1 /* VAX series support for 32-bit ELF
2 Copyright (C) 1993-2016 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 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 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 (_("%B: unrecognised VAX reloc number: %d"),
292 bfd_set_error (bfd_error_bad_value);
295 cache_ptr->howto = &howto_table[r_type];
298 #define elf_info_to_howto rtype_to_howto
302 bfd_reloc_code_real_type bfd_val;
305 { BFD_RELOC_NONE, R_VAX_NONE },
306 { BFD_RELOC_32, R_VAX_32 },
307 { BFD_RELOC_16, R_VAX_16 },
308 { BFD_RELOC_8, R_VAX_8 },
309 { BFD_RELOC_32_PCREL, R_VAX_PC32 },
310 { BFD_RELOC_16_PCREL, R_VAX_PC16 },
311 { BFD_RELOC_8_PCREL, R_VAX_PC8 },
312 { BFD_RELOC_32_GOT_PCREL, R_VAX_GOT32 },
313 { BFD_RELOC_32_PLT_PCREL, R_VAX_PLT32 },
314 { BFD_RELOC_NONE, R_VAX_COPY },
315 { BFD_RELOC_VAX_GLOB_DAT, R_VAX_GLOB_DAT },
316 { BFD_RELOC_VAX_JMP_SLOT, R_VAX_JMP_SLOT },
317 { BFD_RELOC_VAX_RELATIVE, R_VAX_RELATIVE },
318 { BFD_RELOC_CTOR, R_VAX_32 },
319 { BFD_RELOC_VTABLE_INHERIT, R_VAX_GNU_VTINHERIT },
320 { BFD_RELOC_VTABLE_ENTRY, R_VAX_GNU_VTENTRY },
323 static reloc_howto_type *
324 reloc_type_lookup (bfd *abfd ATTRIBUTE_UNUSED, bfd_reloc_code_real_type code)
327 for (i = 0; i < sizeof (reloc_map) / sizeof (reloc_map[0]); i++)
329 if (reloc_map[i].bfd_val == code)
330 return &howto_table[reloc_map[i].elf_val];
335 static reloc_howto_type *
336 reloc_name_lookup (bfd *abfd ATTRIBUTE_UNUSED,
341 for (i = 0; i < sizeof (howto_table) / sizeof (howto_table[0]); i++)
342 if (howto_table[i].name != NULL
343 && strcasecmp (howto_table[i].name, r_name) == 0)
344 return &howto_table[i];
349 #define bfd_elf32_bfd_reloc_type_lookup reloc_type_lookup
350 #define bfd_elf32_bfd_reloc_name_lookup reloc_name_lookup
351 #define ELF_ARCH bfd_arch_vax
352 /* end code generated by elf.el */
354 /* Functions for the VAX ELF linker. */
356 /* The name of the dynamic interpreter. This is put in the .interp
359 #define ELF_DYNAMIC_INTERPRETER "/usr/libexec/ld.elf_so"
361 /* The size in bytes of an entry in the procedure linkage table. */
363 #define PLT_ENTRY_SIZE 12
365 /* The first entry in a procedure linkage table looks like this. See
366 the SVR4 ABI VAX supplement to see how this works. */
368 static const bfd_byte elf_vax_plt0_entry[PLT_ENTRY_SIZE] =
370 0xdd, 0xef, /* pushl l^ */
371 0, 0, 0, 0, /* offset to .plt.got + 4 */
372 0x17, 0xff, /* jmp @L^(pc) */
373 0, 0, 0, 0, /* offset to .plt.got + 8 */
376 /* Subsequent entries in a procedure linkage table look like this. */
378 static const bfd_byte elf_vax_plt_entry[PLT_ENTRY_SIZE] =
380 0xfc, 0x0f, /* .word ^M<r11:r2> */
381 0x16, 0xef, /* jsb L^(pc) */
382 0, 0, 0, 0, /* replaced with offset to start of .plt */
383 0, 0, 0, 0, /* index into .rela.plt */
386 /* The VAX linker needs to keep track of the number of relocs that it
387 decides to copy in check_relocs for each symbol. This is so that it
388 can discard PC relative relocs if it doesn't need them when linking
389 with -Bsymbolic. We store the information in a field extending the
390 regular ELF linker hash table. */
392 /* This structure keeps track of the number of PC relative relocs we have
393 copied for a given symbol. */
395 struct elf_vax_pcrel_relocs_copied
398 struct elf_vax_pcrel_relocs_copied *next;
399 /* A section in dynobj. */
401 /* Number of relocs copied in this section. */
405 /* VAX ELF linker hash entry. */
407 struct elf_vax_link_hash_entry
409 struct elf_link_hash_entry root;
411 /* Number of PC relative relocs copied for this symbol. */
412 struct elf_vax_pcrel_relocs_copied *pcrel_relocs_copied;
417 /* Declare this now that the above structures are defined. */
419 static bfd_boolean elf_vax_discard_copies (struct elf_vax_link_hash_entry *,
422 /* Declare this now that the above structures are defined. */
424 static bfd_boolean elf_vax_instantiate_got_entries (struct elf_link_hash_entry *,
427 /* Traverse an VAX ELF linker hash table. */
429 #define elf_vax_link_hash_traverse(table, func, info) \
430 (elf_link_hash_traverse \
432 (bfd_boolean (*) (struct elf_link_hash_entry *, void *)) (func), \
435 /* Create an entry in an VAX ELF linker hash table. */
437 static struct bfd_hash_entry *
438 elf_vax_link_hash_newfunc (struct bfd_hash_entry *entry,
439 struct bfd_hash_table *table,
442 struct elf_vax_link_hash_entry *ret =
443 (struct elf_vax_link_hash_entry *) entry;
445 /* Allocate the structure if it has not already been allocated by a
448 ret = ((struct elf_vax_link_hash_entry *)
449 bfd_hash_allocate (table,
450 sizeof (struct elf_vax_link_hash_entry)));
452 return (struct bfd_hash_entry *) ret;
454 /* Call the allocation method of the superclass. */
455 ret = ((struct elf_vax_link_hash_entry *)
456 _bfd_elf_link_hash_newfunc ((struct bfd_hash_entry *) ret,
460 ret->pcrel_relocs_copied = NULL;
463 return (struct bfd_hash_entry *) ret;
466 /* Create an VAX ELF linker hash table. */
468 static struct bfd_link_hash_table *
469 elf_vax_link_hash_table_create (bfd *abfd)
471 struct elf_link_hash_table *ret;
472 bfd_size_type amt = sizeof (struct elf_link_hash_table);
474 ret = bfd_zmalloc (amt);
478 if (!_bfd_elf_link_hash_table_init (ret, abfd,
479 elf_vax_link_hash_newfunc,
480 sizeof (struct elf_vax_link_hash_entry),
490 /* Keep vax-specific flags in the ELF header */
492 elf32_vax_set_private_flags (bfd *abfd, flagword flags)
494 elf_elfheader (abfd)->e_flags = flags;
495 elf_flags_init (abfd) = TRUE;
499 /* Merge backend specific data from an object file to the output
500 object file when linking. */
502 elf32_vax_merge_private_bfd_data (bfd *ibfd, struct bfd_link_info *info)
504 bfd *obfd = info->output_bfd;
507 if ( bfd_get_flavour (ibfd) != bfd_target_elf_flavour
508 || bfd_get_flavour (obfd) != bfd_target_elf_flavour)
511 in_flags = elf_elfheader (ibfd)->e_flags;
513 if (!elf_flags_init (obfd))
515 elf_flags_init (obfd) = TRUE;
516 elf_elfheader (obfd)->e_flags = in_flags;
