1 /* BFD back-end for National Semiconductor's CR16 ELF
2 Copyright (C) 2007-2018 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);
585 struct elf_link_hash_table *htab = elf_hash_table (info);
588 /* This function may be called more than once. */
589 if (htab->sgot != NULL)
592 switch (bed->s->arch_size)
603 bfd_set_error (bfd_error_bad_value);
607 flags = (SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS | SEC_IN_MEMORY
608 | SEC_LINKER_CREATED);
610 s = bfd_make_section_anyway_with_flags (abfd, ".got", flags);
613 || ! bfd_set_section_alignment (abfd, s, ptralign))
616 if (bed->want_got_plt)
618 s = bfd_make_section_anyway_with_flags (abfd, ".got.plt", flags);
621 || ! bfd_set_section_alignment (abfd, s, ptralign))
625 /* Define the symbol _GLOBAL_OFFSET_TABLE_ at the start of the .got
626 (or .got.plt) section. We don't do this in the linker script
627 because we don't want to define the symbol if we are not creating
628 a global offset table. */
629 h = _bfd_elf_define_linkage_sym (abfd, info, s, "_GLOBAL_OFFSET_TABLE_");
634 /* The first bit of the global offset table is the header. */
635 s->size += bed->got_header_size;
641 /* Retrieve a howto ptr using a BFD reloc_code. */
643 static reloc_howto_type *
644 elf_cr16_reloc_type_lookup (bfd *abfd,
645 bfd_reloc_code_real_type code)
649 for (i = 0; i < R_CR16_MAX; i++)
650 if (code == cr16_reloc_map[i].bfd_reloc_enum)
651 return &cr16_elf_howto_table[cr16_reloc_map[i].cr16_reloc_type];
653 _bfd_error_handler (_("%pB: unsupported relocation type %#x"),
658 static reloc_howto_type *
659 elf_cr16_reloc_name_lookup (bfd *abfd ATTRIBUTE_UNUSED,
664 for (i = 0; ARRAY_SIZE (cr16_elf_howto_table); i++)
665 if (cr16_elf_howto_table[i].name != NULL
666 && strcasecmp (cr16_elf_howto_table[i].name, r_name) == 0)
667 return cr16_elf_howto_table + i;
672 /* Retrieve a howto ptr using an internal relocation entry. */
675 elf_cr16_info_to_howto (bfd *abfd, arelent *cache_ptr,
676 Elf_Internal_Rela *dst)
678 unsigned int r_type = ELF32_R_TYPE (dst->r_info);
680 if (r_type >= R_CR16_MAX)
682 /* xgettext:c-format */
683 _bfd_error_handler (_("%pB: unsupported relocation type %#x"),
685 bfd_set_error (bfd_error_bad_value);
686 r_type = R_CR16_NONE;
688 cache_ptr->howto = cr16_elf_howto_table + r_type;
691 /* Look through the relocs for a section during the first phase.
692 Since we don't do .gots or .plts, we just need to consider the
693 virtual table relocs for gc. */
696 cr16_elf_check_relocs (bfd *abfd, struct bfd_link_info *info, asection *sec,
697 const Elf_Internal_Rela *relocs)
699 Elf_Internal_Shdr *symtab_hdr;
700 Elf_Internal_Sym * isymbuf = NULL;
701 struct elf_link_hash_entry **sym_hashes, **sym_hashes_end;
702 const Elf_Internal_Rela *rel;
703 const Elf_Internal_Rela *rel_end;
705 bfd_vma * local_got_offsets;
711 bfd_boolean result = FALSE;
713 if (bfd_link_relocatable (info))
716 symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
717 sym_hashes = elf_sym_hashes (abfd);
718 sym_hashes_end = sym_hashes + symtab_hdr->sh_size/sizeof (Elf32_External_Sym);
719 if (!elf_bad_symtab (abfd))
720 sym_hashes_end -= symtab_hdr->sh_info;
722 dynobj = elf_hash_table (info)->dynobj;
723 local_got_offsets = elf_local_got_offsets (abfd);
724 rel_end = relocs + sec->reloc_count;
725 for (rel = relocs; rel < rel_end; rel++)
727 struct elf_link_hash_entry *h;
728 unsigned long r_symndx;
730 r_symndx = ELF32_R_SYM (rel->r_info);
731 if (r_symndx < symtab_hdr->sh_info)
735 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
736 while (h->root.type == bfd_link_hash_indirect
737 || h->root.type == bfd_link_hash_warning)
738 h = (struct elf_link_hash_entry *) h->root.u.i.link;
741 /* Some relocs require a global offset table. */
744 switch (ELF32_R_TYPE (rel->r_info))
746 case R_CR16_GOT_REGREL20:
747 case R_CR16_GOTC_REGREL20:
748 elf_hash_table (info)->dynobj = dynobj = abfd;
749 if (! _bfd_cr16_elf_create_got_section (dynobj, info))
758 switch (ELF32_R_TYPE (rel->r_info))
760 case R_CR16_GOT_REGREL20:
761 case R_CR16_GOTC_REGREL20:
762 /* This symbol requires a global offset table entry. */
764 sgot = elf_hash_table (info)->sgot;
765 srelgot = elf_hash_table (info)->srelgot;
766 BFD_ASSERT (sgot != NULL && srelgot != NULL);
770 if (h->got.offset != (bfd_vma) -1)
771 /* We have already allocated space in the .got. */
774 h->got.offset = sgot->size;
776 /* Make sure this symbol is output as a dynamic symbol. */
777 if (h->dynindx == -1)
779 if (! bfd_elf_link_record_dynamic_symbol (info, h))
783 srelgot->size += sizeof (Elf32_External_Rela);
787 /* This is a global offset table entry for a local
789 if (local_got_offsets == NULL)
794 size = symtab_hdr->sh_info * sizeof (bfd_vma);
795 local_got_offsets = (bfd_vma *) bfd_alloc (abfd, size);
797 if (local_got_offsets == NULL)
800 elf_local_got_offsets (abfd) = local_got_offsets;
802 for (i = 0; i < symtab_hdr->sh_info; i++)
803 local_got_offsets[i] = (bfd_vma) -1;
806 if (local_got_offsets[r_symndx] != (bfd_vma) -1)
807 /* We have already allocated space in the .got. */
810 local_got_offsets[r_symndx] = sgot->size;
812 if (bfd_link_executable (info))
813 /* If we are generating a shared object, we need to
814 output a R_CR16_RELATIVE reloc so that the dynamic
815 linker can adjust this GOT entry. */
816 srelgot->size += sizeof (Elf32_External_Rela);
833 /* Perform a relocation as part of a final link. */
835 static bfd_reloc_status_type
836 cr16_elf_final_link_relocate (reloc_howto_type *howto,
838 bfd *output_bfd ATTRIBUTE_UNUSED,
839 asection *input_section,
844 struct elf_link_hash_entry * h,
845 unsigned long symndx ATTRIBUTE_UNUSED,
846 struct bfd_link_info *info ATTRIBUTE_UNUSED,
847 asection *sec ATTRIBUTE_UNUSED,
848 int is_local ATTRIBUTE_UNUSED)
850 unsigned short r_type = howto->type;
851 bfd_byte *hit_data = contents + offset;
852 bfd_vma reloc_bits, check, Rvalue1;
866 case R_CR16_REGREL4a:
867 case R_CR16_REGREL14:
868 case R_CR16_REGREL14a:
869 case R_CR16_REGREL16:
870 case R_CR16_REGREL20:
871 case R_CR16_REGREL20a:
872 case R_CR16_GOT_REGREL20:
873 case R_CR16_GOTC_REGREL20:
877 /* 'hit_data' is relative to the start of the instruction, not the
878 relocation offset. Advance it to account for the exact offset. */
898 case R_CR16_SWITCH16:
899 case R_CR16_SWITCH32:
900 /* We only care about the addend, where the difference between
901 expressions is kept. */
908 if (howto->pc_relative)
910 /* Subtract the address of the section containing the location. */
911 Rvalue -= (input_section->output_section->vma
912 + input_section->output_offset);
913 /* Subtract the position of the location within the section. */
917 /* Add in supplied addend. */
920 /* Complain if the bitfield overflows, whether it is considered
921 as signed or unsigned. */
922 check = Rvalue >> howto->rightshift;
924 /* Assumes two's complement. This expression avoids
925 overflow if howto->bitsize is the number of bits in
927 reloc_bits = (((1 << (howto->bitsize - 1)) - 1) << 1) | 1;
929 /* For GOT and GOTC relocs no boundary checks applied. */
930 if (!((r_type == R_CR16_GOT_REGREL20)
931 || (r_type == R_CR16_GOTC_REGREL20)))
933 if (((bfd_vma) check & ~reloc_bits) != 0
934 && (((bfd_vma) check & ~reloc_bits)
935 != (-(bfd_vma) 1 & ~reloc_bits)))
937 /* The above right shift is incorrect for a signed
938 value. See if turning on the upper bits fixes the
940 if (howto->rightshift && (bfd_signed_vma) Rvalue < 0)
942 check |= ((bfd_vma) - 1
944 >> howto->rightshift));
946 if (((bfd_vma) check & ~reloc_bits)
947 != (-(bfd_vma) 1 & ~reloc_bits))
948 return bfd_reloc_overflow;
951 return bfd_reloc_overflow;
954 /* Drop unwanted bits from the value we are relocating to. */
955 Rvalue >>= (bfd_vma) howto->rightshift;
957 /* Apply dst_mask to select only relocatable part of the insn. */
958 Rvalue &= howto->dst_mask;
964 if (r_type == R_CR16_DISP8)
966 Rvalue1 = bfd_get_16 (input_bfd, hit_data);
967 Rvalue = ((Rvalue1 & 0xf000) | ((Rvalue << 4) & 0xf00)
968 | (Rvalue1 & 0x00f0) | (Rvalue & 0xf));
