1 /* VAX series support for 32-bit ELF
2 Copyright 1993, 1995, 1996, 1997, 1998, 1999, 2000, 2001, 2002, 2003,
3 2004 Free Software Foundation, Inc.
4 Contributed by Matt Thomas <matt@3am-software.com>.
6 This file is part of BFD, the Binary File Descriptor library.
8 This program is free software; you can redistribute it and/or modify
9 it under the terms of the GNU General Public License as published by
10 the Free Software Foundation; either version 2 of the License, or
11 (at your option) any later version.
13 This program is distributed in the hope that it will be useful,
14 but WITHOUT ANY WARRANTY; without even the implied warranty of
15 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 GNU General Public License for more details.
18 You should have received a copy of the GNU General Public License
19 along with this program; if not, write to the Free Software
20 Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */
29 static reloc_howto_type *reloc_type_lookup
30 PARAMS ((bfd *, bfd_reloc_code_real_type));
31 static void rtype_to_howto
32 PARAMS ((bfd *, arelent *, Elf_Internal_Rela *));
33 static struct bfd_hash_entry *elf_vax_link_hash_newfunc
34 PARAMS ((struct bfd_hash_entry *, struct bfd_hash_table *, const char *));
35 static struct bfd_link_hash_table *elf_vax_link_hash_table_create
37 static bfd_boolean elf_vax_check_relocs
38 PARAMS ((bfd *, struct bfd_link_info *, asection *,
39 const Elf_Internal_Rela *));
40 static asection *elf_vax_gc_mark_hook
41 PARAMS ((asection *, struct bfd_link_info *, Elf_Internal_Rela *,
42 struct elf_link_hash_entry *, Elf_Internal_Sym *));
43 static bfd_boolean elf_vax_gc_sweep_hook
44 PARAMS ((bfd *, struct bfd_link_info *, asection *,
45 const Elf_Internal_Rela *));
46 static bfd_boolean elf_vax_adjust_dynamic_symbol
47 PARAMS ((struct bfd_link_info *, struct elf_link_hash_entry *));
48 static bfd_boolean elf_vax_size_dynamic_sections
49 PARAMS ((bfd *, struct bfd_link_info *));
50 static bfd_boolean elf_vax_relocate_section
51 PARAMS ((bfd *, struct bfd_link_info *, bfd *, asection *, bfd_byte *,
52 Elf_Internal_Rela *, Elf_Internal_Sym *, asection **));
53 static bfd_boolean elf_vax_finish_dynamic_symbol
54 PARAMS ((bfd *, struct bfd_link_info *, struct elf_link_hash_entry *,
56 static bfd_boolean elf_vax_finish_dynamic_sections
57 PARAMS ((bfd *, struct bfd_link_info *));
59 static bfd_boolean elf32_vax_set_private_flags
60 PARAMS ((bfd *, flagword));
61 static bfd_boolean elf32_vax_merge_private_bfd_data
62 PARAMS ((bfd *, bfd *));
63 static bfd_boolean elf32_vax_print_private_bfd_data
64 PARAMS ((bfd *, PTR));
66 static reloc_howto_type howto_table[] = {
67 HOWTO (R_VAX_NONE, /* type */
69 0, /* size (0 = byte, 1 = short, 2 = long) */
71 FALSE, /* pc_relative */
73 complain_overflow_dont, /* complain_on_overflow */
74 bfd_elf_generic_reloc, /* special_function */
75 "R_VAX_NONE", /* name */
76 FALSE, /* partial_inplace */
78 0x00000000, /* dst_mask */
79 FALSE), /* pcrel_offset */
81 HOWTO (R_VAX_32, /* type */
83 2, /* size (0 = byte, 1 = short, 2 = long) */
85 FALSE, /* pc_relative */
87 complain_overflow_bitfield, /* complain_on_overflow */
88 bfd_elf_generic_reloc, /* special_function */
89 "R_VAX_32", /* name */
90 FALSE, /* partial_inplace */
92 0xffffffff, /* dst_mask */
93 FALSE), /* pcrel_offset */
95 HOWTO (R_VAX_16, /* type */
97 1, /* size (0 = byte, 1 = short, 2 = long) */
99 FALSE, /* pc_relative */
101 complain_overflow_bitfield, /* complain_on_overflow */
102 bfd_elf_generic_reloc, /* special_function */
103 "R_VAX_16", /* name */
104 FALSE, /* partial_inplace */
106 0x0000ffff, /* dst_mask */
107 FALSE), /* pcrel_offset */
109 HOWTO (R_VAX_8, /* type */
111 0, /* size (0 = byte, 1 = short, 2 = long) */
113 FALSE, /* pc_relative */
115 complain_overflow_bitfield, /* complain_on_overflow */
116 bfd_elf_generic_reloc, /* special_function */
117 "R_VAX_8", /* name */
118 FALSE, /* partial_inplace */
120 0x000000ff, /* dst_mask */
121 FALSE), /* pcrel_offset */
123 HOWTO (R_VAX_PC32, /* type */
125 2, /* size (0 = byte, 1 = short, 2 = long) */
127 TRUE, /* pc_relative */
129 complain_overflow_bitfield, /* complain_on_overflow */
130 bfd_elf_generic_reloc, /* special_function */
131 "R_VAX_PC32", /* name */
132 FALSE, /* partial_inplace */
134 0xffffffff, /* dst_mask */
135 TRUE), /* pcrel_offset */
137 HOWTO (R_VAX_PC16, /* type */
139 1, /* size (0 = byte, 1 = short, 2 = long) */
141 TRUE, /* pc_relative */
143 complain_overflow_signed, /* complain_on_overflow */
144 bfd_elf_generic_reloc, /* special_function */
145 "R_VAX_PC16", /* name */
146 FALSE, /* partial_inplace */
148 0x0000ffff, /* dst_mask */
149 TRUE), /* pcrel_offset */
151 HOWTO (R_VAX_PC8, /* type */
153 0, /* size (0 = byte, 1 = short, 2 = long) */
155 TRUE, /* pc_relative */
157 complain_overflow_signed, /* complain_on_overflow */
158 bfd_elf_generic_reloc, /* special_function */
159 "R_VAX_PC8", /* name */
160 FALSE, /* partial_inplace */
162 0x000000ff, /* dst_mask */
163 TRUE), /* pcrel_offset */
165 HOWTO (R_VAX_GOT32, /* type */
167 2, /* size (0 = byte, 1 = short, 2 = long) */
169 TRUE, /* pc_relative */
171 complain_overflow_bitfield, /* complain_on_overflow */
172 bfd_elf_generic_reloc, /* special_function */
173 "R_VAX_GOT32", /* name */
174 FALSE, /* partial_inplace */
176 0xffffffff, /* dst_mask */
177 TRUE), /* pcrel_offset */
185 HOWTO (R_VAX_PLT32, /* type */
187 2, /* size (0 = byte, 1 = short, 2 = long) */
189 TRUE, /* pc_relative */
191 complain_overflow_bitfield, /* complain_on_overflow */
192 bfd_elf_generic_reloc, /* special_function */
193 "R_VAX_PLT32", /* name */
194 FALSE, /* partial_inplace */
196 0xffffffff, /* dst_mask */
197 TRUE), /* pcrel_offset */
205 HOWTO (R_VAX_COPY, /* type */
207 0, /* size (0 = byte, 1 = short, 2 = long) */
209 FALSE, /* pc_relative */
211 complain_overflow_dont, /* complain_on_overflow */
212 bfd_elf_generic_reloc, /* special_function */
213 "R_VAX_COPY", /* name */
214 FALSE, /* partial_inplace */
216 0xffffffff, /* dst_mask */
217 FALSE), /* pcrel_offset */
219 HOWTO (R_VAX_GLOB_DAT, /* type */
221 2, /* size (0 = byte, 1 = short, 2 = long) */
223 FALSE, /* pc_relative */
225 complain_overflow_dont, /* complain_on_overflow */
226 bfd_elf_generic_reloc, /* special_function */
227 "R_VAX_GLOB_DAT", /* name */
228 FALSE, /* partial_inplace */
230 0xffffffff, /* dst_mask */
231 FALSE), /* pcrel_offset */
233 HOWTO (R_VAX_JMP_SLOT, /* type */
235 2, /* size (0 = byte, 1 = short, 2 = long) */
237 FALSE, /* pc_relative */
239 complain_overflow_dont, /* complain_on_overflow */
