1 /* VAX series support for 32-bit ELF
2 Copyright (C) 1993-2018 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
;
593 switch (ELF32_R_TYPE (rel
->r_info
))
596 BFD_ASSERT (h
!= NULL
);
598 /* If this is a local symbol, we resolve it directly without
599 creating a global offset table entry. */
601 || h
== elf_hash_table (info
)->hgot
602 || h
== elf_hash_table (info
)->hplt
)
605 /* This symbol requires a global offset table entry. */
609 /* Create the .got section. */
610 elf_hash_table (info
)->dynobj
= dynobj
= abfd
;
611 if (!_bfd_elf_create_got_section (dynobj
, info
))
617 struct elf_vax_link_hash_entry
*eh
;
619 eh
= (struct elf_vax_link_hash_entry
*) h
;
620 if (h
->got
.refcount
== -1)
623 eh
->got_addend
= rel
->r_addend
;
628 if (eh
->got_addend
!= (bfd_vma
) rel
->r_addend
)
630 /* xgettext:c-format */
631 (_("%B: warning: GOT addend of %Ld to `%s' does"
632 " not match previous GOT addend of %Ld"),
633 abfd
, rel
->r_addend
, h
->root
.root
.string
,
641 /* This symbol requires a procedure linkage table entry. We
642 actually build the entry in adjust_dynamic_symbol,
643 because this might be a case of linking PIC code which is
644 never referenced by a dynamic object, in which case we
645 don't need to generate a procedure linkage table entry
647 BFD_ASSERT (h
!= NULL
);
649 /* If this is a local symbol, we resolve it directly without
650 creating a procedure linkage table entry. */
655 if (h
->plt
.refcount
== -1)
664 /* If we are creating a shared library and this is not a local
665 symbol, we need to copy the reloc into the shared library.
666 However when linking with -Bsymbolic and this is a global
667 symbol which is defined in an object we are including in the
668 link (i.e., DEF_REGULAR is set), then we can resolve the
669 reloc directly. At this point we have not seen all the input
670 files, so it is possible that DEF_REGULAR is not set now but
671 will be set later (it is never cleared). We account for that
672 possibility below by storing information in the
673 pcrel_relocs_copied field of the hash table entry. */
674 if (!(bfd_link_pic (info
)
675 && (sec
->flags
& SEC_ALLOC
) != 0
678 || !h
->def_regular
)))
681 && ELF_ST_VISIBILITY (h
->other
) == STV_DEFAULT
684 /* Make sure a plt entry is created for this symbol if
685 it turns out to be a function defined by a dynamic
687 if (h
->plt
.refcount
== -1)
694 /* If this is a local symbol, we can resolve it directly. */
696 && (ELF_ST_VISIBILITY (h
->other
) != STV_DEFAULT
704 if (h
!= NULL
&& ELF_ST_VISIBILITY (h
->other
) == STV_DEFAULT
)
706 /* Make sure a plt entry is created for this symbol if it
707 turns out to be a function defined by a dynamic object. */
708 if (h
->plt
.refcount
== -1)
714 /* If we are creating a shared library, we need to copy the
715 reloc into the shared library. */
716 if (bfd_link_pic (info
)
717 && (sec
->flags
& SEC_ALLOC
) != 0)
719 /* When creating a shared object, we must copy these
720 reloc types into the output file. We create a reloc
721 section in dynobj and make room for this reloc. */
724 sreloc
= _bfd_elf_make_dynamic_reloc_section
725 (sec
, dynobj
, 2, abfd
, /*rela?*/ TRUE
);
730 if (sec
->flags
& SEC_READONLY
)
731 info
->flags
|= DF_TEXTREL
;
734 sreloc
->size
+= sizeof (Elf32_External_Rela
);
736 /* If we are linking with -Bsymbolic, we count the number of
737 PC relative relocations we have entered for this symbol,
738 so that we can discard them again if the symbol is later
739 defined by a regular object. Note that this function is
740 only called if we are using a vaxelf linker hash table,
741 which means that h is really a pointer to an
742 elf_vax_link_hash_entry. */
743 if ((ELF32_R_TYPE (rel
->r_info
) == R_VAX_PC8
744 || ELF32_R_TYPE (rel
->r_info
) == R_VAX_PC16
745 || ELF32_R_TYPE (rel
->r_info
) == R_VAX_PC32
)
748 struct elf_vax_link_hash_entry
*eh
;
749 struct elf_vax_pcrel_relocs_copied
*p
;
751 eh
= (struct elf_vax_link_hash_entry
*) h
;
753 for (p
= eh
->pcrel_relocs_copied
; p
!= NULL
; p
= p
->next
)
754 if (p
->section
== sreloc
)
759 p
= ((struct elf_vax_pcrel_relocs_copied
*)
760 bfd_alloc (dynobj
, (bfd_size_type
) sizeof *p
));
763 p
->next
= eh
->pcrel_relocs_copied
;
764 eh
->pcrel_relocs_copied
= p
;
775 /* This relocation describes the C++ object vtable hierarchy.
