1 /* Matsushita 10300 specific support for 32-bit ELF
2 Copyright 1996, 1997, 1998, 1999, 2000, 2001, 2002, 2003, 2004, 2005
3 Free Software Foundation, Inc.
5 This file is part of BFD, the Binary File Descriptor library.
7 This program is free software; you can redistribute it and/or modify
8 it under the terms of the GNU General Public License as published by
9 the Free Software Foundation; either version 2 of the License, or
10 (at your option) any later version.
12 This program is distributed in the hope that it will be useful,
13 but WITHOUT ANY WARRANTY; without even the implied warranty of
14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 GNU General Public License for more details.
17 You should have received a copy of the GNU General Public License
18 along with this program; if not, write to the Free Software
19 Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston, MA 02110-1301, USA. */
25 #include "elf/mn10300.h"
27 static bfd_reloc_status_type mn10300_elf_final_link_relocate
28 PARAMS ((reloc_howto_type *, bfd *, bfd *, asection *, bfd_byte *,
29 bfd_vma, bfd_vma, bfd_vma,
30 struct elf_link_hash_entry *, unsigned long, struct bfd_link_info *,
32 static bfd_boolean mn10300_elf_relocate_section
33 PARAMS ((bfd *, struct bfd_link_info *, bfd *, asection *, bfd_byte *,
34 Elf_Internal_Rela *, Elf_Internal_Sym *, asection **));
35 static bfd_boolean mn10300_elf_relax_section
36 PARAMS ((bfd *, asection *, struct bfd_link_info *, bfd_boolean *));
37 static bfd_byte * mn10300_elf_get_relocated_section_contents
38 PARAMS ((bfd *, struct bfd_link_info *, struct bfd_link_order *,
39 bfd_byte *, bfd_boolean, asymbol **));
40 static unsigned long elf_mn10300_mach
42 void _bfd_mn10300_elf_final_write_processing
43 PARAMS ((bfd *, bfd_boolean));
44 bfd_boolean _bfd_mn10300_elf_object_p
46 bfd_boolean _bfd_mn10300_elf_merge_private_bfd_data
47 PARAMS ((bfd *,bfd *));
49 /* The mn10300 linker needs to keep track of the number of relocs that
50 it decides to copy in check_relocs for each symbol. This is so
51 that it can discard PC relative relocs if it doesn't need them when
52 linking with -Bsymbolic. We store the information in a field
53 extending the regular ELF linker hash table. */
55 struct elf32_mn10300_link_hash_entry {
56 /* The basic elf link hash table entry. */
57 struct elf_link_hash_entry root;
59 /* For function symbols, the number of times this function is
60 called directly (ie by name). */
61 unsigned int direct_calls;
63 /* For function symbols, the size of this function's stack
64 (if <= 255 bytes). We stuff this into "call" instructions
65 to this target when it's valid and profitable to do so.
67 This does not include stack allocated by movm! */
68 unsigned char stack_size;
70 /* For function symbols, arguments (if any) for movm instruction
71 in the prologue. We stuff this value into "call" instructions
72 to the target when it's valid and profitable to do so. */
73 unsigned char movm_args;
75 /* For function symbols, the amount of stack space that would be allocated
76 by the movm instruction. This is redundant with movm_args, but we
77 add it to the hash table to avoid computing it over and over. */
78 unsigned char movm_stack_size;
80 /* When set, convert all "call" instructions to this target into "calls"
82 #define MN10300_CONVERT_CALL_TO_CALLS 0x1
84 /* Used to mark functions which have had redundant parts of their
86 #define MN10300_DELETED_PROLOGUE_BYTES 0x2
90 /* We derive a hash table from the main elf linker hash table so
91 we can store state variables and a secondary hash table without
92 resorting to global variables. */
93 struct elf32_mn10300_link_hash_table {
94 /* The main hash table. */
95 struct elf_link_hash_table root;
97 /* A hash table for static functions. We could derive a new hash table
98 instead of using the full elf32_mn10300_link_hash_table if we wanted
99 to save some memory. */
100 struct elf32_mn10300_link_hash_table *static_hash_table;
102 /* Random linker state flags. */
103 #define MN10300_HASH_ENTRIES_INITIALIZED 0x1
107 /* For MN10300 linker hash table. */
109 /* Get the MN10300 ELF linker hash table from a link_info structure. */
111 #define elf32_mn10300_hash_table(p) \
112 ((struct elf32_mn10300_link_hash_table *) ((p)->hash))
114 #define elf32_mn10300_link_hash_traverse(table, func, info) \
115 (elf_link_hash_traverse \
117 (bfd_boolean (*) PARAMS ((struct elf_link_hash_entry *, PTR))) (func), \
120 static struct bfd_hash_entry *elf32_mn10300_link_hash_newfunc
121 PARAMS ((struct bfd_hash_entry *, struct bfd_hash_table *, const char *));
122 static struct bfd_link_hash_table *elf32_mn10300_link_hash_table_create
124 static void elf32_mn10300_link_hash_table_free
125 PARAMS ((struct bfd_link_hash_table *));
127 static reloc_howto_type *bfd_elf32_bfd_reloc_type_lookup
128 PARAMS ((bfd *abfd, bfd_reloc_code_real_type code));
129 static void mn10300_info_to_howto
130 PARAMS ((bfd *, arelent *, Elf_Internal_Rela *));
131 static bfd_boolean mn10300_elf_check_relocs
132 PARAMS ((bfd *, struct bfd_link_info *, asection *,
133 const Elf_Internal_Rela *));
134 static asection *mn10300_elf_gc_mark_hook
135 PARAMS ((asection *, struct bfd_link_info *info, Elf_Internal_Rela *,
136 struct elf_link_hash_entry *, Elf_Internal_Sym *));
137 static bfd_boolean mn10300_elf_relax_delete_bytes
138 PARAMS ((bfd *, asection *, bfd_vma, int));
139 static bfd_boolean mn10300_elf_symbol_address_p
140 PARAMS ((bfd *, asection *, Elf_Internal_Sym *, bfd_vma));
141 static bfd_boolean elf32_mn10300_finish_hash_table_entry
142 PARAMS ((struct bfd_hash_entry *, PTR));
143 static void compute_function_info
144 PARAMS ((bfd *, struct elf32_mn10300_link_hash_entry *,
145 bfd_vma, unsigned char *));
147 static bfd_boolean _bfd_mn10300_elf_create_got_section
148 PARAMS ((bfd *, struct bfd_link_info *));
149 static bfd_boolean _bfd_mn10300_elf_create_dynamic_sections
150 PARAMS ((bfd *, struct bfd_link_info *));
151 static bfd_boolean _bfd_mn10300_elf_adjust_dynamic_symbol
152 PARAMS ((struct bfd_link_info *, struct elf_link_hash_entry *));
153 static bfd_boolean _bfd_mn10300_elf_size_dynamic_sections
154 PARAMS ((bfd *, struct bfd_link_info *));
155 static bfd_boolean _bfd_mn10300_elf_finish_dynamic_symbol
156 PARAMS ((bfd *, struct bfd_link_info *, struct elf_link_hash_entry *,
157 Elf_Internal_Sym *));
158 static bfd_boolean _bfd_mn10300_elf_finish_dynamic_sections
159 PARAMS ((bfd *, struct bfd_link_info *));
161 static reloc_howto_type elf_mn10300_howto_table[] = {
162 /* Dummy relocation. Does nothing. */
163 HOWTO (R_MN10300_NONE,
169 complain_overflow_bitfield,
170 bfd_elf_generic_reloc,
176 /* Standard 32 bit reloc. */
183 complain_overflow_bitfield,
184 bfd_elf_generic_reloc,
190 /* Standard 16 bit reloc. */
197 complain_overflow_bitfield,
198 bfd_elf_generic_reloc,
204 /* Standard 8 bit reloc. */
211 complain_overflow_bitfield,
212 bfd_elf_generic_reloc,
218 /* Standard 32bit pc-relative reloc. */
219 HOWTO (R_MN10300_PCREL32,
225 complain_overflow_bitfield,
226 bfd_elf_generic_reloc,
232 /* Standard 16bit pc-relative reloc. */
233 HOWTO (R_MN10300_PCREL16,
239 complain_overflow_bitfield,
240 bfd_elf_generic_reloc,
246 /* Standard 8 pc-relative reloc. */
247 HOWTO (R_MN10300_PCREL8,
253 complain_overflow_bitfield,
254 bfd_elf_generic_reloc,
261 /* GNU extension to record C++ vtable hierarchy */
262 HOWTO (R_MN10300_GNU_VTINHERIT, /* type */
264 0, /* size (0 = byte, 1 = short, 2 = long) */
266 FALSE, /* pc_relative */
268 complain_overflow_dont, /* complain_on_overflow */
269 NULL, /* special_function */
270 "R_MN10300_GNU_VTINHERIT", /* name */
271 FALSE, /* partial_inplace */
274 FALSE), /* pcrel_offset */
276 /* GNU extension to record C++ vtable member usage */
277 HOWTO (R_MN10300_GNU_VTENTRY, /* type */
279 0, /* size (0 = byte, 1 = short, 2 = long) */
281 FALSE, /* pc_relative */
283 complain_overflow_dont, /* complain_on_overflow */
284 NULL, /* special_function */
285 "R_MN10300_GNU_VTENTRY", /* name */
286 FALSE, /* partial_inplace */
289 FALSE), /* pcrel_offset */
291 /* Standard 24 bit reloc. */
298 complain_overflow_bitfield,
299 bfd_elf_generic_reloc,
305 HOWTO (R_MN10300_GOTPC32, /* type */
307 2, /* size (0 = byte, 1 = short, 2 = long) */
309 TRUE, /* pc_relative */
311 complain_overflow_bitfield, /* complain_on_overflow */
312 bfd_elf_generic_reloc, /* */
313 "R_MN10300_GOTPC32", /* name */
314 FALSE, /* partial_inplace */
315 0xffffffff, /* src_mask */
316 0xffffffff, /* dst_mask */
317 TRUE), /* pcrel_offset */
319 HOWTO (R_MN10300_GOTPC16, /* type */
321 1, /* size (0 = byte, 1 = short, 2 = long) */
323 TRUE, /* pc_relative */
325 complain_overflow_bitfield, /* complain_on_overflow */
326 bfd_elf_generic_reloc, /* */
327 "R_MN10300_GOTPC16", /* name */
328 FALSE, /* partial_inplace */
329 0xffff, /* src_mask */
330 0xffff, /* dst_mask */
331 TRUE), /* pcrel_offset */
333 HOWTO (R_MN10300_GOTOFF32, /* type */
335 2, /* size (0 = byte, 1 = short, 2 = long) */
337 FALSE, /* pc_relative */
339 complain_overflow_bitfield, /* complain_on_overflow */
340 bfd_elf_generic_reloc, /* */
341 "R_MN10300_GOTOFF32", /* name */
342 FALSE, /* partial_inplace */
343 0xffffffff, /* src_mask */
344 0xffffffff, /* dst_mask */
345 FALSE), /* pcrel_offset */
347 HOWTO (R_MN10300_GOTOFF24, /* type */
349 2, /* size (0 = byte, 1 = short, 2 = long) */
351 FALSE, /* pc_relative */
353 complain_overflow_bitfield, /* complain_on_overflow */
354 bfd_elf_generic_reloc, /* */
355 "R_MN10300_GOTOFF24", /* name */
356 FALSE, /* partial_inplace */
357 0xffffff, /* src_mask */
358 0xffffff, /* dst_mask */
359 FALSE), /* pcrel_offset */
361 HOWTO (R_MN10300_GOTOFF16, /* type */
363 1, /* size (0 = byte, 1 = short, 2 = long) */
365 FALSE, /* pc_relative */
367 complain_overflow_bitfield, /* complain_on_overflow */
368 bfd_elf_generic_reloc, /* */
369 "R_MN10300_GOTOFF16", /* name */
370 FALSE, /* partial_inplace */
371 0xffff, /* src_mask */
372 0xffff, /* dst_mask */
373 FALSE), /* pcrel_offset */
375 HOWTO (R_MN10300_PLT32, /* type */
377 2, /* size (0 = byte, 1 = short, 2 = long) */
379 TRUE, /* pc_relative */
381 complain_overflow_bitfield, /* complain_on_overflow */
382 bfd_elf_generic_reloc, /* */
383 "R_MN10300_PLT32", /* name */
384 FALSE, /* partial_inplace */
385 0xffffffff, /* src_mask */
386 0xffffffff, /* dst_mask */
387 TRUE), /* pcrel_offset */
389 HOWTO (R_MN10300_PLT16, /* type */
391 1, /* size (0 = byte, 1 = short, 2 = long) */
393 TRUE, /* pc_relative */
395 complain_overflow_bitfield, /* complain_on_overflow */
396 bfd_elf_generic_reloc, /* */
397 "R_MN10300_PLT16", /* name */
398 FALSE, /* partial_inplace */
399 0xffff, /* src_mask */
400 0xffff, /* dst_mask */
401 TRUE), /* pcrel_offset */
403 HOWTO (R_MN10300_GOT32, /* type */
405 2, /* size (0 = byte, 1 = short, 2 = long) */
407 FALSE, /* pc_relative */
409 complain_overflow_bitfield, /* complain_on_overflow */
410 bfd_elf_generic_reloc, /* */
411 "R_MN10300_GOT32", /* name */
412 FALSE, /* partial_inplace */
413 0xffffffff, /* src_mask */
414 0xffffffff, /* dst_mask */
415 FALSE), /* pcrel_offset */
417 HOWTO (R_MN10300_GOT24, /* type */
419 2, /* size (0 = byte, 1 = short, 2 = long) */
421 FALSE, /* pc_relative */
423 complain_overflow_bitfield, /* complain_on_overflow */
424 bfd_elf_generic_reloc, /* */
425 "R_MN10300_GOT24", /* name */
426 FALSE, /* partial_inplace */
427 0xffffffff, /* src_mask */
428 0xffffffff, /* dst_mask */
429 FALSE), /* pcrel_offset */
431 HOWTO (R_MN10300_GOT16, /* type */
433 1, /* size (0 = byte, 1 = short, 2 = long) */
435 FALSE, /* pc_relative */
437 complain_overflow_bitfield, /* complain_on_overflow */
438 bfd_elf_generic_reloc, /* */
439 "R_MN10300_GOT16", /* name */
440 FALSE, /* partial_inplace */
441 0xffffffff, /* src_mask */
442 0xffffffff, /* dst_mask */
443 FALSE), /* pcrel_offset */
445 HOWTO (R_MN10300_COPY, /* type */
447 2, /* size (0 = byte, 1 = short, 2 = long) */
449 FALSE, /* pc_relative */
451 complain_overflow_bitfield, /* complain_on_overflow */
452 bfd_elf_generic_reloc, /* */
453 "R_MN10300_COPY", /* name */
454 FALSE, /* partial_inplace */
455 0xffffffff, /* src_mask */
456 0xffffffff, /* dst_mask */
457 FALSE), /* pcrel_offset */
459 HOWTO (R_MN10300_GLOB_DAT, /* type */
461 2, /* size (0 = byte, 1 = short, 2 = long) */
463 FALSE, /* pc_relative */
465 complain_overflow_bitfield, /* complain_on_overflow */
466 bfd_elf_generic_reloc, /* */
467 "R_MN10300_GLOB_DAT", /* name */
468 FALSE, /* partial_inplace */
469 0xffffffff, /* src_mask */
470 0xffffffff, /* dst_mask */
471 FALSE), /* pcrel_offset */
473 HOWTO (R_MN10300_JMP_SLOT, /* type */
475 2, /* size (0 = byte, 1 = short, 2 = long) */
477 FALSE, /* pc_relative */
479 complain_overflow_bitfield, /* complain_on_overflow */
480 bfd_elf_generic_reloc, /* */
481 "R_MN10300_JMP_SLOT", /* name */
482 FALSE, /* partial_inplace */
483 0xffffffff, /* src_mask */
484 0xffffffff, /* dst_mask */
485 FALSE), /* pcrel_offset */
487 HOWTO (R_MN10300_RELATIVE, /* type */
489 2, /* size (0 = byte, 1 = short, 2 = long) */
491 FALSE, /* pc_relative */
493 complain_overflow_bitfield, /* complain_on_overflow */
494 bfd_elf_generic_reloc, /* */
495 "R_MN10300_RELATIVE", /* name */
496 FALSE, /* partial_inplace */
497 0xffffffff, /* src_mask */
498 0xffffffff, /* dst_mask */
499 FALSE), /* pcrel_offset */
503 struct mn10300_reloc_map {
504 bfd_reloc_code_real_type bfd_reloc_val;
505 unsigned char elf_reloc_val;
508 static const struct mn10300_reloc_map mn10300_reloc_map[] = {
509 { BFD_RELOC_NONE, R_MN10300_NONE, },
510 { BFD_RELOC_32, R_MN10300_32, },
511 { BFD_RELOC_16, R_MN10300_16, },
512 { BFD_RELOC_8, R_MN10300_8, },
513 { BFD_RELOC_32_PCREL, R_MN10300_PCREL32, },
514 { BFD_RELOC_16_PCREL, R_MN10300_PCREL16, },
515 { BFD_RELOC_8_PCREL, R_MN10300_PCREL8, },
516 { BFD_RELOC_24, R_MN10300_24, },
517 { BFD_RELOC_VTABLE_INHERIT, R_MN10300_GNU_VTINHERIT },
518 { BFD_RELOC_VTABLE_ENTRY, R_MN10300_GNU_VTENTRY },
519 { BFD_RELOC_32_GOT_PCREL, R_MN10300_GOTPC32 },
520 { BFD_RELOC_16_GOT_PCREL, R_MN10300_GOTPC16 },
521 { BFD_RELOC_32_GOTOFF, R_MN10300_GOTOFF32 },
522 { BFD_RELOC_MN10300_GOTOFF24, R_MN10300_GOTOFF24 },
523 { BFD_RELOC_16_GOTOFF, R_MN10300_GOTOFF16 },
524 { BFD_RELOC_32_PLT_PCREL, R_MN10300_PLT32 },
525 { BFD_RELOC_16_PLT_PCREL, R_MN10300_PLT16 },
526 { BFD_RELOC_MN10300_GOT32, R_MN10300_GOT32 },
527 { BFD_RELOC_MN10300_GOT24, R_MN10300_GOT24 },
528 { BFD_RELOC_MN10300_GOT16, R_MN10300_GOT16 },
529 { BFD_RELOC_MN10300_COPY, R_MN10300_COPY },
530 { BFD_RELOC_MN10300_GLOB_DAT, R_MN10300_GLOB_DAT },
531 { BFD_RELOC_MN10300_JMP_SLOT, R_MN10300_JMP_SLOT },
532 { BFD_RELOC_MN10300_RELATIVE, R_MN10300_RELATIVE },
535 /* Create the GOT section. */
538 _bfd_mn10300_elf_create_got_section (abfd, info)
540 struct bfd_link_info * info;
545 struct elf_link_hash_entry * h;
546 const struct elf_backend_data * bed = get_elf_backend_data (abfd);
549 /* This function may be called more than once. */
550 if (bfd_get_section_by_name (abfd, ".got") != NULL)
553 switch (bed->s->arch_size)
564 bfd_set_error (bfd_error_bad_value);
568 flags = (SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS | SEC_IN_MEMORY
569 | SEC_LINKER_CREATED);
572 pltflags |= SEC_CODE;
573 if (bed->plt_not_loaded)
574 pltflags &= ~ (SEC_LOAD | SEC_HAS_CONTENTS);
575 if (bed->plt_readonly)
576 pltflags |= SEC_READONLY;
578 s = bfd_make_section_with_flags (abfd, ".plt", pltflags);
580 || ! bfd_set_section_alignment (abfd, s, bed->plt_alignment))
583 /* Define the symbol _PROCEDURE_LINKAGE_TABLE_ at the start of the
585 if (bed->want_plt_sym
586 && !_bfd_elf_define_linkage_sym (abfd, info, s,
587 "_PROCEDURE_LINKAGE_TABLE_"))
590 s = bfd_make_section_with_flags (abfd, ".got", flags);
592 || ! bfd_set_section_alignment (abfd, s, ptralign))
595 if (bed->want_got_plt)
597 s = bfd_make_section_with_flags (abfd, ".got.plt", flags);
599 || ! bfd_set_section_alignment (abfd, s, ptralign))
603 /* Define the symbol _GLOBAL_OFFSET_TABLE_ at the start of the .got
604 (or .got.plt) section. We don't do this in the linker script
605 because we don't want to define the symbol if we are not creating
606 a global offset table. */
607 h = _bfd_elf_define_linkage_sym (abfd, info, s, "_GLOBAL_OFFSET_TABLE_");
608 elf_hash_table (info)->hgot = h;
612 /* The first bit of the global offset table is the header. */
613 s->size += bed->got_header_size;
618 static reloc_howto_type *
619 bfd_elf32_bfd_reloc_type_lookup (abfd, code)
620 bfd *abfd ATTRIBUTE_UNUSED;
621 bfd_reloc_code_real_type code;
626 i < sizeof (mn10300_reloc_map) / sizeof (struct mn10300_reloc_map);
629 if (mn10300_reloc_map[i].bfd_reloc_val == code)
630 return &elf_mn10300_howto_table[mn10300_reloc_map[i].elf_reloc_val];
636 /* Set the howto pointer for an MN10300 ELF reloc. */
639 mn10300_info_to_howto (abfd, cache_ptr, dst)
640 bfd *abfd ATTRIBUTE_UNUSED;
642 Elf_Internal_Rela *dst;
646 r_type = ELF32_R_TYPE (dst->r_info);
647 BFD_ASSERT (r_type < (unsigned int) R_MN10300_MAX);
648 cache_ptr->howto = &elf_mn10300_howto_table[r_type];
651 /* Look through the relocs for a section during the first phase.
