11791 mips_vxworks_finish_exec_plt (output_bfd, info);
11795 BFD_ASSERT (!bfd_link_pic (info));
11796 if (!mips_finish_exec_plt (output_bfd, info))
11804 /* Set ABFD's EF_MIPS_ARCH and EF_MIPS_MACH flags. */
11807 mips_set_isa_flags (bfd *abfd)
11811 switch (bfd_get_mach (abfd))
11814 case bfd_mach_mips3000:
11815 val = E_MIPS_ARCH_1;
11818 case bfd_mach_mips3900:
11819 val = E_MIPS_ARCH_1 | E_MIPS_MACH_3900;
11822 case bfd_mach_mips6000:
11823 val = E_MIPS_ARCH_2;
11826 case bfd_mach_mips4000:
11827 case bfd_mach_mips4300:
11828 case bfd_mach_mips4400:
11829 case bfd_mach_mips4600:
11830 val = E_MIPS_ARCH_3;
11833 case bfd_mach_mips4010:
11834 val = E_MIPS_ARCH_3 | E_MIPS_MACH_4010;
11837 case bfd_mach_mips4100:
11838 val = E_MIPS_ARCH_3 | E_MIPS_MACH_4100;
11841 case bfd_mach_mips4111:
11842 val = E_MIPS_ARCH_3 | E_MIPS_MACH_4111;
11845 case bfd_mach_mips4120:
11846 val = E_MIPS_ARCH_3 | E_MIPS_MACH_4120;
11849 case bfd_mach_mips4650:
11850 val = E_MIPS_ARCH_3 | E_MIPS_MACH_4650;
11853 case bfd_mach_mips5400:
11854 val = E_MIPS_ARCH_4 | E_MIPS_MACH_5400;
11857 case bfd_mach_mips5500:
11858 val = E_MIPS_ARCH_4 | E_MIPS_MACH_5500;
11861 case bfd_mach_mips5900:
11862 val = E_MIPS_ARCH_3 | E_MIPS_MACH_5900;
11865 case bfd_mach_mips9000:
11866 val = E_MIPS_ARCH_4 | E_MIPS_MACH_9000;
11869 case bfd_mach_mips5000:
11870 case bfd_mach_mips7000:
11871 case bfd_mach_mips8000:
11872 case bfd_mach_mips10000:
11873 case bfd_mach_mips12000:
11874 case bfd_mach_mips14000:
11875 case bfd_mach_mips16000:
11876 val = E_MIPS_ARCH_4;
11879 case bfd_mach_mips5:
11880 val = E_MIPS_ARCH_5;
11883 case bfd_mach_mips_loongson_2e:
11884 val = E_MIPS_ARCH_3 | E_MIPS_MACH_LS2E;
11887 case bfd_mach_mips_loongson_2f:
11888 val = E_MIPS_ARCH_3 | E_MIPS_MACH_LS2F;
11891 case bfd_mach_mips_sb1:
11892 val = E_MIPS_ARCH_64 | E_MIPS_MACH_SB1;
11895 case bfd_mach_mips_loongson_3a:
11896 val = E_MIPS_ARCH_64R2 | E_MIPS_MACH_LS3A;
11899 case bfd_mach_mips_octeon:
11900 case bfd_mach_mips_octeonp:
11901 val = E_MIPS_ARCH_64R2 | E_MIPS_MACH_OCTEON;
11904 case bfd_mach_mips_octeon3:
11905 val = E_MIPS_ARCH_64R2 | E_MIPS_MACH_OCTEON3;
11908 case bfd_mach_mips_xlr:
11909 val = E_MIPS_ARCH_64 | E_MIPS_MACH_XLR;
11912 case bfd_mach_mips_octeon2:
11913 val = E_MIPS_ARCH_64R2 | E_MIPS_MACH_OCTEON2;
11916 case bfd_mach_mipsisa32:
11917 val = E_MIPS_ARCH_32;
11920 case bfd_mach_mipsisa64:
11921 val = E_MIPS_ARCH_64;
11924 case bfd_mach_mipsisa32r2:
11925 case bfd_mach_mipsisa32r3:
11926 case bfd_mach_mipsisa32r5:
11927 val = E_MIPS_ARCH_32R2;
11930 case bfd_mach_mipsisa64r2:
11931 case bfd_mach_mipsisa64r3:
11932 case bfd_mach_mipsisa64r5:
11933 val = E_MIPS_ARCH_64R2;
11936 case bfd_mach_mipsisa32r6:
11937 val = E_MIPS_ARCH_32R6;
11940 case bfd_mach_mipsisa64r6:
11941 val = E_MIPS_ARCH_64R6;
11944 elf_elfheader (abfd)->e_flags &= ~(EF_MIPS_ARCH | EF_MIPS_MACH);
11945 elf_elfheader (abfd)->e_flags |= val;
11950 /* Whether to sort relocs output by ld -r or ld --emit-relocs, by r_offset.
11951 Don't do so for code sections. We want to keep ordering of HI16/LO16
11952 as is. On the other hand, elf-eh-frame.c processing requires .eh_frame
11953 relocs to be sorted. */
11956 _bfd_mips_elf_sort_relocs_p (asection *sec)
11958 return (sec->flags & SEC_CODE) == 0;
11962 /* The final processing done just before writing out a MIPS ELF object
11963 file. This gets the MIPS architecture right based on the machine
11964 number. This is used by both the 32-bit and the 64-bit ABI. */
11967 _bfd_mips_elf_final_write_processing (bfd *abfd,
11968 bfd_boolean linker ATTRIBUTE_UNUSED)
11971 Elf_Internal_Shdr **hdrpp;
11975 /* Keep the existing EF_MIPS_MACH and EF_MIPS_ARCH flags if the former
11976 is nonzero. This is for compatibility with old objects, which used
11977 a combination of a 32-bit EF_MIPS_ARCH and a 64-bit EF_MIPS_MACH. */
11978 if ((elf_elfheader (abfd)->e_flags & EF_MIPS_MACH) == 0)
11979 mips_set_isa_flags (abfd);
11981 /* Set the sh_info field for .gptab sections and other appropriate
11982 info for each special section. */
11983 for (i = 1, hdrpp = elf_elfsections (abfd) + 1;
11984 i < elf_numsections (abfd);
11987 switch ((*hdrpp)->sh_type)
11989 case SHT_MIPS_MSYM:
11990 case SHT_MIPS_LIBLIST:
11991 sec = bfd_get_section_by_name (abfd, ".dynstr");
11993 (*hdrpp)->sh_link = elf_section_data (sec)->this_idx;
11996 case SHT_MIPS_GPTAB:
11997 BFD_ASSERT ((*hdrpp)->bfd_section != NULL);
11998 name = bfd_get_section_name (abfd, (*hdrpp)->bfd_section);
11999 BFD_ASSERT (name != NULL
12000 && CONST_STRNEQ (name, ".gptab."));
12001 sec = bfd_get_section_by_name (abfd, name + sizeof ".gptab" - 1);
12002 BFD_ASSERT (sec != NULL);
12003 (*hdrpp)->sh_info = elf_section_data (sec)->this_idx;
12006 case SHT_MIPS_CONTENT:
12007 BFD_ASSERT ((*hdrpp)->bfd_section != NULL);
12008 name = bfd_get_section_name (abfd, (*hdrpp)->bfd_section);
12009 BFD_ASSERT (name != NULL
12010 && CONST_STRNEQ (name, ".MIPS.content"));
12011 sec = bfd_get_section_by_name (abfd,
12012 name + sizeof ".MIPS.content" - 1);
12013 BFD_ASSERT (sec != NULL);
12014 (*hdrpp)->sh_link = elf_section_data (sec)->this_idx;
12017 case SHT_MIPS_SYMBOL_LIB:
12018 sec = bfd_get_section_by_name (abfd, ".dynsym");
12020 (*hdrpp)->sh_link = elf_section_data (sec)->this_idx;
12021 sec = bfd_get_section_by_name (abfd, ".liblist");
12023 (*hdrpp)->sh_info = elf_section_data (sec)->this_idx;
12026 case SHT_MIPS_EVENTS:
12027 BFD_ASSERT ((*hdrpp)->bfd_section != NULL);
12028 name = bfd_get_section_name (abfd, (*hdrpp)->bfd_section);
12029 BFD_ASSERT (name != NULL);
12030 if (CONST_STRNEQ (name, ".MIPS.events"))
12031 sec = bfd_get_section_by_name (abfd,
12032 name + sizeof ".MIPS.events" - 1);
12035 BFD_ASSERT (CONST_STRNEQ (name, ".MIPS.post_rel"));
12036 sec = bfd_get_section_by_name (abfd,
12038 + sizeof ".MIPS.post_rel" - 1));
12040 BFD_ASSERT (sec != NULL);
12041 (*hdrpp)->sh_link = elf_section_data (sec)->this_idx;
12048 /* When creating an IRIX5 executable, we need REGINFO and RTPROC
12052 _bfd_mips_elf_additional_program_headers (bfd *abfd,
12053 struct bfd_link_info *info ATTRIBUTE_UNUSED)
12058 /* See if we need a PT_MIPS_REGINFO segment. */
12059 s = bfd_get_section_by_name (abfd, ".reginfo");
12060 if (s && (s->flags & SEC_LOAD))
12063 /* See if we need a PT_MIPS_ABIFLAGS segment. */
12064 if (bfd_get_section_by_name (abfd, ".MIPS.abiflags"))
12067 /* See if we need a PT_MIPS_OPTIONS segment. */
12068 if (IRIX_COMPAT (abfd) == ict_irix6
12069 && bfd_get_section_by_name (abfd,
12070 MIPS_ELF_OPTIONS_SECTION_NAME (abfd)))
12073 /* See if we need a PT_MIPS_RTPROC segment. */
12074 if (IRIX_COMPAT (abfd) == ict_irix5
12075 && bfd_get_section_by_name (abfd, ".dynamic")
12076 && bfd_get_section_by_name (abfd, ".mdebug"))
12079 /* Allocate a PT_NULL header in dynamic objects. See
12080 _bfd_mips_elf_modify_segment_map for details. */
12081 if (!SGI_COMPAT (abfd)
12082 && bfd_get_section_by_name (abfd, ".dynamic"))
12088 /* Modify the segment map for an IRIX5 executable. */
12091 _bfd_mips_elf_modify_segment_map (bfd *abfd,
12092 struct bfd_link_info *info)
12095 struct elf_segment_map *m, **pm;
12098 /* If there is a .reginfo section, we need a PT_MIPS_REGINFO
12100 s = bfd_get_section_by_name (abfd, ".reginfo");
12101 if (s != NULL && (s->flags & SEC_LOAD) != 0)
12103 for (m = elf_seg_map (abfd); m != NULL; m = m->next)
12104 if (m->p_type == PT_MIPS_REGINFO)
12109 m = bfd_zalloc (abfd, amt);
12113 m->p_type = PT_MIPS_REGINFO;
12115 m->sections[0] = s;
12117 /* We want to put it after the PHDR and INTERP segments. */
12118 pm = &elf_seg_map (abfd);
12120 && ((*pm)->p_type == PT_PHDR
12121 || (*pm)->p_type == PT_INTERP))
12129 /* If there is a .MIPS.abiflags section, we need a PT_MIPS_ABIFLAGS
12131 s = bfd_get_section_by_name (abfd, ".MIPS.abiflags");
12132 if (s != NULL && (s->flags & SEC_LOAD) != 0)
12134 for (m = elf_seg_map (abfd); m != NULL; m = m->next)
12135 if (m->p_type == PT_MIPS_ABIFLAGS)
12140 m = bfd_zalloc (abfd, amt);
12144 m->p_type = PT_MIPS_ABIFLAGS;
12146 m->sections[0] = s;
12148 /* We want to put it after the PHDR and INTERP segments. */
12149 pm = &elf_seg_map (abfd);
12151 && ((*pm)->p_type == PT_PHDR
12152 || (*pm)->p_type == PT_INTERP))
12160 /* For IRIX 6, we don't have .mdebug sections, nor does anything but
12161 .dynamic end up in PT_DYNAMIC. However, we do have to insert a
12162 PT_MIPS_OPTIONS segment immediately following the program header
12164 if (NEWABI_P (abfd)
12165 /* On non-IRIX6 new abi, we'll have already created a segment
12166 for this section, so don't create another. I'm not sure this
12167 is not also the case for IRIX 6, but I can't test it right
12169 && IRIX_COMPAT (abfd) == ict_irix6)
12171 for (s = abfd->sections; s; s = s->next)
12172 if (elf_section_data (s)->this_hdr.sh_type == SHT_MIPS_OPTIONS)
12177 struct elf_segment_map *options_segment;
12179 pm = &elf_seg_map (abfd);
12181 && ((*pm)->p_type == PT_PHDR
12182 || (*pm)->p_type == PT_INTERP))
12185 if (*pm == NULL || (*pm)->p_type != PT_MIPS_OPTIONS)
12187 amt = sizeof (struct elf_segment_map);
12188 options_segment = bfd_zalloc (abfd, amt);
12189 options_segment->next = *pm;
12190 options_segment->p_type = PT_MIPS_OPTIONS;
12191 options_segment->p_flags = PF_R;
12192 options_segment->p_flags_valid = TRUE;
12193 options_segment->count = 1;
12194 options_segment->sections[0] = s;
12195 *pm = options_segment;
12201 if (IRIX_COMPAT (abfd) == ict_irix5)
12203 /* If there are .dynamic and .mdebug sections, we make a room
12204 for the RTPROC header. FIXME: Rewrite without section names. */
12205 if (bfd_get_section_by_name (abfd, ".interp") == NULL
12206 && bfd_get_section_by_name (abfd, ".dynamic") != NULL
12207 && bfd_get_section_by_name (abfd, ".mdebug") != NULL)
12209 for (m = elf_seg_map (abfd); m != NULL; m = m->next)
12210 if (m->p_type == PT_MIPS_RTPROC)
12215 m = bfd_zalloc (abfd, amt);
12219 m->p_type = PT_MIPS_RTPROC;
12221 s = bfd_get_section_by_name (abfd, ".rtproc");
12226 m->p_flags_valid = 1;
12231 m->sections[0] = s;
12234 /* We want to put it after the DYNAMIC segment. */
12235 pm = &elf_seg_map (abfd);
12236 while (*pm != NULL && (*pm)->p_type != PT_DYNAMIC)
12246 /* On IRIX5, the PT_DYNAMIC segment includes the .dynamic,
12247 .dynstr, .dynsym, and .hash sections, and everything in
12249 for (pm = &elf_seg_map (abfd); *pm != NULL;
12251 if ((*pm)->p_type == PT_DYNAMIC)
12254 /* GNU/Linux binaries do not need the extended PT_DYNAMIC section.
12255 glibc's dynamic linker has traditionally derived the number of
12256 tags from the p_filesz field, and sometimes allocates stack
12257 arrays of that size. An overly-big PT_DYNAMIC segment can
12258 be actively harmful in such cases. Making PT_DYNAMIC contain
12259 other sections can also make life hard for the prelinker,
12260 which might move one of the other sections to a different
12261 PT_LOAD segment. */
12262 if (SGI_COMPAT (abfd)
12265 && strcmp (m->sections[0]->name, ".dynamic") == 0)
12267 static const char *sec_names[] =
12269 ".dynamic", ".dynstr", ".dynsym", ".hash"
12273 struct elf_segment_map *n;
12275 low = ~(bfd_vma) 0;
12277 for (i = 0; i < sizeof sec_names / sizeof sec_names[0]; i++)
12279 s = bfd_get_section_by_name (abfd, sec_names[i]);
12280 if (s != NULL && (s->flags & SEC_LOAD) != 0)
12287 if (high < s->vma + sz)
12288 high = s->vma + sz;
12293 for (s = abfd->sections; s != NULL; s = s->next)
12294 if ((s->flags & SEC_LOAD) != 0
12296 && s->vma + s->size <= high)
12299 amt = sizeof *n + (bfd_size_type) (c - 1) * sizeof (asection *);
12300 n = bfd_zalloc (abfd, amt);
12307 for (s = abfd->sections; s != NULL; s = s->next)
12309 if ((s->flags & SEC_LOAD) != 0
12311 && s->vma + s->size <= high)
12313 n->sections[i] = s;
12322 /* Allocate a spare program header in dynamic objects so that tools
12323 like the prelinker can add an extra PT_LOAD entry.
12325 If the prelinker needs to make room for a new PT_LOAD entry, its
12326 standard procedure is to move the first (read-only) sections into
12327 the new (writable) segment. However, the MIPS ABI requires
12328 .dynamic to be in a read-only segment, and the section will often
12329 start within sizeof (ElfNN_Phdr) bytes of the last program header.
12331 Although the prelinker could in principle move .dynamic to a
12332 writable segment, it seems better to allocate a spare program
12333 header instead, and avoid the need to move any sections.
