1 /* VAX series support for 32-bit ELF
2 Copyright (C) 1993-2019 Free Software Foundation, Inc.
3 Contributed by Matt Thomas <matt@3am-software.com>.
5 This file is part of BFD, the Binary File Descriptor library.
7 This program is free software; you can redistribute it and/or modify
8 it under the terms of the GNU General Public License as published by
9 the Free Software Foundation; either version 3 of the License, or
10 (at your option) any later version.
12 This program is distributed in the hope that it will be useful,
13 but WITHOUT ANY WARRANTY; without even the implied warranty of
14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 GNU General Public License for more details.
17 You should have received a copy of the GNU General Public License
18 along with this program; if not, write to the Free Software
19 Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston,
20 MA 02110-1301, USA. */
29 static reloc_howto_type *reloc_type_lookup (bfd *, bfd_reloc_code_real_type);
30 static bfd_boolean rtype_to_howto (bfd *, arelent *, Elf_Internal_Rela *);
31 static struct bfd_hash_entry *elf_vax_link_hash_newfunc (struct bfd_hash_entry *,
32 struct bfd_hash_table *,
34 static struct bfd_link_hash_table *elf_vax_link_hash_table_create (bfd *);
35 static bfd_boolean elf_vax_check_relocs (bfd *, struct bfd_link_info *,
36 asection *, const Elf_Internal_Rela *);
37 static bfd_boolean elf_vax_adjust_dynamic_symbol (struct bfd_link_info *,
38 struct elf_link_hash_entry *);
39 static bfd_boolean elf_vax_size_dynamic_sections (bfd *, struct bfd_link_info *);
40 static bfd_boolean elf_vax_relocate_section (bfd *, struct bfd_link_info *,
41 bfd *, asection *, bfd_byte *,
43 Elf_Internal_Sym *, asection **);
44 static bfd_boolean elf_vax_finish_dynamic_symbol (bfd *, struct bfd_link_info *,
45 struct elf_link_hash_entry *,
47 static bfd_boolean elf_vax_finish_dynamic_sections (bfd *,
48 struct bfd_link_info *);
49 static bfd_vma elf_vax_plt_sym_val (bfd_vma, const asection *,
52 static bfd_boolean elf32_vax_set_private_flags (bfd *, flagword);
53 static bfd_boolean elf32_vax_print_private_bfd_data (bfd *, void *);
55 static reloc_howto_type howto_table[] = {
56 HOWTO (R_VAX_NONE, /* type */
58 3, /* size (0 = byte, 1 = short, 2 = long) */
60 FALSE, /* pc_relative */
62 complain_overflow_dont, /* complain_on_overflow */
63 bfd_elf_generic_reloc, /* special_function */
64 "R_VAX_NONE", /* name */
65 FALSE, /* partial_inplace */
67 0x00000000, /* dst_mask */
68 FALSE), /* pcrel_offset */
70 HOWTO (R_VAX_32, /* type */
72 2, /* size (0 = byte, 1 = short, 2 = long) */
74 FALSE, /* pc_relative */
76 complain_overflow_bitfield, /* complain_on_overflow */
77 bfd_elf_generic_reloc, /* special_function */
78 "R_VAX_32", /* name */
79 FALSE, /* partial_inplace */
81 0xffffffff, /* dst_mask */
82 FALSE), /* pcrel_offset */
84 HOWTO (R_VAX_16, /* type */
86 1, /* size (0 = byte, 1 = short, 2 = long) */
88 FALSE, /* pc_relative */
90 complain_overflow_bitfield, /* complain_on_overflow */
91 bfd_elf_generic_reloc, /* special_function */
92 "R_VAX_16", /* name */
93 FALSE, /* partial_inplace */
95 0x0000ffff, /* dst_mask */
96 FALSE), /* pcrel_offset */
98 HOWTO (R_VAX_8, /* type */
100 0, /* size (0 = byte, 1 = short, 2 = long) */
102 FALSE, /* pc_relative */
104 complain_overflow_bitfield, /* complain_on_overflow */
105 bfd_elf_generic_reloc, /* special_function */
106 "R_VAX_8", /* name */
107 FALSE, /* partial_inplace */
109 0x000000ff, /* dst_mask */
110 FALSE), /* pcrel_offset */
112 HOWTO (R_VAX_PC32, /* type */
114 2, /* size (0 = byte, 1 = short, 2 = long) */
116 TRUE, /* pc_relative */
118 complain_overflow_bitfield, /* complain_on_overflow */
119 bfd_elf_generic_reloc, /* special_function */
120 "R_VAX_PC32", /* name */
121 FALSE, /* partial_inplace */
123 0xffffffff, /* dst_mask */
124 TRUE), /* pcrel_offset */
126 HOWTO (R_VAX_PC16, /* type */
128 1, /* size (0 = byte, 1 = short, 2 = long) */
130 TRUE, /* pc_relative */
132 complain_overflow_signed, /* complain_on_overflow */
133 bfd_elf_generic_reloc, /* special_function */
134 "R_VAX_PC16", /* name */
135 FALSE, /* partial_inplace */
137 0x0000ffff, /* dst_mask */
138 TRUE), /* pcrel_offset */
140 HOWTO (R_VAX_PC8, /* type */
142 0, /* size (0 = byte, 1 = short, 2 = long) */
144 TRUE, /* pc_relative */
146 complain_overflow_signed, /* complain_on_overflow */
147 bfd_elf_generic_reloc, /* special_function */
148 "R_VAX_PC8", /* name */
149 FALSE, /* partial_inplace */
151 0x000000ff, /* dst_mask */
152 TRUE), /* pcrel_offset */
154 HOWTO (R_VAX_GOT32, /* type */
156 2, /* size (0 = byte, 1 = short, 2 = long) */
158 TRUE, /* pc_relative */
160 complain_overflow_bitfield, /* complain_on_overflow */
161 bfd_elf_generic_reloc, /* special_function */
162 "R_VAX_GOT32", /* name */
163 FALSE, /* partial_inplace */
165 0xffffffff, /* dst_mask */
166 TRUE), /* pcrel_offset */
174 HOWTO (R_VAX_PLT32, /* type */
176 2, /* size (0 = byte, 1 = short, 2 = long) */
178 TRUE, /* pc_relative */
180 complain_overflow_bitfield, /* complain_on_overflow */
181 bfd_elf_generic_reloc, /* special_function */
182 "R_VAX_PLT32", /* name */
183 FALSE, /* partial_inplace */
185 0xffffffff, /* dst_mask */
186 TRUE), /* pcrel_offset */
194 HOWTO (R_VAX_COPY, /* type */
196 0, /* size (0 = byte, 1 = short, 2 = long) */
198 FALSE, /* pc_relative */
200 complain_overflow_dont, /* complain_on_overflow */
201 bfd_elf_generic_reloc, /* special_function */
202 "R_VAX_COPY", /* name */
203 FALSE, /* partial_inplace */
