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 *, void *);
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 *, void *)) (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_zmalloc (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, void * 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;
589 /* PR15323, ref flags aren't set for references in the same
591 h->root.non_ir_ref = 1;
594 switch (ELF32_R_TYPE (rel->r_info))
597 BFD_ASSERT (h != NULL);
599 /* If this is a local symbol, we resolve it directly without
600 creating a global offset table entry. */
602 || h == elf_hash_table (info)->hgot
603 || h == elf_hash_table (info)->hplt)
606 /* This symbol requires a global offset table entry. */
610 /* Create the .got section. */
611 elf_hash_table (info)->dynobj = dynobj = abfd;
612 if (!_bfd_elf_create_got_section (dynobj, info))
618 sgot = bfd_get_linker_section (dynobj, ".got");
619 BFD_ASSERT (sgot != NULL);
623 && (h != NULL || info->shared))
625 srelgot = bfd_get_linker_section (dynobj, ".rela.got");
628 flagword flags = (SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS
629 | SEC_IN_MEMORY | SEC_LINKER_CREATED
632 srelgot = bfd_make_section_anyway_with_flags (dynobj,
636 || !bfd_set_section_alignment (dynobj, srelgot, 2))
643 struct elf_vax_link_hash_entry *eh;
645 eh = (struct elf_vax_link_hash_entry *) h;
646 if (h->got.refcount == -1)
649 eh->got_addend = rel->r_addend;
654 if (eh->got_addend != (bfd_vma) rel->r_addend)
655 (*_bfd_error_handler)
656 (_("%s: warning: GOT addend of %ld to `%s' does"
657 " not match previous GOT addend of %ld"),
658 bfd_get_filename (abfd), rel->r_addend,
667 /* This symbol requires a procedure linkage table entry. We
668 actually build the entry in adjust_dynamic_symbol,
669 because this might be a case of linking PIC code which is
670 never referenced by a dynamic object, in which case we
671 don't need to generate a procedure linkage table entry
673 BFD_ASSERT (h != NULL);
675 /* If this is a local symbol, we resolve it directly without
676 creating a procedure linkage table entry. */
681 if (h->plt.refcount == -1)
690 /* If we are creating a shared library and this is not a local
691 symbol, we need to copy the reloc into the shared library.
692 However when linking with -Bsymbolic and this is a global
693 symbol which is defined in an object we are including in the
694 link (i.e., DEF_REGULAR is set), then we can resolve the
695 reloc directly. At this point we have not seen all the input
696 files, so it is possible that DEF_REGULAR is not set now but
697 will be set later (it is never cleared). We account for that
698 possibility below by storing information in the
699 pcrel_relocs_copied field of the hash table entry. */
701 && (sec->flags & SEC_ALLOC) != 0
704 || !h->def_regular)))
707 && ELF_ST_VISIBILITY (h->other) == STV_DEFAULT
710 /* Make sure a plt entry is created for this symbol if
711 it turns out to be a function defined by a dynamic
713 if (h->plt.refcount == -1)
720 /* If this is a local symbol, we can resolve it directly. */
722 && (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT
730 if (h != NULL && ELF_ST_VISIBILITY (h->other) == STV_DEFAULT)
732 /* Make sure a plt entry is created for this symbol if it
733 turns out to be a function defined by a dynamic object. */
734 if (h->plt.refcount == -1)
740 /* If we are creating a shared library, we need to copy the
741 reloc into the shared library. */
743 && (sec->flags & SEC_ALLOC) != 0)
745 /* When creating a shared object, we must copy these
746 reloc types into the output file. We create a reloc
747 section in dynobj and make room for this reloc. */
750 sreloc = _bfd_elf_make_dynamic_reloc_section
751 (sec, dynobj, 2, abfd, /*rela?*/ TRUE);
756 if (sec->flags & SEC_READONLY)
757 info->flags |= DF_TEXTREL;
760 sreloc->size += sizeof (Elf32_External_Rela);
762 /* If we are linking with -Bsymbolic, we count the number of
763 PC relative relocations we have entered for this symbol,
764 so that we can discard them again if the symbol is later
765 defined by a regular object. Note that this function is
766 only called if we are using a vaxelf linker hash table,
767 which means that h is really a pointer to an
768 elf_vax_link_hash_entry. */
769 if ((ELF32_R_TYPE (rel->r_info) == R_VAX_PC8
770 || ELF32_R_TYPE (rel->r_info) == R_VAX_PC16
771 || ELF32_R_TYPE (rel->r_info) == R_VAX_PC32)
774 struct elf_vax_link_hash_entry *eh;
775 struct elf_vax_pcrel_relocs_copied *p;
777 eh = (struct elf_vax_link_hash_entry *) h;
779 for (p = eh->pcrel_relocs_copied; p != NULL; p = p->next)
780 if (p->section == sreloc)
785 p = ((struct elf_vax_pcrel_relocs_copied *)
786 bfd_alloc (dynobj, (bfd_size_type) sizeof *p));
789 p->next = eh->pcrel_relocs_copied;
790 eh->pcrel_relocs_copied = p;
801 /* This relocation describes the C++ object vtable hierarchy.
