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 htab->srelgot = bfd_get_section_by_name (dynobj, ".rela.got");
229 if (! htab->sgot || ! htab->sgotplt || ! htab->srelgot)
235 /* Create .rofixup sections in DYNOBJ, and set up
236 shortcuts to them in our hash table. */
239 create_rofixup_section (bfd *dynobj, struct bfd_link_info *info)
241 struct elf_lm32_link_hash_table *htab;
242 htab = lm32_elf_hash_table (info);
244 /* Fixup section for R_LM32_32 relocs */
245 lm32fdpic_fixup32_section (info) = bfd_make_section_with_flags (dynobj,
253 if (lm32fdpic_fixup32_section (info) == NULL
254 || ! bfd_set_section_alignment (dynobj, lm32fdpic_fixup32_section (info), 2))
260 static reloc_howto_type lm32_elf_howto_table [] =
262 /* This reloc does nothing. */
263 HOWTO (R_LM32_NONE, /* type */
265 2, /* size (0 = byte, 1 = short, 2 = long) */
267 FALSE, /* pc_relative */
269 complain_overflow_bitfield,/* complain_on_overflow */
270 bfd_elf_generic_reloc, /* special_function */
271 "R_LM32_NONE", /* name */
272 FALSE, /* partial_inplace */
275 FALSE), /* pcrel_offset */
277 /* An 8 bit absolute relocation. */
278 HOWTO (R_LM32_8, /* type */
280 0, /* size (0 = byte, 1 = short, 2 = long) */
282 FALSE, /* pc_relative */
284 complain_overflow_bitfield,/* complain_on_overflow */
285 bfd_elf_generic_reloc, /* special_function */
286 "R_LM32_8", /* name */
287 FALSE, /* partial_inplace */
290 FALSE), /* pcrel_offset */
292 /* A 16 bit absolute relocation. */
293 HOWTO (R_LM32_16, /* type */
295 1, /* size (0 = byte, 1 = short, 2 = long) */
297 FALSE, /* pc_relative */
299 complain_overflow_bitfield,/* complain_on_overflow */
300 bfd_elf_generic_reloc, /* special_function */
301 "R_LM32_16", /* name */
302 FALSE, /* partial_inplace */
304 0xffff, /* dst_mask */
305 FALSE), /* pcrel_offset */
307 /* A 32 bit absolute relocation. */
308 HOWTO (R_LM32_32, /* type */
310 2, /* size (0 = byte, 1 = short, 2 = long) */
312 FALSE, /* pc_relative */
314 complain_overflow_bitfield,/* complain_on_overflow */
315 bfd_elf_generic_reloc, /* special_function */
316 "R_LM32_32", /* name */
317 FALSE, /* partial_inplace */
319 0xffffffff, /* dst_mask */
320 FALSE), /* pcrel_offset */
322 HOWTO (R_LM32_HI16, /* type */
324 2, /* size (0 = byte, 1 = short, 2 = long) */
326 FALSE, /* pc_relative */
328 complain_overflow_bitfield,/* complain_on_overflow */
329 bfd_elf_generic_reloc, /* special_function */
330 "R_LM32_HI16", /* name */
331 FALSE, /* partial_inplace */
333 0xffff, /* dst_mask */
334 FALSE), /* pcrel_offset */
336 HOWTO (R_LM32_LO16, /* type */
338 2, /* size (0 = byte, 1 = short, 2 = long) */
340 FALSE, /* pc_relative */
342 complain_overflow_dont, /* complain_on_overflow */
343 bfd_elf_generic_reloc, /* special_function */
344 "R_LM32_LO16", /* name */
345 FALSE, /* partial_inplace */
347 0xffff, /* dst_mask */
348 FALSE), /* pcrel_offset */
350 HOWTO (R_LM32_GPREL16, /* type */
352 2, /* size (0 = byte, 1 = short, 2 = long) */
354 FALSE, /* pc_relative */
356 complain_overflow_dont, /* complain_on_overflow */
357 lm32_elf_gprel_reloc, /* special_function */
358 "R_LM32_GPREL16", /* name */
359 FALSE, /* partial_inplace */
361 0xffff, /* dst_mask */
362 FALSE), /* pcrel_offset */
364 HOWTO (R_LM32_CALL, /* type */
366 2, /* size (0 = byte, 1 = short, 2 = long) */
368 TRUE, /* pc_relative */
370 complain_overflow_signed, /* complain_on_overflow */
371 bfd_elf_generic_reloc, /* special_function */
372 "R_LM32_CALL", /* name */
373 FALSE, /* partial_inplace */
375 0x3ffffff, /* dst_mask */
376 TRUE), /* pcrel_offset */
378 HOWTO (R_LM32_BRANCH, /* type */
380 2, /* size (0 = byte, 1 = short, 2 = long) */
382 TRUE, /* pc_relative */
384 complain_overflow_signed, /* complain_on_overflow */
385 bfd_elf_generic_reloc, /* special_function */
386 "R_LM32_BRANCH", /* name */
387 FALSE, /* partial_inplace */
389 0xffff, /* dst_mask */
390 TRUE), /* pcrel_offset */
392 /* GNU extension to record C++ vtable hierarchy. */
393 HOWTO (R_LM32_GNU_VTINHERIT, /* type */
395 2, /* size (0 = byte, 1 = short, 2 = long) */
397 FALSE, /* pc_relative */
399 complain_overflow_dont, /* complain_on_overflow */
400 NULL, /* special_function */
401 "R_LM32_GNU_VTINHERIT", /* name */
402 FALSE, /* partial_inplace */
405 FALSE), /* pcrel_offset */
407 /* GNU extension to record C++ vtable member usage. */
408 HOWTO (R_LM32_GNU_VTENTRY, /* type */
410 2, /* size (0 = byte, 1 = short, 2 = long) */
412 FALSE, /* pc_relative */
414 complain_overflow_dont, /* complain_on_overflow */
415 _bfd_elf_rel_vtable_reloc_fn,/* special_function */
416 "R_LM32_GNU_VTENTRY", /* name */
417 FALSE, /* partial_inplace */
420 FALSE), /* pcrel_offset */
422 HOWTO (R_LM32_16_GOT, /* type */
424 2, /* size (0 = byte, 1 = short, 2 = long) */
426 FALSE, /* pc_relative */
428 complain_overflow_signed, /* complain_on_overflow */
429 bfd_elf_generic_reloc, /* special_function */
430 "R_LM32_16_GOT", /* name */
431 FALSE, /* partial_inplace */
433 0xffff, /* dst_mask */
434 FALSE), /* pcrel_offset */
436 HOWTO (R_LM32_GOTOFF_HI16, /* type */
438 2, /* size (0 = byte, 1 = short, 2 = long) */
440 FALSE, /* pc_relative */
442 complain_overflow_dont, /* complain_on_overflow */
443 bfd_elf_generic_reloc, /* special_function */
444 "R_LM32_GOTOFF_HI16", /* name */
445 FALSE, /* partial_inplace */
446 0xffff, /* src_mask */
447 0xffff, /* dst_mask */
448 FALSE), /* pcrel_offset */
450 HOWTO (R_LM32_GOTOFF_LO16, /* type */
452 2, /* size (0 = byte, 1 = short, 2 = long) */
454 FALSE, /* pc_relative */
456 complain_overflow_dont, /* complain_on_overflow */
457 bfd_elf_generic_reloc, /* special_function */
458 "R_LM32_GOTOFF_LO16", /* name */
459 FALSE, /* partial_inplace */
460 0xffff, /* src_mask */
461 0xffff, /* dst_mask */
462 FALSE), /* pcrel_offset */
464 HOWTO (R_LM32_COPY, /* type */
466 2, /* size (0 = byte, 1 = short, 2 = long) */
468 FALSE, /* pc_relative */
470 complain_overflow_bitfield, /* complain_on_overflow */
471 bfd_elf_generic_reloc, /* special_function */
472 "R_LM32_COPY", /* name */
473 FALSE, /* partial_inplace */
474 0xffffffff, /* src_mask */
475 0xffffffff, /* dst_mask */
476 FALSE), /* pcrel_offset */
478 HOWTO (R_LM32_GLOB_DAT, /* type */
480 2, /* size (0 = byte, 1 = short, 2 = long) */
482 FALSE, /* pc_relative */
484 complain_overflow_bitfield, /* complain_on_overflow */
485 bfd_elf_generic_reloc, /* special_function */
486 "R_LM32_GLOB_DAT", /* name */
487 FALSE, /* partial_inplace */
488 0xffffffff, /* src_mask */
489 0xffffffff, /* dst_mask */
490 FALSE), /* pcrel_offset */
492 HOWTO (R_LM32_JMP_SLOT, /* type */
494 2, /* size (0 = byte, 1 = short, 2 = long) */
496 FALSE, /* pc_relative */
498 complain_overflow_bitfield, /* complain_on_overflow */
499 bfd_elf_generic_reloc, /* special_function */
500 "R_LM32_JMP_SLOT", /* name */
501 FALSE, /* partial_inplace */
502 0xffffffff, /* src_mask */
503 0xffffffff, /* dst_mask */
504 FALSE), /* pcrel_offset */
506 HOWTO (R_LM32_RELATIVE, /* type */
508 2, /* size (0 = byte, 1 = short, 2 = long) */
510 FALSE, /* pc_relative */
512 complain_overflow_bitfield, /* complain_on_overflow */
513 bfd_elf_generic_reloc, /* special_function */
514 "R_LM32_RELATIVE", /* name */
515 FALSE, /* partial_inplace */
516 0xffffffff, /* src_mask */
517 0xffffffff, /* dst_mask */
518 FALSE), /* pcrel_offset */
522 /* Map BFD reloc types to lm32 ELF reloc types. */
524 struct lm32_reloc_map
526 bfd_reloc_code_real_type bfd_reloc_val;
527 unsigned char elf_reloc_val;
530 static const struct lm32_reloc_map lm32_reloc_map[] =
532 { BFD_RELOC_NONE, R_LM32_NONE },
533 { BFD_RELOC_8, R_LM32_8 },
534 { BFD_RELOC_16, R_LM32_16 },
535 { BFD_RELOC_32, R_LM32_32 },
536 { BFD_RELOC_HI16, R_LM32_HI16 },
537 { BFD_RELOC_LO16, R_LM32_LO16 },
538 { BFD_RELOC_GPREL16, R_LM32_GPREL16 },
539 { BFD_RELOC_LM32_CALL, R_LM32_CALL },
540 { BFD_RELOC_LM32_BRANCH, R_LM32_BRANCH },
541 { BFD_RELOC_VTABLE_INHERIT, R_LM32_GNU_VTINHERIT },
542 { BFD_RELOC_VTABLE_ENTRY, R_LM32_GNU_VTENTRY },
543 { BFD_RELOC_LM32_16_GOT, R_LM32_16_GOT },
544 { BFD_RELOC_LM32_GOTOFF_HI16, R_LM32_GOTOFF_HI16 },
545 { BFD_RELOC_LM32_GOTOFF_LO16, R_LM32_GOTOFF_LO16 },
546 { BFD_RELOC_LM32_COPY, R_LM32_COPY },
547 { BFD_RELOC_LM32_GLOB_DAT, R_LM32_GLOB_DAT },
548 { BFD_RELOC_LM32_JMP_SLOT, R_LM32_JMP_SLOT },
549 { BFD_RELOC_LM32_RELATIVE, R_LM32_RELATIVE },
552 static reloc_howto_type *
553 lm32_reloc_type_lookup (bfd *abfd ATTRIBUTE_UNUSED,
554 bfd_reloc_code_real_type code)
558 for (i = 0; i < sizeof (lm32_reloc_map) / sizeof (lm32_reloc_map[0]); i++)