522 /* Display the flags field */
524 elf32_vax_print_private_bfd_data (bfd *abfd, void * ptr)
526 FILE *file = (FILE *) ptr;
528 BFD_ASSERT (abfd != NULL && ptr != NULL);
530 /* Print normal ELF private data. */
531 _bfd_elf_print_private_bfd_data (abfd, ptr);
533 /* Ignore init flag - it may not be set, despite the flags field containing valid data. */
535 /* xgettext:c-format */
536 fprintf (file, _("private flags = %lx:"), elf_elfheader (abfd)->e_flags);
538 if (elf_elfheader (abfd)->e_flags & EF_VAX_NONPIC)
539 fprintf (file, _(" [nonpic]"));
541 if (elf_elfheader (abfd)->e_flags & EF_VAX_DFLOAT)
542 fprintf (file, _(" [d-float]"));
544 if (elf_elfheader (abfd)->e_flags & EF_VAX_GFLOAT)
545 fprintf (file, _(" [g-float]"));
551 /* Look through the relocs for a section during the first phase, and
552 allocate space in the global offset table or procedure linkage
556 elf_vax_check_relocs (bfd *abfd, struct bfd_link_info *info, asection *sec,
557 const Elf_Internal_Rela *relocs)
560 Elf_Internal_Shdr *symtab_hdr;
561 struct elf_link_hash_entry **sym_hashes;
562 const Elf_Internal_Rela *rel;
563 const Elf_Internal_Rela *rel_end;
566 if (bfd_link_relocatable (info))
569 dynobj = elf_hash_table (info)->dynobj;
570 symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
571 sym_hashes = elf_sym_hashes (abfd);
575 rel_end = relocs + sec->reloc_count;
576 for (rel = relocs; rel < rel_end; rel++)
578 unsigned long r_symndx;
579 struct elf_link_hash_entry *h;
581 r_symndx = ELF32_R_SYM (rel->r_info);
583 if (r_symndx < symtab_hdr->sh_info)
587 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
588 while (h->root.type == bfd_link_hash_indirect
589 || h->root.type == bfd_link_hash_warning)
590 h = (struct elf_link_hash_entry *) h->root.u.i.link;
592 /* PR15323, ref flags aren't set for references in the same
594 h->root.non_ir_ref = 1;
597 switch (ELF32_R_TYPE (rel->r_info))
600 BFD_ASSERT (h != NULL);
602 /* If this is a local symbol, we resolve it directly without
603 creating a global offset table entry. */
605 || h == elf_hash_table (info)->hgot
606 || h == elf_hash_table (info)->hplt)
609 /* This symbol requires a global offset table entry. */
613 /* Create the .got section. */
614 elf_hash_table (info)->dynobj = dynobj = abfd;
615 if (!_bfd_elf_create_got_section (dynobj, info))
621 struct elf_vax_link_hash_entry *eh;
623 eh = (struct elf_vax_link_hash_entry *) h;
624 if (h->got.refcount == -1)
627 eh->got_addend = rel->r_addend;
632 if (eh->got_addend != (bfd_vma) rel->r_addend)
634 /* xgettext:c-format */
635 (_("%s: warning: GOT addend of %ld to `%s' does"
636 " not match previous GOT addend of %ld"),
637 bfd_get_filename (abfd), rel->r_addend,
646 /* This symbol requires a procedure linkage table entry. We
647 actually build the entry in adjust_dynamic_symbol,
648 because this might be a case of linking PIC code which is
649 never referenced by a dynamic object, in which case we
650 don't need to generate a procedure linkage table entry
652 BFD_ASSERT (h != NULL);
654 /* If this is a local symbol, we resolve it directly without
655 creating a procedure linkage table entry. */
660 if (h->plt.refcount == -1)
669 /* If we are creating a shared library and this is not a local
670 symbol, we need to copy the reloc into the shared library.
671 However when linking with -Bsymbolic and this is a global
672 symbol which is defined in an object we are including in the
673 link (i.e., DEF_REGULAR is set), then we can resolve the
674 reloc directly. At this point we have not seen all the input
675 files, so it is possible that DEF_REGULAR is not set now but
676 will be set later (it is never cleared). We account for that
677 possibility below by storing information in the
678 pcrel_relocs_copied field of the hash table entry. */
679 if (!(bfd_link_pic (info)
680 && (sec->flags & SEC_ALLOC) != 0
683 || !h->def_regular)))
686 && ELF_ST_VISIBILITY (h->other) == STV_DEFAULT
689 /* Make sure a plt entry is created for this symbol if
690 it turns out to be a function defined by a dynamic
692 if (h->plt.refcount == -1)
699 /* If this is a local symbol, we can resolve it directly. */
701 && (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT
709 if (h != NULL && ELF_ST_VISIBILITY (h->other) == STV_DEFAULT)
711 /* Make sure a plt entry is created for this symbol if it
712 turns out to be a function defined by a dynamic object. */
713 if (h->plt.refcount == -1)
719 /* If we are creating a shared library, we need to copy the
720 reloc into the shared library. */
721 if (bfd_link_pic (info)
722 && (sec->flags & SEC_ALLOC) != 0)
724 /* When creating a shared object, we must copy these
725 reloc types into the output file. We create a reloc
726 section in dynobj and make room for this reloc. */
729 sreloc = _bfd_elf_make_dynamic_reloc_section
730 (sec, dynobj, 2, abfd, /*rela?*/ TRUE);
735 if (sec->flags & SEC_READONLY)
736 info->flags |= DF_TEXTREL;
739 sreloc->size += sizeof (Elf32_External_Rela);
741 /* If we are linking with -Bsymbolic, we count the number of
742 PC relative relocations we have entered for this symbol,
743 so that we can discard them again if the symbol is later
744 defined by a regular object. Note that this function is
745 only called if we are using a vaxelf linker hash table,
746 which means that h is really a pointer to an
747 elf_vax_link_hash_entry. */
748 if ((ELF32_R_TYPE (rel->r_info) == R_VAX_PC8
749 || ELF32_R_TYPE (rel->r_info) == R_VAX_PC16
750 || ELF32_R_TYPE (rel->r_info) == R_VAX_PC32)
753 struct elf_vax_link_hash_entry *eh;
754 struct elf_vax_pcrel_relocs_copied *p;
756 eh = (struct elf_vax_link_hash_entry *) h;
758 for (p = eh->pcrel_relocs_copied; p != NULL; p = p->next)
759 if (p->section == sreloc)
764 p = ((struct elf_vax_pcrel_relocs_copied *)
765 bfd_alloc (dynobj, (bfd_size_type) sizeof *p));
768 p->next = eh->pcrel_relocs_copied;
769 eh->pcrel_relocs_copied = p;
780 /* This relocation describes the C++ object vtable hierarchy.
