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 htab
= elf_i386_hash_table (info
);
1436 /* If there aren't any dynamic relocs in read-only sections, then
1437 we can keep the dynamic relocs and avoid the copy reloc. This
1438 doesn't work on VxWorks, where we can not have dynamic relocations
1439 (other than copy and jump slot relocations) in an executable. */
1440 if (ELIMINATE_COPY_RELOCS
&& !htab
->is_vxworks
)
1442 struct elf_i386_link_hash_entry
* eh
;
1443 struct elf_i386_dyn_relocs
*p
;
1445 eh
= (struct elf_i386_link_hash_entry
*) h
;
1446 for (p
= eh
->dyn_relocs
; p
!= NULL
; p
= p
->next
)
1448 s
= p
->sec
->output_section
;
1449 if (s
!= NULL
&& (s
->flags
& SEC_READONLY
) != 0)
1460 /* We must allocate the symbol in our .dynbss section, which will
1461 become part of the .bss section of the executable. There will be
1462 an entry for this symbol in the .dynsym section. The dynamic
1463 object will contain position independent code, so all references
1464 from the dynamic object to this symbol will go through the global
1465 offset table. The dynamic linker will use the .dynsym entry to
1466 determine the address it must put in the global offset table, so
1467 both the dynamic object and the regular object will refer to the
1468 same memory location for the variable. */
1470 /* We must generate a R_386_COPY reloc to tell the dynamic linker to
1471 copy the initial value out of the dynamic object and into the
1472 runtime process image. */
1473 if ((h
->root
.u
.def
.section
->flags
& SEC_ALLOC
) != 0)
1475 htab
->srelbss
->size
+= sizeof (Elf32_External_Rel
);
1479 /* We need to figure out the alignment required for this symbol. I
1480 have no idea how ELF linkers handle this. */
1481 power_of_two
= bfd_log2 (h
->size
);
1482 if (power_of_two
> 3)
1485 /* Apply the required alignment. */
1487 s
->size
= BFD_ALIGN (s
->size
, (bfd_size_type
) (1 << power_of_two
));
1488 if (power_of_two
> bfd_get_section_alignment (htab
->elf
.dynobj
, s
))
1490 if (! bfd_set_section_alignment (htab
->elf
.dynobj
, s
, power_of_two
))
1494 /* Define the symbol as being at this point in the section. */
1495 h
->root
.u
.def
.section
= s
;
1496 h
->root
.u
.def
.value
= s
->size
;
1498 /* Increment the section size to make room for the symbol. */
1504 /* Allocate space in .plt, .got and associated reloc sections for
1508 allocate_dynrelocs (struct elf_link_hash_entry
*h
, void *inf
)
1510 struct bfd_link_info
*info
;
1511 struct elf_i386_link_hash_table
*htab
;
1512 struct elf_i386_link_hash_entry
*eh
;
1513 struct elf_i386_dyn_relocs
*p
;
1515 if (h
->root
.type
== bfd_link_hash_indirect
)
1518 if (h
->root
.type
== bfd_link_hash_warning
)
1519 /* When warning symbols are created, they **replace** the "real"
1520 entry in the hash table, thus we never get to see the real
1521 symbol in a hash traversal. So look at it now. */
1522 h
= (struct elf_link_hash_entry
*) h
->root
.u
.i
.link
;
1524 info
= (struct bfd_link_info
*) inf
;
1525 htab
= elf_i386_hash_table (info
);
1527 if (htab
->elf
.dynamic_sections_created
1528 && h
->plt
.refcount
> 0)
1530 /* Make sure this symbol is output as a dynamic symbol.
1531 Undefined weak syms won't yet be marked as dynamic. */
1532 if (h
->dynindx
== -1
1533 && !h
->forced_local
)
1535 if (! bfd_elf_link_record_dynamic_symbol (info
, h
))
1540 || WILL_CALL_FINISH_DYNAMIC_SYMBOL (1, 0, h
))
1542 asection
*s
= htab
->splt
;
1544 /* If this is the first .plt entry, make room for the special
1547 s
->size
+= PLT_ENTRY_SIZE
;
1549 h
->plt
.offset
= s
->size
;
1551 /* If this symbol is not defined in a regular file, and we are
1552 not generating a shared library, then set the symbol to this
1553 location in the .plt. This is required to make function
1554 pointers compare as equal between the normal executable and
1555 the shared library. */
1559 h
->root
.u
.def
.section
= s
;
1560 h
->root
.u
.def
.value
= h
->plt
.offset
;
1563 /* Make room for this entry. */
1564 s
->size
+= PLT_ENTRY_SIZE
;
1566 /* We also need to make an entry in the .got.plt section, which
1567 will be placed in the .got section by the linker script. */
1568 htab
->sgotplt
->size
+= 4;
1570 /* We also need to make an entry in the .rel.plt section. */
1571 htab
->srelplt
->size
+= sizeof (Elf32_External_Rel
);
1573 if (htab
->is_vxworks
&& !info
->shared
)
1575 /* VxWorks has a second set of relocations for each PLT entry
1576 in executables. They go in a separate relocation section,
1577 which is processed by the kernel loader. */
1579 /* There are two relocations for the initial PLT entry: an
1580 R_386_32 relocation for _GLOBAL_OFFSET_TABLE_ + 4 and an
1581 R_386_32 relocation for _GLOBAL_OFFSET_TABLE_ + 8. */
1583 if (h
->plt
.offset
== PLT_ENTRY_SIZE
)
1584 htab
->srelplt2
->size
+= (sizeof (Elf32_External_Rel
) * 2);
1586 /* There are two extra relocations for each subsequent PLT entry:
1587 an R_386_32 relocation for the GOT entry, and an R_386_32
1588 relocation for the PLT entry. */
1590 htab
->srelplt2
->size
+= (sizeof (Elf32_External_Rel
) * 2);
1595 h
->plt
.offset
= (bfd_vma
) -1;
1601 h
->plt
.offset
= (bfd_vma
) -1;
1605 /* If R_386_TLS_{IE_32,IE,GOTIE} symbol is now local to the binary,
1606 make it a R_386_TLS_LE_32 requiring no TLS entry. */
1607 if (h
->got
.refcount
> 0
1610 && (elf_i386_hash_entry(h
)->tls_type
& GOT_TLS_IE
))
1611 h
->got
.offset
= (bfd_vma
) -1;
1612 else if (h
->got
.refcount
> 0)
1616 int tls_type
= elf_i386_hash_entry(h
)->tls_type
;
1618 /* Make sure this symbol is output as a dynamic symbol.
1619 Undefined weak syms won't yet be marked as dynamic. */
1620 if (h
->dynindx
== -1
1621 && !h
->forced_local
)
1623 if (! bfd_elf_link_record_dynamic_symbol (info
, h
))
1628 h
->got
.offset
= s
->size
;
1630 /* R_386_TLS_GD needs 2 consecutive GOT slots. */
1631 if (tls_type
== GOT_TLS_GD
|| tls_type
== GOT_TLS_IE_BOTH
)
1633 dyn
= htab
->elf
.dynamic_sections_created
;
1634 /* R_386_TLS_IE_32 needs one dynamic relocation,
1635 R_386_TLS_IE resp. R_386_TLS_GOTIE needs one dynamic relocation,
1636 (but if both R_386_TLS_IE_32 and R_386_TLS_IE is present, we
1637 need two), R_386_TLS_GD needs one if local symbol and two if
1639 if (tls_type
== GOT_TLS_IE_BOTH
)
1640 htab
->srelgot
->size
+= 2 * sizeof (Elf32_External_Rel
);
1641 else if ((tls_type
== GOT_TLS_GD
&& h
->dynindx
== -1)
1642 || (tls_type
& GOT_TLS_IE
))
1643 htab
->srelgot
->size
+= sizeof (Elf32_External_Rel
);
1644 else if (tls_type
== GOT_TLS_GD
)
1645 htab
->srelgot
->size
+= 2 * sizeof (Elf32_External_Rel
);
1646 else if ((ELF_ST_VISIBILITY (h
->other
) == STV_DEFAULT
1647 || h
->root
.type
!= bfd_link_hash_undefweak
)
1649 || WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn
, 0, h
)))
1650 htab
->srelgot
->size
+= sizeof (Elf32_External_Rel
);
1653 h
->got
.offset
= (bfd_vma
) -1;
1655 eh
= (struct elf_i386_link_hash_entry
*) h
;
1656 if (eh
->dyn_relocs
== NULL
)
1659 /* In the shared -Bsymbolic case, discard space allocated for
1660 dynamic pc-relative relocs against symbols which turn out to be
1661 defined in regular objects. For the normal shared case, discard
1662 space for pc-relative relocs that have become local due to symbol
1663 visibility changes. */
1667 /* The only reloc that uses pc_count is R_386_PC32, which will
1668 appear on a call or on something like ".long foo - .". We
1669 want calls to protected symbols to resolve directly to the
1670 function rather than going via the plt. If people want
1671 function pointer comparisons to work as expected then they
1672 should avoid writing assembly like ".long foo - .". */
1673 if (SYMBOL_CALLS_LOCAL (info
, h
))
1675 struct elf_i386_dyn_relocs
**pp
;
1677 for (pp
= &eh
->dyn_relocs
; (p
= *pp
) != NULL
; )
1679 p
->count
-= p
->pc_count
;
1688 /* Also discard relocs on undefined weak syms with non-default
1690 if (ELF_ST_VISIBILITY (h
->other
) != STV_DEFAULT
1691 && h
->root
.type
== bfd_link_hash_undefweak
)
1692 eh
->dyn_relocs
= NULL
;
1694 else if (ELIMINATE_COPY_RELOCS
)
1696 /* For the non-shared case, discard space for relocs against
1697 symbols which turn out to need copy relocs or are not
1703 || (htab
->elf
.dynamic_sections_created
1704 && (h
->root
.type
== bfd_link_hash_undefweak
1705 || h
->root
.type
== bfd_link_hash_undefined
))))
1707 /* Make sure this symbol is output as a dynamic symbol.