652 Since we don't do .gots or .plts, we just need to consider the
653 virtual table relocs for gc. */
656 mn10300_elf_check_relocs (abfd, info, sec, relocs)
658 struct bfd_link_info *info;
660 const Elf_Internal_Rela *relocs;
662 Elf_Internal_Shdr *symtab_hdr;
663 struct elf_link_hash_entry **sym_hashes, **sym_hashes_end;
664 const Elf_Internal_Rela *rel;
665 const Elf_Internal_Rela *rel_end;
667 bfd_vma * local_got_offsets;
676 if (info->relocatable)
679 symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
680 sym_hashes = elf_sym_hashes (abfd);
681 sym_hashes_end = sym_hashes + symtab_hdr->sh_size/sizeof (Elf32_External_Sym);
682 if (!elf_bad_symtab (abfd))
683 sym_hashes_end -= symtab_hdr->sh_info;
685 dynobj = elf_hash_table (info)->dynobj;
686 local_got_offsets = elf_local_got_offsets (abfd);
687 rel_end = relocs + sec->reloc_count;
688 for (rel = relocs; rel < rel_end; rel++)
690 struct elf_link_hash_entry *h;
691 unsigned long r_symndx;
693 r_symndx = ELF32_R_SYM (rel->r_info);
694 if (r_symndx < symtab_hdr->sh_info)
698 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
699 while (h->root.type == bfd_link_hash_indirect
700 || h->root.type == bfd_link_hash_warning)
701 h = (struct elf_link_hash_entry *) h->root.u.i.link;
704 /* Some relocs require a global offset table. */
707 switch (ELF32_R_TYPE (rel->r_info))
709 case R_MN10300_GOT32:
710 case R_MN10300_GOT24:
711 case R_MN10300_GOT16:
712 case R_MN10300_GOTOFF32:
713 case R_MN10300_GOTOFF24:
714 case R_MN10300_GOTOFF16:
715 case R_MN10300_GOTPC32:
716 case R_MN10300_GOTPC16:
717 elf_hash_table (info)->dynobj = dynobj = abfd;
718 if (! _bfd_mn10300_elf_create_got_section (dynobj, info))
727 switch (ELF32_R_TYPE (rel->r_info))
729 /* This relocation describes the C++ object vtable hierarchy.
730 Reconstruct it for later use during GC. */
731 case R_MN10300_GNU_VTINHERIT:
732 if (!bfd_elf_gc_record_vtinherit (abfd, sec, h, rel->r_offset))
736 /* This relocation describes which C++ vtable entries are actually
737 used. Record for later use during GC. */
738 case R_MN10300_GNU_VTENTRY:
739 if (!bfd_elf_gc_record_vtentry (abfd, sec, h, rel->r_addend))
742 case R_MN10300_GOT32:
743 case R_MN10300_GOT24:
744 case R_MN10300_GOT16:
745 /* This symbol requires a global offset table entry. */
749 sgot = bfd_get_section_by_name (dynobj, ".got");
750 BFD_ASSERT (sgot != NULL);
754 && (h != NULL || info->shared))
756 srelgot = bfd_get_section_by_name (dynobj, ".rela.got");
759 srelgot = bfd_make_section_with_flags (dynobj,
768 || ! bfd_set_section_alignment (dynobj, srelgot, 2))
775 if (h->got.offset != (bfd_vma) -1)
776 /* We have already allocated space in the .got. */
779 h->got.offset = sgot->size;
781 /* Make sure this symbol is output as a dynamic symbol. */
782 if (h->dynindx == -1)
784 if (! bfd_elf_link_record_dynamic_symbol (info, h))
788 srelgot->size += sizeof (Elf32_External_Rela);
792 /* This is a global offset table entry for a local
794 if (local_got_offsets == NULL)
799 size = symtab_hdr->sh_info * sizeof (bfd_vma);
800 local_got_offsets = (bfd_vma *) bfd_alloc (abfd, size);
802 if (local_got_offsets == NULL)
804 elf_local_got_offsets (abfd) = local_got_offsets;
806 for (i = 0; i < symtab_hdr->sh_info; i++)
807 local_got_offsets[i] = (bfd_vma) -1;
810 if (local_got_offsets[r_symndx] != (bfd_vma) -1)
811 /* We have already allocated space in the .got. */
814 local_got_offsets[r_symndx] = sgot->size;
817 /* If we are generating a shared object, we need to
818 output a R_MN10300_RELATIVE reloc so that the dynamic
819 linker can adjust this GOT entry. */
820 srelgot->size += sizeof (Elf32_External_Rela);
827 case R_MN10300_PLT32:
828 case R_MN10300_PLT16:
829 /* This symbol requires a procedure linkage table entry. We
830 actually build the entry in adjust_dynamic_symbol,
831 because this might be a case of linking PIC code which is
832 never referenced by a dynamic object, in which case we
833 don't need to generate a procedure linkage table entry
836 /* If this is a local symbol, we resolve it directly without
837 creating a procedure linkage table entry. */
841 if (ELF_ST_VISIBILITY (h->other) == STV_INTERNAL
842 || ELF_ST_VISIBILITY (h->other) == STV_HIDDEN)
852 case R_MN10300_PCREL32:
853 case R_MN10300_PCREL16:
854 case R_MN10300_PCREL8:
863 /* If we are creating a shared library, then we need to copy
864 the reloc into the shared library. */
866 && (sec->flags & SEC_ALLOC) != 0)
868 /* When creating a shared object, we must copy these
869 reloc types into the output file. We create a reloc
870 section in dynobj and make room for this reloc. */
875 name = (bfd_elf_string_from_elf_section
877 elf_elfheader (abfd)->e_shstrndx,
878 elf_section_data (sec)->rel_hdr.sh_name));
882 BFD_ASSERT (strncmp (name, ".rela", 5) == 0
883 && strcmp (bfd_get_section_name (abfd, sec),
886 sreloc = bfd_get_section_by_name (dynobj, name);
891 flags = (SEC_HAS_CONTENTS | SEC_READONLY
892 | SEC_IN_MEMORY | SEC_LINKER_CREATED);
893 if ((sec->flags & SEC_ALLOC) != 0)
894 flags |= SEC_ALLOC | SEC_LOAD;
895 sreloc = bfd_make_section_with_flags (dynobj,
899 || ! bfd_set_section_alignment (dynobj, sreloc, 2))
904 sreloc->size += sizeof (Elf32_External_Rela);
914 /* Return the section that should be marked against GC for a given
918 mn10300_elf_gc_mark_hook (sec, info, rel, h, sym)
920 struct bfd_link_info *info ATTRIBUTE_UNUSED;
921 Elf_Internal_Rela *rel;
922 struct elf_link_hash_entry *h;
923 Elf_Internal_Sym *sym;
927 switch (ELF32_R_TYPE (rel->r_info))
929 case R_MN10300_GNU_VTINHERIT:
930 case R_MN10300_GNU_VTENTRY:
934 switch (h->root.type)
936 case bfd_link_hash_defined:
937 case bfd_link_hash_defweak:
938 return h->root.u.def.section;
940 case bfd_link_hash_common:
941 return h->root.u.c.p->section;
949 return bfd_section_from_elf_index (sec->owner, sym->st_shndx);
954 /* Perform a relocation as part of a final link. */
955 static bfd_reloc_status_type
956 mn10300_elf_final_link_relocate (howto, input_bfd, output_bfd,
957 input_section, contents, offset, value,
958 addend, h, symndx, info, sym_sec, is_local)
959 reloc_howto_type *howto;
961 bfd *output_bfd ATTRIBUTE_UNUSED;
962 asection *input_section;
967 struct elf_link_hash_entry * h;
968 unsigned long symndx;
969 struct bfd_link_info *info;
970 asection *sym_sec ATTRIBUTE_UNUSED;
971 int is_local ATTRIBUTE_UNUSED;
973 unsigned long r_type = howto->type;
974 bfd_byte *hit_data = contents + offset;
976 bfd_vma * local_got_offsets;
981 dynobj = elf_hash_table (info)->dynobj;
982 local_got_offsets = elf_local_got_offsets (input_bfd);
993 case R_MN10300_PCREL8:
994 case R_MN10300_PCREL16:
995 case R_MN10300_PCREL32:
996 case R_MN10300_GOTOFF32:
997 case R_MN10300_GOTOFF24:
998 case R_MN10300_GOTOFF16:
1000 && (input_section->flags & SEC_ALLOC) != 0
1002 && ! SYMBOL_REFERENCES_LOCAL (info, h))
1003 return bfd_reloc_dangerous;
1008 case R_MN10300_NONE:
1009 return bfd_reloc_ok;
1013 && (input_section->flags & SEC_ALLOC) != 0)
1015 Elf_Internal_Rela outrel;
1016 bfd_boolean skip, relocate;
1018 /* When generating a shared object, these relocations are
1019 copied into the output file to be resolved at run
1025 name = (bfd_elf_string_from_elf_section
1027 elf_elfheader (input_bfd)->e_shstrndx,
1028 elf_section_data (input_section)->rel_hdr.sh_name));
1032 BFD_ASSERT (strncmp (name, ".rela", 5) == 0
1033 && strcmp (bfd_get_section_name (input_bfd,
1037 sreloc = bfd_get_section_by_name (dynobj, name);
1038 BFD_ASSERT (sreloc != NULL);
1043 outrel.r_offset = _bfd_elf_section_offset (input_bfd, info,
1044 input_section, offset);
1045 if (outrel.r_offset == (bfd_vma) -1)
1048 outrel.r_offset += (input_section->output_section->vma
1049 + input_section->output_offset);
1053 memset (&outrel, 0, sizeof outrel);
1058 /* h->dynindx may be -1 if this symbol was marked to
1061 || SYMBOL_REFERENCES_LOCAL (info, h))
1064 outrel.r_info = ELF32_R_INFO (0, R_MN10300_RELATIVE);
1065 outrel.r_addend = value + addend;
1069 BFD_ASSERT (h->dynindx != -1);
1071 outrel.r_info = ELF32_R_INFO (h->dynindx, R_MN10300_32);
1072 outrel.r_addend = value + addend;
1076 bfd_elf32_swap_reloca_out (output_bfd, &outrel,
1077 (bfd_byte *) (((Elf32_External_Rela *) sreloc->contents)
1078 + sreloc->reloc_count));
1079 ++sreloc->reloc_count;
1081 /* If this reloc is against an external symbol, we do
1082 not want to fiddle with the addend. Otherwise, we
1083 need to include the symbol value so that it becomes
1084 an addend for the dynamic reloc. */
1086 return bfd_reloc_ok;
1089 bfd_put_32 (input_bfd, value, hit_data);
1090 return bfd_reloc_ok;
1095 if ((long) value > 0x7fffff || (long) value < -0x800000)
1096 return bfd_reloc_overflow;
1098 bfd_put_8 (input_bfd, value & 0xff, hit_data);
1099 bfd_put_8 (input_bfd, (value >> 8) & 0xff, hit_data + 1);
1100 bfd_put_8 (input_bfd, (value >> 16) & 0xff, hit_data + 2);
1101 return bfd_reloc_ok;
1106 if ((long) value > 0x7fff || (long) value < -0x8000)
1107 return bfd_reloc_overflow;
1109 bfd_put_16 (input_bfd, value, hit_data);
1110 return bfd_reloc_ok;
1115 if ((long) value > 0x7f || (long) value < -0x80)
1116 return bfd_reloc_overflow;
1118 bfd_put_8 (input_bfd, value, hit_data);
1119 return bfd_reloc_ok;
1121 case R_MN10300_PCREL8:
1122 value -= (input_section->output_section->vma
1123 + input_section->output_offset);
1127 if ((long) value > 0xff || (long) value < -0x100)
1128 return bfd_reloc_overflow;
1130 bfd_put_8 (input_bfd, value, hit_data);
1131 return bfd_reloc_ok;
1133 case R_MN10300_PCREL16:
1134 value -= (input_section->output_section->vma
1135 + input_section->output_offset);
1139 if ((long) value > 0xffff || (long) value < -0x10000)
1140 return bfd_reloc_overflow;
1142 bfd_put_16 (input_bfd, value, hit_data);
1143 return bfd_reloc_ok;
1145 case R_MN10300_PCREL32:
1146 value -= (input_section->output_section->vma
1147 + input_section->output_offset);
1151 bfd_put_32 (input_bfd, value, hit_data);
1152 return bfd_reloc_ok;
1154 case R_MN10300_GNU_VTINHERIT:
1155 case R_MN10300_GNU_VTENTRY:
1156 return bfd_reloc_ok;
1158 case R_MN10300_GOTPC32:
1159 /* Use global offset table as symbol value. */
1161 value = bfd_get_section_by_name (dynobj,
1162 ".got")->output_section->vma;
1163 value -= (input_section->output_section->vma
1164 + input_section->output_offset);
1168 bfd_put_32 (input_bfd, value, hit_data);
1169 return bfd_reloc_ok;
1171 case R_MN10300_GOTPC16:
1172 /* Use global offset table as symbol value. */
1174 value = bfd_get_section_by_name (dynobj,
1175 ".got")->output_section->vma;
1176 value -= (input_section->output_section->vma
1177 + input_section->output_offset);
1181 if ((long) value > 0xffff || (long) value < -0x10000)
1182 return bfd_reloc_overflow;
1184 bfd_put_16 (input_bfd, value, hit_data);
1185 return bfd_reloc_ok;
1187 case R_MN10300_GOTOFF32:
1188 value -= bfd_get_section_by_name (dynobj,
1189 ".got")->output_section->vma;
1192 bfd_put_32 (input_bfd, value, hit_data);
1193 return bfd_reloc_ok;
1195 case R_MN10300_GOTOFF24:
1196 value -= bfd_get_section_by_name (dynobj,
1197 ".got")->output_section->vma;
1200 if ((long) value > 0x7fffff || (long) value < -0x800000)
1201 return bfd_reloc_overflow;
1203 bfd_put_8 (input_bfd, value, hit_data);
1204 bfd_put_8 (input_bfd, (value >> 8) & 0xff, hit_data + 1);
1205 bfd_put_8 (input_bfd, (value >> 16) & 0xff, hit_data + 2);
1206 return bfd_reloc_ok;
1208 case R_MN10300_GOTOFF16:
1209 value -= bfd_get_section_by_name (dynobj,
1210 ".got")->output_section->vma;
1213 if ((long) value > 0xffff || (long) value < -0x10000)
1214 return bfd_reloc_overflow;
1216 bfd_put_16 (input_bfd, value, hit_data);
1217 return bfd_reloc_ok;
1219 case R_MN10300_PLT32:
1221 && ELF_ST_VISIBILITY (h->other) != STV_INTERNAL
1222 && ELF_ST_VISIBILITY (h->other) != STV_HIDDEN
1223 && h->plt.offset != (bfd_vma) -1)
1227 splt = bfd_get_section_by_name (dynobj, ".plt");
1229 value = (splt->output_section->vma
1230 + splt->output_offset
1231 + h->plt.offset) - value;
1234 value -= (input_section->output_section->vma
1235 + input_section->output_offset);
1239 bfd_put_32 (input_bfd, value, hit_data);
1240 return bfd_reloc_ok;
1242 case R_MN10300_PLT16:
1244 && ELF_ST_VISIBILITY (h->other) != STV_INTERNAL
1245 && ELF_ST_VISIBILITY (h->other) != STV_HIDDEN
1246 && h->plt.offset != (bfd_vma) -1)
1250 splt = bfd_get_section_by_name (dynobj, ".plt");
1252 value = (splt->output_section->vma
1253 + splt->output_offset
1254 + h->plt.offset) - value;
1257 value -= (input_section->output_section->vma
1258 + input_section->output_offset);
1262 if ((long) value > 0xffff || (long) value < -0x10000)
1263 return bfd_reloc_overflow;
1265 bfd_put_16 (input_bfd, value, hit_data);
1266 return bfd_reloc_ok;
1268 case R_MN10300_GOT32:
1269 case R_MN10300_GOT24:
1270 case R_MN10300_GOT16:
1274 sgot = bfd_get_section_by_name (dynobj, ".got");
1280 off = h->got.offset;
1281 BFD_ASSERT (off != (bfd_vma) -1);
1283 if (! elf_hash_table (info)->dynamic_sections_created
1284 || SYMBOL_REFERENCES_LOCAL (info, h))
1285 /* This is actually a static link, or it is a
1286 -Bsymbolic link and the symbol is defined
1287 locally, or the symbol was forced to be local
1288 because of a version file. We must initialize
1289 this entry in the global offset table.
