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, 2006, 2007, 2008 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 3 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,
20 MA 02110-1301, USA. */
27 #include "elf-vxworks.h"
28 #include "bfd_stdint.h"
30 /* 386 uses REL relocations instead of RELA. */
35 static reloc_howto_type elf_howto_table
[]=
37 HOWTO(R_386_NONE
, 0, 0, 0, FALSE
, 0, complain_overflow_bitfield
,
38 bfd_elf_generic_reloc
, "R_386_NONE",
39 TRUE
, 0x00000000, 0x00000000, FALSE
),
40 HOWTO(R_386_32
, 0, 2, 32, FALSE
, 0, complain_overflow_bitfield
,
41 bfd_elf_generic_reloc
, "R_386_32",
42 TRUE
, 0xffffffff, 0xffffffff, FALSE
),
43 HOWTO(R_386_PC32
, 0, 2, 32, TRUE
, 0, complain_overflow_bitfield
,
44 bfd_elf_generic_reloc
, "R_386_PC32",
45 TRUE
, 0xffffffff, 0xffffffff, TRUE
),
46 HOWTO(R_386_GOT32
, 0, 2, 32, FALSE
, 0, complain_overflow_bitfield
,
47 bfd_elf_generic_reloc
, "R_386_GOT32",
48 TRUE
, 0xffffffff, 0xffffffff, FALSE
),
49 HOWTO(R_386_PLT32
, 0, 2, 32, TRUE
, 0, complain_overflow_bitfield
,
50 bfd_elf_generic_reloc
, "R_386_PLT32",
51 TRUE
, 0xffffffff, 0xffffffff, TRUE
),
52 HOWTO(R_386_COPY
, 0, 2, 32, FALSE
, 0, complain_overflow_bitfield
,
53 bfd_elf_generic_reloc
, "R_386_COPY",
54 TRUE
, 0xffffffff, 0xffffffff, FALSE
),
55 HOWTO(R_386_GLOB_DAT
, 0, 2, 32, FALSE
, 0, complain_overflow_bitfield
,
56 bfd_elf_generic_reloc
, "R_386_GLOB_DAT",
57 TRUE
, 0xffffffff, 0xffffffff, FALSE
),
58 HOWTO(R_386_JUMP_SLOT
, 0, 2, 32, FALSE
, 0, complain_overflow_bitfield
,
59 bfd_elf_generic_reloc
, "R_386_JUMP_SLOT",
60 TRUE
, 0xffffffff, 0xffffffff, FALSE
),
61 HOWTO(R_386_RELATIVE
, 0, 2, 32, FALSE
, 0, complain_overflow_bitfield
,
62 bfd_elf_generic_reloc
, "R_386_RELATIVE",
63 TRUE
, 0xffffffff, 0xffffffff, FALSE
),
64 HOWTO(R_386_GOTOFF
, 0, 2, 32, FALSE
, 0, complain_overflow_bitfield
,
65 bfd_elf_generic_reloc
, "R_386_GOTOFF",
66 TRUE
, 0xffffffff, 0xffffffff, FALSE
),
67 HOWTO(R_386_GOTPC
, 0, 2, 32, TRUE
, 0, complain_overflow_bitfield
,
68 bfd_elf_generic_reloc
, "R_386_GOTPC",
69 TRUE
, 0xffffffff, 0xffffffff, TRUE
),
71 /* We have a gap in the reloc numbers here.
72 R_386_standard counts the number up to this point, and
73 R_386_ext_offset is the value to subtract from a reloc type of
74 R_386_16 thru R_386_PC8 to form an index into this table. */
75 #define R_386_standard (R_386_GOTPC + 1)
76 #define R_386_ext_offset (R_386_TLS_TPOFF - R_386_standard)
78 /* These relocs are a GNU extension. */
79 HOWTO(R_386_TLS_TPOFF
, 0, 2, 32, FALSE
, 0, complain_overflow_bitfield
,
80 bfd_elf_generic_reloc
, "R_386_TLS_TPOFF",
81 TRUE
, 0xffffffff, 0xffffffff, FALSE
),
82 HOWTO(R_386_TLS_IE
, 0, 2, 32, FALSE
, 0, complain_overflow_bitfield
,
83 bfd_elf_generic_reloc
, "R_386_TLS_IE",
84 TRUE
, 0xffffffff, 0xffffffff, FALSE
),
85 HOWTO(R_386_TLS_GOTIE
, 0, 2, 32, FALSE
, 0, complain_overflow_bitfield
,
86 bfd_elf_generic_reloc
, "R_386_TLS_GOTIE",
87 TRUE
, 0xffffffff, 0xffffffff, FALSE
),
88 HOWTO(R_386_TLS_LE
, 0, 2, 32, FALSE
, 0, complain_overflow_bitfield
,
89 bfd_elf_generic_reloc
, "R_386_TLS_LE",
90 TRUE
, 0xffffffff, 0xffffffff, FALSE
),
91 HOWTO(R_386_TLS_GD
, 0, 2, 32, FALSE
, 0, complain_overflow_bitfield
,
92 bfd_elf_generic_reloc
, "R_386_TLS_GD",
93 TRUE
, 0xffffffff, 0xffffffff, FALSE
),
94 HOWTO(R_386_TLS_LDM
, 0, 2, 32, FALSE
, 0, complain_overflow_bitfield
,
95 bfd_elf_generic_reloc
, "R_386_TLS_LDM",
96 TRUE
, 0xffffffff, 0xffffffff, FALSE
),
97 HOWTO(R_386_16
, 0, 1, 16, FALSE
, 0, complain_overflow_bitfield
,
98 bfd_elf_generic_reloc
, "R_386_16",
99 TRUE
, 0xffff, 0xffff, FALSE
),
100 HOWTO(R_386_PC16
, 0, 1, 16, TRUE
, 0, complain_overflow_bitfield
,
101 bfd_elf_generic_reloc
, "R_386_PC16",
102 TRUE
, 0xffff, 0xffff, TRUE
),
103 HOWTO(R_386_8
, 0, 0, 8, FALSE
, 0, complain_overflow_bitfield
,
104 bfd_elf_generic_reloc
, "R_386_8",
105 TRUE
, 0xff, 0xff, FALSE
),
106 HOWTO(R_386_PC8
, 0, 0, 8, TRUE
, 0, complain_overflow_signed
,
107 bfd_elf_generic_reloc
, "R_386_PC8",
108 TRUE
, 0xff, 0xff, TRUE
),
110 #define R_386_ext (R_386_PC8 + 1 - R_386_ext_offset)
111 #define R_386_tls_offset (R_386_TLS_LDO_32 - R_386_ext)
112 /* These are common with Solaris TLS implementation. */
113 HOWTO(R_386_TLS_LDO_32
, 0, 2, 32, FALSE
, 0, complain_overflow_bitfield
,
114 bfd_elf_generic_reloc
, "R_386_TLS_LDO_32",
115 TRUE
, 0xffffffff, 0xffffffff, FALSE
),
116 HOWTO(R_386_TLS_IE_32
, 0, 2, 32, FALSE
, 0, complain_overflow_bitfield
,
117 bfd_elf_generic_reloc
, "R_386_TLS_IE_32",
118 TRUE
, 0xffffffff, 0xffffffff, FALSE
),
119 HOWTO(R_386_TLS_LE_32
, 0, 2, 32, FALSE
, 0, complain_overflow_bitfield
,
120 bfd_elf_generic_reloc
, "R_386_TLS_LE_32",
121 TRUE
, 0xffffffff, 0xffffffff, FALSE
),
122 HOWTO(R_386_TLS_DTPMOD32
, 0, 2, 32, FALSE
, 0, complain_overflow_bitfield
,
123 bfd_elf_generic_reloc
, "R_386_TLS_DTPMOD32",
124 TRUE
, 0xffffffff, 0xffffffff, FALSE
),
125 HOWTO(R_386_TLS_DTPOFF32
, 0, 2, 32, FALSE
, 0, complain_overflow_bitfield
,
126 bfd_elf_generic_reloc
, "R_386_TLS_DTPOFF32",
127 TRUE
, 0xffffffff, 0xffffffff, FALSE
),
128 HOWTO(R_386_TLS_TPOFF32
, 0, 2, 32, FALSE
, 0, complain_overflow_bitfield
,
129 bfd_elf_generic_reloc
, "R_386_TLS_TPOFF32",
130 TRUE
, 0xffffffff, 0xffffffff, FALSE
),
132 HOWTO(R_386_TLS_GOTDESC
, 0, 2, 32, FALSE
, 0, complain_overflow_bitfield
,
133 bfd_elf_generic_reloc
, "R_386_TLS_GOTDESC",
134 TRUE
, 0xffffffff, 0xffffffff, FALSE
),
135 HOWTO(R_386_TLS_DESC_CALL
, 0, 0, 0, FALSE
, 0, complain_overflow_dont
,
136 bfd_elf_generic_reloc
, "R_386_TLS_DESC_CALL",
138 HOWTO(R_386_TLS_DESC
, 0, 2, 32, FALSE
, 0, complain_overflow_bitfield
,
139 bfd_elf_generic_reloc
, "R_386_TLS_DESC",
140 TRUE
, 0xffffffff, 0xffffffff, FALSE
),
143 #define R_386_tls (R_386_TLS_DESC + 1 - R_386_tls_offset)
144 #define R_386_vt_offset (R_386_GNU_VTINHERIT - R_386_tls)
146 /* GNU extension to record C++ vtable hierarchy. */
147 HOWTO (R_386_GNU_VTINHERIT
, /* type */
149 2, /* size (0 = byte, 1 = short, 2 = long) */
151 FALSE
, /* pc_relative */
153 complain_overflow_dont
, /* complain_on_overflow */
154 NULL
, /* special_function */
155 "R_386_GNU_VTINHERIT", /* name */
156 FALSE
, /* partial_inplace */
159 FALSE
), /* pcrel_offset */
161 /* GNU extension to record C++ vtable member usage. */
162 HOWTO (R_386_GNU_VTENTRY
, /* type */
164 2, /* size (0 = byte, 1 = short, 2 = long) */
166 FALSE
, /* pc_relative */
168 complain_overflow_dont
, /* complain_on_overflow */
169 _bfd_elf_rel_vtable_reloc_fn
, /* special_function */
170 "R_386_GNU_VTENTRY", /* name */
171 FALSE
, /* partial_inplace */
174 FALSE
) /* pcrel_offset */
176 #define R_386_vt (R_386_GNU_VTENTRY + 1 - R_386_vt_offset)
180 #ifdef DEBUG_GEN_RELOC
182 fprintf (stderr, "i386 bfd reloc lookup %d (%s)\n", code, str)
187 static reloc_howto_type
*
188 elf_i386_reloc_type_lookup (bfd
*abfd ATTRIBUTE_UNUSED
,
189 bfd_reloc_code_real_type code
)
194 TRACE ("BFD_RELOC_NONE");
195 return &elf_howto_table
[R_386_NONE
];
198 TRACE ("BFD_RELOC_32");
199 return &elf_howto_table
[R_386_32
];
202 TRACE ("BFD_RELOC_CTOR");
203 return &elf_howto_table
[R_386_32
];
205 case BFD_RELOC_32_PCREL
:
206 TRACE ("BFD_RELOC_PC32");
207 return &elf_howto_table
[R_386_PC32
];
209 case BFD_RELOC_386_GOT32
:
210 TRACE ("BFD_RELOC_386_GOT32");
211 return &elf_howto_table
[R_386_GOT32
];
213 case BFD_RELOC_386_PLT32
:
214 TRACE ("BFD_RELOC_386_PLT32");
215 return &elf_howto_table
[R_386_PLT32
];
217 case BFD_RELOC_386_COPY
:
218 TRACE ("BFD_RELOC_386_COPY");
219 return &elf_howto_table
[R_386_COPY
];
221 case BFD_RELOC_386_GLOB_DAT
:
222 TRACE ("BFD_RELOC_386_GLOB_DAT");
223 return &elf_howto_table
[R_386_GLOB_DAT
];
225 case BFD_RELOC_386_JUMP_SLOT
:
226 TRACE ("BFD_RELOC_386_JUMP_SLOT");
227 return &elf_howto_table
[R_386_JUMP_SLOT
];
229 case BFD_RELOC_386_RELATIVE
:
230 TRACE ("BFD_RELOC_386_RELATIVE");
231 return &elf_howto_table
[R_386_RELATIVE
];
233 case BFD_RELOC_386_GOTOFF
:
234 TRACE ("BFD_RELOC_386_GOTOFF");
235 return &elf_howto_table
[R_386_GOTOFF
];
237 case BFD_RELOC_386_GOTPC
:
238 TRACE ("BFD_RELOC_386_GOTPC");
239 return &elf_howto_table
[R_386_GOTPC
];
241 /* These relocs are a GNU extension. */
242 case BFD_RELOC_386_TLS_TPOFF
:
243 TRACE ("BFD_RELOC_386_TLS_TPOFF");
244 return &elf_howto_table
[R_386_TLS_TPOFF
- R_386_ext_offset
];
246 case BFD_RELOC_386_TLS_IE
:
247 TRACE ("BFD_RELOC_386_TLS_IE");
248 return &elf_howto_table
[R_386_TLS_IE
- R_386_ext_offset
];
250 case BFD_RELOC_386_TLS_GOTIE
:
251 TRACE ("BFD_RELOC_386_TLS_GOTIE");
252 return &elf_howto_table
[R_386_TLS_GOTIE
- R_386_ext_offset
];
254 case BFD_RELOC_386_TLS_LE
:
255 TRACE ("BFD_RELOC_386_TLS_LE");
256 return &elf_howto_table
[R_386_TLS_LE
- R_386_ext_offset
];
258 case BFD_RELOC_386_TLS_GD
:
259 TRACE ("BFD_RELOC_386_TLS_GD");
260 return &elf_howto_table
[R_386_TLS_GD
- R_386_ext_offset
];
262 case BFD_RELOC_386_TLS_LDM
:
263 TRACE ("BFD_RELOC_386_TLS_LDM");
264 return &elf_howto_table
[R_386_TLS_LDM
- R_386_ext_offset
];
267 TRACE ("BFD_RELOC_16");
268 return &elf_howto_table
[R_386_16
- R_386_ext_offset
];
270 case BFD_RELOC_16_PCREL
:
271 TRACE ("BFD_RELOC_16_PCREL");
272 return &elf_howto_table
[R_386_PC16
- R_386_ext_offset
];
275 TRACE ("BFD_RELOC_8");
276 return &elf_howto_table
[R_386_8
- R_386_ext_offset
];
278 case BFD_RELOC_8_PCREL
:
279 TRACE ("BFD_RELOC_8_PCREL");
280 return &elf_howto_table
[R_386_PC8
- R_386_ext_offset
];
282 /* Common with Sun TLS implementation. */
283 case BFD_RELOC_386_TLS_LDO_32
:
284 TRACE ("BFD_RELOC_386_TLS_LDO_32");
285 return &elf_howto_table
[R_386_TLS_LDO_32
- R_386_tls_offset
];
287 case BFD_RELOC_386_TLS_IE_32
:
288 TRACE ("BFD_RELOC_386_TLS_IE_32");
289 return &elf_howto_table
[R_386_TLS_IE_32
- R_386_tls_offset
];
291 case BFD_RELOC_386_TLS_LE_32
:
292 TRACE ("BFD_RELOC_386_TLS_LE_32");
293 return &elf_howto_table
[R_386_TLS_LE_32
- R_386_tls_offset
];
295 case BFD_RELOC_386_TLS_DTPMOD32
:
296 TRACE ("BFD_RELOC_386_TLS_DTPMOD32");
297 return &elf_howto_table
[R_386_TLS_DTPMOD32
- R_386_tls_offset
];
299 case BFD_RELOC_386_TLS_DTPOFF32
:
300 TRACE ("BFD_RELOC_386_TLS_DTPOFF32");
301 return &elf_howto_table
[R_386_TLS_DTPOFF32
- R_386_tls_offset
];
303 case BFD_RELOC_386_TLS_TPOFF32
:
304 TRACE ("BFD_RELOC_386_TLS_TPOFF32");
305 return &elf_howto_table
[R_386_TLS_TPOFF32
- R_386_tls_offset
];
307 case BFD_RELOC_386_TLS_GOTDESC
:
308 TRACE ("BFD_RELOC_386_TLS_GOTDESC");
309 return &elf_howto_table
[R_386_TLS_GOTDESC
- R_386_tls_offset
];
311 case BFD_RELOC_386_TLS_DESC_CALL
:
312 TRACE ("BFD_RELOC_386_TLS_DESC_CALL");
313 return &elf_howto_table
[R_386_TLS_DESC_CALL
- R_386_tls_offset
];
315 case BFD_RELOC_386_TLS_DESC
:
316 TRACE ("BFD_RELOC_386_TLS_DESC");
317 return &elf_howto_table
[R_386_TLS_DESC
- R_386_tls_offset
];
319 case BFD_RELOC_VTABLE_INHERIT
:
320 TRACE ("BFD_RELOC_VTABLE_INHERIT");
321 return &elf_howto_table
[R_386_GNU_VTINHERIT
- R_386_vt_offset
];
323 case BFD_RELOC_VTABLE_ENTRY
:
324 TRACE ("BFD_RELOC_VTABLE_ENTRY");
325 return &elf_howto_table
[R_386_GNU_VTENTRY
- R_386_vt_offset
];
335 static reloc_howto_type
*
336 elf_i386_reloc_name_lookup (bfd
*abfd ATTRIBUTE_UNUSED
,
341 for (i
= 0; i
< sizeof (elf_howto_table
) / sizeof (elf_howto_table
[0]); i
++)
342 if (elf_howto_table
[i
].name
!= NULL
343 && strcasecmp (elf_howto_table
[i
].name
, r_name
) == 0)
344 return &elf_howto_table
[i
];
349 static reloc_howto_type
*
350 elf_i386_rtype_to_howto (bfd
*abfd
, unsigned r_type
)
354 if ((indx
= r_type
) >= R_386_standard
355 && ((indx
= r_type
- R_386_ext_offset
) - R_386_standard
356 >= R_386_ext
- R_386_standard
)
357 && ((indx
= r_type
- R_386_tls_offset
) - R_386_ext
358 >= R_386_tls
- R_386_ext
)
359 && ((indx
= r_type
- R_386_vt_offset
) - R_386_tls
360 >= R_386_vt
- R_386_tls
))
362 (*_bfd_error_handler
) (_("%B: invalid relocation type %d"),
366 BFD_ASSERT (elf_howto_table
[indx
].type
== r_type
);
367 return &elf_howto_table
[indx
];
371 elf_i386_info_to_howto_rel (bfd
*abfd ATTRIBUTE_UNUSED
,
373 Elf_Internal_Rela
*dst
)
375 unsigned int r_type
= ELF32_R_TYPE (dst
->r_info
);
376 cache_ptr
->howto
= elf_i386_rtype_to_howto (abfd
, r_type
);
379 /* Return whether a symbol name implies a local label. The UnixWare
380 2.1 cc generates temporary symbols that start with .X, so we
381 recognize them here. FIXME: do other SVR4 compilers also use .X?.
