1 /* Intel 80386/80486-specific support for 32-bit ELF
2 Copyright 1993, 1994, 1995, 1996, 1997, 1998, 1999, 2000, 2001, 2002,
3 2003, 2004, 2005 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., 51 Franklin Street - Fifth Floor, Boston, MA 02110-1301, USA. */
26 #include "elf-vxworks.h"
28 /* 386 uses REL relocations instead of RELA. */
33 static reloc_howto_type elf_howto_table
[]=
35 HOWTO(R_386_NONE
, 0, 0, 0, FALSE
, 0, complain_overflow_bitfield
,
36 bfd_elf_generic_reloc
, "R_386_NONE",
37 TRUE
, 0x00000000, 0x00000000, FALSE
),
38 HOWTO(R_386_32
, 0, 2, 32, FALSE
, 0, complain_overflow_bitfield
,
39 bfd_elf_generic_reloc
, "R_386_32",
40 TRUE
, 0xffffffff, 0xffffffff, FALSE
),
41 HOWTO(R_386_PC32
, 0, 2, 32, TRUE
, 0, complain_overflow_bitfield
,
42 bfd_elf_generic_reloc
, "R_386_PC32",
43 TRUE
, 0xffffffff, 0xffffffff, TRUE
),
44 HOWTO(R_386_GOT32
, 0, 2, 32, FALSE
, 0, complain_overflow_bitfield
,
45 bfd_elf_generic_reloc
, "R_386_GOT32",
46 TRUE
, 0xffffffff, 0xffffffff, FALSE
),
47 HOWTO(R_386_PLT32
, 0, 2, 32, TRUE
, 0, complain_overflow_bitfield
,
48 bfd_elf_generic_reloc
, "R_386_PLT32",
49 TRUE
, 0xffffffff, 0xffffffff, TRUE
),
50 HOWTO(R_386_COPY
, 0, 2, 32, FALSE
, 0, complain_overflow_bitfield
,
51 bfd_elf_generic_reloc
, "R_386_COPY",
52 TRUE
, 0xffffffff, 0xffffffff, FALSE
),
53 HOWTO(R_386_GLOB_DAT
, 0, 2, 32, FALSE
, 0, complain_overflow_bitfield
,
54 bfd_elf_generic_reloc
, "R_386_GLOB_DAT",
55 TRUE
, 0xffffffff, 0xffffffff, FALSE
),
56 HOWTO(R_386_JUMP_SLOT
, 0, 2, 32, FALSE
, 0, complain_overflow_bitfield
,
57 bfd_elf_generic_reloc
, "R_386_JUMP_SLOT",
58 TRUE
, 0xffffffff, 0xffffffff, FALSE
),
59 HOWTO(R_386_RELATIVE
, 0, 2, 32, FALSE
, 0, complain_overflow_bitfield
,
60 bfd_elf_generic_reloc
, "R_386_RELATIVE",
61 TRUE
, 0xffffffff, 0xffffffff, FALSE
),
62 HOWTO(R_386_GOTOFF
, 0, 2, 32, FALSE
, 0, complain_overflow_bitfield
,
63 bfd_elf_generic_reloc
, "R_386_GOTOFF",
64 TRUE
, 0xffffffff, 0xffffffff, FALSE
),
65 HOWTO(R_386_GOTPC
, 0, 2, 32, TRUE
, 0, complain_overflow_bitfield
,
66 bfd_elf_generic_reloc
, "R_386_GOTPC",
67 TRUE
, 0xffffffff, 0xffffffff, TRUE
),
69 /* We have a gap in the reloc numbers here.
70 R_386_standard counts the number up to this point, and
71 R_386_ext_offset is the value to subtract from a reloc type of
72 R_386_16 thru R_386_PC8 to form an index into this table. */
73 #define R_386_standard (R_386_GOTPC + 1)
74 #define R_386_ext_offset (R_386_TLS_TPOFF - R_386_standard)
76 /* These relocs are a GNU extension. */
77 HOWTO(R_386_TLS_TPOFF
, 0, 2, 32, FALSE
, 0, complain_overflow_bitfield
,
78 bfd_elf_generic_reloc
, "R_386_TLS_TPOFF",
79 TRUE
, 0xffffffff, 0xffffffff, FALSE
),
80 HOWTO(R_386_TLS_IE
, 0, 2, 32, FALSE
, 0, complain_overflow_bitfield
,
81 bfd_elf_generic_reloc
, "R_386_TLS_IE",
82 TRUE
, 0xffffffff, 0xffffffff, FALSE
),
83 HOWTO(R_386_TLS_GOTIE
, 0, 2, 32, FALSE
, 0, complain_overflow_bitfield
,
84 bfd_elf_generic_reloc
, "R_386_TLS_GOTIE",
85 TRUE
, 0xffffffff, 0xffffffff, FALSE
),
86 HOWTO(R_386_TLS_LE
, 0, 2, 32, FALSE
, 0, complain_overflow_bitfield
,
87 bfd_elf_generic_reloc
, "R_386_TLS_LE",
88 TRUE
, 0xffffffff, 0xffffffff, FALSE
),
89 HOWTO(R_386_TLS_GD
, 0, 2, 32, FALSE
, 0, complain_overflow_bitfield
,
90 bfd_elf_generic_reloc
, "R_386_TLS_GD",
91 TRUE
, 0xffffffff, 0xffffffff, FALSE
),
92 HOWTO(R_386_TLS_LDM
, 0, 2, 32, FALSE
, 0, complain_overflow_bitfield
,
93 bfd_elf_generic_reloc
, "R_386_TLS_LDM",
94 TRUE
, 0xffffffff, 0xffffffff, FALSE
),
95 HOWTO(R_386_16
, 0, 1, 16, FALSE
, 0, complain_overflow_bitfield
,
96 bfd_elf_generic_reloc
, "R_386_16",
97 TRUE
, 0xffff, 0xffff, FALSE
),
98 HOWTO(R_386_PC16
, 0, 1, 16, TRUE
, 0, complain_overflow_bitfield
,
99 bfd_elf_generic_reloc
, "R_386_PC16",
100 TRUE
, 0xffff, 0xffff, TRUE
),
101 HOWTO(R_386_8
, 0, 0, 8, FALSE
, 0, complain_overflow_bitfield
,
102 bfd_elf_generic_reloc
, "R_386_8",
103 TRUE
, 0xff, 0xff, FALSE
),
104 HOWTO(R_386_PC8
, 0, 0, 8, TRUE
, 0, complain_overflow_signed
,
105 bfd_elf_generic_reloc
, "R_386_PC8",
106 TRUE
, 0xff, 0xff, TRUE
),
108 #define R_386_ext (R_386_PC8 + 1 - R_386_ext_offset)
109 #define R_386_tls_offset (R_386_TLS_LDO_32 - R_386_ext)
110 /* These are common with Solaris TLS implementation. */
111 HOWTO(R_386_TLS_LDO_32
, 0, 2, 32, FALSE
, 0, complain_overflow_bitfield
,
112 bfd_elf_generic_reloc
, "R_386_TLS_LDO_32",
113 TRUE
, 0xffffffff, 0xffffffff, FALSE
),
114 HOWTO(R_386_TLS_IE_32
, 0, 2, 32, FALSE
, 0, complain_overflow_bitfield
,
115 bfd_elf_generic_reloc
, "R_386_TLS_IE_32",
116 TRUE
, 0xffffffff, 0xffffffff, FALSE
),
117 HOWTO(R_386_TLS_LE_32
, 0, 2, 32, FALSE
, 0, complain_overflow_bitfield
,
118 bfd_elf_generic_reloc
, "R_386_TLS_LE_32",
119 TRUE
, 0xffffffff, 0xffffffff, FALSE
),
120 HOWTO(R_386_TLS_DTPMOD32
, 0, 2, 32, FALSE
, 0, complain_overflow_bitfield
,
121 bfd_elf_generic_reloc
, "R_386_TLS_DTPMOD32",
122 TRUE
, 0xffffffff, 0xffffffff, FALSE
),
123 HOWTO(R_386_TLS_DTPOFF32
, 0, 2, 32, FALSE
, 0, complain_overflow_bitfield
,
124 bfd_elf_generic_reloc
, "R_386_TLS_DTPOFF32",
125 TRUE
, 0xffffffff, 0xffffffff, FALSE
),
126 HOWTO(R_386_TLS_TPOFF32
, 0, 2, 32, FALSE
, 0, complain_overflow_bitfield
,
127 bfd_elf_generic_reloc
, "R_386_TLS_TPOFF32",
128 TRUE
, 0xffffffff, 0xffffffff, FALSE
),
131 #define R_386_tls (R_386_TLS_TPOFF32 + 1 - R_386_tls_offset)
132 #define R_386_vt_offset (R_386_GNU_VTINHERIT - R_386_tls)
134 /* GNU extension to record C++ vtable hierarchy. */
135 HOWTO (R_386_GNU_VTINHERIT
, /* type */
137 2, /* size (0 = byte, 1 = short, 2 = long) */
139 FALSE
, /* pc_relative */
141 complain_overflow_dont
, /* complain_on_overflow */
142 NULL
, /* special_function */
143 "R_386_GNU_VTINHERIT", /* name */
144 FALSE
, /* partial_inplace */
147 FALSE
), /* pcrel_offset */
149 /* GNU extension to record C++ vtable member usage. */
150 HOWTO (R_386_GNU_VTENTRY
, /* type */
152 2, /* size (0 = byte, 1 = short, 2 = long) */
154 FALSE
, /* pc_relative */
156 complain_overflow_dont
, /* complain_on_overflow */
157 _bfd_elf_rel_vtable_reloc_fn
, /* special_function */
158 "R_386_GNU_VTENTRY", /* name */
159 FALSE
, /* partial_inplace */
162 FALSE
) /* pcrel_offset */
164 #define R_386_vt (R_386_GNU_VTENTRY + 1 - R_386_vt_offset)
168 #ifdef DEBUG_GEN_RELOC
170 fprintf (stderr, "i386 bfd reloc lookup %d (%s)\n", code, str)
175 static reloc_howto_type
*
176 elf_i386_reloc_type_lookup (bfd
*abfd ATTRIBUTE_UNUSED
,
177 bfd_reloc_code_real_type code
)
182 TRACE ("BFD_RELOC_NONE");
183 return &elf_howto_table
[R_386_NONE
];
186 TRACE ("BFD_RELOC_32");
187 return &elf_howto_table
[R_386_32
];
190 TRACE ("BFD_RELOC_CTOR");
191 return &elf_howto_table
[R_386_32
];
193 case BFD_RELOC_32_PCREL
:
194 TRACE ("BFD_RELOC_PC32");
195 return &elf_howto_table
[R_386_PC32
];
197 case BFD_RELOC_386_GOT32
:
198 TRACE ("BFD_RELOC_386_GOT32");
199 return &elf_howto_table
[R_386_GOT32
];
201 case BFD_RELOC_386_PLT32
:
202 TRACE ("BFD_RELOC_386_PLT32");
203 return &elf_howto_table
[R_386_PLT32
];
205 case BFD_RELOC_386_COPY
:
206 TRACE ("BFD_RELOC_386_COPY");
207 return &elf_howto_table
[R_386_COPY
];
209 case BFD_RELOC_386_GLOB_DAT
:
210 TRACE ("BFD_RELOC_386_GLOB_DAT");
211 return &elf_howto_table
[R_386_GLOB_DAT
];
213 case BFD_RELOC_386_JUMP_SLOT
:
214 TRACE ("BFD_RELOC_386_JUMP_SLOT");
215 return &elf_howto_table
[R_386_JUMP_SLOT
];
217 case BFD_RELOC_386_RELATIVE
:
218 TRACE ("BFD_RELOC_386_RELATIVE");
219 return &elf_howto_table
[R_386_RELATIVE
];
221 case BFD_RELOC_386_GOTOFF
:
222 TRACE ("BFD_RELOC_386_GOTOFF");
223 return &elf_howto_table
[R_386_GOTOFF
];
225 case BFD_RELOC_386_GOTPC
:
226 TRACE ("BFD_RELOC_386_GOTPC");
227 return &elf_howto_table
[R_386_GOTPC
];
229 /* These relocs are a GNU extension. */
230 case BFD_RELOC_386_TLS_TPOFF
:
231 TRACE ("BFD_RELOC_386_TLS_TPOFF");
232 return &elf_howto_table
[R_386_TLS_TPOFF
- R_386_ext_offset
];
234 case BFD_RELOC_386_TLS_IE
:
235 TRACE ("BFD_RELOC_386_TLS_IE");
236 return &elf_howto_table
[R_386_TLS_IE
- R_386_ext_offset
];
238 case BFD_RELOC_386_TLS_GOTIE
:
239 TRACE ("BFD_RELOC_386_TLS_GOTIE");
240 return &elf_howto_table
[R_386_TLS_GOTIE
- R_386_ext_offset
];
242 case BFD_RELOC_386_TLS_LE
:
243 TRACE ("BFD_RELOC_386_TLS_LE");
244 return &elf_howto_table
[R_386_TLS_LE
- R_386_ext_offset
];
246 case BFD_RELOC_386_TLS_GD
:
247 TRACE ("BFD_RELOC_386_TLS_GD");
248 return &elf_howto_table
[R_386_TLS_GD
- R_386_ext_offset
];
250 case BFD_RELOC_386_TLS_LDM
:
251 TRACE ("BFD_RELOC_386_TLS_LDM");
252 return &elf_howto_table
[R_386_TLS_LDM
- R_386_ext_offset
];
255 TRACE ("BFD_RELOC_16");
256 return &elf_howto_table
[R_386_16
- R_386_ext_offset
];
258 case BFD_RELOC_16_PCREL
:
259 TRACE ("BFD_RELOC_16_PCREL");
260 return &elf_howto_table
[R_386_PC16
- R_386_ext_offset
];
263 TRACE ("BFD_RELOC_8");
264 return &elf_howto_table
[R_386_8
- R_386_ext_offset
];
266 case BFD_RELOC_8_PCREL
:
267 TRACE ("BFD_RELOC_8_PCREL");
268 return &elf_howto_table
[R_386_PC8
- R_386_ext_offset
];
270 /* Common with Sun TLS implementation. */
271 case BFD_RELOC_386_TLS_LDO_32
:
272 TRACE ("BFD_RELOC_386_TLS_LDO_32");
273 return &elf_howto_table
[R_386_TLS_LDO_32
- R_386_tls_offset
];
275 case BFD_RELOC_386_TLS_IE_32
:
276 TRACE ("BFD_RELOC_386_TLS_IE_32");
277 return &elf_howto_table
[R_386_TLS_IE_32
- R_386_tls_offset
];
279 case BFD_RELOC_386_TLS_LE_32
:
280 TRACE ("BFD_RELOC_386_TLS_LE_32");
281 return &elf_howto_table
[R_386_TLS_LE_32
- R_386_tls_offset
];
283 case BFD_RELOC_386_TLS_DTPMOD32
:
284 TRACE ("BFD_RELOC_386_TLS_DTPMOD32");
285 return &elf_howto_table
[R_386_TLS_DTPMOD32
- R_386_tls_offset
];
287 case BFD_RELOC_386_TLS_DTPOFF32
:
288 TRACE ("BFD_RELOC_386_TLS_DTPOFF32");
289 return &elf_howto_table
[R_386_TLS_DTPOFF32
- R_386_tls_offset
];
291 case BFD_RELOC_386_TLS_TPOFF32
:
292 TRACE ("BFD_RELOC_386_TLS_TPOFF32");
293 return &elf_howto_table
[R_386_TLS_TPOFF32
- R_386_tls_offset
];
295 case BFD_RELOC_VTABLE_INHERIT
:
296 TRACE ("BFD_RELOC_VTABLE_INHERIT");
297 return &elf_howto_table
[R_386_GNU_VTINHERIT
- R_386_vt_offset
];
299 case BFD_RELOC_VTABLE_ENTRY
:
300 TRACE ("BFD_RELOC_VTABLE_ENTRY");
301 return &elf_howto_table
[R_386_GNU_VTENTRY
- R_386_vt_offset
];
312 elf_i386_info_to_howto_rel (bfd
*abfd ATTRIBUTE_UNUSED
,
314 Elf_Internal_Rela
*dst
)
316 unsigned int r_type
= ELF32_R_TYPE (dst
->r_info
);
319 if ((indx
= r_type
) >= R_386_standard
320 && ((indx
= r_type
- R_386_ext_offset
) - R_386_standard
321 >= R_386_ext
- R_386_standard
)
322 && ((indx
= r_type
- R_386_tls_offset
) - R_386_ext
323 >= R_386_tls
- R_386_ext
)
324 && ((indx
= r_type
- R_386_vt_offset
) - R_386_tls
325 >= R_386_vt
- R_386_tls
))
327 (*_bfd_error_handler
) (_("%B: invalid relocation type %d"),
331 cache_ptr
->howto
= &elf_howto_table
[indx
];
334 /* Return whether a symbol name implies a local label. The UnixWare
335 2.1 cc generates temporary symbols that start with .X, so we
336 recognize them here. FIXME: do other SVR4 compilers also use .X?.
