1 /* VAX series support for 32-bit ELF
2 Copyright 1993, 1995, 1996, 1997, 1998, 1999, 2000, 2001, 2002, 2003,
3 2004, 2005, 2006, 2007, 2008, 2009, 2010, 2011, 2012
4 Free Software Foundation, Inc.
5 Contributed by Matt Thomas <matt@3am-software.com>.
7 This file is part of BFD, the Binary File Descriptor library.
9 This program is free software; you can redistribute it and/or modify
10 it under the terms of the GNU General Public License as published by
11 the Free Software Foundation; either version 3 of the License, or
12 (at your option) any later version.
14 This program is distributed in the hope that it will be useful,
15 but WITHOUT ANY WARRANTY; without even the implied warranty of
16 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
17 GNU General Public License for more details.
19 You should have received a copy of the GNU General Public License
20 along with this program; if not, write to the Free Software
21 Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston,
22 MA 02110-1301, USA. */
31 static reloc_howto_type
*reloc_type_lookup (bfd
*, bfd_reloc_code_real_type
);
32 static void rtype_to_howto (bfd
*, arelent
*, Elf_Internal_Rela
*);
33 static struct bfd_hash_entry
*elf_vax_link_hash_newfunc (struct bfd_hash_entry
*,
34 struct bfd_hash_table
*,
36 static struct bfd_link_hash_table
*elf_vax_link_hash_table_create (bfd
*);
37 static bfd_boolean
elf_vax_check_relocs (bfd
*, struct bfd_link_info
*,
38 asection
*, const Elf_Internal_Rela
*);
39 static bfd_boolean
elf_vax_adjust_dynamic_symbol (struct bfd_link_info
*,
40 struct elf_link_hash_entry
*);
41 static bfd_boolean
elf_vax_size_dynamic_sections (bfd
*, struct bfd_link_info
*);
42 static bfd_boolean
elf_vax_relocate_section (bfd
*, struct bfd_link_info
*,
43 bfd
*, asection
*, bfd_byte
*,
45 Elf_Internal_Sym
*, asection
**);
46 static bfd_boolean
elf_vax_finish_dynamic_symbol (bfd
*, struct bfd_link_info
*,
47 struct elf_link_hash_entry
*,
49 static bfd_boolean
elf_vax_finish_dynamic_sections (bfd
*,
50 struct bfd_link_info
*);
51 static bfd_vma
elf_vax_plt_sym_val (bfd_vma
, const asection
*,
54 static bfd_boolean
elf32_vax_set_private_flags (bfd
*, flagword
);
55 static bfd_boolean
elf32_vax_merge_private_bfd_data (bfd
*, bfd
*);
56 static bfd_boolean
elf32_vax_print_private_bfd_data (bfd
*, PTR
);
58 static reloc_howto_type howto_table
[] = {
59 HOWTO (R_VAX_NONE
, /* type */
61 0, /* size (0 = byte, 1 = short, 2 = long) */
63 FALSE
, /* pc_relative */
65 complain_overflow_dont
, /* complain_on_overflow */
66 bfd_elf_generic_reloc
, /* special_function */
67 "R_VAX_NONE", /* name */
68 FALSE
, /* partial_inplace */
70 0x00000000, /* dst_mask */
71 FALSE
), /* pcrel_offset */
73 HOWTO (R_VAX_32
, /* type */
75 2, /* size (0 = byte, 1 = short, 2 = long) */
77 FALSE
, /* pc_relative */
79 complain_overflow_bitfield
, /* complain_on_overflow */
80 bfd_elf_generic_reloc
, /* special_function */
81 "R_VAX_32", /* name */
82 FALSE
, /* partial_inplace */
84 0xffffffff, /* dst_mask */
85 FALSE
), /* pcrel_offset */
87 HOWTO (R_VAX_16
, /* type */
89 1, /* size (0 = byte, 1 = short, 2 = long) */
91 FALSE
, /* pc_relative */
93 complain_overflow_bitfield
, /* complain_on_overflow */
94 bfd_elf_generic_reloc
, /* special_function */
95 "R_VAX_16", /* name */
96 FALSE
, /* partial_inplace */
98 0x0000ffff, /* dst_mask */
99 FALSE
), /* pcrel_offset */
101 HOWTO (R_VAX_8
, /* type */
103 0, /* size (0 = byte, 1 = short, 2 = long) */
105 FALSE
, /* pc_relative */
107 complain_overflow_bitfield
, /* complain_on_overflow */
108 bfd_elf_generic_reloc
, /* special_function */
109 "R_VAX_8", /* name */
110 FALSE
, /* partial_inplace */
112 0x000000ff, /* dst_mask */
113 FALSE
), /* pcrel_offset */
115 HOWTO (R_VAX_PC32
, /* type */
117 2, /* size (0 = byte, 1 = short, 2 = long) */
119 TRUE
, /* pc_relative */
121 complain_overflow_bitfield
, /* complain_on_overflow */
122 bfd_elf_generic_reloc
, /* special_function */
123 "R_VAX_PC32", /* name */
124 FALSE
, /* partial_inplace */
126 0xffffffff, /* dst_mask */
127 TRUE
), /* pcrel_offset */
129 HOWTO (R_VAX_PC16
, /* type */
131 1, /* size (0 = byte, 1 = short, 2 = long) */
133 TRUE
, /* pc_relative */
135 complain_overflow_signed
, /* complain_on_overflow */
136 bfd_elf_generic_reloc
, /* special_function */
137 "R_VAX_PC16", /* name */
138 FALSE
, /* partial_inplace */
140 0x0000ffff, /* dst_mask */
141 TRUE
), /* pcrel_offset */
143 HOWTO (R_VAX_PC8
, /* type */
145 0, /* size (0 = byte, 1 = short, 2 = long) */
147 TRUE
, /* pc_relative */
149 complain_overflow_signed
, /* complain_on_overflow */
150 bfd_elf_generic_reloc
, /* special_function */
151 "R_VAX_PC8", /* name */
152 FALSE
, /* partial_inplace */
154 0x000000ff, /* dst_mask */
155 TRUE
), /* pcrel_offset */
157 HOWTO (R_VAX_GOT32
, /* type */
159 2, /* size (0 = byte, 1 = short, 2 = long) */
161 TRUE
, /* pc_relative */
163 complain_overflow_bitfield
, /* complain_on_overflow */
164 bfd_elf_generic_reloc
, /* special_function */
165 "R_VAX_GOT32", /* name */
166 FALSE
, /* partial_inplace */
168 0xffffffff, /* dst_mask */
169 TRUE
), /* pcrel_offset */
177 HOWTO (R_VAX_PLT32
, /* type */
179 2, /* size (0 = byte, 1 = short, 2 = long) */
181 TRUE
, /* pc_relative */
183 complain_overflow_bitfield
, /* complain_on_overflow */
184 bfd_elf_generic_reloc
, /* special_function */
185 "R_VAX_PLT32", /* name */
186 FALSE
, /* partial_inplace */
188 0xffffffff, /* dst_mask */
189 TRUE
), /* pcrel_offset */
197 HOWTO (R_VAX_COPY
, /* type */
199 0, /* size (0 = byte, 1 = short, 2 = long) */
201 FALSE
, /* pc_relative */
203 complain_overflow_dont
, /* complain_on_overflow */
204 bfd_elf_generic_reloc
, /* special_function */
205 "R_VAX_COPY", /* name */
206 FALSE
, /* partial_inplace */
208 0xffffffff, /* dst_mask */
209 FALSE
), /* pcrel_offset */
211 HOWTO (R_VAX_GLOB_DAT
, /* type */
213 2, /* size (0 = byte, 1 = short, 2 = long) */
215 FALSE
, /* pc_relative */
217 complain_overflow_dont
, /* complain_on_overflow */
218 bfd_elf_generic_reloc
, /* special_function */
219 "R_VAX_GLOB_DAT", /* name */
220 FALSE
, /* partial_inplace */
222 0xffffffff, /* dst_mask */
223 FALSE
), /* pcrel_offset */
225 HOWTO (R_VAX_JMP_SLOT
, /* type */
227 2, /* size (0 = byte, 1 = short, 2 = long) */
229 FALSE
, /* pc_relative */
231 complain_overflow_dont
, /* complain_on_overflow */
232 bfd_elf_generic_reloc
, /* special_function */
233 "R_VAX_JMP_SLOT", /* name */
234 FALSE
, /* partial_inplace */
236 0xffffffff, /* dst_mask */
237 FALSE
), /* pcrel_offset */
239 HOWTO (R_VAX_RELATIVE
, /* type */
241 2, /* size (0 = byte, 1 = short, 2 = long) */
243 FALSE
, /* pc_relative */