1708 Undefined weak syms won't yet be marked as dynamic. */
1709 if (h
->dynindx
== -1
1710 && !h
->forced_local
)
1712 if (! bfd_elf_link_record_dynamic_symbol (info
, h
))
1716 /* If that succeeded, we know we'll be keeping all the
1718 if (h
->dynindx
!= -1)
1722 eh
->dyn_relocs
= NULL
;
1727 /* Finally, allocate space. */
1728 for (p
= eh
->dyn_relocs
; p
!= NULL
; p
= p
->next
)
1730 asection
*sreloc
= elf_section_data (p
->sec
)->sreloc
;
1731 sreloc
->size
+= p
->count
* sizeof (Elf32_External_Rel
);
1737 /* Find any dynamic relocs that apply to read-only sections. */
1740 readonly_dynrelocs (struct elf_link_hash_entry
*h
, void *inf
)
1742 struct elf_i386_link_hash_entry
*eh
;
1743 struct elf_i386_dyn_relocs
*p
;
1745 if (h
->root
.type
== bfd_link_hash_warning
)
1746 h
= (struct elf_link_hash_entry
*) h
->root
.u
.i
.link
;
1748 eh
= (struct elf_i386_link_hash_entry
*) h
;
1749 for (p
= eh
->dyn_relocs
; p
!= NULL
; p
= p
->next
)
1751 asection
*s
= p
->sec
->output_section
;
1753 if (s
!= NULL
&& (s
->flags
& SEC_READONLY
) != 0)
1755 struct bfd_link_info
*info
= (struct bfd_link_info
*) inf
;
1757 info
->flags
|= DF_TEXTREL
;
1759 /* Not an error, just cut short the traversal. */
1766 /* Set the sizes of the dynamic sections. */
1769 elf_i386_size_dynamic_sections (bfd
*output_bfd ATTRIBUTE_UNUSED
,
1770 struct bfd_link_info
*info
)
1772 struct elf_i386_link_hash_table
*htab
;
1778 htab
= elf_i386_hash_table (info
);
1779 dynobj
= htab
->elf
.dynobj
;
1783 if (htab
->elf
.dynamic_sections_created
)
1785 /* Set the contents of the .interp section to the interpreter. */
1786 if (info
->executable
)
1788 s
= bfd_get_section_by_name (dynobj
, ".interp");
1791 s
->size
= sizeof ELF_DYNAMIC_INTERPRETER
;
1792 s
->contents
= (unsigned char *) ELF_DYNAMIC_INTERPRETER
;
1796 /* Set up .got offsets for local syms, and space for local dynamic
1798 for (ibfd
= info
->input_bfds
; ibfd
!= NULL
; ibfd
= ibfd
->link_next
)
1800 bfd_signed_vma
*local_got
;
1801 bfd_signed_vma
*end_local_got
;
1802 char *local_tls_type
;
1803 bfd_size_type locsymcount
;
1804 Elf_Internal_Shdr
*symtab_hdr
;
1807 if (bfd_get_flavour (ibfd
) != bfd_target_elf_flavour
)
1810 for (s
= ibfd
->sections
; s
!= NULL
; s
= s
->next
)
1812 struct elf_i386_dyn_relocs
*p
;
1814 for (p
= *((struct elf_i386_dyn_relocs
**)
1815 &elf_section_data (s
)->local_dynrel
);
1819 if (!bfd_is_abs_section (p
->sec
)
1820 && bfd_is_abs_section (p
->sec
->output_section
))
1822 /* Input section has been discarded, either because
1823 it is a copy of a linkonce section or due to
1824 linker script /DISCARD/, so we'll be discarding
1827 else if (p
->count
!= 0)
1829 srel
= elf_section_data (p
->sec
)->sreloc
;
1830 srel
->size
+= p
->count
* sizeof (Elf32_External_Rel
);
1831 if ((p
->sec
->output_section
->flags
& SEC_READONLY
) != 0)
1832 info
->flags
|= DF_TEXTREL
;
1837 local_got
= elf_local_got_refcounts (ibfd
);
1841 symtab_hdr
= &elf_tdata (ibfd
)->symtab_hdr
;
1842 locsymcount
= symtab_hdr
->sh_info
;
1843 end_local_got
= local_got
+ locsymcount
;
1844 local_tls_type
= elf_i386_local_got_tls_type (ibfd
);
1846 srel
= htab
->srelgot
;
1847 for (; local_got
< end_local_got
; ++local_got
, ++local_tls_type
)
1851 *local_got
= s
->size
;
1853 if (*local_tls_type
== GOT_TLS_GD
1854 || *local_tls_type
== GOT_TLS_IE_BOTH
)
1857 || *local_tls_type
== GOT_TLS_GD
1858 || (*local_tls_type
& GOT_TLS_IE
))
1860 if (*local_tls_type
== GOT_TLS_IE_BOTH
)
1861 srel
->size
+= 2 * sizeof (Elf32_External_Rel
);
1863 srel
->size
+= sizeof (Elf32_External_Rel
);
1867 *local_got
= (bfd_vma
) -1;
1871 if (htab
->tls_ldm_got
.refcount
> 0)
1873 /* Allocate 2 got entries and 1 dynamic reloc for R_386_TLS_LDM
1875 htab
->tls_ldm_got
.offset
= htab
->sgot
->size
;
1876 htab
->sgot
->size
+= 8;
1877 htab
->srelgot
->size
+= sizeof (Elf32_External_Rel
);
1880 htab
->tls_ldm_got
.offset
= -1;
1882 if (htab
->is_vxworks
)
1884 /* Save the GOT and PLT symbols in the hash table for easy access.
1885 Mark them as having relocations; they might not, but we won't
1886 know for sure until we build the GOT in finish_dynamic_symbol. */
1888 htab
->hgot
= elf_link_hash_lookup (elf_hash_table (info
),
1889 "_GLOBAL_OFFSET_TABLE_",
1890 FALSE
, FALSE
, FALSE
);
1892 htab
->hgot
->indx
= -2;
1893 htab
->hplt
= elf_link_hash_lookup (elf_hash_table (info
),
1894 "_PROCEDURE_LINKAGE_TABLE_",
1895 FALSE
, FALSE
, FALSE
);
1897 htab
->hplt
->indx
= -2;
1899 if (htab
->is_vxworks
&& htab
->hplt
&& htab
->splt
->flags
& SEC_CODE
)
1900 htab
->hplt
->type
= STT_FUNC
;
1903 /* Allocate global sym .plt and .got entries, and space for global
1904 sym dynamic relocs. */
1905 elf_link_hash_traverse (&htab
->elf
, allocate_dynrelocs
, (PTR
) info
);
1907 /* We now have determined the sizes of the various dynamic sections.
1908 Allocate memory for them. */
1910 for (s
= dynobj
->sections
; s
!= NULL
; s
= s
->next
)
1912 bfd_boolean strip_section
= TRUE
;
1914 if ((s
->flags
& SEC_LINKER_CREATED
) == 0)
1919 || s
== htab
->sgotplt
1920 || s
== htab
->sdynbss
)
1922 /* Strip this section if we don't need it; see the
1924 /* We'd like to strip these sections if they aren't needed, but if
1925 we've exported dynamic symbols from them we must leave them.
1926 It's too late to tell BFD to get rid of the symbols. */
1928 if (htab
->hplt
!= NULL
)
1929 strip_section
= FALSE
;
1931 else if (strncmp (bfd_get_section_name (dynobj
, s
), ".rel", 4) == 0)
1933 if (s
->size
!= 0 && s
!= htab
->srelplt
&& s
!= htab
->srelplt2
)
1936 /* We use the reloc_count field as a counter if we need
1937 to copy relocs into the output file. */
1942 /* It's not one of our sections, so don't allocate space. */
1946 if (s
->size
== 0 && strip_section
)
1948 /* If we don't need this section, strip it from the
1949 output file. This is mostly to handle .rel.bss and
1950 .rel.plt. We must create both sections in
1951 create_dynamic_sections, because they must be created
1952 before the linker maps input sections to output
1953 sections. The linker does that before
1954 adjust_dynamic_symbol is called, and it is that
1955 function which decides whether anything needs to go
1956 into these sections. */
1958 s
->flags
|= SEC_EXCLUDE
;
1962 /* Allocate memory for the section contents. We use bfd_zalloc
1963 here in case unused entries are not reclaimed before the
1964 section's contents are written out. This should not happen,
1965 but this way if it does, we get a R_386_NONE reloc instead
1967 s
->contents
= bfd_zalloc (dynobj
, s
->size
);
1968 if (s
->contents
== NULL
)
1972 if (htab
->elf
.dynamic_sections_created
)
1974 /* Add some entries to the .dynamic section. We fill in the
1975 values later, in elf_i386_finish_dynamic_sections, but we
1976 must add the entries now so that we get the correct size for
1977 the .dynamic section. The DT_DEBUG entry is filled in by the
1978 dynamic linker and used by the debugger. */
1979 #define add_dynamic_entry(TAG, VAL) \
1980 _bfd_elf_add_dynamic_entry (info, TAG, VAL)
1982 if (info
->executable
)
1984 if (!add_dynamic_entry (DT_DEBUG
, 0))
1988 if (htab
->splt
->size
!= 0)
1990 if (!add_dynamic_entry (DT_PLTGOT
, 0)
1991 || !add_dynamic_entry (DT_PLTRELSZ
, 0)
1992 || !add_dynamic_entry (DT_PLTREL
, DT_REL
)
1993 || !add_dynamic_entry (DT_JMPREL
, 0))
1999 if (!add_dynamic_entry (DT_REL
, 0)
2000 || !add_dynamic_entry (DT_RELSZ
, 0)
2001 || !add_dynamic_entry (DT_RELENT
, sizeof (Elf32_External_Rel
)))
2004 /* If any dynamic relocs apply to a read-only section,
2005 then we need a DT_TEXTREL entry. */
2006 if ((info
->flags
& DF_TEXTREL
) == 0)
2007 elf_link_hash_traverse (&htab
->elf
, readonly_dynrelocs
,
2010 if ((info
->flags
& DF_TEXTREL
) != 0)
2012 if (!add_dynamic_entry (DT_TEXTREL
, 0))
2017 #undef add_dynamic_entry
2022 /* Set the correct type for an x86 ELF section. We do this by the
2023 section name, which is a hack, but ought to work. */
2026 elf_i386_fake_sections (bfd
*abfd ATTRIBUTE_UNUSED
,
2027 Elf_Internal_Shdr
*hdr
,
2030 register const char *name
;
2032 name
= bfd_get_section_name (abfd
, sec
);
2034 /* This is an ugly, but unfortunately necessary hack that is
2035 needed when producing EFI binaries on x86. It tells
2036 elf.c:elf_fake_sections() not to consider ".reloc" as a section
2037 containing ELF relocation info. We need this hack in order to
2038 be able to generate ELF binaries that can be translated into
2039 EFI applications (which are essentially COFF objects). Those
2040 files contain a COFF ".reloc" section inside an ELFNN object,
2041 which would normally cause BFD to segfault because it would
2042 attempt to interpret this section as containing relocation
2043 entries for section "oc". With this hack enabled, ".reloc"
2044 will be treated as a normal data section, which will avoid the
2045 segfault. However, you won't be able to create an ELFNN binary
2046 with a section named "oc" that needs relocations, but that's
2047 the kind of ugly side-effects you get when detecting section
2048 types based on their names... In practice, this limitation is
2049 unlikely to bite. */
2050 if (strcmp (name
, ".reloc") == 0)
2051 hdr
->sh_type
= SHT_PROGBITS
;
2056 /* Return the base VMA address which should be subtracted from real addresses
2057 when resolving @dtpoff relocation.
