1 /* Lattice Mico32-specific support for 32-bit ELF
2 Copyright 2008 Free Software Foundation, Inc.
3 Contributed by Jon Beniston <jon@beniston.com>
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
19 Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston,
20 MA 02110-1301, USA. */
28 #define DEFAULT_STACK_SIZE 0x20000
30 #define PLT_ENTRY_SIZE 20
32 #define PLT0_ENTRY_WORD0 0
33 #define PLT0_ENTRY_WORD1 0
34 #define PLT0_ENTRY_WORD2 0
35 #define PLT0_ENTRY_WORD3 0
36 #define PLT0_ENTRY_WORD4 0
38 #define PLT0_PIC_ENTRY_WORD0 0
39 #define PLT0_PIC_ENTRY_WORD1 0
40 #define PLT0_PIC_ENTRY_WORD2 0
41 #define PLT0_PIC_ENTRY_WORD3 0
42 #define PLT0_PIC_ENTRY_WORD4 0
44 #define ELF_DYNAMIC_INTERPRETER "/usr/lib/libc.so.1"
46 extern const bfd_target bfd_elf32_lm32fdpic_vec;
48 #define IS_FDPIC(bfd) ((bfd)->xvec == &bfd_elf32_lm32fdpic_vec)
50 static bfd_reloc_status_type lm32_elf_gprel_reloc
51 (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **);
53 /* The linker needs to keep track of the number of relocs that it
54 decides to copy as dynamic relocs in check_relocs for each symbol.
55 This is so that it can later discard them if they are found to be
56 unnecessary. We store the information in a field extending the
57 regular ELF linker hash table. */
59 struct elf_lm32_dyn_relocs
61 struct elf_lm32_dyn_relocs *next;
63 /* The input section of the reloc. */
66 /* Total number of relocs copied for the input section. */
69 /* Number of pc-relative relocs copied for the input section. */
70 bfd_size_type pc_count;
73 /* lm32 ELF linker hash entry. */
75 struct elf_lm32_link_hash_entry
77 struct elf_link_hash_entry root;
79 /* Track dynamic relocs copied for this symbol. */
80 struct elf_lm32_dyn_relocs *dyn_relocs;
83 /* lm32 ELF linker hash table. */
85 struct elf_lm32_link_hash_table
87 struct elf_link_hash_table root;
89 /* Short-cuts to get to dynamic linker sections. */
102 /* Get the lm32 ELF linker hash table from a link_info structure. */
104 #define lm32_elf_hash_table(p) \
105 ((struct elf_lm32_link_hash_table *) ((p)->hash))
107 #define lm32fdpic_got_section(info) \
108 (lm32_elf_hash_table (info)->sgot)
109 #define lm32fdpic_gotrel_section(info) \
110 (lm32_elf_hash_table (info)->srelgot)
111 #define lm32fdpic_fixup32_section(info) \
112 (lm32_elf_hash_table (info)->sfixup32)
114 struct weak_symbol_list
117 struct weak_symbol_list *next;
120 /* Create an entry in an lm32 ELF linker hash table. */
122 static struct bfd_hash_entry *
123 lm32_elf_link_hash_newfunc (struct bfd_hash_entry *entry,
124 struct bfd_hash_table *table,
127 struct elf_lm32_link_hash_entry *ret =
128 (struct elf_lm32_link_hash_entry *) entry;
130 /* Allocate the structure if it has not already been allocated by a
133 ret = bfd_hash_allocate (table,
134 sizeof (struct elf_lm32_link_hash_entry));
138 /* Call the allocation method of the superclass. */
139 ret = ((struct elf_lm32_link_hash_entry *)
140 _bfd_elf_link_hash_newfunc ((struct bfd_hash_entry *) ret,
144 struct elf_lm32_link_hash_entry *eh;
146 eh = (struct elf_lm32_link_hash_entry *) ret;
147 eh->dyn_relocs = NULL;
150 return (struct bfd_hash_entry *) ret;
153 /* Create an lm32 ELF linker hash table. */
155 static struct bfd_link_hash_table *
156 lm32_elf_link_hash_table_create (bfd *abfd)
158 struct elf_lm32_link_hash_table *ret;
159 bfd_size_type amt = sizeof (struct elf_lm32_link_hash_table);
161 ret = bfd_malloc (amt);
165 if (!_bfd_elf_link_hash_table_init (&ret->root, abfd,
166 lm32_elf_link_hash_newfunc,
167 sizeof (struct elf_lm32_link_hash_entry)))
176 ret->sfixup32 = NULL;
183 return &ret->root.root;
186 /* Add a fixup to the ROFIXUP section. */
189 _lm32fdpic_add_rofixup (bfd *output_bfd, asection *rofixup, bfd_vma relocation)
191 bfd_vma fixup_offset;
193 if (rofixup->flags & SEC_EXCLUDE)
196 fixup_offset = rofixup->reloc_count * 4;
197 if (rofixup->contents)
199 BFD_ASSERT (fixup_offset < rofixup->size);
200 if (fixup_offset < rofixup->size)
201 bfd_put_32 (output_bfd, relocation, rofixup->contents + fixup_offset);
203 rofixup->reloc_count++;
208 /* Create .got, .gotplt, and .rela.got sections in DYNOBJ, and set up
209 shortcuts to them in our hash table. */
212 create_got_section (bfd *dynobj, struct bfd_link_info *info)
214 struct elf_lm32_link_hash_table *htab;
217 /* This function may be called more than once. */
218 s = bfd_get_section_by_name (dynobj, ".got");
219 if (s != NULL && (s->flags & SEC_LINKER_CREATED) != 0)
222 if (! _bfd_elf_create_got_section (dynobj, info))
225 htab = lm32_elf_hash_table (info);
226 htab->sgot = bfd_get_section_by_name (dynobj, ".got");
227 htab->sgotplt = bfd_get_section_by_name (dynobj, ".got.plt");
228 if (! htab->sgot || ! htab->sgotplt)
231 htab->srelgot = bfd_make_section_with_flags (dynobj, ".rela.got",
238 if (htab->srelgot == NULL
239 || ! bfd_set_section_alignment (dynobj, htab->srelgot, 2))
245 /* Create .rofixup sections in DYNOBJ, and set up
246 shortcuts to them in our hash table. */
249 create_rofixup_section (bfd *dynobj, struct bfd_link_info *info)
251 struct elf_lm32_link_hash_table *htab;
252 htab = lm32_elf_hash_table (info);
254 /* Fixup section for R_LM32_32 relocs */
255 lm32fdpic_fixup32_section (info) = bfd_make_section_with_flags (dynobj,
263 if (lm32fdpic_fixup32_section (info) == NULL
264 || ! bfd_set_section_alignment (dynobj, lm32fdpic_fixup32_section (info), 2))
270 static reloc_howto_type lm32_elf_howto_table [] =
272 /* This reloc does nothing. */
273 HOWTO (R_LM32_NONE, /* type */
275 2, /* size (0 = byte, 1 = short, 2 = long) */
277 FALSE, /* pc_relative */
279 complain_overflow_bitfield,/* complain_on_overflow */
280 bfd_elf_generic_reloc, /* special_function */
281 "R_LM32_NONE", /* name */
282 FALSE, /* partial_inplace */
285 FALSE), /* pcrel_offset */
287 /* An 8 bit absolute relocation. */
288 HOWTO (R_LM32_8, /* type */
290 0, /* size (0 = byte, 1 = short, 2 = long) */
292 FALSE, /* pc_relative */
294 complain_overflow_bitfield,/* complain_on_overflow */
295 bfd_elf_generic_reloc, /* special_function */
296 "R_LM32_8", /* name */
297 FALSE, /* partial_inplace */
300 FALSE), /* pcrel_offset */
302 /* A 16 bit absolute relocation. */
303 HOWTO (R_LM32_16, /* type */
305 1, /* size (0 = byte, 1 = short, 2 = long) */
307 FALSE, /* pc_relative */
309 complain_overflow_bitfield,/* complain_on_overflow */
310 bfd_elf_generic_reloc, /* special_function */
311 "R_LM32_16", /* name */
312 FALSE, /* partial_inplace */
314 0xffff, /* dst_mask */
315 FALSE), /* pcrel_offset */
317 /* A 32 bit absolute relocation. */
318 HOWTO (R_LM32_32, /* type */
320 2, /* size (0 = byte, 1 = short, 2 = long) */
322 FALSE, /* pc_relative */
324 complain_overflow_bitfield,/* complain_on_overflow */
325 bfd_elf_generic_reloc, /* special_function */
326 "R_LM32_32", /* name */
327 FALSE, /* partial_inplace */
329 0xffffffff, /* dst_mask */
330 FALSE), /* pcrel_offset */
332 HOWTO (R_LM32_HI16, /* type */
334 2, /* size (0 = byte, 1 = short, 2 = long) */
336 FALSE, /* pc_relative */
338 complain_overflow_bitfield,/* complain_on_overflow */
339 bfd_elf_generic_reloc, /* special_function */
340 "R_LM32_HI16", /* name */
341 FALSE, /* partial_inplace */
343 0xffff, /* dst_mask */
344 FALSE), /* pcrel_offset */
346 HOWTO (R_LM32_LO16, /* type */
348 2, /* size (0 = byte, 1 = short, 2 = long) */
350 FALSE, /* pc_relative */
352 complain_overflow_dont, /* complain_on_overflow */
353 bfd_elf_generic_reloc, /* special_function */
354 "R_LM32_LO16", /* name */
355 FALSE, /* partial_inplace */
357 0xffff, /* dst_mask */
358 FALSE), /* pcrel_offset */
360 HOWTO (R_LM32_GPREL16, /* type */
362 2, /* size (0 = byte, 1 = short, 2 = long) */
364 FALSE, /* pc_relative */
366 complain_overflow_dont, /* complain_on_overflow */
367 lm32_elf_gprel_reloc, /* special_function */
368 "R_LM32_GPREL16", /* name */
369 FALSE, /* partial_inplace */
371 0xffff, /* dst_mask */
372 FALSE), /* pcrel_offset */
374 HOWTO (R_LM32_CALL, /* type */
376 2, /* size (0 = byte, 1 = short, 2 = long) */
378 TRUE, /* pc_relative */
380 complain_overflow_signed, /* complain_on_overflow */
381 bfd_elf_generic_reloc, /* special_function */
382 "R_LM32_CALL", /* name */
383 FALSE, /* partial_inplace */
385 0x3ffffff, /* dst_mask */
386 TRUE), /* pcrel_offset */
388 HOWTO (R_LM32_BRANCH, /* type */
390 2, /* size (0 = byte, 1 = short, 2 = long) */
392 TRUE, /* pc_relative */
