1 /* BFD back-end for National Semiconductor's CR16 ELF
2 Copyright 2007, 2008, 2009, 2010, 2012 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_section_by_name (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_with_flags (abfd, ".got", flags);
611 || ! bfd_set_section_alignment (abfd, s, ptralign))
614 if (bed->want_got_plt)
616 s = bfd_make_section_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 BFD_ASSERT (r_type < (unsigned int) R_CR16_MAX);
677 cache_ptr->howto = cr16_elf_howto_table + r_type;
680 /* Look through the relocs for a section during the first phase.
681 Since we don't do .gots or .plts, we just need to consider the
682 virtual table relocs for gc. */
685 cr16_elf_check_relocs (bfd *abfd, struct bfd_link_info *info, asection *sec,
686 const Elf_Internal_Rela *relocs)
688 Elf_Internal_Shdr *symtab_hdr;
689 Elf_Internal_Sym * isymbuf = NULL;
690 struct elf_link_hash_entry **sym_hashes, **sym_hashes_end;
691 const Elf_Internal_Rela *rel;
692 const Elf_Internal_Rela *rel_end;
694 bfd_vma * local_got_offsets;
700 bfd_boolean result = FALSE;
702 if (info->relocatable)
705 symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
706 sym_hashes = elf_sym_hashes (abfd);
707 sym_hashes_end = sym_hashes + symtab_hdr->sh_size/sizeof (Elf32_External_Sym);
708 if (!elf_bad_symtab (abfd))
709 sym_hashes_end -= symtab_hdr->sh_info;
711 dynobj = elf_hash_table (info)->dynobj;
712 local_got_offsets = elf_local_got_offsets (abfd);
713 rel_end = relocs + sec->reloc_count;
714 for (rel = relocs; rel < rel_end; rel++)
716 struct elf_link_hash_entry *h;
717 unsigned long r_symndx;
719 r_symndx = ELF32_R_SYM (rel->r_info);
720 if (r_symndx < symtab_hdr->sh_info)
724 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
725 while (h->root.type == bfd_link_hash_indirect
726 || h->root.type == bfd_link_hash_warning)
727 h = (struct elf_link_hash_entry *) h->root.u.i.link;
730 /* Some relocs require a global offset table. */
733 switch (ELF32_R_TYPE (rel->r_info))
735 case R_CR16_GOT_REGREL20:
736 case R_CR16_GOTC_REGREL20:
737 elf_hash_table (info)->dynobj = dynobj = abfd;
738 if (! _bfd_cr16_elf_create_got_section (dynobj, info))
747 switch (ELF32_R_TYPE (rel->r_info))
749 case R_CR16_GOT_REGREL20:
750 case R_CR16_GOTC_REGREL20:
751 /* This symbol requires a global offset table entry. */
755 sgot = bfd_get_section_by_name (dynobj, ".got");
756 BFD_ASSERT (sgot != NULL);
760 && (h != NULL || info->executable))
762 srelgot = bfd_get_section_by_name (dynobj, ".rela.got");
765 srelgot = bfd_make_section_with_flags (dynobj,
774 || ! bfd_set_section_alignment (dynobj, srelgot, 2))
781 if (h->got.offset != (bfd_vma) -1)
782 /* We have already allocated space in the .got. */
785 h->got.offset = sgot->size;
787 /* Make sure this symbol is output as a dynamic symbol. */
788 if (h->dynindx == -1)
790 if (! bfd_elf_link_record_dynamic_symbol (info, h))
794 srelgot->size += sizeof (Elf32_External_Rela);
798 /* This is a global offset table entry for a local
800 if (local_got_offsets == NULL)
805 size = symtab_hdr->sh_info * sizeof (bfd_vma);
806 local_got_offsets = (bfd_vma *) bfd_alloc (abfd, size);
808 if (local_got_offsets == NULL)
811 elf_local_got_offsets (abfd) = local_got_offsets;
813 for (i = 0; i < symtab_hdr->sh_info; i++)
814 local_got_offsets[i] = (bfd_vma) -1;
817 if (local_got_offsets[r_symndx] != (bfd_vma) -1)
818 /* We have already allocated space in the .got. */
821 local_got_offsets[r_symndx] = sgot->size;
823 if (info->executable)
824 /* If we are generating a shared object, we need to
825 output a R_CR16_RELATIVE reloc so that the dynamic
826 linker can adjust this GOT entry. */
827 srelgot->size += sizeof (Elf32_External_Rela);
844 /* Perform a relocation as part of a final link. */
846 static bfd_reloc_status_type
847 cr16_elf_final_link_relocate (reloc_howto_type *howto,
849 bfd *output_bfd ATTRIBUTE_UNUSED,
850 asection *input_section,
855 struct elf_link_hash_entry * h,
856 unsigned long symndx ATTRIBUTE_UNUSED,
857 struct bfd_link_info *info ATTRIBUTE_UNUSED,
858 asection *sec ATTRIBUTE_UNUSED,
859 int is_local ATTRIBUTE_UNUSED)
861 unsigned short r_type = howto->type;
862 bfd_byte *hit_data = contents + offset;
863 bfd_vma reloc_bits, check, Rvalue1;
866 dynobj = elf_hash_table (info)->dynobj;
880 case R_CR16_REGREL4a:
881 case R_CR16_REGREL14:
882 case R_CR16_REGREL14a:
883 case R_CR16_REGREL16:
884 case R_CR16_REGREL20:
885 case R_CR16_REGREL20a:
886 case R_CR16_GOT_REGREL20:
887 case R_CR16_GOTC_REGREL20:
891 /* 'hit_data' is relative to the start of the instruction, not the
892 relocation offset. Advance it to account for the exact offset. */
912 case R_CR16_SWITCH16:
913 case R_CR16_SWITCH32:
914 /* We only care about the addend, where the difference between
915 expressions is kept. */
922 if (howto->pc_relative)
924 /* Subtract the address of the section containing the location. */
925 Rvalue -= (input_section->output_section->vma
926 + input_section->output_offset);
927 /* Subtract the position of the location within the section. */
931 /* Add in supplied addend. */
934 /* Complain if the bitfield overflows, whether it is considered
935 as signed or unsigned. */
936 check = Rvalue >> howto->rightshift;
938 /* Assumes two's complement. This expression avoids
939 overflow if howto->bitsize is the number of bits in
941 reloc_bits = (((1 << (howto->bitsize - 1)) - 1) << 1) | 1;
943 /* For GOT and GOTC relocs no boundary checks applied. */
944 if (!((r_type == R_CR16_GOT_REGREL20)
945 || (r_type == R_CR16_GOTC_REGREL20)))
947 if (((bfd_vma) check & ~reloc_bits) != 0
948 && (((bfd_vma) check & ~reloc_bits)
949 != (-(bfd_vma) 1 & ~reloc_bits)))
951 /* The above right shift is incorrect for a signed
952 value. See if turning on the upper bits fixes the
954 if (howto->rightshift && (bfd_signed_vma) Rvalue < 0)
956 check |= ((bfd_vma) - 1
958 >> howto->rightshift));
960 if (((bfd_vma) check & ~reloc_bits)
961 != (-(bfd_vma) 1 & ~reloc_bits))
962 return bfd_reloc_overflow;
965 return bfd_reloc_overflow;
968 /* Drop unwanted bits from the value we are relocating to. */
969 Rvalue >>= (bfd_vma) howto->rightshift;
971 /* Apply dst_mask to select only relocatable part of the insn. */
972 Rvalue &= howto->dst_mask;
978 if (r_type == R_CR16_DISP8)
980 Rvalue1 = bfd_get_16 (input_bfd, hit_data);
981 Rvalue = ((Rvalue1 & 0xf000) | ((Rvalue << 4) & 0xf00)
982 | (Rvalue1 & 0x00f0) | (Rvalue & 0xf));
983 bfd_put_16 (input_bfd, Rvalue, hit_data);
985 else if (r_type == R_CR16_IMM4)
987 Rvalue1 = bfd_get_16 (input_bfd, hit_data);
988 Rvalue = (((Rvalue1 & 0xff) << 8) | ((Rvalue << 4) & 0xf0)
989 | ((Rvalue1 & 0x0f00) >> 8));
990 bfd_put_16 (input_bfd, Rvalue, hit_data);
992 else if (r_type == R_CR16_DISP4)
994 Rvalue1 = bfd_get_16 (input_bfd, hit_data);
995 Rvalue = (Rvalue1 | ((Rvalue & 0xf) << 4));
996 bfd_put_16 (input_bfd, Rvalue, hit_data);
1000 bfd_put_8 (input_bfd, (unsigned char) Rvalue, hit_data);
1005 if (r_type == R_CR16_DISP16)
1007 Rvalue |= (bfd_get_16 (input_bfd, hit_data));
1008 Rvalue = ((Rvalue & 0xfffe) | ((Rvalue >> 16) & 0x1));
1010 if (r_type == R_CR16_IMM16)
1012 Rvalue1 = bfd_get_16 (input_bfd, hit_data);
1014 /* Add or subtract the offset value. */
1015 if (Rvalue1 & 0x8000)
1016 Rvalue -= (~Rvalue1 + 1) & 0xffff;
1020 /* Check for range. */
1021 if ((long) Rvalue > 0xffff || (long) Rvalue < 0x0)
1022 return bfd_reloc_overflow;
1025 bfd_put_16 (input_bfd, Rvalue, hit_data);
1029 if ((r_type == R_CR16_ABS20) || (r_type == R_CR16_IMM20))
1031 Rvalue1 = (bfd_get_16 (input_bfd, hit_data + 2)
1032 | (((bfd_get_16 (input_bfd, hit_data) & 0xf) <<16)));
1034 /* Add or subtract the offset value. */
1035 if (Rvalue1 & 0x80000)
1036 Rvalue -= (~Rvalue1 + 1) & 0xfffff;
1040 /* Check for range. */
1041 if ((long) Rvalue > 0xfffff || (long) Rvalue < 0x0)
1042 return bfd_reloc_overflow;
1044 bfd_put_16 (input_bfd, ((bfd_get_16 (input_bfd, hit_data) & 0xfff0)
1045 | ((Rvalue >> 16) & 0xf)), hit_data);
1046 bfd_put_16 (input_bfd, (Rvalue) & 0xffff, hit_data + 2);
1048 else if (r_type == R_CR16_GOT_REGREL20)
1050 asection * sgot = bfd_get_section_by_name (dynobj, ".got");
1056 off = h->got.offset;
1057 BFD_ASSERT (off != (bfd_vma) -1);
1059 if (! elf_hash_table (info)->dynamic_sections_created
1060 || SYMBOL_REFERENCES_LOCAL (info, h))
1061 /* This is actually a static link, or it is a
1062 -Bsymbolic link and the symbol is defined
1063 locally, or the symbol was forced to be local
1064 because of a version file. We must initialize
1065 this entry in the global offset table.
