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
)
914 h
= sym_hashes
[r_symndx
- symtab_hdr
->sh_info
];
916 r_type
= elf_i386_tls_transition (info
, r_type
, h
== NULL
);
921 htab
->tls_ldm_got
.refcount
+= 1;
925 /* This symbol requires a procedure linkage table entry. We
926 actually build the entry in adjust_dynamic_symbol,
927 because this might be a case of linking PIC code which is
928 never referenced by a dynamic object, in which case we
929 don't need to generate a procedure linkage table entry
932 /* If this is a local symbol, we resolve it directly without
933 creating a procedure linkage table entry. */
938 h
->plt
.refcount
+= 1;
941 case R_386_TLS_IE_32
:
943 case R_386_TLS_GOTIE
:
945 info
->flags
|= DF_STATIC_TLS
;
950 /* This symbol requires a global offset table entry. */
952 int tls_type
, old_tls_type
;
957 case R_386_GOT32
: tls_type
= GOT_NORMAL
; break;
958 case R_386_TLS_GD
: tls_type
= GOT_TLS_GD
; break;
959 case R_386_TLS_IE_32
:
960 if (ELF32_R_TYPE (rel
->r_info
) == r_type
)
961 tls_type
= GOT_TLS_IE_NEG
;
963 /* If this is a GD->IE transition, we may use either of
964 R_386_TLS_TPOFF and R_386_TLS_TPOFF32. */
965 tls_type
= GOT_TLS_IE
;
968 case R_386_TLS_GOTIE
:
969 tls_type
= GOT_TLS_IE_POS
; break;
974 h
->got
.refcount
+= 1;
975 old_tls_type
= elf_i386_hash_entry(h
)->tls_type
;
979 bfd_signed_vma
*local_got_refcounts
;
981 /* This is a global offset table entry for a local symbol. */
982 local_got_refcounts
= elf_local_got_refcounts (abfd
);
983 if (local_got_refcounts
== NULL
)
987 size
= symtab_hdr
->sh_info
;
988 size
*= (sizeof (bfd_signed_vma
) + sizeof(char));
989 local_got_refcounts
= bfd_zalloc (abfd
, size
);
990 if (local_got_refcounts
== NULL
)
992 elf_local_got_refcounts (abfd
) = local_got_refcounts
;
993 elf_i386_local_got_tls_type (abfd
)
994 = (char *) (local_got_refcounts
+ symtab_hdr
->sh_info
);
996 local_got_refcounts
[r_symndx
] += 1;
997 old_tls_type
= elf_i386_local_got_tls_type (abfd
) [r_symndx
];
1000 if ((old_tls_type
& GOT_TLS_IE
) && (tls_type
& GOT_TLS_IE
))
1001 tls_type
|= old_tls_type
;
1002 /* If a TLS symbol is accessed using IE at least once,
1003 there is no point to use dynamic model for it. */
1004 else if (old_tls_type
!= tls_type
&& old_tls_type
!= GOT_UNKNOWN
1005 && (old_tls_type
!= GOT_TLS_GD
1006 || (tls_type
& GOT_TLS_IE
) == 0))
1008 if ((old_tls_type
& GOT_TLS_IE
) && tls_type
== GOT_TLS_GD
)
1009 tls_type
= old_tls_type
;
1012 (*_bfd_error_handler
)
1013 (_("%B: `%s' accessed both as normal and "
1014 "thread local symbol"),
1016 h
? h
->root
.root
.string
: "<local>");
1021 if (old_tls_type
!= tls_type
)
1024 elf_i386_hash_entry (h
)->tls_type
= tls_type
;
1026 elf_i386_local_got_tls_type (abfd
) [r_symndx
] = tls_type
;
1034 if (htab
->sgot
== NULL
)
1036 if (htab
->elf
.dynobj
== NULL
)
1037 htab
->elf
.dynobj
= abfd
;
1038 if (!create_got_section (htab
->elf
.dynobj
, info
))
1041 if (r_type
!= R_386_TLS_IE
)
1045 case R_386_TLS_LE_32
:
1049 info
->flags
|= DF_STATIC_TLS
;
1054 if (h
!= NULL
&& !info
->shared
)
1056 /* If this reloc is in a read-only section, we might
1057 need a copy reloc. We can't check reliably at this
1058 stage whether the section is read-only, as input
1059 sections have not yet been mapped to output sections.
1060 Tentatively set the flag for now, and correct in
1061 adjust_dynamic_symbol. */
1064 /* We may need a .plt entry if the function this reloc
1065 refers to is in a shared lib. */
1066 h
->plt
.refcount
+= 1;
1067 if (r_type
!= R_386_PC32
)
1068 h
->pointer_equality_needed
= 1;
1071 /* If we are creating a shared library, and this is a reloc
1072 against a global symbol, or a non PC relative reloc
1073 against a local symbol, then we need to copy the reloc
1074 into the shared library. However, if we are linking with
1075 -Bsymbolic, we do not need to copy a reloc against a
1076 global symbol which is defined in an object we are
1077 including in the link (i.e., DEF_REGULAR is set). At
1078 this point we have not seen all the input files, so it is
1079 possible that DEF_REGULAR is not set now but will be set
1080 later (it is never cleared). In case of a weak definition,
1081 DEF_REGULAR may be cleared later by a strong definition in
1082 a shared library. We account for that possibility below by
1083 storing information in the relocs_copied field of the hash
1084 table entry. A similar situation occurs when creating
1085 shared libraries and symbol visibility changes render the
1088 If on the other hand, we are creating an executable, we
1089 may need to keep relocations for symbols satisfied by a
1090 dynamic library if we manage to avoid copy relocs for the
1093 && (sec
->flags
& SEC_ALLOC
) != 0
1094 && (r_type
!= R_386_PC32
1096 && (! info
->symbolic
1097 || h
->root
.type
== bfd_link_hash_defweak
1098 || !h
->def_regular
))))
1099 || (ELIMINATE_COPY_RELOCS
1101 && (sec
->flags
& SEC_ALLOC
) != 0
1103 && (h
->root
.type
== bfd_link_hash_defweak
1104 || !h
->def_regular
)))
1106 struct elf_i386_dyn_relocs
*p
;
1107 struct elf_i386_dyn_relocs
**head
;
1109 /* We must copy these reloc types into the output file.
1110 Create a reloc section in dynobj and make room for
1116 unsigned int strndx
= elf_elfheader (abfd
)->e_shstrndx
;
1117 unsigned int shnam
= elf_section_data (sec
)->rel_hdr
.sh_name
;
1119 name
= bfd_elf_string_from_elf_section (abfd
, strndx
, shnam
);
1123 if (strncmp (name
, ".rel", 4) != 0
1124 || strcmp (bfd_get_section_name (abfd
, sec
),
1127 (*_bfd_error_handler
)
1128 (_("%B: bad relocation section name `%s\'"),
1132 if (htab
->elf
.dynobj
== NULL
)
1133 htab
->elf
.dynobj
= abfd
;
1135 dynobj
= htab
->elf
.dynobj
;
1136 sreloc
= bfd_get_section_by_name (dynobj
, name
);
1141 flags
= (SEC_HAS_CONTENTS
| SEC_READONLY
1142 | SEC_IN_MEMORY
| SEC_LINKER_CREATED
);
1143 if ((sec
->flags
& SEC_ALLOC
) != 0)
1144 flags
|= SEC_ALLOC
| SEC_LOAD
;
1145 sreloc
= bfd_make_section_with_flags (dynobj
,
1149 || ! bfd_set_section_alignment (dynobj
, sreloc
, 2))
1152 elf_section_data (sec
)->sreloc
= sreloc
;
1155 /* If this is a global symbol, we count the number of
1156 relocations we need for this symbol. */
1159 head
= &((struct elf_i386_link_hash_entry
*) h
)->dyn_relocs
;
1163 /* Track dynamic relocs needed for local syms too.
1164 We really need local syms available to do this
1168 s
= bfd_section_from_r_symndx (abfd
, &htab
->sym_sec
,
1173 head
= ((struct elf_i386_dyn_relocs
**)
1174 &elf_section_data (s
)->local_dynrel
);
1178 if (p
== NULL
|| p
->sec
!= sec
)
1180 bfd_size_type amt
= sizeof *p
;
1181 p
= bfd_alloc (htab
->elf
.dynobj
, amt
);
1192 if (r_type
== R_386_PC32
)
1197 /* This relocation describes the C++ object vtable hierarchy.