382 If so, we should move the .X recognition into
383 _bfd_elf_is_local_label_name. */
386 elf_i386_is_local_label_name (bfd
*abfd
, const char *name
)
388 if (name
[0] == '.' && name
[1] == 'X')
391 return _bfd_elf_is_local_label_name (abfd
, name
);
394 /* Support for core dump NOTE sections. */
397 elf_i386_grok_prstatus (bfd
*abfd
, Elf_Internal_Note
*note
)
402 if (note
->namesz
== 8 && strcmp (note
->namedata
, "FreeBSD") == 0)
404 int pr_version
= bfd_get_32 (abfd
, note
->descdata
);
410 elf_tdata (abfd
)->core_signal
= bfd_get_32 (abfd
, note
->descdata
+ 20);
413 elf_tdata (abfd
)->core_pid
= bfd_get_32 (abfd
, note
->descdata
+ 24);
417 size
= bfd_get_32 (abfd
, note
->descdata
+ 8);
421 switch (note
->descsz
)
426 case 144: /* Linux/i386 */
428 elf_tdata (abfd
)->core_signal
= bfd_get_16 (abfd
, note
->descdata
+ 12);
431 elf_tdata (abfd
)->core_pid
= bfd_get_32 (abfd
, note
->descdata
+ 24);
441 /* Make a ".reg/999" section. */
442 return _bfd_elfcore_make_pseudosection (abfd
, ".reg",
443 size
, note
->descpos
+ offset
);
447 elf_i386_grok_psinfo (bfd
*abfd
, Elf_Internal_Note
*note
)
449 if (note
->namesz
== 8 && strcmp (note
->namedata
, "FreeBSD") == 0)
451 int pr_version
= bfd_get_32 (abfd
, note
->descdata
);
456 elf_tdata (abfd
)->core_program
457 = _bfd_elfcore_strndup (abfd
, note
->descdata
+ 8, 17);
458 elf_tdata (abfd
)->core_command
459 = _bfd_elfcore_strndup (abfd
, note
->descdata
+ 25, 81);
463 switch (note
->descsz
)
468 case 124: /* Linux/i386 elf_prpsinfo. */
469 elf_tdata (abfd
)->core_program
470 = _bfd_elfcore_strndup (abfd
, note
->descdata
+ 28, 16);
471 elf_tdata (abfd
)->core_command
472 = _bfd_elfcore_strndup (abfd
, note
->descdata
+ 44, 80);
476 /* Note that for some reason, a spurious space is tacked
477 onto the end of the args in some (at least one anyway)
478 implementations, so strip it off if it exists. */
480 char *command
= elf_tdata (abfd
)->core_command
;
481 int n
= strlen (command
);
483 if (0 < n
&& command
[n
- 1] == ' ')
484 command
[n
- 1] = '\0';
490 /* Functions for the i386 ELF linker.
492 In order to gain some understanding of code in this file without
493 knowing all the intricate details of the linker, note the
496 Functions named elf_i386_* are called by external routines, other
497 functions are only called locally. elf_i386_* functions appear
498 in this file more or less in the order in which they are called
499 from external routines. eg. elf_i386_check_relocs is called
500 early in the link process, elf_i386_finish_dynamic_sections is
501 one of the last functions. */
504 /* The name of the dynamic interpreter. This is put in the .interp
507 #define ELF_DYNAMIC_INTERPRETER "/usr/lib/libc.so.1"
509 /* If ELIMINATE_COPY_RELOCS is non-zero, the linker will try to avoid
510 copying dynamic variables from a shared lib into an app's dynbss
511 section, and instead use a dynamic relocation to point into the
513 #define ELIMINATE_COPY_RELOCS 1
515 /* The size in bytes of an entry in the procedure linkage table. */
517 #define PLT_ENTRY_SIZE 16
519 /* The first entry in an absolute procedure linkage table looks like
520 this. See the SVR4 ABI i386 supplement to see how this works.
521 Will be padded to PLT_ENTRY_SIZE with htab->plt0_pad_byte. */
523 static const bfd_byte elf_i386_plt0_entry
[12] =
525 0xff, 0x35, /* pushl contents of address */
526 0, 0, 0, 0, /* replaced with address of .got + 4. */
527 0xff, 0x25, /* jmp indirect */
528 0, 0, 0, 0 /* replaced with address of .got + 8. */
531 /* Subsequent entries in an absolute procedure linkage table look like
534 static const bfd_byte elf_i386_plt_entry
[PLT_ENTRY_SIZE
] =
536 0xff, 0x25, /* jmp indirect */
537 0, 0, 0, 0, /* replaced with address of this symbol in .got. */
538 0x68, /* pushl immediate */
539 0, 0, 0, 0, /* replaced with offset into relocation table. */
540 0xe9, /* jmp relative */
541 0, 0, 0, 0 /* replaced with offset to start of .plt. */
544 /* The first entry in a PIC procedure linkage table look like this.
545 Will be padded to PLT_ENTRY_SIZE with htab->plt0_pad_byte. */
547 static const bfd_byte elf_i386_pic_plt0_entry
[12] =
549 0xff, 0xb3, 4, 0, 0, 0, /* pushl 4(%ebx) */
550 0xff, 0xa3, 8, 0, 0, 0 /* jmp *8(%ebx) */
553 /* Subsequent entries in a PIC procedure linkage table look like this. */
555 static const bfd_byte elf_i386_pic_plt_entry
[PLT_ENTRY_SIZE
] =
557 0xff, 0xa3, /* jmp *offset(%ebx) */
558 0, 0, 0, 0, /* replaced with offset of this symbol in .got. */
559 0x68, /* pushl immediate */
560 0, 0, 0, 0, /* replaced with offset into relocation table. */
561 0xe9, /* jmp relative */
562 0, 0, 0, 0 /* replaced with offset to start of .plt. */
565 /* On VxWorks, the .rel.plt.unloaded section has absolute relocations
566 for the PLTResolve stub and then for each PLT entry. */
567 #define PLTRESOLVE_RELOCS_SHLIB 0
568 #define PLTRESOLVE_RELOCS 2
569 #define PLT_NON_JUMP_SLOT_RELOCS 2
571 /* The i386 linker needs to keep track of the number of relocs that it
572 decides to copy as dynamic relocs in check_relocs for each symbol.
573 This is so that it can later discard them if they are found to be
574 unnecessary. We store the information in a field extending the
575 regular ELF linker hash table. */
577 struct elf_i386_dyn_relocs
579 struct elf_i386_dyn_relocs
*next
;
581 /* The input section of the reloc. */
584 /* Total number of relocs copied for the input section. */
587 /* Number of pc-relative relocs copied for the input section. */
588 bfd_size_type pc_count
;
591 /* i386 ELF linker hash entry. */
593 struct elf_i386_link_hash_entry
595 struct elf_link_hash_entry elf
;
597 /* Track dynamic relocs copied for this symbol. */
598 struct elf_i386_dyn_relocs
*dyn_relocs
;
600 #define GOT_UNKNOWN 0
604 #define GOT_TLS_IE_POS 5
605 #define GOT_TLS_IE_NEG 6
606 #define GOT_TLS_IE_BOTH 7
607 #define GOT_TLS_GDESC 8
608 #define GOT_TLS_GD_BOTH_P(type) \
609 ((type) == (GOT_TLS_GD | GOT_TLS_GDESC))
610 #define GOT_TLS_GD_P(type) \
611 ((type) == GOT_TLS_GD || GOT_TLS_GD_BOTH_P (type))
612 #define GOT_TLS_GDESC_P(type) \
613 ((type) == GOT_TLS_GDESC || GOT_TLS_GD_BOTH_P (type))
614 #define GOT_TLS_GD_ANY_P(type) \
615 (GOT_TLS_GD_P (type) || GOT_TLS_GDESC_P (type))
616 unsigned char tls_type
;
618 /* Offset of the GOTPLT entry reserved for the TLS descriptor,
619 starting at the end of the jump table. */
623 #define elf_i386_hash_entry(ent) ((struct elf_i386_link_hash_entry *)(ent))
625 struct elf_i386_obj_tdata
627 struct elf_obj_tdata root
;
629 /* tls_type for each local got entry. */
630 char *local_got_tls_type
;
632 /* GOTPLT entries for TLS descriptors. */
633 bfd_vma
*local_tlsdesc_gotent
;
636 #define elf_i386_tdata(abfd) \
637 ((struct elf_i386_obj_tdata *) (abfd)->tdata.any)
639 #define elf_i386_local_got_tls_type(abfd) \
640 (elf_i386_tdata (abfd)->local_got_tls_type)
642 #define elf_i386_local_tlsdesc_gotent(abfd) \
643 (elf_i386_tdata (abfd)->local_tlsdesc_gotent)
645 #define is_i386_elf(bfd) \
646 (bfd_get_flavour (bfd) == bfd_target_elf_flavour \
647 && elf_tdata (bfd) != NULL \
648 && elf_object_id (bfd) == I386_ELF_TDATA)
651 elf_i386_mkobject (bfd
*abfd
)
653 return bfd_elf_allocate_object (abfd
, sizeof (struct elf_i386_obj_tdata
),
657 /* i386 ELF linker hash table. */
659 struct elf_i386_link_hash_table
661 struct elf_link_hash_table elf
;
663 /* Short-cuts to get to dynamic linker sections. */
672 /* The (unloaded but important) .rel.plt.unloaded section on VxWorks. */
675 /* True if the target system is VxWorks. */
678 /* Value used to fill the last word of the first plt entry. */
679 bfd_byte plt0_pad_byte
;
681 /* The index of the next unused R_386_TLS_DESC slot in .rel.plt. */
682 bfd_vma next_tls_desc_index
;
685 bfd_signed_vma refcount
;
689 /* The amount of space used by the reserved portion of the sgotplt
690 section, plus whatever space is used by the jump slots. */
691 bfd_vma sgotplt_jump_table_size
;
693 /* Small local sym to section mapping cache. */
694 struct sym_sec_cache sym_sec
;
696 /* _TLS_MODULE_BASE_ symbol. */
697 struct bfd_link_hash_entry
*tls_module_base
;
700 /* Get the i386 ELF linker hash table from a link_info structure. */
702 #define elf_i386_hash_table(p) \
703 ((struct elf_i386_link_hash_table *) ((p)->hash))
705 #define elf_i386_compute_jump_table_size(htab) \
706 ((htab)->next_tls_desc_index * 4)
708 /* Create an entry in an i386 ELF linker hash table. */
710 static struct bfd_hash_entry
*
711 elf_i386_link_hash_newfunc (struct bfd_hash_entry
*entry
,
712 struct bfd_hash_table
*table
,
715 /* Allocate the structure if it has not already been allocated by a
719 entry
= bfd_hash_allocate (table
,
720 sizeof (struct elf_i386_link_hash_entry
));
725 /* Call the allocation method of the superclass. */
726 entry
= _bfd_elf_link_hash_newfunc (entry
, table
, string
);
729 struct elf_i386_link_hash_entry
*eh
;
731 eh
= (struct elf_i386_link_hash_entry
*) entry
;
732 eh
->dyn_relocs
= NULL
;
733 eh
->tls_type
= GOT_UNKNOWN
;
734 eh
->tlsdesc_got
= (bfd_vma
) -1;
740 /* Create an i386 ELF linker hash table. */
742 static struct bfd_link_hash_table
*
743 elf_i386_link_hash_table_create (bfd
*abfd
)
745 struct elf_i386_link_hash_table
*ret
;
746 bfd_size_type amt
= sizeof (struct elf_i386_link_hash_table
);
748 ret
= bfd_malloc (amt
);
752 if (!_bfd_elf_link_hash_table_init (&ret
->elf
, abfd
,
753 elf_i386_link_hash_newfunc
,
754 sizeof (struct elf_i386_link_hash_entry
)))
767 ret
->tls_ldm_got
.refcount
= 0;
768 ret
->next_tls_desc_index
= 0;
769 ret
->sgotplt_jump_table_size
= 0;
770 ret
->sym_sec
.abfd
= NULL
;
772 ret
->srelplt2
= NULL
;
773 ret
->plt0_pad_byte
= 0;
774 ret
->tls_module_base
= NULL
;
776 return &ret
->elf
.root
;
779 /* Create .got, .gotplt, and .rel.got sections in DYNOBJ, and set up
780 shortcuts to them in our hash table. */
783 elf_i386_create_got_section (bfd
*dynobj
, struct bfd_link_info
*info
)
785 struct elf_i386_link_hash_table
*htab
;
787 if (! _bfd_elf_create_got_section (dynobj
, info
))
790 htab
= elf_i386_hash_table (info
);
791 htab
->sgot
= bfd_get_section_by_name (dynobj
, ".got");
792 htab
->sgotplt
= bfd_get_section_by_name (dynobj
, ".got.plt");
793 if (!htab
->sgot
|| !htab
->sgotplt
)
796 htab
->srelgot
= bfd_make_section_with_flags (dynobj
, ".rel.got",
797 (SEC_ALLOC
| SEC_LOAD
802 if (htab
->srelgot
== NULL
803 || ! bfd_set_section_alignment (dynobj
, htab
->srelgot
, 2))
808 /* Create .plt, .rel.plt, .got, .got.plt, .rel.got, .dynbss, and
809 .rel.bss sections in DYNOBJ, and set up shortcuts to them in our
813 elf_i386_create_dynamic_sections (bfd
*dynobj
, struct bfd_link_info
*info
)
815 struct elf_i386_link_hash_table
*htab
;
817 htab
= elf_i386_hash_table (info
);
818 if (!htab
->sgot
&& !elf_i386_create_got_section (dynobj
, info
))
821 if (!_bfd_elf_create_dynamic_sections (dynobj
, info
))
824 htab
->splt
= bfd_get_section_by_name (dynobj
, ".plt");
825 htab
->srelplt
= bfd_get_section_by_name (dynobj
, ".rel.plt");
826 htab
->sdynbss
= bfd_get_section_by_name (dynobj
, ".dynbss");
828 htab
->srelbss
= bfd_get_section_by_name (dynobj
, ".rel.bss");
830 if (!htab
->splt
|| !htab
->srelplt
|| !htab
->sdynbss
831 || (!info
->shared
&& !htab
->srelbss
))
835 && !elf_vxworks_create_dynamic_sections (dynobj
, info
, &htab
->srelplt2
))
841 /* Copy the extra info we tack onto an elf_link_hash_entry. */
844 elf_i386_copy_indirect_symbol (struct bfd_link_info
*info
,
845 struct elf_link_hash_entry
*dir
,
846 struct elf_link_hash_entry
*ind
)
848 struct elf_i386_link_hash_entry
*edir
, *eind
;
850 edir
= (struct elf_i386_link_hash_entry
*) dir
;
851 eind
= (struct elf_i386_link_hash_entry
*) ind
;
853 if (eind
->dyn_relocs
!= NULL
)
855 if (edir
->dyn_relocs
!= NULL
)
857 struct elf_i386_dyn_relocs
**pp
;
858 struct elf_i386_dyn_relocs
*p
;
860 /* Add reloc counts against the indirect sym to the direct sym
861 list. Merge any entries against the same section. */
862 for (pp
= &eind
->dyn_relocs
; (p
= *pp
) != NULL
; )
864 struct elf_i386_dyn_relocs
*q
;
866 for (q
= edir
->dyn_relocs
; q
!= NULL
; q
= q
->next
)
867 if (q
->sec
== p
->sec
)
869 q
->pc_count
+= p
->pc_count
;
870 q
->count
+= p
->count
;
877 *pp
= edir
->dyn_relocs
;
880 edir
->dyn_relocs
= eind
->dyn_relocs
;
881 eind
->dyn_relocs
= NULL
;
884 if (ind
->root
.type
== bfd_link_hash_indirect
885 && dir
->got
.refcount
<= 0)
887 edir
->tls_type
= eind
->tls_type
;
888 eind
->tls_type
= GOT_UNKNOWN
;
891 if (ELIMINATE_COPY_RELOCS
892 && ind
->root
.type
!= bfd_link_hash_indirect
893 && dir
->dynamic_adjusted
)
895 /* If called to transfer flags for a weakdef during processing
896 of elf_adjust_dynamic_symbol, don't copy non_got_ref.
