1 /* VAX series support for 32-bit ELF
2 Copyright 1993, 1995, 1996, 1997, 1998, 1999, 2000, 2001, 2002, 2003,
3 2004, 2005, 2006 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., 51 Franklin Street - Fifth Floor, Boston, MA 02110-1301, USA. */
29 static reloc_howto_type *reloc_type_lookup (bfd *, bfd_reloc_code_real_type);
30 static void rtype_to_howto (bfd *, arelent *, Elf_Internal_Rela *);
31 static struct bfd_hash_entry *elf_vax_link_hash_newfunc (struct bfd_hash_entry *,
32 struct bfd_hash_table *,
34 static struct bfd_link_hash_table *elf_vax_link_hash_table_create (bfd *);
35 static bfd_boolean elf_vax_check_relocs (bfd *, struct bfd_link_info *,
36 asection *, const Elf_Internal_Rela *);
37 static asection *elf_vax_gc_mark_hook (asection *, struct bfd_link_info *,
39 struct elf_link_hash_entry *,
41 static bfd_boolean elf_vax_gc_sweep_hook (bfd *, struct bfd_link_info *,
43 const Elf_Internal_Rela *);
44 static bfd_boolean elf_vax_adjust_dynamic_symbol (struct bfd_link_info *,
45 struct elf_link_hash_entry *);
46 static bfd_boolean elf_vax_size_dynamic_sections (bfd *, struct bfd_link_info *);
47 static bfd_boolean elf_vax_relocate_section (bfd *, struct bfd_link_info *,
48 bfd *, asection *, bfd_byte *,
50 Elf_Internal_Sym *, asection **);
51 static bfd_boolean elf_vax_finish_dynamic_symbol (bfd *, struct bfd_link_info *,
52 struct elf_link_hash_entry *,
54 static bfd_boolean elf_vax_finish_dynamic_sections (bfd *,
55 struct bfd_link_info *);
57 static bfd_boolean elf32_vax_set_private_flags (bfd *, flagword);
58 static bfd_boolean elf32_vax_merge_private_bfd_data (bfd *, bfd *);
59 static bfd_boolean elf32_vax_print_private_bfd_data (bfd *, PTR);
61 static reloc_howto_type howto_table[] = {
62 HOWTO (R_VAX_NONE, /* type */
64 0, /* size (0 = byte, 1 = short, 2 = long) */
66 FALSE, /* pc_relative */
68 complain_overflow_dont, /* complain_on_overflow */
69 bfd_elf_generic_reloc, /* special_function */
70 "R_VAX_NONE", /* name */
71 FALSE, /* partial_inplace */
73 0x00000000, /* dst_mask */
74 FALSE), /* pcrel_offset */
76 HOWTO (R_VAX_32, /* type */
78 2, /* size (0 = byte, 1 = short, 2 = long) */
80 FALSE, /* pc_relative */
82 complain_overflow_bitfield, /* complain_on_overflow */
83 bfd_elf_generic_reloc, /* special_function */
84 "R_VAX_32", /* name */
85 FALSE, /* partial_inplace */
87 0xffffffff, /* dst_mask */
88 FALSE), /* pcrel_offset */
90 HOWTO (R_VAX_16, /* type */
92 1, /* size (0 = byte, 1 = short, 2 = long) */
94 FALSE, /* pc_relative */
96 complain_overflow_bitfield, /* complain_on_overflow */
97 bfd_elf_generic_reloc, /* special_function */
98 "R_VAX_16", /* name */
99 FALSE, /* partial_inplace */
101 0x0000ffff, /* dst_mask */
102 FALSE), /* pcrel_offset */
104 HOWTO (R_VAX_8, /* type */
106 0, /* size (0 = byte, 1 = short, 2 = long) */
108 FALSE, /* pc_relative */
110 complain_overflow_bitfield, /* complain_on_overflow */
111 bfd_elf_generic_reloc, /* special_function */
112 "R_VAX_8", /* name */
113 FALSE, /* partial_inplace */
115 0x000000ff, /* dst_mask */
116 FALSE), /* pcrel_offset */
118 HOWTO (R_VAX_PC32, /* type */
120 2, /* size (0 = byte, 1 = short, 2 = long) */
122 TRUE, /* pc_relative */
124 complain_overflow_bitfield, /* complain_on_overflow */
125 bfd_elf_generic_reloc, /* special_function */
126 "R_VAX_PC32", /* name */
127 FALSE, /* partial_inplace */
129 0xffffffff, /* dst_mask */
130 TRUE), /* pcrel_offset */
132 HOWTO (R_VAX_PC16, /* type */
134 1, /* size (0 = byte, 1 = short, 2 = long) */
136 TRUE, /* pc_relative */
138 complain_overflow_signed, /* complain_on_overflow */
139 bfd_elf_generic_reloc, /* special_function */
140 "R_VAX_PC16", /* name */
141 FALSE, /* partial_inplace */
143 0x0000ffff, /* dst_mask */
144 TRUE), /* pcrel_offset */
146 HOWTO (R_VAX_PC8, /* type */
148 0, /* size (0 = byte, 1 = short, 2 = long) */
150 TRUE, /* pc_relative */
152 complain_overflow_signed, /* complain_on_overflow */
153 bfd_elf_generic_reloc, /* special_function */
154 "R_VAX_PC8", /* name */
155 FALSE, /* partial_inplace */
157 0x000000ff, /* dst_mask */
158 TRUE), /* pcrel_offset */
160 HOWTO (R_VAX_GOT32, /* type */
162 2, /* size (0 = byte, 1 = short, 2 = long) */
164 TRUE, /* pc_relative */
166 complain_overflow_bitfield, /* complain_on_overflow */
167 bfd_elf_generic_reloc, /* special_function */
168 "R_VAX_GOT32", /* name */
169 FALSE, /* partial_inplace */
171 0xffffffff, /* dst_mask */
172 TRUE), /* pcrel_offset */
180 HOWTO (R_VAX_PLT32, /* type */
182 2, /* size (0 = byte, 1 = short, 2 = long) */
184 TRUE, /* pc_relative */
186 complain_overflow_bitfield, /* complain_on_overflow */
187 bfd_elf_generic_reloc, /* special_function */
188 "R_VAX_PLT32", /* name */
189 FALSE, /* partial_inplace */
191 0xffffffff, /* dst_mask */
192 TRUE), /* pcrel_offset */
200 HOWTO (R_VAX_COPY, /* type */
202 0, /* size (0 = byte, 1 = short, 2 = long) */
204 FALSE, /* pc_relative */
206 complain_overflow_dont, /* complain_on_overflow */
207 bfd_elf_generic_reloc, /* special_function */
208 "R_VAX_COPY", /* name */
209 FALSE, /* partial_inplace */
211 0xffffffff, /* dst_mask */
212 FALSE), /* pcrel_offset */
214 HOWTO (R_VAX_GLOB_DAT, /* type */
216 2, /* size (0 = byte, 1 = short, 2 = long) */
218 FALSE, /* pc_relative */
220 complain_overflow_dont, /* complain_on_overflow */
221 bfd_elf_generic_reloc, /* special_function */
222 "R_VAX_GLOB_DAT", /* name */
223 FALSE, /* partial_inplace */
225 0xffffffff, /* dst_mask */
226 FALSE), /* pcrel_offset */
228 HOWTO (R_VAX_JMP_SLOT, /* type */
230 2, /* size (0 = byte, 1 = short, 2 = long) */
232 FALSE, /* pc_relative */
234 complain_overflow_dont, /* complain_on_overflow */
235 bfd_elf_generic_reloc, /* special_function */
236 "R_VAX_JMP_SLOT", /* name */
237 FALSE, /* partial_inplace */
239 0xffffffff, /* dst_mask */
240 FALSE), /* pcrel_offset */
242 HOWTO (R_VAX_RELATIVE, /* type */
244 2, /* size (0 = byte, 1 = short, 2 = long) */
246 FALSE, /* pc_relative */
248 complain_overflow_dont, /* complain_on_overflow */
249 bfd_elf_generic_reloc, /* special_function */
250 "R_VAX_RELATIVE", /* name */
251 FALSE, /* partial_inplace */
253 0xffffffff, /* dst_mask */
254 FALSE), /* pcrel_offset */
256 /* GNU extension to record C++ vtable hierarchy */