2058 This is PT_TLS segment p_vaddr. */
2061 dtpoff_base (struct bfd_link_info
*info
)
2063 /* If tls_sec is NULL, we should have signalled an error already. */
2064 if (elf_hash_table (info
)->tls_sec
== NULL
)
2066 return elf_hash_table (info
)->tls_sec
->vma
;
2069 /* Return the relocation value for @tpoff relocation
2070 if STT_TLS virtual address is ADDRESS. */
2073 tpoff (struct bfd_link_info
*info
, bfd_vma address
)
2075 struct elf_link_hash_table
*htab
= elf_hash_table (info
);
2077 /* If tls_sec is NULL, we should have signalled an error already. */
2078 if (htab
->tls_sec
== NULL
)
2080 return htab
->tls_size
+ htab
->tls_sec
->vma
- address
;
2083 /* Relocate an i386 ELF section. */
2086 elf_i386_relocate_section (bfd
*output_bfd
,
2087 struct bfd_link_info
*info
,
2089 asection
*input_section
,
2091 Elf_Internal_Rela
*relocs
,
2092 Elf_Internal_Sym
*local_syms
,
2093 asection
**local_sections
)
2095 struct elf_i386_link_hash_table
*htab
;
2096 Elf_Internal_Shdr
*symtab_hdr
;
2097 struct elf_link_hash_entry
**sym_hashes
;
2098 bfd_vma
*local_got_offsets
;
2099 Elf_Internal_Rela
*rel
;
2100 Elf_Internal_Rela
*relend
;
2102 htab
= elf_i386_hash_table (info
);
2103 symtab_hdr
= &elf_tdata (input_bfd
)->symtab_hdr
;
2104 sym_hashes
= elf_sym_hashes (input_bfd
);
2105 local_got_offsets
= elf_local_got_offsets (input_bfd
);
2108 relend
= relocs
+ input_section
->reloc_count
;
2109 for (; rel
< relend
; rel
++)
2111 unsigned int r_type
;
2112 reloc_howto_type
*howto
;
2113 unsigned long r_symndx
;
2114 struct elf_link_hash_entry
*h
;
2115 Elf_Internal_Sym
*sym
;
2119 bfd_boolean unresolved_reloc
;
2120 bfd_reloc_status_type r
;
2124 r_type
= ELF32_R_TYPE (rel
->r_info
);
2125 if (r_type
== R_386_GNU_VTINHERIT
2126 || r_type
== R_386_GNU_VTENTRY
)
2129 if ((indx
= r_type
) >= R_386_standard
2130 && ((indx
= r_type
- R_386_ext_offset
) - R_386_standard
2131 >= R_386_ext
- R_386_standard
)
2132 && ((indx
= r_type
- R_386_tls_offset
) - R_386_ext
2133 >= R_386_tls
- R_386_ext
))
2135 (*_bfd_error_handler
)
2136 (_("%B: unrecognized relocation (0x%x) in section `%A'"),
2137 input_bfd
, input_section
, r_type
);
2138 bfd_set_error (bfd_error_bad_value
);
2141 howto
= elf_howto_table
+ indx
;
2143 r_symndx
= ELF32_R_SYM (rel
->r_info
);
2145 if (info
->relocatable
)
2150 /* This is a relocatable link. We don't have to change
2151 anything, unless the reloc is against a section symbol,
2152 in which case we have to adjust according to where the
2153 section symbol winds up in the output section. */
2154 if (r_symndx
>= symtab_hdr
->sh_info
)
2157 sym
= local_syms
+ r_symndx
;
2158 if (ELF_ST_TYPE (sym
->st_info
) != STT_SECTION
)
2161 sec
= local_sections
[r_symndx
];
2162 val
= sec
->output_offset
;
2166 where
= contents
+ rel
->r_offset
;
2167 switch (howto
->size
)
2169 /* FIXME: overflow checks. */
2171 val
+= bfd_get_8 (input_bfd
, where
);
2172 bfd_put_8 (input_bfd
, val
, where
);
2175 val
+= bfd_get_16 (input_bfd
, where
);
2176 bfd_put_16 (input_bfd
, val
, where
);
2179 val
+= bfd_get_32 (input_bfd
, where
);
2180 bfd_put_32 (input_bfd
, val
, where
);
2188 /* This is a final link. */
2192 unresolved_reloc
= FALSE
;
2193 if (r_symndx
< symtab_hdr
->sh_info
)
2195 sym
= local_syms
+ r_symndx
;
2196 sec
= local_sections
[r_symndx
];
2197 relocation
= (sec
->output_section
->vma
2198 + sec
->output_offset
2200 if ((sec
->flags
& SEC_MERGE
)
2201 && ELF_ST_TYPE (sym
->st_info
) == STT_SECTION
)
2205 bfd_byte
*where
= contents
+ rel
->r_offset
;
2207 switch (howto
->size
)
2210 addend
= bfd_get_8 (input_bfd
, where
);
2211 if (howto
->pc_relative
)
2213 addend
= (addend
^ 0x80) - 0x80;
2218 addend
= bfd_get_16 (input_bfd
, where
);
2219 if (howto
->pc_relative
)
2221 addend
= (addend
^ 0x8000) - 0x8000;
2226 addend
= bfd_get_32 (input_bfd
, where
);
2227 if (howto
->pc_relative
)
2229 addend
= (addend
^ 0x80000000) - 0x80000000;
2238 addend
= _bfd_elf_rel_local_sym (output_bfd
, sym
, &msec
, addend
);
2239 addend
-= relocation
;
2240 addend
+= msec
->output_section
->vma
+ msec
->output_offset
;
2242 switch (howto
->size
)
2245 /* FIXME: overflow checks. */
2246 if (howto
->pc_relative
)
2248 bfd_put_8 (input_bfd
, addend
, where
);
2251 if (howto
->pc_relative
)
2253 bfd_put_16 (input_bfd
, addend
, where
);
2256 if (howto
->pc_relative
)
2258 bfd_put_32 (input_bfd
, addend
, where
);
2267 RELOC_FOR_GLOBAL_SYMBOL (info
, input_bfd
, input_section
, rel
,
2268 r_symndx
, symtab_hdr
, sym_hashes
,
2270 unresolved_reloc
, warned
);
2276 /* Relocation is to the entry for this symbol in the global
2278 if (htab
->sgot
== NULL
)
2285 off
= h
->got
.offset
;
2286 dyn
= htab
->elf
.dynamic_sections_created
;
2287 if (! WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn
, info
->shared
, h
)
2289 && SYMBOL_REFERENCES_LOCAL (info
, h
))
2290 || (ELF_ST_VISIBILITY (h
->other
)
2291 && h
->root
.type
== bfd_link_hash_undefweak
))
2293 /* This is actually a static link, or it is a
2294 -Bsymbolic link and the symbol is defined
2295 locally, or the symbol was forced to be local
2296 because of a version file. We must initialize
2297 this entry in the global offset table. Since the
2298 offset must always be a multiple of 4, we use the
2299 least significant bit to record whether we have
2300 initialized it already.
