1 /* Intel 80386/80486-specific support for 32-bit ELF
2 Copyright 1993, 1994, 1995, 1996, 1997, 1998, 1999, 2000, 2001
3 Free Software Foundation, Inc.
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 2 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., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */
27 static reloc_howto_type
*elf_i386_reloc_type_lookup
28 PARAMS ((bfd
*, bfd_reloc_code_real_type
));
29 static void elf_i386_info_to_howto
30 PARAMS ((bfd
*, arelent
*, Elf32_Internal_Rela
*));
31 static void elf_i386_info_to_howto_rel
32 PARAMS ((bfd
*, arelent
*, Elf32_Internal_Rel
*));
33 static boolean elf_i386_is_local_label_name
34 PARAMS ((bfd
*, const char *));
35 static boolean elf_i386_grok_prstatus
36 PARAMS ((bfd
*abfd
, Elf_Internal_Note
*note
));
37 static boolean elf_i386_grok_psinfo
38 PARAMS ((bfd
*abfd
, Elf_Internal_Note
*note
));
39 static struct bfd_hash_entry
*link_hash_newfunc
40 PARAMS ((struct bfd_hash_entry
*, struct bfd_hash_table
*, const char *));
41 static struct bfd_link_hash_table
*elf_i386_link_hash_table_create
43 static boolean create_got_section
44 PARAMS((bfd
*, struct bfd_link_info
*));
45 static boolean elf_i386_create_dynamic_sections
46 PARAMS((bfd
*, struct bfd_link_info
*));
47 static void elf_i386_copy_indirect_symbol
48 PARAMS ((struct elf_link_hash_entry
*, struct elf_link_hash_entry
*));
49 static boolean elf_i386_check_relocs
50 PARAMS ((bfd
*, struct bfd_link_info
*, asection
*,
51 const Elf_Internal_Rela
*));
52 static asection
*elf_i386_gc_mark_hook
53 PARAMS ((bfd
*, struct bfd_link_info
*, Elf_Internal_Rela
*,
54 struct elf_link_hash_entry
*, Elf_Internal_Sym
*));
55 static boolean elf_i386_gc_sweep_hook
56 PARAMS ((bfd
*, struct bfd_link_info
*, asection
*,
57 const Elf_Internal_Rela
*));
58 static boolean elf_i386_adjust_dynamic_symbol
59 PARAMS ((struct bfd_link_info
*, struct elf_link_hash_entry
*));
60 static boolean allocate_dynrelocs
61 PARAMS ((struct elf_link_hash_entry
*, PTR
));
62 static boolean readonly_dynrelocs
63 PARAMS ((struct elf_link_hash_entry
*, PTR
));
64 static boolean elf_i386_fake_sections
65 PARAMS ((bfd
*, Elf32_Internal_Shdr
*, asection
*));
66 static boolean elf_i386_size_dynamic_sections
67 PARAMS ((bfd
*, struct bfd_link_info
*));
68 static boolean elf_i386_relocate_section
69 PARAMS ((bfd
*, struct bfd_link_info
*, bfd
*, asection
*, bfd_byte
*,
70 Elf_Internal_Rela
*, Elf_Internal_Sym
*, asection
**));
71 static boolean elf_i386_finish_dynamic_symbol
72 PARAMS ((bfd
*, struct bfd_link_info
*, struct elf_link_hash_entry
*,
74 static enum elf_reloc_type_class elf_i386_reloc_type_class
75 PARAMS ((const Elf_Internal_Rela
*));
76 static boolean elf_i386_finish_dynamic_sections
77 PARAMS ((bfd
*, struct bfd_link_info
*));
79 #define USE_REL 1 /* 386 uses REL relocations instead of RELA */
83 static reloc_howto_type elf_howto_table
[]=
85 HOWTO(R_386_NONE
, 0, 0, 0, false, 0, complain_overflow_bitfield
,
86 bfd_elf_generic_reloc
, "R_386_NONE",
87 true, 0x00000000, 0x00000000, false),
88 HOWTO(R_386_32
, 0, 2, 32, false, 0, complain_overflow_bitfield
,
89 bfd_elf_generic_reloc
, "R_386_32",
90 true, 0xffffffff, 0xffffffff, false),
91 HOWTO(R_386_PC32
, 0, 2, 32, true, 0, complain_overflow_bitfield
,
92 bfd_elf_generic_reloc
, "R_386_PC32",
93 true, 0xffffffff, 0xffffffff, true),
94 HOWTO(R_386_GOT32
, 0, 2, 32, false, 0, complain_overflow_bitfield
,
95 bfd_elf_generic_reloc
, "R_386_GOT32",
96 true, 0xffffffff, 0xffffffff, false),
97 HOWTO(R_386_PLT32
, 0, 2, 32, true, 0, complain_overflow_bitfield
,
98 bfd_elf_generic_reloc
, "R_386_PLT32",
99 true, 0xffffffff, 0xffffffff, true),
100 HOWTO(R_386_COPY
, 0, 2, 32, false, 0, complain_overflow_bitfield
,
101 bfd_elf_generic_reloc
, "R_386_COPY",
102 true, 0xffffffff, 0xffffffff, false),
103 HOWTO(R_386_GLOB_DAT
, 0, 2, 32, false, 0, complain_overflow_bitfield
,
104 bfd_elf_generic_reloc
, "R_386_GLOB_DAT",
105 true, 0xffffffff, 0xffffffff, false),
106 HOWTO(R_386_JUMP_SLOT
, 0, 2, 32, false, 0, complain_overflow_bitfield
,
107 bfd_elf_generic_reloc
, "R_386_JUMP_SLOT",
108 true, 0xffffffff, 0xffffffff, false),
109 HOWTO(R_386_RELATIVE
, 0, 2, 32, false, 0, complain_overflow_bitfield
,
110 bfd_elf_generic_reloc
, "R_386_RELATIVE",
111 true, 0xffffffff, 0xffffffff, false),
112 HOWTO(R_386_GOTOFF
, 0, 2, 32, false, 0, complain_overflow_bitfield
,
113 bfd_elf_generic_reloc
, "R_386_GOTOFF",
114 true, 0xffffffff, 0xffffffff, false),
115 HOWTO(R_386_GOTPC
, 0, 2, 32, true, 0, complain_overflow_bitfield
,
116 bfd_elf_generic_reloc
, "R_386_GOTPC",
117 true, 0xffffffff, 0xffffffff, true),
119 /* We have a gap in the reloc numbers here.
120 R_386_standard counts the number up to this point, and
121 R_386_ext_offset is the value to subtract from a reloc type of
122 R_386_16 thru R_386_PC8 to form an index into this table. */
123 #define R_386_standard ((unsigned int) R_386_GOTPC + 1)
124 #define R_386_ext_offset ((unsigned int) R_386_16 - R_386_standard)
126 /* The remaining relocs are a GNU extension. */
127 HOWTO(R_386_16
, 0, 1, 16, false, 0, complain_overflow_bitfield
,
128 bfd_elf_generic_reloc
, "R_386_16",
129 true, 0xffff, 0xffff, false),
130 HOWTO(R_386_PC16
, 0, 1, 16, true, 0, complain_overflow_bitfield
,
131 bfd_elf_generic_reloc
, "R_386_PC16",
132 true, 0xffff, 0xffff, true),
133 HOWTO(R_386_8
, 0, 0, 8, false, 0, complain_overflow_bitfield
,
134 bfd_elf_generic_reloc
, "R_386_8",
135 true, 0xff, 0xff, false),
136 HOWTO(R_386_PC8
, 0, 0, 8, true, 0, complain_overflow_signed
,
137 bfd_elf_generic_reloc
, "R_386_PC8",
138 true, 0xff, 0xff, true),
141 #define R_386_ext ((unsigned int) R_386_PC8 + 1 - R_386_ext_offset)
142 #define R_386_vt_offset ((unsigned int) R_386_GNU_VTINHERIT - R_386_ext)
144 /* GNU extension to record C++ vtable hierarchy. */
145 HOWTO (R_386_GNU_VTINHERIT
, /* type */
147 2, /* size (0 = byte, 1 = short, 2 = long) */
149 false, /* pc_relative */
151 complain_overflow_dont
, /* complain_on_overflow */
152 NULL
, /* special_function */
153 "R_386_GNU_VTINHERIT", /* name */
154 false, /* partial_inplace */
159 /* GNU extension to record C++ vtable member usage. */
160 HOWTO (R_386_GNU_VTENTRY
, /* type */
162 2, /* size (0 = byte, 1 = short, 2 = long) */
164 false, /* pc_relative */
166 complain_overflow_dont
, /* complain_on_overflow */
167 _bfd_elf_rel_vtable_reloc_fn
, /* special_function */
168 "R_386_GNU_VTENTRY", /* name */
169 false, /* partial_inplace */
174 #define R_386_vt ((unsigned int) R_386_GNU_VTENTRY + 1 - R_386_vt_offset)
178 #ifdef DEBUG_GEN_RELOC
179 #define TRACE(str) fprintf (stderr, "i386 bfd reloc lookup %d (%s)\n", code, str)
184 static reloc_howto_type
*
185 elf_i386_reloc_type_lookup (abfd
, code
)
186 bfd
*abfd ATTRIBUTE_UNUSED
;
187 bfd_reloc_code_real_type code
;
192 TRACE ("BFD_RELOC_NONE");
193 return &elf_howto_table
[(unsigned int) R_386_NONE
];
196 TRACE ("BFD_RELOC_32");
197 return &elf_howto_table
