1 /* BFD back-end for National Semiconductor's CR16 ELF
2 Copyright (C) 2007-2016 Free Software Foundation, Inc.
3 Written by M R Swami Reddy.
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 3 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 Foundation,
19 Inc., 51 Franklin Street - Fifth Floor, Boston, MA 02110-1301, USA. */
25 #include "libiberty.h"
29 /* The cr16 linker needs to keep track of the number of relocs that
30 it decides to copy in check_relocs for each symbol. This is so
31 that it can discard PC relative relocs if it doesn't need them when
32 linking with -Bsymbolic. We store the information in a field
33 extending the regular ELF linker hash table. */
35 struct elf32_cr16_link_hash_entry
37 /* The basic elf link hash table entry. */
38 struct elf_link_hash_entry root;
40 /* For function symbols, the number of times this function is
41 called directly (ie by name). */
42 unsigned int direct_calls;
44 /* For function symbols, the size of this function's stack
45 (if <= 255 bytes). We stuff this into "call" instructions
46 to this target when it's valid and profitable to do so.
48 This does not include stack allocated by movm! */
49 unsigned char stack_size;
51 /* For function symbols, arguments (if any) for movm instruction
52 in the prologue. We stuff this value into "call" instructions
53 to the target when it's valid and profitable to do so. */
54 unsigned char movm_args;
56 /* For function symbols, the amount of stack space that would be allocated
57 by the movm instruction. This is redundant with movm_args, but we
58 add it to the hash table to avoid computing it over and over. */
59 unsigned char movm_stack_size;
61 /* Used to mark functions which have had redundant parts of their
63 #define CR16_DELETED_PROLOGUE_BYTES 0x1
66 /* Calculated value. */
70 /* cr16_reloc_map array maps BFD relocation enum into a CRGAS relocation type. */
74 bfd_reloc_code_real_type bfd_reloc_enum; /* BFD relocation enum. */
75 unsigned short cr16_reloc_type; /* CR16 relocation type. */
78 static const struct cr16_reloc_map cr16_reloc_map[R_CR16_MAX] =
80 {BFD_RELOC_NONE, R_CR16_NONE},
81 {BFD_RELOC_CR16_NUM8, R_CR16_NUM8},
82 {BFD_RELOC_CR16_NUM16, R_CR16_NUM16},
83 {BFD_RELOC_CR16_NUM32, R_CR16_NUM32},
84 {BFD_RELOC_CR16_NUM32a, R_CR16_NUM32a},
85 {BFD_RELOC_CR16_REGREL4, R_CR16_REGREL4},
86 {BFD_RELOC_CR16_REGREL4a, R_CR16_REGREL4a},
87 {BFD_RELOC_CR16_REGREL14, R_CR16_REGREL14},
88 {BFD_RELOC_CR16_REGREL14a, R_CR16_REGREL14a},
89 {BFD_RELOC_CR16_REGREL16, R_CR16_REGREL16},
90 {BFD_RELOC_CR16_REGREL20, R_CR16_REGREL20},
91 {BFD_RELOC_CR16_REGREL20a, R_CR16_REGREL20a},
92 {BFD_RELOC_CR16_ABS20, R_CR16_ABS20},
93 {BFD_RELOC_CR16_ABS24, R_CR16_ABS24},
94 {BFD_RELOC_CR16_IMM4, R_CR16_IMM4},
95 {BFD_RELOC_CR16_IMM8, R_CR16_IMM8},
96 {BFD_RELOC_CR16_IMM16, R_CR16_IMM16},
97 {BFD_RELOC_CR16_IMM20, R_CR16_IMM20},
98 {BFD_RELOC_CR16_IMM24, R_CR16_IMM24},
99 {BFD_RELOC_CR16_IMM32, R_CR16_IMM32},
100 {BFD_RELOC_CR16_IMM32a, R_CR16_IMM32a},
101 {BFD_RELOC_CR16_DISP4, R_CR16_DISP4},
102 {BFD_RELOC_CR16_DISP8, R_CR16_DISP8},
103 {BFD_RELOC_CR16_DISP16, R_CR16_DISP16},
104 {BFD_RELOC_CR16_DISP24, R_CR16_DISP24},
105 {BFD_RELOC_CR16_DISP24a, R_CR16_DISP24a},
106 {BFD_RELOC_CR16_SWITCH8, R_CR16_SWITCH8},
107 {BFD_RELOC_CR16_SWITCH16, R_CR16_SWITCH16},
108 {BFD_RELOC_CR16_SWITCH32, R_CR16_SWITCH32},
109 {BFD_RELOC_CR16_GOT_REGREL20, R_CR16_GOT_REGREL20},
110 {BFD_RELOC_CR16_GOTC_REGREL20, R_CR16_GOTC_REGREL20},
111 {BFD_RELOC_CR16_GLOB_DAT, R_CR16_GLOB_DAT}
114 static reloc_howto_type cr16_elf_howto_table[] =
116 HOWTO (R_CR16_NONE, /* type */
120 FALSE, /* pc_relative */
122 complain_overflow_dont, /* complain_on_overflow */
123 bfd_elf_generic_reloc, /* special_function */
124 "R_CR16_NONE", /* name */
125 FALSE, /* partial_inplace */
128 FALSE), /* pcrel_offset */
130 HOWTO (R_CR16_NUM8, /* type */
134 FALSE, /* pc_relative */
136 complain_overflow_bitfield,/* complain_on_overflow */
137 bfd_elf_generic_reloc, /* special_function */
138 "R_CR16_NUM8", /* name */
139 FALSE, /* partial_inplace */
142 FALSE), /* pcrel_offset */
144 HOWTO (R_CR16_NUM16, /* type */
148 FALSE, /* pc_relative */
150 complain_overflow_bitfield,/* complain_on_overflow */
151 bfd_elf_generic_reloc, /* special_function */
152 "R_CR16_NUM16", /* name */
153 FALSE, /* partial_inplace */
155 0xffff, /* dst_mask */
156 FALSE), /* pcrel_offset */
158 HOWTO (R_CR16_NUM32, /* type */
162 FALSE, /* pc_relative */
164 complain_overflow_bitfield,/* complain_on_overflow */
165 bfd_elf_generic_reloc, /* special_function */
166 "R_CR16_NUM32", /* name */
167 FALSE, /* partial_inplace */
169 0xffffffff, /* dst_mask */
170 FALSE), /* pcrel_offset */
172 HOWTO (R_CR16_NUM32a, /* type */
176 FALSE, /* pc_relative */
178 complain_overflow_bitfield,/* complain_on_overflow */
179 bfd_elf_generic_reloc, /* special_function */
180 "R_CR16_NUM32a", /* name */
181 FALSE, /* partial_inplace */
183 0xffffffff, /* dst_mask */
184 FALSE), /* pcrel_offset */
186 HOWTO (R_CR16_REGREL4, /* type */
190 FALSE, /* pc_relative */
192 complain_overflow_bitfield,/* complain_on_overflow */
193 bfd_elf_generic_reloc, /* special_function */
194 "R_CR16_REGREL4", /* name */
195 FALSE, /* partial_inplace */
198 FALSE), /* pcrel_offset */
200 HOWTO (R_CR16_REGREL4a, /* type */
204 FALSE, /* pc_relative */
206 complain_overflow_bitfield,/* complain_on_overflow */
207 bfd_elf_generic_reloc, /* special_function */
208 "R_CR16_REGREL4a", /* name */
209 FALSE, /* partial_inplace */
212 FALSE), /* pcrel_offset */
214 HOWTO (R_CR16_REGREL14, /* type */
218 FALSE, /* pc_relative */
220 complain_overflow_bitfield,/* complain_on_overflow */
221 bfd_elf_generic_reloc, /* special_function */
222 "R_CR16_REGREL14", /* name */
223 FALSE, /* partial_inplace */
225 0x3fff, /* dst_mask */
226 FALSE), /* pcrel_offset */
228 HOWTO (R_CR16_REGREL14a, /* type */
232 FALSE, /* pc_relative */
234 complain_overflow_bitfield,/* complain_on_overflow */
235 bfd_elf_generic_reloc, /* special_function */
236 "R_CR16_REGREL14a", /* name */
237 FALSE, /* partial_inplace */
239 0x3fff, /* dst_mask */
240 FALSE), /* pcrel_offset */
242 HOWTO (R_CR16_REGREL16, /* type */
246 FALSE, /* pc_relative */
248 complain_overflow_bitfield,/* complain_on_overflow */
249 bfd_elf_generic_reloc, /* special_function */
250 "R_CR16_REGREL16", /* name */
251 FALSE, /* partial_inplace */
253 0xffff, /* dst_mask */
254 FALSE), /* pcrel_offset */
256 HOWTO (R_CR16_REGREL20, /* type */
260 FALSE, /* pc_relative */
262 complain_overflow_bitfield,/* complain_on_overflow */
263 bfd_elf_generic_reloc, /* special_function */
264 "R_CR16_REGREL20", /* name */
265 FALSE, /* partial_inplace */
267 0xfffff, /* dst_mask */
268 FALSE), /* pcrel_offset */
270 HOWTO (R_CR16_REGREL20a, /* type */
274 FALSE, /* pc_relative */
276 complain_overflow_bitfield,/* complain_on_overflow */
277 bfd_elf_generic_reloc, /* special_function */
278 "R_CR16_REGREL20a", /* name */
279 FALSE, /* partial_inplace */
281 0xfffff, /* dst_mask */
282 FALSE), /* pcrel_offset */
284 HOWTO (R_CR16_ABS20, /* type */
288 FALSE, /* pc_relative */
290 complain_overflow_bitfield,/* complain_on_overflow */
291 bfd_elf_generic_reloc, /* special_function */
292 "R_CR16_ABS20", /* name */
293 FALSE, /* partial_inplace */
295 0xfffff, /* dst_mask */
296 FALSE), /* pcrel_offset */
298 HOWTO (R_CR16_ABS24, /* type */
302 FALSE, /* pc_relative */
304 complain_overflow_bitfield,/* complain_on_overflow */
305 bfd_elf_generic_reloc, /* special_function */
306 "R_CR16_ABS24", /* name */
307 FALSE, /* partial_inplace */
309 0xffffff, /* dst_mask */
310 FALSE), /* pcrel_offset */
312 HOWTO (R_CR16_IMM4, /* type */
316 FALSE, /* pc_relative */
318 complain_overflow_bitfield,/* complain_on_overflow */
319 bfd_elf_generic_reloc, /* special_function */
320 "R_CR16_IMM4", /* name */
321 FALSE, /* partial_inplace */
324 FALSE), /* pcrel_offset */
326 HOWTO (R_CR16_IMM8, /* type */
330 FALSE, /* pc_relative */
332 complain_overflow_bitfield,/* complain_on_overflow */
333 bfd_elf_generic_reloc, /* special_function */
334 "R_CR16_IMM8", /* name */
335 FALSE, /* partial_inplace */
338 FALSE), /* pcrel_offset */
340 HOWTO (R_CR16_IMM16, /* type */
344 FALSE, /* pc_relative */
346 complain_overflow_bitfield,/* complain_on_overflow */