1066 When doing a dynamic link, we create a .rela.got
1067 relocation entry to initialize the value. This
1068 is done in the finish_dynamic_symbol routine. */
1069 bfd_put_32 (output_bfd, Rvalue, sgot->contents + off);
1071 Rvalue = sgot->output_offset + off;
1077 off = elf_local_got_offsets (input_bfd)[symndx];
1078 bfd_put_32 (output_bfd,Rvalue, sgot->contents + off);
1080 Rvalue = sgot->output_offset + off;
1085 /* REVISIT: if ((long) Rvalue > 0xffffff ||
1086 (long) Rvalue < -0x800000). */
1087 if ((long) Rvalue > 0xffffff || (long) Rvalue < 0)
1088 return bfd_reloc_overflow;
1091 bfd_put_16 (input_bfd, (bfd_get_16 (input_bfd, hit_data))
1092 | (((Rvalue >> 16) & 0xf) << 8), hit_data);
1093 bfd_put_16 (input_bfd, (Rvalue) & 0xffff, hit_data + 2);
1096 else if (r_type == R_CR16_GOTC_REGREL20)
1099 sgot = bfd_get_section_by_name (dynobj, ".got");
1105 off = h->got.offset;
1106 BFD_ASSERT (off != (bfd_vma) -1);
1108 Rvalue >>=1; /* For code symbols. */
1110 if (! elf_hash_table (info)->dynamic_sections_created
1111 || SYMBOL_REFERENCES_LOCAL (info, h))
1112 /* This is actually a static link, or it is a
1113 -Bsymbolic link and the symbol is defined
1114 locally, or the symbol was forced to be local
1115 because of a version file. We must initialize
1116 this entry in the global offset table.
1117 When doing a dynamic link, we create a .rela.got
1118 relocation entry to initialize the value. This
1119 is done in the finish_dynamic_symbol routine. */
1120 bfd_put_32 (output_bfd, Rvalue, sgot->contents + off);
1122 Rvalue = sgot->output_offset + off;
1128 off = elf_local_got_offsets (input_bfd)[symndx];
1130 bfd_put_32 (output_bfd,Rvalue, sgot->contents + off);
1131 Rvalue = sgot->output_offset + off;
1136 /* Check if any value in DISP. */
1137 Rvalue1 =((bfd_get_32 (input_bfd, hit_data) >>16)
1138 | (((bfd_get_32 (input_bfd, hit_data) & 0xfff) >> 8) <<16));
1140 /* Add or subtract the offset value. */
1141 if (Rvalue1 & 0x80000)
1142 Rvalue -= (~Rvalue1 + 1) & 0xfffff;
1146 /* Check for range. */
1147 /* REVISIT: if ((long) Rvalue > 0xffffff
1148 || (long) Rvalue < -0x800000). */
1149 if ((long) Rvalue > 0xffffff || (long) Rvalue < 0)
1150 return bfd_reloc_overflow;
1152 bfd_put_16 (input_bfd, (bfd_get_16 (input_bfd, hit_data))
1153 | (((Rvalue >> 16) & 0xf) << 8), hit_data);
1154 bfd_put_16 (input_bfd, (Rvalue) & 0xffff, hit_data + 2);
1158 if (r_type == R_CR16_ABS24)
1160 Rvalue1 = ((bfd_get_32 (input_bfd, hit_data) >> 16)
1161 | (((bfd_get_32 (input_bfd, hit_data) & 0xfff) >> 8) <<16)
1162 | (((bfd_get_32 (input_bfd, hit_data) & 0xf) <<20)));
1164 /* Add or subtract the offset value. */
1165 if (Rvalue1 & 0x800000)
1166 Rvalue -= (~Rvalue1 + 1) & 0xffffff;
1170 /* Check for Range. */
1171 if ((long) Rvalue > 0xffffff || (long) Rvalue < 0x0)
1172 return bfd_reloc_overflow;
1174 Rvalue = ((((Rvalue >> 20) & 0xf) | (((Rvalue >> 16) & 0xf)<<8)
1175 | (bfd_get_32 (input_bfd, hit_data) & 0xf0f0))
1176 | ((Rvalue & 0xffff) << 16));
1178 else if (r_type == R_CR16_DISP24)
1180 Rvalue = ((((Rvalue >> 20)& 0xf) | (((Rvalue >>16) & 0xf)<<8)
1181 | (bfd_get_16 (input_bfd, hit_data)))
1182 | (((Rvalue & 0xfffe) | ((Rvalue >> 24) & 0x1)) << 16));
1184 else if ((r_type == R_CR16_IMM32) || (r_type == R_CR16_IMM32a))
1186 Rvalue1 =((((bfd_get_32 (input_bfd, hit_data)) >> 16) &0xffff)
1187 | (((bfd_get_32 (input_bfd, hit_data)) &0xffff)) << 16);
1189 /* Add or subtract the offset value. */
1190 if (Rvalue1 & 0x80000000)
1191 Rvalue -= (~Rvalue1 + 1) & 0xffffffff;
1195 /* Check for range. */
1196 if (Rvalue > 0xffffffff || (long) Rvalue < 0x0)
1197 return bfd_reloc_overflow;
1199 Rvalue = (((Rvalue >> 16)& 0xffff) | (Rvalue & 0xffff) << 16);
1201 else if (r_type == R_CR16_DISP24a)
1203 Rvalue = (((Rvalue & 0xfffffe) | (Rvalue >> 23)));
1204 Rvalue = ((Rvalue >> 16) & 0xff) | ((Rvalue & 0xffff) << 16)
1205 | (bfd_get_32 (input_bfd, hit_data));
1207 else if ((r_type == R_CR16_REGREL20)
1208 || (r_type == R_CR16_REGREL20a))
1210 Rvalue1 = ((bfd_get_32 (input_bfd, hit_data) >> 16)
1211 | (((bfd_get_32 (input_bfd, hit_data) & 0xfff) >> 8) <<16));
1212 /* Add or subtract the offset value. */
1213 if (Rvalue1 & 0x80000)
1214 Rvalue -= (~Rvalue1 + 1) & 0xfffff;
1218 /* Check for range. */
1219 if ((long) Rvalue > 0xfffff || (long) Rvalue < 0x0)
1220 return bfd_reloc_overflow;
1222 Rvalue = (((((Rvalue >> 20)& 0xf) | (((Rvalue >>16) & 0xf)<<8)
1223 | ((Rvalue & 0xffff) << 16)))
1224 | (bfd_get_32 (input_bfd, hit_data) & 0xf0ff));
1227 else if (r_type == R_CR16_NUM32)
1229 Rvalue1 = (bfd_get_32 (input_bfd, hit_data));
1231 /* Add or subtract the offset value */
1232 if (Rvalue1 & 0x80000000)
1233 Rvalue -= (~Rvalue1 + 1) & 0xffffffff;
1237 /* Check for Ranga */
1238 if (Rvalue > 0xffffffff)
1239 return bfd_reloc_overflow;
1242 bfd_put_32 (input_bfd, Rvalue, hit_data);
1247 return bfd_reloc_notsupported;
1250 return bfd_reloc_ok;
1253 /* Delete some bytes from a section while relaxing. */
1256 elf32_cr16_relax_delete_bytes (struct bfd_link_info *link_info, bfd *abfd,
1257 asection *sec, bfd_vma addr, int count)
1259 Elf_Internal_Shdr *symtab_hdr;
1260 unsigned int sec_shndx;
1262 Elf_Internal_Rela *irel, *irelend;
1264 Elf_Internal_Sym *isym;
1265 Elf_Internal_Sym *isymend;
1266 struct elf_link_hash_entry **sym_hashes;
1267 struct elf_link_hash_entry **end_hashes;
1268 struct elf_link_hash_entry **start_hashes;
1269 unsigned int symcount;
1271 sec_shndx = _bfd_elf_section_from_bfd_section (abfd, sec);
1273 contents = elf_section_data (sec)->this_hdr.contents;
1277 irel = elf_section_data (sec)->relocs;
1278 irelend = irel + sec->reloc_count;
1280 /* Actually delete the bytes. */
1281 memmove (contents + addr, contents + addr + count,
1282 (size_t) (toaddr - addr - count));
1285 /* Adjust all the relocs. */
1286 for (irel = elf_section_data (sec)->relocs; irel < irelend; irel++)
1287 /* Get the new reloc address. */
1288 if ((irel->r_offset > addr && irel->r_offset < toaddr))
1289 irel->r_offset -= count;
1291 /* Adjust the local symbols defined in this section. */
1292 symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
1293 isym = (Elf_Internal_Sym *) symtab_hdr->contents;
1294 for (isymend = isym + symtab_hdr->sh_info; isym < isymend; isym++)
1296 if (isym->st_shndx == sec_shndx
1297 && isym->st_value > addr
1298 && isym->st_value < toaddr)
1300 /* Adjust the addend of SWITCH relocations in this section,
1301 which reference this local symbol. */
1303 for (irel = elf_section_data (sec)->relocs; irel < irelend; irel++)
1305 unsigned long r_symndx;
1306 Elf_Internal_Sym *rsym;
1307 bfd_vma addsym, subsym;
1309 /* Skip if not a SWITCH relocation. */
1310 if (ELF32_R_TYPE (irel->r_info) != (int) R_CR16_SWITCH8
1311 && ELF32_R_TYPE (irel->r_info) != (int) R_CR16_SWITCH16
1312 && ELF32_R_TYPE (irel->r_info) != (int) R_CR16_SWITCH32)
1315 r_symndx = ELF32_R_SYM (irel->r_info);
1316 rsym = (Elf_Internal_Sym *) symtab_hdr->contents + r_symndx;
1318 /* Skip if not the local adjusted symbol. */
1322 addsym = isym->st_value;
1323 subsym = addsym - irel->r_addend;
1325 /* Fix the addend only when -->> (addsym > addr >= subsym). */
1327 irel->r_addend -= count;
1333 isym->st_value -= count;
1337 /* Now adjust the global symbols defined in this section. */
1338 symcount = (symtab_hdr->sh_size / sizeof (Elf32_External_Sym)
1339 - symtab_hdr->sh_info);
1340 sym_hashes = start_hashes = elf_sym_hashes (abfd);
1341 end_hashes = sym_hashes + symcount;
1343 for (; sym_hashes < end_hashes; sym_hashes++)
1345 struct elf_link_hash_entry *sym_hash = *sym_hashes;
1347 /* The '--wrap SYMBOL' option is causing a pain when the object file,
1348 containing the definition of __wrap_SYMBOL, includes a direct
1349 call to SYMBOL as well. Since both __wrap_SYMBOL and SYMBOL reference
1350 the same symbol (which is __wrap_SYMBOL), but still exist as two
1351 different symbols in 'sym_hashes', we don't want to adjust
1352 the global symbol __wrap_SYMBOL twice.