559 if (lm32_reloc_map[i].bfd_reloc_val == code)
560 return &lm32_elf_howto_table[lm32_reloc_map[i].elf_reloc_val];
564 static reloc_howto_type *
565 lm32_reloc_name_lookup (bfd *abfd ATTRIBUTE_UNUSED,
571 i < sizeof (lm32_elf_howto_table) / sizeof (lm32_elf_howto_table[0]);
573 if (lm32_elf_howto_table[i].name != NULL
574 && strcasecmp (lm32_elf_howto_table[i].name, r_name) == 0)
575 return &lm32_elf_howto_table[i];
581 /* Set the howto pointer for an Lattice Mico32 ELF reloc. */
584 lm32_info_to_howto_rela (bfd *abfd ATTRIBUTE_UNUSED,
586 Elf_Internal_Rela *dst)
590 r_type = ELF32_R_TYPE (dst->r_info);
591 BFD_ASSERT (r_type < (unsigned int) R_LM32_max);
592 cache_ptr->howto = &lm32_elf_howto_table[r_type];
595 /* Set the right machine number for an Lattice Mico32 ELF file. */
598 lm32_elf_object_p (bfd *abfd)
600 return bfd_default_set_arch_mach (abfd, bfd_arch_lm32, bfd_mach_lm32);
603 /* Set machine type flags just before file is written out. */
606 lm32_elf_final_write_processing (bfd *abfd, bfd_boolean linker ATTRIBUTE_UNUSED)
608 elf_elfheader (abfd)->e_machine = EM_LATTICEMICO32;
609 elf_elfheader (abfd)->e_flags &=~ EF_LM32_MACH;
610 switch (bfd_get_mach (abfd))
613 elf_elfheader (abfd)->e_flags |= E_LM32_MACH;
620 /* Set the GP value for OUTPUT_BFD. Returns FALSE if this is a
621 dangerous relocation. */
624 lm32_elf_assign_gp (bfd *output_bfd, bfd_vma *pgp)
630 /* If we've already figured out what GP will be, just return it. */
631 *pgp = _bfd_get_gp_value (output_bfd);
635 count = bfd_get_symcount (output_bfd);
636 sym = bfd_get_outsymbols (output_bfd);
638 /* The linker script will have created a symbol named `_gp' with the
639 appropriate value. */
644 for (i = 0; i < count; i++, sym++)
648 name = bfd_asymbol_name (*sym);
649 if (*name == '_' && strcmp (name, "_gp") == 0)
651 *pgp = bfd_asymbol_value (*sym);
652 _bfd_set_gp_value (output_bfd, *pgp);
660 /* Only get the error once. */
662 _bfd_set_gp_value (output_bfd, *pgp);
669 /* We have to figure out the gp value, so that we can adjust the
670 symbol value correctly. We look up the symbol _gp in the output
671 BFD. If we can't find it, we're stuck. We cache it in the ELF
672 target data. We don't need to adjust the symbol value for an
673 external symbol if we are producing relocatable output. */
675 static bfd_reloc_status_type
676 lm32_elf_final_gp (bfd *output_bfd, asymbol *symbol, bfd_boolean relocatable,
677 char **error_message, bfd_vma *pgp)
679 if (bfd_is_und_section (symbol->section) && !relocatable)
682 return bfd_reloc_undefined;
685 *pgp = _bfd_get_gp_value (output_bfd);
686 if (*pgp == 0 && (!relocatable || (symbol->flags & BSF_SECTION_SYM) != 0))
690 /* Make up a value. */
691 *pgp = symbol->section->output_section->vma + 0x4000;
692 _bfd_set_gp_value (output_bfd, *pgp);
694 else if (!lm32_elf_assign_gp (output_bfd, pgp))
698 _("global pointer relative relocation when _gp not defined");
699 return bfd_reloc_dangerous;
706 static bfd_reloc_status_type
707 lm32_elf_do_gprel_relocate (bfd *abfd,
708 reloc_howto_type *howto,
709 asection *input_section ATTRIBUTE_UNUSED,
712 bfd_vma symbol_value,
715 return _bfd_final_link_relocate (howto, abfd, input_section,
716 data, offset, symbol_value, addend);
719 static bfd_reloc_status_type
720 lm32_elf_gprel_reloc (bfd *abfd,
721 arelent *reloc_entry,
724 asection *input_section,
730 bfd_reloc_status_type r;
732 if (output_bfd != (bfd *) NULL
733 && (symbol->flags & BSF_SECTION_SYM) == 0
734 && (!reloc_entry->howto->partial_inplace || reloc_entry->addend == 0))
736 reloc_entry->address += input_section->output_offset;
740 if (output_bfd != NULL)
743 relocation = symbol->value
744 + symbol->section->output_section->vma + symbol->section->output_offset;
747 lm32_elf_final_gp (abfd, symbol, FALSE, msg, &gp)) == bfd_reloc_ok)
749 relocation = relocation + reloc_entry->addend - gp;
750 reloc_entry->addend = 0;
751 if ((signed) relocation < -32768 || (signed) relocation > 32767)
753 *msg = _("global pointer relative address out of range");
754 r = bfd_reloc_outofrange;
758 r = lm32_elf_do_gprel_relocate (abfd, reloc_entry->howto,
760 data, reloc_entry->address,
761 relocation, reloc_entry->addend);
768 /* Find the segment number in which OSEC, and output section, is
772 _lm32fdpic_osec_to_segment (bfd *output_bfd, asection *osec)
774 struct elf_segment_map *m;
775 Elf_Internal_Phdr *p;
777 /* Find the segment that contains the output_section. */
778 for (m = elf_tdata (output_bfd)->segment_map,
779 p = elf_tdata (output_bfd)->phdr;
785 for (i = m->count - 1; i >= 0; i--)
786 if (m->sections[i] == osec)
793 return p - elf_tdata (output_bfd)->phdr;
796 /* Determine if an output section is read-only. */
798 inline static bfd_boolean
799 _lm32fdpic_osec_readonly_p (bfd *output_bfd, asection *osec)
801 unsigned seg = _lm32fdpic_osec_to_segment (output_bfd, osec);
803 return ! (elf_tdata (output_bfd)->phdr[seg].p_flags & PF_W);
806 /* Relocate a section */
809 lm32_elf_relocate_section (bfd *output_bfd,
810 struct bfd_link_info *info,
812 asection *input_section,
814 Elf_Internal_Rela *relocs,
815 Elf_Internal_Sym *local_syms,
816 asection **local_sections)
818 Elf_Internal_Shdr *symtab_hdr = &elf_tdata (input_bfd)->symtab_hdr;
819 struct elf_link_hash_entry **sym_hashes = elf_sym_hashes (input_bfd);
820 Elf_Internal_Rela *rel, *relend;
822 struct elf_lm32_link_hash_table *htab = lm32_elf_hash_table (info);
824 bfd_vma *local_got_offsets;
825 asection *sgot, *splt, *sreloc;
827 dynobj = htab->root.dynobj;
828 local_got_offsets = elf_local_got_offsets (input_bfd);
834 symtab_hdr = &elf_tdata (input_bfd)->symtab_hdr;
835 sym_hashes = elf_sym_hashes (input_bfd);
838 relend = relocs + input_section->reloc_count;
839 for (; rel < relend; rel++)
841 reloc_howto_type *howto;
843 unsigned long r_symndx;
844 Elf_Internal_Sym *sym;
846 struct elf_link_hash_entry *h;
849 bfd_reloc_status_type r;
850 const char *name = NULL;
853 r_symndx = ELF32_R_SYM (rel->r_info);
854 r_type = ELF32_R_TYPE (rel->r_info);
856 if (r_type == R_LM32_GNU_VTENTRY
857 || r_type == R_LM32_GNU_VTINHERIT )
864 howto = lm32_elf_howto_table + r_type;
866 if (r_symndx < symtab_hdr->sh_info)
868 /* It's a local symbol. */
869 sym = local_syms + r_symndx;
870 osec = sec = local_sections[r_symndx];
871 relocation = _bfd_elf_rela_local_sym (output_bfd, sym, &sec, rel);
872 name = bfd_elf_string_from_elf_section
873 (input_bfd, symtab_hdr->sh_link, sym->st_name);
874 name = (name == NULL) ? bfd_section_name (input_bfd, sec) : name;
878 /* It's a global symbol. */
879 bfd_boolean unresolved_reloc;
882 RELOC_FOR_GLOBAL_SYMBOL (info, input_bfd, input_section, rel,
883 r_symndx, symtab_hdr, sym_hashes,
885 unresolved_reloc, warned);
887 name = h->root.root.string;
890 if (sec != NULL && elf_discarded_section (sec))
892 /* For relocs against symbols from removed linkonce sections,
893 or sections discarded by a linker script, we just want the
894 section contents zeroed. Avoid any special processing. */
895 _bfd_clear_contents (howto, input_bfd, contents + rel->r_offset);
901 if (info->relocatable)
903 /* This is a relocatable link. We don't have to change
904 anything, unless the reloc is against a section symbol,
905 in which case we have to adjust according to where the
906 section symbol winds up in the output section. */
907 if (sym == NULL || ELF_ST_TYPE (sym->st_info) != STT_SECTION)
910 /* If partial_inplace, we need to store any additional addend
911 back in the section. */
912 if (! howto->partial_inplace)
915 /* Shouldn't reach here. */
924 if (!lm32_elf_assign_gp (output_bfd, &gp))
925 r = bfd_reloc_dangerous;
928 relocation = relocation + rel->r_addend - gp;
930 if ((signed)relocation < -32768 || (signed)relocation > 32767)
931 r = bfd_reloc_outofrange;
934 r = _bfd_final_link_relocate (howto, input_bfd,
935 input_section, contents,
936 rel->r_offset, relocation,
942 /* Relocation is to the entry for this symbol in the global
944 BFD_ASSERT (sgot != NULL);
951 BFD_ASSERT (off != (bfd_vma) -1);
953 dyn = htab->root.dynamic_sections_created;
954 if (! WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, info->shared, h)
961 /* This is actually a static link, or it is a
962 -Bsymbolic link and the symbol is defined
963 locally, or the symbol was forced to be local
964 because of a version file. We must initialize
965 this entry in the global offset table. Since the
966 offset must always be a multiple of 4, we use the
967 least significant bit to record whether we have
968 initialized it already.