802 Reconstruct it for later use during GC. */
803 case R_VAX_GNU_VTINHERIT:
804 if (!bfd_elf_gc_record_vtinherit (abfd, sec, h, rel->r_offset))
808 /* This relocation describes which C++ vtable entries are actually
809 used. Record for later use during GC. */
810 case R_VAX_GNU_VTENTRY:
811 BFD_ASSERT (h != NULL);
813 && !bfd_elf_gc_record_vtentry (abfd, sec, h, rel->r_addend))
825 /* Return the section that should be marked against GC for a given
829 elf_vax_gc_mark_hook (asection *sec,
830 struct bfd_link_info *info,
831 Elf_Internal_Rela *rel,
832 struct elf_link_hash_entry *h,
833 Elf_Internal_Sym *sym)
836 switch (ELF32_R_TYPE (rel->r_info))
838 case R_VAX_GNU_VTINHERIT:
839 case R_VAX_GNU_VTENTRY:
843 return _bfd_elf_gc_mark_hook (sec, info, rel, h, sym);
846 /* Update the got entry reference counts for the section being removed. */
849 elf_vax_gc_sweep_hook (bfd *abfd, struct bfd_link_info *info, asection *sec,
850 const Elf_Internal_Rela *relocs)
852 Elf_Internal_Shdr *symtab_hdr;
853 struct elf_link_hash_entry **sym_hashes;
854 const Elf_Internal_Rela *rel, *relend;
857 if (info->relocatable)
860 dynobj = elf_hash_table (info)->dynobj;
864 symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
865 sym_hashes = elf_sym_hashes (abfd);
867 relend = relocs + sec->reloc_count;
868 for (rel = relocs; rel < relend; rel++)
870 unsigned long r_symndx;
871 struct elf_link_hash_entry *h = NULL;
873 r_symndx = ELF32_R_SYM (rel->r_info);
874 if (r_symndx >= symtab_hdr->sh_info)
876 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
877 while (h->root.type == bfd_link_hash_indirect
878 || h->root.type == bfd_link_hash_warning)
879 h = (struct elf_link_hash_entry *) h->root.u.i.link;
882 switch (ELF32_R_TYPE (rel->r_info))
885 if (h != NULL && h->got.refcount > 0)
896 if (h != NULL && h->plt.refcount > 0)
908 /* Adjust a symbol defined by a dynamic object and referenced by a
909 regular object. The current definition is in some section of the
910 dynamic object, but we're not including those sections. We have to
911 change the definition to something the rest of the link can
915 elf_vax_adjust_dynamic_symbol (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
937 if (h->plt.refcount <= 0
938 || SYMBOL_CALLS_LOCAL (info, h)
939 || (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT
940 && h->root.type == bfd_link_hash_undefweak))
942 /* This case can occur if we saw a PLTxx reloc in an input
943 file, but the symbol was never referred to by a dynamic
944 object, or if all references were garbage collected. In
945 such a case, we don't actually need to build a procedure
946 linkage table, and we can just do a PCxx reloc instead. */
947 h->plt.offset = (bfd_vma) -1;
952 s = bfd_get_linker_section (dynobj, ".plt");
953 BFD_ASSERT (s != NULL);
955 /* If this is the first .plt entry, make room for the special
959 s->size += PLT_ENTRY_SIZE;
962 /* If this symbol is not defined in a regular file, and we are
963 not generating a shared library, then set the symbol to this
964 location in the .plt. This is required to make function
965 pointers compare as equal between the normal executable and
966 the shared library. */
970 h->root.u.def.section = s;
971 h->root.u.def.value = s->size;
974 h->plt.offset = s->size;
976 /* Make room for this entry. */
977 s->size += PLT_ENTRY_SIZE;
979 /* We also need to make an entry in the .got.plt section, which
980 will be placed in the .got section by the linker script. */
982 s = bfd_get_linker_section (dynobj, ".got.plt");
983 BFD_ASSERT (s != NULL);
986 /* We also need to make an entry in the .rela.plt section. */
988 s = bfd_get_linker_section (dynobj, ".rela.plt");
989 BFD_ASSERT (s != NULL);
990 s->size += sizeof (Elf32_External_Rela);
995 /* Reinitialize the plt offset now that it is not used as a reference
997 h->plt.offset = (bfd_vma) -1;
999 /* If this is a weak symbol, and there is a real definition, the
1000 processor independent code will have arranged for us to see the
1001 real definition first, and we can just use the same value. */
1002 if (h->u.weakdef != NULL)
1004 BFD_ASSERT (h->u.weakdef->root.type == bfd_link_hash_defined
1005 || h->u.weakdef->root.type == bfd_link_hash_defweak);
1006 h->root.u.def.section = h->u.weakdef->root.u.def.section;
1007 h->root.u.def.value = h->u.weakdef->root.u.def.value;
1011 /* This is a reference to a symbol defined by a dynamic object which
1012 is not a function. */
1014 /* If we are creating a shared library, we must presume that the
1015 only references to the symbol are via the global offset table.