205 0xffffffff, /* dst_mask */
206 FALSE), /* pcrel_offset */
208 HOWTO (R_VAX_GLOB_DAT, /* type */
210 2, /* size (0 = byte, 1 = short, 2 = long) */
212 FALSE, /* pc_relative */
214 complain_overflow_dont, /* complain_on_overflow */
215 bfd_elf_generic_reloc, /* special_function */
216 "R_VAX_GLOB_DAT", /* name */
217 FALSE, /* partial_inplace */
219 0xffffffff, /* dst_mask */
220 FALSE), /* pcrel_offset */
222 HOWTO (R_VAX_JMP_SLOT, /* type */
224 2, /* size (0 = byte, 1 = short, 2 = long) */
226 FALSE, /* pc_relative */
228 complain_overflow_dont, /* complain_on_overflow */
229 bfd_elf_generic_reloc, /* special_function */
230 "R_VAX_JMP_SLOT", /* name */
231 FALSE, /* partial_inplace */
233 0xffffffff, /* dst_mask */
234 FALSE), /* pcrel_offset */
236 HOWTO (R_VAX_RELATIVE, /* type */
238 2, /* size (0 = byte, 1 = short, 2 = long) */
240 FALSE, /* pc_relative */
242 complain_overflow_dont, /* complain_on_overflow */
243 bfd_elf_generic_reloc, /* special_function */
244 "R_VAX_RELATIVE", /* name */
245 FALSE, /* partial_inplace */
247 0xffffffff, /* dst_mask */
248 FALSE), /* pcrel_offset */
250 /* GNU extension to record C++ vtable hierarchy */
251 HOWTO (R_VAX_GNU_VTINHERIT, /* type */
253 2, /* size (0 = byte, 1 = short, 2 = long) */
255 FALSE, /* pc_relative */
257 complain_overflow_dont, /* complain_on_overflow */
258 NULL, /* special_function */
259 "R_VAX_GNU_VTINHERIT", /* name */
260 FALSE, /* partial_inplace */
263 FALSE), /* pcrel_offset */
265 /* GNU extension to record C++ vtable member usage */
266 HOWTO (R_VAX_GNU_VTENTRY, /* type */
268 2, /* size (0 = byte, 1 = short, 2 = long) */
270 FALSE, /* pc_relative */
272 complain_overflow_dont, /* complain_on_overflow */
273 _bfd_elf_rel_vtable_reloc_fn, /* special_function */
274 "R_VAX_GNU_VTENTRY", /* name */
275 FALSE, /* partial_inplace */
278 FALSE), /* pcrel_offset */
282 rtype_to_howto (bfd *abfd, arelent *cache_ptr, Elf_Internal_Rela *dst)
286 r_type = ELF32_R_TYPE (dst->r_info);
287 if (r_type >= R_VAX_max)
289 /* xgettext:c-format */
290 _bfd_error_handler (_("%pB: unsupported relocation type %#x"),
292 bfd_set_error (bfd_error_bad_value);
295 cache_ptr->howto = &howto_table[r_type];
299 #define elf_info_to_howto rtype_to_howto
303 bfd_reloc_code_real_type bfd_val;
306 { BFD_RELOC_NONE, R_VAX_NONE },
307 { BFD_RELOC_32, R_VAX_32 },
308 { BFD_RELOC_16, R_VAX_16 },
309 { BFD_RELOC_8, R_VAX_8 },
310 { BFD_RELOC_32_PCREL, R_VAX_PC32 },
311 { BFD_RELOC_16_PCREL, R_VAX_PC16 },
312 { BFD_RELOC_8_PCREL, R_VAX_PC8 },
313 { BFD_RELOC_32_GOT_PCREL, R_VAX_GOT32 },
314 { BFD_RELOC_32_PLT_PCREL, R_VAX_PLT32 },
315 { BFD_RELOC_NONE, R_VAX_COPY },
316 { BFD_RELOC_VAX_GLOB_DAT, R_VAX_GLOB_DAT },
317 { BFD_RELOC_VAX_JMP_SLOT, R_VAX_JMP_SLOT },
318 { BFD_RELOC_VAX_RELATIVE, R_VAX_RELATIVE },
319 { BFD_RELOC_CTOR, R_VAX_32 },
320 { BFD_RELOC_VTABLE_INHERIT, R_VAX_GNU_VTINHERIT },
321 { BFD_RELOC_VTABLE_ENTRY, R_VAX_GNU_VTENTRY },
324 static reloc_howto_type *
325 reloc_type_lookup (bfd *abfd ATTRIBUTE_UNUSED, bfd_reloc_code_real_type code)
328 for (i = 0; i < sizeof (reloc_map) / sizeof (reloc_map[0]); i++)
330 if (reloc_map[i].bfd_val == code)
331 return &howto_table[reloc_map[i].elf_val];
336 static reloc_howto_type *
337 reloc_name_lookup (bfd *abfd ATTRIBUTE_UNUSED,
342 for (i = 0; i < sizeof (howto_table) / sizeof (howto_table[0]); i++)
343 if (howto_table[i].name != NULL
344 && strcasecmp (howto_table[i].name, r_name) == 0)
345 return &howto_table[i];
350 #define bfd_elf32_bfd_reloc_type_lookup reloc_type_lookup
351 #define bfd_elf32_bfd_reloc_name_lookup reloc_name_lookup
352 #define ELF_ARCH bfd_arch_vax
353 /* end code generated by elf.el */
355 /* Functions for the VAX ELF linker. */
357 /* The name of the dynamic interpreter. This is put in the .interp
360 #define ELF_DYNAMIC_INTERPRETER "/usr/libexec/ld.elf_so"
362 /* The size in bytes of an entry in the procedure linkage table. */
364 #define PLT_ENTRY_SIZE 12
366 /* The first entry in a procedure linkage table looks like this. See
367 the SVR4 ABI VAX supplement to see how this works. */
369 static const bfd_byte elf_vax_plt0_entry[PLT_ENTRY_SIZE] =
371 0xdd, 0xef, /* pushl l^ */
372 0, 0, 0, 0, /* offset to .plt.got + 4 */
373 0x17, 0xff, /* jmp @L^(pc) */
374 0, 0, 0, 0, /* offset to .plt.got + 8 */
377 /* Subsequent entries in a procedure linkage table look like this. */
379 static const bfd_byte elf_vax_plt_entry[PLT_ENTRY_SIZE] =
381 0xfc, 0x0f, /* .word ^M<r11:r2> */
382 0x16, 0xef, /* jsb L^(pc) */
383 0, 0, 0, 0, /* replaced with offset to start of .plt */
384 0, 0, 0, 0, /* index into .rela.plt */
387 /* The VAX linker needs to keep track of the number of relocs that it
388 decides to copy in check_relocs for each symbol. This is so that it
389 can discard PC relative relocs if it doesn't need them when linking
390 with -Bsymbolic. We store the information in a field extending the
391 regular ELF linker hash table. */
393 /* This structure keeps track of the number of PC relative relocs we have
394 copied for a given symbol. */
396 struct elf_vax_pcrel_relocs_copied
399 struct elf_vax_pcrel_relocs_copied *next;
400 /* A section in dynobj. */
402 /* Number of relocs copied in this section. */
406 /* VAX ELF linker hash entry. */
408 struct elf_vax_link_hash_entry
410 struct elf_link_hash_entry root;
412 /* Number of PC relative relocs copied for this symbol. */
413 struct elf_vax_pcrel_relocs_copied *pcrel_relocs_copied;
418 /* Declare this now that the above structures are defined. */