337 If so, we should move the .X recognition into
338 _bfd_elf_is_local_label_name. */
341 elf_i386_is_local_label_name (bfd
*abfd
, const char *name
)
343 if (name
[0] == '.' && name
[1] == 'X')
346 return _bfd_elf_is_local_label_name (abfd
, name
);
349 /* Support for core dump NOTE sections. */
352 elf_i386_grok_prstatus (bfd
*abfd
, Elf_Internal_Note
*note
)
357 if (note
->namesz
== 8 && strcmp (note
->namedata
, "FreeBSD") == 0)
359 int pr_version
= bfd_get_32 (abfd
, note
->descdata
);
365 elf_tdata (abfd
)->core_signal
= bfd_get_32 (abfd
, note
->descdata
+ 20);
368 elf_tdata (abfd
)->core_pid
= bfd_get_32 (abfd
, note
->descdata
+ 24);
372 size
= bfd_get_32 (abfd
, note
->descdata
+ 8);
376 switch (note
->descsz
)
381 case 144: /* Linux/i386 */
383 elf_tdata (abfd
)->core_signal
= bfd_get_16 (abfd
, note
->descdata
+ 12);
386 elf_tdata (abfd
)->core_pid
= bfd_get_32 (abfd
, note
->descdata
+ 24);
396 /* Make a ".reg/999" section. */
397 return _bfd_elfcore_make_pseudosection (abfd
, ".reg",
398 size
, note
->descpos
+ offset
);
402 elf_i386_grok_psinfo (bfd
*abfd
, Elf_Internal_Note
*note
)
404 if (note
->namesz
== 8 && strcmp (note
->namedata
, "FreeBSD") == 0)
406 int pr_version
= bfd_get_32 (abfd
, note
->descdata
);
411 elf_tdata (abfd
)->core_program
412 = _bfd_elfcore_strndup (abfd
, note
->descdata
+ 8, 17);
413 elf_tdata (abfd
)->core_command
414 = _bfd_elfcore_strndup (abfd
, note
->descdata
+ 25, 81);
418 switch (note
->descsz
)
423 case 124: /* Linux/i386 elf_prpsinfo. */
424 elf_tdata (abfd
)->core_program
425 = _bfd_elfcore_strndup (abfd
, note
->descdata
+ 28, 16);
426 elf_tdata (abfd
)->core_command
427 = _bfd_elfcore_strndup (abfd
, note
->descdata
+ 44, 80);
431 /* Note that for some reason, a spurious space is tacked
432 onto the end of the args in some (at least one anyway)
433 implementations, so strip it off if it exists. */
435 char *command
= elf_tdata (abfd
)->core_command
;
436 int n
= strlen (command
);
438 if (0 < n
&& command
[n
- 1] == ' ')
439 command
[n
- 1] = '\0';
445 /* Functions for the i386 ELF linker.
447 In order to gain some understanding of code in this file without
448 knowing all the intricate details of the linker, note the
451 Functions named elf_i386_* are called by external routines, other
452 functions are only called locally. elf_i386_* functions appear
453 in this file more or less in the order in which they are called
454 from external routines. eg. elf_i386_check_relocs is called
455 early in the link process, elf_i386_finish_dynamic_sections is
456 one of the last functions. */
459 /* The name of the dynamic interpreter. This is put in the .interp
462 #define ELF_DYNAMIC_INTERPRETER "/usr/lib/libc.so.1"
464 /* If ELIMINATE_COPY_RELOCS is non-zero, the linker will try to avoid
465 copying dynamic variables from a shared lib into an app's dynbss
466 section, and instead use a dynamic relocation to point into the
468 #define ELIMINATE_COPY_RELOCS 1
470 /* The size in bytes of an entry in the procedure linkage table. */
472 #define PLT_ENTRY_SIZE 16
474 /* The first entry in an absolute procedure linkage table looks like
475 this. See the SVR4 ABI i386 supplement to see how this works.
476 Will be padded to PLT_ENTRY_SIZE with htab->plt0_pad_byte. */
478 static const bfd_byte elf_i386_plt0_entry
[12] =
480 0xff, 0x35, /* pushl contents of address */
481 0, 0, 0, 0, /* replaced with address of .got + 4. */
482 0xff, 0x25, /* jmp indirect */
483 0, 0, 0, 0 /* replaced with address of .got + 8. */
486 /* Subsequent entries in an absolute procedure linkage table look like
489 static const bfd_byte elf_i386_plt_entry
[PLT_ENTRY_SIZE
] =
491 0xff, 0x25, /* jmp indirect */
492 0, 0, 0, 0, /* replaced with address of this symbol in .got. */
493 0x68, /* pushl immediate */
494 0, 0, 0, 0, /* replaced with offset into relocation table. */
495 0xe9, /* jmp relative */
496 0, 0, 0, 0 /* replaced with offset to start of .plt. */
499 /* The first entry in a PIC procedure linkage table look like this.
500 Will be padded to PLT_ENTRY_SIZE with htab->plt0_pad_byte. */
502 static const bfd_byte elf_i386_pic_plt0_entry
[12] =
504 0xff, 0xb3, 4, 0, 0, 0, /* pushl 4(%ebx) */
505 0xff, 0xa3, 8, 0, 0, 0 /* jmp *8(%ebx) */
508 /* Subsequent entries in a PIC procedure linkage table look like this. */
510 static const bfd_byte elf_i386_pic_plt_entry
[PLT_ENTRY_SIZE
] =
512 0xff, 0xa3, /* jmp *offset(%ebx) */
513 0, 0, 0, 0, /* replaced with offset of this symbol in .got. */
514 0x68, /* pushl immediate */
515 0, 0, 0, 0, /* replaced with offset into relocation table. */
516 0xe9, /* jmp relative */
517 0, 0, 0, 0 /* replaced with offset to start of .plt. */
520 /* On VxWorks, the .rel.plt.unloaded section has absolute relocations
521 for the PLTResolve stub and then for each PLT entry. */
522 #define PLTRESOLVE_RELOCS_SHLIB 0
523 #define PLTRESOLVE_RELOCS 2
524 #define PLT_NON_JUMP_SLOT_RELOCS 2
526 /* The i386 linker needs to keep track of the number of relocs that it
527 decides to copy as dynamic relocs in check_relocs for each symbol.
528 This is so that it can later discard them if they are found to be
529 unnecessary. We store the information in a field extending the
530 regular ELF linker hash table. */
532 struct elf_i386_dyn_relocs
534 struct elf_i386_dyn_relocs
*next
;
536 /* The input section of the reloc. */
539 /* Total number of relocs copied for the input section. */
542 /* Number of pc-relative relocs copied for the input section. */
543 bfd_size_type pc_count
;
546 /* i386 ELF linker hash entry. */
548 struct elf_i386_link_hash_entry
550 struct elf_link_hash_entry elf
;
552 /* Track dynamic relocs copied for this symbol. */
553 struct elf_i386_dyn_relocs
*dyn_relocs
;
555 #define GOT_UNKNOWN 0
559 #define GOT_TLS_IE_POS 5
560 #define GOT_TLS_IE_NEG 6
561 #define GOT_TLS_IE_BOTH 7
562 unsigned char tls_type
;
565 #define elf_i386_hash_entry(ent) ((struct elf_i386_link_hash_entry *)(ent))
567 struct elf_i386_obj_tdata
569 struct elf_obj_tdata root
;
571 /* tls_type for each local got entry. */
572 char *local_got_tls_type
;
575 #define elf_i386_tdata(abfd) \
576 ((struct elf_i386_obj_tdata *) (abfd)->tdata.any)
578 #define elf_i386_local_got_tls_type(abfd) \
579 (elf_i386_tdata (abfd)->local_got_tls_type)
582 elf_i386_mkobject (bfd
*abfd
)
584 bfd_size_type amt
= sizeof (struct elf_i386_obj_tdata
);
585 abfd
->tdata
.any
= bfd_zalloc (abfd
, amt
);
586 if (abfd
->tdata
.any
== NULL
)
591 /* i386 ELF linker hash table. */
593 struct elf_i386_link_hash_table
595 struct elf_link_hash_table elf
;
597 /* Short-cuts to get to dynamic linker sections. */
606 /* The (unloaded but important) .rel.plt.unloaded section on VxWorks. */
609 /* Short-cuts to frequently used symbols for VxWorks targets. */
610 struct elf_link_hash_entry
*hgot
, *hplt
;
612 /* True if the target system is VxWorks. */
615 /* Value used to fill the last word of the first plt entry. */
616 bfd_byte plt0_pad_byte
;
619 bfd_signed_vma refcount
;
623 /* Small local sym to section mapping cache. */
624 struct sym_sec_cache sym_sec
;
627 /* Get the i386 ELF linker hash table from a link_info structure. */
629 #define elf_i386_hash_table(p) \
630 ((struct elf_i386_link_hash_table *) ((p)->hash))
632 /* Create an entry in an i386 ELF linker hash table. */
634 static struct bfd_hash_entry
*
635 link_hash_newfunc (struct bfd_hash_entry
*entry
,
636 struct bfd_hash_table
*table
,
639 /* Allocate the structure if it has not already been allocated by a
643 entry
= bfd_hash_allocate (table
,
644 sizeof (struct elf_i386_link_hash_entry
));
649 /* Call the allocation method of the superclass. */
650 entry
= _bfd_elf_link_hash_newfunc (entry
, table
, string
);
653 struct elf_i386_link_hash_entry
*eh
;
655 eh
= (struct elf_i386_link_hash_entry
*) entry
;
656 eh
->dyn_relocs
= NULL
;
657 eh
->tls_type
= GOT_UNKNOWN
;
663 /* Create an i386 ELF linker hash table. */
665 static struct bfd_link_hash_table
*
666 elf_i386_link_hash_table_create (bfd
*abfd
)
668 struct elf_i386_link_hash_table
*ret
;
669 bfd_size_type amt
= sizeof (struct elf_i386_link_hash_table
);
671 ret
= bfd_malloc (amt
);
675 if (! _bfd_elf_link_hash_table_init (&ret
->elf
, abfd
, link_hash_newfunc
))
688 ret
->tls_ldm_got
.refcount
= 0;
689 ret
->sym_sec
.abfd
= NULL
;
691 ret
->srelplt2
= NULL
;
694 ret
->plt0_pad_byte
= 0;
696 return &ret
->elf
.root
;
699 /* Create .got, .gotplt, and .rel.got sections in DYNOBJ, and set up
700 shortcuts to them in our hash table. */
703 create_got_section (bfd
*dynobj
, struct bfd_link_info
*info
)
705 struct elf_i386_link_hash_table
*htab
;
707 if (! _bfd_elf_create_got_section (dynobj
, info
))
710 htab
= elf_i386_hash_table (info
);
711 htab
->sgot
= bfd_get_section_by_name (dynobj
, ".got");
712 htab
->sgotplt
= bfd_get_section_by_name (dynobj
, ".got.plt");
713 if (!htab
->sgot
|| !htab
->sgotplt
)
716 htab
->srelgot
= bfd_make_section_with_flags (dynobj
, ".rel.got",
717 (SEC_ALLOC
| SEC_LOAD
722 if (htab
->srelgot
== NULL
723 || ! bfd_set_section_alignment (dynobj
, htab
->srelgot
, 2))
728 /* Create .plt, .rel.plt, .got, .got.plt, .rel.got, .dynbss, and
729 .rel.bss sections in DYNOBJ, and set up shortcuts to them in our
733 elf_i386_create_dynamic_sections (bfd
*dynobj
, struct bfd_link_info
*info
)
735 struct elf_i386_link_hash_table
*htab
;
738 const struct elf_backend_data
*bed
= get_elf_backend_data (dynobj
);
740 htab
= elf_i386_hash_table (info
);
741 if (!htab
->sgot
&& !create_got_section (dynobj
, info
))
744 if (!_bfd_elf_create_dynamic_sections (dynobj
, info
))
747 htab
->splt
= bfd_get_section_by_name (dynobj
, ".plt");
748 htab
->srelplt
= bfd_get_section_by_name (dynobj
, ".rel.plt");
749 htab
->sdynbss
= bfd_get_section_by_name (dynobj
, ".dynbss");
751 htab
->srelbss
= bfd_get_section_by_name (dynobj
, ".rel.bss");
753 if (!htab
->splt
|| !htab
->srelplt
|| !htab
->sdynbss
754 || (!info
->shared
&& !htab
->srelbss
))
757 if (htab
->is_vxworks
&& !info
->shared
)
759 s
= bfd_make_section (dynobj
, ".rel.plt.unloaded");
760 flags
= (SEC_HAS_CONTENTS
| SEC_IN_MEMORY
| SEC_READONLY
761 | SEC_LINKER_CREATED
);
763 || ! bfd_set_section_flags (dynobj
, s
, flags
)
764 || ! bfd_set_section_alignment (dynobj
, s
, bed
->s
->log_file_align
))
772 /* Copy the extra info we tack onto an elf_link_hash_entry. */
775 elf_i386_copy_indirect_symbol (const struct elf_backend_data
*bed
,
776 struct elf_link_hash_entry
*dir
,
777 struct elf_link_hash_entry
*ind
)
779 struct elf_i386_link_hash_entry
*edir
, *eind
;
781 edir
= (struct elf_i386_link_hash_entry
*) dir
;
782 eind
= (struct elf_i386_link_hash_entry
*) ind
;
784 if (eind
->dyn_relocs
!= NULL
)
786 if (edir
->dyn_relocs
!= NULL
)
788 struct elf_i386_dyn_relocs
**pp
;
789 struct elf_i386_dyn_relocs
*p
;
791 if (ind
->root
.type
== bfd_link_hash_indirect
)
794 /* Add reloc counts against the weak sym to the strong sym
795 list. Merge any entries against the same section. */
796 for (pp
= &eind
->dyn_relocs
; (p
= *pp
) != NULL
; )
798 struct elf_i386_dyn_relocs
*q
;
800 for (q
= edir
->dyn_relocs
; q
!= NULL
; q
= q
->next
)
801 if (q
->sec
== p
->sec
)
803 q
->pc_count
+= p
->pc_count
;
804 q
->count
+= p
->count
;
811 *pp
= edir
->dyn_relocs
;
814 edir
->dyn_relocs
= eind
->dyn_relocs
;
815 eind
->dyn_relocs
= NULL
;
818 if (ind
->root
.type
== bfd_link_hash_indirect
819 && dir
->got
.refcount
<= 0)
821 edir
->tls_type
= eind
->tls_type
;
822 eind
->tls_type
= GOT_UNKNOWN
;
825 if (ELIMINATE_COPY_RELOCS
826 && ind
->root
.type
!= bfd_link_hash_indirect
827 && dir
->dynamic_adjusted
)
829 /* If called to transfer flags for a weakdef during processing
830 of elf_adjust_dynamic_symbol, don't copy non_got_ref.