394 complain_overflow_signed, /* complain_on_overflow */
395 bfd_elf_generic_reloc, /* special_function */
396 "R_LM32_BRANCH", /* name */
397 FALSE, /* partial_inplace */
399 0xffff, /* dst_mask */
400 TRUE), /* pcrel_offset */
402 /* GNU extension to record C++ vtable hierarchy. */
403 HOWTO (R_LM32_GNU_VTINHERIT, /* type */
405 2, /* size (0 = byte, 1 = short, 2 = long) */
407 FALSE, /* pc_relative */
409 complain_overflow_dont, /* complain_on_overflow */
410 NULL, /* special_function */
411 "R_LM32_GNU_VTINHERIT", /* name */
412 FALSE, /* partial_inplace */
415 FALSE), /* pcrel_offset */
417 /* GNU extension to record C++ vtable member usage. */
418 HOWTO (R_LM32_GNU_VTENTRY, /* type */
420 2, /* size (0 = byte, 1 = short, 2 = long) */
422 FALSE, /* pc_relative */
424 complain_overflow_dont, /* complain_on_overflow */
425 _bfd_elf_rel_vtable_reloc_fn,/* special_function */
426 "R_LM32_GNU_VTENTRY", /* name */
427 FALSE, /* partial_inplace */
430 FALSE), /* pcrel_offset */
432 HOWTO (R_LM32_16_GOT, /* type */
434 2, /* size (0 = byte, 1 = short, 2 = long) */
436 FALSE, /* pc_relative */
438 complain_overflow_signed, /* complain_on_overflow */
439 bfd_elf_generic_reloc, /* special_function */
440 "R_LM32_16_GOT", /* name */
441 FALSE, /* partial_inplace */
443 0xffff, /* dst_mask */
444 FALSE), /* pcrel_offset */
446 HOWTO (R_LM32_GOTOFF_HI16, /* type */
448 2, /* size (0 = byte, 1 = short, 2 = long) */
450 FALSE, /* pc_relative */
452 complain_overflow_dont, /* complain_on_overflow */
453 bfd_elf_generic_reloc, /* special_function */
454 "R_LM32_GOTOFF_HI16", /* name */
455 FALSE, /* partial_inplace */
456 0xffff, /* src_mask */
457 0xffff, /* dst_mask */
458 FALSE), /* pcrel_offset */
460 HOWTO (R_LM32_GOTOFF_LO16, /* type */
462 2, /* size (0 = byte, 1 = short, 2 = long) */
464 FALSE, /* pc_relative */
466 complain_overflow_dont, /* complain_on_overflow */
467 bfd_elf_generic_reloc, /* special_function */
468 "R_LM32_GOTOFF_LO16", /* name */
469 FALSE, /* partial_inplace */
470 0xffff, /* src_mask */
471 0xffff, /* dst_mask */
472 FALSE), /* pcrel_offset */
474 HOWTO (R_LM32_COPY, /* type */
476 2, /* size (0 = byte, 1 = short, 2 = long) */
478 FALSE, /* pc_relative */
480 complain_overflow_bitfield, /* complain_on_overflow */
481 bfd_elf_generic_reloc, /* special_function */
482 "R_LM32_COPY", /* name */
483 FALSE, /* partial_inplace */
484 0xffffffff, /* src_mask */
485 0xffffffff, /* dst_mask */
486 FALSE), /* pcrel_offset */
488 HOWTO (R_LM32_GLOB_DAT, /* type */
490 2, /* size (0 = byte, 1 = short, 2 = long) */
492 FALSE, /* pc_relative */
494 complain_overflow_bitfield, /* complain_on_overflow */
495 bfd_elf_generic_reloc, /* special_function */
496 "R_LM32_GLOB_DAT", /* name */
497 FALSE, /* partial_inplace */
498 0xffffffff, /* src_mask */
499 0xffffffff, /* dst_mask */
500 FALSE), /* pcrel_offset */
502 HOWTO (R_LM32_JMP_SLOT, /* type */
504 2, /* size (0 = byte, 1 = short, 2 = long) */
506 FALSE, /* pc_relative */
508 complain_overflow_bitfield, /* complain_on_overflow */
509 bfd_elf_generic_reloc, /* special_function */
510 "R_LM32_JMP_SLOT", /* name */
511 FALSE, /* partial_inplace */
512 0xffffffff, /* src_mask */
513 0xffffffff, /* dst_mask */
514 FALSE), /* pcrel_offset */
516 HOWTO (R_LM32_RELATIVE, /* type */
518 2, /* size (0 = byte, 1 = short, 2 = long) */
520 FALSE, /* pc_relative */
522 complain_overflow_bitfield, /* complain_on_overflow */
523 bfd_elf_generic_reloc, /* special_function */
524 "R_LM32_RELATIVE", /* name */
525 FALSE, /* partial_inplace */
526 0xffffffff, /* src_mask */
527 0xffffffff, /* dst_mask */
528 FALSE), /* pcrel_offset */
532 /* Map BFD reloc types to lm32 ELF reloc types. */
534 struct lm32_reloc_map
536 bfd_reloc_code_real_type bfd_reloc_val;
537 unsigned char elf_reloc_val;
540 static const struct lm32_reloc_map lm32_reloc_map[] =
542 { BFD_RELOC_NONE, R_LM32_NONE },
543 { BFD_RELOC_8, R_LM32_8 },
544 { BFD_RELOC_16, R_LM32_16 },
545 { BFD_RELOC_32, R_LM32_32 },
546 { BFD_RELOC_HI16, R_LM32_HI16 },
547 { BFD_RELOC_LO16, R_LM32_LO16 },
548 { BFD_RELOC_GPREL16, R_LM32_GPREL16 },
549 { BFD_RELOC_LM32_CALL, R_LM32_CALL },
550 { BFD_RELOC_LM32_BRANCH, R_LM32_BRANCH },
551 { BFD_RELOC_VTABLE_INHERIT, R_LM32_GNU_VTINHERIT },
552 { BFD_RELOC_VTABLE_ENTRY, R_LM32_GNU_VTENTRY },
553 { BFD_RELOC_LM32_16_GOT, R_LM32_16_GOT },
554 { BFD_RELOC_LM32_GOTOFF_HI16, R_LM32_GOTOFF_HI16 },
555 { BFD_RELOC_LM32_GOTOFF_LO16, R_LM32_GOTOFF_LO16 },
556 { BFD_RELOC_LM32_COPY, R_LM32_COPY },
557 { BFD_RELOC_LM32_GLOB_DAT, R_LM32_GLOB_DAT },
558 { BFD_RELOC_LM32_JMP_SLOT, R_LM32_JMP_SLOT },
559 { BFD_RELOC_LM32_RELATIVE, R_LM32_RELATIVE },
562 static reloc_howto_type *
563 lm32_reloc_type_lookup (bfd *abfd ATTRIBUTE_UNUSED,
564 bfd_reloc_code_real_type code)
568 for (i = 0; i < sizeof (lm32_reloc_map) / sizeof (lm32_reloc_map[0]); i++)
569 if (lm32_reloc_map[i].bfd_reloc_val == code)
570 return &lm32_elf_howto_table[lm32_reloc_map[i].elf_reloc_val];
574 static reloc_howto_type *
575 lm32_reloc_name_lookup (bfd *abfd ATTRIBUTE_UNUSED,
581 i < sizeof (lm32_elf_howto_table) / sizeof (lm32_elf_howto_table[0]);
583 if (lm32_elf_howto_table[i].name != NULL
584 && strcasecmp (lm32_elf_howto_table[i].name, r_name) == 0)
585 return &lm32_elf_howto_table[i];
591 /* Set the howto pointer for an Lattice Mico32 ELF reloc. */
594 lm32_info_to_howto_rela (bfd *abfd ATTRIBUTE_UNUSED,
596 Elf_Internal_Rela *dst)
600 r_type = ELF32_R_TYPE (dst->r_info);
601 BFD_ASSERT (r_type < (unsigned int) R_LM32_max);
602 cache_ptr->howto = &lm32_elf_howto_table[r_type];
605 /* Set the right machine number for an Lattice Mico32 ELF file. */
608 lm32_elf_object_p (bfd *abfd)
610 return bfd_default_set_arch_mach (abfd, bfd_arch_lm32, bfd_mach_lm32);
613 /* Set machine type flags just before file is written out. */
616 lm32_elf_final_write_processing (bfd *abfd, bfd_boolean linker ATTRIBUTE_UNUSED)
618 elf_elfheader (abfd)->e_machine = EM_LATTICEMICO32;
619 elf_elfheader (abfd)->e_flags &=~ EF_LM32_MACH;
620 switch (bfd_get_mach (abfd))
623 elf_elfheader (abfd)->e_flags |= E_LM32_MACH;
630 /* Set the GP value for OUTPUT_BFD. Returns FALSE if this is a
631 dangerous relocation. */
634 lm32_elf_assign_gp (bfd *output_bfd, bfd_vma *pgp)
640 /* If we've already figured out what GP will be, just return it. */
641 *pgp = _bfd_get_gp_value (output_bfd);
645 count = bfd_get_symcount (output_bfd);
646 sym = bfd_get_outsymbols (output_bfd);
648 /* The linker script will have created a symbol named `_gp' with the
649 appropriate value. */
654 for (i = 0; i < count; i++, sym++)
658 name = bfd_asymbol_name (*sym);
659 if (*name == '_' && strcmp (name, "_gp") == 0)
661 *pgp = bfd_asymbol_value (*sym);
662 _bfd_set_gp_value (output_bfd, *pgp);
670 /* Only get the error once. */
672 _bfd_set_gp_value (output_bfd, *pgp);
679 /* We have to figure out the gp value, so that we can adjust the
680 symbol value correctly. We look up the symbol _gp in the output
681 BFD. If we can't find it, we're stuck. We cache it in the ELF
682 target data. We don't need to adjust the symbol value for an
683 external symbol if we are producing relocatable output. */
685 static bfd_reloc_status_type
686 lm32_elf_final_gp (bfd *output_bfd, asymbol *symbol, bfd_boolean relocatable,
687 char **error_message, bfd_vma *pgp)
689 if (bfd_is_und_section (symbol->section) && !relocatable)
692 return bfd_reloc_undefined;
695 *pgp = _bfd_get_gp_value (output_bfd);
696 if (*pgp == 0 && (!relocatable || (symbol->flags & BSF_SECTION_SYM) != 0))
700 /* Make up a value. */
701 *pgp = symbol->section->output_section->vma + 0x4000;
702 _bfd_set_gp_value (output_bfd, *pgp);
704 else if (!lm32_elf_assign_gp (output_bfd, pgp))
708 _("global pointer relative relocation when _gp not defined");
709 return bfd_reloc_dangerous;
716 static bfd_reloc_status_type
717 lm32_elf_do_gprel_relocate (bfd *abfd,
718 reloc_howto_type *howto,
719 asection *input_section ATTRIBUTE_UNUSED,
722 bfd_vma symbol_value,
725 return _bfd_final_link_relocate (howto, abfd, input_section,
726 data, offset, symbol_value, addend);
729 static bfd_reloc_status_type
730 lm32_elf_gprel_reloc (bfd *abfd,
731 arelent *reloc_entry,
734 asection *input_section,
740 bfd_reloc_status_type r;
742 if (output_bfd != (bfd *) NULL
743 && (symbol->flags & BSF_SECTION_SYM) == 0
744 && (!reloc_entry->howto->partial_inplace || reloc_entry->addend == 0))
