1 /* VAX series support for 32-bit ELF
2 Copyright 1993, 1995, 1996, 1997, 1998, 1999, 2000, 2001, 2002, 2003,
3 2004, 2005, 2006, 2007, 2008, 2009, 2010, 2011, 2012
4 Free Software Foundation, Inc.
5 Contributed by Matt Thomas <matt@3am-software.com>.
7 This file is part of BFD, the Binary File Descriptor library.
9 This program is free software; you can redistribute it and/or modify
10 it under the terms of the GNU General Public License as published by
11 the Free Software Foundation; either version 3 of the License, or
12 (at your option) any later version.
14 This program is distributed in the hope that it will be useful,
15 but WITHOUT ANY WARRANTY; without even the implied warranty of
16 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
17 GNU General Public License for more details.
19 You should have received a copy of the GNU General Public License
20 along with this program; if not, write to the Free Software
21 Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston,
22 MA 02110-1301, USA. */
31 static reloc_howto_type *reloc_type_lookup (bfd *, bfd_reloc_code_real_type);
32 static void rtype_to_howto (bfd *, arelent *, Elf_Internal_Rela *);
33 static struct bfd_hash_entry *elf_vax_link_hash_newfunc (struct bfd_hash_entry *,
34 struct bfd_hash_table *,
36 static struct bfd_link_hash_table *elf_vax_link_hash_table_create (bfd *);
37 static bfd_boolean elf_vax_check_relocs (bfd *, struct bfd_link_info *,
38 asection *, const Elf_Internal_Rela *);
39 static bfd_boolean elf_vax_adjust_dynamic_symbol (struct bfd_link_info *,
40 struct elf_link_hash_entry *);
41 static bfd_boolean elf_vax_size_dynamic_sections (bfd *, struct bfd_link_info *);
42 static bfd_boolean elf_vax_relocate_section (bfd *, struct bfd_link_info *,
43 bfd *, asection *, bfd_byte *,
45 Elf_Internal_Sym *, asection **);
46 static bfd_boolean elf_vax_finish_dynamic_symbol (bfd *, struct bfd_link_info *,
47 struct elf_link_hash_entry *,
49 static bfd_boolean elf_vax_finish_dynamic_sections (bfd *,
50 struct bfd_link_info *);
51 static bfd_vma elf_vax_plt_sym_val (bfd_vma, const asection *,
54 static bfd_boolean elf32_vax_set_private_flags (bfd *, flagword);
55 static bfd_boolean elf32_vax_merge_private_bfd_data (bfd *, bfd *);
56 static bfd_boolean elf32_vax_print_private_bfd_data (bfd *, PTR);
58 static reloc_howto_type howto_table[] = {
59 HOWTO (R_VAX_NONE, /* type */
61 0, /* size (0 = byte, 1 = short, 2 = long) */
63 FALSE, /* pc_relative */
65 complain_overflow_dont, /* complain_on_overflow */
66 bfd_elf_generic_reloc, /* special_function */
67 "R_VAX_NONE", /* name */
68 FALSE, /* partial_inplace */
70 0x00000000, /* dst_mask */
71 FALSE), /* pcrel_offset */
73 HOWTO (R_VAX_32, /* type */
75 2, /* size (0 = byte, 1 = short, 2 = long) */
77 FALSE, /* pc_relative */
79 complain_overflow_bitfield, /* complain_on_overflow */
80 bfd_elf_generic_reloc, /* special_function */
81 "R_VAX_32", /* name */
82 FALSE, /* partial_inplace */
84 0xffffffff, /* dst_mask */
85 FALSE), /* pcrel_offset */
87 HOWTO (R_VAX_16, /* type */
89 1, /* size (0 = byte, 1 = short, 2 = long) */
91 FALSE, /* pc_relative */
93 complain_overflow_bitfield, /* complain_on_overflow */
94 bfd_elf_generic_reloc, /* special_function */
95 "R_VAX_16", /* name */
96 FALSE, /* partial_inplace */
98 0x0000ffff, /* dst_mask */
99 FALSE), /* pcrel_offset */
101 HOWTO (R_VAX_8, /* type */
103 0, /* size (0 = byte, 1 = short, 2 = long) */
105 FALSE, /* pc_relative */
107 complain_overflow_bitfield, /* complain_on_overflow */
108 bfd_elf_generic_reloc, /* special_function */
109 "R_VAX_8", /* name */
110 FALSE, /* partial_inplace */
112 0x000000ff, /* dst_mask */
113 FALSE), /* pcrel_offset */
115 HOWTO (R_VAX_PC32, /* type */
117 2, /* size (0 = byte, 1 = short, 2 = long) */
119 TRUE, /* pc_relative */
121 complain_overflow_bitfield, /* complain_on_overflow */
122 bfd_elf_generic_reloc, /* special_function */
123 "R_VAX_PC32", /* name */
124 FALSE, /* partial_inplace */
126 0xffffffff, /* dst_mask */
127 TRUE), /* pcrel_offset */
129 HOWTO (R_VAX_PC16, /* type */
131 1, /* size (0 = byte, 1 = short, 2 = long) */
133 TRUE, /* pc_relative */
135 complain_overflow_signed, /* complain_on_overflow */
136 bfd_elf_generic_reloc, /* special_function */
137 "R_VAX_PC16", /* name */
138 FALSE, /* partial_inplace */
140 0x0000ffff, /* dst_mask */
141 TRUE), /* pcrel_offset */
143 HOWTO (R_VAX_PC8, /* type */
145 0, /* size (0 = byte, 1 = short, 2 = long) */
147 TRUE, /* pc_relative */
149 complain_overflow_signed, /* complain_on_overflow */
150 bfd_elf_generic_reloc, /* special_function */
151 "R_VAX_PC8", /* name */
152 FALSE, /* partial_inplace */
154 0x000000ff, /* dst_mask */
155 TRUE), /* pcrel_offset */
157 HOWTO (R_VAX_GOT32, /* type */
159 2, /* size (0 = byte, 1 = short, 2 = long) */
161 TRUE, /* pc_relative */
163 complain_overflow_bitfield, /* complain_on_overflow */
164 bfd_elf_generic_reloc, /* special_function */
165 "R_VAX_GOT32", /* name */
166 FALSE, /* partial_inplace */
168 0xffffffff, /* dst_mask */
169 TRUE), /* pcrel_offset */
177 HOWTO (R_VAX_PLT32, /* type */
179 2, /* size (0 = byte, 1 = short, 2 = long) */
181 TRUE, /* pc_relative */
183 complain_overflow_bitfield, /* complain_on_overflow */
184 bfd_elf_generic_reloc, /* special_function */
185 "R_VAX_PLT32", /* name */
186 FALSE, /* partial_inplace */
188 0xffffffff, /* dst_mask */
189 TRUE), /* pcrel_offset */
197 HOWTO (R_VAX_COPY, /* type */
199 0, /* size (0 = byte, 1 = short, 2 = long) */
201 FALSE, /* pc_relative */
203 complain_overflow_dont, /* complain_on_overflow */
204 bfd_elf_generic_reloc, /* special_function */
205 "R_VAX_COPY", /* name */
206 FALSE, /* partial_inplace */
208 0xffffffff, /* dst_mask */
209 FALSE), /* pcrel_offset */
211 HOWTO (R_VAX_GLOB_DAT, /* type */
213 2, /* size (0 = byte, 1 = short, 2 = long) */
215 FALSE, /* pc_relative */
217 complain_overflow_dont, /* complain_on_overflow */
218 bfd_elf_generic_reloc, /* special_function */
219 "R_VAX_GLOB_DAT", /* name */
220 FALSE, /* partial_inplace */
222 0xffffffff, /* dst_mask */
223 FALSE), /* pcrel_offset */
225 HOWTO (R_VAX_JMP_SLOT, /* type */
227 2, /* size (0 = byte, 1 = short, 2 = long) */
229 FALSE, /* pc_relative */
231 complain_overflow_dont, /* complain_on_overflow */
232 bfd_elf_generic_reloc, /* special_function */
233 "R_VAX_JMP_SLOT", /* name */
234 FALSE, /* partial_inplace */
236 0xffffffff, /* dst_mask */
237 FALSE), /* pcrel_offset */
239 HOWTO (R_VAX_RELATIVE, /* type */
241 2, /* size (0 = byte, 1 = short, 2 = long) */