347 bfd_elf_generic_reloc, /* special_function */
348 "R_CR16_IMM16", /* name */
349 FALSE, /* partial_inplace */
351 0xffff, /* dst_mask */
352 FALSE), /* pcrel_offset */
354 HOWTO (R_CR16_IMM20, /* type */
358 FALSE, /* pc_relative */
360 complain_overflow_bitfield,/* complain_on_overflow */
361 bfd_elf_generic_reloc, /* special_function */
362 "R_CR16_IMM20", /* name */
363 FALSE, /* partial_inplace */
365 0xfffff, /* dst_mask */
366 FALSE), /* pcrel_offset */
368 HOWTO (R_CR16_IMM24, /* type */
372 FALSE, /* pc_relative */
374 complain_overflow_bitfield,/* complain_on_overflow */
375 bfd_elf_generic_reloc, /* special_function */
376 "R_CR16_IMM24", /* name */
377 FALSE, /* partial_inplace */
379 0xffffff, /* dst_mask */
380 FALSE), /* pcrel_offset */
382 HOWTO (R_CR16_IMM32, /* type */
386 FALSE, /* pc_relative */
388 complain_overflow_bitfield,/* complain_on_overflow */
389 bfd_elf_generic_reloc, /* special_function */
390 "R_CR16_IMM32", /* name */
391 FALSE, /* partial_inplace */
393 0xffffffff, /* dst_mask */
394 FALSE), /* pcrel_offset */
396 HOWTO (R_CR16_IMM32a, /* type */
400 FALSE, /* pc_relative */
402 complain_overflow_bitfield,/* complain_on_overflow */
403 bfd_elf_generic_reloc, /* special_function */
404 "R_CR16_IMM32a", /* name */
405 FALSE, /* partial_inplace */
407 0xffffffff, /* dst_mask */
408 FALSE), /* pcrel_offset */
410 HOWTO (R_CR16_DISP4, /* type */
412 0, /* size (0 = byte, 1 = short, 2 = long) */
414 TRUE, /* pc_relative */
416 complain_overflow_unsigned, /* complain_on_overflow */
417 bfd_elf_generic_reloc, /* special_function */
418 "R_CR16_DISP4", /* name */
419 FALSE, /* partial_inplace */
422 FALSE), /* pcrel_offset */
424 HOWTO (R_CR16_DISP8, /* type */
426 0, /* size (0 = byte, 1 = short, 2 = long) */
428 TRUE, /* pc_relative */
430 complain_overflow_unsigned, /* complain_on_overflow */
431 bfd_elf_generic_reloc, /* special_function */
432 "R_CR16_DISP8", /* name */
433 FALSE, /* partial_inplace */
435 0x1ff, /* dst_mask */
436 FALSE), /* pcrel_offset */
438 HOWTO (R_CR16_DISP16, /* type */
439 0, /* rightshift REVIITS: To sync with WinIDEA*/
440 1, /* size (0 = byte, 1 = short, 2 = long) */
442 TRUE, /* pc_relative */
444 complain_overflow_unsigned, /* complain_on_overflow */
445 bfd_elf_generic_reloc, /* special_function */
446 "R_CR16_DISP16", /* name */
447 FALSE, /* partial_inplace */
449 0x1ffff, /* dst_mask */
450 FALSE), /* pcrel_offset */
451 /* REVISIT: DISP24 should be left-shift by 2 as per ISA doc
452 but its not done, to sync with WinIDEA and CR16 4.1 tools */
453 HOWTO (R_CR16_DISP24, /* type */
455 2, /* size (0 = byte, 1 = short, 2 = long) */
457 TRUE, /* pc_relative */
459 complain_overflow_unsigned, /* complain_on_overflow */
460 bfd_elf_generic_reloc, /* special_function */
461 "R_CR16_DISP24", /* name */
462 FALSE, /* partial_inplace */
464 0x1ffffff, /* dst_mask */
465 FALSE), /* pcrel_offset */
467 HOWTO (R_CR16_DISP24a, /* type */
469 2, /* size (0 = byte, 1 = short, 2 = long) */
471 TRUE, /* pc_relative */
473 complain_overflow_unsigned, /* complain_on_overflow */
474 bfd_elf_generic_reloc, /* special_function */
475 "R_CR16_DISP24a", /* name */
476 FALSE, /* partial_inplace */
478 0xffffff, /* dst_mask */
479 FALSE), /* pcrel_offset */
481 /* An 8 bit switch table entry. This is generated for an expression
482 such as ``.byte L1 - L2''. The offset holds the difference
483 between the reloc address and L2. */
484 HOWTO (R_CR16_SWITCH8, /* type */
486 0, /* size (0 = byte, 1 = short, 2 = long) */
488 FALSE, /* pc_relative */
490 complain_overflow_unsigned, /* complain_on_overflow */
491 bfd_elf_generic_reloc, /* special_function */
492 "R_CR16_SWITCH8", /* name */
493 FALSE, /* partial_inplace */
496 TRUE), /* pcrel_offset */
498 /* A 16 bit switch table entry. This is generated for an expression
499 such as ``.word L1 - L2''. The offset holds the difference
500 between the reloc address and L2. */
501 HOWTO (R_CR16_SWITCH16, /* type */
503 1, /* size (0 = byte, 1 = short, 2 = long) */
505 FALSE, /* pc_relative */
507 complain_overflow_unsigned, /* complain_on_overflow */
508 bfd_elf_generic_reloc, /* special_function */
509 "R_CR16_SWITCH16", /* name */
510 FALSE, /* partial_inplace */
512 0xffff, /* dst_mask */
513 TRUE), /* pcrel_offset */
515 /* A 32 bit switch table entry. This is generated for an expression
516 such as ``.long L1 - L2''. The offset holds the difference
517 between the reloc address and L2. */
518 HOWTO (R_CR16_SWITCH32, /* type */
520 2, /* size (0 = byte, 1 = short, 2 = long) */
522 FALSE, /* pc_relative */
524 complain_overflow_unsigned, /* complain_on_overflow */
525 bfd_elf_generic_reloc, /* special_function */
526 "R_CR16_SWITCH32", /* name */
527 FALSE, /* partial_inplace */
529 0xffffffff, /* dst_mask */
530 TRUE), /* pcrel_offset */
532 HOWTO (R_CR16_GOT_REGREL20, /* type */
536 FALSE, /* pc_relative */
538 complain_overflow_bitfield,/* complain_on_overflow */
539 bfd_elf_generic_reloc, /* special_function */
540 "R_CR16_GOT_REGREL20", /* name */
541 TRUE, /* partial_inplace */
543 0xfffff, /* dst_mask */
544 FALSE), /* pcrel_offset */
546 HOWTO (R_CR16_GOTC_REGREL20, /* type */
550 FALSE, /* pc_relative */
552 complain_overflow_bitfield,/* complain_on_overflow */
553 bfd_elf_generic_reloc, /* special_function */
554 "R_CR16_GOTC_REGREL20", /* name */
555 TRUE, /* partial_inplace */
557 0xfffff, /* dst_mask */
558 FALSE), /* pcrel_offset */
560 HOWTO (R_CR16_GLOB_DAT, /* type */
562 2, /* size (0 = byte, 1 = short, 2 = long) */
564 FALSE, /* pc_relative */
566 complain_overflow_unsigned, /* complain_on_overflow */
567 bfd_elf_generic_reloc, /* special_function */
568 "R_CR16_GLOB_DAT", /* name */
569 FALSE, /* partial_inplace */
571 0xffffffff, /* dst_mask */
572 TRUE) /* pcrel_offset */
576 /* Create the GOT section. */
579 _bfd_cr16_elf_create_got_section (bfd * abfd, struct bfd_link_info * info)
583 struct elf_link_hash_entry * h;
584 const struct elf_backend_data * bed = get_elf_backend_data (abfd);
587 /* This function may be called more than once. */
588 if (bfd_get_linker_section (abfd, ".got") != NULL)
591 switch (bed->s->arch_size)
602 bfd_set_error (bfd_error_bad_value);
606 flags = (SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS | SEC_IN_MEMORY
607 | SEC_LINKER_CREATED);
609 s = bfd_make_section_anyway_with_flags (abfd, ".got", flags);
611 || ! bfd_set_section_alignment (abfd, s, ptralign))
614 if (bed->want_got_plt)
616 s = bfd_make_section_anyway_with_flags (abfd, ".got.plt", flags);
618 || ! bfd_set_section_alignment (abfd, s, ptralign))
622 /* Define the symbol _GLOBAL_OFFSET_TABLE_ at the start of the .got
623 (or .got.plt) section. We don't do this in the linker script
624 because we don't want to define the symbol if we are not creating
625 a global offset table. */
626 h = _bfd_elf_define_linkage_sym (abfd, info, s, "_GLOBAL_OFFSET_TABLE_");
627 elf_hash_table (info)->hgot = h;
631 /* The first bit of the global offset table is the header. */
632 s->size += bed->got_header_size;
638 /* Retrieve a howto ptr using a BFD reloc_code. */
640 static reloc_howto_type *
641 elf_cr16_reloc_type_lookup (bfd *abfd ATTRIBUTE_UNUSED,
642 bfd_reloc_code_real_type code)
646 for (i = 0; i < R_CR16_MAX; i++)
647 if (code == cr16_reloc_map[i].bfd_reloc_enum)
648 return &cr16_elf_howto_table[cr16_reloc_map[i].cr16_reloc_type];
650 _bfd_error_handler ("Unsupported CR16 relocation type: 0x%x\n", code);
654 static reloc_howto_type *
655 elf_cr16_reloc_name_lookup (bfd *abfd ATTRIBUTE_UNUSED,
660 for (i = 0; ARRAY_SIZE (cr16_elf_howto_table); i++)
661 if (cr16_elf_howto_table[i].name != NULL
662 && strcasecmp (cr16_elf_howto_table[i].name, r_name) == 0)
663 return cr16_elf_howto_table + i;
668 /* Retrieve a howto ptr using an internal relocation entry. */
671 elf_cr16_info_to_howto (bfd *abfd ATTRIBUTE_UNUSED, arelent *cache_ptr,
672 Elf_Internal_Rela *dst)
674 unsigned int r_type = ELF32_R_TYPE (dst->r_info);
676 if (r_type >= R_CR16_MAX)
678 (*_bfd_error_handler) (_("%B: unrecognised CR16 reloc number: %d"),
680 bfd_set_error (bfd_error_bad_value);
681 r_type = R_CR16_NONE;
683 cache_ptr->howto = cr16_elf_howto_table + r_type;
686 /* Look through the relocs for a section during the first phase.