831 We clear it ourselves for ELIMINATE_COPY_RELOCS. */
832 dir
->ref_dynamic
|= ind
->ref_dynamic
;
833 dir
->ref_regular
|= ind
->ref_regular
;
834 dir
->ref_regular_nonweak
|= ind
->ref_regular_nonweak
;
835 dir
->needs_plt
|= ind
->needs_plt
;
836 dir
->pointer_equality_needed
|= ind
->pointer_equality_needed
;
839 _bfd_elf_link_hash_copy_indirect (bed
, dir
, ind
);
843 elf_i386_tls_transition (struct bfd_link_info
*info
, int r_type
, int is_local
)
851 case R_386_TLS_IE_32
:
853 return R_386_TLS_LE_32
;
854 return R_386_TLS_IE_32
;
856 case R_386_TLS_GOTIE
:
858 return R_386_TLS_LE_32
;
861 return R_386_TLS_LE_32
;
867 /* Look through the relocs for a section during the first phase, and
868 calculate needed space in the global offset table, procedure linkage
869 table, and dynamic reloc sections. */
872 elf_i386_check_relocs (bfd
*abfd
,
873 struct bfd_link_info
*info
,
875 const Elf_Internal_Rela
*relocs
)
877 struct elf_i386_link_hash_table
*htab
;
878 Elf_Internal_Shdr
*symtab_hdr
;
879 struct elf_link_hash_entry
**sym_hashes
;
880 const Elf_Internal_Rela
*rel
;
881 const Elf_Internal_Rela
*rel_end
;
884 if (info
->relocatable
)
887 htab
= elf_i386_hash_table (info
);
888 symtab_hdr
= &elf_tdata (abfd
)->symtab_hdr
;
889 sym_hashes
= elf_sym_hashes (abfd
);
893 rel_end
= relocs
+ sec
->reloc_count
;
894 for (rel
= relocs
; rel
< rel_end
; rel
++)
897 unsigned long r_symndx
;
898 struct elf_link_hash_entry
*h
;
900 r_symndx
= ELF32_R_SYM (rel
->r_info
);
901 r_type
= ELF32_R_TYPE (rel
->r_info
);
903 if (r_symndx
>= NUM_SHDR_ENTRIES (symtab_hdr
))
905 (*_bfd_error_handler
) (_("%B: bad symbol index: %d"),
911 if (r_symndx
< symtab_hdr
->sh_info
)
915 h
= sym_hashes
[r_symndx
- symtab_hdr
->sh_info
];
916 while (h
->root
.type
== bfd_link_hash_indirect
917 || h
->root
.type
== bfd_link_hash_warning
)
918 h
= (struct elf_link_hash_entry
*) h
->root
.u
.i
.link
;
921 r_type
= elf_i386_tls_transition (info
, r_type
, h
== NULL
);
926 htab
->tls_ldm_got
.refcount
+= 1;
930 /* This symbol requires a procedure linkage table entry. We
931 actually build the entry in adjust_dynamic_symbol,
932 because this might be a case of linking PIC code which is
933 never referenced by a dynamic object, in which case we
934 don't need to generate a procedure linkage table entry
937 /* If this is a local symbol, we resolve it directly without
938 creating a procedure linkage table entry. */
943 h
->plt
.refcount
+= 1;
946 case R_386_TLS_IE_32
:
948 case R_386_TLS_GOTIE
:
950 info
->flags
|= DF_STATIC_TLS
;
955 /* This symbol requires a global offset table entry. */
957 int tls_type
, old_tls_type
;
962 case R_386_GOT32
: tls_type
= GOT_NORMAL
; break;
963 case R_386_TLS_GD
: tls_type
= GOT_TLS_GD
; break;
964 case R_386_TLS_IE_32
:
965 if (ELF32_R_TYPE (rel
->r_info
) == r_type
)
966 tls_type
= GOT_TLS_IE_NEG
;
968 /* If this is a GD->IE transition, we may use either of
969 R_386_TLS_TPOFF and R_386_TLS_TPOFF32. */
970 tls_type
= GOT_TLS_IE
;
973 case R_386_TLS_GOTIE
:
974 tls_type
= GOT_TLS_IE_POS
; break;
979 h
->got
.refcount
+= 1;
980 old_tls_type
= elf_i386_hash_entry(h
)->tls_type
;
984 bfd_signed_vma
*local_got_refcounts
;
986 /* This is a global offset table entry for a local symbol. */
987 local_got_refcounts
= elf_local_got_refcounts (abfd
);
988 if (local_got_refcounts
== NULL
)
992 size
= symtab_hdr
->sh_info
;
993 size
*= (sizeof (bfd_signed_vma
) + sizeof(char));
994 local_got_refcounts
= bfd_zalloc (abfd
, size
);
995 if (local_got_refcounts
== NULL
)
997 elf_local_got_refcounts (abfd
) = local_got_refcounts
;
998 elf_i386_local_got_tls_type (abfd
)
999 = (char *) (local_got_refcounts
+ symtab_hdr
->sh_info
);
1001 local_got_refcounts
[r_symndx
] += 1;
1002 old_tls_type
= elf_i386_local_got_tls_type (abfd
) [r_symndx
];
1005 if ((old_tls_type
& GOT_TLS_IE
) && (tls_type
& GOT_TLS_IE
))
1006 tls_type
|= old_tls_type
;
1007 /* If a TLS symbol is accessed using IE at least once,
1008 there is no point to use dynamic model for it. */
1009 else if (old_tls_type
!= tls_type
&& old_tls_type
!= GOT_UNKNOWN
1010 && (old_tls_type
!= GOT_TLS_GD
1011 || (tls_type
& GOT_TLS_IE
) == 0))
1013 if ((old_tls_type
& GOT_TLS_IE
) && tls_type
== GOT_TLS_GD
)
1014 tls_type
= old_tls_type
;
1017 (*_bfd_error_handler
)
1018 (_("%B: `%s' accessed both as normal and "
1019 "thread local symbol"),
1021 h
? h
->root
.root
.string
: "<local>");
1026 if (old_tls_type
!= tls_type
)
1029 elf_i386_hash_entry (h
)->tls_type
= tls_type
;
1031 elf_i386_local_got_tls_type (abfd
) [r_symndx
] = tls_type
;
1039 if (htab
->sgot
== NULL
)
1041 if (htab
->elf
.dynobj
== NULL
)
1042 htab
->elf
.dynobj
= abfd
;
1043 if (!create_got_section (htab
->elf
.dynobj
, info
))
1046 if (r_type
!= R_386_TLS_IE
)
1050 case R_386_TLS_LE_32
:
1054 info
->flags
|= DF_STATIC_TLS
;
1059 if (h
!= NULL
&& !info
->shared
)
1061 /* If this reloc is in a read-only section, we might
1062 need a copy reloc. We can't check reliably at this
1063 stage whether the section is read-only, as input
1064 sections have not yet been mapped to output sections.
1065 Tentatively set the flag for now, and correct in
1066 adjust_dynamic_symbol. */
1069 /* We may need a .plt entry if the function this reloc
1070 refers to is in a shared lib. */
1071 h
->plt
.refcount
+= 1;
1072 if (r_type
!= R_386_PC32
)
1073 h
->pointer_equality_needed
= 1;
1076 /* If we are creating a shared library, and this is a reloc
1077 against a global symbol, or a non PC relative reloc
1078 against a local symbol, then we need to copy the reloc
1079 into the shared library. However, if we are linking with
1080 -Bsymbolic, we do not need to copy a reloc against a
1081 global symbol which is defined in an object we are
1082 including in the link (i.e., DEF_REGULAR is set). At
1083 this point we have not seen all the input files, so it is
1084 possible that DEF_REGULAR is not set now but will be set
1085 later (it is never cleared). In case of a weak definition,
1086 DEF_REGULAR may be cleared later by a strong definition in
1087 a shared library. We account for that possibility below by
1088 storing information in the relocs_copied field of the hash
1089 table entry. A similar situation occurs when creating
1090 shared libraries and symbol visibility changes render the
1093 If on the other hand, we are creating an executable, we
1094 may need to keep relocations for symbols satisfied by a
1095 dynamic library if we manage to avoid copy relocs for the
1098 && (sec
->flags
& SEC_ALLOC
) != 0
1099 && (r_type
!= R_386_PC32
1101 && (! info
->symbolic
1102 || h
->root
.type
== bfd_link_hash_defweak
1103 || !h
->def_regular
))))
1104 || (ELIMINATE_COPY_RELOCS
1106 && (sec
->flags
& SEC_ALLOC
) != 0
1108 && (h
->root
.type
== bfd_link_hash_defweak
1109 || !h
->def_regular
)))
1111 struct elf_i386_dyn_relocs
*p
;
1112 struct elf_i386_dyn_relocs
**head
;
1114 /* We must copy these reloc types into the output file.
1115 Create a reloc section in dynobj and make room for
1121 unsigned int strndx
= elf_elfheader (abfd
)->e_shstrndx
;
1122 unsigned int shnam
= elf_section_data (sec
)->rel_hdr
.sh_name
;
1124 name
= bfd_elf_string_from_elf_section (abfd
, strndx
, shnam
);
1128 if (strncmp (name
, ".rel", 4) != 0
1129 || strcmp (bfd_get_section_name (abfd
, sec
),
1132 (*_bfd_error_handler
)
1133 (_("%B: bad relocation section name `%s\'"),
1137 if (htab
->elf
.dynobj
== NULL
)
1138 htab
->elf
.dynobj
= abfd
;
1140 dynobj
= htab
->elf
.dynobj
;
1141 sreloc
= bfd_get_section_by_name (dynobj
, name
);
1146 flags
= (SEC_HAS_CONTENTS
| SEC_READONLY
1147 | SEC_IN_MEMORY
| SEC_LINKER_CREATED
);
1148 if ((sec
->flags
& SEC_ALLOC
) != 0)
1149 flags
|= SEC_ALLOC
| SEC_LOAD
;
1150 sreloc
= bfd_make_section_with_flags (dynobj
,
1154 || ! bfd_set_section_alignment (dynobj
, sreloc
, 2))
1157 elf_section_data (sec
)->sreloc
= sreloc
;
1160 /* If this is a global symbol, we count the number of
1161 relocations we need for this symbol. */
1164 head
= &((struct elf_i386_link_hash_entry
*) h
)->dyn_relocs
;
1168 /* Track dynamic relocs needed for local syms too.
1169 We really need local syms available to do this
1173 s
= bfd_section_from_r_symndx (abfd
, &htab
->sym_sec
,
1178 head
= ((struct elf_i386_dyn_relocs
**)
1179 &elf_section_data (s
)->local_dynrel
);
1183 if (p
== NULL
|| p
->sec
!= sec
)
1185 bfd_size_type amt
= sizeof *p
;
1186 p
= bfd_alloc (htab
->elf
.dynobj
, amt
);
1197 if (r_type
== R_386_PC32
)
1202 /* This relocation describes the C++ object vtable hierarchy.
1203 Reconstruct it for later use during GC. */
1204 case R_386_GNU_VTINHERIT
:
1205 if (!bfd_elf_gc_record_vtinherit (abfd
, sec
, h
, rel
->r_offset
))
1209 /* This relocation describes which C++ vtable entries are actually
1210 used. Record for later use during GC. */
1211 case R_386_GNU_VTENTRY
:
1212 if (!bfd_elf_gc_record_vtentry (abfd
, sec
, h
, rel
->r_offset
))
1224 /* Return the section that should be marked against GC for a given
1228 elf_i386_gc_mark_hook (asection
*sec
,
1229 struct bfd_link_info
*info ATTRIBUTE_UNUSED
,
1230 Elf_Internal_Rela
*rel
,
1231 struct elf_link_hash_entry
*h
,
1232 Elf_Internal_Sym
*sym
)
1236 switch (ELF32_R_TYPE (rel
->r_info
))
1238 case R_386_GNU_VTINHERIT
:
1239 case R_386_GNU_VTENTRY
:
1243 switch (h
->root
.type
)
1245 case bfd_link_hash_defined
:
1246 case bfd_link_hash_defweak
:
1247 return h
->root
.u
.def
.section
;
1249 case bfd_link_hash_common
:
1250 return h
->root
.u
.c
.p
->section
;
1258 return bfd_section_from_elf_index (sec
->owner
, sym
->st_shndx
);
1263 /* Update the got entry reference counts for the section being removed. */
1266 elf_i386_gc_sweep_hook (bfd
*abfd
,
1267 struct bfd_link_info
*info
,
1269 const Elf_Internal_Rela
*relocs
)
1271 Elf_Internal_Shdr
*symtab_hdr
;
1272 struct elf_link_hash_entry
**sym_hashes
;
1273 bfd_signed_vma
*local_got_refcounts
;
1274 const Elf_Internal_Rela
*rel
, *relend
;
1276 elf_section_data (sec
)->local_dynrel
= NULL
;
1278 symtab_hdr
= &elf_tdata (abfd
)->symtab_hdr
;
1279 sym_hashes
= elf_sym_hashes (abfd
);
1280 local_got_refcounts
= elf_local_got_refcounts (abfd
);
1282 relend
= relocs
+ sec
->reloc_count
;
1283 for (rel
= relocs
; rel
< relend
; rel
++)
1285 unsigned long r_symndx
;
1286 unsigned int r_type
;
1287 struct elf_link_hash_entry
*h
= NULL
;
1289 r_symndx
= ELF32_R_SYM (rel
->r_info
);
1290 if (r_symndx
>= symtab_hdr
->sh_info
)
1292 struct elf_i386_link_hash_entry
*eh
;
1293 struct elf_i386_dyn_relocs
**pp
;
1294 struct elf_i386_dyn_relocs
*p
;
1296 h
= sym_hashes
[r_symndx
- symtab_hdr
->sh_info
];
1297 while (h
->root
.type
== bfd_link_hash_indirect
1298 || h
->root
.type
== bfd_link_hash_warning
)
1299 h
= (struct elf_link_hash_entry
*) h
->root
.u
.i
.link
;
1300 eh
= (struct elf_i386_link_hash_entry
*) h
;
1302 for (pp
= &eh
->dyn_relocs
; (p
= *pp
) != NULL
; pp
= &p
->next
)
1305 /* Everything must go for SEC. */
1311 r_type
= ELF32_R_TYPE (rel
->r_info
);
1312 r_type
= elf_i386_tls_transition (info
, r_type
, h
!= NULL
);
1316 if (elf_i386_hash_table (info
)->tls_ldm_got
.refcount
> 0)
1317 elf_i386_hash_table (info
)->tls_ldm_got
.refcount
-= 1;
1321 case R_386_TLS_IE_32
:
1323 case R_386_TLS_GOTIE
:
1327 if (h
->got
.refcount
> 0)
1328 h
->got
.refcount
-= 1;
1330 else if (local_got_refcounts
!= NULL
)
1332 if (local_got_refcounts
[r_symndx
] > 0)
1333 local_got_refcounts
[r_symndx
] -= 1;
1346 if (h
->plt
.refcount
> 0)
1347 h
->plt
.refcount
-= 1;
1359 /* Adjust a symbol defined by a dynamic object and referenced by a
1360 regular object. The current definition is in some section of the
1361 dynamic object, but we're not including those sections. We have to
1362 change the definition to something the rest of the link can
1366 elf_i386_adjust_dynamic_symbol (struct bfd_link_info
*info
,
1367 struct elf_link_hash_entry
*h
)
1369 struct elf_i386_link_hash_table
*htab
;
1371 unsigned int power_of_two
;
1373 /* If this is a function, put it in the procedure linkage table. We
1374 will fill in the contents of the procedure linkage table later,
1375 when we know the address of the .got section. */
1376 if (h
->type
== STT_FUNC
1379 if (h
->plt
.refcount
<= 0
1380 || SYMBOL_CALLS_LOCAL (info
, h
)
1381 || (ELF_ST_VISIBILITY (h
->other
) != STV_DEFAULT
1382 && h
->root
.type
== bfd_link_hash_undefweak
))
1384 /* This case can occur if we saw a PLT32 reloc in an input
1385 file, but the symbol was never referred to by a dynamic
1386 object, or if all references were garbage collected. In
1387 such a case, we don't actually need to build a procedure
1388 linkage table, and we can just do a PC32 reloc instead. */
1389 h
->plt
.offset
= (bfd_vma
) -1;
1396 /* It's possible that we incorrectly decided a .plt reloc was
1397 needed for an R_386_PC32 reloc to a non-function sym in
1398 check_relocs. We can't decide accurately between function and
1399 non-function syms in check-relocs; Objects loaded later in
1400 the link may change h->type. So fix it now. */
1401 h
->plt
.offset
= (bfd_vma
) -1;
1403 /* If this is a weak symbol, and there is a real definition, the
1404 processor independent code will have arranged for us to see the
1405 real definition first, and we can just use the same value. */
1406 if (h
->u
.weakdef
!= NULL
)
1408 BFD_ASSERT (h
->u
.weakdef
->root
.type
== bfd_link_hash_defined
1409 || h
->u
.weakdef
->root
.type
== bfd_link_hash_defweak
);
1410 h
->root
.u
.def
.section
= h
->u
.weakdef
->root
.u
.def
.section
;
1411 h
->root
.u
.def
.value
= h
->u
.weakdef
->root
.u
.def
.value
;
1412 if (ELIMINATE_COPY_RELOCS
|| info
->nocopyreloc
)
1413 h
->non_got_ref
= h
->u
.weakdef
->non_got_ref
;
1417 /* This is a reference to a symbol defined by a dynamic object which
1418 is not a function. */
1420 /* If we are creating a shared library, we must presume that the
1421 only references to the symbol are via the global offset table.