1353 This check is only relevant when symbols are being wrapped. */
1354 if (link_info->wrap_hash != NULL)
1356 struct elf_link_hash_entry **cur_sym_hashes;
1358 /* Loop only over the symbols whom been already checked. */
1359 for (cur_sym_hashes = start_hashes; cur_sym_hashes < sym_hashes;
1361 /* If the current symbol is identical to 'sym_hash', that means
1362 the symbol was already adjusted (or at least checked). */
1363 if (*cur_sym_hashes == sym_hash)
1366 /* Don't adjust the symbol again. */
1367 if (cur_sym_hashes < sym_hashes)
1371 if ((sym_hash->root.type == bfd_link_hash_defined
1372 || sym_hash->root.type == bfd_link_hash_defweak)
1373 && sym_hash->root.u.def.section == sec
1374 && sym_hash->root.u.def.value > addr
1375 && sym_hash->root.u.def.value < toaddr)
1376 sym_hash->root.u.def.value -= count;
1382 /* Relocate a CR16 ELF section. */
1385 elf32_cr16_relocate_section (bfd *output_bfd, struct bfd_link_info *info,
1386 bfd *input_bfd, asection *input_section,
1387 bfd_byte *contents, Elf_Internal_Rela *relocs,
1388 Elf_Internal_Sym *local_syms,
1389 asection **local_sections)
1391 Elf_Internal_Shdr *symtab_hdr;
1392 struct elf_link_hash_entry **sym_hashes;
1393 Elf_Internal_Rela *rel, *relend;
1395 symtab_hdr = &elf_tdata (input_bfd)->symtab_hdr;
1396 sym_hashes = elf_sym_hashes (input_bfd);
1399 relend = relocs + input_section->reloc_count;
1400 for (; rel < relend; rel++)
1403 reloc_howto_type *howto;
1404 unsigned long r_symndx;
1405 Elf_Internal_Sym *sym;
1407 struct elf_link_hash_entry *h;
1409 bfd_reloc_status_type r;
1411 r_symndx = ELF32_R_SYM (rel->r_info);
1412 r_type = ELF32_R_TYPE (rel->r_info);
1413 howto = cr16_elf_howto_table + (r_type);
1418 if (r_symndx < symtab_hdr->sh_info)
1420 sym = local_syms + r_symndx;
1421 sec = local_sections[r_symndx];
1422 relocation = _bfd_elf_rela_local_sym (output_bfd, sym, &sec, rel);
1426 bfd_boolean unresolved_reloc, warned;
1428 RELOC_FOR_GLOBAL_SYMBOL (info, input_bfd, input_section, rel,
1429 r_symndx, symtab_hdr, sym_hashes,
1431 unresolved_reloc, warned);
1434 if (sec != NULL && discarded_section (sec))
1435 RELOC_AGAINST_DISCARDED_SECTION (info, input_bfd, input_section,
1436 rel, 1, relend, howto, 0, contents);
1438 if (info->relocatable)
1441 r = cr16_elf_final_link_relocate (howto, input_bfd, output_bfd,
1443 contents, rel->r_offset,
1444 relocation, rel->r_addend,
1445 (struct elf_link_hash_entry *) h,
1447 info, sec, h == NULL);
1449 if (r != bfd_reloc_ok)
1452 const char *msg = NULL;
1455 name = h->root.root.string;
1458 name = (bfd_elf_string_from_elf_section
1459 (input_bfd, symtab_hdr->sh_link, sym->st_name));
1460 if (name == NULL || *name == '\0')
1461 name = bfd_section_name (input_bfd, sec);
1466 case bfd_reloc_overflow:
1467 if (!((*info->callbacks->reloc_overflow)
1468 (info, (h ? &h->root : NULL), name, howto->name,
1469 (bfd_vma) 0, input_bfd, input_section,
1474 case bfd_reloc_undefined:
1475 if (!((*info->callbacks->undefined_symbol)
1476 (info, name, input_bfd, input_section,
1477 rel->r_offset, TRUE)))
1481 case bfd_reloc_outofrange:
1482 msg = _("internal error: out of range error");
1485 case bfd_reloc_notsupported:
1486 msg = _("internal error: unsupported relocation error");
1489 case bfd_reloc_dangerous:
1490 msg = _("internal error: dangerous error");
1494 msg = _("internal error: unknown error");
1498 if (!((*info->callbacks->warning)
1499 (info, msg, name, input_bfd, input_section,
1510 /* This is a version of bfd_generic_get_relocated_section_contents
1511 which uses elf32_cr16_relocate_section. */
1514 elf32_cr16_get_relocated_section_contents (bfd *output_bfd,
1515 struct bfd_link_info *link_info,
1516 struct bfd_link_order *link_order,
1518 bfd_boolean relocatable,
1521 Elf_Internal_Shdr *symtab_hdr;
1522 asection *input_section = link_order->u.indirect.section;
1523 bfd *input_bfd = input_section->owner;
1524 asection **sections = NULL;
1525 Elf_Internal_Rela *internal_relocs = NULL;
1526 Elf_Internal_Sym *isymbuf = NULL;
1528 /* We only need to handle the case of relaxing, or of having a
1529 particular set of section contents, specially. */
1531 || elf_section_data (input_section)->this_hdr.contents == NULL)
1532 return bfd_generic_get_relocated_section_contents (output_bfd, link_info,
1537 symtab_hdr = &elf_tdata (input_bfd)->symtab_hdr;
1539 memcpy (data, elf_section_data (input_section)->this_hdr.contents,
1540 (size_t) input_section->size);
1542 if ((input_section->flags & SEC_RELOC) != 0
1543 && input_section->reloc_count > 0)
1545 Elf_Internal_Sym *isym;
1546 Elf_Internal_Sym *isymend;
1550 internal_relocs = _bfd_elf_link_read_relocs (input_bfd, input_section,
1552 if (internal_relocs == NULL)
1555 if (symtab_hdr->sh_info != 0)
1557 isymbuf = (Elf_Internal_Sym *) symtab_hdr->contents;
1558 if (isymbuf == NULL)
1559 isymbuf = bfd_elf_get_elf_syms (input_bfd, symtab_hdr,
1560 symtab_hdr->sh_info, 0,
1562 if (isymbuf == NULL)
1566 amt = symtab_hdr->sh_info;
1567 amt *= sizeof (asection *);
1568 sections = bfd_malloc (amt);
1569 if (sections == NULL && amt != 0)
1572 isymend = isymbuf + symtab_hdr->sh_info;
1573 for (isym = isymbuf, secpp = sections; isym < isymend; ++isym, ++secpp)
1577 if (isym->st_shndx == SHN_UNDEF)
1578 isec = bfd_und_section_ptr;
1579 else if (isym->st_shndx == SHN_ABS)
1580 isec = bfd_abs_section_ptr;
1581 else if (isym->st_shndx == SHN_COMMON)
1582 isec = bfd_com_section_ptr;
1584 isec = bfd_section_from_elf_index (input_bfd, isym->st_shndx);
1589 if (! elf32_cr16_relocate_section (output_bfd, link_info, input_bfd,
1590 input_section, data, internal_relocs,
1594 if (sections != NULL)
1597 && symtab_hdr->contents != (unsigned char *) isymbuf)
1599 if (elf_section_data (input_section)->relocs != internal_relocs)
1600 free (internal_relocs);
1606 if (sections != NULL)
1609 && symtab_hdr->contents != (unsigned char *) isymbuf)
1611 if (internal_relocs != NULL
1612 && elf_section_data (input_section)->relocs != internal_relocs)
1613 free (internal_relocs);
1617 /* Assorted hash table functions. */
1619 /* Initialize an entry in the link hash table. */
1621 /* Create an entry in an CR16 ELF linker hash table. */
1623 static struct bfd_hash_entry *
1624 elf32_cr16_link_hash_newfunc (struct bfd_hash_entry *entry,
1625 struct bfd_hash_table *table,
1628 struct elf32_cr16_link_hash_entry *ret =
1629 (struct elf32_cr16_link_hash_entry *) entry;
1631 /* Allocate the structure if it has not already been allocated by a
1633 if (ret == (struct elf32_cr16_link_hash_entry *) NULL)
1634 ret = ((struct elf32_cr16_link_hash_entry *)
1635 bfd_hash_allocate (table,
1636 sizeof (struct elf32_cr16_link_hash_entry)));
1637 if (ret == (struct elf32_cr16_link_hash_entry *) NULL)
1638 return (struct bfd_hash_entry *) ret;
1640 /* Call the allocation method of the superclass. */
1641 ret = ((struct elf32_cr16_link_hash_entry *)
1642 _bfd_elf_link_hash_newfunc ((struct bfd_hash_entry *) ret,
1644 if (ret != (struct elf32_cr16_link_hash_entry *) NULL)
1646 ret->direct_calls = 0;
1647 ret->stack_size = 0;
1649 ret->movm_stack_size = 0;
1654 return (struct bfd_hash_entry *) ret;