420 static bfd_boolean elf_vax_discard_copies (struct elf_vax_link_hash_entry *,
423 /* Declare this now that the above structures are defined. */
425 static bfd_boolean elf_vax_instantiate_got_entries (struct elf_link_hash_entry *,
428 /* Traverse an VAX ELF linker hash table. */
430 #define elf_vax_link_hash_traverse(table, func, info) \
431 (elf_link_hash_traverse \
433 (bfd_boolean (*) (struct elf_link_hash_entry *, void *)) (func), \
436 /* Create an entry in an VAX ELF linker hash table. */
438 static struct bfd_hash_entry *
439 elf_vax_link_hash_newfunc (struct bfd_hash_entry *entry,
440 struct bfd_hash_table *table,
443 struct elf_vax_link_hash_entry *ret =
444 (struct elf_vax_link_hash_entry *) entry;
446 /* Allocate the structure if it has not already been allocated by a
449 ret = ((struct elf_vax_link_hash_entry *)
450 bfd_hash_allocate (table,
451 sizeof (struct elf_vax_link_hash_entry)));
453 return (struct bfd_hash_entry *) ret;
455 /* Call the allocation method of the superclass. */
456 ret = ((struct elf_vax_link_hash_entry *)
457 _bfd_elf_link_hash_newfunc ((struct bfd_hash_entry *) ret,
461 ret->pcrel_relocs_copied = NULL;
464 return (struct bfd_hash_entry *) ret;
467 /* Create an VAX ELF linker hash table. */
469 static struct bfd_link_hash_table *
470 elf_vax_link_hash_table_create (bfd *abfd)
472 struct elf_link_hash_table *ret;
473 bfd_size_type amt = sizeof (struct elf_link_hash_table);
475 ret = bfd_zmalloc (amt);
479 if (!_bfd_elf_link_hash_table_init (ret, abfd,
480 elf_vax_link_hash_newfunc,
481 sizeof (struct elf_vax_link_hash_entry),
491 /* Keep vax-specific flags in the ELF header */
493 elf32_vax_set_private_flags (bfd *abfd, flagword flags)
495 elf_elfheader (abfd)->e_flags = flags;
496 elf_flags_init (abfd) = TRUE;
500 /* Merge backend specific data from an object file to the output
501 object file when linking. */
503 elf32_vax_merge_private_bfd_data (bfd *ibfd, struct bfd_link_info *info)
505 bfd *obfd = info->output_bfd;
508 if ( bfd_get_flavour (ibfd) != bfd_target_elf_flavour
509 || bfd_get_flavour (obfd) != bfd_target_elf_flavour)
512 in_flags = elf_elfheader (ibfd)->e_flags;
514 if (!elf_flags_init (obfd))
516 elf_flags_init (obfd) = TRUE;
517 elf_elfheader (obfd)->e_flags = in_flags;
523 /* Display the flags field */
525 elf32_vax_print_private_bfd_data (bfd *abfd, void * ptr)
527 FILE *file = (FILE *) ptr;
529 BFD_ASSERT (abfd != NULL && ptr != NULL);
531 /* Print normal ELF private data. */
532 _bfd_elf_print_private_bfd_data (abfd, ptr);
534 /* Ignore init flag - it may not be set, despite the flags field containing valid data. */
536 /* xgettext:c-format */
537 fprintf (file, _("private flags = %lx:"), elf_elfheader (abfd)->e_flags);
539 if (elf_elfheader (abfd)->e_flags & EF_VAX_NONPIC)
540 fprintf (file, _(" [nonpic]"));
542 if (elf_elfheader (abfd)->e_flags & EF_VAX_DFLOAT)
543 fprintf (file, _(" [d-float]"));
545 if (elf_elfheader (abfd)->e_flags & EF_VAX_GFLOAT)
546 fprintf (file, _(" [g-float]"));
552 /* Look through the relocs for a section during the first phase, and
553 allocate space in the global offset table or procedure linkage
557 elf_vax_check_relocs (bfd *abfd, struct bfd_link_info *info, asection *sec,
558 const Elf_Internal_Rela *relocs)
561 Elf_Internal_Shdr *symtab_hdr;
562 struct elf_link_hash_entry **sym_hashes;
563 const Elf_Internal_Rela *rel;
564 const Elf_Internal_Rela *rel_end;
567 if (bfd_link_relocatable (info))
570 dynobj = elf_hash_table (info)->dynobj;
571 symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
572 sym_hashes = elf_sym_hashes (abfd);
576 rel_end = relocs + sec->reloc_count;
577 for (rel = relocs; rel < rel_end; rel++)
579 unsigned long r_symndx;
580 struct elf_link_hash_entry *h;
582 r_symndx = ELF32_R_SYM (rel->r_info);
584 if (r_symndx < symtab_hdr->sh_info)
588 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
589 while (h->root.type == bfd_link_hash_indirect
590 || h->root.type == bfd_link_hash_warning)
591 h = (struct elf_link_hash_entry *) h->root.u.i.link;
594 switch (ELF32_R_TYPE (rel->r_info))
597 BFD_ASSERT (h != NULL);
599 /* If this is a local symbol, we resolve it directly without
600 creating a global offset table entry. */
602 || h == elf_hash_table (info)->hgot
603 || h == elf_hash_table (info)->hplt)
606 /* This symbol requires a global offset table entry. */
610 /* Create the .got section. */
611 elf_hash_table (info)->dynobj = dynobj = abfd;
612 if (!_bfd_elf_create_got_section (dynobj, info))
618 struct elf_vax_link_hash_entry *eh;
620 eh = (struct elf_vax_link_hash_entry *) h;
621 if (h->got.refcount == -1)
624 eh->got_addend = rel->r_addend;
629 if (eh->got_addend != (bfd_vma) rel->r_addend)
631 /* xgettext:c-format */
632 (_("%pB: warning: GOT addend of %" PRId64 " to `%s' does"
633 " not match previous GOT addend of %" PRId64),
634 abfd, (int64_t) rel->r_addend, h->root.root.string,
635 (int64_t) eh->got_addend);
642 /* This symbol requires a procedure linkage table entry. We
643 actually build the entry in adjust_dynamic_symbol,
644 because this might be a case of linking PIC code which is
645 never referenced by a dynamic object, in which case we
646 don't need to generate a procedure linkage table entry
648 BFD_ASSERT (h != NULL);
650 /* If this is a local symbol, we resolve it directly without
651 creating a procedure linkage table entry. */
656 if (h->plt.refcount == -1)
665 /* If we are creating a shared library and this is not a local
666 symbol, we need to copy the reloc into the shared library.
