1 /* VAX series support for 32-bit ELF
2 Copyright (C) 1993-2016 Free Software Foundation, Inc.
3 Contributed by Matt Thomas <matt@3am-software.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. */
29 static reloc_howto_type *reloc_type_lookup (bfd *, bfd_reloc_code_real_type);
30 static void rtype_to_howto (bfd *, arelent *, Elf_Internal_Rela *);
31 static struct bfd_hash_entry *elf_vax_link_hash_newfunc (struct bfd_hash_entry *,
32 struct bfd_hash_table *,
34 static struct bfd_link_hash_table *elf_vax_link_hash_table_create (bfd *);
35 static bfd_boolean elf_vax_check_relocs (bfd *, struct bfd_link_info *,
36 asection *, const Elf_Internal_Rela *);
37 static bfd_boolean elf_vax_adjust_dynamic_symbol (struct bfd_link_info *,
38 struct elf_link_hash_entry *);
39 static bfd_boolean elf_vax_size_dynamic_sections (bfd *, struct bfd_link_info *);
40 static bfd_boolean elf_vax_relocate_section (bfd *, struct bfd_link_info *,
41 bfd *, asection *, bfd_byte *,
43 Elf_Internal_Sym *, asection **);
44 static bfd_boolean elf_vax_finish_dynamic_symbol (bfd *, struct bfd_link_info *,
45 struct elf_link_hash_entry *,
47 static bfd_boolean elf_vax_finish_dynamic_sections (bfd *,
48 struct bfd_link_info *);
49 static bfd_vma elf_vax_plt_sym_val (bfd_vma, const asection *,
52 static bfd_boolean elf32_vax_set_private_flags (bfd *, flagword);
53 static bfd_boolean elf32_vax_merge_private_bfd_data (bfd *, bfd *);
54 static bfd_boolean elf32_vax_print_private_bfd_data (bfd *, void *);
56 static reloc_howto_type howto_table[] = {
57 HOWTO (R_VAX_NONE, /* type */
59 3, /* size (0 = byte, 1 = short, 2 = long) */
61 FALSE, /* pc_relative */
63 complain_overflow_dont, /* complain_on_overflow */
64 bfd_elf_generic_reloc, /* special_function */
65 "R_VAX_NONE", /* name */
66 FALSE, /* partial_inplace */
68 0x00000000, /* dst_mask */
69 FALSE), /* pcrel_offset */
71 HOWTO (R_VAX_32, /* type */
73 2, /* size (0 = byte, 1 = short, 2 = long) */
75 FALSE, /* pc_relative */
77 complain_overflow_bitfield, /* complain_on_overflow */
78 bfd_elf_generic_reloc, /* special_function */
79 "R_VAX_32", /* name */
80 FALSE, /* partial_inplace */
82 0xffffffff, /* dst_mask */
83 FALSE), /* pcrel_offset */
85 HOWTO (R_VAX_16, /* type */
87 1, /* size (0 = byte, 1 = short, 2 = long) */
89 FALSE, /* pc_relative */
91 complain_overflow_bitfield, /* complain_on_overflow */
92 bfd_elf_generic_reloc, /* special_function */
93 "R_VAX_16", /* name */
94 FALSE, /* partial_inplace */
96 0x0000ffff, /* dst_mask */
97 FALSE), /* pcrel_offset */
99 HOWTO (R_VAX_8, /* type */
101 0, /* size (0 = byte, 1 = short, 2 = long) */
103 FALSE, /* pc_relative */
105 complain_overflow_bitfield, /* complain_on_overflow */
106 bfd_elf_generic_reloc, /* special_function */
107 "R_VAX_8", /* name */
108 FALSE, /* partial_inplace */
110 0x000000ff, /* dst_mask */
111 FALSE), /* pcrel_offset */
113 HOWTO (R_VAX_PC32, /* type */
115 2, /* size (0 = byte, 1 = short, 2 = long) */
117 TRUE, /* pc_relative */
119 complain_overflow_bitfield, /* complain_on_overflow */
120 bfd_elf_generic_reloc, /* special_function */
121 "R_VAX_PC32", /* name */
122 FALSE, /* partial_inplace */
124 0xffffffff, /* dst_mask */
125 TRUE), /* pcrel_offset */
127 HOWTO (R_VAX_PC16, /* type */
129 1, /* size (0 = byte, 1 = short, 2 = long) */
131 TRUE, /* pc_relative */
133 complain_overflow_signed, /* complain_on_overflow */
134 bfd_elf_generic_reloc, /* special_function */
135 "R_VAX_PC16", /* name */
136 FALSE, /* partial_inplace */
138 0x0000ffff, /* dst_mask */
139 TRUE), /* pcrel_offset */
141 HOWTO (R_VAX_PC8, /* type */
143 0, /* size (0 = byte, 1 = short, 2 = long) */
145 TRUE, /* pc_relative */
147 complain_overflow_signed, /* complain_on_overflow */
148 bfd_elf_generic_reloc, /* special_function */
149 "R_VAX_PC8", /* name */
150 FALSE, /* partial_inplace */
152 0x000000ff, /* dst_mask */
153 TRUE), /* pcrel_offset */
155 HOWTO (R_VAX_GOT32, /* type */
157 2, /* size (0 = byte, 1 = short, 2 = long) */
159 TRUE, /* pc_relative */
161 complain_overflow_bitfield, /* complain_on_overflow */
162 bfd_elf_generic_reloc, /* special_function */
163 "R_VAX_GOT32", /* name */
164 FALSE, /* partial_inplace */
166 0xffffffff, /* dst_mask */
167 TRUE), /* pcrel_offset */
175 HOWTO (R_VAX_PLT32, /* type */
177 2, /* size (0 = byte, 1 = short, 2 = long) */
179 TRUE, /* pc_relative */
181 complain_overflow_bitfield, /* complain_on_overflow */
182 bfd_elf_generic_reloc, /* special_function */
183 "R_VAX_PLT32", /* name */
184 FALSE, /* partial_inplace */
186 0xffffffff, /* dst_mask */
187 TRUE), /* pcrel_offset */
195 HOWTO (R_VAX_COPY, /* type */
197 0, /* size (0 = byte, 1 = short, 2 = long) */
199 FALSE, /* pc_relative */
201 complain_overflow_dont, /* complain_on_overflow */
202 bfd_elf_generic_reloc, /* special_function */
203 "R_VAX_COPY", /* name */
204 FALSE, /* partial_inplace */
206 0xffffffff, /* dst_mask */
207 FALSE), /* pcrel_offset */
209 HOWTO (R_VAX_GLOB_DAT, /* type */
211 2, /* size (0 = byte, 1 = short, 2 = long) */
213 FALSE, /* pc_relative */
215 complain_overflow_dont, /* complain_on_overflow */
216 bfd_elf_generic_reloc, /* special_function */
217 "R_VAX_GLOB_DAT", /* name */
218 FALSE, /* partial_inplace */
220 0xffffffff, /* dst_mask */
221 FALSE), /* pcrel_offset */
223 HOWTO (R_VAX_JMP_SLOT, /* type */
225 2, /* size (0 = byte, 1 = short, 2 = long) */
227 FALSE, /* pc_relative */
229 complain_overflow_dont, /* complain_on_overflow */
230 bfd_elf_generic_reloc, /* special_function */
231 "R_VAX_JMP_SLOT", /* name */
232 FALSE, /* partial_inplace */
234 0xffffffff, /* dst_mask */
235 FALSE), /* pcrel_offset */
237 HOWTO (R_VAX_RELATIVE, /* type */
239 2, /* size (0 = byte, 1 = short, 2 = long) */
241 FALSE, /* pc_relative */
243 complain_overflow_dont, /* complain_on_overflow */
244 bfd_elf_generic_reloc, /* special_function */
245 "R_VAX_RELATIVE", /* name */
246 FALSE, /* partial_inplace */
248 0xffffffff, /* dst_mask */
249 FALSE), /* pcrel_offset */
251 /* GNU extension to record C++ vtable hierarchy */
252 HOWTO (R_VAX_GNU_VTINHERIT, /* type */
254 2, /* size (0 = byte, 1 = short, 2 = long) */
256 FALSE, /* pc_relative */
258 complain_overflow_dont, /* complain_on_overflow */
259 NULL, /* special_function */
260 "R_VAX_GNU_VTINHERIT", /* name */
261 FALSE, /* partial_inplace */