1657 /* Create an cr16 ELF linker hash table. */
1659 static struct bfd_link_hash_table *
1660 elf32_cr16_link_hash_table_create (bfd *abfd)
1662 struct elf_link_hash_table *ret;
1663 bfd_size_type amt = sizeof (struct elf_link_hash_table);
1665 ret = (struct elf_link_hash_table *) bfd_malloc (amt);
1666 if (ret == (struct elf_link_hash_table *) NULL)
1669 if (!_bfd_elf_link_hash_table_init (ret, abfd,
1670 elf32_cr16_link_hash_newfunc,
1671 sizeof (struct elf32_cr16_link_hash_entry),
1681 /* Free an cr16 ELF linker hash table. */
1684 elf32_cr16_link_hash_table_free (struct bfd_link_hash_table *hash)
1686 struct elf_link_hash_table *ret
1687 = (struct elf_link_hash_table *) hash;
1689 _bfd_generic_link_hash_table_free
1690 ((struct bfd_link_hash_table *) ret);
1693 static unsigned long
1694 elf_cr16_mach (flagword flags)
1700 return bfd_mach_cr16;
1704 /* The final processing done just before writing out a CR16 ELF object
1705 file. This gets the CR16 architecture right based on the machine
1709 _bfd_cr16_elf_final_write_processing (bfd *abfd,
1710 bfd_boolean linker ATTRIBUTE_UNUSED)
1713 switch (bfd_get_mach (abfd))
1722 elf_elfheader (abfd)->e_flags |= val;
1727 _bfd_cr16_elf_object_p (bfd *abfd)
1729 bfd_default_set_arch_mach (abfd, bfd_arch_cr16,
1730 elf_cr16_mach (elf_elfheader (abfd)->e_flags));
1734 /* Merge backend specific data from an object file to the output
1735 object file when linking. */
1738 _bfd_cr16_elf_merge_private_bfd_data (bfd *ibfd, bfd *obfd)
1740 if (bfd_get_flavour (ibfd) != bfd_target_elf_flavour
1741 || bfd_get_flavour (obfd) != bfd_target_elf_flavour)
1744 if (bfd_get_arch (obfd) == bfd_get_arch (ibfd)
1745 && bfd_get_mach (obfd) < bfd_get_mach (ibfd))
1747 if (! bfd_set_arch_mach (obfd, bfd_get_arch (ibfd),
1748 bfd_get_mach (ibfd)))
1756 /* This function handles relaxing for the CR16.
1758 There's quite a few relaxing opportunites available on the CR16:
1760 * bcond:24 -> bcond:16 1 byte
1761 * bcond:16 -> bcond:8 1 byte
1762 * arithmetic imm32 -> arithmetic imm20 12 bits
1763 * arithmetic imm20/imm16 -> arithmetic imm4 12/16 bits
1765 Symbol- and reloc-reading infrastructure copied from elf-m10200.c. */
1768 elf32_cr16_relax_section (bfd *abfd, asection *sec,
1769 struct bfd_link_info *link_info, bfd_boolean *again)
1771 Elf_Internal_Shdr *symtab_hdr;
1772 Elf_Internal_Rela *internal_relocs;
1773 Elf_Internal_Rela *irel, *irelend;
1774 bfd_byte *contents = NULL;
1775 Elf_Internal_Sym *isymbuf = NULL;
1777 /* Assume nothing changes. */
1780 /* We don't have to do anything for a relocatable link, if
1781 this section does not have relocs, or if this is not a
1783 if (link_info->relocatable
1784 || (sec->flags & SEC_RELOC) == 0
1785 || sec->reloc_count == 0
1786 || (sec->flags & SEC_CODE) == 0)
1789 symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
1791 /* Get a copy of the native relocations. */
1792 internal_relocs = _bfd_elf_link_read_relocs (abfd, sec, NULL, NULL,
1793 link_info->keep_memory);
1794 if (internal_relocs == NULL)
1797 /* Walk through them looking for relaxing opportunities. */
1798 irelend = internal_relocs + sec->reloc_count;
1799 for (irel = internal_relocs; irel < irelend; irel++)
1803 /* If this isn't something that can be relaxed, then ignore
1805 if (ELF32_R_TYPE (irel->r_info) != (int) R_CR16_DISP16
1806 && ELF32_R_TYPE (irel->r_info) != (int) R_CR16_DISP24
1807 && ELF32_R_TYPE (irel->r_info) != (int) R_CR16_IMM32
1808 && ELF32_R_TYPE (irel->r_info) != (int) R_CR16_IMM20
1809 && ELF32_R_TYPE (irel->r_info) != (int) R_CR16_IMM16)
1812 /* Get the section contents if we haven't done so already. */
1813 if (contents == NULL)
1815 /* Get cached copy if it exists. */
1816 if (elf_section_data (sec)->this_hdr.contents != NULL)
1817 contents = elf_section_data (sec)->this_hdr.contents;
1818 /* Go get them off disk. */
1819 else if (!bfd_malloc_and_get_section (abfd, sec, &contents))
1823 /* Read this BFD's local symbols if we haven't done so already. */
1824 if (isymbuf == NULL && symtab_hdr->sh_info != 0)
1826 isymbuf = (Elf_Internal_Sym *) symtab_hdr->contents;
1827 if (isymbuf == NULL)
1828 isymbuf = bfd_elf_get_elf_syms (abfd, symtab_hdr,
1829 symtab_hdr->sh_info, 0,
1831 if (isymbuf == NULL)
1835 /* Get the value of the symbol referred to by the reloc. */
1836 if (ELF32_R_SYM (irel->r_info) < symtab_hdr->sh_info)
1838 /* A local symbol. */
1839 Elf_Internal_Sym *isym;
1842 isym = isymbuf + ELF32_R_SYM (irel->r_info);
1843 if (isym->st_shndx == SHN_UNDEF)
1844 sym_sec = bfd_und_section_ptr;
1845 else if (isym->st_shndx == SHN_ABS)
1846 sym_sec = bfd_abs_section_ptr;
1847 else if (isym->st_shndx == SHN_COMMON)
1848 sym_sec = bfd_com_section_ptr;
1850 sym_sec = bfd_section_from_elf_index (abfd, isym->st_shndx);
1851 symval = (isym->st_value
1852 + sym_sec->output_section->vma
1853 + sym_sec->output_offset);
1858 struct elf_link_hash_entry *h;
1860 /* An external symbol. */
1861 indx = ELF32_R_SYM (irel->r_info) - symtab_hdr->sh_info;
1862 h = elf_sym_hashes (abfd)[indx];
1863 BFD_ASSERT (h != NULL);
1865 if (h->root.type != bfd_link_hash_defined
1866 && h->root.type != bfd_link_hash_defweak)
1867 /* This appears to be a reference to an undefined
1868 symbol. Just ignore it--it will be caught by the
1869 regular reloc processing. */
1872 symval = (h->root.u.def.value
1873 + h->root.u.def.section->output_section->vma
1874 + h->root.u.def.section->output_offset);
1877 /* For simplicity of coding, we are going to modify the section
1878 contents, the section relocs, and the BFD symbol table. We
1879 must tell the rest of the code not to free up this
1880 information. It would be possible to instead create a table
1881 of changes which have to be made, as is done in coff-mips.c;
1882 that would be more work, but would require less memory when
1883 the linker is run. */
1885 /* Try to turn a 24 branch/call into a 16bit relative
1887 if (ELF32_R_TYPE (irel->r_info) == (int) R_CR16_DISP24)
1889 bfd_vma value = symval;
1891 /* Deal with pc-relative gunk. */
1892 value -= (sec->output_section->vma + sec->output_offset);
1893 value -= irel->r_offset;
1894 value += irel->r_addend;
1896 /* See if the value will fit in 16 bits, note the high value is
1897 0xfffe + 2 as the target will be two bytes closer if we are
1899 if ((long) value < 0x10000 && (long) value > -0x10002)
1903 /* Get the opcode. */
1904 code = (unsigned int) bfd_get_32 (abfd, contents + irel->r_offset);
1906 /* Verify it's a 'bcond' and fix the opcode. */
1907 if ((code & 0xffff) == 0x0010)
1908 bfd_put_16 (abfd, 0x1800 | ((0xf & (code >> 20)) << 4), contents + irel->r_offset);
1912 /* Note that we've changed the relocs, section contents, etc. */
1913 elf_section_data (sec)->relocs = internal_relocs;
1914 elf_section_data (sec)->this_hdr.contents = contents;
1915 symtab_hdr->contents = (unsigned char *) isymbuf;
1917 /* Fix the relocation's type. */
1918 irel->r_info = ELF32_R_INFO (ELF32_R_SYM (irel->r_info),
1921 /* Delete two bytes of data. */
1922 if (!elf32_cr16_relax_delete_bytes (link_info, abfd, sec,
1923 irel->r_offset + 2, 2))
1926 /* That will change things, so, we should relax again.