687 Since we don't do .gots or .plts, we just need to consider the
688 virtual table relocs for gc. */
691 cr16_elf_check_relocs (bfd *abfd, struct bfd_link_info *info, asection *sec,
692 const Elf_Internal_Rela *relocs)
694 Elf_Internal_Shdr *symtab_hdr;
695 Elf_Internal_Sym * isymbuf = NULL;
696 struct elf_link_hash_entry **sym_hashes, **sym_hashes_end;
697 const Elf_Internal_Rela *rel;
698 const Elf_Internal_Rela *rel_end;
700 bfd_vma * local_got_offsets;
706 bfd_boolean result = FALSE;
708 if (bfd_link_relocatable (info))
711 symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
712 sym_hashes = elf_sym_hashes (abfd);
713 sym_hashes_end = sym_hashes + symtab_hdr->sh_size/sizeof (Elf32_External_Sym);
714 if (!elf_bad_symtab (abfd))
715 sym_hashes_end -= symtab_hdr->sh_info;
717 dynobj = elf_hash_table (info)->dynobj;
718 local_got_offsets = elf_local_got_offsets (abfd);
719 rel_end = relocs + sec->reloc_count;
720 for (rel = relocs; rel < rel_end; rel++)
722 struct elf_link_hash_entry *h;
723 unsigned long r_symndx;
725 r_symndx = ELF32_R_SYM (rel->r_info);
726 if (r_symndx < symtab_hdr->sh_info)
730 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
731 while (h->root.type == bfd_link_hash_indirect
732 || h->root.type == bfd_link_hash_warning)
733 h = (struct elf_link_hash_entry *) h->root.u.i.link;
735 /* PR15323, ref flags aren't set for references in the same
737 h->root.non_ir_ref = 1;
740 /* Some relocs require a global offset table. */
743 switch (ELF32_R_TYPE (rel->r_info))
745 case R_CR16_GOT_REGREL20:
746 case R_CR16_GOTC_REGREL20:
747 elf_hash_table (info)->dynobj = dynobj = abfd;
748 if (! _bfd_cr16_elf_create_got_section (dynobj, info))
757 switch (ELF32_R_TYPE (rel->r_info))
759 case R_CR16_GOT_REGREL20:
760 case R_CR16_GOTC_REGREL20:
761 /* This symbol requires a global offset table entry. */
765 sgot = bfd_get_linker_section (dynobj, ".got");
766 BFD_ASSERT (sgot != NULL);
770 && (h != NULL || bfd_link_executable (info)))
772 srelgot = bfd_get_linker_section (dynobj, ".rela.got");
775 flagword flags = (SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS
776 | SEC_IN_MEMORY | SEC_LINKER_CREATED
778 srelgot = bfd_make_section_anyway_with_flags (dynobj,
782 || ! bfd_set_section_alignment (dynobj, srelgot, 2))
789 if (h->got.offset != (bfd_vma) -1)
790 /* We have already allocated space in the .got. */
793 h->got.offset = sgot->size;
795 /* Make sure this symbol is output as a dynamic symbol. */
796 if (h->dynindx == -1)
798 if (! bfd_elf_link_record_dynamic_symbol (info, h))
802 srelgot->size += sizeof (Elf32_External_Rela);
806 /* This is a global offset table entry for a local
808 if (local_got_offsets == NULL)
813 size = symtab_hdr->sh_info * sizeof (bfd_vma);
814 local_got_offsets = (bfd_vma *) bfd_alloc (abfd, size);
816 if (local_got_offsets == NULL)
819 elf_local_got_offsets (abfd) = local_got_offsets;
821 for (i = 0; i < symtab_hdr->sh_info; i++)
822 local_got_offsets[i] = (bfd_vma) -1;
825 if (local_got_offsets[r_symndx] != (bfd_vma) -1)
826 /* We have already allocated space in the .got. */
829 local_got_offsets[r_symndx] = sgot->size;
831 if (bfd_link_executable (info))
832 /* If we are generating a shared object, we need to
833 output a R_CR16_RELATIVE reloc so that the dynamic
834 linker can adjust this GOT entry. */
835 srelgot->size += sizeof (Elf32_External_Rela);
852 /* Perform a relocation as part of a final link. */
854 static bfd_reloc_status_type
855 cr16_elf_final_link_relocate (reloc_howto_type *howto,
857 bfd *output_bfd ATTRIBUTE_UNUSED,
858 asection *input_section,
863 struct elf_link_hash_entry * h,
864 unsigned long symndx ATTRIBUTE_UNUSED,
865 struct bfd_link_info *info ATTRIBUTE_UNUSED,
866 asection *sec ATTRIBUTE_UNUSED,
867 int is_local ATTRIBUTE_UNUSED)
869 unsigned short r_type = howto->type;
870 bfd_byte *hit_data = contents + offset;
871 bfd_vma reloc_bits, check, Rvalue1;
874 dynobj = elf_hash_table (info)->dynobj;
888 case R_CR16_REGREL4a:
889 case R_CR16_REGREL14:
890 case R_CR16_REGREL14a:
891 case R_CR16_REGREL16:
892 case R_CR16_REGREL20:
893 case R_CR16_REGREL20a:
894 case R_CR16_GOT_REGREL20:
895 case R_CR16_GOTC_REGREL20:
899 /* 'hit_data' is relative to the start of the instruction, not the
900 relocation offset. Advance it to account for the exact offset. */
920 case R_CR16_SWITCH16:
921 case R_CR16_SWITCH32:
922 /* We only care about the addend, where the difference between
923 expressions is kept. */
930 if (howto->pc_relative)
932 /* Subtract the address of the section containing the location. */
933 Rvalue -= (input_section->output_section->vma
934 + input_section->output_offset);
935 /* Subtract the position of the location within the section. */
939 /* Add in supplied addend. */
942 /* Complain if the bitfield overflows, whether it is considered
943 as signed or unsigned. */
944 check = Rvalue >> howto->rightshift;
946 /* Assumes two's complement. This expression avoids
947 overflow if howto->bitsize is the number of bits in
949 reloc_bits = (((1 << (howto->bitsize - 1)) - 1) << 1) | 1;
951 /* For GOT and GOTC relocs no boundary checks applied. */
952 if (!((r_type == R_CR16_GOT_REGREL20)
953 || (r_type == R_CR16_GOTC_REGREL20)))
955 if (((bfd_vma) check & ~reloc_bits) != 0
956 && (((bfd_vma) check & ~reloc_bits)
957 != (-(bfd_vma) 1 & ~reloc_bits)))
959 /* The above right shift is incorrect for a signed
960 value. See if turning on the upper bits fixes the
962 if (howto->rightshift && (bfd_signed_vma) Rvalue < 0)
964 check |= ((bfd_vma) - 1
966 >> howto->rightshift));
968 if (((bfd_vma) check & ~reloc_bits)
969 != (-(bfd_vma) 1 & ~reloc_bits))
970 return bfd_reloc_overflow;
973 return bfd_reloc_overflow;
976 /* Drop unwanted bits from the value we are relocating to. */
977 Rvalue >>= (bfd_vma) howto->rightshift;
979 /* Apply dst_mask to select only relocatable part of the insn. */
980 Rvalue &= howto->dst_mask;
986 if (r_type == R_CR16_DISP8)
988 Rvalue1 = bfd_get_16 (input_bfd, hit_data);
989 Rvalue = ((Rvalue1 & 0xf000) | ((Rvalue << 4) & 0xf00)
990 | (Rvalue1 & 0x00f0) | (Rvalue & 0xf));
991 bfd_put_16 (input_bfd, Rvalue, hit_data);
993 else if (r_type == R_CR16_IMM4)
995 Rvalue1 = bfd_get_16 (input_bfd, hit_data);
996 Rvalue = (((Rvalue1 & 0xff) << 8) | ((Rvalue << 4) & 0xf0)
997 | ((Rvalue1 & 0x0f00) >> 8));
998 bfd_put_16 (input_bfd, Rvalue, hit_data);
1000 else if (r_type == R_CR16_DISP4)
1002 Rvalue1 = bfd_get_16 (input_bfd, hit_data);
1003 Rvalue = (Rvalue1 | ((Rvalue & 0xf) << 4));
1004 bfd_put_16 (input_bfd, Rvalue, hit_data);
1008 bfd_put_8 (input_bfd, (unsigned char) Rvalue, hit_data);
1013 if (r_type == R_CR16_DISP16)
1015 Rvalue |= (bfd_get_16 (input_bfd, hit_data));
1016 Rvalue = ((Rvalue & 0xfffe) | ((Rvalue >> 16) & 0x1));
1018 if (r_type == R_CR16_IMM16)
1020 Rvalue1 = bfd_get_16 (input_bfd, hit_data);
1022 /* Add or subtract the offset value. */
1023 if (Rvalue1 & 0x8000)
1024 Rvalue -= (~Rvalue1 + 1) & 0xffff;
1028 /* Check for range. */
1029 if ((long) Rvalue > 0xffff || (long) Rvalue < 0x0)
1030 return bfd_reloc_overflow;
1033 bfd_put_16 (input_bfd, Rvalue, hit_data);
1037 if ((r_type == R_CR16_ABS20) || (r_type == R_CR16_IMM20))
1039 Rvalue1 = (bfd_get_16 (input_bfd, hit_data + 2)
1040 | (((bfd_get_16 (input_bfd, hit_data) & 0xf) <<16)));
1042 /* Add or subtract the offset value. */
1043 if (Rvalue1 & 0x80000)
1044 Rvalue -= (~Rvalue1 + 1) & 0xfffff;
1048 /* Check for range. */
1049 if ((long) Rvalue > 0xfffff || (long) Rvalue < 0x0)
1050 return bfd_reloc_overflow;
1052 bfd_put_16 (input_bfd, ((bfd_get_16 (input_bfd, hit_data) & 0xfff0)
1053 | ((Rvalue >> 16) & 0xf)), hit_data);
1054 bfd_put_16 (input_bfd, (Rvalue) & 0xffff, hit_data + 2);
1056 else if (r_type == R_CR16_GOT_REGREL20)
1058 asection * sgot = bfd_get_linker_section (dynobj, ".got");
1064 off = h->got.offset;
1065 BFD_ASSERT (off != (bfd_vma) -1);
1067 if (! elf_hash_table (info)->dynamic_sections_created
1068 || SYMBOL_REFERENCES_LOCAL (info, h))
1069 /* This is actually a static link, or it is a
1070 -Bsymbolic link and the symbol is defined
1071 locally, or the symbol was forced to be local
1072 because of a version file. We must initialize
1073 this entry in the global offset table.
1074 When doing a dynamic link, we create a .rela.got
1075 relocation entry to initialize the value. This
1076 is done in the finish_dynamic_symbol routine. */
1077 bfd_put_32 (output_bfd, Rvalue, sgot->contents + off);
1079 Rvalue = sgot->output_offset + off;
1085 off = elf_local_got_offsets (input_bfd)[symndx];
1086 bfd_put_32 (output_bfd,Rvalue, sgot->contents + off);
1088 Rvalue = sgot->output_offset + off;
1093 /* REVISIT: if ((long) Rvalue > 0xffffff ||
1094 (long) Rvalue < -0x800000). */
1095 if ((long) Rvalue > 0xffffff || (long) Rvalue < 0)
1096 return bfd_reloc_overflow;
1099 bfd_put_16 (input_bfd, (bfd_get_16 (input_bfd, hit_data))
1100 | (((Rvalue >> 16) & 0xf) << 8), hit_data);
1101 bfd_put_16 (input_bfd, (Rvalue) & 0xffff, hit_data + 2);
1104 else if (r_type == R_CR16_GOTC_REGREL20)
1107 sgot = bfd_get_linker_section (dynobj, ".got");
1113 off = h->got.offset;
1114 BFD_ASSERT (off != (bfd_vma) -1);
1116 Rvalue >>=1; /* For code symbols. */
1118 if (! elf_hash_table (info)->dynamic_sections_created
1119 || SYMBOL_REFERENCES_LOCAL (info, h))
1120 /* This is actually a static link, or it is a
1121 -Bsymbolic link and the symbol is defined
1122 locally, or the symbol was forced to be local
1123 because of a version file. We must initialize
1124 this entry in the global offset table.