2302 When doing a dynamic link, we create a .rel.got
2303 relocation entry to initialize the value. This
2304 is done in the finish_dynamic_symbol routine. */
2309 bfd_put_32 (output_bfd
, relocation
,
2310 htab
->sgot
->contents
+ off
);
2315 unresolved_reloc
= FALSE
;
2319 if (local_got_offsets
== NULL
)
2322 off
= local_got_offsets
[r_symndx
];
2324 /* The offset must always be a multiple of 4. We use
2325 the least significant bit to record whether we have
2326 already generated the necessary reloc. */
2331 bfd_put_32 (output_bfd
, relocation
,
2332 htab
->sgot
->contents
+ off
);
2337 Elf_Internal_Rela outrel
;
2344 outrel
.r_offset
= (htab
->sgot
->output_section
->vma
2345 + htab
->sgot
->output_offset
2347 outrel
.r_info
= ELF32_R_INFO (0, R_386_RELATIVE
);
2349 loc
+= s
->reloc_count
++ * sizeof (Elf32_External_Rel
);
2350 bfd_elf32_swap_reloc_out (output_bfd
, &outrel
, loc
);
2353 local_got_offsets
[r_symndx
] |= 1;
2357 if (off
>= (bfd_vma
) -2)
2360 relocation
= htab
->sgot
->output_section
->vma
2361 + htab
->sgot
->output_offset
+ off
2362 - htab
->sgotplt
->output_section
->vma
2363 - htab
->sgotplt
->output_offset
;
2367 /* Relocation is relative to the start of the global offset
2370 /* Check to make sure it isn't a protected function symbol
2371 for shared library since it may not be local when used
2372 as function address. */
2374 && !info
->executable
2377 && h
->type
== STT_FUNC
2378 && ELF_ST_VISIBILITY (h
->other
) == STV_PROTECTED
)
2380 (*_bfd_error_handler
)
2381 (_("%B: relocation R_386_GOTOFF against protected function `%s' can not be used when making a shared object"),
2382 input_bfd
, h
->root
.root
.string
);
2383 bfd_set_error (bfd_error_bad_value
);
2387 /* Note that sgot is not involved in this
2388 calculation. We always want the start of .got.plt. If we
2389 defined _GLOBAL_OFFSET_TABLE_ in a different way, as is
2390 permitted by the ABI, we might have to change this
2392 relocation
-= htab
->sgotplt
->output_section
->vma
2393 + htab
->sgotplt
->output_offset
;
2397 /* Use global offset table as symbol value. */
2398 relocation
= htab
->sgotplt
->output_section
->vma
2399 + htab
->sgotplt
->output_offset
;
2400 unresolved_reloc
= FALSE
;
2404 /* Relocation is to the entry for this symbol in the
2405 procedure linkage table. */
2407 /* Resolve a PLT32 reloc against a local symbol directly,
2408 without using the procedure linkage table. */
2412 if (h
->plt
.offset
== (bfd_vma
) -1
2413 || htab
->splt
== NULL
)
2415 /* We didn't make a PLT entry for this symbol. This
2416 happens when statically linking PIC code, or when
2417 using -Bsymbolic. */
2421 relocation
= (htab
->splt
->output_section
->vma
2422 + htab
->splt
->output_offset
2424 unresolved_reloc
= FALSE
;
2429 /* r_symndx will be zero only for relocs against symbols
2430 from removed linkonce sections, or sections discarded by
2434 /* Zero the section contents. eh_frame generated by old
2435 versions of gcc isn't edited by elf-eh-frame.c, so
2436 FDEs for discarded linkonce functions might remain.
2437 Putting zeros here will zero such FDE's address range.
2438 This is a hint to unwinders and other consumers of
2439 exception handling info that the FDE is invalid. */
2440 bfd_put_32 (input_bfd
, 0, contents
+ rel
->r_offset
);
2444 if ((input_section
->flags
& SEC_ALLOC
) == 0)
2449 || ELF_ST_VISIBILITY (h
->other
) == STV_DEFAULT
2450 || h
->root
.type
!= bfd_link_hash_undefweak
)
2451 && (r_type
!= R_386_PC32
2452 || !SYMBOL_CALLS_LOCAL (info
, h
)))
2453 || (ELIMINATE_COPY_RELOCS
2460 || h
->root
.type
== bfd_link_hash_undefweak
2461 || h
->root
.type
== bfd_link_hash_undefined
)))
2463 Elf_Internal_Rela outrel
;
2465 bfd_boolean skip
, relocate
;
2468 /* When generating a shared object, these relocations
2469 are copied into the output file to be resolved at run
2476 _bfd_elf_section_offset (output_bfd
, info
, input_section
,
2478 if (outrel
.r_offset
== (bfd_vma
) -1)
2480 else if (outrel
.r_offset
== (bfd_vma
) -2)
2481 skip
= TRUE
, relocate
= TRUE
;
2482 outrel
.r_offset
+= (input_section
->output_section
->vma
2483 + input_section
->output_offset
);
2486 memset (&outrel
, 0, sizeof outrel
);
2489 && (r_type
== R_386_PC32
2492 || !h
->def_regular
))
2493 outrel
.r_info
= ELF32_R_INFO (h
->dynindx
, r_type
);
2496 /* This symbol is local, or marked to become local. */
2498 outrel
.r_info
= ELF32_R_INFO (0, R_386_RELATIVE
);
2501 sreloc
= elf_section_data (input_section
)->sreloc
;
2505 loc
= sreloc
->contents
;
2506 loc
+= sreloc
->reloc_count
++ * sizeof (Elf32_External_Rel
);
2507 bfd_elf32_swap_reloc_out (output_bfd
, &outrel
, loc
);
2509 /* If this reloc is against an external symbol, we do
2510 not want to fiddle with the addend. Otherwise, we
2511 need to include the symbol value so that it becomes
2512 an addend for the dynamic reloc. */
2521 Elf_Internal_Rela outrel
;
2525 outrel
.r_offset
= rel
->r_offset
2526 + input_section
->output_section
->vma
2527 + input_section
->output_offset
;
2528 outrel
.r_info
= ELF32_R_INFO (0, R_386_RELATIVE
);
2529 sreloc
= elf_section_data (input_section
)->sreloc
;
2532 loc
= sreloc
->contents
;
2533 loc
+= sreloc
->reloc_count
++ * sizeof (Elf32_External_Rel
);
2534 bfd_elf32_swap_reloc_out (output_bfd
, &outrel
, loc
);
2539 case R_386_TLS_IE_32
:
2540 case R_386_TLS_GOTIE
:
2541 r_type
= elf_i386_tls_transition (info
, r_type
, h
== NULL
);
2542 tls_type
= GOT_UNKNOWN
;
2543 if (h
== NULL
&& local_got_offsets
)
2544 tls_type
= elf_i386_local_got_tls_type (input_bfd
) [r_symndx
];
2547 tls_type
= elf_i386_hash_entry(h
)->tls_type
;
2548 if (!info
->shared
&& h
->dynindx
== -1 && (tls_type
& GOT_TLS_IE
))
2549 r_type
= R_386_TLS_LE_32
;
2551 if (tls_type
== GOT_TLS_IE
)
2552 tls_type
= GOT_TLS_IE_NEG
;
2553 if (r_type
== R_386_TLS_GD
)
2555 if (tls_type
== GOT_TLS_IE_POS
)
2556 r_type
= R_386_TLS_GOTIE
;
2557 else if (tls_type
& GOT_TLS_IE
)
2558 r_type
= R_386_TLS_IE_32
;
2561 if (r_type
== R_386_TLS_LE_32
)
2563 BFD_ASSERT (! unresolved_reloc
);
2564 if (ELF32_R_TYPE (rel
->r_info
) == R_386_TLS_GD
)
2566 unsigned int val
, type
;
2569 /* GD->LE transition. */
2570 BFD_ASSERT (rel
->r_offset
>= 2);
2571 type
= bfd_get_8 (input_bfd
, contents
+ rel
->r_offset
- 2);
2572 BFD_ASSERT (type
== 0x8d || type
== 0x04);
2573 BFD_ASSERT (rel
->r_offset
+ 9 <= input_section
->size
);
2574 BFD_ASSERT (bfd_get_8 (input_bfd
,
2575 contents
+ rel
->r_offset
+ 4)
2577 BFD_ASSERT (rel
+ 1 < relend
);
2578 BFD_ASSERT (ELF32_R_TYPE (rel
[1].r_info
) == R_386_PLT32
);
2579 roff
= rel
->r_offset
+ 5;
2580 val
= bfd_get_8 (input_bfd
,
2581 contents
+ rel
->r_offset
- 1);
2584 /* leal foo(,%reg,1), %eax; call ___tls_get_addr
2586 movl %gs:0, %eax; subl $foo@tpoff, %eax
2587 (6 byte form of subl). */
2588 BFD_ASSERT (rel
->r_offset
>= 3);
2589 BFD_ASSERT (bfd_get_8 (input_bfd
,
2590 contents
+ rel
->r_offset
- 3)
2592 BFD_ASSERT ((val
& 0xc7) == 0x05 && val
!= (4 << 3));
2593 memcpy (contents
+ rel
->r_offset
- 3,
2594 "\x65\xa1\0\0\0\0\x81\xe8\0\0\0", 12);
2598 BFD_ASSERT ((val
& 0xf8) == 0x80 && (val
& 7) != 4);
2599 if (rel
->r_offset
+ 10 <= input_section
->size
2600 && bfd_get_8 (input_bfd
,
2601 contents
+ rel
->r_offset
+ 9) == 0x90)
2603 /* leal foo(%reg), %eax; call ___tls_get_addr; nop
2605 movl %gs:0, %eax; subl $foo@tpoff, %eax