969 bfd_put_16 (input_bfd, Rvalue, hit_data);
971 else if (r_type == R_CR16_IMM4)
973 Rvalue1 = bfd_get_16 (input_bfd, hit_data);
974 Rvalue = (((Rvalue1 & 0xff) << 8) | ((Rvalue << 4) & 0xf0)
975 | ((Rvalue1 & 0x0f00) >> 8));
976 bfd_put_16 (input_bfd, Rvalue, hit_data);
978 else if (r_type == R_CR16_DISP4)
980 Rvalue1 = bfd_get_16 (input_bfd, hit_data);
981 Rvalue = (Rvalue1 | ((Rvalue & 0xf) << 4));
982 bfd_put_16 (input_bfd, Rvalue, hit_data);
986 bfd_put_8 (input_bfd, (unsigned char) Rvalue, hit_data);
991 if (r_type == R_CR16_DISP16)
993 Rvalue |= (bfd_get_16 (input_bfd, hit_data));
994 Rvalue = ((Rvalue & 0xfffe) | ((Rvalue >> 16) & 0x1));
996 if (r_type == R_CR16_IMM16)
998 Rvalue1 = bfd_get_16 (input_bfd, hit_data);
1000 /* Add or subtract the offset value. */
1001 if (Rvalue1 & 0x8000)
1002 Rvalue -= (~Rvalue1 + 1) & 0xffff;
1006 /* Check for range. */
1007 if ((long) Rvalue > 0xffff || (long) Rvalue < 0x0)
1008 return bfd_reloc_overflow;
1011 bfd_put_16 (input_bfd, Rvalue, hit_data);
1015 if ((r_type == R_CR16_ABS20) || (r_type == R_CR16_IMM20))
1017 Rvalue1 = (bfd_get_16 (input_bfd, hit_data + 2)
1018 | (((bfd_get_16 (input_bfd, hit_data) & 0xf) <<16)));
1020 /* Add or subtract the offset value. */
1021 if (Rvalue1 & 0x80000)
1022 Rvalue -= (~Rvalue1 + 1) & 0xfffff;
1026 /* Check for range. */
1027 if ((long) Rvalue > 0xfffff || (long) Rvalue < 0x0)
1028 return bfd_reloc_overflow;
1030 bfd_put_16 (input_bfd, ((bfd_get_16 (input_bfd, hit_data) & 0xfff0)
1031 | ((Rvalue >> 16) & 0xf)), hit_data);
1032 bfd_put_16 (input_bfd, (Rvalue) & 0xffff, hit_data + 2);
1034 else if (r_type == R_CR16_GOT_REGREL20)
1036 asection *sgot = elf_hash_table (info)->sgot;
1042 off = h->got.offset;
1043 BFD_ASSERT (off != (bfd_vma) -1);
1045 if (! elf_hash_table (info)->dynamic_sections_created
1046 || SYMBOL_REFERENCES_LOCAL (info, h))
1047 /* This is actually a static link, or it is a
1048 -Bsymbolic link and the symbol is defined
1049 locally, or the symbol was forced to be local
1050 because of a version file. We must initialize
1051 this entry in the global offset table.
1052 When doing a dynamic link, we create a .rela.got
1053 relocation entry to initialize the value. This
1054 is done in the finish_dynamic_symbol routine. */
1055 bfd_put_32 (output_bfd, Rvalue, sgot->contents + off);
1057 Rvalue = sgot->output_offset + off;
1063 off = elf_local_got_offsets (input_bfd)[symndx];
1064 bfd_put_32 (output_bfd,Rvalue, sgot->contents + off);
1066 Rvalue = sgot->output_offset + off;
1071 /* REVISIT: if ((long) Rvalue > 0xffffff ||
1072 (long) Rvalue < -0x800000). */
1073 if ((long) Rvalue > 0xffffff || (long) Rvalue < 0)
1074 return bfd_reloc_overflow;
1077 bfd_put_16 (input_bfd, (bfd_get_16 (input_bfd, hit_data))
1078 | (((Rvalue >> 16) & 0xf) << 8), hit_data);
1079 bfd_put_16 (input_bfd, (Rvalue) & 0xffff, hit_data + 2);
1082 else if (r_type == R_CR16_GOTC_REGREL20)
1084 asection *sgot = elf_hash_table (info)->sgot;
1090 off = h->got.offset;
1091 BFD_ASSERT (off != (bfd_vma) -1);
1093 Rvalue >>=1; /* For code symbols. */
1095 if (! elf_hash_table (info)->dynamic_sections_created
1096 || SYMBOL_REFERENCES_LOCAL (info, h))
1097 /* This is actually a static link, or it is a
1098 -Bsymbolic link and the symbol is defined
1099 locally, or the symbol was forced to be local
1100 because of a version file. We must initialize
1101 this entry in the global offset table.
1102 When doing a dynamic link, we create a .rela.got
1103 relocation entry to initialize the value. This
1104 is done in the finish_dynamic_symbol routine. */
1105 bfd_put_32 (output_bfd, Rvalue, sgot->contents + off);
1107 Rvalue = sgot->output_offset + off;
1113 off = elf_local_got_offsets (input_bfd)[symndx];
1115 bfd_put_32 (output_bfd,Rvalue, sgot->contents + off);
1116 Rvalue = sgot->output_offset + off;
1121 /* Check if any value in DISP. */
1122 Rvalue1 =((bfd_get_32 (input_bfd, hit_data) >>16)
1123 | (((bfd_get_32 (input_bfd, hit_data) & 0xfff) >> 8) <<16));
1125 /* Add or subtract the offset value. */
1126 if (Rvalue1 & 0x80000)
1127 Rvalue -= (~Rvalue1 + 1) & 0xfffff;
1131 /* Check for range. */
1132 /* REVISIT: if ((long) Rvalue > 0xffffff
1133 || (long) Rvalue < -0x800000). */
1134 if ((long) Rvalue > 0xffffff || (long) Rvalue < 0)
1135 return bfd_reloc_overflow;
1137 bfd_put_16 (input_bfd, (bfd_get_16 (input_bfd, hit_data))
1138 | (((Rvalue >> 16) & 0xf) << 8), hit_data);
1139 bfd_put_16 (input_bfd, (Rvalue) & 0xffff, hit_data + 2);
1143 if (r_type == R_CR16_ABS24)
1145 Rvalue1 = ((bfd_get_32 (input_bfd, hit_data) >> 16)
1146 | (((bfd_get_32 (input_bfd, hit_data) & 0xfff) >> 8) <<16)
1147 | (((bfd_get_32 (input_bfd, hit_data) & 0xf) <<20)));
1149 /* Add or subtract the offset value. */
1150 if (Rvalue1 & 0x800000)
1151 Rvalue -= (~Rvalue1 + 1) & 0xffffff;
1155 /* Check for Range. */
1156 if ((long) Rvalue > 0xffffff || (long) Rvalue < 0x0)
1157 return bfd_reloc_overflow;
1159 Rvalue = ((((Rvalue >> 20) & 0xf) | (((Rvalue >> 16) & 0xf)<<8)
1160 | (bfd_get_32 (input_bfd, hit_data) & 0xf0f0))
1161 | ((Rvalue & 0xffff) << 16));
1163 else if (r_type == R_CR16_DISP24)
1165 Rvalue = ((((Rvalue >> 20)& 0xf) | (((Rvalue >>16) & 0xf)<<8)
1166 | (bfd_get_16 (input_bfd, hit_data)))
1167 | (((Rvalue & 0xfffe) | ((Rvalue >> 24) & 0x1)) << 16));
1169 else if ((r_type == R_CR16_IMM32) || (r_type == R_CR16_IMM32a))
1171 Rvalue1 =((((bfd_get_32 (input_bfd, hit_data)) >> 16) &0xffff)
1172 | (((bfd_get_32 (input_bfd, hit_data)) &0xffff)) << 16);
1174 /* Add or subtract the offset value. */
1175 if (Rvalue1 & 0x80000000)
1176 Rvalue -= (~Rvalue1 + 1) & 0xffffffff;
1180 /* Check for range. */
1181 if (Rvalue > 0xffffffff || (long) Rvalue < 0x0)
1182 return bfd_reloc_overflow;
1184 Rvalue = (((Rvalue >> 16)& 0xffff) | (Rvalue & 0xffff) << 16);
1186 else if (r_type == R_CR16_DISP24a)
1188 Rvalue = (((Rvalue & 0xfffffe) | (Rvalue >> 23)));
1189 Rvalue = ((Rvalue >> 16) & 0xff) | ((Rvalue & 0xffff) << 16)
1190 | (bfd_get_32 (input_bfd, hit_data));
1192 else if ((r_type == R_CR16_REGREL20)
1193 || (r_type == R_CR16_REGREL20a))
1195 Rvalue1 = ((bfd_get_32 (input_bfd, hit_data) >> 16)
1196 | (((bfd_get_32 (input_bfd, hit_data) & 0xfff) >> 8) <<16));
1197 /* Add or subtract the offset value. */
1198 if (Rvalue1 & 0x80000)
1199 Rvalue -= (~Rvalue1 + 1) & 0xfffff;
1203 /* Check for range. */
1204 if ((long) Rvalue > 0xfffff || (long) Rvalue < 0x0)
1205 return bfd_reloc_overflow;
1207 Rvalue = (((((Rvalue >> 20)& 0xf) | (((Rvalue >>16) & 0xf)<<8)
1208 | ((Rvalue & 0xffff) << 16)))
1209 | (bfd_get_32 (input_bfd, hit_data) & 0xf0ff));
1212 else if (r_type == R_CR16_NUM32)
1214 Rvalue1 = (bfd_get_32 (input_bfd, hit_data));
1216 /* Add or subtract the offset value */
1217 if (Rvalue1 & 0x80000000)
1218 Rvalue -= (~Rvalue1 + 1) & 0xffffffff;
1222 /* Check for Ranga */
1223 if (Rvalue > 0xffffffff)
1224 return bfd_reloc_overflow;
1227 bfd_put_32 (input_bfd, Rvalue, hit_data);
1232 return bfd_reloc_notsupported;
1235 return bfd_reloc_ok;
1238 /* Delete some bytes from a section while relaxing. */
1241 elf32_cr16_relax_delete_bytes (struct bfd_link_info *link_info, bfd *abfd,
1242 asection *sec, bfd_vma addr, int count)
1244 Elf_Internal_Shdr *symtab_hdr;
1245 unsigned int sec_shndx;
1247 Elf_Internal_Rela *irel, *irelend;
1249 Elf_Internal_Sym *isym;
1250 Elf_Internal_Sym *isymend;
1251 struct elf_link_hash_entry **sym_hashes;
1252 struct elf_link_hash_entry **end_hashes;
1253 struct elf_link_hash_entry **start_hashes;
1254 unsigned int symcount;
1256 sec_shndx = _bfd_elf_section_from_bfd_section (abfd, sec);
1258 contents = elf_section_data (sec)->this_hdr.contents;
1262 irel = elf_section_data (sec)->relocs;
1263 irelend = irel + sec->reloc_count;
1265 /* Actually delete the bytes. */
1266 memmove (contents + addr, contents + addr + count,
1267 (size_t) (toaddr - addr - count));
1270 /* Adjust all the relocs. */
1271 for (irel = elf_section_data (sec)->relocs; irel < irelend; irel++)
1272 /* Get the new reloc address. */
1273 if ((irel->r_offset > addr && irel->r_offset < toaddr))