1198 Reconstruct it for later use during GC. */
1199 case R_386_GNU_VTINHERIT
:
1200 if (!bfd_elf_gc_record_vtinherit (abfd
, sec
, h
, rel
->r_offset
))
1204 /* This relocation describes which C++ vtable entries are actually
1205 used. Record for later use during GC. */
1206 case R_386_GNU_VTENTRY
:
1207 if (!bfd_elf_gc_record_vtentry (abfd
, sec
, h
, rel
->r_offset
))
1219 /* Return the section that should be marked against GC for a given
1223 elf_i386_gc_mark_hook (asection
*sec
,
1224 struct bfd_link_info
*info ATTRIBUTE_UNUSED
,
1225 Elf_Internal_Rela
*rel
,
1226 struct elf_link_hash_entry
*h
,
1227 Elf_Internal_Sym
*sym
)
1231 switch (ELF32_R_TYPE (rel
->r_info
))
1233 case R_386_GNU_VTINHERIT
:
1234 case R_386_GNU_VTENTRY
:
1238 switch (h
->root
.type
)
1240 case bfd_link_hash_defined
:
1241 case bfd_link_hash_defweak
:
1242 return h
->root
.u
.def
.section
;
1244 case bfd_link_hash_common
:
1245 return h
->root
.u
.c
.p
->section
;
1253 return bfd_section_from_elf_index (sec
->owner
, sym
->st_shndx
);
1258 /* Update the got entry reference counts for the section being removed. */
1261 elf_i386_gc_sweep_hook (bfd
*abfd
,
1262 struct bfd_link_info
*info
,
1264 const Elf_Internal_Rela
*relocs
)
1266 Elf_Internal_Shdr
*symtab_hdr
;
1267 struct elf_link_hash_entry
**sym_hashes
;
1268 bfd_signed_vma
*local_got_refcounts
;
1269 const Elf_Internal_Rela
*rel
, *relend
;
1271 elf_section_data (sec
)->local_dynrel
= NULL
;
1273 symtab_hdr
= &elf_tdata (abfd
)->symtab_hdr
;
1274 sym_hashes
= elf_sym_hashes (abfd
);
1275 local_got_refcounts
= elf_local_got_refcounts (abfd
);
1277 relend
= relocs
+ sec
->reloc_count
;
1278 for (rel
= relocs
; rel
< relend
; rel
++)
1280 unsigned long r_symndx
;
1281 unsigned int r_type
;
1282 struct elf_link_hash_entry
*h
= NULL
;
1284 r_symndx
= ELF32_R_SYM (rel
->r_info
);
1285 if (r_symndx
>= symtab_hdr
->sh_info
)
1287 struct elf_i386_link_hash_entry
*eh
;
1288 struct elf_i386_dyn_relocs
**pp
;
1289 struct elf_i386_dyn_relocs
*p
;
1291 h
= sym_hashes
[r_symndx
- symtab_hdr
->sh_info
];
1292 while (h
->root
.type
== bfd_link_hash_indirect
1293 || h
->root
.type
== bfd_link_hash_warning
)
1294 h
= (struct elf_link_hash_entry
*) h
->root
.u
.i
.link
;
1295 eh
= (struct elf_i386_link_hash_entry
*) h
;
1297 for (pp
= &eh
->dyn_relocs
; (p
= *pp
) != NULL
; pp
= &p
->next
)
1300 /* Everything must go for SEC. */
1306 r_type
= ELF32_R_TYPE (rel
->r_info
);
1307 r_type
= elf_i386_tls_transition (info
, r_type
, h
!= NULL
);
1311 if (elf_i386_hash_table (info
)->tls_ldm_got
.refcount
> 0)
1312 elf_i386_hash_table (info
)->tls_ldm_got
.refcount
-= 1;
1316 case R_386_TLS_IE_32
:
1318 case R_386_TLS_GOTIE
:
1322 if (h
->got
.refcount
> 0)
1323 h
->got
.refcount
-= 1;
1325 else if (local_got_refcounts
!= NULL
)
1327 if (local_got_refcounts
[r_symndx
] > 0)
1328 local_got_refcounts
[r_symndx
] -= 1;
1341 if (h
->plt
.refcount
> 0)
1342 h
->plt
.refcount
-= 1;
1354 /* Adjust a symbol defined by a dynamic object and referenced by a
1355 regular object. The current definition is in some section of the
1356 dynamic object, but we're not including those sections. We have to
1357 change the definition to something the rest of the link can
1361 elf_i386_adjust_dynamic_symbol (struct bfd_link_info
*info
,
1362 struct elf_link_hash_entry
*h
)
1364 struct elf_i386_link_hash_table
*htab
;
1366 unsigned int power_of_two
;
1368 /* If this is a function, put it in the procedure linkage table. We
1369 will fill in the contents of the procedure linkage table later,
1370 when we know the address of the .got section. */
1371 if (h
->type
== STT_FUNC
1374 if (h
->plt
.refcount
<= 0
1375 || SYMBOL_CALLS_LOCAL (info
, h
)
1376 || (ELF_ST_VISIBILITY (h
->other
) != STV_DEFAULT
1377 && h
->root
.type
== bfd_link_hash_undefweak
))
1379 /* This case can occur if we saw a PLT32 reloc in an input
1380 file, but the symbol was never referred to by a dynamic
1381 object, or if all references were garbage collected. In
1382 such a case, we don't actually need to build a procedure
1383 linkage table, and we can just do a PC32 reloc instead. */
1384 h
->plt
.offset
= (bfd_vma
) -1;
1391 /* It's possible that we incorrectly decided a .plt reloc was
1392 needed for an R_386_PC32 reloc to a non-function sym in
1393 check_relocs. We can't decide accurately between function and
1394 non-function syms in check-relocs; Objects loaded later in
1395 the link may change h->type. So fix it now. */
1396 h
->plt
.offset
= (bfd_vma
) -1;
1398 /* If this is a weak symbol, and there is a real definition, the
1399 processor independent code will have arranged for us to see the
1400 real definition first, and we can just use the same value. */
1401 if (h
->u
.weakdef
!= NULL
)
1403 BFD_ASSERT (h
->u
.weakdef
->root
.type
== bfd_link_hash_defined
1404 || h
->u
.weakdef
->root
.type
== bfd_link_hash_defweak
);
1405 h
->root
.u
.def
.section
= h
->u
.weakdef
->root
.u
.def
.section
;
1406 h
->root
.u
.def
.value
= h
->u
.weakdef
->root
.u
.def
.value
;
1407 if (ELIMINATE_COPY_RELOCS
|| info
->nocopyreloc
)
1408 h
->non_got_ref
= h
->u
.weakdef
->non_got_ref
;
1412 /* This is a reference to a symbol defined by a dynamic object which
1413 is not a function. */
1415 /* If we are creating a shared library, we must presume that the
1416 only references to the symbol are via the global offset table.
1417 For such cases we need not do anything here; the relocations will
1418 be handled correctly by relocate_section. */
1422 /* If there are no references to this symbol that do not use the
1423 GOT, we don't need to generate a copy reloc. */
1424 if (!h
->non_got_ref
)
1427 /* If -z nocopyreloc was given, we won't generate them either. */
1428 if (info
->nocopyreloc
)
1434 if (ELIMINATE_COPY_RELOCS
)
1436 struct elf_i386_link_hash_entry
* eh
;
1437 struct elf_i386_dyn_relocs
*p
;
1439 eh
= (struct elf_i386_link_hash_entry
*) h
;
1440 for (p
= eh
->dyn_relocs
; p
!= NULL
; p
= p
->next
)
1442 s
= p
->sec
->output_section
;
1443 if (s
!= NULL
&& (s
->flags
& SEC_READONLY
) != 0)
1447 /* If we didn't find any dynamic relocs in read-only sections, then
1448 we'll be keeping the dynamic relocs and avoiding the copy reloc. */
1456 /* We must allocate the symbol in our .dynbss section, which will
1457 become part of the .bss section of the executable. There will be
1458 an entry for this symbol in the .dynsym section. The dynamic
1459 object will contain position independent code, so all references
1460 from the dynamic object to this symbol will go through the global
1461 offset table. The dynamic linker will use the .dynsym entry to
1462 determine the address it must put in the global offset table, so
1463 both the dynamic object and the regular object will refer to the
1464 same memory location for the variable. */
1466 htab
= elf_i386_hash_table (info
);
1468 /* We must generate a R_386_COPY reloc to tell the dynamic linker to
1469 copy the initial value out of the dynamic object and into the
1470 runtime process image. */
1471 if ((h
->root
.u
.def
.section
->flags
& SEC_ALLOC
) != 0)
1473 htab
->srelbss
->size
+= sizeof (Elf32_External_Rel
);
1477 /* We need to figure out the alignment required for this symbol. I
1478 have no idea how ELF linkers handle this. */
1479 power_of_two
= bfd_log2 (h
->size
);
1480 if (power_of_two
> 3)
1483 /* Apply the required alignment. */
1485 s
->size
= BFD_ALIGN (s
->size
, (bfd_size_type
) (1 << power_of_two
));
1486 if (power_of_two
> bfd_get_section_alignment (htab
->elf
.dynobj
, s
))
1488 if (! bfd_set_section_alignment (htab
->elf
.dynobj
, s
, power_of_two
))
1492 /* Define the symbol as being at this point in the section. */
1493 h
->root
.u
.def
.section
= s
;
1494 h
->root
.u
.def
.value
= s
->size
;
1496 /* Increment the section size to make room for the symbol. */
1502 /* Allocate space in .plt, .got and associated reloc sections for
1506 allocate_dynrelocs (struct elf_link_hash_entry
*h
, void *inf
)
1508 struct bfd_link_info
*info
;
1509 struct elf_i386_link_hash_table
*htab
;
1510 struct elf_i386_link_hash_entry
*eh
;
1511 struct elf_i386_dyn_relocs
*p
;
1513 if (h
->root
.type
== bfd_link_hash_indirect
)
1516 if (h
->root
.type
== bfd_link_hash_warning
)
1517 /* When warning symbols are created, they **replace** the "real"
1518 entry in the hash table, thus we never get to see the real
1519 symbol in a hash traversal. So look at it now. */
1520 h
= (struct elf_link_hash_entry
*) h
->root
.u
.i
.link
;
1522 info
= (struct bfd_link_info
*) inf
;
1523 htab
= elf_i386_hash_table (info
);
1525 if (htab
->elf
.dynamic_sections_created
1526 && h
->plt
.refcount
> 0)
1528 /* Make sure this symbol is output as a dynamic symbol.
1529 Undefined weak syms won't yet be marked as dynamic. */
1530 if (h
->dynindx
== -1
1531 && !h
->forced_local
)
1533 if (! bfd_elf_link_record_dynamic_symbol (info
, h
))
1538 || WILL_CALL_FINISH_DYNAMIC_SYMBOL (1, 0, h
))
1540 asection
*s
= htab
->splt
;
1542 /* If this is the first .plt entry, make room for the special
1545 s
->size
+= PLT_ENTRY_SIZE
;
1547 h
->plt
.offset
= s
->size
;
1549 /* If this symbol is not defined in a regular file, and we are
1550 not generating a shared library, then set the symbol to this
1551 location in the .plt. This is required to make function
1552 pointers compare as equal between the normal executable and
1553 the shared library. */
1557 h
->root
.u
.def
.section
= s
;
1558 h
->root
.u
.def
.value
= h
->plt
.offset
;
1561 /* Make room for this entry. */
1562 s
->size
+= PLT_ENTRY_SIZE
;
1564 /* We also need to make an entry in the .got.plt section, which
1565 will be placed in the .got section by the linker script. */
1566 htab
->sgotplt
->size
+= 4;
1568 /* We also need to make an entry in the .rel.plt section. */
1569 htab
->srelplt
->size
+= sizeof (Elf32_External_Rel
);
1571 if (htab
->is_vxworks
&& !info
->shared
)
1573 /* VxWorks has a second set of relocations for each PLT entry
1574 in executables. They go in a separate relocation section,
1575 which is processed by the kernel loader. */
1577 /* There are two relocations for the initial PLT entry: an
1578 R_386_32 relocation for _GLOBAL_OFFSET_TABLE_ + 4 and an
1579 R_386_32 relocation for _GLOBAL_OFFSET_TABLE_ + 8. */
1581 if (h
->plt
.offset
== PLT_ENTRY_SIZE
)
1582 htab
->srelplt2
->size
+= (sizeof (Elf32_External_Rel
) * 2);
1584 /* There are two extra relocations for each subsequent PLT entry:
1585 an R_386_32 relocation for the GOT entry, and an R_386_32
1586 relocation for the PLT entry. */
1588 htab
->srelplt2
->size
+= (sizeof (Elf32_External_Rel
) * 2);
1593 h
->plt
.offset
= (bfd_vma
) -1;
1599 h
->plt
.offset
= (bfd_vma
) -1;
1603 /* If R_386_TLS_{IE_32,IE,GOTIE} symbol is now local to the binary,
1604 make it a R_386_TLS_LE_32 requiring no TLS entry. */
1605 if (h
->got
.refcount
> 0
1608 && (elf_i386_hash_entry(h
)->tls_type
& GOT_TLS_IE
))
1609 h
->got
.offset
= (bfd_vma
) -1;
1610 else if (h
->got
.refcount
> 0)
1614 int tls_type
= elf_i386_hash_entry(h
)->tls_type
;
1616 /* Make sure this symbol is output as a dynamic symbol.