[(unsigned int) R_386_32
];
200 TRACE ("BFD_RELOC_CTOR");
201 return &elf_howto_table
[(unsigned int) R_386_32
];
203 case BFD_RELOC_32_PCREL
:
204 TRACE ("BFD_RELOC_PC32");
205 return &elf_howto_table
[(unsigned int) R_386_PC32
];
207 case BFD_RELOC_386_GOT32
:
208 TRACE ("BFD_RELOC_386_GOT32");
209 return &elf_howto_table
[(unsigned int) R_386_GOT32
];
211 case BFD_RELOC_386_PLT32
:
212 TRACE ("BFD_RELOC_386_PLT32");
213 return &elf_howto_table
[(unsigned int) R_386_PLT32
];
215 case BFD_RELOC_386_COPY
:
216 TRACE ("BFD_RELOC_386_COPY");
217 return &elf_howto_table
[(unsigned int) R_386_COPY
];
219 case BFD_RELOC_386_GLOB_DAT
:
220 TRACE ("BFD_RELOC_386_GLOB_DAT");
221 return &elf_howto_table
[(unsigned int) R_386_GLOB_DAT
];
223 case BFD_RELOC_386_JUMP_SLOT
:
224 TRACE ("BFD_RELOC_386_JUMP_SLOT");
225 return &elf_howto_table
[(unsigned int) R_386_JUMP_SLOT
];
227 case BFD_RELOC_386_RELATIVE
:
228 TRACE ("BFD_RELOC_386_RELATIVE");
229 return &elf_howto_table
[(unsigned int) R_386_RELATIVE
];
231 case BFD_RELOC_386_GOTOFF
:
232 TRACE ("BFD_RELOC_386_GOTOFF");
233 return &elf_howto_table
[(unsigned int) R_386_GOTOFF
];
235 case BFD_RELOC_386_GOTPC
:
236 TRACE ("BFD_RELOC_386_GOTPC");
237 return &elf_howto_table
[(unsigned int) R_386_GOTPC
];
239 /* The remaining relocs are a GNU extension. */
241 TRACE ("BFD_RELOC_16");
242 return &elf_howto_table
[(unsigned int) R_386_16
- R_386_ext_offset
];
244 case BFD_RELOC_16_PCREL
:
245 TRACE ("BFD_RELOC_16_PCREL");
246 return &elf_howto_table
[(unsigned int) R_386_PC16
- R_386_ext_offset
];
249 TRACE ("BFD_RELOC_8");
250 return &elf_howto_table
[(unsigned int) R_386_8
- R_386_ext_offset
];
252 case BFD_RELOC_8_PCREL
:
253 TRACE ("BFD_RELOC_8_PCREL");
254 return &elf_howto_table
[(unsigned int) R_386_PC8
- R_386_ext_offset
];
256 case BFD_RELOC_VTABLE_INHERIT
:
257 TRACE ("BFD_RELOC_VTABLE_INHERIT");
258 return &elf_howto_table
[(unsigned int) R_386_GNU_VTINHERIT
261 case BFD_RELOC_VTABLE_ENTRY
:
262 TRACE ("BFD_RELOC_VTABLE_ENTRY");
263 return &elf_howto_table
[(unsigned int) R_386_GNU_VTENTRY
275 elf_i386_info_to_howto (abfd
, cache_ptr
, dst
)
276 bfd
*abfd ATTRIBUTE_UNUSED
;
277 arelent
*cache_ptr ATTRIBUTE_UNUSED
;
278 Elf32_Internal_Rela
*dst ATTRIBUTE_UNUSED
;
284 elf_i386_info_to_howto_rel (abfd
, cache_ptr
, dst
)
285 bfd
*abfd ATTRIBUTE_UNUSED
;
287 Elf32_Internal_Rel
*dst
;
289 unsigned int r_type
= ELF32_R_TYPE (dst
->r_info
);
292 if ((indx
= r_type
) >= R_386_standard
293 && ((indx
= r_type
- R_386_ext_offset
) - R_386_standard
294 >= R_386_ext
- R_386_standard
)
295 && ((indx
= r_type
- R_386_vt_offset
) - R_386_ext
296 >= R_386_vt
- R_386_ext
))
298 (*_bfd_error_handler
) (_("%s: invalid relocation type %d"),
299 bfd_archive_filename (abfd
), (int) r_type
);
300 indx
= (unsigned int) R_386_NONE
;
302 cache_ptr
->howto
= &elf_howto_table
[indx
];
305 /* Return whether a symbol name implies a local label. The UnixWare
306 2.1 cc generates temporary symbols that start with .X, so we
307 recognize them here. FIXME: do other SVR4 compilers also use .X?.
308 If so, we should move the .X recognition into
309 _bfd_elf_is_local_label_name. */
312 elf_i386_is_local_label_name (abfd
, name
)
316 if (name
[0] == '.' && name
[1] == 'X')
319 return _bfd_elf_is_local_label_name (abfd
, name
);
322 /* Support for core dump NOTE sections. */
324 elf_i386_grok_prstatus (abfd
, note
)
326 Elf_Internal_Note
*note
;
331 switch (note
->descsz
)
336 case 144: /* Linux/i386 */
338 elf_tdata (abfd
)->core_signal
= bfd_get_16 (abfd
, note
->descdata
+ 12);
341 elf_tdata (abfd
)->core_pid
= bfd_get_32 (abfd
, note
->descdata
+ 24);
350 /* Make a ".reg/999" section. */
351 return _bfd_elfcore_make_pseudosection (abfd
, ".reg",
352 raw_size
, note
->descpos
+ offset
);
356 elf_i386_grok_psinfo (abfd
, note
)
358 Elf_Internal_Note
*note
;
360 switch (note
->descsz
)
365 case 128: /* Linux/MIPS elf_prpsinfo */
366 elf_tdata (abfd
)->core_program
367 = _bfd_elfcore_strndup (abfd
, note
->descdata
+ 28, 16);
368 elf_tdata (abfd
)->core_command
369 = _bfd_elfcore_strndup (abfd
, note
->descdata
+ 44, 80);
372 /* Note that for some reason, a spurious space is tacked
373 onto the end of the args in some (at least one anyway)
374 implementations, so strip it off if it exists. */
377 char *command
= elf_tdata (abfd
)->core_command
;
378 int n
= strlen (command
);
380 if (0 < n
&& command
[n
- 1] == ' ')
381 command
[n
- 1] = '\0';
387 /* Functions for the i386 ELF linker.
389 In order to gain some understanding of code in this file without
390 knowing all the intricate details of the linker, note the
393 Functions named elf_i386_* are called by external routines, other
394 functions are only called locally. elf_i386_* functions appear
395 in this file more or less in the order in which they are called
396 from external routines. eg. elf_i386_check_relocs is called
397 early in the link process, elf_i386_finish_dynamic_sections is
398 one of the last functions. */
401 /* The name of the dynamic interpreter. This is put in the .interp
404 #define ELF_DYNAMIC_INTERPRETER "/usr/lib/libc.so.1"
406 /* The size in bytes of an entry in the procedure linkage table. */
408 #define PLT_ENTRY_SIZE 16
410 /* The first entry in an absolute procedure linkage table looks like
411 this. See the SVR4 ABI i386 supplement to see how this works. */
413 static const bfd_byte elf_i386_plt0_entry
[PLT_ENTRY_SIZE
] =
415 0xff, 0x35, /* pushl contents of address */
416 0, 0, 0, 0, /* replaced with address of .got + 4. */
417 0xff, 0x25, /* jmp indirect */
418 0, 0, 0, 0, /* replaced with address of .got + 8. */
419 0, 0, 0, 0 /* pad out to 16 bytes. */
422 /* Subsequent entries in an absolute procedure linkage table look like
425 static const bfd_byte elf_i386_plt_entry
[PLT_ENTRY_SIZE
] =
427 0xff, 0x25, /* jmp indirect */
428 0, 0, 0, 0, /* replaced with address of this symbol in .got. */
429 0x68, /* pushl immediate */
430 0, 0, 0, 0, /* replaced with offset into relocation table. */
431 0xe9, /* jmp relative */
432 0, 0, 0, 0 /* replaced with offset to start of .plt. */
435 /* The first entry in a PIC procedure linkage table look like this. */
437 static const bfd_byte elf_i386_pic_plt0_entry
[PLT_ENTRY_SIZE
] =
439 0xff, 0xb3, 4, 0, 0, 0, /* pushl 4(%ebx) */
440 0xff, 0xa3, 8, 0, 0, 0, /* jmp *8(%ebx) */
441 0, 0, 0, 0 /* pad out to 16 bytes. */
444 /* Subsequent entries in a PIC procedure linkage table look like this. */
446 static const bfd_byte elf_i386_pic_plt_entry
[PLT_ENTRY_SIZE
] =
448 0xff, 0xa3, /* jmp *offset(%ebx) */
449 0, 0, 0, 0, /* replaced with offset of this symbol in .got. */
450 0x68, /* pushl immediate */
451 0, 0, 0, 0, /* replaced with offset into relocation table. */
452 0xe9, /* jmp relative */
453 0, 0, 0, 0 /* replaced with offset to start of .plt. */
456 /* The i386 linker needs to keep track of the number of relocs that it
457 decides to copy as dynamic relocs in check_relocs for each symbol.
