1 /* VAX series support for 32-bit ELF
2 Copyright (C) 1993-2015 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_merge_private_bfd_data (bfd
*, bfd
*);
54 static bfd_boolean
elf32_vax_print_private_bfd_data (bfd
*, void *);
56 static reloc_howto_type howto_table
[] = {
57 HOWTO (R_VAX_NONE
, /* type */
59 3, /* size (0 = byte, 1 = short, 2 = long) */
61 FALSE
, /* pc_relative */
63 complain_overflow_dont
, /* complain_on_overflow */
64 bfd_elf_generic_reloc
, /* special_function */
65 "R_VAX_NONE", /* name */
66 FALSE
, /* partial_inplace */
68 0x00000000, /* dst_mask */
69 FALSE
), /* pcrel_offset */
71 HOWTO (R_VAX_32
, /* type */
73 2, /* size (0 = byte, 1 = short, 2 = long) */
75 FALSE
, /* pc_relative */
77 complain_overflow_bitfield
, /* complain_on_overflow */
78 bfd_elf_generic_reloc
, /* special_function */
79 "R_VAX_32", /* name */
80 FALSE
, /* partial_inplace */
82 0xffffffff, /* dst_mask */
83 FALSE
), /* pcrel_offset */
85 HOWTO (R_VAX_16
, /* type */
87 1, /* size (0 = byte, 1 = short, 2 = long) */
89 FALSE
, /* pc_relative */
91 complain_overflow_bitfield
, /* complain_on_overflow */
92 bfd_elf_generic_reloc
, /* special_function */
93 "R_VAX_16", /* name */
94 FALSE
, /* partial_inplace */
96 0x0000ffff, /* dst_mask */
97 FALSE
), /* pcrel_offset */
99 HOWTO (R_VAX_8
, /* type */
101 0, /* size (0 = byte, 1 = short, 2 = long) */
103 FALSE
, /* pc_relative */
105 complain_overflow_bitfield
, /* complain_on_overflow */
106 bfd_elf_generic_reloc
, /* special_function */
107 "R_VAX_8", /* name */
108 FALSE
, /* partial_inplace */
110 0x000000ff, /* dst_mask */
111 FALSE
), /* pcrel_offset */
113 HOWTO (R_VAX_PC32
, /* type */
115 2, /* size (0 = byte, 1 = short, 2 = long) */
117 TRUE
, /* pc_relative */
119 complain_overflow_bitfield
, /* complain_on_overflow */
120 bfd_elf_generic_reloc
, /* special_function */
121 "R_VAX_PC32", /* name */
122 FALSE
, /* partial_inplace */
124 0xffffffff, /* dst_mask */
125 TRUE
), /* pcrel_offset */
127 HOWTO (R_VAX_PC16
, /* type */
129 1, /* size (0 = byte, 1 = short, 2 = long) */
131 TRUE
, /* pc_relative */
133 complain_overflow_signed
, /* complain_on_overflow */
134 bfd_elf_generic_reloc
, /* special_function */
135 "R_VAX_PC16", /* name */
136 FALSE
, /* partial_inplace */
138 0x0000ffff, /* dst_mask */
139 TRUE
), /* pcrel_offset */
141 HOWTO (R_VAX_PC8
, /* type */
143 0, /* size (0 = byte, 1 = short, 2 = long) */
145 TRUE
, /* pc_relative */
147 complain_overflow_signed
, /* complain_on_overflow */
148 bfd_elf_generic_reloc
, /* special_function */
149 "R_VAX_PC8", /* name */
150 FALSE
, /* partial_inplace */
152 0x000000ff, /* dst_mask */
153 TRUE
), /* pcrel_offset */
155 HOWTO (R_VAX_GOT32
, /* type */
157 2, /* size (0 = byte, 1 = short, 2 = long) */
159 TRUE
, /* pc_relative */
161 complain_overflow_bitfield
, /* complain_on_overflow */
162 bfd_elf_generic_reloc
, /* special_function */
163 "R_VAX_GOT32", /* name */
164 FALSE
, /* partial_inplace */
166 0xffffffff, /* dst_mask */
167 TRUE
), /* pcrel_offset */
175 HOWTO (R_VAX_PLT32
, /* type */
177 2, /* size (0 = byte, 1 = short, 2 = long) */
179 TRUE
, /* pc_relative */
181 complain_overflow_bitfield
, /* complain_on_overflow */
182 bfd_elf_generic_reloc
, /* special_function */
183 "R_VAX_PLT32", /* name */
184 FALSE
, /* partial_inplace */
186 0xffffffff, /* dst_mask */
187 TRUE
), /* pcrel_offset */
195 HOWTO (R_VAX_COPY
, /* type */
197 0, /* size (0 = byte, 1 = short, 2 = long) */
199 FALSE
, /* pc_relative */
201 complain_overflow_dont
, /* complain_on_overflow */
202 bfd_elf_generic_reloc
, /* special_function */
203 "R_VAX_COPY", /* name */
204 FALSE
, /* partial_inplace */
206 0xffffffff, /* dst_mask */
207 FALSE
), /* pcrel_offset */
209 HOWTO (R_VAX_GLOB_DAT
, /* type */
211 2, /* size (0 = byte, 1 = short, 2 = long) */
213 FALSE
, /* pc_relative */
215 complain_overflow_dont
, /* complain_on_overflow */
216 bfd_elf_generic_reloc
, /* special_function */
217 "R_VAX_GLOB_DAT", /* name */
218 FALSE
, /* partial_inplace */
220 0xffffffff, /* dst_mask */
221 FALSE
), /* pcrel_offset */
223 HOWTO (R_VAX_JMP_SLOT
, /* type */
225 2, /* size (0 = byte, 1 = short, 2 = long) */
227 FALSE
, /* pc_relative */
229 complain_overflow_dont
, /* complain_on_overflow */
230 bfd_elf_generic_reloc
, /* special_function */
231 "R_VAX_JMP_SLOT", /* name */
232 FALSE
, /* partial_inplace */
234 0xffffffff, /* dst_mask */
235 FALSE
), /* pcrel_offset */
237 HOWTO (R_VAX_RELATIVE
, /* type */
239 2, /* size (0 = byte, 1 = short, 2 = long) */
241 FALSE
, /* pc_relative */
243 complain_overflow_dont
, /* complain_on_overflow */
244 bfd_elf_generic_reloc
, /* special_function */
245 "R_VAX_RELATIVE", /* name */
246 FALSE
, /* partial_inplace */
248 0xffffffff, /* dst_mask */
249 FALSE
), /* pcrel_offset */
251 /* GNU extension to record C++ vtable hierarchy */
252 HOWTO (R_VAX_GNU_VTINHERIT
, /* type */
254 2, /* size (0 = byte, 1 = short, 2 = long) */
256 FALSE
, /* pc_relative */
258 complain_overflow_dont
, /* complain_on_overflow */
259 NULL
, /* special_function */
260 "R_VAX_GNU_VTINHERIT", /* name */
261 FALSE
, /* partial_inplace */
264 FALSE
), /* pcrel_offset */
266 /* GNU extension to record C++ vtable member usage */
267 HOWTO (R_VAX_GNU_VTENTRY
, /* type */
269 2, /* size (0 = byte, 1 = short, 2 = long) */
271 FALSE
, /* pc_relative */
273 complain_overflow_dont
, /* complain_on_overflow */
274 _bfd_elf_rel_vtable_reloc_fn
, /* special_function */
275 "R_VAX_GNU_VTENTRY", /* name */
276 FALSE
, /* partial_inplace */
279 FALSE
), /* pcrel_offset */
283 rtype_to_howto (bfd
*abfd ATTRIBUTE_UNUSED