240 bfd_elf_generic_reloc, /* special_function */
241 "R_VAX_JMP_SLOT", /* name */
242 FALSE, /* partial_inplace */
244 0xffffffff, /* dst_mask */
245 FALSE), /* pcrel_offset */
247 HOWTO (R_VAX_RELATIVE, /* type */
249 2, /* size (0 = byte, 1 = short, 2 = long) */
251 FALSE, /* pc_relative */
253 complain_overflow_dont, /* complain_on_overflow */
254 bfd_elf_generic_reloc, /* special_function */
255 "R_VAX_RELATIVE", /* name */
256 FALSE, /* partial_inplace */
258 0xffffffff, /* dst_mask */
259 FALSE), /* pcrel_offset */
261 /* GNU extension to record C++ vtable hierarchy */
262 HOWTO (R_VAX_GNU_VTINHERIT, /* type */
264 2, /* size (0 = byte, 1 = short, 2 = long) */
266 FALSE, /* pc_relative */
268 complain_overflow_dont, /* complain_on_overflow */
269 NULL, /* special_function */
270 "R_VAX_GNU_VTINHERIT", /* name */
271 FALSE, /* partial_inplace */
274 FALSE), /* pcrel_offset */
276 /* GNU extension to record C++ vtable member usage */
277 HOWTO (R_VAX_GNU_VTENTRY, /* type */
279 2, /* size (0 = byte, 1 = short, 2 = long) */
281 FALSE, /* pc_relative */
283 complain_overflow_dont, /* complain_on_overflow */
284 _bfd_elf_rel_vtable_reloc_fn, /* special_function */
285 "R_VAX_GNU_VTENTRY", /* name */
286 FALSE, /* partial_inplace */
289 FALSE), /* pcrel_offset */
293 rtype_to_howto (abfd, cache_ptr, dst)
294 bfd *abfd ATTRIBUTE_UNUSED;
296 Elf_Internal_Rela *dst;
298 BFD_ASSERT (ELF32_R_TYPE(dst->r_info) < (unsigned int) R_VAX_max);
299 cache_ptr->howto = &howto_table[ELF32_R_TYPE(dst->r_info)];
302 #define elf_info_to_howto rtype_to_howto
306 bfd_reloc_code_real_type bfd_val;
309 { BFD_RELOC_NONE, R_VAX_NONE },
310 { BFD_RELOC_32, R_VAX_32 },
311 { BFD_RELOC_16, R_VAX_16 },
312 { BFD_RELOC_8, R_VAX_8 },
313 { BFD_RELOC_32_PCREL, R_VAX_PC32 },
314 { BFD_RELOC_16_PCREL, R_VAX_PC16 },
315 { BFD_RELOC_8_PCREL, R_VAX_PC8 },
316 { BFD_RELOC_32_GOT_PCREL, R_VAX_GOT32 },
317 { BFD_RELOC_32_PLT_PCREL, R_VAX_PLT32 },
318 { BFD_RELOC_NONE, R_VAX_COPY },
319 { BFD_RELOC_VAX_GLOB_DAT, R_VAX_GLOB_DAT },
320 { BFD_RELOC_VAX_JMP_SLOT, R_VAX_JMP_SLOT },
321 { BFD_RELOC_VAX_RELATIVE, R_VAX_RELATIVE },
322 { BFD_RELOC_CTOR, R_VAX_32 },
323 { BFD_RELOC_VTABLE_INHERIT, R_VAX_GNU_VTINHERIT },
324 { BFD_RELOC_VTABLE_ENTRY, R_VAX_GNU_VTENTRY },
327 static reloc_howto_type *
328 reloc_type_lookup (abfd, code)
329 bfd *abfd ATTRIBUTE_UNUSED;
330 bfd_reloc_code_real_type code;
333 for (i = 0; i < sizeof (reloc_map) / sizeof (reloc_map[0]); i++)
335 if (reloc_map[i].bfd_val == code)
336 return &howto_table[reloc_map[i].elf_val];
341 #define bfd_elf32_bfd_reloc_type_lookup reloc_type_lookup
342 #define ELF_ARCH bfd_arch_vax
343 /* end code generated by elf.el */
345 /* Functions for the VAX ELF linker. */
347 /* The name of the dynamic interpreter. This is put in the .interp
350 #define ELF_DYNAMIC_INTERPRETER "/usr/libexec/ld.elf_so"
352 /* The size in bytes of an entry in the procedure linkage table. */
354 #define PLT_ENTRY_SIZE 12
356 /* The first entry in a procedure linkage table looks like this. See
357 the SVR4 ABI VAX supplement to see how this works. */
359 static const bfd_byte elf_vax_plt0_entry[PLT_ENTRY_SIZE] =
361 0xdd, 0xef, /* pushl l^ */
362 0, 0, 0, 0, /* offset to .plt.got + 4 */
363 0x17, 0xff, /* jmp @L^(pc) */
364 0, 0, 0, 0, /* offset to .plt.got + 8 */
367 /* Subsequent entries in a procedure linkage table look like this. */
369 static const bfd_byte elf_vax_plt_entry[PLT_ENTRY_SIZE] =
371 0x40, 0x00, /* .word ^M<r6> */
372 0x16, 0xef, /* jsb L^(pc) */
373 0, 0, 0, 0, /* replaced with offset to start of .plt */
374 0, 0, 0, 0, /* index into .rela.plt */
377 /* The VAX linker needs to keep track of the number of relocs that it
378 decides to copy in check_relocs for each symbol. This is so that it
379 can discard PC relative relocs if it doesn't need them when linking
380 with -Bsymbolic. We store the information in a field extending the
381 regular ELF linker hash table. */
383 /* This structure keeps track of the number of PC relative relocs we have
384 copied for a given symbol. */
386 struct elf_vax_pcrel_relocs_copied
389 struct elf_vax_pcrel_relocs_copied *next;
390 /* A section in dynobj. */
392 /* Number of relocs copied in this section. */
396 /* VAX ELF linker hash entry. */
398 struct elf_vax_link_hash_entry
400 struct elf_link_hash_entry root;
402 /* Number of PC relative relocs copied for this symbol. */
403 struct elf_vax_pcrel_relocs_copied *pcrel_relocs_copied;
408 /* VAX ELF linker hash table. */
410 struct elf_vax_link_hash_table
412 struct elf_link_hash_table root;
415 /* Declare this now that the above structures are defined. */
417 static bfd_boolean elf_vax_discard_copies
418 PARAMS ((struct elf_vax_link_hash_entry *, PTR));
420 /* Declare this now that the above structures are defined. */
422 static bfd_boolean elf_vax_instantiate_got_entries
423 PARAMS ((struct elf_link_hash_entry *, PTR));
425 /* Traverse an VAX ELF linker hash table. */
427 #define elf_vax_link_hash_traverse(table, func, info) \
428 (elf_link_hash_traverse \
430 (bfd_boolean (*) PARAMS ((struct elf_link_hash_entry *, PTR))) (func), \
433 /* Get the VAX ELF linker hash table from a link_info structure. */
435 #define elf_vax_hash_table(p) \
436 ((struct elf_vax_link_hash_table *) (p)->hash)
438 /* Create an entry in an VAX ELF linker hash table. */
440 static struct bfd_hash_entry *
441 elf_vax_link_hash_newfunc (entry, table, string)
442 struct bfd_hash_entry *entry;
443 struct bfd_hash_table *table;
446 struct elf_vax_link_hash_entry *ret =
447 (struct elf_vax_link_hash_entry *) entry;
449 /* Allocate the structure if it has not already been allocated by a
451 if (ret == (struct elf_vax_link_hash_entry *) NULL)
452 ret = ((struct elf_vax_link_hash_entry *)
453 bfd_hash_allocate (table,
454 sizeof (struct elf_vax_link_hash_entry)));
455 if (ret == (struct elf_vax_link_hash_entry *) NULL)
456 return (struct bfd_hash_entry *) ret;
458 /* Call the allocation method of the superclass. */
459 ret = ((struct elf_vax_link_hash_entry *)
460 _bfd_elf_link_hash_newfunc ((struct bfd_hash_entry *) ret,
462 if (ret != (struct elf_vax_link_hash_entry *) NULL)
464 ret->pcrel_relocs_copied = NULL;
467 return (struct bfd_hash_entry *) ret;
470 /* Create an VAX ELF linker hash table. */
472 static struct bfd_link_hash_table *
473 elf_vax_link_hash_table_create (abfd)
476 struct elf_vax_link_hash_table *ret;
477 bfd_size_type amt = sizeof (struct elf_vax_link_hash_table);
479 ret = (struct elf_vax_link_hash_table *) bfd_malloc (amt);
480 if (ret == (struct elf_vax_link_hash_table *) NULL)
483 if (! _bfd_elf_link_hash_table_init (&ret->root, abfd,