1274 irel->r_offset -= count;
1276 /* Adjust the local symbols defined in this section. */
1277 symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
1278 isym = (Elf_Internal_Sym *) symtab_hdr->contents;
1279 for (isymend = isym + symtab_hdr->sh_info; isym < isymend; isym++)
1281 if (isym->st_shndx == sec_shndx
1282 && isym->st_value > addr
1283 && isym->st_value < toaddr)
1285 /* Adjust the addend of SWITCH relocations in this section,
1286 which reference this local symbol. */
1288 for (irel = elf_section_data (sec)->relocs; irel < irelend; irel++)
1290 unsigned long r_symndx;
1291 Elf_Internal_Sym *rsym;
1292 bfd_vma addsym, subsym;
1294 /* Skip if not a SWITCH relocation. */
1295 if (ELF32_R_TYPE (irel->r_info) != (int) R_CR16_SWITCH8
1296 && ELF32_R_TYPE (irel->r_info) != (int) R_CR16_SWITCH16
1297 && ELF32_R_TYPE (irel->r_info) != (int) R_CR16_SWITCH32)
1300 r_symndx = ELF32_R_SYM (irel->r_info);
1301 rsym = (Elf_Internal_Sym *) symtab_hdr->contents + r_symndx;
1303 /* Skip if not the local adjusted symbol. */
1307 addsym = isym->st_value;
1308 subsym = addsym - irel->r_addend;
1310 /* Fix the addend only when -->> (addsym > addr >= subsym). */
1312 irel->r_addend -= count;
1318 isym->st_value -= count;
1322 /* Now adjust the global symbols defined in this section. */
1323 symcount = (symtab_hdr->sh_size / sizeof (Elf32_External_Sym)
1324 - symtab_hdr->sh_info);
1325 sym_hashes = start_hashes = elf_sym_hashes (abfd);
1326 end_hashes = sym_hashes + symcount;
1328 for (; sym_hashes < end_hashes; sym_hashes++)
1330 struct elf_link_hash_entry *sym_hash = *sym_hashes;
1332 /* The '--wrap SYMBOL' option is causing a pain when the object file,
1333 containing the definition of __wrap_SYMBOL, includes a direct
1334 call to SYMBOL as well. Since both __wrap_SYMBOL and SYMBOL reference
1335 the same symbol (which is __wrap_SYMBOL), but still exist as two
1336 different symbols in 'sym_hashes', we don't want to adjust
1337 the global symbol __wrap_SYMBOL twice.
1338 This check is only relevant when symbols are being wrapped. */
1339 if (link_info->wrap_hash != NULL)
1341 struct elf_link_hash_entry **cur_sym_hashes;
1343 /* Loop only over the symbols whom been already checked. */
1344 for (cur_sym_hashes = start_hashes; cur_sym_hashes < sym_hashes;
1346 /* If the current symbol is identical to 'sym_hash', that means
1347 the symbol was already adjusted (or at least checked). */
1348 if (*cur_sym_hashes == sym_hash)
1351 /* Don't adjust the symbol again. */
1352 if (cur_sym_hashes < sym_hashes)
1356 if ((sym_hash->root.type == bfd_link_hash_defined
1357 || sym_hash->root.type == bfd_link_hash_defweak)
1358 && sym_hash->root.u.def.section == sec
1359 && sym_hash->root.u.def.value > addr
1360 && sym_hash->root.u.def.value < toaddr)
1361 sym_hash->root.u.def.value -= count;
1367 /* Relocate a CR16 ELF section. */
1370 elf32_cr16_relocate_section (bfd *output_bfd, struct bfd_link_info *info,
1371 bfd *input_bfd, asection *input_section,
1372 bfd_byte *contents, Elf_Internal_Rela *relocs,
1373 Elf_Internal_Sym *local_syms,
1374 asection **local_sections)
1376 Elf_Internal_Shdr *symtab_hdr;
1377 struct elf_link_hash_entry **sym_hashes;
1378 Elf_Internal_Rela *rel, *relend;
1380 symtab_hdr = &elf_tdata (input_bfd)->symtab_hdr;
1381 sym_hashes = elf_sym_hashes (input_bfd);
1384 relend = relocs + input_section->reloc_count;
1385 for (; rel < relend; rel++)
1388 reloc_howto_type *howto;
1389 unsigned long r_symndx;
1390 Elf_Internal_Sym *sym;
1392 struct elf_link_hash_entry *h;
1394 bfd_reloc_status_type r;
1396 r_symndx = ELF32_R_SYM (rel->r_info);
1397 r_type = ELF32_R_TYPE (rel->r_info);
1398 howto = cr16_elf_howto_table + (r_type);
1403 if (r_symndx < symtab_hdr->sh_info)
1405 sym = local_syms + r_symndx;
1406 sec = local_sections[r_symndx];
1407 relocation = _bfd_elf_rela_local_sym (output_bfd, sym, &sec, rel);
1411 bfd_boolean unresolved_reloc, warned, ignored;
1413 RELOC_FOR_GLOBAL_SYMBOL (info, input_bfd, input_section, rel,
1414 r_symndx, symtab_hdr, sym_hashes,
1416 unresolved_reloc, warned, ignored);
1419 if (sec != NULL && discarded_section (sec))
1420 RELOC_AGAINST_DISCARDED_SECTION (info, input_bfd, input_section,
1421 rel, 1, relend, howto, 0, contents);
1423 if (bfd_link_relocatable (info))
1426 r = cr16_elf_final_link_relocate (howto, input_bfd, output_bfd,
1428 contents, rel->r_offset,
1429 relocation, rel->r_addend,
1430 (struct elf_link_hash_entry *) h,
1432 info, sec, h == NULL);
1434 if (r != bfd_reloc_ok)
1437 const char *msg = NULL;
1440 name = h->root.root.string;
1443 name = (bfd_elf_string_from_elf_section
1444 (input_bfd, symtab_hdr->sh_link, sym->st_name));
1445 if (name == NULL || *name == '\0')
1446 name = bfd_section_name (input_bfd, sec);
1451 case bfd_reloc_overflow:
1452 (*info->callbacks->reloc_overflow)
1453 (info, (h ? &h->root : NULL), name, howto->name,
1454 (bfd_vma) 0, input_bfd, input_section, rel->r_offset);
1457 case bfd_reloc_undefined:
1458 (*info->callbacks->undefined_symbol)
1459 (info, name, input_bfd, input_section, rel->r_offset, TRUE);
1462 case bfd_reloc_outofrange:
1463 msg = _("internal error: out of range error");
1466 case bfd_reloc_notsupported:
1467 msg = _("internal error: unsupported relocation error");
1470 case bfd_reloc_dangerous:
1471 msg = _("internal error: dangerous error");
1475 msg = _("internal error: unknown error");
1479 (*info->callbacks->warning) (info, msg, name, input_bfd,
1480 input_section, rel->r_offset);
1489 /* This is a version of bfd_generic_get_relocated_section_contents
1490 which uses elf32_cr16_relocate_section. */
1493 elf32_cr16_get_relocated_section_contents (bfd *output_bfd,
1494 struct bfd_link_info *link_info,
1495 struct bfd_link_order *link_order,
1497 bfd_boolean relocatable,
1500 Elf_Internal_Shdr *symtab_hdr;
1501 asection *input_section = link_order->u.indirect.section;
1502 bfd *input_bfd = input_section->owner;
1503 asection **sections = NULL;
1504 Elf_Internal_Rela *internal_relocs = NULL;
1505 Elf_Internal_Sym *isymbuf = NULL;
1507 /* We only need to handle the case of relaxing, or of having a
1508 particular set of section contents, specially. */
1510 || elf_section_data (input_section)->this_hdr.contents == NULL)
1511 return bfd_generic_get_relocated_section_contents (output_bfd, link_info,
1516 symtab_hdr = &elf_tdata (input_bfd)->symtab_hdr;
1518 memcpy (data, elf_section_data (input_section)->this_hdr.contents,
1519 (size_t) input_section->size);
1521 if ((input_section->flags & SEC_RELOC) != 0
1522 && input_section->reloc_count > 0)
1524 Elf_Internal_Sym *isym;
1525 Elf_Internal_Sym *isymend;
1529 internal_relocs = _bfd_elf_link_read_relocs (input_bfd, input_section,
1531 if (internal_relocs == NULL)
1534 if (symtab_hdr->sh_info != 0)
1536 isymbuf = (Elf_Internal_Sym *) symtab_hdr->contents;
1537 if (isymbuf == NULL)
1538 isymbuf = bfd_elf_get_elf_syms (input_bfd, symtab_hdr,
1539 symtab_hdr->sh_info, 0,
1541 if (isymbuf == NULL)
1545 amt = symtab_hdr->sh_info;
1546 amt *= sizeof (asection *);
1547 sections = bfd_malloc (amt);
1548 if (sections == NULL && amt != 0)
1551 isymend = isymbuf + symtab_hdr->sh_info;
1552 for (isym = isymbuf, secpp = sections; isym < isymend; ++isym, ++secpp)
1556 if (isym->st_shndx == SHN_UNDEF)
1557 isec = bfd_und_section_ptr;
1558 else if (isym->st_shndx == SHN_ABS)
1559 isec = bfd_abs_section_ptr;
1560 else if (isym->st_shndx == SHN_COMMON)
1561 isec = bfd_com_section_ptr;
1563 isec = bfd_section_from_elf_index (input_bfd, isym->st_shndx);
1568 if (! elf32_cr16_relocate_section (output_bfd, link_info, input_bfd,
1569 input_section, data, internal_relocs,
1573 if (sections != NULL)
1576 && symtab_hdr->contents != (unsigned char *) isymbuf)
1578 if (elf_section_data (input_section)->relocs != internal_relocs)
1579 free (internal_relocs);
1585 if (sections != NULL)
1588 && symtab_hdr->contents != (unsigned char *) isymbuf)
1590 if (internal_relocs != NULL
1591 && elf_section_data (input_section)->relocs != internal_relocs)
1592 free (internal_relocs);