1617 Undefined weak syms won't yet be marked as dynamic. */
1618 if (h
->dynindx
== -1
1619 && !h
->forced_local
)
1621 if (! bfd_elf_link_record_dynamic_symbol (info
, h
))
1626 h
->got
.offset
= s
->size
;
1628 /* R_386_TLS_GD needs 2 consecutive GOT slots. */
1629 if (tls_type
== GOT_TLS_GD
|| tls_type
== GOT_TLS_IE_BOTH
)
1631 dyn
= htab
->elf
.dynamic_sections_created
;
1632 /* R_386_TLS_IE_32 needs one dynamic relocation,
1633 R_386_TLS_IE resp. R_386_TLS_GOTIE needs one dynamic relocation,
1634 (but if both R_386_TLS_IE_32 and R_386_TLS_IE is present, we
1635 need two), R_386_TLS_GD needs one if local symbol and two if
1637 if (tls_type
== GOT_TLS_IE_BOTH
)
1638 htab
->srelgot
->size
+= 2 * sizeof (Elf32_External_Rel
);
1639 else if ((tls_type
== GOT_TLS_GD
&& h
->dynindx
== -1)
1640 || (tls_type
& GOT_TLS_IE
))
1641 htab
->srelgot
->size
+= sizeof (Elf32_External_Rel
);
1642 else if (tls_type
== GOT_TLS_GD
)
1643 htab
->srelgot
->size
+= 2 * sizeof (Elf32_External_Rel
);
1644 else if ((ELF_ST_VISIBILITY (h
->other
) == STV_DEFAULT
1645 || h
->root
.type
!= bfd_link_hash_undefweak
)
1647 || WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn
, 0, h
)))
1648 htab
->srelgot
->size
+= sizeof (Elf32_External_Rel
);
1651 h
->got
.offset
= (bfd_vma
) -1;
1653 eh
= (struct elf_i386_link_hash_entry
*) h
;
1654 if (eh
->dyn_relocs
== NULL
)
1657 /* In the shared -Bsymbolic case, discard space allocated for
1658 dynamic pc-relative relocs against symbols which turn out to be
1659 defined in regular objects. For the normal shared case, discard
1660 space for pc-relative relocs that have become local due to symbol
1661 visibility changes. */
1665 /* The only reloc that uses pc_count is R_386_PC32, which will
1666 appear on a call or on something like ".long foo - .". We
1667 want calls to protected symbols to resolve directly to the
1668 function rather than going via the plt. If people want
1669 function pointer comparisons to work as expected then they
1670 should avoid writing assembly like ".long foo - .". */
1671 if (SYMBOL_CALLS_LOCAL (info
, h
))
1673 struct elf_i386_dyn_relocs
**pp
;
1675 for (pp
= &eh
->dyn_relocs
; (p
= *pp
) != NULL
; )
1677 p
->count
-= p
->pc_count
;
1686 /* Also discard relocs on undefined weak syms with non-default
1688 if (ELF_ST_VISIBILITY (h
->other
) != STV_DEFAULT
1689 && h
->root
.type
== bfd_link_hash_undefweak
)
1690 eh
->dyn_relocs
= NULL
;
1692 else if (ELIMINATE_COPY_RELOCS
)
1694 /* For the non-shared case, discard space for relocs against
1695 symbols which turn out to need copy relocs or are not
1701 || (htab
->elf
.dynamic_sections_created
1702 && (h
->root
.type
== bfd_link_hash_undefweak
1703 || h
->root
.type
== bfd_link_hash_undefined
))))
1705 /* Make sure this symbol is output as a dynamic symbol.
1706 Undefined weak syms won't yet be marked as dynamic. */
1707 if (h
->dynindx
== -1
1708 && !h
->forced_local
)
1710 if (! bfd_elf_link_record_dynamic_symbol (info
, h
))
1714 /* If that succeeded, we know we'll be keeping all the
1716 if (h
->dynindx
!= -1)
1720 eh
->dyn_relocs
= NULL
;
1725 /* Finally, allocate space. */
1726 for (p
= eh
->dyn_relocs
; p
!= NULL
; p
= p
->next
)
1728 asection
*sreloc
= elf_section_data (p
->sec
)->sreloc
;
1729 sreloc
->size
+= p
->count
* sizeof (Elf32_External_Rel
);
1735 /* Find any dynamic relocs that apply to read-only sections. */
1738 readonly_dynrelocs (struct elf_link_hash_entry
*h
, void *inf
)
1740 struct elf_i386_link_hash_entry
*eh
;
1741 struct elf_i386_dyn_relocs
*p
;
1743 if (h
->root
.type
== bfd_link_hash_warning
)
1744 h
= (struct elf_link_hash_entry
*) h
->root
.u
.i
.link
;
1746 eh
= (struct elf_i386_link_hash_entry
*) h
;
1747 for (p
= eh
->dyn_relocs
; p
!= NULL
; p
= p
->next
)
1749 asection
*s
= p
->sec
->output_section
;
1751 if (s
!= NULL
&& (s
->flags
& SEC_READONLY
) != 0)
1753 struct bfd_link_info
*info
= (struct bfd_link_info
*) inf
;
1755 info
->flags
|= DF_TEXTREL
;
1757 /* Not an error, just cut short the traversal. */
1764 /* Set the sizes of the dynamic sections. */
1767 elf_i386_size_dynamic_sections (bfd
*output_bfd ATTRIBUTE_UNUSED
,
1768 struct bfd_link_info
*info
)
1770 struct elf_i386_link_hash_table
*htab
;
1776 htab
= elf_i386_hash_table (info
);
1777 dynobj
= htab
->elf
.dynobj
;
1781 if (htab
->elf
.dynamic_sections_created
)
1783 /* Set the contents of the .interp section to the interpreter. */
1784 if (info
->executable
)
1786 s
= bfd_get_section_by_name (dynobj
, ".interp");
1789 s
->size
= sizeof ELF_DYNAMIC_INTERPRETER
;
1790 s
->contents
= (unsigned char *) ELF_DYNAMIC_INTERPRETER
;
1794 /* Set up .got offsets for local syms, and space for local dynamic
1796 for (ibfd
= info
->input_bfds
; ibfd
!= NULL
; ibfd
= ibfd
->link_next
)
1798 bfd_signed_vma
*local_got
;
1799 bfd_signed_vma
*end_local_got
;
1800 char *local_tls_type
;
1801 bfd_size_type locsymcount
;
1802 Elf_Internal_Shdr
*symtab_hdr
;
1805 if (bfd_get_flavour (ibfd
) != bfd_target_elf_flavour
)
1808 for (s
= ibfd
->sections
; s
!= NULL
; s
= s
->next
)
1810 struct elf_i386_dyn_relocs
*p
;
1812 for (p
= *((struct elf_i386_dyn_relocs
**)
1813 &elf_section_data (s
)->local_dynrel
);
1817 if (!bfd_is_abs_section (p
->sec
)
1818 && bfd_is_abs_section (p
->sec
->output_section
))
1820 /* Input section has been discarded, either because
1821 it is a copy of a linkonce section or due to
1822 linker script /DISCARD/, so we'll be discarding
1825 else if (p
->count
!= 0)
1827 srel
= elf_section_data (p
->sec
)->sreloc
;
1828 srel
->size
+= p
->count
* sizeof (Elf32_External_Rel
);
1829 if ((p
->sec
->output_section
->flags
& SEC_READONLY
) != 0)
1830 info
->flags
|= DF_TEXTREL
;
1835 local_got
= elf_local_got_refcounts (ibfd
);
1839 symtab_hdr
= &elf_tdata (ibfd
)->symtab_hdr
;
1840 locsymcount
= symtab_hdr
->sh_info
;
1841 end_local_got
= local_got
+ locsymcount
;
1842 local_tls_type
= elf_i386_local_got_tls_type (ibfd
);
1844 srel
= htab
->srelgot
;
1845 for (; local_got
< end_local_got
; ++local_got
, ++local_tls_type
)
1849 *local_got
= s
->size
;
1851 if (*local_tls_type
== GOT_TLS_GD
1852 || *local_tls_type
== GOT_TLS_IE_BOTH
)
1855 || *local_tls_type
== GOT_TLS_GD
1856 || (*local_tls_type
& GOT_TLS_IE
))
1858 if (*local_tls_type
== GOT_TLS_IE_BOTH
)
1859 srel
->size
+= 2 * sizeof (Elf32_External_Rel
);
1861 srel
->size
+= sizeof (Elf32_External_Rel
);
1865 *local_got
= (bfd_vma
) -1;
1869 if (htab
->tls_ldm_got
.refcount
> 0)
1871 /* Allocate 2 got entries and 1 dynamic reloc for R_386_TLS_LDM
1873 htab
->tls_ldm_got
.offset
= htab
->sgot
->size
;
1874 htab
->sgot
->size
+= 8;
1875 htab
->srelgot
->size
+= sizeof (Elf32_External_Rel
);
1878 htab
->tls_ldm_got
.offset
= -1;
1880 if (htab
->is_vxworks
)
1882 /* Save the GOT and PLT symbols in the hash table for easy access.
1883 Mark them as having relocations; they might not, but we won't
1884 know for sure until we build the GOT in finish_dynamic_symbol. */
1886 htab
->hgot
= elf_link_hash_lookup (elf_hash_table (info
),
1887 "_GLOBAL_OFFSET_TABLE_",
1888 FALSE
, FALSE
, FALSE
);
1890 htab
->hgot
->indx
= -2;
1891 htab
->hplt
= elf_link_hash_lookup (elf_hash_table (info
),
1892 "_PROCEDURE_LINKAGE_TABLE_",
1893 FALSE
, FALSE
, FALSE
);
1895 htab
->hplt
->indx
= -2;
1897 if (htab
->is_vxworks
&& htab
->hplt
&& htab
->splt
->flags
& SEC_CODE
)
1898 htab
->hplt
->type
= STT_FUNC
;
1901 /* Allocate global sym .plt and .got entries, and space for global
1902 sym dynamic relocs. */
1903 elf_link_hash_traverse (&htab
->elf
, allocate_dynrelocs
, (PTR
) info
);
1905 /* We now have determined the sizes of the various dynamic sections.
1906 Allocate memory for them. */
1908 for (s
= dynobj
->sections
; s
!= NULL
; s
= s
->next
)
1910 bfd_boolean strip_section
= TRUE
;
1912 if ((s
->flags
& SEC_LINKER_CREATED
) == 0)
1917 || s
== htab
->sgotplt
1918 || s
== htab
->sdynbss
)
1920 /* Strip this section if we don't need it; see the
1922 /* We'd like to strip these sections if they aren't needed, but if
1923 we've exported dynamic symbols from them we must leave them.
1924 It's too late to tell BFD to get rid of the symbols. */
1926 if (htab
->hplt
!= NULL
)
1927 strip_section
= FALSE
;
1929 else if (strncmp (bfd_get_section_name (dynobj
, s
), ".rel", 4) == 0)
1931 if (s
->size
!= 0 && s
!= htab
->srelplt
&& s
!= htab
->srelplt2
)
1934 /* We use the reloc_count field as a counter if we need
1935 to copy relocs into the output file. */
1940 /* It's not one of our sections, so don't allocate space. */
1944 if (s
->size
== 0 && strip_section
)
1946 /* If we don't need this section, strip it from the
1947 output file. This is mostly to handle .rel.bss and
1948 .rel.plt. We must create both sections in
1949 create_dynamic_sections, because they must be created
1950 before the linker maps input sections to output
1951 sections. The linker does that before
1952 adjust_dynamic_symbol is called, and it is that
1953 function which decides whether anything needs to go
1954 into these sections. */
1956 s
->flags
|= SEC_EXCLUDE
;
1960 /* Allocate memory for the section contents. We use bfd_zalloc
1961 here in case unused entries are not reclaimed before the
1962 section's contents are written out. This should not happen,
1963 but this way if it does, we get a R_386_NONE reloc instead
1965 s
->contents
= bfd_zalloc (dynobj
, s
->size
);
1966 if (s
->contents
== NULL
)
1970 if (htab
->elf
.dynamic_sections_created
)
1972 /* Add some entries to the .dynamic section. We fill in the
1973 values later, in elf_i386_finish_dynamic_sections, but we
1974 must add the entries now so that we get the correct size for
1975 the .dynamic section. The DT_DEBUG entry is filled in by the
1976 dynamic linker and used by the debugger. */
1977 #define add_dynamic_entry(TAG, VAL) \
1978 _bfd_elf_add_dynamic_entry (info, TAG, VAL)
1980 if (info
->executable
)
1982 if (!add_dynamic_entry (DT_DEBUG
, 0))
1986 if (htab
->splt
->size
!= 0)
1988 if (!add_dynamic_entry (DT_PLTGOT
, 0)
1989 || !add_dynamic_entry (DT_PLTRELSZ
, 0)
1990 || !add_dynamic_entry (DT_PLTREL
, DT_REL
)
1991 || !add_dynamic_entry (DT_JMPREL
, 0))
1997 if (!add_dynamic_entry (DT_REL
, 0)
1998 || !add_dynamic_entry (DT_RELSZ
, 0)
1999 || !add_dynamic_entry (DT_RELENT
, sizeof (Elf32_External_Rel
)))
2002 /* If any dynamic relocs apply to a read-only section,
2003 then we need a DT_TEXTREL entry. */
2004 if ((info
->flags
& DF_TEXTREL
) == 0)
2005 elf_link_hash_traverse (&htab
->elf
, readonly_dynrelocs
,
2008 if ((info
->flags
& DF_TEXTREL
) != 0)
2010 if (!add_dynamic_entry (DT_TEXTREL
, 0))
2015 #undef add_dynamic_entry
2020 /* Set the correct type for an x86 ELF section. We do this by the
2021 section name, which is a hack, but ought to work. */
2024 elf_i386_fake_sections (bfd
*abfd ATTRIBUTE_UNUSED
,
2025 Elf_Internal_Shdr
*hdr
,
2028 register const char *name
;
2030 name
= bfd_get_section_name (abfd
, sec
);
2032 /* This is an ugly, but unfortunately necessary hack that is
2033 needed when producing EFI binaries on x86. It tells
2034 elf.c:elf_fake_sections() not to consider ".reloc" as a section
2035 containing ELF relocation info. We need this hack in order to
2036 be able to generate ELF binaries that can be translated into
2037 EFI applications (which are essentially COFF objects). Those
2038 files contain a COFF ".reloc" section inside an ELFNN object,
2039 which would normally cause BFD to segfault because it would
2040 attempt to interpret this section as containing relocation
2041 entries for section "oc". With this hack enabled, ".reloc"
2042 will be treated as a normal data section, which will avoid the
2043 segfault. However, you won't be able to create an ELFNN binary
2044 with a section named "oc" that needs relocations, but that's
2045 the kind of ugly side-effects you get when detecting section
2046 types based on their names... In practice, this limitation is
2047 unlikely to bite. */
2048 if (strcmp (name
, ".reloc") == 0)
2049 hdr
->sh_type
= SHT_PROGBITS
;
2054 /* Return the base VMA address which should be subtracted from real addresses
2055 when resolving @dtpoff relocation.