1291 When doing a dynamic link, we create a .rela.got
1292 relocation entry to initialize the value. This
1293 is done in the finish_dynamic_symbol routine. */
1294 bfd_put_32 (output_bfd, value,
1295 sgot->contents + off);
1297 value = sgot->output_offset + off;
1303 off = elf_local_got_offsets (input_bfd)[symndx];
1305 bfd_put_32 (output_bfd, value, sgot->contents + off);
1310 Elf_Internal_Rela outrel;
1312 srelgot = bfd_get_section_by_name (dynobj, ".rela.got");
1313 BFD_ASSERT (srelgot != NULL);
1315 outrel.r_offset = (sgot->output_section->vma
1316 + sgot->output_offset
1318 outrel.r_info = ELF32_R_INFO (0, R_MN10300_RELATIVE);
1319 outrel.r_addend = value;
1320 bfd_elf32_swap_reloca_out (output_bfd, &outrel,
1321 (bfd_byte *) (((Elf32_External_Rela *)
1323 + srelgot->reloc_count));
1324 ++ srelgot->reloc_count;
1327 value = sgot->output_offset + off;
1333 if (r_type == R_MN10300_GOT32)
1335 bfd_put_32 (input_bfd, value, hit_data);
1336 return bfd_reloc_ok;
1338 else if (r_type == R_MN10300_GOT24)
1340 if ((long) value > 0x7fffff || (long) value < -0x800000)
1341 return bfd_reloc_overflow;
1343 bfd_put_8 (input_bfd, value & 0xff, hit_data);
1344 bfd_put_8 (input_bfd, (value >> 8) & 0xff, hit_data + 1);
1345 bfd_put_8 (input_bfd, (value >> 16) & 0xff, hit_data + 2);
1346 return bfd_reloc_ok;
1348 else if (r_type == R_MN10300_GOT16)
1350 if ((long) value > 0xffff || (long) value < -0x10000)
1351 return bfd_reloc_overflow;
1353 bfd_put_16 (input_bfd, value, hit_data);
1354 return bfd_reloc_ok;
1359 return bfd_reloc_notsupported;
1363 /* Relocate an MN10300 ELF section. */
1365 mn10300_elf_relocate_section (output_bfd, info, input_bfd, input_section,
1366 contents, relocs, local_syms, local_sections)
1368 struct bfd_link_info *info;
1370 asection *input_section;
1372 Elf_Internal_Rela *relocs;
1373 Elf_Internal_Sym *local_syms;
1374 asection **local_sections;
1376 Elf_Internal_Shdr *symtab_hdr;
1377 struct elf_link_hash_entry **sym_hashes;
1378 Elf_Internal_Rela *rel, *relend;
1380 if (info->relocatable)
1383 symtab_hdr = &elf_tdata (input_bfd)->symtab_hdr;
1384 sym_hashes = elf_sym_hashes (input_bfd);
1387 relend = relocs + input_section->reloc_count;
1388 for (; rel < relend; rel++)
1391 reloc_howto_type *howto;
1392 unsigned long r_symndx;
1393 Elf_Internal_Sym *sym;
1395 struct elf32_mn10300_link_hash_entry *h;
1397 bfd_reloc_status_type r;
1399 r_symndx = ELF32_R_SYM (rel->r_info);
1400 r_type = ELF32_R_TYPE (rel->r_info);
1401 howto = elf_mn10300_howto_table + r_type;
1403 /* Just skip the vtable gc relocs. */
1404 if (r_type == R_MN10300_GNU_VTINHERIT
1405 || r_type == R_MN10300_GNU_VTENTRY)
1411 if (r_symndx < symtab_hdr->sh_info)
1413 sym = local_syms + r_symndx;
1414 sec = local_sections[r_symndx];
1415 relocation = _bfd_elf_rela_local_sym (output_bfd, sym, &sec, rel);
1419 bfd_boolean unresolved_reloc;
1421 struct elf_link_hash_entry *hh;
1423 RELOC_FOR_GLOBAL_SYMBOL (info, input_bfd, input_section, rel,
1424 r_symndx, symtab_hdr, sym_hashes,
1425 hh, sec, relocation,
1426 unresolved_reloc, warned);
1428 h = (struct elf32_mn10300_link_hash_entry *) hh;
1430 if ((h->root.root.type == bfd_link_hash_defined
1431 || h->root.root.type == bfd_link_hash_defweak)
1432 && ( r_type == R_MN10300_GOTPC32
1433 || r_type == R_MN10300_GOTPC16
1434 || (( r_type == R_MN10300_PLT32
1435 || r_type == R_MN10300_PLT16)
1436 && ELF_ST_VISIBILITY (h->root.other) != STV_INTERNAL
1437 && ELF_ST_VISIBILITY (h->root.other) != STV_HIDDEN
1438 && h->root.plt.offset != (bfd_vma) -1)
1439 || (( r_type == R_MN10300_GOT32
1440 || r_type == R_MN10300_GOT24
1441 || r_type == R_MN10300_GOT16)
1442 && elf_hash_table (info)->dynamic_sections_created
1443 && !SYMBOL_REFERENCES_LOCAL (info, hh))
1444 || (r_type == R_MN10300_32
1445 && !SYMBOL_REFERENCES_LOCAL (info, hh)
1446 && ((input_section->flags & SEC_ALLOC) != 0
1447 /* DWARF will emit R_MN10300_32 relocations
1448 in its sections against symbols defined
1449 externally in shared libraries. We can't
1450 do anything with them here. */
1451 || ((input_section->flags & SEC_DEBUGGING) != 0
1452 && h->root.def_dynamic)))))
1453 /* In these cases, we don't need the relocation
1454 value. We check specially because in some
1455 obscure cases sec->output_section will be NULL. */
1458 else if (unresolved_reloc)
1459 (*_bfd_error_handler)
1460 (_("%s: warning: unresolvable relocation against symbol `%s' from %s section"),
1461 bfd_get_filename (input_bfd), h->root.root.root.string,
1462 bfd_get_section_name (input_bfd, input_section));
1465 r = mn10300_elf_final_link_relocate (howto, input_bfd, output_bfd,
1467 contents, rel->r_offset,
1468 relocation, rel->r_addend,
1469 (struct elf_link_hash_entry *)h,
1471 info, sec, h == NULL);
1473 if (r != bfd_reloc_ok)
1476 const char *msg = (const char *) 0;
1479 name = h->root.root.root.string;
1482 name = (bfd_elf_string_from_elf_section
1483 (input_bfd, symtab_hdr->sh_link, sym->st_name));
1484 if (name == NULL || *name == '\0')
1485 name = bfd_section_name (input_bfd, sec);
1490 case bfd_reloc_overflow:
1491 if (! ((*info->callbacks->reloc_overflow)
1492 (info, (h ? &h->root.root : NULL), name,
1493 howto->name, (bfd_vma) 0, input_bfd,
1494 input_section, rel->r_offset)))
1498 case bfd_reloc_undefined:
1499 if (! ((*info->callbacks->undefined_symbol)
1500 (info, name, input_bfd, input_section,
1501 rel->r_offset, TRUE)))
1505 case bfd_reloc_outofrange:
1506 msg = _("internal error: out of range error");
1509 case bfd_reloc_notsupported:
1510 msg = _("internal error: unsupported relocation error");
1513 case bfd_reloc_dangerous:
1514 msg = _("internal error: dangerous error");
1518 msg = _("internal error: unknown error");
1522 if (!((*info->callbacks->warning)
1523 (info, msg, name, input_bfd, input_section,
1534 /* Finish initializing one hash table entry. */
1536 elf32_mn10300_finish_hash_table_entry (gen_entry, in_args)
1537 struct bfd_hash_entry *gen_entry;
1540 struct elf32_mn10300_link_hash_entry *entry;
1541 struct bfd_link_info *link_info = (struct bfd_link_info *)in_args;
1542 unsigned int byte_count = 0;
1544 entry = (struct elf32_mn10300_link_hash_entry *) gen_entry;
1546 if (entry->root.root.type == bfd_link_hash_warning)
1547 entry = (struct elf32_mn10300_link_hash_entry *) entry->root.root.u.i.link;
1549 /* If we already know we want to convert "call" to "calls" for calls
1550 to this symbol, then return now. */
1551 if (entry->flags == MN10300_CONVERT_CALL_TO_CALLS)
1554 /* If there are no named calls to this symbol, or there's nothing we
1555 can move from the function itself into the "call" instruction,
1556 then note that all "call" instructions should be converted into
1557 "calls" instructions and return. If a symbol is available for
1558 dynamic symbol resolution (overridable or overriding), avoid
1559 custom calling conventions. */
1560 if (entry->direct_calls == 0
1561 || (entry->stack_size == 0 && entry->movm_args == 0)
1562 || (elf_hash_table (link_info)->dynamic_sections_created
1563 && ELF_ST_VISIBILITY (entry->root.other) != STV_INTERNAL
1564 && ELF_ST_VISIBILITY (entry->root.other) != STV_HIDDEN))
1566 /* Make a note that we should convert "call" instructions to "calls"
1567 instructions for calls to this symbol. */
1568 entry->flags |= MN10300_CONVERT_CALL_TO_CALLS;
1572 /* We may be able to move some instructions from the function itself into
1573 the "call" instruction. Count how many bytes we might be able to
1574 eliminate in the function itself. */
1576 /* A movm instruction is two bytes. */
1577 if (entry->movm_args)
1580 /* Count the insn to allocate stack space too. */
1581 if (entry->stack_size > 0)
1583 if (entry->stack_size <= 128)
1589 /* If using "call" will result in larger code, then turn all
1590 the associated "call" instructions into "calls" instructions. */
1591 if (byte_count < entry->direct_calls)
1592 entry->flags |= MN10300_CONVERT_CALL_TO_CALLS;
1594 /* This routine never fails. */
1598 /* This function handles relaxing for the mn10300.
1600 There are quite a few relaxing opportunities available on the mn10300:
1602 * calls:32 -> calls:16 2 bytes
1603 * call:32 -> call:16 2 bytes
1605 * call:32 -> calls:32 1 byte
1606 * call:16 -> calls:16 1 byte
1607 * These are done anytime using "calls" would result
1608 in smaller code, or when necessary to preserve the
1609 meaning of the program.
1613 * In some circumstances we can move instructions
1614 from a function prologue into a "call" instruction.
1615 This is only done if the resulting code is no larger
1616 than the original code.
1618 * jmp:32 -> jmp:16 2 bytes
1619 * jmp:16 -> bra:8 1 byte
1621 * If the previous instruction is a conditional branch
1622 around the jump/bra, we may be able to reverse its condition
1623 and change its target to the jump's target. The jump/bra
1624 can then be deleted. 2 bytes
1626 * mov abs32 -> mov abs16 1 or 2 bytes
1628 * Most instructions which accept imm32 can relax to imm16 1 or 2 bytes
1629 - Most instructions which accept imm16 can relax to imm8 1 or 2 bytes
1631 * Most instructions which accept d32 can relax to d16 1 or 2 bytes
1632 - Most instructions which accept d16 can relax to d8 1 or 2 bytes
1634 We don't handle imm16->imm8 or d16->d8 as they're very rare
1635 and somewhat more difficult to support. */
1638 mn10300_elf_relax_section (abfd, sec, link_info, again)
1641 struct bfd_link_info *link_info;
1644 Elf_Internal_Shdr *symtab_hdr;
1645 Elf_Internal_Rela *internal_relocs = NULL;
1646 Elf_Internal_Rela *irel, *irelend;
1647 bfd_byte *contents = NULL;
1648 Elf_Internal_Sym *isymbuf = NULL;
1649 struct elf32_mn10300_link_hash_table *hash_table;
1650 asection *section = sec;
1652 /* Assume nothing changes. */
1655 /* We need a pointer to the mn10300 specific hash table. */
1656 hash_table = elf32_mn10300_hash_table (link_info);
1658 /* Initialize fields in each hash table entry the first time through. */
1659 if ((hash_table->flags & MN10300_HASH_ENTRIES_INITIALIZED) == 0)
1663 /* Iterate over all the input bfds. */
1664 for (input_bfd = link_info->input_bfds;
1666 input_bfd = input_bfd->link_next)
1668 /* We're going to need all the symbols for each bfd. */
1669 symtab_hdr = &elf_tdata (input_bfd)->symtab_hdr;
1670 if (symtab_hdr->sh_info != 0)
1672 isymbuf = (Elf_Internal_Sym *) symtab_hdr->contents;
1673 if (isymbuf == NULL)
1674 isymbuf = bfd_elf_get_elf_syms (input_bfd, symtab_hdr,
1675 symtab_hdr->sh_info, 0,
1677 if (isymbuf == NULL)
1681 /* Iterate over each section in this bfd. */
1682 for (section = input_bfd->sections;
1684 section = section->next)
1686 struct elf32_mn10300_link_hash_entry *hash;
1687 Elf_Internal_Sym *sym;
1688 asection *sym_sec = NULL;
1689 const char *sym_name;
1692 /* If there's nothing to do in this section, skip it. */
1693 if (! (((section->flags & SEC_RELOC) != 0
1694 && section->reloc_count != 0)
1695 || (section->flags & SEC_CODE) != 0))
1698 /* Get cached copy of section contents if it exists. */
1699 if (elf_section_data (section)->this_hdr.contents != NULL)
1700 contents = elf_section_data (section)->this_hdr.contents;
1701 else if (section->size != 0)
1703 /* Go get them off disk. */
1704 if (!bfd_malloc_and_get_section (input_bfd, section,
1711 /* If there aren't any relocs, then there's nothing to do. */
1712 if ((section->flags & SEC_RELOC) != 0
1713 && section->reloc_count != 0)
1716 /* Get a copy of the native relocations. */
1717 internal_relocs = (_bfd_elf_link_read_relocs
1718 (input_bfd, section, (PTR) NULL,
1719 (Elf_Internal_Rela *) NULL,
1720 link_info->keep_memory));
1721 if (internal_relocs == NULL)
1724 /* Now examine each relocation. */
1725 irel = internal_relocs;
1726 irelend = irel + section->reloc_count;
1727 for (; irel < irelend; irel++)
1730 unsigned long r_index;
1733 r_type = ELF32_R_TYPE (irel->r_info);
1734 r_index = ELF32_R_SYM (irel->r_info);
1736 if (r_type < 0 || r_type >= (int) R_MN10300_MAX)
1739 /* We need the name and hash table entry of the target
1745 if (r_index < symtab_hdr->sh_info)
1747 /* A local symbol. */
1748 Elf_Internal_Sym *isym;
1749 struct elf_link_hash_table *elftab;
1752 isym = isymbuf + r_index;
1753 if (isym->st_shndx == SHN_UNDEF)
1754 sym_sec = bfd_und_section_ptr;
1755 else if (isym->st_shndx == SHN_ABS)
1756 sym_sec = bfd_abs_section_ptr;
1757 else if (isym->st_shndx == SHN_COMMON)
1758 sym_sec = bfd_com_section_ptr;
1761 = bfd_section_from_elf_index (input_bfd,
1765 = bfd_elf_string_from_elf_section (input_bfd,
1770 /* If it isn't a function, then we don't care
1772 if (ELF_ST_TYPE (isym->st_info) != STT_FUNC)
1775 /* Tack on an ID so we can uniquely identify this
1776 local symbol in the global hash table. */
1777 amt = strlen (sym_name) + 10;
1778 new_name = bfd_malloc (amt);
1782 sprintf (new_name, "%s_%08x", sym_name, sym_sec->id);
1783 sym_name = new_name;
1785 elftab = &hash_table->static_hash_table->root;
1786 hash = ((struct elf32_mn10300_link_hash_entry *)
1787 elf_link_hash_lookup (elftab, sym_name,
1788 TRUE, TRUE, FALSE));
1793 r_index -= symtab_hdr->sh_info;
1794 hash = (struct elf32_mn10300_link_hash_entry *)
1795 elf_sym_hashes (input_bfd)[r_index];
1798 /* If this is not a "call" instruction, then we
1799 should convert "call" instructions to "calls"
1801 code = bfd_get_8 (input_bfd,
1802 contents + irel->r_offset - 1);
1803 if (code != 0xdd && code != 0xcd)
1804 hash->flags |= MN10300_CONVERT_CALL_TO_CALLS;
1806 /* If this is a jump/call, then bump the
1807 direct_calls counter. Else force "call" to
1808 "calls" conversions. */
1809 if (r_type == R_MN10300_PCREL32
1810 || r_type == R_MN10300_PLT32
1811 || r_type == R_MN10300_PLT16
1812 || r_type == R_MN10300_PCREL16)
1813 hash->direct_calls++;
1815 hash->flags |= MN10300_CONVERT_CALL_TO_CALLS;
1819 /* Now look at the actual contents to get the stack size,
1820 and a list of what registers were saved in the prologue
1822 if ((section->flags & SEC_CODE) != 0)
1824 Elf_Internal_Sym *isym, *isymend;
1825 unsigned int sec_shndx;
1826 struct elf_link_hash_entry **hashes;
1827 struct elf_link_hash_entry **end_hashes;
1828 unsigned int symcount;
1830 sec_shndx = _bfd_elf_section_from_bfd_section (input_bfd,
1833 symcount = (symtab_hdr->sh_size / sizeof (Elf32_External_Sym)
1834 - symtab_hdr->sh_info);
1835 hashes = elf_sym_hashes (input_bfd);
1836 end_hashes = hashes + symcount;
1838 /* Look at each function defined in this section and
1839 update info for that function. */
1840 isymend = isymbuf + symtab_hdr->sh_info;
1841 for (isym = isymbuf; isym < isymend; isym++)
1843 if (isym->st_shndx == sec_shndx
1844 && ELF_ST_TYPE (isym->st_info) == STT_FUNC)
1846 struct elf_link_hash_table *elftab;
1848 struct elf_link_hash_entry **lhashes = hashes;
1850 /* Skip a local symbol if it aliases a
1852 for (; lhashes < end_hashes; lhashes++)
1854 hash = (struct elf32_mn10300_link_hash_entry *) *lhashes;
1855 if ((hash->root.root.type == bfd_link_hash_defined