257 HOWTO (R_VAX_GNU_VTINHERIT, /* type */
259 2, /* size (0 = byte, 1 = short, 2 = long) */
261 FALSE, /* pc_relative */
263 complain_overflow_dont, /* complain_on_overflow */
264 NULL, /* special_function */
265 "R_VAX_GNU_VTINHERIT", /* name */
266 FALSE, /* partial_inplace */
269 FALSE), /* pcrel_offset */
271 /* GNU extension to record C++ vtable member usage */
272 HOWTO (R_VAX_GNU_VTENTRY, /* type */
274 2, /* size (0 = byte, 1 = short, 2 = long) */
276 FALSE, /* pc_relative */
278 complain_overflow_dont, /* complain_on_overflow */
279 _bfd_elf_rel_vtable_reloc_fn, /* special_function */
280 "R_VAX_GNU_VTENTRY", /* name */
281 FALSE, /* partial_inplace */
284 FALSE), /* pcrel_offset */
288 rtype_to_howto (bfd *abfd ATTRIBUTE_UNUSED, arelent *cache_ptr,
289 Elf_Internal_Rela *dst)
291 BFD_ASSERT (ELF32_R_TYPE(dst->r_info) < (unsigned int) R_VAX_max);
292 cache_ptr->howto = &howto_table[ELF32_R_TYPE(dst->r_info)];
295 #define elf_info_to_howto rtype_to_howto
299 bfd_reloc_code_real_type bfd_val;
302 { BFD_RELOC_NONE, R_VAX_NONE },
303 { BFD_RELOC_32, R_VAX_32 },
304 { BFD_RELOC_16, R_VAX_16 },
305 { BFD_RELOC_8, R_VAX_8 },
306 { BFD_RELOC_32_PCREL, R_VAX_PC32 },
307 { BFD_RELOC_16_PCREL, R_VAX_PC16 },
308 { BFD_RELOC_8_PCREL, R_VAX_PC8 },
309 { BFD_RELOC_32_GOT_PCREL, R_VAX_GOT32 },
310 { BFD_RELOC_32_PLT_PCREL, R_VAX_PLT32 },
311 { BFD_RELOC_NONE, R_VAX_COPY },
312 { BFD_RELOC_VAX_GLOB_DAT, R_VAX_GLOB_DAT },
313 { BFD_RELOC_VAX_JMP_SLOT, R_VAX_JMP_SLOT },
314 { BFD_RELOC_VAX_RELATIVE, R_VAX_RELATIVE },
315 { BFD_RELOC_CTOR, R_VAX_32 },
316 { BFD_RELOC_VTABLE_INHERIT, R_VAX_GNU_VTINHERIT },
317 { BFD_RELOC_VTABLE_ENTRY, R_VAX_GNU_VTENTRY },
320 static reloc_howto_type *
321 reloc_type_lookup (bfd *abfd ATTRIBUTE_UNUSED, bfd_reloc_code_real_type code)
324 for (i = 0; i < sizeof (reloc_map) / sizeof (reloc_map[0]); i++)
326 if (reloc_map[i].bfd_val == code)
327 return &howto_table[reloc_map[i].elf_val];
332 #define bfd_elf32_bfd_reloc_type_lookup reloc_type_lookup
333 #define ELF_ARCH bfd_arch_vax
334 /* end code generated by elf.el */
336 /* Functions for the VAX ELF linker. */
338 /* The name of the dynamic interpreter. This is put in the .interp
341 #define ELF_DYNAMIC_INTERPRETER "/usr/libexec/ld.elf_so"
343 /* The size in bytes of an entry in the procedure linkage table. */
345 #define PLT_ENTRY_SIZE 12
347 /* The first entry in a procedure linkage table looks like this. See
348 the SVR4 ABI VAX supplement to see how this works. */
350 static const bfd_byte elf_vax_plt0_entry[PLT_ENTRY_SIZE] =
352 0xdd, 0xef, /* pushl l^ */
353 0, 0, 0, 0, /* offset to .plt.got + 4 */
354 0x17, 0xff, /* jmp @L^(pc) */
355 0, 0, 0, 0, /* offset to .plt.got + 8 */
358 /* Subsequent entries in a procedure linkage table look like this. */
360 static const bfd_byte elf_vax_plt_entry[PLT_ENTRY_SIZE] =
362 0x40, 0x00, /* .word ^M<r6> */
363 0x16, 0xef, /* jsb L^(pc) */
364 0, 0, 0, 0, /* replaced with offset to start of .plt */
365 0, 0, 0, 0, /* index into .rela.plt */
368 /* The VAX linker needs to keep track of the number of relocs that it
369 decides to copy in check_relocs for each symbol. This is so that it
370 can discard PC relative relocs if it doesn't need them when linking
371 with -Bsymbolic. We store the information in a field extending the
372 regular ELF linker hash table. */
374 /* This structure keeps track of the number of PC relative relocs we have
375 copied for a given symbol. */
377 struct elf_vax_pcrel_relocs_copied
380 struct elf_vax_pcrel_relocs_copied *next;
381 /* A section in dynobj. */
383 /* Number of relocs copied in this section. */
387 /* VAX ELF linker hash entry. */
389 struct elf_vax_link_hash_entry
391 struct elf_link_hash_entry root;
393 /* Number of PC relative relocs copied for this symbol. */
394 struct elf_vax_pcrel_relocs_copied *pcrel_relocs_copied;
399 /* VAX ELF linker hash table. */
401 struct elf_vax_link_hash_table
403 struct elf_link_hash_table root;
406 /* Declare this now that the above structures are defined. */
408 static bfd_boolean elf_vax_discard_copies (struct elf_vax_link_hash_entry *,
411 /* Declare this now that the above structures are defined. */
413 static bfd_boolean elf_vax_instantiate_got_entries (struct elf_link_hash_entry *,
416 /* Traverse an VAX ELF linker hash table. */
418 #define elf_vax_link_hash_traverse(table, func, info) \
419 (elf_link_hash_traverse \
421 (bfd_boolean (*) (struct elf_link_hash_entry *, PTR)) (func), \
424 /* Get the VAX ELF linker hash table from a link_info structure. */
426 #define elf_vax_hash_table(p) ((struct elf_vax_link_hash_table *) (p)->hash)
428 /* Create an entry in an VAX ELF linker hash table. */
430 static struct bfd_hash_entry *
431 elf_vax_link_hash_newfunc (struct bfd_hash_entry *entry,
432 struct bfd_hash_table *table,
435 struct elf_vax_link_hash_entry *ret =
436 (struct elf_vax_link_hash_entry *) entry;
438 /* Allocate the structure if it has not already been allocated by a
441 ret = ((struct elf_vax_link_hash_entry *)
442 bfd_hash_allocate (table,
443 sizeof (struct elf_vax_link_hash_entry)));
445 return (struct bfd_hash_entry *) ret;
447 /* Call the allocation method of the superclass. */
448 ret = ((struct elf_vax_link_hash_entry *)
449 _bfd_elf_link_hash_newfunc ((struct bfd_hash_entry *) ret,
453 ret->pcrel_relocs_copied = NULL;
456 return (struct bfd_hash_entry *) ret;
459 /* Create an VAX ELF linker hash table. */
461 static struct bfd_link_hash_table *
462 elf_vax_link_hash_table_create (bfd *abfd)
464 struct elf_vax_link_hash_table *ret;
465 bfd_size_type amt = sizeof (struct elf_vax_link_hash_table);
467 ret = bfd_malloc (amt);
471 if (!_bfd_elf_link_hash_table_init (&ret->root, abfd,
472 elf_vax_link_hash_newfunc,
473 sizeof (struct elf_vax_link_hash_entry)))
479 return &ret->root.root;
482 /* Keep vax-specific flags in the ELF header */
484 elf32_vax_set_private_flags (bfd *abfd, flagword flags)
486 elf_elfheader (abfd)->e_flags = flags;
487 elf_flags_init (abfd) = TRUE;
491 /* Merge backend specific data from an object file to the output
492 object file when linking. */
494 elf32_vax_merge_private_bfd_data (bfd *ibfd, bfd *obfd)
499 if ( bfd_get_flavour (ibfd) != bfd_target_elf_flavour