776 Reconstruct it for later use during GC. */
777 case R_VAX_GNU_VTINHERIT
:
778 if (!bfd_elf_gc_record_vtinherit (abfd
, sec
, h
, rel
->r_offset
))
782 /* This relocation describes which C++ vtable entries are actually
783 used. Record for later use during GC. */
784 case R_VAX_GNU_VTENTRY
:
785 BFD_ASSERT (h
!= NULL
);
787 && !bfd_elf_gc_record_vtentry (abfd
, sec
, h
, rel
->r_addend
))
799 /* Return the section that should be marked against GC for a given
803 elf_vax_gc_mark_hook (asection
*sec
,
804 struct bfd_link_info
*info
,
805 Elf_Internal_Rela
*rel
,
806 struct elf_link_hash_entry
*h
,
807 Elf_Internal_Sym
*sym
)
810 switch (ELF32_R_TYPE (rel
->r_info
))
812 case R_VAX_GNU_VTINHERIT
:
813 case R_VAX_GNU_VTENTRY
:
817 return _bfd_elf_gc_mark_hook (sec
, info
, rel
, h
, sym
);
820 /* Adjust a symbol defined by a dynamic object and referenced by a
821 regular object. The current definition is in some section of the
822 dynamic object, but we're not including those sections. We have to
823 change the definition to something the rest of the link can
827 elf_vax_adjust_dynamic_symbol (struct bfd_link_info
*info
,
828 struct elf_link_hash_entry
*h
)
833 dynobj
= elf_hash_table (info
)->dynobj
;
835 /* Make sure we know what is going on here. */
836 BFD_ASSERT (dynobj
!= NULL
841 && !h
->def_regular
)));
843 /* If this is a function, put it in the procedure linkage table. We
844 will fill in the contents of the procedure linkage table later,
845 when we know the address of the .got section. */
846 if (h
->type
== STT_FUNC
849 if (h
->plt
.refcount
<= 0
850 || SYMBOL_CALLS_LOCAL (info
, h
)
851 || (ELF_ST_VISIBILITY (h
->other
) != STV_DEFAULT
852 && h
->root
.type
== bfd_link_hash_undefweak
))
854 /* This case can occur if we saw a PLTxx reloc in an input
855 file, but the symbol was never referred to by a dynamic
856 object, or if all references were garbage collected. In
857 such a case, we don't actually need to build a procedure
858 linkage table, and we can just do a PCxx reloc instead. */
859 h
->plt
.offset
= (bfd_vma
) -1;
864 s
= elf_hash_table (info
)->splt
;
865 BFD_ASSERT (s
!= NULL
);
867 /* If this is the first .plt entry, make room for the special
871 s
->size
+= PLT_ENTRY_SIZE
;
874 /* If this symbol is not defined in a regular file, and we are
875 not generating a shared library, then set the symbol to this
876 location in the .plt. This is required to make function
877 pointers compare as equal between the normal executable and
878 the shared library. */
879 if (!bfd_link_pic (info
)
882 h
->root
.u
.def
.section
= s
;
883 h
->root
.u
.def
.value
= s
->size
;
886 h
->plt
.offset
= s
->size
;
888 /* Make room for this entry. */
889 s
->size
+= PLT_ENTRY_SIZE
;
891 /* We also need to make an entry in the .got.plt section, which
892 will be placed in the .got section by the linker script. */
894 s
= elf_hash_table (info
)->sgotplt
;
895 BFD_ASSERT (s
!= NULL
);
898 /* We also need to make an entry in the .rela.plt section. */
900 s
= elf_hash_table (info
)->srelplt
;
901 BFD_ASSERT (s
!= NULL
);
902 s
->size
+= sizeof (Elf32_External_Rela
);
907 /* Reinitialize the plt offset now that it is not used as a reference
909 h
->plt
.offset
= (bfd_vma
) -1;
911 /* If this is a weak symbol, and there is a real definition, the
912 processor independent code will have arranged for us to see the
913 real definition first, and we can just use the same value. */
916 struct elf_link_hash_entry
*def
= weakdef (h
);
917 BFD_ASSERT (def
->root
.type
== bfd_link_hash_defined
);
918 h
->root
.u
.def
.section
= def
->root
.u
.def
.section
;
919 h
->root
.u
.def
.value
= def
->root
.u
.def
.value
;
923 /* This is a reference to a symbol defined by a dynamic object which
924 is not a function. */
926 /* If we are creating a shared library, we must presume that the
927 only references to the symbol are via the global offset table.
928 For such cases we need not do anything here; the relocations will
929 be handled correctly by relocate_section. */
930 if (bfd_link_pic (info
))
933 /* We must allocate the symbol in our .dynbss section, which will
934 become part of the .bss section of the executable. There will be
935 an entry for this symbol in the .dynsym section. The dynamic
936 object will contain position independent code, so all references
937 from the dynamic object to this symbol will go through the global
938 offset table. The dynamic linker will use the .dynsym entry to
939 determine the address it must put in the global offset table, so
940 both the dynamic object and the regular object will refer to the
941 same memory location for the variable. */
943 s
= bfd_get_linker_section (dynobj
, ".dynbss");
944 BFD_ASSERT (s
!= NULL
);
946 /* We must generate a R_VAX_COPY reloc to tell the dynamic linker to
947 copy the initial value out of the dynamic object and into the
948 runtime process image. We need to remember the offset into the
949 .rela.bss section we are going to use. */
950 if ((h
->root
.u
.def
.section
->flags
& SEC_ALLOC
) != 0 && h
->size
!= 0)
954 srel
= bfd_get_linker_section (dynobj
, ".rela.bss");
955 BFD_ASSERT (srel
!= NULL
);
956 srel
->size
+= sizeof (Elf32_External_Rela
);
960 return _bfd_elf_adjust_dynamic_copy (info
, h
, s
);
963 /* This function is called via elf_link_hash_traverse. It resets GOT
964 and PLT (.GOT) reference counts back to -1 so normal PC32 relocation
968 elf_vax_discard_got_entries (struct elf_link_hash_entry
*h
,
969 void *infoptr ATTRIBUTE_UNUSED
)
971 h
->got
.refcount
= -1;
972 h
->plt
.refcount
= -1;
977 /* Discard unused dynamic data if this is a static link. */
980 elf_vax_always_size_sections (bfd
*output_bfd ATTRIBUTE_UNUSED
,
981 struct bfd_link_info
*info
)
986 dynobj
= elf_hash_table (info
)->dynobj
;
988 if (dynobj
&& !elf_hash_table (info
)->dynamic_sections_created
)
990 /* We may have created entries in the .rela.got and .got sections.