2056 This is PT_TLS segment p_vaddr. */
2059 dtpoff_base (struct bfd_link_info
*info
)
2061 /* If tls_sec is NULL, we should have signalled an error already. */
2062 if (elf_hash_table (info
)->tls_sec
== NULL
)
2064 return elf_hash_table (info
)->tls_sec
->vma
;
2067 /* Return the relocation value for @tpoff relocation
2068 if STT_TLS virtual address is ADDRESS. */
2071 tpoff (struct bfd_link_info
*info
, bfd_vma address
)
2073 struct elf_link_hash_table
*htab
= elf_hash_table (info
);
2075 /* If tls_sec is NULL, we should have signalled an error already. */
2076 if (htab
->tls_sec
== NULL
)
2078 return htab
->tls_size
+ htab
->tls_sec
->vma
- address
;
2081 /* Relocate an i386 ELF section. */
2084 elf_i386_relocate_section (bfd
*output_bfd
,
2085 struct bfd_link_info
*info
,
2087 asection
*input_section
,
2089 Elf_Internal_Rela
*relocs
,
2090 Elf_Internal_Sym
*local_syms
,
2091 asection
**local_sections
)
2093 struct elf_i386_link_hash_table
*htab
;
2094 Elf_Internal_Shdr
*symtab_hdr
;
2095 struct elf_link_hash_entry
**sym_hashes
;
2096 bfd_vma
*local_got_offsets
;
2097 Elf_Internal_Rela
*rel
;
2098 Elf_Internal_Rela
*relend
;
2100 htab
= elf_i386_hash_table (info
);
2101 symtab_hdr
= &elf_tdata (input_bfd
)->symtab_hdr
;
2102 sym_hashes
= elf_sym_hashes (input_bfd
);
2103 local_got_offsets
= elf_local_got_offsets (input_bfd
);
2106 relend
= relocs
+ input_section
->reloc_count
;
2107 for (; rel
< relend
; rel
++)
2109 unsigned int r_type
;
2110 reloc_howto_type
*howto
;
2111 unsigned long r_symndx
;
2112 struct elf_link_hash_entry
*h
;
2113 Elf_Internal_Sym
*sym
;
2117 bfd_boolean unresolved_reloc
;
2118 bfd_reloc_status_type r
;
2122 r_type
= ELF32_R_TYPE (rel
->r_info
);
2123 if (r_type
== R_386_GNU_VTINHERIT
2124 || r_type
== R_386_GNU_VTENTRY
)
2127 if ((indx
= r_type
) >= R_386_standard
2128 && ((indx
= r_type
- R_386_ext_offset
) - R_386_standard
2129 >= R_386_ext
- R_386_standard
)
2130 && ((indx
= r_type
- R_386_tls_offset
) - R_386_ext
2131 >= R_386_tls
- R_386_ext
))
2133 (*_bfd_error_handler
)
2134 (_("%B: unrecognized relocation (0x%x) in section `%A'"),
2135 input_bfd
, input_section
, r_type
);
2136 bfd_set_error (bfd_error_bad_value
);
2139 howto
= elf_howto_table
+ indx
;
2141 r_symndx
= ELF32_R_SYM (rel
->r_info
);
2143 if (info
->relocatable
)
2148 /* This is a relocatable link. We don't have to change
2149 anything, unless the reloc is against a section symbol,
2150 in which case we have to adjust according to where the
2151 section symbol winds up in the output section. */
2152 if (r_symndx
>= symtab_hdr
->sh_info
)
2155 sym
= local_syms
+ r_symndx
;
2156 if (ELF_ST_TYPE (sym
->st_info
) != STT_SECTION
)
2159 sec
= local_sections
[r_symndx
];
2160 val
= sec
->output_offset
;
2164 where
= contents
+ rel
->r_offset
;
2165 switch (howto
->size
)
2167 /* FIXME: overflow checks. */
2169 val
+= bfd_get_8 (input_bfd
, where
);
2170 bfd_put_8 (input_bfd
, val
, where
);
2173 val
+= bfd_get_16 (input_bfd
, where
);
2174 bfd_put_16 (input_bfd
, val
, where
);
2177 val
+= bfd_get_32 (input_bfd
, where
);
2178 bfd_put_32 (input_bfd
, val
, where
);
2186 /* This is a final link. */
2190 unresolved_reloc
= FALSE
;
2191 if (r_symndx
< symtab_hdr
->sh_info
)
2193 sym
= local_syms
+ r_symndx
;
2194 sec
= local_sections
[r_symndx
];
2195 relocation
= (sec
->output_section
->vma
2196 + sec
->output_offset
2198 if ((sec
->flags
& SEC_MERGE
)
2199 && ELF_ST_TYPE (sym
->st_info
) == STT_SECTION
)
2203 bfd_byte
*where
= contents
+ rel
->r_offset
;
2205 switch (howto
->size
)
2208 addend
= bfd_get_8 (input_bfd
, where
);
2209 if (howto
->pc_relative
)
2211 addend
= (addend
^ 0x80) - 0x80;
2216 addend
= bfd_get_16 (input_bfd
, where
);
2217 if (howto
->pc_relative
)
2219 addend
= (addend
^ 0x8000) - 0x8000;
2224 addend
= bfd_get_32 (input_bfd
, where
);
2225 if (howto
->pc_relative
)
2227 addend
= (addend
^ 0x80000000) - 0x80000000;
2236 addend
= _bfd_elf_rel_local_sym (output_bfd
, sym
, &msec
, addend
);
2237 addend
-= relocation
;
2238 addend
+= msec
->output_section
->vma
+ msec
->output_offset
;
2240 switch (howto
->size
)
2243 /* FIXME: overflow checks. */
2244 if (howto
->pc_relative
)
2246 bfd_put_8 (input_bfd
, addend
, where
);
2249 if (howto
->pc_relative
)
2251 bfd_put_16 (input_bfd
, addend
, where
);
2254 if (howto
->pc_relative
)
2256 bfd_put_32 (input_bfd
, addend
, where
);
2265 RELOC_FOR_GLOBAL_SYMBOL (info
, input_bfd
, input_section
, rel
,
2266 r_symndx
, symtab_hdr
, sym_hashes
,
2268 unresolved_reloc
, warned
);
2274 /* Relocation is to the entry for this symbol in the global
2276 if (htab
->sgot
== NULL
)
2283 off
= h
->got
.offset
;
2284 dyn
= htab
->elf
.dynamic_sections_created
;
2285 if (! WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn
, info
->shared
, h
)
2287 && SYMBOL_REFERENCES_LOCAL (info
, h
))
2288 || (ELF_ST_VISIBILITY (h
->other
)
2289 && h
->root
.type
== bfd_link_hash_undefweak
))
2291 /* This is actually a static link, or it is a
2292 -Bsymbolic link and the symbol is defined
2293 locally, or the symbol was forced to be local
2294 because of a version file. We must initialize
2295 this entry in the global offset table. Since the
2296 offset must always be a multiple of 4, we use the
2297 least significant bit to record whether we have
2298 initialized it already.
2300 When doing a dynamic link, we create a .rel.got
2301 relocation entry to initialize the value. This
2302 is done in the finish_dynamic_symbol routine. */
2307 bfd_put_32 (output_bfd
, relocation
,
2308 htab
->sgot
->contents
+ off
);
2313 unresolved_reloc
= FALSE
;
2317 if (local_got_offsets
== NULL
)
2320 off
= local_got_offsets
[r_symndx
];
2322 /* The offset must always be a multiple of 4. We use
2323 the least significant bit to record whether we have
2324 already generated the necessary reloc. */
2329 bfd_put_32 (output_bfd
, relocation
,
2330 htab
->sgot
->contents
+ off
);
2335 Elf_Internal_Rela outrel
;
2342 outrel
.r_offset
= (htab
->sgot
->output_section
->vma
2343 + htab
->sgot
->output_offset
2345 outrel
.r_info
= ELF32_R_INFO (0, R_386_RELATIVE
);
2347 loc
+= s
->reloc_count
++ * sizeof (Elf32_External_Rel
);
2348 bfd_elf32_swap_reloc_out (output_bfd
, &outrel
, loc
);
2351 local_got_offsets
[r_symndx
] |= 1;
2355 if (off
>= (bfd_vma
) -2)
2358 relocation
= htab
->sgot
->output_section
->vma
2359 + htab
->sgot
->output_offset
+ off
2360 - htab
->sgotplt
->output_section
->vma
2361 - htab
->sgotplt
->output_offset
;
2365 /* Relocation is relative to the start of the global offset
2368 /* Check to make sure it isn't a protected function symbol
2369 for shared library since it may not be local when used
2370 as function address. */
2372 && !info
->executable
2375 && h
->type
== STT_FUNC
2376 && ELF_ST_VISIBILITY (h
->other
) == STV_PROTECTED
)
2378 (*_bfd_error_handler
)
2379 (_("%B: relocation R_386_GOTOFF against protected function `%s' can not be used when making a shared object"),
2380 input_bfd
, h
->root
.root
.string
);
2381 bfd_set_error (bfd_error_bad_value
);
2385 /* Note that sgot is not involved in this
2386 calculation. We always want the start of .got.plt. If we
2387 defined _GLOBAL_OFFSET_TABLE_ in a different way, as is
2388 permitted by the ABI, we might have to change this
2390 relocation
-= htab
->sgotplt
->output_section
->vma
2391 + htab
->sgotplt
->output_offset
;
2395 /* Use global offset table as symbol value. */
2396 relocation
= htab
->sgotplt
->output_section
->vma
2397 + htab
->sgotplt
->output_offset
;
2398 unresolved_reloc
= FALSE
;
2402 /* Relocation is to the entry for this symbol in the
2403 procedure linkage table. */
2405 /* Resolve a PLT32 reloc against a local symbol directly,
2406 without using the procedure linkage table. */
2410 if (h
->plt
.offset
== (bfd_vma
) -1
2411 || htab
->splt
== NULL
)
2413 /* We didn't make a PLT entry for this symbol. This
2414 happens when statically linking PIC code, or when
2415 using -Bsymbolic. */
2419 relocation
= (htab
->splt
->output_section
->vma
2420 + htab
->splt
->output_offset
2422 unresolved_reloc
= FALSE
;