746 reloc_entry->address += input_section->output_offset;
750 if (output_bfd != NULL)
753 relocation = symbol->value
754 + symbol->section->output_section->vma + symbol->section->output_offset;
757 lm32_elf_final_gp (abfd, symbol, FALSE, msg, &gp)) == bfd_reloc_ok)
759 relocation = relocation + reloc_entry->addend - gp;
760 reloc_entry->addend = 0;
761 if ((signed) relocation < -32768 || (signed) relocation > 32767)
763 *msg = _("global pointer relative address out of range");
764 r = bfd_reloc_outofrange;
768 r = lm32_elf_do_gprel_relocate (abfd, reloc_entry->howto,
770 data, reloc_entry->address,
771 relocation, reloc_entry->addend);
778 /* Find the segment number in which OSEC, and output section, is
782 _lm32fdpic_osec_to_segment (bfd *output_bfd, asection *osec)
784 struct elf_segment_map *m;
785 Elf_Internal_Phdr *p;
787 /* Find the segment that contains the output_section. */
788 for (m = elf_tdata (output_bfd)->segment_map,
789 p = elf_tdata (output_bfd)->phdr;
795 for (i = m->count - 1; i >= 0; i--)
796 if (m->sections[i] == osec)
803 return p - elf_tdata (output_bfd)->phdr;
806 /* Determine if an output section is read-only. */
808 inline static bfd_boolean
809 _lm32fdpic_osec_readonly_p (bfd *output_bfd, asection *osec)
811 unsigned seg = _lm32fdpic_osec_to_segment (output_bfd, osec);
813 return ! (elf_tdata (output_bfd)->phdr[seg].p_flags & PF_W);
816 /* Relocate a section */
819 lm32_elf_relocate_section (bfd *output_bfd,
820 struct bfd_link_info *info,
822 asection *input_section,
824 Elf_Internal_Rela *relocs,
825 Elf_Internal_Sym *local_syms,
826 asection **local_sections)
828 Elf_Internal_Shdr *symtab_hdr = &elf_tdata (input_bfd)->symtab_hdr;
829 struct elf_link_hash_entry **sym_hashes = elf_sym_hashes (input_bfd);
830 Elf_Internal_Rela *rel, *relend;
832 struct elf_lm32_link_hash_table *htab = lm32_elf_hash_table (info);
834 bfd_vma *local_got_offsets;
835 asection *sgot, *splt, *sreloc;
837 dynobj = htab->root.dynobj;
838 local_got_offsets = elf_local_got_offsets (input_bfd);
844 symtab_hdr = &elf_tdata (input_bfd)->symtab_hdr;
845 sym_hashes = elf_sym_hashes (input_bfd);
848 relend = relocs + input_section->reloc_count;
849 for (; rel < relend; rel++)
851 reloc_howto_type *howto;
853 unsigned long r_symndx;
854 Elf_Internal_Sym *sym;
856 struct elf_link_hash_entry *h;
859 bfd_reloc_status_type r;
860 const char *name = NULL;
863 r_symndx = ELF32_R_SYM (rel->r_info);
864 r_type = ELF32_R_TYPE (rel->r_info);
866 if (r_type == R_LM32_GNU_VTENTRY
867 || r_type == R_LM32_GNU_VTINHERIT )
874 howto = lm32_elf_howto_table + r_type;
876 if (r_symndx < symtab_hdr->sh_info)
878 /* It's a local symbol. */
879 sym = local_syms + r_symndx;
880 osec = sec = local_sections[r_symndx];
881 relocation = _bfd_elf_rela_local_sym (output_bfd, sym, &sec, rel);
882 name = bfd_elf_string_from_elf_section
883 (input_bfd, symtab_hdr->sh_link, sym->st_name);
884 name = (name == NULL) ? bfd_section_name (input_bfd, sec) : name;
888 /* It's a global symbol. */
889 bfd_boolean unresolved_reloc;
892 RELOC_FOR_GLOBAL_SYMBOL (info, input_bfd, input_section, rel,
893 r_symndx, symtab_hdr, sym_hashes,
895 unresolved_reloc, warned);
897 name = h->root.root.string;
900 if (sec != NULL && elf_discarded_section (sec))
902 /* For relocs against symbols from removed linkonce sections,
903 or sections discarded by a linker script, we just want the
904 section contents zeroed. Avoid any special processing. */
905 _bfd_clear_contents (howto, input_bfd, contents + rel->r_offset);
911 if (info->relocatable)
913 /* This is a relocatable link. We don't have to change
914 anything, unless the reloc is against a section symbol,
915 in which case we have to adjust according to where the
916 section symbol winds up in the output section. */
917 if (sym == NULL || ELF_ST_TYPE (sym->st_info) != STT_SECTION)
920 /* If partial_inplace, we need to store any additional addend
921 back in the section. */
922 if (! howto->partial_inplace)
925 /* Shouldn't reach here. */
934 if (!lm32_elf_assign_gp (output_bfd, &gp))
935 r = bfd_reloc_dangerous;
938 relocation = relocation + rel->r_addend - gp;
940 if ((signed)relocation < -32768 || (signed)relocation > 32767)
941 r = bfd_reloc_outofrange;
944 r = _bfd_final_link_relocate (howto, input_bfd,
945 input_section, contents,
946 rel->r_offset, relocation,
952 /* Relocation is to the entry for this symbol in the global
954 BFD_ASSERT (sgot != NULL);
961 BFD_ASSERT (off != (bfd_vma) -1);
963 dyn = htab->root.dynamic_sections_created;
964 if (! WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, info->shared, h)
971 /* This is actually a static link, or it is a
972 -Bsymbolic link and the symbol is defined
973 locally, or the symbol was forced to be local
974 because of a version file. We must initialize
975 this entry in the global offset table. Since the
976 offset must always be a multiple of 4, we use the
977 least significant bit to record whether we have
978 initialized it already.
980 When doing a dynamic link, we create a .rela.got
981 relocation entry to initialize the value. This
982 is done in the finish_dynamic_symbol routine. */
987 /* Write entry in GOT */
988 bfd_put_32 (output_bfd, relocation,
989 sgot->contents + off);
990 /* Create entry in .rofixup pointing to GOT entry. */
991 if (IS_FDPIC (output_bfd) && h->root.type != bfd_link_hash_undefweak)
993 _lm32fdpic_add_rofixup (output_bfd,
994 lm32fdpic_fixup32_section
996 sgot->output_section->vma
997 + sgot->output_offset
1000 /* Mark GOT entry as having been written. */
1005 relocation = sgot->output_offset + off;
1012 BFD_ASSERT (local_got_offsets != NULL
1013 && local_got_offsets[r_symndx] != (bfd_vma) -1);
1015 /* Get offset into GOT table. */
1016 off = local_got_offsets[r_symndx];
1018 /* The offset must always be a multiple of 4. We use
1019 the least significant bit to record whether we have
1020 already processed this entry. */
1025 /* Write entry in GOT. */
1026 bfd_put_32 (output_bfd, relocation, sgot->contents + off);
1027 /* Create entry in .rofixup pointing to GOT entry. */
1028 if (IS_FDPIC (output_bfd))
1030 _lm32fdpic_add_rofixup (output_bfd,
1031 lm32fdpic_fixup32_section
1033 sgot->output_section->vma
1034 + sgot->output_offset
1041 Elf_Internal_Rela outrel;
1043 /* We need to generate a R_LM32_RELATIVE reloc
1044 for the dynamic linker. */
1045 srelgot = bfd_get_section_by_name (dynobj, ".rela.got");
1046 BFD_ASSERT (srelgot != NULL);
1048 outrel.r_offset = (sgot->output_section->vma
1049 + sgot->output_offset
1051 outrel.r_info = ELF32_R_INFO (0, R_LM32_RELATIVE);
1052 outrel.r_addend = relocation;
1053 loc = srelgot->contents;
1054 loc += srelgot->reloc_count * sizeof (Elf32_External_Rela);
1055 bfd_elf32_swap_reloca_out (output_bfd, &outrel,loc);
1056 ++srelgot->reloc_count;
1059 local_got_offsets[r_symndx] |= 1;
1063 relocation = sgot->output_offset + off;
1066 /* Addend should be zero. */
1067 if (rel->r_addend != 0)
1068 (*_bfd_error_handler) (_("internal error: addend should be zero for R_LM32_16_GOT"));
1070 r = _bfd_final_link_relocate (howto,
1079 case R_LM32_GOTOFF_LO16:
1080 case R_LM32_GOTOFF_HI16:
1081 /* Relocation is offset from GOT. */
1082 BFD_ASSERT (sgot != NULL);
1083 relocation -= sgot->output_section->vma;
1084 /* Account for sign-extension. */
1085 if ((r_type == R_LM32_GOTOFF_HI16)
1086 && ((relocation + rel->r_addend) & 0x8000))
1087 rel->r_addend += 0x10000;
1088 r = _bfd_final_link_relocate (howto,
1098 if (IS_FDPIC (output_bfd))
1100 if ((!h) || (h && h->root.type != bfd_link_hash_undefweak))
1102 /* Only create .rofixup entries for relocs in loadable sections. */
1103 if ((bfd_get_section_flags (output_bfd, input_section->output_section)
1104 & (SEC_ALLOC | SEC_LOAD)) == (SEC_ALLOC | SEC_LOAD))
1107 /* Check address to be modified is writable. */
1108 if (_lm32fdpic_osec_readonly_p (output_bfd,
1112 info->callbacks->warning
1114 _("cannot emit dynamic relocations in read-only section"),
1115 name, input_bfd, input_section, rel->r_offset);
1118 /* Create entry in .rofixup section. */
1119 _lm32fdpic_add_rofixup (output_bfd,
1120 lm32fdpic_fixup32_section (info),
1121 input_section->output_section->vma
1122 + input_section->output_offset
1130 r = _bfd_final_link_relocate (howto,
1141 if (r != bfd_reloc_ok)
1144 const char *msg = NULL;
1146 reloc_howto_type *howto;
1148 lm32_info_to_howto_rela (input_bfd, &bfd_reloc, rel);