1016 For such cases we need not do anything here; the relocations will
1017 be handled correctly by relocate_section. */
1021 /* We must allocate the symbol in our .dynbss section, which will
1022 become part of the .bss section of the executable. There will be
1023 an entry for this symbol in the .dynsym section. The dynamic
1024 object will contain position independent code, so all references
1025 from the dynamic object to this symbol will go through the global
1026 offset table. The dynamic linker will use the .dynsym entry to
1027 determine the address it must put in the global offset table, so
1028 both the dynamic object and the regular object will refer to the
1029 same memory location for the variable. */
1031 s = bfd_get_linker_section (dynobj, ".dynbss");
1032 BFD_ASSERT (s != NULL);
1034 /* We must generate a R_VAX_COPY reloc to tell the dynamic linker to
1035 copy the initial value out of the dynamic object and into the
1036 runtime process image. We need to remember the offset into the
1037 .rela.bss section we are going to use. */
1038 if ((h->root.u.def.section->flags & SEC_ALLOC) != 0 && h->size != 0)
1042 srel = bfd_get_linker_section (dynobj, ".rela.bss");
1043 BFD_ASSERT (srel != NULL);
1044 srel->size += sizeof (Elf32_External_Rela);
1048 return _bfd_elf_adjust_dynamic_copy (h, s);
1051 /* This function is called via elf_link_hash_traverse. It resets GOT
1052 and PLT (.GOT) reference counts back to -1 so normal PC32 relocation
1056 elf_vax_discard_got_entries (struct elf_link_hash_entry *h,
1057 void *infoptr ATTRIBUTE_UNUSED)
1059 h->got.refcount = -1;
1060 h->plt.refcount = -1;
1065 /* Discard unused dynamic data if this is a static link. */
1068 elf_vax_always_size_sections (bfd *output_bfd ATTRIBUTE_UNUSED,
1069 struct bfd_link_info *info)
1074 dynobj = elf_hash_table (info)->dynobj;
1076 if (dynobj && !elf_hash_table (info)->dynamic_sections_created)
1078 /* We may have created entries in the .rela.got and .got sections.
1079 However, if we are not creating the dynamic sections, we will
1080 not actually use these entries. Reset the size of .rela.got
1081 and .got, which will cause them to get stripped from the output
1083 s = bfd_get_linker_section (dynobj, ".rela.got");
1086 s = bfd_get_linker_section (dynobj, ".got.plt");
1089 s = bfd_get_linker_section (dynobj, ".got");
1094 /* If this is a static link, we need to discard all the got entries we've
1096 if (!dynobj || !elf_hash_table (info)->dynamic_sections_created)
1097 elf_link_hash_traverse (elf_hash_table (info),
1098 elf_vax_discard_got_entries,
1104 /* Set the sizes of the dynamic sections. */
1107 elf_vax_size_dynamic_sections (bfd *output_bfd, struct bfd_link_info *info)
1113 bfd_boolean reltext;
1115 dynobj = elf_hash_table (info)->dynobj;
1116 BFD_ASSERT (dynobj != NULL);
1118 if (elf_hash_table (info)->dynamic_sections_created)
1120 /* Set the contents of the .interp section to the interpreter. */
1121 if (info->executable)
1123 s = bfd_get_linker_section (dynobj, ".interp");
1124 BFD_ASSERT (s != NULL);
1125 s->size = sizeof ELF_DYNAMIC_INTERPRETER;
1126 s->contents = (unsigned char *) ELF_DYNAMIC_INTERPRETER;
1130 /* If this is a -Bsymbolic shared link, then we need to discard all PC
1131 relative relocs against symbols defined in a regular object. We
1132 allocated space for them in the check_relocs routine, but we will not
1133 fill them in in the relocate_section routine. */
1134 if (info->shared && info->symbolic)
1135 elf_vax_link_hash_traverse (elf_hash_table (info),
1136 elf_vax_discard_copies,
1139 /* If this is a -Bsymbolic shared link, we need to discard all the got
1140 entries we've recorded. Otherwise, we need to instantiate (allocate
1142 elf_link_hash_traverse (elf_hash_table (info),
1143 elf_vax_instantiate_got_entries,
1146 /* The check_relocs and adjust_dynamic_symbol entry points have
1147 determined the sizes of the various dynamic sections. Allocate
1152 for (s = dynobj->sections; s != NULL; s = s->next)
1156 if ((s->flags & SEC_LINKER_CREATED) == 0)
1159 /* It's OK to base decisions on the section name, because none
1160 of the dynobj section names depend upon the input files. */
1161 name = bfd_get_section_name (dynobj, s);
1163 if (strcmp (name, ".plt") == 0)