245 complain_overflow_dont
, /* complain_on_overflow */
246 bfd_elf_generic_reloc
, /* special_function */
247 "R_VAX_RELATIVE", /* name */
248 FALSE
, /* partial_inplace */
250 0xffffffff, /* dst_mask */
251 FALSE
), /* pcrel_offset */
253 /* GNU extension to record C++ vtable hierarchy */
254 HOWTO (R_VAX_GNU_VTINHERIT
, /* type */
256 2, /* size (0 = byte, 1 = short, 2 = long) */
258 FALSE
, /* pc_relative */
260 complain_overflow_dont
, /* complain_on_overflow */
261 NULL
, /* special_function */
262 "R_VAX_GNU_VTINHERIT", /* name */
263 FALSE
, /* partial_inplace */
266 FALSE
), /* pcrel_offset */
268 /* GNU extension to record C++ vtable member usage */
269 HOWTO (R_VAX_GNU_VTENTRY
, /* type */
271 2, /* size (0 = byte, 1 = short, 2 = long) */
273 FALSE
, /* pc_relative */
275 complain_overflow_dont
, /* complain_on_overflow */
276 _bfd_elf_rel_vtable_reloc_fn
, /* special_function */
277 "R_VAX_GNU_VTENTRY", /* name */
278 FALSE
, /* partial_inplace */
281 FALSE
), /* pcrel_offset */
285 rtype_to_howto (bfd
*abfd ATTRIBUTE_UNUSED
, arelent
*cache_ptr
,
286 Elf_Internal_Rela
*dst
)
288 BFD_ASSERT (ELF32_R_TYPE(dst
->r_info
) < (unsigned int) R_VAX_max
);
289 cache_ptr
->howto
= &howto_table
[ELF32_R_TYPE(dst
->r_info
)];
292 #define elf_info_to_howto rtype_to_howto
296 bfd_reloc_code_real_type bfd_val
;
299 { BFD_RELOC_NONE
, R_VAX_NONE
},
300 { BFD_RELOC_32
, R_VAX_32
},
301 { BFD_RELOC_16
, R_VAX_16
},
302 { BFD_RELOC_8
, R_VAX_8
},
303 { BFD_RELOC_32_PCREL
, R_VAX_PC32
},
304 { BFD_RELOC_16_PCREL
, R_VAX_PC16
},
305 { BFD_RELOC_8_PCREL
, R_VAX_PC8
},
306 { BFD_RELOC_32_GOT_PCREL
, R_VAX_GOT32
},
307 { BFD_RELOC_32_PLT_PCREL
, R_VAX_PLT32
},
308 { BFD_RELOC_NONE
, R_VAX_COPY
},
309 { BFD_RELOC_VAX_GLOB_DAT
, R_VAX_GLOB_DAT
},
310 { BFD_RELOC_VAX_JMP_SLOT
, R_VAX_JMP_SLOT
},
311 { BFD_RELOC_VAX_RELATIVE
, R_VAX_RELATIVE
},
312 { BFD_RELOC_CTOR
, R_VAX_32
},
313 { BFD_RELOC_VTABLE_INHERIT
, R_VAX_GNU_VTINHERIT
},
314 { BFD_RELOC_VTABLE_ENTRY
, R_VAX_GNU_VTENTRY
},
317 static reloc_howto_type
*
318 reloc_type_lookup (bfd
*abfd ATTRIBUTE_UNUSED
, bfd_reloc_code_real_type code
)
321 for (i
= 0; i
< sizeof (reloc_map
) / sizeof (reloc_map
[0]); i
++)
323 if (reloc_map
[i
].bfd_val
== code
)
324 return &howto_table
[reloc_map
[i
].elf_val
];
329 static reloc_howto_type
*
330 reloc_name_lookup (bfd
*abfd ATTRIBUTE_UNUSED
,
335 for (i
= 0; i
< sizeof (howto_table
) / sizeof (howto_table
[0]); i
++)
336 if (howto_table
[i
].name
!= NULL
337 && strcasecmp (howto_table
[i
].name
, r_name
) == 0)
338 return &howto_table
[i
];
343 #define bfd_elf32_bfd_reloc_type_lookup reloc_type_lookup
344 #define bfd_elf32_bfd_reloc_name_lookup reloc_name_lookup
345 #define ELF_ARCH bfd_arch_vax
346 /* end code generated by elf.el */
348 /* Functions for the VAX ELF linker. */
350 /* The name of the dynamic interpreter. This is put in the .interp
353 #define ELF_DYNAMIC_INTERPRETER "/usr/libexec/ld.elf_so"
355 /* The size in bytes of an entry in the procedure linkage table. */
357 #define PLT_ENTRY_SIZE 12
359 /* The first entry in a procedure linkage table looks like this. See
360 the SVR4 ABI VAX supplement to see how this works. */
362 static const bfd_byte elf_vax_plt0_entry
[PLT_ENTRY_SIZE
] =
364 0xdd, 0xef, /* pushl l^ */
365 0, 0, 0, 0, /* offset to .plt.got + 4 */
366 0x17, 0xff, /* jmp @L^(pc) */
367 0, 0, 0, 0, /* offset to .plt.got + 8 */
370 /* Subsequent entries in a procedure linkage table look like this. */
372 static const bfd_byte elf_vax_plt_entry
[PLT_ENTRY_SIZE
] =
374 0xfc, 0x0f, /* .word ^M<r11:r2> */
375 0x16, 0xef, /* jsb L^(pc) */
376 0, 0, 0, 0, /* replaced with offset to start of .plt */
377 0, 0, 0, 0, /* index into .rela.plt */
380 /* The VAX linker needs to keep track of the number of relocs that it
381 decides to copy in check_relocs for each symbol. This is so that it
382 can discard PC relative relocs if it doesn't need them when linking
383 with -Bsymbolic. We store the information in a field extending the
384 regular ELF linker hash table. */
386 /* This structure keeps track of the number of PC relative relocs we have
387 copied for a given symbol. */
389 struct elf_vax_pcrel_relocs_copied
392 struct elf_vax_pcrel_relocs_copied
*next
;
393 /* A section in dynobj. */
395 /* Number of relocs copied in this section. */
399 /* VAX ELF linker hash entry. */
401 struct elf_vax_link_hash_entry
403 struct elf_link_hash_entry root
;
405 /* Number of PC relative relocs copied for this symbol. */
406 struct elf_vax_pcrel_relocs_copied
*pcrel_relocs_copied
;
411 /* Declare this now that the above structures are defined. */
413 static bfd_boolean
elf_vax_discard_copies (struct elf_vax_link_hash_entry
*,
416 /* Declare this now that the above structures are defined. */
418 static bfd_boolean
elf_vax_instantiate_got_entries (struct elf_link_hash_entry
*,
421 /* Traverse an VAX ELF linker hash table. */
423 #define elf_vax_link_hash_traverse(table, func, info) \
424 (elf_link_hash_traverse \
426 (bfd_boolean (*) (struct elf_link_hash_entry *, PTR)) (func), \
429 /* Create an entry in an VAX ELF linker hash table. */
431 static struct bfd_hash_entry
*
432 elf_vax_link_hash_newfunc (struct bfd_hash_entry
*entry
,
433 struct bfd_hash_table
*table
,
436 struct elf_vax_link_hash_entry
*ret
=
437 (struct elf_vax_link_hash_entry
*) entry
;
439 /* Allocate the structure if it has not already been allocated by a
442 ret
= ((struct elf_vax_link_hash_entry
*)
443 bfd_hash_allocate (table
,
444 sizeof (struct elf_vax_link_hash_entry
)));
446 return (struct bfd_hash_entry
*) ret
;
448 /* Call the allocation method of the superclass. */
449 ret
= ((struct elf_vax_link_hash_entry
*)
450 _bfd_elf_link_hash_newfunc ((struct bfd_hash_entry
*) ret
,
454 ret
->pcrel_relocs_copied
= NULL
;
457 return (struct bfd_hash_entry
*) ret
;
460 /* Create an VAX ELF linker hash table. */
462 static struct bfd_link_hash_table
*
463 elf_vax_link_hash_table_create (bfd
*abfd
)
465 struct elf_link_hash_table
*ret
;
466 bfd_size_type amt
= sizeof (struct elf_link_hash_table
);
468 ret
= bfd_malloc (amt
);
472 if (!_bfd_elf_link_hash_table_init (ret
, abfd
,
473 elf_vax_link_hash_newfunc
,
474 sizeof (struct elf_vax_link_hash_entry
),
484 /* Keep vax-specific flags in the ELF header */
486 elf32_vax_set_private_flags (bfd
*abfd
, flagword flags
)
488 elf_elfheader (abfd
)->e_flags
= flags
;
489 elf_flags_init (abfd
) = TRUE
;
493 /* Merge backend specific data from an object file to the output
494 object file when linking. */
496 elf32_vax_merge_private_bfd_data (bfd
*ibfd
, bfd
*obfd
)
500 if ( bfd_get_flavour (ibfd
) != bfd_target_elf_flavour
501 || bfd_get_flavour (obfd