1149 howto = bfd_reloc.howto;
1152 name = h->root.root.string;
1155 name = (bfd_elf_string_from_elf_section
1156 (input_bfd, symtab_hdr->sh_link, sym->st_name));
1157 if (name == NULL || *name == '\0')
1158 name = bfd_section_name (input_bfd, sec);
1163 case bfd_reloc_overflow:
1165 && (h->root.type == bfd_link_hash_undefweak))
1167 if (! ((*info->callbacks->reloc_overflow)
1168 (info, (h ? &h->root : NULL), name, howto->name,
1169 (bfd_vma) 0, input_bfd, input_section, rel->r_offset)))
1173 case bfd_reloc_undefined:
1174 if (! ((*info->callbacks->undefined_symbol)
1175 (info, name, input_bfd, input_section,
1176 rel->r_offset, TRUE)))
1180 case bfd_reloc_outofrange:
1181 msg = _("internal error: out of range error");
1184 case bfd_reloc_notsupported:
1185 msg = _("internal error: unsupported relocation error");
1188 case bfd_reloc_dangerous:
1189 msg = _("internal error: dangerous error");
1193 msg = _("internal error: unknown error");
1197 if (!((*info->callbacks->warning)
1198 (info, msg, name, input_bfd, input_section,
1210 lm32_elf_gc_mark_hook (asection *sec,
1211 struct bfd_link_info *info,
1212 Elf_Internal_Rela *rel,
1213 struct elf_link_hash_entry *h,
1214 Elf_Internal_Sym *sym)
1217 switch (ELF32_R_TYPE (rel->r_info))
1219 case R_LM32_GNU_VTINHERIT:
1220 case R_LM32_GNU_VTENTRY:
1224 return _bfd_elf_gc_mark_hook (sec, info, rel, h, sym);
1228 lm32_elf_gc_sweep_hook (bfd *abfd,
1229 struct bfd_link_info *info ATTRIBUTE_UNUSED,
1231 const Elf_Internal_Rela *relocs ATTRIBUTE_UNUSED)
1233 /* Update the got entry reference counts for the section being removed. */
1234 Elf_Internal_Shdr *symtab_hdr;
1235 struct elf_link_hash_entry **sym_hashes;
1236 bfd_signed_vma *local_got_refcounts;
1237 const Elf_Internal_Rela *rel, *relend;
1239 elf_section_data (sec)->local_dynrel = NULL;
1241 symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
1242 sym_hashes = elf_sym_hashes (abfd);
1243 local_got_refcounts = elf_local_got_refcounts (abfd);
1245 relend = relocs + sec->reloc_count;
1246 for (rel = relocs; rel < relend; rel++)
1248 unsigned long r_symndx;
1249 struct elf_link_hash_entry *h = NULL;
1251 r_symndx = ELF32_R_SYM (rel->r_info);
1252 if (r_symndx >= symtab_hdr->sh_info)
1254 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
1255 while (h->root.type == bfd_link_hash_indirect
1256 || h->root.type == bfd_link_hash_warning)
1257 h = (struct elf_link_hash_entry *) h->root.u.i.link;
1260 switch (ELF32_R_TYPE (rel->r_info))
1265 if (h->got.refcount > 0)
1270 if (local_got_refcounts && local_got_refcounts[r_symndx] > 0)
1271 local_got_refcounts[r_symndx]--;
1282 /* Look through the relocs for a section during the first phase. */
1285 lm32_elf_check_relocs (bfd *abfd,
1286 struct bfd_link_info *info,
1288 const Elf_Internal_Rela *relocs)
1290 Elf_Internal_Shdr *symtab_hdr;
1291 struct elf_link_hash_entry **sym_hashes, **sym_hashes_end;
1292 const Elf_Internal_Rela *rel;
1293 const Elf_Internal_Rela *rel_end;
1294 struct elf_lm32_link_hash_table *htab;
1296 bfd_vma *local_got_offsets;
1297 asection *sgot, *srelgot, *sreloc;
1299 if (info->relocatable)
1302 sgot = srelgot = sreloc = NULL;
1304 symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
1305 sym_hashes = elf_sym_hashes (abfd);
1306 sym_hashes_end = sym_hashes + symtab_hdr->sh_size/sizeof (Elf32_External_Sym);
1307 if (!elf_bad_symtab (abfd))
1308 sym_hashes_end -= symtab_hdr->sh_info;
1310 htab = lm32_elf_hash_table (info);
1311 dynobj = htab->root.dynobj;
1312 local_got_offsets = elf_local_got_offsets (abfd);
1314 rel_end = relocs + sec->reloc_count;
1315 for (rel = relocs; rel < rel_end; rel++)
1318 struct elf_link_hash_entry *h;
1319 unsigned long r_symndx;
1321 r_symndx = ELF32_R_SYM (rel->r_info);
1322 r_type = ELF32_R_TYPE (rel->r_info);
1323 if (r_symndx < symtab_hdr->sh_info)
1327 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
1328 while (h->root.type == bfd_link_hash_indirect
1329 || h->root.type == bfd_link_hash_warning)
1330 h = (struct elf_link_hash_entry *) h->root.u.i.link;
1333 /* Some relocs require a global offset table. */
1334 if (htab->sgot == NULL)
1339 case R_LM32_GOTOFF_HI16:
1340 case R_LM32_GOTOFF_LO16:
1342 htab->root.dynobj = dynobj = abfd;
1343 if (! create_got_section (dynobj, info))
1349 /* Some relocs require a rofixup table. */
1350 if (IS_FDPIC (abfd))
1355 /* FDPIC requires a GOT if there is a .rofixup section
1356 (Normal ELF doesn't). */
1358 htab->root.dynobj = dynobj = abfd;
1359 if (! create_got_section (dynobj, info))
1361 /* Create .rofixup section */
1362 if (htab->sfixup32 == NULL)
1364 if (! create_rofixup_section (abfd, info))
1369 case R_LM32_GOTOFF_HI16:
1370 case R_LM32_GOTOFF_LO16:
1371 /* Create .rofixup section. */
1372 if (htab->sfixup32 == NULL)
1374 if (! create_rofixup_section (abfd, info))
1385 h->got.refcount += 1;
1388 bfd_signed_vma *local_got_refcounts;
1390 /* This is a global offset table entry for a local symbol. */
1391 local_got_refcounts = elf_local_got_refcounts (abfd);
1392 if (local_got_refcounts == NULL)
1396 size = symtab_hdr->sh_info;
1397 size *= sizeof (bfd_signed_vma);
1398 local_got_refcounts = bfd_zalloc (abfd, size);
1399 if (local_got_refcounts == NULL)
1401 elf_local_got_refcounts (abfd) = local_got_refcounts;
1403 local_got_refcounts[r_symndx] += 1;
1407 /* This relocation describes the C++ object vtable hierarchy.
1408 Reconstruct it for later use during GC. */
1409 case R_LM32_GNU_VTINHERIT:
1410 if (!bfd_elf_gc_record_vtinherit (abfd, sec, h, rel->r_offset))
1414 /* This relocation describes which C++ vtable entries are actually
1415 used. Record for later use during GC. */
1416 case R_LM32_GNU_VTENTRY:
1417 if (!bfd_elf_gc_record_vtentry (abfd, sec, h, rel->r_addend))
1427 /* Finish up the dynamic sections. */
1430 lm32_elf_finish_dynamic_sections (bfd *output_bfd,
1431 struct bfd_link_info *info)
1433 struct elf_lm32_link_hash_table *htab;
1438 htab = lm32_elf_hash_table (info);
1439 dynobj = htab->root.dynobj;
1441 sgot = htab->sgotplt;
1442 sdyn = bfd_get_section_by_name (dynobj, ".dynamic");
1444 if (htab->root.dynamic_sections_created)
1447 Elf32_External_Dyn *dyncon, *dynconend;
1449 BFD_ASSERT (sgot != NULL && sdyn != NULL);
1451 dyncon = (Elf32_External_Dyn *) sdyn->contents;
1452 dynconend = (Elf32_External_Dyn *) (sdyn->contents + sdyn->size);
1454 for (; dyncon < dynconend; dyncon++)
1456 Elf_Internal_Dyn dyn;
1460 bfd_elf32_swap_dyn_in (dynobj, dyncon, &dyn);
1469 s = htab->sgot->output_section;
1473 s = htab->srelplt->output_section;
1475 BFD_ASSERT (s != NULL);
1476 dyn.d_un.d_ptr = s->vma;
1477 bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon);
1481 s = htab->srelplt->output_section;
1482 BFD_ASSERT (s != NULL);
1483 dyn.d_un.d_val = s->size;
1484 bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon);
1488 /* My reading of the SVR4 ABI indicates that the
1489 procedure linkage table relocs (DT_JMPREL) should be
1490 included in the overall relocs (DT_RELA). This is
1491 what Solaris does. However, UnixWare can not handle
1492 that case. Therefore, we override the DT_RELASZ entry
1493 here to make it not include the JMPREL relocs. Since
1494 the linker script arranges for .rela.plt to follow all
1495 other relocation sections, we don't have to worry
1496 about changing the DT_RELA entry. */
1497 if (htab->srelplt != NULL)
1499 s = htab->srelplt->output_section;
1500 dyn.d_un.d_val -= s->size;
1502 bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon);
1507 /* Fill in the first entry in the procedure linkage table. */
1509 if (splt && splt->size > 0)
1513 bfd_put_32 (output_bfd, PLT0_PIC_ENTRY_WORD0, splt->contents);
1514 bfd_put_32 (output_bfd, PLT0_PIC_ENTRY_WORD1, splt->contents + 4);
1515 bfd_put_32 (output_bfd, PLT0_PIC_ENTRY_WORD2, splt->contents + 8);
1516 bfd_put_32 (output_bfd, PLT0_PIC_ENTRY_WORD3, splt->contents + 12);
1517 bfd_put_32 (output_bfd, PLT0_PIC_ENTRY_WORD4, splt->contents + 16);
1522 /* addr = .got + 4 */
1523 addr = sgot->output_section->vma + sgot->output_offset + 4;
1524 bfd_put_32 (output_bfd,
1525 PLT0_ENTRY_WORD0 | ((addr >> 16) & 0xffff),
1527 bfd_put_32 (output_bfd,
1528 PLT0_ENTRY_WORD1 | (addr & 0xffff),
1529 splt->contents + 4);
1530 bfd_put_32 (output_bfd, PLT0_ENTRY_WORD2, splt->contents + 8);
1531 bfd_put_32 (output_bfd, PLT0_ENTRY_WORD3, splt->contents + 12);
1532 bfd_put_32 (output_bfd, PLT0_ENTRY_WORD4, splt->contents + 16);