1596 /* Assorted hash table functions. */
1598 /* Initialize an entry in the link hash table. */
1600 /* Create an entry in an CR16 ELF linker hash table. */
1602 static struct bfd_hash_entry *
1603 elf32_cr16_link_hash_newfunc (struct bfd_hash_entry *entry,
1604 struct bfd_hash_table *table,
1607 struct elf32_cr16_link_hash_entry *ret =
1608 (struct elf32_cr16_link_hash_entry *) entry;
1610 /* Allocate the structure if it has not already been allocated by a
1612 if (ret == (struct elf32_cr16_link_hash_entry *) NULL)
1613 ret = ((struct elf32_cr16_link_hash_entry *)
1614 bfd_hash_allocate (table,
1615 sizeof (struct elf32_cr16_link_hash_entry)));
1616 if (ret == (struct elf32_cr16_link_hash_entry *) NULL)
1617 return (struct bfd_hash_entry *) ret;
1619 /* Call the allocation method of the superclass. */
1620 ret = ((struct elf32_cr16_link_hash_entry *)
1621 _bfd_elf_link_hash_newfunc ((struct bfd_hash_entry *) ret,
1623 if (ret != (struct elf32_cr16_link_hash_entry *) NULL)
1625 ret->direct_calls = 0;
1626 ret->stack_size = 0;
1628 ret->movm_stack_size = 0;
1633 return (struct bfd_hash_entry *) ret;
1636 /* Create an cr16 ELF linker hash table. */
1638 static struct bfd_link_hash_table *
1639 elf32_cr16_link_hash_table_create (bfd *abfd)
1641 struct elf_link_hash_table *ret;
1642 bfd_size_type amt = sizeof (struct elf_link_hash_table);
1644 ret = (struct elf_link_hash_table *) bfd_zmalloc (amt);
1645 if (ret == (struct elf_link_hash_table *) NULL)
1648 if (!_bfd_elf_link_hash_table_init (ret, abfd,
1649 elf32_cr16_link_hash_newfunc,
1650 sizeof (struct elf32_cr16_link_hash_entry),
1660 static unsigned long
1661 elf_cr16_mach (flagword flags)
1667 return bfd_mach_cr16;
1671 /* The final processing done just before writing out a CR16 ELF object
1672 file. This gets the CR16 architecture right based on the machine
1676 _bfd_cr16_elf_final_write_processing (bfd *abfd,
1677 bfd_boolean linker ATTRIBUTE_UNUSED)
1680 switch (bfd_get_mach (abfd))
1689 elf_elfheader (abfd)->e_flags |= val;
1694 _bfd_cr16_elf_object_p (bfd *abfd)
1696 bfd_default_set_arch_mach (abfd, bfd_arch_cr16,
1697 elf_cr16_mach (elf_elfheader (abfd)->e_flags));
1701 /* Merge backend specific data from an object file to the output
1702 object file when linking. */
1705 _bfd_cr16_elf_merge_private_bfd_data (bfd *ibfd, struct bfd_link_info *info)
1707 bfd *obfd = info->output_bfd;
1709 if (bfd_get_flavour (ibfd) != bfd_target_elf_flavour
1710 || bfd_get_flavour (obfd) != bfd_target_elf_flavour)
1713 if (bfd_get_arch (obfd) == bfd_get_arch (ibfd)
1714 && bfd_get_mach (obfd) < bfd_get_mach (ibfd))
1716 if (! bfd_set_arch_mach (obfd, bfd_get_arch (ibfd),
1717 bfd_get_mach (ibfd)))
1725 /* This function handles relaxing for the CR16.
1727 There's quite a few relaxing opportunites available on the CR16:
1729 * bcond:24 -> bcond:16 1 byte
1730 * bcond:16 -> bcond:8 1 byte
1731 * arithmetic imm32 -> arithmetic imm20 12 bits
1732 * arithmetic imm20/imm16 -> arithmetic imm4 12/16 bits
1734 Symbol- and reloc-reading infrastructure copied from elf-m10200.c. */
1737 elf32_cr16_relax_section (bfd *abfd, asection *sec,
1738 struct bfd_link_info *link_info, bfd_boolean *again)
1740 Elf_Internal_Shdr *symtab_hdr;
1741 Elf_Internal_Rela *internal_relocs;
1742 Elf_Internal_Rela *irel, *irelend;
1743 bfd_byte *contents = NULL;
1744 Elf_Internal_Sym *isymbuf = NULL;
1746 /* Assume nothing changes. */
1749 /* We don't have to do anything for a relocatable link, if
1750 this section does not have relocs, or if this is not a
1752 if (bfd_link_relocatable (link_info)
1753 || (sec->flags & SEC_RELOC) == 0
1754 || sec->reloc_count == 0
1755 || (sec->flags & SEC_CODE) == 0)
1758 symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
1760 /* Get a copy of the native relocations. */
1761 internal_relocs = _bfd_elf_link_read_relocs (abfd, sec, NULL, NULL,
1762 link_info->keep_memory);
1763 if (internal_relocs == NULL)
1766 /* Walk through them looking for relaxing opportunities. */
1767 irelend = internal_relocs + sec->reloc_count;
1768 for (irel = internal_relocs; irel < irelend; irel++)
1772 /* If this isn't something that can be relaxed, then ignore
1774 if (ELF32_R_TYPE (irel->r_info) != (int) R_CR16_DISP16
1775 && ELF32_R_TYPE (irel->r_info) != (int) R_CR16_DISP24
1776 && ELF32_R_TYPE (irel->r_info) != (int) R_CR16_IMM32
1777 && ELF32_R_TYPE (irel->r_info) != (int) R_CR16_IMM20
1778 && ELF32_R_TYPE (irel->r_info) != (int) R_CR16_IMM16)
1781 /* Get the section contents if we haven't done so already. */
1782 if (contents == NULL)
1784 /* Get cached copy if it exists. */
1785 if (elf_section_data (sec)->this_hdr.contents != NULL)
1786 contents = elf_section_data (sec)->this_hdr.contents;
1787 /* Go get them off disk. */
1788 else if (!bfd_malloc_and_get_section (abfd, sec, &contents))
1792 /* Read this BFD's local symbols if we haven't done so already. */
1793 if (isymbuf == NULL && symtab_hdr->sh_info != 0)
1795 isymbuf = (Elf_Internal_Sym *) symtab_hdr->contents;
1796 if (isymbuf == NULL)
1797 isymbuf = bfd_elf_get_elf_syms (abfd, symtab_hdr,
1798 symtab_hdr->sh_info, 0,
1800 if (isymbuf == NULL)
1804 /* Get the value of the symbol referred to by the reloc. */
1805 if (ELF32_R_SYM (irel->r_info) < symtab_hdr->sh_info)
1807 /* A local symbol. */
1808 Elf_Internal_Sym *isym;
1811 isym = isymbuf + ELF32_R_SYM (irel->r_info);
1812 if (isym->st_shndx == SHN_UNDEF)
1813 sym_sec = bfd_und_section_ptr;
1814 else if (isym->st_shndx == SHN_ABS)
1815 sym_sec = bfd_abs_section_ptr;
1816 else if (isym->st_shndx == SHN_COMMON)
1817 sym_sec = bfd_com_section_ptr;
1819 sym_sec = bfd_section_from_elf_index (abfd, isym->st_shndx);
1820 symval = (isym->st_value
1821 + sym_sec->output_section->vma
1822 + sym_sec->output_offset);
1827 struct elf_link_hash_entry *h;
1829 /* An external symbol. */
1830 indx = ELF32_R_SYM (irel->r_info) - symtab_hdr->sh_info;
1831 h = elf_sym_hashes (abfd)[indx];
1832 BFD_ASSERT (h != NULL);
1834 if (h->root.type != bfd_link_hash_defined
1835 && h->root.type != bfd_link_hash_defweak)
1836 /* This appears to be a reference to an undefined
1837 symbol. Just ignore it--it will be caught by the
1838 regular reloc processing. */
1841 symval = (h->root.u.def.value
1842 + h->root.u.def.section->output_section->vma
1843 + h->root.u.def.section->output_offset);
1846 /* For simplicity of coding, we are going to modify the section
1847 contents, the section relocs, and the BFD symbol table. We
1848 must tell the rest of the code not to free up this
1849 information. It would be possible to instead create a table
1850 of changes which have to be made, as is done in coff-mips.c;
1851 that would be more work, but would require less memory when
1852 the linker is run. */
1854 /* Try to turn a 24 branch/call into a 16bit relative
1856 if (ELF32_R_TYPE (irel->r_info) == (int) R_CR16_DISP24)
1858 bfd_vma value = symval;
1860 /* Deal with pc-relative gunk. */
1861 value -= (sec->output_section->vma + sec->output_offset);
1862 value -= irel->r_offset;
1863 value += irel->r_addend;
1865 /* See if the value will fit in 16 bits, note the high value is
1866 0xfffe + 2 as the target will be two bytes closer if we are
1868 if ((long) value < 0x10000 && (long) value > -0x10002)
1872 /* Get the opcode. */
1873 code = (unsigned int) bfd_get_32 (abfd, contents + irel->r_offset);
1875 /* Verify it's a 'bcond' and fix the opcode. */
1876 if ((code & 0xffff) == 0x0010)
1877 bfd_put_16 (abfd, 0x1800 | ((0xf & (code >> 20)) << 4), contents + irel->r_offset);
1881 /* Note that we've changed the relocs, section contents, etc. */
1882 elf_section_data (sec)->relocs = internal_relocs;
1883 elf_section_data (sec)->this_hdr.contents = contents;
1884 symtab_hdr->contents = (unsigned char *) isymbuf;
1886 /* Fix the relocation's type. */
1887 irel->r_info = ELF32_R_INFO (ELF32_R_SYM (irel->r_info),
1890 /* Delete two bytes of data. */
1891 if (!elf32_cr16_relax_delete_bytes (link_info, abfd, sec,
1892 irel->r_offset + 2, 2))
1895 /* That will change things, so, we should relax again.