897 We clear it ourselves for ELIMINATE_COPY_RELOCS. */
898 dir
->ref_dynamic
|= ind
->ref_dynamic
;
899 dir
->ref_regular
|= ind
->ref_regular
;
900 dir
->ref_regular_nonweak
|= ind
->ref_regular_nonweak
;
901 dir
->needs_plt
|= ind
->needs_plt
;
902 dir
->pointer_equality_needed
|= ind
->pointer_equality_needed
;
905 _bfd_elf_link_hash_copy_indirect (info
, dir
, ind
);
915 /* Return TRUE if the TLS access code sequence support transition
919 elf_i386_check_tls_transition (bfd
*abfd
, asection
*sec
,
921 Elf_Internal_Shdr
*symtab_hdr
,
922 struct elf_link_hash_entry
**sym_hashes
,
924 const Elf_Internal_Rela
*rel
,
925 const Elf_Internal_Rela
*relend
)
927 unsigned int val
, type
;
928 unsigned long r_symndx
;
929 struct elf_link_hash_entry
*h
;
932 /* Get the section contents. */
933 if (contents
== NULL
)
935 if (elf_section_data (sec
)->this_hdr
.contents
!= NULL
)
936 contents
= elf_section_data (sec
)->this_hdr
.contents
;
939 /* FIXME: How to better handle error condition? */
940 if (!bfd_malloc_and_get_section (abfd
, sec
, &contents
))
943 /* Cache the section contents for elf_link_input_bfd. */
944 elf_section_data (sec
)->this_hdr
.contents
= contents
;
948 offset
= rel
->r_offset
;
953 if (offset
< 2 || (rel
+ 1) >= relend
)
956 type
= bfd_get_8 (abfd
, contents
+ offset
- 2);
957 if (r_type
== R_386_TLS_GD
)
959 /* Check transition from GD access model. Only
960 leal foo@tlsgd(,%reg,1), %eax; call ___tls_get_addr
961 leal foo@tlsgd(%reg), %eax; call ___tls_get_addr; nop
962 can transit to different access model. */
963 if ((offset
+ 10) > sec
->size
||
964 (type
!= 0x8d && type
!= 0x04))
967 val
= bfd_get_8 (abfd
, contents
+ offset
- 1);
970 /* leal foo@tlsgd(,%reg,1), %eax; call ___tls_get_addr */
974 if (bfd_get_8 (abfd
, contents
+ offset
- 3) != 0x8d)
977 if ((val
& 0xc7) != 0x05 || val
== (4 << 3))
982 /* leal foo@tlsgd(%reg), %eax; call ___tls_get_addr; nop */
983 if ((val
& 0xf8) != 0x80 || (val
& 7) == 4)
986 if (bfd_get_8 (abfd
, contents
+ offset
+ 9) != 0x90)
992 /* Check transition from LD access model. Only
993 leal foo@tlsgd(%reg), %eax; call ___tls_get_addr
994 can transit to different access model. */
995 if (type
!= 0x8d || (offset
+ 9) > sec
->size
)
998 val
= bfd_get_8 (abfd
, contents
+ offset
- 1);
999 if ((val
& 0xf8) != 0x80 || (val
& 7) == 4)
1003 if (bfd_get_8 (abfd
, contents
+ offset
+ 4) != 0xe8)
1006 r_symndx
= ELF32_R_SYM (rel
[1].r_info
);
1007 if (r_symndx
< symtab_hdr
->sh_info
)
1010 h
= sym_hashes
[r_symndx
- symtab_hdr
->sh_info
];
1011 /* Use strncmp to check ___tls_get_addr since ___tls_get_addr
1012 may be versioned. */
1014 && h
->root
.root
.string
!= NULL
1015 && (ELF32_R_TYPE (rel
[1].r_info
) == R_386_PC32
1016 || ELF32_R_TYPE (rel
[1].r_info
) == R_386_PLT32
)
1017 && (strncmp (h
->root
.root
.string
, "___tls_get_addr",
1021 /* Check transition from IE access model:
1022 movl foo@indntpoff(%rip), %eax
1023 movl foo@indntpoff(%rip), %reg
1024 addl foo@indntpoff(%rip), %reg
1027 if (offset
< 1 || (offset
+ 4) > sec
->size
)
1030 /* Check "movl foo@tpoff(%rip), %eax" first. */
1031 val
= bfd_get_8 (abfd
, contents
+ offset
- 1);
1038 /* Check movl|addl foo@tpoff(%rip), %reg. */
1039 type
= bfd_get_8 (abfd
, contents
+ offset
- 2);
1040 return ((type
== 0x8b || type
== 0x03)
1041 && (val
& 0xc7) == 0x05);
1043 case R_386_TLS_GOTIE
:
1044 case R_386_TLS_IE_32
:
1045 /* Check transition from {IE_32,GOTIE} access model:
1046 subl foo@{tpoff,gontoff}(%reg1), %reg2
1047 movl foo@{tpoff,gontoff}(%reg1), %reg2
1048 addl foo@{tpoff,gontoff}(%reg1), %reg2
1051 if (offset
< 2 || (offset
+ 4) > sec
->size
)
1054 val
= bfd_get_8 (abfd
, contents
+ offset
- 1);
1055 if ((val
& 0xc0) != 0x80 || (val
& 7) == 4)
1058 type
= bfd_get_8 (abfd
, contents
+ offset
- 2);
1059 return type
== 0x8b || type
== 0x2b || type
== 0x03;
1061 case R_386_TLS_GOTDESC
:
1062 /* Check transition from GDesc access model:
1063 leal x@tlsdesc(%ebx), %eax
1065 Make sure it's a leal adding ebx to a 32-bit offset
1066 into any register, although it's probably almost always
1069 if (offset
< 2 || (offset
+ 4) > sec
->size
)
1072 if (bfd_get_8 (abfd
, contents
+ offset
- 2) != 0x8d)
1075 val
= bfd_get_8 (abfd
, contents
+ offset
- 1);
1076 return (val
& 0xc7) == 0x83;
1078 case R_386_TLS_DESC_CALL
:
1079 /* Check transition from GDesc access model:
1080 call *x@tlsdesc(%rax)
1082 if (offset
+ 2 <= sec
->size
)
1084 /* Make sure that it's a call *x@tlsdesc(%rax). */
1085 static i386_opcode16 call
= { { 0xff, 0x10 } };
1086 return bfd_get_16 (abfd
, contents
+ offset
) == call
.i
;
1096 /* Return TRUE if the TLS access transition is OK or no transition
1097 will be performed. Update R_TYPE if there is a transition. */
1100 elf_i386_tls_transition (struct bfd_link_info
*info
, bfd
*abfd
,
1101 asection
*sec
, bfd_byte
*contents
,
1102 Elf_Internal_Shdr
*symtab_hdr
,
1103 struct elf_link_hash_entry
**sym_hashes
,
1104 unsigned int *r_type
, int tls_type
,
1105 const Elf_Internal_Rela
*rel
,
1106 const Elf_Internal_Rela
*relend
,
1107 struct elf_link_hash_entry
*h
)
1109 unsigned int from_type
= *r_type
;
1110 unsigned int to_type
= from_type
;
1111 bfd_boolean check
= TRUE
;
1116 case R_386_TLS_GOTDESC
:
1117 case R_386_TLS_DESC_CALL
:
1118 case R_386_TLS_IE_32
:
1120 case R_386_TLS_GOTIE
:
1124 to_type
= R_386_TLS_LE_32
;
1125 else if (from_type
!= R_386_TLS_IE
1126 && from_type
!= R_386_TLS_GOTIE
)
1127 to_type
= R_386_TLS_IE_32
;
1130 /* When we are called from elf_i386_relocate_section, CONTENTS
1131 isn't NULL and there may be additional transitions based on
1133 if (contents
!= NULL
)
1135 unsigned int new_to_type
= to_type
;
1140 && (tls_type
& GOT_TLS_IE
))
1141 new_to_type
= R_386_TLS_LE_32
;
1143 if (to_type
== R_386_TLS_GD
1144 || to_type
== R_386_TLS_GOTDESC
1145 || to_type
== R_386_TLS_DESC_CALL
)
1147 if (tls_type
== GOT_TLS_IE_POS
)
1148 new_to_type
= R_386_TLS_GOTIE
;
1149 else if (tls_type
& GOT_TLS_IE
)
1150 new_to_type
= R_386_TLS_IE_32
;
1153 /* We checked the transition before when we were called from
1154 elf_i386_check_relocs. We only want to check the new
1155 transition which hasn't been checked before. */
1156 check
= new_to_type
!= to_type
&& from_type
== to_type
;
1157 to_type
= new_to_type
;
1164 to_type
= R_386_TLS_LE_32
;
1171 /* Return TRUE if there is no transition. */
1172 if (from_type
== to_type
)
1175 /* Check if the transition can be performed. */
1177 && ! elf_i386_check_tls_transition (abfd
, sec
, contents
,
1178 symtab_hdr
, sym_hashes
,
1179 from_type
, rel
, relend
))
1181 reloc_howto_type
*from
, *to
;
1183 from
= elf_i386_rtype_to_howto (abfd
, from_type
);
1184 to
= elf_i386_rtype_to_howto (abfd
, to_type
);
1186 (*_bfd_error_handler
)
1187 (_("%B: TLS transition from %s to %s against `%s' at 0x%lx "
1188 "in section `%A' failed"),
1189 abfd
, sec
, from
->name
, to
->name
,
1190 h
? h
->root
.root
.string
: "a local symbol",
1191 (unsigned long) rel
->r_offset
);
1192 bfd_set_error (bfd_error_bad_value
);
1200 /* Look through the relocs for a section during the first phase, and
1201 calculate needed space in the global offset table, procedure linkage
1202 table, and dynamic reloc sections. */
1205 elf_i386_check_relocs (bfd
*abfd
,
1206 struct bfd_link_info
*info
,
1208 const Elf_Internal_Rela
*relocs
)
1210 struct elf_i386_link_hash_table
*htab
;
1211 Elf_Internal_Shdr
*symtab_hdr
;
1212 struct elf_link_hash_entry
**sym_hashes
;
1213 const Elf_Internal_Rela
*rel
;
1214 const Elf_Internal_Rela
*rel_end
;
1217 if (info
->relocatable
)
1220 BFD_ASSERT (is_i386_elf (abfd
));
1222 htab
= elf_i386_hash_table (info
);
1223 symtab_hdr
= &elf_symtab_hdr (abfd
);
1224 sym_hashes
= elf_sym_hashes (abfd
);
1228 rel_end
= relocs
+ sec
->reloc_count
;
1229 for (rel
= relocs
; rel
< rel_end
; rel
++)
1231 unsigned int r_type
;
1232 unsigned long r_symndx
;
1233 struct elf_link_hash_entry
*h
;
1235 r_symndx
= ELF32_R_SYM (rel
->r_info
);
1236 r_type
= ELF32_R_TYPE (rel
->r_info
);
1238 if (r_symndx
>= NUM_SHDR_ENTRIES (symtab_hdr
))
1240 (*_bfd_error_handler
) (_("%B: bad symbol index: %d"),
1246 if (r_symndx
< symtab_hdr
->sh_info
)
1250 h
= sym_hashes
[r_symndx
- symtab_hdr
->sh_info
];
1251 while (h
->root
.type
== bfd_link_hash_indirect
1252 || h
->root
.type
== bfd_link_hash_warning
)
1253 h
= (struct elf_link_hash_entry
*) h
->root
.u
.i
.link
;
1256 if (! elf_i386_tls_transition (info
, abfd
, sec
, NULL
,
1257 symtab_hdr
, sym_hashes
,
1258 &r_type
, GOT_UNKNOWN
,
1265 htab
->tls_ldm_got
.refcount
+= 1;
1269 /* This symbol requires a procedure linkage table entry. We
1270 actually build the entry in adjust_dynamic_symbol,
1271 because this might be a case of linking PIC code which is
1272 never referenced by a dynamic object, in which case we
1273 don't need to generate a procedure linkage table entry
1276 /* If this is a local symbol, we resolve it directly without
1277 creating a procedure linkage table entry. */
1282 h
->plt
.refcount
+= 1;
1285 case R_386_TLS_IE_32
:
1287 case R_386_TLS_GOTIE
:
1289 info
->flags
|= DF_STATIC_TLS
;
1294 case R_386_TLS_GOTDESC
:
1295 case R_386_TLS_DESC_CALL
:
1296 /* This symbol requires a global offset table entry. */
1298 int tls_type
, old_tls_type
;
1303 case R_386_GOT32
: tls_type
= GOT_NORMAL
; break;
1304 case R_386_TLS_GD
: tls_type
= GOT_TLS_GD
; break;
1305 case R_386_TLS_GOTDESC
:
1306 case R_386_TLS_DESC_CALL
:
1307 tls_type
= GOT_TLS_GDESC
; break;
1308 case R_386_TLS_IE_32
:
1309 if (ELF32_R_TYPE (rel
->r_info
) == r_type
)
1310 tls_type
= GOT_TLS_IE_NEG
;
1312 /* If this is a GD->IE transition, we may use either of
1313 R_386_TLS_TPOFF and R_386_TLS_TPOFF32. */
1314 tls_type
= GOT_TLS_IE
;
1317 case R_386_TLS_GOTIE
:
1318 tls_type
= GOT_TLS_IE_POS
; break;
1323 h
->got
.refcount
+= 1;
1324 old_tls_type
= elf_i386_hash_entry(h
)->tls_type
;
1328 bfd_signed_vma
*local_got_refcounts
;
1330 /* This is a global offset table entry for a local symbol. */
1331 local_got_refcounts
= elf_local_got_refcounts (abfd
);
1332 if (local_got_refcounts
== NULL
)
1336 size
= symtab_hdr
->sh_info
;
1337 size
*= (sizeof (bfd_signed_vma
)
1338 + sizeof (bfd_vma
) + sizeof(char));
1339 local_got_refcounts
= bfd_zalloc (abfd
, size
);
1340 if (local_got_refcounts
== NULL
)
1342 elf_local_got_refcounts (abfd
) = local_got_refcounts
;
1343 elf_i386_local_tlsdesc_gotent (abfd
)
1344 = (bfd_vma
*) (local_got_refcounts
+ symtab_hdr
->sh_info
);
1345 elf_i386_local_got_tls_type (abfd
)
1346 = (char *) (local_got_refcounts
+ 2 * symtab_hdr
->sh_info
);
1348 local_got_refcounts
[r_symndx
] += 1;
1349 old_tls_type
= elf_i386_local_got_tls_type (abfd
) [r_symndx
];
1352 if ((old_tls_type
& GOT_TLS_IE
) && (tls_type
& GOT_TLS_IE
))
1353 tls_type
|= old_tls_type
;
1354 /* If a TLS symbol is accessed using IE at least once,
1355 there is no point to use dynamic model for it. */
1356 else if (old_tls_type
!= tls_type
&& old_tls_type
!= GOT_UNKNOWN
1357 && (! GOT_TLS_GD_ANY_P (old_tls_type
)
1358 || (tls_type
& GOT_TLS_IE
) == 0))
1360 if ((old_tls_type
& GOT_TLS_IE
) && GOT_TLS_GD_ANY_P (tls_type
))
1361 tls_type
= old_tls_type
;
1362 else if (GOT_TLS_GD_ANY_P (old_tls_type
)
1363 && GOT_TLS_GD_ANY_P (tls_type
))
1364 tls_type
|= old_tls_type
;
1367 (*_bfd_error_handler
)
1368 (_("%B: `%s' accessed both as normal and "
1369 "thread local symbol"),
1371 h
? h
->root
.root
.string
: "<local>");
1376 if (old_tls_type
!= tls_type
)
1379 elf_i386_hash_entry (h
)->tls_type
= tls_type
;
1381 elf_i386_local_got_tls_type (abfd
) [r_symndx
] = tls_type
;
1389 if (htab
->sgot
== NULL
)
1391 if (htab
->elf
.dynobj
== NULL
)
1392 htab
->elf
.dynobj
= abfd
;
1393 if (!elf_i386_create_got_section (htab
->elf
.dynobj
, info
))
1396 if (r_type
!= R_386_TLS_IE
)
1400 case R_386_TLS_LE_32
:
1404 info
->flags
|= DF_STATIC_TLS
;
1409 if (h
!= NULL
&& !info
->shared
)
1411 /* If this reloc is in a read-only section, we might
1412 need a copy reloc. We can't check reliably at this
1413 stage whether the section is read-only, as input
1414 sections have not yet been mapped to output sections.
1415 Tentatively set the flag for now, and correct in
1416 adjust_dynamic_symbol. */
1419 /* We may need a .plt entry if the function this reloc
1420 refers to is in a shared lib. */
1421 h
->plt
.refcount
+= 1;
1422 if (r_type
!= R_386_PC32
)
1423 h
->pointer_equality_needed
= 1;
1426 /* If we are creating a shared library, and this is a reloc
1427 against a global symbol, or a non PC relative reloc
1428 against a local symbol, then we need to copy the reloc
1429 into the shared library. However, if we are linking with
1430 -Bsymbolic, we do not need to copy a reloc against a
1431 global symbol which is defined in an object we are
1432 including in the link (i.e., DEF_REGULAR is set). At
1433 this point we have not seen all the input files, so it is
1434 possible that DEF_REGULAR is not set now but will be set
1435 later (it is never cleared). In case of a weak definition,
1436 DEF_REGULAR may be cleared later by a strong definition in
1437 a shared library. We account for that possibility below by
1438 storing information in the relocs_copied field of the hash
1439 table entry. A similar situation occurs when creating
1440 shared libraries and symbol visibility changes render the
1443 If on the other hand, we are creating an executable, we
1444 may need to keep relocations for symbols satisfied by a
1445 dynamic library if we manage to avoid copy relocs for the
1448 && (sec
->flags
& SEC_ALLOC
) != 0
1449 && (r_type
!= R_386_PC32
1451 && (! SYMBOLIC_BIND (info
, h
)
1452 || h
->root
.type
== bfd_link_hash_defweak
1453 || !h
->def_regular
))))
1454 || (ELIMINATE_COPY_RELOCS
1456 && (sec
->flags
& SEC_ALLOC
) != 0
1458 && (h
->root
.type
== bfd_link_hash_defweak
1459 || !h
->def_regular
)))
1461 struct elf_i386_dyn_relocs
*p
;
1462 struct elf_i386_dyn_relocs
**head
;
1464 /* We must copy these reloc types into the output file.
1465 Create a reloc section in dynobj and make room for
1469 if (htab
->elf
.dynobj
== NULL
)
1470 htab
->elf
.dynobj
= abfd
;
1472 sreloc
= _bfd_elf_make_dynamic_reloc_section
1473 (sec
, htab
->elf
.dynobj
, 2, abfd
, /*rela?*/ FALSE
);
1478 /* Create the ifunc section as well, even if we have not encountered a
1479 indirect function symbol yet. We may not even see one in the input
1480 object file, but we can still encounter them in libraries. */
1481 (void) _bfd_elf_make_ifunc_reloc_section
1482 (abfd
, sec
, htab
->elf
.dynobj
, 2);
1485 /* If this is a global symbol, we count the number of
1486 relocations we need for this symbol. */
1489 head
= &((struct elf_i386_link_hash_entry
*) h
)->dyn_relocs
;
1494 /* Track dynamic relocs needed for local syms too.
1495 We really need local syms available to do this
1499 s
= bfd_section_from_r_symndx (abfd
, &htab
->sym_sec
,
1504 vpp
= &elf_section_data (s
)->local_dynrel
;
1505 head
= (struct elf_i386_dyn_relocs
**)vpp
;
1509 if (p
== NULL
|| p
->sec
!= sec
)
1511 bfd_size_type amt
= sizeof *p
;
1512 p
= bfd_alloc (htab
->elf
.dynobj
, amt
);
1523 if (r_type
== R_386_PC32
)
1528 /* This relocation describes the C++ object vtable hierarchy.