1422 For such cases we need not do anything here; the relocations will
1423 be handled correctly by relocate_section. */
1427 /* If there are no references to this symbol that do not use the
1428 GOT, we don't need to generate a copy reloc. */
1429 if (!h
->non_got_ref
)
1432 /* If -z nocopyreloc was given, we won't generate them either. */
1433 if (info
->nocopyreloc
)
1439 htab
= elf_i386_hash_table (info
);
1441 /* If there aren't any dynamic relocs in read-only sections, then
1442 we can keep the dynamic relocs and avoid the copy reloc. This
1443 doesn't work on VxWorks, where we can not have dynamic relocations
1444 (other than copy and jump slot relocations) in an executable. */
1445 if (ELIMINATE_COPY_RELOCS
&& !htab
->is_vxworks
)
1447 struct elf_i386_link_hash_entry
* eh
;
1448 struct elf_i386_dyn_relocs
*p
;
1450 eh
= (struct elf_i386_link_hash_entry
*) h
;
1451 for (p
= eh
->dyn_relocs
; p
!= NULL
; p
= p
->next
)
1453 s
= p
->sec
->output_section
;
1454 if (s
!= NULL
&& (s
->flags
& SEC_READONLY
) != 0)
1467 (*_bfd_error_handler
) (_("dynamic variable `%s' is zero size"),
1468 h
->root
.root
.string
);
1472 /* We must allocate the symbol in our .dynbss section, which will
1473 become part of the .bss section of the executable. There will be
1474 an entry for this symbol in the .dynsym section. The dynamic
1475 object will contain position independent code, so all references
1476 from the dynamic object to this symbol will go through the global
1477 offset table. The dynamic linker will use the .dynsym entry to
1478 determine the address it must put in the global offset table, so
1479 both the dynamic object and the regular object will refer to the
1480 same memory location for the variable. */
1482 /* We must generate a R_386_COPY reloc to tell the dynamic linker to
1483 copy the initial value out of the dynamic object and into the
1484 runtime process image. */
1485 if ((h
->root
.u
.def
.section
->flags
& SEC_ALLOC
) != 0)
1487 htab
->srelbss
->size
+= sizeof (Elf32_External_Rel
);
1491 /* We need to figure out the alignment required for this symbol. I
1492 have no idea how ELF linkers handle this. */
1493 power_of_two
= bfd_log2 (h
->size
);
1494 if (power_of_two
> 3)
1497 /* Apply the required alignment. */
1499 s
->size
= BFD_ALIGN (s
->size
, (bfd_size_type
) (1 << power_of_two
));
1500 if (power_of_two
> bfd_get_section_alignment (htab
->elf
.dynobj
, s
))
1502 if (! bfd_set_section_alignment (htab
->elf
.dynobj
, s
, power_of_two
))
1506 /* Define the symbol as being at this point in the section. */
1507 h
->root
.u
.def
.section
= s
;
1508 h
->root
.u
.def
.value
= s
->size
;
1510 /* Increment the section size to make room for the symbol. */
1516 /* Allocate space in .plt, .got and associated reloc sections for
1520 allocate_dynrelocs (struct elf_link_hash_entry
*h
, void *inf
)
1522 struct bfd_link_info
*info
;
1523 struct elf_i386_link_hash_table
*htab
;
1524 struct elf_i386_link_hash_entry
*eh
;
1525 struct elf_i386_dyn_relocs
*p
;
1527 if (h
->root
.type
== bfd_link_hash_indirect
)
1530 if (h
->root
.type
== bfd_link_hash_warning
)
1531 /* When warning symbols are created, they **replace** the "real"
1532 entry in the hash table, thus we never get to see the real
1533 symbol in a hash traversal. So look at it now. */
1534 h
= (struct elf_link_hash_entry
*) h
->root
.u
.i
.link
;
1536 info
= (struct bfd_link_info
*) inf
;
1537 htab
= elf_i386_hash_table (info
);
1539 if (htab
->elf
.dynamic_sections_created
1540 && h
->plt
.refcount
> 0)
1542 /* Make sure this symbol is output as a dynamic symbol.
1543 Undefined weak syms won't yet be marked as dynamic. */
1544 if (h
->dynindx
== -1
1545 && !h
->forced_local
)
1547 if (! bfd_elf_link_record_dynamic_symbol (info
, h
))
1552 || WILL_CALL_FINISH_DYNAMIC_SYMBOL (1, 0, h
))
1554 asection
*s
= htab
->splt
;
1556 /* If this is the first .plt entry, make room for the special
1559 s
->size
+= PLT_ENTRY_SIZE
;
1561 h
->plt
.offset
= s
->size
;
1563 /* If this symbol is not defined in a regular file, and we are
1564 not generating a shared library, then set the symbol to this
1565 location in the .plt. This is required to make function
1566 pointers compare as equal between the normal executable and
1567 the shared library. */
1571 h
->root
.u
.def
.section
= s
;
1572 h
->root
.u
.def
.value
= h
->plt
.offset
;
1575 /* Make room for this entry. */
1576 s
->size
+= PLT_ENTRY_SIZE
;
1578 /* We also need to make an entry in the .got.plt section, which
1579 will be placed in the .got section by the linker script. */
1580 htab
->sgotplt
->size
+= 4;
1582 /* We also need to make an entry in the .rel.plt section. */
1583 htab
->srelplt
->size
+= sizeof (Elf32_External_Rel
);
1585 if (htab
->is_vxworks
&& !info
->shared
)
1587 /* VxWorks has a second set of relocations for each PLT entry
1588 in executables. They go in a separate relocation section,
1589 which is processed by the kernel loader. */
1591 /* There are two relocations for the initial PLT entry: an
1592 R_386_32 relocation for _GLOBAL_OFFSET_TABLE_ + 4 and an
1593 R_386_32 relocation for _GLOBAL_OFFSET_TABLE_ + 8. */
1595 if (h
->plt
.offset
== PLT_ENTRY_SIZE
)
1596 htab
->srelplt2
->size
+= (sizeof (Elf32_External_Rel
) * 2);
1598 /* There are two extra relocations for each subsequent PLT entry:
1599 an R_386_32 relocation for the GOT entry, and an R_386_32
1600 relocation for the PLT entry. */
1602 htab
->srelplt2
->size
+= (sizeof (Elf32_External_Rel
) * 2);
1607 h
->plt
.offset
= (bfd_vma
) -1;
1613 h
->plt
.offset
= (bfd_vma
) -1;
1617 /* If R_386_TLS_{IE_32,IE,GOTIE} symbol is now local to the binary,
1618 make it a R_386_TLS_LE_32 requiring no TLS entry. */
1619 if (h
->got
.refcount
> 0
1622 && (elf_i386_hash_entry(h
)->tls_type
& GOT_TLS_IE
))
1623 h
->got
.offset
= (bfd_vma
) -1;
1624 else if (h
->got
.refcount
> 0)
1628 int tls_type
= elf_i386_hash_entry(h
)->tls_type
;
1630 /* Make sure this symbol is output as a dynamic symbol.
1631 Undefined weak syms won't yet be marked as dynamic. */
1632 if (h
->dynindx
== -1
1633 && !h
->forced_local
)
1635 if (! bfd_elf_link_record_dynamic_symbol (info
, h
))
1640 h
->got
.offset
= s
->size
;
1642 /* R_386_TLS_GD needs 2 consecutive GOT slots. */
1643 if (tls_type
== GOT_TLS_GD
|| tls_type
== GOT_TLS_IE_BOTH
)
1645 dyn
= htab
->elf
.dynamic_sections_created
;
1646 /* R_386_TLS_IE_32 needs one dynamic relocation,
1647 R_386_TLS_IE resp. R_386_TLS_GOTIE needs one dynamic relocation,
1648 (but if both R_386_TLS_IE_32 and R_386_TLS_IE is present, we
1649 need two), R_386_TLS_GD needs one if local symbol and two if
1651 if (tls_type
== GOT_TLS_IE_BOTH
)
1652 htab
->srelgot
->size
+= 2 * sizeof (Elf32_External_Rel
);
1653 else if ((tls_type
== GOT_TLS_GD
&& h
->dynindx
== -1)
1654 || (tls_type
& GOT_TLS_IE
))
1655 htab
->srelgot
->size
+= sizeof (Elf32_External_Rel
);
1656 else if (tls_type
== GOT_TLS_GD
)
1657 htab
->srelgot
->size
+= 2 * sizeof (Elf32_External_Rel
);
1658 else if ((ELF_ST_VISIBILITY (h
->other
) == STV_DEFAULT
1659 || h
->root
.type
!= bfd_link_hash_undefweak
)
1661 || WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn
, 0, h
)))
1662 htab
->srelgot
->size
+= sizeof (Elf32_External_Rel
);
1665 h
->got
.offset
= (bfd_vma
) -1;
1667 eh
= (struct elf_i386_link_hash_entry
*) h
;
1668 if (eh
->dyn_relocs
== NULL
)
1671 /* In the shared -Bsymbolic case, discard space allocated for
1672 dynamic pc-relative relocs against symbols which turn out to be
1673 defined in regular objects. For the normal shared case, discard
1674 space for pc-relative relocs that have become local due to symbol
1675 visibility changes. */
1679 /* The only reloc that uses pc_count is R_386_PC32, which will
1680 appear on a call or on something like ".long foo - .". We
1681 want calls to protected symbols to resolve directly to the
1682 function rather than going via the plt. If people want
1683 function pointer comparisons to work as expected then they
1684 should avoid writing assembly like ".long foo - .". */
1685 if (SYMBOL_CALLS_LOCAL (info
, h
))
1687 struct elf_i386_dyn_relocs
**pp
;
1689 for (pp
= &eh
->dyn_relocs
; (p
= *pp
) != NULL
; )
1691 p
->count
-= p
->pc_count
;
1700 /* Also discard relocs on undefined weak syms with non-default
1702 if (ELF_ST_VISIBILITY (h
->other
) != STV_DEFAULT
1703 && h
->root
.type
== bfd_link_hash_undefweak
)
1704 eh
->dyn_relocs
= NULL
;
1706 else if (ELIMINATE_COPY_RELOCS
)
1708 /* For the non-shared case, discard space for relocs against
1709 symbols which turn out to need copy relocs or are not
1715 || (htab
->elf
.dynamic_sections_created
1716 && (h
->root
.type
== bfd_link_hash_undefweak
1717 || h
->root
.type
== bfd_link_hash_undefined
))))
1719 /* Make sure this symbol is output as a dynamic symbol.
1720 Undefined weak syms won't yet be marked as dynamic. */
1721 if (h
->dynindx
== -1
1722 && !h
->forced_local
)
1724 if (! bfd_elf_link_record_dynamic_symbol (info
, h
))
1728 /* If that succeeded, we know we'll be keeping all the
1730 if (h
->dynindx
!= -1)
1734 eh
->dyn_relocs
= NULL
;
1739 /* Finally, allocate space. */
1740 for (p
= eh
->dyn_relocs
; p
!= NULL
; p
= p
->next
)
1742 asection
*sreloc
= elf_section_data (p
->sec
)->sreloc
;
1743 sreloc
->size
+= p
->count
* sizeof (Elf32_External_Rel
);
1749 /* Find any dynamic relocs that apply to read-only sections. */
1752 readonly_dynrelocs (struct elf_link_hash_entry
*h
, void *inf
)
1754 struct elf_i386_link_hash_entry
*eh
;
1755 struct elf_i386_dyn_relocs
*p
;
1757 if (h
->root
.type
== bfd_link_hash_warning
)
1758 h
= (struct elf_link_hash_entry
*) h
->root
.u
.i
.link
;
1760 eh
= (struct elf_i386_link_hash_entry
*) h
;
1761 for (p
= eh
->dyn_relocs
; p
!= NULL
; p
= p
->next
)
1763 asection
*s
= p
->sec
->output_section
;
1765 if (s
!= NULL
&& (s
->flags
& SEC_READONLY
) != 0)
1767 struct bfd_link_info
*info
= (struct bfd_link_info
*) inf
;
1769 info
->flags
|= DF_TEXTREL
;
1771 /* Not an error, just cut short the traversal. */
1778 /* Set the sizes of the dynamic sections. */
1781 elf_i386_size_dynamic_sections (bfd
*output_bfd ATTRIBUTE_UNUSED
,
1782 struct bfd_link_info
*info
)
1784 struct elf_i386_link_hash_table
*htab
;
1790 htab
= elf_i386_hash_table (info
);
1791 dynobj
= htab
->elf
.dynobj
;
1795 if (htab
->elf
.dynamic_sections_created
)
1797 /* Set the contents of the .interp section to the interpreter. */
1798 if (info
->executable
)
1800 s
= bfd_get_section_by_name (dynobj
, ".interp");
1803 s
->size
= sizeof ELF_DYNAMIC_INTERPRETER
;
1804 s
->contents
= (unsigned char *) ELF_DYNAMIC_INTERPRETER
;
1808 /* Set up .got offsets for local syms, and space for local dynamic
1810 for (ibfd
= info
->input_bfds
; ibfd
!= NULL
; ibfd
= ibfd
->link_next
)
1812 bfd_signed_vma
*local_got
;
1813 bfd_signed_vma
*end_local_got
;
1814 char *local_tls_type
;
1815 bfd_size_type locsymcount
;
1816 Elf_Internal_Shdr
*symtab_hdr
;
1819 if (bfd_get_flavour (ibfd
) != bfd_target_elf_flavour
)
1822 for (s
= ibfd
->sections
; s
!= NULL
; s
= s
->next
)
1824 struct elf_i386_dyn_relocs
*p
;
1826 for (p
= *((struct elf_i386_dyn_relocs
**)
1827 &elf_section_data (s
)->local_dynrel
);
1831 if (!bfd_is_abs_section (p
->sec
)
1832 && bfd_is_abs_section (p
->sec
->output_section
))
1834 /* Input section has been discarded, either because
1835 it is a copy of a linkonce section or due to
1836 linker script /DISCARD/, so we'll be discarding
1839 else if (p
->count
!= 0)
1841 srel
= elf_section_data (p
->sec
)->sreloc
;
1842 srel
->size
+= p
->count
* sizeof (Elf32_External_Rel
);
1843 if ((p
->sec
->output_section
->flags
& SEC_READONLY
) != 0)
1844 info
->flags
|= DF_TEXTREL
;
1849 local_got
= elf_local_got_refcounts (ibfd
);
1853 symtab_hdr
= &elf_tdata (ibfd
)->symtab_hdr
;
1854 locsymcount
= symtab_hdr
->sh_info
;
1855 end_local_got
= local_got
+ locsymcount
;
1856 local_tls_type
= elf_i386_local_got_tls_type (ibfd
);
1858 srel
= htab
->srelgot
;
1859 for (; local_got
< end_local_got
; ++local_got
, ++local_tls_type
)
1863 *local_got
= s
->size
;
1865 if (*local_tls_type
== GOT_TLS_GD
1866 || *local_tls_type
== GOT_TLS_IE_BOTH
)
1869 || *local_tls_type
== GOT_TLS_GD
1870 || (*local_tls_type
& GOT_TLS_IE
))
1872 if (*local_tls_type
== GOT_TLS_IE_BOTH
)
1873 srel
->size
+= 2 * sizeof (Elf32_External_Rel
);
1875 srel
->size
+= sizeof (Elf32_External_Rel
);
1879 *local_got
= (bfd_vma
) -1;
1883 if (htab
->tls_ldm_got
.refcount
> 0)
1885 /* Allocate 2 got entries and 1 dynamic reloc for R_386_TLS_LDM
1887 htab
->tls_ldm_got
.offset
= htab
->sgot
->size
;
1888 htab
->sgot
->size
+= 8;
1889 htab
->srelgot
->size
+= sizeof (Elf32_External_Rel
);
1892 htab
->tls_ldm_got
.offset
= -1;
1894 if (htab
->is_vxworks
)
1896 /* Save the GOT and PLT symbols in the hash table for easy access.