) != bfd_target_elf_flavour
)
504 in_flags
= elf_elfheader (ibfd
)->e_flags
;
506 if (!elf_flags_init (obfd
))
508 elf_flags_init (obfd
) = TRUE
;
509 elf_elfheader (obfd
)->e_flags
= in_flags
;
515 /* Display the flags field */
517 elf32_vax_print_private_bfd_data (bfd
*abfd
, PTR ptr
)
519 FILE *file
= (FILE *) ptr
;
521 BFD_ASSERT (abfd
!= NULL
&& ptr
!= NULL
);
523 /* Print normal ELF private data. */
524 _bfd_elf_print_private_bfd_data (abfd
, ptr
);
526 /* Ignore init flag - it may not be set, despite the flags field containing valid data. */
528 /* xgettext:c-format */
529 fprintf (file
, _("private flags = %lx:"), elf_elfheader (abfd
)->e_flags
);
531 if (elf_elfheader (abfd
)->e_flags
& EF_VAX_NONPIC
)
532 fprintf (file
, _(" [nonpic]"));
534 if (elf_elfheader (abfd
)->e_flags
& EF_VAX_DFLOAT
)
535 fprintf (file
, _(" [d-float]"));
537 if (elf_elfheader (abfd
)->e_flags
& EF_VAX_GFLOAT
)
538 fprintf (file
, _(" [g-float]"));
544 /* Look through the relocs for a section during the first phase, and
545 allocate space in the global offset table or procedure linkage
549 elf_vax_check_relocs (bfd
*abfd
, struct bfd_link_info
*info
, asection
*sec
,
550 const Elf_Internal_Rela
*relocs
)
553 Elf_Internal_Shdr
*symtab_hdr
;
554 struct elf_link_hash_entry
**sym_hashes
;
555 const Elf_Internal_Rela
*rel
;
556 const Elf_Internal_Rela
*rel_end
;
561 if (info
->relocatable
)
564 dynobj
= elf_hash_table (info
)->dynobj
;
565 symtab_hdr
= &elf_tdata (abfd
)->symtab_hdr
;
566 sym_hashes
= elf_sym_hashes (abfd
);
572 rel_end
= relocs
+ sec
->reloc_count
;
573 for (rel
= relocs
; rel
< rel_end
; rel
++)
575 unsigned long r_symndx
;
576 struct elf_link_hash_entry
*h
;
578 r_symndx
= ELF32_R_SYM (rel
->r_info
);
580 if (r_symndx
< symtab_hdr
->sh_info
)
584 h
= sym_hashes
[r_symndx
- symtab_hdr
->sh_info
];
585 while (h
->root
.type
== bfd_link_hash_indirect
586 || h
->root
.type
== bfd_link_hash_warning
)
587 h
= (struct elf_link_hash_entry
*) h
->root
.u
.i
.link
;
590 switch (ELF32_R_TYPE (rel
->r_info
))
593 BFD_ASSERT (h
!= NULL
);
595 || h
== elf_hash_table (info
)->hgot
596 || h
== elf_hash_table (info
)->hplt
)
599 /* If this is a local symbol, we resolve it directly without
600 creating a global offset table entry. */
601 if (h
== NULL
|| ELF_ST_VISIBILITY (h
->other
) != STV_DEFAULT
)
604 /* This symbol requires a global offset table entry. */
608 /* Create the .got section. */
609 elf_hash_table (info
)->dynobj
= dynobj
= abfd
;
610 if (!_bfd_elf_create_got_section (dynobj
, info
))
616 sgot
= bfd_get_linker_section (dynobj
, ".got");
617 BFD_ASSERT (sgot
!= NULL
);
621 && (h
!= NULL
|| info
->shared
))
623 srelgot
= bfd_get_linker_section (dynobj
, ".rela.got");
626 flagword flags
= (SEC_ALLOC
| SEC_LOAD
| SEC_HAS_CONTENTS
627 | SEC_IN_MEMORY
| SEC_LINKER_CREATED
630 srelgot
= bfd_make_section_anyway_with_flags (dynobj
,
634 || !bfd_set_section_alignment (dynobj
, srelgot
, 2))
641 struct elf_vax_link_hash_entry
*eh
;
643 eh
= (struct elf_vax_link_hash_entry
*) h
;
644 if (h
->got
.refcount
== -1)
647 eh
->got_addend
= rel
->r_addend
;
652 if (eh
->got_addend
!= (bfd_vma
) rel
->r_addend
)
653 (*_bfd_error_handler
)
654 (_("%s: warning: GOT addend of %ld to `%s' does"
655 " not match previous GOT addend of %ld"),
656 bfd_get_filename (abfd
), rel
->r_addend
,
665 /* This symbol requires a procedure linkage table entry. We
666 actually build the entry in adjust_dynamic_symbol,
667 because this might be a case of linking PIC code which is
668 never referenced by a dynamic object, in which case we
669 don't need to generate a procedure linkage table entry
672 /* If this is a local symbol, we resolve it directly without
673 creating a procedure linkage table entry. */
674 BFD_ASSERT (h
!= NULL
);
675 if (ELF_ST_VISIBILITY (h
->other
) != STV_DEFAULT
|| h
->forced_local
)
679 if (h
->plt
.refcount
== -1)
688 /* If we are creating a shared library and this is not a local
689 symbol, we need to copy the reloc into the shared library.
690 However when linking with -Bsymbolic and this is a global
691 symbol which is defined in an object we are including in the
692 link (i.e., DEF_REGULAR is set), then we can resolve the
693 reloc directly. At this point we have not seen all the input
694 files, so it is possible that DEF_REGULAR is not set now but
695 will be set later (it is never cleared). We account for that
696 possibility below by storing information in the
697 pcrel_relocs_copied field of the hash table entry. */
699 && (sec
->flags
& SEC_ALLOC
) != 0
702 || !h
->def_regular
)))
705 && ELF_ST_VISIBILITY (h
->other
) == STV_DEFAULT
708 /* Make sure a plt entry is created for this symbol if
709 it turns out to be a function defined by a dynamic
711 if (h
->plt
.refcount
== -1)
718 /* If this is a local symbol, we can resolve it directly. */
720 && (ELF_ST_VISIBILITY (h
->other
) != STV_DEFAULT
728 if (h
!= NULL
&& ELF_ST_VISIBILITY (h
->other
) == STV_DEFAULT
)
730 /* Make sure a plt entry is created for this symbol if it
731 turns out to be a function defined by a dynamic object. */
732 if (h
->plt
.refcount
== -1)
738 /* If we are creating a shared library, we need to copy the
739 reloc into the shared library. */
741 && (sec
->flags
& SEC_ALLOC
) != 0)
743 /* When creating a shared object, we must copy these
744 reloc types into the output file. We create a reloc
745 section in dynobj and make room for this reloc. */
748 sreloc
= _bfd_elf_make_dynamic_reloc_section
749 (sec
, dynobj
, 2, abfd
, /*rela?*/ TRUE
);
754 if (sec
->flags
& SEC_READONLY
)
755 info
->flags
|= DF_TEXTREL
;
758 sreloc
->size
+= sizeof (Elf32_External_Rela
);
760 /* If we are linking with -Bsymbolic, we count the number of
761 PC relative relocations we have entered for this symbol,
762 so that we can discard them again if the symbol is later
763 defined by a regular object. Note that this function is
764 only called if we are using a vaxelf linker hash table,
765 which means that h is really a pointer to an
766 elf_vax_link_hash_entry. */
767 if ((ELF32_R_TYPE (rel
->r_info
) == R_VAX_PC8
768 || ELF32_R_TYPE (rel
->r_info
) == R_VAX_PC16
769 || ELF32_R_TYPE (rel
->r_info
) == R_VAX_PC32
)
772 struct elf_vax_link_hash_entry
*eh
;
773 struct elf_vax_pcrel_relocs_copied
*p
;
775 eh
= (struct elf_vax_link_hash_entry
*) h
;
777 for (p
= eh
->pcrel_relocs_copied
; p
!= NULL
; p
= p
->next
)
778 if (p
->section
== sreloc
)
783 p
= ((struct elf_vax_pcrel_relocs_copied
*)
784 bfd_alloc (dynobj
, (bfd_size_type
) sizeof *p
));
787 p
->next
= eh
->pcrel_relocs_copied
;
788 eh
->pcrel_relocs_copied
= p
;
799 /* This relocation describes the C++ object vtable hierarchy.