12334 There is a long tradition of allocating spare dynamic tags,
12335 so allocating a spare program header seems like a natural
12338 If INFO is NULL, we may be copying an already prelinked binary
12339 with objcopy or strip, so do not add this header. */
12341 && !SGI_COMPAT (abfd)
12342 && bfd_get_section_by_name (abfd, ".dynamic"))
12344 for (pm = &elf_seg_map (abfd); *pm != NULL; pm = &(*pm)->next)
12345 if ((*pm)->p_type == PT_NULL)
12349 m = bfd_zalloc (abfd, sizeof (*m));
12353 m->p_type = PT_NULL;
12361 /* Return the section that should be marked against GC for a given
12365 _bfd_mips_elf_gc_mark_hook (asection *sec,
12366 struct bfd_link_info *info,
12367 Elf_Internal_Rela *rel,
12368 struct elf_link_hash_entry *h,
12369 Elf_Internal_Sym *sym)
12371 /* ??? Do mips16 stub sections need to be handled special? */
12374 switch (ELF_R_TYPE (sec->owner, rel->r_info))
12376 case R_MIPS_GNU_VTINHERIT:
12377 case R_MIPS_GNU_VTENTRY:
12381 return _bfd_elf_gc_mark_hook (sec, info, rel, h, sym);
12384 /* Update the got entry reference counts for the section being removed. */
12387 _bfd_mips_elf_gc_sweep_hook (bfd *abfd ATTRIBUTE_UNUSED,
12388 struct bfd_link_info *info ATTRIBUTE_UNUSED,
12389 asection *sec ATTRIBUTE_UNUSED,
12390 const Elf_Internal_Rela *relocs ATTRIBUTE_UNUSED)
12393 Elf_Internal_Shdr *symtab_hdr;
12394 struct elf_link_hash_entry **sym_hashes;
12395 bfd_signed_vma *local_got_refcounts;
12396 const Elf_Internal_Rela *rel, *relend;
12397 unsigned long r_symndx;
12398 struct elf_link_hash_entry *h;
12400 if (bfd_link_relocatable (info))
12403 symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
12404 sym_hashes = elf_sym_hashes (abfd);
12405 local_got_refcounts = elf_local_got_refcounts (abfd);
12407 relend = relocs + sec->reloc_count;
12408 for (rel = relocs; rel < relend; rel++)
12409 switch (ELF_R_TYPE (abfd, rel->r_info))
12411 case R_MIPS16_GOT16:
12412 case R_MIPS16_CALL16:
12414 case R_MIPS_CALL16:
12415 case R_MIPS_CALL_HI16:
12416 case R_MIPS_CALL_LO16:
12417 case R_MIPS_GOT_HI16:
12418 case R_MIPS_GOT_LO16:
12419 case R_MIPS_GOT_DISP:
12420 case R_MIPS_GOT_PAGE:
12421 case R_MIPS_GOT_OFST:
12422 case R_MICROMIPS_GOT16:
12423 case R_MICROMIPS_CALL16:
12424 case R_MICROMIPS_CALL_HI16:
12425 case R_MICROMIPS_CALL_LO16:
12426 case R_MICROMIPS_GOT_HI16:
12427 case R_MICROMIPS_GOT_LO16:
12428 case R_MICROMIPS_GOT_DISP:
12429 case R_MICROMIPS_GOT_PAGE:
12430 case R_MICROMIPS_GOT_OFST:
12431 /* ??? It would seem that the existing MIPS code does no sort
12432 of reference counting or whatnot on its GOT and PLT entries,
12433 so it is not possible to garbage collect them at this time. */
12444 /* Prevent .MIPS.abiflags from being discarded with --gc-sections. */
12447 _bfd_mips_elf_gc_mark_extra_sections (struct bfd_link_info *info,
12448 elf_gc_mark_hook_fn gc_mark_hook)
12452 _bfd_elf_gc_mark_extra_sections (info, gc_mark_hook);
12454 for (sub = info->input_bfds; sub != NULL; sub = sub->link.next)
12458 if (! is_mips_elf (sub))
12461 for (o = sub->sections; o != NULL; o = o->next)
12463 && MIPS_ELF_ABIFLAGS_SECTION_NAME_P
12464 (bfd_get_section_name (sub, o)))
12466 if (!_bfd_elf_gc_mark (info, o, gc_mark_hook))
12474 /* Copy data from a MIPS ELF indirect symbol to its direct symbol,
12475 hiding the old indirect symbol. Process additional relocation
12476 information. Also called for weakdefs, in which case we just let
12477 _bfd_elf_link_hash_copy_indirect copy the flags for us. */
12480 _bfd_mips_elf_copy_indirect_symbol (struct bfd_link_info *info,
12481 struct elf_link_hash_entry *dir,
12482 struct elf_link_hash_entry *ind)
12484 struct mips_elf_link_hash_entry *dirmips, *indmips;
12486 _bfd_elf_link_hash_copy_indirect (info, dir, ind);
12488 dirmips = (struct mips_elf_link_hash_entry *) dir;
12489 indmips = (struct mips_elf_link_hash_entry *) ind;
12490 /* Any absolute non-dynamic relocations against an indirect or weak
12491 definition will be against the target symbol. */
12492 if (indmips->has_static_relocs)
12493 dirmips->has_static_relocs = TRUE;
12495 if (ind->root.type != bfd_link_hash_indirect)
12498 dirmips->possibly_dynamic_relocs += indmips->possibly_dynamic_relocs;
12499 if (indmips->readonly_reloc)
12500 dirmips->readonly_reloc = TRUE;
12501 if (indmips->no_fn_stub)
12502 dirmips->no_fn_stub = TRUE;
12503 if (indmips->fn_stub)
12505 dirmips->fn_stub = indmips->fn_stub;
12506 indmips->fn_stub = NULL;
12508 if (indmips->need_fn_stub)
12510 dirmips->need_fn_stub = TRUE;
12511 indmips->need_fn_stub = FALSE;
12513 if (indmips->call_stub)
12515 dirmips->call_stub = indmips->call_stub;
12516 indmips->call_stub = NULL;
12518 if (indmips->call_fp_stub)
12520 dirmips->call_fp_stub = indmips->call_fp_stub;
12521 indmips->call_fp_stub = NULL;
12523 if (indmips->global_got_area < dirmips->global_got_area)
12524 dirmips->global_got_area = indmips->global_got_area;
12525 if (indmips->global_got_area < GGA_NONE)
12526 indmips->global_got_area = GGA_NONE;
12527 if (indmips->has_nonpic_branches)
12528 dirmips->has_nonpic_branches = TRUE;
12531 #define PDR_SIZE 32
12534 _bfd_mips_elf_discard_info (bfd *abfd, struct elf_reloc_cookie *cookie,
12535 struct bfd_link_info *info)
12538 bfd_boolean ret = FALSE;
12539 unsigned char *tdata;
12542 o = bfd_get_section_by_name (abfd, ".pdr");
12547 if (o->size % PDR_SIZE != 0)
12549 if (o->output_section != NULL
12550 && bfd_is_abs_section (o->output_section))
12553 tdata = bfd_zmalloc (o->size / PDR_SIZE);
12557 cookie->rels = _bfd_elf_link_read_relocs (abfd, o, NULL, NULL,
12558 info->keep_memory);
12565 cookie->rel = cookie->rels;
12566 cookie->relend = cookie->rels + o->reloc_count;
12568 for (i = 0, skip = 0; i < o->size / PDR_SIZE; i ++)
12570 if (bfd_elf_reloc_symbol_deleted_p (i * PDR_SIZE, cookie))
12579 mips_elf_section_data (o)->u.tdata = tdata;
12580 if (o->rawsize == 0)
12581 o->rawsize = o->size;
12582 o->size -= skip * PDR_SIZE;
12588 if (! info->keep_memory)
12589 free (cookie->rels);
12595 _bfd_mips_elf_ignore_discarded_relocs (asection *sec)
12597 if (strcmp (sec->name, ".pdr") == 0)
12603 _bfd_mips_elf_write_section (bfd *output_bfd,
12604 struct bfd_link_info *link_info ATTRIBUTE_UNUSED,
12605 asection *sec, bfd_byte *contents)
12607 bfd_byte *to, *from, *end;
12610 if (strcmp (sec->name, ".pdr") != 0)
12613 if (mips_elf_section_data (sec)->u.tdata == NULL)
12617 end = contents + sec->size;
12618 for (from = contents, i = 0;
12620 from += PDR_SIZE, i++)
12622 if ((mips_elf_section_data (sec)->u.tdata)[i] == 1)
12625 memcpy (to, from, PDR_SIZE);
12628 bfd_set_section_contents (output_bfd, sec->output_section, contents,
12629 sec->output_offset, sec->size);
12633 /* microMIPS code retains local labels for linker relaxation. Omit them
12634 from output by default for clarity. */
12637 _bfd_mips_elf_is_target_special_symbol (bfd *abfd, asymbol *sym)
12639 return _bfd_elf_is_local_label_name (abfd, sym->name);
12642 /* MIPS ELF uses a special find_nearest_line routine in order the
12643 handle the ECOFF debugging information. */
12645 struct mips_elf_find_line
12647 struct ecoff_debug_info d;
12648 struct ecoff_find_line i;
12652 _bfd_mips_elf_find_nearest_line (bfd *abfd, asymbol **symbols,
12653 asection *section, bfd_vma offset,
12654 const char **filename_ptr,
12655 const char **functionname_ptr,
12656 unsigned int *line_ptr,
12657 unsigned int *discriminator_ptr)
12661 if (_bfd_dwarf2_find_nearest_line (abfd, symbols, NULL, section, offset,
12662 filename_ptr, functionname_ptr,
12663 line_ptr, discriminator_ptr,
12664 dwarf_debug_sections,
12665 ABI_64_P (abfd) ? 8 : 0,
12666 &elf_tdata (abfd)->dwarf2_find_line_info))
12669 if (_bfd_dwarf1_find_nearest_line (abfd, symbols, section, offset,
12670 filename_ptr, functionname_ptr,
12674 msec = bfd_get_section_by_name (abfd, ".mdebug");
12677 flagword origflags;
12678 struct mips_elf_find_line *fi;
12679 const struct ecoff_debug_swap * const swap =
12680 get_elf_backend_data (abfd)->elf_backend_ecoff_debug_swap;
12682 /* If we are called during a link, mips_elf_final_link may have
12683 cleared the SEC_HAS_CONTENTS field. We force it back on here
12684 if appropriate (which it normally will be). */
12685 origflags = msec->flags;
12686 if (elf_section_data (msec)->this_hdr.sh_type != SHT_NOBITS)
12687 msec->flags |= SEC_HAS_CONTENTS;
12689 fi = mips_elf_tdata (abfd)->find_line_info;
12692 bfd_size_type external_fdr_size;
12695 struct fdr *fdr_ptr;
12696 bfd_size_type amt = sizeof (struct mips_elf_find_line);
12698 fi = bfd_zalloc (abfd, amt);
12701 msec->flags = origflags;
12705 if (! _bfd_mips_elf_read_ecoff_info (abfd, msec, &fi->d))
12707 msec->flags = origflags;
12711 /* Swap in the FDR information. */
12712 amt = fi->d.symbolic_header.ifdMax * sizeof (struct fdr);
12713 fi->d.fdr = bfd_alloc (abfd, amt);
12714 if (fi->d.fdr == NULL)
12716 msec->flags = origflags;
12719 external_fdr_size = swap->external_fdr_size;
12720 fdr_ptr = fi->d.fdr;
12721 fraw_src = (char *) fi->d.external_fdr;
12722 fraw_end = (fraw_src
12723 + fi->d.symbolic_header.ifdMax * external_fdr_size);
12724 for (; fraw_src < fraw_end; fraw_src += external_fdr_size, fdr_ptr++)
12725 (*swap->swap_fdr_in) (abfd, fraw_src, fdr_ptr);
12727 mips_elf_tdata (abfd)->find_line_info = fi;
12729 /* Note that we don't bother to ever free this information.
12730 find_nearest_line is either called all the time, as in
12731 objdump -l, so the information should be saved, or it is
12732 rarely called, as in ld error messages, so the memory
12733 wasted is unimportant. Still, it would probably be a
12734 good idea for free_cached_info to throw it away. */
12737 if (_bfd_ecoff_locate_line (abfd, section, offset, &fi->d, swap,
12738 &fi->i, filename_ptr, functionname_ptr,
12741 msec->flags = origflags;
12745 msec->flags = origflags;
12748 /* Fall back on the generic ELF find_nearest_line routine. */
12750 return _bfd_elf_find_nearest_line (abfd, symbols, section, offset,
12751 filename_ptr, functionname_ptr,
12752 line_ptr, discriminator_ptr);
12756 _bfd_mips_elf_find_inliner_info (bfd *abfd,
12757 const char **filename_ptr,
12758 const char **functionname_ptr,
12759 unsigned int *line_ptr)
12762 found = _bfd_dwarf2_find_inliner_info (abfd, filename_ptr,
12763 functionname_ptr, line_ptr,
12764 & elf_tdata (abfd)->dwarf2_find_line_info);
12769 /* When are writing out the .options or .MIPS.options section,
12770 remember the bytes we are writing out, so that we can install the
12771 GP value in the section_processing routine. */
12774 _bfd_mips_elf_set_section_contents (bfd *abfd, sec_ptr section,
12775 const void *location,
12776 file_ptr offset, bfd_size_type count)
12778 if (MIPS_ELF_OPTIONS_SECTION_NAME_P (section->name))
12782 if (elf_section_data (section) == NULL)
12784 bfd_size_type amt = sizeof (struct bfd_elf_section_data);
12785 section->used_by_bfd = bfd_zalloc (abfd, amt);
12786 if (elf_section_data (section) == NULL)
12789 c = mips_elf_section_data (section)->u.tdata;
12792 c = bfd_zalloc (abfd, section->size);
12795 mips_elf_section_data (section)->u.tdata = c;
12798 memcpy (c + offset, location, count);
12801 return _bfd_elf_set_section_contents (abfd, section, location, offset,
12805 /* This is almost identical to bfd_generic_get_... except that some
12806 MIPS relocations need to be handled specially. Sigh. */
12809 _bfd_elf_mips_get_relocated_section_contents
12811 struct bfd_link_info *link_info,
12812 struct bfd_link_order *link_order,
12814 bfd_boolean relocatable,
12817 /* Get enough memory to hold the stuff */
12818 bfd *input_bfd = link_order->u.indirect.section->owner;
12819 asection *input_section = link_order->u.indirect.section;
12822 long reloc_size = bfd_get_reloc_upper_bound (input_bfd, input_section);
12823 arelent **reloc_vector = NULL;
12826 if (reloc_size < 0)
12829 reloc_vector = bfd_malloc (reloc_size);
12830 if (reloc_vector == NULL && reloc_size != 0)
12833 /* read in the section */
12834 sz = input_section->rawsize ? input_section->rawsize : input_section->size;
12835 if (!bfd_get_section_contents (input_bfd, input_section, data, 0, sz))
12838 reloc_count = bfd_canonicalize_reloc (input_bfd,
12842 if (reloc_count < 0)
12845 if (reloc_count > 0)
12850 bfd_vma gp = 0x12345678; /* initialize just to shut gcc up */
12853 struct bfd_hash_entry *h;
12854 struct bfd_link_hash_entry *lh;
12855 /* Skip all this stuff if we aren't mixing formats. */
12856 if (abfd && input_bfd
12857 && abfd->xvec == input_bfd->xvec)
12861 h = bfd_hash_lookup (&link_info->hash->table, "_gp", FALSE, FALSE);
12862 lh = (struct bfd_link_hash_entry *) h;
12869 case bfd_link_hash_undefined:
12870 case bfd_link_hash_undefweak:
12871 case bfd_link_hash_common:
12874 case bfd_link_hash_defined:
12875 case bfd_link_hash_defweak:
12877 gp = lh->u.def.value;
12879 case bfd_link_hash_indirect:
12880 case bfd_link_hash_warning:
12882 /* @@FIXME ignoring warning for now */
12884 case bfd_link_hash_new:
12893 for (parent = reloc_vector; *parent != NULL; parent++)
12895 char *error_message = NULL;
12896 bfd_reloc_status_type r;
12898 /* Specific to MIPS: Deal with relocation types that require
12899 knowing the gp of the output bfd. */
12900 asymbol *sym = *(*parent)->sym_ptr_ptr;
12902 /* If we've managed to find the gp and have a special
12903 function for the relocation then go ahead, else default
12904 to the generic handling. */
12906 && (*parent)->howto->special_function
12907 == _bfd_mips_elf32_gprel16_reloc)
12908 r = _bfd_mips_elf_gprel16_with_gp (input_bfd, sym, *parent,
12909 input_section, relocatable,
12912 r = bfd_perform_relocation (input_bfd, *parent, data,
12914 relocatable ? abfd : NULL,
12919 asection *os = input_section->output_section;
12921 /* A partial link, so keep the relocs */
12922 os->orelocation[os->reloc_count] = *parent;
12926 if (r != bfd_reloc_ok)
12930 case bfd_reloc_undefined:
12931 if (!((*link_info->callbacks->undefined_symbol)
12932 (link_info, bfd_asymbol_name (*(*parent)->sym_ptr_ptr),
12933 input_bfd, input_section, (*parent)->address, TRUE)))
12936 case bfd_reloc_dangerous:
12937 BFD_ASSERT (error_message != NULL);
12938 if (!((*link_info->callbacks->reloc_dangerous)
12939 (link_info, error_message, input_bfd, input_section,
12940 (*parent)->address)))
12943 case bfd_reloc_overflow:
12944 if (!((*link_info->callbacks->reloc_overflow)
12946 bfd_asymbol_name (*(*parent)->sym_ptr_ptr),
12947 (*parent)->howto->name, (*parent)->addend,
12948 input_bfd, input_section, (*parent)->address)))
12951 case bfd_reloc_outofrange:
12960 if (reloc_vector != NULL)
12961 free (reloc_vector);
12965 if (reloc_vector != NULL)
12966 free (reloc_vector);
12971 mips_elf_relax_delete_bytes (bfd *abfd,
12972 asection *sec, bfd_vma addr, int count)
12974 Elf_Internal_Shdr *symtab_hdr;
12975 unsigned int sec_shndx;
12976 bfd_byte *contents;
12977 Elf_Internal_Rela *irel, *irelend;
12978 Elf_Internal_Sym *isym;
12979 Elf_Internal_Sym *isymend;
12980 struct elf_link_hash_entry **sym_hashes;
12981 struct elf_link_hash_entry **end_hashes;
12982 struct elf_link_hash_entry **start_hashes;
12983 unsigned int symcount;
12985 sec_shndx = _bfd_elf_section_from_bfd_section (abfd, sec);
12986 contents = elf_section_data (sec)->this_hdr.contents;
12988 irel = elf_section_data (sec)->relocs;
12989 irelend = irel + sec->reloc_count;
12991 /* Actually delete the bytes. */
12992 memmove (contents + addr, contents + addr + count,
12993 (size_t) (sec->size - addr - count));
12994 sec->size -= count;
12996 /* Adjust all the relocs. */
12997 for (irel = elf_section_data (sec)->relocs; irel < irelend; irel++)
12999 /* Get the new reloc address. */
13000 if (irel->r_offset > addr)
13001 irel->r_offset -= count;
13004 BFD_ASSERT (addr % 2 == 0);
13005 BFD_ASSERT (count % 2 == 0);
13007 /* Adjust the local symbols defined in this section. */
13008 symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
13009 isym = (Elf_Internal_Sym *) symtab_hdr->contents;
13010 for (isymend = isym + symtab_hdr->sh_info; isym < isymend; isym++)
13011 if (isym->st_shndx == sec_shndx && isym->st_value > addr)
13012 isym->st_value -= count;
13014 /* Now adjust the global symbols defined in this section. */
13015 symcount = (symtab_hdr->sh_size / sizeof (Elf32_External_Sym)
13016 - symtab_hdr->sh_info);
13017 sym_hashes = start_hashes = elf_sym_hashes (abfd);
13018 end_hashes = sym_hashes + symcount;
13020 for (; sym_hashes < end_hashes; sym_hashes++)
13022 struct elf_link_hash_entry *sym_hash = *sym_hashes;
13024 if ((sym_hash->root.type == bfd_link_hash_defined
13025 || sym_hash->root.type == bfd_link_hash_defweak)
13026 && sym_hash->root.u.def.section == sec)
13028 bfd_vma value = sym_hash->root.u.def.value;
13030 if (ELF_ST_IS_MICROMIPS (sym_hash->other))
13031 value &= MINUS_TWO;
13033 sym_hash->root.u.def.value -= count;
13041 /* Opcodes needed for microMIPS relaxation as found in
13042 opcodes/micromips-opc.c. */
13044 struct opcode_descriptor {
13045 unsigned long match;