1125 When doing a dynamic link, we create a .rela.got
1126 relocation entry to initialize the value. This
1127 is done in the finish_dynamic_symbol routine. */
1128 bfd_put_32 (output_bfd, Rvalue, sgot->contents + off);
1130 Rvalue = sgot->output_offset + off;
1136 off = elf_local_got_offsets (input_bfd)[symndx];
1138 bfd_put_32 (output_bfd,Rvalue, sgot->contents + off);
1139 Rvalue = sgot->output_offset + off;
1144 /* Check if any value in DISP. */
1145 Rvalue1 =((bfd_get_32 (input_bfd, hit_data) >>16)
1146 | (((bfd_get_32 (input_bfd, hit_data) & 0xfff) >> 8) <<16));
1148 /* Add or subtract the offset value. */
1149 if (Rvalue1 & 0x80000)
1150 Rvalue -= (~Rvalue1 + 1) & 0xfffff;
1154 /* Check for range. */
1155 /* REVISIT: if ((long) Rvalue > 0xffffff
1156 || (long) Rvalue < -0x800000). */
1157 if ((long) Rvalue > 0xffffff || (long) Rvalue < 0)
1158 return bfd_reloc_overflow;
1160 bfd_put_16 (input_bfd, (bfd_get_16 (input_bfd, hit_data))
1161 | (((Rvalue >> 16) & 0xf) << 8), hit_data);
1162 bfd_put_16 (input_bfd, (Rvalue) & 0xffff, hit_data + 2);
1166 if (r_type == R_CR16_ABS24)
1168 Rvalue1 = ((bfd_get_32 (input_bfd, hit_data) >> 16)
1169 | (((bfd_get_32 (input_bfd, hit_data) & 0xfff) >> 8) <<16)
1170 | (((bfd_get_32 (input_bfd, hit_data) & 0xf) <<20)));
1172 /* Add or subtract the offset value. */
1173 if (Rvalue1 & 0x800000)
1174 Rvalue -= (~Rvalue1 + 1) & 0xffffff;
1178 /* Check for Range. */
1179 if ((long) Rvalue > 0xffffff || (long) Rvalue < 0x0)
1180 return bfd_reloc_overflow;
1182 Rvalue = ((((Rvalue >> 20) & 0xf) | (((Rvalue >> 16) & 0xf)<<8)
1183 | (bfd_get_32 (input_bfd, hit_data) & 0xf0f0))
1184 | ((Rvalue & 0xffff) << 16));
1186 else if (r_type == R_CR16_DISP24)
1188 Rvalue = ((((Rvalue >> 20)& 0xf) | (((Rvalue >>16) & 0xf)<<8)
1189 | (bfd_get_16 (input_bfd, hit_data)))
1190 | (((Rvalue & 0xfffe) | ((Rvalue >> 24) & 0x1)) << 16));
1192 else if ((r_type == R_CR16_IMM32) || (r_type == R_CR16_IMM32a))
1194 Rvalue1 =((((bfd_get_32 (input_bfd, hit_data)) >> 16) &0xffff)
1195 | (((bfd_get_32 (input_bfd, hit_data)) &0xffff)) << 16);
1197 /* Add or subtract the offset value. */
1198 if (Rvalue1 & 0x80000000)
1199 Rvalue -= (~Rvalue1 + 1) & 0xffffffff;
1203 /* Check for range. */
1204 if (Rvalue > 0xffffffff || (long) Rvalue < 0x0)
1205 return bfd_reloc_overflow;
1207 Rvalue = (((Rvalue >> 16)& 0xffff) | (Rvalue & 0xffff) << 16);
1209 else if (r_type == R_CR16_DISP24a)
1211 Rvalue = (((Rvalue & 0xfffffe) | (Rvalue >> 23)));
1212 Rvalue = ((Rvalue >> 16) & 0xff) | ((Rvalue & 0xffff) << 16)
1213 | (bfd_get_32 (input_bfd, hit_data));
1215 else if ((r_type == R_CR16_REGREL20)
1216 || (r_type == R_CR16_REGREL20a))
1218 Rvalue1 = ((bfd_get_32 (input_bfd, hit_data) >> 16)
1219 | (((bfd_get_32 (input_bfd, hit_data) & 0xfff) >> 8) <<16));
1220 /* Add or subtract the offset value. */
1221 if (Rvalue1 & 0x80000)
1222 Rvalue -= (~Rvalue1 + 1) & 0xfffff;
1226 /* Check for range. */
1227 if ((long) Rvalue > 0xfffff || (long) Rvalue < 0x0)
1228 return bfd_reloc_overflow;
1230 Rvalue = (((((Rvalue >> 20)& 0xf) | (((Rvalue >>16) & 0xf)<<8)
1231 | ((Rvalue & 0xffff) << 16)))
1232 | (bfd_get_32 (input_bfd, hit_data) & 0xf0ff));
1235 else if (r_type == R_CR16_NUM32)
1237 Rvalue1 = (bfd_get_32 (input_bfd, hit_data));
1239 /* Add or subtract the offset value */
1240 if (Rvalue1 & 0x80000000)
1241 Rvalue -= (~Rvalue1 + 1) & 0xffffffff;
1245 /* Check for Ranga */
1246 if (Rvalue > 0xffffffff)
1247 return bfd_reloc_overflow;
1250 bfd_put_32 (input_bfd, Rvalue, hit_data);
1255 return bfd_reloc_notsupported;
1258 return bfd_reloc_ok;
1261 /* Delete some bytes from a section while relaxing. */
1264 elf32_cr16_relax_delete_bytes (struct bfd_link_info *link_info, bfd *abfd,
1265 asection *sec, bfd_vma addr, int count)
1267 Elf_Internal_Shdr *symtab_hdr;
1268 unsigned int sec_shndx;
1270 Elf_Internal_Rela *irel, *irelend;
1272 Elf_Internal_Sym *isym;
1273 Elf_Internal_Sym *isymend;
1274 struct elf_link_hash_entry **sym_hashes;
1275 struct elf_link_hash_entry **end_hashes;
1276 struct elf_link_hash_entry **start_hashes;
1277 unsigned int symcount;
1279 sec_shndx = _bfd_elf_section_from_bfd_section (abfd, sec);
1281 contents = elf_section_data (sec)->this_hdr.contents;
1285 irel = elf_section_data (sec)->relocs;
1286 irelend = irel + sec->reloc_count;
1288 /* Actually delete the bytes. */
1289 memmove (contents + addr, contents + addr + count,
1290 (size_t) (toaddr - addr - count));
1293 /* Adjust all the relocs. */
1294 for (irel = elf_section_data (sec)->relocs; irel < irelend; irel++)
1295 /* Get the new reloc address. */
1296 if ((irel->r_offset > addr && irel->r_offset < toaddr))
1297 irel->r_offset -= count;
1299 /* Adjust the local symbols defined in this section. */
1300 symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
1301 isym = (Elf_Internal_Sym *) symtab_hdr->contents;
1302 for (isymend = isym + symtab_hdr->sh_info; isym < isymend; isym++)
1304 if (isym->st_shndx == sec_shndx
1305 && isym->st_value > addr
1306 && isym->st_value < toaddr)
1308 /* Adjust the addend of SWITCH relocations in this section,
1309 which reference this local symbol. */
1311 for (irel = elf_section_data (sec)->relocs; irel < irelend; irel++)
1313 unsigned long r_symndx;
1314 Elf_Internal_Sym *rsym;
1315 bfd_vma addsym, subsym;
1317 /* Skip if not a SWITCH relocation. */
1318 if (ELF32_R_TYPE (irel->r_info) != (int) R_CR16_SWITCH8
1319 && ELF32_R_TYPE (irel->r_info) != (int) R_CR16_SWITCH16
1320 && ELF32_R_TYPE (irel->r_info) != (int) R_CR16_SWITCH32)
1323 r_symndx = ELF32_R_SYM (irel->r_info);
1324 rsym = (Elf_Internal_Sym *) symtab_hdr->contents + r_symndx;
1326 /* Skip if not the local adjusted symbol. */
1330 addsym = isym->st_value;
1331 subsym = addsym - irel->r_addend;
1333 /* Fix the addend only when -->> (addsym > addr >= subsym). */
1335 irel->r_addend -= count;
1341 isym->st_value -= count;
1345 /* Now adjust the global symbols defined in this section. */
1346 symcount = (symtab_hdr->sh_size / sizeof (Elf32_External_Sym)
1347 - symtab_hdr->sh_info);
1348 sym_hashes = start_hashes = elf_sym_hashes (abfd);
1349 end_hashes = sym_hashes + symcount;
1351 for (; sym_hashes < end_hashes; sym_hashes++)
1353 struct elf_link_hash_entry *sym_hash = *sym_hashes;
1355 /* The '--wrap SYMBOL' option is causing a pain when the object file,
1356 containing the definition of __wrap_SYMBOL, includes a direct
1357 call to SYMBOL as well. Since both __wrap_SYMBOL and SYMBOL reference
1358 the same symbol (which is __wrap_SYMBOL), but still exist as two
1359 different symbols in 'sym_hashes', we don't want to adjust
1360 the global symbol __wrap_SYMBOL twice.
1361 This check is only relevant when symbols are being wrapped. */
1362 if (link_info->wrap_hash != NULL)
1364 struct elf_link_hash_entry **cur_sym_hashes;
1366 /* Loop only over the symbols whom been already checked. */
1367 for (cur_sym_hashes = start_hashes; cur_sym_hashes < sym_hashes;
1369 /* If the current symbol is identical to 'sym_hash', that means
1370 the symbol was already adjusted (or at least checked). */
1371 if (*cur_sym_hashes == sym_hash)
1374 /* Don't adjust the symbol again. */
1375 if (cur_sym_hashes < sym_hashes)
1379 if ((sym_hash->root.type == bfd_link_hash_defined
1380 || sym_hash->root.type == bfd_link_hash_defweak)
1381 && sym_hash->root.u.def.section == sec
1382 && sym_hash->root.u.def.value > addr
1383 && sym_hash->root.u.def.value < toaddr)
1384 sym_hash->root.u.def.value -= count;
1390 /* Relocate a CR16 ELF section. */
1393 elf32_cr16_relocate_section (bfd *output_bfd, struct bfd_link_info *info,
1394 bfd *input_bfd, asection *input_section,
1395 bfd_byte *contents, Elf_Internal_Rela *relocs,
1396 Elf_Internal_Sym *local_syms,
1397 asection **local_sections)
1399 Elf_Internal_Shdr *symtab_hdr;
1400 struct elf_link_hash_entry **sym_hashes;
1401 Elf_Internal_Rela *rel, *relend;
1403 symtab_hdr = &elf_tdata (input_bfd)->symtab_hdr;
1404 sym_hashes = elf_sym_hashes (input_bfd);
1407 relend = relocs + input_section->reloc_count;
1408 for (; rel < relend; rel++)
1411 reloc_howto_type *howto;
1412 unsigned long r_symndx;
1413 Elf_Internal_Sym *sym;
1415 struct elf_link_hash_entry *h;
1417 bfd_reloc_status_type r;
1419 r_symndx = ELF32_R_SYM (rel->r_info);
1420 r_type = ELF32_R_TYPE (rel->r_info);
1421 howto = cr16_elf_howto_table + (r_type);
1426 if (r_symndx < symtab_hdr->sh_info)
1428 sym = local_syms + r_symndx;
1429 sec = local_sections[r_symndx];
1430 relocation = _bfd_elf_rela_local_sym (output_bfd, sym, &sec, rel);
1434 bfd_boolean unresolved_reloc, warned, ignored;
1436 RELOC_FOR_GLOBAL_SYMBOL (info, input_bfd, input_section, rel,
1437 r_symndx, symtab_hdr, sym_hashes,
1439 unresolved_reloc, warned, ignored);
1442 if (sec != NULL && discarded_section (sec))
1443 RELOC_AGAINST_DISCARDED_SECTION (info, input_bfd, input_section,
1444 rel, 1, relend, howto, 0, contents);
1446 if (bfd_link_relocatable (info))
1449 r = cr16_elf_final_link_relocate (howto, input_bfd, output_bfd,
1451 contents, rel->r_offset,
1452 relocation, rel->r_addend,
1453 (struct elf_link_hash_entry *) h,
1455 info, sec, h == NULL);
1457 if (r != bfd_reloc_ok)
1460 const char *msg = NULL;
1463 name = h->root.root.string;
1466 name = (bfd_elf_string_from_elf_section
1467 (input_bfd, symtab_hdr->sh_link, sym->st_name));
1468 if (name == NULL || *name == '\0')
1469 name = bfd_section_name (input_bfd, sec);
1474 case bfd_reloc_overflow:
1475 if (!((*info->callbacks->reloc_overflow)
1476 (info, (h ? &h->root : NULL), name, howto->name,
1477 (bfd_vma) 0, input_bfd, input_section,
1482 case bfd_reloc_undefined:
1483 if (!((*info->callbacks->undefined_symbol)
1484 (info, name, input_bfd, input_section,
1485 rel->r_offset, TRUE)))
1489 case bfd_reloc_outofrange:
1490 msg = _("internal error: out of range error");
1493 case bfd_reloc_notsupported:
1494 msg = _("internal error: unsupported relocation error");
1497 case bfd_reloc_dangerous:
1498 msg = _("internal error: dangerous error");
1502 msg = _("internal error: unknown error");
1506 if (!((*info->callbacks->warning)
1507 (info, msg, name, input_bfd, input_section,
1518 /* This is a version of bfd_generic_get_relocated_section_contents
1519 which uses elf32_cr16_relocate_section. */
1522 elf32_cr16_get_relocated_section_contents (bfd *output_bfd,
1523 struct bfd_link_info *link_info,