243 FALSE, /* pc_relative */
245 complain_overflow_dont, /* complain_on_overflow */
246 bfd_elf_generic_reloc, /* special_function */
247 "R_VAX_RELATIVE", /* name */
248 FALSE, /* partial_inplace */
250 0xffffffff, /* dst_mask */
251 FALSE), /* pcrel_offset */
253 /* GNU extension to record C++ vtable hierarchy */
254 HOWTO (R_VAX_GNU_VTINHERIT, /* type */
256 2, /* size (0 = byte, 1 = short, 2 = long) */
258 FALSE, /* pc_relative */
260 complain_overflow_dont, /* complain_on_overflow */
261 NULL, /* special_function */
262 "R_VAX_GNU_VTINHERIT", /* name */
263 FALSE, /* partial_inplace */
266 FALSE), /* pcrel_offset */
268 /* GNU extension to record C++ vtable member usage */
269 HOWTO (R_VAX_GNU_VTENTRY, /* type */
271 2, /* size (0 = byte, 1 = short, 2 = long) */
273 FALSE, /* pc_relative */
275 complain_overflow_dont, /* complain_on_overflow */
276 _bfd_elf_rel_vtable_reloc_fn, /* special_function */
277 "R_VAX_GNU_VTENTRY", /* name */
278 FALSE, /* partial_inplace */
281 FALSE), /* pcrel_offset */
285 rtype_to_howto (bfd *abfd ATTRIBUTE_UNUSED, arelent *cache_ptr,
286 Elf_Internal_Rela *dst)
288 BFD_ASSERT (ELF32_R_TYPE(dst->r_info) < (unsigned int) R_VAX_max);
289 cache_ptr->howto = &howto_table[ELF32_R_TYPE(dst->r_info)];
292 #define elf_info_to_howto rtype_to_howto
296 bfd_reloc_code_real_type bfd_val;
299 { BFD_RELOC_NONE, R_VAX_NONE },
300 { BFD_RELOC_32, R_VAX_32 },
301 { BFD_RELOC_16, R_VAX_16 },
302 { BFD_RELOC_8, R_VAX_8 },
303 { BFD_RELOC_32_PCREL, R_VAX_PC32 },
304 { BFD_RELOC_16_PCREL, R_VAX_PC16 },
305 { BFD_RELOC_8_PCREL, R_VAX_PC8 },
306 { BFD_RELOC_32_GOT_PCREL, R_VAX_GOT32 },
307 { BFD_RELOC_32_PLT_PCREL, R_VAX_PLT32 },
308 { BFD_RELOC_NONE, R_VAX_COPY },
309 { BFD_RELOC_VAX_GLOB_DAT, R_VAX_GLOB_DAT },
310 { BFD_RELOC_VAX_JMP_SLOT, R_VAX_JMP_SLOT },
311 { BFD_RELOC_VAX_RELATIVE, R_VAX_RELATIVE },
312 { BFD_RELOC_CTOR, R_VAX_32 },
313 { BFD_RELOC_VTABLE_INHERIT, R_VAX_GNU_VTINHERIT },
314 { BFD_RELOC_VTABLE_ENTRY, R_VAX_GNU_VTENTRY },
317 static reloc_howto_type *
318 reloc_type_lookup (bfd *abfd ATTRIBUTE_UNUSED, bfd_reloc_code_real_type code)
321 for (i = 0; i < sizeof (reloc_map) / sizeof (reloc_map[0]); i++)
323 if (reloc_map[i].bfd_val == code)
324 return &howto_table[reloc_map[i].elf_val];
329 static reloc_howto_type *
330 reloc_name_lookup (bfd *abfd ATTRIBUTE_UNUSED,
335 for (i = 0; i < sizeof (howto_table) / sizeof (howto_table[0]); i++)
336 if (howto_table[i].name != NULL
337 && strcasecmp (howto_table[i].name, r_name) == 0)
338 return &howto_table[i];
343 #define bfd_elf32_bfd_reloc_type_lookup reloc_type_lookup
344 #define bfd_elf32_bfd_reloc_name_lookup reloc_name_lookup
345 #define ELF_ARCH bfd_arch_vax
346 /* end code generated by elf.el */
348 /* Functions for the VAX ELF linker. */
350 /* The name of the dynamic interpreter. This is put in the .interp
353 #define ELF_DYNAMIC_INTERPRETER "/usr/libexec/ld.elf_so"
355 /* The size in bytes of an entry in the procedure linkage table. */
357 #define PLT_ENTRY_SIZE 12
359 /* The first entry in a procedure linkage table looks like this. See
360 the SVR4 ABI VAX supplement to see how this works. */
362 static const bfd_byte elf_vax_plt0_entry[PLT_ENTRY_SIZE] =
364 0xdd, 0xef, /* pushl l^ */
365 0, 0, 0, 0, /* offset to .plt.got + 4 */
366 0x17, 0xff, /* jmp @L^(pc) */
367 0, 0, 0, 0, /* offset to .plt.got + 8 */
370 /* Subsequent entries in a procedure linkage table look like this. */
372 static const bfd_byte elf_vax_plt_entry[PLT_ENTRY_SIZE] =
374 0xfc, 0x0f, /* .word ^M<r11:r2> */
375 0x16, 0xef, /* jsb L^(pc) */
376 0, 0, 0, 0, /* replaced with offset to start of .plt */
377 0, 0, 0, 0, /* index into .rela.plt */
380 /* The VAX linker needs to keep track of the number of relocs that it
381 decides to copy in check_relocs for each symbol. This is so that it
382 can discard PC relative relocs if it doesn't need them when linking
383 with -Bsymbolic. We store the information in a field extending the
384 regular ELF linker hash table. */
386 /* This structure keeps track of the number of PC relative relocs we have
387 copied for a given symbol. */
389 struct elf_vax_pcrel_relocs_copied
392 struct elf_vax_pcrel_relocs_copied *next;
393 /* A section in dynobj. */
395 /* Number of relocs copied in this section. */
399 /* VAX ELF linker hash entry. */
401 struct elf_vax_link_hash_entry
403 struct elf_link_hash_entry root;
405 /* Number of PC relative relocs copied for this symbol. */
406 struct elf_vax_pcrel_relocs_copied *pcrel_relocs_copied;
411 /* Declare this now that the above structures are defined. */
413 static bfd_boolean elf_vax_discard_copies (struct elf_vax_link_hash_entry *,
416 /* Declare this now that the above structures are defined. */
418 static bfd_boolean elf_vax_instantiate_got_entries (struct elf_link_hash_entry *,
421 /* Traverse an VAX ELF linker hash table. */
423 #define elf_vax_link_hash_traverse(table, func, info) \
424 (elf_link_hash_traverse \
426 (bfd_boolean (*) (struct elf_link_hash_entry *, PTR)) (func), \
429 /* Create an entry in an VAX ELF linker hash table. */
431 static struct bfd_hash_entry *
432 elf_vax_link_hash_newfunc (struct bfd_hash_entry *entry,
433 struct bfd_hash_table *table,
436 struct elf_vax_link_hash_entry *ret =
437 (struct elf_vax_link_hash_entry *) entry;
439 /* Allocate the structure if it has not already been allocated by a
442 ret = ((struct elf_vax_link_hash_entry *)
443 bfd_hash_allocate (table,
444 sizeof (struct elf_vax_link_hash_entry)));
446 return (struct bfd_hash_entry *) ret;
448 /* Call the allocation method of the superclass. */
449 ret = ((struct elf_vax_link_hash_entry *)
450 _bfd_elf_link_hash_newfunc ((struct bfd_hash_entry *) ret,
454 ret->pcrel_relocs_copied = NULL;
457 return (struct bfd_hash_entry *) ret;
460 /* Create an VAX ELF linker hash table. */
462 static struct bfd_link_hash_table *
463 elf_vax_link_hash_table_create (bfd *abfd)
465 struct elf_link_hash_table *ret;
466 bfd_size_type amt = sizeof (struct elf_link_hash_table);
468 ret = bfd_malloc (amt);
472 if (!_bfd_elf_link_hash_table_init (ret, abfd,
473 elf_vax_link_hash_newfunc,
474 sizeof (struct elf_vax_link_hash_entry),
484 /* Keep vax-specific flags in the ELF header */
486 elf32_vax_set_private_flags (bfd *abfd, flagword flags)
488 elf_elfheader (abfd)->e_flags = flags;
489 elf_flags_init (abfd) = TRUE;
493 /* Merge backend specific data from an object file to the output
494 object file when linking. */
496 elf32_vax_merge_private_bfd_data (bfd *ibfd, bfd *obfd)