781 Reconstruct it for later use during GC. */
782 case R_VAX_GNU_VTINHERIT:
783 if (!bfd_elf_gc_record_vtinherit (abfd, sec, h, rel->r_offset))
787 /* This relocation describes which C++ vtable entries are actually
788 used. Record for later use during GC. */
789 case R_VAX_GNU_VTENTRY:
790 BFD_ASSERT (h != NULL);
792 && !bfd_elf_gc_record_vtentry (abfd, sec, h, rel->r_addend))
804 /* Return the section that should be marked against GC for a given
808 elf_vax_gc_mark_hook (asection *sec,
809 struct bfd_link_info *info,
810 Elf_Internal_Rela *rel,
811 struct elf_link_hash_entry *h,
812 Elf_Internal_Sym *sym)
815 switch (ELF32_R_TYPE (rel->r_info))
817 case R_VAX_GNU_VTINHERIT:
818 case R_VAX_GNU_VTENTRY:
822 return _bfd_elf_gc_mark_hook (sec, info, rel, h, sym);
825 /* Update the got entry reference counts for the section being removed. */
828 elf_vax_gc_sweep_hook (bfd *abfd, struct bfd_link_info *info, asection *sec,
829 const Elf_Internal_Rela *relocs)
831 Elf_Internal_Shdr *symtab_hdr;
832 struct elf_link_hash_entry **sym_hashes;
833 const Elf_Internal_Rela *rel, *relend;
836 if (bfd_link_relocatable (info))
839 dynobj = elf_hash_table (info)->dynobj;
843 symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
844 sym_hashes = elf_sym_hashes (abfd);
846 relend = relocs + sec->reloc_count;
847 for (rel = relocs; rel < relend; rel++)
849 unsigned long r_symndx;
850 struct elf_link_hash_entry *h = NULL;
852 r_symndx = ELF32_R_SYM (rel->r_info);
853 if (r_symndx >= symtab_hdr->sh_info)
855 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
856 while (h->root.type == bfd_link_hash_indirect
857 || h->root.type == bfd_link_hash_warning)
858 h = (struct elf_link_hash_entry *) h->root.u.i.link;
861 switch (ELF32_R_TYPE (rel->r_info))
864 if (h != NULL && h->got.refcount > 0)
875 if (h != NULL && h->plt.refcount > 0)
887 /* Adjust a symbol defined by a dynamic object and referenced by a
888 regular object. The current definition is in some section of the
889 dynamic object, but we're not including those sections. We have to
890 change the definition to something the rest of the link can
894 elf_vax_adjust_dynamic_symbol (struct bfd_link_info *info,
895 struct elf_link_hash_entry *h)
900 dynobj = elf_hash_table (info)->dynobj;
902 /* Make sure we know what is going on here. */
903 BFD_ASSERT (dynobj != NULL
905 || h->u.weakdef != NULL
908 && !h->def_regular)));
910 /* If this is a function, put it in the procedure linkage table. We
911 will fill in the contents of the procedure linkage table later,
912 when we know the address of the .got section. */
913 if (h->type == STT_FUNC
916 if (h->plt.refcount <= 0
917 || SYMBOL_CALLS_LOCAL (info, h)
918 || (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT
919 && h->root.type == bfd_link_hash_undefweak))
921 /* This case can occur if we saw a PLTxx reloc in an input
922 file, but the symbol was never referred to by a dynamic
923 object, or if all references were garbage collected. In
924 such a case, we don't actually need to build a procedure
925 linkage table, and we can just do a PCxx reloc instead. */
926 h->plt.offset = (bfd_vma) -1;
931 s = elf_hash_table (info)->splt;
932 BFD_ASSERT (s != NULL);
934 /* If this is the first .plt entry, make room for the special
938 s->size += PLT_ENTRY_SIZE;
941 /* If this symbol is not defined in a regular file, and we are
942 not generating a shared library, then set the symbol to this
943 location in the .plt. This is required to make function
944 pointers compare as equal between the normal executable and
945 the shared library. */
946 if (!bfd_link_pic (info)
949 h->root.u.def.section = s;
950 h->root.u.def.value = s->size;
953 h->plt.offset = s->size;
955 /* Make room for this entry. */
956 s->size += PLT_ENTRY_SIZE;
958 /* We also need to make an entry in the .got.plt section, which
959 will be placed in the .got section by the linker script. */
961 s = elf_hash_table (info)->sgotplt;
962 BFD_ASSERT (s != NULL);
965 /* We also need to make an entry in the .rela.plt section. */
967 s = elf_hash_table (info)->srelplt;
968 BFD_ASSERT (s != NULL);
969 s->size += sizeof (Elf32_External_Rela);
974 /* Reinitialize the plt offset now that it is not used as a reference
976 h->plt.offset = (bfd_vma) -1;
978 /* If this is a weak symbol, and there is a real definition, the
979 processor independent code will have arranged for us to see the
980 real definition first, and we can just use the same value. */
981 if (h->u.weakdef != NULL)
983 BFD_ASSERT (h->u.weakdef->root.type == bfd_link_hash_defined
984 || h->u.weakdef->root.type == bfd_link_hash_defweak);
985 h->root.u.def.section = h->u.weakdef->root.u.def.section;
986 h->root.u.def.value = h->u.weakdef->root.u.def.value;
990 /* This is a reference to a symbol defined by a dynamic object which
991 is not a function. */
993 /* If we are creating a shared library, we must presume that the
994 only references to the symbol are via the global offset table.