1529 Reconstruct it for later use during GC. */
1530 case R_386_GNU_VTINHERIT
:
1531 if (!bfd_elf_gc_record_vtinherit (abfd
, sec
, h
, rel
->r_offset
))
1535 /* This relocation describes which C++ vtable entries are actually
1536 used. Record for later use during GC. */
1537 case R_386_GNU_VTENTRY
:
1538 BFD_ASSERT (h
!= NULL
);
1540 && !bfd_elf_gc_record_vtentry (abfd
, sec
, h
, rel
->r_offset
))
1552 /* Return the section that should be marked against GC for a given
1556 elf_i386_gc_mark_hook (asection
*sec
,
1557 struct bfd_link_info
*info
,
1558 Elf_Internal_Rela
*rel
,
1559 struct elf_link_hash_entry
*h
,
1560 Elf_Internal_Sym
*sym
)
1563 switch (ELF32_R_TYPE (rel
->r_info
))
1565 case R_386_GNU_VTINHERIT
:
1566 case R_386_GNU_VTENTRY
:
1570 return _bfd_elf_gc_mark_hook (sec
, info
, rel
, h
, sym
);
1573 /* Update the got entry reference counts for the section being removed. */
1576 elf_i386_gc_sweep_hook (bfd
*abfd
,
1577 struct bfd_link_info
*info
,
1579 const Elf_Internal_Rela
*relocs
)
1581 Elf_Internal_Shdr
*symtab_hdr
;
1582 struct elf_link_hash_entry
**sym_hashes
;
1583 bfd_signed_vma
*local_got_refcounts
;
1584 const Elf_Internal_Rela
*rel
, *relend
;
1586 if (info
->relocatable
)
1589 elf_section_data (sec
)->local_dynrel
= NULL
;
1591 symtab_hdr
= &elf_symtab_hdr (abfd
);
1592 sym_hashes
= elf_sym_hashes (abfd
);
1593 local_got_refcounts
= elf_local_got_refcounts (abfd
);
1595 relend
= relocs
+ sec
->reloc_count
;
1596 for (rel
= relocs
; rel
< relend
; rel
++)
1598 unsigned long r_symndx
;
1599 unsigned int r_type
;
1600 struct elf_link_hash_entry
*h
= NULL
;
1602 r_symndx
= ELF32_R_SYM (rel
->r_info
);
1603 if (r_symndx
>= symtab_hdr
->sh_info
)
1605 struct elf_i386_link_hash_entry
*eh
;
1606 struct elf_i386_dyn_relocs
**pp
;
1607 struct elf_i386_dyn_relocs
*p
;
1609 h
= sym_hashes
[r_symndx
- symtab_hdr
->sh_info
];
1610 while (h
->root
.type
== bfd_link_hash_indirect
1611 || h
->root
.type
== bfd_link_hash_warning
)
1612 h
= (struct elf_link_hash_entry
*) h
->root
.u
.i
.link
;
1613 eh
= (struct elf_i386_link_hash_entry
*) h
;
1615 for (pp
= &eh
->dyn_relocs
; (p
= *pp
) != NULL
; pp
= &p
->next
)
1618 /* Everything must go for SEC. */
1624 r_type
= ELF32_R_TYPE (rel
->r_info
);
1625 if (! elf_i386_tls_transition (info
, abfd
, sec
, NULL
,
1626 symtab_hdr
, sym_hashes
,
1627 &r_type
, GOT_UNKNOWN
,
1634 if (elf_i386_hash_table (info
)->tls_ldm_got
.refcount
> 0)
1635 elf_i386_hash_table (info
)->tls_ldm_got
.refcount
-= 1;
1639 case R_386_TLS_GOTDESC
:
1640 case R_386_TLS_DESC_CALL
:
1641 case R_386_TLS_IE_32
:
1643 case R_386_TLS_GOTIE
:
1647 if (h
->got
.refcount
> 0)
1648 h
->got
.refcount
-= 1;
1650 else if (local_got_refcounts
!= NULL
)
1652 if (local_got_refcounts
[r_symndx
] > 0)
1653 local_got_refcounts
[r_symndx
] -= 1;
1666 if (h
->plt
.refcount
> 0)
1667 h
->plt
.refcount
-= 1;
1679 /* Adjust a symbol defined by a dynamic object and referenced by a
1680 regular object. The current definition is in some section of the
1681 dynamic object, but we're not including those sections. We have to
1682 change the definition to something the rest of the link can
1686 elf_i386_adjust_dynamic_symbol (struct bfd_link_info
*info
,
1687 struct elf_link_hash_entry
*h
)
1689 struct elf_i386_link_hash_table
*htab
;
1692 /* If this is a function, put it in the procedure linkage table. We
1693 will fill in the contents of the procedure linkage table later,
1694 when we know the address of the .got section. */
1695 if (h
->type
== STT_FUNC
1698 if (h
->plt
.refcount
<= 0
1699 || SYMBOL_CALLS_LOCAL (info
, h
)
1700 || (ELF_ST_VISIBILITY (h
->other
) != STV_DEFAULT
1701 && h
->root
.type
== bfd_link_hash_undefweak
))
1703 /* This case can occur if we saw a PLT32 reloc in an input
1704 file, but the symbol was never referred to by a dynamic
1705 object, or if all references were garbage collected. In
1706 such a case, we don't actually need to build a procedure
1707 linkage table, and we can just do a PC32 reloc instead. */
1708 h
->plt
.offset
= (bfd_vma
) -1;
1715 /* It's possible that we incorrectly decided a .plt reloc was
1716 needed for an R_386_PC32 reloc to a non-function sym in
1717 check_relocs. We can't decide accurately between function and
1718 non-function syms in check-relocs; Objects loaded later in
1719 the link may change h->type. So fix it now. */
1720 h
->plt
.offset
= (bfd_vma
) -1;
1722 /* If this is a weak symbol, and there is a real definition, the
1723 processor independent code will have arranged for us to see the
1724 real definition first, and we can just use the same value. */
1725 if (h
->u
.weakdef
!= NULL
)
1727 BFD_ASSERT (h
->u
.weakdef
->root
.type
== bfd_link_hash_defined
1728 || h
->u
.weakdef
->root
.type
== bfd_link_hash_defweak
);
1729 h
->root
.u
.def
.section
= h
->u
.weakdef
->root
.u
.def
.section
;
1730 h
->root
.u
.def
.value
= h
->u
.weakdef
->root
.u
.def
.value
;
1731 if (ELIMINATE_COPY_RELOCS
|| info
->nocopyreloc
)
1732 h
->non_got_ref
= h
->u
.weakdef
->non_got_ref
;
1736 /* This is a reference to a symbol defined by a dynamic object which
1737 is not a function. */
1739 /* If we are creating a shared library, we must presume that the
1740 only references to the symbol are via the global offset table.
1741 For such cases we need not do anything here; the relocations will
1742 be handled correctly by relocate_section. */
1746 /* If there are no references to this symbol that do not use the
1747 GOT, we don't need to generate a copy reloc. */
1748 if (!h
->non_got_ref
)
1751 /* If -z nocopyreloc was given, we won't generate them either. */
1752 if (info
->nocopyreloc
)
1758 htab
= elf_i386_hash_table (info
);
1760 /* If there aren't any dynamic relocs in read-only sections, then
1761 we can keep the dynamic relocs and avoid the copy reloc. This
1762 doesn't work on VxWorks, where we can not have dynamic relocations
1763 (other than copy and jump slot relocations) in an executable. */
1764 if (ELIMINATE_COPY_RELOCS
&& !htab
->is_vxworks
)
1766 struct elf_i386_link_hash_entry
* eh
;
1767 struct elf_i386_dyn_relocs
*p
;
1769 eh
= (struct elf_i386_link_hash_entry
*) h
;
1770 for (p
= eh
->dyn_relocs
; p
!= NULL
; p
= p
->next
)
1772 s
= p
->sec
->output_section
;
1773 if (s
!= NULL
&& (s
->flags
& SEC_READONLY
) != 0)
1786 (*_bfd_error_handler
) (_("dynamic variable `%s' is zero size"),
1787 h
->root
.root
.string
);
1791 /* We must allocate the symbol in our .dynbss section, which will
1792 become part of the .bss section of the executable. There will be
1793 an entry for this symbol in the .dynsym section. The dynamic
1794 object will contain position independent code, so all references
1795 from the dynamic object to this symbol will go through the global
1796 offset table. The dynamic linker will use the .dynsym entry to
1797 determine the address it must put in the global offset table, so
1798 both the dynamic object and the regular object will refer to the
1799 same memory location for the variable. */
1801 /* We must generate a R_386_COPY reloc to tell the dynamic linker to
1802 copy the initial value out of the dynamic object and into the
1803 runtime process image. */
1804 if ((h
->root
.u
.def
.section
->flags
& SEC_ALLOC
) != 0)
1806 htab
->srelbss
->size
+= sizeof (Elf32_External_Rel
);
1812 return _bfd_elf_adjust_dynamic_copy (h
, s
);
1815 /* Allocate space in .plt, .got and associated reloc sections for
1819 elf_i386_allocate_dynrelocs (struct elf_link_hash_entry
*h
, void *inf
)
1821 struct bfd_link_info
*info
;
1822 struct elf_i386_link_hash_table
*htab
;
1823 struct elf_i386_link_hash_entry
*eh
;
1824 struct elf_i386_dyn_relocs
*p
;
1825 bfd_boolean use_indirect_section
= FALSE
;
1827 if (h
->root
.type
== bfd_link_hash_indirect
)
1830 if (h
->root
.type
== bfd_link_hash_warning
)
1831 /* When warning symbols are created, they **replace** the "real"
1832 entry in the hash table, thus we never get to see the real
1833 symbol in a hash traversal. So look at it now. */
1834 h
= (struct elf_link_hash_entry
*) h
->root
.u
.i
.link
;
1836 info
= (struct bfd_link_info
*) inf
;
1837 htab
= elf_i386_hash_table (info
);
1839 if (htab
->elf
.dynamic_sections_created
1840 && h
->plt
.refcount
> 0)
1842 /* Make sure this symbol is output as a dynamic symbol.
1843 Undefined weak syms won't yet be marked as dynamic. */
1844 if (h
->dynindx
== -1
1845 && !h
->forced_local
)
1847 if (! bfd_elf_link_record_dynamic_symbol (info
, h
))
1852 || WILL_CALL_FINISH_DYNAMIC_SYMBOL (1, 0, h
))
1854 asection
*s
= htab
->splt
;
1856 /* If this is the first .plt entry, make room for the special
1859 s
->size
+= PLT_ENTRY_SIZE
;
1861 h
->plt
.offset
= s
->size
;
1863 /* If this symbol is not defined in a regular file, and we are
1864 not generating a shared library, then set the symbol to this
1865 location in the .plt. This is required to make function
1866 pointers compare as equal between the normal executable and
1867 the shared library. */
1871 h
->root
.u
.def
.section
= s
;
1872 h
->root
.u
.def
.value
= h
->plt
.offset
;
1875 /* Make room for this entry. */
1876 s
->size
+= PLT_ENTRY_SIZE
;
1878 /* We also need to make an entry in the .got.plt section, which
1879 will be placed in the .got section by the linker script. */
1880 htab
->sgotplt
->size
+= 4;
1882 /* We also need to make an entry in the .rel.plt section. */
1883 htab
->srelplt
->size
+= sizeof (Elf32_External_Rel
);
1884 htab
->next_tls_desc_index
++;
1886 if (htab
->is_vxworks
&& !info
->shared
)
1888 /* VxWorks has a second set of relocations for each PLT entry
1889 in executables. They go in a separate relocation section,
1890 which is processed by the kernel loader. */
1892 /* There are two relocations for the initial PLT entry: an
1893 R_386_32 relocation for _GLOBAL_OFFSET_TABLE_ + 4 and an
1894 R_386_32 relocation for _GLOBAL_OFFSET_TABLE_ + 8. */
1896 if (h
->plt
.offset
== PLT_ENTRY_SIZE
)
1897 htab
->srelplt2
->size
+= (sizeof (Elf32_External_Rel
) * 2);
1899 /* There are two extra relocations for each subsequent PLT entry:
1900 an R_386_32 relocation for the GOT entry, and an R_386_32
1901 relocation for the PLT entry. */
1903 htab
->srelplt2
->size
+= (sizeof (Elf32_External_Rel
) * 2);
1908 h
->plt
.offset
= (bfd_vma
) -1;
1914 h
->plt
.offset
= (bfd_vma
) -1;
1918 eh
= (struct elf_i386_link_hash_entry
*) h
;
1919 eh
->tlsdesc_got
= (bfd_vma
) -1;
1921 /* If R_386_TLS_{IE_32,IE,GOTIE} symbol is now local to the binary,
1922 make it a R_386_TLS_LE_32 requiring no TLS entry. */
1923 if (h
->got
.refcount
> 0
1926 && (elf_i386_hash_entry(h
)->tls_type
& GOT_TLS_IE
))
1927 h
->got
.offset
= (bfd_vma
) -1;
1928 else if (h
->got
.refcount
> 0)
1932 int tls_type
= elf_i386_hash_entry(h
)->tls_type
;
1934 /* Make sure this symbol is output as a dynamic symbol.
1935 Undefined weak syms won't yet be marked as dynamic. */
1936 if (h
->dynindx
== -1
1937 && !h
->forced_local
)
1939 if (! bfd_elf_link_record_dynamic_symbol (info
, h
))
1944 if (GOT_TLS_GDESC_P (tls_type
))
1946 eh
->tlsdesc_got
= htab
->sgotplt
->size
1947 - elf_i386_compute_jump_table_size (htab
);
1948 htab
->sgotplt
->size
+= 8;
1949 h
->got
.offset
= (bfd_vma
) -2;
1951 if (! GOT_TLS_GDESC_P (tls_type
)
1952 || GOT_TLS_GD_P (tls_type
))
1954 h
->got
.offset
= s
->size
;
1956 /* R_386_TLS_GD needs 2 consecutive GOT slots. */
1957 if (GOT_TLS_GD_P (tls_type
) || tls_type
== GOT_TLS_IE_BOTH
)
1960 dyn
= htab
->elf
.dynamic_sections_created
;
1961 /* R_386_TLS_IE_32 needs one dynamic relocation,
1962 R_386_TLS_IE resp. R_386_TLS_GOTIE needs one dynamic relocation,
1963 (but if both R_386_TLS_IE_32 and R_386_TLS_IE is present, we
1964 need two), R_386_TLS_GD needs one if local symbol and two if
1966 if (tls_type
== GOT_TLS_IE_BOTH
)
1967 htab
->srelgot
->size
+= 2 * sizeof (Elf32_External_Rel
);
1968 else if ((GOT_TLS_GD_P (tls_type
) && h
->dynindx
== -1)
1969 || (tls_type
& GOT_TLS_IE
))
1970 htab
->srelgot
->size
+= sizeof (Elf32_External_Rel
);
1971 else if (GOT_TLS_GD_P (tls_type
))
1972 htab
->srelgot
->size
+= 2 * sizeof (Elf32_External_Rel
);
1973 else if (! GOT_TLS_GDESC_P (tls_type
)
1974 && (ELF_ST_VISIBILITY (h
->other
) == STV_DEFAULT
1975 || h
->root
.type
!= bfd_link_hash_undefweak
)
1977 || WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn
, 0, h
)))
1978 htab
->srelgot
->size
+= sizeof (Elf32_External_Rel
);
1979 if (GOT_TLS_GDESC_P (tls_type
))
1980 htab
->srelplt
->size
+= sizeof (Elf32_External_Rel
);
1983 h
->got
.offset
= (bfd_vma
) -1;
1985 if (eh
->dyn_relocs
== NULL
)
1988 /* In the shared -Bsymbolic case, discard space allocated for
1989 dynamic pc-relative relocs against symbols which turn out to be
1990 defined in regular objects. For the normal shared case, discard
1991 space for pc-relative relocs that have become local due to symbol
1992 visibility changes. */
1996 /* The only reloc that uses pc_count is R_386_PC32, which will
1997 appear on a call or on something like ".long foo - .". We
1998 want calls to protected symbols to resolve directly to the
1999 function rather than going via the plt. If people want
2000 function pointer comparisons to work as expected then they
2001 should avoid writing assembly like ".long foo - .". */
2002 if (SYMBOL_CALLS_LOCAL (info
, h
))
2004 struct elf_i386_dyn_relocs
**pp
;
2006 for (pp
= &eh
->dyn_relocs
; (p
= *pp
) != NULL
; )
2008 p
->count
-= p
->pc_count
;
2017 if (htab
->is_vxworks
)
2019 struct elf_i386_dyn_relocs
**pp
;
2020 for (pp
= &eh
->dyn_relocs
; (p
= *pp
) != NULL
; )
2022 if (strcmp (p
->sec
->output_section
->name
, ".tls_vars") == 0)
2029 /* Also discard relocs on undefined weak syms with non-default
2031 if (eh
->dyn_relocs
!= NULL
2032 && h
->root
.type
== bfd_link_hash_undefweak
)
2034 if (ELF_ST_VISIBILITY (h
->other
) != STV_DEFAULT
)
2035 eh
->dyn_relocs
= NULL
;
2037 /* Make sure undefined weak symbols are output as a dynamic
2039 else if (h
->dynindx
== -1
2040 && !h
->forced_local
)
2042 if (! bfd_elf_link_record_dynamic_symbol (info
, h
))
2047 else if (_bfd_elf_is_ifunc_symbol (info
->output_bfd
, h
)
2049 && ! h
->forced_local
)
2051 if (bfd_elf_link_record_dynamic_symbol (info
, h
)
2052 && h
->dynindx
!= -1)
2053 use_indirect_section
= TRUE
;
2057 else if (ELIMINATE_COPY_RELOCS
)
2059 /* For the non-shared case, discard space for relocs against
2060 symbols which turn out to need copy relocs or are not
2066 || (htab
->elf
.dynamic_sections_created
2067 && (h
->root
.type
== bfd_link_hash_undefweak
2068 || h
->root
.type
== bfd_link_hash_undefined
))))
2070 /* Make sure this symbol is output as a dynamic symbol.