1535 elf_section_data (splt->output_section)->this_hdr.sh_entsize =
1540 /* Fill in the first three entries in the global offset table. */
1541 if (sgot && sgot->size > 0)
1544 bfd_put_32 (output_bfd, (bfd_vma) 0, sgot->contents);
1546 bfd_put_32 (output_bfd,
1547 sdyn->output_section->vma + sdyn->output_offset,
1549 bfd_put_32 (output_bfd, (bfd_vma) 0, sgot->contents + 4);
1550 bfd_put_32 (output_bfd, (bfd_vma) 0, sgot->contents + 8);
1552 /* FIXME: This can be null if create_dynamic_sections wasn't called. */
1553 if (elf_section_data (sgot->output_section) != NULL)
1554 elf_section_data (sgot->output_section)->this_hdr.sh_entsize = 4;
1557 if (lm32fdpic_fixup32_section (info))
1559 struct elf_link_hash_entry *hgot = elf_hash_table (info)->hgot;
1560 bfd_vma got_value = hgot->root.u.def.value
1561 + hgot->root.u.def.section->output_section->vma
1562 + hgot->root.u.def.section->output_offset;
1563 struct bfd_link_hash_entry *hend;
1565 /* Last entry is pointer to GOT. */
1566 _lm32fdpic_add_rofixup (output_bfd, lm32fdpic_fixup32_section (info), got_value);
1568 /* Check we wrote enough entries. */
1569 if (lm32fdpic_fixup32_section (info)->size
1570 != (lm32fdpic_fixup32_section (info)->reloc_count * 4))
1572 (*_bfd_error_handler)
1573 ("LINKER BUG: .rofixup section size mismatch: size/4 %d != relocs %d",
1574 lm32fdpic_fixup32_section (info)->size/4,
1575 lm32fdpic_fixup32_section (info)->reloc_count);
1579 hend = bfd_link_hash_lookup (info->hash, "__ROFIXUP_END__",
1580 FALSE, FALSE, TRUE);
1582 && (hend->type == bfd_link_hash_defined
1583 || hend->type == bfd_link_hash_defweak))
1586 lm32fdpic_fixup32_section (info)->output_section->vma
1587 + lm32fdpic_fixup32_section (info)->output_offset
1588 + lm32fdpic_fixup32_section (info)->size
1589 - hend->u.def.section->output_section->vma
1590 - hend->u.def.section->output_offset;
1591 BFD_ASSERT (hend->u.def.value == value);
1592 if (hend->u.def.value != value)
1594 (*_bfd_error_handler)
1595 ("LINKER BUG: .rofixup section hend->u.def.value != value: %ld != %ld", hend->u.def.value, value);
1604 /* Finish up dynamic symbol handling. We set the contents of various
1605 dynamic sections here. */
1608 lm32_elf_finish_dynamic_symbol (bfd *output_bfd,
1609 struct bfd_link_info *info,
1610 struct elf_link_hash_entry *h,
1611 Elf_Internal_Sym *sym)
1613 struct elf_lm32_link_hash_table *htab;
1617 htab = lm32_elf_hash_table (info);
1618 dynobj = htab->root.dynobj;
1620 if (h->plt.offset != (bfd_vma) -1)
1628 Elf_Internal_Rela rela;
1630 /* This symbol has an entry in the procedure linkage table. Set
1632 BFD_ASSERT (h->dynindx != -1);
1635 sgot = htab->sgotplt;
1636 srela = htab->srelplt;
1637 BFD_ASSERT (splt != NULL && sgot != NULL && srela != NULL);
1639 /* Get the index in the procedure linkage table which
1640 corresponds to this symbol. This is the index of this symbol
1641 in all the symbols for which we are making plt entries. The
1642 first entry in the procedure linkage table is reserved. */
1643 plt_index = h->plt.offset / PLT_ENTRY_SIZE - 1;
1645 /* Get the offset into the .got table of the entry that
1646 corresponds to this function. Each .got entry is 4 bytes.
1647 The first three are reserved. */
1648 got_offset = (plt_index + 3) * 4;
1650 /* Fill in the entry in the procedure linkage table. */
1660 /* Fill in the entry in the global offset table. */
1661 bfd_put_32 (output_bfd,
1662 (splt->output_section->vma
1663 + splt->output_offset
1665 + 12), /* same offset */
1666 sgot->contents + got_offset);
1668 /* Fill in the entry in the .rela.plt section. */
1669 rela.r_offset = (sgot->output_section->vma
1670 + sgot->output_offset
1672 rela.r_info = ELF32_R_INFO (h->dynindx, R_LM32_JMP_SLOT);
1674 loc = srela->contents;
1675 loc += plt_index * sizeof (Elf32_External_Rela);
1676 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
1678 if (!h->def_regular)
1680 /* Mark the symbol as undefined, rather than as defined in
1681 the .plt section. Leave the value alone. */
1682 sym->st_shndx = SHN_UNDEF;
1687 if (h->got.offset != (bfd_vma) -1)
1691 Elf_Internal_Rela rela;
1693 /* This symbol has an entry in the global offset table. Set it
1696 srela = htab->srelgot;
1697 BFD_ASSERT (sgot != NULL && srela != NULL);
1699 rela.r_offset = (sgot->output_section->vma
1700 + sgot->output_offset
1701 + (h->got.offset &~ 1));
1703 /* If this is a -Bsymbolic link, and the symbol is defined
1704 locally, we just want to emit a RELATIVE reloc. Likewise if
1705 the symbol was forced to be local because of a version file.
1706 The entry in the global offset table will already have been
1707 initialized in the relocate_section function. */
1714 rela.r_info = ELF32_R_INFO (0, R_LM32_RELATIVE);
1715 rela.r_addend = (h->root.u.def.value
1716 + h->root.u.def.section->output_section->vma
1717 + h->root.u.def.section->output_offset);
1721 BFD_ASSERT ((h->got.offset & 1) == 0);
1722 bfd_put_32 (output_bfd, (bfd_vma) 0, sgot->contents + h->got.offset);
1723 rela.r_info = ELF32_R_INFO (h->dynindx, R_LM32_GLOB_DAT);
1727 loc = srela->contents;
1728 loc += srela->reloc_count * sizeof (Elf32_External_Rela);
1729 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
1730 ++srela->reloc_count;
1736 Elf_Internal_Rela rela;
1738 /* This symbols needs a copy reloc. Set it up. */
1739 BFD_ASSERT (h->dynindx != -1
1740 && (h->root.type == bfd_link_hash_defined
1741 || h->root.type == bfd_link_hash_defweak));
1743 s = bfd_get_section_by_name (h->root.u.def.section->owner,
1745 BFD_ASSERT (s != NULL);
1747 rela.r_offset = (h->root.u.def.value
1748 + h->root.u.def.section->output_section->vma
1749 + h->root.u.def.section->output_offset);
1750 rela.r_info = ELF32_R_INFO (h->dynindx, R_LM32_COPY);
1753 loc += s->reloc_count * sizeof (Elf32_External_Rela);
1754 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
1758 /* Mark some specially defined symbols as absolute. */
1759 if (strcmp (h->root.root.string, "_DYNAMIC") == 0
1760 || h == htab->root.hgot)
1761 sym->st_shndx = SHN_ABS;
1766 static enum elf_reloc_type_class
1767 lm32_elf_reloc_type_class (const Elf_Internal_Rela *rela)
1769 switch ((int) ELF32_R_TYPE (rela->r_info))
1771 case R_LM32_RELATIVE: return reloc_class_relative;
1772 case R_LM32_JMP_SLOT: return reloc_class_plt;
1773 case R_LM32_COPY: return reloc_class_copy;
1774 default: return reloc_class_normal;
1778 /* Adjust a symbol defined by a dynamic object and referenced by a
1779 regular object. The current definition is in some section of the
1780 dynamic object, but we're not including those sections. We have to
1781 change the definition to something the rest of the link can
1785 lm32_elf_adjust_dynamic_symbol (struct bfd_link_info *info,
1786 struct elf_link_hash_entry *h)
1788 struct elf_lm32_link_hash_table *htab;
1789 struct elf_lm32_link_hash_entry *eh;
1790 struct elf_lm32_dyn_relocs *p;
1794 dynobj = elf_hash_table (info)->dynobj;
1796 /* Make sure we know what is going on here. */
1797 BFD_ASSERT (dynobj != NULL
1799 || h->u.weakdef != NULL
1802 && !h->def_regular)));
1804 /* If this is a function, put it in the procedure linkage table. We
1805 will fill in the contents of the procedure linkage table later,
1806 when we know the address of the .got section. */
1807 if (h->type == STT_FUNC
1813 && h->root.type != bfd_link_hash_undefweak
1814 && h->root.type != bfd_link_hash_undefined)
1816 /* This case can occur if we saw a PLT reloc in an input
1817 file, but the symbol was never referred to by a dynamic
1818 object. In such a case, we don't actually need to build
1819 a procedure linkage table, and we can just do a PCREL
1821 h->plt.offset = (bfd_vma) -1;
1828 h->plt.offset = (bfd_vma) -1;
1830 /* If this is a weak symbol, and there is a real definition, the
1831 processor independent code will have arranged for us to see the
1832 real definition first, and we can just use the same value. */
1833 if (h->u.weakdef != NULL)
1835 BFD_ASSERT (h->u.weakdef->root.type == bfd_link_hash_defined
1836 || h->u.weakdef->root.type == bfd_link_hash_defweak);
1837 h->root.u.def.section = h->u.weakdef->root.u.def.section;
1838 h->root.u.def.value = h->u.weakdef->root.u.def.value;
1842 /* This is a reference to a symbol defined by a dynamic object which
1843 is not a function. */
1845 /* If we are creating a shared library, we must presume that the
1846 only references to the symbol are via the global offset table.