1524 struct bfd_link_order *link_order,
1526 bfd_boolean relocatable,
1529 Elf_Internal_Shdr *symtab_hdr;
1530 asection *input_section = link_order->u.indirect.section;
1531 bfd *input_bfd = input_section->owner;
1532 asection **sections = NULL;
1533 Elf_Internal_Rela *internal_relocs = NULL;
1534 Elf_Internal_Sym *isymbuf = NULL;
1536 /* We only need to handle the case of relaxing, or of having a
1537 particular set of section contents, specially. */
1539 || elf_section_data (input_section)->this_hdr.contents == NULL)
1540 return bfd_generic_get_relocated_section_contents (output_bfd, link_info,
1545 symtab_hdr = &elf_tdata (input_bfd)->symtab_hdr;
1547 memcpy (data, elf_section_data (input_section)->this_hdr.contents,
1548 (size_t) input_section->size);
1550 if ((input_section->flags & SEC_RELOC) != 0
1551 && input_section->reloc_count > 0)
1553 Elf_Internal_Sym *isym;
1554 Elf_Internal_Sym *isymend;
1558 internal_relocs = _bfd_elf_link_read_relocs (input_bfd, input_section,
1560 if (internal_relocs == NULL)
1563 if (symtab_hdr->sh_info != 0)
1565 isymbuf = (Elf_Internal_Sym *) symtab_hdr->contents;
1566 if (isymbuf == NULL)
1567 isymbuf = bfd_elf_get_elf_syms (input_bfd, symtab_hdr,
1568 symtab_hdr->sh_info, 0,
1570 if (isymbuf == NULL)
1574 amt = symtab_hdr->sh_info;
1575 amt *= sizeof (asection *);
1576 sections = bfd_malloc (amt);
1577 if (sections == NULL && amt != 0)
1580 isymend = isymbuf + symtab_hdr->sh_info;
1581 for (isym = isymbuf, secpp = sections; isym < isymend; ++isym, ++secpp)
1585 if (isym->st_shndx == SHN_UNDEF)
1586 isec = bfd_und_section_ptr;
1587 else if (isym->st_shndx == SHN_ABS)
1588 isec = bfd_abs_section_ptr;
1589 else if (isym->st_shndx == SHN_COMMON)
1590 isec = bfd_com_section_ptr;
1592 isec = bfd_section_from_elf_index (input_bfd, isym->st_shndx);
1597 if (! elf32_cr16_relocate_section (output_bfd, link_info, input_bfd,
1598 input_section, data, internal_relocs,
1602 if (sections != NULL)
1605 && symtab_hdr->contents != (unsigned char *) isymbuf)
1607 if (elf_section_data (input_section)->relocs != internal_relocs)
1608 free (internal_relocs);
1614 if (sections != NULL)
1617 && symtab_hdr->contents != (unsigned char *) isymbuf)
1619 if (internal_relocs != NULL
1620 && elf_section_data (input_section)->relocs != internal_relocs)
1621 free (internal_relocs);
1625 /* Assorted hash table functions. */
1627 /* Initialize an entry in the link hash table. */
1629 /* Create an entry in an CR16 ELF linker hash table. */
1631 static struct bfd_hash_entry *
1632 elf32_cr16_link_hash_newfunc (struct bfd_hash_entry *entry,
1633 struct bfd_hash_table *table,
1636 struct elf32_cr16_link_hash_entry *ret =
1637 (struct elf32_cr16_link_hash_entry *) entry;
1639 /* Allocate the structure if it has not already been allocated by a
1641 if (ret == (struct elf32_cr16_link_hash_entry *) NULL)
1642 ret = ((struct elf32_cr16_link_hash_entry *)
1643 bfd_hash_allocate (table,
1644 sizeof (struct elf32_cr16_link_hash_entry)));
1645 if (ret == (struct elf32_cr16_link_hash_entry *) NULL)
1646 return (struct bfd_hash_entry *) ret;
1648 /* Call the allocation method of the superclass. */
1649 ret = ((struct elf32_cr16_link_hash_entry *)
1650 _bfd_elf_link_hash_newfunc ((struct bfd_hash_entry *) ret,
1652 if (ret != (struct elf32_cr16_link_hash_entry *) NULL)
1654 ret->direct_calls = 0;
1655 ret->stack_size = 0;
1657 ret->movm_stack_size = 0;
1662 return (struct bfd_hash_entry *) ret;
1665 /* Create an cr16 ELF linker hash table. */
1667 static struct bfd_link_hash_table *
1668 elf32_cr16_link_hash_table_create (bfd *abfd)
1670 struct elf_link_hash_table *ret;
1671 bfd_size_type amt = sizeof (struct elf_link_hash_table);
1673 ret = (struct elf_link_hash_table *) bfd_zmalloc (amt);
1674 if (ret == (struct elf_link_hash_table *) NULL)
1677 if (!_bfd_elf_link_hash_table_init (ret, abfd,
1678 elf32_cr16_link_hash_newfunc,
1679 sizeof (struct elf32_cr16_link_hash_entry),
1689 static unsigned long
1690 elf_cr16_mach (flagword flags)
1696 return bfd_mach_cr16;
1700 /* The final processing done just before writing out a CR16 ELF object
1701 file. This gets the CR16 architecture right based on the machine
1705 _bfd_cr16_elf_final_write_processing (bfd *abfd,
1706 bfd_boolean linker ATTRIBUTE_UNUSED)
1709 switch (bfd_get_mach (abfd))
1718 elf_elfheader (abfd)->e_flags |= val;
1723 _bfd_cr16_elf_object_p (bfd *abfd)
1725 bfd_default_set_arch_mach (abfd, bfd_arch_cr16,
1726 elf_cr16_mach (elf_elfheader (abfd)->e_flags));
1730 /* Merge backend specific data from an object file to the output
1731 object file when linking. */
1734 _bfd_cr16_elf_merge_private_bfd_data (bfd *ibfd, bfd *obfd)
1736 if (bfd_get_flavour (ibfd) != bfd_target_elf_flavour
1737 || bfd_get_flavour (obfd) != bfd_target_elf_flavour)
1740 if (bfd_get_arch (obfd) == bfd_get_arch (ibfd)
1741 && bfd_get_mach (obfd) < bfd_get_mach (ibfd))
1743 if (! bfd_set_arch_mach (obfd, bfd_get_arch (ibfd),
1744 bfd_get_mach (ibfd)))
1752 /* This function handles relaxing for the CR16.
1754 There's quite a few relaxing opportunites available on the CR16:
1756 * bcond:24 -> bcond:16 1 byte
1757 * bcond:16 -> bcond:8 1 byte
1758 * arithmetic imm32 -> arithmetic imm20 12 bits
1759 * arithmetic imm20/imm16 -> arithmetic imm4 12/16 bits
1761 Symbol- and reloc-reading infrastructure copied from elf-m10200.c. */
1764 elf32_cr16_relax_section (bfd *abfd, asection *sec,
1765 struct bfd_link_info *link_info, bfd_boolean *again)
1767 Elf_Internal_Shdr *symtab_hdr;
1768 Elf_Internal_Rela *internal_relocs;
1769 Elf_Internal_Rela *irel, *irelend;
1770 bfd_byte *contents = NULL;
1771 Elf_Internal_Sym *isymbuf = NULL;
1773 /* Assume nothing changes. */
1776 /* We don't have to do anything for a relocatable link, if
1777 this section does not have relocs, or if this is not a
1779 if (bfd_link_relocatable (link_info)
1780 || (sec->flags & SEC_RELOC) == 0
1781 || sec->reloc_count == 0
1782 || (sec->flags & SEC_CODE) == 0)
1785 symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
1787 /* Get a copy of the native relocations. */
1788 internal_relocs = _bfd_elf_link_read_relocs (abfd, sec, NULL, NULL,
1789 link_info->keep_memory);
1790 if (internal_relocs == NULL)
1793 /* Walk through them looking for relaxing opportunities. */
1794 irelend = internal_relocs + sec->reloc_count;
1795 for (irel = internal_relocs; irel < irelend; irel++)
1799 /* If this isn't something that can be relaxed, then ignore
1801 if (ELF32_R_TYPE (irel->r_info) != (int) R_CR16_DISP16
1802 && ELF32_R_TYPE (irel->r_info) != (int) R_CR16_DISP24
1803 && ELF32_R_TYPE (irel->r_info) != (int) R_CR16_IMM32
1804 && ELF32_R_TYPE (irel->r_info) != (int) R_CR16_IMM20
1805 && ELF32_R_TYPE (irel->r_info) != (int) R_CR16_IMM16)
1808 /* Get the section contents if we haven't done so already. */
1809 if (contents == NULL)
1811 /* Get cached copy if it exists. */
1812 if (elf_section_data (sec)->this_hdr.contents != NULL)
1813 contents = elf_section_data (sec)->this_hdr.contents;
1814 /* Go get them off disk. */
1815 else if (!bfd_malloc_and_get_section (abfd, sec, &contents))
1819 /* Read this BFD's local symbols if we haven't done so already. */
1820 if (isymbuf == NULL && symtab_hdr->sh_info != 0)
1822 isymbuf = (Elf_Internal_Sym *) symtab_hdr->contents;
1823 if (isymbuf == NULL)
1824 isymbuf = bfd_elf_get_elf_syms (abfd, symtab_hdr,
1825 symtab_hdr->sh_info, 0,
1827 if (isymbuf == NULL)
1831 /* Get the value of the symbol referred to by the reloc. */
1832 if (ELF32_R_SYM (irel->r_info) < symtab_hdr->sh_info)
1834 /* A local symbol. */
1835 Elf_Internal_Sym *isym;
1838 isym = isymbuf + ELF32_R_SYM (irel->r_info);
1839 if (isym->st_shndx == SHN_UNDEF)
1840 sym_sec = bfd_und_section_ptr;
1841 else if (isym->st_shndx == SHN_ABS)
1842 sym_sec = bfd_abs_section_ptr;
1843 else if (isym->st_shndx == SHN_COMMON)
1844 sym_sec = bfd_com_section_ptr;
1846 sym_sec = bfd_section_from_elf_index (abfd, isym->st_shndx);
1847 symval = (isym->st_value
1848 + sym_sec->output_section->vma
1849 + sym_sec->output_offset);
1854 struct elf_link_hash_entry *h;
1856 /* An external symbol. */
1857 indx = ELF32_R_SYM (irel->r_info) - symtab_hdr->sh_info;
1858 h = elf_sym_hashes (abfd)[indx];
1859 BFD_ASSERT (h != NULL);
1861 if (h->root.type != bfd_link_hash_defined
1862 && h->root.type != bfd_link_hash_defweak)
1863 /* This appears to be a reference to an undefined
1864 symbol. Just ignore it--it will be caught by the
1865 regular reloc processing. */
1868 symval = (h->root.u.def.value
1869 + h->root.u.def.section->output_section->vma
1870 + h->root.u.def.section->output_offset);
1873 /* For simplicity of coding, we are going to modify the section
1874 contents, the section relocs, and the BFD symbol table. We
1875 must tell the rest of the code not to free up this
1876 information. It would be possible to instead create a table
1877 of changes which have to be made, as is done in coff-mips.c;
1878 that would be more work, but would require less memory when
1879 the linker is run. */
1881 /* Try to turn a 24 branch/call into a 16bit relative
1883 if (ELF32_R_TYPE (irel->r_info) == (int) R_CR16_DISP24)
1885 bfd_vma value = symval;
1887 /* Deal with pc-relative gunk. */
1888 value -= (sec->output_section->vma + sec->output_offset);
1889 value -= irel->r_offset;
1890 value += irel->r_addend;
1892 /* See if the value will fit in 16 bits, note the high value is
1893 0xfffe + 2 as the target will be two bytes closer if we are
1895 if ((long) value < 0x10000 && (long) value > -0x10002)
1899 /* Get the opcode. */
1900 code = (unsigned int) bfd_get_32 (abfd, contents + irel->r_offset);
1902 /* Verify it's a 'bcond' and fix the opcode. */
1903 if ((code & 0xffff) == 0x0010)
1904 bfd_put_16 (abfd, 0x1800 | ((0xf & (code >> 20)) << 4), contents + irel->r_offset);
1908 /* Note that we've changed the relocs, section contents, etc. */
1909 elf_section_data (sec)->relocs = internal_relocs;
1910 elf_section_data (sec)->this_hdr.contents = contents;
1911 symtab_hdr->contents = (unsigned char *) isymbuf;
1913 /* Fix the relocation's type. */
1914 irel->r_info = ELF32_R_INFO (ELF32_R_SYM (irel->r_info),
1917 /* Delete two bytes of data. */
1918 if (!elf32_cr16_relax_delete_bytes (link_info, abfd, sec,
1919 irel->r_offset + 2, 2))
1922 /* That will change things, so, we should relax again.