1897 Mark them as having relocations; they might not, but we won't
1898 know for sure until we build the GOT in finish_dynamic_symbol. */
1900 htab
->hgot
= elf_link_hash_lookup (elf_hash_table (info
),
1901 "_GLOBAL_OFFSET_TABLE_",
1902 FALSE
, FALSE
, FALSE
);
1904 htab
->hgot
->indx
= -2;
1905 htab
->hplt
= elf_link_hash_lookup (elf_hash_table (info
),
1906 "_PROCEDURE_LINKAGE_TABLE_",
1907 FALSE
, FALSE
, FALSE
);
1909 htab
->hplt
->indx
= -2;
1911 if (htab
->is_vxworks
&& htab
->hplt
&& htab
->splt
->flags
& SEC_CODE
)
1912 htab
->hplt
->type
= STT_FUNC
;
1915 /* Allocate global sym .plt and .got entries, and space for global
1916 sym dynamic relocs. */
1917 elf_link_hash_traverse (&htab
->elf
, allocate_dynrelocs
, (PTR
) info
);
1919 /* We now have determined the sizes of the various dynamic sections.
1920 Allocate memory for them. */
1922 for (s
= dynobj
->sections
; s
!= NULL
; s
= s
->next
)
1924 bfd_boolean strip_section
= TRUE
;
1926 if ((s
->flags
& SEC_LINKER_CREATED
) == 0)
1931 || s
== htab
->sgotplt
1932 || s
== htab
->sdynbss
)
1934 /* Strip this section if we don't need it; see the
1936 /* We'd like to strip these sections if they aren't needed, but if
1937 we've exported dynamic symbols from them we must leave them.
1938 It's too late to tell BFD to get rid of the symbols. */
1940 if (htab
->hplt
!= NULL
)
1941 strip_section
= FALSE
;
1943 else if (strncmp (bfd_get_section_name (dynobj
, s
), ".rel", 4) == 0)
1945 if (s
->size
!= 0 && s
!= htab
->srelplt
&& s
!= htab
->srelplt2
)
1948 /* We use the reloc_count field as a counter if we need
1949 to copy relocs into the output file. */
1954 /* It's not one of our sections, so don't allocate space. */
1960 /* If we don't need this section, strip it from the
1961 output file. This is mostly to handle .rel.bss and
1962 .rel.plt. We must create both sections in
1963 create_dynamic_sections, because they must be created
1964 before the linker maps input sections to output
1965 sections. The linker does that before
1966 adjust_dynamic_symbol is called, and it is that
1967 function which decides whether anything needs to go
1968 into these sections. */
1970 s
->flags
|= SEC_EXCLUDE
;
1974 if ((s
->flags
& SEC_HAS_CONTENTS
) == 0)
1977 /* Allocate memory for the section contents. We use bfd_zalloc
1978 here in case unused entries are not reclaimed before the
1979 section's contents are written out. This should not happen,
1980 but this way if it does, we get a R_386_NONE reloc instead
1982 s
->contents
= bfd_zalloc (dynobj
, s
->size
);
1983 if (s
->contents
== NULL
)
1987 if (htab
->elf
.dynamic_sections_created
)
1989 /* Add some entries to the .dynamic section. We fill in the
1990 values later, in elf_i386_finish_dynamic_sections, but we
1991 must add the entries now so that we get the correct size for
1992 the .dynamic section. The DT_DEBUG entry is filled in by the
1993 dynamic linker and used by the debugger. */
1994 #define add_dynamic_entry(TAG, VAL) \
1995 _bfd_elf_add_dynamic_entry (info, TAG, VAL)
1997 if (info
->executable
)
1999 if (!add_dynamic_entry (DT_DEBUG
, 0))
2003 if (htab
->splt
->size
!= 0)
2005 if (!add_dynamic_entry (DT_PLTGOT
, 0)
2006 || !add_dynamic_entry (DT_PLTRELSZ
, 0)
2007 || !add_dynamic_entry (DT_PLTREL
, DT_REL
)
2008 || !add_dynamic_entry (DT_JMPREL
, 0))
2014 if (!add_dynamic_entry (DT_REL
, 0)
2015 || !add_dynamic_entry (DT_RELSZ
, 0)
2016 || !add_dynamic_entry (DT_RELENT
, sizeof (Elf32_External_Rel
)))
2019 /* If any dynamic relocs apply to a read-only section,
2020 then we need a DT_TEXTREL entry. */
2021 if ((info
->flags
& DF_TEXTREL
) == 0)
2022 elf_link_hash_traverse (&htab
->elf
, readonly_dynrelocs
,
2025 if ((info
->flags
& DF_TEXTREL
) != 0)
2027 if (!add_dynamic_entry (DT_TEXTREL
, 0))
2032 #undef add_dynamic_entry
2037 /* Set the correct type for an x86 ELF section. We do this by the
2038 section name, which is a hack, but ought to work. */
2041 elf_i386_fake_sections (bfd
*abfd ATTRIBUTE_UNUSED
,
2042 Elf_Internal_Shdr
*hdr
,
2045 register const char *name
;
2047 name
= bfd_get_section_name (abfd
, sec
);
2049 /* This is an ugly, but unfortunately necessary hack that is
2050 needed when producing EFI binaries on x86. It tells
2051 elf.c:elf_fake_sections() not to consider ".reloc" as a section
2052 containing ELF relocation info. We need this hack in order to
2053 be able to generate ELF binaries that can be translated into
2054 EFI applications (which are essentially COFF objects). Those
2055 files contain a COFF ".reloc" section inside an ELFNN object,
2056 which would normally cause BFD to segfault because it would
2057 attempt to interpret this section as containing relocation
2058 entries for section "oc". With this hack enabled, ".reloc"
2059 will be treated as a normal data section, which will avoid the
2060 segfault. However, you won't be able to create an ELFNN binary
2061 with a section named "oc" that needs relocations, but that's
2062 the kind of ugly side-effects you get when detecting section
2063 types based on their names... In practice, this limitation is
2064 unlikely to bite. */
2065 if (strcmp (name
, ".reloc") == 0)
2066 hdr
->sh_type
= SHT_PROGBITS
;
2071 /* Return the base VMA address which should be subtracted from real addresses
2072 when resolving @dtpoff relocation.
2073 This is PT_TLS segment p_vaddr. */
2076 dtpoff_base (struct bfd_link_info
*info
)
2078 /* If tls_sec is NULL, we should have signalled an error already. */
2079 if (elf_hash_table (info
)->tls_sec
== NULL
)
2081 return elf_hash_table (info
)->tls_sec
->vma
;
2084 /* Return the relocation value for @tpoff relocation
2085 if STT_TLS virtual address is ADDRESS. */
2088 tpoff (struct bfd_link_info
*info
, bfd_vma address
)
2090 struct elf_link_hash_table
*htab
= elf_hash_table (info
);
2092 /* If tls_sec is NULL, we should have signalled an error already. */
2093 if (htab
->tls_sec
== NULL
)
2095 return htab
->tls_size
+ htab
->tls_sec
->vma
- address
;
2098 /* Relocate an i386 ELF section. */
2101 elf_i386_relocate_section (bfd
*output_bfd
,
2102 struct bfd_link_info
*info
,
2104 asection
*input_section
,
2106 Elf_Internal_Rela
*relocs
,
2107 Elf_Internal_Sym
*local_syms
,
2108 asection
**local_sections
)
2110 struct elf_i386_link_hash_table
*htab
;
2111 Elf_Internal_Shdr
*symtab_hdr
;
2112 struct elf_link_hash_entry
**sym_hashes
;
2113 bfd_vma
*local_got_offsets
;
2114 Elf_Internal_Rela
*rel
;
2115 Elf_Internal_Rela
*relend
;
2117 htab
= elf_i386_hash_table (info
);
2118 symtab_hdr
= &elf_tdata (input_bfd
)->symtab_hdr
;
2119 sym_hashes
= elf_sym_hashes (input_bfd
);
2120 local_got_offsets
= elf_local_got_offsets (input_bfd
);
2123 relend
= relocs
+ input_section
->reloc_count
;
2124 for (; rel
< relend
; rel
++)
2126 unsigned int r_type
;
2127 reloc_howto_type
*howto
;
2128 unsigned long r_symndx
;
2129 struct elf_link_hash_entry
*h
;
2130 Elf_Internal_Sym
*sym
;
2134 bfd_boolean unresolved_reloc
;
2135 bfd_reloc_status_type r
;
2139 r_type
= ELF32_R_TYPE (rel
->r_info
);
2140 if (r_type
== R_386_GNU_VTINHERIT
2141 || r_type
== R_386_GNU_VTENTRY
)
2144 if ((indx
= r_type
) >= R_386_standard
2145 && ((indx
= r_type
- R_386_ext_offset
) - R_386_standard
2146 >= R_386_ext
- R_386_standard
)
2147 && ((indx
= r_type
- R_386_tls_offset
) - R_386_ext
2148 >= R_386_tls
- R_386_ext
))
2150 (*_bfd_error_handler
)
2151 (_("%B: unrecognized relocation (0x%x) in section `%A'"),
2152 input_bfd
, input_section
, r_type
);
2153 bfd_set_error (bfd_error_bad_value
);
2156 howto
= elf_howto_table
+ indx
;
2158 r_symndx
= ELF32_R_SYM (rel
->r_info
);
2160 if (info
->relocatable
)
2165 /* This is a relocatable link. We don't have to change
2166 anything, unless the reloc is against a section symbol,
2167 in which case we have to adjust according to where the
2168 section symbol winds up in the output section. */
2169 if (r_symndx
>= symtab_hdr
->sh_info
)
2172 sym
= local_syms
+ r_symndx
;
2173 if (ELF_ST_TYPE (sym
->st_info
) != STT_SECTION
)
2176 sec
= local_sections
[r_symndx
];
2177 val
= sec
->output_offset
;
2181 where
= contents
+ rel
->r_offset
;
2182 switch (howto
->size
)
2184 /* FIXME: overflow checks. */
2186 val
+= bfd_get_8 (input_bfd
, where
);
2187 bfd_put_8 (input_bfd
, val
, where
);
2190 val
+= bfd_get_16 (input_bfd
, where
);
2191 bfd_put_16 (input_bfd
, val
, where
);
2194 val
+= bfd_get_32 (input_bfd
, where
);
2195 bfd_put_32 (input_bfd
, val
, where
);
2203 /* This is a final link. */
2207 unresolved_reloc
= FALSE
;
2208 if (r_symndx
< symtab_hdr
->sh_info
)
2210 sym
= local_syms
+ r_symndx
;
2211 sec
= local_sections
[r_symndx
];
2212 relocation
= (sec
->output_section
->vma
2213 + sec
->output_offset
2215 if ((sec
->flags
& SEC_MERGE
)
2216 && ELF_ST_TYPE (sym
->st_info
) == STT_SECTION
)
2220 bfd_byte
*where
= contents
+ rel
->r_offset
;
2222 switch (howto
->size
)
2225 addend
= bfd_get_8 (input_bfd
, where
);
2226 if (howto
->pc_relative
)
2228 addend
= (addend
^ 0x80) - 0x80;
2233 addend
= bfd_get_16 (input_bfd
, where
);
2234 if (howto
->pc_relative
)
2236 addend
= (addend
^ 0x8000) - 0x8000;
2241 addend
= bfd_get_32 (input_bfd
, where
);
2242 if (howto
->pc_relative
)
2244 addend
= (addend
^ 0x80000000) - 0x80000000;
2253 addend
= _bfd_elf_rel_local_sym (output_bfd
, sym
, &msec
, addend
);
2254 addend
-= relocation
;
2255 addend
+= msec
->output_section
->vma
+ msec
->output_offset
;
2257 switch (howto
->size
)
2260 /* FIXME: overflow checks. */
2261 if (howto
->pc_relative
)
2263 bfd_put_8 (input_bfd
, addend
, where
);
2266 if (howto
->pc_relative
)
2268 bfd_put_16 (input_bfd
, addend
, where
);
2271 if (howto
->pc_relative
)
2273 bfd_put_32 (input_bfd
, addend
, where
);
2282 RELOC_FOR_GLOBAL_SYMBOL (info
, input_bfd
, input_section
, rel
,
2283 r_symndx
, symtab_hdr
, sym_hashes
,
2285 unresolved_reloc
, warned
);
2290 /* r_symndx will be zero only for relocs against symbols from
2291 removed linkonce sections, or sections discarded by a linker
2292 script. For these relocs, we just want the section contents
2293 zeroed. Avoid any special processing in the switch below. */
2294 r_type
= R_386_NONE
;
2297 if (howto
->pc_relative
)
2298 relocation
= (input_section
->output_section
->vma
2299 + input_section
->output_offset
2306 /* Relocation is to the entry for this symbol in the global
2308 if (htab
->sgot
== NULL
)
2315 off
= h
->got
.offset
;
2316 dyn
= htab
->elf
.dynamic_sections_created
;
2317 if (! WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn
, info
->shared
, h
)
2319 && SYMBOL_REFERENCES_LOCAL (info
, h
))
2320 || (ELF_ST_VISIBILITY (h
->other
)
2321 && h
->root
.type
== bfd_link_hash_undefweak
))
2323 /* This is actually a static link, or it is a
2324 -Bsymbolic link and the symbol is defined
2325 locally, or the symbol was forced to be local
2326 because of a version file. We must initialize
2327 this entry in the global offset table. Since the
2328 offset must always be a multiple of 4, we use the
2329 least significant bit to record whether we have
2330 initialized it already.