800 Reconstruct it for later use during GC. */
801 case R_VAX_GNU_VTINHERIT
:
802 if (!bfd_elf_gc_record_vtinherit (abfd
, sec
, h
, rel
->r_offset
))
806 /* This relocation describes which C++ vtable entries are actually
807 used. Record for later use during GC. */
808 case R_VAX_GNU_VTENTRY
:
809 BFD_ASSERT (h
!= NULL
);
811 && !bfd_elf_gc_record_vtentry (abfd
, sec
, h
, rel
->r_addend
))
823 /* Return the section that should be marked against GC for a given
827 elf_vax_gc_mark_hook (asection
*sec
,
828 struct bfd_link_info
*info
,
829 Elf_Internal_Rela
*rel
,
830 struct elf_link_hash_entry
*h
,
831 Elf_Internal_Sym
*sym
)
834 switch (ELF32_R_TYPE (rel
->r_info
))
836 case R_VAX_GNU_VTINHERIT
:
837 case R_VAX_GNU_VTENTRY
:
841 return _bfd_elf_gc_mark_hook (sec
, info
, rel
, h
, sym
);
844 /* Update the got entry reference counts for the section being removed. */
847 elf_vax_gc_sweep_hook (bfd
*abfd
, struct bfd_link_info
*info
, asection
*sec
,
848 const Elf_Internal_Rela
*relocs
)
850 Elf_Internal_Shdr
*symtab_hdr
;
851 struct elf_link_hash_entry
**sym_hashes
;
852 const Elf_Internal_Rela
*rel
, *relend
;
855 if (info
->relocatable
)
858 dynobj
= elf_hash_table (info
)->dynobj
;
862 symtab_hdr
= &elf_tdata (abfd
)->symtab_hdr
;
863 sym_hashes
= elf_sym_hashes (abfd
);
865 relend
= relocs
+ sec
->reloc_count
;
866 for (rel
= relocs
; rel
< relend
; rel
++)
868 unsigned long r_symndx
;
869 struct elf_link_hash_entry
*h
= NULL
;
871 r_symndx
= ELF32_R_SYM (rel
->r_info
);
872 if (r_symndx
>= symtab_hdr
->sh_info
)
874 h
= sym_hashes
[r_symndx
- symtab_hdr
->sh_info
];
875 while (h
->root
.type
== bfd_link_hash_indirect
876 || h
->root
.type
== bfd_link_hash_warning
)
877 h
= (struct elf_link_hash_entry
*) h
->root
.u
.i
.link
;
880 switch (ELF32_R_TYPE (rel
->r_info
))
883 if (h
!= NULL
&& h
->got
.refcount
> 0)
894 if (h
!= NULL
&& h
->plt
.refcount
> 0)
906 /* Adjust a symbol defined by a dynamic object and referenced by a
907 regular object. The current definition is in some section of the
908 dynamic object, but we're not including those sections. We have to
909 change the definition to something the rest of the link can
913 elf_vax_adjust_dynamic_symbol (info
, h
)
914 struct bfd_link_info
*info
;
915 struct elf_link_hash_entry
*h
;
920 dynobj
= elf_hash_table (info
)->dynobj
;
922 /* Make sure we know what is going on here. */
923 BFD_ASSERT (dynobj
!= NULL
925 || h
->u
.weakdef
!= NULL
928 && !h
->def_regular
)));
930 /* If this is a function, put it in the procedure linkage table. We
931 will fill in the contents of the procedure linkage table later,
932 when we know the address of the .got section. */
933 if (h
->type
== STT_FUNC
939 /* We must always create the plt entry if it was referenced
940 by a PLTxxO relocation. In this case we already recorded
941 it as a dynamic symbol. */
944 /* This case can occur if we saw a PLTxx reloc in an input
945 file, but the symbol was never referred to by a dynamic
946 object. In such a case, we don't actually need to build
947 a procedure linkage table, and we can just do a PCxx
949 BFD_ASSERT (h
->needs_plt
);
950 h
->plt
.offset
= (bfd_vma
) -1;
954 /* GC may have rendered this entry unused. */
955 if (h
->plt
.refcount
<= 0)
958 h
->plt
.offset
= (bfd_vma
) -1;
962 /* Make sure this symbol is output as a dynamic symbol. */
963 if (h
->dynindx
== -1)
965 if (! bfd_elf_link_record_dynamic_symbol (info
, h
))
969 s
= bfd_get_linker_section (dynobj
, ".plt");
970 BFD_ASSERT (s
!= NULL
);
972 /* If this is the first .plt entry, make room for the special
976 s
->size
+= PLT_ENTRY_SIZE
;
979 /* If this symbol is not defined in a regular file, and we are
980 not generating a shared library, then set the symbol to this
981 location in the .plt. This is required to make function
982 pointers compare as equal between the normal executable and
983 the shared library. */
987 h
->root
.u
.def
.section
= s
;
988 h
->root
.u
.def
.value
= s
->size
;
991 h
->plt
.offset
= s
->size
;
993 /* Make room for this entry. */
994 s
->size
+= PLT_ENTRY_SIZE
;
996 /* We also need to make an entry in the .got.plt section, which
997 will be placed in the .got section by the linker script. */
999 s
= bfd_get_linker_section (dynobj
, ".got.plt");
1000 BFD_ASSERT (s
!= NULL
);
1003 /* We also need to make an entry in the .rela.plt section. */
1005 s
= bfd_get_linker_section (dynobj
, ".rela.plt");
1006 BFD_ASSERT (s
!= NULL
);
1007 s
->size
+= sizeof (Elf32_External_Rela
);
1012 /* Reinitialize the plt offset now that it is not used as a reference
1014 h
->plt
.offset
= (bfd_vma
) -1;
1016 /* If this is a weak symbol, and there is a real definition, the
1017 processor independent code will have arranged for us to see the
1018 real definition first, and we can just use the same value. */
1019 if (h
->u
.weakdef
!= NULL
)
1021 BFD_ASSERT (h
->u
.weakdef
->root
.type
== bfd_link_hash_defined
1022 || h
->u
.weakdef
->root
.type
== bfd_link_hash_defweak
);
1023 h
->root
.u
.def
.section
= h
->u
.weakdef
->root
.u
.def
.section
;
1024 h
->root
.u
.def
.value
= h
->u
.weakdef
->root
.u
.def
.value
;
1028 /* This is a reference to a symbol defined by a dynamic object which
1029 is not a function. */
1031 /* If we are creating a shared library, we must presume that the
1032 only references to the symbol are via the global offset table.
1033 For such cases we need not do anything here; the relocations will
1034 be handled correctly by relocate_section. */
1038 /* We must allocate the symbol in our .dynbss section, which will
1039 become part of the .bss section of the executable. There will be
1040 an entry for this symbol in the .dynsym section. The dynamic
1041 object will contain position independent code, so all references
1042 from the dynamic object to this symbol will go through the global
1043 offset table. The dynamic linker will use the .dynsym entry to
1044 determine the address it must put in the global offset table, so
1045 both the dynamic object and the regular object will refer to the
1046 same memory location for the variable. */
1048 s
= bfd_get_linker_section (dynobj
, ".dynbss");
1049 BFD_ASSERT (s
!= NULL
);
1051 /* We must generate a R_VAX_COPY reloc to tell the dynamic linker to
1052 copy the initial value out of the dynamic object and into the
1053 runtime process image. We need to remember the offset into the
1054 .rela.bss section we are going to use. */
1055 if ((h
->root
.u
.def
.section
->flags
& SEC_ALLOC
) != 0 && h
->size
!= 0)
1059 srel
= bfd_get_linker_section (dynobj
, ".rela.bss");
1060 BFD_ASSERT (srel
!= NULL
);
1061 srel
->size
+= sizeof (Elf32_External_Rela
);
1065 return _bfd_elf_adjust_dynamic_copy (h
, s
);
1068 /* Set the sizes of the dynamic sections. */
1071 elf_vax_size_dynamic_sections (bfd
*output_bfd
, struct bfd_link_info
*info
)
1077 bfd_boolean reltext
;
1079 dynobj
= elf_hash_table (info
)->dynobj
;
1080 BFD_ASSERT (dynobj
!= NULL
);
1082 if (elf_hash_table (info
)->dynamic_sections_created
)
1084 /* Set the contents of the .interp section to the interpreter. */
1085 if (info
->executable
)
1087 s
= bfd_get_linker_section (dynobj
, ".interp");
1088 BFD_ASSERT (s
!= NULL
);
1089 s
->size
= sizeof ELF_DYNAMIC_INTERPRETER
;
1090 s
->contents
= (unsigned char *) ELF_DYNAMIC_INTERPRETER
;
1095 /* We may have created entries in the .rela.got and .got sections.