484 elf_vax_link_hash_newfunc))
490 return &ret->root.root;
493 /* Keep vax-specific flags in the ELF header */
495 elf32_vax_set_private_flags (abfd, flags)
499 elf_elfheader (abfd)->e_flags = flags;
500 elf_flags_init (abfd) = TRUE;
504 /* Merge backend specific data from an object file to the output
505 object file when linking. */
507 elf32_vax_merge_private_bfd_data (ibfd, obfd)
514 if ( bfd_get_flavour (ibfd) != bfd_target_elf_flavour
515 || bfd_get_flavour (obfd) != bfd_target_elf_flavour)
518 in_flags = elf_elfheader (ibfd)->e_flags;
519 out_flags = elf_elfheader (obfd)->e_flags;
521 if (!elf_flags_init (obfd))
523 elf_flags_init (obfd) = TRUE;
524 elf_elfheader (obfd)->e_flags = in_flags;
530 /* Display the flags field */
532 elf32_vax_print_private_bfd_data (abfd, ptr)
536 FILE *file = (FILE *) ptr;
538 BFD_ASSERT (abfd != NULL && ptr != NULL);
540 /* Print normal ELF private data. */
541 _bfd_elf_print_private_bfd_data (abfd, ptr);
543 /* Ignore init flag - it may not be set, despite the flags field containing valid data. */
545 /* xgettext:c-format */
546 fprintf (file, _("private flags = %lx:"), elf_elfheader (abfd)->e_flags);
548 if (elf_elfheader (abfd)->e_flags & EF_VAX_NONPIC)
549 fprintf (file, _(" [nonpic]"));
551 if (elf_elfheader (abfd)->e_flags & EF_VAX_DFLOAT)
552 fprintf (file, _(" [d-float]"));
554 if (elf_elfheader (abfd)->e_flags & EF_VAX_GFLOAT)
555 fprintf (file, _(" [g-float]"));
561 /* Look through the relocs for a section during the first phase, and
562 allocate space in the global offset table or procedure linkage
566 elf_vax_check_relocs (abfd, info, sec, relocs)
568 struct bfd_link_info *info;
570 const Elf_Internal_Rela *relocs;
573 Elf_Internal_Shdr *symtab_hdr;
574 struct elf_link_hash_entry **sym_hashes;
575 const Elf_Internal_Rela *rel;
576 const Elf_Internal_Rela *rel_end;
581 if (info->relocatable)
584 dynobj = elf_hash_table (info)->dynobj;
585 symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
586 sym_hashes = elf_sym_hashes (abfd);
592 rel_end = relocs + sec->reloc_count;
593 for (rel = relocs; rel < rel_end; rel++)
595 unsigned long r_symndx;
596 struct elf_link_hash_entry *h;
598 r_symndx = ELF32_R_SYM (rel->r_info);
600 if (r_symndx < symtab_hdr->sh_info)
603 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
605 switch (ELF32_R_TYPE (rel->r_info))
609 && strcmp (h->root.root.string, "_GLOBAL_OFFSET_TABLE_") == 0)
612 /* This symbol requires a global offset table entry. */
616 /* Create the .got section. */
617 elf_hash_table (info)->dynobj = dynobj = abfd;
618 if (!_bfd_elf_create_got_section (dynobj, info))
624 sgot = bfd_get_section_by_name (dynobj, ".got");
625 BFD_ASSERT (sgot != NULL);
629 && (h != NULL || info->shared))
631 srelgot = bfd_get_section_by_name (dynobj, ".rela.got");
634 srelgot = bfd_make_section (dynobj, ".rela.got");
636 || !bfd_set_section_flags (dynobj, srelgot,
643 || !bfd_set_section_alignment (dynobj, srelgot, 2))
650 struct elf_vax_link_hash_entry *eh;
652 eh = (struct elf_vax_link_hash_entry *) h;
653 if (h->got.refcount == -1)
656 eh->got_addend = rel->r_addend;
661 if (eh->got_addend != (bfd_vma) rel->r_addend)
662 (*_bfd_error_handler)
663 (_("%s: warning: GOT addend of %ld to `%s' does not match previous GOT addend of %ld"),
664 bfd_get_filename (abfd), rel->r_addend,
673 /* This symbol requires a procedure linkage table entry. We
674 actually build the entry in adjust_dynamic_symbol,
675 because this might be a case of linking PIC code which is
676 never referenced by a dynamic object, in which case we
677 don't need to generate a procedure linkage table entry
680 /* If this is a local symbol, we resolve it directly without
681 creating a procedure linkage table entry. */
686 if (h->plt.refcount == -1)
695 /* If we are creating a shared library and this is not a local
696 symbol, we need to copy the reloc into the shared library.
697 However when linking with -Bsymbolic and this is a global
698 symbol which is defined in an object we are including in the
699 link (i.e., DEF_REGULAR is set), then we can resolve the
700 reloc directly. At this point we have not seen all the input
701 files, so it is possible that DEF_REGULAR is not set now but
702 will be set later (it is never cleared). We account for that
703 possibility below by storing information in the
704 pcrel_relocs_copied field of the hash table entry. */
706 && (sec->flags & SEC_ALLOC) != 0
709 || !h->def_regular)))
713 /* Make sure a plt entry is created for this symbol if
714 it turns out to be a function defined by a dynamic
716 if (h->plt.refcount == -1)
729 /* Make sure a plt entry is created for this symbol if it
730 turns out to be a function defined by a dynamic object. */
731 if (h->plt.refcount == -1)
737 /* If we are creating a shared library, we need to copy the
738 reloc into the shared library. */
740 && (sec->flags & SEC_ALLOC) != 0)
742 /* When creating a shared object, we must copy these
743 reloc types into the output file. We create a reloc
744 section in dynobj and make room for this reloc. */
749 name = (bfd_elf_string_from_elf_section
751 elf_elfheader (abfd)->e_shstrndx,
752 elf_section_data (sec)->rel_hdr.sh_name));
756 BFD_ASSERT (strncmp (name, ".rela", 5) == 0
757 && strcmp (bfd_get_section_name (abfd, sec),
760 sreloc = bfd_get_section_by_name (dynobj, name);
763 sreloc = bfd_make_section (dynobj, name);
765 || !bfd_set_section_flags (dynobj, sreloc,
772 || !bfd_set_section_alignment (dynobj, sreloc, 2))
775 if (sec->flags & SEC_READONLY)
776 info->flags |= DF_TEXTREL;
779 sreloc->size += sizeof (Elf32_External_Rela);
781 /* If we are linking with -Bsymbolic, we count the number of
782 PC relative relocations we have entered for this symbol,
783 so that we can discard them again if the symbol is later
784 defined by a regular object. Note that this function is
785 only called if we are using a vaxelf linker hash table,
786 which means that h is really a pointer to an
787 elf_vax_link_hash_entry. */
788 if ((ELF32_R_TYPE (rel->r_info) == R_VAX_PC8
789 || ELF32_R_TYPE (rel->r_info) == R_VAX_PC16
790 || ELF32_R_TYPE (rel->r_info) == R_VAX_PC32)
793 struct elf_vax_link_hash_entry *eh;
794 struct elf_vax_pcrel_relocs_copied *p;
796 eh = (struct elf_vax_link_hash_entry *) h;
798 for (p = eh->pcrel_relocs_copied; p != NULL; p = p->next)
799 if (p->section == sreloc)
804 p = ((struct elf_vax_pcrel_relocs_copied *)
805 bfd_alloc (dynobj, (bfd_size_type) sizeof *p));
808 p->next = eh->pcrel_relocs_copied;
809 eh->pcrel_relocs_copied = p;
820 /* This relocation describes the C++ object vtable hierarchy.