1923 Note that this is not required, and it may be slow. */
1928 /* Try to turn a 16bit pc-relative branch into an
1929 8bit pc-relative branch. */
1930 if (ELF32_R_TYPE (irel->r_info) == (int) R_CR16_DISP16)
1932 bfd_vma value = symval;
1934 /* Deal with pc-relative gunk. */
1935 value -= (sec->output_section->vma + sec->output_offset);
1936 value -= irel->r_offset;
1937 value += irel->r_addend;
1939 /* See if the value will fit in 8 bits, note the high value is
1940 0xfc + 2 as the target will be two bytes closer if we are
1942 /*if ((long) value < 0x1fa && (long) value > -0x100) REVISIT:range */
1943 if ((long) value < 0xfa && (long) value > -0x100)
1945 unsigned short code;
1947 /* Get the opcode. */
1948 code = (unsigned short) bfd_get_16 (abfd, contents + irel->r_offset);
1950 /* Verify it's a 'bcond' and fix the opcode. */
1951 if ((code & 0xff0f) == 0x1800)
1952 bfd_put_16 (abfd, (code & 0xf0f0), contents + irel->r_offset);
1956 /* Note that we've changed the relocs, section contents, etc. */
1957 elf_section_data (sec)->relocs = internal_relocs;
1958 elf_section_data (sec)->this_hdr.contents = contents;
1959 symtab_hdr->contents = (unsigned char *) isymbuf;
1961 /* Fix the relocation's type. */
1962 irel->r_info = ELF32_R_INFO (ELF32_R_SYM (irel->r_info),
1965 /* Delete two bytes of data. */
1966 if (!elf32_cr16_relax_delete_bytes (link_info, abfd, sec,
1967 irel->r_offset + 2, 2))
1970 /* That will change things, so, we should relax again.
1971 Note that this is not required, and it may be slow. */
1976 /* Try to turn a 32-bit IMM address into a 20/16-bit IMM address */
1977 if (ELF32_R_TYPE (irel->r_info) == (int) R_CR16_IMM32)
1979 bfd_vma value = symval;
1980 unsigned short is_add_mov = 0;
1983 /* Get the existing value from the mcode */
1984 value1 = ((bfd_get_32 (abfd, contents + irel->r_offset + 2) >> 16)
1985 |(((bfd_get_32 (abfd, contents + irel->r_offset + 2) & 0xffff) << 16)));
1987 /* See if the value will fit in 20 bits. */
1988 if ((long) (value + value1) < 0xfffff && (long) (value + value1) > 0)
1990 unsigned short code;
1992 /* Get the opcode. */
1993 code = (unsigned short) bfd_get_16 (abfd, contents + irel->r_offset);
1995 /* Verify it's a 'arithmetic ADDD or MOVD instruction'.
1996 For ADDD and MOVD only, convert to IMM32 -> IMM20. */
1998 if (((code & 0xfff0) == 0x0070) || ((code & 0xfff0) == 0x0020))
2003 /* Note that we've changed the relocs, section contents,
2005 elf_section_data (sec)->relocs = internal_relocs;
2006 elf_section_data (sec)->this_hdr.contents = contents;
2007 symtab_hdr->contents = (unsigned char *) isymbuf;
2009 /* Fix the opcode. */
2010 if ((code & 0xfff0) == 0x0070) /* For movd. */
2011 bfd_put_8 (abfd, 0x05, contents + irel->r_offset + 1);
2012 else /* code == 0x0020 for addd. */
2013 bfd_put_8 (abfd, 0x04, contents + irel->r_offset + 1);
2015 bfd_put_8 (abfd, (code & 0xf) << 4, contents + irel->r_offset);
2017 /* If existing value is nagavive adjust approriately
2018 place the 16-20bits (ie 4 bit) in new opcode,
2019 as the 0xffffxxxx, the higher 2 byte values removed. */
2020 if (value1 & 0x80000000)
2021 bfd_put_8 (abfd, (0x0f | (bfd_get_8(abfd, contents + irel->r_offset))), contents + irel->r_offset);
2023 bfd_put_8 (abfd, (((value1 >> 16)&0xf) | (bfd_get_8(abfd, contents + irel->r_offset))), contents + irel->r_offset);
2025 /* Fix the relocation's type. */
2026 irel->r_info = ELF32_R_INFO (ELF32_R_SYM (irel->r_info),
2029 /* Delete two bytes of data. */
2030 if (!elf32_cr16_relax_delete_bytes (link_info, abfd, sec,
2031 irel->r_offset + 2, 2))
2034 /* That will change things, so, we should relax again.
2035 Note that this is not required, and it may be slow. */
2040 /* See if the value will fit in 16 bits. */
2042 && ((long)(value + value1) < 0x7fff && (long)(value + value1) > 0))
2044 unsigned short code;
2046 /* Get the opcode. */
2047 code = (unsigned short) bfd_get_16 (abfd, contents + irel->r_offset);
2049 /* Note that we've changed the relocs, section contents, etc. */
2050 elf_section_data (sec)->relocs = internal_relocs;
2051 elf_section_data (sec)->this_hdr.contents = contents;
2052 symtab_hdr->contents = (unsigned char *) isymbuf;
2054 /* Fix the opcode. */
2055 if ((code & 0xf0) == 0x70) /* For movd. */
2056 bfd_put_8 (abfd, 0x54, contents + irel->r_offset + 1);
2057 else if ((code & 0xf0) == 0x20) /* For addd. */
2058 bfd_put_8 (abfd, 0x60, contents + irel->r_offset + 1);
2059 else if ((code & 0xf0) == 0x90) /* For cmpd. */
2060 bfd_put_8 (abfd, 0x56, contents + irel->r_offset + 1);
2064 bfd_put_8 (abfd, 0xb0 | (code & 0xf), contents + irel->r_offset);
2066 /* If existing value is nagavive adjust approriately
2067 place the 12-16bits (ie 4 bit) in new opcode,
2068 as the 0xfffffxxx, the higher 2 byte values removed. */
2069 if (value1 & 0x80000000)
2070 bfd_put_8 (abfd, (0x0f | (bfd_get_8(abfd, contents + irel->r_offset))), contents + irel->r_offset);
2072 bfd_put_16 (abfd, value1, contents + irel->r_offset + 2);
2075 /* Fix the relocation's type. */
2076 irel->r_info = ELF32_R_INFO (ELF32_R_SYM (irel->r_info),
2079 /* Delete two bytes of data. */
2080 if (!elf32_cr16_relax_delete_bytes (link_info, abfd, sec,
2081 irel->r_offset + 2, 2))
2084 /* That will change things, so, we should relax again.
2085 Note that this is not required, and it may be slow. */
2091 /* Try to turn a 16bit immediate address into a 4bit
2092 immediate address. */
2093 if ((ELF32_R_TYPE (irel->r_info) == (int) R_CR16_IMM20)
2094 || (ELF32_R_TYPE (irel->r_info) == (int) R_CR16_IMM16))
2096 bfd_vma value = symval;
2099 /* Get the existing value from the mcode */
2100 value1 = ((bfd_get_16 (abfd, contents + irel->r_offset + 2) & 0xffff));
2102 if (ELF32_R_TYPE (irel->r_info) == (int) R_CR16_IMM20)
2104 value1 |= ((bfd_get_16 (abfd, contents + irel->r_offset + 1) & 0xf000) << 0x4);
2107 /* See if the value will fit in 4 bits. */
2108 if ((((long) (value + value1)) < 0xf)
2109 && (((long) (value + value1)) > 0))
2111 unsigned short code;
2113 /* Get the opcode. */
2114 code = (unsigned short) bfd_get_16 (abfd, contents + irel->r_offset);
2116 /* Note that we've changed the relocs, section contents, etc. */
2117 elf_section_data (sec)->relocs = internal_relocs;
2118 elf_section_data (sec)->this_hdr.contents = contents;
2119 symtab_hdr->contents = (unsigned char *) isymbuf;
2121 /* Fix the opcode. */
2122 if (((code & 0x0f00) == 0x0400) || ((code & 0x0f00) == 0x0500))
2124 if ((code & 0x0f00) == 0x0400) /* For movd imm20. */
2125 bfd_put_8 (abfd, 0x60, contents + irel->r_offset);
2126 else /* For addd imm20. */
2127 bfd_put_8 (abfd, 0x54, contents + irel->r_offset);
2128 bfd_put_8 (abfd, (code & 0xf0) >> 4, contents + irel->r_offset + 1);
2132 if ((code & 0xfff0) == 0x56b0) /* For cmpd imm16. */
2133 bfd_put_8 (abfd, 0x56, contents + irel->r_offset);
2134 else if ((code & 0xfff0) == 0x54b0) /* For movd imm16. */
2135 bfd_put_8 (abfd, 0x54, contents + irel->r_offset);
2136 else if ((code & 0xfff0) == 0x58b0) /* For movb imm16. */
2137 bfd_put_8 (abfd, 0x58, contents + irel->r_offset);
2138 else if ((code & 0xfff0) == 0x5Ab0) /* For movw imm16. */
2139 bfd_put_8 (abfd, 0x5A, contents + irel->r_offset);
2140 else if ((code & 0xfff0) == 0x60b0) /* For addd imm16. */
2141 bfd_put_8 (abfd, 0x60, contents + irel->r_offset);
2142 else if ((code & 0xfff0) == 0x30b0) /* For addb imm16. */
2143 bfd_put_8 (abfd, 0x30, contents + irel->r_offset);
2144 else if ((code & 0xfff0) == 0x2Cb0) /* For addub imm16. */
2145 bfd_put_8 (abfd, 0x2C, contents + irel->r_offset);
2146 else if ((code & 0xfff0) == 0x32b0) /* For adduw imm16. */
2147 bfd_put_8 (abfd, 0x32, contents + irel->r_offset);
2148 else if ((code & 0xfff0) == 0x38b0) /* For subb imm16. */
2149 bfd_put_8 (abfd, 0x38, contents + irel->r_offset);
2150 else if ((code & 0xfff0) == 0x3Cb0) /* For subcb imm16. */
2151 bfd_put_8 (abfd, 0x3C, contents + irel->r_offset);
2152 else if ((code & 0xfff0) == 0x3Fb0) /* For subcw imm16. */
2153 bfd_put_8 (abfd, 0x3F, contents + irel->r_offset);
2154 else if ((code & 0xfff0) == 0x3Ab0) /* For subw imm16. */
2155 bfd_put_8 (abfd, 0x3A, contents + irel->r_offset);
2156 else if ((code & 0xfff0) == 0x50b0) /* For cmpb imm16. */
2157 bfd_put_8 (abfd, 0x50, contents + irel->r_offset);
2158 else if ((code & 0xfff0) == 0x52b0) /* For cmpw imm16. */
2159 bfd_put_8 (abfd, 0x52, contents + irel->r_offset);
2163 bfd_put_8 (abfd, (code & 0xf), contents + irel->r_offset + 1);
2166 /* Fix the relocation's type. */
2167 irel->r_info = ELF32_R_INFO (ELF32_R_SYM (irel->r_info),
2170 /* Delete two bytes of data. */
2171 if (!elf32_cr16_relax_delete_bytes (link_info, abfd, sec,
2172 irel->r_offset + 2, 2))
2175 /* That will change things, so, we should relax again.