500 if ( bfd_get_flavour (ibfd) != bfd_target_elf_flavour
501 || bfd_get_flavour (obfd) != bfd_target_elf_flavour)
504 in_flags = elf_elfheader (ibfd)->e_flags;
506 if (!elf_flags_init (obfd))
508 elf_flags_init (obfd) = TRUE;
509 elf_elfheader (obfd)->e_flags = in_flags;
515 /* Display the flags field */
517 elf32_vax_print_private_bfd_data (bfd *abfd, PTR ptr)
519 FILE *file = (FILE *) ptr;
521 BFD_ASSERT (abfd != NULL && ptr != NULL);
523 /* Print normal ELF private data. */
524 _bfd_elf_print_private_bfd_data (abfd, ptr);
526 /* Ignore init flag - it may not be set, despite the flags field containing valid data. */
528 /* xgettext:c-format */
529 fprintf (file, _("private flags = %lx:"), elf_elfheader (abfd)->e_flags);
531 if (elf_elfheader (abfd)->e_flags & EF_VAX_NONPIC)
532 fprintf (file, _(" [nonpic]"));
534 if (elf_elfheader (abfd)->e_flags & EF_VAX_DFLOAT)
535 fprintf (file, _(" [d-float]"));
537 if (elf_elfheader (abfd)->e_flags & EF_VAX_GFLOAT)
538 fprintf (file, _(" [g-float]"));
544 /* Look through the relocs for a section during the first phase, and
545 allocate space in the global offset table or procedure linkage
549 elf_vax_check_relocs (bfd *abfd, struct bfd_link_info *info, asection *sec,
550 const Elf_Internal_Rela *relocs)
553 Elf_Internal_Shdr *symtab_hdr;
554 struct elf_link_hash_entry **sym_hashes;
555 const Elf_Internal_Rela *rel;
556 const Elf_Internal_Rela *rel_end;
561 if (info->relocatable)
564 dynobj = elf_hash_table (info)->dynobj;
565 symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
566 sym_hashes = elf_sym_hashes (abfd);
572 rel_end = relocs + sec->reloc_count;
573 for (rel = relocs; rel < rel_end; rel++)
575 unsigned long r_symndx;
576 struct elf_link_hash_entry *h;
578 r_symndx = ELF32_R_SYM (rel->r_info);
580 if (r_symndx < symtab_hdr->sh_info)
584 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
585 while (h->root.type == bfd_link_hash_indirect
586 || h->root.type == bfd_link_hash_warning)
587 h = (struct elf_link_hash_entry *) h->root.u.i.link;
590 switch (ELF32_R_TYPE (rel->r_info))
593 BFD_ASSERT (h != NULL);
595 || h == elf_hash_table (info)->hgot
596 || h == elf_hash_table (info)->hplt)
599 /* If this is a local symbol, we resolve it directly without
600 creating a global offset table entry. */
601 if (h == NULL || ELF_ST_VISIBILITY (h->other) != STV_DEFAULT)
604 /* This symbol requires a global offset table entry. */
608 /* Create the .got section. */
609 elf_hash_table (info)->dynobj = dynobj = abfd;
610 if (!_bfd_elf_create_got_section (dynobj, info))
616 sgot = bfd_get_section_by_name (dynobj, ".got");
617 BFD_ASSERT (sgot != NULL);
621 && (h != NULL || info->shared))
623 srelgot = bfd_get_section_by_name (dynobj, ".rela.got");
626 srelgot = bfd_make_section_with_flags (dynobj,
635 || !bfd_set_section_alignment (dynobj, srelgot, 2))
642 struct elf_vax_link_hash_entry *eh;
644 eh = (struct elf_vax_link_hash_entry *) h;
645 if (h->got.refcount == -1)
648 eh->got_addend = rel->r_addend;
653 if (eh->got_addend != (bfd_vma) rel->r_addend)
654 (*_bfd_error_handler)
655 (_("%s: warning: GOT addend of %ld to `%s' does"
656 " not match previous GOT addend of %ld"),
657 bfd_get_filename (abfd), rel->r_addend,
666 /* This symbol requires a procedure linkage table entry. We
667 actually build the entry in adjust_dynamic_symbol,
668 because this might be a case of linking PIC code which is
669 never referenced by a dynamic object, in which case we
670 don't need to generate a procedure linkage table entry
673 /* If this is a local symbol, we resolve it directly without
674 creating a procedure linkage table entry. */
675 BFD_ASSERT (h != NULL);
676 if (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT || h->forced_local)
680 if (h->plt.refcount == -1)
689 /* If we are creating a shared library and this is not a local
690 symbol, we need to copy the reloc into the shared library.
691 However when linking with -Bsymbolic and this is a global
692 symbol which is defined in an object we are including in the
693 link (i.e., DEF_REGULAR is set), then we can resolve the
694 reloc directly. At this point we have not seen all the input
695 files, so it is possible that DEF_REGULAR is not set now but
696 will be set later (it is never cleared). We account for that
697 possibility below by storing information in the
698 pcrel_relocs_copied field of the hash table entry. */
700 && (sec->flags & SEC_ALLOC) != 0
703 || !h->def_regular)))
706 && ELF_ST_VISIBILITY (h->other) == STV_DEFAULT
709 /* Make sure a plt entry is created for this symbol if
710 it turns out to be a function defined by a dynamic
712 if (h->plt.refcount == -1)
719 /* If this is a local symbol, we can resolve it directly. */
721 && (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT
729 if (h != NULL && ELF_ST_VISIBILITY (h->other) == STV_DEFAULT)
731 /* Make sure a plt entry is created for this symbol if it
732 turns out to be a function defined by a dynamic object. */
733 if (h->plt.refcount == -1)
739 /* If we are creating a shared library, we need to copy the
740 reloc into the shared library. */
742 && (sec->flags & SEC_ALLOC) != 0)
744 /* When creating a shared object, we must copy these
745 reloc types into the output file. We create a reloc
746 section in dynobj and make room for this reloc. */
749 sreloc = _bfd_elf_make_dynamic_reloc_section
750 (sec, dynobj, 2, abfd, /*rela?*/ TRUE);
755 if (sec->flags & SEC_READONLY)
756 info->flags |= DF_TEXTREL;
759 sreloc->size += sizeof (Elf32_External_Rela);
761 /* If we are linking with -Bsymbolic, we count the number of
762 PC relative relocations we have entered for this symbol,
763 so that we can discard them again if the symbol is later
764 defined by a regular object. Note that this function is
765 only called if we are using a vaxelf linker hash table,
766 which means that h is really a pointer to an
767 elf_vax_link_hash_entry. */
768 if ((ELF32_R_TYPE (rel->r_info) == R_VAX_PC8
769 || ELF32_R_TYPE (rel->r_info) == R_VAX_PC16
770 || ELF32_R_TYPE (rel->r_info) == R_VAX_PC32)
773 struct elf_vax_link_hash_entry *eh;
774 struct elf_vax_pcrel_relocs_copied *p;
776 eh = (struct elf_vax_link_hash_entry *) h;
778 for (p = eh->pcrel_relocs_copied; p != NULL; p = p->next)
779 if (p->section == sreloc)
784 p = ((struct elf_vax_pcrel_relocs_copied *)
785 bfd_alloc (dynobj, (bfd_size_type) sizeof *p));
788 p->next = eh->pcrel_relocs_copied;
789 eh->pcrel_relocs_copied = p;
800 /* This relocation describes the C++ object vtable hierarchy.