991 However, if we are not creating the dynamic sections, we will
992 not actually use these entries. Reset the size of .rela.got
993 and .got, which will cause them to get stripped from the output
995 s
= elf_hash_table (info
)->srelgot
;
998 s
= elf_hash_table (info
)->sgotplt
;
1001 s
= elf_hash_table (info
)->sgot
;
1006 /* If this is a static link, we need to discard all the got entries we've
1008 if (!dynobj
|| !elf_hash_table (info
)->dynamic_sections_created
)
1009 elf_link_hash_traverse (elf_hash_table (info
),
1010 elf_vax_discard_got_entries
,
1016 /* Set the sizes of the dynamic sections. */
1019 elf_vax_size_dynamic_sections (bfd
*output_bfd
, struct bfd_link_info
*info
)
1025 bfd_boolean reltext
;
1027 dynobj
= elf_hash_table (info
)->dynobj
;
1028 BFD_ASSERT (dynobj
!= NULL
);
1030 if (elf_hash_table (info
)->dynamic_sections_created
)
1032 /* Set the contents of the .interp section to the interpreter. */
1033 if (bfd_link_executable (info
) && !info
->nointerp
)
1035 s
= bfd_get_linker_section (dynobj
, ".interp");
1036 BFD_ASSERT (s
!= NULL
);
1037 s
->size
= sizeof ELF_DYNAMIC_INTERPRETER
;
1038 s
->contents
= (unsigned char *) ELF_DYNAMIC_INTERPRETER
;
1042 /* If this is a -Bsymbolic shared link, then we need to discard all PC
1043 relative relocs against symbols defined in a regular object. We
1044 allocated space for them in the check_relocs routine, but we will not
1045 fill them in in the relocate_section routine. */
1046 if (bfd_link_pic (info
) && info
->symbolic
)
1047 elf_vax_link_hash_traverse (elf_hash_table (info
),
1048 elf_vax_discard_copies
,
1051 /* If this is a -Bsymbolic shared link, we need to discard all the got
1052 entries we've recorded. Otherwise, we need to instantiate (allocate
1054 elf_link_hash_traverse (elf_hash_table (info
),
1055 elf_vax_instantiate_got_entries
,
1058 /* The check_relocs and adjust_dynamic_symbol entry points have
1059 determined the sizes of the various dynamic sections. Allocate
1064 for (s
= dynobj
->sections
; s
!= NULL
; s
= s
->next
)
1068 if ((s
->flags
& SEC_LINKER_CREATED
) == 0)
1071 /* It's OK to base decisions on the section name, because none
1072 of the dynobj section names depend upon the input files. */
1073 name
= bfd_get_section_name (dynobj
, s
);
1075 if (strcmp (name
, ".plt") == 0)
1077 /* Remember whether there is a PLT. */
1080 else if (CONST_STRNEQ (name
, ".rela"))
1086 /* Remember whether there are any reloc sections other
1088 if (strcmp (name
, ".rela.plt") != 0)
1090 const char *outname
;
1094 /* If this relocation section applies to a read only
1095 section, then we probably need a DT_TEXTREL
1096 entry. .rela.plt is actually associated with
1097 .got.plt, which is never readonly. */
1098 outname
= bfd_get_section_name (output_bfd
,
1100 target
= bfd_get_section_by_name (output_bfd
, outname
+ 5);
1102 && (target
->flags
& SEC_READONLY
) != 0
1103 && (target
->flags
& SEC_ALLOC
) != 0)
1107 /* We use the reloc_count field as a counter if we need
1108 to copy relocs into the output file. */
1112 else if (! CONST_STRNEQ (name
, ".got")
1113 && strcmp (name
, ".dynbss") != 0)
1115 /* It's not one of our sections, so don't allocate space. */
1121 /* If we don't need this section, strip it from the
1122 output file. This is mostly to handle .rela.bss and
1123 .rela.plt. We must create both sections in
1124 create_dynamic_sections, because they must be created
1125 before the linker maps input sections to output
1126 sections. The linker does that before
1127 adjust_dynamic_symbol is called, and it is that
1128 function which decides whether anything needs to go
1129 into these sections. */
1130 s
->flags
|= SEC_EXCLUDE
;
1134 if ((s
->flags
& SEC_HAS_CONTENTS
) == 0)
1137 /* Allocate memory for the section contents. */
1138 s
->contents
= (bfd_byte
*) bfd_zalloc (dynobj
, s
->size
);
1139 if (s
->contents
== NULL
)
1143 if (elf_hash_table (info
)->dynamic_sections_created
)
1145 /* Add some entries to the .dynamic section. We fill in the
1146 values later, in elf_vax_finish_dynamic_sections, but we
1147 must add the entries now so that we get the correct size for
1148 the .dynamic section. The DT_DEBUG entry is filled in by the
1149 dynamic linker and used by the debugger. */