1096 However, if we are not creating the dynamic sections, we will
1097 not actually use these entries. Reset the size of .rela.got
1098 and .got, which will cause it to get stripped from the output
1100 s
= bfd_get_linker_section (dynobj
, ".rela.got");
1103 s
= bfd_get_linker_section (dynobj
, ".got.plt");
1106 s
= bfd_get_linker_section (dynobj
, ".got");
1111 /* If this is a -Bsymbolic shared link, then we need to discard all PC
1112 relative relocs against symbols defined in a regular object. We
1113 allocated space for them in the check_relocs routine, but we will not
1114 fill them in in the relocate_section routine. */
1115 if (info
->shared
&& info
->symbolic
)
1116 elf_vax_link_hash_traverse (elf_hash_table (info
),
1117 elf_vax_discard_copies
,
1120 /* If this is a -Bsymbolic shared link or a static link, we need to
1121 discard all the got entries we've recorded. Otherwise, we need to
1122 instantiate (allocate space for them). */
1123 elf_link_hash_traverse (elf_hash_table (info
),
1124 elf_vax_instantiate_got_entries
,
1127 /* The check_relocs and adjust_dynamic_symbol entry points have
1128 determined the sizes of the various dynamic sections. Allocate
1133 for (s
= dynobj
->sections
; s
!= NULL
; s
= s
->next
)
1137 if ((s
->flags
& SEC_LINKER_CREATED
) == 0)
1140 /* It's OK to base decisions on the section name, because none
1141 of the dynobj section names depend upon the input files. */
1142 name
= bfd_get_section_name (dynobj
, s
);
1144 if (strcmp (name
, ".plt") == 0)
1146 /* Remember whether there is a PLT. */
1149 else if (CONST_STRNEQ (name
, ".rela"))
1155 /* Remember whether there are any reloc sections other
1157 if (strcmp (name
, ".rela.plt") != 0)
1159 const char *outname
;
1163 /* If this relocation section applies to a read only
1164 section, then we probably need a DT_TEXTREL
1165 entry. .rela.plt is actually associated with
1166 .got.plt, which is never readonly. */
1167 outname
= bfd_get_section_name (output_bfd
,
1169 target
= bfd_get_section_by_name (output_bfd
, outname
+ 5);
1171 && (target
->flags
& SEC_READONLY
) != 0
1172 && (target
->flags
& SEC_ALLOC
) != 0)
1176 /* We use the reloc_count field as a counter if we need
1177 to copy relocs into the output file. */
1181 else if (! CONST_STRNEQ (name
, ".got")
1182 && strcmp (name
, ".dynbss") != 0)
1184 /* It's not one of our sections, so don't allocate space. */
1190 /* If we don't need this section, strip it from the
1191 output file. This is mostly to handle .rela.bss and
1192 .rela.plt. We must create both sections in
1193 create_dynamic_sections, because they must be created
1194 before the linker maps input sections to output
1195 sections. The linker does that before
1196 adjust_dynamic_symbol is called, and it is that
1197 function which decides whether anything needs to go
1198 into these sections. */
1199 s
->flags
|= SEC_EXCLUDE
;
1203 if ((s
->flags
& SEC_HAS_CONTENTS
) == 0)
1206 /* Allocate memory for the section contents. */
1207 s
->contents
= (bfd_byte
*) bfd_alloc (dynobj
, s
->size
);
1208 if (s
->contents
== NULL
)
1212 if (elf_hash_table (info
)->dynamic_sections_created
)
1214 /* Add some entries to the .dynamic section. We fill in the
1215 values later, in elf_vax_finish_dynamic_sections, but we
1216 must add the entries now so that we get the correct size for
1217 the .dynamic section. The DT_DEBUG entry is filled in by the
1218 dynamic linker and used by the debugger. */
1219 #define add_dynamic_entry(TAG, VAL) \
1220 _bfd_elf_add_dynamic_entry (info, TAG, VAL)
1224 if (!add_dynamic_entry (DT_DEBUG
, 0))
1230 if (!add_dynamic_entry (DT_PLTGOT
, 0)
1231 || !add_dynamic_entry (DT_PLTRELSZ
, 0)
1232 || !add_dynamic_entry (DT_PLTREL
, DT_RELA
)
1233 || !add_dynamic_entry (DT_JMPREL
, 0))
1239 if (!add_dynamic_entry (DT_RELA
, 0)
1240 || !add_dynamic_entry (DT_RELASZ
, 0)
1241 || !add_dynamic_entry (DT_RELAENT
, sizeof (Elf32_External_Rela
)))
1245 if (reltext
|| (info
->flags
& DF_TEXTREL
) != 0)
1247 if (!add_dynamic_entry (DT_TEXTREL
, 0))
1251 #undef add_dynamic_entry
1256 /* This function is called via elf_vax_link_hash_traverse if we are
1257 creating a shared object with -Bsymbolic. It discards the space
1258 allocated to copy PC relative relocs against symbols which are defined
1259 in regular objects. We allocated space for them in the check_relocs
1260 routine, but we won't fill them in in the relocate_section routine. */
1263 elf_vax_discard_copies (struct elf_vax_link_hash_entry
*h
,
1264 PTR ignore ATTRIBUTE_UNUSED
)
1266 struct elf_vax_pcrel_relocs_copied
*s
;
1268 /* We only discard relocs for symbols defined in a regular object. */
1269 if (!h
->root
.def_regular
)
1272 for (s
= h
->pcrel_relocs_copied
; s
!= NULL
; s
= s
->next
)
1273 s
->section
->size
-= s
->count
* sizeof (Elf32_External_Rela
);
1278 /* This function is called via elf_link_hash_traverse. It looks for entries
1279 that have GOT or PLT (.GOT) references. If creating a static object or a
1280 shared object with -Bsymbolic, it resets the reference count back to 0
1281 and sets the offset to -1 so normal PC32 relocation will be done. If
1282 creating a shared object or executable, space in the .got and .rela.got
1283 will be reserved for the symbol. */
1286 elf_vax_instantiate_got_entries (struct elf_link_hash_entry
*h
, PTR infoptr
)
1288 struct bfd_link_info
*info
= (struct bfd_link_info
*) infoptr
;
1293 /* We don't care about non-GOT (and non-PLT) entries. */
1294 if (h
->got
.refcount
<= 0 && h
->plt
.refcount
<= 0)
1297 dynobj
= elf_hash_table (info
)->dynobj
;
1301 sgot
= bfd_get_linker_section (dynobj
, ".got");
1302 srelgot
= bfd_get_linker_section (dynobj
, ".rela.got");
1304 if (!elf_hash_table (info
)->dynamic_sections_created
1305 || (info
->shared
&& info
->symbolic
)
1308 h
->got
.refcount
= 0;
1309 h
->got