667 However when linking with -Bsymbolic and this is a global
668 symbol which is defined in an object we are including in the
669 link (i.e., DEF_REGULAR is set), then we can resolve the
670 reloc directly. At this point we have not seen all the input
671 files, so it is possible that DEF_REGULAR is not set now but
672 will be set later (it is never cleared). We account for that
673 possibility below by storing information in the
674 pcrel_relocs_copied field of the hash table entry. */
675 if (!(bfd_link_pic (info)
676 && (sec->flags & SEC_ALLOC) != 0
679 || !h->def_regular)))
682 && ELF_ST_VISIBILITY (h->other) == STV_DEFAULT
685 /* Make sure a plt entry is created for this symbol if
686 it turns out to be a function defined by a dynamic
688 if (h->plt.refcount == -1)
695 /* If this is a local symbol, we can resolve it directly. */
697 && (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT
705 if (h != NULL && ELF_ST_VISIBILITY (h->other) == STV_DEFAULT)
707 /* Make sure a plt entry is created for this symbol if it
708 turns out to be a function defined by a dynamic object. */
709 if (h->plt.refcount == -1)
715 /* If we are creating a shared library, we need to copy the
716 reloc into the shared library. */
717 if (bfd_link_pic (info)
718 && (sec->flags & SEC_ALLOC) != 0)
720 /* When creating a shared object, we must copy these
721 reloc types into the output file. We create a reloc
722 section in dynobj and make room for this reloc. */
725 sreloc = _bfd_elf_make_dynamic_reloc_section
726 (sec, dynobj, 2, abfd, /*rela?*/ TRUE);
731 if (sec->flags & SEC_READONLY)
732 info->flags |= DF_TEXTREL;
735 sreloc->size += sizeof (Elf32_External_Rela);
737 /* If we are linking with -Bsymbolic, we count the number of
738 PC relative relocations we have entered for this symbol,
739 so that we can discard them again if the symbol is later
740 defined by a regular object. Note that this function is
741 only called if we are using a vaxelf linker hash table,
742 which means that h is really a pointer to an
743 elf_vax_link_hash_entry. */
744 if ((ELF32_R_TYPE (rel->r_info) == R_VAX_PC8
745 || ELF32_R_TYPE (rel->r_info) == R_VAX_PC16
746 || ELF32_R_TYPE (rel->r_info) == R_VAX_PC32)
749 struct elf_vax_link_hash_entry *eh;
750 struct elf_vax_pcrel_relocs_copied *p;
752 eh = (struct elf_vax_link_hash_entry *) h;
754 for (p = eh->pcrel_relocs_copied; p != NULL; p = p->next)
755 if (p->section == sreloc)
760 p = ((struct elf_vax_pcrel_relocs_copied *)
761 bfd_alloc (dynobj, (bfd_size_type) sizeof *p));
764 p->next = eh->pcrel_relocs_copied;
765 eh->pcrel_relocs_copied = p;
776 /* This relocation describes the C++ object vtable hierarchy.
777 Reconstruct it for later use during GC. */
778 case R_VAX_GNU_VTINHERIT:
779 if (!bfd_elf_gc_record_vtinherit (abfd, sec, h, rel->r_offset))
783 /* This relocation describes which C++ vtable entries are actually
784 used. Record for later use during GC. */
785 case R_VAX_GNU_VTENTRY:
786 if (!bfd_elf_gc_record_vtentry (abfd, sec, h, rel->r_addend))
798 /* Return the section that should be marked against GC for a given
802 elf_vax_gc_mark_hook (asection *sec,
803 struct bfd_link_info *info,
804 Elf_Internal_Rela *rel,
805 struct elf_link_hash_entry *h,
806 Elf_Internal_Sym *sym)
809 switch (ELF32_R_TYPE (rel->r_info))
811 case R_VAX_GNU_VTINHERIT:
812 case R_VAX_GNU_VTENTRY:
816 return _bfd_elf_gc_mark_hook (sec, info, rel, h, sym);
819 /* Adjust a symbol defined by a dynamic object and referenced by a
820 regular object. The current definition is in some section of the
821 dynamic object, but we're not including those sections. We have to
822 change the definition to something the rest of the link can
826 elf_vax_adjust_dynamic_symbol (struct bfd_link_info *info,
827 struct elf_link_hash_entry *h)
832 dynobj = elf_hash_table (info)->dynobj;
834 /* Make sure we know what is going on here. */
835 BFD_ASSERT (dynobj != NULL
840 && !h->def_regular)));
842 /* If this is a function, put it in the procedure linkage table. We
843 will fill in the contents of the procedure linkage table later,
844 when we know the address of the .got section. */
845 if (h->type == STT_FUNC
848 if (h->plt.refcount <= 0
849 || SYMBOL_CALLS_LOCAL (info, h)
850 || (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT
851 && h->root.type == bfd_link_hash_undefweak))
853 /* This case can occur if we saw a PLTxx reloc in an input
854 file, but the symbol was never referred to by a dynamic
855 object, or if all references were garbage collected. In
856 such a case, we don't actually need to build a procedure
857 linkage table, and we can just do a PCxx reloc instead. */
858 h->plt.offset = (bfd_vma) -1;
863 s = elf_hash_table (info)->splt;
864 BFD_ASSERT (s != NULL);
866 /* If this is the first .plt entry, make room for the special
870 s->size += PLT_ENTRY_SIZE;
873 /* If this symbol is not defined in a regular file, and we are
874 not generating a shared library, then set the symbol to this
875 location in the .plt. This is required to make function
876 pointers compare as equal between the normal executable and
877 the shared library. */
878 if (!bfd_link_pic (info)
881 h->root.u.def.section = s;
882 h->root.u.def.value = s->size;
885 h->plt.offset = s->size;
887 /* Make room for this entry. */
888 s->size += PLT_ENTRY_SIZE;
890 /* We also need to make an entry in the .got.plt section, which
891 will be placed in the .got section by the linker script. */
893 s = elf_hash_table (info)->sgotplt;
894 BFD_ASSERT (s != NULL);
897 /* We also need to make an entry in the .rela.plt section. */
899 s = elf_hash_table (info)->srelplt;
900 BFD_ASSERT (s != NULL);
901 s->size += sizeof (Elf32_External_Rela);
906 /* Reinitialize the plt offset now that it is not used as a reference
908 h->plt.offset = (bfd_vma) -1;
910 /* If this is a weak symbol, and there is a real definition, the
911 processor independent code will have arranged for us to see the
912 real definition first, and we can just use the same value. */
915 struct elf_link_hash_entry *def = weakdef (h);
916 BFD_ASSERT (def->root.type == bfd_link_hash_defined);
917 h->root.u.def.section = def->root.u.def.section;
918 h->root.u.def.value = def->root.u.def.value;
922 /* This is a reference to a symbol defined by a dynamic object which
923 is not a function. */
925 /* If we are creating a shared library, we must presume that the
926 only references to the symbol are via the global offset table.
927 For such cases we need not do anything here; the relocations will
928 be handled correctly by relocate_section. */
929 if (bfd_link_pic (info))
932 /* We must allocate the symbol in our .dynbss section, which will
933 become part of the .bss section of the executable. There will be
934 an entry for this symbol in the .dynsym section. The dynamic
935 object will contain position independent code, so all references
936 from the dynamic object to this symbol will go through the global
937 offset table. The dynamic linker will use the .dynsym entry to
938 determine the address it must put in the global offset table, so
939 both the dynamic object and the regular object will refer to the
940 same memory location for the variable. */
942 s = bfd_get_linker_section (dynobj, ".dynbss");
943 BFD_ASSERT (s != NULL);
945 /* We must generate a R_VAX_COPY reloc to tell the dynamic linker to
946 copy the initial value out of the dynamic object and into the
947 runtime process image. We need to remember the offset into the
948 .rela.bss section we are going to use. */
949 if ((h->root.u.def.section->flags & SEC_ALLOC) != 0 && h->size != 0)
953 srel = bfd_get_linker_section (dynobj, ".rela.bss");
954 BFD_ASSERT (srel != NULL);
955 srel->size += sizeof (Elf32_External_Rela);
959 return _bfd_elf_adjust_dynamic_copy (info, h, s);
962 /* This function is called via elf_link_hash_traverse. It resets GOT
963 and PLT (.GOT) reference counts back to -1 so normal PC32 relocation
967 elf_vax_discard_got_entries (struct elf_link_hash_entry *h,
968 void *infoptr ATTRIBUTE_UNUSED)
970 h->got.refcount = -1;
971 h->plt.refcount = -1;
976 /* Discard unused dynamic data if this is a static link. */
979 elf_vax_always_size_sections (bfd *output_bfd ATTRIBUTE_UNUSED,
980 struct bfd_link_info *info)
985 dynobj = elf_hash_table (info)->dynobj;
987 if (dynobj && !elf_hash_table (info)->dynamic_sections_created)
989 /* We may have created entries in the .rela.got and .got sections.