458 This is so that it can later discard them if they are found to be
459 unnecessary. We store the information in a field extending the
460 regular ELF linker hash table. */
462 struct elf_i386_dyn_relocs
464 struct elf_i386_dyn_relocs
*next
;
466 /* The input section of the reloc. */
469 /* Total number of relocs copied for the input section. */
472 /* Number of pc-relative relocs copied for the input section. */
473 bfd_size_type pc_count
;
476 /* i386 ELF linker hash entry. */
478 struct elf_i386_link_hash_entry
480 struct elf_link_hash_entry elf
;
482 /* Track dynamic relocs copied for this symbol. */
483 struct elf_i386_dyn_relocs
*dyn_relocs
;
486 /* i386 ELF linker hash table. */
488 struct elf_i386_link_hash_table
490 struct elf_link_hash_table elf
;
492 /* Short-cuts to get to dynamic linker sections. */
501 /* Small local sym to section mapping cache. */
502 struct sym_sec_cache sym_sec
;
505 /* Get the i386 ELF linker hash table from a link_info structure. */
507 #define elf_i386_hash_table(p) \
508 ((struct elf_i386_link_hash_table *) ((p)->hash))
510 /* Create an entry in an i386 ELF linker hash table. */
512 static struct bfd_hash_entry
*
513 link_hash_newfunc (entry
, table
, string
)
514 struct bfd_hash_entry
*entry
;
515 struct bfd_hash_table
*table
;
518 /* Allocate the structure if it has not already been allocated by a
522 entry
= bfd_hash_allocate (table
,
523 sizeof (struct elf_i386_link_hash_entry
));
528 /* Call the allocation method of the superclass. */
529 entry
= _bfd_elf_link_hash_newfunc (entry
, table
, string
);
532 struct elf_i386_link_hash_entry
*eh
;
534 eh
= (struct elf_i386_link_hash_entry
*) entry
;
535 eh
->dyn_relocs
= NULL
;
541 /* Create an i386 ELF linker hash table. */
543 static struct bfd_link_hash_table
*
544 elf_i386_link_hash_table_create (abfd
)
547 struct elf_i386_link_hash_table
*ret
;
548 bfd_size_type amt
= sizeof (struct elf_i386_link_hash_table
);
550 ret
= (struct elf_i386_link_hash_table
*) bfd_alloc (abfd
, amt
);
554 if (! _bfd_elf_link_hash_table_init (&ret
->elf
, abfd
, link_hash_newfunc
))
556 bfd_release (abfd
, ret
);
567 ret
->sym_sec
.abfd
= NULL
;
569 return &ret
->elf
.root
;
572 /* Create .got, .gotplt, and .rel.got sections in DYNOBJ, and set up
573 shortcuts to them in our hash table. */
576 create_got_section (dynobj
, info
)
578 struct bfd_link_info
*info
;
580 struct elf_i386_link_hash_table
*htab
;
582 if (! _bfd_elf_create_got_section (dynobj
, info
))
585 htab
= elf_i386_hash_table (info
);
586 htab
->sgot
= bfd_get_section_by_name (dynobj
, ".got");
587 htab
->sgotplt
= bfd_get_section_by_name (dynobj
, ".got.plt");
588 if (!htab
->sgot
|| !htab
->sgotplt
)
591 htab
->srelgot
= bfd_make_section (dynobj
, ".rel.got");
592 if (htab
->srelgot
== NULL
593 || ! bfd_set_section_flags (dynobj
, htab
->srelgot
,
594 (SEC_ALLOC
| SEC_LOAD
| SEC_HAS_CONTENTS
595 | SEC_IN_MEMORY
| SEC_LINKER_CREATED
597 || ! bfd_set_section_alignment (dynobj
, htab
->srelgot
, 2))
602 /* Create .plt, .rel.plt, .got, .got.plt, .rel.got, .dynbss, and
603 .rel.bss sections in DYNOBJ, and set up shortcuts to them in our
607 elf_i386_create_dynamic_sections (dynobj
, info
)
609 struct bfd_link_info
*info
;
611 struct elf_i386_link_hash_table
*htab
;
613 htab
= elf_i386_hash_table (info
);
614 if (!htab
->sgot
&& !create_got_section (dynobj
, info
))
617 if (!_bfd_elf_create_dynamic_sections (dynobj
, info
))
620 htab
->splt
= bfd_get_section_by_name (dynobj
, ".plt");
621 htab
->srelplt
= bfd_get_section_by_name (dynobj
, ".rel.plt");
622 htab
->sdynbss
= bfd_get_section_by_name (dynobj
, ".dynbss");
624 htab
->srelbss
= bfd_get_section_by_name (dynobj
, ".rel.bss");
626 if (!htab
->splt
|| !htab
->srelplt
|| !htab
->sdynbss
627 || (!info
->shared
&& !htab
->srelbss
))
633 /* Copy the extra info we tack onto an elf_link_hash_entry. */
636 elf_i386_copy_indirect_symbol (dir
, ind
)
637 struct elf_link_hash_entry
*dir
, *ind
;
639 struct elf_i386_link_hash_entry
*edir
, *eind
;
641 edir
= (struct elf_i386_link_hash_entry
*) dir
;
642 eind
= (struct elf_i386_link_hash_entry
*) ind
;
644 if (eind
->dyn_relocs
!= NULL
)
646 if (edir
->dyn_relocs
!= NULL
)
648 struct elf_i386_dyn_relocs
**pp
;
649 struct elf_i386_dyn_relocs
*p
;
651 if (ind
->root
.type
== bfd_link_hash_indirect
)
654 /* Add reloc counts against the weak sym to the strong sym
655 list. Merge any entries against the same section. */
656 for (pp
= &eind
->dyn_relocs
; (p
= *pp
) != NULL
; )
658 struct elf_i386_dyn_relocs
*q
;
660 for (q
= edir
->dyn_relocs
; q
!= NULL
; q
= q
->next
)
661 if (q
->sec
== p
->sec
)
663 q
->pc_count
+= p
->pc_count
;
664 q
->count
+= p
->count
;
671 *pp
= edir
->dyn_relocs
;
674 edir
->dyn_relocs
= eind
->dyn_relocs
;
675 eind
->dyn_relocs
= NULL
;
678 _bfd_elf_link_hash_copy_indirect (dir
, ind
);
681 /* Look through the relocs for a section during the first phase, and
682 calculate needed space in the global offset table, procedure linkage
683 table, and dynamic reloc sections. */
686 elf_i386_check_relocs (abfd
, info
, sec
, relocs
)
688 struct bfd_link_info
*info
;
690 const Elf_Internal_Rela
*relocs
;
692 struct elf_i386_link_hash_table
*htab
;
693 Elf_Internal_Shdr
*symtab_hdr
;
694 struct elf_link_hash_entry
**sym_hashes
;
695 const Elf_Internal_Rela
*rel
;
696 const Elf_Internal_Rela
*rel_end
;
699 if (info
->relocateable
)
702 htab
= elf_i386_hash_table (info
);
703 symtab_hdr
= &elf_tdata (abfd
)->symtab_hdr
;
704 sym_hashes
= elf_sym_hashes (abfd
);
708 rel_end
= relocs
+ sec
->reloc_count
;
709 for (rel
= relocs
; rel
< rel_end
; rel
++)
711 unsigned long r_symndx
;
712 struct elf_link_hash_entry
*h
;
714 r_symndx
= ELF32_R_SYM (rel
->r_info
);
716 if (r_symndx
>= NUM_SHDR_ENTRIES (symtab_hdr
))
718 (*_bfd_error_handler
) (_("%s: bad symbol index: %d"),
719 bfd_archive_filename (abfd
),
724 if (r_symndx
< symtab_hdr
->sh_info
)
727 h
= sym_hashes
[r_symndx
- symtab_hdr
->sh_info
];
729 switch (ELF32_R_TYPE (rel
->r_info
))
732 /* This symbol requires a global offset table entry. */
735 h
->got
.refcount
+= 1;
739 bfd_signed_vma
*local_got_refcounts
;
741 /* This is a global offset table entry for a local symbol. */
742 local_got_refcounts
= elf_local_got_refcounts (abfd
);
743 if (local_got_refcounts
== NULL
)
747 size
= symtab_hdr
->sh_info
;
748 size
*= sizeof (bfd_signed_vma
);
749 local_got_refcounts
= ((bfd_signed_vma
*)
750 bfd_zalloc (abfd
, size
));
751 if (local_got_refcounts
== NULL
)
753 elf_local_got_refcounts (abfd
) = local_got_refcounts
;
755 local_got_refcounts
[r_symndx
] += 1;
761 if (htab
->sgot
== NULL
)
763 if (htab
->elf
.dynobj
== NULL
)
764 htab
->elf
.dynobj
= abfd
;
765 if (!create_got_section (htab
->elf
.dynobj
, info
))
771 /* This symbol requires a procedure linkage table entry. We
772 actually build the entry in adjust_dynamic_symbol,
773 because this might be a case of linking PIC code which is
774 never referenced by a dynamic object, in which case we
775 don't need to generate a procedure linkage table entry
778 /* If this is a local symbol, we resolve it directly without
779 creating a procedure linkage table entry. */
783 h
->elf_link_hash_flags
|= ELF_LINK_HASH_NEEDS_PLT
;
784 h
->plt
.refcount
+= 1;
789 if (h
!= NULL
&& !info
->shared
)
791 /* If this reloc is in a read-only section, we might
792 need a copy reloc. We can't check reliably at this
793 stage whether the section is read-only, as input
794 sections have not yet been mapped to output sections.
795 Tentatively set the flag for now, and correct in
796 adjust_dynamic_symbol. */
797 h
->elf_link_hash_flags
|= ELF_LINK_NON_GOT_REF
;
799 /* We may need a .plt entry if the function this reloc
800 refers to is in a shared lib. */
801 h
->plt
.refcount
+= 1;
804 /* If we are creating a shared library, and this is a reloc
805 against a global symbol, or a non PC relative reloc
806 against a local symbol, then we need to copy the reloc
807 into the shared library. However, if we are linking with
808 -Bsymbolic, we do not need to copy a reloc against a
809 global symbol which is defined in an object we are
810 including in the link (i.e., DEF_REGULAR is set). At
811 this point we have not seen all the input files, so it is
812 possible that DEF_REGULAR is not set now but will be set
813 later (it is never cleared). In case of a weak definition,
814 DEF_REGULAR may be cleared later by a strong definition in
815 a shared library. We account for that possibility below by
816 storing information in the relocs_copied field of the hash
817 table entry. A similar situation occurs when creating
818 shared libraries and symbol visibility changes render the
821 If on the other hand, we are creating an executable, we
822 may need to keep relocations for symbols satisfied by a
823 dynamic library if we manage to avoid copy relocs for the
826 && (sec
->flags
& SEC_ALLOC
) != 0
827 && (ELF32_R_TYPE (rel
->r_info
) != R_386_PC32
830 || h
->root
.type
== bfd_link_hash_defweak
831 || (h
->elf_link_hash_flags
832 & ELF_LINK_HASH_DEF_REGULAR
) == 0))))
834 && (sec
->flags
& SEC_ALLOC
) != 0
836 && (h
->root
.type
== bfd_link_hash_defweak
837 || (h
->elf_link_hash_flags
838 & ELF_LINK_HASH_DEF_REGULAR
) == 0)))
840 struct elf_i386_dyn_relocs
*p
;
841 struct elf_i386_dyn_relocs
**head
;
843 /* We must copy these reloc types into the output file.
844 Create a reloc section in dynobj and make room for
851 name
= (bfd_elf_string_from_elf_section
853 elf_elfheader (abfd
)->e_shstrndx
,
854 elf_section_data (sec
)->rel_hdr
.sh_name
));
858 if (strncmp (name
, ".rel", 4) != 0
859 || strcmp (bfd_get_section_name (abfd
, sec
),
862 (*_bfd_error_handler
)
863 (_("%s: bad relocation section name `%s\'"),
864 bfd_archive_filename (abfd
), name
);
867 if (htab
->elf
.dynobj
== NULL
)
868 htab
->elf
.dynobj
= abfd
;
870 dynobj
= htab
->elf
.dynobj
;
871 sreloc
= bfd_get_section_by_name (dynobj
, name
);
876 sreloc
= bfd_make_section (dynobj
, name
);
877 flags
= (SEC_HAS_CONTENTS
| SEC_READONLY
878 | SEC_IN_MEMORY
| SEC_LINKER_CREATED
);
879 if ((sec
->flags
& SEC_ALLOC
) != 0)
880 flags
|= SEC_ALLOC
| SEC_LOAD
;
882 || ! bfd_set_section_flags (dynobj
, sreloc
, flags
)
883 || ! bfd_set_section_alignment (dynobj
, sreloc
, 2))
886 elf_section_data (sec
)->sreloc
= sreloc
;
889 /* If this is a global symbol, we count the number of
890 relocations we need for this symbol. */
893 head
= &((struct elf_i386_link_hash_entry
*) h
)->dyn_relocs
;
897 /* Track dynamic relocs needed for local syms too.