.offset
= (bfd_vma
) -1;
1310 h
->plt
.refcount
= 0;
1311 h
->plt
.offset
= (bfd_vma
) -1;
1313 else if (h
->got
.refcount
> 0)
1317 /* Make sure this symbol is output as a dynamic symbol. */
1318 if (h
->dynindx
== -1)
1320 if (!bfd_elf_link_record_dynamic_symbol (info
, h
))
1324 dyn
= elf_hash_table (info
)->dynamic_sections_created
;
1325 /* Allocate space in the .got and .rela.got sections. */
1326 if (ELF_ST_VISIBILITY (h
->other
) == STV_DEFAULT
1328 || WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn
, 0, h
)))
1331 srelgot
->size
+= sizeof (Elf32_External_Rela
);
1338 /* Relocate an VAX ELF section. */
1341 elf_vax_relocate_section (bfd
*output_bfd
,
1342 struct bfd_link_info
*info
,
1344 asection
*input_section
,
1346 Elf_Internal_Rela
*relocs
,
1347 Elf_Internal_Sym
*local_syms
,
1348 asection
**local_sections
)
1351 Elf_Internal_Shdr
*symtab_hdr
;
1352 struct elf_link_hash_entry
**sym_hashes
;
1359 Elf_Internal_Rela
*rel
;
1360 Elf_Internal_Rela
*relend
;
1362 dynobj
= elf_hash_table (info
)->dynobj
;
1363 symtab_hdr
= &elf_tdata (input_bfd
)->symtab_hdr
;
1364 sym_hashes
= elf_sym_hashes (input_bfd
);
1372 relend
= relocs
+ input_section
->reloc_count
;
1373 for (; rel
< relend
; rel
++)
1376 reloc_howto_type
*howto
;
1377 unsigned long r_symndx
;
1378 struct elf_link_hash_entry
*h
;
1379 Elf_Internal_Sym
*sym
;
1382 bfd_reloc_status_type r
;
1384 r_type
= ELF32_R_TYPE (rel
->r_info
);
1385 if (r_type
< 0 || r_type
>= (int) R_VAX_max
)
1387 bfd_set_error (bfd_error_bad_value
);
1390 howto
= howto_table
+ r_type
;
1392 r_symndx
= ELF32_R_SYM (rel
->r_info
);
1396 if (r_symndx
< symtab_hdr
->sh_info
)
1398 sym
= local_syms
+ r_symndx
;
1399 sec
= local_sections
[r_symndx
];
1400 relocation
= _bfd_elf_rela_local_sym (output_bfd
, sym
, &sec
, rel
);
1404 bfd_boolean unresolved_reloc
;
1407 RELOC_FOR_GLOBAL_SYMBOL (info
, input_bfd
, input_section
, rel
,
1408 r_symndx
, symtab_hdr
, sym_hashes
,
1410 unresolved_reloc
, warned
);
1412 if ((h
->root
.type
== bfd_link_hash_defined
1413 || h
->root
.type
== bfd_link_hash_defweak
)
1414 && ((r_type
== R_VAX_PLT32
1415 && h
->plt
.offset
!= (bfd_vma
) -1
1417 && elf_hash_table (info
)->dynamic_sections_created
)
1418 || (r_type
== R_VAX_GOT32
1419 && h
->got
.offset
!= (bfd_vma
) -1
1421 && elf_hash_table (info
)->dynamic_sections_created
1423 || (! info
->symbolic
&& h
->dynindx
!= -1)
1424 || !h
->def_regular
))
1426 && ((! info
->symbolic
&& h
->dynindx
!= -1)
1428 && ((input_section
->flags
& SEC_ALLOC
) != 0
1429 /* DWARF will emit R_VAX_32 relocations in its
1430 sections against symbols defined externally
1431 in shared libraries. We can't do anything
1434 || ((input_section
->flags
& SEC_DEBUGGING
) != 0
1436 && (r_type
== R_VAX_8
1437 || r_type
== R_VAX_16
1438 || r_type
== R_VAX_32
))))
1439 /* In these cases, we don't need the relocation
1440 value. We check specially because in some
1441 obscure cases sec->output_section will be NULL. */
1445 if (sec
!= NULL
&& discarded_section (sec
))
1446 RELOC_AGAINST_DISCARDED_SECTION (info
, input_bfd
, input_section
,
1447 rel
, 1, relend
, howto
, 0, contents
);
1449 if (info
->relocatable
)
1455 /* Relocation is to the address of the entry for this symbol
1456 in the global offset table. */
1458 || ELF_ST_VISIBILITY (h
->other
) != STV_DEFAULT
1459 || h
->got
.offset
== (bfd_vma
) -1
1463 /* Relocation is the offset of the entry for this symbol in
1464 the global offset table. */
1472 sgot
= bfd_get_linker_section (dynobj
, ".got");
1473 BFD_ASSERT (sgot
!= NULL
);
1476 BFD_ASSERT (h
!= NULL
);
1477 off
= h
->got
.offset
;
1478 BFD_ASSERT (off
!= (bfd_vma
) -1);
1479 BFD_ASSERT (off
< sgot
->size
);
1481 dyn
= elf_hash_table (info
)->dynamic_sections_created
;
1482 if (! WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn
, info
->shared
, h
)
1484 && SYMBOL_REFERENCES_LOCAL (info
, h
)))
1486 /* The symbol was forced to be local
1487 because of a version file.. We must initialize
1488 this entry in the global offset table. Since
1489 the offset must always be a multiple of 4, we
1490 use the least significant bit to record whether
1491 we have initialized it already.
1493 When doing a dynamic link, we create a .rela.got
1494 relocation entry to initialize the value. This
1495 is done in the finish_dynamic_symbol routine. */
1500 bfd_put_32 (output_bfd
, relocation
+ rel
->r_addend
,
1501 sgot
->contents
+ off
);
1505 bfd_put_32 (output_bfd
, rel
->r_addend
, sgot
->contents
+ off
);
1508 relocation
= sgot
->output_offset
+ off
;
1509 /* The GOT relocation uses the addend. */
1512 /* Change the reference to be indirect. */
1513 contents
[rel
->r_offset
- 1] |= 0x10;
1514 relocation
+= sgot
->output_section
->vma
;
1519 /* If we are creating an executable and the function this
1520 reloc refers to is in a shared lib, then we made a PLT
1521 entry for this symbol and need to handle the reloc like
1524 goto r_vax_pc32_shared
;
1527 /* Relocation is to the entry for this symbol in the
1528 procedure linkage table. */
1530 /* Resolve a PLTxx reloc against a local symbol directly,
1531 without using the procedure linkage table. */
1533 || ELF_ST_VISIBILITY (h
->other
) != STV_DEFAULT
1537 if (h
->plt
.offset
== (bfd_vma
) -1
1538 || !elf_hash_table (info
)->dynamic_sections_created
)
1540 /* We didn't make a PLT entry for this symbol. This
1541 happens when statically linking PIC code, or when
1542 using -Bsymbolic. */
1548 splt
= bfd_get_linker_section (dynobj
, ".plt");
1549 BFD_ASSERT (splt
!= NULL
);
1552 if (sgotplt
== NULL
)
1554 sgotplt
= bfd_get_linker_section (dynobj
, ".got.plt");
1555 BFD_ASSERT (sgotplt
!= NULL
);
1558 plt_index
= h
->plt
.offset
/ PLT_ENTRY_SIZE
- 1;
1560 /* Get the offset into the .got table of the entry that
1561 corresponds to this function. Each .got entry is 4 bytes.