2427 /* r_symndx will be zero only for relocs against symbols
2428 from removed linkonce sections, or sections discarded by
2432 /* Zero the section contents. eh_frame generated by old
2433 versions of gcc isn't edited by elf-eh-frame.c, so
2434 FDEs for discarded linkonce functions might remain.
2435 Putting zeros here will zero such FDE's address range.
2436 This is a hint to unwinders and other consumers of
2437 exception handling info that the FDE is invalid. */
2438 bfd_put_32 (input_bfd
, 0, contents
+ rel
->r_offset
);
2442 if ((input_section
->flags
& SEC_ALLOC
) == 0)
2447 || ELF_ST_VISIBILITY (h
->other
) == STV_DEFAULT
2448 || h
->root
.type
!= bfd_link_hash_undefweak
)
2449 && (r_type
!= R_386_PC32
2450 || !SYMBOL_CALLS_LOCAL (info
, h
)))
2451 || (ELIMINATE_COPY_RELOCS
2458 || h
->root
.type
== bfd_link_hash_undefweak
2459 || h
->root
.type
== bfd_link_hash_undefined
)))
2461 Elf_Internal_Rela outrel
;
2463 bfd_boolean skip
, relocate
;
2466 /* When generating a shared object, these relocations
2467 are copied into the output file to be resolved at run
2474 _bfd_elf_section_offset (output_bfd
, info
, input_section
,
2476 if (outrel
.r_offset
== (bfd_vma
) -1)
2478 else if (outrel
.r_offset
== (bfd_vma
) -2)
2479 skip
= TRUE
, relocate
= TRUE
;
2480 outrel
.r_offset
+= (input_section
->output_section
->vma
2481 + input_section
->output_offset
);
2484 memset (&outrel
, 0, sizeof outrel
);
2487 && (r_type
== R_386_PC32
2490 || !h
->def_regular
))
2491 outrel
.r_info
= ELF32_R_INFO (h
->dynindx
, r_type
);
2494 /* This symbol is local, or marked to become local. */
2496 outrel
.r_info
= ELF32_R_INFO (0, R_386_RELATIVE
);
2499 sreloc
= elf_section_data (input_section
)->sreloc
;
2503 loc
= sreloc
->contents
;
2504 loc
+= sreloc
->reloc_count
++ * sizeof (Elf32_External_Rel
);
2505 bfd_elf32_swap_reloc_out (output_bfd
, &outrel
, loc
);
2507 /* If this reloc is against an external symbol, we do
2508 not want to fiddle with the addend. Otherwise, we
2509 need to include the symbol value so that it becomes
2510 an addend for the dynamic reloc. */
2519 Elf_Internal_Rela outrel
;
2523 outrel
.r_offset
= rel
->r_offset
2524 + input_section
->output_section
->vma
2525 + input_section
->output_offset
;
2526 outrel
.r_info
= ELF32_R_INFO (0, R_386_RELATIVE
);
2527 sreloc
= elf_section_data (input_section
)->sreloc
;
2530 loc
= sreloc
->contents
;
2531 loc
+= sreloc
->reloc_count
++ * sizeof (Elf32_External_Rel
);
2532 bfd_elf32_swap_reloc_out (output_bfd
, &outrel
, loc
);
2537 case R_386_TLS_IE_32
:
2538 case R_386_TLS_GOTIE
:
2539 r_type
= elf_i386_tls_transition (info
, r_type
, h
== NULL
);
2540 tls_type
= GOT_UNKNOWN
;
2541 if (h
== NULL
&& local_got_offsets
)
2542 tls_type
= elf_i386_local_got_tls_type (input_bfd
) [r_symndx
];
2545 tls_type
= elf_i386_hash_entry(h
)->tls_type
;
2546 if (!info
->shared
&& h
->dynindx
== -1 && (tls_type
& GOT_TLS_IE
))
2547 r_type
= R_386_TLS_LE_32
;
2549 if (tls_type
== GOT_TLS_IE
)
2550 tls_type
= GOT_TLS_IE_NEG
;
2551 if (r_type
== R_386_TLS_GD
)
2553 if (tls_type
== GOT_TLS_IE_POS
)
2554 r_type
= R_386_TLS_GOTIE
;
2555 else if (tls_type
& GOT_TLS_IE
)
2556 r_type
= R_386_TLS_IE_32
;
2559 if (r_type
== R_386_TLS_LE_32
)
2561 BFD_ASSERT (! unresolved_reloc
);
2562 if (ELF32_R_TYPE (rel
->r_info
) == R_386_TLS_GD
)
2564 unsigned int val
, type
;
2567 /* GD->LE transition. */
2568 BFD_ASSERT (rel
->r_offset
>= 2);
2569 type
= bfd_get_8 (input_bfd
, contents
+ rel
->r_offset
- 2);
2570 BFD_ASSERT (type
== 0x8d || type
== 0x04);
2571 BFD_ASSERT (rel
->r_offset
+ 9 <= input_section
->size
);
2572 BFD_ASSERT (bfd_get_8 (input_bfd
,
2573 contents
+ rel
->r_offset
+ 4)
2575 BFD_ASSERT (rel
+ 1 < relend
);
2576 BFD_ASSERT (ELF32_R_TYPE (rel
[1].r_info
) == R_386_PLT32
);
2577 roff
= rel
->r_offset
+ 5;
2578 val
= bfd_get_8 (input_bfd
,
2579 contents
+ rel
->r_offset
- 1);
2582 /* leal foo(,%reg,1), %eax; call ___tls_get_addr
2584 movl %gs:0, %eax; subl $foo@tpoff, %eax
2585 (6 byte form of subl). */
2586 BFD_ASSERT (rel
->r_offset
>= 3);
2587 BFD_ASSERT (bfd_get_8 (input_bfd
,
2588 contents
+ rel
->r_offset
- 3)
2590 BFD_ASSERT ((val
& 0xc7) == 0x05 && val
!= (4 << 3));
2591 memcpy (contents
+ rel
->r_offset
- 3,
2592 "\x65\xa1\0\0\0\0\x81\xe8\0\0\0", 12);
2596 BFD_ASSERT ((val
& 0xf8) == 0x80 && (val
& 7) != 4);
2597 if (rel
->r_offset
+ 10 <= input_section
->size
2598 && bfd_get_8 (input_bfd
,
2599 contents
+ rel
->r_offset
+ 9) == 0x90)
2601 /* leal foo(%reg), %eax; call ___tls_get_addr; nop
2603 movl %gs:0, %eax; subl $foo@tpoff, %eax
2604 (6 byte form of subl). */
2605 memcpy (contents
+ rel
->r_offset
- 2,
2606 "\x65\xa1\0\0\0\0\x81\xe8\0\0\0", 12);
2607 roff
= rel
->r_offset
+ 6;
2611 /* leal foo(%reg), %eax; call ___tls_get_addr
2613 movl %gs:0, %eax; subl $foo@tpoff, %eax
2614 (5 byte form of subl). */
2615 memcpy (contents
+ rel
->r_offset
- 2,
2616 "\x65\xa1\0\0\0\0\x2d\0\0\0", 11);
2619 bfd_put_32 (output_bfd
, tpoff (info
, relocation
),
2621 /* Skip R_386_PLT32. */
2625 else if (ELF32_R_TYPE (rel
->r_info
) == R_386_TLS_IE
)
2627 unsigned int val
, type
;
2629 /* IE->LE transition:
2630 Originally it can be one of:
2638 BFD_ASSERT (rel
->r_offset
>= 1);
2639 val
= bfd_get_8 (input_bfd
, contents
+ rel
->r_offset
- 1);
2640 BFD_ASSERT (rel
->r_offset
+ 4 <= input_section
->size
);
2643 /* movl foo, %eax. */
2644 bfd_put_8 (output_bfd
, 0xb8,
2645 contents
+ rel
->r_offset
- 1);
2649 BFD_ASSERT (rel
->r_offset
>= 2);
2650 type
= bfd_get_8 (input_bfd
,
2651 contents
+ rel
->r_offset
- 2);
2656 BFD_ASSERT ((val
& 0xc7) == 0x05);
2657 bfd_put_8 (output_bfd
, 0xc7,
2658 contents
+ rel
->r_offset
- 2);
2659 bfd_put_8 (output_bfd
,
2660 0xc0 | ((val
>> 3) & 7),
2661 contents
+ rel
->r_offset
- 1);
2665 BFD_ASSERT ((val
& 0xc7) == 0x05);
2666 bfd_put_8 (output_bfd
, 0x81,
2667 contents
+ rel
->r_offset
- 2);
2668 bfd_put_8 (output_bfd
,
2669 0xc0 | ((val
>> 3) & 7),
2670 contents
+ rel
->r_offset
- 1);
2677 bfd_put_32 (output_bfd
, -tpoff (info
, relocation
),
2678 contents
+ rel
->r_offset
);
2683 unsigned int val
, type
;
2685 /* {IE_32,GOTIE}->LE transition:
2686 Originally it can be one of:
2687 subl foo(%reg1), %reg2
2688 movl foo(%reg1), %reg2
2689 addl foo(%reg1), %reg2
2692 movl $foo, %reg2 (6 byte form)
2693 addl $foo, %reg2. */
2694 BFD_ASSERT (rel
->r_offset
>= 2);
2695 type
= bfd_get_8 (input_bfd
, contents
+ rel
->r_offset
- 2);
2696 val
= bfd_get_8 (input_bfd
, contents
+ rel
->r_offset
- 1);
2697 BFD_ASSERT (rel
->r_offset
+ 4 <= input_section
->size
);
2698 BFD_ASSERT ((val
& 0xc0) == 0x80 && (val
& 7) != 4);
2702 bfd_put_8 (output_bfd
, 0xc7,
2703 contents
+ rel
->r_offset
- 2);
2704 bfd_put_8 (output_bfd
, 0xc0 | ((val
>> 3) & 7),
2705 contents
+ rel
->r_offset
- 1);
2707 else if (type
== 0x2b)
2710 bfd_put_8 (output_bfd
, 0x81,
2711 contents
+ rel
->r_offset
- 2);
2712 bfd_put_8 (output_bfd
, 0xe8 | ((val
>> 3) & 7),
2713 contents
+ rel
->r_offset
- 1);
2715 else if (type
== 0x03)
2718 bfd_put_8 (output_bfd
, 0x81,
2719 contents
+ rel
->r_offset
- 2);
2720 bfd_put_8 (output_bfd
, 0xc0 | ((val
>> 3) & 7),
2721 contents
+ rel
->r_offset
- 1);
2725 if (ELF32_R_TYPE (rel
->r_info
) == R_386_TLS_GOTIE
)
2726 bfd_put_32 (output_bfd
, -tpoff (info
, relocation
),
2727 contents
+ rel
->r_offset
);
2729 bfd_put_32 (output_bfd
, tpoff (info
, relocation
),
2730 contents
+ rel
->r_offset
);
2735 if (htab
->sgot
== NULL
)
2739 off
= h
->got
.offset
;
2742 if (local_got_offsets
== NULL
)
2745 off
= local_got_offsets
[r_symndx
];
2752 Elf_Internal_Rela outrel
;
2756 if (htab
->srelgot
== NULL
)
2759 outrel
.r_offset
= (htab
->sgot
->output_section
->vma
2760 + htab
->sgot
->output_offset
+ off
);
2762 indx
= h
&& h
->dynindx
!= -1 ? h
->dynindx
: 0;
2763 if (r_type
== R_386_TLS_GD
)
2764 dr_type
= R_386_TLS_DTPMOD32
;
2765 else if (tls_type
== GOT_TLS_IE_POS
)
2766 dr_type
= R_386_TLS_TPOFF
;
2768 dr_type
= R_386_TLS_TPOFF32
;
2769 if (dr_type
== R_386_TLS_TPOFF
&& indx
== 0)
2770 bfd_put_32 (output_bfd
, relocation
- dtpoff_base (info
),
2771 htab
->sgot
->contents
+ off
);
2772 else if (dr_type
== R_386_TLS_TPOFF32
&& indx
== 0)
2773 bfd_put_32 (output_bfd
, dtpoff_base (info
) - relocation
,
2774 htab
->sgot
->contents
+ off
);
2776 bfd_put_32 (output_bfd
, 0,
2777 htab
->sgot
->contents
+ off
);