801 Reconstruct it for later use during GC. */
802 case R_VAX_GNU_VTINHERIT:
803 if (!bfd_elf_gc_record_vtinherit (abfd, sec, h, rel->r_offset))
807 /* This relocation describes which C++ vtable entries are actually
808 used. Record for later use during GC. */
809 case R_VAX_GNU_VTENTRY:
810 BFD_ASSERT (h != NULL);
812 && !bfd_elf_gc_record_vtentry (abfd, sec, h, rel->r_addend))
824 /* Return the section that should be marked against GC for a given
828 elf_vax_gc_mark_hook (asection *sec,
829 struct bfd_link_info *info,
830 Elf_Internal_Rela *rel,
831 struct elf_link_hash_entry *h,
832 Elf_Internal_Sym *sym)
835 switch (ELF32_R_TYPE (rel->r_info))
837 case R_VAX_GNU_VTINHERIT:
838 case R_VAX_GNU_VTENTRY:
842 return _bfd_elf_gc_mark_hook (sec, info, rel, h, sym);
845 /* Update the got entry reference counts for the section being removed. */
848 elf_vax_gc_sweep_hook (bfd *abfd, struct bfd_link_info *info, asection *sec,
849 const Elf_Internal_Rela *relocs)
851 Elf_Internal_Shdr *symtab_hdr;
852 struct elf_link_hash_entry **sym_hashes;
853 const Elf_Internal_Rela *rel, *relend;
856 if (info->relocatable)
859 dynobj = elf_hash_table (info)->dynobj;
863 symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
864 sym_hashes = elf_sym_hashes (abfd);
866 relend = relocs + sec->reloc_count;
867 for (rel = relocs; rel < relend; rel++)
869 unsigned long r_symndx;
870 struct elf_link_hash_entry *h = NULL;
872 r_symndx = ELF32_R_SYM (rel->r_info);
873 if (r_symndx >= symtab_hdr->sh_info)
875 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
876 while (h->root.type == bfd_link_hash_indirect
877 || h->root.type == bfd_link_hash_warning)
878 h = (struct elf_link_hash_entry *) h->root.u.i.link;
881 switch (ELF32_R_TYPE (rel->r_info))
884 if (h != NULL && h->got.refcount > 0)
895 if (h != NULL && h->plt.refcount > 0)
907 /* Adjust a symbol defined by a dynamic object and referenced by a
908 regular object. The current definition is in some section of the
909 dynamic object, but we're not including those sections. We have to
910 change the definition to something the rest of the link can
914 elf_vax_adjust_dynamic_symbol (info, h)
915 struct bfd_link_info *info;
916 struct elf_link_hash_entry *h;
921 dynobj = elf_hash_table (info)->dynobj;
923 /* Make sure we know what is going on here. */
924 BFD_ASSERT (dynobj != NULL
926 || h->u.weakdef != NULL
929 && !h->def_regular)));
931 /* If this is a function, put it in the procedure linkage table. We
932 will fill in the contents of the procedure linkage table later,
933 when we know the address of the .got section. */
934 if (h->type == STT_FUNC
940 /* We must always create the plt entry if it was referenced
941 by a PLTxxO relocation. In this case we already recorded
942 it as a dynamic symbol. */
945 /* This case can occur if we saw a PLTxx reloc in an input
946 file, but the symbol was never referred to by a dynamic
947 object. In such a case, we don't actually need to build
948 a procedure linkage table, and we can just do a PCxx
950 BFD_ASSERT (h->needs_plt);
951 h->plt.offset = (bfd_vma) -1;
955 /* GC may have rendered this entry unused. */
956 if (h->plt.refcount <= 0)
959 h->plt.offset = (bfd_vma) -1;
963 /* Make sure this symbol is output as a dynamic symbol. */
964 if (h->dynindx == -1)
966 if (! bfd_elf_link_record_dynamic_symbol (info, h))
970 s = bfd_get_section_by_name (dynobj, ".plt");
971 BFD_ASSERT (s != NULL);
973 /* If this is the first .plt entry, make room for the special
977 s->size += PLT_ENTRY_SIZE;
980 /* If this symbol is not defined in a regular file, and we are
981 not generating a shared library, then set the symbol to this
982 location in the .plt. This is required to make function
983 pointers compare as equal between the normal executable and
984 the shared library. */
988 h->root.u.def.section = s;
989 h->root.u.def.value = s->size;
992 h->plt.offset = s->size;
994 /* Make room for this entry. */
995 s->size += PLT_ENTRY_SIZE;
997 /* We also need to make an entry in the .got.plt section, which
998 will be placed in the .got section by the linker script. */
1000 s = bfd_get_section_by_name (dynobj, ".got.plt");
1001 BFD_ASSERT (s != NULL);
1004 /* We also need to make an entry in the .rela.plt section. */
1006 s = bfd_get_section_by_name (dynobj, ".rela.plt");
1007 BFD_ASSERT (s != NULL);
1008 s->size += sizeof (Elf32_External_Rela);
1013 /* Reinitialize the plt offset now that it is not used as a reference
1015 h->plt.offset = (bfd_vma) -1;
1017 /* If this is a weak symbol, and there is a real definition, the
1018 processor independent code will have arranged for us to see the
1019 real definition first, and we can just use the same value. */
1020 if (h->u.weakdef != NULL)
1022 BFD_ASSERT (h->u.weakdef->root.type == bfd_link_hash_defined
1023 || h->u.weakdef->root.type == bfd_link_hash_defweak);
1024 h->root.u.def.section = h->u.weakdef->root.u.def.section;
1025 h->root.u.def.value = h->u.weakdef->root.u.def.value;
1029 /* This is a reference to a symbol defined by a dynamic object which
1030 is not a function. */
1032 /* If we are creating a shared library, we must presume that the
1033 only references to the symbol are via the global offset table.
1034 For such cases we need not do anything here; the relocations will
1035 be handled correctly by relocate_section. */
1039 /* We must allocate the symbol in our .dynbss section, which will
1040 become part of the .bss section of the executable. There will be
1041 an entry for this symbol in the .dynsym section. The dynamic
1042 object will contain position independent code, so all references
1043 from the dynamic object to this symbol will go through the global
1044 offset table. The dynamic linker will use the .dynsym entry to
1045 determine the address it must put in the global offset table, so
1046 both the dynamic object and the regular object will refer to the
1047 same memory location for the variable. */
1049 s = bfd_get_section_by_name (dynobj, ".dynbss");
1050 BFD_ASSERT (s != NULL);
1052 /* We must generate a R_VAX_COPY reloc to tell the dynamic linker to
1053 copy the initial value out of the dynamic object and into the
1054 runtime process image. We need to remember the offset into the
1055 .rela.bss section we are going to use. */
1056 if ((h->root.u.def.section->flags & SEC_ALLOC) != 0 && h->size != 0)
1060 srel = bfd_get_section_by_name (dynobj, ".rela.bss");
1061 BFD_ASSERT (srel != NULL);
1062 srel->size += sizeof (Elf32_External_Rela);
1066 return _bfd_elf_adjust_dynamic_copy (h, s);
1069 /* Set the sizes of the dynamic sections. */
1072 elf_vax_size_dynamic_sections (bfd *output_bfd, struct bfd_link_info *info)
1078 bfd_boolean reltext;
1080 dynobj = elf_hash_table (info)->dynobj;
1081 BFD_ASSERT (dynobj != NULL);
1083 if (elf_hash_table (info)->dynamic_sections_created)
1085 /* Set the contents of the .interp section to the interpreter. */
1086 if (info->executable)
1088 s = bfd_get_section_by_name (dynobj, ".interp");
1089 BFD_ASSERT (s != NULL);
1090 s->size = sizeof ELF_DYNAMIC_INTERPRETER;
1091 s->contents = (unsigned char *) ELF_DYNAMIC_INTERPRETER;
1096 /* We may have created entries in the .rela.got and .got sections.