2606 (6 byte form of subl). */
2607 memcpy (contents
+ rel
->r_offset
- 2,
2608 "\x65\xa1\0\0\0\0\x81\xe8\0\0\0", 12);
2609 roff
= rel
->r_offset
+ 6;
2613 /* leal foo(%reg), %eax; call ___tls_get_addr
2615 movl %gs:0, %eax; subl $foo@tpoff, %eax
2616 (5 byte form of subl). */
2617 memcpy (contents
+ rel
->r_offset
- 2,
2618 "\x65\xa1\0\0\0\0\x2d\0\0\0", 11);
2621 bfd_put_32 (output_bfd
, tpoff (info
, relocation
),
2623 /* Skip R_386_PLT32. */
2627 else if (ELF32_R_TYPE (rel
->r_info
) == R_386_TLS_IE
)
2629 unsigned int val
, type
;
2631 /* IE->LE transition:
2632 Originally it can be one of:
2640 BFD_ASSERT (rel
->r_offset
>= 1);
2641 val
= bfd_get_8 (input_bfd
, contents
+ rel
->r_offset
- 1);
2642 BFD_ASSERT (rel
->r_offset
+ 4 <= input_section
->size
);
2645 /* movl foo, %eax. */
2646 bfd_put_8 (output_bfd
, 0xb8,
2647 contents
+ rel
->r_offset
- 1);
2651 BFD_ASSERT (rel
->r_offset
>= 2);
2652 type
= bfd_get_8 (input_bfd
,
2653 contents
+ rel
->r_offset
- 2);
2658 BFD_ASSERT ((val
& 0xc7) == 0x05);
2659 bfd_put_8 (output_bfd
, 0xc7,
2660 contents
+ rel
->r_offset
- 2);
2661 bfd_put_8 (output_bfd
,
2662 0xc0 | ((val
>> 3) & 7),
2663 contents
+ rel
->r_offset
- 1);
2667 BFD_ASSERT ((val
& 0xc7) == 0x05);
2668 bfd_put_8 (output_bfd
, 0x81,
2669 contents
+ rel
->r_offset
- 2);
2670 bfd_put_8 (output_bfd
,
2671 0xc0 | ((val
>> 3) & 7),
2672 contents
+ rel
->r_offset
- 1);
2679 bfd_put_32 (output_bfd
, -tpoff (info
, relocation
),
2680 contents
+ rel
->r_offset
);
2685 unsigned int val
, type
;
2687 /* {IE_32,GOTIE}->LE transition:
2688 Originally it can be one of:
2689 subl foo(%reg1), %reg2
2690 movl foo(%reg1), %reg2
2691 addl foo(%reg1), %reg2
2694 movl $foo, %reg2 (6 byte form)
2695 addl $foo, %reg2. */
2696 BFD_ASSERT (rel
->r_offset
>= 2);
2697 type
= bfd_get_8 (input_bfd
, contents
+ rel
->r_offset
- 2);
2698 val
= bfd_get_8 (input_bfd
, contents
+ rel
->r_offset
- 1);
2699 BFD_ASSERT (rel
->r_offset
+ 4 <= input_section
->size
);
2700 BFD_ASSERT ((val
& 0xc0) == 0x80 && (val
& 7) != 4);
2704 bfd_put_8 (output_bfd
, 0xc7,
2705 contents
+ rel
->r_offset
- 2);
2706 bfd_put_8 (output_bfd
, 0xc0 | ((val
>> 3) & 7),
2707 contents
+ rel
->r_offset
- 1);
2709 else if (type
== 0x2b)
2712 bfd_put_8 (output_bfd
, 0x81,
2713 contents
+ rel
->r_offset
- 2);
2714 bfd_put_8 (output_bfd
, 0xe8 | ((val
>> 3) & 7),
2715 contents
+ rel
->r_offset
- 1);
2717 else if (type
== 0x03)
2720 bfd_put_8 (output_bfd
, 0x81,
2721 contents
+ rel
->r_offset
- 2);
2722 bfd_put_8 (output_bfd
, 0xc0 | ((val
>> 3) & 7),
2723 contents
+ rel
->r_offset
- 1);
2727 if (ELF32_R_TYPE (rel
->r_info
) == R_386_TLS_GOTIE
)
2728 bfd_put_32 (output_bfd
, -tpoff (info
, relocation
),
2729 contents
+ rel
->r_offset
);
2731 bfd_put_32 (output_bfd
, tpoff (info
, relocation
),
2732 contents
+ rel
->r_offset
);
2737 if (htab
->sgot
== NULL
)
2741 off
= h
->got
.offset
;
2744 if (local_got_offsets
== NULL
)
2747 off
= local_got_offsets
[r_symndx
];
2754 Elf_Internal_Rela outrel
;
2758 if (htab
->srelgot
== NULL
)
2761 outrel
.r_offset
= (htab
->sgot
->output_section
->vma
2762 + htab
->sgot
->output_offset
+ off
);
2764 indx
= h
&& h
->dynindx
!= -1 ? h
->dynindx
: 0;
2765 if (r_type
== R_386_TLS_GD
)
2766 dr_type
= R_386_TLS_DTPMOD32
;
2767 else if (tls_type
== GOT_TLS_IE_POS
)
2768 dr_type
= R_386_TLS_TPOFF
;
2770 dr_type
= R_386_TLS_TPOFF32
;
2771 if (dr_type
== R_386_TLS_TPOFF
&& indx
== 0)
2772 bfd_put_32 (output_bfd
, relocation
- dtpoff_base (info
),
2773 htab
->sgot
->contents
+ off
);
2774 else if (dr_type
== R_386_TLS_TPOFF32
&& indx
== 0)
2775 bfd_put_32 (output_bfd
, dtpoff_base (info
) - relocation
,
2776 htab
->sgot
->contents
+ off
);
2778 bfd_put_32 (output_bfd
, 0,
2779 htab
->sgot
->contents
+ off
);
2780 outrel
.r_info
= ELF32_R_INFO (indx
, dr_type
);
2781 loc
= htab
->srelgot
->contents
;
2782 loc
+= htab
->srelgot
->reloc_count
++ * sizeof (Elf32_External_Rel
);
2783 bfd_elf32_swap_reloc_out (output_bfd
, &outrel
, loc
);
2785 if (r_type
== R_386_TLS_GD
)
2789 BFD_ASSERT (! unresolved_reloc
);
2790 bfd_put_32 (output_bfd
,
2791 relocation
- dtpoff_base (info
),
2792 htab
->sgot
->contents
+ off
+ 4);
2796 bfd_put_32 (output_bfd
, 0,
2797 htab
->sgot
->contents
+ off
+ 4);
2798 outrel
.r_info
= ELF32_R_INFO (indx
,
2799 R_386_TLS_DTPOFF32
);
2800 outrel
.r_offset
+= 4;
2801 htab
->srelgot
->reloc_count
++;
2802 loc
+= sizeof (Elf32_External_Rel
);
2803 bfd_elf32_swap_reloc_out (output_bfd
, &outrel
, loc
);
2806 else if (tls_type
== GOT_TLS_IE_BOTH
)
2808 bfd_put_32 (output_bfd
,
2809 indx
== 0 ? relocation
- dtpoff_base (info
) : 0,
2810 htab
->sgot
->contents
+ off
+ 4);
2811 outrel
.r_info
= ELF32_R_INFO (indx
, R_386_TLS_TPOFF
);
2812 outrel
.r_offset
+= 4;
2813 htab
->srelgot
->reloc_count
++;
2814 loc
+= sizeof (Elf32_External_Rel
);
2815 bfd_elf32_swap_reloc_out (output_bfd
, &outrel
, loc
);
2821 local_got_offsets
[r_symndx
] |= 1;
2824 if (off
>= (bfd_vma
) -2)
2826 if (r_type
== ELF32_R_TYPE (rel
->r_info
))
2828 bfd_vma g_o_t
= htab
->sgotplt
->output_section
->vma
2829 + htab
->sgotplt
->output_offset
;
2830 relocation
= htab
->sgot
->output_section
->vma
2831 + htab
->sgot
->output_offset
+ off
- g_o_t
;
2832 if ((r_type
== R_386_TLS_IE
|| r_type
== R_386_TLS_GOTIE
)
2833 && tls_type
== GOT_TLS_IE_BOTH
)
2835 if (r_type
== R_386_TLS_IE
)
2836 relocation
+= g_o_t
;
2837 unresolved_reloc
= FALSE
;
2841 unsigned int val
, type
;
2844 /* GD->IE transition. */
2845 BFD_ASSERT (rel
->r_offset
>= 2);
2846 type
= bfd_get_8 (input_bfd
, contents
+ rel
->r_offset
- 2);
2847 BFD_ASSERT (type
== 0x8d || type
== 0x04);
2848 BFD_ASSERT (rel
->r_offset
+ 9 <= input_section
->size
);
2849 BFD_ASSERT (bfd_get_8 (input_bfd
, contents
+ rel
->r_offset
+ 4)
2851 BFD_ASSERT (rel
+ 1 < relend
);
2852 BFD_ASSERT (ELF32_R_TYPE (rel
[1].r_info
) == R_386_PLT32
);
2853 roff
= rel
->r_offset
- 3;
2854 val
= bfd_get_8 (input_bfd
, contents
+ rel
->r_offset
- 1);
2857 /* leal foo(,%reg,1), %eax; call ___tls_get_addr
2859 movl %gs:0, %eax; subl $foo@gottpoff(%reg), %eax. */
2860 BFD_ASSERT (rel
->r_offset
>= 3);
2861 BFD_ASSERT (bfd_get_8 (input_bfd
,
2862 contents
+ rel
->r_offset
- 3)
2864 BFD_ASSERT ((val
& 0xc7) == 0x05 && val
!= (4 << 3));
2869 /* leal foo(%reg), %eax; call ___tls_get_addr; nop
2871 movl %gs:0, %eax; subl $foo@gottpoff(%reg), %eax. */
2872 BFD_ASSERT (rel
->r_offset
+ 10 <= input_section
->size
);
2873 BFD_ASSERT ((val
& 0xf8) == 0x80 && (val
& 7) != 4);
2874 BFD_ASSERT (bfd_get_8 (input_bfd
,
2875 contents
+ rel
->r_offset
+ 9)
2877 roff
= rel
->r_offset
- 2;
2879 memcpy (contents
+ roff
,
2880 "\x65\xa1\0\0\0\0\x2b\x80\0\0\0", 12);
2881 contents
[roff
+ 7] = 0x80 | (val
& 7);
2882 /* If foo is used only with foo@gotntpoff(%reg) and
2883 foo@indntpoff, but not with foo@gottpoff(%reg), change
2884 subl $foo@gottpoff(%reg), %eax
2886 addl $foo@gotntpoff(%reg), %eax. */
2887 if (r_type
== R_386_TLS_GOTIE
)
2889 contents
[roff
+ 6] = 0x03;
2890 if (tls_type
== GOT_TLS_IE_BOTH
)
2893 bfd_put_32 (output_bfd
,
2894 htab
->sgot
->output_section
->vma
2895 + htab
->sgot
->output_offset
+ off
2896 - htab
->sgotplt
->output_section
->vma
2897 - htab
->sgotplt
->output_offset
,
2898 contents
+ roff
+ 8);
2899 /* Skip R_386_PLT32. */
2910 /* LD->LE transition:
2912 leal foo(%reg), %eax; call ___tls_get_addr.