264 FALSE), /* pcrel_offset */
266 /* GNU extension to record C++ vtable member usage */
267 HOWTO (R_VAX_GNU_VTENTRY, /* type */
269 2, /* size (0 = byte, 1 = short, 2 = long) */
271 FALSE, /* pc_relative */
273 complain_overflow_dont, /* complain_on_overflow */
274 _bfd_elf_rel_vtable_reloc_fn, /* special_function */
275 "R_VAX_GNU_VTENTRY", /* name */
276 FALSE, /* partial_inplace */
279 FALSE), /* pcrel_offset */
283 rtype_to_howto (bfd *abfd, arelent *cache_ptr, Elf_Internal_Rela *dst)
287 r_type = ELF32_R_TYPE (dst->r_info);
288 if (r_type >= R_VAX_max)
290 (*_bfd_error_handler) (_("%B: unrecognised VAX reloc number: %d"),
292 bfd_set_error (bfd_error_bad_value);
295 cache_ptr->howto = &howto_table[r_type];
298 #define elf_info_to_howto rtype_to_howto
302 bfd_reloc_code_real_type bfd_val;
305 { BFD_RELOC_NONE, R_VAX_NONE },
306 { BFD_RELOC_32, R_VAX_32 },
307 { BFD_RELOC_16, R_VAX_16 },
308 { BFD_RELOC_8, R_VAX_8 },
309 { BFD_RELOC_32_PCREL, R_VAX_PC32 },
310 { BFD_RELOC_16_PCREL, R_VAX_PC16 },
311 { BFD_RELOC_8_PCREL, R_VAX_PC8 },
312 { BFD_RELOC_32_GOT_PCREL, R_VAX_GOT32 },
313 { BFD_RELOC_32_PLT_PCREL, R_VAX_PLT32 },
314 { BFD_RELOC_NONE, R_VAX_COPY },
315 { BFD_RELOC_VAX_GLOB_DAT, R_VAX_GLOB_DAT },
316 { BFD_RELOC_VAX_JMP_SLOT, R_VAX_JMP_SLOT },
317 { BFD_RELOC_VAX_RELATIVE, R_VAX_RELATIVE },
318 { BFD_RELOC_CTOR, R_VAX_32 },
319 { BFD_RELOC_VTABLE_INHERIT, R_VAX_GNU_VTINHERIT },
320 { BFD_RELOC_VTABLE_ENTRY, R_VAX_GNU_VTENTRY },
323 static reloc_howto_type *
324 reloc_type_lookup (bfd *abfd ATTRIBUTE_UNUSED, bfd_reloc_code_real_type code)
327 for (i = 0; i < sizeof (reloc_map) / sizeof (reloc_map[0]); i++)
329 if (reloc_map[i].bfd_val == code)
330 return &howto_table[reloc_map[i].elf_val];
335 static reloc_howto_type *
336 reloc_name_lookup (bfd *abfd ATTRIBUTE_UNUSED,
341 for (i = 0; i < sizeof (howto_table) / sizeof (howto_table[0]); i++)
342 if (howto_table[i].name != NULL
343 && strcasecmp (howto_table[i].name, r_name) == 0)
344 return &howto_table[i];
349 #define bfd_elf32_bfd_reloc_type_lookup reloc_type_lookup
350 #define bfd_elf32_bfd_reloc_name_lookup reloc_name_lookup
351 #define ELF_ARCH bfd_arch_vax
352 /* end code generated by elf.el */
354 /* Functions for the VAX ELF linker. */
356 /* The name of the dynamic interpreter. This is put in the .interp
359 #define ELF_DYNAMIC_INTERPRETER "/usr/libexec/ld.elf_so"
361 /* The size in bytes of an entry in the procedure linkage table. */
363 #define PLT_ENTRY_SIZE 12
365 /* The first entry in a procedure linkage table looks like this. See
366 the SVR4 ABI VAX supplement to see how this works. */
368 static const bfd_byte elf_vax_plt0_entry[PLT_ENTRY_SIZE] =
370 0xdd, 0xef, /* pushl l^ */
371 0, 0, 0, 0, /* offset to .plt.got + 4 */
372 0x17, 0xff, /* jmp @L^(pc) */
373 0, 0, 0, 0, /* offset to .plt.got + 8 */
376 /* Subsequent entries in a procedure linkage table look like this. */
378 static const bfd_byte elf_vax_plt_entry[PLT_ENTRY_SIZE] =
380 0xfc, 0x0f, /* .word ^M<r11:r2> */
381 0x16, 0xef, /* jsb L^(pc) */
382 0, 0, 0, 0, /* replaced with offset to start of .plt */
383 0, 0, 0, 0, /* index into .rela.plt */
386 /* The VAX linker needs to keep track of the number of relocs that it
387 decides to copy in check_relocs for each symbol. This is so that it
388 can discard PC relative relocs if it doesn't need them when linking
389 with -Bsymbolic. We store the information in a field extending the
390 regular ELF linker hash table. */
392 /* This structure keeps track of the number of PC relative relocs we have
393 copied for a given symbol. */
395 struct elf_vax_pcrel_relocs_copied
398 struct elf_vax_pcrel_relocs_copied *next;
399 /* A section in dynobj. */
401 /* Number of relocs copied in this section. */
405 /* VAX ELF linker hash entry. */
407 struct elf_vax_link_hash_entry
409 struct elf_link_hash_entry root;
411 /* Number of PC relative relocs copied for this symbol. */
412 struct elf_vax_pcrel_relocs_copied *pcrel_relocs_copied;
417 /* Declare this now that the above structures are defined. */
419 static bfd_boolean elf_vax_discard_copies (struct elf_vax_link_hash_entry *,
422 /* Declare this now that the above structures are defined. */
424 static bfd_boolean elf_vax_instantiate_got_entries (struct elf_link_hash_entry *,
427 /* Traverse an VAX ELF linker hash table. */
429 #define elf_vax_link_hash_traverse(table, func, info) \
430 (elf_link_hash_traverse \
432 (bfd_boolean (*) (struct elf_link_hash_entry *, void *)) (func), \
435 /* Create an entry in an VAX ELF linker hash table. */
437 static struct bfd_hash_entry *
438 elf_vax_link_hash_newfunc (struct bfd_hash_entry *entry,
439 struct bfd_hash_table *table,
442 struct elf_vax_link_hash_entry *ret =
443 (struct elf_vax_link_hash_entry *) entry;
445 /* Allocate the structure if it has not already been allocated by a
448 ret = ((struct elf_vax_link_hash_entry *)
449 bfd_hash_allocate (table,
450 sizeof (struct elf_vax_link_hash_entry)));
452 return (struct bfd_hash_entry *) ret;
454 /* Call the allocation method of the superclass. */
455 ret = ((struct elf_vax_link_hash_entry *)
456 _bfd_elf_link_hash_newfunc ((struct bfd_hash_entry *) ret,
460 ret->pcrel_relocs_copied = NULL;
463 return (struct bfd_hash_entry *) ret;
466 /* Create an VAX ELF linker hash table. */
468 static struct bfd_link_hash_table *
469 elf_vax_link_hash_table_create (bfd *abfd)
471 struct elf_link_hash_table *ret;
472 bfd_size_type amt = sizeof (struct elf_link_hash_table);
474 ret = bfd_zmalloc (amt);
478 if (!_bfd_elf_link_hash_table_init (ret, abfd,
479 elf_vax_link_hash_newfunc,
480 sizeof (struct elf_vax_link_hash_entry),
490 /* Keep vax-specific flags in the ELF header */
492 elf32_vax_set_private_flags (bfd *abfd, flagword flags)
494 elf_elfheader (abfd)->e_flags = flags;
495 elf_flags_init (abfd) = TRUE;
499 /* Merge backend specific data from an object file to the output
500 object file when linking. */
502 elf32_vax_merge_private_bfd_data (bfd *ibfd, bfd *obfd)
506 if ( bfd_get_flavour (ibfd) != bfd_target_elf_flavour
507 || bfd_get_flavour (obfd) != bfd_target_elf_flavour)
510 in_flags = elf_elfheader (ibfd)->e_flags;
512 if (!elf_flags_init (obfd))
514 elf_flags_init (obfd) = TRUE;
515 elf_elfheader (obfd)->e_flags = in_flags;
521 /* Display the flags field */
523 elf32_vax_print_private_bfd_data (bfd *abfd, void * ptr)