1927 Note that this is not required, and it may be slow. */
1932 /* Try to turn a 16bit pc-relative branch into an
1933 8bit pc-relative branch. */
1934 if (ELF32_R_TYPE (irel->r_info) == (int) R_CR16_DISP16)
1936 bfd_vma value = symval;
1938 /* Deal with pc-relative gunk. */
1939 value -= (sec->output_section->vma + sec->output_offset);
1940 value -= irel->r_offset;
1941 value += irel->r_addend;
1943 /* See if the value will fit in 8 bits, note the high value is
1944 0xfc + 2 as the target will be two bytes closer if we are
1946 /*if ((long) value < 0x1fa && (long) value > -0x100) REVISIT:range */
1947 if ((long) value < 0xfa && (long) value > -0x100)
1949 unsigned short code;
1951 /* Get the opcode. */
1952 code = (unsigned short) bfd_get_16 (abfd, contents + irel->r_offset);
1954 /* Verify it's a 'bcond' and fix the opcode. */
1955 if ((code & 0xff0f) == 0x1800)
1956 bfd_put_16 (abfd, (code & 0xf0f0), contents + irel->r_offset);
1960 /* Note that we've changed the relocs, section contents, etc. */
1961 elf_section_data (sec)->relocs = internal_relocs;
1962 elf_section_data (sec)->this_hdr.contents = contents;
1963 symtab_hdr->contents = (unsigned char *) isymbuf;
1965 /* Fix the relocation's type. */
1966 irel->r_info = ELF32_R_INFO (ELF32_R_SYM (irel->r_info),
1969 /* Delete two bytes of data. */
1970 if (!elf32_cr16_relax_delete_bytes (link_info, abfd, sec,
1971 irel->r_offset + 2, 2))
1974 /* That will change things, so, we should relax again.
1975 Note that this is not required, and it may be slow. */
1980 /* Try to turn a 32-bit IMM address into a 20/16-bit IMM address */
1981 if (ELF32_R_TYPE (irel->r_info) == (int) R_CR16_IMM32)
1983 bfd_vma value = symval;
1984 unsigned short is_add_mov = 0;
1987 /* Get the existing value from the mcode */
1988 value1 = ((bfd_get_32 (abfd, contents + irel->r_offset + 2) >> 16)
1989 |(((bfd_get_32 (abfd, contents + irel->r_offset + 2) & 0xffff) << 16)));
1991 /* See if the value will fit in 20 bits. */
1992 if ((long) (value + value1) < 0xfffff && (long) (value + value1) > 0)
1994 unsigned short code;
1996 /* Get the opcode. */
1997 code = (unsigned short) bfd_get_16 (abfd, contents + irel->r_offset);
1999 /* Verify it's a 'arithmetic ADDD or MOVD instruction'.
2000 For ADDD and MOVD only, convert to IMM32 -> IMM20. */
2002 if (((code & 0xfff0) == 0x0070) || ((code & 0xfff0) == 0x0020))
2007 /* Note that we've changed the relocs, section contents,
2009 elf_section_data (sec)->relocs = internal_relocs;
2010 elf_section_data (sec)->this_hdr.contents = contents;
2011 symtab_hdr->contents = (unsigned char *) isymbuf;
2013 /* Fix the opcode. */
2014 if ((code & 0xfff0) == 0x0070) /* For movd. */
2015 bfd_put_8 (abfd, 0x05, contents + irel->r_offset + 1);
2016 else /* code == 0x0020 for addd. */
2017 bfd_put_8 (abfd, 0x04, contents + irel->r_offset + 1);
2019 bfd_put_8 (abfd, (code & 0xf) << 4, contents + irel->r_offset);
2021 /* If existing value is nagavive adjust approriately
2022 place the 16-20bits (ie 4 bit) in new opcode,
2023 as the 0xffffxxxx, the higher 2 byte values removed. */
2024 if (value1 & 0x80000000)
2025 bfd_put_8 (abfd, (0x0f | (bfd_get_8(abfd, contents + irel->r_offset))), contents + irel->r_offset);
2027 bfd_put_8 (abfd, (((value1 >> 16)&0xf) | (bfd_get_8(abfd, contents + irel->r_offset))), contents + irel->r_offset);
2029 /* Fix the relocation's type. */
2030 irel->r_info = ELF32_R_INFO (ELF32_R_SYM (irel->r_info),
2033 /* Delete two bytes of data. */
2034 if (!elf32_cr16_relax_delete_bytes (link_info, abfd, sec,
2035 irel->r_offset + 2, 2))
2038 /* That will change things, so, we should relax again.
2039 Note that this is not required, and it may be slow. */
2044 /* See if the value will fit in 16 bits. */
2046 && ((long)(value + value1) < 0x7fff && (long)(value + value1) > 0))
2048 unsigned short code;
2050 /* Get the opcode. */
2051 code = (unsigned short) bfd_get_16 (abfd, contents + irel->r_offset);
2053 /* Note that we've changed the relocs, section contents, etc. */
2054 elf_section_data (sec)->relocs = internal_relocs;
2055 elf_section_data (sec)->this_hdr.contents = contents;
2056 symtab_hdr->contents = (unsigned char *) isymbuf;
2058 /* Fix the opcode. */
2059 if ((code & 0xf0) == 0x70) /* For movd. */
2060 bfd_put_8 (abfd, 0x54, contents + irel->r_offset + 1);
2061 else if ((code & 0xf0) == 0x20) /* For addd. */
2062 bfd_put_8 (abfd, 0x60, contents + irel->r_offset + 1);
2063 else if ((code & 0xf0) == 0x90) /* For cmpd. */
2064 bfd_put_8 (abfd, 0x56, contents + irel->r_offset + 1);
2068 bfd_put_8 (abfd, 0xb0 | (code & 0xf), contents + irel->r_offset);
2070 /* If existing value is nagavive adjust approriately
2071 place the 12-16bits (ie 4 bit) in new opcode,
2072 as the 0xfffffxxx, the higher 2 byte values removed. */
2073 if (value1 & 0x80000000)
2074 bfd_put_8 (abfd, (0x0f | (bfd_get_8(abfd, contents + irel->r_offset))), contents + irel->r_offset);
2076 bfd_put_16 (abfd, value1, contents + irel->r_offset + 2);
2079 /* Fix the relocation's type. */
2080 irel->r_info = ELF32_R_INFO (ELF32_R_SYM (irel->r_info),
2083 /* Delete two bytes of data. */
2084 if (!elf32_cr16_relax_delete_bytes (link_info, abfd, sec,
2085 irel->r_offset + 2, 2))
2088 /* That will change things, so, we should relax again.