1562 The first two are reserved. */
1563 got_offset
= (plt_index
+ 3) * 4;
1565 /* We want the relocation to point into the .got.plt instead
1566 of the plt itself. */
1567 relocation
= (sgotplt
->output_section
->vma
1568 + sgotplt
->output_offset
1570 contents
[rel
->r_offset
-1] |= 0x10; /* make indirect */
1571 if (rel
->r_addend
== 2)
1575 else if (rel
->r_addend
!= 0)
1576 (*_bfd_error_handler
)
1577 (_("%s: warning: PLT addend of %d to `%s' from %s section ignored"),
1578 bfd_get_filename (input_bfd
), rel
->r_addend
,
1579 h
->root
.root
.string
,
1580 bfd_get_section_name (input_bfd
, input_section
));
1589 || ELF_ST_VISIBILITY (h
->other
) != STV_DEFAULT
1597 && r_symndx
!= STN_UNDEF
1598 && (input_section
->flags
& SEC_ALLOC
) != 0
1599 && ((r_type
!= R_VAX_PC8
1600 && r_type
!= R_VAX_PC16
1601 && r_type
!= R_VAX_PC32
)
1602 || ((input_section
->flags
& SEC_CODE
)
1604 || (!h
->def_regular
&& h
->type
!= STT_SECTION
)))))
1606 Elf_Internal_Rela outrel
;
1608 bfd_boolean skip
, relocate
;
1610 /* When generating a shared object, these relocations
1611 are copied into the output file to be resolved at run
1615 sreloc
= _bfd_elf_get_dynamic_reloc_section
1616 (input_bfd
, input_section
, /*rela?*/ TRUE
);
1625 _bfd_elf_section_offset (output_bfd
, info
, input_section
,
1627 if (outrel
.r_offset
== (bfd_vma
) -1)
1629 if (outrel
.r_offset
== (bfd_vma
) -2)
1630 skip
= TRUE
, relocate
= TRUE
;
1631 outrel
.r_offset
+= (input_section
->output_section
->vma
1632 + input_section
->output_offset
);
1635 memset (&outrel
, 0, sizeof outrel
);
1636 /* h->dynindx may be -1 if the symbol was marked to
1639 && ((! info
->symbolic
&& h
->dynindx
!= -1)
1640 || !h
->def_regular
))
1642 BFD_ASSERT (h
->dynindx
!= -1);
1643 outrel
.r_info
= ELF32_R_INFO (h
->dynindx
, r_type
);
1644 outrel
.r_addend
= relocation
+ rel
->r_addend
;
1648 if (r_type
== R_VAX_32
)
1651 outrel
.r_info
= ELF32_R_INFO (0, R_VAX_RELATIVE
);
1652 BFD_ASSERT (bfd_get_signed_32 (input_bfd
,
1653 &contents
[rel
->r_offset
]) == 0);
1654 outrel
.r_addend
= relocation
+ rel
->r_addend
;
1660 if (bfd_is_abs_section (sec
))
1662 else if (sec
== NULL
|| sec
->owner
== NULL
)
1664 bfd_set_error (bfd_error_bad_value
);
1671 /* We are turning this relocation into one
1672 against a section symbol. It would be
1673 proper to subtract the symbol's value,
1674 osec->vma, from the emitted reloc addend,
1675 but ld.so expects buggy relocs. */
1676 osec
= sec
->output_section
;
1677 indx
= elf_section_data (osec
)->dynindx
;
1680 struct elf_link_hash_table
*htab
;
1681 htab
= elf_hash_table (info
);
1682 osec
= htab
->text_index_section
;
1683 indx
= elf_section_data (osec
)->dynindx
;
1685 BFD_ASSERT (indx
!= 0);
1688 outrel
.r_info
= ELF32_R_INFO (indx
, r_type
);
1689 outrel
.r_addend
= relocation
+ rel
->r_addend
;
1693 if ((input_section
->flags
& SEC_CODE
) != 0
1694 || (ELF32_R_TYPE (outrel
.r_info
) != R_VAX_32
1695 && ELF32_R_TYPE (outrel
.r_info
) != R_VAX_RELATIVE
1696 && ELF32_R_TYPE (outrel
.r_info
) != R_VAX_COPY
1697 && ELF32_R_TYPE (outrel
.r_info
) != R_VAX_JMP_SLOT
1698 && ELF32_R_TYPE (outrel
.r_info
) != R_VAX_GLOB_DAT
))
1701 (*_bfd_error_handler
)
1702 (_("%s: warning: %s relocation against symbol `%s' from %s section"),
1703 bfd_get_filename (input_bfd
), howto
->name
,
1704 h
->root
.root
.string
,
1705 bfd_get_section_name (input_bfd
, input_section
));
1707 (*_bfd_error_handler
)
1708 (_("%s: warning: %s relocation to 0x%x from %s section"),
1709 bfd_get_filename (input_bfd
), howto
->name
,
1711 bfd_get_section_name (input_bfd
, input_section
));
1713 loc
= sreloc
->contents
;
1714 loc
+= sreloc
->reloc_count
++ * sizeof (Elf32_External_Rela
);
1715 bfd_elf32_swap_reloca_out (output_bfd
, &outrel
, loc
);
1717 /* This reloc will be computed at runtime, so there's no
1718 need to do anything now, except for R_VAX_32
1719 relocations that have been turned into
1727 case R_VAX_GNU_VTINHERIT
:
1728 case R_VAX_GNU_VTENTRY
:
1729 /* These are no-ops in the end. */
1736 /* VAX PCREL relocations are from the end of relocation, not the start.
1737 So subtract the difference from the relocation amount since we can't
1738 add it to the offset. */
1739 if (howto
->pc_relative
&& howto
->pcrel_offset
)
1740 relocation
-= bfd_get_reloc_size(howto
);
1742 r
= _bfd_final_link_relocate (howto
, input_bfd
, input_section
,
1743 contents
, rel
->r_offset
,
1744 relocation
, rel
->r_addend
);
1746 if (r
!= bfd_reloc_ok
)
1751 case bfd_reloc_outofrange
:
1753 case bfd_reloc_overflow
:
1761 name
= bfd_elf_string_from_elf_section (input_bfd
,
1762 symtab_hdr
->sh_link
,
1767 name
= bfd_section_name (input_bfd
, sec
);
1769 if (!(info
->callbacks
->reloc_overflow
1770 (info
, (h
? &h
->root
: NULL
), name
, howto
->name
,
1771 (bfd_vma
) 0, input_bfd
, input_section
,
1783 /* Finish up dynamic symbol handling. We set the contents of various
1784 dynamic sections here. */
1787 elf_vax_finish_dynamic_symbol (bfd
*output_bfd
, struct bfd_link_info
*info
,
1788 struct elf_link_hash_entry
*h
,
1789 Elf_Internal_Sym
*sym
)
1793 dynobj
= elf_hash_table (info
)->dynobj
;
1795 if (h
->plt
.offset
!= (bfd_vma
) -1)
1803 Elf_Internal_Rela rela
;
1806 /* This symbol has an entry in the procedure linkage table. Set
1808 BFD_ASSERT (h
->dynindx
!= -1);
1810 splt
= bfd_get_linker_section (dynobj
, ".plt");
1811 sgot
= bfd_get_linker_section (dynobj
, ".got.plt");
1812 srela
= bfd_get_linker_section (dynobj
, ".rela.plt");
1813 BFD_ASSERT (splt
!= NULL
&& sgot
!= NULL
&& srela
!= NULL
);
1815 addend
= 2 * (h
->plt
.offset
& 1);
1816 h
->plt
.offset
&= ~1;
1818 /* Get the index in the procedure linkage table which
1819 corresponds to this symbol. This is the index of this symbol
1820 in all the symbols for which we are making plt entries. The
1821 first entry in the procedure linkage table is reserved. */
1822 plt_index
= h
->plt
.offset
/ PLT_ENTRY_SIZE
- 1;
1824 /* Get the offset into the .got table of the entry that
1825 corresponds to this function. Each .got entry is 4 bytes.