, arelent
*cache_ptr
,
284 Elf_Internal_Rela
*dst
)
288 r_type
= ELF32_R_TYPE (dst
->r_info
);
289 if (r_type
>= R_VAX_max
)
291 (*_bfd_error_handler
) (_("%A: unrecognised VAX reloc number: %d"),
293 bfd_set_error (bfd_error_bad_value
);
296 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
, bfd
*obfd
)
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
;
568 if (info
->relocatable
)
571 dynobj
= elf_hash_table (info
)->dynobj
;
572 symtab_hdr
= &elf_tdata (abfd
)->symtab_hdr
;
573 sym_hashes
= elf_sym_hashes (abfd
);
579 rel_end
= relocs
+ sec
->reloc_count
;
580 for (rel
= relocs
; rel
< rel_end
; rel
++)
582 unsigned long r_symndx
;
583 struct elf_link_hash_entry
*h
;
585 r_symndx
= ELF32_R_SYM (rel
->r_info
);
587 if (r_symndx
< symtab_hdr
->sh_info
)
591 h
= sym_hashes
[r_symndx
- symtab_hdr
->sh_info
];
592 while (h
->root
.type
== bfd_link_hash_indirect
593 || h
->root
.type
== bfd_link_hash_warning
)
594 h
= (struct elf_link_hash_entry
*) h
->root
.u
.i
.link
;
596 /* PR15323, ref flags aren't set for references in the same
598 h
->root
.non_ir_ref
= 1;
601 switch (ELF32_R_TYPE (rel
->r_info
))
604 BFD_ASSERT (h
!= NULL
);
606 /* If this is a local symbol, we resolve it directly without
607 creating a global offset table entry. */
609 || h
== elf_hash_table (info
)->hgot
610 || h
== elf_hash_table (info
)->hplt
)
613 /* This symbol requires a global offset table entry. */
617 /* Create the .got section. */
618 elf_hash_table (info
)->dynobj
= dynobj
= abfd
;
619 if (!_bfd_elf_create_got_section (dynobj
, info
))
625 sgot
= bfd_get_linker_section (dynobj
, ".got");
626 BFD_ASSERT (sgot
!= NULL
);
630 && (h
!= NULL
|| info
->shared
))
632 srelgot
= bfd_get_linker_section (dynobj
, ".rela.got");
635 flagword flags
= (SEC_ALLOC
| SEC_LOAD
| SEC_HAS_CONTENTS
636 | SEC_IN_MEMORY
| SEC_LINKER_CREATED
639 srelgot
= bfd_make_section_anyway_with_flags (dynobj
,
643 || !bfd_set_section_alignment (dynobj
, srelgot
, 2))
650 struct elf_vax_link_hash_entry
*eh
;
652 eh
= (struct elf_vax_link_hash_entry
*) h
;
653 if (h
->got
.refcount
== -1)
656 eh
->got_addend
= rel
->r_addend
;
661 if (eh
->got_addend
!= (bfd_vma
) rel
->r_addend
)
662 (*_bfd_error_handler
)
663 (_("%s: warning: GOT addend of %ld to `%s' does"
664 " not match previous GOT addend of %ld"),
665 bfd_get_filename (abfd
), rel
->r_addend
,
674 /* This symbol requires a procedure linkage table entry. We
675 actually build the entry in adjust_dynamic_symbol,
676 because this might be a case of linking PIC code which is
677 never referenced by a dynamic object, in which case we
678 don't need to generate a procedure linkage table entry
680 BFD_ASSERT (h
!= NULL
);
682 /* If this is a local symbol, we resolve it directly without
683 creating a procedure linkage table entry. */
688 if (h
->plt
.refcount
== -1)
697 /* If we are creating a shared library and this is not a local
698 symbol, we need to copy the reloc into the shared library.
699 However when linking with -Bsymbolic and this is a global
700 symbol which is defined in an object we are including in the
701 link (i.e., DEF_REGULAR is set), then we can resolve the
702 reloc directly. At this point we have not seen all the input
703 files, so it is possible that DEF_REGULAR is not set now but
704 will be set later (it is never cleared). We account for that
705 possibility below by storing information in the
706 pcrel_relocs_copied field of the hash table entry. */
708 && (sec
->flags
& SEC_ALLOC
) != 0
711 || !h
->def_regular
)))
714 && ELF_ST_VISIBILITY (h
->other
) == STV_DEFAULT
717 /* Make sure a plt entry is created for this symbol if
718 it turns out to be a function defined by a dynamic
720 if (h
->plt
.refcount
== -1)
727 /* If this is a local symbol, we can resolve it directly. */
729 && (ELF_ST_VISIBILITY (h
->other
) != STV_DEFAULT
737 if (h
!= NULL
&& ELF_ST_VISIBILITY (h
->other
) == STV_DEFAULT
)
739 /* Make sure a plt entry is created for this symbol if it
740 turns out to be a function defined by a dynamic object. */
741 if (h
->plt
.refcount
== -1)
747 /* If we are creating a shared library, we need to copy the
748 reloc into the shared library. */
750 && (sec
->flags
& SEC_ALLOC
) != 0)
752 /* When creating a shared object, we must copy these
753 reloc types into the output file. We create a reloc
754 section in dynobj and make room for this reloc. */
757 sreloc
= _bfd_elf_make_dynamic_reloc_section
758 (sec
, dynobj
, 2, abfd
, /*rela?*/ TRUE
);
763 if (sec
->flags
& SEC_READONLY
)
764 info
->flags
|= DF_TEXTREL
;
767 sreloc
->size
+= sizeof (Elf32_External_Rela
);
769 /* If we are linking with -Bsymbolic, we count the number of
770 PC relative relocations we have entered for this symbol,
771 so that we can discard them again if the symbol is later
772 defined by a regular object. Note that this function is
773 only called if we are using a vaxelf linker hash table,
774 which means that h is really a pointer to an
775 elf_vax_link_hash_entry. */
776 if ((ELF32_R_TYPE (rel
->r_info
) == R_VAX_PC8
777 || ELF32_R_TYPE (rel
->r_info
) == R_VAX_PC16
778 || ELF32_R_TYPE (rel
->r_info
) == R_VAX_PC32
)
781 struct elf_vax_link_hash_entry
*eh
;
782 struct elf_vax_pcrel_relocs_copied
*p
;
784 eh
= (struct elf_vax_link_hash_entry
*) h
;
786 for (p
= eh
->pcrel_relocs_copied
; p
!= NULL
; p
= p
->next
)
787 if (p
->section
== sreloc
)
792 p
= ((struct elf_vax_pcrel_relocs_copied
*)
793 bfd_alloc (dynobj
, (bfd_size_type
) sizeof *p
));
796 p
->next
= eh
->pcrel_relocs_copied
;
797 eh
->pcrel_relocs_copied
= p
;
808 /* This relocation describes the C++ object vtable hierarchy.