1856 || hash->root.root.type == bfd_link_hash_defweak)
1857 && hash->root.root.u.def.section == section
1858 && hash->root.type == STT_FUNC
1859 && hash->root.root.u.def.value == isym->st_value)
1862 if (lhashes != end_hashes)
1865 if (isym->st_shndx == SHN_UNDEF)
1866 sym_sec = bfd_und_section_ptr;
1867 else if (isym->st_shndx == SHN_ABS)
1868 sym_sec = bfd_abs_section_ptr;
1869 else if (isym->st_shndx == SHN_COMMON)
1870 sym_sec = bfd_com_section_ptr;
1873 = bfd_section_from_elf_index (input_bfd,
1876 sym_name = (bfd_elf_string_from_elf_section
1877 (input_bfd, symtab_hdr->sh_link,
1880 /* Tack on an ID so we can uniquely identify this
1881 local symbol in the global hash table. */
1882 amt = strlen (sym_name) + 10;
1883 new_name = bfd_malloc (amt);
1887 sprintf (new_name, "%s_%08x", sym_name, sym_sec->id);
1888 sym_name = new_name;
1890 elftab = &hash_table->static_hash_table->root;
1891 hash = ((struct elf32_mn10300_link_hash_entry *)
1892 elf_link_hash_lookup (elftab, sym_name,
1893 TRUE, TRUE, FALSE));
1895 compute_function_info (input_bfd, hash,
1896 isym->st_value, contents);
1900 for (; hashes < end_hashes; hashes++)
1902 hash = (struct elf32_mn10300_link_hash_entry *) *hashes;
1903 if ((hash->root.root.type == bfd_link_hash_defined
1904 || hash->root.root.type == bfd_link_hash_defweak)
1905 && hash->root.root.u.def.section == section
1906 && hash->root.type == STT_FUNC)
1907 compute_function_info (input_bfd, hash,
1908 (hash)->root.root.u.def.value,
1913 /* Cache or free any memory we allocated for the relocs. */
1914 if (internal_relocs != NULL
1915 && elf_section_data (section)->relocs != internal_relocs)
1916 free (internal_relocs);
1917 internal_relocs = NULL;
1919 /* Cache or free any memory we allocated for the contents. */
1920 if (contents != NULL
1921 && elf_section_data (section)->this_hdr.contents != contents)
1923 if (! link_info->keep_memory)
1927 /* Cache the section contents for elf_link_input_bfd. */
1928 elf_section_data (section)->this_hdr.contents = contents;
1934 /* Cache or free any memory we allocated for the symbols. */
1936 && symtab_hdr->contents != (unsigned char *) isymbuf)
1938 if (! link_info->keep_memory)
1942 /* Cache the symbols for elf_link_input_bfd. */
1943 symtab_hdr->contents = (unsigned char *) isymbuf;
1949 /* Now iterate on each symbol in the hash table and perform
1950 the final initialization steps on each. */
1951 elf32_mn10300_link_hash_traverse (hash_table,
1952 elf32_mn10300_finish_hash_table_entry,
1954 elf32_mn10300_link_hash_traverse (hash_table->static_hash_table,
1955 elf32_mn10300_finish_hash_table_entry,
1958 /* All entries in the hash table are fully initialized. */
1959 hash_table->flags |= MN10300_HASH_ENTRIES_INITIALIZED;
1961 /* Now that everything has been initialized, go through each
1962 code section and delete any prologue insns which will be
1963 redundant because their operations will be performed by
1964 a "call" instruction. */
1965 for (input_bfd = link_info->input_bfds;
1967 input_bfd = input_bfd->link_next)
1969 /* We're going to need all the local symbols for each bfd. */
1970 symtab_hdr = &elf_tdata (input_bfd)->symtab_hdr;
1971 if (symtab_hdr->sh_info != 0)
1973 isymbuf = (Elf_Internal_Sym *) symtab_hdr->contents;
1974 if (isymbuf == NULL)
1975 isymbuf = bfd_elf_get_elf_syms (input_bfd, symtab_hdr,
1976 symtab_hdr->sh_info, 0,
1978 if (isymbuf == NULL)
1982 /* Walk over each section in this bfd. */
1983 for (section = input_bfd->sections;
1985 section = section->next)
1987 unsigned int sec_shndx;
1988 Elf_Internal_Sym *isym, *isymend;
1989 struct elf_link_hash_entry **hashes;
1990 struct elf_link_hash_entry **end_hashes;
1991 unsigned int symcount;
1993 /* Skip non-code sections and empty sections. */
1994 if ((section->flags & SEC_CODE) == 0 || section->size == 0)
1997 if (section->reloc_count != 0)
1999 /* Get a copy of the native relocations. */
2000 internal_relocs = (_bfd_elf_link_read_relocs
2001 (input_bfd, section, (PTR) NULL,
2002 (Elf_Internal_Rela *) NULL,
2003 link_info->keep_memory));
2004 if (internal_relocs == NULL)
2008 /* Get cached copy of section contents if it exists. */
2009 if (elf_section_data (section)->this_hdr.contents != NULL)
2010 contents = elf_section_data (section)->this_hdr.contents;
2013 /* Go get them off disk. */
2014 if (!bfd_malloc_and_get_section (input_bfd, section,
2019 sec_shndx = _bfd_elf_section_from_bfd_section (input_bfd,
2022 /* Now look for any function in this section which needs
2023 insns deleted from its prologue. */
2024 isymend = isymbuf + symtab_hdr->sh_info;
2025 for (isym = isymbuf; isym < isymend; isym++)
2027 struct elf32_mn10300_link_hash_entry *sym_hash;
2028 asection *sym_sec = NULL;
2029 const char *sym_name;
2031 struct elf_link_hash_table *elftab;
2034 if (isym->st_shndx != sec_shndx)
2037 if (isym->st_shndx == SHN_UNDEF)
2038 sym_sec = bfd_und_section_ptr;
2039 else if (isym->st_shndx == SHN_ABS)
2040 sym_sec = bfd_abs_section_ptr;
2041 else if (isym->st_shndx == SHN_COMMON)
2042 sym_sec = bfd_com_section_ptr;
2045 = bfd_section_from_elf_index (input_bfd, isym->st_shndx);
2048 = bfd_elf_string_from_elf_section (input_bfd,
2049 symtab_hdr->sh_link,
2052 /* Tack on an ID so we can uniquely identify this
2053 local symbol in the global hash table. */
2054 amt = strlen (sym_name) + 10;
2055 new_name = bfd_malloc (amt);
2058 sprintf (new_name, "%s_%08x", sym_name, sym_sec->id);
2059 sym_name = new_name;
2061 elftab = &hash_table->static_hash_table->root;
2062 sym_hash = ((struct elf32_mn10300_link_hash_entry *)
2063 elf_link_hash_lookup (elftab, sym_name,
2064 FALSE, FALSE, FALSE));
2067 if (sym_hash == NULL)
2070 if (! (sym_hash->flags & MN10300_CONVERT_CALL_TO_CALLS)
2071 && ! (sym_hash->flags & MN10300_DELETED_PROLOGUE_BYTES))
2075 /* Note that we've changed things. */
2076 elf_section_data (section)->relocs = internal_relocs;
2077 elf_section_data (section)->this_hdr.contents = contents;
2078 symtab_hdr->contents = (unsigned char *) isymbuf;
2080 /* Count how many bytes we're going to delete. */
2081 if (sym_hash->movm_args)
2084 if (sym_hash->stack_size > 0)
2086 if (sym_hash->stack_size <= 128)
2092 /* Note that we've deleted prologue bytes for this
2094 sym_hash->flags |= MN10300_DELETED_PROLOGUE_BYTES;
2096 /* Actually delete the bytes. */
2097 if (!mn10300_elf_relax_delete_bytes (input_bfd,
2103 /* Something changed. Not strictly necessary, but
2104 may lead to more relaxing opportunities. */
2109 /* Look for any global functions in this section which
2110 need insns deleted from their prologues. */
2111 symcount = (symtab_hdr->sh_size / sizeof (Elf32_External_Sym)
2112 - symtab_hdr->sh_info);
2113 hashes = elf_sym_hashes (input_bfd);
2114 end_hashes = hashes + symcount;
2115 for (; hashes < end_hashes; hashes++)
2117 struct elf32_mn10300_link_hash_entry *sym_hash;
2119 sym_hash = (struct elf32_mn10300_link_hash_entry *) *hashes;
2120 if ((sym_hash->root.root.type == bfd_link_hash_defined
2121 || sym_hash->root.root.type == bfd_link_hash_defweak)
2122 && sym_hash->root.root.u.def.section == section
2123 && ! (sym_hash->flags & MN10300_CONVERT_CALL_TO_CALLS)
2124 && ! (sym_hash->flags & MN10300_DELETED_PROLOGUE_BYTES))
2129 /* Note that we've changed things. */
2130 elf_section_data (section)->relocs = internal_relocs;
2131 elf_section_data (section)->this_hdr.contents = contents;
2132 symtab_hdr->contents = (unsigned char *) isymbuf;
2134 /* Count how many bytes we're going to delete. */
2135 if (sym_hash->movm_args)
2138 if (sym_hash->stack_size > 0)
2140 if (sym_hash->stack_size <= 128)
2146 /* Note that we've deleted prologue bytes for this
2148 sym_hash->flags |= MN10300_DELETED_PROLOGUE_BYTES;
2150 /* Actually delete the bytes. */
2151 symval = sym_hash->root.root.u.def.value;
2152 if (!mn10300_elf_relax_delete_bytes (input_bfd,
2158 /* Something changed. Not strictly necessary, but
2159 may lead to more relaxing opportunities. */
2164 /* Cache or free any memory we allocated for the relocs. */
2165 if (internal_relocs != NULL
2166 && elf_section_data (section)->relocs != internal_relocs)
2167 free (internal_relocs);
2168 internal_relocs = NULL;
2170 /* Cache or free any memory we allocated for the contents. */
2171 if (contents != NULL
2172 && elf_section_data (section)->this_hdr.contents != contents)
2174 if (! link_info->keep_memory)
2178 /* Cache the section contents for elf_link_input_bfd. */
2179 elf_section_data (section)->this_hdr.contents = contents;
2185 /* Cache or free any memory we allocated for the symbols. */
2187 && symtab_hdr->contents != (unsigned char *) isymbuf)
2189 if (! link_info->keep_memory)
2193 /* Cache the symbols for elf_link_input_bfd. */
2194 symtab_hdr->contents = (unsigned char *) isymbuf;
2201 /* (Re)initialize for the basic instruction shortening/relaxing pass. */
2203 internal_relocs = NULL;
2205 /* For error_return. */
2208 /* We don't have to do anything for a relocatable link, if
2209 this section does not have relocs, or if this is not a
2211 if (link_info->relocatable
2212 || (sec->flags & SEC_RELOC) == 0
2213 || sec->reloc_count == 0
2214 || (sec->flags & SEC_CODE) == 0)
2217 symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
2219 /* Get a copy of the native relocations. */
2220 internal_relocs = (_bfd_elf_link_read_relocs
2221 (abfd, sec, (PTR) NULL, (Elf_Internal_Rela *) NULL,
2222 link_info->keep_memory));
2223 if (internal_relocs == NULL)
2226 /* Walk through them looking for relaxing opportunities. */
2227 irelend = internal_relocs + sec->reloc_count;
2228 for (irel = internal_relocs; irel < irelend; irel++)
2231 struct elf32_mn10300_link_hash_entry *h = NULL;
2233 /* If this isn't something that can be relaxed, then ignore
2235 if (ELF32_R_TYPE (irel->r_info) == (int) R_MN10300_NONE
2236 || ELF32_R_TYPE (irel->r_info) == (int) R_MN10300_8
2237 || ELF32_R_TYPE (irel->r_info) == (int) R_MN10300_MAX)
2240 /* Get the section contents if we haven't done so already. */
2241 if (contents == NULL)
2243 /* Get cached copy if it exists. */
2244 if (elf_section_data (sec)->this_hdr.contents != NULL)
2245 contents = elf_section_data (sec)->this_hdr.contents;
2248 /* Go get them off disk. */
2249 if (!bfd_malloc_and_get_section (abfd, sec, &contents))
2254 /* Read this BFD's symbols if we haven't done so already. */
2255 if (isymbuf == NULL && symtab_hdr->sh_info != 0)
2257 isymbuf = (Elf_Internal_Sym *) symtab_hdr->contents;
2258 if (isymbuf == NULL)
2259 isymbuf = bfd_elf_get_elf_syms (abfd, symtab_hdr,
2260 symtab_hdr->sh_info, 0,
2262 if (isymbuf == NULL)
2266 /* Get the value of the symbol referred to by the reloc. */
2267 if (ELF32_R_SYM (irel->r_info) < symtab_hdr->sh_info)
2269 Elf_Internal_Sym *isym;
2270 asection *sym_sec = NULL;
2271 const char *sym_name;
2273 bfd_vma saved_addend;
2275 /* A local symbol. */
2276 isym = isymbuf + ELF32_R_SYM (irel->r_info);
2277 if (isym->st_shndx == SHN_UNDEF)
2278 sym_sec = bfd_und_section_ptr;
2279 else if (isym->st_shndx == SHN_ABS)
2280 sym_sec = bfd_abs_section_ptr;
2281 else if (isym->st_shndx == SHN_COMMON)
2282 sym_sec = bfd_com_section_ptr;
2284 sym_sec = bfd_section_from_elf_index (abfd, isym->st_shndx);
2286 sym_name = bfd_elf_string_from_elf_section (abfd,
2287 symtab_hdr->sh_link,
2290 if ((sym_sec->flags & SEC_MERGE)
2291 && ELF_ST_TYPE (isym->st_info) == STT_SECTION
2292 && sym_sec->sec_info_type == ELF_INFO_TYPE_MERGE)
2294 saved_addend = irel->r_addend;
2295 symval = _bfd_elf_rela_local_sym (abfd, isym, &sym_sec, irel);
2296 symval += irel->r_addend;
2297 irel->r_addend = saved_addend;
2301 symval = (isym->st_value
2302 + sym_sec->output_section->vma
2303 + sym_sec->output_offset);
2305 /* Tack on an ID so we can uniquely identify this
2306 local symbol in the global hash table. */
2307 new_name = bfd_malloc ((bfd_size_type) strlen (sym_name) + 10);
2310 sprintf (new_name, "%s_%08x", sym_name, sym_sec->id);
2311 sym_name = new_name;
2313 h = (struct elf32_mn10300_link_hash_entry *)
2314 elf_link_hash_lookup (&hash_table->static_hash_table->root,
2315 sym_name, FALSE, FALSE, FALSE);
2322 /* An external symbol. */
2323 indx = ELF32_R_SYM (irel->r_info) - symtab_hdr->sh_info;
2324 h = (struct elf32_mn10300_link_hash_entry *)
2325 (elf_sym_hashes (abfd)[indx]);
2326 BFD_ASSERT (h != NULL);
2327 if (h->root.root.type != bfd_link_hash_defined
2328 && h->root.root.type != bfd_link_hash_defweak)
2330 /* This appears to be a reference to an undefined
2331 symbol. Just ignore it--it will be caught by the
2332 regular reloc processing. */
2336 symval = (h->root.root.u.def.value
2337 + h->root.root.u.def.section->output_section->vma
2338 + h->root.root.u.def.section->output_offset);
2341 /* For simplicity of coding, we are going to modify the section
2342 contents, the section relocs, and the BFD symbol table. We
2343 must tell the rest of the code not to free up this
2344 information. It would be possible to instead create a table
2345 of changes which have to be made, as is done in coff-mips.c;
2346 that would be more work, but would require less memory when
2347 the linker is run. */
2349 /* Try to turn a 32bit pc-relative branch/call into a 16bit pc-relative
2350 branch/call, also deal with "call" -> "calls" conversions and
2351 insertion of prologue data into "call" instructions. */
2352 if (ELF32_R_TYPE (irel->r_info) == (int) R_MN10300_PCREL32
2353 || ELF32_R_TYPE (irel->r_info) == (int) R_MN10300_PLT32)
2355 bfd_vma value = symval;
2357 if (ELF32_R_TYPE (irel->r_info) == (int) R_MN10300_PLT32
2359 && ELF_ST_VISIBILITY (h->root.other) != STV_INTERNAL
2360 && ELF_ST_VISIBILITY (h->root.other) != STV_HIDDEN
2361 && h->root.plt.offset != (bfd_vma) -1)
2365 splt = bfd_get_section_by_name (elf_hash_table (link_info)
2368 value = ((splt->output_section->vma
2369 + splt->output_offset
2370 + h->root.plt.offset)
2371 - (sec->output_section->vma
2372 + sec->output_offset
2376 /* If we've got a "call" instruction that needs to be turned
2377 into a "calls" instruction, do so now. It saves a byte. */
2378 if (h && (h->flags & MN10300_CONVERT_CALL_TO_CALLS))
2382 /* Get the opcode. */
2383 code = bfd_get_8 (abfd, contents + irel->r_offset - 1);
2385 /* Make sure we're working with a "call" instruction! */
2388 /* Note that we've changed the relocs, section contents,
2390 elf_section_data (sec)->relocs = internal_relocs;
2391 elf_section_data (sec)->this_hdr.contents = contents;
2392 symtab_hdr->contents = (unsigned char *) isymbuf;
2394 /* Fix the opcode. */
2395 bfd_put_8 (abfd, 0xfc, contents + irel->r_offset - 1);
2396 bfd_put_8 (abfd, 0xff, contents + irel->r_offset);
2398 /* Fix irel->r_offset and irel->r_addend. */
2399 irel->r_offset += 1;
2400 irel->r_addend += 1;
2402 /* Delete one byte of data. */
2403 if (!mn10300_elf_relax_delete_bytes (abfd, sec,
2404 irel->r_offset + 3, 1))
2407 /* That will change things, so, we should relax again.