1097 However, if we are not creating the dynamic sections, we will
1098 not actually use these entries. Reset the size of .rela.got
1099 and .got, which will cause it to get stripped from the output
1101 s = bfd_get_section_by_name (dynobj, ".rela.got");
1104 s = bfd_get_section_by_name (dynobj, ".got.plt");
1107 s = bfd_get_section_by_name (dynobj, ".got");
1112 /* If this is a -Bsymbolic shared link, then we need to discard all PC
1113 relative relocs against symbols defined in a regular object. We
1114 allocated space for them in the check_relocs routine, but we will not
1115 fill them in in the relocate_section routine. */
1116 if (info->shared && info->symbolic)
1117 elf_vax_link_hash_traverse (elf_hash_table (info),
1118 elf_vax_discard_copies,
1121 /* If this is a -Bsymbolic shared link or a static link, we need to
1122 discard all the got entries we've recorded. Otherwise, we need to
1123 instantiate (allocate space for them). */
1124 elf_link_hash_traverse (elf_hash_table (info),
1125 elf_vax_instantiate_got_entries,
1128 /* The check_relocs and adjust_dynamic_symbol entry points have
1129 determined the sizes of the various dynamic sections. Allocate
1134 for (s = dynobj->sections; s != NULL; s = s->next)
1138 if ((s->flags & SEC_LINKER_CREATED) == 0)
1141 /* It's OK to base decisions on the section name, because none
1142 of the dynobj section names depend upon the input files. */
1143 name = bfd_get_section_name (dynobj, s);
1145 if (strcmp (name, ".plt") == 0)
1147 /* Remember whether there is a PLT. */
1150 else if (CONST_STRNEQ (name, ".rela"))
1156 /* Remember whether there are any reloc sections other
1158 if (strcmp (name, ".rela.plt") != 0)
1160 const char *outname;
1164 /* If this relocation section applies to a read only
1165 section, then we probably need a DT_TEXTREL
1166 entry. .rela.plt is actually associated with
1167 .got.plt, which is never readonly. */
1168 outname = bfd_get_section_name (output_bfd,
1170 target = bfd_get_section_by_name (output_bfd, outname + 5);
1172 && (target->flags & SEC_READONLY) != 0
1173 && (target->flags & SEC_ALLOC) != 0)
1177 /* We use the reloc_count field as a counter if we need
1178 to copy relocs into the output file. */
1182 else if (! CONST_STRNEQ (name, ".got")
1183 && strcmp (name, ".dynbss") != 0)
1185 /* It's not one of our sections, so don't allocate space. */
1191 /* If we don't need this section, strip it from the
1192 output file. This is mostly to handle .rela.bss and
1193 .rela.plt. We must create both sections in
1194 create_dynamic_sections, because they must be created
1195 before the linker maps input sections to output
1196 sections. The linker does that before
1197 adjust_dynamic_symbol is called, and it is that
1198 function which decides whether anything needs to go
1199 into these sections. */
1200 s->flags |= SEC_EXCLUDE;
1204 if ((s->flags & SEC_HAS_CONTENTS) == 0)
1207 /* Allocate memory for the section contents. */
1208 s->contents = (bfd_byte *) bfd_alloc (dynobj, s->size);
1209 if (s->contents == NULL)
1213 if (elf_hash_table (info)->dynamic_sections_created)
1215 /* Add some entries to the .dynamic section. We fill in the
1216 values later, in elf_vax_finish_dynamic_sections, but we
1217 must add the entries now so that we get the correct size for
1218 the .dynamic section. The DT_DEBUG entry is filled in by the
1219 dynamic linker and used by the debugger. */
1220 #define add_dynamic_entry(TAG, VAL) \
1221 _bfd_elf_add_dynamic_entry (info, TAG, VAL)
1225 if (!add_dynamic_entry (DT_DEBUG, 0))
1231 if (!add_dynamic_entry (DT_PLTGOT, 0)
1232 || !add_dynamic_entry (DT_PLTRELSZ, 0)
1233 || !add_dynamic_entry (DT_PLTREL, DT_RELA)
1234 || !add_dynamic_entry (DT_JMPREL, 0))
1240 if (!add_dynamic_entry (DT_RELA, 0)
1241 || !add_dynamic_entry (DT_RELASZ, 0)
1242 || !add_dynamic_entry (DT_RELAENT, sizeof (Elf32_External_Rela)))
1246 if (reltext || (info->flags & DF_TEXTREL) != 0)
1248 if (!add_dynamic_entry (DT_TEXTREL, 0))
1252 #undef add_dynamic_entry
1257 /* This function is called via elf_vax_link_hash_traverse if we are
1258 creating a shared object with -Bsymbolic. It discards the space
1259 allocated to copy PC relative relocs against symbols which are defined
1260 in regular objects. We allocated space for them in the check_relocs
1261 routine, but we won't fill them in in the relocate_section routine. */
1264 elf_vax_discard_copies (struct elf_vax_link_hash_entry *h,
1265 PTR ignore ATTRIBUTE_UNUSED)
1267 struct elf_vax_pcrel_relocs_copied *s;
1269 /* We only discard relocs for symbols defined in a regular object. */
1270 if (!h->root.def_regular)
1273 for (s = h->pcrel_relocs_copied; s != NULL; s = s->next)
1274 s->section->size -= s->count * sizeof (Elf32_External_Rela);
1279 /* This function is called via elf_link_hash_traverse. It looks for entries
1280 that have GOT or PLT (.GOT) references. If creating a static object or a
1281 shared object with -Bsymbolic, it resets the reference count back to 0
1282 and sets the offset to -1 so normal PC32 relocation will be done. If
1283 creating a shared object or executable, space in the .got and .rela.got
1284 will be reserved for the symbol. */
1287 elf_vax_instantiate_got_entries (struct elf_link_hash_entry *h, PTR infoptr)
1289 struct bfd_link_info *info = (struct bfd_link_info *) infoptr;
1294 /* We don't care about non-GOT (and non-PLT) entries. */
1295 if (h->got.refcount <= 0 && h->plt.refcount <= 0)
1298 dynobj = elf_hash_table (info)->dynobj;
1302 sgot = bfd_get_section_by_name (dynobj, ".got");
1303 srelgot = bfd_get_section_by_name (dynobj, ".rela.got");
1305 if (!elf_hash_table (info)->dynamic_sections_created
1306 || (info->shared && info->symbolic)