809 Reconstruct it for later use during GC. */
810 case R_VAX_GNU_VTINHERIT
:
811 if (!bfd_elf_gc_record_vtinherit (abfd
, sec
, h
, rel
->r_offset
))
815 /* This relocation describes which C++ vtable entries are actually
816 used. Record for later use during GC. */
817 case R_VAX_GNU_VTENTRY
:
818 BFD_ASSERT (h
!= NULL
);
820 && !bfd_elf_gc_record_vtentry (abfd
, sec
, h
, rel
->r_addend
))
832 /* Return the section that should be marked against GC for a given
836 elf_vax_gc_mark_hook (asection
*sec
,
837 struct bfd_link_info
*info
,
838 Elf_Internal_Rela
*rel
,
839 struct elf_link_hash_entry
*h
,
840 Elf_Internal_Sym
*sym
)
843 switch (ELF32_R_TYPE (rel
->r_info
))
845 case R_VAX_GNU_VTINHERIT
:
846 case R_VAX_GNU_VTENTRY
:
850 return _bfd_elf_gc_mark_hook (sec
, info
, rel
, h
, sym
);
853 /* Update the got entry reference counts for the section being removed. */
856 elf_vax_gc_sweep_hook (bfd
*abfd
, struct bfd_link_info
*info
, asection
*sec
,
857 const Elf_Internal_Rela
*relocs
)
859 Elf_Internal_Shdr
*symtab_hdr
;
860 struct elf_link_hash_entry
**sym_hashes
;
861 const Elf_Internal_Rela
*rel
, *relend
;
864 if (info
->relocatable
)
867 dynobj
= elf_hash_table (info
)->dynobj
;
871 symtab_hdr
= &elf_tdata (abfd
)->symtab_hdr
;
872 sym_hashes
= elf_sym_hashes (abfd
);
874 relend
= relocs
+ sec
->reloc_count
;
875 for (rel
= relocs
; rel
< relend
; rel
++)
877 unsigned long r_symndx
;
878 struct elf_link_hash_entry
*h
= NULL
;
880 r_symndx
= ELF32_R_SYM (rel
->r_info
);
881 if (r_symndx
>= symtab_hdr
->sh_info
)
883 h
= sym_hashes
[r_symndx
- symtab_hdr
->sh_info
];
884 while (h
->root
.type
== bfd_link_hash_indirect
885 || h
->root
.type
== bfd_link_hash_warning
)
886 h
= (struct elf_link_hash_entry
*) h
->root
.u
.i
.link
;
889 switch (ELF32_R_TYPE (rel
->r_info
))
892 if (h
!= NULL
&& h
->got
.refcount
> 0)
903 if (h
!= NULL
&& h
->plt
.refcount
> 0)
915 /* Adjust a symbol defined by a dynamic object and referenced by a
916 regular object. The current definition is in some section of the
917 dynamic object, but we're not including those sections. We have to
918 change the definition to something the rest of the link can
922 elf_vax_adjust_dynamic_symbol (struct bfd_link_info
*info
,
923 struct elf_link_hash_entry
*h
)
928 dynobj
= elf_hash_table (info
)->dynobj
;
930 /* Make sure we know what is going on here. */
931 BFD_ASSERT (dynobj
!= NULL
933 || h
->u
.weakdef
!= NULL
936 && !h
->def_regular
)));
938 /* If this is a function, put it in the procedure linkage table. We
939 will fill in the contents of the procedure linkage table later,
940 when we know the address of the .got section. */
941 if (h
->type
== STT_FUNC
944 if (h
->plt
.refcount
<= 0
945 || SYMBOL_CALLS_LOCAL (info
, h
)
946 || (ELF_ST_VISIBILITY (h
->other
) != STV_DEFAULT
947 && h
->root
.type
== bfd_link_hash_undefweak
))
949 /* This case can occur if we saw a PLTxx reloc in an input
950 file, but the symbol was never referred to by a dynamic
951 object, or if all references were garbage collected. In
952 such a case, we don't actually need to build a procedure
953 linkage table, and we can just do a PCxx reloc instead. */
954 h
->plt
.offset
= (bfd_vma
) -1;
959 s
= bfd_get_linker_section (dynobj
, ".plt");
960 BFD_ASSERT (s
!= NULL
);
962 /* If this is the first .plt entry, make room for the special
966 s
->size
+= PLT_ENTRY_SIZE
;
969 /* If this symbol is not defined in a regular file, and we are
970 not generating a shared library, then set the symbol to this
971 location in the .plt. This is required to make function
972 pointers compare as equal between the normal executable and
973 the shared library. */
977 h
->root
.u
.def
.section
= s
;
978 h
->root
.u
.def
.value
= s
->size
;
981 h
->plt
.offset
= s
->size
;
983 /* Make room for this entry. */
984 s
->size
+= PLT_ENTRY_SIZE
;
986 /* We also need to make an entry in the .got.plt section, which
987 will be placed in the .got section by the linker script. */
989 s
= bfd_get_linker_section (dynobj
, ".got.plt");
990 BFD_ASSERT (s
!= NULL
);
993 /* We also need to make an entry in the .rela.plt section. */
995 s
= bfd_get_linker_section (dynobj
, ".rela.plt");
996 BFD_ASSERT (s
!= NULL
);
997 s
->size
+= sizeof (Elf32_External_Rela
);
1002 /* Reinitialize the plt offset now that it is not used as a reference
1004 h
->plt
.offset
= (bfd_vma
) -1;
1006 /* If this is a weak symbol, and there is a real definition, the
1007 processor independent code will have arranged for us to see the
1008 real definition first, and we can just use the same value. */
1009 if (h
->u
.weakdef
!= NULL
)
1011 BFD_ASSERT (h
->u
.weakdef
->root
.type
== bfd_link_hash_defined
1012 || h
->u
.weakdef
->root
.type
== bfd_link_hash_defweak
);
1013 h
->root
.u
.def
.section
= h
->u
.weakdef
->root
.u
.def
.section
;
1014 h
->root
.u
.def
.value
= h
->u
.weakdef
->root
.u
.def
.value
;
1018 /* This is a reference to a symbol defined by a dynamic object which
1019 is not a function. */
1021 /* If we are creating a shared library, we must presume that the
1022 only references to the symbol are via the global offset table.