995 For such cases we need not do anything here; the relocations will
996 be handled correctly by relocate_section. */
997 if (bfd_link_pic (info))
1000 /* We must allocate the symbol in our .dynbss section, which will
1001 become part of the .bss section of the executable. There will be
1002 an entry for this symbol in the .dynsym section. The dynamic
1003 object will contain position independent code, so all references
1004 from the dynamic object to this symbol will go through the global
1005 offset table. The dynamic linker will use the .dynsym entry to
1006 determine the address it must put in the global offset table, so
1007 both the dynamic object and the regular object will refer to the
1008 same memory location for the variable. */
1010 s = bfd_get_linker_section (dynobj, ".dynbss");
1011 BFD_ASSERT (s != NULL);
1013 /* We must generate a R_VAX_COPY reloc to tell the dynamic linker to
1014 copy the initial value out of the dynamic object and into the
1015 runtime process image. We need to remember the offset into the
1016 .rela.bss section we are going to use. */
1017 if ((h->root.u.def.section->flags & SEC_ALLOC) != 0 && h->size != 0)
1021 srel = bfd_get_linker_section (dynobj, ".rela.bss");
1022 BFD_ASSERT (srel != NULL);
1023 srel->size += sizeof (Elf32_External_Rela);
1027 return _bfd_elf_adjust_dynamic_copy (info, h, s);
1030 /* This function is called via elf_link_hash_traverse. It resets GOT
1031 and PLT (.GOT) reference counts back to -1 so normal PC32 relocation
1035 elf_vax_discard_got_entries (struct elf_link_hash_entry *h,
1036 void *infoptr ATTRIBUTE_UNUSED)
1038 h->got.refcount = -1;
1039 h->plt.refcount = -1;
1044 /* Discard unused dynamic data if this is a static link. */
1047 elf_vax_always_size_sections (bfd *output_bfd ATTRIBUTE_UNUSED,
1048 struct bfd_link_info *info)
1053 dynobj = elf_hash_table (info)->dynobj;
1055 if (dynobj && !elf_hash_table (info)->dynamic_sections_created)
1057 /* We may have created entries in the .rela.got and .got sections.
1058 However, if we are not creating the dynamic sections, we will
1059 not actually use these entries. Reset the size of .rela.got
1060 and .got, which will cause them to get stripped from the output
1062 s = elf_hash_table (info)->srelgot;
1065 s = elf_hash_table (info)->sgotplt;
1068 s = elf_hash_table (info)->sgot;
1073 /* If this is a static link, we need to discard all the got entries we've
1075 if (!dynobj || !elf_hash_table (info)->dynamic_sections_created)
1076 elf_link_hash_traverse (elf_hash_table (info),
1077 elf_vax_discard_got_entries,
1083 /* Set the sizes of the dynamic sections. */
1086 elf_vax_size_dynamic_sections (bfd *output_bfd, struct bfd_link_info *info)
1092 bfd_boolean reltext;
1094 dynobj = elf_hash_table (info)->dynobj;
1095 BFD_ASSERT (dynobj != NULL);
1097 if (elf_hash_table (info)->dynamic_sections_created)
1099 /* Set the contents of the .interp section to the interpreter. */
1100 if (bfd_link_executable (info) && !info->nointerp)
1102 s = bfd_get_linker_section (dynobj, ".interp");
1103 BFD_ASSERT (s != NULL);
1104 s->size = sizeof ELF_DYNAMIC_INTERPRETER;
1105 s->contents = (unsigned char *) ELF_DYNAMIC_INTERPRETER;
1109 /* If this is a -Bsymbolic shared link, then we need to discard all PC
1110 relative relocs against symbols defined in a regular object. We
1111 allocated space for them in the check_relocs routine, but we will not
1112 fill them in in the relocate_section routine. */
1113 if (bfd_link_pic (info) && info->symbolic)
1114 elf_vax_link_hash_traverse (elf_hash_table (info),
1115 elf_vax_discard_copies,
1118 /* If this is a -Bsymbolic shared link, we need to discard all the got
1119 entries we've recorded. Otherwise, we need to instantiate (allocate
1121 elf_link_hash_traverse (elf_hash_table (info),
1122 elf_vax_instantiate_got_entries,
1125 /* The check_relocs and adjust_dynamic_symbol entry points have
1126 determined the sizes of the various dynamic sections. Allocate
1131 for (s = dynobj->sections; s != NULL; s = s->next)
1135 if ((s->flags & SEC_LINKER_CREATED) == 0)
1138 /* It's OK to base decisions on the section name, because none
1139 of the dynobj section names depend upon the input files. */
1140 name = bfd_get_section_name (dynobj, s);
1142 if (strcmp (name, ".plt") == 0)
1144 /* Remember whether there is a PLT. */
1147 else if (CONST_STRNEQ (name, ".rela"))
1153 /* Remember whether there are any reloc sections other
1155 if (strcmp (name, ".rela.plt") != 0)
1157 const char *outname;
1161 /* If this relocation section applies to a read only
1162 section, then we probably need a DT_TEXTREL
1163 entry. .rela.plt is actually associated with
1164 .got.plt, which is never readonly. */
1165 outname = bfd_get_section_name (output_bfd,
1167 target = bfd_get_section_by_name (output_bfd, outname + 5);
1169 && (target->flags & SEC_READONLY) != 0
1170 && (target->flags & SEC_ALLOC) != 0)
1174 /* We use the reloc_count field as a counter if we need
1175 to copy relocs into the output file. */
1179 else if (! CONST_STRNEQ (name, ".got")
1180 && strcmp (name, ".dynbss") != 0)
1182 /* It's not one of our sections, so don't allocate space. */
1188 /* If we don't need this section, strip it from the
1189 output file. This is mostly to handle .rela.bss and
1190 .rela.plt. We must create both sections in
1191 create_dynamic_sections, because they must be created
1192 before the linker maps input sections to output
1193 sections. The linker does that before
1194 adjust_dynamic_symbol is called, and it is that
1195 function which decides whether anything needs to go
1196 into these sections. */