2071 Undefined weak syms won't yet be marked as dynamic. */
2072 if (h
->dynindx
== -1
2073 && !h
->forced_local
)
2075 if (! bfd_elf_link_record_dynamic_symbol (info
, h
))
2079 /* If that succeeded, we know we'll be keeping all the
2081 if (h
->dynindx
!= -1)
2085 eh
->dyn_relocs
= NULL
;
2090 /* Finally, allocate space. */
2091 for (p
= eh
->dyn_relocs
; p
!= NULL
; p
= p
->next
)
2095 if (use_indirect_section
)
2096 sreloc
= elf_section_data (p
->sec
)->indirect_relocs
;
2098 sreloc
= elf_section_data (p
->sec
)->sreloc
;
2100 BFD_ASSERT (sreloc
!= NULL
);
2101 sreloc
->size
+= p
->count
* sizeof (Elf32_External_Rel
);
2107 /* Find any dynamic relocs that apply to read-only sections. */
2110 elf_i386_readonly_dynrelocs (struct elf_link_hash_entry
*h
, void *inf
)
2112 struct elf_i386_link_hash_entry
*eh
;
2113 struct elf_i386_dyn_relocs
*p
;
2115 if (h
->root
.type
== bfd_link_hash_warning
)
2116 h
= (struct elf_link_hash_entry
*) h
->root
.u
.i
.link
;
2118 eh
= (struct elf_i386_link_hash_entry
*) h
;
2119 for (p
= eh
->dyn_relocs
; p
!= NULL
; p
= p
->next
)
2121 asection
*s
= p
->sec
->output_section
;
2123 if (s
!= NULL
&& (s
->flags
& SEC_READONLY
) != 0)
2125 struct bfd_link_info
*info
= (struct bfd_link_info
*) inf
;
2127 info
->flags
|= DF_TEXTREL
;
2129 /* Not an error, just cut short the traversal. */
2136 /* Set the sizes of the dynamic sections. */
2139 elf_i386_size_dynamic_sections (bfd
*output_bfd ATTRIBUTE_UNUSED
,
2140 struct bfd_link_info
*info
)
2142 struct elf_i386_link_hash_table
*htab
;
2148 htab
= elf_i386_hash_table (info
);
2149 dynobj
= htab
->elf
.dynobj
;
2153 if (htab
->elf
.dynamic_sections_created
)
2155 /* Set the contents of the .interp section to the interpreter. */
2156 if (info
->executable
)
2158 s
= bfd_get_section_by_name (dynobj
, ".interp");
2161 s
->size
= sizeof ELF_DYNAMIC_INTERPRETER
;
2162 s
->contents
= (unsigned char *) ELF_DYNAMIC_INTERPRETER
;
2166 /* Set up .got offsets for local syms, and space for local dynamic
2168 for (ibfd
= info
->input_bfds
; ibfd
!= NULL
; ibfd
= ibfd
->link_next
)
2170 bfd_signed_vma
*local_got
;
2171 bfd_signed_vma
*end_local_got
;
2172 char *local_tls_type
;
2173 bfd_vma
*local_tlsdesc_gotent
;
2174 bfd_size_type locsymcount
;
2175 Elf_Internal_Shdr
*symtab_hdr
;
2178 if (! is_i386_elf (ibfd
))
2181 for (s
= ibfd
->sections
; s
!= NULL
; s
= s
->next
)
2183 struct elf_i386_dyn_relocs
*p
;
2185 for (p
= ((struct elf_i386_dyn_relocs
*)
2186 elf_section_data (s
)->local_dynrel
);
2190 if (!bfd_is_abs_section (p
->sec
)
2191 && bfd_is_abs_section (p
->sec
->output_section
))
2193 /* Input section has been discarded, either because
2194 it is a copy of a linkonce section or due to
2195 linker script /DISCARD/, so we'll be discarding
2198 else if (htab
->is_vxworks
2199 && strcmp (p
->sec
->output_section
->name
,
2202 /* Relocations in vxworks .tls_vars sections are
2203 handled specially by the loader. */
2205 else if (p
->count
!= 0)
2207 srel
= elf_section_data (p
->sec
)->sreloc
;
2208 srel
->size
+= p
->count
* sizeof (Elf32_External_Rel
);
2209 if ((p
->sec
->output_section
->flags
& SEC_READONLY
) != 0)
2210 info
->flags
|= DF_TEXTREL
;
2215 local_got
= elf_local_got_refcounts (ibfd
);
2219 symtab_hdr
= &elf_symtab_hdr (ibfd
);
2220 locsymcount
= symtab_hdr
->sh_info
;
2221 end_local_got
= local_got
+ locsymcount
;
2222 local_tls_type
= elf_i386_local_got_tls_type (ibfd
);
2223 local_tlsdesc_gotent
= elf_i386_local_tlsdesc_gotent (ibfd
);
2225 srel
= htab
->srelgot
;
2226 for (; local_got
< end_local_got
;
2227 ++local_got
, ++local_tls_type
, ++local_tlsdesc_gotent
)
2229 *local_tlsdesc_gotent
= (bfd_vma
) -1;
2232 if (GOT_TLS_GDESC_P (*local_tls_type
))
2234 *local_tlsdesc_gotent
= htab
->sgotplt
->size
2235 - elf_i386_compute_jump_table_size (htab
);
2236 htab
->sgotplt
->size
+= 8;
2237 *local_got
= (bfd_vma
) -2;
2239 if (! GOT_TLS_GDESC_P (*local_tls_type
)
2240 || GOT_TLS_GD_P (*local_tls_type
))
2242 *local_got
= s
->size
;
2244 if (GOT_TLS_GD_P (*local_tls_type
)
2245 || *local_tls_type
== GOT_TLS_IE_BOTH
)
2249 || GOT_TLS_GD_ANY_P (*local_tls_type
)
2250 || (*local_tls_type
& GOT_TLS_IE
))
2252 if (*local_tls_type
== GOT_TLS_IE_BOTH
)
2253 srel
->size
+= 2 * sizeof (Elf32_External_Rel
);
2254 else if (GOT_TLS_GD_P (*local_tls_type
)
2255 || ! GOT_TLS_GDESC_P (*local_tls_type
))
2256 srel
->size
+= sizeof (Elf32_External_Rel
);
2257 if (GOT_TLS_GDESC_P (*local_tls_type
))
2258 htab
->srelplt
->size
+= sizeof (Elf32_External_Rel
);
2262 *local_got
= (bfd_vma
) -1;
2266 if (htab
->tls_ldm_got
.refcount
> 0)
2268 /* Allocate 2 got entries and 1 dynamic reloc for R_386_TLS_LDM
2270 htab
->tls_ldm_got
.offset
= htab
->sgot
->size
;
2271 htab
->sgot
->size
+= 8;
2272 htab
->srelgot
->size
+= sizeof (Elf32_External_Rel
);
2275 htab
->tls_ldm_got
.offset
= -1;
2277 /* Allocate global sym .plt and .got entries, and space for global
2278 sym dynamic relocs. */
2279 elf_link_hash_traverse (&htab
->elf
, elf_i386_allocate_dynrelocs
, info
);
2281 /* For every jump slot reserved in the sgotplt, reloc_count is
2282 incremented. However, when we reserve space for TLS descriptors,
2283 it's not incremented, so in order to compute the space reserved
2284 for them, it suffices to multiply the reloc count by the jump
2287 htab
->sgotplt_jump_table_size
= htab
->next_tls_desc_index
* 4;
2289 /* We now have determined the sizes of the various dynamic sections.
2290 Allocate memory for them. */
2292 for (s
= dynobj
->sections
; s
!= NULL
; s
= s
->next
)
2294 bfd_boolean strip_section
= TRUE
;
2296 if ((s
->flags
& SEC_LINKER_CREATED
) == 0)
2301 || s
== htab
->sgotplt
2302 || s
== htab
->sdynbss
)
2304 /* Strip this section if we don't need it; see the
2306 /* We'd like to strip these sections if they aren't needed, but if
2307 we've exported dynamic symbols from them we must leave them.
2308 It's too late to tell BFD to get rid of the symbols. */
2310 if (htab
->elf
.hplt
!= NULL
)
2311 strip_section
= FALSE
;
2313 else if (CONST_STRNEQ (bfd_get_section_name (dynobj
, s
), ".rel"))
2315 if (s
->size
!= 0 && s
!= htab
->srelplt
&& s
!= htab
->srelplt2
)
2318 /* We use the reloc_count field as a counter if we need
2319 to copy relocs into the output file. */
2324 /* It's not one of our sections, so don't allocate space. */
2330 /* If we don't need this section, strip it from the
2331 output file. This is mostly to handle .rel.bss and
2332 .rel.plt. We must create both sections in
2333 create_dynamic_sections, because they must be created
2334 before the linker maps input sections to output
2335 sections. The linker does that before
2336 adjust_dynamic_symbol is called, and it is that
2337 function which decides whether anything needs to go
2338 into these sections. */
2340 s
->flags
|= SEC_EXCLUDE
;
2344 if ((s
->flags
& SEC_HAS_CONTENTS
) == 0)
2347 /* Allocate memory for the section contents. We use bfd_zalloc
2348 here in case unused entries are not reclaimed before the
2349 section's contents are written out. This should not happen,
2350 but this way if it does, we get a R_386_NONE reloc instead
2352 s
->contents
= bfd_zalloc (dynobj
, s
->size
);
2353 if (s
->contents
== NULL
)
2357 if (htab
->elf
.dynamic_sections_created
)
2359 /* Add some entries to the .dynamic section. We fill in the
2360 values later, in elf_i386_finish_dynamic_sections, but we
2361 must add the entries now so that we get the correct size for
2362 the .dynamic section. The DT_DEBUG entry is filled in by the
2363 dynamic linker and used by the debugger. */
2364 #define add_dynamic_entry(TAG, VAL) \
2365 _bfd_elf_add_dynamic_entry (info, TAG, VAL)
2367 if (info
->executable
)
2369 if (!add_dynamic_entry (DT_DEBUG
, 0))
2373 if (htab
->splt
->size
!= 0)
2375 if (!add_dynamic_entry (DT_PLTGOT
, 0)
2376 || !add_dynamic_entry (DT_PLTRELSZ
, 0)
2377 || !add_dynamic_entry (DT_PLTREL
, DT_REL
)
2378 || !add_dynamic_entry (DT_JMPREL
, 0))
2384 if (!add_dynamic_entry (DT_REL
, 0)
2385 || !add_dynamic_entry (DT_RELSZ
, 0)
2386 || !add_dynamic_entry (DT_RELENT
, sizeof (Elf32_External_Rel
)))
2389 /* If any dynamic relocs apply to a read-only section,
2390 then we need a DT_TEXTREL entry. */
2391 if ((info
->flags
& DF_TEXTREL
) == 0)
2392 elf_link_hash_traverse (&htab
->elf
,
2393 elf_i386_readonly_dynrelocs
, info
);
2395 if ((info
->flags
& DF_TEXTREL
) != 0)
2397 if (!add_dynamic_entry (DT_TEXTREL
, 0))
2401 if (htab
->is_vxworks
2402 && !elf_vxworks_add_dynamic_entries (output_bfd
, info
))
2405 #undef add_dynamic_entry
2411 elf_i386_always_size_sections (bfd
*output_bfd
,
2412 struct bfd_link_info
*info
)
2414 asection
*tls_sec
= elf_hash_table (info
)->tls_sec
;
2418 struct elf_link_hash_entry
*tlsbase
;
2420 tlsbase
= elf_link_hash_lookup (elf_hash_table (info
),
2421 "_TLS_MODULE_BASE_",
2422 FALSE
, FALSE
, FALSE
);
2424 if (tlsbase
&& tlsbase
->type
== STT_TLS
)
2426 struct bfd_link_hash_entry
*bh
= NULL
;
2427 const struct elf_backend_data
*bed
2428 = get_elf_backend_data (output_bfd
);
2430 if (!(_bfd_generic_link_add_one_symbol
2431 (info
, output_bfd
, "_TLS_MODULE_BASE_", BSF_LOCAL
,
2432 tls_sec
, 0, NULL
, FALSE
,
2433 bed
->collect
, &bh
)))
2436 elf_i386_hash_table (info
)->tls_module_base
= bh
;
2438 tlsbase
= (struct elf_link_hash_entry
*)bh
;
2439 tlsbase
->def_regular
= 1;
2440 tlsbase
->other
= STV_HIDDEN
;
2441 (*bed
->elf_backend_hide_symbol
) (info
, tlsbase
, TRUE
);
2448 /* Set the correct type for an x86 ELF section. We do this by the
2449 section name, which is a hack, but ought to work. */
2452 elf_i386_fake_sections (bfd
*abfd ATTRIBUTE_UNUSED
,
2453 Elf_Internal_Shdr
*hdr
,
2456 register const char *name
;
2458 name
= bfd_get_section_name (abfd
, sec
);
2460 /* This is an ugly, but unfortunately necessary hack that is
2461 needed when producing EFI binaries on x86. It tells
2462 elf.c:elf_fake_sections() not to consider ".reloc" as a section
2463 containing ELF relocation info. We need this hack in order to
2464 be able to generate ELF binaries that can be translated into
2465 EFI applications (which are essentially COFF objects). Those
2466 files contain a COFF ".reloc" section inside an ELFNN object,
2467 which would normally cause BFD to segfault because it would
2468 attempt to interpret this section as containing relocation
2469 entries for section "oc". With this hack enabled, ".reloc"
2470 will be treated as a normal data section, which will avoid the
2471 segfault. However, you won't be able to create an ELFNN binary
2472 with a section named "oc" that needs relocations, but that's
2473 the kind of ugly side-effects you get when detecting section
2474 types based on their names... In practice, this limitation is
2475 unlikely to bite. */
2476 if (strcmp (name
, ".reloc") == 0)
2477 hdr
->sh_type
= SHT_PROGBITS
;
2482 /* _TLS_MODULE_BASE_ needs to be treated especially when linking
2483 executables. Rather than setting it to the beginning of the TLS
2484 section, we have to set it to the end. This function may be called
2485 multiple times, it is idempotent. */
2488 elf_i386_set_tls_module_base (struct bfd_link_info
*info
)
2490 struct bfd_link_hash_entry
*base
;
2492 if (!info
->executable
)
2495 base
= elf_i386_hash_table (info
)->tls_module_base
;
2500 base
->u
.def
.value
= elf_hash_table (info
)->tls_size
;
2503 /* Return the base VMA address which should be subtracted from real addresses
2504 when resolving @dtpoff relocation.
2505 This is PT_TLS segment p_vaddr. */
2508 elf_i386_dtpoff_base (struct bfd_link_info
*info
)
2510 /* If tls_sec is NULL, we should have signalled an error already. */
2511 if (elf_hash_table (info
)->tls_sec
== NULL
)
2513 return elf_hash_table (info
)->tls_sec
->vma
;
2516 /* Return the relocation value for @tpoff relocation
2517 if STT_TLS virtual address is ADDRESS. */
2520 elf_i386_tpoff (struct bfd_link_info
*info
, bfd_vma address
)
2522 struct elf_link_hash_table
*htab
= elf_hash_table (info
);
2524 /* If tls_sec is NULL, we should have signalled an error already. */
2525 if (htab
->tls_sec
== NULL
)
2527 return htab
->tls_size
+ htab
->tls_sec
->vma
- address
;
2530 /* Relocate an i386 ELF section. */
2533 elf_i386_relocate_section (bfd
*output_bfd
,
2534 struct bfd_link_info
*info
,
2536 asection
*input_section
,
2538 Elf_Internal_Rela
*relocs
,
2539 Elf_Internal_Sym
*local_syms
,
2540 asection
**local_sections
)
2542 struct elf_i386_link_hash_table
*htab
;
2543 Elf_Internal_Shdr
*symtab_hdr
;
2544 struct elf_link_hash_entry
**sym_hashes
;
2545 bfd_vma
*local_got_offsets
;
2546 bfd_vma
*local_tlsdesc_gotents
;
2547 Elf_Internal_Rela
*rel
;
2548 Elf_Internal_Rela
*relend
;
2549 bfd_boolean is_vxworks_tls
;
2551 BFD_ASSERT (is_i386_elf (input_bfd
));
2553 htab
= elf_i386_hash_table (info
);
2554 symtab_hdr
= &elf_symtab_hdr (input_bfd
);
2555 sym_hashes
= elf_sym_hashes (input_bfd
);
2556 local_got_offsets
= elf_local_got_offsets (input_bfd
);
2557 local_tlsdesc_gotents
= elf_i386_local_tlsdesc_gotent (input_bfd
);
2558 /* We have to handle relocations in vxworks .tls_vars sections
2559 specially, because the dynamic loader is 'weird'. */
2560 is_vxworks_tls
= (htab
->is_vxworks
&& info
->shared
2561 && !strcmp (input_section
->output_section
->name
,
2564 elf_i386_set_tls_module_base (info
);
2567 relend
= relocs
+ input_section
->reloc_count
;
2568 for (; rel
< relend
; rel
++)
2570 unsigned int r_type
;
2571 reloc_howto_type
*howto
;
2572 unsigned long r_symndx
;
2573 struct elf_link_hash_entry
*h
;
2574 Elf_Internal_Sym
*sym
;
2576 bfd_vma off
, offplt
;
2578 bfd_boolean unresolved_reloc
;
2579 bfd_reloc_status_type r
;
2583 r_type
= ELF32_R_TYPE (rel
->r_info
);
2584 if (r_type
== R_386_GNU_VTINHERIT
2585 || r_type
== R_386_GNU_VTENTRY
)
2588 if ((indx
= r_type
) >= R_386_standard
2589 && ((indx
= r_type
- R_386_ext_offset
) - R_386_standard
2590 >= R_386_ext
- R_386_standard
)
2591 && ((indx
= r_type
- R_386_tls_offset
) - R_386_ext
2592 >= R_386_tls
- R_386_ext
))
2594 (*_bfd_error_handler
)
2595 (_("%B: unrecognized relocation (0x%x) in section `%A'"),
2596 input_bfd
, input_section
, r_type
);
2597 bfd_set_error (bfd_error_bad_value
);
2600 howto
= elf_howto_table
+ indx
;
2602 r_symndx
= ELF32_R_SYM (rel
->r_info
);
2606 unresolved_reloc
= FALSE
;
2607 if (r_symndx
< symtab_hdr
->sh_info
)
2609 sym
= local_syms
+ r_symndx
;
2610 sec
= local_sections
[r_symndx
];
2611 relocation
= (sec
->output_section
->vma
2612 + sec
->output_offset
2615 if (ELF_ST_TYPE (sym
->st_info
) == STT_SECTION
2616 && ((sec
->flags
& SEC_MERGE
) != 0
2617 || (info
->relocatable
2618 && sec
->output_offset
!= 0)))
2621 bfd_byte
*where
= contents
+ rel
->r_offset
;
2623 switch (howto
->size
)
2626 addend
= bfd_get_8 (input_bfd
, where
);
2627 if (howto
->pc_relative
)
2629 addend
= (addend
^ 0x80) - 0x80;
2634 addend
= bfd_get_16 (input_bfd
, where
);
2635 if (howto
->pc_relative
)
2637 addend
= (addend
^ 0x8000) - 0x8000;
2642 addend
= bfd_get_32 (input_bfd
, where
);
2643 if (howto
->pc_relative
)
2645 addend
= (addend
^ 0x80000000) - 0x80000000;
2653 if (info
->relocatable
)
2654 addend
+= sec
->output_offset
;
2657 asection
*msec
= sec
;
2658 addend
= _bfd_elf_rel_local_sym (output_bfd
, sym
, &msec
,
2660 addend
-= relocation
;
2661 addend
+= msec
->output_section
->vma
+ msec
->output_offset
;
2664 switch (howto
->size
)
2667 /* FIXME: overflow checks. */
2668 if (howto
->pc_relative
)
2670 bfd_put_8 (input_bfd
, addend
, where
);
2673 if (howto
->pc_relative
)
2675 bfd_put_16 (input_bfd
, addend
, where
);
2678 if (howto
->pc_relative
)
2680 bfd_put_32 (input_bfd
, addend
, where
);
2689 RELOC_FOR_GLOBAL_SYMBOL (info
, input_bfd
, input_section
, rel
,
2690 r_symndx
, symtab_hdr
, sym_hashes
,
2692 unresolved_reloc
, warned
);
2695 if (sec
!= NULL
&& elf_discarded_section (sec
))
2697 /* For relocs against symbols from removed linkonce sections,
2698 or sections discarded by a linker script, we just want the
2699 section contents zeroed. Avoid any special processing. */
2700 _bfd_clear_contents (howto
, input_bfd
, contents
+ rel
->r_offset
);
2706 if (info
->relocatable
)
2712 /* Relocation is to the entry for this symbol in the global
2714 if (htab
->sgot
== NULL
)
2721 off
= h
->got
.offset
;
2722 dyn
= htab
->elf
.dynamic_sections_created
;
2723 if (! WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn
, info
->shared
, h
)
2725 && SYMBOL_REFERENCES_LOCAL (info
, h
))
2726 || (ELF_ST_VISIBILITY (h
->other
)
2727 && h
->root
.type
== bfd_link_hash_undefweak
))
2729 /* This is actually a static link, or it is a
2730 -Bsymbolic link and the symbol is defined
2731 locally, or the symbol was forced to be local
2732 because of a version file. We must initialize
2733 this entry in the global offset table. Since the
2734 offset must always be a multiple of 4, we use the
2735 least significant bit to record whether we have
2736 initialized it already.