2089 Note that this is not required, and it may be slow. */
2095 /* Try to turn a 16bit immediate address into a 4bit
2096 immediate address. */
2097 if ((ELF32_R_TYPE (irel->r_info) == (int) R_CR16_IMM20)
2098 || (ELF32_R_TYPE (irel->r_info) == (int) R_CR16_IMM16))
2100 bfd_vma value = symval;
2103 /* Get the existing value from the mcode */
2104 value1 = ((bfd_get_16 (abfd, contents + irel->r_offset + 2) & 0xffff));
2106 if (ELF32_R_TYPE (irel->r_info) == (int) R_CR16_IMM20)
2108 value1 |= ((bfd_get_16 (abfd, contents + irel->r_offset + 1) & 0xf000) << 0x4);
2111 /* See if the value will fit in 4 bits. */
2112 if ((((long) (value + value1)) < 0xf)
2113 && (((long) (value + value1)) > 0))
2115 unsigned short code;
2117 /* Get the opcode. */
2118 code = (unsigned short) bfd_get_16 (abfd, contents + irel->r_offset);
2120 /* Note that we've changed the relocs, section contents, etc. */
2121 elf_section_data (sec)->relocs = internal_relocs;
2122 elf_section_data (sec)->this_hdr.contents = contents;
2123 symtab_hdr->contents = (unsigned char *) isymbuf;
2125 /* Fix the opcode. */
2126 if (((code & 0x0f00) == 0x0400) || ((code & 0x0f00) == 0x0500))
2128 if ((code & 0x0f00) == 0x0400) /* For movd imm20. */
2129 bfd_put_8 (abfd, 0x60, contents + irel->r_offset);
2130 else /* For addd imm20. */
2131 bfd_put_8 (abfd, 0x54, contents + irel->r_offset);
2132 bfd_put_8 (abfd, (code & 0xf0) >> 4, contents + irel->r_offset + 1);
2136 if ((code & 0xfff0) == 0x56b0) /* For cmpd imm16. */
2137 bfd_put_8 (abfd, 0x56, contents + irel->r_offset);
2138 else if ((code & 0xfff0) == 0x54b0) /* For movd imm16. */
2139 bfd_put_8 (abfd, 0x54, contents + irel->r_offset);
2140 else if ((code & 0xfff0) == 0x58b0) /* For movb imm16. */
2141 bfd_put_8 (abfd, 0x58, contents + irel->r_offset);
2142 else if ((code & 0xfff0) == 0x5Ab0) /* For movw imm16. */
2143 bfd_put_8 (abfd, 0x5A, contents + irel->r_offset);
2144 else if ((code & 0xfff0) == 0x60b0) /* For addd imm16. */
2145 bfd_put_8 (abfd, 0x60, contents + irel->r_offset);
2146 else if ((code & 0xfff0) == 0x30b0) /* For addb imm16. */
2147 bfd_put_8 (abfd, 0x30, contents + irel->r_offset);
2148 else if ((code & 0xfff0) == 0x2Cb0) /* For addub imm16. */
2149 bfd_put_8 (abfd, 0x2C, contents + irel->r_offset);
2150 else if ((code & 0xfff0) == 0x32b0) /* For adduw imm16. */
2151 bfd_put_8 (abfd, 0x32, contents + irel->r_offset);
2152 else if ((code & 0xfff0) == 0x38b0) /* For subb imm16. */
2153 bfd_put_8 (abfd, 0x38, contents + irel->r_offset);
2154 else if ((code & 0xfff0) == 0x3Cb0) /* For subcb imm16. */
2155 bfd_put_8 (abfd, 0x3C, contents + irel->r_offset);
2156 else if ((code & 0xfff0) == 0x3Fb0) /* For subcw imm16. */
2157 bfd_put_8 (abfd, 0x3F, contents + irel->r_offset);
2158 else if ((code & 0xfff0) == 0x3Ab0) /* For subw imm16. */
2159 bfd_put_8 (abfd, 0x3A, contents + irel->r_offset);
2160 else if ((code & 0xfff0) == 0x50b0) /* For cmpb imm16. */
2161 bfd_put_8 (abfd, 0x50, contents + irel->r_offset);
2162 else if ((code & 0xfff0) == 0x52b0) /* For cmpw imm16. */
2163 bfd_put_8 (abfd, 0x52, contents + irel->r_offset);
2167 bfd_put_8 (abfd, (code & 0xf), contents + irel->r_offset + 1);
2170 /* Fix the relocation's type. */
2171 irel->r_info = ELF32_R_INFO (ELF32_R_SYM (irel->r_info),
2174 /* Delete two bytes of data. */
2175 if (!elf32_cr16_relax_delete_bytes (link_info, abfd, sec,
2176 irel->r_offset + 2, 2))
2179 /* That will change things, so, we should relax again.
2180 Note that this is not required, and it may be slow. */
2188 && symtab_hdr->contents != (unsigned char *) isymbuf)
2190 if (! link_info->keep_memory)
2193 /* Cache the symbols for elf_link_input_bfd. */
2194 symtab_hdr->contents = (unsigned char *) isymbuf;
2197 if (contents != NULL
2198 && elf_section_data (sec)->this_hdr.contents != contents)
2200 if (! link_info->keep_memory)
2203 /* Cache the section contents for elf_link_input_bfd. */
2204 elf_section_data (sec)->this_hdr.contents = contents;
2208 if (internal_relocs != NULL
2209 && elf_section_data (sec)->relocs != internal_relocs)
2210 free (internal_relocs);
2216 && symtab_hdr->contents != (unsigned char *) isymbuf)
2218 if (contents != NULL
2219 && elf_section_data (sec)->this_hdr.contents != contents)
2221 if (internal_relocs != NULL
2222 && elf_section_data (sec)->relocs != internal_relocs)
2223 free (internal_relocs);
2229 elf32_cr16_gc_mark_hook (asection *sec,
2230 struct bfd_link_info *info,
2231 Elf_Internal_Rela *rel,
2232 struct elf_link_hash_entry *h,
2233 Elf_Internal_Sym *sym)
2235 return _bfd_elf_gc_mark_hook (sec, info, rel, h, sym);
2238 /* Update the got entry reference counts for the section being removed. */
2241 elf32_cr16_gc_sweep_hook (bfd *abfd ATTRIBUTE_UNUSED,
2242 struct bfd_link_info *info ATTRIBUTE_UNUSED,
2243 asection *sec ATTRIBUTE_UNUSED,
2244 const Elf_Internal_Rela *relocs ATTRIBUTE_UNUSED)
2246 /* We don't support garbage collection of GOT and PLT relocs yet. */
2250 /* Create dynamic sections when linking against a dynamic object. */
2253 _bfd_cr16_elf_create_dynamic_sections (bfd *abfd, struct bfd_link_info *info)
2257 const struct elf_backend_data * bed = get_elf_backend_data (abfd);
2260 switch (bed->s->arch_size)
2271 bfd_set_error (bfd_error_bad_value);
2275 /* We need to create .plt, .rel[a].plt, .got, .got.plt, .dynbss, and
2276 .rel[a].bss sections. */
2278 flags = (SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS | SEC_IN_MEMORY
2279 | SEC_LINKER_CREATED);
2281 s = bfd_make_section_with_flags (abfd,
2282 (bed->default_use_rela_p
2283 ? ".rela.plt" : ".rel.plt"),
2284 flags | SEC_READONLY);
2286 || ! bfd_set_section_alignment (abfd, s, ptralign))
2289 if (! _bfd_cr16_elf_create_got_section (abfd, info))
2292 if (bed->want_dynbss)
2294 /* The .dynbss section is a place to put symbols which are defined
2295 by dynamic objects, are referenced by regular objects, and are
2296 not functions. We must allocate space for them in the process
2297 image and use a R_*_COPY reloc to tell the dynamic linker to
2298 initialize them at run time. The linker script puts the .dynbss
2299 section into the .bss section of the final image. */
2300 s = bfd_make_section_with_flags (abfd, ".dynbss",
2301 SEC_ALLOC | SEC_LINKER_CREATED);
2305 /* The .rel[a].bss section holds copy relocs. This section is not
2306 normally needed. We need to create it here, though, so that the
2307 linker will map it to an output section. We can't just create it
2308 only if we need it, because we will not know whether we need it
2309 until we have seen all the input files, and the first time the
2310 main linker code calls BFD after examining all the input files
2311 (size_dynamic_sections) the input sections have already been
2312 mapped to the output sections. If the section turns out not to
2313 be needed, we can discard it later. We will never need this
2314 section when generating a shared object, since they do not use
2316 if (! info->executable)
2318 s = bfd_make_section_with_flags (abfd,
2319 (bed->default_use_rela_p
2320 ? ".rela.bss" : ".rel.bss"),
2321 flags | SEC_READONLY);
2323 || ! bfd_set_section_alignment (abfd, s, ptralign))
2331 /* Adjust a symbol defined by a dynamic object and referenced by a
2332 regular object. The current definition is in some section of the
2333 dynamic object, but we're not including those sections. We have to
2334 change the definition to something the rest of the link can
2338 _bfd_cr16_elf_adjust_dynamic_symbol (struct bfd_link_info * info,
2339 struct elf_link_hash_entry * h)
2344 dynobj = elf_hash_table (info)->dynobj;
2346 /* Make sure we know what is going on here. */
2347 BFD_ASSERT (dynobj != NULL
2349 || h->u.weakdef != NULL
2352 && !h->def_regular)));
2354 /* If this is a function, put it in the procedure linkage table. We
2355 will fill in the contents of the procedure linkage table later,
2356 when we know the address of the .got section. */
2357 if (h->type == STT_FUNC
2360 if (! info->executable
2364 /* This case can occur if we saw a PLT reloc in an input
2365 file, but the symbol was never referred to by a dynamic
2366 object. In such a case, we don't actually need to build
2367 a procedure linkage table, and we can just do a REL32
2369 BFD_ASSERT (h->needs_plt);
2373 /* Make sure this symbol is output as a dynamic symbol. */
2374 if (h->dynindx == -1)
2376 if (! bfd_elf_link_record_dynamic_symbol (info, h))
2380 /* We also need to make an entry in the .got.plt section, which
2381 will be placed in the .got section by the linker script. */
2383 s = bfd_get_section_by_name (dynobj, ".got.plt");
2384 BFD_ASSERT (s != NULL);
2387 /* We also need to make an entry in the .rela.plt section. */
2389 s = bfd_get_section_by_name (dynobj, ".rela.plt");
2390 BFD_ASSERT (s != NULL);
2391 s->size += sizeof (Elf32_External_Rela);
2396 /* If this is a weak symbol, and there is a real definition, the
2397 processor independent code will have arranged for us to see the
2398 real definition first, and we can just use the same value. */
2399 if (h->u.weakdef != NULL)
2401 BFD_ASSERT (h->u.weakdef->root.type == bfd_link_hash_defined
2402 || h->u.weakdef->root.type == bfd_link_hash_defweak);
2403 h->root.u.def.section = h->u.weakdef->root.u.def.section;
2404 h->root.u.def.value = h->u.weakdef->root.u.def.value;
2408 /* This is a reference to a symbol defined by a dynamic object which
2409 is not a function. */
2411 /* If we are creating a shared library, we must presume that the
2412 only references to the symbol are via the global offset table.