1150 #define add_dynamic_entry(TAG, VAL) \
1151 _bfd_elf_add_dynamic_entry (info, TAG, VAL)
1153 if (!bfd_link_pic (info
))
1155 if (!add_dynamic_entry (DT_DEBUG
, 0))
1161 if (!add_dynamic_entry (DT_PLTGOT
, 0)
1162 || !add_dynamic_entry (DT_PLTRELSZ
, 0)
1163 || !add_dynamic_entry (DT_PLTREL
, DT_RELA
)
1164 || !add_dynamic_entry (DT_JMPREL
, 0))
1170 if (!add_dynamic_entry (DT_RELA
, 0)
1171 || !add_dynamic_entry (DT_RELASZ
, 0)
1172 || !add_dynamic_entry (DT_RELAENT
, sizeof (Elf32_External_Rela
)))
1176 if (reltext
|| (info
->flags
& DF_TEXTREL
) != 0)
1178 if (!add_dynamic_entry (DT_TEXTREL
, 0))
1182 #undef add_dynamic_entry
1187 /* This function is called via elf_vax_link_hash_traverse if we are
1188 creating a shared object with -Bsymbolic. It discards the space
1189 allocated to copy PC relative relocs against symbols which are defined
1190 in regular objects. We allocated space for them in the check_relocs
1191 routine, but we won't fill them in in the relocate_section routine. */
1194 elf_vax_discard_copies (struct elf_vax_link_hash_entry
*h
,
1195 void * ignore ATTRIBUTE_UNUSED
)
1197 struct elf_vax_pcrel_relocs_copied
*s
;
1199 /* We only discard relocs for symbols defined in a regular object. */
1200 if (!h
->root
.def_regular
)
1203 for (s
= h
->pcrel_relocs_copied
; s
!= NULL
; s
= s
->next
)
1204 s
->section
->size
-= s
->count
* sizeof (Elf32_External_Rela
);
1209 /* This function is called via elf_link_hash_traverse. It looks for
1210 entries that have GOT or PLT (.GOT) references. If creating a shared
1211 object with -Bsymbolic, or the symbol has been forced local, then it
1212 resets the reference count back to -1 so normal PC32 relocation will
1213 be done. Otherwise space in the .got and .rela.got will be reserved
1217 elf_vax_instantiate_got_entries (struct elf_link_hash_entry
*h
, void * infoptr
)
1219 struct bfd_link_info
*info
= (struct bfd_link_info
*) infoptr
;
1224 /* We don't care about non-GOT (and non-PLT) entries. */
1225 if (h
->got
.refcount
<= 0 && h
->plt
.refcount
<= 0)
1228 dynobj
= elf_hash_table (info
)->dynobj
;
1229 BFD_ASSERT (dynobj
!= NULL
);
1231 sgot
= elf_hash_table (info
)->sgot
;
1232 srelgot
= elf_hash_table (info
)->srelgot
;
1234 if (SYMBOL_REFERENCES_LOCAL (info
, h
))
1236 h
->got
.refcount
= -1;
1237 h
->plt
.refcount
= -1;
1239 else if (h
->got
.refcount
> 0)
1241 /* Make sure this symbol is output as a dynamic symbol. */
1242 if (h
->dynindx
== -1)
1244 if (!bfd_elf_link_record_dynamic_symbol (info
, h
))
1248 /* Allocate space in the .got and .rela.got sections. */
1250 srelgot
->size
+= sizeof (Elf32_External_Rela
);
1256 /* Relocate an VAX ELF section. */
1259 elf_vax_relocate_section (bfd
*output_bfd
,
1260 struct bfd_link_info
*info
,
1262 asection
*input_section
,
1264 Elf_Internal_Rela
*relocs
,
1265 Elf_Internal_Sym
*local_syms
,
1266 asection
**local_sections
)
1268 Elf_Internal_Shdr
*symtab_hdr
;
1269 struct elf_link_hash_entry
**sym_hashes
;
1276 Elf_Internal_Rela
*rel
;
1277 Elf_Internal_Rela
*relend
;
1279 symtab_hdr
= &elf_tdata (input_bfd
)->symtab_hdr
;
1280 sym_hashes
= elf_sym_hashes (input_bfd
);
1288 relend
= relocs
+ input_section
->reloc_count
;
1289 for (; rel
< relend
; rel
++)
1292 reloc_howto_type
*howto
;
1293 unsigned long r_symndx
;
1294 struct elf_link_hash_entry
*h
;
1295 Elf_Internal_Sym
*sym
;
1298 bfd_reloc_status_type r
;
1300 r_type
= ELF32_R_TYPE (rel
->r_info
);
1301 if (r_type
< 0 || r_type
>= (int) R_VAX_max
)
1303 bfd_set_error (bfd_error_bad_value
);
1306 howto
= howto_table
+ r_type
;
1308 r_symndx
= ELF32_R_SYM (rel
->r_info
);
1312 if (r_symndx
< symtab_hdr
->sh_info
)
1314 sym
= local_syms
+ r_symndx
;
1315 sec
= local_sections
[r_symndx
];
1316 relocation
= _bfd_elf_rela_local_sym (output_bfd
, sym
, &sec
, rel
);
1320 bfd_boolean unresolved_reloc
;
1321 bfd_boolean warned
, ignored
;
1323 RELOC_FOR_GLOBAL_SYMBOL (info
, input_bfd
, input_section
, rel
,
1324 r_symndx
, symtab_hdr
, sym_hashes
,
1326 unresolved_reloc
, warned
, ignored
);
1328 if ((h
->root
.type
== bfd_link_hash_defined
1329 || h
->root
.type
== bfd_link_hash_defweak
)
1330 && ((r_type
== R_VAX_PLT32
1331 && h
->plt
.offset
!= (bfd_vma
) -1
1333 && elf_hash_table (info