1023 For such cases we need not do anything here; the relocations will
1024 be handled correctly by relocate_section. */
1028 /* We must allocate the symbol in our .dynbss section, which will
1029 become part of the .bss section of the executable. There will be
1030 an entry for this symbol in the .dynsym section. The dynamic
1031 object will contain position independent code, so all references
1032 from the dynamic object to this symbol will go through the global
1033 offset table. The dynamic linker will use the .dynsym entry to
1034 determine the address it must put in the global offset table, so
1035 both the dynamic object and the regular object will refer to the
1036 same memory location for the variable. */
1038 s
= bfd_get_linker_section (dynobj
, ".dynbss");
1039 BFD_ASSERT (s
!= NULL
);
1041 /* We must generate a R_VAX_COPY reloc to tell the dynamic linker to
1042 copy the initial value out of the dynamic object and into the
1043 runtime process image. We need to remember the offset into the
1044 .rela.bss section we are going to use. */
1045 if ((h
->root
.u
.def
.section
->flags
& SEC_ALLOC
) != 0 && h
->size
!= 0)
1049 srel
= bfd_get_linker_section (dynobj
, ".rela.bss");
1050 BFD_ASSERT (srel
!= NULL
);
1051 srel
->size
+= sizeof (Elf32_External_Rela
);
1055 return _bfd_elf_adjust_dynamic_copy (info
, h
, s
);
1058 /* This function is called via elf_link_hash_traverse. It resets GOT
1059 and PLT (.GOT) reference counts back to -1 so normal PC32 relocation
1063 elf_vax_discard_got_entries (struct elf_link_hash_entry
*h
,
1064 void *infoptr ATTRIBUTE_UNUSED
)
1066 h
->got
.refcount
= -1;
1067 h
->plt
.refcount
= -1;
1072 /* Discard unused dynamic data if this is a static link. */
1075 elf_vax_always_size_sections (bfd
*output_bfd ATTRIBUTE_UNUSED
,
1076 struct bfd_link_info
*info
)
1081 dynobj
= elf_hash_table (info
)->dynobj
;
1083 if (dynobj
&& !elf_hash_table (info
)->dynamic_sections_created
)
1085 /* We may have created entries in the .rela.got and .got sections.
1086 However, if we are not creating the dynamic sections, we will
1087 not actually use these entries. Reset the size of .rela.got
1088 and .got, which will cause them to get stripped from the output
1090 s
= bfd_get_linker_section (dynobj
, ".rela.got");
1093 s
= bfd_get_linker_section (dynobj
, ".got.plt");
1096 s
= bfd_get_linker_section (dynobj
, ".got");
1101 /* If this is a static link, we need to discard all the got entries we've
1103 if (!dynobj
|| !elf_hash_table (info
)->dynamic_sections_created
)
1104 elf_link_hash_traverse (elf_hash_table (info
),
1105 elf_vax_discard_got_entries
,
1111 /* Set the sizes of the dynamic sections. */
1114 elf_vax_size_dynamic_sections (bfd
*output_bfd
, struct bfd_link_info
*info
)
1120 bfd_boolean reltext
;
1122 dynobj
= elf_hash_table (info
)->dynobj
;
1123 BFD_ASSERT (dynobj
!= NULL
);
1125 if (elf_hash_table (info
)->dynamic_sections_created
)
1127 /* Set the contents of the .interp section to the interpreter. */
1128 if (info
->executable
)
1130 s
= bfd_get_linker_section (dynobj
, ".interp");
1131 BFD_ASSERT (s
!= NULL
);
1132 s
->size
= sizeof ELF_DYNAMIC_INTERPRETER
;
1133 s
->contents
= (unsigned char *) ELF_DYNAMIC_INTERPRETER
;
1137 /* If this is a -Bsymbolic shared link, then we need to discard all PC
1138 relative relocs against symbols defined in a regular object. We
1139 allocated space for them in the check_relocs routine, but we will not
1140 fill them in in the relocate_section routine. */
1141 if (info
->shared
&& info
->symbolic
)
1142 elf_vax_link_hash_traverse (elf_hash_table (info
),
1143 elf_vax_discard_copies
,
1146 /* If this is a -Bsymbolic shared link, we need to discard all the got
1147 entries we've recorded. Otherwise, we need to instantiate (allocate
1149 elf_link_hash_traverse (elf_hash_table (info
),
1150 elf_vax_instantiate_got_entries
,
1153 /* The check_relocs and adjust_dynamic_symbol entry points have
1154 determined the sizes of the various dynamic sections. Allocate
1159 for (s
= dynobj
->sections
; s
!= NULL
; s
= s
->next
)
1163 if ((s
->flags
& SEC_LINKER_CREATED
) == 0)
1166 /* It's OK to base decisions on the section name, because none
1167 of the dynobj section names depend upon the input files. */
1168 name
= bfd_get_section_name (dynobj
, s
);
1170 if (strcmp (name
, ".plt") == 0)
1172 /* Remember whether there is a PLT. */
1175 else if (CONST_STRNEQ (name
, ".rela"))
1181 /* Remember whether there are any reloc sections other
1183 if (strcmp (name
, ".rela.plt") != 0)
1185 const char *outname
;
1189 /* If this relocation section applies to a read only
1190 section, then we probably need a DT_TEXTREL
1191 entry. .rela.plt is actually associated with
1192 .got.plt, which is never readonly. */
1193 outname
= bfd_get_section_name (output_bfd
,
1195 target
= bfd_get_section_by_name (output_bfd
, outname
+ 5);
1197 && (target
->flags
& SEC_READONLY
) != 0
1198 && (target
->flags
& SEC_ALLOC
) != 0)
1202 /* We use the reloc_count field as a counter if we need
1203 to copy relocs into the output file. */
1207 else if (! CONST_STRNEQ (name
, ".got")
1208 && strcmp (name
, ".dynbss") != 0)
1210 /* It's not one of our sections, so don't allocate space. */
1216 /* If we don't need this section, strip it from the
1217 output file. This is mostly to handle .rela.bss and
1218 .rela.plt. We must create both sections in
1219 create_dynamic_sections, because they must be created
1220 before the linker maps input sections to output
1221 sections. The linker does that before
1222 adjust_dynamic_symbol is called, and it is that
1223 function which decides whether anything needs to go
1224 into these sections. */
1225 s
->flags
|= SEC_EXCLUDE
;
1229 if ((s
->flags
& SEC_HAS_CONTENTS
) == 0)
1232 /* Allocate memory for the section contents. */
1233 s
->contents
= (bfd_byte
*) bfd_zalloc (dynobj
, s
->size
);
1234 if (s
->contents
== NULL
)
1238 if (elf_hash_table (info
)->dynamic_sections_created
)
1240 /* Add some entries to the .dynamic section. We fill in the
1241 values later, in elf_vax_finish_dynamic_sections, but we
1242 must add the entries now so that we get the correct size for
1243 the .dynamic section. The DT_DEBUG entry is filled in by the
1244 dynamic linker and used by the debugger. */
1245 #define add_dynamic_entry(TAG, VAL) \
1246 _bfd_elf_add_dynamic_entry (info, TAG, VAL)
1250 if (!add_dynamic_entry (DT_DEBUG
, 0))
1256 if (!add_dynamic_entry (DT_PLTGOT
, 0)
1257 || !add_dynamic_entry (DT_PLTRELSZ
, 0)
1258 || !add_dynamic_entry (DT_PLTREL
, DT_RELA