500 || bfd_get_flavour (obfd) != bfd_target_elf_flavour)
503 in_flags = elf_elfheader (ibfd)->e_flags;
504 out_flags = elf_elfheader (obfd)->e_flags;
506 if (!elf_flags_init (obfd))
508 elf_flags_init (obfd) = TRUE;
509 elf_elfheader (obfd)->e_flags = in_flags;
515 /* Display the flags field */
517 elf32_vax_print_private_bfd_data (bfd *abfd, PTR ptr)
519 FILE *file = (FILE *) ptr;
521 BFD_ASSERT (abfd != NULL && ptr != NULL);
523 /* Print normal ELF private data. */
524 _bfd_elf_print_private_bfd_data (abfd, ptr);
526 /* Ignore init flag - it may not be set, despite the flags field containing valid data. */
528 /* xgettext:c-format */
529 fprintf (file, _("private flags = %lx:"), elf_elfheader (abfd)->e_flags);
531 if (elf_elfheader (abfd)->e_flags & EF_VAX_NONPIC)
532 fprintf (file, _(" [nonpic]"));
534 if (elf_elfheader (abfd)->e_flags & EF_VAX_DFLOAT)
535 fprintf (file, _(" [d-float]"));
537 if (elf_elfheader (abfd)->e_flags & EF_VAX_GFLOAT)
538 fprintf (file, _(" [g-float]"));
544 /* Look through the relocs for a section during the first phase, and
545 allocate space in the global offset table or procedure linkage
549 elf_vax_check_relocs (bfd *abfd, struct bfd_link_info *info, asection *sec,
550 const Elf_Internal_Rela *relocs)
553 Elf_Internal_Shdr *symtab_hdr;
554 struct elf_link_hash_entry **sym_hashes;
555 const Elf_Internal_Rela *rel;
556 const Elf_Internal_Rela *rel_end;
561 if (info->relocatable)
564 dynobj = elf_hash_table (info)->dynobj;
565 symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
566 sym_hashes = elf_sym_hashes (abfd);
572 rel_end = relocs + sec->reloc_count;
573 for (rel = relocs; rel < rel_end; rel++)
575 unsigned long r_symndx;
576 struct elf_link_hash_entry *h;
578 r_symndx = ELF32_R_SYM (rel->r_info);
580 if (r_symndx < symtab_hdr->sh_info)
584 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
585 while (h->root.type == bfd_link_hash_indirect
586 || h->root.type == bfd_link_hash_warning)
587 h = (struct elf_link_hash_entry *) h->root.u.i.link;
590 switch (ELF32_R_TYPE (rel->r_info))
594 && strcmp (h->root.root.string, "_GLOBAL_OFFSET_TABLE_") == 0)
597 /* This symbol requires a global offset table entry. */
601 /* Create the .got section. */
602 elf_hash_table (info)->dynobj = dynobj = abfd;
603 if (!_bfd_elf_create_got_section (dynobj, info))
609 sgot = bfd_get_section_by_name (dynobj, ".got");
610 BFD_ASSERT (sgot != NULL);
614 && (h != NULL || info->shared))
616 srelgot = bfd_get_section_by_name (dynobj, ".rela.got");
619 srelgot = bfd_make_section_with_flags (dynobj,
628 || !bfd_set_section_alignment (dynobj, srelgot, 2))
635 struct elf_vax_link_hash_entry *eh;
637 eh = (struct elf_vax_link_hash_entry *) h;
638 if (h->got.refcount == -1)
641 eh->got_addend = rel->r_addend;
646 if (eh->got_addend != (bfd_vma) rel->r_addend)
647 (*_bfd_error_handler)
648 (_("%s: warning: GOT addend of %ld to `%s' does not match previous GOT addend of %ld"),
649 bfd_get_filename (abfd), rel->r_addend,
658 /* This symbol requires a procedure linkage table entry. We
659 actually build the entry in adjust_dynamic_symbol,
660 because this might be a case of linking PIC code which is
661 never referenced by a dynamic object, in which case we
662 don't need to generate a procedure linkage table entry
665 /* If this is a local symbol, we resolve it directly without
666 creating a procedure linkage table entry. */
671 if (h->plt.refcount == -1)
680 /* If we are creating a shared library and this is not a local
681 symbol, we need to copy the reloc into the shared library.
682 However when linking with -Bsymbolic and this is a global
683 symbol which is defined in an object we are including in the
684 link (i.e., DEF_REGULAR is set), then we can resolve the
685 reloc directly. At this point we have not seen all the input
686 files, so it is possible that DEF_REGULAR is not set now but
687 will be set later (it is never cleared). We account for that
688 possibility below by storing information in the
689 pcrel_relocs_copied field of the hash table entry. */
691 && (sec->flags & SEC_ALLOC) != 0
694 || !h->def_regular)))
698 /* Make sure a plt entry is created for this symbol if
699 it turns out to be a function defined by a dynamic
701 if (h->plt.refcount == -1)
714 /* Make sure a plt entry is created for this symbol if it
715 turns out to be a function defined by a dynamic object. */
716 if (h->plt.refcount == -1)
722 /* If we are creating a shared library, we need to copy the
723 reloc into the shared library. */
725 && (sec->flags & SEC_ALLOC) != 0)
727 /* When creating a shared object, we must copy these
728 reloc types into the output file. We create a reloc
729 section in dynobj and make room for this reloc. */
734 name = (bfd_elf_string_from_elf_section
736 elf_elfheader (abfd)->e_shstrndx,
737 elf_section_data (sec)->rel_hdr.sh_name));
741 BFD_ASSERT (strncmp (name, ".rela", 5) == 0
742 && strcmp (bfd_get_section_name (abfd, sec),
745 sreloc = bfd_get_section_by_name (dynobj, name);
748 sreloc = bfd_make_section_with_flags (dynobj,
757 || !bfd_set_section_alignment (dynobj, sreloc, 2))
760 if (sec->flags & SEC_READONLY)
761 info->flags |= DF_TEXTREL;
764 sreloc->size += sizeof (Elf32_External_Rela);
766 /* If we are linking with -Bsymbolic, we count the number of
767 PC relative relocations we have entered for this symbol,
768 so that we can discard them again if the symbol is later
769 defined by a regular object. Note that this function is
770 only called if we are using a vaxelf linker hash table,
771 which means that h is really a pointer to an
772 elf_vax_link_hash_entry. */
773 if ((ELF32_R_TYPE (rel->r_info) == R_VAX_PC8
774 || ELF32_R_TYPE (rel->r_info) == R_VAX_PC16
775 || ELF32_R_TYPE (rel->r_info) == R_VAX_PC32)
778 struct elf_vax_link_hash_entry *eh;
779 struct elf_vax_pcrel_relocs_copied *p;
781 eh = (struct elf_vax_link_hash_entry *) h;
783 for (p = eh->pcrel_relocs_copied; p != NULL; p = p->next)
784 if (p->section == sreloc)
789 p = ((struct elf_vax_pcrel_relocs_copied *)
790 bfd_alloc (dynobj, (bfd_size_type) sizeof *p));
793 p->next = eh->pcrel_relocs_copied;
794 eh->pcrel_relocs_copied = p;
805 /* This relocation describes the C++ object vtable hierarchy.