)->dynamic_sections_created
)
1334 || (r_type
== R_VAX_GOT32
1335 && h
->got
.offset
!= (bfd_vma
) -1
1337 && elf_hash_table (info
)->dynamic_sections_created
1338 && (! bfd_link_pic (info
)
1339 || (! info
->symbolic
&& h
->dynindx
!= -1)
1340 || !h
->def_regular
))
1341 || (bfd_link_pic (info
)
1342 && ((! info
->symbolic
&& h
->dynindx
!= -1)
1344 && ((input_section
->flags
& SEC_ALLOC
) != 0
1345 /* DWARF will emit R_VAX_32 relocations in its
1346 sections against symbols defined externally
1347 in shared libraries. We can't do anything
1350 || ((input_section
->flags
& SEC_DEBUGGING
) != 0
1352 && (r_type
== R_VAX_8
1353 || r_type
== R_VAX_16
1354 || r_type
== R_VAX_32
))))
1355 /* In these cases, we don't need the relocation
1356 value. We check specially because in some
1357 obscure cases sec->output_section will be NULL. */
1361 if (sec
!= NULL
&& discarded_section (sec
))
1362 RELOC_AGAINST_DISCARDED_SECTION (info
, input_bfd
, input_section
,
1363 rel
, 1, relend
, howto
, 0, contents
);
1365 if (bfd_link_relocatable (info
))
1371 /* Relocation is to the address of the entry for this symbol
1372 in the global offset table. */
1374 /* Resolve a GOTxx reloc against a local symbol directly,
1375 without using the global offset table. */
1377 || h
->got
.offset
== (bfd_vma
) -1)
1383 sgot
= elf_hash_table (info
)->sgot
;
1384 BFD_ASSERT (sgot
!= NULL
);
1386 off
= h
->got
.offset
;
1387 BFD_ASSERT (off
< sgot
->size
);
1389 bfd_put_32 (output_bfd
, rel
->r_addend
, sgot
->contents
+ off
);
1391 relocation
= sgot
->output_offset
+ off
;
1392 /* The GOT relocation uses the addend. */
1395 /* Change the reference to be indirect. */
1396 contents
[rel
->r_offset
- 1] |= 0x10;
1397 relocation
+= sgot
->output_section
->vma
;
1402 /* If we are creating an executable and the function this
1403 reloc refers to is in a shared lib, then we made a PLT
1404 entry for this symbol and need to handle the reloc like
1406 if (bfd_link_pic (info
))
1407 goto r_vax_pc32_shared
;
1410 /* Relocation is to the entry for this symbol in the
1411 procedure linkage table. */
1413 /* Resolve a PLTxx reloc against a local symbol directly,
1414 without using the procedure linkage table. */
1416 || h
->plt
.offset
== (bfd_vma
) -1)
1419 splt
= elf_hash_table (info
)->splt
;
1420 BFD_ASSERT (splt
!= NULL
);
1422 sgotplt
= elf_hash_table (info
)->sgotplt
;
1423 BFD_ASSERT (sgotplt
!= NULL
);
1425 plt_index
= h
->plt
.offset
/ PLT_ENTRY_SIZE
- 1;
1427 /* Get the offset into the .got table of the entry that
1428 corresponds to this function. Each .got entry is 4 bytes.
1429 The first two are reserved. */
1430 got_offset
= (plt_index
+ 3) * 4;
1432 /* We want the relocation to point into the .got.plt instead
1433 of the plt itself. */
1434 relocation
= (sgotplt
->output_section
->vma
1435 + sgotplt
->output_offset
1437 contents
[rel
->r_offset
-1] |= 0x10; /* make indirect */
1438 if (rel
->r_addend
== 2)
1442 else if (rel
->r_addend
!= 0)
1444 /* xgettext:c-format */
1445 (_("%B: warning: PLT addend of %Ld to `%s'"
1446 " from %A section ignored"),
1447 input_bfd
, rel
->r_addend
, h
->root
.root
.string
, input_section
);
1456 || ELF_ST_VISIBILITY (h
->other
) != STV_DEFAULT
1463 if (bfd_link_pic (info
)
1464 && r_symndx
!= STN_UNDEF
1465 && (input_section
->flags
& SEC_ALLOC
) != 0
1466 && ((r_type
!= R_VAX_PC8
1467 && r_type
!= R_VAX_PC16
1468 && r_type
!= R_VAX_PC32
)
1469 || ((input_section
->flags
& SEC_CODE
)
1471 || (!h
->def_regular
&& h
->type
!= STT_SECTION
)))))
1473 Elf_Internal_Rela outrel
;
1475 bfd_boolean skip
, relocate
;
1477 /* When generating a shared object, these relocations
1478 are copied into the output file to be resolved at run
1482 sreloc
= _bfd_elf_get_dynamic_reloc_section
1483 (input_bfd
, input_section
, /*rela?*/ TRUE
);
1492 _bfd_elf_section_offset (output_bfd
, info
, input_section
,
1494 if (outrel
.r_offset
== (bfd_vma
) -1)
1496 if (outrel
.r_offset
== (bfd_vma
) -2)
1497 skip
= TRUE
, relocate
= TRUE
;
1498 outrel
.r_offset
+= (input_section
->output_section
->vma
1499 + input_section
->output_offset
);
1502 memset (&outrel
, 0, sizeof outrel
);
1503 /* h->dynindx may be -1 if the symbol was marked to
1506 && ((! info
->symbolic