13046 unsigned long mask;
13049 /* The $ra register aka $31. */
13053 /* 32-bit instruction format register fields. */
13055 #define OP32_SREG(opcode) (((opcode) >> 16) & 0x1f)
13056 #define OP32_TREG(opcode) (((opcode) >> 21) & 0x1f)
13058 /* Check if a 5-bit register index can be abbreviated to 3 bits. */
13060 #define OP16_VALID_REG(r) \
13061 ((2 <= (r) && (r) <= 7) || (16 <= (r) && (r) <= 17))
13064 /* 32-bit and 16-bit branches. */
13066 static const struct opcode_descriptor b_insns_32[] = {
13067 { /* "b", "p", */ 0x40400000, 0xffff0000 }, /* bgez 0 */
13068 { /* "b", "p", */ 0x94000000, 0xffff0000 }, /* beq 0, 0 */
13069 { 0, 0 } /* End marker for find_match(). */
13072 static const struct opcode_descriptor bc_insn_32 =
13073 { /* "bc(1|2)(ft)", "N,p", */ 0x42800000, 0xfec30000 };
13075 static const struct opcode_descriptor bz_insn_32 =
13076 { /* "b(g|l)(e|t)z", "s,p", */ 0x40000000, 0xff200000 };
13078 static const struct opcode_descriptor bzal_insn_32 =
13079 { /* "b(ge|lt)zal", "s,p", */ 0x40200000, 0xffa00000 };
13081 static const struct opcode_descriptor beq_insn_32 =
13082 { /* "b(eq|ne)", "s,t,p", */ 0x94000000, 0xdc000000 };
13084 static const struct opcode_descriptor b_insn_16 =
13085 { /* "b", "mD", */ 0xcc00, 0xfc00 };
13087 static const struct opcode_descriptor bz_insn_16 =
13088 { /* "b(eq|ne)z", "md,mE", */ 0x8c00, 0xdc00 };
13091 /* 32-bit and 16-bit branch EQ and NE zero. */
13093 /* NOTE: All opcode tables have BEQ/BNE in the same order: first the
13094 eq and second the ne. This convention is used when replacing a
13095 32-bit BEQ/BNE with the 16-bit version. */
13097 #define BZC32_REG_FIELD(r) (((r) & 0x1f) << 16)
13099 static const struct opcode_descriptor bz_rs_insns_32[] = {
13100 { /* "beqz", "s,p", */ 0x94000000, 0xffe00000 },
13101 { /* "bnez", "s,p", */ 0xb4000000, 0xffe00000 },
13102 { 0, 0 } /* End marker for find_match(). */
13105 static const struct opcode_descriptor bz_rt_insns_32[] = {
13106 { /* "beqz", "t,p", */ 0x94000000, 0xfc01f000 },
13107 { /* "bnez", "t,p", */ 0xb4000000, 0xfc01f000 },
13108 { 0, 0 } /* End marker for find_match(). */
13111 static const struct opcode_descriptor bzc_insns_32[] = {
13112 { /* "beqzc", "s,p", */ 0x40e00000, 0xffe00000 },
13113 { /* "bnezc", "s,p", */ 0x40a00000, 0xffe00000 },
13114 { 0, 0 } /* End marker for find_match(). */
13117 static const struct opcode_descriptor bz_insns_16[] = {
13118 { /* "beqz", "md,mE", */ 0x8c00, 0xfc00 },
13119 { /* "bnez", "md,mE", */ 0xac00, 0xfc00 },
13120 { 0, 0 } /* End marker for find_match(). */
13123 /* Switch between a 5-bit register index and its 3-bit shorthand. */
13125 #define BZ16_REG(opcode) ((((((opcode) >> 7) & 7) + 0x1e) & 0xf) + 2)
13126 #define BZ16_REG_FIELD(r) (((r) & 7) << 7)
13129 /* 32-bit instructions with a delay slot. */
13131 static const struct opcode_descriptor jal_insn_32_bd16 =
13132 { /* "jals", "a", */ 0x74000000, 0xfc000000 };
13134 static const struct opcode_descriptor jal_insn_32_bd32 =
13135 { /* "jal", "a", */ 0xf4000000, 0xfc000000 };
13137 static const struct opcode_descriptor jal_x_insn_32_bd32 =
13138 { /* "jal[x]", "a", */ 0xf0000000, 0xf8000000 };
13140 static const struct opcode_descriptor j_insn_32 =
13141 { /* "j", "a", */ 0xd4000000, 0xfc000000 };
13143 static const struct opcode_descriptor jalr_insn_32 =
13144 { /* "jalr[.hb]", "t,s", */ 0x00000f3c, 0xfc00efff };
13146 /* This table can be compacted, because no opcode replacement is made. */
13148 static const struct opcode_descriptor ds_insns_32_bd16[] = {
13149 { /* "jals", "a", */ 0x74000000, 0xfc000000 },
13151 { /* "jalrs[.hb]", "t,s", */ 0x00004f3c, 0xfc00efff },
13152 { /* "b(ge|lt)zals", "s,p", */ 0x42200000, 0xffa00000 },
13154 { /* "b(g|l)(e|t)z", "s,p", */ 0x40000000, 0xff200000 },
13155 { /* "b(eq|ne)", "s,t,p", */ 0x94000000, 0xdc000000 },
13156 { /* "j", "a", */ 0xd4000000, 0xfc000000 },
13157 { 0, 0 } /* End marker for find_match(). */
13160 /* This table can be compacted, because no opcode replacement is made. */
13162 static const struct opcode_descriptor ds_insns_32_bd32[] = {
13163 { /* "jal[x]", "a", */ 0xf0000000, 0xf8000000 },
13165 { /* "jalr[.hb]", "t,s", */ 0x00000f3c, 0xfc00efff },
13166 { /* "b(ge|lt)zal", "s,p", */ 0x40200000, 0xffa00000 },
13167 { 0, 0 } /* End marker for find_match(). */
13171 /* 16-bit instructions with a delay slot. */
13173 static const struct opcode_descriptor jalr_insn_16_bd16 =
13174 { /* "jalrs", "my,mj", */ 0x45e0, 0xffe0 };
13176 static const struct opcode_descriptor jalr_insn_16_bd32 =
13177 { /* "jalr", "my,mj", */ 0x45c0, 0xffe0 };
13179 static const struct opcode_descriptor jr_insn_16 =
13180 { /* "jr", "mj", */ 0x4580, 0xffe0 };
13182 #define JR16_REG(opcode) ((opcode) & 0x1f)
13184 /* This table can be compacted, because no opcode replacement is made. */
13186 static const struct opcode_descriptor ds_insns_16_bd16[] = {
13187 { /* "jalrs", "my,mj", */ 0x45e0, 0xffe0 },
13189 { /* "b", "mD", */ 0xcc00, 0xfc00 },
13190 { /* "b(eq|ne)z", "md,mE", */ 0x8c00, 0xdc00 },
13191 { /* "jr", "mj", */ 0x4580, 0xffe0 },
13192 { 0, 0 } /* End marker for find_match(). */
13196 /* LUI instruction. */
13198 static const struct opcode_descriptor lui_insn =
13199 { /* "lui", "s,u", */ 0x41a00000, 0xffe00000 };
13202 /* ADDIU instruction. */
13204 static const struct opcode_descriptor addiu_insn =
13205 { /* "addiu", "t,r,j", */ 0x30000000, 0xfc000000 };
13207 static const struct opcode_descriptor addiupc_insn =
13208 { /* "addiu", "mb,$pc,mQ", */ 0x78000000, 0xfc000000 };
13210 #define ADDIUPC_REG_FIELD(r) \
13211 (((2 <= (r) && (r) <= 7) ? (r) : ((r) - 16)) << 23)
13214 /* Relaxable instructions in a JAL delay slot: MOVE. */
13216 /* The 16-bit move has rd in 9:5 and rs in 4:0. The 32-bit moves
13217 (ADDU, OR) have rd in 15:11 and rs in 10:16. */
13218 #define MOVE32_RD(opcode) (((opcode) >> 11) & 0x1f)
13219 #define MOVE32_RS(opcode) (((opcode) >> 16) & 0x1f)
13221 #define MOVE16_RD_FIELD(r) (((r) & 0x1f) << 5)
13222 #define MOVE16_RS_FIELD(r) (((r) & 0x1f) )
13224 static const struct opcode_descriptor move_insns_32[] = {
13225 { /* "move", "d,s", */ 0x00000290, 0xffe007ff }, /* or d,s,$0 */
13226 { /* "move", "d,s", */ 0x00000150, 0xffe007ff }, /* addu d,s,$0 */
13227 { 0, 0 } /* End marker for find_match(). */
13230 static const struct opcode_descriptor move_insn_16 =
13231 { /* "move", "mp,mj", */ 0x0c00, 0xfc00 };
13234 /* NOP instructions. */
13236 static const struct opcode_descriptor nop_insn_32 =
13237 { /* "nop", "", */ 0x00000000, 0xffffffff };
13239 static const struct opcode_descriptor nop_insn_16 =
13240 { /* "nop", "", */ 0x0c00, 0xffff };
13243 /* Instruction match support. */
13245 #define MATCH(opcode, insn) ((opcode & insn.mask) == insn.match)
13248 find_match (unsigned long opcode, const struct opcode_descriptor insn[])
13250 unsigned long indx;
13252 for (indx = 0; insn[indx].mask != 0; indx++)
13253 if (MATCH (opcode, insn[indx]))
13260 /* Branch and delay slot decoding support. */
13262 /* If PTR points to what *might* be a 16-bit branch or jump, then
13263 return the minimum length of its delay slot, otherwise return 0.
13264 Non-zero results are not definitive as we might be checking against
13265 the second half of another instruction. */
13268 check_br16_dslot (bfd *abfd, bfd_byte *ptr)
13270 unsigned long opcode;
13273 opcode = bfd_get_16 (abfd, ptr);
13274 if (MATCH (opcode, jalr_insn_16_bd32) != 0)
13275 /* 16-bit branch/jump with a 32-bit delay slot. */
13277 else if (MATCH (opcode, jalr_insn_16_bd16) != 0
13278 || find_match (opcode, ds_insns_16_bd16) >= 0)
13279 /* 16-bit branch/jump with a 16-bit delay slot. */
13282 /* No delay slot. */
13288 /* If PTR points to what *might* be a 32-bit branch or jump, then
13289 return the minimum length of its delay slot, otherwise return 0.
13290 Non-zero results are not definitive as we might be checking against
13291 the second half of another instruction. */
13294 check_br32_dslot (bfd *abfd, bfd_byte *ptr)
13296 unsigned long opcode;
13299 opcode = bfd_get_micromips_32 (abfd, ptr);
13300 if (find_match (opcode, ds_insns_32_bd32) >= 0)
13301 /* 32-bit branch/jump with a 32-bit delay slot. */
13303 else if (find_match (opcode, ds_insns_32_bd16) >= 0)
13304 /* 32-bit branch/jump with a 16-bit delay slot. */
13307 /* No delay slot. */
13313 /* If PTR points to a 16-bit branch or jump with a 32-bit delay slot
13314 that doesn't fiddle with REG, then return TRUE, otherwise FALSE. */
13317 check_br16 (bfd *abfd, bfd_byte *ptr, unsigned long reg)
13319 unsigned long opcode;
13321 opcode = bfd_get_16 (abfd, ptr);
13322 if (MATCH (opcode, b_insn_16)
13324 || (MATCH (opcode, jr_insn_16) && reg != JR16_REG (opcode))
13326 || (MATCH (opcode, bz_insn_16) && reg != BZ16_REG (opcode))
13327 /* BEQZ16, BNEZ16 */
13328 || (MATCH (opcode, jalr_insn_16_bd32)
13330 && reg != JR16_REG (opcode) && reg != RA))
13336 /* If PTR points to a 32-bit branch or jump that doesn't fiddle with REG,
13337 then return TRUE, otherwise FALSE. */
13340 check_br32 (bfd *abfd, bfd_byte *ptr, unsigned long reg)
13342 unsigned long opcode;
13344 opcode = bfd_get_micromips_32 (abfd, ptr);
13345 if (MATCH (opcode, j_insn_32)
13347 || MATCH (opcode, bc_insn_32)
13348 /* BC1F, BC1T, BC2F, BC2T */
13349 || (MATCH (opcode, jal_x_insn_32_bd32) && reg != RA)
13351 || (MATCH (opcode, bz_insn_32) && reg != OP32_SREG (opcode))
13352 /* BGEZ, BGTZ, BLEZ, BLTZ */
13353 || (MATCH (opcode, bzal_insn_32)
13354 /* BGEZAL, BLTZAL */
13355 && reg != OP32_SREG (opcode) && reg != RA)
13356 || ((MATCH (opcode, jalr_insn_32) || MATCH (opcode, beq_insn_32))
13357 /* JALR, JALR.HB, BEQ, BNE */
13358 && reg != OP32_SREG (opcode) && reg != OP32_TREG (opcode)))
13364 /* If the instruction encoding at PTR and relocations [INTERNAL_RELOCS,
13365 IRELEND) at OFFSET indicate that there must be a compact branch there,
13366 then return TRUE, otherwise FALSE. */
13369 check_relocated_bzc (bfd *abfd, const bfd_byte *ptr, bfd_vma offset,
13370 const Elf_Internal_Rela *internal_relocs,
13371 const Elf_Internal_Rela *irelend)
13373 const Elf_Internal_Rela *irel;
13374 unsigned long opcode;
13376 opcode = bfd_get_micromips_32 (abfd, ptr);
13377 if (find_match (opcode, bzc_insns_32) < 0)
13380 for (irel = internal_relocs; irel < irelend; irel++)
13381 if (irel->r_offset == offset
13382 && ELF32_R_TYPE (irel->r_info) == R_MICROMIPS_PC16_S1)
13388 /* Bitsize checking. */
13389 #define IS_BITSIZE(val, N) \
13390 (((((val) & ((1ULL << (N)) - 1)) ^ (1ULL << ((N) - 1))) \
13391 - (1ULL << ((N) - 1))) == (val))
13395 _bfd_mips_elf_relax_section (bfd *abfd, asection *sec,
13396 struct bfd_link_info *link_info,
13397 bfd_boolean *again)
13399 bfd_boolean insn32 = mips_elf_hash_table (link_info)->insn32;
13400 Elf_Internal_Shdr *symtab_hdr;
13401 Elf_Internal_Rela *internal_relocs;
13402 Elf_Internal_Rela *irel, *irelend;
13403 bfd_byte *contents = NULL;
13404 Elf_Internal_Sym *isymbuf = NULL;
13406 /* Assume nothing changes. */
13409 /* We don't have to do anything for a relocatable link, if
13410 this section does not have relocs, or if this is not a
13413 if (bfd_link_relocatable (link_info)
13414 || (sec->flags & SEC_RELOC) == 0
13415 || sec->reloc_count == 0
13416 || (sec->flags & SEC_CODE) == 0)
13419 symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
13421 /* Get a copy of the native relocations. */
13422 internal_relocs = (_bfd_elf_link_read_relocs
13423 (abfd, sec, NULL, (Elf_Internal_Rela *) NULL,
13424 link_info->keep_memory));
13425 if (internal_relocs == NULL)
13428 /* Walk through them looking for relaxing opportunities. */
13429 irelend = internal_relocs + sec->reloc_count;
13430 for (irel = internal_relocs; irel < irelend; irel++)
13432 unsigned long r_symndx = ELF32_R_SYM (irel->r_info);
13433 unsigned int r_type = ELF32_R_TYPE (irel->r_info);
13434 bfd_boolean target_is_micromips_code_p;
13435 unsigned long opcode;
13441 /* The number of bytes to delete for relaxation and from where
13442 to delete these bytes starting at irel->r_offset. */
13446 /* If this isn't something that can be relaxed, then ignore
13448 if (r_type != R_MICROMIPS_HI16
13449 && r_type != R_MICROMIPS_PC16_S1
13450 && r_type != R_MICROMIPS_26_S1)
13453 /* Get the section contents if we haven't done so already. */
13454 if (contents == NULL)
13456 /* Get cached copy if it exists. */
13457 if (elf_section_data (sec)->this_hdr.contents != NULL)
13458 contents = elf_section_data (sec)->this_hdr.contents;
13459 /* Go get them off disk. */
13460 else if (!bfd_malloc_and_get_section (abfd, sec, &contents))
13463 ptr = contents + irel->r_offset;
13465 /* Read this BFD's local symbols if we haven't done so already. */
13466 if (isymbuf == NULL && symtab_hdr->sh_info != 0)
13468 isymbuf = (Elf_Internal_Sym *) symtab_hdr->contents;
13469 if (isymbuf == NULL)
13470 isymbuf = bfd_elf_get_elf_syms (abfd, symtab_hdr,
13471 symtab_hdr->sh_info, 0,
13473 if (isymbuf == NULL)
13477 /* Get the value of the symbol referred to by the reloc. */
13478 if (r_symndx < symtab_hdr->sh_info)
13480 /* A local symbol. */
13481 Elf_Internal_Sym *isym;
13484 isym = isymbuf + r_symndx;
13485 if (isym->st_shndx == SHN_UNDEF)
13486 sym_sec = bfd_und_section_ptr;
13487 else if (isym->st_shndx == SHN_ABS)
13488 sym_sec = bfd_abs_section_ptr;
13489 else if (isym->st_shndx == SHN_COMMON)
13490 sym_sec = bfd_com_section_ptr;
13492 sym_sec = bfd_section_from_elf_index (abfd, isym->st_shndx);
13493 symval = (isym->st_value
13494 + sym_sec->output_section->vma
13495 + sym_sec->output_offset);
13496 target_is_micromips_code_p = ELF_ST_IS_MICROMIPS (isym->st_other);
13500 unsigned long indx;
13501 struct elf_link_hash_entry *h;
13503 /* An external symbol. */
13504 indx = r_symndx - symtab_hdr->sh_info;
13505 h = elf_sym_hashes (abfd)[indx];
13506 BFD_ASSERT (h != NULL);
13508 if (h->root.type != bfd_link_hash_defined
13509 && h->root.type != bfd_link_hash_defweak)
13510 /* This appears to be a reference to an undefined
13511 symbol. Just ignore it -- it will be caught by the
13512 regular reloc processing. */
13515 symval = (h->root.u.def.value
13516 + h->root.u.def.section->output_section->vma
13517 + h->root.u.def.section->output_offset);
13518 target_is_micromips_code_p = (!h->needs_plt
13519 && ELF_ST_IS_MICROMIPS (h->other));
13523 /* For simplicity of coding, we are going to modify the
13524 section contents, the section relocs, and the BFD symbol
13525 table. We must tell the rest of the code not to free up this
13526 information. It would be possible to instead create a table
13527 of changes which have to be made, as is done in coff-mips.c;
13528 that would be more work, but would require less memory when
13529 the linker is run. */
13531 /* Only 32-bit instructions relaxed. */
13532 if (irel->r_offset + 4 > sec->size)
13535 opcode = bfd_get_micromips_32 (abfd, ptr);
13537 /* This is the pc-relative distance from the instruction the
13538 relocation is applied to, to the symbol referred. */
13540 - (sec->output_section->vma + sec->output_offset)
13543 /* R_MICROMIPS_HI16 / LUI relaxation to nil, performing relaxation
13544 of corresponding R_MICROMIPS_LO16 to R_MICROMIPS_HI0_LO16 or
13545 R_MICROMIPS_PC23_S2. The R_MICROMIPS_PC23_S2 condition is
13547 (symval % 4 == 0 && IS_BITSIZE (pcrval, 25))
13549 where pcrval has first to be adjusted to apply against the LO16
13550 location (we make the adjustment later on, when we have figured
13551 out the offset). */
13552 if (r_type == R_MICROMIPS_HI16 && MATCH (opcode, lui_insn))
13554 bfd_boolean bzc = FALSE;
13555 unsigned long nextopc;
13559 /* Give up if the previous reloc was a HI16 against this symbol
13561 if (irel > internal_relocs
13562 && ELF32_R_TYPE (irel[-1].r_info) == R_MICROMIPS_HI16
13563 && ELF32_R_SYM (irel[-1].r_info) == r_symndx)
13566 /* Or if the next reloc is not a LO16 against this symbol. */
13567 if (irel + 1 >= irelend
13568 || ELF32_R_TYPE (irel[1].r_info) != R_MICROMIPS_LO16
13569 || ELF32_R_SYM (irel[1].r_info) != r_symndx)
13572 /* Or if the second next reloc is a LO16 against this symbol too. */
13573 if (irel + 2 >= irelend
13574 && ELF32_R_TYPE (irel[2].r_info) == R_MICROMIPS_LO16
13575 && ELF32_R_SYM (irel[2].r_info) == r_symndx)
13578 /* See if the LUI instruction *might* be in a branch delay slot.
13579 We check whether what looks like a 16-bit branch or jump is
13580 actually an immediate argument to a compact branch, and let
13581 it through if so. */
13582 if (irel->r_offset >= 2
13583 && check_br16_dslot (abfd, ptr - 2)
13584 && !(irel->r_offset >= 4
13585 && (bzc = check_relocated_bzc (abfd,
13586 ptr - 4, irel->r_offset - 4,
13587 internal_relocs, irelend))))
13589 if (irel->r_offset >= 4
13591 && check_br32_dslot (abfd, ptr - 4))
13594 reg = OP32_SREG (opcode);
13596 /* We only relax adjacent instructions or ones separated with
13597 a branch or jump that has a delay slot. The branch or jump
13598 must not fiddle with the register used to hold the address.