898 We really need local syms available to do this
902 s
= bfd_section_from_r_symndx (abfd
, &htab
->sym_sec
,
907 head
= ((struct elf_i386_dyn_relocs
**)
908 &elf_section_data (s
)->local_dynrel
);
912 if (p
== NULL
|| p
->sec
!= sec
)
914 bfd_size_type amt
= sizeof *p
;
915 p
= ((struct elf_i386_dyn_relocs
*)
916 bfd_alloc (htab
->elf
.dynobj
, amt
));
927 if (ELF32_R_TYPE (rel
->r_info
) == R_386_PC32
)
932 /* This relocation describes the C++ object vtable hierarchy.
933 Reconstruct it for later use during GC. */
934 case R_386_GNU_VTINHERIT
:
935 if (!_bfd_elf32_gc_record_vtinherit (abfd
, sec
, h
, rel
->r_offset
))
939 /* This relocation describes which C++ vtable entries are actually
940 used. Record for later use during GC. */
941 case R_386_GNU_VTENTRY
:
942 if (!_bfd_elf32_gc_record_vtentry (abfd
, sec
, h
, rel
->r_offset
))
954 /* Return the section that should be marked against GC for a given
958 elf_i386_gc_mark_hook (abfd
, info
, rel
, h
, sym
)
960 struct bfd_link_info
*info ATTRIBUTE_UNUSED
;
961 Elf_Internal_Rela
*rel
;
962 struct elf_link_hash_entry
*h
;
963 Elf_Internal_Sym
*sym
;
967 switch (ELF32_R_TYPE (rel
->r_info
))
969 case R_386_GNU_VTINHERIT
:
970 case R_386_GNU_VTENTRY
:
974 switch (h
->root
.type
)
976 case bfd_link_hash_defined
:
977 case bfd_link_hash_defweak
:
978 return h
->root
.u
.def
.section
;
980 case bfd_link_hash_common
:
981 return h
->root
.u
.c
.p
->section
;
990 if (!(elf_bad_symtab (abfd
)
991 && ELF_ST_BIND (sym
->st_info
) != STB_LOCAL
)
992 && ! ((sym
->st_shndx
<= 0 || sym
->st_shndx
>= SHN_LORESERVE
)
993 && sym
->st_shndx
!= SHN_COMMON
))
995 return bfd_section_from_elf_index (abfd
, sym
->st_shndx
);
1002 /* Update the got entry reference counts for the section being removed. */
1005 elf_i386_gc_sweep_hook (abfd
, info
, sec
, relocs
)
1007 struct bfd_link_info
*info
;
1009 const Elf_Internal_Rela
*relocs
;
1011 Elf_Internal_Shdr
*symtab_hdr
;
1012 struct elf_link_hash_entry
**sym_hashes
;
1013 bfd_signed_vma
*local_got_refcounts
;
1014 const Elf_Internal_Rela
*rel
, *relend
;
1015 unsigned long r_symndx
;
1016 struct elf_link_hash_entry
*h
;
1018 elf_section_data (sec
)->local_dynrel
= NULL
;
1020 symtab_hdr
= &elf_tdata (abfd
)->symtab_hdr
;
1021 sym_hashes
= elf_sym_hashes (abfd
);
1022 local_got_refcounts
= elf_local_got_refcounts (abfd
);
1024 relend
= relocs
+ sec
->reloc_count
;
1025 for (rel
= relocs
; rel
< relend
; rel
++)
1026 switch (ELF32_R_TYPE (rel
->r_info
))
1031 r_symndx
= ELF32_R_SYM (rel
->r_info
);
1032 if (r_symndx
>= symtab_hdr
->sh_info
)
1034 h
= sym_hashes
[r_symndx
- symtab_hdr
->sh_info
];
1035 if (h
->got
.refcount
> 0)
1036 h
->got
.refcount
-= 1;
1038 else if (local_got_refcounts
!= NULL
)
1040 if (local_got_refcounts
[r_symndx
] > 0)
1041 local_got_refcounts
[r_symndx
] -= 1;
1047 r_symndx
= ELF32_R_SYM (rel
->r_info
);
1048 if (r_symndx
>= symtab_hdr
->sh_info
)
1050 struct elf_i386_link_hash_entry
*eh
;
1051 struct elf_i386_dyn_relocs
**pp
;
1052 struct elf_i386_dyn_relocs
*p
;
1054 h
= sym_hashes
[r_symndx
- symtab_hdr
->sh_info
];
1056 if (!info
->shared
&& h
->plt
.refcount
> 0)
1057 h
->plt
.refcount
-= 1;
1059 eh
= (struct elf_i386_link_hash_entry
*) h
;
1061 for (pp
= &eh
->dyn_relocs
; (p
= *pp
) != NULL
; pp
= &p
->next
)
1064 if (ELF32_R_TYPE (rel
->r_info
) == R_386_PC32
)
1075 r_symndx
= ELF32_R_SYM (rel
->r_info
);
1076 if (r_symndx
>= symtab_hdr
->sh_info
)
1078 h
= sym_hashes
[r_symndx
- symtab_hdr
->sh_info
];
1079 if (h
->plt
.refcount
> 0)
1080 h
->plt
.refcount
-= 1;
1091 /* Adjust a symbol defined by a dynamic object and referenced by a
1092 regular object. The current definition is in some section of the
1093 dynamic object, but we're not including those sections. We have to
1094 change the definition to something the rest of the link can
1098 elf_i386_adjust_dynamic_symbol (info
, h
)
1099 struct bfd_link_info
*info
;
1100 struct elf_link_hash_entry
*h
;
1102 struct elf_i386_link_hash_table
*htab
;
1103 struct elf_i386_link_hash_entry
* eh
;
1104 struct elf_i386_dyn_relocs
*p
;
1106 unsigned int power_of_two
;
1108 /* If this is a function, put it in the procedure linkage table. We
1109 will fill in the contents of the procedure linkage table later,
1110 when we know the address of the .got section. */
1111 if (h
->type
== STT_FUNC
1112 || (h
->elf_link_hash_flags
& ELF_LINK_HASH_NEEDS_PLT
) != 0)
1114 if (h
->plt
.refcount
<= 0
1116 && (h
->elf_link_hash_flags
& ELF_LINK_HASH_DEF_DYNAMIC
) == 0
1117 && (h
->elf_link_hash_flags
& ELF_LINK_HASH_REF_DYNAMIC
) == 0))
1119 /* This case can occur if we saw a PLT32 reloc in an input
1120 file, but the symbol was never referred to by a dynamic
1121 object, or if all references were garbage collected. In
1122 such a case, we don't actually need to build a procedure
1123 linkage table, and we can just do a PC32 reloc instead. */
1124 h
->plt
.offset
= (bfd_vma
) -1;
1125 h
->elf_link_hash_flags
&= ~ELF_LINK_HASH_NEEDS_PLT
;
1131 /* It's possible that we incorrectly decided a .plt reloc was
1132 needed for an R_386_PC32 reloc to a non-function sym in
1133 check_relocs. We can't decide accurately between function and
1134 non-function syms in check-relocs; Objects loaded later in
1135 the link may change h->type. So fix it now. */
1136 h
->plt
.offset
= (bfd_vma
) -1;
1138 /* If this is a weak symbol, and there is a real definition, the
1139 processor independent code will have arranged for us to see the
1140 real definition first, and we can just use the same value. */
1141 if (h
->weakdef
!= NULL
)
1143 BFD_ASSERT (h
->weakdef
->root
.type
== bfd_link_hash_defined
1144 || h
->weakdef
->root
.type
== bfd_link_hash_defweak
);
1145 h
->root
.u
.def
.section
= h
->weakdef
->root
.u
.def
.section
;
1146 h
->root
.u
.def
.value
= h
->weakdef
->root
.u
.def
.value
;
1150 /* This is a reference to a symbol defined by a dynamic object which
1151 is not a function. */
1153 /* If we are creating a shared library, we must presume that the
1154 only references to the symbol are via the global offset table.
1155 For such cases we need not do anything here; the relocations will
1156 be handled correctly by relocate_section. */
1160 /* If there are no references to this symbol that do not use the
1161 GOT, we don't need to generate a copy reloc. */
1162 if ((h
->elf_link_hash_flags
& ELF_LINK_NON_GOT_REF
) == 0)
1165 /* If -z nocopyreloc was given, we won't generate them either. */
1166 if (info
->nocopyreloc
)
1168 h
->elf_link_hash_flags
&= ~ELF_LINK_NON_GOT_REF
;
1172 eh
= (struct elf_i386_link_hash_entry
*) h
;
1173 for (p
= eh
->dyn_relocs
; p
!= NULL
; p
= p
->next
)
1175 s
= p
->sec
->output_section
;
1176 if (s
!= NULL
&& (s
->flags
& SEC_READONLY
) != 0)
1180 /* If we didn't find any dynamic relocs in read-only sections, then
1181 we'll be keeping the dynamic relocs and avoiding the copy reloc. */
1184 h
->elf_link_hash_flags
&= ~ELF_LINK_NON_GOT_REF
;
1188 /* We must allocate the symbol in our .dynbss section, which will
1189 become part of the .bss section of the executable. There will be
1190 an entry for this symbol in the .dynsym section. The dynamic
1191 object will contain position independent code, so all references
1192 from the dynamic object to this symbol will go through the global
1193 offset table. The dynamic linker will use the .dynsym entry to
1194 determine the address it must put in the global offset table, so
1195 both the dynamic object and the regular object will refer to the
1196 same memory location for the variable. */
1198 htab
= elf_i386_hash_table (info
);
1200 /* We must generate a R_386_COPY reloc to tell the dynamic linker to
1201 copy the initial value out of the dynamic object and into the
1202 runtime process image. */
1203 if ((h
->root
.u
.def
.section
->flags
& SEC_ALLOC
) != 0)
1205 htab
->srelbss
->_raw_size
+= sizeof (Elf32_External_Rel
);
1206 h
->elf_link_hash_flags
|= ELF_LINK_HASH_NEEDS_COPY
;
1209 /* We need to figure out the alignment required for this symbol. I
1210 have no idea how ELF linkers handle this. */
1211 power_of_two
= bfd_log2 (h
->size
);
1212 if (power_of_two
> 3)
1215 /* Apply the required alignment. */
1217 s
->_raw_size
= BFD_ALIGN (s
->_raw_size
, (bfd_size_type
) (1 << power_of_two
));
1218 if (power_of_two
> bfd_get_section_alignment (htab
->elf
.dynobj
, s
))
1220 if (! bfd_set_section_alignment (htab
->elf
.dynobj
, s
, power_of_two
))
1224 /* Define the symbol as being at this point in the section. */
1225 h
->root
.u
.def
.section
= s
;
1226 h
->root
.u
.def
.value
= s
->_raw_size
;
1228 /* Increment the section size to make room for the symbol. */
1229 s
->_raw_size
+= h
->size
;
1234 /* This is the condition under which elf_i386_finish_dynamic_symbol
1235 will be called from elflink.h. If elflink.h doesn't call our
1236 finish_dynamic_symbol routine, we'll need to do something about
1237 initializing any .plt and .got entries in elf_i386_relocate_section. */
1238 #define WILL_CALL_FINISH_DYNAMIC_SYMBOL(DYN, INFO, H) \
1240 && ((INFO)->shared \
1241 || ((H)->elf_link_hash_flags & ELF_LINK_FORCED_LOCAL) == 0) \
1242 && ((H)->dynindx != -1 \
1243 || ((H)->elf_link_hash_flags & ELF_LINK_FORCED_LOCAL) != 0))
1245 /* Allocate space in .plt, .got and associated reloc sections for
1249 allocate_dynrelocs (h
, inf
)
1250 struct elf_link_hash_entry
*h
;
1253 struct bfd_link_info
*info
;
1254 struct elf_i386_link_hash_table
*htab
;
1255 struct elf_i386_link_hash_entry
*eh
;
1256 struct elf_i386_dyn_relocs
*p
;
1258 if (h
->root
.type
== bfd_link_hash_indirect
1259 || h
->root
.type
== bfd_link_hash_warning
)
1262 info
= (struct bfd_link_info
*) inf
;
1263 htab
= elf_i386_hash_table (info
);
1265 if (htab
->elf
.dynamic_sections_created
1266 && h
->plt
.refcount
> 0)
1268 /* Make sure this symbol is output as a dynamic symbol.