525 FILE *file = (FILE *) ptr;
527 BFD_ASSERT (abfd != NULL && ptr != NULL);
529 /* Print normal ELF private data. */
530 _bfd_elf_print_private_bfd_data (abfd, ptr);
532 /* Ignore init flag - it may not be set, despite the flags field containing valid data. */
534 /* xgettext:c-format */
535 fprintf (file, _("private flags = %lx:"), elf_elfheader (abfd)->e_flags);
537 if (elf_elfheader (abfd)->e_flags & EF_VAX_NONPIC)
538 fprintf (file, _(" [nonpic]"));
540 if (elf_elfheader (abfd)->e_flags & EF_VAX_DFLOAT)
541 fprintf (file, _(" [d-float]"));
543 if (elf_elfheader (abfd)->e_flags & EF_VAX_GFLOAT)
544 fprintf (file, _(" [g-float]"));
550 /* Look through the relocs for a section during the first phase, and
551 allocate space in the global offset table or procedure linkage
555 elf_vax_check_relocs (bfd *abfd, struct bfd_link_info *info, asection *sec,
556 const Elf_Internal_Rela *relocs)
559 Elf_Internal_Shdr *symtab_hdr;
560 struct elf_link_hash_entry **sym_hashes;
561 const Elf_Internal_Rela *rel;
562 const Elf_Internal_Rela *rel_end;
567 if (bfd_link_relocatable (info))
570 dynobj = elf_hash_table (info)->dynobj;
571 symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
572 sym_hashes = elf_sym_hashes (abfd);
578 rel_end = relocs + sec->reloc_count;
579 for (rel = relocs; rel < rel_end; rel++)
581 unsigned long r_symndx;
582 struct elf_link_hash_entry *h;
584 r_symndx = ELF32_R_SYM (rel->r_info);
586 if (r_symndx < symtab_hdr->sh_info)
590 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
591 while (h->root.type == bfd_link_hash_indirect
592 || h->root.type == bfd_link_hash_warning)
593 h = (struct elf_link_hash_entry *) h->root.u.i.link;
595 /* PR15323, ref flags aren't set for references in the same
597 h->root.non_ir_ref = 1;
600 switch (ELF32_R_TYPE (rel->r_info))
603 BFD_ASSERT (h != NULL);
605 /* If this is a local symbol, we resolve it directly without
606 creating a global offset table entry. */
608 || h == elf_hash_table (info)->hgot
609 || h == elf_hash_table (info)->hplt)
612 /* This symbol requires a global offset table entry. */
616 /* Create the .got section. */
617 elf_hash_table (info)->dynobj = dynobj = abfd;
618 if (!_bfd_elf_create_got_section (dynobj, info))
624 sgot = bfd_get_linker_section (dynobj, ".got");
625 BFD_ASSERT (sgot != NULL);
629 && (h != NULL || bfd_link_pic (info)))
631 srelgot = bfd_get_linker_section (dynobj, ".rela.got");
634 flagword flags = (SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS
635 | SEC_IN_MEMORY | SEC_LINKER_CREATED
638 srelgot = bfd_make_section_anyway_with_flags (dynobj,
642 || !bfd_set_section_alignment (dynobj, srelgot, 2))
649 struct elf_vax_link_hash_entry *eh;
651 eh = (struct elf_vax_link_hash_entry *) h;
652 if (h->got.refcount == -1)
655 eh->got_addend = rel->r_addend;
660 if (eh->got_addend != (bfd_vma) rel->r_addend)
661 (*_bfd_error_handler)
662 (_("%s: warning: GOT addend of %ld to `%s' does"
663 " not match previous GOT addend of %ld"),
664 bfd_get_filename (abfd), rel->r_addend,
673 /* This symbol requires a procedure linkage table entry. We
674 actually build the entry in adjust_dynamic_symbol,
675 because this might be a case of linking PIC code which is
676 never referenced by a dynamic object, in which case we
677 don't need to generate a procedure linkage table entry
679 BFD_ASSERT (h != NULL);
681 /* If this is a local symbol, we resolve it directly without
682 creating a procedure linkage table entry. */
687 if (h->plt.refcount == -1)
696 /* If we are creating a shared library and this is not a local
697 symbol, we need to copy the reloc into the shared library.
698 However when linking with -Bsymbolic and this is a global
699 symbol which is defined in an object we are including in the
700 link (i.e., DEF_REGULAR is set), then we can resolve the
701 reloc directly. At this point we have not seen all the input
702 files, so it is possible that DEF_REGULAR is not set now but
703 will be set later (it is never cleared). We account for that
704 possibility below by storing information in the
705 pcrel_relocs_copied field of the hash table entry. */
706 if (!(bfd_link_pic (info)
707 && (sec->flags & SEC_ALLOC) != 0
710 || !h->def_regular)))
713 && ELF_ST_VISIBILITY (h->other) == STV_DEFAULT
716 /* Make sure a plt entry is created for this symbol if
717 it turns out to be a function defined by a dynamic
719 if (h->plt.refcount == -1)
726 /* If this is a local symbol, we can resolve it directly. */
728 && (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT
736 if (h != NULL && ELF_ST_VISIBILITY (h->other) == STV_DEFAULT)
738 /* Make sure a plt entry is created for this symbol if it
739 turns out to be a function defined by a dynamic object. */
740 if (h->plt.refcount == -1)
746 /* If we are creating a shared library, we need to copy the
747 reloc into the shared library. */
748 if (bfd_link_pic (info)
749 && (sec->flags & SEC_ALLOC) != 0)
751 /* When creating a shared object, we must copy these
752 reloc types into the output file. We create a reloc
753 section in dynobj and make room for this reloc. */
756 sreloc = _bfd_elf_make_dynamic_reloc_section
757 (sec, dynobj, 2, abfd, /*rela?*/ TRUE);
762 if (sec->flags & SEC_READONLY)
763 info->flags |= DF_TEXTREL;
766 sreloc->size += sizeof (Elf32_External_Rela);
768 /* If we are linking with -Bsymbolic, we count the number of
769 PC relative relocations we have entered for this symbol,
770 so that we can discard them again if the symbol is later
771 defined by a regular object. Note that this function is
772 only called if we are using a vaxelf linker hash table,
773 which means that h is really a pointer to an
774 elf_vax_link_hash_entry. */
775 if ((ELF32_R_TYPE (rel->r_info) == R_VAX_PC8
776 || ELF32_R_TYPE (rel->r_info) == R_VAX_PC16
777 || ELF32_R_TYPE (rel->r_info) == R_VAX_PC32)
780 struct elf_vax_link_hash_entry *eh;
781 struct elf_vax_pcrel_relocs_copied *p;
783 eh = (struct elf_vax_link_hash_entry *) h;
785 for (p = eh->pcrel_relocs_copied; p != NULL; p = p->next)
786 if (p->section == sreloc)
791 p = ((struct elf_vax_pcrel_relocs_copied *)
792 bfd_alloc (dynobj, (bfd_size_type) sizeof *p));
795 p->next = eh->pcrel_relocs_copied;
796 eh->pcrel_relocs_copied = p;
807 /* This relocation describes the C++ object vtable hierarchy.