2778 outrel
.r_info
= ELF32_R_INFO (indx
, dr_type
);
2779 loc
= htab
->srelgot
->contents
;
2780 loc
+= htab
->srelgot
->reloc_count
++ * sizeof (Elf32_External_Rel
);
2781 bfd_elf32_swap_reloc_out (output_bfd
, &outrel
, loc
);
2783 if (r_type
== R_386_TLS_GD
)
2787 BFD_ASSERT (! unresolved_reloc
);
2788 bfd_put_32 (output_bfd
,
2789 relocation
- dtpoff_base (info
),
2790 htab
->sgot
->contents
+ off
+ 4);
2794 bfd_put_32 (output_bfd
, 0,
2795 htab
->sgot
->contents
+ off
+ 4);
2796 outrel
.r_info
= ELF32_R_INFO (indx
,
2797 R_386_TLS_DTPOFF32
);
2798 outrel
.r_offset
+= 4;
2799 htab
->srelgot
->reloc_count
++;
2800 loc
+= sizeof (Elf32_External_Rel
);
2801 bfd_elf32_swap_reloc_out (output_bfd
, &outrel
, loc
);
2804 else if (tls_type
== GOT_TLS_IE_BOTH
)
2806 bfd_put_32 (output_bfd
,
2807 indx
== 0 ? relocation
- dtpoff_base (info
) : 0,
2808 htab
->sgot
->contents
+ off
+ 4);
2809 outrel
.r_info
= ELF32_R_INFO (indx
, R_386_TLS_TPOFF
);
2810 outrel
.r_offset
+= 4;
2811 htab
->srelgot
->reloc_count
++;
2812 loc
+= sizeof (Elf32_External_Rel
);
2813 bfd_elf32_swap_reloc_out (output_bfd
, &outrel
, loc
);
2819 local_got_offsets
[r_symndx
] |= 1;
2822 if (off
>= (bfd_vma
) -2)
2824 if (r_type
== ELF32_R_TYPE (rel
->r_info
))
2826 bfd_vma g_o_t
= htab
->sgotplt
->output_section
->vma
2827 + htab
->sgotplt
->output_offset
;
2828 relocation
= htab
->sgot
->output_section
->vma
2829 + htab
->sgot
->output_offset
+ off
- g_o_t
;
2830 if ((r_type
== R_386_TLS_IE
|| r_type
== R_386_TLS_GOTIE
)
2831 && tls_type
== GOT_TLS_IE_BOTH
)
2833 if (r_type
== R_386_TLS_IE
)
2834 relocation
+= g_o_t
;
2835 unresolved_reloc
= FALSE
;
2839 unsigned int val
, type
;
2842 /* GD->IE transition. */
2843 BFD_ASSERT (rel
->r_offset
>= 2);
2844 type
= bfd_get_8 (input_bfd
, contents
+ rel
->r_offset
- 2);
2845 BFD_ASSERT (type
== 0x8d || type
== 0x04);
2846 BFD_ASSERT (rel
->r_offset
+ 9 <= input_section
->size
);
2847 BFD_ASSERT (bfd_get_8 (input_bfd
, contents
+ rel
->r_offset
+ 4)
2849 BFD_ASSERT (rel
+ 1 < relend
);
2850 BFD_ASSERT (ELF32_R_TYPE (rel
[1].r_info
) == R_386_PLT32
);
2851 roff
= rel
->r_offset
- 3;
2852 val
= bfd_get_8 (input_bfd
, contents
+ rel
->r_offset
- 1);
2855 /* leal foo(,%reg,1), %eax; call ___tls_get_addr
2857 movl %gs:0, %eax; subl $foo@gottpoff(%reg), %eax. */
2858 BFD_ASSERT (rel
->r_offset
>= 3);
2859 BFD_ASSERT (bfd_get_8 (input_bfd
,
2860 contents
+ rel
->r_offset
- 3)
2862 BFD_ASSERT ((val
& 0xc7) == 0x05 && val
!= (4 << 3));
2867 /* leal foo(%reg), %eax; call ___tls_get_addr; nop
2869 movl %gs:0, %eax; subl $foo@gottpoff(%reg), %eax. */
2870 BFD_ASSERT (rel
->r_offset
+ 10 <= input_section
->size
);
2871 BFD_ASSERT ((val
& 0xf8) == 0x80 && (val
& 7) != 4);
2872 BFD_ASSERT (bfd_get_8 (input_bfd
,
2873 contents
+ rel
->r_offset
+ 9)
2875 roff
= rel
->r_offset
- 2;
2877 memcpy (contents
+ roff
,
2878 "\x65\xa1\0\0\0\0\x2b\x80\0\0\0", 12);
2879 contents
[roff
+ 7] = 0x80 | (val
& 7);
2880 /* If foo is used only with foo@gotntpoff(%reg) and
2881 foo@indntpoff, but not with foo@gottpoff(%reg), change
2882 subl $foo@gottpoff(%reg), %eax
2884 addl $foo@gotntpoff(%reg), %eax. */
2885 if (r_type
== R_386_TLS_GOTIE
)
2887 contents
[roff
+ 6] = 0x03;
2888 if (tls_type
== GOT_TLS_IE_BOTH
)
2891 bfd_put_32 (output_bfd
,
2892 htab
->sgot
->output_section
->vma
2893 + htab
->sgot
->output_offset
+ off
2894 - htab
->sgotplt
->output_section
->vma
2895 - htab
->sgotplt
->output_offset
,
2896 contents
+ roff
+ 8);
2897 /* Skip R_386_PLT32. */
2908 /* LD->LE transition:
2910 leal foo(%reg), %eax; call ___tls_get_addr.
2912 movl %gs:0, %eax; nop; leal 0(%esi,1), %esi. */
2913 BFD_ASSERT (rel
->r_offset
>= 2);
2914 BFD_ASSERT (bfd_get_8 (input_bfd
, contents
+ rel
->r_offset
- 2)
2916 val
= bfd_get_8 (input_bfd
, contents
+ rel
->r_offset
- 1);
2917 BFD_ASSERT ((val
& 0xf8) == 0x80 && (val
& 7) != 4);
2918 BFD_ASSERT (rel
->r_offset
+ 9 <= input_section
->size
);
2919 BFD_ASSERT (bfd_get_8 (input_bfd
, contents
+ rel
->r_offset
+ 4)
2921 BFD_ASSERT (rel
+ 1 < relend
);
2922 BFD_ASSERT (ELF32_R_TYPE (rel
[1].r_info
) == R_386_PLT32
);
2923 memcpy (contents
+ rel
->r_offset
- 2,
2924 "\x65\xa1\0\0\0\0\x90\x8d\x74\x26", 11);
2925 /* Skip R_386_PLT32. */
2930 if (htab
->sgot
== NULL
)
2933 off
= htab
->tls_ldm_got
.offset
;
2938 Elf_Internal_Rela outrel
;
2941 if (htab
->srelgot
== NULL
)
2944 outrel
.r_offset
= (htab
->sgot
->output_section
->vma
2945 + htab
->sgot
->output_offset
+ off
);
2947 bfd_put_32 (output_bfd
, 0,
2948 htab
->sgot
->contents
+ off
);
2949 bfd_put_32 (output_bfd
, 0,
2950 htab
->sgot
->contents
+ off
+ 4);
2951 outrel
.r_info
= ELF32_R_INFO (0, R_386_TLS_DTPMOD32
);
2952 loc
= htab
->srelgot
->contents
;
2953 loc
+= htab
->srelgot
->reloc_count
++ * sizeof (Elf32_External_Rel
);
2954 bfd_elf32_swap_reloc_out (output_bfd
, &outrel
, loc
);
2955 htab
->tls_ldm_got
.offset
|= 1;
2957 relocation
= htab
->sgot
->output_section
->vma
2958 + htab
->sgot
->output_offset
+ off
2959 - htab
->sgotplt
->output_section
->vma
2960 - htab
->sgotplt
->output_offset
;
2961 unresolved_reloc
= FALSE
;
2964 case R_386_TLS_LDO_32
:
2965 if (info
->shared
|| (input_section
->flags
& SEC_CODE
) == 0)
2966 relocation
-= dtpoff_base (info
);
2968 /* When converting LDO to LE, we must negate. */
2969 relocation
= -tpoff (info
, relocation
);
2972 case R_386_TLS_LE_32
:
2976 Elf_Internal_Rela outrel
;
2981 outrel
.r_offset
= rel
->r_offset
2982 + input_section
->output_section
->vma
2983 + input_section
->output_offset
;
2984 if (h
!= NULL
&& h
->dynindx
!= -1)
2988 if (r_type
== R_386_TLS_LE_32
)
2989 outrel
.r_info
= ELF32_R_INFO (indx
, R_386_TLS_TPOFF32
);
2991 outrel
.r_info
= ELF32_R_INFO (indx
, R_386_TLS_TPOFF
);
2992 sreloc
= elf_section_data (input_section
)->sreloc
;
2995 loc
= sreloc
->contents
;
2996 loc
+= sreloc
->reloc_count
++ * sizeof (Elf32_External_Rel
);
2997 bfd_elf32_swap_reloc_out (output_bfd
, &outrel
, loc
);
3000 else if (r_type
== R_386_TLS_LE_32
)
3001 relocation
= dtpoff_base (info
) - relocation
;
3003 relocation
-= dtpoff_base (info
);
3005 else if (r_type
== R_386_TLS_LE_32
)
3006 relocation
= tpoff (info
, relocation
);
3008 relocation
= -tpoff (info
, relocation
);
3015 /* Dynamic relocs are not propagated for SEC_DEBUGGING sections
3016 because such sections are not SEC_ALLOC and thus ld.so will
3017 not process them. */
3018 if (unresolved_reloc
3019 && !((input_section
->flags
& SEC_DEBUGGING
) != 0
3022 (*_bfd_error_handler
)
3023 (_("%B(%A+0x%lx): unresolvable relocation against symbol `%s'"),
3026 (long) rel
->r_offset
,
3027 h
->root
.root
.string
);
3031 r
= _bfd_final_link_relocate (howto
, input_bfd
, input_section
,
3032 contents
, rel
->r_offset
,
3035 if (r
!= bfd_reloc_ok
)
3040 name
= h
->root
.root
.string
;
3043 name
= bfd_elf_string_from_elf_section (input_bfd
,
3044 symtab_hdr
->sh_link
,
3049 name
= bfd_section_name (input_bfd
, sec
);
3052 if (r
== bfd_reloc_overflow
)
3054 if (! ((*info
->callbacks
->reloc_overflow
)
3055 (info
, (h
? &h
->root
: NULL
), name
, howto
->name
,
3056 (bfd_vma
) 0, input_bfd
, input_section
,
3062 (*_bfd_error_handler
)
3063 (_("%B(%A+0x%lx): reloc against `%s': error %d"),
3064 input_bfd
, input_section
,
3065 (long) rel
->r_offset
, name
, (int) r
);
3074 /* Finish up dynamic symbol handling. We set the contents of various
3075 dynamic sections here. */
3078 elf_i386_finish_dynamic_symbol (bfd
*output_bfd
,
3079 struct bfd_link_info
*info
,
3080 struct elf_link_hash_entry
*h
,
3081 Elf_Internal_Sym
*sym
)
3083 struct elf_i386_link_hash_table
*htab
;
3085 htab
= elf_i386_hash_table (info
);
3087 if (h
->plt
.offset
!= (bfd_vma
) -1)
3091 Elf_Internal_Rela rel
;
3094 /* This symbol has an entry in the procedure linkage table. Set
3097 if (h
->dynindx
== -1
3098 || htab
->splt
== NULL
3099 || htab
->sgotplt
== NULL
3100 || htab
->srelplt
== NULL
)
3103 /* Get the index in the procedure linkage table which
3104 corresponds to this symbol. This is the index of this symbol
3105 in all the symbols for which we are making plt entries. The
3106 first entry in the procedure linkage table is reserved. */
3107 plt_index
= h
->plt
.offset
/ PLT_ENTRY_SIZE
- 1;
3109 /* Get the offset into the .got table of the entry that
3110 corresponds to this function. Each .got entry is 4 bytes.