1269 Undefined weak syms won't yet be marked as dynamic. */
1270 if (h
->dynindx
== -1
1271 && (h
->elf_link_hash_flags
& ELF_LINK_FORCED_LOCAL
) == 0)
1273 if (! bfd_elf32_link_record_dynamic_symbol (info
, h
))
1277 if (WILL_CALL_FINISH_DYNAMIC_SYMBOL (1, info
, h
))
1279 asection
*s
= htab
->splt
;
1281 /* If this is the first .plt entry, make room for the special
1283 if (s
->_raw_size
== 0)
1284 s
->_raw_size
+= PLT_ENTRY_SIZE
;
1286 h
->plt
.offset
= s
->_raw_size
;
1288 /* If this symbol is not defined in a regular file, and we are
1289 not generating a shared library, then set the symbol to this
1290 location in the .plt. This is required to make function
1291 pointers compare as equal between the normal executable and
1292 the shared library. */
1294 && (h
->elf_link_hash_flags
& ELF_LINK_HASH_DEF_REGULAR
) == 0)
1296 h
->root
.u
.def
.section
= s
;
1297 h
->root
.u
.def
.value
= h
->plt
.offset
;
1300 /* Make room for this entry. */
1301 s
->_raw_size
+= PLT_ENTRY_SIZE
;
1303 /* We also need to make an entry in the .got.plt section, which
1304 will be placed in the .got section by the linker script. */
1305 htab
->sgotplt
->_raw_size
+= 4;
1307 /* We also need to make an entry in the .rel.plt section. */
1308 htab
->srelplt
->_raw_size
+= sizeof (Elf32_External_Rel
);
1312 h
->plt
.offset
= (bfd_vma
) -1;
1313 h
->elf_link_hash_flags
&= ~ELF_LINK_HASH_NEEDS_PLT
;
1318 h
->plt
.offset
= (bfd_vma
) -1;
1319 h
->elf_link_hash_flags
&= ~ELF_LINK_HASH_NEEDS_PLT
;
1322 if (h
->got
.refcount
> 0)
1327 /* Make sure this symbol is output as a dynamic symbol.
1328 Undefined weak syms won't yet be marked as dynamic. */
1329 if (h
->dynindx
== -1
1330 && (h
->elf_link_hash_flags
& ELF_LINK_FORCED_LOCAL
) == 0)
1332 if (! bfd_elf32_link_record_dynamic_symbol (info
, h
))
1337 h
->got
.offset
= s
->_raw_size
;
1339 dyn
= htab
->elf
.dynamic_sections_created
;
1340 if (WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn
, info
, h
))
1341 htab
->srelgot
->_raw_size
+= sizeof (Elf32_External_Rel
);
1344 h
->got
.offset
= (bfd_vma
) -1;
1346 eh
= (struct elf_i386_link_hash_entry
*) h
;
1347 if (eh
->dyn_relocs
== NULL
)
1350 /* In the shared -Bsymbolic case, discard space allocated for
1351 dynamic pc-relative relocs against symbols which turn out to be
1352 defined in regular objects. For the normal shared case, discard
1353 space for pc-relative relocs that have become local due to symbol
1354 visibility changes. */
1358 if ((h
->elf_link_hash_flags
& ELF_LINK_HASH_DEF_REGULAR
) != 0
1359 && ((h
->elf_link_hash_flags
& ELF_LINK_FORCED_LOCAL
) != 0
1362 struct elf_i386_dyn_relocs
**pp
;
1364 for (pp
= &eh
->dyn_relocs
; (p
= *pp
) != NULL
; )
1366 p
->count
-= p
->pc_count
;
1377 /* For the non-shared case, discard space for relocs against
1378 symbols which turn out to need copy relocs or are not
1381 if ((h
->elf_link_hash_flags
& ELF_LINK_NON_GOT_REF
) == 0
1382 && (((h
->elf_link_hash_flags
& ELF_LINK_HASH_DEF_DYNAMIC
) != 0
1383 && (h
->elf_link_hash_flags
& ELF_LINK_HASH_DEF_REGULAR
) == 0)
1384 || (htab
->elf
.dynamic_sections_created
1385 && (h
->root
.type
== bfd_link_hash_undefweak
1386 || h
->root
.type
== bfd_link_hash_undefined
))))
1388 /* Make sure this symbol is output as a dynamic symbol.
1389 Undefined weak syms won't yet be marked as dynamic. */
1390 if (h
->dynindx
== -1
1391 && (h
->elf_link_hash_flags
& ELF_LINK_FORCED_LOCAL
) == 0)
1393 if (! bfd_elf32_link_record_dynamic_symbol (info
, h
))
1397 /* If that succeeded, we know we'll be keeping all the
1399 if (h
->dynindx
!= -1)
1403 eh
->dyn_relocs
= NULL
;
1408 /* Finally, allocate space. */
1409 for (p
= eh
->dyn_relocs
; p
!= NULL
; p
= p
->next
)
1411 asection
*sreloc
= elf_section_data (p
->sec
)->sreloc
;
1412 sreloc
->_raw_size
+= p
->count
* sizeof (Elf32_External_Rel
);
1418 /* Find any dynamic relocs that apply to read-only sections. */
1421 readonly_dynrelocs (h
, inf
)
1422 struct elf_link_hash_entry
*h
;
1425 struct elf_i386_link_hash_entry
*eh
;
1426 struct elf_i386_dyn_relocs
*p
;
1428 eh
= (struct elf_i386_link_hash_entry
*) h
;
1429 for (p
= eh
->dyn_relocs
; p
!= NULL
; p
= p
->next
)
1431 asection
*s
= p
->sec
->output_section
;
1433 if (s
!= NULL
&& (s
->flags
& SEC_READONLY
) != 0)
1435 struct bfd_link_info
*info
= (struct bfd_link_info
*) inf
;
1437 info
->flags
|= DF_TEXTREL
;
1439 /* Not an error, just cut short the traversal. */
1446 /* Set the sizes of the dynamic sections. */
1449 elf_i386_size_dynamic_sections (output_bfd
, info
)
1450 bfd
*output_bfd ATTRIBUTE_UNUSED
;
1451 struct bfd_link_info
*info
;
1453 struct elf_i386_link_hash_table
*htab
;
1459 htab
= elf_i386_hash_table (info
);
1460 dynobj
= htab
->elf
.dynobj
;
1464 if (htab
->elf
.dynamic_sections_created
)
1466 /* Set the contents of the .interp section to the interpreter. */
1469 s
= bfd_get_section_by_name (dynobj
, ".interp");
1472 s
->_raw_size
= sizeof ELF_DYNAMIC_INTERPRETER
;
1473 s
->contents
= (unsigned char *) ELF_DYNAMIC_INTERPRETER
;
1477 /* Set up .got offsets for local syms, and space for local dynamic
1479 for (ibfd
= info
->input_bfds
; ibfd
!= NULL
; ibfd
= ibfd
->link_next
)
1481 bfd_signed_vma
*local_got
;
1482 bfd_signed_vma
*end_local_got
;
1483 bfd_size_type locsymcount
;
1484 Elf_Internal_Shdr
*symtab_hdr
;
1487 if (bfd_get_flavour (ibfd
) != bfd_target_elf_flavour
)
1490 for (s
= ibfd
->sections
; s
!= NULL
; s
= s
->next
)
1492 struct elf_i386_dyn_relocs
*p
;
1494 for (p
= *((struct elf_i386_dyn_relocs
**)
1495 &elf_section_data (s
)->local_dynrel
);
1499 if (!bfd_is_abs_section (p
->sec
)
1500 && bfd_is_abs_section (p
->sec
->output_section
))
1502 /* Input section has been discarded, either because
1503 it is a copy of a linkonce section or due to
1504 linker script /DISCARD/, so we'll be discarding
1509 srel
= elf_section_data (p
->sec
)->sreloc
;
1510 srel
->_raw_size
+= p
->count
* sizeof (Elf32_External_Rel
);
1515 local_got
= elf_local_got_refcounts (ibfd
);
1519 symtab_hdr
= &elf_tdata (ibfd
)->symtab_hdr
;
1520 locsymcount
= symtab_hdr
->sh_info
;
1521 end_local_got
= local_got
+ locsymcount
;
1523 srel
= htab
->srelgot
;
1524 for (; local_got
< end_local_got
; ++local_got
)
1528 *local_got
= s
->_raw_size
;
1531 srel
->_raw_size
+= sizeof (Elf32_External_Rel
);
1534 *local_got
= (bfd_vma
) -1;
1538 /* Allocate global sym .plt and .got entries, and space for global
1539 sym dynamic relocs. */
1540 elf_link_hash_traverse (&htab
->elf
, allocate_dynrelocs
, (PTR
) info
);
1542 /* We now have determined the sizes of the various dynamic sections.