821 Reconstruct it for later use during GC. */
822 case R_VAX_GNU_VTINHERIT:
823 if (!bfd_elf_gc_record_vtinherit (abfd, sec, h, rel->r_offset))
827 /* This relocation describes which C++ vtable entries are actually
828 used. Record for later use during GC. */
829 case R_VAX_GNU_VTENTRY:
830 if (!bfd_elf_gc_record_vtentry (abfd, sec, h, rel->r_addend))
842 /* Return the section that should be marked against GC for a given
846 elf_vax_gc_mark_hook (sec, info, rel, h, sym)
848 struct bfd_link_info *info ATTRIBUTE_UNUSED;
849 Elf_Internal_Rela *rel;
850 struct elf_link_hash_entry *h;
851 Elf_Internal_Sym *sym;
855 switch (ELF32_R_TYPE (rel->r_info))
857 case R_VAX_GNU_VTINHERIT:
858 case R_VAX_GNU_VTENTRY:
862 switch (h->root.type)
867 case bfd_link_hash_defined:
868 case bfd_link_hash_defweak:
869 return h->root.u.def.section;
871 case bfd_link_hash_common:
872 return h->root.u.c.p->section;
877 return bfd_section_from_elf_index (sec->owner, sym->st_shndx);
882 /* Update the got entry reference counts for the section being removed. */
885 elf_vax_gc_sweep_hook (abfd, info, sec, relocs)
887 struct bfd_link_info *info;
889 const Elf_Internal_Rela *relocs;
891 Elf_Internal_Shdr *symtab_hdr;
892 struct elf_link_hash_entry **sym_hashes;
893 const Elf_Internal_Rela *rel, *relend;
896 dynobj = elf_hash_table (info)->dynobj;
900 symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
901 sym_hashes = elf_sym_hashes (abfd);
903 relend = relocs + sec->reloc_count;
904 for (rel = relocs; rel < relend; rel++)
906 unsigned long r_symndx;
907 struct elf_link_hash_entry *h;
909 switch (ELF32_R_TYPE (rel->r_info))
912 r_symndx = ELF32_R_SYM (rel->r_info);
913 if (r_symndx >= symtab_hdr->sh_info)
915 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
916 if (h->got.refcount > 0)
928 r_symndx = ELF32_R_SYM (rel->r_info);
929 if (r_symndx >= symtab_hdr->sh_info)
931 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
932 if (h->plt.refcount > 0)
945 /* Adjust a symbol defined by a dynamic object and referenced by a
946 regular object. The current definition is in some section of the
947 dynamic object, but we're not including those sections. We have to
948 change the definition to something the rest of the link can
952 elf_vax_adjust_dynamic_symbol (info, h)
953 struct bfd_link_info *info;
954 struct elf_link_hash_entry *h;
958 unsigned int power_of_two;
960 dynobj = elf_hash_table (info)->dynobj;
962 /* Make sure we know what is going on here. */
963 BFD_ASSERT (dynobj != NULL
965 || h->u.weakdef != NULL
968 && !h->def_regular)));
970 /* If this is a function, put it in the procedure linkage table. We
971 will fill in the contents of the procedure linkage table later,
972 when we know the address of the .got section. */
973 if (h->type == STT_FUNC
979 /* We must always create the plt entry if it was referenced
980 by a PLTxxO relocation. In this case we already recorded
981 it as a dynamic symbol. */
984 /* This case can occur if we saw a PLTxx reloc in an input
985 file, but the symbol was never referred to by a dynamic
986 object. In such a case, we don't actually need to build
987 a procedure linkage table, and we can just do a PCxx
989 BFD_ASSERT (h->needs_plt);
990 h->plt.offset = (bfd_vma) -1;
994 /* GC may have rendered this entry unused. */
995 if (h->plt.refcount <= 0)
998 h->plt.offset = (bfd_vma) -1;
1002 /* Make sure this symbol is output as a dynamic symbol. */
1003 if (h->dynindx == -1)
1005 if (! bfd_elf_link_record_dynamic_symbol (info, h))
1009 s = bfd_get_section_by_name (dynobj, ".plt");
1010 BFD_ASSERT (s != NULL);
1012 /* If this is the first .plt entry, make room for the special
1016 s->size += PLT_ENTRY_SIZE;
1019 /* If this symbol is not defined in a regular file, and we are
1020 not generating a shared library, then set the symbol to this
1021 location in the .plt. This is required to make function
1022 pointers compare as equal between the normal executable and
1023 the shared library. */
1027 h->root.u.def.section = s;
1028 h->root.u.def.value = s->size;
1031 h->plt.offset = s->size;
1033 /* Make room for this entry. */
1034 s->size += PLT_ENTRY_SIZE;
1036 /* We also need to make an entry in the .got.plt section, which
1037 will be placed in the .got section by the linker script. */
1039 s = bfd_get_section_by_name (dynobj, ".got.plt");
1040 BFD_ASSERT (s != NULL);
1043 /* We also need to make an entry in the .rela.plt section. */
1045 s = bfd_get_section_by_name (dynobj, ".rela.plt");
1046 BFD_ASSERT (s != NULL);
1047 s->size += sizeof (Elf32_External_Rela);
1052 /* Reinitialize the plt offset now that it is not used as a reference
1054 h->plt.offset = (bfd_vma) -1;
1056 /* If this is a weak symbol, and there is a real definition, the
1057 processor independent code will have arranged for us to see the
1058 real definition first, and we can just use the same value. */
1059 if (h->u.weakdef != NULL)
1061 BFD_ASSERT (h->u.weakdef->root.type == bfd_link_hash_defined
1062 || h->u.weakdef->root.type == bfd_link_hash_defweak);
1063 h->root.u.def.section = h->u.weakdef->root.u.def.section;
1064 h->root.u.def.value = h->u.weakdef->root.u.def.value;
1068 /* This is a reference to a symbol defined by a dynamic object which
1069 is not a function. */
1071 /* If we are creating a shared library, we must presume that the
1072 only references to the symbol are via the global offset table.