1847 For such cases we need not do anything here; the relocations will
1848 be handled correctly by relocate_section. */
1852 /* If there are no references to this symbol that do not use the
1853 GOT, we don't need to generate a copy reloc. */
1854 if (!h->non_got_ref)
1857 /* If -z nocopyreloc was given, we won't generate them either. */
1858 if (info->nocopyreloc)
1864 eh = (struct elf_lm32_link_hash_entry *) h;
1865 for (p = eh->dyn_relocs; p != NULL; p = p->next)
1867 s = p->sec->output_section;
1868 if (s != NULL && (s->flags & (SEC_READONLY | SEC_HAS_CONTENTS)) != 0)
1872 /* If we didn't find any dynamic relocs in sections which needs the
1873 copy reloc, then we'll be keeping the dynamic relocs and avoiding
1883 (*_bfd_error_handler) (_("dynamic variable `%s' is zero size"),
1884 h->root.root.string);
1888 /* We must allocate the symbol in our .dynbss section, which will
1889 become part of the .bss section of the executable. There will be
1890 an entry for this symbol in the .dynsym section. The dynamic
1891 object will contain position independent code, so all references
1892 from the dynamic object to this symbol will go through the global
1893 offset table. The dynamic linker will use the .dynsym entry to
1894 determine the address it must put in the global offset table, so
1895 both the dynamic object and the regular object will refer to the
1896 same memory location for the variable. */
1898 htab = lm32_elf_hash_table (info);
1900 BFD_ASSERT (s != NULL);
1902 /* We must generate a R_LM32_COPY reloc to tell the dynamic linker
1903 to copy the initial value out of the dynamic object and into the
1904 runtime process image. We need to remember the offset into the
1905 .rela.bss section we are going to use. */
1906 if ((h->root.u.def.section->flags & SEC_ALLOC) != 0)
1910 srel = htab->srelbss;
1911 BFD_ASSERT (srel != NULL);
1912 srel->size += sizeof (Elf32_External_Rela);
1916 return _bfd_elf_adjust_dynamic_copy (h, s);
1919 /* Allocate space in .plt, .got and associated reloc sections for
1923 allocate_dynrelocs (struct elf_link_hash_entry *h, void * inf)
1925 struct bfd_link_info *info;
1926 struct elf_lm32_link_hash_table *htab;
1927 struct elf_lm32_link_hash_entry *eh;
1928 struct elf_lm32_dyn_relocs *p;
1930 if (h->root.type == bfd_link_hash_indirect)
1933 if (h->root.type == bfd_link_hash_warning)
1934 /* When warning symbols are created, they **replace** the "real"
1935 entry in the hash table, thus we never get to see the real
1936 symbol in a hash traversal. So look at it now. */
1937 h = (struct elf_link_hash_entry *) h->root.u.i.link;
1939 info = (struct bfd_link_info *) inf;
1940 htab = lm32_elf_hash_table (info);
1942 eh = (struct elf_lm32_link_hash_entry *) h;
1944 if (htab->root.dynamic_sections_created
1945 && h->plt.refcount > 0)
1947 /* Make sure this symbol is output as a dynamic symbol.
1948 Undefined weak syms won't yet be marked as dynamic. */
1949 if (h->dynindx == -1
1950 && !h->forced_local)
1952 if (! bfd_elf_link_record_dynamic_symbol (info, h))
1956 if (WILL_CALL_FINISH_DYNAMIC_SYMBOL (1, info->shared, h))
1958 asection *s = htab->splt;
1960 /* If this is the first .plt entry, make room for the special
1963 s->size += PLT_ENTRY_SIZE;
1965 h->plt.offset = s->size;
1967 /* If this symbol is not defined in a regular file, and we are
1968 not generating a shared library, then set the symbol to this
1969 location in the .plt. This is required to make function
1970 pointers compare as equal between the normal executable and
1971 the shared library. */
1975 h->root.u.def.section = s;
1976 h->root.u.def.value = h->plt.offset;
1979 /* Make room for this entry. */
1980 s->size += PLT_ENTRY_SIZE;
1982 /* We also need to make an entry in the .got.plt section, which
1983 will be placed in the .got section by the linker script. */
1984 htab->sgotplt->size += 4;
1986 /* We also need to make an entry in the .rel.plt section. */
1987 htab->srelplt->size += sizeof (Elf32_External_Rela);
1991 h->plt.offset = (bfd_vma) -1;
1997 h->plt.offset = (bfd_vma) -1;
2001 if (h->got.refcount > 0)
2006 /* Make sure this symbol is output as a dynamic symbol.
2007 Undefined weak syms won't yet be marked as dynamic. */
2008 if (h->dynindx == -1
2009 && !h->forced_local)
2011 if (! bfd_elf_link_record_dynamic_symbol (info, h))
2017 h->got.offset = s->size;
2019 dyn = htab->root.dynamic_sections_created;
2020 if (WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, info->shared, h))
2021 htab->srelgot->size += sizeof (Elf32_External_Rela);
2024 h->got.offset = (bfd_vma) -1;
2026 if (eh->dyn_relocs == NULL)
2029 /* In the shared -Bsymbolic case, discard space allocated for
2030 dynamic pc-relative relocs against symbols which turn out to be
2031 defined in regular objects. For the normal shared case, discard
2032 space for pc-relative relocs that have become local due to symbol
2033 visibility changes. */
2041 struct elf_lm32_dyn_relocs **pp;
2043 for (pp = &eh->dyn_relocs; (p = *pp) != NULL;)
2045 p->count -= p->pc_count;
2054 /* Also discard relocs on undefined weak syms with non-default
2056 if (eh->dyn_relocs != NULL
2057 && h->root.type == bfd_link_hash_undefweak)
2059 if (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT)
2060 eh->dyn_relocs = NULL;
2062 /* Make sure undefined weak symbols are output as a dynamic
2064 else if (h->dynindx == -1
2065 && !h->forced_local)
2067 if (! bfd_elf_link_record_dynamic_symbol (info, h))
2074 /* For the non-shared case, discard space for relocs against
2075 symbols which turn out to need copy relocs or are not
2081 || (htab->root.dynamic_sections_created
2082 && (h->root.type == bfd_link_hash_undefweak
2083 || h->root.type == bfd_link_hash_undefined))))
2085 /* Make sure this symbol is output as a dynamic symbol.
2086 Undefined weak syms won't yet be marked as dynamic. */
2087 if (h->dynindx == -1
2088 && !h->forced_local)
2090 if (! bfd_elf_link_record_dynamic_symbol (info, h))
2094 /* If that succeeded, we know we'll be keeping all the
2096 if (h->dynindx != -1)
2100 eh->dyn_relocs = NULL;
2105 /* Finally, allocate space. */
2106 for (p = eh->dyn_relocs; p != NULL; p = p->next)
2108 asection *sreloc = elf_section_data (p->sec)->sreloc;
2109 sreloc->size += p->count * sizeof (Elf32_External_Rela);
2115 /* Find any dynamic relocs that apply to read-only sections. */
2118 readonly_dynrelocs (struct elf_link_hash_entry *h, void * inf)
2120 struct elf_lm32_link_hash_entry *eh;
2121 struct elf_lm32_dyn_relocs *p;
2123 if (h->root.type == bfd_link_hash_warning)
2124 h = (struct elf_link_hash_entry *) h->root.u.i.link;
2126 eh = (struct elf_lm32_link_hash_entry *) h;
2127 for (p = eh->dyn_relocs; p != NULL; p = p->next)
2129 asection *s = p->sec->output_section;
2131 if (s != NULL && (s->flags & SEC_READONLY) != 0)
2133 struct bfd_link_info *info = (struct bfd_link_info *) inf;
2135 info->flags |= DF_TEXTREL;
2137 /* Not an error, just cut short the traversal. */
2144 /* Set the sizes of the dynamic sections. */
2147 lm32_elf_size_dynamic_sections (bfd *output_bfd,
2148 struct bfd_link_info *info)
2150 struct elf_lm32_link_hash_table *htab;
2156 htab = lm32_elf_hash_table (info);
2157 dynobj = htab->root.dynobj;
2158 BFD_ASSERT (dynobj != NULL);
2160 if (htab->root.dynamic_sections_created)
2162 /* Set the contents of the .interp section to the interpreter. */
2163 if (info->executable)
2165 s = bfd_get_section_by_name (dynobj, ".interp");
2166 BFD_ASSERT (s != NULL);
2167 s->size = sizeof ELF_DYNAMIC_INTERPRETER;
2168 s->contents = (unsigned char *) ELF_DYNAMIC_INTERPRETER;
2172 /* Set up .got offsets for local syms, and space for local dynamic
2174 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next)
2176 bfd_signed_vma *local_got;
2177 bfd_signed_vma *end_local_got;
2178 bfd_size_type locsymcount;
2179 Elf_Internal_Shdr *symtab_hdr;
2182 if (bfd_get_flavour (ibfd) != bfd_target_elf_flavour)
2185 for (s = ibfd->sections; s != NULL; s = s->next)
2187 struct elf_lm32_dyn_relocs *p;
2189 for (p = ((struct elf_lm32_dyn_relocs *)
2190 elf_section_data (s)->local_dynrel);
2194 if (! bfd_is_abs_section (p->sec)
2195 && bfd_is_abs_section (p->sec->output_section))
2197 /* Input section has been discarded, either because
2198 it is a copy of a linkonce section or due to
2199 linker script /DISCARD/, so we'll be discarding
2202 else if (p->count != 0)
2204 srel = elf_section_data (p->sec)->sreloc;
2205 srel->size += p->count * sizeof (Elf32_External_Rela);
2206 if ((p->sec->output_section->flags & SEC_READONLY) != 0)
2207 info->flags |= DF_TEXTREL;
2212 local_got = elf_local_got_refcounts (ibfd);
2216 symtab_hdr = &elf_tdata (ibfd)->symtab_hdr;
2217 locsymcount = symtab_hdr->sh_info;
2218 end_local_got = local_got + locsymcount;
2220 srel = htab->srelgot;
2221 for (; local_got < end_local_got; ++local_got)
2225 *local_got = s->size;
2228 srel->size += sizeof (Elf32_External_Rela);
2231 *local_got = (bfd_vma) -1;
2235 /* Allocate global sym .plt and .got entries, and space for global
2236 sym dynamic relocs. */
2237 elf_link_hash_traverse (&htab->root, allocate_dynrelocs, info);
2239 /* We now have determined the sizes of the various dynamic sections.