2176 Note that this is not required, and it may be slow. */
2184 && symtab_hdr->contents != (unsigned char *) isymbuf)
2186 if (! link_info->keep_memory)
2189 /* Cache the symbols for elf_link_input_bfd. */
2190 symtab_hdr->contents = (unsigned char *) isymbuf;
2193 if (contents != NULL
2194 && elf_section_data (sec)->this_hdr.contents != contents)
2196 if (! link_info->keep_memory)
2199 /* Cache the section contents for elf_link_input_bfd. */
2200 elf_section_data (sec)->this_hdr.contents = contents;
2204 if (internal_relocs != NULL
2205 && elf_section_data (sec)->relocs != internal_relocs)
2206 free (internal_relocs);
2212 && symtab_hdr->contents != (unsigned char *) isymbuf)
2214 if (contents != NULL
2215 && elf_section_data (sec)->this_hdr.contents != contents)
2217 if (internal_relocs != NULL
2218 && elf_section_data (sec)->relocs != internal_relocs)
2219 free (internal_relocs);
2225 elf32_cr16_gc_mark_hook (asection *sec,
2226 struct bfd_link_info *info,
2227 Elf_Internal_Rela *rel,
2228 struct elf_link_hash_entry *h,
2229 Elf_Internal_Sym *sym)
2231 return _bfd_elf_gc_mark_hook (sec, info, rel, h, sym);
2234 /* Update the got entry reference counts for the section being removed. */
2237 elf32_cr16_gc_sweep_hook (bfd *abfd ATTRIBUTE_UNUSED,
2238 struct bfd_link_info *info ATTRIBUTE_UNUSED,
2239 asection *sec ATTRIBUTE_UNUSED,
2240 const Elf_Internal_Rela *relocs ATTRIBUTE_UNUSED)
2242 /* We don't support garbage collection of GOT and PLT relocs yet. */
2246 /* Create dynamic sections when linking against a dynamic object. */
2249 _bfd_cr16_elf_create_dynamic_sections (bfd *abfd, struct bfd_link_info *info)
2253 const struct elf_backend_data * bed = get_elf_backend_data (abfd);
2256 switch (bed->s->arch_size)
2267 bfd_set_error (bfd_error_bad_value);
2271 /* We need to create .plt, .rel[a].plt, .got, .got.plt, .dynbss, and
2272 .rel[a].bss sections. */
2274 flags = (SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS | SEC_IN_MEMORY
2275 | SEC_LINKER_CREATED);
2277 s = bfd_make_section_anyway_with_flags (abfd,
2278 (bed->default_use_rela_p
2279 ? ".rela.plt" : ".rel.plt"),
2280 flags | SEC_READONLY);
2282 || ! bfd_set_section_alignment (abfd, s, ptralign))
2285 if (! _bfd_cr16_elf_create_got_section (abfd, info))
2288 if (bed->want_dynbss)
2290 /* The .dynbss section is a place to put symbols which are defined
2291 by dynamic objects, are referenced by regular objects, and are
2292 not functions. We must allocate space for them in the process
2293 image and use a R_*_COPY reloc to tell the dynamic linker to
2294 initialize them at run time. The linker script puts the .dynbss
2295 section into the .bss section of the final image. */
2296 s = bfd_make_section_anyway_with_flags (abfd, ".dynbss",
2297 SEC_ALLOC | SEC_LINKER_CREATED);
2301 /* The .rel[a].bss section holds copy relocs. This section is not
2302 normally needed. We need to create it here, though, so that the
2303 linker will map it to an output section. We can't just create it
2304 only if we need it, because we will not know whether we need it
2305 until we have seen all the input files, and the first time the
2306 main linker code calls BFD after examining all the input files
2307 (size_dynamic_sections) the input sections have already been
2308 mapped to the output sections. If the section turns out not to
2309 be needed, we can discard it later. We will never need this
2310 section when generating a shared object, since they do not use
2312 if (! bfd_link_executable (info))
2314 s = bfd_make_section_anyway_with_flags (abfd,
2315 (bed->default_use_rela_p
2316 ? ".rela.bss" : ".rel.bss"),
2317 flags | SEC_READONLY);
2319 || ! bfd_set_section_alignment (abfd, s, ptralign))
2327 /* Adjust a symbol defined by a dynamic object and referenced by a
2328 regular object. The current definition is in some section of the
2329 dynamic object, but we're not including those sections. We have to
2330 change the definition to something the rest of the link can
2334 _bfd_cr16_elf_adjust_dynamic_symbol (struct bfd_link_info * info,
2335 struct elf_link_hash_entry * h)
2340 dynobj = elf_hash_table (info)->dynobj;
2342 /* Make sure we know what is going on here. */
2343 BFD_ASSERT (dynobj != NULL
2345 || h->u.weakdef != NULL
2348 && !h->def_regular)));
2350 /* If this is a function, put it in the procedure linkage table. We
2351 will fill in the contents of the procedure linkage table later,
2352 when we know the address of the .got section. */
2353 if (h->type == STT_FUNC
2356 if (! bfd_link_executable (info)
2360 /* This case can occur if we saw a PLT reloc in an input
2361 file, but the symbol was never referred to by a dynamic
2362 object. In such a case, we don't actually need to build
2363 a procedure linkage table, and we can just do a REL32
2365 BFD_ASSERT (h->needs_plt);
2369 /* Make sure this symbol is output as a dynamic symbol. */
2370 if (h->dynindx == -1)
2372 if (! bfd_elf_link_record_dynamic_symbol (info, h))
2376 /* We also need to make an entry in the .got.plt section, which
2377 will be placed in the .got section by the linker script. */
2379 s = bfd_get_linker_section (dynobj, ".got.plt");
2380 BFD_ASSERT (s != NULL);
2383 /* We also need to make an entry in the .rela.plt section. */
2385 s = bfd_get_linker_section (dynobj, ".rela.plt");
2386 BFD_ASSERT (s != NULL);
2387 s->size += sizeof (Elf32_External_Rela);
2392 /* If this is a weak symbol, and there is a real definition, the
2393 processor independent code will have arranged for us to see the
2394 real definition first, and we can just use the same value. */
2395 if (h->u.weakdef != NULL)
2397 BFD_ASSERT (h->u.weakdef->root.type == bfd_link_hash_defined
2398 || h->u.weakdef->root.type == bfd_link_hash_defweak);
2399 h->root.u.def.section = h->u.weakdef->root.u.def.section;
2400 h->root.u.def.value = h->u.weakdef->root.u.def.value;
2404 /* This is a reference to a symbol defined by a dynamic object which
2405 is not a function. */
2407 /* If we are creating a shared library, we must presume that the
2408 only references to the symbol are via the global offset table.
2409 For such cases we need not do anything here; the relocations will
2410 be handled correctly by relocate_section. */
2411 if (bfd_link_executable (info))
2414 /* If there are no references to this symbol that do not use the
2415 GOT, we don't need to generate a copy reloc. */
2416 if (!h->non_got_ref)
2419 /* We must allocate the symbol in our .dynbss section, which will
2420 become part of the .bss section of the executable. There will be
2421 an entry for this symbol in the .dynsym section. The dynamic
2422 object will contain position independent code, so all references
2423 from the dynamic object to this symbol will go through the global
2424 offset table. The dynamic linker will use the .dynsym entry to
2425 determine the address it must put in the global offset table, so
2426 both the dynamic object and the regular object will refer to the
2427 same memory location for the variable. */
2429 s = bfd_get_linker_section (dynobj, ".dynbss");
2430 BFD_ASSERT (s != NULL);
2432 /* We must generate a R_CR16_COPY reloc to tell the dynamic linker to
2433 copy the initial value out of the dynamic object and into the
2434 runtime process image. We need to remember the offset into the
2435 .rela.bss section we are going to use. */
2436 if ((h->root.u.def.section->flags & SEC_ALLOC) != 0 && h->size != 0)
2440 srel = bfd_get_linker_section (dynobj, ".rela.bss");
2441 BFD_ASSERT (srel != NULL);
2442 srel->size += sizeof (Elf32_External_Rela);
2446 return _bfd_elf_adjust_dynamic_copy (info, h, s);
2449 /* Set the sizes of the dynamic sections. */
2452 _bfd_cr16_elf_size_dynamic_sections (bfd * output_bfd,
2453 struct bfd_link_info * info)
2459 bfd_boolean reltext;
2461 dynobj = elf_hash_table (info)->dynobj;
2462 BFD_ASSERT (dynobj != NULL);
2464 if (elf_hash_table (info)->dynamic_sections_created)
2466 /* Set the contents of the .interp section to the interpreter. */
2467 if (bfd_link_executable (info) && !info->nointerp)
2470 s = bfd_get_linker_section (dynobj, ".interp");
2471 BFD_ASSERT (s != NULL);
2472 s->size = sizeof ELF_DYNAMIC_INTERPRETER;
2473 s->contents = (unsigned char *) ELF_DYNAMIC_INTERPRETER;
2479 /* We may have created entries in the .rela.got section.
2480 However, if we are not creating the dynamic sections, we will
2481 not actually use these entries. Reset the size of .rela.got,
2482 which will cause it to get stripped from the output file
2484 s = bfd_get_linker_section (dynobj, ".rela.got");
2489 /* The check_relocs and adjust_dynamic_symbol entry points have
2490 determined the sizes of the various dynamic sections. Allocate
2495 for (s = dynobj->sections; s != NULL; s = s->next)
2499 if ((s->flags & SEC_LINKER_CREATED) == 0)
2502 /* It's OK to base decisions on the section name, because none
2503 of the dynobj section names depend upon the input files. */
2504 name = bfd_get_section_name (dynobj, s);
2506 if (strcmp (name, ".plt") == 0)
2508 /* Remember whether there is a PLT. */
2511 else if (CONST_STRNEQ (name, ".rela"))
2517 /* Remember whether there are any reloc sections other
2519 if (strcmp (name, ".rela.plt") != 0)
2521 const char * outname;
2525 /* If this relocation section applies to a read only
2526 section, then we probably need a DT_TEXTREL
2527 entry. The entries in the .rela.plt section
2528 really apply to the .got section, which we
2529 created ourselves and so know is not readonly. */
2530 outname = bfd_get_section_name (output_bfd,
2532 target = bfd_get_section_by_name (output_bfd, outname + 5);
2534 && (target->flags & SEC_READONLY) != 0
2535 && (target->flags & SEC_ALLOC) != 0)
2539 /* We use the reloc_count field as a counter if we need
2540 to copy relocs into the output file. */
2544 else if (! CONST_STRNEQ (name, ".got")
2545 && strcmp (name, ".dynbss") != 0)
2546 /* It's not one of our sections, so don't allocate space. */
2551 /* If we don't need this section, strip it from the
2552 output file. This is mostly to handle .rela.bss and
2553 .rela.plt. We must create both sections in
2554 create_dynamic_sections, because they must be created
2555 before the linker maps input sections to output
2556 sections. The linker does that before
2557 adjust_dynamic_symbol is called, and it is that
2558 function which decides whether anything needs to go
2559 into these sections. */
2560 s->flags |= SEC_EXCLUDE;
2564 if ((s->flags & SEC_HAS_CONTENTS) == 0)
2567 /* Allocate memory for the section contents. We use bfd_zalloc
2568 here in case unused entries are not reclaimed before the
2569 section's contents are written out. This should not happen,
2570 but this way if it does, we get a R_CR16_NONE reloc
2571 instead of garbage. */
2572 s->contents = (bfd_byte *) bfd_zalloc (dynobj, s->size);
2573 if (s->contents == NULL)
2577 if (elf_hash_table (info)->dynamic_sections_created)
2579 /* Add some entries to the .dynamic section. We fill in the
2580 values later, in _bfd_cr16_elf_finish_dynamic_sections,
2581 but we must add the entries now so that we get the correct
2582 size for the .dynamic section. The DT_DEBUG entry is filled
2583 in by the dynamic linker and used by the debugger. */
2584 if (! bfd_link_executable (info))
2586 if (!_bfd_elf_add_dynamic_entry (info, DT_DEBUG, 0))
2592 if (!_bfd_elf_add_dynamic_entry (info, DT_PLTGOT, 0)
2593 || !_bfd_elf_add_dynamic_entry (info, DT_PLTRELSZ, 0)
2594 || !_bfd_elf_add_dynamic_entry (info, DT_PLTREL, DT_RELA)
2595 || !_bfd_elf_add_dynamic_entry (info, DT_JMPREL, 0))
2601 if (!_bfd_elf_add_dynamic_entry (info, DT_RELA, 0)
2602 || !_bfd_elf_add_dynamic_entry (info, DT_RELASZ, 0)
2603 || !_bfd_elf_add_dynamic_entry (info, DT_RELAENT,
2604 sizeof (Elf32_External_Rela)))
2610 if (!_bfd_elf_add_dynamic_entry (info, DT_TEXTREL, 0))
2618 /* Finish up dynamic symbol handling. We set the contents of various
2619 dynamic sections here. */
2622 _bfd_cr16_elf_finish_dynamic_symbol (bfd * output_bfd,
2623 struct bfd_link_info * info,
2624 struct elf_link_hash_entry * h,
2625 Elf_Internal_Sym * sym)
2629 dynobj = elf_hash_table (info)->dynobj;
2631 if (h->got.offset != (bfd_vma) -1)
2635 Elf_Internal_Rela rel;
2637 /* This symbol has an entry in the global offset table. Set it up. */
2639 sgot = bfd_get_linker_section (dynobj, ".got");
2640 srel = bfd_get_linker_section (dynobj, ".rela.got");
2641 BFD_ASSERT (sgot != NULL && srel != NULL);
2643 rel.r_offset = (sgot->output_section->vma
2644 + sgot->output_offset
2645 + (h->got.offset & ~1));
2647 /* If this is a -Bsymbolic link, and the symbol is defined
2648 locally, we just want to emit a RELATIVE reloc. Likewise if
2649 the symbol was forced to be local because of a version file.