990 However, if we are not creating the dynamic sections, we will
991 not actually use these entries. Reset the size of .rela.got
992 and .got, which will cause them to get stripped from the output
994 s = elf_hash_table (info)->srelgot;
997 s = elf_hash_table (info)->sgotplt;
1000 s = elf_hash_table (info)->sgot;
1005 /* If this is a static link, we need to discard all the got entries we've
1007 if (!dynobj || !elf_hash_table (info)->dynamic_sections_created)
1008 elf_link_hash_traverse (elf_hash_table (info),
1009 elf_vax_discard_got_entries,
1015 /* Set the sizes of the dynamic sections. */
1018 elf_vax_size_dynamic_sections (bfd *output_bfd, struct bfd_link_info *info)
1024 bfd_boolean reltext;
1026 dynobj = elf_hash_table (info)->dynobj;
1027 BFD_ASSERT (dynobj != NULL);
1029 if (elf_hash_table (info)->dynamic_sections_created)
1031 /* Set the contents of the .interp section to the interpreter. */
1032 if (bfd_link_executable (info) && !info->nointerp)
1034 s = bfd_get_linker_section (dynobj, ".interp");
1035 BFD_ASSERT (s != NULL);
1036 s->size = sizeof ELF_DYNAMIC_INTERPRETER;
1037 s->contents = (unsigned char *) ELF_DYNAMIC_INTERPRETER;
1041 /* If this is a -Bsymbolic shared link, then we need to discard all PC
1042 relative relocs against symbols defined in a regular object. We
1043 allocated space for them in the check_relocs routine, but we will not
1044 fill them in in the relocate_section routine. */
1045 if (bfd_link_pic (info) && info->symbolic)
1046 elf_vax_link_hash_traverse (elf_hash_table (info),
1047 elf_vax_discard_copies,
1050 /* If this is a -Bsymbolic shared link, we need to discard all the got
1051 entries we've recorded. Otherwise, we need to instantiate (allocate
1053 elf_link_hash_traverse (elf_hash_table (info),
1054 elf_vax_instantiate_got_entries,
1057 /* The check_relocs and adjust_dynamic_symbol entry points have
1058 determined the sizes of the various dynamic sections. Allocate
1063 for (s = dynobj->sections; s != NULL; s = s->next)
1067 if ((s->flags & SEC_LINKER_CREATED) == 0)
1070 /* It's OK to base decisions on the section name, because none
1071 of the dynobj section names depend upon the input files. */
1072 name = bfd_get_section_name (dynobj, s);
1074 if (strcmp (name, ".plt") == 0)
1076 /* Remember whether there is a PLT. */
1079 else if (CONST_STRNEQ (name, ".rela"))
1085 /* Remember whether there are any reloc sections other
1087 if (strcmp (name, ".rela.plt") != 0)
1089 const char *outname;
1093 /* If this relocation section applies to a read only
1094 section, then we probably need a DT_TEXTREL
1095 entry. .rela.plt is actually associated with
1096 .got.plt, which is never readonly. */
1097 outname = bfd_get_section_name (output_bfd,
1099 target = bfd_get_section_by_name (output_bfd, outname + 5);
1101 && (target->flags & SEC_READONLY) != 0
1102 && (target->flags & SEC_ALLOC) != 0)
1106 /* We use the reloc_count field as a counter if we need
1107 to copy relocs into the output file. */
1111 else if (! CONST_STRNEQ (name, ".got")
1112 && strcmp (name, ".dynbss") != 0)
1114 /* It's not one of our sections, so don't allocate space. */
1120 /* If we don't need this section, strip it from the
1121 output file. This is mostly to handle .rela.bss and
1122 .rela.plt. We must create both sections in
1123 create_dynamic_sections, because they must be created
1124 before the linker maps input sections to output
1125 sections. The linker does that before
1126 adjust_dynamic_symbol is called, and it is that
1127 function which decides whether anything needs to go
1128 into these sections. */
1129 s->flags |= SEC_EXCLUDE;
1133 if ((s->flags & SEC_HAS_CONTENTS) == 0)
1136 /* Allocate memory for the section contents. */
1137 s->contents = (bfd_byte *) bfd_zalloc (dynobj, s->size);
1138 if (s->contents == NULL)
1142 if (elf_hash_table (info)->dynamic_sections_created)
1144 /* Add some entries to the .dynamic section. We fill in the
1145 values later, in elf_vax_finish_dynamic_sections, but we
1146 must add the entries now so that we get the correct size for
1147 the .dynamic section. The DT_DEBUG entry is filled in by the
1148 dynamic linker and used by the debugger. */
1149 #define add_dynamic_entry(TAG, VAL) \
1150 _bfd_elf_add_dynamic_entry (info, TAG, VAL)
1152 if (!bfd_link_pic (info))
1154 if (!add_dynamic_entry (DT_DEBUG, 0))
1160 if (!add_dynamic_entry (DT_PLTGOT, 0)
1161 || !add_dynamic_entry (DT_PLTRELSZ, 0)
1162 || !add_dynamic_entry (DT_PLTREL, DT_RELA)
1163 || !add_dynamic_entry (DT_JMPREL, 0))
1169 if (!add_dynamic_entry (DT_RELA, 0)
1170 || !add_dynamic_entry (DT_RELASZ, 0)
1171 || !add_dynamic_entry (DT_RELAENT, sizeof (Elf32_External_Rela)))
1175 if (reltext || (info->flags & DF_TEXTREL) != 0)
1177 if (!add_dynamic_entry (DT_TEXTREL, 0))
1181 #undef add_dynamic_entry
1186 /* This function is called via elf_vax_link_hash_traverse if we are
1187 creating a shared object with -Bsymbolic. It discards the space
1188 allocated to copy PC relative relocs against symbols which are defined
1189 in regular objects. We allocated space for them in the check_relocs
1190 routine, but we won't fill them in in the relocate_section routine. */
1193 elf_vax_discard_copies (struct elf_vax_link_hash_entry *h,
1194 void * ignore ATTRIBUTE_UNUSED)
1196 struct elf_vax_pcrel_relocs_copied *s;
1198 /* We only discard relocs for symbols defined in a regular object. */