2408 Note that this is not required, and it may be slow. */
2414 /* We've got a "call" instruction which needs some data
2415 from target function filled in. */
2418 /* Get the opcode. */
2419 code = bfd_get_8 (abfd, contents + irel->r_offset - 1);
2421 /* Insert data from the target function into the "call"
2422 instruction if needed. */
2425 bfd_put_8 (abfd, h->movm_args, contents + irel->r_offset + 4);
2426 bfd_put_8 (abfd, h->stack_size + h->movm_stack_size,
2427 contents + irel->r_offset + 5);
2431 /* Deal with pc-relative gunk. */
2432 value -= (sec->output_section->vma + sec->output_offset);
2433 value -= irel->r_offset;
2434 value += irel->r_addend;
2436 /* See if the value will fit in 16 bits, note the high value is
2437 0x7fff + 2 as the target will be two bytes closer if we are
2439 if ((long) value < 0x8001 && (long) value > -0x8000)
2443 /* Get the opcode. */
2444 code = bfd_get_8 (abfd, contents + irel->r_offset - 1);
2446 if (code != 0xdc && code != 0xdd && code != 0xff)
2449 /* Note that we've changed the relocs, section contents, etc. */
2450 elf_section_data (sec)->relocs = internal_relocs;
2451 elf_section_data (sec)->this_hdr.contents = contents;
2452 symtab_hdr->contents = (unsigned char *) isymbuf;
2454 /* Fix the opcode. */
2456 bfd_put_8 (abfd, 0xcc, contents + irel->r_offset - 1);
2457 else if (code == 0xdd)
2458 bfd_put_8 (abfd, 0xcd, contents + irel->r_offset - 1);
2459 else if (code == 0xff)
2460 bfd_put_8 (abfd, 0xfa, contents + irel->r_offset - 2);
2462 /* Fix the relocation's type. */
2463 irel->r_info = ELF32_R_INFO (ELF32_R_SYM (irel->r_info),
2464 (ELF32_R_TYPE (irel->r_info)
2465 == (int) R_MN10300_PLT32)
2469 /* Delete two bytes of data. */
2470 if (!mn10300_elf_relax_delete_bytes (abfd, sec,
2471 irel->r_offset + 1, 2))
2474 /* That will change things, so, we should relax again.
2475 Note that this is not required, and it may be slow. */
2480 /* Try to turn a 16bit pc-relative branch into a 8bit pc-relative
2482 if (ELF32_R_TYPE (irel->r_info) == (int) R_MN10300_PCREL16)
2484 bfd_vma value = symval;
2486 /* If we've got a "call" instruction that needs to be turned
2487 into a "calls" instruction, do so now. It saves a byte. */
2488 if (h && (h->flags & MN10300_CONVERT_CALL_TO_CALLS))
2492 /* Get the opcode. */
2493 code = bfd_get_8 (abfd, contents + irel->r_offset - 1);
2495 /* Make sure we're working with a "call" instruction! */
2498 /* Note that we've changed the relocs, section contents,
2500 elf_section_data (sec)->relocs = internal_relocs;
2501 elf_section_data (sec)->this_hdr.contents = contents;
2502 symtab_hdr->contents = (unsigned char *) isymbuf;
2504 /* Fix the opcode. */
2505 bfd_put_8 (abfd, 0xfa, contents + irel->r_offset - 1);
2506 bfd_put_8 (abfd, 0xff, contents + irel->r_offset);
2508 /* Fix irel->r_offset and irel->r_addend. */
2509 irel->r_offset += 1;
2510 irel->r_addend += 1;
2512 /* Delete one byte of data. */
2513 if (!mn10300_elf_relax_delete_bytes (abfd, sec,
2514 irel->r_offset + 1, 1))
2517 /* That will change things, so, we should relax again.
2518 Note that this is not required, and it may be slow. */
2526 /* Get the opcode. */
2527 code = bfd_get_8 (abfd, contents + irel->r_offset - 1);
2529 /* Insert data from the target function into the "call"
2530 instruction if needed. */
2533 bfd_put_8 (abfd, h->movm_args, contents + irel->r_offset + 2);
2534 bfd_put_8 (abfd, h->stack_size + h->movm_stack_size,
2535 contents + irel->r_offset + 3);
2539 /* Deal with pc-relative gunk. */
2540 value -= (sec->output_section->vma + sec->output_offset);
2541 value -= irel->r_offset;
2542 value += irel->r_addend;
2544 /* See if the value will fit in 8 bits, note the high value is
2545 0x7f + 1 as the target will be one bytes closer if we are
2547 if ((long) value < 0x80 && (long) value > -0x80)
2551 /* Get the opcode. */
2552 code = bfd_get_8 (abfd, contents + irel->r_offset - 1);
2557 /* Note that we've changed the relocs, section contents, etc. */
2558 elf_section_data (sec)->relocs = internal_relocs;
2559 elf_section_data (sec)->this_hdr.contents = contents;
2560 symtab_hdr->contents = (unsigned char *) isymbuf;
2562 /* Fix the opcode. */
2563 bfd_put_8 (abfd, 0xca, contents + irel->r_offset - 1);
2565 /* Fix the relocation's type. */
2566 irel->r_info = ELF32_R_INFO (ELF32_R_SYM (irel->r_info),
2569 /* Delete one byte of data. */
2570 if (!mn10300_elf_relax_delete_bytes (abfd, sec,
2571 irel->r_offset + 1, 1))
2574 /* That will change things, so, we should relax again.
2575 Note that this is not required, and it may be slow. */
2580 /* Try to eliminate an unconditional 8 bit pc-relative branch
2581 which immediately follows a conditional 8 bit pc-relative
2582 branch around the unconditional branch.
2589 This happens when the bCC can't reach lab2 at assembly time,
2590 but due to other relaxations it can reach at link time. */
2591 if (ELF32_R_TYPE (irel->r_info) == (int) R_MN10300_PCREL8)
2593 Elf_Internal_Rela *nrel;
2594 bfd_vma value = symval;
2597 /* Deal with pc-relative gunk. */
2598 value -= (sec->output_section->vma + sec->output_offset);
2599 value -= irel->r_offset;
2600 value += irel->r_addend;
2602 /* Do nothing if this reloc is the last byte in the section. */
2603 if (irel->r_offset == sec->size)
2606 /* See if the next instruction is an unconditional pc-relative
2607 branch, more often than not this test will fail, so we
2608 test it first to speed things up. */
2609 code = bfd_get_8 (abfd, contents + irel->r_offset + 1);
2613 /* Also make sure the next relocation applies to the next
2614 instruction and that it's a pc-relative 8 bit branch. */
2617 || irel->r_offset + 2 != nrel->r_offset
2618 || ELF32_R_TYPE (nrel->r_info) != (int) R_MN10300_PCREL8)
2621 /* Make sure our destination immediately follows the
2622 unconditional branch. */
2623 if (symval != (sec->output_section->vma + sec->output_offset
2624 + irel->r_offset + 3))
2627 /* Now make sure we are a conditional branch. This may not
2628 be necessary, but why take the chance.
2630 Note these checks assume that R_MN10300_PCREL8 relocs
2631 only occur on bCC and bCCx insns. If they occured
2632 elsewhere, we'd need to know the start of this insn
2633 for this check to be accurate. */
2634 code = bfd_get_8 (abfd, contents + irel->r_offset - 1);
2635 if (code != 0xc0 && code != 0xc1 && code != 0xc2
2636 && code != 0xc3 && code != 0xc4 && code != 0xc5
2637 && code != 0xc6 && code != 0xc7 && code != 0xc8
2638 && code != 0xc9 && code != 0xe8 && code != 0xe9
2639 && code != 0xea && code != 0xeb)
2642 /* We also have to be sure there is no symbol/label
2643 at the unconditional branch. */
2644 if (mn10300_elf_symbol_address_p (abfd, sec, isymbuf,
2645 irel->r_offset + 1))
2648 /* Note that we've changed the relocs, section contents, etc. */
2649 elf_section_data (sec)->relocs = internal_relocs;
2650 elf_section_data (sec)->this_hdr.contents = contents;
2651 symtab_hdr->contents = (unsigned char *) isymbuf;
2653 /* Reverse the condition of the first branch. */
2699 bfd_put_8 (abfd, code, contents + irel->r_offset - 1);
2701 /* Set the reloc type and symbol for the first branch
2702 from the second branch. */
2703 irel->r_info = nrel->r_info;
2705 /* Make the reloc for the second branch a null reloc. */
2706 nrel->r_info = ELF32_R_INFO (ELF32_R_SYM (nrel->r_info),
2709 /* Delete two bytes of data. */
2710 if (!mn10300_elf_relax_delete_bytes (abfd, sec,
2711 irel->r_offset + 1, 2))
2714 /* That will change things, so, we should relax again.
2715 Note that this is not required, and it may be slow. */
2719 /* Try to turn a 24 immediate, displacement or absolute address
2720 into a 8 immediate, displacement or absolute address. */
2721 if (ELF32_R_TYPE (irel->r_info) == (int) R_MN10300_24)
2723 bfd_vma value = symval;
2724 value += irel->r_addend;
2726 /* See if the value will fit in 8 bits. */
2727 if ((long) value < 0x7f && (long) value > -0x80)
2731 /* AM33 insns which have 24 operands are 6 bytes long and
2732 will have 0xfd as the first byte. */
2734 /* Get the first opcode. */
2735 code = bfd_get_8 (abfd, contents + irel->r_offset - 3);
2739 /* Get the second opcode. */
2740 code = bfd_get_8 (abfd, contents + irel->r_offset - 2);
2742 /* We can not relax 0x6b, 0x7b, 0x8b, 0x9b as no 24bit
2743 equivalent instructions exists. */
2744 if (code != 0x6b && code != 0x7b
2745 && code != 0x8b && code != 0x9b
2746 && ((code & 0x0f) == 0x09 || (code & 0x0f) == 0x08
2747 || (code & 0x0f) == 0x0a || (code & 0x0f) == 0x0b
2748 || (code & 0x0f) == 0x0e))
2750 /* Not safe if the high bit is on as relaxing may
2751 move the value out of high mem and thus not fit
2752 in a signed 8bit value. This is currently over
2754 if ((value & 0x80) == 0)
2756 /* Note that we've changed the relocation contents,
2758 elf_section_data (sec)->relocs = internal_relocs;
2759 elf_section_data (sec)->this_hdr.contents = contents;
2760 symtab_hdr->contents = (unsigned char *) isymbuf;
2762 /* Fix the opcode. */
2763 bfd_put_8 (abfd, 0xfb, contents + irel->r_offset - 3);
2764 bfd_put_8 (abfd, code, contents + irel->r_offset - 2);
2766 /* Fix the relocation's type. */
2768 ELF32_R_INFO (ELF32_R_SYM (irel->r_info),
2771 /* Delete two bytes of data. */
2772 if (!mn10300_elf_relax_delete_bytes (abfd, sec,
2773 irel->r_offset + 1, 2))
2776 /* That will change things, so, we should relax
2777 again. Note that this is not required, and it
2787 /* Try to turn a 32bit immediate, displacement or absolute address
2788 into a 16bit immediate, displacement or absolute address. */
2789 if (ELF32_R_TYPE (irel->r_info) == (int) R_MN10300_32
2790 || ELF32_R_TYPE (irel->r_info) == (int) R_MN10300_GOT32
2791 || ELF32_R_TYPE (irel->r_info) == (int) R_MN10300_GOTOFF32
2792 || ELF32_R_TYPE (irel->r_info) == (int) R_MN10300_GOTPC32)
2794 bfd_vma value = symval;
2796 if (ELF32_R_TYPE (irel->r_info) != (int) R_MN10300_32)
2800 sgot = bfd_get_section_by_name (elf_hash_table (link_info)
2803 if (ELF32_R_TYPE (irel->r_info) == (int) R_MN10300_GOT32)
2805 value = sgot->output_offset;
2808 value += h->root.got.offset;
2810 value += (elf_local_got_offsets
2811 (abfd)[ELF32_R_SYM (irel->r_info)]);
2813 else if (ELF32_R_TYPE (irel->r_info) == (int) R_MN10300_GOTOFF32)
2814 value -= sgot->output_section->vma;
2815 else if (ELF32_R_TYPE (irel->r_info) == (int) R_MN10300_GOTPC32)
2816 value = (sgot->output_section->vma
2817 - (sec->output_section->vma
2818 + sec->output_offset
2824 value += irel->r_addend;
2826 /* See if the value will fit in 24 bits.
2827 We allow any 16bit match here. We prune those we can't
2829 if ((long) value < 0x7fffff && (long) value > -0x800000)
2833 /* AM33 insns which have 32bit operands are 7 bytes long and
2834 will have 0xfe as the first byte. */
2836 /* Get the first opcode. */
2837 code = bfd_get_8 (abfd, contents + irel->r_offset - 3);
2841 /* Get the second opcode. */
2842 code = bfd_get_8 (abfd, contents + irel->r_offset - 2);
2844 /* All the am33 32 -> 24 relaxing possibilities. */
2845 /* We can not relax 0x6b, 0x7b, 0x8b, 0x9b as no 24bit
2846 equivalent instructions exists. */
2847 if (code != 0x6b && code != 0x7b
2848 && code != 0x8b && code != 0x9b
2849 && (ELF32_R_TYPE (irel->r_info)
2850 != (int) R_MN10300_GOTPC32)
2851 && ((code & 0x0f) == 0x09 || (code & 0x0f) == 0x08
2852 || (code & 0x0f) == 0x0a || (code & 0x0f) == 0x0b
2853 || (code & 0x0f) == 0x0e))
2855 /* Not safe if the high bit is on as relaxing may
2856 move the value out of high mem and thus not fit
2857 in a signed 16bit value. This is currently over
2859 if ((value & 0x8000) == 0)
2861 /* Note that we've changed the relocation contents,
2863 elf_section_data (sec)->relocs = internal_relocs;
2864 elf_section_data (sec)->this_hdr.contents = contents;
2865 symtab_hdr->contents = (unsigned char *) isymbuf;
2867 /* Fix the opcode. */
2868 bfd_put_8 (abfd, 0xfd, contents + irel->r_offset - 3);
2869 bfd_put_8 (abfd, code, contents + irel->r_offset - 2);
2871 /* Fix the relocation's type. */
2873 ELF32_R_INFO (ELF32_R_SYM (irel->r_info),
2874 (ELF32_R_TYPE (irel->r_info)
2875 == (int) R_MN10300_GOTOFF32)
2876 ? R_MN10300_GOTOFF24
2877 : (ELF32_R_TYPE (irel->r_info)
2878 == (int) R_MN10300_GOT32)
2882 /* Delete one byte of data. */
2883 if (!mn10300_elf_relax_delete_bytes (abfd, sec,
2884 irel->r_offset + 3, 1))
2887 /* That will change things, so, we should relax
2888 again. Note that this is not required, and it
2897 /* See if the value will fit in 16 bits.
2898 We allow any 16bit match here. We prune those we can't
2900 if ((long) value < 0x7fff && (long) value > -0x8000)
2904 /* Most insns which have 32bit operands are 6 bytes long;
2905 exceptions are pcrel insns and bit insns.
2907 We handle pcrel insns above. We don't bother trying
2908 to handle the bit insns here.
2910 The first byte of the remaining insns will be 0xfc. */
2912 /* Get the first opcode. */
2913 code = bfd_get_8 (abfd, contents + irel->r_offset - 2);
2918 /* Get the second opcode. */
2919 code = bfd_get_8 (abfd, contents + irel->r_offset - 1);
2921 if ((code & 0xf0) < 0x80)
2922 switch (code & 0xf0)
2924 /* mov (d32,am),dn -> mov (d32,am),dn
2925 mov dm,(d32,am) -> mov dn,(d32,am)
2926 mov (d32,am),an -> mov (d32,am),an
2927 mov dm,(d32,am) -> mov dn,(d32,am)
2928 movbu (d32,am),dn -> movbu (d32,am),dn
2929 movbu dm,(d32,am) -> movbu dn,(d32,am)
2930 movhu (d32,am),dn -> movhu (d32,am),dn
2931 movhu dm,(d32,am) -> movhu dn,(d32,am) */
2940 /* Not safe if the high bit is on as relaxing may
2941 move the value out of high mem and thus not fit
2942 in a signed 16bit value. */
2944 && (value & 0x8000))
2947 /* Note that we've changed the relocation contents, etc. */
2948 elf_section_data (sec)->relocs = internal_relocs;
2949 elf_section_data (sec)->this_hdr.contents = contents;
2950 symtab_hdr->contents = (unsigned char *) isymbuf;
2952 /* Fix the opcode. */
2953 bfd_put_8 (abfd, 0xfa, contents + irel->r_offset - 2);
2954 bfd_put_8 (abfd, code, contents + irel->r_offset - 1);
2956 /* Fix the relocation's type. */
2957 irel->r_info = ELF32_R_INFO (ELF32_R_SYM (irel->r_info),
2958 (ELF32_R_TYPE (irel->r_info)
2959 == (int) R_MN10300_GOTOFF32)
2960 ? R_MN10300_GOTOFF16
2961 : (ELF32_R_TYPE (irel->r_info)
2962 == (int) R_MN10300_GOT32)
2964 : (ELF32_R_TYPE (irel->r_info)
2965 == (int) R_MN10300_GOTPC32)
2966 ? R_MN10300_GOTPC16 :
2969 /* Delete two bytes of data. */
2970 if (!mn10300_elf_relax_delete_bytes (abfd, sec,
2971 irel->r_offset + 2, 2))
2974 /* That will change things, so, we should relax again.