970 When doing a dynamic link, we create a .rela.got
971 relocation entry to initialize the value. This
972 is done in the finish_dynamic_symbol routine. */
977 /* Write entry in GOT */
978 bfd_put_32 (output_bfd, relocation,
979 sgot->contents + off);
980 /* Create entry in .rofixup pointing to GOT entry. */
981 if (IS_FDPIC (output_bfd) && h->root.type != bfd_link_hash_undefweak)
983 _lm32fdpic_add_rofixup (output_bfd,
984 lm32fdpic_fixup32_section
986 sgot->output_section->vma
987 + sgot->output_offset
990 /* Mark GOT entry as having been written. */
995 relocation = sgot->output_offset + off;
1002 BFD_ASSERT (local_got_offsets != NULL
1003 && local_got_offsets[r_symndx] != (bfd_vma) -1);
1005 /* Get offset into GOT table. */
1006 off = local_got_offsets[r_symndx];
1008 /* The offset must always be a multiple of 4. We use
1009 the least significant bit to record whether we have
1010 already processed this entry. */
1015 /* Write entry in GOT. */
1016 bfd_put_32 (output_bfd, relocation, sgot->contents + off);
1017 /* Create entry in .rofixup pointing to GOT entry. */
1018 if (IS_FDPIC (output_bfd))
1020 _lm32fdpic_add_rofixup (output_bfd,
1021 lm32fdpic_fixup32_section
1023 sgot->output_section->vma
1024 + sgot->output_offset
1031 Elf_Internal_Rela outrel;
1033 /* We need to generate a R_LM32_RELATIVE reloc
1034 for the dynamic linker. */
1035 srelgot = bfd_get_section_by_name (dynobj, ".rela.got");
1036 BFD_ASSERT (srelgot != NULL);
1038 outrel.r_offset = (sgot->output_section->vma
1039 + sgot->output_offset
1041 outrel.r_info = ELF32_R_INFO (0, R_LM32_RELATIVE);
1042 outrel.r_addend = relocation;
1043 loc = srelgot->contents;
1044 loc += srelgot->reloc_count * sizeof (Elf32_External_Rela);
1045 bfd_elf32_swap_reloca_out (output_bfd, &outrel,loc);
1046 ++srelgot->reloc_count;
1049 local_got_offsets[r_symndx] |= 1;
1053 relocation = sgot->output_offset + off;
1056 /* Addend should be zero. */
1057 if (rel->r_addend != 0)
1058 (*_bfd_error_handler) (_("internal error: addend should be zero for R_LM32_16_GOT"));
1060 r = _bfd_final_link_relocate (howto,
1069 case R_LM32_GOTOFF_LO16:
1070 case R_LM32_GOTOFF_HI16:
1071 /* Relocation is offset from GOT. */
1072 BFD_ASSERT (sgot != NULL);
1073 relocation -= sgot->output_section->vma;
1074 /* Account for sign-extension. */
1075 if ((r_type == R_LM32_GOTOFF_HI16)
1076 && ((relocation + rel->r_addend) & 0x8000))
1077 rel->r_addend += 0x10000;
1078 r = _bfd_final_link_relocate (howto,
1088 if (IS_FDPIC (output_bfd))
1090 if ((!h) || (h && h->root.type != bfd_link_hash_undefweak))
1092 /* Only create .rofixup entries for relocs in loadable sections. */
1093 if ((bfd_get_section_flags (output_bfd, input_section->output_section)
1094 & (SEC_ALLOC | SEC_LOAD)) == (SEC_ALLOC | SEC_LOAD))
1097 /* Check address to be modified is writable. */
1098 if (_lm32fdpic_osec_readonly_p (output_bfd,
1102 info->callbacks->warning
1104 _("cannot emit dynamic relocations in read-only section"),
1105 name, input_bfd, input_section, rel->r_offset);
1108 /* Create entry in .rofixup section. */
1109 _lm32fdpic_add_rofixup (output_bfd,
1110 lm32fdpic_fixup32_section (info),
1111 input_section->output_section->vma
1112 + input_section->output_offset
1120 r = _bfd_final_link_relocate (howto,
1131 if (r != bfd_reloc_ok)
1134 const char *msg = NULL;
1136 reloc_howto_type *howto;
1138 lm32_info_to_howto_rela (input_bfd, &bfd_reloc, rel);
1139 howto = bfd_reloc.howto;
1142 name = h->root.root.string;
1145 name = (bfd_elf_string_from_elf_section
1146 (input_bfd, symtab_hdr->sh_link, sym->st_name));
1147 if (name == NULL || *name == '\0')
1148 name = bfd_section_name (input_bfd, sec);
1153 case bfd_reloc_overflow:
1155 && (h->root.type == bfd_link_hash_undefweak))
1157 if (! ((*info->callbacks->reloc_overflow)
1158 (info, (h ? &h->root : NULL), name, howto->name,
1159 (bfd_vma) 0, input_bfd, input_section, rel->r_offset)))
1163 case bfd_reloc_undefined:
1164 if (! ((*info->callbacks->undefined_symbol)
1165 (info, name, input_bfd, input_section,
1166 rel->r_offset, TRUE)))
1170 case bfd_reloc_outofrange:
1171 msg = _("internal error: out of range error");
1174 case bfd_reloc_notsupported:
1175 msg = _("internal error: unsupported relocation error");
1178 case bfd_reloc_dangerous:
1179 msg = _("internal error: dangerous error");
1183 msg = _("internal error: unknown error");
1187 if (!((*info->callbacks->warning)
1188 (info, msg, name, input_bfd, input_section,
1200 lm32_elf_gc_mark_hook (asection *sec,
1201 struct bfd_link_info *info,
1202 Elf_Internal_Rela *rel,
1203 struct elf_link_hash_entry *h,
1204 Elf_Internal_Sym *sym)
1207 switch (ELF32_R_TYPE (rel->r_info))
1209 case R_LM32_GNU_VTINHERIT:
1210 case R_LM32_GNU_VTENTRY:
1214 return _bfd_elf_gc_mark_hook (sec, info, rel, h, sym);
1218 lm32_elf_gc_sweep_hook (bfd *abfd,
1219 struct bfd_link_info *info ATTRIBUTE_UNUSED,
1221 const Elf_Internal_Rela *relocs ATTRIBUTE_UNUSED)
1223 /* Update the got entry reference counts for the section being removed. */
1224 Elf_Internal_Shdr *symtab_hdr;
1225 struct elf_link_hash_entry **sym_hashes;
1226 bfd_signed_vma *local_got_refcounts;
1227 const Elf_Internal_Rela *rel, *relend;
1229 elf_section_data (sec)->local_dynrel = NULL;
1231 symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
1232 sym_hashes = elf_sym_hashes (abfd);
1233 local_got_refcounts = elf_local_got_refcounts (abfd);
1235 relend = relocs + sec->reloc_count;
1236 for (rel = relocs; rel < relend; rel++)
1238 unsigned long r_symndx;
1239 struct elf_link_hash_entry *h = NULL;
1241 r_symndx = ELF32_R_SYM (rel->r_info);
1242 if (r_symndx >= symtab_hdr->sh_info)
1244 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
1245 while (h->root.type == bfd_link_hash_indirect
1246 || h->root.type == bfd_link_hash_warning)
1247 h = (struct elf_link_hash_entry *) h->root.u.i.link;
1250 switch (ELF32_R_TYPE (rel->r_info))
1255 if (h->got.refcount > 0)
1260 if (local_got_refcounts && local_got_refcounts[r_symndx] > 0)
1261 local_got_refcounts[r_symndx]--;
1272 /* Look through the relocs for a section during the first phase. */
1275 lm32_elf_check_relocs (bfd *abfd,
1276 struct bfd_link_info *info,
1278 const Elf_Internal_Rela *relocs)
1280 Elf_Internal_Shdr *symtab_hdr;
1281 struct elf_link_hash_entry **sym_hashes, **sym_hashes_end;
1282 const Elf_Internal_Rela *rel;
1283 const Elf_Internal_Rela *rel_end;
1284 struct elf_lm32_link_hash_table *htab;
1286 bfd_vma *local_got_offsets;
1287 asection *sgot, *srelgot, *sreloc;
1289 if (info->relocatable)
1292 sgot = srelgot = sreloc = NULL;
1294 symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
1295 sym_hashes = elf_sym_hashes (abfd);
1296 sym_hashes_end = sym_hashes + symtab_hdr->sh_size/sizeof (Elf32_External_Sym);
1297 if (!elf_bad_symtab (abfd))
1298 sym_hashes_end -= symtab_hdr->sh_info;
1300 htab = lm32_elf_hash_table (info);
1301 dynobj = htab->root.dynobj;
1302 local_got_offsets = elf_local_got_offsets (abfd);
1304 rel_end = relocs + sec->reloc_count;
1305 for (rel = relocs; rel < rel_end; rel++)
1308 struct elf_link_hash_entry *h;
1309 unsigned long r_symndx;
1311 r_symndx = ELF32_R_SYM (rel->r_info);
1312 r_type = ELF32_R_TYPE (rel->r_info);
1313 if (r_symndx < symtab_hdr->sh_info)
1317 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
1318 while (h->root.type == bfd_link_hash_indirect
1319 || h->root.type == bfd_link_hash_warning)
1320 h = (struct elf_link_hash_entry *) h->root.u.i.link;
1323 /* Some relocs require a global offset table. */