1165 /* Remember whether there is a PLT. */
1168 else if (CONST_STRNEQ (name, ".rela"))
1174 /* Remember whether there are any reloc sections other
1176 if (strcmp (name, ".rela.plt") != 0)
1178 const char *outname;
1182 /* If this relocation section applies to a read only
1183 section, then we probably need a DT_TEXTREL
1184 entry. .rela.plt is actually associated with
1185 .got.plt, which is never readonly. */
1186 outname = bfd_get_section_name (output_bfd,
1188 target = bfd_get_section_by_name (output_bfd, outname + 5);
1190 && (target->flags & SEC_READONLY) != 0
1191 && (target->flags & SEC_ALLOC) != 0)
1195 /* We use the reloc_count field as a counter if we need
1196 to copy relocs into the output file. */
1200 else if (! CONST_STRNEQ (name, ".got")
1201 && strcmp (name, ".dynbss") != 0)
1203 /* It's not one of our sections, so don't allocate space. */
1209 /* If we don't need this section, strip it from the
1210 output file. This is mostly to handle .rela.bss and
1211 .rela.plt. We must create both sections in
1212 create_dynamic_sections, because they must be created
1213 before the linker maps input sections to output
1214 sections. The linker does that before
1215 adjust_dynamic_symbol is called, and it is that
1216 function which decides whether anything needs to go
1217 into these sections. */
1218 s->flags |= SEC_EXCLUDE;
1222 if ((s->flags & SEC_HAS_CONTENTS) == 0)
1225 /* Allocate memory for the section contents. */
1226 s->contents = (bfd_byte *) bfd_alloc (dynobj, s->size);
1227 if (s->contents == NULL)
1231 if (elf_hash_table (info)->dynamic_sections_created)
1233 /* Add some entries to the .dynamic section. We fill in the
1234 values later, in elf_vax_finish_dynamic_sections, but we
1235 must add the entries now so that we get the correct size for
1236 the .dynamic section. The DT_DEBUG entry is filled in by the
1237 dynamic linker and used by the debugger. */
1238 #define add_dynamic_entry(TAG, VAL) \
1239 _bfd_elf_add_dynamic_entry (info, TAG, VAL)
1243 if (!add_dynamic_entry (DT_DEBUG, 0))
1249 if (!add_dynamic_entry (DT_PLTGOT, 0)
1250 || !add_dynamic_entry (DT_PLTRELSZ, 0)
1251 || !add_dynamic_entry (DT_PLTREL, DT_RELA)
1252 || !add_dynamic_entry (DT_JMPREL, 0))
1258 if (!add_dynamic_entry (DT_RELA, 0)
1259 || !add_dynamic_entry (DT_RELASZ, 0)
1260 || !add_dynamic_entry (DT_RELAENT, sizeof (Elf32_External_Rela)))
1264 if (reltext || (info->flags & DF_TEXTREL) != 0)
1266 if (!add_dynamic_entry (DT_TEXTREL, 0))
1270 #undef add_dynamic_entry
1275 /* This function is called via elf_vax_link_hash_traverse if we are
1276 creating a shared object with -Bsymbolic. It discards the space
1277 allocated to copy PC relative relocs against symbols which are defined
1278 in regular objects. We allocated space for them in the check_relocs
1279 routine, but we won't fill them in in the relocate_section routine. */
1282 elf_vax_discard_copies (struct elf_vax_link_hash_entry *h,
1283 void * ignore ATTRIBUTE_UNUSED)
1285 struct elf_vax_pcrel_relocs_copied *s;
1287 /* We only discard relocs for symbols defined in a regular object. */
1288 if (!h->root.def_regular)
1291 for (s = h->pcrel_relocs_copied; s != NULL; s = s->next)
1292 s->section->size -= s->count * sizeof (Elf32_External_Rela);
1297 /* This function is called via elf_link_hash_traverse. It looks for
1298 entries that have GOT or PLT (.GOT) references. If creating a shared
1299 object with -Bsymbolic, or the symbol has been forced local, then it
1300 resets the reference count back to -1 so normal PC32 relocation will
1301 be done. Otherwise space in the .got and .rela.got will be reserved
1305 elf_vax_instantiate_got_entries (struct elf_link_hash_entry *h, void * infoptr)
1307 struct bfd_link_info *info = (struct bfd_link_info *) infoptr;
1312 /* We don't care about non-GOT (and non-PLT) entries. */
1313 if (h->got.refcount <= 0 && h->plt.refcount <= 0)
1316 dynobj = elf_hash_table (info)->dynobj;
1317 BFD_ASSERT (dynobj != NULL);
1319 sgot = bfd_get_linker_section (dynobj, ".got");
1320 srelgot = bfd_get_linker_section (dynobj, ".rela.got");
1322 if (SYMBOL_REFERENCES_LOCAL (info, h))
1324 h->got.refcount = -1;
1325 h->plt.refcount = -1;
1327 else if (h->got.refcount > 0)
1329 /* Make sure this symbol is output as a dynamic symbol. */