2975 Note that this is not required, and it may be slow. */
2979 else if ((code & 0xf0) == 0x80
2980 || (code & 0xf0) == 0x90)
2981 switch (code & 0xf3)
2983 /* mov dn,(abs32) -> mov dn,(abs16)
2984 movbu dn,(abs32) -> movbu dn,(abs16)
2985 movhu dn,(abs32) -> movhu dn,(abs16) */
2989 /* Note that we've changed the relocation contents, etc. */
2990 elf_section_data (sec)->relocs = internal_relocs;
2991 elf_section_data (sec)->this_hdr.contents = contents;
2992 symtab_hdr->contents = (unsigned char *) isymbuf;
2994 if ((code & 0xf3) == 0x81)
2995 code = 0x01 + (code & 0x0c);
2996 else if ((code & 0xf3) == 0x82)
2997 code = 0x02 + (code & 0x0c);
2998 else if ((code & 0xf3) == 0x83)
2999 code = 0x03 + (code & 0x0c);
3003 /* Fix the opcode. */
3004 bfd_put_8 (abfd, code, contents + irel->r_offset - 2);
3006 /* Fix the relocation's type. */
3007 irel->r_info = ELF32_R_INFO (ELF32_R_SYM (irel->r_info),
3008 (ELF32_R_TYPE (irel->r_info)
3009 == (int) R_MN10300_GOTOFF32)
3010 ? R_MN10300_GOTOFF16
3011 : (ELF32_R_TYPE (irel->r_info)
3012 == (int) R_MN10300_GOT32)
3014 : (ELF32_R_TYPE (irel->r_info)
3015 == (int) R_MN10300_GOTPC32)
3016 ? R_MN10300_GOTPC16 :
3019 /* The opcode got shorter too, so we have to fix the
3020 addend and offset too! */
3021 irel->r_offset -= 1;
3023 /* Delete three bytes of data. */
3024 if (!mn10300_elf_relax_delete_bytes (abfd, sec,
3025 irel->r_offset + 1, 3))
3028 /* That will change things, so, we should relax again.
3029 Note that this is not required, and it may be slow. */
3033 /* mov am,(abs32) -> mov am,(abs16)
3034 mov am,(d32,sp) -> mov am,(d16,sp)
3035 mov dm,(d32,sp) -> mov dm,(d32,sp)
3036 movbu dm,(d32,sp) -> movbu dm,(d32,sp)
3037 movhu dm,(d32,sp) -> movhu dm,(d32,sp) */
3043 /* sp-based offsets are zero-extended. */
3044 if (code >= 0x90 && code <= 0x93
3048 /* Note that we've changed the relocation contents, etc. */
3049 elf_section_data (sec)->relocs = internal_relocs;
3050 elf_section_data (sec)->this_hdr.contents = contents;
3051 symtab_hdr->contents = (unsigned char *) isymbuf;
3053 /* Fix the opcode. */
3054 bfd_put_8 (abfd, 0xfa, contents + irel->r_offset - 2);
3055 bfd_put_8 (abfd, code, contents + irel->r_offset - 1);
3057 /* Fix the relocation's type. */
3058 irel->r_info = ELF32_R_INFO (ELF32_R_SYM (irel->r_info),
3059 (ELF32_R_TYPE (irel->r_info)
3060 == (int) R_MN10300_GOTOFF32)
3061 ? R_MN10300_GOTOFF16
3062 : (ELF32_R_TYPE (irel->r_info)
3063 == (int) R_MN10300_GOT32)
3065 : (ELF32_R_TYPE (irel->r_info)
3066 == (int) R_MN10300_GOTPC32)
3067 ? R_MN10300_GOTPC16 :
3070 /* Delete two bytes of data. */
3071 if (!mn10300_elf_relax_delete_bytes (abfd, sec,
3072 irel->r_offset + 2, 2))
3075 /* That will change things, so, we should relax again.
3076 Note that this is not required, and it may be slow. */
3080 else if ((code & 0xf0) < 0xf0)
3081 switch (code & 0xfc)
3083 /* mov imm32,dn -> mov imm16,dn
3084 mov imm32,an -> mov imm16,an
3085 mov (abs32),dn -> mov (abs16),dn
3086 movbu (abs32),dn -> movbu (abs16),dn
3087 movhu (abs32),dn -> movhu (abs16),dn */
3093 /* Not safe if the high bit is on as relaxing may
3094 move the value out of high mem and thus not fit
3095 in a signed 16bit value. */
3097 && (value & 0x8000))
3100 /* mov imm16, an zero-extends the immediate. */
3105 /* Note that we've changed the relocation contents, etc. */
3106 elf_section_data (sec)->relocs = internal_relocs;
3107 elf_section_data (sec)->this_hdr.contents = contents;
3108 symtab_hdr->contents = (unsigned char *) isymbuf;
3110 if ((code & 0xfc) == 0xcc)
3111 code = 0x2c + (code & 0x03);
3112 else if ((code & 0xfc) == 0xdc)
3113 code = 0x24 + (code & 0x03);
3114 else if ((code & 0xfc) == 0xa4)
3115 code = 0x30 + (code & 0x03);
3116 else if ((code & 0xfc) == 0xa8)
3117 code = 0x34 + (code & 0x03);
3118 else if ((code & 0xfc) == 0xac)
3119 code = 0x38 + (code & 0x03);
3123 /* Fix the opcode. */
3124 bfd_put_8 (abfd, code, contents + irel->r_offset - 2);
3126 /* Fix the relocation's type. */
3127 irel->r_info = ELF32_R_INFO (ELF32_R_SYM (irel->r_info),
3128 (ELF32_R_TYPE (irel->r_info)
3129 == (int) R_MN10300_GOTOFF32)
3130 ? R_MN10300_GOTOFF16
3131 : (ELF32_R_TYPE (irel->r_info)
3132 == (int) R_MN10300_GOT32)
3134 : (ELF32_R_TYPE (irel->r_info)
3135 == (int) R_MN10300_GOTPC32)
3136 ? R_MN10300_GOTPC16 :
3139 /* The opcode got shorter too, so we have to fix the
3140 addend and offset too! */
3141 irel->r_offset -= 1;
3143 /* Delete three bytes of data. */
3144 if (!mn10300_elf_relax_delete_bytes (abfd, sec,
3145 irel->r_offset + 1, 3))
3148 /* That will change things, so, we should relax again.
3149 Note that this is not required, and it may be slow. */
3153 /* mov (abs32),an -> mov (abs16),an
3154 mov (d32,sp),an -> mov (d16,sp),an
3155 mov (d32,sp),dn -> mov (d16,sp),dn
3156 movbu (d32,sp),dn -> movbu (d16,sp),dn
3157 movhu (d32,sp),dn -> movhu (d16,sp),dn
3158 add imm32,dn -> add imm16,dn
3159 cmp imm32,dn -> cmp imm16,dn
3160 add imm32,an -> add imm16,an
3161 cmp imm32,an -> cmp imm16,an
3162 and imm32,dn -> and imm16,dn
3163 or imm32,dn -> or imm16,dn
3164 xor imm32,dn -> xor imm16,dn
3165 btst imm32,dn -> btst imm16,dn */
3181 /* cmp imm16, an zero-extends the immediate. */
3186 /* So do sp-based offsets. */
3187 if (code >= 0xb0 && code <= 0xb3
3191 /* Note that we've changed the relocation contents, etc. */
3192 elf_section_data (sec)->relocs = internal_relocs;
3193 elf_section_data (sec)->this_hdr.contents = contents;
3194 symtab_hdr->contents = (unsigned char *) isymbuf;
3196 /* Fix the opcode. */
3197 bfd_put_8 (abfd, 0xfa, contents + irel->r_offset - 2);
3198 bfd_put_8 (abfd, code, contents + irel->r_offset - 1);
3200 /* Fix the relocation's type. */
3201 irel->r_info = ELF32_R_INFO (ELF32_R_SYM (irel->r_info),
3202 (ELF32_R_TYPE (irel->r_info)
3203 == (int) R_MN10300_GOTOFF32)
3204 ? R_MN10300_GOTOFF16
3205 : (ELF32_R_TYPE (irel->r_info)
3206 == (int) R_MN10300_GOT32)
3208 : (ELF32_R_TYPE (irel->r_info)
3209 == (int) R_MN10300_GOTPC32)
3210 ? R_MN10300_GOTPC16 :
3213 /* Delete two bytes of data. */
3214 if (!mn10300_elf_relax_delete_bytes (abfd, sec,
3215 irel->r_offset + 2, 2))
3218 /* That will change things, so, we should relax again.
3219 Note that this is not required, and it may be slow. */
3223 else if (code == 0xfe)
3225 /* add imm32,sp -> add imm16,sp */
3227 /* Note that we've changed the relocation contents, etc. */
3228 elf_section_data (sec)->relocs = internal_relocs;
3229 elf_section_data (sec)->this_hdr.contents = contents;
3230 symtab_hdr->contents = (unsigned char *) isymbuf;
3232 /* Fix the opcode. */
3233 bfd_put_8 (abfd, 0xfa, contents + irel->r_offset - 2);
3234 bfd_put_8 (abfd, 0xfe, contents + irel->r_offset - 1);
3236 /* Fix the relocation's type. */
3237 irel->r_info = ELF32_R_INFO (ELF32_R_SYM (irel->r_info),
3238 (ELF32_R_TYPE (irel->r_info)
3239 == (int) R_MN10300_GOT32)
3241 : (ELF32_R_TYPE (irel->r_info)
3242 == (int) R_MN10300_GOTOFF32)
3243 ? R_MN10300_GOTOFF16
3244 : (ELF32_R_TYPE (irel->r_info)
3245 == (int) R_MN10300_GOTPC32)
3246 ? R_MN10300_GOTPC16 :
3249 /* Delete two bytes of data. */
3250 if (!mn10300_elf_relax_delete_bytes (abfd, sec,
3251 irel->r_offset + 2, 2))
3254 /* That will change things, so, we should relax again.
3255 Note that this is not required, and it may be slow. */
3264 && symtab_hdr->contents != (unsigned char *) isymbuf)
3266 if (! link_info->keep_memory)
3270 /* Cache the symbols for elf_link_input_bfd. */
3271 symtab_hdr->contents = (unsigned char *) isymbuf;
3275 if (contents != NULL
3276 && elf_section_data (sec)->this_hdr.contents != contents)
3278 if (! link_info->keep_memory)
3282 /* Cache the section contents for elf_link_input_bfd. */
3283 elf_section_data (sec)->this_hdr.contents = contents;
3287 if (internal_relocs != NULL
3288 && elf_section_data (sec)->relocs != internal_relocs)
3289 free (internal_relocs);
3295 && symtab_hdr->contents != (unsigned char *) isymbuf)
3297 if (contents != NULL
3298 && elf_section_data (section)->this_hdr.contents != contents)
3300 if (internal_relocs != NULL
3301 && elf_section_data (section)->relocs != internal_relocs)
3302 free (internal_relocs);
3307 /* Compute the stack size and movm arguments for the function
3308 referred to by HASH at address ADDR in section with
3309 contents CONTENTS, store the information in the hash table. */
3311 compute_function_info (abfd, hash, addr, contents)
3313 struct elf32_mn10300_link_hash_entry *hash;
3315 unsigned char *contents;
3317 unsigned char byte1, byte2;
3318 /* We only care about a very small subset of the possible prologue
3319 sequences here. Basically we look for:
3321 movm [d2,d3,a2,a3],sp (optional)
3322 add <size>,sp (optional, and only for sizes which fit in an unsigned
3325 If we find anything else, we quit. */
3327 /* Look for movm [regs],sp */
3328 byte1 = bfd_get_8 (abfd, contents + addr);
3329 byte2 = bfd_get_8 (abfd, contents + addr + 1);
3333 hash->movm_args = byte2;
3335 byte1 = bfd_get_8 (abfd, contents + addr);
3336 byte2 = bfd_get_8 (abfd, contents + addr + 1);
3339 /* Now figure out how much stack space will be allocated by the movm
3340 instruction. We need this kept separate from the function's normal
3342 if (hash->movm_args)
3345 if (hash->movm_args & 0x80)
3346 hash->movm_stack_size += 4;
3349 if (hash->movm_args & 0x40)
3350 hash->movm_stack_size += 4;
3353 if (hash->movm_args & 0x20)
3354 hash->movm_stack_size += 4;
3357 if (hash->movm_args & 0x10)
3358 hash->movm_stack_size += 4;
3360 /* "other" space. d0, d1, a0, a1, mdr, lir, lar, 4 byte pad. */
3361 if (hash->movm_args & 0x08)
3362 hash->movm_stack_size += 8 * 4;
3364 if (bfd_get_mach (abfd) == bfd_mach_am33
3365 || bfd_get_mach (abfd) == bfd_mach_am33_2)
3367 /* "exother" space. e0, e1, mdrq, mcrh, mcrl, mcvf */
3368 if (hash->movm_args & 0x1)
3369 hash->movm_stack_size += 6 * 4;
3371 /* exreg1 space. e4, e5, e6, e7 */
3372 if (hash->movm_args & 0x2)
3373 hash->movm_stack_size += 4 * 4;
3375 /* exreg0 space. e2, e3 */
3376 if (hash->movm_args & 0x4)
3377 hash->movm_stack_size += 2 * 4;
3381 /* Now look for the two stack adjustment variants. */
3382 if (byte1 == 0xf8 && byte2 == 0xfe)
3384 int temp = bfd_get_8 (abfd, contents + addr + 2);
3385 temp = ((temp & 0xff) ^ (~0x7f)) + 0x80;
3387 hash->stack_size = -temp;
3389 else if (byte1 == 0xfa && byte2 == 0xfe)
3391 int temp = bfd_get_16 (abfd, contents + addr + 2);
3392 temp = ((temp & 0xffff) ^ (~0x7fff)) + 0x8000;
3396 hash->stack_size = temp;
3399 /* If the total stack to be allocated by the call instruction is more
3400 than 255 bytes, then we can't remove the stack adjustment by using
3401 "call" (we might still be able to remove the "movm" instruction. */
3402 if (hash->stack_size + hash->movm_stack_size > 255)
3403 hash->stack_size = 0;
3408 /* Delete some bytes from a section while relaxing. */
3411 mn10300_elf_relax_delete_bytes (abfd, sec, addr, count)
3417 Elf_Internal_Shdr *symtab_hdr;
3418 unsigned int sec_shndx;
3420 Elf_Internal_Rela *irel, *irelend;
3421 Elf_Internal_Rela *irelalign;
3423 Elf_Internal_Sym *isym, *isymend;
3424 struct elf_link_hash_entry **sym_hashes;
3425 struct elf_link_hash_entry **end_hashes;
3426 unsigned int symcount;
3428 sec_shndx = _bfd_elf_section_from_bfd_section (abfd, sec);
3430 contents = elf_section_data (sec)->this_hdr.contents;
3432 /* The deletion must stop at the next ALIGN reloc for an aligment
3433 power larger than the number of bytes we are deleting. */
3438 irel = elf_section_data (sec)->relocs;
3439 irelend = irel + sec->reloc_count;
3441 /* Actually delete the bytes. */
3442 memmove (contents + addr, contents + addr + count,
3443 (size_t) (toaddr - addr - count));
3446 /* Adjust all the relocs. */
3447 for (irel = elf_section_data (sec)->relocs; irel < irelend; irel++)
3449 /* Get the new reloc address. */
3450 if ((irel->r_offset > addr
3451 && irel->r_offset < toaddr))
3452 irel->r_offset -= count;
3455 /* Adjust the local symbols defined in this section. */
3456 symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
3457 isym = (Elf_Internal_Sym *) symtab_hdr->contents;
3458 for (isymend = isym + symtab_hdr->sh_info; isym < isymend; isym++)
3460 if (isym->st_shndx == sec_shndx
3461 && isym->st_value > addr
3462 && isym->st_value < toaddr)
3463 isym->st_value -= count;
3466 /* Now adjust the global symbols defined in this section. */
3467 symcount = (symtab_hdr->sh_size / sizeof (Elf32_External_Sym)
3468 - symtab_hdr->sh_info);
3469 sym_hashes = elf_sym_hashes (abfd);
3470 end_hashes = sym_hashes + symcount;
3471 for (; sym_hashes < end_hashes; sym_hashes++)
3473 struct elf_link_hash_entry *sym_hash = *sym_hashes;
3474 if ((sym_hash->root.type == bfd_link_hash_defined
3475 || sym_hash->root.type == bfd_link_hash_defweak)
3476 && sym_hash->root.u.def.section == sec
3477 && sym_hash->root.u.def.value > addr
3478 && sym_hash->root.u.def.value < toaddr)
3480 sym_hash->root.u.def.value -= count;
3487 /* Return TRUE if a symbol exists at the given address, else return
3490 mn10300_elf_symbol_address_p (abfd, sec, isym, addr)
3493 Elf_Internal_Sym *isym;
3496 Elf_Internal_Shdr *symtab_hdr;
3497 unsigned int sec_shndx;
3498 Elf_Internal_Sym *isymend;
3499 struct elf_link_hash_entry **sym_hashes;
3500 struct elf_link_hash_entry **end_hashes;
3501 unsigned int symcount;
3503 sec_shndx = _bfd_elf_section_from_bfd_section (abfd, sec);
3505 /* Examine all the symbols. */
3506 symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
3507 for (isymend = isym + symtab_hdr->sh_info; isym < isymend; isym++)
3509 if (isym->st_shndx == sec_shndx
3510 && isym->st_value == addr)
3514 symcount = (symtab_hdr->sh_size / sizeof (Elf32_External_Sym)
3515 - symtab_hdr->sh_info);
3516 sym_hashes = elf_sym_hashes (abfd);
3517 end_hashes = sym_hashes + symcount;
3518 for (; sym_hashes < end_hashes; sym_hashes++)
3520 struct elf_link_hash_entry *sym_hash = *sym_hashes;
3521 if ((sym_hash->root.type == bfd_link_hash_defined
3522 || sym_hash->root.type == bfd_link_hash_defweak)
3523 && sym_hash->root.u.def.section == sec
3524 && sym_hash->root.u.def.value == addr)
3531 /* This is a version of bfd_generic_get_relocated_section_contents
3532 which uses mn10300_elf_relocate_section. */
3535 mn10300_elf_get_relocated_section_contents (output_bfd, link_info, link_order,
3536 data, relocatable, symbols)
3538 struct bfd_link_info *link_info;
3539 struct bfd_link_order *link_order;
3541 bfd_boolean relocatable;
3544 Elf_Internal_Shdr *symtab_hdr;
3545 asection *input_section = link_order->u.indirect.section;
3546 bfd *input_bfd = input_section->owner;
3547 asection **sections = NULL;
3548 Elf_Internal_Rela *internal_relocs = NULL;
3549 Elf_Internal_Sym *isymbuf = NULL;
3551 /* We only need to handle the case of relaxing, or of having a
3552 particular set of section contents, specially. */
3554 || elf_section_data (input_section)->this_hdr.contents == NULL)
3555 return bfd_generic_get_relocated_section_contents (output_bfd, link_info,
3560 symtab_hdr = &elf_tdata (input_bfd)->symtab_hdr;
3562 memcpy (data, elf_section_data (input_section)->this_hdr.contents,
3563 (size_t) input_section->size);
3565 if ((input_section->flags & SEC_RELOC) != 0
3566 && input_section->reloc_count > 0)
3569 Elf_Internal_Sym *isym, *isymend;
3572 internal_relocs = (_bfd_elf_link_read_relocs
3573 (input_bfd, input_section, (PTR) NULL,
3574 (Elf_Internal_Rela *) NULL, FALSE));
3575 if (internal_relocs == NULL)
3578 if (symtab_hdr->sh_info != 0)
3580 isymbuf = (Elf_Internal_Sym *) symtab_hdr->contents;
3581 if (isymbuf == NULL)
3582 isymbuf = bfd_elf_get_elf_syms (input_bfd, symtab_hdr,