3111 The first three are reserved. */
3112 got_offset
= (plt_index
+ 3) * 4;
3114 /* Fill in the entry in the procedure linkage table. */
3117 memcpy (htab
->splt
->contents
+ h
->plt
.offset
, elf_i386_plt_entry
,
3119 bfd_put_32 (output_bfd
,
3120 (htab
->sgotplt
->output_section
->vma
3121 + htab
->sgotplt
->output_offset
3123 htab
->splt
->contents
+ h
->plt
.offset
+ 2);
3125 if (htab
->is_vxworks
)
3127 int s
, k
, reloc_index
;
3129 /* Create the R_386_32 relocation referencing the GOT
3130 for this PLT entry. */
3132 /* S: Current slot number (zero-based). */
3133 s
= (h
->plt
.offset
- PLT_ENTRY_SIZE
) / PLT_ENTRY_SIZE
;
3134 /* K: Number of relocations for PLTResolve. */
3136 k
= PLTRESOLVE_RELOCS_SHLIB
;
3138 k
= PLTRESOLVE_RELOCS
;
3139 /* Skip the PLTresolve relocations, and the relocations for
3140 the other PLT slots. */
3141 reloc_index
= k
+ s
* PLT_NON_JUMP_SLOT_RELOCS
;
3142 loc
= (htab
->srelplt2
->contents
+ reloc_index
3143 * sizeof (Elf32_External_Rel
));
3145 rel
.r_offset
= (htab
->splt
->output_section
->vma
3146 + htab
->splt
->output_offset
3147 + h
->plt
.offset
+ 2),
3148 rel
.r_info
= ELF32_R_INFO (htab
->hgot
->indx
, R_386_32
);
3149 bfd_elf32_swap_reloc_out (output_bfd
, &rel
, loc
);
3151 /* Create the R_386_32 relocation referencing the beginning of
3152 the PLT for this GOT entry. */
3153 rel
.r_offset
= (htab
->sgotplt
->output_section
->vma
3154 + htab
->sgotplt
->output_offset
3156 rel
.r_info
= ELF32_R_INFO (htab
->hplt
->indx
, R_386_32
);
3157 bfd_elf32_swap_reloc_out (output_bfd
, &rel
,
3158 loc
+ sizeof (Elf32_External_Rel
));
3164 memcpy (htab
->splt
->contents
+ h
->plt
.offset
, elf_i386_pic_plt_entry
,
3166 bfd_put_32 (output_bfd
, got_offset
,
3167 htab
->splt
->contents
+ h
->plt
.offset
+ 2);
3170 bfd_put_32 (output_bfd
, plt_index
* sizeof (Elf32_External_Rel
),
3171 htab
->splt
->contents
+ h
->plt
.offset
+ 7);
3172 bfd_put_32 (output_bfd
, - (h
->plt
.offset
+ PLT_ENTRY_SIZE
),
3173 htab
->splt
->contents
+ h
->plt
.offset
+ 12);
3175 /* Fill in the entry in the global offset table. */
3176 bfd_put_32 (output_bfd
,
3177 (htab
->splt
->output_section
->vma
3178 + htab
->splt
->output_offset
3181 htab
->sgotplt
->contents
+ got_offset
);
3183 /* Fill in the entry in the .rel.plt section. */
3184 rel
.r_offset
= (htab
->sgotplt
->output_section
->vma
3185 + htab
->sgotplt
->output_offset
3187 rel
.r_info
= ELF32_R_INFO (h
->dynindx
, R_386_JUMP_SLOT
);
3188 loc
= htab
->srelplt
->contents
+ plt_index
* sizeof (Elf32_External_Rel
);
3189 bfd_elf32_swap_reloc_out (output_bfd
, &rel
, loc
);
3191 if (!h
->def_regular
)
3193 /* Mark the symbol as undefined, rather than as defined in
3194 the .plt section. Leave the value if there were any
3195 relocations where pointer equality matters (this is a clue
3196 for the dynamic linker, to make function pointer
3197 comparisons work between an application and shared
3198 library), otherwise set it to zero. If a function is only
3199 called from a binary, there is no need to slow down
3200 shared libraries because of that. */
3201 sym
->st_shndx
= SHN_UNDEF
;
3202 if (!h
->pointer_equality_needed
)
3207 if (h
->got
.offset
!= (bfd_vma
) -1
3208 && elf_i386_hash_entry(h
)->tls_type
!= GOT_TLS_GD
3209 && (elf_i386_hash_entry(h
)->tls_type
& GOT_TLS_IE
) == 0)
3211 Elf_Internal_Rela rel
;
3214 /* This symbol has an entry in the global offset table. Set it
3217 if (htab
->sgot
== NULL
|| htab
->srelgot
== NULL
)
3220 rel
.r_offset
= (htab
->sgot
->output_section
->vma
3221 + htab
->sgot
->output_offset
3222 + (h
->got
.offset
& ~(bfd_vma
) 1));
3224 /* If this is a static link, or it is a -Bsymbolic link and the
3225 symbol is defined locally or was forced to be local because
3226 of a version file, we just want to emit a RELATIVE reloc.
3227 The entry in the global offset table will already have been
3228 initialized in the relocate_section function. */
3230 && SYMBOL_REFERENCES_LOCAL (info
, h
))
3232 BFD_ASSERT((h
->got
.offset
& 1) != 0);
3233 rel
.r_info
= ELF32_R_INFO (0, R_386_RELATIVE
);
3237 BFD_ASSERT((h
->got
.offset
& 1) == 0);
3238 bfd_put_32 (output_bfd
, (bfd_vma
) 0,
3239 htab
->sgot
->contents
+ h
->got
.offset
);
3240 rel
.r_info
= ELF32_R_INFO (h
->dynindx
, R_386_GLOB_DAT
);
3243 loc
= htab
->srelgot
->contents
;
3244 loc
+= htab
->srelgot
->reloc_count
++ * sizeof (Elf32_External_Rel
);
3245 bfd_elf32_swap_reloc_out (output_bfd
, &rel
, loc
);
3250 Elf_Internal_Rela rel
;
3253 /* This symbol needs a copy reloc. Set it up. */
3255 if (h
->dynindx
== -1
3256 || (h
->root
.type
!= bfd_link_hash_defined
3257 && h
->root
.type
!= bfd_link_hash_defweak
)
3258 || htab
->srelbss
== NULL
)
3261 rel
.r_offset
= (h
->root
.u
.def
.value
3262 + h
->root
.u
.def
.section
->output_section
->vma
3263 + h
->root
.u
.def
.section
->output_offset
);
3264 rel
.r_info
= ELF32_R_INFO (h
->dynindx
, R_386_COPY
);
3265 loc
= htab
->srelbss
->contents
;
3266 loc
+= htab
->srelbss
->reloc_count
++ * sizeof (Elf32_External_Rel
);
3267 bfd_elf32_swap_reloc_out (output_bfd
, &rel
, loc
);
3270 /* Mark _DYNAMIC and _GLOBAL_OFFSET_TABLE_ as absolute.
3271 On VxWorks, the _GLOBAL_OFFSET_TABLE_ symbol is not absolute: it
3272 is relative to the ".got" section. */
3273 if (strcmp (h
->root
.root
.string
, "_DYNAMIC") == 0
3274 || (strcmp (h
->root
.root
.string
, "_GLOBAL_OFFSET_TABLE_") == 0
3275 && !htab
->is_vxworks
))
3276 sym
->st_shndx
= SHN_ABS
;
3281 /* Used to decide how to sort relocs in an optimal manner for the
3282 dynamic linker, before writing them out. */
3284 static enum elf_reloc_type_class
3285 elf_i386_reloc_type_class (const Elf_Internal_Rela
*rela
)
3287 switch (ELF32_R_TYPE (rela
->r_info
))
3289 case R_386_RELATIVE
:
3290 return reloc_class_relative
;
3291 case R_386_JUMP_SLOT
:
3292 return reloc_class_plt
;
3294 return reloc_class_copy
;
3296 return reloc_class_normal
;
3300 /* Finish up the dynamic sections. */
3303 elf_i386_finish_dynamic_sections (bfd
*output_bfd
,
3304 struct bfd_link_info
*info
)
3306 struct elf_i386_link_hash_table
*htab
;
3310 htab
= elf_i386_hash_table (info
);
3311 dynobj
= htab
->elf
.dynobj
;
3312 sdyn
= bfd_get_section_by_name (dynobj
, ".dynamic");
3314 if (htab
->elf
.dynamic_sections_created
)
3316 Elf32_External_Dyn
*dyncon
, *dynconend
;
3318 if (sdyn
== NULL
|| htab
->sgot
== NULL
)
3321 dyncon
= (Elf32_External_Dyn
*) sdyn
->contents
;
3322 dynconend
= (Elf32_External_Dyn
*) (sdyn
->contents
+ sdyn
->size
);
3323 for (; dyncon
< dynconend
; dyncon
++)
3325 Elf_Internal_Dyn dyn
;
3328 bfd_elf32_swap_dyn_in (dynobj
, dyncon
, &dyn
);
3337 dyn
.d_un
.d_ptr
= s
->output_section
->vma
+ s
->output_offset
;
3342 dyn
.d_un
.d_ptr
= s
->output_section
->vma
+ s
->output_offset
;
3347 dyn
.d_un
.d_val
= s
->size
;
3351 /* My reading of the SVR4 ABI indicates that the
3352 procedure linkage table relocs (DT_JMPREL) should be
3353 included in the overall relocs (DT_REL). This is
3354 what Solaris does. However, UnixWare can not handle
3355 that case. Therefore, we override the DT_RELSZ entry
3356 here to make it not include the JMPREL relocs. */
3360 dyn
.d_un
.d_val
-= s
->size
;
3364 /* We may not be using the standard ELF linker script.