1330 if (h->dynindx == -1)
1332 if (!bfd_elf_link_record_dynamic_symbol (info, h))
1336 /* Allocate space in the .got and .rela.got sections. */
1338 srelgot->size += sizeof (Elf32_External_Rela);
1344 /* Relocate an VAX ELF section. */
1347 elf_vax_relocate_section (bfd *output_bfd,
1348 struct bfd_link_info *info,
1350 asection *input_section,
1352 Elf_Internal_Rela *relocs,
1353 Elf_Internal_Sym *local_syms,
1354 asection **local_sections)
1357 Elf_Internal_Shdr *symtab_hdr;
1358 struct elf_link_hash_entry **sym_hashes;
1365 Elf_Internal_Rela *rel;
1366 Elf_Internal_Rela *relend;
1368 dynobj = elf_hash_table (info)->dynobj;
1369 symtab_hdr = &elf_tdata (input_bfd)->symtab_hdr;
1370 sym_hashes = elf_sym_hashes (input_bfd);
1378 relend = relocs + input_section->reloc_count;
1379 for (; rel < relend; rel++)
1382 reloc_howto_type *howto;
1383 unsigned long r_symndx;
1384 struct elf_link_hash_entry *h;
1385 Elf_Internal_Sym *sym;
1388 bfd_reloc_status_type r;
1390 r_type = ELF32_R_TYPE (rel->r_info);
1391 if (r_type < 0 || r_type >= (int) R_VAX_max)
1393 bfd_set_error (bfd_error_bad_value);
1396 howto = howto_table + r_type;
1398 r_symndx = ELF32_R_SYM (rel->r_info);
1402 if (r_symndx < symtab_hdr->sh_info)
1404 sym = local_syms + r_symndx;
1405 sec = local_sections[r_symndx];
1406 relocation = _bfd_elf_rela_local_sym (output_bfd, sym, &sec, rel);
1410 bfd_boolean unresolved_reloc;
1411 bfd_boolean warned, ignored;
1413 RELOC_FOR_GLOBAL_SYMBOL (info, input_bfd, input_section, rel,
1414 r_symndx, symtab_hdr, sym_hashes,
1416 unresolved_reloc, warned, ignored);
1418 if ((h->root.type == bfd_link_hash_defined
1419 || h->root.type == bfd_link_hash_defweak)
1420 && ((r_type == R_VAX_PLT32
1421 && h->plt.offset != (bfd_vma) -1
1423 && elf_hash_table (info)->dynamic_sections_created)
1424 || (r_type == R_VAX_GOT32
1425 && h->got.offset != (bfd_vma) -1
1427 && elf_hash_table (info)->dynamic_sections_created
1429 || (! info->symbolic && h->dynindx != -1)
1430 || !h->def_regular))
1432 && ((! info->symbolic && h->dynindx != -1)
1434 && ((input_section->flags & SEC_ALLOC) != 0
1435 /* DWARF will emit R_VAX_32 relocations in its
1436 sections against symbols defined externally
1437 in shared libraries. We can't do anything
1440 || ((input_section->flags & SEC_DEBUGGING) != 0
1442 && (r_type == R_VAX_8
1443 || r_type == R_VAX_16
1444 || r_type == R_VAX_32))))
1445 /* In these cases, we don't need the relocation
1446 value. We check specially because in some
1447 obscure cases sec->output_section will be NULL. */
1451 if (sec != NULL && discarded_section (sec))
1452 RELOC_AGAINST_DISCARDED_SECTION (info, input_bfd, input_section,
1453 rel, 1, relend, howto, 0, contents);
1455 if (info->relocatable)
1461 /* Relocation is to the address of the entry for this symbol
1462 in the global offset table. */
1464 /* Resolve a GOTxx reloc against a local symbol directly,
1465 without using the global offset table. */
1467 || h->got.offset == (bfd_vma) -1)
1475 sgot = bfd_get_linker_section (dynobj, ".got");
1476 BFD_ASSERT (sgot != NULL);
1479 off = h->got.offset;
1480 BFD_ASSERT (off < sgot->size);
1482 bfd_put_32 (output_bfd, rel->r_addend, sgot->contents + off);
1484 relocation = sgot->output_offset + off;
1485 /* The GOT relocation uses the addend. */
1488 /* Change the reference to be indirect. */
1489 contents[rel->r_offset - 1] |= 0x10;
1490 relocation += sgot->output_section->vma;
1495 /* If we are creating an executable and the function this
1496 reloc refers to is in a shared lib, then we made a PLT
1497 entry for this symbol and need to handle the reloc like
1500 goto r_vax_pc32_shared;
1503 /* Relocation is to the entry for this symbol in the
1504 procedure linkage table. */
1506 /* Resolve a PLTxx reloc against a local symbol directly,
1507 without using the procedure linkage table. */
1509 || h->plt.offset == (bfd_vma) -1)
1514 splt = bfd_get_linker_section (dynobj, ".plt");
1515 BFD_ASSERT (splt != NULL);
1518 if (sgotplt == NULL)
1520 sgotplt = bfd_get_linker_section (dynobj, ".got.plt");
1521 BFD_ASSERT (sgotplt != NULL);
1524 plt_index = h->plt.offset / PLT_ENTRY_SIZE - 1;
1526 /* Get the offset into the .got table of the entry that
1527 corresponds to this function. Each .got entry is 4 bytes.