1197 s->flags |= SEC_EXCLUDE;
1201 if ((s->flags & SEC_HAS_CONTENTS) == 0)
1204 /* Allocate memory for the section contents. */
1205 s->contents = (bfd_byte *) bfd_zalloc (dynobj, s->size);
1206 if (s->contents == NULL)
1210 if (elf_hash_table (info)->dynamic_sections_created)
1212 /* Add some entries to the .dynamic section. We fill in the
1213 values later, in elf_vax_finish_dynamic_sections, but we
1214 must add the entries now so that we get the correct size for
1215 the .dynamic section. The DT_DEBUG entry is filled in by the
1216 dynamic linker and used by the debugger. */
1217 #define add_dynamic_entry(TAG, VAL) \
1218 _bfd_elf_add_dynamic_entry (info, TAG, VAL)
1220 if (!bfd_link_pic (info))
1222 if (!add_dynamic_entry (DT_DEBUG, 0))
1228 if (!add_dynamic_entry (DT_PLTGOT, 0)
1229 || !add_dynamic_entry (DT_PLTRELSZ, 0)
1230 || !add_dynamic_entry (DT_PLTREL, DT_RELA)
1231 || !add_dynamic_entry (DT_JMPREL, 0))
1237 if (!add_dynamic_entry (DT_RELA, 0)
1238 || !add_dynamic_entry (DT_RELASZ, 0)
1239 || !add_dynamic_entry (DT_RELAENT, sizeof (Elf32_External_Rela)))
1243 if (reltext || (info->flags & DF_TEXTREL) != 0)
1245 if (!add_dynamic_entry (DT_TEXTREL, 0))
1249 #undef add_dynamic_entry
1254 /* This function is called via elf_vax_link_hash_traverse if we are
1255 creating a shared object with -Bsymbolic. It discards the space
1256 allocated to copy PC relative relocs against symbols which are defined
1257 in regular objects. We allocated space for them in the check_relocs
1258 routine, but we won't fill them in in the relocate_section routine. */
1261 elf_vax_discard_copies (struct elf_vax_link_hash_entry *h,
1262 void * ignore ATTRIBUTE_UNUSED)
1264 struct elf_vax_pcrel_relocs_copied *s;
1266 /* We only discard relocs for symbols defined in a regular object. */
1267 if (!h->root.def_regular)
1270 for (s = h->pcrel_relocs_copied; s != NULL; s = s->next)
1271 s->section->size -= s->count * sizeof (Elf32_External_Rela);
1276 /* This function is called via elf_link_hash_traverse. It looks for
1277 entries that have GOT or PLT (.GOT) references. If creating a shared
1278 object with -Bsymbolic, or the symbol has been forced local, then it
1279 resets the reference count back to -1 so normal PC32 relocation will
1280 be done. Otherwise space in the .got and .rela.got will be reserved
1284 elf_vax_instantiate_got_entries (struct elf_link_hash_entry *h, void * infoptr)
1286 struct bfd_link_info *info = (struct bfd_link_info *) infoptr;
1291 /* We don't care about non-GOT (and non-PLT) entries. */
1292 if (h->got.refcount <= 0 && h->plt.refcount <= 0)
1295 dynobj = elf_hash_table (info)->dynobj;
1296 BFD_ASSERT (dynobj != NULL);
1298 sgot = elf_hash_table (info)->sgot;
1299 srelgot = elf_hash_table (info)->srelgot;
1301 if (SYMBOL_REFERENCES_LOCAL (info, h))
1303 h->got.refcount = -1;
1304 h->plt.refcount = -1;
1306 else if (h->got.refcount > 0)
1308 /* Make sure this symbol is output as a dynamic symbol. */
1309 if (h->dynindx == -1)
1311 if (!bfd_elf_link_record_dynamic_symbol (info, h))
1315 /* Allocate space in the .got and .rela.got sections. */
1317 srelgot->size += sizeof (Elf32_External_Rela);
1323 /* Relocate an VAX ELF section. */
1326 elf_vax_relocate_section (bfd *output_bfd,
1327 struct bfd_link_info *info,
1329 asection *input_section,
1331 Elf_Internal_Rela *relocs,
1332 Elf_Internal_Sym *local_syms,
1333 asection **local_sections)
1335 Elf_Internal_Shdr *symtab_hdr;
1336 struct elf_link_hash_entry **sym_hashes;
1343 Elf_Internal_Rela *rel;
1344 Elf_Internal_Rela *relend;
1346 symtab_hdr = &elf_tdata (input_bfd)->symtab_hdr;
1347 sym_hashes = elf_sym_hashes (input_bfd);
1355 relend = relocs + input_section->reloc_count;
1356 for (; rel < relend; rel++)
1359 reloc_howto_type *howto;
1360 unsigned long r_symndx;
1361 struct elf_link_hash_entry *h;
1362 Elf_Internal_Sym *sym;
1365 bfd_reloc_status_type r;
1367 r_type = ELF32_R_TYPE (rel->r_info);
1368 if (r_type < 0 || r_type >= (int) R_VAX_max)
1370 bfd_set_error (bfd_error_bad_value);
1373 howto = howto_table + r_type;
1375 r_symndx = ELF32_R_SYM (rel->r_info);
1379 if (r_symndx < symtab_hdr->sh_info)
1381 sym = local_syms + r_symndx;
1382 sec = local_sections[r_symndx];
1383 relocation = _bfd_elf_rela_local_sym (output_bfd, sym, &sec, rel);
1387 bfd_boolean unresolved_reloc;
1388 bfd_boolean warned, ignored;
1390 RELOC_FOR_GLOBAL_SYMBOL (info, input_bfd, input_section, rel,
1391 r_symndx, symtab_hdr, sym_hashes,
1393 unresolved_reloc, warned, ignored);
1395 if ((h->root.type == bfd_link_hash_defined
1396 || h->root.type == bfd_link_hash_defweak)
1397 && ((r_type == R_VAX_PLT32
1398 && h->plt.offset != (bfd_vma) -1
1400 && elf_hash_table (info)->dynamic_sections_created)
1401 || (r_type == R_VAX_GOT32
1402 && h->got.offset != (bfd_vma) -1
1404 && elf_hash_table (info)->dynamic_sections_created
1405 && (! bfd_link_pic (info)
1406 || (! info->symbolic && h->dynindx != -1)
1407 || !h->def_regular))
1408 || (bfd_link_pic (info)
1409 && ((! info->symbolic && h->dynindx != -1)
1411 && ((input_section->flags & SEC_ALLOC) != 0
1412 /* DWARF will emit R_VAX_32 relocations in its
1413 sections against symbols defined externally
1414 in shared libraries. We can't do anything
1417 || ((input_section->flags & SEC_DEBUGGING) != 0
1419 && (r_type == R_VAX_8
1420 || r_type == R_VAX_16
1421 || r_type == R_VAX_32))))
1422 /* In these cases, we don't need the relocation
1423 value. We check specially because in some
1424 obscure cases sec->output_section will be NULL. */
1428 if (sec != NULL && discarded_section (sec))
1429 RELOC_AGAINST_DISCARDED_SECTION (info, input_bfd, input_section,