2738 When doing a dynamic link, we create a .rel.got
2739 relocation entry to initialize the value. This
2740 is done in the finish_dynamic_symbol routine. */
2745 bfd_put_32 (output_bfd
, relocation
,
2746 htab
->sgot
->contents
+ off
);
2751 unresolved_reloc
= FALSE
;
2755 if (local_got_offsets
== NULL
)
2758 off
= local_got_offsets
[r_symndx
];
2760 /* The offset must always be a multiple of 4. We use
2761 the least significant bit to record whether we have
2762 already generated the necessary reloc. */
2767 bfd_put_32 (output_bfd
, relocation
,
2768 htab
->sgot
->contents
+ off
);
2773 Elf_Internal_Rela outrel
;
2780 outrel
.r_offset
= (htab
->sgot
->output_section
->vma
2781 + htab
->sgot
->output_offset
2783 outrel
.r_info
= ELF32_R_INFO (0, R_386_RELATIVE
);
2785 loc
+= s
->reloc_count
++ * sizeof (Elf32_External_Rel
);
2786 bfd_elf32_swap_reloc_out (output_bfd
, &outrel
, loc
);
2789 local_got_offsets
[r_symndx
] |= 1;
2793 if (off
>= (bfd_vma
) -2)
2796 relocation
= htab
->sgot
->output_section
->vma
2797 + htab
->sgot
->output_offset
+ off
2798 - htab
->sgotplt
->output_section
->vma
2799 - htab
->sgotplt
->output_offset
;
2803 /* Relocation is relative to the start of the global offset
2806 /* Check to make sure it isn't a protected function symbol
2807 for shared library since it may not be local when used
2808 as function address. We also need to make sure that a
2809 symbol is defined locally. */
2810 if (info
->shared
&& h
)
2812 if (!h
->def_regular
)
2816 switch (ELF_ST_VISIBILITY (h
->other
))
2819 v
= _("hidden symbol");
2822 v
= _("internal symbol");
2825 v
= _("protected symbol");
2832 (*_bfd_error_handler
)
2833 (_("%B: relocation R_386_GOTOFF against undefined %s `%s' can not be used when making a shared object"),
2834 input_bfd
, v
, h
->root
.root
.string
);
2835 bfd_set_error (bfd_error_bad_value
);
2838 else if (!info
->executable
2839 && h
->type
== STT_FUNC
2840 && ELF_ST_VISIBILITY (h
->other
) == STV_PROTECTED
)
2842 (*_bfd_error_handler
)
2843 (_("%B: relocation R_386_GOTOFF against protected function `%s' can not be used when making a shared object"),
2844 input_bfd
, h
->root
.root
.string
);
2845 bfd_set_error (bfd_error_bad_value
);
2850 /* Note that sgot is not involved in this
2851 calculation. We always want the start of .got.plt. If we
2852 defined _GLOBAL_OFFSET_TABLE_ in a different way, as is
2853 permitted by the ABI, we might have to change this
2855 relocation
-= htab
->sgotplt
->output_section
->vma
2856 + htab
->sgotplt
->output_offset
;
2860 /* Use global offset table as symbol value. */
2861 relocation
= htab
->sgotplt
->output_section
->vma
2862 + htab
->sgotplt
->output_offset
;
2863 unresolved_reloc
= FALSE
;
2867 /* Relocation is to the entry for this symbol in the
2868 procedure linkage table. */
2870 /* Resolve a PLT32 reloc against a local symbol directly,
2871 without using the procedure linkage table. */
2875 if (h
->plt
.offset
== (bfd_vma
) -1
2876 || htab
->splt
== NULL
)
2878 /* We didn't make a PLT entry for this symbol. This
2879 happens when statically linking PIC code, or when
2880 using -Bsymbolic. */
2884 relocation
= (htab
->splt
->output_section
->vma
2885 + htab
->splt
->output_offset
2887 unresolved_reloc
= FALSE
;
2892 if ((input_section
->flags
& SEC_ALLOC
) == 0
2898 || ELF_ST_VISIBILITY (h
->other
) == STV_DEFAULT
2899 || h
->root
.type
!= bfd_link_hash_undefweak
)
2900 && (r_type
!= R_386_PC32
2901 || !SYMBOL_CALLS_LOCAL (info
, h
)))
2905 && ! h
->forced_local
2906 && ((struct elf_i386_link_hash_entry
*) h
)->dyn_relocs
!= NULL
2907 && _bfd_elf_is_ifunc_symbol (output_bfd
, h
))
2908 || (ELIMINATE_COPY_RELOCS
2915 || h
->root
.type
== bfd_link_hash_undefweak
2916 || h
->root
.type
== bfd_link_hash_undefined
)))
2918 Elf_Internal_Rela outrel
;
2920 bfd_boolean skip
, relocate
;
2923 /* When generating a shared object, these relocations
2924 are copied into the output file to be resolved at run
2931 _bfd_elf_section_offset (output_bfd
, info
, input_section
,
2933 if (outrel
.r_offset
== (bfd_vma
) -1)
2935 else if (outrel
.r_offset
== (bfd_vma
) -2)
2936 skip
= TRUE
, relocate
= TRUE
;
2937 outrel
.r_offset
+= (input_section
->output_section
->vma
2938 + input_section
->output_offset
);
2941 memset (&outrel
, 0, sizeof outrel
);
2944 && (r_type
== R_386_PC32
2946 || !SYMBOLIC_BIND (info
, h
)
2947 || !h
->def_regular
))
2948 outrel
.r_info
= ELF32_R_INFO (h
->dynindx
, r_type
);
2951 /* This symbol is local, or marked to become local. */
2953 outrel
.r_info
= ELF32_R_INFO (0, R_386_RELATIVE
);
2959 && ! h
->forced_local
2960 && _bfd_elf_is_ifunc_symbol (output_bfd
, h
)
2961 && elf_section_data (input_section
)->indirect_relocs
!= NULL
2962 && elf_section_data (input_section
)->indirect_relocs
->contents
!= NULL
)
2963 sreloc
= elf_section_data (input_section
)->indirect_relocs
;
2965 sreloc
= elf_section_data (input_section
)->sreloc
;
2967 BFD_ASSERT (sreloc
!= NULL
&& sreloc
->contents
!= NULL
);
2969 loc
= sreloc
->contents
;
2970 loc
+= sreloc
->reloc_count
++ * sizeof (Elf32_External_Rel
);
2972 bfd_elf32_swap_reloc_out (output_bfd
, &outrel
, loc
);
2974 /* If this reloc is against an external symbol, we do
2975 not want to fiddle with the addend. Otherwise, we
2976 need to include the symbol value so that it becomes
2977 an addend for the dynamic reloc. */
2986 Elf_Internal_Rela outrel
;
2990 outrel
.r_offset
= rel
->r_offset
2991 + input_section
->output_section
->vma
2992 + input_section
->output_offset
;
2993 outrel
.r_info
= ELF32_R_INFO (0, R_386_RELATIVE
);
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
);
3004 case R_386_TLS_GOTDESC
:
3005 case R_386_TLS_DESC_CALL
:
3006 case R_386_TLS_IE_32
:
3007 case R_386_TLS_GOTIE
:
3008 tls_type
= GOT_UNKNOWN
;
3009 if (h
== NULL
&& local_got_offsets
)
3010 tls_type
= elf_i386_local_got_tls_type (input_bfd
) [r_symndx
];
3012 tls_type
= elf_i386_hash_entry(h
)->tls_type
;
3013 if (tls_type
== GOT_TLS_IE
)
3014 tls_type
= GOT_TLS_IE_NEG
;
3016 if (! elf_i386_tls_transition (info
, input_bfd
,
3017 input_section
, contents
,
3018 symtab_hdr
, sym_hashes
,
3019 &r_type
, tls_type
, rel
,
3023 if (r_type
== R_386_TLS_LE_32
)
3025 BFD_ASSERT (! unresolved_reloc
);
3026 if (ELF32_R_TYPE (rel
->r_info
) == R_386_TLS_GD
)
3031 /* GD->LE transition. */
3032 type
= bfd_get_8 (input_bfd
, contents
+ rel
->r_offset
- 2);
3035 /* leal foo(,%reg,1), %eax; call ___tls_get_addr
3037 movl %gs:0, %eax; subl $foo@tpoff, %eax
3038 (6 byte form of subl). */
3039 memcpy (contents
+ rel
->r_offset
- 3,
3040 "\x65\xa1\0\0\0\0\x81\xe8\0\0\0", 12);
3041 roff
= rel
->r_offset
+ 5;
3045 /* leal foo(%reg), %eax; call ___tls_get_addr; nop
3047 movl %gs:0, %eax; subl $foo@tpoff, %eax
3048 (6 byte form of subl). */
3049 memcpy (contents
+ rel
->r_offset
- 2,
3050 "\x65\xa1\0\0\0\0\x81\xe8\0\0\0", 12);
3051 roff
= rel
->r_offset
+ 6;
3053 bfd_put_32 (output_bfd
, elf_i386_tpoff (info
, relocation
),
3055 /* Skip R_386_PC32/R_386_PLT32. */
3059 else if (ELF32_R_TYPE (rel
->r_info
) == R_386_TLS_GOTDESC
)
3061 /* GDesc -> LE transition.
3062 It's originally something like:
3063 leal x@tlsdesc(%ebx), %eax
3067 Registers other than %eax may be set up here. */
3072 roff
= rel
->r_offset
;
3073 val
= bfd_get_8 (input_bfd
, contents
+ roff
- 1);
3075 /* Now modify the instruction as appropriate. */
3076 /* aoliva FIXME: remove the above and xor the byte
3078 bfd_put_8 (output_bfd
, val
^ 0x86,
3079 contents
+ roff
- 1);
3080 bfd_put_32 (output_bfd
, -elf_i386_tpoff (info
, relocation
),
3084 else if (ELF32_R_TYPE (rel
->r_info
) == R_386_TLS_DESC_CALL
)
3086 /* GDesc -> LE transition.
3094 roff
= rel
->r_offset
;
3095 bfd_put_8 (output_bfd
, 0x66, contents
+ roff
);
3096 bfd_put_8 (output_bfd
, 0x90, contents
+ roff
+ 1);
3099 else if (ELF32_R_TYPE (rel
->r_info
) == R_386_TLS_IE
)
3103 /* IE->LE transition:
3104 Originally it can be one of:
3112 val
= bfd_get_8 (input_bfd
, contents
+ rel
->r_offset
- 1);
3115 /* movl foo, %eax. */
3116 bfd_put_8 (output_bfd
, 0xb8,
3117 contents
+ rel
->r_offset
- 1);
3123 type
= bfd_get_8 (input_bfd
,
3124 contents
+ rel
->r_offset
- 2);
3129 bfd_put_8 (output_bfd
, 0xc7,
3130 contents
+ rel
->r_offset
- 2);
3131 bfd_put_8 (output_bfd
,
3132 0xc0 | ((val
>> 3) & 7),
3133 contents
+ rel
->r_offset
- 1);
3137 bfd_put_8 (output_bfd
, 0x81,
3138 contents
+ rel
->r_offset
- 2);
3139 bfd_put_8 (output_bfd
,
3140 0xc0 | ((val
>> 3) & 7),
3141 contents
+ rel
->r_offset
- 1);
3148 bfd_put_32 (output_bfd
, -elf_i386_tpoff (info
, relocation
),
3149 contents
+ rel
->r_offset
);
3154 unsigned int val
, type
;
3156 /* {IE_32,GOTIE}->LE transition:
3157 Originally it can be one of:
3158 subl foo(%reg1), %reg2
3159 movl foo(%reg1), %reg2
3160 addl foo(%reg1), %reg2
3163 movl $foo, %reg2 (6 byte form)
3164 addl $foo, %reg2. */
3165 type
= bfd_get_8 (input_bfd
, contents
+ rel
->r_offset
- 2);
3166 val
= bfd_get_8 (input_bfd
, contents
+ rel
->r_offset
- 1);
3170 bfd_put_8 (output_bfd
, 0xc7,
3171 contents
+ rel
->r_offset
- 2);
3172 bfd_put_8 (output_bfd
, 0xc0 | ((val
>> 3) & 7),
3173 contents
+ rel
->r_offset
- 1);
3175 else if (type
== 0x2b)
3178 bfd_put_8 (output_bfd
, 0x81,
3179 contents
+ rel
->r_offset
- 2);
3180 bfd_put_8 (output_bfd
, 0xe8 | ((val
>> 3) & 7),
3181 contents
+ rel
->r_offset
- 1);
3183 else if (type
== 0x03)
3186 bfd_put_8 (output_bfd
, 0x81,
3187 contents
+ rel
->r_offset
- 2);
3188 bfd_put_8 (output_bfd
, 0xc0 | ((val
>> 3) & 7),
3189 contents
+ rel
->r_offset
- 1);
3193 if (ELF32_R_TYPE (rel
->r_info
) == R_386_TLS_GOTIE
)
3194 bfd_put_32 (output_bfd
, -elf_i386_tpoff (info
, relocation
),
3195 contents
+ rel
->r_offset
);
3197 bfd_put_32 (output_bfd
, elf_i386_tpoff (info
, relocation
),
3198 contents
+ rel
->r_offset
);
3203 if (htab
->sgot
== NULL
)
3208 off
= h
->got
.offset
;
3209 offplt
= elf_i386_hash_entry (h
)->tlsdesc_got
;
3213 if (local_got_offsets
== NULL
)
3216 off
= local_got_offsets
[r_symndx
];
3217 offplt
= local_tlsdesc_gotents
[r_symndx
];
3224 Elf_Internal_Rela outrel
;
3229 if (htab
->srelgot
== NULL
)
3232 indx
= h
&& h
->dynindx
!= -1 ? h
->dynindx
: 0;
3234 if (GOT_TLS_GDESC_P (tls_type
))
3236 outrel
.r_info
= ELF32_R_INFO (indx
, R_386_TLS_DESC
);
3237 BFD_ASSERT (htab
->sgotplt_jump_table_size
+ offplt
+ 8
3238 <= htab
->sgotplt
->size
);
3239 outrel
.r_offset
= (htab
->sgotplt
->output_section
->vma
3240 + htab
->sgotplt
->output_offset
3242 + htab
->sgotplt_jump_table_size
);
3243 sreloc
= htab
->srelplt
;
3244 loc
= sreloc
->contents
;
3245 loc
+= (htab
->next_tls_desc_index
++
3246 * sizeof (Elf32_External_Rel
));
3247 BFD_ASSERT (loc
+ sizeof (Elf32_External_Rel
)
3248 <= sreloc
->contents
+ sreloc
->size
);
3249 bfd_elf32_swap_reloc_out (output_bfd
, &outrel
, loc
);
3252 BFD_ASSERT (! unresolved_reloc
);
3253 bfd_put_32 (output_bfd
,
3254 relocation
- elf_i386_dtpoff_base (info
),
3255 htab
->sgotplt
->contents
+ offplt
3256 + htab
->sgotplt_jump_table_size
+ 4);
3260 bfd_put_32 (output_bfd
, 0,
3261 htab
->sgotplt
->contents
+ offplt
3262 + htab
->sgotplt_jump_table_size
+ 4);
3266 sreloc
= htab
->srelgot
;
3268 outrel
.r_offset
= (htab
->sgot
->output_section
->vma
3269 + htab
->sgot
->output_offset
+ off
);
3271 if (GOT_TLS_GD_P (tls_type
))
3272 dr_type
= R_386_TLS_DTPMOD32
;
3273 else if (GOT_TLS_GDESC_P (tls_type
))
3275 else if (tls_type
== GOT_TLS_IE_POS
)
3276 dr_type
= R_386_TLS_TPOFF
;
3278 dr_type
= R_386_TLS_TPOFF32
;
3280 if (dr_type
== R_386_TLS_TPOFF
&& indx
== 0)
3281 bfd_put_32 (output_bfd
,
3282 relocation
- elf_i386_dtpoff_base (info
),
3283 htab
->sgot
->contents
+ off
);
3284 else if (dr_type
== R_386_TLS_TPOFF32
&& indx
== 0)
3285 bfd_put_32 (output_bfd
,
3286 elf_i386_dtpoff_base (info
) - relocation
,
3287 htab
->sgot
->contents
+ off
);
3288 else if (dr_type
!= R_386_TLS_DESC
)
3289 bfd_put_32 (output_bfd
, 0,
3290 htab
->sgot
->contents
+ off
);
3291 outrel
.r_info
= ELF32_R_INFO (indx
, dr_type
);
3293 loc
= sreloc
->contents
;
3294 loc
+= sreloc
->reloc_count
++ * sizeof (Elf32_External_Rel
);
3295 BFD_ASSERT (loc
+ sizeof (Elf32_External_Rel
)
3296 <= sreloc
->contents
+ sreloc
->size
);
3297 bfd_elf32_swap_reloc_out (output_bfd
, &outrel
, loc
);
3299 if (GOT_TLS_GD_P (tls_type
))
3303 BFD_ASSERT (! unresolved_reloc
);
3304 bfd_put_32 (output_bfd
,
3305 relocation
- elf_i386_dtpoff_base (info
),
3306 htab
->sgot
->contents
+ off
+ 4);
3310 bfd_put_32 (output_bfd
, 0,
3311 htab
->sgot
->contents
+ off
+ 4);
3312 outrel
.r_info
= ELF32_R_INFO (indx
,
3313 R_386_TLS_DTPOFF32
);
3314 outrel
.r_offset
+= 4;
3315 sreloc
->reloc_count
++;