1826 The first two are reserved. */
1827 got_offset
= (plt_index
+ 3) * 4;
1829 /* Fill in the entry in the procedure linkage table. */
1830 memcpy (splt
->contents
+ h
->plt
.offset
, elf_vax_plt_entry
,
1833 /* The offset is relative to the first extension word. */
1834 bfd_put_32 (output_bfd
,
1835 -(h
->plt
.offset
+ 8),
1836 splt
->contents
+ h
->plt
.offset
+ 4);
1838 bfd_put_32 (output_bfd
, plt_index
* sizeof (Elf32_External_Rela
),
1839 splt
->contents
+ h
->plt
.offset
+ 8);
1841 /* Fill in the entry in the global offset table. */
1842 bfd_put_32 (output_bfd
,
1843 (splt
->output_section
->vma
1844 + splt
->output_offset
1845 + h
->plt
.offset
) + addend
,
1846 sgot
->contents
+ got_offset
);
1848 /* Fill in the entry in the .rela.plt section. */
1849 rela
.r_offset
= (sgot
->output_section
->vma
1850 + sgot
->output_offset
1852 rela
.r_info
= ELF32_R_INFO (h
->dynindx
, R_VAX_JMP_SLOT
);
1853 rela
.r_addend
= addend
;
1854 loc
= srela
->contents
+ plt_index
* sizeof (Elf32_External_Rela
);
1855 bfd_elf32_swap_reloca_out (output_bfd
, &rela
, loc
);
1857 if (!h
->def_regular
)
1859 /* Mark the symbol as undefined, rather than as defined in
1860 the .plt section. Leave the value alone. */
1861 sym
->st_shndx
= SHN_UNDEF
;
1865 if (h
->got
.offset
!= (bfd_vma
) -1)
1869 Elf_Internal_Rela rela
;
1872 /* This symbol has an entry in the global offset table. Set it
1874 sgot
= bfd_get_linker_section (dynobj
, ".got");
1875 srela
= bfd_get_linker_section (dynobj
, ".rela.got");
1876 BFD_ASSERT (sgot
!= NULL
&& srela
!= NULL
);
1878 rela
.r_offset
= (sgot
->output_section
->vma
1879 + sgot
->output_offset
1880 + (h
->got
.offset
&~ 1));
1882 /* If the symbol was forced to be local because of a version file
1883 locally we just want to emit a RELATIVE reloc. The entry in
1884 the global offset table will already have been initialized in
1885 the relocate_section function. */
1890 rela
.r_info
= ELF32_R_INFO (0, R_VAX_RELATIVE
);
1894 rela
.r_info
= ELF32_R_INFO (h
->dynindx
, R_VAX_GLOB_DAT
);
1896 rela
.r_addend
= bfd_get_signed_32 (output_bfd
,
1898 + (h
->got
.offset
& ~1)));
1900 loc
= srela
->contents
;
1901 loc
+= srela
->reloc_count
++ * sizeof (Elf32_External_Rela
);
1902 bfd_elf32_swap_reloca_out (output_bfd
, &rela
, loc
);
1908 Elf_Internal_Rela rela
;
1911 /* This symbol needs a copy reloc. Set it up. */
1912 BFD_ASSERT (h
->dynindx
!= -1
1913 && (h
->root
.type
== bfd_link_hash_defined
1914 || h
->root
.type
== bfd_link_hash_defweak
));
1916 s
= bfd_get_linker_section (dynobj
, ".rela.bss");
1917 BFD_ASSERT (s
!= NULL
);
1919 rela
.r_offset
= (h
->root
.u
.def
.value
1920 + h
->root
.u
.def
.section
->output_section
->vma
1921 + h
->root
.u
.def
.section
->output_offset
);
1922 rela
.r_info
= ELF32_R_INFO (h
->dynindx
, R_VAX_COPY
);
1924 loc
= s
->contents
+ s
->reloc_count
++ * sizeof (Elf32_External_Rela
);
1925 bfd_elf32_swap_reloca_out (output_bfd
, &rela
, loc
);
1928 /* Mark _DYNAMIC and _GLOBAL_OFFSET_TABLE_ as absolute. */
1929 if (strcmp (h
->root
.root
.string
, "_DYNAMIC") == 0
1930 || h
== elf_hash_table (info
)->hgot
)
1931 sym
->st_shndx
= SHN_ABS
;
1936 /* Finish up the dynamic sections. */
1939 elf_vax_finish_dynamic_sections (bfd
*output_bfd
, struct bfd_link_info
*info
)
1945 dynobj
= elf_hash_table (info
)->dynobj
;
1947 sgot
= bfd_get_linker_section (dynobj
, ".got.plt");
1948 BFD_ASSERT (sgot
!= NULL
);
1949 sdyn
= bfd_get_linker_section (dynobj
, ".dynamic");
1951 if (elf_hash_table (info
)->dynamic_sections_created
)
1954 Elf32_External_Dyn
*dyncon
, *dynconend
;
1956 splt
= bfd_get_linker_section (dynobj
, ".plt");
1957 BFD_ASSERT (splt
!= NULL
&& sdyn
!= NULL
);
1959 dyncon
= (Elf32_External_Dyn
*) sdyn
->contents
;
1960 dynconend
= (Elf32_External_Dyn
*) (sdyn
->contents
+ sdyn
->size
);
1961 for (; dyncon
< dynconend
; dyncon
++)
1963 Elf_Internal_Dyn dyn
;
1967 bfd_elf32_swap_dyn_in (dynobj
, dyncon
, &dyn
);
1980 s
= bfd_get_section_by_name (output_bfd
, name
);
1981 BFD_ASSERT (s
!= NULL
);
1982 dyn
.d_un
.d_ptr
= s
->vma
;
1983 bfd_elf32_swap_dyn_out (output_bfd
, &dyn
, dyncon
);
1987 s
= bfd_get_section_by_name (output_bfd
, ".rela.plt");
1988 BFD_ASSERT (s
!= NULL
);
1989 dyn
.d_un
.d_val
= s
->size
;
1990 bfd_elf32_swap_dyn_out (output_bfd
, &dyn
, dyncon
);
1994 /* The procedure linkage table relocs (DT_JMPREL) should
1995 not be included in the overall relocs (DT_RELA).
1996 Therefore, we override the DT_RELASZ entry here to
1997 make it not include the JMPREL relocs. Since the
1998 linker script arranges for .rela.plt to follow all
1999 other relocation sections, we don't have to worry
2000 about changing the DT_RELA entry. */
2001 s
= bfd_get_section_by_name (output_bfd
, ".rela.plt");
2003 dyn
.d_un
.d_val
-= s
->size
;
2004 bfd_elf32_swap_dyn_out (output_bfd
, &dyn
, dyncon
);
2009 /* Fill in the first entry in the procedure linkage table. */
2012 memcpy (splt
->contents
, elf_vax_plt0_entry
, PLT_ENTRY_SIZE
);
2013 bfd_put_32 (output_bfd
,
2014 (sgot
->output_section
->vma
2015 + sgot
->output_offset
+ 4
2016 - (splt
->output_section
->vma
+ 6)),
2017 splt
->contents
+ 2);
2018 bfd_put_32 (output_bfd
,
2019 (sgot
->output_section
->vma
2020 + sgot
->output_offset
+ 8
2021 - (splt
->output_section
->vma
+ 12)),
2022 splt
->contents
+ 8);
2023 elf_section_data (splt
->output_section
)->this_hdr
.sh_entsize
2028 /* Fill in the first three entries in the global offset table. */
2032 bfd_put_32 (output_bfd
, (bfd_vma
) 0, sgot
->contents
);
2034 bfd_put_32 (output_bfd
,
2035 sdyn
->output_section
->vma
+ sdyn
->output_offset
,
2037 bfd_put_32 (output_bfd
, (bfd_vma
) 0, sgot
->contents
+ 4);
2038 bfd_put_32 (output_bfd
, (bfd_vma
) 0, sgot
->contents
+ 8);
2041 elf_section_data (sgot
->output_section
)->this_hdr
.sh_entsize
= 4;
2046 static enum elf_reloc_type_class
2047 elf_vax_reloc_type_class (const Elf_Internal_Rela
*rela
)
2049 switch ((int) ELF32_R_TYPE (rela
->r_info
))
2051 case R_VAX_RELATIVE
:
2052 return reloc_class_relative
;
2053 case R_VAX_JMP_SLOT
:
2054 return reloc_class_plt
;
2056 return reloc_class_copy
;
2058 return reloc_class_normal
;
2063 elf_vax_plt_sym_val (bfd_vma i
, const asection
*plt
,
2064 const arelent
*rel ATTRIBUTE_UNUSED
)
2066 return plt
->vma
+ (i
+ 1) * PLT_ENTRY_SIZE
;
2069 #define TARGET_LITTLE_SYM bfd_elf32_vax_vec
2070 #define TARGET_LITTLE_NAME "elf32-vax"
2071 #define ELF_MACHINE_CODE EM_VAX
2072 #define ELF_MAXPAGESIZE 0x1000
2074 #define elf_backend_create_dynamic_sections \
2075 _bfd_elf_create_dynamic_sections
2076 #define bfd_elf32_bfd_link_hash_table_create \
2077 elf_vax_link_hash_table_create
2078 #define bfd_elf32_bfd_final_link bfd_elf_gc_common_final_link
2080 #define elf_backend_check_relocs elf_vax_check_relocs
2081 #define elf_backend_adjust_dynamic_symbol \
2082 elf_vax_adjust_dynamic_symbol
2083 #define elf_backend_size_dynamic_sections \
2084 elf_vax_size_dynamic_sections
2085 #define elf_backend_init_index_section _bfd_elf_init_1_index_section
2086 #define elf_backend_relocate_section elf_vax_relocate_section
2087 #define elf_backend_finish_dynamic_symbol \
2088 elf_vax_finish_dynamic_symbol
2089 #define elf_backend_finish_dynamic_sections \
2090 elf_vax_finish_dynamic_sections
2091 #define elf_backend_reloc_type_class elf_vax_reloc_type_class
2092 #define elf_backend_gc_mark_hook elf_vax_gc_mark_hook
2093 #define elf_backend_gc_sweep_hook elf_vax_gc_sweep_hook
2094 #define elf_backend_plt_sym_val elf_vax_plt_sym_val
2095 #define bfd_elf32_bfd_merge_private_bfd_data \
2096 elf32_vax_merge_private_bfd_data
2097 #define bfd_elf32_bfd_set_private_flags \
2098 elf32_vax_set_private_flags
2099 #define bfd_elf32_bfd_print_private_bfd_data \
2100 elf32_vax_print_private_bfd_data
2102 #define elf_backend_can_gc_sections 1
2103 #define elf_backend_want_got_plt 1
2104 #define elf_backend_plt_readonly 1
2105 #define elf_backend_want_plt_sym 0
2106 #define elf_backend_got_header_size 16
2107 #define elf_backend_rela_normal 1
2109 #include "elf32-target.h"