1430 rel, 1, relend, howto, 0, contents);
1432 if (bfd_link_relocatable (info))
1438 /* Relocation is to the address of the entry for this symbol
1439 in the global offset table. */
1441 /* Resolve a GOTxx reloc against a local symbol directly,
1442 without using the global offset table. */
1444 || h->got.offset == (bfd_vma) -1)
1450 sgot = elf_hash_table (info)->sgot;
1451 BFD_ASSERT (sgot != NULL);
1453 off = h->got.offset;
1454 BFD_ASSERT (off < sgot->size);
1456 bfd_put_32 (output_bfd, rel->r_addend, sgot->contents + off);
1458 relocation = sgot->output_offset + off;
1459 /* The GOT relocation uses the addend. */
1462 /* Change the reference to be indirect. */
1463 contents[rel->r_offset - 1] |= 0x10;
1464 relocation += sgot->output_section->vma;
1469 /* If we are creating an executable and the function this
1470 reloc refers to is in a shared lib, then we made a PLT
1471 entry for this symbol and need to handle the reloc like
1473 if (bfd_link_pic (info))
1474 goto r_vax_pc32_shared;
1477 /* Relocation is to the entry for this symbol in the
1478 procedure linkage table. */
1480 /* Resolve a PLTxx reloc against a local symbol directly,
1481 without using the procedure linkage table. */
1483 || h->plt.offset == (bfd_vma) -1)
1486 splt = elf_hash_table (info)->splt;
1487 BFD_ASSERT (splt != NULL);
1489 sgotplt = elf_hash_table (info)->sgotplt;
1490 BFD_ASSERT (sgotplt != NULL);
1492 plt_index = h->plt.offset / PLT_ENTRY_SIZE - 1;
1494 /* Get the offset into the .got table of the entry that
1495 corresponds to this function. Each .got entry is 4 bytes.
1496 The first two are reserved. */
1497 got_offset = (plt_index + 3) * 4;
1499 /* We want the relocation to point into the .got.plt instead
1500 of the plt itself. */
1501 relocation = (sgotplt->output_section->vma
1502 + sgotplt->output_offset
1504 contents[rel->r_offset-1] |= 0x10; /* make indirect */
1505 if (rel->r_addend == 2)
1509 else if (rel->r_addend != 0)
1511 /* xgettext:c-format */
1512 (_("%s: warning: PLT addend of %d to `%s' from %s section ignored"),
1513 bfd_get_filename (input_bfd), rel->r_addend,
1514 h->root.root.string,
1515 bfd_get_section_name (input_bfd, input_section));
1524 || ELF_ST_VISIBILITY (h->other) != STV_DEFAULT
1531 if (bfd_link_pic (info)
1532 && r_symndx != STN_UNDEF
1533 && (input_section->flags & SEC_ALLOC) != 0
1534 && ((r_type != R_VAX_PC8
1535 && r_type != R_VAX_PC16
1536 && r_type != R_VAX_PC32)
1537 || ((input_section->flags & SEC_CODE)
1539 || (!h->def_regular && h->type != STT_SECTION)))))
1541 Elf_Internal_Rela outrel;
1543 bfd_boolean skip, relocate;
1545 /* When generating a shared object, these relocations
1546 are copied into the output file to be resolved at run
1550 sreloc = _bfd_elf_get_dynamic_reloc_section
1551 (input_bfd, input_section, /*rela?*/ TRUE);
1560 _bfd_elf_section_offset (output_bfd, info, input_section,
1562 if (outrel.r_offset == (bfd_vma) -1)
1564 if (outrel.r_offset == (bfd_vma) -2)
1565 skip = TRUE, relocate = TRUE;
1566 outrel.r_offset += (input_section->output_section->vma
1567 + input_section->output_offset);
1570 memset (&outrel, 0, sizeof outrel);
1571 /* h->dynindx may be -1 if the symbol was marked to
1574 && ((! info->symbolic && h->dynindx != -1)
1575 || !h->def_regular))
1577 BFD_ASSERT (h->dynindx != -1);
1578 outrel.r_info = ELF32_R_INFO (h->dynindx, r_type);
1579 outrel.r_addend = relocation + rel->r_addend;
1583 if (r_type == R_VAX_32)
1586 outrel.r_info = ELF32_R_INFO (0, R_VAX_RELATIVE);
1587 BFD_ASSERT (bfd_get_signed_32 (input_bfd,
1588 &contents[rel->r_offset]) == 0);
1589 outrel.r_addend = relocation + rel->r_addend;
1595 if (bfd_is_abs_section (sec))
1597 else if (sec == NULL || sec->owner == NULL)
1599 bfd_set_error (bfd_error_bad_value);
1606 /* We are turning this relocation into one
1607 against a section symbol. It would be
1608 proper to subtract the symbol's value,
1609 osec->vma, from the emitted reloc addend,
1610 but ld.so expects buggy relocs. */
1611 osec = sec->output_section;
1612 indx = elf_section_data (osec)->dynindx;
1615 struct elf_link_hash_table *htab;
1616 htab = elf_hash_table (info);
1617 osec = htab->text_index_section;
1618 indx = elf_section_data (osec)->dynindx;
1620 BFD_ASSERT (indx != 0);
1623 outrel.r_info = ELF32_R_INFO (indx, r_type);
1624 outrel.r_addend = relocation + rel->r_addend;
1628 if ((input_section->flags & SEC_CODE) != 0
1629 || (ELF32_R_TYPE (outrel.r_info) != R_VAX_32
1630 && ELF32_R_TYPE (outrel.r_info) != R_VAX_RELATIVE
1631 && ELF32_R_TYPE (outrel.r_info) != R_VAX_COPY
1632 && ELF32_R_TYPE (outrel.r_info) != R_VAX_JMP_SLOT
1633 && ELF32_R_TYPE (outrel.r_info) != R_VAX_GLOB_DAT))
1637 /* xgettext:c-format */
1638 (_("%s: warning: %s relocation against symbol `%s' from %s section"),
1639 bfd_get_filename (input_bfd), howto->name,
1640 h->root.root.string,
1641 bfd_get_section_name (input_bfd, input_section));
1644 /* xgettext:c-format */
1645 (_("%s: warning: %s relocation to 0x%x from %s section"),
1646 bfd_get_filename (input_bfd), howto->name,
1648 bfd_get_section_name (input_bfd, input_section));
1650 loc = sreloc->contents;
1651 loc += sreloc->reloc_count++ * sizeof (Elf32_External_Rela);
1652 bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc);
1654 /* This reloc will be computed at runtime, so there's no
1655 need to do anything now, except for R_VAX_32
1656 relocations that have been turned into
1664 case R_VAX_GNU_VTINHERIT:
1665 case R_VAX_GNU_VTENTRY:
1666 /* These are no-ops in the end. */
1673 /* VAX PCREL relocations are from the end of relocation, not the start.