1896 Note that this is not required, and it may be slow. */
1901 /* Try to turn a 16bit pc-relative branch into an
1902 8bit pc-relative branch. */
1903 if (ELF32_R_TYPE (irel->r_info) == (int) R_CR16_DISP16)
1905 bfd_vma value = symval;
1907 /* Deal with pc-relative gunk. */
1908 value -= (sec->output_section->vma + sec->output_offset);
1909 value -= irel->r_offset;
1910 value += irel->r_addend;
1912 /* See if the value will fit in 8 bits, note the high value is
1913 0xfc + 2 as the target will be two bytes closer if we are
1915 /*if ((long) value < 0x1fa && (long) value > -0x100) REVISIT:range */
1916 if ((long) value < 0xfa && (long) value > -0x100)
1918 unsigned short code;
1920 /* Get the opcode. */
1921 code = (unsigned short) bfd_get_16 (abfd, contents + irel->r_offset);
1923 /* Verify it's a 'bcond' and fix the opcode. */
1924 if ((code & 0xff0f) == 0x1800)
1925 bfd_put_16 (abfd, (code & 0xf0f0), contents + irel->r_offset);
1929 /* Note that we've changed the relocs, section contents, etc. */
1930 elf_section_data (sec)->relocs = internal_relocs;
1931 elf_section_data (sec)->this_hdr.contents = contents;
1932 symtab_hdr->contents = (unsigned char *) isymbuf;
1934 /* Fix the relocation's type. */
1935 irel->r_info = ELF32_R_INFO (ELF32_R_SYM (irel->r_info),
1938 /* Delete two bytes of data. */
1939 if (!elf32_cr16_relax_delete_bytes (link_info, abfd, sec,
1940 irel->r_offset + 2, 2))
1943 /* That will change things, so, we should relax again.
1944 Note that this is not required, and it may be slow. */
1949 /* Try to turn a 32-bit IMM address into a 20/16-bit IMM address */
1950 if (ELF32_R_TYPE (irel->r_info) == (int) R_CR16_IMM32)
1952 bfd_vma value = symval;
1953 unsigned short is_add_mov = 0;
1956 /* Get the existing value from the mcode */
1957 value1 = ((bfd_get_32 (abfd, contents + irel->r_offset + 2) >> 16)
1958 |(((bfd_get_32 (abfd, contents + irel->r_offset + 2) & 0xffff) << 16)));
1960 /* See if the value will fit in 20 bits. */
1961 if ((long) (value + value1) < 0xfffff && (long) (value + value1) > 0)
1963 unsigned short code;
1965 /* Get the opcode. */
1966 code = (unsigned short) bfd_get_16 (abfd, contents + irel->r_offset);
1968 /* Verify it's a 'arithmetic ADDD or MOVD instruction'.
1969 For ADDD and MOVD only, convert to IMM32 -> IMM20. */
1971 if (((code & 0xfff0) == 0x0070) || ((code & 0xfff0) == 0x0020))
1976 /* Note that we've changed the relocs, section contents,
1978 elf_section_data (sec)->relocs = internal_relocs;
1979 elf_section_data (sec)->this_hdr.contents = contents;
1980 symtab_hdr->contents = (unsigned char *) isymbuf;
1982 /* Fix the opcode. */
1983 if ((code & 0xfff0) == 0x0070) /* For movd. */
1984 bfd_put_8 (abfd, 0x05, contents + irel->r_offset + 1);
1985 else /* code == 0x0020 for addd. */
1986 bfd_put_8 (abfd, 0x04, contents + irel->r_offset + 1);
1988 bfd_put_8 (abfd, (code & 0xf) << 4, contents + irel->r_offset);
1990 /* If existing value is nagavive adjust approriately
1991 place the 16-20bits (ie 4 bit) in new opcode,
1992 as the 0xffffxxxx, the higher 2 byte values removed. */
1993 if (value1 & 0x80000000)
1994 bfd_put_8 (abfd, (0x0f | (bfd_get_8(abfd, contents + irel->r_offset))), contents + irel->r_offset);
1996 bfd_put_8 (abfd, (((value1 >> 16)&0xf) | (bfd_get_8(abfd, contents + irel->r_offset))), contents + irel->r_offset);
1998 /* Fix the relocation's type. */
1999 irel->r_info = ELF32_R_INFO (ELF32_R_SYM (irel->r_info),
2002 /* Delete two bytes of data. */
2003 if (!elf32_cr16_relax_delete_bytes (link_info, abfd, sec,
2004 irel->r_offset + 2, 2))
2007 /* That will change things, so, we should relax again.
2008 Note that this is not required, and it may be slow. */
2013 /* See if the value will fit in 16 bits. */
2015 && ((long)(value + value1) < 0x7fff && (long)(value + value1) > 0))
2017 unsigned short code;
2019 /* Get the opcode. */
2020 code = (unsigned short) bfd_get_16 (abfd, contents + irel->r_offset);
2022 /* Note that we've changed the relocs, section contents, etc. */
2023 elf_section_data (sec)->relocs = internal_relocs;
2024 elf_section_data (sec)->this_hdr.contents = contents;
2025 symtab_hdr->contents = (unsigned char *) isymbuf;
2027 /* Fix the opcode. */
2028 if ((code & 0xf0) == 0x70) /* For movd. */
2029 bfd_put_8 (abfd, 0x54, contents + irel->r_offset + 1);
2030 else if ((code & 0xf0) == 0x20) /* For addd. */
2031 bfd_put_8 (abfd, 0x60, contents + irel->r_offset + 1);
2032 else if ((code & 0xf0) == 0x90) /* For cmpd. */
2033 bfd_put_8 (abfd, 0x56, contents + irel->r_offset + 1);
2037 bfd_put_8 (abfd, 0xb0 | (code & 0xf), contents + irel->r_offset);
2039 /* If existing value is nagavive adjust approriately
2040 place the 12-16bits (ie 4 bit) in new opcode,
2041 as the 0xfffffxxx, the higher 2 byte values removed. */
2042 if (value1 & 0x80000000)
2043 bfd_put_8 (abfd, (0x0f | (bfd_get_8(abfd, contents + irel->r_offset))), contents + irel->r_offset);
2045 bfd_put_16 (abfd, value1, contents + irel->r_offset + 2);
2048 /* Fix the relocation's type. */
2049 irel->r_info = ELF32_R_INFO (ELF32_R_SYM (irel->r_info),
2052 /* Delete two bytes of data. */
2053 if (!elf32_cr16_relax_delete_bytes (link_info, abfd, sec,
2054 irel->r_offset + 2, 2))
2057 /* That will change things, so, we should relax again.