2413 For such cases we need not do anything here; the relocations will
2414 be handled correctly by relocate_section. */
2415 if (info->executable)
2418 /* If there are no references to this symbol that do not use the
2419 GOT, we don't need to generate a copy reloc. */
2420 if (!h->non_got_ref)
2423 /* We must allocate the symbol in our .dynbss section, which will
2424 become part of the .bss section of the executable. There will be
2425 an entry for this symbol in the .dynsym section. The dynamic
2426 object will contain position independent code, so all references
2427 from the dynamic object to this symbol will go through the global
2428 offset table. The dynamic linker will use the .dynsym entry to
2429 determine the address it must put in the global offset table, so
2430 both the dynamic object and the regular object will refer to the
2431 same memory location for the variable. */
2433 s = bfd_get_section_by_name (dynobj, ".dynbss");
2434 BFD_ASSERT (s != NULL);
2436 /* We must generate a R_CR16_COPY reloc to tell the dynamic linker to
2437 copy the initial value out of the dynamic object and into the
2438 runtime process image. We need to remember the offset into the
2439 .rela.bss section we are going to use. */
2440 if ((h->root.u.def.section->flags & SEC_ALLOC) != 0 && h->size != 0)
2444 srel = bfd_get_section_by_name (dynobj, ".rela.bss");
2445 BFD_ASSERT (srel != NULL);
2446 srel->size += sizeof (Elf32_External_Rela);
2450 return _bfd_elf_adjust_dynamic_copy (h, s);
2453 /* Set the sizes of the dynamic sections. */
2456 _bfd_cr16_elf_size_dynamic_sections (bfd * output_bfd,
2457 struct bfd_link_info * info)
2463 bfd_boolean reltext;
2465 dynobj = elf_hash_table (info)->dynobj;
2466 BFD_ASSERT (dynobj != NULL);
2468 if (elf_hash_table (info)->dynamic_sections_created)
2470 /* Set the contents of the .interp section to the interpreter. */
2471 if (info->executable)
2474 s = bfd_get_section_by_name (dynobj, ".interp");
2475 BFD_ASSERT (s != NULL);
2476 s->size = sizeof ELF_DYNAMIC_INTERPRETER;
2477 s->contents = (unsigned char *) ELF_DYNAMIC_INTERPRETER;
2483 /* We may have created entries in the .rela.got section.
2484 However, if we are not creating the dynamic sections, we will
2485 not actually use these entries. Reset the size of .rela.got,
2486 which will cause it to get stripped from the output file
2488 s = bfd_get_section_by_name (dynobj, ".rela.got");
2493 /* The check_relocs and adjust_dynamic_symbol entry points have
2494 determined the sizes of the various dynamic sections. Allocate
2499 for (s = dynobj->sections; s != NULL; s = s->next)
2503 if ((s->flags & SEC_LINKER_CREATED) == 0)
2506 /* It's OK to base decisions on the section name, because none
2507 of the dynobj section names depend upon the input files. */
2508 name = bfd_get_section_name (dynobj, s);
2510 if (strcmp (name, ".plt") == 0)
2512 /* Remember whether there is a PLT. */
2515 else if (CONST_STRNEQ (name, ".rela"))
2521 /* Remember whether there are any reloc sections other
2523 if (strcmp (name, ".rela.plt") != 0)
2525 const char * outname;
2529 /* If this relocation section applies to a read only
2530 section, then we probably need a DT_TEXTREL
2531 entry. The entries in the .rela.plt section
2532 really apply to the .got section, which we
2533 created ourselves and so know is not readonly. */
2534 outname = bfd_get_section_name (output_bfd,
2536 target = bfd_get_section_by_name (output_bfd, outname + 5);
2538 && (target->flags & SEC_READONLY) != 0
2539 && (target->flags & SEC_ALLOC) != 0)
2543 /* We use the reloc_count field as a counter if we need
2544 to copy relocs into the output file. */
2548 else if (! CONST_STRNEQ (name, ".got")
2549 && strcmp (name, ".dynbss") != 0)
2550 /* It's not one of our sections, so don't allocate space. */
2555 /* If we don't need this section, strip it from the
2556 output file. This is mostly to handle .rela.bss and
2557 .rela.plt. We must create both sections in
2558 create_dynamic_sections, because they must be created
2559 before the linker maps input sections to output
2560 sections. The linker does that before
2561 adjust_dynamic_symbol is called, and it is that
2562 function which decides whether anything needs to go
2563 into these sections. */
2564 s->flags |= SEC_EXCLUDE;
2568 if ((s->flags & SEC_HAS_CONTENTS) == 0)
2571 /* Allocate memory for the section contents. We use bfd_zalloc
2572 here in case unused entries are not reclaimed before the
2573 section's contents are written out. This should not happen,
2574 but this way if it does, we get a R_CR16_NONE reloc
2575 instead of garbage. */
2576 s->contents = (bfd_byte *) bfd_zalloc (dynobj, s->size);
2577 if (s->contents == NULL)
2581 if (elf_hash_table (info)->dynamic_sections_created)
2583 /* Add some entries to the .dynamic section. We fill in the
2584 values later, in _bfd_cr16_elf_finish_dynamic_sections,
2585 but we must add the entries now so that we get the correct
2586 size for the .dynamic section. The DT_DEBUG entry is filled
2587 in by the dynamic linker and used by the debugger. */
2588 if (! info->executable)
2590 if (!_bfd_elf_add_dynamic_entry (info, DT_DEBUG, 0))
2596 if (!_bfd_elf_add_dynamic_entry (info, DT_PLTGOT, 0)
2597 || !_bfd_elf_add_dynamic_entry (info, DT_PLTRELSZ, 0)
2598 || !_bfd_elf_add_dynamic_entry (info, DT_PLTREL, DT_RELA)
2599 || !_bfd_elf_add_dynamic_entry (info, DT_JMPREL, 0))
2605 if (!_bfd_elf_add_dynamic_entry (info, DT_RELA, 0)
2606 || !_bfd_elf_add_dynamic_entry (info, DT_RELASZ, 0)
2607 || !_bfd_elf_add_dynamic_entry (info, DT_RELAENT,
2608 sizeof (Elf32_External_Rela)))
2614 if (!_bfd_elf_add_dynamic_entry (info, DT_TEXTREL, 0))
2622 /* Finish up dynamic symbol handling. We set the contents of various
2623 dynamic sections here. */
2626 _bfd_cr16_elf_finish_dynamic_symbol (bfd * output_bfd,
2627 struct bfd_link_info * info,
2628 struct elf_link_hash_entry * h,
2629 Elf_Internal_Sym * sym)
2633 dynobj = elf_hash_table (info)->dynobj;
2635 if (h->got.offset != (bfd_vma) -1)
2639 Elf_Internal_Rela rel;
2641 /* This symbol has an entry in the global offset table. Set it up. */
2643 sgot = bfd_get_section_by_name (dynobj, ".got");
2644 srel = bfd_get_section_by_name (dynobj, ".rela.got");
2645 BFD_ASSERT (sgot != NULL && srel != NULL);
2647 rel.r_offset = (sgot->output_section->vma
2648 + sgot->output_offset
2649 + (h->got.offset & ~1));
2651 /* If this is a -Bsymbolic link, and the symbol is defined
2652 locally, we just want to emit a RELATIVE reloc. Likewise if
2653 the symbol was forced to be local because of a version file.