1543 Allocate memory for them. */
1545 for (s
= dynobj
->sections
; s
!= NULL
; s
= s
->next
)
1547 if ((s
->flags
& SEC_LINKER_CREATED
) == 0)
1552 || s
== htab
->sgotplt
)
1554 /* Strip this section if we don't need it; see the
1557 else if (strncmp (bfd_get_section_name (dynobj
, s
), ".rel", 4) == 0)
1559 if (s
->_raw_size
!= 0 && s
!= htab
->srelplt
)
1562 /* We use the reloc_count field as a counter if we need
1563 to copy relocs into the output file. */
1568 /* It's not one of our sections, so don't allocate space. */
1572 if (s
->_raw_size
== 0)
1574 /* If we don't need this section, strip it from the
1575 output file. This is mostly to handle .rel.bss and
1576 .rel.plt. We must create both sections in
1577 create_dynamic_sections, because they must be created
1578 before the linker maps input sections to output
1579 sections. The linker does that before
1580 adjust_dynamic_symbol is called, and it is that
1581 function which decides whether anything needs to go
1582 into these sections. */
1584 _bfd_strip_section_from_output (info
, s
);
1588 /* Allocate memory for the section contents. We use bfd_zalloc
1589 here in case unused entries are not reclaimed before the
1590 section's contents are written out. This should not happen,
1591 but this way if it does, we get a R_386_NONE reloc instead
1593 s
->contents
= (bfd_byte
*) bfd_zalloc (dynobj
, s
->_raw_size
);
1594 if (s
->contents
== NULL
)
1598 if (htab
->elf
.dynamic_sections_created
)
1600 /* Add some entries to the .dynamic section. We fill in the
1601 values later, in elf_i386_finish_dynamic_sections, but we
1602 must add the entries now so that we get the correct size for
1603 the .dynamic section. The DT_DEBUG entry is filled in by the
1604 dynamic linker and used by the debugger. */
1605 #define add_dynamic_entry(TAG, VAL) \
1606 bfd_elf32_add_dynamic_entry (info, (bfd_vma) (TAG), (bfd_vma) (VAL))
1610 if (!add_dynamic_entry (DT_DEBUG
, 0))
1614 if (htab
->splt
->_raw_size
!= 0)
1616 if (!add_dynamic_entry (DT_PLTGOT
, 0)
1617 || !add_dynamic_entry (DT_PLTRELSZ
, 0)
1618 || !add_dynamic_entry (DT_PLTREL
, DT_REL
)
1619 || !add_dynamic_entry (DT_JMPREL
, 0))
1625 if (!add_dynamic_entry (DT_REL
, 0)
1626 || !add_dynamic_entry (DT_RELSZ
, 0)
1627 || !add_dynamic_entry (DT_RELENT
, sizeof (Elf32_External_Rel
)))
1630 /* If any dynamic relocs apply to a read-only section,
1631 then we need a DT_TEXTREL entry. */
1632 elf_link_hash_traverse (&htab
->elf
, readonly_dynrelocs
, (PTR
) info
);
1634 if ((info
->flags
& DF_TEXTREL
) != 0)
1636 if (!add_dynamic_entry (DT_TEXTREL
, 0))
1641 #undef add_dynamic_entry
1646 /* Set the correct type for an x86 ELF section. We do this by the
1647 section name, which is a hack, but ought to work. */
1650 elf_i386_fake_sections (abfd
, hdr
, sec
)
1651 bfd
*abfd ATTRIBUTE_UNUSED
;
1652 Elf32_Internal_Shdr
*hdr
;
1655 register const char *name
;
1657 name
= bfd_get_section_name (abfd
, sec
);
1659 /* This is an ugly, but unfortunately necessary hack that is
1660 needed when producing EFI binaries on x86. It tells
1661 elf.c:elf_fake_sections() not to consider ".reloc" as a section
1662 containing ELF relocation info. We need this hack in order to
1663 be able to generate ELF binaries that can be translated into
1664 EFI applications (which are essentially COFF objects). Those
1665 files contain a COFF ".reloc" section inside an ELFNN object,
1666 which would normally cause BFD to segfault because it would
1667 attempt to interpret this section as containing relocation
1668 entries for section "oc". With this hack enabled, ".reloc"
1669 will be treated as a normal data section, which will avoid the
1670 segfault. However, you won't be able to create an ELFNN binary
1671 with a section named "oc" that needs relocations, but that's
1672 the kind of ugly side-effects you get when detecting section
1673 types based on their names... In practice, this limitation is
1674 unlikely to bite. */
1675 if (strcmp (name
, ".reloc") == 0)
1676 hdr
->sh_type
= SHT_PROGBITS
;
1681 /* Relocate an i386 ELF section. */
1684 elf_i386_relocate_section (output_bfd
, info
, input_bfd
, input_section
,
1685 contents
, relocs
, local_syms
, local_sections
)
1687 struct bfd_link_info
*info
;
1689 asection
*input_section
;
1691 Elf_Internal_Rela
*relocs
;
1692 Elf_Internal_Sym
*local_syms
;
1693 asection
**local_sections
;
1695 struct elf_i386_link_hash_table
*htab
;
1696 Elf_Internal_Shdr
*symtab_hdr
;
1697 struct elf_link_hash_entry
**sym_hashes
;
1698 bfd_vma
*local_got_offsets
;
1699 Elf_Internal_Rela
*rel
;
1700 Elf_Internal_Rela
*relend
;
1702 htab
= elf_i386_hash_table (info
);
1703 symtab_hdr
= &elf_tdata (input_bfd
)->symtab_hdr
;
1704 sym_hashes
= elf_sym_hashes (input_bfd
);
1705 local_got_offsets
= elf_local_got_offsets (input_bfd
);
1708 relend
= relocs
+ input_section
->reloc_count
;
1709 for (; rel
< relend
; rel
++)
1712 reloc_howto_type
*howto
;
1713 unsigned long r_symndx
;
1714 struct elf_link_hash_entry
*h
;
1715 Elf_Internal_Sym
*sym
;
1719 boolean unresolved_reloc
;
1720 bfd_reloc_status_type r
;
1723 r_type
= ELF32_R_TYPE (rel
->r_info
);
1724 if (r_type
== (int) R_386_GNU_VTINHERIT
1725 || r_type
== (int) R_386_GNU_VTENTRY
)
1728 if ((indx
= (unsigned) r_type
) >= R_386_standard
1729 && ((indx
= (unsigned) r_type
- R_386_ext_offset
) - R_386_standard
1730 >= R_386_ext
- R_386_standard
))
1732 bfd_set_error (bfd_error_bad_value
);
1735 howto
= elf_howto_table
+ indx
;
1737 r_symndx
= ELF32_R_SYM (rel
->r_info
);
1739 if (info
->relocateable
)
1741 /* This is a relocatable link. We don't have to change
1742 anything, unless the reloc is against a section symbol,
1743 in which case we have to adjust according to where the
1744 section symbol winds up in the output section. */
1745 if (r_symndx
< symtab_hdr
->sh_info
)
1747 sym
= local_syms
+ r_symndx
;
1748 if (ELF_ST_TYPE (sym
->st_info
) == STT_SECTION
)
1752 sec
= local_sections
[r_symndx
];
1753 val
= bfd_get_32 (input_bfd
, contents
+ rel
->r_offset
);
1754 val
+= sec
->output_offset
+ sym
->st_value
;
1755 bfd_put_32 (input_bfd
, val
, contents
+ rel
->r_offset
);
1761 /* This is a final link. */
1765 unresolved_reloc
= false;
1766 if (r_symndx
< symtab_hdr
->sh_info
)
1768 sym
= local_syms
+ r_symndx
;
1769 sec
= local_sections
[r_symndx
];
1770 relocation
= (sec
->output_section
->vma
1771 + sec
->output_offset
1773 if ((sec
->flags
& SEC_MERGE
)
1774 && ELF_ST_TYPE (sym
->st_info
) == STT_SECTION
)
1779 if (howto
->src_mask
!= 0xffffffff)
1781 (*_bfd_error_handler
)
1782 (_("%s(%s+0x%lx): %s relocation against SEC_MERGE section"),
1783 bfd_archive_filename (input_bfd
),
1784 bfd_get_section_name (input_bfd
, input_section
),
1785 (long) rel
->r_offset
, howto
->name
);
1789 addend
= bfd_get_32 (input_bfd
, contents
+ rel
->r_offset
);
1792 _bfd_merged_section_offset (output_bfd
, &msec
,
1793 elf_section_data (sec
)->merge_info
,
1794 sym
->st_value
+ addend
, (bfd_vma
) 0)
1796 addend
+= msec
->output_section
->vma
+ msec
->output_offset
;
1797 bfd_put_32 (input_bfd
, addend
, contents
+ rel
->r_offset
);
1802 h
= sym_hashes
[r_symndx
- symtab_hdr
->sh_info
];
1803 while (h
->root
.type
== bfd_link_hash_indirect
1804 || h
->root
.type
== bfd_link_hash_warning
)
1805 h
= (struct elf_link_hash_entry
*) h
->root
.u
.i
.link
;
1808 if (h
->root
.type
== bfd_link_hash_defined
1809 || h
->root
.type
== bfd_link_hash_defweak
)
1811 sec
= h
->root
.u
.def
.section
;
1812 if (sec
->output_section
== NULL
)
1813 /* Set a flag that will be cleared later if we find a
1814 relocation value for this symbol. output_section
1815 is typically NULL for symbols satisfied by a shared
1817 unresolved_reloc
= true;
1819 relocation
= (h
->root
.u
.def
.value
1820 + sec
->output_section
->vma
1821 + sec
->output_offset
);
1823 else if (h
->root
.type
== bfd_link_hash_undefweak
)
1825 else if (info
->shared
1826 && (!info
->symbolic
|| info
->allow_shlib_undefined
)
1827 && !info
->no_undefined
1828 && ELF_ST_VISIBILITY (h
->other
) == STV_DEFAULT
)
1832 if (! ((*info
->callbacks
->undefined_symbol
)
1833 (info
, h
->root
.root
.string
, input_bfd
,
1834 input_section
, rel
->r_offset
,
1835 (!info
->shared
|| info
->no_undefined
1836 || ELF_ST_VISIBILITY (h
->other
)))))
1844 /* Relocation is to the entry for this symbol in the global
1846 if (htab
->sgot
== NULL
)
1853 off
= h
->got
.offset
;
1854 dyn
= htab
->elf
.dynamic_sections_created
;
1855 if (! WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn
, info
, h
)
1859 || (h
->elf_link_hash_flags
& ELF_LINK_FORCED_LOCAL
))
1860 && (h
->elf_link_hash_flags
& ELF_LINK_HASH_DEF_REGULAR
)))
1862 /* This is actually a static link, or it is a
1863 -Bsymbolic link and the symbol is defined
1864 locally, or the symbol was forced to be local
1865 because of a version file. We must initialize
1866 this entry in the global offset table. Since the
1867 offset must always be a multiple of 4, we use the
1868 least significant bit to record whether we have
1869 initialized it already.