3316 loc
+= sizeof (Elf32_External_Rel
);
3317 BFD_ASSERT (loc
+ sizeof (Elf32_External_Rel
)
3318 <= sreloc
->contents
+ sreloc
->size
);
3319 bfd_elf32_swap_reloc_out (output_bfd
, &outrel
, loc
);
3322 else if (tls_type
== GOT_TLS_IE_BOTH
)
3324 bfd_put_32 (output_bfd
,
3326 ? relocation
- elf_i386_dtpoff_base (info
)
3328 htab
->sgot
->contents
+ off
+ 4);
3329 outrel
.r_info
= ELF32_R_INFO (indx
, R_386_TLS_TPOFF
);
3330 outrel
.r_offset
+= 4;
3331 sreloc
->reloc_count
++;
3332 loc
+= sizeof (Elf32_External_Rel
);
3333 bfd_elf32_swap_reloc_out (output_bfd
, &outrel
, loc
);
3340 local_got_offsets
[r_symndx
] |= 1;
3343 if (off
>= (bfd_vma
) -2
3344 && ! GOT_TLS_GDESC_P (tls_type
))
3346 if (r_type
== R_386_TLS_GOTDESC
3347 || r_type
== R_386_TLS_DESC_CALL
)
3349 relocation
= htab
->sgotplt_jump_table_size
+ offplt
;
3350 unresolved_reloc
= FALSE
;
3352 else if (r_type
== ELF32_R_TYPE (rel
->r_info
))
3354 bfd_vma g_o_t
= htab
->sgotplt
->output_section
->vma
3355 + htab
->sgotplt
->output_offset
;
3356 relocation
= htab
->sgot
->output_section
->vma
3357 + htab
->sgot
->output_offset
+ off
- g_o_t
;
3358 if ((r_type
== R_386_TLS_IE
|| r_type
== R_386_TLS_GOTIE
)
3359 && tls_type
== GOT_TLS_IE_BOTH
)
3361 if (r_type
== R_386_TLS_IE
)
3362 relocation
+= g_o_t
;
3363 unresolved_reloc
= FALSE
;
3365 else if (ELF32_R_TYPE (rel
->r_info
) == R_386_TLS_GD
)
3367 unsigned int val
, type
;
3370 /* GD->IE transition. */
3371 type
= bfd_get_8 (input_bfd
, contents
+ rel
->r_offset
- 2);
3372 val
= bfd_get_8 (input_bfd
, contents
+ rel
->r_offset
- 1);
3375 /* leal foo(,%reg,1), %eax; call ___tls_get_addr
3377 movl %gs:0, %eax; subl $foo@gottpoff(%reg), %eax. */
3379 roff
= rel
->r_offset
- 3;
3383 /* leal foo(%reg), %eax; call ___tls_get_addr; nop
3385 movl %gs:0, %eax; subl $foo@gottpoff(%reg), %eax. */
3386 roff
= rel
->r_offset
- 2;
3388 memcpy (contents
+ roff
,
3389 "\x65\xa1\0\0\0\0\x2b\x80\0\0\0", 12);
3390 contents
[roff
+ 7] = 0x80 | (val
& 7);
3391 /* If foo is used only with foo@gotntpoff(%reg) and
3392 foo@indntpoff, but not with foo@gottpoff(%reg), change
3393 subl $foo@gottpoff(%reg), %eax
3395 addl $foo@gotntpoff(%reg), %eax. */
3396 if (tls_type
== GOT_TLS_IE_POS
)
3397 contents
[roff
+ 6] = 0x03;
3398 bfd_put_32 (output_bfd
,
3399 htab
->sgot
->output_section
->vma
3400 + htab
->sgot
->output_offset
+ off
3401 - htab
->sgotplt
->output_section
->vma
3402 - htab
->sgotplt
->output_offset
,
3403 contents
+ roff
+ 8);
3404 /* Skip R_386_PLT32. */
3408 else if (ELF32_R_TYPE (rel
->r_info
) == R_386_TLS_GOTDESC
)
3410 /* GDesc -> IE transition.
3411 It's originally something like:
3412 leal x@tlsdesc(%ebx), %eax
3415 movl x@gotntpoff(%ebx), %eax # before xchg %ax,%ax
3417 movl x@gottpoff(%ebx), %eax # before negl %eax
3419 Registers other than %eax may be set up here. */
3423 /* First, make sure it's a leal adding ebx to a 32-bit
3424 offset into any register, although it's probably
3425 almost always going to be eax. */
3426 roff
= rel
->r_offset
;
3428 /* Now modify the instruction as appropriate. */
3429 /* To turn a leal into a movl in the form we use it, it
3430 suffices to change the first byte from 0x8d to 0x8b.
3431 aoliva FIXME: should we decide to keep the leal, all
3432 we have to do is remove the statement below, and
3433 adjust the relaxation of R_386_TLS_DESC_CALL. */
3434 bfd_put_8 (output_bfd
, 0x8b, contents
+ roff
- 2);
3436 if (tls_type
== GOT_TLS_IE_BOTH
)
3439 bfd_put_32 (output_bfd
,
3440 htab
->sgot
->output_section
->vma
3441 + htab
->sgot
->output_offset
+ off
3442 - htab
->sgotplt
->output_section
->vma
3443 - htab
->sgotplt
->output_offset
,
3447 else if (ELF32_R_TYPE (rel
->r_info
) == R_386_TLS_DESC_CALL
)
3449 /* GDesc -> IE transition.
3457 depending on how we transformed the TLS_GOTDESC above.
3462 roff
= rel
->r_offset
;
3464 /* Now modify the instruction as appropriate. */
3465 if (tls_type
!= GOT_TLS_IE_NEG
)
3468 bfd_put_8 (output_bfd
, 0x66, contents
+ roff
);
3469 bfd_put_8 (output_bfd
, 0x90, contents
+ roff
+ 1);
3474 bfd_put_8 (output_bfd
, 0xf7, contents
+ roff
);
3475 bfd_put_8 (output_bfd
, 0xd8, contents
+ roff
+ 1);
3485 if (! elf_i386_tls_transition (info
, input_bfd
,
3486 input_section
, contents
,
3487 symtab_hdr
, sym_hashes
,
3488 &r_type
, GOT_UNKNOWN
, rel
,
3492 if (r_type
!= R_386_TLS_LDM
)
3494 /* LD->LE transition:
3495 leal foo(%reg), %eax; call ___tls_get_addr.
3497 movl %gs:0, %eax; nop; leal 0(%esi,1), %esi. */
3498 BFD_ASSERT (r_type
== R_386_TLS_LE_32
);
3499 memcpy (contents
+ rel
->r_offset
- 2,
3500 "\x65\xa1\0\0\0\0\x90\x8d\x74\x26", 11);
3501 /* Skip R_386_PC32/R_386_PLT32. */
3506 if (htab
->sgot
== NULL
)
3509 off
= htab
->tls_ldm_got
.offset
;
3514 Elf_Internal_Rela outrel
;
3517 if (htab
->srelgot
== NULL
)
3520 outrel
.r_offset
= (htab
->sgot
->output_section
->vma
3521 + htab
->sgot
->output_offset
+ off
);
3523 bfd_put_32 (output_bfd
, 0,
3524 htab
->sgot
->contents
+ off
);
3525 bfd_put_32 (output_bfd
, 0,
3526 htab
->sgot
->contents
+ off
+ 4);
3527 outrel
.r_info
= ELF32_R_INFO (0, R_386_TLS_DTPMOD32
);
3528 loc
= htab
->srelgot
->contents
;
3529 loc
+= htab
->srelgot
->reloc_count
++ * sizeof (Elf32_External_Rel
);
3530 bfd_elf32_swap_reloc_out (output_bfd
, &outrel
, loc
);
3531 htab
->tls_ldm_got
.offset
|= 1;
3533 relocation
= htab
->sgot
->output_section
->vma
3534 + htab
->sgot
->output_offset
+ off
3535 - htab
->sgotplt
->output_section
->vma
3536 - htab
->sgotplt
->output_offset
;
3537 unresolved_reloc
= FALSE
;
3540 case R_386_TLS_LDO_32
:
3541 if (info
->shared
|| (input_section
->flags
& SEC_CODE
) == 0)
3542 relocation
-= elf_i386_dtpoff_base (info
);
3544 /* When converting LDO to LE, we must negate. */
3545 relocation
= -elf_i386_tpoff (info
, relocation
);
3548 case R_386_TLS_LE_32
:
3552 Elf_Internal_Rela outrel
;
3557 outrel
.r_offset
= rel
->r_offset
3558 + input_section
->output_section
->vma
3559 + input_section
->output_offset
;
3560 if (h
!= NULL
&& h
->dynindx
!= -1)
3564 if (r_type
== R_386_TLS_LE_32
)
3565 outrel
.r_info
= ELF32_R_INFO (indx
, R_386_TLS_TPOFF32
);
3567 outrel
.r_info
= ELF32_R_INFO (indx
, R_386_TLS_TPOFF
);
3568 sreloc
= elf_section_data (input_section
)->sreloc
;
3571 loc
= sreloc
->contents
;
3572 loc
+= sreloc
->reloc_count
++ * sizeof (Elf32_External_Rel
);
3573 bfd_elf32_swap_reloc_out (output_bfd
, &outrel
, loc
);
3576 else if (r_type
== R_386_TLS_LE_32
)
3577 relocation
= elf_i386_dtpoff_base (info
) - relocation
;
3579 relocation
-= elf_i386_dtpoff_base (info
);
3581 else if (r_type
== R_386_TLS_LE_32
)
3582 relocation
= elf_i386_tpoff (info
, relocation
);
3584 relocation
= -elf_i386_tpoff (info
, relocation
);
3591 /* Dynamic relocs are not propagated for SEC_DEBUGGING sections
3592 because such sections are not SEC_ALLOC and thus ld.so will
3593 not process them. */
3594 if (unresolved_reloc
3595 && !((input_section
->flags
& SEC_DEBUGGING
) != 0
3598 (*_bfd_error_handler
)
3599 (_("%B(%A+0x%lx): unresolvable %s relocation against symbol `%s'"),
3602 (long) rel
->r_offset
,
3604 h
->root
.root
.string
);
3608 r
= _bfd_final_link_relocate (howto
, input_bfd
, input_section
,
3609 contents
, rel
->r_offset
,
3612 if (r
!= bfd_reloc_ok
)
3617 name
= h
->root
.root
.string
;
3620 name
= bfd_elf_string_from_elf_section (input_bfd
,
3621 symtab_hdr
->sh_link
,
3626 name
= bfd_section_name (input_bfd
, sec
);
3629 if (r
== bfd_reloc_overflow
)
3631 if (! ((*info
->callbacks
->reloc_overflow
)
3632 (info
, (h
? &h
->root
: NULL
), name
, howto
->name
,
3633 (bfd_vma
) 0, input_bfd
, input_section
,
3639 (*_bfd_error_handler
)
3640 (_("%B(%A+0x%lx): reloc against `%s': error %d"),
3641 input_bfd
, input_section
,
3642 (long) rel
->r_offset
, name
, (int) r
);
3651 /* Finish up dynamic symbol handling. We set the contents of various
3652 dynamic sections here. */
3655 elf_i386_finish_dynamic_symbol (bfd
*output_bfd
,
3656 struct bfd_link_info
*info
,
3657 struct elf_link_hash_entry
*h
,
3658 Elf_Internal_Sym
*sym
)
3660 struct elf_i386_link_hash_table
*htab
;
3662 htab
= elf_i386_hash_table (info
);
3664 if (h
->plt
.offset
!= (bfd_vma
) -1)
3668 Elf_Internal_Rela rel
;
3671 /* This symbol has an entry in the procedure linkage table. Set
3674 if (h
->dynindx
== -1
3675 || htab
->splt
== NULL
3676 || htab
->sgotplt
== NULL
3677 || htab
->srelplt
== NULL
)
3680 /* Get the index in the procedure linkage table which
3681 corresponds to this symbol. This is the index of this symbol
3682 in all the symbols for which we are making plt entries. The
3683 first entry in the procedure linkage table is reserved. */
3684 plt_index
= h
->plt
.offset
/ PLT_ENTRY_SIZE
- 1;
3686 /* Get the offset into the .got table of the entry that
3687 corresponds to this function. Each .got entry is 4 bytes.
3688 The first three are reserved. */
3689 got_offset
= (plt_index
+ 3) * 4;
3691 /* Fill in the entry in the procedure linkage table. */
3694 memcpy (htab
->splt
->contents
+ h
->plt
.offset
, elf_i386_plt_entry
,
3696 bfd_put_32 (output_bfd
,
3697 (htab
->sgotplt
->output_section
->vma
3698 + htab
->sgotplt
->output_offset
3700 htab
->splt
->contents
+ h
->plt
.offset
+ 2);
3702 if (htab
->is_vxworks
)
3704 int s
, k
, reloc_index
;
3706 /* Create the R_386_32 relocation referencing the GOT
3707 for this PLT entry. */
3709 /* S: Current slot number (zero-based). */
3710 s
= (h
->plt
.offset
- PLT_ENTRY_SIZE
) / PLT_ENTRY_SIZE
;
3711 /* K: Number of relocations for PLTResolve. */
3713 k
= PLTRESOLVE_RELOCS_SHLIB
;
3715 k
= PLTRESOLVE_RELOCS
;
3716 /* Skip the PLTresolve relocations, and the relocations for
3717 the other PLT slots. */
3718 reloc_index
= k
+ s
* PLT_NON_JUMP_SLOT_RELOCS
;
3719 loc
= (htab
->srelplt2
->contents
+ reloc_index
3720 * sizeof (Elf32_External_Rel
));
3722 rel
.r_offset
= (htab
->splt
->output_section
->vma
3723 + htab
->splt
->output_offset
3724 + h
->plt
.offset
+ 2),
3725 rel
.r_info
= ELF32_R_INFO (htab
->elf
.hgot
->indx
, R_386_32
);
3726 bfd_elf32_swap_reloc_out (output_bfd
, &rel
, loc
);
3728 /* Create the R_386_32 relocation referencing the beginning of
3729 the PLT for this GOT entry. */
3730 rel
.r_offset
= (htab
->sgotplt
->output_section
->vma
3731 + htab
->sgotplt
->output_offset
3733 rel
.r_info
= ELF32_R_INFO (htab
->elf
.hplt
->indx
, R_386_32
);
3734 bfd_elf32_swap_reloc_out (output_bfd
, &rel
,
3735 loc
+ sizeof (Elf32_External_Rel
));
3740 memcpy (htab
->splt
->contents
+ h
->plt
.offset
, elf_i386_pic_plt_entry
,
3742 bfd_put_32 (output_bfd
, got_offset
,
3743 htab
->splt
->contents
+ h
->plt
.offset
+ 2);
3746 bfd_put_32 (output_bfd
, plt_index
* sizeof (Elf32_External_Rel
),
3747 htab
->splt
->contents
+ h
->plt
.offset
+ 7);
3748 bfd_put_32 (output_bfd
, - (h
->plt
.offset
+ PLT_ENTRY_SIZE
),
3749 htab
->splt
->contents
+ h
->plt
.offset
+ 12);
3751 /* Fill in the entry in the global offset table. */
3752 bfd_put_32 (output_bfd
,
3753 (htab
->splt
->output_section
->vma
3754 + htab
->splt
->output_offset
3757 htab
->sgotplt
->contents
+ got_offset
);
3759 /* Fill in the entry in the .rel.plt section. */
3760 rel
.r_offset
= (htab
->sgotplt
->output_section
->vma
3761 + htab
->sgotplt
->output_offset
3763 rel
.r_info
= ELF32_R_INFO (h
->dynindx
, R_386_JUMP_SLOT
);
3764 loc
= htab
->srelplt
->contents
+ plt_index
* sizeof (Elf32_External_Rel
);
3765 bfd_elf32_swap_reloc_out (output_bfd
, &rel
, loc
);
3767 if (!h
->def_regular
)
3769 /* Mark the symbol as undefined, rather than as defined in
3770 the .plt section. Leave the value if there were any
3771 relocations where pointer equality matters (this is a clue
3772 for the dynamic linker, to make function pointer
3773 comparisons work between an application and shared
3774 library), otherwise set it to zero. If a function is only
3775 called from a binary, there is no need to slow down
3776 shared libraries because of that. */
3777 sym
->st_shndx
= SHN_UNDEF
;
3778 if (!h
->pointer_equality_needed
)
3783 if (h
->got
.offset
!= (bfd_vma
) -1
3784 && ! GOT_TLS_GD_ANY_P (elf_i386_hash_entry(h
)->tls_type
)
3785 && (elf_i386_hash_entry(h
)->tls_type
& GOT_TLS_IE
) == 0)
3787 Elf_Internal_Rela rel
;
3790 /* This symbol has an entry in the global offset table. Set it
3793 if (htab
->sgot
== NULL
|| htab
->srelgot
== NULL
)
3796 rel
.r_offset
= (htab
->sgot
->output_section
->vma
3797 + htab
->sgot
->output_offset
3798 + (h
->got
.offset
& ~(bfd_vma
) 1));
3800 /* If this is a static link, or it is a -Bsymbolic link and the
3801 symbol is defined locally or was forced to be local because
3802 of a version file, we just want to emit a RELATIVE reloc.