1324 if (htab->sgot == NULL)
1329 case R_LM32_GOTOFF_HI16:
1330 case R_LM32_GOTOFF_LO16:
1332 htab->root.dynobj = dynobj = abfd;
1333 if (! create_got_section (dynobj, info))
1339 /* Some relocs require a rofixup table. */
1340 if (IS_FDPIC (abfd))
1345 /* FDPIC requires a GOT if there is a .rofixup section
1346 (Normal ELF doesn't). */
1348 htab->root.dynobj = dynobj = abfd;
1349 if (! create_got_section (dynobj, info))
1351 /* Create .rofixup section */
1352 if (htab->sfixup32 == NULL)
1354 if (! create_rofixup_section (abfd, info))
1359 case R_LM32_GOTOFF_HI16:
1360 case R_LM32_GOTOFF_LO16:
1361 /* Create .rofixup section. */
1362 if (htab->sfixup32 == NULL)
1364 if (! create_rofixup_section (abfd, info))
1375 h->got.refcount += 1;
1378 bfd_signed_vma *local_got_refcounts;
1380 /* This is a global offset table entry for a local symbol. */
1381 local_got_refcounts = elf_local_got_refcounts (abfd);
1382 if (local_got_refcounts == NULL)
1386 size = symtab_hdr->sh_info;
1387 size *= sizeof (bfd_signed_vma);
1388 local_got_refcounts = bfd_zalloc (abfd, size);
1389 if (local_got_refcounts == NULL)
1391 elf_local_got_refcounts (abfd) = local_got_refcounts;
1393 local_got_refcounts[r_symndx] += 1;
1397 /* This relocation describes the C++ object vtable hierarchy.
1398 Reconstruct it for later use during GC. */
1399 case R_LM32_GNU_VTINHERIT:
1400 if (!bfd_elf_gc_record_vtinherit (abfd, sec, h, rel->r_offset))
1404 /* This relocation describes which C++ vtable entries are actually
1405 used. Record for later use during GC. */
1406 case R_LM32_GNU_VTENTRY:
1407 if (!bfd_elf_gc_record_vtentry (abfd, sec, h, rel->r_addend))
1417 /* Finish up the dynamic sections. */
1420 lm32_elf_finish_dynamic_sections (bfd *output_bfd,
1421 struct bfd_link_info *info)
1423 struct elf_lm32_link_hash_table *htab;
1428 htab = lm32_elf_hash_table (info);
1429 dynobj = htab->root.dynobj;
1431 sgot = htab->sgotplt;
1432 sdyn = bfd_get_section_by_name (dynobj, ".dynamic");
1434 if (htab->root.dynamic_sections_created)
1437 Elf32_External_Dyn *dyncon, *dynconend;
1439 BFD_ASSERT (sgot != NULL && sdyn != NULL);
1441 dyncon = (Elf32_External_Dyn *) sdyn->contents;
1442 dynconend = (Elf32_External_Dyn *) (sdyn->contents + sdyn->size);
1444 for (; dyncon < dynconend; dyncon++)
1446 Elf_Internal_Dyn dyn;
1450 bfd_elf32_swap_dyn_in (dynobj, dyncon, &dyn);
1459 s = htab->sgot->output_section;
1463 s = htab->srelplt->output_section;
1465 BFD_ASSERT (s != NULL);
1466 dyn.d_un.d_ptr = s->vma;
1467 bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon);
1471 s = htab->srelplt->output_section;
1472 BFD_ASSERT (s != NULL);
1473 dyn.d_un.d_val = s->size;
1474 bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon);
1478 /* My reading of the SVR4 ABI indicates that the
1479 procedure linkage table relocs (DT_JMPREL) should be
1480 included in the overall relocs (DT_RELA). This is
1481 what Solaris does. However, UnixWare can not handle
1482 that case. Therefore, we override the DT_RELASZ entry
1483 here to make it not include the JMPREL relocs. Since
1484 the linker script arranges for .rela.plt to follow all
1485 other relocation sections, we don't have to worry
1486 about changing the DT_RELA entry. */
1487 if (htab->srelplt != NULL)
1489 s = htab->srelplt->output_section;
1490 dyn.d_un.d_val -= s->size;
1492 bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon);
1497 /* Fill in the first entry in the procedure linkage table. */
1499 if (splt && splt->size > 0)
1503 bfd_put_32 (output_bfd, PLT0_PIC_ENTRY_WORD0, splt->contents);
1504 bfd_put_32 (output_bfd, PLT0_PIC_ENTRY_WORD1, splt->contents + 4);
1505 bfd_put_32 (output_bfd, PLT0_PIC_ENTRY_WORD2, splt->contents + 8);
1506 bfd_put_32 (output_bfd, PLT0_PIC_ENTRY_WORD3, splt->contents + 12);
1507 bfd_put_32 (output_bfd, PLT0_PIC_ENTRY_WORD4, splt->contents + 16);
1512 /* addr = .got + 4 */
1513 addr = sgot->output_section->vma + sgot->output_offset + 4;
1514 bfd_put_32 (output_bfd,
1515 PLT0_ENTRY_WORD0 | ((addr >> 16) & 0xffff),
1517 bfd_put_32 (output_bfd,
1518 PLT0_ENTRY_WORD1 | (addr & 0xffff),
1519 splt->contents + 4);
1520 bfd_put_32 (output_bfd, PLT0_ENTRY_WORD2, splt->contents + 8);
1521 bfd_put_32 (output_bfd, PLT0_ENTRY_WORD3, splt->contents + 12);
1522 bfd_put_32 (output_bfd, PLT0_ENTRY_WORD4, splt->contents + 16);
1525 elf_section_data (splt->output_section)->this_hdr.sh_entsize =
1530 /* Fill in the first three entries in the global offset table. */
1531 if (sgot && sgot->size > 0)
1534 bfd_put_32 (output_bfd, (bfd_vma) 0, sgot->contents);
1536 bfd_put_32 (output_bfd,
1537 sdyn->output_section->vma + sdyn->output_offset,
1539 bfd_put_32 (output_bfd, (bfd_vma) 0, sgot->contents + 4);
1540 bfd_put_32 (output_bfd, (bfd_vma) 0, sgot->contents + 8);
1542 /* FIXME: This can be null if create_dynamic_sections wasn't called. */
1543 if (elf_section_data (sgot->output_section) != NULL)
1544 elf_section_data (sgot->output_section)->this_hdr.sh_entsize = 4;
1547 if (lm32fdpic_fixup32_section (info))
1549 struct elf_link_hash_entry *hgot = elf_hash_table (info)->hgot;
1550 bfd_vma got_value = hgot->root.u.def.value
1551 + hgot->root.u.def.section->output_section->vma
1552 + hgot->root.u.def.section->output_offset;
1553 struct bfd_link_hash_entry *hend;
1555 /* Last entry is pointer to GOT. */
1556 _lm32fdpic_add_rofixup (output_bfd, lm32fdpic_fixup32_section (info), got_value);
1558 /* Check we wrote enough entries. */
1559 if (lm32fdpic_fixup32_section (info)->size
1560 != (lm32fdpic_fixup32_section (info)->reloc_count * 4))
1562 (*_bfd_error_handler)
1563 ("LINKER BUG: .rofixup section size mismatch: size/4 %d != relocs %d",
1564 lm32fdpic_fixup32_section (info)->size/4,
1565 lm32fdpic_fixup32_section (info)->reloc_count);
1569 hend = bfd_link_hash_lookup (info->hash, "__ROFIXUP_END__",
1570 FALSE, FALSE, TRUE);
1572 && (hend->type == bfd_link_hash_defined
1573 || hend->type == bfd_link_hash_defweak))
1576 lm32fdpic_fixup32_section (info)->output_section->vma
1577 + lm32fdpic_fixup32_section (info)->output_offset
1578 + lm32fdpic_fixup32_section (info)->size
1579 - hend->u.def.section->output_section->vma
1580 - hend->u.def.section->output_offset;
1581 BFD_ASSERT (hend->u.def.value == value);
1582 if (hend->u.def.value != value)
1584 (*_bfd_error_handler)
1585 ("LINKER BUG: .rofixup section hend->u.def.value != value: %ld != %ld", hend->u.def.value, value);
1594 /* Finish up dynamic symbol handling. We set the contents of various
1595 dynamic sections here. */
1598 lm32_elf_finish_dynamic_symbol (bfd *output_bfd,
1599 struct bfd_link_info *info,
1600 struct elf_link_hash_entry *h,
1601 Elf_Internal_Sym *sym)
1603 struct elf_lm32_link_hash_table *htab;
1607 htab = lm32_elf_hash_table (info);
1608 dynobj = htab->root.dynobj;
1610 if (h->plt.offset != (bfd_vma) -1)
1618 Elf_Internal_Rela rela;
1620 /* This symbol has an entry in the procedure linkage table. Set
1622 BFD_ASSERT (h->dynindx != -1);
1625 sgot = htab->sgotplt;
1626 srela = htab->srelplt;
1627 BFD_ASSERT (splt != NULL && sgot != NULL && srela != NULL);
1629 /* Get the index in the procedure linkage table which
1630 corresponds to this symbol. This is the index of this symbol
1631 in all the symbols for which we are making plt entries. The
1632 first entry in the procedure linkage table is reserved. */
1633 plt_index = h->plt.offset / PLT_ENTRY_SIZE - 1;
1635 /* Get the offset into the .got table of the entry that
1636 corresponds to this function. Each .got entry is 4 bytes.