1199 if (!h->root.def_regular)
1202 for (s = h->pcrel_relocs_copied; s != NULL; s = s->next)
1203 s->section->size -= s->count * sizeof (Elf32_External_Rela);
1208 /* This function is called via elf_link_hash_traverse. It looks for
1209 entries that have GOT or PLT (.GOT) references. If creating a shared
1210 object with -Bsymbolic, or the symbol has been forced local, then it
1211 resets the reference count back to -1 so normal PC32 relocation will
1212 be done. Otherwise space in the .got and .rela.got will be reserved
1216 elf_vax_instantiate_got_entries (struct elf_link_hash_entry *h, void * infoptr)
1218 struct bfd_link_info *info = (struct bfd_link_info *) infoptr;
1223 /* We don't care about non-GOT (and non-PLT) entries. */
1224 if (h->got.refcount <= 0 && h->plt.refcount <= 0)
1227 dynobj = elf_hash_table (info)->dynobj;
1228 BFD_ASSERT (dynobj != NULL);
1230 sgot = elf_hash_table (info)->sgot;
1231 srelgot = elf_hash_table (info)->srelgot;
1233 if (SYMBOL_REFERENCES_LOCAL (info, h))
1235 h->got.refcount = -1;
1236 h->plt.refcount = -1;
1238 else if (h->got.refcount > 0)
1240 /* Make sure this symbol is output as a dynamic symbol. */
1241 if (h->dynindx == -1)
1243 if (!bfd_elf_link_record_dynamic_symbol (info, h))
1247 /* Allocate space in the .got and .rela.got sections. */
1249 srelgot->size += sizeof (Elf32_External_Rela);
1255 /* Relocate an VAX ELF section. */
1258 elf_vax_relocate_section (bfd *output_bfd,
1259 struct bfd_link_info *info,
1261 asection *input_section,
1263 Elf_Internal_Rela *relocs,
1264 Elf_Internal_Sym *local_syms,
1265 asection **local_sections)
1267 Elf_Internal_Shdr *symtab_hdr;
1268 struct elf_link_hash_entry **sym_hashes;
1275 Elf_Internal_Rela *rel;
1276 Elf_Internal_Rela *relend;
1278 symtab_hdr = &elf_tdata (input_bfd)->symtab_hdr;
1279 sym_hashes = elf_sym_hashes (input_bfd);
1287 relend = relocs + input_section->reloc_count;
1288 for (; rel < relend; rel++)
1291 reloc_howto_type *howto;
1292 unsigned long r_symndx;
1293 struct elf_link_hash_entry *h;
1294 Elf_Internal_Sym *sym;
1297 bfd_reloc_status_type r;
1299 r_type = ELF32_R_TYPE (rel->r_info);
1300 if (r_type < 0 || r_type >= (int) R_VAX_max)
1302 bfd_set_error (bfd_error_bad_value);
1305 howto = howto_table + r_type;
1307 r_symndx = ELF32_R_SYM (rel->r_info);
1311 if (r_symndx < symtab_hdr->sh_info)
1313 sym = local_syms + r_symndx;
1314 sec = local_sections[r_symndx];
1315 relocation = _bfd_elf_rela_local_sym (output_bfd, sym, &sec, rel);
1319 bfd_boolean unresolved_reloc;
1320 bfd_boolean warned, ignored;
1322 RELOC_FOR_GLOBAL_SYMBOL (info, input_bfd, input_section, rel,
1323 r_symndx, symtab_hdr, sym_hashes,
1325 unresolved_reloc, warned, ignored);
1327 if ((h->root.type == bfd_link_hash_defined
1328 || h->root.type == bfd_link_hash_defweak)
1329 && ((r_type == R_VAX_PLT32
1330 && h->plt.offset != (bfd_vma) -1
1332 && elf_hash_table (info)->dynamic_sections_created)
1333 || (r_type == R_VAX_GOT32
1334 && h->got.offset != (bfd_vma) -1
1336 && elf_hash_table (info)->dynamic_sections_created
1337 && (! bfd_link_pic (info)
1338 || (! info->symbolic && h->dynindx != -1)
1339 || !h->def_regular))
1340 || (bfd_link_pic (info)
1341 && ((! info->symbolic && h->dynindx != -1)
1343 && ((input_section->flags & SEC_ALLOC) != 0
1344 /* DWARF will emit R_VAX_32 relocations in its
1345 sections against symbols defined externally
1346 in shared libraries. We can't do anything
1349 || ((input_section->flags & SEC_DEBUGGING) != 0
1351 && (r_type == R_VAX_8
1352 || r_type == R_VAX_16
1353 || r_type == R_VAX_32))))
1354 /* In these cases, we don't need the relocation
1355 value. We check specially because in some
1356 obscure cases sec->output_section will be NULL. */
1360 if (sec != NULL && discarded_section (sec))
1361 RELOC_AGAINST_DISCARDED_SECTION (info, input_bfd, input_section,
1362 rel, 1, relend, howto, 0, contents);
1364 if (bfd_link_relocatable (info))
1370 /* Relocation is to the address of the entry for this symbol
1371 in the global offset table. */
1373 /* Resolve a GOTxx reloc against a local symbol directly,
1374 without using the global offset table. */
1376 || h->got.offset == (bfd_vma) -1)
1382 sgot = elf_hash_table (info)->sgot;
1383 BFD_ASSERT (sgot != NULL);
1385 off = h->got.offset;
1386 BFD_ASSERT (off < sgot->size);
1388 bfd_put_32 (output_bfd, rel->r_addend, sgot->contents + off);
1390 relocation = sgot->output_offset + off;
1391 /* The GOT relocation uses the addend. */
1394 /* Change the reference to be indirect. */
1395 contents[rel->r_offset - 1] |= 0x10;
1396 relocation += sgot->output_section->vma;
1401 /* If we are creating an executable and the function this
1402 reloc refers to is in a shared lib, then we made a PLT
1403 entry for this symbol and need to handle the reloc like
1405 if (bfd_link_pic (info))
1406 goto r_vax_pc32_shared;
1409 /* Relocation is to the entry for this symbol in the
1410 procedure linkage table. */
1412 /* Resolve a PLTxx reloc against a local symbol directly,
1413 without using the procedure linkage table. */
1415 || h->plt.offset == (bfd_vma) -1)
1418 splt = elf_hash_table (info)->splt;
1419 BFD_ASSERT (splt != NULL);
1421 sgotplt = elf_hash_table (info)->sgotplt;
1422 BFD_ASSERT (sgotplt != NULL);
1424 plt_index = h->plt.offset / PLT_ENTRY_SIZE - 1;
1426 /* Get the offset into the .got table of the entry that
1427 corresponds to this function. Each .got entry is 4 bytes.