1309 h->got.refcount = 0;
1310 h->got.offset = (bfd_vma) -1;
1311 h->plt.refcount = 0;
1312 h->plt.offset = (bfd_vma) -1;
1314 else if (h->got.refcount > 0)
1318 /* Make sure this symbol is output as a dynamic symbol. */
1319 if (h->dynindx == -1)
1321 if (!bfd_elf_link_record_dynamic_symbol (info, h))
1325 dyn = elf_hash_table (info)->dynamic_sections_created;
1326 /* Allocate space in the .got and .rela.got sections. */
1327 if (ELF_ST_VISIBILITY (h->other) == STV_DEFAULT
1329 || WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, 0, h)))
1332 srelgot->size += sizeof (Elf32_External_Rela);
1339 /* Relocate an VAX ELF section. */
1342 elf_vax_relocate_section (bfd *output_bfd,
1343 struct bfd_link_info *info,
1345 asection *input_section,
1347 Elf_Internal_Rela *relocs,
1348 Elf_Internal_Sym *local_syms,
1349 asection **local_sections)
1352 Elf_Internal_Shdr *symtab_hdr;
1353 struct elf_link_hash_entry **sym_hashes;
1360 Elf_Internal_Rela *rel;
1361 Elf_Internal_Rela *relend;
1363 dynobj = elf_hash_table (info)->dynobj;
1364 symtab_hdr = &elf_tdata (input_bfd)->symtab_hdr;
1365 sym_hashes = elf_sym_hashes (input_bfd);
1373 relend = relocs + input_section->reloc_count;
1374 for (; rel < relend; rel++)
1377 reloc_howto_type *howto;
1378 unsigned long r_symndx;
1379 struct elf_link_hash_entry *h;
1380 Elf_Internal_Sym *sym;
1383 bfd_reloc_status_type r;
1385 r_type = ELF32_R_TYPE (rel->r_info);
1386 if (r_type < 0 || r_type >= (int) R_VAX_max)
1388 bfd_set_error (bfd_error_bad_value);
1391 howto = howto_table + r_type;
1393 r_symndx = ELF32_R_SYM (rel->r_info);
1397 if (r_symndx < symtab_hdr->sh_info)
1399 sym = local_syms + r_symndx;
1400 sec = local_sections[r_symndx];
1401 relocation = _bfd_elf_rela_local_sym (output_bfd, sym, &sec, rel);
1405 bfd_boolean unresolved_reloc;
1408 RELOC_FOR_GLOBAL_SYMBOL (info, input_bfd, input_section, rel,
1409 r_symndx, symtab_hdr, sym_hashes,
1411 unresolved_reloc, warned);
1413 if ((h->root.type == bfd_link_hash_defined
1414 || h->root.type == bfd_link_hash_defweak)
1415 && ((r_type == R_VAX_PLT32
1416 && h->plt.offset != (bfd_vma) -1
1418 && elf_hash_table (info)->dynamic_sections_created)
1419 || (r_type == R_VAX_GOT32
1420 && h->got.offset != (bfd_vma) -1
1422 && elf_hash_table (info)->dynamic_sections_created
1424 || (! info->symbolic && h->dynindx != -1)
1425 || !h->def_regular))
1427 && ((! info->symbolic && h->dynindx != -1)
1429 && ((input_section->flags & SEC_ALLOC) != 0
1430 /* DWARF will emit R_VAX_32 relocations in its
1431 sections against symbols defined externally
1432 in shared libraries. We can't do anything
1435 || ((input_section->flags & SEC_DEBUGGING) != 0
1437 && (r_type == R_VAX_8
1438 || r_type == R_VAX_16
1439 || r_type == R_VAX_32))))
1440 /* In these cases, we don't need the relocation
1441 value. We check specially because in some
1442 obscure cases sec->output_section will be NULL. */
1446 if (sec != NULL && discarded_section (sec))
1447 RELOC_AGAINST_DISCARDED_SECTION (info, input_bfd, input_section,
1448 rel, 1, relend, howto, 0, contents);
1450 if (info->relocatable)
1456 /* Relocation is to the address of the entry for this symbol
1457 in the global offset table. */
1459 || ELF_ST_VISIBILITY (h->other) != STV_DEFAULT
1460 || h->got.offset == (bfd_vma) -1
1464 /* Relocation is the offset of the entry for this symbol in
1465 the global offset table. */
1473 sgot = bfd_get_section_by_name (dynobj, ".got");
1474 BFD_ASSERT (sgot != NULL);
1477 BFD_ASSERT (h != NULL);
1478 off = h->got.offset;
1479 BFD_ASSERT (off != (bfd_vma) -1);
1480 BFD_ASSERT (off < sgot->size);
1482 dyn = elf_hash_table (info)->dynamic_sections_created;
1483 if (! WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, info->shared, h)
1485 && SYMBOL_REFERENCES_LOCAL (info, h)))
1487 /* The symbol was forced to be local
1488 because of a version file.. We must initialize
1489 this entry in the global offset table. Since
1490 the offset must always be a multiple of 4, we
1491 use the least significant bit to record whether
1492 we have initialized it already.
1494 When doing a dynamic link, we create a .rela.got
1495 relocation entry to initialize the value. This
1496 is done in the finish_dynamic_symbol routine. */
1501 bfd_put_32 (output_bfd, relocation + rel->r_addend,
1502 sgot->contents + off);
1506 bfd_put_32 (output_bfd, rel->r_addend, sgot->contents + off);
1509 relocation = sgot->output_offset + off;
1510 /* The GOT relocation uses the addend. */
1513 /* Change the reference to be indirect. */
1514 contents[rel->r_offset - 1] |= 0x10;
1515 relocation += sgot->output_section->vma;
1520 /* If we are creating an executable and the function this
1521 reloc refers to is in a shared lib, then we made a PLT
1522 entry for this symbol and need to handle the reloc like
1525 goto r_vax_pc32_shared;
1528 /* Relocation is to the entry for this symbol in the
1529 procedure linkage table. */
1531 /* Resolve a PLTxx reloc against a local symbol directly,
1532 without using the procedure linkage table. */
1534 || ELF_ST_VISIBILITY (h->other) != STV_DEFAULT
1538 if (h->plt.offset == (bfd_vma) -1
1539 || !elf_hash_table (info)->dynamic_sections_created)
1541 /* We didn't make a PLT entry for this symbol. This
1542 happens when statically linking PIC code, or when
1543 using -Bsymbolic. */
1549 splt = bfd_get_section_by_name (dynobj, ".plt");
1550 BFD_ASSERT (splt != NULL);
1553 if (sgotplt == NULL)
1555 sgotplt = bfd_get_section_by_name (dynobj, ".got.plt");
1556 BFD_ASSERT (sgotplt != NULL);
1559 plt_index = h->plt.offset / PLT_ENTRY_SIZE - 1;
1561 /* Get the offset into the .got table of the entry that
1562 corresponds to this function. Each .got entry is 4 bytes.