1073 For such cases we need not do anything here; the relocations will
1074 be handled correctly by relocate_section. */
1078 /* We must allocate the symbol in our .dynbss section, which will
1079 become part of the .bss section of the executable. There will be
1080 an entry for this symbol in the .dynsym section. The dynamic
1081 object will contain position independent code, so all references
1082 from the dynamic object to this symbol will go through the global
1083 offset table. The dynamic linker will use the .dynsym entry to
1084 determine the address it must put in the global offset table, so
1085 both the dynamic object and the regular object will refer to the
1086 same memory location for the variable. */
1088 s = bfd_get_section_by_name (dynobj, ".dynbss");
1089 BFD_ASSERT (s != NULL);
1091 /* We must generate a R_VAX_COPY reloc to tell the dynamic linker to
1092 copy the initial value out of the dynamic object and into the
1093 runtime process image. We need to remember the offset into the
1094 .rela.bss section we are going to use. */
1095 if ((h->root.u.def.section->flags & SEC_ALLOC) != 0)
1099 srel = bfd_get_section_by_name (dynobj, ".rela.bss");
1100 BFD_ASSERT (srel != NULL);
1101 srel->size += sizeof (Elf32_External_Rela);
1105 /* We need to figure out the alignment required for this symbol. I
1106 have no idea how ELF linkers handle this. */
1107 power_of_two = bfd_log2 (h->size);
1108 if (power_of_two > 3)
1111 /* Apply the required alignment. */
1112 s->size = BFD_ALIGN (s->size, (bfd_size_type) (1 << power_of_two));
1113 if (power_of_two > bfd_get_section_alignment (dynobj, s))
1115 if (!bfd_set_section_alignment (dynobj, s, power_of_two))
1119 /* Define the symbol as being at this point in the section. */
1120 h->root.u.def.section = s;
1121 h->root.u.def.value = s->size;
1123 /* Increment the section size to make room for the symbol. */
1129 /* Set the sizes of the dynamic sections. */
1132 elf_vax_size_dynamic_sections (output_bfd, info)
1134 struct bfd_link_info *info;
1140 bfd_boolean reltext;
1142 dynobj = elf_hash_table (info)->dynobj;
1143 BFD_ASSERT (dynobj != NULL);
1145 if (elf_hash_table (info)->dynamic_sections_created)
1147 /* Set the contents of the .interp section to the interpreter. */
1148 if (info->executable)
1150 s = bfd_get_section_by_name (dynobj, ".interp");
1151 BFD_ASSERT (s != NULL);
1152 s->size = sizeof ELF_DYNAMIC_INTERPRETER;
1153 s->contents = (unsigned char *) ELF_DYNAMIC_INTERPRETER;
1158 /* We may have created entries in the .rela.got and .got sections.
1159 However, if we are not creating the dynamic sections, we will
1160 not actually use these entries. Reset the size of .rela.got
1161 and .got, which will cause it to get stripped from the output
1163 s = bfd_get_section_by_name (dynobj, ".rela.got");
1166 s = bfd_get_section_by_name (dynobj, ".got.plt");
1169 s = bfd_get_section_by_name (dynobj, ".got");
1174 /* If this is a -Bsymbolic shared link, then we need to discard all PC
1175 relative relocs against symbols defined in a regular object. We
1176 allocated space for them in the check_relocs routine, but we will not
1177 fill them in in the relocate_section routine. */
1178 if (info->shared && info->symbolic)
1179 elf_vax_link_hash_traverse (elf_vax_hash_table (info),
1180 elf_vax_discard_copies,
1183 /* If this is a -Bsymbolic shared link or a static link, we need to
1184 discard all the got entries we've recorded. Otherwise, we need to
1185 instantiate (allocate space for them). */
1186 elf_link_hash_traverse (elf_hash_table (info),
1187 elf_vax_instantiate_got_entries,
1190 /* The check_relocs and adjust_dynamic_symbol entry points have
1191 determined the sizes of the various dynamic sections. Allocate
1196 for (s = dynobj->sections; s != NULL; s = s->next)
1201 if ((s->flags & SEC_LINKER_CREATED) == 0)
1204 /* It's OK to base decisions on the section name, because none
1205 of the dynobj section names depend upon the input files. */
1206 name = bfd_get_section_name (dynobj, s);
1210 if (strcmp (name, ".plt") == 0)
1214 /* Strip this section if we don't need it; see the
1220 /* Remember whether there is a PLT. */
1224 else if (strncmp (name, ".rela", 5) == 0)
1228 /* If we don't need this section, strip it from the
1229 output file. This is mostly to handle .rela.bss and
1230 .rela.plt. We must create both sections in
1231 create_dynamic_sections, because they must be created
1232 before the linker maps input sections to output
1233 sections. The linker does that before
1234 adjust_dynamic_symbol is called, and it is that
1235 function which decides whether anything needs to go
1236 into these sections. */
1243 /* Remember whether there are any reloc sections other
1245 if (strcmp (name, ".rela.plt") != 0)
1247 const char *outname;
1251 /* If this relocation section applies to a read only
1252 section, then we probably need a DT_TEXTREL
1253 entry. .rela.plt is actually associated with
1254 .got.plt, which is never readonly. */
1255 outname = bfd_get_section_name (output_bfd,
1257 target = bfd_get_section_by_name (output_bfd, outname + 5);
1259 && (target->flags & SEC_READONLY) != 0
1260 && (target->flags & SEC_ALLOC) != 0)
1264 /* We use the reloc_count field as a counter if we need
1265 to copy relocs into the output file. */
1269 else if (strncmp (name, ".got", 4) != 0)
1271 /* It's not one of our sections, so don't allocate space. */
1277 _bfd_strip_section_from_output (info, s);
1281 /* Allocate memory for the section contents. */
1282 s->contents = (bfd_byte *) bfd_alloc (dynobj, s->size);
1283 if (s->contents == NULL && s->size != 0)
1287 if (elf_hash_table (info)->dynamic_sections_created)
1289 /* Add some entries to the .dynamic section. We fill in the
1290 values later, in elf_vax_finish_dynamic_sections, but we
1291 must add the entries now so that we get the correct size for
1292 the .dynamic section. The DT_DEBUG entry is filled in by the
1293 dynamic linker and used by the debugger. */
1294 #define add_dynamic_entry(TAG, VAL) \
1295 _bfd_elf_add_dynamic_entry (info, TAG, VAL)
1299 if (!add_dynamic_entry (DT_DEBUG, 0))
1305 if (!add_dynamic_entry (DT_PLTGOT, 0)
1306 || !add_dynamic_entry (DT_PLTRELSZ, 0)
1307 || !add_dynamic_entry (DT_PLTREL, DT_RELA)
1308 || !add_dynamic_entry (DT_JMPREL, 0))
1314 if (!add_dynamic_entry (DT_RELA, 0)
1315 || !add_dynamic_entry (DT_RELASZ, 0)
1316 || !add_dynamic_entry (DT_RELAENT, sizeof (Elf32_External_Rela)))
1320 if (reltext || (info->flags & DF_TEXTREL) != 0)
1322 if (!add_dynamic_entry (DT_TEXTREL, 0))
1326 #undef add_dynamic_entry
1331 /* This function is called via elf_vax_link_hash_traverse if we are
1332 creating a shared object with -Bsymbolic. It discards the space
1333 allocated to copy PC relative relocs against symbols which are defined