806 Reconstruct it for later use during GC. */
807 case R_VAX_GNU_VTINHERIT:
808 if (!bfd_elf_gc_record_vtinherit (abfd, sec, h, rel->r_offset))
812 /* This relocation describes which C++ vtable entries are actually
813 used. Record for later use during GC. */
814 case R_VAX_GNU_VTENTRY:
815 if (!bfd_elf_gc_record_vtentry (abfd, sec, h, rel->r_addend))
827 /* Return the section that should be marked against GC for a given
831 elf_vax_gc_mark_hook (asection *sec,
832 struct bfd_link_info *info ATTRIBUTE_UNUSED,
833 Elf_Internal_Rela *rel,
834 struct elf_link_hash_entry *h,
835 Elf_Internal_Sym *sym)
839 switch (ELF32_R_TYPE (rel->r_info))
841 case R_VAX_GNU_VTINHERIT:
842 case R_VAX_GNU_VTENTRY:
846 switch (h->root.type)
851 case bfd_link_hash_defined:
852 case bfd_link_hash_defweak:
853 return h->root.u.def.section;
855 case bfd_link_hash_common:
856 return h->root.u.c.p->section;
861 return bfd_section_from_elf_index (sec->owner, sym->st_shndx);
866 /* Update the got entry reference counts for the section being removed. */
869 elf_vax_gc_sweep_hook (bfd *abfd, struct bfd_link_info *info, asection *sec,
870 const Elf_Internal_Rela *relocs)
872 Elf_Internal_Shdr *symtab_hdr;
873 struct elf_link_hash_entry **sym_hashes;
874 const Elf_Internal_Rela *rel, *relend;
877 dynobj = elf_hash_table (info)->dynobj;
881 symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
882 sym_hashes = elf_sym_hashes (abfd);
884 relend = relocs + sec->reloc_count;
885 for (rel = relocs; rel < relend; rel++)
887 unsigned long r_symndx;
888 struct elf_link_hash_entry *h = NULL;
890 r_symndx = ELF32_R_SYM (rel->r_info);
891 if (r_symndx >= symtab_hdr->sh_info)
893 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
894 while (h->root.type == bfd_link_hash_indirect
895 || h->root.type == bfd_link_hash_warning)
896 h = (struct elf_link_hash_entry *) h->root.u.i.link;
899 switch (ELF32_R_TYPE (rel->r_info))
902 if (h != NULL && h->got.refcount > 0)
913 if (h != NULL && h->plt.refcount > 0)
925 /* Adjust a symbol defined by a dynamic object and referenced by a
926 regular object. The current definition is in some section of the
927 dynamic object, but we're not including those sections. We have to
928 change the definition to something the rest of the link can
932 elf_vax_adjust_dynamic_symbol (info, h)
933 struct bfd_link_info *info;
934 struct elf_link_hash_entry *h;
938 unsigned int power_of_two;
940 dynobj = elf_hash_table (info)->dynobj;
942 /* Make sure we know what is going on here. */
943 BFD_ASSERT (dynobj != NULL
945 || h->u.weakdef != NULL
948 && !h->def_regular)));
950 /* If this is a function, put it in the procedure linkage table. We
951 will fill in the contents of the procedure linkage table later,
952 when we know the address of the .got section. */
953 if (h->type == STT_FUNC
959 /* We must always create the plt entry if it was referenced
960 by a PLTxxO relocation. In this case we already recorded
961 it as a dynamic symbol. */
964 /* This case can occur if we saw a PLTxx reloc in an input
965 file, but the symbol was never referred to by a dynamic
966 object. In such a case, we don't actually need to build
967 a procedure linkage table, and we can just do a PCxx
969 BFD_ASSERT (h->needs_plt);
970 h->plt.offset = (bfd_vma) -1;
974 /* GC may have rendered this entry unused. */
975 if (h->plt.refcount <= 0)
978 h->plt.offset = (bfd_vma) -1;
982 /* Make sure this symbol is output as a dynamic symbol. */
983 if (h->dynindx == -1)
985 if (! bfd_elf_link_record_dynamic_symbol (info, h))
989 s = bfd_get_section_by_name (dynobj, ".plt");
990 BFD_ASSERT (s != NULL);
992 /* If this is the first .plt entry, make room for the special
996 s->size += PLT_ENTRY_SIZE;
999 /* If this symbol is not defined in a regular file, and we are
1000 not generating a shared library, then set the symbol to this
1001 location in the .plt. This is required to make function
1002 pointers compare as equal between the normal executable and
1003 the shared library. */
1007 h->root.u.def.section = s;
1008 h->root.u.def.value = s->size;
1011 h->plt.offset = s->size;
1013 /* Make room for this entry. */
1014 s->size += PLT_ENTRY_SIZE;
1016 /* We also need to make an entry in the .got.plt section, which
1017 will be placed in the .got section by the linker script. */
1019 s = bfd_get_section_by_name (dynobj, ".got.plt");
1020 BFD_ASSERT (s != NULL);
1023 /* We also need to make an entry in the .rela.plt section. */
1025 s = bfd_get_section_by_name (dynobj, ".rela.plt");
1026 BFD_ASSERT (s != NULL);
1027 s->size += sizeof (Elf32_External_Rela);
1032 /* Reinitialize the plt offset now that it is not used as a reference
1034 h->plt.offset = (bfd_vma) -1;
1036 /* If this is a weak symbol, and there is a real definition, the
1037 processor independent code will have arranged for us to see the
1038 real definition first, and we can just use the same value. */
1039 if (h->u.weakdef != NULL)
1041 BFD_ASSERT (h->u.weakdef->root.type == bfd_link_hash_defined
1042 || h->u.weakdef->root.type == bfd_link_hash_defweak);
1043 h->root.u.def.section = h->u.weakdef->root.u.def.section;
1044 h->root.u.def.value = h->u.weakdef->root.u.def.value;
1048 /* This is a reference to a symbol defined by a dynamic object which
1049 is not a function. */
1051 /* If we are creating a shared library, we must presume that the
1052 only references to the symbol are via the global offset table.