1563 The first two are reserved. */
1564 got_offset = (plt_index + 3) * 4;
1566 /* We want the relocation to point into the .got.plt instead
1567 of the plt itself. */
1568 relocation = (sgotplt->output_section->vma
1569 + sgotplt->output_offset
1571 contents[rel->r_offset-1] |= 0x10; /* make indirect */
1572 if (rel->r_addend == 2)
1576 else if (rel->r_addend != 0)
1577 (*_bfd_error_handler)
1578 (_("%s: warning: PLT addend of %d to `%s' from %s section ignored"),
1579 bfd_get_filename (input_bfd), rel->r_addend,
1580 h->root.root.string,
1581 bfd_get_section_name (input_bfd, input_section));
1590 || ELF_ST_VISIBILITY (h->other) != STV_DEFAULT
1598 && r_symndx != STN_UNDEF
1599 && (input_section->flags & SEC_ALLOC) != 0
1600 && ((r_type != R_VAX_PC8
1601 && r_type != R_VAX_PC16
1602 && r_type != R_VAX_PC32)
1603 || ((input_section->flags & SEC_CODE)
1605 || (!h->def_regular && h->type != STT_SECTION)))))
1607 Elf_Internal_Rela outrel;
1609 bfd_boolean skip, relocate;
1611 /* When generating a shared object, these relocations
1612 are copied into the output file to be resolved at run
1616 sreloc = _bfd_elf_get_dynamic_reloc_section
1617 (input_bfd, input_section, /*rela?*/ TRUE);
1626 _bfd_elf_section_offset (output_bfd, info, input_section,
1628 if (outrel.r_offset == (bfd_vma) -1)
1630 if (outrel.r_offset == (bfd_vma) -2)
1631 skip = TRUE, relocate = TRUE;
1632 outrel.r_offset += (input_section->output_section->vma
1633 + input_section->output_offset);
1636 memset (&outrel, 0, sizeof outrel);
1637 /* h->dynindx may be -1 if the symbol was marked to
1640 && ((! info->symbolic && h->dynindx != -1)
1641 || !h->def_regular))
1643 BFD_ASSERT (h->dynindx != -1);
1644 outrel.r_info = ELF32_R_INFO (h->dynindx, r_type);
1645 outrel.r_addend = relocation + rel->r_addend;
1649 if (r_type == R_VAX_32)
1652 outrel.r_info = ELF32_R_INFO (0, R_VAX_RELATIVE);
1653 BFD_ASSERT (bfd_get_signed_32 (input_bfd,
1654 &contents[rel->r_offset]) == 0);
1655 outrel.r_addend = relocation + rel->r_addend;
1661 if (bfd_is_abs_section (sec))
1663 else if (sec == NULL || sec->owner == NULL)
1665 bfd_set_error (bfd_error_bad_value);
1672 /* We are turning this relocation into one
1673 against a section symbol. It would be
1674 proper to subtract the symbol's value,
1675 osec->vma, from the emitted reloc addend,
1676 but ld.so expects buggy relocs. */
1677 osec = sec->output_section;
1678 indx = elf_section_data (osec)->dynindx;
1681 struct elf_link_hash_table *htab;
1682 htab = elf_hash_table (info);
1683 osec = htab->text_index_section;
1684 indx = elf_section_data (osec)->dynindx;
1686 BFD_ASSERT (indx != 0);
1689 outrel.r_info = ELF32_R_INFO (indx, r_type);
1690 outrel.r_addend = relocation + rel->r_addend;
1694 if (!strcmp (bfd_get_section_name (input_bfd, input_section),
1697 && ELF32_R_TYPE(outrel.r_info) != R_VAX_32
1698 && ELF32_R_TYPE(outrel.r_info) != R_VAX_RELATIVE
1699 && ELF32_R_TYPE(outrel.r_info) != R_VAX_COPY
1700 && ELF32_R_TYPE(outrel.r_info) != R_VAX_JMP_SLOT
1701 && ELF32_R_TYPE(outrel.r_info) != R_VAX_GLOB_DAT))
1704 (*_bfd_error_handler)
1705 (_("%s: warning: %s relocation against symbol `%s' from %s section"),
1706 bfd_get_filename (input_bfd), howto->name,
1707 h->root.root.string,
1708 bfd_get_section_name (input_bfd, input_section));
1710 (*_bfd_error_handler)
1711 (_("%s: warning: %s relocation to 0x%x from %s section"),
1712 bfd_get_filename (input_bfd), howto->name,
1714 bfd_get_section_name (input_bfd, input_section));
1716 loc = sreloc->contents;
1717 loc += sreloc->reloc_count++ * sizeof (Elf32_External_Rela);
1718 bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc);
1720 /* This reloc will be computed at runtime, so there's no
1721 need to do anything now, except for R_VAX_32
1722 relocations that have been turned into
1730 case R_VAX_GNU_VTINHERIT:
1731 case R_VAX_GNU_VTENTRY:
1732 /* These are no-ops in the end. */
1739 /* VAX PCREL relocations are from the end of relocation, not the start.
1740 So subtract the difference from the relocation amount since we can't
1741 add it to the offset. */
1742 if (howto->pc_relative && howto->pcrel_offset)
1743 relocation -= bfd_get_reloc_size(howto);
1745 r = _bfd_final_link_relocate (howto, input_bfd, input_section,
1746 contents, rel->r_offset,
1747 relocation, rel->r_addend);
1749 if (r != bfd_reloc_ok)
1754 case bfd_reloc_outofrange:
1756 case bfd_reloc_overflow:
1764 name = bfd_elf_string_from_elf_section (input_bfd,
1765 symtab_hdr->sh_link,
1770 name = bfd_section_name (input_bfd, sec);
1772 if (!(info->callbacks->reloc_overflow
1773 (info, (h ? &h->root : NULL), name, howto->name,
1774 (bfd_vma) 0, input_bfd, input_section,
1786 /* Finish up dynamic symbol handling. We set the contents of various
1787 dynamic sections here. */
1790 elf_vax_finish_dynamic_symbol (bfd *output_bfd, struct bfd_link_info *info,
1791 struct elf_link_hash_entry *h,
1792 Elf_Internal_Sym *sym)
1796 dynobj = elf_hash_table (info)->dynobj;
1798 if (h->plt.offset != (bfd_vma) -1)
1806 Elf_Internal_Rela rela;
1809 /* This symbol has an entry in the procedure linkage table. Set
1811 BFD_ASSERT (h->dynindx != -1);
1813 splt = bfd_get_section_by_name (dynobj, ".plt");
1814 sgot = bfd_get_section_by_name (dynobj, ".got.plt");
1815 srela = bfd_get_section_by_name (dynobj, ".rela.plt");
1816 BFD_ASSERT (splt != NULL && sgot != NULL && srela != NULL);
1818 addend = 2 * (h->plt.offset & 1);
1819 h->plt.offset &= ~1;
1821 /* Get the index in the procedure linkage table which
1822 corresponds to this symbol. This is the index of this symbol
1823 in all the symbols for which we are making plt entries. The
1824 first entry in the procedure linkage table is reserved. */
1825 plt_index = h->plt.offset / PLT_ENTRY_SIZE - 1;
1827 /* Get the offset into the .got table of the entry that
1828 corresponds to this function. Each .got entry is 4 bytes.