1637 The first three are reserved. */
1638 got_offset = (plt_index + 3) * 4;
1640 /* Fill in the entry in the procedure linkage table. */
1650 /* Fill in the entry in the global offset table. */
1651 bfd_put_32 (output_bfd,
1652 (splt->output_section->vma
1653 + splt->output_offset
1655 + 12), /* same offset */
1656 sgot->contents + got_offset);
1658 /* Fill in the entry in the .rela.plt section. */
1659 rela.r_offset = (sgot->output_section->vma
1660 + sgot->output_offset
1662 rela.r_info = ELF32_R_INFO (h->dynindx, R_LM32_JMP_SLOT);
1664 loc = srela->contents;
1665 loc += plt_index * sizeof (Elf32_External_Rela);
1666 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
1668 if (!h->def_regular)
1670 /* Mark the symbol as undefined, rather than as defined in
1671 the .plt section. Leave the value alone. */
1672 sym->st_shndx = SHN_UNDEF;
1677 if (h->got.offset != (bfd_vma) -1)
1681 Elf_Internal_Rela rela;
1683 /* This symbol has an entry in the global offset table. Set it
1686 srela = htab->srelgot;
1687 BFD_ASSERT (sgot != NULL && srela != NULL);
1689 rela.r_offset = (sgot->output_section->vma
1690 + sgot->output_offset
1691 + (h->got.offset &~ 1));
1693 /* If this is a -Bsymbolic link, and the symbol is defined
1694 locally, we just want to emit a RELATIVE reloc. Likewise if
1695 the symbol was forced to be local because of a version file.
1696 The entry in the global offset table will already have been
1697 initialized in the relocate_section function. */
1704 rela.r_info = ELF32_R_INFO (0, R_LM32_RELATIVE);
1705 rela.r_addend = (h->root.u.def.value
1706 + h->root.u.def.section->output_section->vma
1707 + h->root.u.def.section->output_offset);
1711 BFD_ASSERT ((h->got.offset & 1) == 0);
1712 bfd_put_32 (output_bfd, (bfd_vma) 0, sgot->contents + h->got.offset);
1713 rela.r_info = ELF32_R_INFO (h->dynindx, R_LM32_GLOB_DAT);
1717 loc = srela->contents;
1718 loc += srela->reloc_count * sizeof (Elf32_External_Rela);
1719 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
1720 ++srela->reloc_count;
1726 Elf_Internal_Rela rela;
1728 /* This symbols needs a copy reloc. Set it up. */
1729 BFD_ASSERT (h->dynindx != -1
1730 && (h->root.type == bfd_link_hash_defined
1731 || h->root.type == bfd_link_hash_defweak));
1733 s = bfd_get_section_by_name (h->root.u.def.section->owner,
1735 BFD_ASSERT (s != NULL);
1737 rela.r_offset = (h->root.u.def.value
1738 + h->root.u.def.section->output_section->vma
1739 + h->root.u.def.section->output_offset);
1740 rela.r_info = ELF32_R_INFO (h->dynindx, R_LM32_COPY);
1743 loc += s->reloc_count * sizeof (Elf32_External_Rela);
1744 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
1748 /* Mark some specially defined symbols as absolute. */
1749 if (strcmp (h->root.root.string, "_DYNAMIC") == 0
1750 || h == htab->root.hgot)
1751 sym->st_shndx = SHN_ABS;
1756 static enum elf_reloc_type_class
1757 lm32_elf_reloc_type_class (const Elf_Internal_Rela *rela)
1759 switch ((int) ELF32_R_TYPE (rela->r_info))
1761 case R_LM32_RELATIVE: return reloc_class_relative;
1762 case R_LM32_JMP_SLOT: return reloc_class_plt;
1763 case R_LM32_COPY: return reloc_class_copy;
1764 default: return reloc_class_normal;
1768 /* Adjust a symbol defined by a dynamic object and referenced by a
1769 regular object. The current definition is in some section of the
1770 dynamic object, but we're not including those sections. We have to
1771 change the definition to something the rest of the link can
1775 lm32_elf_adjust_dynamic_symbol (struct bfd_link_info *info,
1776 struct elf_link_hash_entry *h)
1778 struct elf_lm32_link_hash_table *htab;
1779 struct elf_lm32_link_hash_entry *eh;
1780 struct elf_lm32_dyn_relocs *p;
1784 dynobj = elf_hash_table (info)->dynobj;
1786 /* Make sure we know what is going on here. */
1787 BFD_ASSERT (dynobj != NULL
1789 || h->u.weakdef != NULL
1792 && !h->def_regular)));
1794 /* If this is a function, put it in the procedure linkage table. We
1795 will fill in the contents of the procedure linkage table later,
1796 when we know the address of the .got section. */
1797 if (h->type == STT_FUNC
1803 && h->root.type != bfd_link_hash_undefweak
1804 && h->root.type != bfd_link_hash_undefined)
1806 /* This case can occur if we saw a PLT reloc in an input
1807 file, but the symbol was never referred to by a dynamic
1808 object. In such a case, we don't actually need to build
1809 a procedure linkage table, and we can just do a PCREL
1811 h->plt.offset = (bfd_vma) -1;
1818 h->plt.offset = (bfd_vma) -1;
1820 /* If this is a weak symbol, and there is a real definition, the
1821 processor independent code will have arranged for us to see the
1822 real definition first, and we can just use the same value. */
1823 if (h->u.weakdef != NULL)
1825 BFD_ASSERT (h->u.weakdef->root.type == bfd_link_hash_defined
1826 || h->u.weakdef->root.type == bfd_link_hash_defweak);
1827 h->root.u.def.section = h->u.weakdef->root.u.def.section;
1828 h->root.u.def.value = h->u.weakdef->root.u.def.value;
1832 /* This is a reference to a symbol defined by a dynamic object which
1833 is not a function. */
1835 /* If we are creating a shared library, we must presume that the
1836 only references to the symbol are via the global offset table.
1837 For such cases we need not do anything here; the relocations will
1838 be handled correctly by relocate_section. */
1842 /* If there are no references to this symbol that do not use the
1843 GOT, we don't need to generate a copy reloc. */
1844 if (!h->non_got_ref)
1847 /* If -z nocopyreloc was given, we won't generate them either. */
1848 if (info->nocopyreloc)
1854 eh = (struct elf_lm32_link_hash_entry *) h;
1855 for (p = eh->dyn_relocs; p != NULL; p = p->next)
1857 s = p->sec->output_section;
1858 if (s != NULL && (s->flags & (SEC_READONLY | SEC_HAS_CONTENTS)) != 0)
1862 /* If we didn't find any dynamic relocs in sections which needs the
1863 copy reloc, then we'll be keeping the dynamic relocs and avoiding
1873 (*_bfd_error_handler) (_("dynamic variable `%s' is zero size"),
1874 h->root.root.string);
1878 /* We must allocate the symbol in our .dynbss section, which will
1879 become part of the .bss section of the executable. There will be
1880 an entry for this symbol in the .dynsym section. The dynamic
1881 object will contain position independent code, so all references
1882 from the dynamic object to this symbol will go through the global
1883 offset table. The dynamic linker will use the .dynsym entry to
1884 determine the address it must put in the global offset table, so
1885 both the dynamic object and the regular object will refer to the
1886 same memory location for the variable. */
1888 htab = lm32_elf_hash_table (info);
1890 BFD_ASSERT (s != NULL);
1892 /* We must generate a R_LM32_COPY reloc to tell the dynamic linker
1893 to copy the initial value out of the dynamic object and into the
1894 runtime process image. We need to remember the offset into the
1895 .rela.bss section we are going to use. */
1896 if ((h->root.u.def.section->flags & SEC_ALLOC) != 0)
1900 srel = htab->srelbss;
1901 BFD_ASSERT (srel != NULL);
1902 srel->size += sizeof (Elf32_External_Rela);
1906 return _bfd_elf_adjust_dynamic_copy (h, s);
1909 /* Allocate space in .plt, .got and associated reloc sections for
1913 allocate_dynrelocs (struct elf_link_hash_entry *h, void * inf)
1915 struct bfd_link_info *info;
1916 struct elf_lm32_link_hash_table *htab;
1917 struct elf_lm32_link_hash_entry *eh;
1918 struct elf_lm32_dyn_relocs *p;
1920 if (h->root.type == bfd_link_hash_indirect)
1923 if (h->root.type == bfd_link_hash_warning)
1924 /* When warning symbols are created, they **replace** the "real"
1925 entry in the hash table, thus we never get to see the real
1926 symbol in a hash traversal. So look at it now. */
1927 h = (struct elf_link_hash_entry *) h->root.u.i.link;
1929 info = (struct bfd_link_info *) inf;
1930 htab = lm32_elf_hash_table (info);
1932 eh = (struct elf_lm32_link_hash_entry *) h;
1934 if (htab->root.dynamic_sections_created
1935 && h->plt.refcount > 0)
1937 /* Make sure this symbol is output as a dynamic symbol.