)
1259 || !add_dynamic_entry (DT_JMPREL
, 0))
1265 if (!add_dynamic_entry (DT_RELA
, 0)
1266 || !add_dynamic_entry (DT_RELASZ
, 0)
1267 || !add_dynamic_entry (DT_RELAENT
, sizeof (Elf32_External_Rela
)))
1271 if (reltext
|| (info
->flags
& DF_TEXTREL
) != 0)
1273 if (!add_dynamic_entry (DT_TEXTREL
, 0))
1277 #undef add_dynamic_entry
1282 /* This function is called via elf_vax_link_hash_traverse if we are
1283 creating a shared object with -Bsymbolic. It discards the space
1284 allocated to copy PC relative relocs against symbols which are defined
1285 in regular objects. We allocated space for them in the check_relocs
1286 routine, but we won't fill them in in the relocate_section routine. */
1289 elf_vax_discard_copies (struct elf_vax_link_hash_entry
*h
,
1290 void * ignore ATTRIBUTE_UNUSED
)
1292 struct elf_vax_pcrel_relocs_copied
*s
;
1294 /* We only discard relocs for symbols defined in a regular object. */
1295 if (!h
->root
.def_regular
)
1298 for (s
= h
->pcrel_relocs_copied
; s
!= NULL
; s
= s
->next
)
1299 s
->section
->size
-= s
->count
* sizeof (Elf32_External_Rela
);
1304 /* This function is called via elf_link_hash_traverse. It looks for
1305 entries that have GOT or PLT (.GOT) references. If creating a shared
1306 object with -Bsymbolic, or the symbol has been forced local, then it
1307 resets the reference count back to -1 so normal PC32 relocation will
1308 be done. Otherwise space in the .got and .rela.got will be reserved
1312 elf_vax_instantiate_got_entries (struct elf_link_hash_entry
*h
, void * infoptr
)
1314 struct bfd_link_info
*info
= (struct bfd_link_info
*) infoptr
;
1319 /* We don't care about non-GOT (and non-PLT) entries. */
1320 if (h
->got
.refcount
<= 0 && h
->plt
.refcount
<= 0)
1323 dynobj
= elf_hash_table (info
)->dynobj
;
1324 BFD_ASSERT (dynobj
!= NULL
);
1326 sgot
= bfd_get_linker_section (dynobj
, ".got");
1327 srelgot
= bfd_get_linker_section (dynobj
, ".rela.got");
1329 if (SYMBOL_REFERENCES_LOCAL (info
, h
))
1331 h
->got
.refcount
= -1;
1332 h
->plt
.refcount
= -1;
1334 else if (h
->got
.refcount
> 0)
1336 /* Make sure this symbol is output as a dynamic symbol. */
1337 if (h
->dynindx
== -1)
1339 if (!bfd_elf_link_record_dynamic_symbol (info
, h
))
1343 /* Allocate space in the .got and .rela.got sections. */
1345 srelgot
->size
+= sizeof (Elf32_External_Rela
);
1351 /* Relocate an VAX ELF section. */
1354 elf_vax_relocate_section (bfd
*output_bfd
,
1355 struct bfd_link_info
*info
,
1357 asection
*input_section
,
1359 Elf_Internal_Rela
*relocs
,
1360 Elf_Internal_Sym
*local_syms
,
1361 asection
**local_sections
)
1364 Elf_Internal_Shdr
*symtab_hdr
;
1365 struct elf_link_hash_entry
**sym_hashes
;
1372 Elf_Internal_Rela
*rel
;
1373 Elf_Internal_Rela
*relend
;
1375 dynobj
= elf_hash_table (info
)->dynobj
;
1376 symtab_hdr
= &elf_tdata (input_bfd
)->symtab_hdr
;
1377 sym_hashes
= elf_sym_hashes (input_bfd
);
1385 relend
= relocs
+ input_section
->reloc_count
;
1386 for (; rel
< relend
; rel
++)
1389 reloc_howto_type
*howto
;
1390 unsigned long r_symndx
;
1391 struct elf_link_hash_entry
*h
;
1392 Elf_Internal_Sym
*sym
;
1395 bfd_reloc_status_type r
;
1397 r_type
= ELF32_R_TYPE (rel
->r_info
);
1398 if (r_type
< 0 || r_type
>= (int) R_VAX_max
)
1400 bfd_set_error (bfd_error_bad_value
);
1403 howto
= howto_table
+ r_type
;
1405 r_symndx
= ELF32_R_SYM (rel
->r_info
);
1409 if (r_symndx
< symtab_hdr
->sh_info
)
1411 sym
= local_syms
+ r_symndx
;
1412 sec
= local_sections
[r_symndx
];
1413 relocation
= _bfd_elf_rela_local_sym (output_bfd
, sym
, &sec
, rel
);
1417 bfd_boolean unresolved_reloc
;
1418 bfd_boolean warned
, ignored
;
1420 RELOC_FOR_GLOBAL_SYMBOL (info
, input_bfd
, input_section
, rel
,
1421 r_symndx
, symtab_hdr
, sym_hashes
,
1423 unresolved_reloc
, warned
, ignored
);
1425 if ((h
->root
.type
== bfd_link_hash_defined
1426 || h
->root
.type
== bfd_link_hash_defweak
)
1427 && ((r_type
== R_VAX_PLT32
1428 && h
->plt
.offset
!= (bfd_vma
) -1
1430 && elf_hash_table (info
)->dynamic_sections_created
)
1431 || (r_type
== R_VAX_GOT32
1432 && h
->got
.offset
!= (bfd_vma
) -1
1434 && elf_hash_table (info
)->dynamic_sections_created
1436 || (! info
->symbolic
&& h
->dynindx
!= -1)
1437 || !h
->def_regular
))
1439 && ((! info
->symbolic
&& h
->dynindx
!= -1)
1441 && ((input_section
->flags
& SEC_ALLOC
) != 0
1442 /* DWARF will emit R_VAX_32 relocations in its
1443 sections against symbols defined externally
1444 in shared libraries. We can't do anything
1447 || ((input_section
->flags
& SEC_DEBUGGING
) != 0
1449 && (r_type
== R_VAX_8
1450 || r_type
== R_VAX_16
1451 || r_type
== R_VAX_32
))))
1452 /* In these cases, we don't need the relocation
1453 value. We check specially because in some
1454 obscure cases sec->output_section will be NULL. */
1458 if (sec
!= NULL
&& discarded_section (sec
))
1459 RELOC_AGAINST_DISCARDED_SECTION (info
, input_bfd
, input_section
,
1460 rel
, 1, relend
, howto
, 0, contents
);
1462 if (info
->relocatable
)
1468 /* Relocation is to the address of the entry for this symbol
1469 in the global offset table. */
1471 /* Resolve a GOTxx reloc against a local symbol directly,
1472 without using the global offset table. */
1474 || h
->got
.offset
== (bfd_vma
) -1)
1482 sgot
= bfd_get_linker_section (dynobj
, ".got");
1483 BFD_ASSERT (sgot
!= NULL
);
1486 off
= h
->got
.offset
;
1487 BFD_ASSERT (off
< sgot
->size
);
1489 bfd_put_32 (output_bfd
, rel
->r_addend
, sgot
->contents
+ off
);
1491 relocation
= sgot
->output_offset
+ off
;
1492 /* The GOT relocation uses the addend. */
1495 /* Change the reference to be indirect. */
1496 contents
[rel
->r_offset
- 1] |= 0x10;
1497 relocation
+= sgot
->output_section
->vma
;
1502 /* If we are creating an executable and the function this
1503 reloc refers to is in a shared lib, then we made a PLT
1504 entry for this symbol and need to handle the reloc like
1507 goto r_vax_pc32_shared
;
1510 /* Relocation is to the entry for this symbol in the
1511 procedure linkage table. */
1513 /* Resolve a PLTxx reloc against a local symbol directly,
1514 without using the procedure linkage table. */
1516 || h
->plt
.offset
== (bfd_vma
) -1)
1521 splt
= bfd_get_linker_section (dynobj
, ".plt");
1522 BFD_ASSERT (splt
!= NULL
);
1525 if (sgotplt
== NULL
)
1527 sgotplt
= bfd_get_linker_section (dynobj
, ".got.plt");
1528 BFD_ASSERT (sgotplt
!= NULL
);
1531 plt_index
= h
->plt
.offset
/ PLT_ENTRY_SIZE
- 1;
1533 /* Get the offset into the .got table of the entry that
1534 corresponds to this function. Each .got entry is 4 bytes.