2058 Note that this is not required, and it may be slow. */
2064 /* Try to turn a 16bit immediate address into a 4bit
2065 immediate address. */
2066 if ((ELF32_R_TYPE (irel->r_info) == (int) R_CR16_IMM20)
2067 || (ELF32_R_TYPE (irel->r_info) == (int) R_CR16_IMM16))
2069 bfd_vma value = symval;
2072 /* Get the existing value from the mcode */
2073 value1 = ((bfd_get_16 (abfd, contents + irel->r_offset + 2) & 0xffff));
2075 if (ELF32_R_TYPE (irel->r_info) == (int) R_CR16_IMM20)
2077 value1 |= ((bfd_get_16 (abfd, contents + irel->r_offset + 1) & 0xf000) << 0x4);
2080 /* See if the value will fit in 4 bits. */
2081 if ((((long) (value + value1)) < 0xf)
2082 && (((long) (value + value1)) > 0))
2084 unsigned short code;
2086 /* Get the opcode. */
2087 code = (unsigned short) bfd_get_16 (abfd, contents + irel->r_offset);
2089 /* Note that we've changed the relocs, section contents, etc. */
2090 elf_section_data (sec)->relocs = internal_relocs;
2091 elf_section_data (sec)->this_hdr.contents = contents;
2092 symtab_hdr->contents = (unsigned char *) isymbuf;
2094 /* Fix the opcode. */
2095 if (((code & 0x0f00) == 0x0400) || ((code & 0x0f00) == 0x0500))
2097 if ((code & 0x0f00) == 0x0400) /* For movd imm20. */
2098 bfd_put_8 (abfd, 0x60, contents + irel->r_offset);
2099 else /* For addd imm20. */
2100 bfd_put_8 (abfd, 0x54, contents + irel->r_offset);
2101 bfd_put_8 (abfd, (code & 0xf0) >> 4, contents + irel->r_offset + 1);
2105 if ((code & 0xfff0) == 0x56b0) /* For cmpd imm16. */
2106 bfd_put_8 (abfd, 0x56, contents + irel->r_offset);
2107 else if ((code & 0xfff0) == 0x54b0) /* For movd imm16. */
2108 bfd_put_8 (abfd, 0x54, contents + irel->r_offset);
2109 else if ((code & 0xfff0) == 0x58b0) /* For movb imm16. */
2110 bfd_put_8 (abfd, 0x58, contents + irel->r_offset);
2111 else if ((code & 0xfff0) == 0x5Ab0) /* For movw imm16. */
2112 bfd_put_8 (abfd, 0x5A, contents + irel->r_offset);
2113 else if ((code & 0xfff0) == 0x60b0) /* For addd imm16. */
2114 bfd_put_8 (abfd, 0x60, contents + irel->r_offset);
2115 else if ((code & 0xfff0) == 0x30b0) /* For addb imm16. */
2116 bfd_put_8 (abfd, 0x30, contents + irel->r_offset);
2117 else if ((code & 0xfff0) == 0x2Cb0) /* For addub imm16. */
2118 bfd_put_8 (abfd, 0x2C, contents + irel->r_offset);
2119 else if ((code & 0xfff0) == 0x32b0) /* For adduw imm16. */
2120 bfd_put_8 (abfd, 0x32, contents + irel->r_offset);
2121 else if ((code & 0xfff0) == 0x38b0) /* For subb imm16. */
2122 bfd_put_8 (abfd, 0x38, contents + irel->r_offset);
2123 else if ((code & 0xfff0) == 0x3Cb0) /* For subcb imm16. */
2124 bfd_put_8 (abfd, 0x3C, contents + irel->r_offset);
2125 else if ((code & 0xfff0) == 0x3Fb0) /* For subcw imm16. */
2126 bfd_put_8 (abfd, 0x3F, contents + irel->r_offset);
2127 else if ((code & 0xfff0) == 0x3Ab0) /* For subw imm16. */
2128 bfd_put_8 (abfd, 0x3A, contents + irel->r_offset);
2129 else if ((code & 0xfff0) == 0x50b0) /* For cmpb imm16. */
2130 bfd_put_8 (abfd, 0x50, contents + irel->r_offset);
2131 else if ((code & 0xfff0) == 0x52b0) /* For cmpw imm16. */
2132 bfd_put_8 (abfd, 0x52, contents + irel->r_offset);
2136 bfd_put_8 (abfd, (code & 0xf), contents + irel->r_offset + 1);
2139 /* Fix the relocation's type. */
2140 irel->r_info = ELF32_R_INFO (ELF32_R_SYM (irel->r_info),
2143 /* Delete two bytes of data. */
2144 if (!elf32_cr16_relax_delete_bytes (link_info, abfd, sec,
2145 irel->r_offset + 2, 2))
2148 /* That will change things, so, we should relax again.
2149 Note that this is not required, and it may be slow. */
2157 && symtab_hdr->contents != (unsigned char *) isymbuf)
2159 if (! link_info->keep_memory)
2162 /* Cache the symbols for elf_link_input_bfd. */
2163 symtab_hdr->contents = (unsigned char *) isymbuf;
2166 if (contents != NULL
2167 && elf_section_data (sec)->this_hdr.contents != contents)
2169 if (! link_info->keep_memory)
2172 /* Cache the section contents for elf_link_input_bfd. */
2173 elf_section_data (sec)->this_hdr.contents = contents;
2177 if (internal_relocs != NULL
2178 && elf_section_data (sec)->relocs != internal_relocs)
2179 free (internal_relocs);
2185 && symtab_hdr->contents != (unsigned char *) isymbuf)
2187 if (contents != NULL
2188 && elf_section_data (sec)->this_hdr.contents != contents)
2190 if (internal_relocs != NULL
2191 && elf_section_data (sec)->relocs != internal_relocs)
2192 free (internal_relocs);
2198 elf32_cr16_gc_mark_hook (asection *sec,
2199 struct bfd_link_info *info,
2200 Elf_Internal_Rela *rel,
2201 struct elf_link_hash_entry *h,
2202 Elf_Internal_Sym *sym)
2204 return _bfd_elf_gc_mark_hook (sec, info, rel, h, sym);
2207 /* Create dynamic sections when linking against a dynamic object. */
2210 _bfd_cr16_elf_create_dynamic_sections (bfd *abfd, struct bfd_link_info *info)
2214 const struct elf_backend_data * bed = get_elf_backend_data (abfd);
2215 struct elf_link_hash_table *htab = elf_hash_table (info);
2218 switch (bed->s->arch_size)
2229 bfd_set_error (bfd_error_bad_value);
2233 /* We need to create .plt, .rel[a].plt, .got, .got.plt, .dynbss, and
2234 .rel[a].bss sections. */
2236 flags = (SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS | SEC_IN_MEMORY
2237 | SEC_LINKER_CREATED);
2239 s = bfd_make_section_anyway_with_flags (abfd,
2240 (bed->default_use_rela_p
2241 ? ".rela.plt" : ".rel.plt"),
2242 flags | SEC_READONLY);
2245 || ! bfd_set_section_alignment (abfd, s, ptralign))
2248 if (! _bfd_cr16_elf_create_got_section (abfd, info))
2251 if (bed->want_dynbss)
2253 /* The .dynbss section is a place to put symbols which are defined
2254 by dynamic objects, are referenced by regular objects, and are
2255 not functions. We must allocate space for them in the process
2256 image and use a R_*_COPY reloc to tell the dynamic linker to
2257 initialize them at run time. The linker script puts the .dynbss
2258 section into the .bss section of the final image. */
2259 s = bfd_make_section_anyway_with_flags (abfd, ".dynbss",
2260 SEC_ALLOC | SEC_LINKER_CREATED);
2264 /* The .rel[a].bss section holds copy relocs. This section is not
2265 normally needed. We need to create it here, though, so that the
2266 linker will map it to an output section. We can't just create it
2267 only if we need it, because we will not know whether we need it
2268 until we have seen all the input files, and the first time the
2269 main linker code calls BFD after examining all the input files
2270 (size_dynamic_sections) the input sections have already been
2271 mapped to the output sections. If the section turns out not to
2272 be needed, we can discard it later. We will never need this
2273 section when generating a shared object, since they do not use
2275 if (! bfd_link_executable (info))
2277 s = bfd_make_section_anyway_with_flags (abfd,
2278 (bed->default_use_rela_p
2279 ? ".rela.bss" : ".rel.bss"),
2280 flags | SEC_READONLY);
2282 || ! bfd_set_section_alignment (abfd, s, ptralign))
2290 /* Adjust a symbol defined by a dynamic object and referenced by a
2291 regular object. The current definition is in some section of the
2292 dynamic object, but we're not including those sections. We have to
2293 change the definition to something the rest of the link can
2297 _bfd_cr16_elf_adjust_dynamic_symbol (struct bfd_link_info * info,
2298 struct elf_link_hash_entry * h)
2303 dynobj = elf_hash_table (info)->dynobj;
2305 /* Make sure we know what is going on here. */
2306 BFD_ASSERT (dynobj != NULL
2311 && !h->def_regular)));
2313 /* If this is a function, put it in the procedure linkage table. We
2314 will fill in the contents of the procedure linkage table later,
2315 when we know the address of the .got section. */
2316 if (h->type == STT_FUNC
2319 if (! bfd_link_executable (info)
2323 /* This case can occur if we saw a PLT reloc in an input
2324 file, but the symbol was never referred to by a dynamic
2325 object. In such a case, we don't actually need to build
2326 a procedure linkage table, and we can just do a REL32
2328 BFD_ASSERT (h->needs_plt);
2332 /* Make sure this symbol is output as a dynamic symbol. */
2333 if (h->dynindx == -1)
2335 if (! bfd_elf_link_record_dynamic_symbol (info, h))
2339 /* We also need to make an entry in the .got.plt section, which
2340 will be placed in the .got section by the linker script. */
2342 s = elf_hash_table (info)->sgotplt;
2343 BFD_ASSERT (s != NULL);
2346 /* We also need to make an entry in the .rela.plt section. */
2348 s = elf_hash_table (info)->srelplt;
2349 BFD_ASSERT (s != NULL);
2350 s->size += sizeof (Elf32_External_Rela);
2355 /* If this is a weak symbol, and there is a real definition, the
2356 processor independent code will have arranged for us to see the
2357 real definition first, and we can just use the same value. */
2358 if (h->is_weakalias)
2360 struct elf_link_hash_entry *def = weakdef (h);
2361 BFD_ASSERT (def->root.type == bfd_link_hash_defined);
2362 h->root.u.def.section = def->root.u.def.section;
2363 h->root.u.def.value = def->root.u.def.value;
2367 /* This is a reference to a symbol defined by a dynamic object which
2368 is not a function. */
2370 /* If we are creating a shared library, we must presume that the
2371 only references to the symbol are via the global offset table.