808 Reconstruct it for later use during GC. */
809 case R_VAX_GNU_VTINHERIT:
810 if (!bfd_elf_gc_record_vtinherit (abfd, sec, h, rel->r_offset))
814 /* This relocation describes which C++ vtable entries are actually
815 used. Record for later use during GC. */
816 case R_VAX_GNU_VTENTRY:
817 BFD_ASSERT (h != NULL);
819 && !bfd_elf_gc_record_vtentry (abfd, sec, h, rel->r_addend))
831 /* Return the section that should be marked against GC for a given
835 elf_vax_gc_mark_hook (asection *sec,
836 struct bfd_link_info *info,
837 Elf_Internal_Rela *rel,
838 struct elf_link_hash_entry *h,
839 Elf_Internal_Sym *sym)
842 switch (ELF32_R_TYPE (rel->r_info))
844 case R_VAX_GNU_VTINHERIT:
845 case R_VAX_GNU_VTENTRY:
849 return _bfd_elf_gc_mark_hook (sec, info, rel, h, sym);
852 /* Update the got entry reference counts for the section being removed. */
855 elf_vax_gc_sweep_hook (bfd *abfd, struct bfd_link_info *info, asection *sec,
856 const Elf_Internal_Rela *relocs)
858 Elf_Internal_Shdr *symtab_hdr;
859 struct elf_link_hash_entry **sym_hashes;
860 const Elf_Internal_Rela *rel, *relend;
863 if (bfd_link_relocatable (info))
866 dynobj = elf_hash_table (info)->dynobj;
870 symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
871 sym_hashes = elf_sym_hashes (abfd);
873 relend = relocs + sec->reloc_count;
874 for (rel = relocs; rel < relend; rel++)
876 unsigned long r_symndx;
877 struct elf_link_hash_entry *h = NULL;
879 r_symndx = ELF32_R_SYM (rel->r_info);
880 if (r_symndx >= symtab_hdr->sh_info)
882 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
883 while (h->root.type == bfd_link_hash_indirect
884 || h->root.type == bfd_link_hash_warning)
885 h = (struct elf_link_hash_entry *) h->root.u.i.link;
888 switch (ELF32_R_TYPE (rel->r_info))
891 if (h != NULL && h->got.refcount > 0)
902 if (h != NULL && h->plt.refcount > 0)
914 /* Adjust a symbol defined by a dynamic object and referenced by a
915 regular object. The current definition is in some section of the
916 dynamic object, but we're not including those sections. We have to
917 change the definition to something the rest of the link can
921 elf_vax_adjust_dynamic_symbol (struct bfd_link_info *info,
922 struct elf_link_hash_entry *h)
927 dynobj = elf_hash_table (info)->dynobj;
929 /* Make sure we know what is going on here. */
930 BFD_ASSERT (dynobj != NULL
932 || h->u.weakdef != NULL
935 && !h->def_regular)));
937 /* If this is a function, put it in the procedure linkage table. We
938 will fill in the contents of the procedure linkage table later,
939 when we know the address of the .got section. */
940 if (h->type == STT_FUNC
943 if (h->plt.refcount <= 0
944 || SYMBOL_CALLS_LOCAL (info, h)
945 || (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT
946 && h->root.type == bfd_link_hash_undefweak))
948 /* This case can occur if we saw a PLTxx reloc in an input
949 file, but the symbol was never referred to by a dynamic
950 object, or if all references were garbage collected. In
951 such a case, we don't actually need to build a procedure
952 linkage table, and we can just do a PCxx reloc instead. */
953 h->plt.offset = (bfd_vma) -1;
958 s = bfd_get_linker_section (dynobj, ".plt");
959 BFD_ASSERT (s != NULL);
961 /* If this is the first .plt entry, make room for the special
965 s->size += PLT_ENTRY_SIZE;
968 /* If this symbol is not defined in a regular file, and we are
969 not generating a shared library, then set the symbol to this
970 location in the .plt. This is required to make function
971 pointers compare as equal between the normal executable and
972 the shared library. */
973 if (!bfd_link_pic (info)
976 h->root.u.def.section = s;
977 h->root.u.def.value = s->size;
980 h->plt.offset = s->size;
982 /* Make room for this entry. */
983 s->size += PLT_ENTRY_SIZE;
985 /* We also need to make an entry in the .got.plt section, which
986 will be placed in the .got section by the linker script. */
988 s = bfd_get_linker_section (dynobj, ".got.plt");
989 BFD_ASSERT (s != NULL);
992 /* We also need to make an entry in the .rela.plt section. */
994 s = bfd_get_linker_section (dynobj, ".rela.plt");
995 BFD_ASSERT (s != NULL);
996 s->size += sizeof (Elf32_External_Rela);
1001 /* Reinitialize the plt offset now that it is not used as a reference
1003 h->plt.offset = (bfd_vma) -1;
1005 /* If this is a weak symbol, and there is a real definition, the
1006 processor independent code will have arranged for us to see the
1007 real definition first, and we can just use the same value. */
1008 if (h->u.weakdef != NULL)
1010 BFD_ASSERT (h->u.weakdef->root.type == bfd_link_hash_defined
1011 || h->u.weakdef->root.type == bfd_link_hash_defweak);
1012 h->root.u.def.section = h->u.weakdef->root.u.def.section;
1013 h->root.u.def.value = h->u.weakdef->root.u.def.value;
1017 /* This is a reference to a symbol defined by a dynamic object which
1018 is not a function. */
1020 /* If we are creating a shared library, we must presume that the
1021 only references to the symbol are via the global offset table.
1022 For such cases we need not do anything here; the relocations will
1023 be handled correctly by relocate_section. */
1024 if (bfd_link_pic (info))
1027 /* We must allocate the symbol in our .dynbss section, which will
1028 become part of the .bss section of the executable. There will be
1029 an entry for this symbol in the .dynsym section. The dynamic
1030 object will contain position independent code, so all references
1031 from the dynamic object to this symbol will go through the global
1032 offset table. The dynamic linker will use the .dynsym entry to
1033 determine the address it must put in the global offset table, so
1034 both the dynamic object and the regular object will refer to the
1035 same memory location for the variable. */
1037 s = bfd_get_linker_section (dynobj, ".dynbss");
1038 BFD_ASSERT (s != NULL);
1040 /* We must generate a R_VAX_COPY reloc to tell the dynamic linker to
1041 copy the initial value out of the dynamic object and into the
1042 runtime process image. We need to remember the offset into the
1043 .rela.bss section we are going to use. */
1044 if ((h->root.u.def.section->flags & SEC_ALLOC) != 0 && h->size != 0)
1048 srel = bfd_get_linker_section (dynobj, ".rela.bss");
1049 BFD_ASSERT (srel != NULL);
1050 srel->size += sizeof (Elf32_External_Rela);
1054 return _bfd_elf_adjust_dynamic_copy (info, h, s);
1057 /* This function is called via elf_link_hash_traverse. It resets GOT
1058 and PLT (.GOT) reference counts back to -1 so normal PC32 relocation
1062 elf_vax_discard_got_entries (struct elf_link_hash_entry *h,
1063 void *infoptr ATTRIBUTE_UNUSED)
1065 h->got.refcount = -1;
1066 h->plt.refcount = -1;
1071 /* Discard unused dynamic data if this is a static link. */
1074 elf_vax_always_size_sections (bfd *output_bfd ATTRIBUTE_UNUSED,
1075 struct bfd_link_info *info)
1080 dynobj = elf_hash_table (info)->dynobj;
1082 if (dynobj && !elf_hash_table (info)->dynamic_sections_created)
1084 /* We may have created entries in the .rela.got and .got sections.