1428 The first two are reserved. */
1429 got_offset = (plt_index + 3) * 4;
1431 /* We want the relocation to point into the .got.plt instead
1432 of the plt itself. */
1433 relocation = (sgotplt->output_section->vma
1434 + sgotplt->output_offset
1436 contents[rel->r_offset-1] |= 0x10; /* make indirect */
1437 if (rel->r_addend == 2)
1441 else if (rel->r_addend != 0)
1443 /* xgettext:c-format */
1444 (_("%pB: warning: PLT addend of %" PRId64 " to `%s'"
1445 " from %pA section ignored"),
1446 input_bfd, (int64_t) rel->r_addend, h->root.root.string,
1456 || ELF_ST_VISIBILITY (h->other) != STV_DEFAULT
1463 if (bfd_link_pic (info)
1464 && r_symndx != STN_UNDEF
1465 && (input_section->flags & SEC_ALLOC) != 0
1466 && ((r_type != R_VAX_PC8
1467 && r_type != R_VAX_PC16
1468 && r_type != R_VAX_PC32)
1469 || ((input_section->flags & SEC_CODE)
1471 || (!h->def_regular && h->type != STT_SECTION)))))
1473 Elf_Internal_Rela outrel;
1475 bfd_boolean skip, relocate;
1477 /* When generating a shared object, these relocations
1478 are copied into the output file to be resolved at run
1482 sreloc = _bfd_elf_get_dynamic_reloc_section
1483 (input_bfd, input_section, /*rela?*/ TRUE);
1492 _bfd_elf_section_offset (output_bfd, info, input_section,
1494 if (outrel.r_offset == (bfd_vma) -1)
1496 if (outrel.r_offset == (bfd_vma) -2)
1497 skip = TRUE, relocate = TRUE;
1498 outrel.r_offset += (input_section->output_section->vma
1499 + input_section->output_offset);
1502 memset (&outrel, 0, sizeof outrel);
1503 /* h->dynindx may be -1 if the symbol was marked to
1506 && ((! info->symbolic && h->dynindx != -1)
1507 || !h->def_regular))
1509 BFD_ASSERT (h->dynindx != -1);
1510 outrel.r_info = ELF32_R_INFO (h->dynindx, r_type);
1511 outrel.r_addend = relocation + rel->r_addend;
1515 if (r_type == R_VAX_32)
1518 outrel.r_info = ELF32_R_INFO (0, R_VAX_RELATIVE);
1519 BFD_ASSERT (bfd_get_signed_32 (input_bfd,
1520 &contents[rel->r_offset]) == 0);
1521 outrel.r_addend = relocation + rel->r_addend;
1527 if (bfd_is_abs_section (sec))
1529 else if (sec == NULL || sec->owner == NULL)
1531 bfd_set_error (bfd_error_bad_value);
1538 /* We are turning this relocation into one
1539 against a section symbol. It would be
1540 proper to subtract the symbol's value,
1541 osec->vma, from the emitted reloc addend,
1542 but ld.so expects buggy relocs. */
1543 osec = sec->output_section;
1544 indx = elf_section_data (osec)->dynindx;
1547 struct elf_link_hash_table *htab;
1548 htab = elf_hash_table (info);
1549 osec = htab->text_index_section;
1550 indx = elf_section_data (osec)->dynindx;
1552 BFD_ASSERT (indx != 0);
1555 outrel.r_info = ELF32_R_INFO (indx, r_type);
1556 outrel.r_addend = relocation + rel->r_addend;
1560 if ((input_section->flags & SEC_CODE) != 0
1561 || (ELF32_R_TYPE (outrel.r_info) != R_VAX_32
1562 && ELF32_R_TYPE (outrel.r_info) != R_VAX_RELATIVE
1563 && ELF32_R_TYPE (outrel.r_info) != R_VAX_COPY
1564 && ELF32_R_TYPE (outrel.r_info) != R_VAX_JMP_SLOT
1565 && ELF32_R_TYPE (outrel.r_info) != R_VAX_GLOB_DAT))
1569 /* xgettext:c-format */
1570 (_("%pB: warning: %s relocation against symbol `%s'"
1571 " from %pA section"),
1572 input_bfd, howto->name, h->root.root.string,
1576 /* xgettext:c-format */
1577 (_("%pB: warning: %s relocation to %#" PRIx64
1578 " from %pA section"),
1579 input_bfd, howto->name, (uint64_t) outrel.r_addend,
1582 loc = sreloc->contents;
1583 loc += sreloc->reloc_count++ * sizeof (Elf32_External_Rela);
1584 bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc);
1586 /* This reloc will be computed at runtime, so there's no
1587 need to do anything now, except for R_VAX_32
1588 relocations that have been turned into
1596 case R_VAX_GNU_VTINHERIT:
1597 case R_VAX_GNU_VTENTRY:
1598 /* These are no-ops in the end. */
1605 /* VAX PCREL relocations are from the end of relocation, not the start.
1606 So subtract the difference from the relocation amount since we can't
1607 add it to the offset. */
1608 if (howto->pc_relative && howto->pcrel_offset)
1609 relocation -= bfd_get_reloc_size(howto);
1611 r = _bfd_final_link_relocate (howto, input_bfd, input_section,
1612 contents, rel->r_offset,
1613 relocation, rel->r_addend);
1615 if (r != bfd_reloc_ok)
1620 case bfd_reloc_outofrange:
1622 case bfd_reloc_overflow:
1630 name = bfd_elf_string_from_elf_section (input_bfd,
1631 symtab_hdr->sh_link,
1636 name = bfd_section_name (input_bfd, sec);
1638 info->callbacks->reloc_overflow
1639 (info, (h ? &h->root : NULL), name, howto->name,
1640 (bfd_vma) 0, input_bfd, input_section, rel->r_offset);
1650 /* Finish up dynamic symbol handling. We set the contents of various
1651 dynamic sections here. */
1654 elf_vax_finish_dynamic_symbol (bfd *output_bfd, struct bfd_link_info *info,
1655 struct elf_link_hash_entry *h,
1656 Elf_Internal_Sym *sym)
1660 dynobj = elf_hash_table (info)->dynobj;
1662 if (h->plt.offset != (bfd_vma) -1)
1670 Elf_Internal_Rela rela;
1673 /* This symbol has an entry in the procedure linkage table. Set
1675 BFD_ASSERT (h->dynindx != -1);
1677 splt = elf_hash_table (info)->splt;
1678 sgot = elf_hash_table (info)->sgotplt;
1679 srela = elf_hash_table (info)->srelplt;
1680 BFD_ASSERT (splt != NULL && sgot != NULL && srela != NULL);
1682 addend = 2 * (h->plt.offset & 1);
1683 h->plt.offset &= ~1;
1685 /* Get the index in the procedure linkage table which
1686 corresponds to this symbol. This is the index of this symbol
1687 in all the symbols for which we are making plt entries. The
1688 first entry in the procedure linkage table is reserved. */
1689 plt_index = h->plt.offset / PLT_ENTRY_SIZE - 1;
1691 /* Get the offset into the .got table of the entry that
1692 corresponds to this function. Each .got entry is 4 bytes.