2332 When doing a dynamic link, we create a .rel.got
2333 relocation entry to initialize the value. This
2334 is done in the finish_dynamic_symbol routine. */
2339 bfd_put_32 (output_bfd
, relocation
,
2340 htab
->sgot
->contents
+ off
);
2345 unresolved_reloc
= FALSE
;
2349 if (local_got_offsets
== NULL
)
2352 off
= local_got_offsets
[r_symndx
];
2354 /* The offset must always be a multiple of 4. We use
2355 the least significant bit to record whether we have
2356 already generated the necessary reloc. */
2361 bfd_put_32 (output_bfd
, relocation
,
2362 htab
->sgot
->contents
+ off
);
2367 Elf_Internal_Rela outrel
;
2374 outrel
.r_offset
= (htab
->sgot
->output_section
->vma
2375 + htab
->sgot
->output_offset
2377 outrel
.r_info
= ELF32_R_INFO (0, R_386_RELATIVE
);
2379 loc
+= s
->reloc_count
++ * sizeof (Elf32_External_Rel
);
2380 bfd_elf32_swap_reloc_out (output_bfd
, &outrel
, loc
);
2383 local_got_offsets
[r_symndx
] |= 1;
2387 if (off
>= (bfd_vma
) -2)
2390 relocation
= htab
->sgot
->output_section
->vma
2391 + htab
->sgot
->output_offset
+ off
2392 - htab
->sgotplt
->output_section
->vma
2393 - htab
->sgotplt
->output_offset
;
2397 /* Relocation is relative to the start of the global offset
2400 /* Check to make sure it isn't a protected function symbol
2401 for shared library since it may not be local when used
2402 as function address. */
2404 && !info
->executable
2407 && h
->type
== STT_FUNC
2408 && ELF_ST_VISIBILITY (h
->other
) == STV_PROTECTED
)
2410 (*_bfd_error_handler
)
2411 (_("%B: relocation R_386_GOTOFF against protected function `%s' can not be used when making a shared object"),
2412 input_bfd
, h
->root
.root
.string
);
2413 bfd_set_error (bfd_error_bad_value
);
2417 /* Note that sgot is not involved in this
2418 calculation. We always want the start of .got.plt. If we
2419 defined _GLOBAL_OFFSET_TABLE_ in a different way, as is
2420 permitted by the ABI, we might have to change this
2422 relocation
-= htab
->sgotplt
->output_section
->vma
2423 + htab
->sgotplt
->output_offset
;
2427 /* Use global offset table as symbol value. */
2428 relocation
= htab
->sgotplt
->output_section
->vma
2429 + htab
->sgotplt
->output_offset
;
2430 unresolved_reloc
= FALSE
;
2434 /* Relocation is to the entry for this symbol in the
2435 procedure linkage table. */
2437 /* Resolve a PLT32 reloc against a local symbol directly,
2438 without using the procedure linkage table. */
2442 if (h
->plt
.offset
== (bfd_vma
) -1
2443 || htab
->splt
== NULL
)
2445 /* We didn't make a PLT entry for this symbol. This
2446 happens when statically linking PIC code, or when
2447 using -Bsymbolic. */
2451 relocation
= (htab
->splt
->output_section
->vma
2452 + htab
->splt
->output_offset
2454 unresolved_reloc
= FALSE
;
2459 if ((input_section
->flags
& SEC_ALLOC
) == 0)
2464 || ELF_ST_VISIBILITY (h
->other
) == STV_DEFAULT
2465 || h
->root
.type
!= bfd_link_hash_undefweak
)
2466 && (r_type
!= R_386_PC32
2467 || !SYMBOL_CALLS_LOCAL (info
, h
)))
2468 || (ELIMINATE_COPY_RELOCS
2475 || h
->root
.type
== bfd_link_hash_undefweak
2476 || h
->root
.type
== bfd_link_hash_undefined
)))
2478 Elf_Internal_Rela outrel
;
2480 bfd_boolean skip
, relocate
;
2483 /* When generating a shared object, these relocations
2484 are copied into the output file to be resolved at run
2491 _bfd_elf_section_offset (output_bfd
, info
, input_section
,
2493 if (outrel
.r_offset
== (bfd_vma
) -1)
2495 else if (outrel
.r_offset
== (bfd_vma
) -2)
2496 skip
= TRUE
, relocate
= TRUE
;
2497 outrel
.r_offset
+= (input_section
->output_section
->vma
2498 + input_section
->output_offset
);
2501 memset (&outrel
, 0, sizeof outrel
);
2504 && (r_type
== R_386_PC32
2507 || !h
->def_regular
))
2508 outrel
.r_info
= ELF32_R_INFO (h
->dynindx
, r_type
);
2511 /* This symbol is local, or marked to become local. */
2513 outrel
.r_info
= ELF32_R_INFO (0, R_386_RELATIVE
);
2516 sreloc
= elf_section_data (input_section
)->sreloc
;
2520 loc
= sreloc
->contents
;
2521 loc
+= sreloc
->reloc_count
++ * sizeof (Elf32_External_Rel
);
2522 bfd_elf32_swap_reloc_out (output_bfd
, &outrel
, loc
);
2524 /* If this reloc is against an external symbol, we do
2525 not want to fiddle with the addend. Otherwise, we
2526 need to include the symbol value so that it becomes
2527 an addend for the dynamic reloc. */
2536 Elf_Internal_Rela outrel
;
2540 outrel
.r_offset
= rel
->r_offset
2541 + input_section
->output_section
->vma
2542 + input_section
->output_offset
;
2543 outrel
.r_info
= ELF32_R_INFO (0, R_386_RELATIVE
);
2544 sreloc
= elf_section_data (input_section
)->sreloc
;
2547 loc
= sreloc
->contents
;
2548 loc
+= sreloc
->reloc_count
++ * sizeof (Elf32_External_Rel
);
2549 bfd_elf32_swap_reloc_out (output_bfd
, &outrel
, loc
);
2554 case R_386_TLS_IE_32
:
2555 case R_386_TLS_GOTIE
:
2556 r_type
= elf_i386_tls_transition (info
, r_type
, h
== NULL
);
2557 tls_type
= GOT_UNKNOWN
;
2558 if (h
== NULL
&& local_got_offsets
)
2559 tls_type
= elf_i386_local_got_tls_type (input_bfd
) [r_symndx
];
2562 tls_type
= elf_i386_hash_entry(h
)->tls_type
;
2563 if (!info
->shared
&& h
->dynindx
== -1 && (tls_type
& GOT_TLS_IE
))
2564 r_type
= R_386_TLS_LE_32
;
2566 if (tls_type
== GOT_TLS_IE
)
2567 tls_type
= GOT_TLS_IE_NEG
;
2568 if (r_type
== R_386_TLS_GD
)
2570 if (tls_type
== GOT_TLS_IE_POS
)
2571 r_type
= R_386_TLS_GOTIE
;
2572 else if (tls_type
& GOT_TLS_IE
)
2573 r_type
= R_386_TLS_IE_32
;
2576 if (r_type
== R_386_TLS_LE_32
)
2578 BFD_ASSERT (! unresolved_reloc
);
2579 if (ELF32_R_TYPE (rel
->r_info
) == R_386_TLS_GD
)
2581 unsigned int val
, type
;
2584 /* GD->LE transition. */
2585 BFD_ASSERT (rel
->r_offset
>= 2);
2586 type
= bfd_get_8 (input_bfd
, contents
+ rel
->r_offset
- 2);
2587 BFD_ASSERT (type
== 0x8d || type
== 0x04);
2588 BFD_ASSERT (rel
->r_offset
+ 9 <= input_section
->size
);
2589 BFD_ASSERT (bfd_get_8 (input_bfd
,
2590 contents
+ rel
->r_offset
+ 4)
2592 BFD_ASSERT (rel
+ 1 < relend
);
2593 BFD_ASSERT (ELF32_R_TYPE (rel
[1].r_info
) == R_386_PLT32
);
2594 roff
= rel
->r_offset
+ 5;
2595 val
= bfd_get_8 (input_bfd
,
2596 contents
+ rel
->r_offset
- 1);
2599 /* leal foo(,%reg,1), %eax; call ___tls_get_addr
2601 movl %gs:0, %eax; subl $foo@tpoff, %eax
2602 (6 byte form of subl). */
2603 BFD_ASSERT (rel
->r_offset
>= 3);
2604 BFD_ASSERT (bfd_get_8 (input_bfd
,
2605 contents
+ rel
->r_offset
- 3)
2607 BFD_ASSERT ((val
& 0xc7) == 0x05 && val
!= (4 << 3));
2608 memcpy (contents
+ rel
->r_offset
- 3,
2609 "\x65\xa1\0\0\0\0\x81\xe8\0\0\0", 12);
2613 BFD_ASSERT ((val
& 0xf8) == 0x80 && (val
& 7) != 4);
2614 if (rel
->r_offset
+ 10 <= input_section
->size
2615 && bfd_get_8 (input_bfd
,
2616 contents
+ rel
->r_offset
+ 9) == 0x90)
2618 /* leal foo(%reg), %eax; call ___tls_get_addr; nop
2620 movl %gs:0, %eax; subl $foo@tpoff, %eax
2621 (6 byte form of subl). */
2622 memcpy (contents
+ rel
->r_offset
- 2,
2623 "\x65\xa1\0\0\0\0\x81\xe8\0\0\0", 12);
2624 roff
= rel
->r_offset
+ 6;
2628 /* leal foo(%reg), %eax; call ___tls_get_addr
2630 movl %gs:0, %eax; subl $foo@tpoff, %eax
2631 (5 byte form of subl). */
2632 memcpy (contents
+ rel
->r_offset
- 2,
2633 "\x65\xa1\0\0\0\0\x2d\0\0\0", 11);
2636 bfd_put_32 (output_bfd
, tpoff (info
, relocation
),
2638 /* Skip R_386_PLT32. */
2642 else if (ELF32_R_TYPE (rel
->r_info
) == R_386_TLS_IE
)
2644 unsigned int val
, type
;
2646 /* IE->LE transition:
2647 Originally it can be one of:
2655 BFD_ASSERT (rel
->r_offset
>= 1);
2656 val
= bfd_get_8 (input_bfd
, contents
+ rel
->r_offset
- 1);
2657 BFD_ASSERT (rel
->r_offset
+ 4 <= input_section
->size
);
2660 /* movl foo, %eax. */
2661 bfd_put_8 (output_bfd
, 0xb8,
2662 contents
+ rel
->r_offset
- 1);
2666 BFD_ASSERT (rel
->r_offset
>= 2);
2667 type
= bfd_get_8 (input_bfd
,
2668 contents
+ rel
->r_offset
- 2);
2673 BFD_ASSERT ((val
& 0xc7) == 0x05);
2674 bfd_put_8 (output_bfd
, 0xc7,
2675 contents
+ rel
->r_offset
- 2);
2676 bfd_put_8 (output_bfd
,
2677 0xc0 | ((val
>> 3) & 7),
2678 contents
+ rel
->r_offset
- 1);
2682 BFD_ASSERT ((val
& 0xc7) == 0x05);
2683 bfd_put_8 (output_bfd
, 0x81,
2684 contents
+ rel
->r_offset
- 2);
2685 bfd_put_8 (output_bfd
,
2686 0xc0 | ((val
>> 3) & 7),
2687 contents
+ rel
->r_offset
- 1);
2694 bfd_put_32 (output_bfd
, -tpoff (info
, relocation
),
2695 contents
+ rel
->r_offset
);
2700 unsigned int val
, type
;
2702 /* {IE_32,GOTIE}->LE transition:
2703 Originally it can be one of:
2704 subl foo(%reg1), %reg2
2705 movl foo(%reg1), %reg2
2706 addl foo(%reg1), %reg2
2709 movl $foo, %reg2 (6 byte form)
2710 addl $foo, %reg2. */
2711 BFD_ASSERT (rel
->r_offset
>= 2);
2712 type
= bfd_get_8 (input_bfd
, contents
+ rel
->r_offset
- 2);
2713 val
= bfd_get_8 (input_bfd
, contents
+ rel
->r_offset
- 1);
2714 BFD_ASSERT (rel
->r_offset
+ 4 <= input_section
->size
);
2715 BFD_ASSERT ((val
& 0xc0) == 0x80 && (val
& 7) != 4);
2719 bfd_put_8 (output_bfd
, 0xc7,
2720 contents
+ rel
->r_offset
- 2);
2721 bfd_put_8 (output_bfd
, 0xc0 | ((val
>> 3) & 7),
2722 contents
+ rel
->r_offset
- 1);
2724 else if (type
== 0x2b)
2727 bfd_put_8 (output_bfd
, 0x81,
2728 contents
+ rel
->r_offset
- 2);
2729 bfd_put_8 (output_bfd
, 0xe8 | ((val
>> 3) & 7),
2730 contents
+ rel
->r_offset
- 1);
2732 else if (type
== 0x03)
2735 bfd_put_8 (output_bfd
, 0x81,
2736 contents
+ rel
->r_offset
- 2);
2737 bfd_put_8 (output_bfd
, 0xc0 | ((val
>> 3) & 7),
2738 contents
+ rel
->r_offset
- 1);
2742 if (ELF32_R_TYPE (rel
->r_info
) == R_386_TLS_GOTIE
)
2743 bfd_put_32 (output_bfd
, -tpoff (info
, relocation
),
2744 contents
+ rel
->r_offset
);
2746 bfd_put_32 (output_bfd
, tpoff (info
, relocation
),
2747 contents
+ rel
->r_offset
);
2752 if (htab
->sgot
== NULL
)
2756 off
= h
->got
.offset
;
2759 if (local_got_offsets
== NULL
)
2762 off
= local_got_offsets
[r_symndx
];
2769 Elf_Internal_Rela outrel
;
2773 if (htab
->srelgot
== NULL
)
2776 outrel
.r_offset
= (htab
->sgot
->output_section
->vma
2777 + htab
->sgot
->output_offset
+ off
);
2779 indx
= h
&& h
->dynindx
!= -1 ? h
->dynindx
: 0;
2780 if (r_type
== R_386_TLS_GD
)
2781 dr_type
= R_386_TLS_DTPMOD32
;
2782 else if (tls_type
== GOT_TLS_IE_POS
)
2783 dr_type
= R_386_TLS_TPOFF
;
2785 dr_type
= R_386_TLS_TPOFF32
;
2786 if (dr_type
== R_386_TLS_TPOFF
&& indx
== 0)
2787 bfd_put_32 (output_bfd
, relocation
- dtpoff_base (info
),
2788 htab
->sgot
->contents
+ off
);
2789 else if (dr_type
== R_386_TLS_TPOFF32
&& indx
== 0)
2790 bfd_put_32 (output_bfd
, dtpoff_base (info
) - relocation
,
2791 htab
->sgot
->contents
+ off
);
2793 bfd_put_32 (output_bfd
, 0,
2794 htab
->sgot
->contents
+ off
);
2795 outrel
.r_info
= ELF32_R_INFO (indx
, dr_type
);
2796 loc
= htab
->srelgot
->contents
;
2797 loc
+= htab
->srelgot
->reloc_count
++ * sizeof (Elf32_External_Rel
);
2798 bfd_elf32_swap_reloc_out (output_bfd
, &outrel
, loc
);
2800 if (r_type
== R_386_TLS_GD
)
2804 BFD_ASSERT (! unresolved_reloc
);
2805 bfd_put_32 (output_bfd
,
2806 relocation
- dtpoff_base (info
),
2807 htab
->sgot
->contents
+ off
+ 4);
2811 bfd_put_32 (output_bfd
, 0,
2812 htab
->sgot
->contents
+ off
+ 4);
2813 outrel
.r_info
= ELF32_R_INFO (indx
,
2814 R_386_TLS_DTPOFF32
);
2815 outrel
.r_offset
+= 4;
2816 htab
->srelgot
->reloc_count
++;
2817 loc
+= sizeof (Elf32_External_Rel
);
2818 bfd_elf32_swap_reloc_out (output_bfd
, &outrel
, loc
);
2821 else if (tls_type
== GOT_TLS_IE_BOTH
)
2823 bfd_put_32 (output_bfd
,
2824 indx
== 0 ? relocation
- dtpoff_base (info
) : 0,
2825 htab
->sgot
->contents
+ off
+ 4);
2826 outrel
.r_info
= ELF32_R_INFO (indx
, R_386_TLS_TPOFF
);
2827 outrel
.r_offset
+= 4;
2828 htab
->srelgot
->reloc_count
++;
2829 loc
+= sizeof (Elf32_External_Rel
);
2830 bfd_elf32_swap_reloc_out (output_bfd
, &outrel
, loc
);
2836 local_got_offsets
[r_symndx
] |= 1;
2839 if (off
>= (bfd_vma
) -2)
2841 if (r_type
== ELF32_R_TYPE (rel
->r_info
))
2843 bfd_vma g_o_t
= htab
->sgotplt
->output_section
->vma
2844 + htab
->sgotplt
->output_offset
;
2845 relocation
= htab
->sgot
->output_section
->vma
2846 + htab
->sgot
->output_offset
+ off
- g_o_t
;
2847 if ((r_type
== R_386_TLS_IE
|| r_type
== R_386_TLS_GOTIE
)
2848 && tls_type
== GOT_TLS_IE_BOTH
)
2850 if (r_type
== R_386_TLS_IE
)
2851 relocation
+= g_o_t
;
2852 unresolved_reloc
= FALSE
;
2856 unsigned int val
, type
;
2859 /* GD->IE transition. */
2860 BFD_ASSERT (rel
->r_offset
>= 2);
2861 type
= bfd_get_8 (input_bfd
, contents
+ rel
->r_offset
- 2);
2862 BFD_ASSERT (type
== 0x8d || type
== 0x04);
2863 BFD_ASSERT (rel
->r_offset
+ 9 <= input_section
->size
);
2864 BFD_ASSERT (bfd_get_8 (input_bfd
, contents
+ rel
->r_offset
+ 4)
2866 BFD_ASSERT (rel
+ 1 < relend
);
2867 BFD_ASSERT (ELF32_R_TYPE (rel
[1].r_info
) == R_386_PLT32
);
2868 roff
= rel
->r_offset
- 3;
2869 val
= bfd_get_8 (input_bfd
, contents
+ rel
->r_offset
- 1);
2872 /* leal foo(,%reg,1), %eax; call ___tls_get_addr
2874 movl %gs:0, %eax; subl $foo@gottpoff(%reg), %eax. */
2875 BFD_ASSERT (rel
->r_offset
>= 3);
2876 BFD_ASSERT (bfd_get_8 (input_bfd
,
2877 contents
+ rel
->r_offset
- 3)
2879 BFD_ASSERT ((val
& 0xc7) == 0x05 && val
!= (4 << 3));
2884 /* leal foo(%reg), %eax; call ___tls_get_addr; nop
2886 movl %gs:0, %eax; subl $foo@gottpoff(%reg), %eax. */
2887 BFD_ASSERT (rel
->r_offset
+ 10 <= input_section
->size
);
2888 BFD_ASSERT ((val
& 0xf8) == 0x80 && (val
& 7) != 4);
2889 BFD_ASSERT (bfd_get_8 (input_bfd
,
2890 contents
+ rel
->r_offset
+ 9)
2892 roff
= rel
->r_offset
- 2;
2894 memcpy (contents
+ roff
,
2895 "\x65\xa1\0\0\0\0\x2b\x80\0\0\0", 12);
2896 contents
[roff
+ 7] = 0x80 | (val
& 7);
2897 /* If foo is used only with foo@gotntpoff(%reg) and
2898 foo@indntpoff, but not with foo@gottpoff(%reg), change
2899 subl $foo@gottpoff(%reg), %eax
2901 addl $foo@gotntpoff(%reg), %eax. */
2902 if (r_type
== R_386_TLS_GOTIE
)
2904 contents
[roff
+ 6] = 0x03;
2905 if (tls_type
== GOT_TLS_IE_BOTH
)
2908 bfd_put_32 (output_bfd
,
2909 htab
->sgot
->output_section
->vma
2910 + htab
->sgot
->output_offset
+ off
2911 - htab
->sgotplt
->output_section
->vma
2912 - htab
->sgotplt
->output_offset
,
2913 contents
+ roff
+ 8);
2914 /* Skip R_386_PLT32. */
2925 /* LD->LE transition:
2927 leal foo(%reg), %eax; call ___tls_get_addr.