1053 For such cases we need not do anything here; the relocations will
1054 be handled correctly by relocate_section. */
1060 (*_bfd_error_handler) (_("dynamic variable `%s' is zero size"),
1061 h->root.root.string);
1065 /* We must allocate the symbol in our .dynbss section, which will
1066 become part of the .bss section of the executable. There will be
1067 an entry for this symbol in the .dynsym section. The dynamic
1068 object will contain position independent code, so all references
1069 from the dynamic object to this symbol will go through the global
1070 offset table. The dynamic linker will use the .dynsym entry to
1071 determine the address it must put in the global offset table, so
1072 both the dynamic object and the regular object will refer to the
1073 same memory location for the variable. */
1075 s = bfd_get_section_by_name (dynobj, ".dynbss");
1076 BFD_ASSERT (s != NULL);
1078 /* We must generate a R_VAX_COPY reloc to tell the dynamic linker to
1079 copy the initial value out of the dynamic object and into the
1080 runtime process image. We need to remember the offset into the
1081 .rela.bss section we are going to use. */
1082 if ((h->root.u.def.section->flags & SEC_ALLOC) != 0)
1086 srel = bfd_get_section_by_name (dynobj, ".rela.bss");
1087 BFD_ASSERT (srel != NULL);
1088 srel->size += sizeof (Elf32_External_Rela);
1092 /* We need to figure out the alignment required for this symbol. I
1093 have no idea how ELF linkers handle this. */
1094 power_of_two = bfd_log2 (h->size);
1095 if (power_of_two > 3)
1098 /* Apply the required alignment. */
1099 s->size = BFD_ALIGN (s->size, (bfd_size_type) (1 << power_of_two));
1100 if (power_of_two > bfd_get_section_alignment (dynobj, s))
1102 if (!bfd_set_section_alignment (dynobj, s, power_of_two))
1106 /* Define the symbol as being at this point in the section. */
1107 h->root.u.def.section = s;
1108 h->root.u.def.value = s->size;
1110 /* Increment the section size to make room for the symbol. */
1116 /* Set the sizes of the dynamic sections. */
1119 elf_vax_size_dynamic_sections (bfd *output_bfd, struct bfd_link_info *info)
1125 bfd_boolean reltext;
1127 dynobj = elf_hash_table (info)->dynobj;
1128 BFD_ASSERT (dynobj != NULL);
1130 if (elf_hash_table (info)->dynamic_sections_created)
1132 /* Set the contents of the .interp section to the interpreter. */
1133 if (info->executable)
1135 s = bfd_get_section_by_name (dynobj, ".interp");
1136 BFD_ASSERT (s != NULL);
1137 s->size = sizeof ELF_DYNAMIC_INTERPRETER;
1138 s->contents = (unsigned char *) ELF_DYNAMIC_INTERPRETER;
1143 /* We may have created entries in the .rela.got and .got sections.
1144 However, if we are not creating the dynamic sections, we will
1145 not actually use these entries. Reset the size of .rela.got
1146 and .got, which will cause it to get stripped from the output
1148 s = bfd_get_section_by_name (dynobj, ".rela.got");
1151 s = bfd_get_section_by_name (dynobj, ".got.plt");
1154 s = bfd_get_section_by_name (dynobj, ".got");
1159 /* If this is a -Bsymbolic shared link, then we need to discard all PC
1160 relative relocs against symbols defined in a regular object. We
1161 allocated space for them in the check_relocs routine, but we will not
1162 fill them in in the relocate_section routine. */
1163 if (info->shared && info->symbolic)
1164 elf_vax_link_hash_traverse (elf_vax_hash_table (info),
1165 elf_vax_discard_copies,
1168 /* If this is a -Bsymbolic shared link or a static link, we need to
1169 discard all the got entries we've recorded. Otherwise, we need to
1170 instantiate (allocate space for them). */
1171 elf_link_hash_traverse (elf_hash_table (info),
1172 elf_vax_instantiate_got_entries,
1175 /* The check_relocs and adjust_dynamic_symbol entry points have
1176 determined the sizes of the various dynamic sections. Allocate
1181 for (s = dynobj->sections; s != NULL; s = s->next)
1185 if ((s->flags & SEC_LINKER_CREATED) == 0)
1188 /* It's OK to base decisions on the section name, because none
1189 of the dynobj section names depend upon the input files. */
1190 name = bfd_get_section_name (dynobj, s);
1192 if (strcmp (name, ".plt") == 0)
1194 /* Remember whether there is a PLT. */
1197 else if (strncmp (name, ".rela", 5) == 0)
1203 /* Remember whether there are any reloc sections other
1205 if (strcmp (name, ".rela.plt") != 0)
1207 const char *outname;
1211 /* If this relocation section applies to a read only
1212 section, then we probably need a DT_TEXTREL
1213 entry. .rela.plt is actually associated with
1214 .got.plt, which is never readonly. */
1215 outname = bfd_get_section_name (output_bfd,
1217 target = bfd_get_section_by_name (output_bfd, outname + 5);
1219 && (target->flags & SEC_READONLY) != 0
1220 && (target->flags & SEC_ALLOC) != 0)
1224 /* We use the reloc_count field as a counter if we need
1225 to copy relocs into the output file. */
1229 else if (strncmp (name, ".got", 4) != 0
1230 && strcmp (name, ".dynbss") != 0)
1232 /* It's not one of our sections, so don't allocate space. */
1238 /* If we don't need this section, strip it from the
1239 output file. This is mostly to handle .rela.bss and
1240 .rela.plt. We must create both sections in
1241 create_dynamic_sections, because they must be created
1242 before the linker maps input sections to output
1243 sections. The linker does that before
1244 adjust_dynamic_symbol is called, and it is that
1245 function which decides whether anything needs to go
1246 into these sections. */
1247 s->flags |= SEC_EXCLUDE;
1251 if ((s->flags & SEC_HAS_CONTENTS) == 0)
1254 /* Allocate memory for the section contents. */
1255 s->contents = (bfd_byte *) bfd_alloc (dynobj, s->size);
1256 if (s->contents == NULL)
1260 if (elf_hash_table (info)->dynamic_sections_created)
1262 /* Add some entries to the .dynamic section. We fill in the
1263 values later, in elf_vax_finish_dynamic_sections, but we
1264 must add the entries now so that we get the correct size for
1265 the .dynamic section. The DT_DEBUG entry is filled in by the
1266 dynamic linker and used by the debugger. */
1267 #define add_dynamic_entry(TAG, VAL) \
1268 _bfd_elf_add_dynamic_entry (info, TAG, VAL)
1272 if (!add_dynamic_entry (DT_DEBUG, 0))
1278 if (!add_dynamic_entry (DT_PLTGOT, 0)
1279 || !add_dynamic_entry (DT_PLTRELSZ, 0)
1280 || !add_dynamic_entry (DT_PLTREL, DT_RELA)
1281 || !add_dynamic_entry (DT_JMPREL, 0))
1287 if (!add_dynamic_entry (DT_RELA, 0)
1288 || !add_dynamic_entry (DT_RELASZ, 0)
1289 || !add_dynamic_entry (DT_RELAENT, sizeof (Elf32_External_Rela)))
1293 if (reltext || (info->flags & DF_TEXTREL) != 0)
1295 if (!add_dynamic_entry (DT_TEXTREL, 0))
1299 #undef add_dynamic_entry
1304 /* This function is called via elf_vax_link_hash_traverse if we are
1305 creating a shared object with -Bsymbolic. It discards the space