1535 The first two are reserved. */
1536 got_offset
= (plt_index
+ 3) * 4;
1538 /* We want the relocation to point into the .got.plt instead
1539 of the plt itself. */
1540 relocation
= (sgotplt
->output_section
->vma
1541 + sgotplt
->output_offset
1543 contents
[rel
->r_offset
-1] |= 0x10; /* make indirect */
1544 if (rel
->r_addend
== 2)
1548 else if (rel
->r_addend
!= 0)
1549 (*_bfd_error_handler
)
1550 (_("%s: warning: PLT addend of %d to `%s' from %s section ignored"),
1551 bfd_get_filename (input_bfd
), rel
->r_addend
,
1552 h
->root
.root
.string
,
1553 bfd_get_section_name (input_bfd
, input_section
));
1562 || ELF_ST_VISIBILITY (h
->other
) != STV_DEFAULT
1570 && r_symndx
!= STN_UNDEF
1571 && (input_section
->flags
& SEC_ALLOC
) != 0
1572 && ((r_type
!= R_VAX_PC8
1573 && r_type
!= R_VAX_PC16
1574 && r_type
!= R_VAX_PC32
)
1575 || ((input_section
->flags
& SEC_CODE
)
1577 || (!h
->def_regular
&& h
->type
!= STT_SECTION
)))))
1579 Elf_Internal_Rela outrel
;
1581 bfd_boolean skip
, relocate
;
1583 /* When generating a shared object, these relocations
1584 are copied into the output file to be resolved at run
1588 sreloc
= _bfd_elf_get_dynamic_reloc_section
1589 (input_bfd
, input_section
, /*rela?*/ TRUE
);
1598 _bfd_elf_section_offset (output_bfd
, info
, input_section
,
1600 if (outrel
.r_offset
== (bfd_vma
) -1)
1602 if (outrel
.r_offset
== (bfd_vma
) -2)
1603 skip
= TRUE
, relocate
= TRUE
;
1604 outrel
.r_offset
+= (input_section
->output_section
->vma
1605 + input_section
->output_offset
);
1608 memset (&outrel
, 0, sizeof outrel
);
1609 /* h->dynindx may be -1 if the symbol was marked to
1612 && ((! info
->symbolic
&& h
->dynindx
!= -1)
1613 || !h
->def_regular
))
1615 BFD_ASSERT (h
->dynindx
!= -1);
1616 outrel
.r_info
= ELF32_R_INFO (h
->dynindx
, r_type
);
1617 outrel
.r_addend
= relocation
+ rel
->r_addend
;
1621 if (r_type
== R_VAX_32
)
1624 outrel
.r_info
= ELF32_R_INFO (0, R_VAX_RELATIVE
);
1625 BFD_ASSERT (bfd_get_signed_32 (input_bfd
,
1626 &contents
[rel
->r_offset
]) == 0);
1627 outrel
.r_addend
= relocation
+ rel
->r_addend
;
1633 if (bfd_is_abs_section (sec
))
1635 else if (sec
== NULL
|| sec
->owner
== NULL
)
1637 bfd_set_error (bfd_error_bad_value
);
1644 /* We are turning this relocation into one
1645 against a section symbol. It would be
1646 proper to subtract the symbol's value,
1647 osec->vma, from the emitted reloc addend,
1648 but ld.so expects buggy relocs. */
1649 osec
= sec
->output_section
;
1650 indx
= elf_section_data (osec
)->dynindx
;
1653 struct elf_link_hash_table
*htab
;
1654 htab
= elf_hash_table (info
);
1655 osec
= htab
->text_index_section
;
1656 indx
= elf_section_data (osec
)->dynindx
;
1658 BFD_ASSERT (indx
!= 0);
1661 outrel
.r_info
= ELF32_R_INFO (indx
, r_type
);
1662 outrel
.r_addend
= relocation
+ rel
->r_addend
;
1666 if ((input_section
->flags
& SEC_CODE
) != 0
1667 || (ELF32_R_TYPE (outrel
.r_info
) != R_VAX_32
1668 && ELF32_R_TYPE (outrel
.r_info
) != R_VAX_RELATIVE
1669 && ELF32_R_TYPE (outrel
.r_info
) != R_VAX_COPY
1670 && ELF32_R_TYPE (outrel
.r_info
) != R_VAX_JMP_SLOT
1671 && ELF32_R_TYPE (outrel
.r_info
) != R_VAX_GLOB_DAT
))
1674 (*_bfd_error_handler
)
1675 (_("%s: warning: %s relocation against symbol `%s' from %s section"),
1676 bfd_get_filename (input_bfd
), howto
->name
,
1677 h
->root
.root
.string
,
1678 bfd_get_section_name (input_bfd
, input_section
));
1680 (*_bfd_error_handler
)
1681 (_("%s: warning: %s relocation to 0x%x from %s section"),
1682 bfd_get_filename (input_bfd
), howto
->name
,
1684 bfd_get_section_name (input_bfd
, input_section
));
1686 loc
= sreloc
->contents
;
1687 loc
+= sreloc
->reloc_count
++ * sizeof (Elf32_External_Rela
);
1688 bfd_elf32_swap_reloca_out (output_bfd
, &outrel
, loc
);
1690 /* This reloc will be computed at runtime, so there's no
1691 need to do anything now, except for R_VAX_32
1692 relocations that have been turned into
1700 case R_VAX_GNU_VTINHERIT
:
1701 case R_VAX_GNU_VTENTRY
:
1702 /* These are no-ops in the end. */
1709 /* VAX PCREL relocations are from the end of relocation, not the start.