1693 The first two are reserved. */
1694 got_offset = (plt_index + 3) * 4;
1696 /* Fill in the entry in the procedure linkage table. */
1697 memcpy (splt->contents + h->plt.offset, elf_vax_plt_entry,
1700 /* The offset is relative to the first extension word. */
1701 bfd_put_32 (output_bfd,
1702 -(h->plt.offset + 8),
1703 splt->contents + h->plt.offset + 4);
1705 bfd_put_32 (output_bfd, plt_index * sizeof (Elf32_External_Rela),
1706 splt->contents + h->plt.offset + 8);
1708 /* Fill in the entry in the global offset table. */
1709 bfd_put_32 (output_bfd,
1710 (splt->output_section->vma
1711 + splt->output_offset
1712 + h->plt.offset) + addend,
1713 sgot->contents + got_offset);
1715 /* Fill in the entry in the .rela.plt section. */
1716 rela.r_offset = (sgot->output_section->vma
1717 + sgot->output_offset
1719 rela.r_info = ELF32_R_INFO (h->dynindx, R_VAX_JMP_SLOT);
1720 rela.r_addend = addend;
1721 loc = srela->contents + plt_index * sizeof (Elf32_External_Rela);
1722 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
1724 if (!h->def_regular)
1726 /* Mark the symbol as undefined, rather than as defined in
1727 the .plt section. Leave the value alone. */
1728 sym->st_shndx = SHN_UNDEF;
1732 if (h->got.offset != (bfd_vma) -1)
1736 Elf_Internal_Rela rela;
1739 /* This symbol has an entry in the global offset table. Set it
1741 sgot = elf_hash_table (info)->sgot;
1742 srela = elf_hash_table (info)->srelgot;
1743 BFD_ASSERT (sgot != NULL && srela != NULL);
1745 rela.r_offset = (sgot->output_section->vma
1746 + sgot->output_offset
1748 rela.r_info = ELF32_R_INFO (h->dynindx, R_VAX_GLOB_DAT);
1749 rela.r_addend = bfd_get_signed_32 (output_bfd,
1750 sgot->contents + h->got.offset);
1752 loc = srela->contents;
1753 loc += srela->reloc_count++ * sizeof (Elf32_External_Rela);
1754 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
1760 Elf_Internal_Rela rela;
1763 /* This symbol needs a copy reloc. Set it up. */
1764 BFD_ASSERT (h->dynindx != -1
1765 && (h->root.type == bfd_link_hash_defined
1766 || h->root.type == bfd_link_hash_defweak));
1768 s = bfd_get_linker_section (dynobj, ".rela.bss");
1769 BFD_ASSERT (s != NULL);
1771 rela.r_offset = (h->root.u.def.value
1772 + h->root.u.def.section->output_section->vma
1773 + h->root.u.def.section->output_offset);
1774 rela.r_info = ELF32_R_INFO (h->dynindx, R_VAX_COPY);
1776 loc = s->contents + s->reloc_count++ * sizeof (Elf32_External_Rela);
1777 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
1780 /* Mark _DYNAMIC and _GLOBAL_OFFSET_TABLE_ as absolute. */
1781 if (h == elf_hash_table (info)->hdynamic
1782 || h == elf_hash_table (info)->hgot)
1783 sym->st_shndx = SHN_ABS;
1788 /* Finish up the dynamic sections. */
1791 elf_vax_finish_dynamic_sections (bfd *output_bfd, struct bfd_link_info *info)
1797 dynobj = elf_hash_table (info)->dynobj;
1799 sgot = elf_hash_table (info)->sgotplt;
1800 BFD_ASSERT (sgot != NULL);
1801 sdyn = bfd_get_linker_section (dynobj, ".dynamic");
1803 if (elf_hash_table (info)->dynamic_sections_created)
1806 Elf32_External_Dyn *dyncon, *dynconend;
1808 splt = elf_hash_table (info)->splt;
1809 BFD_ASSERT (splt != NULL && sdyn != NULL);
1811 dyncon = (Elf32_External_Dyn *) sdyn->contents;
1812 dynconend = (Elf32_External_Dyn *) (sdyn->contents + sdyn->size);
1813 for (; dyncon < dynconend; dyncon++)
1815 Elf_Internal_Dyn dyn;
1818 bfd_elf32_swap_dyn_in (dynobj, dyncon, &dyn);
1826 s = elf_hash_table (info)->sgotplt;
1829 s = elf_hash_table (info)->srelplt;
1831 dyn.d_un.d_ptr = s->output_section->vma + s->output_offset;
1832 bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon);
1836 s = elf_hash_table (info)->srelplt;
1837 dyn.d_un.d_val = s->size;
1838 bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon);
1843 /* Fill in the first entry in the procedure linkage table. */
1846 memcpy (splt->contents, elf_vax_plt0_entry, PLT_ENTRY_SIZE);
1847 bfd_put_32 (output_bfd,
1848 (sgot->output_section->vma
1849 + sgot->output_offset + 4
1850 - (splt->output_section->vma + 6)),
1851 splt->contents + 2);
1852 bfd_put_32 (output_bfd,
1853 (sgot->output_section->vma
1854 + sgot->output_offset + 8
1855 - (splt->output_section->vma + 12)),
1856 splt->contents + 8);
1857 elf_section_data (splt->output_section)->this_hdr.sh_entsize
1862 /* Fill in the first three entries in the global offset table. */
1866 bfd_put_32 (output_bfd, (bfd_vma) 0, sgot->contents);
1868 bfd_put_32 (output_bfd,
1869 sdyn->output_section->vma + sdyn->output_offset,
1871 bfd_put_32 (output_bfd, (bfd_vma) 0, sgot->contents + 4);
1872 bfd_put_32 (output_bfd, (bfd_vma) 0, sgot->contents + 8);
1875 if (elf_section_data (sgot->output_section) != NULL)
1876 elf_section_data (sgot->output_section)->this_hdr.sh_entsize = 4;
1881 static enum elf_reloc_type_class
1882 elf_vax_reloc_type_class (const struct bfd_link_info *info ATTRIBUTE_UNUSED,
1883 const asection *rel_sec ATTRIBUTE_UNUSED,
1884 const Elf_Internal_Rela *rela)
1886 switch ((int) ELF32_R_TYPE (rela->r_info))
1888 case R_VAX_RELATIVE:
1889 return reloc_class_relative;
1890 case R_VAX_JMP_SLOT:
1891 return reloc_class_plt;
1893 return reloc_class_copy;
1895 return reloc_class_normal;
1900 elf_vax_plt_sym_val (bfd_vma i, const asection *plt,
1901 const arelent *rel ATTRIBUTE_UNUSED)
1903 return plt->vma + (i + 1) * PLT_ENTRY_SIZE;
1906 #define TARGET_LITTLE_SYM vax_elf32_vec
1907 #define TARGET_LITTLE_NAME "elf32-vax"
1908 #define ELF_MACHINE_CODE EM_VAX
1909 #define ELF_MAXPAGESIZE 0x1000
1911 #define elf_backend_create_dynamic_sections \
1912 _bfd_elf_create_dynamic_sections
1913 #define bfd_elf32_bfd_link_hash_table_create \
1914 elf_vax_link_hash_table_create
1915 #define bfd_elf32_bfd_final_link bfd_elf_gc_common_final_link
1917 #define elf_backend_check_relocs elf_vax_check_relocs
1918 #define elf_backend_adjust_dynamic_symbol \
1919 elf_vax_adjust_dynamic_symbol
1920 #define elf_backend_always_size_sections \
1921 elf_vax_always_size_sections
1922 #define elf_backend_size_dynamic_sections \
1923 elf_vax_size_dynamic_sections
1924 #define elf_backend_init_index_section _bfd_elf_init_1_index_section
1925 #define elf_backend_relocate_section elf_vax_relocate_section
1926 #define elf_backend_finish_dynamic_symbol \
1927 elf_vax_finish_dynamic_symbol
1928 #define elf_backend_finish_dynamic_sections \
1929 elf_vax_finish_dynamic_sections
1930 #define elf_backend_reloc_type_class elf_vax_reloc_type_class
1931 #define elf_backend_gc_mark_hook elf_vax_gc_mark_hook
1932 #define elf_backend_plt_sym_val elf_vax_plt_sym_val
1933 #define bfd_elf32_bfd_merge_private_bfd_data \
1934 elf32_vax_merge_private_bfd_data
1935 #define bfd_elf32_bfd_set_private_flags \
1936 elf32_vax_set_private_flags
1937 #define bfd_elf32_bfd_print_private_bfd_data \
1938 elf32_vax_print_private_bfd_data
1940 #define elf_backend_can_gc_sections 1
1941 #define elf_backend_want_got_plt 1
1942 #define elf_backend_plt_readonly 1
1943 #define elf_backend_want_plt_sym 0
1944 #define elf_backend_got_header_size 16
1945 #define elf_backend_rela_normal 1
1946 #define elf_backend_dtrel_excludes_plt 1
1948 #include "elf32-target.h"