1938 Undefined weak syms won't yet be marked as dynamic. */
1939 if (h->dynindx == -1
1940 && !h->forced_local)
1942 if (! bfd_elf_link_record_dynamic_symbol (info, h))
1946 if (WILL_CALL_FINISH_DYNAMIC_SYMBOL (1, info->shared, h))
1948 asection *s = htab->splt;
1950 /* If this is the first .plt entry, make room for the special
1953 s->size += PLT_ENTRY_SIZE;
1955 h->plt.offset = s->size;
1957 /* If this symbol is not defined in a regular file, and we are
1958 not generating a shared library, then set the symbol to this
1959 location in the .plt. This is required to make function
1960 pointers compare as equal between the normal executable and
1961 the shared library. */
1965 h->root.u.def.section = s;
1966 h->root.u.def.value = h->plt.offset;
1969 /* Make room for this entry. */
1970 s->size += PLT_ENTRY_SIZE;
1972 /* We also need to make an entry in the .got.plt section, which
1973 will be placed in the .got section by the linker script. */
1974 htab->sgotplt->size += 4;
1976 /* We also need to make an entry in the .rel.plt section. */
1977 htab->srelplt->size += sizeof (Elf32_External_Rela);
1981 h->plt.offset = (bfd_vma) -1;
1987 h->plt.offset = (bfd_vma) -1;
1991 if (h->got.refcount > 0)
1996 /* Make sure this symbol is output as a dynamic symbol.
1997 Undefined weak syms won't yet be marked as dynamic. */
1998 if (h->dynindx == -1
1999 && !h->forced_local)
2001 if (! bfd_elf_link_record_dynamic_symbol (info, h))
2007 h->got.offset = s->size;
2009 dyn = htab->root.dynamic_sections_created;
2010 if (WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, info->shared, h))
2011 htab->srelgot->size += sizeof (Elf32_External_Rela);
2014 h->got.offset = (bfd_vma) -1;
2016 if (eh->dyn_relocs == NULL)
2019 /* In the shared -Bsymbolic case, discard space allocated for
2020 dynamic pc-relative relocs against symbols which turn out to be
2021 defined in regular objects. For the normal shared case, discard
2022 space for pc-relative relocs that have become local due to symbol
2023 visibility changes. */
2031 struct elf_lm32_dyn_relocs **pp;
2033 for (pp = &eh->dyn_relocs; (p = *pp) != NULL;)
2035 p->count -= p->pc_count;
2044 /* Also discard relocs on undefined weak syms with non-default
2046 if (eh->dyn_relocs != NULL
2047 && h->root.type == bfd_link_hash_undefweak)
2049 if (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT)
2050 eh->dyn_relocs = NULL;
2052 /* Make sure undefined weak symbols are output as a dynamic
2054 else if (h->dynindx == -1
2055 && !h->forced_local)
2057 if (! bfd_elf_link_record_dynamic_symbol (info, h))
2064 /* For the non-shared case, discard space for relocs against
2065 symbols which turn out to need copy relocs or are not
2071 || (htab->root.dynamic_sections_created
2072 && (h->root.type == bfd_link_hash_undefweak
2073 || h->root.type == bfd_link_hash_undefined))))
2075 /* Make sure this symbol is output as a dynamic symbol.
2076 Undefined weak syms won't yet be marked as dynamic. */
2077 if (h->dynindx == -1
2078 && !h->forced_local)
2080 if (! bfd_elf_link_record_dynamic_symbol (info, h))
2084 /* If that succeeded, we know we'll be keeping all the
2086 if (h->dynindx != -1)
2090 eh->dyn_relocs = NULL;
2095 /* Finally, allocate space. */
2096 for (p = eh->dyn_relocs; p != NULL; p = p->next)
2098 asection *sreloc = elf_section_data (p->sec)->sreloc;
2099 sreloc->size += p->count * sizeof (Elf32_External_Rela);
2105 /* Find any dynamic relocs that apply to read-only sections. */
2108 readonly_dynrelocs (struct elf_link_hash_entry *h, void * inf)
2110 struct elf_lm32_link_hash_entry *eh;
2111 struct elf_lm32_dyn_relocs *p;
2113 if (h->root.type == bfd_link_hash_warning)
2114 h = (struct elf_link_hash_entry *) h->root.u.i.link;
2116 eh = (struct elf_lm32_link_hash_entry *) h;
2117 for (p = eh->dyn_relocs; p != NULL; p = p->next)
2119 asection *s = p->sec->output_section;
2121 if (s != NULL && (s->flags & SEC_READONLY) != 0)
2123 struct bfd_link_info *info = (struct bfd_link_info *) inf;
2125 info->flags |= DF_TEXTREL;
2127 /* Not an error, just cut short the traversal. */
2134 /* Set the sizes of the dynamic sections. */
2137 lm32_elf_size_dynamic_sections (bfd *output_bfd,
2138 struct bfd_link_info *info)
2140 struct elf_lm32_link_hash_table *htab;
2146 htab = lm32_elf_hash_table (info);
2147 dynobj = htab->root.dynobj;
2148 BFD_ASSERT (dynobj != NULL);
2150 if (htab->root.dynamic_sections_created)
2152 /* Set the contents of the .interp section to the interpreter. */
2153 if (info->executable)
2155 s = bfd_get_section_by_name (dynobj, ".interp");
2156 BFD_ASSERT (s != NULL);
2157 s->size = sizeof ELF_DYNAMIC_INTERPRETER;
2158 s->contents = (unsigned char *) ELF_DYNAMIC_INTERPRETER;
2162 /* Set up .got offsets for local syms, and space for local dynamic
2164 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next)
2166 bfd_signed_vma *local_got;
2167 bfd_signed_vma *end_local_got;
2168 bfd_size_type locsymcount;
2169 Elf_Internal_Shdr *symtab_hdr;
2172 if (bfd_get_flavour (ibfd) != bfd_target_elf_flavour)
2175 for (s = ibfd->sections; s != NULL; s = s->next)
2177 struct elf_lm32_dyn_relocs *p;
2179 for (p = ((struct elf_lm32_dyn_relocs *)
2180 elf_section_data (s)->local_dynrel);
2184 if (! bfd_is_abs_section (p->sec)
2185 && bfd_is_abs_section (p->sec->output_section))
2187 /* Input section has been discarded, either because
2188 it is a copy of a linkonce section or due to
2189 linker script /DISCARD/, so we'll be discarding
2192 else if (p->count != 0)
2194 srel = elf_section_data (p->sec)->sreloc;
2195 srel->size += p->count * sizeof (Elf32_External_Rela);
2196 if ((p->sec->output_section->flags & SEC_READONLY) != 0)
2197 info->flags |= DF_TEXTREL;
2202 local_got = elf_local_got_refcounts (ibfd);
2206 symtab_hdr = &elf_tdata (ibfd)->symtab_hdr;
2207 locsymcount = symtab_hdr->sh_info;
2208 end_local_got = local_got + locsymcount;
2210 srel = htab->srelgot;
2211 for (; local_got < end_local_got; ++local_got)
2215 *local_got = s->size;
2218 srel->size += sizeof (Elf32_External_Rela);
2221 *local_got = (bfd_vma) -1;
2225 /* Allocate global sym .plt and .got entries, and space for global
2226 sym dynamic relocs. */
2227 elf_link_hash_traverse (&htab->root, allocate_dynrelocs, info);
2229 /* We now have determined the sizes of the various dynamic sections.