2914 movl %gs:0, %eax; nop; leal 0(%esi,1), %esi. */
2915 BFD_ASSERT (rel
->r_offset
>= 2);
2916 BFD_ASSERT (bfd_get_8 (input_bfd
, contents
+ rel
->r_offset
- 2)
2918 val
= bfd_get_8 (input_bfd
, contents
+ rel
->r_offset
- 1);
2919 BFD_ASSERT ((val
& 0xf8) == 0x80 && (val
& 7) != 4);
2920 BFD_ASSERT (rel
->r_offset
+ 9 <= input_section
->size
);
2921 BFD_ASSERT (bfd_get_8 (input_bfd
, contents
+ rel
->r_offset
+ 4)
2923 BFD_ASSERT (rel
+ 1 < relend
);
2924 BFD_ASSERT (ELF32_R_TYPE (rel
[1].r_info
) == R_386_PLT32
);
2925 memcpy (contents
+ rel
->r_offset
- 2,
2926 "\x65\xa1\0\0\0\0\x90\x8d\x74\x26", 11);
2927 /* Skip R_386_PLT32. */
2932 if (htab
->sgot
== NULL
)
2935 off
= htab
->tls_ldm_got
.offset
;
2940 Elf_Internal_Rela outrel
;
2943 if (htab
->srelgot
== NULL
)
2946 outrel
.r_offset
= (htab
->sgot
->output_section
->vma
2947 + htab
->sgot
->output_offset
+ off
);
2949 bfd_put_32 (output_bfd
, 0,
2950 htab
->sgot
->contents
+ off
);
2951 bfd_put_32 (output_bfd
, 0,
2952 htab
->sgot
->contents
+ off
+ 4);
2953 outrel
.r_info
= ELF32_R_INFO (0, R_386_TLS_DTPMOD32
);
2954 loc
= htab
->srelgot
->contents
;
2955 loc
+= htab
->srelgot
->reloc_count
++ * sizeof (Elf32_External_Rel
);
2956 bfd_elf32_swap_reloc_out (output_bfd
, &outrel
, loc
);
2957 htab
->tls_ldm_got
.offset
|= 1;
2959 relocation
= htab
->sgot
->output_section
->vma
2960 + htab
->sgot
->output_offset
+ off
2961 - htab
->sgotplt
->output_section
->vma
2962 - htab
->sgotplt
->output_offset
;
2963 unresolved_reloc
= FALSE
;
2966 case R_386_TLS_LDO_32
:
2967 if (info
->shared
|| (input_section
->flags
& SEC_CODE
) == 0)
2968 relocation
-= dtpoff_base (info
);
2970 /* When converting LDO to LE, we must negate. */
2971 relocation
= -tpoff (info
, relocation
);
2974 case R_386_TLS_LE_32
:
2978 Elf_Internal_Rela outrel
;
2983 outrel
.r_offset
= rel
->r_offset
2984 + input_section
->output_section
->vma
2985 + input_section
->output_offset
;
2986 if (h
!= NULL
&& h
->dynindx
!= -1)
2990 if (r_type
== R_386_TLS_LE_32
)
2991 outrel
.r_info
= ELF32_R_INFO (indx
, R_386_TLS_TPOFF32
);
2993 outrel
.r_info
= ELF32_R_INFO (indx
, R_386_TLS_TPOFF
);
2994 sreloc
= elf_section_data (input_section
)->sreloc
;
2997 loc
= sreloc
->contents
;
2998 loc
+= sreloc
->reloc_count
++ * sizeof (Elf32_External_Rel
);
2999 bfd_elf32_swap_reloc_out (output_bfd
, &outrel
, loc
);
3002 else if (r_type
== R_386_TLS_LE_32
)
3003 relocation
= dtpoff_base (info
) - relocation
;
3005 relocation
-= dtpoff_base (info
);
3007 else if (r_type
== R_386_TLS_LE_32
)
3008 relocation
= tpoff (info
, relocation
);
3010 relocation
= -tpoff (info
, relocation
);
3017 /* Dynamic relocs are not propagated for SEC_DEBUGGING sections
3018 because such sections are not SEC_ALLOC and thus ld.so will
3019 not process them. */
3020 if (unresolved_reloc
3021 && !((input_section
->flags
& SEC_DEBUGGING
) != 0
3024 (*_bfd_error_handler
)
3025 (_("%B(%A+0x%lx): unresolvable relocation against symbol `%s'"),
3028 (long) rel
->r_offset
,
3029 h
->root
.root
.string
);
3033 r
= _bfd_final_link_relocate (howto
, input_bfd
, input_section
,
3034 contents
, rel
->r_offset
,
3037 if (r
!= bfd_reloc_ok
)
3042 name
= h
->root
.root
.string
;
3045 name
= bfd_elf_string_from_elf_section (input_bfd
,
3046 symtab_hdr
->sh_link
,
3051 name
= bfd_section_name (input_bfd
, sec
);
3054 if (r
== bfd_reloc_overflow
)
3056 if (! ((*info
->callbacks
->reloc_overflow
)
3057 (info
, (h
? &h
->root
: NULL
), name
, howto
->name
,
3058 (bfd_vma
) 0, input_bfd
, input_section
,
3064 (*_bfd_error_handler
)
3065 (_("%B(%A+0x%lx): reloc against `%s': error %d"),
3066 input_bfd
, input_section
,
3067 (long) rel
->r_offset
, name
, (int) r
);
3076 /* Finish up dynamic symbol handling. We set the contents of various
3077 dynamic sections here. */
3080 elf_i386_finish_dynamic_symbol (bfd
*output_bfd
,
3081 struct bfd_link_info
*info
,
3082 struct elf_link_hash_entry
*h
,
3083 Elf_Internal_Sym
*sym
)
3085 struct elf_i386_link_hash_table
*htab
;
3087 htab
= elf_i386_hash_table (info
);
3089 if (h
->plt
.offset
!= (bfd_vma
) -1)
3093 Elf_Internal_Rela rel
;
3096 /* This symbol has an entry in the procedure linkage table. Set
3099 if (h
->dynindx
== -1
3100 || htab
->splt
== NULL
3101 || htab
->sgotplt
== NULL
3102 || htab
->srelplt
== NULL
)
3105 /* Get the index in the procedure linkage table which
3106 corresponds to this symbol. This is the index of this symbol
3107 in all the symbols for which we are making plt entries. The
3108 first entry in the procedure linkage table is reserved. */
3109 plt_index
= h
->plt
.offset
/ PLT_ENTRY_SIZE
- 1;
3111 /* Get the offset into the .got table of the entry that
3112 corresponds to this function. Each .got entry is 4 bytes.