1334 in regular objects. We allocated space for them in the check_relocs
1335 routine, but we won't fill them in in the relocate_section routine. */
1338 elf_vax_discard_copies (h, ignore)
1339 struct elf_vax_link_hash_entry *h;
1340 PTR ignore ATTRIBUTE_UNUSED;
1342 struct elf_vax_pcrel_relocs_copied *s;
1344 if (h->root.root.type == bfd_link_hash_warning)
1345 h = (struct elf_vax_link_hash_entry *) h->root.root.u.i.link;
1347 /* We only discard relocs for symbols defined in a regular object. */
1348 if (!h->root.def_regular)
1351 for (s = h->pcrel_relocs_copied; s != NULL; s = s->next)
1352 s->section->size -= s->count * sizeof (Elf32_External_Rela);
1357 /* This function is called via elf_link_hash_traverse. It looks for entries
1358 that have GOT or PLT (.GOT) references. If creating a static object or a
1359 shared object with -Bsymbolic, it resets the reference count back to 0
1360 and sets the offset to -1 so normal PC32 relocation will be done. If
1361 creating a shared object or executable, space in the .got and .rela.got
1362 will be reserved for the symbol. */
1365 elf_vax_instantiate_got_entries (h, infoptr)
1366 struct elf_link_hash_entry *h;
1369 struct bfd_link_info *info = (struct bfd_link_info *) infoptr;
1374 /* We don't care about non-GOT (and non-PLT) entries. */
1375 if (h->got.refcount <= 0 && h->plt.refcount <= 0)
1378 dynobj = elf_hash_table (info)->dynobj;
1382 sgot = bfd_get_section_by_name (dynobj, ".got");
1383 srelgot = bfd_get_section_by_name (dynobj, ".rela.got");
1385 if (!elf_hash_table (info)->dynamic_sections_created
1386 || (info->shared && info->symbolic))
1388 h->got.refcount = 0;
1389 h->got.offset = (bfd_vma) -1;
1390 h->plt.refcount = 0;
1391 h->plt.offset = (bfd_vma) -1;
1393 else if (h->got.refcount > 0)
1395 /* Make sure this symbol is output as a dynamic symbol. */
1396 if (h->dynindx == -1)
1398 if (!bfd_elf_link_record_dynamic_symbol (info, h))
1402 /* Allocate space in the .got and .rela.got sections. */
1404 srelgot->size += sizeof (Elf32_External_Rela);
1410 /* Relocate an VAX ELF section. */
1413 elf_vax_relocate_section (output_bfd, info, input_bfd, input_section,
1414 contents, relocs, local_syms, local_sections)
1416 struct bfd_link_info *info;
1418 asection *input_section;
1420 Elf_Internal_Rela *relocs;
1421 Elf_Internal_Sym *local_syms;
1422 asection **local_sections;
1425 Elf_Internal_Shdr *symtab_hdr;
1426 struct elf_link_hash_entry **sym_hashes;
1427 bfd_vma *local_got_offsets;
1434 Elf_Internal_Rela *rel;
1435 Elf_Internal_Rela *relend;
1437 if (info->relocatable)
1440 dynobj = elf_hash_table (info)->dynobj;
1441 symtab_hdr = &elf_tdata (input_bfd)->symtab_hdr;
1442 sym_hashes = elf_sym_hashes (input_bfd);
1443 local_got_offsets = elf_local_got_offsets (input_bfd);
1451 relend = relocs + input_section->reloc_count;
1452 for (; rel < relend; rel++)
1455 reloc_howto_type *howto;
1456 unsigned long r_symndx;
1457 struct elf_link_hash_entry *h;
1458 Elf_Internal_Sym *sym;
1461 bfd_reloc_status_type r;
1463 r_type = ELF32_R_TYPE (rel->r_info);
1464 if (r_type < 0 || r_type >= (int) R_VAX_max)
1466 bfd_set_error (bfd_error_bad_value);
1469 howto = howto_table + r_type;
1471 /* This is a final link. */
1472 r_symndx = ELF32_R_SYM (rel->r_info);
1476 if (r_symndx < symtab_hdr->sh_info)
1478 sym = local_syms + r_symndx;
1479 sec = local_sections[r_symndx];
1480 relocation = _bfd_elf_rela_local_sym (output_bfd, sym, &sec, rel);
1484 bfd_boolean unresolved_reloc;
1487 RELOC_FOR_GLOBAL_SYMBOL (info, input_bfd, input_section, rel,
1488 r_symndx, symtab_hdr, sym_hashes,
1490 unresolved_reloc, warned);
1492 if ((h->root.type == bfd_link_hash_defined
1493 || h->root.type == bfd_link_hash_defweak)
1494 && ((r_type == R_VAX_PLT32
1495 && h->plt.offset != (bfd_vma) -1
1496 && elf_hash_table (info)->dynamic_sections_created)
1497 || (r_type == R_VAX_GOT32
1498 && strcmp (h->root.root.string,
1499 "_GLOBAL_OFFSET_TABLE_") != 0
1500 && elf_hash_table (info)->dynamic_sections_created
1502 || (! info->symbolic && h->dynindx != -1)
1503 || !h->def_regular))
1505 && ((! info->symbolic && h->dynindx != -1)
1507 && ((input_section->flags & SEC_ALLOC) != 0
1508 /* DWARF will emit R_VAX_32 relocations in its
1509 sections against symbols defined externally
1510 in shared libraries. We can't do anything
1513 || ((input_section->flags & SEC_DEBUGGING) != 0
1515 && (r_type == R_VAX_8
1516 || r_type == R_VAX_16
1517 || r_type == R_VAX_32
1518 || r_type == R_VAX_PC8
1519 || r_type == R_VAX_PC16
1520 || r_type == R_VAX_PC32))))
1521 /* In these cases, we don't need the relocation
1522 value. We check specially because in some
1523 obscure cases sec->output_section will be NULL. */
1530 /* Relocation is to the address of the entry for this symbol
1531 in the global offset table. */
1532 if (h == NULL || h->got.offset == (bfd_vma) -1)
1535 /* Relocation is the offset of the entry for this symbol in
1536 the global offset table. */
1543 sgot = bfd_get_section_by_name (dynobj, ".got");
1544 BFD_ASSERT (sgot != NULL);
1547 BFD_ASSERT (h != NULL);
1548 off = h->got.offset;
1549 BFD_ASSERT (off != (bfd_vma) -1);
1550 BFD_ASSERT (off < sgot->size);
1556 /* The symbol was forced to be local
1557 because of a version file.. We must initialize
1558 this entry in the global offset table. Since
1559 the offset must always be a multiple of 4, we
1560 use the least significant bit to record whether
1561 we have initialized it already.
1563 When doing a dynamic link, we create a .rela.got
1564 relocation entry to initialize the value. This
1565 is done in the finish_dynamic_symbol routine. */
1570 bfd_put_32 (output_bfd, relocation + rel->r_addend,
1571 sgot->contents + off);
1575 bfd_put_32 (output_bfd, rel->r_addend, sgot->contents + off);
1578 relocation = sgot->output_offset + off;
1579 /* The GOT relocation uses the addend. */
1582 /* Change the reference to be indirect. */
1583 contents[rel->r_offset - 1] |= 0x10;
1584 relocation += sgot->output_section->vma;
1589 /* Relocation is to the entry for this symbol in the
1590 procedure linkage table. */
1592 /* Resolve a PLTxx reloc against a local symbol directly,
1593 without using the procedure linkage table. */
1597 if (h->plt.offset == (bfd_vma) -1
1598 || !elf_hash_table (info)->dynamic_sections_created)
1600 /* We didn't make a PLT entry for this symbol. This
1601 happens when statically linking PIC code, or when
1602 using -Bsymbolic. */
1608 splt = bfd_get_section_by_name (dynobj, ".plt");
1609 BFD_ASSERT (splt != NULL);
1612 if (sgotplt == NULL)
1614 sgotplt = bfd_get_section_by_name (dynobj, ".got.plt");
1615 BFD_ASSERT (splt != NULL);
1618 plt_index = h->plt.offset / PLT_ENTRY_SIZE - 1;
1620 /* Get the offset into the .got table of the entry that
1621 corresponds to this function. Each .got entry is 4 bytes.