3365 If .rel.plt is the first .rel section, we adjust
3366 DT_REL to not include it. */
3370 if (dyn
.d_un
.d_ptr
!= s
->output_section
->vma
+ s
->output_offset
)
3372 dyn
.d_un
.d_ptr
+= s
->size
;
3376 bfd_elf32_swap_dyn_out (output_bfd
, &dyn
, dyncon
);
3379 /* Fill in the first entry in the procedure linkage table. */
3380 if (htab
->splt
&& htab
->splt
->size
> 0)
3384 memcpy (htab
->splt
->contents
, elf_i386_pic_plt0_entry
,
3385 sizeof (elf_i386_pic_plt0_entry
));
3386 memset (htab
->splt
->contents
+ sizeof (elf_i386_pic_plt0_entry
),
3387 htab
->plt0_pad_byte
,
3388 PLT_ENTRY_SIZE
- sizeof (elf_i386_pic_plt0_entry
));
3392 memcpy (htab
->splt
->contents
, elf_i386_plt0_entry
,
3393 sizeof(elf_i386_plt0_entry
));
3394 memset (htab
->splt
->contents
+ sizeof (elf_i386_plt0_entry
),
3395 htab
->plt0_pad_byte
,
3396 PLT_ENTRY_SIZE
- sizeof (elf_i386_plt0_entry
));
3397 bfd_put_32 (output_bfd
,
3398 (htab
->sgotplt
->output_section
->vma
3399 + htab
->sgotplt
->output_offset
3401 htab
->splt
->contents
+ 2);
3402 bfd_put_32 (output_bfd
,
3403 (htab
->sgotplt
->output_section
->vma
3404 + htab
->sgotplt
->output_offset
3406 htab
->splt
->contents
+ 8);
3408 if (htab
->is_vxworks
)
3410 Elf_Internal_Rela rel
;
3411 struct elf_link_hash_entry
*hgot
;
3413 /* The VxWorks GOT is relocated by the dynamic linker.
3414 Therefore, we must emit relocations rather than
3415 simply computing the values now. */
3416 hgot
= elf_link_hash_lookup (elf_hash_table (info
),
3417 "_GLOBAL_OFFSET_TABLE_",
3418 FALSE
, FALSE
, FALSE
);
3419 /* Generate a relocation for _GLOBAL_OFFSET_TABLE_ + 4.
3420 On IA32 we use REL relocations so the addend goes in
3421 the PLT directly. */
3422 rel
.r_offset
= (htab
->splt
->output_section
->vma
3423 + htab
->splt
->output_offset
3425 rel
.r_info
= ELF32_R_INFO (hgot
->indx
, R_386_32
);
3426 bfd_elf32_swap_reloc_out (output_bfd
, &rel
,
3427 htab
->srelplt2
->contents
);
3428 /* Generate a relocation for _GLOBAL_OFFSET_TABLE_ + 8. */
3429 rel
.r_offset
= (htab
->splt
->output_section
->vma
3430 + htab
->splt
->output_offset
3432 rel
.r_info
= ELF32_R_INFO (hgot
->indx
, R_386_32
);
3433 bfd_elf32_swap_reloc_out (output_bfd
, &rel
,
3434 htab
->srelplt2
->contents
+
3435 sizeof (Elf32_External_Rel
));
3439 /* UnixWare sets the entsize of .plt to 4, although that doesn't
3440 really seem like the right value. */
3441 elf_section_data (htab
->splt
->output_section
)
3442 ->this_hdr
.sh_entsize
= 4;
3444 /* Correct the .rel.plt.unloaded relocations. */
3445 if (htab
->is_vxworks
&& !info
->shared
)
3447 int num_plts
= (htab
->splt
->size
/ PLT_ENTRY_SIZE
) - 1;
3450 p
= htab
->srelplt2
->contents
;
3452 p
+= PLTRESOLVE_RELOCS_SHLIB
* sizeof (Elf32_External_Rel
);
3454 p
+= PLTRESOLVE_RELOCS
* sizeof (Elf32_External_Rel
);
3456 for (; num_plts
; num_plts
--)
3458 Elf_Internal_Rela rel
;
3459 bfd_elf32_swap_reloc_in (output_bfd
, p
, &rel
);
3460 rel
.r_info
= ELF32_R_INFO (htab
->hgot
->indx
, R_386_32
);
3461 bfd_elf32_swap_reloc_out (output_bfd
, &rel
, p
);
3462 p
+= sizeof (Elf32_External_Rel
);
3464 bfd_elf32_swap_reloc_in (output_bfd
, p
, &rel
);
3465 rel
.r_info
= ELF32_R_INFO (htab
->hplt
->indx
, R_386_32
);
3466 bfd_elf32_swap_reloc_out (output_bfd
, &rel
, p
);
3467 p
+= sizeof (Elf32_External_Rel
);
3475 /* Fill in the first three entries in the global offset table. */
3476 if (htab
->sgotplt
->size
> 0)
3478 bfd_put_32 (output_bfd
,
3480 : sdyn
->output_section
->vma
+ sdyn
->output_offset
),
3481 htab
->sgotplt
->contents
);
3482 bfd_put_32 (output_bfd
, 0, htab
->sgotplt
->contents
+ 4);
3483 bfd_put_32 (output_bfd
, 0, htab
->sgotplt
->contents
+ 8);
3486 elf_section_data (htab
->sgotplt
->output_section
)->this_hdr
.sh_entsize
= 4;
3489 if (htab
->sgot
&& htab
->sgot
->size
> 0)
3490 elf_section_data (htab
->sgot
->output_section
)->this_hdr
.sh_entsize
= 4;
3495 /* Return address for Ith PLT stub in section PLT, for relocation REL
3496 or (bfd_vma) -1 if it should not be included. */
3499 elf_i386_plt_sym_val (bfd_vma i
, const asection
*plt
,
3500 const arelent
*rel ATTRIBUTE_UNUSED
)
3502 return plt
->vma
+ (i
+ 1) * PLT_ENTRY_SIZE
;
3506 #define TARGET_LITTLE_SYM bfd_elf32_i386_vec
3507 #define TARGET_LITTLE_NAME "elf32-i386"
3508 #define ELF_ARCH bfd_arch_i386
3509 #define ELF_MACHINE_CODE EM_386
3510 #define ELF_MAXPAGESIZE 0x1000
3512 #define elf_backend_can_gc_sections 1
3513 #define elf_backend_can_refcount 1
3514 #define elf_backend_want_got_plt 1
3515 #define elf_backend_plt_readonly 1
3516 #define elf_backend_want_plt_sym 0
3517 #define elf_backend_got_header_size 12
3519 /* Support RELA for objdump of prelink objects. */
3520 #define elf_info_to_howto elf_i386_info_to_howto_rel
3521 #define elf_info_to_howto_rel elf_i386_info_to_howto_rel
3523 #define bfd_elf32_mkobject elf_i386_mkobject
3525 #define bfd_elf32_bfd_is_local_label_name elf_i386_is_local_label_name
3526 #define bfd_elf32_bfd_link_hash_table_create elf_i386_link_hash_table_create
3527 #define bfd_elf32_bfd_reloc_type_lookup elf_i386_reloc_type_lookup
3529 #define elf_backend_adjust_dynamic_symbol elf_i386_adjust_dynamic_symbol
3530 #define elf_backend_check_relocs elf_i386_check_relocs
3531 #define elf_backend_copy_indirect_symbol elf_i386_copy_indirect_symbol
3532 #define elf_backend_create_dynamic_sections elf_i386_create_dynamic_sections
3533 #define elf_backend_fake_sections elf_i386_fake_sections
3534 #define elf_backend_finish_dynamic_sections elf_i386_finish_dynamic_sections
3535 #define elf_backend_finish_dynamic_symbol elf_i386_finish_dynamic_symbol
3536 #define elf_backend_gc_mark_hook elf_i386_gc_mark_hook
3537 #define elf_backend_gc_sweep_hook elf_i386_gc_sweep_hook
3538 #define elf_backend_grok_prstatus elf_i386_grok_prstatus
3539 #define elf_backend_grok_psinfo elf_i386_grok_psinfo
3540 #define elf_backend_reloc_type_class elf_i386_reloc_type_class
3541 #define elf_backend_relocate_section elf_i386_relocate_section
3542 #define elf_backend_size_dynamic_sections elf_i386_size_dynamic_sections
3543 #define elf_backend_plt_sym_val elf_i386_plt_sym_val
3545 #include "elf32-target.h"
3547 /* FreeBSD support. */
3549 #undef TARGET_LITTLE_SYM
3550 #define TARGET_LITTLE_SYM bfd_elf32_i386_freebsd_vec
3551 #undef TARGET_LITTLE_NAME
3552 #define TARGET_LITTLE_NAME "elf32-i386-freebsd"
3554 /* The kernel recognizes executables as valid only if they carry a
3555 "FreeBSD" label in the ELF header. So we put this label on all
3556 executables and (for simplicity) also all other object files. */
3559 elf_i386_post_process_headers (bfd
*abfd
,
3560 struct bfd_link_info
*info ATTRIBUTE_UNUSED
)
3562 Elf_Internal_Ehdr
*i_ehdrp
;
3564 i_ehdrp
= elf_elfheader (abfd
);
3566 /* Put an ABI label supported by FreeBSD >= 4.1. */
3567 i_ehdrp
->e_ident
[EI_OSABI
] = ELFOSABI_FREEBSD
;
3568 #ifdef OLD_FREEBSD_ABI_LABEL
3569 /* The ABI label supported by FreeBSD <= 4.0 is quite nonstandard. */
3570 memcpy (&i_ehdrp
->e_ident
[EI_ABIVERSION
], "FreeBSD", 8);
3574 #undef elf_backend_post_process_headers
3575 #define elf_backend_post_process_headers elf_i386_post_process_headers
3577 #define elf32_bed elf32_i386_fbsd_bed
3579 #include "elf32-target.h"
3581 /* VxWorks support. */
3583 #undef TARGET_LITTLE_SYM
3584 #define TARGET_LITTLE_SYM bfd_elf32_i386_vxworks_vec
3585 #undef TARGET_LITTLE_NAME
3586 #define TARGET_LITTLE_NAME "elf32-i386-vxworks"
3589 /* Like elf_i386_link_hash_table_create but with tweaks for VxWorks. */
3591 static struct bfd_link_hash_table
*
3592 elf_i386_vxworks_link_hash_table_create (bfd
*abfd
)
3594 struct bfd_link_hash_table
*ret
;
3595 struct elf_i386_link_hash_table
*htab
;
3597 ret
= elf_i386_link_hash_table_create (abfd
);
3600 htab
= (struct elf_i386_link_hash_table
*) ret
;
3601 htab
->is_vxworks
= 1;
3602 htab
->plt0_pad_byte
= 0x90;
3609 /* Tweak magic VxWorks symbols as they are written to the output file. */
3611 elf_i386_vxworks_link_output_symbol_hook (struct bfd_link_info
*info
3614 Elf_Internal_Sym
*sym
,
3615 asection
*input_sec ATTRIBUTE_UNUSED
,
3616 struct elf_link_hash_entry
*h
3619 /* Ignore the first dummy symbol. */
3623 return elf_vxworks_link_output_symbol_hook (name
, sym
);
3626 #undef elf_backend_post_process_headers
3627 #undef bfd_elf32_bfd_link_hash_table_create
3628 #define bfd_elf32_bfd_link_hash_table_create \
3629 elf_i386_vxworks_link_hash_table_create
3630 #undef elf_backend_add_symbol_hook
3631 #define elf_backend_add_symbol_hook \
3632 elf_vxworks_add_symbol_hook
3633 #undef elf_backend_link_output_symbol_hook
3634 #define elf_backend_link_output_symbol_hook \
3635 elf_i386_vxworks_link_output_symbol_hook
3636 #undef elf_backend_emit_relocs
3637 #define elf_backend_emit_relocs elf_vxworks_emit_relocs
3638 #undef elf_backend_final_write_processing
3639 #define elf_backend_final_write_processing \
3640 elf_vxworks_final_write_processing
3642 /* On VxWorks, we emit relocations against _PROCEDURE_LINKAGE_TABLE_, so
3644 #undef elf_backend_want_plt_sym
3645 #define elf_backend_want_plt_sym 1
3648 #define elf32_bed elf32_i386_vxworks_bed
3650 #include "elf32-target.h"