1085 However, if we are not creating the dynamic sections, we will
1086 not actually use these entries. Reset the size of .rela.got
1087 and .got, which will cause them to get stripped from the output
1089 s = bfd_get_linker_section (dynobj, ".rela.got");
1092 s = bfd_get_linker_section (dynobj, ".got.plt");
1095 s = bfd_get_linker_section (dynobj, ".got");
1100 /* If this is a static link, we need to discard all the got entries we've
1102 if (!dynobj || !elf_hash_table (info)->dynamic_sections_created)
1103 elf_link_hash_traverse (elf_hash_table (info),
1104 elf_vax_discard_got_entries,
1110 /* Set the sizes of the dynamic sections. */
1113 elf_vax_size_dynamic_sections (bfd *output_bfd, struct bfd_link_info *info)
1119 bfd_boolean reltext;
1121 dynobj = elf_hash_table (info)->dynobj;
1122 BFD_ASSERT (dynobj != NULL);
1124 if (elf_hash_table (info)->dynamic_sections_created)
1126 /* Set the contents of the .interp section to the interpreter. */
1127 if (bfd_link_executable (info) && !info->nointerp)
1129 s = bfd_get_linker_section (dynobj, ".interp");
1130 BFD_ASSERT (s != NULL);
1131 s->size = sizeof ELF_DYNAMIC_INTERPRETER;
1132 s->contents = (unsigned char *) ELF_DYNAMIC_INTERPRETER;
1136 /* If this is a -Bsymbolic shared link, then we need to discard all PC
1137 relative relocs against symbols defined in a regular object. We
1138 allocated space for them in the check_relocs routine, but we will not
1139 fill them in in the relocate_section routine. */
1140 if (bfd_link_pic (info) && info->symbolic)
1141 elf_vax_link_hash_traverse (elf_hash_table (info),
1142 elf_vax_discard_copies,
1145 /* If this is a -Bsymbolic shared link, we need to discard all the got
1146 entries we've recorded. Otherwise, we need to instantiate (allocate
1148 elf_link_hash_traverse (elf_hash_table (info),
1149 elf_vax_instantiate_got_entries,
1152 /* The check_relocs and adjust_dynamic_symbol entry points have
1153 determined the sizes of the various dynamic sections. Allocate
1158 for (s = dynobj->sections; s != NULL; s = s->next)
1162 if ((s->flags & SEC_LINKER_CREATED) == 0)
1165 /* It's OK to base decisions on the section name, because none
1166 of the dynobj section names depend upon the input files. */
1167 name = bfd_get_section_name (dynobj, s);
1169 if (strcmp (name, ".plt") == 0)
1171 /* Remember whether there is a PLT. */
1174 else if (CONST_STRNEQ (name, ".rela"))
1180 /* Remember whether there are any reloc sections other
1182 if (strcmp (name, ".rela.plt") != 0)
1184 const char *outname;
1188 /* If this relocation section applies to a read only
1189 section, then we probably need a DT_TEXTREL
1190 entry. .rela.plt is actually associated with
1191 .got.plt, which is never readonly. */
1192 outname = bfd_get_section_name (output_bfd,
1194 target = bfd_get_section_by_name (output_bfd, outname + 5);
1196 && (target->flags & SEC_READONLY) != 0
1197 && (target->flags & SEC_ALLOC) != 0)
1201 /* We use the reloc_count field as a counter if we need
1202 to copy relocs into the output file. */
1206 else if (! CONST_STRNEQ (name, ".got")
1207 && strcmp (name, ".dynbss") != 0)
1209 /* It's not one of our sections, so don't allocate space. */
1215 /* If we don't need this section, strip it from the
1216 output file. This is mostly to handle .rela.bss and
1217 .rela.plt. We must create both sections in
1218 create_dynamic_sections, because they must be created
1219 before the linker maps input sections to output
1220 sections. The linker does that before
1221 adjust_dynamic_symbol is called, and it is that
1222 function which decides whether anything needs to go
1223 into these sections. */
1224 s->flags |= SEC_EXCLUDE;
1228 if ((s->flags & SEC_HAS_CONTENTS) == 0)
1231 /* Allocate memory for the section contents. */
1232 s->contents = (bfd_byte *) bfd_zalloc (dynobj, s->size);
1233 if (s->contents == NULL)
1237 if (elf_hash_table (info)->dynamic_sections_created)
1239 /* Add some entries to the .dynamic section. We fill in the
1240 values later, in elf_vax_finish_dynamic_sections, but we
1241 must add the entries now so that we get the correct size for
1242 the .dynamic section. The DT_DEBUG entry is filled in by the
1243 dynamic linker and used by the debugger. */
1244 #define add_dynamic_entry(TAG, VAL) \
1245 _bfd_elf_add_dynamic_entry (info, TAG, VAL)
1247 if (!bfd_link_pic (info))
1249 if (!add_dynamic_entry (DT_DEBUG, 0))
1255 if (!add_dynamic_entry (DT_PLTGOT, 0)
1256 || !add_dynamic_entry (DT_PLTRELSZ, 0)
1257 || !add_dynamic_entry (DT_PLTREL, DT_RELA)
1258 || !add_dynamic_entry (DT_JMPREL, 0))
1264 if (!add_dynamic_entry (DT_RELA, 0)
1265 || !add_dynamic_entry (DT_RELASZ, 0)
1266 || !add_dynamic_entry (DT_RELAENT, sizeof (Elf32_External_Rela)))
1270 if (reltext || (info->flags & DF_TEXTREL) != 0)
1272 if (!add_dynamic_entry (DT_TEXTREL, 0))
1276 #undef add_dynamic_entry
1281 /* This function is called via elf_vax_link_hash_traverse if we are
1282 creating a shared object with -Bsymbolic. It discards the space
1283 allocated to copy PC relative relocs against symbols which are defined
1284 in regular objects. We allocated space for them in the check_relocs
1285 routine, but we won't fill them in in the relocate_section routine. */
1288 elf_vax_discard_copies (struct elf_vax_link_hash_entry *h,
1289 void * ignore ATTRIBUTE_UNUSED)
1291 struct elf_vax_pcrel_relocs_copied *s;
1293 /* We only discard relocs for symbols defined in a regular object. */
1294 if (!h->root.def_regular)