1710 So subtract the difference from the relocation amount since we can't
1711 add it to the offset. */
1712 if (howto
->pc_relative
&& howto
->pcrel_offset
)
1713 relocation
-= bfd_get_reloc_size(howto
);
1715 r
= _bfd_final_link_relocate (howto
, input_bfd
, input_section
,
1716 contents
, rel
->r_offset
,
1717 relocation
, rel
->r_addend
);
1719 if (r
!= bfd_reloc_ok
)
1724 case bfd_reloc_outofrange
:
1726 case bfd_reloc_overflow
:
1734 name
= bfd_elf_string_from_elf_section (input_bfd
,
1735 symtab_hdr
->sh_link
,
1740 name
= bfd_section_name (input_bfd
, sec
);
1742 if (!(info
->callbacks
->reloc_overflow
1743 (info
, (h
? &h
->root
: NULL
), name
, howto
->name
,
1744 (bfd_vma
) 0, input_bfd
, input_section
,
1756 /* Finish up dynamic symbol handling. We set the contents of various
1757 dynamic sections here. */
1760 elf_vax_finish_dynamic_symbol (bfd
*output_bfd
, struct bfd_link_info
*info
,
1761 struct elf_link_hash_entry
*h
,
1762 Elf_Internal_Sym
*sym
)
1766 dynobj
= elf_hash_table (info
)->dynobj
;
1768 if (h
->plt
.offset
!= (bfd_vma
) -1)
1776 Elf_Internal_Rela rela
;
1779 /* This symbol has an entry in the procedure linkage table. Set
1781 BFD_ASSERT (h
->dynindx
!= -1);
1783 splt
= bfd_get_linker_section (dynobj
, ".plt");
1784 sgot
= bfd_get_linker_section (dynobj
, ".got.plt");
1785 srela
= bfd_get_linker_section (dynobj
, ".rela.plt");
1786 BFD_ASSERT (splt
!= NULL
&& sgot
!= NULL
&& srela
!= NULL
);
1788 addend
= 2 * (h
->plt
.offset
& 1);
1789 h
->plt
.offset
&= ~1;
1791 /* Get the index in the procedure linkage table which
1792 corresponds to this symbol. This is the index of this symbol
1793 in all the symbols for which we are making plt entries. The
1794 first entry in the procedure linkage table is reserved. */
1795 plt_index
= h
->plt
.offset
/ PLT_ENTRY_SIZE
- 1;
1797 /* Get the offset into the .got table of the entry that
1798 corresponds to this function. Each .got entry is 4 bytes.
1799 The first two are reserved. */
1800 got_offset
= (plt_index
+ 3) * 4;
1802 /* Fill in the entry in the procedure linkage table. */
1803 memcpy (splt
->contents
+ h
->plt
.offset
, elf_vax_plt_entry
,
1806 /* The offset is relative to the first extension word. */
1807 bfd_put_32 (output_bfd
,
1808 -(h
->plt
.offset
+ 8),
1809 splt
->contents
+ h
->plt
.offset
+ 4);
1811 bfd_put_32 (output_bfd
, plt_index
* sizeof (Elf32_External_Rela
),
1812 splt
->contents
+ h
->plt
.offset
+ 8);
1814 /* Fill in the entry in the global offset table. */
1815 bfd_put_32 (output_bfd
,
1816 (splt
->output_section
->vma
1817 + splt
->output_offset
1818 + h
->plt
.offset
) + addend
,
1819 sgot
->contents
+ got_offset
);
1821 /* Fill in the entry in the .rela.plt section. */
1822 rela
.r_offset
= (sgot
->output_section
->vma
1823 + sgot
->output_offset
1825 rela
.r_info
= ELF32_R_INFO (h
->dynindx
, R_VAX_JMP_SLOT
);
1826 rela
.r_addend
= addend
;
1827 loc
= srela
->contents
+ plt_index
* sizeof (Elf32_External_Rela
);
1828 bfd_elf32_swap_reloca_out (output_bfd
, &rela
, loc
);
1830 if (!h
->def_regular
)
1832 /* Mark the symbol as undefined, rather than as defined in
1833 the .plt section. Leave the value alone. */
1834 sym
->st_shndx
= SHN_UNDEF
;
1838 if (h
->got
.offset
!= (bfd_vma
) -1)
1842 Elf_Internal_Rela rela
;
1845 /* This symbol has an entry in the global offset table. Set it
1847 sgot
= bfd_get_linker_section (dynobj
, ".got");
1848 srela
= bfd_get_linker_section (dynobj
, ".rela.got");
1849 BFD_ASSERT (sgot
!= NULL
&& srela
!= NULL
);
1851 rela
.r_offset
= (sgot
->output_section
->vma
1852 + sgot
->output_offset
1854 rela
.r_info
= ELF32_R_INFO (h
->dynindx
, R_VAX_GLOB_DAT
);
1855 rela
.r_addend
= bfd_get_signed_32 (output_bfd
,
1856 sgot
->contents
+ h
->got
.offset
);
1858 loc
= srela
->contents
;
1859 loc
+= srela
->reloc_count
++ * sizeof (Elf32_External_Rela
);
1860 bfd_elf32_swap_reloca_out (output_bfd
, &rela
, loc
);
1866 Elf_Internal_Rela rela
;
1869 /* This symbol needs a copy reloc. Set it up. */
1870 BFD_ASSERT (h
->dynindx
!= -1
1871 && (h
->root
.type
== bfd_link_hash_defined
1872 || h
->root
.type
== bfd_link_hash_defweak
));
1874 s
= bfd_get_linker_section (dynobj
, ".rela.bss");
1875 BFD_ASSERT (s
!= NULL
);
1877 rela
.r_offset
= (h
->root
.u
.def
.value
1878 + h
->root
.u
.def
.section
->output_section
->vma
1879 + h
->root
.u
.def
.section
->output_offset
);
1880 rela
.r_info
= ELF32_R_INFO (h
->dynindx
, R_VAX_COPY
);
1882 loc
= s
->contents
+ s
->reloc_count
++ * sizeof (Elf32_External_Rela
);
1883 bfd_elf32_swap_reloca_out (output_bfd
, &rela
, loc
);
1886 /* Mark _DYNAMIC and _GLOBAL_OFFSET_TABLE_ as absolute. */
1887 if (h
== elf_hash_table (info
)->hdynamic
1888 || h
== elf_hash_table (info
)->hgot
)
1889 sym
->st_shndx
= SHN_ABS
;
1894 /* Finish up the dynamic sections. */
1897 elf_vax_finish_dynamic_sections (bfd
*output_bfd
, struct bfd_link_info
*info
)
1903 dynobj
= elf_hash_table (info
)->dynobj
;
1905 sgot
= bfd_get_linker_section (dynobj
, ".got.plt");
1906 BFD_ASSERT (sgot
!= NULL
);
1907 sdyn
= bfd_get_linker_section (dynobj
, ".dynamic");
1909 if (elf_hash_table (info
)->dynamic_sections_created
)
1912 Elf32_External_Dyn
*dyncon
, *dynconend
;
1914 splt
= bfd_get_linker_section (dynobj
, ".plt");
1915 BFD_ASSERT (splt
!= NULL
&& sdyn
!= NULL
);
1917 dyncon
= (Elf32_External_Dyn
*) sdyn
->contents
;
1918 dynconend
= (Elf32_External_Dyn
*) (sdyn
->contents
+ sdyn
->size
);
1919 for (; dyncon
< dynconend
; dyncon
++)
1921 Elf_Internal_Dyn dyn
;
1925 bfd_elf32_swap_dyn_in (dynobj
, dyncon
, &dyn
);
1938 s
= bfd_get_section_by_name (output_bfd
, name
);
1939 BFD_ASSERT (s
!= NULL
);
1940 dyn
.d_un
.d_ptr
= s
->vma
;
1941 bfd_elf32_swap_dyn_out (output_bfd
, &dyn
, dyncon
);
1945 s
= bfd_get_section_by_name (output_bfd
, ".rela.plt");
1946 BFD_ASSERT (s
!= NULL
);
1947 dyn
.d_un
.d_val
= s
->size
;
1948 bfd_elf32_swap_dyn_out (output_bfd
, &dyn
, dyncon
);
1952 /* The procedure linkage table relocs (DT_JMPREL) should
1953 not be included in the overall relocs (DT_RELA).