2650 The entry in the global offset table will already have been
2651 initialized in the relocate_section function. */
2652 if (bfd_link_executable (info)
2653 && (info->symbolic || h->dynindx == -1)
2656 rel.r_info = ELF32_R_INFO (0, R_CR16_GOT_REGREL20);
2657 rel.r_addend = (h->root.u.def.value
2658 + h->root.u.def.section->output_section->vma
2659 + h->root.u.def.section->output_offset);
2663 bfd_put_32 (output_bfd, (bfd_vma) 0, sgot->contents + h->got.offset);
2664 rel.r_info = ELF32_R_INFO (h->dynindx, R_CR16_GOT_REGREL20);
2668 bfd_elf32_swap_reloca_out (output_bfd, &rel,
2669 (bfd_byte *) ((Elf32_External_Rela *) srel->contents
2670 + srel->reloc_count));
2671 ++ srel->reloc_count;
2677 Elf_Internal_Rela rel;
2679 /* This symbol needs a copy reloc. Set it up. */
2680 BFD_ASSERT (h->dynindx != -1
2681 && (h->root.type == bfd_link_hash_defined
2682 || h->root.type == bfd_link_hash_defweak));
2684 s = bfd_get_linker_section (dynobj, ".rela.bss");
2685 BFD_ASSERT (s != NULL);
2687 rel.r_offset = (h->root.u.def.value
2688 + h->root.u.def.section->output_section->vma
2689 + h->root.u.def.section->output_offset);
2690 rel.r_info = ELF32_R_INFO (h->dynindx, R_CR16_GOT_REGREL20);
2692 bfd_elf32_swap_reloca_out (output_bfd, &rel,
2693 (bfd_byte *) ((Elf32_External_Rela *) s->contents
2698 /* Mark _DYNAMIC and _GLOBAL_OFFSET_TABLE_ as absolute. */
2699 if (h == elf_hash_table (info)->hdynamic
2700 || h == elf_hash_table (info)->hgot)
2701 sym->st_shndx = SHN_ABS;
2706 /* Finish up the dynamic sections. */
2709 _bfd_cr16_elf_finish_dynamic_sections (bfd * output_bfd,
2710 struct bfd_link_info * info)
2716 dynobj = elf_hash_table (info)->dynobj;
2718 sgot = bfd_get_linker_section (dynobj, ".got.plt");
2719 BFD_ASSERT (sgot != NULL);
2720 sdyn = bfd_get_linker_section (dynobj, ".dynamic");
2722 if (elf_hash_table (info)->dynamic_sections_created)
2724 Elf32_External_Dyn * dyncon;
2725 Elf32_External_Dyn * dynconend;
2727 BFD_ASSERT (sdyn != NULL);
2729 dyncon = (Elf32_External_Dyn *) sdyn->contents;
2730 dynconend = (Elf32_External_Dyn *) (sdyn->contents + sdyn->size);
2732 for (; dyncon < dynconend; dyncon++)
2734 Elf_Internal_Dyn dyn;
2738 bfd_elf32_swap_dyn_in (dynobj, dyncon, &dyn);
2752 s = bfd_get_section_by_name (output_bfd, name);
2753 BFD_ASSERT (s != NULL);
2754 dyn.d_un.d_ptr = s->vma;
2755 bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon);
2759 s = bfd_get_section_by_name (output_bfd, ".rela.plt");
2760 BFD_ASSERT (s != NULL);
2761 dyn.d_un.d_val = s->size;
2762 bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon);
2766 /* My reading of the SVR4 ABI indicates that the
2767 procedure linkage table relocs (DT_JMPREL) should be
2768 included in the overall relocs (DT_RELA). This is
2769 what Solaris does. However, UnixWare can not handle
2770 that case. Therefore, we override the DT_RELASZ entry
2771 here to make it not include the JMPREL relocs. Since
2772 the linker script arranges for .rela.plt to follow all
2773 other relocation sections, we don't have to worry
2774 about changing the DT_RELA entry. */
2775 s = bfd_get_section_by_name (output_bfd, ".rela.plt");
2777 dyn.d_un.d_val -= s->size;
2778 bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon);
2785 /* Fill in the first three entries in the global offset table. */
2789 bfd_put_32 (output_bfd, (bfd_vma) 0, sgot->contents);
2791 bfd_put_32 (output_bfd,
2792 sdyn->output_section->vma + sdyn->output_offset,
2796 elf_section_data (sgot->output_section)->this_hdr.sh_entsize = 4;
2801 /* Given a .data.rel section and a .emreloc in-memory section, store
2802 relocation information into the .emreloc section which can be
2803 used at runtime to relocate the section. This is called by the
2804 linker when the --embedded-relocs switch is used. This is called
2805 after the add_symbols entry point has been called for all the
2806 objects, and before the final_link entry point is called. */
2809 bfd_cr16_elf32_create_embedded_relocs (bfd *abfd,
2810 struct bfd_link_info *info,
2815 Elf_Internal_Shdr *symtab_hdr;
2816 Elf_Internal_Sym *isymbuf = NULL;
2817 Elf_Internal_Rela *internal_relocs = NULL;
2818 Elf_Internal_Rela *irel, *irelend;
2822 BFD_ASSERT (! bfd_link_relocatable (info));
2826 if (datasec->reloc_count == 0)
2829 symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
2831 /* Get a copy of the native relocations. */
2832 internal_relocs = (_bfd_elf_link_read_relocs
2833 (abfd, datasec, NULL, NULL, info->keep_memory));
2834 if (internal_relocs == NULL)
2837 amt = (bfd_size_type) datasec->reloc_count * 8;
2838 relsec->contents = (bfd_byte *) bfd_alloc (abfd, amt);
2839 if (relsec->contents == NULL)
2842 p = relsec->contents;
2844 irelend = internal_relocs + datasec->reloc_count;
2845 for (irel = internal_relocs; irel < irelend; irel++, p += 8)
2847 asection *targetsec;
2849 /* We are going to write a four byte longword into the runtime
2850 reloc section. The longword will be the address in the data
2851 section which must be relocated. It is followed by the name
2852 of the target section NUL-padded or truncated to 8
2855 /* We can only relocate absolute longword relocs at run time. */
2856 if (!((ELF32_R_TYPE (irel->r_info) == (int) R_CR16_NUM32a)
2857 || (ELF32_R_TYPE (irel->r_info) == (int) R_CR16_NUM32)))
2859 *errmsg = _("unsupported reloc type");
2860 bfd_set_error (bfd_error_bad_value);
2864 /* Get the target section referred to by the reloc. */
2865 if (ELF32_R_SYM (irel->r_info) < symtab_hdr->sh_info)
2867 /* A local symbol. */
2868 Elf_Internal_Sym *isym;
2870 /* Read this BFD's local symbols if we haven't done so already. */
2871 if (isymbuf == NULL)
2873 isymbuf = (Elf_Internal_Sym *) symtab_hdr->contents;
2874 if (isymbuf == NULL)
2875 isymbuf = bfd_elf_get_elf_syms (abfd, symtab_hdr,
2876 symtab_hdr->sh_info, 0,
2878 if (isymbuf == NULL)
2882 isym = isymbuf + ELF32_R_SYM (irel->r_info);
2883 targetsec = bfd_section_from_elf_index (abfd, isym->st_shndx);
2888 struct elf_link_hash_entry *h;
2890 /* An external symbol. */
2891 indx = ELF32_R_SYM (irel->r_info) - symtab_hdr->sh_info;
2892 h = elf_sym_hashes (abfd)[indx];
2893 BFD_ASSERT (h != NULL);
2894 if (h->root.type == bfd_link_hash_defined
2895 || h->root.type == bfd_link_hash_defweak)
2896 targetsec = h->root.u.def.section;
2901 bfd_put_32 (abfd, irel->r_offset + datasec->output_offset, p);
2902 memset (p + 4, 0, 4);
2903 if ((ELF32_R_TYPE (irel->r_info) == (int) R_CR16_NUM32a)
2904 && (targetsec != NULL) )
2905 strncpy ((char *) p + 4, targetsec->output_section->name, 4);
2908 if (isymbuf != NULL && symtab_hdr->contents != (unsigned char *) isymbuf)
2910 if (internal_relocs != NULL
2911 && elf_section_data (datasec)->relocs != internal_relocs)
2912 free (internal_relocs);
2916 if (isymbuf != NULL && symtab_hdr->contents != (unsigned char *) isymbuf)
2918 if (internal_relocs != NULL
2919 && elf_section_data (datasec)->relocs != internal_relocs)
2920 free (internal_relocs);
2925 /* Classify relocation types, such that combreloc can sort them
2928 static enum elf_reloc_type_class
2929 _bfd_cr16_elf_reloc_type_class (const struct bfd_link_info *info ATTRIBUTE_UNUSED,
2930 const asection *rel_sec ATTRIBUTE_UNUSED,
2931 const Elf_Internal_Rela *rela)
2933 switch ((int) ELF32_R_TYPE (rela->r_info))
2935 case R_CR16_GOT_REGREL20:
2936 case R_CR16_GOTC_REGREL20:
2937 return reloc_class_relative;
2939 return reloc_class_normal;
2943 /* Definitions for setting CR16 target vector. */
2944 #define TARGET_LITTLE_SYM cr16_elf32_vec
2945 #define TARGET_LITTLE_NAME "elf32-cr16"
2946 #define ELF_ARCH bfd_arch_cr16
2947 #define ELF_MACHINE_CODE EM_CR16
2948 #define ELF_MACHINE_ALT1 EM_CR16_OLD
2949 #define ELF_MAXPAGESIZE 0x1
2950 #define elf_symbol_leading_char '_'
2952 #define bfd_elf32_bfd_reloc_type_lookup elf_cr16_reloc_type_lookup
2953 #define bfd_elf32_bfd_reloc_name_lookup elf_cr16_reloc_name_lookup
2954 #define elf_info_to_howto elf_cr16_info_to_howto
2955 #define elf_info_to_howto_rel 0
2956 #define elf_backend_relocate_section elf32_cr16_relocate_section
2957 #define bfd_elf32_bfd_relax_section elf32_cr16_relax_section
2958 #define bfd_elf32_bfd_get_relocated_section_contents \
2959 elf32_cr16_get_relocated_section_contents
2960 #define elf_backend_gc_mark_hook elf32_cr16_gc_mark_hook
2961 #define elf_backend_gc_sweep_hook elf32_cr16_gc_sweep_hook
2962 #define elf_backend_can_gc_sections 1
2963 #define elf_backend_rela_normal 1
2964 #define elf_backend_check_relocs cr16_elf_check_relocs
2965 /* So we can set bits in e_flags. */
2966 #define elf_backend_final_write_processing \
2967 _bfd_cr16_elf_final_write_processing
2968 #define elf_backend_object_p _bfd_cr16_elf_object_p
2970 #define bfd_elf32_bfd_merge_private_bfd_data \
2971 _bfd_cr16_elf_merge_private_bfd_data
2974 #define bfd_elf32_bfd_link_hash_table_create \
2975 elf32_cr16_link_hash_table_create
2977 #define elf_backend_create_dynamic_sections \
2978 _bfd_cr16_elf_create_dynamic_sections
2979 #define elf_backend_adjust_dynamic_symbol \
2980 _bfd_cr16_elf_adjust_dynamic_symbol
2981 #define elf_backend_size_dynamic_sections \
2982 _bfd_cr16_elf_size_dynamic_sections
2983 #define elf_backend_omit_section_dynsym \
2984 ((bfd_boolean (*) (bfd *, struct bfd_link_info *, asection *)) bfd_true)
2985 #define elf_backend_finish_dynamic_symbol \
2986 _bfd_cr16_elf_finish_dynamic_symbol
2987 #define elf_backend_finish_dynamic_sections \
2988 _bfd_cr16_elf_finish_dynamic_sections
2990 #define elf_backend_reloc_type_class _bfd_cr16_elf_reloc_type_class
2993 #define elf_backend_want_got_plt 1
2994 #define elf_backend_plt_readonly 1
2995 #define elf_backend_want_plt_sym 0
2996 #define elf_backend_got_header_size 12
2998 #include "elf32-target.h"