&& h
->dynindx
!= -1)
1507 || !h
->def_regular
))
1509 BFD_ASSERT (h
->dynindx
!= -1);
1510 outrel
.r_info
= ELF32_R_INFO (h
->dynindx
, r_type
);
1511 outrel
.r_addend
= relocation
+ rel
->r_addend
;
1515 if (r_type
== R_VAX_32
)
1518 outrel
.r_info
= ELF32_R_INFO (0, R_VAX_RELATIVE
);
1519 BFD_ASSERT (bfd_get_signed_32 (input_bfd
,
1520 &contents
[rel
->r_offset
]) == 0);
1521 outrel
.r_addend
= relocation
+ rel
->r_addend
;
1527 if (bfd_is_abs_section (sec
))
1529 else if (sec
== NULL
|| sec
->owner
== NULL
)
1531 bfd_set_error (bfd_error_bad_value
);
1538 /* We are turning this relocation into one
1539 against a section symbol. It would be
1540 proper to subtract the symbol's value,
1541 osec->vma, from the emitted reloc addend,
1542 but ld.so expects buggy relocs. */
1543 osec
= sec
->output_section
;
1544 indx
= elf_section_data (osec
)->dynindx
;
1547 struct elf_link_hash_table
*htab
;
1548 htab
= elf_hash_table (info
);
1549 osec
= htab
->text_index_section
;
1550 indx
= elf_section_data (osec
)->dynindx
;
1552 BFD_ASSERT (indx
!= 0);
1555 outrel
.r_info
= ELF32_R_INFO (indx
, r_type
);
1556 outrel
.r_addend
= relocation
+ rel
->r_addend
;
1560 if ((input_section
->flags
& SEC_CODE
) != 0
1561 || (ELF32_R_TYPE (outrel
.r_info
) != R_VAX_32
1562 && ELF32_R_TYPE (outrel
.r_info
) != R_VAX_RELATIVE
1563 && ELF32_R_TYPE (outrel
.r_info
) != R_VAX_COPY
1564 && ELF32_R_TYPE (outrel
.r_info
) != R_VAX_JMP_SLOT
1565 && ELF32_R_TYPE (outrel
.r_info
) != R_VAX_GLOB_DAT
))
1569 /* xgettext:c-format */
1570 (_("%B: warning: %s relocation against symbol `%s'"
1571 " from %A section"),
1572 input_bfd
, howto
->name
, h
->root
.root
.string
,
1576 /* xgettext:c-format */
1577 (_("%B: warning: %s relocation to %#Lx from %A section"),
1578 input_bfd
, howto
->name
, outrel
.r_addend
,
1581 loc
= sreloc
->contents
;
1582 loc
+= sreloc
->reloc_count
++ * sizeof (Elf32_External_Rela
);
1583 bfd_elf32_swap_reloca_out (output_bfd
, &outrel
, loc
);
1585 /* This reloc will be computed at runtime, so there's no
1586 need to do anything now, except for R_VAX_32
1587 relocations that have been turned into
1595 case R_VAX_GNU_VTINHERIT
:
1596 case R_VAX_GNU_VTENTRY
:
1597 /* These are no-ops in the end. */
1604 /* VAX PCREL relocations are from the end of relocation, not the start.
1605 So subtract the difference from the relocation amount since we can't
1606 add it to the offset. */
1607 if (howto
->pc_relative
&& howto
->pcrel_offset
)
1608 relocation
-= bfd_get_reloc_size(howto
);
1610 r
= _bfd_final_link_relocate (howto
, input_bfd
, input_section
,
1611 contents
, rel
->r_offset
,
1612 relocation
, rel
->r_addend
);
1614 if (r
!= bfd_reloc_ok
)
1619 case bfd_reloc_outofrange
:
1621 case bfd_reloc_overflow
:
1629 name
= bfd_elf_string_from_elf_section (input_bfd
,
1630 symtab_hdr
->sh_link
,
1635 name
= bfd_section_name (input_bfd
, sec
);
1637 info
->callbacks
->reloc_overflow
1638 (info
, (h
? &h
->root
: NULL
), name
, howto
->name
,
1639 (bfd_vma
) 0, input_bfd
, input_section
, rel
->r_offset
);
1649 /* Finish up dynamic symbol handling. We set the contents of various
1650 dynamic sections here. */
1653 elf_vax_finish_dynamic_symbol (bfd
*output_bfd
, struct bfd_link_info
*info
,
1654 struct elf_link_hash_entry
*h
,
1655 Elf_Internal_Sym
*sym
)
1659 dynobj
= elf_hash_table (info
)->dynobj
;
1661 if (h
->plt
.offset
!= (bfd_vma
) -1)
1669 Elf_Internal_Rela rela
;
1672 /* This symbol has an entry in the procedure linkage table. Set
1674 BFD_ASSERT (h
->dynindx
!= -1);
1676 splt
= elf_hash_table (info
)->splt
;
1677 sgot
= elf_hash_table (info
)->sgotplt
;
1678 srela
= elf_hash_table (info
)->srelplt
;
1679 BFD_ASSERT (splt
!= NULL
&& sgot
!= NULL
&& srela
!= NULL
);
1681 addend
= 2 * (h
->plt
.offset
& 1);
1682 h
->plt
.offset
&= ~1;
1684 /* Get the index in the procedure linkage table which
1685 corresponds to this symbol. This is the index of this symbol
1686 in all the symbols for which we are making plt entries. The
1687 first entry in the procedure linkage table is reserved. */
1688 plt_index
= h
->plt
.offset
/ PLT_ENTRY_SIZE
- 1;
1690 /* Get the offset into the .got table of the entry that
1691 corresponds to this function. Each .got entry is 4 bytes.