1528 The first two are reserved. */
1529 got_offset = (plt_index + 3) * 4;
1531 /* We want the relocation to point into the .got.plt instead
1532 of the plt itself. */
1533 relocation = (sgotplt->output_section->vma
1534 + sgotplt->output_offset
1536 contents[rel->r_offset-1] |= 0x10; /* make indirect */
1537 if (rel->r_addend == 2)
1541 else if (rel->r_addend != 0)
1542 (*_bfd_error_handler)
1543 (_("%s: warning: PLT addend of %d to `%s' from %s section ignored"),
1544 bfd_get_filename (input_bfd), rel->r_addend,
1545 h->root.root.string,
1546 bfd_get_section_name (input_bfd, input_section));
1555 || ELF_ST_VISIBILITY (h->other) != STV_DEFAULT
1563 && r_symndx != STN_UNDEF
1564 && (input_section->flags & SEC_ALLOC) != 0
1565 && ((r_type != R_VAX_PC8
1566 && r_type != R_VAX_PC16
1567 && r_type != R_VAX_PC32)
1568 || ((input_section->flags & SEC_CODE)
1570 || (!h->def_regular && h->type != STT_SECTION)))))
1572 Elf_Internal_Rela outrel;
1574 bfd_boolean skip, relocate;
1576 /* When generating a shared object, these relocations
1577 are copied into the output file to be resolved at run
1581 sreloc = _bfd_elf_get_dynamic_reloc_section
1582 (input_bfd, input_section, /*rela?*/ TRUE);
1591 _bfd_elf_section_offset (output_bfd, info, input_section,
1593 if (outrel.r_offset == (bfd_vma) -1)
1595 if (outrel.r_offset == (bfd_vma) -2)
1596 skip = TRUE, relocate = TRUE;
1597 outrel.r_offset += (input_section->output_section->vma
1598 + input_section->output_offset);
1601 memset (&outrel, 0, sizeof outrel);
1602 /* h->dynindx may be -1 if the symbol was marked to
1605 && ((! info->symbolic && h->dynindx != -1)
1606 || !h->def_regular))
1608 BFD_ASSERT (h->dynindx != -1);
1609 outrel.r_info = ELF32_R_INFO (h->dynindx, r_type);
1610 outrel.r_addend = relocation + rel->r_addend;
1614 if (r_type == R_VAX_32)
1617 outrel.r_info = ELF32_R_INFO (0, R_VAX_RELATIVE);
1618 BFD_ASSERT (bfd_get_signed_32 (input_bfd,
1619 &contents[rel->r_offset]) == 0);
1620 outrel.r_addend = relocation + rel->r_addend;
1626 if (bfd_is_abs_section (sec))
1628 else if (sec == NULL || sec->owner == NULL)
1630 bfd_set_error (bfd_error_bad_value);
1637 /* We are turning this relocation into one
1638 against a section symbol. It would be
1639 proper to subtract the symbol's value,
1640 osec->vma, from the emitted reloc addend,
1641 but ld.so expects buggy relocs. */
1642 osec = sec->output_section;
1643 indx = elf_section_data (osec)->dynindx;
1646 struct elf_link_hash_table *htab;
1647 htab = elf_hash_table (info);
1648 osec = htab->text_index_section;
1649 indx = elf_section_data (osec)->dynindx;
1651 BFD_ASSERT (indx != 0);
1654 outrel.r_info = ELF32_R_INFO (indx, r_type);
1655 outrel.r_addend = relocation + rel->r_addend;
1659 if ((input_section->flags & SEC_CODE) != 0
1660 || (ELF32_R_TYPE (outrel.r_info) != R_VAX_32
1661 && ELF32_R_TYPE (outrel.r_info) != R_VAX_RELATIVE
1662 && ELF32_R_TYPE (outrel.r_info) != R_VAX_COPY
1663 && ELF32_R_TYPE (outrel.r_info) != R_VAX_JMP_SLOT
1664 && ELF32_R_TYPE (outrel.r_info) != R_VAX_GLOB_DAT))
1667 (*_bfd_error_handler)
1668 (_("%s: warning: %s relocation against symbol `%s' from %s section"),
1669 bfd_get_filename (input_bfd), howto->name,
1670 h->root.root.string,
1671 bfd_get_section_name (input_bfd, input_section));
1673 (*_bfd_error_handler)
1674 (_("%s: warning: %s relocation to 0x%x from %s section"),
1675 bfd_get_filename (input_bfd), howto->name,
1677 bfd_get_section_name (input_bfd, input_section));
1679 loc = sreloc->contents;
1680 loc += sreloc->reloc_count++ * sizeof (Elf32_External_Rela);
1681 bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc);
1683 /* This reloc will be computed at runtime, so there's no
1684 need to do anything now, except for R_VAX_32
1685 relocations that have been turned into
1693 case R_VAX_GNU_VTINHERIT:
1694 case R_VAX_GNU_VTENTRY:
1695 /* These are no-ops in the end. */
1702 /* VAX PCREL relocations are from the end of relocation, not the start.
1703 So subtract the difference from the relocation amount since we can't
1704 add it to the offset. */
1705 if (howto->pc_relative && howto->pcrel_offset)
1706 relocation -= bfd_get_reloc_size(howto);
1708 r = _bfd_final_link_relocate (howto, input_bfd, input_section,
1709 contents, rel->r_offset,
1710 relocation, rel->r_addend);
1712 if (r != bfd_reloc_ok)
1717 case bfd_reloc_outofrange:
1719 case bfd_reloc_overflow:
1727 name = bfd_elf_string_from_elf_section (input_bfd,
1728 symtab_hdr->sh_link,
1733 name = bfd_section_name (input_bfd, sec);
1735 if (!(info->callbacks->reloc_overflow
1736 (info, (h ? &h->root : NULL), name, howto->name,
1737 (bfd_vma) 0, input_bfd, input_section,
1749 /* Finish up dynamic symbol handling. We set the contents of various
1750 dynamic sections here. */
1753 elf_vax_finish_dynamic_symbol (bfd *output_bfd, struct bfd_link_info *info,
1754 struct elf_link_hash_entry *h,
1755 Elf_Internal_Sym *sym)
1759 dynobj = elf_hash_table (info)->dynobj;
1761 if (h->plt.offset != (bfd_vma) -1)
1769 Elf_Internal_Rela rela;
1772 /* This symbol has an entry in the procedure linkage table. Set
1774 BFD_ASSERT (h->dynindx != -1);
1776 splt = bfd_get_linker_section (dynobj, ".plt");
1777 sgot = bfd_get_linker_section (dynobj, ".got.plt");
1778 srela = bfd_get_linker_section (dynobj, ".rela.plt");
1779 BFD_ASSERT (splt != NULL && sgot != NULL && srela != NULL);
1781 addend = 2 * (h->plt.offset & 1);
1782 h->plt.offset &= ~1;
1784 /* Get the index in the procedure linkage table which
1785 corresponds to this symbol. This is the index of this symbol
1786 in all the symbols for which we are making plt entries. The
1787 first entry in the procedure linkage table is reserved. */
1788 plt_index = h->plt.offset / PLT_ENTRY_SIZE - 1;
1790 /* Get the offset into the .got table of the entry that
1791 corresponds to this function. Each .got entry is 4 bytes.