1829 The first two are reserved. */
1830 got_offset = (plt_index + 3) * 4;
1832 /* Fill in the entry in the procedure linkage table. */
1833 memcpy (splt->contents + h->plt.offset, elf_vax_plt_entry,
1836 /* The offset is relative to the first extension word. */
1837 bfd_put_32 (output_bfd,
1838 -(h->plt.offset + 8),
1839 splt->contents + h->plt.offset + 4);
1841 bfd_put_32 (output_bfd, plt_index * sizeof (Elf32_External_Rela),
1842 splt->contents + h->plt.offset + 8);
1844 /* Fill in the entry in the global offset table. */
1845 bfd_put_32 (output_bfd,
1846 (splt->output_section->vma
1847 + splt->output_offset
1848 + h->plt.offset) + addend,
1849 sgot->contents + got_offset);
1851 /* Fill in the entry in the .rela.plt section. */
1852 rela.r_offset = (sgot->output_section->vma
1853 + sgot->output_offset
1855 rela.r_info = ELF32_R_INFO (h->dynindx, R_VAX_JMP_SLOT);
1856 rela.r_addend = addend;
1857 loc = srela->contents + plt_index * sizeof (Elf32_External_Rela);
1858 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
1860 if (!h->def_regular)
1862 /* Mark the symbol as undefined, rather than as defined in
1863 the .plt section. Leave the value alone. */
1864 sym->st_shndx = SHN_UNDEF;
1868 if (h->got.offset != (bfd_vma) -1)
1872 Elf_Internal_Rela rela;
1875 /* This symbol has an entry in the global offset table. Set it
1877 sgot = bfd_get_section_by_name (dynobj, ".got");
1878 srela = bfd_get_section_by_name (dynobj, ".rela.got");
1879 BFD_ASSERT (sgot != NULL && srela != NULL);
1881 rela.r_offset = (sgot->output_section->vma
1882 + sgot->output_offset
1883 + (h->got.offset &~ 1));
1885 /* If the symbol was forced to be local because of a version file
1886 locally we just want to emit a RELATIVE reloc. The entry in
1887 the global offset table will already have been initialized in
1888 the relocate_section function. */
1893 rela.r_info = ELF32_R_INFO (0, R_VAX_RELATIVE);
1897 rela.r_info = ELF32_R_INFO (h->dynindx, R_VAX_GLOB_DAT);
1899 rela.r_addend = bfd_get_signed_32 (output_bfd,
1901 + (h->got.offset & ~1)));
1903 loc = srela->contents;
1904 loc += srela->reloc_count++ * sizeof (Elf32_External_Rela);
1905 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
1911 Elf_Internal_Rela rela;
1914 /* This symbol needs a copy reloc. Set it up. */
1915 BFD_ASSERT (h->dynindx != -1
1916 && (h->root.type == bfd_link_hash_defined
1917 || h->root.type == bfd_link_hash_defweak));
1919 s = bfd_get_section_by_name (h->root.u.def.section->owner,
1921 BFD_ASSERT (s != NULL);
1923 rela.r_offset = (h->root.u.def.value
1924 + h->root.u.def.section->output_section->vma
1925 + h->root.u.def.section->output_offset);
1926 rela.r_info = ELF32_R_INFO (h->dynindx, R_VAX_COPY);
1928 loc = s->contents + s->reloc_count++ * sizeof (Elf32_External_Rela);
1929 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
1932 /* Mark _DYNAMIC and _GLOBAL_OFFSET_TABLE_ as absolute. */
1933 if (strcmp (h->root.root.string, "_DYNAMIC") == 0
1934 || h == elf_hash_table (info)->hgot)
1935 sym->st_shndx = SHN_ABS;
1940 /* Finish up the dynamic sections. */
1943 elf_vax_finish_dynamic_sections (bfd *output_bfd, struct bfd_link_info *info)
1949 dynobj = elf_hash_table (info)->dynobj;
1951 sgot = bfd_get_section_by_name (dynobj, ".got.plt");
1952 BFD_ASSERT (sgot != NULL);
1953 sdyn = bfd_get_section_by_name (dynobj, ".dynamic");
1955 if (elf_hash_table (info)->dynamic_sections_created)
1958 Elf32_External_Dyn *dyncon, *dynconend;
1960 splt = bfd_get_section_by_name (dynobj, ".plt");
1961 BFD_ASSERT (splt != NULL && sdyn != NULL);
1963 dyncon = (Elf32_External_Dyn *) sdyn->contents;
1964 dynconend = (Elf32_External_Dyn *) (sdyn->contents + sdyn->size);
1965 for (; dyncon < dynconend; dyncon++)
1967 Elf_Internal_Dyn dyn;
1971 bfd_elf32_swap_dyn_in (dynobj, dyncon, &dyn);
1984 s = bfd_get_section_by_name (output_bfd, name);
1985 BFD_ASSERT (s != NULL);
1986 dyn.d_un.d_ptr = s->vma;
1987 bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon);
1991 s = bfd_get_section_by_name (output_bfd, ".rela.plt");
1992 BFD_ASSERT (s != NULL);
1993 dyn.d_un.d_val = s->size;
1994 bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon);
1998 /* The procedure linkage table relocs (DT_JMPREL) should
1999 not be included in the overall relocs (DT_RELA).
2000 Therefore, we override the DT_RELASZ entry here to
2001 make it not include the JMPREL relocs. Since the
2002 linker script arranges for .rela.plt to follow all
2003 other relocation sections, we don't have to worry
2004 about changing the DT_RELA entry. */
2005 s = bfd_get_section_by_name (output_bfd, ".rela.plt");
2007 dyn.d_un.d_val -= s->size;
2008 bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon);
2013 /* Fill in the first entry in the procedure linkage table. */
2016 memcpy (splt->contents, elf_vax_plt0_entry, PLT_ENTRY_SIZE);
2017 bfd_put_32 (output_bfd,
2018 (sgot->output_section->vma
2019 + sgot->output_offset + 4
2020 - (splt->output_section->vma + 6)),
2021 splt->contents + 2);
2022 bfd_put_32 (output_bfd,
2023 (sgot->output_section->vma
2024 + sgot->output_offset + 8
2025 - (splt->output_section->vma + 12)),
2026 splt->contents + 8);
2027 elf_section_data (splt->output_section)->this_hdr.sh_entsize
2032 /* Fill in the first three entries in the global offset table. */
2036 bfd_put_32 (output_bfd, (bfd_vma) 0, sgot->contents);
2038 bfd_put_32 (output_bfd,
2039 sdyn->output_section->vma + sdyn->output_offset,
2041 bfd_put_32 (output_bfd, (bfd_vma) 0, sgot->contents + 4);
2042 bfd_put_32 (output_bfd, (bfd_vma) 0, sgot->contents + 8);
2045 elf_section_data (sgot->output_section)->this_hdr.sh_entsize = 4;
2050 static enum elf_reloc_type_class
2051 elf_vax_reloc_type_class (const Elf_Internal_Rela *rela)
2053 switch ((int) ELF32_R_TYPE (rela->r_info))
2055 case R_VAX_RELATIVE:
2056 return reloc_class_relative;
2057 case R_VAX_JMP_SLOT:
2058 return reloc_class_plt;
2060 return reloc_class_copy;
2062 return reloc_class_normal;
2067 elf_vax_plt_sym_val (bfd_vma i, const asection *plt,
2068 const arelent *rel ATTRIBUTE_UNUSED)
2070 return plt->vma + (i + 1) * PLT_ENTRY_SIZE;
2073 #define TARGET_LITTLE_SYM bfd_elf32_vax_vec
2074 #define TARGET_LITTLE_NAME "elf32-vax"
2075 #define ELF_MACHINE_CODE EM_VAX
2076 #define ELF_MAXPAGESIZE 0x1000
2078 #define elf_backend_create_dynamic_sections \
2079 _bfd_elf_create_dynamic_sections
2080 #define bfd_elf32_bfd_link_hash_table_create \
2081 elf_vax_link_hash_table_create
2082 #define bfd_elf32_bfd_final_link bfd_elf_gc_common_final_link
2084 #define elf_backend_check_relocs elf_vax_check_relocs
2085 #define elf_backend_adjust_dynamic_symbol \
2086 elf_vax_adjust_dynamic_symbol
2087 #define elf_backend_size_dynamic_sections \
2088 elf_vax_size_dynamic_sections
2089 #define elf_backend_init_index_section _bfd_elf_init_1_index_section
2090 #define elf_backend_relocate_section elf_vax_relocate_section
2091 #define elf_backend_finish_dynamic_symbol \
2092 elf_vax_finish_dynamic_symbol
2093 #define elf_backend_finish_dynamic_sections \
2094 elf_vax_finish_dynamic_sections
2095 #define elf_backend_reloc_type_class elf_vax_reloc_type_class
2096 #define elf_backend_gc_mark_hook elf_vax_gc_mark_hook
2097 #define elf_backend_gc_sweep_hook elf_vax_gc_sweep_hook
2098 #define elf_backend_plt_sym_val elf_vax_plt_sym_val
2099 #define bfd_elf32_bfd_merge_private_bfd_data \
2100 elf32_vax_merge_private_bfd_data
2101 #define bfd_elf32_bfd_set_private_flags \
2102 elf32_vax_set_private_flags
2103 #define bfd_elf32_bfd_print_private_bfd_data \
2104 elf32_vax_print_private_bfd_data
2106 #define elf_backend_can_gc_sections 1
2107 #define elf_backend_want_got_plt 1
2108 #define elf_backend_plt_readonly 1
2109 #define elf_backend_want_plt_sym 0
2110 #define elf_backend_got_header_size 16
2111 #define elf_backend_rela_normal 1
2113 #include "elf32-target.h"