2240 Allocate memory for them. */
2242 for (s = dynobj->sections; s != NULL; s = s->next)
2244 if ((s->flags & SEC_LINKER_CREATED) == 0)
2249 || s == htab->sgotplt
2250 || s == htab->sdynbss)
2252 /* Strip this section if we don't need it; see the
2255 else if (CONST_STRNEQ (bfd_get_section_name (dynobj, s), ".rela"))
2257 if (s->size != 0 && s != htab->srelplt)
2260 /* We use the reloc_count field as a counter if we need
2261 to copy relocs into the output file. */
2265 /* It's not one of our sections, so don't allocate space. */
2270 /* If we don't need this section, strip it from the
2271 output file. This is mostly to handle .rela.bss and
2272 .rela.plt. We must create both sections in
2273 create_dynamic_sections, because they must be created
2274 before the linker maps input sections to output
2275 sections. The linker does that before
2276 adjust_dynamic_symbol is called, and it is that
2277 function which decides whether anything needs to go
2278 into these sections. */
2279 s->flags |= SEC_EXCLUDE;
2283 if ((s->flags & SEC_HAS_CONTENTS) == 0)
2286 /* Allocate memory for the section contents. We use bfd_zalloc
2287 here in case unused entries are not reclaimed before the
2288 section's contents are written out. This should not happen,
2289 but this way if it does, we get a R_LM32_NONE reloc instead
2291 s->contents = bfd_zalloc (dynobj, s->size);
2292 if (s->contents == NULL)
2296 if (htab->root.dynamic_sections_created)
2298 /* Add some entries to the .dynamic section. We fill in the
2299 values later, in lm32_elf_finish_dynamic_sections, but we
2300 must add the entries now so that we get the correct size for
2301 the .dynamic section. The DT_DEBUG entry is filled in by the
2302 dynamic linker and used by the debugger. */
2303 #define add_dynamic_entry(TAG, VAL) \
2304 _bfd_elf_add_dynamic_entry (info, TAG, VAL)
2306 if (info->executable)
2308 if (! add_dynamic_entry (DT_DEBUG, 0))
2312 if (htab->splt->size != 0)
2314 if (! add_dynamic_entry (DT_PLTGOT, 0)
2315 || ! add_dynamic_entry (DT_PLTRELSZ, 0)
2316 || ! add_dynamic_entry (DT_PLTREL, DT_RELA)
2317 || ! add_dynamic_entry (DT_JMPREL, 0))
2323 if (! add_dynamic_entry (DT_RELA, 0)
2324 || ! add_dynamic_entry (DT_RELASZ, 0)
2325 || ! add_dynamic_entry (DT_RELAENT,
2326 sizeof (Elf32_External_Rela)))
2329 /* If any dynamic relocs apply to a read-only section,
2330 then we need a DT_TEXTREL entry. */
2331 if ((info->flags & DF_TEXTREL) == 0)
2332 elf_link_hash_traverse (&htab->root, readonly_dynrelocs,
2335 if ((info->flags & DF_TEXTREL) != 0)
2337 if (! add_dynamic_entry (DT_TEXTREL, 0))
2342 #undef add_dynamic_entry
2344 /* Allocate .rofixup section. */
2345 if (IS_FDPIC (output_bfd))
2347 struct weak_symbol_list *list_start = NULL, *list_end = NULL;
2348 int rgot_weak_count = 0;
2351 /* Look for deleted sections. */
2352 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next)
2354 for (s = ibfd->sections; s != NULL; s = s->next)
2358 /* Count relocs that need .rofixup entires. */
2359 Elf_Internal_Rela *internal_relocs, *end;
2360 internal_relocs = elf_section_data (s)->relocs;
2361 if (internal_relocs == NULL)
2362 internal_relocs = (_bfd_elf_link_read_relocs (ibfd, s, NULL, NULL, FALSE));
2363 if (internal_relocs != NULL)
2365 end = internal_relocs + s->reloc_count;
2366 while (internal_relocs < end)
2368 Elf_Internal_Shdr *symtab_hdr = &elf_tdata (ibfd)->symtab_hdr;
2369 struct elf_link_hash_entry **sym_hashes = elf_sym_hashes (ibfd);
2370 unsigned long r_symndx;
2371 struct elf_link_hash_entry *h;
2373 symtab_hdr = &elf_tdata (ibfd)->symtab_hdr;
2374 sym_hashes = elf_sym_hashes (ibfd);
2375 r_symndx = ELF32_R_SYM (internal_relocs->r_info);
2377 if (r_symndx < symtab_hdr->sh_info)
2382 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
2383 while (h->root.type == bfd_link_hash_indirect
2384 || h->root.type == bfd_link_hash_warning)
2385 h = (struct elf_link_hash_entry *) h->root.u.i.link;
2388 /* Don't generate entries for weak symbols. */
2389 if (!h || (h && h->root.type != bfd_link_hash_undefweak))
2391 if (!elf_discarded_section (s) && !((bfd_get_section_flags (ibfd, s) & SEC_ALLOC) == 0))
2393 switch (ELF32_R_TYPE (internal_relocs->r_info))
2406 struct weak_symbol_list *current, *new_entry;
2407 /* Is this symbol already in the list? */
2408 for (current = list_start; current; current = current->next)
2410 if (!strcmp (current->name, h->root.root.string))
2413 if (!current && !elf_discarded_section (s) && (bfd_get_section_flags (ibfd, s) & SEC_ALLOC))
2415 /* Will this have an entry in the GOT. */
2416 if (ELF32_R_TYPE (internal_relocs->r_info) == R_LM32_16_GOT)
2418 /* Create a new entry. */
2419 new_entry = malloc (sizeof (struct weak_symbol_list));
2422 new_entry->name = h->root.root.string;
2423 new_entry->next = NULL;
2425 if (list_start == NULL)
2427 list_start = new_entry;
2428 list_end = new_entry;
2432 list_end->next = new_entry;
2433 list_end = new_entry;
2435 /* Increase count of undefined weak symbols in the got. */
2451 list_end = list_start->next;
2453 list_start = list_end;
2456 /* Size sections. */
2457 lm32fdpic_fixup32_section (info)->size = (r32_count + (htab->sgot->size / 4) - rgot_weak_count + 1) * 4;
2458 if (lm32fdpic_fixup32_section (info)->size == 0)
2459 lm32fdpic_fixup32_section (info)->flags |= SEC_EXCLUDE;
2462 lm32fdpic_fixup32_section (info)->contents =
2463 bfd_zalloc (dynobj, lm32fdpic_fixup32_section (info)->size);
2464 if (lm32fdpic_fixup32_section (info)->contents == NULL)
2472 /* Create dynamic sections when linking against a dynamic object. */
2475 lm32_elf_create_dynamic_sections (bfd *abfd, struct bfd_link_info *info)
2477 struct elf_lm32_link_hash_table *htab;
2478 flagword flags, pltflags;
2480 const struct elf_backend_data *bed = get_elf_backend_data (abfd);
2481 int ptralign = 2; /* 32bit */
2483 htab = lm32_elf_hash_table (info);
2485 /* Make sure we have a GOT - For the case where we have a dynamic object
2486 but none of the relocs in check_relocs */
2487 if (! create_got_section (abfd, info))
2489 if (IS_FDPIC (abfd) && (htab->sfixup32 == NULL))
2491 if (! create_rofixup_section (abfd, info))
2495 /* We need to create .plt, .rel[a].plt, .got, .got.plt, .dynbss, and
2496 .rel[a].bss sections. */
2497 flags = (SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS | SEC_IN_MEMORY
2498 | SEC_LINKER_CREATED);
2501 pltflags |= SEC_CODE;
2502 if (bed->plt_not_loaded)
2503 pltflags &= ~ (SEC_LOAD | SEC_HAS_CONTENTS);
2504 if (bed->plt_readonly)
2505 pltflags |= SEC_READONLY;
2507 s = bfd_make_section_with_flags (abfd, ".plt", pltflags);
2510 || ! bfd_set_section_alignment (abfd, s, bed->plt_alignment))
2513 if (bed->want_plt_sym)
2515 /* Define the symbol _PROCEDURE_LINKAGE_TABLE_ at the start of the
2517 struct bfd_link_hash_entry *bh = NULL;
2518 struct elf_link_hash_entry *h;
2520 if (! (_bfd_generic_link_add_one_symbol
2521 (info, abfd, "_PROCEDURE_LINKAGE_TABLE_", BSF_GLOBAL, s,
2522 (bfd_vma) 0, NULL, FALSE,
2523 get_elf_backend_data (abfd)->collect, &bh)))
2525 h = (struct elf_link_hash_entry *) bh;
2527 h->type = STT_OBJECT;
2528 htab->root.hplt = h;
2531 && ! bfd_elf_link_record_dynamic_symbol (info, h))
2535 s = bfd_make_section_with_flags (abfd,
2536 bed->default_use_rela_p ? ".rela.plt" : ".rel.plt",
2537 flags | SEC_READONLY);
2540 || ! bfd_set_section_alignment (abfd, s, ptralign))
2543 if (htab->sgot == NULL
2544 && ! create_got_section (abfd, info))
2548 const char *secname;
2553 for (sec = abfd->sections; sec; sec = sec->next)
2555 secflags = bfd_get_section_flags (abfd, sec);
2556 if ((secflags & (SEC_DATA | SEC_LINKER_CREATED))
2557 || ((secflags & SEC_HAS_CONTENTS) != SEC_HAS_CONTENTS))
2559 secname = bfd_get_section_name (abfd, sec);
2560 relname = bfd_malloc ((bfd_size_type) strlen (secname) + 6);
2561 strcpy (relname, ".rela");
2562 strcat (relname, secname);
2563 if (bfd_get_section_by_name (abfd, secname))
2565 s = bfd_make_section_with_flags (abfd, relname,
2566 flags | SEC_READONLY);
2568 || ! bfd_set_section_alignment (abfd, s, ptralign))
2573 if (bed->want_dynbss)
2575 /* The .dynbss section is a place to put symbols which are defined
2576 by dynamic objects, are referenced by regular objects, and are
2577 not functions. We must allocate space for them in the process
2578 image and use a R_*_COPY reloc to tell the dynamic linker to
2579 initialize them at run time. The linker script puts the .dynbss
2580 section into the .bss section of the final image. */
2581 s = bfd_make_section_with_flags (abfd, ".dynbss",
2582 SEC_ALLOC | SEC_LINKER_CREATED);
2586 /* The .rel[a].bss section holds copy relocs. This section is not
2587 normally needed. We need to create it here, though, so that the
2588 linker will map it to an output section. We can't just create it
2589 only if we need it, because we will not know whether we need it
2590 until we have seen all the input files, and the first time the