1692 The first two are reserved. */
1693 got_offset
= (plt_index
+ 3) * 4;
1695 /* Fill in the entry in the procedure linkage table. */
1696 memcpy (splt
->contents
+ h
->plt
.offset
, elf_vax_plt_entry
,
1699 /* The offset is relative to the first extension word. */
1700 bfd_put_32 (output_bfd
,
1701 -(h
->plt
.offset
+ 8),
1702 splt
->contents
+ h
->plt
.offset
+ 4);
1704 bfd_put_32 (output_bfd
, plt_index
* sizeof (Elf32_External_Rela
),
1705 splt
->contents
+ h
->plt
.offset
+ 8);
1707 /* Fill in the entry in the global offset table. */
1708 bfd_put_32 (output_bfd
,
1709 (splt
->output_section
->vma
1710 + splt
->output_offset
1711 + h
->plt
.offset
) + addend
,
1712 sgot
->contents
+ got_offset
);
1714 /* Fill in the entry in the .rela.plt section. */
1715 rela
.r_offset
= (sgot
->output_section
->vma
1716 + sgot
->output_offset
1718 rela
.r_info
= ELF32_R_INFO (h
->dynindx
, R_VAX_JMP_SLOT
);
1719 rela
.r_addend
= addend
;
1720 loc
= srela
->contents
+ plt_index
* sizeof (Elf32_External_Rela
);
1721 bfd_elf32_swap_reloca_out (output_bfd
, &rela
, loc
);
1723 if (!h
->def_regular
)
1725 /* Mark the symbol as undefined, rather than as defined in
1726 the .plt section. Leave the value alone. */
1727 sym
->st_shndx
= SHN_UNDEF
;
1731 if (h
->got
.offset
!= (bfd_vma
) -1)
1735 Elf_Internal_Rela rela
;
1738 /* This symbol has an entry in the global offset table. Set it
1740 sgot
= elf_hash_table (info
)->sgot
;
1741 srela
= elf_hash_table (info
)->srelgot
;
1742 BFD_ASSERT (sgot
!= NULL
&& srela
!= NULL
);
1744 rela
.r_offset
= (sgot
->output_section
->vma
1745 + sgot
->output_offset
1747 rela
.r_info
= ELF32_R_INFO (h
->dynindx
, R_VAX_GLOB_DAT
);
1748 rela
.r_addend
= bfd_get_signed_32 (output_bfd
,
1749 sgot
->contents
+ h
->got
.offset
);
1751 loc
= srela
->contents
;
1752 loc
+= srela
->reloc_count
++ * sizeof (Elf32_External_Rela
);
1753 bfd_elf32_swap_reloca_out (output_bfd
, &rela
, loc
);
1759 Elf_Internal_Rela rela
;
1762 /* This symbol needs a copy reloc. Set it up. */
1763 BFD_ASSERT (h
->dynindx
!= -1
1764 && (h
->root
.type
== bfd_link_hash_defined
1765 || h
->root
.type
== bfd_link_hash_defweak
));
1767 s
= bfd_get_linker_section (dynobj
, ".rela.bss");
1768 BFD_ASSERT (s
!= NULL
);
1770 rela
.r_offset
= (h
->root
.u
.def
.value
1771 + h
->root
.u
.def
.section
->output_section
->vma
1772 + h
->root
.u
.def
.section
->output_offset
);
1773 rela
.r_info
= ELF32_R_INFO (h
->dynindx
, R_VAX_COPY
);
1775 loc
= s
->contents
+ s
->reloc_count
++ * sizeof (Elf32_External_Rela
);
1776 bfd_elf32_swap_reloca_out (output_bfd
, &rela
, loc
);
1779 /* Mark _DYNAMIC and _GLOBAL_OFFSET_TABLE_ as absolute. */
1780 if (h
== elf_hash_table (info
)->hdynamic
1781 || h
== elf_hash_table (info
)->hgot
)
1782 sym
->st_shndx
= SHN_ABS
;
1787 /* Finish up the dynamic sections. */
1790 elf_vax_finish_dynamic_sections (bfd
*output_bfd
, struct bfd_link_info
*info
)
1796 dynobj
= elf_hash_table (info
)->dynobj
;
1798 sgot
= elf_hash_table (info
)->sgotplt
;
1799 BFD_ASSERT (sgot
!= NULL
);
1800 sdyn
= bfd_get_linker_section (dynobj
, ".dynamic");
1802 if (elf_hash_table (info
)->dynamic_sections_created
)
1805 Elf32_External_Dyn
*dyncon
, *dynconend
;
1807 splt
= elf_hash_table (info
)->splt
;
1808 BFD_ASSERT (splt
!= NULL
&& sdyn
!= NULL
);
1810 dyncon
= (Elf32_External_Dyn
*) sdyn
->contents
;
1811 dynconend
= (Elf32_External_Dyn
*) (sdyn
->contents
+ sdyn
->size
);
1812 for (; dyncon
< dynconend
; dyncon
++)
1814 Elf_Internal_Dyn dyn
;
1817 bfd_elf32_swap_dyn_in (dynobj
, dyncon
, &dyn
);
1825 s
= elf_hash_table (info
)->sgotplt
;
1828 s
= elf_hash_table (info
)->srelplt
;
1830 dyn
.d_un
.d_ptr
= s