13599 Subtract 4 for the LUI itself. */
13600 offset = irel[1].r_offset - irel[0].r_offset;
13601 switch (offset - 4)
13606 if (check_br16 (abfd, ptr + 4, reg))
13610 if (check_br32 (abfd, ptr + 4, reg))
13617 nextopc = bfd_get_micromips_32 (abfd, contents + irel[1].r_offset);
13619 /* Give up unless the same register is used with both
13621 if (OP32_SREG (nextopc) != reg)
13624 /* Now adjust pcrval, subtracting the offset to the LO16 reloc
13625 and rounding up to take masking of the two LSBs into account. */
13626 pcrval = ((pcrval - offset + 3) | 3) ^ 3;
13628 /* R_MICROMIPS_LO16 relaxation to R_MICROMIPS_HI0_LO16. */
13629 if (IS_BITSIZE (symval, 16))
13631 /* Fix the relocation's type. */
13632 irel[1].r_info = ELF32_R_INFO (r_symndx, R_MICROMIPS_HI0_LO16);
13634 /* Instructions using R_MICROMIPS_LO16 have the base or
13635 source register in bits 20:16. This register becomes $0
13636 (zero) as the result of the R_MICROMIPS_HI16 being 0. */
13637 nextopc &= ~0x001f0000;
13638 bfd_put_16 (abfd, (nextopc >> 16) & 0xffff,
13639 contents + irel[1].r_offset);
13642 /* R_MICROMIPS_LO16 / ADDIU relaxation to R_MICROMIPS_PC23_S2.
13643 We add 4 to take LUI deletion into account while checking
13644 the PC-relative distance. */
13645 else if (symval % 4 == 0
13646 && IS_BITSIZE (pcrval + 4, 25)
13647 && MATCH (nextopc, addiu_insn)
13648 && OP32_TREG (nextopc) == OP32_SREG (nextopc)
13649 && OP16_VALID_REG (OP32_TREG (nextopc)))
13651 /* Fix the relocation's type. */
13652 irel[1].r_info = ELF32_R_INFO (r_symndx, R_MICROMIPS_PC23_S2);
13654 /* Replace ADDIU with the ADDIUPC version. */
13655 nextopc = (addiupc_insn.match
13656 | ADDIUPC_REG_FIELD (OP32_TREG (nextopc)));
13658 bfd_put_micromips_32 (abfd, nextopc,
13659 contents + irel[1].r_offset);
13662 /* Can't do anything, give up, sigh... */
13666 /* Fix the relocation's type. */
13667 irel->r_info = ELF32_R_INFO (r_symndx, R_MIPS_NONE);
13669 /* Delete the LUI instruction: 4 bytes at irel->r_offset. */
13674 /* Compact branch relaxation -- due to the multitude of macros
13675 employed by the compiler/assembler, compact branches are not
13676 always generated. Obviously, this can/will be fixed elsewhere,
13677 but there is no drawback in double checking it here. */
13678 else if (r_type == R_MICROMIPS_PC16_S1
13679 && irel->r_offset + 5 < sec->size
13680 && ((fndopc = find_match (opcode, bz_rs_insns_32)) >= 0
13681 || (fndopc = find_match (opcode, bz_rt_insns_32)) >= 0)
13683 && (delcnt = MATCH (bfd_get_16 (abfd, ptr + 4),
13684 nop_insn_16) ? 2 : 0))
13685 || (irel->r_offset + 7 < sec->size
13686 && (delcnt = MATCH (bfd_get_micromips_32 (abfd,
13688 nop_insn_32) ? 4 : 0))))
13692 reg = OP32_SREG (opcode) ? OP32_SREG (opcode) : OP32_TREG (opcode);
13694 /* Replace BEQZ/BNEZ with the compact version. */
13695 opcode = (bzc_insns_32[fndopc].match
13696 | BZC32_REG_FIELD (reg)
13697 | (opcode & 0xffff)); /* Addend value. */
13699 bfd_put_micromips_32 (abfd, opcode, ptr);
13701 /* Delete the delay slot NOP: two or four bytes from
13702 irel->offset + 4; delcnt has already been set above. */
13706 /* R_MICROMIPS_PC16_S1 relaxation to R_MICROMIPS_PC10_S1. We need
13707 to check the distance from the next instruction, so subtract 2. */
13709 && r_type == R_MICROMIPS_PC16_S1
13710 && IS_BITSIZE (pcrval - 2, 11)
13711 && find_match (opcode, b_insns_32) >= 0)
13713 /* Fix the relocation's type. */
13714 irel->r_info = ELF32_R_INFO (r_symndx, R_MICROMIPS_PC10_S1);
13716 /* Replace the 32-bit opcode with a 16-bit opcode. */
13719 | (opcode & 0x3ff)), /* Addend value. */
13722 /* Delete 2 bytes from irel->r_offset + 2. */
13727 /* R_MICROMIPS_PC16_S1 relaxation to R_MICROMIPS_PC7_S1. We need
13728 to check the distance from the next instruction, so subtract 2. */
13730 && r_type == R_MICROMIPS_PC16_S1
13731 && IS_BITSIZE (pcrval - 2, 8)
13732 && (((fndopc = find_match (opcode, bz_rs_insns_32)) >= 0
13733 && OP16_VALID_REG (OP32_SREG (opcode)))
13734 || ((fndopc = find_match (opcode, bz_rt_insns_32)) >= 0
13735 && OP16_VALID_REG (OP32_TREG (opcode)))))
13739 reg = OP32_SREG (opcode) ? OP32_SREG (opcode) : OP32_TREG (opcode);
13741 /* Fix the relocation's type. */
13742 irel->r_info = ELF32_R_INFO (r_symndx, R_MICROMIPS_PC7_S1);
13744 /* Replace the 32-bit opcode with a 16-bit opcode. */
13746 (bz_insns_16[fndopc].match
13747 | BZ16_REG_FIELD (reg)
13748 | (opcode & 0x7f)), /* Addend value. */
13751 /* Delete 2 bytes from irel->r_offset + 2. */
13756 /* R_MICROMIPS_26_S1 -- JAL to JALS relaxation for microMIPS targets. */
13758 && r_type == R_MICROMIPS_26_S1
13759 && target_is_micromips_code_p
13760 && irel->r_offset + 7 < sec->size
13761 && MATCH (opcode, jal_insn_32_bd32))
13763 unsigned long n32opc;
13764 bfd_boolean relaxed = FALSE;
13766 n32opc = bfd_get_micromips_32 (abfd, ptr + 4);
13768 if (MATCH (n32opc, nop_insn_32))
13770 /* Replace delay slot 32-bit NOP with a 16-bit NOP. */
13771 bfd_put_16 (abfd, nop_insn_16.match, ptr + 4);
13775 else if (find_match (n32opc, move_insns_32) >= 0)
13777 /* Replace delay slot 32-bit MOVE with 16-bit MOVE. */
13779 (move_insn_16.match
13780 | MOVE16_RD_FIELD (MOVE32_RD (n32opc))
13781 | MOVE16_RS_FIELD (MOVE32_RS (n32opc))),
13786 /* Other 32-bit instructions relaxable to 16-bit
13787 instructions will be handled here later. */
13791 /* JAL with 32-bit delay slot that is changed to a JALS
13792 with 16-bit delay slot. */
13793 bfd_put_micromips_32 (abfd, jal_insn_32_bd16.match, ptr);
13795 /* Delete 2 bytes from irel->r_offset + 6. */
13803 /* Note that we've changed the relocs, section contents, etc. */
13804 elf_section_data (sec)->relocs = internal_relocs;
13805 elf_section_data (sec)->this_hdr.contents = contents;
13806 symtab_hdr->contents = (unsigned char *) isymbuf;
13808 /* Delete bytes depending on the delcnt and deloff. */
13809 if (!mips_elf_relax_delete_bytes (abfd, sec,
13810 irel->r_offset + deloff, delcnt))
13813 /* That will change things, so we should relax again.
13814 Note that this is not required, and it may be slow. */
13819 if (isymbuf != NULL
13820 && symtab_hdr->contents != (unsigned char *) isymbuf)
13822 if (! link_info->keep_memory)
13826 /* Cache the symbols for elf_link_input_bfd. */
13827 symtab_hdr->contents = (unsigned char *) isymbuf;
13831 if (contents != NULL
13832 && elf_section_data (sec)->this_hdr.contents != contents)
13834 if (! link_info->keep_memory)
13838 /* Cache the section contents for elf_link_input_bfd. */
13839 elf_section_data (sec)->this_hdr.contents = contents;
13843 if (internal_relocs != NULL
13844 && elf_section_data (sec)->relocs != internal_relocs)
13845 free (internal_relocs);
13850 if (isymbuf != NULL
13851 && symtab_hdr->contents != (unsigned char *) isymbuf)
13853 if (contents != NULL
13854 && elf_section_data (sec)->this_hdr.contents != contents)
13856 if (internal_relocs != NULL
13857 && elf_section_data (sec)->relocs != internal_relocs)
13858 free (internal_relocs);
13863 /* Create a MIPS ELF linker hash table. */
13865 struct bfd_link_hash_table *
13866 _bfd_mips_elf_link_hash_table_create (bfd *abfd)
13868 struct mips_elf_link_hash_table *ret;
13869 bfd_size_type amt = sizeof (struct mips_elf_link_hash_table);
13871 ret = bfd_zmalloc (amt);
13875 if (!_bfd_elf_link_hash_table_init (&ret->root, abfd,
13876 mips_elf_link_hash_newfunc,
13877 sizeof (struct mips_elf_link_hash_entry),
13883 ret->root.init_plt_refcount.plist = NULL;
13884 ret->root.init_plt_offset.plist = NULL;
13886 return &ret->root.root;
13889 /* Likewise, but indicate that the target is VxWorks. */
13891 struct bfd_link_hash_table *
13892 _bfd_mips_vxworks_link_hash_table_create (bfd *abfd)
13894 struct bfd_link_hash_table *ret;
13896 ret = _bfd_mips_elf_link_hash_table_create (abfd);
13899 struct mips_elf_link_hash_table *htab;
13901 htab = (struct mips_elf_link_hash_table *) ret;
13902 htab->use_plts_and_copy_relocs = TRUE;
13903 htab->is_vxworks = TRUE;
13908 /* A function that the linker calls if we are allowed to use PLTs
13909 and copy relocs. */
13912 _bfd_mips_elf_use_plts_and_copy_relocs (struct bfd_link_info *info)
13914 mips_elf_hash_table (info)->use_plts_and_copy_relocs = TRUE;
13917 /* A function that the linker calls to select between all or only
13918 32-bit microMIPS instructions. */
13921 _bfd_mips_elf_insn32 (struct bfd_link_info *info, bfd_boolean on)
13923 mips_elf_hash_table (info)->insn32 = on;
13926 /* Structure for saying that BFD machine EXTENSION extends BASE. */
13928 struct mips_mach_extension
13930 unsigned long extension, base;
13934 /* An array describing how BFD machines relate to one another. The entries
13935 are ordered topologically with MIPS I extensions listed last. */
13937 static const struct mips_mach_extension mips_mach_extensions[] =
13939 /* MIPS64r2 extensions. */
13940 { bfd_mach_mips_octeon3, bfd_mach_mips_octeon2 },
13941 { bfd_mach_mips_octeon2, bfd_mach_mips_octeonp },
13942 { bfd_mach_mips_octeonp, bfd_mach_mips_octeon },
13943 { bfd_mach_mips_octeon, bfd_mach_mipsisa64r2 },
13944 { bfd_mach_mips_loongson_3a, bfd_mach_mipsisa64r2 },
13946 /* MIPS64 extensions. */
13947 { bfd_mach_mipsisa64r2, bfd_mach_mipsisa64 },
13948 { bfd_mach_mips_sb1, bfd_mach_mipsisa64 },
13949 { bfd_mach_mips_xlr, bfd_mach_mipsisa64 },
13951 /* MIPS V extensions. */
13952 { bfd_mach_mipsisa64, bfd_mach_mips5 },
13954 /* R10000 extensions. */
13955 { bfd_mach_mips12000, bfd_mach_mips10000 },
13956 { bfd_mach_mips14000, bfd_mach_mips10000 },
13957 { bfd_mach_mips16000, bfd_mach_mips10000 },
13959 /* R5000 extensions. Note: the vr5500 ISA is an extension of the core
13960 vr5400 ISA, but doesn't include the multimedia stuff. It seems
13961 better to allow vr5400 and vr5500 code to be merged anyway, since
13962 many libraries will just use the core ISA. Perhaps we could add
13963 some sort of ASE flag if this ever proves a problem. */
13964 { bfd_mach_mips5500, bfd_mach_mips5400 },
13965 { bfd_mach_mips5400, bfd_mach_mips5000 },
13967 /* MIPS IV extensions. */
13968 { bfd_mach_mips5, bfd_mach_mips8000 },
13969 { bfd_mach_mips10000, bfd_mach_mips8000 },
13970 { bfd_mach_mips5000, bfd_mach_mips8000 },
13971 { bfd_mach_mips7000, bfd_mach_mips8000 },
13972 { bfd_mach_mips9000, bfd_mach_mips8000 },
13974 /* VR4100 extensions. */
13975 { bfd_mach_mips4120, bfd_mach_mips4100 },
13976 { bfd_mach_mips4111, bfd_mach_mips4100 },
13978 /* MIPS III extensions. */
13979 { bfd_mach_mips_loongson_2e, bfd_mach_mips4000 },
13980 { bfd_mach_mips_loongson_2f, bfd_mach_mips4000 },
13981 { bfd_mach_mips8000, bfd_mach_mips4000 },
13982 { bfd_mach_mips4650, bfd_mach_mips4000 },
13983 { bfd_mach_mips4600, bfd_mach_mips4000 },
13984 { bfd_mach_mips4400, bfd_mach_mips4000 },
13985 { bfd_mach_mips4300, bfd_mach_mips4000 },
13986 { bfd_mach_mips4100, bfd_mach_mips4000 },
13987 { bfd_mach_mips4010, bfd_mach_mips4000 },
13988 { bfd_mach_mips5900, bfd_mach_mips4000 },
13990 /* MIPS32 extensions. */
13991 { bfd_mach_mipsisa32r2, bfd_mach_mipsisa32 },
13993 /* MIPS II extensions. */
13994 { bfd_mach_mips4000, bfd_mach_mips6000 },
13995 { bfd_mach_mipsisa32, bfd_mach_mips6000 },
13997 /* MIPS I extensions. */
13998 { bfd_mach_mips6000, bfd_mach_mips3000 },
13999 { bfd_mach_mips3900, bfd_mach_mips3000 }
14002 /* Return true if bfd machine EXTENSION is an extension of machine BASE. */
14005 mips_mach_extends_p (unsigned long base, unsigned long extension)
14009 if (extension == base)
14012 if (base == bfd_mach_mipsisa32
14013 && mips_mach_extends_p (bfd_mach_mipsisa64, extension))
14016 if (base == bfd_mach_mipsisa32r2
14017 && mips_mach_extends_p (bfd_mach_mipsisa64r2, extension))
14020 for (i = 0; i < ARRAY_SIZE (mips_mach_extensions); i++)
14021 if (extension == mips_mach_extensions[i].extension)
14023 extension = mips_mach_extensions[i].base;
14024 if (extension == base)
14031 /* Return the BFD mach for each .MIPS.abiflags ISA Extension. */
14033 static unsigned long
14034 bfd_mips_isa_ext_mach (unsigned int isa_ext)
14038 case AFL_EXT_3900: return bfd_mach_mips3900;
14039 case AFL_EXT_4010: return bfd_mach_mips4010;
14040 case AFL_EXT_4100: return bfd_mach_mips4100;
14041 case AFL_EXT_4111: return bfd_mach_mips4111;
14042 case AFL_EXT_4120: return bfd_mach_mips4120;
14043 case AFL_EXT_4650: return bfd_mach_mips4650;
14044 case AFL_EXT_5400: return bfd_mach_mips5400;
14045 case AFL_EXT_5500: return bfd_mach_mips5500;
14046 case AFL_EXT_5900: return bfd_mach_mips5900;
14047 case AFL_EXT_10000: return bfd_mach_mips10000;
14048 case AFL_EXT_LOONGSON_2E: return bfd_mach_mips_loongson_2e;
14049 case AFL_EXT_LOONGSON_2F: return bfd_mach_mips_loongson_2f;
14050 case AFL_EXT_LOONGSON_3A: return bfd_mach_mips_loongson_3a;
14051 case AFL_EXT_SB1: return bfd_mach_mips_sb1;
14052 case AFL_EXT_OCTEON: return bfd_mach_mips_octeon;
14053 case AFL_EXT_OCTEONP: return bfd_mach_mips_octeonp;
14054 case AFL_EXT_OCTEON2: return bfd_mach_mips_octeon2;
14055 case AFL_EXT_XLR: return bfd_mach_mips_xlr;
14056 default: return bfd_mach_mips3000;
14060 /* Return the .MIPS.abiflags value representing each ISA Extension. */
14063 bfd_mips_isa_ext (bfd *abfd)
14065 switch (bfd_get_mach (abfd))
14067 case bfd_mach_mips3900: return AFL_EXT_3900;
14068 case bfd_mach_mips4010: return AFL_EXT_4010;
14069 case bfd_mach_mips4100: return AFL_EXT_4100;
14070 case bfd_mach_mips4111: return AFL_EXT_4111;
14071 case bfd_mach_mips4120: return AFL_EXT_4120;
14072 case bfd_mach_mips4650: return AFL_EXT_4650;
14073 case bfd_mach_mips5400: return AFL_EXT_5400;
14074 case bfd_mach_mips5500: return AFL_EXT_5500;
14075 case bfd_mach_mips5900: return AFL_EXT_5900;
14076 case bfd_mach_mips10000: return AFL_EXT_10000;
14077 case bfd_mach_mips_loongson_2e: return AFL_EXT_LOONGSON_2E;
14078 case bfd_mach_mips_loongson_2f: return AFL_EXT_LOONGSON_2F;
14079 case bfd_mach_mips_loongson_3a: return AFL_EXT_LOONGSON_3A;
14080 case bfd_mach_mips_sb1: return AFL_EXT_SB1;
14081 case bfd_mach_mips_octeon: return AFL_EXT_OCTEON;
14082 case bfd_mach_mips_octeonp: return AFL_EXT_OCTEONP;
14083 case bfd_mach_mips_octeon3: return AFL_EXT_OCTEON3;
14084 case bfd_mach_mips_octeon2: return AFL_EXT_OCTEON2;
14085 case bfd_mach_mips_xlr: return AFL_EXT_XLR;
14090 /* Encode ISA level and revision as a single value. */
14091 #define LEVEL_REV(LEV,REV) ((LEV) << 3 | (REV))