2929 movl %gs:0, %eax; nop; leal 0(%esi,1), %esi. */
2930 BFD_ASSERT (rel
->r_offset
>= 2);
2931 BFD_ASSERT (bfd_get_8 (input_bfd
, contents
+ rel
->r_offset
- 2)
2933 val
= bfd_get_8 (input_bfd
, contents
+ rel
->r_offset
- 1);
2934 BFD_ASSERT ((val
& 0xf8) == 0x80 && (val
& 7) != 4);
2935 BFD_ASSERT (rel
->r_offset
+ 9 <= input_section
->size
);
2936 BFD_ASSERT (bfd_get_8 (input_bfd
, contents
+ rel
->r_offset
+ 4)
2938 BFD_ASSERT (rel
+ 1 < relend
);
2939 BFD_ASSERT (ELF32_R_TYPE (rel
[1].r_info
) == R_386_PLT32
);
2940 memcpy (contents
+ rel
->r_offset
- 2,
2941 "\x65\xa1\0\0\0\0\x90\x8d\x74\x26", 11);
2942 /* Skip R_386_PLT32. */
2947 if (htab
->sgot
== NULL
)
2950 off
= htab
->tls_ldm_got
.offset
;
2955 Elf_Internal_Rela outrel
;
2958 if (htab
->srelgot
== NULL
)
2961 outrel
.r_offset
= (htab
->sgot
->output_section
->vma
2962 + htab
->sgot
->output_offset
+ off
);
2964 bfd_put_32 (output_bfd
, 0,
2965 htab
->sgot
->contents
+ off
);
2966 bfd_put_32 (output_bfd
, 0,
2967 htab
->sgot
->contents
+ off
+ 4);
2968 outrel
.r_info
= ELF32_R_INFO (0, R_386_TLS_DTPMOD32
);
2969 loc
= htab
->srelgot
->contents
;
2970 loc
+= htab
->srelgot
->reloc_count
++ * sizeof (Elf32_External_Rel
);
2971 bfd_elf32_swap_reloc_out (output_bfd
, &outrel
, loc
);
2972 htab
->tls_ldm_got
.offset
|= 1;
2974 relocation
= htab
->sgot
->output_section
->vma
2975 + htab
->sgot
->output_offset
+ off
2976 - htab
->sgotplt
->output_section
->vma
2977 - htab
->sgotplt
->output_offset
;
2978 unresolved_reloc
= FALSE
;
2981 case R_386_TLS_LDO_32
:
2982 if (info
->shared
|| (input_section
->flags
& SEC_CODE
) == 0)
2983 relocation
-= dtpoff_base (info
);
2985 /* When converting LDO to LE, we must negate. */
2986 relocation
= -tpoff (info
, relocation
);
2989 case R_386_TLS_LE_32
:
2993 Elf_Internal_Rela outrel
;
2998 outrel
.r_offset
= rel
->r_offset
2999 + input_section
->output_section
->vma
3000 + input_section
->output_offset
;
3001 if (h
!= NULL
&& h
->dynindx
!= -1)
3005 if (r_type
== R_386_TLS_LE_32
)
3006 outrel
.r_info
= ELF32_R_INFO (indx
, R_386_TLS_TPOFF32
);
3008 outrel
.r_info
= ELF32_R_INFO (indx
, R_386_TLS_TPOFF
);
3009 sreloc
= elf_section_data (input_section
)->sreloc
;
3012 loc
= sreloc
->contents
;
3013 loc
+= sreloc
->reloc_count
++ * sizeof (Elf32_External_Rel
);
3014 bfd_elf32_swap_reloc_out (output_bfd
, &outrel
, loc
);
3017 else if (r_type
== R_386_TLS_LE_32
)
3018 relocation
= dtpoff_base (info
) - relocation
;
3020 relocation
-= dtpoff_base (info
);
3022 else if (r_type
== R_386_TLS_LE_32
)
3023 relocation
= tpoff (info
, relocation
);
3025 relocation
= -tpoff (info
, relocation
);
3032 /* Dynamic relocs are not propagated for SEC_DEBUGGING sections
3033 because such sections are not SEC_ALLOC and thus ld.so will
3034 not process them. */
3035 if (unresolved_reloc
3036 && !((input_section
->flags
& SEC_DEBUGGING
) != 0
3039 (*_bfd_error_handler
)
3040 (_("%B(%A+0x%lx): unresolvable relocation against symbol `%s'"),
3043 (long) rel
->r_offset
,
3044 h
->root
.root
.string
);
3048 r
= _bfd_final_link_relocate (howto
, input_bfd
, input_section
,
3049 contents
, rel
->r_offset
,
3052 if (r
!= bfd_reloc_ok
)
3057 name
= h
->root
.root
.string
;
3060 name
= bfd_elf_string_from_elf_section (input_bfd
,
3061 symtab_hdr
->sh_link
,
3066 name
= bfd_section_name (input_bfd
, sec
);
3069 if (r
== bfd_reloc_overflow
)
3071 if (! ((*info
->callbacks
->reloc_overflow
)
3072 (info
, (h
? &h
->root
: NULL
), name
, howto
->name
,
3073 (bfd_vma
) 0, input_bfd
, input_section
,
3079 (*_bfd_error_handler
)
3080 (_("%B(%A+0x%lx): reloc against `%s': error %d"),
3081 input_bfd
, input_section
,
3082 (long) rel
->r_offset
, name
, (int) r
);
3091 /* Finish up dynamic symbol handling. We set the contents of various
3092 dynamic sections here. */
3095 elf_i386_finish_dynamic_symbol (bfd
*output_bfd
,
3096 struct bfd_link_info
*info
,
3097 struct elf_link_hash_entry
*h
,
3098 Elf_Internal_Sym
*sym
)
3100 struct elf_i386_link_hash_table
*htab
;
3102 htab
= elf_i386_hash_table (info
);
3104 if (h
->plt
.offset
!= (bfd_vma
) -1)
3108 Elf_Internal_Rela rel
;
3111 /* This symbol has an entry in the procedure linkage table. Set
3114 if (h
->dynindx
== -1
3115 || htab
->splt
== NULL
3116 || htab
->sgotplt
== NULL
3117 || htab
->srelplt
== NULL
)
3120 /* Get the index in the procedure linkage table which
3121 corresponds to this symbol. This is the index of this symbol
3122 in all the symbols for which we are making plt entries. The
3123 first entry in the procedure linkage table is reserved. */
3124 plt_index
= h
->plt
.offset
/ PLT_ENTRY_SIZE
- 1;
3126 /* Get the offset into the .got table of the entry that
3127 corresponds to this function. Each .got entry is 4 bytes.
3128 The first three are reserved. */
3129 got_offset
= (plt_index
+ 3) * 4;
3131 /* Fill in the entry in the procedure linkage table. */
3134 memcpy (htab
->splt
->contents
+ h
->plt
.offset
, elf_i386_plt_entry
,
3136 bfd_put_32 (output_bfd
,
3137 (htab
->sgotplt
->output_section
->vma
3138 + htab
->sgotplt
->output_offset
3140 htab
->splt
->contents
+ h
->plt
.offset
+ 2);
3142 if (htab
->is_vxworks
)
3144 int s
, k
, reloc_index
;
3146 /* Create the R_386_32 relocation referencing the GOT
3147 for this PLT entry. */
3149 /* S: Current slot number (zero-based). */
3150 s
= (h
->plt
.offset
- PLT_ENTRY_SIZE
) / PLT_ENTRY_SIZE
;
3151 /* K: Number of relocations for PLTResolve. */
3153 k
= PLTRESOLVE_RELOCS_SHLIB
;
3155 k
= PLTRESOLVE_RELOCS
;
3156 /* Skip the PLTresolve relocations, and the relocations for
3157 the other PLT slots. */
3158 reloc_index
= k
+ s
* PLT_NON_JUMP_SLOT_RELOCS
;
3159 loc
= (htab
->srelplt2
->contents
+ reloc_index
3160 * sizeof (Elf32_External_Rel
));
3162 rel
.r_offset
= (htab
->splt
->output_section
->vma
3163 + htab
->splt
->output_offset
3164 + h
->plt
.offset
+ 2),
3165 rel
.r_info
= ELF32_R_INFO (htab
->hgot
->indx
, R_386_32
);
3166 bfd_elf32_swap_reloc_out (output_bfd
, &rel
, loc
);
3168 /* Create the R_386_32 relocation referencing the beginning of
3169 the PLT for this GOT entry. */
3170 rel
.r_offset
= (htab
->sgotplt
->output_section
->vma
3171 + htab
->sgotplt
->output_offset
3173 rel
.r_info
= ELF32_R_INFO (htab
->hplt
->indx
, R_386_32
);
3174 bfd_elf32_swap_reloc_out (output_bfd
, &rel
,
3175 loc
+ sizeof (Elf32_External_Rel
));
3180 memcpy (htab
->splt
->contents
+ h
->plt
.offset
, elf_i386_pic_plt_entry
,
3182 bfd_put_32 (output_bfd
, got_offset
,
3183 htab
->splt
->contents
+ h
->plt
.offset
+ 2);
3186 bfd_put_32 (output_bfd
, plt_index
* sizeof (Elf32_External_Rel
),
3187 htab
->splt
->contents
+ h
->plt
.offset
+ 7);
3188 bfd_put_32 (output_bfd
, - (h
->plt
.offset
+ PLT_ENTRY_SIZE
),
3189 htab
->splt
->contents
+ h
->plt
.offset
+ 12);
3191 /* Fill in the entry in the global offset table. */
3192 bfd_put_32 (output_bfd
,
3193 (htab
->splt
->output_section
->vma
3194 + htab
->splt
->output_offset
3197 htab
->sgotplt
->contents
+ got_offset
);
3199 /* Fill in the entry in the .rel.plt section. */
3200 rel
.r_offset
= (htab
->sgotplt
->output_section
->vma
3201 + htab
->sgotplt
->output_offset
3203 rel
.r_info
= ELF32_R_INFO (h
->dynindx
, R_386_JUMP_SLOT
);
3204 loc
= htab
->srelplt
->contents
+ plt_index
* sizeof (Elf32_External_Rel
);
3205 bfd_elf32_swap_reloc_out (output_bfd
, &rel
, loc
);
3207 if (!h
->def_regular
)
3209 /* Mark the symbol as undefined, rather than as defined in
3210 the .plt section. Leave the value if there were any
3211 relocations where pointer equality matters (this is a clue
3212 for the dynamic linker, to make function pointer
3213 comparisons work between an application and shared
3214 library), otherwise set it to zero. If a function is only
3215 called from a binary, there is no need to slow down
3216 shared libraries because of that. */
3217 sym
->st_shndx
= SHN_UNDEF
;
3218 if (!h
->pointer_equality_needed
)
3223 if (h
->got
.offset
!= (bfd_vma
) -1
3224 && elf_i386_hash_entry(h
)->tls_type
!= GOT_TLS_GD
3225 && (elf_i386_hash_entry(h
)->tls_type
& GOT_TLS_IE
) == 0)
3227 Elf_Internal_Rela rel
;
3230 /* This symbol has an entry in the global offset table. Set it
3233 if (htab
->sgot
== NULL
|| htab
->srelgot
== NULL
)
3236 rel
.r_offset
= (htab
->sgot
->output_section
->vma
3237 + htab
->sgot
->output_offset
3238 + (h
->got
.offset
& ~(bfd_vma
) 1));
3240 /* If this is a static link, or it is a -Bsymbolic link and the
3241 symbol is defined locally or was forced to be local because
3242 of a version file, we just want to emit a RELATIVE reloc.
3243 The entry in the global offset table will already have been
3244 initialized in the relocate_section function. */
3246 && SYMBOL_REFERENCES_LOCAL (info
, h
))
3248 BFD_ASSERT((h
->got
.offset
& 1) != 0);
3249 rel
.r_info
= ELF32_R_INFO (0, R_386_RELATIVE
);
3253 BFD_ASSERT((h
->got
.offset
& 1) == 0);
3254 bfd_put_32 (output_bfd
, (bfd_vma
) 0,
3255 htab
->sgot
->contents
+ h
->got
.offset
);
3256 rel
.r_info
= ELF32_R_INFO (h
->dynindx
, R_386_GLOB_DAT
);
3259 loc
= htab
->srelgot
->contents
;
3260 loc
+= htab
->srelgot
->reloc_count
++ * sizeof (Elf32_External_Rel
);
3261 bfd_elf32_swap_reloc_out (output_bfd
, &rel
, loc
);
3266 Elf_Internal_Rela rel
;
3269 /* This symbol needs a copy reloc. Set it up. */
3271 if (h
->dynindx
== -1
3272 || (h
->root
.type
!= bfd_link_hash_defined
3273 && h
->root
.type
!= bfd_link_hash_defweak
)
3274 || htab
->srelbss
== NULL
)
3277 rel
.r_offset
= (h
->root
.u
.def
.value
3278 + h
->root
.u
.def
.section
->output_section
->vma
3279 + h
->root
.u
.def
.section
->output_offset
);
3280 rel
.r_info
= ELF32_R_INFO (h
->dynindx
, R_386_COPY
);
3281 loc
= htab
->srelbss
->contents
;
3282 loc
+= htab
->srelbss
->reloc_count
++ * sizeof (Elf32_External_Rel
);
3283 bfd_elf32_swap_reloc_out (output_bfd
, &rel
, loc
);
3286 /* Mark _DYNAMIC and _GLOBAL_OFFSET_TABLE_ as absolute.