1674 So subtract the difference from the relocation amount since we can't
1675 add it to the offset. */
1676 if (howto->pc_relative && howto->pcrel_offset)
1677 relocation -= bfd_get_reloc_size(howto);
1679 r = _bfd_final_link_relocate (howto, input_bfd, input_section,
1680 contents, rel->r_offset,
1681 relocation, rel->r_addend);
1683 if (r != bfd_reloc_ok)
1688 case bfd_reloc_outofrange:
1690 case bfd_reloc_overflow:
1698 name = bfd_elf_string_from_elf_section (input_bfd,
1699 symtab_hdr->sh_link,
1704 name = bfd_section_name (input_bfd, sec);
1706 info->callbacks->reloc_overflow
1707 (info, (h ? &h->root : NULL), name, howto->name,
1708 (bfd_vma) 0, input_bfd, input_section, rel->r_offset);
1718 /* Finish up dynamic symbol handling. We set the contents of various
1719 dynamic sections here. */
1722 elf_vax_finish_dynamic_symbol (bfd *output_bfd, struct bfd_link_info *info,
1723 struct elf_link_hash_entry *h,
1724 Elf_Internal_Sym *sym)
1728 dynobj = elf_hash_table (info)->dynobj;
1730 if (h->plt.offset != (bfd_vma) -1)
1738 Elf_Internal_Rela rela;
1741 /* This symbol has an entry in the procedure linkage table. Set
1743 BFD_ASSERT (h->dynindx != -1);
1745 splt = elf_hash_table (info)->splt;
1746 sgot = elf_hash_table (info)->sgotplt;
1747 srela = elf_hash_table (info)->srelplt;
1748 BFD_ASSERT (splt != NULL && sgot != NULL && srela != NULL);
1750 addend = 2 * (h->plt.offset & 1);
1751 h->plt.offset &= ~1;
1753 /* Get the index in the procedure linkage table which
1754 corresponds to this symbol. This is the index of this symbol
1755 in all the symbols for which we are making plt entries. The
1756 first entry in the procedure linkage table is reserved. */
1757 plt_index = h->plt.offset / PLT_ENTRY_SIZE - 1;
1759 /* Get the offset into the .got table of the entry that
1760 corresponds to this function. Each .got entry is 4 bytes.
1761 The first two are reserved. */
1762 got_offset = (plt_index + 3) * 4;
1764 /* Fill in the entry in the procedure linkage table. */
1765 memcpy (splt->contents + h->plt.offset, elf_vax_plt_entry,
1768 /* The offset is relative to the first extension word. */
1769 bfd_put_32 (output_bfd,
1770 -(h->plt.offset + 8),
1771 splt->contents + h->plt.offset + 4);
1773 bfd_put_32 (output_bfd, plt_index * sizeof (Elf32_External_Rela),
1774 splt->contents + h->plt.offset + 8);
1776 /* Fill in the entry in the global offset table. */
1777 bfd_put_32 (output_bfd,
1778 (splt->output_section->vma
1779 + splt->output_offset
1780 + h->plt.offset) + addend,
1781 sgot->contents + got_offset);
1783 /* Fill in the entry in the .rela.plt section. */
1784 rela.r_offset = (sgot->output_section->vma
1785 + sgot->output_offset
1787 rela.r_info = ELF32_R_INFO (h->dynindx, R_VAX_JMP_SLOT);
1788 rela.r_addend = addend;
1789 loc = srela->contents + plt_index * sizeof (Elf32_External_Rela);
1790 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
1792 if (!h->def_regular)
1794 /* Mark the symbol as undefined, rather than as defined in
1795 the .plt section. Leave the value alone. */
1796 sym->st_shndx = SHN_UNDEF;
1800 if (h->got.offset != (bfd_vma) -1)
1804 Elf_Internal_Rela rela;
1807 /* This symbol has an entry in the global offset table. Set it
1809 sgot = elf_hash_table (info)->sgot;
1810 srela = elf_hash_table (info)->srelgot;
1811 BFD_ASSERT (sgot != NULL && srela != NULL);
1813 rela.r_offset = (sgot->output_section->vma
1814 + sgot->output_offset
1816 rela.r_info = ELF32_R_INFO (h->dynindx, R_VAX_GLOB_DAT);
1817 rela.r_addend = bfd_get_signed_32 (output_bfd,
1818 sgot->contents + h->got.offset);
1820 loc = srela->contents;
1821 loc += srela->reloc_count++ * sizeof (Elf32_External_Rela);
1822 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
1828 Elf_Internal_Rela rela;
1831 /* This symbol needs a copy reloc. Set it up. */
1832 BFD_ASSERT (h->dynindx != -1
1833 && (h->root.type == bfd_link_hash_defined
1834 || h->root.type == bfd_link_hash_defweak));
1836 s = bfd_get_linker_section (dynobj, ".rela.bss");
1837 BFD_ASSERT (s != NULL);
1839 rela.r_offset = (h->root.u.def.value
1840 + h->root.u.def.section->output_section->vma
1841 + h->root.u.def.section->output_offset);
1842 rela.r_info = ELF32_R_INFO (h->dynindx, R_VAX_COPY);
1844 loc = s->contents + s->reloc_count++ * sizeof (Elf32_External_Rela);
1845 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
1848 /* Mark _DYNAMIC and _GLOBAL_OFFSET_TABLE_ as absolute. */
1849 if (h == elf_hash_table (info)->hdynamic
1850 || h == elf_hash_table (info)->hgot)
1851 sym->st_shndx = SHN_ABS;
1856 /* Finish up the dynamic sections. */
1859 elf_vax_finish_dynamic_sections (bfd *output_bfd, struct bfd_link_info *info)
1865 dynobj = elf_hash_table (info)->dynobj;
1867 sgot = elf_hash_table (info)->sgotplt;
1868 BFD_ASSERT (sgot != NULL);
1869 sdyn = bfd_get_linker_section (dynobj, ".dynamic");
1871 if (elf_hash_table (info)->dynamic_sections_created)
1874 Elf32_External_Dyn *dyncon, *dynconend;
1876 splt = elf_hash_table (info)->splt;
1877 BFD_ASSERT (splt != NULL && sdyn != NULL);
1879 dyncon = (Elf32_External_Dyn *) sdyn->contents;
1880 dynconend = (Elf32_External_Dyn *) (sdyn->contents + sdyn->size);
1881 for (; dyncon < dynconend; dyncon++)
1883 Elf_Internal_Dyn dyn;
1886 bfd_elf32_swap_dyn_in (dynobj, dyncon, &dyn);
1894 s = elf_hash_table (info)->sgotplt;
1897 s = elf_hash_table (info)->srelplt;
1899 dyn.d_un.d_ptr = s->output_section->vma + s->output_offset;
1900 bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon);
1904 s = elf_hash_table (info)->srelplt;
1905 dyn.d_un.d_val = s->size;
1906 bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon);
1910 /* The procedure linkage table relocs (DT_JMPREL) should
1911 not be included in the overall relocs (DT_RELA).