->output_section
->vma
+ s
->output_offset
;
1831 bfd_elf32_swap_dyn_out (output_bfd
, &dyn
, dyncon
);
1835 s
= elf_hash_table (info
)->srelplt
;
1836 dyn
.d_un
.d_val
= s
->size
;
1837 bfd_elf32_swap_dyn_out (output_bfd
, &dyn
, dyncon
);
1842 /* Fill in the first entry in the procedure linkage table. */
1845 memcpy (splt
->contents
, elf_vax_plt0_entry
, PLT_ENTRY_SIZE
);
1846 bfd_put_32 (output_bfd
,
1847 (sgot
->output_section
->vma
1848 + sgot
->output_offset
+ 4
1849 - (splt
->output_section
->vma
+ 6)),
1850 splt
->contents
+ 2);
1851 bfd_put_32 (output_bfd
,
1852 (sgot
->output_section
->vma
1853 + sgot
->output_offset
+ 8
1854 - (splt
->output_section
->vma
+ 12)),
1855 splt
->contents
+ 8);
1856 elf_section_data (splt
->output_section
)->this_hdr
.sh_entsize
1861 /* Fill in the first three entries in the global offset table. */
1865 bfd_put_32 (output_bfd
, (bfd_vma
) 0, sgot
->contents
);
1867 bfd_put_32 (output_bfd
,
1868 sdyn
->output_section
->vma
+ sdyn
->output_offset
,
1870 bfd_put_32 (output_bfd
, (bfd_vma
) 0, sgot
->contents
+ 4);
1871 bfd_put_32 (output_bfd
, (bfd_vma
) 0, sgot
->contents
+ 8);
1874 if (elf_section_data (sgot
->output_section
) != NULL
)
1875 elf_section_data (sgot
->output_section
)->this_hdr
.sh_entsize
= 4;
1880 static enum elf_reloc_type_class
1881 elf_vax_reloc_type_class (const struct bfd_link_info
*info ATTRIBUTE_UNUSED
,
1882 const asection
*rel_sec ATTRIBUTE_UNUSED
,
1883 const Elf_Internal_Rela
*rela
)
1885 switch ((int) ELF32_R_TYPE (rela
->r_info
))
1887 case R_VAX_RELATIVE
:
1888 return reloc_class_relative
;
1889 case R_VAX_JMP_SLOT
:
1890 return reloc_class_plt
;
1892 return reloc_class_copy
;
1894 return reloc_class_normal
;
1899 elf_vax_plt_sym_val (bfd_vma i
, const asection
*plt
,
1900 const arelent
*rel ATTRIBUTE_UNUSED
)
1902 return plt
->vma
+ (i
+ 1) * PLT_ENTRY_SIZE
;
1905 #define TARGET_LITTLE_SYM vax_elf32_vec
1906 #define TARGET_LITTLE_NAME "elf32-vax"
1907 #define ELF_MACHINE_CODE EM_VAX
1908 #define ELF_MAXPAGESIZE 0x1000
1910 #define elf_backend_create_dynamic_sections \
1911 _bfd_elf_create_dynamic_sections
1912 #define bfd_elf32_bfd_link_hash_table_create \
1913 elf_vax_link_hash_table_create
1914 #define bfd_elf32_bfd_final_link bfd_elf_gc_common_final_link
1916 #define elf_backend_check_relocs elf_vax_check_relocs
1917 #define elf_backend_adjust_dynamic_symbol \
1918 elf_vax_adjust_dynamic_symbol
1919 #define elf_backend_always_size_sections \
1920 elf_vax_always_size_sections
1921 #define elf_backend_size_dynamic_sections \
1922 elf_vax_size_dynamic_sections
1923 #define elf_backend_init_index_section _bfd_elf_init_1_index_section
1924 #define elf_backend_relocate_section elf_vax_relocate_section
1925 #define elf_backend_finish_dynamic_symbol \
1926 elf_vax_finish_dynamic_symbol
1927 #define elf_backend_finish_dynamic_sections \
1928 elf_vax_finish_dynamic_sections
1929 #define elf_backend_reloc_type_class elf_vax_reloc_type_class
1930 #define elf_backend_gc_mark_hook elf_vax_gc_mark_hook
1931 #define elf_backend_plt_sym_val elf_vax_plt_sym_val
1932 #define bfd_elf32_bfd_merge_private_bfd_data \
1933 elf32_vax_merge_private_bfd_data
1934 #define bfd_elf32_bfd_set_private_flags \
1935 elf32_vax_set_private_flags
1936 #define bfd_elf32_bfd_print_private_bfd_data \
1937 elf32_vax_print_private_bfd_data
1939 #define elf_backend_can_gc_sections 1
1940 #define elf_backend_want_got_plt 1
1941 #define elf_backend_plt_readonly 1
1942 #define elf_backend_want_plt_sym 0
1943 #define elf_backend_got_header_size 16
1944 #define elf_backend_rela_normal 1
1945 #define elf_backend_dtrel_excludes_plt 1
1947 #include "elf32-target.h"