1792 The first two are reserved. */
1793 got_offset = (plt_index + 3) * 4;
1795 /* Fill in the entry in the procedure linkage table. */
1796 memcpy (splt->contents + h->plt.offset, elf_vax_plt_entry,
1799 /* The offset is relative to the first extension word. */
1800 bfd_put_32 (output_bfd,
1801 -(h->plt.offset + 8),
1802 splt->contents + h->plt.offset + 4);
1804 bfd_put_32 (output_bfd, plt_index * sizeof (Elf32_External_Rela),
1805 splt->contents + h->plt.offset + 8);
1807 /* Fill in the entry in the global offset table. */
1808 bfd_put_32 (output_bfd,
1809 (splt->output_section->vma
1810 + splt->output_offset
1811 + h->plt.offset) + addend,
1812 sgot->contents + got_offset);
1814 /* Fill in the entry in the .rela.plt section. */
1815 rela.r_offset = (sgot->output_section->vma
1816 + sgot->output_offset
1818 rela.r_info = ELF32_R_INFO (h->dynindx, R_VAX_JMP_SLOT);
1819 rela.r_addend = addend;
1820 loc = srela->contents + plt_index * sizeof (Elf32_External_Rela);
1821 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
1823 if (!h->def_regular)
1825 /* Mark the symbol as undefined, rather than as defined in
1826 the .plt section. Leave the value alone. */
1827 sym->st_shndx = SHN_UNDEF;
1831 if (h->got.offset != (bfd_vma) -1)
1835 Elf_Internal_Rela rela;
1838 /* This symbol has an entry in the global offset table. Set it
1840 sgot = bfd_get_linker_section (dynobj, ".got");
1841 srela = bfd_get_linker_section (dynobj, ".rela.got");
1842 BFD_ASSERT (sgot != NULL && srela != NULL);
1844 rela.r_offset = (sgot->output_section->vma
1845 + sgot->output_offset
1847 rela.r_info = ELF32_R_INFO (h->dynindx, R_VAX_GLOB_DAT);
1848 rela.r_addend = bfd_get_signed_32 (output_bfd,
1849 sgot->contents + h->got.offset);
1851 loc = srela->contents;
1852 loc += srela->reloc_count++ * sizeof (Elf32_External_Rela);
1853 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
1859 Elf_Internal_Rela rela;
1862 /* This symbol needs a copy reloc. Set it up. */
1863 BFD_ASSERT (h->dynindx != -1
1864 && (h->root.type == bfd_link_hash_defined
1865 || h->root.type == bfd_link_hash_defweak));
1867 s = bfd_get_linker_section (dynobj, ".rela.bss");
1868 BFD_ASSERT (s != NULL);
1870 rela.r_offset = (h->root.u.def.value
1871 + h->root.u.def.section->output_section->vma
1872 + h->root.u.def.section->output_offset);
1873 rela.r_info = ELF32_R_INFO (h->dynindx, R_VAX_COPY);
1875 loc = s->contents + s->reloc_count++ * sizeof (Elf32_External_Rela);
1876 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
1879 /* Mark _DYNAMIC and _GLOBAL_OFFSET_TABLE_ as absolute. */
1880 if (h == elf_hash_table (info)->hdynamic
1881 || h == elf_hash_table (info)->hgot)
1882 sym->st_shndx = SHN_ABS;
1887 /* Finish up the dynamic sections. */
1890 elf_vax_finish_dynamic_sections (bfd *output_bfd, struct bfd_link_info *info)
1896 dynobj = elf_hash_table (info)->dynobj;
1898 sgot = bfd_get_linker_section (dynobj, ".got.plt");
1899 BFD_ASSERT (sgot != NULL);
1900 sdyn = bfd_get_linker_section (dynobj, ".dynamic");
1902 if (elf_hash_table (info)->dynamic_sections_created)
1905 Elf32_External_Dyn *dyncon, *dynconend;
1907 splt = bfd_get_linker_section (dynobj, ".plt");
1908 BFD_ASSERT (splt != NULL && sdyn != NULL);
1910 dyncon = (Elf32_External_Dyn *) sdyn->contents;
1911 dynconend = (Elf32_External_Dyn *) (sdyn->contents + sdyn->size);
1912 for (; dyncon < dynconend; dyncon++)
1914 Elf_Internal_Dyn dyn;
1918 bfd_elf32_swap_dyn_in (dynobj, dyncon, &dyn);
1931 s = bfd_get_section_by_name (output_bfd, name);
1932 BFD_ASSERT (s != NULL);
1933 dyn.d_un.d_ptr = s->vma;
1934 bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon);
1938 s = bfd_get_section_by_name (output_bfd, ".rela.plt");
1939 BFD_ASSERT (s != NULL);
1940 dyn.d_un.d_val = s->size;
1941 bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon);
1945 /* The procedure linkage table relocs (DT_JMPREL) should
1946 not be included in the overall relocs (DT_RELA).