2654 The entry in the global offset table will already have been
2655 initialized in the relocate_section function. */
2656 if (info->executable
2657 && (info->symbolic || h->dynindx == -1)
2660 rel.r_info = ELF32_R_INFO (0, R_CR16_GOT_REGREL20);
2661 rel.r_addend = (h->root.u.def.value
2662 + h->root.u.def.section->output_section->vma
2663 + h->root.u.def.section->output_offset);
2667 bfd_put_32 (output_bfd, (bfd_vma) 0, sgot->contents + h->got.offset);
2668 rel.r_info = ELF32_R_INFO (h->dynindx, R_CR16_GOT_REGREL20);
2672 bfd_elf32_swap_reloca_out (output_bfd, &rel,
2673 (bfd_byte *) ((Elf32_External_Rela *) srel->contents
2674 + srel->reloc_count));
2675 ++ srel->reloc_count;
2681 Elf_Internal_Rela rel;
2683 /* This symbol needs a copy reloc. Set it up. */
2684 BFD_ASSERT (h->dynindx != -1
2685 && (h->root.type == bfd_link_hash_defined
2686 || h->root.type == bfd_link_hash_defweak));
2688 s = bfd_get_section_by_name (h->root.u.def.section->owner,
2690 BFD_ASSERT (s != NULL);
2692 rel.r_offset = (h->root.u.def.value
2693 + h->root.u.def.section->output_section->vma
2694 + h->root.u.def.section->output_offset);
2695 rel.r_info = ELF32_R_INFO (h->dynindx, R_CR16_GOT_REGREL20);
2697 bfd_elf32_swap_reloca_out (output_bfd, &rel,
2698 (bfd_byte *) ((Elf32_External_Rela *) s->contents
2703 /* Mark _DYNAMIC and _GLOBAL_OFFSET_TABLE_ as absolute. */
2704 if (strcmp (h->root.root.string, "_DYNAMIC") == 0
2705 || h == elf_hash_table (info)->hgot)
2706 sym->st_shndx = SHN_ABS;
2711 /* Finish up the dynamic sections. */
2714 _bfd_cr16_elf_finish_dynamic_sections (bfd * output_bfd,
2715 struct bfd_link_info * info)
2721 dynobj = elf_hash_table (info)->dynobj;
2723 sgot = bfd_get_section_by_name (dynobj, ".got.plt");
2724 BFD_ASSERT (sgot != NULL);
2725 sdyn = bfd_get_section_by_name (dynobj, ".dynamic");
2727 if (elf_hash_table (info)->dynamic_sections_created)
2729 Elf32_External_Dyn * dyncon;
2730 Elf32_External_Dyn * dynconend;
2732 BFD_ASSERT (sdyn != NULL);
2734 dyncon = (Elf32_External_Dyn *) sdyn->contents;
2735 dynconend = (Elf32_External_Dyn *) (sdyn->contents + sdyn->size);
2737 for (; dyncon < dynconend; dyncon++)
2739 Elf_Internal_Dyn dyn;
2743 bfd_elf32_swap_dyn_in (dynobj, dyncon, &dyn);
2757 s = bfd_get_section_by_name (output_bfd, name);
2758 BFD_ASSERT (s != NULL);
2759 dyn.d_un.d_ptr = s->vma;
2760 bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon);
2764 s = bfd_get_section_by_name (output_bfd, ".rela.plt");
2765 BFD_ASSERT (s != NULL);
2766 dyn.d_un.d_val = s->size;
2767 bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon);
2771 /* My reading of the SVR4 ABI indicates that the
2772 procedure linkage table relocs (DT_JMPREL) should be
2773 included in the overall relocs (DT_RELA). This is
2774 what Solaris does. However, UnixWare can not handle
2775 that case. Therefore, we override the DT_RELASZ entry
2776 here to make it not include the JMPREL relocs. Since
2777 the linker script arranges for .rela.plt to follow all
2778 other relocation sections, we don't have to worry
2779 about changing the DT_RELA entry. */
2780 s = bfd_get_section_by_name (output_bfd, ".rela.plt");
2782 dyn.d_un.d_val -= s->size;
2783 bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon);
2790 /* Fill in the first three entries in the global offset table. */
2794 bfd_put_32 (output_bfd, (bfd_vma) 0, sgot->contents);
2796 bfd_put_32 (output_bfd,
2797 sdyn->output_section->vma + sdyn->output_offset,
2801 elf_section_data (sgot->output_section)->this_hdr.sh_entsize = 4;
2806 /* Given a .data.rel section and a .emreloc in-memory section, store
2807 relocation information into the .emreloc section which can be
2808 used at runtime to relocate the section. This is called by the
2809 linker when the --embedded-relocs switch is used. This is called
2810 after the add_symbols entry point has been called for all the
2811 objects, and before the final_link entry point is called. */
2814 bfd_cr16_elf32_create_embedded_relocs (bfd *abfd,
2815 struct bfd_link_info *info,
2820 Elf_Internal_Shdr *symtab_hdr;
2821 Elf_Internal_Sym *isymbuf = NULL;
2822 Elf_Internal_Rela *internal_relocs = NULL;
2823 Elf_Internal_Rela *irel, *irelend;
2827 BFD_ASSERT (! info->relocatable);
2831 if (datasec->reloc_count == 0)
2834 symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
2836 /* Get a copy of the native relocations. */
2837 internal_relocs = (_bfd_elf_link_read_relocs
2838 (abfd, datasec, NULL, NULL, info->keep_memory));
2839 if (internal_relocs == NULL)
2842 amt = (bfd_size_type) datasec->reloc_count * 8;
2843 relsec->contents = (bfd_byte *) bfd_alloc (abfd, amt);
2844 if (relsec->contents == NULL)
2847 p = relsec->contents;
2849 irelend = internal_relocs + datasec->reloc_count;
2850 for (irel = internal_relocs; irel < irelend; irel++, p += 8)
2852 asection *targetsec;
2854 /* We are going to write a four byte longword into the runtime
2855 reloc section. The longword will be the address in the data
2856 section which must be relocated. It is followed by the name
2857 of the target section NUL-padded or truncated to 8
2860 /* We can only relocate absolute longword relocs at run time. */
2861 if (!((ELF32_R_TYPE (irel->r_info) == (int) R_CR16_NUM32a)
2862 || (ELF32_R_TYPE (irel->r_info) == (int) R_CR16_NUM32)))
2864 *errmsg = _("unsupported reloc type");
2865 bfd_set_error (bfd_error_bad_value);
2869 /* Get the target section referred to by the reloc. */
2870 if (ELF32_R_SYM (irel->r_info) < symtab_hdr->sh_info)
2872 /* A local symbol. */
2873 Elf_Internal_Sym *isym;
2875 /* Read this BFD's local symbols if we haven't done so already. */
2876 if (isymbuf == NULL)
2878 isymbuf = (Elf_Internal_Sym *) symtab_hdr->contents;
2879 if (isymbuf == NULL)
2880 isymbuf = bfd_elf_get_elf_syms (abfd, symtab_hdr,
2881 symtab_hdr->sh_info, 0,
2883 if (isymbuf == NULL)
2887 isym = isymbuf + ELF32_R_SYM (irel->r_info);
2888 targetsec = bfd_section_from_elf_index (abfd, isym->st_shndx);
2893 struct elf_link_hash_entry *h;
2895 /* An external symbol. */
2896 indx = ELF32_R_SYM (irel->r_info) - symtab_hdr->sh_info;
2897 h = elf_sym_hashes (abfd)[indx];
2898 BFD_ASSERT (h != NULL);
2899 if (h->root.type == bfd_link_hash_defined
2900 || h->root.type == bfd_link_hash_defweak)
2901 targetsec = h->root.u.def.section;
2906 bfd_put_32 (abfd, irel->r_offset + datasec->output_offset, p);
2907 memset (p + 4, 0, 4);
2908 if ((ELF32_R_TYPE (irel->r_info) == (int) R_CR16_NUM32a)
2909 && (targetsec != NULL) )
2910 strncpy ((char *) p + 4, targetsec->output_section->name, 4);
2913 if (isymbuf != NULL && symtab_hdr->contents != (unsigned char *) isymbuf)
2915 if (internal_relocs != NULL
2916 && elf_section_data (datasec)->relocs != internal_relocs)
2917 free (internal_relocs);
2921 if (isymbuf != NULL && symtab_hdr->contents != (unsigned char *) isymbuf)
2923 if (internal_relocs != NULL
2924 && elf_section_data (datasec)->relocs != internal_relocs)
2925 free (internal_relocs);
2930 /* Classify relocation types, such that combreloc can sort them
2933 static enum elf_reloc_type_class
2934 _bfd_cr16_elf_reloc_type_class (const Elf_Internal_Rela *rela)
2936 switch ((int) ELF32_R_TYPE (rela->r_info))
2938 case R_CR16_GOT_REGREL20:
2939 case R_CR16_GOTC_REGREL20:
2940 return reloc_class_relative;
2942 return reloc_class_normal;
2946 /* Definitions for setting CR16 target vector. */
2947 #define TARGET_LITTLE_SYM bfd_elf32_cr16_vec
2948 #define TARGET_LITTLE_NAME "elf32-cr16"
2949 #define ELF_ARCH bfd_arch_cr16
2950 #define ELF_MACHINE_CODE EM_CR16
2951 #define ELF_MACHINE_ALT1 EM_CR16_OLD
2952 #define ELF_MAXPAGESIZE 0x1
2953 #define elf_symbol_leading_char '_'
2955 #define bfd_elf32_bfd_reloc_type_lookup elf_cr16_reloc_type_lookup
2956 #define bfd_elf32_bfd_reloc_name_lookup elf_cr16_reloc_name_lookup
2957 #define elf_info_to_howto elf_cr16_info_to_howto
2958 #define elf_info_to_howto_rel 0
2959 #define elf_backend_relocate_section elf32_cr16_relocate_section
2960 #define bfd_elf32_bfd_relax_section elf32_cr16_relax_section
2961 #define bfd_elf32_bfd_get_relocated_section_contents \
2962 elf32_cr16_get_relocated_section_contents
2963 #define elf_backend_gc_mark_hook elf32_cr16_gc_mark_hook
2964 #define elf_backend_gc_sweep_hook elf32_cr16_gc_sweep_hook
2965 #define elf_backend_can_gc_sections 1
2966 #define elf_backend_rela_normal 1
2967 #define elf_backend_check_relocs cr16_elf_check_relocs
2968 /* So we can set bits in e_flags. */
2969 #define elf_backend_final_write_processing \
2970 _bfd_cr16_elf_final_write_processing
2971 #define elf_backend_object_p _bfd_cr16_elf_object_p
2973 #define bfd_elf32_bfd_merge_private_bfd_data \
2974 _bfd_cr16_elf_merge_private_bfd_data
2977 #define bfd_elf32_bfd_link_hash_table_create \
2978 elf32_cr16_link_hash_table_create
2979 #define bfd_elf32_bfd_link_hash_table_free \
2980 elf32_cr16_link_hash_table_free
2982 #define elf_backend_create_dynamic_sections \
2983 _bfd_cr16_elf_create_dynamic_sections
2984 #define elf_backend_adjust_dynamic_symbol \
2985 _bfd_cr16_elf_adjust_dynamic_symbol
2986 #define elf_backend_size_dynamic_sections \
2987 _bfd_cr16_elf_size_dynamic_sections
2988 #define elf_backend_omit_section_dynsym \
2989 ((bfd_boolean (*) (bfd *, struct bfd_link_info *, asection *)) bfd_true)
2990 #define elf_backend_finish_dynamic_symbol \
2991 _bfd_cr16_elf_finish_dynamic_symbol
2992 #define elf_backend_finish_dynamic_sections \
2993 _bfd_cr16_elf_finish_dynamic_sections
2995 #define elf_backend_reloc_type_class _bfd_cr16_elf_reloc_type_class
2998 #define elf_backend_want_got_plt 1
2999 #define elf_backend_plt_readonly 1
3000 #define elf_backend_want_plt_sym 0
3001 #define elf_backend_got_header_size 12
3003 #include "elf32-target.h"