1871 When doing a dynamic link, we create a .rel.got
1872 relocation entry to initialize the value. This
1873 is done in the finish_dynamic_symbol routine. */
1878 bfd_put_32 (output_bfd
, relocation
,
1879 htab
->sgot
->contents
+ off
);
1884 unresolved_reloc
= false;
1888 if (local_got_offsets
== NULL
)
1891 off
= local_got_offsets
[r_symndx
];
1893 /* The offset must always be a multiple of 4. We use
1894 the least significant bit to record whether we have
1895 already generated the necessary reloc. */
1900 bfd_put_32 (output_bfd
, relocation
,
1901 htab
->sgot
->contents
+ off
);
1906 Elf_Internal_Rel outrel
;
1907 Elf32_External_Rel
*loc
;
1909 srelgot
= htab
->srelgot
;
1910 if (srelgot
== NULL
)
1913 outrel
.r_offset
= (htab
->sgot
->output_section
->vma
1914 + htab
->sgot
->output_offset
1916 outrel
.r_info
= ELF32_R_INFO (0, R_386_RELATIVE
);
1917 loc
= (Elf32_External_Rel
*) srelgot
->contents
;
1918 loc
+= srelgot
->reloc_count
++;
1919 bfd_elf32_swap_reloc_out (output_bfd
, &outrel
, loc
);
1922 local_got_offsets
[r_symndx
] |= 1;
1926 if (off
>= (bfd_vma
) -2)
1929 relocation
= htab
->sgot
->output_offset
+ off
;
1933 /* Relocation is relative to the start of the global offset
1936 /* Note that sgot->output_offset is not involved in this
1937 calculation. We always want the start of .got. If we
1938 defined _GLOBAL_OFFSET_TABLE in a different way, as is
1939 permitted by the ABI, we might have to change this
1941 relocation
-= htab
->sgot
->output_section
->vma
;
1945 /* Use global offset table as symbol value. */
1946 relocation
= htab
->sgot
->output_section
->vma
;
1947 unresolved_reloc
= false;
1951 /* Relocation is to the entry for this symbol in the
1952 procedure linkage table. */
1954 /* Resolve a PLT32 reloc against a local symbol directly,
1955 without using the procedure linkage table. */
1959 if (h
->plt
.offset
== (bfd_vma
) -1
1960 || htab
->splt
== NULL
)
1962 /* We didn't make a PLT entry for this symbol. This
1963 happens when statically linking PIC code, or when
1964 using -Bsymbolic. */
1968 relocation
= (htab
->splt
->output_section
->vma
1969 + htab
->splt
->output_offset
1971 unresolved_reloc
= false;
1976 /* r_symndx will be zero only for relocs against symbols
1977 from removed linkonce sections, or sections discarded by
1980 || (input_section
->flags
& SEC_ALLOC
) == 0)
1984 && (r_type
!= R_386_PC32
1987 && (! info
->symbolic
1988 || (h
->elf_link_hash_flags
1989 & ELF_LINK_HASH_DEF_REGULAR
) == 0))))
1993 && (h
->elf_link_hash_flags
& ELF_LINK_NON_GOT_REF
) == 0
1994 && (((h
->elf_link_hash_flags
1995 & ELF_LINK_HASH_DEF_DYNAMIC
) != 0
1996 && (h
->elf_link_hash_flags
1997 & ELF_LINK_HASH_DEF_REGULAR
) == 0)
1998 || h
->root
.type
== bfd_link_hash_undefweak
1999 || h
->root
.type
== bfd_link_hash_undefined
)))
2001 Elf_Internal_Rel outrel
;
2002 boolean skip
, relocate
;
2004 Elf32_External_Rel
*loc
;
2006 /* When generating a shared object, these relocations
2007 are copied into the output file to be resolved at run
2012 if (elf_section_data (input_section
)->stab_info
== NULL
)
2013 outrel
.r_offset
= rel
->r_offset
;
2016 off
= (_bfd_stab_section_offset
2017 (output_bfd
, htab
->elf
.stab_info
, input_section
,
2018 &elf_section_data (input_section
)->stab_info
,
2020 if (off
== (bfd_vma
) -1)
2022 outrel
.r_offset
= off
;
2025 outrel
.r_offset
+= (input_section
->output_section
->vma
2026 + input_section
->output_offset
);
2030 memset (&outrel
, 0, sizeof outrel
);
2035 && (r_type
== R_386_PC32
2038 || (h
->elf_link_hash_flags
2039 & ELF_LINK_HASH_DEF_REGULAR
) == 0))
2043 outrel
.r_info
= ELF32_R_INFO (h
->dynindx
, r_type
);
2047 /* This symbol is local, or marked to become local. */
2049 outrel
.r_info
= ELF32_R_INFO (0, R_386_RELATIVE
);
2052 sreloc
= elf_section_data (input_section
)->sreloc
;
2056 loc
= (Elf32_External_Rel
*) sreloc
->contents
;
2057 loc
+= sreloc
->reloc_count
++;
2058 bfd_elf32_swap_reloc_out (output_bfd
, &outrel
, loc
);
2060 /* If this reloc is against an external symbol, we do
2061 not want to fiddle with the addend. Otherwise, we
2062 need to include the symbol value so that it becomes
2063 an addend for the dynamic reloc. */
2073 /* FIXME: Why do we allow debugging sections to escape this error?
2074 More importantly, why do we not emit dynamic relocs for
2075 R_386_32 above in debugging sections (which are ! SEC_ALLOC)?
2076 If we had emitted the dynamic reloc, we could remove the
2078 if (unresolved_reloc
2080 && (input_section
->flags
& SEC_DEBUGGING
) != 0
2081 && (h
->elf_link_hash_flags
& ELF_LINK_HASH_DEF_DYNAMIC
) != 0))
2082 (*_bfd_error_handler
)
2083 (_("%s(%s+0x%lx): unresolvable relocation against symbol `%s'"),
2084 bfd_archive_filename (input_bfd
),
2085 bfd_get_section_name (input_bfd
, input_section
),
2086 (long) rel
->r_offset
,
2087 h
->root
.root
.string
);
2089 r
= _bfd_final_link_relocate (howto
, input_bfd
, input_section
,
2090 contents
, rel
->r_offset
,
2091 relocation
, (bfd_vma
) 0);
2093 if (r
!= bfd_reloc_ok
)
2098 name
= h
->root
.root
.string
;
2101 name
= bfd_elf_string_from_elf_section (input_bfd
,
2102 symtab_hdr
->sh_link
,
2107 name
= bfd_section_name (input_bfd
, sec
);
2110 if (r
== bfd_reloc_overflow
)
2113 if (! ((*info
->callbacks
->reloc_overflow
)
2114 (info
, name
, howto
->name
, (bfd_vma
) 0,
2115 input_bfd
, input_section
, rel
->r_offset
)))
2120 (*_bfd_error_handler
)
2121 (_("%s(%s+0x%lx): reloc against `%s': error %d"),
2122 bfd_archive_filename (input_bfd
),
2123 bfd_get_section_name (input_bfd
, input_section
),
2124 (long) rel
->r_offset
, name
, (int) r
);
2133 /* Finish up dynamic symbol handling. We set the contents of various
2134 dynamic sections here. */
2137 elf_i386_finish_dynamic_symbol (output_bfd
, info
, h
, sym
)
2139 struct bfd_link_info
*info
;
2140 struct elf_link_hash_entry
*h
;
2141 Elf_Internal_Sym
*sym
;
2143 struct elf_i386_link_hash_table
*htab
;
2145 htab
= elf_i386_hash_table (info
);
2147 if (h
->plt
.offset
!= (bfd_vma
) -1)
2151 Elf_Internal_Rel rel
;
2152 Elf32_External_Rel
*loc
;
2154 /* This symbol has an entry in the procedure linkage table. Set
2157 if (h
->dynindx
== -1
2158 || htab
->splt
== NULL
2159 || htab
->sgotplt
== NULL
2160 || htab
->srelplt
== NULL
)
2163 /* Get the index in the procedure linkage table which
2164 corresponds to this symbol. This is the index of this symbol
2165 in all the symbols for which we are making plt entries. The
2166 first entry in the procedure linkage table is reserved. */
2167 plt_index
= h
->plt
.offset
/ PLT_ENTRY_SIZE
- 1;
2169 /* Get the offset into the .got table of the entry that
2170 corresponds to this function. Each .got entry is 4 bytes.
2171 The first three are reserved. */
2172 got_offset
= (plt_index
+ 3) * 4;
2174 /* Fill in the entry in the procedure linkage table. */
2177 memcpy (htab
->splt
->contents
+ h
->plt
.offset
, elf_i386_plt_entry
,
2179 bfd_put_32 (output_bfd
,
2180 (htab
->sgotplt
->output_section
->vma
2181 + htab
->sgotplt
->output_offset
2183 htab
->splt
->contents
+ h
->plt
.offset
+ 2);
2187 memcpy (htab
->splt
->contents
+ h
->plt
.offset
, elf_i386_pic_plt_entry
,
2189 bfd_put_32 (output_bfd
, got_offset
,
2190 htab
->splt
->contents
+ h
->plt
.offset
+ 2);
2193 bfd_put_32 (output_bfd
, plt_index
* sizeof (Elf32_External_Rel
),
2194 htab
->splt
->contents
+ h
->plt
.offset
+ 7);
2195 bfd_put_32 (output_bfd
, - (h
->plt
.offset
+ PLT_ENTRY_SIZE
),
2196 htab
->splt
->contents
+ h
->plt
.offset
+ 12);
2198 /* Fill in the entry in the global offset table. */
2199 bfd_put_32 (output_bfd
,
2200 (htab
->splt
->output_section
->vma
2201 + htab
->splt
->output_offset
2204 htab
->sgotplt
->contents
+ got_offset
);
2206 /* Fill in the entry in the .rel.plt section. */
2207 rel
.r_offset
= (htab
->sgotplt
->output_section
->vma
2208 + htab
->sgotplt
->output_offset
2210 rel
.r_info
= ELF32_R_INFO (h
->dynindx
, R_386_JUMP_SLOT
);
2211 loc
= (Elf32_External_Rel
*) htab
->srelplt
->contents
+ plt_index
;
2212 bfd_elf32_swap_reloc_out (output_bfd
, &rel
, loc
);
2214 if ((h
->elf_link_hash_flags
& ELF_LINK_HASH_DEF_REGULAR
) == 0)
2216 /* Mark the symbol as undefined, rather than as defined in
2217 the .plt section. Leave the value alone. This is a clue
2218 for the dynamic linker, to make function pointer
2219 comparisons work between an application and shared
2221 sym
->st_shndx
= SHN_UNDEF
;
2225 if (h
->got
.offset
!= (bfd_vma
) -1)
2227 Elf_Internal_Rel rel
;
2228 Elf32_External_Rel
*loc
;
2230 /* This symbol has an entry in the global offset table. Set it
2233 if (htab
->sgot
== NULL
|| htab
->srelgot
== NULL
)
2236 rel
.r_offset
= (htab
->sgot
->output_section
->vma
2237 + htab
->sgot
->output_offset
2238 + (h
->got
.offset
& ~(bfd_vma
) 1));
2240 /* If this is a static link, or it is a -Bsymbolic link and the
2241 symbol is defined locally or was forced to be local because
2242 of a version file, we just want to emit a RELATIVE reloc.