1947 Therefore, we override the DT_RELASZ entry here to
1948 make it not include the JMPREL relocs. Since the
1949 linker script arranges for .rela.plt to follow all
1950 other relocation sections, we don't have to worry
1951 about changing the DT_RELA entry. */
1952 s = bfd_get_section_by_name (output_bfd, ".rela.plt");
1954 dyn.d_un.d_val -= s->size;
1955 bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon);
1960 /* Fill in the first entry in the procedure linkage table. */
1963 memcpy (splt->contents, elf_vax_plt0_entry, PLT_ENTRY_SIZE);
1964 bfd_put_32 (output_bfd,
1965 (sgot->output_section->vma
1966 + sgot->output_offset + 4
1967 - (splt->output_section->vma + 6)),
1968 splt->contents + 2);
1969 bfd_put_32 (output_bfd,
1970 (sgot->output_section->vma
1971 + sgot->output_offset + 8
1972 - (splt->output_section->vma + 12)),
1973 splt->contents + 8);
1974 elf_section_data (splt->output_section)->this_hdr.sh_entsize
1979 /* Fill in the first three entries in the global offset table. */
1983 bfd_put_32 (output_bfd, (bfd_vma) 0, sgot->contents);
1985 bfd_put_32 (output_bfd,
1986 sdyn->output_section->vma + sdyn->output_offset,
1988 bfd_put_32 (output_bfd, (bfd_vma) 0, sgot->contents + 4);
1989 bfd_put_32 (output_bfd, (bfd_vma) 0, sgot->contents + 8);
1992 if (elf_section_data (sgot->output_section) != NULL)
1993 elf_section_data (sgot->output_section)->this_hdr.sh_entsize = 4;
1998 static enum elf_reloc_type_class
1999 elf_vax_reloc_type_class (const struct bfd_link_info *info ATTRIBUTE_UNUSED,
2000 const asection *rel_sec ATTRIBUTE_UNUSED,
2001 const Elf_Internal_Rela *rela)
2003 switch ((int) ELF32_R_TYPE (rela->r_info))
2005 case R_VAX_RELATIVE:
2006 return reloc_class_relative;
2007 case R_VAX_JMP_SLOT:
2008 return reloc_class_plt;
2010 return reloc_class_copy;
2012 return reloc_class_normal;
2017 elf_vax_plt_sym_val (bfd_vma i, const asection *plt,
2018 const arelent *rel ATTRIBUTE_UNUSED)
2020 return plt->vma + (i + 1) * PLT_ENTRY_SIZE;
2023 #define TARGET_LITTLE_SYM bfd_elf32_vax_vec
2024 #define TARGET_LITTLE_NAME "elf32-vax"
2025 #define ELF_MACHINE_CODE EM_VAX
2026 #define ELF_MAXPAGESIZE 0x1000
2028 #define elf_backend_create_dynamic_sections \
2029 _bfd_elf_create_dynamic_sections
2030 #define bfd_elf32_bfd_link_hash_table_create \
2031 elf_vax_link_hash_table_create
2032 #define bfd_elf32_bfd_final_link bfd_elf_gc_common_final_link
2034 #define elf_backend_check_relocs elf_vax_check_relocs
2035 #define elf_backend_adjust_dynamic_symbol \
2036 elf_vax_adjust_dynamic_symbol
2037 #define elf_backend_always_size_sections \
2038 elf_vax_always_size_sections
2039 #define elf_backend_size_dynamic_sections \
2040 elf_vax_size_dynamic_sections
2041 #define elf_backend_init_index_section _bfd_elf_init_1_index_section
2042 #define elf_backend_relocate_section elf_vax_relocate_section
2043 #define elf_backend_finish_dynamic_symbol \
2044 elf_vax_finish_dynamic_symbol
2045 #define elf_backend_finish_dynamic_sections \
2046 elf_vax_finish_dynamic_sections
2047 #define elf_backend_reloc_type_class elf_vax_reloc_type_class
2048 #define elf_backend_gc_mark_hook elf_vax_gc_mark_hook
2049 #define elf_backend_gc_sweep_hook elf_vax_gc_sweep_hook
2050 #define elf_backend_plt_sym_val elf_vax_plt_sym_val
2051 #define bfd_elf32_bfd_merge_private_bfd_data \
2052 elf32_vax_merge_private_bfd_data
2053 #define bfd_elf32_bfd_set_private_flags \
2054 elf32_vax_set_private_flags
2055 #define bfd_elf32_bfd_print_private_bfd_data \
2056 elf32_vax_print_private_bfd_data
2058 #define elf_backend_can_gc_sections 1
2059 #define elf_backend_want_got_plt 1
2060 #define elf_backend_plt_readonly 1
2061 #define elf_backend_want_plt_sym 0
2062 #define elf_backend_got_header_size 16
2063 #define elf_backend_rela_normal 1
2065 #include "elf32-target.h"