1297 for (s = h->pcrel_relocs_copied; s != NULL; s = s->next)
1298 s->section->size -= s->count * sizeof (Elf32_External_Rela);
1303 /* This function is called via elf_link_hash_traverse. It looks for
1304 entries that have GOT or PLT (.GOT) references. If creating a shared
1305 object with -Bsymbolic, or the symbol has been forced local, then it
1306 resets the reference count back to -1 so normal PC32 relocation will
1307 be done. Otherwise space in the .got and .rela.got will be reserved
1311 elf_vax_instantiate_got_entries (struct elf_link_hash_entry *h, void * infoptr)
1313 struct bfd_link_info *info = (struct bfd_link_info *) infoptr;
1318 /* We don't care about non-GOT (and non-PLT) entries. */
1319 if (h->got.refcount <= 0 && h->plt.refcount <= 0)
1322 dynobj = elf_hash_table (info)->dynobj;
1323 BFD_ASSERT (dynobj != NULL);
1325 sgot = bfd_get_linker_section (dynobj, ".got");
1326 srelgot = bfd_get_linker_section (dynobj, ".rela.got");
1328 if (SYMBOL_REFERENCES_LOCAL (info, h))
1330 h->got.refcount = -1;
1331 h->plt.refcount = -1;
1333 else if (h->got.refcount > 0)
1335 /* Make sure this symbol is output as a dynamic symbol. */
1336 if (h->dynindx == -1)
1338 if (!bfd_elf_link_record_dynamic_symbol (info, h))
1342 /* Allocate space in the .got and .rela.got sections. */
1344 srelgot->size += sizeof (Elf32_External_Rela);
1350 /* Relocate an VAX ELF section. */
1353 elf_vax_relocate_section (bfd *output_bfd,
1354 struct bfd_link_info *info,
1356 asection *input_section,
1358 Elf_Internal_Rela *relocs,
1359 Elf_Internal_Sym *local_syms,
1360 asection **local_sections)
1363 Elf_Internal_Shdr *symtab_hdr;
1364 struct elf_link_hash_entry **sym_hashes;
1371 Elf_Internal_Rela *rel;
1372 Elf_Internal_Rela *relend;
1374 dynobj = elf_hash_table (info)->dynobj;
1375 symtab_hdr = &elf_tdata (input_bfd)->symtab_hdr;
1376 sym_hashes = elf_sym_hashes (input_bfd);
1384 relend = relocs + input_section->reloc_count;
1385 for (; rel < relend; rel++)
1388 reloc_howto_type *howto;
1389 unsigned long r_symndx;
1390 struct elf_link_hash_entry *h;
1391 Elf_Internal_Sym *sym;
1394 bfd_reloc_status_type r;
1396 r_type = ELF32_R_TYPE (rel->r_info);
1397 if (r_type < 0 || r_type >= (int) R_VAX_max)
1399 bfd_set_error (bfd_error_bad_value);
1402 howto = howto_table + r_type;
1404 r_symndx = ELF32_R_SYM (rel->r_info);
1408 if (r_symndx < symtab_hdr->sh_info)
1410 sym = local_syms + r_symndx;
1411 sec = local_sections[r_symndx];
1412 relocation = _bfd_elf_rela_local_sym (output_bfd, sym, &sec, rel);
1416 bfd_boolean unresolved_reloc;
1417 bfd_boolean warned, ignored;
1419 RELOC_FOR_GLOBAL_SYMBOL (info, input_bfd, input_section, rel,
1420 r_symndx, symtab_hdr, sym_hashes,
1422 unresolved_reloc, warned, ignored);
1424 if ((h->root.type == bfd_link_hash_defined
1425 || h->root.type == bfd_link_hash_defweak)
1426 && ((r_type == R_VAX_PLT32
1427 && h->plt.offset != (bfd_vma) -1
1429 && elf_hash_table (info)->dynamic_sections_created)
1430 || (r_type == R_VAX_GOT32
1431 && h->got.offset != (bfd_vma) -1
1433 && elf_hash_table (info)->dynamic_sections_created
1434 && (! bfd_link_pic (info)
1435 || (! info->symbolic && h->dynindx != -1)
1436 || !h->def_regular))
1437 || (bfd_link_pic (info)
1438 && ((! info->symbolic && h->dynindx != -1)
1440 && ((input_section->flags & SEC_ALLOC) != 0
1441 /* DWARF will emit R_VAX_32 relocations in its
1442 sections against symbols defined externally
1443 in shared libraries. We can't do anything
1446 || ((input_section->flags & SEC_DEBUGGING) != 0
1448 && (r_type == R_VAX_8
1449 || r_type == R_VAX_16
1450 || r_type == R_VAX_32))))
1451 /* In these cases, we don't need the relocation
1452 value. We check specially because in some
1453 obscure cases sec->output_section will be NULL. */
1457 if (sec != NULL && discarded_section (sec))
1458 RELOC_AGAINST_DISCARDED_SECTION (info, input_bfd, input_section,
1459 rel, 1, relend, howto, 0, contents);
1461 if (bfd_link_relocatable (info))
1467 /* Relocation is to the address of the entry for this symbol
1468 in the global offset table. */
1470 /* Resolve a GOTxx reloc against a local symbol directly,
1471 without using the global offset table. */
1473 || h->got.offset == (bfd_vma) -1)
1481 sgot = bfd_get_linker_section (dynobj, ".got");
1482 BFD_ASSERT (sgot != NULL);
1485 off = h->got.offset;
1486 BFD_ASSERT (off < sgot->size);
1488 bfd_put_32 (output_bfd, rel->r_addend, sgot->contents + off);
1490 relocation = sgot->output_offset + off;
1491 /* The GOT relocation uses the addend. */
1494 /* Change the reference to be indirect. */
1495 contents[rel->r_offset - 1] |= 0x10;
1496 relocation += sgot->output_section->vma;
1501 /* If we are creating an executable and the function this
1502 reloc refers to is in a shared lib, then we made a PLT
1503 entry for this symbol and need to handle the reloc like
1505 if (bfd_link_pic (info))
1506 goto r_vax_pc32_shared;
1509 /* Relocation is to the entry for this symbol in the
1510 procedure linkage table. */
1512 /* Resolve a PLTxx reloc against a local symbol directly,
1513 without using the procedure linkage table. */
1515 || h->plt.offset == (bfd_vma) -1)
1520 splt = bfd_get_linker_section (dynobj, ".plt");
1521 BFD_ASSERT (splt != NULL);
1524 if (sgotplt == NULL)
1526 sgotplt = bfd_get_linker_section (dynobj, ".got.plt");
1527 BFD_ASSERT (sgotplt != NULL);
1530 plt_index = h->plt.offset / PLT_ENTRY_SIZE - 1;
1532 /* Get the offset into the .got table of the entry that
1533 corresponds to this function. Each .got entry is 4 bytes.