2230 Allocate memory for them. */
2232 for (s = dynobj->sections; s != NULL; s = s->next)
2234 if ((s->flags & SEC_LINKER_CREATED) == 0)
2239 || s == htab->sgotplt
2240 || s == htab->sdynbss)
2242 /* Strip this section if we don't need it; see the
2245 else if (CONST_STRNEQ (bfd_get_section_name (dynobj, s), ".rela"))
2247 if (s->size != 0 && s != htab->srelplt)
2250 /* We use the reloc_count field as a counter if we need
2251 to copy relocs into the output file. */
2255 /* It's not one of our sections, so don't allocate space. */
2260 /* If we don't need this section, strip it from the
2261 output file. This is mostly to handle .rela.bss and
2262 .rela.plt. We must create both sections in
2263 create_dynamic_sections, because they must be created
2264 before the linker maps input sections to output
2265 sections. The linker does that before
2266 adjust_dynamic_symbol is called, and it is that
2267 function which decides whether anything needs to go
2268 into these sections. */
2269 s->flags |= SEC_EXCLUDE;
2273 if ((s->flags & SEC_HAS_CONTENTS) == 0)
2276 /* Allocate memory for the section contents. We use bfd_zalloc
2277 here in case unused entries are not reclaimed before the
2278 section's contents are written out. This should not happen,
2279 but this way if it does, we get a R_LM32_NONE reloc instead
2281 s->contents = bfd_zalloc (dynobj, s->size);
2282 if (s->contents == NULL)
2286 if (htab->root.dynamic_sections_created)
2288 /* Add some entries to the .dynamic section. We fill in the
2289 values later, in lm32_elf_finish_dynamic_sections, but we
2290 must add the entries now so that we get the correct size for
2291 the .dynamic section. The DT_DEBUG entry is filled in by the
2292 dynamic linker and used by the debugger. */
2293 #define add_dynamic_entry(TAG, VAL) \
2294 _bfd_elf_add_dynamic_entry (info, TAG, VAL)
2296 if (info->executable)
2298 if (! add_dynamic_entry (DT_DEBUG, 0))
2302 if (htab->splt->size != 0)
2304 if (! add_dynamic_entry (DT_PLTGOT, 0)
2305 || ! add_dynamic_entry (DT_PLTRELSZ, 0)
2306 || ! add_dynamic_entry (DT_PLTREL, DT_RELA)
2307 || ! add_dynamic_entry (DT_JMPREL, 0))
2313 if (! add_dynamic_entry (DT_RELA, 0)
2314 || ! add_dynamic_entry (DT_RELASZ, 0)
2315 || ! add_dynamic_entry (DT_RELAENT,
2316 sizeof (Elf32_External_Rela)))
2319 /* If any dynamic relocs apply to a read-only section,
2320 then we need a DT_TEXTREL entry. */
2321 if ((info->flags & DF_TEXTREL) == 0)
2322 elf_link_hash_traverse (&htab->root, readonly_dynrelocs,
2325 if ((info->flags & DF_TEXTREL) != 0)
2327 if (! add_dynamic_entry (DT_TEXTREL, 0))
2332 #undef add_dynamic_entry
2334 /* Allocate .rofixup section. */
2335 if (IS_FDPIC (output_bfd))
2337 struct weak_symbol_list *list_start = NULL, *list_end = NULL;
2338 int rgot_weak_count = 0;
2341 /* Look for deleted sections. */
2342 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next)
2344 for (s = ibfd->sections; s != NULL; s = s->next)
2348 /* Count relocs that need .rofixup entires. */
2349 Elf_Internal_Rela *internal_relocs, *end;
2350 internal_relocs = elf_section_data (s)->relocs;
2351 if (internal_relocs == NULL)
2352 internal_relocs = (_bfd_elf_link_read_relocs (ibfd, s, NULL, NULL, FALSE));
2353 if (internal_relocs != NULL)
2355 end = internal_relocs + s->reloc_count;
2356 while (internal_relocs < end)
2358 Elf_Internal_Shdr *symtab_hdr = &elf_tdata (ibfd)->symtab_hdr;
2359 struct elf_link_hash_entry **sym_hashes = elf_sym_hashes (ibfd);
2360 unsigned long r_symndx;
2361 struct elf_link_hash_entry *h;
2363 symtab_hdr = &elf_tdata (ibfd)->symtab_hdr;
2364 sym_hashes = elf_sym_hashes (ibfd);
2365 r_symndx = ELF32_R_SYM (internal_relocs->r_info);
2367 if (r_symndx < symtab_hdr->sh_info)
2372 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
2373 while (h->root.type == bfd_link_hash_indirect
2374 || h->root.type == bfd_link_hash_warning)
2375 h = (struct elf_link_hash_entry *) h->root.u.i.link;
2378 /* Don't generate entries for weak symbols. */
2379 if (!h || (h && h->root.type != bfd_link_hash_undefweak))
2381 if (!elf_discarded_section (s) && !((bfd_get_section_flags (ibfd, s) & SEC_ALLOC) == 0))
2383 switch (ELF32_R_TYPE (internal_relocs->r_info))
2396 struct weak_symbol_list *current, *new_entry;
2397 /* Is this symbol already in the list? */
2398 for (current = list_start; current; current = current->next)
2400 if (!strcmp (current->name, h->root.root.string))
2403 if (!current && !elf_discarded_section (s) && (bfd_get_section_flags (ibfd, s) & SEC_ALLOC))
2405 /* Will this have an entry in the GOT. */
2406 if (ELF32_R_TYPE (internal_relocs->r_info) == R_LM32_16_GOT)
2408 /* Create a new entry. */
2409 new_entry = malloc (sizeof (struct weak_symbol_list));
2412 new_entry->name = h->root.root.string;
2413 new_entry->next = NULL;
2415 if (list_start == NULL)
2417 list_start = new_entry;
2418 list_end = new_entry;
2422 list_end->next = new_entry;
2423 list_end = new_entry;
2425 /* Increase count of undefined weak symbols in the got. */
2441 list_end = list_start->next;
2443 list_start = list_end;
2446 /* Size sections. */
2447 lm32fdpic_fixup32_section (info)->size = (r32_count + (htab->sgot->size / 4) - rgot_weak_count + 1) * 4;
2448 if (lm32fdpic_fixup32_section (info)->size == 0)
2449 lm32fdpic_fixup32_section (info)->flags |= SEC_EXCLUDE;
2452 lm32fdpic_fixup32_section (info)->contents =
2453 bfd_zalloc (dynobj, lm32fdpic_fixup32_section (info)->size);
2454 if (lm32fdpic_fixup32_section (info)->contents == NULL)
2462 /* Create dynamic sections when linking against a dynamic object. */
2465 lm32_elf_create_dynamic_sections (bfd *abfd, struct bfd_link_info *info)
2467 struct elf_lm32_link_hash_table *htab;
2468 flagword flags, pltflags;
2470 const struct elf_backend_data *bed = get_elf_backend_data (abfd);
2471 int ptralign = 2; /* 32bit */
2473 htab = lm32_elf_hash_table (info);
2475 /* Make sure we have a GOT - For the case where we have a dynamic object
2476 but none of the relocs in check_relocs */
2477 if (! create_got_section (abfd, info))
2479 if (IS_FDPIC (abfd) && (htab->sfixup32 == NULL))
2481 if (! create_rofixup_section (abfd, info))
2485 /* We need to create .plt, .rel[a].plt, .got, .got.plt, .dynbss, and
2486 .rel[a].bss sections. */
2487 flags = (SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS | SEC_IN_MEMORY
2488 | SEC_LINKER_CREATED);
2491 pltflags |= SEC_CODE;
2492 if (bed->plt_not_loaded)
2493 pltflags &= ~ (SEC_LOAD | SEC_HAS_CONTENTS);
2494 if (bed->plt_readonly)
2495 pltflags |= SEC_READONLY;
2497 s = bfd_make_section_with_flags (abfd, ".plt", pltflags);
2500 || ! bfd_set_section_alignment (abfd, s, bed->plt_alignment))
2503 if (bed->want_plt_sym)
2505 /* Define the symbol _PROCEDURE_LINKAGE_TABLE_ at the start of the
2507 struct bfd_link_hash_entry *bh = NULL;
2508 struct elf_link_hash_entry *h;
2510 if (! (_bfd_generic_link_add_one_symbol
2511 (info, abfd, "_PROCEDURE_LINKAGE_TABLE_", BSF_GLOBAL, s,
2512 (bfd_vma) 0, NULL, FALSE,
2513 get_elf_backend_data (abfd)->collect, &bh)))
2515 h = (struct elf_link_hash_entry *) bh;
2517 h->type = STT_OBJECT;
2518 htab->root.hplt = h;
2521 && ! bfd_elf_link_record_dynamic_symbol (info, h))
2525 s = bfd_make_section_with_flags (abfd,
2526 bed->default_use_rela_p ? ".rela.plt" : ".rel.plt",
2527 flags | SEC_READONLY);
2530 || ! bfd_set_section_alignment (abfd, s, ptralign))
2533 if (htab->sgot == NULL
2534 && ! create_got_section (abfd, info))
2538 const char *secname;
2543 for (sec = abfd->sections; sec; sec = sec->next)
2545 secflags = bfd_get_section_flags (abfd, sec);
2546 if ((secflags & (SEC_DATA | SEC_LINKER_CREATED))
2547 || ((secflags & SEC_HAS_CONTENTS) != SEC_HAS_CONTENTS))
2549 secname = bfd_get_section_name (abfd, sec);
2550 relname = bfd_malloc ((bfd_size_type) strlen (secname) + 6);
2551 strcpy (relname, ".rela");
2552 strcat (relname, secname);
2553 if (bfd_get_section_by_name (abfd, secname))
2555 s = bfd_make_section_with_flags (abfd, relname,
2556 flags | SEC_READONLY);
2558 || ! bfd_set_section_alignment (abfd, s, ptralign))
2563 if (bed->want_dynbss)
2565 /* The .dynbss section is a place to put symbols which are defined
2566 by dynamic objects, are referenced by regular objects, and are
2567 not functions. We must allocate space for them in the process
2568 image and use a R_*_COPY reloc to tell the dynamic linker to
2569 initialize them at run time. The linker script puts the .dynbss
2570 section into the .bss section of the final image. */
2571 s = bfd_make_section_with_flags (abfd, ".dynbss",
2572 SEC_ALLOC | SEC_LINKER_CREATED);
2576 /* The .rel[a].bss section holds copy relocs. This section is not
2577 normally needed. We need to create it here, though, so that the
2578 linker will map it to an output section. We can't just create it
2579 only if we need it, because we will not know whether we need it
2580 until we have seen all the input files, and the first time the