3113 The first three are reserved. */
3114 got_offset
= (plt_index
+ 3) * 4;
3116 /* Fill in the entry in the procedure linkage table. */
3119 memcpy (htab
->splt
->contents
+ h
->plt
.offset
, elf_i386_plt_entry
,
3121 bfd_put_32 (output_bfd
,
3122 (htab
->sgotplt
->output_section
->vma
3123 + htab
->sgotplt
->output_offset
3125 htab
->splt
->contents
+ h
->plt
.offset
+ 2);
3127 if (htab
->is_vxworks
)
3129 int s
, k
, reloc_index
;
3131 /* Create the R_386_32 relocation referencing the GOT
3132 for this PLT entry. */
3134 /* S: Current slot number (zero-based). */
3135 s
= (h
->plt
.offset
- PLT_ENTRY_SIZE
) / PLT_ENTRY_SIZE
;
3136 /* K: Number of relocations for PLTResolve. */
3138 k
= PLTRESOLVE_RELOCS_SHLIB
;
3140 k
= PLTRESOLVE_RELOCS
;
3141 /* Skip the PLTresolve relocations, and the relocations for
3142 the other PLT slots. */
3143 reloc_index
= k
+ s
* PLT_NON_JUMP_SLOT_RELOCS
;
3144 loc
= (htab
->srelplt2
->contents
+ reloc_index
3145 * sizeof (Elf32_External_Rel
));
3147 rel
.r_offset
= (htab
->splt
->output_section
->vma
3148 + htab
->splt
->output_offset
3149 + h
->plt
.offset
+ 2),
3150 rel
.r_info
= ELF32_R_INFO (htab
->hgot
->indx
, R_386_32
);
3151 bfd_elf32_swap_reloc_out (output_bfd
, &rel
, loc
);
3153 /* Create the R_386_32 relocation referencing the beginning of
3154 the PLT for this GOT entry. */
3155 rel
.r_offset
= (htab
->sgotplt
->output_section
->vma
3156 + htab
->sgotplt
->output_offset
3158 rel
.r_info
= ELF32_R_INFO (htab
->hplt
->indx
, R_386_32
);
3159 bfd_elf32_swap_reloc_out (output_bfd
, &rel
,
3160 loc
+ sizeof (Elf32_External_Rel
));
3166 memcpy (htab
->splt
->contents
+ h
->plt
.offset
, elf_i386_pic_plt_entry
,
3168 bfd_put_32 (output_bfd
, got_offset
,
3169 htab
->splt
->contents
+ h
->plt
.offset
+ 2);
3172 bfd_put_32 (output_bfd
, plt_index
* sizeof (Elf32_External_Rel
),
3173 htab
->splt
->contents
+ h
->plt
.offset
+ 7);
3174 bfd_put_32 (output_bfd
, - (h
->plt
.offset
+ PLT_ENTRY_SIZE
),
3175 htab
->splt
->contents
+ h
->plt
.offset
+ 12);
3177 /* Fill in the entry in the global offset table. */
3178 bfd_put_32 (output_bfd
,
3179 (htab
->splt
->output_section
->vma
3180 + htab
->splt
->output_offset
3183 htab
->sgotplt
->contents
+ got_offset
);
3185 /* Fill in the entry in the .rel.plt section. */
3186 rel
.r_offset
= (htab
->sgotplt
->output_section
->vma
3187 + htab
->sgotplt
->output_offset
3189 rel
.r_info
= ELF32_R_INFO (h
->dynindx
, R_386_JUMP_SLOT
);
3190 loc
= htab
->srelplt
->contents
+ plt_index
* sizeof (Elf32_External_Rel
);
3191 bfd_elf32_swap_reloc_out (output_bfd
, &rel
, loc
);
3193 if (!h
->def_regular
)
3195 /* Mark the symbol as undefined, rather than as defined in
3196 the .plt section. Leave the value if there were any
3197 relocations where pointer equality matters (this is a clue
3198 for the dynamic linker, to make function pointer
3199 comparisons work between an application and shared
3200 library), otherwise set it to zero. If a function is only
3201 called from a binary, there is no need to slow down
3202 shared libraries because of that. */
3203 sym
->st_shndx
= SHN_UNDEF
;
3204 if (!h
->pointer_equality_needed
)
3209 if (h
->got
.offset
!= (bfd_vma
) -1
3210 && elf_i386_hash_entry(h
)->tls_type
!= GOT_TLS_GD
3211 && (elf_i386_hash_entry(h
)->tls_type
& GOT_TLS_IE
) == 0)
3213 Elf_Internal_Rela rel
;
3216 /* This symbol has an entry in the global offset table. Set it
3219 if (htab
->sgot
== NULL
|| htab
->srelgot
== NULL
)
3222 rel
.r_offset
= (htab
->sgot
->output_section
->vma
3223 + htab
->sgot
->output_offset
3224 + (h
->got
.offset
& ~(bfd_vma
) 1));
3226 /* If this is a static link, or it is a -Bsymbolic link and the
3227 symbol is defined locally or was forced to be local because
3228 of a version file, we just want to emit a RELATIVE reloc.
3229 The entry in the global offset table will already have been
3230 initialized in the relocate_section function. */
3232 && SYMBOL_REFERENCES_LOCAL (info
, h
))
3234 BFD_ASSERT((h
->got
.offset
& 1) != 0);
3235 rel
.r_info
= ELF32_R_INFO (0, R_386_RELATIVE
);
3239 BFD_ASSERT((h
->got
.offset
& 1) == 0);
3240 bfd_put_32 (output_bfd
, (bfd_vma
) 0,
3241 htab
->sgot
->contents
+ h
->got
.offset
);
3242 rel
.r_info
= ELF32_R_INFO (h
->dynindx
, R_386_GLOB_DAT
);
3245 loc
= htab
->srelgot
->contents
;
3246 loc
+= htab
->srelgot
->reloc_count
++ * sizeof (Elf32_External_Rel
);
3247 bfd_elf32_swap_reloc_out (output_bfd
, &rel
, loc
);
3252 Elf_Internal_Rela rel
;
3255 /* This symbol needs a copy reloc. Set it up. */
3257 if (h
->dynindx
== -1
3258 || (h
->root
.type
!= bfd_link_hash_defined
3259 && h
->root
.type
!= bfd_link_hash_defweak
)
3260 || htab
->srelbss
== NULL
)
3263 rel
.r_offset
= (h
->root
.u
.def
.value
3264 + h
->root
.u
.def
.section
->output_section
->vma
3265 + h
->root
.u
.def
.section
->output_offset
);
3266 rel
.r_info
= ELF32_R_INFO (h
->dynindx
, R_386_COPY
);
3267 loc
= htab
->srelbss
->contents
;
3268 loc
+= htab
->srelbss
->reloc_count
++ * sizeof (Elf32_External_Rel
);
3269 bfd_elf32_swap_reloc_out (output_bfd
, &rel
, loc
);
3272 /* Mark _DYNAMIC and _GLOBAL_OFFSET_TABLE_ as absolute.
3273 On VxWorks, the _GLOBAL_OFFSET_TABLE_ symbol is not absolute: it
3274 is relative to the ".got" section. */
3275 if (strcmp (h
->root
.root
.string
, "_DYNAMIC") == 0
3276 || (strcmp (h
->root
.root
.string
, "_GLOBAL_OFFSET_TABLE_") == 0
3277 && !htab
->is_vxworks
))
3278 sym
->st_shndx
= SHN_ABS
;
3283 /* Used to decide how to sort relocs in an optimal manner for the
3284 dynamic linker, before writing them out. */
3286 static enum elf_reloc_type_class
3287 elf_i386_reloc_type_class (const Elf_Internal_Rela
*rela
)
3289 switch (ELF32_R_TYPE (rela
->r_info
))
3291 case R_386_RELATIVE
:
3292 return reloc_class_relative
;
3293 case R_386_JUMP_SLOT
:
3294 return reloc_class_plt
;
3296 return reloc_class_copy
;
3298 return reloc_class_normal
;
3302 /* Finish up the dynamic sections. */
3305 elf_i386_finish_dynamic_sections (bfd
*output_bfd
,
3306 struct bfd_link_info
*info
)
3308 struct elf_i386_link_hash_table
*htab
;
3312 htab
= elf_i386_hash_table (info
);
3313 dynobj
= htab
->elf
.dynobj
;
3314 sdyn
= bfd_get_section_by_name (dynobj
, ".dynamic");
3316 if (htab
->elf
.dynamic_sections_created
)
3318 Elf32_External_Dyn
*dyncon
, *dynconend
;
3320 if (sdyn
== NULL
|| htab
->sgot
== NULL
)
3323 dyncon
= (Elf32_External_Dyn
*) sdyn
->contents
;
3324 dynconend
= (Elf32_External_Dyn
*) (sdyn
->contents
+ sdyn
->size
);
3325 for (; dyncon
< dynconend
; dyncon
++)
3327 Elf_Internal_Dyn dyn
;
3330 bfd_elf32_swap_dyn_in (dynobj
, dyncon
, &dyn
);
3339 dyn
.d_un
.d_ptr
= s
->output_section
->vma
+ s
->output_offset
;
3344 dyn
.d_un
.d_ptr
= s
->output_section
->vma
+ s
->output_offset
;
3349 dyn
.d_un
.d_val
= s
->size
;
3353 /* My reading of the SVR4 ABI indicates that the
3354 procedure linkage table relocs (DT_JMPREL) should be
3355 included in the overall relocs (DT_REL). This is
3356 what Solaris does. However, UnixWare can not handle
3357 that case. Therefore, we override the DT_RELSZ entry
3358 here to make it not include the JMPREL relocs. */
3362 dyn
.d_un
.d_val
-= s
->size
;
3366 /* We may not be using the standard ELF linker script.
3367 If .rel.plt is the first .rel section, we adjust
3368 DT_REL to not include it. */
3372 if (dyn
.d_un
.d_ptr
!= s
->output_section
->vma
+ s
->output_offset
)
3374 dyn
.d_un
.d_ptr
+= s
->size
;
3378 bfd_elf32_swap_dyn_out (output_bfd
, &dyn
, dyncon
);
3381 /* Fill in the first entry in the procedure linkage table. */
3382 if (htab
->splt
&& htab
->splt
->size
> 0)
3386 memcpy (htab
->splt
->contents
, elf_i386_pic_plt0_entry
,
3387 sizeof (elf_i386_pic_plt0_entry
));
3388 memset (htab
->splt
->contents
+ sizeof (elf_i386_pic_plt0_entry
),
3389 htab
->plt0_pad_byte
,
3390 PLT_ENTRY_SIZE
- sizeof (elf_i386_pic_plt0_entry
));
3394 memcpy (htab
->splt
->contents
, elf_i386_plt0_entry
,
3395 sizeof(elf_i386_plt0_entry
));
3396 memset (htab
->splt
->contents
+ sizeof (elf_i386_plt0_entry
),
3397 htab
->plt0_pad_byte
,
3398 PLT_ENTRY_SIZE
- sizeof (elf_i386_plt0_entry
));
3399 bfd_put_32 (output_bfd
,
3400 (htab
->sgotplt
->output_section
->vma
3401 + htab
->sgotplt
->output_offset
3403 htab
->splt
->contents
+ 2);
3404 bfd_put_32 (output_bfd
,
3405 (htab
->sgotplt
->output_section
->vma
3406 + htab
->sgotplt
->output_offset
3408 htab
->splt
->contents
+ 8);
3410 if (htab
->is_vxworks
)
3412 Elf_Internal_Rela rel
;
3413 struct elf_link_hash_entry
*hgot
;
3415 /* The VxWorks GOT is relocated by the dynamic linker.
3416 Therefore, we must emit relocations rather than
3417 simply computing the values now. */
3418 hgot
= elf_link_hash_lookup (elf_hash_table (info
),
3419 "_GLOBAL_OFFSET_TABLE_",
3420 FALSE
, FALSE
, FALSE
);
3421 /* Generate a relocation for _GLOBAL_OFFSET_TABLE_ + 4.