2243 The entry in the global offset table will already have been
2244 initialized in the relocate_section function. */
2248 || (h
->elf_link_hash_flags
& ELF_LINK_FORCED_LOCAL
))
2249 && (h
->elf_link_hash_flags
& ELF_LINK_HASH_DEF_REGULAR
))
2251 BFD_ASSERT((h
->got
.offset
& 1) != 0);
2252 rel
.r_info
= ELF32_R_INFO (0, R_386_RELATIVE
);
2256 BFD_ASSERT((h
->got
.offset
& 1) == 0);
2257 bfd_put_32 (output_bfd
, (bfd_vma
) 0,
2258 htab
->sgot
->contents
+ h
->got
.offset
);
2259 rel
.r_info
= ELF32_R_INFO (h
->dynindx
, R_386_GLOB_DAT
);
2262 loc
= (Elf32_External_Rel
*) htab
->srelgot
->contents
;
2263 loc
+= htab
->srelgot
->reloc_count
++;
2264 bfd_elf32_swap_reloc_out (output_bfd
, &rel
, loc
);
2267 if ((h
->elf_link_hash_flags
& ELF_LINK_HASH_NEEDS_COPY
) != 0)
2269 Elf_Internal_Rel rel
;
2270 Elf32_External_Rel
*loc
;
2272 /* This symbol needs a copy reloc. Set it up. */
2274 if (h
->dynindx
== -1
2275 || (h
->root
.type
!= bfd_link_hash_defined
2276 && h
->root
.type
!= bfd_link_hash_defweak
)
2277 || htab
->srelbss
== NULL
)
2280 rel
.r_offset
= (h
->root
.u
.def
.value
2281 + h
->root
.u
.def
.section
->output_section
->vma
2282 + h
->root
.u
.def
.section
->output_offset
);
2283 rel
.r_info
= ELF32_R_INFO (h
->dynindx
, R_386_COPY
);
2284 loc
= (Elf32_External_Rel
*) htab
->srelbss
->contents
;
2285 loc
+= htab
->srelbss
->reloc_count
++;
2286 bfd_elf32_swap_reloc_out (output_bfd
, &rel
, loc
);
2289 /* Mark _DYNAMIC and _GLOBAL_OFFSET_TABLE_ as absolute. */
2290 if (strcmp (h
->root
.root
.string
, "_DYNAMIC") == 0
2291 || strcmp (h
->root
.root
.string
, "_GLOBAL_OFFSET_TABLE_") == 0)
2292 sym
->st_shndx
= SHN_ABS
;
2297 /* Used to decide how to sort relocs in an optimal manner for the
2298 dynamic linker, before writing them out. */
2300 static enum elf_reloc_type_class
2301 elf_i386_reloc_type_class (rela
)
2302 const Elf_Internal_Rela
*rela
;
2304 switch ((int) ELF32_R_TYPE (rela
->r_info
))
2306 case R_386_RELATIVE
:
2307 return reloc_class_relative
;
2308 case R_386_JUMP_SLOT
:
2309 return reloc_class_plt
;
2311 return reloc_class_copy
;
2313 return reloc_class_normal
;
2317 /* Finish up the dynamic sections. */
2320 elf_i386_finish_dynamic_sections (output_bfd
, info
)
2322 struct bfd_link_info
*info
;
2324 struct elf_i386_link_hash_table
*htab
;
2328 htab
= elf_i386_hash_table (info
);
2329 dynobj
= htab
->elf
.dynobj
;
2330 sdyn
= bfd_get_section_by_name (dynobj
, ".dynamic");
2332 if (htab
->elf
.dynamic_sections_created
)
2334 Elf32_External_Dyn
*dyncon
, *dynconend
;
2336 if (sdyn
== NULL
|| htab
->sgot
== NULL
)
2339 dyncon
= (Elf32_External_Dyn
*) sdyn
->contents
;
2340 dynconend
= (Elf32_External_Dyn
*) (sdyn
->contents
+ sdyn
->_raw_size
);
2341 for (; dyncon
< dynconend
; dyncon
++)
2343 Elf_Internal_Dyn dyn
;
2346 bfd_elf32_swap_dyn_in (dynobj
, dyncon
, &dyn
);
2354 dyn
.d_un
.d_ptr
= htab
->sgot
->output_section
->vma
;
2358 dyn
.d_un
.d_ptr
= htab
->srelplt
->output_section
->vma
;
2362 s
= htab
->srelplt
->output_section
;
2363 if (s
->_cooked_size
!= 0)
2364 dyn
.d_un
.d_val
= s
->_cooked_size
;
2366 dyn
.d_un
.d_val
= s
->_raw_size
;
2370 /* My reading of the SVR4 ABI indicates that the
2371 procedure linkage table relocs (DT_JMPREL) should be
2372 included in the overall relocs (DT_REL). This is
2373 what Solaris does. However, UnixWare can not handle
2374 that case. Therefore, we override the DT_RELSZ entry
2375 here to make it not include the JMPREL relocs. Since
2376 the linker script arranges for .rel.plt to follow all
2377 other relocation sections, we don't have to worry
2378 about changing the DT_REL entry. */
2379 if (htab
->srelplt
!= NULL
)
2381 s
= htab
->srelplt
->output_section
;
2382 if (s
->_cooked_size
!= 0)
2383 dyn
.d_un
.d_val
-= s
->_cooked_size
;
2385 dyn
.d_un
.d_val
-= s
->_raw_size
;
2390 bfd_elf32_swap_dyn_out (output_bfd
, &dyn
, dyncon
);
2393 /* Fill in the first entry in the procedure linkage table. */
2394 if (htab
->splt
&& htab
->splt
->_raw_size
> 0)
2397 memcpy (htab
->splt
->contents
,
2398 elf_i386_pic_plt0_entry
, PLT_ENTRY_SIZE
);
2401 memcpy (htab
->splt
->contents
,
2402 elf_i386_plt0_entry
, PLT_ENTRY_SIZE
);
2403 bfd_put_32 (output_bfd
,
2404 (htab
->sgotplt
->output_section
->vma
2405 + htab
->sgotplt
->output_offset
2407 htab
->splt
->contents
+ 2);
2408 bfd_put_32 (output_bfd
,
2409 (htab
->sgotplt
->output_section
->vma
2410 + htab
->sgotplt
->output_offset
2412 htab
->splt
->contents
+ 8);
2415 /* UnixWare sets the entsize of .plt to 4, although that doesn't
2416 really seem like the right value. */
2417 elf_section_data (htab
->splt
->output_section
)
2418 ->this_hdr
.sh_entsize
= 4;
2424 /* Fill in the first three entries in the global offset table. */
2425 if (htab
->sgotplt
->_raw_size
> 0)
2427 bfd_put_32 (output_bfd
,
2428 (sdyn
== NULL
? (bfd_vma
) 0
2429 : sdyn
->output_section
->vma
+ sdyn
->output_offset
),
2430 htab
->sgotplt
->contents
);
2431 bfd_put_32 (output_bfd
, (bfd_vma
) 0, htab
->sgotplt
->contents
+ 4);
2432 bfd_put_32 (output_bfd
, (bfd_vma
) 0, htab
->sgotplt
->contents
+ 8);
2435 elf_section_data (htab
->sgotplt
->output_section
)->this_hdr
.sh_entsize
= 4;
2440 #define TARGET_LITTLE_SYM bfd_elf32_i386_vec
2441 #define TARGET_LITTLE_NAME "elf32-i386"
2442 #define ELF_ARCH bfd_arch_i386
2443 #define ELF_MACHINE_CODE EM_386
2444 #define ELF_MAXPAGESIZE 0x1000
2446 #define elf_backend_can_gc_sections 1
2447 #define elf_backend_can_refcount 1
2448 #define elf_backend_want_got_plt 1
2449 #define elf_backend_plt_readonly 1
2450 #define elf_backend_want_plt_sym 0
2451 #define elf_backend_got_header_size 12
2452 #define elf_backend_plt_header_size PLT_ENTRY_SIZE
2454 #define elf_info_to_howto elf_i386_info_to_howto
2455 #define elf_info_to_howto_rel elf_i386_info_to_howto_rel
2457 #define bfd_elf32_bfd_is_local_label_name elf_i386_is_local_label_name
2458 #define bfd_elf32_bfd_link_hash_table_create elf_i386_link_hash_table_create
2459 #define bfd_elf32_bfd_reloc_type_lookup elf_i386_reloc_type_lookup
2461 #define elf_backend_adjust_dynamic_symbol elf_i386_adjust_dynamic_symbol
2462 #define elf_backend_check_relocs elf_i386_check_relocs
2463 #define elf_backend_copy_indirect_symbol elf_i386_copy_indirect_symbol
2464 #define elf_backend_create_dynamic_sections elf_i386_create_dynamic_sections
2465 #define elf_backend_fake_sections elf_i386_fake_sections
2466 #define elf_backend_finish_dynamic_sections elf_i386_finish_dynamic_sections
2467 #define elf_backend_finish_dynamic_symbol elf_i386_finish_dynamic_symbol
2468 #define elf_backend_gc_mark_hook elf_i386_gc_mark_hook
2469 #define elf_backend_gc_sweep_hook elf_i386_gc_sweep_hook
2470 #define elf_backend_grok_prstatus elf_i386_grok_prstatus
2471 #define elf_backend_grok_psinfo elf_i386_grok_psinfo
2472 #define elf_backend_reloc_type_class elf_i386_reloc_type_class
2473 #define elf_backend_relocate_section elf_i386_relocate_section
2474 #define elf_backend_size_dynamic_sections elf_i386_size_dynamic_sections
2476 #include "elf32-target.h"