14093 /* Decode a single value into level and revision. */
14094 #define ISA_LEVEL(LEVREV) ((LEVREV) >> 3)
14095 #define ISA_REV(LEVREV) ((LEVREV) & 0x7)
14097 /* Update the isa_level, isa_rev, isa_ext fields of abiflags. */
14100 update_mips_abiflags_isa (bfd *abfd, Elf_Internal_ABIFlags_v0 *abiflags)
14103 switch (elf_elfheader (abfd)->e_flags & EF_MIPS_ARCH)
14105 case E_MIPS_ARCH_1: new_isa = LEVEL_REV (1, 0); break;
14106 case E_MIPS_ARCH_2: new_isa = LEVEL_REV (2, 0); break;
14107 case E_MIPS_ARCH_3: new_isa = LEVEL_REV (3, 0); break;
14108 case E_MIPS_ARCH_4: new_isa = LEVEL_REV (4, 0); break;
14109 case E_MIPS_ARCH_5: new_isa = LEVEL_REV (5, 0); break;
14110 case E_MIPS_ARCH_32: new_isa = LEVEL_REV (32, 1); break;
14111 case E_MIPS_ARCH_32R2: new_isa = LEVEL_REV (32, 2); break;
14112 case E_MIPS_ARCH_32R6: new_isa = LEVEL_REV (32, 6); break;
14113 case E_MIPS_ARCH_64: new_isa = LEVEL_REV (64, 1); break;
14114 case E_MIPS_ARCH_64R2: new_isa = LEVEL_REV (64, 2); break;
14115 case E_MIPS_ARCH_64R6: new_isa = LEVEL_REV (64, 6); break;
14117 (*_bfd_error_handler)
14118 (_("%B: Unknown architecture %s"),
14119 abfd, bfd_printable_name (abfd));
14122 if (new_isa > LEVEL_REV (abiflags->isa_level, abiflags->isa_rev))
14124 abiflags->isa_level = ISA_LEVEL (new_isa);
14125 abiflags->isa_rev = ISA_REV (new_isa);
14128 /* Update the isa_ext if ABFD describes a further extension. */
14129 if (mips_mach_extends_p (bfd_mips_isa_ext_mach (abiflags->isa_ext),
14130 bfd_get_mach (abfd)))
14131 abiflags->isa_ext = bfd_mips_isa_ext (abfd);
14134 /* Return true if the given ELF header flags describe a 32-bit binary. */
14137 mips_32bit_flags_p (flagword flags)
14139 return ((flags & EF_MIPS_32BITMODE) != 0
14140 || (flags & EF_MIPS_ABI) == E_MIPS_ABI_O32
14141 || (flags & EF_MIPS_ABI) == E_MIPS_ABI_EABI32
14142 || (flags & EF_MIPS_ARCH) == E_MIPS_ARCH_1
14143 || (flags & EF_MIPS_ARCH) == E_MIPS_ARCH_2
14144 || (flags & EF_MIPS_ARCH) == E_MIPS_ARCH_32
14145 || (flags & EF_MIPS_ARCH) == E_MIPS_ARCH_32R2
14146 || (flags & EF_MIPS_ARCH) == E_MIPS_ARCH_32R6);
14149 /* Infer the content of the ABI flags based on the elf header. */
14152 infer_mips_abiflags (bfd *abfd, Elf_Internal_ABIFlags_v0* abiflags)
14154 obj_attribute *in_attr;
14156 memset (abiflags, 0, sizeof (Elf_Internal_ABIFlags_v0));
14157 update_mips_abiflags_isa (abfd, abiflags);
14159 if (mips_32bit_flags_p (elf_elfheader (abfd)->e_flags))
14160 abiflags->gpr_size = AFL_REG_32;
14162 abiflags->gpr_size = AFL_REG_64;
14164 abiflags->cpr1_size = AFL_REG_NONE;
14166 in_attr = elf_known_obj_attributes (abfd)[OBJ_ATTR_GNU];
14167 abiflags->fp_abi = in_attr[Tag_GNU_MIPS_ABI_FP].i;
14169 if (abiflags->fp_abi == Val_GNU_MIPS_ABI_FP_SINGLE
14170 || abiflags->fp_abi == Val_GNU_MIPS_ABI_FP_XX
14171 || (abiflags->fp_abi == Val_GNU_MIPS_ABI_FP_DOUBLE
14172 && abiflags->gpr_size == AFL_REG_32))
14173 abiflags->cpr1_size = AFL_REG_32;
14174 else if (abiflags->fp_abi == Val_GNU_MIPS_ABI_FP_DOUBLE
14175 || abiflags->fp_abi == Val_GNU_MIPS_ABI_FP_64
14176 || abiflags->fp_abi == Val_GNU_MIPS_ABI_FP_64A)
14177 abiflags->cpr1_size = AFL_REG_64;
14179 abiflags->cpr2_size = AFL_REG_NONE;
14181 if (elf_elfheader (abfd)->e_flags & EF_MIPS_ARCH_ASE_MDMX)
14182 abiflags->ases |= AFL_ASE_MDMX;
14183 if (elf_elfheader (abfd)->e_flags & EF_MIPS_ARCH_ASE_M16)
14184 abiflags->ases |= AFL_ASE_MIPS16;
14185 if (elf_elfheader (abfd)->e_flags & EF_MIPS_ARCH_ASE_MICROMIPS)
14186 abiflags->ases |= AFL_ASE_MICROMIPS;
14188 if (abiflags->fp_abi != Val_GNU_MIPS_ABI_FP_ANY
14189 && abiflags->fp_abi != Val_GNU_MIPS_ABI_FP_SOFT
14190 && abiflags->fp_abi != Val_GNU_MIPS_ABI_FP_64A
14191 && abiflags->isa_level >= 32
14192 && abiflags->isa_ext != AFL_EXT_LOONGSON_3A)
14193 abiflags->flags1 |= AFL_FLAGS1_ODDSPREG;
14196 /* We need to use a special link routine to handle the .reginfo and
14197 the .mdebug sections. We need to merge all instances of these
14198 sections together, not write them all out sequentially. */
14201 _bfd_mips_elf_final_link (bfd *abfd, struct bfd_link_info *info)
14204 struct bfd_link_order *p;
14205 asection *reginfo_sec, *mdebug_sec, *gptab_data_sec, *gptab_bss_sec;
14206 asection *rtproc_sec, *abiflags_sec;
14207 Elf32_RegInfo reginfo;
14208 struct ecoff_debug_info debug;
14209 struct mips_htab_traverse_info hti;
14210 const struct elf_backend_data *bed = get_elf_backend_data (abfd);
14211 const struct ecoff_debug_swap *swap = bed->elf_backend_ecoff_debug_swap;
14212 HDRR *symhdr = &debug.symbolic_header;
14213 void *mdebug_handle = NULL;
14218 struct mips_elf_link_hash_table *htab;
14220 static const char * const secname[] =
14222 ".text", ".init", ".fini", ".data",
14223 ".rodata", ".sdata", ".sbss", ".bss"
14225 static const int sc[] =
14227 scText, scInit, scFini, scData,
14228 scRData, scSData, scSBss, scBss
14231 /* Sort the dynamic symbols so that those with GOT entries come after
14233 htab = mips_elf_hash_table (info);
14234 BFD_ASSERT (htab != NULL);
14236 if (!mips_elf_sort_hash_table (abfd, info))
14239 /* Create any scheduled LA25 stubs. */
14241 hti.output_bfd = abfd;
14243 htab_traverse (htab->la25_stubs, mips_elf_create_la25_stub, &hti);
14247 /* Get a value for the GP register. */
14248 if (elf_gp (abfd) == 0)
14250 struct bfd_link_hash_entry *h;
14252 h = bfd_link_hash_lookup (info->hash, "_gp", FALSE, FALSE, TRUE);
14253 if (h != NULL && h->type == bfd_link_hash_defined)
14254 elf_gp (abfd) = (h->u.def.value
14255 + h->u.def.section->output_section->vma
14256 + h->u.def.section->output_offset);
14257 else if (htab->is_vxworks
14258 && (h = bfd_link_hash_lookup (info->hash,
14259 "_GLOBAL_OFFSET_TABLE_",
14260 FALSE, FALSE, TRUE))
14261 && h->type == bfd_link_hash_defined)
14262 elf_gp (abfd) = (h->u.def.section->output_section->vma
14263 + h->u.def.section->output_offset
14265 else if (bfd_link_relocatable (info))
14267 bfd_vma lo = MINUS_ONE;
14269 /* Find the GP-relative section with the lowest offset. */
14270 for (o = abfd->sections; o != NULL; o = o->next)
14272 && (elf_section_data (o)->this_hdr.sh_flags & SHF_MIPS_GPREL))
14275 /* And calculate GP relative to that. */
14276 elf_gp (abfd) = lo + ELF_MIPS_GP_OFFSET (info);
14280 /* If the relocate_section function needs to do a reloc
14281 involving the GP value, it should make a reloc_dangerous
14282 callback to warn that GP is not defined. */
14286 /* Go through the sections and collect the .reginfo and .mdebug
14288 abiflags_sec = NULL;
14289 reginfo_sec = NULL;
14291 gptab_data_sec = NULL;
14292 gptab_bss_sec = NULL;
14293 for (o = abfd->sections; o != NULL; o = o->next)
14295 if (strcmp (o->name, ".MIPS.abiflags") == 0)
14297 /* We have found the .MIPS.abiflags section in the output file.
14298 Look through all the link_orders comprising it and remove them.
14299 The data is merged in _bfd_mips_elf_merge_private_bfd_data. */
14300 for (p = o->map_head.link_order; p != NULL; p = p->next)
14302 asection *input_section;
14304 if (p->type != bfd_indirect_link_order)
14306 if (p->type == bfd_data_link_order)
14311 input_section = p->u.indirect.section;
14313 /* Hack: reset the SEC_HAS_CONTENTS flag so that
14314 elf_link_input_bfd ignores this section. */
14315 input_section->flags &= ~SEC_HAS_CONTENTS;
14318 /* Size has been set in _bfd_mips_elf_always_size_sections. */
14319 BFD_ASSERT(o->size == sizeof (Elf_External_ABIFlags_v0));
14321 /* Skip this section later on (I don't think this currently
14322 matters, but someday it might). */
14323 o->map_head.link_order = NULL;
14328 if (strcmp (o->name, ".reginfo") == 0)
14330 memset (®info, 0, sizeof reginfo);
14332 /* We have found the .reginfo section in the output file.
14333 Look through all the link_orders comprising it and merge
14334 the information together. */
14335 for (p = o->map_head.link_order; p != NULL; p = p->next)
14337 asection *input_section;
14339 Elf32_External_RegInfo ext;
14342 if (p->type != bfd_indirect_link_order)
14344 if (p->type == bfd_data_link_order)
14349 input_section = p->u.indirect.section;
14350 input_bfd = input_section->owner;
14352 if (! bfd_get_section_contents (input_bfd, input_section,
14353 &ext, 0, sizeof ext))
14356 bfd_mips_elf32_swap_reginfo_in (input_bfd, &ext, &sub);
14358 reginfo.ri_gprmask |= sub.ri_gprmask;
14359 reginfo.ri_cprmask[0] |= sub.ri_cprmask[0];
14360 reginfo.ri_cprmask[1] |= sub.ri_cprmask[1];
14361 reginfo.ri_cprmask[2] |= sub.ri_cprmask[2];
14362 reginfo.ri_cprmask[3] |= sub.ri_cprmask[3];
14364 /* ri_gp_value is set by the function
14365 mips_elf32_section_processing when the section is
14366 finally written out. */
14368 /* Hack: reset the SEC_HAS_CONTENTS flag so that
14369 elf_link_input_bfd ignores this section. */
14370 input_section->flags &= ~SEC_HAS_CONTENTS;
14373 /* Size has been set in _bfd_mips_elf_always_size_sections. */
14374 BFD_ASSERT(o->size == sizeof (Elf32_External_RegInfo));
14376 /* Skip this section later on (I don't think this currently
14377 matters, but someday it might). */
14378 o->map_head.link_order = NULL;
14383 if (strcmp (o->name, ".mdebug") == 0)
14385 struct extsym_info einfo;
14388 /* We have found the .mdebug section in the output file.
14389 Look through all the link_orders comprising it and merge
14390 the information together. */
14391 symhdr->magic = swap->sym_magic;
14392 /* FIXME: What should the version stamp be? */
14393 symhdr->vstamp = 0;
14394 symhdr->ilineMax = 0;
14395 symhdr->cbLine = 0;
14396 symhdr->idnMax = 0;
14397 symhdr->ipdMax = 0;
14398 symhdr->isymMax = 0;
14399 symhdr->ioptMax = 0;
14400 symhdr->iauxMax = 0;
14401 symhdr->issMax = 0;
14402 symhdr->issExtMax = 0;
14403 symhdr->ifdMax = 0;
14405 symhdr->iextMax = 0;
14407 /* We accumulate the debugging information itself in the
14408 debug_info structure. */
14410 debug.external_dnr = NULL;
14411 debug.external_pdr = NULL;
14412 debug.external_sym = NULL;
14413 debug.external_opt = NULL;
14414 debug.external_aux = NULL;
14416 debug.ssext = debug.ssext_end = NULL;
14417 debug.external_fdr = NULL;
14418 debug.external_rfd = NULL;
14419 debug.external_ext = debug.external_ext_end = NULL;
14421 mdebug_handle = bfd_ecoff_debug_init (abfd, &debug, swap, info);
14422 if (mdebug_handle == NULL)
14426 esym.cobol_main = 0;
14430 esym.asym.iss = issNil;
14431 esym.asym.st = stLocal;
14432 esym.asym.reserved = 0;
14433 esym.asym.index = indexNil;
14435 for (i = 0; i < sizeof (secname) / sizeof (secname[0]); i++)
14437 esym.asym.sc = sc[i];
14438 s = bfd_get_section_by_name (abfd, secname[i]);
14441 esym.asym.value = s->vma;
14442 last = s->vma + s->size;
14445 esym.asym.value = last;
14446 if (!bfd_ecoff_debug_one_external (abfd, &debug, swap,
14447 secname[i], &esym))
14451 for (p = o->map_head.link_order; p != NULL; p = p->next)
14453 asection *input_section;
14455 const struct ecoff_debug_swap *input_swap;
14456 struct ecoff_debug_info input_debug;
14460 if (p->type != bfd_indirect_link_order)
14462 if (p->type == bfd_data_link_order)
14467 input_section = p->u.indirect.section;
14468 input_bfd = input_section->owner;
14470 if (!is_mips_elf (input_bfd))
14472 /* I don't know what a non MIPS ELF bfd would be
14473 doing with a .mdebug section, but I don't really
14474 want to deal with it. */
14478 input_swap = (get_elf_backend_data (input_bfd)
14479 ->elf_backend_ecoff_debug_swap);
14481 BFD_ASSERT (p->size == input_section->size);
14483 /* The ECOFF linking code expects that we have already
14484 read in the debugging information and set up an
14485 ecoff_debug_info structure, so we do that now. */
14486 if (! _bfd_mips_elf_read_ecoff_info (input_bfd, input_section,
14490 if (! (bfd_ecoff_debug_accumulate
14491 (mdebug_handle, abfd, &debug, swap, input_bfd,
14492 &input_debug, input_swap, info)))
14495 /* Loop through the external symbols. For each one with
14496 interesting information, try to find the symbol in
14497 the linker global hash table and save the information
14498 for the output external symbols. */
14499 eraw_src = input_debug.external_ext;
14500 eraw_end = (eraw_src
14501 + (input_debug.symbolic_header.iextMax
14502 * input_swap->external_ext_size));
14504 eraw_src < eraw_end;
14505 eraw_src += input_swap->external_ext_size)
14509 struct mips_elf_link_hash_entry *h;
14511 (*input_swap->swap_ext_in) (input_bfd, eraw_src, &ext);
14512 if (ext.asym.sc == scNil
14513 || ext.asym.sc == scUndefined
14514 || ext.asym.sc == scSUndefined)
14517 name = input_debug.ssext + ext.asym.iss;
14518 h = mips_elf_link_hash_lookup (mips_elf_hash_table (info),
14519 name, FALSE, FALSE, TRUE);
14520 if (h == NULL || h->esym.ifd != -2)
14525 BFD_ASSERT (ext.ifd
14526 < input_debug.symbolic_header.ifdMax);
14527 ext.ifd = input_debug.ifdmap[ext.ifd];
14533 /* Free up the information we just read. */
14534 free (input_debug.line);
14535 free (input_debug.external_dnr);
14536 free (input_debug.external_pdr);
14537 free (input_debug.external_sym);
14538 free (input_debug.external_opt);
14539 free (input_debug.external_aux);
14540 free (input_debug.ss);
14541 free (input_debug.ssext);
14542 free (input_debug.external_fdr);
14543 free (input_debug.external_rfd);
14544 free (input_debug.external_ext);
14546 /* Hack: reset the SEC_HAS_CONTENTS flag so that
14547 elf_link_input_bfd ignores this section. */
14548 input_section->flags &= ~SEC_HAS_CONTENTS;
14551 if (SGI_COMPAT (abfd) && bfd_link_pic (info))
14553 /* Create .rtproc section. */
14554 rtproc_sec = bfd_get_linker_section (abfd, ".rtproc");
14555 if (rtproc_sec == NULL)
14557 flagword flags = (SEC_HAS_CONTENTS | SEC_IN_MEMORY
14558 | SEC_LINKER_CREATED | SEC_READONLY);
14560 rtproc_sec = bfd_make_section_anyway_with_flags (abfd,
14563 if (rtproc_sec == NULL
14564 || ! bfd_set_section_alignment (abfd, rtproc_sec, 4))
14568 if (! mips_elf_create_procedure_table (mdebug_handle, abfd,
14574 /* Build the external symbol information. */
14577 einfo.debug = &debug;
14579 einfo.failed = FALSE;
14580 mips_elf_link_hash_traverse (mips_elf_hash_table (info),
14581 mips_elf_output_extsym, &einfo);
14585 /* Set the size of the .mdebug section. */
14586 o->size = bfd_ecoff_debug_size (abfd, &debug, swap);
14588 /* Skip this section later on (I don't think this currently
14589 matters, but someday it might). */
14590 o->map_head.link_order = NULL;
14595 if (CONST_STRNEQ (o->name, ".gptab."))