2591 main linker code calls BFD after examining all the input files
2592 (size_dynamic_sections) the input sections have already been
2593 mapped to the output sections. If the section turns out not to
2594 be needed, we can discard it later. We will never need this
2595 section when generating a shared object, since they do not use
2599 s = bfd_make_section_with_flags (abfd,
2600 (bed->default_use_rela_p
2601 ? ".rela.bss" : ".rel.bss"),
2602 flags | SEC_READONLY);
2605 || ! bfd_set_section_alignment (abfd, s, ptralign))
2613 /* Copy the extra info we tack onto an elf_link_hash_entry. */
2616 lm32_elf_copy_indirect_symbol (struct bfd_link_info *info,
2617 struct elf_link_hash_entry *dir,
2618 struct elf_link_hash_entry *ind)
2620 struct elf_lm32_link_hash_entry * edir;
2621 struct elf_lm32_link_hash_entry * eind;
2623 edir = (struct elf_lm32_link_hash_entry *) dir;
2624 eind = (struct elf_lm32_link_hash_entry *) ind;
2626 if (eind->dyn_relocs != NULL)
2628 if (edir->dyn_relocs != NULL)
2630 struct elf_lm32_dyn_relocs **pp;
2631 struct elf_lm32_dyn_relocs *p;
2633 /* Add reloc counts against the indirect sym to the direct sym
2634 list. Merge any entries against the same section. */
2635 for (pp = &eind->dyn_relocs; (p = *pp) != NULL;)
2637 struct elf_lm32_dyn_relocs *q;
2639 for (q = edir->dyn_relocs; q != NULL; q = q->next)
2640 if (q->sec == p->sec)
2642 q->pc_count += p->pc_count;
2643 q->count += p->count;
2650 *pp = edir->dyn_relocs;
2653 edir->dyn_relocs = eind->dyn_relocs;
2654 eind->dyn_relocs = NULL;
2657 _bfd_elf_link_hash_copy_indirect (info, dir, ind);
2661 lm32_elf_always_size_sections (bfd *output_bfd,
2662 struct bfd_link_info *info)
2664 if (!info->relocatable)
2666 struct elf_link_hash_entry *h;
2668 /* Force a PT_GNU_STACK segment to be created. */
2669 if (! elf_tdata (output_bfd)->stack_flags)
2670 elf_tdata (output_bfd)->stack_flags = PF_R | PF_W | PF_X;
2672 /* Define __stacksize if it's not defined yet. */
2673 h = elf_link_hash_lookup (elf_hash_table (info), "__stacksize",
2674 FALSE, FALSE, FALSE);
2675 if (! h || h->root.type != bfd_link_hash_defined
2676 || h->type != STT_OBJECT
2679 struct bfd_link_hash_entry *bh = NULL;
2681 if (!(_bfd_generic_link_add_one_symbol
2682 (info, output_bfd, "__stacksize",
2683 BSF_GLOBAL, bfd_abs_section_ptr, DEFAULT_STACK_SIZE,
2684 (const char *) NULL, FALSE,
2685 get_elf_backend_data (output_bfd)->collect, &bh)))
2688 h = (struct elf_link_hash_entry *) bh;
2690 h->type = STT_OBJECT;
2691 /* This one must NOT be hidden. */
2699 lm32_elf_modify_segment_map (bfd *output_bfd,
2700 struct bfd_link_info *info)
2702 struct elf_segment_map *m;
2704 /* objcopy and strip preserve what's already there using elf32_lm32fdpic_copy_
2705 private_bfd_data (). */
2709 for (m = elf_tdata (output_bfd)->segment_map; m != NULL; m = m->next)
2710 if (m->p_type == PT_GNU_STACK)
2715 asection *sec = bfd_get_section_by_name (output_bfd, ".stack");
2716 struct elf_link_hash_entry *h;
2720 /* Obtain the pointer to the __stacksize symbol. */
2721 h = elf_link_hash_lookup (elf_hash_table (info), "__stacksize",
2722 FALSE, FALSE, FALSE);
2723 while (h->root.type == bfd_link_hash_indirect
2724 || h->root.type == bfd_link_hash_warning)
2725 h = (struct elf_link_hash_entry *)h->root.u.i.link;
2726 BFD_ASSERT (h->root.type == bfd_link_hash_defined);
2728 /* Set the section size from the symbol value. We
2729 intentionally ignore the symbol section. */
2730 if (h->root.type == bfd_link_hash_defined)
2731 sec->size = h->root.u.def.value;
2733 sec->size = DEFAULT_STACK_SIZE;
2735 /* Add the stack section to the PT_GNU_STACK segment,
2736 such that its size and alignment requirements make it
2738 m->sections[m->count] = sec;
2747 lm32_elf_modify_program_headers (bfd *output_bfd,
2748 struct bfd_link_info *info)
2750 struct elf_obj_tdata *tdata = elf_tdata (output_bfd);
2751 struct elf_segment_map *m;
2752 Elf_Internal_Phdr *p;
2757 for (p = tdata->phdr, m = tdata->segment_map; m != NULL; m = m->next, p++)
2758 if (m->p_type == PT_GNU_STACK)
2763 struct elf_link_hash_entry *h;
2765 /* Obtain the pointer to the __stacksize symbol. */
2766 h = elf_link_hash_lookup (elf_hash_table (info), "__stacksize",
2767 FALSE, FALSE, FALSE);
2770 while (h->root.type == bfd_link_hash_indirect
2771 || h->root.type == bfd_link_hash_warning)
2772 h = (struct elf_link_hash_entry *) h->root.u.i.link;
2773 BFD_ASSERT (h->root.type == bfd_link_hash_defined);
2776 /* Set the header p_memsz from the symbol value. We
2777 intentionally ignore the symbol section. */
2778 if (h && h->root.type == bfd_link_hash_defined)
2779 p->p_memsz = h->root.u.def.value;
2781 p->p_memsz = DEFAULT_STACK_SIZE;
2791 lm32_elf_copy_private_bfd_data (bfd *ibfd, bfd *obfd)
2793 if (bfd_get_flavour (ibfd) != bfd_target_elf_flavour
2794 || bfd_get_flavour (obfd) != bfd_target_elf_flavour)
2797 BFD_ASSERT (!elf_flags_init (obfd)
2798 || elf_elfheader (obfd)->e_flags == elf_elfheader (ibfd)->e_flags);
2800 elf_elfheader (obfd)->e_flags = elf_elfheader (ibfd)->e_flags;
2801 elf_flags_init (obfd) = TRUE;
2803 /* Copy object attributes. */
2804 _bfd_elf_copy_obj_attributes (ibfd, obfd);
2811 lm32_elf_fdpic_copy_private_bfd_data (bfd *ibfd, bfd *obfd)
2815 if (bfd_get_flavour (ibfd) != bfd_target_elf_flavour
2816 || bfd_get_flavour (obfd) != bfd_target_elf_flavour)
2819 if (! lm32_elf_copy_private_bfd_data (ibfd, obfd))
2822 if (! elf_tdata (ibfd) || ! elf_tdata (ibfd)->phdr
2823 || ! elf_tdata (obfd) || ! elf_tdata (obfd)->phdr)
2826 /* Copy the stack size. */
2827 for (i = 0; i < elf_elfheader (ibfd)->e_phnum; i++)
2828 if (elf_tdata (ibfd)->phdr[i].p_type == PT_GNU_STACK)
2830 Elf_Internal_Phdr *iphdr = &elf_tdata (ibfd)->phdr[i];
2832 for (i = 0; i < elf_elfheader (obfd)->e_phnum; i++)
2833 if (elf_tdata (obfd)->phdr[i].p_type == PT_GNU_STACK)
2835 memcpy (&elf_tdata (obfd)->phdr[i], iphdr, sizeof (*iphdr));
2837 /* Rewrite the phdrs, since we're only called after they were first written. */
2838 if (bfd_seek (obfd, (bfd_signed_vma) get_elf_backend_data (obfd)
2839 ->s->sizeof_ehdr, SEEK_SET) != 0
2840 || get_elf_backend_data (obfd)->s->write_out_phdrs (obfd, elf_tdata (obfd)->phdr,
2841 elf_elfheader (obfd)->e_phnum) != 0)
2853 #define ELF_ARCH bfd_arch_lm32
2854 #define ELF_MACHINE_CODE EM_LATTICEMICO32
2855 #define ELF_MAXPAGESIZE 0x1000
2857 #define TARGET_BIG_SYM bfd_elf32_lm32_vec
2858 #define TARGET_BIG_NAME "elf32-lm32"
2860 #define bfd_elf32_bfd_reloc_type_lookup lm32_reloc_type_lookup
2861 #define bfd_elf32_bfd_reloc_name_lookup lm32_reloc_name_lookup
2862 #define elf_info_to_howto lm32_info_to_howto_rela
2863 #define elf_info_to_howto_rel 0
2864 #define elf_backend_rela_normal 1
2865 #define elf_backend_object_p lm32_elf_object_p
2866 #define elf_backend_final_write_processing lm32_elf_final_write_processing
2867 #define elf_backend_can_gc_sections 1
2868 #define elf_backend_can_refcount 1
2869 #define elf_backend_gc_mark_hook lm32_elf_gc_mark_hook
2870 #define elf_backend_gc_sweep_hook lm32_elf_gc_sweep_hook
2871 #define elf_backend_plt_readonly 1
2872 #define elf_backend_want_got_plt 1
2873 #define elf_backend_want_plt_sym 0
2874 #define elf_backend_got_header_size 12
2875 #define bfd_elf32_bfd_link_hash_table_create lm32_elf_link_hash_table_create
2876 #define elf_backend_check_relocs lm32_elf_check_relocs
2877 #define elf_backend_reloc_type_class lm32_elf_reloc_type_class
2878 #define elf_backend_copy_indirect_symbol lm32_elf_copy_indirect_symbol
2879 #define elf_backend_size_dynamic_sections lm32_elf_size_dynamic_sections
2880 #define elf_backend_omit_section_dynsym ((bfd_boolean (*) (bfd *, struct bfd_link_info *, asection *)) bfd_true)
2881 #define elf_backend_create_dynamic_sections lm32_elf_create_dynamic_sections
2882 #define elf_backend_finish_dynamic_sections lm32_elf_finish_dynamic_sections
2883 #define elf_backend_adjust_dynamic_symbol lm32_elf_adjust_dynamic_symbol
2884 #define elf_backend_finish_dynamic_symbol lm32_elf_finish_dynamic_symbol
2885 #define elf_backend_relocate_section lm32_elf_relocate_section
2887 #include "elf32-target.h"
2889 #undef ELF_MAXPAGESIZE
2890 #define ELF_MAXPAGESIZE 0x4000
2893 #undef TARGET_BIG_SYM
2894 #define TARGET_BIG_SYM bfd_elf32_lm32fdpic_vec
2895 #undef TARGET_BIG_NAME
2896 #define TARGET_BIG_NAME "elf32-lm32fdpic"
2898 #define elf32_bed elf32_lm32fdpic_bed
2900 #undef elf_backend_always_size_sections
2901 #define elf_backend_always_size_sections lm32_elf_always_size_sections
2902 #undef elf_backend_modify_segment_map
2903 #define elf_backend_modify_segment_map lm32_elf_modify_segment_map
2904 #undef elf_backend_modify_program_headers
2905 #define elf_backend_modify_program_headers lm32_elf_modify_program_headers
2906 #undef bfd_elf32_bfd_copy_private_bfd_data
2907 #define bfd_elf32_bfd_copy_private_bfd_data lm32_elf_fdpic_copy_private_bfd_data
2909 #include "elf32-target.h"