1534 The first two are reserved. */
1535 got_offset = (plt_index + 3) * 4;
1537 /* We want the relocation to point into the .got.plt instead
1538 of the plt itself. */
1539 relocation = (sgotplt->output_section->vma
1540 + sgotplt->output_offset
1542 contents[rel->r_offset-1] |= 0x10; /* make indirect */
1543 if (rel->r_addend == 2)
1547 else if (rel->r_addend != 0)
1548 (*_bfd_error_handler)
1549 (_("%s: warning: PLT addend of %d to `%s' from %s section ignored"),
1550 bfd_get_filename (input_bfd), rel->r_addend,
1551 h->root.root.string,
1552 bfd_get_section_name (input_bfd, input_section));
1561 || ELF_ST_VISIBILITY (h->other) != STV_DEFAULT
1568 if (bfd_link_pic (info)
1569 && r_symndx != STN_UNDEF
1570 && (input_section->flags & SEC_ALLOC) != 0
1571 && ((r_type != R_VAX_PC8
1572 && r_type != R_VAX_PC16
1573 && r_type != R_VAX_PC32)
1574 || ((input_section->flags & SEC_CODE)
1576 || (!h->def_regular && h->type != STT_SECTION)))))
1578 Elf_Internal_Rela outrel;
1580 bfd_boolean skip, relocate;
1582 /* When generating a shared object, these relocations
1583 are copied into the output file to be resolved at run
1587 sreloc = _bfd_elf_get_dynamic_reloc_section
1588 (input_bfd, input_section, /*rela?*/ TRUE);
1597 _bfd_elf_section_offset (output_bfd, info, input_section,
1599 if (outrel.r_offset == (bfd_vma) -1)
1601 if (outrel.r_offset == (bfd_vma) -2)
1602 skip = TRUE, relocate = TRUE;
1603 outrel.r_offset += (input_section->output_section->vma
1604 + input_section->output_offset);
1607 memset (&outrel, 0, sizeof outrel);
1608 /* h->dynindx may be -1 if the symbol was marked to
1611 && ((! info->symbolic && h->dynindx != -1)
1612 || !h->def_regular))
1614 BFD_ASSERT (h->dynindx != -1);
1615 outrel.r_info = ELF32_R_INFO (h->dynindx, r_type);
1616 outrel.r_addend = relocation + rel->r_addend;
1620 if (r_type == R_VAX_32)
1623 outrel.r_info = ELF32_R_INFO (0, R_VAX_RELATIVE);
1624 BFD_ASSERT (bfd_get_signed_32 (input_bfd,
1625 &contents[rel->r_offset]) == 0);
1626 outrel.r_addend = relocation + rel->r_addend;
1632 if (bfd_is_abs_section (sec))
1634 else if (sec == NULL || sec->owner == NULL)
1636 bfd_set_error (bfd_error_bad_value);
1643 /* We are turning this relocation into one
1644 against a section symbol. It would be
1645 proper to subtract the symbol's value,
1646 osec->vma, from the emitted reloc addend,
1647 but ld.so expects buggy relocs. */
1648 osec = sec->output_section;
1649 indx = elf_section_data (osec)->dynindx;
1652 struct elf_link_hash_table *htab;
1653 htab = elf_hash_table (info);
1654 osec = htab->text_index_section;
1655 indx = elf_section_data (osec)->dynindx;
1657 BFD_ASSERT (indx != 0);
1660 outrel.r_info = ELF32_R_INFO (indx, r_type);
1661 outrel.r_addend = relocation + rel->r_addend;
1665 if ((input_section->flags & SEC_CODE) != 0
1666 || (ELF32_R_TYPE (outrel.r_info) != R_VAX_32
1667 && ELF32_R_TYPE (outrel.r_info) != R_VAX_RELATIVE
1668 && ELF32_R_TYPE (outrel.r_info) != R_VAX_COPY
1669 && ELF32_R_TYPE (outrel.r_info) != R_VAX_JMP_SLOT
1670 && ELF32_R_TYPE (outrel.r_info) != R_VAX_GLOB_DAT))
1673 (*_bfd_error_handler)
1674 (_("%s: warning: %s relocation against symbol `%s' from %s section"),
1675 bfd_get_filename (input_bfd), howto->name,
1676 h->root.root.string,
1677 bfd_get_section_name (input_bfd, input_section));
1679 (*_bfd_error_handler)
1680 (_("%s: warning: %s relocation to 0x%x from %s section"),
1681 bfd_get_filename (input_bfd), howto->name,
1683 bfd_get_section_name (input_bfd, input_section));
1685 loc = sreloc->contents;
1686 loc += sreloc->reloc_count++ * sizeof (Elf32_External_Rela);
1687 bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc);
1689 /* This reloc will be computed at runtime, so there's no
1690 need to do anything now, except for R_VAX_32
1691 relocations that have been turned into
1699 case R_VAX_GNU_VTINHERIT:
1700 case R_VAX_GNU_VTENTRY:
1701 /* These are no-ops in the end. */
1708 /* VAX PCREL relocations are from the end of relocation, not the start.
1709 So subtract the difference from the relocation amount since we can't
1710 add it to the offset. */
1711 if (howto->pc_relative && howto->pcrel_offset)
1712 relocation -= bfd_get_reloc_size(howto);
1714 r = _bfd_final_link_relocate (howto, input_bfd, input_section,
1715 contents, rel->r_offset,
1716 relocation, rel->r_addend);
1718 if (r != bfd_reloc_ok)
1723 case bfd_reloc_outofrange:
1725 case bfd_reloc_overflow:
1733 name = bfd_elf_string_from_elf_section (input_bfd,
1734 symtab_hdr->sh_link,
1739 name = bfd_section_name (input_bfd, sec);
1741 info->callbacks->reloc_overflow
1742 (info, (h ? &h->root : NULL), name, howto->name,
1743 (bfd_vma) 0, input_bfd, input_section, rel->r_offset);
1753 /* Finish up dynamic symbol handling. We set the contents of various
1754 dynamic sections here. */
1757 elf_vax_finish_dynamic_symbol (bfd *output_bfd, struct bfd_link_info *info,
1758 struct elf_link_hash_entry *h,
1759 Elf_Internal_Sym *sym)
1763 dynobj = elf_hash_table (info)->dynobj;
1765 if (h->plt.offset != (bfd_vma) -1)
1773 Elf_Internal_Rela rela;
1776 /* This symbol has an entry in the procedure linkage table. Set
1778 BFD_ASSERT (h->dynindx != -1);
1780 splt = bfd_get_linker_section (dynobj, ".plt");
1781 sgot = bfd_get_linker_section (dynobj, ".got.plt");
1782 srela = bfd_get_linker_section (dynobj, ".rela.plt");
1783 BFD_ASSERT (splt != NULL && sgot != NULL && srela != NULL);
1785 addend = 2 * (h->plt.offset & 1);
1786 h->plt.offset &= ~1;
1788 /* Get the index in the procedure linkage table which
1789 corresponds to this symbol. This is the index of this symbol
1790 in all the symbols for which we are making plt entries. The
1791 first entry in the procedure linkage table is reserved. */
1792 plt_index = h->plt.offset / PLT_ENTRY_SIZE - 1;
1794 /* Get the offset into the .got table of the entry that
1795 corresponds to this function. Each .got entry is 4 bytes.