14597 const char *subname;
14600 Elf32_External_gptab *ext_tab;
14603 /* The .gptab.sdata and .gptab.sbss sections hold
14604 information describing how the small data area would
14605 change depending upon the -G switch. These sections
14606 not used in executables files. */
14607 if (! bfd_link_relocatable (info))
14609 for (p = o->map_head.link_order; p != NULL; p = p->next)
14611 asection *input_section;
14613 if (p->type != bfd_indirect_link_order)
14615 if (p->type == bfd_data_link_order)
14620 input_section = p->u.indirect.section;
14622 /* Hack: reset the SEC_HAS_CONTENTS flag so that
14623 elf_link_input_bfd ignores this section. */
14624 input_section->flags &= ~SEC_HAS_CONTENTS;
14627 /* Skip this section later on (I don't think this
14628 currently matters, but someday it might). */
14629 o->map_head.link_order = NULL;
14631 /* Really remove the section. */
14632 bfd_section_list_remove (abfd, o);
14633 --abfd->section_count;
14638 /* There is one gptab for initialized data, and one for
14639 uninitialized data. */
14640 if (strcmp (o->name, ".gptab.sdata") == 0)
14641 gptab_data_sec = o;
14642 else if (strcmp (o->name, ".gptab.sbss") == 0)
14646 (*_bfd_error_handler)
14647 (_("%s: illegal section name `%s'"),
14648 bfd_get_filename (abfd), o->name);
14649 bfd_set_error (bfd_error_nonrepresentable_section);
14653 /* The linker script always combines .gptab.data and
14654 .gptab.sdata into .gptab.sdata, and likewise for
14655 .gptab.bss and .gptab.sbss. It is possible that there is
14656 no .sdata or .sbss section in the output file, in which
14657 case we must change the name of the output section. */
14658 subname = o->name + sizeof ".gptab" - 1;
14659 if (bfd_get_section_by_name (abfd, subname) == NULL)
14661 if (o == gptab_data_sec)
14662 o->name = ".gptab.data";
14664 o->name = ".gptab.bss";
14665 subname = o->name + sizeof ".gptab" - 1;
14666 BFD_ASSERT (bfd_get_section_by_name (abfd, subname) != NULL);
14669 /* Set up the first entry. */
14671 amt = c * sizeof (Elf32_gptab);
14672 tab = bfd_malloc (amt);
14675 tab[0].gt_header.gt_current_g_value = elf_gp_size (abfd);
14676 tab[0].gt_header.gt_unused = 0;
14678 /* Combine the input sections. */
14679 for (p = o->map_head.link_order; p != NULL; p = p->next)
14681 asection *input_section;
14683 bfd_size_type size;
14684 unsigned long last;
14685 bfd_size_type gpentry;
14687 if (p->type != bfd_indirect_link_order)
14689 if (p->type == bfd_data_link_order)
14694 input_section = p->u.indirect.section;
14695 input_bfd = input_section->owner;
14697 /* Combine the gptab entries for this input section one
14698 by one. We know that the input gptab entries are
14699 sorted by ascending -G value. */
14700 size = input_section->size;
14702 for (gpentry = sizeof (Elf32_External_gptab);
14704 gpentry += sizeof (Elf32_External_gptab))
14706 Elf32_External_gptab ext_gptab;
14707 Elf32_gptab int_gptab;
14713 if (! (bfd_get_section_contents
14714 (input_bfd, input_section, &ext_gptab, gpentry,
14715 sizeof (Elf32_External_gptab))))
14721 bfd_mips_elf32_swap_gptab_in (input_bfd, &ext_gptab,
14723 val = int_gptab.gt_entry.gt_g_value;
14724 add = int_gptab.gt_entry.gt_bytes - last;
14727 for (look = 1; look < c; look++)
14729 if (tab[look].gt_entry.gt_g_value >= val)
14730 tab[look].gt_entry.gt_bytes += add;
14732 if (tab[look].gt_entry.gt_g_value == val)
14738 Elf32_gptab *new_tab;
14741 /* We need a new table entry. */
14742 amt = (bfd_size_type) (c + 1) * sizeof (Elf32_gptab);
14743 new_tab = bfd_realloc (tab, amt);
14744 if (new_tab == NULL)
14750 tab[c].gt_entry.gt_g_value = val;
14751 tab[c].gt_entry.gt_bytes = add;
14753 /* Merge in the size for the next smallest -G
14754 value, since that will be implied by this new
14757 for (look = 1; look < c; look++)
14759 if (tab[look].gt_entry.gt_g_value < val
14761 || (tab[look].gt_entry.gt_g_value
14762 > tab[max].gt_entry.gt_g_value)))
14766 tab[c].gt_entry.gt_bytes +=
14767 tab[max].gt_entry.gt_bytes;
14772 last = int_gptab.gt_entry.gt_bytes;
14775 /* Hack: reset the SEC_HAS_CONTENTS flag so that
14776 elf_link_input_bfd ignores this section. */
14777 input_section->flags &= ~SEC_HAS_CONTENTS;
14780 /* The table must be sorted by -G value. */
14782 qsort (tab + 1, c - 1, sizeof (tab[0]), gptab_compare);
14784 /* Swap out the table. */
14785 amt = (bfd_size_type) c * sizeof (Elf32_External_gptab);
14786 ext_tab = bfd_alloc (abfd, amt);
14787 if (ext_tab == NULL)
14793 for (j = 0; j < c; j++)
14794 bfd_mips_elf32_swap_gptab_out (abfd, tab + j, ext_tab + j);
14797 o->size = c * sizeof (Elf32_External_gptab);
14798 o->contents = (bfd_byte *) ext_tab;
14800 /* Skip this section later on (I don't think this currently
14801 matters, but someday it might). */
14802 o->map_head.link_order = NULL;
14806 /* Invoke the regular ELF backend linker to do all the work. */
14807 if (!bfd_elf_final_link (abfd, info))
14810 /* Now write out the computed sections. */
14812 if (abiflags_sec != NULL)
14814 Elf_External_ABIFlags_v0 ext;
14815 Elf_Internal_ABIFlags_v0 *abiflags;
14817 abiflags = &mips_elf_tdata (abfd)->abiflags;
14819 /* Set up the abiflags if no valid input sections were found. */
14820 if (!mips_elf_tdata (abfd)->abiflags_valid)
14822 infer_mips_abiflags (abfd, abiflags);
14823 mips_elf_tdata (abfd)->abiflags_valid = TRUE;
14825 bfd_mips_elf_swap_abiflags_v0_out (abfd, abiflags, &ext);
14826 if (! bfd_set_section_contents (abfd, abiflags_sec, &ext, 0, sizeof ext))
14830 if (reginfo_sec != NULL)
14832 Elf32_External_RegInfo ext;
14834 bfd_mips_elf32_swap_reginfo_out (abfd, ®info, &ext);
14835 if (! bfd_set_section_contents (abfd, reginfo_sec, &ext, 0, sizeof ext))
14839 if (mdebug_sec != NULL)
14841 BFD_ASSERT (abfd->output_has_begun);
14842 if (! bfd_ecoff_write_accumulated_debug (mdebug_handle, abfd, &debug,
14844 mdebug_sec->filepos))
14847 bfd_ecoff_debug_free (mdebug_handle, abfd, &debug, swap, info);
14850 if (gptab_data_sec != NULL)
14852 if (! bfd_set_section_contents (abfd, gptab_data_sec,
14853 gptab_data_sec->contents,
14854 0, gptab_data_sec->size))
14858 if (gptab_bss_sec != NULL)
14860 if (! bfd_set_section_contents (abfd, gptab_bss_sec,
14861 gptab_bss_sec->contents,
14862 0, gptab_bss_sec->size))
14866 if (SGI_COMPAT (abfd))
14868 rtproc_sec = bfd_get_section_by_name (abfd, ".rtproc");
14869 if (rtproc_sec != NULL)
14871 if (! bfd_set_section_contents (abfd, rtproc_sec,
14872 rtproc_sec->contents,
14873 0, rtproc_sec->size))
14881 /* Merge object file header flags from IBFD into OBFD. Raise an error
14882 if there are conflicting settings. */
14885 mips_elf_merge_obj_e_flags (bfd *ibfd, bfd *obfd)
14887 struct mips_elf_obj_tdata *out_tdata = mips_elf_tdata (obfd);
14888 flagword old_flags;
14889 flagword new_flags;
14892 new_flags = elf_elfheader (ibfd)->e_flags;
14893 elf_elfheader (obfd)->e_flags |= new_flags & EF_MIPS_NOREORDER;
14894 old_flags = elf_elfheader (obfd)->e_flags;
14896 /* Check flag compatibility. */
14898 new_flags &= ~EF_MIPS_NOREORDER;
14899 old_flags &= ~EF_MIPS_NOREORDER;
14901 /* Some IRIX 6 BSD-compatibility objects have this bit set. It
14902 doesn't seem to matter. */
14903 new_flags &= ~EF_MIPS_XGOT;
14904 old_flags &= ~EF_MIPS_XGOT;
14906 /* MIPSpro generates ucode info in n64 objects. Again, we should
14907 just be able to ignore this. */
14908 new_flags &= ~EF_MIPS_UCODE;
14909 old_flags &= ~EF_MIPS_UCODE;
14911 /* DSOs should only be linked with CPIC code. */
14912 if ((ibfd->flags & DYNAMIC) != 0)
14913 new_flags |= EF_MIPS_PIC | EF_MIPS_CPIC;
14915 if (new_flags == old_flags)
14920 if (((new_flags & (EF_MIPS_PIC | EF_MIPS_CPIC)) != 0)
14921 != ((old_flags & (EF_MIPS_PIC | EF_MIPS_CPIC)) != 0))
14923 (*_bfd_error_handler)
14924 (_("%B: warning: linking abicalls files with non-abicalls files"),
14929 if (new_flags & (EF_MIPS_PIC | EF_MIPS_CPIC))
14930 elf_elfheader (obfd)->e_flags |= EF_MIPS_CPIC;
14931 if (! (new_flags & EF_MIPS_PIC))
14932 elf_elfheader (obfd)->e_flags &= ~EF_MIPS_PIC;
14934 new_flags &= ~ (EF_MIPS_PIC | EF_MIPS_CPIC);
14935 old_flags &= ~ (EF_MIPS_PIC | EF_MIPS_CPIC);
14937 /* Compare the ISAs. */
14938 if (mips_32bit_flags_p (old_flags) != mips_32bit_flags_p (new_flags))
14940 (*_bfd_error_handler)
14941 (_("%B: linking 32-bit code with 64-bit code"),
14945 else if (!mips_mach_extends_p (bfd_get_mach (ibfd), bfd_get_mach (obfd)))
14947 /* OBFD's ISA isn't the same as, or an extension of, IBFD's. */
14948 if (mips_mach_extends_p (bfd_get_mach (obfd), bfd_get_mach (ibfd)))
14950 /* Copy the architecture info from IBFD to OBFD. Also copy
14951 the 32-bit flag (if set) so that we continue to recognise
14952 OBFD as a 32-bit binary. */
14953 bfd_set_arch_info (obfd, bfd_get_arch_info (ibfd));
14954 elf_elfheader (obfd)->e_flags &= ~(EF_MIPS_ARCH | EF_MIPS_MACH);
14955 elf_elfheader (obfd)->e_flags
14956 |= new_flags & (EF_MIPS_ARCH | EF_MIPS_MACH | EF_MIPS_32BITMODE);
14958 /* Update the ABI flags isa_level, isa_rev, isa_ext fields. */
14959 update_mips_abiflags_isa (obfd, &out_tdata->abiflags);
14961 /* Copy across the ABI flags if OBFD doesn't use them
14962 and if that was what caused us to treat IBFD as 32-bit. */
14963 if ((old_flags & EF_MIPS_ABI) == 0
14964 && mips_32bit_flags_p (new_flags)
14965 && !mips_32bit_flags_p (new_flags & ~EF_MIPS_ABI))
14966 elf_elfheader (obfd)->e_flags |= new_flags & EF_MIPS_ABI;
14970 /* The ISAs aren't compatible. */
14971 (*_bfd_error_handler)
14972 (_("%B: linking %s module with previous %s modules"),
14974 bfd_printable_name (ibfd),
14975 bfd_printable_name (obfd));
14980 new_flags &= ~(EF_MIPS_ARCH | EF_MIPS_MACH | EF_MIPS_32BITMODE);
14981 old_flags &= ~(EF_MIPS_ARCH | EF_MIPS_MACH | EF_MIPS_32BITMODE);
14983 /* Compare ABIs. The 64-bit ABI does not use EF_MIPS_ABI. But, it
14984 does set EI_CLASS differently from any 32-bit ABI. */
14985 if ((new_flags & EF_MIPS_ABI) != (old_flags & EF_MIPS_ABI)
14986 || (elf_elfheader (ibfd)->e_ident[EI_CLASS]
14987 != elf_elfheader (obfd)->e_ident[EI_CLASS]))
14989 /* Only error if both are set (to different values). */
14990 if (((new_flags & EF_MIPS_ABI) && (old_flags & EF_MIPS_ABI))
14991 || (elf_elfheader (ibfd)->e_ident[EI_CLASS]
14992 != elf_elfheader (obfd)->e_ident[EI_CLASS]))
14994 (*_bfd_error_handler)
14995 (_("%B: ABI mismatch: linking %s module with previous %s modules"),
14997 elf_mips_abi_name (ibfd),
14998 elf_mips_abi_name (obfd));
15001 new_flags &= ~EF_MIPS_ABI;
15002 old_flags &= ~EF_MIPS_ABI;
15005 /* Compare ASEs. Forbid linking MIPS16 and microMIPS ASE modules together
15006 and allow arbitrary mixing of the remaining ASEs (retain the union). */
15007 if ((new_flags & EF_MIPS_ARCH_ASE) != (old_flags & EF_MIPS_ARCH_ASE))
15009 int old_micro = old_flags & EF_MIPS_ARCH_ASE_MICROMIPS;
15010 int new_micro = new_flags & EF_MIPS_ARCH_ASE_MICROMIPS;
15011 int old_m16 = old_flags & EF_MIPS_ARCH_ASE_M16;
15012 int new_m16 = new_flags & EF_MIPS_ARCH_ASE_M16;
15013 int micro_mis = old_m16 && new_micro;
15014 int m16_mis = old_micro && new_m16;
15016 if (m16_mis || micro_mis)
15018 (*_bfd_error_handler)
15019 (_("%B: ASE mismatch: linking %s module with previous %s modules"),
15021 m16_mis ? "MIPS16" : "microMIPS",
15022 m16_mis ? "microMIPS" : "MIPS16");
15026 elf_elfheader (obfd)->e_flags |= new_flags & EF_MIPS_ARCH_ASE;
15028 new_flags &= ~ EF_MIPS_ARCH_ASE;
15029 old_flags &= ~ EF_MIPS_ARCH_ASE;
15032 /* Compare NaN encodings. */
15033 if ((new_flags & EF_MIPS_NAN2008) != (old_flags & EF_MIPS_NAN2008))
15035 _bfd_error_handler (_("%B: linking %s module with previous %s modules"),
15037 (new_flags & EF_MIPS_NAN2008
15038 ? "-mnan=2008" : "-mnan=legacy"),
15039 (old_flags & EF_MIPS_NAN2008
15040 ? "-mnan=2008" : "-mnan=legacy"));
15042 new_flags &= ~EF_MIPS_NAN2008;
15043 old_flags &= ~EF_MIPS_NAN2008;
15046 /* Compare FP64 state. */
15047 if ((new_flags & EF_MIPS_FP64) != (old_flags & EF_MIPS_FP64))
15049 _bfd_error_handler (_("%B: linking %s module with previous %s modules"),
15051 (new_flags & EF_MIPS_FP64
15052 ? "-mfp64" : "-mfp32"),
15053 (old_flags & EF_MIPS_FP64
15054 ? "-mfp64" : "-mfp32"));
15056 new_flags &= ~EF_MIPS_FP64;
15057 old_flags &= ~EF_MIPS_FP64;
15060 /* Warn about any other mismatches */
15061 if (new_flags != old_flags)
15063 (*_bfd_error_handler)
15064 (_("%B: uses different e_flags (0x%lx) fields than previous modules "
15066 ibfd, (unsigned long) new_flags,
15067 (unsigned long) old_flags);
15074 /* Merge object attributes from IBFD into OBFD. Raise an error if
15075 there are conflicting attributes. */
15077 mips_elf_merge_obj_attributes (bfd *ibfd, bfd *obfd)
15079 obj_attribute *in_attr;
15080 obj_attribute *out_attr;
15084 abi_fp_bfd = mips_elf_tdata (obfd)->abi_fp_bfd;
15085 in_attr = elf_known_obj_attributes (ibfd)[OBJ_ATTR_GNU];
15086 if (!abi_fp_bfd && in_attr[Tag_GNU_MIPS_ABI_FP].i != Val_GNU_MIPS_ABI_FP_ANY)
15087 mips_elf_tdata (obfd)->abi_fp_bfd = ibfd;
15089 abi_msa_bfd = mips_elf_tdata (obfd)->abi_msa_bfd;
15091 && in_attr[Tag_GNU_MIPS_ABI_MSA].i != Val_GNU_MIPS_ABI_MSA_ANY)
15092 mips_elf_tdata (obfd)->abi_msa_bfd = ibfd;
15094 if (!elf_known_obj_attributes_proc (obfd)[0].i)
15096 /* This is the first object. Copy the attributes. */
15097 _bfd_elf_copy_obj_attributes (ibfd, obfd);
15099 /* Use the Tag_null value to indicate the attributes have been
15101 elf_known_obj_attributes_proc (obfd)[0].i = 1;
15106 /* Check for conflicting Tag_GNU_MIPS_ABI_FP attributes and merge
15107 non-conflicting ones. */
15108 out_attr = elf_known_obj_attributes (obfd)[OBJ_ATTR_GNU];
15109 if (in_attr[Tag_GNU_MIPS_ABI_FP].i != out_attr[Tag_GNU_MIPS_ABI_FP].i)
15113 out_fp = out_attr[Tag_GNU_MIPS_ABI_FP].i;
15114 in_fp = in_attr[Tag_GNU_MIPS_ABI_FP].i;
15115 out_attr[Tag_GNU_MIPS_ABI_FP].type = 1;
15116 if (out_fp == Val_GNU_MIPS_ABI_FP_ANY)
15117 out_attr[Tag_GNU_MIPS_ABI_FP].i = in_fp;
15118 else if (out_fp == Val_GNU_MIPS_ABI_FP_XX
15119 && (in_fp == Val_GNU_MIPS_ABI_FP_DOUBLE
15120 || in_fp == Val_GNU_MIPS_ABI_FP_64
15121 || in_fp == Val_GNU_MIPS_ABI_FP_64A))
15123 mips_elf_tdata (obfd)->abi_fp_bfd = ibfd;
15124 out_attr[Tag_GNU_MIPS_ABI_FP].i = in_attr[Tag_GNU_MIPS_ABI_FP].i;
15126 else if (in_fp == Val_GNU_MIPS_ABI_FP_XX
15127 && (out_fp == Val_GNU_MIPS_ABI_FP_DOUBLE
15128 || out_fp == Val_GNU_MIPS_ABI_FP_64
15129 || out_fp == Val_GNU_MIPS_ABI_FP_64A))
15130 /* Keep the current setting. */;
15131 else if (out_fp == Val_GNU_MIPS_ABI_FP_64A
15132 && in_fp == Val_GNU_MIPS_ABI_FP_64)
15134 mips_elf_tdata (obfd)->abi_fp_bfd = ibfd;
15135 out_attr[Tag_GNU_MIPS_ABI_FP].i = in_attr[Tag_GNU_MIPS_ABI_FP].i;
15137 else if (in_fp == Val_GNU_MIPS_ABI_FP_64A
15138 && out_fp == Val_GNU_MIPS_ABI_FP_64)
15139 /* Keep the current setting. */;
15140 else if (in_fp != Val_GNU_MIPS_ABI_FP_ANY)
15142 const char *out_string, *in_string;
15144 out_string = _bfd_mips_fp_abi_string (out_fp);
15145 in_string = _bfd_mips_fp_abi_string (in_fp);