1306 allocated to copy PC relative relocs against symbols which are defined
1307 in regular objects. We allocated space for them in the check_relocs
1308 routine, but we won't fill them in in the relocate_section routine. */
1311 elf_vax_discard_copies (struct elf_vax_link_hash_entry *h,
1312 PTR ignore ATTRIBUTE_UNUSED)
1314 struct elf_vax_pcrel_relocs_copied *s;
1316 if (h->root.root.type == bfd_link_hash_warning)
1317 h = (struct elf_vax_link_hash_entry *) h->root.root.u.i.link;
1319 /* We only discard relocs for symbols defined in a regular object. */
1320 if (!h->root.def_regular)
1323 for (s = h->pcrel_relocs_copied; s != NULL; s = s->next)
1324 s->section->size -= s->count * sizeof (Elf32_External_Rela);
1329 /* This function is called via elf_link_hash_traverse. It looks for entries
1330 that have GOT or PLT (.GOT) references. If creating a static object or a
1331 shared object with -Bsymbolic, it resets the reference count back to 0
1332 and sets the offset to -1 so normal PC32 relocation will be done. If
1333 creating a shared object or executable, space in the .got and .rela.got
1334 will be reserved for the symbol. */
1337 elf_vax_instantiate_got_entries (struct elf_link_hash_entry *h, PTR infoptr)
1339 struct bfd_link_info *info = (struct bfd_link_info *) infoptr;
1344 /* We don't care about non-GOT (and non-PLT) entries. */
1345 if (h->got.refcount <= 0 && h->plt.refcount <= 0)
1348 dynobj = elf_hash_table (info)->dynobj;
1352 sgot = bfd_get_section_by_name (dynobj, ".got");
1353 srelgot = bfd_get_section_by_name (dynobj, ".rela.got");
1355 if (!elf_hash_table (info)->dynamic_sections_created
1356 || (info->shared && info->symbolic))
1358 h->got.refcount = 0;
1359 h->got.offset = (bfd_vma) -1;
1360 h->plt.refcount = 0;
1361 h->plt.offset = (bfd_vma) -1;
1363 else if (h->got.refcount > 0)
1365 /* Make sure this symbol is output as a dynamic symbol. */
1366 if (h->dynindx == -1)
1368 if (!bfd_elf_link_record_dynamic_symbol (info, h))
1372 /* Allocate space in the .got and .rela.got sections. */
1374 srelgot->size += sizeof (Elf32_External_Rela);
1380 /* Relocate an VAX ELF section. */
1383 elf_vax_relocate_section (bfd *output_bfd,
1384 struct bfd_link_info *info,
1386 asection *input_section,
1388 Elf_Internal_Rela *relocs,
1389 Elf_Internal_Sym *local_syms,
1390 asection **local_sections)
1393 Elf_Internal_Shdr *symtab_hdr;
1394 struct elf_link_hash_entry **sym_hashes;
1395 bfd_vma *local_got_offsets;
1402 Elf_Internal_Rela *rel;
1403 Elf_Internal_Rela *relend;
1405 if (info->relocatable)
1408 dynobj = elf_hash_table (info)->dynobj;
1409 symtab_hdr = &elf_tdata (input_bfd)->symtab_hdr;
1410 sym_hashes = elf_sym_hashes (input_bfd);
1411 local_got_offsets = elf_local_got_offsets (input_bfd);
1419 relend = relocs + input_section->reloc_count;
1420 for (; rel < relend; rel++)
1423 reloc_howto_type *howto;
1424 unsigned long r_symndx;
1425 struct elf_link_hash_entry *h;
1426 Elf_Internal_Sym *sym;
1429 bfd_reloc_status_type r;
1431 r_type = ELF32_R_TYPE (rel->r_info);
1432 if (r_type < 0 || r_type >= (int) R_VAX_max)
1434 bfd_set_error (bfd_error_bad_value);
1437 howto = howto_table + r_type;
1439 /* This is a final link. */
1440 r_symndx = ELF32_R_SYM (rel->r_info);
1444 if (r_symndx < symtab_hdr->sh_info)
1446 sym = local_syms + r_symndx;
1447 sec = local_sections[r_symndx];
1448 relocation = _bfd_elf_rela_local_sym (output_bfd, sym, &sec, rel);
1452 bfd_boolean unresolved_reloc;
1455 RELOC_FOR_GLOBAL_SYMBOL (info, input_bfd, input_section, rel,
1456 r_symndx, symtab_hdr, sym_hashes,
1458 unresolved_reloc, warned);
1460 if ((h->root.type == bfd_link_hash_defined
1461 || h->root.type == bfd_link_hash_defweak)
1462 && ((r_type == R_VAX_PLT32
1463 && h->plt.offset != (bfd_vma) -1
1464 && elf_hash_table (info)->dynamic_sections_created)
1465 || (r_type == R_VAX_GOT32
1466 && strcmp (h->root.root.string,
1467 "_GLOBAL_OFFSET_TABLE_") != 0
1468 && elf_hash_table (info)->dynamic_sections_created
1470 || (! info->symbolic && h->dynindx != -1)
1471 || !h->def_regular))
1473 && ((! info->symbolic && h->dynindx != -1)
1475 && ((input_section->flags & SEC_ALLOC) != 0
1476 /* DWARF will emit R_VAX_32 relocations in its
1477 sections against symbols defined externally
1478 in shared libraries. We can't do anything
1481 || ((input_section->flags & SEC_DEBUGGING) != 0
1483 && (r_type == R_VAX_8
1484 || r_type == R_VAX_16
1485 || r_type == R_VAX_32
1486 || r_type == R_VAX_PC8
1487 || r_type == R_VAX_PC16
1488 || r_type == R_VAX_PC32))))
1489 /* In these cases, we don't need the relocation
1490 value. We check specially because in some
1491 obscure cases sec->output_section will be NULL. */
1498 /* Relocation is to the address of the entry for this symbol
1499 in the global offset table. */
1500 if (h == NULL || h->got.offset == (bfd_vma) -1)
1503 /* Relocation is the offset of the entry for this symbol in
1504 the global offset table. */
1511 sgot = bfd_get_section_by_name (dynobj, ".got");
1512 BFD_ASSERT (sgot != NULL);
1515 BFD_ASSERT (h != NULL);
1516 off = h->got.offset;
1517 BFD_ASSERT (off != (bfd_vma) -1);
1518 BFD_ASSERT (off < sgot->size);
1524 /* The symbol was forced to be local
1525 because of a version file.. We must initialize
1526 this entry in the global offset table. Since
1527 the offset must always be a multiple of 4, we
1528 use the least significant bit to record whether
1529 we have initialized it already.
1531 When doing a dynamic link, we create a .rela.got
1532 relocation entry to initialize the value. This
1533 is done in the finish_dynamic_symbol routine. */
1538 bfd_put_32 (output_bfd, relocation + rel->r_addend,
1539 sgot->contents + off);
1543 bfd_put_32 (output_bfd, rel->r_addend, sgot->contents + off);
1546 relocation = sgot->output_offset + off;
1547 /* The GOT relocation uses the addend. */
1550 /* Change the reference to be indirect. */
1551 contents[rel->r_offset - 1] |= 0x10;
1552 relocation += sgot->output_section->vma;
1557 /* Relocation is to the entry for this symbol in the
1558 procedure linkage table. */
1560 /* Resolve a PLTxx reloc against a local symbol directly,
1561 without using the procedure linkage table. */
1565 if (h->plt.offset == (bfd_vma) -1
1566 || !elf_hash_table (info)->dynamic_sections_created)
1568 /* We didn't make a PLT entry for this symbol. This
1569 happens when statically linking PIC code, or when
1570 using -Bsymbolic. */
1576 splt = bfd_get_section_by_name (dynobj, ".plt");
1577 BFD_ASSERT (splt != NULL);
1580 if (sgotplt == NULL)
1582 sgotplt = bfd_get_section_by_name (dynobj, ".got.plt");
1583 BFD_ASSERT (splt != NULL);
1586 plt_index = h->plt.offset / PLT_ENTRY_SIZE - 1;
1588 /* Get the offset into the .got table of the entry that
1589 corresponds to this function. Each .got entry is 4 bytes.