1622 The first two are reserved. */
1623 got_offset = (plt_index + 3) * 4;
1625 /* We want the relocate to point into the .got.plt instead
1626 of the plt itself. */
1627 relocation = (sgotplt->output_section->vma
1628 + sgotplt->output_offset
1630 contents[rel->r_offset-1] |= 0x10; /* make indirect */
1631 if (rel->r_addend == 2)
1635 else if (rel->r_addend != 0)
1636 (*_bfd_error_handler)
1637 (_("%s: warning: PLT addend of %d to `%s' from %s section ignored"),
1638 bfd_get_filename (input_bfd), rel->r_addend,
1639 h->root.root.string,
1640 bfd_get_section_name (input_bfd, input_section));
1656 && (input_section->flags & SEC_ALLOC) != 0
1657 && ((r_type != R_VAX_PC8
1658 && r_type != R_VAX_PC16
1659 && r_type != R_VAX_PC32)
1661 || !h->def_regular)))
1663 Elf_Internal_Rela outrel;
1665 bfd_boolean skip, relocate;
1667 /* When generating a shared object, these relocations
1668 are copied into the output file to be resolved at run
1674 name = (bfd_elf_string_from_elf_section
1676 elf_elfheader (input_bfd)->e_shstrndx,
1677 elf_section_data (input_section)->rel_hdr.sh_name));
1681 BFD_ASSERT (strncmp (name, ".rela", 5) == 0
1682 && strcmp (bfd_get_section_name (input_bfd,
1686 sreloc = bfd_get_section_by_name (dynobj, name);
1687 BFD_ASSERT (sreloc != NULL);
1694 _bfd_elf_section_offset (output_bfd, info, input_section,
1696 if (outrel.r_offset == (bfd_vma) -1)
1698 if (outrel.r_offset == (bfd_vma) -2)
1699 skip = TRUE, relocate = TRUE;
1700 outrel.r_offset += (input_section->output_section->vma
1701 + input_section->output_offset);
1704 memset (&outrel, 0, sizeof outrel);
1705 /* h->dynindx may be -1 if the symbol was marked to
1708 && ((! info->symbolic && h->dynindx != -1)
1709 || !h->def_regular))
1711 BFD_ASSERT (h->dynindx != -1);
1712 outrel.r_info = ELF32_R_INFO (h->dynindx, r_type);
1713 outrel.r_addend = relocation + rel->r_addend;
1717 if (r_type == R_VAX_32)
1720 outrel.r_info = ELF32_R_INFO (0, R_VAX_RELATIVE);
1721 BFD_ASSERT (bfd_get_signed_32 (input_bfd,
1722 &contents[rel->r_offset]) == 0);
1723 outrel.r_addend = relocation + rel->r_addend;
1729 if (bfd_is_abs_section (sec))
1731 else if (sec == NULL || sec->owner == NULL)
1733 bfd_set_error (bfd_error_bad_value);
1740 osec = sec->output_section;
1741 indx = elf_section_data (osec)->dynindx;
1742 BFD_ASSERT (indx > 0);
1745 outrel.r_info = ELF32_R_INFO (indx, r_type);
1746 outrel.r_addend = relocation + rel->r_addend;
1750 if (!strcmp (bfd_get_section_name (input_bfd, input_section),
1753 && ELF32_R_TYPE(outrel.r_info) != R_VAX_32
1754 && ELF32_R_TYPE(outrel.r_info) != R_VAX_RELATIVE
1755 && ELF32_R_TYPE(outrel.r_info) != R_VAX_COPY
1756 && ELF32_R_TYPE(outrel.r_info) != R_VAX_JMP_SLOT
1757 && ELF32_R_TYPE(outrel.r_info) != R_VAX_GLOB_DAT))
1760 (*_bfd_error_handler)
1761 (_("%s: warning: %s relocation against symbol `%s' from %s section"),
1762 bfd_get_filename (input_bfd), howto->name,
1763 h->root.root.string,
1764 bfd_get_section_name (input_bfd, input_section));
1766 (*_bfd_error_handler)
1767 (_("%s: warning: %s relocation to 0x%x from %s section"),
1768 bfd_get_filename (input_bfd), howto->name,
1770 bfd_get_section_name (input_bfd, input_section));
1772 loc = sreloc->contents;
1773 loc += sreloc->reloc_count++ * sizeof (Elf32_External_Rela);
1774 bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc);
1776 /* This reloc will be computed at runtime, so there's no
1777 need to do anything now, except for R_VAX_32
1778 relocations that have been turned into
1786 case R_VAX_GNU_VTINHERIT:
1787 case R_VAX_GNU_VTENTRY:
1788 /* These are no-ops in the end. */
1795 /* VAX PCREL relocations are from the end of relocation, not the start.
1796 So subtract the difference from the relocation amount since we can't
1797 add it to the offset. */
1798 if (howto->pc_relative && howto->pcrel_offset)
1799 relocation -= bfd_get_reloc_size(howto);
1801 r = _bfd_final_link_relocate (howto, input_bfd, input_section,
1802 contents, rel->r_offset,
1803 relocation, rel->r_addend);
1805 if (r != bfd_reloc_ok)
1810 case bfd_reloc_outofrange:
1812 case bfd_reloc_overflow:
1820 name = bfd_elf_string_from_elf_section (input_bfd,
1821 symtab_hdr->sh_link,
1826 name = bfd_section_name (input_bfd, sec);
1828 if (!(info->callbacks->reloc_overflow
1829 (info, (h ? &h->root : NULL), name, howto->name,
1830 (bfd_vma) 0, input_bfd, input_section,
1842 /* Finish up dynamic symbol handling. We set the contents of various
1843 dynamic sections here. */
1846 elf_vax_finish_dynamic_symbol (output_bfd, info, h, sym)
1848 struct bfd_link_info *info;
1849 struct elf_link_hash_entry *h;
1850 Elf_Internal_Sym *sym;
1854 dynobj = elf_hash_table (info)->dynobj;
1856 if (h->plt.offset != (bfd_vma) -1)
1864 Elf_Internal_Rela rela;
1867 /* This symbol has an entry in the procedure linkage table. Set
1869 BFD_ASSERT (h->dynindx != -1);
1871 splt = bfd_get_section_by_name (dynobj, ".plt");
1872 sgot = bfd_get_section_by_name (dynobj, ".got.plt");
1873 srela = bfd_get_section_by_name (dynobj, ".rela.plt");
1874 BFD_ASSERT (splt != NULL && sgot != NULL && srela != NULL);
1876 addend = 2 * (h->plt.offset & 1);
1877 h->plt.offset &= ~1;
1879 /* Get the index in the procedure linkage table which
1880 corresponds to this symbol. This is the index of this symbol
1881 in all the symbols for which we are making plt entries. The
1882 first entry in the procedure linkage table is reserved. */
1883 plt_index = h->plt.offset / PLT_ENTRY_SIZE - 1;
1885 /* Get the offset into the .got table of the entry that
1886 corresponds to this function. Each .got entry is 4 bytes.