3583 symtab_hdr->sh_info, 0,
3585 if (isymbuf == NULL)
3589 amt = symtab_hdr->sh_info;
3590 amt *= sizeof (asection *);
3591 sections = (asection **) bfd_malloc (amt);
3592 if (sections == NULL && amt != 0)
3595 isymend = isymbuf + symtab_hdr->sh_info;
3596 for (isym = isymbuf, secpp = sections; isym < isymend; ++isym, ++secpp)
3600 if (isym->st_shndx == SHN_UNDEF)
3601 isec = bfd_und_section_ptr;
3602 else if (isym->st_shndx == SHN_ABS)
3603 isec = bfd_abs_section_ptr;
3604 else if (isym->st_shndx == SHN_COMMON)
3605 isec = bfd_com_section_ptr;
3607 isec = bfd_section_from_elf_index (input_bfd, isym->st_shndx);
3612 if (! mn10300_elf_relocate_section (output_bfd, link_info, input_bfd,
3613 input_section, data, internal_relocs,
3617 if (sections != NULL)
3619 if (isymbuf != NULL && symtab_hdr->contents != (unsigned char *) isymbuf)
3621 if (internal_relocs != elf_section_data (input_section)->relocs)
3622 free (internal_relocs);
3628 if (sections != NULL)
3630 if (isymbuf != NULL && symtab_hdr->contents != (unsigned char *) isymbuf)
3632 if (internal_relocs != NULL
3633 && internal_relocs != elf_section_data (input_section)->relocs)
3634 free (internal_relocs);
3638 /* Assorted hash table functions. */
3640 /* Initialize an entry in the link hash table. */
3642 /* Create an entry in an MN10300 ELF linker hash table. */
3644 static struct bfd_hash_entry *
3645 elf32_mn10300_link_hash_newfunc (entry, table, string)
3646 struct bfd_hash_entry *entry;
3647 struct bfd_hash_table *table;
3650 struct elf32_mn10300_link_hash_entry *ret =
3651 (struct elf32_mn10300_link_hash_entry *) entry;
3653 /* Allocate the structure if it has not already been allocated by a
3655 if (ret == (struct elf32_mn10300_link_hash_entry *) NULL)
3656 ret = ((struct elf32_mn10300_link_hash_entry *)
3657 bfd_hash_allocate (table,
3658 sizeof (struct elf32_mn10300_link_hash_entry)));
3659 if (ret == (struct elf32_mn10300_link_hash_entry *) NULL)
3660 return (struct bfd_hash_entry *) ret;
3662 /* Call the allocation method of the superclass. */
3663 ret = ((struct elf32_mn10300_link_hash_entry *)
3664 _bfd_elf_link_hash_newfunc ((struct bfd_hash_entry *) ret,
3666 if (ret != (struct elf32_mn10300_link_hash_entry *) NULL)
3668 ret->direct_calls = 0;
3669 ret->stack_size = 0;
3671 ret->movm_stack_size = 0;
3675 return (struct bfd_hash_entry *) ret;
3678 /* Create an mn10300 ELF linker hash table. */
3680 static struct bfd_link_hash_table *
3681 elf32_mn10300_link_hash_table_create (abfd)
3684 struct elf32_mn10300_link_hash_table *ret;
3685 bfd_size_type amt = sizeof (struct elf32_mn10300_link_hash_table);
3687 ret = (struct elf32_mn10300_link_hash_table *) bfd_malloc (amt);
3688 if (ret == (struct elf32_mn10300_link_hash_table *) NULL)
3691 if (! _bfd_elf_link_hash_table_init (&ret->root, abfd,
3692 elf32_mn10300_link_hash_newfunc))
3699 amt = sizeof (struct elf_link_hash_table);
3700 ret->static_hash_table
3701 = (struct elf32_mn10300_link_hash_table *) bfd_malloc (amt);
3702 if (ret->static_hash_table == NULL)
3708 if (! _bfd_elf_link_hash_table_init (&ret->static_hash_table->root, abfd,
3709 elf32_mn10300_link_hash_newfunc))
3711 free (ret->static_hash_table);
3715 return &ret->root.root;
3718 /* Free an mn10300 ELF linker hash table. */
3721 elf32_mn10300_link_hash_table_free (hash)
3722 struct bfd_link_hash_table *hash;
3724 struct elf32_mn10300_link_hash_table *ret
3725 = (struct elf32_mn10300_link_hash_table *) hash;
3727 _bfd_generic_link_hash_table_free
3728 ((struct bfd_link_hash_table *) ret->static_hash_table);
3729 _bfd_generic_link_hash_table_free
3730 ((struct bfd_link_hash_table *) ret);
3733 static unsigned long
3734 elf_mn10300_mach (flags)
3737 switch (flags & EF_MN10300_MACH)
3739 case E_MN10300_MACH_MN10300:
3741 return bfd_mach_mn10300;
3743 case E_MN10300_MACH_AM33:
3744 return bfd_mach_am33;
3746 case E_MN10300_MACH_AM33_2:
3747 return bfd_mach_am33_2;
3751 /* The final processing done just before writing out a MN10300 ELF object
3752 file. This gets the MN10300 architecture right based on the machine
3756 _bfd_mn10300_elf_final_write_processing (abfd, linker)
3758 bfd_boolean linker ATTRIBUTE_UNUSED;
3762 switch (bfd_get_mach (abfd))
3765 case bfd_mach_mn10300:
3766 val = E_MN10300_MACH_MN10300;
3770 val = E_MN10300_MACH_AM33;
3773 case bfd_mach_am33_2:
3774 val = E_MN10300_MACH_AM33_2;
3778 elf_elfheader (abfd)->e_flags &= ~ (EF_MN10300_MACH);
3779 elf_elfheader (abfd)->e_flags |= val;
3783 _bfd_mn10300_elf_object_p (abfd)
3786 bfd_default_set_arch_mach (abfd, bfd_arch_mn10300,
3787 elf_mn10300_mach (elf_elfheader (abfd)->e_flags));
3791 /* Merge backend specific data from an object file to the output
3792 object file when linking. */
3795 _bfd_mn10300_elf_merge_private_bfd_data (ibfd, obfd)
3799 if (bfd_get_flavour (ibfd) != bfd_target_elf_flavour
3800 || bfd_get_flavour (obfd) != bfd_target_elf_flavour)
3803 if (bfd_get_arch (obfd) == bfd_get_arch (ibfd)
3804 && bfd_get_mach (obfd) < bfd_get_mach (ibfd))
3806 if (! bfd_set_arch_mach (obfd, bfd_get_arch (ibfd),
3807 bfd_get_mach (ibfd)))
3814 #define PLT0_ENTRY_SIZE 15
3815 #define PLT_ENTRY_SIZE 20
3816 #define PIC_PLT_ENTRY_SIZE 24
3818 static const bfd_byte elf_mn10300_plt0_entry[PLT0_ENTRY_SIZE] =
3820 0xfc, 0xa0, 0, 0, 0, 0, /* mov (.got+8),a0 */
3821 0xfe, 0xe, 0x10, 0, 0, 0, 0, /* mov (.got+4),r1 */
3822 0xf0, 0xf4, /* jmp (a0) */
3825 static const bfd_byte elf_mn10300_plt_entry[PLT_ENTRY_SIZE] =
3827 0xfc, 0xa0, 0, 0, 0, 0, /* mov (nameN@GOT + .got),a0 */
3828 0xf0, 0xf4, /* jmp (a0) */
3829 0xfe, 8, 0, 0, 0, 0, 0, /* mov reloc-table-address,r0 */
3830 0xdc, 0, 0, 0, 0, /* jmp .plt0 */
3833 static const bfd_byte elf_mn10300_pic_plt_entry[PIC_PLT_ENTRY_SIZE] =
3835 0xfc, 0x22, 0, 0, 0, 0, /* mov (nameN@GOT,a2),a0 */
3836 0xf0, 0xf4, /* jmp (a0) */
3837 0xfe, 8, 0, 0, 0, 0, 0, /* mov reloc-table-address,r0 */
3838 0xf8, 0x22, 8, /* mov (8,a2),a0 */
3839 0xfb, 0xa, 0x1a, 4, /* mov (4,a2),r1 */
3840 0xf0, 0xf4, /* jmp (a0) */
3843 /* Return size of the first PLT entry. */
3844 #define elf_mn10300_sizeof_plt0(info) \
3845 (info->shared ? PIC_PLT_ENTRY_SIZE : PLT0_ENTRY_SIZE)
3847 /* Return size of a PLT entry. */
3848 #define elf_mn10300_sizeof_plt(info) \
3849 (info->shared ? PIC_PLT_ENTRY_SIZE : PLT_ENTRY_SIZE)
3851 /* Return offset of the PLT0 address in an absolute PLT entry. */
3852 #define elf_mn10300_plt_plt0_offset(info) 16
3854 /* Return offset of the linker in PLT0 entry. */
3855 #define elf_mn10300_plt0_linker_offset(info) 2
3857 /* Return offset of the GOT id in PLT0 entry. */
3858 #define elf_mn10300_plt0_gotid_offset(info) 9
3860 /* Return offset of the temporary in PLT entry */
3861 #define elf_mn10300_plt_temp_offset(info) 8
3863 /* Return offset of the symbol in PLT entry. */
3864 #define elf_mn10300_plt_symbol_offset(info) 2
3866 /* Return offset of the relocation in PLT entry. */
3867 #define elf_mn10300_plt_reloc_offset(info) 11
3869 /* The name of the dynamic interpreter. This is put in the .interp
3872 #define ELF_DYNAMIC_INTERPRETER "/lib/ld.so.1"
3874 /* Create dynamic sections when linking against a dynamic object. */
3877 _bfd_mn10300_elf_create_dynamic_sections (abfd, info)
3879 struct bfd_link_info *info;
3883 const struct elf_backend_data * bed = get_elf_backend_data (abfd);
3886 switch (bed->s->arch_size)
3897 bfd_set_error (bfd_error_bad_value);
3901 /* We need to create .plt, .rel[a].plt, .got, .got.plt, .dynbss, and
3902 .rel[a].bss sections. */
3904 flags = (SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS | SEC_IN_MEMORY
3905 | SEC_LINKER_CREATED);
3907 s = bfd_make_section_with_flags (abfd,
3908 (bed->default_use_rela_p
3909 ? ".rela.plt" : ".rel.plt"),
3910 flags | SEC_READONLY);
3912 || ! bfd_set_section_alignment (abfd, s, ptralign))
3915 if (! _bfd_mn10300_elf_create_got_section (abfd, info))
3919 const char * secname;
3924 for (sec = abfd->sections; sec; sec = sec->next)
3926 secflags = bfd_get_section_flags (abfd, sec);
3927 if ((secflags & (SEC_DATA | SEC_LINKER_CREATED))
3928 || ((secflags & SEC_HAS_CONTENTS) != SEC_HAS_CONTENTS))
3931 secname = bfd_get_section_name (abfd, sec);
3932 relname = (char *) bfd_malloc (strlen (secname) + 6);
3933 strcpy (relname, ".rela");
3934 strcat (relname, secname);
3936 s = bfd_make_section_with_flags (abfd, relname,
3937 flags | SEC_READONLY);
3939 || ! bfd_set_section_alignment (abfd, s, ptralign))
3944 if (bed->want_dynbss)
3946 /* The .dynbss section is a place to put symbols which are defined
3947 by dynamic objects, are referenced by regular objects, and are
3948 not functions. We must allocate space for them in the process
3949 image and use a R_*_COPY reloc to tell the dynamic linker to
3950 initialize them at run time. The linker script puts the .dynbss
3951 section into the .bss section of the final image. */
3952 s = bfd_make_section_with_flags (abfd, ".dynbss",
3953 SEC_ALLOC | SEC_LINKER_CREATED);
3957 /* The .rel[a].bss section holds copy relocs. This section is not
3958 normally needed. We need to create it here, though, so that the
3959 linker will map it to an output section. We can't just create it
3960 only if we need it, because we will not know whether we need it
3961 until we have seen all the input files, and the first time the
3962 main linker code calls BFD after examining all the input files
3963 (size_dynamic_sections) the input sections have already been
3964 mapped to the output sections. If the section turns out not to
3965 be needed, we can discard it later. We will never need this
3966 section when generating a shared object, since they do not use
3970 s = bfd_make_section_with_flags (abfd,
3971 (bed->default_use_rela_p
3972 ? ".rela.bss" : ".rel.bss"),
3973 flags | SEC_READONLY);
3975 || ! bfd_set_section_alignment (abfd, s, ptralign))
3983 /* Adjust a symbol defined by a dynamic object and referenced by a
3984 regular object. The current definition is in some section of the
3985 dynamic object, but we're not including those sections. We have to
3986 change the definition to something the rest of the link can
3990 _bfd_mn10300_elf_adjust_dynamic_symbol (info, h)
3991 struct bfd_link_info * info;
3992 struct elf_link_hash_entry * h;
3996 unsigned int power_of_two;
3998 dynobj = elf_hash_table (info)->dynobj;
4000 /* Make sure we know what is going on here. */
4001 BFD_ASSERT (dynobj != NULL
4003 || h->u.weakdef != NULL
4006 && !h->def_regular)));
4008 /* If this is a function, put it in the procedure linkage table. We
4009 will fill in the contents of the procedure linkage table later,
4010 when we know the address of the .got section. */
4011 if (h->type == STT_FUNC
4018 /* This case can occur if we saw a PLT reloc in an input
4019 file, but the symbol was never referred to by a dynamic
4020 object. In such a case, we don't actually need to build
4021 a procedure linkage table, and we can just do a REL32
4023 BFD_ASSERT (h->needs_plt);
4027 /* Make sure this symbol is output as a dynamic symbol. */
4028 if (h->dynindx == -1)
4030 if (! bfd_elf_link_record_dynamic_symbol (info, h))
4034 s = bfd_get_section_by_name (dynobj, ".plt");
4035 BFD_ASSERT (s != NULL);
4037 /* If this is the first .plt entry, make room for the special
4040 s->size += elf_mn10300_sizeof_plt0 (info);
4042 /* If this symbol is not defined in a regular file, and we are
4043 not generating a shared library, then set the symbol to this
4044 location in the .plt. This is required to make function
4045 pointers compare as equal between the normal executable and
4046 the shared library. */
4050 h->root.u.def.section = s;
4051 h->root.u.def.value = s->size;
4054 h->plt.offset = s->size;
4056 /* Make room for this entry. */
4057 s->size += elf_mn10300_sizeof_plt (info);
4059 /* We also need to make an entry in the .got.plt section, which
4060 will be placed in the .got section by the linker script. */
4062 s = bfd_get_section_by_name (dynobj, ".got.plt");
4063 BFD_ASSERT (s != NULL);
4066 /* We also need to make an entry in the .rela.plt section. */
4068 s = bfd_get_section_by_name (dynobj, ".rela.plt");
4069 BFD_ASSERT (s != NULL);
4070 s->size += sizeof (Elf32_External_Rela);
4075 /* If this is a weak symbol, and there is a real definition, the
4076 processor independent code will have arranged for us to see the
4077 real definition first, and we can just use the same value. */
4078 if (h->u.weakdef != NULL)
4080 BFD_ASSERT (h->u.weakdef->root.type == bfd_link_hash_defined
4081 || h->u.weakdef->root.type == bfd_link_hash_defweak);
4082 h->root.u.def.section = h->u.weakdef->root.u.def.section;
4083 h->root.u.def.value = h->u.weakdef->root.u.def.value;
4087 /* This is a reference to a symbol defined by a dynamic object which
4088 is not a function. */
4090 /* If we are creating a shared library, we must presume that the
4091 only references to the symbol are via the global offset table.
4092 For such cases we need not do anything here; the relocations will
4093 be handled correctly by relocate_section. */
4097 /* If there are no references to this symbol that do not use the
4098 GOT, we don't need to generate a copy reloc. */
4099 if (!h->non_got_ref)
4102 /* We must allocate the symbol in our .dynbss section, which will
4103 become part of the .bss section of the executable. There will be
4104 an entry for this symbol in the .dynsym section. The dynamic
4105 object will contain position independent code, so all references
4106 from the dynamic object to this symbol will go through the global
4107 offset table. The dynamic linker will use the .dynsym entry to
4108 determine the address it must put in the global offset table, so
4109 both the dynamic object and the regular object will refer to the
4110 same memory location for the variable. */
4112 s = bfd_get_section_by_name (dynobj, ".dynbss");
4113 BFD_ASSERT (s != NULL);
4115 /* We must generate a R_MN10300_COPY reloc to tell the dynamic linker to
4116 copy the initial value out of the dynamic object and into the
4117 runtime process image. We need to remember the offset into the
4118 .rela.bss section we are going to use. */
4119 if ((h->root.u.def.section->flags & SEC_ALLOC) != 0)
4123 srel = bfd_get_section_by_name (dynobj, ".rela.bss");
4124 BFD_ASSERT (srel != NULL);
4125 srel->size += sizeof (Elf32_External_Rela);
4129 /* We need to figure out the alignment required for this symbol. I
4130 have no idea how ELF linkers handle this. */
4131 power_of_two = bfd_log2 (h->size);
4132 if (power_of_two > 3)
4135 /* Apply the required alignment. */
4136 s->size = BFD_ALIGN (s->size, (bfd_size_type) (1 << power_of_two));
4137 if (power_of_two > bfd_get_section_alignment (dynobj, s))
4139 if (! bfd_set_section_alignment (dynobj, s, power_of_two))
4143 /* Define the symbol as being at this point in the section. */
4144 h->root.u.def.section = s;
4145 h->root.u.def.value = s->size;
4147 /* Increment the section size to make room for the symbol. */
4153 /* Set the sizes of the dynamic sections. */
4156 _bfd_mn10300_elf_size_dynamic_sections (output_bfd, info)
4158 struct bfd_link_info * info;
4164 bfd_boolean reltext;
4166 dynobj = elf_hash_table (info)->dynobj;
4167 BFD_ASSERT (dynobj != NULL);
4169 if (elf_hash_table (info)->dynamic_sections_created)
4171 /* Set the contents of the .interp section to the interpreter. */
4172 if (info->executable)
4174 s = bfd_get_section_by_name (dynobj, ".interp");
4175 BFD_ASSERT (s != NULL);
4176 s->size = sizeof ELF_DYNAMIC_INTERPRETER;
4177 s->contents = (unsigned char *) ELF_DYNAMIC_INTERPRETER;
4182 /* We may have created entries in the .rela.got section.