1590 The first two are reserved. */
1591 got_offset = (plt_index + 3) * 4;
1593 /* We want the relocate to point into the .got.plt instead
1594 of the plt itself. */
1595 relocation = (sgotplt->output_section->vma
1596 + sgotplt->output_offset
1598 contents[rel->r_offset-1] |= 0x10; /* make indirect */
1599 if (rel->r_addend == 2)
1603 else if (rel->r_addend != 0)
1604 (*_bfd_error_handler)
1605 (_("%s: warning: PLT addend of %d to `%s' from %s section ignored"),
1606 bfd_get_filename (input_bfd), rel->r_addend,
1607 h->root.root.string,
1608 bfd_get_section_name (input_bfd, input_section));
1624 && (input_section->flags & SEC_ALLOC) != 0
1625 && ((r_type != R_VAX_PC8
1626 && r_type != R_VAX_PC16
1627 && r_type != R_VAX_PC32)
1629 || !h->def_regular)))
1631 Elf_Internal_Rela outrel;
1633 bfd_boolean skip, relocate;
1635 /* When generating a shared object, these relocations
1636 are copied into the output file to be resolved at run
1642 name = (bfd_elf_string_from_elf_section
1644 elf_elfheader (input_bfd)->e_shstrndx,
1645 elf_section_data (input_section)->rel_hdr.sh_name));
1649 BFD_ASSERT (strncmp (name, ".rela", 5) == 0
1650 && strcmp (bfd_get_section_name (input_bfd,
1654 sreloc = bfd_get_section_by_name (dynobj, name);
1655 BFD_ASSERT (sreloc != NULL);
1662 _bfd_elf_section_offset (output_bfd, info, input_section,
1664 if (outrel.r_offset == (bfd_vma) -1)
1666 if (outrel.r_offset == (bfd_vma) -2)
1667 skip = TRUE, relocate = TRUE;
1668 outrel.r_offset += (input_section->output_section->vma
1669 + input_section->output_offset);
1672 memset (&outrel, 0, sizeof outrel);
1673 /* h->dynindx may be -1 if the symbol was marked to
1676 && ((! info->symbolic && h->dynindx != -1)
1677 || !h->def_regular))
1679 BFD_ASSERT (h->dynindx != -1);
1680 outrel.r_info = ELF32_R_INFO (h->dynindx, r_type);
1681 outrel.r_addend = relocation + rel->r_addend;
1685 if (r_type == R_VAX_32)
1688 outrel.r_info = ELF32_R_INFO (0, R_VAX_RELATIVE);
1689 BFD_ASSERT (bfd_get_signed_32 (input_bfd,
1690 &contents[rel->r_offset]) == 0);
1691 outrel.r_addend = relocation + rel->r_addend;
1697 if (bfd_is_abs_section (sec))
1699 else if (sec == NULL || sec->owner == NULL)
1701 bfd_set_error (bfd_error_bad_value);
1708 osec = sec->output_section;
1709 indx = elf_section_data (osec)->dynindx;
1710 BFD_ASSERT (indx > 0);
1713 outrel.r_info = ELF32_R_INFO (indx, r_type);
1714 outrel.r_addend = relocation + rel->r_addend;
1718 if (!strcmp (bfd_get_section_name (input_bfd, input_section),
1721 && ELF32_R_TYPE(outrel.r_info) != R_VAX_32
1722 && ELF32_R_TYPE(outrel.r_info) != R_VAX_RELATIVE
1723 && ELF32_R_TYPE(outrel.r_info) != R_VAX_COPY
1724 && ELF32_R_TYPE(outrel.r_info) != R_VAX_JMP_SLOT
1725 && ELF32_R_TYPE(outrel.r_info) != R_VAX_GLOB_DAT))
1728 (*_bfd_error_handler)
1729 (_("%s: warning: %s relocation against symbol `%s' from %s section"),
1730 bfd_get_filename (input_bfd), howto->name,
1731 h->root.root.string,
1732 bfd_get_section_name (input_bfd, input_section));
1734 (*_bfd_error_handler)
1735 (_("%s: warning: %s relocation to 0x%x from %s section"),
1736 bfd_get_filename (input_bfd), howto->name,
1738 bfd_get_section_name (input_bfd, input_section));
1740 loc = sreloc->contents;
1741 loc += sreloc->reloc_count++ * sizeof (Elf32_External_Rela);
1742 bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc);
1744 /* This reloc will be computed at runtime, so there's no
1745 need to do anything now, except for R_VAX_32
1746 relocations that have been turned into
1754 case R_VAX_GNU_VTINHERIT:
1755 case R_VAX_GNU_VTENTRY:
1756 /* These are no-ops in the end. */
1763 /* VAX PCREL relocations are from the end of relocation, not the start.
1764 So subtract the difference from the relocation amount since we can't
1765 add it to the offset. */
1766 if (howto->pc_relative && howto->pcrel_offset)
1767 relocation -= bfd_get_reloc_size(howto);
1769 r = _bfd_final_link_relocate (howto, input_bfd, input_section,
1770 contents, rel->r_offset,
1771 relocation, rel->r_addend);
1773 if (r != bfd_reloc_ok)
1778 case bfd_reloc_outofrange:
1780 case bfd_reloc_overflow:
1788 name = bfd_elf_string_from_elf_section (input_bfd,
1789 symtab_hdr->sh_link,
1794 name = bfd_section_name (input_bfd, sec);
1796 if (!(info->callbacks->reloc_overflow
1797 (info, (h ? &h->root : NULL), name, howto->name,
1798 (bfd_vma) 0, input_bfd, input_section,
1810 /* Finish up dynamic symbol handling. We set the contents of various
1811 dynamic sections here. */
1814 elf_vax_finish_dynamic_symbol (bfd *output_bfd, struct bfd_link_info *info,
1815 struct elf_link_hash_entry *h,
1816 Elf_Internal_Sym *sym)
1820 dynobj = elf_hash_table (info)->dynobj;
1822 if (h->plt.offset != (bfd_vma) -1)
1830 Elf_Internal_Rela rela;
1833 /* This symbol has an entry in the procedure linkage table. Set
1835 BFD_ASSERT (h->dynindx != -1);
1837 splt = bfd_get_section_by_name (dynobj, ".plt");
1838 sgot = bfd_get_section_by_name (dynobj, ".got.plt");
1839 srela = bfd_get_section_by_name (dynobj, ".rela.plt");
1840 BFD_ASSERT (splt != NULL && sgot != NULL && srela != NULL);
1842 addend = 2 * (h->plt.offset & 1);
1843 h->plt.offset &= ~1;
1845 /* Get the index in the procedure linkage table which
1846 corresponds to this symbol. This is the index of this symbol
1847 in all the symbols for which we are making plt entries. The
1848 first entry in the procedure linkage table is reserved. */
1849 plt_index = h->plt.offset / PLT_ENTRY_SIZE - 1;
1851 /* Get the offset into the .got table of the entry that
1852 corresponds to this function. Each .got entry is 4 bytes.