1887 The first two are reserved. */
1888 got_offset = (plt_index + 3) * 4;
1890 /* Fill in the entry in the procedure linkage table. */
1891 memcpy (splt->contents + h->plt.offset, elf_vax_plt_entry,
1894 /* The offset is relative to the first extension word. */
1895 bfd_put_32 (output_bfd,
1896 -(h->plt.offset + 8),
1897 splt->contents + h->plt.offset + 4);
1899 bfd_put_32 (output_bfd, plt_index * sizeof (Elf32_External_Rela),
1900 splt->contents + h->plt.offset + 8);
1902 /* Fill in the entry in the global offset table. */
1903 bfd_put_32 (output_bfd,
1904 (splt->output_section->vma
1905 + splt->output_offset
1906 + h->plt.offset) + addend,
1907 sgot->contents + got_offset);
1909 /* Fill in the entry in the .rela.plt section. */
1910 rela.r_offset = (sgot->output_section->vma
1911 + sgot->output_offset
1913 rela.r_info = ELF32_R_INFO (h->dynindx, R_VAX_JMP_SLOT);
1914 rela.r_addend = addend;
1915 loc = srela->contents + plt_index * sizeof (Elf32_External_Rela);
1916 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
1918 if (!h->def_regular)
1920 /* Mark the symbol as undefined, rather than as defined in
1921 the .plt section. Leave the value alone. */
1922 sym->st_shndx = SHN_UNDEF;
1926 if (h->got.offset != (bfd_vma) -1)
1930 Elf_Internal_Rela rela;
1933 /* This symbol has an entry in the global offset table. Set it
1935 sgot = bfd_get_section_by_name (dynobj, ".got");
1936 srela = bfd_get_section_by_name (dynobj, ".rela.got");
1937 BFD_ASSERT (sgot != NULL && srela != NULL);
1939 rela.r_offset = (sgot->output_section->vma
1940 + sgot->output_offset
1941 + (h->got.offset &~ 1));
1943 /* If the symbol was forced to be local because of a version file
1944 locally we just want to emit a RELATIVE reloc. The entry in
1945 the global offset table will already have been initialized in
1946 the relocate_section function. */
1951 rela.r_info = ELF32_R_INFO (0, R_VAX_RELATIVE);
1955 rela.r_info = ELF32_R_INFO (h->dynindx, R_VAX_GLOB_DAT);
1957 rela.r_addend = bfd_get_signed_32 (output_bfd,
1959 + (h->got.offset & ~1)));
1961 loc = srela->contents;
1962 loc += srela->reloc_count++ * sizeof (Elf32_External_Rela);
1963 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
1969 Elf_Internal_Rela rela;
1972 /* This symbol needs a copy reloc. Set it up. */
1973 BFD_ASSERT (h->dynindx != -1
1974 && (h->root.type == bfd_link_hash_defined
1975 || h->root.type == bfd_link_hash_defweak));
1977 s = bfd_get_section_by_name (h->root.u.def.section->owner,
1979 BFD_ASSERT (s != NULL);
1981 rela.r_offset = (h->root.u.def.value
1982 + h->root.u.def.section->output_section->vma
1983 + h->root.u.def.section->output_offset);
1984 rela.r_info = ELF32_R_INFO (h->dynindx, R_VAX_COPY);
1986 loc = s->contents + s->reloc_count++ * sizeof (Elf32_External_Rela);
1987 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
1990 /* Mark _DYNAMIC and _GLOBAL_OFFSET_TABLE_ as absolute. */
1991 if (strcmp (h->root.root.string, "_DYNAMIC") == 0
1992 || strcmp (h->root.root.string, "_GLOBAL_OFFSET_TABLE_") == 0)
1993 sym->st_shndx = SHN_ABS;
1998 /* Finish up the dynamic sections. */
2001 elf_vax_finish_dynamic_sections (output_bfd, info)
2003 struct bfd_link_info *info;
2009 dynobj = elf_hash_table (info)->dynobj;
2011 sgot = bfd_get_section_by_name (dynobj, ".got.plt");
2012 BFD_ASSERT (sgot != NULL);
2013 sdyn = bfd_get_section_by_name (dynobj, ".dynamic");
2015 if (elf_hash_table (info)->dynamic_sections_created)
2018 Elf32_External_Dyn *dyncon, *dynconend;
2020 splt = bfd_get_section_by_name (dynobj, ".plt");
2021 BFD_ASSERT (splt != NULL && sdyn != NULL);
2023 dyncon = (Elf32_External_Dyn *) sdyn->contents;
2024 dynconend = (Elf32_External_Dyn *) (sdyn->contents + sdyn->size);
2025 for (; dyncon < dynconend; dyncon++)
2027 Elf_Internal_Dyn dyn;
2031 bfd_elf32_swap_dyn_in (dynobj, dyncon, &dyn);
2044 s = bfd_get_section_by_name (output_bfd, name);
2045 BFD_ASSERT (s != NULL);
2046 dyn.d_un.d_ptr = s->vma;
2047 bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon);
2051 s = bfd_get_section_by_name (output_bfd, ".rela.plt");
2052 BFD_ASSERT (s != NULL);
2053 dyn.d_un.d_val = s->size;
2054 bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon);
2058 /* The procedure linkage table relocs (DT_JMPREL) should
2059 not be included in the overall relocs (DT_RELA).
2060 Therefore, we override the DT_RELASZ entry here to
2061 make it not include the JMPREL relocs. Since the
2062 linker script arranges for .rela.plt to follow all
2063 other relocation sections, we don't have to worry
2064 about changing the DT_RELA entry. */
2065 s = bfd_get_section_by_name (output_bfd, ".rela.plt");
2067 dyn.d_un.d_val -= s->size;
2068 bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon);
2073 /* Fill in the first entry in the procedure linkage table. */
2076 memcpy (splt->contents, elf_vax_plt0_entry, PLT_ENTRY_SIZE);
2077 bfd_put_32 (output_bfd,
2078 (sgot->output_section->vma
2079 + sgot->output_offset + 4
2080 - (splt->output_section->vma + 6)),
2081 splt->contents + 2);
2082 bfd_put_32 (output_bfd,
2083 (sgot->output_section->vma
2084 + sgot->output_offset + 8
2085 - (splt->output_section->vma + 12)),
2086 splt->contents + 8);
2087 elf_section_data (splt->output_section)->this_hdr.sh_entsize
2092 /* Fill in the first three entries in the global offset table. */
2096 bfd_put_32 (output_bfd, (bfd_vma) 0, sgot->contents);
2098 bfd_put_32 (output_bfd,
2099 sdyn->output_section->vma + sdyn->output_offset,
2101 bfd_put_32 (output_bfd, (bfd_vma) 0, sgot->contents + 4);
2102 bfd_put_32 (output_bfd, (bfd_vma) 0, sgot->contents + 8);
2105 elf_section_data (sgot->output_section)->this_hdr.sh_entsize = 4;
2110 #define TARGET_LITTLE_SYM bfd_elf32_vax_vec
2111 #define TARGET_LITTLE_NAME "elf32-vax"
2112 #define ELF_MACHINE_CODE EM_VAX
2113 #define ELF_MAXPAGESIZE 0x1000
2115 #define elf_backend_create_dynamic_sections \
2116 _bfd_elf_create_dynamic_sections
2117 #define bfd_elf32_bfd_link_hash_table_create \
2118 elf_vax_link_hash_table_create
2119 #define bfd_elf32_bfd_final_link bfd_elf_gc_common_final_link
2121 #define elf_backend_check_relocs elf_vax_check_relocs
2122 #define elf_backend_adjust_dynamic_symbol \
2123 elf_vax_adjust_dynamic_symbol
2124 #define elf_backend_size_dynamic_sections \
2125 elf_vax_size_dynamic_sections
2126 #define elf_backend_relocate_section elf_vax_relocate_section
2127 #define elf_backend_finish_dynamic_symbol \
2128 elf_vax_finish_dynamic_symbol
2129 #define elf_backend_finish_dynamic_sections \
2130 elf_vax_finish_dynamic_sections
2131 #define elf_backend_gc_mark_hook elf_vax_gc_mark_hook
2132 #define elf_backend_gc_sweep_hook elf_vax_gc_sweep_hook
2133 #define bfd_elf32_bfd_merge_private_bfd_data \
2134 elf32_vax_merge_private_bfd_data
2135 #define bfd_elf32_bfd_set_private_flags \
2136 elf32_vax_set_private_flags
2137 #define bfd_elf32_bfd_print_private_bfd_data \
2138 elf32_vax_print_private_bfd_data
2140 #define elf_backend_can_gc_sections 1
2141 #define elf_backend_want_got_plt 1
2142 #define elf_backend_plt_readonly 1
2143 #define elf_backend_want_plt_sym 0
2144 #define elf_backend_got_header_size 16
2145 #define elf_backend_rela_normal 1
2147 #include "elf32-target.h"