3803 The entry in the global offset table will already have been
3804 initialized in the relocate_section function. */
3806 && SYMBOL_REFERENCES_LOCAL (info
, h
))
3808 BFD_ASSERT((h
->got
.offset
& 1) != 0);
3809 rel
.r_info
= ELF32_R_INFO (0, R_386_RELATIVE
);
3813 BFD_ASSERT((h
->got
.offset
& 1) == 0);
3814 bfd_put_32 (output_bfd
, (bfd_vma
) 0,
3815 htab
->sgot
->contents
+ h
->got
.offset
);
3816 rel
.r_info
= ELF32_R_INFO (h
->dynindx
, R_386_GLOB_DAT
);
3819 loc
= htab
->srelgot
->contents
;
3820 loc
+= htab
->srelgot
->reloc_count
++ * sizeof (Elf32_External_Rel
);
3821 bfd_elf32_swap_reloc_out (output_bfd
, &rel
, loc
);
3826 Elf_Internal_Rela rel
;
3829 /* This symbol needs a copy reloc. Set it up. */
3831 if (h
->dynindx
== -1
3832 || (h
->root
.type
!= bfd_link_hash_defined
3833 && h
->root
.type
!= bfd_link_hash_defweak
)
3834 || htab
->srelbss
== NULL
)
3837 rel
.r_offset
= (h
->root
.u
.def
.value
3838 + h
->root
.u
.def
.section
->output_section
->vma
3839 + h
->root
.u
.def
.section
->output_offset
);
3840 rel
.r_info
= ELF32_R_INFO (h
->dynindx
, R_386_COPY
);
3841 loc
= htab
->srelbss
->contents
;
3842 loc
+= htab
->srelbss
->reloc_count
++ * sizeof (Elf32_External_Rel
);
3843 bfd_elf32_swap_reloc_out (output_bfd
, &rel
, loc
);
3846 /* Mark _DYNAMIC and _GLOBAL_OFFSET_TABLE_ as absolute.
3847 On VxWorks, the _GLOBAL_OFFSET_TABLE_ symbol is not absolute: it
3848 is relative to the ".got" section. */
3849 if (strcmp (h
->root
.root
.string
, "_DYNAMIC") == 0
3850 || (!htab
->is_vxworks
&& h
== htab
->elf
.hgot
))
3851 sym
->st_shndx
= SHN_ABS
;
3856 /* Used to decide how to sort relocs in an optimal manner for the
3857 dynamic linker, before writing them out. */
3859 static enum elf_reloc_type_class
3860 elf_i386_reloc_type_class (const Elf_Internal_Rela
*rela
)
3862 switch (ELF32_R_TYPE (rela
->r_info
))
3864 case R_386_RELATIVE
:
3865 return reloc_class_relative
;
3866 case R_386_JUMP_SLOT
:
3867 return reloc_class_plt
;
3869 return reloc_class_copy
;
3871 return reloc_class_normal
;
3875 /* Finish up the dynamic sections. */
3878 elf_i386_finish_dynamic_sections (bfd
*output_bfd
,
3879 struct bfd_link_info
*info
)
3881 struct elf_i386_link_hash_table
*htab
;
3885 htab
= elf_i386_hash_table (info
);
3886 dynobj
= htab
->elf
.dynobj
;
3887 sdyn
= bfd_get_section_by_name (dynobj
, ".dynamic");
3889 if (htab
->elf
.dynamic_sections_created
)
3891 Elf32_External_Dyn
*dyncon
, *dynconend
;
3893 if (sdyn
== NULL
|| htab
->sgot
== NULL
)
3896 dyncon
= (Elf32_External_Dyn
*) sdyn
->contents
;
3897 dynconend
= (Elf32_External_Dyn
*) (sdyn
->contents
+ sdyn
->size
);
3898 for (; dyncon
< dynconend
; dyncon
++)
3900 Elf_Internal_Dyn dyn
;
3903 bfd_elf32_swap_dyn_in (dynobj
, dyncon
, &dyn
);
3908 if (htab
->is_vxworks
3909 && elf_vxworks_finish_dynamic_entry (output_bfd
, &dyn
))
3915 dyn
.d_un
.d_ptr
= s
->output_section
->vma
+ s
->output_offset
;
3920 dyn
.d_un
.d_ptr
= s
->output_section
->vma
+ s
->output_offset
;
3925 dyn
.d_un
.d_val
= s
->size
;
3929 /* My reading of the SVR4 ABI indicates that the
3930 procedure linkage table relocs (DT_JMPREL) should be
3931 included in the overall relocs (DT_REL). This is
3932 what Solaris does. However, UnixWare can not handle
3933 that case. Therefore, we override the DT_RELSZ entry
3934 here to make it not include the JMPREL relocs. */
3938 dyn
.d_un
.d_val
-= s
->size
;
3942 /* We may not be using the standard ELF linker script.
3943 If .rel.plt is the first .rel section, we adjust
3944 DT_REL to not include it. */
3948 if (dyn
.d_un
.d_ptr
!= s
->output_section
->vma
+ s
->output_offset
)
3950 dyn
.d_un
.d_ptr
+= s
->size
;
3954 bfd_elf32_swap_dyn_out (output_bfd
, &dyn
, dyncon
);
3957 /* Fill in the first entry in the procedure linkage table. */
3958 if (htab
->splt
&& htab
->splt
->size
> 0)
3962 memcpy (htab
->splt
->contents
, elf_i386_pic_plt0_entry
,
3963 sizeof (elf_i386_pic_plt0_entry
));
3964 memset (htab
->splt
->contents
+ sizeof (elf_i386_pic_plt0_entry
),
3965 htab
->plt0_pad_byte
,
3966 PLT_ENTRY_SIZE
- sizeof (elf_i386_pic_plt0_entry
));
3970 memcpy (htab
->splt
->contents
, elf_i386_plt0_entry
,
3971 sizeof(elf_i386_plt0_entry
));
3972 memset (htab
->splt
->contents
+ sizeof (elf_i386_plt0_entry
),
3973 htab
->plt0_pad_byte
,
3974 PLT_ENTRY_SIZE
- sizeof (elf_i386_plt0_entry
));
3975 bfd_put_32 (output_bfd
,
3976 (htab
->sgotplt
->output_section
->vma
3977 + htab
->sgotplt
->output_offset
3979 htab
->splt
->contents
+ 2);
3980 bfd_put_32 (output_bfd
,
3981 (htab
->sgotplt
->output_section
->vma
3982 + htab
->sgotplt
->output_offset
3984 htab
->splt
->contents
+ 8);
3986 if (htab
->is_vxworks
)
3988 Elf_Internal_Rela rel
;
3990 /* Generate a relocation for _GLOBAL_OFFSET_TABLE_ + 4.
3991 On IA32 we use REL relocations so the addend goes in
3992 the PLT directly. */
3993 rel
.r_offset
= (htab
->splt
->output_section
->vma
3994 + htab
->splt
->output_offset
3996 rel
.r_info
= ELF32_R_INFO (htab
->elf
.hgot
->indx
, R_386_32
);
3997 bfd_elf32_swap_reloc_out (output_bfd
, &rel
,
3998 htab
->srelplt2
->contents
);
3999 /* Generate a relocation for _GLOBAL_OFFSET_TABLE_ + 8. */
4000 rel
.r_offset
= (htab
->splt
->output_section
->vma
4001 + htab
->splt
->output_offset
4003 rel
.r_info
= ELF32_R_INFO (htab
->elf
.hgot
->indx
, R_386_32
);
4004 bfd_elf32_swap_reloc_out (output_bfd
, &rel
,
4005 htab
->srelplt2
->contents
+
4006 sizeof (Elf32_External_Rel
));
4010 /* UnixWare sets the entsize of .plt to 4, although that doesn't
4011 really seem like the right value. */
4012 elf_section_data (htab
->splt
->output_section
)
4013 ->this_hdr
.sh_entsize
= 4;
4015 /* Correct the .rel.plt.unloaded relocations. */
4016 if (htab
->is_vxworks
&& !info
->shared
)
4018 int num_plts
= (htab
->splt
->size
/ PLT_ENTRY_SIZE
) - 1;
4021 p
= htab
->srelplt2
->contents
;
4023 p
+= PLTRESOLVE_RELOCS_SHLIB
* sizeof (Elf32_External_Rel
);
4025 p
+= PLTRESOLVE_RELOCS
* sizeof (Elf32_External_Rel
);
4027 for (; num_plts
; num_plts
--)
4029 Elf_Internal_Rela rel
;
4030 bfd_elf32_swap_reloc_in (output_bfd
, p
, &rel
);
4031 rel
.r_info
= ELF32_R_INFO (htab
->elf
.hgot
->indx
, R_386_32
);
4032 bfd_elf32_swap_reloc_out (output_bfd
, &rel
, p
);
4033 p
+= sizeof (Elf32_External_Rel
);
4035 bfd_elf32_swap_reloc_in (output_bfd
, p
, &rel
);
4036 rel
.r_info
= ELF32_R_INFO (htab
->elf
.hplt
->indx
, R_386_32
);
4037 bfd_elf32_swap_reloc_out (output_bfd
, &rel
, p
);
4038 p
+= sizeof (Elf32_External_Rel
);
4046 /* Fill in the first three entries in the global offset table. */
4047 if (htab
->sgotplt
->size
> 0)
4049 bfd_put_32 (output_bfd
,
4051 : sdyn
->output_section
->vma
+ sdyn
->output_offset
),
4052 htab
->sgotplt
->contents
);
4053 bfd_put_32 (output_bfd
, 0, htab
->sgotplt
->contents
+ 4);
4054 bfd_put_32 (output_bfd
, 0, htab
->sgotplt
->contents
+ 8);
4057 elf_section_data (htab
->sgotplt
->output_section
)->this_hdr
.sh_entsize
= 4;
4060 if (htab
->sgot
&& htab
->sgot
->size
> 0)
4061 elf_section_data (htab
->sgot
->output_section
)->this_hdr
.sh_entsize
= 4;
4066 /* Return address for Ith PLT stub in section PLT, for relocation REL
4067 or (bfd_vma) -1 if it should not be included. */
4070 elf_i386_plt_sym_val (bfd_vma i
, const asection
*plt
,
4071 const arelent
*rel ATTRIBUTE_UNUSED
)
4073 return plt
->vma
+ (i
+ 1) * PLT_ENTRY_SIZE
;
4076 /* Return TRUE if symbol should be hashed in the `.gnu.hash' section. */
4079 elf_i386_hash_symbol (struct elf_link_hash_entry
*h
)
4081 if (h
->plt
.offset
!= (bfd_vma
) -1
4083 && !h
->pointer_equality_needed
)
4086 return _bfd_elf_hash_symbol (h
);
4089 /* Hook called by the linker routine which adds symbols from an object
4093 elf_i386_add_symbol_hook (bfd
* abfd ATTRIBUTE_UNUSED
,
4094 struct bfd_link_info
* info ATTRIBUTE_UNUSED
,
4095 Elf_Internal_Sym
* sym
,
4096 const char ** namep ATTRIBUTE_UNUSED
,
4097 flagword
* flagsp ATTRIBUTE_UNUSED
,
4098 asection
** secp ATTRIBUTE_UNUSED
,
4099 bfd_vma
* valp ATTRIBUTE_UNUSED
)
4101 if (ELF_ST_TYPE (sym
->st_info
) == STT_GNU_IFUNC
)
4102 elf_tdata (info
->output_bfd
)->has_ifunc_symbols
= TRUE
;
4107 #define TARGET_LITTLE_SYM bfd_elf32_i386_vec
4108 #define TARGET_LITTLE_NAME "elf32-i386"
4109 #define ELF_ARCH bfd_arch_i386
4110 #define ELF_MACHINE_CODE EM_386
4111 #define ELF_MAXPAGESIZE 0x1000
4113 #define elf_backend_can_gc_sections 1
4114 #define elf_backend_can_refcount 1
4115 #define elf_backend_want_got_plt 1
4116 #define elf_backend_plt_readonly 1
4117 #define elf_backend_want_plt_sym 0
4118 #define elf_backend_got_header_size 12
4120 /* Support RELA for objdump of prelink objects. */
4121 #define elf_info_to_howto elf_i386_info_to_howto_rel
4122 #define elf_info_to_howto_rel elf_i386_info_to_howto_rel
4124 #define bfd_elf32_mkobject elf_i386_mkobject
4126 #define bfd_elf32_bfd_is_local_label_name elf_i386_is_local_label_name
4127 #define bfd_elf32_bfd_link_hash_table_create elf_i386_link_hash_table_create
4128 #define bfd_elf32_bfd_reloc_type_lookup elf_i386_reloc_type_lookup
4129 #define bfd_elf32_bfd_reloc_name_lookup elf_i386_reloc_name_lookup
4131 #define elf_backend_adjust_dynamic_symbol elf_i386_adjust_dynamic_symbol
4132 #define elf_backend_relocs_compatible _bfd_elf_relocs_compatible
4133 #define elf_backend_check_relocs elf_i386_check_relocs
4134 #define elf_backend_copy_indirect_symbol elf_i386_copy_indirect_symbol
4135 #define elf_backend_create_dynamic_sections elf_i386_create_dynamic_sections
4136 #define elf_backend_fake_sections elf_i386_fake_sections
4137 #define elf_backend_finish_dynamic_sections elf_i386_finish_dynamic_sections
4138 #define elf_backend_finish_dynamic_symbol elf_i386_finish_dynamic_symbol
4139 #define elf_backend_gc_mark_hook elf_i386_gc_mark_hook
4140 #define elf_backend_gc_sweep_hook elf_i386_gc_sweep_hook
4141 #define elf_backend_grok_prstatus elf_i386_grok_prstatus
4142 #define elf_backend_grok_psinfo elf_i386_grok_psinfo
4143 #define elf_backend_reloc_type_class elf_i386_reloc_type_class
4144 #define elf_backend_relocate_section elf_i386_relocate_section
4145 #define elf_backend_size_dynamic_sections elf_i386_size_dynamic_sections
4146 #define elf_backend_always_size_sections elf_i386_always_size_sections
4147 #define elf_backend_omit_section_dynsym \
4148 ((bfd_boolean (*) (bfd *, struct bfd_link_info *, asection *)) bfd_true)
4149 #define elf_backend_plt_sym_val elf_i386_plt_sym_val
4150 #define elf_backend_hash_symbol elf_i386_hash_symbol
4151 #define elf_backend_add_symbol_hook elf_i386_add_symbol_hook
4152 #undef elf_backend_post_process_headers
4153 #define elf_backend_post_process_headers _bfd_elf_set_osabi
4155 #include "elf32-target.h"
4157 /* FreeBSD support. */
4159 #undef TARGET_LITTLE_SYM
4160 #define TARGET_LITTLE_SYM bfd_elf32_i386_freebsd_vec
4161 #undef TARGET_LITTLE_NAME
4162 #define TARGET_LITTLE_NAME "elf32-i386-freebsd"
4164 #define ELF_OSABI ELFOSABI_FREEBSD
4166 /* The kernel recognizes executables as valid only if they carry a
4167 "FreeBSD" label in the ELF header. So we put this label on all
4168 executables and (for simplicity) also all other object files. */
4171 elf_i386_fbsd_post_process_headers (bfd
*abfd
, struct bfd_link_info
*info
)
4173 _bfd_elf_set_osabi (abfd
, info
);
4175 #ifdef OLD_FREEBSD_ABI_LABEL
4176 /* The ABI label supported by FreeBSD <= 4.0 is quite nonstandard. */
4177 memcpy (&i_ehdrp
->e_ident
[EI_ABIVERSION
], "FreeBSD", 8);
4181 #undef elf_backend_post_process_headers
4182 #define elf_backend_post_process_headers elf_i386_fbsd_post_process_headers
4184 #define elf32_bed elf32_i386_fbsd_bed
4186 #undef elf_backend_add_symbol_hook
4188 #include "elf32-target.h"
4190 /* VxWorks support. */
4192 #undef TARGET_LITTLE_SYM
4193 #define TARGET_LITTLE_SYM bfd_elf32_i386_vxworks_vec
4194 #undef TARGET_LITTLE_NAME
4195 #define TARGET_LITTLE_NAME "elf32-i386-vxworks"
4198 /* Like elf_i386_link_hash_table_create but with tweaks for VxWorks. */
4200 static struct bfd_link_hash_table
*
4201 elf_i386_vxworks_link_hash_table_create (bfd
*abfd
)
4203 struct bfd_link_hash_table
*ret
;
4204 struct elf_i386_link_hash_table
*htab
;
4206 ret
= elf_i386_link_hash_table_create (abfd
);
4209 htab
= (struct elf_i386_link_hash_table
*) ret
;
4210 htab
->is_vxworks
= 1;
4211 htab
->plt0_pad_byte
= 0x90;
4218 #undef elf_backend_relocs_compatible
4219 #undef elf_backend_post_process_headers
4220 #undef bfd_elf32_bfd_link_hash_table_create
4221 #define bfd_elf32_bfd_link_hash_table_create \
4222 elf_i386_vxworks_link_hash_table_create
4223 #undef elf_backend_add_symbol_hook
4224 #define elf_backend_add_symbol_hook \
4225 elf_vxworks_add_symbol_hook
4226 #undef elf_backend_link_output_symbol_hook
4227 #define elf_backend_link_output_symbol_hook \
4228 elf_vxworks_link_output_symbol_hook
4229 #undef elf_backend_emit_relocs
4230 #define elf_backend_emit_relocs elf_vxworks_emit_relocs
4231 #undef elf_backend_final_write_processing
4232 #define elf_backend_final_write_processing \
4233 elf_vxworks_final_write_processing
4235 /* On VxWorks, we emit relocations against _PROCEDURE_LINKAGE_TABLE_, so
4237 #undef elf_backend_want_plt_sym
4238 #define elf_backend_want_plt_sym 1
4241 #define elf32_bed elf32_i386_vxworks_bed
4243 #include "elf32-target.h"