1853 The first two are reserved. */
1854 got_offset = (plt_index + 3) * 4;
1856 /* Fill in the entry in the procedure linkage table. */
1857 memcpy (splt->contents + h->plt.offset, elf_vax_plt_entry,
1860 /* The offset is relative to the first extension word. */
1861 bfd_put_32 (output_bfd,
1862 -(h->plt.offset + 8),
1863 splt->contents + h->plt.offset + 4);
1865 bfd_put_32 (output_bfd, plt_index * sizeof (Elf32_External_Rela),
1866 splt->contents + h->plt.offset + 8);
1868 /* Fill in the entry in the global offset table. */
1869 bfd_put_32 (output_bfd,
1870 (splt->output_section->vma
1871 + splt->output_offset
1872 + h->plt.offset) + addend,
1873 sgot->contents + got_offset);
1875 /* Fill in the entry in the .rela.plt section. */
1876 rela.r_offset = (sgot->output_section->vma
1877 + sgot->output_offset
1879 rela.r_info = ELF32_R_INFO (h->dynindx, R_VAX_JMP_SLOT);
1880 rela.r_addend = addend;
1881 loc = srela->contents + plt_index * sizeof (Elf32_External_Rela);
1882 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
1884 if (!h->def_regular)
1886 /* Mark the symbol as undefined, rather than as defined in
1887 the .plt section. Leave the value alone. */
1888 sym->st_shndx = SHN_UNDEF;
1892 if (h->got.offset != (bfd_vma) -1)
1896 Elf_Internal_Rela rela;
1899 /* This symbol has an entry in the global offset table. Set it
1901 sgot = bfd_get_section_by_name (dynobj, ".got");
1902 srela = bfd_get_section_by_name (dynobj, ".rela.got");
1903 BFD_ASSERT (sgot != NULL && srela != NULL);
1905 rela.r_offset = (sgot->output_section->vma
1906 + sgot->output_offset
1907 + (h->got.offset &~ 1));
1909 /* If the symbol was forced to be local because of a version file
1910 locally we just want to emit a RELATIVE reloc. The entry in
1911 the global offset table will already have been initialized in
1912 the relocate_section function. */
1917 rela.r_info = ELF32_R_INFO (0, R_VAX_RELATIVE);
1921 rela.r_info = ELF32_R_INFO (h->dynindx, R_VAX_GLOB_DAT);
1923 rela.r_addend = bfd_get_signed_32 (output_bfd,
1925 + (h->got.offset & ~1)));
1927 loc = srela->contents;
1928 loc += srela->reloc_count++ * sizeof (Elf32_External_Rela);
1929 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
1935 Elf_Internal_Rela rela;
1938 /* This symbol needs a copy reloc. Set it up. */
1939 BFD_ASSERT (h->dynindx != -1
1940 && (h->root.type == bfd_link_hash_defined
1941 || h->root.type == bfd_link_hash_defweak));
1943 s = bfd_get_section_by_name (h->root.u.def.section->owner,
1945 BFD_ASSERT (s != NULL);
1947 rela.r_offset = (h->root.u.def.value
1948 + h->root.u.def.section->output_section->vma
1949 + h->root.u.def.section->output_offset);
1950 rela.r_info = ELF32_R_INFO (h->dynindx, R_VAX_COPY);
1952 loc = s->contents + s->reloc_count++ * sizeof (Elf32_External_Rela);
1953 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
1956 /* Mark _DYNAMIC and _GLOBAL_OFFSET_TABLE_ as absolute. */
1957 if (strcmp (h->root.root.string, "_DYNAMIC") == 0
1958 || h == elf_hash_table (info)->hgot)
1959 sym->st_shndx = SHN_ABS;
1964 /* Finish up the dynamic sections. */
1967 elf_vax_finish_dynamic_sections (bfd *output_bfd, struct bfd_link_info *info)
1973 dynobj = elf_hash_table (info)->dynobj;
1975 sgot = bfd_get_section_by_name (dynobj, ".got.plt");
1976 BFD_ASSERT (sgot != NULL);
1977 sdyn = bfd_get_section_by_name (dynobj, ".dynamic");
1979 if (elf_hash_table (info)->dynamic_sections_created)
1982 Elf32_External_Dyn *dyncon, *dynconend;
1984 splt = bfd_get_section_by_name (dynobj, ".plt");
1985 BFD_ASSERT (splt != NULL && sdyn != NULL);
1987 dyncon = (Elf32_External_Dyn *) sdyn->contents;
1988 dynconend = (Elf32_External_Dyn *) (sdyn->contents + sdyn->size);
1989 for (; dyncon < dynconend; dyncon++)
1991 Elf_Internal_Dyn dyn;
1995 bfd_elf32_swap_dyn_in (dynobj, dyncon, &dyn);
2008 s = bfd_get_section_by_name (output_bfd, name);
2009 BFD_ASSERT (s != NULL);
2010 dyn.d_un.d_ptr = s->vma;
2011 bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon);
2015 s = bfd_get_section_by_name (output_bfd, ".rela.plt");
2016 BFD_ASSERT (s != NULL);
2017 dyn.d_un.d_val = s->size;
2018 bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon);
2022 /* The procedure linkage table relocs (DT_JMPREL) should
2023 not be included in the overall relocs (DT_RELA).
2024 Therefore, we override the DT_RELASZ entry here to
2025 make it not include the JMPREL relocs. Since the
2026 linker script arranges for .rela.plt to follow all
2027 other relocation sections, we don't have to worry
2028 about changing the DT_RELA entry. */
2029 s = bfd_get_section_by_name (output_bfd, ".rela.plt");
2031 dyn.d_un.d_val -= s->size;
2032 bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon);
2037 /* Fill in the first entry in the procedure linkage table. */
2040 memcpy (splt->contents, elf_vax_plt0_entry, PLT_ENTRY_SIZE);
2041 bfd_put_32 (output_bfd,
2042 (sgot->output_section->vma
2043 + sgot->output_offset + 4
2044 - (splt->output_section->vma + 6)),
2045 splt->contents + 2);
2046 bfd_put_32 (output_bfd,
2047 (sgot->output_section->vma
2048 + sgot->output_offset + 8
2049 - (splt->output_section->vma + 12)),
2050 splt->contents + 8);
2051 elf_section_data (splt->output_section)->this_hdr.sh_entsize
2056 /* Fill in the first three entries in the global offset table. */
2060 bfd_put_32 (output_bfd, (bfd_vma) 0, sgot->contents);
2062 bfd_put_32 (output_bfd,
2063 sdyn->output_section->vma + sdyn->output_offset,
2065 bfd_put_32 (output_bfd, (bfd_vma) 0, sgot->contents + 4);
2066 bfd_put_32 (output_bfd, (bfd_vma) 0, sgot->contents + 8);
2069 elf_section_data (sgot->output_section)->this_hdr.sh_entsize = 4;
2074 #define TARGET_LITTLE_SYM bfd_elf32_vax_vec
2075 #define TARGET_LITTLE_NAME "elf32-vax"
2076 #define ELF_MACHINE_CODE EM_VAX
2077 #define ELF_MAXPAGESIZE 0x1000
2079 #define elf_backend_create_dynamic_sections \
2080 _bfd_elf_create_dynamic_sections
2081 #define bfd_elf32_bfd_link_hash_table_create \
2082 elf_vax_link_hash_table_create
2083 #define bfd_elf32_bfd_final_link bfd_elf_gc_common_final_link
2085 #define elf_backend_check_relocs elf_vax_check_relocs
2086 #define elf_backend_adjust_dynamic_symbol \
2087 elf_vax_adjust_dynamic_symbol
2088 #define elf_backend_size_dynamic_sections \
2089 elf_vax_size_dynamic_sections
2090 #define elf_backend_relocate_section elf_vax_relocate_section
2091 #define elf_backend_finish_dynamic_symbol \
2092 elf_vax_finish_dynamic_symbol
2093 #define elf_backend_finish_dynamic_sections \
2094 elf_vax_finish_dynamic_sections
2095 #define elf_backend_gc_mark_hook elf_vax_gc_mark_hook
2096 #define elf_backend_gc_sweep_hook elf_vax_gc_sweep_hook
2097 #define bfd_elf32_bfd_merge_private_bfd_data \
2098 elf32_vax_merge_private_bfd_data
2099 #define bfd_elf32_bfd_set_private_flags \
2100 elf32_vax_set_private_flags
2101 #define bfd_elf32_bfd_print_private_bfd_data \
2102 elf32_vax_print_private_bfd_data
2104 #define elf_backend_can_gc_sections 1
2105 #define elf_backend_want_got_plt 1
2106 #define elf_backend_plt_readonly 1
2107 #define elf_backend_want_plt_sym 0
2108 #define elf_backend_got_header_size 16
2109 #define elf_backend_rela_normal 1
2111 #include "elf32-target.h"