15146 /* First warn about cases involving unrecognised ABIs. */
15147 if (!out_string && !in_string)
15149 (_("Warning: %B uses unknown floating point ABI %d "
15150 "(set by %B), %B uses unknown floating point ABI %d"),
15151 obfd, abi_fp_bfd, ibfd, out_fp, in_fp);
15152 else if (!out_string)
15154 (_("Warning: %B uses unknown floating point ABI %d "
15155 "(set by %B), %B uses %s"),
15156 obfd, abi_fp_bfd, ibfd, out_fp, in_string);
15157 else if (!in_string)
15159 (_("Warning: %B uses %s (set by %B), "
15160 "%B uses unknown floating point ABI %d"),
15161 obfd, abi_fp_bfd, ibfd, out_string, in_fp);
15164 /* If one of the bfds is soft-float, the other must be
15165 hard-float. The exact choice of hard-float ABI isn't
15166 really relevant to the error message. */
15167 if (in_fp == Val_GNU_MIPS_ABI_FP_SOFT)
15168 out_string = "-mhard-float";
15169 else if (out_fp == Val_GNU_MIPS_ABI_FP_SOFT)
15170 in_string = "-mhard-float";
15172 (_("Warning: %B uses %s (set by %B), %B uses %s"),
15173 obfd, abi_fp_bfd, ibfd, out_string, in_string);
15178 /* Check for conflicting Tag_GNU_MIPS_ABI_MSA attributes and merge
15179 non-conflicting ones. */
15180 if (in_attr[Tag_GNU_MIPS_ABI_MSA].i != out_attr[Tag_GNU_MIPS_ABI_MSA].i)
15182 out_attr[Tag_GNU_MIPS_ABI_MSA].type = 1;
15183 if (out_attr[Tag_GNU_MIPS_ABI_MSA].i == Val_GNU_MIPS_ABI_MSA_ANY)
15184 out_attr[Tag_GNU_MIPS_ABI_MSA].i = in_attr[Tag_GNU_MIPS_ABI_MSA].i;
15185 else if (in_attr[Tag_GNU_MIPS_ABI_MSA].i != Val_GNU_MIPS_ABI_MSA_ANY)
15186 switch (out_attr[Tag_GNU_MIPS_ABI_MSA].i)
15188 case Val_GNU_MIPS_ABI_MSA_128:
15190 (_("Warning: %B uses %s (set by %B), "
15191 "%B uses unknown MSA ABI %d"),
15192 obfd, abi_msa_bfd, ibfd,
15193 "-mmsa", in_attr[Tag_GNU_MIPS_ABI_MSA].i);
15197 switch (in_attr[Tag_GNU_MIPS_ABI_MSA].i)
15199 case Val_GNU_MIPS_ABI_MSA_128:
15201 (_("Warning: %B uses unknown MSA ABI %d "
15202 "(set by %B), %B uses %s"),
15203 obfd, abi_msa_bfd, ibfd,
15204 out_attr[Tag_GNU_MIPS_ABI_MSA].i, "-mmsa");
15209 (_("Warning: %B uses unknown MSA ABI %d "
15210 "(set by %B), %B uses unknown MSA ABI %d"),
15211 obfd, abi_msa_bfd, ibfd,
15212 out_attr[Tag_GNU_MIPS_ABI_MSA].i,
15213 in_attr[Tag_GNU_MIPS_ABI_MSA].i);
15219 /* Merge Tag_compatibility attributes and any common GNU ones. */
15220 return _bfd_elf_merge_object_attributes (ibfd, obfd);
15223 /* Merge object ABI flags from IBFD into OBFD. Raise an error if
15224 there are conflicting settings. */
15227 mips_elf_merge_obj_abiflags (bfd *ibfd, bfd *obfd)
15229 obj_attribute *out_attr = elf_known_obj_attributes (obfd)[OBJ_ATTR_GNU];
15230 struct mips_elf_obj_tdata *out_tdata = mips_elf_tdata (obfd);
15231 struct mips_elf_obj_tdata *in_tdata = mips_elf_tdata (ibfd);
15233 /* Update the output abiflags fp_abi using the computed fp_abi. */
15234 out_tdata->abiflags.fp_abi = out_attr[Tag_GNU_MIPS_ABI_FP].i;
15236 #define max(a, b) ((a) > (b) ? (a) : (b))
15237 /* Merge abiflags. */
15238 out_tdata->abiflags.isa_level = max (out_tdata->abiflags.isa_level,
15239 in_tdata->abiflags.isa_level);
15240 out_tdata->abiflags.isa_rev = max (out_tdata->abiflags.isa_rev,
15241 in_tdata->abiflags.isa_rev);
15242 out_tdata->abiflags.gpr_size = max (out_tdata->abiflags.gpr_size,
15243 in_tdata->abiflags.gpr_size);
15244 out_tdata->abiflags.cpr1_size = max (out_tdata->abiflags.cpr1_size,
15245 in_tdata->abiflags.cpr1_size);
15246 out_tdata->abiflags.cpr2_size = max (out_tdata->abiflags.cpr2_size,
15247 in_tdata->abiflags.cpr2_size);
15249 out_tdata->abiflags.ases |= in_tdata->abiflags.ases;
15250 out_tdata->abiflags.flags1 |= in_tdata->abiflags.flags1;
15255 /* Merge backend specific data from an object file to the output
15256 object file when linking. */
15259 _bfd_mips_elf_merge_private_bfd_data (bfd *ibfd, bfd *obfd)
15261 struct mips_elf_obj_tdata *out_tdata;
15262 struct mips_elf_obj_tdata *in_tdata;
15263 bfd_boolean null_input_bfd = TRUE;
15267 /* Check if we have the same endianness. */
15268 if (! _bfd_generic_verify_endian_match (ibfd, obfd))
15270 (*_bfd_error_handler)
15271 (_("%B: endianness incompatible with that of the selected emulation"),
15276 if (!is_mips_elf (ibfd) || !is_mips_elf (obfd))
15279 in_tdata = mips_elf_tdata (ibfd);
15280 out_tdata = mips_elf_tdata (obfd);
15282 if (strcmp (bfd_get_target (ibfd), bfd_get_target (obfd)) != 0)
15284 (*_bfd_error_handler)
15285 (_("%B: ABI is incompatible with that of the selected emulation"),
15290 /* Check to see if the input BFD actually contains any sections. If not,
15291 then it has no attributes, and its flags may not have been initialized
15292 either, but it cannot actually cause any incompatibility. */
15293 for (sec = ibfd->sections; sec != NULL; sec = sec->next)
15295 /* Ignore synthetic sections and empty .text, .data and .bss sections
15296 which are automatically generated by gas. Also ignore fake
15297 (s)common sections, since merely defining a common symbol does
15298 not affect compatibility. */
15299 if ((sec->flags & SEC_IS_COMMON) == 0
15300 && strcmp (sec->name, ".reginfo")
15301 && strcmp (sec->name, ".mdebug")
15303 || (strcmp (sec->name, ".text")
15304 && strcmp (sec->name, ".data")
15305 && strcmp (sec->name, ".bss"))))
15307 null_input_bfd = FALSE;
15311 if (null_input_bfd)
15314 /* Populate abiflags using existing information. */
15315 if (in_tdata->abiflags_valid)
15317 obj_attribute *in_attr = elf_known_obj_attributes (ibfd)[OBJ_ATTR_GNU];
15318 Elf_Internal_ABIFlags_v0 in_abiflags;
15319 Elf_Internal_ABIFlags_v0 abiflags;
15321 /* Set up the FP ABI attribute from the abiflags if it is not already
15323 if (in_attr[Tag_GNU_MIPS_ABI_FP].i == Val_GNU_MIPS_ABI_FP_ANY)
15324 in_attr[Tag_GNU_MIPS_ABI_FP].i = in_tdata->abiflags.fp_abi;
15326 infer_mips_abiflags (ibfd, &abiflags);
15327 in_abiflags = in_tdata->abiflags;
15329 /* It is not possible to infer the correct ISA revision
15330 for R3 or R5 so drop down to R2 for the checks. */
15331 if (in_abiflags.isa_rev == 3 || in_abiflags.isa_rev == 5)
15332 in_abiflags.isa_rev = 2;
15334 if (LEVEL_REV (in_abiflags.isa_level, in_abiflags.isa_rev)
15335 < LEVEL_REV (abiflags.isa_level, abiflags.isa_rev))
15336 (*_bfd_error_handler)
15337 (_("%B: warning: Inconsistent ISA between e_flags and "
15338 ".MIPS.abiflags"), ibfd);
15339 if (abiflags.fp_abi != Val_GNU_MIPS_ABI_FP_ANY
15340 && in_abiflags.fp_abi != abiflags.fp_abi)
15341 (*_bfd_error_handler)
15342 (_("%B: warning: Inconsistent FP ABI between .gnu.attributes and "
15343 ".MIPS.abiflags"), ibfd);
15344 if ((in_abiflags.ases & abiflags.ases) != abiflags.ases)
15345 (*_bfd_error_handler)
15346 (_("%B: warning: Inconsistent ASEs between e_flags and "
15347 ".MIPS.abiflags"), ibfd);
15348 /* The isa_ext is allowed to be an extension of what can be inferred
15350 if (!mips_mach_extends_p (bfd_mips_isa_ext_mach (abiflags.isa_ext),
15351 bfd_mips_isa_ext_mach (in_abiflags.isa_ext)))
15352 (*_bfd_error_handler)
15353 (_("%B: warning: Inconsistent ISA extensions between e_flags and "
15354 ".MIPS.abiflags"), ibfd);
15355 if (in_abiflags.flags2 != 0)
15356 (*_bfd_error_handler)
15357 (_("%B: warning: Unexpected flag in the flags2 field of "
15358 ".MIPS.abiflags (0x%lx)"), ibfd,
15359 (unsigned long) in_abiflags.flags2);
15363 infer_mips_abiflags (ibfd, &in_tdata->abiflags);
15364 in_tdata->abiflags_valid = TRUE;
15367 if (!out_tdata->abiflags_valid)
15369 /* Copy input abiflags if output abiflags are not already valid. */
15370 out_tdata->abiflags = in_tdata->abiflags;
15371 out_tdata->abiflags_valid = TRUE;
15374 if (! elf_flags_init (obfd))
15376 elf_flags_init (obfd) = TRUE;
15377 elf_elfheader (obfd)->e_flags = elf_elfheader (ibfd)->e_flags;
15378 elf_elfheader (obfd)->e_ident[EI_CLASS]
15379 = elf_elfheader (ibfd)->e_ident[EI_CLASS];
15381 if (bfd_get_arch (obfd) == bfd_get_arch (ibfd)
15382 && (bfd_get_arch_info (obfd)->the_default
15383 || mips_mach_extends_p (bfd_get_mach (obfd),
15384 bfd_get_mach (ibfd))))
15386 if (! bfd_set_arch_mach (obfd, bfd_get_arch (ibfd),
15387 bfd_get_mach (ibfd)))
15390 /* Update the ABI flags isa_level, isa_rev and isa_ext fields. */
15391 update_mips_abiflags_isa (obfd, &out_tdata->abiflags);
15397 ok = mips_elf_merge_obj_e_flags (ibfd, obfd);
15399 ok = mips_elf_merge_obj_attributes (ibfd, obfd) && ok;
15401 ok = mips_elf_merge_obj_abiflags (ibfd, obfd) && ok;
15405 bfd_set_error (bfd_error_bad_value);
15412 /* Function to keep MIPS specific file flags like as EF_MIPS_PIC. */
15415 _bfd_mips_elf_set_private_flags (bfd *abfd, flagword flags)
15417 BFD_ASSERT (!elf_flags_init (abfd)
15418 || elf_elfheader (abfd)->e_flags == flags);
15420 elf_elfheader (abfd)->e_flags = flags;
15421 elf_flags_init (abfd) = TRUE;
15426 _bfd_mips_elf_get_target_dtag (bfd_vma dtag)
15430 default: return "";
15431 case DT_MIPS_RLD_VERSION:
15432 return "MIPS_RLD_VERSION";
15433 case DT_MIPS_TIME_STAMP:
15434 return "MIPS_TIME_STAMP";
15435 case DT_MIPS_ICHECKSUM:
15436 return "MIPS_ICHECKSUM";
15437 case DT_MIPS_IVERSION:
15438 return "MIPS_IVERSION";
15439 case DT_MIPS_FLAGS:
15440 return "MIPS_FLAGS";
15441 case DT_MIPS_BASE_ADDRESS:
15442 return "MIPS_BASE_ADDRESS";
15444 return "MIPS_MSYM";
15445 case DT_MIPS_CONFLICT:
15446 return "MIPS_CONFLICT";
15447 case DT_MIPS_LIBLIST:
15448 return "MIPS_LIBLIST";
15449 case DT_MIPS_LOCAL_GOTNO:
15450 return "MIPS_LOCAL_GOTNO";
15451 case DT_MIPS_CONFLICTNO:
15452 return "MIPS_CONFLICTNO";
15453 case DT_MIPS_LIBLISTNO:
15454 return "MIPS_LIBLISTNO";
15455 case DT_MIPS_SYMTABNO:
15456 return "MIPS_SYMTABNO";
15457 case DT_MIPS_UNREFEXTNO:
15458 return "MIPS_UNREFEXTNO";
15459 case DT_MIPS_GOTSYM:
15460 return "MIPS_GOTSYM";
15461 case DT_MIPS_HIPAGENO:
15462 return "MIPS_HIPAGENO";
15463 case DT_MIPS_RLD_MAP:
15464 return "MIPS_RLD_MAP";
15465 case DT_MIPS_RLD_MAP_REL:
15466 return "MIPS_RLD_MAP_REL";
15467 case DT_MIPS_DELTA_CLASS:
15468 return "MIPS_DELTA_CLASS";
15469 case DT_MIPS_DELTA_CLASS_NO:
15470 return "MIPS_DELTA_CLASS_NO";
15471 case DT_MIPS_DELTA_INSTANCE:
15472 return "MIPS_DELTA_INSTANCE";
15473 case DT_MIPS_DELTA_INSTANCE_NO:
15474 return "MIPS_DELTA_INSTANCE_NO";
15475 case DT_MIPS_DELTA_RELOC:
15476 return "MIPS_DELTA_RELOC";
15477 case DT_MIPS_DELTA_RELOC_NO:
15478 return "MIPS_DELTA_RELOC_NO";
15479 case DT_MIPS_DELTA_SYM:
15480 return "MIPS_DELTA_SYM";
15481 case DT_MIPS_DELTA_SYM_NO:
15482 return "MIPS_DELTA_SYM_NO";
15483 case DT_MIPS_DELTA_CLASSSYM:
15484 return "MIPS_DELTA_CLASSSYM";
15485 case DT_MIPS_DELTA_CLASSSYM_NO:
15486 return "MIPS_DELTA_CLASSSYM_NO";
15487 case DT_MIPS_CXX_FLAGS:
15488 return "MIPS_CXX_FLAGS";
15489 case DT_MIPS_PIXIE_INIT:
15490 return "MIPS_PIXIE_INIT";
15491 case DT_MIPS_SYMBOL_LIB:
15492 return "MIPS_SYMBOL_LIB";
15493 case DT_MIPS_LOCALPAGE_GOTIDX:
15494 return "MIPS_LOCALPAGE_GOTIDX";
15495 case DT_MIPS_LOCAL_GOTIDX:
15496 return "MIPS_LOCAL_GOTIDX";
15497 case DT_MIPS_HIDDEN_GOTIDX:
15498 return "MIPS_HIDDEN_GOTIDX";
15499 case DT_MIPS_PROTECTED_GOTIDX:
15500 return "MIPS_PROTECTED_GOT_IDX";
15501 case DT_MIPS_OPTIONS:
15502 return "MIPS_OPTIONS";
15503 case DT_MIPS_INTERFACE:
15504 return "MIPS_INTERFACE";
15505 case DT_MIPS_DYNSTR_ALIGN:
15506 return "DT_MIPS_DYNSTR_ALIGN";
15507 case DT_MIPS_INTERFACE_SIZE:
15508 return "DT_MIPS_INTERFACE_SIZE";
15509 case DT_MIPS_RLD_TEXT_RESOLVE_ADDR:
15510 return "DT_MIPS_RLD_TEXT_RESOLVE_ADDR";
15511 case DT_MIPS_PERF_SUFFIX:
15512 return "DT_MIPS_PERF_SUFFIX";
15513 case DT_MIPS_COMPACT_SIZE:
15514 return "DT_MIPS_COMPACT_SIZE";
15515 case DT_MIPS_GP_VALUE:
15516 return "DT_MIPS_GP_VALUE";
15517 case DT_MIPS_AUX_DYNAMIC:
15518 return "DT_MIPS_AUX_DYNAMIC";
15519 case DT_MIPS_PLTGOT:
15520 return "DT_MIPS_PLTGOT";
15521 case DT_MIPS_RWPLT:
15522 return "DT_MIPS_RWPLT";
15526 /* Return the meaning of Tag_GNU_MIPS_ABI_FP value FP, or null if
15530 _bfd_mips_fp_abi_string (int fp)
15534 /* These strings aren't translated because they're simply
15536 case Val_GNU_MIPS_ABI_FP_DOUBLE:
15537 return "-mdouble-float";
15539 case Val_GNU_MIPS_ABI_FP_SINGLE:
15540 return "-msingle-float";
15542 case Val_GNU_MIPS_ABI_FP_SOFT:
15543 return "-msoft-float";
15545 case Val_GNU_MIPS_ABI_FP_OLD_64:
15546 return _("-mips32r2 -mfp64 (12 callee-saved)");
15548 case Val_GNU_MIPS_ABI_FP_XX:
15551 case Val_GNU_MIPS_ABI_FP_64:
15552 return "-mgp32 -mfp64";
15554 case Val_GNU_MIPS_ABI_FP_64A:
15555 return "-mgp32 -mfp64 -mno-odd-spreg";
15563 print_mips_ases (FILE *file, unsigned int mask)
15565 if (mask & AFL_ASE_DSP)
15566 fputs ("\n\tDSP ASE", file);
15567 if (mask & AFL_ASE_DSPR2)
15568 fputs ("\n\tDSP R2 ASE", file);
15569 if (mask & AFL_ASE_DSPR3)
15570 fputs ("\n\tDSP R3 ASE", file);
15571 if (mask & AFL_ASE_EVA)
15572 fputs ("\n\tEnhanced VA Scheme", file);
15573 if (mask & AFL_ASE_MCU)
15574 fputs ("\n\tMCU (MicroController) ASE", file);
15575 if (mask & AFL_ASE_MDMX)
15576 fputs ("\n\tMDMX ASE", file);
15577 if (mask & AFL_ASE_MIPS3D)
15578 fputs ("\n\tMIPS-3D ASE", file);
15579 if (mask & AFL_ASE_MT)
15580 fputs ("\n\tMT ASE", file);
15581 if (mask & AFL_ASE_SMARTMIPS)
15582 fputs ("\n\tSmartMIPS ASE", file);
15583 if (mask & AFL_ASE_VIRT)
15584 fputs ("\n\tVZ ASE", file);
15585 if (mask & AFL_ASE_MSA)
15586 fputs ("\n\tMSA ASE", file);
15587 if (mask & AFL_ASE_MIPS16)
15588 fputs ("\n\tMIPS16 ASE", file);
15589 if (mask & AFL_ASE_MICROMIPS)
15590 fputs ("\n\tMICROMIPS ASE", file);
15591 if (mask & AFL_ASE_XPA)
15592 fputs ("\n\tXPA ASE", file);
15594 fprintf (file, "\n\t%s", _("None"));
15595 else if ((mask & ~AFL_ASE_MASK) != 0)
15596 fprintf (stdout, "\n\t%s (%x)", _("Unknown"), mask & ~AFL_ASE_MASK);
15600 print_mips_isa_ext (FILE *file, unsigned int isa_ext)
15605 fputs (_("None"), file);
15608 fputs ("RMI XLR", file);
15610 case AFL_EXT_OCTEON3:
15611 fputs ("Cavium Networks Octeon3", file);
15613 case AFL_EXT_OCTEON2:
15614 fputs ("Cavium Networks Octeon2", file);
15616 case AFL_EXT_OCTEONP:
15617 fputs ("Cavium Networks OcteonP", file);
15619 case AFL_EXT_LOONGSON_3A:
15620 fputs ("Loongson 3A", file);
15622 case AFL_EXT_OCTEON:
15623 fputs ("Cavium Networks Octeon", file);
15626 fputs ("Toshiba R5900", file);
15629 fputs ("MIPS R4650", file);
15632 fputs ("LSI R4010", file);
15635 fputs ("NEC VR4100", file);
15638 fputs ("Toshiba R3900", file);
15640 case AFL_EXT_10000:
15641 fputs ("MIPS R10000", file);
15644 fputs ("Broadcom SB-1", file);
15647 fputs ("NEC VR4111/VR4181", file);
15650 fputs ("NEC VR4120", file);
15653 fputs ("NEC VR5400", file);
15656 fputs ("NEC VR5500", file);
15658 case AFL_EXT_LOONGSON_2E:
15659 fputs ("ST Microelectronics Loongson 2E", file);
15661 case AFL_EXT_LOONGSON_2F:
15662 fputs ("ST Microelectronics Loongson 2F", file);
15665 fprintf (file, "%s (%d)", _("Unknown"), isa_ext);
15671 print_mips_fp_abi_value (FILE *file, int val)
15675 case Val_GNU_MIPS_ABI_FP_ANY:
15676 fprintf (file, _("Hard or soft float\n"));
15678 case Val_GNU_MIPS_ABI_FP_DOUBLE:
15679 fprintf (file, _("Hard float (double precision)\n"));
15681 case Val_GNU_MIPS_ABI_FP_SINGLE:
15682 fprintf (file, _("Hard float (single precision)\n"));
15684 case Val_GNU_MIPS_ABI_FP_SOFT:
15685 fprintf (file, _("Soft float\n"));
15687 case Val_GNU_MIPS_ABI_FP_OLD_64:
15688 fprintf (file, _("Hard float (MIPS32r2 64-bit FPU 12 callee-saved)\n"));
15690 case Val_GNU_MIPS_ABI_FP_XX:
15691 fprintf (file, _("Hard float (32-bit CPU, Any FPU)\n"));
15693 case Val_GNU_MIPS_ABI_FP_64:
15694 fprintf (file, _("Hard float (32-bit CPU, 64-bit FPU)\n"));
15696 case Val_GNU_MIPS_ABI_FP_64A:
15697 fprintf (file, _("Hard float compat (32-bit CPU, 64-bit FPU)\n"));
15700 fprintf (file, "??? (%d)\n", val);
15706 get_mips_reg_size (int reg_size)
15708 return (reg_size == AFL_REG_NONE) ? 0
15709 : (reg_size == AFL_REG_32) ? 32
15710 : (reg_size == AFL_REG_64) ? 64
15711 : (reg_size == AFL_REG_128) ? 128
15716 _bfd_mips_elf_print_private_bfd_data (bfd *abfd, void *ptr)
15720 BFD_ASSERT (abfd != NULL && ptr != NULL);
15722 /* Print normal ELF private data. */
15723 _bfd_elf_print_private_bfd_data (abfd, ptr);
15725 /* xgettext:c-format */
15726 fprintf (file, _("private flags = %lx:"), elf_elfheader (abfd)->e_flags);
15728 if ((elf_elfheader (abfd)->e_flags & EF_MIPS_ABI) == E_MIPS_ABI_O32)
15729 fprintf (file, _(" [abi=O32]"));
15730 else if ((elf_elfheader (abfd)->e_flags & EF_MIPS_ABI) == E_MIPS_ABI_O64)
15731 fprintf (file, _(" [abi=O64]"));
15732 else if ((elf_elfheader (abfd)->e_flags & EF_MIPS_ABI) == E_MIPS_ABI_EABI32)
15733 fprintf (file, _(" [abi=EABI32]"));
15734 else if ((elf_elfheader (abfd)->e_flags & EF_MIPS_ABI) == E_MIPS_ABI_EABI64)
15735 fprintf (file, _(" [abi=EABI64]"));
15736 else if ((elf_elfheader (abfd)->e_flags & EF_MIPS_ABI))
15737 fprintf (file, _(" [abi unknown]"));
15738 else if (ABI_N32_P (abfd))
15739 fprintf (file, _(" [abi=N32]"));
15740 else if (ABI_64_P (abfd))
15741 fprintf (file, _(" [abi=64]"));
15743 fprintf (file, _(" [no abi set]"));
15745 if ((elf_elfheader (abfd)->e_flags & EF_MIPS_ARCH) == E_MIPS_ARCH_1)
15746 fprintf (file, " [mips1]");
15747 else if ((elf_elfheader (abfd)->e_flags & EF_MIPS_ARCH) == E_MIPS_ARCH_2)
15748 fprintf (file, " [mips2]");
15749 else if ((elf_elfheader (abfd)->e_flags & EF_MIPS_ARCH) == E_MIPS_ARCH_3)
15750 fprintf (file, " [mips3]");
15751 else if ((elf_elfheader (abfd)->e_flags & EF_MIPS_ARCH) == E_MIPS_ARCH_4)
15752 fprintf (file, " [mips4]");
15753 else if ((elf_elfheader (abfd)->e_flags & EF_MIPS_ARCH) == E_MIPS_ARCH_5)
15754 fprintf (file, " [mips5]");
15755 else if ((elf_elfheader (abfd)->e_flags & EF_MIPS_ARCH) == E_MIPS_ARCH_32)
15756 fprintf (file, " [mips32]");
15757 else if ((elf_elfheader (abfd)->e_flags & EF_MIPS_ARCH) == E_MIPS_ARCH_64)
15758 fprintf (file, " [mips64]");
15759 else if ((elf_elfheader (abfd)->e_flags & EF_MIPS_ARCH) == E_MIPS_ARCH_32R2)
15760 fprintf (file, " [mips32r2]");
15761 else if ((elf_elfheader (abfd)->e_flags & EF_MIPS_ARCH) == E_MIPS_ARCH_64R2)
15762 fprintf (file, " [mips64r2]");
15763 else if ((elf_elfheader (abfd)->e_flags & EF_MIPS_ARCH) == E_MIPS_ARCH_32R6)
15764 fprintf (file, " [mips32r6]");
15765 else if ((elf_elfheader (abfd)->e_flags & EF_MIPS_ARCH) == E_MIPS_ARCH_64R6)
15766 fprintf (file, " [mips64r6]");
15768 fprintf (file, _(" [unknown ISA]"));
15770 if (elf_elfheader (abfd)->e_flags & EF_MIPS_ARCH_ASE_MDMX)
15771 fprintf (file, " [mdmx]");
15773 if (elf_elfheader (abfd)->e_flags & EF_MIPS_ARCH_ASE_M16)
15774 fprintf (file, " [mips16]");
15776 if (elf_elfheader (abfd)->e_flags & EF_MIPS_ARCH_ASE_MICROMIPS)
15777 fprintf (file, " [micromips]");
15779 if (elf_elfheader (abfd)->e_flags & EF_MIPS_NAN2008)
15780 fprintf (file, " [nan2008]");
15782 if (elf_elfheader (abfd)->e_flags & EF_MIPS_FP64)
15783 fprintf (file, " [old fp64]");
15785 if (elf_elfheader (abfd)->e_flags & EF_MIPS_32BITMODE)
15786 fprintf (file, " [32bitmode]");
15788 fprintf (file, _(" [not 32bitmode]"));
15790 if (elf_elfheader (abfd)->e_flags & EF_MIPS_NOREORDER)
15791 fprintf (file, " [noreorder]");
15793 if (elf_elfheader (abfd)->e_flags & EF_MIPS_PIC)
15794 fprintf (file, " [PIC]");
15796 if (elf_elfheader (abfd)->e_flags & EF_MIPS_CPIC)
15797 fprintf (file, " [CPIC]");
15799 if (elf_elfheader (abfd)->e_flags & EF_MIPS_XGOT)
15800 fprintf (file, " [XGOT]");
15802 if (elf_elfheader (abfd)->e_flags & EF_MIPS_UCODE)
15803 fprintf (file, " [UCODE]");
15805 fputc ('\n', file);
15807 if (mips_elf_tdata (abfd)->abiflags_valid)
15809 Elf_Internal_ABIFlags_v0 *abiflags = &mips_elf_tdata (abfd)->abiflags;
15810 fprintf (file, "\nMIPS ABI Flags Version: %d\n", abiflags->version);
15811 fprintf (file, "\nISA: MIPS%d", abiflags->isa_level);
15812 if (abiflags->isa_rev > 1)
15813 fprintf (file, "r%d", abiflags->isa_rev);
15814 fprintf (file, "\nGPR size: %d",
15815 get_mips_reg_size (abiflags->gpr_size));
15816 fprintf (file, "\nCPR1 size: %d",
15817 get_mips_reg_size (abiflags->cpr1_size));
15818 fprintf (file, "\nCPR2 size: %d",
15819 get_mips_reg_size (abiflags->cpr2_size));
15820 fputs ("\nFP ABI: ", file);
15821 print_mips_fp_abi_value (file, abiflags->fp_abi);
15822 fputs ("ISA Extension: ", file);
15823 print_mips_isa_ext (file, abiflags->isa_ext);
15824 fputs ("\nASEs:", file);
15825 print_mips_ases (file, abiflags->ases);
15826 fprintf (file, "\nFLAGS 1: %8.8lx", abiflags->flags1);
15827 fprintf (file, "\nFLAGS 2: %8.8lx", abiflags->flags2);
15828 fputc ('\n', file);
15834 const struct bfd_elf_special_section _bfd_mips_elf_special_sections[] =
15836 { STRING_COMMA_LEN (".lit4"), 0, SHT_PROGBITS, SHF_ALLOC + SHF_WRITE + SHF_MIPS_GPREL },
15837 { STRING_COMMA_LEN (".lit8"), 0, SHT_PROGBITS, SHF_ALLOC + SHF_WRITE + SHF_MIPS_GPREL },
15838 { STRING_COMMA_LEN (".mdebug"), 0, SHT_MIPS_DEBUG, 0 },
15839 { STRING_COMMA_LEN (".sbss"), -2, SHT_NOBITS, SHF_ALLOC + SHF_WRITE + SHF_MIPS_GPREL },
15840 { STRING_COMMA_LEN (".sdata"), -2, SHT_PROGBITS, SHF_ALLOC + SHF_WRITE + SHF_MIPS_GPREL },
15841 { STRING_COMMA_LEN (".ucode"), 0, SHT_MIPS_UCODE, 0 },
15842 { NULL, 0, 0, 0, 0 }
15845 /* Merge non visibility st_other attributes. Ensure that the
15846 STO_OPTIONAL flag is copied into h->other, even if this is not a
15847 definiton of the symbol. */
15849 _bfd_mips_elf_merge_symbol_attribute (struct elf_link_hash_entry *h,
15850 const Elf_Internal_Sym *isym,
15851 bfd_boolean definition,
15852 bfd_boolean dynamic ATTRIBUTE_UNUSED)
15854 if ((isym->st_other & ~ELF_ST_VISIBILITY (-1)) != 0)
15856 unsigned char other;
15858 other = (definition ? isym->st_other : h->other);
15859 other &= ~ELF_ST_VISIBILITY (-1);
15860 h->other = other | ELF_ST_VISIBILITY (h->other);
15864 && ELF_MIPS_IS_OPTIONAL (isym->st_other))
15865 h->other |= STO_OPTIONAL;
15868 /* Decide whether an undefined symbol is special and can be ignored.
15869 This is the case for OPTIONAL symbols on IRIX. */
15871 _bfd_mips_elf_ignore_undef_symbol (struct elf_link_hash_entry *h)
15873 return ELF_MIPS_IS_OPTIONAL (h->other) ? TRUE : FALSE;
15877 _bfd_mips_elf_common_definition (Elf_Internal_Sym *sym)
15879 return (sym->st_shndx == SHN_COMMON
15880 || sym->st_shndx == SHN_MIPS_ACOMMON
15881 || sym->st_shndx == SHN_MIPS_SCOMMON);
15884 /* Return address for Ith PLT stub in section PLT, for relocation REL
15885 or (bfd_vma) -1 if it should not be included. */
15888 _bfd_mips_elf_plt_sym_val (bfd_vma i, const asection *plt,
15889 const arelent *rel ATTRIBUTE_UNUSED)
15892 + 4 * ARRAY_SIZE (mips_o32_exec_plt0_entry)
15893 + i * 4 * ARRAY_SIZE (mips_exec_plt_entry));
15896 /* Build a table of synthetic symbols to represent the PLT. As with MIPS16
15897 and microMIPS PLT slots we may have a many-to-one mapping between .plt
15898 and .got.plt and also the slots may be of a different size each we walk
15899 the PLT manually fetching instructions and matching them against known
15900 patterns. To make things easier standard MIPS slots, if any, always come
15901 first. As we don't create proper ELF symbols we use the UDATA.I member
15902 of ASYMBOL to carry ISA annotation. The encoding used is the same as
15903 with the ST_OTHER member of the ELF symbol. */
15906 _bfd_mips_elf_get_synthetic_symtab (bfd *abfd,
15907 long symcount ATTRIBUTE_UNUSED,
15908 asymbol **syms ATTRIBUTE_UNUSED,
15909 long dynsymcount, asymbol **dynsyms,
15912 static const char pltname[] = "_PROCEDURE_LINKAGE_TABLE_";
15913 static const char microsuffix[] = "@micromipsplt";
15914 static const char m16suffix[] = "@mips16plt";
15915 static const char mipssuffix[] = "@plt";
15917 bfd_boolean (*slurp_relocs) (bfd *, asection *, asymbol **, bfd_boolean);
15918 const struct elf_backend_data *bed = get_elf_backend_data (abfd);
15919 bfd_boolean micromips_p = MICROMIPS_P (abfd);
15920 Elf_Internal_Shdr *hdr;
15921 bfd_byte *plt_data;
15922 bfd_vma plt_offset;
15923 unsigned int other;
15924 bfd_vma entry_size;
15943 if ((abfd->flags & (DYNAMIC | EXEC_P)) == 0 || dynsymcount <= 0)
15946 relplt = bfd_get_section_by_name (abfd, ".rel.plt");
15947 if (relplt == NULL)
15950 hdr = &elf_section_data (relplt)->this_hdr;
15951 if (hdr->sh_link != elf_dynsymtab (abfd) || hdr->sh_type != SHT_REL)
15954 plt = bfd_get_section_by_name (abfd, ".plt");
15958 slurp_relocs = get_elf_backend_data (abfd)->s->slurp_reloc_table;
15959 if (!(*slurp_relocs) (abfd, relplt, dynsyms, TRUE))
15961 p = relplt->relocation;
15963 /* Calculating the exact amount of space required for symbols would
15964 require two passes over the PLT, so just pessimise assuming two
15965 PLT slots per relocation. */
15966 count = relplt->size / hdr->sh_entsize;
15967 counti = count * bed->s->int_rels_per_ext_rel;
15968 size = 2 * count * sizeof (asymbol);
15969 size += count * (sizeof (mipssuffix) +
15970 (micromips_p ? sizeof (microsuffix) : sizeof (m16suffix)));
15971 for (pi = 0; pi < counti; pi += bed->s->int_rels_per_ext_rel)
15972 size += 2 * strlen ((*p[pi].sym_ptr_ptr)->name);
15974 /* Add the size of "_PROCEDURE_LINKAGE_TABLE_" too. */
15975 size += sizeof (asymbol) + sizeof (pltname);
15977 if (!bfd_malloc_and_get_section (abfd, plt, &plt_data))
15980 if (plt->size < 16)
15983 s = *ret = bfd_malloc (size);
15986 send = s + 2 * count + 1;
15988 names = (char *) send;
15989 nend = (char *) s + size;
15992 opcode = bfd_get_micromips_32 (abfd, plt_data + 12);
15993 if (opcode == 0x3302fffe)
15997 plt0_size = 2 * ARRAY_SIZE (micromips_o32_exec_plt0_entry);
15998 other = STO_MICROMIPS;
16000 else if (opcode == 0x0398c1d0)
16004 plt0_size = 2 * ARRAY_SIZE (micromips_insn32_o32_exec_plt0_entry);
16005 other = STO_MICROMIPS;
16009 plt0_size = 4 * ARRAY_SIZE (mips_o32_exec_plt0_entry);
16014 s->flags = BSF_SYNTHETIC | BSF_FUNCTION | BSF_LOCAL;
16018 s->udata.i = other;
16019 memcpy (names, pltname, sizeof (pltname));
16020 names += sizeof (pltname);
16024 for (plt_offset = plt0_size;
16025 plt_offset + 8 <= plt->size && s < send;
16026 plt_offset += entry_size)
16028 bfd_vma gotplt_addr;
16029 const char *suffix;
16034 opcode = bfd_get_micromips_32 (abfd, plt_data + plt_offset + 4);
16036 /* Check if the second word matches the expected MIPS16 instruction. */
16037 if (opcode == 0x651aeb00)
16041 /* Truncated table??? */
16042 if (plt_offset + 16 > plt->size)
16044 gotplt_addr = bfd_get_32 (abfd, plt_data + plt_offset + 12);
16045 entry_size = 2 * ARRAY_SIZE (mips16_o32_exec_plt_entry);
16046 suffixlen = sizeof (m16suffix);
16047 suffix = m16suffix;
16048 other = STO_MIPS16;
16050 /* Likewise the expected microMIPS instruction (no insn32 mode). */
16051 else if (opcode == 0xff220000)
16055 gotplt_hi = bfd_get_16 (abfd, plt_data + plt_offset) & 0x7f;
16056 gotplt_lo = bfd_get_16 (abfd, plt_data + plt_offset + 2) & 0xffff;
16057 gotplt_hi = ((gotplt_hi ^ 0x40) - 0x40) << 18;
16059 gotplt_addr = gotplt_hi + gotplt_lo;
16060 gotplt_addr += ((plt->vma + plt_offset) | 3) ^ 3;
16061 entry_size = 2 * ARRAY_SIZE (micromips_o32_exec_plt_entry);
16062 suffixlen = sizeof (microsuffix);
16063 suffix = microsuffix;
16064 other = STO_MICROMIPS;
16066 /* Likewise the expected microMIPS instruction (insn32 mode). */
16067 else if ((opcode & 0xffff0000) == 0xff2f0000)
16069 gotplt_hi = bfd_get_16 (abfd, plt_data + plt_offset + 2) & 0xffff;
16070 gotplt_lo = bfd_get_16 (abfd, plt_data + plt_offset + 6) & 0xffff;
16071 gotplt_hi = ((gotplt_hi ^ 0x8000) - 0x8000) << 16;
16072 gotplt_lo = (gotplt_lo ^ 0x8000) - 0x8000;
16073 gotplt_addr = gotplt_hi + gotplt_lo;
16074 entry_size = 2 * ARRAY_SIZE (micromips_insn32_o32_exec_plt_entry);
16075 suffixlen = sizeof (microsuffix);
16076 suffix = microsuffix;
16077 other = STO_MICROMIPS;
16079 /* Otherwise assume standard MIPS code. */
16082 gotplt_hi = bfd_get_32 (abfd, plt_data + plt_offset) & 0xffff;
16083 gotplt_lo = bfd_get_32 (abfd, plt_data + plt_offset + 4) & 0xffff;
16084 gotplt_hi = ((gotplt_hi ^ 0x8000) - 0x8000) << 16;
16085 gotplt_lo = (gotplt_lo ^ 0x8000) - 0x8000;
16086 gotplt_addr = gotplt_hi + gotplt_lo;
16087 entry_size = 4 * ARRAY_SIZE (mips_exec_plt_entry);
16088 suffixlen = sizeof (mipssuffix);
16089 suffix = mipssuffix;
16092 /* Truncated table??? */
16093 if (plt_offset + entry_size > plt->size)
16097 i < count && p[pi].address != gotplt_addr;
16098 i++, pi = (pi + bed->s->int_rels_per_ext_rel) % counti);
16105 *s = **p[pi].sym_ptr_ptr;
16106 /* Undefined syms won't have BSF_LOCAL or BSF_GLOBAL set. Since
16107 we are defining a symbol, ensure one of them is set. */
16108 if ((s->flags & BSF_LOCAL) == 0)
16109 s->flags |= BSF_GLOBAL;
16110 s->flags |= BSF_SYNTHETIC;
16112 s->value = plt_offset;
16114 s->udata.i = other;
16116 len = strlen ((*p[pi].sym_ptr_ptr)->name);
16117 namelen = len + suffixlen;
16118 if (names + namelen > nend)
16121 memcpy (names, (*p[pi].sym_ptr_ptr)->name, len);
16123 memcpy (names, suffix, suffixlen);
16124 names += suffixlen;
16127 pi = (pi + bed->s->int_rels_per_ext_rel) % counti;
16137 _bfd_mips_post_process_headers (bfd *abfd, struct bfd_link_info *link_info)
16139 struct mips_elf_link_hash_table *htab;
16140 Elf_Internal_Ehdr *i_ehdrp;
16142 i_ehdrp = elf_elfheader (abfd);
16145 htab = mips_elf_hash_table (link_info);
16146 BFD_ASSERT (htab != NULL);
16148 if (htab->use_plts_and_copy_relocs && !htab->is_vxworks)
16149 i_ehdrp->e_ident[EI_ABIVERSION] = 1;
16152 _bfd_elf_post_process_headers (abfd, link_info);
16154 if (mips_elf_tdata (abfd)->abiflags.fp_abi == Val_GNU_MIPS_ABI_FP_64
16155 || mips_elf_tdata (abfd)->abiflags.fp_abi == Val_GNU_MIPS_ABI_FP_64A)
16156 i_ehdrp->e_ident[EI_ABIVERSION] = 3;
16158 if (elf_stack_flags (abfd) && !(elf_stack_flags (abfd) & PF_X))
16159 i_ehdrp->e_ident[EI_ABIVERSION] = 5;
16163 _bfd_mips_elf_compact_eh_encoding (struct bfd_link_info *link_info ATTRIBUTE_UNUSED)
16165 return DW_EH_PE_pcrel | DW_EH_PE_sdata4;
16168 /* Return the opcode for can't unwind. */
16171 _bfd_mips_elf_cant_unwind_opcode (struct bfd_link_info *link_info ATTRIBUTE_UNUSED)
16173 return COMPACT_EH_CANT_UNWIND_OPCODE;