2581 main linker code calls BFD after examining all the input files
2582 (size_dynamic_sections) the input sections have already been
2583 mapped to the output sections. If the section turns out not to
2584 be needed, we can discard it later. We will never need this
2585 section when generating a shared object, since they do not use
2589 s = bfd_make_section_with_flags (abfd,
2590 (bed->default_use_rela_p
2591 ? ".rela.bss" : ".rel.bss"),
2592 flags | SEC_READONLY);
2595 || ! bfd_set_section_alignment (abfd, s, ptralign))
2603 /* Copy the extra info we tack onto an elf_link_hash_entry. */
2606 lm32_elf_copy_indirect_symbol (struct bfd_link_info *info,
2607 struct elf_link_hash_entry *dir,
2608 struct elf_link_hash_entry *ind)
2610 struct elf_lm32_link_hash_entry * edir;
2611 struct elf_lm32_link_hash_entry * eind;
2613 edir = (struct elf_lm32_link_hash_entry *) dir;
2614 eind = (struct elf_lm32_link_hash_entry *) ind;
2616 if (eind->dyn_relocs != NULL)
2618 if (edir->dyn_relocs != NULL)
2620 struct elf_lm32_dyn_relocs **pp;
2621 struct elf_lm32_dyn_relocs *p;
2623 /* Add reloc counts against the indirect sym to the direct sym
2624 list. Merge any entries against the same section. */
2625 for (pp = &eind->dyn_relocs; (p = *pp) != NULL;)
2627 struct elf_lm32_dyn_relocs *q;
2629 for (q = edir->dyn_relocs; q != NULL; q = q->next)
2630 if (q->sec == p->sec)
2632 q->pc_count += p->pc_count;
2633 q->count += p->count;
2640 *pp = edir->dyn_relocs;
2643 edir->dyn_relocs = eind->dyn_relocs;
2644 eind->dyn_relocs = NULL;
2647 _bfd_elf_link_hash_copy_indirect (info, dir, ind);
2651 lm32_elf_always_size_sections (bfd *output_bfd,
2652 struct bfd_link_info *info)
2654 if (!info->relocatable)
2656 struct elf_link_hash_entry *h;
2658 /* Force a PT_GNU_STACK segment to be created. */
2659 if (! elf_tdata (output_bfd)->stack_flags)
2660 elf_tdata (output_bfd)->stack_flags = PF_R | PF_W | PF_X;
2662 /* Define __stacksize if it's not defined yet. */
2663 h = elf_link_hash_lookup (elf_hash_table (info), "__stacksize",
2664 FALSE, FALSE, FALSE);
2665 if (! h || h->root.type != bfd_link_hash_defined
2666 || h->type != STT_OBJECT
2669 struct bfd_link_hash_entry *bh = NULL;
2671 if (!(_bfd_generic_link_add_one_symbol
2672 (info, output_bfd, "__stacksize",
2673 BSF_GLOBAL, bfd_abs_section_ptr, DEFAULT_STACK_SIZE,
2674 (const char *) NULL, FALSE,
2675 get_elf_backend_data (output_bfd)->collect, &bh)))
2678 h = (struct elf_link_hash_entry *) bh;
2680 h->type = STT_OBJECT;
2681 /* This one must NOT be hidden. */
2689 lm32_elf_modify_segment_map (bfd *output_bfd,
2690 struct bfd_link_info *info)
2692 struct elf_segment_map *m;
2694 /* objcopy and strip preserve what's already there using elf32_lm32fdpic_copy_
2695 private_bfd_data (). */
2699 for (m = elf_tdata (output_bfd)->segment_map; m != NULL; m = m->next)
2700 if (m->p_type == PT_GNU_STACK)
2705 asection *sec = bfd_get_section_by_name (output_bfd, ".stack");
2706 struct elf_link_hash_entry *h;
2710 /* Obtain the pointer to the __stacksize symbol. */
2711 h = elf_link_hash_lookup (elf_hash_table (info), "__stacksize",
2712 FALSE, FALSE, FALSE);
2713 while (h->root.type == bfd_link_hash_indirect
2714 || h->root.type == bfd_link_hash_warning)
2715 h = (struct elf_link_hash_entry *)h->root.u.i.link;
2716 BFD_ASSERT (h->root.type == bfd_link_hash_defined);
2718 /* Set the section size from the symbol value. We
2719 intentionally ignore the symbol section. */
2720 if (h->root.type == bfd_link_hash_defined)
2721 sec->size = h->root.u.def.value;
2723 sec->size = DEFAULT_STACK_SIZE;
2725 /* Add the stack section to the PT_GNU_STACK segment,
2726 such that its size and alignment requirements make it
2728 m->sections[m->count] = sec;
2737 lm32_elf_modify_program_headers (bfd *output_bfd,
2738 struct bfd_link_info *info)
2740 struct elf_obj_tdata *tdata = elf_tdata (output_bfd);
2741 struct elf_segment_map *m;
2742 Elf_Internal_Phdr *p;
2747 for (p = tdata->phdr, m = tdata->segment_map; m != NULL; m = m->next, p++)
2748 if (m->p_type == PT_GNU_STACK)
2753 struct elf_link_hash_entry *h;
2755 /* Obtain the pointer to the __stacksize symbol. */
2756 h = elf_link_hash_lookup (elf_hash_table (info), "__stacksize",
2757 FALSE, FALSE, FALSE);
2760 while (h->root.type == bfd_link_hash_indirect
2761 || h->root.type == bfd_link_hash_warning)
2762 h = (struct elf_link_hash_entry *) h->root.u.i.link;
2763 BFD_ASSERT (h->root.type == bfd_link_hash_defined);
2766 /* Set the header p_memsz from the symbol value. We
2767 intentionally ignore the symbol section. */
2768 if (h && h->root.type == bfd_link_hash_defined)
2769 p->p_memsz = h->root.u.def.value;
2771 p->p_memsz = DEFAULT_STACK_SIZE;
2781 lm32_elf_copy_private_bfd_data (bfd *ibfd, bfd *obfd)
2783 if (bfd_get_flavour (ibfd) != bfd_target_elf_flavour
2784 || bfd_get_flavour (obfd) != bfd_target_elf_flavour)
2787 BFD_ASSERT (!elf_flags_init (obfd)
2788 || elf_elfheader (obfd)->e_flags == elf_elfheader (ibfd)->e_flags);
2790 elf_elfheader (obfd)->e_flags = elf_elfheader (ibfd)->e_flags;
2791 elf_flags_init (obfd) = TRUE;
2793 /* Copy object attributes. */
2794 _bfd_elf_copy_obj_attributes (ibfd, obfd);
2801 lm32_elf_fdpic_copy_private_bfd_data (bfd *ibfd, bfd *obfd)
2805 if (bfd_get_flavour (ibfd) != bfd_target_elf_flavour
2806 || bfd_get_flavour (obfd) != bfd_target_elf_flavour)
2809 if (! lm32_elf_copy_private_bfd_data (ibfd, obfd))
2812 if (! elf_tdata (ibfd) || ! elf_tdata (ibfd)->phdr
2813 || ! elf_tdata (obfd) || ! elf_tdata (obfd)->phdr)
2816 /* Copy the stack size. */
2817 for (i = 0; i < elf_elfheader (ibfd)->e_phnum; i++)
2818 if (elf_tdata (ibfd)->phdr[i].p_type == PT_GNU_STACK)
2820 Elf_Internal_Phdr *iphdr = &elf_tdata (ibfd)->phdr[i];
2822 for (i = 0; i < elf_elfheader (obfd)->e_phnum; i++)
2823 if (elf_tdata (obfd)->phdr[i].p_type == PT_GNU_STACK)
2825 memcpy (&elf_tdata (obfd)->phdr[i], iphdr, sizeof (*iphdr));
2827 /* Rewrite the phdrs, since we're only called after they were first written. */
2828 if (bfd_seek (obfd, (bfd_signed_vma) get_elf_backend_data (obfd)
2829 ->s->sizeof_ehdr, SEEK_SET) != 0
2830 || get_elf_backend_data (obfd)->s->write_out_phdrs (obfd, elf_tdata (obfd)->phdr,
2831 elf_elfheader (obfd)->e_phnum) != 0)
2843 #define ELF_ARCH bfd_arch_lm32
2844 #define ELF_MACHINE_CODE EM_LATTICEMICO32
2845 #define ELF_MAXPAGESIZE 0x1000
2847 #define TARGET_BIG_SYM bfd_elf32_lm32_vec
2848 #define TARGET_BIG_NAME "elf32-lm32"
2850 #define bfd_elf32_bfd_reloc_type_lookup lm32_reloc_type_lookup
2851 #define bfd_elf32_bfd_reloc_name_lookup lm32_reloc_name_lookup
2852 #define elf_info_to_howto lm32_info_to_howto_rela
2853 #define elf_info_to_howto_rel 0
2854 #define elf_backend_rela_normal 1
2855 #define elf_backend_object_p lm32_elf_object_p
2856 #define elf_backend_final_write_processing lm32_elf_final_write_processing
2857 #define elf_backend_can_gc_sections 1
2858 #define elf_backend_can_refcount 1
2859 #define elf_backend_gc_mark_hook lm32_elf_gc_mark_hook
2860 #define elf_backend_gc_sweep_hook lm32_elf_gc_sweep_hook
2861 #define elf_backend_plt_readonly 1
2862 #define elf_backend_want_got_plt 1
2863 #define elf_backend_want_plt_sym 0
2864 #define elf_backend_got_header_size 12
2865 #define bfd_elf32_bfd_link_hash_table_create lm32_elf_link_hash_table_create
2866 #define elf_backend_check_relocs lm32_elf_check_relocs
2867 #define elf_backend_reloc_type_class lm32_elf_reloc_type_class
2868 #define elf_backend_copy_indirect_symbol lm32_elf_copy_indirect_symbol
2869 #define elf_backend_size_dynamic_sections lm32_elf_size_dynamic_sections
2870 #define elf_backend_omit_section_dynsym ((bfd_boolean (*) (bfd *, struct bfd_link_info *, asection *)) bfd_true)
2871 #define elf_backend_create_dynamic_sections lm32_elf_create_dynamic_sections
2872 #define elf_backend_finish_dynamic_sections lm32_elf_finish_dynamic_sections
2873 #define elf_backend_adjust_dynamic_symbol lm32_elf_adjust_dynamic_symbol
2874 #define elf_backend_finish_dynamic_symbol lm32_elf_finish_dynamic_symbol
2875 #define elf_backend_relocate_section lm32_elf_relocate_section
2877 #include "elf32-target.h"
2879 #undef ELF_MAXPAGESIZE
2880 #define ELF_MAXPAGESIZE 0x4000
2883 #undef TARGET_BIG_SYM
2884 #define TARGET_BIG_SYM bfd_elf32_lm32fdpic_vec
2885 #undef TARGET_BIG_NAME
2886 #define TARGET_BIG_NAME "elf32-lm32fdpic"
2888 #define elf32_bed elf32_lm32fdpic_bed
2890 #undef elf_backend_always_size_sections
2891 #define elf_backend_always_size_sections lm32_elf_always_size_sections
2892 #undef elf_backend_modify_segment_map
2893 #define elf_backend_modify_segment_map lm32_elf_modify_segment_map
2894 #undef elf_backend_modify_program_headers
2895 #define elf_backend_modify_program_headers lm32_elf_modify_program_headers
2896 #undef bfd_elf32_bfd_copy_private_bfd_data
2897 #define bfd_elf32_bfd_copy_private_bfd_data lm32_elf_fdpic_copy_private_bfd_data
2899 #include "elf32-target.h"