4183 However, if we are not creating the dynamic sections, we will
4184 not actually use these entries. Reset the size of .rela.got,
4185 which will cause it to get stripped from the output file
4187 s = bfd_get_section_by_name (dynobj, ".rela.got");
4192 /* The check_relocs and adjust_dynamic_symbol entry points have
4193 determined the sizes of the various dynamic sections. Allocate
4198 for (s = dynobj->sections; s != NULL; s = s->next)
4202 if ((s->flags & SEC_LINKER_CREATED) == 0)
4205 /* It's OK to base decisions on the section name, because none
4206 of the dynobj section names depend upon the input files. */
4207 name = bfd_get_section_name (dynobj, s);
4209 if (strcmp (name, ".plt") == 0)
4211 /* Remember whether there is a PLT. */
4214 else if (strncmp (name, ".rela", 5) == 0)
4220 /* Remember whether there are any reloc sections other
4222 if (strcmp (name, ".rela.plt") != 0)
4224 const char * outname;
4228 /* If this relocation section applies to a read only
4229 section, then we probably need a DT_TEXTREL
4230 entry. The entries in the .rela.plt section
4231 really apply to the .got section, which we
4232 created ourselves and so know is not readonly. */
4233 outname = bfd_get_section_name (output_bfd,
4235 target = bfd_get_section_by_name (output_bfd, outname + 5);
4237 && (target->flags & SEC_READONLY) != 0
4238 && (target->flags & SEC_ALLOC) != 0)
4242 /* We use the reloc_count field as a counter if we need
4243 to copy relocs into the output file. */
4247 else if (strncmp (name, ".got", 4) != 0
4248 && strcmp (name, ".dynbss") != 0)
4249 /* It's not one of our sections, so don't allocate space. */
4254 /* If we don't need this section, strip it from the
4255 output file. This is mostly to handle .rela.bss and
4256 .rela.plt. We must create both sections in
4257 create_dynamic_sections, because they must be created
4258 before the linker maps input sections to output
4259 sections. The linker does that before
4260 adjust_dynamic_symbol is called, and it is that
4261 function which decides whether anything needs to go
4262 into these sections. */
4263 s->flags |= SEC_EXCLUDE;
4267 if ((s->flags & SEC_HAS_CONTENTS) == 0)
4270 /* Allocate memory for the section contents. We use bfd_zalloc
4271 here in case unused entries are not reclaimed before the
4272 section's contents are written out. This should not happen,
4273 but this way if it does, we get a R_MN10300_NONE reloc
4274 instead of garbage. */
4275 s->contents = (bfd_byte *) bfd_zalloc (dynobj, s->size);
4276 if (s->contents == NULL)
4280 if (elf_hash_table (info)->dynamic_sections_created)
4282 /* Add some entries to the .dynamic section. We fill in the
4283 values later, in _bfd_mn10300_elf_finish_dynamic_sections,
4284 but we must add the entries now so that we get the correct
4285 size for the .dynamic section. The DT_DEBUG entry is filled
4286 in by the dynamic linker and used by the debugger. */
4289 if (!_bfd_elf_add_dynamic_entry (info, DT_DEBUG, 0))
4295 if (!_bfd_elf_add_dynamic_entry (info, DT_PLTGOT, 0)
4296 || !_bfd_elf_add_dynamic_entry (info, DT_PLTRELSZ, 0)
4297 || !_bfd_elf_add_dynamic_entry (info, DT_PLTREL, DT_RELA)
4298 || !_bfd_elf_add_dynamic_entry (info, DT_JMPREL, 0))
4304 if (!_bfd_elf_add_dynamic_entry (info, DT_RELA, 0)
4305 || !_bfd_elf_add_dynamic_entry (info, DT_RELASZ, 0)
4306 || !_bfd_elf_add_dynamic_entry (info, DT_RELAENT,
4307 sizeof (Elf32_External_Rela)))
4313 if (!_bfd_elf_add_dynamic_entry (info, DT_TEXTREL, 0))
4321 /* Finish up dynamic symbol handling. We set the contents of various
4322 dynamic sections here. */
4325 _bfd_mn10300_elf_finish_dynamic_symbol (output_bfd, info, h, sym)
4327 struct bfd_link_info * info;
4328 struct elf_link_hash_entry * h;
4329 Elf_Internal_Sym * sym;
4333 dynobj = elf_hash_table (info)->dynobj;
4335 if (h->plt.offset != (bfd_vma) -1)
4342 Elf_Internal_Rela rel;
4344 /* This symbol has an entry in the procedure linkage table. Set
4347 BFD_ASSERT (h->dynindx != -1);
4349 splt = bfd_get_section_by_name (dynobj, ".plt");
4350 sgot = bfd_get_section_by_name (dynobj, ".got.plt");
4351 srel = bfd_get_section_by_name (dynobj, ".rela.plt");
4352 BFD_ASSERT (splt != NULL && sgot != NULL && srel != NULL);
4354 /* Get the index in the procedure linkage table which
4355 corresponds to this symbol. This is the index of this symbol
4356 in all the symbols for which we are making plt entries. The
4357 first entry in the procedure linkage table is reserved. */
4358 plt_index = ((h->plt.offset - elf_mn10300_sizeof_plt0 (info))
4359 / elf_mn10300_sizeof_plt (info));
4361 /* Get the offset into the .got table of the entry that
4362 corresponds to this function. Each .got entry is 4 bytes.
4363 The first three are reserved. */
4364 got_offset = (plt_index + 3) * 4;
4366 /* Fill in the entry in the procedure linkage table. */
4369 memcpy (splt->contents + h->plt.offset, elf_mn10300_plt_entry,
4370 elf_mn10300_sizeof_plt (info));
4371 bfd_put_32 (output_bfd,
4372 (sgot->output_section->vma
4373 + sgot->output_offset
4375 (splt->contents + h->plt.offset
4376 + elf_mn10300_plt_symbol_offset (info)));
4378 bfd_put_32 (output_bfd,
4379 (1 - h->plt.offset - elf_mn10300_plt_plt0_offset (info)),
4380 (splt->contents + h->plt.offset
4381 + elf_mn10300_plt_plt0_offset (info)));
4385 memcpy (splt->contents + h->plt.offset, elf_mn10300_pic_plt_entry,
4386 elf_mn10300_sizeof_plt (info));
4388 bfd_put_32 (output_bfd, got_offset,
4389 (splt->contents + h->plt.offset
4390 + elf_mn10300_plt_symbol_offset (info)));
4393 bfd_put_32 (output_bfd, plt_index * sizeof (Elf32_External_Rela),
4394 (splt->contents + h->plt.offset
4395 + elf_mn10300_plt_reloc_offset (info)));
4397 /* Fill in the entry in the global offset table. */
4398 bfd_put_32 (output_bfd,
4399 (splt->output_section->vma
4400 + splt->output_offset
4402 + elf_mn10300_plt_temp_offset (info)),
4403 sgot->contents + got_offset);
4405 /* Fill in the entry in the .rela.plt section. */
4406 rel.r_offset = (sgot->output_section->vma
4407 + sgot->output_offset
4409 rel.r_info = ELF32_R_INFO (h->dynindx, R_MN10300_JMP_SLOT);
4411 bfd_elf32_swap_reloca_out (output_bfd, &rel,
4412 (bfd_byte *) ((Elf32_External_Rela *) srel->contents
4415 if (!h->def_regular)
4416 /* Mark the symbol as undefined, rather than as defined in
4417 the .plt section. Leave the value alone. */
4418 sym->st_shndx = SHN_UNDEF;
4421 if (h->got.offset != (bfd_vma) -1)
4425 Elf_Internal_Rela rel;
4427 /* This symbol has an entry in the global offset table. Set it up. */
4429 sgot = bfd_get_section_by_name (dynobj, ".got");
4430 srel = bfd_get_section_by_name (dynobj, ".rela.got");
4431 BFD_ASSERT (sgot != NULL && srel != NULL);
4433 rel.r_offset = (sgot->output_section->vma
4434 + sgot->output_offset
4435 + (h->got.offset &~ 1));
4437 /* If this is a -Bsymbolic link, and the symbol is defined
4438 locally, we just want to emit a RELATIVE reloc. Likewise if
4439 the symbol was forced to be local because of a version file.
4440 The entry in the global offset table will already have been
4441 initialized in the relocate_section function. */
4443 && (info->symbolic || h->dynindx == -1)
4446 rel.r_info = ELF32_R_INFO (0, R_MN10300_RELATIVE);
4447 rel.r_addend = (h->root.u.def.value
4448 + h->root.u.def.section->output_section->vma
4449 + h->root.u.def.section->output_offset);
4453 bfd_put_32 (output_bfd, (bfd_vma) 0, sgot->contents + h->got.offset);
4454 rel.r_info = ELF32_R_INFO (h->dynindx, R_MN10300_GLOB_DAT);
4458 bfd_elf32_swap_reloca_out (output_bfd, &rel,
4459 (bfd_byte *) ((Elf32_External_Rela *) srel->contents
4460 + srel->reloc_count));
4461 ++ srel->reloc_count;
4467 Elf_Internal_Rela rel;
4469 /* This symbol needs a copy reloc. Set it up. */
4470 BFD_ASSERT (h->dynindx != -1
4471 && (h->root.type == bfd_link_hash_defined
4472 || h->root.type == bfd_link_hash_defweak));
4474 s = bfd_get_section_by_name (h->root.u.def.section->owner,
4476 BFD_ASSERT (s != NULL);
4478 rel.r_offset = (h->root.u.def.value
4479 + h->root.u.def.section->output_section->vma
4480 + h->root.u.def.section->output_offset);
4481 rel.r_info = ELF32_R_INFO (h->dynindx, R_MN10300_COPY);
4483 bfd_elf32_swap_reloca_out (output_bfd, &rel,
4484 (bfd_byte *) ((Elf32_External_Rela *) s->contents
4489 /* Mark _DYNAMIC and _GLOBAL_OFFSET_TABLE_ as absolute. */
4490 if (strcmp (h->root.root.string, "_DYNAMIC") == 0
4491 || strcmp (h->root.root.string, "_GLOBAL_OFFSET_TABLE_") == 0)
4492 sym->st_shndx = SHN_ABS;
4497 /* Finish up the dynamic sections. */
4500 _bfd_mn10300_elf_finish_dynamic_sections (output_bfd, info)
4502 struct bfd_link_info * info;
4508 dynobj = elf_hash_table (info)->dynobj;
4510 sgot = bfd_get_section_by_name (dynobj, ".got.plt");
4511 BFD_ASSERT (sgot != NULL);
4512 sdyn = bfd_get_section_by_name (dynobj, ".dynamic");
4514 if (elf_hash_table (info)->dynamic_sections_created)
4517 Elf32_External_Dyn * dyncon;
4518 Elf32_External_Dyn * dynconend;
4520 BFD_ASSERT (sdyn != NULL);
4522 dyncon = (Elf32_External_Dyn *) sdyn->contents;
4523 dynconend = (Elf32_External_Dyn *) (sdyn->contents + sdyn->size);
4525 for (; dyncon < dynconend; dyncon++)
4527 Elf_Internal_Dyn dyn;
4531 bfd_elf32_swap_dyn_in (dynobj, dyncon, &dyn);
4545 s = bfd_get_section_by_name (output_bfd, name);
4546 BFD_ASSERT (s != NULL);
4547 dyn.d_un.d_ptr = s->vma;
4548 bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon);
4552 s = bfd_get_section_by_name (output_bfd, ".rela.plt");
4553 BFD_ASSERT (s != NULL);
4554 dyn.d_un.d_val = s->size;
4555 bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon);
4559 /* My reading of the SVR4 ABI indicates that the
4560 procedure linkage table relocs (DT_JMPREL) should be
4561 included in the overall relocs (DT_RELA). This is
4562 what Solaris does. However, UnixWare can not handle
4563 that case. Therefore, we override the DT_RELASZ entry
4564 here to make it not include the JMPREL relocs. Since
4565 the linker script arranges for .rela.plt to follow all
4566 other relocation sections, we don't have to worry
4567 about changing the DT_RELA entry. */
4568 s = bfd_get_section_by_name (output_bfd, ".rela.plt");
4570 dyn.d_un.d_val -= s->size;
4571 bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon);
4576 /* Fill in the first entry in the procedure linkage table. */
4577 splt = bfd_get_section_by_name (dynobj, ".plt");
4578 if (splt && splt->size > 0)
4582 memcpy (splt->contents, elf_mn10300_pic_plt_entry,
4583 elf_mn10300_sizeof_plt (info));
4587 memcpy (splt->contents, elf_mn10300_plt0_entry, PLT0_ENTRY_SIZE);
4588 bfd_put_32 (output_bfd,
4589 sgot->output_section->vma + sgot->output_offset + 4,
4590 splt->contents + elf_mn10300_plt0_gotid_offset (info));
4591 bfd_put_32 (output_bfd,
4592 sgot->output_section->vma + sgot->output_offset + 8,
4593 splt->contents + elf_mn10300_plt0_linker_offset (info));
4596 /* UnixWare sets the entsize of .plt to 4, although that doesn't
4597 really seem like the right value. */
4598 elf_section_data (splt->output_section)->this_hdr.sh_entsize = 4;
4602 /* Fill in the first three entries in the global offset table. */
4606 bfd_put_32 (output_bfd, (bfd_vma) 0, sgot->contents);
4608 bfd_put_32 (output_bfd,
4609 sdyn->output_section->vma + sdyn->output_offset,
4611 bfd_put_32 (output_bfd, (bfd_vma) 0, sgot->contents + 4);
4612 bfd_put_32 (output_bfd, (bfd_vma) 0, sgot->contents + 8);
4615 elf_section_data (sgot->output_section)->this_hdr.sh_entsize = 4;
4620 /* Classify relocation types, such that combreloc can sort them
4623 static enum elf_reloc_type_class
4624 _bfd_mn10300_elf_reloc_type_class (const Elf_Internal_Rela *rela)
4626 switch ((int) ELF32_R_TYPE (rela->r_info))
4628 case R_MN10300_RELATIVE:
4629 return reloc_class_relative;
4630 case R_MN10300_JMP_SLOT:
4631 return reloc_class_plt;
4632 case R_MN10300_COPY:
4633 return reloc_class_copy;
4635 return reloc_class_normal;
4640 #define TARGET_LITTLE_SYM bfd_elf32_mn10300_vec
4641 #define TARGET_LITTLE_NAME "elf32-mn10300"
4642 #define ELF_ARCH bfd_arch_mn10300
4643 #define ELF_MACHINE_CODE EM_MN10300
4644 #define ELF_MACHINE_ALT1 EM_CYGNUS_MN10300
4645 #define ELF_MAXPAGESIZE 0x1000
4648 #define elf_info_to_howto mn10300_info_to_howto
4649 #define elf_info_to_howto_rel 0
4650 #define elf_backend_can_gc_sections 1
4651 #define elf_backend_rela_normal 1
4652 #define elf_backend_check_relocs mn10300_elf_check_relocs
4653 #define elf_backend_gc_mark_hook mn10300_elf_gc_mark_hook
4654 #define elf_backend_relocate_section mn10300_elf_relocate_section
4655 #define bfd_elf32_bfd_relax_section mn10300_elf_relax_section
4656 #define bfd_elf32_bfd_get_relocated_section_contents \
4657 mn10300_elf_get_relocated_section_contents
4658 #define bfd_elf32_bfd_link_hash_table_create \
4659 elf32_mn10300_link_hash_table_create
4660 #define bfd_elf32_bfd_link_hash_table_free \
4661 elf32_mn10300_link_hash_table_free
4663 #ifndef elf_symbol_leading_char
4664 #define elf_symbol_leading_char '_'
4667 /* So we can set bits in e_flags. */
4668 #define elf_backend_final_write_processing \
4669 _bfd_mn10300_elf_final_write_processing
4670 #define elf_backend_object_p _bfd_mn10300_elf_object_p
4672 #define bfd_elf32_bfd_merge_private_bfd_data \
4673 _bfd_mn10300_elf_merge_private_bfd_data
4675 #define elf_backend_can_gc_sections 1
4676 #define elf_backend_create_dynamic_sections \
4677 _bfd_mn10300_elf_create_dynamic_sections
4678 #define elf_backend_adjust_dynamic_symbol \
4679 _bfd_mn10300_elf_adjust_dynamic_symbol
4680 #define elf_backend_size_dynamic_sections \
4681 _bfd_mn10300_elf_size_dynamic_sections
4682 #define elf_backend_finish_dynamic_symbol \
4683 _bfd_mn10300_elf_finish_dynamic_symbol
4684 #define elf_backend_finish_dynamic_sections \
4685 _bfd_mn10300_elf_finish_dynamic_sections
4687 #define elf_backend_reloc_type_class \
4688 _bfd_mn10300_elf_reloc_type_class
4690 #define elf_backend_want_got_plt 1
4691 #define elf_backend_plt_readonly 1
4692 #define elf_backend_want_plt_sym 0
4693 #define elf_backend_got_header_size 12
4695 #include "elf32-target.h"