1796 The first two are reserved. */
1797 got_offset = (plt_index + 3) * 4;
1799 /* Fill in the entry in the procedure linkage table. */
1800 memcpy (splt->contents + h->plt.offset, elf_vax_plt_entry,
1803 /* The offset is relative to the first extension word. */
1804 bfd_put_32 (output_bfd,
1805 -(h->plt.offset + 8),
1806 splt->contents + h->plt.offset + 4);
1808 bfd_put_32 (output_bfd, plt_index * sizeof (Elf32_External_Rela),
1809 splt->contents + h->plt.offset + 8);
1811 /* Fill in the entry in the global offset table. */
1812 bfd_put_32 (output_bfd,
1813 (splt->output_section->vma
1814 + splt->output_offset
1815 + h->plt.offset) + addend,
1816 sgot->contents + got_offset);
1818 /* Fill in the entry in the .rela.plt section. */
1819 rela.r_offset = (sgot->output_section->vma
1820 + sgot->output_offset
1822 rela.r_info = ELF32_R_INFO (h->dynindx, R_VAX_JMP_SLOT);
1823 rela.r_addend = addend;
1824 loc = srela->contents + plt_index * sizeof (Elf32_External_Rela);
1825 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
1827 if (!h->def_regular)
1829 /* Mark the symbol as undefined, rather than as defined in
1830 the .plt section. Leave the value alone. */
1831 sym->st_shndx = SHN_UNDEF;
1835 if (h->got.offset != (bfd_vma) -1)
1839 Elf_Internal_Rela rela;
1842 /* This symbol has an entry in the global offset table. Set it
1844 sgot = bfd_get_linker_section (dynobj, ".got");
1845 srela = bfd_get_linker_section (dynobj, ".rela.got");
1846 BFD_ASSERT (sgot != NULL && srela != NULL);
1848 rela.r_offset = (sgot->output_section->vma
1849 + sgot->output_offset
1851 rela.r_info = ELF32_R_INFO (h->dynindx, R_VAX_GLOB_DAT);
1852 rela.r_addend = bfd_get_signed_32 (output_bfd,
1853 sgot->contents + h->got.offset);
1855 loc = srela->contents;
1856 loc += srela->reloc_count++ * sizeof (Elf32_External_Rela);
1857 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
1863 Elf_Internal_Rela rela;
1866 /* This symbol needs a copy reloc. Set it up. */
1867 BFD_ASSERT (h->dynindx != -1
1868 && (h->root.type == bfd_link_hash_defined
1869 || h->root.type == bfd_link_hash_defweak));
1871 s = bfd_get_linker_section (dynobj, ".rela.bss");
1872 BFD_ASSERT (s != NULL);
1874 rela.r_offset = (h->root.u.def.value
1875 + h->root.u.def.section->output_section->vma
1876 + h->root.u.def.section->output_offset);
1877 rela.r_info = ELF32_R_INFO (h->dynindx, R_VAX_COPY);
1879 loc = s->contents + s->reloc_count++ * sizeof (Elf32_External_Rela);
1880 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
1883 /* Mark _DYNAMIC and _GLOBAL_OFFSET_TABLE_ as absolute. */
1884 if (h == elf_hash_table (info)->hdynamic
1885 || h == elf_hash_table (info)->hgot)
1886 sym->st_shndx = SHN_ABS;
1891 /* Finish up the dynamic sections. */
1894 elf_vax_finish_dynamic_sections (bfd *output_bfd, struct bfd_link_info *info)
1900 dynobj = elf_hash_table (info)->dynobj;
1902 sgot = bfd_get_linker_section (dynobj, ".got.plt");
1903 BFD_ASSERT (sgot != NULL);
1904 sdyn = bfd_get_linker_section (dynobj, ".dynamic");
1906 if (elf_hash_table (info)->dynamic_sections_created)
1909 Elf32_External_Dyn *dyncon, *dynconend;
1911 splt = bfd_get_linker_section (dynobj, ".plt");
1912 BFD_ASSERT (splt != NULL && sdyn != NULL);
1914 dyncon = (Elf32_External_Dyn *) sdyn->contents;
1915 dynconend = (Elf32_External_Dyn *) (sdyn->contents + sdyn->size);
1916 for (; dyncon < dynconend; dyncon++)
1918 Elf_Internal_Dyn dyn;
1922 bfd_elf32_swap_dyn_in (dynobj, dyncon, &dyn);
1935 s = bfd_get_linker_section (dynobj, name);
1936 dyn.d_un.d_ptr = s->output_section->vma + s->output_offset;
1937 bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon);
1941 s = bfd_get_linker_section (dynobj, ".rela.plt");
1942 dyn.d_un.d_val = s->size;
1943 bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon);
1947 /* The procedure linkage table relocs (DT_JMPREL) should
1948 not be included in the overall relocs (DT_RELA).
1949 Therefore, we override the DT_RELASZ entry here to
1950 make it not include the JMPREL relocs. Since the
1951 linker script arranges for .rela.plt to follow all
1952 other relocation sections, we don't have to worry
1953 about changing the DT_RELA entry. */
1954 s = bfd_get_linker_section (dynobj, ".rela.plt");
1956 dyn.d_un.d_val -= s->size;
1957 bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon);
1962 /* Fill in the first entry in the procedure linkage table. */
1965 memcpy (splt->contents, elf_vax_plt0_entry, PLT_ENTRY_SIZE);
1966 bfd_put_32 (output_bfd,
1967 (sgot->output_section->vma
1968 + sgot->output_offset + 4
1969 - (splt->output_section->vma + 6)),
1970 splt->contents + 2);
1971 bfd_put_32 (output_bfd,
1972 (sgot->output_section->vma
1973 + sgot->output_offset + 8
1974 - (splt->output_section->vma + 12)),
1975 splt->contents + 8);
1976 elf_section_data (splt->output_section)->this_hdr.sh_entsize
1981 /* Fill in the first three entries in the global offset table. */
1985 bfd_put_32 (output_bfd, (bfd_vma) 0, sgot->contents);
1987 bfd_put_32 (output_bfd,
1988 sdyn->output_section->vma + sdyn->output_offset,
1990 bfd_put_32 (output_bfd, (bfd_vma) 0, sgot->contents + 4);
1991 bfd_put_32 (output_bfd, (bfd_vma) 0, sgot->contents + 8);
1994 if (elf_section_data (sgot->output_section) != NULL)
1995 elf_section_data (sgot->output_section)->this_hdr.sh_entsize = 4;
2000 static enum elf_reloc_type_class
2001 elf_vax_reloc_type_class (const struct bfd_link_info *info ATTRIBUTE_UNUSED,
2002 const asection *rel_sec ATTRIBUTE_UNUSED,
2003 const Elf_Internal_Rela *rela)
2005 switch ((int) ELF32_R_TYPE (rela->r_info))
2007 case R_VAX_RELATIVE:
2008 return reloc_class_relative;
2009 case R_VAX_JMP_SLOT:
2010 return reloc_class_plt;
2012 return reloc_class_copy;
2014 return reloc_class_normal;
2019 elf_vax_plt_sym_val (bfd_vma i, const asection *plt,
2020 const arelent *rel ATTRIBUTE_UNUSED)
2022 return plt->vma + (i + 1) * PLT_ENTRY_SIZE;
2025 #define TARGET_LITTLE_SYM vax_elf32_vec
2026 #define TARGET_LITTLE_NAME "elf32-vax"
2027 #define ELF_MACHINE_CODE EM_VAX
2028 #define ELF_MAXPAGESIZE 0x1000
2030 #define elf_backend_create_dynamic_sections \
2031 _bfd_elf_create_dynamic_sections
2032 #define bfd_elf32_bfd_link_hash_table_create \
2033 elf_vax_link_hash_table_create
2034 #define bfd_elf32_bfd_final_link bfd_elf_gc_common_final_link
2036 #define elf_backend_check_relocs elf_vax_check_relocs
2037 #define elf_backend_adjust_dynamic_symbol \
2038 elf_vax_adjust_dynamic_symbol
2039 #define elf_backend_always_size_sections \
2040 elf_vax_always_size_sections
2041 #define elf_backend_size_dynamic_sections \
2042 elf_vax_size_dynamic_sections
2043 #define elf_backend_init_index_section _bfd_elf_init_1_index_section
2044 #define elf_backend_relocate_section elf_vax_relocate_section
2045 #define elf_backend_finish_dynamic_symbol \
2046 elf_vax_finish_dynamic_symbol
2047 #define elf_backend_finish_dynamic_sections \
2048 elf_vax_finish_dynamic_sections
2049 #define elf_backend_reloc_type_class elf_vax_reloc_type_class
2050 #define elf_backend_gc_mark_hook elf_vax_gc_mark_hook
2051 #define elf_backend_gc_sweep_hook elf_vax_gc_sweep_hook
2052 #define elf_backend_plt_sym_val elf_vax_plt_sym_val
2053 #define bfd_elf32_bfd_merge_private_bfd_data \
2054 elf32_vax_merge_private_bfd_data
2055 #define bfd_elf32_bfd_set_private_flags \
2056 elf32_vax_set_private_flags
2057 #define bfd_elf32_bfd_print_private_bfd_data \
2058 elf32_vax_print_private_bfd_data
2060 #define elf_backend_can_gc_sections 1
2061 #define elf_backend_want_got_plt 1
2062 #define elf_backend_plt_readonly 1
2063 #define elf_backend_want_plt_sym 0
2064 #define elf_backend_got_header_size 16
2065 #define elf_backend_rela_normal 1
2067 #include "elf32-target.h"