3287 On VxWorks, the _GLOBAL_OFFSET_TABLE_ symbol is not absolute: it
3288 is relative to the ".got" section. */
3289 if (strcmp (h
->root
.root
.string
, "_DYNAMIC") == 0
3290 || (strcmp (h
->root
.root
.string
, "_GLOBAL_OFFSET_TABLE_") == 0
3291 && !htab
->is_vxworks
))
3292 sym
->st_shndx
= SHN_ABS
;
3297 /* Used to decide how to sort relocs in an optimal manner for the
3298 dynamic linker, before writing them out. */
3300 static enum elf_reloc_type_class
3301 elf_i386_reloc_type_class (const Elf_Internal_Rela
*rela
)
3303 switch (ELF32_R_TYPE (rela
->r_info
))
3305 case R_386_RELATIVE
:
3306 return reloc_class_relative
;
3307 case R_386_JUMP_SLOT
:
3308 return reloc_class_plt
;
3310 return reloc_class_copy
;
3312 return reloc_class_normal
;
3316 /* Finish up the dynamic sections. */
3319 elf_i386_finish_dynamic_sections (bfd
*output_bfd
,
3320 struct bfd_link_info
*info
)
3322 struct elf_i386_link_hash_table
*htab
;
3326 htab
= elf_i386_hash_table (info
);
3327 dynobj
= htab
->elf
.dynobj
;
3328 sdyn
= bfd_get_section_by_name (dynobj
, ".dynamic");
3330 if (htab
->elf
.dynamic_sections_created
)
3332 Elf32_External_Dyn
*dyncon
, *dynconend
;
3334 if (sdyn
== NULL
|| htab
->sgot
== NULL
)
3337 dyncon
= (Elf32_External_Dyn
*) sdyn
->contents
;
3338 dynconend
= (Elf32_External_Dyn
*) (sdyn
->contents
+ sdyn
->size
);
3339 for (; dyncon
< dynconend
; dyncon
++)
3341 Elf_Internal_Dyn dyn
;
3344 bfd_elf32_swap_dyn_in (dynobj
, dyncon
, &dyn
);
3353 dyn
.d_un
.d_ptr
= s
->output_section
->vma
+ s
->output_offset
;
3358 dyn
.d_un
.d_ptr
= s
->output_section
->vma
+ s
->output_offset
;
3363 dyn
.d_un
.d_val
= s
->size
;
3367 /* My reading of the SVR4 ABI indicates that the
3368 procedure linkage table relocs (DT_JMPREL) should be
3369 included in the overall relocs (DT_REL). This is
3370 what Solaris does. However, UnixWare can not handle
3371 that case. Therefore, we override the DT_RELSZ entry
3372 here to make it not include the JMPREL relocs. */
3376 dyn
.d_un
.d_val
-= s
->size
;
3380 /* We may not be using the standard ELF linker script.
3381 If .rel.plt is the first .rel section, we adjust
3382 DT_REL to not include it. */
3386 if (dyn
.d_un
.d_ptr
!= s
->output_section
->vma
+ s
->output_offset
)
3388 dyn
.d_un
.d_ptr
+= s
->size
;
3392 bfd_elf32_swap_dyn_out (output_bfd
, &dyn
, dyncon
);
3395 /* Fill in the first entry in the procedure linkage table. */
3396 if (htab
->splt
&& htab
->splt
->size
> 0)
3400 memcpy (htab
->splt
->contents
, elf_i386_pic_plt0_entry
,
3401 sizeof (elf_i386_pic_plt0_entry
));
3402 memset (htab
->splt
->contents
+ sizeof (elf_i386_pic_plt0_entry
),
3403 htab
->plt0_pad_byte
,
3404 PLT_ENTRY_SIZE
- sizeof (elf_i386_pic_plt0_entry
));
3408 memcpy (htab
->splt
->contents
, elf_i386_plt0_entry
,
3409 sizeof(elf_i386_plt0_entry
));
3410 memset (htab
->splt
->contents
+ sizeof (elf_i386_plt0_entry
),
3411 htab
->plt0_pad_byte
,
3412 PLT_ENTRY_SIZE
- sizeof (elf_i386_plt0_entry
));
3413 bfd_put_32 (output_bfd
,
3414 (htab
->sgotplt
->output_section
->vma
3415 + htab
->sgotplt
->output_offset
3417 htab
->splt
->contents
+ 2);
3418 bfd_put_32 (output_bfd
,
3419 (htab
->sgotplt
->output_section
->vma
3420 + htab
->sgotplt
->output_offset
3422 htab
->splt
->contents
+ 8);
3424 if (htab
->is_vxworks
)
3426 Elf_Internal_Rela rel
;
3427 struct elf_link_hash_entry
*hgot
;
3429 /* The VxWorks GOT is relocated by the dynamic linker.
3430 Therefore, we must emit relocations rather than
3431 simply computing the values now. */
3432 hgot
= elf_link_hash_lookup (elf_hash_table (info
),
3433 "_GLOBAL_OFFSET_TABLE_",
3434 FALSE
, FALSE
, FALSE
);
3435 /* Generate a relocation for _GLOBAL_OFFSET_TABLE_ + 4.
3436 On IA32 we use REL relocations so the addend goes in
3437 the PLT directly. */
3438 rel
.r_offset
= (htab
->splt
->output_section
->vma
3439 + htab
->splt
->output_offset
3441 rel
.r_info
= ELF32_R_INFO (hgot
->indx
, R_386_32
);
3442 bfd_elf32_swap_reloc_out (output_bfd
, &rel
,
3443 htab
->srelplt2
->contents
);
3444 /* Generate a relocation for _GLOBAL_OFFSET_TABLE_ + 8. */
3445 rel
.r_offset
= (htab
->splt
->output_section
->vma
3446 + htab
->splt
->output_offset
3448 rel
.r_info
= ELF32_R_INFO (hgot
->indx
, R_386_32
);
3449 bfd_elf32_swap_reloc_out (output_bfd
, &rel
,
3450 htab
->srelplt2
->contents
+
3451 sizeof (Elf32_External_Rel
));
3455 /* UnixWare sets the entsize of .plt to 4, although that doesn't
3456 really seem like the right value. */
3457 elf_section_data (htab
->splt
->output_section
)
3458 ->this_hdr
.sh_entsize
= 4;
3460 /* Correct the .rel.plt.unloaded relocations. */
3461 if (htab
->is_vxworks
&& !info
->shared
)
3463 int num_plts
= (htab
->splt
->size
/ PLT_ENTRY_SIZE
) - 1;
3466 p
= htab
->srelplt2
->contents
;
3468 p
+= PLTRESOLVE_RELOCS_SHLIB
* sizeof (Elf32_External_Rel
);
3470 p
+= PLTRESOLVE_RELOCS
* sizeof (Elf32_External_Rel
);
3472 for (; num_plts
; num_plts
--)
3474 Elf_Internal_Rela rel
;
3475 bfd_elf32_swap_reloc_in (output_bfd
, p
, &rel
);
3476 rel
.r_info
= ELF32_R_INFO (htab
->hgot
->indx
, R_386_32
);
3477 bfd_elf32_swap_reloc_out (output_bfd
, &rel
, p
);
3478 p
+= sizeof (Elf32_External_Rel
);
3480 bfd_elf32_swap_reloc_in (output_bfd
, p
, &rel
);
3481 rel
.r_info
= ELF32_R_INFO (htab
->hplt
->indx
, R_386_32
);
3482 bfd_elf32_swap_reloc_out (output_bfd
, &rel
, p
);
3483 p
+= sizeof (Elf32_External_Rel
);
3491 /* Fill in the first three entries in the global offset table. */
3492 if (htab
->sgotplt
->size
> 0)
3494 bfd_put_32 (output_bfd
,
3496 : sdyn
->output_section
->vma
+ sdyn
->output_offset
),
3497 htab
->sgotplt
->contents
);
3498 bfd_put_32 (output_bfd
, 0, htab
->sgotplt
->contents
+ 4);
3499 bfd_put_32 (output_bfd
, 0, htab
->sgotplt
->contents
+ 8);
3502 elf_section_data (htab
->sgotplt
->output_section
)->this_hdr
.sh_entsize
= 4;
3505 if (htab
->sgot
&& htab
->sgot
->size
> 0)
3506 elf_section_data (htab
->sgot
->output_section
)->this_hdr
.sh_entsize
= 4;
3511 /* Return address for Ith PLT stub in section PLT, for relocation REL
3512 or (bfd_vma) -1 if it should not be included. */
3515 elf_i386_plt_sym_val (bfd_vma i
, const asection
*plt
,
3516 const arelent
*rel ATTRIBUTE_UNUSED
)
3518 return plt
->vma
+ (i
+ 1) * PLT_ENTRY_SIZE
;
3522 #define TARGET_LITTLE_SYM bfd_elf32_i386_vec
3523 #define TARGET_LITTLE_NAME "elf32-i386"
3524 #define ELF_ARCH bfd_arch_i386
3525 #define ELF_MACHINE_CODE EM_386
3526 #define ELF_MAXPAGESIZE 0x1000
3528 #define elf_backend_can_gc_sections 1
3529 #define elf_backend_can_refcount 1
3530 #define elf_backend_want_got_plt 1
3531 #define elf_backend_plt_readonly 1
3532 #define elf_backend_want_plt_sym 0
3533 #define elf_backend_got_header_size 12
3535 /* Support RELA for objdump of prelink objects. */
3536 #define elf_info_to_howto elf_i386_info_to_howto_rel
3537 #define elf_info_to_howto_rel elf_i386_info_to_howto_rel
3539 #define bfd_elf32_mkobject elf_i386_mkobject
3541 #define bfd_elf32_bfd_is_local_label_name elf_i386_is_local_label_name
3542 #define bfd_elf32_bfd_link_hash_table_create elf_i386_link_hash_table_create
3543 #define bfd_elf32_bfd_reloc_type_lookup elf_i386_reloc_type_lookup
3545 #define elf_backend_adjust_dynamic_symbol elf_i386_adjust_dynamic_symbol
3546 #define elf_backend_check_relocs elf_i386_check_relocs
3547 #define elf_backend_copy_indirect_symbol elf_i386_copy_indirect_symbol
3548 #define elf_backend_create_dynamic_sections elf_i386_create_dynamic_sections
3549 #define elf_backend_fake_sections elf_i386_fake_sections
3550 #define elf_backend_finish_dynamic_sections elf_i386_finish_dynamic_sections
3551 #define elf_backend_finish_dynamic_symbol elf_i386_finish_dynamic_symbol
3552 #define elf_backend_gc_mark_hook elf_i386_gc_mark_hook
3553 #define elf_backend_gc_sweep_hook elf_i386_gc_sweep_hook
3554 #define elf_backend_grok_prstatus elf_i386_grok_prstatus
3555 #define elf_backend_grok_psinfo elf_i386_grok_psinfo
3556 #define elf_backend_reloc_type_class elf_i386_reloc_type_class
3557 #define elf_backend_relocate_section elf_i386_relocate_section
3558 #define elf_backend_size_dynamic_sections elf_i386_size_dynamic_sections
3559 #define elf_backend_plt_sym_val elf_i386_plt_sym_val
3561 #include "elf32-target.h"
3563 /* FreeBSD support. */
3565 #undef TARGET_LITTLE_SYM
3566 #define TARGET_LITTLE_SYM bfd_elf32_i386_freebsd_vec
3567 #undef TARGET_LITTLE_NAME
3568 #define TARGET_LITTLE_NAME "elf32-i386-freebsd"
3570 /* The kernel recognizes executables as valid only if they carry a
3571 "FreeBSD" label in the ELF header. So we put this label on all
3572 executables and (for simplicity) also all other object files. */
3575 elf_i386_post_process_headers (bfd
*abfd
,
3576 struct bfd_link_info
*info ATTRIBUTE_UNUSED
)
3578 Elf_Internal_Ehdr
*i_ehdrp
;
3580 i_ehdrp
= elf_elfheader (abfd
);
3582 /* Put an ABI label supported by FreeBSD >= 4.1. */
3583 i_ehdrp
->e_ident
[EI_OSABI
] = ELFOSABI_FREEBSD
;
3584 #ifdef OLD_FREEBSD_ABI_LABEL
3585 /* The ABI label supported by FreeBSD <= 4.0 is quite nonstandard. */
3586 memcpy (&i_ehdrp
->e_ident
[EI_ABIVERSION
], "FreeBSD", 8);
3590 #undef elf_backend_post_process_headers
3591 #define elf_backend_post_process_headers elf_i386_post_process_headers
3593 #define elf32_bed elf32_i386_fbsd_bed
3595 #include "elf32-target.h"
3597 /* VxWorks support. */
3599 #undef TARGET_LITTLE_SYM
3600 #define TARGET_LITTLE_SYM bfd_elf32_i386_vxworks_vec
3601 #undef TARGET_LITTLE_NAME
3602 #define TARGET_LITTLE_NAME "elf32-i386-vxworks"
3605 /* Like elf_i386_link_hash_table_create but with tweaks for VxWorks. */
3607 static struct bfd_link_hash_table
*
3608 elf_i386_vxworks_link_hash_table_create (bfd
*abfd
)
3610 struct bfd_link_hash_table
*ret
;
3611 struct elf_i386_link_hash_table
*htab
;
3613 ret
= elf_i386_link_hash_table_create (abfd
);
3616 htab
= (struct elf_i386_link_hash_table
*) ret
;
3617 htab
->is_vxworks
= 1;
3618 htab
->plt0_pad_byte
= 0x90;
3625 /* Tweak magic VxWorks symbols as they are written to the output file. */
3627 elf_i386_vxworks_link_output_symbol_hook (struct bfd_link_info
*info
3630 Elf_Internal_Sym
*sym
,
3631 asection
*input_sec ATTRIBUTE_UNUSED
,
3632 struct elf_link_hash_entry
*h
3635 /* Ignore the first dummy symbol. */
3639 return elf_vxworks_link_output_symbol_hook (name
, sym
);
3642 #undef elf_backend_post_process_headers
3643 #undef bfd_elf32_bfd_link_hash_table_create
3644 #define bfd_elf32_bfd_link_hash_table_create \
3645 elf_i386_vxworks_link_hash_table_create
3646 #undef elf_backend_add_symbol_hook
3647 #define elf_backend_add_symbol_hook \
3648 elf_vxworks_add_symbol_hook
3649 #undef elf_backend_link_output_symbol_hook
3650 #define elf_backend_link_output_symbol_hook \
3651 elf_i386_vxworks_link_output_symbol_hook
3652 #undef elf_backend_emit_relocs
3653 #define elf_backend_emit_relocs elf_vxworks_emit_relocs
3654 #undef elf_backend_final_write_processing
3655 #define elf_backend_final_write_processing \
3656 elf_vxworks_final_write_processing
3658 /* On VxWorks, we emit relocations against _PROCEDURE_LINKAGE_TABLE_, so
3660 #undef elf_backend_want_plt_sym
3661 #define elf_backend_want_plt_sym 1
3664 #define elf32_bed elf32_i386_vxworks_bed
3666 #include "elf32-target.h"