2372 For such cases we need not do anything here; the relocations will
2373 be handled correctly by relocate_section. */
2374 if (bfd_link_executable (info))
2377 /* If there are no references to this symbol that do not use the
2378 GOT, we don't need to generate a copy reloc. */
2379 if (!h->non_got_ref)
2382 /* We must allocate the symbol in our .dynbss section, which will
2383 become part of the .bss section of the executable. There will be
2384 an entry for this symbol in the .dynsym section. The dynamic
2385 object will contain position independent code, so all references
2386 from the dynamic object to this symbol will go through the global
2387 offset table. The dynamic linker will use the .dynsym entry to
2388 determine the address it must put in the global offset table, so
2389 both the dynamic object and the regular object will refer to the
2390 same memory location for the variable. */
2392 s = bfd_get_linker_section (dynobj, ".dynbss");
2393 BFD_ASSERT (s != NULL);
2395 /* We must generate a R_CR16_COPY reloc to tell the dynamic linker to
2396 copy the initial value out of the dynamic object and into the
2397 runtime process image. We need to remember the offset into the
2398 .rela.bss section we are going to use. */
2399 if ((h->root.u.def.section->flags & SEC_ALLOC) != 0 && h->size != 0)
2403 srel = bfd_get_linker_section (dynobj, ".rela.bss");
2404 BFD_ASSERT (srel != NULL);
2405 srel->size += sizeof (Elf32_External_Rela);
2409 return _bfd_elf_adjust_dynamic_copy (info, h, s);
2412 /* Set the sizes of the dynamic sections. */
2415 _bfd_cr16_elf_size_dynamic_sections (bfd * output_bfd,
2416 struct bfd_link_info * info)
2422 bfd_boolean reltext;
2424 dynobj = elf_hash_table (info)->dynobj;
2425 BFD_ASSERT (dynobj != NULL);
2427 if (elf_hash_table (info)->dynamic_sections_created)
2429 /* Set the contents of the .interp section to the interpreter. */
2430 if (bfd_link_executable (info) && !info->nointerp)
2433 s = bfd_get_linker_section (dynobj, ".interp");
2434 BFD_ASSERT (s != NULL);
2435 s->size = sizeof ELF_DYNAMIC_INTERPRETER;
2436 s->contents = (unsigned char *) ELF_DYNAMIC_INTERPRETER;
2442 /* We may have created entries in the .rela.got section.
2443 However, if we are not creating the dynamic sections, we will
2444 not actually use these entries. Reset the size of .rela.got,
2445 which will cause it to get stripped from the output file
2447 s = elf_hash_table (info)->srelgot;
2452 /* The check_relocs and adjust_dynamic_symbol entry points have
2453 determined the sizes of the various dynamic sections. Allocate
2458 for (s = dynobj->sections; s != NULL; s = s->next)
2462 if ((s->flags & SEC_LINKER_CREATED) == 0)
2465 /* It's OK to base decisions on the section name, because none
2466 of the dynobj section names depend upon the input files. */
2467 name = bfd_get_section_name (dynobj, s);
2469 if (strcmp (name, ".plt") == 0)
2471 /* Remember whether there is a PLT. */
2474 else if (CONST_STRNEQ (name, ".rela"))
2480 /* Remember whether there are any reloc sections other
2482 if (strcmp (name, ".rela.plt") != 0)
2484 const char * outname;
2488 /* If this relocation section applies to a read only
2489 section, then we probably need a DT_TEXTREL
2490 entry. The entries in the .rela.plt section
2491 really apply to the .got section, which we
2492 created ourselves and so know is not readonly. */
2493 outname = bfd_get_section_name (output_bfd,
2495 target = bfd_get_section_by_name (output_bfd, outname + 5);
2497 && (target->flags & SEC_READONLY) != 0
2498 && (target->flags & SEC_ALLOC) != 0)
2502 /* We use the reloc_count field as a counter if we need
2503 to copy relocs into the output file. */
2507 else if (! CONST_STRNEQ (name, ".got")
2508 && strcmp (name, ".dynbss") != 0)
2509 /* It's not one of our sections, so don't allocate space. */
2514 /* If we don't need this section, strip it from the
2515 output file. This is mostly to handle .rela.bss and
2516 .rela.plt. We must create both sections in
2517 create_dynamic_sections, because they must be created
2518 before the linker maps input sections to output
2519 sections. The linker does that before
2520 adjust_dynamic_symbol is called, and it is that
2521 function which decides whether anything needs to go
2522 into these sections. */
2523 s->flags |= SEC_EXCLUDE;
2527 if ((s->flags & SEC_HAS_CONTENTS) == 0)
2530 /* Allocate memory for the section contents. We use bfd_zalloc
2531 here in case unused entries are not reclaimed before the
2532 section's contents are written out. This should not happen,
2533 but this way if it does, we get a R_CR16_NONE reloc
2534 instead of garbage. */
2535 s->contents = (bfd_byte *) bfd_zalloc (dynobj, s->size);
2536 if (s->contents == NULL)
2540 if (elf_hash_table (info)->dynamic_sections_created)
2542 /* Add some entries to the .dynamic section. We fill in the
2543 values later, in _bfd_cr16_elf_finish_dynamic_sections,
2544 but we must add the entries now so that we get the correct
2545 size for the .dynamic section. The DT_DEBUG entry is filled
2546 in by the dynamic linker and used by the debugger. */
2547 if (! bfd_link_executable (info))
2549 if (!_bfd_elf_add_dynamic_entry (info, DT_DEBUG, 0))
2555 if (!_bfd_elf_add_dynamic_entry (info, DT_PLTGOT, 0)
2556 || !_bfd_elf_add_dynamic_entry (info, DT_PLTRELSZ, 0)
2557 || !_bfd_elf_add_dynamic_entry (info, DT_PLTREL, DT_RELA)
2558 || !_bfd_elf_add_dynamic_entry (info, DT_JMPREL, 0))
2564 if (!_bfd_elf_add_dynamic_entry (info, DT_RELA, 0)
2565 || !_bfd_elf_add_dynamic_entry (info, DT_RELASZ, 0)
2566 || !_bfd_elf_add_dynamic_entry (info, DT_RELAENT,
2567 sizeof (Elf32_External_Rela)))
2573 if (!_bfd_elf_add_dynamic_entry (info, DT_TEXTREL, 0))
2581 /* Finish up dynamic symbol handling. We set the contents of various
2582 dynamic sections here. */
2585 _bfd_cr16_elf_finish_dynamic_symbol (bfd * output_bfd,
2586 struct bfd_link_info * info,
2587 struct elf_link_hash_entry * h,
2588 Elf_Internal_Sym * sym)
2592 dynobj = elf_hash_table (info)->dynobj;
2594 if (h->got.offset != (bfd_vma) -1)
2598 Elf_Internal_Rela rel;
2600 /* This symbol has an entry in the global offset table. Set it up. */
2602 sgot = elf_hash_table (info)->sgot;
2603 srel = elf_hash_table (info)->srelgot;
2604 BFD_ASSERT (sgot != NULL && srel != NULL);
2606 rel.r_offset = (sgot->output_section->vma
2607 + sgot->output_offset
2608 + (h->got.offset & ~1));
2610 /* If this is a -Bsymbolic link, and the symbol is defined
2611 locally, we just want to emit a RELATIVE reloc. Likewise if
2612 the symbol was forced to be local because of a version file.