3422 On IA32 we use REL relocations so the addend goes in
3423 the PLT directly. */
3424 rel
.r_offset
= (htab
->splt
->output_section
->vma
3425 + htab
->splt
->output_offset
3427 rel
.r_info
= ELF32_R_INFO (hgot
->indx
, R_386_32
);
3428 bfd_elf32_swap_reloc_out (output_bfd
, &rel
,
3429 htab
->srelplt2
->contents
);
3430 /* Generate a relocation for _GLOBAL_OFFSET_TABLE_ + 8. */
3431 rel
.r_offset
= (htab
->splt
->output_section
->vma
3432 + htab
->splt
->output_offset
3434 rel
.r_info
= ELF32_R_INFO (hgot
->indx
, R_386_32
);
3435 bfd_elf32_swap_reloc_out (output_bfd
, &rel
,
3436 htab
->srelplt2
->contents
+
3437 sizeof (Elf32_External_Rel
));
3441 /* UnixWare sets the entsize of .plt to 4, although that doesn't
3442 really seem like the right value. */
3443 elf_section_data (htab
->splt
->output_section
)
3444 ->this_hdr
.sh_entsize
= 4;
3446 /* Correct the .rel.plt.unloaded relocations. */
3447 if (htab
->is_vxworks
&& !info
->shared
)
3449 int num_plts
= (htab
->splt
->size
/ PLT_ENTRY_SIZE
) - 1;
3452 p
= htab
->srelplt2
->contents
;
3454 p
+= PLTRESOLVE_RELOCS_SHLIB
* sizeof (Elf32_External_Rel
);
3456 p
+= PLTRESOLVE_RELOCS
* sizeof (Elf32_External_Rel
);
3458 for (; num_plts
; num_plts
--)
3460 Elf_Internal_Rela rel
;
3461 bfd_elf32_swap_reloc_in (output_bfd
, p
, &rel
);
3462 rel
.r_info
= ELF32_R_INFO (htab
->hgot
->indx
, R_386_32
);
3463 bfd_elf32_swap_reloc_out (output_bfd
, &rel
, p
);
3464 p
+= sizeof (Elf32_External_Rel
);
3466 bfd_elf32_swap_reloc_in (output_bfd
, p
, &rel
);
3467 rel
.r_info
= ELF32_R_INFO (htab
->hplt
->indx
, R_386_32
);
3468 bfd_elf32_swap_reloc_out (output_bfd
, &rel
, p
);
3469 p
+= sizeof (Elf32_External_Rel
);
3477 /* Fill in the first three entries in the global offset table. */
3478 if (htab
->sgotplt
->size
> 0)
3480 bfd_put_32 (output_bfd
,
3482 : sdyn
->output_section
->vma
+ sdyn
->output_offset
),
3483 htab
->sgotplt
->contents
);
3484 bfd_put_32 (output_bfd
, 0, htab
->sgotplt
->contents
+ 4);
3485 bfd_put_32 (output_bfd
, 0, htab
->sgotplt
->contents
+ 8);
3488 elf_section_data (htab
->sgotplt
->output_section
)->this_hdr
.sh_entsize
= 4;
3491 if (htab
->sgot
&& htab
->sgot
->size
> 0)
3492 elf_section_data (htab
->sgot
->output_section
)->this_hdr
.sh_entsize
= 4;
3497 /* Return address for Ith PLT stub in section PLT, for relocation REL
3498 or (bfd_vma) -1 if it should not be included. */
3501 elf_i386_plt_sym_val (bfd_vma i
, const asection
*plt
,
3502 const arelent
*rel ATTRIBUTE_UNUSED
)
3504 return plt
->vma
+ (i
+ 1) * PLT_ENTRY_SIZE
;
3508 #define TARGET_LITTLE_SYM bfd_elf32_i386_vec
3509 #define TARGET_LITTLE_NAME "elf32-i386"
3510 #define ELF_ARCH bfd_arch_i386
3511 #define ELF_MACHINE_CODE EM_386
3512 #define ELF_MAXPAGESIZE 0x1000
3514 #define elf_backend_can_gc_sections 1
3515 #define elf_backend_can_refcount 1
3516 #define elf_backend_want_got_plt 1
3517 #define elf_backend_plt_readonly 1
3518 #define elf_backend_want_plt_sym 0
3519 #define elf_backend_got_header_size 12
3521 /* Support RELA for objdump of prelink objects. */
3522 #define elf_info_to_howto elf_i386_info_to_howto_rel
3523 #define elf_info_to_howto_rel elf_i386_info_to_howto_rel
3525 #define bfd_elf32_mkobject elf_i386_mkobject
3527 #define bfd_elf32_bfd_is_local_label_name elf_i386_is_local_label_name
3528 #define bfd_elf32_bfd_link_hash_table_create elf_i386_link_hash_table_create
3529 #define bfd_elf32_bfd_reloc_type_lookup elf_i386_reloc_type_lookup
3531 #define elf_backend_adjust_dynamic_symbol elf_i386_adjust_dynamic_symbol
3532 #define elf_backend_check_relocs elf_i386_check_relocs
3533 #define elf_backend_copy_indirect_symbol elf_i386_copy_indirect_symbol
3534 #define elf_backend_create_dynamic_sections elf_i386_create_dynamic_sections
3535 #define elf_backend_fake_sections elf_i386_fake_sections
3536 #define elf_backend_finish_dynamic_sections elf_i386_finish_dynamic_sections
3537 #define elf_backend_finish_dynamic_symbol elf_i386_finish_dynamic_symbol
3538 #define elf_backend_gc_mark_hook elf_i386_gc_mark_hook
3539 #define elf_backend_gc_sweep_hook elf_i386_gc_sweep_hook
3540 #define elf_backend_grok_prstatus elf_i386_grok_prstatus
3541 #define elf_backend_grok_psinfo elf_i386_grok_psinfo
3542 #define elf_backend_reloc_type_class elf_i386_reloc_type_class
3543 #define elf_backend_relocate_section elf_i386_relocate_section
3544 #define elf_backend_size_dynamic_sections elf_i386_size_dynamic_sections
3545 #define elf_backend_plt_sym_val elf_i386_plt_sym_val
3547 #include "elf32-target.h"
3549 /* FreeBSD support. */
3551 #undef TARGET_LITTLE_SYM
3552 #define TARGET_LITTLE_SYM bfd_elf32_i386_freebsd_vec
3553 #undef TARGET_LITTLE_NAME
3554 #define TARGET_LITTLE_NAME "elf32-i386-freebsd"
3556 /* The kernel recognizes executables as valid only if they carry a
3557 "FreeBSD" label in the ELF header. So we put this label on all
3558 executables and (for simplicity) also all other object files. */
3561 elf_i386_post_process_headers (bfd
*abfd
,
3562 struct bfd_link_info
*info ATTRIBUTE_UNUSED
)
3564 Elf_Internal_Ehdr
*i_ehdrp
;
3566 i_ehdrp
= elf_elfheader (abfd
);
3568 /* Put an ABI label supported by FreeBSD >= 4.1. */
3569 i_ehdrp
->e_ident
[EI_OSABI
] = ELFOSABI_FREEBSD
;
3570 #ifdef OLD_FREEBSD_ABI_LABEL
3571 /* The ABI label supported by FreeBSD <= 4.0 is quite nonstandard. */
3572 memcpy (&i_ehdrp
->e_ident
[EI_ABIVERSION
], "FreeBSD", 8);
3576 #undef elf_backend_post_process_headers
3577 #define elf_backend_post_process_headers elf_i386_post_process_headers
3579 #define elf32_bed elf32_i386_fbsd_bed
3581 #include "elf32-target.h"
3583 /* VxWorks support. */
3585 #undef TARGET_LITTLE_SYM
3586 #define TARGET_LITTLE_SYM bfd_elf32_i386_vxworks_vec
3587 #undef TARGET_LITTLE_NAME
3588 #define TARGET_LITTLE_NAME "elf32-i386-vxworks"
3591 /* Like elf_i386_link_hash_table_create but with tweaks for VxWorks. */
3593 static struct bfd_link_hash_table
*
3594 elf_i386_vxworks_link_hash_table_create (bfd
*abfd
)
3596 struct bfd_link_hash_table
*ret
;
3597 struct elf_i386_link_hash_table
*htab
;
3599 ret
= elf_i386_link_hash_table_create (abfd
);
3602 htab
= (struct elf_i386_link_hash_table
*) ret
;
3603 htab
->is_vxworks
= 1;
3604 htab
->plt0_pad_byte
= 0x90;
3611 /* Tweak magic VxWorks symbols as they are written to the output file. */
3613 elf_i386_vxworks_link_output_symbol_hook (struct bfd_link_info
*info
3616 Elf_Internal_Sym
*sym
,
3617 asection
*input_sec ATTRIBUTE_UNUSED
,
3618 struct elf_link_hash_entry
*h
3621 /* Ignore the first dummy symbol. */
3625 return elf_vxworks_link_output_symbol_hook (name
, sym
);
3628 #undef elf_backend_post_process_headers
3629 #undef bfd_elf32_bfd_link_hash_table_create
3630 #define bfd_elf32_bfd_link_hash_table_create \
3631 elf_i386_vxworks_link_hash_table_create
3632 #undef elf_backend_add_symbol_hook
3633 #define elf_backend_add_symbol_hook \
3634 elf_vxworks_add_symbol_hook
3635 #undef elf_backend_link_output_symbol_hook
3636 #define elf_backend_link_output_symbol_hook \
3637 elf_i386_vxworks_link_output_symbol_hook
3638 #undef elf_backend_emit_relocs
3639 #define elf_backend_emit_relocs elf_vxworks_emit_relocs
3640 #undef elf_backend_final_write_processing
3641 #define elf_backend_final_write_processing \
3642 elf_vxworks_final_write_processing
3644 /* On VxWorks, we emit relocations against _PROCEDURE_LINKAGE_TABLE_, so
3646 #undef elf_backend_want_plt_sym
3647 #define elf_backend_want_plt_sym 1
3650 #define elf32_bed elf32_i386_vxworks_bed
3652 #include "elf32-target.h"