1954 Therefore, we override the DT_RELASZ entry here to
1955 make it not include the JMPREL relocs. Since the
1956 linker script arranges for .rela.plt to follow all
1957 other relocation sections, we don't have to worry
1958 about changing the DT_RELA entry. */
1959 s
= bfd_get_section_by_name (output_bfd
, ".rela.plt");
1961 dyn
.d_un
.d_val
-= s
->size
;
1962 bfd_elf32_swap_dyn_out (output_bfd
, &dyn
, dyncon
);
1967 /* Fill in the first entry in the procedure linkage table. */
1970 memcpy (splt
->contents
, elf_vax_plt0_entry
, PLT_ENTRY_SIZE
);
1971 bfd_put_32 (output_bfd
,
1972 (sgot
->output_section
->vma
1973 + sgot
->output_offset
+ 4
1974 - (splt
->output_section
->vma
+ 6)),
1975 splt
->contents
+ 2);
1976 bfd_put_32 (output_bfd
,
1977 (sgot
->output_section
->vma
1978 + sgot
->output_offset
+ 8
1979 - (splt
->output_section
->vma
+ 12)),
1980 splt
->contents
+ 8);
1981 elf_section_data (splt
->output_section
)->this_hdr
.sh_entsize
1986 /* Fill in the first three entries in the global offset table. */
1990 bfd_put_32 (output_bfd
, (bfd_vma
) 0, sgot
->contents
);
1992 bfd_put_32 (output_bfd
,
1993 sdyn
->output_section
->vma
+ sdyn
->output_offset
,
1995 bfd_put_32 (output_bfd
, (bfd_vma
) 0, sgot
->contents
+ 4);
1996 bfd_put_32 (output_bfd
, (bfd_vma
) 0, sgot
->contents
+ 8);
1999 if (elf_section_data (sgot
->output_section
) != NULL
)
2000 elf_section_data (sgot
->output_section
)->this_hdr
.sh_entsize
= 4;
2005 static enum elf_reloc_type_class
2006 elf_vax_reloc_type_class (const struct bfd_link_info
*info ATTRIBUTE_UNUSED
,
2007 const asection
*rel_sec ATTRIBUTE_UNUSED
,
2008 const Elf_Internal_Rela
*rela
)
2010 switch ((int) ELF32_R_TYPE (rela
->r_info
))
2012 case R_VAX_RELATIVE
:
2013 return reloc_class_relative
;
2014 case R_VAX_JMP_SLOT
:
2015 return reloc_class_plt
;
2017 return reloc_class_copy
;
2019 return reloc_class_normal
;
2024 elf_vax_plt_sym_val (bfd_vma i
, const asection
*plt
,
2025 const arelent
*rel ATTRIBUTE_UNUSED
)
2027 return plt
->vma
+ (i
+ 1) * PLT_ENTRY_SIZE
;
2030 #define TARGET_LITTLE_SYM vax_elf32_vec
2031 #define TARGET_LITTLE_NAME "elf32-vax"
2032 #define ELF_MACHINE_CODE EM_VAX
2033 #define ELF_MAXPAGESIZE 0x1000
2035 #define elf_backend_create_dynamic_sections \
2036 _bfd_elf_create_dynamic_sections
2037 #define bfd_elf32_bfd_link_hash_table_create \
2038 elf_vax_link_hash_table_create
2039 #define bfd_elf32_bfd_final_link bfd_elf_gc_common_final_link
2041 #define elf_backend_check_relocs elf_vax_check_relocs
2042 #define elf_backend_adjust_dynamic_symbol \
2043 elf_vax_adjust_dynamic_symbol
2044 #define elf_backend_always_size_sections \
2045 elf_vax_always_size_sections
2046 #define elf_backend_size_dynamic_sections \
2047 elf_vax_size_dynamic_sections
2048 #define elf_backend_init_index_section _bfd_elf_init_1_index_section
2049 #define elf_backend_relocate_section elf_vax_relocate_section
2050 #define elf_backend_finish_dynamic_symbol \
2051 elf_vax_finish_dynamic_symbol
2052 #define elf_backend_finish_dynamic_sections \
2053 elf_vax_finish_dynamic_sections
2054 #define elf_backend_reloc_type_class elf_vax_reloc_type_class
2055 #define elf_backend_gc_mark_hook elf_vax_gc_mark_hook
2056 #define elf_backend_gc_sweep_hook elf_vax_gc_sweep_hook
2057 #define elf_backend_plt_sym_val elf_vax_plt_sym_val
2058 #define bfd_elf32_bfd_merge_private_bfd_data \
2059 elf32_vax_merge_private_bfd_data
2060 #define bfd_elf32_bfd_set_private_flags \
2061 elf32_vax_set_private_flags
2062 #define bfd_elf32_bfd_print_private_bfd_data \
2063 elf32_vax_print_private_bfd_data
2065 #define elf_backend_can_gc_sections 1
2066 #define elf_backend_want_got_plt 1
2067 #define elf_backend_plt_readonly 1
2068 #define elf_backend_want_plt_sym 0
2069 #define elf_backend_got_header_size 16
2070 #define elf_backend_rela_normal 1
2072 #include "elf32-target.h"