2613 The entry in the global offset table will already have been
2614 initialized in the relocate_section function. */
2615 if (bfd_link_executable (info)
2616 && (info->symbolic || h->dynindx == -1)
2619 rel.r_info = ELF32_R_INFO (0, R_CR16_GOT_REGREL20);
2620 rel.r_addend = (h->root.u.def.value
2621 + h->root.u.def.section->output_section->vma
2622 + h->root.u.def.section->output_offset);
2626 bfd_put_32 (output_bfd, (bfd_vma) 0, sgot->contents + h->got.offset);
2627 rel.r_info = ELF32_R_INFO (h->dynindx, R_CR16_GOT_REGREL20);
2631 bfd_elf32_swap_reloca_out (output_bfd, &rel,
2632 (bfd_byte *) ((Elf32_External_Rela *) srel->contents
2633 + srel->reloc_count));
2634 ++ srel->reloc_count;
2640 Elf_Internal_Rela rel;
2642 /* This symbol needs a copy reloc. Set it up. */
2643 BFD_ASSERT (h->dynindx != -1
2644 && (h->root.type == bfd_link_hash_defined
2645 || h->root.type == bfd_link_hash_defweak));
2647 s = bfd_get_linker_section (dynobj, ".rela.bss");
2648 BFD_ASSERT (s != NULL);
2650 rel.r_offset = (h->root.u.def.value
2651 + h->root.u.def.section->output_section->vma
2652 + h->root.u.def.section->output_offset);
2653 rel.r_info = ELF32_R_INFO (h->dynindx, R_CR16_GOT_REGREL20);
2655 bfd_elf32_swap_reloca_out (output_bfd, &rel,
2656 (bfd_byte *) ((Elf32_External_Rela *) s->contents
2661 /* Mark _DYNAMIC and _GLOBAL_OFFSET_TABLE_ as absolute. */
2662 if (h == elf_hash_table (info)->hdynamic
2663 || h == elf_hash_table (info)->hgot)
2664 sym->st_shndx = SHN_ABS;
2669 /* Finish up the dynamic sections. */
2672 _bfd_cr16_elf_finish_dynamic_sections (bfd * output_bfd,
2673 struct bfd_link_info * info)
2679 dynobj = elf_hash_table (info)->dynobj;
2681 sgot = elf_hash_table (info)->sgotplt;
2682 BFD_ASSERT (sgot != NULL);
2683 sdyn = bfd_get_linker_section (dynobj, ".dynamic");
2685 if (elf_hash_table (info)->dynamic_sections_created)
2687 Elf32_External_Dyn * dyncon;
2688 Elf32_External_Dyn * dynconend;
2690 BFD_ASSERT (sdyn != NULL);
2692 dyncon = (Elf32_External_Dyn *) sdyn->contents;
2693 dynconend = (Elf32_External_Dyn *) (sdyn->contents + sdyn->size);
2695 for (; dyncon < dynconend; dyncon++)
2697 Elf_Internal_Dyn dyn;
2700 bfd_elf32_swap_dyn_in (dynobj, dyncon, &dyn);
2708 s = elf_hash_table (info)->sgotplt;
2712 s = elf_hash_table (info)->srelplt;
2714 dyn.d_un.d_ptr = s->output_section->vma + s->output_offset;
2715 bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon);
2719 s = elf_hash_table (info)->srelplt;
2720 dyn.d_un.d_val = s->size;
2721 bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon);
2728 /* Fill in the first three entries in the global offset table. */
2732 bfd_put_32 (output_bfd, (bfd_vma) 0, sgot->contents);
2734 bfd_put_32 (output_bfd,
2735 sdyn->output_section->vma + sdyn->output_offset,
2739 elf_section_data (sgot->output_section)->this_hdr.sh_entsize = 4;
2744 /* Given a .data.rel section and a .emreloc in-memory section, store
2745 relocation information into the .emreloc section which can be
2746 used at runtime to relocate the section. This is called by the
2747 linker when the --embedded-relocs switch is used. This is called
2748 after the add_symbols entry point has been called for all the
2749 objects, and before the final_link entry point is called. */
2752 bfd_cr16_elf32_create_embedded_relocs (bfd *abfd,
2753 struct bfd_link_info *info,
2758 Elf_Internal_Shdr *symtab_hdr;
2759 Elf_Internal_Sym *isymbuf = NULL;
2760 Elf_Internal_Rela *internal_relocs = NULL;
2761 Elf_Internal_Rela *irel, *irelend;
2765 BFD_ASSERT (! bfd_link_relocatable (info));
2769 if (datasec->reloc_count == 0)
2772 symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
2774 /* Get a copy of the native relocations. */
2775 internal_relocs = (_bfd_elf_link_read_relocs
2776 (abfd, datasec, NULL, NULL, info->keep_memory));
2777 if (internal_relocs == NULL)
2780 amt = (bfd_size_type) datasec->reloc_count * 8;
2781 relsec->contents = (bfd_byte *) bfd_alloc (abfd, amt);
2782 if (relsec->contents == NULL)
2785 p = relsec->contents;
2787 irelend = internal_relocs + datasec->reloc_count;
2788 for (irel = internal_relocs; irel < irelend; irel++, p += 8)
2790 asection *targetsec;
2792 /* We are going to write a four byte longword into the runtime
2793 reloc section. The longword will be the address in the data
2794 section which must be relocated. It is followed by the name
2795 of the target section NUL-padded or truncated to 8
2798 /* We can only relocate absolute longword relocs at run time. */
2799 if (!((ELF32_R_TYPE (irel->r_info) == (int) R_CR16_NUM32a)
2800 || (ELF32_R_TYPE (irel->r_info) == (int) R_CR16_NUM32)))
2802 *errmsg = _("unsupported relocation type");
2803 bfd_set_error (bfd_error_bad_value);
2807 /* Get the target section referred to by the reloc. */
2808 if (ELF32_R_SYM (irel->r_info) < symtab_hdr->sh_info)
2810 /* A local symbol. */
2811 Elf_Internal_Sym *isym;
2813 /* Read this BFD's local symbols if we haven't done so already. */
2814 if (isymbuf == NULL)
2816 isymbuf = (Elf_Internal_Sym *) symtab_hdr->contents;
2817 if (isymbuf == NULL)
2818 isymbuf = bfd_elf_get_elf_syms (abfd, symtab_hdr,
2819 symtab_hdr->sh_info, 0,
2821 if (isymbuf == NULL)
2825 isym = isymbuf + ELF32_R_SYM (irel->r_info);
2826 targetsec = bfd_section_from_elf_index (abfd, isym->st_shndx);
2831 struct elf_link_hash_entry *h;
2833 /* An external symbol. */
2834 indx = ELF32_R_SYM (irel->r_info) - symtab_hdr->sh_info;
2835 h = elf_sym_hashes (abfd)[indx];
2836 BFD_ASSERT (h != NULL);
2837 if (h->root.type == bfd_link_hash_defined
2838 || h->root.type == bfd_link_hash_defweak)
2839 targetsec = h->root.u.def.section;
2844 bfd_put_32 (abfd, irel->r_offset + datasec->output_offset, p);
2845 memset (p + 4, 0, 4);
2846 if ((ELF32_R_TYPE (irel->r_info) == (int) R_CR16_NUM32a)
2847 && (targetsec != NULL) )
2848 strncpy ((char *) p + 4, targetsec->output_section->name, 4);
2851 if (isymbuf != NULL && symtab_hdr->contents != (unsigned char *) isymbuf)
2853 if (internal_relocs != NULL
2854 && elf_section_data (datasec)->relocs != internal_relocs)
2855 free (internal_relocs);
2859 if (isymbuf != NULL && symtab_hdr->contents != (unsigned char *) isymbuf)
2861 if (internal_relocs != NULL
2862 && elf_section_data (datasec)->relocs != internal_relocs)
2863 free (internal_relocs);
2868 /* Classify relocation types, such that combreloc can sort them
2871 static enum elf_reloc_type_class
2872 _bfd_cr16_elf_reloc_type_class (const struct bfd_link_info *info ATTRIBUTE_UNUSED,
2873 const asection *rel_sec ATTRIBUTE_UNUSED,
2874 const Elf_Internal_Rela *rela)
2876 switch ((int) ELF32_R_TYPE (rela->r_info))
2878 case R_CR16_GOT_REGREL20:
2879 case R_CR16_GOTC_REGREL20:
2880 return reloc_class_relative;
2882 return reloc_class_normal;
2886 /* Definitions for setting CR16 target vector. */
2887 #define TARGET_LITTLE_SYM cr16_elf32_vec
2888 #define TARGET_LITTLE_NAME "elf32-cr16"
2889 #define ELF_ARCH bfd_arch_cr16
2890 #define ELF_MACHINE_CODE EM_CR16
2891 #define ELF_MACHINE_ALT1 EM_CR16_OLD
2892 #define ELF_MAXPAGESIZE 0x1
2893 #define elf_symbol_leading_char '_'
2895 #define bfd_elf32_bfd_reloc_type_lookup elf_cr16_reloc_type_lookup
2896 #define bfd_elf32_bfd_reloc_name_lookup elf_cr16_reloc_name_lookup
2897 #define elf_info_to_howto elf_cr16_info_to_howto
2898 #define elf_info_to_howto_rel 0
2899 #define elf_backend_relocate_section elf32_cr16_relocate_section
2900 #define bfd_elf32_bfd_relax_section elf32_cr16_relax_section
2901 #define bfd_elf32_bfd_get_relocated_section_contents \
2902 elf32_cr16_get_relocated_section_contents
2903 #define elf_backend_gc_mark_hook elf32_cr16_gc_mark_hook
2904 #define elf_backend_can_gc_sections 1
2905 #define elf_backend_rela_normal 1
2906 #define elf_backend_check_relocs cr16_elf_check_relocs
2907 /* So we can set bits in e_flags. */
2908 #define elf_backend_final_write_processing \
2909 _bfd_cr16_elf_final_write_processing
2910 #define elf_backend_object_p _bfd_cr16_elf_object_p
2912 #define bfd_elf32_bfd_merge_private_bfd_data \
2913 _bfd_cr16_elf_merge_private_bfd_data
2916 #define bfd_elf32_bfd_link_hash_table_create \
2917 elf32_cr16_link_hash_table_create
2919 #define elf_backend_create_dynamic_sections \
2920 _bfd_cr16_elf_create_dynamic_sections
2921 #define elf_backend_adjust_dynamic_symbol \
2922 _bfd_cr16_elf_adjust_dynamic_symbol
2923 #define elf_backend_size_dynamic_sections \
2924 _bfd_cr16_elf_size_dynamic_sections
2925 #define elf_backend_omit_section_dynsym _bfd_elf_omit_section_dynsym_all
2926 #define elf_backend_finish_dynamic_symbol \
2927 _bfd_cr16_elf_finish_dynamic_symbol
2928 #define elf_backend_finish_dynamic_sections \
2929 _bfd_cr16_elf_finish_dynamic_sections
2931 #define elf_backend_reloc_type_class _bfd_cr16_elf_reloc_type_class
2934 #define elf_backend_want_got_plt 1
2935 #define elf_backend_plt_readonly 1
2936 #define elf_backend_want_plt_sym 0
2937 #define elf_backend_got_header_size 12
2938 #define elf_backend_dtrel_excludes_plt 1
2940 #include "elf32-target.h"