1912 Therefore, we override the DT_RELASZ entry here to
1913 make it not include the JMPREL relocs. Since the
1914 linker script arranges for .rela.plt to follow all
1915 other relocation sections, we don't have to worry
1916 about changing the DT_RELA entry. */
1917 s = elf_hash_table (info)->srelplt;
1919 dyn.d_un.d_val -= s->size;
1920 bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon);
1925 /* Fill in the first entry in the procedure linkage table. */
1928 memcpy (splt->contents, elf_vax_plt0_entry, PLT_ENTRY_SIZE);
1929 bfd_put_32 (output_bfd,
1930 (sgot->output_section->vma
1931 + sgot->output_offset + 4
1932 - (splt->output_section->vma + 6)),
1933 splt->contents + 2);
1934 bfd_put_32 (output_bfd,
1935 (sgot->output_section->vma
1936 + sgot->output_offset + 8
1937 - (splt->output_section->vma + 12)),
1938 splt->contents + 8);
1939 elf_section_data (splt->output_section)->this_hdr.sh_entsize
1944 /* Fill in the first three entries in the global offset table. */
1948 bfd_put_32 (output_bfd, (bfd_vma) 0, sgot->contents);
1950 bfd_put_32 (output_bfd,
1951 sdyn->output_section->vma + sdyn->output_offset,
1953 bfd_put_32 (output_bfd, (bfd_vma) 0, sgot->contents + 4);
1954 bfd_put_32 (output_bfd, (bfd_vma) 0, sgot->contents + 8);
1957 if (elf_section_data (sgot->output_section) != NULL)
1958 elf_section_data (sgot->output_section)->this_hdr.sh_entsize = 4;
1963 static enum elf_reloc_type_class
1964 elf_vax_reloc_type_class (const struct bfd_link_info *info ATTRIBUTE_UNUSED,
1965 const asection *rel_sec ATTRIBUTE_UNUSED,
1966 const Elf_Internal_Rela *rela)
1968 switch ((int) ELF32_R_TYPE (rela->r_info))
1970 case R_VAX_RELATIVE:
1971 return reloc_class_relative;
1972 case R_VAX_JMP_SLOT:
1973 return reloc_class_plt;
1975 return reloc_class_copy;
1977 return reloc_class_normal;
1982 elf_vax_plt_sym_val (bfd_vma i, const asection *plt,
1983 const arelent *rel ATTRIBUTE_UNUSED)
1985 return plt->vma + (i + 1) * PLT_ENTRY_SIZE;
1988 #define TARGET_LITTLE_SYM vax_elf32_vec
1989 #define TARGET_LITTLE_NAME "elf32-vax"
1990 #define ELF_MACHINE_CODE EM_VAX
1991 #define ELF_MAXPAGESIZE 0x1000
1993 #define elf_backend_create_dynamic_sections \
1994 _bfd_elf_create_dynamic_sections
1995 #define bfd_elf32_bfd_link_hash_table_create \
1996 elf_vax_link_hash_table_create
1997 #define bfd_elf32_bfd_final_link bfd_elf_gc_common_final_link
1999 #define elf_backend_check_relocs elf_vax_check_relocs
2000 #define elf_backend_adjust_dynamic_symbol \
2001 elf_vax_adjust_dynamic_symbol
2002 #define elf_backend_always_size_sections \
2003 elf_vax_always_size_sections
2004 #define elf_backend_size_dynamic_sections \
2005 elf_vax_size_dynamic_sections
2006 #define elf_backend_init_index_section _bfd_elf_init_1_index_section
2007 #define elf_backend_relocate_section elf_vax_relocate_section
2008 #define elf_backend_finish_dynamic_symbol \
2009 elf_vax_finish_dynamic_symbol
2010 #define elf_backend_finish_dynamic_sections \
2011 elf_vax_finish_dynamic_sections
2012 #define elf_backend_reloc_type_class elf_vax_reloc_type_class
2013 #define elf_backend_gc_mark_hook elf_vax_gc_mark_hook
2014 #define elf_backend_gc_sweep_hook elf_vax_gc_sweep_hook
2015 #define elf_backend_plt_sym_val elf_vax_plt_sym_val
2016 #define bfd_elf32_bfd_merge_private_bfd_data \
2017 elf32_vax_merge_private_bfd_data
2018 #define bfd_elf32_bfd_set_private_flags \
2019 elf32_vax_set_private_flags
2020 #define bfd_elf32_bfd_print_private_bfd_data \
2021 elf32_vax_print_private_bfd_data
2023 #define elf_backend_can_gc_sections 1
2024 #define elf_backend_want_got_plt 1
2025 #define elf_backend_plt_readonly 1
2026 #define elf_backend_want_plt_sym 0
2027 #define elf_backend_got_header_size 16
2028 #define elf_backend_rela_normal 1
2030 #include "elf32-target.h"